4 files changed, 112 insertions, 3 deletions

diff --git a/arch/arm/mach-omap2/board-4430sdp.c b/arch/arm/mach-omap2/board-4430sdp.c
index 69a4ae971e41..df5a425a49d1 100644
--- a/arch/arm/mach-omap2/board-4430sdp.c
+++ b/arch/arm/mach-omap2/board-4430sdp.c
@@ -269,9 +269,14 @@ static int omap4_twl6030_hsmmc_late_init(struct device *dev)
         struct omap_mmc_platform_data *pdata = dev->platform_data;
 
         /* Setting MMC1 Card detect Irq */
-        if (pdev->id == 0)
+        if (pdev->id == 0) {
+                ret = twl6030_mmc_card_detect_config();
+                if (ret)
+                        pr_err("Failed configuring MMC1 card detect\n");
                 pdata->slots[0].card_detect_irq = TWL6030_IRQ_BASE +
                                                 MMCDETECT_INTR_OFFSET;
+                pdata->slots[0].card_detect = twl6030_mmc_card_detect;
+        }
         return ret;
 }
 
diff --git a/drivers/mfd/twl6030-irq.c b/drivers/mfd/twl6030-irq.c
index 10bf228ad626..2d3bb82dbf24 100644
--- a/drivers/mfd/twl6030-irq.c
+++ b/drivers/mfd/twl6030-irq.c
@@ -36,6 +36,7 @@
 #include <linux/irq.h>
 #include <linux/kthread.h>
 #include <linux/i2c/twl.h>
+#include <linux/platform_device.h>
 
 /*
  * TWL6030 (unlike its predecessors, which had two level interrupt handling)
@@ -223,6 +224,78 @@ int twl6030_interrupt_mask(u8 bit_mask, u8 offset)
 }
 EXPORT_SYMBOL(twl6030_interrupt_mask);
 
+int twl6030_mmc_card_detect_config(void)
+{
+        int ret;
+        u8 reg_val = 0;
+
+        /* Unmasking the Card detect Interrupt line for MMC1 from Phoenix */
+        twl6030_interrupt_unmask(TWL6030_MMCDETECT_INT_MASK,
+                                                REG_INT_MSK_LINE_B);
+        twl6030_interrupt_unmask(TWL6030_MMCDETECT_INT_MASK,
+                                                REG_INT_MSK_STS_B);
+        /*
+         * Intially Configuring MMC_CTRL for receving interrupts &
+         * Card status on TWL6030 for MMC1
+         */
+        ret = twl_i2c_read_u8(TWL6030_MODULE_ID0, &reg_val, TWL6030_MMCCTRL);
+        if (ret < 0) {
+                pr_err("twl6030: Failed to read MMCCTRL, error %d\n", ret);
+                return ret;
+        }
+        reg_val &= ~VMMC_AUTO_OFF;
+        reg_val |= SW_FC;
+        ret = twl_i2c_write_u8(TWL6030_MODULE_ID0, reg_val, TWL6030_MMCCTRL);
+        if (ret < 0) {
+                pr_err("twl6030: Failed to write MMCCTRL, error %d\n", ret);
+                return ret;
+        }
+
+        /* Configuring PullUp-PullDown register */
+        ret = twl_i2c_read_u8(TWL6030_MODULE_ID0, &reg_val,
+                                                TWL6030_CFG_INPUT_PUPD3);
+        if (ret < 0) {
+                pr_err("twl6030: Failed to read CFG_INPUT_PUPD3, error %d\n",
+                                                                        ret);
+                return ret;
+        }
+        reg_val &= ~(MMC_PU | MMC_PD);
+        ret = twl_i2c_write_u8(TWL6030_MODULE_ID0, reg_val,
+                                                TWL6030_CFG_INPUT_PUPD3);
+        if (ret < 0) {
+                pr_err("twl6030: Failed to write CFG_INPUT_PUPD3, error %d\n",
+                                                                        ret);
+                return ret;
+        }
+        return 0;
+}
+EXPORT_SYMBOL(twl6030_mmc_card_detect_config);
+
+int twl6030_mmc_card_detect(struct device *dev, int slot)
+{
+        int ret = -EIO;
+        u8 read_reg = 0;
+        struct platform_device *pdev = to_platform_device(dev);
+
+        if (pdev->id) {
+                /* TWL6030 provide's Card detect support for
+                 * only MMC1 controller.
+                 */
+                pr_err("Unkown MMC controller %d in %s\n", pdev->id, __func__);
+                return ret;
+        }
+        /*
+         * BIT0 of MMC_CTRL on TWL6030 provides card status for MMC1
+         * 0 - Card not present ,1 - Card present
+         */
+        ret = twl_i2c_read_u8(TWL6030_MODULE_ID0, &read_reg,
+                                                TWL6030_MMCCTRL);
+        if (ret >= 0)
+                ret = read_reg & STS_MMC;
+        return ret;
+}
+EXPORT_SYMBOL(twl6030_mmc_card_detect);
+
 int twl6030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end)
 {
 
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index e865032a52eb..82a1079bbdc7 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -483,8 +483,6 @@ static int omap_hsmmc_gpio_init(struct omap_mmc_platform_data *pdata)
         int ret;
 
         if (gpio_is_valid(pdata->slots[0].switch_pin)) {
-                pdata->suspend = omap_hsmmc_suspend_cdirq;
-                pdata->resume = omap_hsmmc_resume_cdirq;
                 if (pdata->slots[0].cover)
                         pdata->slots[0].get_cover_state =
                                         omap_hsmmc_get_cover_state;
@@ -2218,6 +2216,8 @@ static int __init omap_hsmmc_probe(struct platform_device *pdev)
                                 "Unable to grab MMC CD IRQ\n");
                         goto err_irq_cd;
                 }
+                pdata->suspend = omap_hsmmc_suspend_cdirq;
+                pdata->resume = omap_hsmmc_resume_cdirq;
         }
 
         omap_hsmmc_disable_irq(host);
diff --git a/include/linux/i2c/twl.h b/include/linux/i2c/twl.h
index 53089516c17a..c760991b354a 100644
--- a/include/linux/i2c/twl.h
+++ b/include/linux/i2c/twl.h
@@ -141,6 +141,16 @@
 #define TWL6030_CHARGER_CTRL_INT_MASK   0x10
 #define TWL6030_CHARGER_FAULT_INT_MASK  0x60
 
+#define TWL6030_MMCCTRL         0xEE
+#define VMMC_AUTO_OFF                   (0x1 << 3)
+#define SW_FC                           (0x1 << 2)
+#define STS_MMC                 0x1
+
+#define TWL6030_CFG_INPUT_PUPD3 0xF2
+#define MMC_PU                          (0x1 << 3)
+#define MMC_PD                          (0x1 << 2)
+
+
 
 #define TWL4030_CLASS_ID                0x4030
 #define TWL6030_CLASS_ID                0x6030
@@ -173,6 +183,27 @@ int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes);
 int twl6030_interrupt_unmask(u8 bit_mask, u8 offset);
 int twl6030_interrupt_mask(u8 bit_mask, u8 offset);
 
+/* Card detect Configuration for MMC1 Controller on OMAP4 */
+#ifdef CONFIG_TWL4030_CORE
+int twl6030_mmc_card_detect_config(void);
+#else
+static inline int twl6030_mmc_card_detect_config(void)
+{
+        pr_debug("twl6030_mmc_card_detect_config not supported\n");
+        return 0;
+}
+#endif
+
+/* MMC1 Controller on OMAP4 uses Phoenix irq for Card detect */
+#ifdef CONFIG_TWL4030_CORE
+int twl6030_mmc_card_detect(struct device *dev, int slot);
+#else
+static inline int twl6030_mmc_card_detect(struct device *dev, int slot)
+{
+        pr_debug("Call back twl6030_mmc_card_detect not supported\n");
+        return -EIO;
+}
+#endif
 /*----------------------------------------------------------------------*/
 
 /*