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Message-id: <5451C004.3050806@samsung.com>
Date: Thu, 30 Oct 2014 13:35:16 +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] mmc: dw_mmc: add a quirk for the defferent bit of sdio
interrupt
Hi, Addy.
On 10/30/2014 11:21 AM, Addy Ke wrote:
> This patch add a quirk: DW_MCI_QUIRK_SDIO_INT_24BIT.
>
> The bit of sdio interrupt is 16 in designware implementation, but
> is 24 in RK3288. To support RK3288 mmc controller, we need add
> a quirk for it.
>
> Signed-off-by: Addy Ke <addy.ke@...k-chips.com>
> ---
> drivers/mmc/host/dw_mmc.c | 32 +++++++++++++++++++++++++++-----
> drivers/mmc/host/dw_mmc.h | 1 +
> include/linux/mmc/dw_mmc.h | 2 ++
> 3 files changed, 30 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
> index 69f0cc6..db29621 100644
> --- a/drivers/mmc/host/dw_mmc.c
> +++ b/drivers/mmc/host/dw_mmc.c
> @@ -778,6 +778,12 @@ static void dw_mci_setup_bus(struct dw_mci_slot *slot, bool force_clkinit)
> u32 div;
> u32 clk_en_a;
> u32 sdmmc_cmd_bits = SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT;
> + u32 sdio_int_bit;
> +
> + if (host->quirks & DW_MCI_QUIRK_SDIO_INT_24BIT)
I want to change the quirk naming.
If rockchip may use the other bit for sdio_int in future,
then you need to add the DW_MCI_QUIRK_SDIO_INT_xxBIT.?
How about DW_MCI_BROKEN_SDIO_INT_BIT?
And Could you consider to control with more general method than now?
Best Regards,
Jaehoon Chung
> + sdio_int_bit = SDMMC_INT_SDIO_24BIT(slot->id);
> + else
> + sdio_int_bit = SDMMC_INT_SDIO(slot->id);
>
> /* We must continue to set bit 28 in CMD until the change is complete */
> if (host->state == STATE_WAITING_CMD11_DONE)
> @@ -819,7 +825,7 @@ 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) & sdio_int_bit))
> clk_en_a |= SDMMC_CLKEN_LOW_PWR << slot->id;
> mci_writel(host, CLKENA, clk_en_a);
>
> @@ -1167,6 +1173,12 @@ static void dw_mci_enable_sdio_irq(struct mmc_host *mmc, int enb)
> struct dw_mci_slot *slot = mmc_priv(mmc);
> struct dw_mci *host = slot->host;
> u32 int_mask;
> + u32 sdio_int_bit;
> +
> + if (host->quirks & DW_MCI_QUIRK_SDIO_INT_24BIT)
> + sdio_int_bit = SDMMC_INT_SDIO_24BIT(slot->id);
> + else
> + sdio_int_bit = SDMMC_INT_SDIO(slot->id);
>
> /* Enable/disable Slot Specific SDIO interrupt */
> int_mask = mci_readl(host, INTMASK);
> @@ -1180,10 +1192,10 @@ 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 | sdio_int_bit));
> } else {
> mci_writel(host, INTMASK,
> - (int_mask & ~SDMMC_INT_SDIO(slot->id)));
> + (int_mask & ~sdio_int_bit));
> }
> }
>
> @@ -2035,8 +2047,15 @@ 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));
> + u32 sdio_int_bit;
> +
> + if (host->quirks & DW_MCI_QUIRK_SDIO_INT_24BIT)
> + sdio_int_bit = SDMMC_INT_SDIO_24BIT(i);
> + else
> + sdio_int_bit = SDMMC_INT_SDIO(i);
> +
> + if (pending & sdio_int_bit) {
> + mci_writel(host, RINTSTS, sdio_int_bit);
> mmc_signal_sdio_irq(slot->mmc);
> }
> }
> @@ -2452,6 +2471,9 @@ static struct dw_mci_of_quirks {
> }, {
> .quirk = "disable-wp",
> .id = DW_MCI_QUIRK_NO_WRITE_PROTECT,
> + }, {
> + .quirk = "sdio-int-24bit",
> + .id = DW_MCI_QUIRK_SDIO_INT_24BIT,
> },
> };
>
> diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h
> index 01b99e8..6a48015 100644
> --- a/drivers/mmc/host/dw_mmc.h
> +++ b/drivers/mmc/host/dw_mmc.h
> @@ -92,6 +92,7 @@
> #define SDMMC_CTYPE_4BIT BIT(0)
> #define SDMMC_CTYPE_1BIT 0
> /* Interrupt status & mask register defines */
> +#define SDMMC_INT_SDIO_24BIT(n) BIT(24 + (n))
> #define SDMMC_INT_SDIO(n) BIT(16 + (n))
> #define SDMMC_INT_EBE BIT(15)
> #define SDMMC_INT_ACD BIT(14)
> diff --git a/include/linux/mmc/dw_mmc.h b/include/linux/mmc/dw_mmc.h
> index 0013669..6d4669e 100644
> --- a/include/linux/mmc/dw_mmc.h
> +++ b/include/linux/mmc/dw_mmc.h
> @@ -217,6 +217,8 @@ struct dw_mci_dma_ops {
> #define DW_MCI_QUIRK_BROKEN_CARD_DETECTION BIT(3)
> /* No write protect */
> #define DW_MCI_QUIRK_NO_WRITE_PROTECT BIT(4)
> +/* In RK3288, the bit of sdio interrupt is 24 */
> +#define DW_MCI_QUIRK_SDIO_INT_24BIT BIT(5)
>
> /* Slot level quirks */
> /* This slot has no write protect */
>
--
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