int ohci_power(void *ohci, int is_on)
{
struct ohci_hcd *ohcip = (struct ohci_hcd *)ohci;
int port;
int temp;
temp = roothub_a(ohcip);
/* If NoPowerSwitching is true, just return */
if (temp & RH_A_NPS) {
return 0;
}
/* If port switched, switch each port */
if (temp & RH_A_PSM) {
for (port = ohcip->num_ports; port > 0; ) {
(void) ohci_hub_control(ohci_to_hcd(ohcip),
is_on ? SetPortFeature : ClearPortFeature,
USB_PORT_FEAT_POWER,
port--, NULL, 0);
}
}
/* Else use Global Power */
else {
temp = roothub_status(ohcip);
if (is_on) {
temp |= RH_HS_LPSC; /* SetGlobalPower */
}
else {
temp |= RH_HS_LPS; /* ClearGlobalPower */
}
ohci_writel(ohcip, temp, &ohcip->regs->roothub.status);
}
return 0;
}
static 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;
int can_suspend;
unsigned long flags;
can_suspend = device_may_wakeup(&hcd->self.root_hub->dev);
spin_lock_irqsave (&ohci->lock, flags);
/* handle autosuspended root: finish resuming before
* letting khubd or root hub timer see state changes.
*/
if (unlikely((ohci->hc_control & OHCI_CTRL_HCFS) != OHCI_USB_OPER
|| !HC_IS_RUNNING(hcd->state))) {
can_suspend = 0;
goto done;
}
/* undocumented erratum seen on at least rev D */
if ((ohci->flags & OHCI_QUIRK_AMD756)
&& (roothub_a (ohci) & RH_A_NDP) > MAX_ROOT_PORTS) {
ohci_warn (ohci, "bogus NDP, rereads as NDP=%d\n",
ohci_readl (ohci, &ohci->regs->roothub.a) & RH_A_NDP);
/* retry later; "should not happen" */
goto done;
}
/* init status */
if (roothub_status (ohci) & (RH_HS_LPSC | RH_HS_OCIC))
buf [0] = changed = 1;
else
buf [0] = 0;
if (ohci->num_ports > 7) {
buf [1] = 0;
length++;
}
/* look at each port */
for (i = 0; i < ohci->num_ports; i++) {
u32 status = roothub_portstatus (ohci, i);
/* can't autosuspend with active ports */
if ((status & RH_PS_PES) && !(status & RH_PS_PSS))
can_suspend = 0;
if (status & (RH_PS_CSC | RH_PS_PESC | RH_PS_PSSC
| RH_PS_OCIC | RH_PS_PRSC)) {
changed = 1;
if (i < 7)
buf [0] |= 1 << (i + 1);
else
buf [1] |= 1 << (i - 7);
continue;
}
}
/* after root hub changes, stop polling after debouncing
* for a while and maybe kicking in autosuspend
*/
if (changed) {
ohci->next_statechange = jiffies + STATECHANGE_DELAY;
can_suspend = 0;
} else if (time_before (jiffies, ohci->next_statechange)) {
can_suspend = 0;
} else {
#ifdef CONFIG_PM
can_suspend = can_suspend
&& !ohci->ed_rm_list
&& ((OHCI_CTRL_HCFS | OHCI_SCHED_ENABLES)
& ohci->hc_control)
== OHCI_USB_OPER;
#endif
if (hcd->uses_new_polling) {
hcd->poll_rh = 0;
/* use INTR_RHSC iff INTR_RD won't apply */
if (!can_suspend)
ohci_writel (ohci, OHCI_INTR_RHSC,
&ohci->regs->intrenable);
}
}
done:
spin_unlock_irqrestore (&ohci->lock, flags);
#ifdef CONFIG_PM
/* save power by autosuspending idle root hubs;
* INTR_RD wakes us when there's work
*/
if (can_suspend && usb_trylock_device (hcd->self.root_hub) == 0) {
ohci_vdbg (ohci, "autosuspend\n");
(void) ohci_bus_suspend (hcd);
usb_unlock_device (hcd->self.root_hub);
}
#endif
return changed ? length : 0;
}
static int
ohci_hub_status_data (struct usb_hcd *hcd, char *buf)
{
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
int ports, i, changed = 0, length = 1;
int can_suspend = hcd->can_wakeup;
unsigned long flags;
spin_lock_irqsave (&ohci->lock, flags);
// hack by cfyeh for usb suspend/resume
if(usb_ehci_suspend_flag == 1)
{
can_suspend = 0;
goto done;
}
/* handle autosuspended root: finish resuming before
* letting khubd or root hub timer see state changes.
*/
if ((ohci->hc_control & OHCI_CTRL_HCFS) != OHCI_USB_OPER
|| !HC_IS_RUNNING(hcd->state)) {
can_suspend = 0;
goto done;
}
ports = roothub_a (ohci) & RH_A_NDP;
if (ports > MAX_ROOT_PORTS) {
ohci_err (ohci, "bogus NDP=%d, rereads as NDP=%d\n", ports,
ohci_readl (ohci, &ohci->regs->roothub.a) & RH_A_NDP);
/* retry later; "should not happen" */
goto done;
}
/* init status */
if (roothub_status (ohci) & (RH_HS_LPSC | RH_HS_OCIC))
buf [0] = changed = 1;
else
buf [0] = 0;
if (ports > 7) {
buf [1] = 0;
length++;
}
/* look at each port */
for (i = 0; i < ports; i++) {
u32 status = roothub_portstatus (ohci, i);
if (status & (RH_PS_CSC | RH_PS_PESC | RH_PS_PSSC
| RH_PS_OCIC | RH_PS_PRSC)) {
changed = 1;
if (i < 7)
buf [0] |= 1 << (i + 1);
else
buf [1] |= 1 << (i - 7);
continue;
}
/* can suspend if no ports are enabled; or if all all
* enabled ports are suspended AND remote wakeup is on.
*/
if (!(status & RH_PS_CCS))
continue;
if ((status & RH_PS_PSS) && hcd->remote_wakeup)
continue;
can_suspend = 0;
}
done:
spin_unlock_irqrestore (&ohci->lock, flags);
#if defined(CONFIG_PM) || defined(CONFIG_REALTEK_VENUS_USB) //cfyeh+ 2005/11/07
/* save power by suspending idle root hubs;
* INTR_RD wakes us when there's work
* NOTE: if we can do this, we don't need a root hub timer!
*/
if (can_suspend
&& !changed
&& !ohci->ed_rm_list
&& ((OHCI_CTRL_HCFS | OHCI_SCHED_ENABLES)
& ohci->hc_control)
== OHCI_USB_OPER
&& time_after (jiffies, ohci->next_statechange)
&& usb_trylock_device (hcd->self.root_hub)
) {
ohci_vdbg (ohci, "autosuspend\n");
(void) ohci_hub_suspend (hcd);
hcd->state = HC_STATE_RUNNING;
usb_unlock_device (hcd->self.root_hub);
}
#endif
return changed ? length : 0;
}
static 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;
int can_suspend = hcd->can_wakeup;
unsigned long flags;
spin_lock_irqsave (&ohci->lock, flags);
/* handle autosuspended root: finish resuming before
* letting khubd or root hub timer see state changes.
*/
if (unlikely((ohci->hc_control & OHCI_CTRL_HCFS) != OHCI_USB_OPER
|| !HC_IS_RUNNING(hcd->state))) {
can_suspend = 0;
goto done;
}
/* undocumented erratum seen on at least rev D */
if ((ohci->flags & OHCI_QUIRK_AMD756)
&& (roothub_a (ohci) & RH_A_NDP) > MAX_ROOT_PORTS) {
ohci_warn (ohci, "bogus NDP, rereads as NDP=%d\n",
ohci_readl (ohci, &ohci->regs->roothub.a) & RH_A_NDP);
/* retry later; "should not happen" */
goto done;
}
/* init status */
if (roothub_status (ohci) & (RH_HS_LPSC | RH_HS_OCIC))
buf [0] = changed = 1;
else
buf [0] = 0;
if (ohci->num_ports > 7) {
buf [1] = 0;
length++;
}
/* look at each port */
for (i = 0; i < ohci->num_ports; i++) {
u32 status = roothub_portstatus (ohci, i);
if (status & (RH_PS_CSC | RH_PS_PESC | RH_PS_PSSC
| RH_PS_OCIC | RH_PS_PRSC)) {
changed = 1;
if (i < 7)
buf [0] |= 1 << (i + 1);
else
buf [1] |= 1 << (i - 7);
continue;
}
/* can suspend if no ports are enabled; or if all all
* enabled ports are suspended AND remote wakeup is on.
*/
if (!(status & RH_PS_CCS))
continue;
if ((status & RH_PS_PSS) && hcd->remote_wakeup)
continue;
can_suspend = 0;
}
done:
spin_unlock_irqrestore (&ohci->lock, flags);
#ifdef CONFIG_PM
/* save power by suspending idle root hubs;
* INTR_RD wakes us when there's work
*/
if (can_suspend
&& !changed
&& !ohci->ed_rm_list
&& ((OHCI_CTRL_HCFS | OHCI_SCHED_ENABLES)
& ohci->hc_control)
== OHCI_USB_OPER
&& time_after (jiffies, ohci->next_statechange)
&& usb_trylock_device (hcd->self.root_hub) == 0
) {
ohci_vdbg (ohci, "autosuspend\n");
(void) ohci_bus_suspend (hcd);
usb_unlock_device (hcd->self.root_hub);
}
#endif
return changed ? length : 0;
}
static int
ohci_hub_status_data (struct usb_hcd *hcd, char *buf)
{
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
int ports, i, changed = 0, length = 1;
int can_suspend = 1;
ports = roothub_a (ohci) & RH_A_NDP;
if (ports > MAX_ROOT_PORTS) {
if (!HCD_IS_RUNNING(ohci->hcd.state))
return -ESHUTDOWN;
ohci_err (ohci, "bogus NDP=%d, rereads as NDP=%d\n",
ports, ohci_readl (&ohci->regs->roothub.a) & RH_A_NDP);
/* retry later; "should not happen" */
return 0;
}
/* init status */
if (roothub_status (ohci) & (RH_HS_LPSC | RH_HS_OCIC))
buf [0] = changed = 1;
else
buf [0] = 0;
if (ports > 7) {
buf [1] = 0;
length++;
}
/* look at each port */
for (i = 0; i < ports; i++) {
u32 status = roothub_portstatus (ohci, i);
if (status & (RH_PS_CSC | RH_PS_PESC | RH_PS_PSSC
| RH_PS_OCIC | RH_PS_PRSC)) {
changed = 1;
if (i < 7)
buf [0] |= 1 << (i + 1);
else
buf [1] |= 1 << (i - 7);
continue;
}
/* can suspend if no ports are enabled; or if all all
* enabled ports are suspended AND remote wakeup is on.
*/
if (!(status & RH_PS_CCS))
continue;
if ((status & RH_PS_PSS) && ohci->hcd.remote_wakeup)
continue;
can_suspend = 0;
}
#ifdef CONFIG_PM
/* save power by suspending idle root hubs;
* INTR_RD wakes us when there's work
*/
if (can_suspend
&& !changed
&& !ohci->ed_rm_list
&& ((OHCI_CTRL_HCFS | OHCI_SCHED_ENABLES)
& ohci->hc_control)
== OHCI_USB_OPER
&& down_trylock (&hcd->self.root_hub->serialize) == 0
) {
ohci_vdbg (ohci, "autosuspend\n");
(void) ohci_hub_suspend (&ohci->hcd);
ohci->hcd.state = USB_STATE_RUNNING;
up (&hcd->self.root_hub->serialize);
}
#endif
return changed ? length : 0;
}
