/*
* 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
*/
(temp & RH_PS_PSSC) ? " PSSC" : "", \
(temp & RH_PS_PESC) ? " PESC" : "", \
(temp & RH_PS_CSC) ? " CSC" : "", \
- \
+ \
(temp & RH_PS_LSDA) ? " LSDA" : "", \
(temp & RH_PS_PPS) ? " PPS" : "", \
(temp & RH_PS_PRS) ? " PRS" : "", \
(temp & RH_PS_POCI) ? " POCI" : "", \
(temp & RH_PS_PSS) ? " PSS" : "", \
- \
+ \
(temp & RH_PS_PES) ? " PES" : "", \
(temp & RH_PS_CCS) ? " CCS" : "" \
);
{
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
- ohci_writel (ohci, OHCI_INTR_RHSC, &ohci->regs->intrenable);
+ spin_lock_irq(&ohci->lock);
+ if (!ohci->autostop)
+ del_timer(&hcd->rh_timer); /* Prevent next poll */
+ ohci_writel(ohci, OHCI_INTR_RHSC, &ohci->regs->intrenable);
+ spin_unlock_irq(&ohci->lock);
}
#define OHCI_SCHED_ENABLES \
(OHCI_CTRL_CLE|OHCI_CTRL_BLE|OHCI_CTRL_PLE|OHCI_CTRL_IE)
-static void dl_done_list (struct ohci_hcd *, struct pt_regs *);
-static void finish_unlinks (struct ohci_hcd *, u16 , struct pt_regs *);
+static void dl_done_list (struct ohci_hcd *);
+static void finish_unlinks (struct ohci_hcd *, u16);
+
+#ifdef CONFIG_PM
+static int ohci_restart(struct ohci_hcd *ohci);
static int ohci_rh_suspend (struct ohci_hcd *ohci, int autostop)
__releases(ohci->lock)
msleep (8);
spin_lock_irq (&ohci->lock);
}
- dl_done_list (ohci, NULL);
- finish_unlinks (ohci, ohci_frame_no(ohci), NULL);
+ dl_done_list (ohci);
+ finish_unlinks (ohci, ohci_frame_no(ohci));
/* maybe resume can wake root hub */
if (device_may_wakeup(&ohci_to_hcd(ohci)->self.root_hub->dev) ||
return ed;
}
-static int ohci_restart (struct ohci_hcd *ohci);
-
/* caller has locked the root hub */
static int ohci_rh_resume (struct ohci_hcd *ohci)
__releases(ohci->lock)
break;
case OHCI_USB_RESUME:
/* HCFS changes sometime after INTR_RD */
- ohci_info (ohci, "wakeup\n");
+ 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, "lost power\n");
status = -EBUSY;
}
-#ifdef CONFIG_PM
if (status == -EBUSY) {
if (!autostopped) {
spin_unlock_irq (&ohci->lock);
}
return status;
}
-#endif
if (status != -EINPROGRESS)
return status;
if (autostopped)
goto skip_resume;
spin_unlock_irq (&ohci->lock);
- temp = ohci->num_ports;
- while (temp--) {
- u32 stat = ohci_readl (ohci,
- &ohci->regs->roothub.portstatus [temp]);
-
- /* force global, not selective, resume */
- if (!(stat & RH_PS_PSS))
- continue;
- ohci_writel (ohci, RH_PS_POCI,
- &ohci->regs->roothub.portstatus [temp]);
- }
-
/* Some controllers (lucent erratum) need extra-long delays */
msleep (20 /* usb 11.5.1.10 */ + 12 /* 32 msec counter */ + 1);
temp &= OHCI_CTRL_HCFS;
if (temp != OHCI_USB_RESUME) {
ohci_err (ohci, "controller won't resume\n");
+ spin_lock_irq(&ohci->lock);
return -EBUSY;
}
return 0;
}
-#ifdef CONFIG_PM
-
static int ohci_bus_suspend (struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci (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 poll_rh = 1;
+
+ switch (ohci->hc_control & OHCI_CTRL_HCFS) {
+
+ case OHCI_USB_OPER:
+ /* keep on polling until we know a device is connected
+ * and RHSC is enabled */
+ if (!ohci->autostop) {
+ if (any_connected ||
+ !device_may_wakeup(&ohci_to_hcd(ohci)
+ ->self.root_hub->dev)) {
+ if (ohci_readl(ohci, &ohci->regs->intrenable) &
+ OHCI_INTR_RHSC)
+ 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);
+ }
+ }
+ break;
+
+ /* if there is a port change, autostart or ask to be resumed */
+ case OHCI_USB_SUSPEND:
+ case OHCI_USB_RESUME:
+ if (changed) {
+ if (ohci->autostop)
+ ohci_rh_resume(ohci);
+ else
+ usb_hcd_resume_root_hub(ohci_to_hcd(ohci));
+ } else {
+ /* everything is idle, no need for polling */
+ 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 poll_rh = 1;
+
+ /* keep on polling until RHSC is enabled */
+ if (ohci_readl(ohci, &ohci->regs->intrenable) & OHCI_INTR_RHSC)
+ poll_rh = 0;
+ return poll_rh;
+}
+
#endif /* CONFIG_PM */
/*-------------------------------------------------------------------------*/
{
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
int i, changed = 0, length = 1;
- int any_connected = 0, rhsc_enabled = 1;
+ int any_connected = 0;
unsigned long flags;
spin_lock_irqsave (&ohci->lock, flags);
}
}
- /* NOTE: vendors didn't always make the same implementation
- * choices for RHSC. Sometimes it triggers on an edge (like
- * setting and maybe clearing a port status change bit); and
- * it's level-triggered on other silicon, active until khubd
- * clears all active port status change bits. If it's still
- * set (level-triggered) we must disable it and rely on
- * polling until khubd re-enables it.
- */
- if (ohci_readl (ohci, &ohci->regs->intrstatus) & OHCI_INTR_RHSC) {
- ohci_writel (ohci, OHCI_INTR_RHSC, &ohci->regs->intrdisable);
- (void) ohci_readl (ohci, &ohci->regs->intrdisable);
- rhsc_enabled = 0;
- }
- hcd->poll_rh = 1;
-
- /* carry out appropriate state changes */
- switch (ohci->hc_control & OHCI_CTRL_HCFS) {
-
- case OHCI_USB_OPER:
- /* keep on polling until we know a device is connected
- * and RHSC is enabled */
- if (!ohci->autostop) {
- if (any_connected) {
- if (rhsc_enabled)
- hcd->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);
- }
- }
- break;
-
- /* if there is a port change, autostart or ask to be resumed */
- case OHCI_USB_SUSPEND:
- case OHCI_USB_RESUME:
- if (changed) {
- if (ohci->autostop)
- ohci_rh_resume (ohci);
- else
- usb_hcd_resume_root_hub (hcd);
- } else {
- /* everything is idle, no need for polling */
- hcd->poll_rh = 0;
- }
- break;
- }
+ hcd->poll_rh = ohci_root_hub_state_changes(ohci, changed,
+ any_connected);
done:
spin_unlock_irqrestore (&ohci->lock, flags);
temp = 0;
if (rh & RH_A_NPS) /* no power switching? */
temp |= 0x0002;
- if (rh & RH_A_PSM) /* per-port power switching? */
+ if (rh & RH_A_PSM) /* per-port power switching? */
temp |= 0x0001;
if (rh & RH_A_NOCP) /* no overcurrent reporting? */
temp |= 0x0010;
#define tick_before(t1,t2) ((s16)(((s16)(t1))-((s16)(t2))) < 0)
/* called from some task, normally khubd */
-static inline void root_port_reset (struct ohci_hcd *ohci, unsigned port)
+static inline int root_port_reset (struct ohci_hcd *ohci, unsigned port)
{
__hc32 __iomem *portstat = &ohci->regs->roothub.portstatus [port];
u32 temp;
/* spin until any current reset finishes */
for (;;) {
temp = ohci_readl (ohci, portstat);
+ /* handle e.g. CardBus eject */
+ if (temp == ~(u32)0)
+ return -ESHUTDOWN;
if (!(temp & RH_PS_PRS))
break;
udelay (500);
- }
+ }
if (!(temp & RH_PS_CCS))
break;
now = ohci_readl(ohci, &ohci->regs->fmnumber);
} while (tick_before(now, reset_done));
/* caller synchronizes using PRSC */
+
+ return 0;
}
static int ohci_hub_control (
&ohci->regs->roothub.portstatus [wIndex]);
break;
case USB_PORT_FEAT_RESET:
- root_port_reset (ohci, wIndex);
+ retval = root_port_reset (ohci, wIndex);
break;
default:
goto error;
git.openpandora.org / pandora-kernel.git / blobdiff