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