arch/arm/mach-ux500/board-mop500-sdi.c

   1 /*
   2  * Copyright (C) ST-Ericsson SA 2010
   3  *
   4  * Author: Hanumath Prasad <hanumath.prasad@stericsson.com>
   5  * License terms: GNU General Public License (GPL) version 2
   6  */
   7
   8 #include <linux/kernel.h>
   9 #include <linux/gpio.h>
  10 #include <linux/amba/bus.h>
  11 #include <linux/amba/mmci.h>
  12 #include <linux/mmc/host.h>
  13 #include <linux/platform_device.h>
  14
  15 #include <plat/pincfg.h>
  16 #include <mach/devices.h>
  17 #include <mach/hardware.h>
  18
  19 #include "devices-db8500.h"
  20 #include "pins-db8500.h"
  21 #include "board-mop500.h"
  22
  23 static pin_cfg_t mop500_sdi_pins[] = {
  24         /* SDI0 (MicroSD slot) */
  25         GPIO18_MC0_CMDDIR,
  26         GPIO19_MC0_DAT0DIR,
  27         GPIO20_MC0_DAT2DIR,
  28         GPIO21_MC0_DAT31DIR,
  29         GPIO22_MC0_FBCLK,
  30         GPIO23_MC0_CLK,
  31         GPIO24_MC0_CMD,
  32         GPIO25_MC0_DAT0,
  33         GPIO26_MC0_DAT1,
  34         GPIO27_MC0_DAT2,
  35         GPIO28_MC0_DAT3,
  36
  37         /* SDI4 (on-board eMMC) */
  38         GPIO197_MC4_DAT3,
  39         GPIO198_MC4_DAT2,
  40         GPIO199_MC4_DAT1,
  41         GPIO200_MC4_DAT0,
  42         GPIO201_MC4_CMD,
  43         GPIO202_MC4_FBCLK,
  44         GPIO203_MC4_CLK,
  45         GPIO204_MC4_DAT7,
  46         GPIO205_MC4_DAT6,
  47         GPIO206_MC4_DAT5,
  48         GPIO207_MC4_DAT4,
  49 };
  50
  51 static pin_cfg_t mop500_sdi2_pins[] = {
  52         /* SDI2 (POP eMMC) */
  53         GPIO128_MC2_CLK,
  54         GPIO129_MC2_CMD,
  55         GPIO130_MC2_FBCLK,
  56         GPIO131_MC2_DAT0,
  57         GPIO132_MC2_DAT1,
  58         GPIO133_MC2_DAT2,
  59         GPIO134_MC2_DAT3,
  60         GPIO135_MC2_DAT4,
  61         GPIO136_MC2_DAT5,
  62         GPIO137_MC2_DAT6,
  63         GPIO138_MC2_DAT7,
  64 };
  65
  66 /*
  67  * SDI 0 (MicroSD slot)
  68  */
  69
  70 /* MMCIPOWER bits */
  71 #define MCI_DATA2DIREN          (1 << 2)
  72 #define MCI_CMDDIREN            (1 << 3)
  73 #define MCI_DATA0DIREN          (1 << 4)
  74 #define MCI_DATA31DIREN         (1 << 5)
  75 #define MCI_FBCLKEN             (1 << 7)
  76
  77 static u32 mop500_sdi0_vdd_handler(struct device *dev, unsigned int vdd,
  78                                    unsigned char power_mode)
  79 {
  80         if (power_mode == MMC_POWER_UP)
  81                 gpio_set_value_cansleep(GPIO_SDMMC_EN, 1);
  82         else if (power_mode == MMC_POWER_OFF)
  83                 gpio_set_value_cansleep(GPIO_SDMMC_EN, 0);
  84
  85         return MCI_FBCLKEN | MCI_CMDDIREN | MCI_DATA0DIREN |
  86                MCI_DATA2DIREN | MCI_DATA31DIREN;
  87 }
  88
  89 static struct mmci_platform_data mop500_sdi0_data = {
  90         .vdd_handler    = mop500_sdi0_vdd_handler,
  91         .ocr_mask       = MMC_VDD_29_30,
  92         .f_max          = 100000000,
  93         .capabilities   = MMC_CAP_4_BIT_DATA,
  94         .gpio_cd        = GPIO_SDMMC_CD,
  95         .gpio_wp        = -1,
  96 };
  97
  98 void mop500_sdi_tc35892_init(void)
  99 {
 100         int ret;
 101
 102         ret = gpio_request(GPIO_SDMMC_EN, "SDMMC_EN");
 103         if (!ret)
 104                 ret = gpio_request(GPIO_SDMMC_1V8_3V_SEL,
 105                                    "GPIO_SDMMC_1V8_3V_SEL");
 106         if (ret)
 107                 return;
 108
 109         gpio_direction_output(GPIO_SDMMC_1V8_3V_SEL, 1);
 110         gpio_direction_output(GPIO_SDMMC_EN, 0);
 111
 112         db8500_add_sdi0(&mop500_sdi0_data);
 113 }
 114
 115 /*
 116  * SDI 2 (POP eMMC, not on DB8500ed)
 117  */
 118
 119 static struct mmci_platform_data mop500_sdi2_data = {
 120         .ocr_mask       = MMC_VDD_165_195,
 121         .f_max          = 100000000,
 122         .capabilities   = MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA,
 123         .gpio_cd        = -1,
 124         .gpio_wp        = -1,
 125 };
 126
 127 /*
 128  * SDI 4 (on-board eMMC)
 129  */
 130
 131 static struct mmci_platform_data mop500_sdi4_data = {
 132         .ocr_mask       = MMC_VDD_29_30,
 133         .f_max          = 100000000,
 134         .capabilities   = MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA |
 135                           MMC_CAP_MMC_HIGHSPEED,
 136         .gpio_cd        = -1,
 137         .gpio_wp        = -1,
 138 };
 139
 140 void mop500_sdi_init(void)
 141 {
 142         nmk_config_pins(mop500_sdi_pins, ARRAY_SIZE(mop500_sdi_pins));
 143
 144         if (!cpu_is_u8500ed()) {
 145                 nmk_config_pins(mop500_sdi2_pins, ARRAY_SIZE(mop500_sdi2_pins));
 146                 db8500_add_sdi2(&mop500_sdi2_data);
 147         }
 148
 149         /* On-board eMMC */
 150         db8500_add_sdi4(&mop500_sdi4_data);
 151 }