X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fmmc%2Fhost%2Fsdhci.c;h=b397121b947d5acf78b764c06c486a30a8fe1797;hb=d6f8deecefc133cac044f6029bdb349a1cb8753a;hp=228ce42371dcabfaf4e1feb8df1d6f172eb498c0;hpb=f75979b77fb20b01522d8fab96dfc76cc9f42420;p=linux-2.6-omap-h63xx.git

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 228ce42371d..b397121b947 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -25,8 +25,6 @@
 #define DBG(f, x...) \
 	pr_debug(DRIVER_NAME " [%s()]: " f, __func__,## x)
 
-static unsigned int debug_nodma = 0;
-static unsigned int debug_forcedma = 0;
 static unsigned int debug_quirks = 0;
 
 #define SDHCI_QUIRK_CLOCK_BEFORE_RESET			(1<<0)
@@ -35,6 +33,7 @@ static unsigned int debug_quirks = 0;
 #define SDHCI_QUIRK_NO_CARD_NO_RESET			(1<<2)
 #define SDHCI_QUIRK_SINGLE_POWER_WRITE			(1<<3)
 #define SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS		(1<<4)
+#define SDHCI_QUIRK_BROKEN_DMA				(1<<5)
 
 static const struct pci_device_id pci_ids[] __devinitdata = {
 	{
@@ -68,7 +67,8 @@ static const struct pci_device_id pci_ids[] __devinitdata = {
 		.device		= PCI_DEVICE_ID_ENE_CB712_SD,
 		.subvendor	= PCI_ANY_ID,
 		.subdevice	= PCI_ANY_ID,
-		.driver_data	= SDHCI_QUIRK_SINGLE_POWER_WRITE,
+		.driver_data	= SDHCI_QUIRK_SINGLE_POWER_WRITE |
+				  SDHCI_QUIRK_BROKEN_DMA,
 	},
 
 	{
@@ -76,7 +76,8 @@ static const struct pci_device_id pci_ids[] __devinitdata = {
 		.device		= PCI_DEVICE_ID_ENE_CB712_SD_2,
 		.subvendor	= PCI_ANY_ID,
 		.subdevice	= PCI_ANY_ID,
-		.driver_data	= SDHCI_QUIRK_SINGLE_POWER_WRITE,
+		.driver_data	= SDHCI_QUIRK_SINGLE_POWER_WRITE |
+				  SDHCI_QUIRK_BROKEN_DMA,
 	},
 
 	{
@@ -132,7 +133,7 @@ static void sdhci_dumpregs(struct sdhci_host *host)
 		readb(host->ioaddr + SDHCI_POWER_CONTROL),
 		readb(host->ioaddr + SDHCI_BLOCK_GAP_CONTROL));
 	printk(KERN_DEBUG DRIVER_NAME ": Wake-up:  0x%08x | Clock:    0x%08x\n",
-		readb(host->ioaddr + SDHCI_WALK_UP_CONTROL),
+		readb(host->ioaddr + SDHCI_WAKE_UP_CONTROL),
 		readw(host->ioaddr + SDHCI_CLOCK_CONTROL));
 	printk(KERN_DEBUG DRIVER_NAME ": Timeout:  0x%08x | Int stat: 0x%08x\n",
 		readb(host->ioaddr + SDHCI_TIMEOUT_CONTROL),
@@ -1292,20 +1293,26 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
 
 	caps = readl(host->ioaddr + SDHCI_CAPABILITIES);
 
-	if (debug_nodma)
-		DBG("DMA forced off\n");
-	else if (debug_forcedma) {
-		DBG("DMA forced on\n");
+	if (chip->quirks & SDHCI_QUIRK_FORCE_DMA)
 		host->flags |= SDHCI_USE_DMA;
-	} else if (chip->quirks & SDHCI_QUIRK_FORCE_DMA)
-		host->flags |= SDHCI_USE_DMA;
-	else if ((pdev->class & 0x0000FF) != PCI_SDHCI_IFDMA)
-		DBG("Controller doesn't have DMA interface\n");
 	else if (!(caps & SDHCI_CAN_DO_DMA))
 		DBG("Controller doesn't have DMA capability\n");
 	else
 		host->flags |= SDHCI_USE_DMA;
 
+	if ((chip->quirks & SDHCI_QUIRK_BROKEN_DMA) &&
+		(host->flags & SDHCI_USE_DMA)) {
+		DBG("Disabling DMA as it is marked broken");
+		host->flags &= ~SDHCI_USE_DMA;
+	}
+
+	if (((pdev->class & 0x0000FF) != PCI_SDHCI_IFDMA) &&
+		(host->flags & SDHCI_USE_DMA)) {
+		printk(KERN_WARNING "%s: Will use DMA "
+			"mode even though HW doesn't fully "
+			"claim to support it.\n", host->slot_descr);
+	}
+
 	if (host->flags & SDHCI_USE_DMA) {
 		if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
 			printk(KERN_WARNING "%s: No suitable DMA available. "
@@ -1599,14 +1606,10 @@ static void __exit sdhci_drv_exit(void)
 module_init(sdhci_drv_init);
 module_exit(sdhci_drv_exit);
 
-module_param(debug_nodma, uint, 0444);
-module_param(debug_forcedma, uint, 0444);
 module_param(debug_quirks, uint, 0444);
 
 MODULE_AUTHOR("Pierre Ossman <drzeus@drzeus.cx>");
 MODULE_DESCRIPTION("Secure Digital Host Controller Interface driver");
 MODULE_LICENSE("GPL");
 
-MODULE_PARM_DESC(debug_nodma, "Forcefully disable DMA transfers. (default 0)");
-MODULE_PARM_DESC(debug_forcedma, "Forcefully enable DMA transfers. (default 0)");
 MODULE_PARM_DESC(debug_quirks, "Force certain quirks.");