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/*
* i2c tv tuner chip device driver
* controls all those simple 4-control-bytes style tuners.
*
* This "tuner-simple" module was split apart from the original "tuner" module.
*/
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/videodev.h>
#include <media/tuner.h>
#include <media/v4l2-common.h>
#include <media/tuner-types.h>
#include "tuner-i2c.h"
#include "tuner-simple.h"
static int debug = 0;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "enable verbose debug messages");
#define PREFIX "tuner-simple "
static int offset = 0;
module_param(offset, int, 0664);
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_STD_BG 0x01 /* Bit 2 must be zero, Bit 3 is system output */
#define PHILIPS_MF_SET_STD_L 0x03 /* Used on Secam France */
#define PHILIPS_MF_SET_STD_LC 0x02 /* Used on SECAM 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
struct tuner_simple_priv {
u16 last_div;
struct tuner_i2c_props i2c_props;
unsigned int type;
struct tunertype *tun;
u32 frequency;
};
/* ---------------------------------------------------------------------- */
static int tuner_read_status(struct dvb_frontend *fe)
{
struct tuner_simple_priv *priv = fe->tuner_priv;
unsigned char byte;
if (1 != tuner_i2c_xfer_recv(&priv->i2c_props,&byte,1))
return 0;
return byte;
}
static inline int tuner_signal(const int status)
{
return (status & TUNER_SIGNAL) << 13;
}
static inline int tuner_stereo(const int type, const int status)
{
switch (type) {
case TUNER_PHILIPS_FM1216ME_MK3:
case TUNER_PHILIPS_FM1236_MK3:
case TUNER_PHILIPS_FM1256_IH3:
case TUNER_LG_NTSC_TAPE:
return ((status & TUNER_SIGNAL) == TUNER_STEREO_MK3);
default:
return status & TUNER_STEREO;
}
}
static inline int tuner_islocked(const int status)
{
return (status & TUNER_FL);
}
static inline int tuner_afcstatus(const int status)
{
return (status & TUNER_AFC) - 2;
}
static int simple_get_status(struct dvb_frontend *fe, u32 *status)
{
struct tuner_simple_priv *priv = fe->tuner_priv;
int tuner_status = tuner_read_status(fe);
*status = 0;
if (tuner_islocked(tuner_status))
*status = TUNER_STATUS_LOCKED;
if (tuner_stereo(priv->type, tuner_status))
*status |= TUNER_STATUS_STEREO;
tuner_dbg("AFC Status: %d\n", tuner_afcstatus(tuner_status));
return 0;
}
static int simple_get_rf_strength(struct dvb_frontend *fe, u16 *strength)
{
struct tuner_simple_priv *priv = fe->tuner_priv;
int signal = tuner_signal(tuner_read_status(fe));
*strength = signal;
tuner_dbg("Signal strength: %d\n", signal);
return 0;
}
/* ---------------------------------------------------------------------- */
static int simple_set_tv_freq(struct dvb_frontend *fe,
struct analog_parameters *params)
{
struct tuner_simple_priv *priv = fe->tuner_priv;
u8 config, cb, tuneraddr;
u16 div;
struct tunertype *tun;
u8 buffer[4];
int rc, IFPCoff, i, j;
enum param_type desired_type;
struct tuner_params *t_params;
tun = priv->tun;
/* 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 (params->std == V4L2_STD_NTSC_M_JP) {
IFPCoff = 940;
desired_type = TUNER_PARAM_TYPE_NTSC;
} else if ((params->std & V4L2_STD_MN) &&
!(params->std & ~V4L2_STD_MN)) {
IFPCoff = 732;
desired_type = TUNER_PARAM_TYPE_NTSC;
} else if (params->std == V4L2_STD_SECAM_LC) {
IFPCoff = 543;
desired_type = TUNER_PARAM_TYPE_SECAM;
} else {
IFPCoff = 623;
desired_type = TUNER_PARAM_TYPE_PAL;
}
for (j = 0; j < tun->count-1; j++) {
if (desired_type != tun->params[j].type)
continue;
break;
}
/* use default tuner_t_params if desired_type not available */
if (desired_type != tun->params[j].type) {
tuner_dbg("IFPCoff = %d: tuner_t_params undefined for tuner %d\n",
IFPCoff, priv->type);
j = 0;
}
t_params = &tun->params[j];
for (i = 0; i < t_params->count; i++) {
if (params->frequency > t_params->ranges[i].limit)
continue;
break;
}
if (i == t_params->count) {
tuner_dbg("TV frequency out of range (%d > %d)",
params->frequency, t_params->ranges[i - 1].limit);
params->frequency = t_params->ranges[--i].limit;
}
config = t_params->ranges[i].config;
cb = t_params->ranges[i].cb;
/* i == 0 -> VHF_LO
* i == 1 -> VHF_HI
* i == 2 -> UHF */
tuner_dbg("tv: param %d, range %d\n",j,i);
div=params->frequency + IFPCoff + offset;
tuner_dbg("Freq= %d.%02d MHz, V_IF=%d.%02d MHz, Offset=%d.%02d MHz, div=%0d\n",
params->frequency / 16, params->frequency % 16 * 100 / 16,
IFPCoff / 16, IFPCoff % 16 * 100 / 16,
offset / 16, offset % 16 * 100 / 16,
div);
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