diff options
| -rw-r--r-- | arch/arm/mach-davinci/board-evm.c | 337 |
1 files changed, 322 insertions, 15 deletions
diff --git a/arch/arm/mach-davinci/board-evm.c b/arch/arm/mach-davinci/board-evm.c index 2db7b78..9581675 100644 --- a/arch/arm/mach-davinci/board-evm.c +++ b/arch/arm/mach-davinci/board-evm.c @@ -13,6 +13,13 @@ #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> @@ -20,13 +27,14 @@ #include <asm/setup.h> #include <asm/io.h> #include <asm/mach-types.h> -#include <mach/hardware.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); @@ -34,10 +42,10 @@ void __init davinci_irq_init(void); void __init davinci_map_common_io(void); void __init davinci_init_common_hw(void); -/* NOR Flash base address set to CS0 by default */ -#define NOR_FLASH_PHYS 0x02000000 +#if defined(CONFIG_MTD_PHYSMAP) || \ + defined(CONFIG_MTD_PHYSMAP_MODULE) -static struct mtd_partition davinci_evm_partitions[] = { +static struct mtd_partition davinci_evm_norflash_partitions[] = { /* bootloader (U-Boot, etc) in first 4 sectors */ { .name = "bootloader", @@ -68,32 +76,323 @@ static struct mtd_partition davinci_evm_partitions[] = { } }; -static struct physmap_flash_data davinci_evm_flash_data = { +static struct physmap_flash_data davinci_evm_norflash_data = { .width = 2, - .parts = davinci_evm_partitions, - .nr_parts = ARRAY_SIZE(davinci_evm_partitions), + .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_flash_resource = { - .start = NOR_FLASH_PHYS, - .end = NOR_FLASH_PHYS + SZ_16M - 1, +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_flash_device = { +static struct platform_device davinci_evm_norflash_device = { .name = "physmap-flash", .id = 0, .dev = { - .platform_data = &davinci_evm_flash_data, + .platform_data = &davinci_evm_norflash_data, }, .num_resources = 1, - .resource = &davinci_evm_flash_resource, + .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 = { - &davinci_evm_flash_device, +#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 @@ -106,13 +405,21 @@ static __init void davinci_evm_init(void) { davinci_psc_init(); -#if defined(CONFIG_BLK_DEV_DAVINCI) || defined(CONFIG_BLK_DEV_DAVINCI_MODULE) +#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) |
