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356 lines
9.1 KiB
356 lines
9.1 KiB
/*
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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 "opl3_voice.h"
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#include <linux/slab.h>
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static int snd_opl3_open_seq_oss(snd_seq_oss_arg_t *arg, void *closure);
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static int snd_opl3_close_seq_oss(snd_seq_oss_arg_t *arg);
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static int snd_opl3_ioctl_seq_oss(snd_seq_oss_arg_t *arg, unsigned int cmd, unsigned long ioarg);
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static int snd_opl3_load_patch_seq_oss(snd_seq_oss_arg_t *arg, int format, const char __user *buf, int offs, int count);
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static int snd_opl3_reset_seq_oss(snd_seq_oss_arg_t *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 snd_midi_op_t opl3_ops;
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static snd_seq_oss_callback_t 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(snd_seq_event_t *ev, int direct,
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void *private_data, int atomic, int hop)
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{
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opl3_t *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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opl3_t *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(opl3_t * opl3)
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{
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snd_seq_port_callback_t 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_SYNTH,
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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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snd_midi_channel_free_set(opl3->oss_chset);
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return opl3->oss_chset->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(opl3_t *opl3, char *name)
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{
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snd_seq_oss_reg_t *arg;
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snd_seq_device_t *dev;
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if (snd_seq_device_new(opl3->card, 0, SNDRV_SEQ_DEV_ID_OSS,
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sizeof(snd_seq_oss_reg_t), &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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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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/* unregister */
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void snd_opl3_free_seq_oss(opl3_t *opl3)
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{
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if (opl3->oss_seq_dev) {
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snd_device_free(opl3->card, opl3->oss_seq_dev);
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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(snd_seq_oss_arg_t *arg, void *closure)
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{
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opl3_t *opl3 = closure;
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int err;
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snd_assert(arg != NULL, 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(snd_seq_oss_arg_t *arg)
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{
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opl3_t *opl3;
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snd_assert(arg != NULL, 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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/* offsets for SBI params */
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#define AM_VIB 0
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#define KSL_LEVEL 2
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#define ATTACK_DECAY 4
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#define SUSTAIN_RELEASE 6
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#define WAVE_SELECT 8
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/* offset for SBI instrument */
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#define CONNECTION 10
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#define OFFSET_4OP 11
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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(snd_seq_oss_arg_t *arg, int format,
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const char __user *buf, int offs, int count)
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{
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opl3_t *opl3;
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int err = -EINVAL;
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snd_assert(arg != NULL, return -ENXIO);
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opl3 = arg->private_data;
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if ((format == FM_PATCH) || (format == OPL3_PATCH)) {
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struct sbi_instrument sbi;
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size_t size;
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snd_seq_instr_header_t *put;
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snd_seq_instr_data_t *data;
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fm_xinstrument_t *xinstr;
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snd_seq_event_t ev;
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int i;
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mm_segment_t fs;
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if (count < (int)sizeof(sbi)) {
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snd_printk("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("FM Error: Invalid instrument number %d\n", sbi.channel);
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return -EINVAL;
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}
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size = sizeof(*put) + sizeof(fm_xinstrument_t);
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put = kcalloc(1, size, GFP_KERNEL);
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if (put == NULL)
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return -ENOMEM;
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/* build header */
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data = &put->data;
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data->type = SNDRV_SEQ_INSTR_ATYPE_DATA;
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strcpy(data->data.format, SNDRV_SEQ_INSTR_ID_OPL2_3);
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/* build data section */
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xinstr = (fm_xinstrument_t *)(data + 1);
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xinstr->stype = FM_STRU_INSTR;
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for (i = 0; i < 2; i++) {
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xinstr->op[i].am_vib = sbi.operators[AM_VIB + i];
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xinstr->op[i].ksl_level = sbi.operators[KSL_LEVEL + i];
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xinstr->op[i].attack_decay = sbi.operators[ATTACK_DECAY + i];
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xinstr->op[i].sustain_release = sbi.operators[SUSTAIN_RELEASE + i];
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xinstr->op[i].wave_select = sbi.operators[WAVE_SELECT + i];
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}
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xinstr->feedback_connection[0] = sbi.operators[CONNECTION];
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if (format == OPL3_PATCH) {
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xinstr->type = FM_PATCH_OPL3;
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for (i = 0; i < 2; i++) {
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xinstr->op[i+2].am_vib = sbi.operators[OFFSET_4OP + AM_VIB + i];
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xinstr->op[i+2].ksl_level = sbi.operators[OFFSET_4OP + KSL_LEVEL + i];
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xinstr->op[i+2].attack_decay = sbi.operators[OFFSET_4OP + ATTACK_DECAY + i];
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xinstr->op[i+2].sustain_release = sbi.operators[OFFSET_4OP + SUSTAIN_RELEASE + i];
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xinstr->op[i+2].wave_select = sbi.operators[OFFSET_4OP + WAVE_SELECT + i];
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}
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xinstr->feedback_connection[1] = sbi.operators[OFFSET_4OP + CONNECTION];
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} else {
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xinstr->type = FM_PATCH_OPL2;
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}
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put->id.instr.std = SNDRV_SEQ_INSTR_TYPE2_OPL2_3;
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put->id.instr.bank = 127;
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put->id.instr.prg = sbi.channel;
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put->cmd = SNDRV_SEQ_INSTR_PUT_CMD_CREATE;
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memset (&ev, 0, sizeof(ev));
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ev.source.client = SNDRV_SEQ_CLIENT_OSS;
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ev.dest = arg->addr;
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ev.flags = SNDRV_SEQ_EVENT_LENGTH_VARUSR;
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ev.queue = SNDRV_SEQ_QUEUE_DIRECT;
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fs = snd_enter_user();
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__again:
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ev.type = SNDRV_SEQ_EVENT_INSTR_PUT;
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ev.data.ext.len = size;
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ev.data.ext.ptr = put;
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err = snd_seq_instr_event(&opl3->fm_ops, opl3->ilist, &ev,
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opl3->seq_client, 0, 0);
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if (err == -EBUSY) {
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snd_seq_instr_header_t remove;
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memset (&remove, 0, sizeof(remove));
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remove.cmd = SNDRV_SEQ_INSTR_FREE_CMD_SINGLE;
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remove.id.instr = put->id.instr;
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/* remove instrument */
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ev.type = SNDRV_SEQ_EVENT_INSTR_FREE;
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ev.data.ext.len = sizeof(remove);
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ev.data.ext.ptr = &remove;
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snd_seq_instr_event(&opl3->fm_ops, opl3->ilist, &ev,
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opl3->seq_client, 0, 0);
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goto __again;
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}
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snd_leave_user(fs);
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kfree(put);
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}
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return err;
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}
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/* ioctl */
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static int snd_opl3_ioctl_seq_oss(snd_seq_oss_arg_t *arg, unsigned int cmd,
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unsigned long ioarg)
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{
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opl3_t *opl3;
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snd_assert(arg != NULL, 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("OPL3: Obsolete ioctl(SNDCTL_FM_LOAD_INSTR) used. 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(snd_seq_oss_arg_t *arg)
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{
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opl3_t *opl3;
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snd_assert(arg != NULL, return -ENXIO);
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opl3 = arg->private_data;
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return 0;
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}
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