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