diff options
Diffstat (limited to 'drivers/usb/otg/twl4030-usb.c')
| -rw-r--r-- | drivers/usb/otg/twl4030-usb.c | 46 |
1 files changed, 16 insertions, 30 deletions
diff --git a/drivers/usb/otg/twl4030-usb.c b/drivers/usb/otg/twl4030-usb.c index 2be9f2fa41f9..223cdf46ccb7 100644 --- a/drivers/usb/otg/twl4030-usb.c +++ b/drivers/usb/otg/twl4030-usb.c @@ -36,7 +36,8 @@ #include <linux/i2c/twl.h> #include <linux/regulator/consumer.h> #include <linux/err.h> - +#include <linux/notifier.h> +#include <linux/slab.h> /* Register defines */ @@ -236,15 +237,6 @@ #define PMBR1 0x0D #define GPIO_USB_4PIN_ULPI_2430C (3 << 0) - - -enum linkstat { - USB_LINK_UNKNOWN = 0, - USB_LINK_NONE, - USB_LINK_VBUS, - USB_LINK_ID, -}; - struct twl4030_usb { struct otg_transceiver otg; struct device *dev; @@ -347,10 +339,10 @@ twl4030_usb_clear_bits(struct twl4030_usb *twl, u8 reg, u8 bits) /*-------------------------------------------------------------------------*/ -static enum linkstat twl4030_usb_linkstat(struct twl4030_usb *twl) +static enum usb_xceiv_events twl4030_usb_linkstat(struct twl4030_usb *twl) { int status; - int linkstat = USB_LINK_UNKNOWN; + int linkstat = USB_EVENT_NONE; /* * For ID/VBUS sensing, see manual section 15.4.8 ... @@ -368,11 +360,11 @@ static enum linkstat twl4030_usb_linkstat(struct twl4030_usb *twl) dev_err(twl->dev, "USB link status err %d\n", status); else if (status & (BIT(7) | BIT(2))) { if (status & BIT(2)) - linkstat = USB_LINK_ID; + linkstat = USB_EVENT_ID; else - linkstat = USB_LINK_VBUS; + linkstat = USB_EVENT_VBUS; } else - linkstat = USB_LINK_NONE; + linkstat = USB_EVENT_NONE; dev_dbg(twl->dev, "HW_CONDITIONS 0x%02x/%d; link %d\n", status, status, linkstat); @@ -383,7 +375,7 @@ static enum linkstat twl4030_usb_linkstat(struct twl4030_usb *twl) spin_lock_irq(&twl->lock); twl->linkstat = linkstat; - if (linkstat == USB_LINK_ID) { + if (linkstat == USB_EVENT_ID) { twl->otg.default_a = true; twl->otg.state = OTG_STATE_A_IDLE; } else { @@ -564,7 +556,7 @@ static ssize_t twl4030_usb_vbus_show(struct device *dev, spin_lock_irqsave(&twl->lock, flags); ret = sprintf(buf, "%s\n", - (twl->linkstat == USB_LINK_VBUS) ? "on" : "off"); + (twl->linkstat == USB_EVENT_VBUS) ? "on" : "off"); spin_unlock_irqrestore(&twl->lock, flags); return ret; @@ -576,17 +568,8 @@ static irqreturn_t twl4030_usb_irq(int irq, void *_twl) struct twl4030_usb *twl = _twl; int status; -#ifdef CONFIG_LOCKDEP - /* WORKAROUND for lockdep forcing IRQF_DISABLED on us, which - * we don't want and can't tolerate. Although it might be - * friendlier not to borrow this thread context... - */ - local_irq_enable(); -#endif - status = twl4030_usb_linkstat(twl); - if (status != USB_LINK_UNKNOWN) { - + if (status >= 0) { /* FIXME add a set_power() method so that B-devices can * configure the charger appropriately. It's not always * correct to consume VBUS power, and how much current to @@ -598,12 +581,13 @@ 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 == USB_LINK_NONE) + if (status == USB_EVENT_NONE) twl4030_phy_suspend(twl, 0); else twl4030_phy_resume(twl); - twl4030charger_usb_en(status == USB_LINK_VBUS); + blocking_notifier_call_chain(&twl->otg.notifier, status, + twl->otg.gadget); } sysfs_notify(&twl->dev->kobj, NULL, "vbus"); @@ -693,6 +677,8 @@ static int __devinit twl4030_usb_probe(struct platform_device *pdev) if (device_create_file(&pdev->dev, &dev_attr_vbus)) dev_warn(&pdev->dev, "could not create sysfs file\n"); + BLOCKING_INIT_NOTIFIER_HEAD(&twl->otg.notifier); + /* Our job is to use irqs and status from the power module * to keep the transceiver disabled when nothing's connected. * @@ -702,7 +688,7 @@ static int __devinit twl4030_usb_probe(struct platform_device *pdev) * need both handles, otherwise just one suffices. */ twl->irq_enabled = true; - status = request_irq(twl->irq, twl4030_usb_irq, + status = request_threaded_irq(twl->irq, NULL, twl4030_usb_irq, IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING, "twl4030_usb", twl); if (status < 0) { |