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mmc: core: rk_sdmmc: prepare for next Soc(s)

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Support fifoth adjust based on blksz each transfer handled by
external dma itf.
This commit is contained in:
lintao
2014-06-26 11:46:36 +08:00
parent d50a5ad0e9
commit f66049d586
1 changed files with 7 additions and 5 deletions
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12
drivers/mmc/host/rk_sdmmc.c
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@@ -617,7 +617,8 @@ static void dw_mci_edmac_start_dma(struct dw_mci *host, unsigned int sg_len)
slave_config.direction = DMA_MEM_TO_DEV;
slave_config.dst_addr = (dma_addr_t)(host->regs + host->data_offset);
slave_config.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
slave_config.dst_maxburst = 16;
//slave_config.dst_maxburst = 16;
slave_config.dst_maxburst = ((host->fifoth_val) >> 28) && 0x7;
ret = dmaengine_slave_config(host->dms->ch, &slave_config);
if (ret) {
@@ -626,7 +627,7 @@ static void dw_mci_edmac_start_dma(struct dw_mci *host, unsigned int sg_len)
}
desc = dmaengine_prep_slave_sg(host->dms->ch, sgl, sg_len,
DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT);
DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc) {
dev_err(host->dev, "We cannot prepare for the dw_mci slave edma!\n");
return;
@@ -644,7 +645,8 @@ static void dw_mci_edmac_start_dma(struct dw_mci *host, unsigned int sg_len)
slave_config.direction = DMA_DEV_TO_MEM;
slave_config.src_addr = (dma_addr_t)(host->regs + host->data_offset);
slave_config.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
slave_config.src_maxburst = 16;
//slave_config.src_maxburst = 16;
slave_config.dst_maxburst = ((host->fifoth_val) >> 28) && 0x7;
ret = dmaengine_slave_config(host->dms->ch, &slave_config);
if (ret) {
@@ -652,7 +654,7 @@ static void dw_mci_edmac_start_dma(struct dw_mci *host, unsigned int sg_len)
return;
}
desc = dmaengine_prep_slave_sg(host->dms->ch, sgl, sg_len,
DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT);
DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc) {
dev_err(host->dev, "We cannot prepare for the dw_mci slave edma!\n");
return;
@@ -779,7 +781,7 @@ static void dw_mci_post_req(struct mmc_host *mmc,
static void dw_mci_adjust_fifoth(struct dw_mci *host, struct mmc_data *data)
{
#ifdef CONFIG_MMC_DW_IDMAC
#if defined(CONFIG_MMC_DW_IDMAC) || defined(CONFIG_MMC_DW_EDMAC)
unsigned int blksz = data->blksz;
const u32 mszs[] = {1, 4, 8, 16, 32, 64, 128, 256};
u32 fifo_width = 1 << host->data_shift;