mmc: renesas-sdhi: Add Renesas SDR104/HS200 tuning support

[u-boot] / drivers / mmc / sti_sdhci.c

diff --git a/drivers/mmc/sti_sdhci.c b/drivers/mmc/sti_sdhci.c
index 2a07082036456207fb674febaefd9bb826da421f..1c92bb2b377dc0fb7cfbb5583a6e231b27e61937 100644 (file)
--- a/drivers/mmc/sti_sdhci.c
+++ b/drivers/mmc/sti_sdhci.c
@@ -1,13 +1,14 @@
 /*
- *  Copyright (c) 2017
- *  Patrice Chotard <patrice.chotard@st.com>
+ * Copyright (C) 2017, STMicroelectronics - All Rights Reserved
+ * Author(s): Patrice Chotard, <patrice.chotard@st.com> for STMicroelectronics.
  *
- * SPDX-License-Identifier:    GPL-2.0
+ * SPDX-License-Identifier:    GPL-2.0+
  */
 
 #include <common.h>
 #include <dm.h>
 #include <mmc.h>
+#include <reset-uclass.h>
 #include <sdhci.h>
 #include <asm/arch/sdhci.h>
 
@@ -16,18 +17,14 @@ DECLARE_GLOBAL_DATA_PTR;
 struct sti_sdhci_plat {
        struct mmc_config cfg;
        struct mmc mmc;
+       struct reset_ctl reset;
+       int instance;
 };
 
-/*
- * used to get access to MMC1 reset,
- * will be removed when STi reset driver will be available
- */
-#define STIH410_SYSCONF5_BASE          0x092b0000
-
 /**
  * sti_mmc_core_config: configure the Arasan HC
- * @regbase: base address
- * @mmc_instance: mmc instance id
+ * @dev : udevice
+ *
  * Description: this function is to configure the Arasan MMC HC.
  * This should be called when the system starts in case of, on the SoC,
  * it is needed to configure the host controller.
@@ -36,33 +33,39 @@ struct sti_sdhci_plat {
  * W/o these settings the SDHCI could configure and use the embedded controller
  * with limited features.
  */
-static void sti_mmc_core_config(const u32 regbase, int mmc_instance)
+static int sti_mmc_core_config(struct udevice *dev)
 {
-       unsigned long *sysconf;
+       struct sti_sdhci_plat *plat = dev_get_platdata(dev);
+       struct sdhci_host *host = dev_get_priv(dev);
+       int ret;
 
        /* only MMC1 has a reset line */
-       if (mmc_instance) {
-               sysconf = (unsigned long *)(STIH410_SYSCONF5_BASE +
-                         ST_MMC_CCONFIG_REG_5);
-               generic_set_bit(SYSCONF_MMC1_ENABLE_BIT, sysconf);
+       if (plat->instance) {
+               ret = reset_deassert(&plat->reset);
+               if (ret < 0) {
+                       pr_err("MMC1 deassert failed: %d", ret);
+                       return ret;
+               }
        }
 
        writel(STI_FLASHSS_MMC_CORE_CONFIG_1,
-              regbase + FLASHSS_MMC_CORE_CONFIG_1);
+              host->ioaddr + FLASHSS_MMC_CORE_CONFIG_1);
 
-       if (mmc_instance) {
+       if (plat->instance) {
                writel(STI_FLASHSS_MMC_CORE_CONFIG2,
-                      regbase + FLASHSS_MMC_CORE_CONFIG_2);
+                      host->ioaddr + FLASHSS_MMC_CORE_CONFIG_2);
                writel(STI_FLASHSS_MMC_CORE_CONFIG3,
-                      regbase + FLASHSS_MMC_CORE_CONFIG_3);
+                      host->ioaddr + FLASHSS_MMC_CORE_CONFIG_3);
        } else {
                writel(STI_FLASHSS_SDCARD_CORE_CONFIG2,
-                      regbase + FLASHSS_MMC_CORE_CONFIG_2);
+                      host->ioaddr + FLASHSS_MMC_CORE_CONFIG_2);
                writel(STI_FLASHSS_SDCARD_CORE_CONFIG3,
-                      regbase + FLASHSS_MMC_CORE_CONFIG_3);
+                      host->ioaddr + FLASHSS_MMC_CORE_CONFIG_3);
        }
        writel(STI_FLASHSS_MMC_CORE_CONFIG4,
-              regbase + FLASHSS_MMC_CORE_CONFIG_4);
+              host->ioaddr + FLASHSS_MMC_CORE_CONFIG_4);
+
+       return 0;
 }
 
 static int sti_sdhci_probe(struct udevice *dev)
@@ -70,20 +73,25 @@ static int sti_sdhci_probe(struct udevice *dev)
        struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
        struct sti_sdhci_plat *plat = dev_get_platdata(dev);
        struct sdhci_host *host = dev_get_priv(dev);
-       int ret, mmc_instance;
+       int ret;
 
        /*
         * identify current mmc instance, mmc1 has a reset, not mmc0
         * MMC0 is wired to the SD slot,
         * MMC1 is wired on the high speed connector
         */
-
-       if (fdt_getprop(gd->fdt_blob, dev_of_offset(dev), "resets", NULL))
-               mmc_instance = 1;
+       ret = reset_get_by_index(dev, 0, &plat->reset);
+       if (!ret)
+               plat->instance = 1;
        else
-               mmc_instance = 0;
+               if (ret == -ENOENT)
+                       plat->instance = 0;
+               else
+                       return ret;
 
-       sti_mmc_core_config((const u32) host->ioaddr, mmc_instance);
+       ret = sti_mmc_core_config(dev);
+       if (ret)
+               return ret;
 
        host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD |
                       SDHCI_QUIRK_32BIT_DMA_ADDR |
@@ -108,7 +116,7 @@ static int sti_sdhci_ofdata_to_platdata(struct udevice *dev)
        struct sdhci_host *host = dev_get_priv(dev);
 
        host->name = strdup(dev->name);
-       host->ioaddr = (void *)dev_get_addr(dev);
+       host->ioaddr = (void *)devfdt_get_addr(dev);
 
        host->bus_width = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
                                         "bus-width", 4);