| /* |
| * 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> |
| #include <linux/nospec.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 = { |
| .seq_device = -1, |
| .synth_type = SYNTH_TYPE_MIDI, |
| .synth_subtype = 0, |
| .nr_voices = 16, |
| .name = "MIDI", |
| }; |
| |
| 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; |
| } |
| |
| static struct seq_oss_synthinfo * |
| get_synthinfo_nospec(struct seq_oss_devinfo *dp, int dev) |
| { |
| if (dev < 0 || dev >= dp->max_synthdev) |
| return NULL; |
| dev = array_index_nospec(dev, SNDRV_SEQ_OSS_MAX_SYNTH_DEVS); |
| return &dp->synths[dev]; |
| } |
| |
| /* |
| * return synth device information pointer |
| */ |
| static struct seq_oss_synth * |
| get_synthdev(struct seq_oss_devinfo *dp, int dev) |
| { |
| struct seq_oss_synth *rec; |
| struct seq_oss_synthinfo *info = get_synthinfo_nospec(dp, dev); |
| |
| if (!info) |
| return NULL; |
| if (!info->opened) |
| return NULL; |
| if (info->is_midi) { |
| rec = &midi_synth_dev; |
| snd_use_lock_use(&rec->use_lock); |
| } else { |
| rec = get_sdev(dev); |
| if (!rec) |
| 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; |
| |
| info = get_synthinfo_nospec(dp, dev); |
| if (!info || !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; |
| struct seq_oss_synthinfo *info; |
| int rc; |
| |
| info = get_synthinfo_nospec(dp, dev); |
| if (!info) |
| return -ENXIO; |
| |
| if (info->is_midi) |
| 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(&info->arg, fmt, buf, p, c); |
| snd_use_lock_free(&rec->use_lock); |
| return rc; |
| } |
| |
| /* |
| * check if the device is valid synth device and return the synth info |
| */ |
| struct seq_oss_synthinfo * |
| snd_seq_oss_synth_info(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 get_synthinfo_nospec(dp, dev); |
| } |
| return NULL; |
| } |
| |
| |
| /* |
| * 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; |
| struct seq_oss_synthinfo *info; |
| |
| info = snd_seq_oss_synth_info(dp, dev); |
| if (!info) |
| return -ENXIO; |
| |
| sysex = info->sysex; |
| if (sysex == NULL) { |
| sysex = kzalloc(sizeof(*sysex), GFP_KERNEL); |
| if (sysex == NULL) |
| return -ENOMEM; |
| info->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) |
| { |
| struct seq_oss_synthinfo *info = snd_seq_oss_synth_info(dp, dev); |
| |
| if (!info) |
| return -EINVAL; |
| snd_seq_oss_fill_addr(dp, ev, info->arg.addr.client, |
| info->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; |
| struct seq_oss_synthinfo *info; |
| int rc; |
| |
| info = get_synthinfo_nospec(dp, dev); |
| if (!info || info->is_midi) |
| return -ENXIO; |
| if ((rec = get_synthdev(dp, dev)) == NULL) |
| return -ENXIO; |
| if (rec->oper.ioctl == NULL) |
| rc = -ENXIO; |
| else |
| rc = rec->oper.ioctl(&info->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) |
| { |
| struct seq_oss_synthinfo *info; |
| |
| info = snd_seq_oss_synth_info(dp, dev); |
| if (!info || info->is_midi) |
| 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_SND_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_SND_PROC_FS */ |