diff options
| author | Chaithrika U S <[email protected]> | 2010-05-26 14:41:57 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2010-05-27 09:12:39 -0700 |
| commit | 06de845f72eeb169ea624f17396cd41d03384940 (patch) | |
| tree | 48a77b4e2672551f05eee479355da1de7c88b1b9 | |
| parent | e632c45ad040a54058db577981cdc3f4b316da55 (diff) | |
davinci: mmc: add a function to control reset state of the controller
Add a helper function which will aid in changing the reset
status of the controller.
Signed-off-by: Chaithrika U S <[email protected]>
Signed-off-by: Kevin Hilman <[email protected]>
Cc: Vipin Bhandari <[email protected]>
Cc: Sudhakar Rajashekhara <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | drivers/mmc/host/davinci_mmc.c | 37 |
1 files changed, 16 insertions, 21 deletions
diff --git a/drivers/mmc/host/davinci_mmc.c b/drivers/mmc/host/davinci_mmc.c index 547d29c31b40..56afe0a00f56 100644 --- a/drivers/mmc/host/davinci_mmc.c +++ b/drivers/mmc/host/davinci_mmc.c @@ -909,19 +909,26 @@ static void mmc_davinci_cmd_done(struct mmc_davinci_host *host, } } -static void -davinci_abort_data(struct mmc_davinci_host *host, struct mmc_data *data) +static inline void mmc_davinci_reset_ctrl(struct mmc_davinci_host *host, + int val) { u32 temp; - /* reset command and data state machines */ temp = readl(host->base + DAVINCI_MMCCTL); - writel(temp | MMCCTL_CMDRST | MMCCTL_DATRST, - host->base + DAVINCI_MMCCTL); + if (val) /* reset */ + temp |= MMCCTL_CMDRST | MMCCTL_DATRST; + else /* enable */ + temp &= ~(MMCCTL_CMDRST | MMCCTL_DATRST); - temp &= ~(MMCCTL_CMDRST | MMCCTL_DATRST); - udelay(10); writel(temp, host->base + DAVINCI_MMCCTL); + udelay(10); +} + +static void +davinci_abort_data(struct mmc_davinci_host *host, struct mmc_data *data) +{ + mmc_davinci_reset_ctrl(host, 1); + mmc_davinci_reset_ctrl(host, 0); } static irqreturn_t mmc_davinci_irq(int irq, void *dev_id) @@ -1125,15 +1132,8 @@ static inline void mmc_davinci_cpufreq_deregister(struct mmc_davinci_host *host) #endif static void __init init_mmcsd_host(struct mmc_davinci_host *host) { - /* DAT line portion is diabled and in reset state */ - writel(readl(host->base + DAVINCI_MMCCTL) | MMCCTL_DATRST, - host->base + DAVINCI_MMCCTL); - - /* CMD line portion is diabled and in reset state */ - writel(readl(host->base + DAVINCI_MMCCTL) | MMCCTL_CMDRST, - host->base + DAVINCI_MMCCTL); - udelay(10); + mmc_davinci_reset_ctrl(host, 1); writel(0, host->base + DAVINCI_MMCCLK); writel(MMCCLK_CLKEN, host->base + DAVINCI_MMCCLK); @@ -1141,12 +1141,7 @@ static void __init init_mmcsd_host(struct mmc_davinci_host *host) writel(0x1FFF, host->base + DAVINCI_MMCTOR); writel(0xFFFF, host->base + DAVINCI_MMCTOD); - writel(readl(host->base + DAVINCI_MMCCTL) & ~MMCCTL_DATRST, - host->base + DAVINCI_MMCCTL); - writel(readl(host->base + DAVINCI_MMCCTL) & ~MMCCTL_CMDRST, - host->base + DAVINCI_MMCCTL); - - udelay(10); + mmc_davinci_reset_ctrl(host, 0); } static int __init davinci_mmcsd_probe(struct platform_device *pdev) |