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

From: Jaehoon Chung
Date: Thu Oct 30 2014 - 07:18:15 EST

On 10/30/2014 08:11 PM, Ulf Hansson wrote:
> On 30 October 2014 11:50, Addy Ke <addy.ke@xxxxxxxxxxxxxx> 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 <addy.ke@xxxxxxxxxxxxxx>
>> ---
>> 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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