104561c5aa243c98cae93cde27e05740df787e692Ignaz Forster/* 204561c5aa243c98cae93cde27e05740df787e692Ignaz Forster * Force feedback support for EMS Trio Linker Plus II 304561c5aa243c98cae93cde27e05740df787e692Ignaz Forster * 404561c5aa243c98cae93cde27e05740df787e692Ignaz Forster * Copyright (c) 2010 Ignaz Forster <ignaz.forster@gmx.de> 504561c5aa243c98cae93cde27e05740df787e692Ignaz Forster */ 604561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 704561c5aa243c98cae93cde27e05740df787e692Ignaz Forster/* 804561c5aa243c98cae93cde27e05740df787e692Ignaz Forster * This program is free software; you can redistribute it and/or modify 904561c5aa243c98cae93cde27e05740df787e692Ignaz Forster * it under the terms of the GNU General Public License as published by 1004561c5aa243c98cae93cde27e05740df787e692Ignaz Forster * the Free Software Foundation; either version 2 of the License, or 1104561c5aa243c98cae93cde27e05740df787e692Ignaz Forster * (at your option) any later version. 1204561c5aa243c98cae93cde27e05740df787e692Ignaz Forster * 1304561c5aa243c98cae93cde27e05740df787e692Ignaz Forster * This program is distributed in the hope that it will be useful, 1404561c5aa243c98cae93cde27e05740df787e692Ignaz Forster * but WITHOUT ANY WARRANTY; without even the implied warranty of 1504561c5aa243c98cae93cde27e05740df787e692Ignaz Forster * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1604561c5aa243c98cae93cde27e05740df787e692Ignaz Forster * GNU General Public License for more details. 1704561c5aa243c98cae93cde27e05740df787e692Ignaz Forster * 1804561c5aa243c98cae93cde27e05740df787e692Ignaz Forster * You should have received a copy of the GNU General Public License 1904561c5aa243c98cae93cde27e05740df787e692Ignaz Forster * along with this program; if not, write to the Free Software 2004561c5aa243c98cae93cde27e05740df787e692Ignaz Forster * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 2104561c5aa243c98cae93cde27e05740df787e692Ignaz Forster */ 2204561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 2304561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 2404561c5aa243c98cae93cde27e05740df787e692Ignaz Forster#include <linux/hid.h> 2504561c5aa243c98cae93cde27e05740df787e692Ignaz Forster#include <linux/input.h> 268f86a2c3cb90e8bb0733de2d2b0abbe7050bb536Paul Gortmaker#include <linux/module.h> 2704561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 2804561c5aa243c98cae93cde27e05740df787e692Ignaz Forster#include "hid-ids.h" 2904561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 3004561c5aa243c98cae93cde27e05740df787e692Ignaz Forsterstruct emsff_device { 3104561c5aa243c98cae93cde27e05740df787e692Ignaz Forster struct hid_report *report; 3204561c5aa243c98cae93cde27e05740df787e692Ignaz Forster}; 3304561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 3404561c5aa243c98cae93cde27e05740df787e692Ignaz Forsterstatic int emsff_play(struct input_dev *dev, void *data, 3504561c5aa243c98cae93cde27e05740df787e692Ignaz Forster struct ff_effect *effect) 3604561c5aa243c98cae93cde27e05740df787e692Ignaz Forster{ 3704561c5aa243c98cae93cde27e05740df787e692Ignaz Forster struct hid_device *hid = input_get_drvdata(dev); 3804561c5aa243c98cae93cde27e05740df787e692Ignaz Forster struct emsff_device *emsff = data; 3904561c5aa243c98cae93cde27e05740df787e692Ignaz Forster int weak, strong; 4004561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 4104561c5aa243c98cae93cde27e05740df787e692Ignaz Forster weak = effect->u.rumble.weak_magnitude; 4204561c5aa243c98cae93cde27e05740df787e692Ignaz Forster strong = effect->u.rumble.strong_magnitude; 4304561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 4404561c5aa243c98cae93cde27e05740df787e692Ignaz Forster dbg_hid("called with 0x%04x 0x%04x\n", strong, weak); 4504561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 4604561c5aa243c98cae93cde27e05740df787e692Ignaz Forster weak = weak * 0xff / 0xffff; 4704561c5aa243c98cae93cde27e05740df787e692Ignaz Forster strong = strong * 0xff / 0xffff; 4804561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 4904561c5aa243c98cae93cde27e05740df787e692Ignaz Forster emsff->report->field[0]->value[1] = weak; 5004561c5aa243c98cae93cde27e05740df787e692Ignaz Forster emsff->report->field[0]->value[2] = strong; 5104561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 5204561c5aa243c98cae93cde27e05740df787e692Ignaz Forster dbg_hid("running with 0x%02x 0x%02x\n", strong, weak); 53d881427253da011495f4193663d809d0e9dfa215Benjamin Tissoires hid_hw_request(hid, emsff->report, HID_REQ_SET_REPORT); 5404561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 5504561c5aa243c98cae93cde27e05740df787e692Ignaz Forster return 0; 5604561c5aa243c98cae93cde27e05740df787e692Ignaz Forster} 5704561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 5804561c5aa243c98cae93cde27e05740df787e692Ignaz Forsterstatic int emsff_init(struct hid_device *hid) 5904561c5aa243c98cae93cde27e05740df787e692Ignaz Forster{ 6004561c5aa243c98cae93cde27e05740df787e692Ignaz Forster struct emsff_device *emsff; 6104561c5aa243c98cae93cde27e05740df787e692Ignaz Forster struct hid_report *report; 6204561c5aa243c98cae93cde27e05740df787e692Ignaz Forster struct hid_input *hidinput = list_first_entry(&hid->inputs, 6304561c5aa243c98cae93cde27e05740df787e692Ignaz Forster struct hid_input, list); 6404561c5aa243c98cae93cde27e05740df787e692Ignaz Forster struct list_head *report_list = 6504561c5aa243c98cae93cde27e05740df787e692Ignaz Forster &hid->report_enum[HID_OUTPUT_REPORT].report_list; 6604561c5aa243c98cae93cde27e05740df787e692Ignaz Forster struct input_dev *dev = hidinput->input; 6704561c5aa243c98cae93cde27e05740df787e692Ignaz Forster int error; 6804561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 6904561c5aa243c98cae93cde27e05740df787e692Ignaz Forster if (list_empty(report_list)) { 704291ee305e9bb0699504a66f0e2b7aefcf0512a5Joe Perches hid_err(hid, "no output reports found\n"); 7104561c5aa243c98cae93cde27e05740df787e692Ignaz Forster return -ENODEV; 7204561c5aa243c98cae93cde27e05740df787e692Ignaz Forster } 7304561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 7404561c5aa243c98cae93cde27e05740df787e692Ignaz Forster report = list_first_entry(report_list, struct hid_report, list); 7504561c5aa243c98cae93cde27e05740df787e692Ignaz Forster if (report->maxfield < 1) { 764291ee305e9bb0699504a66f0e2b7aefcf0512a5Joe Perches hid_err(hid, "no fields in the report\n"); 7704561c5aa243c98cae93cde27e05740df787e692Ignaz Forster return -ENODEV; 7804561c5aa243c98cae93cde27e05740df787e692Ignaz Forster } 7904561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 8004561c5aa243c98cae93cde27e05740df787e692Ignaz Forster if (report->field[0]->report_count < 7) { 814291ee305e9bb0699504a66f0e2b7aefcf0512a5Joe Perches hid_err(hid, "not enough values in the field\n"); 8204561c5aa243c98cae93cde27e05740df787e692Ignaz Forster return -ENODEV; 8304561c5aa243c98cae93cde27e05740df787e692Ignaz Forster } 8404561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 8504561c5aa243c98cae93cde27e05740df787e692Ignaz Forster emsff = kzalloc(sizeof(struct emsff_device), GFP_KERNEL); 8604561c5aa243c98cae93cde27e05740df787e692Ignaz Forster if (!emsff) 8704561c5aa243c98cae93cde27e05740df787e692Ignaz Forster return -ENOMEM; 8804561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 8904561c5aa243c98cae93cde27e05740df787e692Ignaz Forster set_bit(FF_RUMBLE, dev->ffbit); 9004561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 9104561c5aa243c98cae93cde27e05740df787e692Ignaz Forster error = input_ff_create_memless(dev, emsff, emsff_play); 9204561c5aa243c98cae93cde27e05740df787e692Ignaz Forster if (error) { 9304561c5aa243c98cae93cde27e05740df787e692Ignaz Forster kfree(emsff); 9404561c5aa243c98cae93cde27e05740df787e692Ignaz Forster return error; 9504561c5aa243c98cae93cde27e05740df787e692Ignaz Forster } 9604561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 9704561c5aa243c98cae93cde27e05740df787e692Ignaz Forster emsff->report = report; 9804561c5aa243c98cae93cde27e05740df787e692Ignaz Forster emsff->report->field[0]->value[0] = 0x01; 9904561c5aa243c98cae93cde27e05740df787e692Ignaz Forster emsff->report->field[0]->value[1] = 0x00; 10004561c5aa243c98cae93cde27e05740df787e692Ignaz Forster emsff->report->field[0]->value[2] = 0x00; 10104561c5aa243c98cae93cde27e05740df787e692Ignaz Forster emsff->report->field[0]->value[3] = 0x00; 10204561c5aa243c98cae93cde27e05740df787e692Ignaz Forster emsff->report->field[0]->value[4] = 0x00; 10304561c5aa243c98cae93cde27e05740df787e692Ignaz Forster emsff->report->field[0]->value[5] = 0x00; 10404561c5aa243c98cae93cde27e05740df787e692Ignaz Forster emsff->report->field[0]->value[6] = 0x00; 105d881427253da011495f4193663d809d0e9dfa215Benjamin Tissoires hid_hw_request(hid, emsff->report, HID_REQ_SET_REPORT); 10604561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 1074291ee305e9bb0699504a66f0e2b7aefcf0512a5Joe Perches hid_info(hid, "force feedback for EMS based devices by Ignaz Forster <ignaz.forster@gmx.de>\n"); 10804561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 10904561c5aa243c98cae93cde27e05740df787e692Ignaz Forster return 0; 11004561c5aa243c98cae93cde27e05740df787e692Ignaz Forster} 11104561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 11204561c5aa243c98cae93cde27e05740df787e692Ignaz Forsterstatic int ems_probe(struct hid_device *hdev, const struct hid_device_id *id) 11304561c5aa243c98cae93cde27e05740df787e692Ignaz Forster{ 11404561c5aa243c98cae93cde27e05740df787e692Ignaz Forster int ret; 11504561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 11604561c5aa243c98cae93cde27e05740df787e692Ignaz Forster ret = hid_parse(hdev); 11704561c5aa243c98cae93cde27e05740df787e692Ignaz Forster if (ret) { 1184291ee305e9bb0699504a66f0e2b7aefcf0512a5Joe Perches hid_err(hdev, "parse failed\n"); 11904561c5aa243c98cae93cde27e05740df787e692Ignaz Forster goto err; 12004561c5aa243c98cae93cde27e05740df787e692Ignaz Forster } 12104561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 12204561c5aa243c98cae93cde27e05740df787e692Ignaz Forster ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); 12304561c5aa243c98cae93cde27e05740df787e692Ignaz Forster if (ret) { 1244291ee305e9bb0699504a66f0e2b7aefcf0512a5Joe Perches hid_err(hdev, "hw start failed\n"); 12504561c5aa243c98cae93cde27e05740df787e692Ignaz Forster goto err; 12604561c5aa243c98cae93cde27e05740df787e692Ignaz Forster } 12704561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 1282dcd9543a28da523a179a13b1eefa5f9b8e05d72Axel Lin ret = emsff_init(hdev); 1292dcd9543a28da523a179a13b1eefa5f9b8e05d72Axel Lin if (ret) { 1302dcd9543a28da523a179a13b1eefa5f9b8e05d72Axel Lin dev_err(&hdev->dev, "force feedback init failed\n"); 1312dcd9543a28da523a179a13b1eefa5f9b8e05d72Axel Lin hid_hw_stop(hdev); 1322dcd9543a28da523a179a13b1eefa5f9b8e05d72Axel Lin goto err; 1332dcd9543a28da523a179a13b1eefa5f9b8e05d72Axel Lin } 13404561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 13504561c5aa243c98cae93cde27e05740df787e692Ignaz Forster return 0; 13604561c5aa243c98cae93cde27e05740df787e692Ignaz Forstererr: 13704561c5aa243c98cae93cde27e05740df787e692Ignaz Forster return ret; 13804561c5aa243c98cae93cde27e05740df787e692Ignaz Forster} 13904561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 14004561c5aa243c98cae93cde27e05740df787e692Ignaz Forsterstatic const struct hid_device_id ems_devices[] = { 14105ee28387946ca9936956a6e45f822c0c41dfc87Jiri Kosina { HID_USB_DEVICE(USB_VENDOR_ID_EMS, USB_DEVICE_ID_EMS_TRIO_LINKER_PLUS_II) }, 14204561c5aa243c98cae93cde27e05740df787e692Ignaz Forster { } 14304561c5aa243c98cae93cde27e05740df787e692Ignaz Forster}; 14404561c5aa243c98cae93cde27e05740df787e692Ignaz ForsterMODULE_DEVICE_TABLE(hid, ems_devices); 14504561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 14604561c5aa243c98cae93cde27e05740df787e692Ignaz Forsterstatic struct hid_driver ems_driver = { 14704561c5aa243c98cae93cde27e05740df787e692Ignaz Forster .name = "hkems", 14804561c5aa243c98cae93cde27e05740df787e692Ignaz Forster .id_table = ems_devices, 14904561c5aa243c98cae93cde27e05740df787e692Ignaz Forster .probe = ems_probe, 15004561c5aa243c98cae93cde27e05740df787e692Ignaz Forster}; 151f425458eafd51b6b5ab64f407922e1198c567cb2H Hartley Sweetenmodule_hid_driver(ems_driver); 15204561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 15304561c5aa243c98cae93cde27e05740df787e692Ignaz ForsterMODULE_LICENSE("GPL"); 15404561c5aa243c98cae93cde27e05740df787e692Ignaz Forster 155