From c2344f13b59e007d782a3e591ebc551bc583a8b7 Mon Sep 17 00:00:00 2001 From: Robert Jarzmik Date: Sat, 24 Jan 2009 23:54:31 -0800 Subject: USB: gpio_vbus: add delayed vbus_session calls Call usb_gadget_vbus_connect() and ...disconnect() from a workqueue rather than from an irq handler, allowing msleep() calls in vbus_session. Update kerneldoc to match. [ dbrownell@users.sourceforge.net: more kerneldoc updates ] Signed-off-by: Robert Jarzmik Signed-off-by: David Brownell Signed-off-by: Greg Kroah-Hartman --- drivers/usb/otg/gpio_vbus.c | 42 +++++++++++++++++++++++++++++++----------- 1 file changed, 31 insertions(+), 11 deletions(-) (limited to 'drivers/usb/otg') diff --git a/drivers/usb/otg/gpio_vbus.c b/drivers/usb/otg/gpio_vbus.c index 63a6036f04b..1c26c94513e 100644 --- a/drivers/usb/otg/gpio_vbus.c +++ b/drivers/usb/otg/gpio_vbus.c @@ -13,6 +13,7 @@ #include #include #include +#include #include @@ -34,6 +35,7 @@ struct gpio_vbus_data { struct regulator *vbus_draw; int vbus_draw_enabled; unsigned mA; + struct work_struct work; }; @@ -76,24 +78,26 @@ static void set_vbus_draw(struct gpio_vbus_data *gpio_vbus, unsigned mA) gpio_vbus->mA = mA; } -/* VBUS change IRQ handler */ -static irqreturn_t gpio_vbus_irq(int irq, void *data) +static int is_vbus_powered(struct gpio_vbus_mach_info *pdata) { - struct platform_device *pdev = data; - struct gpio_vbus_mach_info *pdata = pdev->dev.platform_data; - struct gpio_vbus_data *gpio_vbus = platform_get_drvdata(pdev); - int gpio, vbus; + int vbus; vbus = gpio_get_value(pdata->gpio_vbus); if (pdata->gpio_vbus_inverted) vbus = !vbus; - dev_dbg(&pdev->dev, "VBUS %s (gadget: %s)\n", - vbus ? "supplied" : "inactive", - gpio_vbus->otg.gadget ? gpio_vbus->otg.gadget->name : "none"); + return vbus; +} + +static void gpio_vbus_work(struct work_struct *work) +{ + struct gpio_vbus_data *gpio_vbus = + container_of(work, struct gpio_vbus_data, work); + struct gpio_vbus_mach_info *pdata = gpio_vbus->dev->platform_data; + int gpio; if (!gpio_vbus->otg.gadget) - return IRQ_HANDLED; + return; /* Peripheral controllers which manage the pullup themselves won't have * gpio_pullup configured here. If it's configured here, we'll do what @@ -101,7 +105,7 @@ static irqreturn_t gpio_vbus_irq(int irq, void *data) * that may complicate usb_gadget_{,dis}connect() support. */ gpio = pdata->gpio_pullup; - if (vbus) { + if (is_vbus_powered(pdata)) { gpio_vbus->otg.state = OTG_STATE_B_PERIPHERAL; usb_gadget_vbus_connect(gpio_vbus->otg.gadget); @@ -121,6 +125,21 @@ static irqreturn_t gpio_vbus_irq(int irq, void *data) usb_gadget_vbus_disconnect(gpio_vbus->otg.gadget); gpio_vbus->otg.state = OTG_STATE_B_IDLE; } +} + +/* VBUS change IRQ handler */ +static irqreturn_t gpio_vbus_irq(int irq, void *data) +{ + struct platform_device *pdev = data; + struct gpio_vbus_mach_info *pdata = pdev->dev.platform_data; + struct gpio_vbus_data *gpio_vbus = platform_get_drvdata(pdev); + + dev_dbg(&pdev->dev, "VBUS %s (gadget: %s)\n", + is_vbus_powered(pdata) ? "supplied" : "inactive", + gpio_vbus->otg.gadget ? gpio_vbus->otg.gadget->name : "none"); + + if (gpio_vbus->otg.gadget) + schedule_work(&gpio_vbus->work); return IRQ_HANDLED; } @@ -257,6 +276,7 @@ static int __init gpio_vbus_probe(struct platform_device *pdev) irq, err); goto err_irq; } + INIT_WORK(&gpio_vbus->work, gpio_vbus_work); /* only active when a gadget is registered */ err = otg_set_transceiver(&gpio_vbus->otg); -- cgit v1.2.3