*
* Copyright (c) 2008 Jaya Kumar
* Copyright (c) 2010 Red Hat, Inc.
+ * Copyright (c) 2010 - 2011 Ping Cheng, Wacom. <pingc@wacom.com>
*
* 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
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
-#include <linux/input.h>
+#include <linux/input/mt.h>
#include <linux/serio.h>
#include <linux/init.h>
#include <linux/ctype.h>
+#include <linux/delay.h>
#define DRIVER_DESC "Wacom W8001 serial touchscreen driver"
#define W8001_QUERY_PACKET 0x20
+#define W8001_CMD_STOP '0'
#define W8001_CMD_START '1'
#define W8001_CMD_QUERY '*'
#define W8001_CMD_TOUCHQUERY '%'
#define W8001_PKTLEN_TPCCTL 11 /* control packet */
#define W8001_PKTLEN_TOUCH2FG 13
-#define MAX_TRACKING_ID 0xFF /* arbitrarily chosen */
+/* resolution in points/mm */
+#define W8001_PEN_RESOLUTION 100
+#define W8001_TOUCH_RESOLUTION 10
struct w8001_coord {
u8 rdy;
/* touch query reply packet */
struct w8001_touch_query {
+ u16 x;
+ u16 y;
u8 panel_res;
u8 capacity_res;
u8 sensor_id;
- u16 x;
- u16 y;
};
/*
char phys[32];
int type;
unsigned int pktlen;
- int trkid[2];
+ u16 max_touch_x;
+ u16 max_touch_y;
+ u16 max_pen_x;
+ u16 max_pen_y;
+ char name[64];
};
-static void parse_data(u8 *data, struct w8001_coord *coord)
+static void parse_pen_data(u8 *data, struct w8001_coord *coord)
{
memset(coord, 0, sizeof(*coord));
coord->tilt_y = data[8] & 0x7F;
}
-static void parse_touch(struct w8001 *w8001)
+static void parse_single_touch(u8 *data, struct w8001_coord *coord)
+{
+ coord->x = (data[1] << 7) | data[2];
+ coord->y = (data[3] << 7) | data[4];
+ coord->tsw = data[0] & 0x01;
+}
+
+static void scale_touch_coordinates(struct w8001 *w8001,
+ unsigned int *x, unsigned int *y)
+{
+ if (w8001->max_pen_x && w8001->max_touch_x)
+ *x = *x * w8001->max_pen_x / w8001->max_touch_x;
+
+ if (w8001->max_pen_y && w8001->max_touch_y)
+ *y = *y * w8001->max_pen_y / w8001->max_touch_y;
+}
+
+static void parse_multi_touch(struct w8001 *w8001)
{
- static int trkid;
struct input_dev *dev = w8001->dev;
unsigned char *data = w8001->data;
+ unsigned int x, y;
int i;
+ int count = 0;
for (i = 0; i < 2; i++) {
- input_mt_slot(dev, i);
+ bool touch = data[0] & (1 << 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]);
+ input_mt_slot(dev, i);
+ input_mt_report_slot_state(dev, MT_TOOL_FINGER, touch);
+ if (touch) {
+ x = (data[6 * i + 1] << 7) | data[6 * i + 2];
+ y = (data[6 * i + 3] << 7) | data[6 * i + 4];
/* data[5,6] and [11,12] is finger capacity */
+ /* scale to pen maximum */
+ scale_touch_coordinates(w8001, &x, &y);
+
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;
+ count++;
}
- input_report_abs(dev, ABS_MT_TRACKING_ID, w8001->trkid[i]);
+ }
+
+ /* emulate single touch events when stylus is out of proximity.
+ * This is to make single touch backward support consistent
+ * across all Wacom single touch devices.
+ */
+ if (w8001->type != BTN_TOOL_PEN &&
+ w8001->type != BTN_TOOL_RUBBER) {
+ w8001->type = count == 1 ? BTN_TOOL_FINGER : KEY_RESERVED;
+ input_mt_report_pointer_emulation(dev, true);
}
input_sync(dev);
query->y = data[5] << 9;
query->y |= data[6] << 2;
query->y |= (data[2] >> 3) & 0x3;
+
+ /* Early days' single-finger touch models need the following defaults */
+ if (!query->x && !query->y) {
+ query->x = 1024;
+ query->y = 1024;
+ if (query->panel_res)
+ query->x = query->y = (1 << query->panel_res);
+ query->panel_res = W8001_TOUCH_RESOLUTION;
+ }
}
static void report_pen_events(struct w8001 *w8001, struct w8001_coord *coord)
/*
* 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
+ * 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) {
+ switch (w8001->type) {
+ case BTN_TOOL_RUBBER:
if (!coord->f2) {
input_report_abs(dev, ABS_PRESSURE, 0);
input_report_key(dev, BTN_TOUCH, 0);
input_sync(dev);
w8001->type = BTN_TOOL_PEN;
}
- } else {
+ break;
+
+ case BTN_TOOL_FINGER:
+ input_report_key(dev, BTN_TOUCH, 0);
+ input_report_key(dev, BTN_TOOL_FINGER, 0);
+ input_sync(dev);
+ /* fall through */
+
+ case KEY_RESERVED:
+ w8001->type = coord->f2 ? BTN_TOOL_RUBBER : BTN_TOOL_PEN;
+ break;
+
+ default:
input_report_key(dev, BTN_STYLUS2, coord->f2);
+ break;
}
input_report_abs(dev, ABS_X, coord->x);
input_sync(dev);
if (!coord->rdy)
- w8001->type = 0;
+ w8001->type = KEY_RESERVED;
+}
+
+static void report_single_touch(struct w8001 *w8001, struct w8001_coord *coord)
+{
+ struct input_dev *dev = w8001->dev;
+ unsigned int x = coord->x;
+ unsigned int y = coord->y;
+
+ /* scale to pen maximum */
+ scale_touch_coordinates(w8001, &x, &y);
+
+ input_report_abs(dev, ABS_X, x);
+ input_report_abs(dev, ABS_Y, y);
+ input_report_key(dev, BTN_TOUCH, coord->tsw);
+ input_report_key(dev, BTN_TOOL_FINGER, coord->tsw);
+
+ input_sync(dev);
+
+ w8001->type = coord->tsw ? BTN_TOOL_FINGER : KEY_RESERVED;
}
static irqreturn_t w8001_interrupt(struct serio *serio,
case W8001_PKTLEN_TOUCH93 - 1:
case W8001_PKTLEN_TOUCH9A - 1:
- /* ignore one-finger touch packet. */
- if (w8001->pktlen == w8001->idx)
+ tmp = w8001->data[0] & W8001_TOUCH_BYTE;
+ if (tmp != W8001_TOUCH_BYTE)
+ break;
+
+ if (w8001->pktlen == w8001->idx) {
w8001->idx = 0;
+ if (w8001->type != BTN_TOOL_PEN &&
+ w8001->type != BTN_TOOL_RUBBER) {
+ parse_single_touch(w8001->data, &coord);
+ report_single_touch(w8001, &coord);
+ }
+ }
break;
/* Pen coordinates packet */
if (unlikely(tmp == W8001_TAB_BYTE))
break;
- tmp = (w8001->data[0] & W8001_TOUCH_BYTE);
+ tmp = w8001->data[0] & W8001_TOUCH_BYTE;
if (tmp == W8001_TOUCH_BYTE)
break;
w8001->idx = 0;
- parse_data(w8001->data, &coord);
+ parse_pen_data(w8001->data, &coord);
report_pen_events(w8001, &coord);
break;
/* control packet */
case W8001_PKTLEN_TPCCTL - 1:
- tmp = (w8001->data[0] & W8001_TOUCH_MASK);
+ tmp = w8001->data[0] & W8001_TOUCH_MASK;
if (tmp == W8001_TOUCH_BYTE)
break;
/* 2 finger touch packet */
case W8001_PKTLEN_TOUCH2FG - 1:
w8001->idx = 0;
- parse_touch(w8001);
+ parse_multi_touch(w8001);
break;
}
{
struct input_dev *dev = w8001->dev;
struct w8001_coord coord;
+ struct w8001_touch_query touch;
int error;
- error = w8001_command(w8001, W8001_CMD_QUERY, true);
+ error = w8001_command(w8001, W8001_CMD_STOP, false);
if (error)
return error;
- parse_data(w8001->response, &coord);
+ msleep(250); /* wait 250ms before querying the device */
- input_set_abs_params(dev, ABS_X, 0, coord.x, 0, 0);
- input_set_abs_params(dev, ABS_Y, 0, coord.y, 0, 0);
- input_set_abs_params(dev, ABS_PRESSURE, 0, coord.pen_pressure, 0, 0);
- 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);
+ dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
+ strlcat(w8001->name, "Wacom Serial", sizeof(w8001->name));
- error = w8001_command(w8001, W8001_CMD_TOUCHQUERY, true);
+ /* penabled? */
+ error = w8001_command(w8001, W8001_CMD_QUERY, true);
if (!error) {
- struct w8001_touch_query touch;
+ __set_bit(BTN_TOUCH, dev->keybit);
+ __set_bit(BTN_TOOL_PEN, dev->keybit);
+ __set_bit(BTN_TOOL_RUBBER, dev->keybit);
+ __set_bit(BTN_STYLUS, dev->keybit);
+ __set_bit(BTN_STYLUS2, dev->keybit);
+
+ parse_pen_data(w8001->response, &coord);
+ w8001->max_pen_x = coord.x;
+ w8001->max_pen_y = coord.y;
+
+ input_set_abs_params(dev, ABS_X, 0, coord.x, 0, 0);
+ input_set_abs_params(dev, ABS_Y, 0, coord.y, 0, 0);
+ input_abs_set_res(dev, ABS_X, W8001_PEN_RESOLUTION);
+ input_abs_set_res(dev, ABS_Y, W8001_PEN_RESOLUTION);
+ input_set_abs_params(dev, ABS_PRESSURE, 0, coord.pen_pressure, 0, 0);
+ if (coord.tilt_x && coord.tilt_y) {
+ 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);
+ }
+ w8001->id = 0x90;
+ strlcat(w8001->name, " Penabled", sizeof(w8001->name));
+ }
+
+ /* Touch enabled? */
+ error = w8001_command(w8001, W8001_CMD_TOUCHQUERY, true);
+
+ /*
+ * Some non-touch devices may reply to the touch query. But their
+ * second byte is empty, which indicates touch is not supported.
+ */
+ if (!error && w8001->response[1]) {
+ __set_bit(BTN_TOUCH, dev->keybit);
+ __set_bit(BTN_TOOL_FINGER, dev->keybit);
parse_touchquery(w8001->response, &touch);
+ w8001->max_touch_x = touch.x;
+ w8001->max_touch_y = touch.y;
+
+ if (w8001->max_pen_x && w8001->max_pen_y) {
+ /* if pen is supported scale to pen maximum */
+ touch.x = w8001->max_pen_x;
+ touch.y = w8001->max_pen_y;
+ touch.panel_res = W8001_PEN_RESOLUTION;
+ }
+
+ input_set_abs_params(dev, ABS_X, 0, touch.x, 0, 0);
+ input_set_abs_params(dev, ABS_Y, 0, touch.y, 0, 0);
+ input_abs_set_res(dev, ABS_X, touch.panel_res);
+ input_abs_set_res(dev, ABS_Y, touch.panel_res);
switch (touch.sensor_id) {
case 0:
case 2:
w8001->pktlen = W8001_PKTLEN_TOUCH93;
+ w8001->id = 0x93;
+ strlcat(w8001->name, " 1FG", sizeof(w8001->name));
break;
+
case 1:
case 3:
case 4:
w8001->pktlen = W8001_PKTLEN_TOUCH9A;
+ strlcat(w8001->name, " 1FG", sizeof(w8001->name));
+ w8001->id = 0x9a;
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_mt_init_slots(dev, 2);
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);
+ 0, MT_TOOL_MAX, 0, 0);
+
+ strlcat(w8001->name, " 2FG", sizeof(w8001->name));
+ if (w8001->max_pen_x && w8001->max_pen_y)
+ w8001->id = 0xE3;
+ else
+ w8001->id = 0xE2;
break;
}
}
+ strlcat(w8001->name, " Touchscreen", sizeof(w8001->name));
+
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->name = "Wacom W8001 Penabled Serial TouchScreen";
- input_dev->phys = w8001->phys;
- input_dev->id.bustype = BUS_RS232;
- input_dev->id.vendor = SERIO_W8001;
- input_dev->id.product = w8001->id;
- input_dev->id.version = 0x0100;
- input_dev->dev.parent = &serio->dev;
-
- 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);
if (err)
if (err)
goto fail3;
+ input_dev->name = w8001->name;
+ input_dev->phys = w8001->phys;
+ input_dev->id.product = w8001->id;
+ input_dev->id.bustype = BUS_RS232;
+ input_dev->id.vendor = 0x056a;
+ input_dev->id.version = 0x0100;
+ input_dev->dev.parent = &serio->dev;
+
err = input_register_device(w8001->dev);
if (err)
goto fail3;
projects / mv-sheeva.git / blobdiff