Re: [U-Boot] [PATCH 2/3 V2] esdhc: Detecting 8 bit width before mmc initialization

[Zhang Haijun]

Understand.

Thanks.

Best regards,
Haijun

于 2014/1/9 18:43, Pantelis Antoniou 写道:

Hi Haijun,

On Dec 11, 2013, at 7:35 AM, Haijun Zhang wrote:

The upper 4 data signals of esdhc are shared with spi flash.
So detect if the upper 4 pins are assigned to esdhc before
enable sdhc 8 bit width.

Signed-off-by: Haijun Zhang <haijun.zh...@freescale.com>
---
changs for V2:
        - No changes

drivers/mmc/fsl_esdhc.c    | 5 +++++
include/configs/T4240QDS.h | 1 +
2 files changed, 6 insertions(+)

diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c
index b3b5f37..a5fee3c 100644
--- a/drivers/mmc/fsl_esdhc.c
+++ b/drivers/mmc/fsl_esdhc.c
@@ -646,6 +646,11 @@ int fsl_esdhc_initialize(bd_t *bis, struct fsl_esdhc_cfg 
*cfg)
                        mmc->host_caps &= ~MMC_MODE_4BIT;
        }

+       /* Detect if the upper 4 pins are used for ESDHC */
+#if defined(CONFIG_T4240QDS)
+       if (!(readb(QIXIS_BASE + QIXIS_BRDCFG5) & QIXIS_MUX_SDHC_WIDTH8))
+               mmc->host_caps &= ~MMC_MODE_8BIT;
+#endif

Same comment applies as for the card detect quirk,

#define CONFIG_ESDHC_DETECT_8_BIT_QUIRK etc.

        if (caps & ESDHC_HOSTCAPBLT_HSS)
                mmc->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;

diff --git a/include/configs/T4240QDS.h b/include/configs/T4240QDS.h
index 955e6b9..4799d38 100644
--- a/include/configs/T4240QDS.h
+++ b/include/configs/T4240QDS.h
@@ -167,6 +167,7 @@ unsigned long get_board_ddr_clk(void);
#define QIXIS_RCFG_CTL_WATCHDOG_ENBLE   0x08
#define QIXIS_BRDCFG5                   0x55
#define QIXIS_MUX_SDHC                  2
+#define QIXIS_MUX_SDHC_WIDTH8          1
#define QIXIS_BASE_PHYS         (0xf00000000ull | QIXIS_BASE)

#define CONFIG_SYS_CSPR3_EXT    (0xf)
--
1.8.4.1

Regards

-- Pantelis

_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
http://lists.denx.de/mailman/listinfo/u-boot