Input: wacom - add touch sensor support for Cintiq 24HD touch

Decode multitouch reports from the touch sensor of the Cintiq 24HD
touch.

Signed-off-by: Jason Gerecke <killertofu@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/input/tablet/wacom_sys.c b/drivers/input/tablet/wacom_sys.c
index 8b89e15..2c1e12b 100644 (file)
--- a/drivers/input/tablet/wacom_sys.c
+++ b/drivers/input/tablet/wacom_sys.c
@@ -391,7 +391,7 @@ static int wacom_parse_hid(struct usb_interface *intf,
                                                        features->pktlen = WACOM_PKGLEN_TPC2FG;
                                                }
 
-                                               if (features->type == MTSCREEN)
+                                               if (features->type == MTSCREEN || WACOM_24HDT)
                                                        features->pktlen = WACOM_PKGLEN_MTOUCH;
 
                                                if (features->type == BAMBOO_PT) {
@@ -402,6 +402,14 @@ static int wacom_parse_hid(struct usb_interface *intf,
                                                        features->x_max =
                                                                get_unaligned_le16(&report[i + 8]);
                                                        i += 15;
+                                               } else if (features->type == WACOM_24HDT) {
+                                                       features->x_max =
+                                                               get_unaligned_le16(&report[i + 3]);
+                                                       features->x_phy =
+                                                               get_unaligned_le16(&report[i + 8]);
+                                                       features->unit = report[i - 1];
+                                                       features->unitExpo = report[i - 3];
+                                                       i += 12;
                                                } else {
                                                        features->x_max =
                                                                get_unaligned_le16(&report[i + 3]);
@@ -434,6 +442,12 @@ static int wacom_parse_hid(struct usb_interface *intf,
                                                        features->y_phy =
                                                                get_unaligned_le16(&report[i + 6]);
                                                        i += 7;
+                                               } else if (type == WACOM_24HDT) {
+                                                       features->y_max =
+                                                               get_unaligned_le16(&report[i + 3]);
+                                                       features->y_phy =
+                                                               get_unaligned_le16(&report[i - 2]);
+                                                       i += 7;
                                                } else if (type == BAMBOO_PT) {
                                                        features->y_phy =
                                                                get_unaligned_le16(&report[i + 3]);
@@ -541,6 +555,9 @@ static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_feat
                        /* MT Tablet PC touch */
                        return wacom_set_device_mode(intf, 3, 4, 4);
                }
+               else if (features->type == WACOM_24HDT) {
+                       return wacom_set_device_mode(intf, 18, 3, 2);
+               }
        } else if (features->device_type == BTN_TOOL_PEN) {
                if (features->type <= BAMBOO_PT && features->type != WIRELESS) {
                        return wacom_set_device_mode(intf, 2, 2, 2);

diff --git a/drivers/input/tablet/wacom_wac.c b/drivers/input/tablet/wacom_wac.c
index 21d1f4e..aa60101 100644 (file)
--- a/drivers/input/tablet/wacom_wac.c
+++ b/drivers/input/tablet/wacom_wac.c
@@ -806,6 +806,70 @@ static int find_slot_from_contactid(struct wacom_wac *wacom, int contactid)
        return -1;
 }
 
+static int int_dist(int x1, int y1, int x2, int y2)
+{
+       int x = x2 - x1;
+       int y = y2 - y1;
+
+       return int_sqrt(x*x + y*y);
+}
+
+static int wacom_24hdt_irq(struct wacom_wac *wacom)
+{
+       struct input_dev *input = wacom->input;
+       char *data = wacom->data;
+       int i;
+       int current_num_contacts = data[61];
+       int contacts_to_send = 0;
+
+       /*
+        * First packet resets the counter since only the first
+        * packet in series will have non-zero current_num_contacts.
+        */
+       if (current_num_contacts)
+               wacom->num_contacts_left = current_num_contacts;
+
+       /* There are at most 4 contacts per packet */
+       contacts_to_send = min(4, wacom->num_contacts_left);
+
+       for (i = 0; i < contacts_to_send; i++) {
+               int offset = (WACOM_BYTES_PER_24HDT_PACKET * i) + 1;
+               bool touch = data[offset] & 0x1 && !wacom->shared->stylus_in_proximity;
+               int id = data[offset + 1];
+               int slot = find_slot_from_contactid(wacom, id);
+
+               if (slot < 0)
+                       continue;
+               input_mt_slot(input, slot);
+               input_mt_report_slot_state(input, MT_TOOL_FINGER, touch);
+
+               if (touch) {
+                       int t_x = le16_to_cpup((__le16 *)&data[offset + 2]);
+                       int c_x = le16_to_cpup((__le16 *)&data[offset + 4]);
+                       int t_y = le16_to_cpup((__le16 *)&data[offset + 6]);
+                       int c_y = le16_to_cpup((__le16 *)&data[offset + 8]);
+                       int w = le16_to_cpup((__le16 *)&data[offset + 10]);
+                       int h = le16_to_cpup((__le16 *)&data[offset + 12]);
+
+                       input_report_abs(input, ABS_MT_POSITION_X, t_x);
+                       input_report_abs(input, ABS_MT_POSITION_Y, t_y);
+                       input_report_abs(input, ABS_MT_TOUCH_MAJOR, min(w,h));
+                       input_report_abs(input, ABS_MT_WIDTH_MAJOR, min(w, h) + int_dist(t_x, t_y, c_x, c_y));
+                       input_report_abs(input, ABS_MT_WIDTH_MINOR, min(w, h));
+                       input_report_abs(input, ABS_MT_ORIENTATION, w > h);
+               }
+               wacom->slots[slot] = touch ? id : -1;
+       }
+
+       input_mt_report_pointer_emulation(input, true);
+
+       wacom->num_contacts_left -= contacts_to_send;
+       if (wacom->num_contacts_left <= 0)
+               wacom->num_contacts_left = 0;
+
+       return 1;
+}
+
 static int wacom_mt_touch(struct wacom_wac *wacom)
 {
        struct input_dev *input = wacom->input;
@@ -1255,6 +1319,10 @@ void wacom_wac_irq(struct wacom_wac *wacom_wac, size_t len)
                sync = wacom_intuos_irq(wacom_wac);
                break;
 
+       case WACOM_24HDT:
+               sync = wacom_24hdt_irq(wacom_wac);
+               break;
+
        case INTUOS5S:
        case INTUOS5:
        case INTUOS5L:
@@ -1576,6 +1644,15 @@ int wacom_setup_input_capabilities(struct input_dev *input_dev,
                __set_bit(INPUT_PROP_POINTER, input_dev->propbit);
                break;
 
+       case WACOM_24HDT:
+               if (features->device_type == BTN_TOOL_FINGER) {
+                       input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, features->x_max, 0, 0);
+                       input_set_abs_params(input_dev, ABS_MT_WIDTH_MAJOR, 0, features->x_max, 0, 0);
+                       input_set_abs_params(input_dev, ABS_MT_WIDTH_MINOR, 0, features->y_max, 0, 0);
+                       input_set_abs_params(input_dev, ABS_MT_ORIENTATION, 0, 1, 0, 0);
+               }
+               /* fall through */
+
        case MTSCREEN:
                if (features->device_type == BTN_TOOL_FINGER) {
                        wacom_wac->slots = kmalloc(features->touch_max *
@@ -1870,8 +1947,11 @@ 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_0xF8 =
-       { "Wacom Cintiq 24HD touch", WACOM_PKGLEN_INTUOS,   104480, 65600, 2047,
-         63, WACOM_24HD, WACOM_INTUOS3_RES, WACOM_INTUOS3_RES };
+       { "Wacom Cintiq 24HD touch", WACOM_PKGLEN_INTUOS,   104480, 65600, 2047, /* Pen */
+         63, WACOM_24HD, WACOM_INTUOS3_RES, WACOM_INTUOS3_RES, .oVid = USB_VENDOR_ID_WACOM, .oPid = 0xf6 };
+static const struct wacom_features wacom_features_0xF6 =
+       { "Wacom Cintiq 24HD touch", .type = WACOM_24HDT, /* Touch */
+         .oVid = USB_VENDOR_ID_WACOM, .oPid = 0xf8, .touch_max = 10 };
 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 };
@@ -2114,6 +2194,7 @@ const struct usb_device_id wacom_ids[] = {
        { USB_DEVICE_WACOM(0x47) },
        { USB_DEVICE_WACOM(0xF4) },
        { USB_DEVICE_WACOM(0xF8) },
+       { USB_DEVICE_WACOM(0xF6) },
        { USB_DEVICE_WACOM(0xFA) },
        { USB_DEVICE_LENOVO(0x6004) },
        { }

diff --git a/drivers/input/tablet/wacom_wac.h b/drivers/input/tablet/wacom_wac.h
index 3f926ec..345f1e7 100644 (file)
--- a/drivers/input/tablet/wacom_wac.h
+++ b/drivers/input/tablet/wacom_wac.h
@@ -29,6 +29,7 @@
 
 /* wacom data size per MT contact */
 #define WACOM_BYTES_PER_MT_PACKET      11
+#define WACOM_BYTES_PER_24HDT_PACKET   14
 
 /* device IDs */
 #define STYLUS_DEVICE_ID       0x02
@@ -49,6 +50,7 @@
 #define WACOM_REPORT_TPCHID            15
 #define WACOM_REPORT_TPCST             16
 #define WACOM_REPORT_TPC1FGE           18
+#define WACOM_REPORT_24HDT             1
 
 /* device quirks */
 #define WACOM_QUIRK_MULTI_INPUT                0x0001
@@ -81,6 +83,7 @@ enum {
        WACOM_MO,
        WIRELESS,
        BAMBOO_PT,
+       WACOM_24HDT,
        TABLETPC,   /* add new TPC below */
        TABLETPCE,
        TABLETPC2FG,