/*
* TI DaVinci EVM board support
*
* Author: Kevin Hilman, MontaVista Software, Inc. <source@mvista.com>
*
* 2007 (c) MontaVista Software, Inc. This file is licensed under
* the terms of the GNU General Public License version 2. This program
* is licensed "as is" without any warranty of any kind, whether express
* or implied.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/leds.h>
#include <linux/i2c.h>
#include <linux/i2c/pcf857x.h>
#include <linux/i2c/at24.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/physmap.h>
#include <linux/io.h>
#include <asm/setup.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/flash.h>
#include <mach/hardware.h>
#include <mach/common.h>
#include <mach/i2c.h>
/* other misc. init functions */
void __init davinci_psc_init(void);
void __init davinci_irq_init(void);
void __init davinci_map_common_io(void);
void __init davinci_init_common_hw(void);
#if defined(CONFIG_MTD_PHYSMAP) || \
defined(CONFIG_MTD_PHYSMAP_MODULE)
static struct mtd_partition davinci_evm_norflash_partitions[] = {
/* bootloader (U-Boot, etc) in first 4 sectors */
{
.name = "bootloader",
.offset = 0,
.size = 4 * SZ_64K,
.mask_flags = MTD_WRITEABLE, /* force read-only */
},
/* bootloader params in the next 1 sectors */
{
.name = "params",
.offset = MTDPART_OFS_APPEND,
.size = SZ_64K,
.mask_flags = 0,
},
/* kernel */
{
.name = "kernel",
.offset = MTDPART_OFS_APPEND,
.size = SZ_2M,
.mask_flags = 0
},
/* file system */
{
.name = "filesystem",
.offset = MTDPART_OFS_APPEND,
.size = MTDPART_SIZ_FULL,
.mask_flags = 0
}
};
static struct physmap_flash_data davinci_evm_norflash_data = {
.width = 2,
.parts = davinci_evm_norflash_partitions,
.nr_parts = ARRAY_SIZE(davinci_evm_norflash_partitions),
};
/* NOTE: CFI probe will correctly detect flash part as 32M, but EMIF
* limits addresses to 16M, so using addresses past 16M will wrap */
static struct resource davinci_evm_norflash_resource = {
.start = DAVINCI_ASYNC_EMIF_DATA_CE0_BASE,
.end = DAVINCI_ASYNC_EMIF_DATA_CE0_BASE + SZ_16M - 1,
.flags = IORESOURCE_MEM,
};
static struct platform_device davinci_evm_norflash_device = {
.name = "physmap-flash",
.id = 0,
.dev = {
.platform_data = &davinci_evm_norflash_data,
},
.num_resources = 1,
.resource = &davinci_evm_norflash_resource,
};
#endif
#if defined(CONFIG_BLK_DEV_PALMCHIP_BK3710) || \
defined(CONFIG_BLK_DEV_PALMCHIP_BK3710_MODULE)
static struct resource ide_resources[] = {
{
.start = DAVINCI_CFC_ATA_BASE,
.end = DAVINCI_CFC_ATA_BASE + 0x7ff,
.flags = IORESOURCE_MEM,
},
{
.start = IRQ_IDE,
.end = IRQ_IDE,
.flags = IORESOURCE_IRQ,
},
};
static u64 ide_dma_mask = DMA_32BIT_MASK;
static struct platform_device ide_dev = {
.name = "palm_bk3710",
.id = -1,
.resource = ide_resources,
.num_resources = ARRAY_SIZE(ide_resources),
.dev = {
.dma_mask = &ide_dma_mask,
.coherent_dma_mask = DMA_32BIT_MASK,
},
};
#endif
/*----------------------------------------------------------------------*/
/*
* I2C GPIO expanders
*/
#define PCF_Uxx_BASE(x) (DAVINCI_N_GPIO + ((x) * 8))
/* U2 -- LEDs */
static struct gpio_led evm_leds[] = {
{ .name = "DS8", .active_low = 1,
.default_trigger = "heartbeat", },
{ .name = "DS7", .active_low = 1, },
{ .name = "DS6", .active_low = 1, },
{ .name = "DS5", .active_low = 1, },
{ .name = "DS4", .active_low = 1, },
{ .name = "DS3", .active_low = 1, },
{ .name = "DS2", .active_low = 1,
.default_trigger = "mmc0", },
{ .name = "DS1", .active_low = 1,
.default_trigger = "ide-disk", },
};
static const struct gpio_led_platform_data evm_led_data = {
.num_leds = ARRAY_SIZE(evm_leds),
.leds = evm_leds,
};
static struct platform_device *evm_led_dev;
static int
evm_led_setup(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
{
struct gpio_led *leds = evm_leds;
int status;
while (ngpio--) {
leds->gpio = gpio++;
leds++;
}
/* what an extremely annoying way to be forced to handle
* device unregistration ...
*/
evm_led_dev = platform_device_alloc("leds-gpio", 0);
platform_device_add_data(evm_led_dev,
&evm_led_data, sizeof evm_led_data);
evm_led_dev->dev.parent = &client->dev;
status = platform_device_add(evm_led_dev);
if (status < 0) {
platform_device_put(evm_led_dev);
evm_led_dev = NULL;
}
return status;
}
static int
evm_led_teardown(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
{
if (evm_led_dev) {
platform_device_unregister(evm_led_dev);
evm_led_dev = NULL;
}
return 0;
}
static struct pcf857x_platform_data pcf_data_u2 = {
.gpio_base = PCF_Uxx_BASE(0),
.setup = evm_led_setup,
.teardown = evm_led_teardown,
};
/* U18 - A/V clock generator and user switch */
static int sw_gpio;
static ssize_t
sw_show(struct device *d, struct device_attribute *a, char *buf)
{
char *s = gpio_get_value_cansleep(sw_gpio) ? "on\n" : "off\n";
strcpy(buf, s);
return strlen(s);
}
static DEVICE_ATTR(user_sw, S_IRUGO, sw_show, NULL);
static int
evm_u18_setup(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
{
int status;
/* export dip switch option */
sw_gpio = gpio + 7;
status = gpio_request(sw_gpio, "user_sw");
if (status == 0)
status = gpio_direction_input(sw_gpio);
if (status == 0)
status = device_create_file(&client->dev, &dev_attr_user_sw);
else
gpio_free(sw_gpio);
if (status != 0)
sw_gpio = -EINVAL;
/* audio PLL: 48 kHz (vs 44.1 or 32), single rate (vs double) */
gpio_request(gpio + 3, "pll_fs2");
gpio_direction_output(gpio + 3, 0);
gpio_request(gpio + 2, "pll_fs1");
gpio_direction_output(gpio + 2, 0);
gpio_request(gpio + 1, "pll_sr");
gpio_direction_output(gpio + 1, 0);
return 0;
}
static int
evm_u18_teardown(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
{
gpio_free(gpio + 1);
gpio_free(gpio + 2);
gpio_free(gpio + 3);
if (sw_gpio > 0) {
device_remove_file(&client->dev, &dev_attr_user_sw);
gpio_free(sw_gpio);
}
return 0;
}
static struct pcf857x_platform_data pcf_data_u18 = {
.gpio_base = PCF_Uxx_BASE(1),
.n_latch = (1 << 3) | (1 << 2) | (1 << 1),
.setup = evm_u18_setup,
.teardown = evm_u18_teardown,
};
/* U35 - various I/O signals used to manage USB, CF, ATA, etc */
static int
evm_u35_setup(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
{
/* p0 = nDRV_VBUS (initial: don't supply it) */
gpio_request(gpio + 0, "nDRV_VBUS");
gpio_direction_output(gpio + 0, 1);
/* p1 = VDDIMX_EN */
gpio_request(gpio + 1, "VDDIMX_EN");
gpio_direction_output(gpio + 1, 1);
/* p2 = VLYNQ_EN */
gpio_request(gpio + 2, "VLYNQ_EN");
gpio_direction_output(gpio + 2, 1);
/* p3 = n3V3_CF_RESET (initial: stay in reset) */
gpio_request(gpio + 3, "nCF_RESET");
gpio_direction_output(gpio + 3, 0);
/* (p4 unused) */
/* p5 = 1V8_WLAN_RESET (initial: stay in reset) */
gpio_request(gpio + 5, "WLAN_RESET");
gpio_direction_output(gpio + 5, 1);
/* p6 = nATA_SEL (initial: select) */
gpio_request(gpio + 6, "nATA_SEL");
gpio_direction_output(gpio + 6, 0);
/* p7 = nCF_SEL (initial: deselect) */
gpio_request(gpio + 7, "nCF_SEL");
gpio_direction_output(gpio + 7, 1);
return 0;
}
static int
evm_u35_teardown(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
{
gpio_free(gpio + 7);
gpio_free(gpio + 6);
gpio_free(gpio + 5);
gpio_free(gpio + 3);
gpio_free(gpio + 2);
gpio_free(gpio + 1);
gpio_free(gpio + 0);
return 0;
}
static struct pcf857x_platform_data pcf_data_u35 = {
.gpio_base = PCF_Uxx_BASE(2),
.setup = evm_u35_setup,
.teardown = evm_u35_teardown,
};
/*----------------------------------------------------------------------*/
/* Most of this EEPROM is unused, but U-Boot uses some data:
* - 0x7f00, 6 bytes Ethernet Address
* - 0x0039, 1 byte NTSC vs PAL (bit 0x80 == PAL)
* - ... newer boards may have more
*/
static struct at24_platform_data eeprom_info = {
.byte_len = (256*1024) / 8,
.page_size = 64,
.flags = AT24_FLAG_ADDR16,
};
static struct i2c_board_info __initdata i2c_info[] = {
{
I2C_BOARD_INFO("pcf8574", 0x38),
.platform_data = &pcf_data_u2,
},
{
I2C_BOARD_INFO("pcf8574", 0x39),
.platform_data = &pcf_data_u18,
},
{
I2C_BOARD_INFO("pcf8574", 0x3a),
.platform_data = &pcf_data_u35,
},
{
I2C_BOARD_INFO("24c256", 0x50),
.platform_data = &eeprom_info,
},
/* ALSO:
* - tvl320aic33 audio codec (0x1b)
* - msp430 microcontroller (0x23)
* - tvp5146 video decoder (0x5d)
*/
};
/* The msp430 uses a slow bitbanged I2C implementation (ergo 20 KHz),
* which requires 100 usec of idle bus after i2c writes sent to it.
*/
static struct davinci_i2c_platform_data i2c_pdata = {
.bus_freq = 20 /* kHz */,
.bus_delay = 100 /* usec */,
};
static void __init evm_init_i2c(void)
{
davinci_init_i2c(&i2c_pdata);
i2c_register_board_info(1, i2c_info, ARRAY_SIZE(i2c_info));
}
static struct platform_device *davinci_evm_devices[] __initdata = {
#if defined(CONFIG_MTD_PHYSMAP) || \
defined(CONFIG_MTD_PHYSMAP_MODULE)
&davinci_evm_norflash_device,
#endif
#if defined(CONFIG_BLK_DEV_PALMCHIP_BK3710) || \
defined(CONFIG_BLK_DEV_PALMCHIP_BK3710_MODULE)
&ide_dev,
#endif
};
static void __init
davinci_evm_map_io(void)
{
davinci_map_common_io();
}
static __init void davinci_evm_init(void)
{
davinci_psc_init();
#if defined(CONFIG_BLK_DEV_PALMCHIP_BK3710) || \
defined(CONFIG_BLK_DEV_PALMCHIP_BK3710_MODULE)
#if defined(CONFIG_MTD_PHYSMAP) || \
defined(CONFIG_MTD_PHYSMAP_MODULE)
printk(KERN_WARNING "WARNING: both IDE and NOR flash are enabled, "
"but share pins.\n\t Disable IDE for NOR support.\n");
#endif
#endif
platform_add_devices(davinci_evm_devices,
ARRAY_SIZE(davinci_evm_devices));
evm_init_i2c();
/* irlml6401 sustains over 3A, switches 5V in under 8 msec */
setup_usb(500, 8);
}
static __init void davinci_evm_irq_init(void)
{
davinci_init_common_hw();
davinci_irq_init();
}
MACHINE_START(DAVINCI_EVM, "DaVinci EVM")
/* Maintainer: MontaVista Software <source@mvista.com> */
.phys_io = IO_PHYS,
.io_pg_offst = (__IO_ADDRESS(IO_PHYS) >> 18) & 0xfffc,
.boot_params = (DAVINCI_DDR_BASE + 0x100),
.map_io = davinci_evm_map_io,
.init_irq = davinci_evm_irq_init,
.timer = &davinci_timer,
.init_machine = davinci_evm_init,
MACHINE_END
