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 down(&opl3->access_mutex); 56 if (opl3->used) { 57 up(&opl3->access_mutex); 58 return -EBUSY; 59 } 60 opl3->used++; 61 up(&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 down(&opl3->access_mutex); 95 opl3->used--; 96 up(&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) 306