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282 lines
7.1 KiB
282 lines
7.1 KiB
/* |
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* DM355 leopard board support |
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* |
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* Based on board-dm355-evm.c |
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* |
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* This file is licensed under the terms of the GNU General Public |
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* License version 2. This program is licensed "as is" without any |
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* warranty of any kind, whether express or implied. |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/init.h> |
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#include <linux/err.h> |
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#include <linux/platform_device.h> |
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#include <linux/mtd/mtd.h> |
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#include <linux/mtd/partitions.h> |
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#include <linux/mtd/rawnand.h> |
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#include <linux/i2c.h> |
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#include <linux/gpio.h> |
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#include <linux/clk.h> |
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#include <linux/spi/spi.h> |
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#include <linux/spi/eeprom.h> |
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#include <linux/platform_data/i2c-davinci.h> |
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#include <linux/platform_data/mmc-davinci.h> |
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#include <linux/platform_data/mtd-davinci.h> |
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#include <linux/platform_data/usb-davinci.h> |
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#include <asm/mach-types.h> |
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#include <asm/mach/arch.h> |
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#include <mach/common.h> |
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#include <mach/serial.h> |
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#include "davinci.h" |
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/* NOTE: this is geared for the standard config, with a socketed |
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* 2 GByte Micron NAND (MT29F16G08FAA) using 128KB sectors. If you |
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* swap chips, maybe with a different block size, partitioning may |
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* need to be changed. |
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*/ |
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#define NAND_BLOCK_SIZE SZ_128K |
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static struct mtd_partition davinci_nand_partitions[] = { |
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{ |
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/* UBL (a few copies) plus U-Boot */ |
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.name = "bootloader", |
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.offset = 0, |
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.size = 15 * NAND_BLOCK_SIZE, |
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.mask_flags = MTD_WRITEABLE, /* force read-only */ |
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}, { |
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/* U-Boot environment */ |
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.name = "params", |
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.offset = MTDPART_OFS_APPEND, |
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.size = 1 * NAND_BLOCK_SIZE, |
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.mask_flags = 0, |
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}, { |
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.name = "kernel", |
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.offset = MTDPART_OFS_APPEND, |
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.size = SZ_4M, |
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.mask_flags = 0, |
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}, { |
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.name = "filesystem1", |
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.offset = MTDPART_OFS_APPEND, |
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.size = SZ_512M, |
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.mask_flags = 0, |
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}, { |
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.name = "filesystem2", |
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.offset = MTDPART_OFS_APPEND, |
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.size = MTDPART_SIZ_FULL, |
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.mask_flags = 0, |
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} |
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/* two blocks with bad block table (and mirror) at the end */ |
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}; |
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static struct davinci_nand_pdata davinci_nand_data = { |
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.core_chipsel = 0, |
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.mask_chipsel = BIT(14), |
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.parts = davinci_nand_partitions, |
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.nr_parts = ARRAY_SIZE(davinci_nand_partitions), |
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.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST, |
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.ecc_placement = NAND_ECC_PLACEMENT_INTERLEAVED, |
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.ecc_bits = 4, |
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.bbt_options = NAND_BBT_USE_FLASH, |
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}; |
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static struct resource davinci_nand_resources[] = { |
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{ |
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.start = DM355_ASYNC_EMIF_DATA_CE0_BASE, |
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.end = DM355_ASYNC_EMIF_DATA_CE0_BASE + SZ_32M - 1, |
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.flags = IORESOURCE_MEM, |
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}, { |
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.start = DM355_ASYNC_EMIF_CONTROL_BASE, |
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.end = DM355_ASYNC_EMIF_CONTROL_BASE + SZ_4K - 1, |
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.flags = IORESOURCE_MEM, |
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}, |
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}; |
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static struct platform_device davinci_nand_device = { |
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.name = "davinci_nand", |
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.id = 0, |
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.num_resources = ARRAY_SIZE(davinci_nand_resources), |
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.resource = davinci_nand_resources, |
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.dev = { |
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.platform_data = &davinci_nand_data, |
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}, |
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}; |
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static struct davinci_i2c_platform_data i2c_pdata = { |
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.bus_freq = 400 /* kHz */, |
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.bus_delay = 0 /* usec */, |
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}; |
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static int leopard_mmc_gpio = -EINVAL; |
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static void dm355leopard_mmcsd_gpios(unsigned gpio) |
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{ |
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gpio_request(gpio + 0, "mmc0_ro"); |
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gpio_request(gpio + 1, "mmc0_cd"); |
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gpio_request(gpio + 2, "mmc1_ro"); |
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gpio_request(gpio + 3, "mmc1_cd"); |
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/* we "know" these are input-only so we don't |
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* need to call gpio_direction_input() |
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*/ |
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leopard_mmc_gpio = gpio; |
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} |
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static struct i2c_board_info dm355leopard_i2c_info[] = { |
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{ I2C_BOARD_INFO("dm355leopard_msp", 0x25), |
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.platform_data = dm355leopard_mmcsd_gpios, |
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/* plus irq */ }, |
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/* { I2C_BOARD_INFO("tlv320aic3x", 0x1b), }, */ |
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/* { I2C_BOARD_INFO("tvp5146", 0x5d), }, */ |
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}; |
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static void __init leopard_init_i2c(void) |
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{ |
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davinci_init_i2c(&i2c_pdata); |
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gpio_request(5, "dm355leopard_msp"); |
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gpio_direction_input(5); |
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dm355leopard_i2c_info[0].irq = gpio_to_irq(5); |
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i2c_register_board_info(1, dm355leopard_i2c_info, |
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ARRAY_SIZE(dm355leopard_i2c_info)); |
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} |
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static struct resource dm355leopard_dm9000_rsrc[] = { |
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{ |
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/* addr */ |
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.start = 0x04000000, |
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.end = 0x04000001, |
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.flags = IORESOURCE_MEM, |
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}, { |
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/* data */ |
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.start = 0x04000016, |
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.end = 0x04000017, |
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.flags = IORESOURCE_MEM, |
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}, { |
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.flags = IORESOURCE_IRQ |
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| IORESOURCE_IRQ_HIGHEDGE /* rising (active high) */, |
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}, |
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}; |
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static struct platform_device dm355leopard_dm9000 = { |
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.name = "dm9000", |
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.id = -1, |
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.resource = dm355leopard_dm9000_rsrc, |
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.num_resources = ARRAY_SIZE(dm355leopard_dm9000_rsrc), |
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}; |
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static struct platform_device *davinci_leopard_devices[] __initdata = { |
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&dm355leopard_dm9000, |
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&davinci_nand_device, |
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}; |
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static void __init dm355_leopard_map_io(void) |
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{ |
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dm355_init(); |
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} |
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static int dm355leopard_mmc_get_cd(int module) |
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{ |
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if (!gpio_is_valid(leopard_mmc_gpio)) |
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return -ENXIO; |
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/* low == card present */ |
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return !gpio_get_value_cansleep(leopard_mmc_gpio + 2 * module + 1); |
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} |
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static int dm355leopard_mmc_get_ro(int module) |
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{ |
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if (!gpio_is_valid(leopard_mmc_gpio)) |
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return -ENXIO; |
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/* high == card's write protect switch active */ |
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return gpio_get_value_cansleep(leopard_mmc_gpio + 2 * module + 0); |
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} |
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static struct davinci_mmc_config dm355leopard_mmc_config = { |
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.get_cd = dm355leopard_mmc_get_cd, |
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.get_ro = dm355leopard_mmc_get_ro, |
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.wires = 4, |
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.max_freq = 50000000, |
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.caps = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED, |
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}; |
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/* Don't connect anything to J10 unless you're only using USB host |
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* mode *and* have to do so with some kind of gender-bender. If |
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* you have proper Mini-B or Mini-A cables (or Mini-A adapters) |
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* the ID pin won't need any help. |
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*/ |
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#define USB_ID_VALUE 1 /* ID pulled low */ |
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static struct spi_eeprom at25640a = { |
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.byte_len = SZ_64K / 8, |
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.name = "at25640a", |
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.page_size = 32, |
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.flags = EE_ADDR2, |
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}; |
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static const struct spi_board_info dm355_leopard_spi_info[] __initconst = { |
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{ |
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.modalias = "at25", |
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.platform_data = &at25640a, |
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.max_speed_hz = 10 * 1000 * 1000, /* at 3v3 */ |
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.bus_num = 0, |
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.chip_select = 0, |
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.mode = SPI_MODE_0, |
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}, |
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}; |
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static __init void dm355_leopard_init(void) |
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{ |
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struct clk *aemif; |
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int ret; |
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dm355_register_clocks(); |
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ret = dm355_gpio_register(); |
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if (ret) |
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pr_warn("%s: GPIO init failed: %d\n", __func__, ret); |
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gpio_request(9, "dm9000"); |
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gpio_direction_input(9); |
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dm355leopard_dm9000_rsrc[2].start = gpio_to_irq(9); |
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aemif = clk_get(&dm355leopard_dm9000.dev, "aemif"); |
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if (!WARN(IS_ERR(aemif), "unable to get AEMIF clock\n")) |
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clk_prepare_enable(aemif); |
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platform_add_devices(davinci_leopard_devices, |
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ARRAY_SIZE(davinci_leopard_devices)); |
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leopard_init_i2c(); |
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davinci_serial_init(dm355_serial_device); |
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/* NOTE: NAND flash timings set by the UBL are slower than |
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* needed by MT29F16G08FAA chips ... EMIF.A1CR is 0x40400204 |
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* but could be 0x0400008c for about 25% faster page reads. |
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*/ |
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gpio_request(2, "usb_id_toggle"); |
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gpio_direction_output(2, USB_ID_VALUE); |
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/* irlml6401 switches over 1A in under 8 msec */ |
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davinci_setup_usb(1000, 8); |
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davinci_setup_mmc(0, &dm355leopard_mmc_config); |
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davinci_setup_mmc(1, &dm355leopard_mmc_config); |
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dm355_init_spi0(BIT(0), dm355_leopard_spi_info, |
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ARRAY_SIZE(dm355_leopard_spi_info)); |
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} |
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MACHINE_START(DM355_LEOPARD, "DaVinci DM355 leopard") |
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.atag_offset = 0x100, |
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.map_io = dm355_leopard_map_io, |
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.init_irq = dm355_init_irq, |
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.init_time = dm355_init_time, |
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.init_machine = dm355_leopard_init, |
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.init_late = davinci_init_late, |
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.dma_zone_size = SZ_128M, |
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MACHINE_END
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