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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.c117
1 files changed, 46 insertions, 71 deletions
diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c
index 3f49273..74e7aca 100644
--- a/drivers/mmc/host/sh_mmcif.c
+++ b/drivers/mmc/host/sh_mmcif.c
@@ -16,6 +16,8 @@
*
*/
+#include <linux/clk.h>
+#include <linux/completion.h>
#include <linux/dma-mapping.h>
#include <linux/mmc/host.h>
#include <linux/mmc/card.h>
@@ -24,7 +26,6 @@
#include <linux/mmc/sdio.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
-#include <linux/clk.h>
#include <linux/mmc/sh_mmcif.h>
#define DRIVER_NAME "sh_mmcif"
@@ -158,11 +159,10 @@ struct sh_mmcif_host {
struct clk *hclk;
unsigned int clk;
int bus_width;
- u16 wait_int;
- u16 sd_error;
+ bool sd_error;
long timeout;
void __iomem *addr;
- wait_queue_head_t intr_wait;
+ struct completion intr_wait;
};
@@ -216,8 +216,7 @@ static int sh_mmcif_error_manage(struct sh_mmcif_host *host)
u32 state1, state2;
int ret, timeout = 10000000;
- host->sd_error = 0;
- host->wait_int = 0;
+ host->sd_error = false;
state1 = sh_mmcif_readl(host->addr, MMCIF_CE_HOST_STS1);
state2 = sh_mmcif_readl(host->addr, MMCIF_CE_HOST_STS2);
@@ -264,17 +263,13 @@ static int sh_mmcif_single_read(struct sh_mmcif_host *host,
long time;
u32 blocksize, i, *p = sg_virt(data->sg);
- host->wait_int = 0;
-
/* buf read enable */
sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFREN);
- time = wait_event_interruptible_timeout(host->intr_wait,
- host->wait_int == 1 ||
- host->sd_error == 1, host->timeout);
- if (host->wait_int != 1 && (time == 0 || host->sd_error != 0))
+ time = wait_for_completion_interruptible_timeout(&host->intr_wait,
+ host->timeout);
+ if (time <= 0 || host->sd_error)
return sh_mmcif_error_manage(host);
- host->wait_int = 0;
blocksize = (BLOCK_SIZE_MASK &
sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET)) + 3;
for (i = 0; i < blocksize / 4; i++)
@@ -282,13 +277,11 @@ static int sh_mmcif_single_read(struct sh_mmcif_host *host,
/* buffer read end */
sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFRE);
- time = wait_event_interruptible_timeout(host->intr_wait,
- host->wait_int == 1 ||
- host->sd_error == 1, host->timeout);
- if (host->wait_int != 1 && (time == 0 || host->sd_error != 0))
+ time = wait_for_completion_interruptible_timeout(&host->intr_wait,
+ host->timeout);
+ if (time <= 0 || host->sd_error)
return sh_mmcif_error_manage(host);
- host->wait_int = 0;
return 0;
}
@@ -303,19 +296,15 @@ static int sh_mmcif_multi_read(struct sh_mmcif_host *host,
MMCIF_CE_BLOCK_SET);
for (j = 0; j < data->sg_len; j++) {
p = sg_virt(data->sg);
- host->wait_int = 0;
for (sec = 0; sec < data->sg->length / blocksize; sec++) {
sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFREN);
/* buf read enable */
- time = wait_event_interruptible_timeout(host->intr_wait,
- host->wait_int == 1 ||
- host->sd_error == 1, host->timeout);
+ time = wait_for_completion_interruptible_timeout(&host->intr_wait,
+ host->timeout);
- if (host->wait_int != 1 &&
- (time == 0 || host->sd_error != 0))
+ if (time <= 0 || host->sd_error)
return sh_mmcif_error_manage(host);
- host->wait_int = 0;
for (i = 0; i < blocksize / 4; i++)
*p++ = sh_mmcif_readl(host->addr,
MMCIF_CE_DATA);
@@ -333,17 +322,14 @@ static int sh_mmcif_single_write(struct sh_mmcif_host *host,
long time;
u32 blocksize, i, *p = sg_virt(data->sg);
- host->wait_int = 0;
sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN);
/* buf write enable */
- time = wait_event_interruptible_timeout(host->intr_wait,
- host->wait_int == 1 ||
- host->sd_error == 1, host->timeout);
- if (host->wait_int != 1 && (time == 0 || host->sd_error != 0))
+ time = wait_for_completion_interruptible_timeout(&host->intr_wait,
+ host->timeout);
+ if (time <= 0 || host->sd_error)
return sh_mmcif_error_manage(host);
- host->wait_int = 0;
blocksize = (BLOCK_SIZE_MASK &
sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET)) + 3;
for (i = 0; i < blocksize / 4; i++)
@@ -352,13 +338,11 @@ static int sh_mmcif_single_write(struct sh_mmcif_host *host,
/* buffer write end */
sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MDTRANE);
- time = wait_event_interruptible_timeout(host->intr_wait,
- host->wait_int == 1 ||
- host->sd_error == 1, host->timeout);
- if (host->wait_int != 1 && (time == 0 || host->sd_error != 0))
+ time = wait_for_completion_interruptible_timeout(&host->intr_wait,
+ host->timeout);
+ if (time <= 0 || host->sd_error)
return sh_mmcif_error_manage(host);
- host->wait_int = 0;
return 0;
}
@@ -374,19 +358,15 @@ static int sh_mmcif_multi_write(struct sh_mmcif_host *host,
for (j = 0; j < data->sg_len; j++) {
p = sg_virt(data->sg);
- host->wait_int = 0;
for (sec = 0; sec < data->sg->length / blocksize; sec++) {
sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN);
/* buf write enable*/
- time = wait_event_interruptible_timeout(host->intr_wait,
- host->wait_int == 1 ||
- host->sd_error == 1, host->timeout);
+ time = wait_for_completion_interruptible_timeout(&host->intr_wait,
+ host->timeout);
- if (host->wait_int != 1 &&
- (time == 0 || host->sd_error != 0))
+ if (time <= 0 || host->sd_error)
return sh_mmcif_error_manage(host);
- host->wait_int = 0;
for (i = 0; i < blocksize / 4; i++)
sh_mmcif_writel(host->addr,
MMCIF_CE_DATA, *p++);
@@ -556,13 +536,12 @@ static void sh_mmcif_start_cmd(struct sh_mmcif_host *host,
sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, mask);
/* set arg */
sh_mmcif_writel(host->addr, MMCIF_CE_ARG, cmd->arg);
- host->wait_int = 0;
/* set cmd */
sh_mmcif_writel(host->addr, MMCIF_CE_CMD_SET, opc);
- time = wait_event_interruptible_timeout(host->intr_wait,
- host->wait_int == 1 || host->sd_error == 1, host->timeout);
- if (host->wait_int != 1 && time == 0) {
+ time = wait_for_completion_interruptible_timeout(&host->intr_wait,
+ host->timeout);
+ if (time <= 0) {
cmd->error = sh_mmcif_error_manage(host);
return;
}
@@ -579,19 +558,14 @@ static void sh_mmcif_start_cmd(struct sh_mmcif_host *host,
cmd->error = sh_mmcif_error_manage(host);
break;
}
- host->sd_error = 0;
- host->wait_int = 0;
+ host->sd_error = false;
return;
}
if (!(cmd->flags & MMC_RSP_PRESENT)) {
cmd->error = ret;
- host->wait_int = 0;
return;
}
- if (host->wait_int == 1) {
- sh_mmcif_get_response(host, cmd);
- host->wait_int = 0;
- }
+ sh_mmcif_get_response(host, cmd);
if (host->data) {
ret = sh_mmcif_data_trans(host, mrq, cmd->opcode);
if (ret < 0)
@@ -618,15 +592,13 @@ static void sh_mmcif_stop_cmd(struct sh_mmcif_host *host,
return;
}
- time = wait_event_interruptible_timeout(host->intr_wait,
- host->wait_int == 1 ||
- host->sd_error == 1, host->timeout);
- if (host->wait_int != 1 && (time == 0 || host->sd_error != 0)) {
+ time = wait_for_completion_interruptible_timeout(&host->intr_wait,
+ host->timeout);
+ if (time <= 0 || host->sd_error) {
cmd->error = sh_mmcif_error_manage(host);
return;
}
sh_mmcif_get_cmd12response(host, cmd);
- host->wait_int = 0;
cmd->error = 0;
}
@@ -712,7 +684,7 @@ static void sh_mmcif_detect(struct mmc_host *mmc)
static irqreturn_t sh_mmcif_intr(int irq, void *dev_id)
{
struct sh_mmcif_host *host = dev_id;
- u32 state = 0;
+ u32 state;
int err = 0;
state = sh_mmcif_readl(host->addr, MMCIF_CE_INT);
@@ -757,11 +729,13 @@ static irqreturn_t sh_mmcif_intr(int irq, void *dev_id)
err = 1;
}
if (err) {
- host->sd_error = 1;
+ host->sd_error = true;
pr_debug("%s: int err state = %08x\n", DRIVER_NAME, state);
}
- host->wait_int = 1;
- wake_up(&host->intr_wait);
+ if (state & ~(INT_CMD12RBE | INT_CMD12CRE))
+ complete(&host->intr_wait);
+ else
+ dev_dbg(&host->pd->dev, "Unexpected IRQ 0x%x\n", state);
return IRQ_HANDLED;
}
@@ -819,7 +793,7 @@ static int __devinit sh_mmcif_probe(struct platform_device *pdev)
host->clk = clk_get_rate(host->hclk);
host->pd = pdev;
- init_waitqueue_head(&host->intr_wait);
+ init_completion(&host->intr_wait);
mmc->ops = &sh_mmcif_ops;
mmc->f_max = host->clk;
@@ -880,20 +854,21 @@ static int __devexit sh_mmcif_remove(struct platform_device *pdev)
struct sh_mmcif_host *host = platform_get_drvdata(pdev);
int irq[2];
- 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);
+ mmc_remove_host(host->mmc);
if (host->addr)
iounmap(host->addr);
- platform_set_drvdata(pdev, NULL);
- mmc_remove_host(host->mmc);
+ 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);
free_irq(irq[0], host);
free_irq(irq[1], host);
+ platform_set_drvdata(pdev, NULL);
+
clk_disable(host->hclk);
mmc_free_host(host->mmc);
@@ -924,5 +899,5 @@ module_exit(sh_mmcif_exit);
MODULE_DESCRIPTION("SuperH on-chip MMC/eMMC interface driver");
MODULE_LICENSE("GPL");
-MODULE_ALIAS(DRIVER_NAME);
+MODULE_ALIAS("platform:" DRIVER_NAME);
MODULE_AUTHOR("Yusuke Goda <yusuke.goda.sx@renesas.com>");
generated by cgit v0.10.2 at 2024-08-30 11:08:56 (GMT)