* [U-Boot] [PATCH v4 0/2] sunxi: fix eMMC stability issues on A64
@ 2018-06-02 1:28 Vasily Khoruzhick
2018-06-02 1:28 ` [U-Boot] [PATCH v4 1/2] sunxi-mmc: use new mode " Vasily Khoruzhick
2018-06-02 1:28 ` [U-Boot] [PATCH v4 2/2] mmc: sunxi: run calibration " Vasily Khoruzhick
0 siblings, 2 replies; 4+ messages in thread
From: Vasily Khoruzhick @ 2018-06-02 1:28 UTC (permalink / raw)
To: u-boot
eMMC seems to require new clocking mode and calibration on A64,
otherwise it is pretty unstable on some boards (e.g. Pinebook)
with some eMMCs.
v2: - improve comment about calibration for eMMC on A64
- simplify ifdef-s around configuring delays
v3: - fix fallout due to ifdef simplification in v2
v4: - really fix ifdefs this time
Vasily Khoruzhick (2):
sunxi-mmc: use new mode on A64
mmc: sunxi: run calibration on A64
arch/arm/include/asm/arch-sunxi/mmc.h | 6 +++++-
arch/arm/mach-sunxi/Kconfig | 1 +
drivers/mmc/sunxi_mmc.c | 13 +++++++++++++
3 files changed, 19 insertions(+), 1 deletion(-)
--
2.17.1
^ permalink raw reply [flat|nested] 4+ messages in thread
* [U-Boot] [PATCH v4 1/2] sunxi-mmc: use new mode on A64
2018-06-02 1:28 [U-Boot] [PATCH v4 0/2] sunxi: fix eMMC stability issues on A64 Vasily Khoruzhick
@ 2018-06-02 1:28 ` Vasily Khoruzhick
2018-06-04 8:39 ` Maxime Ripard
2018-06-02 1:28 ` [U-Boot] [PATCH v4 2/2] mmc: sunxi: run calibration " Vasily Khoruzhick
1 sibling, 1 reply; 4+ messages in thread
From: Vasily Khoruzhick @ 2018-06-02 1:28 UTC (permalink / raw)
To: u-boot
That is necessary for using automatic calibration on A64 eMMC.
Signed-off-by: Vasily khoruzhick <anarsoul@gmail.com>
---
arch/arm/mach-sunxi/Kconfig | 1 +
drivers/mmc/sunxi_mmc.c | 2 ++
2 files changed, 3 insertions(+)
diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig
index 66fb094ac5..8a35033d1f 100644
--- a/arch/arm/mach-sunxi/Kconfig
+++ b/arch/arm/mach-sunxi/Kconfig
@@ -257,6 +257,7 @@ config MACH_SUN50I
select SUNXI_GEN_SUN6I
select SUN6I_PRCM
select SUNXI_HIGH_SRAM
+ select MMC_SUNXI_HAS_NEW_MODE
select SUPPORT_SPL
select SUNXI_DRAM_DW
select SUNXI_DRAM_DW_32BIT
diff --git a/drivers/mmc/sunxi_mmc.c b/drivers/mmc/sunxi_mmc.c
index fe6d82c7b4..34739c98b9 100644
--- a/drivers/mmc/sunxi_mmc.c
+++ b/drivers/mmc/sunxi_mmc.c
@@ -166,7 +166,9 @@ static int mmc_set_mod_clk(struct sunxi_mmc_priv *priv, unsigned int hz)
if (new_mode) {
#ifdef CONFIG_MMC_SUNXI_HAS_NEW_MODE
+#ifndef CONFIG_MACH_SUN50I
val = CCM_MMC_CTRL_MODE_SEL_NEW;
+#endif
setbits_le32(&priv->reg->ntsr, SUNXI_MMC_NTSR_MODE_SEL_NEW);
#endif
} else {
--
2.17.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [U-Boot] [PATCH v4 2/2] mmc: sunxi: run calibration on A64
2018-06-02 1:28 [U-Boot] [PATCH v4 0/2] sunxi: fix eMMC stability issues on A64 Vasily Khoruzhick
2018-06-02 1:28 ` [U-Boot] [PATCH v4 1/2] sunxi-mmc: use new mode " Vasily Khoruzhick
@ 2018-06-02 1:28 ` Vasily Khoruzhick
1 sibling, 0 replies; 4+ messages in thread
From: Vasily Khoruzhick @ 2018-06-02 1:28 UTC (permalink / raw)
To: u-boot
Along with using new mode it fixes eMMC instability on Pinebook
Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
---
arch/arm/include/asm/arch-sunxi/mmc.h | 6 +++++-
drivers/mmc/sunxi_mmc.c | 11 +++++++++++
2 files changed, 16 insertions(+), 1 deletion(-)
diff --git a/arch/arm/include/asm/arch-sunxi/mmc.h b/arch/arm/include/asm/arch-sunxi/mmc.h
index 1574b8e8fe..d6664a01f2 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];
#ifdef CONFIG_SUNXI_GEN_SUN6I
- 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 */
diff --git a/drivers/mmc/sunxi_mmc.c b/drivers/mmc/sunxi_mmc.c
index 34739c98b9..9e47e06239 100644
--- a/drivers/mmc/sunxi_mmc.c
+++ b/drivers/mmc/sunxi_mmc.c
@@ -225,6 +225,17 @@ static int mmc_config_clock(struct sunxi_mmc_priv *priv, struct mmc *mmc)
rval &= ~SUNXI_MMC_CLK_DIVIDER_MASK;
writel(rval, &priv->reg->clkcr);
+#ifdef CONFIG_MACH_SUN50I
+ /* A64 needs to run calibration on eMMC controller and we
+ * have to set delay of zero before starting calibration.
+ * Allwinner BSP driver sets a delay only in the case of
+ * using HS400 which is not supported by mainline U-Boot or
+ * Linux at the moment
+ */
+ if (priv->mmc_no == 2)
+ writel(SUNXI_MMC_CAL_DL_SW_EN, &priv->reg->samp_dl);
+#endif
+
/* Re-enable Clock */
rval |= SUNXI_MMC_CLK_ENABLE;
writel(rval, &priv->reg->clkcr);
--
2.17.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [U-Boot] [PATCH v4 1/2] sunxi-mmc: use new mode on A64
2018-06-02 1:28 ` [U-Boot] [PATCH v4 1/2] sunxi-mmc: use new mode " Vasily Khoruzhick
@ 2018-06-04 8:39 ` Maxime Ripard
0 siblings, 0 replies; 4+ messages in thread
From: Maxime Ripard @ 2018-06-04 8:39 UTC (permalink / raw)
To: u-boot
Hi,
On Fri, Jun 01, 2018 at 06:28:37PM -0700, Vasily Khoruzhick wrote:
> That is necessary for using automatic calibration on A64 eMMC.
>
> Signed-off-by: Vasily khoruzhick <anarsoul@gmail.com>
> ---
> arch/arm/mach-sunxi/Kconfig | 1 +
> drivers/mmc/sunxi_mmc.c | 2 ++
> 2 files changed, 3 insertions(+)
>
> diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig
> index 66fb094ac5..8a35033d1f 100644
> --- a/arch/arm/mach-sunxi/Kconfig
> +++ b/arch/arm/mach-sunxi/Kconfig
> @@ -257,6 +257,7 @@ config MACH_SUN50I
> select SUNXI_GEN_SUN6I
> select SUN6I_PRCM
> select SUNXI_HIGH_SRAM
> + select MMC_SUNXI_HAS_NEW_MODE
> select SUPPORT_SPL
> select SUNXI_DRAM_DW
> select SUNXI_DRAM_DW_32BIT
> diff --git a/drivers/mmc/sunxi_mmc.c b/drivers/mmc/sunxi_mmc.c
> index fe6d82c7b4..34739c98b9 100644
> --- a/drivers/mmc/sunxi_mmc.c
> +++ b/drivers/mmc/sunxi_mmc.c
> @@ -166,7 +166,9 @@ static int mmc_set_mod_clk(struct sunxi_mmc_priv *priv, unsigned int hz)
>
> if (new_mode) {
> #ifdef CONFIG_MMC_SUNXI_HAS_NEW_MODE
> +#ifndef CONFIG_MACH_SUN50I
Didn't we agree on introducing another Kconfig option here?
Maxime
--
Maxime Ripard, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com
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end of thread, other threads:[~2018-06-04 8:39 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-06-02 1:28 [U-Boot] [PATCH v4 0/2] sunxi: fix eMMC stability issues on A64 Vasily Khoruzhick
2018-06-02 1:28 ` [U-Boot] [PATCH v4 1/2] sunxi-mmc: use new mode " Vasily Khoruzhick
2018-06-04 8:39 ` Maxime Ripard
2018-06-02 1:28 ` [U-Boot] [PATCH v4 2/2] mmc: sunxi: run calibration " Vasily Khoruzhick
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