[U-Boot] [PATCH] fsl_esdhc: Add Auto command 12 interrupt bit detecting

[Stefano Babic <sbabic@denx.de>]

Hi,

On 21/10/2013 10:23, Zhang Haijun wrote:
> Hi, all
> 
> Who can give some comments?

I put Antonius in CC, he's the MMC custodian.


The driver is for both PPC and i.MX. On which platform do you test these
changes ?

Best regards,
Stefano Babic

> 
> 
> ? 2013/10/12 17:50, Haijun Zhang ??:
>> When Auto-CMD12 is used, the corresponding interrupt and error bit
>> should be enabled and set to reflect auto cmd 12 error.
>> Also add other command error detecting, like command index error,
>> CRC error etc. Without this command error bit set system will hang
>> due to the while loop.
>>
>> Signed-off-by: Haijun Zhang <Haijun.Zhang@freescale.com>
>> ---
>>  drivers/mmc/fsl_esdhc.c | 10 +++++-----
>>  include/fsl_esdhc.h     |  3 ++-
>>  2 files changed, 7 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c
>> index dc1d002..5aa592b 100644
>> --- a/drivers/mmc/fsl_esdhc.c
>> +++ b/drivers/mmc/fsl_esdhc.c
>> @@ -342,13 +342,13 @@ esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
>>  #endif
>>  
>>  	/* Wait for the command to complete */
>> -	while (!(esdhc_read32(&regs->irqstat) & (IRQSTAT_CC | IRQSTAT_CTOE)))
>> +	while (!(esdhc_read32(&regs->irqstat) & (IRQSTAT_CC | CMD_ERR)))
>>  		;
>>  
>>  	irqstat = esdhc_read32(&regs->irqstat);
>>  
>>  	/* Reset CMD and DATA portions on error */
>> -	if (irqstat & (CMD_ERR | IRQSTAT_CTOE)) {
>> +	if (irqstat & CMD_ERR) {
>>  		esdhc_write32(&regs->sysctl, esdhc_read32(&regs->sysctl) |
>>  			      SYSCTL_RSTC);
>>  		while (esdhc_read32(&regs->sysctl) & SYSCTL_RSTC)
>> @@ -363,12 +363,12 @@ esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
>>  		}
>>  	}
>>  
>> -	if (irqstat & CMD_ERR)
>> -		return COMM_ERR;
>> -
>>  	if (irqstat & IRQSTAT_CTOE)
>>  		return TIMEOUT;
>>  
>> +	if (irqstat & CMD_ERR)
>> +		return COMM_ERR;
>> +
>>  	/* Workaround for ESDHC errata ENGcm03648 */
>>  	if (!data && (cmd->resp_type & MMC_RSP_BUSY)) {
>>  		int timeout = 2500;
>> diff --git a/include/fsl_esdhc.h b/include/fsl_esdhc.h
>> index 67d6057..37dbe27 100644
>> --- a/include/fsl_esdhc.h
>> +++ b/include/fsl_esdhc.h
>> @@ -62,7 +62,8 @@
>>  #define IRQSTAT_TC		(0x00000002)
>>  #define IRQSTAT_CC		(0x00000001)
>>  
>> -#define CMD_ERR		(IRQSTAT_CIE | IRQSTAT_CEBE | IRQSTAT_CCE)
>> +#define CMD_ERR		(IRQSTAT_CIE | IRQSTAT_CEBE | IRQSTAT_CCE | \
>> +				IRQSTAT_CTOE | IRQSTAT_AC12E)
>>  #define DATA_ERR	(IRQSTAT_DEBE | IRQSTAT_DCE | IRQSTAT_DTOE | \
>>  				IRQSTAT_DMAE)
>>  #define DATA_COMPLETE	(IRQSTAT_TC | IRQSTAT_DINT)
> 


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