Hi Roger On Thu, Jun 27, 2013 at 04:59:38PM +0300, Roger Quadros wrote: > Hi Michael, > > On 06/27/2013 02:51 PM, Michael Trimarchi wrote: > > Hi > > > > I'm working on omap4460 with two ulpi connected to (SMSC3320 -> HUB SMSC2514) or (TUSB1210 -> HUB SMSC2514). > > The problem only happen when both port are used and after few suspend resume are triggered. > > If I use just one port there is no issue on suspend resume. I already covered all TI > > errata that I know and I'm working on TI kernel. > > > > The problem is here > > > > [ 77.701934] ehci-omap ehci-omap.0: irq status a004 Async Recl PCD > > > > Both ports change status from 001005 to 001009 (you have a log just after). > > So from host point of view both hub connected are not working in HS mode. > > After that the omap ehci has gone because the bus can not work in FS and LS and I can not recover from here. > > Status of transceivers are dumped and they are ok after resume. > > > > Do you have any suggestion? > > I'm not very sure but both ports suddenly changing state like that look like > a hardware issue. Also, it is strange that you can reproduce it only when two > ports are simultaneously in use. Unfortunately, I can't match your setup with 2 ULPI Yes I know that TI doesn't have any setup like that. > ports. > > I have a OMAP5 uEVM that uses 2 ports but it won't be identical to your setup as > they are on HSIC and not ULPI. > > Did you try errata i693? Yes I have it. It's not clear if I need to wait after ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); polling the suspendM of the SMSC or the suspend status of the PORT or I can switch just after this instruction. Because TI kernel use an msleep of 4 mseconds and then switch. It could be a timing issue on how errata is implemented when I have two ports? How this internal count works? First time is 18, and then? > > Also, are you suspending and resuming only the USB or the entire system? > Whole system. Right the only susbsytem that doens't go to suspend is the FSUSB but this depends on the bootloader. Michael > cheers, > -roger -- | Michael Nazzareno Trimarchi Amarula Solutions BV | | COO - Founder Cruquiuskade 47 | | +31(0)851119172 Amsterdam 1018 AM NL | -- 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
