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Message-id: <54534C17.7050703@samsung.com>
Date: Fri, 31 Oct 2014 17:45:11 +0900
From: Jaehoon Chung <jh80.chung@...sung.com>
To: Addy Ke <addy.ke@...k-chips.com>, 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,
ulf.hansson@...aro.org, dinguyen@...era.com, heiko@...ech.de,
olof@...om.net, dianders@...omium.org, sonnyrao@...omium.org
Cc: 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 v2] mmc: dw_mmc: add support for the other bit of sdio
interrupt
Hi, Addy.
On 10/31/2014 12:50 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>;
I have a question. (It's not important question)
You mentioned the sdio-irq bit used from 24 to 31, right?
Then what interrupts are used from 16 to 23 at RK3288? Just reserved?
Best Regards,
Jaehoon Chung
>
> Signed-off-by: Addy Ke <addy.ke@...k-chips.com>
> ---
> Changes in v2:
> - rebase on http://git.linaro.org/git/people/ulf.hansson/mmc.git, next branch
>
> 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 bbb4ec3..1cb3bc6 100644
> --- a/drivers/mmc/host/dw_mmc-rockchip.c
> +++ b/drivers/mmc/host/dw_mmc-rockchip.c
> @@ -68,6 +68,18 @@ 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,
> };
> @@ -76,6 +88,7 @@ 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 bb46b1b..a633b58 100644
> --- a/drivers/mmc/host/dw_mmc.c
> +++ b/drivers/mmc/host/dw_mmc.c
> @@ -823,7 +823,7 @@ 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);
>
> @@ -1184,10 +1184,10 @@ 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)));
> }
> }
>
> @@ -2056,8 +2056,9 @@ 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);
> }
> }
> @@ -2145,6 +2146,7 @@ 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 71d4995..0562f10 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.
> */
> struct dw_mci_slot {
> struct mmc_host *mmc;
> @@ -233,6 +234,7 @@ struct dw_mci_slot {
> #define DW_MMC_CARD_PRESENT 0
> #define DW_MMC_CARD_NEED_INIT 1
> int id;
> + int sdio_id;
> };
>
> struct dw_mci_tuning_data {
> diff --git a/include/linux/mmc/dw_mmc.h b/include/linux/mmc/dw_mmc.h
> index 69d0814..72c319f 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
> * =======
> @@ -191,6 +192,8 @@ struct dw_mci {
> bool vqmmc_enabled;
> unsigned long irq_flags; /* IRQ flags */
> int irq;
> +
> + int sdio_id0;
> };
>
> /* DMA ops for Internal/External DMAC interface */
>
--
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