diff options
Diffstat (limited to 'sound/core/seq/oss/seq_oss_synth.c')
-rw-r--r-- | sound/core/seq/oss/seq_oss_synth.c | 661 |
1 files changed, 661 insertions, 0 deletions
diff --git a/sound/core/seq/oss/seq_oss_synth.c b/sound/core/seq/oss/seq_oss_synth.c new file mode 100644 index 000000000..48e4fe1b6 --- /dev/null +++ b/sound/core/seq/oss/seq_oss_synth.c @@ -0,0 +1,661 @@ +/* + * OSS compatible sequencer driver + * + * synth device handlers + * + * Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include "seq_oss_synth.h" +#include "seq_oss_midi.h" +#include "../seq_lock.h" +#include <linux/init.h> +#include <linux/module.h> +#include <linux/slab.h> + +/* + * constants + */ +#define SNDRV_SEQ_OSS_MAX_SYNTH_NAME 30 +#define MAX_SYSEX_BUFLEN 128 + + +/* + * definition of synth info records + */ + +/* sysex buffer */ +struct seq_oss_synth_sysex { + int len; + int skip; + unsigned char buf[MAX_SYSEX_BUFLEN]; +}; + +/* synth info */ +struct seq_oss_synth { + int seq_device; + + /* for synth_info */ + int synth_type; + int synth_subtype; + int nr_voices; + + char name[SNDRV_SEQ_OSS_MAX_SYNTH_NAME]; + struct snd_seq_oss_callback oper; + + int opened; + + void *private_data; + snd_use_lock_t use_lock; +}; + + +/* + * device table + */ +static int max_synth_devs; +static struct seq_oss_synth *synth_devs[SNDRV_SEQ_OSS_MAX_SYNTH_DEVS]; +static struct seq_oss_synth midi_synth_dev = { + -1, /* seq_device */ + SYNTH_TYPE_MIDI, /* synth_type */ + 0, /* synth_subtype */ + 16, /* nr_voices */ + "MIDI", /* name */ +}; + +static DEFINE_SPINLOCK(register_lock); + +/* + * prototypes + */ +static struct seq_oss_synth *get_synthdev(struct seq_oss_devinfo *dp, int dev); +static void reset_channels(struct seq_oss_synthinfo *info); + +/* + * global initialization + */ +void __init +snd_seq_oss_synth_init(void) +{ + snd_use_lock_init(&midi_synth_dev.use_lock); +} + +/* + * registration of the synth device + */ +int +snd_seq_oss_synth_probe(struct device *_dev) +{ + struct snd_seq_device *dev = to_seq_dev(_dev); + int i; + struct seq_oss_synth *rec; + struct snd_seq_oss_reg *reg = SNDRV_SEQ_DEVICE_ARGPTR(dev); + unsigned long flags; + + rec = kzalloc(sizeof(*rec), GFP_KERNEL); + if (!rec) + return -ENOMEM; + rec->seq_device = -1; + rec->synth_type = reg->type; + rec->synth_subtype = reg->subtype; + rec->nr_voices = reg->nvoices; + rec->oper = reg->oper; + rec->private_data = reg->private_data; + rec->opened = 0; + snd_use_lock_init(&rec->use_lock); + + /* copy and truncate the name of synth device */ + strlcpy(rec->name, dev->name, sizeof(rec->name)); + + /* registration */ + spin_lock_irqsave(®ister_lock, flags); + for (i = 0; i < max_synth_devs; i++) { + if (synth_devs[i] == NULL) + break; + } + if (i >= max_synth_devs) { + if (max_synth_devs >= SNDRV_SEQ_OSS_MAX_SYNTH_DEVS) { + spin_unlock_irqrestore(®ister_lock, flags); + pr_err("ALSA: seq_oss: no more synth slot\n"); + kfree(rec); + return -ENOMEM; + } + max_synth_devs++; + } + rec->seq_device = i; + synth_devs[i] = rec; + spin_unlock_irqrestore(®ister_lock, flags); + dev->driver_data = rec; +#ifdef SNDRV_OSS_INFO_DEV_SYNTH + if (i < SNDRV_CARDS) + snd_oss_info_register(SNDRV_OSS_INFO_DEV_SYNTH, i, rec->name); +#endif + return 0; +} + + +int +snd_seq_oss_synth_remove(struct device *_dev) +{ + struct snd_seq_device *dev = to_seq_dev(_dev); + int index; + struct seq_oss_synth *rec = dev->driver_data; + unsigned long flags; + + spin_lock_irqsave(®ister_lock, flags); + for (index = 0; index < max_synth_devs; index++) { + if (synth_devs[index] == rec) + break; + } + if (index >= max_synth_devs) { + spin_unlock_irqrestore(®ister_lock, flags); + pr_err("ALSA: seq_oss: can't unregister synth\n"); + return -EINVAL; + } + synth_devs[index] = NULL; + if (index == max_synth_devs - 1) { + for (index--; index >= 0; index--) { + if (synth_devs[index]) + break; + } + max_synth_devs = index + 1; + } + spin_unlock_irqrestore(®ister_lock, flags); +#ifdef SNDRV_OSS_INFO_DEV_SYNTH + if (rec->seq_device < SNDRV_CARDS) + snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_SYNTH, rec->seq_device); +#endif + + snd_use_lock_sync(&rec->use_lock); + kfree(rec); + + return 0; +} + + +/* + */ +static struct seq_oss_synth * +get_sdev(int dev) +{ + struct seq_oss_synth *rec; + unsigned long flags; + + spin_lock_irqsave(®ister_lock, flags); + rec = synth_devs[dev]; + if (rec) + snd_use_lock_use(&rec->use_lock); + spin_unlock_irqrestore(®ister_lock, flags); + return rec; +} + + +/* + * set up synth tables + */ + +void +snd_seq_oss_synth_setup(struct seq_oss_devinfo *dp) +{ + int i; + struct seq_oss_synth *rec; + struct seq_oss_synthinfo *info; + + dp->max_synthdev = max_synth_devs; + dp->synth_opened = 0; + memset(dp->synths, 0, sizeof(dp->synths)); + for (i = 0; i < dp->max_synthdev; i++) { + rec = get_sdev(i); + if (rec == NULL) + continue; + if (rec->oper.open == NULL || rec->oper.close == NULL) { + snd_use_lock_free(&rec->use_lock); + continue; + } + info = &dp->synths[i]; + info->arg.app_index = dp->port; + info->arg.file_mode = dp->file_mode; + info->arg.seq_mode = dp->seq_mode; + if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_SYNTH) + info->arg.event_passing = SNDRV_SEQ_OSS_PROCESS_EVENTS; + else + info->arg.event_passing = SNDRV_SEQ_OSS_PASS_EVENTS; + info->opened = 0; + if (!try_module_get(rec->oper.owner)) { + snd_use_lock_free(&rec->use_lock); + continue; + } + if (rec->oper.open(&info->arg, rec->private_data) < 0) { + module_put(rec->oper.owner); + snd_use_lock_free(&rec->use_lock); + continue; + } + info->nr_voices = rec->nr_voices; + if (info->nr_voices > 0) { + info->ch = kcalloc(info->nr_voices, sizeof(struct seq_oss_chinfo), GFP_KERNEL); + if (!info->ch) { + rec->oper.close(&info->arg); + module_put(rec->oper.owner); + snd_use_lock_free(&rec->use_lock); + continue; + } + reset_channels(info); + } + info->opened++; + rec->opened++; + dp->synth_opened++; + snd_use_lock_free(&rec->use_lock); + } +} + + +/* + * set up synth tables for MIDI emulation - /dev/music mode only + */ + +void +snd_seq_oss_synth_setup_midi(struct seq_oss_devinfo *dp) +{ + int i; + + if (dp->max_synthdev >= SNDRV_SEQ_OSS_MAX_SYNTH_DEVS) + return; + + for (i = 0; i < dp->max_mididev; i++) { + struct seq_oss_synthinfo *info; + info = &dp->synths[dp->max_synthdev]; + if (snd_seq_oss_midi_open(dp, i, dp->file_mode) < 0) + continue; + info->arg.app_index = dp->port; + info->arg.file_mode = dp->file_mode; + info->arg.seq_mode = dp->seq_mode; + info->arg.private_data = info; + info->is_midi = 1; + info->midi_mapped = i; + info->arg.event_passing = SNDRV_SEQ_OSS_PASS_EVENTS; + snd_seq_oss_midi_get_addr(dp, i, &info->arg.addr); + info->opened = 1; + midi_synth_dev.opened++; + dp->max_synthdev++; + if (dp->max_synthdev >= SNDRV_SEQ_OSS_MAX_SYNTH_DEVS) + break; + } +} + + +/* + * clean up synth tables + */ + +void +snd_seq_oss_synth_cleanup(struct seq_oss_devinfo *dp) +{ + int i; + struct seq_oss_synth *rec; + struct seq_oss_synthinfo *info; + + if (snd_BUG_ON(dp->max_synthdev >= SNDRV_SEQ_OSS_MAX_SYNTH_DEVS)) + return; + for (i = 0; i < dp->max_synthdev; i++) { + info = &dp->synths[i]; + if (! info->opened) + continue; + if (info->is_midi) { + if (midi_synth_dev.opened > 0) { + snd_seq_oss_midi_close(dp, info->midi_mapped); + midi_synth_dev.opened--; + } + } else { + rec = get_sdev(i); + if (rec == NULL) + continue; + if (rec->opened > 0) { + rec->oper.close(&info->arg); + module_put(rec->oper.owner); + rec->opened = 0; + } + snd_use_lock_free(&rec->use_lock); + } + kfree(info->sysex); + info->sysex = NULL; + kfree(info->ch); + info->ch = NULL; + } + dp->synth_opened = 0; + dp->max_synthdev = 0; +} + +/* + * check if the specified device is MIDI mapped device + */ +static int +is_midi_dev(struct seq_oss_devinfo *dp, int dev) +{ + if (dev < 0 || dev >= dp->max_synthdev) + return 0; + if (dp->synths[dev].is_midi) + return 1; + return 0; +} + +/* + * return synth device information pointer + */ +static struct seq_oss_synth * +get_synthdev(struct seq_oss_devinfo *dp, int dev) +{ + struct seq_oss_synth *rec; + if (dev < 0 || dev >= dp->max_synthdev) + return NULL; + if (! dp->synths[dev].opened) + return NULL; + if (dp->synths[dev].is_midi) + return &midi_synth_dev; + if ((rec = get_sdev(dev)) == NULL) + return NULL; + if (! rec->opened) { + snd_use_lock_free(&rec->use_lock); + return NULL; + } + return rec; +} + + +/* + * reset note and velocity on each channel. + */ +static void +reset_channels(struct seq_oss_synthinfo *info) +{ + int i; + if (info->ch == NULL || ! info->nr_voices) + return; + for (i = 0; i < info->nr_voices; i++) { + info->ch[i].note = -1; + info->ch[i].vel = 0; + } +} + + +/* + * reset synth device: + * call reset callback. if no callback is defined, send a heartbeat + * event to the corresponding port. + */ +void +snd_seq_oss_synth_reset(struct seq_oss_devinfo *dp, int dev) +{ + struct seq_oss_synth *rec; + struct seq_oss_synthinfo *info; + + if (snd_BUG_ON(dev < 0 || dev >= dp->max_synthdev)) + return; + info = &dp->synths[dev]; + if (! info->opened) + return; + if (info->sysex) + info->sysex->len = 0; /* reset sysex */ + reset_channels(info); + if (info->is_midi) { + if (midi_synth_dev.opened <= 0) + return; + snd_seq_oss_midi_reset(dp, info->midi_mapped); + /* reopen the device */ + snd_seq_oss_midi_close(dp, dev); + if (snd_seq_oss_midi_open(dp, info->midi_mapped, + dp->file_mode) < 0) { + midi_synth_dev.opened--; + info->opened = 0; + kfree(info->sysex); + info->sysex = NULL; + kfree(info->ch); + info->ch = NULL; + } + return; + } + + rec = get_sdev(dev); + if (rec == NULL) + return; + if (rec->oper.reset) { + rec->oper.reset(&info->arg); + } else { + struct snd_seq_event ev; + memset(&ev, 0, sizeof(ev)); + snd_seq_oss_fill_addr(dp, &ev, info->arg.addr.client, + info->arg.addr.port); + ev.type = SNDRV_SEQ_EVENT_RESET; + snd_seq_oss_dispatch(dp, &ev, 0, 0); + } + snd_use_lock_free(&rec->use_lock); +} + + +/* + * load a patch record: + * call load_patch callback function + */ +int +snd_seq_oss_synth_load_patch(struct seq_oss_devinfo *dp, int dev, int fmt, + const char __user *buf, int p, int c) +{ + struct seq_oss_synth *rec; + int rc; + + if (dev < 0 || dev >= dp->max_synthdev) + return -ENXIO; + + if (is_midi_dev(dp, dev)) + return 0; + if ((rec = get_synthdev(dp, dev)) == NULL) + return -ENXIO; + + if (rec->oper.load_patch == NULL) + rc = -ENXIO; + else + rc = rec->oper.load_patch(&dp->synths[dev].arg, fmt, buf, p, c); + snd_use_lock_free(&rec->use_lock); + return rc; +} + +/* + * check if the device is valid synth device + */ +int +snd_seq_oss_synth_is_valid(struct seq_oss_devinfo *dp, int dev) +{ + struct seq_oss_synth *rec; + rec = get_synthdev(dp, dev); + if (rec) { + snd_use_lock_free(&rec->use_lock); + return 1; + } + return 0; +} + + +/* + * receive OSS 6 byte sysex packet: + * the full sysex message will be sent if it reaches to the end of data + * (0xff). + */ +int +snd_seq_oss_synth_sysex(struct seq_oss_devinfo *dp, int dev, unsigned char *buf, struct snd_seq_event *ev) +{ + int i, send; + unsigned char *dest; + struct seq_oss_synth_sysex *sysex; + + if (! snd_seq_oss_synth_is_valid(dp, dev)) + return -ENXIO; + + sysex = dp->synths[dev].sysex; + if (sysex == NULL) { + sysex = kzalloc(sizeof(*sysex), GFP_KERNEL); + if (sysex == NULL) + return -ENOMEM; + dp->synths[dev].sysex = sysex; + } + + send = 0; + dest = sysex->buf + sysex->len; + /* copy 6 byte packet to the buffer */ + for (i = 0; i < 6; i++) { + if (buf[i] == 0xff) { + send = 1; + break; + } + dest[i] = buf[i]; + sysex->len++; + if (sysex->len >= MAX_SYSEX_BUFLEN) { + sysex->len = 0; + sysex->skip = 1; + break; + } + } + + if (sysex->len && send) { + if (sysex->skip) { + sysex->skip = 0; + sysex->len = 0; + return -EINVAL; /* skip */ + } + /* copy the data to event record and send it */ + ev->flags = SNDRV_SEQ_EVENT_LENGTH_VARIABLE; + if (snd_seq_oss_synth_addr(dp, dev, ev)) + return -EINVAL; + ev->data.ext.len = sysex->len; + ev->data.ext.ptr = sysex->buf; + sysex->len = 0; + return 0; + } + + return -EINVAL; /* skip */ +} + +/* + * fill the event source/destination addresses + */ +int +snd_seq_oss_synth_addr(struct seq_oss_devinfo *dp, int dev, struct snd_seq_event *ev) +{ + if (! snd_seq_oss_synth_is_valid(dp, dev)) + return -EINVAL; + snd_seq_oss_fill_addr(dp, ev, dp->synths[dev].arg.addr.client, + dp->synths[dev].arg.addr.port); + return 0; +} + + +/* + * OSS compatible ioctl + */ +int +snd_seq_oss_synth_ioctl(struct seq_oss_devinfo *dp, int dev, unsigned int cmd, unsigned long addr) +{ + struct seq_oss_synth *rec; + int rc; + + if (is_midi_dev(dp, dev)) + return -ENXIO; + if ((rec = get_synthdev(dp, dev)) == NULL) + return -ENXIO; + if (rec->oper.ioctl == NULL) + rc = -ENXIO; + else + rc = rec->oper.ioctl(&dp->synths[dev].arg, cmd, addr); + snd_use_lock_free(&rec->use_lock); + return rc; +} + + +/* + * send OSS raw events - SEQ_PRIVATE and SEQ_VOLUME + */ +int +snd_seq_oss_synth_raw_event(struct seq_oss_devinfo *dp, int dev, unsigned char *data, struct snd_seq_event *ev) +{ + if (! snd_seq_oss_synth_is_valid(dp, dev) || is_midi_dev(dp, dev)) + return -ENXIO; + ev->type = SNDRV_SEQ_EVENT_OSS; + memcpy(ev->data.raw8.d, data, 8); + return snd_seq_oss_synth_addr(dp, dev, ev); +} + + +/* + * create OSS compatible synth_info record + */ +int +snd_seq_oss_synth_make_info(struct seq_oss_devinfo *dp, int dev, struct synth_info *inf) +{ + struct seq_oss_synth *rec; + + if (dev < 0 || dev >= dp->max_synthdev) + return -ENXIO; + + if (dp->synths[dev].is_midi) { + struct midi_info minf; + snd_seq_oss_midi_make_info(dp, dp->synths[dev].midi_mapped, &minf); + inf->synth_type = SYNTH_TYPE_MIDI; + inf->synth_subtype = 0; + inf->nr_voices = 16; + inf->device = dev; + strlcpy(inf->name, minf.name, sizeof(inf->name)); + } else { + if ((rec = get_synthdev(dp, dev)) == NULL) + return -ENXIO; + inf->synth_type = rec->synth_type; + inf->synth_subtype = rec->synth_subtype; + inf->nr_voices = rec->nr_voices; + inf->device = dev; + strlcpy(inf->name, rec->name, sizeof(inf->name)); + snd_use_lock_free(&rec->use_lock); + } + return 0; +} + + +#ifdef CONFIG_PROC_FS +/* + * proc interface + */ +void +snd_seq_oss_synth_info_read(struct snd_info_buffer *buf) +{ + int i; + struct seq_oss_synth *rec; + + snd_iprintf(buf, "\nNumber of synth devices: %d\n", max_synth_devs); + for (i = 0; i < max_synth_devs; i++) { + snd_iprintf(buf, "\nsynth %d: ", i); + rec = get_sdev(i); + if (rec == NULL) { + snd_iprintf(buf, "*empty*\n"); + continue; + } + snd_iprintf(buf, "[%s]\n", rec->name); + snd_iprintf(buf, " type 0x%x : subtype 0x%x : voices %d\n", + rec->synth_type, rec->synth_subtype, + rec->nr_voices); + snd_iprintf(buf, " capabilities : ioctl %s / load_patch %s\n", + enabled_str((long)rec->oper.ioctl), + enabled_str((long)rec->oper.load_patch)); + snd_use_lock_free(&rec->use_lock); + } +} +#endif /* CONFIG_PROC_FS */ |