diff options
Diffstat (limited to 'drivers/input/touchscreen')
24 files changed, 6025 insertions, 1074 deletions
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig index 3b9d5e2105d7..06ea8da95c62 100644 --- a/drivers/input/touchscreen/Kconfig +++ b/drivers/input/touchscreen/Kconfig @@ -55,37 +55,36 @@ config TOUCHSCREEN_AD7877 To compile this driver as a module, choose M here: the module will be called ad7877. -config TOUCHSCREEN_AD7879_I2C - tristate "AD7879 based touchscreens: AD7879-1 I2C Interface" - depends on I2C - select TOUCHSCREEN_AD7879 +config TOUCHSCREEN_AD7879 + tristate "Analog Devices AD7879-1/AD7889-1 touchscreen interface" help - Say Y here if you have a touchscreen interface using the - AD7879-1/AD7889-1 controller, and your board-specific - initialization code includes that in its table of I2C devices. + Say Y here if you want to support a touchscreen interface using + the AD7879-1/AD7889-1 controller. - If unsure, say N (but it's safe to say "Y"). + You should select a bus connection too. To compile this driver as a module, choose M here: the module will be called ad7879. +config TOUCHSCREEN_AD7879_I2C + tristate "support I2C bus connection" + depends on TOUCHSCREEN_AD7879 && I2C + help + Say Y here if you have AD7879-1/AD7889-1 hooked to an I2C bus. + + To compile this driver as a module, choose M here: the + module will be called ad7879-i2c. + config TOUCHSCREEN_AD7879_SPI - tristate "AD7879 based touchscreens: AD7879 SPI Interface" - depends on SPI_MASTER && TOUCHSCREEN_AD7879_I2C = n - select TOUCHSCREEN_AD7879 + tristate "support SPI bus connection" + depends on TOUCHSCREEN_AD7879 && SPI_MASTER help - Say Y here if you have a touchscreen interface using the - AD7879/AD7889 controller, and your board-specific initialization - code includes that in its table of SPI devices. + Say Y here if you have AD7879-1/AD7889-1 hooked to a SPI bus. If unsure, say N (but it's safe to say "Y"). To compile this driver as a module, choose M here: the - module will be called ad7879. - -config TOUCHSCREEN_AD7879 - tristate - default n + module will be called ad7879-spi. config TOUCHSCREEN_BITSY tristate "Compaq iPAQ H3600 (Bitsy) touchscreen" @@ -99,6 +98,32 @@ config TOUCHSCREEN_BITSY To compile this driver as a module, choose M here: the module will be called h3600_ts_input. +config TOUCHSCREEN_BU21013 + tristate "BU21013 based touch panel controllers" + depends on I2C + help + Say Y here if you have a bu21013 touchscreen connected to + your system. + + If unsure, say N. + + To compile this driver as a module, choose M here: the + module will be called bu21013_ts. + +config TOUCHSCREEN_CY8CTMG110 + tristate "cy8ctmg110 touchscreen" + depends on I2C + depends on GPIOLIB + + help + Say Y here if you have a cy8ctmg110 capacitive touchscreen on + an AAVA device. + + If unsure, say N. + + To compile this driver as a module, choose M here: the + module will be called cy8ctmg110_ts. + config TOUCHSCREEN_DA9034 tristate "Touchscreen support for Dialog Semiconductor DA9034" depends on PMIC_DA903X @@ -201,6 +226,16 @@ config TOUCHSCREEN_WACOM_W8001 To compile this driver as a module, choose M here: the module will be called wacom_w8001. +config TOUCHSCREEN_LPC32XX + tristate "LPC32XX touchscreen controller" + depends on ARCH_LPC32XX + help + Say Y here if you have a LPC32XX device and want + to support the built-in touchscreen. + + To compile this driver as a module, choose M here: the + module will be called lpc32xx_ts. + config TOUCHSCREEN_MCS5000 tristate "MELFAS MCS-5000 touchscreen" depends on I2C @@ -237,6 +272,18 @@ config TOUCHSCREEN_INEXIO To compile this driver as a module, choose M here: the module will be called inexio. +config TOUCHSCREEN_INTEL_MID + tristate "Intel MID platform resistive touchscreen" + depends on INTEL_SCU_IPC + help + Say Y here if you have a Intel MID based touchscreen in + your system. + + If unsure, say N. + + To compile this driver as a module, choose M here: the + module will be called intel_mid_touch. + config TOUCHSCREEN_MK712 tristate "ICS MicroClock MK712 touchscreen" help @@ -292,6 +339,18 @@ config TOUCHSCREEN_PENMOUNT To compile this driver as a module, choose M here: the module will be called penmount. +config TOUCHSCREEN_QT602240 + tristate "QT602240 I2C Touchscreen" + depends on I2C + help + Say Y here if you have the AT42QT602240/ATMXT224 I2C touchscreen + connected to your system. + + If unsure, say N. + + To compile this driver as a module, choose M here: the + module will be called qt602240_ts. + config TOUCHSCREEN_MIGOR tristate "Renesas MIGO-R touchscreen" depends on SH_MIGOR && I2C @@ -303,6 +362,15 @@ config TOUCHSCREEN_MIGOR To compile this driver as a module, choose M here: the module will be called migor_ts. +config TOUCHSCREEN_TNETV107X + tristate "TI TNETV107X touchscreen support" + depends on ARCH_DAVINCI_TNETV107X + help + Say Y here if you want to use the TNETV107X touchscreen. + + To compile this driver as a module, choose M here: the + module will be called tnetv107x-ts. + config TOUCHSCREEN_TOUCHRIGHT tristate "Touchright serial touchscreen" select SERIO @@ -540,9 +608,9 @@ config TOUCHSCREEN_USB_ZYTRONIC bool "Zytronic controller" if EMBEDDED depends on TOUCHSCREEN_USB_COMPOSITE -config TOUCHSCREEN_USB_ETT_TC5UH +config TOUCHSCREEN_USB_ETT_TC45USB default y - bool "ET&T TC5UH touchscreen controler support" if EMBEDDED + bool "ET&T USB series TC4UM/TC5UH touchscreen controler support" if EMBEDDED depends on TOUCHSCREEN_USB_COMPOSITE config TOUCHSCREEN_USB_NEXIO @@ -603,4 +671,14 @@ config TOUCHSCREEN_TPS6507X To compile this driver as a module, choose M here: the module will be called tps6507x_ts. +config TOUCHSCREEN_STMPE + tristate "STMicroelectronics STMPE touchscreens" + depends on MFD_STMPE + help + Say Y here if you want support for STMicroelectronics + STMPE touchscreen controllers. + + To compile this driver as a module, choose M here: the + module will be called stmpe-ts. + endif diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile index 497964a7a214..7cc1b4f4b677 100644 --- a/drivers/input/touchscreen/Makefile +++ b/drivers/input/touchscreen/Makefile @@ -9,9 +9,14 @@ wm97xx-ts-y := wm97xx-core.o obj-$(CONFIG_TOUCHSCREEN_88PM860X) += 88pm860x-ts.o obj-$(CONFIG_TOUCHSCREEN_AD7877) += ad7877.o obj-$(CONFIG_TOUCHSCREEN_AD7879) += ad7879.o +obj-$(CONFIG_TOUCHSCREEN_AD7879_I2C) += ad7879-i2c.o +obj-$(CONFIG_TOUCHSCREEN_AD7879_SPI) += ad7879-spi.o obj-$(CONFIG_TOUCHSCREEN_ADS7846) += ads7846.o obj-$(CONFIG_TOUCHSCREEN_ATMEL_TSADCC) += atmel_tsadcc.o obj-$(CONFIG_TOUCHSCREEN_BITSY) += h3600_ts_input.o +obj-$(CONFIG_TOUCHSCREEN_BU21013) += bu21013_ts.o +obj-$(CONFIG_TOUCHSCREEN_CY8CTMG110) += cy8ctmg110_ts.o +obj-$(CONFIG_TOUCHSCREEN_DA9034) += da9034-ts.o obj-$(CONFIG_TOUCHSCREEN_DYNAPRO) += dynapro.o obj-$(CONFIG_TOUCHSCREEN_HAMPSHIRE) += hampshire.o obj-$(CONFIG_TOUCHSCREEN_GUNZE) += gunze.o @@ -19,6 +24,8 @@ obj-$(CONFIG_TOUCHSCREEN_EETI) += eeti_ts.o obj-$(CONFIG_TOUCHSCREEN_ELO) += elo.o obj-$(CONFIG_TOUCHSCREEN_FUJITSU) += fujitsu_ts.o obj-$(CONFIG_TOUCHSCREEN_INEXIO) += inexio.o +obj-$(CONFIG_TOUCHSCREEN_INTEL_MID) += intel-mid-touch.o +obj-$(CONFIG_TOUCHSCREEN_LPC32XX) += lpc32xx_ts.o obj-$(CONFIG_TOUCHSCREEN_MC13783) += mc13783_ts.o obj-$(CONFIG_TOUCHSCREEN_MCS5000) += mcs5000_ts.o obj-$(CONFIG_TOUCHSCREEN_MIGOR) += migor_ts.o @@ -30,7 +37,10 @@ obj-$(CONFIG_TOUCHSCREEN_HTCPEN) += htcpen.o obj-$(CONFIG_TOUCHSCREEN_USB_COMPOSITE) += usbtouchscreen.o obj-$(CONFIG_TOUCHSCREEN_PCAP) += pcap_ts.o obj-$(CONFIG_TOUCHSCREEN_PENMOUNT) += penmount.o +obj-$(CONFIG_TOUCHSCREEN_QT602240) += qt602240_ts.o obj-$(CONFIG_TOUCHSCREEN_S3C2410) += s3c2410_ts.o +obj-$(CONFIG_TOUCHSCREEN_STMPE) += stmpe-ts.o +obj-$(CONFIG_TOUCHSCREEN_TNETV107X) += tnetv107x-ts.o obj-$(CONFIG_TOUCHSCREEN_TOUCHIT213) += touchit213.o obj-$(CONFIG_TOUCHSCREEN_TOUCHRIGHT) += touchright.o obj-$(CONFIG_TOUCHSCREEN_TOUCHWIN) += touchwin.o @@ -38,7 +48,6 @@ obj-$(CONFIG_TOUCHSCREEN_TSC2007) += tsc2007.o obj-$(CONFIG_TOUCHSCREEN_UCB1400) += ucb1400_ts.o obj-$(CONFIG_TOUCHSCREEN_WACOM_W8001) += wacom_w8001.o obj-$(CONFIG_TOUCHSCREEN_WM97XX) += wm97xx-ts.o -obj-$(CONFIG_TOUCHSCREEN_DA9034) += da9034-ts.o wm97xx-ts-$(CONFIG_TOUCHSCREEN_WM9705) += wm9705.o wm97xx-ts-$(CONFIG_TOUCHSCREEN_WM9712) += wm9712.o wm97xx-ts-$(CONFIG_TOUCHSCREEN_WM9713) += wm9713.o diff --git a/drivers/input/touchscreen/ad7877.c b/drivers/input/touchscreen/ad7877.c index 5f0221cffef9..a1952fcc083e 100644 --- a/drivers/input/touchscreen/ad7877.c +++ b/drivers/input/touchscreen/ad7877.c @@ -191,13 +191,12 @@ struct ad7877 { struct spi_message msg; struct mutex mutex; - unsigned disabled:1; /* P: mutex */ - unsigned gpio3:1; /* P: mutex */ - unsigned gpio4:1; /* P: mutex */ + bool disabled; /* P: mutex */ + bool gpio3; /* P: mutex */ + bool gpio4; /* P: mutex */ spinlock_t lock; struct timer_list timer; /* P: lock */ - unsigned pending:1; /* P: lock */ /* * DMA (thus cache coherency maintenance) requires the @@ -206,8 +205,8 @@ struct ad7877 { u16 conversion_data[AD7877_NR_SENSE] ____cacheline_aligned; }; -static int gpio3; -module_param(gpio3, int, 0); +static bool gpio3; +module_param(gpio3, bool, 0); MODULE_PARM_DESC(gpio3, "If gpio3 is set to 1 AUX3 acts as GPIO3"); /* @@ -230,6 +229,7 @@ static int ad7877_read(struct spi_device *spi, u16 reg) AD7877_READADD(reg)); req->xfer[0].tx_buf = &req->command; req->xfer[0].len = 2; + req->xfer[0].cs_change = 1; req->xfer[1].rx_buf = &req->sample; req->xfer[1].len = 2; @@ -295,20 +295,25 @@ static int ad7877_read_adc(struct spi_device *spi, unsigned command) req->xfer[0].tx_buf = &req->reset; req->xfer[0].len = 2; + req->xfer[0].cs_change = 1; req->xfer[1].tx_buf = &req->ref_on; req->xfer[1].len = 2; req->xfer[1].delay_usecs = ts->vref_delay_usecs; + req->xfer[1].cs_change = 1; req->xfer[2].tx_buf = &req->command; req->xfer[2].len = 2; req->xfer[2].delay_usecs = ts->vref_delay_usecs; + req->xfer[2].cs_change = 1; req->xfer[3].rx_buf = &req->sample; req->xfer[3].len = 2; + req->xfer[3].cs_change = 1; req->xfer[4].tx_buf = &ts->cmd_crtl2; /*REF OFF*/ req->xfer[4].len = 2; + req->xfer[4].cs_change = 1; req->xfer[5].tx_buf = &ts->cmd_crtl1; /*DEFAULT*/ req->xfer[5].len = 2; @@ -327,7 +332,7 @@ static int ad7877_read_adc(struct spi_device *spi, unsigned command) return status ? : sample; } -static void ad7877_rx(struct ad7877 *ts) +static int ad7877_process_data(struct ad7877 *ts) { struct input_dev *input_dev = ts->input; unsigned Rt; @@ -354,11 +359,25 @@ static void ad7877_rx(struct ad7877 *ts) Rt /= z1; Rt = (Rt + 2047) >> 12; + /* + * Sample found inconsistent, pressure is beyond + * the maximum. Don't report it to user space. + */ + if (Rt > ts->pressure_max) + return -EINVAL; + + if (!timer_pending(&ts->timer)) + input_report_key(input_dev, BTN_TOUCH, 1); + input_report_abs(input_dev, ABS_X, x); input_report_abs(input_dev, ABS_Y, y); input_report_abs(input_dev, ABS_PRESSURE, Rt); input_sync(input_dev); + + return 0; } + + return -EINVAL; } static inline void ad7877_ts_event_release(struct ad7877 *ts) @@ -366,72 +385,56 @@ static inline void ad7877_ts_event_release(struct ad7877 *ts) struct input_dev *input_dev = ts->input; input_report_abs(input_dev, ABS_PRESSURE, 0); + input_report_key(input_dev, BTN_TOUCH, 0); input_sync(input_dev); } static void ad7877_timer(unsigned long handle) { struct ad7877 *ts = (void *)handle; + unsigned long flags; + spin_lock_irqsave(&ts->lock, flags); ad7877_ts_event_release(ts); + spin_unlock_irqrestore(&ts->lock, flags); } static irqreturn_t ad7877_irq(int irq, void *handle) { struct ad7877 *ts = handle; unsigned long flags; - int status; + int error; - /* - * The repeated conversion sequencer controlled by TMR kicked off - * too fast. We ignore the last and process the sample sequence - * currently in the queue. It can't be older than 9.4ms, and we - * need to avoid that ts->msg doesn't get issued twice while in work. - */ + error = spi_sync(ts->spi, &ts->msg); + if (error) { + dev_err(&ts->spi->dev, "spi_sync --> %d\n", error); + goto out; + } spin_lock_irqsave(&ts->lock, flags); - if (!ts->pending) { - ts->pending = 1; - - status = spi_async(ts->spi, &ts->msg); - if (status) - dev_err(&ts->spi->dev, "spi_sync --> %d\n", status); - } + error = ad7877_process_data(ts); + if (!error) + mod_timer(&ts->timer, jiffies + TS_PEN_UP_TIMEOUT); spin_unlock_irqrestore(&ts->lock, flags); +out: return IRQ_HANDLED; } -static void ad7877_callback(void *_ts) -{ - struct ad7877 *ts = _ts; - - spin_lock_irq(&ts->lock); - - ad7877_rx(ts); - ts->pending = 0; - mod_timer(&ts->timer, jiffies + TS_PEN_UP_TIMEOUT); - - spin_unlock_irq(&ts->lock); -} - static void ad7877_disable(struct ad7877 *ts) { mutex_lock(&ts->mutex); if (!ts->disabled) { - ts->disabled = 1; + ts->disabled = true; disable_irq(ts->spi->irq); - /* Wait for spi_async callback */ - while (ts->pending) - msleep(1); - if (del_timer_sync(&ts->timer)) ad7877_ts_event_release(ts); } - /* we know the chip's in lowpower mode since we always + /* + * We know the chip's in lowpower mode since we always * leave it that way after every request */ @@ -443,7 +446,7 @@ static void ad7877_enable(struct ad7877 *ts) mutex_lock(&ts->mutex); if (ts->disabled) { - ts->disabled = 0; + ts->disabled = false; enable_irq(ts->spi->irq); } @@ -453,7 +456,7 @@ static void ad7877_enable(struct ad7877 *ts) #define SHOW(name) static ssize_t \ name ## _show(struct device *dev, struct device_attribute *attr, char *buf) \ { \ - struct ad7877 *ts = dev_get_drvdata(dev); \ + struct ad7877 *ts = dev_get_drvdata(dev); \ ssize_t v = ad7877_read_adc(ts->spi, \ AD7877_READ_CHAN(name)); \ if (v < 0) \ @@ -473,7 +476,7 @@ SHOW(temp2) static ssize_t ad7877_disable_show(struct device *dev, struct device_attribute *attr, char *buf) { - struct ad7877 *ts = dev_get_drvdata(dev); + struct ad7877 *ts = dev_get_drvdata(dev); return sprintf(buf, "%u\n", ts->disabled); } @@ -503,7 +506,7 @@ static DEVICE_ATTR(disable, 0664, ad7877_disable_show, ad7877_disable_store); static ssize_t ad7877_dac_show(struct device *dev, struct device_attribute *attr, char *buf) { - struct ad7877 *ts = dev_get_drvdata(dev); + struct ad7877 *ts = dev_get_drvdata(dev); return sprintf(buf, "%u\n", ts->dac); } @@ -533,7 +536,7 @@ static DEVICE_ATTR(dac, 0664, ad7877_dac_show, ad7877_dac_store); static ssize_t ad7877_gpio3_show(struct device *dev, struct device_attribute *attr, char *buf) { - struct ad7877 *ts = dev_get_drvdata(dev); + struct ad7877 *ts = dev_get_drvdata(dev); return sprintf(buf, "%u\n", ts->gpio3); } @@ -564,7 +567,7 @@ static DEVICE_ATTR(gpio3, 0664, ad7877_gpio3_show, ad7877_gpio3_store); static ssize_t ad7877_gpio4_show(struct device *dev, struct device_attribute *attr, char *buf) { - struct ad7877 *ts = dev_get_drvdata(dev); + struct ad7877 *ts = dev_get_drvdata(dev); return sprintf(buf, "%u\n", ts->gpio4); } @@ -597,16 +600,35 @@ static struct attribute *ad7877_attributes[] = { &dev_attr_temp2.attr, &dev_attr_aux1.attr, &dev_attr_aux2.attr, + &dev_attr_aux3.attr, &dev_attr_bat1.attr, &dev_attr_bat2.attr, &dev_attr_disable.attr, &dev_attr_dac.attr, + &dev_attr_gpio3.attr, &dev_attr_gpio4.attr, NULL }; +static mode_t ad7877_attr_is_visible(struct kobject *kobj, + struct attribute *attr, int n) +{ + mode_t mode = attr->mode; + + if (attr == &dev_attr_aux3.attr) { + if (gpio3) + mode = 0; + } else if (attr == &dev_attr_gpio3.attr) { + if (!gpio3) + mode = 0; + } + + return mode; +} + static const struct attribute_group ad7877_attr_group = { - .attrs = ad7877_attributes, + .is_visible = ad7877_attr_is_visible, + .attrs = ad7877_attributes, }; static void ad7877_setup_ts_def_msg(struct spi_device *spi, struct ad7877 *ts) @@ -635,22 +657,25 @@ static void ad7877_setup_ts_def_msg(struct spi_device *spi, struct ad7877 *ts) spi_message_init(m); - m->complete = ad7877_callback; m->context = ts; ts->xfer[0].tx_buf = &ts->cmd_crtl1; ts->xfer[0].len = 2; + ts->xfer[0].cs_change = 1; spi_message_add_tail(&ts->xfer[0], m); ts->xfer[1].tx_buf = &ts->cmd_dummy; /* Send ZERO */ ts->xfer[1].len = 2; + ts->xfer[1].cs_change = 1; spi_message_add_tail(&ts->xfer[1], m); - for (i = 0; i < 11; i++) { + for (i = 0; i < AD7877_NR_SENSE; i++) { ts->xfer[i + 2].rx_buf = &ts->conversion_data[AD7877_SEQ_YPOS + i]; ts->xfer[i + 2].len = 2; + if (i < (AD7877_NR_SENSE - 1)) + ts->xfer[i + 2].cs_change = 1; spi_message_add_tail(&ts->xfer[i + 2], m); } } @@ -718,6 +743,8 @@ static int __devinit ad7877_probe(struct spi_device *spi) input_dev->phys = ts->phys; input_dev->dev.parent = &spi->dev; + __set_bit(EV_KEY, input_dev->evbit); + __set_bit(BTN_TOUCH, input_dev->keybit); __set_bit(EV_ABS, input_dev->evbit); __set_bit(ABS_X, input_dev->absbit); __set_bit(ABS_Y, input_dev->absbit); @@ -752,8 +779,9 @@ static int __devinit ad7877_probe(struct spi_device *spi) /* Request AD7877 /DAV GPIO interrupt */ - err = request_irq(spi->irq, ad7877_irq, IRQF_TRIGGER_FALLING, - spi->dev.driver->name, ts); + err = request_threaded_irq(spi->irq, NULL, ad7877_irq, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + spi->dev.driver->name, ts); if (err) { dev_dbg(&spi->dev, "irq %d busy?\n", spi->irq); goto err_free_mem; @@ -763,20 +791,12 @@ static int __devinit ad7877_probe(struct spi_device *spi) if (err) goto err_free_irq; - err = device_create_file(&spi->dev, - gpio3 ? &dev_attr_gpio3 : &dev_attr_aux3); - if (err) - goto err_remove_attr_group; - err = input_register_device(input_dev); if (err) - goto err_remove_attr; + goto err_remove_attr_group; return 0; -err_remove_attr: - device_remove_file(&spi->dev, - gpio3 ? &dev_attr_gpio3 : &dev_attr_aux3); err_remove_attr_group: sysfs_remove_group(&spi->dev.kobj, &ad7877_attr_group); err_free_irq: @@ -790,11 +810,9 @@ err_free_mem: static int __devexit ad7877_remove(struct spi_device *spi) { - struct ad7877 *ts = dev_get_drvdata(&spi->dev); + struct ad7877 *ts = dev_get_drvdata(&spi->dev); sysfs_remove_group(&spi->dev.kobj, &ad7877_attr_group); - device_remove_file(&spi->dev, - gpio3 ? &dev_attr_gpio3 : &dev_attr_aux3); ad7877_disable(ts); free_irq(ts->spi->irq, ts); diff --git a/drivers/input/touchscreen/ad7879-i2c.c b/drivers/input/touchscreen/ad7879-i2c.c new file mode 100644 index 000000000000..d82a38ee9a3e --- /dev/null +++ b/drivers/input/touchscreen/ad7879-i2c.c @@ -0,0 +1,143 @@ +/* + * AD7879-1/AD7889-1 touchscreen (I2C bus) + * + * Copyright (C) 2008-2010 Michael Hennerich, Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#include <linux/input.h> /* BUS_I2C */ +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/types.h> + +#include "ad7879.h" + +#define AD7879_DEVID 0x79 /* AD7879-1/AD7889-1 */ + +#ifdef CONFIG_PM +static int ad7879_i2c_suspend(struct i2c_client *client, pm_message_t message) +{ + struct ad7879 *ts = i2c_get_clientdata(client); + + ad7879_suspend(ts); + + return 0; +} + +static int ad7879_i2c_resume(struct i2c_client *client) +{ + struct ad7879 *ts = i2c_get_clientdata(client); + + ad7879_resume(ts); + + return 0; +} +#else +# define ad7879_i2c_suspend NULL +# define ad7879_i2c_resume NULL +#endif + +/* All registers are word-sized. + * AD7879 uses a high-byte first convention. + */ +static int ad7879_i2c_read(struct device *dev, u8 reg) +{ + struct i2c_client *client = to_i2c_client(dev); + + return swab16(i2c_smbus_read_word_data(client, reg)); +} + +static int ad7879_i2c_multi_read(struct device *dev, + u8 first_reg, u8 count, u16 *buf) +{ + struct i2c_client *client = to_i2c_client(dev); + u8 idx; + + i2c_smbus_read_i2c_block_data(client, first_reg, count * 2, (u8 *)buf); + + for (idx = 0; idx < count; ++idx) + buf[idx] = swab16(buf[idx]); + + return 0; +} + +static int ad7879_i2c_write(struct device *dev, u8 reg, u16 val) +{ + struct i2c_client *client = to_i2c_client(dev); + + return i2c_smbus_write_word_data(client, reg, swab16(val)); +} + +static const struct ad7879_bus_ops ad7879_i2c_bus_ops = { + .bustype = BUS_I2C, + .read = ad7879_i2c_read, + .multi_read = ad7879_i2c_multi_read, + .write = ad7879_i2c_write, +}; + +static int __devinit ad7879_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct ad7879 *ts; + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_WORD_DATA)) { + dev_err(&client->dev, "SMBUS Word Data not Supported\n"); + return -EIO; + } + + ts = ad7879_probe(&client->dev, AD7879_DEVID, client->irq, + &ad7879_i2c_bus_ops); + if (IS_ERR(ts)) + return PTR_ERR(ts); + + i2c_set_clientdata(client, ts); + + return 0; +} + +static int __devexit ad7879_i2c_remove(struct i2c_client *client) +{ + struct ad7879 *ts = i2c_get_clientdata(client); + + ad7879_remove(ts); + + return 0; +} + +static const struct i2c_device_id ad7879_id[] = { + { "ad7879", 0 }, + { "ad7889", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, ad7879_id); + +static struct i2c_driver ad7879_i2c_driver = { + .driver = { + .name = "ad7879", + .owner = THIS_MODULE, + }, + .probe = ad7879_i2c_probe, + .remove = __devexit_p(ad7879_i2c_remove), + .suspend = ad7879_i2c_suspend, + .resume = ad7879_i2c_resume, + .id_table = ad7879_id, +}; + +static int __init ad7879_i2c_init(void) +{ + return i2c_add_driver(&ad7879_i2c_driver); +} +module_init(ad7879_i2c_init); + +static void __exit ad7879_i2c_exit(void) +{ + i2c_del_driver(&ad7879_i2c_driver); +} +module_exit(ad7879_i2c_exit); + +MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); +MODULE_DESCRIPTION("AD7879(-1) touchscreen I2C bus driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("i2c:ad7879"); diff --git a/drivers/input/touchscreen/ad7879-spi.c b/drivers/input/touchscreen/ad7879-spi.c new file mode 100644 index 000000000000..59c6e68c4325 --- /dev/null +++ b/drivers/input/touchscreen/ad7879-spi.c @@ -0,0 +1,198 @@ +/* + * AD7879/AD7889 touchscreen (SPI bus) + * + * Copyright (C) 2008-2010 Michael Hennerich, Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#include <linux/input.h> /* BUS_SPI */ +#include <linux/spi/spi.h> + +#include "ad7879.h" + +#define AD7879_DEVID 0x7A /* AD7879/AD7889 */ + +#define MAX_SPI_FREQ_HZ 5000000 +#define AD7879_CMD_MAGIC 0xE000 +#define AD7879_CMD_READ (1 << 10) +#define AD7879_CMD(reg) (AD7879_CMD_MAGIC | ((reg) & 0xF)) +#define AD7879_WRITECMD(reg) (AD7879_CMD(reg)) +#define AD7879_READCMD(reg) (AD7879_CMD(reg) | AD7879_CMD_READ) + +#ifdef CONFIG_PM +static int ad7879_spi_suspend(struct spi_device *spi, pm_message_t message) +{ + struct ad7879 *ts = spi_get_drvdata(spi); + + ad7879_suspend(ts); + + return 0; +} + +static int ad7879_spi_resume(struct spi_device *spi) +{ + struct ad7879 *ts = spi_get_drvdata(spi); + + ad7879_resume(ts); + + return 0; +} +#else +# define ad7879_spi_suspend NULL +# define ad7879_spi_resume NULL +#endif + +/* + * ad7879_read/write are only used for initial setup and for sysfs controls. + * The main traffic is done in ad7879_collect(). + */ + +static int ad7879_spi_xfer(struct spi_device *spi, + u16 cmd, u8 count, u16 *tx_buf, u16 *rx_buf) +{ + struct spi_message msg; + struct spi_transfer *xfers; + void *spi_data; + u16 *command; + u16 *_rx_buf = _rx_buf; /* shut gcc up */ + u8 idx; + int ret; + + xfers = spi_data = kzalloc(sizeof(*xfers) * (count + 2), GFP_KERNEL); + if (!spi_data) + return -ENOMEM; + + spi_message_init(&msg); + + command = spi_data; + command[0] = cmd; + if (count == 1) { + /* ad7879_spi_{read,write} gave us buf on stack */ + command[1] = *tx_buf; + tx_buf = &command[1]; + _rx_buf = rx_buf; + rx_buf = &command[2]; + } + + ++xfers; + xfers[0].tx_buf = command; + xfers[0].len = 2; + spi_message_add_tail(&xfers[0], &msg); + ++xfers; + + for (idx = 0; idx < count; ++idx) { + if (rx_buf) + xfers[idx].rx_buf = &rx_buf[idx]; + if (tx_buf) + xfers[idx].tx_buf = &tx_buf[idx]; + xfers[idx].len = 2; + spi_message_add_tail(&xfers[idx], &msg); + } + + ret = spi_sync(spi, &msg); + + if (count == 1) + _rx_buf[0] = command[2]; + + kfree(spi_data); + + return ret; +} + +static int ad7879_spi_multi_read(struct device *dev, + u8 first_reg, u8 count, u16 *buf) +{ + struct spi_device *spi = to_spi_device(dev); + + return ad7879_spi_xfer(spi, AD7879_READCMD(first_reg), count, NULL, buf); +} + +static int ad7879_spi_read(struct device *dev, u8 reg) +{ + struct spi_device *spi = to_spi_device(dev); + u16 ret, dummy; + + return ad7879_spi_xfer(spi, AD7879_READCMD(reg), 1, &dummy, &ret) ? : ret; +} + +static int ad7879_spi_write(struct device *dev, u8 reg, u16 val) +{ + struct spi_device *spi = to_spi_device(dev); + u16 dummy; + + return ad7879_spi_xfer(spi, AD7879_WRITECMD(reg), 1, &val, &dummy); +} + +static const struct ad7879_bus_ops ad7879_spi_bus_ops = { + .bustype = BUS_SPI, + .read = ad7879_spi_read, + .multi_read = ad7879_spi_multi_read, + .write = ad7879_spi_write, +}; + +static int __devinit ad7879_spi_probe(struct spi_device *spi) +{ + struct ad7879 *ts; + int err; + + /* don't exceed max specified SPI CLK frequency */ + if (spi->max_speed_hz > MAX_SPI_FREQ_HZ) { + dev_err(&spi->dev, "SPI CLK %d Hz?\n", spi->max_speed_hz); + return -EINVAL; + } + + spi->bits_per_word = 16; + err = spi_setup(spi); + if (err) { + dev_dbg(&spi->dev, "spi master doesn't support 16 bits/word\n"); + return err; + } + + ts = ad7879_probe(&spi->dev, AD7879_DEVID, spi->irq, &ad7879_spi_bus_ops); + if (IS_ERR(ts)) + return PTR_ERR(ts); + + spi_set_drvdata(spi, ts); + + return 0; +} + +static int __devexit ad7879_spi_remove(struct spi_device *spi) +{ + struct ad7879 *ts = spi_get_drvdata(spi); + + ad7879_remove(ts); + spi_set_drvdata(spi, NULL); + + return 0; +} + +static struct spi_driver ad7879_spi_driver = { + .driver = { + .name = "ad7879", + .bus = &spi_bus_type, + .owner = THIS_MODULE, + }, + .probe = ad7879_spi_probe, + .remove = __devexit_p(ad7879_spi_remove), + .suspend = ad7879_spi_suspend, + .resume = ad7879_spi_resume, +}; + +static int __init ad7879_spi_init(void) +{ + return spi_register_driver(&ad7879_spi_driver); +} +module_init(ad7879_spi_init); + +static void __exit ad7879_spi_exit(void) +{ + spi_unregister_driver(&ad7879_spi_driver); +} +module_exit(ad7879_spi_exit); + +MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); +MODULE_DESCRIPTION("AD7879(-1) touchscreen SPI bus driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("spi:ad7879"); diff --git a/drivers/input/touchscreen/ad7879.c b/drivers/input/touchscreen/ad7879.c index 4b32fb4704cd..bc3b5187f3a3 100644 --- a/drivers/input/touchscreen/ad7879.c +++ b/drivers/input/touchscreen/ad7879.c @@ -1,25 +1,9 @@ /* - * Copyright (C) 2008-2009 Michael Hennerich, Analog Devices Inc. + * AD7879/AD7889 based touchscreen and GPIO driver * - * Description: AD7879/AD7889 based touchscreen, and GPIO driver - * (I2C/SPI Interface) + * Copyright (C) 2008-2010 Michael Hennerich, Analog Devices Inc. * - * Bugs: Enter bugs at http://blackfin.uclinux.org/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * Licensed under the GPL-2 or later. * * History: * Copyright (c) 2005 David Brownell @@ -44,12 +28,12 @@ #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/slab.h> -#include <linux/workqueue.h> #include <linux/spi/spi.h> #include <linux/i2c.h> #include <linux/gpio.h> #include <linux/spi/ad7879.h> +#include "ad7879.h" #define AD7879_REG_ZEROS 0 #define AD7879_REG_CTRL1 1 @@ -120,30 +104,19 @@ enum { #define MAX_12BIT ((1<<12)-1) #define TS_PEN_UP_TIMEOUT msecs_to_jiffies(50) -#if defined(CONFIG_TOUCHSCREEN_AD7879_SPI) || defined(CONFIG_TOUCHSCREEN_AD7879_SPI_MODULE) -#define AD7879_DEVID 0x7A -typedef struct spi_device bus_device; -#elif defined(CONFIG_TOUCHSCREEN_AD7879_I2C) || defined(CONFIG_TOUCHSCREEN_AD7879_I2C_MODULE) -#define AD7879_DEVID 0x79 -typedef struct i2c_client bus_device; -#endif - struct ad7879 { - bus_device *bus; + const struct ad7879_bus_ops *bops; + + struct device *dev; struct input_dev *input; - struct work_struct work; struct timer_list timer; #ifdef CONFIG_GPIOLIB struct gpio_chip gc; -#endif struct mutex mutex; - unsigned disabled:1; /* P: mutex */ - -#if defined(CONFIG_TOUCHSCREEN_AD7879_SPI) || defined(CONFIG_TOUCHSCREEN_AD7879_SPI_MODULE) - struct spi_message msg; - struct spi_transfer xfer[AD7879_NR_SENSE + 1]; - u16 cmd; #endif + unsigned int irq; + bool disabled; /* P: input->mutex */ + bool suspended; /* P: input->mutex */ u16 conversion_data[AD7879_NR_SENSE]; char phys[32]; u8 first_conversion_delay; @@ -156,13 +129,27 @@ struct ad7879 { u16 cmd_crtl1; u16 cmd_crtl2; u16 cmd_crtl3; + int x; + int y; + int Rt; }; -static int ad7879_read(bus_device *, u8); -static int ad7879_write(bus_device *, u8, u16); -static void ad7879_collect(struct ad7879 *); +static int ad7879_read(struct ad7879 *ts, u8 reg) +{ + return ts->bops->read(ts->dev, reg); +} + +static int ad7879_multi_read(struct ad7879 *ts, u8 first_reg, u8 count, u16 *buf) +{ + return ts->bops->multi_read(ts->dev, first_reg, count, buf); +} -static void ad7879_report(struct ad7879 *ts) +static int ad7879_write(struct ad7879 *ts, u8 reg, u16 val) +{ + return ts->bops->write(ts->dev, reg, val); +} + +static int ad7879_report(struct ad7879 *ts) { struct input_dev *input_dev = ts->input; unsigned Rt; @@ -175,12 +162,14 @@ static void ad7879_report(struct ad7879 *ts) /* * The samples processed here are already preprocessed by the AD7879. - * The preprocessing function consists of a median and an averaging filter. - * The combination of these two techniques provides a robust solution, - * discarding the spurious noise in the signal and keeping only the data of interest. - * The size of both filters is programmable. (dev.platform_data, see linux/spi/ad7879.h) - * Other user-programmable conversion controls include variable acquisition time, - * and first conversion delay. Up to 16 averages can be taken per conversion. + * The preprocessing function consists of a median and an averaging + * filter. The combination of these two techniques provides a robust + * solution, discarding the spurious noise in the signal and keeping + * only the data of interest. The size of both filters is + * programmable. (dev.platform_data, see linux/spi/ad7879.h) Other + * user-programmable conversion controls include variable acquisition + * time, and first conversion delay. Up to 16 averages can be taken + * per conversion. */ if (likely(x && z1)) { @@ -189,21 +178,36 @@ static void ad7879_report(struct ad7879 *ts) Rt /= z1; Rt = (Rt + 2047) >> 12; - input_report_abs(input_dev, ABS_X, x); - input_report_abs(input_dev, ABS_Y, y); - input_report_abs(input_dev, ABS_PRESSURE, Rt); - input_sync(input_dev); + /* + * Sample found inconsistent, pressure is beyond + * the maximum. Don't report it to user space. + */ + if (Rt > ts->pressure_max) + return -EINVAL; + + /* + * Note that we delay reporting events by one sample. + * This is done to avoid reporting last sample of the + * touch sequence, which may be incomplete if finger + * leaves the surface before last reading is taken. + */ + if (timer_pending(&ts->timer)) { + /* Touch continues */ + input_report_key(input_dev, BTN_TOUCH, 1); + input_report_abs(input_dev, ABS_X, ts->x); + input_report_abs(input_dev, ABS_Y, ts->y); + input_report_abs(input_dev, ABS_PRESSURE, ts->Rt); + input_sync(input_dev); + } + + ts->x = x; + ts->y = y; + ts->Rt = Rt; + + return 0; } -} - -static void ad7879_work(struct work_struct *work) -{ - struct ad7879 *ts = container_of(work, struct ad7879, work); - /* use keventd context to read the result registers */ - ad7879_collect(ts); - ad7879_report(ts); - mod_timer(&ts->timer, jiffies + TS_PEN_UP_TIMEOUT); + return -EINVAL; } static void ad7879_ts_event_release(struct ad7879 *ts) @@ -211,6 +215,7 @@ static void ad7879_ts_event_release(struct ad7879 *ts) struct input_dev *input_dev = ts->input; input_report_abs(input_dev, ABS_PRESSURE, 0); + input_report_key(input_dev, BTN_TOUCH, 0); input_sync(input_dev); } @@ -225,56 +230,98 @@ static irqreturn_t ad7879_irq(int irq, void *handle) { struct ad7879 *ts = handle; - /* The repeated conversion sequencer controlled by TMR kicked off too fast. - * We ignore the last and process the sample sequence currently in the queue. - * It can't be older than 9.4ms - */ + ad7879_multi_read(ts, AD7879_REG_XPLUS, AD7879_NR_SENSE, ts->conversion_data); - if (!work_pending(&ts->work)) - schedule_work(&ts->work); + if (!ad7879_report(ts)) + mod_timer(&ts->timer, jiffies + TS_PEN_UP_TIMEOUT); return IRQ_HANDLED; } -static void ad7879_setup(struct ad7879 *ts) +static void __ad7879_enable(struct ad7879 *ts) { - ad7879_write(ts->bus, AD7879_REG_CTRL2, ts->cmd_crtl2); - ad7879_write(ts->bus, AD7879_REG_CTRL3, ts->cmd_crtl3); - ad7879_write(ts->bus, AD7879_REG_CTRL1, ts->cmd_crtl1); + ad7879_write(ts, AD7879_REG_CTRL2, ts->cmd_crtl2); + ad7879_write(ts, AD7879_REG_CTRL3, ts->cmd_crtl3); + ad7879_write(ts, AD7879_REG_CTRL1, ts->cmd_crtl1); + + enable_irq(ts->irq); } -static void ad7879_disable(struct ad7879 *ts) +static void __ad7879_disable(struct ad7879 *ts) { - mutex_lock(&ts->mutex); + disable_irq(ts->irq); - if (!ts->disabled) { + if (del_timer_sync(&ts->timer)) + ad7879_ts_event_release(ts); - ts->disabled = 1; - disable_irq(ts->bus->irq); + ad7879_write(ts, AD7879_REG_CTRL2, AD7879_PM(AD7879_PM_SHUTDOWN)); +} - cancel_work_sync(&ts->work); - if (del_timer_sync(&ts->timer)) - ad7879_ts_event_release(ts); +static int ad7879_open(struct input_dev *input) +{ + struct ad7879 *ts = input_get_drvdata(input); - ad7879_write(ts->bus, AD7879_REG_CTRL2, - AD7879_PM(AD7879_PM_SHUTDOWN)); - } + /* protected by input->mutex */ + if (!ts->disabled && !ts->suspended) + __ad7879_enable(ts); - mutex_unlock(&ts->mutex); + return 0; } -static void ad7879_enable(struct ad7879 *ts) +static void ad7879_close(struct input_dev* input) { - mutex_lock(&ts->mutex); + struct ad7879 *ts = input_get_drvdata(input); + + /* protected by input->mutex */ + if (!ts->disabled && !ts->suspended) + __ad7879_disable(ts); +} + +void ad7879_suspend(struct ad7879 *ts) +{ + mutex_lock(&ts->input->mutex); + + if (!ts->suspended && !ts->disabled && ts->input->users) + __ad7879_disable(ts); + + ts->suspended = true; + + mutex_unlock(&ts->input->mutex); +} +EXPORT_SYMBOL(ad7879_suspend); + +void ad7879_resume(struct ad7879 *ts) +{ + mutex_lock(&ts->input->mutex); - if (ts->disabled) { - ad7879_setup(ts); - ts->disabled = 0; - enable_irq(ts->bus->irq); + if (ts->suspended && !ts->disabled && ts->input->users) + __ad7879_enable(ts); + + ts->suspended = false; + + mutex_unlock(&ts->input->mutex); +} +EXPORT_SYMBOL(ad7879_resume); + +static void ad7879_toggle(struct ad7879 *ts, bool disable) +{ + mutex_lock(&ts->input->mutex); + + if (!ts->suspended && ts->input->users != 0) { + + if (disable) { + if (ts->disabled) + __ad7879_enable(ts); + } else { + if (!ts->disabled) + __ad7879_disable(ts); + } } - mutex_unlock(&ts->mutex); + ts->disabled = disable; + + mutex_unlock(&ts->input->mutex); } static ssize_t ad7879_disable_show(struct device *dev, @@ -297,10 +344,7 @@ static ssize_t ad7879_disable_store(struct device *dev, if (error) return error; - if (val) - ad7879_disable(ts); - else - ad7879_enable(ts); + ad7879_toggle(ts, val); return count; } @@ -325,7 +369,7 @@ static int ad7879_gpio_direction_input(struct gpio_chip *chip, mutex_lock(&ts->mutex); ts->cmd_crtl2 |= AD7879_GPIO_EN | AD7879_GPIODIR | AD7879_GPIOPOL; - err = ad7879_write(ts->bus, AD7879_REG_CTRL2, ts->cmd_crtl2); + err = ad7879_write(ts, AD7879_REG_CTRL2, ts->cmd_crtl2); mutex_unlock(&ts->mutex); return err; @@ -345,7 +389,7 @@ static int ad7879_gpio_direction_output(struct gpio_chip *chip, else ts->cmd_crtl2 &= ~AD7879_GPIO_DATA; - err = ad7879_write(ts->bus, AD7879_REG_CTRL2, ts->cmd_crtl2); + err = ad7879_write(ts, AD7879_REG_CTRL2, ts->cmd_crtl2); mutex_unlock(&ts->mutex); return err; @@ -357,7 +401,7 @@ static int ad7879_gpio_get_value(struct gpio_chip *chip, unsigned gpio) u16 val; mutex_lock(&ts->mutex); - val = ad7879_read(ts->bus, AD7879_REG_CTRL2); + val = ad7879_read(ts, AD7879_REG_CTRL2); mutex_unlock(&ts->mutex); return !!(val & AD7879_GPIO_DATA); @@ -374,16 +418,17 @@ static void ad7879_gpio_set_value(struct gpio_chip *chip, else ts->cmd_crtl2 &= ~AD7879_GPIO_DATA; - ad7879_write(ts->bus, AD7879_REG_CTRL2, ts->cmd_crtl2); + ad7879_write(ts, AD7879_REG_CTRL2, ts->cmd_crtl2); mutex_unlock(&ts->mutex); } -static int __devinit ad7879_gpio_add(struct device *dev) +static int ad7879_gpio_add(struct ad7879 *ts, + const struct ad7879_platform_data *pdata) { - struct ad7879 *ts = dev_get_drvdata(dev); - struct ad7879_platform_data *pdata = dev->platform_data; int ret = 0; + mutex_init(&ts->mutex); + if (pdata->gpio_export) { ts->gc.direction_input = ad7879_gpio_direction_input; ts->gc.direction_output = ad7879_gpio_direction_output; @@ -394,72 +439,75 @@ static int __devinit ad7879_gpio_add(struct device *dev) ts->gc.ngpio = 1; ts->gc.label = "AD7879-GPIO"; ts->gc.owner = THIS_MODULE; - ts->gc.dev = dev; + ts->gc.dev = ts->dev; ret = gpiochip_add(&ts->gc); if (ret) - dev_err(dev, "failed to register gpio %d\n", + dev_err(ts->dev, "failed to register gpio %d\n", ts->gc.base); } return ret; } -/* - * We mark ad7879_gpio_remove inline so there is a chance the code - * gets discarded when not needed. We can't do __devinit/__devexit - * markup since it is used in both probe and remove methods. - */ -static inline void ad7879_gpio_remove(struct device *dev) +static void ad7879_gpio_remove(struct ad7879 *ts) { - struct ad7879 *ts = dev_get_drvdata(dev); - struct ad7879_platform_data *pdata = dev->platform_data; + const struct ad7879_platform_data *pdata = ts->dev->platform_data; int ret; if (pdata->gpio_export) { ret = gpiochip_remove(&ts->gc); if (ret) - dev_err(dev, "failed to remove gpio %d\n", + dev_err(ts->dev, "failed to remove gpio %d\n", ts->gc.base); } } #else -static inline int ad7879_gpio_add(struct device *dev) +static inline int ad7879_gpio_add(struct ad7879 *ts, + const struct ad7879_platform_data *pdata) { return 0; } -static inline void ad7879_gpio_remove(struct device *dev) +static inline void ad7879_gpio_remove(struct ad7879 *ts) { } #endif -static int __devinit ad7879_construct(bus_device *bus, struct ad7879 *ts) +struct ad7879 *ad7879_probe(struct device *dev, u8 devid, unsigned int irq, + const struct ad7879_bus_ops *bops) { + struct ad7879_platform_data *pdata = dev->platform_data; + struct ad7879 *ts; struct input_dev *input_dev; - struct ad7879_platform_data *pdata = bus->dev.platform_data; int err; u16 revid; - if (!bus->irq) { - dev_err(&bus->dev, "no IRQ?\n"); - return -ENODEV; + if (!irq) { + dev_err(dev, "no IRQ?\n"); + err = -EINVAL; + goto err_out; } if (!pdata) { - dev_err(&bus->dev, "no platform data?\n"); - return -ENODEV; + dev_err(dev, "no platform data?\n"); + err = -EINVAL; + goto err_out; } + ts = kzalloc(sizeof(*ts), GFP_KERNEL); input_dev = input_allocate_device(); - if (!input_dev) - return -ENOMEM; + if (!ts || !input_dev) { + err = -ENOMEM; + goto err_free_mem; + } + ts->bops = bops; + ts->dev = dev; ts->input = input_dev; + ts->irq = irq; setup_timer(&ts->timer, ad7879_timer, (unsigned long) ts); - INIT_WORK(&ts->work, ad7879_work); - mutex_init(&ts->mutex); ts->x_plate_ohms = pdata->x_plate_ohms ? : 400; ts->pressure_max = pdata->pressure_max ? : ~0; @@ -470,17 +518,26 @@ static int __devinit ad7879_construct(bus_device *bus, struct ad7879 *ts) ts->pen_down_acc_interval = pdata->pen_down_acc_interval; ts->median = pdata->median; - snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(&bus->dev)); + snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(dev)); input_dev->name = "AD7879 Touchscreen"; input_dev->phys = ts->phys; - input_dev->dev.parent = &bus->dev; + input_dev->dev.parent = dev; + input_dev->id.bustype = bops->bustype; + + input_dev->open = ad7879_open; + input_dev->close = ad7879_close; + + input_set_drvdata(input_dev, ts); __set_bit(EV_ABS, input_dev->evbit); __set_bit(ABS_X, input_dev->absbit); __set_bit(ABS_Y, input_dev->absbit); __set_bit(ABS_PRESSURE, input_dev->absbit); + __set_bit(EV_KEY, input_dev->evbit); + __set_bit(BTN_TOUCH, input_dev->keybit); + input_set_abs_params(input_dev, ABS_X, pdata->x_min ? : 0, pdata->x_max ? : MAX_12BIT, @@ -492,17 +549,18 @@ static int __devinit ad7879_construct(bus_device *bus, struct ad7879 *ts) input_set_abs_params(input_dev, ABS_PRESSURE, pdata->pressure_min, pdata->pressure_max, 0, 0); - err = ad7879_write(bus, AD7879_REG_CTRL2, AD7879_RESET); - + err = ad7879_write(ts, AD7879_REG_CTRL2, AD7879_RESET); if (err < 0) { - dev_err(&bus->dev, "Failed to write %s\n", input_dev->name); + dev_err(dev, "Failed to write %s\n", input_dev->name); goto err_free_mem; } - revid = ad7879_read(bus, AD7879_REG_REVID); - - if ((revid & 0xFF) != AD7879_DEVID) { - dev_err(&bus->dev, "Failed to probe %s\n", input_dev->name); + revid = ad7879_read(ts, AD7879_REG_REVID); + input_dev->id.product = (revid & 0xff); + input_dev->id.version = revid >> 8; + if (input_dev->id.product != devid) { + dev_err(dev, "Failed to probe %s (%x vs %x)\n", + input_dev->name, devid, revid); err = -ENODEV; goto err_free_mem; } @@ -524,21 +582,21 @@ static int __devinit ad7879_construct(bus_device *bus, struct ad7879 *ts) AD7879_ACQ(ts->acquisition_time) | AD7879_TMR(ts->pen_down_acc_interval); - ad7879_setup(ts); - - err = request_irq(bus->irq, ad7879_irq, - IRQF_TRIGGER_FALLING, bus->dev.driver->name, ts); - + err = request_threaded_irq(ts->irq, NULL, ad7879_irq, + IRQF_TRIGGER_FALLING, + dev_name(dev), ts); if (err) { - dev_err(&bus->dev, "irq %d busy?\n", bus->irq); + dev_err(dev, "irq %d busy?\n", ts->irq); goto err_free_mem; } - err = sysfs_create_group(&bus->dev.kobj, &ad7879_attr_group); + __ad7879_disable(ts); + + err = sysfs_create_group(&dev->kobj, &ad7879_attr_group); if (err) goto err_free_irq; - err = ad7879_gpio_add(&bus->dev); + err = ad7879_gpio_add(ts, pdata); if (err) goto err_remove_attr; @@ -546,321 +604,32 @@ static int __devinit ad7879_construct(bus_device *bus, struct ad7879 *ts) if (err) goto err_remove_gpio; - dev_info(&bus->dev, "Rev.%d touchscreen, irq %d\n", - revid >> 8, bus->irq); - - return 0; + return ts; err_remove_gpio: - ad7879_gpio_remove(&bus->dev); + ad7879_gpio_remove(ts); err_remove_attr: - sysfs_remove_group(&bus->dev.kobj, &ad7879_attr_group); + sysfs_remove_group(&dev->kobj, &ad7879_attr_group); err_free_irq: - free_irq(bus->irq, ts); + free_irq(ts->irq, ts); err_free_mem: input_free_device(input_dev); - - return err; -} - -static int __devexit ad7879_destroy(bus_device *bus, struct ad7879 *ts) -{ - ad7879_gpio_remove(&bus->dev); - ad7879_disable(ts); - sysfs_remove_group(&ts->bus->dev.kobj, &ad7879_attr_group); - free_irq(ts->bus->irq, ts); - input_unregister_device(ts->input); - dev_dbg(&bus->dev, "unregistered touchscreen\n"); - - return 0; -} - -#ifdef CONFIG_PM -static int ad7879_suspend(bus_device *bus, pm_message_t message) -{ - struct ad7879 *ts = dev_get_drvdata(&bus->dev); - - ad7879_disable(ts); - - return 0; -} - -static int ad7879_resume(bus_device *bus) -{ - struct ad7879 *ts = dev_get_drvdata(&bus->dev); - - ad7879_enable(ts); - - return 0; -} -#else -#define ad7879_suspend NULL -#define ad7879_resume NULL -#endif - -#if defined(CONFIG_TOUCHSCREEN_AD7879_SPI) || defined(CONFIG_TOUCHSCREEN_AD7879_SPI_MODULE) -#define MAX_SPI_FREQ_HZ 5000000 -#define AD7879_CMD_MAGIC 0xE000 -#define AD7879_CMD_READ (1 << 10) -#define AD7879_WRITECMD(reg) (AD7879_CMD_MAGIC | (reg & 0xF)) -#define AD7879_READCMD(reg) (AD7879_CMD_MAGIC | AD7879_CMD_READ | (reg & 0xF)) - -struct ser_req { - u16 command; - u16 data; - struct spi_message msg; - struct spi_transfer xfer[2]; -}; - -/* - * ad7879_read/write are only used for initial setup and for sysfs controls. - * The main traffic is done in ad7879_collect(). - */ - -static int ad7879_read(struct spi_device *spi, u8 reg) -{ - struct ser_req *req; - int status, ret; - - req = kzalloc(sizeof *req, GFP_KERNEL); - if (!req) - return -ENOMEM; - - spi_message_init(&req->msg); - - req->command = (u16) AD7879_READCMD(reg); - req->xfer[0].tx_buf = &req->command; - req->xfer[0].len = 2; - - req->xfer[1].rx_buf = &req->data; - req->xfer[1].len = 2; - - spi_message_add_tail(&req->xfer[0], &req->msg); - spi_message_add_tail(&req->xfer[1], &req->msg); - - status = spi_sync(spi, &req->msg); - ret = status ? : req->data; - - kfree(req); - - return ret; -} - -static int ad7879_write(struct spi_device *spi, u8 reg, u16 val) -{ - struct ser_req *req; - int status; - - req = kzalloc(sizeof *req, GFP_KERNEL); - if (!req) - return -ENOMEM; - - spi_message_init(&req->msg); - - req->command = (u16) AD7879_WRITECMD(reg); - req->xfer[0].tx_buf = &req->command; - req->xfer[0].len = 2; - - req->data = val; - req->xfer[1].tx_buf = &req->data; - req->xfer[1].len = 2; - - spi_message_add_tail(&req->xfer[0], &req->msg); - spi_message_add_tail(&req->xfer[1], &req->msg); - - status = spi_sync(spi, &req->msg); - - kfree(req); - - return status; -} - -static void ad7879_collect(struct ad7879 *ts) -{ - int status = spi_sync(ts->bus, &ts->msg); - - if (status) - dev_err(&ts->bus->dev, "spi_sync --> %d\n", status); -} - -static void ad7879_setup_ts_def_msg(struct ad7879 *ts) -{ - struct spi_message *m; - int i; - - ts->cmd = (u16) AD7879_READCMD(AD7879_REG_XPLUS); - - m = &ts->msg; - spi_message_init(m); - ts->xfer[0].tx_buf = &ts->cmd; - ts->xfer[0].len = 2; - - spi_message_add_tail(&ts->xfer[0], m); - - for (i = 0; i < AD7879_NR_SENSE; i++) { - ts->xfer[i + 1].rx_buf = &ts->conversion_data[i]; - ts->xfer[i + 1].len = 2; - spi_message_add_tail(&ts->xfer[i + 1], m); - } -} - -static int __devinit ad7879_probe(struct spi_device *spi) -{ - struct ad7879 *ts; - int error; - - /* don't exceed max specified SPI CLK frequency */ - if (spi->max_speed_hz > MAX_SPI_FREQ_HZ) { - dev_err(&spi->dev, "SPI CLK %d Hz?\n", spi->max_speed_hz); - return -EINVAL; - } - - ts = kzalloc(sizeof(struct ad7879), GFP_KERNEL); - if (!ts) - return -ENOMEM; - - dev_set_drvdata(&spi->dev, ts); - ts->bus = spi; - - ad7879_setup_ts_def_msg(ts); - - error = ad7879_construct(spi, ts); - if (error) { - dev_set_drvdata(&spi->dev, NULL); - kfree(ts); - } - - return error; -} - -static int __devexit ad7879_remove(struct spi_device *spi) -{ - struct ad7879 *ts = dev_get_drvdata(&spi->dev); - - ad7879_destroy(spi, ts); - dev_set_drvdata(&spi->dev, NULL); kfree(ts); - - return 0; +err_out: + return ERR_PTR(err); } +EXPORT_SYMBOL(ad7879_probe); -static struct spi_driver ad7879_driver = { - .driver = { - .name = "ad7879", - .bus = &spi_bus_type, - .owner = THIS_MODULE, - }, - .probe = ad7879_probe, - .remove = __devexit_p(ad7879_remove), - .suspend = ad7879_suspend, - .resume = ad7879_resume, -}; - -static int __init ad7879_init(void) -{ - return spi_register_driver(&ad7879_driver); -} -module_init(ad7879_init); - -static void __exit ad7879_exit(void) -{ - spi_unregister_driver(&ad7879_driver); -} -module_exit(ad7879_exit); - -#elif defined(CONFIG_TOUCHSCREEN_AD7879_I2C) || defined(CONFIG_TOUCHSCREEN_AD7879_I2C_MODULE) - -/* All registers are word-sized. - * AD7879 uses a high-byte first convention. - */ -static int ad7879_read(struct i2c_client *client, u8 reg) +void ad7879_remove(struct ad7879 *ts) { - return swab16(i2c_smbus_read_word_data(client, reg)); -} - -static int ad7879_write(struct i2c_client *client, u8 reg, u16 val) -{ - return i2c_smbus_write_word_data(client, reg, swab16(val)); -} - -static void ad7879_collect(struct ad7879 *ts) -{ - int i; - - for (i = 0; i < AD7879_NR_SENSE; i++) - ts->conversion_data[i] = ad7879_read(ts->bus, - AD7879_REG_XPLUS + i); -} - -static int __devinit ad7879_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - struct ad7879 *ts; - int error; - - if (!i2c_check_functionality(client->adapter, - I2C_FUNC_SMBUS_WORD_DATA)) { - dev_err(&client->dev, "SMBUS Word Data not Supported\n"); - return -EIO; - } - - ts = kzalloc(sizeof(struct ad7879), GFP_KERNEL); - if (!ts) - return -ENOMEM; - - i2c_set_clientdata(client, ts); - ts->bus = client; - - error = ad7879_construct(client, ts); - if (error) - kfree(ts); - - return error; -} - -static int __devexit ad7879_remove(struct i2c_client *client) -{ - struct ad7879 *ts = dev_get_drvdata(&client->dev); - - ad7879_destroy(client, ts); + ad7879_gpio_remove(ts); + sysfs_remove_group(&ts->dev->kobj, &ad7879_attr_group); + free_irq(ts->irq, ts); + input_unregister_device(ts->input); kfree(ts); - - return 0; -} - -static const struct i2c_device_id ad7879_id[] = { - { "ad7879", 0 }, - { "ad7889", 0 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, ad7879_id); - -static struct i2c_driver ad7879_driver = { - .driver = { - .name = "ad7879", - .owner = THIS_MODULE, - }, - .probe = ad7879_probe, - .remove = __devexit_p(ad7879_remove), - .suspend = ad7879_suspend, - .resume = ad7879_resume, - .id_table = ad7879_id, -}; - -static int __init ad7879_init(void) -{ - return i2c_add_driver(&ad7879_driver); -} -module_init(ad7879_init); - -static void __exit ad7879_exit(void) -{ - i2c_del_driver(&ad7879_driver); } -module_exit(ad7879_exit); -#endif +EXPORT_SYMBOL(ad7879_remove); MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); MODULE_DESCRIPTION("AD7879(-1) touchscreen Driver"); MODULE_LICENSE("GPL"); -MODULE_ALIAS("spi:ad7879"); diff --git a/drivers/input/touchscreen/ad7879.h b/drivers/input/touchscreen/ad7879.h new file mode 100644 index 000000000000..6b45a27236c7 --- /dev/null +++ b/drivers/input/touchscreen/ad7879.h @@ -0,0 +1,30 @@ +/* + * AD7879/AD7889 touchscreen (bus interfaces) + * + * Copyright (C) 2008-2010 Michael Hennerich, Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#ifndef _AD7879_H_ +#define _AD7879_H_ + +#include <linux/types.h> + +struct ad7879; +struct device; + +struct ad7879_bus_ops { + u16 bustype; + int (*read)(struct device *dev, u8 reg); + int (*multi_read)(struct device *dev, u8 first_reg, u8 count, u16 *buf); + int (*write)(struct device *dev, u8 reg, u16 val); +}; + +void ad7879_suspend(struct ad7879 *); +void ad7879_resume(struct ad7879 *); +struct ad7879 *ad7879_probe(struct device *dev, u8 devid, unsigned irq, + const struct ad7879_bus_ops *bops); +void ad7879_remove(struct ad7879 *); + +#endif diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c index a9fdf55c0238..14ea54b78e46 100644 --- a/drivers/input/touchscreen/ads7846.c +++ b/drivers/input/touchscreen/ads7846.c @@ -17,9 +17,11 @@ * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ +#include <linux/types.h> #include <linux/hwmon.h> #include <linux/init.h> #include <linux/err.h> +#include <linux/sched.h> #include <linux/delay.h> #include <linux/input.h> #include <linux/interrupt.h> @@ -52,22 +54,25 @@ * files. */ -#define TS_POLL_DELAY (1 * 1000000) /* ns delay before the first sample */ -#define TS_POLL_PERIOD (5 * 1000000) /* ns delay between samples */ +#define TS_POLL_DELAY 1 /* ms delay before the first sample */ +#define TS_POLL_PERIOD 5 /* ms delay between samples */ /* this driver doesn't aim at the peak continuous sample rate */ #define SAMPLE_BITS (8 /*cmd*/ + 16 /*sample*/ + 2 /* before, after */) struct ts_event { - /* For portability, we can't read 12 bit values using SPI (which - * would make the controller deliver them as native byteorder u16 + /* + * For portability, we can't read 12 bit values using SPI (which + * would make the controller deliver them as native byte order u16 * with msbs zeroed). Instead, we read them as two 8-bit values, * *** WHICH NEED BYTESWAPPING *** and range adjustment. */ u16 x; u16 y; u16 z1, z2; - int ignore; + bool ignore; + u8 x_buf[3]; + u8 y_buf[3]; }; /* @@ -79,6 +84,8 @@ struct ads7846_packet { u8 read_x, read_y, read_z1, read_z2, pwrdown; u16 dummy; /* for the pwrdown read */ struct ts_event tc; + /* for ads7845 with mpc5121 psc spi we use 3-byte buffers */ + u8 read_x_cmd[3], read_y_cmd[3], pwrdown_cmd[3]; }; struct ads7846 { @@ -106,8 +113,11 @@ struct ads7846 { struct spi_transfer xfer[18]; struct spi_message msg[5]; - struct spi_message *last_msg; - int msg_idx; + int msg_count; + wait_queue_head_t wait; + + bool pendown; + int read_cnt; int read_rep; int last_read; @@ -118,14 +128,10 @@ struct ads7846 { u16 penirq_recheck_delay_usecs; - spinlock_t lock; - struct hrtimer timer; - unsigned pendown:1; /* P: lock */ - unsigned pending:1; /* P: lock */ -// FIXME remove "irq_disabled" - unsigned irq_disabled:1; /* P: lock */ - unsigned disabled:1; - unsigned is_suspended:1; + struct mutex lock; + bool stopped; /* P: lock */ + bool disabled; /* P: lock */ + bool suspended; /* P: lock */ int (*filter)(void *data, int data_idx, int *val); void *filter_data; @@ -161,7 +167,7 @@ struct ads7846 { #define ADS_12_BIT (0 << 3) #define ADS_SER (1 << 2) /* non-differential */ #define ADS_DFR (0 << 2) /* differential */ -#define ADS_PD10_PDOWN (0 << 0) /* lowpower mode + penirq */ +#define ADS_PD10_PDOWN (0 << 0) /* low power mode + penirq */ #define ADS_PD10_ADC_ON (1 << 0) /* ADC on */ #define ADS_PD10_REF_ON (2 << 0) /* vREF on + penirq */ #define ADS_PD10_ALL_ON (3 << 0) /* ADC + vREF on */ @@ -189,6 +195,78 @@ struct ads7846 { #define REF_ON (READ_12BIT_DFR(x, 1, 1)) #define REF_OFF (READ_12BIT_DFR(y, 0, 0)) +/* Must be called with ts->lock held */ +static void ads7846_stop(struct ads7846 *ts) +{ + if (!ts->disabled && !ts->suspended) { + /* Signal IRQ thread to stop polling and disable the handler. */ + ts->stopped = true; + mb(); + wake_up(&ts->wait); + disable_irq(ts->spi->irq); + } +} + +/* Must be called with ts->lock held */ +static void ads7846_restart(struct ads7846 *ts) +{ + if (!ts->disabled && !ts->suspended) { + /* Tell IRQ thread that it may poll the device. */ + ts->stopped = false; + mb(); + enable_irq(ts->spi->irq); + } +} + +/* Must be called with ts->lock held */ +static void __ads7846_disable(struct ads7846 *ts) +{ + ads7846_stop(ts); + regulator_disable(ts->reg); + + /* + * We know the chip's in low power mode since we always + * leave it that way after every request + */ +} + +/* Must be called with ts->lock held */ +static void __ads7846_enable(struct ads7846 *ts) +{ + regulator_enable(ts->reg); + ads7846_restart(ts); +} + +static void ads7846_disable(struct ads7846 *ts) +{ + mutex_lock(&ts->lock); + + if (!ts->disabled) { + + if (!ts->suspended) + __ads7846_disable(ts); + + ts->disabled = true; + } + + mutex_unlock(&ts->lock); +} + +static void ads7846_enable(struct ads7846 *ts) +{ + mutex_lock(&ts->lock); + + if (ts->disabled) { + + ts->disabled = false; + + if (!ts->suspended) + __ads7846_enable(ts); + } + + mutex_unlock(&ts->lock); +} + /*--------------------------------------------------------------------------*/ /* @@ -207,23 +285,23 @@ struct ser_req { struct spi_transfer xfer[6]; }; -static void ads7846_enable(struct ads7846 *ts); -static void ads7846_disable(struct ads7846 *ts); - -static int device_suspended(struct device *dev) -{ - struct ads7846 *ts = dev_get_drvdata(dev); - return ts->is_suspended || ts->disabled; -} +struct ads7845_ser_req { + u8 command[3]; + u8 pwrdown[3]; + u8 sample[3]; + struct spi_message msg; + struct spi_transfer xfer[2]; +}; static int ads7846_read12_ser(struct device *dev, unsigned command) { - struct spi_device *spi = to_spi_device(dev); - struct ads7846 *ts = dev_get_drvdata(dev); - struct ser_req *req = kzalloc(sizeof *req, GFP_KERNEL); - int status; - int use_internal; + struct spi_device *spi = to_spi_device(dev); + struct ads7846 *ts = dev_get_drvdata(dev); + struct ser_req *req; + int status; + int use_internal; + req = kzalloc(sizeof *req, GFP_KERNEL); if (!req) return -ENOMEM; @@ -270,11 +348,11 @@ static int ads7846_read12_ser(struct device *dev, unsigned command) CS_CHANGE(req->xfer[5]); spi_message_add_tail(&req->xfer[5], &req->msg); - ts->irq_disabled = 1; - disable_irq(spi->irq); + mutex_lock(&ts->lock); + ads7846_stop(ts); status = spi_sync(spi, &req->msg); - ts->irq_disabled = 0; - enable_irq(spi->irq); + ads7846_restart(ts); + mutex_unlock(&ts->lock); if (status == 0) { /* on-wire is a must-ignore bit, a BE12 value, then padding */ @@ -287,6 +365,42 @@ static int ads7846_read12_ser(struct device *dev, unsigned command) return status; } +static int ads7845_read12_ser(struct device *dev, unsigned command) +{ + struct spi_device *spi = to_spi_device(dev); + struct ads7846 *ts = dev_get_drvdata(dev); + struct ads7845_ser_req *req; + int status; + + req = kzalloc(sizeof *req, GFP_KERNEL); + if (!req) + return -ENOMEM; + + spi_message_init(&req->msg); + + req->command[0] = (u8) command; + req->xfer[0].tx_buf = req->command; + req->xfer[0].rx_buf = req->sample; + req->xfer[0].len = 3; + spi_message_add_tail(&req->xfer[0], &req->msg); + + mutex_lock(&ts->lock); + ads7846_stop(ts); + status = spi_sync(spi, &req->msg); + ads7846_restart(ts); + mutex_unlock(&ts->lock); + + if (status == 0) { + /* BE12 value, then padding */ + status = be16_to_cpu(*((u16 *)&req->sample[1])); + status = status >> 3; + status &= 0x0fff; + } + + kfree(req); + return status; +} + #if defined(CONFIG_HWMON) || defined(CONFIG_HWMON_MODULE) #define SHOW(name, var, adjust) static ssize_t \ @@ -327,6 +441,7 @@ static inline unsigned vaux_adjust(struct ads7846 *ts, ssize_t v) /* external resistors may scale vAUX into 0..vREF */ retval *= ts->vref_mv; retval = retval >> 12; + return retval; } @@ -337,13 +452,13 @@ static inline unsigned vbatt_adjust(struct ads7846 *ts, ssize_t v) /* ads7846 has a resistor ladder to scale this signal down */ if (ts->model == 7846) retval *= 4; + return retval; } SHOW(in0_input, vaux, vaux_adjust) SHOW(in1_input, vbatt, vbatt_adjust) - static struct attribute *ads7846_attributes[] = { &dev_attr_temp0.attr, &dev_attr_temp1.attr, @@ -451,17 +566,12 @@ static inline void ads784x_hwmon_unregister(struct spi_device *spi, } #endif -static int is_pen_down(struct device *dev) -{ - struct ads7846 *ts = dev_get_drvdata(dev); - - return ts->pendown; -} - static ssize_t ads7846_pen_down_show(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "%u\n", is_pen_down(dev)); + struct ads7846 *ts = dev_get_drvdata(dev); + + return sprintf(buf, "%u\n", ts->pendown); } static DEVICE_ATTR(pen_down, S_IRUGO, ads7846_pen_down_show, NULL); @@ -469,7 +579,7 @@ static DEVICE_ATTR(pen_down, S_IRUGO, ads7846_pen_down_show, NULL); static ssize_t ads7846_disable_show(struct device *dev, struct device_attribute *attr, char *buf) { - struct ads7846 *ts = dev_get_drvdata(dev); + struct ads7846 *ts = dev_get_drvdata(dev); return sprintf(buf, "%u\n", ts->disabled); } @@ -484,15 +594,11 @@ static ssize_t ads7846_disable_store(struct device *dev, if (strict_strtoul(buf, 10, &i)) return -EINVAL; - spin_lock_irq(&ts->lock); - if (i) ads7846_disable(ts); else ads7846_enable(ts); - spin_unlock_irq(&ts->lock); - return count; } @@ -522,28 +628,153 @@ static void null_wait_for_sync(void) { } -/* - * PENIRQ only kicks the timer. The timer only reissues the SPI transfer, - * to retrieve touchscreen status. - * - * The SPI transfer completion callback does the real work. It reports - * touchscreen events and reactivates the timer (or IRQ) as appropriate. - */ +static int ads7846_debounce_filter(void *ads, int data_idx, int *val) +{ + struct ads7846 *ts = ads; + + if (!ts->read_cnt || (abs(ts->last_read - *val) > ts->debounce_tol)) { + /* Start over collecting consistent readings. */ + ts->read_rep = 0; + /* + * Repeat it, if this was the first read or the read + * wasn't consistent enough. + */ + if (ts->read_cnt < ts->debounce_max) { + ts->last_read = *val; + ts->read_cnt++; + return ADS7846_FILTER_REPEAT; + } else { + /* + * Maximum number of debouncing reached and still + * not enough number of consistent readings. Abort + * the whole sample, repeat it in the next sampling + * period. + */ + ts->read_cnt = 0; + return ADS7846_FILTER_IGNORE; + } + } else { + if (++ts->read_rep > ts->debounce_rep) { + /* + * Got a good reading for this coordinate, + * go for the next one. + */ + ts->read_cnt = 0; + ts->read_rep = 0; + return ADS7846_FILTER_OK; + } else { + /* Read more values that are consistent. */ + ts->read_cnt++; + return ADS7846_FILTER_REPEAT; + } + } +} + +static int ads7846_no_filter(void *ads, int data_idx, int *val) +{ + return ADS7846_FILTER_OK; +} + +static int ads7846_get_value(struct ads7846 *ts, struct spi_message *m) +{ + struct spi_transfer *t = + list_entry(m->transfers.prev, struct spi_transfer, transfer_list); + + if (ts->model == 7845) { + return be16_to_cpup((__be16 *)&(((char*)t->rx_buf)[1])) >> 3; + } else { + /* + * adjust: on-wire is a must-ignore bit, a BE12 value, then + * padding; built from two 8 bit values written msb-first. + */ + return be16_to_cpup((__be16 *)t->rx_buf) >> 3; + } +} + +static void ads7846_update_value(struct spi_message *m, int val) +{ + struct spi_transfer *t = + list_entry(m->transfers.prev, struct spi_transfer, transfer_list); + + *(u16 *)t->rx_buf = val; +} + +static void ads7846_read_state(struct ads7846 *ts) +{ + struct ads7846_packet *packet = ts->packet; + struct spi_message *m; + int msg_idx = 0; + int val; + int action; + int error; + + while (msg_idx < ts->msg_count) { + + ts->wait_for_sync(); + + m = &ts->msg[msg_idx]; + error = spi_sync(ts->spi, m); + if (error) { + dev_err(&ts->spi->dev, "spi_async --> %d\n", error); + packet->tc.ignore = true; + return; + } + + /* + * Last message is power down request, no need to convert + * or filter the value. + */ + if (msg_idx < ts->msg_count - 1) { + + val = ads7846_get_value(ts, m); + + action = ts->filter(ts->filter_data, msg_idx, &val); + switch (action) { + case ADS7846_FILTER_REPEAT: + continue; + + case ADS7846_FILTER_IGNORE: + packet->tc.ignore = true; + msg_idx = ts->msg_count - 1; + continue; -static void ads7846_rx(void *ads) + case ADS7846_FILTER_OK: + ads7846_update_value(m, val); + packet->tc.ignore = false; + msg_idx++; + break; + + default: + BUG(); + } + } else { + msg_idx++; + } + } +} + +static void ads7846_report_state(struct ads7846 *ts) { - struct ads7846 *ts = ads; - struct ads7846_packet *packet = ts->packet; - unsigned Rt; - u16 x, y, z1, z2; + struct ads7846_packet *packet = ts->packet; + unsigned int Rt; + u16 x, y, z1, z2; - /* ads7846_rx_val() did in-place conversion (including byteswap) from - * on-the-wire format as part of debouncing to get stable readings. + /* + * ads7846_get_value() does in-place conversion (including byte swap) + * from on-the-wire format as part of debouncing to get stable + * readings. */ - x = packet->tc.x; - y = packet->tc.y; - z1 = packet->tc.z1; - z2 = packet->tc.z2; + if (ts->model == 7845) { + x = *(u16 *)packet->tc.x_buf; + y = *(u16 *)packet->tc.y_buf; + z1 = 0; + z2 = 0; + } else { + x = packet->tc.x; + y = packet->tc.y; + z1 = packet->tc.z1; + z2 = packet->tc.z2; + } /* range filtering */ if (x == MAX_12BIT) @@ -551,6 +782,12 @@ static void ads7846_rx(void *ads) if (ts->model == 7843) { Rt = ts->pressure_max / 2; + } else if (ts->model == 7845) { + if (get_pendown_state(ts)) + Rt = ts->pressure_max / 2; + else + Rt = 0; + dev_vdbg(&ts->spi->dev, "x/y: %d/%d, PD %d\n", x, y, Rt); } else if (likely(x && z1)) { /* compute touch pressure resistance using equation #2 */ Rt = z2; @@ -563,19 +800,19 @@ static void ads7846_rx(void *ads) Rt = 0; } - /* Sample found inconsistent by debouncing or pressure is beyond + /* + * Sample found inconsistent by debouncing or pressure is beyond * the maximum. Don't report it to user space, repeat at least * once more the measurement */ if (packet->tc.ignore || Rt > ts->pressure_max) { dev_vdbg(&ts->spi->dev, "ignored %d pressure %d\n", packet->tc.ignore, Rt); - hrtimer_start(&ts->timer, ktime_set(0, TS_POLL_PERIOD), - HRTIMER_MODE_REL); return; } - /* Maybe check the pendown state before reporting. This discards + /* + * Maybe check the pendown state before reporting. This discards * false readings when the pen is lifted. */ if (ts->penirq_recheck_delay_usecs) { @@ -584,8 +821,9 @@ static void ads7846_rx(void *ads) Rt = 0; } - /* NOTE: We can't rely on the pressure to determine the pen down - * state, even this controller has a pressure sensor. The pressure + /* + * NOTE: We can't rely on the pressure to determine the pen down + * state, even this controller has a pressure sensor. The pressure * value can fluctuate for quite a while after lifting the pen and * in some cases may not even settle at the expected value. * @@ -595,15 +833,15 @@ static void ads7846_rx(void *ads) if (Rt) { struct input_dev *input = ts->input; + if (ts->swap_xy) + swap(x, y); + if (!ts->pendown) { input_report_key(input, BTN_TOUCH, 1); - ts->pendown = 1; + ts->pendown = true; dev_vdbg(&ts->spi->dev, "DOWN\n"); } - if (ts->swap_xy) - swap(x, y); - input_report_abs(input, ABS_X, x); input_report_abs(input, ABS_Y, y); input_report_abs(input, ABS_PRESSURE, ts->pressure_max - Rt); @@ -611,242 +849,94 @@ static void ads7846_rx(void *ads) input_sync(input); dev_vdbg(&ts->spi->dev, "%4d/%4d/%4d\n", x, y, Rt); } - - hrtimer_start(&ts->timer, ktime_set(0, TS_POLL_PERIOD), - HRTIMER_MODE_REL); -} - -static int ads7846_debounce(void *ads, int data_idx, int *val) -{ - struct ads7846 *ts = ads; - - if (!ts->read_cnt || (abs(ts->last_read - *val) > ts->debounce_tol)) { - /* Start over collecting consistent readings. */ - ts->read_rep = 0; - /* Repeat it, if this was the first read or the read - * wasn't consistent enough. */ - if (ts->read_cnt < ts->debounce_max) { - ts->last_read = *val; - ts->read_cnt++; - return ADS7846_FILTER_REPEAT; - } else { - /* Maximum number of debouncing reached and still - * not enough number of consistent readings. Abort - * the whole sample, repeat it in the next sampling - * period. - */ - ts->read_cnt = 0; - return ADS7846_FILTER_IGNORE; - } - } else { - if (++ts->read_rep > ts->debounce_rep) { - /* Got a good reading for this coordinate, - * go for the next one. */ - ts->read_cnt = 0; - ts->read_rep = 0; - return ADS7846_FILTER_OK; - } else { - /* Read more values that are consistent. */ - ts->read_cnt++; - return ADS7846_FILTER_REPEAT; - } - } } -static int ads7846_no_filter(void *ads, int data_idx, int *val) +static irqreturn_t ads7846_hard_irq(int irq, void *handle) { - return ADS7846_FILTER_OK; -} - -static void ads7846_rx_val(void *ads) -{ - struct ads7846 *ts = ads; - struct ads7846_packet *packet = ts->packet; - struct spi_message *m; - struct spi_transfer *t; - int val; - int action; - int status; - - m = &ts->msg[ts->msg_idx]; - t = list_entry(m->transfers.prev, struct spi_transfer, transfer_list); - - /* adjust: on-wire is a must-ignore bit, a BE12 value, then padding; - * built from two 8 bit values written msb-first. - */ - val = be16_to_cpup((__be16 *)t->rx_buf) >> 3; + struct ads7846 *ts = handle; - action = ts->filter(ts->filter_data, ts->msg_idx, &val); - switch (action) { - case ADS7846_FILTER_REPEAT: - break; - case ADS7846_FILTER_IGNORE: - packet->tc.ignore = 1; - /* Last message will contain ads7846_rx() as the - * completion function. - */ - m = ts->last_msg; - break; - case ADS7846_FILTER_OK: - *(u16 *)t->rx_buf = val; - packet->tc.ignore = 0; - m = &ts->msg[++ts->msg_idx]; - break; - default: - BUG(); - } - ts->wait_for_sync(); - status = spi_async(ts->spi, m); - if (status) - dev_err(&ts->spi->dev, "spi_async --> %d\n", - status); + return get_pendown_state(ts) ? IRQ_WAKE_THREAD : IRQ_HANDLED; } -static enum hrtimer_restart ads7846_timer(struct hrtimer *handle) -{ - struct ads7846 *ts = container_of(handle, struct ads7846, timer); - int status = 0; - - spin_lock(&ts->lock); - - if (unlikely(!get_pendown_state(ts) || - device_suspended(&ts->spi->dev))) { - if (ts->pendown) { - struct input_dev *input = ts->input; - - input_report_key(input, BTN_TOUCH, 0); - input_report_abs(input, ABS_PRESSURE, 0); - input_sync(input); - - ts->pendown = 0; - dev_vdbg(&ts->spi->dev, "UP\n"); - } - - /* measurement cycle ended */ - if (!device_suspended(&ts->spi->dev)) { - ts->irq_disabled = 0; - enable_irq(ts->spi->irq); - } - ts->pending = 0; - } else { - /* pen is still down, continue with the measurement */ - ts->msg_idx = 0; - ts->wait_for_sync(); - status = spi_async(ts->spi, &ts->msg[0]); - if (status) - dev_err(&ts->spi->dev, "spi_async --> %d\n", status); - } - - spin_unlock(&ts->lock); - return HRTIMER_NORESTART; -} static irqreturn_t ads7846_irq(int irq, void *handle) { struct ads7846 *ts = handle; - unsigned long flags; - - spin_lock_irqsave(&ts->lock, flags); - if (likely(get_pendown_state(ts))) { - if (!ts->irq_disabled) { - /* The ARM do_simple_IRQ() dispatcher doesn't act - * like the other dispatchers: it will report IRQs - * even after they've been disabled. We work around - * that here. (The "generic irq" framework may help...) - */ - ts->irq_disabled = 1; - disable_irq_nosync(ts->spi->irq); - ts->pending = 1; - hrtimer_start(&ts->timer, ktime_set(0, TS_POLL_DELAY), - HRTIMER_MODE_REL); - } - } - spin_unlock_irqrestore(&ts->lock, flags); - return IRQ_HANDLED; -} + /* Start with a small delay before checking pendown state */ + msleep(TS_POLL_DELAY); -/*--------------------------------------------------------------------------*/ + while (!ts->stopped && get_pendown_state(ts)) { -/* Must be called with ts->lock held */ -static void ads7846_disable(struct ads7846 *ts) -{ - if (ts->disabled) - return; + /* pen is down, continue with the measurement */ + ads7846_read_state(ts); - ts->disabled = 1; + if (!ts->stopped) + ads7846_report_state(ts); - /* are we waiting for IRQ, or polling? */ - if (!ts->pending) { - ts->irq_disabled = 1; - disable_irq(ts->spi->irq); - } else { - /* the timer will run at least once more, and - * leave everything in a clean state, IRQ disabled - */ - while (ts->pending) { - spin_unlock_irq(&ts->lock); - msleep(1); - spin_lock_irq(&ts->lock); - } + wait_event_timeout(ts->wait, ts->stopped, + msecs_to_jiffies(TS_POLL_PERIOD)); } - regulator_disable(ts->reg); - - /* we know the chip's in lowpower mode since we always - * leave it that way after every request - */ -} + if (ts->pendown) { + struct input_dev *input = ts->input; -/* Must be called with ts->lock held */ -static void ads7846_enable(struct ads7846 *ts) -{ - if (!ts->disabled) - return; + input_report_key(input, BTN_TOUCH, 0); + input_report_abs(input, ABS_PRESSURE, 0); + input_sync(input); - regulator_enable(ts->reg); + ts->pendown = false; + dev_vdbg(&ts->spi->dev, "UP\n"); + } - ts->disabled = 0; - ts->irq_disabled = 0; - enable_irq(ts->spi->irq); + return IRQ_HANDLED; } static int ads7846_suspend(struct spi_device *spi, pm_message_t message) { struct ads7846 *ts = dev_get_drvdata(&spi->dev); - spin_lock_irq(&ts->lock); + mutex_lock(&ts->lock); - ts->is_suspended = 1; - ads7846_disable(ts); + if (!ts->suspended) { - spin_unlock_irq(&ts->lock); + if (!ts->disabled) + __ads7846_disable(ts); - if (device_may_wakeup(&ts->spi->dev)) - enable_irq_wake(ts->spi->irq); + if (device_may_wakeup(&ts->spi->dev)) + enable_irq_wake(ts->spi->irq); - return 0; + ts->suspended = true; + } + mutex_unlock(&ts->lock); + + return 0; } static int ads7846_resume(struct spi_device *spi) { struct ads7846 *ts = dev_get_drvdata(&spi->dev); - if (device_may_wakeup(&ts->spi->dev)) - disable_irq_wake(ts->spi->irq); + mutex_lock(&ts->lock); - spin_lock_irq(&ts->lock); + if (ts->suspended) { - ts->is_suspended = 0; - ads7846_enable(ts); + ts->suspended = false; - spin_unlock_irq(&ts->lock); + if (device_may_wakeup(&ts->spi->dev)) + disable_irq_wake(ts->spi->irq); + + if (!ts->disabled) + __ads7846_enable(ts); + } + + mutex_unlock(&ts->lock); return 0; } -static int __devinit setup_pendown(struct spi_device *spi, struct ads7846 *ts) +static int __devinit ads7846_setup_pendown(struct spi_device *spi, struct ads7846 *ts) { struct ads7846_platform_data *pdata = spi->dev.platform_data; int err; @@ -868,158 +958,64 @@ static int __devinit setup_pendown(struct spi_device *spi, struct ads7846 *ts) err = gpio_request(pdata->gpio_pendown, "ads7846_pendown"); if (err) { dev_err(&spi->dev, "failed to request pendown GPIO%d\n", - pdata->gpio_pendown); + pdata->gpio_pendown); return err; } ts->gpio_pendown = pdata->gpio_pendown; + return 0; } -static int __devinit ads7846_probe(struct spi_device *spi) +/* + * Set up the transfers to read touchscreen state; this assumes we + * use formula #2 for pressure, not #3. + */ +static void __devinit ads7846_setup_spi_msg(struct ads7846 *ts, + const struct ads7846_platform_data *pdata) { - struct ads7846 *ts; - struct ads7846_packet *packet; - struct input_dev *input_dev; - struct ads7846_platform_data *pdata = spi->dev.platform_data; - struct spi_message *m; - struct spi_transfer *x; - int vref; - int err; - - if (!spi->irq) { - dev_dbg(&spi->dev, "no IRQ?\n"); - return -ENODEV; - } - - if (!pdata) { - dev_dbg(&spi->dev, "no platform data?\n"); - return -ENODEV; - } - - /* don't exceed max specified sample rate */ - if (spi->max_speed_hz > (125000 * SAMPLE_BITS)) { - dev_dbg(&spi->dev, "f(sample) %d KHz?\n", - (spi->max_speed_hz/SAMPLE_BITS)/1000); - return -EINVAL; - } - - /* We'd set TX wordsize 8 bits and RX wordsize to 13 bits ... except - * that even if the hardware can do that, the SPI controller driver - * may not. So we stick to very-portable 8 bit words, both RX and TX. - */ - spi->bits_per_word = 8; - spi->mode = SPI_MODE_0; - err = spi_setup(spi); - if (err < 0) - return err; - - ts = kzalloc(sizeof(struct ads7846), GFP_KERNEL); - packet = kzalloc(sizeof(struct ads7846_packet), GFP_KERNEL); - input_dev = input_allocate_device(); - if (!ts || !packet || !input_dev) { - err = -ENOMEM; - goto err_free_mem; - } - - dev_set_drvdata(&spi->dev, ts); - - ts->packet = packet; - ts->spi = spi; - ts->input = input_dev; - ts->vref_mv = pdata->vref_mv; - ts->swap_xy = pdata->swap_xy; - - hrtimer_init(&ts->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); - ts->timer.function = ads7846_timer; - - spin_lock_init(&ts->lock); - - ts->model = pdata->model ? : 7846; - ts->vref_delay_usecs = pdata->vref_delay_usecs ? : 100; - ts->x_plate_ohms = pdata->x_plate_ohms ? : 400; - ts->pressure_max = pdata->pressure_max ? : ~0; - - if (pdata->filter != NULL) { - if (pdata->filter_init != NULL) { - err = pdata->filter_init(pdata, &ts->filter_data); - if (err < 0) - goto err_free_mem; - } - ts->filter = pdata->filter; - ts->filter_cleanup = pdata->filter_cleanup; - } else if (pdata->debounce_max) { - ts->debounce_max = pdata->debounce_max; - if (ts->debounce_max < 2) - ts->debounce_max = 2; - ts->debounce_tol = pdata->debounce_tol; - ts->debounce_rep = pdata->debounce_rep; - ts->filter = ads7846_debounce; - ts->filter_data = ts; - } else - ts->filter = ads7846_no_filter; - - err = setup_pendown(spi, ts); - if (err) - goto err_cleanup_filter; - - if (pdata->penirq_recheck_delay_usecs) - ts->penirq_recheck_delay_usecs = - pdata->penirq_recheck_delay_usecs; - - ts->wait_for_sync = pdata->wait_for_sync ? : null_wait_for_sync; - - snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(&spi->dev)); - snprintf(ts->name, sizeof(ts->name), "ADS%d Touchscreen", ts->model); - - input_dev->name = ts->name; - input_dev->phys = ts->phys; - input_dev->dev.parent = &spi->dev; - - input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); - input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); - input_set_abs_params(input_dev, ABS_X, - pdata->x_min ? : 0, - pdata->x_max ? : MAX_12BIT, - 0, 0); - input_set_abs_params(input_dev, ABS_Y, - pdata->y_min ? : 0, - pdata->y_max ? : MAX_12BIT, - 0, 0); - input_set_abs_params(input_dev, ABS_PRESSURE, - pdata->pressure_min, pdata->pressure_max, 0, 0); - - vref = pdata->keep_vref_on; + struct spi_message *m = &ts->msg[0]; + struct spi_transfer *x = ts->xfer; + struct ads7846_packet *packet = ts->packet; + int vref = pdata->keep_vref_on; if (ts->model == 7873) { - /* The AD7873 is almost identical to the ADS7846 + /* + * The AD7873 is almost identical to the ADS7846 * keep VREF off during differential/ratiometric - * conversion modes + * conversion modes. */ ts->model = 7846; vref = 0; } - /* set up the transfers to read touchscreen state; this assumes we - * use formula #2 for pressure, not #3. - */ - m = &ts->msg[0]; - x = ts->xfer; - + ts->msg_count = 1; spi_message_init(m); + m->context = ts; - /* y- still on; turn on only y+ (and ADC) */ - packet->read_y = READ_Y(vref); - x->tx_buf = &packet->read_y; - x->len = 1; - spi_message_add_tail(x, m); + if (ts->model == 7845) { + packet->read_y_cmd[0] = READ_Y(vref); + packet->read_y_cmd[1] = 0; + packet->read_y_cmd[2] = 0; + x->tx_buf = &packet->read_y_cmd[0]; + x->rx_buf = &packet->tc.y_buf[0]; + x->len = 3; + spi_message_add_tail(x, m); + } else { + /* y- still on; turn on only y+ (and ADC) */ + packet->read_y = READ_Y(vref); + x->tx_buf = &packet->read_y; + x->len = 1; + spi_message_add_tail(x, m); - x++; - x->rx_buf = &packet->tc.y; - x->len = 2; - spi_message_add_tail(x, m); + x++; + x->rx_buf = &packet->tc.y; + x->len = 2; + spi_message_add_tail(x, m); + } - /* the first sample after switching drivers can be low quality; + /* + * The first sample after switching drivers can be low quality; * optionally discard it, using a second one after the signals * have had enough time to stabilize. */ @@ -1037,23 +1033,33 @@ static int __devinit ads7846_probe(struct spi_device *spi) spi_message_add_tail(x, m); } - m->complete = ads7846_rx_val; - m->context = ts; - + ts->msg_count++; m++; spi_message_init(m); + m->context = ts; - /* turn y- off, x+ on, then leave in lowpower */ - x++; - packet->read_x = READ_X(vref); - x->tx_buf = &packet->read_x; - x->len = 1; - spi_message_add_tail(x, m); + if (ts->model == 7845) { + x++; + packet->read_x_cmd[0] = READ_X(vref); + packet->read_x_cmd[1] = 0; + packet->read_x_cmd[2] = 0; + x->tx_buf = &packet->read_x_cmd[0]; + x->rx_buf = &packet->tc.x_buf[0]; + x->len = 3; + spi_message_add_tail(x, m); + } else { + /* turn y- off, x+ on, then leave in lowpower */ + x++; + packet->read_x = READ_X(vref); + x->tx_buf = &packet->read_x; + x->len = 1; + spi_message_add_tail(x, m); - x++; - x->rx_buf = &packet->tc.x; - x->len = 2; - spi_message_add_tail(x, m); + x++; + x->rx_buf = &packet->tc.x; + x->len = 2; + spi_message_add_tail(x, m); + } /* ... maybe discard first sample ... */ if (pdata->settle_delay_usecs) { @@ -1070,13 +1076,12 @@ static int __devinit ads7846_probe(struct spi_device *spi) spi_message_add_tail(x, m); } - m->complete = ads7846_rx_val; - m->context = ts; - /* turn y+ off, x- on; we'll use formula #2 */ if (ts->model == 7846) { + ts->msg_count++; m++; spi_message_init(m); + m->context = ts; x++; packet->read_z1 = READ_Z1(vref); @@ -1104,11 +1109,10 @@ static int __devinit ads7846_probe(struct spi_device *spi) spi_message_add_tail(x, m); } - m->complete = ads7846_rx_val; - m->context = ts; - + ts->msg_count++; m++; spi_message_init(m); + m->context = ts; x++; packet->read_z2 = READ_Z2(vref); @@ -1135,31 +1139,148 @@ static int __devinit ads7846_probe(struct spi_device *spi) x->len = 2; spi_message_add_tail(x, m); } - - m->complete = ads7846_rx_val; - m->context = ts; } /* power down */ + ts->msg_count++; m++; spi_message_init(m); + m->context = ts; - x++; - packet->pwrdown = PWRDOWN; - x->tx_buf = &packet->pwrdown; - x->len = 1; - spi_message_add_tail(x, m); + if (ts->model == 7845) { + x++; + packet->pwrdown_cmd[0] = PWRDOWN; + packet->pwrdown_cmd[1] = 0; + packet->pwrdown_cmd[2] = 0; + x->tx_buf = &packet->pwrdown_cmd[0]; + x->len = 3; + } else { + x++; + packet->pwrdown = PWRDOWN; + x->tx_buf = &packet->pwrdown; + x->len = 1; + spi_message_add_tail(x, m); + + x++; + x->rx_buf = &packet->dummy; + x->len = 2; + } - x++; - x->rx_buf = &packet->dummy; - x->len = 2; CS_CHANGE(*x); spi_message_add_tail(x, m); +} - m->complete = ads7846_rx; - m->context = ts; +static int __devinit ads7846_probe(struct spi_device *spi) +{ + struct ads7846 *ts; + struct ads7846_packet *packet; + struct input_dev *input_dev; + struct ads7846_platform_data *pdata = spi->dev.platform_data; + unsigned long irq_flags; + int err; + + if (!spi->irq) { + dev_dbg(&spi->dev, "no IRQ?\n"); + return -ENODEV; + } + + if (!pdata) { + dev_dbg(&spi->dev, "no platform data?\n"); + return -ENODEV; + } + + /* don't exceed max specified sample rate */ + if (spi->max_speed_hz > (125000 * SAMPLE_BITS)) { + dev_dbg(&spi->dev, "f(sample) %d KHz?\n", + (spi->max_speed_hz/SAMPLE_BITS)/1000); + return -EINVAL; + } + + /* We'd set TX word size 8 bits and RX word size to 13 bits ... except + * that even if the hardware can do that, the SPI controller driver + * may not. So we stick to very-portable 8 bit words, both RX and TX. + */ + spi->bits_per_word = 8; + spi->mode = SPI_MODE_0; + err = spi_setup(spi); + if (err < 0) + return err; + + ts = kzalloc(sizeof(struct ads7846), GFP_KERNEL); + packet = kzalloc(sizeof(struct ads7846_packet), GFP_KERNEL); + input_dev = input_allocate_device(); + if (!ts || !packet || !input_dev) { + err = -ENOMEM; + goto err_free_mem; + } - ts->last_msg = m; + dev_set_drvdata(&spi->dev, ts); + + ts->packet = packet; + ts->spi = spi; + ts->input = input_dev; + ts->vref_mv = pdata->vref_mv; + ts->swap_xy = pdata->swap_xy; + + mutex_init(&ts->lock); + init_waitqueue_head(&ts->wait); + + ts->model = pdata->model ? : 7846; + ts->vref_delay_usecs = pdata->vref_delay_usecs ? : 100; + ts->x_plate_ohms = pdata->x_plate_ohms ? : 400; + ts->pressure_max = pdata->pressure_max ? : ~0; + + if (pdata->filter != NULL) { + if (pdata->filter_init != NULL) { + err = pdata->filter_init(pdata, &ts->filter_data); + if (err < 0) + goto err_free_mem; + } + ts->filter = pdata->filter; + ts->filter_cleanup = pdata->filter_cleanup; + } else if (pdata->debounce_max) { + ts->debounce_max = pdata->debounce_max; + if (ts->debounce_max < 2) + ts->debounce_max = 2; + ts->debounce_tol = pdata->debounce_tol; + ts->debounce_rep = pdata->debounce_rep; + ts->filter = ads7846_debounce_filter; + ts->filter_data = ts; + } else { + ts->filter = ads7846_no_filter; + } + + err = ads7846_setup_pendown(spi, ts); + if (err) + goto err_cleanup_filter; + + if (pdata->penirq_recheck_delay_usecs) + ts->penirq_recheck_delay_usecs = + pdata->penirq_recheck_delay_usecs; + + ts->wait_for_sync = pdata->wait_for_sync ? : null_wait_for_sync; + + snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(&spi->dev)); + snprintf(ts->name, sizeof(ts->name), "ADS%d Touchscreen", ts->model); + + input_dev->name = ts->name; + input_dev->phys = ts->phys; + input_dev->dev.parent = &spi->dev; + + input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); + input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); + input_set_abs_params(input_dev, ABS_X, + pdata->x_min ? : 0, + pdata->x_max ? : MAX_12BIT, + 0, 0); + input_set_abs_params(input_dev, ABS_Y, + pdata->y_min ? : 0, + pdata->y_max ? : MAX_12BIT, + 0, 0); + input_set_abs_params(input_dev, ABS_PRESSURE, + pdata->pressure_min, pdata->pressure_max, 0, 0); + + ads7846_setup_spi_msg(ts, pdata); ts->reg = regulator_get(&spi->dev, "vcc"); if (IS_ERR(ts->reg)) { @@ -1174,17 +1295,23 @@ static int __devinit ads7846_probe(struct spi_device *spi) goto err_put_regulator; } - if (request_irq(spi->irq, ads7846_irq, IRQF_TRIGGER_FALLING, - spi->dev.driver->name, ts)) { + irq_flags = pdata->irq_flags ? : IRQF_TRIGGER_FALLING; + irq_flags |= IRQF_ONESHOT; + + err = request_threaded_irq(spi->irq, ads7846_hard_irq, ads7846_irq, + irq_flags, spi->dev.driver->name, ts); + if (err && !pdata->irq_flags) { dev_info(&spi->dev, "trying pin change workaround on irq %d\n", spi->irq); - err = request_irq(spi->irq, ads7846_irq, - IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING, - spi->dev.driver->name, ts); - if (err) { - dev_dbg(&spi->dev, "irq %d busy?\n", spi->irq); - goto err_disable_regulator; - } + irq_flags |= IRQF_TRIGGER_RISING; + err = request_threaded_irq(spi->irq, + ads7846_hard_irq, ads7846_irq, + irq_flags, spi->dev.driver->name, ts); + } + + if (err) { + dev_dbg(&spi->dev, "irq %d busy?\n", spi->irq); + goto err_disable_regulator; } err = ads784x_hwmon_register(spi, ts); @@ -1193,11 +1320,15 @@ static int __devinit ads7846_probe(struct spi_device *spi) dev_info(&spi->dev, "touchscreen, irq %d\n", spi->irq); - /* take a first sample, leaving nPENIRQ active and vREF off; avoid + /* + * Take a first sample, leaving nPENIRQ active and vREF off; avoid * the touchscreen, in case it's not connected. */ - (void) ads7846_read12_ser(&spi->dev, - READ_12BIT_SER(vaux) | ADS_PD10_ALL_ON); + if (ts->model == 7845) + ads7845_read12_ser(&spi->dev, PWRDOWN); + else + (void) ads7846_read12_ser(&spi->dev, + READ_12BIT_SER(vaux) | ADS_PD10_ALL_ON); err = sysfs_create_group(&spi->dev.kobj, &ads784x_attr_group); if (err) @@ -1236,20 +1367,18 @@ static int __devinit ads7846_probe(struct spi_device *spi) static int __devexit ads7846_remove(struct spi_device *spi) { - struct ads7846 *ts = dev_get_drvdata(&spi->dev); + struct ads7846 *ts = dev_get_drvdata(&spi->dev); device_init_wakeup(&spi->dev, false); - ads784x_hwmon_unregister(spi, ts); - input_unregister_device(ts->input); - - ads7846_suspend(spi, PMSG_SUSPEND); - sysfs_remove_group(&spi->dev.kobj, &ads784x_attr_group); + ads7846_disable(ts); free_irq(ts->spi->irq, ts); - /* suspend left the IRQ disabled */ - enable_irq(ts->spi->irq); + + input_unregister_device(ts->input); + + ads784x_hwmon_unregister(spi, ts); regulator_disable(ts->reg); regulator_put(ts->reg); @@ -1264,6 +1393,7 @@ static int __devexit ads7846_remove(struct spi_device *spi) kfree(ts); dev_dbg(&spi->dev, "unregistered touchscreen\n"); + return 0; } diff --git a/drivers/input/touchscreen/bu21013_ts.c b/drivers/input/touchscreen/bu21013_ts.c new file mode 100644 index 000000000000..2ca9e5d66460 --- /dev/null +++ b/drivers/input/touchscreen/bu21013_ts.c @@ -0,0 +1,648 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * Author: Naveen Kumar G <naveen.gaddipati@stericsson.com> for ST-Ericsson + * License terms:GNU General Public License (GPL) version 2 + */ + +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/i2c.h> +#include <linux/workqueue.h> +#include <linux/input.h> +#include <linux/input/bu21013.h> +#include <linux/slab.h> + +#define PEN_DOWN_INTR 0 +#define MAX_FINGERS 2 +#define RESET_DELAY 30 +#define PENUP_TIMEOUT (10) +#define DELTA_MIN 16 +#define MASK_BITS 0x03 +#define SHIFT_8 8 +#define SHIFT_2 2 +#define LENGTH_OF_BUFFER 11 +#define I2C_RETRY_COUNT 5 + +#define BU21013_SENSORS_BTN_0_7_REG 0x70 +#define BU21013_SENSORS_BTN_8_15_REG 0x71 +#define BU21013_SENSORS_BTN_16_23_REG 0x72 +#define BU21013_X1_POS_MSB_REG 0x73 +#define BU21013_X1_POS_LSB_REG 0x74 +#define BU21013_Y1_POS_MSB_REG 0x75 +#define BU21013_Y1_POS_LSB_REG 0x76 +#define BU21013_X2_POS_MSB_REG 0x77 +#define BU21013_X2_POS_LSB_REG 0x78 +#define BU21013_Y2_POS_MSB_REG 0x79 +#define BU21013_Y2_POS_LSB_REG 0x7A +#define BU21013_INT_CLR_REG 0xE8 +#define BU21013_INT_MODE_REG 0xE9 +#define BU21013_GAIN_REG 0xEA +#define BU21013_OFFSET_MODE_REG 0xEB +#define BU21013_XY_EDGE_REG 0xEC +#define BU21013_RESET_REG 0xED +#define BU21013_CALIB_REG 0xEE +#define BU21013_DONE_REG 0xEF +#define BU21013_SENSOR_0_7_REG 0xF0 +#define BU21013_SENSOR_8_15_REG 0xF1 +#define BU21013_SENSOR_16_23_REG 0xF2 +#define BU21013_POS_MODE1_REG 0xF3 +#define BU21013_POS_MODE2_REG 0xF4 +#define BU21013_CLK_MODE_REG 0xF5 +#define BU21013_IDLE_REG 0xFA +#define BU21013_FILTER_REG 0xFB +#define BU21013_TH_ON_REG 0xFC +#define BU21013_TH_OFF_REG 0xFD + + +#define BU21013_RESET_ENABLE 0x01 + +#define BU21013_SENSORS_EN_0_7 0x3F +#define BU21013_SENSORS_EN_8_15 0xFC +#define BU21013_SENSORS_EN_16_23 0x1F + +#define BU21013_POS_MODE1_0 0x02 +#define BU21013_POS_MODE1_1 0x04 +#define BU21013_POS_MODE1_2 0x08 + +#define BU21013_POS_MODE2_ZERO 0x01 +#define BU21013_POS_MODE2_AVG1 0x02 +#define BU21013_POS_MODE2_AVG2 0x04 +#define BU21013_POS_MODE2_EN_XY 0x08 +#define BU21013_POS_MODE2_EN_RAW 0x10 +#define BU21013_POS_MODE2_MULTI 0x80 + +#define BU21013_CLK_MODE_DIV 0x01 +#define BU21013_CLK_MODE_EXT 0x02 +#define BU21013_CLK_MODE_CALIB 0x80 + +#define BU21013_IDLET_0 0x01 +#define BU21013_IDLET_1 0x02 +#define BU21013_IDLET_2 0x04 +#define BU21013_IDLET_3 0x08 +#define BU21013_IDLE_INTERMIT_EN 0x10 + +#define BU21013_DELTA_0_6 0x7F +#define BU21013_FILTER_EN 0x80 + +#define BU21013_INT_MODE_LEVEL 0x00 +#define BU21013_INT_MODE_EDGE 0x01 + +#define BU21013_GAIN_0 0x01 +#define BU21013_GAIN_1 0x02 +#define BU21013_GAIN_2 0x04 + +#define BU21013_OFFSET_MODE_DEFAULT 0x00 +#define BU21013_OFFSET_MODE_MOVE 0x01 +#define BU21013_OFFSET_MODE_DISABLE 0x02 + +#define BU21013_TH_ON_0 0x01 +#define BU21013_TH_ON_1 0x02 +#define BU21013_TH_ON_2 0x04 +#define BU21013_TH_ON_3 0x08 +#define BU21013_TH_ON_4 0x10 +#define BU21013_TH_ON_5 0x20 +#define BU21013_TH_ON_6 0x40 +#define BU21013_TH_ON_7 0x80 +#define BU21013_TH_ON_MAX 0xFF + +#define BU21013_TH_OFF_0 0x01 +#define BU21013_TH_OFF_1 0x02 +#define BU21013_TH_OFF_2 0x04 +#define BU21013_TH_OFF_3 0x08 +#define BU21013_TH_OFF_4 0x10 +#define BU21013_TH_OFF_5 0x20 +#define BU21013_TH_OFF_6 0x40 +#define BU21013_TH_OFF_7 0x80 +#define BU21013_TH_OFF_MAX 0xFF + +#define BU21013_X_EDGE_0 0x01 +#define BU21013_X_EDGE_1 0x02 +#define BU21013_X_EDGE_2 0x04 +#define BU21013_X_EDGE_3 0x08 +#define BU21013_Y_EDGE_0 0x10 +#define BU21013_Y_EDGE_1 0x20 +#define BU21013_Y_EDGE_2 0x40 +#define BU21013_Y_EDGE_3 0x80 + +#define BU21013_DONE 0x01 +#define BU21013_NUMBER_OF_X_SENSORS (6) +#define BU21013_NUMBER_OF_Y_SENSORS (11) + +#define DRIVER_TP "bu21013_tp" + +/** + * struct bu21013_ts_data - touch panel data structure + * @client: pointer to the i2c client + * @wait: variable to wait_queue_head_t structure + * @touch_stopped: touch stop flag + * @chip: pointer to the touch panel controller + * @in_dev: pointer to the input device structure + * @intr_pin: interrupt pin value + * + * Touch panel device data structure + */ +struct bu21013_ts_data { + struct i2c_client *client; + wait_queue_head_t wait; + bool touch_stopped; + const struct bu21013_platform_device *chip; + struct input_dev *in_dev; + unsigned int intr_pin; +}; + +/** + * bu21013_read_block_data(): read the touch co-ordinates + * @data: bu21013_ts_data structure pointer + * @buf: byte pointer + * + * Read the touch co-ordinates using i2c read block into buffer + * and returns integer. + */ +static int bu21013_read_block_data(struct bu21013_ts_data *data, u8 *buf) +{ + int ret, i; + + for (i = 0; i < I2C_RETRY_COUNT; i++) { + ret = i2c_smbus_read_i2c_block_data + (data->client, BU21013_SENSORS_BTN_0_7_REG, + LENGTH_OF_BUFFER, buf); + if (ret == LENGTH_OF_BUFFER) + return 0; + } + return -EINVAL; +} + +/** + * bu21013_do_touch_report(): Get the touch co-ordinates + * @data: bu21013_ts_data structure pointer + * + * Get the touch co-ordinates from touch sensor registers and writes + * into device structure and returns integer. + */ +static int bu21013_do_touch_report(struct bu21013_ts_data *data) +{ + u8 buf[LENGTH_OF_BUFFER]; + unsigned int pos_x[2], pos_y[2]; + bool has_x_sensors, has_y_sensors; + int finger_down_count = 0; + int i; + + if (data == NULL) + return -EINVAL; + + if (bu21013_read_block_data(data, buf) < 0) + return -EINVAL; + + has_x_sensors = hweight32(buf[0] & BU21013_SENSORS_EN_0_7); + has_y_sensors = hweight32(((buf[1] & BU21013_SENSORS_EN_8_15) | + ((buf[2] & BU21013_SENSORS_EN_16_23) << SHIFT_8)) >> SHIFT_2); + if (!has_x_sensors || !has_y_sensors) + return 0; + + for (i = 0; i < MAX_FINGERS; i++) { + const u8 *p = &buf[4 * i + 3]; + unsigned int x = p[0] << SHIFT_2 | (p[1] & MASK_BITS); + unsigned int y = p[2] << SHIFT_2 | (p[3] & MASK_BITS); + if (x == 0 || y == 0) + continue; + pos_x[finger_down_count] = x; + pos_y[finger_down_count] = y; + finger_down_count++; + } + + if (finger_down_count) { + if (finger_down_count == 2 && + (abs(pos_x[0] - pos_x[1]) < DELTA_MIN || + abs(pos_y[0] - pos_y[1]) < DELTA_MIN)) { + return 0; + } + + for (i = 0; i < finger_down_count; i++) { + if (data->chip->x_flip) + pos_x[i] = data->chip->touch_x_max - pos_x[i]; + if (data->chip->y_flip) + pos_y[i] = data->chip->touch_y_max - pos_y[i]; + + input_report_abs(data->in_dev, + ABS_MT_POSITION_X, pos_x[i]); + input_report_abs(data->in_dev, + ABS_MT_POSITION_Y, pos_y[i]); + input_mt_sync(data->in_dev); + } + } else + input_mt_sync(data->in_dev); + + input_sync(data->in_dev); + + return 0; +} +/** + * bu21013_gpio_irq() - gpio thread function for touch interrupt + * @irq: irq value + * @device_data: void pointer + * + * This gpio thread function for touch interrupt + * and returns irqreturn_t. + */ +static irqreturn_t bu21013_gpio_irq(int irq, void *device_data) +{ + struct bu21013_ts_data *data = device_data; + struct i2c_client *i2c = data->client; + int retval; + + do { + retval = bu21013_do_touch_report(data); + if (retval < 0) { + dev_err(&i2c->dev, "bu21013_do_touch_report failed\n"); + return IRQ_NONE; + } + + data->intr_pin = data->chip->irq_read_val(); + if (data->intr_pin == PEN_DOWN_INTR) + wait_event_timeout(data->wait, data->touch_stopped, + msecs_to_jiffies(2)); + } while (!data->intr_pin && !data->touch_stopped); + + return IRQ_HANDLED; +} + +/** + * bu21013_init_chip() - power on sequence for the bu21013 controller + * @data: device structure pointer + * + * This function is used to power on + * the bu21013 controller and returns integer. + */ +static int bu21013_init_chip(struct bu21013_ts_data *data) +{ + int retval; + struct i2c_client *i2c = data->client; + + retval = i2c_smbus_write_byte_data(i2c, BU21013_RESET_REG, + BU21013_RESET_ENABLE); + if (retval < 0) { + dev_err(&i2c->dev, "BU21013_RESET reg write failed\n"); + return retval; + } + msleep(RESET_DELAY); + + retval = i2c_smbus_write_byte_data(i2c, BU21013_SENSOR_0_7_REG, + BU21013_SENSORS_EN_0_7); + if (retval < 0) { + dev_err(&i2c->dev, "BU21013_SENSOR_0_7 reg write failed\n"); + return retval; + } + + retval = i2c_smbus_write_byte_data(i2c, BU21013_SENSOR_8_15_REG, + BU21013_SENSORS_EN_8_15); + if (retval < 0) { + dev_err(&i2c->dev, "BU21013_SENSOR_8_15 reg write failed\n"); + return retval; + } + + retval = i2c_smbus_write_byte_data(i2c, BU21013_SENSOR_16_23_REG, + BU21013_SENSORS_EN_16_23); + if (retval < 0) { + dev_err(&i2c->dev, "BU21013_SENSOR_16_23 reg write failed\n"); + return retval; + } + + retval = i2c_smbus_write_byte_data(i2c, BU21013_POS_MODE1_REG, + (BU21013_POS_MODE1_0 | BU21013_POS_MODE1_1)); + if (retval < 0) { + dev_err(&i2c->dev, "BU21013_POS_MODE1 reg write failed\n"); + return retval; + } + + retval = i2c_smbus_write_byte_data(i2c, BU21013_POS_MODE2_REG, + (BU21013_POS_MODE2_ZERO | BU21013_POS_MODE2_AVG1 | + BU21013_POS_MODE2_AVG2 | BU21013_POS_MODE2_EN_RAW | + BU21013_POS_MODE2_MULTI)); + if (retval < 0) { + dev_err(&i2c->dev, "BU21013_POS_MODE2 reg write failed\n"); + return retval; + } + + if (data->chip->ext_clk) + retval = i2c_smbus_write_byte_data(i2c, BU21013_CLK_MODE_REG, + (BU21013_CLK_MODE_EXT | BU21013_CLK_MODE_CALIB)); + else + retval = i2c_smbus_write_byte_data(i2c, BU21013_CLK_MODE_REG, + (BU21013_CLK_MODE_DIV | BU21013_CLK_MODE_CALIB)); + if (retval < 0) { + dev_err(&i2c->dev, "BU21013_CLK_MODE reg write failed\n"); + return retval; + } + + retval = i2c_smbus_write_byte_data(i2c, BU21013_IDLE_REG, + (BU21013_IDLET_0 | BU21013_IDLE_INTERMIT_EN)); + if (retval < 0) { + dev_err(&i2c->dev, "BU21013_IDLE reg write failed\n"); + return retval; + } + + retval = i2c_smbus_write_byte_data(i2c, BU21013_INT_MODE_REG, + BU21013_INT_MODE_LEVEL); + if (retval < 0) { + dev_err(&i2c->dev, "BU21013_INT_MODE reg write failed\n"); + return retval; + } + + retval = i2c_smbus_write_byte_data(i2c, BU21013_FILTER_REG, + (BU21013_DELTA_0_6 | + BU21013_FILTER_EN)); + if (retval < 0) { + dev_err(&i2c->dev, "BU21013_FILTER reg write failed\n"); + return retval; + } + + retval = i2c_smbus_write_byte_data(i2c, BU21013_TH_ON_REG, + BU21013_TH_ON_5); + if (retval < 0) { + dev_err(&i2c->dev, "BU21013_TH_ON reg write failed\n"); + return retval; + } + + retval = i2c_smbus_write_byte_data(i2c, BU21013_TH_OFF_REG, + BU21013_TH_OFF_4 || BU21013_TH_OFF_3); + if (retval < 0) { + dev_err(&i2c->dev, "BU21013_TH_OFF reg write failed\n"); + return retval; + } + + retval = i2c_smbus_write_byte_data(i2c, BU21013_GAIN_REG, + (BU21013_GAIN_0 | BU21013_GAIN_1)); + if (retval < 0) { + dev_err(&i2c->dev, "BU21013_GAIN reg write failed\n"); + return retval; + } + + retval = i2c_smbus_write_byte_data(i2c, BU21013_OFFSET_MODE_REG, + BU21013_OFFSET_MODE_DEFAULT); + if (retval < 0) { + dev_err(&i2c->dev, "BU21013_OFFSET_MODE reg write failed\n"); + return retval; + } + + retval = i2c_smbus_write_byte_data(i2c, BU21013_XY_EDGE_REG, + (BU21013_X_EDGE_0 | BU21013_X_EDGE_2 | + BU21013_Y_EDGE_1 | BU21013_Y_EDGE_3)); + if (retval < 0) { + dev_err(&i2c->dev, "BU21013_XY_EDGE reg write failed\n"); + return retval; + } + + retval = i2c_smbus_write_byte_data(i2c, BU21013_DONE_REG, + BU21013_DONE); + if (retval < 0) { + dev_err(&i2c->dev, "BU21013_REG_DONE reg write failed\n"); + return retval; + } + + return 0; +} + +/** + * bu21013_free_irq() - frees IRQ registered for touchscreen + * @bu21013_data: device structure pointer + * + * This function signals interrupt thread to stop processing and + * frees interrupt. + */ +static void bu21013_free_irq(struct bu21013_ts_data *bu21013_data) +{ + bu21013_data->touch_stopped = true; + wake_up(&bu21013_data->wait); + free_irq(bu21013_data->chip->irq, bu21013_data); +} + +/** + * bu21013_probe() - initializes the i2c-client touchscreen driver + * @client: i2c client structure pointer + * @id: i2c device id pointer + * + * This function used to initializes the i2c-client touchscreen + * driver and returns integer. + */ +static int __devinit bu21013_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct bu21013_ts_data *bu21013_data; + struct input_dev *in_dev; + const struct bu21013_platform_device *pdata = + client->dev.platform_data; + int error; + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_BYTE_DATA)) { + dev_err(&client->dev, "i2c smbus byte data not supported\n"); + return -EIO; + } + + if (!pdata) { + dev_err(&client->dev, "platform data not defined\n"); + return -EINVAL; + } + + bu21013_data = kzalloc(sizeof(struct bu21013_ts_data), GFP_KERNEL); + in_dev = input_allocate_device(); + if (!bu21013_data || !in_dev) { + dev_err(&client->dev, "device memory alloc failed\n"); + error = -ENOMEM; + goto err_free_mem; + } + + bu21013_data->in_dev = in_dev; + bu21013_data->chip = pdata; + bu21013_data->client = client; + bu21013_data->touch_stopped = false; + init_waitqueue_head(&bu21013_data->wait); + + /* configure the gpio pins */ + if (pdata->cs_en) { + error = pdata->cs_en(pdata->cs_pin); + if (error < 0) { + dev_err(&client->dev, "chip init failed\n"); + goto err_free_mem; + } + } + + /* configure the touch panel controller */ + error = bu21013_init_chip(bu21013_data); + if (error) { + dev_err(&client->dev, "error in bu21013 config\n"); + goto err_cs_disable; + } + + /* register the device to input subsystem */ + in_dev->name = DRIVER_TP; + in_dev->id.bustype = BUS_I2C; + in_dev->dev.parent = &client->dev; + + __set_bit(EV_SYN, in_dev->evbit); + __set_bit(EV_KEY, in_dev->evbit); + __set_bit(EV_ABS, in_dev->evbit); + + input_set_abs_params(in_dev, ABS_MT_POSITION_X, 0, + pdata->x_max_res, 0, 0); + input_set_abs_params(in_dev, ABS_MT_POSITION_Y, 0, + pdata->y_max_res, 0, 0); + input_set_drvdata(in_dev, bu21013_data); + + error = request_threaded_irq(pdata->irq, NULL, bu21013_gpio_irq, + IRQF_TRIGGER_FALLING | IRQF_SHARED, + DRIVER_TP, bu21013_data); + if (error) { + dev_err(&client->dev, "request irq %d failed\n", pdata->irq); + goto err_cs_disable; + } + + error = input_register_device(in_dev); + if (error) { + dev_err(&client->dev, "failed to register input device\n"); + goto err_free_irq; + } + + device_init_wakeup(&client->dev, pdata->wakeup); + i2c_set_clientdata(client, bu21013_data); + + return 0; + +err_free_irq: + bu21013_free_irq(bu21013_data); +err_cs_disable: + pdata->cs_dis(pdata->cs_pin); +err_free_mem: + input_free_device(in_dev); + kfree(bu21013_data); + + return error; +} +/** + * bu21013_remove() - removes the i2c-client touchscreen driver + * @client: i2c client structure pointer + * + * This function uses to remove the i2c-client + * touchscreen driver and returns integer. + */ +static int __devexit bu21013_remove(struct i2c_client *client) +{ + struct bu21013_ts_data *bu21013_data = i2c_get_clientdata(client); + + bu21013_free_irq(bu21013_data); + + bu21013_data->chip->cs_dis(bu21013_data->chip->cs_pin); + + input_unregister_device(bu21013_data->in_dev); + kfree(bu21013_data); + + device_init_wakeup(&client->dev, false); + + return 0; +} + +#ifdef CONFIG_PM +/** + * bu21013_suspend() - suspend the touch screen controller + * @dev: pointer to device structure + * + * This function is used to suspend the + * touch panel controller and returns integer + */ +static int bu21013_suspend(struct device *dev) +{ + struct bu21013_ts_data *bu21013_data = dev_get_drvdata(dev); + struct i2c_client *client = bu21013_data->client; + + bu21013_data->touch_stopped = true; + if (device_may_wakeup(&client->dev)) + enable_irq_wake(bu21013_data->chip->irq); + else + disable_irq(bu21013_data->chip->irq); + + return 0; +} + +/** + * bu21013_resume() - resume the touch screen controller + * @dev: pointer to device structure + * + * This function is used to resume the touch panel + * controller and returns integer. + */ +static int bu21013_resume(struct device *dev) +{ + struct bu21013_ts_data *bu21013_data = dev_get_drvdata(dev); + struct i2c_client *client = bu21013_data->client; + int retval; + + retval = bu21013_init_chip(bu21013_data); + if (retval < 0) { + dev_err(&client->dev, "bu21013 controller config failed\n"); + return retval; + } + + bu21013_data->touch_stopped = false; + + if (device_may_wakeup(&client->dev)) + disable_irq_wake(bu21013_data->chip->irq); + else + enable_irq(bu21013_data->chip->irq); + + return 0; +} + +static const struct dev_pm_ops bu21013_dev_pm_ops = { + .suspend = bu21013_suspend, + .resume = bu21013_resume, +}; +#endif + +static const struct i2c_device_id bu21013_id[] = { + { DRIVER_TP, 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, bu21013_id); + +static struct i2c_driver bu21013_driver = { + .driver = { + .name = DRIVER_TP, + .owner = THIS_MODULE, +#ifdef CONFIG_PM + .pm = &bu21013_dev_pm_ops, +#endif + }, + .probe = bu21013_probe, + .remove = __devexit_p(bu21013_remove), + .id_table = bu21013_id, +}; + +/** + * bu21013_init() - initializes the bu21013 touchscreen driver + * + * This function used to initializes the bu21013 + * touchscreen driver and returns integer. + */ +static int __init bu21013_init(void) +{ + return i2c_add_driver(&bu21013_driver); +} + +/** + * bu21013_exit() - de-initializes the bu21013 touchscreen driver + * + * This function uses to de-initializes the bu21013 + * touchscreen driver and returns none. + */ +static void __exit bu21013_exit(void) +{ + i2c_del_driver(&bu21013_driver); +} + +module_init(bu21013_init); +module_exit(bu21013_exit); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Naveen Kumar G <naveen.gaddipati@stericsson.com>"); +MODULE_DESCRIPTION("bu21013 touch screen controller driver"); diff --git a/drivers/input/touchscreen/cy8ctmg110_ts.c b/drivers/input/touchscreen/cy8ctmg110_ts.c new file mode 100644 index 000000000000..d0c3a7229adf --- /dev/null +++ b/drivers/input/touchscreen/cy8ctmg110_ts.c @@ -0,0 +1,363 @@ +/* + * Driver for cypress touch screen controller + * + * Copyright (c) 2009 Aava Mobile + * + * Some cleanups by Alan Cox <alan@linux.intel.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/input.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/i2c.h> +#include <linux/gpio.h> +#include <linux/input/cy8ctmg110_pdata.h> + +#define CY8CTMG110_DRIVER_NAME "cy8ctmg110" + +/* Touch coordinates */ +#define CY8CTMG110_X_MIN 0 +#define CY8CTMG110_Y_MIN 0 +#define CY8CTMG110_X_MAX 759 +#define CY8CTMG110_Y_MAX 465 + + +/* cy8ctmg110 register definitions */ +#define CY8CTMG110_TOUCH_WAKEUP_TIME 0 +#define CY8CTMG110_TOUCH_SLEEP_TIME 2 +#define CY8CTMG110_TOUCH_X1 3 +#define CY8CTMG110_TOUCH_Y1 5 +#define CY8CTMG110_TOUCH_X2 7 +#define CY8CTMG110_TOUCH_Y2 9 +#define CY8CTMG110_FINGERS 11 +#define CY8CTMG110_GESTURE 12 +#define CY8CTMG110_REG_MAX 13 + + +/* + * The touch driver structure. + */ +struct cy8ctmg110 { + struct input_dev *input; + char phys[32]; + struct i2c_client *client; + int reset_pin; + int irq_pin; +}; + +/* + * cy8ctmg110_power is the routine that is called when touch hardware + * will powered off or on. + */ +static void cy8ctmg110_power(struct cy8ctmg110 *ts, bool poweron) +{ + if (ts->reset_pin) + gpio_direction_output(ts->reset_pin, 1 - poweron); +} + +static int cy8ctmg110_write_regs(struct cy8ctmg110 *tsc, unsigned char reg, + unsigned char len, unsigned char *value) +{ + struct i2c_client *client = tsc->client; + int ret; + unsigned char i2c_data[6]; + + BUG_ON(len > 5); + + i2c_data[0] = reg; + memcpy(i2c_data + 1, value, len); + + ret = i2c_master_send(client, i2c_data, len + 1); + if (ret != 1) { + dev_err(&client->dev, "i2c write data cmd failed\n"); + return ret ? ret : -EIO; + } + + return 0; +} + +static int cy8ctmg110_read_regs(struct cy8ctmg110 *tsc, + unsigned char *data, unsigned char len, unsigned char cmd) +{ + struct i2c_client *client = tsc->client; + int ret; + struct i2c_msg msg[2] = { + /* first write slave position to i2c devices */ + { client->addr, 0, 1, &cmd }, + /* Second read data from position */ + { client->addr, I2C_M_RD, len, data } + }; + + ret = i2c_transfer(client->adapter, msg, 2); + if (ret < 0) + return ret; + + return 0; +} + +static int cy8ctmg110_touch_pos(struct cy8ctmg110 *tsc) +{ + struct input_dev *input = tsc->input; + unsigned char reg_p[CY8CTMG110_REG_MAX]; + int x, y; + + memset(reg_p, 0, CY8CTMG110_REG_MAX); + + /* Reading coordinates */ + if (cy8ctmg110_read_regs(tsc, reg_p, 9, CY8CTMG110_TOUCH_X1) != 0) + return -EIO; + + y = reg_p[2] << 8 | reg_p[3]; + x = reg_p[0] << 8 | reg_p[1]; + + /* Number of touch */ + if (reg_p[8] == 0) { + input_report_key(input, BTN_TOUCH, 0); + } else { + input_report_key(input, BTN_TOUCH, 1); + input_report_abs(input, ABS_X, x); + input_report_abs(input, ABS_Y, y); + } + + input_sync(input); + + return 0; +} + +static int cy8ctmg110_set_sleepmode(struct cy8ctmg110 *ts, bool sleep) +{ + unsigned char reg_p[3]; + + if (sleep) { + reg_p[0] = 0x00; + reg_p[1] = 0xff; + reg_p[2] = 5; + } else { + reg_p[0] = 0x10; + reg_p[1] = 0xff; + reg_p[2] = 0; + } + + return cy8ctmg110_write_regs(ts, CY8CTMG110_TOUCH_WAKEUP_TIME, 3, reg_p); +} + +static irqreturn_t cy8ctmg110_irq_thread(int irq, void *dev_id) +{ + struct cy8ctmg110 *tsc = dev_id; + + cy8ctmg110_touch_pos(tsc); + + return IRQ_HANDLED; +} + +static int __devinit cy8ctmg110_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + const struct cy8ctmg110_pdata *pdata = client->dev.platform_data; + struct cy8ctmg110 *ts; + struct input_dev *input_dev; + int err; + + /* No pdata no way forward */ + if (pdata == NULL) { + dev_err(&client->dev, "no pdata\n"); + return -ENODEV; + } + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_READ_WORD_DATA)) + return -EIO; + + ts = kzalloc(sizeof(struct cy8ctmg110), GFP_KERNEL); + input_dev = input_allocate_device(); + if (!ts || !input_dev) { + err = -ENOMEM; + goto err_free_mem; + } + + ts->client = client; + ts->input = input_dev; + + snprintf(ts->phys, sizeof(ts->phys), + "%s/input0", dev_name(&client->dev)); + + input_dev->name = CY8CTMG110_DRIVER_NAME " Touchscreen"; + input_dev->phys = ts->phys; + input_dev->id.bustype = BUS_I2C; + input_dev->dev.parent = &client->dev; + + input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); + input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); + + input_set_abs_params(input_dev, ABS_X, + CY8CTMG110_X_MIN, CY8CTMG110_X_MAX, 4, 0); + input_set_abs_params(input_dev, ABS_Y, + CY8CTMG110_Y_MIN, CY8CTMG110_Y_MAX, 4, 0); + + if (ts->reset_pin) { + err = gpio_request(ts->reset_pin, NULL); + if (err) { + dev_err(&client->dev, + "Unable to request GPIO pin %d.\n", + ts->reset_pin); + goto err_free_mem; + } + } + + cy8ctmg110_power(ts, true); + cy8ctmg110_set_sleepmode(ts, false); + + err = gpio_request(ts->irq_pin, "touch_irq_key"); + if (err < 0) { + dev_err(&client->dev, + "Failed to request GPIO %d, error %d\n", + ts->irq_pin, err); + goto err_shutoff_device; + } + + err = gpio_direction_input(ts->irq_pin); + if (err < 0) { + dev_err(&client->dev, + "Failed to configure input direction for GPIO %d, error %d\n", + ts->irq_pin, err); + goto err_free_irq_gpio; + } + + client->irq = gpio_to_irq(ts->irq_pin); + if (client->irq < 0) { + err = client->irq; + dev_err(&client->dev, + "Unable to get irq number for GPIO %d, error %d\n", + ts->irq_pin, err); + goto err_free_irq_gpio; + } + + err = request_threaded_irq(client->irq, NULL, cy8ctmg110_irq_thread, + IRQF_TRIGGER_RISING, "touch_reset_key", ts); + if (err < 0) { + dev_err(&client->dev, + "irq %d busy? error %d\n", client->irq, err); + goto err_free_irq_gpio; + } + + err = input_register_device(input_dev); + if (err) + goto err_free_irq; + + i2c_set_clientdata(client, ts); + device_init_wakeup(&client->dev, 1); + return 0; + +err_free_irq: + free_irq(client->irq, ts); +err_free_irq_gpio: + gpio_free(ts->irq_pin); +err_shutoff_device: + cy8ctmg110_set_sleepmode(ts, true); + cy8ctmg110_power(ts, false); + if (ts->reset_pin) + gpio_free(ts->reset_pin); +err_free_mem: + input_free_device(input_dev); + kfree(ts); + return err; +} + +#ifdef CONFIG_PM +static int cy8ctmg110_suspend(struct i2c_client *client, pm_message_t mesg) +{ + struct cy8ctmg110 *ts = i2c_get_clientdata(client); + + if (device_may_wakeup(&client->dev)) + enable_irq_wake(client->irq); + else { + cy8ctmg110_set_sleepmode(ts, true); + cy8ctmg110_power(ts, false); + } + return 0; +} + +static int cy8ctmg110_resume(struct i2c_client *client) +{ + struct cy8ctmg110 *ts = i2c_get_clientdata(client); + + if (device_may_wakeup(&client->dev)) + disable_irq_wake(client->irq); + else { + cy8ctmg110_power(ts, true); + cy8ctmg110_set_sleepmode(ts, false); + } + return 0; +} +#endif + +static int __devexit cy8ctmg110_remove(struct i2c_client *client) +{ + struct cy8ctmg110 *ts = i2c_get_clientdata(client); + + cy8ctmg110_set_sleepmode(ts, true); + cy8ctmg110_power(ts, false); + + free_irq(client->irq, ts); + input_unregister_device(ts->input); + gpio_free(ts->irq_pin); + if (ts->reset_pin) + gpio_free(ts->reset_pin); + kfree(ts); + + return 0; +} + +static struct i2c_device_id cy8ctmg110_idtable[] = { + { CY8CTMG110_DRIVER_NAME, 1 }, + { } +}; + +MODULE_DEVICE_TABLE(i2c, cy8ctmg110_idtable); + +static struct i2c_driver cy8ctmg110_driver = { + .driver = { + .owner = THIS_MODULE, + .name = CY8CTMG110_DRIVER_NAME, + }, + .id_table = cy8ctmg110_idtable, + .probe = cy8ctmg110_probe, + .remove = __devexit_p(cy8ctmg110_remove), +#ifdef CONFIG_PM + .suspend = cy8ctmg110_suspend, + .resume = cy8ctmg110_resume, +#endif +}; + +static int __init cy8ctmg110_init(void) +{ + return i2c_add_driver(&cy8ctmg110_driver); +} + +static void __exit cy8ctmg110_exit(void) +{ + i2c_del_driver(&cy8ctmg110_driver); +} + +module_init(cy8ctmg110_init); +module_exit(cy8ctmg110_exit); + +MODULE_AUTHOR("Samuli Konttila <samuli.konttila@aavamobile.com>"); +MODULE_DESCRIPTION("cy8ctmg110 TouchScreen Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/input/touchscreen/hp680_ts_input.c b/drivers/input/touchscreen/hp680_ts_input.c index a89700e7ace4..dd4e8f020b99 100644 --- a/drivers/input/touchscreen/hp680_ts_input.c +++ b/drivers/input/touchscreen/hp680_ts_input.c @@ -28,29 +28,29 @@ static void do_softint(struct work_struct *work) u8 scpdr; int touched = 0; - if (ctrl_inb(PHDR) & PHDR_TS_PEN_DOWN) { - scpdr = ctrl_inb(SCPDR); + if (__raw_readb(PHDR) & PHDR_TS_PEN_DOWN) { + scpdr = __raw_readb(SCPDR); scpdr |= SCPDR_TS_SCAN_ENABLE; scpdr &= ~SCPDR_TS_SCAN_Y; - ctrl_outb(scpdr, SCPDR); + __raw_writeb(scpdr, SCPDR); udelay(30); absy = adc_single(ADC_CHANNEL_TS_Y); - scpdr = ctrl_inb(SCPDR); + scpdr = __raw_readb(SCPDR); scpdr |= SCPDR_TS_SCAN_Y; scpdr &= ~SCPDR_TS_SCAN_X; - ctrl_outb(scpdr, SCPDR); + __raw_writeb(scpdr, SCPDR); udelay(30); absx = adc_single(ADC_CHANNEL_TS_X); - scpdr = ctrl_inb(SCPDR); + scpdr = __raw_readb(SCPDR); scpdr |= SCPDR_TS_SCAN_X; scpdr &= ~SCPDR_TS_SCAN_ENABLE; - ctrl_outb(scpdr, SCPDR); + __raw_writeb(scpdr, SCPDR); udelay(100); - touched = ctrl_inb(PHDR) & PHDR_TS_PEN_DOWN; + touched = __raw_readb(PHDR) & PHDR_TS_PEN_DOWN; } if (touched) { @@ -107,8 +107,7 @@ static int __init hp680_ts_init(void) return 0; fail2: free_irq(HP680_TS_IRQ, NULL); - cancel_delayed_work(&work); - flush_scheduled_work(); + cancel_delayed_work_sync(&work); fail1: input_free_device(hp680_ts_dev); return err; } @@ -116,8 +115,7 @@ static int __init hp680_ts_init(void) static void __exit hp680_ts_exit(void) { free_irq(HP680_TS_IRQ, NULL); - cancel_delayed_work(&work); - flush_scheduled_work(); + cancel_delayed_work_sync(&work); input_unregister_device(hp680_ts_dev); } diff --git a/drivers/input/touchscreen/intel-mid-touch.c b/drivers/input/touchscreen/intel-mid-touch.c new file mode 100644 index 000000000000..c0307b22d86f --- /dev/null +++ b/drivers/input/touchscreen/intel-mid-touch.c @@ -0,0 +1,687 @@ +/* + * Intel MID Resistive Touch Screen Driver + * + * Copyright (C) 2008 Intel Corp + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. + * + * Questions/Comments/Bug fixes to Sreedhara (sreedhara.ds@intel.com) + * Ramesh Agarwal (ramesh.agarwal@intel.com) + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * TODO: + * review conversion of r/m/w sequences + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/input.h> +#include <linux/interrupt.h> +#include <linux/err.h> +#include <linux/param.h> +#include <linux/slab.h> +#include <linux/platform_device.h> +#include <linux/irq.h> +#include <linux/delay.h> +#include <asm/intel_scu_ipc.h> + +/* PMIC Interrupt registers */ +#define PMIC_REG_ID1 0x00 /* PMIC ID1 register */ + +/* PMIC Interrupt registers */ +#define PMIC_REG_INT 0x04 /* PMIC interrupt register */ +#define PMIC_REG_MINT 0x05 /* PMIC interrupt mask register */ + +/* ADC Interrupt registers */ +#define PMIC_REG_ADCINT 0x5F /* ADC interrupt register */ +#define PMIC_REG_MADCINT 0x60 /* ADC interrupt mask register */ + +/* ADC Control registers */ +#define PMIC_REG_ADCCNTL1 0x61 /* ADC control register */ + +/* ADC Channel Selection registers */ +#define PMICADDR0 0xA4 +#define END_OF_CHANNEL 0x1F + +/* ADC Result register */ +#define PMIC_REG_ADCSNS0H 0x64 + +/* ADC channels for touch screen */ +#define MRST_TS_CHAN10 0xA /* Touch screen X+ connection */ +#define MRST_TS_CHAN11 0xB /* Touch screen X- connection */ +#define MRST_TS_CHAN12 0xC /* Touch screen Y+ connection */ +#define MRST_TS_CHAN13 0xD /* Touch screen Y- connection */ + +/* Touch screen channel BIAS constants */ +#define MRST_XBIAS 0x20 +#define MRST_YBIAS 0x40 +#define MRST_ZBIAS 0x80 + +/* Touch screen coordinates */ +#define MRST_X_MIN 10 +#define MRST_X_MAX 1024 +#define MRST_X_FUZZ 5 +#define MRST_Y_MIN 10 +#define MRST_Y_MAX 1024 +#define MRST_Y_FUZZ 5 +#define MRST_PRESSURE_MIN 0 +#define MRST_PRESSURE_NOMINAL 50 +#define MRST_PRESSURE_MAX 100 + +#define WAIT_ADC_COMPLETION 10 /* msec */ + +/* PMIC ADC round robin delays */ +#define ADC_LOOP_DELAY0 0x0 /* Continuous loop */ +#define ADC_LOOP_DELAY1 0x1 /* 4.5 ms approximate */ + +/* PMIC Vendor Identifiers */ +#define PMIC_VENDOR_FS 0 /* PMIC vendor FreeScale */ +#define PMIC_VENDOR_MAXIM 1 /* PMIC vendor MAXIM */ +#define PMIC_VENDOR_NEC 2 /* PMIC vendor NEC */ +#define MRSTOUCH_MAX_CHANNELS 32 /* Maximum ADC channels */ + +/* Touch screen device structure */ +struct mrstouch_dev { + struct device *dev; /* device associated with touch screen */ + struct input_dev *input; + char phys[32]; + u16 asr; /* Address selection register */ + int irq; + unsigned int vendor; /* PMIC vendor */ + unsigned int rev; /* PMIC revision */ + + int (*read_prepare)(struct mrstouch_dev *tsdev); + int (*read)(struct mrstouch_dev *tsdev, u16 *x, u16 *y, u16 *z); + int (*read_finish)(struct mrstouch_dev *tsdev); +}; + + +/*************************** NEC and Maxim Interface ************************/ + +static int mrstouch_nec_adc_read_prepare(struct mrstouch_dev *tsdev) +{ + return intel_scu_ipc_update_register(PMIC_REG_MADCINT, 0, 0x20); +} + +/* + * Enables PENDET interrupt. + */ +static int mrstouch_nec_adc_read_finish(struct mrstouch_dev *tsdev) +{ + int err; + + err = intel_scu_ipc_update_register(PMIC_REG_MADCINT, 0x20, 0x20); + if (!err) + err = intel_scu_ipc_update_register(PMIC_REG_ADCCNTL1, 0, 0x05); + + return err; +} + +/* + * Reads PMIC ADC touch screen result + * Reads ADC storage registers for higher 7 and lower 3 bits and + * converts the two readings into a single value and turns off gain bit + */ +static int mrstouch_ts_chan_read(u16 offset, u16 chan, u16 *vp, u16 *vm) +{ + int err; + u16 result; + u32 res; + + result = PMIC_REG_ADCSNS0H + offset; + + if (chan == MRST_TS_CHAN12) + result += 4; + + err = intel_scu_ipc_ioread32(result, &res); + if (err) + return err; + + /* Mash the bits up */ + + *vp = (res & 0xFF) << 3; /* Highest 7 bits */ + *vp |= (res >> 8) & 0x07; /* Lower 3 bits */ + *vp &= 0x3FF; + + res >>= 16; + + *vm = (res & 0xFF) << 3; /* Highest 7 bits */ + *vm |= (res >> 8) & 0x07; /* Lower 3 bits */ + *vm &= 0x3FF; + + return 0; +} + +/* + * Enables X, Y and Z bias values + * Enables YPYM for X channels and XPXM for Y channels + */ +static int mrstouch_ts_bias_set(uint offset, uint bias) +{ + int count; + u16 chan, start; + u16 reg[4]; + u8 data[4]; + + chan = PMICADDR0 + offset; + start = MRST_TS_CHAN10; + + for (count = 0; count <= 3; count++) { + reg[count] = chan++; + data[count] = bias | (start + count); + } + + return intel_scu_ipc_writev(reg, data, 4); +} + +/* To read touch screen channel values */ +static int mrstouch_nec_adc_read(struct mrstouch_dev *tsdev, + u16 *x, u16 *y, u16 *z) +{ + int err; + u16 xm, ym, zm; + + /* configure Y bias for X channels */ + err = mrstouch_ts_bias_set(tsdev->asr, MRST_YBIAS); + if (err) + goto ipc_error; + + msleep(WAIT_ADC_COMPLETION); + + /* read x+ and x- channels */ + err = mrstouch_ts_chan_read(tsdev->asr, MRST_TS_CHAN10, x, &xm); + if (err) + goto ipc_error; + + /* configure x bias for y channels */ + err = mrstouch_ts_bias_set(tsdev->asr, MRST_XBIAS); + if (err) + goto ipc_error; + + msleep(WAIT_ADC_COMPLETION); + + /* read y+ and y- channels */ + err = mrstouch_ts_chan_read(tsdev->asr, MRST_TS_CHAN12, y, &ym); + if (err) + goto ipc_error; + + /* configure z bias for x and y channels */ + err = mrstouch_ts_bias_set(tsdev->asr, MRST_ZBIAS); + if (err) + goto ipc_error; + + msleep(WAIT_ADC_COMPLETION); + + /* read z+ and z- channels */ + err = mrstouch_ts_chan_read(tsdev->asr, MRST_TS_CHAN10, z, &zm); + if (err) + goto ipc_error; + + return 0; + +ipc_error: + dev_err(tsdev->dev, "ipc error during adc read\n"); + return err; +} + + +/*************************** Freescale Interface ************************/ + +static int mrstouch_fs_adc_read_prepare(struct mrstouch_dev *tsdev) +{ + int err, count; + u16 chan; + u16 reg[5]; + u8 data[5]; + + /* Stop the ADC */ + err = intel_scu_ipc_update_register(PMIC_REG_MADCINT, 0x00, 0x02); + if (err) + goto ipc_error; + + chan = PMICADDR0 + tsdev->asr; + + /* Set X BIAS */ + for (count = 0; count <= 3; count++) { + reg[count] = chan++; + data[count] = 0x2A; + } + reg[count] = chan++; /* Dummy */ + data[count] = 0; + + err = intel_scu_ipc_writev(reg, data, 5); + if (err) + goto ipc_error; + + msleep(WAIT_ADC_COMPLETION); + + /* Set Y BIAS */ + for (count = 0; count <= 3; count++) { + reg[count] = chan++; + data[count] = 0x4A; + } + reg[count] = chan++; /* Dummy */ + data[count] = 0; + + err = intel_scu_ipc_writev(reg, data, 5); + if (err) + goto ipc_error; + + msleep(WAIT_ADC_COMPLETION); + + /* Set Z BIAS */ + err = intel_scu_ipc_iowrite32(chan + 2, 0x8A8A8A8A); + if (err) + goto ipc_error; + + msleep(WAIT_ADC_COMPLETION); + + return 0; + +ipc_error: + dev_err(tsdev->dev, "ipc error during %s\n", __func__); + return err; +} + +static int mrstouch_fs_adc_read(struct mrstouch_dev *tsdev, + u16 *x, u16 *y, u16 *z) +{ + int err; + u16 result; + u16 reg[4]; + u8 data[4]; + + result = PMIC_REG_ADCSNS0H + tsdev->asr; + + reg[0] = result + 4; + reg[1] = result + 5; + reg[2] = result + 16; + reg[3] = result + 17; + + err = intel_scu_ipc_readv(reg, data, 4); + if (err) + goto ipc_error; + + *x = data[0] << 3; /* Higher 7 bits */ + *x |= data[1] & 0x7; /* Lower 3 bits */ + *x &= 0x3FF; + + *y = data[2] << 3; /* Higher 7 bits */ + *y |= data[3] & 0x7; /* Lower 3 bits */ + *y &= 0x3FF; + + /* Read Z value */ + reg[0] = result + 28; + reg[1] = result + 29; + + err = intel_scu_ipc_readv(reg, data, 4); + if (err) + goto ipc_error; + + *z = data[0] << 3; /* Higher 7 bits */ + *z |= data[1] & 0x7; /* Lower 3 bits */ + *z &= 0x3FF; + + return 0; + +ipc_error: + dev_err(tsdev->dev, "ipc error during %s\n", __func__); + return err; +} + +static int mrstouch_fs_adc_read_finish(struct mrstouch_dev *tsdev) +{ + int err, count; + u16 chan; + u16 reg[5]; + u8 data[5]; + + /* Clear all TS channels */ + chan = PMICADDR0 + tsdev->asr; + for (count = 0; count <= 4; count++) { + reg[count] = chan++; + data[count] = 0; + } + err = intel_scu_ipc_writev(reg, data, 5); + if (err) + goto ipc_error; + + for (count = 0; count <= 4; count++) { + reg[count] = chan++; + data[count] = 0; + } + err = intel_scu_ipc_writev(reg, data, 5); + if (err) + goto ipc_error; + + err = intel_scu_ipc_iowrite32(chan + 2, 0x00000000); + if (err) + goto ipc_error; + + /* Start ADC */ + err = intel_scu_ipc_update_register(PMIC_REG_MADCINT, 0x02, 0x02); + if (err) + goto ipc_error; + + return 0; + +ipc_error: + dev_err(tsdev->dev, "ipc error during %s\n", __func__); + return err; +} + +static void mrstouch_report_event(struct input_dev *input, + unsigned int x, unsigned int y, unsigned int z) +{ + if (z > MRST_PRESSURE_NOMINAL) { + /* Pen touched, report button touch and coordinates */ + input_report_key(input, BTN_TOUCH, 1); + input_report_abs(input, ABS_X, x); + input_report_abs(input, ABS_Y, y); + } else { + input_report_key(input, BTN_TOUCH, 0); + } + + input_report_abs(input, ABS_PRESSURE, z); + input_sync(input); +} + +/* PENDET interrupt handler */ +static irqreturn_t mrstouch_pendet_irq(int irq, void *dev_id) +{ + struct mrstouch_dev *tsdev = dev_id; + u16 x, y, z; + + /* + * Should we lower thread priority? Probably not, since we are + * not spinning but sleeping... + */ + + if (tsdev->read_prepare(tsdev)) + goto out; + + do { + if (tsdev->read(tsdev, &x, &y, &z)) + break; + + mrstouch_report_event(tsdev->input, x, y, z); + } while (z > MRST_PRESSURE_NOMINAL); + + tsdev->read_finish(tsdev); + +out: + return IRQ_HANDLED; +} + +/* Utility to read PMIC ID */ +static int __devinit mrstouch_read_pmic_id(uint *vendor, uint *rev) +{ + int err; + u8 r; + + err = intel_scu_ipc_ioread8(PMIC_REG_ID1, &r); + if (err) + return err; + + *vendor = r & 0x7; + *rev = (r >> 3) & 0x7; + + return 0; +} + +/* + * Parse ADC channels to find end of the channel configured by other ADC user + * NEC and MAXIM requires 4 channels and FreeScale needs 18 channels + */ +static int __devinit mrstouch_chan_parse(struct mrstouch_dev *tsdev) +{ + int err, i, found; + u8 r8; + + found = -1; + + for (i = 0; i < MRSTOUCH_MAX_CHANNELS; i++) { + if (found >= 0) + break; + + err = intel_scu_ipc_ioread8(PMICADDR0 + i, &r8); + if (err) + return err; + + if (r8 == END_OF_CHANNEL) { + found = i; + break; + } + } + if (found < 0) + return 0; + + if (tsdev->vendor == PMIC_VENDOR_FS) { + if (found && found > (MRSTOUCH_MAX_CHANNELS - 18)) + return -ENOSPC; + } else { + if (found && found > (MRSTOUCH_MAX_CHANNELS - 4)) + return -ENOSPC; + } + return found; +} + + +/* + * Writes touch screen channels to ADC address selection registers + */ +static int __devinit mrstouch_ts_chan_set(uint offset) +{ + u16 chan; + + int ret, count; + + chan = PMICADDR0 + offset; + for (count = 0; count <= 3; count++) { + ret = intel_scu_ipc_iowrite8(chan++, MRST_TS_CHAN10 + count); + if (ret) + return ret; + } + return intel_scu_ipc_iowrite8(chan++, END_OF_CHANNEL); +} + +/* Initialize ADC */ +static int __devinit mrstouch_adc_init(struct mrstouch_dev *tsdev) +{ + int err, start; + u8 ra, rm; + + err = mrstouch_read_pmic_id(&tsdev->vendor, &tsdev->rev); + if (err) { + dev_err(tsdev->dev, "Unable to read PMIC id\n"); + return err; + } + + switch (tsdev->vendor) { + case PMIC_VENDOR_NEC: + case PMIC_VENDOR_MAXIM: + tsdev->read_prepare = mrstouch_nec_adc_read_prepare; + tsdev->read = mrstouch_nec_adc_read; + tsdev->read_finish = mrstouch_nec_adc_read_finish; + break; + + case PMIC_VENDOR_FS: + tsdev->read_prepare = mrstouch_fs_adc_read_prepare; + tsdev->read = mrstouch_fs_adc_read; + tsdev->read_finish = mrstouch_fs_adc_read_finish; + break; + + default: + dev_err(tsdev->dev, + "Unsupported touchscreen: %d\n", tsdev->vendor); + return -ENXIO; + } + + start = mrstouch_chan_parse(tsdev); + if (start < 0) { + dev_err(tsdev->dev, "Unable to parse channels\n"); + return start; + } + + tsdev->asr = start; + + /* + * ADC power on, start, enable PENDET and set loop delay + * ADC loop delay is set to 4.5 ms approximately + * Loop delay more than this results in jitter in adc readings + * Setting loop delay to 0 (continous loop) in MAXIM stops PENDET + * interrupt generation sometimes. + */ + + if (tsdev->vendor == PMIC_VENDOR_FS) { + ra = 0xE0 | ADC_LOOP_DELAY0; + rm = 0x5; + } else { + /* NEC and MAXIm not consistent with loop delay 0 */ + ra = 0xE0 | ADC_LOOP_DELAY1; + rm = 0x0; + + /* configure touch screen channels */ + err = mrstouch_ts_chan_set(tsdev->asr); + if (err) + return err; + } + + err = intel_scu_ipc_update_register(PMIC_REG_ADCCNTL1, ra, 0xE7); + if (err) + return err; + + err = intel_scu_ipc_update_register(PMIC_REG_MADCINT, rm, 0x03); + if (err) + return err; + + return 0; +} + + +/* Probe function for touch screen driver */ +static int __devinit mrstouch_probe(struct platform_device *pdev) +{ + struct mrstouch_dev *tsdev; + struct input_dev *input; + int err; + int irq; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(&pdev->dev, "no interrupt assigned\n"); + return -EINVAL; + } + + tsdev = kzalloc(sizeof(struct mrstouch_dev), GFP_KERNEL); + input = input_allocate_device(); + if (!tsdev || !input) { + dev_err(&pdev->dev, "unable to allocate memory\n"); + err = -ENOMEM; + goto err_free_mem; + } + + tsdev->dev = &pdev->dev; + tsdev->input = input; + tsdev->irq = irq; + + snprintf(tsdev->phys, sizeof(tsdev->phys), + "%s/input0", dev_name(tsdev->dev)); + + err = mrstouch_adc_init(tsdev); + if (err) { + dev_err(&pdev->dev, "ADC initialization failed\n"); + goto err_free_mem; + } + + input->name = "mrst_touchscreen"; + input->phys = tsdev->phys; + input->dev.parent = tsdev->dev; + + input->id.vendor = tsdev->vendor; + input->id.version = tsdev->rev; + + input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); + input->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); + + input_set_abs_params(tsdev->input, ABS_X, + MRST_X_MIN, MRST_X_MAX, MRST_X_FUZZ, 0); + input_set_abs_params(tsdev->input, ABS_Y, + MRST_Y_MIN, MRST_Y_MAX, MRST_Y_FUZZ, 0); + input_set_abs_params(tsdev->input, ABS_PRESSURE, + MRST_PRESSURE_MIN, MRST_PRESSURE_MAX, 0, 0); + + err = request_threaded_irq(tsdev->irq, NULL, mrstouch_pendet_irq, + 0, "mrstouch", tsdev); + if (err) { + dev_err(tsdev->dev, "unable to allocate irq\n"); + goto err_free_mem; + } + + err = input_register_device(tsdev->input); + if (err) { + dev_err(tsdev->dev, "unable to register input device\n"); + goto err_free_irq; + } + + platform_set_drvdata(pdev, tsdev); + return 0; + +err_free_irq: + free_irq(tsdev->irq, tsdev); +err_free_mem: + input_free_device(input); + kfree(tsdev); + return err; +} + +static int __devexit mrstouch_remove(struct platform_device *pdev) +{ + struct mrstouch_dev *tsdev = platform_get_drvdata(pdev); + + free_irq(tsdev->irq, tsdev); + input_unregister_device(tsdev->input); + kfree(tsdev); + + platform_set_drvdata(pdev, NULL); + + return 0; +} + +static struct platform_driver mrstouch_driver = { + .driver = { + .name = "pmic_touch", + .owner = THIS_MODULE, + }, + .probe = mrstouch_probe, + .remove = __devexit_p(mrstouch_remove), +}; + +static int __init mrstouch_init(void) +{ + return platform_driver_register(&mrstouch_driver); +} +module_init(mrstouch_init); + +static void __exit mrstouch_exit(void) +{ + platform_driver_unregister(&mrstouch_driver); +} +module_exit(mrstouch_exit); + +MODULE_AUTHOR("Sreedhara Murthy. D.S, sreedhara.ds@intel.com"); +MODULE_DESCRIPTION("Intel Moorestown Resistive Touch Screen Driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/input/touchscreen/lpc32xx_ts.c b/drivers/input/touchscreen/lpc32xx_ts.c new file mode 100644 index 000000000000..dcf803f5a1f7 --- /dev/null +++ b/drivers/input/touchscreen/lpc32xx_ts.c @@ -0,0 +1,411 @@ +/* + * LPC32xx built-in touchscreen driver + * + * Copyright (C) 2010 NXP Semiconductors + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/platform_device.h> +#include <linux/init.h> +#include <linux/input.h> +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/clk.h> +#include <linux/io.h> +#include <linux/slab.h> + +/* + * Touchscreen controller register offsets + */ +#define LPC32XX_TSC_STAT 0x00 +#define LPC32XX_TSC_SEL 0x04 +#define LPC32XX_TSC_CON 0x08 +#define LPC32XX_TSC_FIFO 0x0C +#define LPC32XX_TSC_DTR 0x10 +#define LPC32XX_TSC_RTR 0x14 +#define LPC32XX_TSC_UTR 0x18 +#define LPC32XX_TSC_TTR 0x1C +#define LPC32XX_TSC_DXP 0x20 +#define LPC32XX_TSC_MIN_X 0x24 +#define LPC32XX_TSC_MAX_X 0x28 +#define LPC32XX_TSC_MIN_Y 0x2C +#define LPC32XX_TSC_MAX_Y 0x30 +#define LPC32XX_TSC_AUX_UTR 0x34 +#define LPC32XX_TSC_AUX_MIN 0x38 +#define LPC32XX_TSC_AUX_MAX 0x3C + +#define LPC32XX_TSC_STAT_FIFO_OVRRN (1 << 8) +#define LPC32XX_TSC_STAT_FIFO_EMPTY (1 << 7) + +#define LPC32XX_TSC_SEL_DEFVAL 0x0284 + +#define LPC32XX_TSC_ADCCON_IRQ_TO_FIFO_4 (0x1 << 11) +#define LPC32XX_TSC_ADCCON_X_SAMPLE_SIZE(s) ((10 - (s)) << 7) +#define LPC32XX_TSC_ADCCON_Y_SAMPLE_SIZE(s) ((10 - (s)) << 4) +#define LPC32XX_TSC_ADCCON_POWER_UP (1 << 2) +#define LPC32XX_TSC_ADCCON_AUTO_EN (1 << 0) + +#define LPC32XX_TSC_FIFO_TS_P_LEVEL (1 << 31) +#define LPC32XX_TSC_FIFO_NORMALIZE_X_VAL(x) (((x) & 0x03FF0000) >> 16) +#define LPC32XX_TSC_FIFO_NORMALIZE_Y_VAL(y) ((y) & 0x000003FF) + +#define LPC32XX_TSC_ADCDAT_VALUE_MASK 0x000003FF + +#define LPC32XX_TSC_MIN_XY_VAL 0x0 +#define LPC32XX_TSC_MAX_XY_VAL 0x3FF + +#define MOD_NAME "ts-lpc32xx" + +#define tsc_readl(dev, reg) \ + __raw_readl((dev)->tsc_base + (reg)) +#define tsc_writel(dev, reg, val) \ + __raw_writel((val), (dev)->tsc_base + (reg)) + +struct lpc32xx_tsc { + struct input_dev *dev; + void __iomem *tsc_base; + int irq; + struct clk *clk; +}; + +static void lpc32xx_fifo_clear(struct lpc32xx_tsc *tsc) +{ + while (!(tsc_readl(tsc, LPC32XX_TSC_STAT) & + LPC32XX_TSC_STAT_FIFO_EMPTY)) + tsc_readl(tsc, LPC32XX_TSC_FIFO); +} + +static irqreturn_t lpc32xx_ts_interrupt(int irq, void *dev_id) +{ + u32 tmp, rv[4], xs[4], ys[4]; + int idx; + struct lpc32xx_tsc *tsc = dev_id; + struct input_dev *input = tsc->dev; + + tmp = tsc_readl(tsc, LPC32XX_TSC_STAT); + + if (tmp & LPC32XX_TSC_STAT_FIFO_OVRRN) { + /* FIFO overflow - throw away samples */ + lpc32xx_fifo_clear(tsc); + return IRQ_HANDLED; + } + + /* + * Gather and normalize 4 samples. Pen-up events may have less + * than 4 samples, but its ok to pop 4 and let the last sample + * pen status check drop the samples. + */ + idx = 0; + while (idx < 4 && + !(tsc_readl(tsc, LPC32XX_TSC_STAT) & + LPC32XX_TSC_STAT_FIFO_EMPTY)) { + tmp = tsc_readl(tsc, LPC32XX_TSC_FIFO); + xs[idx] = LPC32XX_TSC_ADCDAT_VALUE_MASK - + LPC32XX_TSC_FIFO_NORMALIZE_X_VAL(tmp); + ys[idx] = LPC32XX_TSC_ADCDAT_VALUE_MASK - + LPC32XX_TSC_FIFO_NORMALIZE_Y_VAL(tmp); + rv[idx] = tmp; + idx++; + } + + /* Data is only valid if pen is still down in last sample */ + if (!(rv[3] & LPC32XX_TSC_FIFO_TS_P_LEVEL) && idx == 4) { + /* Use average of 2nd and 3rd sample for position */ + input_report_abs(input, ABS_X, (xs[1] + xs[2]) / 2); + input_report_abs(input, ABS_Y, (ys[1] + ys[2]) / 2); + input_report_key(input, BTN_TOUCH, 1); + } else { + input_report_key(input, BTN_TOUCH, 0); + } + + input_sync(input); + + return IRQ_HANDLED; +} + +static void lpc32xx_stop_tsc(struct lpc32xx_tsc *tsc) +{ + /* Disable auto mode */ + tsc_writel(tsc, LPC32XX_TSC_CON, + tsc_readl(tsc, LPC32XX_TSC_CON) & + ~LPC32XX_TSC_ADCCON_AUTO_EN); + + clk_disable(tsc->clk); +} + +static void lpc32xx_setup_tsc(struct lpc32xx_tsc *tsc) +{ + u32 tmp; + + clk_enable(tsc->clk); + + tmp = tsc_readl(tsc, LPC32XX_TSC_CON) & ~LPC32XX_TSC_ADCCON_POWER_UP; + + /* Set the TSC FIFO depth to 4 samples @ 10-bits per sample (max) */ + tmp = LPC32XX_TSC_ADCCON_IRQ_TO_FIFO_4 | + LPC32XX_TSC_ADCCON_X_SAMPLE_SIZE(10) | + LPC32XX_TSC_ADCCON_Y_SAMPLE_SIZE(10); + tsc_writel(tsc, LPC32XX_TSC_CON, tmp); + + /* These values are all preset */ + tsc_writel(tsc, LPC32XX_TSC_SEL, LPC32XX_TSC_SEL_DEFVAL); + tsc_writel(tsc, LPC32XX_TSC_MIN_X, LPC32XX_TSC_MIN_XY_VAL); + tsc_writel(tsc, LPC32XX_TSC_MAX_X, LPC32XX_TSC_MAX_XY_VAL); + tsc_writel(tsc, LPC32XX_TSC_MIN_Y, LPC32XX_TSC_MIN_XY_VAL); + tsc_writel(tsc, LPC32XX_TSC_MAX_Y, LPC32XX_TSC_MAX_XY_VAL); + + /* Aux support is not used */ + tsc_writel(tsc, LPC32XX_TSC_AUX_UTR, 0); + tsc_writel(tsc, LPC32XX_TSC_AUX_MIN, 0); + tsc_writel(tsc, LPC32XX_TSC_AUX_MAX, 0); + + /* + * Set sample rate to about 240Hz per X/Y pair. A single measurement + * consists of 4 pairs which gives about a 60Hz sample rate based on + * a stable 32768Hz clock source. Values are in clocks. + * Rate is (32768 / (RTR + XCONV + RTR + YCONV + DXP + TTR + UTR) / 4 + */ + tsc_writel(tsc, LPC32XX_TSC_RTR, 0x2); + tsc_writel(tsc, LPC32XX_TSC_DTR, 0x2); + tsc_writel(tsc, LPC32XX_TSC_TTR, 0x10); + tsc_writel(tsc, LPC32XX_TSC_DXP, 0x4); + tsc_writel(tsc, LPC32XX_TSC_UTR, 88); + + lpc32xx_fifo_clear(tsc); + + /* Enable automatic ts event capture */ + tsc_writel(tsc, LPC32XX_TSC_CON, tmp | LPC32XX_TSC_ADCCON_AUTO_EN); +} + +static int lpc32xx_ts_open(struct input_dev *dev) +{ + struct lpc32xx_tsc *tsc = input_get_drvdata(dev); + + lpc32xx_setup_tsc(tsc); + + return 0; +} + +static void lpc32xx_ts_close(struct input_dev *dev) +{ + struct lpc32xx_tsc *tsc = input_get_drvdata(dev); + + lpc32xx_stop_tsc(tsc); +} + +static int __devinit lpc32xx_ts_probe(struct platform_device *pdev) +{ + struct lpc32xx_tsc *tsc; + struct input_dev *input; + struct resource *res; + resource_size_t size; + int irq; + int error; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "Can't get memory resource\n"); + return -ENOENT; + } + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(&pdev->dev, "Can't get interrupt resource\n"); + return irq; + } + + tsc = kzalloc(sizeof(*tsc), GFP_KERNEL); + input = input_allocate_device(); + if (!tsc || !input) { + dev_err(&pdev->dev, "failed allocating memory\n"); + error = -ENOMEM; + goto err_free_mem; + } + + tsc->dev = input; + tsc->irq = irq; + + size = resource_size(res); + + if (!request_mem_region(res->start, size, pdev->name)) { + dev_err(&pdev->dev, "TSC registers are not free\n"); + error = -EBUSY; + goto err_free_mem; + } + + tsc->tsc_base = ioremap(res->start, size); + if (!tsc->tsc_base) { + dev_err(&pdev->dev, "Can't map memory\n"); + error = -ENOMEM; + goto err_release_mem; + } + + tsc->clk = clk_get(&pdev->dev, NULL); + if (IS_ERR(tsc->clk)) { + dev_err(&pdev->dev, "failed getting clock\n"); + error = PTR_ERR(tsc->clk); + goto err_unmap; + } + + input->name = MOD_NAME; + input->phys = "lpc32xx/input0"; + input->id.bustype = BUS_HOST; + input->id.vendor = 0x0001; + input->id.product = 0x0002; + input->id.version = 0x0100; + input->dev.parent = &pdev->dev; + input->open = lpc32xx_ts_open; + input->close = lpc32xx_ts_close; + + input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); + input->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); + input_set_abs_params(input, ABS_X, LPC32XX_TSC_MIN_XY_VAL, + LPC32XX_TSC_MAX_XY_VAL, 0, 0); + input_set_abs_params(input, ABS_Y, LPC32XX_TSC_MIN_XY_VAL, + LPC32XX_TSC_MAX_XY_VAL, 0, 0); + + input_set_drvdata(input, tsc); + + error = request_irq(tsc->irq, lpc32xx_ts_interrupt, + IRQF_DISABLED, pdev->name, tsc); + if (error) { + dev_err(&pdev->dev, "failed requesting interrupt\n"); + goto err_put_clock; + } + + error = input_register_device(input); + if (error) { + dev_err(&pdev->dev, "failed registering input device\n"); + goto err_free_irq; + } + + platform_set_drvdata(pdev, tsc); + device_init_wakeup(&pdev->dev, 1); + + return 0; + +err_free_irq: + free_irq(tsc->irq, tsc); +err_put_clock: + clk_put(tsc->clk); +err_unmap: + iounmap(tsc->tsc_base); +err_release_mem: + release_mem_region(res->start, size); +err_free_mem: + input_free_device(input); + kfree(tsc); + + return error; +} + +static int __devexit lpc32xx_ts_remove(struct platform_device *pdev) +{ + struct lpc32xx_tsc *tsc = platform_get_drvdata(pdev); + struct resource *res; + + device_init_wakeup(&pdev->dev, 0); + free_irq(tsc->irq, tsc); + + input_unregister_device(tsc->dev); + + clk_put(tsc->clk); + + iounmap(tsc->tsc_base); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + release_mem_region(res->start, resource_size(res)); + + kfree(tsc); + + return 0; +} + +#ifdef CONFIG_PM +static int lpc32xx_ts_suspend(struct device *dev) +{ + struct lpc32xx_tsc *tsc = dev_get_drvdata(dev); + struct input_dev *input = tsc->dev; + + /* + * Suspend and resume can be called when the device hasn't been + * enabled. If there are no users that have the device open, then + * avoid calling the TSC stop and start functions as the TSC + * isn't yet clocked. + */ + mutex_lock(&input->mutex); + + if (input->users) { + if (device_may_wakeup(dev)) + enable_irq_wake(tsc->irq); + else + lpc32xx_stop_tsc(tsc); + } + + mutex_unlock(&input->mutex); + + return 0; +} + +static int lpc32xx_ts_resume(struct device *dev) +{ + struct lpc32xx_tsc *tsc = dev_get_drvdata(dev); + struct input_dev *input = tsc->dev; + + mutex_lock(&input->mutex); + + if (input->users) { + if (device_may_wakeup(dev)) + disable_irq_wake(tsc->irq); + else + lpc32xx_setup_tsc(tsc); + } + + mutex_unlock(&input->mutex); + + return 0; +} + +static const struct dev_pm_ops lpc32xx_ts_pm_ops = { + .suspend = lpc32xx_ts_suspend, + .resume = lpc32xx_ts_resume, +}; +#define LPC32XX_TS_PM_OPS (&lpc32xx_ts_pm_ops) +#else +#define LPC32XX_TS_PM_OPS NULL +#endif + +static struct platform_driver lpc32xx_ts_driver = { + .probe = lpc32xx_ts_probe, + .remove = __devexit_p(lpc32xx_ts_remove), + .driver = { + .name = MOD_NAME, + .owner = THIS_MODULE, + .pm = LPC32XX_TS_PM_OPS, + }, +}; + +static int __init lpc32xx_ts_init(void) +{ + return platform_driver_register(&lpc32xx_ts_driver); +} +module_init(lpc32xx_ts_init); + +static void __exit lpc32xx_ts_exit(void) +{ + platform_driver_unregister(&lpc32xx_ts_driver); +} +module_exit(lpc32xx_ts_exit); + +MODULE_AUTHOR("Kevin Wells <kevin.wells@nxp.com"); +MODULE_DESCRIPTION("LPC32XX TSC Driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:lpc32xx_ts"); diff --git a/drivers/input/touchscreen/mcs5000_ts.c b/drivers/input/touchscreen/mcs5000_ts.c index 1fb0c2f06a44..6ee9940aaf5b 100644 --- a/drivers/input/touchscreen/mcs5000_ts.c +++ b/drivers/input/touchscreen/mcs5000_ts.c @@ -16,7 +16,7 @@ #include <linux/module.h> #include <linux/init.h> #include <linux/i2c.h> -#include <linux/i2c/mcs5000_ts.h> +#include <linux/i2c/mcs.h> #include <linux/interrupt.h> #include <linux/input.h> #include <linux/irq.h> @@ -105,7 +105,7 @@ enum mcs5000_ts_read_offset { struct mcs5000_ts_data { struct i2c_client *client; struct input_dev *input_dev; - const struct mcs5000_ts_platform_data *platform_data; + const struct mcs_platform_data *platform_data; }; static irqreturn_t mcs5000_ts_interrupt(int irq, void *dev_id) @@ -164,7 +164,7 @@ static irqreturn_t mcs5000_ts_interrupt(int irq, void *dev_id) static void mcs5000_ts_phys_init(struct mcs5000_ts_data *data) { - const struct mcs5000_ts_platform_data *platform_data = + const struct mcs_platform_data *platform_data = data->platform_data; struct i2c_client *client = data->client; diff --git a/drivers/input/touchscreen/mk712.c b/drivers/input/touchscreen/mk712.c index efd3aebaba5f..36e57deacd03 100644 --- a/drivers/input/touchscreen/mk712.c +++ b/drivers/input/touchscreen/mk712.c @@ -17,7 +17,7 @@ * found in Gateway AOL Connected Touchpad computers. * * Documentation for ICS MK712 can be found at: - * http://www.icst.com/pdf/mk712.pdf + * http://www.idt.com/products/getDoc.cfm?docID=18713923 */ /* diff --git a/drivers/input/touchscreen/qt602240_ts.c b/drivers/input/touchscreen/qt602240_ts.c new file mode 100644 index 000000000000..66b26ad3032a --- /dev/null +++ b/drivers/input/touchscreen/qt602240_ts.c @@ -0,0 +1,1401 @@ +/* + * AT42QT602240/ATMXT224 Touchscreen driver + * + * Copyright (C) 2010 Samsung Electronics Co.Ltd + * Author: Joonyoung Shim <jy0922.shim@samsung.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/firmware.h> +#include <linux/i2c.h> +#include <linux/i2c/qt602240_ts.h> +#include <linux/input.h> +#include <linux/interrupt.h> +#include <linux/slab.h> + +/* Version */ +#define QT602240_VER_20 20 +#define QT602240_VER_21 21 +#define QT602240_VER_22 22 + +/* Slave addresses */ +#define QT602240_APP_LOW 0x4a +#define QT602240_APP_HIGH 0x4b +#define QT602240_BOOT_LOW 0x24 +#define QT602240_BOOT_HIGH 0x25 + +/* Firmware */ +#define QT602240_FW_NAME "qt602240.fw" + +/* Registers */ +#define QT602240_FAMILY_ID 0x00 +#define QT602240_VARIANT_ID 0x01 +#define QT602240_VERSION 0x02 +#define QT602240_BUILD 0x03 +#define QT602240_MATRIX_X_SIZE 0x04 +#define QT602240_MATRIX_Y_SIZE 0x05 +#define QT602240_OBJECT_NUM 0x06 +#define QT602240_OBJECT_START 0x07 + +#define QT602240_OBJECT_SIZE 6 + +/* Object types */ +#define QT602240_DEBUG_DIAGNOSTIC 37 +#define QT602240_GEN_MESSAGE 5 +#define QT602240_GEN_COMMAND 6 +#define QT602240_GEN_POWER 7 +#define QT602240_GEN_ACQUIRE 8 +#define QT602240_TOUCH_MULTI 9 +#define QT602240_TOUCH_KEYARRAY 15 +#define QT602240_TOUCH_PROXIMITY 23 +#define QT602240_PROCI_GRIPFACE 20 +#define QT602240_PROCG_NOISE 22 +#define QT602240_PROCI_ONETOUCH 24 +#define QT602240_PROCI_TWOTOUCH 27 +#define QT602240_SPT_COMMSCONFIG 18 /* firmware ver 21 over */ +#define QT602240_SPT_GPIOPWM 19 +#define QT602240_SPT_SELFTEST 25 +#define QT602240_SPT_CTECONFIG 28 +#define QT602240_SPT_USERDATA 38 /* firmware ver 21 over */ + +/* QT602240_GEN_COMMAND field */ +#define QT602240_COMMAND_RESET 0 +#define QT602240_COMMAND_BACKUPNV 1 +#define QT602240_COMMAND_CALIBRATE 2 +#define QT602240_COMMAND_REPORTALL 3 +#define QT602240_COMMAND_DIAGNOSTIC 5 + +/* QT602240_GEN_POWER field */ +#define QT602240_POWER_IDLEACQINT 0 +#define QT602240_POWER_ACTVACQINT 1 +#define QT602240_POWER_ACTV2IDLETO 2 + +/* QT602240_GEN_ACQUIRE field */ +#define QT602240_ACQUIRE_CHRGTIME 0 +#define QT602240_ACQUIRE_TCHDRIFT 2 +#define QT602240_ACQUIRE_DRIFTST 3 +#define QT602240_ACQUIRE_TCHAUTOCAL 4 +#define QT602240_ACQUIRE_SYNC 5 +#define QT602240_ACQUIRE_ATCHCALST 6 +#define QT602240_ACQUIRE_ATCHCALSTHR 7 + +/* QT602240_TOUCH_MULTI field */ +#define QT602240_TOUCH_CTRL 0 +#define QT602240_TOUCH_XORIGIN 1 +#define QT602240_TOUCH_YORIGIN 2 +#define QT602240_TOUCH_XSIZE 3 +#define QT602240_TOUCH_YSIZE 4 +#define QT602240_TOUCH_BLEN 6 +#define QT602240_TOUCH_TCHTHR 7 +#define QT602240_TOUCH_TCHDI 8 +#define QT602240_TOUCH_ORIENT 9 +#define QT602240_TOUCH_MOVHYSTI 11 +#define QT602240_TOUCH_MOVHYSTN 12 +#define QT602240_TOUCH_NUMTOUCH 14 +#define QT602240_TOUCH_MRGHYST 15 +#define QT602240_TOUCH_MRGTHR 16 +#define QT602240_TOUCH_AMPHYST 17 +#define QT602240_TOUCH_XRANGE_LSB 18 +#define QT602240_TOUCH_XRANGE_MSB 19 +#define QT602240_TOUCH_YRANGE_LSB 20 +#define QT602240_TOUCH_YRANGE_MSB 21 +#define QT602240_TOUCH_XLOCLIP 22 +#define QT602240_TOUCH_XHICLIP 23 +#define QT602240_TOUCH_YLOCLIP 24 +#define QT602240_TOUCH_YHICLIP 25 +#define QT602240_TOUCH_XEDGECTRL 26 +#define QT602240_TOUCH_XEDGEDIST 27 +#define QT602240_TOUCH_YEDGECTRL 28 +#define QT602240_TOUCH_YEDGEDIST 29 +#define QT602240_TOUCH_JUMPLIMIT 30 /* firmware ver 22 over */ + +/* QT602240_PROCI_GRIPFACE field */ +#define QT602240_GRIPFACE_CTRL 0 +#define QT602240_GRIPFACE_XLOGRIP 1 +#define QT602240_GRIPFACE_XHIGRIP 2 +#define QT602240_GRIPFACE_YLOGRIP 3 +#define QT602240_GRIPFACE_YHIGRIP 4 +#define QT602240_GRIPFACE_MAXTCHS 5 +#define QT602240_GRIPFACE_SZTHR1 7 +#define QT602240_GRIPFACE_SZTHR2 8 +#define QT602240_GRIPFACE_SHPTHR1 9 +#define QT602240_GRIPFACE_SHPTHR2 10 +#define QT602240_GRIPFACE_SUPEXTTO 11 + +/* QT602240_PROCI_NOISE field */ +#define QT602240_NOISE_CTRL 0 +#define QT602240_NOISE_OUTFLEN 1 +#define QT602240_NOISE_GCAFUL_LSB 3 +#define QT602240_NOISE_GCAFUL_MSB 4 +#define QT602240_NOISE_GCAFLL_LSB 5 +#define QT602240_NOISE_GCAFLL_MSB 6 +#define QT602240_NOISE_ACTVGCAFVALID 7 +#define QT602240_NOISE_NOISETHR 8 +#define QT602240_NOISE_FREQHOPSCALE 10 +#define QT602240_NOISE_FREQ0 11 +#define QT602240_NOISE_FREQ1 12 +#define QT602240_NOISE_FREQ2 13 +#define QT602240_NOISE_FREQ3 14 +#define QT602240_NOISE_FREQ4 15 +#define QT602240_NOISE_IDLEGCAFVALID 16 + +/* QT602240_SPT_COMMSCONFIG */ +#define QT602240_COMMS_CTRL 0 +#define QT602240_COMMS_CMD 1 + +/* QT602240_SPT_CTECONFIG field */ +#define QT602240_CTE_CTRL 0 +#define QT602240_CTE_CMD 1 +#define QT602240_CTE_MODE 2 +#define QT602240_CTE_IDLEGCAFDEPTH 3 +#define QT602240_CTE_ACTVGCAFDEPTH 4 +#define QT602240_CTE_VOLTAGE 5 /* firmware ver 21 over */ + +#define QT602240_VOLTAGE_DEFAULT 2700000 +#define QT602240_VOLTAGE_STEP 10000 + +/* Define for QT602240_GEN_COMMAND */ +#define QT602240_BOOT_VALUE 0xa5 +#define QT602240_BACKUP_VALUE 0x55 +#define QT602240_BACKUP_TIME 25 /* msec */ +#define QT602240_RESET_TIME 65 /* msec */ + +#define QT602240_FWRESET_TIME 175 /* msec */ + +/* Command to unlock bootloader */ +#define QT602240_UNLOCK_CMD_MSB 0xaa +#define QT602240_UNLOCK_CMD_LSB 0xdc + +/* Bootloader mode status */ +#define QT602240_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */ +#define QT602240_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */ +#define QT602240_FRAME_CRC_CHECK 0x02 +#define QT602240_FRAME_CRC_FAIL 0x03 +#define QT602240_FRAME_CRC_PASS 0x04 +#define QT602240_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */ +#define QT602240_BOOT_STATUS_MASK 0x3f + +/* Touch status */ +#define QT602240_SUPPRESS (1 << 1) +#define QT602240_AMP (1 << 2) +#define QT602240_VECTOR (1 << 3) +#define QT602240_MOVE (1 << 4) +#define QT602240_RELEASE (1 << 5) +#define QT602240_PRESS (1 << 6) +#define QT602240_DETECT (1 << 7) + +/* Touchscreen absolute values */ +#define QT602240_MAX_XC 0x3ff +#define QT602240_MAX_YC 0x3ff +#define QT602240_MAX_AREA 0xff + +#define QT602240_MAX_FINGER 10 + +/* Initial register values recommended from chip vendor */ +static const u8 init_vals_ver_20[] = { + /* QT602240_GEN_COMMAND(6) */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* QT602240_GEN_POWER(7) */ + 0x20, 0xff, 0x32, + /* QT602240_GEN_ACQUIRE(8) */ + 0x08, 0x05, 0x05, 0x00, 0x00, 0x00, 0x05, 0x14, + /* QT602240_TOUCH_MULTI(9) */ + 0x00, 0x00, 0x00, 0x11, 0x0a, 0x00, 0x00, 0x00, 0x02, 0x00, + 0x00, 0x01, 0x01, 0x0e, 0x0a, 0x0a, 0x0a, 0x0a, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x88, 0x64, + /* QT602240_TOUCH_KEYARRAY(15) */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, + /* QT602240_SPT_GPIOPWM(19) */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, + /* QT602240_PROCI_GRIPFACE(20) */ + 0x00, 0x64, 0x64, 0x64, 0x64, 0x00, 0x00, 0x1e, 0x14, 0x04, + 0x1e, 0x00, + /* QT602240_PROCG_NOISE(22) */ + 0x05, 0x00, 0x00, 0x19, 0x00, 0xe7, 0xff, 0x04, 0x32, 0x00, + 0x01, 0x0a, 0x0f, 0x14, 0x00, 0x00, 0xe8, + /* QT602240_TOUCH_PROXIMITY(23) */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, + /* QT602240_PROCI_ONETOUCH(24) */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* QT602240_SPT_SELFTEST(25) */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, + /* QT602240_PROCI_TWOTOUCH(27) */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* QT602240_SPT_CTECONFIG(28) */ + 0x00, 0x00, 0x00, 0x04, 0x08, +}; + +static const u8 init_vals_ver_21[] = { + /* QT602240_GEN_COMMAND(6) */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* QT602240_GEN_POWER(7) */ + 0x20, 0xff, 0x32, + /* QT602240_GEN_ACQUIRE(8) */ + 0x0a, 0x00, 0x05, 0x00, 0x00, 0x00, 0x09, 0x23, + /* QT602240_TOUCH_MULTI(9) */ + 0x00, 0x00, 0x00, 0x13, 0x0b, 0x00, 0x00, 0x00, 0x02, 0x00, + 0x00, 0x01, 0x01, 0x0e, 0x0a, 0x0a, 0x0a, 0x0a, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* QT602240_TOUCH_KEYARRAY(15) */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, + /* QT602240_SPT_GPIOPWM(19) */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* QT602240_PROCI_GRIPFACE(20) */ + 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x50, 0x28, 0x04, + 0x0f, 0x0a, + /* QT602240_PROCG_NOISE(22) */ + 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x23, 0x00, + 0x00, 0x05, 0x0f, 0x19, 0x23, 0x2d, 0x03, + /* QT602240_TOUCH_PROXIMITY(23) */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, + /* QT602240_PROCI_ONETOUCH(24) */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* QT602240_SPT_SELFTEST(25) */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, + /* QT602240_PROCI_TWOTOUCH(27) */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* QT602240_SPT_CTECONFIG(28) */ + 0x00, 0x00, 0x00, 0x08, 0x10, 0x00, +}; + +static const u8 init_vals_ver_22[] = { + /* QT602240_GEN_COMMAND(6) */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* QT602240_GEN_POWER(7) */ + 0x20, 0xff, 0x32, + /* QT602240_GEN_ACQUIRE(8) */ + 0x0a, 0x00, 0x05, 0x00, 0x00, 0x00, 0x09, 0x23, + /* QT602240_TOUCH_MULTI(9) */ + 0x00, 0x00, 0x00, 0x13, 0x0b, 0x00, 0x00, 0x00, 0x02, 0x00, + 0x00, 0x01, 0x01, 0x0e, 0x0a, 0x0a, 0x0a, 0x0a, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, + /* QT602240_TOUCH_KEYARRAY(15) */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, + /* QT602240_SPT_GPIOPWM(19) */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* QT602240_PROCI_GRIPFACE(20) */ + 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x50, 0x28, 0x04, + 0x0f, 0x0a, + /* QT602240_PROCG_NOISE(22) */ + 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x23, 0x00, + 0x00, 0x05, 0x0f, 0x19, 0x23, 0x2d, 0x03, + /* QT602240_TOUCH_PROXIMITY(23) */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, + /* QT602240_PROCI_ONETOUCH(24) */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* QT602240_SPT_SELFTEST(25) */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, + /* QT602240_PROCI_TWOTOUCH(27) */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* QT602240_SPT_CTECONFIG(28) */ + 0x00, 0x00, 0x00, 0x08, 0x10, 0x00, +}; + +struct qt602240_info { + u8 family_id; + u8 variant_id; + u8 version; + u8 build; + u8 matrix_xsize; + u8 matrix_ysize; + u8 object_num; +}; + +struct qt602240_object { + u8 type; + u16 start_address; + u8 size; + u8 instances; + u8 num_report_ids; + + /* to map object and message */ + u8 max_reportid; +}; + +struct qt602240_message { + u8 reportid; + u8 message[7]; + u8 checksum; +}; + +struct qt602240_finger { + int status; + int x; + int y; + int area; +}; + +/* Each client has this additional data */ +struct qt602240_data { + struct i2c_client *client; + struct input_dev *input_dev; + const struct qt602240_platform_data *pdata; + struct qt602240_object *object_table; + struct qt602240_info info; + struct qt602240_finger finger[QT602240_MAX_FINGER]; + unsigned int irq; +}; + +static bool qt602240_object_readable(unsigned int type) +{ + switch (type) { + case QT602240_GEN_MESSAGE: + case QT602240_GEN_COMMAND: + case QT602240_GEN_POWER: + case QT602240_GEN_ACQUIRE: + case QT602240_TOUCH_MULTI: + case QT602240_TOUCH_KEYARRAY: + case QT602240_TOUCH_PROXIMITY: + case QT602240_PROCI_GRIPFACE: + case QT602240_PROCG_NOISE: + case QT602240_PROCI_ONETOUCH: + case QT602240_PROCI_TWOTOUCH: + case QT602240_SPT_COMMSCONFIG: + case QT602240_SPT_GPIOPWM: + case QT602240_SPT_SELFTEST: + case QT602240_SPT_CTECONFIG: + case QT602240_SPT_USERDATA: + return true; + default: + return false; + } +} + +static bool qt602240_object_writable(unsigned int type) +{ + switch (type) { + case QT602240_GEN_COMMAND: + case QT602240_GEN_POWER: + case QT602240_GEN_ACQUIRE: + case QT602240_TOUCH_MULTI: + case QT602240_TOUCH_KEYARRAY: + case QT602240_TOUCH_PROXIMITY: + case QT602240_PROCI_GRIPFACE: + case QT602240_PROCG_NOISE: + case QT602240_PROCI_ONETOUCH: + case QT602240_PROCI_TWOTOUCH: + case QT602240_SPT_GPIOPWM: + case QT602240_SPT_SELFTEST: + case QT602240_SPT_CTECONFIG: + return true; + default: + return false; + } +} + +static void qt602240_dump_message(struct device *dev, + struct qt602240_message *message) +{ + dev_dbg(dev, "reportid:\t0x%x\n", message->reportid); + dev_dbg(dev, "message1:\t0x%x\n", message->message[0]); + dev_dbg(dev, "message2:\t0x%x\n", message->message[1]); + dev_dbg(dev, "message3:\t0x%x\n", message->message[2]); + dev_dbg(dev, "message4:\t0x%x\n", message->message[3]); + dev_dbg(dev, "message5:\t0x%x\n", message->message[4]); + dev_dbg(dev, "message6:\t0x%x\n", message->message[5]); + dev_dbg(dev, "message7:\t0x%x\n", message->message[6]); + dev_dbg(dev, "checksum:\t0x%x\n", message->checksum); +} + +static int qt602240_check_bootloader(struct i2c_client *client, + unsigned int state) +{ + u8 val; + +recheck: + if (i2c_master_recv(client, &val, 1) != 1) { + dev_err(&client->dev, "%s: i2c recv failed\n", __func__); + return -EIO; + } + + switch (state) { + case QT602240_WAITING_BOOTLOAD_CMD: + case QT602240_WAITING_FRAME_DATA: + val &= ~QT602240_BOOT_STATUS_MASK; + break; + case QT602240_FRAME_CRC_PASS: + if (val == QT602240_FRAME_CRC_CHECK) + goto recheck; + break; + default: + return -EINVAL; + } + + if (val != state) { + dev_err(&client->dev, "Unvalid bootloader mode state\n"); + return -EINVAL; + } + + return 0; +} + +static int qt602240_unlock_bootloader(struct i2c_client *client) +{ + u8 buf[2]; + + buf[0] = QT602240_UNLOCK_CMD_LSB; + buf[1] = QT602240_UNLOCK_CMD_MSB; + + if (i2c_master_send(client, buf, 2) != 2) { + dev_err(&client->dev, "%s: i2c send failed\n", __func__); + return -EIO; + } + + return 0; +} + +static int qt602240_fw_write(struct i2c_client *client, + const u8 *data, unsigned int frame_size) +{ + if (i2c_master_send(client, data, frame_size) != frame_size) { + dev_err(&client->dev, "%s: i2c send failed\n", __func__); + return -EIO; + } + + return 0; +} + +static int __qt602240_read_reg(struct i2c_client *client, + u16 reg, u16 len, void *val) +{ + struct i2c_msg xfer[2]; + u8 buf[2]; + + buf[0] = reg & 0xff; + buf[1] = (reg >> 8) & 0xff; + + /* Write register */ + xfer[0].addr = client->addr; + xfer[0].flags = 0; + xfer[0].len = 2; + xfer[0].buf = buf; + + /* Read data */ + xfer[1].addr = client->addr; + xfer[1].flags = I2C_M_RD; + xfer[1].len = len; + xfer[1].buf = val; + + if (i2c_transfer(client->adapter, xfer, 2) != 2) { + dev_err(&client->dev, "%s: i2c transfer failed\n", __func__); + return -EIO; + } + + return 0; +} + +static int qt602240_read_reg(struct i2c_client *client, u16 reg, u8 *val) +{ + return __qt602240_read_reg(client, reg, 1, val); +} + +static int qt602240_write_reg(struct i2c_client *client, u16 reg, u8 val) +{ + u8 buf[3]; + + buf[0] = reg & 0xff; + buf[1] = (reg >> 8) & 0xff; + buf[2] = val; + + if (i2c_master_send(client, buf, 3) != 3) { + dev_err(&client->dev, "%s: i2c send failed\n", __func__); + return -EIO; + } + + return 0; +} + +static int qt602240_read_object_table(struct i2c_client *client, + u16 reg, u8 *object_buf) +{ + return __qt602240_read_reg(client, reg, QT602240_OBJECT_SIZE, + object_buf); +} + +static struct qt602240_object * +qt602240_get_object(struct qt602240_data *data, u8 type) +{ + struct qt602240_object *object; + int i; + + for (i = 0; i < data->info.object_num; i++) { + object = data->object_table + i; + if (object->type == type) + return object; + } + + dev_err(&data->client->dev, "Invalid object type\n"); + return NULL; +} + +static int qt602240_read_message(struct qt602240_data *data, + struct qt602240_message *message) +{ + struct qt602240_object *object; + u16 reg; + + object = qt602240_get_object(data, QT602240_GEN_MESSAGE); + if (!object) + return -EINVAL; + + reg = object->start_address; + return __qt602240_read_reg(data->client, reg, + sizeof(struct qt602240_message), message); +} + +static int qt602240_read_object(struct qt602240_data *data, + u8 type, u8 offset, u8 *val) +{ + struct qt602240_object *object; + u16 reg; + + object = qt602240_get_object(data, type); + if (!object) + return -EINVAL; + + reg = object->start_address; + return __qt602240_read_reg(data->client, reg + offset, 1, val); +} + +static int qt602240_write_object(struct qt602240_data *data, + u8 type, u8 offset, u8 val) +{ + struct qt602240_object *object; + u16 reg; + + object = qt602240_get_object(data, type); + if (!object) + return -EINVAL; + + reg = object->start_address; + return qt602240_write_reg(data->client, reg + offset, val); +} + +static void qt602240_input_report(struct qt602240_data *data, int single_id) +{ + struct qt602240_finger *finger = data->finger; + struct input_dev *input_dev = data->input_dev; + int status = finger[single_id].status; + int finger_num = 0; + int id; + + for (id = 0; id < QT602240_MAX_FINGER; id++) { + if (!finger[id].status) + continue; + + input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, + finger[id].status != QT602240_RELEASE ? + finger[id].area : 0); + input_report_abs(input_dev, ABS_MT_POSITION_X, + finger[id].x); + input_report_abs(input_dev, ABS_MT_POSITION_Y, + finger[id].y); + input_mt_sync(input_dev); + + if (finger[id].status == QT602240_RELEASE) + finger[id].status = 0; + else + finger_num++; + } + + input_report_key(input_dev, BTN_TOUCH, finger_num > 0); + + if (status != QT602240_RELEASE) { + input_report_abs(input_dev, ABS_X, finger[single_id].x); + input_report_abs(input_dev, ABS_Y, finger[single_id].y); + } + + input_sync(input_dev); +} + +static void qt602240_input_touchevent(struct qt602240_data *data, + struct qt602240_message *message, int id) +{ + struct qt602240_finger *finger = data->finger; + struct device *dev = &data->client->dev; + u8 status = message->message[0]; + int x; + int y; + int area; + + /* Check the touch is present on the screen */ + if (!(status & QT602240_DETECT)) { + if (status & QT602240_RELEASE) { + dev_dbg(dev, "[%d] released\n", id); + + finger[id].status = QT602240_RELEASE; + qt602240_input_report(data, id); + } + return; + } + + /* Check only AMP detection */ + if (!(status & (QT602240_PRESS | QT602240_MOVE))) + return; + + x = (message->message[1] << 2) | ((message->message[3] & ~0x3f) >> 6); + y = (message->message[2] << 2) | ((message->message[3] & ~0xf3) >> 2); + area = message->message[4]; + + dev_dbg(dev, "[%d] %s x: %d, y: %d, area: %d\n", id, + status & QT602240_MOVE ? "moved" : "pressed", + x, y, area); + + finger[id].status = status & QT602240_MOVE ? + QT602240_MOVE : QT602240_PRESS; + finger[id].x = x; + finger[id].y = y; + finger[id].area = area; + + qt602240_input_report(data, id); +} + +static irqreturn_t qt602240_interrupt(int irq, void *dev_id) +{ + struct qt602240_data *data = dev_id; + struct qt602240_message message; + struct qt602240_object *object; + struct device *dev = &data->client->dev; + int id; + u8 reportid; + u8 max_reportid; + u8 min_reportid; + + do { + if (qt602240_read_message(data, &message)) { + dev_err(dev, "Failed to read message\n"); + goto end; + } + + reportid = message.reportid; + + /* whether reportid is thing of QT602240_TOUCH_MULTI */ + object = qt602240_get_object(data, QT602240_TOUCH_MULTI); + if (!object) + goto end; + + max_reportid = object->max_reportid; + min_reportid = max_reportid - object->num_report_ids + 1; + id = reportid - min_reportid; + + if (reportid >= min_reportid && reportid <= max_reportid) + qt602240_input_touchevent(data, &message, id); + else + qt602240_dump_message(dev, &message); + } while (reportid != 0xff); + +end: + return IRQ_HANDLED; +} + +static int qt602240_check_reg_init(struct qt602240_data *data) +{ + struct qt602240_object *object; + struct device *dev = &data->client->dev; + int index = 0; + int i, j; + u8 version = data->info.version; + u8 *init_vals; + + switch (version) { + case QT602240_VER_20: + init_vals = (u8 *)init_vals_ver_20; + break; + case QT602240_VER_21: + init_vals = (u8 *)init_vals_ver_21; + break; + case QT602240_VER_22: + init_vals = (u8 *)init_vals_ver_22; + break; + default: + dev_err(dev, "Firmware version %d doesn't support\n", version); + return -EINVAL; + } + + for (i = 0; i < data->info.object_num; i++) { + object = data->object_table + i; + + if (!qt602240_object_writable(object->type)) + continue; + + for (j = 0; j < object->size + 1; j++) + qt602240_write_object(data, object->type, j, + init_vals[index + j]); + + index += object->size + 1; + } + + return 0; +} + +static int qt602240_check_matrix_size(struct qt602240_data *data) +{ + const struct qt602240_platform_data *pdata = data->pdata; + struct device *dev = &data->client->dev; + int mode = -1; + int error; + u8 val; + + dev_dbg(dev, "Number of X lines: %d\n", pdata->x_line); + dev_dbg(dev, "Number of Y lines: %d\n", pdata->y_line); + + switch (pdata->x_line) { + case 0 ... 15: + if (pdata->y_line <= 14) + mode = 0; + break; + case 16: + if (pdata->y_line <= 12) + mode = 1; + if (pdata->y_line == 13 || pdata->y_line == 14) + mode = 0; + break; + case 17: + if (pdata->y_line <= 11) + mode = 2; + if (pdata->y_line == 12 || pdata->y_line == 13) + mode = 1; + break; + case 18: + if (pdata->y_line <= 10) + mode = 3; + if (pdata->y_line == 11 || pdata->y_line == 12) + mode = 2; + break; + case 19: + if (pdata->y_line <= 9) + mode = 4; + if (pdata->y_line == 10 || pdata->y_line == 11) + mode = 3; + break; + case 20: + mode = 4; + } + + if (mode < 0) { + dev_err(dev, "Invalid X/Y lines\n"); + return -EINVAL; + } + + error = qt602240_read_object(data, QT602240_SPT_CTECONFIG, + QT602240_CTE_MODE, &val); + if (error) + return error; + + if (mode == val) + return 0; + + /* Change the CTE configuration */ + qt602240_write_object(data, QT602240_SPT_CTECONFIG, + QT602240_CTE_CTRL, 1); + qt602240_write_object(data, QT602240_SPT_CTECONFIG, + QT602240_CTE_MODE, mode); + qt602240_write_object(data, QT602240_SPT_CTECONFIG, + QT602240_CTE_CTRL, 0); + + return 0; +} + +static int qt602240_make_highchg(struct qt602240_data *data) +{ + struct device *dev = &data->client->dev; + int count = 10; + int error; + u8 val; + + /* Read dummy message to make high CHG pin */ + do { + error = qt602240_read_object(data, QT602240_GEN_MESSAGE, 0, &val); + if (error) + return error; + } while ((val != 0xff) && --count); + + if (!count) { + dev_err(dev, "CHG pin isn't cleared\n"); + return -EBUSY; + } + + return 0; +} + +static void qt602240_handle_pdata(struct qt602240_data *data) +{ + const struct qt602240_platform_data *pdata = data->pdata; + u8 voltage; + + /* Set touchscreen lines */ + qt602240_write_object(data, QT602240_TOUCH_MULTI, QT602240_TOUCH_XSIZE, + pdata->x_line); + qt602240_write_object(data, QT602240_TOUCH_MULTI, QT602240_TOUCH_YSIZE, + pdata->y_line); + + /* Set touchscreen orient */ + qt602240_write_object(data, QT602240_TOUCH_MULTI, QT602240_TOUCH_ORIENT, + pdata->orient); + + /* Set touchscreen burst length */ + qt602240_write_object(data, QT602240_TOUCH_MULTI, + QT602240_TOUCH_BLEN, pdata->blen); + + /* Set touchscreen threshold */ + qt602240_write_object(data, QT602240_TOUCH_MULTI, + QT602240_TOUCH_TCHTHR, pdata->threshold); + + /* Set touchscreen resolution */ + qt602240_write_object(data, QT602240_TOUCH_MULTI, + QT602240_TOUCH_XRANGE_LSB, (pdata->x_size - 1) & 0xff); + qt602240_write_object(data, QT602240_TOUCH_MULTI, + QT602240_TOUCH_XRANGE_MSB, (pdata->x_size - 1) >> 8); + qt602240_write_object(data, QT602240_TOUCH_MULTI, + QT602240_TOUCH_YRANGE_LSB, (pdata->y_size - 1) & 0xff); + qt602240_write_object(data, QT602240_TOUCH_MULTI, + QT602240_TOUCH_YRANGE_MSB, (pdata->y_size - 1) >> 8); + + /* Set touchscreen voltage */ + if (data->info.version >= QT602240_VER_21 && pdata->voltage) { + if (pdata->voltage < QT602240_VOLTAGE_DEFAULT) { + voltage = (QT602240_VOLTAGE_DEFAULT - pdata->voltage) / + QT602240_VOLTAGE_STEP; + voltage = 0xff - voltage + 1; + } else + voltage = (pdata->voltage - QT602240_VOLTAGE_DEFAULT) / + QT602240_VOLTAGE_STEP; + + qt602240_write_object(data, QT602240_SPT_CTECONFIG, + QT602240_CTE_VOLTAGE, voltage); + } +} + +static int qt602240_get_info(struct qt602240_data *data) +{ + struct i2c_client *client = data->client; + struct qt602240_info *info = &data->info; + int error; + u8 val; + + error = qt602240_read_reg(client, QT602240_FAMILY_ID, &val); + if (error) + return error; + info->family_id = val; + + error = qt602240_read_reg(client, QT602240_VARIANT_ID, &val); + if (error) + return error; + info->variant_id = val; + + error = qt602240_read_reg(client, QT602240_VERSION, &val); + if (error) + return error; + info->version = val; + + error = qt602240_read_reg(client, QT602240_BUILD, &val); + if (error) + return error; + info->build = val; + + error = qt602240_read_reg(client, QT602240_OBJECT_NUM, &val); + if (error) + return error; + info->object_num = val; + + return 0; +} + +static int qt602240_get_object_table(struct qt602240_data *data) +{ + int error; + int i; + u16 reg; + u8 reportid = 0; + u8 buf[QT602240_OBJECT_SIZE]; + + for (i = 0; i < data->info.object_num; i++) { + struct qt602240_object *object = data->object_table + i; + + reg = QT602240_OBJECT_START + QT602240_OBJECT_SIZE * i; + error = qt602240_read_object_table(data->client, reg, buf); + if (error) + return error; + + object->type = buf[0]; + object->start_address = (buf[2] << 8) | buf[1]; + object->size = buf[3]; + object->instances = buf[4]; + object->num_report_ids = buf[5]; + + if (object->num_report_ids) { + reportid += object->num_report_ids * + (object->instances + 1); + object->max_reportid = reportid; + } + } + + return 0; +} + +static int qt602240_initialize(struct qt602240_data *data) +{ + struct i2c_client *client = data->client; + struct qt602240_info *info = &data->info; + int error; + u8 val; + + error = qt602240_get_info(data); + if (error) + return error; + + data->object_table = kcalloc(info->object_num, + sizeof(struct qt602240_data), + GFP_KERNEL); + if (!data->object_table) { + dev_err(&client->dev, "Failed to allocate memory\n"); + return -ENOMEM; + } + + /* Get object table information */ + error = qt602240_get_object_table(data); + if (error) + return error; + + /* Check register init values */ + error = qt602240_check_reg_init(data); + if (error) + return error; + + /* Check X/Y matrix size */ + error = qt602240_check_matrix_size(data); + if (error) + return error; + + error = qt602240_make_highchg(data); + if (error) + return error; + + qt602240_handle_pdata(data); + + /* Backup to memory */ + qt602240_write_object(data, QT602240_GEN_COMMAND, + QT602240_COMMAND_BACKUPNV, + QT602240_BACKUP_VALUE); + msleep(QT602240_BACKUP_TIME); + + /* Soft reset */ + qt602240_write_object(data, QT602240_GEN_COMMAND, + QT602240_COMMAND_RESET, 1); + msleep(QT602240_RESET_TIME); + + /* Update matrix size at info struct */ + error = qt602240_read_reg(client, QT602240_MATRIX_X_SIZE, &val); + if (error) + return error; + info->matrix_xsize = val; + + error = qt602240_read_reg(client, QT602240_MATRIX_Y_SIZE, &val); + if (error) + return error; + info->matrix_ysize = val; + + dev_info(&client->dev, + "Family ID: %d Variant ID: %d Version: %d Build: %d\n", + info->family_id, info->variant_id, info->version, + info->build); + + dev_info(&client->dev, + "Matrix X Size: %d Matrix Y Size: %d Object Num: %d\n", + info->matrix_xsize, info->matrix_ysize, + info->object_num); + + return 0; +} + +static ssize_t qt602240_object_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct qt602240_data *data = dev_get_drvdata(dev); + struct qt602240_object *object; + int count = 0; + int i, j; + int error; + u8 val; + + for (i = 0; i < data->info.object_num; i++) { + object = data->object_table + i; + + count += sprintf(buf + count, + "Object Table Element %d(Type %d)\n", + i + 1, object->type); + + if (!qt602240_object_readable(object->type)) { + count += sprintf(buf + count, "\n"); + continue; + } + + for (j = 0; j < object->size + 1; j++) { + error = qt602240_read_object(data, + object->type, j, &val); + if (error) + return error; + + count += sprintf(buf + count, + " Byte %d: 0x%x (%d)\n", j, val, val); + } + + count += sprintf(buf + count, "\n"); + } + + return count; +} + +static int qt602240_load_fw(struct device *dev, const char *fn) +{ + struct qt602240_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; + const struct firmware *fw = NULL; + unsigned int frame_size; + unsigned int pos = 0; + int ret; + + ret = request_firmware(&fw, fn, dev); + if (ret) { + dev_err(dev, "Unable to open firmware %s\n", fn); + return ret; + } + + /* Change to the bootloader mode */ + qt602240_write_object(data, QT602240_GEN_COMMAND, + QT602240_COMMAND_RESET, QT602240_BOOT_VALUE); + msleep(QT602240_RESET_TIME); + + /* Change to slave address of bootloader */ + if (client->addr == QT602240_APP_LOW) + client->addr = QT602240_BOOT_LOW; + else + client->addr = QT602240_BOOT_HIGH; + + ret = qt602240_check_bootloader(client, QT602240_WAITING_BOOTLOAD_CMD); + if (ret) + goto out; + + /* Unlock bootloader */ + qt602240_unlock_bootloader(client); + + while (pos < fw->size) { + ret = qt602240_check_bootloader(client, + QT602240_WAITING_FRAME_DATA); + if (ret) + goto out; + + frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1)); + + /* We should add 2 at frame size as the the firmware data is not + * included the CRC bytes. + */ + frame_size += 2; + + /* Write one frame to device */ + qt602240_fw_write(client, fw->data + pos, frame_size); + + ret = qt602240_check_bootloader(client, + QT602240_FRAME_CRC_PASS); + if (ret) + goto out; + + pos += frame_size; + + dev_dbg(dev, "Updated %d bytes / %zd bytes\n", pos, fw->size); + } + +out: + release_firmware(fw); + + /* Change to slave address of application */ + if (client->addr == QT602240_BOOT_LOW) + client->addr = QT602240_APP_LOW; + else + client->addr = QT602240_APP_HIGH; + + return ret; +} + +static ssize_t qt602240_update_fw_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct qt602240_data *data = dev_get_drvdata(dev); + unsigned int version; + int error; + + if (sscanf(buf, "%u", &version) != 1) { + dev_err(dev, "Invalid values\n"); + return -EINVAL; + } + + if (data->info.version < QT602240_VER_21 || version < QT602240_VER_21) { + dev_err(dev, "FW update supported starting with version 21\n"); + return -EINVAL; + } + + disable_irq(data->irq); + + error = qt602240_load_fw(dev, QT602240_FW_NAME); + if (error) { + dev_err(dev, "The firmware update failed(%d)\n", error); + count = error; + } else { + dev_dbg(dev, "The firmware update succeeded\n"); + + /* Wait for reset */ + msleep(QT602240_FWRESET_TIME); + + kfree(data->object_table); + data->object_table = NULL; + + qt602240_initialize(data); + } + + enable_irq(data->irq); + + return count; +} + +static DEVICE_ATTR(object, 0444, qt602240_object_show, NULL); +static DEVICE_ATTR(update_fw, 0664, NULL, qt602240_update_fw_store); + +static struct attribute *qt602240_attrs[] = { + &dev_attr_object.attr, + &dev_attr_update_fw.attr, + NULL +}; + +static const struct attribute_group qt602240_attr_group = { + .attrs = qt602240_attrs, +}; + +static void qt602240_start(struct qt602240_data *data) +{ + /* Touch enable */ + qt602240_write_object(data, + QT602240_TOUCH_MULTI, QT602240_TOUCH_CTRL, 0x83); +} + +static void qt602240_stop(struct qt602240_data *data) +{ + /* Touch disable */ + qt602240_write_object(data, + QT602240_TOUCH_MULTI, QT602240_TOUCH_CTRL, 0); +} + +static int qt602240_input_open(struct input_dev *dev) +{ + struct qt602240_data *data = input_get_drvdata(dev); + + qt602240_start(data); + + return 0; +} + +static void qt602240_input_close(struct input_dev *dev) +{ + struct qt602240_data *data = input_get_drvdata(dev); + + qt602240_stop(data); +} + +static int __devinit qt602240_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct qt602240_data *data; + struct input_dev *input_dev; + int error; + + if (!client->dev.platform_data) + return -EINVAL; + + data = kzalloc(sizeof(struct qt602240_data), GFP_KERNEL); + input_dev = input_allocate_device(); + if (!data || !input_dev) { + dev_err(&client->dev, "Failed to allocate memory\n"); + error = -ENOMEM; + goto err_free_mem; + } + + input_dev->name = "AT42QT602240/ATMXT224 Touchscreen"; + input_dev->id.bustype = BUS_I2C; + input_dev->dev.parent = &client->dev; + input_dev->open = qt602240_input_open; + input_dev->close = qt602240_input_close; + + __set_bit(EV_ABS, input_dev->evbit); + __set_bit(EV_KEY, input_dev->evbit); + __set_bit(BTN_TOUCH, input_dev->keybit); + + /* For single touch */ + input_set_abs_params(input_dev, ABS_X, + 0, QT602240_MAX_XC, 0, 0); + input_set_abs_params(input_dev, ABS_Y, + 0, QT602240_MAX_YC, 0, 0); + + /* For multi touch */ + input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, + 0, QT602240_MAX_AREA, 0, 0); + input_set_abs_params(input_dev, ABS_MT_POSITION_X, + 0, QT602240_MAX_XC, 0, 0); + input_set_abs_params(input_dev, ABS_MT_POSITION_Y, + 0, QT602240_MAX_YC, 0, 0); + + input_set_drvdata(input_dev, data); + + data->client = client; + data->input_dev = input_dev; + data->pdata = client->dev.platform_data; + data->irq = client->irq; + + i2c_set_clientdata(client, data); + + error = qt602240_initialize(data); + if (error) + goto err_free_object; + + error = request_threaded_irq(client->irq, NULL, qt602240_interrupt, + IRQF_TRIGGER_FALLING, client->dev.driver->name, data); + if (error) { + dev_err(&client->dev, "Failed to register interrupt\n"); + goto err_free_object; + } + + error = input_register_device(input_dev); + if (error) + goto err_free_irq; + + error = sysfs_create_group(&client->dev.kobj, &qt602240_attr_group); + if (error) + goto err_unregister_device; + + return 0; + +err_unregister_device: + input_unregister_device(input_dev); + input_dev = NULL; +err_free_irq: + free_irq(client->irq, data); +err_free_object: + kfree(data->object_table); +err_free_mem: + input_free_device(input_dev); + kfree(data); + return error; +} + +static int __devexit qt602240_remove(struct i2c_client *client) +{ + struct qt602240_data *data = i2c_get_clientdata(client); + + sysfs_remove_group(&client->dev.kobj, &qt602240_attr_group); + free_irq(data->irq, data); + input_unregister_device(data->input_dev); + kfree(data->object_table); + kfree(data); + + return 0; +} + +#ifdef CONFIG_PM +static int qt602240_suspend(struct i2c_client *client, pm_message_t mesg) +{ + struct qt602240_data *data = i2c_get_clientdata(client); + struct input_dev *input_dev = data->input_dev; + + mutex_lock(&input_dev->mutex); + + if (input_dev->users) + qt602240_stop(data); + + mutex_unlock(&input_dev->mutex); + + return 0; +} + +static int qt602240_resume(struct i2c_client *client) +{ + struct qt602240_data *data = i2c_get_clientdata(client); + struct input_dev *input_dev = data->input_dev; + + /* Soft reset */ + qt602240_write_object(data, QT602240_GEN_COMMAND, + QT602240_COMMAND_RESET, 1); + + msleep(QT602240_RESET_TIME); + + mutex_lock(&input_dev->mutex); + + if (input_dev->users) + qt602240_start(data); + + mutex_unlock(&input_dev->mutex); + + return 0; +} +#else +#define qt602240_suspend NULL +#define qt602240_resume NULL +#endif + +static const struct i2c_device_id qt602240_id[] = { + { "qt602240_ts", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, qt602240_id); + +static struct i2c_driver qt602240_driver = { + .driver = { + .name = "qt602240_ts", + .owner = THIS_MODULE, + }, + .probe = qt602240_probe, + .remove = __devexit_p(qt602240_remove), + .suspend = qt602240_suspend, + .resume = qt602240_resume, + .id_table = qt602240_id, +}; + +static int __init qt602240_init(void) +{ + return i2c_add_driver(&qt602240_driver); +} + +static void __exit qt602240_exit(void) +{ + i2c_del_driver(&qt602240_driver); +} + +module_init(qt602240_init); +module_exit(qt602240_exit); + +/* Module information */ +MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); +MODULE_DESCRIPTION("AT42QT602240/ATMXT224 Touchscreen driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/input/touchscreen/s3c2410_ts.c b/drivers/input/touchscreen/s3c2410_ts.c index 6085d12fd561..8feb7f3c8be1 100644 --- a/drivers/input/touchscreen/s3c2410_ts.c +++ b/drivers/input/touchscreen/s3c2410_ts.c @@ -350,7 +350,7 @@ static int __devinit s3c2410ts_probe(struct platform_device *pdev) err_tcirq: free_irq(ts.irq_tc, ts.input); err_inputdev: - input_unregister_device(ts.input); + input_free_device(ts.input); err_iomap: iounmap(ts.io); err_clk: diff --git a/drivers/input/touchscreen/stmpe-ts.c b/drivers/input/touchscreen/stmpe-ts.c new file mode 100644 index 000000000000..ae88e13c99ff --- /dev/null +++ b/drivers/input/touchscreen/stmpe-ts.c @@ -0,0 +1,400 @@ +/* STMicroelectronics STMPE811 Touchscreen Driver + * + * (C) 2010 Luotao Fu <l.fu@pengutronix.de> + * All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/sched.h> +#include <linux/interrupt.h> +#include <linux/init.h> +#include <linux/device.h> +#include <linux/platform_device.h> +#include <linux/input.h> +#include <linux/slab.h> +#include <linux/delay.h> +#include <linux/i2c.h> +#include <linux/workqueue.h> + +#include <linux/mfd/stmpe.h> + +/* Register layouts and functionalities are identical on all stmpexxx variants + * with touchscreen controller + */ +#define STMPE_REG_INT_STA 0x0B +#define STMPE_REG_ADC_CTRL1 0x20 +#define STMPE_REG_ADC_CTRL2 0x21 +#define STMPE_REG_TSC_CTRL 0x40 +#define STMPE_REG_TSC_CFG 0x41 +#define STMPE_REG_FIFO_TH 0x4A +#define STMPE_REG_FIFO_STA 0x4B +#define STMPE_REG_FIFO_SIZE 0x4C +#define STMPE_REG_TSC_DATA_XYZ 0x52 +#define STMPE_REG_TSC_FRACTION_Z 0x56 +#define STMPE_REG_TSC_I_DRIVE 0x58 + +#define OP_MOD_XYZ 0 + +#define STMPE_TSC_CTRL_TSC_EN (1<<0) + +#define STMPE_FIFO_STA_RESET (1<<0) + +#define STMPE_IRQ_TOUCH_DET 0 + +#define SAMPLE_TIME(x) ((x & 0xf) << 4) +#define MOD_12B(x) ((x & 0x1) << 3) +#define REF_SEL(x) ((x & 0x1) << 1) +#define ADC_FREQ(x) (x & 0x3) +#define AVE_CTRL(x) ((x & 0x3) << 6) +#define DET_DELAY(x) ((x & 0x7) << 3) +#define SETTLING(x) (x & 0x7) +#define FRACTION_Z(x) (x & 0x7) +#define I_DRIVE(x) (x & 0x1) +#define OP_MODE(x) ((x & 0x7) << 1) + +#define STMPE_TS_NAME "stmpe-ts" +#define XY_MASK 0xfff + +struct stmpe_touch { + struct stmpe *stmpe; + struct input_dev *idev; + struct delayed_work work; + struct device *dev; + u8 sample_time; + u8 mod_12b; + u8 ref_sel; + u8 adc_freq; + u8 ave_ctrl; + u8 touch_det_delay; + u8 settling; + u8 fraction_z; + u8 i_drive; +}; + +static int __stmpe_reset_fifo(struct stmpe *stmpe) +{ + int ret; + + ret = stmpe_set_bits(stmpe, STMPE_REG_FIFO_STA, + STMPE_FIFO_STA_RESET, STMPE_FIFO_STA_RESET); + if (ret) + return ret; + + return stmpe_set_bits(stmpe, STMPE_REG_FIFO_STA, + STMPE_FIFO_STA_RESET, 0); +} + +static void stmpe_work(struct work_struct *work) +{ + int int_sta; + u32 timeout = 40; + + struct stmpe_touch *ts = + container_of(work, struct stmpe_touch, work.work); + + int_sta = stmpe_reg_read(ts->stmpe, STMPE_REG_INT_STA); + + /* + * touch_det sometimes get desasserted or just get stuck. This appears + * to be a silicon bug, We still have to clearify this with the + * manufacture. As a workaround We release the key anyway if the + * touch_det keeps coming in after 4ms, while the FIFO contains no value + * during the whole time. + */ + while ((int_sta & (1 << STMPE_IRQ_TOUCH_DET)) && (timeout > 0)) { + timeout--; + int_sta = stmpe_reg_read(ts->stmpe, STMPE_REG_INT_STA); + udelay(100); + } + + /* reset the FIFO before we report release event */ + __stmpe_reset_fifo(ts->stmpe); + + input_report_abs(ts->idev, ABS_PRESSURE, 0); + input_sync(ts->idev); +} + +static irqreturn_t stmpe_ts_handler(int irq, void *data) +{ + u8 data_set[4]; + int x, y, z; + struct stmpe_touch *ts = data; + + /* + * Cancel scheduled polling for release if we have new value + * available. Wait if the polling is already running. + */ + cancel_delayed_work_sync(&ts->work); + + /* + * The FIFO sometimes just crashes and stops generating interrupts. This + * appears to be a silicon bug. We still have to clearify this with + * the manufacture. As a workaround we disable the TSC while we are + * collecting data and flush the FIFO after reading + */ + stmpe_set_bits(ts->stmpe, STMPE_REG_TSC_CTRL, + STMPE_TSC_CTRL_TSC_EN, 0); + + stmpe_block_read(ts->stmpe, STMPE_REG_TSC_DATA_XYZ, 4, data_set); + + x = (data_set[0] << 4) | (data_set[1] >> 4); + y = ((data_set[1] & 0xf) << 8) | data_set[2]; + z = data_set[3]; + + input_report_abs(ts->idev, ABS_X, x); + input_report_abs(ts->idev, ABS_Y, y); + input_report_abs(ts->idev, ABS_PRESSURE, z); + input_sync(ts->idev); + + /* flush the FIFO after we have read out our values. */ + __stmpe_reset_fifo(ts->stmpe); + + /* reenable the tsc */ + stmpe_set_bits(ts->stmpe, STMPE_REG_TSC_CTRL, + STMPE_TSC_CTRL_TSC_EN, STMPE_TSC_CTRL_TSC_EN); + + /* start polling for touch_det to detect release */ + schedule_delayed_work(&ts->work, HZ / 50); + + return IRQ_HANDLED; +} + +static int __devinit stmpe_init_hw(struct stmpe_touch *ts) +{ + int ret; + u8 adc_ctrl1, adc_ctrl1_mask, tsc_cfg, tsc_cfg_mask; + struct stmpe *stmpe = ts->stmpe; + struct device *dev = ts->dev; + + ret = stmpe_enable(stmpe, STMPE_BLOCK_TOUCHSCREEN | STMPE_BLOCK_ADC); + if (ret) { + dev_err(dev, "Could not enable clock for ADC and TS\n"); + return ret; + } + + adc_ctrl1 = SAMPLE_TIME(ts->sample_time) | MOD_12B(ts->mod_12b) | + REF_SEL(ts->ref_sel); + adc_ctrl1_mask = SAMPLE_TIME(0xff) | MOD_12B(0xff) | REF_SEL(0xff); + + ret = stmpe_set_bits(stmpe, STMPE_REG_ADC_CTRL1, + adc_ctrl1_mask, adc_ctrl1); + if (ret) { + dev_err(dev, "Could not setup ADC\n"); + return ret; + } + + ret = stmpe_set_bits(stmpe, STMPE_REG_ADC_CTRL2, + ADC_FREQ(0xff), ADC_FREQ(ts->adc_freq)); + if (ret) { + dev_err(dev, "Could not setup ADC\n"); + return ret; + } + + tsc_cfg = AVE_CTRL(ts->ave_ctrl) | DET_DELAY(ts->touch_det_delay) | + SETTLING(ts->settling); + tsc_cfg_mask = AVE_CTRL(0xff) | DET_DELAY(0xff) | SETTLING(0xff); + + ret = stmpe_set_bits(stmpe, STMPE_REG_TSC_CFG, tsc_cfg_mask, tsc_cfg); + if (ret) { + dev_err(dev, "Could not config touch\n"); + return ret; + } + + ret = stmpe_set_bits(stmpe, STMPE_REG_TSC_FRACTION_Z, + FRACTION_Z(0xff), FRACTION_Z(ts->fraction_z)); + if (ret) { + dev_err(dev, "Could not config touch\n"); + return ret; + } + + ret = stmpe_set_bits(stmpe, STMPE_REG_TSC_I_DRIVE, + I_DRIVE(0xff), I_DRIVE(ts->i_drive)); + if (ret) { + dev_err(dev, "Could not config touch\n"); + return ret; + } + + /* set FIFO to 1 for single point reading */ + ret = stmpe_reg_write(stmpe, STMPE_REG_FIFO_TH, 1); + if (ret) { + dev_err(dev, "Could not set FIFO\n"); + return ret; + } + + ret = stmpe_set_bits(stmpe, STMPE_REG_TSC_CTRL, + OP_MODE(0xff), OP_MODE(OP_MOD_XYZ)); + if (ret) { + dev_err(dev, "Could not set mode\n"); + return ret; + } + + return 0; +} + +static int stmpe_ts_open(struct input_dev *dev) +{ + struct stmpe_touch *ts = input_get_drvdata(dev); + int ret = 0; + + ret = __stmpe_reset_fifo(ts->stmpe); + if (ret) + return ret; + + return stmpe_set_bits(ts->stmpe, STMPE_REG_TSC_CTRL, + STMPE_TSC_CTRL_TSC_EN, STMPE_TSC_CTRL_TSC_EN); +} + +static void stmpe_ts_close(struct input_dev *dev) +{ + struct stmpe_touch *ts = input_get_drvdata(dev); + + cancel_delayed_work_sync(&ts->work); + + stmpe_set_bits(ts->stmpe, STMPE_REG_TSC_CTRL, + STMPE_TSC_CTRL_TSC_EN, 0); +} + +static int __devinit stmpe_input_probe(struct platform_device *pdev) +{ + struct stmpe *stmpe = dev_get_drvdata(pdev->dev.parent); + struct stmpe_platform_data *pdata = stmpe->pdata; + struct stmpe_touch *ts; + struct input_dev *idev; + struct stmpe_ts_platform_data *ts_pdata = NULL; + int ret; + int ts_irq; + + ts_irq = platform_get_irq_byname(pdev, "FIFO_TH"); + if (ts_irq < 0) + return ts_irq; + + ts = kzalloc(sizeof(*ts), GFP_KERNEL); + if (!ts) { + ret = -ENOMEM; + goto err_out; + } + + idev = input_allocate_device(); + if (!idev) { + ret = -ENOMEM; + goto err_free_ts; + } + + platform_set_drvdata(pdev, ts); + ts->stmpe = stmpe; + ts->idev = idev; + ts->dev = &pdev->dev; + + if (pdata) + ts_pdata = pdata->ts; + + if (ts_pdata) { + ts->sample_time = ts_pdata->sample_time; + ts->mod_12b = ts_pdata->mod_12b; + ts->ref_sel = ts_pdata->ref_sel; + ts->adc_freq = ts_pdata->adc_freq; + ts->ave_ctrl = ts_pdata->ave_ctrl; + ts->touch_det_delay = ts_pdata->touch_det_delay; + ts->settling = ts_pdata->settling; + ts->fraction_z = ts_pdata->fraction_z; + ts->i_drive = ts_pdata->i_drive; + } + + INIT_DELAYED_WORK(&ts->work, stmpe_work); + + ret = request_threaded_irq(ts_irq, NULL, stmpe_ts_handler, + IRQF_ONESHOT, STMPE_TS_NAME, ts); + if (ret) { + dev_err(&pdev->dev, "Failed to request IRQ %d\n", ts_irq); + goto err_free_input; + } + + ret = stmpe_init_hw(ts); + if (ret) + goto err_free_irq; + + idev->name = STMPE_TS_NAME; + idev->id.bustype = BUS_I2C; + idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); + idev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); + + idev->open = stmpe_ts_open; + idev->close = stmpe_ts_close; + + input_set_drvdata(idev, ts); + + input_set_abs_params(idev, ABS_X, 0, XY_MASK, 0, 0); + input_set_abs_params(idev, ABS_Y, 0, XY_MASK, 0, 0); + input_set_abs_params(idev, ABS_PRESSURE, 0x0, 0xff, 0, 0); + + ret = input_register_device(idev); + if (ret) { + dev_err(&pdev->dev, "Could not register input device\n"); + goto err_free_irq; + } + + return ret; + +err_free_irq: + free_irq(ts_irq, ts); +err_free_input: + input_free_device(idev); + platform_set_drvdata(pdev, NULL); +err_free_ts: + kfree(ts); +err_out: + return ret; +} + +static int __devexit stmpe_ts_remove(struct platform_device *pdev) +{ + struct stmpe_touch *ts = platform_get_drvdata(pdev); + unsigned int ts_irq = platform_get_irq_byname(pdev, "FIFO_TH"); + + stmpe_disable(ts->stmpe, STMPE_BLOCK_TOUCHSCREEN); + + free_irq(ts_irq, ts); + + platform_set_drvdata(pdev, NULL); + + input_unregister_device(ts->idev); + + kfree(ts); + + return 0; +} + +static struct platform_driver stmpe_ts_driver = { + .driver = { + .name = STMPE_TS_NAME, + .owner = THIS_MODULE, + }, + .probe = stmpe_input_probe, + .remove = __devexit_p(stmpe_ts_remove), +}; + +static int __init stmpe_ts_init(void) +{ + return platform_driver_register(&stmpe_ts_driver); +} + +module_init(stmpe_ts_init); + +static void __exit stmpe_ts_exit(void) +{ + platform_driver_unregister(&stmpe_ts_driver); +} + +module_exit(stmpe_ts_exit); + +MODULE_AUTHOR("Luotao Fu <l.fu@pengutronix.de>"); +MODULE_DESCRIPTION("STMPEXXX touchscreen driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:" STMPE_TS_NAME); diff --git a/drivers/input/touchscreen/tnetv107x-ts.c b/drivers/input/touchscreen/tnetv107x-ts.c new file mode 100644 index 000000000000..cf1dba2e267c --- /dev/null +++ b/drivers/input/touchscreen/tnetv107x-ts.c @@ -0,0 +1,396 @@ +/* + * Texas Instruments TNETV107X Touchscreen Driver + * + * Copyright (C) 2010 Texas Instruments + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation version 2. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/input.h> +#include <linux/platform_device.h> +#include <linux/interrupt.h> +#include <linux/slab.h> +#include <linux/delay.h> +#include <linux/ctype.h> +#include <linux/io.h> +#include <linux/clk.h> + +#include <mach/tnetv107x.h> + +#define TSC_PENUP_POLL (HZ / 5) +#define IDLE_TIMEOUT 100 /* msec */ + +/* + * The first and last samples of a touch interval are usually garbage and need + * to be filtered out with these devices. The following definitions control + * the number of samples skipped. + */ +#define TSC_HEAD_SKIP 1 +#define TSC_TAIL_SKIP 1 +#define TSC_SKIP (TSC_HEAD_SKIP + TSC_TAIL_SKIP + 1) +#define TSC_SAMPLES (TSC_SKIP + 1) + +/* Register Offsets */ +struct tsc_regs { + u32 rev; + u32 tscm; + u32 bwcm; + u32 swc; + u32 adcchnl; + u32 adcdata; + u32 chval[4]; +}; + +/* TSC Mode Configuration Register (tscm) bits */ +#define WMODE BIT(0) +#define TSKIND BIT(1) +#define ZMEASURE_EN BIT(2) +#define IDLE BIT(3) +#define TSC_EN BIT(4) +#define STOP BIT(5) +#define ONE_SHOT BIT(6) +#define SINGLE BIT(7) +#define AVG BIT(8) +#define AVGNUM(x) (((x) & 0x03) << 9) +#define PVSTC(x) (((x) & 0x07) << 11) +#define PON BIT(14) +#define PONBG BIT(15) +#define AFERST BIT(16) + +/* ADC DATA Capture Register bits */ +#define DATA_VALID BIT(16) + +/* Register Access Macros */ +#define tsc_read(ts, reg) __raw_readl(&(ts)->regs->reg) +#define tsc_write(ts, reg, val) __raw_writel(val, &(ts)->regs->reg); +#define tsc_set_bits(ts, reg, val) \ + tsc_write(ts, reg, tsc_read(ts, reg) | (val)) +#define tsc_clr_bits(ts, reg, val) \ + tsc_write(ts, reg, tsc_read(ts, reg) & ~(val)) + +struct sample { + int x, y, p; +}; + +struct tsc_data { + struct input_dev *input_dev; + struct resource *res; + struct tsc_regs __iomem *regs; + struct timer_list timer; + spinlock_t lock; + struct clk *clk; + struct device *dev; + int sample_count; + struct sample samples[TSC_SAMPLES]; + int tsc_irq; +}; + +static int tsc_read_sample(struct tsc_data *ts, struct sample* sample) +{ + int x, y, z1, z2, t, p = 0; + u32 val; + + val = tsc_read(ts, chval[0]); + if (val & DATA_VALID) + x = val & 0xffff; + else + return -EINVAL; + + y = tsc_read(ts, chval[1]) & 0xffff; + z1 = tsc_read(ts, chval[2]) & 0xffff; + z2 = tsc_read(ts, chval[3]) & 0xffff; + + if (z1) { + t = ((600 * x) * (z2 - z1)); + p = t / (u32) (z1 << 12); + if (p < 0) + p = 0; + } + + sample->x = x; + sample->y = y; + sample->p = p; + + return 0; +} + +static void tsc_poll(unsigned long data) +{ + struct tsc_data *ts = (struct tsc_data *)data; + unsigned long flags; + int i, val, x, y, p; + + spin_lock_irqsave(&ts->lock, flags); + + if (ts->sample_count >= TSC_SKIP) { + input_report_abs(ts->input_dev, ABS_PRESSURE, 0); + input_report_key(ts->input_dev, BTN_TOUCH, 0); + input_sync(ts->input_dev); + } else if (ts->sample_count > 0) { + /* + * A touch event lasted less than our skip count. Salvage and + * report anyway. + */ + for (i = 0, val = 0; i < ts->sample_count; i++) + val += ts->samples[i].x; + x = val / ts->sample_count; + + for (i = 0, val = 0; i < ts->sample_count; i++) + val += ts->samples[i].y; + y = val / ts->sample_count; + + for (i = 0, val = 0; i < ts->sample_count; i++) + val += ts->samples[i].p; + p = val / ts->sample_count; + + input_report_abs(ts->input_dev, ABS_X, x); + input_report_abs(ts->input_dev, ABS_Y, y); + input_report_abs(ts->input_dev, ABS_PRESSURE, p); + input_report_key(ts->input_dev, BTN_TOUCH, 1); + input_sync(ts->input_dev); + } + + ts->sample_count = 0; + + spin_unlock_irqrestore(&ts->lock, flags); +} + +static irqreturn_t tsc_irq(int irq, void *dev_id) +{ + struct tsc_data *ts = (struct tsc_data *)dev_id; + struct sample *sample; + int index; + + spin_lock(&ts->lock); + + index = ts->sample_count % TSC_SAMPLES; + sample = &ts->samples[index]; + if (tsc_read_sample(ts, sample) < 0) + goto out; + + if (++ts->sample_count >= TSC_SKIP) { + index = (ts->sample_count - TSC_TAIL_SKIP - 1) % TSC_SAMPLES; + sample = &ts->samples[index]; + + input_report_abs(ts->input_dev, ABS_X, sample->x); + input_report_abs(ts->input_dev, ABS_Y, sample->y); + input_report_abs(ts->input_dev, ABS_PRESSURE, sample->p); + if (ts->sample_count == TSC_SKIP) + input_report_key(ts->input_dev, BTN_TOUCH, 1); + input_sync(ts->input_dev); + } + mod_timer(&ts->timer, jiffies + TSC_PENUP_POLL); +out: + spin_unlock(&ts->lock); + return IRQ_HANDLED; +} + +static int tsc_start(struct input_dev *dev) +{ + struct tsc_data *ts = input_get_drvdata(dev); + unsigned long timeout = jiffies + msecs_to_jiffies(IDLE_TIMEOUT); + u32 val; + + clk_enable(ts->clk); + + /* Go to idle mode, before any initialization */ + while (time_after(timeout, jiffies)) { + if (tsc_read(ts, tscm) & IDLE) + break; + } + + if (time_before(timeout, jiffies)) { + dev_warn(ts->dev, "timeout waiting for idle\n"); + clk_disable(ts->clk); + return -EIO; + } + + /* Configure TSC Control register*/ + val = (PONBG | PON | PVSTC(4) | ONE_SHOT | ZMEASURE_EN); + tsc_write(ts, tscm, val); + + /* Bring TSC out of reset: Clear AFE reset bit */ + val &= ~(AFERST); + tsc_write(ts, tscm, val); + + /* Configure all pins for hardware control*/ + tsc_write(ts, bwcm, 0); + + /* Finally enable the TSC */ + tsc_set_bits(ts, tscm, TSC_EN); + + return 0; +} + +static void tsc_stop(struct input_dev *dev) +{ + struct tsc_data *ts = input_get_drvdata(dev); + + tsc_clr_bits(ts, tscm, TSC_EN); + synchronize_irq(ts->tsc_irq); + del_timer_sync(&ts->timer); + clk_disable(ts->clk); +} + +static int __devinit tsc_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct tsc_data *ts; + int error = 0; + u32 rev = 0; + + ts = kzalloc(sizeof(struct tsc_data), GFP_KERNEL); + if (!ts) { + dev_err(dev, "cannot allocate device info\n"); + return -ENOMEM; + } + + ts->dev = dev; + spin_lock_init(&ts->lock); + setup_timer(&ts->timer, tsc_poll, (unsigned long)ts); + platform_set_drvdata(pdev, ts); + + ts->tsc_irq = platform_get_irq(pdev, 0); + if (ts->tsc_irq < 0) { + dev_err(dev, "cannot determine device interrupt\n"); + error = -ENODEV; + goto error_res; + } + + ts->res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!ts->res) { + dev_err(dev, "cannot determine register area\n"); + error = -ENODEV; + goto error_res; + } + + if (!request_mem_region(ts->res->start, resource_size(ts->res), + pdev->name)) { + dev_err(dev, "cannot claim register memory\n"); + ts->res = NULL; + error = -EINVAL; + goto error_res; + } + + ts->regs = ioremap(ts->res->start, resource_size(ts->res)); + if (!ts->regs) { + dev_err(dev, "cannot map register memory\n"); + error = -ENOMEM; + goto error_map; + } + + ts->clk = clk_get(dev, NULL); + if (!ts->clk) { + dev_err(dev, "cannot claim device clock\n"); + error = -EINVAL; + goto error_clk; + } + + error = request_threaded_irq(ts->tsc_irq, NULL, tsc_irq, 0, + dev_name(dev), ts); + if (error < 0) { + dev_err(ts->dev, "Could not allocate ts irq\n"); + goto error_irq; + } + + ts->input_dev = input_allocate_device(); + if (!ts->input_dev) { + dev_err(dev, "cannot allocate input device\n"); + error = -ENOMEM; + goto error_input; + } + input_set_drvdata(ts->input_dev, ts); + + ts->input_dev->name = pdev->name; + ts->input_dev->id.bustype = BUS_HOST; + ts->input_dev->dev.parent = &pdev->dev; + ts->input_dev->open = tsc_start; + ts->input_dev->close = tsc_stop; + + clk_enable(ts->clk); + rev = tsc_read(ts, rev); + ts->input_dev->id.product = ((rev >> 8) & 0x07); + ts->input_dev->id.version = ((rev >> 16) & 0xfff); + clk_disable(ts->clk); + + __set_bit(EV_KEY, ts->input_dev->evbit); + __set_bit(EV_ABS, ts->input_dev->evbit); + __set_bit(BTN_TOUCH, ts->input_dev->keybit); + + input_set_abs_params(ts->input_dev, ABS_X, 0, 0xffff, 5, 0); + input_set_abs_params(ts->input_dev, ABS_Y, 0, 0xffff, 5, 0); + input_set_abs_params(ts->input_dev, ABS_PRESSURE, 0, 4095, 128, 0); + + error = input_register_device(ts->input_dev); + if (error < 0) { + dev_err(dev, "failed input device registration\n"); + goto error_reg; + } + + return 0; + +error_reg: + input_free_device(ts->input_dev); +error_input: + free_irq(ts->tsc_irq, ts); +error_irq: + clk_put(ts->clk); +error_clk: + iounmap(ts->regs); +error_map: + release_mem_region(ts->res->start, resource_size(ts->res)); +error_res: + platform_set_drvdata(pdev, NULL); + kfree(ts); + + return error; +} + +static int __devexit tsc_remove(struct platform_device *pdev) +{ + struct tsc_data *ts = platform_get_drvdata(pdev); + + input_unregister_device(ts->input_dev); + free_irq(ts->tsc_irq, ts); + clk_put(ts->clk); + iounmap(ts->regs); + release_mem_region(ts->res->start, resource_size(ts->res)); + platform_set_drvdata(pdev, NULL); + kfree(ts); + + return 0; +} + +static struct platform_driver tsc_driver = { + .probe = tsc_probe, + .remove = __devexit_p(tsc_remove), + .driver.name = "tnetv107x-ts", + .driver.owner = THIS_MODULE, +}; + +static int __init tsc_init(void) +{ + return platform_driver_register(&tsc_driver); +} + +static void __exit tsc_exit(void) +{ + platform_driver_unregister(&tsc_driver); +} + +module_init(tsc_init); +module_exit(tsc_exit); + +MODULE_AUTHOR("Cyril Chemparathy"); +MODULE_DESCRIPTION("TNETV107X Touchscreen Driver"); +MODULE_ALIAS("platform: tnetv107x-ts"); +MODULE_LICENSE("GPL"); diff --git a/drivers/input/touchscreen/tps6507x-ts.c b/drivers/input/touchscreen/tps6507x-ts.c index 5b70a1419b4d..c8c136cf7bbc 100644 --- a/drivers/input/touchscreen/tps6507x-ts.c +++ b/drivers/input/touchscreen/tps6507x-ts.c @@ -335,6 +335,7 @@ static int tps6507x_ts_probe(struct platform_device *pdev) dev_err(tsc->dev, "schedule failed"); goto err2; } + platform_set_drvdata(pdev, tps6507x_dev); return 0; @@ -355,13 +356,10 @@ static int __devexit tps6507x_ts_remove(struct platform_device *pdev) struct tps6507x_ts *tsc = tps6507x_dev->ts; struct input_dev *input_dev = tsc->input_dev; - if (!tsc) - return 0; - cancel_delayed_work_sync(&tsc->work); destroy_workqueue(tsc->wq); - input_free_device(input_dev); + input_unregister_device(input_dev); tps6507x_dev->ts = NULL; kfree(tsc); diff --git a/drivers/input/touchscreen/tsc2007.c b/drivers/input/touchscreen/tsc2007.c index be23780e8a3e..80467f262331 100644 --- a/drivers/input/touchscreen/tsc2007.c +++ b/drivers/input/touchscreen/tsc2007.c @@ -265,7 +265,7 @@ static int __devinit tsc2007_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct tsc2007 *ts; - struct tsc2007_platform_data *pdata = pdata = client->dev.platform_data; + struct tsc2007_platform_data *pdata = client->dev.platform_data; struct input_dev *input_dev; int err; diff --git a/drivers/input/touchscreen/usbtouchscreen.c b/drivers/input/touchscreen/usbtouchscreen.c index 567d57215c28..f45f80f6d336 100644 --- a/drivers/input/touchscreen/usbtouchscreen.c +++ b/drivers/input/touchscreen/usbtouchscreen.c @@ -95,6 +95,7 @@ struct usbtouch_device_info { int (*get_pkt_len) (unsigned char *pkt, int len); int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt); + int (*alloc) (struct usbtouch_usb *usbtouch); int (*init) (struct usbtouch_usb *usbtouch); void (*exit) (struct usbtouch_usb *usbtouch); }; @@ -135,7 +136,7 @@ enum { DEVTYPE_JASTEC, DEVTYPE_E2I, DEVTYPE_ZYTRONIC, - DEVTYPE_TC5UH, + DEVTYPE_TC45USB, DEVTYPE_NEXIO, }; @@ -222,8 +223,11 @@ static const struct usb_device_id usbtouch_devices[] = { {USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC}, #endif -#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC5UH - {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC5UH}, +#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB + /* TC5UH */ + {USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB}, + /* TC4UM */ + {USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB}, #endif #ifdef CONFIG_TOUCHSCREEN_USB_NEXIO @@ -507,7 +511,7 @@ static int dmc_tsc10_init(struct usbtouch_usb *usbtouch) int ret = -ENOMEM; unsigned char *buf; - buf = kmalloc(2, GFP_KERNEL); + buf = kmalloc(2, GFP_NOIO); if (!buf) goto err_nobuf; /* reset */ @@ -574,10 +578,10 @@ static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) #endif /***************************************************************************** - * ET&T TC5UH part + * ET&T TC5UH/TC4UM part */ -#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC5UH -static int tc5uh_read_data(struct usbtouch_usb *dev, unsigned char *pkt) +#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB +static int tc45usb_read_data(struct usbtouch_usb *dev, unsigned char *pkt) { dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1]; dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3]; @@ -732,11 +736,43 @@ static void nexio_ack_complete(struct urb *urb) { } +static int nexio_alloc(struct usbtouch_usb *usbtouch) +{ + struct nexio_priv *priv; + int ret = -ENOMEM; + + usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL); + if (!usbtouch->priv) + goto out_buf; + + priv = usbtouch->priv; + + priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt), + GFP_KERNEL); + if (!priv->ack_buf) + goto err_priv; + + priv->ack = usb_alloc_urb(0, GFP_KERNEL); + if (!priv->ack) { + dbg("%s - usb_alloc_urb failed: usbtouch->ack", __func__); + goto err_ack_buf; + } + + return 0; + +err_ack_buf: + kfree(priv->ack_buf); +err_priv: + kfree(priv); +out_buf: + return ret; +} + static int nexio_init(struct usbtouch_usb *usbtouch) { struct usb_device *dev = interface_to_usbdev(usbtouch->interface); struct usb_host_interface *interface = usbtouch->interface->cur_altsetting; - struct nexio_priv *priv; + struct nexio_priv *priv = usbtouch->priv; int ret = -ENOMEM; int actual_len, i; unsigned char *buf; @@ -755,7 +791,7 @@ static int nexio_init(struct usbtouch_usb *usbtouch) if (!input_ep || !output_ep) return -ENXIO; - buf = kmalloc(NEXIO_BUFSIZE, GFP_KERNEL); + buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO); if (!buf) goto out_buf; @@ -787,11 +823,11 @@ static int nexio_init(struct usbtouch_usb *usbtouch) switch (buf[0]) { case 0x83: /* firmware version */ if (!firmware_ver) - firmware_ver = kstrdup(&buf[2], GFP_KERNEL); + firmware_ver = kstrdup(&buf[2], GFP_NOIO); break; case 0x84: /* device name */ if (!device_name) - device_name = kstrdup(&buf[2], GFP_KERNEL); + device_name = kstrdup(&buf[2], GFP_NOIO); break; } } @@ -802,36 +838,11 @@ static int nexio_init(struct usbtouch_usb *usbtouch) kfree(firmware_ver); kfree(device_name); - /* prepare ACK URB */ - ret = -ENOMEM; - - usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL); - if (!usbtouch->priv) - goto out_buf; - - priv = usbtouch->priv; - - priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt), - GFP_KERNEL); - if (!priv->ack_buf) - goto err_priv; - - priv->ack = usb_alloc_urb(0, GFP_KERNEL); - if (!priv->ack) { - dbg("%s - usb_alloc_urb failed: usbtouch->ack", __func__); - goto err_ack_buf; - } - usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep), priv->ack_buf, sizeof(nexio_ack_pkt), nexio_ack_complete, usbtouch); ret = 0; - goto out_buf; -err_ack_buf: - kfree(priv->ack_buf); -err_priv: - kfree(priv); out_buf: kfree(buf); return ret; @@ -849,29 +860,32 @@ static void nexio_exit(struct usbtouch_usb *usbtouch) static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt) { - int x, y, begin_x, begin_y, end_x, end_y, w, h, ret; struct nexio_touch_packet *packet = (void *) pkt; struct nexio_priv *priv = usbtouch->priv; + unsigned int data_len = be16_to_cpu(packet->data_len); + unsigned int x_len = be16_to_cpu(packet->x_len); + unsigned int y_len = be16_to_cpu(packet->y_len); + int x, y, begin_x, begin_y, end_x, end_y, w, h, ret; /* got touch data? */ if ((pkt[0] & 0xe0) != 0xe0) return 0; - if (be16_to_cpu(packet->data_len) > 0xff) - packet->data_len = cpu_to_be16(be16_to_cpu(packet->data_len) - 0x100); - if (be16_to_cpu(packet->x_len) > 0xff) - packet->x_len = cpu_to_be16(be16_to_cpu(packet->x_len) - 0x80); + if (data_len > 0xff) + data_len -= 0x100; + if (x_len > 0xff) + x_len -= 0x80; /* send ACK */ ret = usb_submit_urb(priv->ack, GFP_ATOMIC); if (!usbtouch->type->max_xc) { - usbtouch->type->max_xc = 2 * be16_to_cpu(packet->x_len); - input_set_abs_params(usbtouch->input, ABS_X, 0, - 2 * be16_to_cpu(packet->x_len), 0, 0); - usbtouch->type->max_yc = 2 * be16_to_cpu(packet->y_len); - input_set_abs_params(usbtouch->input, ABS_Y, 0, - 2 * be16_to_cpu(packet->y_len), 0, 0); + usbtouch->type->max_xc = 2 * x_len; + input_set_abs_params(usbtouch->input, ABS_X, + 0, usbtouch->type->max_xc, 0, 0); + usbtouch->type->max_yc = 2 * y_len; + input_set_abs_params(usbtouch->input, ABS_Y, + 0, usbtouch->type->max_yc, 0, 0); } /* * The device reports state of IR sensors on X and Y axes. @@ -881,22 +895,21 @@ static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt) * it's disabled (and untested) here as there's no X driver for that. */ begin_x = end_x = begin_y = end_y = -1; - for (x = 0; x < be16_to_cpu(packet->x_len); x++) { + for (x = 0; x < x_len; x++) { if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) { begin_x = x; continue; } if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) { end_x = x - 1; - for (y = be16_to_cpu(packet->x_len); - y < be16_to_cpu(packet->data_len); y++) { + for (y = x_len; y < data_len; y++) { if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) { - begin_y = y - be16_to_cpu(packet->x_len); + begin_y = y - x_len; continue; } if (end_y == -1 && begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) { - end_y = y - 1 - be16_to_cpu(packet->x_len); + end_y = y - 1 - x_len; w = end_x - begin_x; h = end_y - begin_y; #if 0 @@ -1104,14 +1117,14 @@ static struct usbtouch_device_info usbtouch_dev_info[] = { }, #endif -#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC5UH - [DEVTYPE_TC5UH] = { +#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB + [DEVTYPE_TC45USB] = { .min_xc = 0x0, .max_xc = 0x0fff, .min_yc = 0x0, .max_yc = 0x0fff, .rept_size = 5, - .read_data = tc5uh_read_data, + .read_data = tc45usb_read_data, }, #endif @@ -1120,6 +1133,7 @@ static struct usbtouch_device_info usbtouch_dev_info[] = { .rept_size = 1024, .irq_always = true, .read_data = nexio_read_data, + .alloc = nexio_alloc, .init = nexio_init, .exit = nexio_exit, }, @@ -1263,6 +1277,7 @@ static void usbtouch_irq(struct urb *urb) usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length); exit: + usb_mark_last_busy(interface_to_usbdev(usbtouch->interface)); retval = usb_submit_urb(urb, GFP_ATOMIC); if (retval) err("%s - usb_submit_urb failed with result: %d", @@ -1272,25 +1287,89 @@ exit: static int usbtouch_open(struct input_dev *input) { struct usbtouch_usb *usbtouch = input_get_drvdata(input); + int r; usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface); + r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0; + if (r < 0) + goto out; + if (!usbtouch->type->irq_always) { - if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) - return -EIO; + if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) { + r = -EIO; + goto out_put; + } } - return 0; + usbtouch->interface->needs_remote_wakeup = 1; +out_put: + usb_autopm_put_interface(usbtouch->interface); +out: + return r; } static void usbtouch_close(struct input_dev *input) { struct usbtouch_usb *usbtouch = input_get_drvdata(input); + int r; if (!usbtouch->type->irq_always) usb_kill_urb(usbtouch->irq); + r = usb_autopm_get_interface(usbtouch->interface); + usbtouch->interface->needs_remote_wakeup = 0; + if (!r) + usb_autopm_put_interface(usbtouch->interface); } +static int usbtouch_suspend +(struct usb_interface *intf, pm_message_t message) +{ + struct usbtouch_usb *usbtouch = usb_get_intfdata(intf); + + usb_kill_urb(usbtouch->irq); + + return 0; +} + +static int usbtouch_resume(struct usb_interface *intf) +{ + struct usbtouch_usb *usbtouch = usb_get_intfdata(intf); + struct input_dev *input = usbtouch->input; + int result = 0; + + mutex_lock(&input->mutex); + if (input->users || usbtouch->type->irq_always) + result = usb_submit_urb(usbtouch->irq, GFP_NOIO); + mutex_unlock(&input->mutex); + + return result; +} + +static int usbtouch_reset_resume(struct usb_interface *intf) +{ + struct usbtouch_usb *usbtouch = usb_get_intfdata(intf); + struct input_dev *input = usbtouch->input; + int err = 0; + + /* reinit the device */ + if (usbtouch->type->init) { + err = usbtouch->type->init(usbtouch); + if (err) { + dbg("%s - type->init() failed, err: %d", + __func__, err); + return err; + } + } + + /* restart IO if needed */ + mutex_lock(&input->mutex); + if (input->users) + err = usb_submit_urb(usbtouch->irq, GFP_NOIO); + mutex_unlock(&input->mutex); + + return err; +} static void usbtouch_free_buffers(struct usb_device *udev, struct usbtouch_usb *usbtouch) @@ -1411,12 +1490,21 @@ static int usbtouch_probe(struct usb_interface *intf, usbtouch->irq->transfer_dma = usbtouch->data_dma; usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; - /* device specific init */ + /* device specific allocations */ + if (type->alloc) { + err = type->alloc(usbtouch); + if (err) { + dbg("%s - type->alloc() failed, err: %d", __func__, err); + goto out_free_urb; + } + } + + /* device specific initialisation*/ if (type->init) { err = type->init(usbtouch); if (err) { dbg("%s - type->init() failed, err: %d", __func__, err); - goto out_free_urb; + goto out_do_exit; } } @@ -1429,8 +1517,11 @@ static int usbtouch_probe(struct usb_interface *intf, usb_set_intfdata(intf, usbtouch); if (usbtouch->type->irq_always) { + /* this can't fail */ + usb_autopm_get_interface(intf); err = usb_submit_urb(usbtouch->irq, GFP_KERNEL); if (err) { + usb_autopm_put_interface(intf); err("%s - usb_submit_urb failed with result: %d", __func__, err); goto out_unregister_input; @@ -1481,7 +1572,11 @@ static struct usb_driver usbtouch_driver = { .name = "usbtouchscreen", .probe = usbtouch_probe, .disconnect = usbtouch_disconnect, + .suspend = usbtouch_suspend, + .resume = usbtouch_resume, + .reset_resume = usbtouch_reset_resume, .id_table = usbtouch_devices, + .supports_autosuspend = 1, }; static int __init usbtouch_init(void) diff --git a/drivers/input/touchscreen/wacom_w8001.c b/drivers/input/touchscreen/wacom_w8001.c index 56dc35c94bb1..9ae4c7b16ba7 100644 --- a/drivers/input/touchscreen/wacom_w8001.c +++ b/drivers/input/touchscreen/wacom_w8001.c @@ -2,6 +2,7 @@ * Wacom W8001 penabled serial touchscreen driver * * Copyright (c) 2008 Jaya Kumar + * Copyright (c) 2010 Red Hat, Inc. * * This file is subject to the terms and conditions of the GNU General Public * License. See the file COPYING in the main directory of this archive for @@ -30,11 +31,24 @@ MODULE_LICENSE("GPL"); #define W8001_LEAD_BYTE 0x80 #define W8001_TAB_MASK 0x40 #define W8001_TAB_BYTE 0x40 +/* set in first byte of touch data packets */ +#define W8001_TOUCH_MASK (0x10 | W8001_LEAD_MASK) +#define W8001_TOUCH_BYTE (0x10 | W8001_LEAD_BYTE) #define W8001_QUERY_PACKET 0x20 #define W8001_CMD_START '1' #define W8001_CMD_QUERY '*' +#define W8001_CMD_TOUCHQUERY '%' + +/* length of data packets in bytes, depends on device. */ +#define W8001_PKTLEN_TOUCH93 5 +#define W8001_PKTLEN_TOUCH9A 7 +#define W8001_PKTLEN_TPCPEN 9 +#define W8001_PKTLEN_TPCCTL 11 /* control packet */ +#define W8001_PKTLEN_TOUCH2FG 13 + +#define MAX_TRACKING_ID 0xFF /* arbitrarily chosen */ struct w8001_coord { u8 rdy; @@ -48,6 +62,15 @@ struct w8001_coord { u8 tilt_y; }; +/* touch query reply packet */ +struct w8001_touch_query { + u8 panel_res; + u8 capacity_res; + u8 sensor_id; + u16 x; + u16 y; +}; + /* * Per-touchscreen data. */ @@ -62,6 +85,9 @@ struct w8001 { unsigned char response[W8001_MAX_LENGTH]; unsigned char data[W8001_MAX_LENGTH]; char phys[32]; + int type; + unsigned int pktlen; + int trkid[2]; }; static void parse_data(u8 *data, struct w8001_coord *coord) @@ -88,11 +114,98 @@ static void parse_data(u8 *data, struct w8001_coord *coord) coord->tilt_y = data[8] & 0x7F; } +static void parse_touch(struct w8001 *w8001) +{ + static int trkid; + struct input_dev *dev = w8001->dev; + unsigned char *data = w8001->data; + int i; + + for (i = 0; i < 2; i++) { + input_mt_slot(dev, i); + + if (data[0] & (1 << i)) { + int x = (data[6 * i + 1] << 7) | (data[6 * i + 2]); + int y = (data[6 * i + 3] << 7) | (data[6 * i + 4]); + /* data[5,6] and [11,12] is finger capacity */ + + input_report_abs(dev, ABS_MT_POSITION_X, x); + input_report_abs(dev, ABS_MT_POSITION_Y, y); + input_report_abs(dev, ABS_MT_TOOL_TYPE, MT_TOOL_FINGER); + if (w8001->trkid[i] < 0) + w8001->trkid[i] = trkid++ & MAX_TRACKING_ID; + } else { + w8001->trkid[i] = -1; + } + input_report_abs(dev, ABS_MT_TRACKING_ID, w8001->trkid[i]); + } + + input_sync(dev); +} + +static void parse_touchquery(u8 *data, struct w8001_touch_query *query) +{ + memset(query, 0, sizeof(*query)); + + query->panel_res = data[1]; + query->sensor_id = data[2] & 0x7; + query->capacity_res = data[7]; + + query->x = data[3] << 9; + query->x |= data[4] << 2; + query->x |= (data[2] >> 5) & 0x3; + + query->y = data[5] << 9; + query->y |= data[6] << 2; + query->y |= (data[2] >> 3) & 0x3; +} + +static void report_pen_events(struct w8001 *w8001, struct w8001_coord *coord) +{ + struct input_dev *dev = w8001->dev; + + /* + * We have 1 bit for proximity (rdy) and 3 bits for tip, side, + * side2/eraser. If rdy && f2 are set, this can be either pen + side2, + * or eraser. assume + * - if dev is already in proximity and f2 is toggled → pen + side2 + * - if dev comes into proximity with f2 set → eraser + * If f2 disappears after assuming eraser, fake proximity out for + * eraser and in for pen. + */ + + if (!w8001->type) { + w8001->type = coord->f2 ? BTN_TOOL_RUBBER : BTN_TOOL_PEN; + } else if (w8001->type == BTN_TOOL_RUBBER) { + if (!coord->f2) { + input_report_abs(dev, ABS_PRESSURE, 0); + input_report_key(dev, BTN_TOUCH, 0); + input_report_key(dev, BTN_STYLUS, 0); + input_report_key(dev, BTN_STYLUS2, 0); + input_report_key(dev, BTN_TOOL_RUBBER, 0); + input_sync(dev); + w8001->type = BTN_TOOL_PEN; + } + } else { + input_report_key(dev, BTN_STYLUS2, coord->f2); + } + + input_report_abs(dev, ABS_X, coord->x); + input_report_abs(dev, ABS_Y, coord->y); + input_report_abs(dev, ABS_PRESSURE, coord->pen_pressure); + input_report_key(dev, BTN_TOUCH, coord->tsw); + input_report_key(dev, BTN_STYLUS, coord->f1); + input_report_key(dev, w8001->type, coord->rdy); + input_sync(dev); + + if (!coord->rdy) + w8001->type = 0; +} + static irqreturn_t w8001_interrupt(struct serio *serio, unsigned char data, unsigned int flags) { struct w8001 *w8001 = serio_get_drvdata(serio); - struct input_dev *dev = w8001->dev; struct w8001_coord coord; unsigned char tmp; @@ -105,26 +218,45 @@ static irqreturn_t w8001_interrupt(struct serio *serio, } break; - case 8: + case W8001_PKTLEN_TOUCH93 - 1: + case W8001_PKTLEN_TOUCH9A - 1: + /* ignore one-finger touch packet. */ + if (w8001->pktlen == w8001->idx) + w8001->idx = 0; + break; + + /* Pen coordinates packet */ + case W8001_PKTLEN_TPCPEN - 1: tmp = w8001->data[0] & W8001_TAB_MASK; if (unlikely(tmp == W8001_TAB_BYTE)) break; + tmp = (w8001->data[0] & W8001_TOUCH_BYTE); + if (tmp == W8001_TOUCH_BYTE) + break; + w8001->idx = 0; parse_data(w8001->data, &coord); - input_report_abs(dev, ABS_X, coord.x); - input_report_abs(dev, ABS_Y, coord.y); - input_report_abs(dev, ABS_PRESSURE, coord.pen_pressure); - input_report_key(dev, BTN_TOUCH, coord.tsw); - input_sync(dev); + report_pen_events(w8001, &coord); break; - case 10: + /* control packet */ + case W8001_PKTLEN_TPCCTL - 1: + tmp = (w8001->data[0] & W8001_TOUCH_MASK); + if (tmp == W8001_TOUCH_BYTE) + break; + w8001->idx = 0; memcpy(w8001->response, w8001->data, W8001_MAX_LENGTH); w8001->response_type = W8001_QUERY_PACKET; complete(&w8001->cmd_done); break; + + /* 2 finger touch packet */ + case W8001_PKTLEN_TOUCH2FG - 1: + w8001->idx = 0; + parse_touch(w8001); + break; } return IRQ_HANDLED; @@ -167,6 +299,38 @@ static int w8001_setup(struct w8001 *w8001) input_set_abs_params(dev, ABS_TILT_X, 0, coord.tilt_x, 0, 0); input_set_abs_params(dev, ABS_TILT_Y, 0, coord.tilt_y, 0, 0); + error = w8001_command(w8001, W8001_CMD_TOUCHQUERY, true); + if (!error) { + struct w8001_touch_query touch; + + parse_touchquery(w8001->response, &touch); + + switch (touch.sensor_id) { + case 0: + case 2: + w8001->pktlen = W8001_PKTLEN_TOUCH93; + break; + case 1: + case 3: + case 4: + w8001->pktlen = W8001_PKTLEN_TOUCH9A; + break; + case 5: + w8001->pktlen = W8001_PKTLEN_TOUCH2FG; + + input_mt_create_slots(dev, 2); + input_set_abs_params(dev, ABS_MT_TRACKING_ID, + 0, MAX_TRACKING_ID, 0, 0); + input_set_abs_params(dev, ABS_MT_POSITION_X, + 0, touch.x, 0, 0); + input_set_abs_params(dev, ABS_MT_POSITION_Y, + 0, touch.y, 0, 0); + input_set_abs_params(dev, ABS_MT_TOOL_TYPE, + 0, 0, 0, 0); + break; + } + } + return w8001_command(w8001, W8001_CMD_START, false); } @@ -208,6 +372,7 @@ static int w8001_connect(struct serio *serio, struct serio_driver *drv) w8001->serio = serio; w8001->id = serio->id.id; w8001->dev = input_dev; + w8001->trkid[0] = w8001->trkid[1] = -1; init_completion(&w8001->cmd_done); snprintf(w8001->phys, sizeof(w8001->phys), "%s/input0", serio->phys); @@ -221,6 +386,10 @@ static int w8001_connect(struct serio *serio, struct serio_driver *drv) input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); + input_dev->keybit[BIT_WORD(BTN_TOOL_PEN)] |= BIT_MASK(BTN_TOOL_PEN); + input_dev->keybit[BIT_WORD(BTN_TOOL_RUBBER)] |= BIT_MASK(BTN_TOOL_RUBBER); + input_dev->keybit[BIT_WORD(BTN_STYLUS)] |= BIT_MASK(BTN_STYLUS); + input_dev->keybit[BIT_WORD(BTN_STYLUS2)] |= BIT_MASK(BTN_STYLUS2); serio_set_drvdata(serio, w8001); err = serio_open(serio, drv); diff --git a/drivers/input/touchscreen/wm97xx-core.c b/drivers/input/touchscreen/wm97xx-core.c index cbfef1ea7e30..6b75c9f660ae 100644 --- a/drivers/input/touchscreen/wm97xx-core.c +++ b/drivers/input/touchscreen/wm97xx-core.c @@ -125,6 +125,8 @@ int wm97xx_read_aux_adc(struct wm97xx *wm, u16 adcsel) { int power_adc = 0, auxval; u16 power = 0; + int rc = 0; + int timeout = 0; /* get codec */ mutex_lock(&wm->codec_mutex); @@ -143,7 +145,9 @@ int wm97xx_read_aux_adc(struct wm97xx *wm, u16 adcsel) /* Turn polling mode on to read AUX ADC */ wm->pen_probably_down = 1; - wm->codec->poll_sample(wm, adcsel, &auxval); + + while (rc != RC_VALID && timeout++ < 5) + rc = wm->codec->poll_sample(wm, adcsel, &auxval); if (power_adc) wm97xx_reg_write(wm, AC97_EXTENDED_MID, power | 0x8000); @@ -152,8 +156,15 @@ int wm97xx_read_aux_adc(struct wm97xx *wm, u16 adcsel) wm->pen_probably_down = 0; + if (timeout >= 5) { + dev_err(wm->dev, + "timeout reading auxadc %d, disabling digitiser\n", + adcsel); + wm->codec->dig_enable(wm, false); + } + mutex_unlock(&wm->codec_mutex); - return auxval & 0xfff; + return (rc == RC_VALID ? auxval & 0xfff : -EBUSY); } EXPORT_SYMBOL_GPL(wm97xx_read_aux_adc); @@ -684,8 +695,7 @@ static int wm97xx_probe(struct device *dev) touch_reg_err: platform_device_put(wm->touch_dev); touch_err: - platform_device_unregister(wm->battery_dev); - wm->battery_dev = NULL; + platform_device_del(wm->battery_dev); batt_reg_err: platform_device_put(wm->battery_dev); batt_err: |