tvaudio.c

内核linux2.4.20,可跟rtlinux3.2打补丁 组成实时linux系统,编译内核

                              * interesting ones are defined */
#define TDA9855_EXT	1<<2 /* Selects inputs LIR and LIL.  Pins 41 & 12 */
#define TDA9855_INT	0    /* Selects inputs LOR and LOL.  (internal) */

/* Unique to TDA9850:  */
/* lower 4 bits contol SAP noise threshold, over which SAP turns off
 * set to values of 0x00 through 0x0f for SAP1 through SAP16 */


/* 0x06 - C6 - Control 2 in TDA9855, Control 3 in TDA9850 */
/* Common to TDA9855 and TDA9850: */
#define TDA985x_SAP	3<<6 /* Selects SAP output, mute if not received */
#define TDA985x_STEREO	1<<6 /* Selects Stereo ouput, mono if not received */
#define TDA985x_MONO	0    /* Forces Mono output */
#define TDA985x_LMU	1<<3 /* Mute (LOR/LOL for 9855, OUTL/OUTR for 9850) */

/* Unique to TDA9855: */
#define TDA9855_TZCM	1<<5 /* If set, don't mute till zero crossing */
#define TDA9855_VZCM	1<<4 /* If set, don't change volume till zero crossing*/
#define TDA9855_LINEAR	0    /* Linear Stereo */
#define TDA9855_PSEUDO	1    /* Pseudo Stereo */
#define TDA9855_SPAT_30	2    /* Spatial Stereo, 30% anti-phase crosstalk */
#define TDA9855_SPAT_50	3    /* Spatial Stereo, 52% anti-phase crosstalk */
#define TDA9855_E_MONO	7    /* Forced mono - mono select elseware, so useless*/

/* 0x07 - C7 - Control 3 in TDA9855, Control 4 in TDA9850 */
/* Common to both TDA9855 and TDA9850: */
/* lower 4 bits control input gain from -3.5dB (0x0) to 4dB (0xF)
 * in .5dB steps -  0dB is 0x7 */

/* 0x08, 0x09 - A1 and A2 (read/write) */
/* Common to both TDA9855 and TDA9850: */
/* lower 5 bites are wideband and spectral expander alignment
 * from 0x00 to 0x1f - nominal at 0x0f and 0x10 (read/write) */
#define TDA985x_STP	1<<5 /* Stereo Pilot/detect (read-only) */
#define TDA985x_SAPP	1<<6 /* SAP Pilot/detect (read-only) */
#define TDA985x_STS	1<<7 /* Stereo trigger 1= <35mV 0= <30mV (write-only)*/

/* 0x0a - A3 */
/* Common to both TDA9855 and TDA9850: */
/* lower 3 bits control timing current for alignment: -30% (0x0), -20% (0x1),
 * -10% (0x2), nominal (0x3), +10% (0x6), +20% (0x5), +30% (0x4) */
#define TDA985x_ADJ	1<<7 /* Stereo adjust on/off (wideband and spectral */

int tda9855_volume(int val) { return val/0x2e8+0x27; }
int tda9855_bass(int val)   { return val/0xccc+0x06; }
int tda9855_treble(int val) { return (val/0x1c71+0x3)<<1; }

int  tda985x_getmode(struct CHIPSTATE *chip)
{
	int mode;

	mode = ((TDA985x_STP | TDA985x_SAPP) & 
		chip_read(chip)) >> 4;
	/* Add mono mode regardless of SAP and stereo */
	/* Allows forced mono */
	return mode | VIDEO_SOUND_MONO;
}

void tda985x_setmode(struct CHIPSTATE *chip, int mode)
{
	int update = 1;
	int c6 = chip->shadow.bytes[TDA985x_C6+1] & 0x3f;
	
	switch (mode) {
	case VIDEO_SOUND_MONO:
		c6 |= TDA985x_MONO;
		break;
	case VIDEO_SOUND_STEREO:
		c6 |= TDA985x_STEREO;
		break;
	case VIDEO_SOUND_LANG1:
		c6 |= TDA985x_SAP;
		break;
	default:
		update = 0;
	}
	if (update)
		chip_write(chip,TDA985x_C6,c6);
}


/* ---------------------------------------------------------------------- */
/* audio chip descriptions - defines+functions for tda9873h               */

/* Subaddresses for TDA9873H */

#define TDA9873_SW	0x00 /* Switching                    */
#define TDA9873_AD	0x01 /* Adjust                       */
#define TDA9873_PT	0x02 /* Port                         */

/* Subaddress 0x00: Switching Data 
 * B7..B0:
 *
 * B1, B0: Input source selection
 *  0,  0  internal
 *  1,  0  external stereo
 *  0,  1  external mono
 */
#define TDA9873_INP_MASK    3
#define TDA9873_INTERNAL    0
#define TDA9873_EXT_STEREO  2
#define TDA9873_EXT_MONO    1

/*    B3, B2: output signal select
 * B4    : transmission mode 
 *  0, 0, 1   Mono
 *  1, 0, 0   Stereo
 *  1, 1, 1   Stereo (reversed channel)    
 *  0, 0, 0   Dual AB
 *  0, 0, 1   Dual AA
 *  0, 1, 0   Dual BB
 *  0, 1, 1   Dual BA
 */

#define TDA9873_TR_MASK     (7 << 2)
#define TDA9873_TR_MONO     4
#define TDA9873_TR_STEREO   1 << 4
#define TDA9873_TR_REVERSE  (1 << 3) & (1 << 2)
#define TDA9873_TR_DUALA    1 << 2
#define TDA9873_TR_DUALB    1 << 3

/* output level controls
 * B5:  output level switch (0 = reduced gain, 1 = normal gain)
 * B6:  mute                (1 = muted)
 * B7:  auto-mute           (1 = auto-mute enabled)
 */

#define TDA9873_GAIN_NORMAL 1 << 5
#define TDA9873_MUTE        1 << 6
#define TDA9873_AUTOMUTE    1 << 7

/* Subaddress 0x01:  Adjust/standard */

/* Lower 4 bits (C3..C0) control stereo adjustment on R channel (-0.6 - +0.7 dB)
 * Recommended value is +0 dB
 */

#define	TDA9873_STEREO_ADJ	0x06 /* 0dB gain */

/* Bits C6..C4 control FM stantard  
 * C6, C5, C4
 *  0,  0,  0   B/G (PAL FM)
 *  0,  0,  1   M
 *  0,  1,  0   D/K(1)
 *  0,  1,  1   D/K(2)
 *  1,  0,  0   D/K(3)
 *  1,  0,  1   I
 */
#define TDA9873_BG		0
#define TDA9873_M       1
#define TDA9873_DK1     2
#define TDA9873_DK2     3
#define TDA9873_DK3     4
#define TDA9873_I       5

/* C7 controls identification response time (1=fast/0=normal)
 */
#define TDA9873_IDR_NORM 0
#define TDA9873_IDR_FAST 1 << 7


/* Subaddress 0x02: Port data */ 

/* E1, E0   free programmable ports P1/P2
    0,  0   both ports low
    0,  1   P1 high
    1,  0   P2 high
    1,  1   both ports high
*/

#define TDA9873_PORTS    3

/* E2: test port */
#define TDA9873_TST_PORT 1 << 2

/* E5..E3 control mono output channel (together with transmission mode bit B4)
 *
 * E5 E4 E3 B4     OUTM
 *  0  0  0  0     mono
 *  0  0  1  0     DUAL B
 *  0  1  0  1     mono (from stereo decoder)
 */
#define TDA9873_MOUT_MONO   0
#define TDA9873_MOUT_FMONO  0
#define TDA9873_MOUT_DUALA  0 
#define TDA9873_MOUT_DUALB  1 << 3 
#define TDA9873_MOUT_ST     1 << 4 
#define TDA9873_MOUT_EXTM   (1 << 4 ) & (1 << 3)
#define TDA9873_MOUT_EXTL   1 << 5 
#define TDA9873_MOUT_EXTR   (1 << 5 ) & (1 << 3)
#define TDA9873_MOUT_EXTLR  (1 << 5 ) & (1 << 4)
#define TDA9873_MOUT_MUTE   (1 << 5 ) & (1 << 4) & (1 << 3)

/* Status bits: (chip read) */
#define TDA9873_PONR        0 /* Power-on reset detected if = 1 */
#define TDA9873_STEREO      2 /* Stereo sound is identified     */
#define TDA9873_DUAL        4 /* Dual sound is identified       */

int tda9873_getmode(struct CHIPSTATE *chip)
{
	int val,mode;

	val = chip_read(chip);
	mode = VIDEO_SOUND_MONO;
	if (val & TDA9873_STEREO)
		mode |= VIDEO_SOUND_STEREO;
	if (val & TDA9873_DUAL)
		mode |= VIDEO_SOUND_LANG1 | VIDEO_SOUND_LANG2;
	dprintk ("tda9873_getmode(): raw chip read: %d, return: %d\n",
		 val, mode);
	return mode;
}

void tda9873_setmode(struct CHIPSTATE *chip, int mode)
{
	int sw_data  = chip->shadow.bytes[TDA9873_SW+1] & ~ TDA9873_TR_MASK;
	/*	int adj_data = chip->shadow.bytes[TDA9873_AD+1] ; */

	if ((sw_data & TDA9873_INP_MASK) != TDA9873_INTERNAL) {
		dprintk("tda9873_setmode(): external input\n");
		return;
	}
	
	dprintk("tda9873_setmode(): chip->shadow.bytes[%d] = %d\n", TDA9873_SW+1, chip->shadow.bytes[TDA9873_SW+1]);
	dprintk("tda9873_setmode(): sw_data  = %d\n", sw_data);

	switch (mode) {
	case VIDEO_SOUND_MONO:
		sw_data |= TDA9873_TR_MONO;   
		break;
	case VIDEO_SOUND_STEREO:
		sw_data |= TDA9873_TR_STEREO;
		break;
	case VIDEO_SOUND_LANG1:
		sw_data |= TDA9873_TR_DUALA;
		break;
	case VIDEO_SOUND_LANG2:
		sw_data |= TDA9873_TR_DUALB;
		break;
	default:
		chip->mode = 0;
		return;
	}

	chip_write(chip, TDA9873_SW, sw_data);
	dprintk("tda9873_setmode(): req. mode %d; chip_write: %d\n",
		mode, sw_data);
}

int tda9873_checkit(struct CHIPSTATE *chip)
{
	int rc;

	if (-1 == (rc = chip_read2(chip,254)))
		return 0;
	return (rc & ~0x1f) == 0x80;
}


/* ---------------------------------------------------------------------- */
/* audio chip description - defines+functions for tda9874a                */
/* Dariusz Kowalewski <[e-mail]>                                 */

/* Subaddresses for TDA9874A (slave rx) */
#define TDA9874A_AGCGR		0x00	/* AGC gain */
#define TDA9874A_GCONR		0x01	/* general config */
#define TDA9874A_MSR		0x02	/* monitor select */
#define TDA9874A_C1FRA		0x03	/* carrier 1 freq. */
#define TDA9874A_C1FRB		0x04	/* carrier 1 freq. */
#define TDA9874A_C1FRC		0x05	/* carrier 1 freq. */
#define TDA9874A_C2FRA		0x06	/* carrier 2 freq. */
#define TDA9874A_C2FRB		0x07	/* carrier 2 freq. */
#define TDA9874A_C2FRC		0x08	/* carrier 2 freq. */
#define TDA9874A_DCR		0x09	/* demodulator config */
#define TDA9874A_FMER		0x0a	/* FM de-emphasis */
#define TDA9874A_FMMR		0x0b	/* FM dematrix */
#define TDA9874A_C1OLAR		0x0c	/* ch.1 output level adj. */
#define TDA9874A_C2OLAR		0x0d	/* ch.2 output level adj. */
#define TDA9874A_NCONR		0x0e	/* NICAM config */
#define TDA9874A_NOLAR		0x0f	/* NICAM output level adj. */
#define TDA9874A_NLELR		0x10	/* NICAM lower error limit */
#define TDA9874A_NUELR		0x11	/* NICAM upper error limit */
#define TDA9874A_AMCONR		0x12	/* audio mute control */
#define TDA9874A_SDACOSR	0x13	/* stereo DAC output select */
#define TDA9874A_AOSR		0x14	/* analog output select */
#define TDA9874A_DAICONR	0x15	/* digital audio interface config */
#define TDA9874A_I2SOSR		0x16	/* I2S-bus output select */
#define TDA9874A_I2SOLAR	0x17	/* I2S-bus output level adj. */
#define TDA9874A_MDACOSR	0x18	/* mono DAC output select */
#define TDA9874A_ESP		0xFF	/* easy standard progr. */

/* Subaddresses for TDA9874A (slave tx) */
#define TDA9874A_DSR		0x00	/* device status */
#define TDA9874A_NSR		0x01	/* NICAM status */
#define TDA9874A_NECR		0x02	/* NICAM error count */
#define TDA9874A_DR1		0x03	/* add. data LSB */
#define TDA9874A_DR2		0x04	/* add. data MSB */
#define TDA9874A_LLRA		0x05	/* monitor level read-out LSB */
#define TDA9874A_LLRB		0x06	/* monitor level read-out MSB */
#define TDA9874A_SIFLR		0x07	/* SIF level */
#define TDA9874A_TR2		252	/* test reg. 2 */
#define TDA9874A_TR1		253	/* test reg. 1 */
#define TDA9874A_DIC		254	/* device id. code */
#define TDA9874A_SIC		255	/* software id. code */


static int tda9874a_mode = 1;		/* 0: A2, 1: NICAM */
static int tda9874a_GCONR = 0xc0;	/* default config. input pin: SIFSEL=0 */
static int tda9874a_ESP = 0x07;		/* default standard: NICAM D/K */

/* insmod options for tda9874a */
static int tda9874a_SIF = -1;
static int tda9874a_STD = -1;
MODULE_PARM(tda9874a_SIF,"i");
MODULE_PARM(tda9874a_STD,"i");


static int tda9874a_setup(struct CHIPSTATE *chip)
{
	chip_write(chip, TDA9874A_AGCGR, 0x00); /* 0 dB */
	chip_write(chip, TDA9874A_GCONR, tda9874a_GCONR);
	chip_write(chip, TDA9874A_MSR, (tda9874a_mode) ? 0x03:0x02);
	chip_write(chip, TDA9874A_FMMR, 0x80);
	chip_write(chip, TDA9874A_C1OLAR, 0x00); /* 0 dB */
	chip_write(chip, TDA9874A_C2OLAR, 0x00); /* 0 dB */
	chip_write(chip, TDA9874A_NCONR, 0x00); /* not 0x04 as doc. table 10 says! */
	chip_write(chip, TDA9874A_NOLAR, 0x00); /* 0 dB */
	chip_write(chip, TDA9874A_AMCONR, 0xf9);
	chip_write(chip, TDA9874A_SDACOSR, (tda9874a_mode) ? 0x81:0x80); /* 0x81 */
	chip_write(chip, TDA9874A_AOSR, 0x80);
	chip_write(chip, TDA9874A_MDACOSR, (tda9874a_mode) ? 0x82:0x80);
	chip_write(chip, TDA9874A_ESP, tda9874a_ESP);

	return 1;
}

int tda9874a_getmode(struct CHIPSTATE *chip)
{
	int dsr,nsr,mode;

	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(tda9874a_mode) {
		/* check also DSR.RSSF and DSR.AMSTAT bits? */
		if(nsr & 0x02) /* NSR.S/MB */
			mode |= VIDEO_SOUND_STEREO;
		if(nsr & 0x01) /* NSR.D/SB */ 
			mode |= VIDEO_SOUND_LANG1 | VIDEO_SOUND_LANG2;
	} else {
		if(dsr & 0x02) /* DSR.IDSTE */
			mode |= VIDEO_SOUND_STEREO;
		if(dsr & 0x04) /* DSR.IDDUA */
			mode |= VIDEO_SOUND_LANG1 | VIDEO_SOUND_LANG2;
	}

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

void tda9874a_setmode(struct CHIPSTATE *chip, int mode)
{
	int aosr=0x80,mdacosr=0x82;

	/* note: TDA9874A has auto-select function for audio output */
	switch(mode) {
	case VIDEO_SOUND_MONO:
	case VIDEO_SOUND_STEREO:
		break;
	case VIDEO_SOUND_LANG1:
		aosr = 0x80; /* dual A/A */
		mdacosr = (tda9874a_mode) ? 0x82:0x80;
		break;
	case VIDEO_SOUND_LANG2:
		aosr = 0xa0; /* 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);
}

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);

	return((dic & 0xff) == 0x11);
}

int tda9874a_initialize(struct CHIPSTATE *chip)
{
	if(tda9874a_SIF != -1) {
		if(tda9874a_SIF == 1)
			tda9874a_GCONR = 0xc0;	/* sound IF input 1 */
		else if(tda9874a_SIF == 2)
			tda9874a_GCONR = 0xc1;	/* sound IF input 2 */
		else
			printk(KERN_WARNING "tda9874a: SIF parameter must be 1 or 2.\n");
	}

	if(tda9874a_STD != -1) {
		if((tda9874a_STD >= 0)&&(tda9874a_STD <= 8)) {
			tda9874a_ESP = tda9874a_STD;
			tda9874a_mode = (tda9874a_STD < 5) ? 0 : 1;
		} else {
			printk(KERN_WARNING "tda9874a: STD parameter must be between 0 and 8.\n");
		}
	}

	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 */

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