Initial import

1 files changed, 1661 insertions, 0 deletions

diff --git a/sound/oss/sequencer.c b/sound/oss/sequencer.c
new file mode 100644
index 000000000..f19da4b47
--- /dev/null
+++ b/sound/oss/sequencer.c
@@ -0,0 +1,1661 @@
+/*
+ * sound/oss/sequencer.c
+ *
+ * The sequencer personality manager.
+ */
+/*
+ * Copyright (C) by Hannu Savolainen 1993-1997
+ *
+ * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
+ * Version 2 (June 1991). See the "COPYING" file distributed with this software
+ * for more info.
+ */
+/*
+ * Thomas Sailer   : ioctl code reworked (vmalloc/vfree removed)
+ * Alan Cox	   : reformatted and fixed a pair of null pointer bugs
+ */
+#include <linux/kmod.h>
+#include <linux/spinlock.h>
+#include "sound_config.h"
+
+#include "midi_ctrl.h"
+#include "sleep.h"
+
+static int      sequencer_ok;
+static struct sound_timer_operations *tmr;
+static int      tmr_no = -1;	/* Currently selected timer */
+static int      pending_timer = -1;	/* For timer change operation */
+extern unsigned long seq_time;
+
+static int      obsolete_api_used;
+static DEFINE_SPINLOCK(lock);
+
+/*
+ * Local counts for number of synth and MIDI devices. These are initialized
+ * by the sequencer_open.
+ */
+static int      max_mididev;
+static int      max_synthdev;
+
+/*
+ * The seq_mode gives the operating mode of the sequencer:
+ *      1 = level1 (the default)
+ *      2 = level2 (extended capabilities)
+ */
+
+#define SEQ_1	1
+#define SEQ_2	2
+static int      seq_mode = SEQ_1;
+
+static DECLARE_WAIT_QUEUE_HEAD(seq_sleeper);
+static DECLARE_WAIT_QUEUE_HEAD(midi_sleeper);
+
+static int      midi_opened[MAX_MIDI_DEV];
+
+static int      midi_written[MAX_MIDI_DEV];
+
+static unsigned long prev_input_time;
+static int      prev_event_time;
+
+#include "tuning.h"
+
+#define EV_SZ	8
+#define IEV_SZ	8
+
+static unsigned char *queue;
+static unsigned char *iqueue;
+
+static volatile int qhead, qtail, qlen;
+static volatile int iqhead, iqtail, iqlen;
+static volatile int seq_playing;
+static volatile int sequencer_busy;
+static int      output_threshold;
+static long     pre_event_timeout;
+static unsigned synth_open_mask;
+
+static int      seq_queue(unsigned char *note, char nonblock);
+static void     seq_startplay(void);
+static int      seq_sync(void);
+static void     seq_reset(void);
+
+#if MAX_SYNTH_DEV > 15
+#error Too many synthesizer devices enabled.
+#endif
+
+int sequencer_read(int dev, struct file *file, char __user *buf, int count)
+{
+	int c = count, p = 0;
+	int ev_len;
+	unsigned long flags;
+
+	dev = dev >> 4;
+
+	ev_len = seq_mode == SEQ_1 ? 4 : 8;
+
+	spin_lock_irqsave(&lock,flags);
+
+	if (!iqlen)
+	{
+		spin_unlock_irqrestore(&lock,flags);
+ 		if (file->f_flags & O_NONBLOCK) {
+  			return -EAGAIN;
+  		}
+
+		oss_broken_sleep_on(&midi_sleeper, pre_event_timeout);
+		spin_lock_irqsave(&lock,flags);
+		if (!iqlen)
+		{
+			spin_unlock_irqrestore(&lock,flags);
+			return 0;
+		}
+	}
+	while (iqlen && c >= ev_len)
+	{
+		char *fixit = (char *) &iqueue[iqhead * IEV_SZ];
+		spin_unlock_irqrestore(&lock,flags);
+		if (copy_to_user(&(buf)[p], fixit, ev_len))
+			return count - c;
+		p += ev_len;
+		c -= ev_len;
+
+		spin_lock_irqsave(&lock,flags);
+		iqhead = (iqhead + 1) % SEQ_MAX_QUEUE;
+		iqlen--;
+	}
+	spin_unlock_irqrestore(&lock,flags);
+	return count - c;
+}
+
+static void sequencer_midi_output(int dev)
+{
+	/*
+	 * Currently NOP
+	 */
+}
+
+void seq_copy_to_input(unsigned char *event_rec, int len)
+{
+	unsigned long flags;
+
+	/*
+	 * Verify that the len is valid for the current mode.
+	 */
+
+	if (len != 4 && len != 8)
+		return;
+	if ((seq_mode == SEQ_1) != (len == 4))
+		return;
+
+	if (iqlen >= (SEQ_MAX_QUEUE - 1))
+		return;		/* Overflow */
+
+	spin_lock_irqsave(&lock,flags);
+	memcpy(&iqueue[iqtail * IEV_SZ], event_rec, len);
+	iqlen++;
+	iqtail = (iqtail + 1) % SEQ_MAX_QUEUE;
+	wake_up(&midi_sleeper);
+	spin_unlock_irqrestore(&lock,flags);
+}
+EXPORT_SYMBOL(seq_copy_to_input);
+
+static void sequencer_midi_input(int dev, unsigned char data)
+{
+	unsigned int tstamp;
+	unsigned char event_rec[4];
+
+	if (data == 0xfe)	/* Ignore active sensing */
+		return;
+
+	tstamp = jiffies - seq_time;
+
+	if (tstamp != prev_input_time)
+	{
+		tstamp = (tstamp << 8) | SEQ_WAIT;
+		seq_copy_to_input((unsigned char *) &tstamp, 4);
+		prev_input_time = tstamp;
+	}
+	event_rec[0] = SEQ_MIDIPUTC;
+	event_rec[1] = data;
+	event_rec[2] = dev;
+	event_rec[3] = 0;
+
+	seq_copy_to_input(event_rec, 4);
+}
+
+void seq_input_event(unsigned char *event_rec, int len)
+{
+	unsigned long this_time;
+
+	if (seq_mode == SEQ_2)
+		this_time = tmr->get_time(tmr_no);
+	else
+		this_time = jiffies - seq_time;
+
+	if (this_time != prev_input_time)
+	{
+		unsigned char   tmp_event[8];
+
+		tmp_event[0] = EV_TIMING;
+		tmp_event[1] = TMR_WAIT_ABS;
+		tmp_event[2] = 0;
+		tmp_event[3] = 0;
+		*(unsigned int *) &tmp_event[4] = this_time;
+
+		seq_copy_to_input(tmp_event, 8);
+		prev_input_time = this_time;
+	}
+	seq_copy_to_input(event_rec, len);
+}
+EXPORT_SYMBOL(seq_input_event);
+
+int sequencer_write(int dev, struct file *file, const char __user *buf, int count)
+{
+	unsigned char event_rec[EV_SZ], ev_code;
+	int p = 0, c, ev_size;
+	int mode = translate_mode(file);
+
+	dev = dev >> 4;
+
+	if (mode == OPEN_READ)
+		return -EIO;
+
+	c = count;
+
+	while (c >= 4)
+	{
+		if (copy_from_user((char *) event_rec, &(buf)[p], 4))
+			goto out;
+		ev_code = event_rec[0];
+
+		if (ev_code == SEQ_FULLSIZE)
+		{
+			int err, fmt;
+
+			dev = *(unsigned short *) &event_rec[2];
+			if (dev < 0 || dev >= max_synthdev || synth_devs[dev] == NULL)
+				return -ENXIO;
+
+			if (!(synth_open_mask & (1 << dev)))
+				return -ENXIO;
+
+			fmt = (*(short *) &event_rec[0]) & 0xffff;
+			err = synth_devs[dev]->load_patch(dev, fmt, buf + p, c, 0);
+			if (err < 0)
+				return err;
+
+			return err;
+		}
+		if (ev_code >= 128)
+		{
+			if (seq_mode == SEQ_2 && ev_code == SEQ_EXTENDED)
+			{
+				printk(KERN_WARNING "Sequencer: Invalid level 2 event %x\n", ev_code);
+				return -EINVAL;
+			}
+			ev_size = 8;
+
+			if (c < ev_size)
+			{
+				if (!seq_playing)
+					seq_startplay();
+				return count - c;
+			}
+			if (copy_from_user((char *)&event_rec[4],
+					   &(buf)[p + 4], 4))
+				goto out;
+
+		}
+		else
+		{
+			if (seq_mode == SEQ_2)
+			{
+				printk(KERN_WARNING "Sequencer: 4 byte event in level 2 mode\n");
+				return -EINVAL;
+			}
+			ev_size = 4;
+
+			if (event_rec[0] != SEQ_MIDIPUTC)
+				obsolete_api_used = 1;
+		}
+
+		if (event_rec[0] == SEQ_MIDIPUTC)
+		{
+			if (!midi_opened[event_rec[2]])
+			{
+				int err, mode;
+				int dev = event_rec[2];
+
+				if (dev >= max_mididev || midi_devs[dev]==NULL)
+				{
+					/*printk("Sequencer Error: Nonexistent MIDI device %d\n", dev);*/
+					return -ENXIO;
+				}
+				mode = translate_mode(file);
+
+				if ((err = midi_devs[dev]->open(dev, mode,
+								sequencer_midi_input, sequencer_midi_output)) < 0)
+				{
+					seq_reset();
+					printk(KERN_WARNING "Sequencer Error: Unable to open Midi #%d\n", dev);
+					return err;
+				}
+				midi_opened[dev] = 1;
+			}
+		}
+		if (!seq_queue(event_rec, (file->f_flags & (O_NONBLOCK) ? 1 : 0)))
+		{
+			int processed = count - c;
+
+			if (!seq_playing)
+				seq_startplay();
+
+			if (!processed && (file->f_flags & O_NONBLOCK))
+				return -EAGAIN;
+			else
+				return processed;
+		}
+		p += ev_size;
+		c -= ev_size;
+	}
+
+	if (!seq_playing)
+		seq_startplay();
+out:
+	return count;
+}
+
+static int seq_queue(unsigned char *note, char nonblock)
+{
+
+	/*
+	 * Test if there is space in the queue
+	 */
+
+	if (qlen >= SEQ_MAX_QUEUE)
+		if (!seq_playing)
+			seq_startplay();	/*
+						 * Give chance to drain the queue
+						 */
+
+	if (!nonblock && qlen >= SEQ_MAX_QUEUE && !waitqueue_active(&seq_sleeper)) {
+		/*
+		 * Sleep until there is enough space on the queue
+		 */
+		oss_broken_sleep_on(&seq_sleeper, MAX_SCHEDULE_TIMEOUT);
+	}
+	if (qlen >= SEQ_MAX_QUEUE)
+	{
+		return 0;	/*
+				 * To be sure
+				 */
+	}
+	memcpy(&queue[qtail * EV_SZ], note, EV_SZ);
+
+	qtail = (qtail + 1) % SEQ_MAX_QUEUE;
+	qlen++;
+
+	return 1;
+}
+
+static int extended_event(unsigned char *q)
+{
+	int dev = q[2];
+
+	if (dev < 0 || dev >= max_synthdev)
+		return -ENXIO;
+
+	if (!(synth_open_mask & (1 << dev)))
+		return -ENXIO;
+
+	switch (q[1])
+	{
+		case SEQ_NOTEOFF:
+			synth_devs[dev]->kill_note(dev, q[3], q[4], q[5]);
+			break;
+
+		case SEQ_NOTEON:
+			if (q[4] > 127 && q[4] != 255)
+				return 0;
+
+			if (q[5] == 0)
+			{
+				synth_devs[dev]->kill_note(dev, q[3], q[4], q[5]);
+				break;
+			}
+			synth_devs[dev]->start_note(dev, q[3], q[4], q[5]);
+			break;
+
+		case SEQ_PGMCHANGE:
+			synth_devs[dev]->set_instr(dev, q[3], q[4]);
+			break;
+
+		case SEQ_AFTERTOUCH:
+			synth_devs[dev]->aftertouch(dev, q[3], q[4]);
+			break;
+
+		case SEQ_BALANCE:
+			synth_devs[dev]->panning(dev, q[3], (char) q[4]);
+			break;
+
+		case SEQ_CONTROLLER:
+			synth_devs[dev]->controller(dev, q[3], q[4], (short) (q[5] | (q[6] << 8)));
+			break;
+
+		case SEQ_VOLMODE:
+			if (synth_devs[dev]->volume_method != NULL)
+				synth_devs[dev]->volume_method(dev, q[3]);
+			break;
+
+		default:
+			return -EINVAL;
+	}
+	return 0;
+}
+
+static int find_voice(int dev, int chn, int note)
+{
+	unsigned short key;
+	int i;
+
+	key = (chn << 8) | (note + 1);
+	for (i = 0; i < synth_devs[dev]->alloc.max_voice; i++)
+		if (synth_devs[dev]->alloc.map[i] == key)
+			return i;
+	return -1;
+}
+
+static int alloc_voice(int dev, int chn, int note)
+{
+	unsigned short  key;
+	int voice;
+
+	key = (chn << 8) | (note + 1);
+
+	voice = synth_devs[dev]->alloc_voice(dev, chn, note,
+					     &synth_devs[dev]->alloc);
+	synth_devs[dev]->alloc.map[voice] = key;
+	synth_devs[dev]->alloc.alloc_times[voice] =
+			synth_devs[dev]->alloc.timestamp++;
+	return voice;
+}
+
+static void seq_chn_voice_event(unsigned char *event_rec)
+{
+#define dev event_rec[1]
+#define cmd event_rec[2]
+#define chn event_rec[3]
+#define note event_rec[4]
+#define parm event_rec[5]
+
+	int voice = -1;
+
+	if ((int) dev > max_synthdev || synth_devs[dev] == NULL)
+		return;
+	if (!(synth_open_mask & (1 << dev)))
+		return;
+	if (!synth_devs[dev])
+		return;
+
+	if (seq_mode == SEQ_2)
+	{
+		if (synth_devs[dev]->alloc_voice)
+			voice = find_voice(dev, chn, note);
+
+		if (cmd == MIDI_NOTEON && parm == 0)
+		{
+			cmd = MIDI_NOTEOFF;
+			parm = 64;
+		}
+	}
+
+	switch (cmd)
+	{
+		case MIDI_NOTEON:
+			if (note > 127 && note != 255)	/* Not a seq2 feature */
+				return;
+
+			if (voice == -1 && seq_mode == SEQ_2 && synth_devs[dev]->alloc_voice)
+			{
+				/* Internal synthesizer (FM, GUS, etc) */
+				voice = alloc_voice(dev, chn, note);
+			}
+			if (voice == -1)
+				voice = chn;
+
+			if (seq_mode == SEQ_2 && (int) dev < num_synths)
+			{
+				/*
+				 * The MIDI channel 10 is a percussive channel. Use the note
+				 * number to select the proper patch (128 to 255) to play.
+				 */
+
+				if (chn == 9)
+				{
+					synth_devs[dev]->set_instr(dev, voice, 128 + note);
+					synth_devs[dev]->chn_info[chn].pgm_num = 128 + note;
+				}
+				synth_devs[dev]->setup_voice(dev, voice, chn);
+			}
+			synth_devs[dev]->start_note(dev, voice, note, parm);
+			break;
+
+		case MIDI_NOTEOFF:
+			if (voice == -1)
+				voice = chn;
+			synth_devs[dev]->kill_note(dev, voice, note, parm);
+			break;
+
+		case MIDI_KEY_PRESSURE:
+			if (voice == -1)
+				voice = chn;
+			synth_devs[dev]->aftertouch(dev, voice, parm);
+			break;
+
+		default:;
+	}
+#undef dev
+#undef cmd
+#undef chn
+#undef note
+#undef parm
+}
+
+
+static void seq_chn_common_event(unsigned char *event_rec)
+{
+	unsigned char dev = event_rec[1];
+	unsigned char cmd = event_rec[2];
+	unsigned char chn = event_rec[3];
+	unsigned char p1 = event_rec[4];
+
+	/* unsigned char p2 = event_rec[5]; */
+	unsigned short w14 = *(short *) &event_rec[6];
+
+	if ((int) dev > max_synthdev || synth_devs[dev] == NULL)
+		return;
+	if (!(synth_open_mask & (1 << dev)))
+		return;
+	if (!synth_devs[dev])
+		return;
+
+	switch (cmd)
+	{
+		case MIDI_PGM_CHANGE:
+			if (seq_mode == SEQ_2)
+			{
+				if (chn > 15)
+					break;
+
+				synth_devs[dev]->chn_info[chn].pgm_num = p1;
+				if ((int) dev >= num_synths)
+					synth_devs[dev]->set_instr(dev, chn, p1);
+			}
+			else
+				synth_devs[dev]->set_instr(dev, chn, p1);
+
+			break;
+
+		case MIDI_CTL_CHANGE:
+			if (seq_mode == SEQ_2)
+			{
+				if (chn > 15 || p1 > 127)
+					break;
+
+				synth_devs[dev]->chn_info[chn].controllers[p1] = w14 & 0x7f;
+
+				if (p1 < 32)	/* Setting MSB should clear LSB to 0 */
+					synth_devs[dev]->chn_info[chn].controllers[p1 + 32] = 0;
+
+				if ((int) dev < num_synths)
+				{
+					int val = w14 & 0x7f;
+					int i, key;
+
+					if (p1 < 64)	/* Combine MSB and LSB */
+					{
+						val = ((synth_devs[dev]->
+							chn_info[chn].controllers[p1 & ~32] & 0x7f) << 7)
+							| (synth_devs[dev]->
+							chn_info[chn].controllers[p1 | 32] & 0x7f);
+						p1 &= ~32;
+					}
+					/* Handle all playing notes on this channel */
+
+					key = ((int) chn << 8);
+
+					for (i = 0; i < synth_devs[dev]->alloc.max_voice; i++)
+						if ((synth_devs[dev]->alloc.map[i] & 0xff00) == key)
+							synth_devs[dev]->controller(dev, i, p1, val);
+				}
+				else
+					synth_devs[dev]->controller(dev, chn, p1, w14);
+			}
+			else	/* Mode 1 */
+				synth_devs[dev]->controller(dev, chn, p1, w14);
+			break;
+
+		case MIDI_PITCH_BEND:
+			if (seq_mode == SEQ_2)
+			{
+				if (chn > 15)
+					break;
+
+				synth_devs[dev]->chn_info[chn].bender_value = w14;
+
+				if ((int) dev < num_synths)
+				{
+					/* Handle all playing notes on this channel */
+					int i, key;
+
+					key = (chn << 8);
+
+					for (i = 0; i < synth_devs[dev]->alloc.max_voice; i++)
+						if ((synth_devs[dev]->alloc.map[i] & 0xff00) == key)
+							synth_devs[dev]->bender(dev, i, w14);
+				}
+				else
+					synth_devs[dev]->bender(dev, chn, w14);
+			}
+			else	/* MODE 1 */
+				synth_devs[dev]->bender(dev, chn, w14);
+			break;
+
+		default:;
+	}
+}
+
+static int seq_timing_event(unsigned char *event_rec)
+{
+	unsigned char cmd = event_rec[1];
+	unsigned int parm = *(int *) &event_rec[4];
+
+	if (seq_mode == SEQ_2)
+	{
+		int ret;
+
+		if ((ret = tmr->event(tmr_no, event_rec)) == TIMER_ARMED)
+			if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
+				wake_up(&seq_sleeper);
+		return ret;
+	}
+	switch (cmd)
+	{
+		case TMR_WAIT_REL:
+			parm += prev_event_time;
+
+			/*
+			 * NOTE!  No break here. Execution of TMR_WAIT_REL continues in the
+			 * next case (TMR_WAIT_ABS)
+			 */
+
+		case TMR_WAIT_ABS:
+			if (parm > 0)
+			{
+				long time;
+
+				time = parm;
+				prev_event_time = time;
+
+				seq_playing = 1;
+				request_sound_timer(time);
+
+				if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
+					wake_up(&seq_sleeper);
+				return TIMER_ARMED;
+			}
+			break;
+
+		case TMR_START:
+			seq_time = jiffies;
+			prev_input_time = 0;
+			prev_event_time = 0;
+			break;
+
+		case TMR_STOP:
+			break;
+
+		case TMR_CONTINUE:
+			break;
+
+		case TMR_TEMPO:
+			break;
+
+		case TMR_ECHO:
+			parm = (parm << 8 | SEQ_ECHO);
+			seq_copy_to_input((unsigned char *) &parm, 4);
+			break;
+
+		default:;
+	}
+
+	return TIMER_NOT_ARMED;
+}
+
+static void seq_local_event(unsigned char *event_rec)
+{
+	unsigned char   cmd = event_rec[1];
+	unsigned int    parm = *((unsigned int *) &event_rec[4]);
+
+	switch (cmd)
+	{
+		case LOCL_STARTAUDIO:
+			DMAbuf_start_devices(parm);
+			break;
+
+		default:;
+	}
+}
+
+static void seq_sysex_message(unsigned char *event_rec)
+{
+	unsigned int dev = event_rec[1];
+	int i, l = 0;
+	unsigned char  *buf = &event_rec[2];
+
+	if (dev > max_synthdev)
+		return;
+	if (!(synth_open_mask & (1 << dev)))
+		return;
+	if (!synth_devs[dev])
+		return;
+
+	l = 0;
+	for (i = 0; i < 6 && buf[i] != 0xff; i++)
+		l = i + 1;
+
+	if (!synth_devs[dev]->send_sysex)
+		return;
+	if (l > 0)
+		synth_devs[dev]->send_sysex(dev, buf, l);
+}
+
+static int play_event(unsigned char *q)
+{
+	/*
+	 * NOTE! This routine returns
+	 *   0 = normal event played.
+	 *   1 = Timer armed. Suspend playback until timer callback.
+	 *   2 = MIDI output buffer full. Restore queue and suspend until timer
+	 */
+	unsigned int *delay;
+
+	switch (q[0])
+	{
+		case SEQ_NOTEOFF:
+			if (synth_open_mask & (1 << 0))
+				if (synth_devs[0])
+					synth_devs[0]->kill_note(0, q[1], 255, q[3]);
+			break;
+
+		case SEQ_NOTEON:
+			if (q[4] < 128 || q[4] == 255)
+				if (synth_open_mask & (1 << 0))
+					if (synth_devs[0])
+						synth_devs[0]->start_note(0, q[1], q[2], q[3]);
+			break;
+
+		case SEQ_WAIT:
+			delay = (unsigned int *) q;	/*
+							 * Bytes 1 to 3 are containing the *
+							 * delay in 'ticks'
+							 */
+			*delay = (*delay >> 8) & 0xffffff;
+
+			if (*delay > 0)
+			{
+				long time;
+
+				seq_playing = 1;
+				time = *delay;
+				prev_event_time = time;
+
+				request_sound_timer(time);
+
+				if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
+					wake_up(&seq_sleeper);
+				/*
+				 * The timer is now active and will reinvoke this function
+				 * after the timer expires. Return to the caller now.
+				 */
+				return 1;
+			}
+			break;
+
+		case SEQ_PGMCHANGE:
+			if (synth_open_mask & (1 << 0))
+				if (synth_devs[0])
+					synth_devs[0]->set_instr(0, q[1], q[2]);
+			break;
+
+		case SEQ_SYNCTIMER: 	/*
+					 * Reset timer
+					 */
+			seq_time = jiffies;
+			prev_input_time = 0;
+			prev_event_time = 0;
+			break;
+
+		case SEQ_MIDIPUTC:	/*
+					 * Put a midi character
+					 */
+			if (midi_opened[q[2]])
+			{
+				int dev;
+
+				dev = q[2];
+
+				if (dev < 0 || dev >= num_midis || midi_devs[dev] == NULL)
+					break;
+
+				if (!midi_devs[dev]->outputc(dev, q[1]))
+				{
+					/*
+					 * Output FIFO is full. Wait one timer cycle and try again.
+					 */
+
+					seq_playing = 1;
+					request_sound_timer(-1);
+					return 2;
+				}
+				else
+					midi_written[dev] = 1;
+			}
+			break;
+
+		case SEQ_ECHO:
+			seq_copy_to_input(q, 4);	/*
+							 * Echo back to the process
+							 */
+			break;
+
+		case SEQ_PRIVATE:
+			if ((int) q[1] < max_synthdev)
+				synth_devs[q[1]]->hw_control(q[1], q);
+			break;
+
+		case SEQ_EXTENDED:
+			extended_event(q);
+			break;
+
+		case EV_CHN_VOICE:
+			seq_chn_voice_event(q);
+			break;
+
+		case EV_CHN_COMMON:
+			seq_chn_common_event(q);
+			break;
+
+		case EV_TIMING:
+			if (seq_timing_event(q) == TIMER_ARMED)
+			{
+				return 1;
+			}
+			break;
+
+		case EV_SEQ_LOCAL:
+			seq_local_event(q);
+			break;
+
+		case EV_SYSEX:
+			seq_sysex_message(q);
+			break;
+
+		default:;
+	}
+	return 0;
+}
+
+/* called also as timer in irq context */
+static void seq_startplay(void)
+{
+	int this_one, action;
+	unsigned long flags;
+
+	while (qlen > 0)
+	{
+
+		spin_lock_irqsave(&lock,flags);
+		qhead = ((this_one = qhead) + 1) % SEQ_MAX_QUEUE;
+		qlen--;
+		spin_unlock_irqrestore(&lock,flags);
+
+		seq_playing = 1;
+
+		if ((action = play_event(&queue[this_one * EV_SZ])))
+		{		/* Suspend playback. Next timer routine invokes this routine again */
+			if (action == 2)
+			{
+				qlen++;
+				qhead = this_one;
+			}
+			return;
+		}
+	}
+
+	seq_playing = 0;
+
+	if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
+		wake_up(&seq_sleeper);
+}
+
+static void reset_controllers(int dev, unsigned char *controller, int update_dev)
+{
+	int i;
+	for (i = 0; i < 128; i++)
+		controller[i] = ctrl_def_values[i];
+}
+
+static void setup_mode2(void)
+{
+	int dev;
+
+	max_synthdev = num_synths;
+
+	for (dev = 0; dev < num_midis; dev++)
+	{
+		if (midi_devs[dev] && midi_devs[dev]->converter != NULL)
+		{
+			synth_devs[max_synthdev++] = midi_devs[dev]->converter;
+		}
+	}
+
+	for (dev = 0; dev < max_synthdev; dev++)
+	{
+		int chn;
+
+		synth_devs[dev]->sysex_ptr = 0;
+		synth_devs[dev]->emulation = 0;
+
+		for (chn = 0; chn < 16; chn++)
+		{
+			synth_devs[dev]->chn_info[chn].pgm_num = 0;
+			reset_controllers(dev,
+				synth_devs[dev]->chn_info[chn].controllers,0);
+			synth_devs[dev]->chn_info[chn].bender_value = (1 << 7);	/* Neutral */
+			synth_devs[dev]->chn_info[chn].bender_range = 200;
+		}
+	}
+	max_mididev = 0;
+	seq_mode = SEQ_2;
+}
+
+int sequencer_open(int dev, struct file *file)
+{
+	int retval, mode, i;
+	int level, tmp;
+
+	if (!sequencer_ok)
+		sequencer_init();
+
+	level = ((dev & 0x0f) == SND_DEV_SEQ2) ? 2 : 1;
+
+	dev = dev >> 4;
+	mode = translate_mode(file);
+
+	if (!sequencer_ok)
+	{
+/*		printk("Sound card: sequencer not initialized\n");*/
+		return -ENXIO;
+	}
+	if (dev)		/* Patch manager device (obsolete) */
+		return -ENXIO;
+
+	if(synth_devs[dev] == NULL)
+		request_module("synth0");
+
+	if (mode == OPEN_READ)
+	{
+		if (!num_midis)
+		{
+			/*printk("Sequencer: No MIDI devices. Input not possible\n");*/
+			sequencer_busy = 0;
+			return -ENXIO;
+		}
+	}
+	if (sequencer_busy)
+	{
+		return -EBUSY;
+	}
+	sequencer_busy = 1;
+	obsolete_api_used = 0;
+
+	max_mididev = num_midis;
+	max_synthdev = num_synths;
+	pre_event_timeout = MAX_SCHEDULE_TIMEOUT;
+	seq_mode = SEQ_1;
+
+	if (pending_timer != -1)
+	{
+		tmr_no = pending_timer;
+		pending_timer = -1;
+	}
+	if (tmr_no == -1)	/* Not selected yet */
+	{
+		int i, best;
+
+		best = -1;
+		for (i = 0; i < num_sound_timers; i++)
+			if (sound_timer_devs[i] && sound_timer_devs[i]->priority > best)
+			{
+				tmr_no = i;
+				best = sound_timer_devs[i]->priority;
+			}
+		if (tmr_no == -1)	/* Should not be */
+			tmr_no = 0;
+	}
+	tmr = sound_timer_devs[tmr_no];
+
+	if (level == 2)
+	{
+		if (tmr == NULL)
+		{
+			/*printk("sequencer: No timer for level 2\n");*/
+			sequencer_busy = 0;
+			return -ENXIO;
+		}
+		setup_mode2();
+	}
+	if (!max_synthdev && !max_mididev)
+	{
+		sequencer_busy=0;
+		return -ENXIO;
+	}
+
+	synth_open_mask = 0;
+
+	for (i = 0; i < max_mididev; i++)
+	{
+		midi_opened[i] = 0;
+		midi_written[i] = 0;
+	}
+
+	for (i = 0; i < max_synthdev; i++)
+	{
+		if (synth_devs[i]==NULL)
+			continue;
+
+		if (!try_module_get(synth_devs[i]->owner))
+			continue;
+
+		if ((tmp = synth_devs[i]->open(i, mode)) < 0)
+		{
+			printk(KERN_WARNING "Sequencer: Warning! Cannot open synth device #%d (%d)\n", i, tmp);
+			if (synth_devs[i]->midi_dev)
+				printk(KERN_WARNING "(Maps to MIDI dev #%d)\n", synth_devs[i]->midi_dev);
+		}
+		else
+		{
+			synth_open_mask |= (1 << i);
+			if (synth_devs[i]->midi_dev)
+				midi_opened[synth_devs[i]->midi_dev] = 1;
+		}
+	}
+
+	seq_time = jiffies;
+
+	prev_input_time = 0;
+	prev_event_time = 0;
+
+	if (seq_mode == SEQ_1 && (mode == OPEN_READ || mode == OPEN_READWRITE))
+	{
+		/*
+		 * Initialize midi input devices
+		 */
+
+		for (i = 0; i < max_mididev; i++)
+			if (!midi_opened[i] && midi_devs[i])
+			{
+				if (!try_module_get(midi_devs[i]->owner))
+					continue;
+	
+				if ((retval = midi_devs[i]->open(i, mode,
+					sequencer_midi_input, sequencer_midi_output)) >= 0)
+				{
+					midi_opened[i] = 1;
+				}
+			}
+	}
+
+	if (seq_mode == SEQ_2) {
+		if (try_module_get(tmr->owner))
+			tmr->open(tmr_no, seq_mode);
+	}
+
+ 	init_waitqueue_head(&seq_sleeper);
+ 	init_waitqueue_head(&midi_sleeper);
+	output_threshold = SEQ_MAX_QUEUE / 2;
+
+	return 0;
+}
+
+static void seq_drain_midi_queues(void)
+{
+	int i, n;
+
+	/*
+	 * Give the Midi drivers time to drain their output queues
+	 */
+
+	n = 1;
+
+	while (!signal_pending(current) && n)
+	{
+		n = 0;
+
+		for (i = 0; i < max_mididev; i++)
+			if (midi_opened[i] && midi_written[i])
+				if (midi_devs[i]->buffer_status != NULL)
+					if (midi_devs[i]->buffer_status(i))
+						n++;
+
+		/*
+		 * Let's have a delay
+		 */
+
+ 		if (n)
+			oss_broken_sleep_on(&seq_sleeper, HZ/10);
+	}
+}
+
+void sequencer_release(int dev, struct file *file)
+{
+	int i;
+	int mode = translate_mode(file);
+
+	dev = dev >> 4;
+
+	/*
+	 * Wait until the queue is empty (if we don't have nonblock)
+	 */
+
+	if (mode != OPEN_READ && !(file->f_flags & O_NONBLOCK))
+	{
+		while (!signal_pending(current) && qlen > 0)
+		{
+  			seq_sync();
+			oss_broken_sleep_on(&seq_sleeper, 3*HZ);
+ 			/* Extra delay */
+		}
+	}
+
+	if (mode != OPEN_READ)
+		seq_drain_midi_queues();	/*
+						 * Ensure the output queues are empty
+						 */
+	seq_reset();
+	if (mode != OPEN_READ)
+		seq_drain_midi_queues();	/*
+						 * Flush the all notes off messages
+						 */
+
+	for (i = 0; i < max_synthdev; i++)
+	{
+		if (synth_open_mask & (1 << i))	/*
+						 * Actually opened
+						 */
+			if (synth_devs[i])
+			{
+				synth_devs[i]->close(i);
+
+				module_put(synth_devs[i]->owner);
+
+				if (synth_devs[i]->midi_dev)
+					midi_opened[synth_devs[i]->midi_dev] = 0;
+			}
+	}
+
+	for (i = 0; i < max_mididev; i++)
+	{
+		if (midi_opened[i]) {
+			midi_devs[i]->close(i);
+			module_put(midi_devs[i]->owner);
+		}
+	}
+
+	if (seq_mode == SEQ_2) {
+		tmr->close(tmr_no);
+		module_put(tmr->owner);
+	}
+
+	if (obsolete_api_used)
+		printk(KERN_WARNING "/dev/music: Obsolete (4 byte) API was used by %s\n", current->comm);
+	sequencer_busy = 0;
+}
+
+static int seq_sync(void)
+{
+	if (qlen && !seq_playing && !signal_pending(current))
+		seq_startplay();
+
+ 	if (qlen > 0)
+		oss_broken_sleep_on(&seq_sleeper, HZ);
+	return qlen;
+}
+
+static void midi_outc(int dev, unsigned char data)
+{
+	/*
+	 * NOTE! Calls sleep(). Don't call this from interrupt.
+	 */
+
+	int n;
+	unsigned long flags;
+
+	/*
+	 * This routine sends one byte to the Midi channel.
+	 * If the output FIFO is full, it waits until there
+	 * is space in the queue
+	 */
+
+	n = 3 * HZ;		/* Timeout */
+
+	spin_lock_irqsave(&lock,flags);
+ 	while (n && !midi_devs[dev]->outputc(dev, data)) {
+		oss_broken_sleep_on(&seq_sleeper, HZ/25);
+  		n--;
+  	}
+	spin_unlock_irqrestore(&lock,flags);
+}
+
+static void seq_reset(void)
+{
+	/*
+	 * NOTE! Calls sleep(). Don't call this from interrupt.
+	 */
+
+	int i;
+	int chn;
+	unsigned long flags;
+
+	sound_stop_timer();
+
+	seq_time = jiffies;
+	prev_input_time = 0;
+	prev_event_time = 0;
+
+	qlen = qhead = qtail = 0;
+	iqlen = iqhead = iqtail = 0;
+
+	for (i = 0; i < max_synthdev; i++)
+		if (synth_open_mask & (1 << i))
+			if (synth_devs[i])
+				synth_devs[i]->reset(i);
+
+	if (seq_mode == SEQ_2)
+	{
+		for (chn = 0; chn < 16; chn++)
+			for (i = 0; i < max_synthdev; i++)
+				if (synth_open_mask & (1 << i))
+					if (synth_devs[i])
+					{
+						synth_devs[i]->controller(i, chn, 123, 0);	/* All notes off */
+						synth_devs[i]->controller(i, chn, 121, 0);	/* Reset all ctl */
+						synth_devs[i]->bender(i, chn, 1 << 13);	/* Bender off */
+					}
+	}
+	else	/* seq_mode == SEQ_1 */
+	{
+		for (i = 0; i < max_mididev; i++)
+			if (midi_written[i])	/*
+						 * Midi used. Some notes may still be playing
+						 */
+			{
+				/*
+				 *      Sending just a ACTIVE SENSING message should be enough to stop all
+				 *      playing notes. Since there are devices not recognizing the
+				 *      active sensing, we have to send some all notes off messages also.
+				 */
+				midi_outc(i, 0xfe);
+
+				for (chn = 0; chn < 16; chn++)
+				{
+					midi_outc(i, (unsigned char) (0xb0 + (chn & 0x0f)));		/* control change */
+					midi_outc(i, 0x7b);	/* All notes off */
+					midi_outc(i, 0);	/* Dummy parameter */
+				}
+
+				midi_devs[i]->close(i);
+
+				midi_written[i] = 0;
+				midi_opened[i] = 0;
+			}
+	}
+
+	seq_playing = 0;
+
+	spin_lock_irqsave(&lock,flags);
+
+	if (waitqueue_active(&seq_sleeper)) {
+		/*      printk( "Sequencer Warning: Unexpected sleeping process - Waking up\n"); */
+		wake_up(&seq_sleeper);
+	}
+	spin_unlock_irqrestore(&lock,flags);
+}
+
+static void seq_panic(void)
+{
+	/*
+	 * This routine is called by the application in case the user
+	 * wants to reset the system to the default state.
+	 */
+
+	seq_reset();
+
+	/*
+	 * Since some of the devices don't recognize the active sensing and
+	 * all notes off messages, we have to shut all notes manually.
+	 *
+	 *      TO BE IMPLEMENTED LATER
+	 */
+
+	/*
+	 * Also return the controllers to their default states
+	 */
+}
+
+int sequencer_ioctl(int dev, struct file *file, unsigned int cmd, void __user *arg)
+{
+	int midi_dev, orig_dev, val, err;
+	int mode = translate_mode(file);
+	struct synth_info inf;
+	struct seq_event_rec event_rec;
+	int __user *p = arg;
+
+	orig_dev = dev = dev >> 4;
+
+	switch (cmd)
+	{
+		case SNDCTL_TMR_TIMEBASE:
+		case SNDCTL_TMR_TEMPO:
+		case SNDCTL_TMR_START:
+		case SNDCTL_TMR_STOP:
+		case SNDCTL_TMR_CONTINUE:
+		case SNDCTL_TMR_METRONOME:
+		case SNDCTL_TMR_SOURCE:
+			if (seq_mode != SEQ_2)
+				return -EINVAL;
+			return tmr->ioctl(tmr_no, cmd, arg);
+
+		case SNDCTL_TMR_SELECT:
+			if (seq_mode != SEQ_2)
+				return -EINVAL;
+			if (get_user(pending_timer, p))
+				return -EFAULT;
+			if (pending_timer < 0 || pending_timer >= num_sound_timers || sound_timer_devs[pending_timer] == NULL)
+			{
+				pending_timer = -1;
+				return -EINVAL;
+			}
+			val = pending_timer;
+			break;
+
+		case SNDCTL_SEQ_PANIC:
+			seq_panic();
+			return -EINVAL;
+
+		case SNDCTL_SEQ_SYNC:
+			if (mode == OPEN_READ)
+				return 0;
+			while (qlen > 0 && !signal_pending(current))
+				seq_sync();
+			return qlen ? -EINTR : 0;
+
+		case SNDCTL_SEQ_RESET:
+			seq_reset();
+			return 0;
+
+		case SNDCTL_SEQ_TESTMIDI:
+			if (__get_user(midi_dev, p))
+				return -EFAULT;
+			if (midi_dev < 0 || midi_dev >= max_mididev || !midi_devs[midi_dev])
+				return -ENXIO;
+
+			if (!midi_opened[midi_dev] &&
+				(err = midi_devs[midi_dev]->open(midi_dev, mode, sequencer_midi_input,
+						     sequencer_midi_output)) < 0)
+				return err;
+			midi_opened[midi_dev] = 1;
+			return 0;
+
+		case SNDCTL_SEQ_GETINCOUNT:
+			if (mode == OPEN_WRITE)
+				return 0;
+			val = iqlen;
+			break;
+
+		case SNDCTL_SEQ_GETOUTCOUNT:
+			if (mode == OPEN_READ)
+				return 0;
+			val = SEQ_MAX_QUEUE - qlen;
+			break;
+
+		case SNDCTL_SEQ_GETTIME:
+			if (seq_mode == SEQ_2)
+				return tmr->ioctl(tmr_no, cmd, arg);
+			val = jiffies - seq_time;
+			break;
+
+		case SNDCTL_SEQ_CTRLRATE:
+			/*
+			 * If *arg == 0, just return the current rate
+			 */
+			if (seq_mode == SEQ_2)
+				return tmr->ioctl(tmr_no, cmd, arg);
+
+			if (get_user(val, p))
+				return -EFAULT;
+			if (val != 0)
+				return -EINVAL;
+			val = HZ;
+			break;
+
+		case SNDCTL_SEQ_RESETSAMPLES:
+		case SNDCTL_SYNTH_REMOVESAMPLE:
+		case SNDCTL_SYNTH_CONTROL:
+			if (get_user(dev, p))
+				return -EFAULT;
+			if (dev < 0 || dev >= num_synths || synth_devs[dev] == NULL)
+				return -ENXIO;
+			if (!(synth_open_mask & (1 << dev)) && !orig_dev)
+				return -EBUSY;
+			return synth_devs[dev]->ioctl(dev, cmd, arg);
+
+		case SNDCTL_SEQ_NRSYNTHS:
+			val = max_synthdev;
+			break;
+
+		case SNDCTL_SEQ_NRMIDIS:
+			val = max_mididev;
+			break;
+
+		case SNDCTL_SYNTH_MEMAVL:
+			if (get_user(dev, p))
+				return -EFAULT;
+			if (dev < 0 || dev >= num_synths || synth_devs[dev] == NULL)
+				return -ENXIO;
+			if (!(synth_open_mask & (1 << dev)) && !orig_dev)
+				return -EBUSY;
+			val = synth_devs[dev]->ioctl(dev, cmd, arg);
+			break;
+
+		case SNDCTL_FM_4OP_ENABLE:
+			if (get_user(dev, p))
+				return -EFAULT;
+			if (dev < 0 || dev >= num_synths || synth_devs[dev] == NULL)
+				return -ENXIO;
+			if (!(synth_open_mask & (1 << dev)))
+				return -ENXIO;
+			synth_devs[dev]->ioctl(dev, cmd, arg);
+			return 0;
+
+		case SNDCTL_SYNTH_INFO:
+			if (get_user(dev, &((struct synth_info __user *)arg)->device))
+				return -EFAULT;
+			if (dev < 0 || dev >= max_synthdev)
+				return -ENXIO;
+			if (!(synth_open_mask & (1 << dev)) && !orig_dev)
+				return -EBUSY;
+			return synth_devs[dev]->ioctl(dev, cmd, arg);
+
+		/* Like SYNTH_INFO but returns ID in the name field */
+		case SNDCTL_SYNTH_ID:
+			if (get_user(dev, &((struct synth_info __user *)arg)->device))
+				return -EFAULT;
+			if (dev < 0 || dev >= max_synthdev)
+				return -ENXIO;
+			if (!(synth_open_mask & (1 << dev)) && !orig_dev)
+				return -EBUSY;
+			memcpy(&inf, synth_devs[dev]->info, sizeof(inf));
+			strlcpy(inf.name, synth_devs[dev]->id, sizeof(inf.name));
+			inf.device = dev;
+			return copy_to_user(arg, &inf, sizeof(inf))?-EFAULT:0;
+
+		case SNDCTL_SEQ_OUTOFBAND:
+			if (copy_from_user(&event_rec, arg, sizeof(event_rec)))
+				return -EFAULT;
+			play_event(event_rec.arr);
+			return 0;
+
+		case SNDCTL_MIDI_INFO:
+			if (get_user(dev, &((struct midi_info __user *)arg)->device))
+				return -EFAULT;
+			if (dev < 0 || dev >= max_mididev || !midi_devs[dev])
+				return -ENXIO;
+			midi_devs[dev]->info.device = dev;
+			return copy_to_user(arg, &midi_devs[dev]->info, sizeof(struct midi_info))?-EFAULT:0;
+
+		case SNDCTL_SEQ_THRESHOLD:
+			if (get_user(val, p))
+				return -EFAULT;
+			if (val < 1)
+				val = 1;
+			if (val >= SEQ_MAX_QUEUE)
+				val = SEQ_MAX_QUEUE - 1;
+			output_threshold = val;
+			return 0;
+
+		case SNDCTL_MIDI_PRETIME:
+			if (get_user(val, p))
+				return -EFAULT;
+			if (val < 0)
+				val = 0;
+			val = (HZ * val) / 10;
+			pre_event_timeout = val;
+			break;
+
+		default:
+			if (mode == OPEN_READ)
+				return -EIO;
+			if (!synth_devs[0])
+				return -ENXIO;
+			if (!(synth_open_mask & (1 << 0)))
+				return -ENXIO;
+			if (!synth_devs[0]->ioctl)
+				return -EINVAL;
+			return synth_devs[0]->ioctl(0, cmd, arg);
+	}
+	return put_user(val, p);
+}
+
+/* No kernel lock - we're using the global irq lock here */
+unsigned int sequencer_poll(int dev, struct file *file, poll_table * wait)
+{
+	unsigned long flags;
+	unsigned int mask = 0;
+
+	dev = dev >> 4;
+
+	spin_lock_irqsave(&lock,flags);
+	/* input */
+	poll_wait(file, &midi_sleeper, wait);
+	if (iqlen)
+		mask |= POLLIN | POLLRDNORM;
+
+	/* output */
+	poll_wait(file, &seq_sleeper, wait);
+	if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
+		mask |= POLLOUT | POLLWRNORM;
+	spin_unlock_irqrestore(&lock,flags);
+	return mask;
+}
+
+
+void sequencer_timer(unsigned long dummy)
+{
+	seq_startplay();
+}
+EXPORT_SYMBOL(sequencer_timer);
+
+int note_to_freq(int note_num)
+{
+
+	/*
+	 * This routine converts a midi note to a frequency (multiplied by 1000)
+	 */
+
+	int note, octave, note_freq;
+	static int notes[] =
+	{
+		261632, 277189, 293671, 311132, 329632, 349232,
+		369998, 391998, 415306, 440000, 466162, 493880
+	};
+
+#define BASE_OCTAVE	5
+
+	octave = note_num / 12;
+	note = note_num % 12;
+
+	note_freq = notes[note];
+
+	if (octave < BASE_OCTAVE)
+		note_freq >>= (BASE_OCTAVE - octave);
+	else if (octave > BASE_OCTAVE)
+		note_freq <<= (octave - BASE_OCTAVE);
+
+	/*
+	 * note_freq >>= 1;
+	 */
+
+	return note_freq;
+}
+EXPORT_SYMBOL(note_to_freq);
+
+unsigned long compute_finetune(unsigned long base_freq, int bend, int range,
+		 int vibrato_cents)
+{
+	unsigned long amount;
+	int negative, semitones, cents, multiplier = 1;
+
+	if (!bend)
+		return base_freq;
+	if (!range)
+		return base_freq;
+
+	if (!base_freq)
+		return base_freq;
+
+	if (range >= 8192)
+		range = 8192;
+
+	bend = bend * range / 8192;	/* Convert to cents */
+	bend += vibrato_cents;
+
+	if (!bend)
+		return base_freq;
+
+	negative = bend < 0 ? 1 : 0;
+
+	if (bend < 0)
+		bend *= -1;
+	if (bend > range)
+		bend = range;
+
+	/*
+	   if (bend > 2399)
+	   bend = 2399;
+	 */
+	while (bend > 2399)
+	{
+		multiplier *= 4;
+		bend -= 2400;
+	}
+
+	semitones = bend / 100;
+	cents = bend % 100;
+
+	amount = (int) (semitone_tuning[semitones] * multiplier * cent_tuning[cents]) / 10000;
+
+	if (negative)
+		return (base_freq * 10000) / amount;	/* Bend down */
+	else
+		return (base_freq * amount) / 10000;	/* Bend up */
+}
+EXPORT_SYMBOL(compute_finetune);
+
+void sequencer_init(void)
+{
+	if (sequencer_ok)
+		return;
+	queue = vmalloc(SEQ_MAX_QUEUE * EV_SZ);
+	if (queue == NULL)
+	{
+		printk(KERN_ERR "sequencer: Can't allocate memory for sequencer output queue\n");
+		return;
+	}
+	iqueue = vmalloc(SEQ_MAX_QUEUE * IEV_SZ);
+	if (iqueue == NULL)
+	{
+		printk(KERN_ERR "sequencer: Can't allocate memory for sequencer input queue\n");
+		vfree(queue);
+		return;
+	}
+	sequencer_ok = 1;
+}
+EXPORT_SYMBOL(sequencer_init);
+
+void sequencer_unload(void)
+{
+	vfree(queue);
+	vfree(iqueue);
+	queue = iqueue = NULL;
+}