2 * OSS compatible sequencer driver
4 * open/close and reset interface
6 * Copyright (C) 1998-1999 Takashi Iwai <tiwai@suse.de>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include "seq_oss_device.h"
24 #include "seq_oss_synth.h"
25 #include "seq_oss_midi.h"
26 #include "seq_oss_writeq.h"
27 #include "seq_oss_readq.h"
28 #include "seq_oss_timer.h"
29 #include "seq_oss_event.h"
30 #include <linux/init.h>
35 MODULE_PARM(maxqlen, "i");
36 MODULE_PARM_DESC(maxqlen, "maximum queue length");
38 static int system_client = -1; /* ALSA sequencer client number */
39 static int system_port = -1;
41 int maxqlen = SNDRV_SEQ_OSS_MAX_QLEN;
42 static int num_clients;
43 static seq_oss_devinfo_t *client_table[SNDRV_SEQ_OSS_MAX_CLIENTS];
49 static int receive_announce(snd_seq_event_t *ev, int direct, void *private, int atomic, int hop);
50 static int translate_mode(struct file *file);
51 static int create_port(seq_oss_devinfo_t *dp);
52 static int delete_port(seq_oss_devinfo_t *dp);
53 static int alloc_seq_queue(seq_oss_devinfo_t *dp);
54 static int delete_seq_queue(int queue);
55 static void free_devinfo(void *private);
57 #define call_ctl(type,rec) snd_seq_kernel_client_ctl(system_client, type, rec)
61 * create sequencer client for OSS sequencer
64 snd_seq_oss_create_client(void)
67 snd_seq_client_callback_t callback;
68 snd_seq_client_info_t info;
69 snd_seq_port_info_t port;
70 snd_seq_port_callback_t port_callback;
72 /* create ALSA client */
73 memset(&callback, 0, sizeof(callback));
75 callback.private_data = NULL;
76 callback.allow_input = 1;
77 callback.allow_output = 1;
79 rc = snd_seq_create_kernel_client(NULL, SNDRV_SEQ_CLIENT_OSS, &callback);
84 debug_printk(("new client = %d\n", rc));
86 /* set client information */
87 memset(&info, 0, sizeof(info));
88 info.client = system_client;
89 info.type = KERNEL_CLIENT;
90 strcpy(info.name, "OSS sequencer");
92 rc = call_ctl(SNDRV_SEQ_IOCTL_SET_CLIENT_INFO, &info);
94 /* look up midi devices */
95 snd_seq_oss_midi_lookup_ports(system_client);
97 /* create annoucement receiver port */
98 memset(&port, 0, sizeof(port));
99 strcpy(port.name, "Receiver");
100 port.addr.client = system_client;
101 port.capability = SNDRV_SEQ_PORT_CAP_WRITE; /* receive only */
104 memset(&port_callback, 0, sizeof(port_callback));
105 /* don't set port_callback.owner here. otherwise the module counter
106 * is incremented and we can no longer release the module..
108 port_callback.event_input = receive_announce;
109 port.kernel = &port_callback;
111 call_ctl(SNDRV_SEQ_IOCTL_CREATE_PORT, &port);
112 if ((system_port = port.addr.port) >= 0) {
113 snd_seq_port_subscribe_t subs;
115 memset(&subs, 0, sizeof(subs));
116 subs.sender.client = SNDRV_SEQ_CLIENT_SYSTEM;
117 subs.sender.port = SNDRV_SEQ_PORT_SYSTEM_ANNOUNCE;
118 subs.dest.client = system_client;
119 subs.dest.port = system_port;
120 call_ctl(SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, &subs);
129 * receive annoucement from system port, and check the midi device
132 receive_announce(snd_seq_event_t *ev, int direct, void *private, int atomic, int hop)
134 snd_seq_port_info_t pinfo;
137 return 0; /* it must not happen */
140 case SNDRV_SEQ_EVENT_PORT_START:
141 case SNDRV_SEQ_EVENT_PORT_CHANGE:
142 if (ev->data.addr.client == system_client)
143 break; /* ignore myself */
144 memset(&pinfo, 0, sizeof(pinfo));
145 pinfo.addr = ev->data.addr;
146 if (call_ctl(SNDRV_SEQ_IOCTL_GET_PORT_INFO, &pinfo) >= 0)
147 snd_seq_oss_midi_check_new_port(&pinfo);
150 case SNDRV_SEQ_EVENT_PORT_EXIT:
151 if (ev->data.addr.client == system_client)
152 break; /* ignore myself */
153 snd_seq_oss_midi_check_exit_port(ev->data.addr.client,
162 * delete OSS sequencer client
165 snd_seq_oss_delete_client(void)
167 if (system_client >= 0)
168 snd_seq_delete_kernel_client(system_client);
170 snd_seq_oss_midi_clear_all();
177 * open sequencer device
180 snd_seq_oss_open(struct file *file, int level)
183 seq_oss_devinfo_t *dp;
185 if ((dp = snd_kcalloc(sizeof(*dp), GFP_KERNEL)) == NULL) {
186 snd_printk(KERN_ERR "can't malloc device info\n");
189 debug_printk(("oss_open: dp = %p\n", dp));
191 for (i = 0; i < SNDRV_SEQ_OSS_MAX_CLIENTS; i++) {
192 if (client_table[i] == NULL)
195 if (i >= SNDRV_SEQ_OSS_MAX_CLIENTS) {
196 snd_printk(KERN_ERR "too many applications\n");
202 dp->cseq = system_client;
208 /* look up synth and midi devices */
209 snd_seq_oss_synth_setup(dp);
210 snd_seq_oss_midi_setup(dp);
212 if (dp->synth_opened == 0 && dp->max_mididev == 0) {
213 snd_printk(KERN_ERR "no device found\n");
219 debug_printk(("create new port\n"));
220 if ((rc = create_port(dp)) < 0) {
221 snd_printk(KERN_ERR "can't create port\n");
226 debug_printk(("allocate queue\n"));
227 if ((rc = alloc_seq_queue(dp)) < 0)
231 dp->addr.client = dp->cseq;
232 dp->addr.port = dp->port;
233 /*dp->addr.queue = dp->queue;*/
234 /*dp->addr.channel = 0;*/
236 dp->seq_mode = level;
238 /* set up file mode */
239 dp->file_mode = translate_mode(file);
241 /* initialize read queue */
242 debug_printk(("initialize read queue\n"));
243 if (is_read_mode(dp->file_mode)) {
244 if ((dp->readq = snd_seq_oss_readq_new(dp, maxqlen)) == NULL) {
250 /* initialize write queue */
251 debug_printk(("initialize write queue\n"));
252 if (is_write_mode(dp->file_mode)) {
253 dp->writeq = snd_seq_oss_writeq_new(dp, maxqlen);
254 if (dp->writeq == NULL) {
260 /* initialize timer */
261 debug_printk(("initialize timer\n"));
262 if ((dp->timer = snd_seq_oss_timer_new(dp)) == NULL) {
263 snd_printk(KERN_ERR "can't alloc timer\n");
267 debug_printk(("timer initialized\n"));
269 /* set private data pointer */
270 file->private_data = dp;
272 /* set up for mode2 */
273 if (level == SNDRV_SEQ_OSS_MODE_MUSIC)
274 snd_seq_oss_synth_setup_midi(dp);
275 else if (is_read_mode(dp->file_mode))
276 snd_seq_oss_midi_open_all(dp, SNDRV_SEQ_OSS_FILE_READ);
278 client_table[dp->index] = dp;
281 debug_printk(("open done\n"));
285 snd_seq_oss_synth_cleanup(dp);
286 snd_seq_oss_midi_cleanup(dp);
295 * translate file flags to private mode
298 translate_mode(struct file *file)
301 if ((file->f_flags & O_ACCMODE) != O_RDONLY)
302 file_mode |= SNDRV_SEQ_OSS_FILE_WRITE;
303 if ((file->f_flags & O_ACCMODE) != O_WRONLY)
304 file_mode |= SNDRV_SEQ_OSS_FILE_READ;
305 if (file->f_flags & O_NONBLOCK)
306 file_mode |= SNDRV_SEQ_OSS_FILE_NONBLOCK;
312 * create sequencer port
315 create_port(seq_oss_devinfo_t *dp)
318 snd_seq_port_info_t port;
319 snd_seq_port_callback_t callback;
321 memset(&port, 0, sizeof(port));
322 port.addr.client = dp->cseq;
323 sprintf(port.name, "Sequencer-%d", dp->index);
324 port.capability = SNDRV_SEQ_PORT_CAP_READ|SNDRV_SEQ_PORT_CAP_WRITE; /* no subscription */
325 port.type = SNDRV_SEQ_PORT_TYPE_SPECIFIC;
326 port.midi_channels = 128;
327 port.synth_voices = 128;
329 memset(&callback, 0, sizeof(callback));
330 callback.owner = THIS_MODULE;
331 callback.private_data = dp;
332 callback.event_input = snd_seq_oss_event_input;
333 callback.private_free = free_devinfo;
334 port.kernel = &callback;
336 rc = call_ctl(SNDRV_SEQ_IOCTL_CREATE_PORT, &port);
340 dp->port = port.addr.port;
341 debug_printk(("new port = %d\n", port.addr.port));
350 delete_port(seq_oss_devinfo_t *dp)
355 debug_printk(("delete_port %i\n", dp->port));
356 return snd_seq_event_port_detach(dp->cseq, dp->port);
363 alloc_seq_queue(seq_oss_devinfo_t *dp)
365 snd_seq_queue_info_t qinfo;
368 memset(&qinfo, 0, sizeof(qinfo));
369 qinfo.owner = system_client;
371 strcpy(qinfo.name, "OSS Sequencer Emulation");
372 if ((rc = call_ctl(SNDRV_SEQ_IOCTL_CREATE_QUEUE, &qinfo)) < 0)
374 dp->queue = qinfo.queue;
382 delete_seq_queue(int queue)
384 snd_seq_queue_info_t qinfo;
389 memset(&qinfo, 0, sizeof(qinfo));
391 rc = call_ctl(SNDRV_SEQ_IOCTL_DELETE_QUEUE, &qinfo);
393 printk(KERN_ERR "seq-oss: unable to delete queue %d (%d)\n", queue, rc);
399 * free device informations - private_free callback of port
402 free_devinfo(void *private)
404 seq_oss_devinfo_t *dp = (seq_oss_devinfo_t *)private;
407 snd_seq_oss_timer_delete(dp->timer);
410 snd_seq_oss_writeq_delete(dp->writeq);
413 snd_seq_oss_readq_delete(dp->readq);
420 * close sequencer device
423 snd_seq_oss_release(seq_oss_devinfo_t *dp)
427 client_table[dp->index] = NULL;
430 debug_printk(("resetting..\n"));
431 snd_seq_oss_reset(dp);
433 debug_printk(("cleaning up..\n"));
434 snd_seq_oss_synth_cleanup(dp);
435 snd_seq_oss_midi_cleanup(dp);
438 debug_printk(("releasing resource..\n"));
442 delete_seq_queue(queue);
444 debug_printk(("release done\n"));
449 * Wait until the queue is empty (if we don't have nonblock)
452 snd_seq_oss_drain_write(seq_oss_devinfo_t *dp)
454 if (! dp->timer->running)
456 if (is_write_mode(dp->file_mode) && !is_nonblock_mode(dp->file_mode) &&
458 debug_printk(("syncing..\n"));
459 while (snd_seq_oss_writeq_sync(dp->writeq))
466 * reset sequencer devices
469 snd_seq_oss_reset(seq_oss_devinfo_t *dp)
473 /* reset all synth devices */
474 for (i = 0; i < dp->max_synthdev; i++)
475 snd_seq_oss_synth_reset(dp, i);
477 /* reset all midi devices */
478 if (dp->seq_mode != SNDRV_SEQ_OSS_MODE_MUSIC) {
479 for (i = 0; i < dp->max_mididev; i++)
480 snd_seq_oss_midi_reset(dp, i);
485 snd_seq_oss_readq_clear(dp->readq);
487 snd_seq_oss_writeq_clear(dp->writeq);
490 snd_seq_oss_timer_stop(dp->timer);
497 snd_seq_oss_system_info_read(snd_info_buffer_t *buf)
500 seq_oss_devinfo_t *dp;
502 snd_iprintf(buf, "ALSA client number %d\n", system_client);
503 snd_iprintf(buf, "ALSA receiver port %d\n", system_port);
505 snd_iprintf(buf, "\nNumber of applications: %d\n", num_clients);
506 for (i = 0; i < num_clients; i++) {
507 snd_iprintf(buf, "\nApplication %d: ", i);
508 if ((dp = client_table[i]) == NULL) {
509 snd_iprintf(buf, "*empty*\n");
512 snd_iprintf(buf, "port %d : queue %d\n", dp->port, dp->queue);
513 snd_iprintf(buf, " sequencer mode = %s : file open mode = %s\n",
514 (dp->seq_mode ? "music" : "synth"),
515 filemode_str(dp->file_mode));
517 snd_iprintf(buf, " timer tempo = %d, timebase = %d\n",
518 dp->timer->oss_tempo, dp->timer->oss_timebase);
519 snd_iprintf(buf, " max queue length %d\n", maxqlen);
520 if (is_read_mode(dp->file_mode) && dp->readq)
521 snd_seq_oss_readq_info_read(dp->readq, buf);
526 * misc. functions for proc interface
529 enabled_str(int bool)
531 return bool ? "enabled" : "disabled";
535 filemode_str(int val)
537 static char *str[] = {
538 "none", "read", "write", "read/write",
540 return str[val & SNDRV_SEQ_OSS_FILE_ACMODE];