mmc: dw_mmc: use macro for HCON register operations

This patch add some macros for HCON register operations
to make code more readable.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/dw_mmc.c

@@ -2669,7 +2669,7 @@ static void dw_mci_init_dma(struct dw_mci *host)
 		* Check ADDR_CONFIG bit in HCON to find
 		* IDMAC address bus width
 		*/
-		addr_config = (mci_readl(host, HCON) >> 27) & 0x01;
+		addr_config = SDMMC_GET_ADDR_CONFIG(mci_readl(host, HCON));
 
 		if (addr_config == 1) {
 			/* host supports IDMAC in 64-bit address mode */
@@ -3046,7 +3046,7 @@ int dw_mci_probe(struct dw_mci *host)
 	 * Get the host data width - this assumes that HCON has been set with
 	 * the correct values.
 	 */
-	i = (mci_readl(host, HCON) >> 7) & 0x7;
+	i = SDMMC_GET_HDATA_WIDTH(mci_readl(host, HCON));
 	if (!i) {
 		host->push_data = dw_mci_push_data16;
 		host->pull_data = dw_mci_pull_data16;
@@ -3128,7 +3128,7 @@ int dw_mci_probe(struct dw_mci *host)
 	if (host->pdata->num_slots)
 		host->num_slots = host->pdata->num_slots;
 	else
-		host->num_slots = ((mci_readl(host, HCON) >> 1) & 0x1F) + 1;
+		host->num_slots = SDMMC_GET_SLOT_NUM(mci_readl(host, HCON));
 
 	/*
 	 * Enable interrupts for command done, data over, data empty,

drivers/mmc/host/dw_mmc.h

@@ -154,6 +154,9 @@
 #define DMA_INTERFACE_GDMA		(0x2)
 #define DMA_INTERFACE_NODMA		(0x3)
 #define SDMMC_GET_TRANS_MODE(x)		(((x)>>16) & 0x3)
+#define SDMMC_GET_SLOT_NUM(x)		((((x)>>1) & 0x1F) + 1)
+#define SDMMC_GET_HDATA_WIDTH(x)	(((x)>>7) & 0x7)
+#define SDMMC_GET_ADDR_CONFIG(x)	(((x)>>27) & 0x1)
 /* Internal DMAC interrupt defines */
 #define SDMMC_IDMAC_INT_AI		BIT(9)
 #define SDMMC_IDMAC_INT_NI		BIT(8)