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/moduleparam.h>
36 static int maxqlen = SNDRV_SEQ_OSS_MAX_QLEN;
37 module_param(maxqlen, int, 0444);
38 MODULE_PARM_DESC(maxqlen, "maximum queue length");
40 static int system_client = -1; /* ALSA sequencer client number */
41 static int system_port = -1;
43 static int num_clients;
44 static seq_oss_devinfo_t *client_table[SNDRV_SEQ_OSS_MAX_CLIENTS];
50 static int receive_announce(snd_seq_event_t *ev, int direct, void *private, int atomic, int hop);
51 static int translate_mode(struct file *file);
52 static int create_port(seq_oss_devinfo_t *dp);
53 static int delete_port(seq_oss_devinfo_t *dp);
54 static int alloc_seq_queue(seq_oss_devinfo_t *dp);
55 static int delete_seq_queue(int queue);
56 static void free_devinfo(void *private);
58 #define call_ctl(type,rec) snd_seq_kernel_client_ctl(system_client, type, rec)
62 * create sequencer client for OSS sequencer
65 snd_seq_oss_create_client(void)
68 snd_seq_client_callback_t callback;
69 snd_seq_client_info_t *info;
70 snd_seq_port_info_t *port;
71 snd_seq_port_callback_t port_callback;
73 info = kmalloc(sizeof(*info), GFP_KERNEL);
74 port = kmalloc(sizeof(*port), GFP_KERNEL);
80 /* create ALSA client */
81 memset(&callback, 0, sizeof(callback));
83 callback.private_data = NULL;
84 callback.allow_input = 1;
85 callback.allow_output = 1;
87 rc = snd_seq_create_kernel_client(NULL, SNDRV_SEQ_CLIENT_OSS, &callback);
92 debug_printk(("new client = %d\n", rc));
94 /* set client information */
95 memset(info, 0, sizeof(*info));
96 info->client = system_client;
97 info->type = KERNEL_CLIENT;
98 strcpy(info->name, "OSS sequencer");
100 rc = call_ctl(SNDRV_SEQ_IOCTL_SET_CLIENT_INFO, info);
102 /* look up midi devices */
103 snd_seq_oss_midi_lookup_ports(system_client);
105 /* create annoucement receiver port */
106 memset(port, 0, sizeof(*port));
107 strcpy(port->name, "Receiver");
108 port->addr.client = system_client;
109 port->capability = SNDRV_SEQ_PORT_CAP_WRITE; /* receive only */
112 memset(&port_callback, 0, sizeof(port_callback));
113 /* don't set port_callback.owner here. otherwise the module counter
114 * is incremented and we can no longer release the module..
116 port_callback.event_input = receive_announce;
117 port->kernel = &port_callback;
119 call_ctl(SNDRV_SEQ_IOCTL_CREATE_PORT, port);
120 if ((system_port = port->addr.port) >= 0) {
121 snd_seq_port_subscribe_t subs;
123 memset(&subs, 0, sizeof(subs));
124 subs.sender.client = SNDRV_SEQ_CLIENT_SYSTEM;
125 subs.sender.port = SNDRV_SEQ_PORT_SYSTEM_ANNOUNCE;
126 subs.dest.client = system_client;
127 subs.dest.port = system_port;
128 call_ctl(SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, &subs);
140 * receive annoucement from system port, and check the midi device
143 receive_announce(snd_seq_event_t *ev, int direct, void *private, int atomic, int hop)
145 snd_seq_port_info_t pinfo;
148 return 0; /* it must not happen */
151 case SNDRV_SEQ_EVENT_PORT_START:
152 case SNDRV_SEQ_EVENT_PORT_CHANGE:
153 if (ev->data.addr.client == system_client)
154 break; /* ignore myself */
155 memset(&pinfo, 0, sizeof(pinfo));
156 pinfo.addr = ev->data.addr;
157 if (call_ctl(SNDRV_SEQ_IOCTL_GET_PORT_INFO, &pinfo) >= 0)
158 snd_seq_oss_midi_check_new_port(&pinfo);
161 case SNDRV_SEQ_EVENT_PORT_EXIT:
162 if (ev->data.addr.client == system_client)
163 break; /* ignore myself */
164 snd_seq_oss_midi_check_exit_port(ev->data.addr.client,
173 * delete OSS sequencer client
176 snd_seq_oss_delete_client(void)
178 if (system_client >= 0)
179 snd_seq_delete_kernel_client(system_client);
181 snd_seq_oss_midi_clear_all();
188 * open sequencer device
191 snd_seq_oss_open(struct file *file, int level)
194 seq_oss_devinfo_t *dp;
196 if ((dp = kcalloc(1, sizeof(*dp), GFP_KERNEL)) == NULL) {
197 snd_printk(KERN_ERR "can't malloc device info\n");
200 debug_printk(("oss_open: dp = %p\n", dp));
202 for (i = 0; i < SNDRV_SEQ_OSS_MAX_CLIENTS; i++) {
203 if (client_table[i] == NULL)
206 if (i >= SNDRV_SEQ_OSS_MAX_CLIENTS) {
207 snd_printk(KERN_ERR "too many applications\n");
213 dp->cseq = system_client;
219 /* look up synth and midi devices */
220 snd_seq_oss_synth_setup(dp);
221 snd_seq_oss_midi_setup(dp);
223 if (dp->synth_opened == 0 && dp->max_mididev == 0) {
224 /* snd_printk(KERN_ERR "no device found\n"); */
230 debug_printk(("create new port\n"));
231 if ((rc = create_port(dp)) < 0) {
232 snd_printk(KERN_ERR "can't create port\n");
237 debug_printk(("allocate queue\n"));
238 if ((rc = alloc_seq_queue(dp)) < 0)
242 dp->addr.client = dp->cseq;
243 dp->addr.port = dp->port;
244 /*dp->addr.queue = dp->queue;*/
245 /*dp->addr.channel = 0;*/
247 dp->seq_mode = level;
249 /* set up file mode */
250 dp->file_mode = translate_mode(file);
252 /* initialize read queue */
253 debug_printk(("initialize read queue\n"));
254 if (is_read_mode(dp->file_mode)) {
255 if ((dp->readq = snd_seq_oss_readq_new(dp, maxqlen)) == NULL) {
261 /* initialize write queue */
262 debug_printk(("initialize write queue\n"));
263 if (is_write_mode(dp->file_mode)) {
264 dp->writeq = snd_seq_oss_writeq_new(dp, maxqlen);
265 if (dp->writeq == NULL) {
271 /* initialize timer */
272 debug_printk(("initialize timer\n"));
273 if ((dp->timer = snd_seq_oss_timer_new(dp)) == NULL) {
274 snd_printk(KERN_ERR "can't alloc timer\n");
278 debug_printk(("timer initialized\n"));
280 /* set private data pointer */
281 file->private_data = dp;
283 /* set up for mode2 */
284 if (level == SNDRV_SEQ_OSS_MODE_MUSIC)
285 snd_seq_oss_synth_setup_midi(dp);
286 else if (is_read_mode(dp->file_mode))
287 snd_seq_oss_midi_open_all(dp, SNDRV_SEQ_OSS_FILE_READ);
289 client_table[dp->index] = dp;
292 debug_printk(("open done\n"));
296 snd_seq_oss_synth_cleanup(dp);
297 snd_seq_oss_midi_cleanup(dp);
306 * translate file flags to private mode
309 translate_mode(struct file *file)
312 if ((file->f_flags & O_ACCMODE) != O_RDONLY)
313 file_mode |= SNDRV_SEQ_OSS_FILE_WRITE;
314 if ((file->f_flags & O_ACCMODE) != O_WRONLY)
315 file_mode |= SNDRV_SEQ_OSS_FILE_READ;
316 if (file->f_flags & O_NONBLOCK)
317 file_mode |= SNDRV_SEQ_OSS_FILE_NONBLOCK;
323 * create sequencer port
326 create_port(seq_oss_devinfo_t *dp)
329 snd_seq_port_info_t port;
330 snd_seq_port_callback_t callback;
332 memset(&port, 0, sizeof(port));
333 port.addr.client = dp->cseq;
334 sprintf(port.name, "Sequencer-%d", dp->index);
335 port.capability = SNDRV_SEQ_PORT_CAP_READ|SNDRV_SEQ_PORT_CAP_WRITE; /* no subscription */
336 port.type = SNDRV_SEQ_PORT_TYPE_SPECIFIC;
337 port.midi_channels = 128;
338 port.synth_voices = 128;
340 memset(&callback, 0, sizeof(callback));
341 callback.owner = THIS_MODULE;
342 callback.private_data = dp;
343 callback.event_input = snd_seq_oss_event_input;
344 callback.private_free = free_devinfo;
345 port.kernel = &callback;
347 rc = call_ctl(SNDRV_SEQ_IOCTL_CREATE_PORT, &port);
351 dp->port = port.addr.port;
352 debug_printk(("new port = %d\n", port.addr.port));
361 delete_port(seq_oss_devinfo_t *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(seq_oss_devinfo_t *dp)
376 snd_seq_queue_info_t 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 snd_seq_queue_info_t 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 seq_oss_devinfo_t *dp = (seq_oss_devinfo_t *)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(seq_oss_devinfo_t *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(seq_oss_devinfo_t *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(seq_oss_devinfo_t *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);
506 * misc. functions for proc interface
509 enabled_str(int bool)
511 return bool ? "enabled" : "disabled";
515 filemode_str(int val)
517 static char *str[] = {
518 "none", "read", "write", "read/write",
520 return str[val & SNDRV_SEQ_OSS_FILE_ACMODE];
528 snd_seq_oss_system_info_read(snd_info_buffer_t *buf)
531 seq_oss_devinfo_t *dp;
533 snd_iprintf(buf, "ALSA client number %d\n", system_client);
534 snd_iprintf(buf, "ALSA receiver port %d\n", system_port);
536 snd_iprintf(buf, "\nNumber of applications: %d\n", num_clients);
537 for (i = 0; i < num_clients; i++) {
538 snd_iprintf(buf, "\nApplication %d: ", i);
539 if ((dp = client_table[i]) == NULL) {
540 snd_iprintf(buf, "*empty*\n");
543 snd_iprintf(buf, "port %d : queue %d\n", dp->port, dp->queue);
544 snd_iprintf(buf, " sequencer mode = %s : file open mode = %s\n",
545 (dp->seq_mode ? "music" : "synth"),
546 filemode_str(dp->file_mode));
548 snd_iprintf(buf, " timer tempo = %d, timebase = %d\n",
549 dp->timer->oss_tempo, dp->timer->oss_timebase);
550 snd_iprintf(buf, " max queue length %d\n", maxqlen);
551 if (is_read_mode(dp->file_mode) && dp->readq)
552 snd_seq_oss_readq_info_read(dp->readq, buf);