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