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 --- Changes in v4: - Rebased on top of the most recent master
Changes in v3: - (none)
Changes in v2: - Added R-b tag from Quentin
drivers/mmc/dw_mmc.c | 51 +++++++++++++++++++++++++++----------------- 1 file changed, 31 insertions(+), 20 deletions(-)
diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c index 8fc26399034b..d73d58bcf7d7 100644 --- a/drivers/mmc/dw_mmc.c +++ b/drivers/mmc/dw_mmc.c @@ -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; + unsigned int blk_cnt, i;
+ data_start = (ulong)cur_idmac; blk_cnt = data->blocks;
- dwmci_wait_reset(host, DWMCI_CTRL_FIFO_RESET); - - /* Clear IDMAC interrupt */ - dwmci_writel(host, DWMCI_IDSTS, 0xFFFFFFFF); + for (i = 0;; i++) { + unsigned int flags, cnt;
- data_start = (ulong)cur_idmac; - dwmci_writel(host, DWMCI_DBADDR, (ulong)cur_idmac); - - do { - flags = DWMCI_IDMAC_OWN | DWMCI_IDMAC_CH ; - flags |= (i == 0) ? DWMCI_IDMAC_FS : 0; + 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;