diff options
Diffstat (limited to 'drivers/usb/cdns3/core.c')
-rw-r--r-- | drivers/usb/cdns3/core.c | 153 |
1 files changed, 136 insertions, 17 deletions
diff --git a/drivers/usb/cdns3/core.c b/drivers/usb/cdns3/core.c index e56dbb6a898c..4cf815882c5f 100644 --- a/drivers/usb/cdns3/core.c +++ b/drivers/usb/cdns3/core.c @@ -393,6 +393,29 @@ static void set_phy_power_off(struct cdns3 *cdns) } /** + * cdns3_wakeup_irq - interrupt handler for wakeup events + * @irq: irq number for cdns3 core device + * @data: structure of cdns3 + * + * Returns IRQ_HANDLED or IRQ_NONE + */ +static irqreturn_t cdns3_wakeup_irq(int irq, void *data) +{ + struct cdns3 *cdns = data; + + if (cdns->in_lpm) { + disable_irq_nosync(irq); + cdns->wakeup_pending = true; + if ((cdns->role == USB_ROLE_HOST) && cdns->host_dev) + pm_request_resume(&cdns->host_dev->dev); + + return IRQ_HANDLED; + } + + return IRQ_NONE; +} + +/** * cdns3_probe - probe for cdns3 core device * @pdev: Pointer to cdns3 core platform device * @@ -418,6 +441,7 @@ static int cdns3_probe(struct platform_device *pdev) return -ENOMEM; cdns->dev = dev; + cdns->pdata = dev_get_platdata(dev); platform_set_drvdata(pdev, cdns); @@ -466,6 +490,17 @@ static int cdns3_probe(struct platform_device *pdev) cdns->otg_res = *res; + cdns->wakeup_irq = platform_get_irq_byname_optional(pdev, "wakeup"); + if (cdns->wakeup_irq == -EPROBE_DEFER) + return cdns->wakeup_irq; + else if (cdns->wakeup_irq == 0) + return -EINVAL; + + if (cdns->wakeup_irq < 0) { + dev_dbg(dev, "couldn't get wakeup irq\n"); + cdns->wakeup_irq = 0x0; + } + mutex_init(&cdns->mutex); cdns->usb2_phy = devm_phy_optional_get(dev, "cdns3,usb2-phy"); @@ -502,6 +537,18 @@ static int cdns3_probe(struct platform_device *pdev) goto err3; } + if (cdns->wakeup_irq) { + ret = devm_request_irq(cdns->dev, cdns->wakeup_irq, + cdns3_wakeup_irq, + IRQF_SHARED, + dev_name(cdns->dev), cdns); + + if (ret) { + dev_err(cdns->dev, "couldn't register wakeup irq handler\n"); + goto err3; + } + } + ret = cdns3_drd_init(cdns); if (ret) goto err4; @@ -510,9 +557,11 @@ static int cdns3_probe(struct platform_device *pdev) if (ret) goto err4; + spin_lock_init(&cdns->lock); device_set_wakeup_capable(dev, true); pm_runtime_set_active(dev); pm_runtime_enable(dev); + pm_runtime_forbid(dev); /* * The controller needs less time between bus and controller suspend, @@ -559,52 +608,122 @@ static int cdns3_remove(struct platform_device *pdev) return 0; } -#ifdef CONFIG_PM_SLEEP +#ifdef CONFIG_PM -static int cdns3_suspend(struct device *dev) +static int cdns3_set_platform_suspend(struct device *dev, + bool suspend, bool wakeup) +{ + struct cdns3 *cdns = dev_get_drvdata(dev); + int ret = 0; + + if (cdns->pdata && cdns->pdata->platform_suspend) + ret = cdns->pdata->platform_suspend(dev, suspend, wakeup); + + return ret; +} + +static int cdns3_controller_suspend(struct device *dev, pm_message_t msg) { struct cdns3 *cdns = dev_get_drvdata(dev); + bool wakeup; unsigned long flags; - if (cdns->role == USB_ROLE_HOST) + if (cdns->in_lpm) return 0; - if (pm_runtime_status_suspended(dev)) - pm_runtime_resume(dev); + if (PMSG_IS_AUTO(msg)) + wakeup = true; + else + wakeup = device_may_wakeup(dev); - if (cdns->roles[cdns->role]->suspend) { - spin_lock_irqsave(&cdns->gadget_dev->lock, flags); - cdns->roles[cdns->role]->suspend(cdns, false); - spin_unlock_irqrestore(&cdns->gadget_dev->lock, flags); - } + cdns3_set_platform_suspend(cdns->dev, true, wakeup); + set_phy_power_off(cdns); + spin_lock_irqsave(&cdns->lock, flags); + cdns->in_lpm = true; + spin_unlock_irqrestore(&cdns->lock, flags); + dev_dbg(cdns->dev, "%s ends\n", __func__); return 0; } -static int cdns3_resume(struct device *dev) +static int cdns3_controller_resume(struct device *dev, pm_message_t msg) { struct cdns3 *cdns = dev_get_drvdata(dev); + int ret; unsigned long flags; - if (cdns->role == USB_ROLE_HOST) + if (!cdns->in_lpm) return 0; - if (cdns->roles[cdns->role]->resume) { - spin_lock_irqsave(&cdns->gadget_dev->lock, flags); + ret = set_phy_power_on(cdns); + if (ret) + return ret; + + cdns3_set_platform_suspend(cdns->dev, false, false); + + spin_lock_irqsave(&cdns->lock, flags); + if (cdns->roles[cdns->role]->resume && !PMSG_IS_AUTO(msg)) cdns->roles[cdns->role]->resume(cdns, false); - spin_unlock_irqrestore(&cdns->gadget_dev->lock, flags); + + cdns->in_lpm = false; + spin_unlock_irqrestore(&cdns->lock, flags); + if (cdns->wakeup_pending) { + cdns->wakeup_pending = false; + enable_irq(cdns->wakeup_irq); + } + dev_dbg(cdns->dev, "%s ends\n", __func__); + + return ret; +} + +static int cdns3_runtime_suspend(struct device *dev) +{ + return cdns3_controller_suspend(dev, PMSG_AUTO_SUSPEND); +} + +static int cdns3_runtime_resume(struct device *dev) +{ + return cdns3_controller_resume(dev, PMSG_AUTO_RESUME); +} +#ifdef CONFIG_PM_SLEEP + +static int cdns3_suspend(struct device *dev) +{ + struct cdns3 *cdns = dev_get_drvdata(dev); + unsigned long flags; + + if (pm_runtime_status_suspended(dev)) + pm_runtime_resume(dev); + + if (cdns->roles[cdns->role]->suspend) { + spin_lock_irqsave(&cdns->lock, flags); + cdns->roles[cdns->role]->suspend(cdns, false); + spin_unlock_irqrestore(&cdns->lock, flags); } + return cdns3_controller_suspend(dev, PMSG_SUSPEND); +} + +static int cdns3_resume(struct device *dev) +{ + int ret; + + ret = cdns3_controller_resume(dev, PMSG_RESUME); + if (ret) + return ret; + pm_runtime_disable(dev); pm_runtime_set_active(dev); pm_runtime_enable(dev); - return 0; + return ret; } -#endif +#endif /* CONFIG_PM_SLEEP */ +#endif /* CONFIG_PM */ static const struct dev_pm_ops cdns3_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(cdns3_suspend, cdns3_resume) + SET_RUNTIME_PM_OPS(cdns3_runtime_suspend, cdns3_runtime_resume, NULL) }; #ifdef CONFIG_OF |