mmc: tmio: sdhi: Add calibration tables
Instead of using single fixed value for the calibration offset,
add tables which dynamically adjust this per calibration code
from the SCC.
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/drivers/mmc/renesas-sdhi.c b/drivers/mmc/renesas-sdhi.c
index 087d8b4..e01ac31 100644
--- a/drivers/mmc/renesas-sdhi.c
+++ b/drivers/mmc/renesas-sdhi.c
@@ -63,6 +63,49 @@
#define RENESAS_SDHI_MAX_TAP 3
+#define CALIB_TABLE_MAX (RENESAS_SDHI_SCC_TMPPORT_CALIB_CODE_MASK + 1)
+
+static const u8 r8a7795_calib_table[2][CALIB_TABLE_MAX] = {
+ { 0, 0, 0, 0, 0, 1, 1, 2, 3, 4, 5, 5, 6, 6, 7, 11,
+ 15, 16, 16, 17, 17, 17, 17, 17, 18, 18, 18, 18, 19, 20, 21, 21 },
+ { 3, 3, 4, 4, 5, 6, 6, 7, 8, 8, 9, 9, 10, 11, 12, 15,
+ 16, 16, 17, 17, 17, 17, 17, 18, 18, 18, 18, 19, 20, 21, 22, 22 }
+};
+
+static const u8 r8a7796_rev1_calib_table[2][CALIB_TABLE_MAX] = {
+ { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 3, 4, 9,
+ 15, 15, 15, 16, 16, 16, 16, 16, 17, 18, 19, 20, 21, 21, 22, 22 },
+ { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
+ 2, 9, 16, 17, 17, 17, 18, 18, 18, 18, 19, 20, 21, 22, 23, 24}
+};
+
+static const u8 r8a7796_rev3_calib_table[2][CALIB_TABLE_MAX] = {
+ { 0, 0, 0, 0, 2, 3, 4, 4, 5, 6, 7, 7, 8, 9, 9, 10,
+ 11, 12, 13, 15, 16, 17, 17, 18, 19, 19, 20, 21, 21, 22, 23, 23 },
+ { 1, 2, 2, 3, 4, 4, 5, 6, 6, 7, 8, 9, 9, 10, 11, 12,
+ 13, 14, 15, 16, 17, 17, 18, 19, 20, 20, 21, 22, 22, 23, 24, 24 }
+};
+
+static const u8 r8a77965_calib_table[2][CALIB_TABLE_MAX] = {
+ { 0, 1, 2, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15,
+ 16, 17, 18, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 29 },
+ { 0, 1, 2, 2, 2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 15,
+ 16, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 31 }
+};
+
+static const u8 r8a77990_calib_table[2][CALIB_TABLE_MAX] = {
+ { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+ { 0, 0, 1, 2, 3, 4, 4, 4, 4, 5, 5, 6, 7, 8, 10, 11,
+ 12, 13, 14, 16, 17, 18, 18, 18, 19, 19, 20, 24, 26, 26, 26, 26 }
+};
+
+static int rmobile_is_gen3_mmc0(struct tmio_sd_priv *priv)
+{
+ /* On R-Car Gen3, MMC0 is at 0xee140000 */
+ return (uintptr_t)(priv->regbase) == 0xee140000;
+}
+
static u32 sd_scc_tmpport_read32(struct tmio_sd_priv *priv, u32 addr)
{
/* read mode */
@@ -198,28 +241,30 @@
if (!priv->needs_adjust_hs400)
return;
+ if (!priv->adjust_hs400_calib_table)
+ return;
+
/*
* Enabled Manual adjust HS400 mode
*
* 1) Disabled Write Protect
* W(addr=0x00, WP_DISABLE_CODE)
- * 2) Read Calibration code and adjust
- * R(addr=0x26) - adjust value
- * 3) Enabled Manual Calibration
+ *
+ * 2) Read Calibration code
+ * read_value = R(addr=0x26)
+ * 3) Refer to calibration table
+ * Calibration code = table[read_value]
+ * 4) Enabled Manual Calibration
* W(addr=0x22, manual mode | Calibration code)
- * 4) Set Offset value to TMPPORT3 Reg
+ * 5) Set Offset value to TMPPORT3 Reg
*/
sd_scc_tmpport_write32(priv, 0x00,
RENESAS_SDHI_SCC_TMPPORT_DISABLE_WP_CODE);
calib_code = sd_scc_tmpport_read32(priv, 0x26);
calib_code &= RENESAS_SDHI_SCC_TMPPORT_CALIB_CODE_MASK;
- if (calib_code > priv->adjust_hs400_calibrate)
- calib_code -= priv->adjust_hs400_calibrate;
- else
- calib_code = 0;
sd_scc_tmpport_write32(priv, 0x22,
RENESAS_SDHI_SCC_TMPPORT_MANUAL_MODE |
- calib_code);
+ priv->adjust_hs400_calib_table[calib_code]);
tmio_sd_writel(priv, priv->adjust_hs400_offset,
RENESAS_SDHI_SCC_TMPPORT3);
@@ -705,18 +750,22 @@
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,ES1.2 */
+#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \
+ CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \
+ CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
+ struct tmio_sd_plat *plat = dev_get_platdata(dev);
+
+ /* 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() <= 2)))
+ (rmobile_get_cpu_rev_fraction() < 2)))
plat->cfg.host_caps &= ~MMC_MODE_HS400;
/* H3 ES2.0, ES3.0 and M3W ES1.2 and M3N bad taps */
@@ -728,28 +777,50 @@
(rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A77965))
priv->hs400_bad_tap = BIT(2) | BIT(3) | BIT(6) | BIT(7);
+ /* H3 ES3.0 can use HS400 with manual adjustment */
+ if ((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A7795) &&
+ (rmobile_get_cpu_rev_integer() >= 3)) {
+ priv->adjust_hs400_enable = true;
+ priv->adjust_hs400_offset = 0;
+ priv->adjust_hs400_calib_table =
+ r8a7795_calib_table[!rmobile_is_gen3_mmc0(priv)];
+ }
+
+ /* M3W ES1.2 can use HS400 with manual adjustment */
+ if ((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A7796) &&
+ (rmobile_get_cpu_rev_integer() == 1) &&
+ (rmobile_get_cpu_rev_fraction() == 2)) {
+ priv->adjust_hs400_enable = true;
+ priv->adjust_hs400_offset = 3;
+ priv->adjust_hs400_calib_table =
+ r8a7796_rev1_calib_table[!rmobile_is_gen3_mmc0(priv)];
+ }
+
/* M3W ES1.x for x>2 can use HS400 with manual adjustment and taps */
if ((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A7796) &&
(rmobile_get_cpu_rev_integer() == 1) &&
(rmobile_get_cpu_rev_fraction() > 2)) {
priv->adjust_hs400_enable = true;
- priv->adjust_hs400_offset = 3;
- priv->adjust_hs400_calibrate = 0x9;
+ priv->adjust_hs400_offset = 0;
priv->hs400_bad_tap = BIT(1) | BIT(3) | BIT(5) | BIT(7);
+ priv->adjust_hs400_calib_table =
+ r8a7796_rev3_calib_table[!rmobile_is_gen3_mmc0(priv)];
}
/* M3N can use HS400 with manual adjustment */
if (rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A77965) {
priv->adjust_hs400_enable = true;
priv->adjust_hs400_offset = 3;
- priv->adjust_hs400_calibrate = 0x0;
+ priv->adjust_hs400_calib_table =
+ r8a77965_calib_table[!rmobile_is_gen3_mmc0(priv)];
}
/* E3 can use HS400 with manual adjustment */
if (rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A77990) {
priv->adjust_hs400_enable = true;
priv->adjust_hs400_offset = 3;
- priv->adjust_hs400_calibrate = 0x4;
+ priv->adjust_hs400_calib_table =
+ r8a77990_calib_table[!rmobile_is_gen3_mmc0(priv)];
}
/* H3 ES1.x, ES2.0 and M3W ES1.0, ES1.1, ES1.2 uses 4 tuning taps */
@@ -761,7 +832,7 @@
priv->nrtaps = 4;
else
priv->nrtaps = 8;
-
+#endif
/* H3 ES1.x and M3W ES1.0 uses bit 17 for DTRAEND */
if (((rmobile_get_cpu_type() == RMOBILE_CPU_TYPE_R8A7795) &&
(rmobile_get_cpu_rev_integer() <= 1)) ||
diff --git a/drivers/mmc/tmio-common.h b/drivers/mmc/tmio-common.h
index f39118e..0474588 100644
--- a/drivers/mmc/tmio-common.h
+++ b/drivers/mmc/tmio-common.h
@@ -146,6 +146,7 @@
u8 adjust_hs400_offset;
u8 adjust_hs400_calibrate;
u8 hs400_bad_tap;
+ const u8 *adjust_hs400_calib_table;
#endif
ulong (*clk_get_rate)(struct tmio_sd_priv *);
};