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

   1 /*
   2  * TI DaVinci EVM board support
   3  *
   4  * Author: Kevin Hilman, Deep Root Systems, LLC
   5  *
   6  * 2007 (c) MontaVista Software, Inc. This file is licensed under
   7  * the terms of the GNU General Public License version 2. This program
   8  * is licensed "as is" without any warranty of any kind, whether express
   9  * or implied.
  10  */
  11 #include <linux/kernel.h>
  12 #include <linux/module.h>
  13 #include <linux/init.h>
  14 #include <linux/dma-mapping.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/mtd/mtd.h>
  17 #include <linux/mtd/partitions.h>
  18 #include <linux/mtd/nand.h>
  19 #include <linux/i2c.h>
  20 #include <linux/io.h>
  21 #include <linux/gpio.h>
  22 #include <linux/clk.h>
  23 #include <linux/spi/spi.h>
  24 #include <linux/spi/eeprom.h>
  25
  26 #include <asm/setup.h>
  27 #include <asm/mach-types.h>
  28 #include <asm/mach/arch.h>
  29 #include <asm/mach/map.h>
  30 #include <asm/mach/flash.h>
  31
  32 #include <mach/hardware.h>
  33 #include <mach/dm355.h>
  34 #include <mach/psc.h>
  35 #include <mach/common.h>
  36 #include <mach/i2c.h>
  37 #include <mach/serial.h>
  38 #include <mach/nand.h>
  39 #include <mach/mmc.h>
  40
  41 #define DAVINCI_ASYNC_EMIF_CONTROL_BASE         0x01e10000
  42 #define DAVINCI_ASYNC_EMIF_DATA_CE0_BASE        0x02000000
  43
  44 /* NOTE:  this is geared for the standard config, with a socketed
  45  * 2 GByte Micron NAND (MT29F16G08FAA) using 128KB sectors.  If you
  46  * swap chips, maybe with a different block size, partitioning may
  47  * need to be changed.
  48  */
  49 #define NAND_BLOCK_SIZE         SZ_128K
  50
  51 static struct mtd_partition davinci_nand_partitions[] = {
  52         {
  53                 /* UBL (a few copies) plus U-Boot */
  54                 .name           = "bootloader",
  55                 .offset         = 0,
  56                 .size           = 15 * NAND_BLOCK_SIZE,
  57                 .mask_flags     = MTD_WRITEABLE, /* force read-only */
  58         }, {
  59                 /* U-Boot environment */
  60                 .name           = "params",
  61                 .offset         = MTDPART_OFS_APPEND,
  62                 .size           = 1 * NAND_BLOCK_SIZE,
  63                 .mask_flags     = 0,
  64         }, {
  65                 .name           = "kernel",
  66                 .offset         = MTDPART_OFS_APPEND,
  67                 .size           = SZ_4M,
  68                 .mask_flags     = 0,
  69         }, {
  70                 .name           = "filesystem1",
  71                 .offset         = MTDPART_OFS_APPEND,
  72                 .size           = SZ_512M,
  73                 .mask_flags     = 0,
  74         }, {
  75                 .name           = "filesystem2",
  76                 .offset         = MTDPART_OFS_APPEND,
  77                 .size           = MTDPART_SIZ_FULL,
  78                 .mask_flags     = 0,
  79         }
  80         /* two blocks with bad block table (and mirror) at the end */
  81 };
  82
  83 static struct davinci_nand_pdata davinci_nand_data = {
  84         .mask_chipsel           = BIT(14),
  85         .parts                  = davinci_nand_partitions,
  86         .nr_parts               = ARRAY_SIZE(davinci_nand_partitions),
  87         .ecc_mode               = NAND_ECC_HW_SYNDROME,
  88         .options                = NAND_USE_FLASH_BBT,
  89 };
  90
  91 static struct resource davinci_nand_resources[] = {
  92         {
  93                 .start          = DAVINCI_ASYNC_EMIF_DATA_CE0_BASE,
  94                 .end            = DAVINCI_ASYNC_EMIF_DATA_CE0_BASE + SZ_32M - 1,
  95                 .flags          = IORESOURCE_MEM,
  96         }, {
  97                 .start          = DAVINCI_ASYNC_EMIF_CONTROL_BASE,
  98                 .end            = DAVINCI_ASYNC_EMIF_CONTROL_BASE + SZ_4K - 1,
  99                 .flags          = IORESOURCE_MEM,
 100         },
 101 };
 102
 103 static struct platform_device davinci_nand_device = {
 104         .name                   = "davinci_nand",
 105         .id                     = 0,
 106
 107         .num_resources          = ARRAY_SIZE(davinci_nand_resources),
 108         .resource               = davinci_nand_resources,
 109
 110         .dev                    = {
 111                 .platform_data  = &davinci_nand_data,
 112         },
 113 };
 114
 115 static struct davinci_i2c_platform_data i2c_pdata = {
 116         .bus_freq       = 400   /* kHz */,
 117         .bus_delay      = 0     /* usec */,
 118 };
 119
 120 static int dm355evm_mmc_gpios = -EINVAL;
 121
 122 static void dm355evm_mmcsd_gpios(unsigned gpio)
 123 {
 124         gpio_request(gpio + 0, "mmc0_ro");
 125         gpio_request(gpio + 1, "mmc0_cd");
 126         gpio_request(gpio + 2, "mmc1_ro");
 127         gpio_request(gpio + 3, "mmc1_cd");
 128
 129         /* we "know" these are input-only so we don't
 130          * need to call gpio_direction_input()
 131          */
 132
 133         dm355evm_mmc_gpios = gpio;
 134 }
 135
 136 static struct i2c_board_info dm355evm_i2c_info[] = {
 137         { I2C_BOARD_INFO("dm355evm_msp", 0x25),
 138                 .platform_data = dm355evm_mmcsd_gpios,
 139                 /* plus irq */ },
 140         /* { I2C_BOARD_INFO("tlv320aic3x", 0x1b), }, */
 141         /* { I2C_BOARD_INFO("tvp5146", 0x5d), }, */
 142 };
 143
 144 static void __init evm_init_i2c(void)
 145 {
 146         davinci_init_i2c(&i2c_pdata);
 147
 148         gpio_request(5, "dm355evm_msp");
 149         gpio_direction_input(5);
 150         dm355evm_i2c_info[0].irq = gpio_to_irq(5);
 151
 152         i2c_register_board_info(1, dm355evm_i2c_info,
 153                         ARRAY_SIZE(dm355evm_i2c_info));
 154 }
 155
 156 static struct resource dm355evm_dm9000_rsrc[] = {
 157         {
 158                 /* addr */
 159                 .start  = 0x04014000,
 160                 .end    = 0x04014001,
 161                 .flags  = IORESOURCE_MEM,
 162         }, {
 163                 /* data */
 164                 .start  = 0x04014002,
 165                 .end    = 0x04014003,
 166                 .flags  = IORESOURCE_MEM,
 167         }, {
 168                 .flags  = IORESOURCE_IRQ
 169                         | IORESOURCE_IRQ_HIGHEDGE /* rising (active high) */,
 170         },
 171 };
 172
 173 static struct platform_device dm355evm_dm9000 = {
 174         .name           = "dm9000",
 175         .id             = -1,
 176         .resource       = dm355evm_dm9000_rsrc,
 177         .num_resources  = ARRAY_SIZE(dm355evm_dm9000_rsrc),
 178 };
 179
 180 static struct platform_device *davinci_evm_devices[] __initdata = {
 181         &dm355evm_dm9000,
 182         &davinci_nand_device,
 183 };
 184
 185 static struct davinci_uart_config uart_config __initdata = {
 186         .enabled_uarts = (1 << 0),
 187 };
 188
 189 static void __init dm355_evm_map_io(void)
 190 {
 191         dm355_init();
 192 }
 193
 194 static int dm355evm_mmc_get_cd(int module)
 195 {
 196         if (!gpio_is_valid(dm355evm_mmc_gpios))
 197                 return -ENXIO;
 198         /* low == card present */
 199         return !gpio_get_value_cansleep(dm355evm_mmc_gpios + 2 * module + 1);
 200 }
 201
 202 static int dm355evm_mmc_get_ro(int module)
 203 {
 204         if (!gpio_is_valid(dm355evm_mmc_gpios))
 205                 return -ENXIO;
 206         /* high == card's write protect switch active */
 207         return gpio_get_value_cansleep(dm355evm_mmc_gpios + 2 * module + 0);
 208 }
 209
 210 static struct davinci_mmc_config dm355evm_mmc_config = {
 211         .get_cd         = dm355evm_mmc_get_cd,
 212         .get_ro         = dm355evm_mmc_get_ro,
 213         .wires          = 4,
 214         .max_freq       = 50000000,
 215         .caps           = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
 216         .version        = MMC_CTLR_VERSION_1,
 217 };
 218
 219 /* Don't connect anything to J10 unless you're only using USB host
 220  * mode *and* have to do so with some kind of gender-bender.  If
 221  * you have proper Mini-B or Mini-A cables (or Mini-A adapters)
 222  * the ID pin won't need any help.
 223  */
 224 #ifdef CONFIG_USB_MUSB_PERIPHERAL
 225 #define USB_ID_VALUE    0       /* ID pulled high; *should* float */
 226 #else
 227 #define USB_ID_VALUE    1       /* ID pulled low */
 228 #endif
 229
 230 static struct spi_eeprom at25640a = {
 231         .byte_len       = SZ_64K / 8,
 232         .name           = "at25640a",
 233         .page_size      = 32,
 234         .flags          = EE_ADDR2,
 235 };
 236
 237 static struct spi_board_info dm355_evm_spi_info[] __initconst = {
 238         {
 239                 .modalias       = "at25",
 240                 .platform_data  = &at25640a,
 241                 .max_speed_hz   = 10 * 1000 * 1000,     /* at 3v3 */
 242                 .bus_num        = 0,
 243                 .chip_select    = 0,
 244                 .mode           = SPI_MODE_0,
 245         },
 246 };
 247
 248 static __init void dm355_evm_init(void)
 249 {
 250         struct clk *aemif;
 251
 252         gpio_request(1, "dm9000");
 253         gpio_direction_input(1);
 254         dm355evm_dm9000_rsrc[2].start = gpio_to_irq(1);
 255
 256         aemif = clk_get(&dm355evm_dm9000.dev, "aemif");
 257         if (IS_ERR(aemif))
 258                 WARN("%s: unable to get AEMIF clock\n", __func__);
 259         else
 260                 clk_enable(aemif);
 261
 262         platform_add_devices(davinci_evm_devices,
 263                              ARRAY_SIZE(davinci_evm_devices));
 264         evm_init_i2c();
 265         davinci_serial_init(&uart_config);
 266
 267         /* NOTE:  NAND flash timings set by the UBL are slower than
 268          * needed by MT29F16G08FAA chips ... EMIF.A1CR is 0x40400204
 269          * but could be 0x0400008c for about 25% faster page reads.
 270          */
 271
 272         gpio_request(2, "usb_id_toggle");
 273         gpio_direction_output(2, USB_ID_VALUE);
 274         /* irlml6401 switches over 1A in under 8 msec */
 275         setup_usb(500, 8);
 276
 277         davinci_setup_mmc(0, &dm355evm_mmc_config);
 278         davinci_setup_mmc(1, &dm355evm_mmc_config);
 279
 280         dm355_init_spi0(BIT(0), dm355_evm_spi_info,
 281                         ARRAY_SIZE(dm355_evm_spi_info));
 282 }
 283
 284 static __init void dm355_evm_irq_init(void)
 285 {
 286         davinci_irq_init();
 287 }
 288
 289 MACHINE_START(DAVINCI_DM355_EVM, "DaVinci DM355 EVM")
 290         .phys_io      = IO_PHYS,
 291         .io_pg_offst  = (__IO_ADDRESS(IO_PHYS) >> 18) & 0xfffc,
 292         .boot_params  = (0x80000100),
 293         .map_io       = dm355_evm_map_io,
 294         .init_irq     = dm355_evm_irq_init,
 295         .timer        = &davinci_timer,
 296         .init_machine = dm355_evm_init,
 297 MACHINE_END