ARM: OMAP: HSMMC: enable use as a module

When building as a module, the board support code (which is compiled
in) cannot directly call the driver code (which may be in a module.)

This patch the separates the card-detect IRQ usage into board-specific
code and driver code, and adds a couple slot-specific items to the MMC
platform data.

Tested on 3430SDP ES2.
Signed-off-by: Kevin Hilman <khilman@mvista.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/board-sdp-hsmmc.c

@@ -19,7 +19,7 @@
 #include <asm/arch/board.h>
 #include <asm/io.h>
 
-#ifdef CONFIG_MMC_OMAP_HS
+#if defined(CONFIG_MMC_OMAP_HS) || defined(CONFIG_MMC_OMAP_HS_MODULE)
 
 #define VMMC1_DEV_GRP		0x27
 #define P1_DEV_GRP		0x20
@@ -35,13 +35,9 @@
 #define MMC1_CD_IRQ		0
 #define MMC2_CD_IRQ		1
 
-static irqreturn_t mmc_omap_cd_handler(int irq, void *dev_id)
+static int sdp_mmc_card_detect(int irq)
 {
-	int detect;
-
-	detect = twl4030_get_gpio_datain(MMC1_CD_IRQ);
-	omap_mmc_notify_card_detect(dev_id, 0, detect);
-	return IRQ_HANDLED;
+	return twl4030_get_gpio_datain(irq - IH_TWL4030_GPIO_BASE);
 }
 
 /*
@@ -72,11 +68,6 @@ static int sdp_mmc_late_init(struct device *dev)
 	if (ret != 0)
 		goto err;
 
-	ret = request_irq(TWL4030_GPIO_IRQ_NO(MMC1_CD_IRQ),
-		mmc_omap_cd_handler, IRQF_DISABLED, "MMC1_CD_IRQ", dev);
-	if (ret < 0)
-		goto err;
-
 	return ret;
 err:
 	dev_err(dev, "Failed to configure TWL4030 GPIO IRQ\n");
@@ -89,7 +80,6 @@ static void sdp_mmc_cleanup(struct device *dev)
 	int ret = 0;
 
 	ret = twl4030_free_gpio(MMC1_CD_IRQ);
-	free_irq(TWL4030_GPIO_IRQ_NO(MMC1_CD_IRQ), dev);
 	if (ret != 0)
 		dev_err(dev, "Failed to configure TWL4030 GPIO IRQ\n");
 }
@@ -259,6 +249,9 @@ static struct omap_mmc_platform_data sdp_mmc_data = {
 		.ocr_mask		= MMC_VDD_32_33 | MMC_VDD_33_34 |
 						MMC_VDD_165_195,
 		.name			= "first slot",
+
+		.card_detect_irq        = TWL4030_GPIO_IRQ_NO(MMC1_CD_IRQ),
+		.card_detect            = sdp_mmc_card_detect,
 	},
 };
 

drivers/mmc/host/omap_hsmmc.c

@@ -432,11 +432,14 @@ static void mmc_omap_detect(struct work_struct *work)
 /*
  * ISR for handling card insertion and removal
  */
-void omap_mmc_notify_card_detect(struct device *dev, int slot, int detected)
+static irqreturn_t omap_mmc_cd_handler(int irq, void *dev_id)
 {
-	struct mmc_omap_host *host = dev_get_drvdata(dev);
-	host->carddetect = detected;
+	struct mmc_omap_host *host = (struct mmc_omap_host *)dev_id;
+
+	host->carddetect = mmc_slot(host).card_detect(irq);
 	schedule_work(&host->mmc_carddetect_work);
+
+	return IRQ_HANDLED;
 }
 
 /*
@@ -797,9 +800,23 @@ static int __init omap_mmc_probe(struct platform_device *pdev)
 		goto irq_err;
 	}
 
+	/* Request IRQ for card detect */
+	if ((mmc_slot(host).card_detect_irq) && (mmc_slot(host).card_detect)) {
+		ret = request_irq(mmc_slot(host).card_detect_irq,
+				  omap_mmc_cd_handler, IRQF_DISABLED, "MMC CD",
+				  host);
+		if (ret) {
+			dev_dbg(mmc_dev(host->mmc),
+				"Unable to grab MMC CD IRQ");
+			free_irq(host->irq, host);
+			goto irq_err;
+		}
+	}
+
 	INIT_WORK(&host->mmc_carddetect_work, mmc_omap_detect);
 	if (pdata->init != NULL) {
 		if (pdata->init(&pdev->dev) != 0) {
+			free_irq(mmc_slot(host).card_detect_irq, host);
 			free_irq(host->irq, host);
 			goto irq_err;
 		}
@@ -843,6 +860,8 @@ static int omap_mmc_remove(struct platform_device *pdev)
 	if (host) {
 		host->pdata->cleanup(&pdev->dev);
 		free_irq(host->irq, host);
+		if (mmc_slot(host).card_detect_irq)
+			free_irq(mmc_slot(host).card_detect_irq, host);
 		flush_scheduled_work();
 
 		clk_disable(host->fclk);

include/asm-arm/arch-omap/mmc.h

@@ -55,13 +55,16 @@ struct omap_mmc_platform_data {
 
 		const char *name;
 		u32 ocr_mask;
+
+		/* Card detection IRQs */
+		int card_detect_irq;
+		int (* card_detect)(int irq);
 	} slots[OMAP_MMC_MAX_SLOTS];
 };
 
 extern void omap_set_mmc_info(int host, const struct omap_mmc_platform_data *info);
 
 /* called from board-specific card detection service routine */
-extern void omap_mmc_notify_card_detect(struct device *dev, int slot, int detected);
 extern void omap_mmc_notify_cover_event(struct device *dev, int slot, int is_closed);
 
 #endif