On 11/27/2017 06:27 PM, Chris Brandt wrote:
> Hello Marek,
>
> On Friday, November 17, 2017, Marek Vasut wrote:
>>> +#ifdef RZA_USB
>>> + dcpctr = r8a66597_read(r8a66597, DCPCTR);
>>
>> use wait_for_bit() .
>>
>>> + if ((dcpctr & PID) == PID_BUF) {
>>> + timeout2 = 10000;
>>> + while (!(dcpctr & BSTS)) {
>>> + dcpctr = r8a66597_read(r8a66597, DCPCTR);
>>> + if (timeout2-- < 0) {
>>> + printf("DCPCTR clear timeout!\n");
>>> + break;
>>> + }
>>> + }
>>> + }
>>> +#endif
>
>
> wait_for_bit() wants you to pass a direct address of a 32-bit register.
> The register I am waiting for is a 16-bit register and the hardware
> manual doesn't say 32-bit is allowed.
> When I do a 32-bit read on that address, I actually get a different
> value.
>
> For example:
>
> => md.w E8010060 1
> e8010060: 0040
> => md.l E8010060 1
> e8010060: 00400000
>
>
> So, I can't use wait_for_bit()
Can we somehow extend wait_for_bit() ?
> Chris
>
--
Best regards,
Marek Vasut
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