1/* 2 * Force feedback support for Zeroplus based devices 3 * 4 * Copyright (c) 2005, 2006 Anssi Hannula <anssi.hannula@gmail.com> 5 */ 6 7/* 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 */ 22 23 24#include <linux/hid.h> 25#include <linux/input.h> 26#include <linux/slab.h> 27#include <linux/usb.h> 28 29#include "hid-ids.h" 30 31#ifdef CONFIG_ZEROPLUS_FF 32#include "usbhid/usbhid.h" 33 34struct zpff_device { 35 struct hid_report *report; 36}; 37 38static int zpff_play(struct input_dev *dev, void *data, 39 struct ff_effect *effect) 40{ 41 struct hid_device *hid = input_get_drvdata(dev); 42 struct zpff_device *zpff = data; 43 int left, right; 44 45 /* 46 * The following is specified the other way around in the Zeroplus 47 * datasheet but the order below is correct for the XFX Executioner; 48 * however it is possible that the XFX Executioner is an exception 49 */ 50 51 left = effect->u.rumble.strong_magnitude; 52 right = effect->u.rumble.weak_magnitude; 53 dbg_hid("called with 0x%04x 0x%04x\n", left, right); 54 55 left = left * 0x7f / 0xffff; 56 right = right * 0x7f / 0xffff; 57 58 zpff->report->field[2]->value[0] = left; 59 zpff->report->field[3]->value[0] = right; 60 dbg_hid("running with 0x%02x 0x%02x\n", left, right); 61 usbhid_submit_report(hid, zpff->report, USB_DIR_OUT); 62 63 return 0; 64} 65 66static int zpff_init(struct hid_device *hid) 67{ 68 struct zpff_device *zpff; 69 struct hid_report *report; 70 struct hid_input *hidinput = list_entry(hid->inputs.next, 71 struct hid_input, list); 72 struct list_head *report_list = 73 &hid->report_enum[HID_OUTPUT_REPORT].report_list; 74 struct input_dev *dev = hidinput->input; 75 int error; 76 77 if (list_empty(report_list)) { 78 dev_err(&hid->dev, "no output report found\n"); 79 return -ENODEV; 80 } 81 82 report = list_entry(report_list->next, struct hid_report, list); 83 84 if (report->maxfield < 4) { 85 dev_err(&hid->dev, "not enough fields in report\n"); 86 return -ENODEV; 87 } 88 89 zpff = kzalloc(sizeof(struct zpff_device), GFP_KERNEL); 90 if (!zpff) 91 return -ENOMEM; 92 93 set_bit(FF_RUMBLE, dev->ffbit); 94 95 error = input_ff_create_memless(dev, zpff, zpff_play); 96 if (error) { 97 kfree(zpff); 98 return error; 99 } 100 101 zpff->report = report; 102 zpff->report->field[0]->value[0] = 0x00; 103 zpff->report->field[1]->value[0] = 0x02; 104 zpff->report->field[2]->value[0] = 0x00; 105 zpff->report->field[3]->value[0] = 0x00; 106 usbhid_submit_report(hid, zpff->report, USB_DIR_OUT); 107 108 dev_info(&hid->dev, "force feedback for Zeroplus based devices by " 109 "Anssi Hannula <anssi.hannula@gmail.com>\n"); 110 111 return 0; 112} 113#else 114static inline int zpff_init(struct hid_device *hid) 115{ 116 return 0; 117} 118#endif 119 120static int zp_probe(struct hid_device *hdev, const struct hid_device_id *id) 121{ 122 int ret; 123 124 ret = hid_parse(hdev); 125 if (ret) { 126 dev_err(&hdev->dev, "parse failed\n"); 127 goto err; 128 } 129 130 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); 131 if (ret) { 132 dev_err(&hdev->dev, "hw start failed\n"); 133 goto err; 134 } 135 136 zpff_init(hdev); 137 138 return 0; 139err: 140 return ret; 141} 142 143static const struct hid_device_id zp_devices[] = { 144 { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0005) }, 145 { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0030) }, 146 { } 147}; 148MODULE_DEVICE_TABLE(hid, zp_devices); 149 150static struct hid_driver zp_driver = { 151 .name = "zeroplus", 152 .id_table = zp_devices, 153 .probe = zp_probe, 154}; 155 156static int __init zp_init(void) 157{ 158 return hid_register_driver(&zp_driver); 159} 160 161static void __exit zp_exit(void) 162{ 163 hid_unregister_driver(&zp_driver); 164} 165 166module_init(zp_init); 167module_exit(zp_exit); 168MODULE_LICENSE("GPL"); 169