arch/arm/mach-omap1/board-sx1-mmc.c

   1 /*
   2  * linux/arch/arm/mach-omap1/board-sx1-mmc.c
   3  *
   4  * Copyright (C) 2007 Instituto Nokia de Tecnologia - INdT
   5  * Author: Carlos Eduardo Aguiar <carlos.aguiar@indt.org.br>
   6  *
   7  * This code is based on linux/arch/arm/mach-omap1/board-h2-mmc.c, which is:
   8  * Copyright (C) 2007 Instituto Nokia de Tecnologia - INdT
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  */
  14
  15 #include <mach/hardware.h>
  16 #include <mach/mmc.h>
  17 #include <mach/gpio.h>
  18
  19 #ifdef CONFIG_MMC_OMAP
  20 static int slot_cover_open;
  21 static struct device *mmc_device;
  22
  23 static int sx1_mmc_set_power(struct device *dev, int slot, int power_on,
  24                                 int vdd)
  25 {
  26         int err;
  27         u8 dat = 0;
  28
  29 #ifdef CONFIG_MMC_DEBUG
  30         dev_dbg(dev, "Set slot %d power: %s (vdd %d)\n", slot + 1,
  31                 power_on ? "on" : "off", vdd);
  32 #endif
  33
  34         if (slot != 0) {
  35                 dev_err(dev, "No such slot %d\n", slot + 1);
  36                 return -ENODEV;
  37         }
  38
  39         err = sx1_i2c_read_byte(SOFIA_I2C_ADDR, SOFIA_POWER1_REG, &dat);
  40         if (err < 0)
  41                 return err;
  42
  43         if (power_on)
  44                 dat |= SOFIA_MMC_POWER;
  45         else
  46                 dat &= ~SOFIA_MMC_POWER;
  47
  48         return sx1_i2c_write_byte(SOFIA_I2C_ADDR, SOFIA_POWER1_REG, dat);
  49 }
  50
  51 static int sx1_mmc_set_bus_mode(struct device *dev, int slot, int bus_mode)
  52 {
  53 #ifdef CONFIG_MMC_DEBUG
  54         dev_dbg(dev, "Set slot %d bus_mode %s\n", slot + 1,
  55                 bus_mode == MMC_BUSMODE_OPENDRAIN ? "open-drain" : "push-pull");
  56 #endif
  57         if (slot != 0) {
  58                 dev_err(dev, "No such slot %d\n", slot + 1);
  59                 return -ENODEV;
  60         }
  61
  62         return 0;
  63 }
  64
  65 static int sx1_mmc_get_cover_state(struct device *dev, int slot)
  66 {
  67         BUG_ON(slot != 0);
  68
  69         return slot_cover_open;
  70 }
  71
  72 void sx1_mmc_slot_cover_handler(void *arg, int state)
  73 {
  74         if (mmc_device == NULL)
  75                 return;
  76
  77         slot_cover_open = state;
  78         omap_mmc_notify_cover_event(mmc_device, 0, state);
  79 }
  80
  81 static int sx1_mmc_late_init(struct device *dev)
  82 {
  83         int ret = 0;
  84
  85         mmc_device = dev;
  86
  87         return ret;
  88 }
  89
  90 static void sx1_mmc_cleanup(struct device *dev)
  91 {
  92 }
  93
  94 static struct omap_mmc_platform_data sx1_mmc_data = {
  95         .nr_slots                       = 1,
  96         .switch_slot                    = NULL,
  97         .init                           = sx1_mmc_late_init,
  98         .cleanup                        = sx1_mmc_cleanup,
  99         .slots[0]       = {
 100                 .set_power              = sx1_mmc_set_power,
 101                 .set_bus_mode           = sx1_mmc_set_bus_mode,
 102                 .get_ro                 = NULL,
 103                 .get_cover_state        = sx1_mmc_get_cover_state,
 104                 .ocr_mask               = MMC_VDD_28_29 | MMC_VDD_30_31 |
 105                                           MMC_VDD_32_33 | MMC_VDD_33_34,
 106                 .name                   = "mmcblk",
 107         },
 108 };
 109
 110 void __init sx1_mmc_init(void)
 111 {
 112         omap_set_mmc_info(1, &sx1_mmc_data);
 113 }
 114
 115 #else
 116
 117 void __init sx1_mmc_init(void)
 118 {
 119 }
 120
 121 void sx1_mmc_slot_cover_handler(void *arg, int state)
 122 {
 123 }
 124 #endif