diff options
Diffstat (limited to 'drivers/usb/dwc3')
| -rw-r--r-- | drivers/usb/dwc3/dwc3-msm.c | 54 |
1 files changed, 50 insertions, 4 deletions
diff --git a/drivers/usb/dwc3/dwc3-msm.c b/drivers/usb/dwc3/dwc3-msm.c index 5ad68df298cd..010331bb80a5 100644 --- a/drivers/usb/dwc3/dwc3-msm.c +++ b/drivers/usb/dwc3/dwc3-msm.c @@ -58,7 +58,7 @@ /* time out to wait for USB cable status notification (in ms)*/ #define SM_INIT_TIMEOUT 30000 - +#define DWC3_WAKEUP_SRC_TIMEOUT 5000 /* AHB2PHY register offsets */ #define PERIPH_SS_AHB2PHY_TOP_CFG 0x10 @@ -216,6 +216,7 @@ struct dwc3_msm { struct notifier_block usbdev_nb; bool hc_died; bool xhci_ss_compliance_enable; + bool no_wakeup_src_in_hostmode; struct extcon_dev *extcon_vbus; struct extcon_dev *extcon_id; @@ -2338,6 +2339,7 @@ static void dwc3_ext_event_notify(struct dwc3_msm *mdwc) clear_bit(B_SUSPEND, &mdwc->inputs); } + pm_stay_awake(mdwc->dev); schedule_delayed_work(&mdwc->sm_work, 0); } @@ -2626,6 +2628,7 @@ static int dwc3_msm_id_notifier(struct notifier_block *nb, if (mdwc->id_state != id) { mdwc->id_state = id; dbg_event(0xFF, "id_state", mdwc->id_state); + pm_stay_awake(mdwc->dev); queue_work(mdwc->dwc3_wq, &mdwc->resume_work); } @@ -2688,6 +2691,7 @@ static int dwc3_msm_vbus_notifier(struct notifier_block *nb, mdwc->vbus_active = event; if (dwc->is_drd && !mdwc->in_restart) { dbg_event(0xFF, "Q RW (vbus)", mdwc->vbus_active); + pm_stay_awake(mdwc->dev); queue_work(mdwc->dwc3_wq, &mdwc->resume_work); } done: @@ -3087,6 +3091,11 @@ static int dwc3_msm_probe(struct platform_device *pdev) mdwc->disable_host_mode_pm = of_property_read_bool(node, "qcom,disable-host-mode-pm"); + mdwc->no_wakeup_src_in_hostmode = of_property_read_bool(node, + "qcom,no-wakeup-src-in-hostmode"); + if (mdwc->no_wakeup_src_in_hostmode) + dev_dbg(&pdev->dev, "dwc3 host not using wakeup source\n"); + dwc3_set_notifier(&dwc3_msm_notify_event); /* Assumes dwc3 is the first DT child of dwc3-msm */ @@ -3879,12 +3888,14 @@ static void dwc3_otg_sm_work(struct work_struct *w) mdwc->otg_state = OTG_STATE_A_IDLE; goto ret; } + pm_wakeup_event(mdwc->dev, DWC3_WAKEUP_SRC_TIMEOUT); } break; case OTG_STATE_A_HOST: if (test_bit(ID, &mdwc->inputs) || mdwc->hc_died) { - dev_dbg(mdwc->dev, "id || hc_died\n"); + dbg_event(0xFF, "id || hc_died", 0); + dev_dbg(mdwc->dev, "%s state id || hc_died\n", state); dwc3_otg_start_host(mdwc, 0); mdwc->otg_state = OTG_STATE_B_IDLE; mdwc->vbus_retry_count = 0; @@ -3895,6 +3906,7 @@ static void dwc3_otg_sm_work(struct work_struct *w) dbg_event(0xFF, "XHCIResume", 0); if (dwc) pm_runtime_resume(&dwc->xhci->dev); + pm_wakeup_event(mdwc->dev, DWC3_WAKEUP_SRC_TIMEOUT); } break; @@ -3910,6 +3922,34 @@ ret: return; } +static int dwc3_msm_pm_prepare(struct device *dev) +{ + struct dwc3_msm *mdwc = dev_get_drvdata(dev); + struct dwc3 *dwc = platform_get_drvdata(mdwc->dwc3); + struct usb_hcd *hcd; + struct xhci_hcd *xhci; + + dev_dbg(dev, "dwc3-msm PM prepare,lpm:%u\n", atomic_read(&dwc->in_lpm)); + dbg_event(0xFF, "PM Prep", 0); + if (!mdwc->in_host_mode || !mdwc->no_wakeup_src_in_hostmode) + return 0; + + hcd = dev_get_drvdata(&dwc->xhci->dev); + xhci = hcd_to_xhci(hcd); + flush_delayed_work(&mdwc->sm_work); + + /* If in lpm then prevent usb core to runtime_resume from pm_suspend */ + if (atomic_read(&dwc->in_lpm)) { + hcd_to_bus(hcd)->skip_resume = true; + hcd_to_bus(xhci->shared_hcd)->skip_resume = true; + } else { + hcd_to_bus(hcd)->skip_resume = false; + hcd_to_bus(xhci->shared_hcd)->skip_resume = false; + } + + return 0; +} + #ifdef CONFIG_PM_SLEEP static int dwc3_msm_pm_suspend(struct device *dev) { @@ -3921,7 +3961,7 @@ static int dwc3_msm_pm_suspend(struct device *dev) dbg_event(0xFF, "PM Sus", 0); flush_workqueue(mdwc->dwc3_wq); - if (!atomic_read(&dwc->in_lpm)) { + if (!atomic_read(&dwc->in_lpm) && !mdwc->no_wakeup_src_in_hostmode) { dev_err(mdwc->dev, "Abort PM suspend!! (USB is outside LPM)\n"); return -EBUSY; } @@ -3945,8 +3985,13 @@ static int dwc3_msm_pm_resume(struct device *dev) flush_workqueue(mdwc->dwc3_wq); atomic_set(&mdwc->pm_suspended, 0); + /* Resume h/w in host mode as it may not be runtime suspended */ + if (mdwc->no_wakeup_src_in_hostmode && !test_bit(ID, &mdwc->inputs)) + dwc3_msm_resume(mdwc); + /* kick in otg state machine */ - queue_work(mdwc->dwc3_wq, &mdwc->resume_work); + if (mdwc->vbus_active || !mdwc->id_state) + queue_work(mdwc->dwc3_wq, &mdwc->resume_work); return 0; } @@ -3983,6 +4028,7 @@ static int dwc3_msm_runtime_resume(struct device *dev) #endif static const struct dev_pm_ops dwc3_msm_dev_pm_ops = { + .prepare = dwc3_msm_pm_prepare, SET_SYSTEM_SLEEP_PM_OPS(dwc3_msm_pm_suspend, dwc3_msm_pm_resume) SET_RUNTIME_PM_OPS(dwc3_msm_runtime_suspend, dwc3_msm_runtime_resume, dwc3_msm_runtime_idle) |