Since commit 87a18a6a5652 ("mmc: mmc: Use ->card_busy() to detect busy
cards in __mmc_switch()") the ESDHC driver is broken:
mmc0: Card stuck in programming state! __mmc_switch
mmc0: error -110 whilst initialising MMC card
Since this commit __mmc_switch() uses ->card_busy(), which is
sdhci_card_busy() for the esdhc driver. sdhci_card_busy() uses the
PRESENT_STATE register, specifically the DAT0 signal level bit. But the
ESDHC uses a non-conformant PRESENT_STATE register, thus a read fixup is
required to make the driver work again.
Signed-off-by: Michael Walle <[email protected]>
Fixes: 87a18a6a5652 ("mmc: mmc: Use ->card_busy() to detect busy cards in __mmc_switch()")
---
v3:
- explain the bits in the comments
- use bits[19:0] from the original value, all other will be taken from the
fixup value.
v2:
- use lower bits of the original value (that was actually a typo)
- add fixes tag
- fix typo
drivers/mmc/host/sdhci-of-esdhc.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c
index fb71c86..74cf3b1 100644
--- a/drivers/mmc/host/sdhci-of-esdhc.c
+++ b/drivers/mmc/host/sdhci-of-esdhc.c
@@ -66,6 +66,19 @@ static u32 esdhc_readl_fixup(struct sdhci_host *host,
return ret;
}
}
+ /*
+ * The DAT[3:0] line signal levels and the CMD line signal level are
+ * not compatible with standard SDHC register. The line signal levels
+ * DAT[7:0] are at bits 31:24 and the line signal level is at bit 23.
+ * All other bits are the same as in the standard SDHC register.
+ */
+ if (spec_reg == SDHCI_PRESENT_STATE) {
+ ret = value & 0x000fffff;
+ ret |= (value >> 4) & SDHCI_DATA_LVL_MASK;
+ ret |= (value << 1) & 0x01000000;
+ return ret;
+ }
+
ret = value;
return ret;
}
--
2.1.4
On 14/11/16 17:12, Michael Walle wrote:
> Since commit 87a18a6a5652 ("mmc: mmc: Use ->card_busy() to detect busy
> cards in __mmc_switch()") the ESDHC driver is broken:
> mmc0: Card stuck in programming state! __mmc_switch
> mmc0: error -110 whilst initialising MMC card
>
> Since this commit __mmc_switch() uses ->card_busy(), which is
> sdhci_card_busy() for the esdhc driver. sdhci_card_busy() uses the
> PRESENT_STATE register, specifically the DAT0 signal level bit. But the
> ESDHC uses a non-conformant PRESENT_STATE register, thus a read fixup is
> required to make the driver work again.
>
> Signed-off-by: Michael Walle <[email protected]>
> Fixes: 87a18a6a5652 ("mmc: mmc: Use ->card_busy() to detect busy cards in __mmc_switch()")
> ---
> v3:
> - explain the bits in the comments
> - use bits[19:0] from the original value, all other will be taken from the
> fixup value.
>
> v2:
> - use lower bits of the original value (that was actually a typo)
> - add fixes tag
> - fix typo
>
> drivers/mmc/host/sdhci-of-esdhc.c | 13 +++++++++++++
> 1 file changed, 13 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c
> index fb71c86..74cf3b1 100644
> --- a/drivers/mmc/host/sdhci-of-esdhc.c
> +++ b/drivers/mmc/host/sdhci-of-esdhc.c
> @@ -66,6 +66,19 @@ static u32 esdhc_readl_fixup(struct sdhci_host *host,
> return ret;
> }
> }
> + /*
> + * The DAT[3:0] line signal levels and the CMD line signal level are
> + * not compatible with standard SDHC register. The line signal levels
> + * DAT[7:0] are at bits 31:24 and the line signal level is at bit 23.
> + * All other bits are the same as in the standard SDHC register.
> + */
> + if (spec_reg == SDHCI_PRESENT_STATE) {
> + ret = value & 0x000fffff;
> + ret |= (value >> 4) & SDHCI_DATA_LVL_MASK;
> + ret |= (value << 1) & 0x01000000;
Please define the command line level bit in sdhci.h and use that here.
e.g.
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 766df17fb7eb..2570455b219a 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -73,6 +73,7 @@
#define SDHCI_DATA_LVL_MASK 0x00F00000
#define SDHCI_DATA_LVL_SHIFT 20
#define SDHCI_DATA_0_LVL_MASK 0x00100000
+#define SDHCI_CMD_LVL 0x01000000
#define SDHCI_HOST_CONTROL 0x28
#define SDHCI_CTRL_LED 0x01
> + return ret;
> + }
> +
> ret = value;
> return ret;
> }
>
On Monday 14 November 2016 16:12:27, Michael Walle wrote:
> Since commit 87a18a6a5652 ("mmc: mmc: Use ->card_busy() to detect busy
> cards in __mmc_switch()") the ESDHC driver is broken:
> mmc0: Card stuck in programming state! __mmc_switch
> mmc0: error -110 whilst initialising MMC card
>
> Since this commit __mmc_switch() uses ->card_busy(), which is
> sdhci_card_busy() for the esdhc driver. sdhci_card_busy() uses the
> PRESENT_STATE register, specifically the DAT0 signal level bit. But the
> ESDHC uses a non-conformant PRESENT_STATE register, thus a read fixup is
> required to make the driver work again.
>
> Signed-off-by: Michael Walle <[email protected]>
> Fixes: 87a18a6a5652 ("mmc: mmc: Use ->card_busy() to detect busy cards in
> __mmc_switch()") ---
> v3:
> - explain the bits in the comments
> - use bits[19:0] from the original value, all other will be taken from the
> fixup value.
>
> v2:
> - use lower bits of the original value (that was actually a typo)
> - add fixes tag
> - fix typo
>
> drivers/mmc/host/sdhci-of-esdhc.c | 13 +++++++++++++
> 1 file changed, 13 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci-of-esdhc.c
> b/drivers/mmc/host/sdhci-of-esdhc.c index fb71c86..74cf3b1 100644
> --- a/drivers/mmc/host/sdhci-of-esdhc.c
> +++ b/drivers/mmc/host/sdhci-of-esdhc.c
> @@ -66,6 +66,19 @@ static u32 esdhc_readl_fixup(struct sdhci_host *host,
> return ret;
> }
> }
> + /*
> + * The DAT[3:0] line signal levels and the CMD line signal level are
> + * not compatible with standard SDHC register. The line signal levels
> + * DAT[7:0] are at bits 31:24 and the line signal level is at bit 23.
^
I guess there is a "command" missing, no?
Best regards,
Alexander
> -----Original Message-----
> From: Michael Walle [mailto:[email protected]]
> Sent: Monday, November 14, 2016 11:12 PM
> To: [email protected]
> Cc: [email protected]; Ulf Hansson; Adrian Hunter; yangbo lu;
> Michael Walle
> Subject: [PATCH v3] mmc: sdhci-of-esdhc: fixup PRESENT_STATE read
>
> Since commit 87a18a6a5652 ("mmc: mmc: Use ->card_busy() to detect busy
> cards in __mmc_switch()") the ESDHC driver is broken:
> mmc0: Card stuck in programming state! __mmc_switch
> mmc0: error -110 whilst initialising MMC card
>
> Since this commit __mmc_switch() uses ->card_busy(), which is
> sdhci_card_busy() for the esdhc driver. sdhci_card_busy() uses the
> PRESENT_STATE register, specifically the DAT0 signal level bit. But the
> ESDHC uses a non-conformant PRESENT_STATE register, thus a read fixup is
> required to make the driver work again.
>
> Signed-off-by: Michael Walle <[email protected]>
> Fixes: 87a18a6a5652 ("mmc: mmc: Use ->card_busy() to detect busy cards in
> __mmc_switch()")
> ---
> v3:
> - explain the bits in the comments
> - use bits[19:0] from the original value, all other will be taken from
> the
> fixup value.
>
> v2:
> - use lower bits of the original value (that was actually a typo)
> - add fixes tag
> - fix typo
>
> drivers/mmc/host/sdhci-of-esdhc.c | 13 +++++++++++++
> 1 file changed, 13 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-
> of-esdhc.c
> index fb71c86..74cf3b1 100644
> --- a/drivers/mmc/host/sdhci-of-esdhc.c
> +++ b/drivers/mmc/host/sdhci-of-esdhc.c
> @@ -66,6 +66,19 @@ static u32 esdhc_readl_fixup(struct sdhci_host *host,
> return ret;
> }
> }
> + /*
> + * The DAT[3:0] line signal levels and the CMD line signal level
> are
> + * not compatible with standard SDHC register. The line signal
> levels
> + * DAT[7:0] are at bits 31:24 and the line signal level is at bit
> 23.
> + * All other bits are the same as in the standard SDHC register.
> + */
> + if (spec_reg == SDHCI_PRESENT_STATE) {
> + ret = value & 0x000fffff;
> + ret |= (value >> 4) & SDHCI_DATA_LVL_MASK;
> + ret |= (value << 1) & 0x01000000;
> + return ret;
> + }
> +
[Lu Yangbo-B47093] This is the proper fix.
Acked-by: Yangbo Lu <[email protected]>
> ret = value;
> return ret;
> }
> --
> 2.1.4