/* * 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