-#define OHCI_SCHED_ENABLES \
- (OHCI_CTRL_CLE|OHCI_CTRL_BLE|OHCI_CTRL_PLE|OHCI_CTRL_IE)
-
-#ifdef CONFIG_PM
-static int admhc_restart(struct admhcd *ahcd);
-
-static int admhc_rh_suspend(struct admhcd *ahcd, int autostop)
-__releases(ahcd->lock)
-__acquires(ahcd->lock)
-{
- int status = 0;
-
- ahcd->hc_control = admhc_readl(ahcd, &ahcd->regs->control);
- switch (ahcd->hc_control & OHCI_CTRL_HCFS) {
- case OHCI_USB_RESUME:
- admhc_dbg(ahcd, "resume/suspend?\n");
- ahcd->hc_control &= ~OHCI_CTRL_HCFS;
- ahcd->hc_control |= OHCI_USB_RESET;
- admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control);
- (void) admhc_readl(ahcd, &ahcd->regs->control);
- /* FALL THROUGH */
- case OHCI_USB_RESET:
- status = -EBUSY;
- admhc_dbg(ahcd, "needs reinit!\n");
- goto done;
- case OHCI_USB_SUSPEND:
- if (!ahcd->autostop) {
- admhc_dbg(ahcd, "already suspended\n");
- goto done;
- }
- }
- admhc_dbg(ahcd, "%s root hub\n",
- autostop ? "auto-stop" : "suspend");
-
- /* First stop any processing */
- if (!autostop && (ahcd->hc_control & OHCI_SCHED_ENABLES)) {
- ahcd->hc_control &= ~OHCI_SCHED_ENABLES;
- admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control);
- ahcd->hc_control = admhc_readl(ahcd, &ahcd->regs->control);
- admhc_writel(ahcd, OHCI_INTR_SF, &ahcd->regs->intrstatus);
-
- /* sched disables take effect on the next frame,
- * then the last WDH could take 6+ msec
- */
- admhc_dbg(ahcd, "stopping schedules ...\n");
- ahcd->autostop = 0;
- spin_unlock_irq (&ahcd->lock);
- msleep (8);
- spin_lock_irq (&ahcd->lock);
- }
- dl_done_list (ahcd);
- finish_unlinks (ahcd, admhc_frame_no(ahcd));
-
- /* maybe resume can wake root hub */
- if (device_may_wakeup(&admhcd_to_hcd(ahcd)->self.root_hub->dev) ||
- autostop)
- ahcd->hc_control |= OHCI_CTRL_RWE;
- else {
- admhc_writel(ahcd, OHCI_INTR_RHSC, &ahcd->regs->intrdisable);
- ahcd->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.
- */
- ahcd->hc_control &= ~OHCI_CTRL_HCFS;
- ahcd->hc_control |= OHCI_USB_SUSPEND;
- admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control);
- (void) admhc_readl(ahcd, &ahcd->regs->control);
-
- /* no resumes until devices finish suspending */
- if (!autostop) {
- ahcd->next_statechange = jiffies + msecs_to_jiffies (5);
- ahcd->autostop = 0;
- }
-
-done:
- return status;
-}
-
-static inline struct ed *find_head(struct ed *ed)
-{
- /* for bulk and control lists */
- while (ed->ed_prev)
- ed = ed->ed_prev;
- return ed;
-}
-
-/* caller has locked the root hub */
-static int admhc_rh_resume(struct admhcd *ahcd)
-__releases(ahcd->lock)
-__acquires(ahcd->lock)
-{
- struct usb_hcd *hcd = admhcd_to_hcd (ahcd);
- u32 temp, enables;
- int status = -EINPROGRESS;
- int autostopped = ahcd->autostop;
-
- ahcd->autostop = 0;
- ahcd->hc_control = admhc_readl(ahcd, &ahcd->regs->control);
-
- if (ahcd->hc_control & (OHCI_CTRL_IR | OHCI_SCHED_ENABLES)) {
- /* this can happen after resuming a swsusp snapshot */
- if (hcd->state == HC_STATE_RESUMING) {
- admhc_dbg(ahcd, "BIOS/SMM active, control %03x\n",
- ahcd->hc_control);
- status = -EBUSY;
- /* this happens when pmcore resumes HC then root */
- } else {
- admhc_dbg(ahcd, "duplicate resume\n");
- status = 0;
- }
- } else switch (ahcd->hc_control & OHCI_CTRL_HCFS) {
- case OHCI_USB_SUSPEND:
- ahcd->hc_control &= ~(OHCI_CTRL_HCFS|OHCI_SCHED_ENABLES);
- ahcd->hc_control |= OHCI_USB_RESUME;
- admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control);
- (void) admhc_readl(ahcd, &ahcd->regs->control);
- admhc_dbg(ahcd, "%s root hub\n",
- autostopped ? "auto-start" : "resume");
- break;
- case OHCI_USB_RESUME:
- /* HCFS changes sometime after INTR_RD */
- admhc_dbg(ahcd, "%swakeup root hub\n",
- autostopped ? "auto-" : "");
- break;
- case OHCI_USB_OPER:
- /* this can happen after resuming a swsusp snapshot */
- admhc_dbg(ahcd, "snapshot resume? reinit\n");
- status = -EBUSY;
- break;
- default: /* RESET, we lost power */
- admhc_dbg(ahcd, "lost power\n");
- status = -EBUSY;
- }
- if (status == -EBUSY) {
- if (!autostopped) {
- spin_unlock_irq (&ahcd->lock);
- (void) ahcd_init (ahcd);
- status = admhc_restart (ahcd);
- spin_lock_irq (&ahcd->lock);
- }
- return status;
- }
- if (status != -EINPROGRESS)
- return status;
- if (autostopped)
- goto skip_resume;
- spin_unlock_irq (&ahcd->lock);
-
- /* Some controllers (lucent erratum) need extra-long delays */
- msleep (20 /* usb 11.5.1.10 */ + 12 /* 32 msec counter */ + 1);
-
- temp = admhc_readl(ahcd, &ahcd->regs->control);
- temp &= OHCI_CTRL_HCFS;
- if (temp != OHCI_USB_RESUME) {
- admhc_err (ahcd, "controller won't resume\n");
- spin_lock_irq(&ahcd->lock);
- return -EBUSY;
- }
-
- /* disable old schedule state, reinit from scratch */
- admhc_writel(ahcd, 0, &ahcd->regs->ed_controlhead);
- admhc_writel(ahcd, 0, &ahcd->regs->ed_controlcurrent);
- admhc_writel(ahcd, 0, &ahcd->regs->ed_bulkhead);
- admhc_writel(ahcd, 0, &ahcd->regs->ed_bulkcurrent);
- admhc_writel(ahcd, 0, &ahcd->regs->ed_periodcurrent);
- admhc_writel(ahcd, (u32) ahcd->hcca_dma, &ahcd->ahcd->regs->hcca);
-
- /* Sometimes PCI D3 suspend trashes frame timings ... */
- periodic_reinit(ahcd);
-
- /* the following code is executed with ahcd->lock held and
- * irqs disabled if and only if autostopped is true
- */
-
-skip_resume:
- /* interrupts might have been disabled */
- admhc_writel(ahcd, OHCI_INTR_INIT, &ahcd->regs->int_enable);
- if (ahcd->ed_rm_list)
- admhc_writel(ahcd, OHCI_INTR_SF, &ahcd->regs->int_enable);
-
- /* Then re-enable operations */
- admhc_writel(ahcd, OHCI_USB_OPER, &ahcd->regs->control);
- (void) admhc_readl(ahcd, &ahcd->regs->control);
- if (!autostopped)
- msleep (3);
-
- temp = ahcd->hc_control;
- temp &= OHCI_CTRL_RWC;
- temp |= OHCI_CONTROL_INIT | OHCI_USB_OPER;
- ahcd->hc_control = temp;
- admhc_writel(ahcd, temp, &ahcd->regs->control);
- (void) admhc_readl(ahcd, &ahcd->regs->control);
-
- /* TRSMRCY */
- if (!autostopped) {
- msleep (10);
- spin_lock_irq (&ahcd->lock);
- }
- /* now ahcd->lock is always held and irqs are always disabled */
-
- /* keep it alive for more than ~5x suspend + resume costs */
- ahcd->next_statechange = jiffies + STATECHANGE_DELAY;
-
- /* maybe turn schedules back on */
- enables = 0;
- temp = 0;
- if (!ahcd->ed_rm_list) {
- if (ahcd->ed_controltail) {
- admhc_writel(ahcd,
- find_head (ahcd->ed_controltail)->dma,
- &ahcd->regs->ed_controlhead);
- enables |= OHCI_CTRL_CLE;
- temp |= OHCI_CLF;
- }
- if (ahcd->ed_bulktail) {
- admhc_writel(ahcd, find_head (ahcd->ed_bulktail)->dma,
- &ahcd->regs->ed_bulkhead);
- enables |= OHCI_CTRL_BLE;
- temp |= OHCI_BLF;
- }
- }
- if (hcd->self.bandwidth_isoc_reqs || hcd->self.bandwidth_int_reqs)
- enables |= OHCI_CTRL_PLE|OHCI_CTRL_IE;
- if (enables) {
- admhc_dbg(ahcd, "restarting schedules ... %08x\n", enables);
- ahcd->hc_control |= enables;
- admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control);
- if (temp)
- admhc_writel(ahcd, temp, &ahcd->regs->cmdstatus);
- (void) admhc_readl(ahcd, &ahcd->regs->control);
- }
-
- return 0;
-}
-
-static int admhc_bus_suspend(struct usb_hcd *hcd)
-{
- struct admhcd *ahcd = hcd_to_admhcd(hcd);
- int rc;
-
- spin_lock_irq(&ahcd->lock);
-
- if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
- rc = -ESHUTDOWN;
- else
- rc = admhc_rh_suspend (ahcd, 0);
- spin_unlock_irq(&ahcd->lock);
- return rc;
-}
-
-static int admhc_bus_resume(struct usb_hcd *hcd)
-{
- struct admhcd *ahcd = hcd_to_admhcd(hcd);
- int rc;
-
- if (time_before(jiffies, ahcd->next_statechange))
- msleep(5);
-
- spin_lock_irq (&ahcd->lock);
-
- if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
- rc = -ESHUTDOWN;
- else
- rc = admhc_rh_resume (ahcd);
- spin_unlock_irq(&ahcd->lock);
-
- /* poll until we know a device is connected or we autostop */
- if (rc == 0)
- usb_hcd_poll_rh_status(hcd);
- return rc;
-}
-
-/* Carry out polling-, autostop-, and autoresume-related state changes */
-static int admhc_root_hub_state_changes(struct admhcd *ahcd, int changed,
- int any_connected)
-{
- int poll_rh = 1;
-
- switch (ahcd->hc_control & OHCI_CTRL_HCFS) {
-
- case OHCI_USB_OPER:
- /* keep on polling until we know a device is connected
- * and RHSC is enabled */
- if (!ahcd->autostop) {
- if (any_connected ||
- !device_may_wakeup(&admhcd_to_hcd(ahcd)
- ->self.root_hub->dev)) {
- if (admhc_readl(ahcd, &ahcd->regs->int_enable) &
- OHCI_INTR_RHSC)
- poll_rh = 0;
- } else {
- ahcd->autostop = 1;
- ahcd->next_statechange = jiffies + HZ;
- }
-
- /* if no devices have been attached for one second, autostop */
- } else {
- if (changed || any_connected) {
- ahcd->autostop = 0;
- ahcd->next_statechange = jiffies +
- STATECHANGE_DELAY;
- } else if (time_after_eq(jiffies,
- ahcd->next_statechange)
- && !ahcd->ed_rm_list
- && !(ahcd->hc_control &
- OHCI_SCHED_ENABLES)) {
- ahcd_rh_suspend(ahcd, 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 (ahcd->autostop)
- admhc_rh_resume(ahcd);
- else
- usb_hcd_resume_root_hub(admhcd_to_hcd(ahcd));
- } else {
- /* everything is idle, no need for polling */
- poll_rh = 0;
- }
- break;
- }
- return poll_rh;
-}
-
-#else /* CONFIG_PM */
-
-static inline int admhc_rh_resume(struct admhcd *ahcd)
-{
- return 0;
-}
-
-/* Carry out polling-related state changes.
- * autostop isn't used when CONFIG_PM is turned off.
- */
-static int admhc_root_hub_state_changes(struct admhcd *ahcd, int changed,
- int any_connected)
-{
- int poll_rh = 1;
-
- /* keep on polling until RHSC is enabled */
- if (admhc_readl(ahcd, &ahcd->regs->int_enable) & ADMHC_INTR_INSM)
- poll_rh = 0;
-
- return poll_rh;
-}
-
-#endif /* CONFIG_PM */
-
projects / openwrt.git / blobdiff