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

From: [email-masked] (Jaehoon Chung)
Date: Thu, 30 Oct 2014 20:17:58 +0900

On 10/30/2014 08:11 PM, Ulf Hansson wrote:
> On 30 October 2014 11:50, Addy Ke <[email-masked]> 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>;
> 
> No, this shouldn't be information in DT.
> 
> Instead this can be kept in the driver, depending on what version of
> the mmc controller that is being used. Right!?

sdio-interrupt slot doesn't depend on IP version.
maybe it depends on rock-chip board.

Best Regards,
Jaehoon Chung

> 
> Kind regards
> Uffe
> 
>>
>> 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 */
>> --
>> 1.8.3.2
>>
>>
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