ramips: mmc: Fix init for MT7628AN

There is another thing about crc to do when initialize SD card on
MT7628.
This commit is to fix this init issue.

Signed-off-by: LoveSy <shana@zju.edu.cn>
(backported from 3a8efaef00d6b7317c46fe6b7e923912d8bf3500)

diff --git a/target/linux/ramips/files-4.14/drivers/mmc/host/mtk-mmc/mt6575_sd.h b/target/linux/ramips/files-4.14/drivers/mmc/host/mtk-mmc/mt6575_sd.h
index 33fa59a019ecb2cd6213914090418a6bf30cd8f5..a3c50d0528bc305c60f8b53ef472e47d78595e40 100644 (file)
--- a/target/linux/ramips/files-4.14/drivers/mmc/host/mtk-mmc/mt6575_sd.h
+++ b/target/linux/ramips/files-4.14/drivers/mmc/host/mtk-mmc/mt6575_sd.h
@@ -234,6 +234,7 @@ enum {
 #define MSDC_IOCON_SDR104CKS    (0x1  << 0)     /* RW */
 #define MSDC_IOCON_RSPL         (0x1  << 1)     /* RW */
 #define MSDC_IOCON_DSPL         (0x1  << 2)     /* RW */
+#define MSDC_IOCON_WDSPL        (0x1  << 8)     /* RW */
 #define MSDC_IOCON_DDLSEL       (0x1  << 3)     /* RW */
 #define MSDC_IOCON_DDR50CKD     (0x1  << 4)     /* RW */
 #define MSDC_IOCON_DSPLSEL      (0x1  << 5)     /* RW */

diff --git a/target/linux/ramips/files-4.14/drivers/mmc/host/mtk-mmc/sd.c b/target/linux/ramips/files-4.14/drivers/mmc/host/mtk-mmc/sd.c
index 97ae927d2d2a8dff26cee1dc7f56e36d23a5ee15..e1493290a0475b805b35ddab5f21c15be4ef1f09 100644 (file)
--- a/target/linux/ramips/files-4.14/drivers/mmc/host/mtk-mmc/sd.c
+++ b/target/linux/ramips/files-4.14/drivers/mmc/host/mtk-mmc/sd.c
@@ -1796,6 +1796,9 @@ static void msdc_ops_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
                                      MSDC_SMPL_FALLING);
                        sdr_set_field(MSDC_IOCON, MSDC_IOCON_DSPL,
                                      MSDC_SMPL_FALLING);
+                       /* sdxc: set sample crc by clock falling edge. Added by zhangzf */
+                       if (ralink_soc == MT762X_SOC_MT7628AN)
+                               sdr_set_field(MSDC_IOCON, MSDC_IOCON_WDSPL, MSDC_SMPL_FALLING);
                        //} /* for tuning debug */
                } else { /* default value */
                        sdr_write32(MSDC_IOCON,      0x00000000);
@@ -2205,7 +2208,7 @@ static int msdc_drv_probe(struct platform_device *pdev)
        struct msdc_host *host;
        struct msdc_hw *hw;
        int ret;
-       u32 reg;
+       u32 reg, reg1;
 
        // Set the pins for sdxc to sdxc mode
        //FIXME: this should be done by pinctl and not by the sd driver
@@ -2215,6 +2218,17 @@ static int msdc_drv_probe(struct platform_device *pdev)
                                                  0x60)) & ~(0x3 << 18);
                if (ralink_soc == MT762X_SOC_MT7620A)
                        reg |= 0x1 << 18;
+       }
+       else if (ralink_soc == MT762X_SOC_MT7628AN) {
+               /* Fixed MT7628 SDXC init by zhangzf */
+               reg &= ~((0x3 << 0)|(0x3 << 6)|(0x3 << 10)|(0x1 << 15)|(0x3 << 20)|(0x3 << 24));
+               reg |=  ((0x1 << 0)|(0x1 << 6)|(0x1 << 10)|(0x1 << 15)|(0x1 << 20)|(0x1 << 24));
+#if defined (CONFIG_MTK_MMC_EMMC_8BIT)
+               reg |= 0x3 << 26 | 0x3 << 28 | 0x3 << 30;
+#endif
+               reg1 = sdr_read32((void __iomem *)(RALINK_SYSCTL_BASE + 0x1340));
+               reg1 |= (0x1 << 11); //Normal mode(AP mode), SDXC CLK=PAD_GPIO0=GPIO11, driving = 8mA
+               sdr_write32((void __iomem *)(RALINK_SYSCTL_BASE + 0x1340), reg1);
        } else {
                reg = sdr_read32((void __iomem *)(RALINK_SYSCTL_BASE + 0x3c));
                reg |= 0x1e << 16;