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path: root/drivers/mmc/host/sdhci.c
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Diffstat (limited to 'drivers/mmc/host/sdhci.c')
-rw-r--r--drivers/mmc/host/sdhci.c76
1 files changed, 37 insertions, 39 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index c279fbc4c2e..d6ab62d539f 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -174,20 +174,31 @@ static void sdhci_reset(struct sdhci_host *host, u8 mask)
sdhci_clear_set_irqs(host, SDHCI_INT_ALL_MASK, ier);
}
-static void sdhci_init(struct sdhci_host *host)
+static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios);
+
+static void sdhci_init(struct sdhci_host *host, int soft)
{
- sdhci_reset(host, SDHCI_RESET_ALL);
+ if (soft)
+ sdhci_reset(host, SDHCI_RESET_CMD|SDHCI_RESET_DATA);
+ else
+ sdhci_reset(host, SDHCI_RESET_ALL);
sdhci_clear_set_irqs(host, SDHCI_INT_ALL_MASK,
SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT |
SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_INDEX |
SDHCI_INT_END_BIT | SDHCI_INT_CRC | SDHCI_INT_TIMEOUT |
SDHCI_INT_DATA_END | SDHCI_INT_RESPONSE);
+
+ if (soft) {
+ /* force clock reconfiguration */
+ host->clock = 0;
+ sdhci_set_ios(host->mmc, &host->mmc->ios);
+ }
}
static void sdhci_reinit(struct sdhci_host *host)
{
- sdhci_init(host);
+ sdhci_init(host, 0);
sdhci_enable_card_detection(host);
}
@@ -376,6 +387,20 @@ static void sdhci_kunmap_atomic(void *buffer, unsigned long *flags)
local_irq_restore(*flags);
}
+static void sdhci_set_adma_desc(u8 *desc, u32 addr, int len, unsigned cmd)
+{
+ __le32 *dataddr = (__le32 __force *)(desc + 4);
+ __le16 *cmdlen = (__le16 __force *)desc;
+
+ /* SDHCI specification says ADMA descriptors should be 4 byte
+ * aligned, so using 16 or 32bit operations should be safe. */
+
+ cmdlen[0] = cpu_to_le16(cmd);
+ cmdlen[1] = cpu_to_le16(len);
+
+ dataddr[0] = cpu_to_le32(addr);
+}
+
static int sdhci_adma_table_pre(struct sdhci_host *host,
struct mmc_data *data)
{
@@ -443,19 +468,11 @@ static int sdhci_adma_table_pre(struct sdhci_host *host,
sdhci_kunmap_atomic(buffer, &flags);
}
- desc[7] = (align_addr >> 24) & 0xff;
- desc[6] = (align_addr >> 16) & 0xff;
- desc[5] = (align_addr >> 8) & 0xff;
- desc[4] = (align_addr >> 0) & 0xff;
+ /* tran, valid */
+ sdhci_set_adma_desc(desc, align_addr, offset, 0x21);
BUG_ON(offset > 65536);
- desc[3] = (offset >> 8) & 0xff;
- desc[2] = (offset >> 0) & 0xff;
-
- desc[1] = 0x00;
- desc[0] = 0x21; /* tran, valid */
-
align += 4;
align_addr += 4;
@@ -465,19 +482,10 @@ static int sdhci_adma_table_pre(struct sdhci_host *host,
len -= offset;
}
- desc[7] = (addr >> 24) & 0xff;
- desc[6] = (addr >> 16) & 0xff;
- desc[5] = (addr >> 8) & 0xff;
- desc[4] = (addr >> 0) & 0xff;
-
BUG_ON(len > 65536);
- desc[3] = (len >> 8) & 0xff;
- desc[2] = (len >> 0) & 0xff;
-
- desc[1] = 0x00;
- desc[0] = 0x21; /* tran, valid */
-
+ /* tran, valid */
+ sdhci_set_adma_desc(desc, addr, len, 0x21);
desc += 8;
/*
@@ -490,16 +498,9 @@ static int sdhci_adma_table_pre(struct sdhci_host *host,
/*
* Add a terminating entry.
*/
- desc[7] = 0;
- desc[6] = 0;
- desc[5] = 0;
- desc[4] = 0;
- desc[3] = 0;
- desc[2] = 0;
-
- desc[1] = 0x00;
- desc[0] = 0x03; /* nop, end, valid */
+ /* nop, end, valid */
+ sdhci_set_adma_desc(desc, 0, 0, 0x3);
/*
* Resync align buffer as we might have changed it.
@@ -1610,16 +1611,13 @@ int sdhci_resume_host(struct sdhci_host *host)
if (ret)
return ret;
- sdhci_init(host);
+ sdhci_init(host, (host->mmc->pm_flags & MMC_PM_KEEP_POWER));
mmiowb();
ret = mmc_resume_host(host->mmc);
- if (ret)
- return ret;
-
sdhci_enable_card_detection(host);
- return 0;
+ return ret;
}
EXPORT_SYMBOL_GPL(sdhci_resume_host);
@@ -1874,7 +1872,7 @@ int sdhci_add_host(struct sdhci_host *host)
if (ret)
goto untasklet;
- sdhci_init(host);
+ sdhci_init(host, 0);
#ifdef CONFIG_MMC_DEBUG
sdhci_dumpregs(host);