/* $OpenBSD: bktr_audio.c,v 1.2 2003/01/04 22:36:12 deraadt Exp $ */ /* $FreeBSD: src/sys/dev/bktr/bktr_audio.c,v 1.8 2000/10/31 13:09:56 roger 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. * */ /* * 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. */ #include #include #include #include #ifdef __FreeBSD__ #if (__FreeBSD_version < 500000) #include /* for DELAY */ #endif #include #if (__FreeBSD_version >=300000) #include /* for bus space */ #include #include #endif #endif #if defined(__NetBSD__) || defined(__OpenBSD__) #include #include /* NetBSD location of .h files */ #include #include #include #include #include #else #include /* Traditional location of .h files */ #include /* extensions to ioctl_meteor.h */ #include #include #include #include #include #endif /* * Prototypes for the GV_BCTV specific functions. */ void set_bctv_audio( bktr_ptr_t bktr ); void bctv_gpio_write( bktr_ptr_t bktr, int port, int val ); /*int bctv_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: printf("%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_GV ) { set_bctv_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)); printf("%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, PZERO, "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_BCTV specific functions. */ #define BCTV_AUDIO_MAIN 0x10 /* main audio program */ #define BCTV_AUDIO_SUB 0x20 /* sub audio program */ #define BCTV_AUDIO_BOTH 0x30 /* main(L) + sub(R) program */ #define BCTV_GPIO_REG0 1 #define BCTV_GPIO_REG1 3 #define BCTV_GR0_AUDIO_MODE 3 #define BCTV_GR0_AUDIO_MAIN 0 /* main program */ #define BCTV_GR0_AUDIO_SUB 3 /* sub program */ #define BCTV_GR0_AUDIO_BOTH 1 /* main(L) + sub(R) */ #define BCTV_GR0_AUDIO_MUTE 4 /* audio mute */ #define BCTV_GR0_AUDIO_MONO 8 /* force mono */ void set_bctv_audio( bktr_ptr_t bktr ) { int data; switch (bktr->audio_mux_select) { case 1: /* external */ case 2: /* internal */ bctv_gpio_write(bktr, BCTV_GPIO_REG1, 0); break; default: /* tuner */ bctv_gpio_write(bktr, BCTV_GPIO_REG1, 1); break; } /* switch (bktr->audio_sap_select) { */ switch (BCTV_AUDIO_BOTH) { case BCTV_AUDIO_SUB: data = BCTV_GR0_AUDIO_SUB; break; case BCTV_AUDIO_BOTH: data = BCTV_GR0_AUDIO_BOTH; break; case BCTV_AUDIO_MAIN: default: data = BCTV_GR0_AUDIO_MAIN; break; } if (bktr->audio_mute_state == TRUE) data |= BCTV_GR0_AUDIO_MUTE; bctv_gpio_write(bktr, BCTV_GPIO_REG0, data); return; } /* gpio_data bit assignment */ #define BCTV_GPIO_ADDR_MASK 0x000300 #define BCTV_GPIO_WE 0x000400 #define BCTV_GPIO_OE 0x000800 #define BCTV_GPIO_VAL_MASK 0x00f000 #define BCTV_GPIO_PORT_MASK 3 #define BCTV_GPIO_ADDR_SHIFT 8 #define BCTV_GPIO_VAL_SHIFT 12 /* gpio_out_en value for read/write */ #define BCTV_GPIO_OUT_RMASK 0x000f00 #define BCTV_GPIO_OUT_WMASK 0x00ff00 #define BCTV_BITS 100 void bctv_gpio_write( bktr_ptr_t bktr, int port, int val ) { u_long data, outbits; port &= BCTV_GPIO_PORT_MASK; switch (port) { case 1: case 3: data = ((val << BCTV_GPIO_VAL_SHIFT) & BCTV_GPIO_VAL_MASK) | ((port << BCTV_GPIO_ADDR_SHIFT) & BCTV_GPIO_ADDR_MASK) | BCTV_GPIO_WE | BCTV_GPIO_OE; outbits = BCTV_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(BCTV_BITS); OUTL(bktr, BKTR_GPIO_DATA, data & ~BCTV_GPIO_WE); DELAY(BCTV_BITS); OUTL(bktr, BKTR_GPIO_DATA, data); DELAY(BCTV_BITS); OUTL(bktr, BKTR_GPIO_DATA, ~0); OUTL(bktr, BKTR_GPIO_OUT_EN, 0); } /* Not yet used int bctv_gpio_read( bktr_ptr_t bktr, int port ) { u_long data, outbits, ret; port &= BCTV_GPIO_PORT_MASK; switch (port) { case 1: case 3: data = ((port << BCTV_GPIO_ADDR_SHIFT) & BCTV_GPIO_ADDR_MASK) | BCTV_GPIO_WE | BCTV_GPIO_OE; outbits = BCTV_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(BCTV_BITS); OUTL(bktr, BKTR_GPIO_DATA, data & ~BCTV_GPIO_OE); DELAY(BCTV_BITS); ret = INL(bktr, BKTR_GPIO_DATA); DELAY(BCTV_BITS); OUTL(bktr, BKTR_GPIO_DATA, data); DELAY(BCTV_BITS); OUTL(bktr, BKTR_GPIO_DATA, ~0); OUTL(bktr, BKTR_GPIO_OUT_EN, 0); return( (ret & BCTV_GPIO_VAL_MASK) >> BCTV_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); sprintf(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 ) { 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 output 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)printf ("%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)printf ("%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)printf ("%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)printf ("%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) printf ("%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) printf ("%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); */ } /* 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); sprintf(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 */ }