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mmc: dw_mmc: Extract setting the DMA descriptor into a separate routine

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Make dwmci_prepare_data() function easier to read by extracting the
preparation of IDMAC descriptor into a dedicated function.

No functional change.

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
This commit is contained in:
Sam Protsenko
2024-08-19 16:09:06 +09:00
committed by Minkyu Kang
parent 95e42a5465
commit 6e17517b5c
1 changed files with 32 additions and 21 deletions
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drivers/mmc/dw_mmc.c
+32 -21
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@@ -53,46 +53,57 @@ static void dwmci_set_idma_desc(struct dwmci_idmac *idmac,
desc->next_addr = (ulong)desc + sizeof(struct dwmci_idmac);
}
static void dwmci_prepare_data(struct dwmci_host *host,
struct mmc_data *data,
static void dwmci_prepare_desc(struct mmc_data *data,
struct dwmci_idmac *cur_idmac,
void *bounce_buffer)
{
unsigned long ctrl;
unsigned int i = 0, flags, cnt, blk_cnt;
struct dwmci_idmac *desc = cur_idmac;
ulong data_start, data_end;
blk_cnt = data->blocks;
dwmci_wait_reset(host, DWMCI_CTRL_FIFO_RESET);
/* Clear IDMAC interrupt */
dwmci_writel(host, DWMCI_IDSTS, 0xFFFFFFFF);
unsigned int blk_cnt, i;
data_start = (ulong)cur_idmac;
dwmci_writel(host, DWMCI_DBADDR, (ulong)cur_idmac);
blk_cnt = data->blocks;
do {
flags = DWMCI_IDMAC_OWN | DWMCI_IDMAC_CH ;
flags |= (i == 0) ? DWMCI_IDMAC_FS : 0;
for (i = 0;; i++) {
unsigned int flags, cnt;
flags = DWMCI_IDMAC_OWN | DWMCI_IDMAC_CH;
if (i == 0)
flags |= DWMCI_IDMAC_FS;
if (blk_cnt <= 8) {
flags |= DWMCI_IDMAC_LD;
cnt = data->blocksize * blk_cnt;
} else
cnt = data->blocksize * 8;
dwmci_set_idma_desc(cur_idmac, flags, cnt,
(ulong)bounce_buffer + (i * PAGE_SIZE));
dwmci_set_idma_desc(desc, flags, cnt,
(ulong)bounce_buffer + i * PAGE_SIZE);
desc++;
cur_idmac++;
if (blk_cnt <= 8)
break;
blk_cnt -= 8;
i++;
} while(1);
}
data_end = (ulong)cur_idmac;
data_end = (ulong)desc;
flush_dcache_range(data_start, roundup(data_end, ARCH_DMA_MINALIGN));
}
static void dwmci_prepare_data(struct dwmci_host *host,
struct mmc_data *data,
struct dwmci_idmac *cur_idmac,
void *bounce_buffer)
{
unsigned long ctrl;
dwmci_wait_reset(host, DWMCI_CTRL_FIFO_RESET);
/* Clear IDMAC interrupt */
dwmci_writel(host, DWMCI_IDSTS, 0xFFFFFFFF);
dwmci_writel(host, DWMCI_DBADDR, (ulong)cur_idmac);
dwmci_prepare_desc(data, cur_idmac, bounce_buffer);
ctrl = dwmci_readl(host, DWMCI_CTRL);
ctrl |= DWMCI_IDMAC_EN | DWMCI_DMA_EN;