arch/arm/mach-davinci/board-dm355-leopard.c

   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
  42 static 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
  74 static 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
  83 static 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
  95 static 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
 107 static struct davinci_i2c_platform_data i2c_pdata = {
 108         .bus_freq       = 400   /* kHz */,
 109         .bus_delay      = 0     /* usec */,
 110 };
 111
 112 static int leopard_mmc_gpio = -EINVAL;
 113
 114 static 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
 128 static 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
 136 static 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
 148 static 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
 165 static 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
 172 static struct platform_device *davinci_leopard_devices[] __initdata = {
 173         &dm355leopard_dm9000,
 174         &davinci_nand_device,
 175 };
 176
 177 static void __init dm355_leopard_map_io(void)
 178 {
 179         dm355_init();
 180 }
 181
 182 static 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
 190 static 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
 198 static 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 #define USB_ID_VALUE    1       /* ID pulled low */
 212
 213 static struct spi_eeprom at25640a = {
 214         .byte_len       = SZ_64K / 8,
 215         .name           = "at25640a",
 216         .page_size      = 32,
 217         .flags          = EE_ADDR2,
 218 };
 219
 220 static struct spi_board_info dm355_leopard_spi_info[] __initconst = {
 221         {
 222                 .modalias       = "at25",
 223                 .platform_data  = &at25640a,
 224                 .max_speed_hz   = 10 * 1000 * 1000,     /* at 3v3 */
 225                 .bus_num        = 0,
 226                 .chip_select    = 0,
 227                 .mode           = SPI_MODE_0,
 228         },
 229 };
 230
 231 static __init void dm355_leopard_init(void)
 232 {
 233         struct clk *aemif;
 234         int ret;
 235
 236         ret = dm355_gpio_register();
 237         if (ret)
 238                 pr_warn("%s: GPIO init failed: %d\n", __func__, ret);
 239
 240         gpio_request(9, "dm9000");
 241         gpio_direction_input(9);
 242         dm355leopard_dm9000_rsrc[2].start = gpio_to_irq(9);
 243
 244         aemif = clk_get(&dm355leopard_dm9000.dev, "aemif");
 245         if (IS_ERR(aemif))
 246                 WARN("%s: unable to get AEMIF clock\n", __func__);
 247         else
 248                 clk_prepare_enable(aemif);
 249
 250         platform_add_devices(davinci_leopard_devices,
 251                              ARRAY_SIZE(davinci_leopard_devices));
 252         leopard_init_i2c();
 253         davinci_serial_init(dm355_serial_device);
 254
 255         /* NOTE:  NAND flash timings set by the UBL are slower than
 256          * needed by MT29F16G08FAA chips ... EMIF.A1CR is 0x40400204
 257          * but could be 0x0400008c for about 25% faster page reads.
 258          */
 259
 260         gpio_request(2, "usb_id_toggle");
 261         gpio_direction_output(2, USB_ID_VALUE);
 262         /* irlml6401 switches over 1A in under 8 msec */
 263         davinci_setup_usb(1000, 8);
 264
 265         davinci_setup_mmc(0, &dm355leopard_mmc_config);
 266         davinci_setup_mmc(1, &dm355leopard_mmc_config);
 267
 268         dm355_init_spi0(BIT(0), dm355_leopard_spi_info,
 269                         ARRAY_SIZE(dm355_leopard_spi_info));
 270 }
 271
 272 MACHINE_START(DM355_LEOPARD, "DaVinci DM355 leopard")
 273         .atag_offset  = 0x100,
 274         .map_io       = dm355_leopard_map_io,
 275         .init_irq     = davinci_irq_init,
 276         .init_time      = davinci_timer_init,
 277         .init_machine = dm355_leopard_init,
 278         .init_late      = davinci_init_late,
 279         .dma_zone_size  = SZ_128M,
 280         .restart        = davinci_restart,
 281 MACHINE_END