286 lines
6.9 KiB
C
286 lines
6.9 KiB
C
/*
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* Interface for OSS sequencer emulation
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*
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* Copyright (C) 2000 Uros Bizjak <uros@kss-loka.si>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/export.h>
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#include "opl3_voice.h"
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static int snd_opl3_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure);
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static int snd_opl3_close_seq_oss(struct snd_seq_oss_arg *arg);
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static int snd_opl3_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd, unsigned long ioarg);
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static int snd_opl3_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format, const char __user *buf, int offs, int count);
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static int snd_opl3_reset_seq_oss(struct snd_seq_oss_arg *arg);
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/* */
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static inline mm_segment_t snd_enter_user(void)
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{
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mm_segment_t fs = get_fs();
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set_fs(get_ds());
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return fs;
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}
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static inline void snd_leave_user(mm_segment_t fs)
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{
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set_fs(fs);
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}
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/* operators */
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extern struct snd_midi_op opl3_ops;
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static struct snd_seq_oss_callback oss_callback = {
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.owner = THIS_MODULE,
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.open = snd_opl3_open_seq_oss,
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.close = snd_opl3_close_seq_oss,
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.ioctl = snd_opl3_ioctl_seq_oss,
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.load_patch = snd_opl3_load_patch_seq_oss,
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.reset = snd_opl3_reset_seq_oss,
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};
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static int snd_opl3_oss_event_input(struct snd_seq_event *ev, int direct,
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void *private_data, int atomic, int hop)
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{
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struct snd_opl3 *opl3 = private_data;
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if (ev->type != SNDRV_SEQ_EVENT_OSS)
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snd_midi_process_event(&opl3_ops, ev, opl3->oss_chset);
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return 0;
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}
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/* ------------------------------ */
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static void snd_opl3_oss_free_port(void *private_data)
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{
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struct snd_opl3 *opl3 = private_data;
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snd_midi_channel_free_set(opl3->oss_chset);
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}
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static int snd_opl3_oss_create_port(struct snd_opl3 * opl3)
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{
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struct snd_seq_port_callback callbacks;
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char name[32];
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int voices, opl_ver;
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voices = (opl3->hardware < OPL3_HW_OPL3) ?
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MAX_OPL2_VOICES : MAX_OPL3_VOICES;
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opl3->oss_chset = snd_midi_channel_alloc_set(voices);
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if (opl3->oss_chset == NULL)
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return -ENOMEM;
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opl3->oss_chset->private_data = opl3;
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memset(&callbacks, 0, sizeof(callbacks));
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callbacks.owner = THIS_MODULE;
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callbacks.event_input = snd_opl3_oss_event_input;
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callbacks.private_free = snd_opl3_oss_free_port;
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callbacks.private_data = opl3;
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opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8;
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sprintf(name, "OPL%i OSS Port", opl_ver);
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opl3->oss_chset->client = opl3->seq_client;
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opl3->oss_chset->port = snd_seq_event_port_attach(opl3->seq_client, &callbacks,
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SNDRV_SEQ_PORT_CAP_WRITE,
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SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
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SNDRV_SEQ_PORT_TYPE_MIDI_GM |
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SNDRV_SEQ_PORT_TYPE_HARDWARE |
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SNDRV_SEQ_PORT_TYPE_SYNTHESIZER,
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voices, voices,
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name);
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if (opl3->oss_chset->port < 0) {
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int port;
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port = opl3->oss_chset->port;
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snd_midi_channel_free_set(opl3->oss_chset);
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return port;
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}
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return 0;
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}
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/* ------------------------------ */
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/* register OSS synth */
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void snd_opl3_init_seq_oss(struct snd_opl3 *opl3, char *name)
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{
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struct snd_seq_oss_reg *arg;
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struct snd_seq_device *dev;
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if (snd_seq_device_new(opl3->card, 0, SNDRV_SEQ_DEV_ID_OSS,
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sizeof(struct snd_seq_oss_reg), &dev) < 0)
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return;
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opl3->oss_seq_dev = dev;
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strlcpy(dev->name, name, sizeof(dev->name));
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arg = SNDRV_SEQ_DEVICE_ARGPTR(dev);
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arg->type = SYNTH_TYPE_FM;
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if (opl3->hardware < OPL3_HW_OPL3) {
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arg->subtype = FM_TYPE_ADLIB;
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arg->nvoices = MAX_OPL2_VOICES;
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} else {
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arg->subtype = FM_TYPE_OPL3;
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arg->nvoices = MAX_OPL3_VOICES;
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}
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arg->oper = oss_callback;
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arg->private_data = opl3;
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if (snd_opl3_oss_create_port(opl3)) {
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/* register to OSS synth table */
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snd_device_register(opl3->card, dev);
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}
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}
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/* unregister */
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void snd_opl3_free_seq_oss(struct snd_opl3 *opl3)
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{
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if (opl3->oss_seq_dev) {
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/* The instance should have been released in prior */
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opl3->oss_seq_dev = NULL;
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}
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}
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/* ------------------------------ */
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/* open OSS sequencer */
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static int snd_opl3_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure)
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{
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struct snd_opl3 *opl3 = closure;
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int err;
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if (snd_BUG_ON(!arg))
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return -ENXIO;
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if ((err = snd_opl3_synth_setup(opl3)) < 0)
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return err;
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/* fill the argument data */
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arg->private_data = opl3;
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arg->addr.client = opl3->oss_chset->client;
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arg->addr.port = opl3->oss_chset->port;
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if ((err = snd_opl3_synth_use_inc(opl3)) < 0)
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return err;
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opl3->synth_mode = SNDRV_OPL3_MODE_SYNTH;
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return 0;
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}
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/* close OSS sequencer */
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static int snd_opl3_close_seq_oss(struct snd_seq_oss_arg *arg)
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{
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struct snd_opl3 *opl3;
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if (snd_BUG_ON(!arg))
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return -ENXIO;
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opl3 = arg->private_data;
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snd_opl3_synth_cleanup(opl3);
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snd_opl3_synth_use_dec(opl3);
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return 0;
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}
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/* load patch */
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/* from sound_config.h */
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#define SBFM_MAXINSTR 256
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static int snd_opl3_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format,
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const char __user *buf, int offs, int count)
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{
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struct snd_opl3 *opl3;
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struct sbi_instrument sbi;
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char name[32];
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int err, type;
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if (snd_BUG_ON(!arg))
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return -ENXIO;
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opl3 = arg->private_data;
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if (format == FM_PATCH)
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type = FM_PATCH_OPL2;
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else if (format == OPL3_PATCH)
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type = FM_PATCH_OPL3;
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else
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return -EINVAL;
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if (count < (int)sizeof(sbi)) {
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snd_printk(KERN_ERR "FM Error: Patch record too short\n");
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return -EINVAL;
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}
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if (copy_from_user(&sbi, buf, sizeof(sbi)))
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return -EFAULT;
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if (sbi.channel < 0 || sbi.channel >= SBFM_MAXINSTR) {
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snd_printk(KERN_ERR "FM Error: Invalid instrument number %d\n",
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sbi.channel);
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return -EINVAL;
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}
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memset(name, 0, sizeof(name));
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sprintf(name, "Chan%d", sbi.channel);
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err = snd_opl3_load_patch(opl3, sbi.channel, 127, type, name, NULL,
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sbi.operators);
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if (err < 0)
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return err;
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return sizeof(sbi);
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}
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/* ioctl */
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static int snd_opl3_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd,
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unsigned long ioarg)
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{
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struct snd_opl3 *opl3;
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if (snd_BUG_ON(!arg))
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return -ENXIO;
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opl3 = arg->private_data;
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switch (cmd) {
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case SNDCTL_FM_LOAD_INSTR:
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snd_printk(KERN_ERR "OPL3: "
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"Obsolete ioctl(SNDCTL_FM_LOAD_INSTR) used. "
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"Fix the program.\n");
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return -EINVAL;
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case SNDCTL_SYNTH_MEMAVL:
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return 0x7fffffff;
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case SNDCTL_FM_4OP_ENABLE:
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// handled automatically by OPL instrument type
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return 0;
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default:
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return -EINVAL;
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}
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return 0;
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}
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/* reset device */
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static int snd_opl3_reset_seq_oss(struct snd_seq_oss_arg *arg)
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{
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struct snd_opl3 *opl3;
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if (snd_BUG_ON(!arg))
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return -ENXIO;
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opl3 = arg->private_data;
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return 0;
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}
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