patch-2.0.1 linux/drivers/sound/sb16_midi.c

• Lines: 365
• Date: Thu Jan 1 02:00:00 1970
• Orig file: v2.0.0/linux/drivers/sound/sb16_midi.c
• Orig date: Sun Mar 24 22:50:18 1996

diff -u --recursive --new-file v2.0.0/linux/drivers/sound/sb16_midi.c linux/drivers/sound/sb16_midi.c
@@ -1,364 +0,0 @@
-/*
- * sound/sb16_midi.c
- *
- * The low level driver for the MPU-401 UART emulation of the SB16.
- */
-/*
- * Copyright by Hannu Savolainen 1993-1996
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met: 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer. 2.
- * Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-#include <linux/config.h>
-
-
-#include "sound_config.h"
-
-#if defined(CONFIG_SB) && defined(CONFIG_MIDI)
-
-#include "sb.h"
-
-#define	DATAPORT   (sb16midi_base)
-#define	COMDPORT   (sb16midi_base+1)
-#define	STATPORT   (sb16midi_base+1)
-
-extern int     *sb_osp;
-static int      sb16midi_base = 0;
-
-static int 
-sb16midi_status (void)
-{
-  return inb (STATPORT);
-}
-#define input_avail()		(!(sb16midi_status()&INPUT_AVAIL))
-#define output_ready()		(!(sb16midi_status()&OUTPUT_READY))
-static void 
-sb16midi_cmd (unsigned char cmd)
-{
-  outb (cmd, COMDPORT);
-}
-static int 
-sb16midi_read (void)
-{
-  return inb (DATAPORT);
-}
-static void 
-sb16midi_write (unsigned char byte)
-{
-  outb (byte, DATAPORT);
-}
-
-#define	OUTPUT_READY	0x40
-#define	INPUT_AVAIL	0x80
-#define	MPU_ACK		0xFE
-#define	MPU_RESET	0xFF
-#define	UART_MODE_ON	0x3F
-
-static int      sb16midi_opened = 0;
-static int      sb16midi_detected = 0;
-static int      my_dev;
-extern int      sbc_base;
-
-extern int      Jazz16_detected;
-extern int      AudioDrive;
-
-static int      reset_sb16midi (void);
-static void     (*midi_input_intr) (int dev, unsigned char data);
-static volatile unsigned char input_byte;
-
-static void
-sb16midi_input_loop (void)
-{
-  while (input_avail ())
-    {
-      unsigned char   c = sb16midi_read ();
-
-      if (c == MPU_ACK)
-	input_byte = c;
-      else if (sb16midi_opened & OPEN_READ && midi_input_intr)
-	midi_input_intr (my_dev, c);
-    }
-}
-
-void
-sb16midiintr (int unit)
-{
-  if (sb16midi_base == 0)
-    return;
-
-  if (input_avail ())
-    sb16midi_input_loop ();
-}
-
-void
-sbmidiintr (int irq, void *dev_id, struct pt_regs *dummy)
-{
-  if (input_avail ())
-    sb16midi_input_loop ();
-}
-
-static int
-sb16midi_open (int dev, int mode,
-	       void            (*input) (int dev, unsigned char data),
-	       void            (*output) (int dev)
-)
-{
-  if (sb16midi_opened)
-    {
-      return -EBUSY;
-    }
-
-  while (input_avail ())
-    sb16midi_read ();
-
-  midi_input_intr = input;
-  sb16midi_opened = mode;
-
-  return 0;
-}
-
-static void
-sb16midi_close (int dev)
-{
-  sb16midi_opened = 0;
-}
-
-static int
-sb16midi_out (int dev, unsigned char midi_byte)
-{
-  int             timeout;
-  unsigned long   flags;
-
-  /*
-   * Test for input since pending input seems to block the output.
-   */
-
-  save_flags (flags);
-  cli ();
-
-  if (input_avail ())
-    sb16midi_input_loop ();
-
-  restore_flags (flags);
-
-  /*
-   * Sometimes it takes about 13000 loops before the output becomes ready
-   * (After reset). Normally it takes just about 10 loops.
-   */
-
-  for (timeout = 30000; timeout > 0 && !output_ready (); timeout--);	/*
-									 * Wait
-									 */
-
-  if (!output_ready ())
-    {
-      printk ("MPU-401: Timeout\n");
-      return 0;
-    }
-
-  sb16midi_write (midi_byte);
-  return 1;
-}
-
-static int
-sb16midi_start_read (int dev)
-{
-  return 0;
-}
-
-static int
-sb16midi_end_read (int dev)
-{
-  return 0;
-}
-
-static int
-sb16midi_ioctl (int dev, unsigned cmd, caddr_t arg)
-{
-  return -EINVAL;
-}
-
-static void
-sb16midi_kick (int dev)
-{
-}
-
-static int
-sb16midi_buffer_status (int dev)
-{
-  return 0;			/*
-				 * No data in buffers
-				 */
-}
-
-#define MIDI_SYNTH_NAME	"SoundBlaster MPU"
-#define MIDI_SYNTH_CAPS	SYNTH_CAP_INPUT
-#include "midi_synth.h"
-
-static struct midi_operations sb16midi_operations =
-{
-  {"SoundBlaster MPU", 0, 0, SNDCARD_SB16MIDI},
-  &std_midi_synth,
-  {0},
-  sb16midi_open,
-  sb16midi_close,
-  sb16midi_ioctl,
-  sb16midi_out,
-  sb16midi_start_read,
-  sb16midi_end_read,
-  sb16midi_kick,
-  NULL,
-  sb16midi_buffer_status,
-  NULL
-};
-
-static void
-enter_uart_mode (void)
-{
-  int             ok, timeout;
-  unsigned long   flags;
-
-  save_flags (flags);
-  cli ();
-  for (timeout = 30000; timeout < 0 && !output_ready (); timeout--);
-
-  input_byte = 0;
-  sb16midi_cmd (UART_MODE_ON);
-
-  ok = 0;
-  for (timeout = 50000; timeout > 0 && !ok; timeout--)
-    if (input_byte == MPU_ACK)
-      ok = 1;
-    else if (input_avail ())
-      if (sb16midi_read () == MPU_ACK)
-	ok = 1;
-
-  restore_flags (flags);
-}
-
-long
-attach_sb16midi (long mem_start, struct address_info *hw_config)
-{
-  sb16midi_base = hw_config->io_base;
-
-  if (!sb16midi_detected)
-    return mem_start;
-
-  request_region (hw_config->io_base, 4, "SB MIDI");
-  enter_uart_mode ();
-
-  if (num_midis >= MAX_MIDI_DEV)
-    {
-      printk ("Sound: Too many midi devices detected\n");
-      return mem_start;
-    }
-
-  conf_printf ("SoundBlaster MPU-401", hw_config);
-
-  std_midi_synth.midi_dev = my_dev = num_midis;
-  midi_devs[num_midis++] = &sb16midi_operations;
-  return mem_start;
-}
-
-static int
-reset_sb16midi (void)
-{
-  int             ok, timeout, n;
-
-  /*
-   * Send the RESET command. Try again if no success at the first time.
-   */
-
-  ok = 0;
-
-  /*save_flags(flags);cli(); */
-
-  for (n = 0; n < 2 && !ok; n++)
-    {
-      for (timeout = 30000; timeout < 0 && !output_ready (); timeout--);	/*
-										 * Wait
-										 */
-      input_byte = 0;
-      sb16midi_cmd (MPU_RESET);	/*
-				 * Send MPU-401 RESET Command
-				 */
-
-      /*
-       * Wait at least 25 msec. This method is not accurate so let's make the
-       * loop bit longer. Cannot sleep since this is called during boot.
-       */
-
-      for (timeout = 50000; timeout > 0 && !ok; timeout--)
-	if (input_byte == MPU_ACK)	/* Interrupt */
-	  ok = 1;
-	else if (input_avail ())
-	  if (sb16midi_read () == MPU_ACK)
-	    ok = 1;
-
-    }
-
-  sb16midi_opened = 0;
-  if (ok)
-    sb16midi_input_loop ();	/*
-				 * Flush input before enabling interrupts
-				 */
-
-  /* restore_flags(flags); */
-
-  return ok;
-}
-
-int
-probe_sb16midi (struct address_info *hw_config)
-{
-  int             ok = 0;
-  extern int      sbc_major;
-
-  extern void     ess_midi_init (struct address_info *hw_config);
-  extern void     Jazz16_midi_init (struct address_info *hw_config);
-
-  if (check_region (hw_config->io_base, 4))
-    return 0;
-
-  if (AudioDrive)
-    ess_midi_init (hw_config);
-  else if (Jazz16_detected)
-    Jazz16_midi_init (hw_config);
-  else if (sbc_major < 4)
-    return 0;			/* Not a SB16 */
-
-  sb16midi_base = hw_config->io_base;
-
-  if (sb_get_irq () < 0)
-    return 0;
-
-  ok = reset_sb16midi ();
-
-  sb16midi_detected = ok;
-  return ok;
-}
-
-void
-unload_sb16midi (struct address_info *hw_config)
-{
-  release_region (hw_config->io_base, 4);
-}
-
-#endif