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path: root/drivers/mmc/renesas-sdhi.c
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Diffstat (limited to 'drivers/mmc/renesas-sdhi.c')
-rw-r--r--drivers/mmc/renesas-sdhi.c149
1 files changed, 130 insertions, 19 deletions
diff --git a/drivers/mmc/renesas-sdhi.c b/drivers/mmc/renesas-sdhi.c
index e7f96f8bf22..733b6d62f5d 100644
--- a/drivers/mmc/renesas-sdhi.c
+++ b/drivers/mmc/renesas-sdhi.c
@@ -17,7 +17,9 @@
#include "tmio-common.h"
-#if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT)
+#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \
+ CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \
+ CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
/* SCC registers */
#define RENESAS_SDHI_SCC_DTCNTL 0x800
@@ -107,6 +109,56 @@ static void renesas_sdhi_reset_tuning(struct tmio_sd_priv *priv)
tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_RVSCNTL);
}
+static int renesas_sdhi_hs400(struct udevice *dev)
+{
+ struct tmio_sd_priv *priv = dev_get_priv(dev);
+ struct mmc *mmc = mmc_get_mmc_dev(dev);
+ bool hs400 = (mmc->selected_mode == MMC_HS_400);
+ int ret, taps = hs400 ? priv->nrtaps : 8;
+ u32 reg;
+
+ if (taps == 4) /* HS400 on 4tap SoC needs different clock */
+ ret = clk_set_rate(&priv->clk, 400000000);
+ else
+ ret = clk_set_rate(&priv->clk, 200000000);
+ if (ret < 0)
+ return ret;
+
+ tmio_sd_writel(priv, 0, RENESAS_SDHI_SCC_RVSREQ);
+
+ reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_TMPPORT2);
+ if (hs400) {
+ reg |= RENESAS_SDHI_SCC_TMPPORT2_HS400EN |
+ RENESAS_SDHI_SCC_TMPPORT2_HS400OSEL;
+ } else {
+ reg &= ~(RENESAS_SDHI_SCC_TMPPORT2_HS400EN |
+ RENESAS_SDHI_SCC_TMPPORT2_HS400OSEL);
+ }
+
+ tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_TMPPORT2);
+
+ tmio_sd_writel(priv, (taps << RENESAS_SDHI_SCC_DTCNTL_TAPNUM_SHIFT) |
+ RENESAS_SDHI_SCC_DTCNTL_TAPEN,
+ RENESAS_SDHI_SCC_DTCNTL);
+
+ if (taps == 4) {
+ tmio_sd_writel(priv, priv->tap_set >> 1,
+ RENESAS_SDHI_SCC_TAPSET);
+ } else {
+ tmio_sd_writel(priv, priv->tap_set, RENESAS_SDHI_SCC_TAPSET);
+ }
+
+ reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_CKSEL);
+ reg |= RENESAS_SDHI_SCC_CKSEL_DTSEL;
+ tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_CKSEL);
+
+ reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_RVSCNTL);
+ reg |= RENESAS_SDHI_SCC_RVSCNTL_RVSEN;
+ tmio_sd_writel(priv, reg, RENESAS_SDHI_SCC_RVSCNTL);
+
+ return 0;
+}
+
static void renesas_sdhi_prepare_tuning(struct tmio_sd_priv *priv,
unsigned long tap)
{
@@ -125,7 +177,6 @@ static int renesas_sdhi_select_tuning(struct tmio_sd_priv *priv,
unsigned int smpcmp)
{
unsigned long tap_cnt; /* counter of tuning success */
- unsigned long tap_set; /* tap position */
unsigned long tap_start;/* start position of tuning success */
unsigned long tap_end; /* end position of tuning success */
unsigned long ntap; /* temporary counter of tuning success */
@@ -209,12 +260,12 @@ static int renesas_sdhi_select_tuning(struct tmio_sd_priv *priv,
select = true;
if (select)
- tap_set = ((tap_start + tap_end) / 2) % tap_num;
+ priv->tap_set = ((tap_start + tap_end) / 2) % tap_num;
else
return -EIO;
/* Set SCC */
- tmio_sd_writel(priv, tap_set, RENESAS_SDHI_SCC_TAPSET);
+ tmio_sd_writel(priv, priv->tap_set, RENESAS_SDHI_SCC_TAPSET);
/* Enable auto re-tuning */
reg = tmio_sd_readl(priv, RENESAS_SDHI_SCC_RVSCNTL);
@@ -240,6 +291,7 @@ int renesas_sdhi_execute_tuning(struct udevice *dev, uint opcode)
/* clock tuning is not needed for upto 52MHz */
if (!((mmc->selected_mode == MMC_HS_200) ||
+ (mmc->selected_mode == MMC_HS_400) ||
(mmc->selected_mode == UHS_SDR104) ||
(mmc->selected_mode == UHS_SDR50)))
return 0;
@@ -287,19 +339,42 @@ out:
return ret;
}
+#else
+static int renesas_sdhi_hs400(struct udevice *dev)
+{
+ return 0;
+}
#endif
static int renesas_sdhi_set_ios(struct udevice *dev)
{
- int ret = tmio_sd_set_ios(dev);
+ struct tmio_sd_priv *priv = dev_get_priv(dev);
+ u32 tmp;
+ int ret;
- mdelay(10);
+ /* Stop the clock before changing its rate to avoid a glitch signal */
+ tmp = tmio_sd_readl(priv, TMIO_SD_CLKCTL);
+ tmp &= ~TMIO_SD_CLKCTL_SCLKEN;
+ tmio_sd_writel(priv, tmp, TMIO_SD_CLKCTL);
-#if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT)
- struct tmio_sd_priv *priv = dev_get_priv(dev);
+ ret = renesas_sdhi_hs400(dev);
+ if (ret)
+ return ret;
+
+ ret = tmio_sd_set_ios(dev);
- if (priv->caps & TMIO_SD_CAP_RCAR_UHS)
+ mdelay(10);
+
+#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \
+ CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \
+ CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
+ struct mmc *mmc = mmc_get_mmc_dev(dev);
+ if ((priv->caps & TMIO_SD_CAP_RCAR_UHS) &&
+ (mmc->selected_mode != UHS_SDR104) &&
+ (mmc->selected_mode != MMC_HS_200) &&
+ (mmc->selected_mode != MMC_HS_400)) {
renesas_sdhi_reset_tuning(priv);
+ }
#endif
return ret;
@@ -331,7 +406,9 @@ static const struct dm_mmc_ops renesas_sdhi_ops = {
.send_cmd = tmio_sd_send_cmd,
.set_ios = renesas_sdhi_set_ios,
.get_cd = tmio_sd_get_cd,
-#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || CONFIG_IS_ENABLED(MMC_HS200_SUPPORT)
+#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \
+ CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \
+ CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
.execute_tuning = renesas_sdhi_execute_tuning,
#endif
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
@@ -358,15 +435,45 @@ static const struct udevice_id renesas_sdhi_match[] = {
{ /* sentinel */ }
};
+static ulong renesas_sdhi_clk_get_rate(struct tmio_sd_priv *priv)
+{
+ return clk_get_rate(&priv->clk);
+}
+
+static void renesas_sdhi_filter_caps(struct udevice *dev)
+{
+ struct tmio_sd_plat *plat = dev_get_platdata(dev);
+ struct tmio_sd_priv *priv = dev_get_priv(dev);
+
+ if (!(priv->caps & TMIO_SD_CAP_RCAR_GEN3))
+ return;
+
+ /* HS400 is not supported on H3 ES1.x and M3W ES1.0,ES1.1 */
+ if (((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A7795) &&
+ (rmobile_get_cpu_rev_integer() <= 1)) ||
+ ((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A7796) &&
+ (rmobile_get_cpu_rev_integer() == 1) &&
+ (rmobile_get_cpu_rev_fraction() <= 1)))
+ plat->cfg.host_caps &= ~MMC_MODE_HS400;
+
+ /* H3 ES2.0 uses 4 tuning taps */
+ if ((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A7795) &&
+ (rmobile_get_cpu_rev_integer() == 2))
+ priv->nrtaps = 4;
+ else
+ priv->nrtaps = 8;
+}
+
static int renesas_sdhi_probe(struct udevice *dev)
{
struct tmio_sd_priv *priv = dev_get_priv(dev);
u32 quirks = dev_get_driver_data(dev);
struct fdt_resource reg_res;
- struct clk clk;
DECLARE_GLOBAL_DATA_PTR;
int ret;
+ priv->clk_get_rate = renesas_sdhi_clk_get_rate;
+
if (quirks == RENESAS_GEN2_QUIRKS) {
ret = fdt_get_resource(gd->fdt_blob, dev_of_offset(dev),
"reg", 0, &reg_res);
@@ -380,29 +487,33 @@ static int renesas_sdhi_probe(struct udevice *dev)
quirks |= TMIO_SD_CAP_16BIT;
}
- ret = clk_get_by_index(dev, 0, &clk);
+ ret = clk_get_by_index(dev, 0, &priv->clk);
if (ret < 0) {
dev_err(dev, "failed to get host clock\n");
return ret;
}
/* set to max rate */
- priv->mclk = clk_set_rate(&clk, ULONG_MAX);
- if (IS_ERR_VALUE(priv->mclk)) {
+ ret = clk_set_rate(&priv->clk, 200000000);
+ if (ret < 0) {
dev_err(dev, "failed to set rate for host clock\n");
- clk_free(&clk);
- return priv->mclk;
+ clk_free(&priv->clk);
+ return ret;
}
- ret = clk_enable(&clk);
- clk_free(&clk);
+ ret = clk_enable(&priv->clk);
if (ret) {
dev_err(dev, "failed to enable host clock\n");
return ret;
}
ret = tmio_sd_probe(dev, quirks);
-#if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT)
+
+ renesas_sdhi_filter_caps(dev);
+
+#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \
+ CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \
+ CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
if (!ret && (priv->caps & TMIO_SD_CAP_RCAR_UHS))
renesas_sdhi_reset_tuning(priv);
#endif
generated by cgit v1.2.3 (git 2.0.4) at 2025-07-17 09:40:59 +0000