* Matthijs van Duin <matthijsvanduin@xxxxxxxxx> [150314 14:04]: > On 13 March 2015 at 20:30, Tony Lindgren <tony@xxxxxxxxxxx> wrote: > > Hmm OK have to check that. It could also be that dm816x documentation > > is copy-paste from da850 or am3517 and the PHY got changed in the > > hardware as the registers don't match the documentation. Only the > > dm816x errata has right documentation for the USB PHY. > > Hmm? While I see plenty of usb errata (mostly DMA bugs), I don't see > anything about registers being different. Sorry it seems to be the partially updated TRM instead, it's the sprs614e.pdf instead. That has the USBPHY_CTRL registers right. No mention of Synopsys in sprs614e.pdf though so who knows. It seems something got swapped compared to the TRM as the USB_CTRL registers totally changed. I'll just add a comments you mentioned earlier about it probably being Synopsys phy. > I do see something curious: advisory 70, the only PHY-related erratum > I see, is also present in the DM814x errata and even in AM335x r1.0. > This strongly suggests the PHYs must at least be closely related... Hmm interesting. But dm814x has again different USB_CTRL registers, seems to be wired up like am335x. Also there's no USBPHY_CTRL registers on dm814x or am335x. Chances are that dm814x is wired up the same way as am335x. > The dm816x TRM makes three separate mentions of the synopsys usb phy > though, while I found no other TRMs that mention it, so if it's a > copy-paste error (which certainly would not be exceptional) I don't > know where from. Yes I checked am3517 trm, and that too mentions Synopsys once, but has different registers. And also checked the l-138/da850 TRM, and that does not have USB_CTRL and USBPHY_CTRL registers either.. Looks like the copy paste errors come from tms320dm6446.pdf that has the USB_CTRL and USBPHY_CTRL registers, but then no mention of Synopsys. > I suppose it's still possible TI acquired a sufficiently permissive > license for the synopsys phy to fork it and call it a "TI PHY" as they > do in the AM335x docs. (No mention of its origin is made in the DM814x > docs.) > > BTW, da850? Is that yet another instance of Primus? (i.e. > omap-L1xx/c674x/am1xxx with odd final digit, also da830/da828) Yes it's the arm926 based series, l-138 is da850 I believe. Regards, Tony -- 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
