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authorChaotian Jing <chaotian.jing@mediatek.com>2015-10-27 09:24:25 +0300
committerUlf Hansson <ulf.hansson@linaro.org>2015-10-27 12:21:16 +0300
commit62b0d27af85ef1b1729c2ed675c12020e1fbf10f (patch)
treea49ce9dabbfbc98034afab7bdfd4c0f2b3193934 /drivers/mmc
parent6e622947e149fa9fd62e3609aab010935c8e10bd (diff)
downloadlinux-62b0d27af85ef1b1729c2ed675c12020e1fbf10f.tar.xz
mmc: mediatek: fix got GPD checksum error interrupt when data transfer
Even if we only use one gpd, we need alloc 2 gpd and make the gpd->next pointer to the second gpd, or may get gpd checksum error, this was checked by hardware Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/mtk-sd.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
index c877dedf23d2..385816375614 100644
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c
@@ -1145,11 +1145,14 @@ static void msdc_init_gpd_bd(struct msdc_host *host, struct msdc_dma *dma)
struct mt_bdma_desc *bd = dma->bd;
int i;
- memset(gpd, 0, sizeof(struct mt_gpdma_desc));
+ memset(gpd, 0, sizeof(struct mt_gpdma_desc) * 2);
gpd->gpd_info = GPDMA_DESC_BDP; /* hwo, cs, bd pointer */
gpd->ptr = (u32)dma->bd_addr; /* physical address */
-
+ /* gpd->next is must set for desc DMA
+ * That's why must alloc 2 gpd structure.
+ */
+ gpd->next = (u32)dma->gpd_addr + sizeof(struct mt_gpdma_desc);
memset(bd, 0, sizeof(struct mt_bdma_desc) * MAX_BD_NUM);
for (i = 0; i < (MAX_BD_NUM - 1); i++)
bd[i].next = (u32)dma->bd_addr + sizeof(*bd) * (i + 1);
@@ -1306,7 +1309,7 @@ static int msdc_drv_probe(struct platform_device *pdev)
host->timeout_clks = 3 * 1048576;
host->dma.gpd = dma_alloc_coherent(&pdev->dev,
- sizeof(struct mt_gpdma_desc),
+ 2 * sizeof(struct mt_gpdma_desc),
&host->dma.gpd_addr, GFP_KERNEL);
host->dma.bd = dma_alloc_coherent(&pdev->dev,
MAX_BD_NUM * sizeof(struct mt_bdma_desc),
@@ -1347,7 +1350,7 @@ release:
release_mem:
if (host->dma.gpd)
dma_free_coherent(&pdev->dev,
- sizeof(struct mt_gpdma_desc),
+ 2 * sizeof(struct mt_gpdma_desc),
host->dma.gpd, host->dma.gpd_addr);
if (host->dma.bd)
dma_free_coherent(&pdev->dev,