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devres: kernel-doc and DocBook
[linux-2.6/kvm.git] / sound / drivers / opl3 / opl3_oss.c
blob5fd3a4c956261d562cb2c55ce1849ed32108c533
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_HARDWARE |
104 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER,
105 voices, voices,
106 name);
107 if (opl3->oss_chset->port < 0) {
108 int port;
109 port = opl3->oss_chset->port;
110 snd_midi_channel_free_set(opl3->oss_chset);
111 return port;
112 }
113 return 0;
114 }
115
116 /* ------------------------------ */
117
118 /* register OSS synth */
119 void snd_opl3_init_seq_oss(struct snd_opl3 *opl3, char *name)
120 {
121 struct snd_seq_oss_reg *arg;
122 struct snd_seq_device *dev;
123
124 if (snd_seq_device_new(opl3->card, 0, SNDRV_SEQ_DEV_ID_OSS,
125 sizeof(struct snd_seq_oss_reg), &dev) < 0)
126 return;
127
128 opl3->oss_seq_dev = dev;
129 strlcpy(dev->name, name, sizeof(dev->name));
130 arg = SNDRV_SEQ_DEVICE_ARGPTR(dev);
131 arg->type = SYNTH_TYPE_FM;
132 if (opl3->hardware < OPL3_HW_OPL3) {
133 arg->subtype = FM_TYPE_ADLIB;
134 arg->nvoices = MAX_OPL2_VOICES;
135 } else {
136 arg->subtype = FM_TYPE_OPL3;
137 arg->nvoices = MAX_OPL3_VOICES;
138 }
139 arg->oper = oss_callback;
140 arg->private_data = opl3;
141
142 if (snd_opl3_oss_create_port(opl3)) {
143 /* register to OSS synth table */
144 snd_device_register(opl3->card, dev);
145 }
146 }
147
148 /* unregister */
149 void snd_opl3_free_seq_oss(struct snd_opl3 *opl3)
150 {
151 if (opl3->oss_seq_dev) {
152 /* The instance should have been released in prior */
153 opl3->oss_seq_dev = NULL;
154 }
155 }
156
157 /* ------------------------------ */
158
159 /* open OSS sequencer */
160 static int snd_opl3_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure)
161 {
162 struct snd_opl3 *opl3 = closure;
163 int err;
164
165 snd_assert(arg != NULL, return -ENXIO);
166
167 if ((err = snd_opl3_synth_setup(opl3)) < 0)
168 return err;
169
170 /* fill the argument data */
171 arg->private_data = opl3;
172 arg->addr.client = opl3->oss_chset->client;
173 arg->addr.port = opl3->oss_chset->port;
174
175 if ((err = snd_opl3_synth_use_inc(opl3)) < 0)
176 return err;
177
178 opl3->synth_mode = SNDRV_OPL3_MODE_SYNTH;
179 return 0;
180 }
181
182 /* close OSS sequencer */
183 static int snd_opl3_close_seq_oss(struct snd_seq_oss_arg *arg)
184 {
185 struct snd_opl3 *opl3;
186
187 snd_assert(arg != NULL, return -ENXIO);
188 opl3 = arg->private_data;
189
190 snd_opl3_synth_cleanup(opl3);
191
192 snd_opl3_synth_use_dec(opl3);
193 return 0;
194 }
195
196 /* load patch */
197
198 /* offsets for SBI params */
199 #define AM_VIB 0
200 #define KSL_LEVEL 2
201 #define ATTACK_DECAY 4
202 #define SUSTAIN_RELEASE 6
203 #define WAVE_SELECT 8
204
205 /* offset for SBI instrument */
206 #define CONNECTION 10
207 #define OFFSET_4OP 11
208
209 /* from sound_config.h */
210 #define SBFM_MAXINSTR 256
211
212 static int snd_opl3_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format,
213 const char __user *buf, int offs, int count)
214 {
215 struct snd_opl3 *opl3;
216 int err = -EINVAL;
217
218 snd_assert(arg != NULL, return -ENXIO);
219 opl3 = arg->private_data;
220
221 if ((format == FM_PATCH) || (format == OPL3_PATCH)) {
222 struct sbi_instrument sbi;
223
224 size_t size;
225 struct snd_seq_instr_header *put;
226 struct snd_seq_instr_data *data;
227 struct fm_xinstrument *xinstr;
228
229 struct snd_seq_event ev;
230 int i;
231
232 mm_segment_t fs;
233
234 if (count < (int)sizeof(sbi)) {
235 snd_printk("FM Error: Patch record too short\n");
236 return -EINVAL;
237 }
238 if (copy_from_user(&sbi, buf, sizeof(sbi)))
239 return -EFAULT;
240
241 if (sbi.channel < 0 || sbi.channel >= SBFM_MAXINSTR) {
242 snd_printk("FM Error: Invalid instrument number %d\n", sbi.channel);
243 return -EINVAL;
244 }
245
246 size = sizeof(*put) + sizeof(struct fm_xinstrument);
247 put = kzalloc(size, GFP_KERNEL);
248 if (put == NULL)
249 return -ENOMEM;
250 /* build header */
251 data = &put->data;
252 data->type = SNDRV_SEQ_INSTR_ATYPE_DATA;
253 strcpy(data->data.format, SNDRV_SEQ_INSTR_ID_OPL2_3);
254 /* build data section */
255 xinstr = (struct fm_xinstrument *)(data + 1);
256 xinstr->stype = FM_STRU_INSTR;
257
258 for (i = 0; i < 2; i++) {
259 xinstr->op[i].am_vib = sbi.operators[AM_VIB + i];
260 xinstr->op[i].ksl_level = sbi.operators[KSL_LEVEL + i];
261 xinstr->op[i].attack_decay = sbi.operators[ATTACK_DECAY + i];
262 xinstr->op[i].sustain_release = sbi.operators[SUSTAIN_RELEASE + i];
263 xinstr->op[i].wave_select = sbi.operators[WAVE_SELECT + i];
264 }
265 xinstr->feedback_connection[0] = sbi.operators[CONNECTION];
266
267 if (format == OPL3_PATCH) {
268 xinstr->type = FM_PATCH_OPL3;
269 for (i = 0; i < 2; i++) {
270 xinstr->op[i+2].am_vib = sbi.operators[OFFSET_4OP + AM_VIB + i];
271 xinstr->op[i+2].ksl_level = sbi.operators[OFFSET_4OP + KSL_LEVEL + i];
272 xinstr->op[i+2].attack_decay = sbi.operators[OFFSET_4OP + ATTACK_DECAY + i];
273 xinstr->op[i+2].sustain_release = sbi.operators[OFFSET_4OP + SUSTAIN_RELEASE + i];
274 xinstr->op[i+2].wave_select = sbi.operators[OFFSET_4OP + WAVE_SELECT + i];
275 }
276 xinstr->feedback_connection[1] = sbi.operators[OFFSET_4OP + CONNECTION];
277 } else {
278 xinstr->type = FM_PATCH_OPL2;
279 }
280
281 put->id.instr.std = SNDRV_SEQ_INSTR_TYPE2_OPL2_3;
282 put->id.instr.bank = 127;
283 put->id.instr.prg = sbi.channel;
284 put->cmd = SNDRV_SEQ_INSTR_PUT_CMD_CREATE;
285
286 memset (&ev, 0, sizeof(ev));
287 ev.source.client = SNDRV_SEQ_CLIENT_OSS;
288 ev.dest = arg->addr;
289
290 ev.flags = SNDRV_SEQ_EVENT_LENGTH_VARUSR;
291 ev.queue = SNDRV_SEQ_QUEUE_DIRECT;
292
293 fs = snd_enter_user();
294 __again:
295 ev.type = SNDRV_SEQ_EVENT_INSTR_PUT;
296 ev.data.ext.len = size;
297 ev.data.ext.ptr = put;
298
299 err = snd_seq_instr_event(&opl3->fm_ops, opl3->ilist, &ev,
300 opl3->seq_client, 0, 0);
301 if (err == -EBUSY) {
302 struct snd_seq_instr_header remove;
303
304 memset (&remove, 0, sizeof(remove));
305 remove.cmd = SNDRV_SEQ_INSTR_FREE_CMD_SINGLE;
306 remove.id.instr = put->id.instr;
307
308 /* remove instrument */
309 ev.type = SNDRV_SEQ_EVENT_INSTR_FREE;
310 ev.data.ext.len = sizeof(remove);
311 ev.data.ext.ptr = &remove;
312
313 snd_seq_instr_event(&opl3->fm_ops, opl3->ilist, &ev,
314 opl3->seq_client, 0, 0);
315 goto __again;
316 }
317 snd_leave_user(fs);
318
319 kfree(put);
320 }
321 return err;
322 }
323
324 /* ioctl */
325 static int snd_opl3_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd,
326 unsigned long ioarg)
327 {
328 struct snd_opl3 *opl3;
329
330 snd_assert(arg != NULL, return -ENXIO);
331 opl3 = arg->private_data;
332 switch (cmd) {
333 case SNDCTL_FM_LOAD_INSTR:
334 snd_printk("OPL3: Obsolete ioctl(SNDCTL_FM_LOAD_INSTR) used. Fix the program.\n");
335 return -EINVAL;
336
337 case SNDCTL_SYNTH_MEMAVL:
338 return 0x7fffffff;
339
340 case SNDCTL_FM_4OP_ENABLE:
341 // handled automatically by OPL instrument type
342 return 0;
343
344 default:
345 return -EINVAL;
346 }
347 return 0;
348 }
349
350 /* reset device */
351 static int snd_opl3_reset_seq_oss(struct snd_seq_oss_arg *arg)
352 {
353 struct snd_opl3 *opl3;
354
355 snd_assert(arg != NULL, return -ENXIO);
356 opl3 = arg->private_data;
357
358 return 0;
359 }
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