11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Generic MIDI synth driver for ALSA sequencer 31da177e4SLinus Torvalds * Copyright (c) 1998 by Frank van de Pol <fvdpol@coil.demon.nl> 41da177e4SLinus Torvalds * Jaroslav Kysela <perex@suse.cz> 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or modify 71da177e4SLinus Torvalds * it under the terms of the GNU General Public License as published by 81da177e4SLinus Torvalds * the Free Software Foundation; either version 2 of the License, or 91da177e4SLinus Torvalds * (at your option) any later version. 101da177e4SLinus Torvalds * 111da177e4SLinus Torvalds * This program is distributed in the hope that it will be useful, 121da177e4SLinus Torvalds * but WITHOUT ANY WARRANTY; without even the implied warranty of 131da177e4SLinus Torvalds * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 141da177e4SLinus Torvalds * GNU General Public License for more details. 151da177e4SLinus Torvalds * 161da177e4SLinus Torvalds * You should have received a copy of the GNU General Public License 171da177e4SLinus Torvalds * along with this program; if not, write to the Free Software 181da177e4SLinus Torvalds * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 191da177e4SLinus Torvalds * 201da177e4SLinus Torvalds */ 211da177e4SLinus Torvalds 221da177e4SLinus Torvalds /* 231da177e4SLinus Torvalds Possible options for midisynth module: 241da177e4SLinus Torvalds - automatic opening of midi ports on first received event or subscription 251da177e4SLinus Torvalds (close will be performed when client leaves) 261da177e4SLinus Torvalds */ 271da177e4SLinus Torvalds 281da177e4SLinus Torvalds 291da177e4SLinus Torvalds #include <sound/driver.h> 301da177e4SLinus Torvalds #include <linux/init.h> 311da177e4SLinus Torvalds #include <linux/slab.h> 321da177e4SLinus Torvalds #include <linux/errno.h> 331da177e4SLinus Torvalds #include <linux/string.h> 341da177e4SLinus Torvalds #include <linux/moduleparam.h> 351da177e4SLinus Torvalds #include <asm/semaphore.h> 361da177e4SLinus Torvalds #include <sound/core.h> 371da177e4SLinus Torvalds #include <sound/rawmidi.h> 381da177e4SLinus Torvalds #include <sound/seq_kernel.h> 391da177e4SLinus Torvalds #include <sound/seq_device.h> 401da177e4SLinus Torvalds #include <sound/seq_midi_event.h> 411da177e4SLinus Torvalds #include <sound/initval.h> 421da177e4SLinus Torvalds 431da177e4SLinus Torvalds MODULE_AUTHOR("Frank van de Pol <fvdpol@coil.demon.nl>, Jaroslav Kysela <perex@suse.cz>"); 441da177e4SLinus Torvalds MODULE_DESCRIPTION("Advanced Linux Sound Architecture sequencer MIDI synth."); 451da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 461da177e4SLinus Torvalds static int output_buffer_size = PAGE_SIZE; 471da177e4SLinus Torvalds module_param(output_buffer_size, int, 0644); 481da177e4SLinus Torvalds MODULE_PARM_DESC(output_buffer_size, "Output buffer size in bytes."); 491da177e4SLinus Torvalds static int input_buffer_size = PAGE_SIZE; 501da177e4SLinus Torvalds module_param(input_buffer_size, int, 0644); 511da177e4SLinus Torvalds MODULE_PARM_DESC(input_buffer_size, "Input buffer size in bytes."); 521da177e4SLinus Torvalds 531da177e4SLinus Torvalds /* data for this midi synth driver */ 541da177e4SLinus Torvalds typedef struct { 551da177e4SLinus Torvalds snd_card_t *card; 561da177e4SLinus Torvalds int device; 571da177e4SLinus Torvalds int subdevice; 581da177e4SLinus Torvalds snd_rawmidi_file_t input_rfile; 591da177e4SLinus Torvalds snd_rawmidi_file_t output_rfile; 601da177e4SLinus Torvalds int seq_client; 611da177e4SLinus Torvalds int seq_port; 621da177e4SLinus Torvalds snd_midi_event_t *parser; 631da177e4SLinus Torvalds } seq_midisynth_t; 641da177e4SLinus Torvalds 651da177e4SLinus Torvalds typedef struct { 661da177e4SLinus Torvalds int seq_client; 671da177e4SLinus Torvalds int num_ports; 681da177e4SLinus Torvalds int ports_per_device[SNDRV_RAWMIDI_DEVICES]; 691da177e4SLinus Torvalds seq_midisynth_t *ports[SNDRV_RAWMIDI_DEVICES]; 701da177e4SLinus Torvalds } seq_midisynth_client_t; 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds static seq_midisynth_client_t *synths[SNDRV_CARDS]; 731da177e4SLinus Torvalds static DECLARE_MUTEX(register_mutex); 741da177e4SLinus Torvalds 751da177e4SLinus Torvalds /* handle rawmidi input event (MIDI v1.0 stream) */ 761da177e4SLinus Torvalds static void snd_midi_input_event(snd_rawmidi_substream_t * substream) 771da177e4SLinus Torvalds { 781da177e4SLinus Torvalds snd_rawmidi_runtime_t *runtime; 791da177e4SLinus Torvalds seq_midisynth_t *msynth; 801da177e4SLinus Torvalds snd_seq_event_t ev; 811da177e4SLinus Torvalds char buf[16], *pbuf; 821da177e4SLinus Torvalds long res, count; 831da177e4SLinus Torvalds 841da177e4SLinus Torvalds if (substream == NULL) 851da177e4SLinus Torvalds return; 861da177e4SLinus Torvalds runtime = substream->runtime; 871da177e4SLinus Torvalds msynth = (seq_midisynth_t *) runtime->private_data; 881da177e4SLinus Torvalds if (msynth == NULL) 891da177e4SLinus Torvalds return; 901da177e4SLinus Torvalds memset(&ev, 0, sizeof(ev)); 911da177e4SLinus Torvalds while (runtime->avail > 0) { 921da177e4SLinus Torvalds res = snd_rawmidi_kernel_read(substream, buf, sizeof(buf)); 931da177e4SLinus Torvalds if (res <= 0) 941da177e4SLinus Torvalds continue; 951da177e4SLinus Torvalds if (msynth->parser == NULL) 961da177e4SLinus Torvalds continue; 971da177e4SLinus Torvalds pbuf = buf; 981da177e4SLinus Torvalds while (res > 0) { 991da177e4SLinus Torvalds count = snd_midi_event_encode(msynth->parser, pbuf, res, &ev); 1001da177e4SLinus Torvalds if (count < 0) 1011da177e4SLinus Torvalds break; 1021da177e4SLinus Torvalds pbuf += count; 1031da177e4SLinus Torvalds res -= count; 1041da177e4SLinus Torvalds if (ev.type != SNDRV_SEQ_EVENT_NONE) { 1051da177e4SLinus Torvalds ev.source.port = msynth->seq_port; 1061da177e4SLinus Torvalds ev.dest.client = SNDRV_SEQ_ADDRESS_SUBSCRIBERS; 1071da177e4SLinus Torvalds snd_seq_kernel_client_dispatch(msynth->seq_client, &ev, 1, 0); 1081da177e4SLinus Torvalds /* clear event and reset header */ 1091da177e4SLinus Torvalds memset(&ev, 0, sizeof(ev)); 1101da177e4SLinus Torvalds } 1111da177e4SLinus Torvalds } 1121da177e4SLinus Torvalds } 1131da177e4SLinus Torvalds } 1141da177e4SLinus Torvalds 1151da177e4SLinus Torvalds static int dump_midi(snd_rawmidi_substream_t *substream, const char *buf, int count) 1161da177e4SLinus Torvalds { 1171da177e4SLinus Torvalds snd_rawmidi_runtime_t *runtime; 1181da177e4SLinus Torvalds int tmp; 1191da177e4SLinus Torvalds 1201da177e4SLinus Torvalds snd_assert(substream != NULL || buf != NULL, return -EINVAL); 1211da177e4SLinus Torvalds runtime = substream->runtime; 1221da177e4SLinus Torvalds if ((tmp = runtime->avail) < count) { 1231da177e4SLinus Torvalds snd_printd("warning, output event was lost (count = %i, available = %i)\n", count, tmp); 1241da177e4SLinus Torvalds return -ENOMEM; 1251da177e4SLinus Torvalds } 1261da177e4SLinus Torvalds if (snd_rawmidi_kernel_write(substream, buf, count) < count) 1271da177e4SLinus Torvalds return -EINVAL; 1281da177e4SLinus Torvalds return 0; 1291da177e4SLinus Torvalds } 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds static int event_process_midi(snd_seq_event_t * ev, int direct, 1321da177e4SLinus Torvalds void *private_data, int atomic, int hop) 1331da177e4SLinus Torvalds { 1341da177e4SLinus Torvalds seq_midisynth_t *msynth = (seq_midisynth_t *) private_data; 1351da177e4SLinus Torvalds unsigned char msg[10]; /* buffer for constructing midi messages */ 1361da177e4SLinus Torvalds snd_rawmidi_substream_t *substream; 137d06e4c40SClemens Ladisch int len; 1381da177e4SLinus Torvalds 1391da177e4SLinus Torvalds snd_assert(msynth != NULL, return -EINVAL); 1401da177e4SLinus Torvalds substream = msynth->output_rfile.output; 1411da177e4SLinus Torvalds if (substream == NULL) 1421da177e4SLinus Torvalds return -ENODEV; 1431da177e4SLinus Torvalds if (ev->type == SNDRV_SEQ_EVENT_SYSEX) { /* special case, to save space */ 1441da177e4SLinus Torvalds if ((ev->flags & SNDRV_SEQ_EVENT_LENGTH_MASK) != SNDRV_SEQ_EVENT_LENGTH_VARIABLE) { 1451da177e4SLinus Torvalds /* invalid event */ 1461da177e4SLinus Torvalds snd_printd("seq_midi: invalid sysex event flags = 0x%x\n", ev->flags); 1471da177e4SLinus Torvalds return 0; 1481da177e4SLinus Torvalds } 149d06e4c40SClemens Ladisch snd_seq_dump_var_event(ev, (snd_seq_dump_func_t)dump_midi, substream); 1501da177e4SLinus Torvalds snd_midi_event_reset_decode(msynth->parser); 1511da177e4SLinus Torvalds } else { 1521da177e4SLinus Torvalds if (msynth->parser == NULL) 1531da177e4SLinus Torvalds return -EIO; 154d06e4c40SClemens Ladisch len = snd_midi_event_decode(msynth->parser, msg, sizeof(msg), ev); 155d06e4c40SClemens Ladisch if (len < 0) 156d06e4c40SClemens Ladisch return 0; 157d06e4c40SClemens Ladisch if (dump_midi(substream, msg, len) < 0) 1581da177e4SLinus Torvalds snd_midi_event_reset_decode(msynth->parser); 1591da177e4SLinus Torvalds } 1601da177e4SLinus Torvalds return 0; 1611da177e4SLinus Torvalds } 1621da177e4SLinus Torvalds 1631da177e4SLinus Torvalds 1641da177e4SLinus Torvalds static int snd_seq_midisynth_new(seq_midisynth_t *msynth, 1651da177e4SLinus Torvalds snd_card_t *card, 1661da177e4SLinus Torvalds int device, 1671da177e4SLinus Torvalds int subdevice) 1681da177e4SLinus Torvalds { 1691da177e4SLinus Torvalds if (snd_midi_event_new(MAX_MIDI_EVENT_BUF, &msynth->parser) < 0) 1701da177e4SLinus Torvalds return -ENOMEM; 1711da177e4SLinus Torvalds msynth->card = card; 1721da177e4SLinus Torvalds msynth->device = device; 1731da177e4SLinus Torvalds msynth->subdevice = subdevice; 1741da177e4SLinus Torvalds return 0; 1751da177e4SLinus Torvalds } 1761da177e4SLinus Torvalds 1771da177e4SLinus Torvalds /* open associated midi device for input */ 1781da177e4SLinus Torvalds static int midisynth_subscribe(void *private_data, snd_seq_port_subscribe_t *info) 1791da177e4SLinus Torvalds { 1801da177e4SLinus Torvalds int err; 1811da177e4SLinus Torvalds seq_midisynth_t *msynth = (seq_midisynth_t *)private_data; 1821da177e4SLinus Torvalds snd_rawmidi_runtime_t *runtime; 1831da177e4SLinus Torvalds snd_rawmidi_params_t params; 1841da177e4SLinus Torvalds 1851da177e4SLinus Torvalds /* open midi port */ 1861da177e4SLinus Torvalds if ((err = snd_rawmidi_kernel_open(msynth->card->number, msynth->device, msynth->subdevice, SNDRV_RAWMIDI_LFLG_INPUT, &msynth->input_rfile)) < 0) { 1871da177e4SLinus Torvalds snd_printd("midi input open failed!!!\n"); 1881da177e4SLinus Torvalds return err; 1891da177e4SLinus Torvalds } 1901da177e4SLinus Torvalds runtime = msynth->input_rfile.input->runtime; 1911da177e4SLinus Torvalds memset(¶ms, 0, sizeof(params)); 1921da177e4SLinus Torvalds params.avail_min = 1; 1931da177e4SLinus Torvalds params.buffer_size = input_buffer_size; 1941da177e4SLinus Torvalds if ((err = snd_rawmidi_input_params(msynth->input_rfile.input, ¶ms)) < 0) { 1951da177e4SLinus Torvalds snd_rawmidi_kernel_release(&msynth->input_rfile); 1961da177e4SLinus Torvalds return err; 1971da177e4SLinus Torvalds } 1981da177e4SLinus Torvalds snd_midi_event_reset_encode(msynth->parser); 1991da177e4SLinus Torvalds runtime->event = snd_midi_input_event; 2001da177e4SLinus Torvalds runtime->private_data = msynth; 2011da177e4SLinus Torvalds snd_rawmidi_kernel_read(msynth->input_rfile.input, NULL, 0); 2021da177e4SLinus Torvalds return 0; 2031da177e4SLinus Torvalds } 2041da177e4SLinus Torvalds 2051da177e4SLinus Torvalds /* close associated midi device for input */ 2061da177e4SLinus Torvalds static int midisynth_unsubscribe(void *private_data, snd_seq_port_subscribe_t *info) 2071da177e4SLinus Torvalds { 2081da177e4SLinus Torvalds int err; 2091da177e4SLinus Torvalds seq_midisynth_t *msynth = (seq_midisynth_t *)private_data; 2101da177e4SLinus Torvalds 2111da177e4SLinus Torvalds snd_assert(msynth->input_rfile.input != NULL, return -EINVAL); 2121da177e4SLinus Torvalds err = snd_rawmidi_kernel_release(&msynth->input_rfile); 2131da177e4SLinus Torvalds return err; 2141da177e4SLinus Torvalds } 2151da177e4SLinus Torvalds 2161da177e4SLinus Torvalds /* open associated midi device for output */ 2171da177e4SLinus Torvalds static int midisynth_use(void *private_data, snd_seq_port_subscribe_t *info) 2181da177e4SLinus Torvalds { 2191da177e4SLinus Torvalds int err; 2201da177e4SLinus Torvalds seq_midisynth_t *msynth = (seq_midisynth_t *)private_data; 2211da177e4SLinus Torvalds snd_rawmidi_params_t params; 2221da177e4SLinus Torvalds 2231da177e4SLinus Torvalds /* open midi port */ 2241da177e4SLinus Torvalds if ((err = snd_rawmidi_kernel_open(msynth->card->number, msynth->device, msynth->subdevice, SNDRV_RAWMIDI_LFLG_OUTPUT, &msynth->output_rfile)) < 0) { 2251da177e4SLinus Torvalds snd_printd("midi output open failed!!!\n"); 2261da177e4SLinus Torvalds return err; 2271da177e4SLinus Torvalds } 2281da177e4SLinus Torvalds memset(¶ms, 0, sizeof(params)); 2291da177e4SLinus Torvalds params.avail_min = 1; 2301da177e4SLinus Torvalds params.buffer_size = output_buffer_size; 2311da177e4SLinus Torvalds if ((err = snd_rawmidi_output_params(msynth->output_rfile.output, ¶ms)) < 0) { 2321da177e4SLinus Torvalds snd_rawmidi_kernel_release(&msynth->output_rfile); 2331da177e4SLinus Torvalds return err; 2341da177e4SLinus Torvalds } 2351da177e4SLinus Torvalds snd_midi_event_reset_decode(msynth->parser); 2361da177e4SLinus Torvalds return 0; 2371da177e4SLinus Torvalds } 2381da177e4SLinus Torvalds 2391da177e4SLinus Torvalds /* close associated midi device for output */ 2401da177e4SLinus Torvalds static int midisynth_unuse(void *private_data, snd_seq_port_subscribe_t *info) 2411da177e4SLinus Torvalds { 2421da177e4SLinus Torvalds seq_midisynth_t *msynth = (seq_midisynth_t *)private_data; 2431da177e4SLinus Torvalds unsigned char buf = 0xff; /* MIDI reset */ 2441da177e4SLinus Torvalds 2451da177e4SLinus Torvalds snd_assert(msynth->output_rfile.output != NULL, return -EINVAL); 2461da177e4SLinus Torvalds /* sending single MIDI reset message to shut the device up */ 2471da177e4SLinus Torvalds snd_rawmidi_kernel_write(msynth->output_rfile.output, &buf, 1); 2481da177e4SLinus Torvalds snd_rawmidi_drain_output(msynth->output_rfile.output); 2491da177e4SLinus Torvalds return snd_rawmidi_kernel_release(&msynth->output_rfile); 2501da177e4SLinus Torvalds } 2511da177e4SLinus Torvalds 2521da177e4SLinus Torvalds /* delete given midi synth port */ 2531da177e4SLinus Torvalds static void snd_seq_midisynth_delete(seq_midisynth_t *msynth) 2541da177e4SLinus Torvalds { 2551da177e4SLinus Torvalds if (msynth == NULL) 2561da177e4SLinus Torvalds return; 2571da177e4SLinus Torvalds 2581da177e4SLinus Torvalds if (msynth->seq_client > 0) { 2591da177e4SLinus Torvalds /* delete port */ 2601da177e4SLinus Torvalds snd_seq_event_port_detach(msynth->seq_client, msynth->seq_port); 2611da177e4SLinus Torvalds } 2621da177e4SLinus Torvalds 2631da177e4SLinus Torvalds if (msynth->parser) 2641da177e4SLinus Torvalds snd_midi_event_free(msynth->parser); 2651da177e4SLinus Torvalds } 2661da177e4SLinus Torvalds 2671da177e4SLinus Torvalds /* set our client name */ 2681da177e4SLinus Torvalds static int set_client_name(seq_midisynth_client_t *client, snd_card_t *card, 2691da177e4SLinus Torvalds snd_rawmidi_info_t *rmidi) 2701da177e4SLinus Torvalds { 2711da177e4SLinus Torvalds snd_seq_client_info_t cinfo; 2721da177e4SLinus Torvalds const char *name; 2731da177e4SLinus Torvalds 2741da177e4SLinus Torvalds memset(&cinfo, 0, sizeof(cinfo)); 2751da177e4SLinus Torvalds cinfo.client = client->seq_client; 2761da177e4SLinus Torvalds cinfo.type = KERNEL_CLIENT; 2771da177e4SLinus Torvalds name = rmidi->name[0] ? (const char *)rmidi->name : "External MIDI"; 2781da177e4SLinus Torvalds strlcpy(cinfo.name, name, sizeof(cinfo.name)); 2791da177e4SLinus Torvalds return snd_seq_kernel_client_ctl(client->seq_client, SNDRV_SEQ_IOCTL_SET_CLIENT_INFO, &cinfo); 2801da177e4SLinus Torvalds } 2811da177e4SLinus Torvalds 2821da177e4SLinus Torvalds /* register new midi synth port */ 2831da177e4SLinus Torvalds static int 2841da177e4SLinus Torvalds snd_seq_midisynth_register_port(snd_seq_device_t *dev) 2851da177e4SLinus Torvalds { 2861da177e4SLinus Torvalds seq_midisynth_client_t *client; 2871da177e4SLinus Torvalds seq_midisynth_t *msynth, *ms; 2881da177e4SLinus Torvalds snd_seq_port_info_t *port; 2891da177e4SLinus Torvalds snd_rawmidi_info_t *info; 2901da177e4SLinus Torvalds int newclient = 0; 2911da177e4SLinus Torvalds unsigned int p, ports; 2921da177e4SLinus Torvalds snd_seq_client_callback_t callbacks; 2931da177e4SLinus Torvalds snd_seq_port_callback_t pcallbacks; 2941da177e4SLinus Torvalds snd_card_t *card = dev->card; 2951da177e4SLinus Torvalds int device = dev->device; 2961da177e4SLinus Torvalds unsigned int input_count = 0, output_count = 0; 2971da177e4SLinus Torvalds 2981da177e4SLinus Torvalds snd_assert(card != NULL && device >= 0 && device < SNDRV_RAWMIDI_DEVICES, return -EINVAL); 2991da177e4SLinus Torvalds info = kmalloc(sizeof(*info), GFP_KERNEL); 3001da177e4SLinus Torvalds if (! info) 3011da177e4SLinus Torvalds return -ENOMEM; 3021da177e4SLinus Torvalds info->device = device; 3031da177e4SLinus Torvalds info->stream = SNDRV_RAWMIDI_STREAM_OUTPUT; 3041da177e4SLinus Torvalds info->subdevice = 0; 3051da177e4SLinus Torvalds if (snd_rawmidi_info_select(card, info) >= 0) 3061da177e4SLinus Torvalds output_count = info->subdevices_count; 3071da177e4SLinus Torvalds info->stream = SNDRV_RAWMIDI_STREAM_INPUT; 3081da177e4SLinus Torvalds if (snd_rawmidi_info_select(card, info) >= 0) { 3091da177e4SLinus Torvalds input_count = info->subdevices_count; 3101da177e4SLinus Torvalds } 3111da177e4SLinus Torvalds ports = output_count; 3121da177e4SLinus Torvalds if (ports < input_count) 3131da177e4SLinus Torvalds ports = input_count; 3141da177e4SLinus Torvalds if (ports == 0) { 3151da177e4SLinus Torvalds kfree(info); 3161da177e4SLinus Torvalds return -ENODEV; 3171da177e4SLinus Torvalds } 3181da177e4SLinus Torvalds if (ports > (256 / SNDRV_RAWMIDI_DEVICES)) 3191da177e4SLinus Torvalds ports = 256 / SNDRV_RAWMIDI_DEVICES; 3201da177e4SLinus Torvalds 3211da177e4SLinus Torvalds down(®ister_mutex); 3221da177e4SLinus Torvalds client = synths[card->number]; 3231da177e4SLinus Torvalds if (client == NULL) { 3241da177e4SLinus Torvalds newclient = 1; 325ecca82b4STakashi Iwai client = kzalloc(sizeof(*client), GFP_KERNEL); 3261da177e4SLinus Torvalds if (client == NULL) { 3271da177e4SLinus Torvalds up(®ister_mutex); 3281da177e4SLinus Torvalds kfree(info); 3291da177e4SLinus Torvalds return -ENOMEM; 3301da177e4SLinus Torvalds } 3311da177e4SLinus Torvalds memset(&callbacks, 0, sizeof(callbacks)); 3321da177e4SLinus Torvalds callbacks.private_data = client; 3331da177e4SLinus Torvalds callbacks.allow_input = callbacks.allow_output = 1; 3341da177e4SLinus Torvalds client->seq_client = snd_seq_create_kernel_client(card, 0, &callbacks); 3351da177e4SLinus Torvalds if (client->seq_client < 0) { 3361da177e4SLinus Torvalds kfree(client); 3371da177e4SLinus Torvalds up(®ister_mutex); 3381da177e4SLinus Torvalds kfree(info); 3391da177e4SLinus Torvalds return -ENOMEM; 3401da177e4SLinus Torvalds } 3411da177e4SLinus Torvalds set_client_name(client, card, info); 3421da177e4SLinus Torvalds } else if (device == 0) 3431da177e4SLinus Torvalds set_client_name(client, card, info); /* use the first device's name */ 3441da177e4SLinus Torvalds 3451da177e4SLinus Torvalds msynth = kcalloc(ports, sizeof(seq_midisynth_t), GFP_KERNEL); 3461da177e4SLinus Torvalds port = kmalloc(sizeof(*port), GFP_KERNEL); 3471da177e4SLinus Torvalds if (msynth == NULL || port == NULL) 3481da177e4SLinus Torvalds goto __nomem; 3491da177e4SLinus Torvalds 3501da177e4SLinus Torvalds for (p = 0; p < ports; p++) { 3511da177e4SLinus Torvalds ms = &msynth[p]; 3521da177e4SLinus Torvalds 3531da177e4SLinus Torvalds if (snd_seq_midisynth_new(ms, card, device, p) < 0) 3541da177e4SLinus Torvalds goto __nomem; 3551da177e4SLinus Torvalds 3561da177e4SLinus Torvalds /* declare port */ 3571da177e4SLinus Torvalds memset(port, 0, sizeof(*port)); 3581da177e4SLinus Torvalds port->addr.client = client->seq_client; 3591da177e4SLinus Torvalds port->addr.port = device * (256 / SNDRV_RAWMIDI_DEVICES) + p; 3601da177e4SLinus Torvalds port->flags = SNDRV_SEQ_PORT_FLG_GIVEN_PORT; 3611da177e4SLinus Torvalds memset(info, 0, sizeof(*info)); 3621da177e4SLinus Torvalds info->device = device; 3631da177e4SLinus Torvalds if (p < output_count) 3641da177e4SLinus Torvalds info->stream = SNDRV_RAWMIDI_STREAM_OUTPUT; 3651da177e4SLinus Torvalds else 3661da177e4SLinus Torvalds info->stream = SNDRV_RAWMIDI_STREAM_INPUT; 3671da177e4SLinus Torvalds info->subdevice = p; 3681da177e4SLinus Torvalds if (snd_rawmidi_info_select(card, info) >= 0) 3691da177e4SLinus Torvalds strcpy(port->name, info->subname); 3701da177e4SLinus Torvalds if (! port->name[0]) { 3711da177e4SLinus Torvalds if (info->name[0]) { 3721da177e4SLinus Torvalds if (ports > 1) 3731da177e4SLinus Torvalds snprintf(port->name, sizeof(port->name), "%s-%d", info->name, p); 3741da177e4SLinus Torvalds else 3751da177e4SLinus Torvalds snprintf(port->name, sizeof(port->name), "%s", info->name); 3761da177e4SLinus Torvalds } else { 3771da177e4SLinus Torvalds /* last resort */ 3781da177e4SLinus Torvalds if (ports > 1) 3791da177e4SLinus Torvalds sprintf(port->name, "MIDI %d-%d-%d", card->number, device, p); 3801da177e4SLinus Torvalds else 3811da177e4SLinus Torvalds sprintf(port->name, "MIDI %d-%d", card->number, device); 3821da177e4SLinus Torvalds } 3831da177e4SLinus Torvalds } 3841da177e4SLinus Torvalds if ((info->flags & SNDRV_RAWMIDI_INFO_OUTPUT) && p < output_count) 3851da177e4SLinus Torvalds port->capability |= SNDRV_SEQ_PORT_CAP_WRITE | SNDRV_SEQ_PORT_CAP_SYNC_WRITE | SNDRV_SEQ_PORT_CAP_SUBS_WRITE; 3861da177e4SLinus Torvalds if ((info->flags & SNDRV_RAWMIDI_INFO_INPUT) && p < input_count) 3871da177e4SLinus Torvalds port->capability |= SNDRV_SEQ_PORT_CAP_READ | SNDRV_SEQ_PORT_CAP_SYNC_READ | SNDRV_SEQ_PORT_CAP_SUBS_READ; 3881da177e4SLinus Torvalds if ((port->capability & (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_READ)) == (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_READ) && 3891da177e4SLinus Torvalds info->flags & SNDRV_RAWMIDI_INFO_DUPLEX) 3901da177e4SLinus Torvalds port->capability |= SNDRV_SEQ_PORT_CAP_DUPLEX; 3911da177e4SLinus Torvalds port->type = SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC; 3921da177e4SLinus Torvalds port->midi_channels = 16; 3931da177e4SLinus Torvalds memset(&pcallbacks, 0, sizeof(pcallbacks)); 3941da177e4SLinus Torvalds pcallbacks.owner = THIS_MODULE; 3951da177e4SLinus Torvalds pcallbacks.private_data = ms; 3961da177e4SLinus Torvalds pcallbacks.subscribe = midisynth_subscribe; 3971da177e4SLinus Torvalds pcallbacks.unsubscribe = midisynth_unsubscribe; 3981da177e4SLinus Torvalds pcallbacks.use = midisynth_use; 3991da177e4SLinus Torvalds pcallbacks.unuse = midisynth_unuse; 4001da177e4SLinus Torvalds pcallbacks.event_input = event_process_midi; 4011da177e4SLinus Torvalds port->kernel = &pcallbacks; 4021da177e4SLinus Torvalds if (snd_seq_kernel_client_ctl(client->seq_client, SNDRV_SEQ_IOCTL_CREATE_PORT, port)<0) 4031da177e4SLinus Torvalds goto __nomem; 4041da177e4SLinus Torvalds ms->seq_client = client->seq_client; 4051da177e4SLinus Torvalds ms->seq_port = port->addr.port; 4061da177e4SLinus Torvalds } 4071da177e4SLinus Torvalds client->ports_per_device[device] = ports; 4081da177e4SLinus Torvalds client->ports[device] = msynth; 4091da177e4SLinus Torvalds client->num_ports++; 4101da177e4SLinus Torvalds if (newclient) 4111da177e4SLinus Torvalds synths[card->number] = client; 4121da177e4SLinus Torvalds up(®ister_mutex); 41351f633daSTakashi Iwai kfree(info); 41451f633daSTakashi Iwai kfree(port); 4151da177e4SLinus Torvalds return 0; /* success */ 4161da177e4SLinus Torvalds 4171da177e4SLinus Torvalds __nomem: 4181da177e4SLinus Torvalds if (msynth != NULL) { 4191da177e4SLinus Torvalds for (p = 0; p < ports; p++) 4201da177e4SLinus Torvalds snd_seq_midisynth_delete(&msynth[p]); 4211da177e4SLinus Torvalds kfree(msynth); 4221da177e4SLinus Torvalds } 4231da177e4SLinus Torvalds if (newclient) { 4241da177e4SLinus Torvalds snd_seq_delete_kernel_client(client->seq_client); 4251da177e4SLinus Torvalds kfree(client); 4261da177e4SLinus Torvalds } 4271da177e4SLinus Torvalds kfree(info); 4281da177e4SLinus Torvalds kfree(port); 4291da177e4SLinus Torvalds up(®ister_mutex); 4301da177e4SLinus Torvalds return -ENOMEM; 4311da177e4SLinus Torvalds } 4321da177e4SLinus Torvalds 4331da177e4SLinus Torvalds /* release midi synth port */ 4341da177e4SLinus Torvalds static int 4351da177e4SLinus Torvalds snd_seq_midisynth_unregister_port(snd_seq_device_t *dev) 4361da177e4SLinus Torvalds { 4371da177e4SLinus Torvalds seq_midisynth_client_t *client; 4381da177e4SLinus Torvalds seq_midisynth_t *msynth; 4391da177e4SLinus Torvalds snd_card_t *card = dev->card; 4401da177e4SLinus Torvalds int device = dev->device, p, ports; 4411da177e4SLinus Torvalds 4421da177e4SLinus Torvalds down(®ister_mutex); 4431da177e4SLinus Torvalds client = synths[card->number]; 4441da177e4SLinus Torvalds if (client == NULL || client->ports[device] == NULL) { 4451da177e4SLinus Torvalds up(®ister_mutex); 4461da177e4SLinus Torvalds return -ENODEV; 4471da177e4SLinus Torvalds } 4481da177e4SLinus Torvalds ports = client->ports_per_device[device]; 4491da177e4SLinus Torvalds client->ports_per_device[device] = 0; 4501da177e4SLinus Torvalds msynth = client->ports[device]; 4511da177e4SLinus Torvalds client->ports[device] = NULL; 4521da177e4SLinus Torvalds snd_runtime_check(msynth != NULL || ports <= 0, goto __skip); 4531da177e4SLinus Torvalds for (p = 0; p < ports; p++) 4541da177e4SLinus Torvalds snd_seq_midisynth_delete(&msynth[p]); 4551da177e4SLinus Torvalds kfree(msynth); 4561da177e4SLinus Torvalds __skip: 4571da177e4SLinus Torvalds client->num_ports--; 4581da177e4SLinus Torvalds if (client->num_ports <= 0) { 4591da177e4SLinus Torvalds snd_seq_delete_kernel_client(client->seq_client); 4601da177e4SLinus Torvalds synths[card->number] = NULL; 4611da177e4SLinus Torvalds kfree(client); 4621da177e4SLinus Torvalds } 4631da177e4SLinus Torvalds up(®ister_mutex); 4641da177e4SLinus Torvalds return 0; 4651da177e4SLinus Torvalds } 4661da177e4SLinus Torvalds 4671da177e4SLinus Torvalds 4681da177e4SLinus Torvalds static int __init alsa_seq_midi_init(void) 4691da177e4SLinus Torvalds { 4701da177e4SLinus Torvalds static snd_seq_dev_ops_t ops = { 4711da177e4SLinus Torvalds snd_seq_midisynth_register_port, 4721da177e4SLinus Torvalds snd_seq_midisynth_unregister_port, 4731da177e4SLinus Torvalds }; 4741da177e4SLinus Torvalds memset(&synths, 0, sizeof(synths)); 4751da177e4SLinus Torvalds snd_seq_autoload_lock(); 4761da177e4SLinus Torvalds snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_MIDISYNTH, &ops, 0); 4771da177e4SLinus Torvalds snd_seq_autoload_unlock(); 4781da177e4SLinus Torvalds return 0; 4791da177e4SLinus Torvalds } 4801da177e4SLinus Torvalds 4811da177e4SLinus Torvalds static void __exit alsa_seq_midi_exit(void) 4821da177e4SLinus Torvalds { 4831da177e4SLinus Torvalds snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_MIDISYNTH); 4841da177e4SLinus Torvalds } 4851da177e4SLinus Torvalds 4861da177e4SLinus Torvalds module_init(alsa_seq_midi_init) 4871da177e4SLinus Torvalds module_exit(alsa_seq_midi_exit) 488