Hi, David Gwynne from OpenBSD sent me some patches to make USB EHCI host controllers handle suspending and resuming better. These have mostly been committed to OpenBSD already. Has anyone been having trouble with EHCI devices not recovering after a suspend/resume? If so, could you try the patch below and see if it helps? I've only checked that this compiles so far, and I could have easily messed up applying David's patches. Ian Index: ehci.c =================================================================== RCS file: /dump/FreeBSD-CVS/src/sys/dev/usb/ehci.c,v retrieving revision 1.14 diff -u -r1.14 ehci.c --- ehci.c 2 Aug 2004 15:37:34 -0000 1.14 +++ ehci.c 22 Oct 2004 00:54:28 -0000 _at__at_ -990,8 +990,8 _at__at_ ehci_power(int why, void *v) { ehci_softc_t *sc = v; - //u_int32_t ctl; - int s; + u_int32_t cmd, hcr; + int s, i; #ifdef EHCI_DEBUG DPRINTF(("ehci_power: sc=%p, why=%d\n", sc, why)); _at__at_ -1005,46 +1005,101 _at__at_ case PWR_STANDBY: #endif sc->sc_bus.use_polling++; -#if 0 -OOO - ctl = OREAD4(sc, EHCI_CONTROL) & ~EHCI_HCFS_MASK; - if (sc->sc_control == 0) { - /* - * Preserve register values, in case that APM BIOS - * does not recover them. - */ - sc->sc_control = ctl; - sc->sc_intre = OREAD4(sc, EHCI_INTERRUPT_ENABLE); + + for (i = 1; i <= sc->sc_noport; i++) { + cmd = EOREAD4(sc, EHCI_PORTSC(i)); + if ((cmd & EHCI_PS_PO) == 0 && + (cmd & EHCI_PS_PE) == EHCI_PS_PE) + EOWRITE4(sc, EHCI_PORTSC(i), + cmd | EHCI_PS_SUSP); + } + + sc->sc_cmd = EOREAD4(sc, EHCI_USBCMD); + + cmd = sc->sc_cmd & ~(EHCI_CMD_ASE | EHCI_CMD_PSE); + EOWRITE4(sc, EHCI_USBCMD, cmd); + + for (i = 0; i < 100; i++) { + hcr = EOREAD4(sc, EHCI_USBSTS) & + (EHCI_STS_ASS | EHCI_STS_PSS); + if (hcr == 0) + break; + + usb_delay_ms(&sc->sc_bus, 1); } - ctl |= EHCI_HCFS_SUSPEND; - OWRITE4(sc, EHCI_CONTROL, ctl); -#endif - usb_delay_ms(&sc->sc_bus, USB_RESUME_WAIT); + if (hcr != 0) { + printf("%s: reset timeout\n", + USBDEVNAME(sc->sc_bus.bdev)); + } + + cmd &= ~EHCI_CMD_RS; + EOWRITE4(sc, EHCI_USBCMD, cmd); + + for (i = 0; i < 100; i++) { + hcr = EOREAD4(sc, EHCI_USBSTS) & EHCI_STS_HCH; + if (hcr == EHCI_STS_HCH) + break; + + usb_delay_ms(&sc->sc_bus, 1); + } + if (hcr != EHCI_STS_HCH) { + printf("%s: config timeout\n", + USBDEVNAME(sc->sc_bus.bdev)); + } + sc->sc_bus.use_polling--; break; + case PWR_RESUME: sc->sc_bus.use_polling++; -#if 0 -OOO - /* Some broken BIOSes do not recover these values */ - OWRITE4(sc, EHCI_HCCA, DMAADDR(&sc->sc_hccadma, 0)); - OWRITE4(sc, EHCI_CONTROL_HEAD_ED, sc->sc_ctrl_head->physaddr); - OWRITE4(sc, EHCI_BULK_HEAD_ED, sc->sc_bulk_head->physaddr); - if (sc->sc_intre) - OWRITE4(sc, EHCI_INTERRUPT_ENABLE, - sc->sc_intre & (EHCI_ALL_INTRS | EHCI_MIE)); - if (sc->sc_control) - ctl = sc->sc_control; - else - ctl = OREAD4(sc, EHCI_CONTROL); - ctl |= EHCI_HCFS_RESUME; - OWRITE4(sc, EHCI_CONTROL, ctl); - usb_delay_ms(&sc->sc_bus, USB_RESUME_DELAY); - ctl = (ctl & ~EHCI_HCFS_MASK) | EHCI_HCFS_OPERATIONAL; - OWRITE4(sc, EHCI_CONTROL, ctl); - usb_delay_ms(&sc->sc_bus, USB_RESUME_RECOVERY); - sc->sc_control = sc->sc_intre = 0; -#endif + + /* restore things in case the bios sucks */ + EOWRITE4(sc, EHCI_CTRLDSSEGMENT, 0); + EOWRITE4(sc, EHCI_PERIODICLISTBASE, DMAADDR(&sc->sc_fldma, 0)); + EOWRITE4(sc, EHCI_ASYNCLISTADDR, + sc->sc_async_head->physaddr | EHCI_LINK_QH); + EOWRITE4(sc, EHCI_USBINTR, sc->sc_eintrs); + + hcr = 0; + for (i = 1; i <= sc->sc_noport; i++) { + cmd = EOREAD4(sc, EHCI_PORTSC(i)); + if ((cmd & EHCI_PS_PO) == 0 && + (cmd & EHCI_PS_SUSP) == EHCI_PS_SUSP) { + EOWRITE4(sc, EHCI_PORTSC(i), + cmd | EHCI_PS_FPR); + hcr = 1; + } + } + + if (hcr) { + usb_delay_ms(&sc->sc_bus, USB_RESUME_WAIT); + + for (i = 1; i <= sc->sc_noport; i++) { + cmd = EOREAD4(sc, EHCI_PORTSC(i)); + if ((cmd & EHCI_PS_PO) == 0 && + (cmd & EHCI_PS_SUSP) == EHCI_PS_SUSP) + EOWRITE4(sc, EHCI_PORTSC(i), + cmd & ~EHCI_PS_FPR); + } + } + + EOWRITE4(sc, EHCI_USBCMD, sc->sc_cmd); + + for (i = 0; i < 100; i++) { + hcr = EOREAD4(sc, EHCI_USBSTS) & EHCI_STS_HCH; + if (hcr != EHCI_STS_HCH) + break; + + usb_delay_ms(&sc->sc_bus, 1); + } + + if (hcr == EHCI_STS_HCH) { + printf("%s: config timeout\n", + USBDEVNAME(sc->sc_bus.bdev)); + } + + usb_delay_ms(&sc->sc_bus, USB_RESUME_WAIT); + sc->sc_bus.use_polling--; break; #if defined(__NetBSD__) || defined(__OpenBSD__) Index: ehcivar.h =================================================================== RCS file: /dump/FreeBSD-CVS/src/sys/dev/usb/ehcivar.h,v retrieving revision 1.4 diff -u -r1.4 ehcivar.h --- ehcivar.h 2 Aug 2004 15:37:34 -0000 1.4 +++ ehcivar.h 22 Oct 2004 00:54:29 -0000 _at__at_ -106,6 +106,7 _at__at_ char sc_vendor[16]; /* vendor string for root hub */ int sc_id_vendor; /* vendor ID for root hub */ + u_int32_t sc_cmd; /* shadow of cmd reg during suspend */ #if defined(__NetBSD__) || defined(__OpenBSD__) void *sc_powerhook; /* cookie from power hook */ void *sc_shutdownhook; /* cookie from shutdown hook */Received on Fri Oct 22 2004 - 00:03:51 UTC
This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:38:19 UTC