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MCI: dw-mmc: convert to streaming DMA ops 

Move to the common streaming DMA ops in order to get rid of
the direct usage of the ARM MMU functions for the cache
maintenance.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Lucas Stach 2015-03-05 22:50:04 +01:00 committed by Sascha Hauer
parent 3110eed114
commit 451967e8b9
2 changed files with 13 additions and 13 deletions
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2
drivers/mci/Kconfig
View File

@ -36,7 +36,7 @@ comment "--- MCI host drivers ---"
config MCI_DW
bool "Synopsys DesignWare Memory Card Interface"
depends on ARM
depends on HAS_DMA
help
This selects support for the Synopsys DesignWare Mobile Storage IP
block, this provides host support for SD and MMC interfaces, in both

24
drivers/mci/dw_mmc.c
View File

@ -29,7 +29,6 @@
#include <linux/clk.h>
#include <linux/err.h>
#include <asm-generic/errno.h>
#include <asm/mmu.h>
#define DWMCI_CTRL 0x000
#define DWMCI_PWREN 0x004
@ -282,7 +281,6 @@ dwmci_cmd(struct mci_host *mci, struct mci_cmd *cmd, struct mci_data *data)
uint64_t start;
int ret;
unsigned int num_bytes = 0;
const void *writebuf = NULL;
start = get_time_ns();
while (1) {
@ -300,12 +298,12 @@ dwmci_cmd(struct mci_host *mci, struct mci_cmd *cmd, struct mci_data *data)
if (data) {
num_bytes = data->blocks * data->blocksize;
if (data->flags & MMC_DATA_WRITE) {
dma_flush_range((unsigned long)data->src,
(unsigned long)(data->src + data->blocks * 512));
writebuf = data->src;
}
if (data->flags & MMC_DATA_WRITE)
dma_sync_single_for_device((unsigned long)data->src,
num_bytes, DMA_TO_DEVICE);
else
dma_sync_single_for_device((unsigned long)data->dest,
num_bytes, DMA_FROM_DEVICE);
ret = dwmci_prepare_data(host, data);
if (ret)
@ -389,10 +387,12 @@ dwmci_cmd(struct mci_host *mci, struct mci_cmd *cmd, struct mci_data *data)
ctrl &= ~(DWMCI_DMA_EN);
dwmci_writel(host, DWMCI_CTRL, ctrl);
if (data->flags & MMC_DATA_READ) {
dma_inv_range((unsigned long)data->dest,
(unsigned long)(data->dest + data->blocks * 512));
}
if (data->flags & MMC_DATA_WRITE)
dma_sync_single_for_cpu((unsigned long)data->src,
num_bytes, DMA_TO_DEVICE);
else
dma_sync_single_for_cpu((unsigned long)data->dest,
num_bytes, DMA_FROM_DEVICE);
}
udelay(100);