[PATCH V22 15/22] mmc: sdhci-uhs2: add set_ios()
From: Victor Shih
Date: Fri Sep 13 2024 - 06:33:24 EST
From: Victor Shih <victor.shih@xxxxxxxxxxxxxxxxxxx>
This is a sdhci version of mmc's set_ios operation.
This is used to handle basic IO bus setting.
It covers both UHS-I and UHS-II.
Signed-off-by: Ben Chuang <ben.chuang@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: AKASHI Takahiro <takahiro.akashi@xxxxxxxxxx>
Signed-off-by: Victor Shih <victor.shih@xxxxxxxxxxxxxxxxxxx>
---
Updates in V22:
- Adjust the patch order from v21 patch#14 to v22 patch#15 and
add necessary code to avoid defined but not used warnings.
Updates in V14:
- Use mmc_card_uhs2() to stead sdhci_uhs2_mode() in the
sdhci_uhs2_set_ios().
Updates in V13:
- Add judgment condition for power mode in the __sdhci_uhs2_set_ios().
- Modify comment message.
Updates in V9:
- Simplity the turning_on_clk in sdhci_set_ios().
Updates in V8:
- Add the judgment formula for MMC_TIMING_SPEED_A_HD, MMC_TIMING_SPEED_B
and MMC_TIMING_SPEED_B_HD in __sdhci_uhs2_set_ios().
- Add the switch case for MMC_TIMING_SPEED_A_HD, MMC_TIMING_SPEED_B
and MMC_TIMING_SPEED_B_HD in sdhci_get_preset_value().
- mmc_opt_regulator_set_ocr() to instead of mmc_regulator_set_ocr()
in sdhci_uhs2_set_ios().
Updates in V7:
- Remove unnecessary functions.
Updates in V6:
- Modify return value in some functions.
- Remove unnecessary functions.
---
drivers/mmc/host/sdhci-uhs2.c | 128 ++++++++++++++++++++++++++++++++++
drivers/mmc/host/sdhci-uhs2.h | 1 +
drivers/mmc/host/sdhci.c | 55 +++++++++------
drivers/mmc/host/sdhci.h | 2 +
4 files changed, 165 insertions(+), 21 deletions(-)
diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c
index d3af620c7b68..ee46dac891e5 100644
--- a/drivers/mmc/host/sdhci-uhs2.c
+++ b/drivers/mmc/host/sdhci-uhs2.c
@@ -208,12 +208,136 @@ void sdhci_uhs2_set_timeout(struct sdhci_host *host, struct mmc_command *cmd)
}
EXPORT_SYMBOL_GPL(sdhci_uhs2_set_timeout);
+/**
+ * sdhci_uhs2_clear_set_irqs - set Error Interrupt Status Enable register
+ * @host: SDHCI host
+ * @clear: bit-wise clear mask
+ * @set: bit-wise set mask
+ *
+ * Set/unset bits in UHS-II Error Interrupt Status Enable register
+ */
+void sdhci_uhs2_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set)
+{
+ u32 ier;
+
+ ier = sdhci_readl(host, SDHCI_UHS2_INT_STATUS_ENABLE);
+ ier &= ~clear;
+ ier |= set;
+ sdhci_writel(host, ier, SDHCI_UHS2_INT_STATUS_ENABLE);
+ sdhci_writel(host, ier, SDHCI_UHS2_INT_SIGNAL_ENABLE);
+}
+EXPORT_SYMBOL_GPL(sdhci_uhs2_clear_set_irqs);
+
+static void __sdhci_uhs2_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+ u8 cmd_res, dead_lock;
+ u16 ctrl_2;
+
+ /* UHS2 Timeout Control */
+ sdhci_calc_timeout_uhs2(host, &cmd_res, &dead_lock);
+
+ /* change to use calculate value */
+ cmd_res |= FIELD_PREP(SDHCI_UHS2_TIMER_CTRL_DEADLOCK_MASK, dead_lock);
+
+ sdhci_uhs2_clear_set_irqs(host,
+ SDHCI_UHS2_INT_CMD_TIMEOUT |
+ SDHCI_UHS2_INT_DEADLOCK_TIMEOUT,
+ 0);
+ sdhci_writeb(host, cmd_res, SDHCI_UHS2_TIMER_CTRL);
+ sdhci_uhs2_clear_set_irqs(host, 0,
+ SDHCI_UHS2_INT_CMD_TIMEOUT |
+ SDHCI_UHS2_INT_DEADLOCK_TIMEOUT);
+
+ /* UHS2 timing. Note, UHS2 timing is disabled when powering off */
+ ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+ if (ios->power_mode != MMC_POWER_OFF &&
+ (ios->timing == MMC_TIMING_UHS2_SPEED_A ||
+ ios->timing == MMC_TIMING_UHS2_SPEED_A_HD ||
+ ios->timing == MMC_TIMING_UHS2_SPEED_B ||
+ ios->timing == MMC_TIMING_UHS2_SPEED_B_HD))
+ ctrl_2 |= SDHCI_CTRL_UHS2 | SDHCI_CTRL_UHS2_ENABLE;
+ else
+ ctrl_2 &= ~(SDHCI_CTRL_UHS2 | SDHCI_CTRL_UHS2_ENABLE);
+ sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
+ host->timing = ios->timing;
+
+ if (!(host->quirks2 & SDHCI_QUIRK2_PRESET_VALUE_BROKEN))
+ sdhci_enable_preset_value(host, true);
+
+ if (host->ops->set_power)
+ host->ops->set_power(host, ios->power_mode, ios->vdd);
+ else
+ sdhci_uhs2_set_power(host, ios->power_mode, ios->vdd);
+
+ sdhci_set_clock(host, host->clock);
+}
+
+static int sdhci_uhs2_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+
+ pr_debug("%s: clock %uHz powermode %u Vdd %u timing %u\n",
+ mmc_hostname(mmc), ios->clock, ios->power_mode, ios->vdd, ios->timing);
+
+ if (!mmc_card_uhs2(mmc)) {
+ sdhci_set_ios(mmc, ios);
+ return 0;
+ }
+
+ if (ios->power_mode == MMC_POWER_UNDEFINED)
+ return 0;
+
+ if (host->flags & SDHCI_DEVICE_DEAD) {
+ if (ios->power_mode == MMC_POWER_OFF) {
+ mmc_opt_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
+ mmc_regulator_set_vqmmc2(mmc, ios);
+ }
+ return -1;
+ }
+
+ sdhci_set_ios_common(mmc, ios);
+
+ __sdhci_uhs2_set_ios(mmc, ios);
+
+ return 0;
+}
+
+static int sdhci_uhs2_control(struct mmc_host *mmc, enum sd_uhs2_operation op)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+ struct mmc_ios *ios = &mmc->ios;
+ int err = 0;
+
+ DBG("Begin uhs2 control, act %d.\n", op);
+
+ switch (op) {
+ case UHS2_SET_IOS:
+ err = sdhci_uhs2_set_ios(mmc, ios);
+ break;
+ default:
+ pr_err("%s: input sd uhs2 operation %d is wrong!\n",
+ mmc_hostname(host->mmc), op);
+ err = -EIO;
+ break;
+ }
+
+ return err;
+}
+
/*****************************************************************************\
* *
* Driver init/exit *
* *
\*****************************************************************************/
+static int sdhci_uhs2_host_ops_init(struct sdhci_host *host)
+{
+ host->mmc_host_ops.uhs2_control = sdhci_uhs2_control;
+
+ return 0;
+}
+
static int __init sdhci_uhs2_mod_init(void)
{
return 0;
@@ -288,6 +412,10 @@ int sdhci_uhs2_add_host(struct sdhci_host *host)
/* host doesn't want to enable UHS2 support */
mmc->caps2 &= ~MMC_CAP2_SD_UHS2;
+ /* overwrite ops */
+ if (mmc->caps2 & MMC_CAP2_SD_UHS2)
+ sdhci_uhs2_host_ops_init(host);
+
/* LED support not implemented for UHS2 */
host->quirks |= SDHCI_QUIRK_NO_LED;
diff --git a/drivers/mmc/host/sdhci-uhs2.h b/drivers/mmc/host/sdhci-uhs2.h
index 0e1866a6bdb6..14713a31f8a5 100644
--- a/drivers/mmc/host/sdhci-uhs2.h
+++ b/drivers/mmc/host/sdhci-uhs2.h
@@ -183,5 +183,6 @@ void sdhci_uhs2_set_power(struct sdhci_host *host, unsigned char mode, unsigned
void sdhci_uhs2_set_timeout(struct sdhci_host *host, struct mmc_command *cmd);
int sdhci_uhs2_add_host(struct sdhci_host *host);
void sdhci_uhs2_remove_host(struct sdhci_host *host, int dead);
+void sdhci_uhs2_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set);
#endif /* __SDHCI_UHS2_H */
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 366c3d30dba6..63fa1714930a 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -47,8 +47,6 @@
static unsigned int debug_quirks = 0;
static unsigned int debug_quirks2;
-static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable);
-
static bool sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd);
void sdhci_dumpregs(struct sdhci_host *host)
@@ -1877,6 +1875,12 @@ static u16 sdhci_get_preset_value(struct sdhci_host *host)
case MMC_TIMING_MMC_HS400:
preset = sdhci_readw(host, SDHCI_PRESET_FOR_HS400);
break;
+ case MMC_TIMING_UHS2_SPEED_A:
+ case MMC_TIMING_UHS2_SPEED_A_HD:
+ case MMC_TIMING_UHS2_SPEED_B:
+ case MMC_TIMING_UHS2_SPEED_B_HD:
+ preset = sdhci_readw(host, SDHCI_PRESET_FOR_UHS2);
+ break;
default:
pr_warn("%s: Invalid UHS-I mode selected\n",
mmc_hostname(host->mmc));
@@ -2323,24 +2327,9 @@ static bool sdhci_presetable_values_change(struct sdhci_host *host, struct mmc_i
(sdhci_preset_needed(host, ios->timing) || host->drv_type != ios->drv_type);
}
-void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+void sdhci_set_ios_common(struct mmc_host *mmc, struct mmc_ios *ios)
{
struct sdhci_host *host = mmc_priv(mmc);
- bool reinit_uhs = host->reinit_uhs;
- bool turning_on_clk = false;
- u8 ctrl;
-
- host->reinit_uhs = false;
-
- if (ios->power_mode == MMC_POWER_UNDEFINED)
- return;
-
- if (host->flags & SDHCI_DEVICE_DEAD) {
- if (!IS_ERR(mmc->supply.vmmc) &&
- ios->power_mode == MMC_POWER_OFF)
- mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
- return;
- }
/*
* Reset the chip on each power off.
@@ -2357,8 +2346,6 @@ void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
sdhci_enable_preset_value(host, false);
if (!ios->clock || ios->clock != host->clock) {
- turning_on_clk = ios->clock && !host->clock;
-
host->ops->set_clock(host, ios->clock);
host->clock = ios->clock;
@@ -2374,6 +2361,31 @@ void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
mmc->max_busy_timeout /= host->timeout_clk;
}
}
+}
+EXPORT_SYMBOL_GPL(sdhci_set_ios_common);
+
+void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+ bool reinit_uhs = host->reinit_uhs;
+ bool turning_on_clk;
+ u8 ctrl;
+
+ host->reinit_uhs = false;
+
+ if (ios->power_mode == MMC_POWER_UNDEFINED)
+ return;
+
+ if (host->flags & SDHCI_DEVICE_DEAD) {
+ if (!IS_ERR(mmc->supply.vmmc) &&
+ ios->power_mode == MMC_POWER_OFF)
+ mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
+ return;
+ }
+
+ turning_on_clk = ios->clock != host->clock && ios->clock && !host->clock;
+
+ sdhci_set_ios_common(mmc, ios);
if (host->ops->set_power)
host->ops->set_power(host, ios->power_mode, ios->vdd);
@@ -2942,7 +2954,7 @@ int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode)
}
EXPORT_SYMBOL_GPL(sdhci_execute_tuning);
-static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable)
+void sdhci_enable_preset_value(struct sdhci_host *host, bool enable)
{
/* Host Controller v3.00 defines preset value registers */
if (host->version < SDHCI_SPEC_300)
@@ -2970,6 +2982,7 @@ static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable)
host->preset_enabled = enable;
}
}
+EXPORT_SYMBOL_GPL(sdhci_enable_preset_value);
static void sdhci_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
int err)
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 0f78708d0c70..5c66927210bd 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -848,6 +848,8 @@ void sdhci_reset(struct sdhci_host *host, u8 mask);
void sdhci_set_uhs_signaling(struct sdhci_host *host, unsigned timing);
int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode);
int __sdhci_execute_tuning(struct sdhci_host *host, u32 opcode);
+void sdhci_enable_preset_value(struct sdhci_host *host, bool enable);
+void sdhci_set_ios_common(struct mmc_host *mmc, struct mmc_ios *ios);
void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios);
int sdhci_start_signal_voltage_switch(struct mmc_host *mmc,
struct mmc_ios *ios);
--
2.25.1