diff options
| author | Kishore Kadiyala <kishore.kadiyala@ti.com> | 2010-05-19 19:16:16 +0530 |
|---|---|---|
| committer | Santosh Shilimkar <santosh.shilimkar@ti.com> | 2010-05-19 19:33:08 +0530 |
| commit | ea74e6a3b89dca933b4f845f150b2d5d77b89b25 (patch) | |
| tree | 780217466457e54f8428264d6ca24f698bd91b05 /include | |
| parent | f2175956eb633d5ae0f81f9b3f2da384c8979531 (diff) | |
OMAP4 HSMMC: Adding Card detect support for MMC1
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@ti.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/i2c/twl.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/include/linux/i2c/twl.h b/include/linux/i2c/twl.h index fb6784e86d5f..ce67b9a65626 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; +} + /*----------------------------------------------------------------------*/ /* |