patch-2.1.63 linux/drivers/sound/opl3sa.c

• Lines: 288
• Date: Tue Sep 30 08:46:53 1997
• Orig file: v2.1.62/linux/drivers/sound/opl3sa.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.62/linux/drivers/sound/opl3sa.c linux/drivers/sound/opl3sa.c
@@ -0,0 +1,287 @@
+/*
+ * sound/Xopl3sa.c
+ *
+ * Low level driver for Yamaha YMF701B aka OPL3-SA chip
+ * 
+ */
+/*
+ * 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.
+ */
+#include <linux/config.h>
+
+#undef  SB_OK
+
+#include "sound_config.h"
+#ifdef SB_OK
+#include "sb.h"
+static int      sb_initialized = 0;
+
+#endif
+
+#ifdef CONFIG_OPL3SA1
+
+static int      kilroy_was_here = 0;	/* Don't detect twice */
+static int      mpu_initialized = 0;
+
+static int     *opl3sa_osp = NULL;
+
+static unsigned char
+opl3sa_read (int addr)
+{
+  unsigned long   flags;
+  unsigned char   tmp;
+
+  save_flags (flags);
+  cli ();
+  outb ((0x1d), 0xf86);		/* password */
+  outb (((unsigned char) addr), 0xf86);		/* address */
+  tmp = inb (0xf87);		/* data */
+  restore_flags (flags);
+
+  return tmp;
+}
+
+static void
+opl3sa_write (int addr, int data)
+{
+  unsigned long   flags;
+
+  save_flags (flags);
+  cli ();
+  outb ((0x1d), 0xf86);		/* password */
+  outb (((unsigned char) addr), 0xf86);		/* address */
+  outb (((unsigned char) data), 0xf87);		/* data */
+  restore_flags (flags);
+}
+
+static int
+opl3sa_detect (void)
+{
+  int             tmp;
+
+  if (((tmp = opl3sa_read (0x01)) & 0xc4) != 0x04)
+    {
+      DDB (printk ("OPL3-SA detect error 1 (%x)\n", opl3sa_read (0x01)));
+      /* return 0; */
+    }
+
+/*
+ * Check that the password feature has any effect
+ */
+  if (inb (0xf87) == tmp)
+    {
+      DDB (printk ("OPL3-SA detect failed 2 (%x/%x)\n", tmp, inb (0xf87)));
+      return 0;
+    }
+
+  tmp = (opl3sa_read (0x04) & 0xe0) >> 5;
+
+  if (tmp != 0 && tmp != 1)
+    {
+      DDB (printk ("OPL3-SA detect failed 3 (%d)\n", tmp));
+      return 0;
+    }
+
+  DDB (printk ("OPL3-SA mode %x detected\n", tmp));
+
+  opl3sa_write (0x01, 0x00);	/* Disable MSS */
+  opl3sa_write (0x02, 0x00);	/* Disable SB */
+  opl3sa_write (0x03, 0x00);	/* Disable MPU */
+
+  return 1;
+}
+
+/*
+ *    Probe and attach routines for the Windows Sound System mode of
+ *     OPL3-SA
+ */
+
+int
+probe_opl3sa_wss (struct address_info *hw_config)
+{
+  int             ret;
+  unsigned char   tmp = 0x24;	/* WSS enable */
+
+  if (check_region (0xf86, 2))	/* Control port is busy */
+    return 0;
+  /*
+     * Check if the IO port returns valid signature. The original MS Sound
+     * system returns 0x04 while some cards (OPL3-SA for example)
+     * return 0x00.
+   */
+  if (check_region (hw_config->io_base, 8))
+    {
+      printk ("OPL3-SA: MSS I/O port conflict (%x)\n", hw_config->io_base);
+      return 0;
+    }
+
+  opl3sa_osp = hw_config->osp;
+
+  if (!opl3sa_detect ())
+    {
+      printk ("OSS: OPL3-SA chip not found\n");
+      return 0;
+    }
+
+  switch (hw_config->io_base)
+    {
+    case 0x530:
+      tmp |= 0x00;
+      break;
+    case 0xe80:
+      tmp |= 0x08;
+      break;
+    case 0xf40:
+      tmp |= 0x10;
+      break;
+    case 0x604:
+      tmp |= 0x18;
+      break;
+    default:
+      printk ("OSS: Unsupported OPL3-SA/WSS base %x\n", hw_config->io_base);
+      return 0;
+    }
+
+  opl3sa_write (0x01, tmp);	/* WSS setup register */
+  kilroy_was_here = 1;
+
+  ret = probe_ms_sound (hw_config);
+  if (ret)
+    request_region (0xf86, 2, "OPL3-SA");
+
+  return ret;
+}
+
+void
+attach_opl3sa_wss (struct address_info *hw_config)
+{
+  int             nm = num_mixers;
+
+  attach_ms_sound (hw_config);
+  if (num_mixers > nm)		/* A mixer was installed */
+    {
+      AD1848_REROUTE (SOUND_MIXER_LINE1, SOUND_MIXER_CD);
+      AD1848_REROUTE (SOUND_MIXER_LINE2, SOUND_MIXER_SYNTH);
+      AD1848_REROUTE (SOUND_MIXER_LINE3, SOUND_MIXER_LINE);
+    }
+}
+
+
+void
+attach_opl3sa_mpu (struct address_info *hw_config)
+{
+#if defined(CONFIG_UART401) && defined(CONFIG_MIDI)
+  hw_config->name = "OPL3-SA (MPU401)";
+  attach_uart401 (hw_config);
+#endif
+}
+
+int
+probe_opl3sa_mpu (struct address_info *hw_config)
+{
+#if defined(CONFIG_UART401) && defined(CONFIG_MIDI)
+  unsigned char   conf;
+  static char     irq_bits[] =
+  {-1, -1, -1, -1, -1, 1, -1, 2, -1, 3, 4};
+
+  if (!kilroy_was_here)
+    {
+      return 0;			/* OPL3-SA has not been detected earlier */
+    }
+
+  if (mpu_initialized)
+    {
+      DDB (printk ("OPL3-SA: MPU mode already initialized\n"));
+      return 0;
+    }
+
+  if (check_region (hw_config->io_base, 4))
+    {
+      printk ("OPL3-SA: MPU I/O port conflict (%x)\n", hw_config->io_base);
+      return 0;
+    }
+
+  if (hw_config->irq > 10)
+    {
+      printk ("OPL3-SA: Bad MPU IRQ %d\n", hw_config->irq);
+      return 0;
+    }
+
+  if (irq_bits[hw_config->irq] == -1)
+    {
+      printk ("OPL3-SA: Bad MPU IRQ %d\n", hw_config->irq);
+      return 0;
+    }
+
+  switch (hw_config->io_base)
+    {
+    case 0x330:
+      conf = 0x00;
+      break;
+    case 0x332:
+      conf = 0x20;
+      break;
+    case 0x334:
+      conf = 0x40;
+      break;
+    case 0x300:
+      conf = 0x60;
+      break;
+    default:
+      return 0;			/* Invalid port */
+    }
+
+  conf |= 0x83;			/* MPU & OPL3 (synth) & game port enable */
+  conf |= irq_bits[hw_config->irq] << 2;
+
+  opl3sa_write (0x03, conf);
+
+  mpu_initialized = 1;
+
+  return probe_uart401 (hw_config);
+#else
+  return 0;
+#endif
+}
+
+void
+unload_opl3sa_wss (struct address_info *hw_config)
+{
+  int             dma2 = hw_config->dma2;
+
+  if (dma2 == -1)
+    dma2 = hw_config->dma;
+
+  release_region (0xf86, 2);
+  release_region (hw_config->io_base, 4);
+
+  ad1848_unload (hw_config->io_base + 4,
+		 hw_config->irq,
+		 hw_config->dma,
+		 dma2,
+		 0);
+}
+
+void
+unload_opl3sa_mpu (struct address_info *hw_config)
+{
+#if defined(CONFIG_UART401) && defined(CONFIG_MIDI)
+  unload_uart401 (hw_config);
+#endif
+}
+#ifdef SB_OK
+void
+unload_opl3sa_sb (struct address_info *hw_config)
+{
+#ifdef CONFIG_SBDSP
+  sb_dsp_unload (hw_config);
+#endif
+}
+#endif
+
+
+#endif