Input: ati_remote2 - add autosuspend support

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

1 files changed, 127 insertions, 6 deletions

diff --git a/drivers/input/misc/ati_remote2.c b/drivers/input/misc/ati_remote2.c
index f4918b9bb94..3c9988dc0e9 100644
--- 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;