[ARM] 3457/1: i.MX: SD/MMC support for i.MX/MX1

Patch from Pavel Pisa

This patch adds support of i.MX/MX1 SD/MMC controller.
It has been significantly redesigned from the original Sascha Hauer's
version to support scatter-gather DMA, to conform to latest Pierre Ossman's
and Russell King's MMC-SD Linux 2.6.x infrastructure.
The handling of all events has been moved to the softirq context
and is designed with no busy-looping in mind. Unfortunately
some controller bugs has to be overcome by limited looping
about 2-20 usec but these are observed only for initial card
recognition phase.

There are still some missing/missed IRQs problems under heavy load.
Help of somebody with access to the full SDHC design information
is probably necessary.

Regenerated against 2.6.16-git-060402 to solve clash with other patches.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 13 insertions, 0 deletions

diff --git a/arch/arm/mach-imx/generic.c b/arch/arm/mach-imx/generic.c
index 37613ad6836..9d8331be2b5 100644
--- a/arch/arm/mach-imx/generic.c
+++ b/arch/arm/mach-imx/generic.c
@@ -33,6 +33,7 @@
 #include <asm/arch/imx-regs.h>
 
 #include <asm/mach/map.h>
+#include <asm/arch/mmc.h>
 
 void imx_gpio_mode(int gpio_mode)
 {
@@ -175,13 +176,25 @@ static struct resource imx_mmc_resources[] = {
         },
 };
 
+static u64 imxmmmc_dmamask = 0xffffffffUL;
+
 static struct platform_device imx_mmc_device = {
         .name           = "imx-mmc",
         .id             = 0,
+        .dev            = {
+                .dma_mask = &imxmmmc_dmamask,
+                .coherent_dma_mask = 0xffffffff,
+        },
         .num_resources  = ARRAY_SIZE(imx_mmc_resources),
         .resource       = imx_mmc_resources,
 };
 
+void __init imx_set_mmc_info(struct imxmmc_platform_data *info)
+{
+        imx_mmc_device.dev.platform_data = info;
+}
+EXPORT_SYMBOL(imx_set_mmc_info);
+
 static struct resource imx_uart1_resources[] = {
         [0] = {
                 .start  = 0x00206000,