mmc: tegra: use correct alias for SDHCI/MMC nodes

[karo-tx-uboot.git] / drivers / mmc / tegra_mmc.c

diff --git a/drivers/mmc/tegra_mmc.c b/drivers/mmc/tegra_mmc.c
index 573819a01e21a69d83aa3a6fc63f4240c78a46d3..08b4bd48245a3166a982ec974cf9bfa33950d4a1 100644 (file)
--- a/drivers/mmc/tegra_mmc.c
+++ b/drivers/mmc/tegra_mmc.c
@@ -9,14 +9,27 @@
 
 #include <bouncebuf.h>
 #include <common.h>
+#include <dm/device.h>
+#include <errno.h>
 #include <asm/gpio.h>
 #include <asm/io.h>
+#ifndef CONFIG_TEGRA186
 #include <asm/arch/clock.h>
 #include <asm/arch-tegra/clk_rst.h>
+#endif
 #include <asm/arch-tegra/mmc.h>
 #include <asm/arch-tegra/tegra_mmc.h>
 #include <mmc.h>
 
+/*
+ * FIXME: TODO: This driver contains a number of ifdef CONFIG_TEGRA186 that
+ * should not be present. These are needed because newer Tegra SoCs support
+ * only the standard clock/reset APIs, whereas older Tegra SoCs support only
+ * a custom Tegra-specific API. ASAP the older Tegra SoCs' code should be
+ * fixed to implement the standard APIs, and all drivers converted to solely
+ * use the new standard APIs, with no ifdefs.
+ */
+
 DECLARE_GLOBAL_DATA_PTR;
 
 struct mmc_host mmc_host[CONFIG_SYS_MMC_MAX_DEVICE];
@@ -214,14 +227,14 @@ static int mmc_send_cmd_bounced(struct mmc *mmc, struct mmc_cmd *cmd,
        if (i == retry) {
                printf("%s: waiting for status update\n", __func__);
                writel(mask, &host->reg->norintsts);
-               return TIMEOUT;
+               return -ETIMEDOUT;
        }
 
        if (mask & TEGRA_MMC_NORINTSTS_CMD_TIMEOUT) {
                /* Timeout Error */
                debug("timeout: %08x cmd %d\n", mask, cmd->cmdidx);
                writel(mask, &host->reg->norintsts);
-               return TIMEOUT;
+               return -ETIMEDOUT;
        } else if (mask & TEGRA_MMC_NORINTSTS_ERR_INTERRUPT) {
                /* Error Interrupt */
                debug("error: %08x cmd %d\n", mask, cmd->cmdidx);
@@ -255,7 +268,7 @@ static int mmc_send_cmd_bounced(struct mmc *mmc, struct mmc_cmd *cmd,
                        if (i == retry) {
                                printf("%s: card is still busy\n", __func__);
                                writel(mask, &host->reg->norintsts);
-                               return TIMEOUT;
+                               return -ETIMEDOUT;
                        }
 
                        cmd->response[0] = readl(&host->reg->rspreg0);
@@ -357,8 +370,15 @@ static void mmc_change_clock(struct mmc_host *host, uint clock)
         */
        if (clock == 0)
                goto out;
+#ifdef CONFIG_TEGRA186
+       {
+               ulong rate = clk_set_rate(&host->clk, clock);
+               div = (rate + clock - 1) / clock;
+       }
+#else
        clock_adjust_periph_pll_div(host->mmc_id, CLOCK_ID_PERIPH, clock,
                                    &div);
+#endif
        debug("div = %d\n", div);
 
        writew(0, &host->reg->clkcon);
@@ -532,6 +552,9 @@ static int do_mmc_init(int dev_index, bool removable)
 {
        struct mmc_host *host;
        struct mmc *mmc;
+#ifdef CONFIG_TEGRA186
+       int ret;
+#endif
 
        /* DT should have been read & host config filled in */
        host = &mmc_host[dev_index];
@@ -543,7 +566,23 @@ static int do_mmc_init(int dev_index, bool removable)
              gpio_get_number(&host->cd_gpio));
 
        host->clock = 0;
+
+#ifdef CONFIG_TEGRA186
+       ret = reset_assert(&host->reset_ctl);
+       if (ret)
+               return ret;
+       ret = clk_enable(&host->clk);
+       if (ret)
+               return ret;
+       ret = clk_set_rate(&host->clk, 20000000);
+       if (IS_ERR_VALUE(ret))
+               return ret;
+       ret = reset_deassert(&host->reset_ctl);
+       if (ret)
+               return ret;
+#else
        clock_start_periph_pll(host->mmc_id, CLOCK_ID_PERIPH, 20000000);
+#endif
 
        if (dm_gpio_is_valid(&host->pwr_gpio))
                dm_gpio_set_value(&host->pwr_gpio, 1);
@@ -600,11 +639,33 @@ static int mmc_get_config(const void *blob, int node, struct mmc_host *host,
                return -FDT_ERR_NOTFOUND;
        }
 
+#ifdef CONFIG_TEGRA186
+       {
+               /*
+                * FIXME: This variable should go away when the MMC device
+                * actually is a udevice.
+                */
+               struct udevice dev;
+               int ret;
+               dev.of_offset = node;
+               ret = reset_get_by_name(&dev, "sdhci", &host->reset_ctl);
+               if (ret) {
+                       debug("reset_get_by_name() failed: %d\n", ret);
+                       return ret;
+               }
+               ret = clk_get_by_index(&dev, 0, &host->clk);
+               if (ret) {
+                       debug("clk_get_by_index() failed: %d\n", ret);
+                       return ret;
+               }
+       }
+#else
        host->mmc_id = clock_decode_periph_id(blob, node);
        if (host->mmc_id == PERIPH_ID_NONE) {
                debug("%s: could not decode periph id\n", __func__);
                return -FDT_ERR_NOTFOUND;
        }
+#endif
 
        /*
         * NOTE: mmc->bus_width is determined by mmc.c dynamically.
@@ -624,7 +685,13 @@ static int mmc_get_config(const void *blob, int node, struct mmc_host *host,
        *removablep = !fdtdec_get_bool(blob, node, "non-removable");
 
        debug("%s: found controller at %p, width = %d, periph_id = %d\n",
-               __func__, host->reg, host->width, host->mmc_id);
+               __func__, host->reg, host->width,
+#ifndef CONFIG_TEGRA186
+               host->mmc_id
+#else
+               -1
+#endif
+       );
        return 0;
 }
 
@@ -668,8 +735,18 @@ void tegra_mmc_init(void)
        const void *blob = gd->fdt_blob;
        debug("%s entry\n", __func__);
 
+       /* See if any Tegra186 MMC controllers are present */
+       count = fdtdec_find_aliases_for_id(blob, "mmc",
+               COMPAT_NVIDIA_TEGRA186_SDMMC, node_list,
+               CONFIG_SYS_MMC_MAX_DEVICE);
+       debug("%s: count of Tegra186 sdhci nodes is %d\n", __func__, count);
+       if (process_nodes(blob, node_list, count)) {
+               printf("%s: Error processing T186 mmc node(s)!\n", __func__);
+               return;
+       }
+
        /* See if any Tegra210 MMC controllers are present */
-       count = fdtdec_find_aliases_for_id(blob, "sdhci",
+       count = fdtdec_find_aliases_for_id(blob, "mmc",
                COMPAT_NVIDIA_TEGRA210_SDMMC, node_list,
                CONFIG_SYS_MMC_MAX_DEVICE);
        debug("%s: count of Tegra210 sdhci nodes is %d\n", __func__, count);
@@ -679,7 +756,7 @@ void tegra_mmc_init(void)
        }
 
        /* See if any Tegra124 MMC controllers are present */
-       count = fdtdec_find_aliases_for_id(blob, "sdhci",
+       count = fdtdec_find_aliases_for_id(blob, "mmc",
                COMPAT_NVIDIA_TEGRA124_SDMMC, node_list,
                CONFIG_SYS_MMC_MAX_DEVICE);
        debug("%s: count of Tegra124 sdhci nodes is %d\n", __func__, count);
@@ -689,7 +766,7 @@ void tegra_mmc_init(void)
        }
 
        /* See if any Tegra30 MMC controllers are present */
-       count = fdtdec_find_aliases_for_id(blob, "sdhci",
+       count = fdtdec_find_aliases_for_id(blob, "mmc",
                COMPAT_NVIDIA_TEGRA30_SDMMC, node_list,
                CONFIG_SYS_MMC_MAX_DEVICE);
        debug("%s: count of T30 sdhci nodes is %d\n", __func__, count);
@@ -699,7 +776,7 @@ void tegra_mmc_init(void)
        }
 
        /* Now look for any Tegra20 MMC controllers */
-       count = fdtdec_find_aliases_for_id(blob, "sdhci",
+       count = fdtdec_find_aliases_for_id(blob, "mmc",
                COMPAT_NVIDIA_TEGRA20_SDMMC, node_list,
                CONFIG_SYS_MMC_MAX_DEVICE);
        debug("%s: count of T20 sdhci nodes is %d\n", __func__, count);