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-rw-r--r--drivers/mmc/host/sdhci_am654.c135
1 files changed, 110 insertions, 25 deletions
diff --git a/drivers/mmc/host/sdhci_am654.c b/drivers/mmc/host/sdhci_am654.c
index d0b20780dd0f..4575aeb435ec 100644
--- a/drivers/mmc/host/sdhci_am654.c
+++ b/drivers/mmc/host/sdhci_am654.c
@@ -6,6 +6,7 @@
*
*/
#include <linux/clk.h>
+#include <linux/of.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/property.h>
@@ -36,11 +37,14 @@
#define OTAPDLYSEL_SHIFT 12
#define OTAPDLYSEL_MASK GENMASK(15, 12)
#define STRBSEL_SHIFT 24
-#define STRBSEL_MASK GENMASK(27, 24)
+#define STRBSEL_4BIT_MASK GENMASK(27, 24)
+#define STRBSEL_8BIT_MASK GENMASK(31, 24)
#define SEL50_SHIFT 8
#define SEL50_MASK BIT(SEL50_SHIFT)
#define SEL100_SHIFT 9
#define SEL100_MASK BIT(SEL100_SHIFT)
+#define FREQSEL_SHIFT 8
+#define FREQSEL_MASK GENMASK(10, 8)
#define DLL_TRIM_ICP_SHIFT 4
#define DLL_TRIM_ICP_MASK GENMASK(7, 4)
#define DR_TY_SHIFT 20
@@ -77,13 +81,23 @@ struct sdhci_am654_data {
int trm_icp;
int drv_strength;
bool dll_on;
+ int strb_sel;
+ u32 flags;
+};
+
+struct sdhci_am654_driver_data {
+ const struct sdhci_pltfm_data *pdata;
+ u32 flags;
+#define IOMUX_PRESENT (1 << 0)
+#define FREQSEL_2_BIT (1 << 1)
+#define STRBSEL_4_BIT (1 << 2)
};
static void sdhci_am654_set_clock(struct sdhci_host *host, unsigned int clock)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct sdhci_am654_data *sdhci_am654 = sdhci_pltfm_priv(pltfm_host);
- int sel50, sel100;
+ int sel50, sel100, freqsel;
u32 mask, val;
int ret;
@@ -101,24 +115,52 @@ static void sdhci_am654_set_clock(struct sdhci_host *host, unsigned int clock)
val = (1 << OTAPDLYENA_SHIFT) |
(sdhci_am654->otap_del_sel << OTAPDLYSEL_SHIFT);
regmap_update_bits(sdhci_am654->base, PHY_CTRL4, mask, val);
- switch (clock) {
- case 200000000:
- sel50 = 0;
- sel100 = 0;
- break;
- case 100000000:
- sel50 = 0;
- sel100 = 1;
- break;
- default:
- sel50 = 1;
- sel100 = 0;
+ /* Write to STRBSEL for HS400 speed mode */
+ if (host->mmc->ios.timing == MMC_TIMING_MMC_HS400) {
+ if (sdhci_am654->flags & STRBSEL_4_BIT)
+ mask = STRBSEL_4BIT_MASK;
+ else
+ mask = STRBSEL_8BIT_MASK;
+
+ regmap_update_bits(sdhci_am654->base, PHY_CTRL4, mask,
+ sdhci_am654->strb_sel <<
+ STRBSEL_SHIFT);
+ }
+
+ if (sdhci_am654->flags & FREQSEL_2_BIT) {
+ switch (clock) {
+ case 200000000:
+ sel50 = 0;
+ sel100 = 0;
+ break;
+ case 100000000:
+ sel50 = 0;
+ sel100 = 1;
+ break;
+ default:
+ sel50 = 1;
+ sel100 = 0;
+ }
+
+ /* Configure PHY DLL frequency */
+ mask = SEL50_MASK | SEL100_MASK;
+ val = (sel50 << SEL50_SHIFT) | (sel100 << SEL100_SHIFT);
+ regmap_update_bits(sdhci_am654->base, PHY_CTRL5, mask,
+ val);
+ } else {
+ switch (clock) {
+ case 200000000:
+ freqsel = 0x0;
+ break;
+ default:
+ freqsel = 0x4;
+ }
+
+ regmap_update_bits(sdhci_am654->base, PHY_CTRL5,
+ FREQSEL_MASK,
+ freqsel << FREQSEL_SHIFT);
}
- /* Configure PHY DLL frequency */
- mask = SEL50_MASK | SEL100_MASK;
- val = (sel50 << SEL50_SHIFT) | (sel100 << SEL100_SHIFT);
- regmap_update_bits(sdhci_am654->base, PHY_CTRL5, mask, val);
/* Configure DLL TRIM */
mask = DLL_TRIM_ICP_MASK;
val = sdhci_am654->trm_icp << DLL_TRIM_ICP_SHIFT;
@@ -196,6 +238,33 @@ static const struct sdhci_pltfm_data sdhci_am654_pdata = {
.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
};
+static const struct sdhci_am654_driver_data sdhci_am654_drvdata = {
+ .pdata = &sdhci_am654_pdata,
+ .flags = IOMUX_PRESENT | FREQSEL_2_BIT | STRBSEL_4_BIT,
+};
+
+struct sdhci_ops sdhci_j721e_8bit_ops = {
+ .get_max_clock = sdhci_pltfm_clk_get_max_clock,
+ .get_timeout_clock = sdhci_pltfm_clk_get_max_clock,
+ .set_uhs_signaling = sdhci_set_uhs_signaling,
+ .set_bus_width = sdhci_set_bus_width,
+ .set_power = sdhci_am654_set_power,
+ .set_clock = sdhci_am654_set_clock,
+ .write_b = sdhci_am654_write_b,
+ .reset = sdhci_reset,
+};
+
+static const struct sdhci_pltfm_data sdhci_j721e_8bit_pdata = {
+ .ops = &sdhci_j721e_8bit_ops,
+ .quirks = SDHCI_QUIRK_INVERTED_WRITE_PROTECT |
+ SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12,
+ .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
+};
+
+static const struct sdhci_am654_driver_data sdhci_j721e_8bit_drvdata = {
+ .pdata = &sdhci_j721e_8bit_pdata,
+};
+
static int sdhci_am654_init(struct sdhci_host *host)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
@@ -221,7 +290,9 @@ static int sdhci_am654_init(struct sdhci_host *host)
}
/* Enable pins by setting IO mux to 0 */
- regmap_update_bits(sdhci_am654->base, PHY_CTRL1, IOMUX_ENABLE_MASK, 0);
+ if (sdhci_am654->flags & IOMUX_PRESENT)
+ regmap_update_bits(sdhci_am654->base, PHY_CTRL1,
+ IOMUX_ENABLE_MASK, 0);
/* Set slot type based on SD or eMMC */
if (host->mmc->caps & MMC_CAP_NONREMOVABLE)
@@ -276,15 +347,31 @@ static int sdhci_am654_get_of_property(struct platform_device *pdev,
return -EINVAL;
}
+ device_property_read_u32(dev, "ti,strobe-sel", &sdhci_am654->strb_sel);
+
sdhci_get_of_property(pdev);
return 0;
}
+static const struct of_device_id sdhci_am654_of_match[] = {
+ {
+ .compatible = "ti,am654-sdhci-5.1",
+ .data = &sdhci_am654_drvdata,
+ },
+ {
+ .compatible = "ti,j721e-sdhci-8bit",
+ .data = &sdhci_j721e_8bit_drvdata,
+ },
+ { /* sentinel */ }
+};
+
static int sdhci_am654_probe(struct platform_device *pdev)
{
+ const struct sdhci_am654_driver_data *drvdata;
struct sdhci_pltfm_host *pltfm_host;
struct sdhci_am654_data *sdhci_am654;
+ const struct of_device_id *match;
struct sdhci_host *host;
struct resource *res;
struct clk *clk_xin;
@@ -292,12 +379,15 @@ static int sdhci_am654_probe(struct platform_device *pdev)
void __iomem *base;
int ret;
- host = sdhci_pltfm_init(pdev, &sdhci_am654_pdata, sizeof(*sdhci_am654));
+ match = of_match_node(sdhci_am654_of_match, pdev->dev.of_node);
+ drvdata = match->data;
+ host = sdhci_pltfm_init(pdev, drvdata->pdata, sizeof(*sdhci_am654));
if (IS_ERR(host))
return PTR_ERR(host);
pltfm_host = sdhci_priv(host);
sdhci_am654 = sdhci_pltfm_priv(pltfm_host);
+ sdhci_am654->flags = drvdata->flags;
clk_xin = devm_clk_get(dev, "clk_xin");
if (IS_ERR(clk_xin)) {
@@ -372,11 +462,6 @@ static int sdhci_am654_remove(struct platform_device *pdev)
return 0;
}
-static const struct of_device_id sdhci_am654_of_match[] = {
- { .compatible = "ti,am654-sdhci-5.1" },
- { /* sentinel */ }
-};
-
static struct platform_driver sdhci_am654_driver = {
.driver = {
.name = "sdhci-am654",
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.