patch-2.1.67 linux/drivers/sound/pas2_midi.c

• Lines: 445
• Date: Sat Nov 29 10:33:21 1997
• Orig file: v2.1.66/linux/drivers/sound/pas2_midi.c
• Orig date: Wed Nov 12 13:34:27 1997

diff -u --recursive --new-file v2.1.66/linux/drivers/sound/pas2_midi.c linux/drivers/sound/pas2_midi.c
@@ -15,8 +15,7 @@
 
 #include "sound_config.h"
 
-#ifdef CONFIG_PAS
-#ifdef CONFIG_MIDI
+#if ( defined(MODULE) || defined(CONFIG_PAS) ) && defined(CONFIG_MIDI)
 
 static int      midi_busy = 0, input_opened = 0;
 static int      my_dev;
@@ -28,90 +27,86 @@
 static void     (*midi_input_intr) (int dev, unsigned char data);
 
 static int
-pas_midi_open (int dev, int mode,
-	       void            (*input) (int dev, unsigned char data),
-	       void            (*output) (int dev)
+pas_midi_open(int dev, int mode,
+	      void            (*input) (int dev, unsigned char data),
+	      void            (*output) (int dev)
 )
 {
-  int             err;
-  unsigned long   flags;
-  unsigned char   ctrl;
-
-
-  if (midi_busy)
-    {
-      printk ("PAS16: Midi busy\n");
-      return -EBUSY;
-    }
-
-  /*
-   * Reset input and output FIFO pointers
-   */
-  pas_write (0x20 | 0x40,
-	     0x178b);
-
-  save_flags (flags);
-  cli ();
-
-  if ((err = pas_set_intr (0x10)) < 0)
-    {
-      restore_flags (flags);
-      return err;
-    }
-
-  /*
-   * Enable input available and output FIFO empty interrupts
-   */
-
-  ctrl = 0;
-  input_opened = 0;
-  midi_input_intr = input;
-
-  if (mode == OPEN_READ || mode == OPEN_READWRITE)
-    {
-      ctrl |= 0x04;		/* Enable input */
-      input_opened = 1;
-    }
-
-  if (mode == OPEN_WRITE || mode == OPEN_READWRITE)
-    {
-      ctrl |= 0x08 | 0x10;	/* Enable output */
-    }
-
-  pas_write (ctrl, 0x178b);
-
-  /*
-   * Acknowledge any pending interrupts
-   */
-
-  pas_write (0xff, 0x1B88);
-
-  restore_flags (flags);
-
-  midi_busy = 1;
-  qlen = qhead = qtail = 0;
-  return 0;
+	int             err;
+	unsigned long   flags;
+	unsigned char   ctrl;
+
+
+	if (midi_busy)
+	  {
+		  printk("PAS16: Midi busy\n");
+		  return -EBUSY;
+	  }
+	/*
+	 * Reset input and output FIFO pointers
+	 */
+	pas_write(0x20 | 0x40,
+		  0x178b);
+
+	save_flags(flags);
+	cli();
+
+	if ((err = pas_set_intr(0x10)) < 0)
+	  {
+		  restore_flags(flags);
+		  return err;
+	  }
+	/*
+	 * Enable input available and output FIFO empty interrupts
+	 */
+
+	ctrl = 0;
+	input_opened = 0;
+	midi_input_intr = input;
+
+	if (mode == OPEN_READ || mode == OPEN_READWRITE)
+	  {
+		  ctrl |= 0x04;	/* Enable input */
+		  input_opened = 1;
+	  }
+	if (mode == OPEN_WRITE || mode == OPEN_READWRITE)
+	  {
+		  ctrl |= 0x08 | 0x10;	/* Enable output */
+	  }
+	pas_write(ctrl, 0x178b);
+
+	/*
+	 * Acknowledge any pending interrupts
+	 */
+
+	pas_write(0xff, 0x1B88);
+
+	restore_flags(flags);
+
+	midi_busy = 1;
+	qlen = qhead = qtail = 0;
+	return 0;
 }
 
 static void
-pas_midi_close (int dev)
+pas_midi_close(int dev)
 {
 
-  /*
-   * Reset FIFO pointers, disable intrs
-   */
-  pas_write (0x20 | 0x40, 0x178b);
+	/*
+	 * Reset FIFO pointers, disable intrs
+	 */
+	pas_write(0x20 | 0x40, 0x178b);
 
-  pas_remove_intr (0x10);
-  midi_busy = 0;
+	pas_remove_intr(0x10);
+	midi_busy = 0;
 }
 
 static int
-dump_to_midi (unsigned char midi_byte)
+dump_to_midi(unsigned char midi_byte)
 {
-  int             fifo_space, x;
+	int             fifo_space, x;
 
-  fifo_space = ((x = pas_read (0x1B89)) >> 4) & 0x0f;
+	fifo_space = ((x = pas_read(0x1B89)) >> 4) & 0x0f;
 
 /*
  * The MIDI FIFO space register and it's documentation is nonunderstandable.
@@ -121,91 +116,90 @@
  * means that the buffer is empty.
  */
 
-  if (fifo_space < 2 && fifo_space != 0)	/* Full (almost) */
-    {
-      return 0;			/* Ask upper layers to retry after some time */
-    }
-
-  pas_write (midi_byte, 0x178A);
+	if (fifo_space < 2 && fifo_space != 0)	/* Full (almost) */
+	  {
+		  return 0;	/* Ask upper layers to retry after some time */
+	  }
+	pas_write(midi_byte, 0x178A);
 
-  return 1;
+	return 1;
 }
 
 static int
-pas_midi_out (int dev, unsigned char midi_byte)
+pas_midi_out(int dev, unsigned char midi_byte)
 {
 
-  unsigned long   flags;
+	unsigned long   flags;
 
-  /*
-   * Drain the local queue first
-   */
+	/*
+	 * Drain the local queue first
+	 */
 
-  save_flags (flags);
-  cli ();
+	save_flags(flags);
+	cli();
 
-  while (qlen && dump_to_midi (tmp_queue[qhead]))
-    {
-      qlen--;
-      qhead++;
-    }
+	while (qlen && dump_to_midi(tmp_queue[qhead]))
+	  {
+		  qlen--;
+		  qhead++;
+	  }
 
-  restore_flags (flags);
+	restore_flags(flags);
 
-  /*
-   * Output the byte if the local queue is empty.
-   */
+	/*
+	 * Output the byte if the local queue is empty.
+	 */
 
-  if (!qlen)
-    if (dump_to_midi (midi_byte))
-      return 1;
+	if (!qlen)
+		if (dump_to_midi(midi_byte))
+			return 1;
 
-  /*
-   * Put to the local queue
-   */
+	/*
+	 * Put to the local queue
+	 */
 
-  if (qlen >= 256)
-    return 0;			/* Local queue full */
+	if (qlen >= 256)
+		return 0;	/* Local queue full */
 
-  save_flags (flags);
-  cli ();
+	save_flags(flags);
+	cli();
 
-  tmp_queue[qtail] = midi_byte;
-  qlen++;
-  qtail++;
+	tmp_queue[qtail] = midi_byte;
+	qlen++;
+	qtail++;
 
-  restore_flags (flags);
+	restore_flags(flags);
 
-  return 1;
+	return 1;
 }
 
 static int
-pas_midi_start_read (int dev)
+pas_midi_start_read(int dev)
 {
-  return 0;
+	return 0;
 }
 
 static int
-pas_midi_end_read (int dev)
+pas_midi_end_read(int dev)
 {
-  return 0;
+	return 0;
 }
 
 static int
-pas_midi_ioctl (int dev, unsigned cmd, caddr_t arg)
+pas_midi_ioctl(int dev, unsigned cmd, caddr_t arg)
 {
-  return -EINVAL;
+	return -EINVAL;
 }
 
 static void
-pas_midi_kick (int dev)
+pas_midi_kick(int dev)
 {
 }
 
 static int
-pas_buffer_status (int dev)
+pas_buffer_status(int dev)
 {
-  return qlen;
+	return qlen;
 }
 
 #define MIDI_SYNTH_NAME	"Pro Audio Spectrum Midi"
@@ -214,81 +208,76 @@
 
 static struct midi_operations pas_midi_operations =
 {
-  {"Pro Audio Spectrum", 0, 0, SNDCARD_PAS},
-  &std_midi_synth,
-  {0},
-  pas_midi_open,
-  pas_midi_close,
-  pas_midi_ioctl,
-  pas_midi_out,
-  pas_midi_start_read,
-  pas_midi_end_read,
-  pas_midi_kick,
-  NULL,
-  pas_buffer_status,
-  NULL
+	{"Pro Audio Spectrum", 0, 0, SNDCARD_PAS},
+	&std_midi_synth,
+	{0},
+	pas_midi_open,
+	pas_midi_close,
+	pas_midi_ioctl,
+	pas_midi_out,
+	pas_midi_start_read,
+	pas_midi_end_read,
+	pas_midi_kick,
+	NULL,
+	pas_buffer_status,
+	NULL
 };
 
 void
-pas_midi_init (void)
+pas_midi_init(void)
 {
-  if (num_midis >= MAX_MIDI_DEV)
-    {
-      printk ("Sound: Too many midi devices detected\n");
-      return;
-    }
-
-  std_midi_synth.midi_dev = my_dev = num_midis;
-  midi_devs[num_midis++] = &pas_midi_operations;
-  sequencer_init ();
+	int             dev = sound_alloc_mididev();
+
+	if (dev == -1)
+	  {
+		  printk(KERN_WARNING "pas_midi_init: Too many midi devices detected\n");
+		  return;
+	  }
+	std_midi_synth.midi_dev = my_dev = dev;
+	midi_devs[dev] = &pas_midi_operations;
+	sequencer_init();
 }
 
 void
-pas_midi_interrupt (void)
+pas_midi_interrupt(void)
 {
-  unsigned char   stat;
-  int             i, incount;
-  unsigned long   flags;
-
-  stat = pas_read (0x1B88);
-
-  if (stat & 0x04)		/* Input data available */
-    {
-      incount = pas_read (0x1B89) & 0x0f;	/* Input FIFO size */
-      if (!incount)
-	incount = 16;
+	unsigned char   stat;
+	int             i, incount;
+	unsigned long   flags;
+
+	stat = pas_read(0x1B88);
 
-      for (i = 0; i < incount; i++)
-	if (input_opened)
+	if (stat & 0x04)	/* Input data available */
 	  {
-	    midi_input_intr (my_dev, pas_read (0x178A));
+		  incount = pas_read(0x1B89) & 0x0f;	/* Input FIFO size */
+		  if (!incount)
+			  incount = 16;
+
+		  for (i = 0; i < incount; i++)
+			  if (input_opened)
+			    {
+				    midi_input_intr(my_dev, pas_read(0x178A));
+			  } else
+				  pas_read(0x178A);	/* Flush */
 	  }
-	else
-	  pas_read (0x178A);	/* Flush */
-    }
-
-  if (stat & (0x08 | 0x10))
-    {
-      save_flags (flags);
-      cli ();
-
-      while (qlen && dump_to_midi (tmp_queue[qhead]))
-	{
-	  qlen--;
-	  qhead++;
-	}
-
-      restore_flags (flags);
-    }
-
+	if (stat & (0x08 | 0x10))
+	  {
+		  save_flags(flags);
+		  cli();
 
-  if (stat & 0x40)
-    {
-      printk ("MIDI output overrun %x,%x\n", pas_read (0x1B89), stat);
-    }
+		  while (qlen && dump_to_midi(tmp_queue[qhead]))
+		    {
+			    qlen--;
+			    qhead++;
+		    }
 
-  pas_write (stat, 0x1B88);	/* Acknowledge interrupts */
+		  restore_flags(flags);
+	  }
+	if (stat & 0x40)
+	  {
+		  printk("MIDI output overrun %x,%x\n", pas_read(0x1B89), stat);
+	  }
+	pas_write(stat, 0x1B88);	/* Acknowledge interrupts */
 }
 
-#endif
 #endif