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(snd_seq_oss_arg_t *arg, void *closure);
25 static int snd_opl3_close_seq_oss(snd_seq_oss_arg_t *arg);
26 static int snd_opl3_ioctl_seq_oss(snd_seq_oss_arg_t *arg, unsigned int cmd, unsigned long ioarg);
27 static int snd_opl3_load_patch_seq_oss(snd_seq_oss_arg_t *arg, int format, const char __user *buf, int offs, int count);
28 static int snd_opl3_reset_seq_oss(snd_seq_oss_arg_t *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 snd_midi_op_t opl3_ops;
47
48 static snd_seq_oss_callback_t 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(snd_seq_event_t *ev, int direct,
58 void *private_data, int atomic, int hop)
59 {
60 opl3_t *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 opl3_t *opl3 = private_data;
72
73 snd_midi_channel_free_set(opl3->oss_chset);
74 }
75
76 static int snd_opl3_oss_create_port(opl3_t * opl3)
77 {
78 snd_seq_port_callback_t 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(opl3_t *opl3, char *name)
117 {
118 snd_seq_oss_reg_t *arg;
119 snd_seq_device_t *dev;
120
121 if (snd_seq_device_new(opl3->card, 0, SNDRV_SEQ_DEV_ID_OSS,
122 sizeof(snd_seq_oss_reg_t), &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(opl3_t *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(snd_seq_oss_arg_t *arg, void *closure)
158 {
159 opl3_t *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(snd_seq_oss_arg_t *arg)
181 {
182 opl3_t *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(snd_seq_oss_arg_t *arg, int format,
210 const char __user *buf, int offs, int count)
211 {
212 opl3_t *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 snd_seq_instr_header_t *put;
223 snd_seq_instr_data_t *data;
224 fm_xinstrument_t *xinstr;
225
226 snd_seq_event_t 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(fm_xinstrument_t);
244 put = kcalloc(1, 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 = (fm_xinstrument_t *)(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 snd_seq_instr_header_t 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(snd_seq_oss_arg_t *arg, unsigned int cmd,
323 unsigned long ioarg)
324 {
325 opl3_t *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(snd_seq_oss_arg_t *arg)
349 {
350 opl3_t *opl3;
351
352 snd_assert(arg != NULL, return -ENXIO);
353 opl3 = arg->private_data;
354
355 return 0;
356 }
357
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