282 lines
7.1 KiB
C
282 lines
7.1 KiB
C
/*
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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/nand.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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.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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.ecc_mode = NAND_ECC_HW_SYNDROME,
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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 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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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 (IS_ERR(aemif))
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WARN("%s: unable to get AEMIF clock\n", __func__);
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else
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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 = davinci_irq_init,
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.init_time = davinci_timer_init,
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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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.restart = davinci_restart,
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MACHINE_END
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