[linux-block.git] / drivers / media / common / tuners / tea5767.c

/*
 * 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@infradead.org)
 * 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/slab.h>
#include <linux/delay.h>
#include <linux/videodev2.h>
#include "tuner-i2c.h"
#include "tea5767.h"

static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "enable verbose debug messages");

/*****************************************************************************/

struct tea5767_priv {
	struct tuner_i2c_props	i2c_props;
	u32			frequency;
	struct tea5767_ctrl	ctrl;
};

/*****************************************************************************/

/******************************
 * 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	0xff

/*****************************************************************************/

static void tea5767_status_dump(struct tea5767_priv *priv,
				unsigned char *buffer)
{
	unsigned int div, frq;

	if (TEA5767_READY_FLAG_MASK & buffer[0])
		tuner_info("Ready Flag ON\n");
	else
		tuner_info("Ready Flag OFF\n");

	if (TEA5767_BAND_LIMIT_MASK & buffer[0])
		tuner_info("Tuner at band limit\n");
	else
		tuner_info("Tuner not at band limit\n");

	div = ((buffer[0] & 0x3f) << 8) | buffer[1];

	switch (priv->ctrl.xtal_freq) {
	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;

	tuner_info("Frequency %d.%03d KHz (divider = 0x%04x)\n",
		   frq / 1000, frq % 1000, div);

	if (TEA5767_STEREO_MASK & buffer[2])
		tuner_info("Stereo\n");
	else
		tuner_info("Mono\n");

	tuner_info("IF Counter = %d\n", buffer[2] & TEA5767_IF_CNTR_MASK);

	tuner_info("ADC Level = %d\n",
		   (buffer[3] & TEA5767_ADC_LEVEL_MASK) >> 4);

	tuner_info("Chip ID = %d\n", (buffer[3] & TEA5767_CHIP_ID_MASK));

	tuner_info("Reserved = 0x%02x\n",
		   (buffer[4] & TEA5767_RESERVED_MASK));
}

/* Freq should be specifyed at 62.5 Hz */
static int set_radio_freq(struct dvb_frontend *fe,
			  struct analog_parameters *params)
{
	struct tea5767_priv *priv = fe->tuner_priv;
	unsigned int frq = params->frequency;
	unsigned char buffer[5];
	unsigned div;
	int rc;

	tuner_dbg("radio freq = %d.%03d MHz\n", frq/16000,(frq/16)%1000);

	buffer[2] = 0;

	if (priv->ctrl.port1)
		buffer[2] |= TEA5767_PORT1_HIGH;

	if (params->audmode == V4L2_TUNER_MODE_MONO) {
		tuner_dbg("TEA5767 set to mono\n");
		buffer[2] |= TEA5767_MONO;
	} else {
		tuner_dbg("TEA5767 set to stereo\n");
	}


	buffer[3] = 0;

	if (priv->ctrl.port2)
		buffer[3] |= TEA5767_PORT2_HIGH;

	if (priv->ctrl.high_cut)
		buffer[3] |= TEA5767_HIGH_CUT_CTRL;

	if (priv->ctrl.st_noise)
		buffer[3] |= TEA5767_ST_NOISE_CTL;

	if (priv->ctrl.soft_mute)
		buffer[3] |= TEA5767_SOFT_MUTE;

	if (priv->ctrl.japan_band)
		buffer[3] |= TEA5767_JAPAN_BAND;

	buffer[4] = 0;

	if (priv->ctrl.deemph_75)
		buffer[4] |= TEA5767_DEEMPH_75;

	if (priv->ctrl.pllref)
		buffer[4] |= TEA5767_PLLREF_ENABLE;


	/* Rounds freq to next decimal value - for 62.5 KHz step */
	/* frq = 20*(frq/16)+radio_frq[frq%16]; */

	switch (priv->ctrl.xtal_freq) {
	case TEA5767_HIGH_LO_13MHz:
		tuner_dbg("radio HIGH LO inject xtal @ 13 MHz\n");
		buffer[2] |= TEA5767_HIGH_LO_INJECT;
		div = (frq * (4000 / 16) + 700000 + 225000 + 25000) / 50000;
		break;
	case TEA5767_LOW_LO_13MHz:
		tuner_dbg("radio LOW LO inject xtal @ 13 MHz\n");

		div = (frq * (4000 / 16) - 700000 - 225000 + 25000) / 50000;
		break;
	case TEA5767_LOW_LO_32768:
		tuner_dbg("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("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 = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 5)))
		tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);

	if (debug) {
		if (5 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 5)))
			tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
		else
			tea5767_status_dump(priv, buffer);
	}

	priv->frequency = frq * 125 / 2;

	return 0;
}

static int tea5767_read_status(struct dvb_frontend *fe, char *buffer)
{
	struct tea5767_priv *priv = fe->tuner_priv;
	int rc;

	memset(buffer, 0, 5);
	if (5 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 5))) {
		tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
		return -EREMOTEIO;
	}

	return 0;
}

static inline int tea5767_signal(struct dvb_frontend *fe, const char *buffer)
{
	struct tea5767_priv *priv = fe->tuner_priv;

	int signal = ((buffer[3] & TEA5767_ADC_LEVEL_MASK) << 8);

	tuner_dbg("Signal strength: %d\n", signal);

	return signal;
}

static inline int tea5767_stereo(struct dvb_frontend *fe, const char *buffer)
{
	struct tea5767_priv *priv = fe->tuner_priv;

	int stereo = buffer[2] & TEA5767_STEREO_MASK;

	tuner_dbg("Radio ST GET = %02x\n", stereo);

	return (stereo ? V4L2_TUNER_SUB_STEREO : 0);
}

static int tea5767_get_status(struct dvb_frontend *fe, u32 *status)
{
	unsigned char buffer[5];

	*status = 0;

	if (0 == tea5767_read_status(fe, buffer)) {
		if (tea5767_signal(fe, buffer))
			*status = TUNER_STATUS_LOCKED;
		if (tea5767_stereo(fe, buffer))
			*status |= TUNER_STATUS_STEREO;
	}

	return 0;
}

static int tea5767_get_rf_strength(struct dvb_frontend *fe, u16 *strength)
{
	unsigned char buffer[5];

	*strength = 0;

	if (0 == tea5767_read_status(fe, buffer))
		*strength = tea5767_signal(fe, buffer);

	return 0;
}

static int tea5767_standby(struct dvb_frontend *fe)
{
	unsigned char buffer[5];
	struct tea5767_priv *priv = fe->tuner_priv;
	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 = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 5)))
		tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);

	return 0;
}

int tea5767_autodetection(struct i2c_adapter* i2c_adap, u8 i2c_addr)
{
	struct tuner_i2c_props i2c = { .adap = i2c_adap, .addr = i2c_addr };
	unsigned char buffer[7] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
	int rc;

	if ((rc = tuner_i2c_xfer_recv(&i2c, buffer, 7))< 5) {
		printk(KERN_WARNING "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]) {
		printk(KERN_WARNING "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)) {
		printk(KERN_WARNING "Chip ID is not zero. It is not a TEA5767\n");
		return -EINVAL;
	}


	return 0;
}

static int tea5767_release(struct dvb_frontend *fe)
{
	kfree(fe->tuner_priv);
	fe->tuner_priv = NULL;

	return 0;
}

static int tea5767_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{
	struct tea5767_priv *priv = fe->tuner_priv;
	*frequency = priv->frequency;

	return 0;
}

static int tea5767_set_config (struct dvb_frontend *fe, void *priv_cfg)
{
	struct tea5767_priv *priv = fe->tuner_priv;

	memcpy(&priv->ctrl, priv_cfg, sizeof(priv->ctrl));

	return 0;
}

static struct dvb_tuner_ops tea5767_tuner_ops = {
	.info = {
		.name           = "tea5767", // Philips TEA5767HN FM Radio
	},

	.set_analog_params = set_radio_freq,
	.set_config	   = tea5767_set_config,
	.sleep             = tea5767_standby,
	.release           = tea5767_release,
	.get_frequency     = tea5767_get_frequency,
	.get_status        = tea5767_get_status,
	.get_rf_strength   = tea5767_get_rf_strength,
};

struct dvb_frontend *tea5767_attach(struct dvb_frontend *fe,
				    struct i2c_adapter* i2c_adap,
				    u8 i2c_addr)
{
	struct tea5767_priv *priv = NULL;

	priv = kzalloc(sizeof(struct tea5767_priv), GFP_KERNEL);
	if (priv == NULL)
		return NULL;
	fe->tuner_priv = priv;

	priv->i2c_props.addr  = i2c_addr;
	priv->i2c_props.adap  = i2c_adap;
	priv->i2c_props.name  = "tea5767";

	priv->ctrl.xtal_freq  = TEA5767_HIGH_LO_32768;
	priv->ctrl.port1      = 1;
	priv->ctrl.port2      = 1;
	priv->ctrl.high_cut   = 1;
	priv->ctrl.st_noise   = 1;
	priv->ctrl.japan_band = 1;

	memcpy(&fe->ops.tuner_ops, &tea5767_tuner_ops,
	       sizeof(struct dvb_tuner_ops));

	tuner_info("type set to %s\n", "Philips TEA5767HN FM Radio");

	return fe;
}

EXPORT_SYMBOL_GPL(tea5767_attach);
EXPORT_SYMBOL_GPL(tea5767_autodetection);

MODULE_DESCRIPTION("Philips TEA5767 FM tuner driver");
MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
MODULE_LICENSE("GPL");
Commit	Line	Data
586b0cab MCC	1	/*
	2	* For Philips TEA5767 FM Chip used on some TV Cards like Prolink Pixelview
	3	* I2C address is allways 0xC0.
	4	*
586b0cab	5	*
2e7c6dc3	6	* Copyright (c) 2005 Mauro Carvalho Chehab (mchehab@infradead.org)
586b0cab MCC	7	* This code is placed under the terms of the GNU General Public License
	8	*
	9	* tea5767 autodetection thanks to Torsten Seeboth and Atsushi Nakagawa
	10	* from their contributions on DScaler.
	11	*/
	12
586b0cab	13	#include <linux/i2c.h>
5a0e3ad6	14	#include <linux/slab.h>
f7ce3cc6	15	#include <linux/delay.h>
7f6adeaf	16	#include <linux/videodev2.h>
8d0936ed MK	17	#include "tuner-i2c.h"
8d0936ed MK	18	#include "tea5767.h"
586b0cab	19
ff699e6b	20	static int debug;
8d0936ed MK	21	module_param(debug, int, 0644);
8d0936ed MK	22	MODULE_PARM_DESC(debug, "enable verbose debug messages");
586b0cab	23
0e1165e8	24	/*****************************************************************************/
8d0936ed	25
0e1165e8 MCC	26	struct tea5767_priv {
	27	struct tuner_i2c_props i2c_props;
	28	u32 frequency;
	29	struct tea5767_ctrl ctrl;
db8a6956 MK	30	};
db8a6956 MK	31
586b0cab MCC	32	/*****************************************************************************/
	33
	34	/******************************
	35	* Write mode register values *
	36	******************************/
	37
	38	/* First register */
f7ce3cc6 MCC	39	#define TEA5767_MUTE 0x80 /* Mutes output */
f7ce3cc6 MCC	40	#define TEA5767_SEARCH 0x40 /* Activates station search */
586b0cab MCC	41	/* Bits 0-5 for divider MSB */
	42
	43	/* Second register */
	44	/* Bits 0-7 for divider LSB */
	45
	46	/* Third register */
	47
	48	/* Station search from botton to up */
	49	#define TEA5767_SEARCH_UP 0x80
	50
	51	/* Searches with ADC output = 10 */
	52	#define TEA5767_SRCH_HIGH_LVL 0x60
	53
	54	/* Searches with ADC output = 10 */
	55	#define TEA5767_SRCH_MID_LVL 0x40
	56
	57	/* Searches with ADC output = 5 */
	58	#define TEA5767_SRCH_LOW_LVL 0x20
	59
	60	/* if on, div=4(Frf+Fif)/Fref otherwise, div=4(Frf-Fif)/Freq) */
	61	#define TEA5767_HIGH_LO_INJECT 0x10
	62
	63	/* Disable stereo */
	64	#define TEA5767_MONO 0x08
	65
	66	/* Disable right channel and turns to mono */
	67	#define TEA5767_MUTE_RIGHT 0x04
	68
	69	/* Disable left channel and turns to mono */
	70	#define TEA5767_MUTE_LEFT 0x02
	71
	72	#define TEA5767_PORT1_HIGH 0x01
	73
27487d44	74	/* Fourth register */
586b0cab MCC	75	#define TEA5767_PORT2_HIGH 0x80
	76	/* Chips stops working. Only I2C bus remains on */
	77	#define TEA5767_STDBY 0x40
	78
	79	/* Japan freq (76-108 MHz. If disabled, 87.5-108 MHz */
	80	#define TEA5767_JAPAN_BAND 0x20
	81
	82	/* Unselected means 32.768 KHz freq as reference. Otherwise Xtal at 13 MHz */
	83	#define TEA5767_XTAL_32768 0x10
	84
	85	/* Cuts weak signals */
	86	#define TEA5767_SOFT_MUTE 0x08
	87
	88	/* Activates high cut control */
	89	#define TEA5767_HIGH_CUT_CTRL 0x04
	90
	91	/* Activates stereo noise control */
	92	#define TEA5767_ST_NOISE_CTL 0x02
	93
	94	/* If activate PORT 1 indicates SEARCH or else it is used as PORT1 */
	95	#define TEA5767_SRCH_IND 0x01
	96
27487d44	97	/* Fifth register */
586b0cab MCC	98
	99	/* By activating, it will use Xtal at 13 MHz as reference for divider */
	100	#define TEA5767_PLLREF_ENABLE 0x80
	101
	102	/* By activating, deemphasis=50, or else, deemphasis of 50us */
	103	#define TEA5767_DEEMPH_75 0X40
	104
	105	/*****************************
	106	* Read mode register values *
	107	*****************************/
	108
	109	/* First register */
	110	#define TEA5767_READY_FLAG_MASK 0x80
	111	#define TEA5767_BAND_LIMIT_MASK 0X40
	112	/* Bits 0-5 for divider MSB after search or preset */
	113
	114	/* Second register */
	115	/* Bits 0-7 for divider LSB after search or preset */
	116
	117	/* Third register */
	118	#define TEA5767_STEREO_MASK 0x80
	119	#define TEA5767_IF_CNTR_MASK 0x7f
	120
27487d44	121	/* Fourth register */
586b0cab MCC	122	#define TEA5767_ADC_LEVEL_MASK 0xf0
	123
	124	/* should be 0 */
	125	#define TEA5767_CHIP_ID_MASK 0x0f
	126
27487d44	127	/* Fifth register */
586b0cab MCC	128	/* Reserved for future extensions */
	129	#define TEA5767_RESERVED_MASK 0xff
	130
	131	/*****************************************************************************/
	132
0e1165e8 MCC	133	static void tea5767_status_dump(struct tea5767_priv *priv,
0e1165e8 MCC	134	unsigned char *buffer)
586b0cab MCC	135	{
	136	unsigned int div, frq;
	137
	138	if (TEA5767_READY_FLAG_MASK & buffer[0])
2756665c	139	tuner_info("Ready Flag ON\n");
586b0cab	140	else
2756665c	141	tuner_info("Ready Flag OFF\n");
586b0cab MCC	142
586b0cab MCC	143	if (TEA5767_BAND_LIMIT_MASK & buffer[0])
2756665c	144	tuner_info("Tuner at band limit\n");
586b0cab	145	else
2756665c	146	tuner_info("Tuner not at band limit\n");
586b0cab	147
f7ce3cc6	148	div = ((buffer[0] & 0x3f) << 8) \| buffer[1];
586b0cab	149
0e1165e8	150	switch (priv->ctrl.xtal_freq) {
586b0cab	151	case TEA5767_HIGH_LO_13MHz:
c5287ba1	152	frq = (div * 50000 - 700000 - 225000) / 4; /* Freq in KHz */
586b0cab MCC	153	break;
586b0cab MCC	154	case TEA5767_LOW_LO_13MHz:
c5287ba1	155	frq = (div * 50000 + 700000 + 225000) / 4; /* Freq in KHz */
586b0cab MCC	156	break;
586b0cab MCC	157	case TEA5767_LOW_LO_32768:
c5287ba1	158	frq = (div * 32768 + 700000 + 225000) / 4; /* Freq in KHz */
586b0cab MCC	159	break;
	160	case TEA5767_HIGH_LO_32768:
	161	default:
c5287ba1	162	frq = (div * 32768 - 700000 - 225000) / 4; /* Freq in KHz */
586b0cab MCC	163	break;
586b0cab MCC	164	}
f7ce3cc6 MCC	165	buffer[0] = (div >> 8) & 0x3f;
f7ce3cc6 MCC	166	buffer[1] = div & 0xff;
586b0cab	167
2756665c MK	168	tuner_info("Frequency %d.%03d KHz (divider = 0x%04x)\n",
2756665c MK	169	frq / 1000, frq % 1000, div);
586b0cab MCC	170
586b0cab MCC	171	if (TEA5767_STEREO_MASK & buffer[2])
2756665c	172	tuner_info("Stereo\n");
586b0cab	173	else
2756665c	174	tuner_info("Mono\n");
586b0cab	175
2756665c	176	tuner_info("IF Counter = %d\n", buffer[2] & TEA5767_IF_CNTR_MASK);
586b0cab	177
2756665c MK	178	tuner_info("ADC Level = %d\n",
2756665c MK	179	(buffer[3] & TEA5767_ADC_LEVEL_MASK) >> 4);
586b0cab	180
2756665c	181	tuner_info("Chip ID = %d\n", (buffer[3] & TEA5767_CHIP_ID_MASK));
586b0cab	182
2756665c MK	183	tuner_info("Reserved = 0x%02x\n",
2756665c MK	184	(buffer[4] & TEA5767_RESERVED_MASK));
586b0cab MCC	185	}
	186
	187	/* Freq should be specifyed at 62.5 Hz */
8d0936ed MK	188	static int set_radio_freq(struct dvb_frontend *fe,
8d0936ed MK	189	struct analog_parameters *params)
586b0cab	190	{
8d0936ed MK	191	struct tea5767_priv *priv = fe->tuner_priv;
8d0936ed MK	192	unsigned int frq = params->frequency;
f7ce3cc6	193	unsigned char buffer[5];
586b0cab MCC	194	unsigned div;
	195	int rc;
	196
8d0936ed	197	tuner_dbg("radio freq = %d.%03d MHz\n", frq/16000,(frq/16)%1000);
586b0cab	198
0e1165e8	199	buffer[2] = 0;
586b0cab	200
0e1165e8 MCC	201	if (priv->ctrl.port1)
0e1165e8 MCC	202	buffer[2] \|= TEA5767_PORT1_HIGH;
f7ce3cc6	203
8d0936ed	204	if (params->audmode == V4L2_TUNER_MODE_MONO) {
586b0cab MCC	205	tuner_dbg("TEA5767 set to mono\n");
586b0cab MCC	206	buffer[2] \|= TEA5767_MONO;
f7ce3cc6 MCC	207	} else {
	208	tuner_dbg("TEA5767 set to stereo\n");
	209	}
586b0cab	210
0e1165e8 MCC	211
	212	buffer[3] = 0;
	213
	214	if (priv->ctrl.port2)
	215	buffer[3] \|= TEA5767_PORT2_HIGH;
	216
	217	if (priv->ctrl.high_cut)
	218	buffer[3] \|= TEA5767_HIGH_CUT_CTRL;
	219
	220	if (priv->ctrl.st_noise)
	221	buffer[3] \|= TEA5767_ST_NOISE_CTL;
	222
	223	if (priv->ctrl.soft_mute)
	224	buffer[3] \|= TEA5767_SOFT_MUTE;
	225
	226	if (priv->ctrl.japan_band)
	227	buffer[3] \|= TEA5767_JAPAN_BAND;
	228
	229	buffer[4] = 0;
	230
	231	if (priv->ctrl.deemph_75)
	232	buffer[4] \|= TEA5767_DEEMPH_75;
	233
	234	if (priv->ctrl.pllref)
	235	buffer[4] \|= TEA5767_PLLREF_ENABLE;
	236
	237
	238	/* Rounds freq to next decimal value - for 62.5 KHz step */
	239	/* frq = 20(frq/16)+radio_frq[frq%16]; /
	240
	241	switch (priv->ctrl.xtal_freq) {
586b0cab	242	case TEA5767_HIGH_LO_13MHz:
8d0936ed	243	tuner_dbg("radio HIGH LO inject xtal @ 13 MHz\n");
586b0cab	244	buffer[2] \|= TEA5767_HIGH_LO_INJECT;
27487d44	245	div = (frq * (4000 / 16) + 700000 + 225000 + 25000) / 50000;
586b0cab MCC	246	break;
586b0cab MCC	247	case TEA5767_LOW_LO_13MHz:
8d0936ed	248	tuner_dbg("radio LOW LO inject xtal @ 13 MHz\n");
586b0cab	249
27487d44	250	div = (frq * (4000 / 16) - 700000 - 225000 + 25000) / 50000;
586b0cab MCC	251	break;
586b0cab MCC	252	case TEA5767_LOW_LO_32768:
8d0936ed	253	tuner_dbg("radio LOW LO inject xtal @ 32,768 MHz\n");
586b0cab MCC	254	buffer[3] \|= TEA5767_XTAL_32768;
586b0cab MCC	255	/* const 700=4000175 Khz - to adjust freq to right value /
27487d44	256	div = ((frq * (4000 / 16) - 700000 - 225000) + 16384) >> 15;
586b0cab MCC	257	break;
	258	case TEA5767_HIGH_LO_32768:
	259	default:
8d0936ed	260	tuner_dbg("radio HIGH LO inject xtal @ 32,768 MHz\n");
586b0cab MCC	261
	262	buffer[2] \|= TEA5767_HIGH_LO_INJECT;
	263	buffer[3] \|= TEA5767_XTAL_32768;
c5287ba1	264	div = ((frq * (4000 / 16) + 700000 + 225000) + 16384) >> 15;
586b0cab MCC	265	break;
586b0cab MCC	266	}
f7ce3cc6 MCC	267	buffer[0] = (div >> 8) & 0x3f;
f7ce3cc6 MCC	268	buffer[1] = div & 0xff;
586b0cab	269
db8a6956	270	if (5 != (rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 5)))
f7ce3cc6	271	tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
c5287ba1	272
8d0936ed	273	if (debug) {
db8a6956	274	if (5 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 5)))
c5287ba1 MCC	275	tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
c5287ba1 MCC	276	else
0e1165e8	277	tea5767_status_dump(priv, buffer);
c5287ba1	278	}
8d0936ed MK	279
	280	priv->frequency = frq * 125 / 2;
	281
	282	return 0;
586b0cab MCC	283	}
586b0cab MCC	284
6b897f2c	285	static int tea5767_read_status(struct dvb_frontend fe, char buffer)
586b0cab	286	{
8d0936ed	287	struct tea5767_priv *priv = fe->tuner_priv;
6b897f2c	288	int rc;
586b0cab	289
6b897f2c MK	290	memset(buffer, 0, 5);
6b897f2c MK	291	if (5 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 5))) {
f7ce3cc6	292	tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
6b897f2c MK	293	return -EREMOTEIO;
6b897f2c MK	294	}
586b0cab	295
6b897f2c	296	return 0;
586b0cab MCC	297	}
586b0cab MCC	298
6b897f2c	299	static inline int tea5767_signal(struct dvb_frontend fe, const char buffer)
586b0cab	300	{
8d0936ed	301	struct tea5767_priv *priv = fe->tuner_priv;
586b0cab	302
6b897f2c MK	303	int signal = ((buffer[3] & TEA5767_ADC_LEVEL_MASK) << 8);
	304
	305	tuner_dbg("Signal strength: %d\n", signal);
	306
	307	return signal;
	308	}
586b0cab	309
6b897f2c MK	310	static inline int tea5767_stereo(struct dvb_frontend fe, const char buffer)
	311	{
	312	struct tea5767_priv *priv = fe->tuner_priv;
586b0cab	313
6b897f2c	314	int stereo = buffer[2] & TEA5767_STEREO_MASK;
586b0cab	315
6b897f2c MK	316	tuner_dbg("Radio ST GET = %02x\n", stereo);
	317
	318	return (stereo ? V4L2_TUNER_SUB_STEREO : 0);
586b0cab MCC	319	}
586b0cab MCC	320
8d0936ed MK	321	static int tea5767_get_status(struct dvb_frontend fe, u32 status)
8d0936ed MK	322	{
6b897f2c MK	323	unsigned char buffer[5];
6b897f2c MK	324
8d0936ed MK	325	*status = 0;
8d0936ed MK	326
6b897f2c MK	327	if (0 == tea5767_read_status(fe, buffer)) {
	328	if (tea5767_signal(fe, buffer))
	329	*status = TUNER_STATUS_LOCKED;
	330	if (tea5767_stereo(fe, buffer))
	331	*status \|= TUNER_STATUS_STEREO;
	332	}
	333
	334	return 0;
	335	}
	336
	337	static int tea5767_get_rf_strength(struct dvb_frontend fe, u16 strength)
	338	{
	339	unsigned char buffer[5];
	340
	341	*strength = 0;
8d0936ed	342
6b897f2c MK	343	if (0 == tea5767_read_status(fe, buffer))
6b897f2c MK	344	*strength = tea5767_signal(fe, buffer);
8d0936ed MK	345
	346	return 0;
	347	}
	348
	349	static int tea5767_standby(struct dvb_frontend *fe)
793cf9e6 MCC	350	{
793cf9e6 MCC	351	unsigned char buffer[5];
8d0936ed	352	struct tea5767_priv *priv = fe->tuner_priv;
793cf9e6 MCC	353	unsigned div, rc;
	354
	355	div = (87500 * 4 + 700 + 225 + 25) / 50; /* Set frequency to 87.5 MHz */
	356	buffer[0] = (div >> 8) & 0x3f;
	357	buffer[1] = div & 0xff;
	358	buffer[2] = TEA5767_PORT1_HIGH;
	359	buffer[3] = TEA5767_PORT2_HIGH \| TEA5767_HIGH_CUT_CTRL \|
	360	TEA5767_ST_NOISE_CTL \| TEA5767_JAPAN_BAND \| TEA5767_STDBY;
	361	buffer[4] = 0;
	362
db8a6956	363	if (5 != (rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 5)))
793cf9e6	364	tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
8d0936ed MK	365
8d0936ed MK	366	return 0;
793cf9e6 MCC	367	}
793cf9e6 MCC	368
8d0936ed	369	int tea5767_autodetection(struct i2c_adapter* i2c_adap, u8 i2c_addr)
586b0cab	370	{
8d0936ed	371	struct tuner_i2c_props i2c = { .adap = i2c_adap, .addr = i2c_addr };
fd3113e8	372	unsigned char buffer[7] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
586b0cab	373	int rc;
586b0cab	374
8d0936ed MK	375	if ((rc = tuner_i2c_xfer_recv(&i2c, buffer, 7))< 5) {
8d0936ed MK	376	printk(KERN_WARNING "It is not a TEA5767. Received %i bytes.\n", rc);
b538d28c	377	return -EINVAL;
586b0cab MCC	378	}
586b0cab MCC	379
fd3113e8	380	/* If all bytes are the same then it's a TV tuner and not a tea5767 */
f7ce3cc6 MCC	381	if (buffer[0] == buffer[1] && buffer[0] == buffer[2] &&
f7ce3cc6 MCC	382	buffer[0] == buffer[3] && buffer[0] == buffer[4]) {
8d0936ed	383	printk(KERN_WARNING "All bytes are equal. It is not a TEA5767\n");
b538d28c	384	return -EINVAL;
586b0cab MCC	385	}
	386
	387	/* Status bytes:
	388	* Byte 4: bit 3:1 : CI (Chip Identification) == 0
f7ce3cc6	389	* bit 0 : internally set to 0
586b0cab MCC	390	* Byte 5: bit 7:0 : == 0
586b0cab MCC	391	*/
793cf9e6	392	if (((buffer[3] & 0x0f) != 0x00) \|\| (buffer[4] != 0x00)) {
8d0936ed	393	printk(KERN_WARNING "Chip ID is not zero. It is not a TEA5767\n");
b538d28c	394	return -EINVAL;
586b0cab	395	}
c5287ba1	396
001abc93	397
586b0cab MCC	398	return 0;
	399	}
	400
8d0936ed	401	static int tea5767_release(struct dvb_frontend *fe)
db8a6956	402	{
8d0936ed MK	403	kfree(fe->tuner_priv);
	404	fe->tuner_priv = NULL;
	405
	406	return 0;
db8a6956 MK	407	}
db8a6956 MK	408
8d0936ed MK	409	static int tea5767_get_frequency(struct dvb_frontend fe, u32 frequency)
	410	{
	411	struct tea5767_priv *priv = fe->tuner_priv;
	412	*frequency = priv->frequency;
0e1165e8 MCC	413
	414	return 0;
	415	}
	416
	417	static int tea5767_set_config (struct dvb_frontend fe, void priv_cfg)
	418	{
	419	struct tea5767_priv *priv = fe->tuner_priv;
	420
	421	memcpy(&priv->ctrl, priv_cfg, sizeof(priv->ctrl));
	422
8d0936ed MK	423	return 0;
	424	}
	425
	426	static struct dvb_tuner_ops tea5767_tuner_ops = {
	427	.info = {
	428	.name = "tea5767", // Philips TEA5767HN FM Radio
	429	},
	430
	431	.set_analog_params = set_radio_freq,
0e1165e8	432	.set_config = tea5767_set_config,
8d0936ed MK	433	.sleep = tea5767_standby,
	434	.release = tea5767_release,
	435	.get_frequency = tea5767_get_frequency,
	436	.get_status = tea5767_get_status,
6b897f2c	437	.get_rf_strength = tea5767_get_rf_strength,
0f838f8d MK	438	};
0f838f8d MK	439
8d0936ed MK	440	struct dvb_frontend tea5767_attach(struct dvb_frontend fe,
	441	struct i2c_adapter* i2c_adap,
	442	u8 i2c_addr)
586b0cab	443	{
db8a6956 MK	444	struct tea5767_priv *priv = NULL;
	445
	446	priv = kzalloc(sizeof(struct tea5767_priv), GFP_KERNEL);
	447	if (priv == NULL)
8d0936ed MK	448	return NULL;
8d0936ed MK	449	fe->tuner_priv = priv;
db8a6956	450
0e1165e8 MCC	451	priv->i2c_props.addr = i2c_addr;
0e1165e8 MCC	452	priv->i2c_props.adap = i2c_adap;
2756665c MK	453	priv->i2c_props.name = "tea5767";
2756665c MK	454
0e1165e8 MCC	455	priv->ctrl.xtal_freq = TEA5767_HIGH_LO_32768;
	456	priv->ctrl.port1 = 1;
	457	priv->ctrl.port2 = 1;
	458	priv->ctrl.high_cut = 1;
	459	priv->ctrl.st_noise = 1;
	460	priv->ctrl.japan_band = 1;
586b0cab	461
8d0936ed MK	462	memcpy(&fe->ops.tuner_ops, &tea5767_tuner_ops,
8d0936ed MK	463	sizeof(struct dvb_tuner_ops));
586b0cab	464
8d0936ed	465	tuner_info("type set to %s\n", "Philips TEA5767HN FM Radio");
586b0cab	466
8d0936ed	467	return fe;
586b0cab	468	}
8d0936ed	469
8d0936ed MK	470	EXPORT_SYMBOL_GPL(tea5767_attach);
	471	EXPORT_SYMBOL_GPL(tea5767_autodetection);
	472
	473	MODULE_DESCRIPTION("Philips TEA5767 FM tuner driver");
	474	MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
	475	MODULE_LICENSE("GPL");