[deliverable/linux.git] / drivers / media / video / tea5767.c

/*
 * For Philips TEA5767 FM Chip used on some TV Cards like Prolink Pixelview
 * I2C address is allways 0xC0.
 *
 * $Id: tea5767.c,v 1.27 2005/07/31 12:10:56 mchehab Exp $
 *
 * 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 "

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

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

/* Forth 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

/* Fiveth 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

/* Four register */
#define TEA5767_ADC_LEVEL_MASK	0xf0

/* should be 0 */
#define TEA5767_CHIP_ID_MASK	0x0f

/* Fiveth register */
/* Reserved for future extensions */
#define TEA5767_RESERVED_MASK	0xff

enum 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->mode == T_STANDBY) {
		tuner_dbg("TEA5767 set to standby mode\n");
		buffer[3] |= TEA5767_STDBY;
	}

	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) << (13 - 4));
}

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);
}

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 (7 != (rc = i2c_master_recv(c, buffer, 7))) {
		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;
	}

	/* 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->tv_freq = set_tv_freq;
	t->radio_freq = set_radio_freq;
	t->has_signal = tea5767_signal;
	t->is_stereo = tea5767_stereo;

	return (0);
}
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	*
001abc93	5	* $Id: tea5767.c,v 1.27 2005/07/31 12:10:56 mchehab Exp $
586b0cab MCC	6	*
	7	* Copyright (c) 2005 Mauro Carvalho Chehab (mchehab@brturbo.com.br)
	8	* This code is placed under the terms of the GNU General Public License
	9	*
	10	* tea5767 autodetection thanks to Torsten Seeboth and Atsushi Nakagawa
	11	* from their contributions on DScaler.
	12	*/
	13
586b0cab	14	#include <linux/i2c.h>
f7ce3cc6 MCC	15	#include <linux/videodev.h>
	16	#include <linux/delay.h>
	17	#include <media/tuner.h>
586b0cab MCC	18
	19	#define PREFIX "TEA5767 "
	20
	21	/*****************************************************************************/
	22
	23	/******************************
	24	* Write mode register values *
	25	******************************/
	26
	27	/* First register */
f7ce3cc6 MCC	28	#define TEA5767_MUTE 0x80 /* Mutes output */
f7ce3cc6 MCC	29	#define TEA5767_SEARCH 0x40 /* Activates station search */
586b0cab MCC	30	/* Bits 0-5 for divider MSB */
	31
	32	/* Second register */
	33	/* Bits 0-7 for divider LSB */
	34
	35	/* Third register */
	36
	37	/* Station search from botton to up */
	38	#define TEA5767_SEARCH_UP 0x80
	39
	40	/* Searches with ADC output = 10 */
	41	#define TEA5767_SRCH_HIGH_LVL 0x60
	42
	43	/* Searches with ADC output = 10 */
	44	#define TEA5767_SRCH_MID_LVL 0x40
	45
	46	/* Searches with ADC output = 5 */
	47	#define TEA5767_SRCH_LOW_LVL 0x20
	48
	49	/* if on, div=4(Frf+Fif)/Fref otherwise, div=4(Frf-Fif)/Freq) */
	50	#define TEA5767_HIGH_LO_INJECT 0x10
	51
	52	/* Disable stereo */
	53	#define TEA5767_MONO 0x08
	54
	55	/* Disable right channel and turns to mono */
	56	#define TEA5767_MUTE_RIGHT 0x04
	57
	58	/* Disable left channel and turns to mono */
	59	#define TEA5767_MUTE_LEFT 0x02
	60
	61	#define TEA5767_PORT1_HIGH 0x01
	62
	63	/* Forth register */
	64	#define TEA5767_PORT2_HIGH 0x80
	65	/* Chips stops working. Only I2C bus remains on */
	66	#define TEA5767_STDBY 0x40
	67
	68	/* Japan freq (76-108 MHz. If disabled, 87.5-108 MHz */
	69	#define TEA5767_JAPAN_BAND 0x20
	70
	71	/* Unselected means 32.768 KHz freq as reference. Otherwise Xtal at 13 MHz */
	72	#define TEA5767_XTAL_32768 0x10
	73
	74	/* Cuts weak signals */
	75	#define TEA5767_SOFT_MUTE 0x08
	76
	77	/* Activates high cut control */
	78	#define TEA5767_HIGH_CUT_CTRL 0x04
	79
	80	/* Activates stereo noise control */
	81	#define TEA5767_ST_NOISE_CTL 0x02
	82
	83	/* If activate PORT 1 indicates SEARCH or else it is used as PORT1 */
	84	#define TEA5767_SRCH_IND 0x01
	85
	86	/* Fiveth register */
	87
	88	/* By activating, it will use Xtal at 13 MHz as reference for divider */
	89	#define TEA5767_PLLREF_ENABLE 0x80
	90
	91	/* By activating, deemphasis=50, or else, deemphasis of 50us */
	92	#define TEA5767_DEEMPH_75 0X40
	93
94	/*****************************
95	* Read mode register values *
96	*****************************/
97
98	/* First register */
99	#define TEA5767_READY_FLAG_MASK 0x80
100	#define TEA5767_BAND_LIMIT_MASK 0X40
101	/* Bits 0-5 for divider MSB after search or preset */
102
103	/* Second register */
104	/* Bits 0-7 for divider LSB after search or preset */
105
106	/* Third register */
107	#define TEA5767_STEREO_MASK 0x80
108	#define TEA5767_IF_CNTR_MASK 0x7f
109
110	/* Four register */
111	#define TEA5767_ADC_LEVEL_MASK 0xf0
112
113	/* should be 0 */
114	#define TEA5767_CHIP_ID_MASK 0x0f
115
116	/* Fiveth register */
117	/* Reserved for future extensions */
118	#define TEA5767_RESERVED_MASK 0xff
119
f7ce3cc6 MCC	120	enum tea5767_xtal_freq {
	121	TEA5767_LOW_LO_32768 = 0,
	122	TEA5767_HIGH_LO_32768 = 1,
	123	TEA5767_LOW_LO_13MHz = 2,
	124	TEA5767_HIGH_LO_13MHz = 3,
	125	};
	126
	127
586b0cab MCC	128	/*****************************************************************************/
	129
	130	static void set_tv_freq(struct i2c_client *c, unsigned int freq)
	131	{
	132	struct tuner *t = i2c_get_clientdata(c);
	133
	134	tuner_warn("This tuner doesn't support TV freq.\n");
	135	}
	136
	137	static void tea5767_status_dump(unsigned char *buffer)
	138	{
	139	unsigned int div, frq;
	140
	141	if (TEA5767_READY_FLAG_MASK & buffer[0])
	142	printk(PREFIX "Ready Flag ON\n");
	143	else
	144	printk(PREFIX "Ready Flag OFF\n");
	145
	146	if (TEA5767_BAND_LIMIT_MASK & buffer[0])
	147	printk(PREFIX "Tuner at band limit\n");
	148	else
	149	printk(PREFIX "Tuner not at band limit\n");
	150
f7ce3cc6	151	div = ((buffer[0] & 0x3f) << 8) \| buffer[1];
586b0cab MCC	152
	153	switch (TEA5767_HIGH_LO_32768) {
	154	case TEA5767_HIGH_LO_13MHz:
c5287ba1	155	frq = (div * 50000 - 700000 - 225000) / 4; /* Freq in KHz */
586b0cab MCC	156	break;
586b0cab MCC	157	case TEA5767_LOW_LO_13MHz:
c5287ba1	158	frq = (div * 50000 + 700000 + 225000) / 4; /* Freq in KHz */
586b0cab MCC	159	break;
586b0cab MCC	160	case TEA5767_LOW_LO_32768:
c5287ba1	161	frq = (div * 32768 + 700000 + 225000) / 4; /* Freq in KHz */
586b0cab MCC	162	break;
	163	case TEA5767_HIGH_LO_32768:
	164	default:
c5287ba1	165	frq = (div * 32768 - 700000 - 225000) / 4; /* Freq in KHz */
586b0cab MCC	166	break;
586b0cab MCC	167	}
f7ce3cc6 MCC	168	buffer[0] = (div >> 8) & 0x3f;
f7ce3cc6 MCC	169	buffer[1] = div & 0xff;
586b0cab MCC	170
586b0cab MCC	171	printk(PREFIX "Frequency %d.%03d KHz (divider = 0x%04x)\n",
f7ce3cc6	172	frq / 1000, frq % 1000, div);
586b0cab MCC	173
	174	if (TEA5767_STEREO_MASK & buffer[2])
	175	printk(PREFIX "Stereo\n");
	176	else
	177	printk(PREFIX "Mono\n");
	178
f7ce3cc6	179	printk(PREFIX "IF Counter = %d\n", buffer[2] & TEA5767_IF_CNTR_MASK);
586b0cab	180
f7ce3cc6 MCC	181	printk(PREFIX "ADC Level = %d\n",
f7ce3cc6 MCC	182	(buffer[3] & TEA5767_ADC_LEVEL_MASK) >> 4);
586b0cab	183
f7ce3cc6	184	printk(PREFIX "Chip ID = %d\n", (buffer[3] & TEA5767_CHIP_ID_MASK));
586b0cab	185
f7ce3cc6 MCC	186	printk(PREFIX "Reserved = 0x%02x\n",
f7ce3cc6 MCC	187	(buffer[4] & TEA5767_RESERVED_MASK));
586b0cab MCC	188	}
	189
	190	/* Freq should be specifyed at 62.5 Hz */
	191	static void set_radio_freq(struct i2c_client *c, unsigned int frq)
	192	{
	193	struct tuner *t = i2c_get_clientdata(c);
f7ce3cc6	194	unsigned char buffer[5];
586b0cab MCC	195	unsigned div;
	196	int rc;
	197
c5287ba1	198	tuner_dbg (PREFIX "radio freq = %d.%03d MHz\n", frq/16000,(frq/16)%1000);
586b0cab MCC	199
	200	/* Rounds freq to next decimal value - for 62.5 KHz step */
	201	/* frq = 20(frq/16)+radio_frq[frq%16]; /
	202
	203	buffer[2] = TEA5767_PORT1_HIGH;
f7ce3cc6 MCC	204	buffer[3] = TEA5767_PORT2_HIGH \| TEA5767_HIGH_CUT_CTRL \|
	205	TEA5767_ST_NOISE_CTL \| TEA5767_JAPAN_BAND;
	206	buffer[4] = 0;
	207
	208	if (t->mode == T_STANDBY) {
	209	tuner_dbg("TEA5767 set to standby mode\n");
	210	buffer[3] \|= TEA5767_STDBY;
	211	}
586b0cab MCC	212
	213	if (t->audmode == V4L2_TUNER_MODE_MONO) {
	214	tuner_dbg("TEA5767 set to mono\n");
	215	buffer[2] \|= TEA5767_MONO;
f7ce3cc6 MCC	216	} else {
	217	tuner_dbg("TEA5767 set to stereo\n");
	218	}
586b0cab	219
f7ce3cc6 MCC	220	/* Should be replaced */
f7ce3cc6 MCC	221	switch (TEA5767_HIGH_LO_32768) {
586b0cab	222	case TEA5767_HIGH_LO_13MHz:
f7ce3cc6	223	tuner_dbg ("TEA5767 radio HIGH LO inject xtal @ 13 MHz\n");
586b0cab MCC	224	buffer[2] \|= TEA5767_HIGH_LO_INJECT;
586b0cab MCC	225	buffer[4] \|= TEA5767_PLLREF_ENABLE;
c5287ba1	226	div = (frq * 4000 / 16 + 700000 + 225000 + 25000) / 50000;
586b0cab MCC	227	break;
586b0cab MCC	228	case TEA5767_LOW_LO_13MHz:
f7ce3cc6	229	tuner_dbg ("TEA5767 radio LOW LO inject xtal @ 13 MHz\n");
586b0cab MCC	230
586b0cab MCC	231	buffer[4] \|= TEA5767_PLLREF_ENABLE;
c5287ba1	232	div = (frq * 4000 / 16 - 700000 - 225000 + 25000) / 50000;
586b0cab MCC	233	break;
586b0cab MCC	234	case TEA5767_LOW_LO_32768:
f7ce3cc6	235	tuner_dbg ("TEA5767 radio LOW LO inject xtal @ 32,768 MHz\n");
586b0cab MCC	236	buffer[3] \|= TEA5767_XTAL_32768;
586b0cab MCC	237	/* const 700=4000175 Khz - to adjust freq to right value /
c5287ba1	238	div = ((frq * 4000 / 16 - 700000 - 225000) + 16384) >> 15;
586b0cab MCC	239	break;
	240	case TEA5767_HIGH_LO_32768:
	241	default:
f7ce3cc6	242	tuner_dbg ("TEA5767 radio HIGH LO inject xtal @ 32,768 MHz\n");
586b0cab MCC	243
	244	buffer[2] \|= TEA5767_HIGH_LO_INJECT;
	245	buffer[3] \|= TEA5767_XTAL_32768;
c5287ba1	246	div = ((frq * (4000 / 16) + 700000 + 225000) + 16384) >> 15;
586b0cab MCC	247	break;
586b0cab MCC	248	}
f7ce3cc6 MCC	249	buffer[0] = (div >> 8) & 0x3f;
f7ce3cc6 MCC	250	buffer[1] = div & 0xff;
586b0cab	251
f7ce3cc6 MCC	252	if (5 != (rc = i2c_master_send(c, buffer, 5)))
f7ce3cc6 MCC	253	tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
c5287ba1 MCC	254
	255	if (tuner_debug) {
	256	if (5 != (rc = i2c_master_recv(c, buffer, 5)))
	257	tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
	258	else
	259	tea5767_status_dump(buffer);
	260	}
586b0cab MCC	261	}
	262
	263	static int tea5767_signal(struct i2c_client *c)
	264	{
	265	unsigned char buffer[5];
	266	int rc;
	267	struct tuner *t = i2c_get_clientdata(c);
	268
f7ce3cc6 MCC	269	memset(buffer, 0, sizeof(buffer));
	270	if (5 != (rc = i2c_master_recv(c, buffer, 5)))
	271	tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
586b0cab	272
f7ce3cc6	273	return ((buffer[3] & TEA5767_ADC_LEVEL_MASK) << (13 - 4));
586b0cab MCC	274	}
	275
	276	static int tea5767_stereo(struct i2c_client *c)
	277	{
	278	unsigned char buffer[5];
	279	int rc;
	280	struct tuner *t = i2c_get_clientdata(c);
	281
f7ce3cc6 MCC	282	memset(buffer, 0, sizeof(buffer));
	283	if (5 != (rc = i2c_master_recv(c, buffer, 5)))
	284	tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
586b0cab MCC	285
	286	rc = buffer[2] & TEA5767_STEREO_MASK;
	287
f7ce3cc6	288	tuner_dbg("TEA5767 radio ST GET = %02x\n", rc);
586b0cab	289
f7ce3cc6	290	return ((buffer[2] & TEA5767_STEREO_MASK) ? V4L2_TUNER_SUB_STEREO : 0);
586b0cab MCC	291	}
586b0cab MCC	292
f7ce3cc6	293	int tea5767_autodetection(struct i2c_client *c)
586b0cab	294	{
fd3113e8	295	unsigned char buffer[7] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
586b0cab MCC	296	int rc;
	297	struct tuner *t = i2c_get_clientdata(c);
	298
001abc93	299	if (7 != (rc = i2c_master_recv(c, buffer, 7))) {
c5287ba1	300	tuner_warn("It is not a TEA5767. Received %i bytes.\n", rc);
586b0cab MCC	301	return EINVAL;
	302	}
	303
fd3113e8	304	/* If all bytes are the same then it's a TV tuner and not a tea5767 */
f7ce3cc6 MCC	305	if (buffer[0] == buffer[1] && buffer[0] == buffer[2] &&
	306	buffer[0] == buffer[3] && buffer[0] == buffer[4]) {
	307	tuner_warn("All bytes are equal. It is not a TEA5767\n");
586b0cab MCC	308	return EINVAL;
	309	}
	310
	311	/* Status bytes:
	312	* Byte 4: bit 3:1 : CI (Chip Identification) == 0
f7ce3cc6	313	* bit 0 : internally set to 0
586b0cab MCC	314	* Byte 5: bit 7:0 : == 0
586b0cab MCC	315	*/
586b0cab	316	if (!((buffer[3] & 0x0f) == 0x00) && (buffer[4] == 0x00)) {
f7ce3cc6	317	tuner_warn("Chip ID is not zero. It is not a TEA5767\n");
586b0cab MCC	318	return EINVAL;
586b0cab MCC	319	}
fd3113e8 MCC	320	/* It seems that tea5767 returns 0xff after the 5th byte */
	321	if ((buffer[5] != 0xff) \|\| (buffer[6] != 0xff)) {
	322	tuner_warn("Returned more than 5 bytes. It is not a TEA5767\n");
	323	return EINVAL;
	324	}
c5287ba1	325
001abc93 MCC	326	/* It seems that tea5767 returns 0xff after the 5th byte */
	327	if ((buffer[5] != 0xff) \|\| (buffer[6] != 0xff)) {
	328	tuner_warn("Returned more than 5 bytes. It is not a TEA5767\n");
	329	return EINVAL;
	330	}
	331
f7ce3cc6	332	tuner_warn("TEA5767 detected.\n");
586b0cab MCC	333	return 0;
	334	}
	335
	336	int tea5767_tuner_init(struct i2c_client *c)
	337	{
	338	struct tuner *t = i2c_get_clientdata(c);
	339
001abc93 MCC	340	tuner_info("type set to %d (%s)\n", t->type,
001abc93 MCC	341	"Philips TEA5767HN FM Radio");
f7ce3cc6	342	strlcpy(c->name, "tea5767", sizeof(c->name));
586b0cab	343
f7ce3cc6	344	t->tv_freq = set_tv_freq;
586b0cab MCC	345	t->radio_freq = set_radio_freq;
586b0cab MCC	346	t->has_signal = tea5767_signal;
f7ce3cc6	347	t->is_stereo = tea5767_stereo;
586b0cab MCC	348
	349	return (0);
	350	}