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authorPierre Ossman <drzeus@drzeus.cx>2006-06-30 02:22:24 -0700
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-07-02 16:02:03 +0100
commite16514d8d86ecbde18a2a7495cf028861b34c157 (patch)
tree9bef8f5f095d8fb4088ec1344369ada10c106d00 /drivers
parent7cb2c76fa2251474e42d55b75163c9d7ed11741e (diff)
[MMC] sdhci: fix sdhci reset timeout
The reset register is automatically cleared when the reset has completed. Hence, we should busy wait and not have a fixed delay. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mmc/sdhci.c21
1 files changed, 17 insertions, 4 deletions
diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index 007e825dcb9..77b7db27b55 100644
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -94,12 +94,27 @@ static void sdhci_dumpregs(struct sdhci_host *host)
static void sdhci_reset(struct sdhci_host *host, u8 mask)
{
+ unsigned long timeout;
+
writeb(mask, host->ioaddr + SDHCI_SOFTWARE_RESET);
- if (mask & SDHCI_RESET_ALL) {
+ if (mask & SDHCI_RESET_ALL)
host->clock = 0;
- mdelay(50);
+ /* Wait max 100 ms */
+ timeout = 100;
+
+ /* hw clears the bit when it's done */
+ while (readb(host->ioaddr + SDHCI_SOFTWARE_RESET) & mask) {
+ if (timeout == 0) {
+ printk(KERN_ERR "%s: Reset 0x%x never completed. "
+ "Please report this to " BUGMAIL ".\n",
+ mmc_hostname(host->mmc), (int)mask);
+ sdhci_dumpregs(host);
+ return;
+ }
+ timeout--;
+ mdelay(1);
}
}
@@ -619,9 +634,7 @@ static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
*/
if (ios->power_mode == MMC_POWER_OFF) {
writel(0, host->ioaddr + SDHCI_SIGNAL_ENABLE);
- spin_unlock_irqrestore(&host->lock, flags);
sdhci_init(host);
- spin_lock_irqsave(&host->lock, flags);
}
sdhci_set_clock(host, ios->clock);