drivers/media/video/tuner-simple.c - kernel/msm - Gitiles

 /*
  *
  * i2c tv tuner chip device driver
  * controls all those simple 4-control-bytes style tuners.
  */
 #include <linux/delay.h>
 #include <linux/i2c.h>
 #include <linux/videodev.h>
 #include <media/tuner.h>

 static int offset = 0;
 module_param(offset, int, 0666);
 MODULE_PARM_DESC(offset,"Allows to specify an offset for tuner");

 /* ---------------------------------------------------------------------- */

 /* tv standard selection for Temic 4046 FM5
    this value takes the low bits of control byte 2
    from datasheet Rev.01, Feb.00
      standard     BG      I       L       L2      D
      picture IF   38.9    38.9    38.9    33.95   38.9
      sound 1      33.4    32.9    32.4    40.45   32.4
      sound 2      33.16
      NICAM        33.05   32.348  33.05           33.05
  */
 #define TEMIC_SET_PAL_I         0x05
 #define TEMIC_SET_PAL_DK        0x09
 #define TEMIC_SET_PAL_L         0x0a // SECAM ?
 #define TEMIC_SET_PAL_L2        0x0b // change IF !
 #define TEMIC_SET_PAL_BG        0x0c

 /* tv tuner system standard selection for Philips FQ1216ME
    this value takes the low bits of control byte 2
    from datasheet "1999 Nov 16" (supersedes "1999 Mar 23")
      standard 		BG	DK	I	L	L`
      picture carrier	38.90	38.90	38.90	38.90	33.95
      colour		34.47	34.47	34.47	34.47	38.38
      sound 1		33.40	32.40	32.90	32.40	40.45
      sound 2		33.16	-	-	-	-
      NICAM		33.05	33.05	32.35	33.05	39.80
  */
 #define PHILIPS_SET_PAL_I	0x01 /* Bit 2 always zero !*/
 #define PHILIPS_SET_PAL_BGDK	0x09
 #define PHILIPS_SET_PAL_L2	0x0a
 #define PHILIPS_SET_PAL_L	0x0b

 /* system switching for Philips FI1216MF MK2
    from datasheet "1996 Jul 09",
     standard         BG     L      L'
     picture carrier  38.90  38.90  33.95
     colour	     34.47  34.37  38.38
     sound 1          33.40  32.40  40.45
     sound 2          33.16  -      -
     NICAM            33.05  33.05  39.80
  */
 #define PHILIPS_MF_SET_BG	0x01 /* Bit 2 must be zero, Bit 3 is system output */
 #define PHILIPS_MF_SET_PAL_L	0x03 // France
 #define PHILIPS_MF_SET_PAL_L2	0x02 // L'

 /* Control byte */

 #define TUNER_RATIO_MASK        0x06 /* Bit cb1:cb2 */
 #define TUNER_RATIO_SELECT_50   0x00
 #define TUNER_RATIO_SELECT_32   0x02
 #define TUNER_RATIO_SELECT_166  0x04
 #define TUNER_RATIO_SELECT_62   0x06

 #define TUNER_CHARGE_PUMP       0x40  /* Bit cb6 */

 /* Status byte */

 #define TUNER_POR	  0x80
 #define TUNER_FL          0x40
 #define TUNER_MODE        0x38
 #define TUNER_AFC         0x07
 #define TUNER_SIGNAL      0x07
 #define TUNER_STEREO      0x10

 #define TUNER_PLL_LOCKED   0x40
 #define TUNER_STEREO_MK3   0x04

 #define TUNER_PARAM_ANALOG 0  /* to be removed */
 /* FIXME:
  * Right now, all tuners are using the first tuner_params[] array element
  * for analog mode. In the future, we will be merging similar tuner
  * definitions together, such that each tuner definition will have a
  * tuner_params struct for each available video standard. At that point,
  * TUNER_PARAM_ANALOG will be removed, and the tuner_params[] array
  * element will be chosen based on the video standard in use.
  *
  */

 /* ---------------------------------------------------------------------- */

 static int tuner_getstatus(struct i2c_client *c)
 {
 	unsigned char byte;

 	if (1 != i2c_master_recv(c,&byte,1))
 		return 0;

 	return byte;
 }

 static int tuner_signal(struct i2c_client *c)
 {
 	return (tuner_getstatus(c) & TUNER_SIGNAL) << 13;
 }

 static int tuner_stereo(struct i2c_client *c)
 {
 	int stereo, status;
 	struct tuner *t = i2c_get_clientdata(c);

 	status = tuner_getstatus (c);

 	switch (t->type) {
 		case TUNER_PHILIPS_FM1216ME_MK3:
     		case TUNER_PHILIPS_FM1236_MK3:
 		case TUNER_PHILIPS_FM1256_IH3:
 			stereo = ((status & TUNER_SIGNAL) == TUNER_STEREO_MK3);
 			break;
 		default:
 			stereo = status & TUNER_STEREO;
 	}

 	return stereo;
 }


 /* ---------------------------------------------------------------------- */

 static void default_set_tv_freq(struct i2c_client *c, unsigned int freq)
 {
 	struct tuner *t = i2c_get_clientdata(c);
 	u8 config, tuneraddr;
 	u16 div;
 	struct tunertype *tun;
 	unsigned char buffer[4];
 	int rc, IFPCoff, i, j;

 	tun = &tuners[t->type];
 	j = TUNER_PARAM_ANALOG;

 	for (i = 0; i < tun->params[j].count; i++) {
 		if (freq > tun->params[j].ranges[i].limit)
 			continue;
 		break;
 	}
 	config = tun->params[j].ranges[i].cb;
 	/*  i == 0 -> VHF_LO  */
 	/*  i == 1 -> VHF_HI  */
 	/*  i == 2 -> UHF     */
 	tuner_dbg("tv: range %d\n",i);

 	/* tv norm specific stuff for multi-norm tuners */
 	switch (t->type) {
 	case TUNER_PHILIPS_SECAM: // FI1216MF
 		/* 0x01 -> ??? no change ??? */
 		/* 0x02 -> PAL BDGHI / SECAM L */
 		/* 0x04 -> ??? PAL others / SECAM others ??? */
 		config &= ~0x02;
 		if (t->std & V4L2_STD_SECAM)
 			config |= 0x02;
 		break;

 	case TUNER_TEMIC_4046FM5:
 		config &= ~0x0f;

 		if (t->std & V4L2_STD_PAL_BG) {
 			config |= TEMIC_SET_PAL_BG;

 		} else if (t->std & V4L2_STD_PAL_I) {
 			config |= TEMIC_SET_PAL_I;

 		} else if (t->std & V4L2_STD_PAL_DK) {
 			config |= TEMIC_SET_PAL_DK;

 		} else if (t->std & V4L2_STD_SECAM_L) {
 			config |= TEMIC_SET_PAL_L;

 		}
 		break;

 	case TUNER_PHILIPS_FQ1216ME:
 		config &= ~0x0f;

 		if (t->std & (V4L2_STD_PAL_BG|V4L2_STD_PAL_DK)) {
 			config |= PHILIPS_SET_PAL_BGDK;

 		} else if (t->std & V4L2_STD_PAL_I) {
 			config |= PHILIPS_SET_PAL_I;

 		} else if (t->std & V4L2_STD_SECAM_L) {
 			config |= PHILIPS_SET_PAL_L;

 		}
 		break;

 	case TUNER_PHILIPS_ATSC:
 		/* 0x00 -> ATSC antenna input 1 */
 		/* 0x01 -> ATSC antenna input 2 */
 		/* 0x02 -> NTSC antenna input 1 */
 		/* 0x03 -> NTSC antenna input 2 */
 		config &= ~0x03;
 		if (!(t->std & V4L2_STD_ATSC))
 			config |= 2;
 		/* FIXME: input */
 		break;

 	case TUNER_MICROTUNE_4042FI5:
 		/* Set the charge pump for fast tuning */
 		tun->params[j].config |= TUNER_CHARGE_PUMP;
 		break;

 	case TUNER_PHILIPS_TUV1236D:
 		/* 0x40 -> ATSC antenna input 1 */
 		/* 0x48 -> ATSC antenna input 2 */
 		/* 0x00 -> NTSC antenna input 1 */
 		/* 0x08 -> NTSC antenna input 2 */
 		buffer[0] = 0x14;
 		buffer[1] = 0x00;
 		buffer[2] = 0x17;
 		buffer[3] = 0x00;
 		config &= ~0x40;
 		if (t->std & V4L2_STD_ATSC) {
 			config |= 0x40;
 			buffer[1] = 0x04;
 		}
 		/* set to the correct mode (analog or digital) */
 		tuneraddr = c->addr;
 		c->addr = 0x0a;
 		if (2 != (rc = i2c_master_send(c,&buffer[0],2)))
 			tuner_warn("i2c i/o error: rc == %d (should be 2)\n",rc);
 		if (2 != (rc = i2c_master_send(c,&buffer[2],2)))
 			tuner_warn("i2c i/o error: rc == %d (should be 2)\n",rc);
 		c->addr = tuneraddr;
 		/* FIXME: input */
 		break;
 	}

 	/*
 	 * Philips FI1216MK2 remark from specification :
 	 * for channel selection involving band switching, and to ensure
 	 * smooth tuning to the desired channel without causing
 	 * unnecessary charge pump action, it is recommended to consider
 	 * the difference between wanted channel frequency and the
 	 * current channel frequency.  Unnecessary charge pump action
 	 * will result in very low tuning voltage which may drive the
 	 * oscillator to extreme conditions.
 	 *
 	 * Progfou: specification says to send config data before
 	 * frequency in case (wanted frequency < current frequency).
 	 */

 	/* IFPCoff = Video Intermediate Frequency - Vif:
 		940  =16*58.75  NTSC/J (Japan)
 		732  =16*45.75  M/N STD
 		704  =16*44     ATSC (at DVB code)
 		632  =16*39.50  I U.K.
 		622.4=16*38.90  B/G D/K I, L STD
 		592  =16*37.00  D China
 		590  =16.36.875 B Australia
 		543.2=16*33.95  L' STD
 		171.2=16*10.70  FM Radio (at set_radio_freq)
 	*/

 	if (t->std == V4L2_STD_NTSC_M_JP) {
 		IFPCoff = 940;
 	} else if ((t->std & V4L2_STD_MN) &&
 		  !(t->std & ~V4L2_STD_MN)) {
 		IFPCoff = 732;
 	} else if (t->std == V4L2_STD_SECAM_LC) {
 		IFPCoff = 543;
 	} else {
 		IFPCoff = 623;
 	}

 	div=freq + IFPCoff + offset;

 	tuner_dbg("Freq= %d.%02d MHz, V_IF=%d.%02d MHz, Offset=%d.%02d MHz, div=%0d\n",
 					freq / 16, freq % 16 * 100 / 16,
 					IFPCoff / 16, IFPCoff % 16 * 100 / 16,
 					offset / 16, offset % 16 * 100 / 16,
 					div);

 	if (t->type == TUNER_PHILIPS_SECAM && freq < t->freq) {
 		buffer[0] = tun->params[j].config;
 		buffer[1] = config;
 		buffer[2] = (div>>8) & 0x7f;
 		buffer[3] = div      & 0xff;
 	} else {
 		buffer[0] = (div>>8) & 0x7f;
 		buffer[1] = div      & 0xff;
 		buffer[2] = tun->params[j].config;
 		buffer[3] = config;
 	}
 	tuner_dbg("tv 0x%02x 0x%02x 0x%02x 0x%02x\n",
 		  buffer[0],buffer[1],buffer[2],buffer[3]);

 	if (4 != (rc = i2c_master_send(c,buffer,4)))
 		tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc);

 	if (t->type == TUNER_MICROTUNE_4042FI5) {
 		// FIXME - this may also work for other tuners
 		unsigned long timeout = jiffies + msecs_to_jiffies(1);
 		u8 status_byte = 0;

 		/* Wait until the PLL locks */
 		for (;;) {
 			if (time_after(jiffies,timeout))
 				return;
 			if (1 != (rc = i2c_master_recv(c,&status_byte,1))) {
 				tuner_warn("i2c i/o read error: rc == %d (should be 1)\n",rc);
 				break;
 			}
 			if (status_byte & TUNER_PLL_LOCKED)
 				break;
 			udelay(10);
 		}

 		/* Set the charge pump for optimized phase noise figure */
 		tun->params[j].config &= ~TUNER_CHARGE_PUMP;
 		buffer[0] = (div>>8) & 0x7f;
 		buffer[1] = div      & 0xff;
 		buffer[2] = tun->params[j].config;
 		buffer[3] = config;
 		tuner_dbg("tv 0x%02x 0x%02x 0x%02x 0x%02x\n",
 		       buffer[0],buffer[1],buffer[2],buffer[3]);

 		if (4 != (rc = i2c_master_send(c,buffer,4)))
 			tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc);
 	}
 }

 static void default_set_radio_freq(struct i2c_client *c, unsigned int freq)
 {
 	struct tunertype *tun;
 	struct tuner *t = i2c_get_clientdata(c);
 	unsigned char buffer[4];
 	unsigned div;
 	int rc, j;

 	tun = &tuners[t->type];
 	j = TUNER_PARAM_ANALOG;

 	div = (20 * freq / 16000) + (int)(20*10.7); /* IF 10.7 MHz */
 	buffer[2] = (tun->params[j].config & ~TUNER_RATIO_MASK) | TUNER_RATIO_SELECT_50; /* 50 kHz step */

 	switch (t->type) {
 	case TUNER_TENA_9533_DI:
 	case TUNER_YMEC_TVF_5533MF:
 		tuner_dbg ("This tuner doesn't have FM. Most cards has a TEA5767 for FM\n");
 		return;
 	case TUNER_PHILIPS_FM1216ME_MK3:
 	case TUNER_PHILIPS_FM1236_MK3:
 	case TUNER_PHILIPS_FMD1216ME_MK3:
 		buffer[3] = 0x19;
 		break;
 	case TUNER_PHILIPS_FM1256_IH3:
 		div = (20 * freq) / 16000 + (int)(33.3 * 20);  /* IF 33.3 MHz */
 		buffer[3] = 0x19;
 		break;
 	case TUNER_LG_PAL_FM:
 		buffer[3] = 0xa5;
 		break;
 	case TUNER_MICROTUNE_4049FM5:
 		div = (20 * freq) / 16000 + (int)(33.3 * 20); /* IF 33.3 MHz */
 		buffer[3] = 0xa4;
 		break;
 	default:
 		buffer[3] = 0xa4;
 		break;
 	}
 	buffer[0] = (div>>8) & 0x7f;
 	buffer[1] = div      & 0xff;

 	tuner_dbg("radio 0x%02x 0x%02x 0x%02x 0x%02x\n",
 	       buffer[0],buffer[1],buffer[2],buffer[3]);

 	if (4 != (rc = i2c_master_send(c,buffer,4)))
 		tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc);
 }

 int default_tuner_init(struct i2c_client *c)
 {
 	struct tuner *t = i2c_get_clientdata(c);

 	tuner_info("type set to %d (%s)\n",
 		   t->type, tuners[t->type].name);
 	strlcpy(c->name, tuners[t->type].name, sizeof(c->name));

 	t->tv_freq    = default_set_tv_freq;
 	t->radio_freq = default_set_radio_freq;
 	t->has_signal = tuner_signal;
 	t->is_stereo  = tuner_stereo;
 	t->standby = NULL;

 	return 0;
 }

 /*
  * Overrides for Emacs so that we follow Linus's tabbing style.
  * ---------------------------------------------------------------------------
  * Local variables:
  * c-basic-offset: 8
  * End:
  */
	/*
	*
	* i2c tv tuner chip device driver
	* controls all those simple 4-control-bytes style tuners.
	*/
	#include <linux/delay.h>
	#include <linux/i2c.h>
	#include <linux/videodev.h>
	#include <media/tuner.h>

	static int offset = 0;
	module_param(offset, int, 0666);
	MODULE_PARM_DESC(offset,"Allows to specify an offset for tuner");

	/* ---------------------------------------------------------------------- */

	/* tv standard selection for Temic 4046 FM5
	this value takes the low bits of control byte 2
	from datasheet Rev.01, Feb.00
	standard BG I L L2 D
	picture IF 38.9 38.9 38.9 33.95 38.9
	sound 1 33.4 32.9 32.4 40.45 32.4
	sound 2 33.16
	NICAM 33.05 32.348 33.05 33.05
	*/
	#define TEMIC_SET_PAL_I 0x05
	#define TEMIC_SET_PAL_DK 0x09
	#define TEMIC_SET_PAL_L 0x0a // SECAM ?
	#define TEMIC_SET_PAL_L2 0x0b // change IF !
	#define TEMIC_SET_PAL_BG 0x0c

	/* tv tuner system standard selection for Philips FQ1216ME
	this value takes the low bits of control byte 2
	from datasheet "1999 Nov 16" (supersedes "1999 Mar 23")
	standard BG DK I L L`
	picture carrier 38.90 38.90 38.90 38.90 33.95
	colour 34.47 34.47 34.47 34.47 38.38
	sound 1 33.40 32.40 32.90 32.40 40.45
	sound 2 33.16 - - - -
	NICAM 33.05 33.05 32.35 33.05 39.80
	*/
	#define PHILIPS_SET_PAL_I 0x01 /* Bit 2 always zero !*/
	#define PHILIPS_SET_PAL_BGDK 0x09
	#define PHILIPS_SET_PAL_L2 0x0a
	#define PHILIPS_SET_PAL_L 0x0b

	/* system switching for Philips FI1216MF MK2
	from datasheet "1996 Jul 09",
	standard BG L L'
	picture carrier 38.90 38.90 33.95
	colour 34.47 34.37 38.38
	sound 1 33.40 32.40 40.45
	sound 2 33.16 - -
	NICAM 33.05 33.05 39.80
	*/
	#define PHILIPS_MF_SET_BG 0x01 /* Bit 2 must be zero, Bit 3 is system output */
	#define PHILIPS_MF_SET_PAL_L 0x03 // France
	#define PHILIPS_MF_SET_PAL_L2 0x02 // L'

	/* Control byte */

	#define TUNER_RATIO_MASK 0x06 /* Bit cb1:cb2 */
	#define TUNER_RATIO_SELECT_50 0x00
	#define TUNER_RATIO_SELECT_32 0x02
	#define TUNER_RATIO_SELECT_166 0x04
	#define TUNER_RATIO_SELECT_62 0x06

	#define TUNER_CHARGE_PUMP 0x40 /* Bit cb6 */

	/* Status byte */

	#define TUNER_POR 0x80
	#define TUNER_FL 0x40
	#define TUNER_MODE 0x38
	#define TUNER_AFC 0x07
	#define TUNER_SIGNAL 0x07
	#define TUNER_STEREO 0x10

	#define TUNER_PLL_LOCKED 0x40
	#define TUNER_STEREO_MK3 0x04

	#define TUNER_PARAM_ANALOG 0 /* to be removed */
	/* FIXME:
	* Right now, all tuners are using the first tuner_params[] array element
	* for analog mode. In the future, we will be merging similar tuner
	* definitions together, such that each tuner definition will have a
	* tuner_params struct for each available video standard. At that point,
	* TUNER_PARAM_ANALOG will be removed, and the tuner_params[] array
	* element will be chosen based on the video standard in use.
	*
	*/

	/* ---------------------------------------------------------------------- */

	static int tuner_getstatus(struct i2c_client *c)
	{
	unsigned char byte;

	if (1 != i2c_master_recv(c,&byte,1))
	return 0;

	return byte;
	}

	static int tuner_signal(struct i2c_client *c)
	{
	return (tuner_getstatus(c) & TUNER_SIGNAL) << 13;
	}

	static int tuner_stereo(struct i2c_client *c)
	{
	int stereo, status;
	struct tuner *t = i2c_get_clientdata(c);

	status = tuner_getstatus (c);

	switch (t->type) {
	case TUNER_PHILIPS_FM1216ME_MK3:
	case TUNER_PHILIPS_FM1236_MK3:
	case TUNER_PHILIPS_FM1256_IH3:
	stereo = ((status & TUNER_SIGNAL) == TUNER_STEREO_MK3);
	break;
	default:
	stereo = status & TUNER_STEREO;
	}

	return stereo;
	}


	/* ---------------------------------------------------------------------- */

	static void default_set_tv_freq(struct i2c_client *c, unsigned int freq)
	{
	struct tuner *t = i2c_get_clientdata(c);
	u8 config, tuneraddr;
	u16 div;
	struct tunertype *tun;
	unsigned char buffer[4];
	int rc, IFPCoff, i, j;

	tun = &tuners[t->type];
	j = TUNER_PARAM_ANALOG;

	for (i = 0; i < tun->params[j].count; i++) {
	if (freq > tun->params[j].ranges[i].limit)
	continue;
	break;
	}
	config = tun->params[j].ranges[i].cb;
	/* i == 0 -> VHF_LO */
	/* i == 1 -> VHF_HI */
	/* i == 2 -> UHF */
	tuner_dbg("tv: range %d\n",i);

	/* tv norm specific stuff for multi-norm tuners */
	switch (t->type) {
	case TUNER_PHILIPS_SECAM: // FI1216MF
	/* 0x01 -> ??? no change ??? */
	/* 0x02 -> PAL BDGHI / SECAM L */
	/* 0x04 -> ??? PAL others / SECAM others ??? */
	config &= ~0x02;
	if (t->std & V4L2_STD_SECAM)
	config \|= 0x02;
	break;

	case TUNER_TEMIC_4046FM5:
	config &= ~0x0f;

	if (t->std & V4L2_STD_PAL_BG) {
	config \|= TEMIC_SET_PAL_BG;

	} else if (t->std & V4L2_STD_PAL_I) {
	config \|= TEMIC_SET_PAL_I;

	} else if (t->std & V4L2_STD_PAL_DK) {
	config \|= TEMIC_SET_PAL_DK;

	} else if (t->std & V4L2_STD_SECAM_L) {
	config \|= TEMIC_SET_PAL_L;

	}
	break;

	case TUNER_PHILIPS_FQ1216ME:
	config &= ~0x0f;

	if (t->std & (V4L2_STD_PAL_BG\|V4L2_STD_PAL_DK)) {
	config \|= PHILIPS_SET_PAL_BGDK;

	} else if (t->std & V4L2_STD_PAL_I) {
	config \|= PHILIPS_SET_PAL_I;

	} else if (t->std & V4L2_STD_SECAM_L) {
	config \|= PHILIPS_SET_PAL_L;

	}
	break;

	case TUNER_PHILIPS_ATSC:
	/* 0x00 -> ATSC antenna input 1 */
	/* 0x01 -> ATSC antenna input 2 */
	/* 0x02 -> NTSC antenna input 1 */
	/* 0x03 -> NTSC antenna input 2 */
	config &= ~0x03;
	if (!(t->std & V4L2_STD_ATSC))
	config \|= 2;
	/* FIXME: input */
	break;

	case TUNER_MICROTUNE_4042FI5:
	/* Set the charge pump for fast tuning */
	tun->params[j].config \|= TUNER_CHARGE_PUMP;
	break;

	case TUNER_PHILIPS_TUV1236D:
	/* 0x40 -> ATSC antenna input 1 */
	/* 0x48 -> ATSC antenna input 2 */
	/* 0x00 -> NTSC antenna input 1 */
	/* 0x08 -> NTSC antenna input 2 */
	buffer[0] = 0x14;
	buffer[1] = 0x00;
	buffer[2] = 0x17;
	buffer[3] = 0x00;
	config &= ~0x40;
	if (t->std & V4L2_STD_ATSC) {
	config \|= 0x40;
	buffer[1] = 0x04;
	}
	/* set to the correct mode (analog or digital) */
	tuneraddr = c->addr;
	c->addr = 0x0a;
	if (2 != (rc = i2c_master_send(c,&buffer[0],2)))
	tuner_warn("i2c i/o error: rc == %d (should be 2)\n",rc);
	if (2 != (rc = i2c_master_send(c,&buffer[2],2)))
	tuner_warn("i2c i/o error: rc == %d (should be 2)\n",rc);
	c->addr = tuneraddr;
	/* FIXME: input */
	break;
	}

	/*
	* Philips FI1216MK2 remark from specification :
	* for channel selection involving band switching, and to ensure
	* smooth tuning to the desired channel without causing
	* unnecessary charge pump action, it is recommended to consider
	* the difference between wanted channel frequency and the
	* current channel frequency. Unnecessary charge pump action
	* will result in very low tuning voltage which may drive the
	* oscillator to extreme conditions.
	*
	* Progfou: specification says to send config data before
	* frequency in case (wanted frequency < current frequency).
	*/

	/* IFPCoff = Video Intermediate Frequency - Vif:
	940 =16*58.75 NTSC/J (Japan)
	732 =16*45.75 M/N STD
	704 =16*44 ATSC (at DVB code)
	632 =16*39.50 I U.K.
	622.4=16*38.90 B/G D/K I, L STD
	592 =16*37.00 D China
	590 =16.36.875 B Australia
	543.2=16*33.95 L' STD
	171.2=16*10.70 FM Radio (at set_radio_freq)
	*/

	if (t->std == V4L2_STD_NTSC_M_JP) {
	IFPCoff = 940;
	} else if ((t->std & V4L2_STD_MN) &&
	!(t->std & ~V4L2_STD_MN)) {
	IFPCoff = 732;
	} else if (t->std == V4L2_STD_SECAM_LC) {
	IFPCoff = 543;
	} else {
	IFPCoff = 623;
	}

	div=freq + IFPCoff + offset;

	tuner_dbg("Freq= %d.%02d MHz, V_IF=%d.%02d MHz, Offset=%d.%02d MHz, div=%0d\n",
	freq / 16, freq % 16 * 100 / 16,
	IFPCoff / 16, IFPCoff % 16 * 100 / 16,
	offset / 16, offset % 16 * 100 / 16,
	div);

	if (t->type == TUNER_PHILIPS_SECAM && freq < t->freq) {
	buffer[0] = tun->params[j].config;
	buffer[1] = config;
	buffer[2] = (div>>8) & 0x7f;
	buffer[3] = div & 0xff;
	} else {
	buffer[0] = (div>>8) & 0x7f;
	buffer[1] = div & 0xff;
	buffer[2] = tun->params[j].config;
	buffer[3] = config;
	}
	tuner_dbg("tv 0x%02x 0x%02x 0x%02x 0x%02x\n",
	buffer[0],buffer[1],buffer[2],buffer[3]);

	if (4 != (rc = i2c_master_send(c,buffer,4)))
	tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc);

	if (t->type == TUNER_MICROTUNE_4042FI5) {
	// FIXME - this may also work for other tuners
	unsigned long timeout = jiffies + msecs_to_jiffies(1);
	u8 status_byte = 0;

	/* Wait until the PLL locks */
	for (;;) {
	if (time_after(jiffies,timeout))
	return;
	if (1 != (rc = i2c_master_recv(c,&status_byte,1))) {
	tuner_warn("i2c i/o read error: rc == %d (should be 1)\n",rc);
	break;
	}
	if (status_byte & TUNER_PLL_LOCKED)
	break;
	udelay(10);
	}

	/* Set the charge pump for optimized phase noise figure */
	tun->params[j].config &= ~TUNER_CHARGE_PUMP;
	buffer[0] = (div>>8) & 0x7f;
	buffer[1] = div & 0xff;
	buffer[2] = tun->params[j].config;
	buffer[3] = config;
	tuner_dbg("tv 0x%02x 0x%02x 0x%02x 0x%02x\n",
	buffer[0],buffer[1],buffer[2],buffer[3]);

	if (4 != (rc = i2c_master_send(c,buffer,4)))
	tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc);
	}
	}

	static void default_set_radio_freq(struct i2c_client *c, unsigned int freq)
	{
	struct tunertype *tun;
	struct tuner *t = i2c_get_clientdata(c);
	unsigned char buffer[4];
	unsigned div;
	int rc, j;

	tun = &tuners[t->type];
	j = TUNER_PARAM_ANALOG;

	div = (20 * freq / 16000) + (int)(2010.7); / IF 10.7 MHz */
	buffer[2] = (tun->params[j].config & ~TUNER_RATIO_MASK) \| TUNER_RATIO_SELECT_50; /* 50 kHz step */

	switch (t->type) {
	case TUNER_TENA_9533_DI:
	case TUNER_YMEC_TVF_5533MF:
	tuner_dbg ("This tuner doesn't have FM. Most cards has a TEA5767 for FM\n");
	return;
	case TUNER_PHILIPS_FM1216ME_MK3:
	case TUNER_PHILIPS_FM1236_MK3:
	case TUNER_PHILIPS_FMD1216ME_MK3:
	buffer[3] = 0x19;
	break;
	case TUNER_PHILIPS_FM1256_IH3:
	div = (20 * freq) / 16000 + (int)(33.3 * 20); /* IF 33.3 MHz */
	buffer[3] = 0x19;
	break;
	case TUNER_LG_PAL_FM:
	buffer[3] = 0xa5;
	break;
	case TUNER_MICROTUNE_4049FM5:
	div = (20 * freq) / 16000 + (int)(33.3 * 20); /* IF 33.3 MHz */
	buffer[3] = 0xa4;
	break;
	default:
	buffer[3] = 0xa4;
	break;
	}
	buffer[0] = (div>>8) & 0x7f;
	buffer[1] = div & 0xff;

	tuner_dbg("radio 0x%02x 0x%02x 0x%02x 0x%02x\n",
	buffer[0],buffer[1],buffer[2],buffer[3]);

	if (4 != (rc = i2c_master_send(c,buffer,4)))
	tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc);
	}

	int default_tuner_init(struct i2c_client *c)
	{
	struct tuner *t = i2c_get_clientdata(c);

	tuner_info("type set to %d (%s)\n",
	t->type, tuners[t->type].name);
	strlcpy(c->name, tuners[t->type].name, sizeof(c->name));

	t->tv_freq = default_set_tv_freq;
	t->radio_freq = default_set_radio_freq;
	t->has_signal = tuner_signal;
	t->is_stereo = tuner_stereo;
	t->standby = NULL;

	return 0;
	}

	/*
	* Overrides for Emacs so that we follow Linus's tabbing style.
	* ---------------------------------------------------------------------------
	* Local variables:
	* c-basic-offset: 8
	* End:
	*/