/* * 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> */ /* * 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. */ #include <linux/device.h> #include <linux/hid.h> #include <linux/module.h> #include "hid-ids.h" struct wacom_data { __u16 tool; unsigned char butstate; }; 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 tool, x, y, rw; if (!(hdev->claimed & HID_CLAIMED_INPUT)) return 0; tool = 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; /* 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->absmax[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_event(input, EV_MSC, MSC_SERIAL, 0xf0); input_sync(input); } return 1; } static int wacom_probe(struct hid_device *hdev, const struct hid_device_id *id) { struct hid_input *hidinput; struct input_dev *input; struct wacom_data *wdata; int ret; wdata = kzalloc(sizeof(*wdata), GFP_KERNEL); if (wdata == NULL) { dev_err(&hdev->dev, "can't alloc wacom descriptor\n"); return -ENOMEM; } hid_set_drvdata(hdev, wdata); ret = hid_parse(hdev); if (ret) { dev_err(&hdev->dev, "parse failed\n"); goto err_free; } ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); if (ret) { dev_err(&hdev->dev, "hw start failed\n"); goto err_free; } hidinput = list_entry(hdev->inputs.next, struct hid_input, list); input = hidinput->input; /* Basics */ input->evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_REL); input->absbit[0] |= BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE) | BIT(ABS_DISTANCE); input->relbit[0] |= BIT(REL_WHEEL); 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); input->mscbit[0] |= BIT(MSC_SERIAL); /* Distance, rubber and mouse */ input->absbit[0] |= BIT(ABS_DISTANCE); set_bit(BTN_TOOL_RUBBER, input->keybit); set_bit(BTN_TOOL_MOUSE, input->keybit); input->absmax[ABS_PRESSURE] = 511; input->absmax[ABS_DISTANCE] = 32; input->absmax[ABS_X] = 16704; input->absmax[ABS_Y] = 12064; input->absfuzz[ABS_X] = 4; input->absfuzz[ABS_Y] = 4; return 0; err_free: kfree(wdata); return ret; } static void wacom_remove(struct hid_device *hdev) { hid_hw_stop(hdev); 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) }, { } }; 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, }; static int wacom_init(void) { int ret; ret = hid_register_driver(&wacom_driver); if (ret) printk(KERN_ERR "can't register wacom driver\n"); printk(KERN_ERR "wacom driver registered\n"); return ret; } static void wacom_exit(void) { hid_unregister_driver(&wacom_driver); } module_init(wacom_init); module_exit(wacom_exit); MODULE_LICENSE("GPL");