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path: root/target/linux/xburst/files-2.6.32/drivers/mmc
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Diffstat (limited to 'target/linux/xburst/files-2.6.32/drivers/mmc')
-rw-r--r--target/linux/xburst/files-2.6.32/drivers/mmc/host/jz_mmc.c63
1 files changed, 53 insertions, 10 deletions
diff --git a/target/linux/xburst/files-2.6.32/drivers/mmc/host/jz_mmc.c b/target/linux/xburst/files-2.6.32/drivers/mmc/host/jz_mmc.c
index e4bdde063b..0f1a310a78 100644
--- a/target/linux/xburst/files-2.6.32/drivers/mmc/host/jz_mmc.c
+++ b/target/linux/xburst/files-2.6.32/drivers/mmc/host/jz_mmc.c
@@ -203,6 +203,7 @@ static void jz4740_mmc_write_data(struct jz4740_mmc_host *host, struct mmc_data
struct scatterlist *sg;
uint32_t *sg_pointer;
int status;
+ unsigned int timeout;
size_t i, j;
for (sg = data->sg; sg; sg = sg_next(sg)) {
@@ -211,9 +212,13 @@ static void jz4740_mmc_write_data(struct jz4740_mmc_host *host, struct mmc_data
j = i >> 3;
i = i & 0x7;
while (j) {
+ timeout = 100000;
do {
status = readw(host->base + JZ_REG_MMC_IREG);
- } while (!(status & JZ_MMC_IRQ_TXFIFO_WR_REQ));
+ } while (!(status & JZ_MMC_IRQ_TXFIFO_WR_REQ) && --timeout);
+ if (timeout == 0)
+ goto err_timeout;
+
writew(JZ_MMC_IRQ_TXFIFO_WR_REQ, host->base + JZ_REG_MMC_IREG);
writel(sg_pointer[0], host->base + JZ_REG_MMC_TXFIFO);
@@ -228,9 +233,13 @@ static void jz4740_mmc_write_data(struct jz4740_mmc_host *host, struct mmc_data
--j;
}
if (i) {
+ timeout = 100000;
do {
status = readw(host->base + JZ_REG_MMC_IREG);
- } while (!(status & JZ_MMC_IRQ_TXFIFO_WR_REQ));
+ } while (!(status & JZ_MMC_IRQ_TXFIFO_WR_REQ) && --timeout);
+ if (timeout == 0)
+ goto err_timeout;
+
writew(JZ_MMC_IRQ_TXFIFO_WR_REQ, host->base + JZ_REG_MMC_IREG);
while (i) {
@@ -247,12 +256,19 @@ static void jz4740_mmc_write_data(struct jz4740_mmc_host *host, struct mmc_data
goto err;
writew(JZ_MMC_IRQ_TXFIFO_WR_REQ, host->base + JZ_REG_MMC_IREG);
+ timeout = 100000;
do {
status = readl(host->base + JZ_REG_MMC_STATUS);
- } while ((status & JZ_MMC_STATUS_DATA_TRAN_DONE) == 0);
+ } while ((status & JZ_MMC_STATUS_DATA_TRAN_DONE) == 0 && --timeout);
+ if (timeout == 0)
+ goto err_timeout;
writew(JZ_MMC_IRQ_DATA_TRAN_DONE, host->base + JZ_REG_MMC_IREG);
return;
+err_timeout:
+ host->req->cmd->error = -ETIMEDOUT;
+ data->error = -ETIMEDOUT;
+ return;
err:
if(status & (JZ_MMC_STATUS_TIMEOUT_WRITE)) {
host->req->cmd->error = -ETIMEDOUT;
@@ -288,6 +304,7 @@ static void jz4740_mmc_read_data(struct jz4740_mmc_host *host, struct mmc_data *
uint32_t d;
uint16_t status = 0;
size_t i, j;
+ unsigned int timeout;
for (sg = data->sg; sg; sg = sg_next(sg)) {
sg_pointer = sg_virt(sg);
@@ -295,9 +312,14 @@ static void jz4740_mmc_read_data(struct jz4740_mmc_host *host, struct mmc_data *
j = i >> 5;
i = i & 0x1f;
while (j) {
+ timeout = 100000;
do {
status = readw(host->base + JZ_REG_MMC_IREG);
- } while (!(status & JZ_MMC_IRQ_RXFIFO_RD_REQ));
+ } while (!(status & JZ_MMC_IRQ_RXFIFO_RD_REQ) && --timeout);
+
+ if (unlikely(timeout == 0))
+ goto err_timeout;
+
writew(JZ_MMC_IRQ_RXFIFO_RD_REQ, host->base + JZ_REG_MMC_IREG);
sg_pointer[0] = readl(host->base + JZ_REG_MMC_RXFIFO);
@@ -314,9 +336,13 @@ static void jz4740_mmc_read_data(struct jz4740_mmc_host *host, struct mmc_data *
}
while (i >= 4) {
+ timeout = 100000;
do {
status = readl(host->base + JZ_REG_MMC_STATUS);
- } while ((status & JZ_MMC_STATUS_DATA_FIFO_EMPTY));
+ } while ((status & JZ_MMC_STATUS_DATA_FIFO_EMPTY) && --timeout);
+
+ if (unlikely(timeout == 0))
+ goto err_timeout;
*sg_pointer = readl(host->base + JZ_REG_MMC_RXFIFO);
++sg_pointer;
@@ -337,12 +363,15 @@ static void jz4740_mmc_read_data(struct jz4740_mmc_host *host, struct mmc_data *
/* For whatever reason there is sometime one word more in the fifo then
* requested */
- while ((status & JZ_MMC_STATUS_DATA_FIFO_EMPTY) == 0) {
+ while ((status & JZ_MMC_STATUS_DATA_FIFO_EMPTY) == 0 && --timeout) {
d = readl(host->base + JZ_REG_MMC_RXFIFO);
status = readl(host->base + JZ_REG_MMC_STATUS);
}
return;
-
+err_timeout:
+ host->req->cmd->error = -ETIMEDOUT;
+ data->error = -ETIMEDOUT;
+ return;
err:
if(status & JZ_MMC_STATUS_TIMEOUT_READ) {
host->req->cmd->error = -ETIMEDOUT;
@@ -375,9 +404,17 @@ static irqreturn_t jz_mmc_irq(int irq, void *devid)
irq_reg = readw(host->base + JZ_REG_MMC_IREG);
tmp = irq_reg;
- spin_lock(&host->lock);
+ spin_lock_irqsave(&host->lock, flags);
irq_reg &= ~host->irq_mask;
- spin_unlock(&host->lock);
+ spin_unlock_irqrestore(&host->lock, flags);
+
+ tmp &= ~(JZ_MMC_IRQ_TXFIFO_WR_REQ | JZ_MMC_IRQ_RXFIFO_RD_REQ |
+ JZ_MMC_IRQ_PRG_DONE | JZ_MMC_IRQ_DATA_TRAN_DONE);
+
+ if (tmp != irq_reg) {
+ dev_warn(&host->pdev->dev, "Sparse irq: %x\n", tmp & ~irq_reg);
+ writew(tmp & ~irq_reg, host->base + JZ_REG_MMC_IREG);
+ }
if (irq_reg & JZ_MMC_IRQ_SDIO) {
writew(JZ_MMC_IRQ_SDIO, host->base + JZ_REG_MMC_IREG);
@@ -394,6 +431,7 @@ static irqreturn_t jz_mmc_irq(int irq, void *devid)
spin_unlock_irqrestore(&host->lock, flags);
goto handled;
}
+
host->waiting = 0;
spin_unlock_irqrestore(&host->lock, flags);
@@ -513,6 +551,7 @@ static void jz4740_mmc_cmd_done(struct jz4740_mmc_host *host)
uint32_t status;
struct mmc_command *cmd = host->req->cmd;
struct mmc_request *req = host->req;
+ unsigned int timeout = 100000;
status = readl(host->base + JZ_REG_MMC_STATUS);
if (cmd->flags & MMC_RSP_PRESENT)
@@ -529,10 +568,13 @@ static void jz4740_mmc_cmd_done(struct jz4740_mmc_host *host)
jz4740_mmc_send_command(host, req->stop);
do {
status = readl(host->base + JZ_REG_MMC_STATUS);
- } while ((status & JZ_MMC_STATUS_PRG_DONE) == 0);
+ } while ((status & JZ_MMC_STATUS_PRG_DONE) == 0 && --timeout);
writew(JZ_MMC_IRQ_PRG_DONE, host->base + JZ_REG_MMC_IREG);
}
+ if (timeout == 0)
+ req->stop->error = -ETIMEDOUT;
+
jz4740_mmc_request_done(host);
}
@@ -558,6 +600,7 @@ static void jz4740_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
switch(ios->power_mode) {
case MMC_POWER_UP:
+ jz4740_mmc_reset(host);
if (gpio_is_valid(host->pdata->gpio_power))
gpio_set_value(host->pdata->gpio_power,
!host->pdata->power_active_low);
generated by cgit v1.2.3 (git 2.46.0) at 2024-12-29 19:25:40 +0000