V4L/DVB (11276): tvaudio: add tda9875 support.

This change allows bttv to use tvaudio for this device. Since this device
has the same i2c address as the tda9874 we need to support both in the same
tvaudio driver. This makes it possible for tvaudio to detect which chip is
used. Originally the tda9875 was only available in the dedicated tda9875
driver, but that makes life very hard for bttv since loading tvaudio might
misdetect a tda9875 as a tda9874.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/tvaudio.c

@@ -1047,6 +1047,116 @@ static int tda9874a_initialize(struct CHIPSTATE *chip)
 	return 0;
 }
 
+/* ---------------------------------------------------------------------- */
+/* audio chip description - defines+functions for tda9875                 */
+/* The TDA9875 is made by Philips Semiconductor
+ * http://www.semiconductors.philips.com
+ * TDA9875: I2C-bus controlled DSP audio processor, FM demodulator
+ *
+ */
+
+/* subaddresses for TDA9875 */
+#define TDA9875_MUT         0x12  /*General mute  (value --> 0b11001100*/
+#define TDA9875_CFG         0x01  /* Config register (value --> 0b00000000 */
+#define TDA9875_DACOS       0x13  /*DAC i/o select (ADC) 0b0000100*/
+#define TDA9875_LOSR        0x16  /*Line output select regirter 0b0100 0001*/
+
+#define TDA9875_CH1V        0x0c  /*Channel 1 volume (mute)*/
+#define TDA9875_CH2V        0x0d  /*Channel 2 volume (mute)*/
+#define TDA9875_SC1         0x14  /*SCART 1 in (mono)*/
+#define TDA9875_SC2         0x15  /*SCART 2 in (mono)*/
+
+#define TDA9875_ADCIS       0x17  /*ADC input select (mono) 0b0110 000*/
+#define TDA9875_AER         0x19  /*Audio effect (AVL+Pseudo) 0b0000 0110*/
+#define TDA9875_MCS         0x18  /*Main channel select (DAC) 0b0000100*/
+#define TDA9875_MVL         0x1a  /* Main volume gauche */
+#define TDA9875_MVR         0x1b  /* Main volume droite */
+#define TDA9875_MBA         0x1d  /* Main Basse */
+#define TDA9875_MTR         0x1e  /* Main treble */
+#define TDA9875_ACS         0x1f  /* Auxilary channel select (FM) 0b0000000*/
+#define TDA9875_AVL         0x20  /* Auxilary volume gauche */
+#define TDA9875_AVR         0x21  /* Auxilary volume droite */
+#define TDA9875_ABA         0x22  /* Auxilary Basse */
+#define TDA9875_ATR         0x23  /* Auxilary treble */
+
+#define TDA9875_MSR         0x02  /* Monitor select register */
+#define TDA9875_C1MSB       0x03  /* Carrier 1 (FM) frequency register MSB */
+#define TDA9875_C1MIB       0x04  /* Carrier 1 (FM) frequency register (16-8]b */
+#define TDA9875_C1LSB       0x05  /* Carrier 1 (FM) frequency register LSB */
+#define TDA9875_C2MSB       0x06  /* Carrier 2 (nicam) frequency register MSB */
+#define TDA9875_C2MIB       0x07  /* Carrier 2 (nicam) frequency register (16-8]b */
+#define TDA9875_C2LSB       0x08  /* Carrier 2 (nicam) frequency register LSB */
+#define TDA9875_DCR         0x09  /* Demodulateur configuration regirter*/
+#define TDA9875_DEEM        0x0a  /* FM de-emphasis regirter*/
+#define TDA9875_FMAT        0x0b  /* FM Matrix regirter*/
+
+/* values */
+#define TDA9875_MUTE_ON	    0xff /* general mute */
+#define TDA9875_MUTE_OFF    0xcc /* general no mute */
+
+static int tda9875_initialize(struct CHIPSTATE *chip)
+{
+	chip_write(chip, TDA9875_CFG, 0xd0); /*reg de config 0 (reset)*/
+	chip_write(chip, TDA9875_MSR, 0x03);    /* Monitor 0b00000XXX*/
+	chip_write(chip, TDA9875_C1MSB, 0x00);  /*Car1(FM) MSB XMHz*/
+	chip_write(chip, TDA9875_C1MIB, 0x00);  /*Car1(FM) MIB XMHz*/
+	chip_write(chip, TDA9875_C1LSB, 0x00);  /*Car1(FM) LSB XMHz*/
+	chip_write(chip, TDA9875_C2MSB, 0x00);  /*Car2(NICAM) MSB XMHz*/
+	chip_write(chip, TDA9875_C2MIB, 0x00);  /*Car2(NICAM) MIB XMHz*/
+	chip_write(chip, TDA9875_C2LSB, 0x00);  /*Car2(NICAM) LSB XMHz*/
+	chip_write(chip, TDA9875_DCR, 0x00);    /*Demod config 0x00*/
+	chip_write(chip, TDA9875_DEEM, 0x44);   /*DE-Emph 0b0100 0100*/
+	chip_write(chip, TDA9875_FMAT, 0x00);   /*FM Matrix reg 0x00*/
+	chip_write(chip, TDA9875_SC1, 0x00);    /* SCART 1 (SC1)*/
+	chip_write(chip, TDA9875_SC2, 0x01);    /* SCART 2 (sc2)*/
+
+	chip_write(chip, TDA9875_CH1V, 0x10);  /* Channel volume 1 mute*/
+	chip_write(chip, TDA9875_CH2V, 0x10);  /* Channel volume 2 mute */
+	chip_write(chip, TDA9875_DACOS, 0x02); /* sig DAC i/o(in:nicam)*/
+	chip_write(chip, TDA9875_ADCIS, 0x6f); /* sig ADC input(in:mono)*/
+	chip_write(chip, TDA9875_LOSR, 0x00);  /* line out (in:mono)*/
+	chip_write(chip, TDA9875_AER, 0x00);   /*06 Effect (AVL+PSEUDO) */
+	chip_write(chip, TDA9875_MCS, 0x44);   /* Main ch select (DAC) */
+	chip_write(chip, TDA9875_MVL, 0x03);   /* Vol Main left 10dB */
+	chip_write(chip, TDA9875_MVR, 0x03);   /* Vol Main right 10dB*/
+	chip_write(chip, TDA9875_MBA, 0x00);   /* Main Bass Main 0dB*/
+	chip_write(chip, TDA9875_MTR, 0x00);   /* Main Treble Main 0dB*/
+	chip_write(chip, TDA9875_ACS, 0x44);   /* Aux chan select (dac)*/
+	chip_write(chip, TDA9875_AVL, 0x00);   /* Vol Aux left 0dB*/
+	chip_write(chip, TDA9875_AVR, 0x00);   /* Vol Aux right 0dB*/
+	chip_write(chip, TDA9875_ABA, 0x00);   /* Aux Bass Main 0dB*/
+	chip_write(chip, TDA9875_ATR, 0x00);   /* Aux Aigus Main 0dB*/
+
+	chip_write(chip, TDA9875_MUT, 0xcc);   /* General mute  */
+	return 0;
+}
+
+static int tda9875_volume(int val) { return (unsigned char)(val / 602 - 84); }
+static int tda9875_bass(int val) { return (unsigned char)(max(-12, val / 2115 - 15)); }
+static int tda9875_treble(int val) { return (unsigned char)(val / 2622 - 12); }
+
+/* ----------------------------------------------------------------------- */
+
+
+/* *********************** *
+ * i2c interface functions *
+ * *********************** */
+
+static int tda9875_checkit(struct CHIPSTATE *chip)
+{
+	struct v4l2_subdev *sd = &chip->sd;
+	int dic, rev;
+
+	dic = chip_read2(chip, 254);
+	rev = chip_read2(chip, 255);
+
+	if (dic == 0 || dic == 2) { /* tda9875 and tda9875A */
+		v4l2_info(sd, "found tda9875%s rev. %d.\n",
+			dic == 0 ? "" : "A", rev);
+		return 1;
+	}
+	return 0;
+}
 
 /* ---------------------------------------------------------------------- */
 /* audio chip descriptions - defines+functions for tea6420                */
@@ -1280,6 +1390,7 @@ static int tda9850  = 1;
 static int tda9855  = 1;
 static int tda9873  = 1;
 static int tda9874a = 1;
+static int tda9875  = 1;
 static int tea6300;	/* default 0 - address clash with msp34xx */
 static int tea6320;	/* default 0 - address clash with msp34xx */
 static int tea6420  = 1;
@@ -1292,6 +1403,7 @@ module_param(tda9850, int, 0444);
 module_param(tda9855, int, 0444);
 module_param(tda9873, int, 0444);
 module_param(tda9874a, int, 0444);
+module_param(tda9875, int, 0444);
 module_param(tea6300, int, 0444);
 module_param(tea6320, int, 0444);
 module_param(tea6420, int, 0444);
@@ -1348,6 +1460,26 @@ static struct CHIPDESC chiplist[] = {
 		.getmode    = tda9874a_getmode,
 		.setmode    = tda9874a_setmode,
 	},
+	{
+		.name       = "tda9875",
+		.insmodopt  = &tda9875,
+		.addr_lo    = I2C_ADDR_TDA9875 >> 1,
+		.addr_hi    = I2C_ADDR_TDA9875 >> 1,
+		.flags      = CHIP_HAS_VOLUME | CHIP_HAS_BASSTREBLE,
+
+		/* callbacks */
+		.initialize = tda9875_initialize,
+		.checkit    = tda9875_checkit,
+		.volfunc    = tda9875_volume,
+		.bassfunc   = tda9875_bass,
+		.treblefunc = tda9875_treble,
+		.leftreg    = TDA9875_MVL,
+		.rightreg   = TDA9875_MVR,
+		.bassreg    = TDA9875_MBA,
+		.treblereg  = TDA9875_MTR,
+		.leftinit   = 58880,
+		.rightinit  = 58880,
+	},
 	{
 		.name       = "tda9850",
 		.insmodopt  = &tda9850,