On Fri, Jul 19, 2013 at 2:51 PM, Sebastian Andrzej Siewior <[email protected]> wrote: > On 07/19/2013 11:16 AM, Rajaram R wrote: >> That was work in progress. You may wish to look at this patch >> http://permalink.gmane.org/gmane.linux.usb.general/79858 >> >> If a device sends 513 bytes to a musb device. 512 bytes will be >> received in DMA mode and 1 byte in FIFO mode. >> >> FIFO will always handle data < 512. > > Okay. Let me rephrase this: Lets say there is a read request for 4096 > bytes and your maxpacket is 512 and total of 4096 bytes will be sent by > the device. How many interrupts / read requests will there be? > 8 like every maxpacket size or is it possible to stuff more data and > transfer 4096 in one go?
Not 100% sure, but as i remember it will be 8 times in the present driver (atleast host mode). But yes we can do 4096 at a time. > >>>> Cheers >>> > Sebastian -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
