Current code uses two functions for dma setup, msdc_dma_config and
msdc_dma_setup. By now msdc_dma_setup is nearly empty and mainly calls
msdc_dma_config, so the later one can be inline into the first
one. While doing this there is also some refactoring done.
Signed-off-by: Christian Lütke-Stetzkamp <christ...@lkamp.de>
---
drivers/staging/mt7621-mmc/sd.c | 34 +++++++++++++---------------------
1 file changed, 13 insertions(+), 21 deletions(-)
diff --git a/drivers/staging/mt7621-mmc/sd.c b/drivers/staging/mt7621-mmc/sd.c
index 3066fa3799ac..923b0687918d 100644
--- a/drivers/staging/mt7621-mmc/sd.c
+++ b/drivers/staging/mt7621-mmc/sd.c
@@ -1030,18 +1030,24 @@ static u8 msdc_dma_calcs(u8 *buf, u32 len)
return 0xFF - (u8)sum;
}
-/* gpd bd setup + dma registers */
-static void msdc_dma_config(struct msdc_host *host, struct msdc_dma *dma)
+static void msdc_dma_setup(struct msdc_host *host, struct msdc_dma *dma,
+ struct scatterlist *sg_cmd, unsigned int sglen)
{
void __iomem *base = host->base;
- //u32 i, j, num, bdlen, arg, xfersz;
- u32 j, num;
struct scatterlist *sg;
struct gpd *gpd;
struct bd *bd;
+ u32 j, num;
+
+ BUG_ON(sglen > MAX_BD_NUM); /* not support currently */
+
+ dma->sg = sg_cmd;
+ dma->sglen = sglen;
+
+ N_MSG(DMA, "DMA sglen<%d> xfersz<%d>", sglen, host->xfer_size);
/* calculate the required number of gpd */
- num = (dma->sglen + MAX_BD_PER_GPD - 1) / MAX_BD_PER_GPD;
+ num = (sglen + MAX_BD_PER_GPD - 1) / MAX_BD_PER_GPD;
BUG_ON(num != 1);
gpd = dma->gpd;
@@ -1055,13 +1061,13 @@ static void msdc_dma_config(struct msdc_host *host,
struct msdc_dma *dma)
gpd->chksum = msdc_dma_calcs((u8 *)gpd, 16);
/* modify bd*/
- for_each_sg(dma->sg, sg, dma->sglen, j) {
+ for_each_sg(sg_cmd, sg, sglen, j) {
bd[j].blkpad = 0;
bd[j].dwpad = 0;
bd[j].ptr = (void *)sg_dma_address(sg);
bd[j].buflen = sg_dma_len(sg);
- if (j == dma->sglen - 1)
+ if (j == sglen - 1)
bd[j].eol = 1; /* the last bd */
else
bd[j].eol = 0;
@@ -1080,20 +1086,6 @@ static void msdc_dma_config(struct msdc_host *host,
struct msdc_dma *dma)
N_MSG(DMA, "DMA_CTRL = 0x%x", readl(MSDC_DMA_CTRL));
N_MSG(DMA, "DMA_CFG = 0x%x", readl(MSDC_DMA_CFG));
N_MSG(DMA, "DMA_SA = 0x%x", readl(MSDC_DMA_SA));
-
-}
-
-static void msdc_dma_setup(struct msdc_host *host, struct msdc_dma *dma,
- struct scatterlist *sg, unsigned int sglen)
-{
- BUG_ON(sglen > MAX_BD_NUM); /* not support currently */
-
- dma->sg = sg;
- dma->sglen = sglen;
-
- N_MSG(DMA, "DMA sglen<%d> xfersz<%d>", dma->sglen, host->xfer_size);
-
- msdc_dma_config(host, dma);
}
static int msdc_do_request(struct mmc_host *mmc, struct mmc_request *mrq)
--
2.16.1
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