diff options
Diffstat (limited to 'drivers/usb/host/ohci-hub.c')
| -rw-r--r-- | drivers/usb/host/ohci-hub.c | 803 |
1 files changed, 803 insertions, 0 deletions
diff --git a/drivers/usb/host/ohci-hub.c b/drivers/usb/host/ohci-hub.c new file mode 100644 index 0000000000..90cee192e9 --- /dev/null +++ b/drivers/usb/host/ohci-hub.c @@ -0,0 +1,803 @@ +// SPDX-License-Identifier: GPL-1.0+ +/* + * OHCI HCD (Host Controller Driver) for USB. + * + * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> + * (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net> + * + * This file is licenced under GPL + */ + +/*-------------------------------------------------------------------------*/ + +/* + * OHCI Root Hub ... the nonsharable stuff + */ + +#define dbg_port(hc,label,num,value) \ + ohci_dbg (hc, \ + "%s roothub.portstatus [%d] " \ + "= 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \ + label, num, value, \ + (value & RH_PS_PRSC) ? " PRSC" : "", \ + (value & RH_PS_OCIC) ? " OCIC" : "", \ + (value & RH_PS_PSSC) ? " PSSC" : "", \ + (value & RH_PS_PESC) ? " PESC" : "", \ + (value & RH_PS_CSC) ? " CSC" : "", \ + \ + (value & RH_PS_LSDA) ? " LSDA" : "", \ + (value & RH_PS_PPS) ? " PPS" : "", \ + (value & RH_PS_PRS) ? " PRS" : "", \ + (value & RH_PS_POCI) ? " POCI" : "", \ + (value & RH_PS_PSS) ? " PSS" : "", \ + \ + (value & RH_PS_PES) ? " PES" : "", \ + (value & RH_PS_CCS) ? " CCS" : "" \ + ); + +/*-------------------------------------------------------------------------*/ + +#define OHCI_SCHED_ENABLES \ + (OHCI_CTRL_CLE|OHCI_CTRL_BLE|OHCI_CTRL_PLE|OHCI_CTRL_IE) + +static void update_done_list(struct ohci_hcd *); +static void ohci_work(struct ohci_hcd *); + +#ifdef CONFIG_PM +static int ohci_rh_suspend (struct ohci_hcd *ohci, int autostop) +__releases(ohci->lock) +__acquires(ohci->lock) +{ + int status = 0; + + ohci->hc_control = ohci_readl (ohci, &ohci->regs->control); + switch (ohci->hc_control & OHCI_CTRL_HCFS) { + case OHCI_USB_RESUME: + ohci_dbg (ohci, "resume/suspend?\n"); + ohci->hc_control &= ~OHCI_CTRL_HCFS; + ohci->hc_control |= OHCI_USB_RESET; + ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); + (void) ohci_readl (ohci, &ohci->regs->control); + fallthrough; + case OHCI_USB_RESET: + status = -EBUSY; + ohci_dbg (ohci, "needs reinit!\n"); + goto done; + case OHCI_USB_SUSPEND: + if (!ohci->autostop) { + ohci_dbg (ohci, "already suspended\n"); + goto done; + } + } + ohci_dbg (ohci, "%s root hub\n", + autostop ? "auto-stop" : "suspend"); + + /* First stop any processing */ + if (!autostop && (ohci->hc_control & OHCI_SCHED_ENABLES)) { + ohci->hc_control &= ~OHCI_SCHED_ENABLES; + ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); + ohci->hc_control = ohci_readl (ohci, &ohci->regs->control); + ohci_writel (ohci, OHCI_INTR_SF, &ohci->regs->intrstatus); + + /* sched disables take effect on the next frame, + * then the last WDH could take 6+ msec + */ + ohci_dbg (ohci, "stopping schedules ...\n"); + ohci->autostop = 0; + spin_unlock_irq (&ohci->lock); + msleep (8); + spin_lock_irq (&ohci->lock); + } + update_done_list(ohci); + ohci_work(ohci); + + /* All ED unlinks should be finished, no need for SOF interrupts */ + ohci_writel(ohci, OHCI_INTR_SF, &ohci->regs->intrdisable); + + /* + * Some controllers don't handle "global" suspend properly if + * there are unsuspended ports. For these controllers, put all + * the enabled ports into suspend before suspending the root hub. + */ + if (ohci->flags & OHCI_QUIRK_GLOBAL_SUSPEND) { + __hc32 __iomem *portstat = ohci->regs->roothub.portstatus; + int i; + unsigned temp; + + for (i = 0; i < ohci->num_ports; (++i, ++portstat)) { + temp = ohci_readl(ohci, portstat); + if ((temp & (RH_PS_PES | RH_PS_PSS)) == + RH_PS_PES) + ohci_writel(ohci, RH_PS_PSS, portstat); + } + } + + /* maybe resume can wake root hub */ + if (ohci_to_hcd(ohci)->self.root_hub->do_remote_wakeup || autostop) { + ohci->hc_control |= OHCI_CTRL_RWE; + } else { + ohci_writel(ohci, OHCI_INTR_RHSC | OHCI_INTR_RD, + &ohci->regs->intrdisable); + ohci->hc_control &= ~OHCI_CTRL_RWE; + } + + /* Suspend hub ... this is the "global (to this bus) suspend" mode, + * which doesn't imply ports will first be individually suspended. + */ + ohci->hc_control &= ~OHCI_CTRL_HCFS; + ohci->hc_control |= OHCI_USB_SUSPEND; + ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); + (void) ohci_readl (ohci, &ohci->regs->control); + + /* no resumes until devices finish suspending */ + if (!autostop) { + ohci->next_statechange = jiffies + msecs_to_jiffies (5); + ohci->autostop = 0; + ohci->rh_state = OHCI_RH_SUSPENDED; + } + +done: + return status; +} + +static inline struct ed *find_head (struct ed *ed) +{ + /* for bulk and control lists */ + while (ed->ed_prev) + ed = ed->ed_prev; + return ed; +} + +/* caller has locked the root hub */ +static int ohci_rh_resume (struct ohci_hcd *ohci) +__releases(ohci->lock) +__acquires(ohci->lock) +{ + struct usb_hcd *hcd = ohci_to_hcd (ohci); + u32 temp, enables; + int status = -EINPROGRESS; + int autostopped = ohci->autostop; + + ohci->autostop = 0; + ohci->hc_control = ohci_readl (ohci, &ohci->regs->control); + + if (ohci->hc_control & (OHCI_CTRL_IR | OHCI_SCHED_ENABLES)) { + /* this can happen after resuming a swsusp snapshot */ + if (ohci->rh_state != OHCI_RH_RUNNING) { + ohci_dbg (ohci, "BIOS/SMM active, control %03x\n", + ohci->hc_control); + status = -EBUSY; + /* this happens when pmcore resumes HC then root */ + } else { + ohci_dbg (ohci, "duplicate resume\n"); + status = 0; + } + } else switch (ohci->hc_control & OHCI_CTRL_HCFS) { + case OHCI_USB_SUSPEND: + ohci->hc_control &= ~(OHCI_CTRL_HCFS|OHCI_SCHED_ENABLES); + ohci->hc_control |= OHCI_USB_RESUME; + ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); + (void) ohci_readl (ohci, &ohci->regs->control); + ohci_dbg (ohci, "%s root hub\n", + autostopped ? "auto-start" : "resume"); + break; + case OHCI_USB_RESUME: + /* HCFS changes sometime after INTR_RD */ + ohci_dbg(ohci, "%swakeup root hub\n", + autostopped ? "auto-" : ""); + break; + case OHCI_USB_OPER: + /* this can happen after resuming a swsusp snapshot */ + ohci_dbg (ohci, "snapshot resume? reinit\n"); + status = -EBUSY; + break; + default: /* RESET, we lost power */ + ohci_dbg (ohci, "lost power\n"); + status = -EBUSY; + } + if (status == -EBUSY) { + if (!autostopped) { + spin_unlock_irq (&ohci->lock); + status = ohci_restart (ohci); + + usb_root_hub_lost_power(hcd->self.root_hub); + + spin_lock_irq (&ohci->lock); + } + return status; + } + if (status != -EINPROGRESS) + return status; + if (autostopped) + goto skip_resume; + spin_unlock_irq (&ohci->lock); + + /* Some controllers (lucent erratum) need extra-long delays */ + msleep (20 /* usb 11.5.1.10 */ + 12 /* 32 msec counter */ + 1); + + temp = ohci_readl (ohci, &ohci->regs->control); + temp &= OHCI_CTRL_HCFS; + if (temp != OHCI_USB_RESUME) { + ohci_err (ohci, "controller won't resume\n"); + spin_lock_irq(&ohci->lock); + return -EBUSY; + } + + /* disable old schedule state, reinit from scratch */ + ohci_writel (ohci, 0, &ohci->regs->ed_controlhead); + ohci_writel (ohci, 0, &ohci->regs->ed_controlcurrent); + ohci_writel (ohci, 0, &ohci->regs->ed_bulkhead); + ohci_writel (ohci, 0, &ohci->regs->ed_bulkcurrent); + ohci_writel (ohci, 0, &ohci->regs->ed_periodcurrent); + ohci_writel (ohci, (u32) ohci->hcca_dma, &ohci->regs->hcca); + + /* Sometimes PCI D3 suspend trashes frame timings ... */ + periodic_reinit (ohci); + + /* + * The following code is executed with ohci->lock held and + * irqs disabled if and only if autostopped is true. This + * will cause sparse to warn about a "context imbalance". + */ +skip_resume: + /* interrupts might have been disabled */ + ohci_writel (ohci, OHCI_INTR_INIT, &ohci->regs->intrenable); + if (ohci->ed_rm_list) + ohci_writel (ohci, OHCI_INTR_SF, &ohci->regs->intrenable); + + /* Then re-enable operations */ + ohci_writel (ohci, OHCI_USB_OPER, &ohci->regs->control); + (void) ohci_readl (ohci, &ohci->regs->control); + if (!autostopped) + msleep (3); + + temp = ohci->hc_control; + temp &= OHCI_CTRL_RWC; + temp |= OHCI_CONTROL_INIT | OHCI_USB_OPER; + ohci->hc_control = temp; + ohci_writel (ohci, temp, &ohci->regs->control); + (void) ohci_readl (ohci, &ohci->regs->control); + + /* TRSMRCY */ + if (!autostopped) { + msleep (10); + spin_lock_irq (&ohci->lock); + } + /* now ohci->lock is always held and irqs are always disabled */ + + /* keep it alive for more than ~5x suspend + resume costs */ + ohci->next_statechange = jiffies + STATECHANGE_DELAY; + + /* maybe turn schedules back on */ + enables = 0; + temp = 0; + if (!ohci->ed_rm_list) { + if (ohci->ed_controltail) { + ohci_writel (ohci, + find_head (ohci->ed_controltail)->dma, + &ohci->regs->ed_controlhead); + enables |= OHCI_CTRL_CLE; + temp |= OHCI_CLF; + } + if (ohci->ed_bulktail) { + ohci_writel (ohci, find_head (ohci->ed_bulktail)->dma, + &ohci->regs->ed_bulkhead); + enables |= OHCI_CTRL_BLE; + temp |= OHCI_BLF; + } + } + if (hcd->self.bandwidth_isoc_reqs || hcd->self.bandwidth_int_reqs) + enables |= OHCI_CTRL_PLE|OHCI_CTRL_IE; + if (enables) { + ohci_dbg (ohci, "restarting schedules ... %08x\n", enables); + ohci->hc_control |= enables; + ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); + if (temp) + ohci_writel (ohci, temp, &ohci->regs->cmdstatus); + (void) ohci_readl (ohci, &ohci->regs->control); + } + + ohci->rh_state = OHCI_RH_RUNNING; + return 0; +} + +static int ohci_bus_suspend (struct usb_hcd *hcd) +{ + struct ohci_hcd *ohci = hcd_to_ohci (hcd); + int rc; + + spin_lock_irq (&ohci->lock); + + if (unlikely(!HCD_HW_ACCESSIBLE(hcd))) + rc = -ESHUTDOWN; + else + rc = ohci_rh_suspend (ohci, 0); + spin_unlock_irq (&ohci->lock); + + if (rc == 0) { + del_timer_sync(&ohci->io_watchdog); + ohci->prev_frame_no = IO_WATCHDOG_OFF; + } + return rc; +} + +static int ohci_bus_resume (struct usb_hcd *hcd) +{ + struct ohci_hcd *ohci = hcd_to_ohci (hcd); + int rc; + + if (time_before (jiffies, ohci->next_statechange)) + msleep(5); + + spin_lock_irq (&ohci->lock); + + if (unlikely(!HCD_HW_ACCESSIBLE(hcd))) + rc = -ESHUTDOWN; + else + rc = ohci_rh_resume (ohci); + spin_unlock_irq (&ohci->lock); + + /* poll until we know a device is connected or we autostop */ + if (rc == 0) + usb_hcd_poll_rh_status(hcd); + return rc; +} + +/* Carry out polling-, autostop-, and autoresume-related state changes */ +static int ohci_root_hub_state_changes(struct ohci_hcd *ohci, int changed, + int any_connected, int rhsc_status) +{ + int poll_rh = 1; + int rhsc_enable; + + /* Some broken controllers never turn off RHSC in the interrupt + * status register. For their sake we won't re-enable RHSC + * interrupts if the interrupt bit is already active. + */ + rhsc_enable = ohci_readl(ohci, &ohci->regs->intrenable) & + OHCI_INTR_RHSC; + + switch (ohci->hc_control & OHCI_CTRL_HCFS) { + case OHCI_USB_OPER: + /* If no status changes are pending, enable RHSC interrupts. */ + if (!rhsc_enable && !rhsc_status && !changed) { + rhsc_enable = OHCI_INTR_RHSC; + ohci_writel(ohci, rhsc_enable, &ohci->regs->intrenable); + } + + /* Keep on polling until we know a device is connected + * and RHSC is enabled, or until we autostop. + */ + if (!ohci->autostop) { + if (any_connected || + !device_may_wakeup(&ohci_to_hcd(ohci) + ->self.root_hub->dev)) { + if (rhsc_enable) + poll_rh = 0; + } else { + ohci->autostop = 1; + ohci->next_statechange = jiffies + HZ; + } + + /* if no devices have been attached for one second, autostop */ + } else { + if (changed || any_connected) { + ohci->autostop = 0; + ohci->next_statechange = jiffies + + STATECHANGE_DELAY; + } else if (time_after_eq(jiffies, + ohci->next_statechange) + && !ohci->ed_rm_list + && !(ohci->hc_control & + OHCI_SCHED_ENABLES)) { + ohci_rh_suspend(ohci, 1); + if (rhsc_enable) + poll_rh = 0; + } + } + break; + + case OHCI_USB_SUSPEND: + case OHCI_USB_RESUME: + /* if there is a port change, autostart or ask to be resumed */ + if (changed) { + if (ohci->autostop) + ohci_rh_resume(ohci); + else + usb_hcd_resume_root_hub(ohci_to_hcd(ohci)); + + /* If remote wakeup is disabled, stop polling */ + } else if (!ohci->autostop && + !ohci_to_hcd(ohci)->self.root_hub-> + do_remote_wakeup) { + poll_rh = 0; + + } else { + /* If no status changes are pending, + * enable RHSC interrupts + */ + if (!rhsc_enable && !rhsc_status) { + rhsc_enable = OHCI_INTR_RHSC; + ohci_writel(ohci, rhsc_enable, + &ohci->regs->intrenable); + } + /* Keep polling until RHSC is enabled */ + if (rhsc_enable) + poll_rh = 0; + } + break; + } + return poll_rh; +} + +#else /* CONFIG_PM */ + +static inline int ohci_rh_resume(struct ohci_hcd *ohci) +{ + return 0; +} + +/* Carry out polling-related state changes. + * autostop isn't used when CONFIG_PM is turned off. + */ +static int ohci_root_hub_state_changes(struct ohci_hcd *ohci, int changed, + int any_connected, int rhsc_status) +{ + /* If RHSC is enabled, don't poll */ + if (ohci_readl(ohci, &ohci->regs->intrenable) & OHCI_INTR_RHSC) + return 0; + + /* If status changes are pending, continue polling. + * Conversely, if no status changes are pending but the RHSC + * status bit was set, then RHSC may be broken so continue polling. + */ + if (changed || rhsc_status) + return 1; + + /* It's safe to re-enable RHSC interrupts */ + ohci_writel(ohci, OHCI_INTR_RHSC, &ohci->regs->intrenable); + return 0; +} + +#endif /* CONFIG_PM */ + +/*-------------------------------------------------------------------------*/ + +/* build "status change" packet (one or two bytes) from HC registers */ + +int ohci_hub_status_data(struct usb_hcd *hcd, char *buf) +{ + struct ohci_hcd *ohci = hcd_to_ohci (hcd); + int i, changed = 0, length = 1; + int any_connected = 0; + int rhsc_status; + unsigned long flags; + + spin_lock_irqsave (&ohci->lock, flags); + if (!HCD_HW_ACCESSIBLE(hcd)) + goto done; + + /* undocumented erratum seen on at least rev D */ + if ((ohci->flags & OHCI_QUIRK_AMD756) + && (roothub_a (ohci) & RH_A_NDP) > MAX_ROOT_PORTS) { + ohci_warn (ohci, "bogus NDP, rereads as NDP=%d\n", + ohci_readl (ohci, &ohci->regs->roothub.a) & RH_A_NDP); + /* retry later; "should not happen" */ + goto done; + } + + /* init status */ + if (roothub_status (ohci) & (RH_HS_LPSC | RH_HS_OCIC)) + buf [0] = changed = 1; + else + buf [0] = 0; + if (ohci->num_ports > 7) { + buf [1] = 0; + length++; + } + + /* Clear the RHSC status flag before reading the port statuses */ + ohci_writel(ohci, OHCI_INTR_RHSC, &ohci->regs->intrstatus); + rhsc_status = ohci_readl(ohci, &ohci->regs->intrstatus) & + OHCI_INTR_RHSC; + + /* look at each port */ + for (i = 0; i < ohci->num_ports; i++) { + u32 status = roothub_portstatus (ohci, i); + + /* can't autostop if ports are connected */ + any_connected |= (status & RH_PS_CCS); + + if (status & (RH_PS_CSC | RH_PS_PESC | RH_PS_PSSC + | RH_PS_OCIC | RH_PS_PRSC)) { + changed = 1; + if (i < 7) + buf [0] |= 1 << (i + 1); + else + buf [1] |= 1 << (i - 7); + } + } + + if (ohci_root_hub_state_changes(ohci, changed, + any_connected, rhsc_status)) + set_bit(HCD_FLAG_POLL_RH, &hcd->flags); + else + clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); + + +done: + spin_unlock_irqrestore (&ohci->lock, flags); + + return changed ? length : 0; +} +EXPORT_SYMBOL_GPL(ohci_hub_status_data); + +/*-------------------------------------------------------------------------*/ + +static void +ohci_hub_descriptor ( + struct ohci_hcd *ohci, + struct usb_hub_descriptor *desc +) { + u32 rh = roothub_a (ohci); + u16 temp; + + desc->bDescriptorType = USB_DT_HUB; + desc->bPwrOn2PwrGood = (rh & RH_A_POTPGT) >> 24; + desc->bHubContrCurrent = 0; + + desc->bNbrPorts = ohci->num_ports; + temp = 1 + (ohci->num_ports / 8); + desc->bDescLength = 7 + 2 * temp; + + temp = HUB_CHAR_COMMON_LPSM | HUB_CHAR_COMMON_OCPM; + if (rh & RH_A_NPS) /* no power switching? */ + temp |= HUB_CHAR_NO_LPSM; + if (rh & RH_A_PSM) /* per-port power switching? */ + temp |= HUB_CHAR_INDV_PORT_LPSM; + if (rh & RH_A_NOCP) /* no overcurrent reporting? */ + temp |= HUB_CHAR_NO_OCPM; + else if (rh & RH_A_OCPM) /* per-port overcurrent reporting? */ + temp |= HUB_CHAR_INDV_PORT_OCPM; + desc->wHubCharacteristics = cpu_to_le16(temp); + + /* ports removable, and usb 1.0 legacy PortPwrCtrlMask */ + rh = roothub_b (ohci); + memset(desc->u.hs.DeviceRemovable, 0xff, + sizeof(desc->u.hs.DeviceRemovable)); + desc->u.hs.DeviceRemovable[0] = rh & RH_B_DR; + if (ohci->num_ports > 7) { + desc->u.hs.DeviceRemovable[1] = (rh & RH_B_DR) >> 8; + desc->u.hs.DeviceRemovable[2] = 0xff; + } else + desc->u.hs.DeviceRemovable[1] = 0xff; +} + +/*-------------------------------------------------------------------------*/ + +#ifdef CONFIG_USB_OTG + +static int ohci_start_port_reset (struct usb_hcd *hcd, unsigned port) +{ + struct ohci_hcd *ohci = hcd_to_ohci (hcd); + u32 status; + + if (!port) + return -EINVAL; + port--; + + /* start port reset before HNP protocol times out */ + status = ohci_readl(ohci, &ohci->regs->roothub.portstatus [port]); + if (!(status & RH_PS_CCS)) + return -ENODEV; + + /* hub_wq will finish the reset later */ + ohci_writel(ohci, RH_PS_PRS, &ohci->regs->roothub.portstatus [port]); + return 0; +} + +#else + +#define ohci_start_port_reset NULL + +#endif + +/*-------------------------------------------------------------------------*/ + + +/* See usb 7.1.7.5: root hubs must issue at least 50 msec reset signaling, + * not necessarily continuous ... to guard against resume signaling. + */ +#define PORT_RESET_MSEC 50 + +/* this timer value might be vendor-specific ... */ +#define PORT_RESET_HW_MSEC 10 + +/* wrap-aware logic morphed from <linux/jiffies.h> */ +#define tick_before(t1,t2) ((s16)(((s16)(t1))-((s16)(t2))) < 0) + +/* called from some task, normally hub_wq */ +static inline int root_port_reset (struct ohci_hcd *ohci, unsigned port) +{ + __hc32 __iomem *portstat = &ohci->regs->roothub.portstatus [port]; + u32 temp = 0; + u16 now = ohci_readl(ohci, &ohci->regs->fmnumber); + u16 reset_done = now + PORT_RESET_MSEC; + int limit_1 = DIV_ROUND_UP(PORT_RESET_MSEC, PORT_RESET_HW_MSEC); + + /* build a "continuous enough" reset signal, with up to + * 3msec gap between pulses. scheduler HZ==100 must work; + * this might need to be deadline-scheduled. + */ + do { + int limit_2; + + /* spin until any current reset finishes */ + limit_2 = PORT_RESET_HW_MSEC * 2; + while (--limit_2 >= 0) { + temp = ohci_readl (ohci, portstat); + /* handle e.g. CardBus eject */ + if (temp == ~(u32)0) + return -ESHUTDOWN; + if (!(temp & RH_PS_PRS)) + break; + udelay (500); + } + + /* timeout (a hardware error) has been observed when + * EHCI sets CF while this driver is resetting a port; + * presumably other disconnect paths might do it too. + */ + if (limit_2 < 0) { + ohci_dbg(ohci, + "port[%d] reset timeout, stat %08x\n", + port, temp); + break; + } + + if (!(temp & RH_PS_CCS)) + break; + if (temp & RH_PS_PRSC) + ohci_writel (ohci, RH_PS_PRSC, portstat); + + /* start the next reset, sleep till it's probably done */ + ohci_writel (ohci, RH_PS_PRS, portstat); + msleep(PORT_RESET_HW_MSEC); + now = ohci_readl(ohci, &ohci->regs->fmnumber); + } while (tick_before(now, reset_done) && --limit_1 >= 0); + + /* caller synchronizes using PRSC ... and handles PRS + * still being set when this returns. + */ + + return 0; +} + +int ohci_hub_control( + struct usb_hcd *hcd, + u16 typeReq, + u16 wValue, + u16 wIndex, + char *buf, + u16 wLength +) { + struct ohci_hcd *ohci = hcd_to_ohci (hcd); + int ports = ohci->num_ports; + u32 temp; + int retval = 0; + + if (unlikely(!HCD_HW_ACCESSIBLE(hcd))) + return -ESHUTDOWN; + + switch (typeReq) { + case ClearHubFeature: + switch (wValue) { + case C_HUB_OVER_CURRENT: + ohci_writel (ohci, RH_HS_OCIC, + &ohci->regs->roothub.status); + break; + case C_HUB_LOCAL_POWER: + break; + default: + goto error; + } + break; + case ClearPortFeature: + if (!wIndex || wIndex > ports) + goto error; + wIndex--; + + switch (wValue) { + case USB_PORT_FEAT_ENABLE: + temp = RH_PS_CCS; + break; + case USB_PORT_FEAT_C_ENABLE: + temp = RH_PS_PESC; + break; + case USB_PORT_FEAT_SUSPEND: + temp = RH_PS_POCI; + break; + case USB_PORT_FEAT_C_SUSPEND: + temp = RH_PS_PSSC; + break; + case USB_PORT_FEAT_POWER: + temp = RH_PS_LSDA; + break; + case USB_PORT_FEAT_C_CONNECTION: + temp = RH_PS_CSC; + break; + case USB_PORT_FEAT_C_OVER_CURRENT: + temp = RH_PS_OCIC; + break; + case USB_PORT_FEAT_C_RESET: + temp = RH_PS_PRSC; + break; + default: + goto error; + } + ohci_writel (ohci, temp, + &ohci->regs->roothub.portstatus [wIndex]); + // ohci_readl (ohci, &ohci->regs->roothub.portstatus [wIndex]); + break; + case GetHubDescriptor: + ohci_hub_descriptor (ohci, (struct usb_hub_descriptor *) buf); + break; + case GetHubStatus: + temp = roothub_status (ohci) & ~(RH_HS_CRWE | RH_HS_DRWE); + put_unaligned_le32(temp, buf); + break; + case GetPortStatus: + if (!wIndex || wIndex > ports) + goto error; + wIndex--; + temp = roothub_portstatus (ohci, wIndex); + put_unaligned_le32(temp, buf); + + if (*(u16*)(buf+2)) /* only if wPortChange is interesting */ + dbg_port(ohci, "GetStatus", wIndex, temp); + break; + case SetHubFeature: + switch (wValue) { + case C_HUB_OVER_CURRENT: + // FIXME: this can be cleared, yes? + case C_HUB_LOCAL_POWER: + break; + default: + goto error; + } + break; + case SetPortFeature: + if (!wIndex || wIndex > ports) + goto error; + wIndex--; + switch (wValue) { + case USB_PORT_FEAT_SUSPEND: +#ifdef CONFIG_USB_OTG + if (hcd->self.otg_port == (wIndex + 1) + && hcd->self.b_hnp_enable) + ohci->start_hnp(ohci); + else +#endif + ohci_writel (ohci, RH_PS_PSS, + &ohci->regs->roothub.portstatus [wIndex]); + break; + case USB_PORT_FEAT_POWER: + ohci_writel (ohci, RH_PS_PPS, + &ohci->regs->roothub.portstatus [wIndex]); + break; + case USB_PORT_FEAT_RESET: + retval = root_port_reset (ohci, wIndex); + break; + default: + goto error; + } + break; + + default: +error: + /* "protocol stall" on error */ + retval = -EPIPE; + } + return retval; +} +EXPORT_SYMBOL_GPL(ohci_hub_control); |