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Message-ID: <5452DDD2.9000909@rock-chips.com>
Date: Fri, 31 Oct 2014 08:54:42 +0800
From: addy ke <addy.ke@...k-chips.com>
To: jh80.chung@...sung.com, ulf.hansson@...aro.org
CC: robh+dt@...nel.org, pawel.moll@....com, mark.rutland@....com,
ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
rdunlap@...radead.org, tgih.jun@...sung.com, chris@...ntf.net,
dinguyen@...era.com, heiko@...ech.de, olof@...om.net,
dianders@...omium.org, sonnyrao@...omium.org,
devicetree@...r.kernel.org, linux-doc@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-mmc@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-rockchip@...ts.infradead.org, zhenfu.fang@...k-chips.com,
cf@...k-chips.com, lintao@...k-chips.com, chenfen@...k-chips.com,
zyf@...k-chips.com, xjq@...k-chips.com, huangtao@...k-chips.com,
zyw@...k-chips.com, yzq@...k-chips.com, hj@...k-chips.com,
kever.yang@...k-chips.com, zhangqing@...k-chips.com,
hl@...k-chips.com
Subject: Re: [PATCH] mmc: dw_mmc: add support for the other bit of sdio interrupt
On 2014/10/30 19:17, Jaehoon Chung wrote:
> On 10/30/2014 08:11 PM, Ulf Hansson wrote:
>> On 30 October 2014 11:50, Addy Ke <addy.ke@...k-chips.com> 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.
sure, it is denpends on rockchip soc, not IP version.
As far as I know, only our socs(such as RK3288) have this difference.
>
> Best Regards,
> Jaehoon Chung
>
>>
>> Kind regards
>> Uffe
>>
>>>
>>> Signed-off-by: Addy Ke <addy.ke@...k-chips.com>
>>> ---
>>> 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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