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authorManuel Lauss <mano@roarinelk.homelinux.net>2008-07-29 04:10:49 -0400
committerPierre Ossman <drzeus@drzeus.cx>2008-08-01 13:04:26 -0400
commite491d230fd398bb730e3c2dd734c5447463b9d38 (patch)
tree84017cd3fe7bddb473977e9d4cf27539bdf7a90f /drivers/mmc/host
parentb41e9c7b8e14ea57aa0fc05fd63a0de0e935d58d (diff)
au1xmmc: raise segment size limit.
Raise the DMA block size limit from 2048 bytes to the maximum supported by the DMA controllers on the chip (64KB on Au1100, 4MB on Au1200). This gives a very small performance boost and apparently fixes an oops when MMC-DMA and network traffic are active at the same time. Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'drivers/mmc/host')
-rw-r--r--drivers/mmc/host/au1xmmc.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/mmc/host/au1xmmc.c b/drivers/mmc/host/au1xmmc.c
index 99b20917cc0f..d3f55615c099 100644
--- a/drivers/mmc/host/au1xmmc.c
+++ b/drivers/mmc/host/au1xmmc.c
@@ -61,7 +61,13 @@
61 61
62/* Hardware definitions */ 62/* Hardware definitions */
63#define AU1XMMC_DESCRIPTOR_COUNT 1 63#define AU1XMMC_DESCRIPTOR_COUNT 1
64#define AU1XMMC_DESCRIPTOR_SIZE 2048 64
65/* max DMA seg size: 64KB on Au1100, 4MB on Au1200 */
66#ifdef CONFIG_SOC_AU1100
67#define AU1XMMC_DESCRIPTOR_SIZE 0x0000ffff
68#else /* Au1200 */
69#define AU1XMMC_DESCRIPTOR_SIZE 0x003fffff
70#endif
65 71
66#define AU1XMMC_OCR (MMC_VDD_27_28 | MMC_VDD_28_29 | MMC_VDD_29_30 | \ 72#define AU1XMMC_OCR (MMC_VDD_27_28 | MMC_VDD_28_29 | MMC_VDD_29_30 | \
67 MMC_VDD_30_31 | MMC_VDD_31_32 | MMC_VDD_32_33 | \ 73 MMC_VDD_30_31 | MMC_VDD_31_32 | MMC_VDD_32_33 | \