tvaudio.c

saa7134-0.2.9.tar.gz 电视卡驱动程序

	mode = VIDEO_SOUND_MONO;

	if(-1 == (dsr = chip_read2(chip,TDA9874A_DSR)))
		return mode;
	if(-1 == (nsr = chip_read2(chip,TDA9874A_NSR)))
		return mode;
	if(-1 == (necr = chip_read2(chip,TDA9874A_NECR)))
		return mode;

	/* need to store dsr/nsr somewhere */
	chip->shadow.bytes[MAXREGS-2] = dsr;
	chip->shadow.bytes[MAXREGS-1] = nsr;

	if(tda9874a_mode) {
		/* Note: DSR.RSSF and DSR.AMSTAT bits are also checked.
		 * If NICAM auto-muting is enabled, DSR.AMSTAT=1 indicates
		 * that sound has (temporarily) switched from NICAM to
		 * mono FM (or AM) on 1st sound carrier due to high NICAM bit
		 * error count. So in fact there is no stereo in this case :-(
		 * But changing the mode to VIDEO_SOUND_MONO would switch
		 * external 4052 multiplexer in audio_hook().
		 */
#if 0
		if((nsr & 0x02) && !(dsr & 0x10)) /* NSR.S/MB=1 and DSR.AMSTAT=0 */
			mode |= VIDEO_SOUND_STEREO;
#else
		if(nsr & 0x02) /* NSR.S/MB=1 */
			mode |= VIDEO_SOUND_STEREO;
#endif
		if(nsr & 0x01) /* NSR.D/SB=1 */ 
			mode |= VIDEO_SOUND_LANG1 | VIDEO_SOUND_LANG2;
	} else {
		if(dsr & 0x02) /* DSR.IDSTE=1 */
			mode |= VIDEO_SOUND_STEREO;
		if(dsr & 0x04) /* DSR.IDDUA=1 */
			mode |= VIDEO_SOUND_LANG1 | VIDEO_SOUND_LANG2;
	}

	dprintk("tda9874a_getmode(): DSR=0x%X, NSR=0x%X, NECR=0x%X, return: %d.\n",
		 dsr, nsr, necr, mode);
	return mode;
}

static void tda9874a_setmode(struct CHIPSTATE *chip, int mode)
{
	/* Disable/enable NICAM auto-muting (based on DSR.RSSF status bit). */
	/* If auto-muting is disabled, we can hear a signal of degrading quality. */
	if(tda9874a_mode) {
		if(chip->shadow.bytes[MAXREGS-2] & 0x20) /* DSR.RSSF=1 */
			tda9874a_NCONR &= 0xfe; /* enable */
		else
			tda9874a_NCONR |= 0x01; /* disable */
		chip_write(chip, TDA9874A_NCONR, tda9874a_NCONR);
	}

	/* Note: TDA9874A supports automatic FM dematrixing (FMMR register)
	 * and has auto-select function for audio output (AOSR register).
	 * Old TDA9874H doesn't support these features.
	 * TDA9874A also has additional mono output pin (OUTM), which
	 * on same (all?) tv-cards is not used, anyway (as well as MONOIN).
	 */
	if(tda9874a_dic == 0x11) {
		int aosr = 0x80;
		int mdacosr = (tda9874a_mode) ? 0x82:0x80;

		switch(mode) {
		case VIDEO_SOUND_MONO:
		case VIDEO_SOUND_STEREO:
			break;
		case VIDEO_SOUND_LANG1:
			aosr = 0x80; /* auto-select, dual A/A */
			mdacosr = (tda9874a_mode) ? 0x82:0x80;
			break;
		case VIDEO_SOUND_LANG2:
			aosr = 0xa0; /* auto-select, dual B/B */
			mdacosr = (tda9874a_mode) ? 0x83:0x81;
			break;
		default:
			chip->mode = 0;
			return;
		}
		chip_write(chip, TDA9874A_AOSR, aosr);
		chip_write(chip, TDA9874A_MDACOSR, mdacosr);

		dprintk("tda9874a_setmode(): req. mode %d; AOSR=0x%X, MDACOSR=0x%X.\n",
			mode, aosr, mdacosr);

	} else { /* dic == 0x07 */
		int fmmr,aosr;

		switch(mode) {
		case VIDEO_SOUND_MONO:
			fmmr = 0x00; /* mono */
			aosr = 0x10; /* A/A */
			break;
		case VIDEO_SOUND_STEREO:
			if(tda9874a_mode) {
				fmmr = 0x00;
				aosr = 0x00; /* handled by NICAM auto-mute */
			} else {
				fmmr = (tda9874a_ESP == 1) ? 0x05 : 0x04; /* stereo */
				aosr = 0x00;
			}
			break;
		case VIDEO_SOUND_LANG1:
			fmmr = 0x02; /* dual */
			aosr = 0x10; /* dual A/A */
			break;
		case VIDEO_SOUND_LANG2:
			fmmr = 0x02; /* dual */
			aosr = 0x20; /* dual B/B */
			break;
		default:
			chip->mode = 0;
			return;
		}
		chip_write(chip, TDA9874A_FMMR, fmmr);
		chip_write(chip, TDA9874A_AOSR, aosr);

		dprintk("tda9874a_setmode(): req. mode %d; FMMR=0x%X, AOSR=0x%X.\n",
			mode, fmmr, aosr);
	}
}

static int tda9874a_checkit(struct CHIPSTATE *chip)
{
	int dic,sic;	/* device id. and software id. codes */

	if(-1 == (dic = chip_read2(chip,TDA9874A_DIC)))
		return 0;
	if(-1 == (sic = chip_read2(chip,TDA9874A_SIC)))
		return 0;

	dprintk("tda9874a_checkit(): DIC=0x%X, SIC=0x%X.\n", dic, sic);

	if((dic == 0x11)||(dic == 0x07)) {
		printk("tvaudio: found tda9874%s.\n", (dic == 0x11) ? "a":"h");
		tda9874a_dic = dic;	/* remember device id. */
		return 1;
	}
	return 0;	/* not found */
}

static int tda9874a_initialize(struct CHIPSTATE *chip)
{
	if (tda9874a_SIF > 2)
		tda9874a_SIF = 1;
	if (tda9874a_STD >= 8)
		tda9874a_STD = 0;
	if(tda9874a_AMSEL > 1)
		tda9874a_AMSEL = 0;

	if(tda9874a_SIF == 1)
		tda9874a_GCONR = 0xc0;	/* sound IF input 1 */
	else
		tda9874a_GCONR = 0xc1;	/* sound IF input 2 */

	tda9874a_ESP = tda9874a_STD;
	tda9874a_mode = (tda9874a_STD < 5) ? 0 : 1;

	if(tda9874a_AMSEL == 0)
		tda9874a_NCONR = 0x01; /* auto-mute: analog mono input */
	else
		tda9874a_NCONR = 0x05; /* auto-mute: 1st carrier FM or AM */

	tda9874a_setup(chip);
	return 0;
}


/* ---------------------------------------------------------------------- */
/* audio chip descriptions - defines+functions for tea6420                */

#define TEA6300_VL         0x00  /* volume left */
#define TEA6300_VR         0x01  /* volume right */
#define TEA6300_BA         0x02  /* bass */
#define TEA6300_TR         0x03  /* treble */
#define TEA6300_FA         0x04  /* fader control */
#define TEA6300_S          0x05  /* switch register */
                                 /* values for those registers: */
#define TEA6300_S_SA       0x01  /* stereo A input */
#define TEA6300_S_SB       0x02  /* stereo B */
#define TEA6300_S_SC       0x04  /* stereo C */
#define TEA6300_S_GMU      0x80  /* general mute */

#define TEA6420_S_SA       0x00  /* stereo A input */
#define TEA6420_S_SB       0x01  /* stereo B */
#define TEA6420_S_SC       0x02  /* stereo C */
#define TEA6420_S_SD       0x03  /* stereo D */
#define TEA6420_S_SE       0x04  /* stereo E */
#define TEA6420_S_GMU      0x05  /* general mute */

static int tea6300_shift10(int val) { return val >> 10; }
static int tea6300_shift12(int val) { return val >> 12; }


/* ---------------------------------------------------------------------- */
/* audio chip descriptions - defines+functions for tda8425                */

#define TDA8425_VL         0x00  /* volume left */
#define TDA8425_VR         0x01  /* volume right */
#define TDA8425_BA         0x02  /* bass */
#define TDA8425_TR         0x03  /* treble */
#define TDA8425_S1         0x08  /* switch functions */
                                 /* values for those registers: */
#define TDA8425_S1_OFF     0xEE  /* audio off (mute on) */
#define TDA8425_S1_CH1     0xCE  /* audio channel 1 (mute off) - "linear stereo" mode */
#define TDA8425_S1_CH2     0xCF  /* audio channel 2 (mute off) - "linear stereo" mode */
#define TDA8425_S1_MU      0x20  /* mute bit */
#define TDA8425_S1_STEREO  0x18  /* stereo bits */
#define TDA8425_S1_STEREO_SPATIAL 0x18 /* spatial stereo */
#define TDA8425_S1_STEREO_LINEAR  0x08 /* linear stereo */
#define TDA8425_S1_STEREO_PSEUDO  0x10 /* pseudo stereo */
#define TDA8425_S1_STEREO_MONO    0x00 /* forced mono */
#define TDA8425_S1_ML      0x06        /* language selector */
#define TDA8425_S1_ML_SOUND_A 0x02     /* sound a */
#define TDA8425_S1_ML_SOUND_B 0x04     /* sound b */
#define TDA8425_S1_ML_STEREO  0x06     /* stereo */
#define TDA8425_S1_IS      0x01        /* channel selector */


static int tda8425_shift10(int val) { return (val >> 10) | 0xc0; }
static int tda8425_shift12(int val) { return (val >> 12) | 0xf0; }

static int tda8425_initialize(struct CHIPSTATE *chip)
{
	struct CHIPDESC *desc = chiplist + chip->type;
	int inputmap[8] = { /* tuner	*/ TDA8425_S1_CH2, /* radio  */ TDA8425_S1_CH1,
			    /* extern	*/ TDA8425_S1_CH1, /* intern */ TDA8425_S1_OFF,
			    /* off	*/ TDA8425_S1_OFF, /* on     */ TDA8425_S1_CH2};

	if (chip->c.adapter->id == (I2C_ALGO_BIT | I2C_HW_B_RIVA)) {
		memcpy (desc->inputmap, inputmap, sizeof (inputmap));
	}
	return 0;
}

static void tda8425_setmode(struct CHIPSTATE *chip, int mode)
{
	int s1 = chip->shadow.bytes[TDA8425_S1+1] & 0xe1;
	
	if (mode & VIDEO_SOUND_LANG1) {
		s1 |= TDA8425_S1_ML_SOUND_A;
		s1 |= TDA8425_S1_STEREO_PSEUDO;

	} else if (mode & VIDEO_SOUND_LANG2) {
		s1 |= TDA8425_S1_ML_SOUND_B;
		s1 |= TDA8425_S1_STEREO_PSEUDO;
		
	} else {
		s1 |= TDA8425_S1_ML_STEREO;
		
		if (mode & VIDEO_SOUND_MONO)
			s1 |= TDA8425_S1_STEREO_MONO;
		if (mode & VIDEO_SOUND_STEREO)
			s1 |= TDA8425_S1_STEREO_SPATIAL;
	}
	chip_write(chip,TDA8425_S1,s1);
}


/* ---------------------------------------------------------------------- */
/* audio chip descriptions - defines+functions for pic16c54 (PV951)       */

/* the registers of 16C54, I2C sub address. */
#define PIC16C54_REG_KEY_CODE     0x01	       /* Not use. */
#define PIC16C54_REG_MISC         0x02

/* bit definition of the RESET register, I2C data. */
#define PIC16C54_MISC_RESET_REMOTE_CTL 0x01 /* bit 0, Reset to receive the key */
                                            /*        code of remote controller */
#define PIC16C54_MISC_MTS_MAIN         0x02 /* bit 1 */
#define PIC16C54_MISC_MTS_SAP          0x04 /* bit 2 */
#define PIC16C54_MISC_MTS_BOTH         0x08 /* bit 3 */
#define PIC16C54_MISC_SND_MUTE         0x10 /* bit 4, Mute Audio(Line-in and Tuner) */
#define PIC16C54_MISC_SND_NOTMUTE      0x20 /* bit 5 */
#define PIC16C54_MISC_SWITCH_TUNER     0x40 /* bit 6	, Switch to Line-in */
#define PIC16C54_MISC_SWITCH_LINE      0x80 /* bit 7	, Switch to Tuner */

/* ---------------------------------------------------------------------- */
/* audio chip descriptions - defines+functions for TA8874Z                */

// write 1st byte
#define TA8874Z_LED_STE	0x80
#define TA8874Z_LED_BIL	0x40
#define TA8874Z_LED_EXT	0x20
#define TA8874Z_MONO_SET	0x10
#define TA8874Z_MUTE	0x08
#define TA8874Z_F_MONO	0x04
#define TA8874Z_MODE_SUB	0x02
#define TA8874Z_MODE_MAIN	0x01

// write 2nd byte
//#define TA8874Z_TI	0x80  // test mode
#define TA8874Z_SEPARATION	0x3f
#define TA8874Z_SEPARATION_DEFAULT	0x10

// read
#define TA8874Z_B1	0x80
#define TA8874Z_B0	0x40
#define TA8874Z_CHAG_FLAG	0x20

//        B1 B0
// mono    L  H
// stereo  L  L
// BIL     H  L

static int ta8874z_getmode(struct CHIPSTATE *chip)
{
	int val, mode;
	
	val = chip_read(chip);
	mode = VIDEO_SOUND_MONO;
	if (val & TA8874Z_B1){
		mode |= VIDEO_SOUND_LANG1 | VIDEO_SOUND_LANG2;
	}else if (!(val & TA8874Z_B0)){
		mode |= VIDEO_SOUND_STEREO;
	}
	//dprintk ("ta8874z_getmode(): raw chip read: 0x%02x, return: 0x%02x\n", val, mode);
	return mode;
}

static audiocmd ta8874z_stereo = { 2, {0, TA8874Z_SEPARATION_DEFAULT}};
static audiocmd ta8874z_mono = {2, { TA8874Z_MONO_SET, TA8874Z_SEPARATION_DEFAULT}};
static audiocmd ta8874z_main = {2, { 0, TA8874Z_SEPARATION_DEFAULT}};
static audiocmd ta8874z_sub = {2, { TA8874Z_MODE_SUB, TA8874Z_SEPARATION_DEFAULT}};

static void ta8874z_setmode(struct CHIPSTATE *chip, int mode)
{
	int update = 1;
	audiocmd *t = NULL;
	dprintk("ta8874z_setmode(): mode: 0x%02x\n", mode);

	switch(mode){
	case VIDEO_SOUND_MONO:
		t = &ta8874z_mono;
		break;
	case VIDEO_SOUND_STEREO:
		t = &ta8874z_stereo;
		break;
	case VIDEO_SOUND_LANG1:
		t = &ta8874z_main;
		break;
	case VIDEO_SOUND_LANG2:
		t = &ta8874z_sub;
		break;
	default:
		update = 0;
	}

	if(update)
		chip_cmd(chip, "TA8874Z", t);
}

static int ta8874z_checkit(struct CHIPSTATE *chip)
{
	int rc;
	rc = chip_read(chip);
	return ((rc & 0x1f) == 0x1f) ? 1 : 0;
}

/* ---------------------------------------------------------------------- */
/* audio chip descriptions - struct CHIPDESC                              */

/* insmod options to enable/disable individual audio chips */
int tda8425  = 1;
int tda9840  = 1;
int tda9850  = 1;
int tda9855  = 1;
int tda9873  = 1;
int tda9874a = 1;
int tea6300  = 0;  // address clash with msp34xx
int tea6420  = 1;
int pic16c54 = 1;
int ta8874z  = 0;  // address clash with tda9840

MODULE_PARM(tda8425,"i");
MODULE_PARM(tda9840,"i");
MODULE_PARM(tda9850,"i");
MODULE_PARM(tda9855,"i");
MODULE_PARM(tda9873,"i");
MODULE_PARM(tda9874a,"i");
MODULE_PARM(tea6300,"i");
MODULE_PARM(tea6420,"i");
MODULE_PARM(pic16c54,"i");
MODULE_PARM(ta8874z,"i");

static struct CHIPDESC chiplist[] = {
	{
		.name       = "tda9840",
		.id         = I2C_DRIVERID_TDA9840,
		.insmodopt  = &tda9840,
		.addr_lo    = I2C_TDA9840 >> 1,
		.addr_hi    = I2C_TDA9840 >> 1,
		.registers  = 5,

		.getmode    = tda9840_getmode,
		.setmode    = tda9840_setmode,
		.checkmode  = generic_checkmode,

	        .init       = { 2, { TDA9840_TEST, TDA9840_TEST_INT1SN
				/* ,TDA9840_SW, TDA9840_MONO */} }
	},
	{
		.name       = "tda9873h",
		.id         = I2C_DRIVERID_TDA9873,
		.checkit    = tda9873_checkit,
		.insmodopt  = &tda9873,
		.addr_lo    = I2C_TDA985x_L >> 1,
		.addr_hi    = I2C_TDA985x_H >> 1,
		.registers  = 3,
		.flags      = CHIP_HAS_INPUTSEL,

		.getmode    = tda9873_getmode,
		.setmode    = tda9873_setmode,
		.checkmode  = generic_checkmode,

		.init       = { 4, { TDA9873_SW, 0xa4, 0x06, 0x03 } },
		.inputreg   = TDA9873_SW,
		.inputmute  = TDA9873_MUTE | TDA9873_AUTOMUTE,
		.inputmap   = {0xa0, 0xa2, 0xa0, 0xa0, 0xc0},
		.inputmask  = TDA9873_INP_MASK|TDA9873_MUTE|TDA9873_AUTOMUTE,
		
	},
	{
		.name       = "tda9874h/a",
		.id         = I2C_DRIVERID_TDA9874,