Input: wacom - add support for Cintiq 24HD

Adds support for the Cintiq 24HD. There are two quirks about this
model that haven't been seen in prior tablets. First, a second
touch ring is present on this display; it is being exposed via the
ABS_THROTTLE axis. Second, three capacitive buttons at the top of
the unit are available; though physically a touch strip, we report
the use of these buttons with generic KEY_ events.

Signed-off-by: Jason Gerecke <killertofu@gmail.com>
Reviewed-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

2 files changed, 77 insertions, 1 deletions

diff --git a/drivers/input/tablet/wacom_wac.c b/drivers/input/tablet/wacom_wac.c
index ecfcbc8144dc..a22e7789d91b 100644
--- a/drivers/input/tablet/wacom_wac.c
+++ b/drivers/input/tablet/wacom_wac.c
@@ -452,7 +452,7 @@ static void wacom_intuos_general(struct wacom_wac *wacom)
         if ((data[1] & 0xb8) == 0xa0) {
                 t = (data[6] << 2) | ((data[7] >> 6) & 3);
                 if ((features->type >= INTUOS4S && features->type <= INTUOS4L) ||
-                    features->type == WACOM_21UX2) {
+                    features->type == WACOM_21UX2 || features->type == WACOM_24HD) {
                         t = (t << 1) | (data[1] & 1);
                 }
                 input_report_abs(input, ABS_PRESSURE, t);
@@ -519,6 +519,56 @@ static int wacom_intuos_irq(struct wacom_wac *wacom)
                                 input_report_key(input, wacom->tool[1], 0);
                                 input_report_abs(input, ABS_MISC, 0);
                         }
+                } else if (features->type == WACOM_24HD) {
+                        input_report_key(input, BTN_0, (data[6] & 0x01));
+                        input_report_key(input, BTN_1, (data[6] & 0x02));
+                        input_report_key(input, BTN_2, (data[6] & 0x04));
+                        input_report_key(input, BTN_3, (data[6] & 0x08));
+                        input_report_key(input, BTN_4, (data[6] & 0x10));
+                        input_report_key(input, BTN_5, (data[6] & 0x20));
+                        input_report_key(input, BTN_6, (data[6] & 0x40));
+                        input_report_key(input, BTN_7, (data[6] & 0x80));
+                        input_report_key(input, BTN_8, (data[8] & 0x01));
+                        input_report_key(input, BTN_9, (data[8] & 0x02));
+                        input_report_key(input, BTN_A, (data[8] & 0x04));
+                        input_report_key(input, BTN_B, (data[8] & 0x08));
+                        input_report_key(input, BTN_C, (data[8] & 0x10));
+                        input_report_key(input, BTN_X, (data[8] & 0x20));
+                        input_report_key(input, BTN_Y, (data[8] & 0x40));
+                        input_report_key(input, BTN_Z, (data[8] & 0x80));
+
+                        /*
+                         * Three "buttons" are available on the 24HD which are
+                         * physically implemented as a touchstrip. Each button
+                         * is approximately 3 bits wide with a 2 bit spacing.
+                         * The raw touchstrip bits are stored at:
+                         *    ((data[3] & 0x1f) << 8) | data[4])
+                         */
+                        input_report_key(input, KEY_PROG1, data[4] & 0x07);
+                        input_report_key(input, KEY_PROG2, data[4] & 0xE0);
+                        input_report_key(input, KEY_PROG3, data[3] & 0x1C);
+
+                        if (data[1] & 0x80) {
+                                input_report_abs(input, ABS_WHEEL, (data[1] & 0x7f));
+                        } else {
+                                /* Out of proximity, clear wheel value. */
+                                input_report_abs(input, ABS_WHEEL, 0);
+                        }
+
+                        if (data[2] & 0x80) {
+                                input_report_abs(input, ABS_THROTTLE, (data[2] & 0x7f));
+                        } else {
+                                /* Out of proximity, clear second wheel value. */
+                                input_report_abs(input, ABS_THROTTLE, 0);
+                        }
+
+                        if (data[1] | data[2] | (data[3] & 0x1f) | data[4] | data[6] | data[8]) {
+                                input_report_key(input, wacom->tool[1], 1);
+                                input_report_abs(input, ABS_MISC, PAD_DEVICE_ID);
+                        } else {
+                                input_report_key(input, wacom->tool[1], 0);
+                                input_report_abs(input, ABS_MISC, 0);
+                        }
                 } else {
                         if (features->type == WACOM_21UX2) {
                                 input_report_key(input, BTN_0, (data[5] & 0x01));
@@ -1019,6 +1069,7 @@ void wacom_wac_irq(struct wacom_wac *wacom_wac, size_t len)
         case CINTIQ:
         case WACOM_BEE:
         case WACOM_21UX2:
+        case WACOM_24HD:
                 sync = wacom_intuos_irq(wacom_wac);
                 break;
 
@@ -1174,6 +1225,26 @@ void wacom_setup_input_capabilities(struct input_dev *input_dev,
                 __set_bit(INPUT_PROP_POINTER, input_dev->propbit);
                 break;
 
+        case WACOM_24HD:
+                __set_bit(BTN_A, input_dev->keybit);
+                __set_bit(BTN_B, input_dev->keybit);
+                __set_bit(BTN_C, input_dev->keybit);
+                __set_bit(BTN_X, input_dev->keybit);
+                __set_bit(BTN_Y, input_dev->keybit);
+                __set_bit(BTN_Z, input_dev->keybit);
+
+                for (i = 0; i < 10; i++)
+                        __set_bit(BTN_0 + i, input_dev->keybit);
+
+                __set_bit(KEY_PROG1, input_dev->keybit);
+                __set_bit(KEY_PROG2, input_dev->keybit);
+                __set_bit(KEY_PROG3, input_dev->keybit);
+
+                input_set_abs_params(input_dev, ABS_Z, -900, 899, 0, 0);
+                input_set_abs_params(input_dev, ABS_THROTTLE, 0, 71, 0, 0);
+                wacom_setup_cintiq(wacom_wac);
+                break;
+
         case WACOM_21UX2:
                 __set_bit(BTN_A, input_dev->keybit);
                 __set_bit(BTN_B, input_dev->keybit);
@@ -1503,6 +1574,9 @@ static const struct wacom_features wacom_features_0xBB =
 static const struct wacom_features wacom_features_0xBC =
         { "Wacom Intuos4 WL",     WACOM_PKGLEN_INTUOS,    40840, 25400, 2047,
           63, INTUOS4, WACOM_INTUOS3_RES, WACOM_INTUOS3_RES };
+static const struct wacom_features wacom_features_0xF4 =
+        { "Wacom Cintiq 24HD",    WACOM_PKGLEN_INTUOS,   104480, 65600, 2047,
+          63, WACOM_24HD, WACOM_INTUOS3_RES, WACOM_INTUOS3_RES };
 static const struct wacom_features wacom_features_0x3F =
         { "Wacom Cintiq 21UX",    WACOM_PKGLEN_INTUOS,    87200, 65600, 1023,
           63, CINTIQ, WACOM_INTUOS3_RES, WACOM_INTUOS3_RES };
@@ -1702,6 +1776,7 @@ const struct usb_device_id wacom_ids[] = {
         { USB_DEVICE_WACOM(0xE3) },
         { USB_DEVICE_WACOM(0xE6) },
         { USB_DEVICE_WACOM(0x47) },
+        { USB_DEVICE_WACOM(0xF4) },
         { USB_DEVICE_LENOVO(0x6004) },
         { }
 };
diff --git a/drivers/input/tablet/wacom_wac.h b/drivers/input/tablet/wacom_wac.h
index 27f1d1c203a1..050acaefee7d 100644
--- a/drivers/input/tablet/wacom_wac.h
+++ b/drivers/input/tablet/wacom_wac.h
@@ -59,6 +59,7 @@ enum {
         INTUOS4S,
         INTUOS4,
         INTUOS4L,
+        WACOM_24HD,
         WACOM_21UX2,
         CINTIQ,
         WACOM_BEE,