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1 | /* |
2 | * Force feedback driver for USB HID PID compliant devices | |
3 | * | |
4 | * Copyright (c) 2005, 2006 Anssi Hannula <anssi.hannula@gmail.com> | |
5 | */ | |
6 | ||
7 | /* | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | */ | |
22 | ||
23 | /* #define DEBUG */ | |
24 | ||
25 | #define debug(format, arg...) pr_debug("hid-pidff: " format "\n" , ## arg) | |
26 | ||
27 | #include <linux/sched.h> | |
28 | #include <linux/input.h> | |
29 | #include <linux/usb.h> | |
30 | ||
31 | #include "hid.h" | |
32 | ||
33 | #define PID_EFFECTS_MAX 64 | |
34 | ||
35 | /* Report usage table used to put reports into an array */ | |
36 | ||
37 | #define PID_SET_EFFECT 0 | |
38 | #define PID_EFFECT_OPERATION 1 | |
39 | #define PID_DEVICE_GAIN 2 | |
40 | #define PID_POOL 3 | |
41 | #define PID_BLOCK_LOAD 4 | |
42 | #define PID_BLOCK_FREE 5 | |
43 | #define PID_DEVICE_CONTROL 6 | |
44 | #define PID_CREATE_NEW_EFFECT 7 | |
45 | ||
46 | #define PID_REQUIRED_REPORTS 7 | |
47 | ||
48 | #define PID_SET_ENVELOPE 8 | |
49 | #define PID_SET_CONDITION 9 | |
50 | #define PID_SET_PERIODIC 10 | |
51 | #define PID_SET_CONSTANT 11 | |
52 | #define PID_SET_RAMP 12 | |
53 | static const u8 pidff_reports[] = { | |
54 | 0x21, 0x77, 0x7d, 0x7f, 0x89, 0x90, 0x96, 0xab, | |
55 | 0x5a, 0x5f, 0x6e, 0x73, 0x74 | |
56 | }; | |
57 | ||
58 | /* device_control is really 0x95, but 0x96 specified as it is the usage of | |
59 | the only field in that report */ | |
60 | ||
61 | /* Value usage tables used to put fields and values into arrays */ | |
62 | ||
63 | #define PID_EFFECT_BLOCK_INDEX 0 | |
64 | ||
65 | #define PID_DURATION 1 | |
66 | #define PID_GAIN 2 | |
67 | #define PID_TRIGGER_BUTTON 3 | |
68 | #define PID_TRIGGER_REPEAT_INT 4 | |
69 | #define PID_DIRECTION_ENABLE 5 | |
70 | #define PID_START_DELAY 6 | |
71 | static const u8 pidff_set_effect[] = { | |
72 | 0x22, 0x50, 0x52, 0x53, 0x54, 0x56, 0xa7 | |
73 | }; | |
74 | ||
75 | #define PID_ATTACK_LEVEL 1 | |
76 | #define PID_ATTACK_TIME 2 | |
77 | #define PID_FADE_LEVEL 3 | |
78 | #define PID_FADE_TIME 4 | |
79 | static const u8 pidff_set_envelope[] = { 0x22, 0x5b, 0x5c, 0x5d, 0x5e }; | |
80 | ||
81 | #define PID_PARAM_BLOCK_OFFSET 1 | |
82 | #define PID_CP_OFFSET 2 | |
83 | #define PID_POS_COEFFICIENT 3 | |
84 | #define PID_NEG_COEFFICIENT 4 | |
85 | #define PID_POS_SATURATION 5 | |
86 | #define PID_NEG_SATURATION 6 | |
87 | #define PID_DEAD_BAND 7 | |
88 | static const u8 pidff_set_condition[] = { | |
89 | 0x22, 0x23, 0x60, 0x61, 0x62, 0x63, 0x64, 0x65 | |
90 | }; | |
91 | ||
92 | #define PID_MAGNITUDE 1 | |
93 | #define PID_OFFSET 2 | |
94 | #define PID_PHASE 3 | |
95 | #define PID_PERIOD 4 | |
96 | static const u8 pidff_set_periodic[] = { 0x22, 0x70, 0x6f, 0x71, 0x72 }; | |
97 | static const u8 pidff_set_constant[] = { 0x22, 0x70 }; | |
98 | ||
99 | #define PID_RAMP_START 1 | |
100 | #define PID_RAMP_END 2 | |
101 | static const u8 pidff_set_ramp[] = { 0x22, 0x75, 0x76 }; | |
102 | ||
103 | #define PID_RAM_POOL_AVAILABLE 1 | |
104 | static const u8 pidff_block_load[] = { 0x22, 0xac }; | |
105 | ||
106 | #define PID_LOOP_COUNT 1 | |
107 | static const u8 pidff_effect_operation[] = { 0x22, 0x7c }; | |
108 | ||
109 | static const u8 pidff_block_free[] = { 0x22 }; | |
110 | ||
111 | #define PID_DEVICE_GAIN_FIELD 0 | |
112 | static const u8 pidff_device_gain[] = { 0x7e }; | |
113 | ||
114 | #define PID_RAM_POOL_SIZE 0 | |
115 | #define PID_SIMULTANEOUS_MAX 1 | |
116 | #define PID_DEVICE_MANAGED_POOL 2 | |
117 | static const u8 pidff_pool[] = { 0x80, 0x83, 0xa9 }; | |
118 | ||
119 | /* Special field key tables used to put special field keys into arrays */ | |
120 | ||
121 | #define PID_ENABLE_ACTUATORS 0 | |
122 | #define PID_RESET 1 | |
123 | static const u8 pidff_device_control[] = { 0x97, 0x9a }; | |
124 | ||
125 | #define PID_CONSTANT 0 | |
126 | #define PID_RAMP 1 | |
127 | #define PID_SQUARE 2 | |
128 | #define PID_SINE 3 | |
129 | #define PID_TRIANGLE 4 | |
130 | #define PID_SAW_UP 5 | |
131 | #define PID_SAW_DOWN 6 | |
132 | #define PID_SPRING 7 | |
133 | #define PID_DAMPER 8 | |
134 | #define PID_INERTIA 9 | |
135 | #define PID_FRICTION 10 | |
136 | static const u8 pidff_effect_types[] = { | |
137 | 0x26, 0x27, 0x30, 0x31, 0x32, 0x33, 0x34, | |
138 | 0x40, 0x41, 0x42, 0x43 | |
139 | }; | |
140 | ||
141 | #define PID_BLOCK_LOAD_SUCCESS 0 | |
142 | #define PID_BLOCK_LOAD_FULL 1 | |
143 | static const u8 pidff_block_load_status[] = { 0x8c, 0x8d }; | |
144 | ||
145 | #define PID_EFFECT_START 0 | |
146 | #define PID_EFFECT_STOP 1 | |
147 | static const u8 pidff_effect_operation_status[] = { 0x79, 0x7b }; | |
148 | ||
149 | struct pidff_usage { | |
150 | struct hid_field *field; | |
151 | s32 *value; | |
152 | }; | |
153 | ||
154 | struct pidff_device { | |
155 | struct hid_device *hid; | |
156 | ||
157 | struct hid_report *reports[sizeof(pidff_reports)]; | |
158 | ||
159 | struct pidff_usage set_effect[sizeof(pidff_set_effect)]; | |
160 | struct pidff_usage set_envelope[sizeof(pidff_set_envelope)]; | |
161 | struct pidff_usage set_condition[sizeof(pidff_set_condition)]; | |
162 | struct pidff_usage set_periodic[sizeof(pidff_set_periodic)]; | |
163 | struct pidff_usage set_constant[sizeof(pidff_set_constant)]; | |
164 | struct pidff_usage set_ramp[sizeof(pidff_set_ramp)]; | |
165 | ||
166 | struct pidff_usage device_gain[sizeof(pidff_device_gain)]; | |
167 | struct pidff_usage block_load[sizeof(pidff_block_load)]; | |
168 | struct pidff_usage pool[sizeof(pidff_pool)]; | |
169 | struct pidff_usage effect_operation[sizeof(pidff_effect_operation)]; | |
170 | struct pidff_usage block_free[sizeof(pidff_block_free)]; | |
171 | ||
172 | /* Special field is a field that is not composed of | |
173 | usage<->value pairs that pidff_usage values are */ | |
174 | ||
175 | /* Special field in create_new_effect */ | |
176 | struct hid_field *create_new_effect_type; | |
177 | ||
178 | /* Special fields in set_effect */ | |
179 | struct hid_field *set_effect_type; | |
180 | struct hid_field *effect_direction; | |
181 | ||
182 | /* Special field in device_control */ | |
183 | struct hid_field *device_control; | |
184 | ||
185 | /* Special field in block_load */ | |
186 | struct hid_field *block_load_status; | |
187 | ||
188 | /* Special field in effect_operation */ | |
189 | struct hid_field *effect_operation_status; | |
190 | ||
191 | int control_id[sizeof(pidff_device_control)]; | |
192 | int type_id[sizeof(pidff_effect_types)]; | |
193 | int status_id[sizeof(pidff_block_load_status)]; | |
194 | int operation_id[sizeof(pidff_effect_operation_status)]; | |
195 | ||
196 | int pid_id[PID_EFFECTS_MAX]; | |
197 | }; | |
198 | ||
199 | /* | |
200 | * Scale an unsigned value with range 0..max for the given field | |
201 | */ | |
202 | static int pidff_rescale(int i, int max, struct hid_field *field) | |
203 | { | |
204 | return i * (field->logical_maximum - field->logical_minimum) / max + | |
205 | field->logical_minimum; | |
206 | } | |
207 | ||
208 | /* | |
209 | * Scale a signed value in range -0x8000..0x7fff for the given field | |
210 | */ | |
211 | static int pidff_rescale_signed(int i, struct hid_field *field) | |
212 | { | |
213 | return i == 0 ? 0 : i > | |
214 | 0 ? i * field->logical_maximum / 0x7fff : i * | |
215 | field->logical_minimum / -0x8000; | |
216 | } | |
217 | ||
218 | static void pidff_set(struct pidff_usage *usage, u16 value) | |
219 | { | |
220 | usage->value[0] = pidff_rescale(value, 0xffff, usage->field); | |
221 | debug("calculated from %d to %d", value, usage->value[0]); | |
222 | } | |
223 | ||
224 | static void pidff_set_signed(struct pidff_usage *usage, s16 value) | |
225 | { | |
226 | if (usage->field->logical_minimum < 0) | |
227 | usage->value[0] = pidff_rescale_signed(value, usage->field); | |
228 | else { | |
229 | if (value < 0) | |
230 | usage->value[0] = | |
231 | pidff_rescale(-value, 0x8000, usage->field); | |
232 | else | |
233 | usage->value[0] = | |
234 | pidff_rescale(value, 0x7fff, usage->field); | |
235 | } | |
236 | debug("calculated from %d to %d", value, usage->value[0]); | |
237 | } | |
238 | ||
239 | /* | |
240 | * Send envelope report to the device | |
241 | */ | |
242 | static void pidff_set_envelope_report(struct pidff_device *pidff, | |
243 | struct ff_envelope *envelope) | |
244 | { | |
245 | pidff->set_envelope[PID_EFFECT_BLOCK_INDEX].value[0] = | |
246 | pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0]; | |
247 | ||
248 | pidff->set_envelope[PID_ATTACK_LEVEL].value[0] = | |
249 | pidff_rescale(envelope->attack_level > | |
250 | 0x7fff ? 0x7fff : envelope->attack_level, 0x7fff, | |
251 | pidff->set_envelope[PID_ATTACK_LEVEL].field); | |
252 | pidff->set_envelope[PID_FADE_LEVEL].value[0] = | |
253 | pidff_rescale(envelope->fade_level > | |
254 | 0x7fff ? 0x7fff : envelope->fade_level, 0x7fff, | |
255 | pidff->set_envelope[PID_FADE_LEVEL].field); | |
256 | ||
257 | pidff->set_envelope[PID_ATTACK_TIME].value[0] = envelope->attack_length; | |
258 | pidff->set_envelope[PID_FADE_TIME].value[0] = envelope->fade_length; | |
259 | ||
260 | debug("attack %u => %d", envelope->attack_level, | |
261 | pidff->set_envelope[PID_ATTACK_LEVEL].value[0]); | |
262 | ||
263 | hid_submit_report(pidff->hid, pidff->reports[PID_SET_ENVELOPE], | |
264 | USB_DIR_OUT); | |
265 | } | |
266 | ||
267 | /* | |
268 | * Test if the new envelope differs from old one | |
269 | */ | |
270 | static int pidff_needs_set_envelope(struct ff_envelope *envelope, | |
271 | struct ff_envelope *old) | |
272 | { | |
273 | return envelope->attack_level != old->attack_level || | |
274 | envelope->fade_level != old->fade_level || | |
275 | envelope->attack_length != old->attack_length || | |
276 | envelope->fade_length != old->fade_length; | |
277 | } | |
278 | ||
279 | /* | |
280 | * Send constant force report to the device | |
281 | */ | |
282 | static void pidff_set_constant_force_report(struct pidff_device *pidff, | |
283 | struct ff_effect *effect) | |
284 | { | |
285 | pidff->set_constant[PID_EFFECT_BLOCK_INDEX].value[0] = | |
286 | pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0]; | |
287 | pidff_set_signed(&pidff->set_constant[PID_MAGNITUDE], | |
288 | effect->u.constant.level); | |
289 | ||
290 | hid_submit_report(pidff->hid, pidff->reports[PID_SET_CONSTANT], | |
291 | USB_DIR_OUT); | |
292 | } | |
293 | ||
294 | /* | |
295 | * Test if the constant parameters have changed between effects | |
296 | */ | |
297 | static int pidff_needs_set_constant(struct ff_effect *effect, | |
298 | struct ff_effect *old) | |
299 | { | |
300 | return effect->u.constant.level != old->u.constant.level; | |
301 | } | |
302 | ||
303 | /* | |
304 | * Send set effect report to the device | |
305 | */ | |
306 | static void pidff_set_effect_report(struct pidff_device *pidff, | |
307 | struct ff_effect *effect) | |
308 | { | |
309 | pidff->set_effect[PID_EFFECT_BLOCK_INDEX].value[0] = | |
310 | pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0]; | |
311 | pidff->set_effect_type->value[0] = | |
312 | pidff->create_new_effect_type->value[0]; | |
313 | pidff->set_effect[PID_DURATION].value[0] = effect->replay.length; | |
314 | pidff->set_effect[PID_TRIGGER_BUTTON].value[0] = effect->trigger.button; | |
315 | pidff->set_effect[PID_TRIGGER_REPEAT_INT].value[0] = | |
316 | effect->trigger.interval; | |
317 | pidff->set_effect[PID_GAIN].value[0] = | |
318 | pidff->set_effect[PID_GAIN].field->logical_maximum; | |
319 | pidff->set_effect[PID_DIRECTION_ENABLE].value[0] = 1; | |
320 | pidff->effect_direction->value[0] = | |
321 | pidff_rescale(effect->direction, 0xffff, | |
322 | pidff->effect_direction); | |
323 | pidff->set_effect[PID_START_DELAY].value[0] = effect->replay.delay; | |
324 | ||
325 | hid_submit_report(pidff->hid, pidff->reports[PID_SET_EFFECT], | |
326 | USB_DIR_OUT); | |
327 | } | |
328 | ||
329 | /* | |
330 | * Test if the values used in set_effect have changed | |
331 | */ | |
332 | static int pidff_needs_set_effect(struct ff_effect *effect, | |
333 | struct ff_effect *old) | |
334 | { | |
335 | return effect->replay.length != old->replay.length || | |
336 | effect->trigger.interval != old->trigger.interval || | |
337 | effect->trigger.button != old->trigger.button || | |
338 | effect->direction != old->direction || | |
339 | effect->replay.delay != old->replay.delay; | |
340 | } | |
341 | ||
342 | /* | |
343 | * Send periodic effect report to the device | |
344 | */ | |
345 | static void pidff_set_periodic_report(struct pidff_device *pidff, | |
346 | struct ff_effect *effect) | |
347 | { | |
348 | pidff->set_periodic[PID_EFFECT_BLOCK_INDEX].value[0] = | |
349 | pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0]; | |
350 | pidff_set_signed(&pidff->set_periodic[PID_MAGNITUDE], | |
351 | effect->u.periodic.magnitude); | |
352 | pidff_set_signed(&pidff->set_periodic[PID_OFFSET], | |
353 | effect->u.periodic.offset); | |
354 | pidff_set(&pidff->set_periodic[PID_PHASE], effect->u.periodic.phase); | |
355 | pidff->set_periodic[PID_PERIOD].value[0] = effect->u.periodic.period; | |
356 | ||
357 | hid_submit_report(pidff->hid, pidff->reports[PID_SET_PERIODIC], | |
358 | USB_DIR_OUT); | |
359 | ||
360 | } | |
361 | ||
362 | /* | |
363 | * Test if periodic effect parameters have changed | |
364 | */ | |
365 | static int pidff_needs_set_periodic(struct ff_effect *effect, | |
366 | struct ff_effect *old) | |
367 | { | |
368 | return effect->u.periodic.magnitude != old->u.periodic.magnitude || | |
369 | effect->u.periodic.offset != old->u.periodic.offset || | |
370 | effect->u.periodic.phase != old->u.periodic.phase || | |
371 | effect->u.periodic.period != old->u.periodic.period; | |
372 | } | |
373 | ||
374 | /* | |
375 | * Send condition effect reports to the device | |
376 | */ | |
377 | static void pidff_set_condition_report(struct pidff_device *pidff, | |
378 | struct ff_effect *effect) | |
379 | { | |
380 | int i; | |
381 | ||
382 | pidff->set_condition[PID_EFFECT_BLOCK_INDEX].value[0] = | |
383 | pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0]; | |
384 | ||
385 | for (i = 0; i < 2; i++) { | |
386 | pidff->set_condition[PID_PARAM_BLOCK_OFFSET].value[0] = i; | |
387 | pidff_set_signed(&pidff->set_condition[PID_CP_OFFSET], | |
388 | effect->u.condition[i].center); | |
389 | pidff_set_signed(&pidff->set_condition[PID_POS_COEFFICIENT], | |
390 | effect->u.condition[i].right_coeff); | |
391 | pidff_set_signed(&pidff->set_condition[PID_NEG_COEFFICIENT], | |
392 | effect->u.condition[i].left_coeff); | |
393 | pidff_set(&pidff->set_condition[PID_POS_SATURATION], | |
394 | effect->u.condition[i].right_saturation); | |
395 | pidff_set(&pidff->set_condition[PID_NEG_SATURATION], | |
396 | effect->u.condition[i].left_saturation); | |
397 | pidff_set(&pidff->set_condition[PID_DEAD_BAND], | |
398 | effect->u.condition[i].deadband); | |
399 | hid_wait_io(pidff->hid); | |
400 | hid_submit_report(pidff->hid, pidff->reports[PID_SET_CONDITION], | |
401 | USB_DIR_OUT); | |
402 | } | |
403 | } | |
404 | ||
405 | /* | |
406 | * Test if condition effect parameters have changed | |
407 | */ | |
408 | static int pidff_needs_set_condition(struct ff_effect *effect, | |
409 | struct ff_effect *old) | |
410 | { | |
411 | int i; | |
412 | int ret = 0; | |
413 | ||
414 | for (i = 0; i < 2; i++) { | |
415 | struct ff_condition_effect *cond = &effect->u.condition[i]; | |
416 | struct ff_condition_effect *old_cond = &old->u.condition[i]; | |
417 | ||
418 | ret |= cond->center != old_cond->center || | |
419 | cond->right_coeff != old_cond->right_coeff || | |
420 | cond->left_coeff != old_cond->left_coeff || | |
421 | cond->right_saturation != old_cond->right_saturation || | |
422 | cond->left_saturation != old_cond->left_saturation || | |
423 | cond->deadband != old_cond->deadband; | |
424 | } | |
425 | ||
426 | return ret; | |
427 | } | |
428 | ||
429 | /* | |
430 | * Send ramp force report to the device | |
431 | */ | |
432 | static void pidff_set_ramp_force_report(struct pidff_device *pidff, | |
433 | struct ff_effect *effect) | |
434 | { | |
435 | pidff->set_ramp[PID_EFFECT_BLOCK_INDEX].value[0] = | |
436 | pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0]; | |
437 | pidff_set_signed(&pidff->set_ramp[PID_RAMP_START], | |
438 | effect->u.ramp.start_level); | |
439 | pidff_set_signed(&pidff->set_ramp[PID_RAMP_END], | |
440 | effect->u.ramp.end_level); | |
441 | hid_submit_report(pidff->hid, pidff->reports[PID_SET_RAMP], | |
442 | USB_DIR_OUT); | |
443 | } | |
444 | ||
445 | /* | |
446 | * Test if ramp force parameters have changed | |
447 | */ | |
448 | static int pidff_needs_set_ramp(struct ff_effect *effect, struct ff_effect *old) | |
449 | { | |
450 | return effect->u.ramp.start_level != old->u.ramp.start_level || | |
451 | effect->u.ramp.end_level != old->u.ramp.end_level; | |
452 | } | |
453 | ||
454 | /* | |
455 | * Send a request for effect upload to the device | |
456 | * | |
457 | * Returns 0 if device reported success, -ENOSPC if the device reported memory | |
458 | * is full. Upon unknown response the function will retry for 60 times, if | |
459 | * still unsuccessful -EIO is returned. | |
460 | */ | |
461 | static int pidff_request_effect_upload(struct pidff_device *pidff, int efnum) | |
462 | { | |
463 | int j; | |
464 | ||
465 | pidff->create_new_effect_type->value[0] = efnum; | |
466 | hid_submit_report(pidff->hid, pidff->reports[PID_CREATE_NEW_EFFECT], | |
467 | USB_DIR_OUT); | |
468 | debug("create_new_effect sent, type: %d", efnum); | |
469 | ||
470 | pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0] = 0; | |
471 | pidff->block_load_status->value[0] = 0; | |
472 | hid_wait_io(pidff->hid); | |
473 | ||
474 | for (j = 0; j < 60; j++) { | |
475 | debug("pid_block_load requested"); | |
476 | hid_submit_report(pidff->hid, pidff->reports[PID_BLOCK_LOAD], | |
477 | USB_DIR_IN); | |
478 | hid_wait_io(pidff->hid); | |
479 | if (pidff->block_load_status->value[0] == | |
480 | pidff->status_id[PID_BLOCK_LOAD_SUCCESS]) { | |
481 | debug("device reported free memory: %d bytes", | |
482 | pidff->block_load[PID_RAM_POOL_AVAILABLE].value ? | |
483 | pidff->block_load[PID_RAM_POOL_AVAILABLE].value[0] : -1); | |
484 | return 0; | |
485 | } | |
486 | if (pidff->block_load_status->value[0] == | |
487 | pidff->status_id[PID_BLOCK_LOAD_FULL]) { | |
488 | debug("not enough memory free: %d bytes", | |
489 | pidff->block_load[PID_RAM_POOL_AVAILABLE].value ? | |
490 | pidff->block_load[PID_RAM_POOL_AVAILABLE].value[0] : -1); | |
491 | return -ENOSPC; | |
492 | } | |
493 | } | |
494 | printk(KERN_ERR "hid-pidff: pid_block_load failed 60 times\n"); | |
495 | return -EIO; | |
496 | } | |
497 | ||
498 | /* | |
499 | * Play the effect with PID id n times | |
500 | */ | |
501 | static void pidff_playback_pid(struct pidff_device *pidff, int pid_id, int n) | |
502 | { | |
503 | pidff->effect_operation[PID_EFFECT_BLOCK_INDEX].value[0] = pid_id; | |
504 | ||
505 | if (n == 0) { | |
506 | pidff->effect_operation_status->value[0] = | |
507 | pidff->operation_id[PID_EFFECT_STOP]; | |
508 | } else { | |
509 | pidff->effect_operation_status->value[0] = | |
510 | pidff->operation_id[PID_EFFECT_START]; | |
511 | pidff->effect_operation[PID_LOOP_COUNT].value[0] = n; | |
512 | } | |
513 | ||
514 | hid_wait_io(pidff->hid); | |
515 | hid_submit_report(pidff->hid, pidff->reports[PID_EFFECT_OPERATION], | |
516 | USB_DIR_OUT); | |
517 | } | |
518 | ||
519 | /** | |
520 | * Play the effect with effect id @effect_id for @value times | |
521 | */ | |
522 | static int pidff_playback(struct input_dev *dev, int effect_id, int value) | |
523 | { | |
524 | struct pidff_device *pidff = dev->ff->private; | |
525 | ||
526 | pidff_playback_pid(pidff, pidff->pid_id[effect_id], value); | |
527 | ||
528 | return 0; | |
529 | } | |
530 | ||
531 | /* | |
532 | * Erase effect with PID id | |
533 | */ | |
534 | static void pidff_erase_pid(struct pidff_device *pidff, int pid_id) | |
535 | { | |
536 | pidff->block_free[PID_EFFECT_BLOCK_INDEX].value[0] = pid_id; | |
537 | hid_submit_report(pidff->hid, pidff->reports[PID_BLOCK_FREE], | |
538 | USB_DIR_OUT); | |
539 | } | |
540 | ||
541 | /* | |
542 | * Stop and erase effect with effect_id | |
543 | */ | |
544 | static int pidff_erase_effect(struct input_dev *dev, int effect_id) | |
545 | { | |
546 | struct pidff_device *pidff = dev->ff->private; | |
547 | int pid_id = pidff->pid_id[effect_id]; | |
548 | ||
549 | debug("starting to erase %d/%d", effect_id, pidff->pid_id[effect_id]); | |
550 | pidff_playback_pid(pidff, pid_id, 0); | |
551 | pidff_erase_pid(pidff, pid_id); | |
552 | ||
553 | return 0; | |
554 | } | |
555 | ||
556 | /* | |
557 | * Effect upload handler | |
558 | */ | |
559 | static int pidff_upload_effect(struct input_dev *dev, struct ff_effect *effect, | |
560 | struct ff_effect *old) | |
561 | { | |
562 | struct pidff_device *pidff = dev->ff->private; | |
563 | int type_id; | |
564 | int error; | |
565 | ||
566 | switch (effect->type) { | |
567 | case FF_CONSTANT: | |
568 | if (!old) { | |
569 | error = pidff_request_effect_upload(pidff, | |
570 | pidff->type_id[PID_CONSTANT]); | |
571 | if (error) | |
572 | return error; | |
573 | } | |
574 | if (!old || pidff_needs_set_effect(effect, old)) | |
575 | pidff_set_effect_report(pidff, effect); | |
576 | if (!old || pidff_needs_set_constant(effect, old)) | |
577 | pidff_set_constant_force_report(pidff, effect); | |
578 | if (!old || | |
579 | pidff_needs_set_envelope(&effect->u.constant.envelope, | |
580 | &old->u.constant.envelope)) | |
581 | pidff_set_envelope_report(pidff, | |
582 | &effect->u.constant.envelope); | |
583 | break; | |
584 | ||
585 | case FF_PERIODIC: | |
586 | if (!old) { | |
587 | switch (effect->u.periodic.waveform) { | |
588 | case FF_SQUARE: | |
589 | type_id = PID_SQUARE; | |
590 | break; | |
591 | case FF_TRIANGLE: | |
592 | type_id = PID_TRIANGLE; | |
593 | break; | |
594 | case FF_SINE: | |
595 | type_id = PID_SINE; | |
596 | break; | |
597 | case FF_SAW_UP: | |
598 | type_id = PID_SAW_UP; | |
599 | break; | |
600 | case FF_SAW_DOWN: | |
601 | type_id = PID_SAW_DOWN; | |
602 | break; | |
603 | default: | |
604 | printk(KERN_ERR | |
605 | "hid-pidff: invalid waveform\n"); | |
606 | return -EINVAL; | |
607 | } | |
608 | ||
609 | error = pidff_request_effect_upload(pidff, | |
610 | pidff->type_id[type_id]); | |
611 | if (error) | |
612 | return error; | |
613 | } | |
614 | if (!old || pidff_needs_set_effect(effect, old)) | |
615 | pidff_set_effect_report(pidff, effect); | |
616 | if (!old || pidff_needs_set_periodic(effect, old)) | |
617 | pidff_set_periodic_report(pidff, effect); | |
618 | if (!old || | |
619 | pidff_needs_set_envelope(&effect->u.periodic.envelope, | |
620 | &old->u.periodic.envelope)) | |
621 | pidff_set_envelope_report(pidff, | |
622 | &effect->u.periodic.envelope); | |
623 | break; | |
624 | ||
625 | case FF_RAMP: | |
626 | if (!old) { | |
627 | error = pidff_request_effect_upload(pidff, | |
628 | pidff->type_id[PID_RAMP]); | |
629 | if (error) | |
630 | return error; | |
631 | } | |
632 | if (!old || pidff_needs_set_effect(effect, old)) | |
633 | pidff_set_effect_report(pidff, effect); | |
634 | if (!old || pidff_needs_set_ramp(effect, old)) | |
635 | pidff_set_ramp_force_report(pidff, effect); | |
636 | if (!old || | |
637 | pidff_needs_set_envelope(&effect->u.ramp.envelope, | |
638 | &old->u.ramp.envelope)) | |
639 | pidff_set_envelope_report(pidff, | |
640 | &effect->u.ramp.envelope); | |
641 | break; | |
642 | ||
643 | case FF_SPRING: | |
644 | if (!old) { | |
645 | error = pidff_request_effect_upload(pidff, | |
646 | pidff->type_id[PID_SPRING]); | |
647 | if (error) | |
648 | return error; | |
649 | } | |
650 | if (!old || pidff_needs_set_effect(effect, old)) | |
651 | pidff_set_effect_report(pidff, effect); | |
652 | if (!old || pidff_needs_set_condition(effect, old)) | |
653 | pidff_set_condition_report(pidff, effect); | |
654 | break; | |
655 | ||
656 | case FF_FRICTION: | |
657 | if (!old) { | |
658 | error = pidff_request_effect_upload(pidff, | |
659 | pidff->type_id[PID_FRICTION]); | |
660 | if (error) | |
661 | return error; | |
662 | } | |
663 | if (!old || pidff_needs_set_effect(effect, old)) | |
664 | pidff_set_effect_report(pidff, effect); | |
665 | if (!old || pidff_needs_set_condition(effect, old)) | |
666 | pidff_set_condition_report(pidff, effect); | |
667 | break; | |
668 | ||
669 | case FF_DAMPER: | |
670 | if (!old) { | |
671 | error = pidff_request_effect_upload(pidff, | |
672 | pidff->type_id[PID_DAMPER]); | |
673 | if (error) | |
674 | return error; | |
675 | } | |
676 | if (!old || pidff_needs_set_effect(effect, old)) | |
677 | pidff_set_effect_report(pidff, effect); | |
678 | if (!old || pidff_needs_set_condition(effect, old)) | |
679 | pidff_set_condition_report(pidff, effect); | |
680 | break; | |
681 | ||
682 | case FF_INERTIA: | |
683 | if (!old) { | |
684 | error = pidff_request_effect_upload(pidff, | |
685 | pidff->type_id[PID_INERTIA]); | |
686 | if (error) | |
687 | return error; | |
688 | } | |
689 | if (!old || pidff_needs_set_effect(effect, old)) | |
690 | pidff_set_effect_report(pidff, effect); | |
691 | if (!old || pidff_needs_set_condition(effect, old)) | |
692 | pidff_set_condition_report(pidff, effect); | |
693 | break; | |
694 | ||
695 | default: | |
696 | printk(KERN_ERR "hid-pidff: invalid type\n"); | |
697 | return -EINVAL; | |
698 | } | |
699 | ||
700 | if (!old) | |
701 | pidff->pid_id[effect->id] = | |
702 | pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0]; | |
703 | ||
704 | debug("uploaded"); | |
705 | ||
706 | return 0; | |
707 | } | |
708 | ||
709 | /* | |
710 | * set_gain() handler | |
711 | */ | |
712 | static void pidff_set_gain(struct input_dev *dev, u16 gain) | |
713 | { | |
714 | struct pidff_device *pidff = dev->ff->private; | |
715 | ||
716 | pidff_set(&pidff->device_gain[PID_DEVICE_GAIN_FIELD], gain); | |
717 | hid_submit_report(pidff->hid, pidff->reports[PID_DEVICE_GAIN], | |
718 | USB_DIR_OUT); | |
719 | } | |
720 | ||
721 | static void pidff_autocenter(struct pidff_device *pidff, u16 magnitude) | |
722 | { | |
723 | struct hid_field *field = | |
724 | pidff->block_load[PID_EFFECT_BLOCK_INDEX].field; | |
725 | ||
726 | if (!magnitude) { | |
727 | pidff_playback_pid(pidff, field->logical_minimum, 0); | |
728 | return; | |
729 | } | |
730 | ||
731 | pidff_playback_pid(pidff, field->logical_minimum, 1); | |
732 | ||
733 | pidff->set_effect[PID_EFFECT_BLOCK_INDEX].value[0] = | |
734 | pidff->block_load[PID_EFFECT_BLOCK_INDEX].field->logical_minimum; | |
735 | pidff->set_effect_type->value[0] = pidff->type_id[PID_SPRING]; | |
736 | pidff->set_effect[PID_DURATION].value[0] = 0; | |
737 | pidff->set_effect[PID_TRIGGER_BUTTON].value[0] = 0; | |
738 | pidff->set_effect[PID_TRIGGER_REPEAT_INT].value[0] = 0; | |
739 | pidff_set(&pidff->set_effect[PID_GAIN], magnitude); | |
740 | pidff->set_effect[PID_START_DELAY].value[0] = 0; | |
741 | ||
742 | hid_submit_report(pidff->hid, pidff->reports[PID_SET_EFFECT], | |
743 | USB_DIR_OUT); | |
744 | } | |
745 | ||
746 | /* | |
747 | * pidff_set_autocenter() handler | |
748 | */ | |
749 | static void pidff_set_autocenter(struct input_dev *dev, u16 magnitude) | |
750 | { | |
751 | struct pidff_device *pidff = dev->ff->private; | |
752 | ||
753 | pidff_autocenter(pidff, magnitude); | |
754 | } | |
755 | ||
756 | /* | |
757 | * Find fields from a report and fill a pidff_usage | |
758 | */ | |
759 | static int pidff_find_fields(struct pidff_usage *usage, const u8 *table, | |
760 | struct hid_report *report, int count, int strict) | |
761 | { | |
762 | int i, j, k, found; | |
763 | ||
764 | for (k = 0; k < count; k++) { | |
765 | found = 0; | |
766 | for (i = 0; i < report->maxfield; i++) { | |
767 | if (report->field[i]->maxusage != | |
768 | report->field[i]->report_count) { | |
769 | debug("maxusage and report_count do not match, " | |
770 | "skipping"); | |
771 | continue; | |
772 | } | |
773 | for (j = 0; j < report->field[i]->maxusage; j++) { | |
774 | if (report->field[i]->usage[j].hid == | |
775 | (HID_UP_PID | table[k])) { | |
776 | debug("found %d at %d->%d", k, i, j); | |
777 | usage[k].field = report->field[i]; | |
778 | usage[k].value = | |
779 | &report->field[i]->value[j]; | |
780 | found = 1; | |
781 | break; | |
782 | } | |
783 | } | |
784 | if (found) | |
785 | break; | |
786 | } | |
787 | if (!found && strict) { | |
788 | debug("failed to locate %d", k); | |
789 | return -1; | |
790 | } | |
791 | } | |
792 | return 0; | |
793 | } | |
794 | ||
795 | /* | |
796 | * Return index into pidff_reports for the given usage | |
797 | */ | |
798 | static int pidff_check_usage(int usage) | |
799 | { | |
800 | int i; | |
801 | ||
802 | for (i = 0; i < sizeof(pidff_reports); i++) | |
803 | if (usage == (HID_UP_PID | pidff_reports[i])) | |
804 | return i; | |
805 | ||
806 | return -1; | |
807 | } | |
808 | ||
809 | /* | |
810 | * Find the reports and fill pidff->reports[] | |
811 | * report_type specifies either OUTPUT or FEATURE reports | |
812 | */ | |
813 | static void pidff_find_reports(struct hid_device *hid, int report_type, | |
814 | struct pidff_device *pidff) | |
815 | { | |
816 | struct hid_report *report; | |
817 | int i, ret; | |
818 | ||
819 | list_for_each_entry(report, | |
820 | &hid->report_enum[report_type].report_list, list) { | |
821 | if (report->maxfield < 1) | |
822 | continue; | |
823 | ret = pidff_check_usage(report->field[0]->logical); | |
824 | if (ret != -1) { | |
825 | debug("found usage 0x%02x from field->logical", | |
826 | pidff_reports[ret]); | |
827 | pidff->reports[ret] = report; | |
828 | continue; | |
829 | } | |
830 | ||
831 | /* | |
832 | * Sometimes logical collections are stacked to indicate | |
833 | * different usages for the report and the field, in which | |
834 | * case we want the usage of the parent. However, Linux HID | |
835 | * implementation hides this fact, so we have to dig it up | |
836 | * ourselves | |
837 | */ | |
838 | i = report->field[0]->usage[0].collection_index; | |
839 | if (i <= 0 || | |
840 | hid->collection[i - 1].type != HID_COLLECTION_LOGICAL) | |
841 | continue; | |
842 | ret = pidff_check_usage(hid->collection[i - 1].usage); | |
843 | if (ret != -1 && !pidff->reports[ret]) { | |
844 | debug("found usage 0x%02x from collection array", | |
845 | pidff_reports[ret]); | |
846 | pidff->reports[ret] = report; | |
847 | } | |
848 | } | |
849 | } | |
850 | ||
851 | /* | |
852 | * Test if the required reports have been found | |
853 | */ | |
854 | static int pidff_reports_ok(struct pidff_device *pidff) | |
855 | { | |
856 | int i; | |
857 | ||
858 | for (i = 0; i <= PID_REQUIRED_REPORTS; i++) { | |
859 | if (!pidff->reports[i]) { | |
860 | debug("%d missing", i); | |
861 | return 0; | |
862 | } | |
863 | } | |
864 | ||
865 | return 1; | |
866 | } | |
867 | ||
868 | /* | |
869 | * Find a field with a specific usage within a report | |
870 | */ | |
871 | static struct hid_field *pidff_find_special_field(struct hid_report *report, | |
872 | int usage, int enforce_min) | |
873 | { | |
874 | int i; | |
875 | ||
876 | for (i = 0; i < report->maxfield; i++) { | |
877 | if (report->field[i]->logical == (HID_UP_PID | usage) && | |
878 | report->field[i]->report_count > 0) { | |
879 | if (!enforce_min || | |
880 | report->field[i]->logical_minimum == 1) | |
881 | return report->field[i]; | |
882 | else { | |
883 | printk(KERN_ERR "hid-pidff: logical_minimum " | |
884 | "is not 1 as it should be\n"); | |
885 | return NULL; | |
886 | } | |
887 | } | |
888 | } | |
889 | return NULL; | |
890 | } | |
891 | ||
892 | /* | |
893 | * Fill a pidff->*_id struct table | |
894 | */ | |
895 | static int pidff_find_special_keys(int *keys, struct hid_field *fld, | |
896 | const u8 *usagetable, int count) | |
897 | { | |
898 | ||
899 | int i, j; | |
900 | int found = 0; | |
901 | ||
902 | for (i = 0; i < count; i++) { | |
903 | for (j = 0; j < fld->maxusage; j++) { | |
904 | if (fld->usage[j].hid == (HID_UP_PID | usagetable[i])) { | |
905 | keys[i] = j + 1; | |
906 | found++; | |
907 | break; | |
908 | } | |
909 | } | |
910 | } | |
911 | return found; | |
912 | } | |
913 | ||
914 | #define PIDFF_FIND_SPECIAL_KEYS(keys, field, name) \ | |
915 | pidff_find_special_keys(pidff->keys, pidff->field, pidff_ ## name, \ | |
916 | sizeof(pidff_ ## name)) | |
917 | ||
918 | /* | |
919 | * Find and check the special fields | |
920 | */ | |
921 | static int pidff_find_special_fields(struct pidff_device *pidff) | |
922 | { | |
923 | debug("finding special fields"); | |
924 | ||
925 | pidff->create_new_effect_type = | |
926 | pidff_find_special_field(pidff->reports[PID_CREATE_NEW_EFFECT], | |
927 | 0x25, 1); | |
928 | pidff->set_effect_type = | |
929 | pidff_find_special_field(pidff->reports[PID_SET_EFFECT], | |
930 | 0x25, 1); | |
931 | pidff->effect_direction = | |
932 | pidff_find_special_field(pidff->reports[PID_SET_EFFECT], | |
933 | 0x57, 0); | |
934 | pidff->device_control = | |
935 | pidff_find_special_field(pidff->reports[PID_DEVICE_CONTROL], | |
936 | 0x96, 1); | |
937 | pidff->block_load_status = | |
938 | pidff_find_special_field(pidff->reports[PID_BLOCK_LOAD], | |
939 | 0x8b, 1); | |
940 | pidff->effect_operation_status = | |
941 | pidff_find_special_field(pidff->reports[PID_EFFECT_OPERATION], | |
942 | 0x78, 1); | |
943 | ||
944 | debug("search done"); | |
945 | ||
946 | if (!pidff->create_new_effect_type || !pidff->set_effect_type) { | |
947 | printk(KERN_ERR "hid-pidff: effect lists not found\n"); | |
948 | return -1; | |
949 | } | |
950 | ||
951 | if (!pidff->effect_direction) { | |
952 | printk(KERN_ERR "hid-pidff: direction field not found\n"); | |
953 | return -1; | |
954 | } | |
955 | ||
956 | if (!pidff->device_control) { | |
957 | printk(KERN_ERR "hid-pidff: device control field not found\n"); | |
958 | return -1; | |
959 | } | |
960 | ||
961 | if (!pidff->block_load_status) { | |
962 | printk(KERN_ERR | |
963 | "hid-pidff: block load status field not found\n"); | |
964 | return -1; | |
965 | } | |
966 | ||
967 | if (!pidff->effect_operation_status) { | |
968 | printk(KERN_ERR | |
969 | "hid-pidff: effect operation field not found\n"); | |
970 | return -1; | |
971 | } | |
972 | ||
973 | pidff_find_special_keys(pidff->control_id, pidff->device_control, | |
974 | pidff_device_control, | |
975 | sizeof(pidff_device_control)); | |
976 | ||
977 | PIDFF_FIND_SPECIAL_KEYS(control_id, device_control, device_control); | |
978 | ||
979 | if (!PIDFF_FIND_SPECIAL_KEYS(type_id, create_new_effect_type, | |
980 | effect_types)) { | |
981 | printk(KERN_ERR "hid-pidff: no effect types found\n"); | |
982 | return -1; | |
983 | } | |
984 | ||
985 | if (PIDFF_FIND_SPECIAL_KEYS(status_id, block_load_status, | |
986 | block_load_status) != | |
987 | sizeof(pidff_block_load_status)) { | |
988 | printk(KERN_ERR | |
989 | "hidpidff: block load status identifiers not found\n"); | |
990 | return -1; | |
991 | } | |
992 | ||
993 | if (PIDFF_FIND_SPECIAL_KEYS(operation_id, effect_operation_status, | |
994 | effect_operation_status) != | |
995 | sizeof(pidff_effect_operation_status)) { | |
996 | printk(KERN_ERR | |
997 | "hidpidff: effect operation identifiers not found\n"); | |
998 | return -1; | |
999 | } | |
1000 | ||
1001 | return 0; | |
1002 | } | |
1003 | ||
1004 | /** | |
1005 | * Find the implemented effect types | |
1006 | */ | |
1007 | static int pidff_find_effects(struct pidff_device *pidff, | |
1008 | struct input_dev *dev) | |
1009 | { | |
1010 | int i; | |
1011 | ||
1012 | for (i = 0; i < sizeof(pidff_effect_types); i++) { | |
1013 | int pidff_type = pidff->type_id[i]; | |
1014 | if (pidff->set_effect_type->usage[pidff_type].hid != | |
1015 | pidff->create_new_effect_type->usage[pidff_type].hid) { | |
1016 | printk(KERN_ERR "hid-pidff: " | |
1017 | "effect type number %d is invalid\n", i); | |
1018 | return -1; | |
1019 | } | |
1020 | } | |
1021 | ||
1022 | if (pidff->type_id[PID_CONSTANT]) | |
1023 | set_bit(FF_CONSTANT, dev->ffbit); | |
1024 | if (pidff->type_id[PID_RAMP]) | |
1025 | set_bit(FF_RAMP, dev->ffbit); | |
1026 | if (pidff->type_id[PID_SQUARE]) { | |
1027 | set_bit(FF_SQUARE, dev->ffbit); | |
1028 | set_bit(FF_PERIODIC, dev->ffbit); | |
1029 | } | |
1030 | if (pidff->type_id[PID_SINE]) { | |
1031 | set_bit(FF_SINE, dev->ffbit); | |
1032 | set_bit(FF_PERIODIC, dev->ffbit); | |
1033 | } | |
1034 | if (pidff->type_id[PID_TRIANGLE]) { | |
1035 | set_bit(FF_TRIANGLE, dev->ffbit); | |
1036 | set_bit(FF_PERIODIC, dev->ffbit); | |
1037 | } | |
1038 | if (pidff->type_id[PID_SAW_UP]) { | |
1039 | set_bit(FF_SAW_UP, dev->ffbit); | |
1040 | set_bit(FF_PERIODIC, dev->ffbit); | |
1041 | } | |
1042 | if (pidff->type_id[PID_SAW_DOWN]) { | |
1043 | set_bit(FF_SAW_DOWN, dev->ffbit); | |
1044 | set_bit(FF_PERIODIC, dev->ffbit); | |
1045 | } | |
1046 | if (pidff->type_id[PID_SPRING]) | |
1047 | set_bit(FF_SPRING, dev->ffbit); | |
1048 | if (pidff->type_id[PID_DAMPER]) | |
1049 | set_bit(FF_DAMPER, dev->ffbit); | |
1050 | if (pidff->type_id[PID_INERTIA]) | |
1051 | set_bit(FF_INERTIA, dev->ffbit); | |
1052 | if (pidff->type_id[PID_FRICTION]) | |
1053 | set_bit(FF_FRICTION, dev->ffbit); | |
1054 | ||
1055 | return 0; | |
1056 | ||
1057 | } | |
1058 | ||
1059 | #define PIDFF_FIND_FIELDS(name, report, strict) \ | |
1060 | pidff_find_fields(pidff->name, pidff_ ## name, \ | |
1061 | pidff->reports[report], \ | |
1062 | sizeof(pidff_ ## name), strict) | |
1063 | ||
1064 | /* | |
1065 | * Fill and check the pidff_usages | |
1066 | */ | |
1067 | static int pidff_init_fields(struct pidff_device *pidff, struct input_dev *dev) | |
1068 | { | |
1069 | int envelope_ok = 0; | |
1070 | ||
1071 | if (PIDFF_FIND_FIELDS(set_effect, PID_SET_EFFECT, 1)) { | |
1072 | printk(KERN_ERR | |
1073 | "hid-pidff: unknown set_effect report layout\n"); | |
1074 | return -ENODEV; | |
1075 | } | |
1076 | ||
1077 | PIDFF_FIND_FIELDS(block_load, PID_BLOCK_LOAD, 0); | |
1078 | if (!pidff->block_load[PID_EFFECT_BLOCK_INDEX].value) { | |
1079 | printk(KERN_ERR | |
1080 | "hid-pidff: unknown pid_block_load report layout\n"); | |
1081 | return -ENODEV; | |
1082 | } | |
1083 | ||
1084 | if (PIDFF_FIND_FIELDS(effect_operation, PID_EFFECT_OPERATION, 1)) { | |
1085 | printk(KERN_ERR | |
1086 | "hid-pidff: unknown effect_operation report layout\n"); | |
1087 | return -ENODEV; | |
1088 | } | |
1089 | ||
1090 | if (PIDFF_FIND_FIELDS(block_free, PID_BLOCK_FREE, 1)) { | |
1091 | printk(KERN_ERR | |
1092 | "hid-pidff: unknown pid_block_free report layout\n"); | |
1093 | return -ENODEV; | |
1094 | } | |
1095 | ||
1096 | if (!PIDFF_FIND_FIELDS(set_envelope, PID_SET_ENVELOPE, 1)) | |
1097 | envelope_ok = 1; | |
1098 | ||
1099 | if (pidff_find_special_fields(pidff) || pidff_find_effects(pidff, dev)) | |
1100 | return -ENODEV; | |
1101 | ||
1102 | if (!envelope_ok) { | |
1103 | if (test_and_clear_bit(FF_CONSTANT, dev->ffbit)) | |
1104 | printk(KERN_WARNING "hid-pidff: " | |
1105 | "has constant effect but no envelope\n"); | |
1106 | if (test_and_clear_bit(FF_RAMP, dev->ffbit)) | |
1107 | printk(KERN_WARNING "hid-pidff: " | |
1108 | "has ramp effect but no envelope\n"); | |
1109 | ||
1110 | if (test_and_clear_bit(FF_PERIODIC, dev->ffbit)) | |
1111 | printk(KERN_WARNING "hid-pidff: " | |
1112 | "has periodic effect but no envelope\n"); | |
1113 | } | |
1114 | ||
1115 | if (test_bit(FF_CONSTANT, dev->ffbit) && | |
1116 | PIDFF_FIND_FIELDS(set_constant, PID_SET_CONSTANT, 1)) { | |
1117 | printk(KERN_WARNING | |
1118 | "hid-pidff: unknown constant effect layout\n"); | |
1119 | clear_bit(FF_CONSTANT, dev->ffbit); | |
1120 | } | |
1121 | ||
1122 | if (test_bit(FF_RAMP, dev->ffbit) && | |
1123 | PIDFF_FIND_FIELDS(set_ramp, PID_SET_RAMP, 1)) { | |
1124 | printk(KERN_WARNING "hid-pidff: unknown ramp effect layout\n"); | |
1125 | clear_bit(FF_RAMP, dev->ffbit); | |
1126 | } | |
1127 | ||
1128 | if ((test_bit(FF_SPRING, dev->ffbit) || | |
1129 | test_bit(FF_DAMPER, dev->ffbit) || | |
1130 | test_bit(FF_FRICTION, dev->ffbit) || | |
1131 | test_bit(FF_INERTIA, dev->ffbit)) && | |
1132 | PIDFF_FIND_FIELDS(set_condition, PID_SET_CONDITION, 1)) { | |
1133 | printk(KERN_WARNING | |
1134 | "hid-pidff: unknown condition effect layout\n"); | |
1135 | clear_bit(FF_SPRING, dev->ffbit); | |
1136 | clear_bit(FF_DAMPER, dev->ffbit); | |
1137 | clear_bit(FF_FRICTION, dev->ffbit); | |
1138 | clear_bit(FF_INERTIA, dev->ffbit); | |
1139 | } | |
1140 | ||
1141 | if (test_bit(FF_PERIODIC, dev->ffbit) && | |
1142 | PIDFF_FIND_FIELDS(set_periodic, PID_SET_PERIODIC, 1)) { | |
1143 | printk(KERN_WARNING | |
1144 | "hid-pidff: unknown periodic effect layout\n"); | |
1145 | clear_bit(FF_PERIODIC, dev->ffbit); | |
1146 | } | |
1147 | ||
1148 | PIDFF_FIND_FIELDS(pool, PID_POOL, 0); | |
1149 | ||
1150 | if (!PIDFF_FIND_FIELDS(device_gain, PID_DEVICE_GAIN, 1)) | |
1151 | set_bit(FF_GAIN, dev->ffbit); | |
1152 | ||
1153 | return 0; | |
1154 | } | |
1155 | ||
1156 | /* | |
1157 | * Reset the device | |
1158 | */ | |
1159 | static void pidff_reset(struct pidff_device *pidff) | |
1160 | { | |
1161 | struct hid_device *hid = pidff->hid; | |
1162 | int i = 0; | |
1163 | ||
1164 | pidff->device_control->value[0] = pidff->control_id[PID_RESET]; | |
1165 | /* We reset twice as sometimes hid_wait_io isn't waiting long enough */ | |
1166 | hid_submit_report(hid, pidff->reports[PID_DEVICE_CONTROL], USB_DIR_OUT); | |
1167 | hid_wait_io(hid); | |
1168 | hid_submit_report(hid, pidff->reports[PID_DEVICE_CONTROL], USB_DIR_OUT); | |
1169 | hid_wait_io(hid); | |
1170 | ||
1171 | pidff->device_control->value[0] = | |
1172 | pidff->control_id[PID_ENABLE_ACTUATORS]; | |
1173 | hid_submit_report(hid, pidff->reports[PID_DEVICE_CONTROL], USB_DIR_OUT); | |
1174 | hid_wait_io(hid); | |
1175 | ||
1176 | /* pool report is sometimes messed up, refetch it */ | |
1177 | hid_submit_report(hid, pidff->reports[PID_POOL], USB_DIR_IN); | |
1178 | hid_wait_io(hid); | |
1179 | ||
1180 | if (pidff->pool[PID_SIMULTANEOUS_MAX].value) { | |
1181 | int sim_effects = pidff->pool[PID_SIMULTANEOUS_MAX].value[0]; | |
1182 | while (sim_effects < 2) { | |
1183 | if (i++ > 20) { | |
1184 | printk(KERN_WARNING "hid-pidff: device reports " | |
1185 | "%d simultaneous effects\n", | |
1186 | sim_effects); | |
1187 | break; | |
1188 | } | |
1189 | debug("pid_pool requested again"); | |
1190 | hid_submit_report(hid, pidff->reports[PID_POOL], | |
1191 | USB_DIR_IN); | |
1192 | hid_wait_io(hid); | |
1193 | } | |
1194 | } | |
1195 | } | |
1196 | ||
1197 | /* | |
1198 | * Test if autocenter modification is using the supported method | |
1199 | */ | |
1200 | static int pidff_check_autocenter(struct pidff_device *pidff, | |
1201 | struct input_dev *dev) | |
1202 | { | |
1203 | int error; | |
1204 | ||
1205 | /* | |
1206 | * Let's find out if autocenter modification is supported | |
1207 | * Specification doesn't specify anything, so we request an | |
1208 | * effect upload and cancel it immediately. If the approved | |
1209 | * effect id was one above the minimum, then we assume the first | |
1210 | * effect id is a built-in spring type effect used for autocenter | |
1211 | */ | |
1212 | ||
1213 | error = pidff_request_effect_upload(pidff, 1); | |
1214 | if (error) { | |
1215 | printk(KERN_ERR "hid-pidff: upload request failed\n"); | |
1216 | return error; | |
1217 | } | |
1218 | ||
1219 | if (pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0] == | |
1220 | pidff->block_load[PID_EFFECT_BLOCK_INDEX].field->logical_minimum + 1) { | |
1221 | pidff_autocenter(pidff, 0xffff); | |
1222 | set_bit(FF_AUTOCENTER, dev->ffbit); | |
1223 | } else { | |
1224 | printk(KERN_NOTICE "hid-pidff: " | |
1225 | "device has unknown autocenter control method\n"); | |
1226 | } | |
1227 | ||
1228 | pidff_erase_pid(pidff, | |
1229 | pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0]); | |
1230 | ||
1231 | return 0; | |
1232 | ||
1233 | } | |
1234 | ||
1235 | /* | |
1236 | * Check if the device is PID and initialize it | |
1237 | */ | |
1238 | int hid_pidff_init(struct hid_device *hid) | |
1239 | { | |
1240 | struct pidff_device *pidff; | |
1241 | struct hid_input *hidinput = list_entry(hid->inputs.next, | |
1242 | struct hid_input, list); | |
1243 | struct input_dev *dev = hidinput->input; | |
1244 | struct ff_device *ff; | |
1245 | int max_effects; | |
1246 | int error; | |
1247 | ||
1248 | debug("starting pid init"); | |
1249 | ||
1250 | if (list_empty(&hid->report_enum[HID_OUTPUT_REPORT].report_list)) { | |
1251 | debug("not a PID device, no output report"); | |
1252 | return -ENODEV; | |
1253 | } | |
1254 | ||
1255 | pidff = kzalloc(sizeof(*pidff), GFP_KERNEL); | |
1256 | if (!pidff) | |
1257 | return -ENOMEM; | |
1258 | ||
1259 | pidff->hid = hid; | |
1260 | ||
1261 | pidff_find_reports(hid, HID_OUTPUT_REPORT, pidff); | |
1262 | pidff_find_reports(hid, HID_FEATURE_REPORT, pidff); | |
1263 | ||
1264 | if (!pidff_reports_ok(pidff)) { | |
1265 | debug("reports not ok, aborting"); | |
1266 | error = -ENODEV; | |
1267 | goto fail; | |
1268 | } | |
1269 | ||
1270 | error = pidff_init_fields(pidff, dev); | |
1271 | if (error) | |
1272 | goto fail; | |
1273 | ||
1274 | pidff_reset(pidff); | |
1275 | ||
1276 | if (test_bit(FF_GAIN, dev->ffbit)) { | |
1277 | pidff_set(&pidff->device_gain[PID_DEVICE_GAIN_FIELD], 0xffff); | |
1278 | hid_submit_report(pidff->hid, pidff->reports[PID_DEVICE_GAIN], | |
1279 | USB_DIR_OUT); | |
1280 | } | |
1281 | ||
1282 | error = pidff_check_autocenter(pidff, dev); | |
1283 | if (error) | |
1284 | goto fail; | |
1285 | ||
1286 | max_effects = | |
1287 | pidff->block_load[PID_EFFECT_BLOCK_INDEX].field->logical_maximum - | |
1288 | pidff->block_load[PID_EFFECT_BLOCK_INDEX].field->logical_minimum + | |
1289 | 1; | |
1290 | debug("max effects is %d", max_effects); | |
1291 | ||
1292 | if (max_effects > PID_EFFECTS_MAX) | |
1293 | max_effects = PID_EFFECTS_MAX; | |
1294 | ||
1295 | if (pidff->pool[PID_SIMULTANEOUS_MAX].value) | |
1296 | debug("max simultaneous effects is %d", | |
1297 | pidff->pool[PID_SIMULTANEOUS_MAX].value[0]); | |
1298 | ||
1299 | if (pidff->pool[PID_RAM_POOL_SIZE].value) | |
1300 | debug("device memory size is %d bytes", | |
1301 | pidff->pool[PID_RAM_POOL_SIZE].value[0]); | |
1302 | ||
1303 | if (pidff->pool[PID_DEVICE_MANAGED_POOL].value && | |
1304 | pidff->pool[PID_DEVICE_MANAGED_POOL].value[0] == 0) { | |
1305 | printk(KERN_NOTICE "hid-pidff: " | |
1306 | "device does not support device managed pool\n"); | |
1307 | goto fail; | |
1308 | } | |
1309 | ||
1310 | error = input_ff_create(dev, max_effects); | |
1311 | if (error) | |
1312 | goto fail; | |
1313 | ||
1314 | ff = dev->ff; | |
1315 | ff->private = pidff; | |
1316 | ff->upload = pidff_upload_effect; | |
1317 | ff->erase = pidff_erase_effect; | |
1318 | ff->set_gain = pidff_set_gain; | |
1319 | ff->set_autocenter = pidff_set_autocenter; | |
1320 | ff->playback = pidff_playback; | |
1321 | ||
1322 | printk(KERN_INFO "Force feedback for USB HID PID devices by " | |
1323 | "Anssi Hannula <anssi.hannula@gmail.com>\n"); | |
1324 | ||
1325 | return 0; | |
1326 | ||
1327 | fail: | |
1328 | kfree(pidff); | |
1329 | return error; | |
1330 | } |