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 #ifdef CONFIG_DM_MMC_OPS
  19 int dm_mmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
  20                     struct mmc_data *data)
  21 {
  22         struct mmc *mmc = mmc_get_mmc_dev(dev);
  23         struct dm_mmc_ops *ops = mmc_get_ops(dev);
  24         int ret;
  25
  26         mmmc_trace_before_send(mmc, cmd);
  27         if (ops->send_cmd)
  28                 ret = ops->send_cmd(dev, cmd, data);
  29         else
  30                 ret = -ENOSYS;
  31         mmmc_trace_after_send(mmc, cmd, ret);
  32
  33         return ret;
  34 }
  35
  36 int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
  37 {
  38         return dm_mmc_send_cmd(mmc->dev, cmd, data);
  39 }
  40
  41 int dm_mmc_set_ios(struct udevice *dev)
  42 {
  43         struct dm_mmc_ops *ops = mmc_get_ops(dev);
  44
  45         if (!ops->set_ios)
  46                 return -ENOSYS;
  47         return ops->set_ios(dev);
  48 }
  49
  50 int mmc_set_ios(struct mmc *mmc)
  51 {
  52         return dm_mmc_set_ios(mmc->dev);
  53 }
  54
  55 int dm_mmc_get_wp(struct udevice *dev)
  56 {
  57         struct dm_mmc_ops *ops = mmc_get_ops(dev);
  58
  59         if (!ops->get_wp)
  60                 return -ENOSYS;
  61         return ops->get_wp(dev);
  62 }
  63
  64 int mmc_getwp(struct mmc *mmc)
  65 {
  66         return dm_mmc_get_wp(mmc->dev);
  67 }
  68
  69 int dm_mmc_get_cd(struct udevice *dev)
  70 {
  71         struct dm_mmc_ops *ops = mmc_get_ops(dev);
  72
  73         if (!ops->get_cd)
  74                 return -ENOSYS;
  75         return ops->get_cd(dev);
  76 }
  77
  78 int mmc_getcd(struct mmc *mmc)
  79 {
  80         return dm_mmc_get_cd(mmc->dev);
  81 }
  82 #endif
  83
  84 struct mmc *mmc_get_mmc_dev(struct udevice *dev)
  85 {
  86         struct mmc_uclass_priv *upriv;
  87
  88         if (!device_active(dev))
  89                 return NULL;
  90         upriv = dev_get_uclass_priv(dev);
  91         return upriv->mmc;
  92 }
  93
  94 #ifdef CONFIG_BLK
  95 struct mmc *find_mmc_device(int dev_num)
  96 {
  97         struct udevice *dev, *mmc_dev;
  98         int ret;
  99
 100         ret = blk_get_device(IF_TYPE_MMC, dev_num, &dev);
 101
 102         if (ret) {
 103 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
 104                 printf("MMC Device %d not found\n", dev_num);
 105 #endif
 106                 return NULL;
 107         }
 108
 109         mmc_dev = dev_get_parent(dev);
 110
 111         return mmc_get_mmc_dev(mmc_dev);
 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 #ifndef CONFIG_SPL_BUILD
 200         /* Use the fixed index with aliase node's index */
 201         fdtdec_get_alias_seq(gd->fdt_blob, "mmc", dev->of_offset, &devnum);
 202 #endif
 203
 204         ret = blk_create_devicef(dev, "mmc_blk", "blk", IF_TYPE_MMC,
 205                         devnum, 512, 0, &bdev);
 206         if (ret) {
 207                 debug("Cannot create block device\n");
 208                 return ret;
 209         }
 210         bdesc = dev_get_uclass_platdata(bdev);
 211         mmc->cfg = cfg;
 212         mmc->priv = dev;
 213
 214         /* the following chunk was from mmc_register() */
 215
 216         /* Setup dsr related values */
 217         mmc->dsr_imp = 0;
 218         mmc->dsr = 0xffffffff;
 219         /* Setup the universal parts of the block interface just once */
 220         bdesc->removable = 1;
 221
 222         /* setup initial part type */
 223         bdesc->part_type = cfg->part_type;
 224         mmc->dev = dev;
 225
 226         return 0;
 227 }
 228
 229 int mmc_unbind(struct udevice *dev)
 230 {
 231         struct udevice *bdev;
 232
 233         device_find_first_child(dev, &bdev);
 234         if (bdev) {
 235                 device_remove(bdev, DM_REMOVE_NORMAL);
 236                 device_unbind(bdev);
 237         }
 238
 239         return 0;
 240 }
 241
 242 static int mmc_select_hwpart(struct udevice *bdev, int hwpart)
 243 {
 244         struct udevice *mmc_dev = dev_get_parent(bdev);
 245         struct mmc *mmc = mmc_get_mmc_dev(mmc_dev);
 246         struct blk_desc *desc = dev_get_uclass_platdata(bdev);
 247
 248         if (desc->hwpart == hwpart)
 249                 return 0;
 250
 251         if (mmc->part_config == MMCPART_NOAVAILABLE)
 252                 return -EMEDIUMTYPE;
 253
 254         return mmc_switch_part(mmc, hwpart);
 255 }
 256
 257 static int mmc_blk_probe(struct udevice *dev)
 258 {
 259         struct blk_desc *block_dev = dev_get_uclass_platdata(dev);
 260         int dev_num = block_dev->devnum;
 261         struct mmc *mmc = find_mmc_device(dev_num);
 262
 263         if (!mmc)
 264                 return -ENODEV;
 265         return mmc_init(mmc);
 266 }
 267
 268 static const struct blk_ops mmc_blk_ops = {
 269         .read   = mmc_bread,
 270 #ifndef CONFIG_SPL_BUILD
 271         .write  = mmc_bwrite,
 272         .erase  = mmc_berase,
 273 #endif
 274         .select_hwpart  = mmc_select_hwpart,
 275 };
 276
 277 U_BOOT_DRIVER(mmc_blk) = {
 278         .name           = "mmc_blk",
 279         .id             = UCLASS_BLK,
 280         .ops            = &mmc_blk_ops,
 281         .probe          = mmc_blk_probe,
 282 };
 283 #endif /* CONFIG_BLK */
 284
 285 U_BOOT_DRIVER(mmc) = {
 286         .name   = "mmc",
 287         .id     = UCLASS_MMC,
 288 };
 289
 290 UCLASS_DRIVER(mmc) = {
 291         .id             = UCLASS_MMC,
 292         .name           = "mmc",
 293         .flags          = DM_UC_FLAG_SEQ_ALIAS,
 294         .per_device_auto_alloc_size = sizeof(struct mmc_uclass_priv),
 295 };