1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Interface for OSS sequencer emulation
4 *
5 * Copyright (C) 1999 Takashi Iwai <tiwai@suse.de>
6 *
7 * Changes
8 * 19990227 Steve Ratcliffe Made separate file and merged in latest
9 * midi emulation.
10 */
11
12
13 #include <linux/export.h>
14 #include <linux/uaccess.h>
15 #include <sound/core.h>
16 #include "emux_voice.h"
17 #include <sound/asoundef.h>
18
19 static int snd_emux_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure);
20 static int snd_emux_close_seq_oss(struct snd_seq_oss_arg *arg);
21 static int snd_emux_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd,
22 unsigned long ioarg);
23 static int snd_emux_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format,
24 const char __user *buf, int offs, int count);
25 static int snd_emux_reset_seq_oss(struct snd_seq_oss_arg *arg);
26 static int snd_emux_event_oss_input(struct snd_seq_event *ev, int direct,
27 void *private, int atomic, int hop);
28 static void reset_port_mode(struct snd_emux_port *port, int midi_mode);
29 static void emuspec_control(struct snd_emux *emu, struct snd_emux_port *port,
30 int cmd, unsigned char *event, int atomic, int hop);
31 static void gusspec_control(struct snd_emux *emu, struct snd_emux_port *port,
32 int cmd, unsigned char *event, int atomic, int hop);
33 static void fake_event(struct snd_emux *emu, struct snd_emux_port *port,
34 int ch, int param, int val, int atomic, int hop);
35
36 /* operators */
37 static const struct snd_seq_oss_callback oss_callback = {
38 .owner = THIS_MODULE,
39 .open = snd_emux_open_seq_oss,
40 .close = snd_emux_close_seq_oss,
41 .ioctl = snd_emux_ioctl_seq_oss,
42 .load_patch = snd_emux_load_patch_seq_oss,
43 .reset = snd_emux_reset_seq_oss,
44 };
45
46
47 /*
48 * register OSS synth
49 */
50
51 void
52 snd_emux_init_seq_oss(struct snd_emux *emu)
53 {
54 struct snd_seq_oss_reg *arg;
55 struct snd_seq_device *dev;
56
57 /* using device#1 here for avoiding conflicts with OPL3 */
58 if (snd_seq_device_new(emu->card, 1, SNDRV_SEQ_DEV_ID_OSS,
59 sizeof(struct snd_seq_oss_reg), &dev) < 0)
60 return;
61
62 emu->oss_synth = dev;
63 strcpy(dev->name, emu->name);
64 arg = SNDRV_SEQ_DEVICE_ARGPTR(dev);
65 arg->type = SYNTH_TYPE_SAMPLE;
66 arg->subtype = SAMPLE_TYPE_AWE32;
67 arg->nvoices = emu->max_voices;
68 arg->oper = oss_callback;
69 arg->private_data = emu;
70
71 /* register to OSS synth table */
72 snd_device_register(emu->card, dev);
73 }
74
75
76 /*
77 * unregister
78 */
79 void
80 snd_emux_detach_seq_oss(struct snd_emux *emu)
81 {
82 if (emu->oss_synth) {
83 snd_device_free(emu->card, emu->oss_synth);
84 emu->oss_synth = NULL;
85 }
86 }
87
88
89 /* use port number as a unique soundfont client number */
90 #define SF_CLIENT_NO(p) ((p) + 0x1000)
91
92 /*
93 * open port for OSS sequencer
94 */
95 static int
96 snd_emux_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure)
97 {
98 struct snd_emux *emu;
99 struct snd_emux_port *p;
100 struct snd_seq_port_callback callback;
101 char tmpname[64];
102
103 emu = closure;
104 if (snd_BUG_ON(!arg || !emu))
105 return -ENXIO;
106
107 if (!snd_emux_inc_count(emu))
108 return -EFAULT;
109
110 memset(&callback, 0, sizeof(callback));
111 callback.owner = THIS_MODULE;
112 callback.event_input = snd_emux_event_oss_input;
113
114 sprintf(tmpname, "%s OSS Port", emu->name);
115 p = snd_emux_create_port(emu, tmpname, 32,
116 1, &callback);
117 if (p == NULL) {
118 snd_printk(KERN_ERR "can't create port\n");
119 snd_emux_dec_count(emu);
120 return -ENOMEM;
121 }
122
123 /* fill the argument data */
124 arg->private_data = p;
125 arg->addr.client = p->chset.client;
126 arg->addr.port = p->chset.port;
127 p->oss_arg = arg;
128
129 reset_port_mode(p, arg->seq_mode);
130
131 snd_emux_reset_port(p);
132 return 0;
133 }
134
135
136 #define DEFAULT_DRUM_FLAGS ((1<<9) | (1<<25))
137
138 /*
139 * reset port mode
140 */
141 static void
142 reset_port_mode(struct snd_emux_port *port, int midi_mode)
143 {
144 if (midi_mode) {
145 port->port_mode = SNDRV_EMUX_PORT_MODE_OSS_MIDI;
146 port->drum_flags = DEFAULT_DRUM_FLAGS;
147 port->volume_atten = 0;
148 port->oss_arg->event_passing = SNDRV_SEQ_OSS_PROCESS_KEYPRESS;
149 } else {
150 port->port_mode = SNDRV_EMUX_PORT_MODE_OSS_SYNTH;
151 port->drum_flags = 0;
152 port->volume_atten = 32;
153 port->oss_arg->event_passing = SNDRV_SEQ_OSS_PROCESS_EVENTS;
154 }
155 }
156
157
158 /*
159 * close port
160 */
161 static int
162 snd_emux_close_seq_oss(struct snd_seq_oss_arg *arg)
163 {
164 struct snd_emux *emu;
165 struct snd_emux_port *p;
166
167 if (snd_BUG_ON(!arg))
168 return -ENXIO;
169 p = arg->private_data;
170 if (snd_BUG_ON(!p))
171 return -ENXIO;
172
173 emu = p->emu;
174 if (snd_BUG_ON(!emu))
175 return -ENXIO;
176
177 snd_emux_sounds_off_all(p);
178 snd_soundfont_close_check(emu->sflist, SF_CLIENT_NO(p->chset.port));
179 snd_seq_event_port_detach(p->chset.client, p->chset.port);
180 snd_emux_dec_count(emu);
181
182 return 0;
183 }
184
185
186 /*
187 * load patch
188 */
189 static int
190 snd_emux_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format,
191 const char __user *buf, int offs, int count)
192 {
193 struct snd_emux *emu;
194 struct snd_emux_port *p;
195 int rc;
196
197 if (snd_BUG_ON(!arg))
198 return -ENXIO;
199 p = arg->private_data;
200 if (snd_BUG_ON(!p))
201 return -ENXIO;
202
203 emu = p->emu;
204 if (snd_BUG_ON(!emu))
205 return -ENXIO;
206
207 if (format == GUS_PATCH)
208 rc = snd_soundfont_load_guspatch(emu->sflist, buf, count);
209 else if (format == SNDRV_OSS_SOUNDFONT_PATCH) {
210 struct soundfont_patch_info patch;
211 if (count < (int)sizeof(patch))
212 return -EINVAL;
213 if (copy_from_user(&patch, buf, sizeof(patch)))
214 return -EFAULT;
215 if (patch.type >= SNDRV_SFNT_LOAD_INFO &&
216 patch.type <= SNDRV_SFNT_PROBE_DATA)
217 rc = snd_soundfont_load(emu->sflist, buf, count, SF_CLIENT_NO(p->chset.port));
218 else {
219 if (emu->ops.load_fx)
220 rc = emu->ops.load_fx(emu, patch.type, patch.optarg, buf, count);
221 else
222 rc = -EINVAL;
223 }
224 } else
225 rc = 0;
226 return rc;
227 }
228
229
230 /*
231 * ioctl
232 */
233 static int
234 snd_emux_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd, unsigned long ioarg)
235 {
236 struct snd_emux_port *p;
237 struct snd_emux *emu;
238
239 if (snd_BUG_ON(!arg))
240 return -ENXIO;
241 p = arg->private_data;
242 if (snd_BUG_ON(!p))
243 return -ENXIO;
244
245 emu = p->emu;
246 if (snd_BUG_ON(!emu))
247 return -ENXIO;
248
249 switch (cmd) {
250 case SNDCTL_SEQ_RESETSAMPLES:
251 snd_soundfont_remove_samples(emu->sflist);
252 return 0;
253
254 case SNDCTL_SYNTH_MEMAVL:
255 if (emu->memhdr)
256 return snd_util_mem_avail(emu->memhdr);
257 return 0;
258 }
259
260 return 0;
261 }
262
263
264 /*
265 * reset device
266 */
267 static int
268 snd_emux_reset_seq_oss(struct snd_seq_oss_arg *arg)
269 {
270 struct snd_emux_port *p;
271
272 if (snd_BUG_ON(!arg))
273 return -ENXIO;
274 p = arg->private_data;
275 if (snd_BUG_ON(!p))
276 return -ENXIO;
277 snd_emux_reset_port(p);
278 return 0;
279 }
280
281
282 /*
283 * receive raw events: only SEQ_PRIVATE is accepted.
284 */
285 static int
286 snd_emux_event_oss_input(struct snd_seq_event *ev, int direct, void *private_data,
287 int atomic, int hop)
288 {
289 struct snd_emux *emu;
290 struct snd_emux_port *p;
291 unsigned char cmd, *data;
292
293 p = private_data;
294 if (snd_BUG_ON(!p))
295 return -EINVAL;
296 emu = p->emu;
297 if (snd_BUG_ON(!emu))
298 return -EINVAL;
299 if (ev->type != SNDRV_SEQ_EVENT_OSS)
300 return snd_emux_event_input(ev, direct, private_data, atomic, hop);
301
302 data = ev->data.raw8.d;
303 /* only SEQ_PRIVATE is accepted */
304 if (data[0] != 0xfe)
305 return 0;
306 cmd = data[2] & _EMUX_OSS_MODE_VALUE_MASK;
307 if (data[2] & _EMUX_OSS_MODE_FLAG)
308 emuspec_control(emu, p, cmd, data, atomic, hop);
309 else
310 gusspec_control(emu, p, cmd, data, atomic, hop);
311 return 0;
312 }
313
314
315 /*
316 * OSS/AWE driver specific h/w controls
317 */
318 static void
319 emuspec_control(struct snd_emux *emu, struct snd_emux_port *port, int cmd,
320 unsigned char *event, int atomic, int hop)
321 {
322 int voice;
323 unsigned short p1;
324 short p2;
325 int i;
326 struct snd_midi_channel *chan;
327
328 voice = event[3];
329 if (voice < 0 || voice >= port->chset.max_channels)
330 chan = NULL;
331 else
332 chan = &port->chset.channels[voice];
333
334 p1 = *(unsigned short *) &event[4];
335 p2 = *(short *) &event[6];
336
337 switch (cmd) {
338 #if 0 /* don't do this atomically */
339 case _EMUX_OSS_REMOVE_LAST_SAMPLES:
340 snd_soundfont_remove_unlocked(emu->sflist);
341 break;
342 #endif
343 case _EMUX_OSS_SEND_EFFECT:
344 if (chan)
345 snd_emux_send_effect_oss(port, chan, p1, p2);
346 break;
347
348 case _EMUX_OSS_TERMINATE_ALL:
349 snd_emux_terminate_all(emu);
350 break;
351
352 case _EMUX_OSS_TERMINATE_CHANNEL:
353 /*snd_emux_mute_channel(emu, chan);*/
354 break;
355 case _EMUX_OSS_RESET_CHANNEL:
356 /*snd_emux_channel_init(chset, chan);*/
357 break;
358
359 case _EMUX_OSS_RELEASE_ALL:
360 fake_event(emu, port, voice, MIDI_CTL_ALL_NOTES_OFF, 0, atomic, hop);
361 break;
362 case _EMUX_OSS_NOTEOFF_ALL:
363 fake_event(emu, port, voice, MIDI_CTL_ALL_SOUNDS_OFF, 0, atomic, hop);
364 break;
365
366 case _EMUX_OSS_INITIAL_VOLUME:
367 if (p2) {
368 port->volume_atten = (short)p1;
369 snd_emux_update_port(port, SNDRV_EMUX_UPDATE_VOLUME);
370 }
371 break;
372
373 case _EMUX_OSS_CHN_PRESSURE:
374 if (chan) {
375 chan->midi_pressure = p1;
376 snd_emux_update_channel(port, chan, SNDRV_EMUX_UPDATE_FMMOD|SNDRV_EMUX_UPDATE_FM2FRQ2);
377 }
378 break;
379
380 case _EMUX_OSS_CHANNEL_MODE:
381 reset_port_mode(port, p1);
382 snd_emux_reset_port(port);
383 break;
384
385 case _EMUX_OSS_DRUM_CHANNELS:
386 port->drum_flags = *(unsigned int*)&event[4];
387 for (i = 0; i < port->chset.max_channels; i++) {
388 chan = &port->chset.channels[i];
389 chan->drum_channel = ((port->drum_flags >> i) & 1) ? 1 : 0;
390 }
391 break;
392
393 case _EMUX_OSS_MISC_MODE:
394 if (p1 < EMUX_MD_END)
395 port->ctrls[p1] = p2;
396 break;
397 case _EMUX_OSS_DEBUG_MODE:
398 break;
399
400 default:
401 if (emu->ops.oss_ioctl)
402 emu->ops.oss_ioctl(emu, cmd, p1, p2);
403 break;
404 }
405 }
406
407 /*
408 * GUS specific h/w controls
409 */
410
411 #include <linux/ultrasound.h>
412
413 static void
414 gusspec_control(struct snd_emux *emu, struct snd_emux_port *port, int cmd,
415 unsigned char *event, int atomic, int hop)
416 {
417 int voice;
418 unsigned short p1;
419 int plong;
420 struct snd_midi_channel *chan;
421
422 if (port->port_mode != SNDRV_EMUX_PORT_MODE_OSS_SYNTH)
423 return;
424 if (cmd == _GUS_NUMVOICES)
425 return;
426 voice = event[3];
427 if (voice < 0 || voice >= port->chset.max_channels)
428 return;
429
430 chan = &port->chset.channels[voice];
431
432 p1 = *(unsigned short *) &event[4];
433 plong = *(int*) &event[4];
434
435 switch (cmd) {
436 case _GUS_VOICESAMPLE:
437 chan->midi_program = p1;
438 return;
439
440 case _GUS_VOICEBALA:
441 /* 0 to 15 --> 0 to 127 */
442 chan->control[MIDI_CTL_MSB_PAN] = (int)p1 << 3;
443 snd_emux_update_channel(port, chan, SNDRV_EMUX_UPDATE_PAN);
444 return;
445
446 case _GUS_VOICEVOL:
447 case _GUS_VOICEVOL2:
448 /* not supported yet */
449 return;
450
451 case _GUS_RAMPRANGE:
452 case _GUS_RAMPRATE:
453 case _GUS_RAMPMODE:
454 case _GUS_RAMPON:
455 case _GUS_RAMPOFF:
456 /* volume ramping not supported */
457 return;
458
459 case _GUS_VOLUME_SCALE:
460 return;
461
462 case _GUS_VOICE_POS:
463 #ifdef SNDRV_EMUX_USE_RAW_EFFECT
464 snd_emux_send_effect(port, chan, EMUX_FX_SAMPLE_START,
465 (short)(plong & 0x7fff),
466 EMUX_FX_FLAG_SET);
467 snd_emux_send_effect(port, chan, EMUX_FX_COARSE_SAMPLE_START,
468 (plong >> 15) & 0xffff,
469 EMUX_FX_FLAG_SET);
470 #endif
471 return;
472 }
473 }
474
475
476 /*
477 * send an event to midi emulation
478 */
479 static void
480 fake_event(struct snd_emux *emu, struct snd_emux_port *port, int ch, int param, int val, int atomic, int hop)
481 {
482 struct snd_seq_event ev;
483 memset(&ev, 0, sizeof(ev));
484 ev.type = SNDRV_SEQ_EVENT_CONTROLLER;
485 ev.data.control.channel = ch;
486 ev.data.control.param = param;
487 ev.data.control.value = val;
488 snd_emux_event_input(&ev, 0, port, atomic, hop);
489 }
490
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