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Subject[RFC PATCH V3 15/21] mmc: sdhci: UHS-II support, modify set_power() to handle vdd2
Date
From: AKASHI Takahiro <takahiro.akashi@linaro.org>

VDD2 is used for powering UHS-II interface.
Modify sdhci_set_power_and_bus_voltage(), sdhci_set_power_noreg()
and sdhci_set_power_noreg() to handle VDD2.

Signed-off-by: Ben Chuang <ben.chuang@genesyslogic.com.tw>
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
---
drivers/mmc/host/sdhci-omap.c | 2 +-
drivers/mmc/host/sdhci-pci-core.c | 4 +--
drivers/mmc/host/sdhci-pxav3.c | 4 +--
drivers/mmc/host/sdhci-xenon.c | 4 +--
drivers/mmc/host/sdhci.c | 42 ++++++++++++++++++++++++-------
drivers/mmc/host/sdhci.h | 9 +++----
6 files changed, 43 insertions(+), 22 deletions(-)

diff --git a/drivers/mmc/host/sdhci-omap.c b/drivers/mmc/host/sdhci-omap.c
index 1ec74c2d5c17..1926585debe5 100644
--- a/drivers/mmc/host/sdhci-omap.c
+++ b/drivers/mmc/host/sdhci-omap.c
@@ -678,7 +678,7 @@ static void sdhci_omap_set_clock(struct sdhci_host *host, unsigned int clock)
}

static void sdhci_omap_set_power(struct sdhci_host *host, unsigned char mode,
- unsigned short vdd)
+ unsigned short vdd, unsigned short vdd2)
{
struct mmc_host *mmc = host->mmc;

diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c
index bb6802448b2f..40f5a24a8982 100644
--- a/drivers/mmc/host/sdhci-pci-core.c
+++ b/drivers/mmc/host/sdhci-pci-core.c
@@ -629,12 +629,12 @@ static int bxt_get_cd(struct mmc_host *mmc)
#define SDHCI_INTEL_PWR_TIMEOUT_UDELAY 100

static void sdhci_intel_set_power(struct sdhci_host *host, unsigned char mode,
- unsigned short vdd)
+ unsigned short vdd, unsigned short vdd2)
{
int cntr;
u8 reg;

- sdhci_set_power(host, mode, vdd);
+ sdhci_set_power(host, mode, vdd, -1);

if (mode == MMC_POWER_OFF)
return;
diff --git a/drivers/mmc/host/sdhci-pxav3.c b/drivers/mmc/host/sdhci-pxav3.c
index e55037ceda73..457e9425339a 100644
--- a/drivers/mmc/host/sdhci-pxav3.c
+++ b/drivers/mmc/host/sdhci-pxav3.c
@@ -298,12 +298,12 @@ static void pxav3_set_uhs_signaling(struct sdhci_host *host, unsigned int uhs)
}

static void pxav3_set_power(struct sdhci_host *host, unsigned char mode,
- unsigned short vdd)
+ unsigned short vdd, unsigned short vdd2)
{
struct mmc_host *mmc = host->mmc;
u8 pwr = host->pwr;

- sdhci_set_power_noreg(host, mode, vdd);
+ sdhci_set_power_noreg(host, mode, vdd, -1);

if (host->pwr == pwr)
return;
diff --git a/drivers/mmc/host/sdhci-xenon.c b/drivers/mmc/host/sdhci-xenon.c
index 4703cd540c7f..2b0ebb91895a 100644
--- a/drivers/mmc/host/sdhci-xenon.c
+++ b/drivers/mmc/host/sdhci-xenon.c
@@ -214,12 +214,12 @@ static void xenon_set_uhs_signaling(struct sdhci_host *host,
}

static void xenon_set_power(struct sdhci_host *host, unsigned char mode,
- unsigned short vdd)
+ unsigned short vdd, unsigned short vdd2)
{
struct mmc_host *mmc = host->mmc;
u8 pwr = host->pwr;

- sdhci_set_power_noreg(host, mode, vdd);
+ sdhci_set_power_noreg(host, mode, vdd, -1);

if (host->pwr == pwr)
return;
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index d38d734ec83f..ca3d4a506e01 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2089,12 +2089,15 @@ void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
EXPORT_SYMBOL_GPL(sdhci_set_clock);

static void sdhci_set_power_reg(struct sdhci_host *host, unsigned char mode,
- unsigned short vdd)
+ unsigned short vdd, unsigned short vdd2)
{
struct mmc_host *mmc = host->mmc;

mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);

+ if (mmc->caps & MMC_CAP_UHS2 && !IS_ERR(mmc->supply.vmmc2))
+ mmc_regulator_set_ocr(mmc, mmc->supply.vmmc2, vdd2);
+
if (mode != MMC_POWER_OFF)
sdhci_writeb(host, SDHCI_POWER_ON, SDHCI_POWER_CONTROL);
else
@@ -2102,7 +2105,7 @@ static void sdhci_set_power_reg(struct sdhci_host *host, unsigned char mode,
}

void sdhci_set_power_noreg(struct sdhci_host *host, unsigned char mode,
- unsigned short vdd)
+ unsigned short vdd, unsigned short vdd2)
{
u8 pwr = 0;

@@ -2133,6 +2136,20 @@ void sdhci_set_power_noreg(struct sdhci_host *host, unsigned char mode,
}
}

+ if (mode != MMC_POWER_OFF) {
+ if (vdd2 != (unsigned short)-1) {
+ switch (1 << vdd2) {
+ case MMC_VDD2_165_195:
+ pwr |= SDHCI_VDD2_POWER_180;
+ break;
+ default:
+ WARN(1, "%s: Invalid vdd2 %#x\n",
+ mmc_hostname(host->mmc), vdd2);
+ break;
+ }
+ }
+ }
+
if (host->pwr == pwr)
return;

@@ -2159,7 +2176,13 @@ void sdhci_set_power_noreg(struct sdhci_host *host, unsigned char mode,
sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);

pwr |= SDHCI_POWER_ON;
+ if (vdd2 != (unsigned short)-1)
+ pwr |= SDHCI_VDD2_POWER_ON;
+
+ sdhci_writeb(host, pwr & 0xf, SDHCI_POWER_CONTROL);
+ mdelay(5);
sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
+ mdelay(5);

if (host->quirks2 & SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON)
sdhci_runtime_pm_bus_on(host);
@@ -2175,12 +2198,12 @@ void sdhci_set_power_noreg(struct sdhci_host *host, unsigned char mode,
EXPORT_SYMBOL_GPL(sdhci_set_power_noreg);

void sdhci_set_power(struct sdhci_host *host, unsigned char mode,
- unsigned short vdd)
+ unsigned short vdd, unsigned short vdd2)
{
if (IS_ERR(host->mmc->supply.vmmc))
- sdhci_set_power_noreg(host, mode, vdd);
+ sdhci_set_power_noreg(host, mode, vdd, vdd2);
else
- sdhci_set_power_reg(host, mode, vdd);
+ sdhci_set_power_reg(host, mode, vdd, vdd2);
}
EXPORT_SYMBOL_GPL(sdhci_set_power);

@@ -2192,14 +2215,15 @@ EXPORT_SYMBOL_GPL(sdhci_set_power);
*/
void sdhci_set_power_and_bus_voltage(struct sdhci_host *host,
unsigned char mode,
- unsigned short vdd)
+ unsigned short vdd,
+ unsigned short vdd2)
{
if (!IS_ERR(host->mmc->supply.vmmc)) {
struct mmc_host *mmc = host->mmc;

mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);
}
- sdhci_set_power_noreg(host, mode, vdd);
+ sdhci_set_power_noreg(host, mode, vdd, -1);
}
EXPORT_SYMBOL_GPL(sdhci_set_power_and_bus_voltage);

@@ -2377,9 +2401,9 @@ void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
}

if (host->ops->set_power)
- host->ops->set_power(host, ios->power_mode, ios->vdd);
+ host->ops->set_power(host, ios->power_mode, ios->vdd, -1);
else
- sdhci_set_power(host, ios->power_mode, ios->vdd);
+ sdhci_set_power(host, ios->power_mode, ios->vdd, -1);

/* 4.0 host support */
if (host->version >= SDHCI_SPEC_400) {
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index ecf55394ea46..f6732f33f29f 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -689,7 +689,7 @@ struct sdhci_ops {

void (*set_clock)(struct sdhci_host *host, unsigned int clock);
void (*set_power)(struct sdhci_host *host, unsigned char mode,
- unsigned short vdd);
+ unsigned short vdd, unsigned short vdd2);

u32 (*irq)(struct sdhci_host *host, u32 intmask);

@@ -852,13 +852,10 @@ u16 sdhci_calc_clk(struct sdhci_host *host, unsigned int clock,
unsigned int *actual_clock);
void sdhci_set_clock(struct sdhci_host *host, unsigned int clock);
void sdhci_enable_clk(struct sdhci_host *host, u16 clk);
-void sdhci_set_power(struct sdhci_host *host, unsigned char mode,
- unsigned short vdd);
void sdhci_set_power_and_bus_voltage(struct sdhci_host *host,
unsigned char mode,
- unsigned short vdd);
-void sdhci_set_power_noreg(struct sdhci_host *host, unsigned char mode,
- unsigned short vdd);
+ unsigned short vdd,
+ unsigned short vdd2);
void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq);
int sdhci_request_atomic(struct mmc_host *mmc, struct mmc_request *mrq);
void sdhci_set_bus_width(struct sdhci_host *host, int width);
--
2.27.0
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