Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=281dd2...
Commit: 281dd23ea03e9893c02d237d9e35a7d20d412452
Parent: c4223c2c91fa9e5addd6eadd804e57a925ac5e5e
Author: Manuel Lauss <mano@roarinelk.homelinux.net>
AuthorDate: Mon Jun 9 08:37:33 2008 +0200
Committer: Pierre Ossman <drzeus@drzeus.cx>
CommitDate: Tue Jul 15 14:14:43 2008 +0200
au1xmmc: enable 4 bit transfer mode
Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
---
drivers/mmc/host/au1xmmc.c | 22 +++++++++++++++++-----
1 files changed, 17 insertions(+), 5 deletions(-)
diff --git a/drivers/mmc/host/au1xmmc.c b/drivers/mmc/host/au1xmmc.c
index d8776d6..2bd4cf4 100644
--- a/drivers/mmc/host/au1xmmc.c
+++ b/drivers/mmc/host/au1xmmc.c
@@ -95,14 +95,13 @@ static inline void IRQ_OFF(struct au1xmmc_host *host, u32 mask)
static inline void SEND_STOP(struct au1xmmc_host *host)
{
-
- /* We know the value of CONFIG2, so avoid a read we don't need */
- u32 mask = SD_CONFIG2_EN;
+ u32 config2;
WARN_ON(host->status != HOST_S_DATA);
host->status = HOST_S_STOP;
- au_writel(mask | SD_CONFIG2_DF, HOST_CONFIG2(host));
+ config2 = au_readl(HOST_CONFIG2(host));
+ au_writel(config2 | SD_CONFIG2_DF, HOST_CONFIG2(host));
au_sync();
/* Send the stop commmand */
@@ -697,6 +696,7 @@ static void au1xmmc_reset_controller(struct au1xmmc_host *host)
static void au1xmmc_set_ios(struct mmc_host* mmc, struct mmc_ios* ios)
{
struct au1xmmc_host *host = mmc_priv(mmc);
+ u32 config2;
if (ios->power_mode == MMC_POWER_OFF)
au1xmmc_set_power(host, 0);
@@ -708,6 +708,18 @@ static void au1xmmc_set_ios(struct mmc_host* mmc, struct mmc_ios* ios)
au1xmmc_set_clock(host, ios->clock);
host->clock = ios->clock;
}
+
+ config2 = au_readl(HOST_CONFIG2(host));
+ switch (ios->bus_width) {
+ case MMC_BUS_WIDTH_4:
+ config2 |= SD_CONFIG2_WB;
+ break;
+ case MMC_BUS_WIDTH_1:
+ config2 &= ~SD_CONFIG2_WB;
+ break;
+ }
+ au_writel(config2, HOST_CONFIG2(host));
+ au_sync();
}
#define STATUS_TIMEOUT (SD_STATUS_RAT | SD_STATUS_DT)
@@ -952,7 +964,7 @@ static int __devinit au1xmmc_probe(struct platform_device *pdev)
mmc->max_blk_count = 512;
mmc->ocr_avail = AU1XMMC_OCR;
- mmc->caps = 0;
+ mmc->caps = MMC_CAP_4_BIT_DATA;
host->status = HOST_S_IDLE;
--
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