On Fri, 2004-09-10 at 16:56, Lothar Wassmann wrote: > No. The SL811 has the same interface as the ISP1160 with an > address/data register pair through which all internal registers are > accessed. > Very good news indeed! Our cases are very similar.
> That's the simplest problem. With the macros for register access you > can do whatever you like in order to read/write the chips registers. > I'll attach my current ISP1362 register definition and access macros, > so you can probably use the same scheme to get access to your chip. > Ok, i got it. I'll check it during the weekend and we'll be in touch from Monday. > No. The device could be used as a slave DMA device, but: > 1) in our hardware the data register is located on a non-DMAable > address (PXA DMA addresses must be aligned to double word > boundary) > 2) the SL811 requires CPU intervention for every data packet that is > sent or received anyway and could possibly transfer at most 240 > byte in a single packet. Thus it's not worth the effort of using > DMA to move data to/from the chip. > For the ISP116x/1362 it's a different story. So do you intend to enable DMA transfers for 1362? From what I know about 116x, it's worth the "trouble". Maybe you, or anybody else, can point me to a functioning driver example of a device that acts as Slave DMA? Because by looking at the OHCI code I see the way of doing it only for a Master DMA device, and I don't have a clue for the slave case... Anyway, you have the best news I've heard since months :-) Thanks, Dimitris ------------------------------------------------------- This SF.Net email is sponsored by: YOU BE THE JUDGE. Be one of 170 Project Admins to receive an Apple iPod Mini FREE for your judgement on who ports your project to Linux PPC the best. Sponsored by IBM. Deadline: Sept. 13. Go here: http://sf.net/ppc_contest.php _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
