Adding card detect callback function and card detect configuration function for MMC1 Controller. Card detect configuration function does initial configuration of the MMC Control & PullUp-PullDown registers of Phoenix. For MMC1 Controller, Card detect interrupt source is twl6030 and the card detect call back function provides card present/absent status by reading MMC Control register. Signed-off-by: Kishore Kadiyala <kishore.kadiyala@xxxxxx> Cc: Tony Lindgren <tony@xxxxxxxxxxx> Cc: Madhusudhan Chikkature <madhu.cr@xxxxxx> Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx> --- V5: https://patchwork.kernel.org/patch/106697/ https://patchwork.kernel.org/patch/106698/ V4: http://www.mail-archive.com/linux-mmc@xxxxxxxxxxxxxxx/msg01958.html http://www.mail-archive.com/linux-mmc@xxxxxxxxxxxxxxx/msg01949.html arch/arm/mach-omap2/board-4430sdp.c | 7 +++- drivers/mfd/twl6030-irq.c | 76 +++++++++++++++++++++++++++++++++++ drivers/mmc/host/omap_hsmmc.c | 4 +- include/linux/i2c/twl.h | 16 +++++++ 4 files changed, 100 insertions(+), 3 deletions(-) diff --git a/arch/arm/mach-omap2/board-4430sdp.c b/arch/arm/mach-omap2/board-4430sdp.c index f287461..388b96d 100644 --- a/arch/arm/mach-omap2/board-4430sdp.c +++ b/arch/arm/mach-omap2/board-4430sdp.c @@ -227,9 +227,14 @@ 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 10bf228..c027692 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 +224,81 @@ 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 */ + 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 + */ + ret = twl_i2c_read_u8(TWL6030_MODULE_ID0, ®_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) { + return ret; + pr_err("twl6030: Failed to write MMCCTRL, error %d\n", ret); + } + + /* Configuring PullUp-PullDown register */ + ret = twl_i2c_read_u8(TWL6030_MODULE_ID0, ®_val, + TWL6030_CFG_INPUT_PUPD3); + if (ret < 0) { + return ret; + pr_err("twl6030: Failed to read CFG_INPUT_PUPD3, error %d\n", + 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; + struct platform_device *pdev = container_of(dev, + struct platform_device, dev); + + switch (pdev->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", pdev->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 b032828..c047b13 100644 --- a/drivers/mmc/host/omap_hsmmc.c +++ b/drivers/mmc/host/omap_hsmmc.c @@ -464,8 +464,6 @@ 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; @@ -2170,6 +2168,8 @@ 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 6de90bf..9493292 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 +183,12 @@ 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 */ +int twl6030_mmc_card_detect_config(void); + +/* MMC1 Controller on OMAP4 uses Phoenix irq for Card detect */ +int twl6030_mmc_card_detect(struct device *dev, int slot); + /*----------------------------------------------------------------------*/ /* -- 1.6.3.3 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
