mmc: dw_mmc: add support for the other bit of sdio interrupt

The bit of sdio interrupt is 16 in designware implementation,
but it is 24 on Rockchip SoCs.This patch add sdio_id0 for the
number of slot0 in the SDIO interrupt registers.

Signed-off-by: Addy Ke <addy.ke@rock-chips.com>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/dw_mmc-rockchip.c

@@ -68,14 +68,24 @@ static void dw_mci_rk3288_set_ios(struct dw_mci *host, struct mmc_ios *ios)
 	}
 }
 
+static int dw_mci_rockchip_init(struct dw_mci *host)
+{
+	/* It is slot 8 on Rockchip SoCs */
+	host->sdio_id0 = 8;
+
+	return 0;
+}
+
 static const struct dw_mci_drv_data rk2928_drv_data = {
 	.prepare_command        = dw_mci_rockchip_prepare_command,
+	.init			= dw_mci_rockchip_init,
 };
 
 static const struct dw_mci_drv_data rk3288_drv_data = {
 	.prepare_command        = dw_mci_rockchip_prepare_command,
 	.set_ios		= dw_mci_rk3288_set_ios,
 	.setup_clock    = dw_mci_rk3288_setup_clock,
+	.init			= dw_mci_rockchip_init,
 };
 
 static const struct of_device_id dw_mci_rockchip_match[] = {

drivers/mmc/host/dw_mmc.c

@@ -919,7 +919,7 @@ static void dw_mci_setup_bus(struct dw_mci_slot *slot, bool force_clkinit)
 
 		/* enable clock; only low power if no SDIO */
 		clk_en_a = SDMMC_CLKEN_ENABLE << slot->id;
-		if (!(mci_readl(host, INTMASK) & SDMMC_INT_SDIO(slot->id)))
+		if (!(mci_readl(host, INTMASK) & SDMMC_INT_SDIO(slot->sdio_id)))
 			clk_en_a |= SDMMC_CLKEN_LOW_PWR << slot->id;
 		mci_writel(host, CLKENA, clk_en_a);
 
@@ -1280,10 +1280,10 @@ static void dw_mci_enable_sdio_irq(struct mmc_host *mmc, int enb)
 		dw_mci_disable_low_power(slot);
 
 		mci_writel(host, INTMASK,
-			   (int_mask | SDMMC_INT_SDIO(slot->id)));
+			   (int_mask | SDMMC_INT_SDIO(slot->sdio_id)));
 	} else {
 		mci_writel(host, INTMASK,
-			   (int_mask & ~SDMMC_INT_SDIO(slot->id)));
+			   (int_mask & ~SDMMC_INT_SDIO(slot->sdio_id)));
 	}
 }
 
@@ -2152,8 +2152,9 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id)
 		/* Handle SDIO Interrupts */
 		for (i = 0; i < host->num_slots; i++) {
 			struct dw_mci_slot *slot = host->slot[i];
-			if (pending & SDMMC_INT_SDIO(i)) {
-				mci_writel(host, RINTSTS, SDMMC_INT_SDIO(i));
+			if (pending & SDMMC_INT_SDIO(slot->sdio_id)) {
+				mci_writel(host, RINTSTS,
+					   SDMMC_INT_SDIO(slot->sdio_id));
 				mmc_signal_sdio_irq(slot->mmc);
 			}
 		}
@@ -2252,6 +2253,7 @@ static int dw_mci_init_slot(struct dw_mci *host, unsigned int id)
 
 	slot = mmc_priv(mmc);
 	slot->id = id;
+	slot->sdio_id = host->sdio_id0 + id;
 	slot->mmc = mmc;
 	slot->host = host;
 	host->slot[id] = slot;

drivers/mmc/host/dw_mmc.h

@@ -225,6 +225,7 @@ extern int dw_mci_resume(struct dw_mci *host);
  *	with CONFIG_MMC_CLKGATE.
  * @flags: Random state bits associated with the slot.
  * @id: Number of this slot.
+ * @sdio_id: Number of this slot in the SDIO interrupt registers.
  */
 struct dw_mci_slot {
 	struct mmc_host		*mmc;
@@ -244,6 +245,7 @@ struct dw_mci_slot {
 #define DW_MMC_CARD_PRESENT	0
 #define DW_MMC_CARD_NEED_INIT	1
 	int			id;
+	int			sdio_id;
 };
 
 struct dw_mci_tuning_data {

include/linux/mmc/dw_mmc.h

@@ -97,6 +97,7 @@ struct mmc_data;
  * @quirks: Set of quirks that apply to specific versions of the IP.
  * @irq_flags: The flags to be passed to request_irq.
  * @irq: The irq value to be passed to request_irq.
+ * @sdio_id0: Number of slot0 in the SDIO interrupt registers.
  *
  * Locking
  * =======
@@ -193,6 +194,8 @@ struct dw_mci {
 	bool			vqmmc_enabled;
 	unsigned long		irq_flags; /* IRQ flags */
 	int			irq;
+
+	int			sdio_id0;
 };
 
 /* DMA ops for Internal/External DMAC interface */