mmc: sunxi: add support for automatic delay calibration

A64 and H6 support automatic delay calibration and Linux driver uses it
instead of hardcoded delays. Add support for it to u-boot driver.

Fixes eMMC instability on Pinebook

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Tested-by: Maxime Ripard <maxime.ripard@bootlin.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Cc: Vagrant Cascadian <vagrant@debian.org>
Reviewed-by: Jagan Teki <jagan@openedev.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/arch/arm/include/asm/arch-sunxi/mmc.h b/arch/arm/include/asm/arch-sunxi/mmc.h
index d98c53faaa..f2deafddd2 100644
--- a/arch/arm/include/asm/arch-sunxi/mmc.h
+++ b/arch/arm/include/asm/arch-sunxi/mmc.h
@@ -46,7 +46,9 @@ struct sunxi_mmc {
         u32 cbda;               /* 0x94 */
         u32 res2[26];
 #if defined(CONFIG_SUNXI_GEN_SUN6I) || defined(CONFIG_MACH_SUN50I_H6)
-        u32 res3[64];
+        u32 res3[17];
+        u32 samp_dl;
+        u32 res4[46];
 #endif
         u32 fifo;               /* 0x100 / 0x200 FIFO access address */
 };
@@ -130,5 +132,7 @@ struct sunxi_mmc {
 #define SUNXI_MMC_COMMON_CLK_GATE               (1 << 16)
 #define SUNXI_MMC_COMMON_RESET                  (1 << 18)
 
+#define SUNXI_MMC_CAL_DL_SW_EN          (0x1 << 7)
+
 struct mmc *sunxi_mmc_init(int sdc_no);
 #endif /* _SUNXI_MMC_H */