diff options
Diffstat (limited to 'drivers/phy/phy-twl4030-usb.c')
| -rw-r--r-- | drivers/phy/phy-twl4030-usb.c | 121 |
1 files changed, 73 insertions, 48 deletions
diff --git a/drivers/phy/phy-twl4030-usb.c b/drivers/phy/phy-twl4030-usb.c index e1a6623d4696..9cd33a4bcfb1 100644 --- a/drivers/phy/phy-twl4030-usb.c +++ b/drivers/phy/phy-twl4030-usb.c @@ -34,6 +34,7 @@ #include <linux/delay.h> #include <linux/usb/otg.h> #include <linux/phy/phy.h> +#include <linux/pm_runtime.h> #include <linux/usb/musb-omap.h> #include <linux/usb/ulpi.h> #include <linux/i2c/twl.h> @@ -422,37 +423,55 @@ static void twl4030_phy_power(struct twl4030_usb *twl, int on) } } -static int twl4030_phy_power_off(struct phy *phy) +static int twl4030_usb_runtime_suspend(struct device *dev) { - struct twl4030_usb *twl = phy_get_drvdata(phy); + struct twl4030_usb *twl = dev_get_drvdata(dev); + dev_dbg(twl->dev, "%s\n", __func__); if (twl->asleep) return 0; twl4030_phy_power(twl, 0); twl->asleep = 1; - dev_dbg(twl->dev, "%s\n", __func__); + return 0; } -static void __twl4030_phy_power_on(struct twl4030_usb *twl) +static int twl4030_usb_runtime_resume(struct device *dev) { + struct twl4030_usb *twl = dev_get_drvdata(dev); + + dev_dbg(twl->dev, "%s\n", __func__); + if (!twl->asleep) + return 0; + twl4030_phy_power(twl, 1); - twl4030_i2c_access(twl, 1); - twl4030_usb_set_mode(twl, twl->usb_mode); - if (twl->usb_mode == T2_USB_MODE_ULPI) - twl4030_i2c_access(twl, 0); + twl->asleep = 0; + + return 0; +} + +static int twl4030_phy_power_off(struct phy *phy) +{ + struct twl4030_usb *twl = phy_get_drvdata(phy); + + dev_dbg(twl->dev, "%s\n", __func__); + pm_runtime_mark_last_busy(twl->dev); + pm_runtime_put_autosuspend(twl->dev); + + return 0; } static int twl4030_phy_power_on(struct phy *phy) { struct twl4030_usb *twl = phy_get_drvdata(phy); - if (!twl->asleep) - return 0; - __twl4030_phy_power_on(twl); - twl->asleep = 0; dev_dbg(twl->dev, "%s\n", __func__); + pm_runtime_get_sync(twl->dev); + twl4030_i2c_access(twl, 1); + twl4030_usb_set_mode(twl, twl->usb_mode); + if (twl->usb_mode == T2_USB_MODE_ULPI) + twl4030_i2c_access(twl, 0); /* * XXX When VBUS gets driven after musb goes to A mode, @@ -558,9 +577,27 @@ static irqreturn_t twl4030_usb_irq(int irq, void *_twl) * USB_LINK_VBUS state. musb_hdrc won't care until it * starts to handle softconnect right. */ + if ((status == OMAP_MUSB_VBUS_VALID) || + (status == OMAP_MUSB_ID_GROUND)) { + if (twl->asleep) + pm_runtime_get_sync(twl->dev); + } else { + if (!twl->asleep) { + pm_runtime_mark_last_busy(twl->dev); + pm_runtime_put_autosuspend(twl->dev); + } + } omap_musb_mailbox(status); } - sysfs_notify(&twl->dev->kobj, NULL, "vbus"); + + /* don't schedule during sleep - irq works right then */ + if (status == OMAP_MUSB_ID_GROUND && !twl->asleep) { + cancel_delayed_work(&twl->id_workaround_work); + schedule_delayed_work(&twl->id_workaround_work, HZ); + } + + if (irq) + sysfs_notify(&twl->dev->kobj, NULL, "vbus"); return IRQ_HANDLED; } @@ -569,29 +606,8 @@ static void twl4030_id_workaround_work(struct work_struct *work) { struct twl4030_usb *twl = container_of(work, struct twl4030_usb, id_workaround_work.work); - enum omap_musb_vbus_id_status status; - bool status_changed = false; - - status = twl4030_usb_linkstat(twl); - - spin_lock_irq(&twl->lock); - if (status >= 0 && status != twl->linkstat) { - twl->linkstat = status; - status_changed = true; - } - spin_unlock_irq(&twl->lock); - - if (status_changed) { - dev_dbg(twl->dev, "handle missing status change to %d\n", - status); - omap_musb_mailbox(status); - } - /* don't schedule during sleep - irq works right then */ - if (status == OMAP_MUSB_ID_GROUND && !twl->asleep) { - cancel_delayed_work(&twl->id_workaround_work); - schedule_delayed_work(&twl->id_workaround_work, HZ); - } + twl4030_usb_irq(0, twl); } static int twl4030_phy_init(struct phy *phy) @@ -599,22 +615,17 @@ static int twl4030_phy_init(struct phy *phy) struct twl4030_usb *twl = phy_get_drvdata(phy); enum omap_musb_vbus_id_status status; - /* - * Start in sleep state, we'll get called through set_suspend() - * callback when musb is runtime resumed and it's time to start. - */ - __twl4030_phy_power(twl, 0); - twl->asleep = 1; - + pm_runtime_get_sync(twl->dev); status = twl4030_usb_linkstat(twl); twl->linkstat = status; - if (status == OMAP_MUSB_ID_GROUND || status == OMAP_MUSB_VBUS_VALID) { + if (status == OMAP_MUSB_ID_GROUND || status == OMAP_MUSB_VBUS_VALID) omap_musb_mailbox(twl->linkstat); - twl4030_phy_power_on(phy); - } sysfs_notify(&twl->dev->kobj, NULL, "vbus"); + pm_runtime_mark_last_busy(twl->dev); + pm_runtime_put_autosuspend(twl->dev); + return 0; } @@ -650,6 +661,11 @@ static const struct phy_ops ops = { .owner = THIS_MODULE, }; +static const struct dev_pm_ops twl4030_usb_pm_ops = { + SET_RUNTIME_PM_OPS(twl4030_usb_runtime_suspend, + twl4030_usb_runtime_resume, NULL) +}; + static int twl4030_usb_probe(struct platform_device *pdev) { struct twl4030_usb_data *pdata = dev_get_platdata(&pdev->dev); @@ -726,6 +742,11 @@ static int twl4030_usb_probe(struct platform_device *pdev) ATOMIC_INIT_NOTIFIER_HEAD(&twl->phy.notifier); + pm_runtime_use_autosuspend(&pdev->dev); + pm_runtime_set_autosuspend_delay(&pdev->dev, 2000); + pm_runtime_enable(&pdev->dev); + pm_runtime_get_sync(&pdev->dev); + /* Our job is to use irqs and status from the power module * to keep the transceiver disabled when nothing's connected. * @@ -744,6 +765,9 @@ static int twl4030_usb_probe(struct platform_device *pdev) return status; } + pm_runtime_mark_last_busy(&pdev->dev); + pm_runtime_put_autosuspend(twl->dev); + dev_info(&pdev->dev, "Initialized TWL4030 USB module\n"); return 0; } @@ -753,6 +777,7 @@ static int twl4030_usb_remove(struct platform_device *pdev) struct twl4030_usb *twl = platform_get_drvdata(pdev); int val; + pm_runtime_get_sync(twl->dev); cancel_delayed_work(&twl->id_workaround_work); device_remove_file(twl->dev, &dev_attr_vbus); @@ -772,9 +797,8 @@ static int twl4030_usb_remove(struct platform_device *pdev) /* disable complete OTG block */ twl4030_usb_clear_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB); - - if (!twl->asleep) - twl4030_phy_power(twl, 0); + pm_runtime_mark_last_busy(twl->dev); + pm_runtime_put(twl->dev); return 0; } @@ -792,6 +816,7 @@ static struct platform_driver twl4030_usb_driver = { .remove = twl4030_usb_remove, .driver = { .name = "twl4030_usb", + .pm = &twl4030_usb_pm_ops, .owner = THIS_MODULE, .of_match_table = of_match_ptr(twl4030_usb_id_table), }, |