drivers/media/common/tuners/tea5761.c - kernel/msm-4.19 - Gitiles

 /*
  * For Philips TEA5761 FM Chip
  * I2C address is allways 0x20 (0x10 at 7-bit mode).
  *
  * Copyright (c) 2005-2007 Mauro Carvalho Chehab (mchehab@infradead.org)
  * This code is placed under the terms of the GNUv2 General Public License
  *
  */

 #include <linux/i2c.h>
 #include <linux/delay.h>
 #include <linux/videodev.h>
 #include <media/tuner.h>
 #include "tuner-i2c.h"
 #include "tea5761.h"

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

 struct tea5761_priv {
 	struct tuner_i2c_props i2c_props;

 	u32 frequency;
 };

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

 /***************************
  * TEA5761HN I2C registers *
  ***************************/

 /* INTREG - Read: bytes 0 and 1 / Write: byte 0 */

 	/* first byte for reading */
 #define TEA5761_INTREG_IFFLAG		0x10
 #define TEA5761_INTREG_LEVFLAG		0x8
 #define TEA5761_INTREG_FRRFLAG		0x2
 #define TEA5761_INTREG_BLFLAG		0x1

 	/* second byte for reading / byte for writing */
 #define TEA5761_INTREG_IFMSK		0x10
 #define TEA5761_INTREG_LEVMSK		0x8
 #define TEA5761_INTREG_FRMSK		0x2
 #define TEA5761_INTREG_BLMSK		0x1

 /* FRQSET - Read: bytes 2 and 3 / Write: byte 1 and 2 */

 	/* First byte */
 #define TEA5761_FRQSET_SEARCH_UP 0x80		/* 1=Station search from botton to up */
 #define TEA5761_FRQSET_SEARCH_MODE 0x40		/* 1=Search mode */

 	/* Bits 0-5 for divider MSB */

 	/* Second byte */
 	/* Bits 0-7 for divider LSB */

 /* TNCTRL - Read: bytes 4 and 5 / Write: Bytes 3 and 4 */

 	/* first byte */

 #define TEA5761_TNCTRL_PUPD_0	0x40	/* Power UP/Power Down MSB */
 #define TEA5761_TNCTRL_BLIM	0X20	/* 1= Japan Frequencies, 0= European frequencies */
 #define TEA5761_TNCTRL_SWPM	0x10	/* 1= software port is FRRFLAG */
 #define TEA5761_TNCTRL_IFCTC	0x08	/* 1= IF count time 15.02 ms, 0= IF count time 2.02 ms */
 #define TEA5761_TNCTRL_AFM	0x04
 #define TEA5761_TNCTRL_SMUTE	0x02	/* 1= Soft mute */
 #define TEA5761_TNCTRL_SNC	0x01

 	/* second byte */

 #define TEA5761_TNCTRL_MU	0x80	/* 1=Hard mute */
 #define TEA5761_TNCTRL_SSL_1	0x40
 #define TEA5761_TNCTRL_SSL_0	0x20
 #define TEA5761_TNCTRL_HLSI	0x10
 #define TEA5761_TNCTRL_MST	0x08	/* 1 = mono */
 #define TEA5761_TNCTRL_SWP	0x04
 #define TEA5761_TNCTRL_DTC	0x02	/* 1 = deemphasis 50 us, 0 = deemphasis 75 us */
 #define TEA5761_TNCTRL_AHLSI	0x01

 /* FRQCHECK - Read: bytes 6 and 7  */
 	/* First byte */

 	/* Bits 0-5 for divider MSB */

 	/* Second byte */
 	/* Bits 0-7 for divider LSB */

 /* TUNCHECK - Read: bytes 8 and 9  */

 	/* First byte */
 #define TEA5761_TUNCHECK_IF_MASK	0x7e	/* IF count */
 #define TEA5761_TUNCHECK_TUNTO		0x01

 	/* Second byte */
 #define TEA5761_TUNCHECK_LEV_MASK	0xf0	/* Level Count */
 #define TEA5761_TUNCHECK_LD		0x08
 #define TEA5761_TUNCHECK_STEREO		0x04

 /* TESTREG - Read: bytes 10 and 11 / Write: bytes 5 and 6 */

 	/* All zero = no test mode */

 /* MANID - Read: bytes 12 and 13 */

 	/* First byte - should be 0x10 */
 #define TEA5767_MANID_VERSION_MASK	0xf0	/* Version = 1 */
 #define TEA5767_MANID_ID_MSB_MASK	0x0f	/* Manufacurer ID - should be 0 */

 	/* Second byte - Should be 0x2b */

 #define TEA5767_MANID_ID_LSB_MASK	0xfe	/* Manufacturer ID - should be 0x15 */
 #define TEA5767_MANID_IDAV		0x01	/* 1 = Chip has ID, 0 = Chip has no ID */

 /* Chip ID - Read: bytes 14 and 15 */

 	/* First byte - should be 0x57 */

 	/* Second byte - should be 0x61 */

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

 #define FREQ_OFFSET 0 /* for TEA5767, it is 700 to give the right freq */
 static void tea5761_status_dump(unsigned char *buffer)
 {
 	unsigned int div, frq;

 	div = ((buffer[2] & 0x3f) << 8) | buffer[3];

 	frq = 1000 * (div * 32768 / 1000 + FREQ_OFFSET + 225) / 4;	/* Freq in KHz */

 	printk(KERN_INFO "tea5761: Frequency %d.%03d KHz (divider = 0x%04x)\n",
 	       frq / 1000, frq % 1000, div);
 }

 /* Freq should be specifyed at 62.5 Hz */
 static int set_radio_freq(struct dvb_frontend *fe,
 			  struct analog_parameters *params)
 {
 	struct tea5761_priv *priv = fe->tuner_priv;
 	unsigned int frq = params->frequency;
 	unsigned char buffer[7] = {0, 0, 0, 0, 0, 0, 0 };
 	unsigned div;
 	int rc;

 	tuner_dbg("radio freq counter %d\n", frq);

 	if (params->mode == T_STANDBY) {
 		tuner_dbg("TEA5761 set to standby mode\n");
 		buffer[5] |= TEA5761_TNCTRL_MU;
 	} else {
 		buffer[4] |= TEA5761_TNCTRL_PUPD_0;
 	}


 	if (params->audmode == V4L2_TUNER_MODE_MONO) {
 		tuner_dbg("TEA5761 set to mono\n");
 		buffer[5] |= TEA5761_TNCTRL_MST;
 	} else {
 		tuner_dbg("TEA5761 set to stereo\n");
 	}

 	div = (1000 * (frq * 4 / 16 + 700 + 225) ) >> 15;
 	buffer[1] = (div >> 8) & 0x3f;
 	buffer[2] = div & 0xff;

 	if (debug)
 		tea5761_status_dump(buffer);

 	if (7 != (rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 7)))
 		tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);

 	priv->frequency = frq * 125 / 2;

 	return 0;
 }

 static int tea5761_read_status(struct dvb_frontend *fe, char *buffer)
 {
 	struct tea5761_priv *priv = fe->tuner_priv;
 	int rc;

 	memset(buffer, 0, 16);
 	if (16 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 16))) {
 		tuner_warn("i2c i/o error: rc == %d (should be 16)\n", rc);
 		return -EREMOTEIO;
 	}

 	return 0;
 }

 static inline int tea5761_signal(struct dvb_frontend *fe, const char *buffer)
 {
 	struct tea5761_priv *priv = fe->tuner_priv;

 	int signal = ((buffer[9] & TEA5761_TUNCHECK_LEV_MASK) << (13 - 4));

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

 	return signal;
 }

 static inline int tea5761_stereo(struct dvb_frontend *fe, const char *buffer)
 {
 	struct tea5761_priv *priv = fe->tuner_priv;

 	int stereo = buffer[9] & TEA5761_TUNCHECK_STEREO;

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

 	return (stereo ? V4L2_TUNER_SUB_STEREO : 0);
 }

 static int tea5761_get_status(struct dvb_frontend *fe, u32 *status)
 {
 	unsigned char buffer[16];

 	*status = 0;

 	if (0 == tea5761_read_status(fe, buffer)) {
 		if (tea5761_signal(fe, buffer))
 			*status = TUNER_STATUS_LOCKED;
 		if (tea5761_stereo(fe, buffer))
 			*status |= TUNER_STATUS_STEREO;
 	}

 	return 0;
 }

 static int tea5761_get_rf_strength(struct dvb_frontend *fe, u16 *strength)
 {
 	unsigned char buffer[16];

 	*strength = 0;

 	if (0 == tea5761_read_status(fe, buffer))
 		*strength = tea5761_signal(fe, buffer);

 	return 0;
 }

 int tea5761_autodetection(struct i2c_adapter* i2c_adap, u8 i2c_addr)
 {
 	unsigned char buffer[16];
 	int rc;
 	struct tuner_i2c_props i2c = { .adap = i2c_adap, .addr = i2c_addr };

 	if (16 != (rc = tuner_i2c_xfer_recv(&i2c, buffer, 16))) {
 		printk(KERN_WARNING "it is not a TEA5761. Received %i chars.\n", rc);
 		return -EINVAL;
 	}

 	if ((buffer[13] != 0x2b) || (buffer[14] != 0x57) || (buffer[15] != 0x061)) {
 		printk(KERN_WARNING "Manufacturer ID= 0x%02x, Chip ID = %02x%02x."
 				    " It is not a TEA5761\n",
 				    buffer[13], buffer[14], buffer[15]);
 		return -EINVAL;
 	}
 	printk(KERN_WARNING "tea5761: TEA%02x%02x detected. "
 			    "Manufacturer ID= 0x%02x\n",
 			    buffer[14], buffer[15], buffer[13]);

 	return 0;
 }

 static int tea5761_release(struct dvb_frontend *fe)
 {
 	kfree(fe->tuner_priv);
 	fe->tuner_priv = NULL;

 	return 0;
 }

 static int tea5761_get_frequency(struct dvb_frontend *fe, u32 *frequency)
 {
 	struct tea5761_priv *priv = fe->tuner_priv;
 	*frequency = priv->frequency;
 	return 0;
 }

 static struct dvb_tuner_ops tea5761_tuner_ops = {
 	.info = {
 		.name           = "tea5761", // Philips TEA5761HN FM Radio
 	},
 	.set_analog_params = set_radio_freq,
 	.release           = tea5761_release,
 	.get_frequency     = tea5761_get_frequency,
 	.get_status        = tea5761_get_status,
 	.get_rf_strength   = tea5761_get_rf_strength,
 };

 struct dvb_frontend *tea5761_attach(struct dvb_frontend *fe,
 				    struct i2c_adapter* i2c_adap,
 				    u8 i2c_addr)
 {
 	struct tea5761_priv *priv = NULL;

 	if (tea5761_autodetection(i2c_adap, i2c_addr) != 0)
 		return NULL;

 	priv = kzalloc(sizeof(struct tea5761_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 = "tea5761";

 	memcpy(&fe->ops.tuner_ops, &tea5761_tuner_ops,
 	       sizeof(struct dvb_tuner_ops));

 	tuner_info("type set to %s\n", "Philips TEA5761HN FM Radio");

 	return fe;
 }


 EXPORT_SYMBOL_GPL(tea5761_attach);
 EXPORT_SYMBOL_GPL(tea5761_autodetection);

 MODULE_DESCRIPTION("Philips TEA5761 FM tuner driver");
 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
 MODULE_LICENSE("GPL");
	/*
	* For Philips TEA5761 FM Chip
	* I2C address is allways 0x20 (0x10 at 7-bit mode).
	*
	* Copyright (c) 2005-2007 Mauro Carvalho Chehab (mchehab@infradead.org)
	* This code is placed under the terms of the GNUv2 General Public License
	*
	*/

	#include <linux/i2c.h>
	#include <linux/delay.h>
	#include <linux/videodev.h>
	#include <media/tuner.h>
	#include "tuner-i2c.h"
	#include "tea5761.h"

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

	struct tea5761_priv {
	struct tuner_i2c_props i2c_props;

	u32 frequency;
	};

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

	/***************************
	* TEA5761HN I2C registers *
	***************************/

	/* INTREG - Read: bytes 0 and 1 / Write: byte 0 */

	/* first byte for reading */
	#define TEA5761_INTREG_IFFLAG 0x10
	#define TEA5761_INTREG_LEVFLAG 0x8
	#define TEA5761_INTREG_FRRFLAG 0x2
	#define TEA5761_INTREG_BLFLAG 0x1

	/* second byte for reading / byte for writing */
	#define TEA5761_INTREG_IFMSK 0x10
	#define TEA5761_INTREG_LEVMSK 0x8
	#define TEA5761_INTREG_FRMSK 0x2
	#define TEA5761_INTREG_BLMSK 0x1

	/* FRQSET - Read: bytes 2 and 3 / Write: byte 1 and 2 */

	/* First byte */
	#define TEA5761_FRQSET_SEARCH_UP 0x80 /* 1=Station search from botton to up */
	#define TEA5761_FRQSET_SEARCH_MODE 0x40 /* 1=Search mode */

	/* Bits 0-5 for divider MSB */

	/* Second byte */
	/* Bits 0-7 for divider LSB */

	/* TNCTRL - Read: bytes 4 and 5 / Write: Bytes 3 and 4 */

	/* first byte */

	#define TEA5761_TNCTRL_PUPD_0 0x40 /* Power UP/Power Down MSB */
	#define TEA5761_TNCTRL_BLIM 0X20 /* 1= Japan Frequencies, 0= European frequencies */
	#define TEA5761_TNCTRL_SWPM 0x10 /* 1= software port is FRRFLAG */
	#define TEA5761_TNCTRL_IFCTC 0x08 /* 1= IF count time 15.02 ms, 0= IF count time 2.02 ms */
	#define TEA5761_TNCTRL_AFM 0x04
	#define TEA5761_TNCTRL_SMUTE 0x02 /* 1= Soft mute */
	#define TEA5761_TNCTRL_SNC 0x01

	/* second byte */

	#define TEA5761_TNCTRL_MU 0x80 /* 1=Hard mute */
	#define TEA5761_TNCTRL_SSL_1 0x40
	#define TEA5761_TNCTRL_SSL_0 0x20
	#define TEA5761_TNCTRL_HLSI 0x10
	#define TEA5761_TNCTRL_MST 0x08 /* 1 = mono */
	#define TEA5761_TNCTRL_SWP 0x04
	#define TEA5761_TNCTRL_DTC 0x02 /* 1 = deemphasis 50 us, 0 = deemphasis 75 us */
	#define TEA5761_TNCTRL_AHLSI 0x01

	/* FRQCHECK - Read: bytes 6 and 7 */
	/* First byte */

	/* Bits 0-5 for divider MSB */

	/* Second byte */
	/* Bits 0-7 for divider LSB */

	/* TUNCHECK - Read: bytes 8 and 9 */

	/* First byte */
	#define TEA5761_TUNCHECK_IF_MASK 0x7e /* IF count */
	#define TEA5761_TUNCHECK_TUNTO 0x01

	/* Second byte */
	#define TEA5761_TUNCHECK_LEV_MASK 0xf0 /* Level Count */
	#define TEA5761_TUNCHECK_LD 0x08
	#define TEA5761_TUNCHECK_STEREO 0x04

	/* TESTREG - Read: bytes 10 and 11 / Write: bytes 5 and 6 */

	/* All zero = no test mode */

	/* MANID - Read: bytes 12 and 13 */

	/* First byte - should be 0x10 */
	#define TEA5767_MANID_VERSION_MASK 0xf0 /* Version = 1 */
	#define TEA5767_MANID_ID_MSB_MASK 0x0f /* Manufacurer ID - should be 0 */

	/* Second byte - Should be 0x2b */

	#define TEA5767_MANID_ID_LSB_MASK 0xfe /* Manufacturer ID - should be 0x15 */
	#define TEA5767_MANID_IDAV 0x01 /* 1 = Chip has ID, 0 = Chip has no ID */

	/* Chip ID - Read: bytes 14 and 15 */

	/* First byte - should be 0x57 */

	/* Second byte - should be 0x61 */

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

	#define FREQ_OFFSET 0 /* for TEA5767, it is 700 to give the right freq */
	static void tea5761_status_dump(unsigned char *buffer)
	{
	unsigned int div, frq;

	div = ((buffer[2] & 0x3f) << 8) \| buffer[3];

	frq = 1000 * (div * 32768 / 1000 + FREQ_OFFSET + 225) / 4; /* Freq in KHz */

	printk(KERN_INFO "tea5761: Frequency %d.%03d KHz (divider = 0x%04x)\n",
	frq / 1000, frq % 1000, div);
	}

	/* Freq should be specifyed at 62.5 Hz */
	static int set_radio_freq(struct dvb_frontend *fe,
	struct analog_parameters *params)
	{
	struct tea5761_priv *priv = fe->tuner_priv;
	unsigned int frq = params->frequency;
	unsigned char buffer[7] = {0, 0, 0, 0, 0, 0, 0 };
	unsigned div;
	int rc;

	tuner_dbg("radio freq counter %d\n", frq);

	if (params->mode == T_STANDBY) {
	tuner_dbg("TEA5761 set to standby mode\n");
	buffer[5] \|= TEA5761_TNCTRL_MU;
	} else {
	buffer[4] \|= TEA5761_TNCTRL_PUPD_0;
	}


	if (params->audmode == V4L2_TUNER_MODE_MONO) {
	tuner_dbg("TEA5761 set to mono\n");
	buffer[5] \|= TEA5761_TNCTRL_MST;
	} else {
	tuner_dbg("TEA5761 set to stereo\n");
	}

	div = (1000 * (frq * 4 / 16 + 700 + 225) ) >> 15;
	buffer[1] = (div >> 8) & 0x3f;
	buffer[2] = div & 0xff;

	if (debug)
	tea5761_status_dump(buffer);

	if (7 != (rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 7)))
	tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);

	priv->frequency = frq * 125 / 2;

	return 0;
	}

	static int tea5761_read_status(struct dvb_frontend fe, char buffer)
	{
	struct tea5761_priv *priv = fe->tuner_priv;
	int rc;

	memset(buffer, 0, 16);
	if (16 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 16))) {
	tuner_warn("i2c i/o error: rc == %d (should be 16)\n", rc);
	return -EREMOTEIO;
	}

	return 0;
	}

	static inline int tea5761_signal(struct dvb_frontend fe, const char buffer)
	{
	struct tea5761_priv *priv = fe->tuner_priv;

	int signal = ((buffer[9] & TEA5761_TUNCHECK_LEV_MASK) << (13 - 4));

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

	return signal;
	}

	static inline int tea5761_stereo(struct dvb_frontend fe, const char buffer)
	{
	struct tea5761_priv *priv = fe->tuner_priv;

	int stereo = buffer[9] & TEA5761_TUNCHECK_STEREO;

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

	return (stereo ? V4L2_TUNER_SUB_STEREO : 0);
	}

	static int tea5761_get_status(struct dvb_frontend fe, u32 status)
	{
	unsigned char buffer[16];

	*status = 0;

	if (0 == tea5761_read_status(fe, buffer)) {
	if (tea5761_signal(fe, buffer))
	*status = TUNER_STATUS_LOCKED;
	if (tea5761_stereo(fe, buffer))
	*status \|= TUNER_STATUS_STEREO;
	}

	return 0;
	}

	static int tea5761_get_rf_strength(struct dvb_frontend fe, u16 strength)
	{
	unsigned char buffer[16];

	*strength = 0;

	if (0 == tea5761_read_status(fe, buffer))
	*strength = tea5761_signal(fe, buffer);

	return 0;
	}

	int tea5761_autodetection(struct i2c_adapter* i2c_adap, u8 i2c_addr)
	{
	unsigned char buffer[16];
	int rc;
	struct tuner_i2c_props i2c = { .adap = i2c_adap, .addr = i2c_addr };

	if (16 != (rc = tuner_i2c_xfer_recv(&i2c, buffer, 16))) {
	printk(KERN_WARNING "it is not a TEA5761. Received %i chars.\n", rc);
	return -EINVAL;
	}

	if ((buffer[13] != 0x2b) \|\| (buffer[14] != 0x57) \|\| (buffer[15] != 0x061)) {
	printk(KERN_WARNING "Manufacturer ID= 0x%02x, Chip ID = %02x%02x."
	" It is not a TEA5761\n",
	buffer[13], buffer[14], buffer[15]);
	return -EINVAL;
	}
	printk(KERN_WARNING "tea5761: TEA%02x%02x detected. "
	"Manufacturer ID= 0x%02x\n",
	buffer[14], buffer[15], buffer[13]);

	return 0;
	}

	static int tea5761_release(struct dvb_frontend *fe)
	{
	kfree(fe->tuner_priv);
	fe->tuner_priv = NULL;

	return 0;
	}

	static int tea5761_get_frequency(struct dvb_frontend fe, u32 frequency)
	{
	struct tea5761_priv *priv = fe->tuner_priv;
	*frequency = priv->frequency;
	return 0;
	}

	static struct dvb_tuner_ops tea5761_tuner_ops = {
	.info = {
	.name = "tea5761", // Philips TEA5761HN FM Radio
	},
	.set_analog_params = set_radio_freq,
	.release = tea5761_release,
	.get_frequency = tea5761_get_frequency,
	.get_status = tea5761_get_status,
	.get_rf_strength = tea5761_get_rf_strength,
	};

	struct dvb_frontend tea5761_attach(struct dvb_frontend fe,
	struct i2c_adapter* i2c_adap,
	u8 i2c_addr)
	{
	struct tea5761_priv *priv = NULL;

	if (tea5761_autodetection(i2c_adap, i2c_addr) != 0)
	return NULL;

	priv = kzalloc(sizeof(struct tea5761_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 = "tea5761";

	memcpy(&fe->ops.tuner_ops, &tea5761_tuner_ops,
	sizeof(struct dvb_tuner_ops));

	tuner_info("type set to %s\n", "Philips TEA5761HN FM Radio");

	return fe;
	}


	EXPORT_SYMBOL_GPL(tea5761_attach);
	EXPORT_SYMBOL_GPL(tea5761_autodetection);

	MODULE_DESCRIPTION("Philips TEA5761 FM tuner driver");
	MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
	MODULE_LICENSE("GPL");