#include <linux/delay.h>
#include <linux/highmem.h>
#include <linux/io.h>
+#include <linux/module.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <linux/scatterlist.h>
#include <linux/regulator/consumer.h>
+#include <linux/pm_runtime.h>
#include <linux/leds.h>
#define MAX_TUNING_LOOP 40
static unsigned int debug_quirks = 0;
+static unsigned int debug_quirks2;
static void sdhci_finish_data(struct sdhci_host *);
static int sdhci_execute_tuning(struct mmc_host *mmc);
static void sdhci_tuning_timer(unsigned long data);
+#ifdef CONFIG_PM_RUNTIME
+static int sdhci_runtime_pm_get(struct sdhci_host *host);
+static int sdhci_runtime_pm_put(struct sdhci_host *host);
+#else
+static inline int sdhci_runtime_pm_get(struct sdhci_host *host)
+{
+ return 0;
+}
+static inline int sdhci_runtime_pm_put(struct sdhci_host *host)
+{
+ return 0;
+}
+#endif
+
static void sdhci_dumpregs(struct sdhci_host *host)
{
printk(KERN_DEBUG DRIVER_NAME ": =========== REGISTER DUMP (%s)===========\n",
if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION)
return;
+ if (host->quirks2 & SDHCI_QUIRK2_OWN_CARD_DETECTION)
+ return;
+
present = sdhci_readl(host, SDHCI_PRESENT_STATE) &
SDHCI_CARD_PRESENT;
irqs = present ? SDHCI_INT_CARD_REMOVE : SDHCI_INT_CARD_INSERT;
spin_lock_irqsave(&host->lock, flags);
+ if (host->runtime_suspended)
+ goto out;
+
if (brightness == LED_OFF)
sdhci_deactivate_led(host);
else
sdhci_activate_led(host);
-
+out:
spin_unlock_irqrestore(&host->lock, flags);
}
#endif
host = mmc_priv(mmc);
+ sdhci_runtime_pm_get(host);
+
spin_lock_irqsave(&host->lock, flags);
WARN_ON(host->mrq != NULL);
spin_unlock_irqrestore(&host->lock, flags);
}
-static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+static void sdhci_do_set_ios(struct sdhci_host *host, struct mmc_ios *ios)
{
- struct sdhci_host *host;
unsigned long flags;
u8 ctrl;
- host = mmc_priv(mmc);
-
spin_lock_irqsave(&host->lock, flags);
if (host->flags & SDHCI_DEVICE_DEAD)
spin_unlock_irqrestore(&host->lock, flags);
}
-static int check_ro(struct sdhci_host *host)
+static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+
+ sdhci_runtime_pm_get(host);
+ sdhci_do_set_ios(host, ios);
+ sdhci_runtime_pm_put(host);
+}
+
+static int sdhci_check_ro(struct sdhci_host *host)
{
unsigned long flags;
int is_readonly;
#define SAMPLE_COUNT 5
-static int sdhci_get_ro(struct mmc_host *mmc)
+static int sdhci_do_get_ro(struct sdhci_host *host)
{
- struct sdhci_host *host;
int i, ro_count;
- host = mmc_priv(mmc);
-
if (!(host->quirks & SDHCI_QUIRK_UNSTABLE_RO_DETECT))
- return check_ro(host);
+ return sdhci_check_ro(host);
ro_count = 0;
for (i = 0; i < SAMPLE_COUNT; i++) {
- if (check_ro(host)) {
+ if (sdhci_check_ro(host)) {
if (++ro_count > SAMPLE_COUNT / 2)
return 1;
}
return 0;
}
-static void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable)
+static void sdhci_hw_reset(struct mmc_host *mmc)
{
- struct sdhci_host *host;
- unsigned long flags;
+ struct sdhci_host *host = mmc_priv(mmc);
- host = mmc_priv(mmc);
+ if (host->ops && host->ops->hw_reset)
+ host->ops->hw_reset(host);
+}
- spin_lock_irqsave(&host->lock, flags);
+static int sdhci_get_ro(struct mmc_host *mmc)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+ int ret;
+ sdhci_runtime_pm_get(host);
+ ret = sdhci_do_get_ro(host);
+ sdhci_runtime_pm_put(host);
+ return ret;
+}
+
+static void sdhci_enable_sdio_irq_nolock(struct sdhci_host *host, int enable)
+{
if (host->flags & SDHCI_DEVICE_DEAD)
goto out;
+ if (enable)
+ host->flags |= SDHCI_SDIO_IRQ_ENABLED;
+ else
+ host->flags &= ~SDHCI_SDIO_IRQ_ENABLED;
+
+ /* SDIO IRQ will be enabled as appropriate in runtime resume */
+ if (host->runtime_suspended)
+ goto out;
+
if (enable)
sdhci_unmask_irqs(host, SDHCI_INT_CARD_INT);
else
sdhci_mask_irqs(host, SDHCI_INT_CARD_INT);
out:
mmiowb();
+}
+static void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+ unsigned long flags;
+
+ spin_lock_irqsave(&host->lock, flags);
+ sdhci_enable_sdio_irq_nolock(host, enable);
spin_unlock_irqrestore(&host->lock, flags);
}
-static int sdhci_start_signal_voltage_switch(struct mmc_host *mmc,
- struct mmc_ios *ios)
+static int sdhci_do_start_signal_voltage_switch(struct sdhci_host *host,
+ struct mmc_ios *ios)
{
- struct sdhci_host *host;
u8 pwr;
u16 clk, ctrl;
u32 present_state;
- host = mmc_priv(mmc);
-
/*
* Signal Voltage Switching is only applicable for Host Controllers
* v3.00 and above.
return 0;
}
+static int sdhci_start_signal_voltage_switch(struct mmc_host *mmc,
+ struct mmc_ios *ios)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+ int err;
+
+ if (host->version < SDHCI_SPEC_300)
+ return 0;
+ sdhci_runtime_pm_get(host);
+ err = sdhci_do_start_signal_voltage_switch(host, ios);
+ sdhci_runtime_pm_put(host);
+ return err;
+}
+
static int sdhci_execute_tuning(struct mmc_host *mmc)
{
struct sdhci_host *host;
host = mmc_priv(mmc);
+ sdhci_runtime_pm_get(host);
disable_irq(host->irq);
spin_lock(&host->lock);
else {
spin_unlock(&host->lock);
enable_irq(host->irq);
+ sdhci_runtime_pm_put(host);
return 0;
}
timeout = 150;
do {
struct mmc_command cmd = {0};
- struct mmc_request mrq = {0};
+ struct mmc_request mrq = {NULL};
if (!tuning_loop_counter && !timeout)
break;
sdhci_clear_set_irqs(host, SDHCI_INT_DATA_AVAIL, ier);
spin_unlock(&host->lock);
enable_irq(host->irq);
+ sdhci_runtime_pm_put(host);
return err;
}
-static void sdhci_enable_preset_value(struct mmc_host *mmc, bool enable)
+static void sdhci_do_enable_preset_value(struct sdhci_host *host, bool enable)
{
- struct sdhci_host *host;
u16 ctrl;
unsigned long flags;
- host = mmc_priv(mmc);
-
/* Host Controller v3.00 defines preset value registers */
if (host->version < SDHCI_SPEC_300)
return;
if (enable && !(ctrl & SDHCI_CTRL_PRESET_VAL_ENABLE)) {
ctrl |= SDHCI_CTRL_PRESET_VAL_ENABLE;
sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
+ host->flags |= SDHCI_PV_ENABLED;
} else if (!enable && (ctrl & SDHCI_CTRL_PRESET_VAL_ENABLE)) {
ctrl &= ~SDHCI_CTRL_PRESET_VAL_ENABLE;
sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
+ host->flags &= ~SDHCI_PV_ENABLED;
}
spin_unlock_irqrestore(&host->lock, flags);
}
+static void sdhci_enable_preset_value(struct mmc_host *mmc, bool enable)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+
+ sdhci_runtime_pm_get(host);
+ sdhci_do_enable_preset_value(host, enable);
+ sdhci_runtime_pm_put(host);
+}
+
static const struct mmc_host_ops sdhci_ops = {
.request = sdhci_request,
.set_ios = sdhci_set_ios,
.get_ro = sdhci_get_ro,
+ .hw_reset = sdhci_hw_reset,
.enable_sdio_irq = sdhci_enable_sdio_irq,
.start_signal_voltage_switch = sdhci_start_signal_voltage_switch,
.execute_tuning = sdhci_execute_tuning,
spin_lock_irqsave(&host->lock, flags);
- if (!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
- if (host->mrq) {
- printk(KERN_ERR "%s: Card removed during transfer!\n",
- mmc_hostname(host->mmc));
- printk(KERN_ERR "%s: Resetting controller.\n",
- mmc_hostname(host->mmc));
+ /* Check host->mrq first in case we are runtime suspended */
+ if (host->mrq &&
+ !(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
+ printk(KERN_ERR "%s: Card removed during transfer!\n",
+ mmc_hostname(host->mmc));
+ printk(KERN_ERR "%s: Resetting controller.\n",
+ mmc_hostname(host->mmc));
- sdhci_reset(host, SDHCI_RESET_CMD);
- sdhci_reset(host, SDHCI_RESET_DATA);
+ sdhci_reset(host, SDHCI_RESET_CMD);
+ sdhci_reset(host, SDHCI_RESET_DATA);
- host->mrq->cmd->error = -ENOMEDIUM;
- tasklet_schedule(&host->finish_tasklet);
- }
+ host->mrq->cmd->error = -ENOMEDIUM;
+ tasklet_schedule(&host->finish_tasklet);
}
spin_unlock_irqrestore(&host->lock, flags);
host = (struct sdhci_host*)param;
+ spin_lock_irqsave(&host->lock, flags);
+
/*
* If this tasklet gets rescheduled while running, it will
* be run again afterwards but without any active request.
*/
- if (!host->mrq)
+ if (!host->mrq) {
+ spin_unlock_irqrestore(&host->lock, flags);
return;
-
- spin_lock_irqsave(&host->lock, flags);
+ }
del_timer(&host->timer);
spin_unlock_irqrestore(&host->lock, flags);
mmc_request_done(host->mmc, mrq);
+ sdhci_runtime_pm_put(host);
}
static void sdhci_timeout_timer(unsigned long data)
static irqreturn_t sdhci_irq(int irq, void *dev_id)
{
irqreturn_t result;
- struct sdhci_host* host = dev_id;
+ struct sdhci_host *host = dev_id;
u32 intmask;
int cardint = 0;
spin_lock(&host->lock);
+ if (host->runtime_suspended) {
+ spin_unlock(&host->lock);
+ printk(KERN_WARNING "%s: got irq while runtime suspended\n",
+ mmc_hostname(host->mmc));
+ return IRQ_HANDLED;
+ }
+
intmask = sdhci_readl(host, SDHCI_INT_STATUS);
if (!intmask || intmask == 0xffffffff) {
return ret;
}
-
if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) {
if (host->ops->enable_dma)
host->ops->enable_dma(host);
#endif /* CONFIG_PM */
+#ifdef CONFIG_PM_RUNTIME
+
+static int sdhci_runtime_pm_get(struct sdhci_host *host)
+{
+ return pm_runtime_get_sync(host->mmc->parent);
+}
+
+static int sdhci_runtime_pm_put(struct sdhci_host *host)
+{
+ pm_runtime_mark_last_busy(host->mmc->parent);
+ return pm_runtime_put_autosuspend(host->mmc->parent);
+}
+
+int sdhci_runtime_suspend_host(struct sdhci_host *host)
+{
+ unsigned long flags;
+ int ret = 0;
+
+ /* Disable tuning since we are suspending */
+ if (host->version >= SDHCI_SPEC_300 &&
+ host->tuning_mode == SDHCI_TUNING_MODE_1) {
+ del_timer_sync(&host->tuning_timer);
+ host->flags &= ~SDHCI_NEEDS_RETUNING;
+ }
+
+ spin_lock_irqsave(&host->lock, flags);
+ sdhci_mask_irqs(host, SDHCI_INT_ALL_MASK);
+ spin_unlock_irqrestore(&host->lock, flags);
+
+ synchronize_irq(host->irq);
+
+ spin_lock_irqsave(&host->lock, flags);
+ host->runtime_suspended = true;
+ spin_unlock_irqrestore(&host->lock, flags);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(sdhci_runtime_suspend_host);
+
+int sdhci_runtime_resume_host(struct sdhci_host *host)
+{
+ unsigned long flags;
+ int ret = 0, host_flags = host->flags;
+
+ if (host_flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) {
+ if (host->ops->enable_dma)
+ host->ops->enable_dma(host);
+ }
+
+ sdhci_init(host, 0);
+
+ /* Force clock and power re-program */
+ host->pwr = 0;
+ host->clock = 0;
+ sdhci_do_set_ios(host, &host->mmc->ios);
+
+ sdhci_do_start_signal_voltage_switch(host, &host->mmc->ios);
+ if (host_flags & SDHCI_PV_ENABLED)
+ 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))
+ host->flags |= SDHCI_NEEDS_RETUNING;
+
+ spin_lock_irqsave(&host->lock, flags);
+
+ host->runtime_suspended = false;
+
+ /* Enable SDIO IRQ */
+ if ((host->flags & SDHCI_SDIO_IRQ_ENABLED))
+ sdhci_enable_sdio_irq_nolock(host, true);
+
+ /* Enable Card Detection */
+ sdhci_enable_card_detection(host);
+
+ spin_unlock_irqrestore(&host->lock, flags);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(sdhci_runtime_resume_host);
+
+#endif
+
/*****************************************************************************\
* *
* Device allocation/registration *
if (debug_quirks)
host->quirks = debug_quirks;
+ if (debug_quirks2)
+ host->quirks2 = debug_quirks2;
sdhci_reset(host, SDHCI_RESET_ALL);
module_exit(sdhci_drv_exit);
module_param(debug_quirks, uint, 0444);
+module_param(debug_quirks2, uint, 0444);
MODULE_AUTHOR("Pierre Ossman <pierre@ossman.eu>");
MODULE_DESCRIPTION("Secure Digital Host Controller Interface core driver");
MODULE_LICENSE("GPL");
MODULE_PARM_DESC(debug_quirks, "Force certain quirks.");
+MODULE_PARM_DESC(debug_quirks2, "Force certain other quirks.");
git.openpandora.org / pandora-kernel.git / blobdiff