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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [drivers/] [sound/] [midi_synth.c] - Blame information for rev 1765

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/*
 * sound/midi_synth.c
 *
 * High level midi sequencer manager for dumb MIDI interfaces.
 */
/*
 * Copyright (C) by Hannu Savolainen 1993-1996
 *
 * USS/Lite 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.
 */
#include <linux/config.h>
 
 
#define USE_SEQ_MACROS
#define USE_SIMPLE_MACROS
 
#include "sound_config.h"
 
#if defined(CONFIG_MIDI)
 
#define _MIDI_SYNTH_C_
 
static wait_handle *sysex_sleeper = NULL;
static volatile struct snd_wait sysex_sleep_flag =
{0};
 
#include "midi_synth.h"
 
static int      midi2synth[MAX_MIDI_DEV];
static int      sysex_state[MAX_MIDI_DEV] =
{0};
static unsigned char prev_out_status[MAX_MIDI_DEV];
 
#ifndef CONFIG_SEQUENCER
#define STORE(cmd)
#else
#define STORE(cmd) \
{ \
  int len; \
  unsigned char obuf[8]; \
  cmd; \
  seq_input_event(obuf, len); \
}
#endif
 
#define _seqbuf obuf
#define _seqbufptr 0
#define _SEQ_ADVBUF(x) len=x
 
void
do_midi_msg (int synthno, unsigned char *msg, int mlen)
{
  switch (msg[0] & 0xf0)
    {
    case 0x90:
      if (msg[2] != 0)
        {
          STORE (SEQ_START_NOTE (synthno, msg[0] & 0x0f, msg[1], msg[2]));
          break;
        }
      msg[2] = 64;
 
    case 0x80:
      STORE (SEQ_STOP_NOTE (synthno, msg[0] & 0x0f, msg[1], msg[2]));
      break;
 
    case 0xA0:
      STORE (SEQ_KEY_PRESSURE (synthno, msg[0] & 0x0f, msg[1], msg[2]));
      break;
 
    case 0xB0:
      STORE (SEQ_CONTROL (synthno, msg[0] & 0x0f,
                          msg[1], msg[2]));
      break;
 
    case 0xC0:
      STORE (SEQ_SET_PATCH (synthno, msg[0] & 0x0f, msg[1]));
      break;
 
    case 0xD0:
      STORE (SEQ_CHN_PRESSURE (synthno, msg[0] & 0x0f, msg[1]));
      break;
 
    case 0xE0:
      STORE (SEQ_BENDER (synthno, msg[0] & 0x0f,
                         (msg[1] % 0x7f) | ((msg[2] & 0x7f) << 7)));
      break;
 
    default:
      /* printk ("MPU: Unknown midi channel message %02x\n", msg[0]); */
      ;
    }
}
 
static void
midi_outc (int midi_dev, int data)
{
  int             timeout;
 
  for (timeout = 0; timeout < 32000; timeout++)
    if (midi_devs[midi_dev]->putc (midi_dev, (unsigned char) (data & 0xff)))
      {
        if (data & 0x80)        /*
                                 * Status byte
                                 */
          prev_out_status[midi_dev] =
            (unsigned char) (data & 0xff);      /*
                                                 * Store for running status
                                                 */
        return;                 /*
                                 * Mission complete
                                 */
      }
 
  /*
   * Sorry! No space on buffers.
   */
  printk ("Midi send timed out\n");
}
 
static int
prefix_cmd (int midi_dev, unsigned char status)
{
  if ((char *) midi_devs[midi_dev]->prefix_cmd == NULL)
    return 1;
 
  return midi_devs[midi_dev]->prefix_cmd (midi_dev, status);
}
 
static void
midi_synth_input (int orig_dev, unsigned char data)
{
  int             dev;
  struct midi_input_info *inc;
 
  static unsigned char len_tab[] =      /* # of data bytes following a status
                                         */
  {
    2,                          /* 8x */
    2,                          /* 9x */
    2,                          /* Ax */
    2,                          /* Bx */
    1,                          /* Cx */
    1,                          /* Dx */
    2,                          /* Ex */
 
  };
 
  if (orig_dev < 0 || orig_dev > num_midis)
    return;
 
  if (data == 0xfe)             /* Ignore active sensing */
    return;
 
  dev = midi2synth[orig_dev];
  inc = &midi_devs[orig_dev]->in_info;
 
  switch (inc->m_state)
    {
    case MST_INIT:
      if (data & 0x80)          /* MIDI status byte */
        {
          if ((data & 0xf0) == 0xf0)    /* Common message */
            {
              switch (data)
                {
                case 0xf0:      /* Sysex */
                  inc->m_state = MST_SYSEX;
                  break;        /* Sysex */
 
                case 0xf1:      /* MTC quarter frame */
                case 0xf3:      /* Song select */
                  inc->m_state = MST_DATA;
                  inc->m_ptr = 1;
                  inc->m_left = 1;
                  inc->m_buf[0] = data;
                  break;
 
                case 0xf2:      /* Song position pointer */
                  inc->m_state = MST_DATA;
                  inc->m_ptr = 1;
                  inc->m_left = 2;
                  inc->m_buf[0] = data;
                  break;
 
                default:
                  inc->m_buf[0] = data;
                  inc->m_ptr = 1;
                  do_midi_msg (dev, inc->m_buf, inc->m_ptr);
                  inc->m_ptr = 0;
                  inc->m_left = 0;
                }
            }
          else
            {
              inc->m_state = MST_DATA;
              inc->m_ptr = 1;
              inc->m_left = len_tab[(data >> 4) - 8];
              inc->m_buf[0] = inc->m_prev_status = data;
            }
        }
      else if (inc->m_prev_status & 0x80)       /* Ignore if no previous status (yet) */
        {                       /* Data byte (use running status) */
          inc->m_state = MST_DATA;
          inc->m_ptr = 2;
          inc->m_left = len_tab[(data >> 4) - 8] - 1;
          inc->m_buf[0] = inc->m_prev_status;
          inc->m_buf[1] = data;
        }
      break;                    /* MST_INIT */
 
    case MST_DATA:
      inc->m_buf[inc->m_ptr++] = data;
      if (--inc->m_left <= 0)
        {
          inc->m_state = MST_INIT;
          do_midi_msg (dev, inc->m_buf, inc->m_ptr);
          inc->m_ptr = 0;
        }
      break;                    /* MST_DATA */
 
    case MST_SYSEX:
      if (data == 0xf7)         /* Sysex end */
        {
          inc->m_state = MST_INIT;
          inc->m_left = 0;
          inc->m_ptr = 0;
        }
      break;                    /* MST_SYSEX */
 
    default:
      printk ("MIDI%d: Unexpected state %d (%02x)\n", orig_dev, inc->m_state,
              (int) data);
      inc->m_state = MST_INIT;
    }
}
 
static void
leave_sysex (int dev)
{
  int             orig_dev = synth_devs[dev]->midi_dev;
  int             timeout = 0;
 
  if (!sysex_state[dev])
    return;
 
  sysex_state[dev] = 0;
 
  while (!midi_devs[orig_dev]->putc (orig_dev, 0xf7) &&
         timeout < 1000)
    timeout++;
 
  sysex_state[dev] = 0;
}
 
static void
midi_synth_output (int dev)
{
  /*
   * Currently NOP
   */
}
 
int
midi_synth_ioctl (int dev,
                  unsigned int cmd, caddr_t arg)
{
  /*
   * int orig_dev = synth_devs[dev]->midi_dev;
   */
 
  switch (cmd)
    {
 
    case SNDCTL_SYNTH_INFO:
      memcpy_tofs (&((char *) arg)[0], synth_devs[dev]->info, sizeof (struct synth_info));
 
      return 0;
      break;
 
    case SNDCTL_SYNTH_MEMAVL:
      return 0x7fffffff;
      break;
 
    default:
      return -(EINVAL);
    }
}
 
int
midi_synth_kill_note (int dev, int channel, int note, int velocity)
{
  int             orig_dev = synth_devs[dev]->midi_dev;
  int             msg, chn;
 
  if (note < 0 || note > 127)
    return 0;
  if (channel < 0 || channel > 15)
    return 0;
  if (velocity < 0)
    velocity = 0;
  if (velocity > 127)
    velocity = 127;
 
  leave_sysex (dev);
 
  msg = prev_out_status[orig_dev] & 0xf0;
  chn = prev_out_status[orig_dev] & 0x0f;
 
  if (chn == channel && ((msg == 0x90 && velocity == 64) || msg == 0x80))
    {                           /*
                                 * Use running status
                                 */
      if (!prefix_cmd (orig_dev, note))
        return 0;
 
      midi_outc (orig_dev, note);
 
      if (msg == 0x90)          /*
                                 * Running status = Note on
                                 */
        midi_outc (orig_dev, 0); /*
                                           * Note on with velocity 0 == note
                                           * off
                                         */
      else
        midi_outc (orig_dev, velocity);
    }
  else
    {
      if (velocity == 64)
        {
          if (!prefix_cmd (orig_dev, 0x90 | (channel & 0x0f)))
            return 0;
          midi_outc (orig_dev, 0x90 | (channel & 0x0f));        /*
                                                                 * Note on
                                                                 */
          midi_outc (orig_dev, note);
          midi_outc (orig_dev, 0);       /*
                                         * Zero G
                                         */
        }
      else
        {
          if (!prefix_cmd (orig_dev, 0x80 | (channel & 0x0f)))
            return 0;
          midi_outc (orig_dev, 0x80 | (channel & 0x0f));        /*
                                                                 * Note off
                                                                 */
          midi_outc (orig_dev, note);
          midi_outc (orig_dev, velocity);
        }
    }
 
  return 0;
}
 
int
midi_synth_set_instr (int dev, int channel, int instr_no)
{
  int             orig_dev = synth_devs[dev]->midi_dev;
 
  if (instr_no < 0 || instr_no > 127)
    return 0;
  if (channel < 0 || channel > 15)
    return 0;
 
  leave_sysex (dev);
 
  if (!prefix_cmd (orig_dev, 0xc0 | (channel & 0x0f)))
    return 0;
  midi_outc (orig_dev, 0xc0 | (channel & 0x0f));        /*
                                                         * Program change
                                                         */
  midi_outc (orig_dev, instr_no);
 
  return 0;
}
 
int
midi_synth_start_note (int dev, int channel, int note, int velocity)
{
  int             orig_dev = synth_devs[dev]->midi_dev;
  int             msg, chn;
 
  if (note < 0 || note > 127)
    return 0;
  if (channel < 0 || channel > 15)
    return 0;
  if (velocity < 0)
    velocity = 0;
  if (velocity > 127)
    velocity = 127;
 
  leave_sysex (dev);
 
  msg = prev_out_status[orig_dev] & 0xf0;
  chn = prev_out_status[orig_dev] & 0x0f;
 
  if (chn == channel && msg == 0x90)
    {                           /*
                                 * Use running status
                                 */
      if (!prefix_cmd (orig_dev, note))
        return 0;
      midi_outc (orig_dev, note);
      midi_outc (orig_dev, velocity);
    }
  else
    {
      if (!prefix_cmd (orig_dev, 0x90 | (channel & 0x0f)))
        return 0;
      midi_outc (orig_dev, 0x90 | (channel & 0x0f));    /*
                                                         * Note on
                                                         */
      midi_outc (orig_dev, note);
      midi_outc (orig_dev, velocity);
    }
  return 0;
}
 
void
midi_synth_reset (int dev)
{
 
  leave_sysex (dev);
}
 
int
midi_synth_open (int dev, int mode)
{
  int             orig_dev = synth_devs[dev]->midi_dev;
  int             err;
  unsigned long   flags;
  struct midi_input_info *inc;
 
  if (orig_dev < 0 || orig_dev > num_midis)
    return -(ENXIO);
 
  midi2synth[orig_dev] = dev;
  sysex_state[dev] = 0;
  prev_out_status[orig_dev] = 0;
 
  if ((err = midi_devs[orig_dev]->open (orig_dev, mode,
                                  midi_synth_input, midi_synth_output)) < 0)
    return err;
 
  inc = &midi_devs[orig_dev]->in_info;
 
  save_flags (flags);
  cli ();
  inc->m_busy = 0;
  inc->m_state = MST_INIT;
  inc->m_ptr = 0;
  inc->m_left = 0;
  inc->m_prev_status = 0x00;
  restore_flags (flags);
 
  sysex_sleep_flag.flags = WK_NONE;
 
  return 1;
}
 
void
midi_synth_close (int dev)
{
  int             orig_dev = synth_devs[dev]->midi_dev;
 
  leave_sysex (dev);
 
  /*
   * Shut up the synths by sending just single active sensing message.
   */
  midi_devs[orig_dev]->putc (orig_dev, 0xfe);
 
  midi_devs[orig_dev]->close (orig_dev);
}
 
void
midi_synth_hw_control (int dev, unsigned char *event)
{
}
 
int
midi_synth_load_patch (int dev, int format, const char *addr,
                       int offs, int count, int pmgr_flag)
{
  int             orig_dev = synth_devs[dev]->midi_dev;
 
  struct sysex_info sysex;
  int             i;
  unsigned long   left, src_offs, eox_seen = 0;
  int             first_byte = 1;
  int             hdr_size = (unsigned long) &sysex.data[0] - (unsigned long) &sysex;
 
  leave_sysex (dev);
 
  if (!prefix_cmd (orig_dev, 0xf0))
    return 0;
 
  if (format != SYSEX_PATCH)
    {
      printk ("MIDI Error: Invalid patch format (key) 0x%x\n", format);
      return -(EINVAL);
    }
 
  if (count < hdr_size)
    {
      printk ("MIDI Error: Patch header too short\n");
      return -(EINVAL);
    }
 
  count -= hdr_size;
 
  /*
   * Copy the header from user space but ignore the first bytes which have
   * been transferred already.
   */
 
  memcpy_fromfs (&((char *) &sysex)[offs], &(addr)[offs], hdr_size - offs);
 
  if (count < sysex.len)
    {
      printk ("MIDI Warning: Sysex record too short (%d<%d)\n",
              count, (int) sysex.len);
      sysex.len = count;
    }
 
  left = sysex.len;
  src_offs = 0;
 
  sysex_sleep_flag.flags = WK_NONE;
 
  for (i = 0; i < left && !current_got_fatal_signal (); i++)
    {
      unsigned char   data;
 
      data = get_fs_byte (&((addr)[hdr_size + i]));
 
      eox_seen = (i > 0 && data & 0x80); /* End of sysex */
 
      if (eox_seen && data != 0xf7)
        data = 0xf7;
 
      if (i == 0)
        {
          if (data != 0xf0)
            {
              printk ("Error: Sysex start missing\n");
              return -(EINVAL);
            }
        }
 
      while (!midi_devs[orig_dev]->putc (orig_dev, (unsigned char) (data & 0xff)) &&
             !current_got_fatal_signal ())
 
        {
          unsigned long   tlimit;
 
          if (1)
            current_set_timeout (tlimit = jiffies + (1));
          else
            tlimit = (unsigned long) -1;
          sysex_sleep_flag.flags = WK_SLEEP;
          module_interruptible_sleep_on (&sysex_sleeper);
          if (!(sysex_sleep_flag.flags & WK_WAKEUP))
            {
              if (jiffies >= tlimit)
                sysex_sleep_flag.flags |= WK_TIMEOUT;
            }
          sysex_sleep_flag.flags &= ~WK_SLEEP;
        };                      /* Wait for timeout */
 
      if (!first_byte && data & 0x80)
        return 0;
      first_byte = 0;
    }
 
  if (!eox_seen)
    midi_outc (orig_dev, 0xf7);
  return 0;
}
 
void
midi_synth_panning (int dev, int channel, int pressure)
{
}
 
void
midi_synth_aftertouch (int dev, int channel, int pressure)
{
  int             orig_dev = synth_devs[dev]->midi_dev;
  int             msg, chn;
 
  if (pressure < 0 || pressure > 127)
    return;
  if (channel < 0 || channel > 15)
    return;
 
  leave_sysex (dev);
 
  msg = prev_out_status[orig_dev] & 0xf0;
  chn = prev_out_status[orig_dev] & 0x0f;
 
  if (msg != 0xd0 || chn != channel)    /*
                                         * Test for running status
                                         */
    {
      if (!prefix_cmd (orig_dev, 0xd0 | (channel & 0x0f)))
        return;
      midi_outc (orig_dev, 0xd0 | (channel & 0x0f));    /*
                                                         * Channel pressure
                                                         */
    }
  else if (!prefix_cmd (orig_dev, pressure))
    return;
 
  midi_outc (orig_dev, pressure);
}
 
void
midi_synth_controller (int dev, int channel, int ctrl_num, int value)
{
  int             orig_dev = synth_devs[dev]->midi_dev;
  int             chn, msg;
 
  if (ctrl_num < 0 || ctrl_num > 127)
    return;
  if (channel < 0 || channel > 15)
    return;
 
  leave_sysex (dev);
 
  msg = prev_out_status[orig_dev] & 0xf0;
  chn = prev_out_status[orig_dev] & 0x0f;
 
  if (msg != 0xb0 || chn != channel)
    {
      if (!prefix_cmd (orig_dev, 0xb0 | (channel & 0x0f)))
        return;
      midi_outc (orig_dev, 0xb0 | (channel & 0x0f));
    }
  else if (!prefix_cmd (orig_dev, ctrl_num))
    return;
 
  midi_outc (orig_dev, ctrl_num);
  midi_outc (orig_dev, value & 0x7f);
}
 
int
midi_synth_patchmgr (int dev, struct patmgr_info *rec)
{
  return -(EINVAL);
}
 
void
midi_synth_bender (int dev, int channel, int value)
{
  int             orig_dev = synth_devs[dev]->midi_dev;
  int             msg, prev_chn;
 
  if (channel < 0 || channel > 15)
    return;
 
  if (value < 0 || value > 16383)
    return;
 
  leave_sysex (dev);
 
  msg = prev_out_status[orig_dev] & 0xf0;
  prev_chn = prev_out_status[orig_dev] & 0x0f;
 
  if (msg != 0xd0 || prev_chn != channel)       /*
                                                 * Test for running status
                                                 */
    {
      if (!prefix_cmd (orig_dev, 0xe0 | (channel & 0x0f)))
        return;
      midi_outc (orig_dev, 0xe0 | (channel & 0x0f));
    }
  else if (!prefix_cmd (orig_dev, value & 0x7f))
    return;
 
  midi_outc (orig_dev, value & 0x7f);
  midi_outc (orig_dev, (value >> 7) & 0x7f);
}
 
void
midi_synth_setup_voice (int dev, int voice, int channel)
{
}
 
int
midi_synth_send_sysex (int dev, unsigned char *bytes, int len)
{
  int             orig_dev = synth_devs[dev]->midi_dev;
  int             i;
 
  for (i = 0; i < len; i++)
    {
      switch (bytes[i])
        {
        case 0xf0:              /* Start sysex */
          if (!prefix_cmd (orig_dev, 0xf0))
            return 0;
          sysex_state[dev] = 1;
          break;
 
        case 0xf7:              /* End sysex */
          if (!sysex_state[dev])        /* Orphan sysex end */
            return 0;
          sysex_state[dev] = 0;
          break;
 
        default:
          if (!sysex_state[dev])
            return 0;
 
          if (bytes[i] & 0x80)  /* Error. Another message before sysex end */
            {
              bytes[i] = 0xf7;  /* Sysex end */
              sysex_state[dev] = 0;
            }
        }
 
      if (!midi_devs[orig_dev]->putc (orig_dev, bytes[i]))
        {
/*
 * Hardware level buffer is full. Abort the sysex message.
 */
 
          int             timeout = 0;
 
          bytes[i] = 0xf7;
          sysex_state[dev] = 0;
 
          while (!midi_devs[orig_dev]->putc (orig_dev, bytes[i]) &&
                 timeout < 1000)
            timeout++;
        }
 
      if (!sysex_state[dev])
        return 0;
    }
 
  return 0;
}
 
#endif

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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [drivers/] [sound/] [midi_synth.c] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	1626	jcastillo	`/*`
2			`* sound/midi_synth.c`
3			`*`
4			`* High level midi sequencer manager for dumb MIDI interfaces.`
5			`*/`
6			`/*`
7			`* Copyright (C) by Hannu Savolainen 1993-1996`
8			`*`
9			`* USS/Lite for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)`
10			`* Version 2 (June 1991). See the "COPYING" file distributed with this software`
11			`* for more info.`
12			`*/`
13			`#include <linux/config.h>`
14
15
16			`#define USE_SEQ_MACROS`
17			`#define USE_SIMPLE_MACROS`
18
19			`#include "sound_config.h"`
20
21			`#if defined(CONFIG_MIDI)`
22
23			`#define _MIDI_SYNTH_C_`
24
25			`static wait_handle *sysex_sleeper = NULL;`
26			`static volatile struct snd_wait sysex_sleep_flag =`
27			`{0};`
28
29			`#include "midi_synth.h"`
30
31			`static int midi2synth[MAX_MIDI_DEV];`
32			`static int sysex_state[MAX_MIDI_DEV] =`
33			`{0};`
34			`static unsigned char prev_out_status[MAX_MIDI_DEV];`
35
36			`#ifndef CONFIG_SEQUENCER`
37			`#define STORE(cmd)`
38			`#else`
39			`#define STORE(cmd) \`
40			`{ \`
41			`int len; \`
42			`unsigned char obuf[8]; \`
43			`cmd; \`
44			`seq_input_event(obuf, len); \`
45			`}`
46			`#endif`
47
48			`#define _seqbuf obuf`
49			`#define _seqbufptr 0`
50			`#define _SEQ_ADVBUF(x) len=x`
51
52			`void`
53			`do_midi_msg (int synthno, unsigned char *msg, int mlen)`
54			`{`
55			`switch (msg[0] & 0xf0)`
56			`{`
57			`case 0x90:`
58			`if (msg[2] != 0)`
59			`{`
60			`STORE (SEQ_START_NOTE (synthno, msg[0] & 0x0f, msg[1], msg[2]));`
61			`break;`
62			`}`
63			`msg[2] = 64;`
64
65			`case 0x80:`
66			`STORE (SEQ_STOP_NOTE (synthno, msg[0] & 0x0f, msg[1], msg[2]));`
67			`break;`
68
69			`case 0xA0:`
70			`STORE (SEQ_KEY_PRESSURE (synthno, msg[0] & 0x0f, msg[1], msg[2]));`
71			`break;`
72
73			`case 0xB0:`
74			`STORE (SEQ_CONTROL (synthno, msg[0] & 0x0f,`
75			`msg[1], msg[2]));`
76			`break;`
77
78			`case 0xC0:`
79			`STORE (SEQ_SET_PATCH (synthno, msg[0] & 0x0f, msg[1]));`
80			`break;`
81
82			`case 0xD0:`
83			`STORE (SEQ_CHN_PRESSURE (synthno, msg[0] & 0x0f, msg[1]));`
84			`break;`
85
86			`case 0xE0:`
87			`STORE (SEQ_BENDER (synthno, msg[0] & 0x0f,`
88			`(msg[1] % 0x7f) \| ((msg[2] & 0x7f) << 7)));`
89			`break;`
90
91			`default:`
92			`/* printk ("MPU: Unknown midi channel message %02x\n", msg[0]); */`
93			`;`
94			`}`
95			`}`
96
97			`static void`
98			`midi_outc (int midi_dev, int data)`
99			`{`
100			`int timeout;`
101
102			`for (timeout = 0; timeout < 32000; timeout++)`
103			`if (midi_devs[midi_dev]->putc (midi_dev, (unsigned char) (data & 0xff)))`
104			`{`
105			`if (data & 0x80) /*`
106			`* Status byte`
107			`*/`
108			`prev_out_status[midi_dev] =`
109			`(unsigned char) (data & 0xff); /*`
110			`* Store for running status`
111			`*/`
112			`return; /*`
113			`* Mission complete`
114			`*/`
115			`}`
116
117			`/*`
118			`* Sorry! No space on buffers.`
119			`*/`
120			`printk ("Midi send timed out\n");`
121			`}`
122
123			`static int`
124			`prefix_cmd (int midi_dev, unsigned char status)`
125			`{`
126			`if ((char *) midi_devs[midi_dev]->prefix_cmd == NULL)`
127			`return 1;`
128
129			`return midi_devs[midi_dev]->prefix_cmd (midi_dev, status);`
130			`}`
131
132			`static void`
133			`midi_synth_input (int orig_dev, unsigned char data)`
134			`{`
135			`int dev;`
136			`struct midi_input_info *inc;`
137
138			`static unsigned char len_tab[] = /* # of data bytes following a status`
139			`*/`
140			`{`
141			`2, /* 8x */`
142			`2, /* 9x */`
143			`2, /* Ax */`
144			`2, /* Bx */`
145			`1, /* Cx */`
146			`1, /* Dx */`
147			`2, /* Ex */`
148
149			`};`
150
151			`if (orig_dev < 0 \|\| orig_dev > num_midis)`
152			`return;`
153
154			`if (data == 0xfe) /* Ignore active sensing */`
155			`return;`
156
157			`dev = midi2synth[orig_dev];`
158			`inc = &midi_devs[orig_dev]->in_info;`
159
160			`switch (inc->m_state)`
161			`{`
162			`case MST_INIT:`
163			`if (data & 0x80) /* MIDI status byte */`
164			`{`
165			`if ((data & 0xf0) == 0xf0) /* Common message */`
166			`{`
167			`switch (data)`
168			`{`
169			`case 0xf0: /* Sysex */`
170			`inc->m_state = MST_SYSEX;`
171			`break; /* Sysex */`
172
173			`case 0xf1: /* MTC quarter frame */`
174			`case 0xf3: /* Song select */`
175			`inc->m_state = MST_DATA;`
176			`inc->m_ptr = 1;`
177			`inc->m_left = 1;`
178			`inc->m_buf[0] = data;`
179			`break;`
180
181			`case 0xf2: /* Song position pointer */`
182			`inc->m_state = MST_DATA;`
183			`inc->m_ptr = 1;`
184			`inc->m_left = 2;`
185			`inc->m_buf[0] = data;`
186			`break;`
187
188			`default:`
189			`inc->m_buf[0] = data;`
190			`inc->m_ptr = 1;`
191			`do_midi_msg (dev, inc->m_buf, inc->m_ptr);`
192			`inc->m_ptr = 0;`
193			`inc->m_left = 0;`
194			`}`
195			`}`
196			`else`
197			`{`
198			`inc->m_state = MST_DATA;`
199			`inc->m_ptr = 1;`
200			`inc->m_left = len_tab[(data >> 4) - 8];`
201			`inc->m_buf[0] = inc->m_prev_status = data;`
202			`}`
203			`}`
204			`else if (inc->m_prev_status & 0x80) /* Ignore if no previous status (yet) */`
205			`{ /* Data byte (use running status) */`
206			`inc->m_state = MST_DATA;`
207			`inc->m_ptr = 2;`
208			`inc->m_left = len_tab[(data >> 4) - 8] - 1;`
209			`inc->m_buf[0] = inc->m_prev_status;`
210			`inc->m_buf[1] = data;`
211			`}`
212			`break; /* MST_INIT */`
213
214			`case MST_DATA:`
215			`inc->m_buf[inc->m_ptr++] = data;`
216			`if (--inc->m_left <= 0)`
217			`{`
218			`inc->m_state = MST_INIT;`
219			`do_midi_msg (dev, inc->m_buf, inc->m_ptr);`
220			`inc->m_ptr = 0;`
221			`}`
222			`break; /* MST_DATA */`
223
224			`case MST_SYSEX:`
225			`if (data == 0xf7) /* Sysex end */`
226			`{`
227			`inc->m_state = MST_INIT;`
228			`inc->m_left = 0;`
229			`inc->m_ptr = 0;`
230			`}`
231			`break; /* MST_SYSEX */`
232
233			`default:`
234			`printk ("MIDI%d: Unexpected state %d (%02x)\n", orig_dev, inc->m_state,`
235			`(int) data);`
236			`inc->m_state = MST_INIT;`
237			`}`
238			`}`
239
240			`static void`
241			`leave_sysex (int dev)`
242			`{`
243			`int orig_dev = synth_devs[dev]->midi_dev;`
244			`int timeout = 0;`
245
246			`if (!sysex_state[dev])`
247			`return;`
248
249			`sysex_state[dev] = 0;`
250
251			`while (!midi_devs[orig_dev]->putc (orig_dev, 0xf7) &&`
252			`timeout < 1000)`
253			`timeout++;`
254
255			`sysex_state[dev] = 0;`
256			`}`
257
258			`static void`
259			`midi_synth_output (int dev)`
260			`{`
261			`/*`
262			`* Currently NOP`
263			`*/`
264			`}`
265
266			`int`
267			`midi_synth_ioctl (int dev,`
268			`unsigned int cmd, caddr_t arg)`
269			`{`
270			`/*`
271			`* int orig_dev = synth_devs[dev]->midi_dev;`
272			`*/`
273
274			`switch (cmd)`
275			`{`
276
277			`case SNDCTL_SYNTH_INFO:`
278			`memcpy_tofs (&((char *) arg)[0], synth_devs[dev]->info, sizeof (struct synth_info));`
279
280			`return 0;`
281			`break;`
282
283			`case SNDCTL_SYNTH_MEMAVL:`
284			`return 0x7fffffff;`
285			`break;`
286
287			`default:`
288			`return -(EINVAL);`
289			`}`
290			`}`
291
292			`int`
293			`midi_synth_kill_note (int dev, int channel, int note, int velocity)`
294			`{`
295			`int orig_dev = synth_devs[dev]->midi_dev;`
296			`int msg, chn;`
297
298			`if (note < 0 \|\| note > 127)`
299			`return 0;`
300			`if (channel < 0 \|\| channel > 15)`
301			`return 0;`
302			`if (velocity < 0)`
303			`velocity = 0;`
304			`if (velocity > 127)`
305			`velocity = 127;`
306
307			`leave_sysex (dev);`
308
309			`msg = prev_out_status[orig_dev] & 0xf0;`
310			`chn = prev_out_status[orig_dev] & 0x0f;`
311
312			`if (chn == channel && ((msg == 0x90 && velocity == 64) \|\| msg == 0x80))`
313			`{ /*`
314			`* Use running status`
315			`*/`
316			`if (!prefix_cmd (orig_dev, note))`
317			`return 0;`
318
319			`midi_outc (orig_dev, note);`
320
321			`if (msg == 0x90) /*`
322			`* Running status = Note on`
323			`*/`
324			`midi_outc (orig_dev, 0); /*`
325			`* Note on with velocity 0 == note`
326			`* off`
327			`*/`
328			`else`
329			`midi_outc (orig_dev, velocity);`
330			`}`
331			`else`
332			`{`
333			`if (velocity == 64)`
334			`{`
335			`if (!prefix_cmd (orig_dev, 0x90 \| (channel & 0x0f)))`
336			`return 0;`
337			`midi_outc (orig_dev, 0x90 \| (channel & 0x0f)); /*`
338			`* Note on`
339			`*/`
340			`midi_outc (orig_dev, note);`
341			`midi_outc (orig_dev, 0); /*`
342			`* Zero G`
343			`*/`
344			`}`
345			`else`
346			`{`
347			`if (!prefix_cmd (orig_dev, 0x80 \| (channel & 0x0f)))`
348			`return 0;`
349			`midi_outc (orig_dev, 0x80 \| (channel & 0x0f)); /*`
350			`* Note off`
351			`*/`
352			`midi_outc (orig_dev, note);`
353			`midi_outc (orig_dev, velocity);`
354			`}`
355			`}`
356
357			`return 0;`
358			`}`
359
360			`int`
361			`midi_synth_set_instr (int dev, int channel, int instr_no)`
362			`{`
363			`int orig_dev = synth_devs[dev]->midi_dev;`
364
365			`if (instr_no < 0 \|\| instr_no > 127)`
366			`return 0;`
367			`if (channel < 0 \|\| channel > 15)`
368			`return 0;`
369
370			`leave_sysex (dev);`
371
372			`if (!prefix_cmd (orig_dev, 0xc0 \| (channel & 0x0f)))`
373			`return 0;`
374			`midi_outc (orig_dev, 0xc0 \| (channel & 0x0f)); /*`
375			`* Program change`
376			`*/`
377			`midi_outc (orig_dev, instr_no);`
378
379			`return 0;`
380			`}`
381
382			`int`
383			`midi_synth_start_note (int dev, int channel, int note, int velocity)`
384			`{`
385			`int orig_dev = synth_devs[dev]->midi_dev;`
386			`int msg, chn;`
387
388			`if (note < 0 \|\| note > 127)`
389			`return 0;`
390			`if (channel < 0 \|\| channel > 15)`
391			`return 0;`
392			`if (velocity < 0)`
393			`velocity = 0;`
394			`if (velocity > 127)`
395			`velocity = 127;`
396
397			`leave_sysex (dev);`
398
399			`msg = prev_out_status[orig_dev] & 0xf0;`
400			`chn = prev_out_status[orig_dev] & 0x0f;`
401
402			`if (chn == channel && msg == 0x90)`
403			`{ /*`
404			`* Use running status`
405			`*/`
406			`if (!prefix_cmd (orig_dev, note))`
407			`return 0;`
408			`midi_outc (orig_dev, note);`
409			`midi_outc (orig_dev, velocity);`
410			`}`
411			`else`
412			`{`
413			`if (!prefix_cmd (orig_dev, 0x90 \| (channel & 0x0f)))`
414			`return 0;`
415			`midi_outc (orig_dev, 0x90 \| (channel & 0x0f)); /*`
416			`* Note on`
417			`*/`
418			`midi_outc (orig_dev, note);`
419			`midi_outc (orig_dev, velocity);`
420			`}`
421			`return 0;`
422			`}`
423
424			`void`
425			`midi_synth_reset (int dev)`
426			`{`
427
428			`leave_sysex (dev);`
429			`}`
430
431			`int`
432			`midi_synth_open (int dev, int mode)`
433			`{`
434			`int orig_dev = synth_devs[dev]->midi_dev;`
435			`int err;`
436			`unsigned long flags;`
437			`struct midi_input_info *inc;`
438
439			`if (orig_dev < 0 \|\| orig_dev > num_midis)`
440			`return -(ENXIO);`
441
442			`midi2synth[orig_dev] = dev;`
443			`sysex_state[dev] = 0;`
444			`prev_out_status[orig_dev] = 0;`
445
446			`if ((err = midi_devs[orig_dev]->open (orig_dev, mode,`
447			`midi_synth_input, midi_synth_output)) < 0)`
448			`return err;`
449
450			`inc = &midi_devs[orig_dev]->in_info;`
451
452			`save_flags (flags);`
453			`cli ();`
454			`inc->m_busy = 0;`
455			`inc->m_state = MST_INIT;`
456			`inc->m_ptr = 0;`
457			`inc->m_left = 0;`
458			`inc->m_prev_status = 0x00;`
459			`restore_flags (flags);`
460
461			`sysex_sleep_flag.flags = WK_NONE;`
462
463			`return 1;`
464			`}`
465
466			`void`
467			`midi_synth_close (int dev)`
468			`{`
469			`int orig_dev = synth_devs[dev]->midi_dev;`
470
471			`leave_sysex (dev);`
472
473			`/*`
474			`* Shut up the synths by sending just single active sensing message.`
475			`*/`
476			`midi_devs[orig_dev]->putc (orig_dev, 0xfe);`
477
478			`midi_devs[orig_dev]->close (orig_dev);`
479			`}`
480
481			`void`
482			`midi_synth_hw_control (int dev, unsigned char *event)`
483			`{`
484			`}`
485
486			`int`
487			`midi_synth_load_patch (int dev, int format, const char *addr,`
488			`int offs, int count, int pmgr_flag)`
489			`{`
490			`int orig_dev = synth_devs[dev]->midi_dev;`
491
492			`struct sysex_info sysex;`
493			`int i;`
494			`unsigned long left, src_offs, eox_seen = 0;`
495			`int first_byte = 1;`
496			`int hdr_size = (unsigned long) &sysex.data[0] - (unsigned long) &sysex;`
497
498			`leave_sysex (dev);`
499
500			`if (!prefix_cmd (orig_dev, 0xf0))`
501			`return 0;`
502
503			`if (format != SYSEX_PATCH)`
504			`{`
505			`printk ("MIDI Error: Invalid patch format (key) 0x%x\n", format);`
506			`return -(EINVAL);`
507			`}`
508
509			`if (count < hdr_size)`
510			`{`
511			`printk ("MIDI Error: Patch header too short\n");`
512			`return -(EINVAL);`
513			`}`
514
515			`count -= hdr_size;`
516
517			`/*`
518			`* Copy the header from user space but ignore the first bytes which have`
519			`* been transferred already.`
520			`*/`
521
522			`memcpy_fromfs (&((char *) &sysex)[offs], &(addr)[offs], hdr_size - offs);`
523
524			`if (count < sysex.len)`
525			`{`
526			`printk ("MIDI Warning: Sysex record too short (%d<%d)\n",`
527			`count, (int) sysex.len);`
528			`sysex.len = count;`
529			`}`
530
531			`left = sysex.len;`
532			`src_offs = 0;`
533
534			`sysex_sleep_flag.flags = WK_NONE;`
535
536			`for (i = 0; i < left && !current_got_fatal_signal (); i++)`
537			`{`
538			`unsigned char data;`
539
540			`data = get_fs_byte (&((addr)[hdr_size + i]));`
541
542			`eox_seen = (i > 0 && data & 0x80); /* End of sysex */`
543
544			`if (eox_seen && data != 0xf7)`
545			`data = 0xf7;`
546
547			`if (i == 0)`
548			`{`
549			`if (data != 0xf0)`
550			`{`
551			`printk ("Error: Sysex start missing\n");`
552			`return -(EINVAL);`
553			`}`
554			`}`
555
556			`while (!midi_devs[orig_dev]->putc (orig_dev, (unsigned char) (data & 0xff)) &&`
557			`!current_got_fatal_signal ())`
558
559			`{`
560			`unsigned long tlimit;`
561
562			`if (1)`
563			`current_set_timeout (tlimit = jiffies + (1));`
564			`else`
565			`tlimit = (unsigned long) -1;`
566			`sysex_sleep_flag.flags = WK_SLEEP;`
567			`module_interruptible_sleep_on (&sysex_sleeper);`
568			`if (!(sysex_sleep_flag.flags & WK_WAKEUP))`
569			`{`
570			`if (jiffies >= tlimit)`
571			`sysex_sleep_flag.flags \|= WK_TIMEOUT;`
572			`}`
573			`sysex_sleep_flag.flags &= ~WK_SLEEP;`
574			`}; /* Wait for timeout */`
575
576			`if (!first_byte && data & 0x80)`
577			`return 0;`
578			`first_byte = 0;`
579			`}`
580
581			`if (!eox_seen)`
582			`midi_outc (orig_dev, 0xf7);`
583			`return 0;`
584			`}`
585
586			`void`
587			`midi_synth_panning (int dev, int channel, int pressure)`
588			`{`
589			`}`
590
591			`void`
592			`midi_synth_aftertouch (int dev, int channel, int pressure)`
593			`{`
594			`int orig_dev = synth_devs[dev]->midi_dev;`
595			`int msg, chn;`
596
597			`if (pressure < 0 \|\| pressure > 127)`
598			`return;`
599			`if (channel < 0 \|\| channel > 15)`
600			`return;`
601
602			`leave_sysex (dev);`
603
604			`msg = prev_out_status[orig_dev] & 0xf0;`
605			`chn = prev_out_status[orig_dev] & 0x0f;`
606
607			`if (msg != 0xd0 \|\| chn != channel) /*`
608			`* Test for running status`
609			`*/`
610			`{`
611			`if (!prefix_cmd (orig_dev, 0xd0 \| (channel & 0x0f)))`
612			`return;`
613			`midi_outc (orig_dev, 0xd0 \| (channel & 0x0f)); /*`
614			`* Channel pressure`
615			`*/`
616			`}`
617			`else if (!prefix_cmd (orig_dev, pressure))`
618			`return;`
619
620			`midi_outc (orig_dev, pressure);`
621			`}`
622
623			`void`
624			`midi_synth_controller (int dev, int channel, int ctrl_num, int value)`
625			`{`
626			`int orig_dev = synth_devs[dev]->midi_dev;`
627			`int chn, msg;`
628
629			`if (ctrl_num < 0 \|\| ctrl_num > 127)`
630			`return;`
631			`if (channel < 0 \|\| channel > 15)`
632			`return;`
633
634			`leave_sysex (dev);`
635
636			`msg = prev_out_status[orig_dev] & 0xf0;`
637			`chn = prev_out_status[orig_dev] & 0x0f;`
638
639			`if (msg != 0xb0 \|\| chn != channel)`
640			`{`
641			`if (!prefix_cmd (orig_dev, 0xb0 \| (channel & 0x0f)))`
642			`return;`
643			`midi_outc (orig_dev, 0xb0 \| (channel & 0x0f));`
644			`}`
645			`else if (!prefix_cmd (orig_dev, ctrl_num))`
646			`return;`
647
648			`midi_outc (orig_dev, ctrl_num);`
649			`midi_outc (orig_dev, value & 0x7f);`
650			`}`
651
652			`int`
653			`midi_synth_patchmgr (int dev, struct patmgr_info *rec)`
654			`{`
655			`return -(EINVAL);`
656			`}`
657
658			`void`
659			`midi_synth_bender (int dev, int channel, int value)`
660			`{`
661			`int orig_dev = synth_devs[dev]->midi_dev;`
662			`int msg, prev_chn;`
663
664			`if (channel < 0 \|\| channel > 15)`
665			`return;`
666
667			`if (value < 0 \|\| value > 16383)`
668			`return;`
669
670			`leave_sysex (dev);`
671
672			`msg = prev_out_status[orig_dev] & 0xf0;`
673			`prev_chn = prev_out_status[orig_dev] & 0x0f;`
674
675			`if (msg != 0xd0 \|\| prev_chn != channel) /*`
676			`* Test for running status`
677			`*/`
678			`{`
679			`if (!prefix_cmd (orig_dev, 0xe0 \| (channel & 0x0f)))`
680			`return;`
681			`midi_outc (orig_dev, 0xe0 \| (channel & 0x0f));`
682			`}`
683			`else if (!prefix_cmd (orig_dev, value & 0x7f))`
684			`return;`
685
686			`midi_outc (orig_dev, value & 0x7f);`
687			`midi_outc (orig_dev, (value >> 7) & 0x7f);`
688			`}`
689
690			`void`
691			`midi_synth_setup_voice (int dev, int voice, int channel)`
692			`{`
693			`}`
694
695			`int`
696			`midi_synth_send_sysex (int dev, unsigned char *bytes, int len)`
697			`{`
698			`int orig_dev = synth_devs[dev]->midi_dev;`
699			`int i;`
700
701			`for (i = 0; i < len; i++)`
702			`{`
703			`switch (bytes[i])`
704			`{`
705			`case 0xf0: /* Start sysex */`
706			`if (!prefix_cmd (orig_dev, 0xf0))`
707			`return 0;`
708			`sysex_state[dev] = 1;`
709			`break;`
710
711			`case 0xf7: /* End sysex */`
712			`if (!sysex_state[dev]) /* Orphan sysex end */`
713			`return 0;`
714			`sysex_state[dev] = 0;`
715			`break;`
716
717			`default:`
718			`if (!sysex_state[dev])`
719			`return 0;`
720
721			`if (bytes[i] & 0x80) /* Error. Another message before sysex end */`
722			`{`
723			`bytes[i] = 0xf7; /* Sysex end */`
724			`sysex_state[dev] = 0;`
725			`}`
726			`}`
727
728			`if (!midi_devs[orig_dev]->putc (orig_dev, bytes[i]))`
729			`{`
730			`/*`
731			`* Hardware level buffer is full. Abort the sysex message.`
732			`*/`
733
734			`int timeout = 0;`
735
736			`bytes[i] = 0xf7;`
737			`sysex_state[dev] = 0;`
738
739			`while (!midi_devs[orig_dev]->putc (orig_dev, bytes[i]) &&`
740			`timeout < 1000)`
741			`timeout++;`
742			`}`
743
744			`if (!sysex_state[dev])`
745			`return 0;`
746			`}`
747
748			`return 0;`
749			`}`
750
751			`#endif`