Subject: [PATCH] mmc: dw_mmc: add support for the other bit of sdio interrupt

From: [email-masked] (addy ke)
Date: Fri, 31 Oct 2014 08:46:15 +0800

Hi, Jaehoon

On 2014/10/30 19:02, Jaehoon Chung wrote:
> Hi, Addy.
> 
> This patch is conflicted..Could you rebase on latest Ulf's tree?
I have not found ulf's tree in git.kernel.org.
I can't 'git clone git://git.kernel.org/pub/scm/linux/kernel/git/ulf/xxx.git'.
So my patch is based on kernel-3.18.
I will send patch v2 for this.
Would you please give me a git url for it?
Thank you.

> 
> Best Regards,
> Jaehoon Chung
> 
> On 10/30/2014 07:50 PM, Addy Ke wrote:
>> The bit of sdio interrupt is 16 in designware implementation,
>> but it is 24 in RK3288. This patch add sdio_id0 for the number
>> of slot0 in the SDIO interrupt registers, which can be set in
>> platform DT table, such as:
>> - rockchip,sdio-interrupt-slot0 = <8>;
>>
>> Signed-off-by: Addy Ke <[email-masked]>
>> ---
>>  drivers/mmc/host/dw_mmc-rockchip.c | 13 +++++++++++++
>>  drivers/mmc/host/dw_mmc.c          | 12 +++++++-----
>>  drivers/mmc/host/dw_mmc.h          |  2 ++
>>  include/linux/mmc/dw_mmc.h         |  3 +++
>>  4 files changed, 25 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/mmc/host/dw_mmc-rockchip.c b/drivers/mmc/host/dw_mmc-rockchip.c
>> index f0c2cb1..54655e7 100644
>> --- a/drivers/mmc/host/dw_mmc-rockchip.c
>> +++ b/drivers/mmc/host/dw_mmc-rockchip.c
>> @@ -65,6 +65,18 @@ static void dw_mci_rk3288_set_ios(struct dw_mci *host, struct mmc_ios *ios)
>>  	}
>>  }
>>  
>> +static int dw_mci_rk3288_parse_dt(struct dw_mci *host)
>> +{
>> +	struct device_node *np = host->dev->of_node;
>> +	int sdio_id0;
>> +
>> +	if (!of_property_read_u32(np, "rockchip,sdio-interrupt-slot0",
>> +				  &sdio_id0))
>> +		host->sdio_id0 = sdio_id0;
>> +
>> +	return 0;
>> +}
>> +
>>  static const struct dw_mci_drv_data rk2928_drv_data = {
>>  	.prepare_command        = dw_mci_rockchip_prepare_command,
>>  };
>> @@ -73,6 +85,7 @@ static const struct dw_mci_drv_data rk3288_drv_data = {
>>  	.prepare_command        = dw_mci_rockchip_prepare_command,
>>  	.set_ios		= dw_mci_rk3288_set_ios,
>>  	.setup_clock    = dw_mci_rk3288_setup_clock,
>> +	.parse_dt	= dw_mci_rk3288_parse_dt,
>>  };
>>  
>>  static const struct of_device_id dw_mci_rockchip_match[] = {
>> diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
>> index 69f0cc6..2ea7467 100644
>> --- a/drivers/mmc/host/dw_mmc.c
>> +++ b/drivers/mmc/host/dw_mmc.c
>> @@ -819,7 +819,7 @@ static void dw_mci_setup_bus(struct dw_mci_slot *slot, bool force_clkinit)
>>  
>>  		/* enable clock; only low power if no SDIO */
>>  		clk_en_a = SDMMC_CLKEN_ENABLE << slot->id;
>> -		if (!(mci_readl(host, INTMASK) & SDMMC_INT_SDIO(slot->id)))
>> +		if (!(mci_readl(host, INTMASK) & SDMMC_INT_SDIO(slot->sdio_id)))
>>  			clk_en_a |= SDMMC_CLKEN_LOW_PWR << slot->id;
>>  		mci_writel(host, CLKENA, clk_en_a);
>>  
>> @@ -1180,10 +1180,10 @@ static void dw_mci_enable_sdio_irq(struct mmc_host *mmc, int enb)
>>  		dw_mci_disable_low_power(slot);
>>  
>>  		mci_writel(host, INTMASK,
>> -			   (int_mask | SDMMC_INT_SDIO(slot->id)));
>> +			   (int_mask | SDMMC_INT_SDIO(slot->sdio_id)));
>>  	} else {
>>  		mci_writel(host, INTMASK,
>> -			   (int_mask & ~SDMMC_INT_SDIO(slot->id)));
>> +			   (int_mask & ~SDMMC_INT_SDIO(slot->sdio_id)));
>>  	}
>>  }
>>  
>> @@ -2035,8 +2035,9 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id)
>>  		/* Handle SDIO Interrupts */
>>  		for (i = 0; i < host->num_slots; i++) {
>>  			struct dw_mci_slot *slot = host->slot[i];
>> -			if (pending & SDMMC_INT_SDIO(i)) {
>> -				mci_writel(host, RINTSTS, SDMMC_INT_SDIO(i));
>> +			if (pending & SDMMC_INT_SDIO(slot->sdio_id)) {
>> +				mci_writel(host, RINTSTS,
>> +					   SDMMC_INT_SDIO(slot->sdio_id));
>>  				mmc_signal_sdio_irq(slot->mmc);
>>  			}
>>  		}
>> @@ -2206,6 +2207,7 @@ static int dw_mci_init_slot(struct dw_mci *host, unsigned int id)
>>  
>>  	slot = mmc_priv(mmc);
>>  	slot->id = id;
>> +	slot->sdio_id = host->sdio_id0 + id;
>>  	slot->mmc = mmc;
>>  	slot->host = host;
>>  	host->slot[id] = slot;
>> diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h
>> index 01b99e8..3e966a9 100644
>> --- a/drivers/mmc/host/dw_mmc.h
>> +++ b/drivers/mmc/host/dw_mmc.h
>> @@ -214,6 +214,7 @@ extern int dw_mci_resume(struct dw_mci *host);
>>   *	with CONFIG_MMC_CLKGATE.
>>   * @flags: Random state bits associated with the slot.
>>   * @id: Number of this slot.
>> + * @sdio_id: Number of this slot in the SDIO interrupt registers.
>>   * @last_detect_state: Most recently observed card detect state.
>>   */
>>  struct dw_mci_slot {
>> @@ -234,6 +235,7 @@ struct dw_mci_slot {
>>  #define DW_MMC_CARD_PRESENT	0
>>  #define DW_MMC_CARD_NEED_INIT	1
>>  	int			id;
>> +	int			sdio_id;
>>  	int			last_detect_state;
>>  };
>>  
>> diff --git a/include/linux/mmc/dw_mmc.h b/include/linux/mmc/dw_mmc.h
>> index 0013669..4c0d3f2 100644
>> --- a/include/linux/mmc/dw_mmc.h
>> +++ b/include/linux/mmc/dw_mmc.h
>> @@ -96,6 +96,7 @@ struct mmc_data;
>>   * @quirks: Set of quirks that apply to specific versions of the IP.
>>   * @irq_flags: The flags to be passed to request_irq.
>>   * @irq: The irq value to be passed to request_irq.
>> + * @sdio_id0: Number of slot0 in the SDIO interrupt registers.
>>   *
>>   * Locking
>>   * =======
>> @@ -193,6 +194,8 @@ struct dw_mci {
>>  	bool			vqmmc_enabled;
>>  	unsigned long		irq_flags; /* IRQ flags */
>>  	int			irq;
>> +
>> +	int			sdio_id0;
>>  };
>>  
>>  /* DMA ops for Internal/External DMAC interface */
>>
> 
> 
> 
>