1/* 2 * Copyright (c) 2000-2002 Vojtech Pavlik <vojtech@ucw.cz> 3 * Copyright (c) 2001-2002, 2007 Johann Deneux <johann.deneux@gmail.com> 4 * 5 * USB/RS232 I-Force joysticks and wheels. 6 */ 7 8/* 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 * 23 * Should you need to contact me, the author, you can do so either by 24 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: 25 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic 26 */ 27 28#include "iforce.h" 29 30/* 31 * Set the magnitude of a constant force effect 32 * Return error code 33 * 34 * Note: caller must ensure exclusive access to device 35 */ 36 37static int make_magnitude_modifier(struct iforce* iforce, 38 struct resource* mod_chunk, int no_alloc, __s16 level) 39{ 40 unsigned char data[3]; 41 42 if (!no_alloc) { 43 mutex_lock(&iforce->mem_mutex); 44 if (allocate_resource(&(iforce->device_memory), mod_chunk, 2, 45 iforce->device_memory.start, iforce->device_memory.end, 2L, 46 NULL, NULL)) { 47 mutex_unlock(&iforce->mem_mutex); 48 return -ENOSPC; 49 } 50 mutex_unlock(&iforce->mem_mutex); 51 } 52 53 data[0] = LO(mod_chunk->start); 54 data[1] = HI(mod_chunk->start); 55 data[2] = HIFIX80(level); 56 57 iforce_send_packet(iforce, FF_CMD_MAGNITUDE, data); 58 59 iforce_dump_packet("magnitude: ", FF_CMD_MAGNITUDE, data); 60 return 0; 61} 62 63/* 64 * Upload the component of an effect dealing with the period, phase and magnitude 65 */ 66 67static int make_period_modifier(struct iforce* iforce, 68 struct resource* mod_chunk, int no_alloc, 69 __s16 magnitude, __s16 offset, u16 period, u16 phase) 70{ 71 unsigned char data[7]; 72 73 period = TIME_SCALE(period); 74 75 if (!no_alloc) { 76 mutex_lock(&iforce->mem_mutex); 77 if (allocate_resource(&(iforce->device_memory), mod_chunk, 0x0c, 78 iforce->device_memory.start, iforce->device_memory.end, 2L, 79 NULL, NULL)) { 80 mutex_unlock(&iforce->mem_mutex); 81 return -ENOSPC; 82 } 83 mutex_unlock(&iforce->mem_mutex); 84 } 85 86 data[0] = LO(mod_chunk->start); 87 data[1] = HI(mod_chunk->start); 88 89 data[2] = HIFIX80(magnitude); 90 data[3] = HIFIX80(offset); 91 data[4] = HI(phase); 92 93 data[5] = LO(period); 94 data[6] = HI(period); 95 96 iforce_send_packet(iforce, FF_CMD_PERIOD, data); 97 98 return 0; 99} 100 101/* 102 * Uploads the part of an effect setting the envelope of the force 103 */ 104 105static int make_envelope_modifier(struct iforce* iforce, 106 struct resource* mod_chunk, int no_alloc, 107 u16 attack_duration, __s16 initial_level, 108 u16 fade_duration, __s16 final_level) 109{ 110 unsigned char data[8]; 111 112 attack_duration = TIME_SCALE(attack_duration); 113 fade_duration = TIME_SCALE(fade_duration); 114 115 if (!no_alloc) { 116 mutex_lock(&iforce->mem_mutex); 117 if (allocate_resource(&(iforce->device_memory), mod_chunk, 0x0e, 118 iforce->device_memory.start, iforce->device_memory.end, 2L, 119 NULL, NULL)) { 120 mutex_unlock(&iforce->mem_mutex); 121 return -ENOSPC; 122 } 123 mutex_unlock(&iforce->mem_mutex); 124 } 125 126 data[0] = LO(mod_chunk->start); 127 data[1] = HI(mod_chunk->start); 128 129 data[2] = LO(attack_duration); 130 data[3] = HI(attack_duration); 131 data[4] = HI(initial_level); 132 133 data[5] = LO(fade_duration); 134 data[6] = HI(fade_duration); 135 data[7] = HI(final_level); 136 137 iforce_send_packet(iforce, FF_CMD_ENVELOPE, data); 138 139 return 0; 140} 141 142/* 143 * Component of spring, friction, inertia... effects 144 */ 145 146static int make_condition_modifier(struct iforce* iforce, 147 struct resource* mod_chunk, int no_alloc, 148 __u16 rsat, __u16 lsat, __s16 rk, __s16 lk, u16 db, __s16 center) 149{ 150 unsigned char data[10]; 151 152 if (!no_alloc) { 153 mutex_lock(&iforce->mem_mutex); 154 if (allocate_resource(&(iforce->device_memory), mod_chunk, 8, 155 iforce->device_memory.start, iforce->device_memory.end, 2L, 156 NULL, NULL)) { 157 mutex_unlock(&iforce->mem_mutex); 158 return -ENOSPC; 159 } 160 mutex_unlock(&iforce->mem_mutex); 161 } 162 163 data[0] = LO(mod_chunk->start); 164 data[1] = HI(mod_chunk->start); 165 166 data[2] = (100 * rk) >> 15; /* Dangerous: the sign is extended by gcc on plateforms providing an arith shift */ 167 data[3] = (100 * lk) >> 15; /* This code is incorrect on cpus lacking arith shift */ 168 169 center = (500 * center) >> 15; 170 data[4] = LO(center); 171 data[5] = HI(center); 172 173 db = (1000 * db) >> 16; 174 data[6] = LO(db); 175 data[7] = HI(db); 176 177 data[8] = (100 * rsat) >> 16; 178 data[9] = (100 * lsat) >> 16; 179 180 iforce_send_packet(iforce, FF_CMD_CONDITION, data); 181 iforce_dump_packet("condition", FF_CMD_CONDITION, data); 182 183 return 0; 184} 185 186static unsigned char find_button(struct iforce *iforce, signed short button) 187{ 188 int i; 189 190 for (i = 1; iforce->type->btn[i] >= 0; i++) 191 if (iforce->type->btn[i] == button) 192 return i + 1; 193 return 0; 194} 195 196/* 197 * Analyse the changes in an effect, and tell if we need to send an condition 198 * parameter packet 199 */ 200static int need_condition_modifier(struct iforce *iforce, 201 struct ff_effect *old, 202 struct ff_effect *new) 203{ 204 int ret = 0; 205 int i; 206 207 if (new->type != FF_SPRING && new->type != FF_FRICTION) { 208 dev_warn(&iforce->dev->dev, "bad effect type in %s\n", 209 __func__); 210 return 0; 211 } 212 213 for (i = 0; i < 2; i++) { 214 ret |= old->u.condition[i].right_saturation != new->u.condition[i].right_saturation 215 || old->u.condition[i].left_saturation != new->u.condition[i].left_saturation 216 || old->u.condition[i].right_coeff != new->u.condition[i].right_coeff 217 || old->u.condition[i].left_coeff != new->u.condition[i].left_coeff 218 || old->u.condition[i].deadband != new->u.condition[i].deadband 219 || old->u.condition[i].center != new->u.condition[i].center; 220 } 221 return ret; 222} 223 224/* 225 * Analyse the changes in an effect, and tell if we need to send a magnitude 226 * parameter packet 227 */ 228static int need_magnitude_modifier(struct iforce *iforce, 229 struct ff_effect *old, 230 struct ff_effect *effect) 231{ 232 if (effect->type != FF_CONSTANT) { 233 dev_warn(&iforce->dev->dev, "bad effect type in %s\n", 234 __func__); 235 return 0; 236 } 237 238 return old->u.constant.level != effect->u.constant.level; 239} 240 241/* 242 * Analyse the changes in an effect, and tell if we need to send an envelope 243 * parameter packet 244 */ 245static int need_envelope_modifier(struct iforce *iforce, struct ff_effect *old, 246 struct ff_effect *effect) 247{ 248 switch (effect->type) { 249 case FF_CONSTANT: 250 if (old->u.constant.envelope.attack_length != effect->u.constant.envelope.attack_length 251 || old->u.constant.envelope.attack_level != effect->u.constant.envelope.attack_level 252 || old->u.constant.envelope.fade_length != effect->u.constant.envelope.fade_length 253 || old->u.constant.envelope.fade_level != effect->u.constant.envelope.fade_level) 254 return 1; 255 break; 256 257 case FF_PERIODIC: 258 if (old->u.periodic.envelope.attack_length != effect->u.periodic.envelope.attack_length 259 || old->u.periodic.envelope.attack_level != effect->u.periodic.envelope.attack_level 260 || old->u.periodic.envelope.fade_length != effect->u.periodic.envelope.fade_length 261 || old->u.periodic.envelope.fade_level != effect->u.periodic.envelope.fade_level) 262 return 1; 263 break; 264 265 default: 266 dev_warn(&iforce->dev->dev, "bad effect type in %s\n", 267 __func__); 268 } 269 270 return 0; 271} 272 273/* 274 * Analyse the changes in an effect, and tell if we need to send a periodic 275 * parameter effect 276 */ 277static int need_period_modifier(struct iforce *iforce, struct ff_effect *old, 278 struct ff_effect *new) 279{ 280 if (new->type != FF_PERIODIC) { 281 dev_warn(&iforce->dev->dev, "bad effect type in %s\n", 282 __func__); 283 return 0; 284 } 285 return (old->u.periodic.period != new->u.periodic.period 286 || old->u.periodic.magnitude != new->u.periodic.magnitude 287 || old->u.periodic.offset != new->u.periodic.offset 288 || old->u.periodic.phase != new->u.periodic.phase); 289} 290 291/* 292 * Analyse the changes in an effect, and tell if we need to send an effect 293 * packet 294 */ 295static int need_core(struct ff_effect *old, struct ff_effect *new) 296{ 297 if (old->direction != new->direction 298 || old->trigger.button != new->trigger.button 299 || old->trigger.interval != new->trigger.interval 300 || old->replay.length != new->replay.length 301 || old->replay.delay != new->replay.delay) 302 return 1; 303 304 return 0; 305} 306/* 307 * Send the part common to all effects to the device 308 */ 309static int make_core(struct iforce* iforce, u16 id, u16 mod_id1, u16 mod_id2, 310 u8 effect_type, u8 axes, u16 duration, u16 delay, u16 button, 311 u16 interval, u16 direction) 312{ 313 unsigned char data[14]; 314 315 duration = TIME_SCALE(duration); 316 delay = TIME_SCALE(delay); 317 interval = TIME_SCALE(interval); 318 319 data[0] = LO(id); 320 data[1] = effect_type; 321 data[2] = LO(axes) | find_button(iforce, button); 322 323 data[3] = LO(duration); 324 data[4] = HI(duration); 325 326 data[5] = HI(direction); 327 328 data[6] = LO(interval); 329 data[7] = HI(interval); 330 331 data[8] = LO(mod_id1); 332 data[9] = HI(mod_id1); 333 data[10] = LO(mod_id2); 334 data[11] = HI(mod_id2); 335 336 data[12] = LO(delay); 337 data[13] = HI(delay); 338 339 /* Stop effect */ 340/* iforce_control_playback(iforce, id, 0);*/ 341 342 iforce_send_packet(iforce, FF_CMD_EFFECT, data); 343 344 /* If needed, restart effect */ 345 if (test_bit(FF_CORE_SHOULD_PLAY, iforce->core_effects[id].flags)) { 346 /* BUG: perhaps we should replay n times, instead of 1. But we do not know n */ 347 iforce_control_playback(iforce, id, 1); 348 } 349 350 return 0; 351} 352 353/* 354 * Upload a periodic effect to the device 355 * See also iforce_upload_constant. 356 */ 357int iforce_upload_periodic(struct iforce *iforce, struct ff_effect *effect, struct ff_effect *old) 358{ 359 u8 wave_code; 360 int core_id = effect->id; 361 struct iforce_core_effect* core_effect = iforce->core_effects + core_id; 362 struct resource* mod1_chunk = &(iforce->core_effects[core_id].mod1_chunk); 363 struct resource* mod2_chunk = &(iforce->core_effects[core_id].mod2_chunk); 364 int param1_err = 1; 365 int param2_err = 1; 366 int core_err = 0; 367 368 if (!old || need_period_modifier(iforce, old, effect)) { 369 param1_err = make_period_modifier(iforce, mod1_chunk, 370 old != NULL, 371 effect->u.periodic.magnitude, effect->u.periodic.offset, 372 effect->u.periodic.period, effect->u.periodic.phase); 373 if (param1_err) 374 return param1_err; 375 set_bit(FF_MOD1_IS_USED, core_effect->flags); 376 } 377 378 if (!old || need_envelope_modifier(iforce, old, effect)) { 379 param2_err = make_envelope_modifier(iforce, mod2_chunk, 380 old !=NULL, 381 effect->u.periodic.envelope.attack_length, 382 effect->u.periodic.envelope.attack_level, 383 effect->u.periodic.envelope.fade_length, 384 effect->u.periodic.envelope.fade_level); 385 if (param2_err) 386 return param2_err; 387 set_bit(FF_MOD2_IS_USED, core_effect->flags); 388 } 389 390 switch (effect->u.periodic.waveform) { 391 case FF_SQUARE: wave_code = 0x20; break; 392 case FF_TRIANGLE: wave_code = 0x21; break; 393 case FF_SINE: wave_code = 0x22; break; 394 case FF_SAW_UP: wave_code = 0x23; break; 395 case FF_SAW_DOWN: wave_code = 0x24; break; 396 default: wave_code = 0x20; break; 397 } 398 399 if (!old || need_core(old, effect)) { 400 core_err = make_core(iforce, effect->id, 401 mod1_chunk->start, 402 mod2_chunk->start, 403 wave_code, 404 0x20, 405 effect->replay.length, 406 effect->replay.delay, 407 effect->trigger.button, 408 effect->trigger.interval, 409 effect->direction); 410 } 411 412 /* If one of the parameter creation failed, we already returned an 413 * error code. 414 * If the core creation failed, we return its error code. 415 * Else: if one parameter at least was created, we return 0 416 * else we return 1; 417 */ 418 return core_err < 0 ? core_err : (param1_err && param2_err); 419} 420 421/* 422 * Upload a constant force effect 423 * Return value: 424 * <0 Error code 425 * 0 Ok, effect created or updated 426 * 1 effect did not change since last upload, and no packet was therefore sent 427 */ 428int iforce_upload_constant(struct iforce *iforce, struct ff_effect *effect, struct ff_effect *old) 429{ 430 int core_id = effect->id; 431 struct iforce_core_effect* core_effect = iforce->core_effects + core_id; 432 struct resource* mod1_chunk = &(iforce->core_effects[core_id].mod1_chunk); 433 struct resource* mod2_chunk = &(iforce->core_effects[core_id].mod2_chunk); 434 int param1_err = 1; 435 int param2_err = 1; 436 int core_err = 0; 437 438 if (!old || need_magnitude_modifier(iforce, old, effect)) { 439 param1_err = make_magnitude_modifier(iforce, mod1_chunk, 440 old != NULL, 441 effect->u.constant.level); 442 if (param1_err) 443 return param1_err; 444 set_bit(FF_MOD1_IS_USED, core_effect->flags); 445 } 446 447 if (!old || need_envelope_modifier(iforce, old, effect)) { 448 param2_err = make_envelope_modifier(iforce, mod2_chunk, 449 old != NULL, 450 effect->u.constant.envelope.attack_length, 451 effect->u.constant.envelope.attack_level, 452 effect->u.constant.envelope.fade_length, 453 effect->u.constant.envelope.fade_level); 454 if (param2_err) 455 return param2_err; 456 set_bit(FF_MOD2_IS_USED, core_effect->flags); 457 } 458 459 if (!old || need_core(old, effect)) { 460 core_err = make_core(iforce, effect->id, 461 mod1_chunk->start, 462 mod2_chunk->start, 463 0x00, 464 0x20, 465 effect->replay.length, 466 effect->replay.delay, 467 effect->trigger.button, 468 effect->trigger.interval, 469 effect->direction); 470 } 471 472 /* If one of the parameter creation failed, we already returned an 473 * error code. 474 * If the core creation failed, we return its error code. 475 * Else: if one parameter at least was created, we return 0 476 * else we return 1; 477 */ 478 return core_err < 0 ? core_err : (param1_err && param2_err); 479} 480 481/* 482 * Upload an condition effect. Those are for example friction, inertia, springs... 483 */ 484int iforce_upload_condition(struct iforce *iforce, struct ff_effect *effect, struct ff_effect *old) 485{ 486 int core_id = effect->id; 487 struct iforce_core_effect* core_effect = iforce->core_effects + core_id; 488 struct resource* mod1_chunk = &(core_effect->mod1_chunk); 489 struct resource* mod2_chunk = &(core_effect->mod2_chunk); 490 u8 type; 491 int param_err = 1; 492 int core_err = 0; 493 494 switch (effect->type) { 495 case FF_SPRING: type = 0x40; break; 496 case FF_DAMPER: type = 0x41; break; 497 default: return -1; 498 } 499 500 if (!old || need_condition_modifier(iforce, old, effect)) { 501 param_err = make_condition_modifier(iforce, mod1_chunk, 502 old != NULL, 503 effect->u.condition[0].right_saturation, 504 effect->u.condition[0].left_saturation, 505 effect->u.condition[0].right_coeff, 506 effect->u.condition[0].left_coeff, 507 effect->u.condition[0].deadband, 508 effect->u.condition[0].center); 509 if (param_err) 510 return param_err; 511 set_bit(FF_MOD1_IS_USED, core_effect->flags); 512 513 param_err = make_condition_modifier(iforce, mod2_chunk, 514 old != NULL, 515 effect->u.condition[1].right_saturation, 516 effect->u.condition[1].left_saturation, 517 effect->u.condition[1].right_coeff, 518 effect->u.condition[1].left_coeff, 519 effect->u.condition[1].deadband, 520 effect->u.condition[1].center); 521 if (param_err) 522 return param_err; 523 set_bit(FF_MOD2_IS_USED, core_effect->flags); 524 525 } 526 527 if (!old || need_core(old, effect)) { 528 core_err = make_core(iforce, effect->id, 529 mod1_chunk->start, mod2_chunk->start, 530 type, 0xc0, 531 effect->replay.length, effect->replay.delay, 532 effect->trigger.button, effect->trigger.interval, 533 effect->direction); 534 } 535 536 /* If the parameter creation failed, we already returned an 537 * error code. 538 * If the core creation failed, we return its error code. 539 * Else: if a parameter was created, we return 0 540 * else we return 1; 541 */ 542 return core_err < 0 ? core_err : param_err; 543} 544