1 files changed, 497 insertions, 0 deletions
diff --git a/sound/synth/emux/emux_oss.c b/sound/synth/emux/emux_oss.c
new file mode 100644
index 00000000000..5272f4ac8af
--- /dev/null
+++ b/sound/synth/emux/emux_oss.c
@@ -0,0 +1,497 @@
+/*
+ *  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.
+ */
+
+#include <sound/driver.h>
+
+#ifdef CONFIG_SND_SEQUENCER_OSS
+
+#include <asm/uaccess.h>
+#include <sound/core.h>
+#include "emux_voice.h"
+#include <sound/asoundef.h>
+
+static int snd_emux_open_seq_oss(snd_seq_oss_arg_t *arg, void *closure);
+static int snd_emux_close_seq_oss(snd_seq_oss_arg_t *arg);
+static int snd_emux_ioctl_seq_oss(snd_seq_oss_arg_t *arg, unsigned int cmd, unsigned long ioarg);
+static int snd_emux_load_patch_seq_oss(snd_seq_oss_arg_t *arg, int format, const char __user *buf, int offs, int count);
+static int snd_emux_reset_seq_oss(snd_seq_oss_arg_t *arg);
+static int snd_emux_event_oss_input(snd_seq_event_t *ev, int direct, void *private, int atomic, int hop);
+static void reset_port_mode(snd_emux_port_t *port, int midi_mode);
+static void emuspec_control(snd_emux_t *emu, snd_emux_port_t *port, int cmd, unsigned char *event, int atomic, int hop);
+static void gusspec_control(snd_emux_t *emu, snd_emux_port_t *port, int cmd, unsigned char *event, int atomic, int hop);
+static void fake_event(snd_emux_t *emu, snd_emux_port_t *port, int ch, int param, int val, int atomic, int hop);
+
+/* operators */
+static snd_seq_oss_callback_t 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(snd_emux_t *emu)
+{
+	snd_seq_oss_reg_t *arg;
+	snd_seq_device_t *dev;
+
+	if (snd_seq_device_new(emu->card, 0, SNDRV_SEQ_DEV_ID_OSS,
+			       sizeof(snd_seq_oss_reg_t), &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(snd_emux_t *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(snd_seq_oss_arg_t *arg, void *closure)
+{
+	snd_emux_t *emu;
+	snd_emux_port_t *p;
+	snd_seq_port_callback_t callback;
+	char tmpname[64];
+
+	emu = closure;
+	snd_assert(arg != NULL && emu != NULL, return -ENXIO);
+
+	down(&emu->register_mutex);
+
+	if (!snd_emux_inc_count(emu)) {
+		up(&emu->register_mutex);
+		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("can't create port\n");
+		snd_emux_dec_count(emu);
+		up(&emu->register_mutex);
+		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);
+
+	up(&emu->register_mutex);
+	return 0;
+}
+
+
+#define DEFAULT_DRUM_FLAGS	((1<<9) | (1<<25))
+
+/*
+ * reset port mode
+ */
+static void
+reset_port_mode(snd_emux_port_t *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(snd_seq_oss_arg_t *arg)
+{
+	snd_emux_t *emu;
+	snd_emux_port_t *p;
+
+	snd_assert(arg != NULL, return -ENXIO);
+	p = arg->private_data;
+	snd_assert(p != NULL, return -ENXIO);
+
+	emu = p->emu;
+	snd_assert(emu != NULL, return -ENXIO);
+
+	down(&emu->register_mutex);
+	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);
+
+	up(&emu->register_mutex);
+	return 0;
+}
+
+
+/*
+ * load patch
+ */
+static int
+snd_emux_load_patch_seq_oss(snd_seq_oss_arg_t *arg, int format,
+			    const char __user *buf, int offs, int count)
+{
+	snd_emux_t *emu;
+	snd_emux_port_t *p;
+	int rc;
+
+	snd_assert(arg != NULL, return -ENXIO);
+	p = arg->private_data;
+	snd_assert(p != NULL, return -ENXIO);
+
+	emu = p->emu;
+	snd_assert(emu != NULL, 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) {
+		soundfont_patch_info_t 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(snd_seq_oss_arg_t *arg, unsigned int cmd, unsigned long ioarg)
+{
+	snd_emux_port_t *p;
+	snd_emux_t *emu;
+
+	snd_assert(arg != NULL, return -ENXIO);
+	p = arg->private_data;
+	snd_assert(p != NULL, return -ENXIO);
+
+	emu = p->emu;
+	snd_assert(emu != NULL, 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(snd_seq_oss_arg_t *arg)
+{
+	snd_emux_port_t *p;
+
+	snd_assert(arg != NULL, return -ENXIO);
+	p = arg->private_data;
+	snd_assert(p != NULL, return -ENXIO);
+	snd_emux_reset_port(p);
+	return 0;
+}
+
+
+/*
+ * receive raw events: only SEQ_PRIVATE is accepted.
+ */
+static int
+snd_emux_event_oss_input(snd_seq_event_t *ev, int direct, void *private_data,
+			 int atomic, int hop)
+{
+	snd_emux_t *emu;
+	snd_emux_port_t *p;
+	unsigned char cmd, *data;
+
+	p = private_data;
+	snd_assert(p != NULL, return -EINVAL);
+	emu = p->emu;
+	snd_assert(emu != NULL, 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(snd_emux_t *emu, snd_emux_port_t *port, int cmd,
+		unsigned char *event, int atomic, int hop)
+{
+	int voice;
+	unsigned short p1;
+	short p2;
+	int i;
+	snd_midi_channel_t *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(snd_emux_t *emu, snd_emux_port_t *port, int cmd,
+		unsigned char *event, int atomic, int hop)
+{
+	int voice;
+	unsigned short p1;
+	short p2;
+	int plong;
+	snd_midi_channel_t *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(snd_emux_t *emu, snd_emux_port_t *port, int ch, int param, int val, int atomic, int hop)
+{
+	snd_seq_event_t 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 */