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/nand.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        .mask_chipsel           = BIT(14),
  76        .parts                  = davinci_nand_partitions,
  77        .nr_parts               = ARRAY_SIZE(davinci_nand_partitions),
  78        .ecc_mode               = NAND_ECC_HW_SYNDROME,
  79        .ecc_bits               = 4,
  80        .bbt_options            = NAND_BBT_USE_FLASH,
  81};
  82
  83static struct resource davinci_nand_resources[] = {
  84        {
  85                .start          = DM355_ASYNC_EMIF_DATA_CE0_BASE,
  86                .end            = DM355_ASYNC_EMIF_DATA_CE0_BASE + SZ_32M - 1,
  87                .flags          = IORESOURCE_MEM,
  88        }, {
  89                .start          = DM355_ASYNC_EMIF_CONTROL_BASE,
  90                .end            = DM355_ASYNC_EMIF_CONTROL_BASE + SZ_4K - 1,
  91                .flags          = IORESOURCE_MEM,
  92        },
  93};
  94
  95static struct platform_device davinci_nand_device = {
  96        .name                   = "davinci_nand",
  97        .id                     = 0,
  98
  99        .num_resources          = ARRAY_SIZE(davinci_nand_resources),
 100        .resource               = davinci_nand_resources,
 101
 102        .dev                    = {
 103                .platform_data  = &davinci_nand_data,
 104        },
 105};
 106
 107static struct davinci_i2c_platform_data i2c_pdata = {
 108        .bus_freq       = 400   /* kHz */,
 109        .bus_delay      = 0     /* usec */,
 110};
 111
 112static int leopard_mmc_gpio = -EINVAL;
 113
 114static void dm355leopard_mmcsd_gpios(unsigned gpio)
 115{
 116        gpio_request(gpio + 0, "mmc0_ro");
 117        gpio_request(gpio + 1, "mmc0_cd");
 118        gpio_request(gpio + 2, "mmc1_ro");
 119        gpio_request(gpio + 3, "mmc1_cd");
 120
 121        /* we "know" these are input-only so we don't
 122         * need to call gpio_direction_input()
 123         */
 124
 125        leopard_mmc_gpio = gpio;
 126}
 127
 128static struct i2c_board_info dm355leopard_i2c_info[] = {
 129        { I2C_BOARD_INFO("dm355leopard_msp", 0x25),
 130                .platform_data = dm355leopard_mmcsd_gpios,
 131                /* plus irq */ },
 132        /* { I2C_BOARD_INFO("tlv320aic3x", 0x1b), }, */
 133        /* { I2C_BOARD_INFO("tvp5146", 0x5d), }, */
 134};
 135
 136static void __init leopard_init_i2c(void)
 137{
 138        davinci_init_i2c(&i2c_pdata);
 139
 140        gpio_request(5, "dm355leopard_msp");
 141        gpio_direction_input(5);
 142        dm355leopard_i2c_info[0].irq = gpio_to_irq(5);
 143
 144        i2c_register_board_info(1, dm355leopard_i2c_info,
 145                        ARRAY_SIZE(dm355leopard_i2c_info));
 146}
 147
 148static struct resource dm355leopard_dm9000_rsrc[] = {
 149        {
 150                /* addr */
 151                .start  = 0x04000000,
 152                .end    = 0x04000001,
 153                .flags  = IORESOURCE_MEM,
 154        }, {
 155                /* data */
 156                .start  = 0x04000016,
 157                .end    = 0x04000017,
 158                .flags  = IORESOURCE_MEM,
 159        }, {
 160                .flags  = IORESOURCE_IRQ
 161                        | IORESOURCE_IRQ_HIGHEDGE /* rising (active high) */,
 162        },
 163};
 164
 165static struct platform_device dm355leopard_dm9000 = {
 166        .name           = "dm9000",
 167        .id             = -1,
 168        .resource       = dm355leopard_dm9000_rsrc,
 169        .num_resources  = ARRAY_SIZE(dm355leopard_dm9000_rsrc),
 170};
 171
 172static struct platform_device *davinci_leopard_devices[] __initdata = {
 173        &dm355leopard_dm9000,
 174        &davinci_nand_device,
 175};
 176
 177static void __init dm355_leopard_map_io(void)
 178{
 179        dm355_init();
 180}
 181
 182static int dm355leopard_mmc_get_cd(int module)
 183{
 184        if (!gpio_is_valid(leopard_mmc_gpio))
 185                return -ENXIO;
 186        /* low == card present */
 187        return !gpio_get_value_cansleep(leopard_mmc_gpio + 2 * module + 1);
 188}
 189
 190static int dm355leopard_mmc_get_ro(int module)
 191{
 192        if (!gpio_is_valid(leopard_mmc_gpio))
 193                return -ENXIO;
 194        /* high == card's write protect switch active */
 195        return gpio_get_value_cansleep(leopard_mmc_gpio + 2 * module + 0);
 196}
 197
 198static struct davinci_mmc_config dm355leopard_mmc_config = {
 199        .get_cd         = dm355leopard_mmc_get_cd,
 200        .get_ro         = dm355leopard_mmc_get_ro,
 201        .wires          = 4,
 202        .max_freq       = 50000000,
 203        .caps           = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
 204};
 205
 206/* Don't connect anything to J10 unless you're only using USB host
 207 * mode *and* have to do so with some kind of gender-bender.  If
 208 * you have proper Mini-B or Mini-A cables (or Mini-A adapters)
 209 * the ID pin won't need any help.
 210 */
 211#ifdef CONFIG_USB_MUSB_PERIPHERAL
 212#define USB_ID_VALUE    0       /* ID pulled high; *should* float */
 213#else
 214#define USB_ID_VALUE    1       /* ID pulled low */
 215#endif
 216
 217static struct spi_eeprom at25640a = {
 218        .byte_len       = SZ_64K / 8,
 219        .name           = "at25640a",
 220        .page_size      = 32,
 221        .flags          = EE_ADDR2,
 222};
 223
 224static struct spi_board_info dm355_leopard_spi_info[] __initconst = {
 225        {
 226                .modalias       = "at25",
 227                .platform_data  = &at25640a,
 228                .max_speed_hz   = 10 * 1000 * 1000,     /* at 3v3 */
 229                .bus_num        = 0,
 230                .chip_select    = 0,
 231                .mode           = SPI_MODE_0,
 232        },
 233};
 234
 235static __init void dm355_leopard_init(void)
 236{
 237        struct clk *aemif;
 238        int ret;
 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 (IS_ERR(aemif))
 250                WARN("%s: unable to get AEMIF clock\n", __func__);
 251        else
 252                clk_prepare_enable(aemif);
 253
 254        platform_add_devices(davinci_leopard_devices,
 255                             ARRAY_SIZE(davinci_leopard_devices));
 256        leopard_init_i2c();
 257        davinci_serial_init(dm355_serial_device);
 258
 259        /* NOTE:  NAND flash timings set by the UBL are slower than
 260         * needed by MT29F16G08FAA chips ... EMIF.A1CR is 0x40400204
 261         * but could be 0x0400008c for about 25% faster page reads.
 262         */
 263
 264        gpio_request(2, "usb_id_toggle");
 265        gpio_direction_output(2, USB_ID_VALUE);
 266        /* irlml6401 switches over 1A in under 8 msec */
 267        davinci_setup_usb(1000, 8);
 268
 269        davinci_setup_mmc(0, &dm355leopard_mmc_config);
 270        davinci_setup_mmc(1, &dm355leopard_mmc_config);
 271
 272        dm355_init_spi0(BIT(0), dm355_leopard_spi_info,
 273                        ARRAY_SIZE(dm355_leopard_spi_info));
 274}
 275
 276MACHINE_START(DM355_LEOPARD, "DaVinci DM355 leopard")
 277        .atag_offset  = 0x100,
 278        .map_io       = dm355_leopard_map_io,
 279        .init_irq     = davinci_irq_init,
 280        .init_time      = davinci_timer_init,
 281        .init_machine = dm355_leopard_init,
 282        .init_late      = davinci_init_late,
 283        .dma_zone_size  = SZ_128M,
 284        .restart        = davinci_restart,
 285MACHINE_END
 286
Hosted by Missing Link Electronics. The original LXR software by the LXR community, this experimental version by lxr@linux.no.