usb: gadget: atmel_usba_udc: convert to newstyle start/stop interface
This patches converts the driver into the new style start/stop interface.
As a result the driver no longer uses the static global the_udc
variable in start/stop functions. I kept the the_udc variable since it
makes the init code a little simpler.
Someone with hardware might want to look if it possible to move the vbus
irq/toggle_bias code into ->pullup().
Compile tested only.
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/gadget/atmel_usba_udc.c b/drivers/usb/gadget/atmel_usba_udc.c
index f545e93..e23bf79 100644
--- a/drivers/usb/gadget/atmel_usba_udc.c
+++ b/drivers/usb/gadget/atmel_usba_udc.c
@@ -1008,16 +1008,16 @@
return 0;
}
-static int atmel_usba_start(struct usb_gadget_driver *driver,
- int (*bind)(struct usb_gadget *));
-static int atmel_usba_stop(struct usb_gadget_driver *driver);
-
+static int atmel_usba_start(struct usb_gadget *gadget,
+ struct usb_gadget_driver *driver);
+static int atmel_usba_stop(struct usb_gadget *gadget,
+ struct usb_gadget_driver *driver);
static const struct usb_gadget_ops usba_udc_ops = {
.get_frame = usba_udc_get_frame,
.wakeup = usba_udc_wakeup,
.set_selfpowered = usba_udc_set_selfpowered,
- .start = atmel_usba_start,
- .stop = atmel_usba_stop,
+ .udc_start = atmel_usba_start,
+ .udc_stop = atmel_usba_stop,
};
static struct usb_endpoint_descriptor usba_ep0_desc = {
@@ -1795,21 +1795,13 @@
return IRQ_HANDLED;
}
-static int atmel_usba_start(struct usb_gadget_driver *driver,
- int (*bind)(struct usb_gadget *))
+static int atmel_usba_start(struct usb_gadget *gadget,
+ struct usb_gadget_driver *driver)
{
- struct usba_udc *udc = &the_udc;
+ struct usba_udc *udc = container_of(gadget, struct usba_udc, gadget);
unsigned long flags;
- int ret;
-
- if (!udc->pdev)
- return -ENODEV;
spin_lock_irqsave(&udc->lock, flags);
- if (udc->driver) {
- spin_unlock_irqrestore(&udc->lock, flags);
- return -EBUSY;
- }
udc->devstatus = 1 << USB_DEVICE_SELF_POWERED;
udc->driver = driver;
@@ -1819,13 +1811,6 @@
clk_enable(udc->pclk);
clk_enable(udc->hclk);
- ret = bind(&udc->gadget);
- if (ret) {
- DBG(DBG_ERR, "Could not bind to driver %s: error %d\n",
- driver->driver.name, ret);
- goto err_driver_bind;
- }
-
DBG(DBG_GADGET, "registered driver `%s'\n", driver->driver.name);
udc->vbus_prev = 0;
@@ -1842,23 +1827,14 @@
spin_unlock_irqrestore(&udc->lock, flags);
return 0;
-
-err_driver_bind:
- udc->driver = NULL;
- udc->gadget.dev.driver = NULL;
- return ret;
}
-static int atmel_usba_stop(struct usb_gadget_driver *driver)
+static int atmel_usba_stop(struct usb_gadget *gadget,
+ struct usb_gadget_driver *driver)
{
- struct usba_udc *udc = &the_udc;
+ struct usba_udc *udc = container_of(gadget, struct usba_udc, gadget);
unsigned long flags;
- if (!udc->pdev)
- return -ENODEV;
- if (driver != udc->driver || !driver->unbind)
- return -EINVAL;
-
if (gpio_is_valid(udc->vbus_pin))
disable_irq(gpio_to_irq(udc->vbus_pin));
@@ -1871,10 +1847,6 @@
toggle_bias(0);
usba_writel(udc, CTRL, USBA_DISABLE_MASK);
- if (udc->driver->disconnect)
- udc->driver->disconnect(&udc->gadget);
-
- driver->unbind(&udc->gadget);
udc->gadget.dev.driver = NULL;
udc->driver = NULL;