arch/arm/mach-omap2/board-h4-mmc.c

   1 /*
   2  * linux/arch/arm/mach-omap2/board-h4-mmc.c
   3  *
   4  * Copyright (C) 2007 Instituto Nokia de Tecnologia - INdT
   5  * Authors: David Cohen <david.cohen@indt.org.br>
   6  *          Carlos Eduardo Aguiar <carlos.aguiar@indt.org.br>
   7  *
   8  * This code is based on linux/arch/arm/mach-omap2/board-n800-mmc.c, which is:
   9  * Copyright (C) 2006 Nokia Corporation
  10  * Author: Juha Yrjola
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License version 2 as
  14  * published by the Free Software Foundation.
  15  */
  16
  17 #include <mach/mmc.h>
  18
  19 #include <asm/mach-types.h>
  20 #include <linux/delay.h>
  21 #include <linux/i2c/menelaus.h>
  22
  23 #ifdef CONFIG_MMC_OMAP
  24
  25 /* Bit mask for slots detection interrupts */
  26 #define SD1_CD_ST       (1 << 0)
  27 #define SD2_CD_ST       (1 << 1)
  28
  29 static int slot1_cover_open;
  30 static int slot2_cover_open;
  31 static struct device *mmc_device;
  32
  33 /*
  34  * VMMC --> slot 1
  35  * VDCDC3_APE, VMCS2_APE --> slot 2
  36  */
  37
  38 static int h4_mmc_switch_slot(struct device *dev, int slot)
  39 {
  40         int r = 0;
  41
  42 #ifdef CONFIG_MMC_DEBUG
  43         dev_dbg(dev, "Choose slot %d\n", slot + 1);
  44 #endif
  45         if (slot == 0) {
  46                 r = menelaus_enable_slot(2, 0);
  47                 r |= menelaus_enable_slot(1, 1);
  48         } else {
  49                 r = menelaus_enable_slot(1, 0);
  50                 r |= menelaus_enable_slot(2, 1);
  51         }
  52
  53         return r ? -ENODEV : 0;
  54 }
  55
  56 static int h4_mmc_set_power(struct device *dev, int slot, int power_on,
  57                                 int vdd)
  58 {
  59         int mV = 0;
  60
  61 #ifdef CONFIG_MMC_DEBUG
  62         dev_dbg(dev, "Set slot %d power: %s (vdd %d)\n", slot + 1,
  63                 power_on ? "on" : "off", vdd);
  64 #endif
  65         if (slot == 0) {
  66                 if (!power_on)
  67                         return menelaus_set_vmmc(3000);
  68                 switch (1 << vdd) {
  69                         case MMC_VDD_33_34:
  70                         case MMC_VDD_32_33:
  71                         case MMC_VDD_31_32:
  72                                 mV = 3100;
  73                                 break;
  74                         case MMC_VDD_30_31:
  75                                 mV = 3000;
  76                                 break;
  77                         case MMC_VDD_28_29:
  78                                 mV = 2800;
  79                                 break;
  80                         case MMC_VDD_165_195:
  81                                 mV = 1850;
  82                                 break;
  83                         default:
  84                                 BUG();
  85                 }
  86                 return menelaus_set_vmmc(mV);
  87         } else {
  88                 if (!power_on)
  89                         return menelaus_set_vdcdc(3, 3000);
  90                 switch (1 << vdd) {
  91                         case MMC_VDD_33_34:
  92                         case MMC_VDD_32_33:
  93                                 mV = 3300;
  94                                 break;
  95                         case MMC_VDD_30_31:
  96                         case MMC_VDD_29_30:
  97                                 mV = 3000;
  98                                 break;
  99                         case MMC_VDD_28_29:
 100                         case MMC_VDD_27_28:
 101                                 mV = 2800;
 102                                 break;
 103                         case MMC_VDD_24_25:
 104                         case MMC_VDD_23_24:
 105                                 mV = 2400;
 106                                 break;
 107                         case MMC_VDD_22_23:
 108                         case MMC_VDD_21_22:
 109                                 mV = 2200;
 110                                 break;
 111                         case MMC_VDD_20_21:
 112                                 mV = 2000;
 113                                 break;
 114                         case MMC_VDD_165_195:
 115                                 mV = 1800;
 116                                 break;
 117                         default:
 118                                 BUG();
 119                 }
 120                 return menelaus_set_vdcdc(3, mV);
 121         }
 122         return 0;
 123 }
 124
 125 static int h4_mmc_set_bus_mode(struct device *dev, int slot, int bus_mode)
 126 {
 127         int r = 0;
 128
 129 #ifdef CONFIG_MMC_DEBUG
 130         dev_dbg(dev, "Set slot %d bus mode %s\n", slot + 1,
 131                 bus_mode == MMC_BUSMODE_OPENDRAIN ? "open-drain" : "push-pull");
 132 #endif
 133         BUG_ON(slot != 0 && slot != 1);
 134         slot++;
 135         switch (bus_mode) {
 136         case MMC_BUSMODE_OPENDRAIN:
 137                 r = menelaus_set_mmc_opendrain(slot, 1);
 138                 break;
 139         case MMC_BUSMODE_PUSHPULL:
 140                 r = menelaus_set_mmc_opendrain(slot, 0);
 141                 break;
 142         default:
 143                 BUG();
 144         }
 145         if (r != 0 && printk_ratelimit()) {
 146                 dev_err(dev, "MMC: unable to set bus mode for slot %d\n",
 147                         slot);
 148         }
 149         return r;
 150 }
 151
 152 static int h4_mmc_slot1_cover_state(struct device *dev, int slot)
 153 {
 154         BUG_ON(slot != 0);
 155         return slot1_cover_open;
 156 }
 157
 158 static int h4_mmc_slot2_cover_state(struct device *dev, int slot)
 159 {
 160         BUG_ON(slot != 1);
 161         return slot2_cover_open;
 162 }
 163
 164 static void h4_mmc_slot_callback(void *data, u8 card_mask)
 165 {
 166         int cover_open;
 167
 168         cover_open = (card_mask & SD1_CD_ST) ? 0 : 1;
 169         if (cover_open != slot1_cover_open) {
 170                 slot1_cover_open = cover_open;
 171                 omap_mmc_notify_cover_event(mmc_device, 0, slot1_cover_open);
 172         }
 173
 174         cover_open = (card_mask & SD2_CD_ST) ? 0 : 1;
 175         if (cover_open != slot2_cover_open) {
 176                 slot2_cover_open = cover_open;
 177                 omap_mmc_notify_cover_event(mmc_device, 1, slot2_cover_open);
 178         }
 179 }
 180
 181 static int h4_mmc_late_init(struct device *dev)
 182 {
 183         int r;
 184
 185         mmc_device = dev;
 186
 187         r = menelaus_set_mmc_slot(1, 0, 0, 1);
 188         if (r < 0)
 189                 goto out;
 190         r = menelaus_set_mmc_slot(2, 0, 0, 1);
 191         if (r < 0)
 192                 goto out;
 193
 194         r = menelaus_get_slot_pin_states();
 195         if (r < 0)
 196                 goto out;
 197
 198         if (r & SD1_CD_ST)
 199                 slot1_cover_open = 1;
 200         else
 201                 slot1_cover_open = 0;
 202
 203         /* Slot pin bits seem to be inversed until first swith change,
 204          * but just for slot 2
 205          */
 206         if ((r == 0xf) || (r == (0xf & ~SD2_CD_ST)))
 207                 r = ~r;
 208
 209         if (r & SD2_CD_ST)
 210                 slot2_cover_open = 1;
 211         else
 212                 slot2_cover_open = 0;
 213
 214         r = menelaus_register_mmc_callback(h4_mmc_slot_callback, NULL);
 215
 216 out:
 217         return r;
 218 }
 219
 220 static void h4_mmc_cleanup(struct device *dev)
 221 {
 222         menelaus_unregister_mmc_callback();
 223 }
 224
 225 static struct omap_mmc_platform_data h4_mmc_data = {
 226         .nr_slots               = 2,
 227         .switch_slot            = h4_mmc_switch_slot,
 228         .init                   = h4_mmc_late_init,
 229         .cleanup                = h4_mmc_cleanup,
 230         .slots[0] = {
 231                 .set_power      = h4_mmc_set_power,
 232                 .set_bus_mode   = h4_mmc_set_bus_mode,
 233                 .get_ro         = NULL,
 234                 .get_cover_state= h4_mmc_slot1_cover_state,
 235                 .ocr_mask       = MMC_VDD_165_195 |
 236                                   MMC_VDD_28_29 | MMC_VDD_30_31 |
 237                                   MMC_VDD_32_33 | MMC_VDD_33_34,
 238                 .name           = "slot1",
 239         },
 240         .slots[1] = {
 241                 .set_power      = h4_mmc_set_power,
 242                 .set_bus_mode   = h4_mmc_set_bus_mode,
 243                 .get_ro         = NULL,
 244                 .get_cover_state= h4_mmc_slot2_cover_state,
 245                 .ocr_mask       = MMC_VDD_165_195 | MMC_VDD_20_21 |
 246                                   MMC_VDD_21_22 | MMC_VDD_22_23 | MMC_VDD_23_24 |
 247                                   MMC_VDD_24_25 | MMC_VDD_27_28 | MMC_VDD_28_29 |
 248                                   MMC_VDD_29_30 | MMC_VDD_30_31 | MMC_VDD_32_33 |
 249                                   MMC_VDD_33_34,
 250                 .name           = "slot2",
 251         },
 252 };
 253
 254 void __init h4_mmc_init(void)
 255 {
 256         omap_set_mmc_info(1, &h4_mmc_data);
 257 }
 258
 259 #else
 260
 261 void __init h4_mmc_init(void)
 262 {
 263 }
 264
 265 #endif
 266