Hi Josh, On 21 December 2015 at 07:11, Josh Sanford <joshs6...@gmail.com> wrote: > Thanks Simon. I'm having difficulty finding anything by Stefan Bruns around > that time frame, or much of anything recent pertaining to DWC. (I only > checked the u-boot-denx.git and u-boot-rockchip.git branches.) Am I looking > in the wrong place?
This is just patches at present - see here: http://patchwork.ozlabs.org/project/uboot/list/?submitter=67055&state=* Regards, Simon > > On Sat, Dec 19, 2015 at 3:30 PM, Simon Glass <s...@chromium.org> wrote: >> >> +Marek, Stephen >> >> Hi Josh, >> >> On 18 December 2015 at 06:26, Josh Sanford <joshs6...@gmail.com> wrote: >> > All, >> > >> > I am trying to use USB within U-Boot on a Firefly RK3288 (Rockchip) >> > board, >> > and I am able to enumerate high-speed devices, but not full-speed or >> > low-speed devices. I know that the devices are functional, because they >> > work on the same physical hardware when I boot into Linux. Note that >> > I'm >> > using "U-Boot 2014.10-RK3288-02". >> > >> > As an aside, the built-in "USB 2.0 Hub [MTT]" hub never generates a >> > USB_PORT_STAT_C_CONNECTION for me, even though USB_PORT_STAT_CONNECTION >> > goes >> > high immediately after powering on, so I forcibly assert >> > USB_PORT_STAT_C_CONNECTION to allow the rest of the tree to enumerate. >> > >> > High-speed devices can be nested as deeply as I wish and still show up >> > properly, but I can't get low-speed devices (i.e. a keyboard) to work in >> > any >> > hub port, including any of the ports directly on the board. All >> > attempts to >> > read from my low-speed devices return all zeros. When I dig a little >> > deeper, I find myself in int dwc_wait_for_complete(struct usb_device >> > *dev, >> > uint32_t channel_num, uint32_t *hcStat, uint32_t *errCnt) {}. >> > >> > On the second iteration through the goto loop, hcintn.b.chhltd and >> > hcintn.b.xacterr are both asserted, but hcintn.b.ack, hcintn.b.nak, and >> > hcintn.b.nyet are not, and errCnt is only 1, so the code sets *hcStat = >> > HCSTAT_REINIT and returns. >> > >> > I do notice that dwc_hcd.c seems not to have any code to support split >> > transactions (or perhaps I simply haven't seen it yet). If true, I >> > wonder >> > whether this code is actually expected to support full-speed and >> > low-speed >> > devices. Do you have any thoughts on the matter? I wish I were more of >> > a >> > USB expert, but I'm regrettably quite a novice. >> >> I believe the split transaction issue is currently being resolved for >> DWC. See for example Stefan Bruns' series from 13th December. It might >> be worth trying that out. >> >> Regards, >> Simon > > _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
