diff options
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/usb/host/ehci-au1xxx.c | 16 | ||||
-rw-r--r-- | drivers/usb/host/ehci-fsl.c | 2 | ||||
-rw-r--r-- | drivers/usb/host/ehci-hub.c | 173 | ||||
-rw-r--r-- | drivers/usb/host/ehci-pci.c | 15 | ||||
-rw-r--r-- | drivers/usb/host/ehci.h | 10 |
5 files changed, 145 insertions, 71 deletions
diff --git a/drivers/usb/host/ehci-au1xxx.c b/drivers/usb/host/ehci-au1xxx.c index 7a27b7c4ee84..faa61748db70 100644 --- a/drivers/usb/host/ehci-au1xxx.c +++ b/drivers/usb/host/ehci-au1xxx.c @@ -224,26 +224,17 @@ static int ehci_hcd_au1xxx_drv_suspend(struct device *dev) msleep(10); /* Root hub was already suspended. Disable irq emission and - * mark HW unaccessible, bail out if RH has been resumed. Use - * the spinlock to properly synchronize with possible pending - * RH suspend or resume activity. - * - * This is still racy as hcd->state is manipulated outside of - * any locks =P But that will be a different fix. + * mark HW unaccessible. The PM and USB cores make sure that + * the root hub is either suspended or stopped. */ spin_lock_irqsave(&ehci->lock, flags); - if (hcd->state != HC_STATE_SUSPENDED) { - rc = -EINVAL; - goto bail; - } + ehci_prepare_ports_for_controller_suspend(ehci); ehci_writel(ehci, 0, &ehci->regs->intr_enable); (void)ehci_readl(ehci, &ehci->regs->intr_enable); clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); au1xxx_stop_ehc(); - -bail: spin_unlock_irqrestore(&ehci->lock, flags); // could save FLADJ in case of Vaux power loss @@ -273,6 +264,7 @@ static int ehci_hcd_au1xxx_drv_resume(struct device *dev) if (ehci_readl(ehci, &ehci->regs->configured_flag) == FLAG_CF) { int mask = INTR_MASK; + ehci_prepare_ports_for_controller_resume(ehci); if (!hcd->self.root_hub->do_remote_wakeup) mask &= ~STS_PCD; ehci_writel(ehci, mask, &ehci->regs->intr_enable); diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c index 0e26aa13f158..5cd967d28938 100644 --- a/drivers/usb/host/ehci-fsl.c +++ b/drivers/usb/host/ehci-fsl.c @@ -313,6 +313,7 @@ static int ehci_fsl_drv_suspend(struct device *dev) struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd); void __iomem *non_ehci = hcd->regs; + ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd)); if (!fsl_deep_sleep()) return 0; @@ -327,6 +328,7 @@ static int ehci_fsl_drv_resume(struct device *dev) struct ehci_hcd *ehci = hcd_to_ehci(hcd); void __iomem *non_ehci = hcd->regs; + ehci_prepare_ports_for_controller_resume(ehci); if (!fsl_deep_sleep()) return 0; diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c index ef956220f854..e7d3d8def282 100644 --- a/drivers/usb/host/ehci-hub.c +++ b/drivers/usb/host/ehci-hub.c @@ -106,12 +106,75 @@ static void ehci_handover_companion_ports(struct ehci_hcd *ehci) ehci->owned_ports = 0; } +static void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci, + bool suspending) +{ + int port; + u32 temp; + + /* If remote wakeup is enabled for the root hub but disabled + * for the controller, we must adjust all the port wakeup flags + * when the controller is suspended or resumed. In all other + * cases they don't need to be changed. + */ + if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || + device_may_wakeup(ehci_to_hcd(ehci)->self.controller)) + return; + + /* clear phy low-power mode before changing wakeup flags */ + if (ehci->has_hostpc) { + port = HCS_N_PORTS(ehci->hcs_params); + while (port--) { + u32 __iomem *hostpc_reg; + + hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs + + HOSTPC0 + 4 * port); + temp = ehci_readl(ehci, hostpc_reg); + ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg); + } + msleep(5); + } + + port = HCS_N_PORTS(ehci->hcs_params); + while (port--) { + u32 __iomem *reg = &ehci->regs->port_status[port]; + u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; + u32 t2 = t1 & ~PORT_WAKE_BITS; + + /* If we are suspending the controller, clear the flags. + * If we are resuming the controller, set the wakeup flags. + */ + if (!suspending) { + if (t1 & PORT_CONNECT) + t2 |= PORT_WKOC_E | PORT_WKDISC_E; + else + t2 |= PORT_WKOC_E | PORT_WKCONN_E; + } + ehci_vdbg(ehci, "port %d, %08x -> %08x\n", + port + 1, t1, t2); + ehci_writel(ehci, t2, reg); + } + + /* enter phy low-power mode again */ + if (ehci->has_hostpc) { + port = HCS_N_PORTS(ehci->hcs_params); + while (port--) { + u32 __iomem *hostpc_reg; + + hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs + + HOSTPC0 + 4 * port); + temp = ehci_readl(ehci, hostpc_reg); + ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg); + } + } +} + static int ehci_bus_suspend (struct usb_hcd *hcd) { struct ehci_hcd *ehci = hcd_to_ehci (hcd); int port; int mask; - u32 __iomem *hostpc_reg = NULL; + int changed; ehci_dbg(ehci, "suspend root hub\n"); @@ -155,15 +218,13 @@ static int ehci_bus_suspend (struct usb_hcd *hcd) */ ehci->bus_suspended = 0; ehci->owned_ports = 0; + changed = 0; port = HCS_N_PORTS(ehci->hcs_params); while (port--) { u32 __iomem *reg = &ehci->regs->port_status [port]; u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; - u32 t2 = t1; + u32 t2 = t1 & ~PORT_WAKE_BITS; - if (ehci->has_hostpc) - hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs - + HOSTPC0 + 4 * (port & 0xff)); /* keep track of which ports we suspend */ if (t1 & PORT_OWNER) set_bit(port, &ehci->owned_ports); @@ -172,40 +233,45 @@ static int ehci_bus_suspend (struct usb_hcd *hcd) set_bit(port, &ehci->bus_suspended); } - /* enable remote wakeup on all ports */ + /* enable remote wakeup on all ports, if told to do so */ if (hcd->self.root_hub->do_remote_wakeup) { /* only enable appropriate wake bits, otherwise the * hardware can not go phy low power mode. If a race * condition happens here(connection change during bits * set), the port change detection will finally fix it. */ - if (t1 & PORT_CONNECT) { + if (t1 & PORT_CONNECT) t2 |= PORT_WKOC_E | PORT_WKDISC_E; - t2 &= ~PORT_WKCONN_E; - } else { + else t2 |= PORT_WKOC_E | PORT_WKCONN_E; - t2 &= ~PORT_WKDISC_E; - } - } else - t2 &= ~PORT_WAKE_BITS; + } if (t1 != t2) { ehci_vdbg (ehci, "port %d, %08x -> %08x\n", port + 1, t1, t2); ehci_writel(ehci, t2, reg); - if (hostpc_reg) { - u32 t3; + changed = 1; + } + } - spin_unlock_irq(&ehci->lock); - msleep(5);/* 5ms for HCD enter low pwr mode */ - spin_lock_irq(&ehci->lock); - t3 = ehci_readl(ehci, hostpc_reg); - ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg); - t3 = ehci_readl(ehci, hostpc_reg); - ehci_dbg(ehci, "Port%d phy low pwr mode %s\n", + if (changed && ehci->has_hostpc) { + spin_unlock_irq(&ehci->lock); + msleep(5); /* 5 ms for HCD to enter low-power mode */ + spin_lock_irq(&ehci->lock); + + port = HCS_N_PORTS(ehci->hcs_params); + while (port--) { + u32 __iomem *hostpc_reg; + u32 t3; + + hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs + + HOSTPC0 + 4 * port); + t3 = ehci_readl(ehci, hostpc_reg); + ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg); + t3 = ehci_readl(ehci, hostpc_reg); + ehci_dbg(ehci, "Port %d phy low-power mode %s\n", port, (t3 & HOSTPC_PHCD) ? "succeeded" : "failed"); - } } } @@ -291,19 +357,28 @@ static int ehci_bus_resume (struct usb_hcd *hcd) msleep(8); spin_lock_irq(&ehci->lock); + /* clear phy low-power mode before resume */ + if (ehci->bus_suspended && ehci->has_hostpc) { + i = HCS_N_PORTS(ehci->hcs_params); + while (i--) { + if (test_bit(i, &ehci->bus_suspended)) { + u32 __iomem *hostpc_reg; + + hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs + + HOSTPC0 + 4 * i); + temp = ehci_readl(ehci, hostpc_reg); + ehci_writel(ehci, temp & ~HOSTPC_PHCD, + hostpc_reg); + } + } + spin_unlock_irq(&ehci->lock); + msleep(5); + spin_lock_irq(&ehci->lock); + } + /* manually resume the ports we suspended during bus_suspend() */ i = HCS_N_PORTS (ehci->hcs_params); while (i--) { - /* clear phy low power mode before resume */ - if (ehci->has_hostpc) { - u32 __iomem *hostpc_reg = - (u32 __iomem *)((u8 *)ehci->regs - + HOSTPC0 + 4 * (i & 0xff)); - temp = ehci_readl(ehci, hostpc_reg); - ehci_writel(ehci, temp & ~HOSTPC_PHCD, - hostpc_reg); - mdelay(5); - } temp = ehci_readl(ehci, &ehci->regs->port_status [i]); temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); if (test_bit(i, &ehci->bus_suspended) && @@ -685,23 +760,25 @@ static int ehci_hub_control ( goto error; if (ehci->no_selective_suspend) break; - if (temp & PORT_SUSPEND) { - if ((temp & PORT_PE) == 0) - goto error; - /* clear phy low power mode before resume */ - if (hostpc_reg) { - temp1 = ehci_readl(ehci, hostpc_reg); - ehci_writel(ehci, temp1 & ~HOSTPC_PHCD, + if (!(temp & PORT_SUSPEND)) + break; + if ((temp & PORT_PE) == 0) + goto error; + + /* clear phy low-power mode before resume */ + if (hostpc_reg) { + temp1 = ehci_readl(ehci, hostpc_reg); + ehci_writel(ehci, temp1 & ~HOSTPC_PHCD, hostpc_reg); - mdelay(5); - } - /* resume signaling for 20 msec */ - temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); - ehci_writel(ehci, temp | PORT_RESUME, - status_reg); - ehci->reset_done [wIndex] = jiffies - + msecs_to_jiffies (20); + spin_unlock_irqrestore(&ehci->lock, flags); + msleep(5);/* wait to leave low-power mode */ + spin_lock_irqsave(&ehci->lock, flags); } + /* resume signaling for 20 msec */ + temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); + ehci_writel(ehci, temp | PORT_RESUME, status_reg); + ehci->reset_done[wIndex] = jiffies + + msecs_to_jiffies(20); break; case USB_PORT_FEAT_C_SUSPEND: clear_bit(wIndex, &ehci->port_c_suspend); diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c index d120059bbbf7..d43d176161aa 100644 --- a/drivers/usb/host/ehci-pci.c +++ b/drivers/usb/host/ehci-pci.c @@ -287,23 +287,15 @@ static int ehci_pci_suspend(struct usb_hcd *hcd) msleep(10); /* Root hub was already suspended. Disable irq emission and - * mark HW unaccessible, bail out if RH has been resumed. Use - * the spinlock to properly synchronize with possible pending - * RH suspend or resume activity. - * - * This is still racy as hcd->state is manipulated outside of - * any locks =P But that will be a different fix. + * mark HW unaccessible. The PM and USB cores make sure that + * the root hub is either suspended or stopped. */ spin_lock_irqsave (&ehci->lock, flags); - if (hcd->state != HC_STATE_SUSPENDED) { - rc = -EINVAL; - goto bail; - } + ehci_prepare_ports_for_controller_suspend(ehci); ehci_writel(ehci, 0, &ehci->regs->intr_enable); (void)ehci_readl(ehci, &ehci->regs->intr_enable); clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); - bail: spin_unlock_irqrestore (&ehci->lock, flags); // could save FLADJ in case of Vaux power loss @@ -333,6 +325,7 @@ static int ehci_pci_resume(struct usb_hcd *hcd, bool hibernated) !hibernated) { int mask = INTR_MASK; + ehci_prepare_ports_for_controller_resume(ehci); if (!hcd->self.root_hub->do_remote_wakeup) mask &= ~STS_PCD; ehci_writel(ehci, mask, &ehci->regs->intr_enable); diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h index 4ebe9ad209e4..650a687f2854 100644 --- a/drivers/usb/host/ehci.h +++ b/drivers/usb/host/ehci.h @@ -536,6 +536,16 @@ struct ehci_fstn { /*-------------------------------------------------------------------------*/ +/* Prepare the PORTSC wakeup flags during controller suspend/resume */ + +#define ehci_prepare_ports_for_controller_suspend(ehci) \ + ehci_adjust_port_wakeup_flags(ehci, true); + +#define ehci_prepare_ports_for_controller_resume(ehci) \ + ehci_adjust_port_wakeup_flags(ehci, false); + +/*-------------------------------------------------------------------------*/ + #ifdef CONFIG_USB_EHCI_ROOT_HUB_TT /* |