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
  23 #include <asm/mach-types.h>
  24 #include <asm/mach/arch.h>
  25
  26 #include <linux/platform_data/i2c-davinci.h>
  27 #include <mach/serial.h>
  28 #include <linux/platform_data/mtd-davinci.h>
  29 #include <linux/platform_data/mmc-davinci.h>
  30 #include <linux/platform_data/usb-davinci.h>
  31
  32 #include "davinci.h"
  33
  34 /* NOTE:  this is geared for the standard config, with a socketed
  35  * 2 GByte Micron NAND (MT29F16G08FAA) using 128KB sectors.  If you
  36  * swap chips, maybe with a different block size, partitioning may
  37  * need to be changed.
  38  */
  39 #define NAND_BLOCK_SIZE         SZ_128K
  40
  41 static struct mtd_partition davinci_nand_partitions[] = {
  42         {
  43                 /* UBL (a few copies) plus U-Boot */
  44                 .name           = "bootloader",
  45                 .offset         = 0,
  46                 .size           = 15 * NAND_BLOCK_SIZE,
  47                 .mask_flags     = MTD_WRITEABLE, /* force read-only */
  48         }, {
  49                 /* U-Boot environment */
  50                 .name           = "params",
  51                 .offset         = MTDPART_OFS_APPEND,
  52                 .size           = 1 * NAND_BLOCK_SIZE,
  53                 .mask_flags     = 0,
  54         }, {
  55                 .name           = "kernel",
  56                 .offset         = MTDPART_OFS_APPEND,
  57                 .size           = SZ_4M,
  58                 .mask_flags     = 0,
  59         }, {
  60                 .name           = "filesystem1",
  61                 .offset         = MTDPART_OFS_APPEND,
  62                 .size           = SZ_512M,
  63                 .mask_flags     = 0,
  64         }, {
  65                 .name           = "filesystem2",
  66                 .offset         = MTDPART_OFS_APPEND,
  67                 .size           = MTDPART_SIZ_FULL,
  68                 .mask_flags     = 0,
  69         }
  70         /* two blocks with bad block table (and mirror) at the end */
  71 };
  72
  73 static struct davinci_nand_pdata davinci_nand_data = {
  74         .mask_chipsel           = BIT(14),
  75         .parts                  = davinci_nand_partitions,
  76         .nr_parts               = ARRAY_SIZE(davinci_nand_partitions),
  77         .ecc_mode               = NAND_ECC_HW_SYNDROME,
  78         .ecc_bits               = 4,
  79         .bbt_options            = NAND_BBT_USE_FLASH,
  80 };
  81
  82 static struct resource davinci_nand_resources[] = {
  83         {
  84                 .start          = DM355_ASYNC_EMIF_DATA_CE0_BASE,
  85                 .end            = DM355_ASYNC_EMIF_DATA_CE0_BASE + SZ_32M - 1,
  86                 .flags          = IORESOURCE_MEM,
  87         }, {
  88                 .start          = DM355_ASYNC_EMIF_CONTROL_BASE,
  89                 .end            = DM355_ASYNC_EMIF_CONTROL_BASE + SZ_4K - 1,
  90                 .flags          = IORESOURCE_MEM,
  91         },
  92 };
  93
  94 static struct platform_device davinci_nand_device = {
  95         .name                   = "davinci_nand",
  96         .id                     = 0,
  97
  98         .num_resources          = ARRAY_SIZE(davinci_nand_resources),
  99         .resource               = davinci_nand_resources,
 100
 101         .dev                    = {
 102                 .platform_data  = &davinci_nand_data,
 103         },
 104 };
 105
 106 static struct davinci_i2c_platform_data i2c_pdata = {
 107         .bus_freq       = 400   /* kHz */,
 108         .bus_delay      = 0     /* usec */,
 109 };
 110
 111 static int leopard_mmc_gpio = -EINVAL;
 112
 113 static void dm355leopard_mmcsd_gpios(unsigned gpio)
 114 {
 115         gpio_request(gpio + 0, "mmc0_ro");
 116         gpio_request(gpio + 1, "mmc0_cd");
 117         gpio_request(gpio + 2, "mmc1_ro");
 118         gpio_request(gpio + 3, "mmc1_cd");
 119
 120         /* we "know" these are input-only so we don't
 121          * need to call gpio_direction_input()
 122          */
 123
 124         leopard_mmc_gpio = gpio;
 125 }
 126
 127 static struct i2c_board_info dm355leopard_i2c_info[] = {
 128         { I2C_BOARD_INFO("dm355leopard_msp", 0x25),
 129                 .platform_data = dm355leopard_mmcsd_gpios,
 130                 /* plus irq */ },
 131         /* { I2C_BOARD_INFO("tlv320aic3x", 0x1b), }, */
 132         /* { I2C_BOARD_INFO("tvp5146", 0x5d), }, */
 133 };
 134
 135 static void __init leopard_init_i2c(void)
 136 {
 137         davinci_init_i2c(&i2c_pdata);
 138
 139         gpio_request(5, "dm355leopard_msp");
 140         gpio_direction_input(5);
 141         dm355leopard_i2c_info[0].irq = gpio_to_irq(5);
 142
 143         i2c_register_board_info(1, dm355leopard_i2c_info,
 144                         ARRAY_SIZE(dm355leopard_i2c_info));
 145 }
 146
 147 static struct resource dm355leopard_dm9000_rsrc[] = {
 148         {
 149                 /* addr */
 150                 .start  = 0x04000000,
 151                 .end    = 0x04000001,
 152                 .flags  = IORESOURCE_MEM,
 153         }, {
 154                 /* data */
 155                 .start  = 0x04000016,
 156                 .end    = 0x04000017,
 157                 .flags  = IORESOURCE_MEM,
 158         }, {
 159                 .flags  = IORESOURCE_IRQ
 160                         | IORESOURCE_IRQ_HIGHEDGE /* rising (active high) */,
 161         },
 162 };
 163
 164 static struct platform_device dm355leopard_dm9000 = {
 165         .name           = "dm9000",
 166         .id             = -1,
 167         .resource       = dm355leopard_dm9000_rsrc,
 168         .num_resources  = ARRAY_SIZE(dm355leopard_dm9000_rsrc),
 169 };
 170
 171 static struct platform_device *davinci_leopard_devices[] __initdata = {
 172         &dm355leopard_dm9000,
 173         &davinci_nand_device,
 174 };
 175
 176 static void __init dm355_leopard_map_io(void)
 177 {
 178         dm355_init();
 179 }
 180
 181 static int dm355leopard_mmc_get_cd(int module)
 182 {
 183         if (!gpio_is_valid(leopard_mmc_gpio))
 184                 return -ENXIO;
 185         /* low == card present */
 186         return !gpio_get_value_cansleep(leopard_mmc_gpio + 2 * module + 1);
 187 }
 188
 189 static int dm355leopard_mmc_get_ro(int module)
 190 {
 191         if (!gpio_is_valid(leopard_mmc_gpio))
 192                 return -ENXIO;
 193         /* high == card's write protect switch active */
 194         return gpio_get_value_cansleep(leopard_mmc_gpio + 2 * module + 0);
 195 }
 196
 197 static struct davinci_mmc_config dm355leopard_mmc_config = {
 198         .get_cd         = dm355leopard_mmc_get_cd,
 199         .get_ro         = dm355leopard_mmc_get_ro,
 200         .wires          = 4,
 201         .max_freq       = 50000000,
 202         .caps           = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
 203 };
 204
 205 /* Don't connect anything to J10 unless you're only using USB host
 206  * mode *and* have to do so with some kind of gender-bender.  If
 207  * you have proper Mini-B or Mini-A cables (or Mini-A adapters)
 208  * the ID pin won't need any help.
 209  */
 210 #ifdef CONFIG_USB_MUSB_PERIPHERAL
 211 #define USB_ID_VALUE    0       /* ID pulled high; *should* float */
 212 #else
 213 #define USB_ID_VALUE    1       /* ID pulled low */
 214 #endif
 215
 216 static struct spi_eeprom at25640a = {
 217         .byte_len       = SZ_64K / 8,
 218         .name           = "at25640a",
 219         .page_size      = 32,
 220         .flags          = EE_ADDR2,
 221 };
 222
 223 static struct spi_board_info dm355_leopard_spi_info[] __initconst = {
 224         {
 225                 .modalias       = "at25",
 226                 .platform_data  = &at25640a,
 227                 .max_speed_hz   = 10 * 1000 * 1000,     /* at 3v3 */
 228                 .bus_num        = 0,
 229                 .chip_select    = 0,
 230                 .mode           = SPI_MODE_0,
 231         },
 232 };
 233
 234 static __init void dm355_leopard_init(void)
 235 {
 236         struct clk *aemif;
 237
 238         gpio_request(9, "dm9000");
 239         gpio_direction_input(9);
 240         dm355leopard_dm9000_rsrc[2].start = gpio_to_irq(9);
 241
 242         aemif = clk_get(&dm355leopard_dm9000.dev, "aemif");
 243         if (IS_ERR(aemif))
 244                 WARN("%s: unable to get AEMIF clock\n", __func__);
 245         else
 246                 clk_prepare_enable(aemif);
 247
 248         platform_add_devices(davinci_leopard_devices,
 249                              ARRAY_SIZE(davinci_leopard_devices));
 250         leopard_init_i2c();
 251         davinci_serial_init(dm355_serial_device);
 252
 253         /* NOTE:  NAND flash timings set by the UBL are slower than
 254          * needed by MT29F16G08FAA chips ... EMIF.A1CR is 0x40400204
 255          * but could be 0x0400008c for about 25% faster page reads.
 256          */
 257
 258         gpio_request(2, "usb_id_toggle");
 259         gpio_direction_output(2, USB_ID_VALUE);
 260         /* irlml6401 switches over 1A in under 8 msec */
 261         davinci_setup_usb(1000, 8);
 262
 263         davinci_setup_mmc(0, &dm355leopard_mmc_config);
 264         davinci_setup_mmc(1, &dm355leopard_mmc_config);
 265
 266         dm355_init_spi0(BIT(0), dm355_leopard_spi_info,
 267                         ARRAY_SIZE(dm355_leopard_spi_info));
 268 }
 269
 270 MACHINE_START(DM355_LEOPARD, "DaVinci DM355 leopard")
 271         .atag_offset  = 0x100,
 272         .map_io       = dm355_leopard_map_io,
 273         .init_irq     = davinci_irq_init,
 274         .init_time      = davinci_timer_init,
 275         .init_machine = dm355_leopard_init,
 276         .init_late      = davinci_init_late,
 277         .dma_zone_size  = SZ_128M,
 278         .restart        = davinci_restart,
 279 MACHINE_END