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path: root/drivers/mmc/host/sdhci-tegra.c
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Diffstat (limited to 'drivers/mmc/host/sdhci-tegra.c')
-rw-r--r--drivers/mmc/host/sdhci-tegra.c160
1 files changed, 119 insertions, 41 deletions
diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
index e6ace31e2a41..7d681a8fa4ba 100644
--- a/drivers/mmc/host/sdhci-tegra.c
+++ b/drivers/mmc/host/sdhci-tegra.c
@@ -75,6 +75,7 @@
#define SDHCI_TEGRA_SDMEM_COMP_PADCTRL_VREF_SEL_MASK 0x0000000f
#define SDHCI_TEGRA_SDMEM_COMP_PADCTRL_VREF_SEL_VAL 0x7
#define SDHCI_TEGRA_SDMEM_COMP_PADCTRL_E_INPUT_E_PWRD BIT(31)
+#define SDHCI_COMP_PADCTRL_DRVUPDN_OFFSET_MASK 0x07FFF000
#define SDHCI_TEGRA_AUTO_CAL_STATUS 0x1ec
#define SDHCI_TEGRA_AUTO_CAL_ACTIVE BIT(31)
@@ -121,6 +122,8 @@ struct sdhci_tegra {
struct pinctrl *pinctrl_sdmmc;
struct pinctrl_state *pinctrl_state_3v3;
struct pinctrl_state *pinctrl_state_1v8;
+ struct pinctrl_state *pinctrl_state_3v3_drv;
+ struct pinctrl_state *pinctrl_state_1v8_drv;
struct sdhci_tegra_autocal_offsets autocal_offsets;
ktime_t last_calib;
@@ -411,6 +414,76 @@ static void tegra_sdhci_set_pad_autocal_offset(struct sdhci_host *host,
sdhci_writel(host, reg, SDHCI_TEGRA_AUTO_CAL_CONFIG);
}
+static int tegra_sdhci_set_padctrl(struct sdhci_host *host, int voltage,
+ bool state_drvupdn)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_tegra *tegra_host = sdhci_pltfm_priv(pltfm_host);
+ struct sdhci_tegra_autocal_offsets *offsets =
+ &tegra_host->autocal_offsets;
+ struct pinctrl_state *pinctrl_drvupdn = NULL;
+ int ret = 0;
+ u8 drvup = 0, drvdn = 0;
+ u32 reg;
+
+ if (!state_drvupdn) {
+ /* PADS Drive Strength */
+ if (voltage == MMC_SIGNAL_VOLTAGE_180) {
+ if (tegra_host->pinctrl_state_1v8_drv) {
+ pinctrl_drvupdn =
+ tegra_host->pinctrl_state_1v8_drv;
+ } else {
+ drvup = offsets->pull_up_1v8_timeout;
+ drvdn = offsets->pull_down_1v8_timeout;
+ }
+ } else {
+ if (tegra_host->pinctrl_state_3v3_drv) {
+ pinctrl_drvupdn =
+ tegra_host->pinctrl_state_3v3_drv;
+ } else {
+ drvup = offsets->pull_up_3v3_timeout;
+ drvdn = offsets->pull_down_3v3_timeout;
+ }
+ }
+
+ if (pinctrl_drvupdn != NULL) {
+ ret = pinctrl_select_state(tegra_host->pinctrl_sdmmc,
+ pinctrl_drvupdn);
+ if (ret < 0)
+ dev_err(mmc_dev(host->mmc),
+ "failed pads drvupdn, ret: %d\n", ret);
+ } else if ((drvup) || (drvdn)) {
+ reg = sdhci_readl(host,
+ SDHCI_TEGRA_SDMEM_COMP_PADCTRL);
+ reg &= ~SDHCI_COMP_PADCTRL_DRVUPDN_OFFSET_MASK;
+ reg |= (drvup << 20) | (drvdn << 12);
+ sdhci_writel(host, reg,
+ SDHCI_TEGRA_SDMEM_COMP_PADCTRL);
+ }
+
+ } else {
+ /* Dual Voltage PADS Voltage selection */
+ if (!tegra_host->pad_control_available)
+ return 0;
+
+ if (voltage == MMC_SIGNAL_VOLTAGE_180) {
+ ret = pinctrl_select_state(tegra_host->pinctrl_sdmmc,
+ tegra_host->pinctrl_state_1v8);
+ if (ret < 0)
+ dev_err(mmc_dev(host->mmc),
+ "setting 1.8V failed, ret: %d\n", ret);
+ } else {
+ ret = pinctrl_select_state(tegra_host->pinctrl_sdmmc,
+ tegra_host->pinctrl_state_3v3);
+ if (ret < 0)
+ dev_err(mmc_dev(host->mmc),
+ "setting 3.3V failed, ret: %d\n", ret);
+ }
+ }
+
+ return ret;
+}
+
static void tegra_sdhci_pad_autocalib(struct sdhci_host *host)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
@@ -437,6 +510,7 @@ static void tegra_sdhci_pad_autocalib(struct sdhci_host *host)
pdpu = offsets.pull_down_3v3 << 8 | offsets.pull_up_3v3;
}
+ /* Set initial offset before auto-calibration */
tegra_sdhci_set_pad_autocal_offset(host, pdpu);
card_clk_enabled = tegra_sdhci_configure_card_clk(host, false);
@@ -460,19 +534,15 @@ static void tegra_sdhci_pad_autocalib(struct sdhci_host *host)
if (ret) {
dev_err(mmc_dev(host->mmc), "Pad autocal timed out\n");
- if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180)
- pdpu = offsets.pull_down_1v8_timeout << 8 |
- offsets.pull_up_1v8_timeout;
- else
- pdpu = offsets.pull_down_3v3_timeout << 8 |
- offsets.pull_up_3v3_timeout;
-
- /* Disable automatic calibration and use fixed offsets */
+ /* Disable automatic cal and use fixed Drive Strengths */
reg = sdhci_readl(host, SDHCI_TEGRA_AUTO_CAL_CONFIG);
reg &= ~SDHCI_AUTO_CAL_ENABLE;
sdhci_writel(host, reg, SDHCI_TEGRA_AUTO_CAL_CONFIG);
- tegra_sdhci_set_pad_autocal_offset(host, pdpu);
+ ret = tegra_sdhci_set_padctrl(host, ios->signal_voltage, false);
+ if (ret < 0)
+ dev_err(mmc_dev(host->mmc),
+ "Setting drive strengths failed: %d\n", ret);
}
}
@@ -511,26 +581,46 @@ static void tegra_sdhci_parse_pad_autocal_dt(struct sdhci_host *host)
err = device_property_read_u32(host->mmc->parent,
"nvidia,pad-autocal-pull-up-offset-3v3-timeout",
&autocal->pull_up_3v3_timeout);
- if (err)
+ if (err) {
+ if (!IS_ERR(tegra_host->pinctrl_state_3v3) &&
+ (tegra_host->pinctrl_state_3v3_drv == NULL))
+ pr_warn("%s: Missing autocal timeout 3v3-pad drvs\n",
+ mmc_hostname(host->mmc));
autocal->pull_up_3v3_timeout = 0;
+ }
err = device_property_read_u32(host->mmc->parent,
"nvidia,pad-autocal-pull-down-offset-3v3-timeout",
&autocal->pull_down_3v3_timeout);
- if (err)
+ if (err) {
+ if (!IS_ERR(tegra_host->pinctrl_state_3v3) &&
+ (tegra_host->pinctrl_state_3v3_drv == NULL))
+ pr_warn("%s: Missing autocal timeout 3v3-pad drvs\n",
+ mmc_hostname(host->mmc));
autocal->pull_down_3v3_timeout = 0;
+ }
err = device_property_read_u32(host->mmc->parent,
"nvidia,pad-autocal-pull-up-offset-1v8-timeout",
&autocal->pull_up_1v8_timeout);
- if (err)
+ if (err) {
+ if (!IS_ERR(tegra_host->pinctrl_state_1v8) &&
+ (tegra_host->pinctrl_state_1v8_drv == NULL))
+ pr_warn("%s: Missing autocal timeout 1v8-pad drvs\n",
+ mmc_hostname(host->mmc));
autocal->pull_up_1v8_timeout = 0;
+ }
err = device_property_read_u32(host->mmc->parent,
"nvidia,pad-autocal-pull-down-offset-1v8-timeout",
&autocal->pull_down_1v8_timeout);
- if (err)
+ if (err) {
+ if (!IS_ERR(tegra_host->pinctrl_state_1v8) &&
+ (tegra_host->pinctrl_state_1v8_drv == NULL))
+ pr_warn("%s: Missing autocal timeout 1v8-pad drvs\n",
+ mmc_hostname(host->mmc));
autocal->pull_down_1v8_timeout = 0;
+ }
err = device_property_read_u32(host->mmc->parent,
"nvidia,pad-autocal-pull-up-offset-sdr104",
@@ -743,32 +833,6 @@ static int tegra_sdhci_execute_tuning(struct sdhci_host *host, u32 opcode)
return mmc_send_tuning(host->mmc, opcode, NULL);
}
-static int tegra_sdhci_set_padctrl(struct sdhci_host *host, int voltage)
-{
- struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
- struct sdhci_tegra *tegra_host = sdhci_pltfm_priv(pltfm_host);
- int ret;
-
- if (!tegra_host->pad_control_available)
- return 0;
-
- if (voltage == MMC_SIGNAL_VOLTAGE_180) {
- ret = pinctrl_select_state(tegra_host->pinctrl_sdmmc,
- tegra_host->pinctrl_state_1v8);
- if (ret < 0)
- dev_err(mmc_dev(host->mmc),
- "setting 1.8V failed, ret: %d\n", ret);
- } else {
- ret = pinctrl_select_state(tegra_host->pinctrl_sdmmc,
- tegra_host->pinctrl_state_3v3);
- if (ret < 0)
- dev_err(mmc_dev(host->mmc),
- "setting 3.3V failed, ret: %d\n", ret);
- }
-
- return ret;
-}
-
static int sdhci_tegra_start_signal_voltage_switch(struct mmc_host *mmc,
struct mmc_ios *ios)
{
@@ -778,7 +842,7 @@ static int sdhci_tegra_start_signal_voltage_switch(struct mmc_host *mmc,
int ret = 0;
if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
- ret = tegra_sdhci_set_padctrl(host, ios->signal_voltage);
+ ret = tegra_sdhci_set_padctrl(host, ios->signal_voltage, true);
if (ret < 0)
return ret;
ret = sdhci_start_signal_voltage_switch(mmc, ios);
@@ -786,7 +850,7 @@ static int sdhci_tegra_start_signal_voltage_switch(struct mmc_host *mmc,
ret = sdhci_start_signal_voltage_switch(mmc, ios);
if (ret < 0)
return ret;
- ret = tegra_sdhci_set_padctrl(host, ios->signal_voltage);
+ ret = tegra_sdhci_set_padctrl(host, ios->signal_voltage, true);
}
if (tegra_host->pad_calib_required)
@@ -805,6 +869,20 @@ static int tegra_sdhci_init_pinctrl_info(struct device *dev,
return -1;
}
+ tegra_host->pinctrl_state_1v8_drv = pinctrl_lookup_state(
+ tegra_host->pinctrl_sdmmc, "sdmmc-1v8-drv");
+ if (IS_ERR(tegra_host->pinctrl_state_1v8_drv)) {
+ if (PTR_ERR(tegra_host->pinctrl_state_1v8_drv) == -ENODEV)
+ tegra_host->pinctrl_state_1v8_drv = NULL;
+ }
+
+ tegra_host->pinctrl_state_3v3_drv = pinctrl_lookup_state(
+ tegra_host->pinctrl_sdmmc, "sdmmc-3v3-drv");
+ if (IS_ERR(tegra_host->pinctrl_state_3v3_drv)) {
+ if (PTR_ERR(tegra_host->pinctrl_state_3v3_drv) == -ENODEV)
+ tegra_host->pinctrl_state_3v3_drv = NULL;
+ }
+
tegra_host->pinctrl_state_3v3 =
pinctrl_lookup_state(tegra_host->pinctrl_sdmmc, "sdmmc-3v3");
if (IS_ERR(tegra_host->pinctrl_state_3v3)) {
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-24 23:51:58 +0000