linux/arch/arm/mach-davinci/board-dm355-leopard.c
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   1/*
   2 * DM355 leopard board support
   3 *
   4 * Based on board-dm355-evm.c
   5 *
   6 * This file is licensed under the terms of the GNU General Public
   7 * License version 2. This program is licensed "as is" without any
   8 * warranty of any kind, whether express or implied.
   9 */
  10#include <linux/kernel.h>
  11#include <linux/init.h>
  12#include <linux/err.h>
  13#include <linux/platform_device.h>
  14#include <linux/mtd/mtd.h>
  15#include <linux/mtd/partitions.h>
  16#include <linux/mtd/rawnand.h>
  17#include <linux/i2c.h>
  18#include <linux/gpio.h>
  19#include <linux/clk.h>
  20#include <linux/spi/spi.h>
  21#include <linux/spi/eeprom.h>
  22#include <linux/platform_data/i2c-davinci.h>
  23#include <linux/platform_data/mmc-davinci.h>
  24#include <linux/platform_data/mtd-davinci.h>
  25#include <linux/platform_data/usb-davinci.h>
  26
  27#include <asm/mach-types.h>
  28#include <asm/mach/arch.h>
  29
  30#include <mach/common.h>
  31#include <mach/serial.h>
  32
  33#include "davinci.h"
  34
  35/* NOTE:  this is geared for the standard config, with a socketed
  36 * 2 GByte Micron NAND (MT29F16G08FAA) using 128KB sectors.  If you
  37 * swap chips, maybe with a different block size, partitioning may
  38 * need to be changed.
  39 */
  40#define NAND_BLOCK_SIZE         SZ_128K
  41
  42static struct mtd_partition davinci_nand_partitions[] = {
  43        {
  44                /* UBL (a few copies) plus U-Boot */
  45                .name           = "bootloader",
  46                .offset         = 0,
  47                .size           = 15 * NAND_BLOCK_SIZE,
  48                .mask_flags     = MTD_WRITEABLE, /* force read-only */
  49        }, {
  50                /* U-Boot environment */
  51                .name           = "params",
  52                .offset         = MTDPART_OFS_APPEND,
  53                .size           = 1 * NAND_BLOCK_SIZE,
  54                .mask_flags     = 0,
  55        }, {
  56                .name           = "kernel",
  57                .offset         = MTDPART_OFS_APPEND,
  58                .size           = SZ_4M,
  59                .mask_flags     = 0,
  60        }, {
  61                .name           = "filesystem1",
  62                .offset         = MTDPART_OFS_APPEND,
  63                .size           = SZ_512M,
  64                .mask_flags     = 0,
  65        }, {
  66                .name           = "filesystem2",
  67                .offset         = MTDPART_OFS_APPEND,
  68                .size           = MTDPART_SIZ_FULL,
  69                .mask_flags     = 0,
  70        }
  71        /* two blocks with bad block table (and mirror) at the end */
  72};
  73
  74static struct davinci_nand_pdata davinci_nand_data = {
  75        .core_chipsel           = 0,
  76        .mask_chipsel           = BIT(14),
  77        .parts                  = davinci_nand_partitions,
  78        .nr_parts               = ARRAY_SIZE(davinci_nand_partitions),
  79        .engine_type            = NAND_ECC_ENGINE_TYPE_ON_HOST,
  80        .ecc_placement          = NAND_ECC_PLACEMENT_INTERLEAVED,
  81        .ecc_bits               = 4,
  82        .bbt_options            = NAND_BBT_USE_FLASH,
  83};
  84
  85static struct resource davinci_nand_resources[] = {
  86        {
  87                .start          = DM355_ASYNC_EMIF_DATA_CE0_BASE,
  88                .end            = DM355_ASYNC_EMIF_DATA_CE0_BASE + SZ_32M - 1,
  89                .flags          = IORESOURCE_MEM,
  90        }, {
  91                .start          = DM355_ASYNC_EMIF_CONTROL_BASE,
  92                .end            = DM355_ASYNC_EMIF_CONTROL_BASE + SZ_4K - 1,
  93                .flags          = IORESOURCE_MEM,
  94        },
  95};
  96
  97static struct platform_device davinci_nand_device = {
  98        .name                   = "davinci_nand",
  99        .id                     = 0,
 100
 101        .num_resources          = ARRAY_SIZE(davinci_nand_resources),
 102        .resource               = davinci_nand_resources,
 103
 104        .dev                    = {
 105                .platform_data  = &davinci_nand_data,
 106        },
 107};
 108
 109static struct davinci_i2c_platform_data i2c_pdata = {
 110        .bus_freq       = 400   /* kHz */,
 111        .bus_delay      = 0     /* usec */,
 112};
 113
 114static int leopard_mmc_gpio = -EINVAL;
 115
 116static void dm355leopard_mmcsd_gpios(unsigned gpio)
 117{
 118        gpio_request(gpio + 0, "mmc0_ro");
 119        gpio_request(gpio + 1, "mmc0_cd");
 120        gpio_request(gpio + 2, "mmc1_ro");
 121        gpio_request(gpio + 3, "mmc1_cd");
 122
 123        /* we "know" these are input-only so we don't
 124         * need to call gpio_direction_input()
 125         */
 126
 127        leopard_mmc_gpio = gpio;
 128}
 129
 130static struct i2c_board_info dm355leopard_i2c_info[] = {
 131        { I2C_BOARD_INFO("dm355leopard_msp", 0x25),
 132                .platform_data = dm355leopard_mmcsd_gpios,
 133                /* plus irq */ },
 134        /* { I2C_BOARD_INFO("tlv320aic3x", 0x1b), }, */
 135        /* { I2C_BOARD_INFO("tvp5146", 0x5d), }, */
 136};
 137
 138static void __init leopard_init_i2c(void)
 139{
 140        davinci_init_i2c(&i2c_pdata);
 141
 142        gpio_request(5, "dm355leopard_msp");
 143        gpio_direction_input(5);
 144        dm355leopard_i2c_info[0].irq = gpio_to_irq(5);
 145
 146        i2c_register_board_info(1, dm355leopard_i2c_info,
 147                        ARRAY_SIZE(dm355leopard_i2c_info));
 148}
 149
 150static struct resource dm355leopard_dm9000_rsrc[] = {
 151        {
 152                /* addr */
 153                .start  = 0x04000000,
 154                .end    = 0x04000001,
 155                .flags  = IORESOURCE_MEM,
 156        }, {
 157                /* data */
 158                .start  = 0x04000016,
 159                .end    = 0x04000017,
 160                .flags  = IORESOURCE_MEM,
 161        }, {
 162                .flags  = IORESOURCE_IRQ
 163                        | IORESOURCE_IRQ_HIGHEDGE /* rising (active high) */,
 164        },
 165};
 166
 167static struct platform_device dm355leopard_dm9000 = {
 168        .name           = "dm9000",
 169        .id             = -1,
 170        .resource       = dm355leopard_dm9000_rsrc,
 171        .num_resources  = ARRAY_SIZE(dm355leopard_dm9000_rsrc),
 172};
 173
 174static struct platform_device *davinci_leopard_devices[] __initdata = {
 175        &dm355leopard_dm9000,
 176        &davinci_nand_device,
 177};
 178
 179static void __init dm355_leopard_map_io(void)
 180{
 181        dm355_init();
 182}
 183
 184static int dm355leopard_mmc_get_cd(int module)
 185{
 186        if (!gpio_is_valid(leopard_mmc_gpio))
 187                return -ENXIO;
 188        /* low == card present */
 189        return !gpio_get_value_cansleep(leopard_mmc_gpio + 2 * module + 1);
 190}
 191
 192static int dm355leopard_mmc_get_ro(int module)
 193{
 194        if (!gpio_is_valid(leopard_mmc_gpio))
 195                return -ENXIO;
 196        /* high == card's write protect switch active */
 197        return gpio_get_value_cansleep(leopard_mmc_gpio + 2 * module + 0);
 198}
 199
 200static struct davinci_mmc_config dm355leopard_mmc_config = {
 201        .get_cd         = dm355leopard_mmc_get_cd,
 202        .get_ro         = dm355leopard_mmc_get_ro,
 203        .wires          = 4,
 204        .max_freq       = 50000000,
 205        .caps           = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
 206};
 207
 208/* Don't connect anything to J10 unless you're only using USB host
 209 * mode *and* have to do so with some kind of gender-bender.  If
 210 * you have proper Mini-B or Mini-A cables (or Mini-A adapters)
 211 * the ID pin won't need any help.
 212 */
 213#define USB_ID_VALUE    1       /* ID pulled low */
 214
 215static struct spi_eeprom at25640a = {
 216        .byte_len       = SZ_64K / 8,
 217        .name           = "at25640a",
 218        .page_size      = 32,
 219        .flags          = EE_ADDR2,
 220};
 221
 222static const struct spi_board_info dm355_leopard_spi_info[] __initconst = {
 223        {
 224                .modalias       = "at25",
 225                .platform_data  = &at25640a,
 226                .max_speed_hz   = 10 * 1000 * 1000,     /* at 3v3 */
 227                .bus_num        = 0,
 228                .chip_select    = 0,
 229                .mode           = SPI_MODE_0,
 230        },
 231};
 232
 233static __init void dm355_leopard_init(void)
 234{
 235        struct clk *aemif;
 236        int ret;
 237
 238        dm355_register_clocks();
 239
 240        ret = dm355_gpio_register();
 241        if (ret)
 242                pr_warn("%s: GPIO init failed: %d\n", __func__, ret);
 243
 244        gpio_request(9, "dm9000");
 245        gpio_direction_input(9);
 246        dm355leopard_dm9000_rsrc[2].start = gpio_to_irq(9);
 247
 248        aemif = clk_get(&dm355leopard_dm9000.dev, "aemif");
 249        if (!WARN(IS_ERR(aemif), "unable to get AEMIF clock\n"))
 250                clk_prepare_enable(aemif);
 251
 252        platform_add_devices(davinci_leopard_devices,
 253                             ARRAY_SIZE(davinci_leopard_devices));
 254        leopard_init_i2c();
 255        davinci_serial_init(dm355_serial_device);
 256
 257        /* NOTE:  NAND flash timings set by the UBL are slower than
 258         * needed by MT29F16G08FAA chips ... EMIF.A1CR is 0x40400204
 259         * but could be 0x0400008c for about 25% faster page reads.
 260         */
 261
 262        gpio_request(2, "usb_id_toggle");
 263        gpio_direction_output(2, USB_ID_VALUE);
 264        /* irlml6401 switches over 1A in under 8 msec */
 265        davinci_setup_usb(1000, 8);
 266
 267        davinci_setup_mmc(0, &dm355leopard_mmc_config);
 268        davinci_setup_mmc(1, &dm355leopard_mmc_config);
 269
 270        dm355_init_spi0(BIT(0), dm355_leopard_spi_info,
 271                        ARRAY_SIZE(dm355_leopard_spi_info));
 272}
 273
 274MACHINE_START(DM355_LEOPARD, "DaVinci DM355 leopard")
 275        .atag_offset  = 0x100,
 276        .map_io       = dm355_leopard_map_io,
 277        .init_irq     = dm355_init_irq,
 278        .init_time      = dm355_init_time,
 279        .init_machine = dm355_leopard_init,
 280        .init_late      = davinci_init_late,
 281        .dma_zone_size  = SZ_128M,
 282MACHINE_END
 283
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