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>
31 #include <linux/export.h>
32 #include <linux/moduleparam.h>
33 #include <linux/slab.h>
34 #include <linux/workqueue.h>
39 static int maxqlen = SNDRV_SEQ_OSS_MAX_QLEN;
40 module_param(maxqlen, int, 0444);
41 MODULE_PARM_DESC(maxqlen, "maximum queue length");
43 static int system_client = -1; /* ALSA sequencer client number */
44 static int system_port = -1;
46 static int num_clients;
47 static struct seq_oss_devinfo *client_table[SNDRV_SEQ_OSS_MAX_CLIENTS];
53 static int receive_announce(struct snd_seq_event *ev, int direct, void *private, int atomic, int hop);
54 static int translate_mode(struct file *file);
55 static int create_port(struct seq_oss_devinfo *dp);
56 static int delete_port(struct seq_oss_devinfo *dp);
57 static int alloc_seq_queue(struct seq_oss_devinfo *dp);
58 static int delete_seq_queue(int queue);
59 static void free_devinfo(void *private);
61 #define call_ctl(type,rec) snd_seq_kernel_client_ctl(system_client, type, rec)
64 /* call snd_seq_oss_midi_lookup_ports() asynchronously */
65 static void async_call_lookup_ports(struct work_struct *work)
67 snd_seq_oss_midi_lookup_ports(system_client);
70 static DECLARE_WORK(async_lookup_work, async_call_lookup_ports);
73 * create sequencer client for OSS sequencer
76 snd_seq_oss_create_client(void)
79 struct snd_seq_port_info *port;
80 struct snd_seq_port_callback port_callback;
82 port = kmalloc(sizeof(*port), GFP_KERNEL);
88 /* create ALSA client */
89 rc = snd_seq_create_kernel_client(NULL, SNDRV_SEQ_CLIENT_OSS,
95 debug_printk(("new client = %d\n", rc));
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 struct snd_seq_port_subscribe 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);
124 /* look up midi devices */
125 schedule_work(&async_lookup_work);
134 * receive annoucement from system port, and check the midi device
137 receive_announce(struct snd_seq_event *ev, int direct, void *private, int atomic, int hop)
139 struct snd_seq_port_info pinfo;
142 return 0; /* it must not happen */
145 case SNDRV_SEQ_EVENT_PORT_START:
146 case SNDRV_SEQ_EVENT_PORT_CHANGE:
147 if (ev->data.addr.client == system_client)
148 break; /* ignore myself */
149 memset(&pinfo, 0, sizeof(pinfo));
150 pinfo.addr = ev->data.addr;
151 if (call_ctl(SNDRV_SEQ_IOCTL_GET_PORT_INFO, &pinfo) >= 0)
152 snd_seq_oss_midi_check_new_port(&pinfo);
155 case SNDRV_SEQ_EVENT_PORT_EXIT:
156 if (ev->data.addr.client == system_client)
157 break; /* ignore myself */
158 snd_seq_oss_midi_check_exit_port(ev->data.addr.client,
167 * delete OSS sequencer client
170 snd_seq_oss_delete_client(void)
172 cancel_work_sync(&async_lookup_work);
173 if (system_client >= 0)
174 snd_seq_delete_kernel_client(system_client);
176 snd_seq_oss_midi_clear_all();
183 * open sequencer device
186 snd_seq_oss_open(struct file *file, int level)
189 struct seq_oss_devinfo *dp;
191 dp = kzalloc(sizeof(*dp), GFP_KERNEL);
193 snd_printk(KERN_ERR "can't malloc device info\n");
196 debug_printk(("oss_open: dp = %p\n", dp));
198 dp->cseq = system_client;
202 for (i = 0; i < SNDRV_SEQ_OSS_MAX_CLIENTS; i++) {
203 if (client_table[i] == NULL)
208 if (i >= SNDRV_SEQ_OSS_MAX_CLIENTS) {
209 snd_printk(KERN_ERR "too many applications\n");
214 /* look up synth and midi devices */
215 snd_seq_oss_synth_setup(dp);
216 snd_seq_oss_midi_setup(dp);
218 if (dp->synth_opened == 0 && dp->max_mididev == 0) {
219 /* snd_printk(KERN_ERR "no device found\n"); */
225 debug_printk(("create new port\n"));
226 rc = create_port(dp);
228 snd_printk(KERN_ERR "can't create port\n");
233 debug_printk(("allocate queue\n"));
234 rc = alloc_seq_queue(dp);
239 dp->addr.client = dp->cseq;
240 dp->addr.port = dp->port;
241 /*dp->addr.queue = dp->queue;*/
242 /*dp->addr.channel = 0;*/
244 dp->seq_mode = level;
246 /* set up file mode */
247 dp->file_mode = translate_mode(file);
249 /* initialize read queue */
250 debug_printk(("initialize read queue\n"));
251 if (is_read_mode(dp->file_mode)) {
252 dp->readq = snd_seq_oss_readq_new(dp, maxqlen);
259 /* initialize write queue */
260 debug_printk(("initialize write queue\n"));
261 if (is_write_mode(dp->file_mode)) {
262 dp->writeq = snd_seq_oss_writeq_new(dp, maxqlen);
269 /* initialize timer */
270 debug_printk(("initialize timer\n"));
271 dp->timer = snd_seq_oss_timer_new(dp);
273 snd_printk(KERN_ERR "can't alloc timer\n");
277 debug_printk(("timer initialized\n"));
279 /* set private data pointer */
280 file->private_data = dp;
282 /* set up for mode2 */
283 if (level == SNDRV_SEQ_OSS_MODE_MUSIC)
284 snd_seq_oss_synth_setup_midi(dp);
285 else if (is_read_mode(dp->file_mode))
286 snd_seq_oss_midi_open_all(dp, SNDRV_SEQ_OSS_FILE_READ);
288 client_table[dp->index] = dp;
291 debug_printk(("open done\n"));
295 snd_seq_oss_synth_cleanup(dp);
296 snd_seq_oss_midi_cleanup(dp);
297 delete_seq_queue(dp->queue);
304 * translate file flags to private mode
307 translate_mode(struct file *file)
310 if ((file->f_flags & O_ACCMODE) != O_RDONLY)
311 file_mode |= SNDRV_SEQ_OSS_FILE_WRITE;
312 if ((file->f_flags & O_ACCMODE) != O_WRONLY)
313 file_mode |= SNDRV_SEQ_OSS_FILE_READ;
314 if (file->f_flags & O_NONBLOCK)
315 file_mode |= SNDRV_SEQ_OSS_FILE_NONBLOCK;
321 * create sequencer port
324 create_port(struct seq_oss_devinfo *dp)
327 struct snd_seq_port_info port;
328 struct snd_seq_port_callback callback;
330 memset(&port, 0, sizeof(port));
331 port.addr.client = dp->cseq;
332 sprintf(port.name, "Sequencer-%d", dp->index);
333 port.capability = SNDRV_SEQ_PORT_CAP_READ|SNDRV_SEQ_PORT_CAP_WRITE; /* no subscription */
334 port.type = SNDRV_SEQ_PORT_TYPE_SPECIFIC;
335 port.midi_channels = 128;
336 port.synth_voices = 128;
338 memset(&callback, 0, sizeof(callback));
339 callback.owner = THIS_MODULE;
340 callback.private_data = dp;
341 callback.event_input = snd_seq_oss_event_input;
342 callback.private_free = free_devinfo;
343 port.kernel = &callback;
345 rc = call_ctl(SNDRV_SEQ_IOCTL_CREATE_PORT, &port);
349 dp->port = port.addr.port;
350 debug_printk(("new port = %d\n", port.addr.port));
359 delete_port(struct seq_oss_devinfo *dp)
366 debug_printk(("delete_port %i\n", dp->port));
367 return snd_seq_event_port_detach(dp->cseq, dp->port);
374 alloc_seq_queue(struct seq_oss_devinfo *dp)
376 struct snd_seq_queue_info qinfo;
379 memset(&qinfo, 0, sizeof(qinfo));
380 qinfo.owner = system_client;
382 strcpy(qinfo.name, "OSS Sequencer Emulation");
383 if ((rc = call_ctl(SNDRV_SEQ_IOCTL_CREATE_QUEUE, &qinfo)) < 0)
385 dp->queue = qinfo.queue;
393 delete_seq_queue(int queue)
395 struct snd_seq_queue_info qinfo;
400 memset(&qinfo, 0, sizeof(qinfo));
402 rc = call_ctl(SNDRV_SEQ_IOCTL_DELETE_QUEUE, &qinfo);
404 printk(KERN_ERR "seq-oss: unable to delete queue %d (%d)\n", queue, rc);
410 * free device informations - private_free callback of port
413 free_devinfo(void *private)
415 struct seq_oss_devinfo *dp = (struct seq_oss_devinfo *)private;
418 snd_seq_oss_timer_delete(dp->timer);
421 snd_seq_oss_writeq_delete(dp->writeq);
424 snd_seq_oss_readq_delete(dp->readq);
431 * close sequencer device
434 snd_seq_oss_release(struct seq_oss_devinfo *dp)
438 client_table[dp->index] = NULL;
441 debug_printk(("resetting..\n"));
442 snd_seq_oss_reset(dp);
444 debug_printk(("cleaning up..\n"));
445 snd_seq_oss_synth_cleanup(dp);
446 snd_seq_oss_midi_cleanup(dp);
449 debug_printk(("releasing resource..\n"));
453 delete_seq_queue(queue);
455 debug_printk(("release done\n"));
460 * Wait until the queue is empty (if we don't have nonblock)
463 snd_seq_oss_drain_write(struct seq_oss_devinfo *dp)
465 if (! dp->timer->running)
467 if (is_write_mode(dp->file_mode) && !is_nonblock_mode(dp->file_mode) &&
469 debug_printk(("syncing..\n"));
470 while (snd_seq_oss_writeq_sync(dp->writeq))
477 * reset sequencer devices
480 snd_seq_oss_reset(struct seq_oss_devinfo *dp)
484 /* reset all synth devices */
485 for (i = 0; i < dp->max_synthdev; i++)
486 snd_seq_oss_synth_reset(dp, i);
488 /* reset all midi devices */
489 if (dp->seq_mode != SNDRV_SEQ_OSS_MODE_MUSIC) {
490 for (i = 0; i < dp->max_mididev; i++)
491 snd_seq_oss_midi_reset(dp, i);
496 snd_seq_oss_readq_clear(dp->readq);
498 snd_seq_oss_writeq_clear(dp->writeq);
501 snd_seq_oss_timer_stop(dp->timer);
505 #ifdef CONFIG_PROC_FS
507 * misc. functions for proc interface
510 enabled_str(int bool)
512 return bool ? "enabled" : "disabled";
516 filemode_str(int val)
518 static char *str[] = {
519 "none", "read", "write", "read/write",
521 return str[val & SNDRV_SEQ_OSS_FILE_ACMODE];
529 snd_seq_oss_system_info_read(struct snd_info_buffer *buf)
532 struct seq_oss_devinfo *dp;
534 snd_iprintf(buf, "ALSA client number %d\n", system_client);
535 snd_iprintf(buf, "ALSA receiver port %d\n", system_port);
537 snd_iprintf(buf, "\nNumber of applications: %d\n", num_clients);
538 for (i = 0; i < num_clients; i++) {
539 snd_iprintf(buf, "\nApplication %d: ", i);
540 if ((dp = client_table[i]) == NULL) {
541 snd_iprintf(buf, "*empty*\n");
544 snd_iprintf(buf, "port %d : queue %d\n", dp->port, dp->queue);
545 snd_iprintf(buf, " sequencer mode = %s : file open mode = %s\n",
546 (dp->seq_mode ? "music" : "synth"),
547 filemode_str(dp->file_mode));
549 snd_iprintf(buf, " timer tempo = %d, timebase = %d\n",
550 dp->timer->oss_tempo, dp->timer->oss_timebase);
551 snd_iprintf(buf, " max queue length %d\n", maxqlen);
552 if (is_read_mode(dp->file_mode) && dp->readq)
553 snd_seq_oss_readq_info_read(dp->readq, buf);
556 #endif /* CONFIG_PROC_FS */