Commit 2054a20f authored by Chaithrika U S's avatar Chaithrika U S Committed by Kevin Hilman

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: default avatarChaithrika U S <chaithrika@ti.com>
Acked-by: default avatarKevin Hilman <khilman@deeprootsystems.com>
parent c627230d
......@@ -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);
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)
......
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