1 files changed, 160 insertions, 31 deletions

diff --git a/drivers/hid/hid-lenovo.c b/drivers/hid/hid-lenovo.c
index 149a3c74346b..a7d9ca02779e 100644
--- a/drivers/hid/hid-lenovo.c
+++ b/drivers/hid/hid-lenovo.c
@@ -32,11 +32,20 @@
 #include <linux/leds.h>
 #include <linux/workqueue.h>
 
+#include <linux/platform_profile.h>
+
 #include "hid-ids.h"
 
 /* Userspace expects F20 for mic-mute KEY_MICMUTE does not work */
 #define LENOVO_KEY_MICMUTE KEY_F20
 
+/* HID raw events for ThinkPad X12 Tabs*/
+#define TP_X12_RAW_HOTKEY_FN_F4		0x00020003
+#define TP_X12_RAW_HOTKEY_FN_F8		0x38001003
+#define TP_X12_RAW_HOTKEY_FN_F10	0x00000803
+#define TP_X12_RAW_HOTKEY_FN_F12	0x00000403
+#define TP_X12_RAW_HOTKEY_FN_SPACE	0x18001003
+
 struct lenovo_drvdata {
 	u8 led_report[3]; /* Must be first for proper alignment */
 	int led_state;
@@ -54,10 +63,10 @@ struct lenovo_drvdata {
 	/* 0: Up
 	 * 1: Down (undecided)
 	 * 2: Scrolling
-	 * 3: Patched firmware, disable workaround
 	 */
 	u8 middlebutton_state;
 	bool fn_lock;
+	bool middleclick_workaround_cptkbd;
 };
 
 #define map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, EV_KEY, (c))
@@ -71,6 +80,14 @@ struct lenovo_drvdata {
 #define TP10UBKBD_LED_OFF		1
 #define TP10UBKBD_LED_ON		2
 
+/* Function to report raw_events as key events*/
+static inline void report_key_event(struct input_dev *input, int keycode)
+{
+	input_report_key(input, keycode, 1);
+	input_report_key(input, keycode, 0);
+	input_sync(input);
+}
+
 static int lenovo_led_set_tp10ubkbd(struct hid_device *hdev, u8 led_code,
 				    enum led_brightness value)
 {
@@ -133,7 +150,7 @@ static const __u8 lenovo_tpIIbtkbd_need_fixup_collection[] = {
 	0x81, 0x01,		/*   Input (Const,Array,Abs,No Wrap,Linear,Preferred State,No Null Position) */
 };
 
-static __u8 *lenovo_report_fixup(struct hid_device *hdev, __u8 *rdesc,
+static const __u8 *lenovo_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 		unsigned int *rsize)
 {
 	switch (hdev->product) {
@@ -472,7 +489,10 @@ static int lenovo_input_mapping(struct hid_device *hdev,
 	case USB_DEVICE_ID_LENOVO_TP10UBKBD:
 		return lenovo_input_mapping_tp10_ultrabook_kbd(hdev, hi, field,
 							       usage, bit, max);
+	case USB_DEVICE_ID_LENOVO_X12_TAB:
+	case USB_DEVICE_ID_LENOVO_X12_TAB2:
 	case USB_DEVICE_ID_LENOVO_X1_TAB:
+	case USB_DEVICE_ID_LENOVO_X1_TAB3:
 		return lenovo_input_mapping_x1_tab_kbd(hdev, hi, field, usage, bit, max);
 	default:
 		return 0;
@@ -555,7 +575,7 @@ static ssize_t attr_fn_lock_show(struct device *dev,
 	struct hid_device *hdev = to_hid_device(dev);
 	struct lenovo_drvdata *data = hid_get_drvdata(hdev);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n", data->fn_lock);
+	return sysfs_emit(buf, "%u\n", data->fn_lock);
 }
 
 static ssize_t attr_fn_lock_store(struct device *dev,
@@ -581,8 +601,11 @@ static ssize_t attr_fn_lock_store(struct device *dev,
 	case USB_DEVICE_ID_LENOVO_TPIIBTKBD:
 		lenovo_features_set_cptkbd(hdev);
 		break;
+	case USB_DEVICE_ID_LENOVO_X12_TAB:
+	case USB_DEVICE_ID_LENOVO_X12_TAB2:
 	case USB_DEVICE_ID_LENOVO_TP10UBKBD:
 	case USB_DEVICE_ID_LENOVO_X1_TAB:
+	case USB_DEVICE_ID_LENOVO_X1_TAB3:
 		ret = lenovo_led_set_tp10ubkbd(hdev, TP10UBKBD_FN_LOCK_LED, value);
 		if (ret)
 			return ret;
@@ -599,8 +622,7 @@ static ssize_t attr_sensitivity_show_cptkbd(struct device *dev,
 	struct hid_device *hdev = to_hid_device(dev);
 	struct lenovo_drvdata *cptkbd_data = hid_get_drvdata(hdev);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n",
-		cptkbd_data->sensitivity);
+	return sysfs_emit(buf, "%u\n", cptkbd_data->sensitivity);
 }
 
 static ssize_t attr_sensitivity_store_cptkbd(struct device *dev,
@@ -621,6 +643,36 @@ static ssize_t attr_sensitivity_store_cptkbd(struct device *dev,
 	return count;
 }
 
+static ssize_t attr_middleclick_workaround_show_cptkbd(struct device *dev,
+		struct device_attribute *attr,
+		char *buf)
+{
+	struct hid_device *hdev = to_hid_device(dev);
+	struct lenovo_drvdata *cptkbd_data = hid_get_drvdata(hdev);
+
+	return sysfs_emit(buf, "%u\n",
+			  cptkbd_data->middleclick_workaround_cptkbd);
+}
+
+static ssize_t attr_middleclick_workaround_store_cptkbd(struct device *dev,
+		struct device_attribute *attr,
+		const char *buf,
+		size_t count)
+{
+	struct hid_device *hdev = to_hid_device(dev);
+	struct lenovo_drvdata *cptkbd_data = hid_get_drvdata(hdev);
+	int value;
+
+	if (kstrtoint(buf, 10, &value))
+		return -EINVAL;
+	if (value < 0 || value > 1)
+		return -EINVAL;
+
+	cptkbd_data->middleclick_workaround_cptkbd = !!value;
+
+	return count;
+}
+
 
 static struct device_attribute dev_attr_fn_lock =
 	__ATTR(fn_lock, S_IWUSR | S_IRUGO,
@@ -632,10 +684,16 @@ static struct device_attribute dev_attr_sensitivity_cptkbd =
 			attr_sensitivity_show_cptkbd,
 			attr_sensitivity_store_cptkbd);
 
+static struct device_attribute dev_attr_middleclick_workaround_cptkbd =
+	__ATTR(middleclick_workaround, S_IWUSR | S_IRUGO,
+			attr_middleclick_workaround_show_cptkbd,
+			attr_middleclick_workaround_store_cptkbd);
+
 
 static struct attribute *lenovo_attributes_cptkbd[] = {
 	&dev_attr_fn_lock.attr,
 	&dev_attr_sensitivity_cptkbd.attr,
+	&dev_attr_middleclick_workaround_cptkbd.attr,
 	NULL
 };
 
@@ -643,6 +701,59 @@ static const struct attribute_group lenovo_attr_group_cptkbd = {
 	.attrs = lenovo_attributes_cptkbd,
 };
 
+/* Function to handle Lenovo Thinkpad TAB X12's HID raw inputs for fn keys*/
+static int lenovo_raw_event_TP_X12_tab(struct hid_device *hdev, u32 raw_data)
+{
+	struct hid_input *hidinput;
+	struct input_dev *input = NULL;
+
+	/* Iterate through all associated input devices */
+	list_for_each_entry(hidinput, &hdev->inputs, list) {
+		input = hidinput->input;
+		if (!input)
+			continue;
+
+		switch (raw_data) {
+			/* fn-F20 being used here for MIC mute*/
+		case TP_X12_RAW_HOTKEY_FN_F4:
+			report_key_event(input, LENOVO_KEY_MICMUTE);
+			return 1;
+		/* Power-mode or Airplane mode will be called based on the device*/
+		case TP_X12_RAW_HOTKEY_FN_F8:
+			/*
+			 * TP X12 TAB uses Fn-F8 calls Airplanemode
+			 * Whereas TP X12 TAB2 uses Fn-F8 for toggling
+			 * Power modes
+			 */
+			if (hdev->product == USB_DEVICE_ID_LENOVO_X12_TAB) {
+				report_key_event(input, KEY_RFKILL);
+				return 1;
+			} else {
+				platform_profile_cycle();
+				return 1;
+			}
+			return 0;
+		case TP_X12_RAW_HOTKEY_FN_F10:
+			/* TAB1 has PICKUP Phone and TAB2 use Snipping tool*/
+			(hdev->product == USB_DEVICE_ID_LENOVO_X12_TAB) ?
+			report_key_event(input, KEY_PICKUP_PHONE) :
+			report_key_event(input, KEY_SELECTIVE_SCREENSHOT);
+			return 1;
+		case TP_X12_RAW_HOTKEY_FN_F12:
+			/* BookMarks/STAR key*/
+			report_key_event(input, KEY_BOOKMARKS);
+			return 1;
+		case TP_X12_RAW_HOTKEY_FN_SPACE:
+			/* Keyboard LED backlight toggle*/
+			report_key_event(input, KEY_KBDILLUMTOGGLE);
+			return 1;
+		default:
+			break;
+		}
+	}
+	return 0;
+}
+
 static int lenovo_raw_event(struct hid_device *hdev,
 			struct hid_report *report, u8 *data, int size)
 {
@@ -660,6 +771,15 @@ static int lenovo_raw_event(struct hid_device *hdev,
 		data[2] = 0x01;
 	}
 
+	/*
+	 * Lenovo TP X12 Tab KBD's Fn+XX is HID raw data defined. Report ID is 0x03
+	 * e.g.: Raw data received for MIC mute is 0x00020003.
+	 */
+	if (unlikely((hdev->product == USB_DEVICE_ID_LENOVO_X12_TAB
+			|| hdev->product == USB_DEVICE_ID_LENOVO_X12_TAB2)
+			&& size >= 3 && report->id == 0x03))
+		return lenovo_raw_event_TP_X12_tab(hdev, le32_to_cpu(*(u32 *)data));
+
 	return 0;
 }
 
@@ -686,23 +806,7 @@ static int lenovo_event_cptkbd(struct hid_device *hdev,
 {
 	struct lenovo_drvdata *cptkbd_data = hid_get_drvdata(hdev);
 
-	if (cptkbd_data->middlebutton_state != 3) {
-		/* REL_X and REL_Y events during middle button pressed
-		 * are only possible on patched, bug-free firmware
-		 * so set middlebutton_state to 3
-		 * to never apply workaround anymore
-		 */
-		if (hdev->product == USB_DEVICE_ID_LENOVO_CUSBKBD &&
-				cptkbd_data->middlebutton_state == 1 &&
-				usage->type == EV_REL &&
-				(usage->code == REL_X || usage->code == REL_Y)) {
-			cptkbd_data->middlebutton_state = 3;
-			/* send middle button press which was hold before */
-			input_event(field->hidinput->input,
-				EV_KEY, BTN_MIDDLE, 1);
-			input_sync(field->hidinput->input);
-		}
-
+	if (cptkbd_data->middleclick_workaround_cptkbd) {
 		/* "wheel" scroll events */
 		if (usage->type == EV_REL && (usage->code == REL_WHEEL ||
 				usage->code == REL_HWHEEL)) {
@@ -755,8 +859,11 @@ static int lenovo_event(struct hid_device *hdev, struct hid_field *field,
 	case USB_DEVICE_ID_LENOVO_TPIIUSBKBD:
 	case USB_DEVICE_ID_LENOVO_TPIIBTKBD:
 		return lenovo_event_cptkbd(hdev, field, usage, value);
+	case USB_DEVICE_ID_LENOVO_X12_TAB:
+	case USB_DEVICE_ID_LENOVO_X12_TAB2:
 	case USB_DEVICE_ID_LENOVO_TP10UBKBD:
 	case USB_DEVICE_ID_LENOVO_X1_TAB:
+	case USB_DEVICE_ID_LENOVO_X1_TAB3:
 		return lenovo_event_tp10ubkbd(hdev, field, usage, value);
 	default:
 		return 0;
@@ -789,7 +896,7 @@ static ssize_t attr_press_to_select_show_tpkbd(struct device *dev,
 	struct hid_device *hdev = to_hid_device(dev);
 	struct lenovo_drvdata *data_pointer = hid_get_drvdata(hdev);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->press_to_select);
+	return sysfs_emit(buf, "%u\n", data_pointer->press_to_select);
 }
 
 static ssize_t attr_press_to_select_store_tpkbd(struct device *dev,
@@ -819,7 +926,7 @@ static ssize_t attr_dragging_show_tpkbd(struct device *dev,
 	struct hid_device *hdev = to_hid_device(dev);
 	struct lenovo_drvdata *data_pointer = hid_get_drvdata(hdev);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->dragging);
+	return sysfs_emit(buf, "%u\n", data_pointer->dragging);
 }
 
 static ssize_t attr_dragging_store_tpkbd(struct device *dev,
@@ -849,7 +956,7 @@ static ssize_t attr_release_to_select_show_tpkbd(struct device *dev,
 	struct hid_device *hdev = to_hid_device(dev);
 	struct lenovo_drvdata *data_pointer = hid_get_drvdata(hdev);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->release_to_select);
+	return sysfs_emit(buf, "%u\n", data_pointer->release_to_select);
 }
 
 static ssize_t attr_release_to_select_store_tpkbd(struct device *dev,
@@ -879,7 +986,7 @@ static ssize_t attr_select_right_show_tpkbd(struct device *dev,
 	struct hid_device *hdev = to_hid_device(dev);
 	struct lenovo_drvdata *data_pointer = hid_get_drvdata(hdev);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->select_right);
+	return sysfs_emit(buf, "%u\n", data_pointer->select_right);
 }
 
 static ssize_t attr_select_right_store_tpkbd(struct device *dev,
@@ -909,8 +1016,7 @@ static ssize_t attr_sensitivity_show_tpkbd(struct device *dev,
 	struct hid_device *hdev = to_hid_device(dev);
 	struct lenovo_drvdata *data_pointer = hid_get_drvdata(hdev);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n",
-		data_pointer->sensitivity);
+	return sysfs_emit(buf, "%u\n", data_pointer->sensitivity);
 }
 
 static ssize_t attr_sensitivity_store_tpkbd(struct device *dev,
@@ -938,8 +1044,7 @@ static ssize_t attr_press_speed_show_tpkbd(struct device *dev,
 	struct hid_device *hdev = to_hid_device(dev);
 	struct lenovo_drvdata *data_pointer = hid_get_drvdata(hdev);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n",
-		data_pointer->press_speed);
+	return sysfs_emit(buf, "%u\n", data_pointer->press_speed);
 }
 
 static ssize_t attr_press_speed_store_tpkbd(struct device *dev,
@@ -1037,8 +1142,11 @@ static int lenovo_led_brightness_set(struct led_classdev *led_cdev,
 	case USB_DEVICE_ID_LENOVO_TPKBD:
 		lenovo_led_set_tpkbd(hdev);
 		break;
+	case USB_DEVICE_ID_LENOVO_X12_TAB:
+	case USB_DEVICE_ID_LENOVO_X12_TAB2:
 	case USB_DEVICE_ID_LENOVO_TP10UBKBD:
 	case USB_DEVICE_ID_LENOVO_X1_TAB:
+	case USB_DEVICE_ID_LENOVO_X1_TAB3:
 		ret = lenovo_led_set_tp10ubkbd(hdev, tp10ubkbd_led[led_nr], value);
 		break;
 	}
@@ -1166,6 +1274,7 @@ static int lenovo_probe_cptkbd(struct hid_device *hdev)
 	cptkbd_data->middlebutton_state = 0;
 	cptkbd_data->fn_lock = true;
 	cptkbd_data->sensitivity = 0x05;
+	cptkbd_data->middleclick_workaround_cptkbd = true;
 	lenovo_features_set_cptkbd(hdev);
 
 	ret = sysfs_create_group(&hdev->dev.kobj, &lenovo_attr_group_cptkbd);
@@ -1221,8 +1330,15 @@ static int lenovo_probe_tp10ubkbd(struct hid_device *hdev)
 	 * We cannot read the state, only set it, so we force it to on here
 	 * (which should be a no-op) to make sure that our state matches the
 	 * keyboard's FN-lock state. This is the same as what Windows does.
+	 *
+	 * For X12 TAB and TAB2, the default windows behaviour Fn-lock Off.
+	 * Adding additional check to ensure the behaviour in case of
+	 * Thinkpad X12 Tabs.
 	 */
-	data->fn_lock = true;
+
+	data->fn_lock = !(hdev->product == USB_DEVICE_ID_LENOVO_X12_TAB ||
+			hdev->product == USB_DEVICE_ID_LENOVO_X12_TAB2);
+
 	lenovo_led_set_tp10ubkbd(hdev, TP10UBKBD_FN_LOCK_LED, data->fn_lock);
 
 	ret = sysfs_create_group(&hdev->dev.kobj, &lenovo_attr_group_tp10ubkbd);
@@ -1266,8 +1382,11 @@ static int lenovo_probe(struct hid_device *hdev,
 	case USB_DEVICE_ID_LENOVO_TPIIBTKBD:
 		ret = lenovo_probe_cptkbd(hdev);
 		break;
+	case USB_DEVICE_ID_LENOVO_X12_TAB:
+	case USB_DEVICE_ID_LENOVO_X12_TAB2:
 	case USB_DEVICE_ID_LENOVO_TP10UBKBD:
 	case USB_DEVICE_ID_LENOVO_X1_TAB:
+	case USB_DEVICE_ID_LENOVO_X1_TAB3:
 		ret = lenovo_probe_tp10ubkbd(hdev);
 		break;
 	default:
@@ -1352,8 +1471,11 @@ static void lenovo_remove(struct hid_device *hdev)
 	case USB_DEVICE_ID_LENOVO_TPIIBTKBD:
 		lenovo_remove_cptkbd(hdev);
 		break;
+	case USB_DEVICE_ID_LENOVO_X12_TAB:
+	case USB_DEVICE_ID_LENOVO_X12_TAB2:
 	case USB_DEVICE_ID_LENOVO_TP10UBKBD:
 	case USB_DEVICE_ID_LENOVO_X1_TAB:
+	case USB_DEVICE_ID_LENOVO_X1_TAB3:
 		lenovo_remove_tp10ubkbd(hdev);
 		break;
 	}
@@ -1403,6 +1525,12 @@ static const struct hid_device_id lenovo_devices[] = {
 	 */
 	{ HID_DEVICE(BUS_USB, HID_GROUP_GENERIC,
 		     USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_X1_TAB) },
+	{ HID_DEVICE(BUS_USB, HID_GROUP_GENERIC,
+		     USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_X1_TAB3) },
+	{ HID_DEVICE(BUS_USB, HID_GROUP_GENERIC,
+		     USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_X12_TAB) },
+	{ HID_DEVICE(BUS_USB, HID_GROUP_GENERIC,
+		     USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_X12_TAB2) },
 	{ }
 };
 
@@ -1424,4 +1552,5 @@ static struct hid_driver lenovo_driver = {
 };
 module_hid_driver(lenovo_driver);
 
+MODULE_DESCRIPTION("HID driver for IBM/Lenovo");
 MODULE_LICENSE("GPL");