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linux-next/drivers/hid/hid-wacom.c
Przemo Firszt 78761ff9bc HID: wacom: Initial driver for Wacom Intuos4 Wireless (Bluetooth)
This is very basic driver for Wacom Intuos4 Wireless tablet. It supports only
position, pressure and pen buttons. More features will be added in the future.

Signed-off-by: Przemo Firszt <przemo@firszt.eu>
Acked-by: Ping Cheng <pinglinux@gmail.com>
Reviewed-by: Chris Bagwell <chris@cnpbagwell.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2011-11-13 21:32:52 +01:00

612 lines
15 KiB
C

/*
* Bluetooth Wacom Tablet support
*
* Copyright (c) 1999 Andreas Gal
* Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
* Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
* Copyright (c) 2006-2007 Jiri Kosina
* Copyright (c) 2007 Paul Walmsley
* Copyright (c) 2008 Jiri Slaby <jirislaby@gmail.com>
* Copyright (c) 2006 Andrew Zabolotny <zap@homelink.ru>
* Copyright (c) 2009 Bastien Nocera <hadess@hadess.net>
* Copyright (c) 2011 Przemysław Firszt <przemo@firszt.eu>
*/
/*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/device.h>
#include <linux/hid.h>
#include <linux/module.h>
#include <linux/slab.h>
#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
#include <linux/power_supply.h>
#endif
#include "hid-ids.h"
struct wacom_data {
__u16 tool;
unsigned char butstate;
__u8 features;
unsigned char high_speed;
#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
int battery_capacity;
struct power_supply battery;
struct power_supply ac;
#endif
};
#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
/*percent of battery capacity, 0 means AC online*/
static unsigned short batcap[8] = { 1, 15, 25, 35, 50, 70, 100, 0 };
static enum power_supply_property wacom_battery_props[] = {
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_CAPACITY
};
static enum power_supply_property wacom_ac_props[] = {
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_ONLINE
};
static int wacom_battery_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct wacom_data *wdata = container_of(psy,
struct wacom_data, battery);
int power_state = batcap[wdata->battery_capacity];
int ret = 0;
switch (psp) {
case POWER_SUPPLY_PROP_PRESENT:
val->intval = 1;
break;
case POWER_SUPPLY_PROP_CAPACITY:
/* show 100% battery capacity when charging */
if (power_state == 0)
val->intval = 100;
else
val->intval = power_state;
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static int wacom_ac_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct wacom_data *wdata = container_of(psy, struct wacom_data, ac);
int power_state = batcap[wdata->battery_capacity];
int ret = 0;
switch (psp) {
case POWER_SUPPLY_PROP_PRESENT:
/* fall through */
case POWER_SUPPLY_PROP_ONLINE:
if (power_state == 0)
val->intval = 1;
else
val->intval = 0;
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
#endif
static void wacom_set_features(struct hid_device *hdev)
{
int ret;
__u8 rep_data[2];
/*set high speed, tablet mode*/
rep_data[0] = 0x03;
rep_data[1] = 0x20;
ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
HID_FEATURE_REPORT);
return;
}
static void wacom_poke(struct hid_device *hdev, u8 speed)
{
struct wacom_data *wdata = hid_get_drvdata(hdev);
int limit, ret;
char rep_data[2];
rep_data[0] = 0x03 ; rep_data[1] = 0x00;
limit = 3;
do {
ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
HID_FEATURE_REPORT);
} while (ret < 0 && limit-- > 0);
if (ret >= 0) {
if (speed == 0)
rep_data[0] = 0x05;
else
rep_data[0] = 0x06;
rep_data[1] = 0x00;
limit = 3;
do {
ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
HID_FEATURE_REPORT);
} while (ret < 0 && limit-- > 0);
if (ret >= 0) {
wdata->high_speed = speed;
return;
}
}
/*
* Note that if the raw queries fail, it's not a hard failure and it
* is safe to continue
*/
hid_warn(hdev, "failed to poke device, command %d, err %d\n",
rep_data[0], ret);
return;
}
static ssize_t wacom_show_speed(struct device *dev,
struct device_attribute
*attr, char *buf)
{
struct wacom_data *wdata = dev_get_drvdata(dev);
return snprintf(buf, PAGE_SIZE, "%i\n", wdata->high_speed);
}
static ssize_t wacom_store_speed(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct hid_device *hdev = container_of(dev, struct hid_device, dev);
int new_speed;
if (sscanf(buf, "%1d", &new_speed ) != 1)
return -EINVAL;
if (new_speed == 0 || new_speed == 1) {
wacom_poke(hdev, new_speed);
return strnlen(buf, PAGE_SIZE);
} else
return -EINVAL;
}
static DEVICE_ATTR(speed, S_IRUGO | S_IWUSR | S_IWGRP,
wacom_show_speed, wacom_store_speed);
static int wacom_gr_parse_report(struct hid_device *hdev,
struct wacom_data *wdata,
struct input_dev *input, unsigned char *data)
{
int tool, x, y, rw;
tool = 0;
/* Get X & Y positions */
x = le16_to_cpu(*(__le16 *) &data[2]);
y = le16_to_cpu(*(__le16 *) &data[4]);
/* Get current tool identifier */
if (data[1] & 0x90) { /* If pen is in the in/active area */
switch ((data[1] >> 5) & 3) {
case 0: /* Pen */
tool = BTN_TOOL_PEN;
break;
case 1: /* Rubber */
tool = BTN_TOOL_RUBBER;
break;
case 2: /* Mouse with wheel */
case 3: /* Mouse without wheel */
tool = BTN_TOOL_MOUSE;
break;
}
/* Reset tool if out of active tablet area */
if (!(data[1] & 0x10))
tool = 0;
}
/* If tool changed, notify input subsystem */
if (wdata->tool != tool) {
if (wdata->tool) {
/* Completely reset old tool state */
if (wdata->tool == BTN_TOOL_MOUSE) {
input_report_key(input, BTN_LEFT, 0);
input_report_key(input, BTN_RIGHT, 0);
input_report_key(input, BTN_MIDDLE, 0);
input_report_abs(input, ABS_DISTANCE,
input_abs_get_max(input, ABS_DISTANCE));
} else {
input_report_key(input, BTN_TOUCH, 0);
input_report_key(input, BTN_STYLUS, 0);
input_report_key(input, BTN_STYLUS2, 0);
input_report_abs(input, ABS_PRESSURE, 0);
}
input_report_key(input, wdata->tool, 0);
input_sync(input);
}
wdata->tool = tool;
if (tool)
input_report_key(input, tool, 1);
}
if (tool) {
input_report_abs(input, ABS_X, x);
input_report_abs(input, ABS_Y, y);
switch ((data[1] >> 5) & 3) {
case 2: /* Mouse with wheel */
input_report_key(input, BTN_MIDDLE, data[1] & 0x04);
rw = (data[6] & 0x01) ? -1 :
(data[6] & 0x02) ? 1 : 0;
input_report_rel(input, REL_WHEEL, rw);
/* fall through */
case 3: /* Mouse without wheel */
input_report_key(input, BTN_LEFT, data[1] & 0x01);
input_report_key(input, BTN_RIGHT, data[1] & 0x02);
/* Compute distance between mouse and tablet */
rw = 44 - (data[6] >> 2);
if (rw < 0)
rw = 0;
else if (rw > 31)
rw = 31;
input_report_abs(input, ABS_DISTANCE, rw);
break;
default:
input_report_abs(input, ABS_PRESSURE,
data[6] | (((__u16) (data[1] & 0x08)) << 5));
input_report_key(input, BTN_TOUCH, data[1] & 0x01);
input_report_key(input, BTN_STYLUS, data[1] & 0x02);
input_report_key(input, BTN_STYLUS2, (tool == BTN_TOOL_PEN) && data[1] & 0x04);
break;
}
input_sync(input);
}
/* Report the state of the two buttons at the top of the tablet
* as two extra fingerpad keys (buttons 4 & 5). */
rw = data[7] & 0x03;
if (rw != wdata->butstate) {
wdata->butstate = rw;
input_report_key(input, BTN_0, rw & 0x02);
input_report_key(input, BTN_1, rw & 0x01);
input_report_key(input, BTN_TOOL_FINGER, 0xf0);
input_event(input, EV_MSC, MSC_SERIAL, 0xf0);
input_sync(input);
}
#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
/* Store current battery capacity */
rw = (data[7] >> 2 & 0x07);
if (rw != wdata->battery_capacity)
wdata->battery_capacity = rw;
#endif
return 1;
}
static void wacom_i4_parse_pen_report(struct wacom_data *wdata,
struct input_dev *input, unsigned char *data)
{
__u16 x, y, pressure;
__u32 id;
switch (data[1]) {
case 0x80: /* Out of proximity report */
wdata->tool = 0;
input_report_key(input, BTN_TOUCH, 0);
input_report_abs(input, ABS_PRESSURE, 0);
input_report_key(input, wdata->tool, 0);
input_sync(input);
break;
case 0xC2: /* Tool report */
id = ((data[2] << 4) | (data[3] >> 4) |
((data[7] & 0x0f) << 20) |
((data[8] & 0xf0) << 12)) & 0xfffff;
switch (id) {
case 0x802:
wdata->tool = BTN_TOOL_PEN;
break;
case 0x80A:
wdata->tool = BTN_TOOL_RUBBER;
break;
}
break;
default: /* Position/pressure report */
x = data[2] << 9 | data[3] << 1 | ((data[9] & 0x02) >> 1);
y = data[4] << 9 | data[5] << 1 | (data[9] & 0x01);
pressure = (data[6] << 3) | ((data[7] & 0xC0) >> 5)
| (data[1] & 0x01);
input_report_key(input, BTN_TOUCH, pressure > 1);
input_report_key(input, BTN_STYLUS, data[1] & 0x02);
input_report_key(input, BTN_STYLUS2, data[1] & 0x04);
input_report_key(input, wdata->tool, 1);
input_report_abs(input, ABS_X, x);
input_report_abs(input, ABS_Y, y);
input_report_abs(input, ABS_PRESSURE, pressure);
input_sync(input);
break;
}
return;
}
static void wacom_i4_parse_report(struct hid_device *hdev,
struct wacom_data *wdata,
struct input_dev *input, unsigned char *data)
{
switch (data[0]) {
case 0x00: /* Empty report */
break;
case 0x02: /* Pen report */
wacom_i4_parse_pen_report(wdata, input, data);
break;
case 0x03: /* Features Report */
wdata->features = data[2];
break;
case 0x0C: /* Button report */
break;
default:
hid_err(hdev, "Unknown report: %d,%d\n", data[0], data[1]);
break;
}
}
static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
u8 *raw_data, int size)
{
struct wacom_data *wdata = hid_get_drvdata(hdev);
struct hid_input *hidinput;
struct input_dev *input;
unsigned char *data = (unsigned char *) raw_data;
int i;
if (!(hdev->claimed & HID_CLAIMED_INPUT))
return 0;
hidinput = list_entry(hdev->inputs.next, struct hid_input, list);
input = hidinput->input;
/* Check if this is a tablet report */
if (data[0] != 0x03)
return 0;
switch (hdev->product) {
case USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH:
return wacom_gr_parse_report(hdev, wdata, input, data);
break;
case USB_DEVICE_ID_WACOM_INTUOS4_BLUETOOTH:
i = 1;
switch (data[0]) {
case 0x04:
wacom_i4_parse_report(hdev, wdata, input, data + i);
i += 10;
/* fall through */
case 0x03:
wacom_i4_parse_report(hdev, wdata, input, data + i);
i += 10;
wacom_i4_parse_report(hdev, wdata, input, data + i);
break;
default:
hid_err(hdev, "Unknown report: %d,%d size:%d\n",
data[0], data[1], size);
return 0;
}
}
return 1;
}
static int wacom_input_mapped(struct hid_device *hdev, struct hid_input *hi,
struct hid_field *field, struct hid_usage *usage, unsigned long **bit,
int *max)
{
struct input_dev *input = hi->input;
__set_bit(INPUT_PROP_POINTER, input->propbit);
/* Basics */
input->evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_REL);
__set_bit(REL_WHEEL, input->relbit);
__set_bit(BTN_TOOL_PEN, input->keybit);
__set_bit(BTN_TOUCH, input->keybit);
__set_bit(BTN_STYLUS, input->keybit);
__set_bit(BTN_STYLUS2, input->keybit);
__set_bit(BTN_LEFT, input->keybit);
__set_bit(BTN_RIGHT, input->keybit);
__set_bit(BTN_MIDDLE, input->keybit);
/* Pad */
input->evbit[0] |= BIT(EV_MSC);
__set_bit(MSC_SERIAL, input->mscbit);
__set_bit(BTN_0, input->keybit);
__set_bit(BTN_1, input->keybit);
__set_bit(BTN_TOOL_FINGER, input->keybit);
/* Distance, rubber and mouse */
__set_bit(BTN_TOOL_RUBBER, input->keybit);
__set_bit(BTN_TOOL_MOUSE, input->keybit);
switch (hdev->product) {
case USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH:
input_set_abs_params(input, ABS_X, 0, 16704, 4, 0);
input_set_abs_params(input, ABS_Y, 0, 12064, 4, 0);
input_set_abs_params(input, ABS_PRESSURE, 0, 511, 0, 0);
input_set_abs_params(input, ABS_DISTANCE, 0, 32, 0, 0);
break;
case USB_DEVICE_ID_WACOM_INTUOS4_BLUETOOTH:
input_set_abs_params(input, ABS_X, 0, 40640, 4, 0);
input_set_abs_params(input, ABS_Y, 0, 25400, 4, 0);
input_set_abs_params(input, ABS_PRESSURE, 0, 2047, 0, 0);
break;
}
return 0;
}
static int wacom_probe(struct hid_device *hdev,
const struct hid_device_id *id)
{
struct wacom_data *wdata;
int ret;
wdata = kzalloc(sizeof(*wdata), GFP_KERNEL);
if (wdata == NULL) {
hid_err(hdev, "can't alloc wacom descriptor\n");
return -ENOMEM;
}
hid_set_drvdata(hdev, wdata);
/* Parse the HID report now */
ret = hid_parse(hdev);
if (ret) {
hid_err(hdev, "parse failed\n");
goto err_free;
}
ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
if (ret) {
hid_err(hdev, "hw start failed\n");
goto err_free;
}
ret = device_create_file(&hdev->dev, &dev_attr_speed);
if (ret)
hid_warn(hdev,
"can't create sysfs speed attribute err: %d\n", ret);
switch (hdev->product) {
case USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH:
/* Set Wacom mode 2 with high reporting speed */
wacom_poke(hdev, 1);
break;
case USB_DEVICE_ID_WACOM_INTUOS4_BLUETOOTH:
wdata->features = 0;
wacom_set_features(hdev);
break;
}
#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
wdata->battery.properties = wacom_battery_props;
wdata->battery.num_properties = ARRAY_SIZE(wacom_battery_props);
wdata->battery.get_property = wacom_battery_get_property;
wdata->battery.name = "wacom_battery";
wdata->battery.type = POWER_SUPPLY_TYPE_BATTERY;
wdata->battery.use_for_apm = 0;
ret = power_supply_register(&hdev->dev, &wdata->battery);
if (ret) {
hid_warn(hdev, "can't create sysfs battery attribute, err: %d\n",
ret);
goto err_battery;
}
wdata->ac.properties = wacom_ac_props;
wdata->ac.num_properties = ARRAY_SIZE(wacom_ac_props);
wdata->ac.get_property = wacom_ac_get_property;
wdata->ac.name = "wacom_ac";
wdata->ac.type = POWER_SUPPLY_TYPE_MAINS;
wdata->ac.use_for_apm = 0;
ret = power_supply_register(&hdev->dev, &wdata->ac);
if (ret) {
hid_warn(hdev,
"can't create ac battery attribute, err: %d\n", ret);
goto err_ac;
}
#endif
return 0;
#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
err_ac:
power_supply_unregister(&wdata->battery);
err_battery:
device_remove_file(&hdev->dev, &dev_attr_speed);
hid_hw_stop(hdev);
#endif
err_free:
kfree(wdata);
return ret;
}
static void wacom_remove(struct hid_device *hdev)
{
#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
struct wacom_data *wdata = hid_get_drvdata(hdev);
#endif
device_remove_file(&hdev->dev, &dev_attr_speed);
hid_hw_stop(hdev);
#ifdef CONFIG_HID_WACOM_POWER_SUPPLY
power_supply_unregister(&wdata->battery);
power_supply_unregister(&wdata->ac);
#endif
kfree(hid_get_drvdata(hdev));
}
static const struct hid_device_id wacom_devices[] = {
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH) },
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS4_BLUETOOTH) },
{ }
};
MODULE_DEVICE_TABLE(hid, wacom_devices);
static struct hid_driver wacom_driver = {
.name = "wacom",
.id_table = wacom_devices,
.probe = wacom_probe,
.remove = wacom_remove,
.raw_event = wacom_raw_event,
.input_mapped = wacom_input_mapped,
};
static int __init wacom_init(void)
{
int ret;
ret = hid_register_driver(&wacom_driver);
if (ret)
pr_err("can't register wacom driver\n");
return ret;
}
static void __exit wacom_exit(void)
{
hid_unregister_driver(&wacom_driver);
}
module_init(wacom_init);
module_exit(wacom_exit);
MODULE_LICENSE("GPL");