Input: appletouch - implement reset-resume logic

On some boxes the touchpad needs to be reinitialized after resume to make
it function again. This fixes bugzilla #10825.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 41 insertions, 8 deletions

diff --git a/drivers/input/mouse/appletouch.c b/drivers/input/mouse/appletouch.c
index 8dd3942f3022..ce6fdec19e14 100644
--- a/drivers/input/mouse/appletouch.c
+++ b/drivers/input/mouse/appletouch.c
@@ -589,6 +589,21 @@ static void atp_close(struct input_dev *input)
         dev->open = 0;
 }
 
+static int atp_handle_geyser(struct atp *dev)
+{
+        struct usb_device *udev = dev->udev;
+
+        if (!atp_is_fountain(dev)) {
+                /* switch to raw sensor mode */
+                if (atp_geyser_init(udev))
+                        return -EIO;
+
+                printk(KERN_INFO "appletouch: Geyser mode initialized.\n");
+        }
+
+        return 0;
+}
+
 static int atp_probe(struct usb_interface *iface, const struct usb_device_id *id)
 {
         struct atp *dev;
@@ -633,14 +648,6 @@ static int atp_probe(struct usb_interface *iface, const struct usb_device_id *id
         else
                 dev->datalen = 81;
 
-        if (!atp_is_fountain(dev)) {
-                /* switch to raw sensor mode */
-                if (atp_geyser_init(udev))
-                        goto err_free_devs;
-
-                printk(KERN_INFO "appletouch: Geyser mode initialized.\n");
-        }
-
         dev->urb = usb_alloc_urb(0, GFP_KERNEL);
         if (!dev->urb)
                 goto err_free_devs;
@@ -654,6 +661,10 @@ static int atp_probe(struct usb_interface *iface, const struct usb_device_id *id
                          usb_rcvintpipe(udev, int_in_endpointAddr),
                          dev->data, dev->datalen, atp_complete, dev, 1);
 
+        error = atp_handle_geyser(dev);
+        if (error)
+                goto err_free_buffer;
+
         usb_make_path(udev, dev->phys, sizeof(dev->phys));
         strlcat(dev->phys, "/input0", sizeof(dev->phys));
 
@@ -744,6 +755,20 @@ static void atp_disconnect(struct usb_interface *iface)
         printk(KERN_INFO "input: appletouch disconnected\n");
 }
 
+static int atp_recover(struct atp *dev)
+{
+        int error;
+
+        error = atp_handle_geyser(dev);
+        if (error)
+                return error;
+
+        if (dev->open && usb_submit_urb(dev->urb, GFP_ATOMIC))
+                return -EIO;
+
+        return 0;
+}
+
 static int atp_suspend(struct usb_interface *iface, pm_message_t message)
 {
         struct atp *dev = usb_get_intfdata(iface);
@@ -764,12 +789,20 @@ static int atp_resume(struct usb_interface *iface)
         return 0;
 }
 
+static int atp_reset_resume(struct usb_interface *iface)
+{
+        struct atp *dev = usb_get_intfdata(iface);
+
+        return atp_recover(dev);
+}
+
 static struct usb_driver atp_driver = {
         .name           = "appletouch",
         .probe          = atp_probe,
         .disconnect     = atp_disconnect,
         .suspend        = atp_suspend,
         .resume         = atp_resume,
+        .reset_resume   = atp_reset_resume,
         .id_table       = atp_table,
 };