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path: root/drivers/mmc/host/sh_mmcif.c
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Diffstat (limited to 'drivers/mmc/host/sh_mmcif.c')
-rw-r--r--drivers/mmc/host/sh_mmcif.c126
1 files changed, 110 insertions, 16 deletions
diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c
index af97015a2fc7..14f8edbaa195 100644
--- a/drivers/mmc/host/sh_mmcif.c
+++ b/drivers/mmc/host/sh_mmcif.c
@@ -29,6 +29,8 @@
#include <linux/mmc/sh_mmcif.h>
#include <linux/pagemap.h>
#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/spinlock.h>
#define DRIVER_NAME "sh_mmcif"
#define DRIVER_VERSION "2010-04-28"
@@ -153,6 +155,12 @@
#define CLKDEV_MMC_DATA 20000000 /* 20MHz */
#define CLKDEV_INIT 400000 /* 400 KHz */
+enum mmcif_state {
+ STATE_IDLE,
+ STATE_REQUEST,
+ STATE_IOS,
+};
+
struct sh_mmcif_host {
struct mmc_host *mmc;
struct mmc_data *data;
@@ -164,6 +172,9 @@ struct sh_mmcif_host {
long timeout;
void __iomem *addr;
struct completion intr_wait;
+ enum mmcif_state state;
+ spinlock_t lock;
+ bool power;
/* DMA support */
struct dma_chan *chan_rx;
@@ -798,17 +809,31 @@ static void sh_mmcif_stop_cmd(struct sh_mmcif_host *host,
static void sh_mmcif_request(struct mmc_host *mmc, struct mmc_request *mrq)
{
struct sh_mmcif_host *host = mmc_priv(mmc);
+ unsigned long flags;
+
+ spin_lock_irqsave(&host->lock, flags);
+ if (host->state != STATE_IDLE) {
+ spin_unlock_irqrestore(&host->lock, flags);
+ mrq->cmd->error = -EAGAIN;
+ mmc_request_done(mmc, mrq);
+ return;
+ }
+
+ host->state = STATE_REQUEST;
+ spin_unlock_irqrestore(&host->lock, flags);
switch (mrq->cmd->opcode) {
/* MMCIF does not support SD/SDIO command */
case SD_IO_SEND_OP_COND:
case MMC_APP_CMD:
+ host->state = STATE_IDLE;
mrq->cmd->error = -ETIMEDOUT;
mmc_request_done(mmc, mrq);
return;
case MMC_SEND_EXT_CSD: /* = SD_SEND_IF_COND (8) */
if (!mrq->data) {
/* send_if_cond cmd (not support) */
+ host->state = STATE_IDLE;
mrq->cmd->error = -ETIMEDOUT;
mmc_request_done(mmc, mrq);
return;
@@ -830,12 +855,9 @@ static void sh_mmcif_request(struct mmc_host *mmc, struct mmc_request *mrq)
sh_mmcif_start_cmd(host, mrq, mrq->cmd);
host->data = NULL;
- if (mrq->cmd->error != 0) {
- mmc_request_done(mmc, mrq);
- return;
- }
- if (mrq->stop)
+ if (!mrq->cmd->error && mrq->stop)
sh_mmcif_stop_cmd(host, mrq, mrq->stop);
+ host->state = STATE_IDLE;
mmc_request_done(mmc, mrq);
}
@@ -843,15 +865,39 @@ static void sh_mmcif_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
{
struct sh_mmcif_host *host = mmc_priv(mmc);
struct sh_mmcif_plat_data *p = host->pd->dev.platform_data;
+ unsigned long flags;
+
+ spin_lock_irqsave(&host->lock, flags);
+ if (host->state != STATE_IDLE) {
+ spin_unlock_irqrestore(&host->lock, flags);
+ return;
+ }
+
+ host->state = STATE_IOS;
+ spin_unlock_irqrestore(&host->lock, flags);
if (ios->power_mode == MMC_POWER_UP) {
if (p->set_pwr)
p->set_pwr(host->pd, ios->power_mode);
+ if (!host->power) {
+ /* See if we also get DMA */
+ sh_mmcif_request_dma(host, host->pd->dev.platform_data);
+ pm_runtime_get_sync(&host->pd->dev);
+ host->power = true;
+ }
} else if (ios->power_mode == MMC_POWER_OFF || !ios->clock) {
/* clock stop */
sh_mmcif_clock_control(host, 0);
- if (ios->power_mode == MMC_POWER_OFF && p->down_pwr)
- p->down_pwr(host->pd);
+ if (ios->power_mode == MMC_POWER_OFF) {
+ if (host->power) {
+ pm_runtime_put(&host->pd->dev);
+ sh_mmcif_release_dma(host);
+ host->power = false;
+ }
+ if (p->down_pwr)
+ p->down_pwr(host->pd);
+ }
+ host->state = STATE_IDLE;
return;
}
@@ -859,6 +905,7 @@ static void sh_mmcif_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
sh_mmcif_clock_control(host, ios->clock);
host->bus_width = ios->bus_width;
+ host->state = STATE_IDLE;
}
static int sh_mmcif_get_cd(struct mmc_host *mmc)
@@ -925,7 +972,7 @@ static irqreturn_t sh_mmcif_intr(int irq, void *dev_id)
sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, state);
err = 1;
} else {
- dev_dbg(&host->pd->dev, "Not support int\n");
+ dev_dbg(&host->pd->dev, "Unsupported interrupt: 0x%x\n", state);
sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~state);
sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, state);
err = 1;
@@ -996,6 +1043,7 @@ static int __devinit sh_mmcif_probe(struct platform_device *pdev)
host->pd = pdev;
init_completion(&host->intr_wait);
+ spin_lock_init(&host->lock);
mmc->ops = &sh_mmcif_ops;
mmc->f_max = host->clk;
@@ -1020,24 +1068,29 @@ static int __devinit sh_mmcif_probe(struct platform_device *pdev)
sh_mmcif_sync_reset(host);
platform_set_drvdata(pdev, host);
- /* See if we also get DMA */
- sh_mmcif_request_dma(host, pd);
+ pm_runtime_enable(&pdev->dev);
+ host->power = false;
+
+ ret = pm_runtime_resume(&pdev->dev);
+ if (ret < 0)
+ goto clean_up2;
mmc_add_host(mmc);
+ sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL);
+
ret = request_irq(irq[0], sh_mmcif_intr, 0, "sh_mmc:error", host);
if (ret) {
dev_err(&pdev->dev, "request_irq error (sh_mmc:error)\n");
- goto clean_up2;
+ goto clean_up3;
}
ret = request_irq(irq[1], sh_mmcif_intr, 0, "sh_mmc:int", host);
if (ret) {
free_irq(irq[0], host);
dev_err(&pdev->dev, "request_irq error (sh_mmc:int)\n");
- goto clean_up2;
+ goto clean_up3;
}
- sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL);
sh_mmcif_detect(host->mmc);
dev_info(&pdev->dev, "driver version %s\n", DRIVER_VERSION);
@@ -1045,7 +1098,11 @@ static int __devinit sh_mmcif_probe(struct platform_device *pdev)
sh_mmcif_readl(host->addr, MMCIF_CE_VERSION) & 0x0000ffff);
return ret;
+clean_up3:
+ mmc_remove_host(mmc);
+ pm_runtime_suspend(&pdev->dev);
clean_up2:
+ pm_runtime_disable(&pdev->dev);
clk_disable(host->hclk);
clean_up1:
mmc_free_host(mmc);
@@ -1060,14 +1117,14 @@ static int __devexit sh_mmcif_remove(struct platform_device *pdev)
struct sh_mmcif_host *host = platform_get_drvdata(pdev);
int irq[2];
+ pm_runtime_get_sync(&pdev->dev);
+
mmc_remove_host(host->mmc);
- sh_mmcif_release_dma(host);
+ sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL);
if (host->addr)
iounmap(host->addr);
- sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL);
-
irq[0] = platform_get_irq(pdev, 0);
irq[1] = platform_get_irq(pdev, 1);
@@ -1078,15 +1135,52 @@ static int __devexit sh_mmcif_remove(struct platform_device *pdev)
clk_disable(host->hclk);
mmc_free_host(host->mmc);
+ pm_runtime_put_sync(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
return 0;
}
+#ifdef CONFIG_PM
+static int sh_mmcif_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct sh_mmcif_host *host = platform_get_drvdata(pdev);
+ int ret = mmc_suspend_host(host->mmc);
+
+ if (!ret) {
+ sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL);
+ clk_disable(host->hclk);
+ }
+
+ return ret;
+}
+
+static int sh_mmcif_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct sh_mmcif_host *host = platform_get_drvdata(pdev);
+
+ clk_enable(host->hclk);
+
+ return mmc_resume_host(host->mmc);
+}
+#else
+#define sh_mmcif_suspend NULL
+#define sh_mmcif_resume NULL
+#endif /* CONFIG_PM */
+
+static const struct dev_pm_ops sh_mmcif_dev_pm_ops = {
+ .suspend = sh_mmcif_suspend,
+ .resume = sh_mmcif_resume,
+};
+
static struct platform_driver sh_mmcif_driver = {
.probe = sh_mmcif_probe,
.remove = sh_mmcif_remove,
.driver = {
.name = DRIVER_NAME,
+ .pm = &sh_mmcif_dev_pm_ops,
},
};
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-04 14:09:28 +0000