W dniu 31 marca 2010 11:08 użytkownik Daniel Mack <daniel@xxxxxxxx> napisał:
> On Wed, Mar 31, 2010 at 11:07:06AM +0200, Michał Mirosław wrote:
>> 2010/3/30 Daniel Mack <daniel@xxxxxxxx>:
>> [...]
>> > @@ -1022,6 +1025,27 @@ static int if_sdio_probe(struct sdio_func *func,
>> > if (ret)
>> > goto disable;
>> >
>> > + /* For 1-bit transfers, we need to enable the interrupt flags in
>> > + * the CCCR register. Temporarily set the function number to 0
>> > + * for that. */
>> > + if ((host->caps & MMC_CAP_SDIO_IRQ) &&
>> > + (host->ios.bus_width == MMC_BUS_WIDTH_1)) {
>> > + unsigned int num = func->num;
>> > + u8 reg;
>> > +
>> > + func->num = 0;
>> > + reg = sdio_readb(func, SDIO_CCCR_IF, &ret);
>> > + if (ret)
>> > + goto release_int;
>> > +
>> > + reg |= SDIO_BUS_ECSI | SDIO_BUS_SCSI;
>> > + sdio_writeb(func, reg, SDIO_CCCR_IF, &ret);
>> > + if (ret)
>> > + goto release_int;
>> > +
>> > + func->num = num;
>> > + }
>> > +
>> > card->ioport = sdio_readb(func, IF_SDIO_IOPORT, &ret);
>> > if (ret)
>> > goto release_int;
>>
>> You should probably just use mmc_io_rw_direct() in this case instead
>> of abusing func->num.
>
> Hmm, that function isn't exported, and I didn't want to change this. You
> say you'd prefer that? I can cook up something that does it, no problem.
BTW, I can't see any exported functions to access fn#0 directly from
drivers. Maybe it's time to introduce them now - at least CCCR has
some vendor-defined parts that drivers may want to access and there is
a lot of place in CIS area that can be (ab)used by devices.
Best Regards,
Michał Mirosław
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