[PATCH 01/29] usb: gadget: mv_udc: use udc_start and udc_stop functions
Chao Xie
xiechao.mail at gmail.com
Wed Nov 21 21:04:42 EST 2012
From: Chao Xie <chao.xie at marvell.com>
udc_start and udc_stop reduce code duplication in comparison to
start and stop generalising calls done by all drivers
(i.e. bind and unbind) and moving these calls to common code.
Signed-off-by: Chao Xie <xiechao.mail at gmail.com>
---
drivers/usb/gadget/mv_udc_core.c | 81 +++++++++++++++++---------------------
1 files changed, 36 insertions(+), 45 deletions(-)
diff --git a/drivers/usb/gadget/mv_udc_core.c b/drivers/usb/gadget/mv_udc_core.c
index ea45224..fa4950a 100644
--- a/drivers/usb/gadget/mv_udc_core.c
+++ b/drivers/usb/gadget/mv_udc_core.c
@@ -61,9 +61,6 @@ static DECLARE_COMPLETION(release_done);
static const char driver_name[] = "mv_udc";
static const char driver_desc[] = DRIVER_DESC;
-/* controller device global variable */
-static struct mv_udc *the_controller;
-
static void nuke(struct mv_ep *ep, int status);
static void stop_activity(struct mv_udc *udc, struct usb_gadget_driver *driver);
@@ -1268,9 +1265,8 @@ static int mv_udc_pullup(struct usb_gadget *gadget, int is_on)
return retval;
}
-static int mv_udc_start(struct usb_gadget_driver *driver,
- int (*bind)(struct usb_gadget *, struct usb_gadget_driver *));
-static int mv_udc_stop(struct usb_gadget_driver *driver);
+static int mv_udc_start(struct usb_gadget *, struct usb_gadget_driver *);
+static int mv_udc_stop(struct usb_gadget *, struct usb_gadget_driver *);
/* device controller usb_gadget_ops structure */
static const struct usb_gadget_ops mv_ops = {
@@ -1285,8 +1281,8 @@ static const struct usb_gadget_ops mv_ops = {
/* D+ pullup, software-controlled connect/disconnect to USB host */
.pullup = mv_udc_pullup,
- .start = mv_udc_start,
- .stop = mv_udc_stop,
+ .udc_start = mv_udc_start,
+ .udc_stop = mv_udc_stop,
};
static int eps_init(struct mv_udc *udc)
@@ -1373,15 +1369,14 @@ static void stop_activity(struct mv_udc *udc, struct usb_gadget_driver *driver)
}
}
-static int mv_udc_start(struct usb_gadget_driver *driver,
- int (*bind)(struct usb_gadget *, struct usb_gadget_driver *))
+static int mv_udc_start(struct usb_gadget *gadget,
+ struct usb_gadget_driver *driver)
{
- struct mv_udc *udc = the_controller;
+ struct mv_udc *udc;
int retval = 0;
unsigned long flags;
- if (!udc)
- return -ENODEV;
+ udc = container_of(gadget, struct mv_udc, gadget);
if (udc->driver)
return -EBUSY;
@@ -1399,26 +1394,14 @@ static int mv_udc_start(struct usb_gadget_driver *driver,
spin_unlock_irqrestore(&udc->lock, flags);
- retval = bind(&udc->gadget, driver);
- if (retval) {
- dev_err(&udc->dev->dev, "bind to driver %s --> %d\n",
- driver->driver.name, retval);
- udc->driver = NULL;
- udc->gadget.dev.driver = NULL;
- return retval;
- }
-
if (!IS_ERR_OR_NULL(udc->transceiver)) {
retval = otg_set_peripheral(udc->transceiver->otg,
&udc->gadget);
if (retval) {
dev_err(&udc->dev->dev,
"unable to register peripheral to otg\n");
- if (driver->unbind) {
- driver->unbind(&udc->gadget);
- udc->gadget.dev.driver = NULL;
- udc->driver = NULL;
- }
+ udc->driver = NULL;
+ udc->gadget.dev.driver = NULL;
return retval;
}
}
@@ -1433,13 +1416,13 @@ static int mv_udc_start(struct usb_gadget_driver *driver,
return 0;
}
-static int mv_udc_stop(struct usb_gadget_driver *driver)
+static int mv_udc_stop(struct usb_gadget *gadget,
+ struct usb_gadget_driver *driver)
{
- struct mv_udc *udc = the_controller;
+ struct mv_udc *udc;
unsigned long flags;
- if (!udc)
- return -ENODEV;
+ udc = container_of(gadget, struct mv_udc, gadget);
spin_lock_irqsave(&udc->lock, flags);
@@ -1454,7 +1437,6 @@ static int mv_udc_stop(struct usb_gadget_driver *driver)
spin_unlock_irqrestore(&udc->lock, flags);
/* unbind gadget driver */
- driver->unbind(&udc->gadget);
udc->gadget.dev.driver = NULL;
udc->driver = NULL;
@@ -1472,10 +1454,13 @@ static void mv_set_ptc(struct mv_udc *udc, u32 mode)
static void prime_status_complete(struct usb_ep *ep, struct usb_request *_req)
{
- struct mv_udc *udc = the_controller;
+ struct mv_ep *mvep = container_of(ep, struct mv_ep, ep);
struct mv_req *req = container_of(_req, struct mv_req, req);
+ struct mv_udc *udc;
unsigned long flags;
+ udc = mvep->udc;
+
dev_info(&udc->dev->dev, "switch to test mode %d\n", req->test_mode);
spin_lock_irqsave(&udc->lock, flags);
@@ -2121,18 +2106,22 @@ static void mv_udc_vbus_work(struct work_struct *work)
}
/* release device structure */
-static void gadget_release(struct device *_dev)
+static void gadget_release(struct device *dev)
{
- struct mv_udc *udc = the_controller;
+ struct mv_udc *udc;
+
+ udc = dev_get_drvdata(dev);
complete(udc->done);
}
static int __devexit mv_udc_remove(struct platform_device *dev)
{
- struct mv_udc *udc = the_controller;
+ struct mv_udc *udc;
int clk_i;
+ udc = platform_get_drvdata(dev);
+
usb_del_gadget_udc(&udc->gadget);
if (udc->qwork) {
@@ -2183,8 +2172,6 @@ static int __devexit mv_udc_remove(struct platform_device *dev)
wait_for_completion(udc->done);
kfree(udc);
- the_controller = NULL;
-
return 0;
}
@@ -2209,7 +2196,6 @@ static int __devinit mv_udc_probe(struct platform_device *dev)
return -ENOMEM;
}
- the_controller = udc;
udc->done = &release_done;
udc->pdata = dev->dev.platform_data;
spin_lock_init(&udc->lock);
@@ -2400,6 +2386,7 @@ static int __devinit mv_udc_probe(struct platform_device *dev)
if (retval)
goto err_unregister;
+ platform_set_drvdata(dev, udc);
dev_info(&dev->dev, "successful probe UDC device %s clock gating.\n",
udc->clock_gating ? "with" : "without");
@@ -2431,15 +2418,16 @@ err_iounmap_capreg:
err_put_clk:
for (clk_i--; clk_i >= 0; clk_i--)
clk_put(udc->clk[clk_i]);
- the_controller = NULL;
kfree(udc);
return retval;
}
#ifdef CONFIG_PM
-static int mv_udc_suspend(struct device *_dev)
+static int mv_udc_suspend(struct device *dev)
{
- struct mv_udc *udc = the_controller;
+ struct mv_udc *udc;
+
+ udc = dev_get_drvdata(dev);
/* if OTG is enabled, the following will be done in OTG driver*/
if (!IS_ERR_OR_NULL(udc->transceiver))
@@ -2469,11 +2457,13 @@ static int mv_udc_suspend(struct device *_dev)
return 0;
}
-static int mv_udc_resume(struct device *_dev)
+static int mv_udc_resume(struct device *dev)
{
- struct mv_udc *udc = the_controller;
+ struct mv_udc *udc;
int retval;
+ udc = dev_get_drvdata(dev);
+
/* if OTG is enabled, the following will be done in OTG driver*/
if (!IS_ERR_OR_NULL(udc->transceiver))
return 0;
@@ -2501,9 +2491,10 @@ static const struct dev_pm_ops mv_udc_pm_ops = {
static void mv_udc_shutdown(struct platform_device *dev)
{
- struct mv_udc *udc = the_controller;
+ struct mv_udc *udc;
u32 mode;
+ udc = platform_get_drvdata(dev);
/* reset controller mode to IDLE */
mv_udc_enable(udc);
mode = readl(&udc->op_regs->usbmode);
--
1.7.4.1
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