Re: [PATCH v4 1/4] omap4 hsmmc: Adding card detect support for MMC1

Samuel Ortiz
2010-10-01T11:29:27Z

On Fri, Oct 01, 2010 at 12:29:48PM +0530, kishore kadiyala wrote:
> Ping !!
Applied !!

BTW, please add the full patch when you cc me, so that I don't have to dig
through patchwork to grab something I can git-am.

Cheers,
Samuel.

> On Wed, Sep 29, 2010 at 4:11 PM, kishore kadiyala
> <kishorek.kadiyala@gmail.com> wrote:
> > Gentle Reminder !
> >
> > Regards,
> > Kishore
> >
> > On Tue, Sep 28, 2010 at 12:22 PM, kishore kadiyala
> > <kishorek.kadiyala@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@gmail.com> wrote:
> >>> Cc: Samuel Ortiz <sameo@linux.intel.com>
> >>>
> >>> On Fri, Sep 24, 2010 at 10:43 PM, kishore kadiyala
> >>> <kishore.kadiyala@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@atomide.com>
> >>>> Cc: Andrew Morton <akpm@linux-foundation.org>
> >>>> Cc: Madhusudhan Chikkature <madhu.cr@ti.com>
> >>>> Cc: Adrian Hunter <adrian.hunter@nokia.com>
> >>>> Signed-off-by: Kishore Kadiyala <kishore.kadiyala@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, &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 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
> >>>>
> >>>>
> >>>> --
> >>>> To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
> >>>> the body of a message to majordomo@vger.kernel.org
> >>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> >>>>
> >>>
> >>
> >

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