2014-09-17 19:25 GMT+04:00 Felipe Balbi <balbi@xxxxxx>: > On Wed, Sep 17, 2014 at 10:46:57AM +0400, Matwey V. Kornilov wrote: >> 2014-09-16 22:39 GMT+04:00 Felipe Balbi <balbi@xxxxxx>: >> > Hi, >> > >> > (man, talk about trimming... leave some context ;-) >> > >> > On Tue, Sep 16, 2014 at 10:06:33PM +0400, Matwey V. Kornilov wrote: >> >> Ok. What is about musb_io.h? What does it mean "TUSB6010 doesn't allow >> >> 8-bit access; 16-bit access is the minimum."? >> > >> > it means that readb() won't work. >> > >> >> I think __raw_readb is kind of return *(u8_t*)(addr), but this is CPU >> >> stuff as far as I understand. >> > >> > tusb6010 is a discrete device connected through GPMC (general purpose >> > memory controller). Basically, this tells you that tusb6010 cannot >> > understand 8-bit accesses through gpmc. >> > >> >> So, I checked the stuff in musb_io.h and it doesn't work properly for >> my BBB. I don't know why. With this tusb6010-custom >> musb_readb/musb_writeb functions I am not able to mount USB flash >> drive (the device is being reset constantly, at the same time the >> webcam works fine). With __raw functions, it is fine. >> >> Do you have an idea how this could be refactored? > > can't think of a solution off the top of my head. Using musb->ops->readb everywhere will add too much overhead probably. -- With best regards, Matwey V. Kornilov http://blog.matwey.name xmpp://0x2207@xxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
