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 snd_midi_channel_free_set(opl3->oss_chset); 108 return opl3->oss_chset->port; 109 } 110 return 0; 111 } 112 113 /* ------------------------------ */ 114 115 /* register OSS synth */ 116 void snd_opl3_init_seq_oss(struct snd_opl3 *opl3, char *name) 117 { 118 struct snd_seq_oss_reg *arg; 119 struct snd_seq_device *dev; 120 121 if (snd_seq_device_new(opl3->card, 0, SNDRV_SEQ_DEV_ID_OSS, 122 sizeof(struct snd_seq_oss_reg), &dev) < 0) 123 return; 124 125 opl3->oss_seq_dev = dev; 126 strlcpy(dev->name, name, sizeof(dev->name)); 127 arg = SNDRV_SEQ_DEVICE_ARGPTR(dev); 128 arg->type = SYNTH_TYPE_FM; 129 if (opl3->hardware < OPL3_HW_OPL3) { 130 arg->subtype = FM_TYPE_ADLIB; 131 arg->nvoices = MAX_OPL2_VOICES; 132 } else { 133 arg->subtype = FM_TYPE_OPL3; 134 arg->nvoices = MAX_OPL3_VOICES; 135 } 136 arg->oper = oss_callback; 137 arg->private_data = opl3; 138 139 snd_opl3_oss_create_port(opl3); 140 141 /* register to OSS synth table */ 142 snd_device_register(opl3->card, dev); 143 } 144 145 /* unregister */ 146 void snd_opl3_free_seq_oss(struct snd_opl3 *opl3) 147 { 148 if (opl3->oss_seq_dev) { 149 snd_device_free(opl3->card, opl3->oss_seq_dev); 150 opl3->oss_seq_dev = NULL; 151 } 152 } 153 154 /* ------------------------------ */ 155 156 /* open OSS sequencer */ 157 static int snd_opl3_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure) 158 { 159 struct snd_opl3 *opl3 = closure; 160 int err; 161 162 snd_assert(arg != NULL, return -ENXIO); 163 164 if ((err = snd_opl3_synth_setup(opl3)) < 0) 165 return err; 166 167 /* fill the argument data */ 168 arg->private_data = opl3; 169 arg->addr.client = opl3->oss_chset->client; 170 arg->addr.port = opl3->oss_chset->port; 171 172 if ((err = snd_opl3_synth_use_inc(opl3)) < 0) 173 return err; 174 175 opl3->synth_mode = SNDRV_OPL3_MODE_SYNTH; 176 return 0; 177 } 178 179 /* close OSS sequencer */ 180 static int snd_opl3_close_seq_oss(struct snd_seq_oss_arg *arg) 181 { 182 struct snd_opl3 *opl3; 183 184 snd_assert(arg != NULL, return -ENXIO); 185 opl3 = arg->private_data; 186 187 snd_opl3_synth_cleanup(opl3); 188 189 snd_opl3_synth_use_dec(opl3); 190 return 0; 191 } 192 193 /* load patch */ 194 195 /* offsets for SBI params */ 196 #define AM_VIB 0 197 #define KSL_LEVEL 2 198 #define ATTACK_DECAY 4 199 #define SUSTAIN_RELEASE 6 200 #define WAVE_SELECT 8 201 202 /* offset for SBI instrument */ 203 #define CONNECTION 10 204 #define OFFSET_4OP 11 205 206 /* from sound_config.h */ 207 #define SBFM_MAXINSTR 256 208 209 static int snd_opl3_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format, 210 const char __user *buf, int offs, int count) 211 { 212 struct snd_opl3 *opl3; 213 int err = -EINVAL; 214 215 snd_assert(arg != NULL, return -ENXIO); 216 opl3 = arg->private_data; 217 218 if ((format == FM_PATCH) || (format == OPL3_PATCH)) { 219 struct sbi_instrument sbi; 220 221 size_t size; 222 struct snd_seq_instr_header *put; 223 struct snd_seq_instr_data *data; 224 struct fm_xinstrument *xinstr; 225 226 struct snd_seq_event ev; 227 int i; 228 229 mm_segment_t fs; 230 231 if (count < (int)sizeof(sbi)) { 232 snd_printk("FM Error: Patch record too short\n"); 233 return -EINVAL; 234 } 235 if (copy_from_user(&sbi, buf, sizeof(sbi))) 236 return -EFAULT; 237 238 if (sbi.channel < 0 || sbi.channel >= SBFM_MAXINSTR) { 239 snd_printk("FM Error: Invalid instrument number %d\n", sbi.channel); 240 return -EINVAL; 241 } 242 243 size = sizeof(*put) + sizeof(struct fm_xinstrument); 244 put = kzalloc(size, GFP_KERNEL); 245 if (put == NULL) 246 return -ENOMEM; 247 /* build header */ 248 data = &put->data; 249 data->type = SNDRV_SEQ_INSTR_ATYPE_DATA; 250 strcpy(data->data.format, SNDRV_SEQ_INSTR_ID_OPL2_3); 251 /* build data section */ 252 xinstr = (struct fm_xinstrument *)(data + 1); 253 xinstr->stype = FM_STRU_INSTR; 254 255 for (i = 0; i < 2; i++) { 256 xinstr->op[i].am_vib = sbi.operators[AM_VIB + i]; 257 xinstr->op[i].ksl_level = sbi.operators[KSL_LEVEL + i]; 258 xinstr->op[i].attack_decay = sbi.operators[ATTACK_DECAY + i]; 259 xinstr->op[i].sustain_release = sbi.operators[SUSTAIN_RELEASE + i]; 260 xinstr->op[i].wave_select = sbi.operators[WAVE_SELECT + i]; 261 } 262 xinstr->feedback_connection[0] = sbi.operators[CONNECTION]; 263 264 if (format == OPL3_PATCH) { 265 xinstr->type = FM_PATCH_OPL3; 266 for (i = 0; i < 2; i++) { 267 xinstr->op[i+2].am_vib = sbi.operators[OFFSET_4OP + AM_VIB + i]; 268 xinstr->op[i+2].ksl_level = sbi.operators[OFFSET_4OP + KSL_LEVEL + i]; 269 xinstr->op[i+2].attack_decay = sbi.operators[OFFSET_4OP + ATTACK_DECAY + i]; 270 xinstr->op[i+2].sustain_release = sbi.operators[OFFSET_4OP + SUSTAIN_RELEASE + i]; 271 xinstr->op[i+2].wave_select = sbi.operators[OFFSET_4OP + WAVE_SELECT + i]; 272 } 273 xinstr->feedback_connection[1] = sbi.operators[OFFSET_4OP + CONNECTION]; 274 } else { 275 xinstr->type = FM_PATCH_OPL2; 276 } 277 278 put->id.instr.std = SNDRV_SEQ_INSTR_TYPE2_OPL2_3; 279 put->id.instr.bank = 127; 280 put->id.instr.prg = sbi.channel; 281 put->cmd = SNDRV_SEQ_INSTR_PUT_CMD_CREATE; 282 283 memset (&ev, 0, sizeof(ev)); 284 ev.source.client = SNDRV_SEQ_CLIENT_OSS; 285 ev.dest = arg->addr; 286 287 ev.flags = SNDRV_SEQ_EVENT_LENGTH_VARUSR; 288 ev.queue = SNDRV_SEQ_QUEUE_DIRECT; 289 290 fs = snd_enter_user(); 291 __again: 292 ev.type = SNDRV_SEQ_EVENT_INSTR_PUT; 293 ev.data.ext.len = size; 294 ev.data.ext.ptr = put; 295 296 err = snd_seq_instr_event(&opl3->fm_ops, opl3->ilist, &ev, 297 opl3->seq_client, 0, 0); 298 if (err == -EBUSY) { 299 struct snd_seq_instr_header remove; 300 301 memset (&remove, 0, sizeof(remove)); 302 remove.cmd = SNDRV_SEQ_INSTR_FREE_CMD_SINGLE; 303 remove.id.instr = put->id.instr; 304 305 /* remove instrument */ 306 ev.type = SNDRV_SEQ_EVENT_INSTR_FREE; 307 ev.data.ext.len = sizeof(remove); 308 ev.data.ext.ptr = &remove; 309 310 snd_seq_instr_event(&opl3->fm_ops, opl3->ilist, &ev, 311 opl3->seq_client, 0, 0); 312 goto __again; 313 } 314 snd_leave_user(fs); 315 316 kfree(put); 317 } 318 return err; 319 } 320 321 /* ioctl */ 322 static int snd_opl3_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd, 323 unsigned long ioarg) 324 { 325 struct snd_opl3 *opl3; 326 327 snd_assert(arg != NULL, return -ENXIO); 328 opl3 = arg->private_data; 329 switch (cmd) { 330 case SNDCTL_FM_LOAD_INSTR: 331 snd_printk("OPL3: Obsolete ioctl(SNDCTL_FM_LOAD_INSTR) used. Fix the program.\n"); 332 return -EINVAL; 333 334 case SNDCTL_SYNTH_MEMAVL: 335 return 0x7fffffff; 336 337 case SNDCTL_FM_4OP_ENABLE: 338 // handled automatically by OPL instrument type 339 return 0; 340 341 default: 342 return -EINVAL; 343 } 344 return 0; 345 } 346 347 /* reset device */ 348 static int snd_opl3_reset_seq_oss(struct snd_seq_oss_arg *arg) 349 { 350 struct snd_opl3 *opl3; 351 352 snd_assert(arg != NULL, return -ENXIO); 353 opl3 = arg->private_data; 354 355 return 0; 356 } 357