drivers/mmc/mmc-uclass.c

   1 /*
   2  * Copyright (C) 2015 Google, Inc
   3  * Written by Simon Glass <sjg@chromium.org>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <mmc.h>
  10 #include <dm.h>
  11 #include <dm/device-internal.h>
  12 #include <dm/lists.h>
  13 #include <dm/root.h>
  14 #include "mmc_private.h"
  15
  16 struct mmc *mmc_get_mmc_dev(struct udevice *dev)
  17 {
  18         struct mmc_uclass_priv *upriv;
  19
  20         if (!device_active(dev))
  21                 return NULL;
  22         upriv = dev_get_uclass_priv(dev);
  23         return upriv->mmc;
  24 }
  25
  26 #ifdef CONFIG_BLK
  27 struct mmc *find_mmc_device(int dev_num)
  28 {
  29         struct udevice *dev, *mmc_dev;
  30         int ret;
  31
  32         ret = blk_get_device(IF_TYPE_MMC, dev_num, &dev);
  33
  34         if (ret) {
  35 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
  36                 printf("MMC Device %d not found\n", dev_num);
  37 #endif
  38                 return NULL;
  39         }
  40
  41         mmc_dev = dev_get_parent(dev);
  42
  43         return mmc_get_mmc_dev(mmc_dev);
  44 }
  45
  46 int get_mmc_num(void)
  47 {
  48         return max(blk_find_max_devnum(IF_TYPE_MMC), 0);
  49 }
  50
  51 int mmc_get_next_devnum(void)
  52 {
  53         int ret;
  54
  55         ret = get_mmc_num();
  56         if (ret < 0)
  57                 return ret;
  58
  59         return ret + 1;
  60 }
  61
  62 struct blk_desc *mmc_get_blk_desc(struct mmc *mmc)
  63 {
  64         struct blk_desc *desc;
  65         struct udevice *dev;
  66
  67         device_find_first_child(mmc->dev, &dev);
  68         if (!dev)
  69                 return NULL;
  70         desc = dev_get_uclass_platdata(dev);
  71
  72         return desc;
  73 }
  74
  75 void mmc_do_preinit(void)
  76 {
  77         struct udevice *dev;
  78         struct uclass *uc;
  79         int ret;
  80
  81         ret = uclass_get(UCLASS_MMC, &uc);
  82         if (ret)
  83                 return;
  84         uclass_foreach_dev(dev, uc) {
  85                 struct mmc *m = mmc_get_mmc_dev(dev);
  86
  87                 if (!m)
  88                         continue;
  89 #ifdef CONFIG_FSL_ESDHC_ADAPTER_IDENT
  90                 mmc_set_preinit(m, 1);
  91 #endif
  92                 if (m->preinit)
  93                         mmc_start_init(m);
  94         }
  95 }
  96
  97 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
  98 void print_mmc_devices(char separator)
  99 {
 100         struct udevice *dev;
 101         char *mmc_type;
 102         bool first = true;
 103
 104         for (uclass_first_device(UCLASS_MMC, &dev);
 105              dev;
 106              uclass_next_device(&dev)) {
 107                 struct mmc *m = mmc_get_mmc_dev(dev);
 108
 109                 if (!first) {
 110                         printf("%c", separator);
 111                         if (separator != '\n')
 112                                 puts(" ");
 113                 }
 114                 if (m->has_init)
 115                         mmc_type = IS_SD(m) ? "SD" : "eMMC";
 116                 else
 117                         mmc_type = NULL;
 118
 119                 printf("%s: %d", m->cfg->name, mmc_get_blk_desc(m)->devnum);
 120                 if (mmc_type)
 121                         printf(" (%s)", mmc_type);
 122         }
 123
 124         printf("\n");
 125 }
 126
 127 #else
 128 void print_mmc_devices(char separator) { }
 129 #endif
 130
 131 int mmc_bind(struct udevice *dev, struct mmc *mmc, const struct mmc_config *cfg)
 132 {
 133         struct blk_desc *bdesc;
 134         struct udevice *bdev;
 135         int ret;
 136
 137         ret = blk_create_devicef(dev, "mmc_blk", "blk", IF_TYPE_MMC, -1, 512,
 138                                  0, &bdev);
 139         if (ret) {
 140                 debug("Cannot create block device\n");
 141                 return ret;
 142         }
 143         bdesc = dev_get_uclass_platdata(bdev);
 144         mmc->cfg = cfg;
 145         mmc->priv = dev;
 146
 147         /* the following chunk was from mmc_register() */
 148
 149         /* Setup dsr related values */
 150         mmc->dsr_imp = 0;
 151         mmc->dsr = 0xffffffff;
 152         /* Setup the universal parts of the block interface just once */
 153         bdesc->removable = 1;
 154
 155         /* setup initial part type */
 156         bdesc->part_type = cfg->part_type;
 157         mmc->dev = dev;
 158
 159         return 0;
 160 }
 161
 162 int mmc_unbind(struct udevice *dev)
 163 {
 164         struct udevice *bdev;
 165
 166         device_find_first_child(dev, &bdev);
 167         if (bdev) {
 168                 device_remove(bdev);
 169                 device_unbind(bdev);
 170         }
 171
 172         return 0;
 173 }
 174
 175 static int mmc_select_hwpart(struct udevice *bdev, int hwpart)
 176 {
 177         struct udevice *mmc_dev = dev_get_parent(bdev);
 178         struct mmc *mmc = mmc_get_mmc_dev(mmc_dev);
 179         struct blk_desc *desc = dev_get_uclass_platdata(bdev);
 180         int ret;
 181
 182         if (desc->hwpart == hwpart)
 183                 return 0;
 184
 185         if (mmc->part_config == MMCPART_NOAVAILABLE)
 186                 return -EMEDIUMTYPE;
 187
 188         ret = mmc_switch_part(mmc, hwpart);
 189         if (ret)
 190                 return ret;
 191
 192         return 0;
 193 }
 194
 195 static const struct blk_ops mmc_blk_ops = {
 196         .read   = mmc_bread,
 197 #ifndef CONFIG_SPL_BUILD
 198         .write  = mmc_bwrite,
 199 #endif
 200         .select_hwpart  = mmc_select_hwpart,
 201 };
 202
 203 U_BOOT_DRIVER(mmc_blk) = {
 204         .name           = "mmc_blk",
 205         .id             = UCLASS_BLK,
 206         .ops            = &mmc_blk_ops,
 207 };
 208 #endif /* CONFIG_BLK */
 209
 210 U_BOOT_DRIVER(mmc) = {
 211         .name   = "mmc",
 212         .id     = UCLASS_MMC,
 213 };
 214
 215 UCLASS_DRIVER(mmc) = {
 216         .id             = UCLASS_MMC,
 217         .name           = "mmc",
 218         .flags          = DM_UC_FLAG_SEQ_ALIAS,
 219         .per_device_auto_alloc_size = sizeof(struct mmc_uclass_priv),
 220 };