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board-dm355-leopard.c

/*
 * DM355 leopard board support
 *
 * Based on board-dm355-evm.c
 *
 * 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/init.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/nand.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/clk.h>
#include <linux/spi/spi.h>
#include <linux/spi/eeprom.h>

#include <asm/mach-types.h>
#include <asm/mach/arch.h>

#include <mach/dm355.h>
#include <mach/i2c.h>
#include <mach/serial.h>
#include <mach/nand.h>
#include <mach/mmc.h>
#include <mach/usb.h>

/* NOTE:  this is geared for the standard config, with a socketed
 * 2 GByte Micron NAND (MT29F16G08FAA) using 128KB sectors.  If you
 * swap chips, maybe with a different block size, partitioning may
 * need to be changed.
 */
#define NAND_BLOCK_SIZE       SZ_128K

static struct mtd_partition davinci_nand_partitions[] = {
      {
            /* UBL (a few copies) plus U-Boot */
            .name       = "bootloader",
            .offset           = 0,
            .size       = 15 * NAND_BLOCK_SIZE,
            .mask_flags = MTD_WRITEABLE, /* force read-only */
      }, {
            /* U-Boot environment */
            .name       = "params",
            .offset           = MTDPART_OFS_APPEND,
            .size       = 1 * NAND_BLOCK_SIZE,
            .mask_flags = 0,
      }, {
            .name       = "kernel",
            .offset           = MTDPART_OFS_APPEND,
            .size       = SZ_4M,
            .mask_flags = 0,
      }, {
            .name       = "filesystem1",
            .offset           = MTDPART_OFS_APPEND,
            .size       = SZ_512M,
            .mask_flags = 0,
      }, {
            .name       = "filesystem2",
            .offset           = MTDPART_OFS_APPEND,
            .size       = MTDPART_SIZ_FULL,
            .mask_flags = 0,
      }
      /* two blocks with bad block table (and mirror) at the end */
};

static struct davinci_nand_pdata davinci_nand_data = {
      .mask_chipsel           = BIT(14),
      .parts                  = davinci_nand_partitions,
      .nr_parts         = ARRAY_SIZE(davinci_nand_partitions),
      .ecc_mode         = NAND_ECC_HW_SYNDROME,
      .options          = NAND_USE_FLASH_BBT,
};

static struct resource davinci_nand_resources[] = {
      {
            .start            = DM355_ASYNC_EMIF_DATA_CE0_BASE,
            .end        = DM355_ASYNC_EMIF_DATA_CE0_BASE + SZ_32M - 1,
            .flags            = IORESOURCE_MEM,
      }, {
            .start            = DM355_ASYNC_EMIF_CONTROL_BASE,
            .end        = DM355_ASYNC_EMIF_CONTROL_BASE + SZ_4K - 1,
            .flags            = IORESOURCE_MEM,
      },
};

static struct platform_device davinci_nand_device = {
      .name             = "davinci_nand",
      .id               = 0,

      .num_resources          = ARRAY_SIZE(davinci_nand_resources),
      .resource         = davinci_nand_resources,

      .dev              = {
            .platform_data    = &davinci_nand_data,
      },
};

static struct davinci_i2c_platform_data i2c_pdata = {
      .bus_freq   = 400 /* kHz */,
      .bus_delay  = 0   /* usec */,
};

static int leopard_mmc_gpio = -EINVAL;

static void dm355leopard_mmcsd_gpios(unsigned gpio)
{
      gpio_request(gpio + 0, "mmc0_ro");
      gpio_request(gpio + 1, "mmc0_cd");
      gpio_request(gpio + 2, "mmc1_ro");
      gpio_request(gpio + 3, "mmc1_cd");

      /* we "know" these are input-only so we don't
       * need to call gpio_direction_input()
       */

      leopard_mmc_gpio = gpio;
}

static struct i2c_board_info dm355leopard_i2c_info[] = {
      { I2C_BOARD_INFO("dm355leopard_msp", 0x25),
            .platform_data = dm355leopard_mmcsd_gpios,
            /* plus irq */ },
      /* { I2C_BOARD_INFO("tlv320aic3x", 0x1b), }, */
      /* { I2C_BOARD_INFO("tvp5146", 0x5d), }, */
};

static void __init leopard_init_i2c(void)
{
      davinci_init_i2c(&i2c_pdata);

      gpio_request(5, "dm355leopard_msp");
      gpio_direction_input(5);
      dm355leopard_i2c_info[0].irq = gpio_to_irq(5);

      i2c_register_board_info(1, dm355leopard_i2c_info,
                  ARRAY_SIZE(dm355leopard_i2c_info));
}

static struct resource dm355leopard_dm9000_rsrc[] = {
      {
            /* addr */
            .start      = 0x04000000,
            .end  = 0x04000001,
            .flags      = IORESOURCE_MEM,
      }, {
            /* data */
            .start      = 0x04000016,
            .end  = 0x04000017,
            .flags      = IORESOURCE_MEM,
      }, {
            .flags      = IORESOURCE_IRQ
                  | IORESOURCE_IRQ_HIGHEDGE /* rising (active high) */,
      },
};

static struct platform_device dm355leopard_dm9000 = {
      .name       = "dm9000",
      .id         = -1,
      .resource   = dm355leopard_dm9000_rsrc,
      .num_resources    = ARRAY_SIZE(dm355leopard_dm9000_rsrc),
};

static struct platform_device *davinci_leopard_devices[] __initdata = {
      &dm355leopard_dm9000,
      &davinci_nand_device,
};

static struct davinci_uart_config uart_config __initdata = {
      .enabled_uarts = (1 << 0),
};

static void __init dm355_leopard_map_io(void)
{
      dm355_init();
}

static int dm355leopard_mmc_get_cd(int module)
{
      if (!gpio_is_valid(leopard_mmc_gpio))
            return -ENXIO;
      /* low == card present */
      return !gpio_get_value_cansleep(leopard_mmc_gpio + 2 * module + 1);
}

static int dm355leopard_mmc_get_ro(int module)
{
      if (!gpio_is_valid(leopard_mmc_gpio))
            return -ENXIO;
      /* high == card's write protect switch active */
      return gpio_get_value_cansleep(leopard_mmc_gpio + 2 * module + 0);
}

static struct davinci_mmc_config dm355leopard_mmc_config = {
      .get_cd           = dm355leopard_mmc_get_cd,
      .get_ro           = dm355leopard_mmc_get_ro,
      .wires            = 4,
      .max_freq       = 50000000,
      .caps           = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
};

/* Don't connect anything to J10 unless you're only using USB host
 * mode *and* have to do so with some kind of gender-bender.  If
 * you have proper Mini-B or Mini-A cables (or Mini-A adapters)
 * the ID pin won't need any help.
 */
#ifdef CONFIG_USB_MUSB_PERIPHERAL
#define USB_ID_VALUE    0     /* ID pulled high; *should* float */
#else
#define USB_ID_VALUE    1     /* ID pulled low */
#endif

static struct spi_eeprom at25640a = {
      .byte_len   = SZ_64K / 8,
      .name       = "at25640a",
      .page_size  = 32,
      .flags            = EE_ADDR2,
};

static struct spi_board_info dm355_leopard_spi_info[] __initconst = {
      {
            .modalias   = "at25",
            .platform_data    = &at25640a,
            .max_speed_hz     = 10 * 1000 * 1000,     /* at 3v3 */
            .bus_num    = 0,
            .chip_select      = 0,
            .mode       = SPI_MODE_0,
      },
};

static __init void dm355_leopard_init(void)
{
      struct clk *aemif;

      gpio_request(9, "dm9000");
      gpio_direction_input(9);
      dm355leopard_dm9000_rsrc[2].start = gpio_to_irq(9);

      aemif = clk_get(&dm355leopard_dm9000.dev, "aemif");
      if (IS_ERR(aemif))
            WARN("%s: unable to get AEMIF clock\n", __func__);
      else
            clk_enable(aemif);

      platform_add_devices(davinci_leopard_devices,
                       ARRAY_SIZE(davinci_leopard_devices));
      leopard_init_i2c();
      davinci_serial_init(&uart_config);

      /* NOTE:  NAND flash timings set by the UBL are slower than
       * needed by MT29F16G08FAA chips ... EMIF.A1CR is 0x40400204
       * but could be 0x0400008c for about 25% faster page reads.
       */

      gpio_request(2, "usb_id_toggle");
      gpio_direction_output(2, USB_ID_VALUE);
      /* irlml6401 switches over 1A in under 8 msec */
      davinci_setup_usb(1000, 8);

      davinci_setup_mmc(0, &dm355leopard_mmc_config);
      davinci_setup_mmc(1, &dm355leopard_mmc_config);

      dm355_init_spi0(BIT(0), dm355_leopard_spi_info,
                  ARRAY_SIZE(dm355_leopard_spi_info));
}

MACHINE_START(DM355_LEOPARD, "DaVinci DM355 leopard")
      .boot_params  = (0x80000100),
      .map_io           = dm355_leopard_map_io,
      .init_irq     = davinci_irq_init,
      .timer            = &davinci_timer,
      .init_machine = dm355_leopard_init,
MACHINE_END

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