On Thu, Apr 22, 2010 at 12:38 AM, Tony Lindgren <tony@xxxxxxxxxxx> wrote:
> * kishore kadiyala <kishore.kadiyala@xxxxxx> [100421 11:16]:
>> Since OMAP4's card detection doesn't support GPIO,this patch
>> basically moves card detection API from driver to Board file so
>> that it can handle in both GPIO and NON-GPIO case.
>> This Patch also adds a flag which can differentiate whether the
>> card-detect line is GPIO or NON-GPIO.
>>
>> Signed-off-by: Kishore Kadiyala <kishore.kadiyala@xxxxxx>
>> ---
>> arch/arm/mach-omap2/board-4430sdp.c | 1 +
>> arch/arm/mach-omap2/hsmmc.c | 74 +++++++++++++++++++++++++++++++++
>> arch/arm/mach-omap2/hsmmc.h | 1 +
>> arch/arm/plat-omap/include/plat/mmc.h | 3 +-
>> drivers/mmc/host/omap_hsmmc.c | 29 +-----------
>> 5 files changed, 81 insertions(+), 27 deletions(-)
>>
>> diff --git a/arch/arm/mach-omap2/board-4430sdp.c b/arch/arm/mach-omap2/board-4430sdp.c
>> index eae7c80..4e8f74e 100644
>> --- a/arch/arm/mach-omap2/board-4430sdp.c
>> +++ b/arch/arm/mach-omap2/board-4430sdp.c
>> @@ -89,6 +89,7 @@ static struct omap2_hsmmc_info mmc[] = {
>> * but is a phoenix interrupt
>> */
>> .gpio_cd = 384,
>> + .cd_type = true,
>> .gpio_wp = -EINVAL,
>> },
>> {
>> diff --git a/arch/arm/mach-omap2/hsmmc.c b/arch/arm/mach-omap2/hsmmc.c
>> index 9ad2295..ca3d4c9 100644
>> --- a/arch/arm/mach-omap2/hsmmc.c
>> +++ b/arch/arm/mach-omap2/hsmmc.c
>> @@ -13,6 +13,8 @@
>> #include <linux/slab.h>
>> #include <linux/string.h>
>> #include <linux/delay.h>
>> +#include <linux/gpio.h>
>> +#include <linux/i2c/twl.h>
>> #include <mach/hardware.h>
>> #include <plat/control.h>
>> #include <plat/mmc.h>
>> @@ -27,7 +29,11 @@ static u16 control_devconf1_offset;
>>
>> #define HSMMC_NAME_LEN 9
>>
>> +/* Phoenix Registers */
>> +#define TWL6030_MMCCTRL 0xEE
>
> This define belongs to the twl code.
Agreed.
>
>> static struct hsmmc_controller {
>> + struct omap_mmc_platform_data *mmc;
>> char name[HSMMC_NAME_LEN + 1];
>> } hsmmc[OMAP34XX_NR_MMC];
>>
>> @@ -42,6 +48,50 @@ static int hsmmc_get_context_loss(struct device *dev)
>> #define hsmmc_get_context_loss NULL
>> #endif
>>
>> +static int twl_mmc_get_cover_state(struct device *dev, int slot)
>> +{
>> + struct omap_mmc_platform_data *mmc = dev->platform_data;
>> +
>> + /* NOTE: assumes card detect signal is active-low */
>> + return !gpio_get_value_cansleep(mmc->slots[0].switch_pin);
>> +}
>> +
>> +static int twl_mmc_card_detect(int irq)
>> +{
>> + unsigned i;
>> + u8 read_reg;
>> + unsigned res;
>> +
>> +
>> + for (i = 0; i < ARRAY_SIZE(hsmmc); i++) {
>> + struct omap_mmc_platform_data *mmc;
>> +
>> + mmc = hsmmc[i].mmc;
>> + if (!mmc)
>> + continue;
>> + if (irq != mmc->slots[0].card_detect_irq)
>> + continue;
>> +
>> + if (mmc->slots[0].nongpio_cd) {
>> + /* BIT0 of REG_MMC_CTRL
>> + * 0 - Card not present
>> + * 1 - Card present
>> + */
>> + res = twl_i2c_read_u8(TWL6030_MODULE_ID0,
>> + &read_reg, TWL6030_MMCCTRL);
>> + if (res >= 0)
>> + return read_reg & 0x1;
>> + return !gpio_get_value_cansleep
>> + (mmc->slots[0].switch_pin);
>> + } else {
>> + /* NOTE: assumes card detect signal is active-low */
>> + return !gpio_get_value_cansleep
>> + (mmc->slots[0].switch_pin);
>> + }
>> + }
>> + return -ENOSYS;
>> +}
>
> You should just register a separate twl_card_detect function during init
> instead of doing these tests over and over again.
Agreed.
>
>> static void hsmmc1_before_set_reg(struct device *dev, int slot,
>> int power_on, int vdd)
>> {
>> @@ -189,8 +239,32 @@ void __init omap2_hsmmc_init(struct omap2_hsmmc_info
>> mmc->get_context_loss_count = hsmmc_get_context_loss;
>>
>> mmc->slots[0].switch_pin = c->gpio_cd;
>> + mmc->slots[0].nongpio_cd = c->cd_type;
>> mmc->slots[0].gpio_wp = c->gpio_wp;
>>
>> + /* TWL Card detect can be GPIO based or NON-GPIO Based */
>> + if (!c->cd_type) {
>> + if (gpio_is_valid(c->gpio_cd)) {
>> + mmc->slots[0].card_detect_irq =
>> + gpio_to_irq(c->gpio_cd);
>> + if (c->cover_only)
>> + mmc->slots[0].get_cover_state =
>> + twl_mmc_get_cover_state;
>> + else
>> + mmc->slots[0].card_detect =
>> + twl_mmc_card_detect;
>> + } else
>> + mmc->slots[0].switch_pin = -EINVAL;
>> + } else {
>> + mmc->slots[0].card_detect_irq = c->gpio_cd;
>> + if (c->cover_only)
>> + mmc->slots[0].get_cover_state =
>> + twl_mmc_get_cover_state;
>> + else
>> + mmc->slots[0].card_detect =
>> + twl_mmc_card_detect;
>> + }
>> +
>> mmc->slots[0].remux = c->remux;
>>
>> if (c->cover_only)
>
> Once you register separate twl_card_detect during init, this part will
> not be needed.
Agreed
>
>> diff --git a/arch/arm/mach-omap2/hsmmc.h b/arch/arm/mach-omap2/hsmmc.h
>> index 36f0ba8..3dfc43a 100644
>> --- a/arch/arm/mach-omap2/hsmmc.h
>> +++ b/arch/arm/mach-omap2/hsmmc.h
>> @@ -17,6 +17,7 @@ struct omap2_hsmmc_info {
>> bool no_off; /* power_saving and power is not to go off */
>> bool vcc_aux_disable_is_sleep; /* Regulator off remapped to sleep */
>> int gpio_cd; /* or -EINVAL */
>> + bool cd_type; /* Card detect Type:NON-GPIO=true,GPIO=flase */
>> int gpio_wp; /* or -EINVAL */
>> char *name; /* or NULL for default */
>> struct device *dev; /* returned: pointer to mmc adapter */
>> diff --git a/arch/arm/plat-omap/include/plat/mmc.h b/arch/arm/plat-omap/include/plat/mmc.h
>> index a1bac07..521decc 100644
>> --- a/arch/arm/plat-omap/include/plat/mmc.h
>> +++ b/arch/arm/plat-omap/include/plat/mmc.h
>> @@ -103,6 +103,7 @@ struct omap_mmc_platform_data {
>> unsigned vcc_aux_disable_is_sleep:1;
>>
>> int switch_pin; /* gpio (card detect) */
>> + unsigned nongpio_cd:1; /* NON-GPIO=true , GPIO=false */
>> int gpio_wp; /* gpio (write protect) */
>>
>> int (*set_bus_mode)(struct device *dev, int slot, int bus_mode);
>> @@ -132,7 +133,7 @@ struct omap_mmc_platform_data {
>>
>> /* Card detection IRQs */
>> int card_detect_irq;
>> - int (*card_detect)(struct device *dev, int slot);
>> + int (*card_detect)(int irq);
>>
>> unsigned int ban_openended:1;
>>
>
> Why are you removing *dev from card_detect?
My fault and will retain in next version
>
> Will comment further after that all is fixed. Please also make sure
> omap_hsmmc.c compiles and works as a module.
Sure will test omap_hsmmc.c as module .
Regards,
Kishore
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