/* * For Philips TEA5767 FM Chip used on some TV Cards like Prolink Pixelview * I2C address is allways 0xC0. * * * Copyright (c) 2005 Mauro Carvalho Chehab (mchehab@brturbo.com.br) * This code is placed under the terms of the GNU General Public License * * tea5767 autodetection thanks to Torsten Seeboth and Atsushi Nakagawa * from their contributions on DScaler. */#include <linux/i2c.h>#include <linux/videodev.h>#include <linux/delay.h>#include <media/tuner.h>#define PREFIX "TEA5767 "/* from tuner-core.c */extern int tuner_debug;/*****************************************************************************//****************************** * Write mode register values * ******************************//* First register */#define TEA5767_MUTE		0x80	/* Mutes output */#define TEA5767_SEARCH		0x40	/* Activates station search *//* Bits 0-5 for divider MSB *//* Second register *//* Bits 0-7 for divider LSB *//* Third register *//* Station search from botton to up */#define TEA5767_SEARCH_UP	0x80/* Searches with ADC output = 10 */#define TEA5767_SRCH_HIGH_LVL	0x60/* Searches with ADC output = 10 */#define TEA5767_SRCH_MID_LVL	0x40/* Searches with ADC output = 5 */#define TEA5767_SRCH_LOW_LVL	0x20/* if on, div=4*(Frf+Fif)/Fref otherwise, div=4*(Frf-Fif)/Freq) */#define TEA5767_HIGH_LO_INJECT	0x10/* Disable stereo */#define TEA5767_MONO		0x08/* Disable right channel and turns to mono */#define TEA5767_MUTE_RIGHT	0x04/* Disable left channel and turns to mono */#define TEA5767_MUTE_LEFT	0x02#define TEA5767_PORT1_HIGH	0x01/* Fourth register */#define TEA5767_PORT2_HIGH	0x80/* Chips stops working. Only I2C bus remains on */#define TEA5767_STDBY		0x40/* Japan freq (76-108 MHz. If disabled, 87.5-108 MHz */#define TEA5767_JAPAN_BAND	0x20/* Unselected means 32.768 KHz freq as reference. Otherwise Xtal at 13 MHz */#define TEA5767_XTAL_32768	0x10/* Cuts weak signals */#define TEA5767_SOFT_MUTE	0x08/* Activates high cut control */#define TEA5767_HIGH_CUT_CTRL	0x04/* Activates stereo noise control */#define TEA5767_ST_NOISE_CTL	0x02/* If activate PORT 1 indicates SEARCH or else it is used as PORT1 */#define TEA5767_SRCH_IND	0x01/* Fifth register *//* By activating, it will use Xtal at 13 MHz as reference for divider */#define TEA5767_PLLREF_ENABLE	0x80/* By activating, deemphasis=50, or else, deemphasis of 50us */#define TEA5767_DEEMPH_75	0X40/***************************** * Read mode register values * *****************************//* First register */#define TEA5767_READY_FLAG_MASK	0x80#define TEA5767_BAND_LIMIT_MASK	0X40/* Bits 0-5 for divider MSB after search or preset *//* Second register *//* Bits 0-7 for divider LSB after search or preset *//* Third register */#define TEA5767_STEREO_MASK	0x80#define TEA5767_IF_CNTR_MASK	0x7f/* Fourth register */#define TEA5767_ADC_LEVEL_MASK	0xf0/* should be 0 */#define TEA5767_CHIP_ID_MASK	0x0f/* Fifth register *//* Reserved for future extensions */#define TEA5767_RESERVED_MASK	0xffenum tea5767_xtal_freq {	TEA5767_LOW_LO_32768    = 0,	TEA5767_HIGH_LO_32768   = 1,	TEA5767_LOW_LO_13MHz    = 2,	TEA5767_HIGH_LO_13MHz   = 3,};/*****************************************************************************/static void set_tv_freq(struct i2c_client *c, unsigned int freq){	struct tuner *t = i2c_get_clientdata(c);	tuner_warn("This tuner doesn't support TV freq.\n");}static void tea5767_status_dump(unsigned char *buffer){	unsigned int div, frq;	if (TEA5767_READY_FLAG_MASK & buffer[0])		printk(PREFIX "Ready Flag ON\n");	else		printk(PREFIX "Ready Flag OFF\n");	if (TEA5767_BAND_LIMIT_MASK & buffer[0])		printk(PREFIX "Tuner at band limit\n");	else		printk(PREFIX "Tuner not at band limit\n");	div = ((buffer[0] & 0x3f) << 8) | buffer[1];	switch (TEA5767_HIGH_LO_32768) {	case TEA5767_HIGH_LO_13MHz:		frq = (div * 50000 - 700000 - 225000) / 4;	/* Freq in KHz */		break;	case TEA5767_LOW_LO_13MHz:		frq = (div * 50000 + 700000 + 225000) / 4;	/* Freq in KHz */		break;	case TEA5767_LOW_LO_32768:		frq = (div * 32768 + 700000 + 225000) / 4;	/* Freq in KHz */		break;	case TEA5767_HIGH_LO_32768:	default:		frq = (div * 32768 - 700000 - 225000) / 4;	/* Freq in KHz */		break;	}	buffer[0] = (div >> 8) & 0x3f;	buffer[1] = div & 0xff;	printk(PREFIX "Frequency %d.%03d KHz (divider = 0x%04x)\n",	       frq / 1000, frq % 1000, div);	if (TEA5767_STEREO_MASK & buffer[2])		printk(PREFIX "Stereo\n");	else		printk(PREFIX "Mono\n");	printk(PREFIX "IF Counter = %d\n", buffer[2] & TEA5767_IF_CNTR_MASK);	printk(PREFIX "ADC Level = %d\n",	       (buffer[3] & TEA5767_ADC_LEVEL_MASK) >> 4);	printk(PREFIX "Chip ID = %d\n", (buffer[3] & TEA5767_CHIP_ID_MASK));	printk(PREFIX "Reserved = 0x%02x\n",	       (buffer[4] & TEA5767_RESERVED_MASK));}/* Freq should be specifyed at 62.5 Hz */static void set_radio_freq(struct i2c_client *c, unsigned int frq){	struct tuner *t = i2c_get_clientdata(c);	unsigned char buffer[5];	unsigned div;	int rc;	tuner_dbg (PREFIX "radio freq = %d.%03d MHz\n", frq/16000,(frq/16)%1000);	/* Rounds freq to next decimal value - for 62.5 KHz step */	/* frq = 20*(frq/16)+radio_frq[frq%16]; */	buffer[2] = TEA5767_PORT1_HIGH;	buffer[3] = TEA5767_PORT2_HIGH | TEA5767_HIGH_CUT_CTRL |		    TEA5767_ST_NOISE_CTL | TEA5767_JAPAN_BAND;	buffer[4] = 0;	if (t->audmode == V4L2_TUNER_MODE_MONO) {		tuner_dbg("TEA5767 set to mono\n");		buffer[2] |= TEA5767_MONO;	} else {		tuner_dbg("TEA5767 set to stereo\n");	}	/* Should be replaced */	switch (TEA5767_HIGH_LO_32768) {	case TEA5767_HIGH_LO_13MHz:		tuner_dbg ("TEA5767 radio HIGH LO inject xtal @ 13 MHz\n");		buffer[2] |= TEA5767_HIGH_LO_INJECT;		buffer[4] |= TEA5767_PLLREF_ENABLE;		div = (frq * (4000 / 16) + 700000 + 225000 + 25000) / 50000;		break;	case TEA5767_LOW_LO_13MHz:		tuner_dbg ("TEA5767 radio LOW LO inject xtal @ 13 MHz\n");		buffer[4] |= TEA5767_PLLREF_ENABLE;		div = (frq * (4000 / 16) - 700000 - 225000 + 25000) / 50000;		break;	case TEA5767_LOW_LO_32768:		tuner_dbg ("TEA5767 radio LOW LO inject xtal @ 32,768 MHz\n");		buffer[3] |= TEA5767_XTAL_32768;		/* const 700=4000*175 Khz - to adjust freq to right value */		div = ((frq * (4000 / 16) - 700000 - 225000) + 16384) >> 15;		break;	case TEA5767_HIGH_LO_32768:	default:		tuner_dbg ("TEA5767 radio HIGH LO inject xtal @ 32,768 MHz\n");		buffer[2] |= TEA5767_HIGH_LO_INJECT;		buffer[3] |= TEA5767_XTAL_32768;		div = ((frq * (4000 / 16) + 700000 + 225000) + 16384) >> 15;		break;	}	buffer[0] = (div >> 8) & 0x3f;	buffer[1] = div & 0xff;	if (5 != (rc = i2c_master_send(c, buffer, 5)))		tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);	if (tuner_debug) {		if (5 != (rc = i2c_master_recv(c, buffer, 5)))			tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);		else			tea5767_status_dump(buffer);	}}static int tea5767_signal(struct i2c_client *c){	unsigned char buffer[5];	int rc;	struct tuner *t = i2c_get_clientdata(c);	memset(buffer, 0, sizeof(buffer));	if (5 != (rc = i2c_master_recv(c, buffer, 5)))		tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);	return ((buffer[3] & TEA5767_ADC_LEVEL_MASK) << 8);}static int tea5767_stereo(struct i2c_client *c){	unsigned char buffer[5];	int rc;	struct tuner *t = i2c_get_clientdata(c);	memset(buffer, 0, sizeof(buffer));	if (5 != (rc = i2c_master_recv(c, buffer, 5)))		tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);	rc = buffer[2] & TEA5767_STEREO_MASK;	tuner_dbg("TEA5767 radio ST GET = %02x\n", rc);	return ((buffer[2] & TEA5767_STEREO_MASK) ? V4L2_TUNER_SUB_STEREO : 0);}static void tea5767_standby(struct i2c_client *c){	unsigned char buffer[5];	struct tuner *t = i2c_get_clientdata(c);	unsigned div, rc;	div = (87500 * 4 + 700 + 225 + 25) / 50; /* Set frequency to 87.5 MHz */	buffer[0] = (div >> 8) & 0x3f;	buffer[1] = div & 0xff;	buffer[2] = TEA5767_PORT1_HIGH;	buffer[3] = TEA5767_PORT2_HIGH | TEA5767_HIGH_CUT_CTRL |		    TEA5767_ST_NOISE_CTL | TEA5767_JAPAN_BAND | TEA5767_STDBY;	buffer[4] = 0;	if (5 != (rc = i2c_master_send(c, buffer, 5)))		tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);}int tea5767_autodetection(struct i2c_client *c){	unsigned char buffer[7] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };	int rc;	struct tuner *t = i2c_get_clientdata(c);	if ((rc = i2c_master_recv(c, buffer, 7))< 5) {		tuner_warn("It is not a TEA5767. Received %i bytes.\n", rc);		return EINVAL;	}	/* If all bytes are the same then it's a TV tuner and not a tea5767 */	if (buffer[0] == buffer[1] && buffer[0] == buffer[2] &&	    buffer[0] == buffer[3] && buffer[0] == buffer[4]) {		tuner_warn("All bytes are equal. It is not a TEA5767\n");		return EINVAL;	}	/*  Status bytes:	 *  Byte 4: bit 3:1 : CI (Chip Identification) == 0	 *          bit 0   : internally set to 0	 *  Byte 5: bit 7:0 : == 0	 */	if (((buffer[3] & 0x0f) != 0x00) || (buffer[4] != 0x00)) {		tuner_warn("Chip ID is not zero. It is not a TEA5767\n");		return EINVAL;	}	/* It seems that tea5767 returns 0xff after the 5th byte */	if ((buffer[5] != 0xff) || (buffer[6] != 0xff)) {		tuner_warn("Returned more than 5 bytes. It is not a TEA5767\n");		return EINVAL;	}	tuner_warn("TEA5767 detected.\n");	return 0;}int tea5767_tuner_init(struct i2c_client *c){	struct tuner *t = i2c_get_clientdata(c);	tuner_info("type set to %d (%s)\n", t->type, "Philips TEA5767HN FM Radio");	strlcpy(c->name, "tea5767", sizeof(c->name));	t->set_tv_freq = set_tv_freq;	t->set_radio_freq = set_radio_freq;	t->has_signal = tea5767_signal;	t->is_stereo = tea5767_stereo;	t->standby = tea5767_standby;	return (0);}