1 /* 2 * Interface for OSS sequencer emulation 3 * 4 * Copyright (C) 2000 Uros Bizjak <uros@kss-loka.si> 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 21 #include "opl3_voice.h" 22 #include <linux/slab.h> 23 24 static int snd_opl3_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure); 25 static int snd_opl3_close_seq_oss(struct snd_seq_oss_arg *arg); 26 static int snd_opl3_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd, unsigned long ioarg); 27 static int snd_opl3_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format, const char __user *buf, int offs, int count); 28 static int snd_opl3_reset_seq_oss(struct snd_seq_oss_arg *arg); 29 30 /* */ 31 32 static inline mm_segment_t snd_enter_user(void) 33 { 34 mm_segment_t fs = get_fs(); 35 set_fs(get_ds()); 36 return fs; 37 } 38 39 static inline void snd_leave_user(mm_segment_t fs) 40 { 41 set_fs(fs); 42 } 43 44 /* operators */ 45 46 extern struct snd_midi_op opl3_ops; 47 48 static struct snd_seq_oss_callback oss_callback = { 49 .owner = THIS_MODULE, 50 .open = snd_opl3_open_seq_oss, 51 .close = snd_opl3_close_seq_oss, 52 .ioctl = snd_opl3_ioctl_seq_oss, 53 .load_patch = snd_opl3_load_patch_seq_oss, 54 .reset = snd_opl3_reset_seq_oss, 55 }; 56 57 static int snd_opl3_oss_event_input(struct snd_seq_event *ev, int direct, 58 void *private_data, int atomic, int hop) 59 { 60 struct snd_opl3 *opl3 = private_data; 61 62 if (ev->type != SNDRV_SEQ_EVENT_OSS) 63 snd_midi_process_event(&opl3_ops, ev, opl3->oss_chset); 64 return 0; 65 } 66 67 /* ------------------------------ */ 68 69 static void snd_opl3_oss_free_port(void *private_data) 70 { 71 struct snd_opl3 *opl3 = private_data; 72 73 snd_midi_channel_free_set(opl3->oss_chset); 74 } 75 76 static int snd_opl3_oss_create_port(struct snd_opl3 * opl3) 77 { 78 struct snd_seq_port_callback callbacks; 79 char name[32]; 80 int voices, opl_ver; 81 82 voices = (opl3->hardware < OPL3_HW_OPL3) ? 83 MAX_OPL2_VOICES : MAX_OPL3_VOICES; 84 opl3->oss_chset = snd_midi_channel_alloc_set(voices); 85 if (opl3->oss_chset == NULL) 86 return -ENOMEM; 87 opl3->oss_chset->private_data = opl3; 88 89 memset(&callbacks, 0, sizeof(callbacks)); 90 callbacks.owner = THIS_MODULE; 91 callbacks.event_input = snd_opl3_oss_event_input; 92 callbacks.private_free = snd_opl3_oss_free_port; 93 callbacks.private_data = opl3; 94 95 opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8; 96 sprintf(name, "OPL%i OSS Port", opl_ver); 97 98 opl3->oss_chset->client = opl3->seq_client; 99 opl3->oss_chset->port = snd_seq_event_port_attach(opl3->seq_client, &callbacks, 100 SNDRV_SEQ_PORT_CAP_WRITE, 101 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | 102 SNDRV_SEQ_PORT_TYPE_MIDI_GM | 103 SNDRV_SEQ_PORT_TYPE_SYNTH, 104 voices, voices, 105 name); 106 if (opl3->oss_chset->port < 0) { 107 int port; 108 port = opl3->oss_chset->port; 109 snd_midi_channel_free_set(opl3->oss_chset); 110 return port; 111 } 112 return 0; 113 } 114 115 /* ------------------------------ */ 116 117 /* register OSS synth */ 118 void snd_opl3_init_seq_oss(struct snd_opl3 *opl3, char *name) 119 { 120 struct snd_seq_oss_reg *arg; 121 struct snd_seq_device *dev; 122 123 if (snd_seq_device_new(opl3->card, 0, SNDRV_SEQ_DEV_ID_OSS, 124 sizeof(struct snd_seq_oss_reg), &dev) < 0) 125 return; 126 127 opl3->oss_seq_dev = dev; 128 strlcpy(dev->name, name, sizeof(dev->name)); 129 arg = SNDRV_SEQ_DEVICE_ARGPTR(dev); 130 arg->type = SYNTH_TYPE_FM; 131 if (opl3->hardware < OPL3_HW_OPL3) { 132 arg->subtype = FM_TYPE_ADLIB; 133 arg->nvoices = MAX_OPL2_VOICES; 134 } else { 135 arg->subtype = FM_TYPE_OPL3; 136 arg->nvoices = MAX_OPL3_VOICES; 137 } 138 arg->oper = oss_callback; 139 arg->private_data = opl3; 140 141 if (snd_opl3_oss_create_port(opl3)) { 142 /* register to OSS synth table */ 143 snd_device_register(opl3->card, dev); 144 } 145 } 146 147 /* unregister */ 148 void snd_opl3_free_seq_oss(struct snd_opl3 *opl3) 149 { 150 if (opl3->oss_seq_dev) { 151 /* The instance should have been released in prior */ 152 opl3->oss_seq_dev = NULL; 153 } 154 } 155 156 /* ------------------------------ */ 157 158 /* open OSS sequencer */ 159 static int snd_opl3_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure) 160 { 161 struct snd_opl3 *opl3 = closure; 162 int err; 163 164 snd_assert(arg != NULL, return -ENXIO); 165 166 if ((err = snd_opl3_synth_setup(opl3)) < 0) 167 return err; 168 169 /* fill the argument data */ 170 arg->private_data = opl3; 171 arg->addr.client = opl3->oss_chset->client; 172 arg->addr.port = opl3->oss_chset->port; 173 174 if ((err = snd_opl3_synth_use_inc(opl3)) < 0) 175 return err; 176 177 opl3->synth_mode = SNDRV_OPL3_MODE_SYNTH; 178 return 0; 179 } 180 181 /* close OSS sequencer */ 182 static int snd_opl3_close_seq_oss(struct snd_seq_oss_arg *arg) 183 { 184 struct snd_opl3 *opl3; 185 186 snd_assert(arg != NULL, return -ENXIO); 187 opl3 = arg->private_data; 188 189 snd_opl3_synth_cleanup(opl3); 190 191 snd_opl3_synth_use_dec(opl3); 192 return 0; 193 } 194 195 /* load patch */ 196 197 /* offsets for SBI params */ 198 #define AM_VIB 0 199 #define KSL_LEVEL 2 200 #define ATTACK_DECAY 4 201 #define SUSTAIN_RELEASE 6 202 #define WAVE_SELECT 8 203 204 /* offset for SBI instrument */ 205 #define CONNECTION 10 206 #define OFFSET_4OP 11 207 208 /* from sound_config.h */ 209 #define SBFM_MAXINSTR 256 210 211 static int snd_opl3_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format, 212 const char __user *buf, int offs, int count) 213 { 214 struct snd_opl3 *opl3; 215 int err = -EINVAL; 216 217 snd_assert(arg != NULL, return -ENXIO); 218 opl3 = arg->private_data; 219 220 if ((format == FM_PATCH) || (format == OPL3_PATCH)) { 221 struct sbi_instrument sbi; 222 223 size_t size; 224 struct snd_seq_instr_header *put; 225 struct snd_seq_instr_data *data; 226 struct fm_xinstrument *xinstr; 227 228 struct snd_seq_event ev; 229 int i; 230 231 mm_segment_t fs; 232 233 if (count < (int)sizeof(sbi)) { 234 snd_printk("FM Error: Patch record too short\n"); 235 return -EINVAL; 236 } 237 if (copy_from_user(&sbi, buf, sizeof(sbi))) 238 return -EFAULT; 239 240 if (sbi.channel < 0 || sbi.channel >= SBFM_MAXINSTR) { 241 snd_printk("FM Error: Invalid instrument number %d\n", sbi.channel); 242 return -EINVAL; 243 } 244 245 size = sizeof(*put) + sizeof(struct fm_xinstrument); 246 put = kzalloc(size, GFP_KERNEL); 247 if (put == NULL) 248 return -ENOMEM; 249 /* build header */ 250 data = &put->data; 251 data->type = SNDRV_SEQ_INSTR_ATYPE_DATA; 252 strcpy(data->data.format, SNDRV_SEQ_INSTR_ID_OPL2_3); 253 /* build data section */ 254 xinstr = (struct fm_xinstrument *)(data + 1); 255 xinstr->stype = FM_STRU_INSTR; 256 257 for (i = 0; i < 2; i++) { 258 xinstr->op[i].am_vib = sbi.operators[AM_VIB + i]; 259 xinstr->op[i].ksl_level = sbi.operators[KSL_LEVEL + i]; 260 xinstr->op[i].attack_decay = sbi.operators[ATTACK_DECAY + i]; 261 xinstr->op[i].sustain_release = sbi.operators[SUSTAIN_RELEASE + i]; 262 xinstr->op[i].wave_select = sbi.operators[WAVE_SELECT + i]; 263 } 264 xinstr->feedback_connection[0] = sbi.operators[CONNECTION]; 265 266 if (format == OPL3_PATCH) { 267 xinstr->type = FM_PATCH_OPL3; 268 for (i = 0; i < 2; i++) { 269 xinstr->op[i+2].am_vib = sbi.operators[OFFSET_4OP + AM_VIB + i]; 270 xinstr->op[i+2].ksl_level = sbi.operators[OFFSET_4OP + KSL_LEVEL + i]; 271 xinstr->op[i+2].attack_decay = sbi.operators[OFFSET_4OP + ATTACK_DECAY + i]; 272 xinstr->op[i+2].sustain_release = sbi.operators[OFFSET_4OP + SUSTAIN_RELEASE + i]; 273 xinstr->op[i+2].wave_select = sbi.operators[OFFSET_4OP + WAVE_SELECT + i]; 274 } 275 xinstr->feedback_connection[1] = sbi.operators[OFFSET_4OP + CONNECTION]; 276 } else { 277 xinstr->type = FM_PATCH_OPL2; 278 } 279 280 put->id.instr.std = SNDRV_SEQ_INSTR_TYPE2_OPL2_3; 281 put->id.instr.bank = 127; 282 put->id.instr.prg = sbi.channel; 283 put->cmd = SNDRV_SEQ_INSTR_PUT_CMD_CREATE; 284 285 memset (&ev, 0, sizeof(ev)); 286 ev.source.client = SNDRV_SEQ_CLIENT_OSS; 287 ev.dest = arg->addr; 288 289 ev.flags = SNDRV_SEQ_EVENT_LENGTH_VARUSR; 290 ev.queue = SNDRV_SEQ_QUEUE_DIRECT; 291 292 fs = snd_enter_user(); 293 __again: 294 ev.type = SNDRV_SEQ_EVENT_INSTR_PUT; 295 ev.data.ext.len = size; 296 ev.data.ext.ptr = put; 297 298 err = snd_seq_instr_event(&opl3->fm_ops, opl3->ilist, &ev, 299 opl3->seq_client, 0, 0); 300 if (err == -EBUSY) { 301 struct snd_seq_instr_header remove; 302 303 memset (&remove, 0, sizeof(remove)); 304 remove.cmd = SNDRV_SEQ_INSTR_FREE_CMD_SINGLE; 305 remove.id.instr = put->id.instr; 306 307 /* remove instrument */ 308 ev.type = SNDRV_SEQ_EVENT_INSTR_FREE; 309 ev.data.ext.len = sizeof(remove); 310 ev.data.ext.ptr = &remove; 311 312 snd_seq_instr_event(&opl3->fm_ops, opl3->ilist, &ev, 313 opl3->seq_client, 0, 0); 314 goto __again; 315 } 316 snd_leave_user(fs); 317 318 kfree(put); 319 } 320 return err; 321 } 322 323 /* ioctl */ 324 static int snd_opl3_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd, 325 unsigned long ioarg) 326 { 327 struct snd_opl3 *opl3; 328 329 snd_assert(arg != NULL, return -ENXIO); 330 opl3 = arg->private_data; 331 switch (cmd) { 332 case SNDCTL_FM_LOAD_INSTR: 333 snd_printk("OPL3: Obsolete ioctl(SNDCTL_FM_LOAD_INSTR) used. Fix the program.\n"); 334 return -EINVAL; 335 336 case SNDCTL_SYNTH_MEMAVL: 337 return 0x7fffffff; 338 339 case SNDCTL_FM_4OP_ENABLE: 340 // handled automatically by OPL instrument type 341 return 0; 342 343 default: 344 return -EINVAL; 345 } 346 return 0; 347 } 348 349 /* reset device */ 350 static int snd_opl3_reset_seq_oss(struct snd_seq_oss_arg *arg) 351 { 352 struct snd_opl3 *opl3; 353 354 snd_assert(arg != NULL, return -ENXIO); 355 opl3 = arg->private_data; 356 357 return 0; 358 } 359