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/*
* 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/videodev.h>
#include <linux/delay.h>
#include <media/tuner.h>
#define PREFIX "TEA5761 "
/* from tuner-core.c */
extern int tuner_debug;
/*****************************************************************************/
/***************************
* 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 */
/*****************************************************************************/
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");
}
#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(PREFIX "Frequency %d.%03d KHz (divider = 0x%04x)\n",
frq / 1000, frq % 1000, div);
}
/* 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[7] = {0, 0, 0, 0, 0, 0, 0 };
unsigned div;
int rc;
tuner_dbg (PREFIX "radio freq counter %d\n", frq);
if (t->mode == T_STANDBY) {
tuner_dbg("TEA5761 set to standby mode\n");
buffer[5] |= TEA5761_TNCTRL_MU;
} else {
buffer[4] |= TEA5761_TNCTRL_PUPD_0;
}
if (t->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 (tuner_debug)
tea5761_status_dump(buffer);
if (7 != (rc = i2c_master_send(c, buffer, 7)))
tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
}
static int tea5761_signal(struct i2c_client *c)
{
unsigned char buffer[16];
int rc;
struct tuner *t = i2c_get_clientdata(c);
memset(buffer, 0, sizeof(buffer));
if (16 != (rc = i2c_master_recv(c, buffer, 16)))
tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
return ((buffer[9] & TEA5761_TUNCHECK_LEV_MASK) << (13 - 4));
}
static int tea5761_stereo(struct i2c_client *c)
{
unsigned char buffer[16];
int rc;
struct tuner *t = i2c_get_clientdata(c);
memset(buffer, 0, sizeof(buffer));
if (16 != (rc = i2c_master_recv(c, buffer, 16)))
tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
rc = buffer[9] & TEA5761_TUNCHECK_STEREO;
tuner_dbg("TEA5761 radio ST GET = %02x\n", rc);
return (rc ? V4L2_TUNER_SUB_STEREO : 0);
}
int tea5761_autodetection(struct i2c_client *c)
{
unsigned char buffer[16];
int rc;
struct tuner *t = i2c_get_clientdata(c);
if (16 != (rc = i2c_master_recv(c, buffer, 16))) {
tuner_warn("it is not a TEA5761. Received %i chars.\n", rc);
return EINVAL;
}
if (!((buffer[13] != 0x2b) || (buffer[14] != 0x57) || (buffer[15] != 0x061))) {
tuner_warn("Manufacturer ID= 0x%02x, Chip ID = %02x%02x. It is not a TEA5761\n",buffer[13],buffer[14],buffer[15]);
return EINVAL;
}
tuner_warn("TEA5761 detected.\n");
return 0;
}
int tea5761_tuner_init(struct i2c_client *c)
{
struct tuner *t = i2c_get_clientdata(c);
if (tea5761_autodetection(c) == EINVAL)
return EINVAL;
tuner_info("type set to %d (%s)\n", t->type, "Philips TEA5761HN FM Radio");
strlcpy(c->name, "tea5761", sizeof(c->name));
t->ops.set_tv_freq = set_tv_freq;
t->ops.set_radio_freq = set_radio_freq;
t->ops.has_signal = tea5761_signal;
t->ops.is_stereo = tea5761_stereo;
return (0);
}
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