bktr_audio.c revision 68071 
1/* $FreeBSD: head/sys/dev/bktr/bktr_audio.c 68071 2000-10-31 13:09:56Z roger $ */
2/*
3 * This is part of the Driver for Video Capture Cards (Frame grabbers)
4 * and TV Tuner cards using the Brooktree Bt848, Bt848A, Bt849A, Bt878, Bt879
5 * chipset.
6 * Copyright Roger Hardiman and Amancio Hasty.
7 *
8 * bktr_audio : This deals with controlling the audio on TV cards,
9 *                controlling the Audio Multiplexer (audio source selector).
10 *                controlling any MSP34xx stereo audio decoders.
11 *                controlling any DPL35xx dolby surroud sound audio decoders.
12 *                initialising TDA98xx audio devices.
13 *
14 */
15
16/*
17 * 1. Redistributions of source code must retain the
18 * Copyright (c) 1997 Amancio Hasty, 1999 Roger Hardiman
19 * All rights reserved.
20 *
21 * Redistribution and use in source and binary forms, with or without
22 * modification, are permitted provided that the following conditions
23 * are met:
24 * 1. Redistributions of source code must retain the above copyright
25 *    notice, this list of conditions and the following disclaimer.
26 * 2. Redistributions in binary form must reproduce the above copyright
27 *    notice, this list of conditions and the following disclaimer in the
28 *    documentation and/or other materials provided with the distribution.
29 * 3. All advertising materials mentioning features or use of this software
30 *    must display the following acknowledgement:
31 *      This product includes software developed by Amancio Hasty and
32 *      Roger Hardiman
33 * 4. The name of the author may not be used to endorse or promote products
34 *    derived from this software without specific prior written permission.
35 *
36 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
37 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
38 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
39 * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
40 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
41 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
42 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
43 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
44 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
45 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
46 * POSSIBILITY OF SUCH DAMAGE.
47 */
48
49#include <sys/param.h>
50#include <sys/systm.h>
51#include <sys/kernel.h>
52#include <sys/vnode.h>
53
54#ifdef __FreeBSD__
55
56#if (__FreeBSD_version < 500000)
57#include <machine/clock.h>              /* for DELAY */
58#endif
59
60#include <pci/pcivar.h>
61
62#if (__FreeBSD_version >=300000)
63#include <machine/bus_memio.h>		/* for bus space */
64#include <machine/bus.h>
65#include <sys/bus.h>
66#endif
67#endif
68
69#ifdef __NetBSD__
70#include <sys/proc.h>
71#include <dev/ic/bt8xx.h>	/* NetBSD location of .h files */
72#include <dev/pci/bktr/bktr_reg.h>
73#include <dev/pci/bktr/bktr_core.h>
74#include <dev/pci/bktr/bktr_tuner.h>
75#include <dev/pci/bktr/bktr_card.h>
76#include <dev/pci/bktr/bktr_audio.h>
77#else
78#include <machine/ioctl_meteor.h>	/* Traditional location of .h files */
79#include <machine/ioctl_bt848.h>        /* extensions to ioctl_meteor.h */
80#include <dev/bktr/bktr_reg.h>
81#include <dev/bktr/bktr_core.h>
82#include <dev/bktr/bktr_tuner.h>
83#include <dev/bktr/bktr_card.h>
84#include <dev/bktr/bktr_audio.h>
85#endif
86
87/*
88 * Prototypes for the GV_BCTV specific functions.
89 */
90void    set_bctv_audio( bktr_ptr_t bktr );
91void    bctv_gpio_write( bktr_ptr_t bktr, int port, int val );
92/*int   bctv_gpio_read( bktr_ptr_t bktr, int port );*/ /* Not used */
93
94
95
96/*
97 * init_audio_devices
98 * Reset any MSP34xx or TDA98xx audio devices.
99 */
100void init_audio_devices( bktr_ptr_t bktr ) {
101
102        /* enable stereo if appropriate on TDA audio chip */
103        if ( bktr->card.dbx )
104                init_BTSC( bktr );
105
106        /* reset the MSP34xx stereo audio chip */
107        if ( bktr->card.msp3400c )
108                msp_dpl_reset( bktr, bktr->msp_addr );
109
110        /* reset the DPL35xx dolby audio chip */
111        if ( bktr->card.dpl3518a )
112                msp_dpl_reset( bktr, bktr->dpl_addr );
113
114}
115
116
117/*
118 *
119 */
120#define AUDIOMUX_DISCOVER_NOT
121int
122set_audio( bktr_ptr_t bktr, int cmd )
123{
124	u_long		temp;
125	volatile u_char	idx;
126
127#if defined( AUDIOMUX_DISCOVER )
128	if ( cmd >= 200 )
129		cmd -= 200;
130	else
131#endif /* AUDIOMUX_DISCOVER */
132
133	/* check for existance of audio MUXes */
134	if ( !bktr->card.audiomuxs[ 4 ] )
135		return( -1 );
136
137	switch (cmd) {
138	case AUDIO_TUNER:
139#ifdef BKTR_REVERSEMUTE
140		bktr->audio_mux_select = 3;
141#else
142		bktr->audio_mux_select = 0;
143#endif
144
145		if (bktr->reverse_mute )
146		      bktr->audio_mux_select = 0;
147		else
148		    bktr->audio_mux_select = 3;
149
150		break;
151	case AUDIO_EXTERN:
152		bktr->audio_mux_select = 1;
153		break;
154	case AUDIO_INTERN:
155		bktr->audio_mux_select = 2;
156		break;
157	case AUDIO_MUTE:
158		bktr->audio_mute_state = TRUE;	/* set mute */
159		break;
160	case AUDIO_UNMUTE:
161		bktr->audio_mute_state = FALSE;	/* clear mute */
162		break;
163	default:
164		printf("%s: audio cmd error %02x\n", bktr_name(bktr),
165		       cmd);
166		return( -1 );
167	}
168
169
170	/* Most cards have a simple audio multiplexer to select the
171	 * audio source. The I/O_GV card has a more advanced multiplexer
172	 * and requires special handling.
173	 */
174        if ( bktr->bt848_card == CARD_IO_GV ) {
175                set_bctv_audio( bktr );
176                return( 0 );
177	}
178
179	/* Proceed with the simpler audio multiplexer code for the majority
180	 * of Bt848 cards.
181	 */
182
183	/*
184	 * Leave the upper bits of the GPIO port alone in case they control
185	 * something like the dbx or teletext chips.  This doesn't guarantee
186	 * success, but follows the rule of least astonishment.
187	 */
188
189	if ( bktr->audio_mute_state == TRUE ) {
190#ifdef BKTR_REVERSEMUTE
191		idx = 0;
192#else
193		idx = 3;
194#endif
195
196		if (bktr->reverse_mute )
197		  idx  = 3;
198		else
199		  idx  = 0;
200
201	}
202	else
203		idx = bktr->audio_mux_select;
204
205
206	temp = INL(bktr, BKTR_GPIO_DATA) & ~bktr->card.gpio_mux_bits;
207#if defined( AUDIOMUX_DISCOVER )
208	OUTL(bktr, BKTR_GPIO_DATA, temp | (cmd & 0xff));
209	printf("%s: cmd: %d audio mux %x temp %x \n", bktr_name(bktr),
210	  	cmd, bktr->card.audiomuxs[ idx ], temp );
211#else
212	OUTL(bktr, BKTR_GPIO_DATA, temp | bktr->card.audiomuxs[ idx ]);
213#endif /* AUDIOMUX_DISCOVER */
214
215
216
217	/* Some new Hauppauge cards do not have an audio mux */
218	/* Instead we use the MSP34xx chip to select TV audio, Line-In */
219	/* FM Radio and Mute */
220	/* Examples of this are the Hauppauge 44xxx MSP34xx models */
221	/* It is ok to drive both the mux and the MSP34xx chip. */
222	/* If there is no mux, the MSP does the switching of the audio source */
223	/* If there is a mux, it does the switching of the audio source */
224
225	if ((bktr->card.msp3400c) && (bktr->audio_mux_present == 0)) {
226
227	  if (bktr->audio_mute_state == TRUE ) {
228		 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000, 0x0000); /* volume to MUTE */
229	  } else {
230		 if(bktr->audio_mux_select == 0) { /* TV Tuner */
231		    msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000, 0x7300); /* 0 db volume */
232		    if (bktr->msp_source_selected != 0) msp_autodetect(bktr);  /* setup TV audio mode */
233		    bktr->msp_source_selected = 0;
234		 }
235		 if(bktr->audio_mux_select == 1) { /* Line In */
236		    msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000, 0x7300); /* 0 db volume */
237		    msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000d, 0x1900); /* scart prescale */
238		    msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008, 0x0220); /* SCART | STEREO */
239		    msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0013, 0x0000); /* DSP In = SC1_IN_L/R */
240		    bktr->msp_source_selected = 1;
241		 }
242
243		 if(bktr->audio_mux_select == 2) { /* FM Radio */
244		    msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000, 0x7300); /* 0 db volume */
245		    msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000d, 0x1900); /* scart prescale */
246		    msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008, 0x0220); /* SCART | STEREO */
247		    msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0013, 0x0200); /* DSP In = SC2_IN_L/R */
248		    bktr->msp_source_selected = 2;
249		 }
250	  }
251	}
252
253
254	return( 0 );
255}
256
257
258/*
259 *
260 */
261void
262temp_mute( bktr_ptr_t bktr, int flag )
263{
264	static int	muteState = FALSE;
265
266	if ( flag == TRUE ) {
267		muteState = bktr->audio_mute_state;
268		set_audio( bktr, AUDIO_MUTE );		/* prevent 'click' */
269	}
270	else {
271		tsleep( BKTR_SLEEP, PZERO, "tuning", hz/8 );
272		if ( muteState == FALSE )
273			set_audio( bktr, AUDIO_UNMUTE );
274	}
275}
276
277/* address of BTSC/SAP decoder chip */
278#define TDA9850_WADDR           0xb6
279#define TDA9850_RADDR           0xb7
280
281
282/* registers in the TDA9850 BTSC/dbx chip */
283#define CON1ADDR                0x04
284#define CON2ADDR                0x05
285#define CON3ADDR                0x06
286#define CON4ADDR                0x07
287#define ALI1ADDR                0x08
288#define ALI2ADDR                0x09
289#define ALI3ADDR                0x0a
290
291/*
292 * initialise the dbx chip
293 * taken from the Linux bttv driver TDA9850 initialisation code
294 */
295void
296init_BTSC( bktr_ptr_t bktr )
297{
298    i2cWrite(bktr, TDA9850_WADDR, CON1ADDR, 0x08); /* noise threshold st */
299    i2cWrite(bktr, TDA9850_WADDR, CON2ADDR, 0x08); /* noise threshold sap */
300    i2cWrite(bktr, TDA9850_WADDR, CON3ADDR, 0x40); /* stereo mode */
301    i2cWrite(bktr, TDA9850_WADDR, CON4ADDR, 0x07); /* 0 dB input gain? */
302    i2cWrite(bktr, TDA9850_WADDR, ALI1ADDR, 0x10); /* wideband alignment? */
303    i2cWrite(bktr, TDA9850_WADDR, ALI2ADDR, 0x10); /* spectral alignment? */
304    i2cWrite(bktr, TDA9850_WADDR, ALI3ADDR, 0x03);
305}
306
307/*
308 * setup the dbx chip
309 * XXX FIXME: alot of work to be done here, this merely unmutes it.
310 */
311int
312set_BTSC( bktr_ptr_t bktr, int control )
313{
314	return( i2cWrite( bktr, TDA9850_WADDR, CON3ADDR, control ) );
315}
316
317/*
318 * CARD_GV_BCTV specific functions.
319 */
320
321#define BCTV_AUDIO_MAIN              0x10    /* main audio program */
322#define BCTV_AUDIO_SUB               0x20    /* sub audio program */
323#define BCTV_AUDIO_BOTH              0x30    /* main(L) + sub(R) program */
324
325#define BCTV_GPIO_REG0          1
326#define BCTV_GPIO_REG1          3
327
328#define BCTV_GR0_AUDIO_MODE     3
329#define BCTV_GR0_AUDIO_MAIN     0       /* main program */
330#define BCTV_GR0_AUDIO_SUB      3       /* sub program */
331#define BCTV_GR0_AUDIO_BOTH     1       /* main(L) + sub(R) */
332#define BCTV_GR0_AUDIO_MUTE     4       /* audio mute */
333#define BCTV_GR0_AUDIO_MONO     8       /* force mono */
334
335void
336set_bctv_audio( bktr_ptr_t bktr )
337{
338        int data;
339
340        switch (bktr->audio_mux_select) {
341        case 1:         /* external */
342        case 2:         /* internal */
343                bctv_gpio_write(bktr, BCTV_GPIO_REG1, 0);
344                break;
345        default:        /* tuner */
346                bctv_gpio_write(bktr, BCTV_GPIO_REG1, 1);
347                break;
348        }
349/*      switch (bktr->audio_sap_select) { */
350        switch (BCTV_AUDIO_BOTH) {
351        case BCTV_AUDIO_SUB:
352                data = BCTV_GR0_AUDIO_SUB;
353                break;
354        case BCTV_AUDIO_BOTH:
355                data = BCTV_GR0_AUDIO_BOTH;
356                break;
357        case BCTV_AUDIO_MAIN:
358        default:
359                data = BCTV_GR0_AUDIO_MAIN;
360                break;
361        }
362        if (bktr->audio_mute_state == TRUE)
363                data |= BCTV_GR0_AUDIO_MUTE;
364
365        bctv_gpio_write(bktr, BCTV_GPIO_REG0, data);
366
367        return;
368}
369
370/* gpio_data bit assignment */
371#define BCTV_GPIO_ADDR_MASK     0x000300
372#define BCTV_GPIO_WE            0x000400
373#define BCTV_GPIO_OE            0x000800
374#define BCTV_GPIO_VAL_MASK      0x00f000
375
376#define BCTV_GPIO_PORT_MASK     3
377#define BCTV_GPIO_ADDR_SHIFT    8
378#define BCTV_GPIO_VAL_SHIFT     12
379
380/* gpio_out_en value for read/write */
381#define BCTV_GPIO_OUT_RMASK     0x000f00
382#define BCTV_GPIO_OUT_WMASK     0x00ff00
383
384#define BCTV_BITS       100
385
386void
387bctv_gpio_write( bktr_ptr_t bktr, int port, int val )
388{
389        u_long data, outbits;
390
391        port &= BCTV_GPIO_PORT_MASK;
392        switch (port) {
393        case 1:
394        case 3:
395                data = ((val << BCTV_GPIO_VAL_SHIFT) & BCTV_GPIO_VAL_MASK) |
396                       ((port << BCTV_GPIO_ADDR_SHIFT) & BCTV_GPIO_ADDR_MASK) |
397                       BCTV_GPIO_WE | BCTV_GPIO_OE;
398                outbits = BCTV_GPIO_OUT_WMASK;
399                break;
400        default:
401                return;
402        }
403        OUTL(bktr, BKTR_GPIO_OUT_EN, 0);
404        OUTL(bktr, BKTR_GPIO_DATA, data);
405        OUTL(bktr, BKTR_GPIO_OUT_EN, outbits);
406        DELAY(BCTV_BITS);
407        OUTL(bktr, BKTR_GPIO_DATA, data & ~BCTV_GPIO_WE);
408        DELAY(BCTV_BITS);
409        OUTL(bktr, BKTR_GPIO_DATA, data);
410        DELAY(BCTV_BITS);
411        OUTL(bktr, BKTR_GPIO_DATA, ~0);
412        OUTL(bktr, BKTR_GPIO_OUT_EN, 0);
413}
414
415/* Not yet used
416int
417bctv_gpio_read( bktr_ptr_t bktr, int port )
418{
419        u_long data, outbits, ret;
420
421        port &= BCTV_GPIO_PORT_MASK;
422        switch (port) {
423        case 1:
424        case 3:
425                data = ((port << BCTV_GPIO_ADDR_SHIFT) & BCTV_GPIO_ADDR_MASK) |
426                       BCTV_GPIO_WE | BCTV_GPIO_OE;
427                outbits = BCTV_GPIO_OUT_RMASK;
428                break;
429        default:
430                return( -1 );
431        }
432        OUTL(bktr, BKTR_GPIO_OUT_EN, 0);
433        OUTL(bktr, BKTR_GPIO_DATA, data);
434        OUTL(bktr, BKTR_GPIO_OUT_EN, outbits);
435        DELAY(BCTV_BITS);
436        OUTL(bktr, BKTR_GPIO_DATA, data & ~BCTV_GPIO_OE);
437        DELAY(BCTV_BITS);
438        ret = INL(bktr, BKTR_GPIO_DATA);
439        DELAY(BCTV_BITS);
440        OUTL(bktr, BKTR_GPIO_DATA, data);
441        DELAY(BCTV_BITS);
442        OUTL(bktr, BKTR_GPIO_DATA, ~0);
443        OUTL(bktr, BKTR_GPIO_OUT_EN, 0);
444        return( (ret & BCTV_GPIO_VAL_MASK) >> BCTV_GPIO_VAL_SHIFT );
445}
446*/
447
448/*
449 * setup the MSP34xx Stereo Audio Chip
450 * This uses the Auto Configuration Option on MSP3410D and MSP3415D chips
451 * and DBX mode selection for MSP3430G chips.
452 * For MSP3400C support, the full programming sequence is required and is
453 * not yet supported.
454 */
455
456/* Read the MSP version string */
457void msp_read_id( bktr_ptr_t bktr ){
458    int rev1=0, rev2=0;
459    rev1 = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x001e);
460    rev2 = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x001f);
461
462    sprintf(bktr->msp_version_string, "34%02d%c-%c%d",
463      (rev2>>8)&0xff, (rev1&0xff)+'@', ((rev1>>8)&0xff)+'@', rev2&0x1f);
464
465}
466
467
468/* Configure the MSP chip to Auto-detect the audio format.
469 * For the MSP3430G, we use fast autodetect mode
470 * For the MSP3410/3415 there are two schemes for this
471 *  a) Fast autodetection - the chip is put into autodetect mode, and the function
472 *     returns immediatly. This works in most cases and is the Default Mode.
473 *  b) Slow mode. The function sets the MSP3410/3415 chip, then waits for feedback from
474 *     the chip and re-programs it if needed.
475 */
476void msp_autodetect( bktr_ptr_t bktr ) {
477  int auto_detect, loops;
478  int stereo;
479
480  /* MSP3430G - countries with mono and DBX stereo */
481  if (strncmp("3430G", bktr->msp_version_string, 5) == 0){
482
483    msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0030,0x2003);/* Enable Auto format detection */
484    msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0020,0x0020);/* Standard Select Reg. = BTSC-Stereo*/
485    msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000E,0x2403);/* darned if I know */
486    msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0320);/* Source select = (St or A) */
487					                     /* & Ch. Matrix = St */
488    msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000,0x7300);/* Set volume to 0db gain */
489  }
490
491
492  /* MSP3415D SPECIAL CASE Use the Tuner's Mono audio ouput for the MSP */
493  /* (for Hauppauge 44xxx card with Tuner Type 0x2a) */
494  else if (  ( (strncmp("3415D", bktr->msp_version_string, 5) == 0)
495               &&(bktr->msp_use_mono_source == 1)
496              )
497           || (bktr->slow_msp_audio == 2) ){
498    msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000, 0x7300); /* 0 db volume */
499    msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000d, 0x1900); /* scart prescale */
500    msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008, 0x0220); /* SCART | STEREO */
501    msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0013, 0x0100); /* DSP In = MONO IN */
502  }
503
504
505  /* MSP3410/MSP3415 - countries with mono, stereo using 2 FM channels and NICAM */
506  /* FAST sound scheme */
507  else if (bktr->slow_msp_audio == 0) {
508    msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000,0x7300);/* Set volume to 0db gain */
509    msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0000);/* Spkr Source = default(FM/AM) */
510    msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0020,0x0001);/* Enable Auto format detection */
511    msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0021,0x0001);/* Auto selection of NICAM/MONO mode */
512  }
513
514
515  /* MSP3410/MSP3415 - European Countries where the fast MSP3410/3415 programming fails */
516  /* SLOW sound scheme */
517  else if ( bktr->slow_msp_audio == 1) {
518    msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000,0x7300);/* Set volume to 0db gain */
519    msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0020,0x0001);/* Enable Auto format detection */
520
521    /* wait for 0.5s max for terrestrial sound autodetection */
522    loops = 10;
523    do {
524      DELAY(100000);
525      auto_detect = msp_dpl_read(bktr, bktr->msp_addr, 0x10, 0x007e);
526      loops++;
527    } while (auto_detect > 0xff && loops < 50);
528    if (bootverbose)printf ("%s: Result of autodetect after %dms: %d\n",
529			    bktr_name(bktr), loops*10, auto_detect);
530
531    /* Now set the audio baseband processing */
532    switch (auto_detect) {
533    case 0:                    /* no TV sound standard detected */
534      break;
535    case 2:                    /* M Dual FM */
536      break;
537    case 3:                    /* B/G Dual FM; German stereo */
538      /* Read the stereo detection value from DSP reg 0x0018 */
539      DELAY(20000);
540      stereo = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x0018);
541      if (bootverbose)printf ("%s: Stereo reg 0x18 a: %d\n",
542			      bktr_name(bktr), stereo);
543      DELAY(20000);
544      stereo = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x0018);
545      if (bootverbose)printf ("%s: Stereo reg 0x18 b: %d\n",
546			      bktr_name(bktr), stereo);
547      DELAY(20000);
548      stereo = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x0018);
549      if (bootverbose)printf ("%s: Stereo reg 0x18 c: %d\n",
550			      bktr_name(bktr), stereo);
551      if (stereo > 0x0100 && stereo < 0x8000) { /* Seems to be stereo */
552        msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0020);/* Loudspeaker set stereo*/
553        /*
554          set spatial effect strength to 50% enlargement
555          set spatial effect mode b, stereo basewidth enlargment only
556        */
557        msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0005,0x3f28);
558      } else if (stereo > 0x8000) {    /* bilingual mode */
559        if (bootverbose) printf ("%s: Bilingual mode detected\n",
560				 bktr_name(bktr));
561        msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0000);/* Loudspeaker */
562        msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0005,0x0000);/* all spatial effects off */
563       } else {                 /* must be mono */
564        msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0030);/* Loudspeaker */
565        /*
566          set spatial effect strength to 50% enlargement
567          set spatial effect mode a, stereo basewidth enlargment
568          and pseudo stereo effect with automatic high-pass filter
569        */
570        msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0005,0x3f08);
571      }
572#if 0
573       /* The reset value for Channel matrix mode is FM/AM and SOUNDA/LEFT */
574       /* We would like STEREO instead val: 0x0020 */
575       msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0020);/* Loudspeaker */
576       msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0009,0x0020);/* Headphone */
577       msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000a,0x0020);/* SCART1 */
578       msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0041,0x0020);/* SCART2 */
579       msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000b,0x0020);/* I2S */
580       msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000c,0x0020);/* Quasi-Peak Detector Source */
581       msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000e,0x0001);
582#endif
583      break;
584    case 8:                    /* B/G FM NICAM */
585       msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0021,0x0001);/* Auto selection of NICAM/MONO mode */
586       break;
587     case 9:                    /* L_AM NICAM or D/K*/
588     case 10:                   /* i-FM NICAM */
589       break;
590     default:
591       if (bootverbose) printf ("%s: Unknown autodetection result value: %d\n",
592				bktr_name(bktr), auto_detect);
593     }
594
595  }
596
597
598  /* uncomment the following line to enable the MSP34xx 1Khz Tone Generator */
599  /* turn your speaker volume down low before trying this */
600  /* msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0014, 0x7f40); */
601}
602
603/* Read the DPL version string */
604void dpl_read_id( bktr_ptr_t bktr ){
605    int rev1=0, rev2=0;
606    rev1 = msp_dpl_read(bktr, bktr->dpl_addr, 0x12, 0x001e);
607    rev2 = msp_dpl_read(bktr, bktr->dpl_addr, 0x12, 0x001f);
608
609    sprintf(bktr->dpl_version_string, "34%02d%c-%c%d",
610      ((rev2>>8)&0xff)-1, (rev1&0xff)+'@', ((rev1>>8)&0xff)+'@', rev2&0x1f);
611}
612
613/* Configure the DPL chip to Auto-detect the audio format */
614void dpl_autodetect( bktr_ptr_t bktr ) {
615
616    /* The following are empiric values tried from the DPL35xx data sheet */
617    msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x000c,0x0320);	/* quasi peak detector source dolby
618								lr 0x03xx; quasi peak detector matrix
619								stereo 0xXX20 */
620    msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0040,0x0060);	/* Surround decoder mode;
621								ADAPTIVE/3D-PANORAMA, that means two
622								speakers and no center speaker, all
623								channels L/R/C/S mixed to L and R */
624    msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0041,0x0620);	/* surround source matrix;I2S2/STEREO*/
625    msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0042,0x1F00);	/* surround delay 31ms max */
626    msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0043,0x0000);	/* automatic surround input balance */
627    msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0044,0x4000);	/* surround spatial effect 50%
628								recommended*/
629    msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0045,0x5400);	/* surround panorama effect 66%
630								recommended with PANORAMA mode
631								in 0x0040 set to panorama */
632}
633
634