patch-2.0.1 linux/drivers/sound/mad16_sb_midi.c

• Lines: 358
• Date: Thu Jan 1 02:00:00 1970
• Orig file: v2.0.0/linux/drivers/sound/mad16_sb_midi.c
• Orig date: Fri Apr 12 15:52:03 1996

diff -u --recursive --new-file v2.0.0/linux/drivers/sound/mad16_sb_midi.c linux/drivers/sound/mad16_sb_midi.c
@@ -1,357 +0,0 @@
-/*
- * sound/mad16_sb_midi.c
- *
- * The low level driver for MAD16 SoundBlaster-DS-chip-based MIDI.
- */
-/*
- * 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>
-
-/*
- * Modifications by Aaron Ucko 1995
- */
-
-#include "sound_config.h"
-
-#if defined(CONFIG_MAD16) && defined(CONFIG_MIDI)
-
-#define sbc_base mad16_sb_base
-#include "sb.h"
-
-static int      input_opened = 0;
-static int      my_dev;
-static int      mad16_sb_base = 0x220;
-static int      mad16_sb_irq = 0;
-static int      mad16_sb_dsp_ok = 0;
-static int      mad16_sb_dsp_attached = 0;
-static int     *midi_osp;
-
-int             mad16_sb_midi_mode = NORMAL_MIDI;
-int             mad16_sb_midi_busy = 0;
-
-int             mad16_sb_duplex_midi = 0;
-volatile int    mad16_sb_intr_active = 0;
-
-void            (*midi_input_intr) (int dev, unsigned char data);
-
-static void     mad16_sb_midi_init (int model);
-
-static int
-mad16_sb_dsp_command (unsigned char val)
-{
-  int             i;
-  unsigned long   limit;
-
-  limit = jiffies + HZ / 10;	/*
-				   * The timeout is 0.1 seconds
-				 */
-
-  /*
-   * Note! the i<500000 is an emergency exit. The mad16_sb_dsp_command() is sometimes
-   * called while interrupts are disabled. This means that the timer is
-   * disabled also. However the timeout situation is a abnormal condition.
-   * Normally the DSP should be ready to accept commands after just couple of
-   * loops.
-   */
-
-  for (i = 0; i < 500000 && jiffies < limit; i++)
-    {
-      if ((inb (DSP_STATUS) & 0x80) == 0)
-	{
-	  outb (val, DSP_COMMAND);
-	  return 1;
-	}
-    }
-
-  printk ("MAD16 (SBP mode): DSP Command(%x) Timeout.\n", val);
-  printk ("IRQ conflict???\n");
-  return 0;
-}
-
-void
-mad16_sbintr (int irq, void *dev_id, struct pt_regs *dummy)
-{
-  int             status;
-
-  unsigned long   flags;
-  unsigned char   data;
-
-  status = inb (DSP_DATA_AVAIL);	/*
-					   * Clear interrupt
-					 */
-
-  save_flags (flags);
-  cli ();
-
-  data = inb (DSP_READ);
-  if (input_opened)
-    midi_input_intr (my_dev, data);
-
-  restore_flags (flags);
-}
-
-static int
-mad16_sb_reset_dsp (void)
-{
-  int             loopc;
-
-  outb (1, DSP_RESET);
-  tenmicrosec (midi_osp);
-  outb (0, DSP_RESET);
-  tenmicrosec (midi_osp);
-  tenmicrosec (midi_osp);
-  tenmicrosec (midi_osp);
-
-  for (loopc = 0; loopc < 1000 && !(inb (DSP_DATA_AVAIL) & 0x80); loopc++);	/*
-										   * Wait
-										   * for
-										   * data
-										   * *
-										   * available
-										   * status
-										 */
-
-  if (inb (DSP_READ) != 0xAA)
-    return 0;			/*
-				 * Sorry
-				 */
-
-  return 1;
-}
-
-int
-mad16_sb_dsp_detect (struct address_info *hw_config)
-{
-  mad16_sb_base = hw_config->io_base;
-  mad16_sb_irq = hw_config->irq;
-  midi_osp = hw_config->osp;
-
-  if (check_region (hw_config->io_base, 16))
-    {
-      printk ("MAD16 SB MIDI: I/O base %x not free\n", hw_config->io_base);
-      return 0;
-    }
-
-  if (mad16_sb_dsp_ok)
-    return 0;			/*
-				 * Already initialized
-				 */
-  if (!mad16_sb_reset_dsp ())
-    return 0;
-
-  return 1;			/*
-				 * Detected
-				 */
-}
-
-long
-mad16_sb_dsp_init (long mem_start, struct address_info *hw_config)
-/* this function now just verifies the reported version and calls
- * mad16_sb_midi_init -- everything else is done elsewhere */
-{
-
-  mad16_sb_dsp_attached = 1;
-  midi_osp = hw_config->osp;
-  if (snd_set_irq_handler (mad16_sb_irq, mad16_sbintr, "MAD16 SB MIDI", midi_osp) < 0)
-    {
-      printk ("MAD16 SB MIDI: IRQ not free\n");
-      return mem_start;
-    }
-
-  request_region (hw_config->io_base, 16, "mad16/Mozart MIDI");
-
-  conf_printf ("MAD16 MIDI (SB mode)", hw_config);
-  mad16_sb_midi_init (2);
-
-  mad16_sb_dsp_ok = 1;
-  return mem_start;
-}
-
-void
-mad16_sb_dsp_unload (struct address_info *hw_config)
-{
-  if (!mad16_sb_dsp_attached)
-    return;
-
-  release_region (hw_config->io_base, 16);
-  snd_release_irq (hw_config->irq);
-}
-
-static int
-mad16_sb_midi_open (int dev, int mode,
-		    void            (*input) (int dev, unsigned char data),
-		    void            (*output) (int dev)
-)
-{
-
-  if (!mad16_sb_dsp_ok)
-    {
-      printk ("MAD16_SB Error: MIDI hardware not installed\n");
-      return -ENXIO;
-    }
-
-  if (mad16_sb_midi_busy)
-    return -EBUSY;
-
-  if (mode != OPEN_WRITE && !mad16_sb_duplex_midi)
-    {
-      if (num_midis == 1)
-	printk ("MAD16 (SBP mode): Midi input not currently supported\n");
-      return -EPERM;
-    }
-
-  mad16_sb_midi_mode = NORMAL_MIDI;
-  if (mode != OPEN_WRITE)
-    {
-      if (mad16_sb_intr_active)
-	return -EBUSY;
-      mad16_sb_midi_mode = UART_MIDI;
-    }
-
-  if (mad16_sb_midi_mode == UART_MIDI)
-    {
-      mad16_sb_reset_dsp ();
-
-      if (!mad16_sb_dsp_command (0x35))
-	return -EIO;		/*
-				   * Enter the UART mode
-				 */
-      mad16_sb_intr_active = 1;
-
-      input_opened = 1;
-      midi_input_intr = input;
-    }
-
-  mad16_sb_midi_busy = 1;
-
-  return 0;
-}
-
-static void
-mad16_sb_midi_close (int dev)
-{
-  if (mad16_sb_midi_mode == UART_MIDI)
-    {
-      mad16_sb_reset_dsp ();	/*
-				   * The only way to kill the UART mode
-				 */
-    }
-  mad16_sb_intr_active = 0;
-  mad16_sb_midi_busy = 0;
-  input_opened = 0;
-}
-
-static int
-mad16_sb_midi_out (int dev, unsigned char midi_byte)
-{
-  unsigned long   flags;
-
-  if (mad16_sb_midi_mode == NORMAL_MIDI)
-    {
-      save_flags (flags);
-      cli ();
-      if (mad16_sb_dsp_command (0x38))
-	mad16_sb_dsp_command (midi_byte);
-      else
-	printk ("MAD16_SB Error: Unable to send a MIDI byte\n");
-      restore_flags (flags);
-    }
-  else
-    mad16_sb_dsp_command (midi_byte);	/*
-					   * UART write
-					 */
-
-  return 1;
-}
-
-static int
-mad16_sb_midi_start_read (int dev)
-{
-  if (mad16_sb_midi_mode != UART_MIDI)
-    {
-      printk ("MAD16 (SBP mode): MIDI input not implemented.\n");
-      return -EPERM;
-    }
-  return 0;
-}
-
-static int
-mad16_sb_midi_end_read (int dev)
-{
-  if (mad16_sb_midi_mode == UART_MIDI)
-    {
-      mad16_sb_reset_dsp ();
-      mad16_sb_intr_active = 0;
-    }
-  return 0;
-}
-
-static int
-mad16_sb_midi_ioctl (int dev, unsigned cmd, caddr_t arg)
-{
-  return -EPERM;
-}
-
-#define MIDI_SYNTH_NAME	"pseudo-SoundBlaster Midi"
-#define MIDI_SYNTH_CAPS	0
-#include "midi_synth.h"
-
-static struct midi_operations mad16_sb_midi_operations =
-{
-  {"MAD16 (SBP mode)", 0, 0, SNDCARD_MAD16},
-  &std_midi_synth,
-  {0},
-  mad16_sb_midi_open,
-  mad16_sb_midi_close,
-  mad16_sb_midi_ioctl,
-  mad16_sb_midi_out,
-  mad16_sb_midi_start_read,
-  mad16_sb_midi_end_read,
-  NULL,				/*
-				 * Kick
-				 */
-  NULL,				/*
-				 * command
-				 */
-  NULL,				/*
-				 * buffer_status
-				 */
-  NULL
-};
-
-static void
-mad16_sb_midi_init (int model)
-{
-  if (num_midis >= MAX_MIDI_DEV)
-    {
-      printk ("Sound: Too many midi devices detected\n");
-      return;
-    }
-
-  std_midi_synth.midi_dev = num_midis;
-  my_dev = num_midis;
-  midi_devs[num_midis++] = &mad16_sb_midi_operations;
-}
-
-#endif