diff options
Diffstat (limited to 'target/linux')
| -rw-r--r-- | target/linux/xburst/files-2.6.32/drivers/mmc/host/jz_mmc.c | 40 |
1 files changed, 23 insertions, 17 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 0f1a310..6c42a12 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 @@ -101,6 +101,8 @@ #define JZ_MMC_CLK_RATE 24000000 +#define JZ4740_MMC_MAX_TIMEOUT 10000000 + struct jz4740_mmc_host { struct mmc_host *mmc; struct platform_device *pdev; @@ -212,11 +214,11 @@ static void jz4740_mmc_write_data(struct jz4740_mmc_host *host, struct mmc_data j = i >> 3; i = i & 0x7; while (j) { - timeout = 100000; + timeout = JZ4740_MMC_MAX_TIMEOUT; do { status = readw(host->base + JZ_REG_MMC_IREG); } while (!(status & JZ_MMC_IRQ_TXFIFO_WR_REQ) && --timeout); - if (timeout == 0) + if (unlikely(timeout == 0)) goto err_timeout; writew(JZ_MMC_IRQ_TXFIFO_WR_REQ, host->base + JZ_REG_MMC_IREG); @@ -233,11 +235,11 @@ static void jz4740_mmc_write_data(struct jz4740_mmc_host *host, struct mmc_data --j; } if (i) { - timeout = 100000; + timeout = JZ4740_MMC_MAX_TIMEOUT; do { status = readw(host->base + JZ_REG_MMC_IREG); } while (!(status & JZ_MMC_IRQ_TXFIFO_WR_REQ) && --timeout); - if (timeout == 0) + if (unlikely(timeout == 0)) goto err_timeout; writew(JZ_MMC_IRQ_TXFIFO_WR_REQ, host->base + JZ_REG_MMC_IREG); @@ -256,11 +258,12 @@ 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; + timeout = JZ4740_MMC_MAX_TIMEOUT; do { status = readl(host->base + JZ_REG_MMC_STATUS); } while ((status & JZ_MMC_STATUS_DATA_TRAN_DONE) == 0 && --timeout); - if (timeout == 0) + + if (unlikely(timeout == 0)) goto err_timeout; writew(JZ_MMC_IRQ_DATA_TRAN_DONE, host->base + JZ_REG_MMC_IREG); @@ -312,7 +315,7 @@ static void jz4740_mmc_read_data(struct jz4740_mmc_host *host, struct mmc_data * j = i >> 5; i = i & 0x1f; while (j) { - timeout = 100000; + timeout = JZ4740_MMC_MAX_TIMEOUT; do { status = readw(host->base + JZ_REG_MMC_IREG); } while (!(status & JZ_MMC_IRQ_RXFIFO_RD_REQ) && --timeout); @@ -336,7 +339,7 @@ static void jz4740_mmc_read_data(struct jz4740_mmc_host *host, struct mmc_data * } while (i >= 4) { - timeout = 100000; + timeout = JZ4740_MMC_MAX_TIMEOUT; do { status = readl(host->base + JZ_REG_MMC_STATUS); } while ((status & JZ_MMC_STATUS_DATA_FIFO_EMPTY) && --timeout); @@ -416,6 +419,7 @@ static irqreturn_t jz_mmc_irq(int irq, void *devid) 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); mmc_signal_sdio_irq(host->mmc); @@ -466,14 +470,17 @@ handled: static int jz4740_mmc_set_clock_rate(struct jz4740_mmc_host *host, int rate) { int div = 0; - int real_rate = host->max_clock; + int real_rate; + jz4740_mmc_clock_disable(host); + clk_set_rate(host->clk, JZ_MMC_CLK_RATE); + + real_rate = clk_get_rate(host->clk); - while ((real_rate >> 1) >= rate && div < 7) { + while (real_rate > rate && div < 7) { ++div; real_rate >>= 1; } - clk_set_rate(host->clk, JZ_MMC_CLK_RATE); writew(div, host->base + JZ_REG_MMC_CLKRT); return real_rate; @@ -543,7 +550,7 @@ static void jz4740_mmc_send_command(struct jz4740_mmc_host *host, struct mmc_com host->waiting = 1; jz4740_mmc_clock_enable(host, 1); - mod_timer(&host->timeout_timer, 4*HZ); + mod_timer(&host->timeout_timer, jiffies + 5*HZ); } static void jz4740_mmc_cmd_done(struct jz4740_mmc_host *host) @@ -551,8 +558,7 @@ 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); + unsigned int timeout = JZ4740_MMC_MAX_TIMEOUT; if (cmd->flags & MMC_RSP_PRESENT) jz4740_mmc_read_response(host, cmd); @@ -567,12 +573,12 @@ static void jz4740_mmc_cmd_done(struct jz4740_mmc_host *host) if (req->stop) { jz4740_mmc_send_command(host, req->stop); do { - status = readl(host->base + JZ_REG_MMC_STATUS); - } while ((status & JZ_MMC_STATUS_PRG_DONE) == 0 && --timeout); + status = readw(host->base + JZ_REG_MMC_IREG); + } while ((status & JZ_MMC_IRQ_PRG_DONE) == 0 && --timeout); writew(JZ_MMC_IRQ_PRG_DONE, host->base + JZ_REG_MMC_IREG); } - if (timeout == 0) + if (unlikely(timeout == 0)) req->stop->error = -ETIMEDOUT; jz4740_mmc_request_done(host); |