[U-Boot] [PATCH 2/3 V3] esdhc: Detecting 8 bit width before mmc initialization

[Haijun Zhang]

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.zhang at freescale.com>
---
changes for V3:
        - Define quirk in board specific file instead of code in driver
changes for V2:
	- No changes

 drivers/mmc/fsl_esdhc.c    | 5 +++++
 include/configs/T4240QDS.h | 3 +++
 2 files changed, 8 insertions(+)

diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c
index 2ee93cd..72ca109 100644
--- a/drivers/mmc/fsl_esdhc.c
+++ b/drivers/mmc/fsl_esdhc.c
@@ -644,6 +644,11 @@ int fsl_esdhc_initialize(bd_t *bis, struct fsl_esdhc_cfg *cfg)
 	if (caps & ESDHC_HOSTCAPBLT_HSS)
 		mmc->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
 
+#ifdef CONFIG_ESDHC_DETECT_8_BIT_QUIRK
+	if (CONFIG_ESDHC_DETECT_8_BIT_QUIRK)
+		mmc->host_caps &= ~MMC_MODE_8BIT;
+#endif
+
 	mmc->f_min = 400000;
 	mmc->f_max = MIN(gd->arch.sdhc_clk, 52000000);
 
diff --git a/include/configs/T4240QDS.h b/include/configs/T4240QDS.h
index 0e0b346..275a7a8 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)
@@ -471,6 +472,8 @@ unsigned long get_board_ddr_clk(void);
 #define CONFIG_ESDHC_DETECT_QUIRK \
 	(!(readb(QIXIS_BASE + QIXIS_BRDCFG5) & QIXIS_MUX_SDHC) || \
 	IS_SVR_REV(get_svr(), 1, 0))
+#define CONFIG_ESDHC_DETECT_8_BIT_QUIRK \
+	(!(readb(QIXIS_BASE + QIXIS_BRDCFG5) & QIXIS_MUX_SDHC_WIDTH8))
 #endif
 
 #define CONFIG_BOOTDELAY	10	/* -1 disables auto-boot */
-- 
1.8.4.1