[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.zhang at 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
>
>
>