drivers/mmc/aspeed_sdhci.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2019 IBM Corp.
   4  * Eddie James <[email protected]>
   5  */
   6
   7 #include <clk.h>
   8 #include <dm.h>
   9 #include <malloc.h>
  10 #include <sdhci.h>
  11 #include <linux/err.h>
  12 #include <dm/lists.h>
  13
  14 struct aspeed_sdhci_plat {
  15         struct mmc_config cfg;
  16         struct mmc mmc;
  17 };
  18
  19 static int aspeed_sdhci_probe(struct udevice *dev)
  20 {
  21         struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
  22         struct aspeed_sdhci_plat *plat = dev_get_plat(dev);
  23         struct sdhci_host *host = dev_get_priv(dev);
  24         u32 max_clk;
  25         struct clk clk;
  26         int ret;
  27
  28         ret = clk_get_by_index(dev, 0, &clk);
  29         if (ret) {
  30                 debug("%s: clock get failed %d\n", __func__, ret);
  31                 return ret;
  32         }
  33
  34         ret = clk_enable(&clk);
  35         if (ret) {
  36                 debug("%s: clock enable failed %d\n", __func__, ret);
  37                 return ret;
  38         }
  39
  40         host->name = dev->name;
  41         host->ioaddr = dev_read_addr_ptr(dev);
  42
  43         max_clk = clk_get_rate(&clk);
  44         if (IS_ERR_VALUE(max_clk)) {
  45                 ret = max_clk;
  46                 debug("%s: clock rate get failed %d\n", __func__, ret);
  47                 goto err;
  48         }
  49
  50         host->max_clk = max_clk;
  51         host->mmc = &plat->mmc;
  52         host->mmc->dev = dev;
  53         host->mmc->priv = host;
  54         upriv->mmc = host->mmc;
  55
  56         ret = sdhci_setup_cfg(&plat->cfg, host, 0, 0);
  57         if (ret)
  58                 goto err;
  59
  60         ret = sdhci_probe(dev);
  61         if (ret)
  62                 goto err;
  63
  64         return 0;
  65
  66 err:
  67         clk_disable(&clk);
  68         return ret;
  69 }
  70
  71 static int aspeed_sdhci_bind(struct udevice *dev)
  72 {
  73         struct aspeed_sdhci_plat *plat = dev_get_plat(dev);
  74
  75         return sdhci_bind(dev, &plat->mmc, &plat->cfg);
  76 }
  77
  78 static const struct udevice_id aspeed_sdhci_ids[] = {
  79         { .compatible = "aspeed,ast2400-sdhci" },
  80         { .compatible = "aspeed,ast2500-sdhci" },
  81         { .compatible = "aspeed,ast2600-sdhci" },
  82         { }
  83 };
  84
  85 U_BOOT_DRIVER(aspeed_sdhci_drv) = {
  86         .name           = "aspeed_sdhci",
  87         .id             = UCLASS_MMC,
  88         .of_match       = aspeed_sdhci_ids,
  89         .ops            = &sdhci_ops,
  90         .bind           = aspeed_sdhci_bind,
  91         .probe          = aspeed_sdhci_probe,
  92         .priv_auto      = sizeof(struct sdhci_host),
  93         .plat_auto      = sizeof(struct aspeed_sdhci_plat),
  94 };
  95
  96 static int aspeed_sdc_probe(struct udevice *parent)
  97 {
  98         struct clk clk;
  99         int ret;
 100
 101         ret = clk_get_by_index(parent, 0, &clk);
 102         if (ret) {
 103                 debug("%s: clock get failed %d\n", __func__, ret);
 104                 return ret;
 105         }
 106
 107         ret = clk_enable(&clk);
 108         if (ret) {
 109                 debug("%s: clock enable failed %d\n", __func__, ret);
 110                 return ret;
 111         }
 112
 113         return 0;
 114 }
 115
 116 static const struct udevice_id aspeed_sdc_ids[] = {
 117         { .compatible = "aspeed,ast2400-sd-controller" },
 118         { .compatible = "aspeed,ast2500-sd-controller" },
 119         { .compatible = "aspeed,ast2600-sd-controller" },
 120         { }
 121 };
 122
 123 U_BOOT_DRIVER(aspeed_sdc_drv) = {
 124         .name           = "aspeed_sdc",
 125         .id             = UCLASS_MISC,
 126         .of_match       = aspeed_sdc_ids,
 127         .probe          = aspeed_sdc_probe,
 128 };