Adds card detect callback function which gives the status of
the card .For MMC1 Controller, Card detect interrupt is provided
by twl6030 and card status is provided by MMCCTRL reg of twl6030.
Signed-off-by: Kishore Kadiyala <kishore.kadiyala@xxxxxx>
---
arch/arm/mach-omap2/board-4430sdp.c | 9 +++++-
arch/arm/mach-omap2/hsmmc.c | 1 +
arch/arm/plat-omap/include/plat/mmc.h | 1 +
drivers/mfd/twl6030-irq.c | 23 ++++++++++++++++
drivers/mmc/host/omap_hsmmc.c | 31 ++++++++++++++++++---
include/linux/i2c/twl.h | 47 +++++++++++++++++++++++++++++++++
6 files changed, 105 insertions(+), 7 deletions(-)
diff --git a/arch/arm/mach-omap2/board-4430sdp.c b/arch/arm/mach-omap2/board-4430sdp.c
index e4a5d66..eb4545e 100644
--- a/arch/arm/mach-omap2/board-4430sdp.c
+++ b/arch/arm/mach-omap2/board-4430sdp.c
@@ -144,6 +144,7 @@ static struct omap2_hsmmc_info mmc[] = {
{
.mmc = 1,
.wires = 8,
+ .cd_type = NON_GPIO,
.gpio_wp = -EINVAL,
},
{
@@ -174,10 +175,14 @@ static int omap4_twl6030_hsmmc_late_init(struct device *dev)
struct platform_device, dev);
struct omap_mmc_platform_data *pdata = dev->platform_data;
- /* Setting MMC1 Card detect Irq */
- if (pdev->id == 0)
+ /* MMC1 Card detect Configuration */
+ if (pdev->id == 0) {
+ ret = omap4_hsmmc1_card_detect_config();
+ if (ret < 0)
+ pr_err("Unable to configure Card detect for MMC1\n");
pdata->slots[0].card_detect_irq = TWL6030_IRQ_BASE +
MMCDETECT_INTR_OFFSET;
+ }
return ret;
}
diff --git a/arch/arm/mach-omap2/hsmmc.c b/arch/arm/mach-omap2/hsmmc.c
index 1ef54b0..8a8f7b1 100644
--- a/arch/arm/mach-omap2/hsmmc.c
+++ b/arch/arm/mach-omap2/hsmmc.c
@@ -265,6 +265,7 @@ void __init omap2_hsmmc_init(struct omap2_hsmmc_info *controllers)
mmc->get_context_loss_count = hsmmc_get_context_loss;
mmc->slots[0].switch_pin = c->gpio_cd;
+ mmc->slots[0].cd_type = c->cd_type;
mmc->slots[0].gpio_wp = c->gpio_wp;
mmc->slots[0].remux = c->remux;
diff --git a/arch/arm/plat-omap/include/plat/mmc.h b/arch/arm/plat-omap/include/plat/mmc.h
index ed60c0f..cd42c77 100644
--- a/arch/arm/plat-omap/include/plat/mmc.h
+++ b/arch/arm/plat-omap/include/plat/mmc.h
@@ -14,6 +14,7 @@
#include <linux/types.h>
#include <linux/device.h>
#include <linux/mmc/host.h>
+#include <linux/i2c/twl.h>
#include <plat/board.h>
diff --git a/drivers/mfd/twl6030-irq.c b/drivers/mfd/twl6030-irq.c
index 10bf228..ca8b30b 100644
--- a/drivers/mfd/twl6030-irq.c
+++ b/drivers/mfd/twl6030-irq.c
@@ -223,6 +223,29 @@ int twl6030_interrupt_mask(u8 bit_mask, u8 offset)
}
EXPORT_SYMBOL(twl6030_interrupt_mask);
+int twl6030_mmc_card_detect(int host_id, int slot)
+{
+ int ret = -ENOSYS;
+ u8 read_reg;
+
+ switch (host_id) {
+ case 0:
+ /*
+ * BIT0 of REG_MMC_CTRL
+ * 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;
+ break;
+ default:
+ pr_err("Unkown MMC controller %d in %s\n", host_id, __func__);
+ }
+ 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 e9caf69..e25db63 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -190,9 +190,16 @@ struct omap_hsmmc_host {
static int omap_hsmmc_card_detect(struct device *dev, int slot)
{
struct omap_mmc_platform_data *mmc = dev->platform_data;
+ struct platform_device *pdev = container_of(dev,
+ struct platform_device, dev);
+ int ret = -ENOSYS;
- /* NOTE: assumes card detect signal is active-low */
- return !gpio_get_value_cansleep(mmc->slots[0].switch_pin);
+ if (mmc->slots[0].cd_type == GPIO)
+ /* NOTE: assumes card detect signal is active-low */
+ ret = !gpio_get_value_cansleep(mmc->slots[0].switch_pin);
+ else
+ ret = twl6030_mmc_card_detect(pdev->id, slot);
+ return ret;
}
static int omap_hsmmc_get_wp(struct device *dev, int slot)
@@ -465,8 +472,6 @@ 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;
@@ -505,6 +510,16 @@ err_free_sp:
return ret;
}
+static int omap_hsmmc_non_gpio_init(struct omap_mmc_platform_data *pdata)
+{
+
+ if (pdata->slots[0].switch_pin > 0) {
+ pdata->slots[0].card_detect = omap_hsmmc_card_detect;
+ pdata->slots[0].card_detect_irq = pdata->slots[0].switch_pin;
+ }
+ return 0;
+}
+
static void omap_hsmmc_gpio_free(struct omap_mmc_platform_data *pdata)
{
if (gpio_is_valid(pdata->slots[0].gpio_wp))
@@ -1977,7 +1992,11 @@ static int __init omap_hsmmc_probe(struct platform_device *pdev)
if (res == NULL)
return -EBUSY;
- ret = omap_hsmmc_gpio_init(pdata);
+ if (pdata->slots[0].cd_type == GPIO)
+ ret = omap_hsmmc_gpio_init(pdata);
+ else
+ ret = omap_hsmmc_non_gpio_init(pdata);
+
if (ret)
goto err;
@@ -2160,6 +2179,8 @@ 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_WRITE(host->base, ISE, INT_EN_MASK);
diff --git a/include/linux/i2c/twl.h b/include/linux/i2c/twl.h
index fb6784e..ce67b9a 100644
--- a/include/linux/i2c/twl.h
+++ b/include/linux/i2c/twl.h
@@ -141,6 +141,15 @@
#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 +182,44 @@ 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);
+/* MMC1 Controller on OMAP4 uses Phoenix Irq for Card detect */
+int twl6030_mmc_card_detect(int host_id, int slot);
+
+/* Configuring Card Detect for MMC1 */
+static inline int omap4_hsmmc1_card_detect_config(void)
+{
+ int res = -1;
+ u8 reg_val = 0;
+
+ /* Unmasking the Card detect Interrupt line for MMC1 from Phoenix */
+ if (twl_class_is_6030()) {
+ 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
+ */
+ res = twl_i2c_read_u8(TWL6030_MODULE_ID0, ®_val, TWL6030_MMCCTRL);
+ if (res < 0)
+ return res;
+ reg_val &= ~VMMC_AUTO_OFF;
+ reg_val |= SW_FC;
+ twl_i2c_write_u8(TWL6030_MODULE_ID0, reg_val, TWL6030_MMCCTRL);
+
+ res = twl_i2c_read_u8(TWL6030_MODULE_ID0, ®_val,
+ TWL6030_CFG_INPUT_PUPD3);
+ if (res < 0)
+ return res;
+ reg_val &= ~(MMC_PU | MMC_PD);
+ twl_i2c_write_u8(TWL6030_MODULE_ID0, reg_val,
+ TWL6030_CFG_INPUT_PUPD3);
+ return res;
+}
+
/*----------------------------------------------------------------------*/
/*
--
1.6.3.3
--
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