diff options
Diffstat (limited to 'drivers/sbus/char/uctrl.c')
| -rw-r--r-- | drivers/sbus/char/uctrl.c | 422 |
1 files changed, 422 insertions, 0 deletions
diff --git a/drivers/sbus/char/uctrl.c b/drivers/sbus/char/uctrl.c new file mode 100644 index 000000000000..858cc683f85c --- /dev/null +++ b/drivers/sbus/char/uctrl.c @@ -0,0 +1,422 @@ +/* $Id: uctrl.c,v 1.12 2001/10/08 22:19:51 davem Exp $ + * uctrl.c: TS102 Microcontroller interface on Tadpole Sparcbook 3 + * + * Copyright 1999 Derrick J Brashear (shadow@dementia.org) + */ + +#include <linux/module.h> +#include <linux/sched.h> +#include <linux/errno.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/slab.h> +#include <linux/ioport.h> +#include <linux/init.h> +#include <linux/miscdevice.h> +#include <linux/mm.h> + +#include <asm/openprom.h> +#include <asm/oplib.h> +#include <asm/system.h> +#include <asm/irq.h> +#include <asm/io.h> +#include <asm/pgtable.h> +#include <asm/sbus.h> + +#define UCTRL_MINOR 174 + +#define DEBUG 1 +#ifdef DEBUG +#define dprintk(x) printk x +#else +#define dprintk(x) +#endif + +struct uctrl_regs { + volatile u32 uctrl_intr; + volatile u32 uctrl_data; + volatile u32 uctrl_stat; + volatile u32 uctrl_xxx[5]; +}; + +struct ts102_regs { + volatile u32 card_a_intr; + volatile u32 card_a_stat; + volatile u32 card_a_ctrl; + volatile u32 card_a_xxx; + volatile u32 card_b_intr; + volatile u32 card_b_stat; + volatile u32 card_b_ctrl; + volatile u32 card_b_xxx; + volatile u32 uctrl_intr; + volatile u32 uctrl_data; + volatile u32 uctrl_stat; + volatile u32 uctrl_xxx; + volatile u32 ts102_xxx[4]; +}; + +/* Bits for uctrl_intr register */ +#define UCTRL_INTR_TXE_REQ 0x01 /* transmit FIFO empty int req */ +#define UCTRL_INTR_TXNF_REQ 0x02 /* transmit FIFO not full int req */ +#define UCTRL_INTR_RXNE_REQ 0x04 /* receive FIFO not empty int req */ +#define UCTRL_INTR_RXO_REQ 0x08 /* receive FIFO overflow int req */ +#define UCTRL_INTR_TXE_MSK 0x10 /* transmit FIFO empty mask */ +#define UCTRL_INTR_TXNF_MSK 0x20 /* transmit FIFO not full mask */ +#define UCTRL_INTR_RXNE_MSK 0x40 /* receive FIFO not empty mask */ +#define UCTRL_INTR_RXO_MSK 0x80 /* receive FIFO overflow mask */ + +/* Bits for uctrl_stat register */ +#define UCTRL_STAT_TXE_STA 0x01 /* transmit FIFO empty status */ +#define UCTRL_STAT_TXNF_STA 0x02 /* transmit FIFO not full status */ +#define UCTRL_STAT_RXNE_STA 0x04 /* receive FIFO not empty status */ +#define UCTRL_STAT_RXO_STA 0x08 /* receive FIFO overflow status */ + +static const char *uctrl_extstatus[16] = { + "main power available", + "internal battery attached", + "external battery attached", + "external VGA attached", + "external keyboard attached", + "external mouse attached", + "lid down", + "internal battery currently charging", + "external battery currently charging", + "internal battery currently discharging", + "external battery currently discharging", +}; + +/* Everything required for one transaction with the uctrl */ +struct uctrl_txn { + u8 opcode; + u8 inbits; + u8 outbits; + u8 *inbuf; + u8 *outbuf; +}; + +struct uctrl_status { + u8 current_temp; /* 0x07 */ + u8 reset_status; /* 0x0b */ + u16 event_status; /* 0x0c */ + u16 error_status; /* 0x10 */ + u16 external_status; /* 0x11, 0x1b */ + u8 internal_charge; /* 0x18 */ + u8 external_charge; /* 0x19 */ + u16 control_lcd; /* 0x20 */ + u8 control_bitport; /* 0x21 */ + u8 speaker_volume; /* 0x23 */ + u8 control_tft_brightness; /* 0x24 */ + u8 control_kbd_repeat_delay; /* 0x28 */ + u8 control_kbd_repeat_period; /* 0x29 */ + u8 control_screen_contrast; /* 0x2F */ +}; + +enum uctrl_opcode { + READ_SERIAL_NUMBER=0x1, + READ_ETHERNET_ADDRESS=0x2, + READ_HARDWARE_VERSION=0x3, + READ_MICROCONTROLLER_VERSION=0x4, + READ_MAX_TEMPERATURE=0x5, + READ_MIN_TEMPERATURE=0x6, + READ_CURRENT_TEMPERATURE=0x7, + READ_SYSTEM_VARIANT=0x8, + READ_POWERON_CYCLES=0x9, + READ_POWERON_SECONDS=0xA, + READ_RESET_STATUS=0xB, + READ_EVENT_STATUS=0xC, + READ_REAL_TIME_CLOCK=0xD, + READ_EXTERNAL_VGA_PORT=0xE, + READ_MICROCONTROLLER_ROM_CHECKSUM=0xF, + READ_ERROR_STATUS=0x10, + READ_EXTERNAL_STATUS=0x11, + READ_USER_CONFIGURATION_AREA=0x12, + READ_MICROCONTROLLER_VOLTAGE=0x13, + READ_INTERNAL_BATTERY_VOLTAGE=0x14, + READ_DCIN_VOLTAGE=0x15, + READ_HORIZONTAL_POINTER_VOLTAGE=0x16, + READ_VERTICAL_POINTER_VOLTAGE=0x17, + READ_INTERNAL_BATTERY_CHARGE_LEVEL=0x18, + READ_EXTERNAL_BATTERY_CHARGE_LEVEL=0x19, + READ_REAL_TIME_CLOCK_ALARM=0x1A, + READ_EVENT_STATUS_NO_RESET=0x1B, + READ_INTERNAL_KEYBOARD_LAYOUT=0x1C, + READ_EXTERNAL_KEYBOARD_LAYOUT=0x1D, + READ_EEPROM_STATUS=0x1E, + CONTROL_LCD=0x20, + CONTROL_BITPORT=0x21, + SPEAKER_VOLUME=0x23, + CONTROL_TFT_BRIGHTNESS=0x24, + CONTROL_WATCHDOG=0x25, + CONTROL_FACTORY_EEPROM_AREA=0x26, + CONTROL_KBD_TIME_UNTIL_REPEAT=0x28, + CONTROL_KBD_TIME_BETWEEN_REPEATS=0x29, + CONTROL_TIMEZONE=0x2A, + CONTROL_MARK_SPACE_RATIO=0x2B, + CONTROL_DIAGNOSTIC_MODE=0x2E, + CONTROL_SCREEN_CONTRAST=0x2F, + RING_BELL=0x30, + SET_DIAGNOSTIC_STATUS=0x32, + CLEAR_KEY_COMBINATION_TABLE=0x33, + PERFORM_SOFTWARE_RESET=0x34, + SET_REAL_TIME_CLOCK=0x35, + RECALIBRATE_POINTING_STICK=0x36, + SET_BELL_FREQUENCY=0x37, + SET_INTERNAL_BATTERY_CHARGE_RATE=0x39, + SET_EXTERNAL_BATTERY_CHARGE_RATE=0x3A, + SET_REAL_TIME_CLOCK_ALARM=0x3B, + READ_EEPROM=0x40, + WRITE_EEPROM=0x41, + WRITE_TO_STATUS_DISPLAY=0x42, + DEFINE_SPECIAL_CHARACTER=0x43, + DEFINE_KEY_COMBINATION_ENTRY=0x50, + DEFINE_STRING_TABLE_ENTRY=0x51, + DEFINE_STATUS_SCREEN_DISPLAY=0x52, + PERFORM_EMU_COMMANDS=0x64, + READ_EMU_REGISTER=0x65, + WRITE_EMU_REGISTER=0x66, + READ_EMU_RAM=0x67, + WRITE_EMU_RAM=0x68, + READ_BQ_REGISTER=0x69, + WRITE_BQ_REGISTER=0x6A, + SET_USER_PASSWORD=0x70, + VERIFY_USER_PASSWORD=0x71, + GET_SYSTEM_PASSWORD_KEY=0x72, + VERIFY_SYSTEM_PASSWORD=0x73, + POWER_OFF=0x82, + POWER_RESTART=0x83, +}; + +struct uctrl_driver { + struct uctrl_regs *regs; + int irq; + int pending; + struct uctrl_status status; +}; + +static struct uctrl_driver drv; + +void uctrl_get_event_status(void); +void uctrl_get_external_status(void); + +static int +uctrl_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) +{ + switch (cmd) { + default: + return -EINVAL; + } + return 0; +} + +static int +uctrl_open(struct inode *inode, struct file *file) +{ + uctrl_get_event_status(); + uctrl_get_external_status(); + return 0; +} + +static irqreturn_t uctrl_interrupt(int irq, void *dev_id, struct pt_regs *regs) +{ + struct uctrl_driver *driver = (struct uctrl_driver *)dev_id; + printk("in uctrl_interrupt\n"); + return IRQ_HANDLED; +} + +static struct file_operations uctrl_fops = { + .owner = THIS_MODULE, + .llseek = no_llseek, + .ioctl = uctrl_ioctl, + .open = uctrl_open, +}; + +static struct miscdevice uctrl_dev = { + UCTRL_MINOR, + "uctrl", + &uctrl_fops +}; + +/* Wait for space to write, then write to it */ +#define WRITEUCTLDATA(value) \ +{ \ + unsigned int i; \ + for (i = 0; i < 10000; i++) { \ + if (UCTRL_STAT_TXNF_STA & driver->regs->uctrl_stat) \ + break; \ + } \ + dprintk(("write data 0x%02x\n", value)); \ + driver->regs->uctrl_data = value; \ +} + +/* Wait for something to read, read it, then clear the bit */ +#define READUCTLDATA(value) \ +{ \ + unsigned int i; \ + value = 0; \ + for (i = 0; i < 10000; i++) { \ + if ((UCTRL_STAT_RXNE_STA & driver->regs->uctrl_stat) == 0) \ + break; \ + udelay(1); \ + } \ + value = driver->regs->uctrl_data; \ + dprintk(("read data 0x%02x\n", value)); \ + driver->regs->uctrl_stat = UCTRL_STAT_RXNE_STA; \ +} + +void uctrl_set_video(int status) +{ + struct uctrl_driver *driver = &drv; + +} + +static void uctrl_do_txn(struct uctrl_txn *txn) +{ + struct uctrl_driver *driver = &drv; + int stat, incnt, outcnt, bytecnt, intr; + u32 byte; + + stat = driver->regs->uctrl_stat; + intr = driver->regs->uctrl_intr; + driver->regs->uctrl_stat = stat; + + dprintk(("interrupt stat 0x%x int 0x%x\n", stat, intr)); + + incnt = txn->inbits; + outcnt = txn->outbits; + byte = (txn->opcode << 8); + WRITEUCTLDATA(byte); + + bytecnt = 0; + while (incnt > 0) { + byte = (txn->inbuf[bytecnt] << 8); + WRITEUCTLDATA(byte); + incnt--; + bytecnt++; + } + + /* Get the ack */ + READUCTLDATA(byte); + dprintk(("ack was %x\n", (byte >> 8))); + + bytecnt = 0; + while (outcnt > 0) { + READUCTLDATA(byte); + txn->outbuf[bytecnt] = (byte >> 8); + dprintk(("set byte to %02x\n", byte)); + outcnt--; + bytecnt++; + } +} + +void uctrl_get_event_status() +{ + struct uctrl_driver *driver = &drv; + struct uctrl_txn txn; + u8 outbits[2]; + + txn.opcode = READ_EVENT_STATUS; + txn.inbits = 0; + txn.outbits = 2; + txn.inbuf = 0; + txn.outbuf = outbits; + + uctrl_do_txn(&txn); + + dprintk(("bytes %x %x\n", (outbits[0] & 0xff), (outbits[1] & 0xff))); + driver->status.event_status = + ((outbits[0] & 0xff) << 8) | (outbits[1] & 0xff); + dprintk(("ev is %x\n", driver->status.event_status)); +} + +void uctrl_get_external_status() +{ + struct uctrl_driver *driver = &drv; + struct uctrl_txn txn; + u8 outbits[2]; + int i, v; + + txn.opcode = READ_EXTERNAL_STATUS; + txn.inbits = 0; + txn.outbits = 2; + txn.inbuf = 0; + txn.outbuf = outbits; + + uctrl_do_txn(&txn); + + dprintk(("bytes %x %x\n", (outbits[0] & 0xff), (outbits[1] & 0xff))); + driver->status.external_status = + ((outbits[0] * 256) + (outbits[1])); + dprintk(("ex is %x\n", driver->status.external_status)); + v = driver->status.external_status; + for (i = 0; v != 0; i++, v >>= 1) { + if (v & 1) { + dprintk(("%s%s", " ", uctrl_extstatus[i])); + } + } + dprintk(("\n")); + +} + +static int __init ts102_uctrl_init(void) +{ + struct uctrl_driver *driver = &drv; + int len, i; + struct linux_prom_irqs tmp_irq[2]; + unsigned int vaddr[2] = { 0, 0 }; + int tmpnode, uctrlnode = prom_getchild(prom_root_node); + + tmpnode = prom_searchsiblings(uctrlnode, "obio"); + + if (tmpnode) + uctrlnode = prom_getchild(tmpnode); + + uctrlnode = prom_searchsiblings(uctrlnode, "uctrl"); + + if (!uctrlnode) + return -ENODEV; + + /* the prom mapped it for us */ + len = prom_getproperty(uctrlnode, "address", (void *) vaddr, + sizeof(vaddr)); + driver->regs = (struct uctrl_regs *)vaddr[0]; + + len = prom_getproperty(uctrlnode, "intr", (char *) tmp_irq, + sizeof(tmp_irq)); + + /* Flush device */ + READUCTLDATA(len); + + if(!driver->irq) + driver->irq = tmp_irq[0].pri; + + request_irq(driver->irq, uctrl_interrupt, 0, "uctrl", driver); + + if (misc_register(&uctrl_dev)) { + printk("%s: unable to get misc minor %d\n", + __FUNCTION__, uctrl_dev.minor); + free_irq(driver->irq, driver); + return -ENODEV; + } + + driver->regs->uctrl_intr = UCTRL_INTR_RXNE_REQ|UCTRL_INTR_RXNE_MSK; + printk("uctrl: 0x%x (irq %s)\n", driver->regs, __irq_itoa(driver->irq)); + uctrl_get_event_status(); + uctrl_get_external_status(); + return 0; +} + +static void __exit ts102_uctrl_cleanup(void) +{ + struct uctrl_driver *driver = &drv; + + misc_deregister(&uctrl_dev); + if (driver->irq) + free_irq(driver->irq, driver); + if (driver->regs) + driver->regs = 0; +} + +module_init(ts102_uctrl_init); +module_exit(ts102_uctrl_cleanup); +MODULE_LICENSE("GPL"); |