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[ARM] 4711/1: pxa: mmc: move DMA specific code to platform layer 

This patch is to move pxamci DMA specific code to corresponding
platform layer because using DRCMRRXMMC/DRCMRTXMMC in pxamci.c makes
the driver code dedicated to platform which is not extensible.

It is applicable to all pxa platforms.

Signed-off-by: Bridge Wu <bridge.wu@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Bridge Wu 2007-12-14 10:40:25 +01:00 committed by Russell King
parent 64eb036af4
commit 9a788c6b78
2 changed files with 33 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
arch/arm/mach-pxa/generic.c
View File

@ -259,6 +259,16 @@ static struct resource pxamci_resources[] = {
.end = IRQ_MMC,
.flags = IORESOURCE_IRQ,
},
[2] = {
.start = 21,
.end = 21,
.flags = IORESOURCE_DMA,
},
[3] = {
.start = 22,
.end = 22,
.flags = IORESOURCE_DMA,
},
};
static u64 pxamci_dmamask = 0xffffffffUL;

30
drivers/mmc/host/pxamci.c
View File

@ -65,6 +65,8 @@ struct pxamci_host {
unsigned int dma_len;
unsigned int dma_dir;
unsigned int dma_drcmrrx;
unsigned int dma_drcmrtx;
};
static void pxamci_stop_clock(struct pxamci_host *host)
@ -131,13 +133,13 @@ static void pxamci_setup_data(struct pxamci_host *host, struct mmc_data *data)
if (data->flags & MMC_DATA_READ) {
host->dma_dir = DMA_FROM_DEVICE;
dcmd = DCMD_INCTRGADDR | DCMD_FLOWTRG;
DRCMRTXMMC = 0;
DRCMRRXMMC = host->dma | DRCMR_MAPVLD;
DRCMR(host->dma_drcmrtx) = 0;
DRCMR(host->dma_drcmrrx) = host->dma | DRCMR_MAPVLD;
} else {
host->dma_dir = DMA_TO_DEVICE;
dcmd = DCMD_INCSRCADDR | DCMD_FLOWSRC;
DRCMRRXMMC = 0;
DRCMRTXMMC = host->dma | DRCMR_MAPVLD;
DRCMR(host->dma_drcmrrx) = 0;
DRCMR(host->dma_drcmrtx) = host->dma | DRCMR_MAPVLD;
}
dcmd |= DCMD_BURST32 | DCMD_WIDTH1;
@ -468,7 +470,7 @@ static int pxamci_probe(struct platform_device *pdev)
{
struct mmc_host *mmc;
struct pxamci_host *host = NULL;
struct resource *r;
struct resource *r, *dmarx, *dmatx;
int ret, irq;
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@ -583,6 +585,20 @@ static int pxamci_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, mmc);
dmarx = platform_get_resource(pdev, IORESOURCE_DMA, 0);
if (!dmarx) {
ret = -ENXIO;
goto out;
}
host->dma_drcmrrx = dmarx->start;
dmatx = platform_get_resource(pdev, IORESOURCE_DMA, 1);
if (!dmatx) {
ret = -ENXIO;
goto out;
}
host->dma_drcmrtx = dmatx->start;
if (host->pdata && host->pdata->init)
host->pdata->init(&pdev->dev, pxamci_detect_irq, mmc);
@ -626,8 +642,8 @@ static int pxamci_remove(struct platform_device *pdev)
END_CMD_RES|PRG_DONE|DATA_TRAN_DONE,
host->base + MMC_I_MASK);
DRCMRRXMMC = 0;
DRCMRTXMMC = 0;
DRCMR(host->dma_drcmrrx) = 0;
DRCMR(host->dma_drcmrtx) = 0;
free_irq(host->irq, host);
pxa_free_dma(host->dma);