* Wacom W8001 penabled serial touchscreen driver
*
* Copyright (c) 2008 Jaya Kumar
+ * Copyright (c) 2010 Red Hat, Inc.
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive for
#define W8001_LEAD_BYTE 0x80
#define W8001_TAB_MASK 0x40
#define W8001_TAB_BYTE 0x40
+/* set in first byte of touch data packets */
+#define W8001_TOUCH_MASK (0x10 | W8001_LEAD_MASK)
+#define W8001_TOUCH_BYTE (0x10 | W8001_LEAD_BYTE)
#define W8001_QUERY_PACKET 0x20
#define W8001_CMD_START '1'
#define W8001_CMD_QUERY '*'
+#define W8001_CMD_TOUCHQUERY '%'
+
+/* length of data packets in bytes, depends on device. */
+#define W8001_PKTLEN_TOUCH93 5
+#define W8001_PKTLEN_TOUCH9A 7
+#define W8001_PKTLEN_TPCPEN 9
+#define W8001_PKTLEN_TPCCTL 11 /* control packet */
+#define W8001_PKTLEN_TOUCH2FG 13
+
+#define MAX_TRACKING_ID 0xFF /* arbitrarily chosen */
struct w8001_coord {
u8 rdy;
u8 tilt_y;
};
+/* touch query reply packet */
+struct w8001_touch_query {
+ u8 panel_res;
+ u8 capacity_res;
+ u8 sensor_id;
+ u16 x;
+ u16 y;
+};
+
/*
* Per-touchscreen data.
*/
unsigned char response[W8001_MAX_LENGTH];
unsigned char data[W8001_MAX_LENGTH];
char phys[32];
+ int type;
+ unsigned int pktlen;
+ int trkid[2];
};
static void parse_data(u8 *data, struct w8001_coord *coord)
coord->tilt_y = data[8] & 0x7F;
}
+static void parse_touch(struct w8001 *w8001)
+{
+ static int trkid;
+ struct input_dev *dev = w8001->dev;
+ unsigned char *data = w8001->data;
+ int i;
+
+ for (i = 0; i < 2; i++) {
+ input_mt_slot(dev, i);
+
+ if (data[0] & (1 << i)) {
+ int x = (data[6 * i + 1] << 7) | (data[6 * i + 2]);
+ int y = (data[6 * i + 3] << 7) | (data[6 * i + 4]);
+ /* data[5,6] and [11,12] is finger capacity */
+
+ input_report_abs(dev, ABS_MT_POSITION_X, x);
+ input_report_abs(dev, ABS_MT_POSITION_Y, y);
+ input_report_abs(dev, ABS_MT_TOOL_TYPE, MT_TOOL_FINGER);
+ if (w8001->trkid[i] < 0)
+ w8001->trkid[i] = trkid++ & MAX_TRACKING_ID;
+ } else {
+ w8001->trkid[i] = -1;
+ }
+ input_report_abs(dev, ABS_MT_TRACKING_ID, w8001->trkid[i]);
+ }
+
+ input_sync(dev);
+}
+
+static void parse_touchquery(u8 *data, struct w8001_touch_query *query)
+{
+ memset(query, 0, sizeof(*query));
+
+ query->panel_res = data[1];
+ query->sensor_id = data[2] & 0x7;
+ query->capacity_res = data[7];
+
+ query->x = data[3] << 9;
+ query->x |= data[4] << 2;
+ query->x |= (data[2] >> 5) & 0x3;
+
+ query->y = data[5] << 9;
+ query->y |= data[6] << 2;
+ query->y |= (data[2] >> 3) & 0x3;
+}
+
+static void report_pen_events(struct w8001 *w8001, struct w8001_coord *coord)
+{
+ struct input_dev *dev = w8001->dev;
+
+ /*
+ * We have 1 bit for proximity (rdy) and 3 bits for tip, side,
+ * side2/eraser. If rdy && f2 are set, this can be either pen + side2,
+ * or eraser. assume
+ * - if dev is already in proximity and f2 is toggled → pen + side2
+ * - if dev comes into proximity with f2 set → eraser
+ * If f2 disappears after assuming eraser, fake proximity out for
+ * eraser and in for pen.
+ */
+
+ if (!w8001->type) {
+ w8001->type = coord->f2 ? BTN_TOOL_RUBBER : BTN_TOOL_PEN;
+ } else if (w8001->type == BTN_TOOL_RUBBER) {
+ if (!coord->f2) {
+ input_report_abs(dev, ABS_PRESSURE, 0);
+ input_report_key(dev, BTN_TOUCH, 0);
+ input_report_key(dev, BTN_STYLUS, 0);
+ input_report_key(dev, BTN_STYLUS2, 0);
+ input_report_key(dev, BTN_TOOL_RUBBER, 0);
+ input_sync(dev);
+ w8001->type = BTN_TOOL_PEN;
+ }
+ } else {
+ input_report_key(dev, BTN_STYLUS2, coord->f2);
+ }
+
+ input_report_abs(dev, ABS_X, coord->x);
+ input_report_abs(dev, ABS_Y, coord->y);
+ input_report_abs(dev, ABS_PRESSURE, coord->pen_pressure);
+ input_report_key(dev, BTN_TOUCH, coord->tsw);
+ input_report_key(dev, BTN_STYLUS, coord->f1);
+ input_report_key(dev, w8001->type, coord->rdy);
+ input_sync(dev);
+
+ if (!coord->rdy)
+ w8001->type = 0;
+}
+
static irqreturn_t w8001_interrupt(struct serio *serio,
unsigned char data, unsigned int flags)
{
struct w8001 *w8001 = serio_get_drvdata(serio);
- struct input_dev *dev = w8001->dev;
struct w8001_coord coord;
unsigned char tmp;
}
break;
- case 8:
+ case W8001_PKTLEN_TOUCH93 - 1:
+ case W8001_PKTLEN_TOUCH9A - 1:
+ /* ignore one-finger touch packet. */
+ if (w8001->pktlen == w8001->idx)
+ w8001->idx = 0;
+ break;
+
+ /* Pen coordinates packet */
+ case W8001_PKTLEN_TPCPEN - 1:
tmp = w8001->data[0] & W8001_TAB_MASK;
if (unlikely(tmp == W8001_TAB_BYTE))
break;
+ tmp = (w8001->data[0] & W8001_TOUCH_BYTE);
+ if (tmp == W8001_TOUCH_BYTE)
+ break;
+
w8001->idx = 0;
parse_data(w8001->data, &coord);
- input_report_abs(dev, ABS_X, coord.x);
- input_report_abs(dev, ABS_Y, coord.y);
- input_report_abs(dev, ABS_PRESSURE, coord.pen_pressure);
- input_report_key(dev, BTN_TOUCH, coord.tsw);
- input_sync(dev);
+ report_pen_events(w8001, &coord);
break;
- case 10:
+ /* control packet */
+ case W8001_PKTLEN_TPCCTL - 1:
+ tmp = (w8001->data[0] & W8001_TOUCH_MASK);
+ if (tmp == W8001_TOUCH_BYTE)
+ break;
+
w8001->idx = 0;
memcpy(w8001->response, w8001->data, W8001_MAX_LENGTH);
w8001->response_type = W8001_QUERY_PACKET;
complete(&w8001->cmd_done);
break;
+
+ /* 2 finger touch packet */
+ case W8001_PKTLEN_TOUCH2FG - 1:
+ w8001->idx = 0;
+ parse_touch(w8001);
+ break;
}
return IRQ_HANDLED;
input_set_abs_params(dev, ABS_TILT_X, 0, coord.tilt_x, 0, 0);
input_set_abs_params(dev, ABS_TILT_Y, 0, coord.tilt_y, 0, 0);
+ error = w8001_command(w8001, W8001_CMD_TOUCHQUERY, true);
+ if (!error) {
+ struct w8001_touch_query touch;
+
+ parse_touchquery(w8001->response, &touch);
+
+ switch (touch.sensor_id) {
+ case 0:
+ case 2:
+ w8001->pktlen = W8001_PKTLEN_TOUCH93;
+ break;
+ case 1:
+ case 3:
+ case 4:
+ w8001->pktlen = W8001_PKTLEN_TOUCH9A;
+ break;
+ case 5:
+ w8001->pktlen = W8001_PKTLEN_TOUCH2FG;
+
+ input_mt_create_slots(dev, 2);
+ input_set_abs_params(dev, ABS_MT_TRACKING_ID,
+ 0, MAX_TRACKING_ID, 0, 0);
+ input_set_abs_params(dev, ABS_MT_POSITION_X,
+ 0, touch.x, 0, 0);
+ input_set_abs_params(dev, ABS_MT_POSITION_Y,
+ 0, touch.y, 0, 0);
+ input_set_abs_params(dev, ABS_MT_TOOL_TYPE,
+ 0, 0, 0, 0);
+ break;
+ }
+ }
+
return w8001_command(w8001, W8001_CMD_START, false);
}
w8001->serio = serio;
w8001->id = serio->id.id;
w8001->dev = input_dev;
+ w8001->trkid[0] = w8001->trkid[1] = -1;
init_completion(&w8001->cmd_done);
snprintf(w8001->phys, sizeof(w8001->phys), "%s/input0", serio->phys);
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
+ input_dev->keybit[BIT_WORD(BTN_TOOL_PEN)] |= BIT_MASK(BTN_TOOL_PEN);
+ input_dev->keybit[BIT_WORD(BTN_TOOL_RUBBER)] |= BIT_MASK(BTN_TOOL_RUBBER);
+ input_dev->keybit[BIT_WORD(BTN_STYLUS)] |= BIT_MASK(BTN_STYLUS);
+ input_dev->keybit[BIT_WORD(BTN_STYLUS2)] |= BIT_MASK(BTN_STYLUS2);
serio_set_drvdata(serio, w8001);
err = serio_open(serio, drv);
git.samba.org / sfrench / cifs-2.6.git / blobdiff