/* * 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, POWER_SUPPLY_PROP_SCOPE, }; static enum power_supply_property wacom_ac_props[] = { POWER_SUPPLY_PROP_PRESENT, POWER_SUPPLY_PROP_ONLINE, POWER_SUPPLY_PROP_SCOPE, }; 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_SCOPE: val->intval = POWER_SUPPLY_SCOPE_DEVICE; 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; case POWER_SUPPLY_PROP_SCOPE: val->intval = POWER_SUPPLY_SCOPE_DEVICE; 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; } power_supply_powers(&wdata->battery, &hdev->dev); 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; } power_supply_powers(&wdata->ac, &hdev->dev); #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");