static int ohci_bus_suspend (struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
int status = 0;
unsigned long flags;
spin_lock_irqsave (&ohci->lock, flags);
if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) {
spin_unlock_irqrestore (&ohci->lock, flags);
return -ESHUTDOWN;
}
ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
switch (ohci->hc_control & OHCI_CTRL_HCFS) {
case OHCI_USB_RESUME:
ohci_dbg (ohci, "resume/suspend?\n");
ohci->hc_control &= ~OHCI_CTRL_HCFS;
ohci->hc_control |= OHCI_USB_RESET;
ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
(void) ohci_readl (ohci, &ohci->regs->control);
/* FALL THROUGH */
case OHCI_USB_RESET:
status = -EBUSY;
ohci_dbg (ohci, "needs reinit!\n");
goto done;
case OHCI_USB_SUSPEND:
ohci_dbg (ohci, "already suspended\n");
goto done;
}
ohci_dbg (ohci, "suspend root hub\n");
/* First stop any processing */
if (ohci->hc_control & OHCI_SCHED_ENABLES) {
int limit;
ohci->hc_control &= ~OHCI_SCHED_ENABLES;
ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
ohci_writel (ohci, OHCI_INTR_SF, &ohci->regs->intrstatus);
/* sched disables take effect on the next frame,
* then the last WDH could take 6+ msec
*/
ohci_dbg (ohci, "stopping schedules ...\n");
limit = 2000;
while (limit > 0) {
udelay (250);
limit =- 250;
if (ohci_readl (ohci, &ohci->regs->intrstatus)
& OHCI_INTR_SF)
break;
}
dl_done_list (ohci, NULL);
mdelay (7);
}
dl_done_list (ohci, NULL);
finish_unlinks (ohci, ohci_frame_no(ohci), NULL);
ohci_writel (ohci, ohci_readl (ohci, &ohci->regs->intrstatus),
&ohci->regs->intrstatus);
/* maybe resume can wake root hub */
if (device_may_wakeup(&ohci_to_hcd(ohci)->self.root_hub->dev))
ohci->hc_control |= OHCI_CTRL_RWE;
else
ohci->hc_control &= ~OHCI_CTRL_RWE;
/* Suspend hub ... this is the "global (to this bus) suspend" mode,
* which doesn't imply ports will first be individually suspended.
*/
ohci->hc_control &= ~OHCI_CTRL_HCFS;
ohci->hc_control |= OHCI_USB_SUSPEND;
ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
(void) ohci_readl (ohci, &ohci->regs->control);
/* no resumes until devices finish suspending */
ohci->next_statechange = jiffies + msecs_to_jiffies (5);
/* no timer polling */
hcd->poll_rh = 0;
done:
/* external suspend vs self autosuspend ... same effect */
if (status == 0)
usb_hcd_suspend_root_hub(hcd);
spin_unlock_irqrestore (&ohci->lock, flags);
return status;
}
static int ohci_hub_suspend (struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
int status = 0;
unsigned long flags;
#ifndef USB_FREE_IRQ_AT_SUSPEND_MODE
#if defined(CONFIG_REALTEK_VENUS_USB_1261) || defined(CONFIG_REALTEK_VENUS_USB_1261_ECO)
return 0;
#endif /* defined(CONFIG_REALTEK_VENUS_USB_1261) || defined(CONFIG_REALTEK_VENUS_USB_1261_ECO) */
#endif /* USB_FREE_IRQ_AT_SUSPEND_MODE */
spin_lock_irqsave (&ohci->lock, flags);
ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
switch (ohci->hc_control & OHCI_CTRL_HCFS) {
case OHCI_USB_RESUME:
ohci_dbg (ohci, "resume/suspend?\n");
ohci->hc_control &= ~OHCI_CTRL_HCFS;
ohci->hc_control |= OHCI_USB_RESET;
ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
(void) ohci_readl (ohci, &ohci->regs->control);
/* FALL THROUGH */
case OHCI_USB_RESET:
status = -EBUSY;
ohci_dbg (ohci, "needs reinit!\n");
goto done;
case OHCI_USB_SUSPEND:
ohci_dbg (ohci, "already suspended\n");
goto done;
}
ohci_dbg (ohci, "suspend root hub\n");
/* First stop any processing */
hcd->state = HC_STATE_QUIESCING;
if (ohci->hc_control & OHCI_SCHED_ENABLES) {
int limit;
ohci->hc_control &= ~OHCI_SCHED_ENABLES;
ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
ohci_writel (ohci, OHCI_INTR_SF, &ohci->regs->intrstatus);
/* sched disables take effect on the next frame,
* then the last WDH could take 6+ msec
*/
ohci_dbg (ohci, "stopping schedules ...\n");
limit = 2000;
while (limit > 0) {
udelay (250);
limit =- 250;
if (ohci_readl (ohci, &ohci->regs->intrstatus)
& OHCI_INTR_SF)
break;
}
dl_done_list (ohci, NULL);
mdelay (7);
}
dl_done_list (ohci, NULL);
finish_unlinks (ohci, ohci_frame_no(ohci), NULL);
ohci_writel (ohci, ohci_readl (ohci, &ohci->regs->intrstatus),
&ohci->regs->intrstatus);
/* maybe resume can wake root hub */
if (hcd->remote_wakeup)
ohci->hc_control |= OHCI_CTRL_RWE;
else
ohci->hc_control &= ~OHCI_CTRL_RWE;
/* Suspend hub */
ohci->hc_control &= ~OHCI_CTRL_HCFS;
ohci->hc_control |= OHCI_USB_SUSPEND;
ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
(void) ohci_readl (ohci, &ohci->regs->control);
/* no resumes until devices finish suspending */
ohci->next_statechange = jiffies + msecs_to_jiffies (5);
done:
if (status == 0)
hcd->state = HC_STATE_SUSPENDED;
spin_unlock_irqrestore (&ohci->lock, flags);
return status;
}
static void admhc_endpoint_disable(struct usb_hcd *hcd,
struct usb_host_endpoint *ep)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
unsigned long flags;
struct ed *ed = ep->hcpriv;
unsigned limit = 1000;
/* ASSERT: any requests/urbs are being unlinked */
/* ASSERT: nobody can be submitting urbs for this any more */
if (!ed)
return;
#ifdef ADMHC_VERBOSE_DEBUG
spin_lock_irqsave(&ahcd->lock, flags);
admhc_dump_ed(ahcd, "EP-DISABLE", ed, 1);
spin_unlock_irqrestore(&ahcd->lock, flags);
#endif
rescan:
spin_lock_irqsave(&ahcd->lock, flags);
if (!HC_IS_RUNNING(hcd->state)) {
sanitize:
ed->state = ED_IDLE;
finish_unlinks(ahcd, 0);
}
switch (ed->state) {
case ED_UNLINK: /* wait for hw to finish? */
/* major IRQ delivery trouble loses INTR_SOFI too... */
if (limit-- == 0) {
admhc_warn(ahcd, "IRQ INTR_SOFI lossage\n");
goto sanitize;
}
spin_unlock_irqrestore(&ahcd->lock, flags);
schedule_timeout_uninterruptible(1);
goto rescan;
case ED_IDLE: /* fully unlinked */
if (list_empty(&ed->td_list)) {
td_free (ahcd, ed->dummy);
ed_free (ahcd, ed);
break;
}
/* else FALL THROUGH */
default:
/* caller was supposed to have unlinked any requests;
* that's not our job. can't recover; must leak ed.
*/
admhc_err(ahcd, "leak ed %p (#%02x) state %d%s\n",
ed, ep->desc.bEndpointAddress, ed->state,
list_empty(&ed->td_list) ? "" : " (has tds)");
td_free(ahcd, ed->dummy);
break;
}
ep->hcpriv = NULL;
spin_unlock_irqrestore(&ahcd->lock, flags);
return;
}
static irqreturn_t admhc_irq(struct usb_hcd *hcd)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
struct admhcd_regs __iomem *regs = ahcd->regs;
u32 ints;
ints = admhc_readl(ahcd, ®s->int_status);
if ((ints & ADMHC_INTR_INTA) == 0) {
/* no unmasked interrupt status is set */
return IRQ_NONE;
}
ints &= admhc_readl(ahcd, ®s->int_enable);
if (ints & ADMHC_INTR_FATI) {
/* e.g. due to PCI Master/Target Abort */
admhc_disable(ahcd);
admhc_err(ahcd, "Fatal Error, controller disabled\n");
admhc_dump(ahcd, 1);
admhc_usb_reset(ahcd);
}
if (ints & ADMHC_INTR_BABI) {
admhc_intr_disable(ahcd, ADMHC_INTR_BABI);
admhc_intr_ack(ahcd, ADMHC_INTR_BABI);
admhc_err(ahcd, "Babble Detected\n");
}
if (ints & ADMHC_INTR_INSM) {
admhc_vdbg(ahcd, "Root Hub Status Change\n");
ahcd->next_statechange = jiffies + STATECHANGE_DELAY;
admhc_intr_ack(ahcd, ADMHC_INTR_RESI | ADMHC_INTR_INSM);
/* NOTE: Vendors didn't always make the same implementation
* choices for RHSC. Many followed the spec; RHSC triggers
* on an edge, like setting and maybe clearing a port status
* change bit. With others it's level-triggered, active
* until khubd clears all the port status change bits. We'll
* always disable it here and rely on polling until khubd
* re-enables it.
*/
admhc_intr_disable(ahcd, ADMHC_INTR_INSM);
usb_hcd_poll_rh_status(hcd);
} else if (ints & ADMHC_INTR_RESI) {
/* For connect and disconnect events, we expect the controller
* to turn on RHSC along with RD. But for remote wakeup events
* this might not happen.
*/
admhc_vdbg(ahcd, "Resume Detect\n");
admhc_intr_ack(ahcd, ADMHC_INTR_RESI);
hcd->poll_rh = 1;
if (ahcd->autostop) {
spin_lock(&ahcd->lock);
admhc_rh_resume(ahcd);
spin_unlock(&ahcd->lock);
} else
usb_hcd_resume_root_hub(hcd);
}
if (ints & ADMHC_INTR_TDC) {
admhc_vdbg(ahcd, "Transfer Descriptor Complete\n");
admhc_intr_ack(ahcd, ADMHC_INTR_TDC);
if (HC_IS_RUNNING(hcd->state))
admhc_intr_disable(ahcd, ADMHC_INTR_TDC);
spin_lock(&ahcd->lock);
admhc_td_complete(ahcd);
spin_unlock(&ahcd->lock);
if (HC_IS_RUNNING(hcd->state))
admhc_intr_enable(ahcd, ADMHC_INTR_TDC);
}
if (ints & ADMHC_INTR_SO) {
/* could track INTR_SO to reduce available PCI/... bandwidth */
admhc_vdbg(ahcd, "Schedule Overrun\n");
}
#if 1
spin_lock(&ahcd->lock);
if (ahcd->ed_rm_list)
finish_unlinks(ahcd, admhc_frame_no(ahcd));
if ((ints & ADMHC_INTR_SOFI) != 0 && !ahcd->ed_rm_list
&& HC_IS_RUNNING(hcd->state))
admhc_intr_disable(ahcd, ADMHC_INTR_SOFI);
spin_unlock(&ahcd->lock);
#else
if (ints & ADMHC_INTR_SOFI) {
admhc_vdbg(ahcd, "Start Of Frame\n");
spin_lock(&ahcd->lock);
/* handle any pending ED removes */
finish_unlinks(ahcd, admhc_frameno(ahcd));
/* leaving INTR_SOFI enabled when there's still unlinking
* to be done in the (next frame).
*/
if ((ahcd->ed_rm_list == NULL) ||
HC_IS_RUNNING(hcd->state) == 0)
/*
* disable INTR_SOFI if there are no unlinking to be
* done (in the next frame)
*/
admhc_intr_disable(ahcd, ADMHC_INTR_SOFI);
spin_unlock(&ahcd->lock);
}
#endif
if (HC_IS_RUNNING(hcd->state)) {
admhc_intr_ack(ahcd, ints);
admhc_intr_enable(ahcd, ADMHC_INTR_MIE);
admhc_writel_flush(ahcd);
}
return IRQ_HANDLED;
}
static int ohci_hub_suspend (struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
struct usb_device *root = hcd_to_bus (&ohci->hcd)->root_hub;
int status = 0;
if (root->dev.power.power_state != 0)
return 0;
if (time_before (jiffies, ohci->next_statechange))
return -EAGAIN;
spin_lock_irq (&ohci->lock);
ohci->hc_control = ohci_readl (&ohci->regs->control);
switch (ohci->hc_control & OHCI_CTRL_HCFS) {
case OHCI_USB_RESUME:
ohci_dbg (ohci, "resume/suspend?\n");
ohci->hc_control &= ~OHCI_CTRL_HCFS;
ohci->hc_control |= OHCI_USB_RESET;
writel (ohci->hc_control, &ohci->regs->control);
(void) ohci_readl (&ohci->regs->control);
/* FALL THROUGH */
case OHCI_USB_RESET:
status = -EBUSY;
ohci_dbg (ohci, "needs reinit!\n");
goto done;
case OHCI_USB_SUSPEND:
ohci_dbg (ohci, "already suspended?\n");
goto succeed;
}
ohci_dbg (ohci, "suspend root hub\n");
/* First stop any processing */
ohci->hcd.state = USB_STATE_QUIESCING;
if (ohci->hc_control & OHCI_SCHED_ENABLES) {
int limit;
ohci->hc_control &= ~OHCI_SCHED_ENABLES;
writel (ohci->hc_control, &ohci->regs->control);
ohci->hc_control = ohci_readl (&ohci->regs->control);
writel (OHCI_INTR_SF, &ohci->regs->intrstatus);
/* sched disables take effect on the next frame,
* then the last WDH could take 6+ msec
*/
ohci_dbg (ohci, "stopping schedules ...\n");
limit = 2000;
while (limit > 0) {
udelay (250);
limit =- 250;
if (ohci_readl (&ohci->regs->intrstatus) & OHCI_INTR_SF)
break;
}
dl_done_list (ohci, NULL);
mdelay (7);
}
dl_done_list (ohci, NULL);
finish_unlinks (ohci, OHCI_FRAME_NO(ohci->hcca), NULL);
writel (ohci_readl (&ohci->regs->intrstatus), &ohci->regs->intrstatus);
/* maybe resume can wake root hub */
if (ohci->hcd.remote_wakeup)
ohci->hc_control |= OHCI_CTRL_RWE;
else
ohci->hc_control &= ~OHCI_CTRL_RWE;
/* Suspend hub */
ohci->hc_control &= ~OHCI_CTRL_HCFS;
ohci->hc_control |= OHCI_USB_SUSPEND;
writel (ohci->hc_control, &ohci->regs->control);
(void) ohci_readl (&ohci->regs->control);
/* no resumes until devices finish suspending */
ohci->next_statechange = jiffies + msecs_to_jiffies (5);
succeed:
/* it's not USB_STATE_SUSPENDED unless access to this
* hub from the non-usb side (PCI, SOC, etc) stopped
*/
root->dev.power.power_state = 3;
done:
spin_unlock_irq (&ohci->lock);
return status;
}
