1 /* 2 * Force feedback support for Logitech Speed Force Wireless 3 * 4 * http://wiibrew.org/wiki/Logitech_USB_steering_wheel 5 * 6 * Copyright (c) 2010 Simon Wood <simon@mungewell.org> 7 */ 8 9 /* 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 23 */ 24 25 26 #include <linux/input.h> 27 #include <linux/usb.h> 28 #include <linux/hid.h> 29 30 #include "usbhid/usbhid.h" 31 #include "hid-lg.h" 32 #include "hid-ids.h" 33 34 #define DFGT_REV_MAJ 0x13 35 #define DFGT_REV_MIN 0x22 36 #define DFP_REV_MAJ 0x11 37 #define DFP_REV_MIN 0x06 38 #define FFEX_REV_MAJ 0x21 39 #define FFEX_REV_MIN 0x00 40 #define G25_REV_MAJ 0x12 41 #define G25_REV_MIN 0x22 42 #define G27_REV_MAJ 0x12 43 #define G27_REV_MIN 0x38 44 45 #define to_hid_device(pdev) container_of(pdev, struct hid_device, dev) 46 47 static void hid_lg4ff_set_range_dfp(struct hid_device *hid, u16 range); 48 static void hid_lg4ff_set_range_g25(struct hid_device *hid, u16 range); 49 static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr, char *buf); 50 static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count); 51 52 static DEVICE_ATTR(range, S_IRWXU | S_IRWXG | S_IRWXO, lg4ff_range_show, lg4ff_range_store); 53 54 static bool list_inited; 55 56 struct lg4ff_device_entry { 57 char *device_id; /* Use name in respective kobject structure's address as the ID */ 58 __u16 range; 59 __u16 min_range; 60 __u16 max_range; 61 __u8 leds; 62 struct list_head list; 63 void (*set_range)(struct hid_device *hid, u16 range); 64 }; 65 66 static struct lg4ff_device_entry device_list; 67 68 static const signed short lg4ff_wheel_effects[] = { 69 FF_CONSTANT, 70 FF_AUTOCENTER, 71 -1 72 }; 73 74 struct lg4ff_wheel { 75 const __u32 product_id; 76 const signed short *ff_effects; 77 const __u16 min_range; 78 const __u16 max_range; 79 void (*set_range)(struct hid_device *hid, u16 range); 80 }; 81 82 static const struct lg4ff_wheel lg4ff_devices[] = { 83 {USB_DEVICE_ID_LOGITECH_WHEEL, lg4ff_wheel_effects, 40, 270, NULL}, 84 {USB_DEVICE_ID_LOGITECH_MOMO_WHEEL, lg4ff_wheel_effects, 40, 270, NULL}, 85 {USB_DEVICE_ID_LOGITECH_DFP_WHEEL, lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_dfp}, 86 {USB_DEVICE_ID_LOGITECH_G25_WHEEL, lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_g25}, 87 {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL, lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_g25}, 88 {USB_DEVICE_ID_LOGITECH_G27_WHEEL, lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_g25}, 89 {USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2, lg4ff_wheel_effects, 40, 270, NULL}, 90 {USB_DEVICE_ID_LOGITECH_WII_WHEEL, lg4ff_wheel_effects, 40, 270, NULL} 91 }; 92 93 struct lg4ff_native_cmd { 94 const __u8 cmd_num; /* Number of commands to send */ 95 const __u8 cmd[]; 96 }; 97 98 struct lg4ff_usb_revision { 99 const __u16 rev_maj; 100 const __u16 rev_min; 101 const struct lg4ff_native_cmd *command; 102 }; 103 104 static const struct lg4ff_native_cmd native_dfp = { 105 1, 106 {0xf8, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00} 107 }; 108 109 static const struct lg4ff_native_cmd native_dfgt = { 110 2, 111 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* 1st command */ 112 0xf8, 0x09, 0x03, 0x01, 0x00, 0x00, 0x00} /* 2nd command */ 113 }; 114 115 static const struct lg4ff_native_cmd native_g25 = { 116 1, 117 {0xf8, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00} 118 }; 119 120 static const struct lg4ff_native_cmd native_g27 = { 121 2, 122 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* 1st command */ 123 0xf8, 0x09, 0x04, 0x01, 0x00, 0x00, 0x00} /* 2nd command */ 124 }; 125 126 static const struct lg4ff_usb_revision lg4ff_revs[] = { 127 {DFGT_REV_MAJ, DFGT_REV_MIN, &native_dfgt}, /* Driving Force GT */ 128 {DFP_REV_MAJ, DFP_REV_MIN, &native_dfp}, /* Driving Force Pro */ 129 {G25_REV_MAJ, G25_REV_MIN, &native_g25}, /* G25 */ 130 {G27_REV_MAJ, G27_REV_MIN, &native_g27}, /* G27 */ 131 }; 132 133 static int hid_lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *effect) 134 { 135 struct hid_device *hid = input_get_drvdata(dev); 136 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; 137 struct hid_report *report = list_entry(report_list->next, struct hid_report, list); 138 int x; 139 140 #define CLAMP(x) if (x < 0) x = 0; if (x > 0xff) x = 0xff 141 142 switch (effect->type) { 143 case FF_CONSTANT: 144 x = effect->u.ramp.start_level + 0x80; /* 0x80 is no force */ 145 CLAMP(x); 146 report->field[0]->value[0] = 0x11; /* Slot 1 */ 147 report->field[0]->value[1] = 0x08; 148 report->field[0]->value[2] = x; 149 report->field[0]->value[3] = 0x80; 150 report->field[0]->value[4] = 0x00; 151 report->field[0]->value[5] = 0x00; 152 report->field[0]->value[6] = 0x00; 153 154 usbhid_submit_report(hid, report, USB_DIR_OUT); 155 break; 156 } 157 return 0; 158 } 159 160 /* Sends default autocentering command compatible with 161 * all wheels except Formula Force EX */ 162 static void hid_lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitude) 163 { 164 struct hid_device *hid = input_get_drvdata(dev); 165 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; 166 struct hid_report *report = list_entry(report_list->next, struct hid_report, list); 167 168 report->field[0]->value[0] = 0xfe; 169 report->field[0]->value[1] = 0x0d; 170 report->field[0]->value[2] = magnitude >> 13; 171 report->field[0]->value[3] = magnitude >> 13; 172 report->field[0]->value[4] = magnitude >> 8; 173 report->field[0]->value[5] = 0x00; 174 report->field[0]->value[6] = 0x00; 175 176 usbhid_submit_report(hid, report, USB_DIR_OUT); 177 } 178 179 /* Sends autocentering command compatible with Formula Force EX */ 180 static void hid_lg4ff_set_autocenter_ffex(struct input_dev *dev, u16 magnitude) 181 { 182 struct hid_device *hid = input_get_drvdata(dev); 183 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; 184 struct hid_report *report = list_entry(report_list->next, struct hid_report, list); 185 magnitude = magnitude * 90 / 65535; 186 187 188 report->field[0]->value[0] = 0xfe; 189 report->field[0]->value[1] = 0x03; 190 report->field[0]->value[2] = magnitude >> 14; 191 report->field[0]->value[3] = magnitude >> 14; 192 report->field[0]->value[4] = magnitude; 193 report->field[0]->value[5] = 0x00; 194 report->field[0]->value[6] = 0x00; 195 196 usbhid_submit_report(hid, report, USB_DIR_OUT); 197 } 198 199 /* Sends command to set range compatible with G25/G27/Driving Force GT */ 200 static void hid_lg4ff_set_range_g25(struct hid_device *hid, u16 range) 201 { 202 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; 203 struct hid_report *report = list_entry(report_list->next, struct hid_report, list); 204 dbg_hid("G25/G27/DFGT: setting range to %u\n", range); 205 206 report->field[0]->value[0] = 0xf8; 207 report->field[0]->value[1] = 0x81; 208 report->field[0]->value[2] = range & 0x00ff; 209 report->field[0]->value[3] = (range & 0xff00) >> 8; 210 report->field[0]->value[4] = 0x00; 211 report->field[0]->value[5] = 0x00; 212 report->field[0]->value[6] = 0x00; 213 214 usbhid_submit_report(hid, report, USB_DIR_OUT); 215 } 216 217 /* Sends commands to set range compatible with Driving Force Pro wheel */ 218 static void hid_lg4ff_set_range_dfp(struct hid_device *hid, __u16 range) 219 { 220 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; 221 struct hid_report *report = list_entry(report_list->next, struct hid_report, list); 222 int start_left, start_right, full_range; 223 dbg_hid("Driving Force Pro: setting range to %u\n", range); 224 225 /* Prepare "coarse" limit command */ 226 report->field[0]->value[0] = 0xf8; 227 report->field[0]->value[1] = 0x00; /* Set later */ 228 report->field[0]->value[2] = 0x00; 229 report->field[0]->value[3] = 0x00; 230 report->field[0]->value[4] = 0x00; 231 report->field[0]->value[5] = 0x00; 232 report->field[0]->value[6] = 0x00; 233 234 if (range > 200) { 235 report->field[0]->value[1] = 0x03; 236 full_range = 900; 237 } else { 238 report->field[0]->value[1] = 0x02; 239 full_range = 200; 240 } 241 usbhid_submit_report(hid, report, USB_DIR_OUT); 242 243 /* Prepare "fine" limit command */ 244 report->field[0]->value[0] = 0x81; 245 report->field[0]->value[1] = 0x0b; 246 report->field[0]->value[2] = 0x00; 247 report->field[0]->value[3] = 0x00; 248 report->field[0]->value[4] = 0x00; 249 report->field[0]->value[5] = 0x00; 250 report->field[0]->value[6] = 0x00; 251 252 if (range == 200 || range == 900) { /* Do not apply any fine limit */ 253 usbhid_submit_report(hid, report, USB_DIR_OUT); 254 return; 255 } 256 257 /* Construct fine limit command */ 258 start_left = (((full_range - range + 1) * 2047) / full_range); 259 start_right = 0xfff - start_left; 260 261 report->field[0]->value[2] = start_left >> 4; 262 report->field[0]->value[3] = start_right >> 4; 263 report->field[0]->value[4] = 0xff; 264 report->field[0]->value[5] = (start_right & 0xe) << 4 | (start_left & 0xe); 265 report->field[0]->value[6] = 0xff; 266 267 usbhid_submit_report(hid, report, USB_DIR_OUT); 268 } 269 270 static void hid_lg4ff_switch_native(struct hid_device *hid, const struct lg4ff_native_cmd *cmd) 271 { 272 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; 273 struct hid_report *report = list_entry(report_list->next, struct hid_report, list); 274 __u8 i, j; 275 276 j = 0; 277 while (j < 7*cmd->cmd_num) { 278 for (i = 0; i < 7; i++) 279 report->field[0]->value[i] = cmd->cmd[j++]; 280 281 usbhid_submit_report(hid, report, USB_DIR_OUT); 282 } 283 } 284 285 /* Read current range and display it in terminal */ 286 static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr, char *buf) 287 { 288 struct lg4ff_device_entry *uninitialized_var(entry); 289 struct list_head *h; 290 struct hid_device *hid = to_hid_device(dev); 291 size_t count; 292 293 list_for_each(h, &device_list.list) { 294 entry = list_entry(h, struct lg4ff_device_entry, list); 295 if (strcmp(entry->device_id, (&hid->dev)->kobj.name) == 0) 296 break; 297 } 298 if (h == &device_list.list) { 299 dbg_hid("Device not found!"); 300 return 0; 301 } 302 303 count = scnprintf(buf, PAGE_SIZE, "%u\n", entry->range); 304 return count; 305 } 306 307 /* Set range to user specified value, call appropriate function 308 * according to the type of the wheel */ 309 static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 310 { 311 struct lg4ff_device_entry *uninitialized_var(entry); 312 struct list_head *h; 313 struct hid_device *hid = to_hid_device(dev); 314 __u16 range = simple_strtoul(buf, NULL, 10); 315 316 list_for_each(h, &device_list.list) { 317 entry = list_entry(h, struct lg4ff_device_entry, list); 318 if (strcmp(entry->device_id, (&hid->dev)->kobj.name) == 0) 319 break; 320 } 321 if (h == &device_list.list) { 322 dbg_hid("Device not found!"); 323 return count; 324 } 325 326 if (range == 0) 327 range = entry->max_range; 328 329 /* Check if the wheel supports range setting 330 * and that the range is within limits for the wheel */ 331 if (entry->set_range != NULL && range >= entry->min_range && range <= entry->max_range) { 332 entry->set_range(hid, range); 333 entry->range = range; 334 } 335 336 return count; 337 } 338 339 int lg4ff_init(struct hid_device *hid) 340 { 341 struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list); 342 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; 343 struct input_dev *dev = hidinput->input; 344 struct hid_report *report; 345 struct hid_field *field; 346 struct lg4ff_device_entry *entry; 347 struct usb_device_descriptor *udesc; 348 int error, i, j; 349 __u16 bcdDevice, rev_maj, rev_min; 350 351 /* Find the report to use */ 352 if (list_empty(report_list)) { 353 hid_err(hid, "No output report found\n"); 354 return -1; 355 } 356 357 /* Check that the report looks ok */ 358 report = list_entry(report_list->next, struct hid_report, list); 359 if (!report) { 360 hid_err(hid, "NULL output report\n"); 361 return -1; 362 } 363 364 field = report->field[0]; 365 if (!field) { 366 hid_err(hid, "NULL field\n"); 367 return -1; 368 } 369 370 /* Check what wheel has been connected */ 371 for (i = 0; i < ARRAY_SIZE(lg4ff_devices); i++) { 372 if (hid->product == lg4ff_devices[i].product_id) { 373 dbg_hid("Found compatible device, product ID %04X\n", lg4ff_devices[i].product_id); 374 break; 375 } 376 } 377 378 if (i == ARRAY_SIZE(lg4ff_devices)) { 379 hid_err(hid, "Device is not supported by lg4ff driver. If you think it should be, consider reporting a bug to" 380 "LKML, Simon Wood <simon@mungewell.org> or Michal Maly <madcatxster@gmail.com>\n"); 381 return -1; 382 } 383 384 /* Attempt to switch wheel to native mode when applicable */ 385 udesc = &(hid_to_usb_dev(hid)->descriptor); 386 if (!udesc) { 387 hid_err(hid, "NULL USB device descriptor\n"); 388 return -1; 389 } 390 bcdDevice = le16_to_cpu(udesc->bcdDevice); 391 rev_maj = bcdDevice >> 8; 392 rev_min = bcdDevice & 0xff; 393 394 if (lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_WHEEL) { 395 dbg_hid("Generic wheel detected, can it do native?\n"); 396 dbg_hid("USB revision: %2x.%02x\n", rev_maj, rev_min); 397 398 for (j = 0; j < ARRAY_SIZE(lg4ff_revs); j++) { 399 if (lg4ff_revs[j].rev_maj == rev_maj && lg4ff_revs[j].rev_min == rev_min) { 400 hid_lg4ff_switch_native(hid, lg4ff_revs[j].command); 401 hid_info(hid, "Switched to native mode\n"); 402 } 403 } 404 } 405 406 /* Set supported force feedback capabilities */ 407 for (j = 0; lg4ff_devices[i].ff_effects[j] >= 0; j++) 408 set_bit(lg4ff_devices[i].ff_effects[j], dev->ffbit); 409 410 error = input_ff_create_memless(dev, NULL, hid_lg4ff_play); 411 412 if (error) 413 return error; 414 415 /* Check if autocentering is available and 416 * set the centering force to zero by default */ 417 if (test_bit(FF_AUTOCENTER, dev->ffbit)) { 418 if(rev_maj == FFEX_REV_MAJ && rev_min == FFEX_REV_MIN) /* Formula Force EX expects different autocentering command */ 419 dev->ff->set_autocenter = hid_lg4ff_set_autocenter_ffex; 420 else 421 dev->ff->set_autocenter = hid_lg4ff_set_autocenter_default; 422 423 dev->ff->set_autocenter(dev, 0); 424 } 425 426 /* Initialize device_list if this is the first device to handle by lg4ff */ 427 if (!list_inited) { 428 INIT_LIST_HEAD(&device_list.list); 429 list_inited = 1; 430 } 431 432 /* Add the device to device_list */ 433 entry = kzalloc(sizeof(struct lg4ff_device_entry), GFP_KERNEL); 434 if (!entry) { 435 hid_err(hid, "Cannot add device, insufficient memory.\n"); 436 return -ENOMEM; 437 } 438 entry->device_id = kstrdup((&hid->dev)->kobj.name, GFP_KERNEL); 439 if (!entry->device_id) { 440 hid_err(hid, "Cannot set device_id, insufficient memory.\n"); 441 kfree(entry); 442 return -ENOMEM; 443 } 444 entry->min_range = lg4ff_devices[i].min_range; 445 entry->max_range = lg4ff_devices[i].max_range; 446 entry->set_range = lg4ff_devices[i].set_range; 447 list_add(&entry->list, &device_list.list); 448 449 /* Create sysfs interface */ 450 error = device_create_file(&hid->dev, &dev_attr_range); 451 if (error) 452 return error; 453 dbg_hid("sysfs interface created\n"); 454 455 /* Set the maximum range to start with */ 456 entry->range = entry->max_range; 457 if (entry->set_range != NULL) 458 entry->set_range(hid, entry->range); 459 460 hid_info(hid, "Force feedback for Logitech Speed Force Wireless by Simon Wood <simon@mungewell.org>\n"); 461 return 0; 462 } 463 464 int lg4ff_deinit(struct hid_device *hid) 465 { 466 bool found = 0; 467 struct lg4ff_device_entry *entry; 468 struct list_head *h, *g; 469 list_for_each_safe(h, g, &device_list.list) { 470 entry = list_entry(h, struct lg4ff_device_entry, list); 471 if (strcmp(entry->device_id, (&hid->dev)->kobj.name) == 0) { 472 list_del(h); 473 kfree(entry->device_id); 474 kfree(entry); 475 found = 1; 476 break; 477 } 478 } 479 480 if (!found) { 481 dbg_hid("Device entry not found!\n"); 482 return -1; 483 } 484 485 device_remove_file(&hid->dev, &dev_attr_range); 486 dbg_hid("Device successfully unregistered\n"); 487 return 0; 488 } 489