mmc: tmio: add TMIO_MMC_SDIO_STATUS_QUIRK

Renesas R-Car SDHI should set reserved bits
on CTL_SDIO_STATUS register when writing.
This patch adds new TMIO_MMC_SDIO_STATUS_QUIRK flags
for this purpose

[Kuninori Morimoto: tidyuped for upstreaming
                    enabled this flags for all SH-Mobile/R-Car]

Tested-by: Nguyen Xuan Nui <nx-nui@jinso.co.jp>
Tested-by: Hiep Cao Minh <cm-hiep@jinso.co.jp>
Signed-off-by: Shinobu Uehara <shinobu.uehara.xc@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index 4727586..ebcfc65 100644 (file)
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -230,6 +230,11 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
         */
        mmc_data->flags |= TMIO_MMC_HAVE_CMD12_CTRL;
 
+       /*
+        * All SDHI need SDIO_INFO1 reserved bit
+        */
+       mmc_data->flags |= TMIO_MMC_SDIO_STATUS_QUIRK;
+
        if (of_id && of_id->data) {
                const struct sh_mobile_sdhi_of_data *of_data = of_id->data;
                mmc_data->flags |= of_data->tmio_flags;

diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index c280482..c5ffa92 100644 (file)
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -665,6 +665,7 @@ irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid)
        struct mmc_host *mmc = host->mmc;
        struct tmio_mmc_data *pdata = host->pdata;
        unsigned int ireg, status;
+       unsigned int sdio_status;
 
        if (!(pdata->flags & TMIO_MMC_SDIO_IRQ))
                return IRQ_HANDLED;
@@ -672,7 +673,11 @@ irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid)
        status = sd_ctrl_read16(host, CTL_SDIO_STATUS);
        ireg = status & TMIO_SDIO_MASK_ALL & ~host->sdcard_irq_mask;
 
-       sd_ctrl_write16(host, CTL_SDIO_STATUS, status & ~TMIO_SDIO_MASK_ALL);
+       sdio_status = status & ~TMIO_SDIO_MASK_ALL;
+       if (pdata->flags & TMIO_MMC_SDIO_STATUS_QUIRK)
+               sdio_status |= 6;
+
+       sd_ctrl_write16(host, CTL_SDIO_STATUS, sdio_status);
 
        if (mmc->caps & MMC_CAP_SDIO_IRQ && ireg & TMIO_SDIO_STAT_IOIRQ)
                mmc_signal_sdio_irq(mmc);

diff --git a/include/linux/mfd/tmio.h b/include/linux/mfd/tmio.h
index 7432d95..a7493ae 100644 (file)
--- a/include/linux/mfd/tmio.h
+++ b/include/linux/mfd/tmio.h
@@ -89,6 +89,11 @@
  */
 #define TMIO_MMC_HAVE_CMD12_CTRL       (1 << 7)
 
+/*
+ * Some controllers needs to set 1 on SDIO status reserved bits
+ */
+#define TMIO_MMC_SDIO_STATUS_QUIRK     (1 << 8)
+
 int tmio_core_mmc_enable(void __iomem *cnf, int shift, unsigned long base);
 int tmio_core_mmc_resume(void __iomem *cnf, int shift, unsigned long base);
 void tmio_core_mmc_pwr(void __iomem *cnf, int shift, int state);