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 DECLARE_GLOBAL_DATA_PTR;
  17
  18 int dm_mmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
  19                     struct mmc_data *data)
  20 {
  21         struct mmc *mmc = mmc_get_mmc_dev(dev);
  22         struct dm_mmc_ops *ops = mmc_get_ops(dev);
  23         int ret;
  24
  25         mmmc_trace_before_send(mmc, cmd);
  26         if (ops->send_cmd)
  27                 ret = ops->send_cmd(dev, cmd, data);
  28         else
  29                 ret = -ENOSYS;
  30         mmmc_trace_after_send(mmc, cmd, ret);
  31
  32         return ret;
  33 }
  34
  35 int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
  36 {
  37         return dm_mmc_send_cmd(mmc->dev, cmd, data);
  38 }
  39
  40 int dm_mmc_set_ios(struct udevice *dev)
  41 {
  42         struct dm_mmc_ops *ops = mmc_get_ops(dev);
  43
  44         if (!ops->set_ios)
  45                 return -ENOSYS;
  46         return ops->set_ios(dev);
  47 }
  48
  49 int mmc_set_ios(struct mmc *mmc)
  50 {
  51         return dm_mmc_set_ios(mmc->dev);
  52 }
  53
  54 int dm_mmc_get_wp(struct udevice *dev)
  55 {
  56         struct dm_mmc_ops *ops = mmc_get_ops(dev);
  57
  58         if (!ops->get_wp)
  59                 return -ENOSYS;
  60         return ops->get_wp(dev);
  61 }
  62
  63 int mmc_getwp(struct mmc *mmc)
  64 {
  65         return dm_mmc_get_wp(mmc->dev);
  66 }
  67
  68 int dm_mmc_get_cd(struct udevice *dev)
  69 {
  70         struct dm_mmc_ops *ops = mmc_get_ops(dev);
  71
  72         if (!ops->get_cd)
  73                 return -ENOSYS;
  74         return ops->get_cd(dev);
  75 }
  76
  77 int mmc_getcd(struct mmc *mmc)
  78 {
  79         return dm_mmc_get_cd(mmc->dev);
  80 }
  81
  82 struct mmc *mmc_get_mmc_dev(struct udevice *dev)
  83 {
  84         struct mmc_uclass_priv *upriv;
  85
  86         if (!device_active(dev))
  87                 return NULL;
  88         upriv = dev_get_uclass_priv(dev);
  89         return upriv->mmc;
  90 }
  91
  92 #if CONFIG_IS_ENABLED(BLK)
  93 struct mmc *find_mmc_device(int dev_num)
  94 {
  95         struct udevice *dev, *mmc_dev;
  96         int ret;
  97
  98         ret = blk_find_device(IF_TYPE_MMC, dev_num, &dev);
  99
 100         if (ret) {
 101 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
 102                 printf("MMC Device %d not found\n", dev_num);
 103 #endif
 104                 return NULL;
 105         }
 106
 107         mmc_dev = dev_get_parent(dev);
 108
 109         struct mmc *mmc = mmc_get_mmc_dev(mmc_dev);
 110
 111         return mmc;
 112 }
 113
 114 int get_mmc_num(void)
 115 {
 116         return max((blk_find_max_devnum(IF_TYPE_MMC) + 1), 0);
 117 }
 118
 119 int mmc_get_next_devnum(void)
 120 {
 121         return blk_find_max_devnum(IF_TYPE_MMC);
 122 }
 123
 124 struct blk_desc *mmc_get_blk_desc(struct mmc *mmc)
 125 {
 126         struct blk_desc *desc;
 127         struct udevice *dev;
 128
 129         device_find_first_child(mmc->dev, &dev);
 130         if (!dev)
 131                 return NULL;
 132         desc = dev_get_uclass_platdata(dev);
 133
 134         return desc;
 135 }
 136
 137 void mmc_do_preinit(void)
 138 {
 139         struct udevice *dev;
 140         struct uclass *uc;
 141         int ret;
 142
 143         ret = uclass_get(UCLASS_MMC, &uc);
 144         if (ret)
 145                 return;
 146         uclass_foreach_dev(dev, uc) {
 147                 struct mmc *m = mmc_get_mmc_dev(dev);
 148
 149                 if (!m)
 150                         continue;
 151 #ifdef CONFIG_FSL_ESDHC_ADAPTER_IDENT
 152                 mmc_set_preinit(m, 1);
 153 #endif
 154                 if (m->preinit)
 155                         mmc_start_init(m);
 156         }
 157 }
 158
 159 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
 160 void print_mmc_devices(char separator)
 161 {
 162         struct udevice *dev;
 163         char *mmc_type;
 164         bool first = true;
 165
 166         for (uclass_first_device(UCLASS_MMC, &dev);
 167              dev;
 168              uclass_next_device(&dev), first = false) {
 169                 struct mmc *m = mmc_get_mmc_dev(dev);
 170
 171                 if (!first) {
 172                         printf("%c", separator);
 173                         if (separator != '\n')
 174                                 puts(" ");
 175                 }
 176                 if (m->has_init)
 177                         mmc_type = IS_SD(m) ? "SD" : "eMMC";
 178                 else
 179                         mmc_type = NULL;
 180
 181                 printf("%s: %d", m->cfg->name, mmc_get_blk_desc(m)->devnum);
 182                 if (mmc_type)
 183                         printf(" (%s)", mmc_type);
 184         }
 185
 186         printf("\n");
 187 }
 188
 189 #else
 190 void print_mmc_devices(char separator) { }
 191 #endif
 192
 193 int mmc_bind(struct udevice *dev, struct mmc *mmc, const struct mmc_config *cfg)
 194 {
 195         struct blk_desc *bdesc;
 196         struct udevice *bdev;
 197         int ret, devnum = -1;
 198
 199         if (!mmc_get_ops(dev))
 200                 return -ENOSYS;
 201 #ifndef CONFIG_SPL_BUILD
 202         /* Use the fixed index with aliase node's index */
 203         ret = dev_read_alias_seq(dev, &devnum);
 204         debug("%s: alias ret=%d, devnum=%d\n", __func__, ret, devnum);
 205 #endif
 206
 207         ret = blk_create_devicef(dev, "mmc_blk", "blk", IF_TYPE_MMC,
 208                         devnum, 512, 0, &bdev);
 209         if (ret) {
 210                 debug("Cannot create block device\n");
 211                 return ret;
 212         }
 213         bdesc = dev_get_uclass_platdata(bdev);
 214         mmc->cfg = cfg;
 215         mmc->priv = dev;
 216
 217         /* the following chunk was from mmc_register() */
 218
 219         /* Setup dsr related values */
 220         mmc->dsr_imp = 0;
 221         mmc->dsr = 0xffffffff;
 222         /* Setup the universal parts of the block interface just once */
 223         bdesc->removable = 1;
 224
 225         /* setup initial part type */
 226         bdesc->part_type = cfg->part_type;
 227         mmc->dev = dev;
 228
 229         return 0;
 230 }
 231
 232 int mmc_unbind(struct udevice *dev)
 233 {
 234         struct udevice *bdev;
 235
 236         device_find_first_child(dev, &bdev);
 237         if (bdev) {
 238                 device_remove(bdev, DM_REMOVE_NORMAL);
 239                 device_unbind(bdev);
 240         }
 241
 242         return 0;
 243 }
 244
 245 static int mmc_select_hwpart(struct udevice *bdev, int hwpart)
 246 {
 247         struct udevice *mmc_dev = dev_get_parent(bdev);
 248         struct mmc *mmc = mmc_get_mmc_dev(mmc_dev);
 249         struct blk_desc *desc = dev_get_uclass_platdata(bdev);
 250
 251         if (desc->hwpart == hwpart)
 252                 return 0;
 253
 254         if (mmc->part_config == MMCPART_NOAVAILABLE)
 255                 return -EMEDIUMTYPE;
 256
 257         return mmc_switch_part(mmc, hwpart);
 258 }
 259
 260 static int mmc_blk_probe(struct udevice *dev)
 261 {
 262         struct udevice *mmc_dev = dev_get_parent(dev);
 263         struct mmc_uclass_priv *upriv = dev_get_uclass_priv(mmc_dev);
 264         struct mmc *mmc = upriv->mmc;
 265         int ret;
 266
 267         ret = mmc_init(mmc);
 268         if (ret) {
 269                 debug("%s: mmc_init() failed (err=%d)\n", __func__, ret);
 270                 return ret;
 271         }
 272
 273         return 0;
 274 }
 275
 276 static const struct blk_ops mmc_blk_ops = {
 277         .read   = mmc_bread,
 278 #ifndef CONFIG_SPL_BUILD
 279         .write  = mmc_bwrite,
 280         .erase  = mmc_berase,
 281 #endif
 282         .select_hwpart  = mmc_select_hwpart,
 283 };
 284
 285 U_BOOT_DRIVER(mmc_blk) = {
 286         .name           = "mmc_blk",
 287         .id             = UCLASS_BLK,
 288         .ops            = &mmc_blk_ops,
 289         .probe          = mmc_blk_probe,
 290 };
 291 #endif /* CONFIG_BLK */
 292
 293 U_BOOT_DRIVER(mmc) = {
 294         .name   = "mmc",
 295         .id     = UCLASS_MMC,
 296 };
 297
 298 UCLASS_DRIVER(mmc) = {
 299         .id             = UCLASS_MMC,
 300         .name           = "mmc",
 301         .flags          = DM_UC_FLAG_SEQ_ALIAS,
 302         .per_device_auto_alloc_size = sizeof(struct mmc_uclass_priv),
 303 };