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         snd_midi_process_event(&opl3_ops, ev, opl3->chset);
 156         return 0;
 157 }
 158
 159 /* ------------------------------ */
 160
 161 static void snd_opl3_synth_free_port(void *private_data)
 162 {
 163         struct snd_opl3 *opl3 = private_data;
 164
 165         snd_midi_channel_free_set(opl3->chset);
 166 }
 167
 168 static int snd_opl3_synth_create_port(struct snd_opl3 * opl3)
 169 {
 170         struct snd_seq_port_callback callbacks;
 171         char name[32];
 172         int voices, opl_ver;
 173
 174         voices = (opl3->hardware < OPL3_HW_OPL3) ?
 175                 MAX_OPL2_VOICES : MAX_OPL3_VOICES;
 176         opl3->chset = snd_midi_channel_alloc_set(16);
 177         if (opl3->chset == NULL)
 178                 return -ENOMEM;
 179         opl3->chset->private_data = opl3;
 180
 181         memset(&callbacks, 0, sizeof(callbacks));
 182         callbacks.owner = THIS_MODULE;
 183         callbacks.use = snd_opl3_synth_use;
 184         callbacks.unuse = snd_opl3_synth_unuse;
 185         callbacks.event_input = snd_opl3_synth_event_input;
 186         callbacks.private_free = snd_opl3_synth_free_port;
 187         callbacks.private_data = opl3;
 188
 189         opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8;
 190         sprintf(name, "OPL%i FM Port", opl_ver);
 191
 192         opl3->chset->client = opl3->seq_client;
 193         opl3->chset->port = snd_seq_event_port_attach(opl3->seq_client, &callbacks,
 194                                                       SNDRV_SEQ_PORT_CAP_WRITE |
 195                                                       SNDRV_SEQ_PORT_CAP_SUBS_WRITE,
 196                                                       SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
 197                                                       SNDRV_SEQ_PORT_TYPE_MIDI_GM |
 198                                                       SNDRV_SEQ_PORT_TYPE_DIRECT_SAMPLE |
 199                                                       SNDRV_SEQ_PORT_TYPE_HARDWARE |
 200                                                       SNDRV_SEQ_PORT_TYPE_SYNTHESIZER,
 201                                                       16, voices,
 202                                                       name);
 203         if (opl3->chset->port < 0) {
 204                 int port;
 205                 port = opl3->chset->port;
 206                 snd_midi_channel_free_set(opl3->chset);
 207                 return port;
 208         }
 209         return 0;
 210 }
 211
 212 /* ------------------------------ */
 213
 214 static int snd_opl3_seq_new_device(struct snd_seq_device *dev)
 215 {
 216         struct snd_opl3 *opl3;
 217         int client, err;
 218         char name[32];
 219         int opl_ver;
 220
 221         opl3 = *(struct snd_opl3 **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
 222         if (opl3 == NULL)
 223                 return -EINVAL;
 224
 225         spin_lock_init(&opl3->voice_lock);
 226
 227         opl3->seq_client = -1;
 228
 229         /* allocate new client */
 230         opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8;
 231         sprintf(name, "OPL%i FM synth", opl_ver);
 232         client = opl3->seq_client =
 233                 snd_seq_create_kernel_client(opl3->card, opl3->seq_dev_num,
 234                                              name);
 235         if (client < 0)
 236                 return client;
 237
 238         if ((err = snd_opl3_synth_create_port(opl3)) < 0) {
 239                 snd_seq_delete_kernel_client(client);
 240                 opl3->seq_client = -1;
 241                 return err;
 242         }
 243
 244         /* setup system timer */
 245         init_timer(&opl3->tlist);
 246         opl3->tlist.function = snd_opl3_timer_func;
 247         opl3->tlist.data = (unsigned long) opl3;
 248         spin_lock_init(&opl3->sys_timer_lock);
 249         opl3->sys_timer_status = 0;
 250
 251 #ifdef CONFIG_SND_SEQUENCER_OSS
 252         snd_opl3_init_seq_oss(opl3, name);
 253 #endif
 254         return 0;
 255 }
 256
 257 static int snd_opl3_seq_delete_device(struct snd_seq_device *dev)
 258 {
 259         struct snd_opl3 *opl3;
 260
 261         opl3 = *(struct snd_opl3 **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
 262         if (opl3 == NULL)
 263                 return -EINVAL;
 264
 265 #ifdef CONFIG_SND_SEQUENCER_OSS
 266         snd_opl3_free_seq_oss(opl3);
 267 #endif
 268         if (opl3->seq_client >= 0) {
 269                 snd_seq_delete_kernel_client(opl3->seq_client);
 270                 opl3->seq_client = -1;
 271         }
 272         return 0;
 273 }
 274
 275 static int __init alsa_opl3_seq_init(void)
 276 {
 277         static struct snd_seq_dev_ops ops =
 278         {
 279                 snd_opl3_seq_new_device,
 280                 snd_opl3_seq_delete_device
 281         };
 282
 283         return snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_OPL3, &ops,
 284                                               sizeof(struct snd_opl3 *));
 285 }
 286
 287 static void __exit alsa_opl3_seq_exit(void)
 288 {
 289         snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_OPL3);
 290 }
 291
 292 module_init(alsa_opl3_seq_init)
 293 module_exit(alsa_opl3_seq_exit)