forked from luck/tmp_suning_uos_patched
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 <chaithrika@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com> Cc: Vipin Bhandari <vipin.bhandari@ti.com> Cc: Sudhakar Rajashekhara <sudhakar.raj@ti.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
parent
e632c45ad0
commit
06de845f72
|
@ -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)
|
||||
|
|
Loading…
Reference in New Issue
Block a user