HID: wacom: support named keys on older devices

Some of the missing key codes needed by older Wacom devices
were added with commit 4eb220cb35a9 ("HID: wacom: generic: add
3 tablet touch keys"). These keys were originally reported in the
anonymous KEY_PROG* range, and they continue to do so so as not
to break any unknown applications that may depend on
them. We add the proper key codes that are now available and
track the state of the touch button in the pad report.

Signed-off-by: Aaron Armstrong Skomra <aaron.skomra@wacom.com>
Link: https://gitlab.freedesktop.org/libinput/libinput/merge_requests/155
Link: linuxwacom/xf86-input-wacom#46

4.5/wacom_wac.c

@@ -491,6 +491,8 @@ static int wacom_intuos_pad(struct wacom_wac *wacom)
 	int ring1 = 0, ring2 = 0;
 	int strip1 = 0, strip2 = 0;
 	bool prox = false;
+	bool wrench = false, keyboard = false, mute_touch = false, menu = false,
+	     info = false;
 
 	/* pad packets. Works as a second tool and is always in prox */
 	if (!(data[0] == WACOM_REPORT_INTUOSPAD || data[0] == WACOM_REPORT_INTUOS5PAD ||
@@ -520,10 +522,32 @@ static int wacom_intuos_pad(struct wacom_wac *wacom)
 		keys = ((data[3] & 0x1C) ? 1<<2 : 0) |
 		       ((data[4] & 0xE0) ? 1<<1 : 0) |
 		       ((data[4] & 0x07) ? 1<<0 : 0);
+		keyboard = !!(data[4] & 0xE0);
+		info = !!(data[3] & 0x1C);
+
+		if (features->oPid) {
+			mute_touch = !!(data[4] & 0x07);
+			if (mute_touch)
+				wacom->shared->is_touch_on =
+					!wacom->shared->is_touch_on;
+		} else {
+			wrench = !!(data[4] & 0x07);
+		}
 	} else if (features->type == WACOM_27QHD) {
 		nkeys = 3;
 		keys = data[2] & 0x07;
 
+		wrench = !!(data[2] & 0x01);
+		keyboard = !!(data[2] & 0x02);
+
+		if (features->oPid) {
+			mute_touch = !!(data[2] & 0x04);
+			if (mute_touch)
+				wacom->shared->is_touch_on =
+					!wacom->shared->is_touch_on;
+		} else {
+			menu = !!(data[2] & 0x04);
+		}
 		input_report_abs(input, ABS_X, be16_to_cpup((__be16 *)&data[4]));
 		input_report_abs(input, ABS_Y, be16_to_cpup((__be16 *)&data[6]));
 		input_report_abs(input, ABS_Z, be16_to_cpup((__be16 *)&data[8]));
@@ -569,6 +593,9 @@ static int wacom_intuos_pad(struct wacom_wac *wacom)
 			if (features->type == WACOM_22HD) {
 				nkeys = 3;
 				keys = data[9] & 0x07;
+
+				info = !!(data[9] & 0x01);
+				wrench = !!(data[9] & 0x02);
 			}
 		} else {
 			buttons = ((data[6] & 0x10) << 5)  |
@@ -588,6 +615,18 @@ static int wacom_intuos_pad(struct wacom_wac *wacom)
 	for (i = 0; i < nkeys; i++)
 		input_report_key(input, KEY_PROG1 + i, keys & (1 << i));
 
+	input_report_key(input, KEY_BUTTONCONFIG, wrench);
+	input_report_key(input, KEY_ONSCREEN_KEYBOARD, keyboard);
+	input_report_key(input, KEY_CONTROLPANEL, menu);
+	input_report_key(input, KEY_INFO, info);
+
+	if (wacom->shared && wacom->shared->touch_input) {
+		input_report_switch(wacom->shared->touch_input,
+				    SW_MUTE_DEVICE,
+				    !wacom->shared->is_touch_on);
+		input_sync(wacom->shared->touch_input);
+	}
+
 	input_report_abs(input, ABS_RX, strip1);
 	input_report_abs(input, ABS_RY, strip2);
 
@@ -1490,6 +1529,12 @@ static int wacom_24hdt_irq(struct wacom_wac *wacom)
 	int byte_per_packet = WACOM_BYTES_PER_24HDT_PACKET;
 	int y_offset = 2;
 
+	if (wacom->shared->has_mute_touch_switch &&
+	    !wacom->shared->is_touch_on) {
+		if (!wacom->shared->touch_down)
+			return 0;
+	}
+
 	if (wacom->features.type == WACOM_27QHDT) {
 		current_num_contacts = data[63];
 		num_contacts_left = 10;
@@ -3823,6 +3868,14 @@ int wacom_setup_touch_input_capabilities(struct input_dev *input_dev,
 		/* fall through */
 
 	case WACOM_27QHDT:
+		if (wacom_wac->shared->touch->product == 0x32C ||
+		    wacom_wac->shared->touch->product == 0xF6) {
+			input_dev->evbit[0] |= BIT_MASK(EV_SW);
+			__set_bit(SW_MUTE_DEVICE, input_dev->swbit);
+			wacom_wac->shared->has_mute_touch_switch = true;
+		}
+		/* fall through */
+
 	case MTSCREEN:
 	case MTTPC:
 	case MTTPC_B:
@@ -4058,6 +4111,12 @@ int wacom_setup_pad_input_capabilities(struct input_dev *input_dev,
 		__set_bit(KEY_PROG2, input_dev->keybit);
 		__set_bit(KEY_PROG3, input_dev->keybit);
 
+		__set_bit(KEY_ONSCREEN_KEYBOARD, input_dev->keybit);
+		__set_bit(KEY_INFO, input_dev->keybit);
+
+		if (!features->oPid)
+			__set_bit(KEY_BUTTONCONFIG, input_dev->keybit);
+
 		input_set_abs_params(input_dev, ABS_WHEEL, 0, 71, 0, 0);
 		input_set_abs_params(input_dev, ABS_THROTTLE, 0, 71, 0, 0);
 		break;
@@ -4066,6 +4125,12 @@ int wacom_setup_pad_input_capabilities(struct input_dev *input_dev,
 		__set_bit(KEY_PROG1, input_dev->keybit);
 		__set_bit(KEY_PROG2, input_dev->keybit);
 		__set_bit(KEY_PROG3, input_dev->keybit);
+
+		__set_bit(KEY_ONSCREEN_KEYBOARD, input_dev->keybit);
+		__set_bit(KEY_BUTTONCONFIG, input_dev->keybit);
+
+		if (!features->oPid)
+			__set_bit(KEY_CONTROLPANEL, input_dev->keybit);
 		input_set_abs_params(input_dev, ABS_X, -2048, 2048, 0, 0);
 		input_abs_set_res(input_dev, ABS_X, 1024); /* points/g */
 		input_set_abs_params(input_dev, ABS_Y, -2048, 2048, 0, 0);
@@ -4079,6 +4144,9 @@ int wacom_setup_pad_input_capabilities(struct input_dev *input_dev,
 		__set_bit(KEY_PROG1, input_dev->keybit);
 		__set_bit(KEY_PROG2, input_dev->keybit);
 		__set_bit(KEY_PROG3, input_dev->keybit);
+
+		__set_bit(KEY_BUTTONCONFIG, input_dev->keybit);
+		__set_bit(KEY_INFO, input_dev->keybit);
 		/* fall through */
 
 	case WACOM_21UX2: