sound/drivers/opl3/opl3_seq.c

   1 /*
   2  *  Copyright (c) by Uros Bizjak <uros@kss-loka.si>
   3  *
   4  *  Midi Sequencer interface routines for OPL2/OPL3/OPL4 FM
   5  *
   6  *  OPL2/3 FM instrument loader:
   7  *   alsa-tools/seq/sbiload/
   8  *
   9  *   This program is free software; you can redistribute it and/or modify
  10  *   it under the terms of the GNU General Public License as published by
  11  *   the Free Software Foundation; either version 2 of the License, or
  12  *   (at your option) any later version.
  13  *
  14  *   This program is distributed in the hope that it will be useful,
  15  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *   GNU General Public License for more details.
  18  *
  19  *   You should have received a copy of the GNU General Public License
  20  *   along with this program; if not, write to the Free Software
  21  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  22  *
  23  */
  24
  25 #include "opl3_voice.h"
  26 #include <linux/init.h>
  27 #include <linux/moduleparam.h>
  28 #include <sound/initval.h>
  29
  30 MODULE_AUTHOR("Uros Bizjak <uros@kss-loka.si>");
  31 MODULE_LICENSE("GPL");
  32 MODULE_DESCRIPTION("ALSA driver for OPL3 FM synth");
  33
  34 int use_internal_drums = 0;
  35 module_param(use_internal_drums, bool, 0444);
  36 MODULE_PARM_DESC(use_internal_drums, "Enable internal OPL2/3 drums.");
  37
  38 int snd_opl3_synth_use_inc(struct snd_opl3 * opl3)
  39 {
  40         if (!try_module_get(opl3->card->module))
  41                 return -EFAULT;
  42         return 0;
  43
  44 }
  45
  46 void snd_opl3_synth_use_dec(struct snd_opl3 * opl3)
  47 {
  48         module_put(opl3->card->module);
  49 }
  50
  51 int snd_opl3_synth_setup(struct snd_opl3 * opl3)
  52 {
  53         int idx;
  54
  55         mutex_lock(&opl3->access_mutex);
  56         if (opl3->used) {
  57                 mutex_unlock(&opl3->access_mutex);
  58                 return -EBUSY;
  59         }
  60         opl3->used++;
  61         mutex_unlock(&opl3->access_mutex);
  62
  63         snd_opl3_reset(opl3);
  64
  65         for (idx = 0; idx < MAX_OPL3_VOICES; idx++) {
  66                 opl3->voices[idx].state = SNDRV_OPL3_ST_OFF;
  67                 opl3->voices[idx].time = 0;
  68                 opl3->voices[idx].keyon_reg = 0x00;
  69         }
  70         opl3->use_time = 0;
  71         opl3->connection_reg = 0x00;
  72         if (opl3->hardware >= OPL3_HW_OPL3) {
  73                 /* Clear 4-op connections */
  74                 opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT,
  75                                  opl3->connection_reg);
  76                 opl3->max_voices = MAX_OPL3_VOICES;
  77         }
  78         return 0;
  79 }
  80
  81 void snd_opl3_synth_cleanup(struct snd_opl3 * opl3)
  82 {
  83         unsigned long flags;
  84
  85         /* Stop system timer */
  86         spin_lock_irqsave(&opl3->sys_timer_lock, flags);
  87         if (opl3->sys_timer_status) {
  88                 del_timer(&opl3->tlist);
  89                 opl3->sys_timer_status = 0;
  90         }
  91         spin_unlock_irqrestore(&opl3->sys_timer_lock, flags);
  92
  93         snd_opl3_reset(opl3);
  94         mutex_lock(&opl3->access_mutex);
  95         opl3->used--;
  96         mutex_unlock(&opl3->access_mutex);
  97 }
  98
  99 static int snd_opl3_synth_use(void *private_data, struct snd_seq_port_subscribe * info)
 100 {
 101         struct snd_opl3 *opl3 = private_data;
 102         int err;
 103
 104         if ((err = snd_opl3_synth_setup(opl3)) < 0)
 105                 return err;
 106
 107         if (use_internal_drums) {
 108                 /* Percussion mode */
 109                 opl3->voices[6].state = opl3->voices[7].state =
 110                         opl3->voices[8].state = SNDRV_OPL3_ST_NOT_AVAIL;
 111                 snd_opl3_load_drums(opl3);
 112                 opl3->drum_reg = OPL3_PERCUSSION_ENABLE;
 113                 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, opl3->drum_reg);
 114         } else {
 115                 opl3->drum_reg = 0x00;
 116         }
 117
 118         if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM) {
 119                 if ((err = snd_opl3_synth_use_inc(opl3)) < 0)
 120                         return err;
 121         }
 122         opl3->synth_mode = SNDRV_OPL3_MODE_SEQ;
 123         return 0;
 124 }
 125
 126 static int snd_opl3_synth_unuse(void *private_data, struct snd_seq_port_subscribe * info)
 127 {
 128         struct snd_opl3 *opl3 = private_data;
 129
 130         snd_opl3_synth_cleanup(opl3);
 131
 132         if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM)
 133                 snd_opl3_synth_use_dec(opl3);
 134         return 0;
 135 }
 136
 137 /*
 138  * MIDI emulation operators
 139  */
 140 struct snd_midi_op opl3_ops = {
 141         .note_on =              snd_opl3_note_on,
 142         .note_off =             snd_opl3_note_off,
 143         .key_press =            snd_opl3_key_press,
 144         .note_terminate =       snd_opl3_terminate_note,
 145         .control =              snd_opl3_control,
 146         .nrpn =                 snd_opl3_nrpn,
 147         .sysex =                snd_opl3_sysex,
 148 };
 149
 150 static int snd_opl3_synth_event_input(struct snd_seq_event * ev, int direct,
 151                                       void *private_data, int atomic, int hop)
 152 {
 153         struct snd_opl3 *opl3 = private_data;
 154
 155         if (ev->type >= SNDRV_SEQ_EVENT_INSTR_BEGIN &&
 156             ev->type <= SNDRV_SEQ_EVENT_INSTR_CHANGE) {
 157                 if (direct) {
 158                         snd_seq_instr_event(&opl3->fm_ops, opl3->ilist, ev,
 159                                             opl3->seq_client, atomic, hop);
 160                 }
 161         } else {
 162                 snd_midi_process_event(&opl3_ops, ev, opl3->chset);
 163         }
 164         return 0;
 165 }
 166
 167 /* ------------------------------ */
 168
 169 static void snd_opl3_synth_free_port(void *private_data)
 170 {
 171         struct snd_opl3 *opl3 = private_data;
 172
 173         snd_midi_channel_free_set(opl3->chset);
 174 }
 175
 176 static int snd_opl3_synth_create_port(struct snd_opl3 * opl3)
 177 {
 178         struct snd_seq_port_callback callbacks;
 179         char name[32];
 180         int voices, opl_ver;
 181
 182         voices = (opl3->hardware < OPL3_HW_OPL3) ?
 183                 MAX_OPL2_VOICES : MAX_OPL3_VOICES;
 184         opl3->chset = snd_midi_channel_alloc_set(16);
 185         if (opl3->chset == NULL)
 186                 return -ENOMEM;
 187         opl3->chset->private_data = opl3;
 188
 189         memset(&callbacks, 0, sizeof(callbacks));
 190         callbacks.owner = THIS_MODULE;
 191         callbacks.use = snd_opl3_synth_use;
 192         callbacks.unuse = snd_opl3_synth_unuse;
 193         callbacks.event_input = snd_opl3_synth_event_input;
 194         callbacks.private_free = snd_opl3_synth_free_port;
 195         callbacks.private_data = opl3;
 196
 197         opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8;
 198         sprintf(name, "OPL%i FM Port", opl_ver);
 199
 200         opl3->chset->client = opl3->seq_client;
 201         opl3->chset->port = snd_seq_event_port_attach(opl3->seq_client, &callbacks,
 202                                                       SNDRV_SEQ_PORT_CAP_WRITE |
 203                                                       SNDRV_SEQ_PORT_CAP_SUBS_WRITE,
 204                                                       SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
 205                                                       SNDRV_SEQ_PORT_TYPE_MIDI_GM |
 206                                                       SNDRV_SEQ_PORT_TYPE_SYNTH,
 207                                                       16, voices,
 208                                                       name);
 209         if (opl3->chset->port < 0) {
 210                 snd_midi_channel_free_set(opl3->chset);
 211                 return opl3->chset->port;
 212         }
 213         return 0;
 214 }
 215
 216 /* ------------------------------ */
 217
 218 static int snd_opl3_seq_new_device(struct snd_seq_device *dev)
 219 {
 220         struct snd_opl3 *opl3;
 221         int client;
 222         char name[32];
 223         int opl_ver;
 224
 225         opl3 = *(struct snd_opl3 **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
 226         if (opl3 == NULL)
 227                 return -EINVAL;
 228
 229         spin_lock_init(&opl3->voice_lock);
 230
 231         opl3->seq_client = -1;
 232
 233         /* allocate new client */
 234         opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8;
 235         sprintf(name, "OPL%i FM synth", opl_ver);
 236         client = opl3->seq_client =
 237                 snd_seq_create_kernel_client(opl3->card, opl3->seq_dev_num,
 238                                              name);
 239         if (client < 0)
 240                 return client;
 241
 242         snd_opl3_synth_create_port(opl3);
 243
 244         /* initialize instrument list */
 245         opl3->ilist = snd_seq_instr_list_new();
 246         if (opl3->ilist == NULL) {
 247                 snd_seq_delete_kernel_client(client);
 248                 opl3->seq_client = -1;
 249                 return -ENOMEM;
 250         }
 251         opl3->ilist->flags = SNDRV_SEQ_INSTR_FLG_DIRECT;
 252         snd_seq_fm_init(&opl3->fm_ops, NULL);
 253
 254         /* setup system timer */
 255         init_timer(&opl3->tlist);
 256         opl3->tlist.function = snd_opl3_timer_func;
 257         opl3->tlist.data = (unsigned long) opl3;
 258         spin_lock_init(&opl3->sys_timer_lock);
 259         opl3->sys_timer_status = 0;
 260
 261 #ifdef CONFIG_SND_SEQUENCER_OSS
 262         snd_opl3_init_seq_oss(opl3, name);
 263 #endif
 264         return 0;
 265 }
 266
 267 static int snd_opl3_seq_delete_device(struct snd_seq_device *dev)
 268 {
 269         struct snd_opl3 *opl3;
 270
 271         opl3 = *(struct snd_opl3 **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
 272         if (opl3 == NULL)
 273                 return -EINVAL;
 274
 275 #ifdef CONFIG_SND_SEQUENCER_OSS
 276         snd_opl3_free_seq_oss(opl3);
 277 #endif
 278         if (opl3->seq_client >= 0) {
 279                 snd_seq_delete_kernel_client(opl3->seq_client);
 280                 opl3->seq_client = -1;
 281         }
 282         if (opl3->ilist)
 283                 snd_seq_instr_list_free(&opl3->ilist);
 284         return 0;
 285 }
 286
 287 static int __init alsa_opl3_seq_init(void)
 288 {
 289         static struct snd_seq_dev_ops ops =
 290         {
 291                 snd_opl3_seq_new_device,
 292                 snd_opl3_seq_delete_device
 293         };
 294
 295         return snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_OPL3, &ops,
 296                                               sizeof(struct snd_opl3 *));
 297 }
 298
 299 static void __exit alsa_opl3_seq_exit(void)
 300 {
 301         snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_OPL3);
 302 }
 303
 304 module_init(alsa_opl3_seq_init)
 305 module_exit(alsa_opl3_seq_exit)