[PATCH v4 03/38] mmc: dw_mmc: Extract waiting for data busy into a separate routine

[Sam Protsenko]

Waiting for data busy is a logically separate operation and should be
implemented as a separate routine. Follow Linux kernel example and
extract it from dwmci_send_cmd(). This way it doesn't clutter
dwmci_send_cmd() function, and can be reused later in other cases.

No functional change.

Signed-off-by: Sam Protsenko <semen.protsenko at linaro.org>
Reviewed-by: Quentin Schulz <quentin.schulz at cherry.de>
---
Changes in v4:
  - (none)

Changes in v3:
  - (none)

Changes in v2:
  - Added R-b tag from Quentin

 drivers/mmc/dw_mmc.c | 25 ++++++++++++++++---------
 1 file changed, 16 insertions(+), 9 deletions(-)

diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c
index 45665e517068..395b699b0a0a 100644
--- a/drivers/mmc/dw_mmc.c
+++ b/drivers/mmc/dw_mmc.c
@@ -245,6 +245,21 @@ static int dwmci_set_transfer_mode(struct dwmci_host *host,
 	return mode;
 }
 
+static void dwmci_wait_while_busy(struct dwmci_host *host, struct mmc_cmd *cmd)
+{
+	unsigned int timeout = 500; /* msec */
+	ulong start;
+
+	start = get_timer(0);
+	while (dwmci_readl(host, DWMCI_STATUS) & DWMCI_BUSY) {
+		if (get_timer(start) > timeout) {
+			debug("%s: Timeout on data busy, continue anyway\n",
+			      __func__);
+			break;
+		}
+	}
+}
+
 #ifdef CONFIG_DM_MMC
 static int dwmci_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
 		   struct mmc_data *data)
@@ -259,19 +274,11 @@ static int dwmci_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
 	ALLOC_CACHE_ALIGN_BUFFER(struct dwmci_idmac, cur_idmac,
 				 data ? DIV_ROUND_UP(data->blocks, 8) : 0);
 	int ret = 0, flags = 0, i;
-	unsigned int timeout = 500;
 	u32 retry = 100000;
 	u32 mask, ctrl;
-	ulong start = get_timer(0);
 	struct bounce_buffer bbstate;
 
-	while (dwmci_readl(host, DWMCI_STATUS) & DWMCI_BUSY) {
-		if (get_timer(start) > timeout) {
-			debug("%s: Timeout on data busy, continue anyway\n", __func__);
-			break;
-		}
-	}
-
+	dwmci_wait_while_busy(host, cmd);
 	dwmci_writel(host, DWMCI_RINTSTS, DWMCI_INTMSK_ALL);
 
 	if (data) {
-- 
2.39.2