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path: root/drivers/mmc/host/sdhci.c
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Diffstat (limited to 'drivers/mmc/host/sdhci.c')
-rw-r--r--drivers/mmc/host/sdhci.c144
1 files changed, 88 insertions, 56 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index f4b8b4db3a9a..9a11dc39921c 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -27,6 +27,7 @@
#include <linux/mmc/mmc.h>
#include <linux/mmc/host.h>
+#include <linux/mmc/card.h>
#include "sdhci.h"
@@ -244,6 +245,19 @@ static void sdhci_init(struct sdhci_host *host, int soft)
static void sdhci_reinit(struct sdhci_host *host)
{
sdhci_init(host, 0);
+ /*
+ * Retuning stuffs are affected by different cards inserted and only
+ * applicable to UHS-I cards. So reset these fields to their initial
+ * value when card is removed.
+ */
+ if (host->flags & SDHCI_USING_RETUNING_TIMER) {
+ host->flags &= ~SDHCI_USING_RETUNING_TIMER;
+
+ del_timer_sync(&host->tuning_timer);
+ host->flags &= ~SDHCI_NEEDS_RETUNING;
+ host->mmc->max_blk_count =
+ (host->quirks & SDHCI_QUIRK_NO_MULTIBLOCK) ? 1 : 65535;
+ }
sdhci_enable_card_detection(host);
}
@@ -1245,6 +1259,7 @@ static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
struct sdhci_host *host;
bool present;
unsigned long flags;
+ u32 tuning_opcode;
host = mmc_priv(mmc);
@@ -1292,8 +1307,12 @@ static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
*/
if ((host->flags & SDHCI_NEEDS_RETUNING) &&
!(present_state & (SDHCI_DOING_WRITE | SDHCI_DOING_READ))) {
+ /* eMMC uses cmd21 while sd and sdio use cmd19 */
+ tuning_opcode = mmc->card->type == MMC_TYPE_MMC ?
+ MMC_SEND_TUNING_BLOCK_HS200 :
+ MMC_SEND_TUNING_BLOCK;
spin_unlock_irqrestore(&host->lock, flags);
- sdhci_execute_tuning(mmc, mrq->cmd->opcode);
+ sdhci_execute_tuning(mmc, tuning_opcode);
spin_lock_irqsave(&host->lock, flags);
/* Restore original mmc_request structure */
@@ -1663,11 +1682,15 @@ static int sdhci_do_start_signal_voltage_switch(struct sdhci_host *host,
pwr = sdhci_readb(host, SDHCI_POWER_CONTROL);
pwr &= ~SDHCI_POWER_ON;
sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
+ if (host->vmmc)
+ regulator_disable(host->vmmc);
/* Wait for 1ms as per the spec */
usleep_range(1000, 1500);
pwr |= SDHCI_POWER_ON;
sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
+ if (host->vmmc)
+ regulator_enable(host->vmmc);
pr_info(DRIVER_NAME ": Switching to 1.8V signalling "
"voltage failed, retrying with S18R set to 0\n");
@@ -1855,6 +1878,7 @@ out:
*/
if (!(host->flags & SDHCI_NEEDS_RETUNING) && host->tuning_count &&
(host->tuning_mode == SDHCI_TUNING_MODE_1)) {
+ host->flags |= SDHCI_USING_RETUNING_TIMER;
mod_timer(&host->tuning_timer, jiffies +
host->tuning_count * HZ);
/* Tuning mode 1 limits the maximum data length to 4MB */
@@ -1872,10 +1896,10 @@ out:
* try tuning again at a later time, when the re-tuning timer expires.
* So for these controllers, we return 0. Since there might be other
* controllers who do not have this capability, we return error for
- * them.
+ * them. SDHCI_USING_RETUNING_TIMER means the host is currently using
+ * a retuning timer to do the retuning for the card.
*/
- if (err && host->tuning_count &&
- host->tuning_mode == SDHCI_TUNING_MODE_1)
+ if (err && (host->flags & SDHCI_USING_RETUNING_TIMER))
err = 0;
sdhci_clear_set_irqs(host, SDHCI_INT_DATA_AVAIL, ier);
@@ -2382,7 +2406,6 @@ out:
int sdhci_suspend_host(struct sdhci_host *host)
{
int ret;
- bool has_tuning_timer;
if (host->ops->platform_suspend)
host->ops->platform_suspend(host);
@@ -2390,16 +2413,14 @@ int sdhci_suspend_host(struct sdhci_host *host)
sdhci_disable_card_detection(host);
/* Disable tuning since we are suspending */
- has_tuning_timer = host->version >= SDHCI_SPEC_300 &&
- host->tuning_count && host->tuning_mode == SDHCI_TUNING_MODE_1;
- if (has_tuning_timer) {
+ if (host->flags & SDHCI_USING_RETUNING_TIMER) {
del_timer_sync(&host->tuning_timer);
host->flags &= ~SDHCI_NEEDS_RETUNING;
}
ret = mmc_suspend_host(host->mmc);
if (ret) {
- if (has_tuning_timer) {
+ if (host->flags & SDHCI_USING_RETUNING_TIMER) {
host->flags |= SDHCI_NEEDS_RETUNING;
mod_timer(&host->tuning_timer, jiffies +
host->tuning_count * HZ);
@@ -2450,8 +2471,7 @@ int sdhci_resume_host(struct sdhci_host *host)
host->ops->platform_resume(host);
/* Set the re-tuning expiration flag */
- if ((host->version >= SDHCI_SPEC_300) && host->tuning_count &&
- (host->tuning_mode == SDHCI_TUNING_MODE_1))
+ if (host->flags & SDHCI_USING_RETUNING_TIMER)
host->flags |= SDHCI_NEEDS_RETUNING;
return ret;
@@ -2490,8 +2510,7 @@ int sdhci_runtime_suspend_host(struct sdhci_host *host)
int ret = 0;
/* Disable tuning since we are suspending */
- if (host->version >= SDHCI_SPEC_300 &&
- host->tuning_mode == SDHCI_TUNING_MODE_1) {
+ if (host->flags & SDHCI_USING_RETUNING_TIMER) {
del_timer_sync(&host->tuning_timer);
host->flags &= ~SDHCI_NEEDS_RETUNING;
}
@@ -2532,8 +2551,7 @@ int sdhci_runtime_resume_host(struct sdhci_host *host)
sdhci_do_enable_preset_value(host, true);
/* Set the re-tuning expiration flag */
- if ((host->version >= SDHCI_SPEC_300) && host->tuning_count &&
- (host->tuning_mode == SDHCI_TUNING_MODE_1))
+ if (host->flags & SDHCI_USING_RETUNING_TIMER)
host->flags |= SDHCI_NEEDS_RETUNING;
spin_lock_irqsave(&host->lock, flags);
@@ -2584,7 +2602,7 @@ EXPORT_SYMBOL_GPL(sdhci_alloc_host);
int sdhci_add_host(struct sdhci_host *host)
{
struct mmc_host *mmc;
- u32 caps[2];
+ u32 caps[2] = {0, 0};
u32 max_current_caps;
unsigned int ocr_avail;
int ret;
@@ -2614,8 +2632,10 @@ int sdhci_add_host(struct sdhci_host *host)
caps[0] = (host->quirks & SDHCI_QUIRK_MISSING_CAPS) ? host->caps :
sdhci_readl(host, SDHCI_CAPABILITIES);
- caps[1] = (host->version >= SDHCI_SPEC_300) ?
- sdhci_readl(host, SDHCI_CAPABILITIES_1) : 0;
+ if (host->version >= SDHCI_SPEC_300)
+ caps[1] = (host->quirks & SDHCI_QUIRK_MISSING_CAPS) ?
+ host->caps1 :
+ sdhci_readl(host, SDHCI_CAPABILITIES_1);
if (host->quirks & SDHCI_QUIRK_FORCE_DMA)
host->flags |= SDHCI_USE_SDMA;
@@ -2779,7 +2799,7 @@ int sdhci_add_host(struct sdhci_host *host)
mmc->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED;
if ((host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) &&
- mmc_card_is_removable(mmc))
+ !(host->mmc->caps & MMC_CAP_NONREMOVABLE))
mmc->caps |= MMC_CAP_NEEDS_POLL;
/* Any UHS-I mode in caps implies SDR12 and SDR25 support. */
@@ -2837,6 +2857,30 @@ int sdhci_add_host(struct sdhci_host *host)
SDHCI_RETUNING_MODE_SHIFT;
ocr_avail = 0;
+
+ host->vmmc = regulator_get(mmc_dev(mmc), "vmmc");
+ if (IS_ERR(host->vmmc)) {
+ pr_info("%s: no vmmc regulator found\n", mmc_hostname(mmc));
+ host->vmmc = NULL;
+ }
+
+#ifdef CONFIG_REGULATOR
+ if (host->vmmc) {
+ ret = regulator_is_supported_voltage(host->vmmc, 3300000,
+ 3300000);
+ if ((ret <= 0) || (!(caps[0] & SDHCI_CAN_VDD_330)))
+ caps[0] &= ~SDHCI_CAN_VDD_330;
+ ret = regulator_is_supported_voltage(host->vmmc, 3000000,
+ 3000000);
+ if ((ret <= 0) || (!(caps[0] & SDHCI_CAN_VDD_300)))
+ caps[0] &= ~SDHCI_CAN_VDD_300;
+ ret = regulator_is_supported_voltage(host->vmmc, 1800000,
+ 1800000);
+ if ((ret <= 0) || (!(caps[0] & SDHCI_CAN_VDD_180)))
+ caps[0] &= ~SDHCI_CAN_VDD_180;
+ }
+#endif /* CONFIG_REGULATOR */
+
/*
* According to SD Host Controller spec v3.00, if the Host System
* can afford more than 150mA, Host Driver should set XPC to 1. Also
@@ -2845,55 +2889,45 @@ int sdhci_add_host(struct sdhci_host *host)
* value.
*/
max_current_caps = sdhci_readl(host, SDHCI_MAX_CURRENT);
+ if (!max_current_caps && host->vmmc) {
+ u32 curr = regulator_get_current_limit(host->vmmc);
+ if (curr > 0) {
+
+ /* convert to SDHCI_MAX_CURRENT format */
+ curr = curr/1000; /* convert to mA */
+ curr = curr/SDHCI_MAX_CURRENT_MULTIPLIER;
+
+ curr = min_t(u32, curr, SDHCI_MAX_CURRENT_LIMIT);
+ max_current_caps =
+ (curr << SDHCI_MAX_CURRENT_330_SHIFT) |
+ (curr << SDHCI_MAX_CURRENT_300_SHIFT) |
+ (curr << SDHCI_MAX_CURRENT_180_SHIFT);
+ }
+ }
if (caps[0] & SDHCI_CAN_VDD_330) {
- int max_current_330;
-
ocr_avail |= MMC_VDD_32_33 | MMC_VDD_33_34;
- max_current_330 = ((max_current_caps &
+ mmc->max_current_330 = ((max_current_caps &
SDHCI_MAX_CURRENT_330_MASK) >>
SDHCI_MAX_CURRENT_330_SHIFT) *
SDHCI_MAX_CURRENT_MULTIPLIER;
-
- if (max_current_330 > 150)
- mmc->caps |= MMC_CAP_SET_XPC_330;
}
if (caps[0] & SDHCI_CAN_VDD_300) {
- int max_current_300;
-
ocr_avail |= MMC_VDD_29_30 | MMC_VDD_30_31;
- max_current_300 = ((max_current_caps &
+ mmc->max_current_300 = ((max_current_caps &
SDHCI_MAX_CURRENT_300_MASK) >>
SDHCI_MAX_CURRENT_300_SHIFT) *
SDHCI_MAX_CURRENT_MULTIPLIER;
-
- if (max_current_300 > 150)
- mmc->caps |= MMC_CAP_SET_XPC_300;
}
if (caps[0] & SDHCI_CAN_VDD_180) {
- int max_current_180;
-
ocr_avail |= MMC_VDD_165_195;
- max_current_180 = ((max_current_caps &
+ mmc->max_current_180 = ((max_current_caps &
SDHCI_MAX_CURRENT_180_MASK) >>
SDHCI_MAX_CURRENT_180_SHIFT) *
SDHCI_MAX_CURRENT_MULTIPLIER;
-
- if (max_current_180 > 150)
- mmc->caps |= MMC_CAP_SET_XPC_180;
-
- /* Maximum current capabilities of the host at 1.8V */
- if (max_current_180 >= 800)
- mmc->caps |= MMC_CAP_MAX_CURRENT_800;
- else if (max_current_180 >= 600)
- mmc->caps |= MMC_CAP_MAX_CURRENT_600;
- else if (max_current_180 >= 400)
- mmc->caps |= MMC_CAP_MAX_CURRENT_400;
- else
- mmc->caps |= MMC_CAP_MAX_CURRENT_200;
}
mmc->ocr_avail = ocr_avail;
@@ -2992,13 +3026,10 @@ int sdhci_add_host(struct sdhci_host *host)
ret = request_irq(host->irq, sdhci_irq, IRQF_SHARED,
mmc_hostname(mmc), host);
- if (ret)
+ if (ret) {
+ pr_err("%s: Failed to request IRQ %d: %d\n",
+ mmc_hostname(mmc), host->irq, ret);
goto untasklet;
-
- host->vmmc = regulator_get(mmc_dev(mmc), "vmmc");
- if (IS_ERR(host->vmmc)) {
- pr_info("%s: no vmmc regulator found\n", mmc_hostname(mmc));
- host->vmmc = NULL;
}
sdhci_init(host, 0);
@@ -3016,8 +3047,11 @@ int sdhci_add_host(struct sdhci_host *host)
host->led.brightness_set = sdhci_led_control;
ret = led_classdev_register(mmc_dev(mmc), &host->led);
- if (ret)
+ if (ret) {
+ pr_err("%s: Failed to register LED device: %d\n",
+ mmc_hostname(mmc), ret);
goto reset;
+ }
#endif
mmiowb();
@@ -3081,8 +3115,6 @@ void sdhci_remove_host(struct sdhci_host *host, int dead)
free_irq(host->irq, host);
del_timer_sync(&host->timer);
- if (host->version >= SDHCI_SPEC_300)
- del_timer_sync(&host->tuning_timer);
tasklet_kill(&host->card_tasklet);
tasklet_kill(&host->finish_tasklet);