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Linux/sound/synth/emux/emux_oss.c

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  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 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                                                  SF_CLIENT_NO(p->chset.port));
210         else if (format == SNDRV_OSS_SOUNDFONT_PATCH) {
211                 struct soundfont_patch_info patch;
212                 if (count < (int)sizeof(patch))
213                         return -EINVAL;
214                 if (copy_from_user(&patch, buf, sizeof(patch)))
215                         return -EFAULT;
216                 if (patch.type >= SNDRV_SFNT_LOAD_INFO &&
217                     patch.type <= SNDRV_SFNT_PROBE_DATA)
218                         rc = snd_soundfont_load(emu->sflist, buf, count, SF_CLIENT_NO(p->chset.port));
219                 else {
220                         if (emu->ops.load_fx)
221                                 rc = emu->ops.load_fx(emu, patch.type, patch.optarg, buf, count);
222                         else
223                                 rc = -EINVAL;
224                 }
225         } else
226                 rc = 0;
227         return rc;
228 }
229 
230 
231 /*
232  * ioctl
233  */
234 static int
235 snd_emux_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd, unsigned long ioarg)
236 {
237         struct snd_emux_port *p;
238         struct snd_emux *emu;
239 
240         if (snd_BUG_ON(!arg))
241                 return -ENXIO;
242         p = arg->private_data;
243         if (snd_BUG_ON(!p))
244                 return -ENXIO;
245 
246         emu = p->emu;
247         if (snd_BUG_ON(!emu))
248                 return -ENXIO;
249 
250         switch (cmd) {
251         case SNDCTL_SEQ_RESETSAMPLES:
252                 snd_soundfont_remove_samples(emu->sflist);
253                 return 0;
254                         
255         case SNDCTL_SYNTH_MEMAVL:
256                 if (emu->memhdr)
257                         return snd_util_mem_avail(emu->memhdr);
258                 return 0;
259         }
260 
261         return 0;
262 }
263 
264 
265 /*
266  * reset device
267  */
268 static int
269 snd_emux_reset_seq_oss(struct snd_seq_oss_arg *arg)
270 {
271         struct snd_emux_port *p;
272 
273         if (snd_BUG_ON(!arg))
274                 return -ENXIO;
275         p = arg->private_data;
276         if (snd_BUG_ON(!p))
277                 return -ENXIO;
278         snd_emux_reset_port(p);
279         return 0;
280 }
281 
282 
283 /*
284  * receive raw events: only SEQ_PRIVATE is accepted.
285  */
286 static int
287 snd_emux_event_oss_input(struct snd_seq_event *ev, int direct, void *private_data,
288                          int atomic, int hop)
289 {
290         struct snd_emux *emu;
291         struct snd_emux_port *p;
292         unsigned char cmd, *data;
293 
294         p = private_data;
295         if (snd_BUG_ON(!p))
296                 return -EINVAL;
297         emu = p->emu;
298         if (snd_BUG_ON(!emu))
299                 return -EINVAL;
300         if (ev->type != SNDRV_SEQ_EVENT_OSS)
301                 return snd_emux_event_input(ev, direct, private_data, atomic, hop);
302 
303         data = ev->data.raw8.d;
304         /* only SEQ_PRIVATE is accepted */
305         if (data[0] != 0xfe)
306                 return 0;
307         cmd = data[2] & _EMUX_OSS_MODE_VALUE_MASK;
308         if (data[2] & _EMUX_OSS_MODE_FLAG)
309                 emuspec_control(emu, p, cmd, data, atomic, hop);
310         else
311                 gusspec_control(emu, p, cmd, data, atomic, hop);
312         return 0;
313 }
314 
315 
316 /*
317  * OSS/AWE driver specific h/w controls
318  */
319 static void
320 emuspec_control(struct snd_emux *emu, struct snd_emux_port *port, int cmd,
321                 unsigned char *event, int atomic, int hop)
322 {
323         int voice;
324         unsigned short p1;
325         short p2;
326         int i;
327         struct snd_midi_channel *chan;
328 
329         voice = event[3];
330         if (voice < 0 || voice >= port->chset.max_channels)
331                 chan = NULL;
332         else
333                 chan = &port->chset.channels[voice];
334 
335         p1 = *(unsigned short *) &event[4];
336         p2 = *(short *) &event[6];
337 
338         switch (cmd) {
339 #if 0 /* don't do this atomically */
340         case _EMUX_OSS_REMOVE_LAST_SAMPLES:
341                 snd_soundfont_remove_unlocked(emu->sflist);
342                 break;
343 #endif
344         case _EMUX_OSS_SEND_EFFECT:
345                 if (chan)
346                         snd_emux_send_effect_oss(port, chan, p1, p2);
347                 break;
348                 
349         case _EMUX_OSS_TERMINATE_ALL:
350                 snd_emux_terminate_all(emu);
351                 break;
352 
353         case _EMUX_OSS_TERMINATE_CHANNEL:
354                 /*snd_emux_mute_channel(emu, chan);*/
355                 break;
356         case _EMUX_OSS_RESET_CHANNEL:
357                 /*snd_emux_channel_init(chset, chan);*/
358                 break;
359 
360         case _EMUX_OSS_RELEASE_ALL:
361                 fake_event(emu, port, voice, MIDI_CTL_ALL_NOTES_OFF, 0, atomic, hop);
362                 break;
363         case _EMUX_OSS_NOTEOFF_ALL:
364                 fake_event(emu, port, voice, MIDI_CTL_ALL_SOUNDS_OFF, 0, atomic, hop);
365                 break;
366 
367         case _EMUX_OSS_INITIAL_VOLUME:
368                 if (p2) {
369                         port->volume_atten = (short)p1;
370                         snd_emux_update_port(port, SNDRV_EMUX_UPDATE_VOLUME);
371                 }
372                 break;
373 
374         case _EMUX_OSS_CHN_PRESSURE:
375                 if (chan) {
376                         chan->midi_pressure = p1;
377                         snd_emux_update_channel(port, chan, SNDRV_EMUX_UPDATE_FMMOD|SNDRV_EMUX_UPDATE_FM2FRQ2);
378                 }
379                 break;
380 
381         case _EMUX_OSS_CHANNEL_MODE:
382                 reset_port_mode(port, p1);
383                 snd_emux_reset_port(port);
384                 break;
385 
386         case _EMUX_OSS_DRUM_CHANNELS:
387                 port->drum_flags = *(unsigned int*)&event[4];
388                 for (i = 0; i < port->chset.max_channels; i++) {
389                         chan = &port->chset.channels[i];
390                         chan->drum_channel = ((port->drum_flags >> i) & 1) ? 1 : 0;
391                 }
392                 break;
393 
394         case _EMUX_OSS_MISC_MODE:
395                 if (p1 < EMUX_MD_END)
396                         port->ctrls[p1] = p2;
397                 break;
398         case _EMUX_OSS_DEBUG_MODE:
399                 break;
400 
401         default:
402                 if (emu->ops.oss_ioctl)
403                         emu->ops.oss_ioctl(emu, cmd, p1, p2);
404                 break;
405         }
406 }
407 
408 /*
409  * GUS specific h/w controls
410  */
411 
412 #include <linux/ultrasound.h>
413 
414 static void
415 gusspec_control(struct snd_emux *emu, struct snd_emux_port *port, int cmd,
416                 unsigned char *event, int atomic, int hop)
417 {
418         int voice;
419         unsigned short p1;
420         int plong;
421         struct snd_midi_channel *chan;
422 
423         if (port->port_mode != SNDRV_EMUX_PORT_MODE_OSS_SYNTH)
424                 return;
425         if (cmd == _GUS_NUMVOICES)
426                 return;
427         voice = event[3];
428         if (voice < 0 || voice >= port->chset.max_channels)
429                 return;
430 
431         chan = &port->chset.channels[voice];
432 
433         p1 = *(unsigned short *) &event[4];
434         plong = *(int*) &event[4];
435 
436         switch (cmd) {
437         case _GUS_VOICESAMPLE:
438                 chan->midi_program = p1;
439                 return;
440 
441         case _GUS_VOICEBALA:
442                 /* 0 to 15 --> 0 to 127 */
443                 chan->control[MIDI_CTL_MSB_PAN] = (int)p1 << 3;
444                 snd_emux_update_channel(port, chan, SNDRV_EMUX_UPDATE_PAN);
445                 return;
446 
447         case _GUS_VOICEVOL:
448         case _GUS_VOICEVOL2:
449                 /* not supported yet */
450                 return;
451 
452         case _GUS_RAMPRANGE:
453         case _GUS_RAMPRATE:
454         case _GUS_RAMPMODE:
455         case _GUS_RAMPON:
456         case _GUS_RAMPOFF:
457                 /* volume ramping not supported */
458                 return;
459 
460         case _GUS_VOLUME_SCALE:
461                 return;
462 
463         case _GUS_VOICE_POS:
464 #ifdef SNDRV_EMUX_USE_RAW_EFFECT
465                 snd_emux_send_effect(port, chan, EMUX_FX_SAMPLE_START,
466                                      (short)(plong & 0x7fff),
467                                      EMUX_FX_FLAG_SET);
468                 snd_emux_send_effect(port, chan, EMUX_FX_COARSE_SAMPLE_START,
469                                      (plong >> 15) & 0xffff,
470                                      EMUX_FX_FLAG_SET);
471 #endif
472                 return;
473         }
474 }
475 
476 
477 /*
478  * send an event to midi emulation
479  */
480 static void
481 fake_event(struct snd_emux *emu, struct snd_emux_port *port, int ch, int param, int val, int atomic, int hop)
482 {
483         struct snd_seq_event ev;
484         memset(&ev, 0, sizeof(ev));
485         ev.type = SNDRV_SEQ_EVENT_CONTROLLER;
486         ev.data.control.channel = ch;
487         ev.data.control.param = param;
488         ev.data.control.value = val;
489         snd_emux_event_input(&ev, 0, port, atomic, hop);
490 }
491 

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