X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fmmc%2Fhost%2Fsdhci.c;h=17b4e391db3590a02feb53b931cfc3f30abed30d;hb=dc93441b3f5879a096dd117a81df541b0855ebbb;hp=b397121b947d5acf78b764c06c486a30a8fe1797;hpb=038a5008b2f395c85e6e71d6ddf3c684e7c405b0;p=linux-2.6-omap-h63xx.git

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index b397121b947..17b4e391db3 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -13,11 +13,10 @@
 #include <linux/highmem.h>
 #include <linux/pci.h>
 #include <linux/dma-mapping.h>
+#include <linux/scatterlist.h>
 
 #include <linux/mmc/host.h>
 
-#include <asm/scatterlist.h>
-
 #include "sdhci.h"
 
 #define DRIVER_NAME "sdhci"
@@ -27,12 +26,22 @@
 
 static unsigned int debug_quirks = 0;
 
+/*
+ * Different quirks to handle when the hardware deviates from a strict
+ * interpretation of the SDHCI specification.
+ */
+
+/* Controller doesn't honor resets unless we touch the clock register */
 #define SDHCI_QUIRK_CLOCK_BEFORE_RESET			(1<<0)
+/* Controller has bad caps bits, but really supports DMA */
 #define SDHCI_QUIRK_FORCE_DMA				(1<<1)
 /* Controller doesn't like some resets when there is no card inserted. */
 #define SDHCI_QUIRK_NO_CARD_NO_RESET			(1<<2)
+/* Controller doesn't like clearing the power reg before a change */
 #define SDHCI_QUIRK_SINGLE_POWER_WRITE			(1<<3)
+/* Controller has flaky internal state so reset it on each ios change */
 #define SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS		(1<<4)
+/* Controller has an unusable DMA engine */
 #define SDHCI_QUIRK_BROKEN_DMA				(1<<5)
 
 static const struct pci_device_id pci_ids[] __devinitdata = {
@@ -231,7 +240,7 @@ static void sdhci_deactivate_led(struct sdhci_host *host)
 
 static inline char* sdhci_sg_to_buffer(struct sdhci_host* host)
 {
-	return page_address(host->cur_sg->page) + host->cur_sg->offset;
+	return sg_virt(host->cur_sg);
 }
 
 static inline int sdhci_next_sg(struct sdhci_host* host)
@@ -1302,7 +1311,7 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
 
 	if ((chip->quirks & SDHCI_QUIRK_BROKEN_DMA) &&
 		(host->flags & SDHCI_USE_DMA)) {
-		DBG("Disabling DMA as it is marked broken");
+		DBG("Disabling DMA as it is marked broken\n");
 		host->flags &= ~SDHCI_USE_DMA;
 	}