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path: root/drivers/usb/host/ohci-hub.c
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Diffstat (limited to 'drivers/usb/host/ohci-hub.c')
-rw-r--r--drivers/usb/host/ohci-hub.c128
1 files changed, 51 insertions, 77 deletions
diff --git a/drivers/usb/host/ohci-hub.c b/drivers/usb/host/ohci-hub.c
index 32bbce9718f..b4940de1eba 100644
--- a/drivers/usb/host/ohci-hub.c
+++ b/drivers/usb/host/ohci-hub.c
@@ -90,6 +90,24 @@ __acquires(ohci->lock)
dl_done_list (ohci);
finish_unlinks (ohci, ohci_frame_no(ohci));
+ /*
+ * 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;
@@ -111,6 +129,7 @@ __acquires(ohci->lock)
if (!autostop) {
ohci->next_statechange = jiffies + msecs_to_jiffies (5);
ohci->autostop = 0;
+ ohci->rh_state = OHCI_RH_SUSPENDED;
}
done:
@@ -140,7 +159,7 @@ __acquires(ohci->lock)
if (ohci->hc_control & (OHCI_CTRL_IR | OHCI_SCHED_ENABLES)) {
/* this can happen after resuming a swsusp snapshot */
- if (hcd->state == HC_STATE_RESUMING) {
+ if (ohci->rh_state != OHCI_RH_RUNNING) {
ohci_dbg (ohci, "BIOS/SMM active, control %03x\n",
ohci->hc_control);
status = -EBUSY;
@@ -175,7 +194,6 @@ __acquires(ohci->lock)
if (status == -EBUSY) {
if (!autostopped) {
spin_unlock_irq (&ohci->lock);
- (void) ohci_init (ohci);
status = ohci_restart (ohci);
usb_root_hub_lost_power(hcd->self.root_hub);
@@ -212,10 +230,11 @@ __acquires(ohci->lock)
/* 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
+ /*
+ * 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);
@@ -274,6 +293,7 @@ skip_resume:
(void) ohci_readl (ohci, &ohci->regs->control);
}
+ ohci->rh_state = OHCI_RH_RUNNING;
return 0;
}
@@ -284,7 +304,7 @@ static int ohci_bus_suspend (struct usb_hcd *hcd)
spin_lock_irq (&ohci->lock);
- if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
+ if (unlikely(!HCD_HW_ACCESSIBLE(hcd)))
rc = -ESHUTDOWN;
else
rc = ohci_rh_suspend (ohci, 0);
@@ -302,7 +322,7 @@ static int ohci_bus_resume (struct usb_hcd *hcd)
spin_lock_irq (&ohci->lock);
- if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
+ if (unlikely(!HCD_HW_ACCESSIBLE(hcd)))
rc = -ESHUTDOWN;
else
rc = ohci_rh_resume (ohci);
@@ -314,49 +334,6 @@ static int ohci_bus_resume (struct usb_hcd *hcd)
return rc;
}
-/* Carry out the final steps of resuming the controller device */
-static void ohci_finish_controller_resume(struct usb_hcd *hcd)
-{
- struct ohci_hcd *ohci = hcd_to_ohci(hcd);
- int port;
- bool need_reinit = false;
-
- /* See if the controller is already running or has been reset */
- ohci->hc_control = ohci_readl(ohci, &ohci->regs->control);
- if (ohci->hc_control & (OHCI_CTRL_IR | OHCI_SCHED_ENABLES)) {
- need_reinit = true;
- } else {
- switch (ohci->hc_control & OHCI_CTRL_HCFS) {
- case OHCI_USB_OPER:
- case OHCI_USB_RESET:
- need_reinit = true;
- }
- }
-
- /* If needed, reinitialize and suspend the root hub */
- if (need_reinit) {
- spin_lock_irq(&ohci->lock);
- hcd->state = HC_STATE_RESUMING;
- ohci_rh_resume(ohci);
- hcd->state = HC_STATE_QUIESCING;
- ohci_rh_suspend(ohci, 0);
- hcd->state = HC_STATE_SUSPENDED;
- spin_unlock_irq(&ohci->lock);
- }
-
- /* Normally just turn on port power and enable interrupts */
- else {
- ohci_dbg(ohci, "powerup ports\n");
- for (port = 0; port < ohci->num_ports; port++)
- ohci_writel(ohci, RH_PS_PPS,
- &ohci->regs->roothub.portstatus[port]);
-
- ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrenable);
- ohci_readl(ohci, &ohci->regs->intrenable);
- msleep(20);
- }
-}
-
/* 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)
@@ -364,7 +341,7 @@ static int ohci_root_hub_state_changes(struct ohci_hcd *ohci, int changed,
int poll_rh = 1;
int rhsc_enable;
- /* Some broken controllers never turn off RHCS in the interrupt
+ /* 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.
*/
@@ -479,8 +456,7 @@ static int ohci_root_hub_state_changes(struct ohci_hcd *ohci, int changed,
/* build "status change" packet (one or two bytes) from HC registers */
-static int
-ohci_hub_status_data (struct usb_hcd *hcd, char *buf)
+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;
@@ -489,7 +465,7 @@ ohci_hub_status_data (struct usb_hcd *hcd, char *buf)
unsigned long flags;
spin_lock_irqsave (&ohci->lock, flags);
- if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))
+ if (!HCD_HW_ACCESSIBLE(hcd))
goto done;
/* undocumented erratum seen on at least rev D */
@@ -533,14 +509,19 @@ ohci_hub_status_data (struct usb_hcd *hcd, char *buf)
}
}
- hcd->poll_rh = ohci_root_hub_state_changes(ohci, changed,
- any_connected, rhsc_status);
+ 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);
/*-------------------------------------------------------------------------*/
@@ -569,17 +550,18 @@ ohci_hub_descriptor (
temp |= 0x0010;
else if (rh & RH_A_OCPM) /* per-port overcurrent reporting? */
temp |= 0x0008;
- desc->wHubCharacteristics = (__force __u16)cpu_to_hc16(ohci, temp);
+ desc->wHubCharacteristics = cpu_to_le16(temp);
- /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
+ /* ports removable, and usb 1.0 legacy PortPwrCtrlMask */
rh = roothub_b (ohci);
- memset(desc->bitmap, 0xff, sizeof(desc->bitmap));
- desc->bitmap [0] = rh & RH_B_DR;
+ 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->bitmap [1] = (rh & RH_B_DR) >> 8;
- desc->bitmap [2] = 0xff;
+ desc->u.hs.DeviceRemovable[1] = (rh & RH_B_DR) >> 8;
+ desc->u.hs.DeviceRemovable[2] = 0xff;
} else
- desc->bitmap [1] = 0xff;
+ desc->u.hs.DeviceRemovable[1] = 0xff;
}
/*-------------------------------------------------------------------------*/
@@ -616,14 +598,8 @@ static int ohci_start_port_reset (struct usb_hcd *hcd, unsigned port)
/* See usb 7.1.7.5: root hubs must issue at least 50 msec reset signaling,
* not necessarily continuous ... to guard against resume signaling.
- * The short timeout is safe for non-root hubs, and is backward-compatible
- * with earlier Linux hosts.
*/
-#ifdef CONFIG_USB_SUSPEND
#define PORT_RESET_MSEC 50
-#else
-#define PORT_RESET_MSEC 10
-#endif
/* this timer value might be vendor-specific ... */
#define PORT_RESET_HW_MSEC 10
@@ -688,7 +664,7 @@ static inline int root_port_reset (struct ohci_hcd *ohci, unsigned port)
return 0;
}
-static int ohci_hub_control (
+int ohci_hub_control(
struct usb_hcd *hcd,
u16 typeReq,
u16 wValue,
@@ -697,11 +673,11 @@ static int ohci_hub_control (
u16 wLength
) {
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
- int ports = hcd_to_bus (hcd)->root_hub->maxchild;
+ int ports = ohci->num_ports;
u32 temp;
int retval = 0;
- if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
+ if (unlikely(!HCD_HW_ACCESSIBLE(hcd)))
return -ESHUTDOWN;
switch (typeReq) {
@@ -767,10 +743,8 @@ static int ohci_hub_control (
temp = roothub_portstatus (ohci, wIndex);
put_unaligned_le32(temp, buf);
-#ifndef OHCI_VERBOSE_DEBUG
- if (*(u16*)(buf+2)) /* only if wPortChange is interesting */
-#endif
- dbg_port (ohci, "GetStatus", wIndex, temp);
+ if (*(u16*)(buf+2)) /* only if wPortChange is interesting */
+ dbg_port(ohci, "GetStatus", wIndex, temp);
break;
case SetHubFeature:
switch (wValue) {
@@ -816,4 +790,4 @@ error:
}
return retval;
}
-
+EXPORT_SYMBOL_GPL(ohci_hub_control);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 08:51:37 +0000