FreeBSD/Linux Kernel Cross Reference
sys/dev/video/bktr/bktr_audio.c

     /*-
      * 1. Redistributions of source code must retain the
      * Copyright (c) 1997 Amancio Hasty, 1999 Roger Hardiman
      * All rights reserved.
      *
      * 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.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by Amancio Hasty and
     *      Roger Hardiman
     * 4. The name of the author may not be used to endorse or promote products
     *    derived from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
     *
     * $FreeBSD: src/sys/dev/bktr/bktr_audio.c,v 1.16 2005/05/29 04:42:18 nyan Exp $
     * $DragonFly: src/sys/dev/video/bktr/bktr_audio.c,v 1.10 2007/10/03 19:27:08 swildner Exp $
     */
    
    /*
     * This is part of the Driver for Video Capture Cards (Frame grabbers)
     * and TV Tuner cards using the Brooktree Bt848, Bt848A, Bt849A, Bt878, Bt879
     * chipset.
     * Copyright Roger Hardiman and Amancio Hasty.
     *
     * bktr_audio : This deals with controlling the audio on TV cards,
     *                controlling the Audio Multiplexer (audio source selector).
     *                controlling any MSP34xx stereo audio decoders.
     *                controlling any DPL35xx dolby surroud sound audio decoders.
     *                initialising TDA98xx audio devices.
     *
     */
    
    #include "opt_bktr.h"               /* Include any kernel config options */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/bus.h>
    #include <sys/event.h>
    
    #include <bus/pci/pcivar.h>
    
    #include <dev/video/meteor/ioctl_meteor.h>
    #include <dev/video/bktr/ioctl_bt848.h> /* extensions to ioctl_meteor.h */
    #include <dev/video/bktr/bktr_reg.h>
    #include <dev/video/bktr/bktr_core.h>
    #include <dev/video/bktr/bktr_tuner.h>
    #include <dev/video/bktr/bktr_card.h>
    #include <dev/video/bktr/bktr_audio.h>
    
    /*
     * Prototypes for the GV_BCTV2 specific functions.
     */
    void    set_bctv2_audio( bktr_ptr_t bktr );
    void    bctv2_gpio_write( bktr_ptr_t bktr, int port, int val );
    /*int   bctv2_gpio_read( bktr_ptr_t bktr, int port );*/ /* Not used */
    
    /*
     * init_audio_devices
     * Reset any MSP34xx or TDA98xx audio devices.
     */
    void init_audio_devices( bktr_ptr_t bktr ) {
    
            /* enable stereo if appropriate on TDA audio chip */
            if ( bktr->card.dbx )
                    init_BTSC( bktr );
     
            /* reset the MSP34xx stereo audio chip */
            if ( bktr->card.msp3400c )
                    msp_dpl_reset( bktr, bktr->msp_addr );
    
            /* reset the DPL35xx dolby audio chip */
            if ( bktr->card.dpl3518a )
                    msp_dpl_reset( bktr, bktr->dpl_addr );
    
    }
    
    
    /*
     * 
     */
   #define AUDIOMUX_DISCOVER_NOT
   int
   set_audio( bktr_ptr_t bktr, int cmd )
   {
           u_long          temp;
           volatile u_char idx;
   
   #if defined( AUDIOMUX_DISCOVER )
           if ( cmd >= 200 )
                   cmd -= 200;
           else
   #endif /* AUDIOMUX_DISCOVER */
   
           /* check for existance of audio MUXes */
           if ( !bktr->card.audiomuxs[ 4 ] )
                   return( -1 );
   
           switch (cmd) {
           case AUDIO_TUNER:
   #ifdef BKTR_REVERSEMUTE
                   bktr->audio_mux_select = 3;
   #else
                   bktr->audio_mux_select = 0;
   #endif
   
                   if (bktr->reverse_mute ) 
                         bktr->audio_mux_select = 0;
                   else    
                       bktr->audio_mux_select = 3;
   
                   break;
           case AUDIO_EXTERN:
                   bktr->audio_mux_select = 1;
                   break;
           case AUDIO_INTERN:
                   bktr->audio_mux_select = 2;
                   break;
           case AUDIO_MUTE:
                   bktr->audio_mute_state = TRUE;  /* set mute */
                   break;
           case AUDIO_UNMUTE:
                   bktr->audio_mute_state = FALSE; /* clear mute */
                   break;
           default:
                   kprintf("%s: audio cmd error %02x\n", bktr_name(bktr),
                          cmd);
                   return( -1 );
           }
   
   
           /* Most cards have a simple audio multiplexer to select the
            * audio source. The I/O_GV card has a more advanced multiplexer
            * and requires special handling.
            */
           if ( bktr->bt848_card == CARD_IO_BCTV2 ) {
                   set_bctv2_audio( bktr );
                   return( 0 );
           }
   
           /* Proceed with the simpler audio multiplexer code for the majority
            * of Bt848 cards.
            */
   
           /*
            * Leave the upper bits of the GPIO port alone in case they control
            * something like the dbx or teletext chips.  This doesn't guarantee
            * success, but follows the rule of least astonishment.
            */
   
           if ( bktr->audio_mute_state == TRUE ) {
   #ifdef BKTR_REVERSEMUTE
                   idx = 0;
   #else
                   idx = 3;
   #endif
   
                   if (bktr->reverse_mute )
                     idx  = 3;
                   else    
                     idx  = 0;
   
           }
           else
                   idx = bktr->audio_mux_select;
   
   
           temp = INL(bktr, BKTR_GPIO_DATA) & ~bktr->card.gpio_mux_bits;
   #if defined( AUDIOMUX_DISCOVER )
           OUTL(bktr, BKTR_GPIO_DATA, temp | (cmd & 0xff));
           kprintf("%s: cmd: %d audio mux %x temp %x \n", bktr_name(bktr),
                   cmd, bktr->card.audiomuxs[ idx ], temp );
   #else
           OUTL(bktr, BKTR_GPIO_DATA, temp | bktr->card.audiomuxs[ idx ]);
   #endif /* AUDIOMUX_DISCOVER */
   
   
   
           /* Some new Hauppauge cards do not have an audio mux */
           /* Instead we use the MSP34xx chip to select TV audio, Line-In */
           /* FM Radio and Mute */
           /* Examples of this are the Hauppauge 44xxx MSP34xx models */
           /* It is ok to drive both the mux and the MSP34xx chip. */
           /* If there is no mux, the MSP does the switching of the audio source */
           /* If there is a mux, it does the switching of the audio source */
   
           if ((bktr->card.msp3400c) && (bktr->audio_mux_present == 0)) {
   
             if (bktr->audio_mute_state == TRUE ) {
                    msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000, 0x0000); /* volume to MUTE */
             } else {
                    if(bktr->audio_mux_select == 0) { /* TV Tuner */
                       msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000, 0x7300); /* 0 db volume */
                       if (bktr->msp_source_selected != 0) msp_autodetect(bktr);  /* setup TV audio mode */
                       bktr->msp_source_selected = 0;
                    }
                    if(bktr->audio_mux_select == 1) { /* Line In */
                       msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000, 0x7300); /* 0 db volume */
                       msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000d, 0x1900); /* scart prescale */
                       msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008, 0x0220); /* SCART | STEREO */
                       msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0013, 0x0000); /* DSP In = SC1_IN_L/R */
                       bktr->msp_source_selected = 1;
                    }
   
                    if(bktr->audio_mux_select == 2) { /* FM Radio */
                       msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000, 0x7300); /* 0 db volume */
                       msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000d, 0x1900); /* scart prescale */
                       msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008, 0x0220); /* SCART | STEREO */
                       msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0013, 0x0200); /* DSP In = SC2_IN_L/R */
                       bktr->msp_source_selected = 2;
                    }
             }
           }
   
   
           return( 0 );
   }
   
   
   /*
    * 
    */
   void
   temp_mute( bktr_ptr_t bktr, int flag )
   {
           static int      muteState = FALSE;
   
           if ( flag == TRUE ) {
                   muteState = bktr->audio_mute_state;
                   set_audio( bktr, AUDIO_MUTE );          /* prevent 'click' */
           }
           else {
                   tsleep( BKTR_SLEEP, 0, "tuning", hz/8 );
                   if ( muteState == FALSE )
                           set_audio( bktr, AUDIO_UNMUTE );
           }
   }
   
   /* address of BTSC/SAP decoder chip */
   #define TDA9850_WADDR           0xb6
   #define TDA9850_RADDR           0xb7
   
   
   /* registers in the TDA9850 BTSC/dbx chip */
   #define CON1ADDR                0x04
   #define CON2ADDR                0x05
   #define CON3ADDR                0x06 
   #define CON4ADDR                0x07
   #define ALI1ADDR                0x08 
   #define ALI2ADDR                0x09
   #define ALI3ADDR                0x0a
   
   /*
    * initialise the dbx chip
    * taken from the Linux bttv driver TDA9850 initialisation code
    */
   void 
   init_BTSC( bktr_ptr_t bktr )
   {
       i2cWrite(bktr, TDA9850_WADDR, CON1ADDR, 0x08); /* noise threshold st */
       i2cWrite(bktr, TDA9850_WADDR, CON2ADDR, 0x08); /* noise threshold sap */
       i2cWrite(bktr, TDA9850_WADDR, CON3ADDR, 0x40); /* stereo mode */
       i2cWrite(bktr, TDA9850_WADDR, CON4ADDR, 0x07); /* 0 dB input gain? */
       i2cWrite(bktr, TDA9850_WADDR, ALI1ADDR, 0x10); /* wideband alignment? */
       i2cWrite(bktr, TDA9850_WADDR, ALI2ADDR, 0x10); /* spectral alignment? */
       i2cWrite(bktr, TDA9850_WADDR, ALI3ADDR, 0x03);
   }
   
   /*
    * setup the dbx chip
    * XXX FIXME: alot of work to be done here, this merely unmutes it.
    */
   int
   set_BTSC( bktr_ptr_t bktr, int control )
   {
           return( i2cWrite( bktr, TDA9850_WADDR, CON3ADDR, control ) );
   }
   
   /*
    * CARD_GV_BCTV2 specific functions.
    */
   
   #define BCTV2_AUDIO_MAIN              0x10    /* main audio program */
   #define BCTV2_AUDIO_SUB               0x20    /* sub audio program */
   #define BCTV2_AUDIO_BOTH              0x30    /* main(L) + sub(R) program */
   
   #define BCTV2_GPIO_REG0          1
   #define BCTV2_GPIO_REG1          3
   
   #define BCTV2_GR0_AUDIO_MODE     3
   #define BCTV2_GR0_AUDIO_MAIN     0       /* main program */
   #define BCTV2_GR0_AUDIO_SUB      3       /* sub program */
   #define BCTV2_GR0_AUDIO_BOTH     1       /* main(L) + sub(R) */
   #define BCTV2_GR0_AUDIO_MUTE     4       /* audio mute */
   #define BCTV2_GR0_AUDIO_MONO     8       /* force mono */
   
   void
   set_bctv2_audio( bktr_ptr_t bktr )
   {
           int data;
   
           switch (bktr->audio_mux_select) {
           case 1:         /* external */
           case 2:         /* internal */
                   bctv2_gpio_write(bktr, BCTV2_GPIO_REG1, 0);
                   break;
           default:        /* tuner */
                   bctv2_gpio_write(bktr, BCTV2_GPIO_REG1, 1);
                   break;
           }
   /*      switch (bktr->audio_sap_select) { */
           switch (BCTV2_AUDIO_BOTH) {
           case BCTV2_AUDIO_SUB:
                   data = BCTV2_GR0_AUDIO_SUB;
                   break;
           case BCTV2_AUDIO_BOTH:
                   data = BCTV2_GR0_AUDIO_BOTH;
                   break;
           case BCTV2_AUDIO_MAIN:
           default:
                   data = BCTV2_GR0_AUDIO_MAIN;
                   break;
           }
           if (bktr->audio_mute_state == TRUE)
                   data |= BCTV2_GR0_AUDIO_MUTE;
   
           bctv2_gpio_write(bktr, BCTV2_GPIO_REG0, data);
   
           return;
   }
   
   /* gpio_data bit assignment */
   #define BCTV2_GPIO_ADDR_MASK     0x000300
   #define BCTV2_GPIO_WE            0x000400
   #define BCTV2_GPIO_OE            0x000800
   #define BCTV2_GPIO_VAL_MASK      0x00f000
   
   #define BCTV2_GPIO_PORT_MASK     3
   #define BCTV2_GPIO_ADDR_SHIFT    8
   #define BCTV2_GPIO_VAL_SHIFT     12
   
   /* gpio_out_en value for read/write */
   #define BCTV2_GPIO_OUT_RMASK     0x000f00
   #define BCTV2_GPIO_OUT_WMASK     0x00ff00
   
   #define BCTV2_BITS       100
   
   void
   bctv2_gpio_write( bktr_ptr_t bktr, int port, int val )
   {
           u_long data, outbits;
   
           port &= BCTV2_GPIO_PORT_MASK;
           switch (port) {
           case 1:
           case 3:
                   data = ((val << BCTV2_GPIO_VAL_SHIFT) & BCTV2_GPIO_VAL_MASK) |
                          ((port << BCTV2_GPIO_ADDR_SHIFT) & BCTV2_GPIO_ADDR_MASK) |
                          BCTV2_GPIO_WE | BCTV2_GPIO_OE;
                   outbits = BCTV2_GPIO_OUT_WMASK;
                   break;
           default:
                   return;
           }
           OUTL(bktr, BKTR_GPIO_OUT_EN, 0);
           OUTL(bktr, BKTR_GPIO_DATA, data);
           OUTL(bktr, BKTR_GPIO_OUT_EN, outbits);
           DELAY(BCTV2_BITS);
           OUTL(bktr, BKTR_GPIO_DATA, data & ~BCTV2_GPIO_WE);
           DELAY(BCTV2_BITS);
           OUTL(bktr, BKTR_GPIO_DATA, data);
           DELAY(BCTV2_BITS);
           OUTL(bktr, BKTR_GPIO_DATA, ~0);
           OUTL(bktr, BKTR_GPIO_OUT_EN, 0);
   }
   
   /* Not yet used
   int
   bctv2_gpio_read( bktr_ptr_t bktr, int port )
   {
           u_long data, outbits, ret;
   
           port &= BCTV2_GPIO_PORT_MASK;
           switch (port) {
           case 1:
           case 3:
                   data = ((port << BCTV2_GPIO_ADDR_SHIFT) & BCTV2_GPIO_ADDR_MASK) |
                          BCTV2_GPIO_WE | BCTV2_GPIO_OE;
                   outbits = BCTV2_GPIO_OUT_RMASK;
                   break;
           default:
                   return( -1 );
           }
           OUTL(bktr, BKTR_GPIO_OUT_EN, 0);
           OUTL(bktr, BKTR_GPIO_DATA, data);
           OUTL(bktr, BKTR_GPIO_OUT_EN, outbits);
           DELAY(BCTV2_BITS);
           OUTL(bktr, BKTR_GPIO_DATA, data & ~BCTV2_GPIO_OE);
           DELAY(BCTV2_BITS);
           ret = INL(bktr, BKTR_GPIO_DATA);
           DELAY(BCTV2_BITS);
           OUTL(bktr, BKTR_GPIO_DATA, data);
           DELAY(BCTV2_BITS);
           OUTL(bktr, BKTR_GPIO_DATA, ~0);
           OUTL(bktr, BKTR_GPIO_OUT_EN, 0);
           return( (ret & BCTV2_GPIO_VAL_MASK) >> BCTV2_GPIO_VAL_SHIFT );
   }
   */
   
   /*
    * setup the MSP34xx Stereo Audio Chip
    * This uses the Auto Configuration Option on MSP3410D and MSP3415D chips
    * and DBX mode selection for MSP3430G chips.
    * For MSP3400C support, the full programming sequence is required and is
    * not yet supported.
    */
   
   /* Read the MSP version string */
   void msp_read_id( bktr_ptr_t bktr ){
       int rev1=0, rev2=0;
       rev1 = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x001e);
       rev2 = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x001f);
   
       ksprintf(bktr->msp_version_string, "34%02d%c-%c%d",
         (rev2>>8)&0xff, (rev1&0xff)+'@', ((rev1>>8)&0xff)+'@', rev2&0x1f);
   
   }
   
   
   /* Configure the MSP chip to Auto-detect the audio format.
    * For the MSP3430G, we use fast autodetect mode
    * For the MSP3410/3415 there are two schemes for this
    *  a) Fast autodetection - the chip is put into autodetect mode, and the function
    *     returns immediatly. This works in most cases and is the Default Mode.
    *  b) Slow mode. The function sets the MSP3410/3415 chip, then waits for feedback from 
    *     the chip and re-programs it if needed.
    */
   void msp_autodetect( bktr_ptr_t bktr ) {
   
   #ifdef BKTR_NEW_MSP34XX_DRIVER
   
     /* Just wake up the (maybe) sleeping thread, it'll do everything for us */
     msp_wake_thread(bktr);
   
   #else
     int auto_detect, loops;
     int stereo;
   
     /* MSP3430G - countries with mono and DBX stereo */
     if (strncmp("3430G", bktr->msp_version_string, 5) == 0){
   
       msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0030,0x2003);/* Enable Auto format detection */
       msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0020,0x0020);/* Standard Select Reg. = BTSC-Stereo*/
       msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000E,0x2403);/* darned if I know */
       msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0320);/* Source select = (St or A) */
                                                                /* & Ch. Matrix = St */
       msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000,0x7300);/* Set volume to 0db gain */
     }
   
   
     /* MSP3415D SPECIAL CASE Use the Tuner's Mono audio ouput for the MSP */
     /* (for Hauppauge 44xxx card with Tuner Type 0x2a) */
     else if (  ( (strncmp("3415D", bktr->msp_version_string, 5) == 0)
                  &&(bktr->msp_use_mono_source == 1)
                 )
              || (bktr->slow_msp_audio == 2) ){
       msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000, 0x7300); /* 0 db volume */
       msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000d, 0x1900); /* scart prescale */
       msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008, 0x0220); /* SCART | STEREO */
       msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0013, 0x0100); /* DSP In = MONO IN */
     }
   
   
     /* MSP3410/MSP3415 - countries with mono, stereo using 2 FM channels and NICAM */
     /* FAST sound scheme */
     else if (bktr->slow_msp_audio == 0) {
       msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000,0x7300);/* Set volume to 0db gain */
       msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0000);/* Spkr Source = default(FM/AM) */
       msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0020,0x0001);/* Enable Auto format detection */
       msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0021,0x0001);/* Auto selection of NICAM/MONO mode */
     }
   
   
     /* MSP3410/MSP3415 - European Countries where the fast MSP3410/3415 programming fails */
     /* SLOW sound scheme */
     else if ( bktr->slow_msp_audio == 1) {
       msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000,0x7300);/* Set volume to 0db gain */
       msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0020,0x0001);/* Enable Auto format detection */
       
       /* wait for 0.5s max for terrestrial sound autodetection */
       loops = 10;
       do {
         DELAY(100000);
         auto_detect = msp_dpl_read(bktr, bktr->msp_addr, 0x10, 0x007e);
         loops++;
       } while (auto_detect > 0xff && loops < 50);
       if (bootverbose)kprintf ("%s: Result of autodetect after %dms: %d\n",
                               bktr_name(bktr), loops*10, auto_detect);
   
       /* Now set the audio baseband processing */
       switch (auto_detect) {
       case 0:                    /* no TV sound standard detected */
         break;
       case 2:                    /* M Dual FM */
         break;
       case 3:                    /* B/G Dual FM; German stereo */
         /* Read the stereo detection value from DSP reg 0x0018 */
         DELAY(20000);
         stereo = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x0018);
         if (bootverbose)kprintf ("%s: Stereo reg 0x18 a: %d\n",
                                 bktr_name(bktr), stereo);
         DELAY(20000);
         stereo = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x0018);
         if (bootverbose)kprintf ("%s: Stereo reg 0x18 b: %d\n",
                                 bktr_name(bktr), stereo); 
         DELAY(20000); 
         stereo = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x0018);
         if (bootverbose)kprintf ("%s: Stereo reg 0x18 c: %d\n",
                                 bktr_name(bktr), stereo);
         if (stereo > 0x0100 && stereo < 0x8000) { /* Seems to be stereo */
           msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0020);/* Loudspeaker set stereo*/
           /*
             set spatial effect strength to 50% enlargement
             set spatial effect mode b, stereo basewidth enlargment only
           */
           msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0005,0x3f28);
         } else if (stereo > 0x8000) {    /* bilingual mode */
           if (bootverbose) kprintf ("%s: Bilingual mode detected\n",
                                    bktr_name(bktr));
           msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0000);/* Loudspeaker */
           msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0005,0x0000);/* all spatial effects off */
          } else {                 /* must be mono */
           msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0030);/* Loudspeaker */
           /*
             set spatial effect strength to 50% enlargement
             set spatial effect mode a, stereo basewidth enlargment
             and pseudo stereo effect with automatic high-pass filter
           */
           msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0005,0x3f08);
         }
   #if 0
          /* The reset value for Channel matrix mode is FM/AM and SOUNDA/LEFT */
          /* We would like STEREO instead val: 0x0020 */
          msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0020);/* Loudspeaker */
          msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0009,0x0020);/* Headphone */
          msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000a,0x0020);/* SCART1 */
          msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0041,0x0020);/* SCART2 */
          msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000b,0x0020);/* I2S */
          msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000c,0x0020);/* Quasi-Peak Detector Source */
          msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000e,0x0001);
   #endif
         break;
       case 8:                    /* B/G FM NICAM */
          msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0021,0x0001);/* Auto selection of NICAM/MONO mode */
          break;
        case 9:                    /* L_AM NICAM or D/K*/
        case 10:                   /* i-FM NICAM */
          break;
        default:
          if (bootverbose) kprintf ("%s: Unknown autodetection result value: %d\n",
                                   bktr_name(bktr), auto_detect); 
        }
   
     }
   
   
     /* uncomment the following line to enable the MSP34xx 1Khz Tone Generator */
     /* turn your speaker volume down low before trying this */
     /* msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0014, 0x7f40); */
   
   #endif /* BKTR_NEW_MSP34XX_DRIVER */
   }
   
   /* Read the DPL version string */
   void dpl_read_id( bktr_ptr_t bktr ){
       int rev1=0, rev2=0;
       rev1 = msp_dpl_read(bktr, bktr->dpl_addr, 0x12, 0x001e);
       rev2 = msp_dpl_read(bktr, bktr->dpl_addr, 0x12, 0x001f);
   
       ksprintf(bktr->dpl_version_string, "34%02d%c-%c%d",
         ((rev2>>8)&0xff)-1, (rev1&0xff)+'@', ((rev1>>8)&0xff)+'@', rev2&0x1f);
   }
   
   /* Configure the DPL chip to Auto-detect the audio format */
   void dpl_autodetect( bktr_ptr_t bktr ) {
   
       /* The following are empiric values tried from the DPL35xx data sheet */
       msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x000c,0x0320);   /* quasi peak detector source dolby
                                                                   lr 0x03xx; quasi peak detector matrix
                                                                   stereo 0xXX20 */
       msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0040,0x0060);   /* Surround decoder mode;
                                                                   ADAPTIVE/3D-PANORAMA, that means two
                                                                   speakers and no center speaker, all
                                                                   channels L/R/C/S mixed to L and R */
       msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0041,0x0620);   /* surround source matrix;I2S2/STEREO*/
       msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0042,0x1F00);   /* surround delay 31ms max */
       msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0043,0x0000);   /* automatic surround input balance */
       msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0044,0x4000);   /* surround spatial effect 50%
                                                                   recommended*/
       msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0045,0x5400);   /* surround panorama effect 66%
                                                                   recommended with PANORAMA mode
                                                                   in 0x0040 set to panorama */
   }

Cache object: 372a2141b45d2e3f4ee49dff93b1d608