1/* 2 * Force feedback support for hid-compliant for some of the devices from 3 * Logitech, namely: 4 * - WingMan Cordless RumblePad 5 * - WingMan Force 3D 6 * 7 * Copyright (c) 2002-2004 Johann Deneux 8 * Copyright (c) 2006 Anssi Hannula <anssi.hannula@gmail.com> 9 */ 10 11/* 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License as published by 14 * the Free Software Foundation; either version 2 of the License, or 15 * (at your option) any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with this program; if not, write to the Free Software 24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 25 * 26 * Should you need to contact me, the author, you can do so by 27 * e-mail - mail your message to <johann.deneux@it.uu.se> 28 */ 29 30#include <linux/input.h> 31#include <linux/usb.h> 32#include <linux/hid.h> 33#include "usbhid.h" 34 35struct dev_type { 36 u16 idVendor; 37 u16 idProduct; 38 const signed short *ff; 39}; 40 41static const signed short ff_rumble[] = { 42 FF_RUMBLE, 43 -1 44}; 45 46static const signed short ff_joystick[] = { 47 FF_CONSTANT, 48 -1 49}; 50 51static const struct dev_type devices[] = { 52 { 0x046d, 0xc211, ff_rumble }, 53 { 0x046d, 0xc219, ff_rumble }, 54 { 0x046d, 0xc283, ff_joystick }, 55 { 0x046d, 0xc286, ff_joystick }, 56 { 0x046d, 0xc294, ff_joystick }, 57 { 0x046d, 0xc295, ff_joystick }, 58 { 0x046d, 0xca03, ff_joystick }, 59}; 60 61static int hid_lgff_play(struct input_dev *dev, void *data, struct ff_effect *effect) 62{ 63 struct hid_device *hid = input_get_drvdata(dev); 64 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; 65 struct hid_report *report = list_entry(report_list->next, struct hid_report, list); 66 int x, y; 67 unsigned int left, right; 68 69#define CLAMP(x) if (x < 0) x = 0; if (x > 0xff) x = 0xff 70 71 switch (effect->type) { 72 case FF_CONSTANT: 73 x = effect->u.ramp.start_level + 0x7f; /* 0x7f is center */ 74 y = effect->u.ramp.end_level + 0x7f; 75 CLAMP(x); 76 CLAMP(y); 77 report->field[0]->value[0] = 0x51; 78 report->field[0]->value[1] = 0x08; 79 report->field[0]->value[2] = x; 80 report->field[0]->value[3] = y; 81 dbg("(x, y)=(%04x, %04x)", x, y); 82 usbhid_submit_report(hid, report, USB_DIR_OUT); 83 break; 84 85 case FF_RUMBLE: 86 right = effect->u.rumble.strong_magnitude; 87 left = effect->u.rumble.weak_magnitude; 88 right = right * 0xff / 0xffff; 89 left = left * 0xff / 0xffff; 90 CLAMP(left); 91 CLAMP(right); 92 report->field[0]->value[0] = 0x42; 93 report->field[0]->value[1] = 0x00; 94 report->field[0]->value[2] = left; 95 report->field[0]->value[3] = right; 96 dbg("(left, right)=(%04x, %04x)", left, right); 97 usbhid_submit_report(hid, report, USB_DIR_OUT); 98 break; 99 } 100 return 0; 101} 102 103int hid_lgff_init(struct hid_device* hid) 104{ 105 struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list); 106 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; 107 struct input_dev *dev = hidinput->input; 108 struct hid_report *report; 109 struct hid_field *field; 110 const signed short *ff_bits = ff_joystick; 111 int error; 112 int i; 113 114 /* Find the report to use */ 115 if (list_empty(report_list)) { 116 err("No output report found"); 117 return -1; 118 } 119 120 /* Check that the report looks ok */ 121 report = list_entry(report_list->next, struct hid_report, list); 122 if (!report) { 123 err("NULL output report"); 124 return -1; 125 } 126 127 field = report->field[0]; 128 if (!field) { 129 err("NULL field"); 130 return -1; 131 } 132 133 for (i = 0; i < ARRAY_SIZE(devices); i++) { 134 if (dev->id.vendor == devices[i].idVendor && 135 dev->id.product == devices[i].idProduct) { 136 ff_bits = devices[i].ff; 137 break; 138 } 139 } 140 141 for (i = 0; ff_bits[i] >= 0; i++) 142 set_bit(ff_bits[i], dev->ffbit); 143 144 error = input_ff_create_memless(dev, NULL, hid_lgff_play); 145 if (error) 146 return error; 147 148 printk(KERN_INFO "Force feedback for Logitech force feedback devices by Johann Deneux <johann.deneux@it.uu.se>\n"); 149 150 return 0; 151} 152