[U-Boot] [USB EHCI PATCH 1/2] USB ehci remove infinite loop and use handshake function

[michael]

Stefan Roese wrote:
> On Wednesday 17 December 2008, Michael Trimarchi wrote:
>   
>> USB ehci code cleanup. Use handshake instead of infinite while loop
>> to check the STD_ASS status
>>
>> Signed-off-by: Michael Trimarchi <trimarchimichael at yahoo.it>
>>
>> ---
>>  drivers/usb/usb_ehci_core.c |   53
>> ++++++++++++++++++++++--------------------- 1 files changed, 27
>> insertions(+), 26 deletions(-)
>>
>> diff --git a/drivers/usb/usb_ehci_core.c b/drivers/usb/usb_ehci_core.c
>> index 07e9a6b..21fd7d0 100644
>> --- a/drivers/usb/usb_ehci_core.c
>> +++ b/drivers/usb/usb_ehci_core.c
>> @@ -28,7 +28,7 @@
>>  #include "usb_ehci.h"
>>
>>  int rootdev;
>> -struct ehci_hccr *hccr;		/* R/O registers, not need for volatile */
>> +struct ehci_hccr *hccr;	/* R/O registers, not need for volatile */
>>  volatile struct ehci_hcor *hcor;
>>
>>  static uint16_t portreset;
>> @@ -106,20 +106,19 @@ static struct descriptor {
>>  #define ehci_is_TDI()	(0)
>>  #endif
>>
>> -static int handshake(uint32_t *ptr, uint32_t mask, uint32_t done, int
>> msec) +static int handshake(uint32_t *ptr, uint32_t mask, uint32_t done,
>> int usec) {
>>  	uint32_t result;
>>  	do {
>>  		result = ehci_readl(ptr);
>> -		debug("handshake read reg(%x)=%x\n", (uint32_t)ptr, result);
>>  		if (result == ~(uint32_t)0)
>>  			return -1;
>>  		result &= mask;
>>  		if (result == done)
>>  			return 0;
>> -		wait_ms(1);
>> -		msec--;
>> -	} while (msec > 0);
>> +		udelay(1);
>> +		usec--;
>> +	} while (usec > 0);
>>  	return -1;
>>  }
>>
>> @@ -138,21 +137,21 @@ static int ehci_reset(void)
>>  	cmd = ehci_readl(&hcor->or_usbcmd);
>>  	cmd |= CMD_RESET;
>>  	ehci_writel(&hcor->or_usbcmd, cmd);
>> -	ret = handshake((uint32_t *)&hcor->or_usbcmd, CMD_RESET, 0, 250);
>> +	ret = handshake((uint32_t *)&hcor->or_usbcmd, CMD_RESET, 0, 250 * 1000);
>>  	if (ret < 0) {
>>  		printf("EHCI fail to reset\n");
>>  		goto out;
>>  	}
>>
>> -#if defined(CONFIG_EHCI_IS_TDI)
>> -	reg_ptr = (uint32_t *)((u8 *)hcor + USBMODE);
>> -	tmp = ehci_readl(reg_ptr);
>> -	tmp |= USBMODE_CM_HC;
>> -#if defined(CONFIG_EHCI_MMIO_BIG_ENDIAN)
>> -	tmp |= USBMODE_BE;
>> -#endif
>> -	ehci_writel(reg_ptr, tmp);
>> -#endif
>> +	if (ehci_is_TDI()) {
>> +		reg_ptr = (uint32_t *)((u8 *)hcor + USBMODE);
>> +		tmp = ehci_readl(reg_ptr);
>> +		tmp |= USBMODE_CM_HC;
>> +		#if defined(CONFIG_EHCI_MMIO_BIG_ENDIAN)
>>     
>
> I prefer that the "#if" stays in column 0. 
>   
Yes, thanks.
>   
>> +			tmp |= USBMODE_BE;
>>     
>
> Indentation problem.
>
> Best regards,
> Stefan
>
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>
>   
Regards Michael