1 files changed, 60 insertions, 9 deletions

diff --git a/drivers/hid/hid-ntrig.c b/drivers/hid/hid-ntrig.c
index fb69b8c4953f..69169efa1e16 100644
--- a/drivers/hid/hid-ntrig.c
+++ b/drivers/hid/hid-ntrig.c
@@ -90,6 +90,55 @@ struct ntrig_data {
 };
 
 
+/*
+ * This function converts the 4 byte raw firmware code into
+ * a string containing 5 comma separated numbers.
+ */
+static int ntrig_version_string(unsigned char *raw, char *buf)
+{
+	__u8 a =  (raw[1] & 0x0e) >> 1;
+	__u8 b =  (raw[0] & 0x3c) >> 2;
+	__u8 c = ((raw[0] & 0x03) << 3) | ((raw[3] & 0xe0) >> 5);
+	__u8 d = ((raw[3] & 0x07) << 3) | ((raw[2] & 0xe0) >> 5);
+	__u8 e =   raw[2] & 0x07;
+
+	/*
+	 * As yet unmapped bits:
+	 * 0b11000000 0b11110001 0b00011000 0b00011000
+	 */
+
+	return sprintf(buf, "%u.%u.%u.%u.%u", a, b, c, d, e);
+}
+
+static void ntrig_report_version(struct hid_device *hdev)
+{
+	int ret;
+	char buf[20];
+	struct usb_device *usb_dev = hid_to_usb_dev(hdev);
+	unsigned char *data = kmalloc(8, GFP_KERNEL);
+
+	if (!data)
+		goto err_free;
+
+	ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
+			      USB_REQ_CLEAR_FEATURE,
+			      USB_TYPE_CLASS | USB_RECIP_INTERFACE |
+			      USB_DIR_IN,
+			      0x30c, 1, data, 8,
+			      USB_CTRL_SET_TIMEOUT);
+
+	if (ret == 8) {
+		ret = ntrig_version_string(&data[2], buf);
+
+		dev_info(&hdev->dev,
+			 "Firmware version: %s (%02x%02x %02x%02x)\n",
+			 buf, data[2], data[3], data[4], data[5]);
+	}
+
+err_free:
+	kfree(data);
+}
+
 static ssize_t show_phys_width(struct device *dev,
 			       struct device_attribute *attr,
 			       char *buf)
@@ -377,8 +426,8 @@ static struct attribute_group ntrig_attribute_group = {
  */
 
 static int ntrig_input_mapping(struct hid_device *hdev, struct hid_input *hi,
-		struct hid_field *field, struct hid_usage *usage,
-		unsigned long **bit, int *max)
+			       struct hid_field *field, struct hid_usage *usage,
+			       unsigned long **bit, int *max)
 {
 	struct ntrig_data *nd = hid_get_drvdata(hdev);
 
@@ -448,13 +497,13 @@ static int ntrig_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 		/* width/height mapped on TouchMajor/TouchMinor/Orientation */
 		case HID_DG_WIDTH:
 			hid_map_usage(hi, usage, bit, max,
-					EV_ABS, ABS_MT_TOUCH_MAJOR);
+				      EV_ABS, ABS_MT_TOUCH_MAJOR);
 			return 1;
 		case HID_DG_HEIGHT:
 			hid_map_usage(hi, usage, bit, max,
-					EV_ABS, ABS_MT_TOUCH_MINOR);
+				      EV_ABS, ABS_MT_TOUCH_MINOR);
 			input_set_abs_params(hi->input, ABS_MT_ORIENTATION,
-					0, 1, 0, 0);
+					     0, 1, 0, 0);
 			return 1;
 		}
 		return 0;
@@ -468,8 +517,8 @@ static int ntrig_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 }
 
 static int ntrig_input_mapped(struct hid_device *hdev, struct hid_input *hi,
-		struct hid_field *field, struct hid_usage *usage,
-		unsigned long **bit, int *max)
+			      struct hid_field *field, struct hid_usage *usage,
+			      unsigned long **bit, int *max)
 {
 	/* No special mappings needed for the pen and single touch */
 	if (field->physical)
@@ -489,7 +538,7 @@ static int ntrig_input_mapped(struct hid_device *hdev, struct hid_input *hi,
  * and call input_mt_sync after each point if necessary
  */
 static int ntrig_event (struct hid_device *hid, struct hid_field *field,
-		                        struct hid_usage *usage, __s32 value)
+			struct hid_usage *usage, __s32 value)
 {
 	struct input_dev *input = field->hidinput->input;
 	struct ntrig_data *nd = hid_get_drvdata(hid);
@@ -848,6 +897,8 @@ static int ntrig_probe(struct hid_device *hdev, const struct hid_device_id *id)
 	if (report)
 		usbhid_submit_report(hdev, report, USB_DIR_OUT);
 
+	ntrig_report_version(hdev);
+
 	ret = sysfs_create_group(&hdev->dev.kobj,
 			&ntrig_attribute_group);
 
@@ -860,7 +911,7 @@ err_free:
 static void ntrig_remove(struct hid_device *hdev)
 {
 	sysfs_remove_group(&hdev->dev.kobj,
-			&ntrig_attribute_group);
+			   &ntrig_attribute_group);
 	hid_hw_stop(hdev);
 	kfree(hid_get_drvdata(hdev));
 }