release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-davinci/board-tnetv107x-evm.c

   1 /*
   2  * Texas Instruments TNETV107X EVM Board Support
   3  *
   4  * Copyright (C) 2010 Texas Instruments
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation version 2.
   9  *
  10  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
  11  * kind, whether express or implied; without even the implied warranty
  12  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15 #include <linux/kernel.h>
  16 #include <linux/init.h>
  17 #include <linux/console.h>
  18 #include <linux/dma-mapping.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/gpio.h>
  21 #include <linux/delay.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/ratelimit.h>
  24 #include <linux/mtd/mtd.h>
  25 #include <linux/mtd/partitions.h>
  26 #include <asm/mach/arch.h>
  27 #include <asm/mach-types.h>
  28
  29 #include <mach/irqs.h>
  30 #include <mach/edma.h>
  31 #include <mach/mux.h>
  32 #include <mach/cp_intc.h>
  33 #include <mach/tnetv107x.h>
  34
  35 #define EVM_MMC_WP_GPIO         21
  36 #define EVM_MMC_CD_GPIO         24
  37
  38 static int initialize_gpio(int gpio, char *desc)
  39 {
  40         int ret;
  41
  42         ret = gpio_request(gpio, desc);
  43         if (ret < 0) {
  44                 pr_err_ratelimited("cannot open %s gpio\n", desc);
  45                 return -ENOSYS;
  46         }
  47         gpio_direction_input(gpio);
  48         return gpio;
  49 }
  50
  51 static int mmc_get_cd(int index)
  52 {
  53         static int gpio;
  54
  55         if (!gpio)
  56                 gpio = initialize_gpio(EVM_MMC_CD_GPIO, "mmc card detect");
  57
  58         if (gpio < 0)
  59                 return gpio;
  60
  61         return gpio_get_value(gpio) ? 0 : 1;
  62 }
  63
  64 static int mmc_get_ro(int index)
  65 {
  66         static int gpio;
  67
  68         if (!gpio)
  69                 gpio = initialize_gpio(EVM_MMC_WP_GPIO, "mmc write protect");
  70
  71         if (gpio < 0)
  72                 return gpio;
  73
  74         return gpio_get_value(gpio) ? 1 : 0;
  75 }
  76
  77 static struct davinci_mmc_config mmc_config = {
  78         .get_cd         = mmc_get_cd,
  79         .get_ro         = mmc_get_ro,
  80         .wires          = 4,
  81         .max_freq       = 50000000,
  82         .caps           = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
  83         .version        = MMC_CTLR_VERSION_1,
  84 };
  85
  86 static const short sdio1_pins[] __initdata = {
  87         TNETV107X_SDIO1_CLK_1,          TNETV107X_SDIO1_CMD_1,
  88         TNETV107X_SDIO1_DATA0_1,        TNETV107X_SDIO1_DATA1_1,
  89         TNETV107X_SDIO1_DATA2_1,        TNETV107X_SDIO1_DATA3_1,
  90         TNETV107X_GPIO21,               TNETV107X_GPIO24,
  91         -1
  92 };
  93
  94 static const short uart1_pins[] __initdata = {
  95         TNETV107X_UART1_RD,             TNETV107X_UART1_TD,
  96         -1
  97 };
  98
  99 static struct mtd_partition nand_partitions[] = {
 100         /* bootloader (U-Boot, etc) in first 12 sectors */
 101         {
 102                 .name           = "bootloader",
 103                 .offset         = 0,
 104                 .size           = (12*SZ_128K),
 105                 .mask_flags     = MTD_WRITEABLE,        /* force read-only */
 106         },
 107         /* bootloader params in the next sector */
 108         {
 109                 .name           = "params",
 110                 .offset         = MTDPART_OFS_NXTBLK,
 111                 .size           = SZ_128K,
 112                 .mask_flags     = MTD_WRITEABLE,        /* force read-only */
 113         },
 114         /* kernel */
 115         {
 116                 .name           = "kernel",
 117                 .offset         = MTDPART_OFS_NXTBLK,
 118                 .size           = SZ_4M,
 119                 .mask_flags     = 0,
 120         },
 121         /* file system */
 122         {
 123                 .name           = "filesystem",
 124                 .offset         = MTDPART_OFS_NXTBLK,
 125                 .size           = MTDPART_SIZ_FULL,
 126                 .mask_flags     = 0,
 127         }
 128 };
 129
 130 static struct davinci_nand_pdata nand_config = {
 131         .mask_cle       = 0x4000,
 132         .mask_ale       = 0x2000,
 133         .parts          = nand_partitions,
 134         .nr_parts       = ARRAY_SIZE(nand_partitions),
 135         .ecc_mode       = NAND_ECC_HW,
 136         .options        = NAND_USE_FLASH_BBT,
 137         .ecc_bits       = 1,
 138 };
 139
 140 static struct davinci_uart_config serial_config __initconst = {
 141         .enabled_uarts  = BIT(1),
 142 };
 143
 144 static struct tnetv107x_device_info evm_device_info __initconst = {
 145         .serial_config          = &serial_config,
 146         .mmc_config[1]          = &mmc_config,  /* controller 1 */
 147         .nand_config[0]         = &nand_config, /* chip select 0 */
 148 };
 149
 150 static __init void tnetv107x_evm_board_init(void)
 151 {
 152         davinci_cfg_reg_list(sdio1_pins);
 153         davinci_cfg_reg_list(uart1_pins);
 154
 155         tnetv107x_devices_init(&evm_device_info);
 156 }
 157
 158 #ifdef CONFIG_SERIAL_8250_CONSOLE
 159 static int __init tnetv107x_evm_console_init(void)
 160 {
 161         return add_preferred_console("ttyS", 0, "115200");
 162 }
 163 console_initcall(tnetv107x_evm_console_init);
 164 #endif
 165
 166 MACHINE_START(TNETV107X, "TNETV107X EVM")
 167         .phys_io        = TNETV107X_IO_BASE,
 168         .io_pg_offst    = (TNETV107X_IO_VIRT >> 18) & 0xfffc,
 169         .boot_params    = (TNETV107X_DDR_BASE + 0x100),
 170         .map_io         = tnetv107x_init,
 171         .init_irq       = cp_intc_init,
 172         .timer          = &davinci_timer,
 173         .init_machine   = tnetv107x_evm_board_init,
 174 MACHINE_END