From 81ab8585c7e54d3d0c7eeac06e2b5ad034a7c335 Mon Sep 17 00:00:00 2001
From: "giwoong.kim" <giwoong.kim@samsung.com>
Date: Fri, 31 Aug 2012 14:50:38 +0900
Subject: [PATCH] [Title] added some log to usb touchscreen [Type] enhancement
 [Module] Emulator / touch [Priority] major [Jira#] [Redmine#] [Problem]
 [Cause] [Solution] [TestCase]

---
 drivers/maru/maru_touchscreen.c        | 19 +++++++++++++++++--
 drivers/maru/maru_virtio_touchscreen.c | 12 ++++++------
 2 files changed, 23 insertions(+), 8 deletions(-)

diff --git a/drivers/maru/maru_touchscreen.c b/drivers/maru/maru_touchscreen.c
index d77a0cbb1222..4861280287b8 100644
--- a/drivers/maru/maru_touchscreen.c
+++ b/drivers/maru/maru_touchscreen.c
@@ -122,6 +122,8 @@ static int emul_touchscreen_open(struct input_dev *dev)
 {
     struct emul_touchscreen *usb_ts = input_get_drvdata(dev);
 
+    printk(KERN_INFO "usb touchscreen device is opened\n");
+
     mutex_lock(&usb_ts->lock);
     usb_ts->irq->dev = usb_ts->usbdev;
 
@@ -147,6 +149,8 @@ static void emul_touchscreen_close(struct input_dev *dev)
 {
     struct emul_touchscreen *usb_ts = input_get_drvdata(dev);
 
+    printk(KERN_INFO "usb touchscreen device is closed\n");
+
     mutex_lock(&usb_ts->lock);
     usb_kill_urb(usb_ts->irq);
     usb_ts->open = 0;
@@ -160,6 +164,8 @@ static int emul_touchscreen_probe(struct usb_interface *intf, const struct usb_d
     struct emul_touchscreen *usb_ts;
     int error = -ENOMEM;
 
+    printk(KERN_INFO "usb touchscreen driver is probed\n");
+
     usb_ts = kzalloc(sizeof(struct emul_touchscreen), GFP_KERNEL);
     if (!usb_ts) {
         goto fail1;
@@ -238,6 +244,8 @@ static void emul_touchscreen_disconnect(struct usb_interface *intf)
 {
     struct emul_touchscreen *usb_ts = usb_get_intfdata(intf);
 
+    printk(KERN_INFO "usb touchscreen device is disconnected\n");
+
     usb_set_intfdata(intf, NULL);
     if (usb_ts) {
         usb_kill_urb(usb_ts->irq);
@@ -252,6 +260,8 @@ static int emul_touchscreen_suspend(struct usb_interface *intf, pm_message_t mes
 {
     struct emul_touchscreen *usb_ts = usb_get_intfdata(intf);
 
+    printk(KERN_INFO "usb touchscreen device is suspended\n");
+
     mutex_lock(&usb_ts->lock);
     usb_kill_urb(usb_ts->irq);
     mutex_unlock(&usb_ts->lock);
@@ -262,7 +272,9 @@ static int emul_touchscreen_suspend(struct usb_interface *intf, pm_message_t mes
 static int emul_touchscreen_resume(struct usb_interface *intf)
 {
     struct emul_touchscreen *usb_ts = usb_get_intfdata(intf);
-    int rv;
+    int rv = 0;
+
+    printk(KERN_INFO "usb touchscreen device is resumed\n");
 
     mutex_lock(&usb_ts->lock);
     if (usb_ts->open) {
@@ -295,8 +307,10 @@ static struct usb_driver emul_touchscreen_driver = {
 
 static int __init emul_touchscreen_init(void)
 {
+    printk(KERN_INFO "usb touchscreen device is initialized\n");
+
     int result = usb_register(&emul_touchscreen_driver);
-    if (result == 0) {
+    if (result != 0) {
         printk(KERN_ERR "emul_touchscreen_init: usb_register=%d\n", result);
     }
 
@@ -305,6 +319,7 @@ static int __init emul_touchscreen_init(void)
 
 static void __exit emul_touchscreen_exit(void)
 {
+    printk(KERN_INFO "usb touchscreen device is destroyed\n");
     usb_deregister(&emul_touchscreen_driver);
 }
 
diff --git a/drivers/maru/maru_virtio_touchscreen.c b/drivers/maru/maru_virtio_touchscreen.c
index 50acd0fcd930..225c852bb319 100644
--- a/drivers/maru/maru_virtio_touchscreen.c
+++ b/drivers/maru/maru_virtio_touchscreen.c
@@ -48,10 +48,10 @@ MODULE_DESCRIPTION("Emulator Virtio Touchscreen driver");
 #define DEVICE_NAME "virtio-touchscreen"
 
 /* This structure must match the qemu definitions */
-typedef struct EmulTouchState {
+typedef struct EmulTouchEvent {
     uint16_t x, y, z;
     uint8_t state;
-} EmulTouchState;
+} EmulTouchEvent;
 
 typedef struct virtio_touchscreen
 {
@@ -81,21 +81,21 @@ static struct virtio_device_id id_table[] = {
 static int run_touchscreen(void *_vtouchscreen)
 {
     virtio_touchscreen *vt = NULL;
-    EmulTouchState *vbuf = NULL;
-    EmulTouchState *event = NULL;
+    EmulTouchEvent *vbuf = NULL;
+    EmulTouchEvent *event = NULL;
     struct scatterlist sg;
     int count = 0; // remaining capacity of queue
 
     struct input_dev *input_dev = NULL;
 
     vt = _vtouchscreen;
-    vbuf = kzalloc(sizeof(EmulTouchState), GFP_KERNEL);
+    vbuf = kzalloc(sizeof(EmulTouchEvent), GFP_KERNEL);
     vbuf->x = MAX_TRKID; // max touch point
 
     input_dev = vt->idev;
 
     while (!kthread_should_stop()) {
-        sg_init_one(&sg, vbuf, sizeof(EmulTouchState));
+        sg_init_one(&sg, vbuf, sizeof(EmulTouchEvent));
 
         if (virtqueue_add_buf(vt->vq, &sg, 0, 1, (void*)vbuf, GFP_ATOMIC) >= 0) {
             virtqueue_kick(vt->vq);
-- 
2.34.1