mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 11:19:37 +00:00
![Mauro Carvalho Chehab](/assets/img/avatar_default.png)
From now on, I'll start using my @kernel.org as my development e-mail. As such, let's remove the entries that point to the old mchehab@s-opensource.com at MAINTAINERS file. For the files written with a copyright with mchehab@s-opensource, let's keep Samsung on their names, using mchehab+samsung@kernel.org, in order to keep pointing to my employer, with sponsors the work. For the files written before I join Samsung (on July, 4 2013), let's just use mchehab@kernel.org. For bug reports, we can simply point to just kernel.org, as this will reach my mchehab+samsung inbox anyway. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Brian Warner <brian.warner@samsung.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
341 lines
8.6 KiB
C
341 lines
8.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
// For Philips TEA5761 FM Chip
|
|
// I2C address is always 0x20 (0x10 at 7-bit mode).
|
|
//
|
|
// Copyright (c) 2005-2007 Mauro Carvalho Chehab <mchehab@kernel.org>
|
|
|
|
#include <linux/i2c.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/videodev2.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;
|
|
bool standby;
|
|
};
|
|
|
|
/*****************************************************************************/
|
|
|
|
/***************************
|
|
* 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,
|
|
unsigned int freq,
|
|
bool mono)
|
|
{
|
|
struct tea5761_priv *priv = fe->tuner_priv;
|
|
unsigned int frq = freq;
|
|
unsigned char buffer[7] = {0, 0, 0, 0, 0, 0, 0 };
|
|
unsigned div;
|
|
int rc;
|
|
|
|
tuner_dbg("radio freq counter %d\n", frq);
|
|
|
|
if (priv->standby) {
|
|
tuner_dbg("TEA5761 set to standby mode\n");
|
|
buffer[5] |= TEA5761_TNCTRL_MU;
|
|
} else {
|
|
buffer[4] |= TEA5761_TNCTRL_PUPD_0;
|
|
}
|
|
|
|
|
|
if (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 set_radio_freq(struct dvb_frontend *fe,
|
|
struct analog_parameters *params)
|
|
{
|
|
struct tea5761_priv *priv = fe->analog_demod_priv;
|
|
|
|
priv->standby = false;
|
|
|
|
return __set_radio_freq(fe, params->frequency,
|
|
params->audmode == V4L2_TUNER_MODE_MONO);
|
|
}
|
|
|
|
static int set_radio_sleep(struct dvb_frontend *fe)
|
|
{
|
|
struct tea5761_priv *priv = fe->analog_demod_priv;
|
|
|
|
priv->standby = true;
|
|
|
|
return __set_radio_freq(fe, priv->frequency, false);
|
|
}
|
|
|
|
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 void tea5761_release(struct dvb_frontend *fe)
|
|
{
|
|
kfree(fe->tuner_priv);
|
|
fe->tuner_priv = NULL;
|
|
}
|
|
|
|
static int tea5761_get_frequency(struct dvb_frontend *fe, u32 *frequency)
|
|
{
|
|
struct tea5761_priv *priv = fe->tuner_priv;
|
|
*frequency = priv->frequency;
|
|
return 0;
|
|
}
|
|
|
|
static const struct dvb_tuner_ops tea5761_tuner_ops = {
|
|
.info = {
|
|
.name = "tea5761", // Philips TEA5761HN FM Radio
|
|
},
|
|
.set_analog_params = set_radio_freq,
|
|
.sleep = set_radio_sleep,
|
|
.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@kernel.org>");
|
|
MODULE_LICENSE("GPL v2");
|