linux/sound/synth/emux/emux_oss.c
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   1/*
   2 *  Interface for OSS sequencer emulation
   3 *
   4 *  Copyright (C) 1999 Takashi Iwai <tiwai@suse.de>
   5 *
   6 *   This program is free software; you can redistribute it and/or modify
   7 *   it under the terms of the GNU General Public License as published by
   8 *   the Free Software Foundation; either version 2 of the License, or
   9 *   (at your option) any later version.
  10 *
  11 *   This program is distributed in the hope that it will be useful,
  12 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 *   GNU General Public License for more details.
  15 *
  16 *   You should have received a copy of the GNU General Public License
  17 *   along with this program; if not, write to the Free Software
  18 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19 *
  20 * Changes
  21 * 19990227   Steve Ratcliffe   Made separate file and merged in latest
  22 *                              midi emulation.
  23 */
  24
  25
  26#ifdef CONFIG_SND_SEQUENCER_OSS
  27
  28#include <asm/uaccess.h>
  29#include <sound/core.h>
  30#include "emux_voice.h"
  31#include <sound/asoundef.h>
  32
  33static int snd_emux_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure);
  34static int snd_emux_close_seq_oss(struct snd_seq_oss_arg *arg);
  35static int snd_emux_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd,
  36                                  unsigned long ioarg);
  37static int snd_emux_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format,
  38                                       const char __user *buf, int offs, int count);
  39static int snd_emux_reset_seq_oss(struct snd_seq_oss_arg *arg);
  40static int snd_emux_event_oss_input(struct snd_seq_event *ev, int direct,
  41                                    void *private, int atomic, int hop);
  42static void reset_port_mode(struct snd_emux_port *port, int midi_mode);
  43static void emuspec_control(struct snd_emux *emu, struct snd_emux_port *port,
  44                            int cmd, unsigned char *event, int atomic, int hop);
  45static void gusspec_control(struct snd_emux *emu, struct snd_emux_port *port,
  46                            int cmd, unsigned char *event, int atomic, int hop);
  47static void fake_event(struct snd_emux *emu, struct snd_emux_port *port,
  48                       int ch, int param, int val, int atomic, int hop);
  49
  50/* operators */
  51static struct snd_seq_oss_callback oss_callback = {
  52        .owner = THIS_MODULE,
  53        .open = snd_emux_open_seq_oss,
  54        .close = snd_emux_close_seq_oss,
  55        .ioctl = snd_emux_ioctl_seq_oss,
  56        .load_patch = snd_emux_load_patch_seq_oss,
  57        .reset = snd_emux_reset_seq_oss,
  58};
  59
  60
  61/*
  62 * register OSS synth
  63 */
  64
  65void
  66snd_emux_init_seq_oss(struct snd_emux *emu)
  67{
  68        struct snd_seq_oss_reg *arg;
  69        struct snd_seq_device *dev;
  70
  71        if (snd_seq_device_new(emu->card, 0, SNDRV_SEQ_DEV_ID_OSS,
  72                               sizeof(struct snd_seq_oss_reg), &dev) < 0)
  73                return;
  74
  75        emu->oss_synth = dev;
  76        strcpy(dev->name, emu->name);
  77        arg = SNDRV_SEQ_DEVICE_ARGPTR(dev);
  78        arg->type = SYNTH_TYPE_SAMPLE;
  79        arg->subtype = SAMPLE_TYPE_AWE32;
  80        arg->nvoices = emu->max_voices;
  81        arg->oper = oss_callback;
  82        arg->private_data = emu;
  83
  84        /* register to OSS synth table */
  85        snd_device_register(emu->card, dev);
  86}
  87
  88
  89/*
  90 * unregister
  91 */
  92void
  93snd_emux_detach_seq_oss(struct snd_emux *emu)
  94{
  95        if (emu->oss_synth) {
  96                snd_device_free(emu->card, emu->oss_synth);
  97                emu->oss_synth = NULL;
  98        }
  99}
 100
 101
 102/* use port number as a unique soundfont client number */
 103#define SF_CLIENT_NO(p) ((p) + 0x1000)
 104
 105/*
 106 * open port for OSS sequencer
 107 */
 108static int
 109snd_emux_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure)
 110{
 111        struct snd_emux *emu;
 112        struct snd_emux_port *p;
 113        struct snd_seq_port_callback callback;
 114        char tmpname[64];
 115
 116        emu = closure;
 117        if (snd_BUG_ON(!arg || !emu))
 118                return -ENXIO;
 119
 120        mutex_lock(&emu->register_mutex);
 121
 122        if (!snd_emux_inc_count(emu)) {
 123                mutex_unlock(&emu->register_mutex);
 124                return -EFAULT;
 125        }
 126
 127        memset(&callback, 0, sizeof(callback));
 128        callback.owner = THIS_MODULE;
 129        callback.event_input = snd_emux_event_oss_input;
 130
 131        sprintf(tmpname, "%s OSS Port", emu->name);
 132        p = snd_emux_create_port(emu, tmpname, 32,
 133                                 1, &callback);
 134        if (p == NULL) {
 135                snd_printk("can't create port\n");
 136                snd_emux_dec_count(emu);
 137                mutex_unlock(&emu->register_mutex);
 138                return -ENOMEM;
 139        }
 140
 141        /* fill the argument data */
 142        arg->private_data = p;
 143        arg->addr.client = p->chset.client;
 144        arg->addr.port = p->chset.port;
 145        p->oss_arg = arg;
 146
 147        reset_port_mode(p, arg->seq_mode);
 148
 149        snd_emux_reset_port(p);
 150
 151        mutex_unlock(&emu->register_mutex);
 152        return 0;
 153}
 154
 155
 156#define DEFAULT_DRUM_FLAGS      ((1<<9) | (1<<25))
 157
 158/*
 159 * reset port mode
 160 */
 161static void
 162reset_port_mode(struct snd_emux_port *port, int midi_mode)
 163{
 164        if (midi_mode) {
 165                port->port_mode = SNDRV_EMUX_PORT_MODE_OSS_MIDI;
 166                port->drum_flags = DEFAULT_DRUM_FLAGS;
 167                port->volume_atten = 0;
 168                port->oss_arg->event_passing = SNDRV_SEQ_OSS_PROCESS_KEYPRESS;
 169        } else {
 170                port->port_mode = SNDRV_EMUX_PORT_MODE_OSS_SYNTH;
 171                port->drum_flags = 0;
 172                port->volume_atten = 32;
 173                port->oss_arg->event_passing = SNDRV_SEQ_OSS_PROCESS_EVENTS;
 174        }
 175}
 176
 177
 178/*
 179 * close port
 180 */
 181static int
 182snd_emux_close_seq_oss(struct snd_seq_oss_arg *arg)
 183{
 184        struct snd_emux *emu;
 185        struct snd_emux_port *p;
 186
 187        if (snd_BUG_ON(!arg))
 188                return -ENXIO;
 189        p = arg->private_data;
 190        if (snd_BUG_ON(!p))
 191                return -ENXIO;
 192
 193        emu = p->emu;
 194        if (snd_BUG_ON(!emu))
 195                return -ENXIO;
 196
 197        mutex_lock(&emu->register_mutex);
 198        snd_emux_sounds_off_all(p);
 199        snd_soundfont_close_check(emu->sflist, SF_CLIENT_NO(p->chset.port));
 200        snd_seq_event_port_detach(p->chset.client, p->chset.port);
 201        snd_emux_dec_count(emu);
 202
 203        mutex_unlock(&emu->register_mutex);
 204        return 0;
 205}
 206
 207
 208/*
 209 * load patch
 210 */
 211static int
 212snd_emux_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format,
 213                            const char __user *buf, int offs, int count)
 214{
 215        struct snd_emux *emu;
 216        struct snd_emux_port *p;
 217        int rc;
 218
 219        if (snd_BUG_ON(!arg))
 220                return -ENXIO;
 221        p = arg->private_data;
 222        if (snd_BUG_ON(!p))
 223                return -ENXIO;
 224
 225        emu = p->emu;
 226        if (snd_BUG_ON(!emu))
 227                return -ENXIO;
 228
 229        if (format == GUS_PATCH)
 230                rc = snd_soundfont_load_guspatch(emu->sflist, buf, count,
 231                                                 SF_CLIENT_NO(p->chset.port));
 232        else if (format == SNDRV_OSS_SOUNDFONT_PATCH) {
 233                struct soundfont_patch_info patch;
 234                if (count < (int)sizeof(patch))
 235                        rc = -EINVAL;
 236                if (copy_from_user(&patch, buf, sizeof(patch)))
 237                        rc = -EFAULT;
 238                if (patch.type >= SNDRV_SFNT_LOAD_INFO &&
 239                    patch.type <= SNDRV_SFNT_PROBE_DATA)
 240                        rc = snd_soundfont_load(emu->sflist, buf, count, SF_CLIENT_NO(p->chset.port));
 241                else {
 242                        if (emu->ops.load_fx)
 243                                rc = emu->ops.load_fx(emu, patch.type, patch.optarg, buf, count);
 244                        else
 245                                rc = -EINVAL;
 246                }
 247        } else
 248                rc = 0;
 249        return rc;
 250}
 251
 252
 253/*
 254 * ioctl
 255 */
 256static int
 257snd_emux_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd, unsigned long ioarg)
 258{
 259        struct snd_emux_port *p;
 260        struct snd_emux *emu;
 261
 262        if (snd_BUG_ON(!arg))
 263                return -ENXIO;
 264        p = arg->private_data;
 265        if (snd_BUG_ON(!p))
 266                return -ENXIO;
 267
 268        emu = p->emu;
 269        if (snd_BUG_ON(!emu))
 270                return -ENXIO;
 271
 272        switch (cmd) {
 273        case SNDCTL_SEQ_RESETSAMPLES:
 274                snd_soundfont_remove_samples(emu->sflist);
 275                return 0;
 276                        
 277        case SNDCTL_SYNTH_MEMAVL:
 278                if (emu->memhdr)
 279                        return snd_util_mem_avail(emu->memhdr);
 280                return 0;
 281        }
 282
 283        return 0;
 284}
 285
 286
 287/*
 288 * reset device
 289 */
 290static int
 291snd_emux_reset_seq_oss(struct snd_seq_oss_arg *arg)
 292{
 293        struct snd_emux_port *p;
 294
 295        if (snd_BUG_ON(!arg))
 296                return -ENXIO;
 297        p = arg->private_data;
 298        if (snd_BUG_ON(!p))
 299                return -ENXIO;
 300        snd_emux_reset_port(p);
 301        return 0;
 302}
 303
 304
 305/*
 306 * receive raw events: only SEQ_PRIVATE is accepted.
 307 */
 308static int
 309snd_emux_event_oss_input(struct snd_seq_event *ev, int direct, void *private_data,
 310                         int atomic, int hop)
 311{
 312        struct snd_emux *emu;
 313        struct snd_emux_port *p;
 314        unsigned char cmd, *data;
 315
 316        p = private_data;
 317        if (snd_BUG_ON(!p))
 318                return -EINVAL;
 319        emu = p->emu;
 320        if (snd_BUG_ON(!emu))
 321                return -EINVAL;
 322        if (ev->type != SNDRV_SEQ_EVENT_OSS)
 323                return snd_emux_event_input(ev, direct, private_data, atomic, hop);
 324
 325        data = ev->data.raw8.d;
 326        /* only SEQ_PRIVATE is accepted */
 327        if (data[0] != 0xfe)
 328                return 0;
 329        cmd = data[2] & _EMUX_OSS_MODE_VALUE_MASK;
 330        if (data[2] & _EMUX_OSS_MODE_FLAG)
 331                emuspec_control(emu, p, cmd, data, atomic, hop);
 332        else
 333                gusspec_control(emu, p, cmd, data, atomic, hop);
 334        return 0;
 335}
 336
 337
 338/*
 339 * OSS/AWE driver specific h/w controls
 340 */
 341static void
 342emuspec_control(struct snd_emux *emu, struct snd_emux_port *port, int cmd,
 343                unsigned char *event, int atomic, int hop)
 344{
 345        int voice;
 346        unsigned short p1;
 347        short p2;
 348        int i;
 349        struct snd_midi_channel *chan;
 350
 351        voice = event[3];
 352        if (voice < 0 || voice >= port->chset.max_channels)
 353                chan = NULL;
 354        else
 355                chan = &port->chset.channels[voice];
 356
 357        p1 = *(unsigned short *) &event[4];
 358        p2 = *(short *) &event[6];
 359
 360        switch (cmd) {
 361#if 0 /* don't do this atomically */
 362        case _EMUX_OSS_REMOVE_LAST_SAMPLES:
 363                snd_soundfont_remove_unlocked(emu->sflist);
 364                break;
 365#endif
 366        case _EMUX_OSS_SEND_EFFECT:
 367                if (chan)
 368                        snd_emux_send_effect_oss(port, chan, p1, p2);
 369                break;
 370                
 371        case _EMUX_OSS_TERMINATE_ALL:
 372                snd_emux_terminate_all(emu);
 373                break;
 374
 375        case _EMUX_OSS_TERMINATE_CHANNEL:
 376                /*snd_emux_mute_channel(emu, chan);*/
 377                break;
 378        case _EMUX_OSS_RESET_CHANNEL:
 379                /*snd_emux_channel_init(chset, chan);*/
 380                break;
 381
 382        case _EMUX_OSS_RELEASE_ALL:
 383                fake_event(emu, port, voice, MIDI_CTL_ALL_NOTES_OFF, 0, atomic, hop);
 384                break;
 385        case _EMUX_OSS_NOTEOFF_ALL:
 386                fake_event(emu, port, voice, MIDI_CTL_ALL_SOUNDS_OFF, 0, atomic, hop);
 387                break;
 388
 389        case _EMUX_OSS_INITIAL_VOLUME:
 390                if (p2) {
 391                        port->volume_atten = (short)p1;
 392                        snd_emux_update_port(port, SNDRV_EMUX_UPDATE_VOLUME);
 393                }
 394                break;
 395
 396        case _EMUX_OSS_CHN_PRESSURE:
 397                if (chan) {
 398                        chan->midi_pressure = p1;
 399                        snd_emux_update_channel(port, chan, SNDRV_EMUX_UPDATE_FMMOD|SNDRV_EMUX_UPDATE_FM2FRQ2);
 400                }
 401                break;
 402
 403        case _EMUX_OSS_CHANNEL_MODE:
 404                reset_port_mode(port, p1);
 405                snd_emux_reset_port(port);
 406                break;
 407
 408        case _EMUX_OSS_DRUM_CHANNELS:
 409                port->drum_flags = *(unsigned int*)&event[4];
 410                for (i = 0; i < port->chset.max_channels; i++) {
 411                        chan = &port->chset.channels[i];
 412                        chan->drum_channel = ((port->drum_flags >> i) & 1) ? 1 : 0;
 413                }
 414                break;
 415
 416        case _EMUX_OSS_MISC_MODE:
 417                if (p1 < EMUX_MD_END)
 418                        port->ctrls[p1] = p2;
 419                break;
 420        case _EMUX_OSS_DEBUG_MODE:
 421                break;
 422
 423        default:
 424                if (emu->ops.oss_ioctl)
 425                        emu->ops.oss_ioctl(emu, cmd, p1, p2);
 426                break;
 427        }
 428}
 429
 430/*
 431 * GUS specific h/w controls
 432 */
 433
 434#include <linux/ultrasound.h>
 435
 436static void
 437gusspec_control(struct snd_emux *emu, struct snd_emux_port *port, int cmd,
 438                unsigned char *event, int atomic, int hop)
 439{
 440        int voice;
 441        unsigned short p1;
 442        short p2;
 443        int plong;
 444        struct snd_midi_channel *chan;
 445
 446        if (port->port_mode != SNDRV_EMUX_PORT_MODE_OSS_SYNTH)
 447                return;
 448        if (cmd == _GUS_NUMVOICES)
 449                return;
 450        voice = event[3];
 451        if (voice < 0 || voice >= port->chset.max_channels)
 452                return;
 453
 454        chan = &port->chset.channels[voice];
 455
 456        p1 = *(unsigned short *) &event[4];
 457        p2 = *(short *) &event[6];
 458        plong = *(int*) &event[4];
 459
 460        switch (cmd) {
 461        case _GUS_VOICESAMPLE:
 462                chan->midi_program = p1;
 463                return;
 464
 465        case _GUS_VOICEBALA:
 466                /* 0 to 15 --> 0 to 127 */
 467                chan->control[MIDI_CTL_MSB_PAN] = (int)p1 << 3;
 468                snd_emux_update_channel(port, chan, SNDRV_EMUX_UPDATE_PAN);
 469                return;
 470
 471        case _GUS_VOICEVOL:
 472        case _GUS_VOICEVOL2:
 473                /* not supported yet */
 474                return;
 475
 476        case _GUS_RAMPRANGE:
 477        case _GUS_RAMPRATE:
 478        case _GUS_RAMPMODE:
 479        case _GUS_RAMPON:
 480        case _GUS_RAMPOFF:
 481                /* volume ramping not supported */
 482                return;
 483
 484        case _GUS_VOLUME_SCALE:
 485                return;
 486
 487        case _GUS_VOICE_POS:
 488#ifdef SNDRV_EMUX_USE_RAW_EFFECT
 489                snd_emux_send_effect(port, chan, EMUX_FX_SAMPLE_START,
 490                                     (short)(plong & 0x7fff),
 491                                     EMUX_FX_FLAG_SET);
 492                snd_emux_send_effect(port, chan, EMUX_FX_COARSE_SAMPLE_START,
 493                                     (plong >> 15) & 0xffff,
 494                                     EMUX_FX_FLAG_SET);
 495#endif
 496                return;
 497        }
 498}
 499
 500
 501/*
 502 * send an event to midi emulation
 503 */
 504static void
 505fake_event(struct snd_emux *emu, struct snd_emux_port *port, int ch, int param, int val, int atomic, int hop)
 506{
 507        struct snd_seq_event ev;
 508        memset(&ev, 0, sizeof(ev));
 509        ev.type = SNDRV_SEQ_EVENT_CONTROLLER;
 510        ev.data.control.channel = ch;
 511        ev.data.control.param = param;
 512        ev.data.control.value = val;
 513        snd_emux_event_input(&ev, 0, port, atomic, hop);
 514}
 515
 516#endif /* CONFIG_SND_SEQUENCER_OSS */
 517
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