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