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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 31 32 #include <linux/input.h> 33 #include <linux/usb.h> 34 #include <linux/hid.h> 35 36 #include "usbhid/usbhid.h" 37 #include "hid-lg.h" 38 39 struct dev_type { 40 u16 idVendor; 41 u16 idProduct; 42 const signed short *ff; 43 }; 44 45 static const signed short ff_rumble[] = { 46 FF_RUMBLE, 47 -1 48 }; 49 50 static const signed short ff_joystick[] = { 51 FF_CONSTANT, 52 -1 53 }; 54 55 static const signed short ff_joystick_ac[] = { 56 FF_CONSTANT, 57 FF_AUTOCENTER, 58 -1 59 }; 60 61 static const signed short ff_wheel[] = { 62 FF_CONSTANT, 63 FF_AUTOCENTER, 64 -1 65 }; 66 67 static const struct dev_type devices[] = { 68 { 0x046d, 0xc211, ff_rumble }, 69 { 0x046d, 0xc219, ff_rumble }, 70 { 0x046d, 0xc283, ff_joystick }, 71 { 0x046d, 0xc286, ff_joystick_ac }, 72 { 0x046d, 0xc287, ff_joystick_ac }, 73 { 0x046d, 0xc293, ff_joystick }, 74 { 0x046d, 0xc294, ff_wheel }, 75 { 0x046d, 0xc298, ff_wheel }, 76 { 0x046d, 0xc299, ff_wheel }, 77 { 0x046d, 0xc29b, ff_wheel }, 78 { 0x046d, 0xc295, ff_joystick }, 79 { 0x046d, 0xc298, ff_wheel }, 80 { 0x046d, 0xc299, ff_wheel }, 81 { 0x046d, 0xca03, ff_wheel }, 82 }; 83 84 static int hid_lgff_play(struct input_dev *dev, void *data, struct ff_effect *effect) 85 { 86 struct hid_device *hid = input_get_drvdata(dev); 87 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; 88 struct hid_report *report = list_entry(report_list->next, struct hid_report, list); 89 int x, y; 90 unsigned int left, right; 91 92 #define CLAMP(x) if (x < 0) x = 0; if (x > 0xff) x = 0xff 93 94 switch (effect->type) { 95 case FF_CONSTANT: 96 x = effect->u.ramp.start_level + 0x7f; /* 0x7f is center */ 97 y = effect->u.ramp.end_level + 0x7f; 98 CLAMP(x); 99 CLAMP(y); 100 report->field[0]->value[0] = 0x51; 101 report->field[0]->value[1] = 0x08; 102 report->field[0]->value[2] = x; 103 report->field[0]->value[3] = y; 104 dbg_hid("(x, y)=(%04x, %04x)\n", x, y); 105 usbhid_submit_report(hid, report, USB_DIR_OUT); 106 break; 107 108 case FF_RUMBLE: 109 right = effect->u.rumble.strong_magnitude; 110 left = effect->u.rumble.weak_magnitude; 111 right = right * 0xff / 0xffff; 112 left = left * 0xff / 0xffff; 113 CLAMP(left); 114 CLAMP(right); 115 report->field[0]->value[0] = 0x42; 116 report->field[0]->value[1] = 0x00; 117 report->field[0]->value[2] = left; 118 report->field[0]->value[3] = right; 119 dbg_hid("(left, right)=(%04x, %04x)\n", left, right); 120 usbhid_submit_report(hid, report, USB_DIR_OUT); 121 break; 122 } 123 return 0; 124 } 125 126 static void hid_lgff_set_autocenter(struct input_dev *dev, u16 magnitude) 127 { 128 struct hid_device *hid = input_get_drvdata(dev); 129 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; 130 struct hid_report *report = list_entry(report_list->next, struct hid_report, list); 131 __s32 *value = report->field[0]->value; 132 magnitude = (magnitude >> 12) & 0xf; 133 *value++ = 0xfe; 134 *value++ = 0x0d; 135 *value++ = magnitude; /* clockwise strength */ 136 *value++ = magnitude; /* counter-clockwise strength */ 137 *value++ = 0x80; 138 *value++ = 0x00; 139 *value = 0x00; 140 usbhid_submit_report(hid, report, USB_DIR_OUT); 141 } 142 143 int lgff_init(struct hid_device* hid) 144 { 145 struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list); 146 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; 147 struct input_dev *dev = hidinput->input; 148 struct hid_report *report; 149 struct hid_field *field; 150 const signed short *ff_bits = ff_joystick; 151 int error; 152 int i; 153 154 /* Find the report to use */ 155 if (list_empty(report_list)) { 156 hid_err(hid, "No output report found\n"); 157 return -1; 158 } 159 160 /* Check that the report looks ok */ 161 report = list_entry(report_list->next, struct hid_report, list); 162 field = report->field[0]; 163 if (!field) { 164 hid_err(hid, "NULL field\n"); 165 return -1; 166 } 167 168 for (i = 0; i < ARRAY_SIZE(devices); i++) { 169 if (dev->id.vendor == devices[i].idVendor && 170 dev->id.product == devices[i].idProduct) { 171 ff_bits = devices[i].ff; 172 break; 173 } 174 } 175 176 for (i = 0; ff_bits[i] >= 0; i++) 177 set_bit(ff_bits[i], dev->ffbit); 178 179 error = input_ff_create_memless(dev, NULL, hid_lgff_play); 180 if (error) 181 return error; 182 183 if ( test_bit(FF_AUTOCENTER, dev->ffbit) ) 184 dev->ff->set_autocenter = hid_lgff_set_autocenter; 185 186 pr_info("Force feedback for Logitech force feedback devices by Johann Deneux <johann.deneux@it.uu.se>\n"); 187 188 return 0; 189 } 190