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To: multimedia@freebsd.org
Subject: PAS16 diffs for guspnp19.tar.gz 
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Date: Wed, 01 Oct 1997 20:44:07 +1000
From: Stephen Hocking <shocking@mailbox.uq.edu.au>
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	This patch adds the TRIGGER capability to the PAS16 code, allowing one 
to play quake!! I'll be following it up in a few days with a patch that allows 
the sb clone on the PAS16 card to also be detected, allowing for a crude form 
of full duplex sound.


	Stephen

*** pas2_pcm.c.old	Tue Sep 23 12:09:46 1997
--- pas2_pcm.c	Wed Oct  1 20:40:37 1997
***************
*** 53,58 ****
--- 53,59 ----
  static u_long pcm_count = 0;
  static u_short pcm_bitsok = 8;	/* mask of OK bits */
  static int      my_devnum = 0;
+ static int	open_mode = 0;
  
  int
  pcm_set_speed(int arg)
***************
*** 228,233 ****
--- 229,235 ----
  
  
  	pcm_count = 0;
+ 	open_mode = mode;
  
  	return 0;
  }
***************
*** 245,250 ****
--- 247,254 ----
  	pas_remove_intr(PAS_PCM_INTRBITS);
  	pcm_mode = PCM_NON;
  
+ 	open_mode = 0;
+ 
  	splx(flags);
  }
  
***************
*** 286,292 ****
--- 290,298 ----
  		pcm_count = count;
  	}
  	pas_write(pas_read(FILTER_FREQUENCY) | F_F_PCM_BUFFER_COUNTER | F_F_PCM_RATE_COUNTER, FILTER_FREQUENCY);
+ #ifdef NO_TRIGGER
  	pas_write(pas_read(PCM_CONTROL) | P_C_PCM_ENABLE | P_C_PCM_DAC_MODE, PCM_CONTROL);
+ #endif
  
  	pcm_mode = PCM_DAC;
  
***************
*** 329,340 ****
--- 335,368 ----
  		pcm_count = count;
  	}
  	pas_write(pas_read(FILTER_FREQUENCY) | F_F_PCM_BUFFER_COUNTER | F_F_PCM_RATE_COUNTER, FILTER_FREQUENCY);
+ #ifdef NO_TRIGGER
  	pas_write((pas_read(PCM_CONTROL) | P_C_PCM_ENABLE) & ~P_C_PCM_DAC_MODE, PCM_CONTROL);
+ #endif
  
  	pcm_mode = PCM_ADC;
  
  	splx(flags);
  }
+ #ifndef NO_TRIGGER
+ static void
+ pas_audio_trigger (int dev, int state)
+ {
+   unsigned long   flags;
+ 
+   flags = splhigh();
+ 
+   state &= open_mode;
+ 
+   if (state & PCM_ENABLE_OUTPUT)
+     pas_write (pas_read (0xF8A) | 0x40 | 0x10, 0xF8A);
+   else if (state & PCM_ENABLE_INPUT)
+     pas_write ((pas_read (0xF8A) | 0x40) & ~0x10, 0xF8A);
+   else
+     pas_write (pas_read (0xF8A) & ~0x40, 0xF8A);
+ 
+   splx(flags);
+ }
+ #endif
  
  static int
  pas_pcm_prepare_for_input(int dev, int bsize, int bcount)
***************
*** 363,369 ****
  	pas_pcm_reset,
  	pas_pcm_reset,
  	NULL,
! 	NULL
  };
  
  void
--- 391,400 ----
  	pas_pcm_reset,
  	pas_pcm_reset,
  	NULL,
! 	NULL,
! 	NULL,
! 	NULL,
! 	pas_audio_trigger
  };
  
  void