Input: ati_remote2 - add autosuspend support

Signed-off-by: Ville Syrjala <syrjala@sci.fi>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

diff --git a/drivers/input/misc/ati_remote2.c b/drivers/input/misc/ati_remote2.c
index f4918b9..3c9988d 100644 (file)
--- a/drivers/input/misc/ati_remote2.c
+++ b/drivers/input/misc/ati_remote2.c
@@ -45,6 +45,13 @@ static struct usb_device_id ati_remote2_id_table[] = {
 };
 MODULE_DEVICE_TABLE(usb, ati_remote2_id_table);
 
+static DEFINE_MUTEX(ati_remote2_mutex);
+
+enum {
+       ATI_REMOTE2_OPENED = 0x1,
+       ATI_REMOTE2_SUSPENDED = 0x2,
+};
+
 enum {
        ATI_REMOTE2_AUX1,
        ATI_REMOTE2_AUX2,
@@ -124,46 +131,103 @@ struct ati_remote2 {
 
        /* Each mode (AUX1-AUX4 and PC) can have an independent keymap. */
        u16 keycode[ATI_REMOTE2_MODES][ARRAY_SIZE(ati_remote2_key_table)];
+
+       unsigned int flags;
 };
 
 static int ati_remote2_probe(struct usb_interface *interface, const struct usb_device_id *id);
 static void ati_remote2_disconnect(struct usb_interface *interface);
+static int ati_remote2_suspend(struct usb_interface *interface, pm_message_t message);
+static int ati_remote2_resume(struct usb_interface *interface);
 
 static struct usb_driver ati_remote2_driver = {
        .name       = "ati_remote2",
        .probe      = ati_remote2_probe,
        .disconnect = ati_remote2_disconnect,
        .id_table   = ati_remote2_id_table,
+       .suspend    = ati_remote2_suspend,
+       .resume     = ati_remote2_resume,
+       .supports_autosuspend = 1,
 };
 
-static int ati_remote2_open(struct input_dev *idev)
+static int ati_remote2_submit_urbs(struct ati_remote2 *ar2)
 {
-       struct ati_remote2 *ar2 = input_get_drvdata(idev);
        int r;
 
        r = usb_submit_urb(ar2->urb[0], GFP_KERNEL);
        if (r) {
                dev_err(&ar2->intf[0]->dev,
-                       "%s: usb_submit_urb() = %d\n", __func__, r);
+                       "%s(): usb_submit_urb() = %d\n", __func__, r);
                return r;
        }
        r = usb_submit_urb(ar2->urb[1], GFP_KERNEL);
        if (r) {
                usb_kill_urb(ar2->urb[0]);
                dev_err(&ar2->intf[1]->dev,
-                       "%s: usb_submit_urb() = %d\n", __func__, r);
+                       "%s(): usb_submit_urb() = %d\n", __func__, r);
                return r;
        }
 
        return 0;
 }
 
+static void ati_remote2_kill_urbs(struct ati_remote2 *ar2)
+{
+       usb_kill_urb(ar2->urb[1]);
+       usb_kill_urb(ar2->urb[0]);
+}
+
+static int ati_remote2_open(struct input_dev *idev)
+{
+       struct ati_remote2 *ar2 = input_get_drvdata(idev);
+       int r;
+
+       dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
+
+       r = usb_autopm_get_interface(ar2->intf[0]);
+       if (r) {
+               dev_err(&ar2->intf[0]->dev,
+                       "%s(): usb_autopm_get_interface() = %d\n", __func__, r);
+               goto fail1;
+       }
+
+       mutex_lock(&ati_remote2_mutex);
+
+       if (!(ar2->flags & ATI_REMOTE2_SUSPENDED)) {
+               r = ati_remote2_submit_urbs(ar2);
+               if (r)
+                       goto fail2;
+       }
+
+       ar2->flags |= ATI_REMOTE2_OPENED;
+
+       mutex_unlock(&ati_remote2_mutex);
+
+       usb_autopm_put_interface(ar2->intf[0]);
+
+       return 0;
+
+ fail2:
+       mutex_unlock(&ati_remote2_mutex);
+       usb_autopm_put_interface(ar2->intf[0]);
+ fail1:
+       return r;
+}
+
 static void ati_remote2_close(struct input_dev *idev)
 {
        struct ati_remote2 *ar2 = input_get_drvdata(idev);
 
-       usb_kill_urb(ar2->urb[0]);
-       usb_kill_urb(ar2->urb[1]);
+       dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
+
+       mutex_lock(&ati_remote2_mutex);
+
+       if (!(ar2->flags & ATI_REMOTE2_SUSPENDED))
+               ati_remote2_kill_urbs(ar2);
+
+       ar2->flags &= ~ATI_REMOTE2_OPENED;
+
+       mutex_unlock(&ati_remote2_mutex);
 }
 
 static void ati_remote2_input_mouse(struct ati_remote2 *ar2)
@@ -288,6 +352,7 @@ static void ati_remote2_complete_mouse(struct urb *urb)
 
        switch (urb->status) {
        case 0:
+               usb_mark_last_busy(ar2->udev);
                ati_remote2_input_mouse(ar2);
                break;
        case -ENOENT:
@@ -298,6 +363,7 @@ static void ati_remote2_complete_mouse(struct urb *urb)
                        "%s(): urb status = %d\n", __func__, urb->status);
                return;
        default:
+               usb_mark_last_busy(ar2->udev);
                dev_err(&ar2->intf[0]->dev,
                        "%s(): urb status = %d\n", __func__, urb->status);
        }
@@ -315,6 +381,7 @@ static void ati_remote2_complete_key(struct urb *urb)
 
        switch (urb->status) {
        case 0:
+               usb_mark_last_busy(ar2->udev);
                ati_remote2_input_key(ar2);
                break;
        case -ENOENT:
@@ -325,6 +392,7 @@ static void ati_remote2_complete_key(struct urb *urb)
                        "%s(): urb status = %d\n", __func__, urb->status);
                return;
        default:
+               usb_mark_last_busy(ar2->udev);
                dev_err(&ar2->intf[1]->dev,
                        "%s(): urb status = %d\n", __func__, urb->status);
        }
@@ -562,6 +630,8 @@ static int ati_remote2_probe(struct usb_interface *interface, const struct usb_d
 
        usb_set_intfdata(interface, ar2);
 
+       interface->needs_remote_wakeup = 1;
+
        return 0;
 
  fail2:
@@ -594,6 +664,57 @@ static void ati_remote2_disconnect(struct usb_interface *interface)
        kfree(ar2);
 }
 
+static int ati_remote2_suspend(struct usb_interface *interface,
+                              pm_message_t message)
+{
+       struct ati_remote2 *ar2;
+       struct usb_host_interface *alt = interface->cur_altsetting;
+
+       if (alt->desc.bInterfaceNumber)
+               return 0;
+
+       ar2 = usb_get_intfdata(interface);
+
+       dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
+
+       mutex_lock(&ati_remote2_mutex);
+
+       if (ar2->flags & ATI_REMOTE2_OPENED)
+               ati_remote2_kill_urbs(ar2);
+
+       ar2->flags |= ATI_REMOTE2_SUSPENDED;
+
+       mutex_unlock(&ati_remote2_mutex);
+
+       return 0;
+}
+
+static int ati_remote2_resume(struct usb_interface *interface)
+{
+       struct ati_remote2 *ar2;
+       struct usb_host_interface *alt = interface->cur_altsetting;
+       int r = 0;
+
+       if (alt->desc.bInterfaceNumber)
+               return 0;
+
+       ar2 = usb_get_intfdata(interface);
+
+       dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
+
+       mutex_lock(&ati_remote2_mutex);
+
+       if (ar2->flags & ATI_REMOTE2_OPENED)
+               r = ati_remote2_submit_urbs(ar2);
+
+       if (!r)
+               ar2->flags &= ~ATI_REMOTE2_SUSPENDED;
+
+       mutex_unlock(&ati_remote2_mutex);
+
+       return r;
+}
+
 static int __init ati_remote2_init(void)
 {
        int r;