static int ehci_bus_suspend (struct usb_hcd *hcd) { struct ehci_hcd *ehci = hcd_to_ehci (hcd); int port; if (time_before (jiffies, ehci->next_statechange)) msleep(5); del_timer_sync(&ehci->watchdog); del_timer_sync(&ehci->iaa_watchdog); port = HCS_N_PORTS (ehci->hcs_params); spin_lock_irq (&ehci->lock); /* stop schedules, clean any completed work */ if (HC_IS_RUNNING(hcd->state)) { ehci_quiesce (ehci); hcd->state = HC_STATE_QUIESCING; } ehci->command = readl (&ehci->regs->command); if (ehci->reclaim) end_unlink_async(ehci, NULL); ehci_work(ehci, NULL); /* suspend any active/unsuspended ports, maybe allow wakeup */ while (port--) { u32 __iomem *reg = &ehci->regs->port_status [port]; u32 t1 = readl (reg) & ~PORT_RWC_BITS; u32 t2 = t1; if ((t1 & PORT_PE) && !(t1 & PORT_OWNER)) t2 |= PORT_SUSPEND; if (device_may_wakeup(&hcd->self.root_hub->dev)) { t2 &= ~(PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E); t2 |= PORT_WKOC_E; } else { t2 &= ~(PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E); } if (t1 != t2) { ehci_vdbg (ehci, "port %d, %08x -> %08x\n", port + 1, t1, t2); writel (t2, reg); } } /* turn off now-idle HC */ ehci_halt (ehci); hcd->state = HC_STATE_SUSPENDED; ehci->next_statechange = jiffies + msecs_to_jiffies(10); spin_unlock_irq (&ehci->lock); return 0; }
/* * Called when the ehci_hcd module is removed. */ static void ehci_stop (struct usb_hcd *hcd) { struct ehci_hcd *ehci = hcd_to_ehci (hcd); ehci_dbg (ehci, "stop\n"); /* no more interrupts ... */ del_timer_sync (&ehci->watchdog); del_timer_sync(&ehci->iaa_watchdog); spin_lock_irq(&ehci->lock); if (HC_IS_RUNNING (hcd->state)) ehci_quiesce (ehci); ehci_silence_controller(ehci); ehci_reset (ehci); spin_unlock_irq(&ehci->lock); remove_companion_file(ehci); remove_debug_files (ehci); /* root hub is shut down separately (first, when possible) */ spin_lock_irq (&ehci->lock); if (ehci->async) ehci_work (ehci); spin_unlock_irq (&ehci->lock); ehci_mem_cleanup (ehci); #ifdef EHCI_STATS ehci_dbg (ehci, "irq normal %ld err %ld reclaim %ld (lost %ld)\n", ehci->stats.normal, ehci->stats.error, ehci->stats.reclaim, ehci->stats.lost_iaa); ehci_dbg (ehci, "complete %ld unlink %ld\n", ehci->stats.complete, ehci->stats.unlink); #endif dbg_status (ehci, "ehci_stop completed", ehci_readl(ehci, &ehci->regs->status)); }
static int ehci_hub_control ( struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex, char *buf, u16 wLength ) { struct ehci_hcd *ehci = hcd_to_ehci (hcd); int ports = HCS_N_PORTS (ehci->hcs_params); u32 temp, status; unsigned long flags; int retval = 0; unsigned selector; /* * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. * HCS_INDICATOR may say we can change LEDs to off/amber/green. * (track current state ourselves) ... blink for diagnostics, * power, "this is the one", etc. EHCI spec supports this. */ spin_lock_irqsave (&ehci->lock, flags); switch (typeReq) { case ClearHubFeature: switch (wValue) { case C_HUB_LOCAL_POWER: case C_HUB_OVER_CURRENT: /* no hub-wide feature/status flags */ break; default: goto error; } break; case ClearPortFeature: if (!wIndex || wIndex > ports) goto error; wIndex--; temp = ehci_readl(ehci, &ehci->regs->port_status [wIndex]); if (temp & PORT_OWNER) break; switch (wValue) { case USB_PORT_FEAT_ENABLE: ehci_writel(ehci, temp & ~PORT_PE, &ehci->regs->port_status [wIndex]); break; case USB_PORT_FEAT_C_ENABLE: ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_PEC, &ehci->regs->port_status [wIndex]); break; case USB_PORT_FEAT_SUSPEND: if (temp & PORT_RESET) goto error; if (ehci->no_selective_suspend) break; if (temp & PORT_SUSPEND) { if ((temp & PORT_PE) == 0) goto error; /* resume signaling for 20 msec */ temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); ehci_writel(ehci, temp | PORT_RESUME, &ehci->regs->port_status [wIndex]); ehci->reset_done [wIndex] = jiffies + msecs_to_jiffies (20); } break; case USB_PORT_FEAT_C_SUSPEND: /* we auto-clear this feature */ break; case USB_PORT_FEAT_POWER: if (HCS_PPC (ehci->hcs_params)) ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_POWER), &ehci->regs->port_status [wIndex]); break; case USB_PORT_FEAT_C_CONNECTION: ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC, &ehci->regs->port_status [wIndex]); break; case USB_PORT_FEAT_C_OVER_CURRENT: ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC, &ehci->regs->port_status [wIndex]); break; case USB_PORT_FEAT_C_RESET: /* GetPortStatus clears reset */ break; default: goto error; } ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */ break; case GetHubDescriptor: ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *) buf); break; case GetHubStatus: /* no hub-wide feature/status flags */ memset (buf, 0, 4); //cpu_to_le32s ((u32 *) buf); break; case GetPortStatus: if (!wIndex || wIndex > ports) goto error; wIndex--; status = 0; temp = ehci_readl(ehci, &ehci->regs->port_status [wIndex]); // wPortChange bits if (temp & PORT_CSC) status |= 1 << USB_PORT_FEAT_C_CONNECTION; if (temp & PORT_PEC) status |= 1 << USB_PORT_FEAT_C_ENABLE; if ((temp & PORT_OCC) && !ignore_oc) status |= 1 << USB_PORT_FEAT_C_OVER_CURRENT; /* whoever resumes must GetPortStatus to complete it!! */ if ((temp & PORT_RESUME) && time_after (jiffies, ehci->reset_done [wIndex])) { status |= 1 << USB_PORT_FEAT_C_SUSPEND; ehci->reset_done [wIndex] = 0; /* stop resume signaling */ temp = ehci_readl(ehci, &ehci->regs->port_status [wIndex]); ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESUME), &ehci->regs->port_status [wIndex]); retval = handshake(ehci, &ehci->regs->port_status [wIndex], PORT_RESUME, 0, 2000 /* 2msec */); if (retval != 0) { ehci_err (ehci, "port %d resume error %d\n", wIndex + 1, retval); goto error; } temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10)); } /* whoever resets must GetPortStatus to complete it!! */ if ((temp & PORT_RESET) && time_after (jiffies, ehci->reset_done [wIndex])) { status |= 1 << USB_PORT_FEAT_C_RESET; ehci->reset_done [wIndex] = 0; /* force reset to complete */ ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), &ehci->regs->port_status [wIndex]); /* REVISIT: some hardware needs 550+ usec to clear * this bit; seems too long to spin routinely... */ retval = handshake(ehci, &ehci->regs->port_status [wIndex], PORT_RESET, 0, 750); if (retval != 0) { ehci_err (ehci, "port %d reset error %d\n", wIndex + 1, retval); goto error; } /* see what we found out */ temp = check_reset_complete (ehci, wIndex, ehci_readl(ehci, &ehci->regs->port_status [wIndex])); } // don't show wPortStatus if it's owned by a companion hc if (!(temp & PORT_OWNER)) { if (temp & PORT_CONNECT) { status |= 1 << USB_PORT_FEAT_CONNECTION; // status may be from integrated TT status |= ehci_port_speed(ehci, temp); } if (temp & PORT_PE) status |= 1 << USB_PORT_FEAT_ENABLE; if (temp & (PORT_SUSPEND|PORT_RESUME)) status |= 1 << USB_PORT_FEAT_SUSPEND; if (temp & PORT_OC) status |= 1 << USB_PORT_FEAT_OVER_CURRENT; if (temp & PORT_RESET) status |= 1 << USB_PORT_FEAT_RESET; if (temp & PORT_POWER) status |= 1 << USB_PORT_FEAT_POWER; } #ifndef EHCI_VERBOSE_DEBUG if (status & ~0xffff) /* only if wPortChange is interesting */ #endif dbg_port (ehci, "GetStatus", wIndex + 1, temp); // we "know" this alignment is good, caller used kmalloc()... *((__le32 *) buf) = cpu_to_le32 (status); break; case SetHubFeature: switch (wValue) { case C_HUB_LOCAL_POWER: case C_HUB_OVER_CURRENT: /* no hub-wide feature/status flags */ break; default: goto error; } break; case SetPortFeature: selector = wIndex >> 8; wIndex &= 0xff; if (!wIndex || wIndex > ports) goto error; wIndex--; temp = ehci_readl(ehci, &ehci->regs->port_status [wIndex]); if (temp & PORT_OWNER) break; temp &= ~PORT_RWC_BITS; switch (wValue) { case USB_PORT_FEAT_SUSPEND: if (ehci->no_selective_suspend) break; if ((temp & PORT_PE) == 0 || (temp & PORT_RESET) != 0) goto error; if (device_may_wakeup(&hcd->self.root_hub->dev)) temp |= PORT_WAKE_BITS; ehci_writel(ehci, temp | PORT_SUSPEND, &ehci->regs->port_status [wIndex]); break; case USB_PORT_FEAT_POWER: if (HCS_PPC (ehci->hcs_params)) ehci_writel(ehci, temp | PORT_POWER, &ehci->regs->port_status [wIndex]); break; case USB_PORT_FEAT_RESET: if (temp & PORT_RESUME) goto error; /* line status bits may report this as low speed, * which can be fine if this root hub has a * transaction translator built in. */ if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT && !ehci_is_TDI(ehci) && PORT_USB11 (temp)) { ehci_dbg (ehci, "port %d low speed --> companion\n", wIndex + 1); temp |= PORT_OWNER; } else { ehci_vdbg (ehci, "port %d reset\n", wIndex + 1); temp |= PORT_RESET; temp &= ~PORT_PE; /* * caller must wait, then call GetPortStatus * usb 2.0 spec says 50 ms resets on root */ ehci->reset_done [wIndex] = jiffies + msecs_to_jiffies (50); } ehci_writel(ehci, temp, &ehci->regs->port_status [wIndex]); break; /* For downstream facing ports (these): one hub port is put * into test mode according to USB2 11.24.2.13, then the hub * must be reset (which for root hub now means rmmod+modprobe, * or else system reboot). See EHCI 2.3.9 and 4.14 for info * about the EHCI-specific stuff. */ case USB_PORT_FEAT_TEST: if (!selector || selector > 5) goto error; ehci_quiesce(ehci); ehci_halt(ehci); temp |= selector << 16; ehci_writel(ehci, temp, &ehci->regs->port_status [wIndex]); break; default: goto error; } ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ break; default: error: /* "stall" on error */ retval = -EPIPE; } spin_unlock_irqrestore (&ehci->lock, flags); return retval; }
static int ehci_bus_suspend (struct usb_hcd *hcd) { struct ehci_hcd *ehci = hcd_to_ehci (hcd); int port; int mask; if (time_before (jiffies, ehci->next_statechange)) msleep(5); port = HCS_N_PORTS (ehci->hcs_params); spin_lock_irq (&ehci->lock); /* stop schedules, clean any completed work */ if (HC_IS_RUNNING(hcd->state)) { ehci_quiesce (ehci); hcd->state = HC_STATE_QUIESCING; } ehci->command = ehci_readl(ehci, &ehci->regs->command); if (ehci->reclaim) ehci->reclaim_ready = 1; ehci_work(ehci, NULL); /* Unlike other USB host controller types, EHCI doesn't have * any notion of "global" or bus-wide suspend. The driver has * to manually suspend all the active unsuspended ports, and * then manually resume them in the bus_resume() routine. */ ehci->bus_suspended = 0; while (port--) { u32 __iomem *reg = &ehci->regs->port_status [port]; u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; u32 t2 = t1; /* keep track of which ports we suspend */ if ((t1 & PORT_PE) && !(t1 & PORT_OWNER) && !(t1 & PORT_SUSPEND)) { t2 |= PORT_SUSPEND; set_bit(port, &ehci->bus_suspended); } /* enable remote wakeup on all ports */ if (device_may_wakeup(&hcd->self.root_hub->dev)) t2 |= PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E; else t2 &= ~(PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E); if (t1 != t2) { ehci_vdbg (ehci, "port %d, %08x -> %08x\n", port + 1, t1, t2); ehci_writel(ehci, t2, reg); } } /* turn off now-idle HC */ del_timer_sync (&ehci->watchdog); ehci_halt (ehci); hcd->state = HC_STATE_SUSPENDED; /* allow remote wakeup */ mask = INTR_MASK; if (!device_may_wakeup(&hcd->self.root_hub->dev)) mask &= ~STS_PCD; ehci_writel(ehci, mask, &ehci->regs->intr_enable); ehci_readl(ehci, &ehci->regs->intr_enable); ehci->next_statechange = jiffies + msecs_to_jiffies(10); spin_unlock_irq (&ehci->lock); return 0; }