1 files changed, 659 insertions, 0 deletions

diff --git a/sound/core/seq/oss/seq_oss_synth.c b/sound/core/seq/oss/seq_oss_synth.c
new file mode 100644
index 000000000000..638cc148706d
--- /dev/null
+++ b/sound/core/seq/oss/seq_oss_synth.c
@@ -0,0 +1,659 @@
+/*
+ * OSS compatible sequencer driver
+ *
+ * synth device handlers
+ *
+ * Copyright (C) 1998,99 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
+ */
+
+#include "seq_oss_synth.h"
+#include "seq_oss_midi.h"
+#include "../seq_lock.h"
+#include <linux/init.h>
+
+/*
+ * constants
+ */
+#define SNDRV_SEQ_OSS_MAX_SYNTH_NAME	30
+#define MAX_SYSEX_BUFLEN		128
+
+
+/*
+ * definition of synth info records
+ */
+
+/* sysex buffer */
+struct seq_oss_synth_sysex_t {
+	int len;
+	int skip;
+	unsigned char buf[MAX_SYSEX_BUFLEN];
+};
+
+/* synth info */
+struct seq_oss_synth_t {
+	int seq_device;
+
+	/* for synth_info */
+	int synth_type;
+	int synth_subtype;
+	int nr_voices;
+
+	char name[SNDRV_SEQ_OSS_MAX_SYNTH_NAME];
+	snd_seq_oss_callback_t oper;
+
+	int opened;
+
+	void *private_data;
+	snd_use_lock_t use_lock;
+};
+
+
+/*
+ * device table
+ */
+static int max_synth_devs;
+static seq_oss_synth_t *synth_devs[SNDRV_SEQ_OSS_MAX_SYNTH_DEVS];
+static seq_oss_synth_t midi_synth_dev = {
+	-1, /* seq_device */
+	SYNTH_TYPE_MIDI, /* synth_type */
+	0, /* synth_subtype */
+	16, /* nr_voices */
+	"MIDI", /* name */
+};
+
+static DEFINE_SPINLOCK(register_lock);
+
+/*
+ * prototypes
+ */
+static seq_oss_synth_t *get_synthdev(seq_oss_devinfo_t *dp, int dev);
+static void reset_channels(seq_oss_synthinfo_t *info);
+
+/*
+ * global initialization
+ */
+void __init
+snd_seq_oss_synth_init(void)
+{
+	snd_use_lock_init(&midi_synth_dev.use_lock);
+}
+
+/*
+ * registration of the synth device
+ */
+int
+snd_seq_oss_synth_register(snd_seq_device_t *dev)
+{
+	int i;
+	seq_oss_synth_t *rec;
+	snd_seq_oss_reg_t *reg = SNDRV_SEQ_DEVICE_ARGPTR(dev);
+	unsigned long flags;
+
+	if ((rec = kcalloc(1, sizeof(*rec), GFP_KERNEL)) == NULL) {
+		snd_printk(KERN_ERR "can't malloc synth info\n");
+		return -ENOMEM;
+	}
+	rec->seq_device = -1;
+	rec->synth_type = reg->type;
+	rec->synth_subtype = reg->subtype;
+	rec->nr_voices = reg->nvoices;
+	rec->oper = reg->oper;
+	rec->private_data = reg->private_data;
+	rec->opened = 0;
+	snd_use_lock_init(&rec->use_lock);
+
+	/* copy and truncate the name of synth device */
+	strlcpy(rec->name, dev->name, sizeof(rec->name));
+
+	/* registration */
+	spin_lock_irqsave(&register_lock, flags);
+	for (i = 0; i < max_synth_devs; i++) {
+		if (synth_devs[i] == NULL)
+			break;
+	}
+	if (i >= max_synth_devs) {
+		if (max_synth_devs >= SNDRV_SEQ_OSS_MAX_SYNTH_DEVS) {
+			spin_unlock_irqrestore(&register_lock, flags);
+			snd_printk(KERN_ERR "no more synth slot\n");
+			kfree(rec);
+			return -ENOMEM;
+		}
+		max_synth_devs++;
+	}
+	rec->seq_device = i;
+	synth_devs[i] = rec;
+	debug_printk(("synth %s registered %d\n", rec->name, i));
+	spin_unlock_irqrestore(&register_lock, flags);
+	dev->driver_data = rec;
+#ifdef SNDRV_OSS_INFO_DEV_SYNTH
+	if (i < SNDRV_CARDS)
+		snd_oss_info_register(SNDRV_OSS_INFO_DEV_SYNTH, i, rec->name);
+#endif
+	return 0;
+}
+
+
+int
+snd_seq_oss_synth_unregister(snd_seq_device_t *dev)
+{
+	int index;
+	seq_oss_synth_t *rec = dev->driver_data;
+	unsigned long flags;
+
+	spin_lock_irqsave(&register_lock, flags);
+	for (index = 0; index < max_synth_devs; index++) {
+		if (synth_devs[index] == rec)
+			break;
+	}
+	if (index >= max_synth_devs) {
+		spin_unlock_irqrestore(&register_lock, flags);
+		snd_printk(KERN_ERR "can't unregister synth\n");
+		return -EINVAL;
+	}
+	synth_devs[index] = NULL;
+	if (index == max_synth_devs - 1) {
+		for (index--; index >= 0; index--) {
+			if (synth_devs[index])
+				break;
+		}
+		max_synth_devs = index + 1;
+	}
+	spin_unlock_irqrestore(&register_lock, flags);
+#ifdef SNDRV_OSS_INFO_DEV_SYNTH
+	if (rec->seq_device < SNDRV_CARDS)
+		snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_SYNTH, rec->seq_device);
+#endif
+
+	snd_use_lock_sync(&rec->use_lock);
+	kfree(rec);
+
+	return 0;
+}
+
+
+/*
+ */
+static seq_oss_synth_t *
+get_sdev(int dev)
+{
+	seq_oss_synth_t *rec;
+	unsigned long flags;
+
+	spin_lock_irqsave(&register_lock, flags);
+	rec = synth_devs[dev];
+	if (rec)
+		snd_use_lock_use(&rec->use_lock);
+	spin_unlock_irqrestore(&register_lock, flags);
+	return rec;
+}
+
+
+/*
+ * set up synth tables
+ */
+
+void
+snd_seq_oss_synth_setup(seq_oss_devinfo_t *dp)
+{
+	int i;
+	seq_oss_synth_t *rec;
+	seq_oss_synthinfo_t *info;
+
+	dp->max_synthdev = max_synth_devs;
+	dp->synth_opened = 0;
+	memset(dp->synths, 0, sizeof(dp->synths));
+	for (i = 0; i < dp->max_synthdev; i++) {
+		rec = get_sdev(i);
+		if (rec == NULL)
+			continue;
+		if (rec->oper.open == NULL || rec->oper.close == NULL) {
+			snd_use_lock_free(&rec->use_lock);
+			continue;
+		}
+		info = &dp->synths[i];
+		info->arg.app_index = dp->port;
+		info->arg.file_mode = dp->file_mode;
+		info->arg.seq_mode = dp->seq_mode;
+		if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_SYNTH)
+			info->arg.event_passing = SNDRV_SEQ_OSS_PROCESS_EVENTS;
+		else
+			info->arg.event_passing = SNDRV_SEQ_OSS_PASS_EVENTS;
+		info->opened = 0;
+		if (!try_module_get(rec->oper.owner)) {
+			snd_use_lock_free(&rec->use_lock);
+			continue;
+		}
+		if (rec->oper.open(&info->arg, rec->private_data) < 0) {
+			module_put(rec->oper.owner);
+			snd_use_lock_free(&rec->use_lock);
+			continue;
+		}
+		info->nr_voices = rec->nr_voices;
+		if (info->nr_voices > 0) {
+			info->ch = kcalloc(info->nr_voices, sizeof(seq_oss_chinfo_t), GFP_KERNEL);
+			if (!info->ch)
+				BUG();
+			reset_channels(info);
+		}
+		debug_printk(("synth %d assigned\n", i));
+		info->opened++;
+		rec->opened++;
+		dp->synth_opened++;
+		snd_use_lock_free(&rec->use_lock);
+	}
+}
+
+
+/*
+ * set up synth tables for MIDI emulation - /dev/music mode only
+ */
+
+void
+snd_seq_oss_synth_setup_midi(seq_oss_devinfo_t *dp)
+{
+	int i;
+
+	if (dp->max_synthdev >= SNDRV_SEQ_OSS_MAX_SYNTH_DEVS)
+		return;
+
+	for (i = 0; i < dp->max_mididev; i++) {
+		seq_oss_synthinfo_t *info;
+		info = &dp->synths[dp->max_synthdev];
+		if (snd_seq_oss_midi_open(dp, i, dp->file_mode) < 0)
+			continue;
+		info->arg.app_index = dp->port;
+		info->arg.file_mode = dp->file_mode;
+		info->arg.seq_mode = dp->seq_mode;
+		info->arg.private_data = info;
+		info->is_midi = 1;
+		info->midi_mapped = i;
+		info->arg.event_passing = SNDRV_SEQ_OSS_PASS_EVENTS;
+		snd_seq_oss_midi_get_addr(dp, i, &info->arg.addr);
+		info->opened = 1;
+		midi_synth_dev.opened++;
+		dp->max_synthdev++;
+		if (dp->max_synthdev >= SNDRV_SEQ_OSS_MAX_SYNTH_DEVS)
+			break;
+	}
+}
+
+
+/*
+ * clean up synth tables
+ */
+
+void
+snd_seq_oss_synth_cleanup(seq_oss_devinfo_t *dp)
+{
+	int i;
+	seq_oss_synth_t *rec;
+	seq_oss_synthinfo_t *info;
+
+	snd_assert(dp->max_synthdev <= SNDRV_SEQ_OSS_MAX_SYNTH_DEVS, return);
+	for (i = 0; i < dp->max_synthdev; i++) {
+		info = &dp->synths[i];
+		if (! info->opened)
+			continue;
+		if (info->is_midi) {
+			if (midi_synth_dev.opened > 0) {
+				snd_seq_oss_midi_close(dp, info->midi_mapped);
+				midi_synth_dev.opened--;
+			}
+		} else {
+			rec = get_sdev(i);
+			if (rec == NULL)
+				continue;
+			if (rec->opened > 0) {
+				debug_printk(("synth %d closed\n", i));
+				rec->oper.close(&info->arg);
+				module_put(rec->oper.owner);
+				rec->opened = 0;
+			}
+			snd_use_lock_free(&rec->use_lock);
+		}
+		if (info->sysex) {
+			kfree(info->sysex);
+			info->sysex = NULL;
+		}
+		if (info->ch) {
+			kfree(info->ch);
+			info->ch = NULL;
+		}
+	}
+	dp->synth_opened = 0;
+	dp->max_synthdev = 0;
+}
+
+/*
+ * check if the specified device is MIDI mapped device
+ */
+static int
+is_midi_dev(seq_oss_devinfo_t *dp, int dev)
+{
+	if (dev < 0 || dev >= dp->max_synthdev)
+		return 0;
+	if (dp->synths[dev].is_midi)
+		return 1;
+	return 0;
+}
+
+/*
+ * return synth device information pointer
+ */
+static seq_oss_synth_t *
+get_synthdev(seq_oss_devinfo_t *dp, int dev)
+{
+	seq_oss_synth_t *rec;
+	if (dev < 0 || dev >= dp->max_synthdev)
+		return NULL;
+	if (! dp->synths[dev].opened)
+		return NULL;
+	if (dp->synths[dev].is_midi)
+		return &midi_synth_dev;
+	if ((rec = get_sdev(dev)) == NULL)
+		return NULL;
+	if (! rec->opened) {
+		snd_use_lock_free(&rec->use_lock);
+		return NULL;
+	}
+	return rec;
+}
+
+
+/*
+ * reset note and velocity on each channel.
+ */
+static void
+reset_channels(seq_oss_synthinfo_t *info)
+{
+	int i;
+	if (info->ch == NULL || ! info->nr_voices)
+		return;
+	for (i = 0; i < info->nr_voices; i++) {
+		info->ch[i].note = -1;
+		info->ch[i].vel = 0;
+	}
+}
+
+
+/*
+ * reset synth device:
+ * call reset callback.  if no callback is defined, send a heartbeat
+ * event to the corresponding port.
+ */
+void
+snd_seq_oss_synth_reset(seq_oss_devinfo_t *dp, int dev)
+{
+	seq_oss_synth_t *rec;
+	seq_oss_synthinfo_t *info;
+
+	snd_assert(dev >= 0 && dev < dp->max_synthdev, return);
+	info = &dp->synths[dev];
+	if (! info->opened)
+		return;
+	if (info->sysex)
+		info->sysex->len = 0; /* reset sysex */
+	reset_channels(info);
+	if (info->is_midi) {
+		if (midi_synth_dev.opened <= 0)
+			return;
+		snd_seq_oss_midi_reset(dp, info->midi_mapped);
+		/* reopen the device */
+		snd_seq_oss_midi_close(dp, dev);
+		if (snd_seq_oss_midi_open(dp, info->midi_mapped,
+					  dp->file_mode) < 0) {
+			midi_synth_dev.opened--;
+			info->opened = 0;
+			if (info->sysex) {
+				kfree(info->sysex);
+				info->sysex = NULL;
+			}
+			if (info->ch) {
+				kfree(info->ch);
+				info->ch = NULL;
+			}
+		}
+		return;
+	}
+
+	rec = get_sdev(dev);
+	if (rec == NULL)
+		return;
+	if (rec->oper.reset) {
+		rec->oper.reset(&info->arg);
+	} else {
+		snd_seq_event_t ev;
+		memset(&ev, 0, sizeof(ev));
+		snd_seq_oss_fill_addr(dp, &ev, info->arg.addr.client,
+				      info->arg.addr.port);
+		ev.type = SNDRV_SEQ_EVENT_RESET;
+		snd_seq_oss_dispatch(dp, &ev, 0, 0);
+	}
+	snd_use_lock_free(&rec->use_lock);
+}
+
+
+/*
+ * load a patch record:
+ * call load_patch callback function
+ */
+int
+snd_seq_oss_synth_load_patch(seq_oss_devinfo_t *dp, int dev, int fmt,
+			    const char __user *buf, int p, int c)
+{
+	seq_oss_synth_t *rec;
+	int rc;
+
+	if (dev < 0 || dev >= dp->max_synthdev)
+		return -ENXIO;
+
+	if (is_midi_dev(dp, dev))
+		return 0;
+	if ((rec = get_synthdev(dp, dev)) == NULL)
+		return -ENXIO;
+
+	if (rec->oper.load_patch == NULL)
+		rc = -ENXIO;
+	else
+		rc = rec->oper.load_patch(&dp->synths[dev].arg, fmt, buf, p, c);
+	snd_use_lock_free(&rec->use_lock);
+	return rc;
+}
+
+/*
+ * check if the device is valid synth device
+ */
+int
+snd_seq_oss_synth_is_valid(seq_oss_devinfo_t *dp, int dev)
+{
+	seq_oss_synth_t *rec;
+	rec = get_synthdev(dp, dev);
+	if (rec) {
+		snd_use_lock_free(&rec->use_lock);
+		return 1;
+	}
+	return 0;
+}
+
+
+/*
+ * receive OSS 6 byte sysex packet:
+ * the full sysex message will be sent if it reaches to the end of data
+ * (0xff).
+ */
+int
+snd_seq_oss_synth_sysex(seq_oss_devinfo_t *dp, int dev, unsigned char *buf, snd_seq_event_t *ev)
+{
+	int i, send;
+	unsigned char *dest;
+	seq_oss_synth_sysex_t *sysex;
+
+	if (! snd_seq_oss_synth_is_valid(dp, dev))
+		return -ENXIO;
+
+	sysex = dp->synths[dev].sysex;
+	if (sysex == NULL) {
+		sysex = kcalloc(1, sizeof(*sysex), GFP_KERNEL);
+		if (sysex == NULL)
+			return -ENOMEM;
+		dp->synths[dev].sysex = sysex;
+	}
+
+	send = 0;
+	dest = sysex->buf + sysex->len;
+	/* copy 6 byte packet to the buffer */
+	for (i = 0; i < 6; i++) {
+		if (buf[i] == 0xff) {
+			send = 1;
+			break;
+		}
+		dest[i] = buf[i];
+		sysex->len++;
+		if (sysex->len >= MAX_SYSEX_BUFLEN) {
+			sysex->len = 0;
+			sysex->skip = 1;
+			break;
+		}
+	}
+
+	if (sysex->len && send) {
+		if (sysex->skip) {
+			sysex->skip = 0;
+			sysex->len = 0;
+			return -EINVAL; /* skip */
+		}
+		/* copy the data to event record and send it */
+		ev->flags = SNDRV_SEQ_EVENT_LENGTH_VARIABLE;
+		if (snd_seq_oss_synth_addr(dp, dev, ev))
+			return -EINVAL;
+		ev->data.ext.len = sysex->len;
+		ev->data.ext.ptr = sysex->buf;
+		sysex->len = 0;
+		return 0;
+	}
+
+	return -EINVAL; /* skip */
+}
+
+/*
+ * fill the event source/destination addresses
+ */
+int
+snd_seq_oss_synth_addr(seq_oss_devinfo_t *dp, int dev, snd_seq_event_t *ev)
+{
+	if (! snd_seq_oss_synth_is_valid(dp, dev))
+		return -EINVAL;
+	snd_seq_oss_fill_addr(dp, ev, dp->synths[dev].arg.addr.client,
+			      dp->synths[dev].arg.addr.port);
+	return 0;
+}
+
+
+/*
+ * OSS compatible ioctl
+ */
+int
+snd_seq_oss_synth_ioctl(seq_oss_devinfo_t *dp, int dev, unsigned int cmd, unsigned long addr)
+{
+	seq_oss_synth_t *rec;
+	int rc;
+
+	if (is_midi_dev(dp, dev))
+		return -ENXIO;
+	if ((rec = get_synthdev(dp, dev)) == NULL)
+		return -ENXIO;
+	if (rec->oper.ioctl == NULL)
+		rc = -ENXIO;
+	else
+		rc = rec->oper.ioctl(&dp->synths[dev].arg, cmd, addr);
+	snd_use_lock_free(&rec->use_lock);
+	return rc;
+}
+
+
+/*
+ * send OSS raw events - SEQ_PRIVATE and SEQ_VOLUME
+ */
+int
+snd_seq_oss_synth_raw_event(seq_oss_devinfo_t *dp, int dev, unsigned char *data, snd_seq_event_t *ev)
+{
+	if (! snd_seq_oss_synth_is_valid(dp, dev) || is_midi_dev(dp, dev))
+		return -ENXIO;
+	ev->type = SNDRV_SEQ_EVENT_OSS;
+	memcpy(ev->data.raw8.d, data, 8);
+	return snd_seq_oss_synth_addr(dp, dev, ev);
+}
+
+
+/*
+ * create OSS compatible synth_info record
+ */
+int
+snd_seq_oss_synth_make_info(seq_oss_devinfo_t *dp, int dev, struct synth_info *inf)
+{
+	seq_oss_synth_t *rec;
+
+	if (dp->synths[dev].is_midi) {
+		struct midi_info minf;
+		snd_seq_oss_midi_make_info(dp, dp->synths[dev].midi_mapped, &minf);
+		inf->synth_type = SYNTH_TYPE_MIDI;
+		inf->synth_subtype = 0;
+		inf->nr_voices = 16;
+		inf->device = dev;
+		strlcpy(inf->name, minf.name, sizeof(inf->name));
+	} else {
+		if ((rec = get_synthdev(dp, dev)) == NULL)
+			return -ENXIO;
+		inf->synth_type = rec->synth_type;
+		inf->synth_subtype = rec->synth_subtype;
+		inf->nr_voices = rec->nr_voices;
+		inf->device = dev;
+		strlcpy(inf->name, rec->name, sizeof(inf->name));
+		snd_use_lock_free(&rec->use_lock);
+	}
+	return 0;
+}
+
+
+/*
+ * proc interface
+ */
+void
+snd_seq_oss_synth_info_read(snd_info_buffer_t *buf)
+{
+	int i;
+	seq_oss_synth_t *rec;
+
+	snd_iprintf(buf, "\nNumber of synth devices: %d\n", max_synth_devs);
+	for (i = 0; i < max_synth_devs; i++) {
+		snd_iprintf(buf, "\nsynth %d: ", i);
+		rec = get_sdev(i);
+		if (rec == NULL) {
+			snd_iprintf(buf, "*empty*\n");
+			continue;
+		}
+		snd_iprintf(buf, "[%s]\n", rec->name);
+		snd_iprintf(buf, "  type 0x%x : subtype 0x%x : voices %d\n",
+			    rec->synth_type, rec->synth_subtype,
+			    rec->nr_voices);
+		snd_iprintf(buf, "  capabilities : ioctl %s / load_patch %s\n",
+			    enabled_str((long)rec->oper.ioctl),
+			    enabled_str((long)rec->oper.load_patch));
+		snd_use_lock_free(&rec->use_lock);
+	}
+}
+