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path: root/drivers/mmc/host/omap_hsmmc.c
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Diffstat (limited to 'drivers/mmc/host/omap_hsmmc.c')
-rw-r--r--drivers/mmc/host/omap_hsmmc.c112
1 files changed, 32 insertions, 80 deletions
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 6ac63df645c4..dbd32ad3b749 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -75,6 +75,7 @@
#define ICE 0x1
#define ICS 0x2
#define CEN (1 << 2)
+#define CLKD_MAX 0x3FF /* max clock divisor: 1023 */
#define CLKD_MASK 0x0000FFC0
#define CLKD_SHIFT 6
#define DTO_MASK 0x000F0000
@@ -119,7 +120,8 @@
BRR_EN | BWR_EN | TC_EN | CC_EN)
#define MMC_AUTOSUSPEND_DELAY 100
-#define MMC_TIMEOUT_MS 20
+#define MMC_TIMEOUT_MS 20 /* 20 mSec */
+#define MMC_TIMEOUT_US 20000 /* 20000 micro Sec */
#define OMAP_MMC_MIN_CLOCK 400000
#define OMAP_MMC_MAX_CLOCK 52000000
#define DRIVER_NAME "omap_hsmmc"
@@ -171,6 +173,10 @@ struct omap_hsmmc_host {
unsigned char bus_mode;
unsigned char power_mode;
int suspended;
+ u32 con;
+ u32 hctl;
+ u32 sysctl;
+ u32 capa;
int irq;
int use_dma, dma_ch;
struct dma_chan *tx_chan;
@@ -183,7 +189,6 @@ struct omap_hsmmc_host {
int use_reg;
int req_in_progress;
struct omap_hsmmc_next next_data;
-
struct omap_mmc_platform_data *pdata;
};
@@ -493,8 +498,8 @@ static u16 calc_divisor(struct omap_hsmmc_host *host, struct mmc_ios *ios)
if (ios->clock) {
dsor = DIV_ROUND_UP(clk_get_rate(host->fclk), ios->clock);
- if (dsor > 250)
- dsor = 250;
+ if (dsor > CLKD_MAX)
+ dsor = CLKD_MAX;
}
return dsor;
@@ -597,25 +602,20 @@ static void omap_hsmmc_set_bus_mode(struct omap_hsmmc_host *host)
static int omap_hsmmc_context_restore(struct omap_hsmmc_host *host)
{
struct mmc_ios *ios = &host->mmc->ios;
- struct omap_mmc_platform_data *pdata = host->pdata;
- int context_loss = 0;
u32 hctl, capa;
unsigned long timeout;
- if (pdata->get_context_loss_count) {
- context_loss = pdata->get_context_loss_count(host->dev);
- if (context_loss < 0)
- return 1;
- }
-
- dev_dbg(mmc_dev(host->mmc), "context was %slost\n",
- context_loss == host->context_loss ? "not " : "");
- if (host->context_loss == context_loss)
- return 1;
-
if (!OMAP_HSMMC_READ(host->base, SYSSTATUS) & RESETDONE)
return 1;
+ if (host->con == OMAP_HSMMC_READ(host->base, CON) &&
+ host->hctl == OMAP_HSMMC_READ(host->base, HCTL) &&
+ host->sysctl == OMAP_HSMMC_READ(host->base, SYSCTL) &&
+ host->capa == OMAP_HSMMC_READ(host->base, CAPA))
+ return 0;
+
+ host->context_loss++;
+
if (host->pdata->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) {
if (host->power_mode != MMC_POWER_OFF &&
(1 << ios->vdd) <= MMC_VDD_23_24)
@@ -655,9 +655,8 @@ static int omap_hsmmc_context_restore(struct omap_hsmmc_host *host)
omap_hsmmc_set_bus_mode(host);
out:
- host->context_loss = context_loss;
-
- dev_dbg(mmc_dev(host->mmc), "context is restored\n");
+ dev_dbg(mmc_dev(host->mmc), "context is restored: restore count %d\n",
+ host->context_loss);
return 0;
}
@@ -666,15 +665,10 @@ out:
*/
static void omap_hsmmc_context_save(struct omap_hsmmc_host *host)
{
- struct omap_mmc_platform_data *pdata = host->pdata;
- int context_loss;
-
- if (pdata->get_context_loss_count) {
- context_loss = pdata->get_context_loss_count(host->dev);
- if (context_loss < 0)
- return;
- host->context_loss = context_loss;
- }
+ host->con = OMAP_HSMMC_READ(host->base, CON);
+ host->hctl = OMAP_HSMMC_READ(host->base, HCTL);
+ host->sysctl = OMAP_HSMMC_READ(host->base, SYSCTL);
+ host->capa = OMAP_HSMMC_READ(host->base, CAPA);
}
#else
@@ -975,8 +969,7 @@ static inline void omap_hsmmc_reset_controller_fsm(struct omap_hsmmc_host *host,
unsigned long bit)
{
unsigned long i = 0;
- unsigned long limit = (loops_per_jiffy *
- msecs_to_jiffies(MMC_TIMEOUT_MS));
+ unsigned long limit = MMC_TIMEOUT_US;
OMAP_HSMMC_WRITE(host->base, SYSCTL,
OMAP_HSMMC_READ(host->base, SYSCTL) | bit);
@@ -988,13 +981,13 @@ static inline void omap_hsmmc_reset_controller_fsm(struct omap_hsmmc_host *host,
if (mmc_slot(host).features & HSMMC_HAS_UPDATED_RESET) {
while ((!(OMAP_HSMMC_READ(host->base, SYSCTL) & bit))
&& (i++ < limit))
- cpu_relax();
+ udelay(1);
}
i = 0;
while ((OMAP_HSMMC_READ(host->base, SYSCTL) & bit) &&
(i++ < limit))
- cpu_relax();
+ udelay(1);
if (OMAP_HSMMC_READ(host->base, SYSCTL) & bit)
dev_err(mmc_dev(host->mmc),
@@ -1178,9 +1171,6 @@ static irqreturn_t omap_hsmmc_detect(int irq, void *dev_id)
struct omap_mmc_slot_data *slot = &mmc_slot(host);
int carddetect;
- if (host->suspended)
- return IRQ_HANDLED;
-
sysfs_notify(&host->mmc->class_dev.kobj, NULL, "cover_switch");
if (slot->card_detect)
@@ -1635,18 +1625,9 @@ static int omap_hsmmc_regs_show(struct seq_file *s, void *data)
{
struct mmc_host *mmc = s->private;
struct omap_hsmmc_host *host = mmc_priv(mmc);
- int context_loss = 0;
-
- if (host->pdata->get_context_loss_count)
- context_loss = host->pdata->get_context_loss_count(host->dev);
- seq_printf(s, "mmc%d:\n ctx_loss:\t%d:%d\n\nregs:\n",
- mmc->index, host->context_loss, context_loss);
-
- if (host->suspended) {
- seq_printf(s, "host suspended, can't read registers\n");
- return 0;
- }
+ seq_printf(s, "mmc%d:\n ctx_loss:\t%d\n\nregs:\n",
+ mmc->index, host->context_loss);
pm_runtime_get_sync(host->dev);
@@ -1838,13 +1819,6 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
mmc->ops = &omap_hsmmc_ops;
- /*
- * If regulator_disable can only put vcc_aux to sleep then there is
- * no off state.
- */
- if (mmc_slot(host).vcc_aux_disable_is_sleep)
- mmc_slot(host).no_off = 1;
-
mmc->f_min = OMAP_MMC_MIN_CLOCK;
if (pdata->max_freq > 0)
@@ -1874,7 +1848,7 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
omap_hsmmc_context_save(host);
/* This can be removed once we support PBIAS with DT */
- if (host->dev->of_node && host->mapbase == 0x4809c000)
+ if (host->dev->of_node && res->start == 0x4809c000)
host->pbias_disable = 1;
host->dbclk = clk_get(&pdev->dev, "mmchsdb_fck");
@@ -2119,23 +2093,12 @@ static void omap_hsmmc_complete(struct device *dev)
static int omap_hsmmc_suspend(struct device *dev)
{
- int ret = 0;
struct omap_hsmmc_host *host = dev_get_drvdata(dev);
if (!host)
return 0;
- if (host && host->suspended)
- return 0;
-
pm_runtime_get_sync(host->dev);
- host->suspended = 1;
- ret = mmc_suspend_host(host->mmc);
-
- if (ret) {
- host->suspended = 0;
- goto err;
- }
if (!(host->mmc->pm_flags & MMC_PM_KEEP_POWER)) {
omap_hsmmc_disable_irq(host);
@@ -2145,23 +2108,19 @@ static int omap_hsmmc_suspend(struct device *dev)
if (host->dbclk)
clk_disable_unprepare(host->dbclk);
-err:
+
pm_runtime_put_sync(host->dev);
- return ret;
+ return 0;
}
/* Routine to resume the MMC device */
static int omap_hsmmc_resume(struct device *dev)
{
- int ret = 0;
struct omap_hsmmc_host *host = dev_get_drvdata(dev);
if (!host)
return 0;
- if (host && !host->suspended)
- return 0;
-
pm_runtime_get_sync(host->dev);
if (host->dbclk)
@@ -2172,16 +2131,9 @@ static int omap_hsmmc_resume(struct device *dev)
omap_hsmmc_protect_card(host);
- /* Notify the core to resume the host */
- ret = mmc_resume_host(host->mmc);
- if (ret == 0)
- host->suspended = 0;
-
pm_runtime_mark_last_busy(host->dev);
pm_runtime_put_autosuspend(host->dev);
-
- return ret;
-
+ return 0;
}
#else
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