1 files changed, 76 insertions, 37 deletions

diff --git a/drivers/input/mouse/appletouch.c b/drivers/input/mouse/appletouch.c
index e3215267db11..a1804bfdbb8c 100644
--- a/drivers/input/mouse/appletouch.c
+++ b/drivers/input/mouse/appletouch.c
@@ -155,6 +155,8 @@ struct atp {
         int                     xy_acc[ATP_XSENSORS + ATP_YSENSORS];
         int                     overflowwarn;   /* overflow warning printed? */
         int                     datalen;        /* size of an USB urb transfer */
+        int                     idlecount;      /* number of empty packets */
+        struct work_struct      work;
 };
 
 #define dbg_dump(msg, tab) \
@@ -208,6 +210,55 @@ static inline int atp_is_geyser_3(struct atp *dev)
                 (productId == GEYSER4_JIS_PRODUCT_ID);
 }
 
+/*
+ * By default Geyser 3 device sends standard USB HID mouse
+ * packets (Report ID 2). This code changes device mode, so it
+ * sends raw sensor reports (Report ID 5).
+ */
+static int atp_geyser3_init(struct usb_device *udev)
+{
+        char data[8];
+        int size;
+
+        size = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
+                        ATP_GEYSER3_MODE_READ_REQUEST_ID,
+                        USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+                        ATP_GEYSER3_MODE_REQUEST_VALUE,
+                        ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
+
+        if (size != 8) {
+                err("Could not do mode read request from device"
+                    " (Geyser 3 mode)");
+                return -EIO;
+        }
+
+        /* Apply the mode switch */
+        data[0] = ATP_GEYSER3_MODE_VENDOR_VALUE;
+
+        size = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+                        ATP_GEYSER3_MODE_WRITE_REQUEST_ID,
+                        USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+                        ATP_GEYSER3_MODE_REQUEST_VALUE,
+                        ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
+
+        if (size != 8) {
+                err("Could not do mode write request to device"
+                    " (Geyser 3 mode)");
+                return -EIO;
+        }
+        return 0;
+}
+
+/* Reinitialise the device if it's a geyser 3 */
+static void atp_reinit(struct work_struct *work)
+{
+        struct atp *dev = container_of(work, struct atp, work);
+        struct usb_device *udev = dev->udev;
+
+        dev->idlecount = 0;
+        atp_geyser3_init(udev);
+}
+
 static int atp_calculate_abs(int *xy_sensors, int nb_sensors, int fact,
                              int *z, int *fingers)
 {
@@ -277,6 +328,7 @@ static void atp_complete(struct urb* urb)
 {
         int x, y, x_z, y_z, x_f, y_f;
         int retval, i, j;
+        int key;
         struct atp *dev = urb->context;
 
         switch (urb->status) {
@@ -417,6 +469,7 @@ static void atp_complete(struct urb* urb)
                               ATP_XFACT, &x_z, &x_f);
         y = atp_calculate_abs(dev->xy_acc + ATP_XSENSORS, ATP_YSENSORS,
                               ATP_YFACT, &y_z, &y_f);
+        key = dev->data[dev->datalen - 1] & 1;
 
         if (x && y) {
                 if (dev->x_old != -1) {
@@ -439,8 +492,8 @@ static void atp_complete(struct urb* urb)
                 }
                 dev->x_old = x;
                 dev->y_old = y;
-        }
-        else if (!x && !y) {
+
+        } else if (!x && !y) {
 
                 dev->x_old = dev->y_old = -1;
                 input_report_key(dev->input, BTN_TOUCH, 0);
@@ -449,11 +502,21 @@ static void atp_complete(struct urb* urb)
 
                 /* reset the accumulator on release */
                 memset(dev->xy_acc, 0, sizeof(dev->xy_acc));
-        }
 
-        input_report_key(dev->input, BTN_LEFT,
-                         !!dev->data[dev->datalen - 1]);
+                /* Geyser 3 will continue to send packets continually after
+                   the first touch unless reinitialised. Do so if it's been
+                   idle for a while in order to avoid waking the kernel up
+                   several hundred times a second */
+                if (!key && atp_is_geyser_3(dev)) {
+                        dev->idlecount++;
+                        if (dev->idlecount == 10) {
+                                dev->valid = 0;
+                                schedule_work(&dev->work);
+                        }
+                }
+        }
 
+        input_report_key(dev->input, BTN_LEFT, key);
         input_sync(dev->input);
 
 exit:
@@ -480,6 +543,7 @@ static void atp_close(struct input_dev *input)
         struct atp *dev = input_get_drvdata(input);
 
         usb_kill_urb(dev->urb);
+        cancel_work_sync(&dev->work);
         dev->open = 0;
 }
 
@@ -528,40 +592,10 @@ static int atp_probe(struct usb_interface *iface, const struct usb_device_id *id
                 dev->datalen = 81;
 
         if (atp_is_geyser_3(dev)) {
-                /*
-                 * By default Geyser 3 device sends standard USB HID mouse
-                 * packets (Report ID 2). This code changes device mode, so it
-                 * sends raw sensor reports (Report ID 5).
-                 */
-                char data[8];
-                int size;
-
-                size = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
-                        ATP_GEYSER3_MODE_READ_REQUEST_ID,
-                        USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-                        ATP_GEYSER3_MODE_REQUEST_VALUE,
-                        ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
-
-                if (size != 8) {
-                        err("Could not do mode read request from device"
-                                                        " (Geyser 3 mode)");
+                /* switch to raw sensor mode */
+                if (atp_geyser3_init(udev))
                         goto err_free_devs;
-                }
-
-                /* Apply the mode switch */
-                data[0] = ATP_GEYSER3_MODE_VENDOR_VALUE;
-
-                size = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
-                        ATP_GEYSER3_MODE_WRITE_REQUEST_ID,
-                        USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-                        ATP_GEYSER3_MODE_REQUEST_VALUE,
-                        ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
 
-                if (size != 8) {
-                        err("Could not do mode write request to device"
-                                                        " (Geyser 3 mode)");
-                        goto err_free_devs;
-                }
                 printk("appletouch Geyser 3 inited.\n");
         }
 
@@ -636,6 +670,8 @@ static int atp_probe(struct usb_interface *iface, const struct usb_device_id *id
         /* save our data pointer in this interface device */
         usb_set_intfdata(iface, dev);
 
+        INIT_WORK(&dev->work, atp_reinit);
+
         return 0;
 
  err_free_buffer:
@@ -669,14 +705,17 @@ static void atp_disconnect(struct usb_interface *iface)
 static int atp_suspend(struct usb_interface *iface, pm_message_t message)
 {
         struct atp *dev = usb_get_intfdata(iface);
+
         usb_kill_urb(dev->urb);
         dev->valid = 0;
+
         return 0;
 }
 
 static int atp_resume(struct usb_interface *iface)
 {
         struct atp *dev = usb_get_intfdata(iface);
+
         if (dev->open && usb_submit_urb(dev->urb, GFP_ATOMIC))
                 return -EIO;