kernel/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 <linux/module.h>
  29 #include <sound/initval.h>
  30
  31 MODULE_AUTHOR("Uros Bizjak <uros@kss-loka.si>");
  32 MODULE_LICENSE("GPL");
  33 MODULE_DESCRIPTION("ALSA driver for OPL3 FM synth");
  34
  35 bool use_internal_drums = 0;
  36 module_param(use_internal_drums, bool, 0444);
  37 MODULE_PARM_DESC(use_internal_drums, "Enable internal OPL2/3 drums.");
  38
  39 int snd_opl3_synth_use_inc(struct snd_opl3 * opl3)
  40 {
  41         if (!try_module_get(opl3->card->module))
  42                 return -EFAULT;
  43         return 0;
  44
  45 }
  46
  47 void snd_opl3_synth_use_dec(struct snd_opl3 * opl3)
  48 {
  49         module_put(opl3->card->module);
  50 }
  51
  52 int snd_opl3_synth_setup(struct snd_opl3 * opl3)
  53 {
  54         int idx;
  55         struct snd_hwdep *hwdep = opl3->hwdep;
  56
  57         mutex_lock(&hwdep->open_mutex);
  58         if (hwdep->used) {
  59                 mutex_unlock(&hwdep->open_mutex);
  60                 return -EBUSY;
  61         }
  62         hwdep->used++;
  63         mutex_unlock(&hwdep->open_mutex);
  64
  65         snd_opl3_reset(opl3);
  66
  67         for (idx = 0; idx < MAX_OPL3_VOICES; idx++) {
  68                 opl3->voices[idx].state = SNDRV_OPL3_ST_OFF;
  69                 opl3->voices[idx].time = 0;
  70                 opl3->voices[idx].keyon_reg = 0x00;
  71         }
  72         opl3->use_time = 0;
  73         opl3->connection_reg = 0x00;
  74         if (opl3->hardware >= OPL3_HW_OPL3) {
  75                 /* Clear 4-op connections */
  76                 opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT,
  77                                  opl3->connection_reg);
  78                 opl3->max_voices = MAX_OPL3_VOICES;
  79         }
  80         return 0;
  81 }
  82
  83 void snd_opl3_synth_cleanup(struct snd_opl3 * opl3)
  84 {
  85         unsigned long flags;
  86         struct snd_hwdep *hwdep;
  87
  88         /* Stop system timer */
  89         spin_lock_irqsave(&opl3->sys_timer_lock, flags);
  90         if (opl3->sys_timer_status) {
  91                 del_timer(&opl3->tlist);
  92                 opl3->sys_timer_status = 0;
  93         }
  94         spin_unlock_irqrestore(&opl3->sys_timer_lock, flags);
  95
  96         snd_opl3_reset(opl3);
  97         hwdep = opl3->hwdep;
  98         mutex_lock(&hwdep->open_mutex);
  99         hwdep->used--;
 100         mutex_unlock(&hwdep->open_mutex);
 101         wake_up(&hwdep->open_wait);
 102 }
 103
 104 static int snd_opl3_synth_use(void *private_data, struct snd_seq_port_subscribe * info)
 105 {
 106         struct snd_opl3 *opl3 = private_data;
 107         int err;
 108
 109         if ((err = snd_opl3_synth_setup(opl3)) < 0)
 110                 return err;
 111
 112         if (use_internal_drums) {
 113                 /* Percussion mode */
 114                 opl3->voices[6].state = opl3->voices[7].state =
 115                         opl3->voices[8].state = SNDRV_OPL3_ST_NOT_AVAIL;
 116                 snd_opl3_load_drums(opl3);
 117                 opl3->drum_reg = OPL3_PERCUSSION_ENABLE;
 118                 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, opl3->drum_reg);
 119         } else {
 120                 opl3->drum_reg = 0x00;
 121         }
 122
 123         if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM) {
 124                 if ((err = snd_opl3_synth_use_inc(opl3)) < 0)
 125                         return err;
 126         }
 127         opl3->synth_mode = SNDRV_OPL3_MODE_SEQ;
 128         return 0;
 129 }
 130
 131 static int snd_opl3_synth_unuse(void *private_data, struct snd_seq_port_subscribe * info)
 132 {
 133         struct snd_opl3 *opl3 = private_data;
 134
 135         snd_opl3_synth_cleanup(opl3);
 136
 137         if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM)
 138                 snd_opl3_synth_use_dec(opl3);
 139         return 0;
 140 }
 141
 142 /*
 143  * MIDI emulation operators
 144  */
 145 struct snd_midi_op opl3_ops = {
 146         .note_on =              snd_opl3_note_on,
 147         .note_off =             snd_opl3_note_off,
 148         .key_press =            snd_opl3_key_press,
 149         .note_terminate =       snd_opl3_terminate_note,
 150         .control =              snd_opl3_control,
 151         .nrpn =                 snd_opl3_nrpn,
 152         .sysex =                snd_opl3_sysex,
 153 };
 154
 155 static int snd_opl3_synth_event_input(struct snd_seq_event * ev, int direct,
 156                                       void *private_data, int atomic, int hop)
 157 {
 158         struct snd_opl3 *opl3 = private_data;
 159
 160         snd_midi_process_event(&opl3_ops, ev, opl3->chset);
 161         return 0;
 162 }
 163
 164 /* ------------------------------ */
 165
 166 static void snd_opl3_synth_free_port(void *private_data)
 167 {
 168         struct snd_opl3 *opl3 = private_data;
 169
 170         snd_midi_channel_free_set(opl3->chset);
 171 }
 172
 173 static int snd_opl3_synth_create_port(struct snd_opl3 * opl3)
 174 {
 175         struct snd_seq_port_callback callbacks;
 176         char name[32];
 177         int voices, opl_ver;
 178
 179         voices = (opl3->hardware < OPL3_HW_OPL3) ?
 180                 MAX_OPL2_VOICES : MAX_OPL3_VOICES;
 181         opl3->chset = snd_midi_channel_alloc_set(16);
 182         if (opl3->chset == NULL)
 183                 return -ENOMEM;
 184         opl3->chset->private_data = opl3;
 185
 186         memset(&callbacks, 0, sizeof(callbacks));
 187         callbacks.owner = THIS_MODULE;
 188         callbacks.use = snd_opl3_synth_use;
 189         callbacks.unuse = snd_opl3_synth_unuse;
 190         callbacks.event_input = snd_opl3_synth_event_input;
 191         callbacks.private_free = snd_opl3_synth_free_port;
 192         callbacks.private_data = opl3;
 193
 194         opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8;
 195         sprintf(name, "OPL%i FM Port", opl_ver);
 196
 197         opl3->chset->client = opl3->seq_client;
 198         opl3->chset->port = snd_seq_event_port_attach(opl3->seq_client, &callbacks,
 199                                                       SNDRV_SEQ_PORT_CAP_WRITE |
 200                                                       SNDRV_SEQ_PORT_CAP_SUBS_WRITE,
 201                                                       SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
 202                                                       SNDRV_SEQ_PORT_TYPE_MIDI_GM |
 203                                                       SNDRV_SEQ_PORT_TYPE_DIRECT_SAMPLE |
 204                                                       SNDRV_SEQ_PORT_TYPE_HARDWARE |
 205                                                       SNDRV_SEQ_PORT_TYPE_SYNTHESIZER,
 206                                                       16, voices,
 207                                                       name);
 208         if (opl3->chset->port < 0) {
 209                 int port;
 210                 port = opl3->chset->port;
 211                 snd_midi_channel_free_set(opl3->chset);
 212                 return port;
 213         }
 214         return 0;
 215 }
 216
 217 /* ------------------------------ */
 218
 219 static int snd_opl3_seq_probe(struct device *_dev)
 220 {
 221         struct snd_seq_device *dev = to_seq_dev(_dev);
 222         struct snd_opl3 *opl3;
 223         int client, err;
 224         char name[32];
 225         int opl_ver;
 226
 227         opl3 = *(struct snd_opl3 **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
 228         if (opl3 == NULL)
 229                 return -EINVAL;
 230
 231         spin_lock_init(&opl3->voice_lock);
 232
 233         opl3->seq_client = -1;
 234
 235         /* allocate new client */
 236         opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8;
 237         sprintf(name, "OPL%i FM synth", opl_ver);
 238         client = opl3->seq_client =
 239                 snd_seq_create_kernel_client(opl3->card, opl3->seq_dev_num,
 240                                              name);
 241         if (client < 0)
 242                 return client;
 243
 244         if ((err = snd_opl3_synth_create_port(opl3)) < 0) {
 245                 snd_seq_delete_kernel_client(client);
 246                 opl3->seq_client = -1;
 247                 return err;
 248         }
 249
 250         /* setup system timer */
 251         setup_timer(&opl3->tlist, snd_opl3_timer_func, (unsigned long) opl3);
 252         spin_lock_init(&opl3->sys_timer_lock);
 253         opl3->sys_timer_status = 0;
 254
 255 #ifdef CONFIG_SND_SEQUENCER_OSS
 256         snd_opl3_init_seq_oss(opl3, name);
 257 #endif
 258         return 0;
 259 }
 260
 261 static int snd_opl3_seq_remove(struct device *_dev)
 262 {
 263         struct snd_seq_device *dev = to_seq_dev(_dev);
 264         struct snd_opl3 *opl3;
 265
 266         opl3 = *(struct snd_opl3 **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
 267         if (opl3 == NULL)
 268                 return -EINVAL;
 269
 270 #ifdef CONFIG_SND_SEQUENCER_OSS
 271         snd_opl3_free_seq_oss(opl3);
 272 #endif
 273         if (opl3->seq_client >= 0) {
 274                 snd_seq_delete_kernel_client(opl3->seq_client);
 275                 opl3->seq_client = -1;
 276         }
 277         return 0;
 278 }
 279
 280 static struct snd_seq_driver opl3_seq_driver = {
 281         .driver = {
 282                 .name = KBUILD_MODNAME,
 283                 .probe = snd_opl3_seq_probe,
 284                 .remove = snd_opl3_seq_remove,
 285         },
 286         .id = SNDRV_SEQ_DEV_ID_OPL3,
 287         .argsize = sizeof(struct snd_opl3 *),
 288 };
 289
 290 module_snd_seq_driver(opl3_seq_driver);