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authorDavid Brownell <david-b@pacbell.net>2006-08-15 02:11:06 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2006-09-26 00:08:37 -0400
commit185849991d592497e43bcd264c6152af1261ffe2 (patch)
tree856077e37e40bbda2af95fe64aaa92db626f30de /drivers/usb/host
parentc78a7c2dd913e68ce853d43edaba14eac91b2fd1 (diff)
PM: USB HCDs use PM_EVENT_PRETHAW
This teaches several USB host controller drivers to treat PRETHAW as a chip reset since the controller, and all devices connected to it, are no longer in states compatible with how the snapshotted suspend() left them. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Pavel Machek <pavel@ucw.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host')
-rw-r--r--drivers/usb/host/ehci-pci.c6
-rw-r--r--drivers/usb/host/ohci-pci.c5
-rw-r--r--drivers/usb/host/sl811-hcd.c9
-rw-r--r--drivers/usb/host/uhci-hcd.c4
4 files changed, 22 insertions, 2 deletions
diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
index cadffacd945b..6967ab71e282 100644
--- a/drivers/usb/host/ehci-pci.c
+++ b/drivers/usb/host/ehci-pci.c
@@ -238,6 +238,12 @@ static int ehci_pci_suspend(struct usb_hcd *hcd, pm_message_t message)
238 writel (0, &ehci->regs->intr_enable); 238 writel (0, &ehci->regs->intr_enable);
239 (void)readl(&ehci->regs->intr_enable); 239 (void)readl(&ehci->regs->intr_enable);
240 240
241 /* make sure snapshot being resumed re-enumerates everything */
242 if (message.event == PM_EVENT_PRETHAW) {
243 ehci_halt(ehci);
244 ehci_reset(ehci);
245 }
246
241 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); 247 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
242 bail: 248 bail:
243 spin_unlock_irqrestore (&ehci->lock, flags); 249 spin_unlock_irqrestore (&ehci->lock, flags);
diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c
index b268537e389e..37e122812b67 100644
--- a/drivers/usb/host/ohci-pci.c
+++ b/drivers/usb/host/ohci-pci.c
@@ -135,6 +135,11 @@ static int ohci_pci_suspend (struct usb_hcd *hcd, pm_message_t message)
135 } 135 }
136 ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable); 136 ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
137 (void)ohci_readl(ohci, &ohci->regs->intrdisable); 137 (void)ohci_readl(ohci, &ohci->regs->intrdisable);
138
139 /* make sure snapshot being resumed re-enumerates everything */
140 if (message.event == PM_EVENT_PRETHAW)
141 ohci_usb_reset(ohci);
142
138 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); 143 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
139 bail: 144 bail:
140 spin_unlock_irqrestore (&ohci->lock, flags); 145 spin_unlock_irqrestore (&ohci->lock, flags);
diff --git a/drivers/usb/host/sl811-hcd.c b/drivers/usb/host/sl811-hcd.c
index fa34092bbcde..9de115d9db27 100644
--- a/drivers/usb/host/sl811-hcd.c
+++ b/drivers/usb/host/sl811-hcd.c
@@ -1783,10 +1783,15 @@ sl811h_suspend(struct platform_device *dev, pm_message_t state)
1783 struct sl811 *sl811 = hcd_to_sl811(hcd); 1783 struct sl811 *sl811 = hcd_to_sl811(hcd);
1784 int retval = 0; 1784 int retval = 0;
1785 1785
1786 if (state.event == PM_EVENT_FREEZE) 1786 switch (state.event) {
1787 case PM_EVENT_FREEZE:
1787 retval = sl811h_bus_suspend(hcd); 1788 retval = sl811h_bus_suspend(hcd);
1788 else if (state.event == PM_EVENT_SUSPEND) 1789 break;
1790 case PM_EVENT_SUSPEND:
1791 case PM_EVENT_PRETHAW: /* explicitly discard hw state */
1789 port_power(sl811, 0); 1792 port_power(sl811, 0);
1793 break;
1794 }
1790 if (retval == 0) 1795 if (retval == 0)
1791 dev->dev.power.power_state = state; 1796 dev->dev.power.power_state = state;
1792 return retval; 1797 return retval;
diff --git a/drivers/usb/host/uhci-hcd.c b/drivers/usb/host/uhci-hcd.c
index 4151f618602d..b7402ceb3e93 100644
--- a/drivers/usb/host/uhci-hcd.c
+++ b/drivers/usb/host/uhci-hcd.c
@@ -734,6 +734,10 @@ static int uhci_suspend(struct usb_hcd *hcd, pm_message_t message)
734 734
735 /* FIXME: Enable non-PME# remote wakeup? */ 735 /* FIXME: Enable non-PME# remote wakeup? */
736 736
737 /* make sure snapshot being resumed re-enumerates everything */
738 if (message.event == PM_EVENT_PRETHAW)
739 uhci_hc_died(uhci);
740
737done_okay: 741done_okay:
738 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); 742 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
739done: 743done: