1 files changed, 62 insertions, 9 deletions

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 4d010a984be..ed2c89254df 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -73,6 +73,11 @@ static void sdhci_dumpregs(struct sdhci_host *host)
 		readl(host->ioaddr + SDHCI_CAPABILITIES),
 		readl(host->ioaddr + SDHCI_MAX_CURRENT));
 
+	if (host->flags & SDHCI_USE_ADMA)
+		printk(KERN_DEBUG DRIVER_NAME ": ADMA Err: 0x%08x | ADMA Ptr: 0x%08x\n",
+		       readl(host->ioaddr + SDHCI_ADMA_ERROR),
+		       readl(host->ioaddr + SDHCI_ADMA_ADDRESS));
+
 	printk(KERN_DEBUG DRIVER_NAME ": ===========================================\n");
 }
 
@@ -731,6 +736,23 @@ static void sdhci_set_transfer_mode(struct sdhci_host *host,
 	writew(mode, host->ioaddr + SDHCI_TRANSFER_MODE);
 }
 
+static void shdci_check_dma_overrun(struct sdhci_host *host, struct mmc_data *data)
+{
+	u32 dma_pos = readl(host->ioaddr + SDHCI_DMA_ADDRESS);
+	u32 dma_start = sg_dma_address(data->sg);
+	u32 dma_end = dma_start + data->sg->length;
+
+	/* Test whether we ended up moving more data than
+	 * was originally requested. */
+
+	if (dma_pos <= dma_end)
+		return;
+
+	printk(KERN_ERR "%s: dma overrun, dma %08x, req %08x..%08x\n",
+	       mmc_hostname(host->mmc), dma_pos,
+	       dma_start, dma_end);
+}
+
 static void sdhci_finish_data(struct sdhci_host *host)
 {
 	struct mmc_data *data;
@@ -744,6 +766,8 @@ static void sdhci_finish_data(struct sdhci_host *host)
 		if (host->flags & SDHCI_USE_ADMA)
 			sdhci_adma_table_post(host, data);
 		else {
+			shdci_check_dma_overrun(host, data);
+
 			dma_unmap_sg(mmc_dev(host->mmc), data->sg,
 				data->sg_len, (data->flags & MMC_DATA_READ) ?
 					DMA_FROM_DEVICE : DMA_TO_DEVICE);
@@ -883,13 +907,18 @@ static void sdhci_finish_command(struct sdhci_host *host)
 
 static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
 {
+	if (clock == host->clock)
+		return;
+
+	host->ops->change_clock(host, clock);
+}
+
+void sdhci_change_clock(struct sdhci_host *host, unsigned int clock)
+{
 	int div;
 	u16 clk;
 	unsigned long timeout;
 
-	if (clock == host->clock)
-		return;
-
 	writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL);
 
 	if (clock == 0)
@@ -926,6 +955,8 @@ out:
 	host->clock = clock;
 }
 
+EXPORT_SYMBOL_GPL(sdhci_set_clock);
+
 static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
 {
 	u8 pwr;
@@ -1033,6 +1064,9 @@ static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 		sdhci_init(host);
 	}
 
+	if (host->ops->set_ios)
+		host->ops->set_ios(host, ios);
+
 	sdhci_set_clock(host, ios->clock);
 
 	if (ios->power_mode == MMC_POWER_OFF)
@@ -1283,11 +1317,24 @@ static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask)
 	 *       controllers.
 	 */
 	if (host->cmd->flags & MMC_RSP_BUSY) {
+		u32 present;
+
 		if (host->cmd->data)
 			DBG("Cannot wait for busy signal when also "
 				"doing a data transfer");
-		else
+		else if (!(host->quirks & SDHCI_QUIRK_NO_TCIRQ_ON_NOT_BUSY))
 			return;
+
+		/* The Samsung SDHCI does not seem to provide an INT_DATA_END
+		 * when the system goes non-busy, so check the state of the
+		 * transfer by reading SDHCI_PRESENT_STATE to see if the
+		 * controller is ready
+		 */
+
+		present = readl(host->ioaddr + SDHCI_PRESENT_STATE);
+		DBG("busy? present %08x, intstat %08x\n", present, intmask);
+
+		/* fall through and take the SDHCI_INT_RESPONSE */
 	}
 
 	if (intmask & SDHCI_INT_RESPONSE)
@@ -1604,17 +1651,23 @@ int sdhci_add_host(struct sdhci_host *host)
 		mmc_dev(host->mmc)->dma_mask = &host->dma_mask;
 	}
 
-	host->max_clk =
-		(caps & SDHCI_CLOCK_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT;
+	if (host->ops->get_max_clock)
+		host->max_clk = host->ops->get_max_clock(host);
+	else {
+		host->max_clk =	(caps & SDHCI_CLOCK_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT;
+		host->max_clk *= 1000000;
+	}
 	if (host->max_clk == 0) {
 		printk(KERN_ERR "%s: Hardware doesn't specify base clock "
 			"frequency.\n", mmc_hostname(mmc));
 		return -ENODEV;
 	}
-	host->max_clk *= 1000000;
 
-	host->timeout_clk =
-		(caps & SDHCI_TIMEOUT_CLK_MASK) >> SDHCI_TIMEOUT_CLK_SHIFT;
+	if (host->ops->get_timeout_clock)
+		host->timeout_clk = host->ops->get_timeout_clock(host);
+	else
+		host->timeout_clk =
+			(caps & SDHCI_TIMEOUT_CLK_MASK) >> SDHCI_TIMEOUT_CLK_SHIFT;
 	if (host->timeout_clk == 0) {
 		printk(KERN_ERR "%s: Hardware doesn't specify timeout clock "
 			"frequency.\n", mmc_hostname(mmc));