[PATCH v4 1/4] omap4 hsmmc: Adding card detect support for MMC1
kishore kadiyala
kishorek.kadiyala at gmail.com
Fri Oct 1 02:59:48 EDT 2010
Ping !!
On Wed, Sep 29, 2010 at 4:11 PM, kishore kadiyala
<kishorek.kadiyala at gmail.com> wrote:
> Gentle Reminder !
>
> Regards,
> Kishore
>
> On Tue, Sep 28, 2010 at 12:22 PM, kishore kadiyala
> <kishorek.kadiyala at gmail.com> wrote:
>> Hi Samuel,
>>
>> Could you please review this patch which touches mfd/twl6030-irq.c for
>> card detect support
>> of MMC1 controller on OMAP4.
>>
>> Regards,
>> Kishore
>>
>> On Mon, Sep 27, 2010 at 1:25 PM, kishore kadiyala
>> <kishorek.kadiyala at gmail.com> wrote:
>>> Cc: Samuel Ortiz <sameo at linux.intel.com>
>>>
>>> On Fri, Sep 24, 2010 at 10:43 PM, kishore kadiyala
>>> <kishore.kadiyala at ti.com> wrote:
>>>> Adding card detect callback function and card detect configuration
>>>> function for MMC1 Controller on OMAP4.
>>>>
>>>> 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 which is non-gpio. The card detect call back function provides
>>>> card present/absent status by reading MMC Control register present
>>>> on twl6030.
>>>>
>>>> Since OMAP4 doesn't use any GPIO line as used in OMAP3 for card detect,
>>>> the suspend/resume initialization which was done in omap_hsmmc_gpio_init
>>>> previously is moved to the probe thus making it generic for both OMAP3 & OMAP4.
>>>>
>>>> Cc: Tony Lindgren <tony at atomide.com>
>>>> Cc: Andrew Morton <akpm at linux-foundation.org>
>>>> Cc: Madhusudhan Chikkature <madhu.cr at ti.com>
>>>> Cc: Adrian Hunter <adrian.hunter at nokia.com>
>>>> Signed-off-by: Kishore Kadiyala <kishore.kadiyala at ti.com>
>>>> ---
>>>> arch/arm/mach-omap2/board-4430sdp.c | 7 +++-
>>>> drivers/mfd/twl6030-irq.c | 73 +++++++++++++++++++++++++++++++++++
>>>> drivers/mmc/host/omap_hsmmc.c | 4 +-
>>>> include/linux/i2c/twl.h | 31 +++++++++++++++
>>>> 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 9447644..a49f285 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..2d3bb82 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, ®_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, ®_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 562dbbb..a51894d 100644
>>>> --- a/drivers/mmc/host/omap_hsmmc.c
>>>> +++ b/drivers/mmc/host/omap_hsmmc.c
>>>> @@ -466,8 +466,6 @@ 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;
>>>> @@ -2211,6 +2209,8 @@ 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..e64894c 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
>>>> /*----------------------------------------------------------------------*/
>>>>
>>>> /*
>>>> --
>>>> 1.7.0.4
>>>>
>>>>
>>>> --
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>>>
>>
>
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