usb: gadget: convert all users to the new udc infrastructure

peripheral drivers are using usb_add_gadget()/usb_del_gadget() to
register/unregister to the udc-core.

The udc-core will take the first available gadget driver and attach
function driver which is calling usb_gadget_register_driver(). This is
the same behaviour we have right now.

Only dummy_hcd was tested, the others were compiled tested.

Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Anton Tikhomirov <av.tikhomirov@samsung.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Dan Carpenter <error27@gmail.com>
Cc: Darius Augulis <augulis.darius@gmail.com>
Cc: Eric Miao <eric.y.miao@gmail.com>
Cc: Jingoo Han <jg1.han@samsung.com>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Cc: Li Yang <leoli@freescale.com>
Cc: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Pavankumar Kondeti <pkondeti@codeaurora.org>
Cc: Roy Huang <roy.huang@analog.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Toshiharu Okada <toshiharu-linux@dsn.okisemi.com>
Cc: Xiaochen Shen <xiaochen.shen@intel.com>
Cc: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
Cc: Yuan-Hsin Chen <yhchen@faraday-tech.com>
Cc: cxie4 <cxie4@marvell.com>
Cc: linux-geode@lists.infradead.org
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 18 insertions, 5 deletions

diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
index 0a50a35e1853..728572cf709c 100644
--- a/drivers/usb/musb/musb_gadget.c
+++ b/drivers/usb/musb/musb_gadget.c
@@ -1704,6 +1704,10 @@ static int musb_gadget_pullup(struct usb_gadget *gadget, int is_on)
         return 0;
 }
 
+static int musb_gadget_start(struct usb_gadget_driver *driver,
+                int (*bind)(struct usb_gadget *));
+static int musb_gadget_stop(struct usb_gadget_driver *driver);
+
 static const struct usb_gadget_ops musb_gadget_operations = {
         .get_frame              = musb_gadget_get_frame,
         .wakeup                 = musb_gadget_wakeup,
@@ -1711,6 +1715,8 @@ static const struct usb_gadget_ops musb_gadget_operations = {
         /* .vbus_session                = musb_gadget_vbus_session, */
         .vbus_draw              = musb_gadget_vbus_draw,
         .pullup                 = musb_gadget_pullup,
+        .start                  = musb_gadget_start,
+        .stop                   = musb_gadget_stop,
 };
 
 /* ----------------------------------------------------------------------- */
@@ -1835,7 +1841,16 @@ int __init musb_gadget_setup(struct musb *musb)
         if (status != 0) {
                 put_device(&musb->g.dev);
                 the_gadget = NULL;
+                return status;
         }
+        status = usb_add_gadget_udc(musb->controller, &musb->g);
+        if (status)
+                goto err;
+
+        return 0;
+err:
+        device_unregister(&musb->g.dev);
+        the_gadget = NULL;
         return status;
 }
 
@@ -1844,6 +1859,7 @@ void musb_gadget_cleanup(struct musb *musb)
         if (musb != the_gadget)
                 return;
 
+        usb_del_gadget_udc(&musb->g);
         device_unregister(&musb->g.dev);
         the_gadget = NULL;
 }
@@ -1860,7 +1876,7 @@ void musb_gadget_cleanup(struct musb *musb)
  * @param bind the driver's bind function
  * @return <0 if error, 0 if everything is fine
  */
-int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+static int musb_gadget_start(struct usb_gadget_driver *driver,
                 int (*bind)(struct usb_gadget *))
 {
         struct musb             *musb = the_gadget;
@@ -1962,7 +1978,6 @@ err1:
 err0:
         return retval;
 }
-EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 static void stop_activity(struct musb *musb, struct usb_gadget_driver *driver)
 {
@@ -2012,7 +2027,7 @@ static void stop_activity(struct musb *musb, struct usb_gadget_driver *driver)
  *
  * @param driver the gadget driver to unregister
  */
-int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
+static int musb_gadget_stop(struct usb_gadget_driver *driver)
 {
         struct musb     *musb = the_gadget;
         unsigned long   flags;
@@ -2071,8 +2086,6 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 
         return 0;
 }
-EXPORT_SYMBOL(usb_gadget_unregister_driver);
-
 
 /* ----------------------------------------------------------------------- */