491 lines
11 KiB
C
491 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Interface for OSS sequencer emulation
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*
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* Copyright (C) 1999 Takashi Iwai <tiwai@suse.de>
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*
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* Changes
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* 19990227 Steve Ratcliffe Made separate file and merged in latest
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* midi emulation.
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*/
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#include <linux/export.h>
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#include <linux/uaccess.h>
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#include <sound/core.h>
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#include "emux_voice.h"
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#include <sound/asoundef.h>
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static int snd_emux_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure);
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static int snd_emux_close_seq_oss(struct snd_seq_oss_arg *arg);
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static int snd_emux_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd,
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unsigned long ioarg);
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static int snd_emux_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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static int snd_emux_reset_seq_oss(struct snd_seq_oss_arg *arg);
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static int snd_emux_event_oss_input(struct snd_seq_event *ev, int direct,
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void *private, int atomic, int hop);
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static void reset_port_mode(struct snd_emux_port *port, int midi_mode);
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static void emuspec_control(struct snd_emux *emu, struct snd_emux_port *port,
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int cmd, unsigned char *event, int atomic, int hop);
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static void gusspec_control(struct snd_emux *emu, struct snd_emux_port *port,
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int cmd, unsigned char *event, int atomic, int hop);
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static void fake_event(struct snd_emux *emu, struct snd_emux_port *port,
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int ch, int param, int val, int atomic, int hop);
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/* operators */
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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_emux_open_seq_oss,
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.close = snd_emux_close_seq_oss,
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.ioctl = snd_emux_ioctl_seq_oss,
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.load_patch = snd_emux_load_patch_seq_oss,
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.reset = snd_emux_reset_seq_oss,
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};
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/*
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* register OSS synth
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*/
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void
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snd_emux_init_seq_oss(struct snd_emux *emu)
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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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/* using device#1 here for avoiding conflicts with OPL3 */
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if (snd_seq_device_new(emu->card, 1, 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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emu->oss_synth = dev;
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strcpy(dev->name, emu->name);
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arg = SNDRV_SEQ_DEVICE_ARGPTR(dev);
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arg->type = SYNTH_TYPE_SAMPLE;
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arg->subtype = SAMPLE_TYPE_AWE32;
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arg->nvoices = emu->max_voices;
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arg->oper = oss_callback;
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arg->private_data = emu;
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/* register to OSS synth table */
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snd_device_register(emu->card, dev);
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}
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/*
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* unregister
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*/
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void
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snd_emux_detach_seq_oss(struct snd_emux *emu)
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{
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if (emu->oss_synth) {
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snd_device_free(emu->card, emu->oss_synth);
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emu->oss_synth = NULL;
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}
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}
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/* use port number as a unique soundfont client number */
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#define SF_CLIENT_NO(p) ((p) + 0x1000)
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/*
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* open port for OSS sequencer
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*/
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static int
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snd_emux_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure)
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{
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struct snd_emux *emu;
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struct snd_emux_port *p;
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struct snd_seq_port_callback callback;
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char tmpname[64];
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emu = closure;
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if (snd_BUG_ON(!arg || !emu))
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return -ENXIO;
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if (!snd_emux_inc_count(emu))
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return -EFAULT;
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memset(&callback, 0, sizeof(callback));
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callback.owner = THIS_MODULE;
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callback.event_input = snd_emux_event_oss_input;
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sprintf(tmpname, "%s OSS Port", emu->name);
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p = snd_emux_create_port(emu, tmpname, 32,
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1, &callback);
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if (p == NULL) {
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snd_printk(KERN_ERR "can't create port\n");
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snd_emux_dec_count(emu);
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return -ENOMEM;
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}
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/* fill the argument data */
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arg->private_data = p;
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arg->addr.client = p->chset.client;
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arg->addr.port = p->chset.port;
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p->oss_arg = arg;
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reset_port_mode(p, arg->seq_mode);
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snd_emux_reset_port(p);
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return 0;
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}
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#define DEFAULT_DRUM_FLAGS ((1<<9) | (1<<25))
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/*
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* reset port mode
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*/
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static void
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reset_port_mode(struct snd_emux_port *port, int midi_mode)
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{
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if (midi_mode) {
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port->port_mode = SNDRV_EMUX_PORT_MODE_OSS_MIDI;
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port->drum_flags = DEFAULT_DRUM_FLAGS;
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port->volume_atten = 0;
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port->oss_arg->event_passing = SNDRV_SEQ_OSS_PROCESS_KEYPRESS;
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} else {
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port->port_mode = SNDRV_EMUX_PORT_MODE_OSS_SYNTH;
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port->drum_flags = 0;
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port->volume_atten = 32;
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port->oss_arg->event_passing = SNDRV_SEQ_OSS_PROCESS_EVENTS;
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}
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}
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/*
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* close port
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*/
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static int
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snd_emux_close_seq_oss(struct snd_seq_oss_arg *arg)
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{
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struct snd_emux *emu;
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struct snd_emux_port *p;
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if (snd_BUG_ON(!arg))
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return -ENXIO;
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p = arg->private_data;
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if (snd_BUG_ON(!p))
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return -ENXIO;
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emu = p->emu;
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if (snd_BUG_ON(!emu))
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return -ENXIO;
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snd_emux_sounds_off_all(p);
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snd_soundfont_close_check(emu->sflist, SF_CLIENT_NO(p->chset.port));
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snd_seq_event_port_detach(p->chset.client, p->chset.port);
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snd_emux_dec_count(emu);
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return 0;
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}
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/*
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* load patch
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*/
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static int
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snd_emux_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_emux *emu;
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struct snd_emux_port *p;
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int rc;
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if (snd_BUG_ON(!arg))
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return -ENXIO;
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p = arg->private_data;
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if (snd_BUG_ON(!p))
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return -ENXIO;
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emu = p->emu;
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if (snd_BUG_ON(!emu))
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return -ENXIO;
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if (format == GUS_PATCH)
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rc = snd_soundfont_load_guspatch(emu->sflist, buf, count,
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SF_CLIENT_NO(p->chset.port));
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else if (format == SNDRV_OSS_SOUNDFONT_PATCH) {
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struct soundfont_patch_info patch;
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if (count < (int)sizeof(patch))
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return -EINVAL;
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if (copy_from_user(&patch, buf, sizeof(patch)))
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return -EFAULT;
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if (patch.type >= SNDRV_SFNT_LOAD_INFO &&
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patch.type <= SNDRV_SFNT_PROBE_DATA)
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rc = snd_soundfont_load(emu->sflist, buf, count, SF_CLIENT_NO(p->chset.port));
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else {
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if (emu->ops.load_fx)
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rc = emu->ops.load_fx(emu, patch.type, patch.optarg, buf, count);
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else
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rc = -EINVAL;
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}
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} else
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rc = 0;
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return rc;
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}
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/*
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* ioctl
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*/
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static int
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snd_emux_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd, unsigned long ioarg)
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{
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struct snd_emux_port *p;
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struct snd_emux *emu;
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if (snd_BUG_ON(!arg))
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return -ENXIO;
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p = arg->private_data;
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if (snd_BUG_ON(!p))
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return -ENXIO;
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emu = p->emu;
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if (snd_BUG_ON(!emu))
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return -ENXIO;
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switch (cmd) {
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case SNDCTL_SEQ_RESETSAMPLES:
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snd_soundfont_remove_samples(emu->sflist);
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return 0;
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case SNDCTL_SYNTH_MEMAVL:
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if (emu->memhdr)
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return snd_util_mem_avail(emu->memhdr);
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return 0;
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}
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return 0;
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}
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/*
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* reset device
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*/
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static int
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snd_emux_reset_seq_oss(struct snd_seq_oss_arg *arg)
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{
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struct snd_emux_port *p;
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if (snd_BUG_ON(!arg))
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return -ENXIO;
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p = arg->private_data;
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if (snd_BUG_ON(!p))
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return -ENXIO;
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snd_emux_reset_port(p);
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return 0;
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}
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/*
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* receive raw events: only SEQ_PRIVATE is accepted.
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*/
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static int
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snd_emux_event_oss_input(struct snd_seq_event *ev, int direct, void *private_data,
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int atomic, int hop)
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{
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struct snd_emux *emu;
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struct snd_emux_port *p;
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unsigned char cmd, *data;
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p = private_data;
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if (snd_BUG_ON(!p))
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return -EINVAL;
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emu = p->emu;
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if (snd_BUG_ON(!emu))
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return -EINVAL;
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if (ev->type != SNDRV_SEQ_EVENT_OSS)
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return snd_emux_event_input(ev, direct, private_data, atomic, hop);
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data = ev->data.raw8.d;
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/* only SEQ_PRIVATE is accepted */
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if (data[0] != 0xfe)
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return 0;
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cmd = data[2] & _EMUX_OSS_MODE_VALUE_MASK;
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if (data[2] & _EMUX_OSS_MODE_FLAG)
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emuspec_control(emu, p, cmd, data, atomic, hop);
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else
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gusspec_control(emu, p, cmd, data, atomic, hop);
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return 0;
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}
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/*
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* OSS/AWE driver specific h/w controls
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*/
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static void
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emuspec_control(struct snd_emux *emu, struct snd_emux_port *port, int cmd,
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unsigned char *event, int atomic, int hop)
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{
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int voice;
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unsigned short p1;
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short p2;
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int i;
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struct snd_midi_channel *chan;
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voice = event[3];
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if (voice < 0 || voice >= port->chset.max_channels)
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chan = NULL;
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else
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chan = &port->chset.channels[voice];
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p1 = *(unsigned short *) &event[4];
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p2 = *(short *) &event[6];
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switch (cmd) {
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#if 0 /* don't do this atomically */
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case _EMUX_OSS_REMOVE_LAST_SAMPLES:
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snd_soundfont_remove_unlocked(emu->sflist);
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break;
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#endif
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case _EMUX_OSS_SEND_EFFECT:
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if (chan)
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snd_emux_send_effect_oss(port, chan, p1, p2);
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break;
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case _EMUX_OSS_TERMINATE_ALL:
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snd_emux_terminate_all(emu);
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break;
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case _EMUX_OSS_TERMINATE_CHANNEL:
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/*snd_emux_mute_channel(emu, chan);*/
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break;
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case _EMUX_OSS_RESET_CHANNEL:
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/*snd_emux_channel_init(chset, chan);*/
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break;
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case _EMUX_OSS_RELEASE_ALL:
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fake_event(emu, port, voice, MIDI_CTL_ALL_NOTES_OFF, 0, atomic, hop);
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break;
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case _EMUX_OSS_NOTEOFF_ALL:
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fake_event(emu, port, voice, MIDI_CTL_ALL_SOUNDS_OFF, 0, atomic, hop);
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break;
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case _EMUX_OSS_INITIAL_VOLUME:
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if (p2) {
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port->volume_atten = (short)p1;
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snd_emux_update_port(port, SNDRV_EMUX_UPDATE_VOLUME);
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}
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break;
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case _EMUX_OSS_CHN_PRESSURE:
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if (chan) {
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chan->midi_pressure = p1;
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snd_emux_update_channel(port, chan, SNDRV_EMUX_UPDATE_FMMOD|SNDRV_EMUX_UPDATE_FM2FRQ2);
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}
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break;
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case _EMUX_OSS_CHANNEL_MODE:
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reset_port_mode(port, p1);
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snd_emux_reset_port(port);
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break;
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case _EMUX_OSS_DRUM_CHANNELS:
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port->drum_flags = *(unsigned int*)&event[4];
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for (i = 0; i < port->chset.max_channels; i++) {
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chan = &port->chset.channels[i];
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chan->drum_channel = ((port->drum_flags >> i) & 1) ? 1 : 0;
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}
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break;
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case _EMUX_OSS_MISC_MODE:
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if (p1 < EMUX_MD_END)
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port->ctrls[p1] = p2;
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break;
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case _EMUX_OSS_DEBUG_MODE:
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break;
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default:
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if (emu->ops.oss_ioctl)
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emu->ops.oss_ioctl(emu, cmd, p1, p2);
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break;
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}
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}
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/*
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* GUS specific h/w controls
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*/
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#include <linux/ultrasound.h>
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static void
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gusspec_control(struct snd_emux *emu, struct snd_emux_port *port, int cmd,
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unsigned char *event, int atomic, int hop)
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{
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int voice;
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unsigned short p1;
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int plong;
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struct snd_midi_channel *chan;
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if (port->port_mode != SNDRV_EMUX_PORT_MODE_OSS_SYNTH)
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return;
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if (cmd == _GUS_NUMVOICES)
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return;
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voice = event[3];
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if (voice < 0 || voice >= port->chset.max_channels)
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return;
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chan = &port->chset.channels[voice];
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p1 = *(unsigned short *) &event[4];
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plong = *(int*) &event[4];
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switch (cmd) {
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case _GUS_VOICESAMPLE:
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chan->midi_program = p1;
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return;
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case _GUS_VOICEBALA:
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/* 0 to 15 --> 0 to 127 */
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chan->control[MIDI_CTL_MSB_PAN] = (int)p1 << 3;
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snd_emux_update_channel(port, chan, SNDRV_EMUX_UPDATE_PAN);
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return;
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case _GUS_VOICEVOL:
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case _GUS_VOICEVOL2:
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/* not supported yet */
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return;
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case _GUS_RAMPRANGE:
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case _GUS_RAMPRATE:
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case _GUS_RAMPMODE:
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case _GUS_RAMPON:
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case _GUS_RAMPOFF:
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/* volume ramping not supported */
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return;
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case _GUS_VOLUME_SCALE:
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return;
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case _GUS_VOICE_POS:
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#ifdef SNDRV_EMUX_USE_RAW_EFFECT
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snd_emux_send_effect(port, chan, EMUX_FX_SAMPLE_START,
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(short)(plong & 0x7fff),
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EMUX_FX_FLAG_SET);
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snd_emux_send_effect(port, chan, EMUX_FX_COARSE_SAMPLE_START,
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(plong >> 15) & 0xffff,
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EMUX_FX_FLAG_SET);
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#endif
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return;
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}
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}
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/*
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* send an event to midi emulation
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*/
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static void
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fake_event(struct snd_emux *emu, struct snd_emux_port *port, int ch, int param, int val, int atomic, int hop)
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{
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struct snd_seq_event ev;
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memset(&ev, 0, sizeof(ev));
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ev.type = SNDRV_SEQ_EVENT_CONTROLLER;
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ev.data.control.channel = ch;
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ev.data.control.param = param;
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ev.data.control.value = val;
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snd_emux_event_input(&ev, 0, port, atomic, hop);
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}
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