[linux-2.6-block.git] / drivers / media / tuners / tea5767.c

// SPDX-License-Identifier: GPL-2.0
// For Philips TEA5767 FM Chip used on some TV Cards like Prolink Pixelview
// I2C address is always 0xC0.
//
// Copyright (c) 2005 Mauro Carvalho Chehab <mchehab@kernel.org>
//
// tea5767 autodetection thanks to Torsten Seeboth and Atsushi Nakagawa
// from their contributions on DScaler.

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#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) {
		pr_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]) {
		pr_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)) {
		pr_warn("Chip ID is not zero. It is not a TEA5767\n");
		return -EINVAL;
	}


	return 0;
}

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

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 const 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@kernel.org>");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
0c20e8ca MCC	1	// SPDX-License-Identifier: GPL-2.0
	2	// For Philips TEA5767 FM Chip used on some TV Cards like Prolink Pixelview
	3	// I2C address is always 0xC0.
	4	//
32590819	5	// Copyright (c) 2005 Mauro Carvalho Chehab <mchehab@kernel.org>
0c20e8ca MCC	6	//
	7	// tea5767 autodetection thanks to Torsten Seeboth and Atsushi Nakagawa
	8	// from their contributions on DScaler.
586b0cab	9
bc0495c4 MCC	10	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
bc0495c4 MCC	11
586b0cab	12	#include <linux/i2c.h>
5a0e3ad6	13	#include <linux/slab.h>
f7ce3cc6	14	#include <linux/delay.h>
7f6adeaf	15	#include <linux/videodev2.h>
8d0936ed MK	16	#include "tuner-i2c.h"
8d0936ed MK	17	#include "tea5767.h"
586b0cab	18
ff699e6b	19	static int debug;
8d0936ed MK	20	module_param(debug, int, 0644);
8d0936ed MK	21	MODULE_PARM_DESC(debug, "enable verbose debug messages");
586b0cab	22
0e1165e8	23	/*****************************************************************************/
8d0936ed	24
0e1165e8 MCC	25	struct tea5767_priv {
	26	struct tuner_i2c_props i2c_props;
	27	u32 frequency;
	28	struct tea5767_ctrl ctrl;
db8a6956 MK	29	};
db8a6956 MK	30
586b0cab MCC	31	/*****************************************************************************/
	32
	33	/******************************
	34	* Write mode register values *
	35	******************************/
	36
	37	/* First register */
f7ce3cc6 MCC	38	#define TEA5767_MUTE 0x80 /* Mutes output */
f7ce3cc6 MCC	39	#define TEA5767_SEARCH 0x40 /* Activates station search */
586b0cab MCC	40	/* Bits 0-5 for divider MSB */
	41
	42	/* Second register */
	43	/* Bits 0-7 for divider LSB */
	44
	45	/* Third register */
	46
	47	/* Station search from botton to up */
	48	#define TEA5767_SEARCH_UP 0x80
	49
	50	/* Searches with ADC output = 10 */
	51	#define TEA5767_SRCH_HIGH_LVL 0x60
	52
	53	/* Searches with ADC output = 10 */
	54	#define TEA5767_SRCH_MID_LVL 0x40
	55
	56	/* Searches with ADC output = 5 */
	57	#define TEA5767_SRCH_LOW_LVL 0x20
	58
	59	/* if on, div=4(Frf+Fif)/Fref otherwise, div=4(Frf-Fif)/Freq) */
	60	#define TEA5767_HIGH_LO_INJECT 0x10
	61
	62	/* Disable stereo */
	63	#define TEA5767_MONO 0x08
	64
	65	/* Disable right channel and turns to mono */
	66	#define TEA5767_MUTE_RIGHT 0x04
	67
	68	/* Disable left channel and turns to mono */
	69	#define TEA5767_MUTE_LEFT 0x02
	70
	71	#define TEA5767_PORT1_HIGH 0x01
	72
27487d44	73	/* Fourth register */
586b0cab MCC	74	#define TEA5767_PORT2_HIGH 0x80
	75	/* Chips stops working. Only I2C bus remains on */
	76	#define TEA5767_STDBY 0x40
	77
	78	/* Japan freq (76-108 MHz. If disabled, 87.5-108 MHz */
	79	#define TEA5767_JAPAN_BAND 0x20
	80
	81	/* Unselected means 32.768 KHz freq as reference. Otherwise Xtal at 13 MHz */
	82	#define TEA5767_XTAL_32768 0x10
	83
	84	/* Cuts weak signals */
	85	#define TEA5767_SOFT_MUTE 0x08
	86
	87	/* Activates high cut control */
	88	#define TEA5767_HIGH_CUT_CTRL 0x04
	89
	90	/* Activates stereo noise control */
	91	#define TEA5767_ST_NOISE_CTL 0x02
	92
	93	/* If activate PORT 1 indicates SEARCH or else it is used as PORT1 */
	94	#define TEA5767_SRCH_IND 0x01
	95
27487d44	96	/* Fifth register */
586b0cab MCC	97
	98	/* By activating, it will use Xtal at 13 MHz as reference for divider */
	99	#define TEA5767_PLLREF_ENABLE 0x80
	100
	101	/* By activating, deemphasis=50, or else, deemphasis of 50us */
	102	#define TEA5767_DEEMPH_75 0X40
	103
	104	/*****************************
	105	* Read mode register values *
	106	*****************************/
	107
	108	/* First register */
	109	#define TEA5767_READY_FLAG_MASK 0x80
	110	#define TEA5767_BAND_LIMIT_MASK 0X40
	111	/* Bits 0-5 for divider MSB after search or preset */
	112
	113	/* Second register */
	114	/* Bits 0-7 for divider LSB after search or preset */
	115
	116	/* Third register */
	117	#define TEA5767_STEREO_MASK 0x80
	118	#define TEA5767_IF_CNTR_MASK 0x7f
	119
27487d44	120	/* Fourth register */
586b0cab MCC	121	#define TEA5767_ADC_LEVEL_MASK 0xf0
	122
	123	/* should be 0 */
	124	#define TEA5767_CHIP_ID_MASK 0x0f
	125
27487d44	126	/* Fifth register */
586b0cab MCC	127	/* Reserved for future extensions */
	128	#define TEA5767_RESERVED_MASK 0xff
	129
	130	/*****************************************************************************/
	131
0e1165e8 MCC	132	static void tea5767_status_dump(struct tea5767_priv *priv,
0e1165e8 MCC	133	unsigned char *buffer)
586b0cab MCC	134	{
	135	unsigned int div, frq;
	136
	137	if (TEA5767_READY_FLAG_MASK & buffer[0])
2756665c	138	tuner_info("Ready Flag ON\n");
586b0cab	139	else
2756665c	140	tuner_info("Ready Flag OFF\n");
586b0cab MCC	141
586b0cab MCC	142	if (TEA5767_BAND_LIMIT_MASK & buffer[0])
2756665c	143	tuner_info("Tuner at band limit\n");
586b0cab	144	else
2756665c	145	tuner_info("Tuner not at band limit\n");
586b0cab	146
f7ce3cc6	147	div = ((buffer[0] & 0x3f) << 8) \| buffer[1];
586b0cab	148
0e1165e8	149	switch (priv->ctrl.xtal_freq) {
586b0cab	150	case TEA5767_HIGH_LO_13MHz:
c5287ba1	151	frq = (div * 50000 - 700000 - 225000) / 4; /* Freq in KHz */
586b0cab MCC	152	break;
586b0cab MCC	153	case TEA5767_LOW_LO_13MHz:
c5287ba1	154	frq = (div * 50000 + 700000 + 225000) / 4; /* Freq in KHz */
586b0cab MCC	155	break;
586b0cab MCC	156	case TEA5767_LOW_LO_32768:
c5287ba1	157	frq = (div * 32768 + 700000 + 225000) / 4; /* Freq in KHz */
586b0cab MCC	158	break;
	159	case TEA5767_HIGH_LO_32768:
	160	default:
c5287ba1	161	frq = (div * 32768 - 700000 - 225000) / 4; /* Freq in KHz */
586b0cab MCC	162	break;
586b0cab MCC	163	}
f7ce3cc6 MCC	164	buffer[0] = (div >> 8) & 0x3f;
f7ce3cc6 MCC	165	buffer[1] = div & 0xff;
586b0cab	166
2756665c MK	167	tuner_info("Frequency %d.%03d KHz (divider = 0x%04x)\n",
2756665c MK	168	frq / 1000, frq % 1000, div);
586b0cab MCC	169
586b0cab MCC	170	if (TEA5767_STEREO_MASK & buffer[2])
2756665c	171	tuner_info("Stereo\n");
586b0cab	172	else
2756665c	173	tuner_info("Mono\n");
586b0cab	174
2756665c	175	tuner_info("IF Counter = %d\n", buffer[2] & TEA5767_IF_CNTR_MASK);
586b0cab	176
2756665c MK	177	tuner_info("ADC Level = %d\n",
2756665c MK	178	(buffer[3] & TEA5767_ADC_LEVEL_MASK) >> 4);
586b0cab	179
2756665c	180	tuner_info("Chip ID = %d\n", (buffer[3] & TEA5767_CHIP_ID_MASK));
586b0cab	181
2756665c MK	182	tuner_info("Reserved = 0x%02x\n",
2756665c MK	183	(buffer[4] & TEA5767_RESERVED_MASK));
586b0cab MCC	184	}
	185
	186	/* Freq should be specifyed at 62.5 Hz */
8d0936ed MK	187	static int set_radio_freq(struct dvb_frontend *fe,
8d0936ed MK	188	struct analog_parameters *params)
586b0cab	189	{
8d0936ed MK	190	struct tea5767_priv *priv = fe->tuner_priv;
8d0936ed MK	191	unsigned int frq = params->frequency;
f7ce3cc6	192	unsigned char buffer[5];
586b0cab MCC	193	unsigned div;
	194	int rc;
	195
8d0936ed	196	tuner_dbg("radio freq = %d.%03d MHz\n", frq/16000,(frq/16)%1000);
586b0cab	197
0e1165e8	198	buffer[2] = 0;
586b0cab	199
0e1165e8 MCC	200	if (priv->ctrl.port1)
0e1165e8 MCC	201	buffer[2] \|= TEA5767_PORT1_HIGH;
f7ce3cc6	202
8d0936ed	203	if (params->audmode == V4L2_TUNER_MODE_MONO) {
586b0cab MCC	204	tuner_dbg("TEA5767 set to mono\n");
586b0cab MCC	205	buffer[2] \|= TEA5767_MONO;
f7ce3cc6 MCC	206	} else {
	207	tuner_dbg("TEA5767 set to stereo\n");
	208	}
586b0cab	209
0e1165e8 MCC	210
	211	buffer[3] = 0;
	212
	213	if (priv->ctrl.port2)
	214	buffer[3] \|= TEA5767_PORT2_HIGH;
	215
	216	if (priv->ctrl.high_cut)
	217	buffer[3] \|= TEA5767_HIGH_CUT_CTRL;
	218
	219	if (priv->ctrl.st_noise)
	220	buffer[3] \|= TEA5767_ST_NOISE_CTL;
	221
	222	if (priv->ctrl.soft_mute)
	223	buffer[3] \|= TEA5767_SOFT_MUTE;
	224
	225	if (priv->ctrl.japan_band)
	226	buffer[3] \|= TEA5767_JAPAN_BAND;
	227
	228	buffer[4] = 0;
	229
	230	if (priv->ctrl.deemph_75)
	231	buffer[4] \|= TEA5767_DEEMPH_75;
	232
	233	if (priv->ctrl.pllref)
	234	buffer[4] \|= TEA5767_PLLREF_ENABLE;
	235
	236
	237	/* Rounds freq to next decimal value - for 62.5 KHz step */
	238	/* frq = 20(frq/16)+radio_frq[frq%16]; /
	239
	240	switch (priv->ctrl.xtal_freq) {
586b0cab	241	case TEA5767_HIGH_LO_13MHz:
8d0936ed	242	tuner_dbg("radio HIGH LO inject xtal @ 13 MHz\n");
586b0cab	243	buffer[2] \|= TEA5767_HIGH_LO_INJECT;
27487d44	244	div = (frq * (4000 / 16) + 700000 + 225000 + 25000) / 50000;
586b0cab MCC	245	break;
586b0cab MCC	246	case TEA5767_LOW_LO_13MHz:
8d0936ed	247	tuner_dbg("radio LOW LO inject xtal @ 13 MHz\n");
586b0cab	248
27487d44	249	div = (frq * (4000 / 16) - 700000 - 225000 + 25000) / 50000;
586b0cab MCC	250	break;
586b0cab MCC	251	case TEA5767_LOW_LO_32768:
8d0936ed	252	tuner_dbg("radio LOW LO inject xtal @ 32,768 MHz\n");
586b0cab MCC	253	buffer[3] \|= TEA5767_XTAL_32768;
586b0cab MCC	254	/* const 700=4000175 Khz - to adjust freq to right value /
27487d44	255	div = ((frq * (4000 / 16) - 700000 - 225000) + 16384) >> 15;
586b0cab MCC	256	break;
	257	case TEA5767_HIGH_LO_32768:
	258	default:
8d0936ed	259	tuner_dbg("radio HIGH LO inject xtal @ 32,768 MHz\n");
586b0cab MCC	260
	261	buffer[2] \|= TEA5767_HIGH_LO_INJECT;
	262	buffer[3] \|= TEA5767_XTAL_32768;
c5287ba1	263	div = ((frq * (4000 / 16) + 700000 + 225000) + 16384) >> 15;
586b0cab MCC	264	break;
586b0cab MCC	265	}
f7ce3cc6 MCC	266	buffer[0] = (div >> 8) & 0x3f;
f7ce3cc6 MCC	267	buffer[1] = div & 0xff;
586b0cab	268
db8a6956	269	if (5 != (rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 5)))
f7ce3cc6	270	tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
c5287ba1	271
8d0936ed	272	if (debug) {
db8a6956	273	if (5 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 5)))
c5287ba1 MCC	274	tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
c5287ba1 MCC	275	else
0e1165e8	276	tea5767_status_dump(priv, buffer);
c5287ba1	277	}
8d0936ed MK	278
	279	priv->frequency = frq * 125 / 2;
	280
	281	return 0;
586b0cab MCC	282	}
586b0cab MCC	283
6b897f2c	284	static int tea5767_read_status(struct dvb_frontend fe, char buffer)
586b0cab	285	{
8d0936ed	286	struct tea5767_priv *priv = fe->tuner_priv;
6b897f2c	287	int rc;
586b0cab	288
6b897f2c MK	289	memset(buffer, 0, 5);
6b897f2c MK	290	if (5 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 5))) {
f7ce3cc6	291	tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
6b897f2c MK	292	return -EREMOTEIO;
6b897f2c MK	293	}
586b0cab	294
6b897f2c	295	return 0;
586b0cab MCC	296	}
586b0cab MCC	297
6b897f2c	298	static inline int tea5767_signal(struct dvb_frontend fe, const char buffer)
586b0cab	299	{
8d0936ed	300	struct tea5767_priv *priv = fe->tuner_priv;
586b0cab	301
6b897f2c MK	302	int signal = ((buffer[3] & TEA5767_ADC_LEVEL_MASK) << 8);
	303
	304	tuner_dbg("Signal strength: %d\n", signal);
	305
	306	return signal;
	307	}
586b0cab	308
6b897f2c MK	309	static inline int tea5767_stereo(struct dvb_frontend fe, const char buffer)
	310	{
	311	struct tea5767_priv *priv = fe->tuner_priv;
586b0cab	312
6b897f2c	313	int stereo = buffer[2] & TEA5767_STEREO_MASK;
586b0cab	314
6b897f2c MK	315	tuner_dbg("Radio ST GET = %02x\n", stereo);
	316
	317	return (stereo ? V4L2_TUNER_SUB_STEREO : 0);
586b0cab MCC	318	}
586b0cab MCC	319
8d0936ed MK	320	static int tea5767_get_status(struct dvb_frontend fe, u32 status)
8d0936ed MK	321	{
6b897f2c MK	322	unsigned char buffer[5];
6b897f2c MK	323
8d0936ed MK	324	*status = 0;
8d0936ed MK	325
6b897f2c MK	326	if (0 == tea5767_read_status(fe, buffer)) {
	327	if (tea5767_signal(fe, buffer))
	328	*status = TUNER_STATUS_LOCKED;
	329	if (tea5767_stereo(fe, buffer))
	330	*status \|= TUNER_STATUS_STEREO;
	331	}
	332
	333	return 0;
	334	}
	335
	336	static int tea5767_get_rf_strength(struct dvb_frontend fe, u16 strength)
	337	{
	338	unsigned char buffer[5];
	339
	340	*strength = 0;
8d0936ed	341
6b897f2c MK	342	if (0 == tea5767_read_status(fe, buffer))
6b897f2c MK	343	*strength = tea5767_signal(fe, buffer);
8d0936ed MK	344
	345	return 0;
	346	}
	347
	348	static int tea5767_standby(struct dvb_frontend *fe)
793cf9e6 MCC	349	{
793cf9e6 MCC	350	unsigned char buffer[5];
8d0936ed	351	struct tea5767_priv *priv = fe->tuner_priv;
793cf9e6 MCC	352	unsigned div, rc;
	353
	354	div = (87500 * 4 + 700 + 225 + 25) / 50; /* Set frequency to 87.5 MHz */
	355	buffer[0] = (div >> 8) & 0x3f;
	356	buffer[1] = div & 0xff;
	357	buffer[2] = TEA5767_PORT1_HIGH;
	358	buffer[3] = TEA5767_PORT2_HIGH \| TEA5767_HIGH_CUT_CTRL \|
	359	TEA5767_ST_NOISE_CTL \| TEA5767_JAPAN_BAND \| TEA5767_STDBY;
	360	buffer[4] = 0;
	361
db8a6956	362	if (5 != (rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 5)))
793cf9e6	363	tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
8d0936ed MK	364
8d0936ed MK	365	return 0;
793cf9e6 MCC	366	}
793cf9e6 MCC	367
8d0936ed	368	int tea5767_autodetection(struct i2c_adapter* i2c_adap, u8 i2c_addr)
586b0cab	369	{
8d0936ed	370	struct tuner_i2c_props i2c = { .adap = i2c_adap, .addr = i2c_addr };
fd3113e8	371	unsigned char buffer[7] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
bc0495c4	372
586b0cab	373	int rc;
586b0cab	374
8d0936ed	375	if ((rc = tuner_i2c_xfer_recv(&i2c, buffer, 7))< 5) {
bc0495c4	376	pr_warn("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]) {
bc0495c4	383	pr_warn("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)) {
bc0495c4	393	pr_warn("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
f2709c20 MCC	401	static void tea5767_release(struct dvb_frontend *fe)
	402	{
	403	kfree(fe->tuner_priv);
	404	fe->tuner_priv = NULL;
	405	}
	406
8d0936ed MK	407	static int tea5767_get_frequency(struct dvb_frontend fe, u32 frequency)
	408	{
	409	struct tea5767_priv *priv = fe->tuner_priv;
	410	*frequency = priv->frequency;
0e1165e8 MCC	411
	412	return 0;
	413	}
	414
	415	static int tea5767_set_config (struct dvb_frontend fe, void priv_cfg)
	416	{
	417	struct tea5767_priv *priv = fe->tuner_priv;
	418
	419	memcpy(&priv->ctrl, priv_cfg, sizeof(priv->ctrl));
	420
8d0936ed MK	421	return 0;
	422	}
	423
96105144	424	static const struct dvb_tuner_ops tea5767_tuner_ops = {
8d0936ed MK	425	.info = {
	426	.name = "tea5767", // Philips TEA5767HN FM Radio
	427	},
	428
	429	.set_analog_params = set_radio_freq,
0e1165e8	430	.set_config = tea5767_set_config,
8d0936ed	431	.sleep = tea5767_standby,
f2709c20	432	.release = tea5767_release,
8d0936ed MK	433	.get_frequency = tea5767_get_frequency,
8d0936ed MK	434	.get_status = tea5767_get_status,
6b897f2c	435	.get_rf_strength = tea5767_get_rf_strength,
0f838f8d MK	436	};
0f838f8d MK	437
8d0936ed MK	438	struct dvb_frontend tea5767_attach(struct dvb_frontend fe,
	439	struct i2c_adapter* i2c_adap,
	440	u8 i2c_addr)
586b0cab	441	{
db8a6956 MK	442	struct tea5767_priv *priv = NULL;
	443
	444	priv = kzalloc(sizeof(struct tea5767_priv), GFP_KERNEL);
	445	if (priv == NULL)
8d0936ed MK	446	return NULL;
8d0936ed MK	447	fe->tuner_priv = priv;
db8a6956	448
0e1165e8 MCC	449	priv->i2c_props.addr = i2c_addr;
0e1165e8 MCC	450	priv->i2c_props.adap = i2c_adap;
2756665c MK	451	priv->i2c_props.name = "tea5767";
2756665c MK	452
0e1165e8 MCC	453	priv->ctrl.xtal_freq = TEA5767_HIGH_LO_32768;
	454	priv->ctrl.port1 = 1;
	455	priv->ctrl.port2 = 1;
	456	priv->ctrl.high_cut = 1;
	457	priv->ctrl.st_noise = 1;
	458	priv->ctrl.japan_band = 1;
586b0cab	459
8d0936ed MK	460	memcpy(&fe->ops.tuner_ops, &tea5767_tuner_ops,
8d0936ed MK	461	sizeof(struct dvb_tuner_ops));
586b0cab	462
8d0936ed	463	tuner_info("type set to %s\n", "Philips TEA5767HN FM Radio");
586b0cab	464
8d0936ed	465	return fe;
586b0cab	466	}
8d0936ed	467
8d0936ed MK	468	EXPORT_SYMBOL_GPL(tea5767_attach);
	469	EXPORT_SYMBOL_GPL(tea5767_autodetection);
	470
	471	MODULE_DESCRIPTION("Philips TEA5767 FM tuner driver");
32590819	472	MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@kernel.org>");
0c20e8ca	473	MODULE_LICENSE("GPL v2");