// SPDX-License-Identifier: GPL-2.0-or-later
/*
* drivers / media / radio / si4713 - i2c . c
*
* Silicon Labs Si4713 FM Radio Transmitter I2C commands .
*
* Copyright ( c ) 2009 Nokia Corporation
* Contact : Eduardo Valentin < eduardo . valentin @ nokia . com >
*/
#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-common.h>
#include "si4713.h"
/* module parameters */
static int debug;
module_param(debug, int , S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug level (0 - 2)" );
MODULE_LICENSE("GPL" );
MODULE_AUTHOR("Eduardo Valentin <eduardo.valentin@nokia.com>" );
MODULE_DESCRIPTION("I2C driver for Si4713 FM Radio Transmitter" );
MODULE_VERSION("0.0.1" );
#define DEFAULT_RDS_PI 0 x00
#define DEFAULT_RDS_PTY 0 x00
#define DEFAULT_RDS_DEVIATION 0 x00C8
#define DEFAULT_RDS_PS_REPEAT_COUNT 0 x0003
#define DEFAULT_LIMITER_RTIME 0 x1392
#define DEFAULT_LIMITER_DEV 0 x102CA
#define DEFAULT_PILOT_FREQUENCY 0 x4A38
#define DEFAULT_PILOT_DEVIATION 0 x1A5E
#define DEFAULT_ACOMP_ATIME 0 x0000
#define DEFAULT_ACOMP_RTIME 0 xF4240L
#define DEFAULT_ACOMP_GAIN 0 x0F
#define DEFAULT_ACOMP_THRESHOLD (-0 x28)
#define DEFAULT_MUTE 0 x01
#define DEFAULT_POWER_LEVEL 88
#define DEFAULT_FREQUENCY 8800
#define DEFAULT_PREEMPHASIS FMPE_EU
#define DEFAULT_TUNE_RNL 0 xFF
#define to_si4713_device(sd) container_of(sd, struct si4713_device, sd)
/* frequency domain transformation (using times 10 to avoid floats) */
#define FREQDEV_UNIT 100000
#define FREQV4L2_MULTI 625
#define si4713_to_v4l2(f) ((f * FREQDEV_UNIT) / FREQV4L2_MULTI)
#define v4l2_to_si4713(f) ((f * FREQV4L2_MULTI) / FREQDEV_UNIT)
#define FREQ_RANGE_LOW 7600
#define FREQ_RANGE_HIGH 10800
#define MAX_ARGS 7
#define RDS_BLOCK 8
#define RDS_BLOCK_CLEAR 0 x03
#define RDS_BLOCK_LOAD 0 x04
#define RDS_RADIOTEXT_2A 0 x20
#define RDS_RADIOTEXT_BLK_SIZE 4
#define RDS_RADIOTEXT_INDEX_MAX 0 x0F
#define RDS_CARRIAGE_RETURN 0 x0D
#define rds_ps_nblocks(len) ((len / RDS_BLOCK) + (len % RDS_BLOCK ? 1 : 0 ))
#define get_status_bit(p, b, m) (((p) & (m)) >> (b))
#define set_bits(p, v, b, m) (((p) & ~(m)) | ((v) << (b)))
#define ATTACK_TIME_UNIT 500
#define POWER_OFF 0 x00
#define POWER_ON 0 x01
#define msb(x) ((u8)((u16) x >> 8 ))
#define lsb(x) ((u8)((u16) x & 0 x00FF))
#define compose_u16(msb, lsb) (((u16)msb << 8 ) | lsb)
#define check_command_failed(status) (!(status & SI4713_CTS) || \
(status & SI4713_ERR))
/* mute definition */
#define set_mute(p) (((p) & 1 ) | (((p) & 1 ) << 1 ))
#ifdef DEBUG
#define DBG_BUFFER(device, message, buffer, size) \
{ \
int i; \
char str[(size)*5 ]; \
for (i = 0 ; i < size; i++) \
sprintf(str + i * 5 , " 0x%02x" , buffer[i]); \
v4l2_dbg(2 , debug, device, "%s:%s\n" , message, str); \
}
#else
#define DBG_BUFFER(device, message, buffer, size)
#endif
/*
* Values for limiter release time ( sorted by second column )
* device release
* value time ( us )
*/
static long limiter_times[] = {
2000 , 250 ,
1000 , 500 ,
510 , 1000 ,
255 , 2000 ,
170 , 3000 ,
127 , 4020 ,
102 , 5010 ,
85 , 6020 ,
73 , 7010 ,
64 , 7990 ,
57 , 8970 ,
51 , 10030 ,
25 , 20470 ,
17 , 30110 ,
13 , 39380 ,
10 , 51190 ,
8 , 63690 ,
7 , 73140 ,
6 , 85330 ,
5 , 102390 ,
};
/*
* Values for audio compression release time ( sorted by second column )
* device release
* value time ( us )
*/
static unsigned long acomp_rtimes[] = {
0 , 100000 ,
1 , 200000 ,
2 , 350000 ,
3 , 525000 ,
4 , 1000000 ,
};
/*
* Values for preemphasis ( sorted by second column )
* device preemphasis
* value value ( v4l2 )
*/
static unsigned long preemphasis_values[] = {
FMPE_DISABLED, V4L2_PREEMPHASIS_DISABLED,
FMPE_EU, V4L2_PREEMPHASIS_50_uS,
FMPE_USA, V4L2_PREEMPHASIS_75_uS,
};
static int usecs_to_dev(unsigned long usecs, unsigned long const array[],
int size)
{
int i;
int rval = -EINVAL;
for (i = 0 ; i < size / 2 ; i++)
if (array[(i * 2 ) + 1 ] >= usecs) {
rval = array[i * 2 ];
break ;
}
return rval;
}
/* si4713_handler: IRQ handler, just complete work */
static irqreturn_t si4713_handler(int irq, void *dev)
{
struct si4713_device *sdev = dev;
v4l2_dbg(2 , debug, &sdev->sd,
"%s: sending signal to completion work.\n" , __func__);
complete(&sdev->work);
return IRQ_HANDLED;
}
/*
* si4713_send_command - sends a command to si4713 and waits its response
* @ sdev : si4713_device structure for the device we are communicating
* @ command : command id
* @ args : command arguments we are sending ( up to 7 )
* @ argn : actual size of @ args
* @ response : buffer to place the expected response from the device ( up to 15 )
* @ respn : actual size of @ response
* @ usecs : amount of time to wait before reading the response ( in usecs )
*/
static int si4713_send_command(struct si4713_device *sdev, const u8 command,
const u8 args[], const int argn,
u8 response[], const int respn, const int usecs)
{
struct i2c_client *client = v4l2_get_subdevdata(&sdev->sd);
unsigned long until_jiffies;
u8 data1[MAX_ARGS + 1 ];
int err;
if (!client->adapter)
return -ENODEV;
/* First send the command and its arguments */
data1[0 ] = command;
memcpy(data1 + 1 , args, argn);
DBG_BUFFER(&sdev->sd, "Parameters" , data1, argn + 1 );
err = i2c_master_send(client, data1, argn + 1 );
if (err != argn + 1 ) {
v4l2_err(&sdev->sd, "Error while sending command 0x%02x\n" ,
command);
return err < 0 ? err : -EIO;
}
until_jiffies = jiffies + usecs_to_jiffies(usecs) + 1 ;
/* Wait response from interrupt */
if (client->irq) {
if (!wait_for_completion_timeout(&sdev->work,
usecs_to_jiffies(usecs) + 1 ))
v4l2_warn(&sdev->sd,
"(%s) Device took too much time to answer.\n" ,
__func__);
}
do {
err = i2c_master_recv(client, response, respn);
if (err != respn) {
v4l2_err(&sdev->sd,
"Error %d while reading response for command 0x%02x\n" ,
err, command);
return err < 0 ? err : -EIO;
}
DBG_BUFFER(&sdev->sd, "Response" , response, respn);
if (!check_command_failed(response[0 ]))
return 0 ;
if (client->irq)
return -EBUSY;
if (usecs <= 1000 )
usleep_range(usecs, 1000 );
else
usleep_range(1000 , 2000 );
} while (time_is_after_jiffies(until_jiffies));
return -EBUSY;
}
/*
* si4713_read_property - reads a si4713 property
* @ sdev : si4713_device structure for the device we are communicating
* @ prop : property identification number
* @ pv : property value to be returned on success
*/
static int si4713_read_property(struct si4713_device *sdev, u16 prop, u32 *pv)
{
int err;
u8 val[SI4713_GET_PROP_NRESP];
/*
* . First byte = 0
* . Second byte = property ' s MSB
* . Third byte = property ' s LSB
*/
const u8 args[SI4713_GET_PROP_NARGS] = {
0 x00,
msb(prop),
lsb(prop),
};
err = si4713_send_command(sdev, SI4713_CMD_GET_PROPERTY,
args, ARRAY_SIZE(args), val,
ARRAY_SIZE(val), DEFAULT_TIMEOUT);
if (err < 0 )
return err;
*pv = compose_u16(val[2 ], val[3 ]);
v4l2_dbg(1 , debug, &sdev->sd,
"%s: property=0x%02x value=0x%02x status=0x%02x\n" ,
__func__, prop, *pv, val[0 ]);
return err;
}
/*
* si4713_write_property - modifies a si4713 property
* @ sdev : si4713_device structure for the device we are communicating
* @ prop : property identification number
* @ val : new value for that property
*/
static int si4713_write_property(struct si4713_device *sdev, u16 prop, u16 val)
{
int rval;
u8 resp[SI4713_SET_PROP_NRESP];
/*
* . First byte = 0
* . Second byte = property ' s MSB
* . Third byte = property ' s LSB
* . Fourth byte = value ' s MSB
* . Fifth byte = value ' s LSB
*/
const u8 args[SI4713_SET_PROP_NARGS] = {
0 x00,
msb(prop),
lsb(prop),
msb(val),
lsb(val),
};
rval = si4713_send_command(sdev, SI4713_CMD_SET_PROPERTY,
args, ARRAY_SIZE(args),
resp, ARRAY_SIZE(resp),
DEFAULT_TIMEOUT);
if (rval < 0 )
return rval;
v4l2_dbg(1 , debug, &sdev->sd,
"%s: property=0x%02x value=0x%02x status=0x%02x\n" ,
__func__, prop, val, resp[0 ]);
/*
* As there is no command response for SET_PROPERTY ,
* wait Tcomp time to finish before proceed , in order
* to have property properly set .
*/
msleep(TIMEOUT_SET_PROPERTY);
return rval;
}
/*
* si4713_powerup - Powers the device up
* @ sdev : si4713_device structure for the device we are communicating
*/
static int si4713_powerup(struct si4713_device *sdev)
{
struct i2c_client *client = v4l2_get_subdevdata(&sdev->sd);
int err;
u8 resp[SI4713_PWUP_NRESP];
/*
* . First byte = Enabled interrupts and boot function
* . Second byte = Input operation mode
*/
u8 args[SI4713_PWUP_NARGS] = {
SI4713_PWUP_GPO2OEN | SI4713_PWUP_FUNC_TX,
SI4713_PWUP_OPMOD_ANALOG,
};
if (sdev->power_state)
return 0 ;
if (sdev->vdd) {
err = regulator_enable(sdev->vdd);
if (err) {
v4l2_err(&sdev->sd, "Failed to enable vdd: %d\n" , err);
return err;
}
}
if (sdev->vio) {
err = regulator_enable(sdev->vio);
if (err) {
v4l2_err(&sdev->sd, "Failed to enable vio: %d\n" , err);
return err;
}
}
if (sdev->gpio_reset) {
udelay(50 );
gpiod_set_value(sdev->gpio_reset, 1 );
}
if (client->irq)
args[0 ] |= SI4713_PWUP_CTSIEN;
err = si4713_send_command(sdev, SI4713_CMD_POWER_UP,
args, ARRAY_SIZE(args),
resp, ARRAY_SIZE(resp),
TIMEOUT_POWER_UP);
if (!err) {
v4l2_dbg(1 , debug, &sdev->sd, "Powerup response: 0x%02x\n" ,
resp[0 ]);
v4l2_dbg(1 , debug, &sdev->sd, "Device in power up mode\n" );
sdev->power_state = POWER_ON;
if (client->irq)
err = si4713_write_property(sdev, SI4713_GPO_IEN,
SI4713_STC_INT | SI4713_CTS);
return err;
}
gpiod_set_value(sdev->gpio_reset, 0 );
if (sdev->vdd) {
err = regulator_disable(sdev->vdd);
if (err)
v4l2_err(&sdev->sd, "Failed to disable vdd: %d\n" , err);
}
if (sdev->vio) {
err = regulator_disable(sdev->vio);
if (err)
v4l2_err(&sdev->sd, "Failed to disable vio: %d\n" , err);
}
return err;
}
/*
* si4713_powerdown - Powers the device down
* @ sdev : si4713_device structure for the device we are communicating
*/
static int si4713_powerdown(struct si4713_device *sdev)
{
int err;
u8 resp[SI4713_PWDN_NRESP];
if (!sdev->power_state)
return 0 ;
err = si4713_send_command(sdev, SI4713_CMD_POWER_DOWN,
NULL, 0 ,
resp, ARRAY_SIZE(resp),
DEFAULT_TIMEOUT);
if (!err) {
v4l2_dbg(1 , debug, &sdev->sd, "Power down response: 0x%02x\n" ,
resp[0 ]);
v4l2_dbg(1 , debug, &sdev->sd, "Device in reset mode\n" );
if (sdev->gpio_reset)
gpiod_set_value(sdev->gpio_reset, 0 );
if (sdev->vdd) {
err = regulator_disable(sdev->vdd);
if (err) {
v4l2_err(&sdev->sd,
"Failed to disable vdd: %d\n" , err);
}
}
if (sdev->vio) {
err = regulator_disable(sdev->vio);
if (err) {
v4l2_err(&sdev->sd,
"Failed to disable vio: %d\n" , err);
}
}
sdev->power_state = POWER_OFF;
}
return err;
}
/*
* si4713_checkrev - Checks if we are treating a device with the correct rev .
* @ sdev : si4713_device structure for the device we are communicating
*/
static int si4713_checkrev(struct si4713_device *sdev)
{
struct i2c_client *client = v4l2_get_subdevdata(&sdev->sd);
int rval;
u8 resp[SI4713_GETREV_NRESP];
rval = si4713_send_command(sdev, SI4713_CMD_GET_REV,
NULL, 0 ,
resp, ARRAY_SIZE(resp),
DEFAULT_TIMEOUT);
if (rval < 0 )
return rval;
if (resp[1 ] == SI4713_PRODUCT_NUMBER) {
v4l2_info(&sdev->sd, "chip found @ 0x%02x (%s)\n" ,
client->addr << 1 , client->adapter->name);
} else {
v4l2_err(&sdev->sd, "Invalid product number 0x%X\n" , resp[1 ]);
rval = -EINVAL;
}
return rval;
}
/*
* si4713_wait_stc - Waits STC interrupt and clears status bits . Useful
* for TX_TUNE_POWER , TX_TUNE_FREQ and TX_TUNE_MEAS
* @ sdev : si4713_device structure for the device we are communicating
* @ usecs : timeout to wait for STC interrupt signal
*/
static int si4713_wait_stc(struct si4713_device *sdev, const int usecs)
{
struct i2c_client *client = v4l2_get_subdevdata(&sdev->sd);
u8 resp[SI4713_GET_STATUS_NRESP];
unsigned long start_jiffies = jiffies;
int err;
if (client->irq &&
!wait_for_completion_timeout(&sdev->work, usecs_to_jiffies(usecs) + 1 ))
v4l2_warn(&sdev->sd,
"(%s) Device took too much time to answer.\n" , __func__);
for (;;) {
/* Clear status bits */
err = si4713_send_command(sdev, SI4713_CMD_GET_INT_STATUS,
NULL, 0 ,
resp, ARRAY_SIZE(resp),
DEFAULT_TIMEOUT);
/* The USB device returns errors when it waits for the
* STC bit to be set. Hence polling */
if (err >= 0 ) {
v4l2_dbg(1 , debug, &sdev->sd,
"%s: status bits: 0x%02x\n" , __func__, resp[0 ]);
if (resp[0 ] & SI4713_STC_INT)
return 0 ;
}
if (jiffies_to_usecs(jiffies - start_jiffies) > usecs)
return err < 0 ? err : -EIO;
/* We sleep here for 3-4 ms in order to avoid flooding the device
* with USB requests . The si4713 USB driver was developed
* by reverse engineering the Windows USB driver . The windows
* driver also has a ~2.5 ms delay between responses. */
usleep_range(3000 , 4000 );
}
}
/*
* si4713_tx_tune_freq - Sets the state of the RF carrier and sets the tuning
* frequency between 76 and 108 MHz in 10 kHz units and
* steps of 50 kHz .
* @ sdev : si4713_device structure for the device we are communicating
* @ frequency : desired frequency ( 76 - 108 MHz , unit 10 KHz , step 50 kHz )
*/
static int si4713_tx_tune_freq(struct si4713_device *sdev, u16 frequency)
{
int err;
u8 val[SI4713_TXFREQ_NRESP];
/*
* . First byte = 0
* . Second byte = frequency ' s MSB
* . Third byte = frequency ' s LSB
*/
const u8 args[SI4713_TXFREQ_NARGS] = {
0 x00,
msb(frequency),
lsb(frequency),
};
err = si4713_send_command(sdev, SI4713_CMD_TX_TUNE_FREQ,
args, ARRAY_SIZE(args), val,
ARRAY_SIZE(val), DEFAULT_TIMEOUT);
if (err < 0 )
return err;
v4l2_dbg(1 , debug, &sdev->sd,
"%s: frequency=0x%02x status=0x%02x\n" , __func__,
frequency, val[0 ]);
err = si4713_wait_stc(sdev, TIMEOUT_TX_TUNE);
if (err < 0 )
return err;
return compose_u16(args[1 ], args[2 ]);
}
/*
* si4713_tx_tune_power - Sets the RF voltage level between 88 and 120 dBuV in
* 1 dB units . A value of 0 x00 indicates off . The command
* also sets the antenna tuning capacitance . A value of 0
* indicates autotuning , and a value of 1 - 191 indicates
* a manual override , which results in a tuning
* capacitance of 0 . 25 pF x @ antcap .
* @ sdev : si4713_device structure for the device we are communicating
* @ power : tuning power ( 88 - 120 dBuV , unit / step 1 dB )
* @ antcap : value of antenna tuning capacitor ( 0 - 191 )
*/
static int si4713_tx_tune_power(struct si4713_device *sdev, u8 power,
u8 antcap)
{
int err;
u8 val[SI4713_TXPWR_NRESP];
/*
* . First byte = 0
* . Second byte = 0
* . Third byte = power
* . Fourth byte = antcap
*/
u8 args[SI4713_TXPWR_NARGS] = {
0 x00,
0 x00,
power,
antcap,
};
/* Map power values 1-87 to MIN_POWER (88) */
if (power > 0 && power < SI4713_MIN_POWER)
args[2 ] = power = SI4713_MIN_POWER;
err = si4713_send_command(sdev, SI4713_CMD_TX_TUNE_POWER,
args, ARRAY_SIZE(args), val,
ARRAY_SIZE(val), DEFAULT_TIMEOUT);
if (err < 0 )
return err;
v4l2_dbg(1 , debug, &sdev->sd,
"%s: power=0x%02x antcap=0x%02x status=0x%02x\n" ,
__func__, power, antcap, val[0 ]);
return si4713_wait_stc(sdev, TIMEOUT_TX_TUNE_POWER);
}
/*
* si4713_tx_tune_measure - Enters receive mode and measures the received noise
* level in units of dBuV on the selected frequency .
* The Frequency must be between 76 and 108 MHz in 10 kHz
* units and steps of 50 kHz . The command also sets the
* antenna tuning capacitance . A value of 0 means
* autotuning , and a value of 1 to 191 indicates manual
* override .
* @ sdev : si4713_device structure for the device we are communicating
* @ frequency : desired frequency ( 76 - 108 MHz , unit 10 KHz , step 50 kHz )
* @ antcap : value of antenna tuning capacitor ( 0 - 191 )
*/
static int si4713_tx_tune_measure(struct si4713_device *sdev, u16 frequency,
u8 antcap)
{
int err;
u8 val[SI4713_TXMEA_NRESP];
/*
* . First byte = 0
* . Second byte = frequency ' s MSB
* . Third byte = frequency ' s LSB
* . Fourth byte = antcap
*/
const u8 args[SI4713_TXMEA_NARGS] = {
0 x00,
msb(frequency),
lsb(frequency),
antcap,
};
sdev->tune_rnl = DEFAULT_TUNE_RNL;
if (antcap > SI4713_MAX_ANTCAP)
return -EDOM;
err = si4713_send_command(sdev, SI4713_CMD_TX_TUNE_MEASURE,
args, ARRAY_SIZE(args), val,
ARRAY_SIZE(val), DEFAULT_TIMEOUT);
if (err < 0 )
return err;
v4l2_dbg(1 , debug, &sdev->sd,
"%s: frequency=0x%02x antcap=0x%02x status=0x%02x\n" ,
__func__, frequency, antcap, val[0 ]);
return si4713_wait_stc(sdev, TIMEOUT_TX_TUNE);
}
/*
* si4713_tx_tune_status - Returns the status of the tx_tune_freq , tx_tune_mea or
* tx_tune_power commands . This command return the current
* frequency , output voltage in dBuV , the antenna tunning
* capacitance value and the received noise level . The
* command also clears the stcint interrupt bit when the
* first bit of its arguments is high .
* @ sdev : si4713_device structure for the device we are communicating
* @ intack : 0 x01 to clear the seek / tune complete interrupt status indicator .
* @ frequency : returned frequency
* @ power : returned power
* @ antcap : returned antenna capacitance
* @ noise : returned noise level
*/
static int si4713_tx_tune_status(struct si4713_device *sdev, u8 intack,
u16 *frequency, u8 *power,
u8 *antcap, u8 *noise)
{
int err;
u8 val[SI4713_TXSTATUS_NRESP];
/*
* . First byte = intack bit
*/
const u8 args[SI4713_TXSTATUS_NARGS] = {
intack & SI4713_INTACK_MASK,
};
err = si4713_send_command(sdev, SI4713_CMD_TX_TUNE_STATUS,
args, ARRAY_SIZE(args), val,
ARRAY_SIZE(val), DEFAULT_TIMEOUT);
if (!err) {
v4l2_dbg(1 , debug, &sdev->sd,
"%s: status=0x%02x\n" , __func__, val[0 ]);
*frequency = compose_u16(val[2 ], val[3 ]);
sdev->frequency = *frequency;
*power = val[5 ];
*antcap = val[6 ];
*noise = val[7 ];
v4l2_dbg(1 , debug, &sdev->sd,
"%s: response: %d x 10 kHz (power %d, antcap %d, rnl %d)\n" ,
__func__, *frequency, *power, *antcap, *noise);
}
return err;
}
/*
* si4713_tx_rds_buff - Loads the RDS group buffer FIFO or circular buffer .
* @ sdev : si4713_device structure for the device we are communicating
* @ mode : the buffer operation mode .
* @ rdsb : RDS Block B
* @ rdsc : RDS Block C
* @ rdsd : RDS Block D
* @ cbleft : returns the number of available circular buffer blocks minus the
* number of used circular buffer blocks .
*/
static int si4713_tx_rds_buff(struct si4713_device *sdev, u8 mode, u16 rdsb,
u16 rdsc, u16 rdsd, s8 *cbleft)
{
int err;
u8 val[SI4713_RDSBUFF_NRESP];
const u8 args[SI4713_RDSBUFF_NARGS] = {
mode & SI4713_RDSBUFF_MODE_MASK,
msb(rdsb),
lsb(rdsb),
msb(rdsc),
lsb(rdsc),
msb(rdsd),
lsb(rdsd),
};
err = si4713_send_command(sdev, SI4713_CMD_TX_RDS_BUFF,
args, ARRAY_SIZE(args), val,
ARRAY_SIZE(val), DEFAULT_TIMEOUT);
if (!err) {
v4l2_dbg(1 , debug, &sdev->sd,
"%s: status=0x%02x\n" , __func__, val[0 ]);
*cbleft = (s8)val[2 ] - val[3 ];
v4l2_dbg(1 , debug, &sdev->sd,
"%s: response: interrupts 0x%02x cb avail: %d cb used %d fifo avail %d fifo used %d\n" ,
__func__, val[1 ], val[2 ], val[3 ], val[4 ], val[5 ]);
}
return err;
}
/*
* si4713_tx_rds_ps - Loads the program service buffer .
* @ sdev : si4713_device structure for the device we are communicating
* @ psid : program service id to be loaded .
* @ pschar : assumed 4 size char array to be loaded into the program service
*/
static int si4713_tx_rds_ps(struct si4713_device *sdev, u8 psid,
unsigned char *pschar)
{
int err;
u8 val[SI4713_RDSPS_NRESP];
const u8 args[SI4713_RDSPS_NARGS] = {
psid & SI4713_RDSPS_PSID_MASK,
pschar[0 ],
pschar[1 ],
pschar[2 ],
pschar[3 ],
};
err = si4713_send_command(sdev, SI4713_CMD_TX_RDS_PS,
args, ARRAY_SIZE(args), val,
ARRAY_SIZE(val), DEFAULT_TIMEOUT);
if (err < 0 )
return err;
v4l2_dbg(1 , debug, &sdev->sd, "%s: status=0x%02x\n" , __func__, val[0 ]);
return err;
}
static int si4713_set_power_state(struct si4713_device *sdev, u8 value)
{
if (value)
return si4713_powerup(sdev);
return si4713_powerdown(sdev);
}
static int si4713_set_mute(struct si4713_device *sdev, u16 mute)
{
int rval = 0 ;
mute = set_mute(mute);
if (sdev->power_state)
rval = si4713_write_property(sdev,
SI4713_TX_LINE_INPUT_MUTE, mute);
return rval;
}
static int si4713_set_rds_ps_name(struct si4713_device *sdev, char *ps_name)
{
int rval = 0 , i;
u8 len = 0 ;
/* We want to clear the whole thing */
if (!strlen(ps_name))
memset(ps_name, 0 , MAX_RDS_PS_NAME + 1 );
if (sdev->power_state) {
/* Write the new ps name and clear the padding */
for (i = 0 ; i < MAX_RDS_PS_NAME; i += (RDS_BLOCK / 2 )) {
rval = si4713_tx_rds_ps(sdev, (i / (RDS_BLOCK / 2 )),
ps_name + i);
if (rval < 0 )
return rval;
}
/* Setup the size to be sent */
if (strlen(ps_name))
len = strlen(ps_name) - 1 ;
else
len = 1 ;
rval = si4713_write_property(sdev,
SI4713_TX_RDS_PS_MESSAGE_COUNT,
rds_ps_nblocks(len));
if (rval < 0 )
return rval;
rval = si4713_write_property(sdev,
SI4713_TX_RDS_PS_REPEAT_COUNT,
DEFAULT_RDS_PS_REPEAT_COUNT * 2 );
if (rval < 0 )
return rval;
}
return rval;
}
static int si4713_set_rds_radio_text(struct si4713_device *sdev, const char *rt)
{
static const char cr[RDS_RADIOTEXT_BLK_SIZE] = { RDS_CARRIAGE_RETURN, 0 };
int rval = 0 , i;
u16 t_index = 0 ;
u8 b_index = 0 , cr_inserted = 0 ;
s8 left;
if (!sdev->power_state)
return rval;
rval = si4713_tx_rds_buff(sdev, RDS_BLOCK_CLEAR, 0 , 0 , 0 , &left);
if (rval < 0 )
return rval;
if (!strlen(rt))
return rval;
do {
/* RDS spec says that if the last block isn't used,
* then apply a carriage return
*/
if (t_index < (RDS_RADIOTEXT_INDEX_MAX * RDS_RADIOTEXT_BLK_SIZE)) {
for (i = 0 ; i < RDS_RADIOTEXT_BLK_SIZE; i++) {
if (!rt[t_index + i] ||
rt[t_index + i] == RDS_CARRIAGE_RETURN) {
rt = cr;
cr_inserted = 1 ;
break ;
}
}
}
rval = si4713_tx_rds_buff(sdev, RDS_BLOCK_LOAD,
compose_u16(RDS_RADIOTEXT_2A, b_index++),
compose_u16(rt[t_index], rt[t_index + 1 ]),
compose_u16(rt[t_index + 2 ], rt[t_index + 3 ]),
&left);
if (rval < 0 )
return rval;
t_index += RDS_RADIOTEXT_BLK_SIZE;
if (cr_inserted)
break ;
} while (left > 0 );
return rval;
}
/*
* si4713_update_tune_status - update properties from tx_tune_status
* command . Must be called with sdev - > mutex held .
* @ sdev : si4713_device structure for the device we are communicating
*/
static int si4713_update_tune_status(struct si4713_device *sdev)
{
int rval;
u16 f = 0 ;
u8 p = 0 , a = 0 , n = 0 ;
rval = si4713_tx_tune_status(sdev, 0 x00, &f, &p, &a, &n);
if (rval < 0 )
goto exit ;
/* TODO: check that power_level and antenna_capacitor really are not
changed by the hardware . If they are , then these controls should become
volatiles .
sdev - > power_level = p ;
sdev->antenna_capacitor = a;*/
sdev->tune_rnl = n;
exit :
return rval;
}
static int si4713_choose_econtrol_action(struct si4713_device *sdev, u32 id,
s32 *bit, s32 *mask, u16 *property, int *mul,
unsigned long **table, int *size)
{
s32 rval = 0 ;
switch (id) {
/* FM_TX class controls */
case V4L2_CID_RDS_TX_PI:
*property = SI4713_TX_RDS_PI;
*mul = 1 ;
break ;
case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD:
*property = SI4713_TX_ACOMP_THRESHOLD;
*mul = 1 ;
break ;
case V4L2_CID_AUDIO_COMPRESSION_GAIN:
*property = SI4713_TX_ACOMP_GAIN;
*mul = 1 ;
break ;
case V4L2_CID_PILOT_TONE_FREQUENCY:
*property = SI4713_TX_PILOT_FREQUENCY;
*mul = 1 ;
break ;
case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME:
*property = SI4713_TX_ACOMP_ATTACK_TIME;
*mul = ATTACK_TIME_UNIT;
break ;
case V4L2_CID_PILOT_TONE_DEVIATION:
*property = SI4713_TX_PILOT_DEVIATION;
*mul = 10 ;
break ;
case V4L2_CID_AUDIO_LIMITER_DEVIATION:
*property = SI4713_TX_AUDIO_DEVIATION;
*mul = 10 ;
break ;
case V4L2_CID_RDS_TX_DEVIATION:
*property = SI4713_TX_RDS_DEVIATION;
*mul = 1 ;
break ;
case V4L2_CID_RDS_TX_PTY:
*property = SI4713_TX_RDS_PS_MISC;
*bit = 5 ;
*mask = 0 x1F << 5 ;
break ;
case V4L2_CID_RDS_TX_DYNAMIC_PTY:
*property = SI4713_TX_RDS_PS_MISC;
*bit = 15 ;
*mask = 1 << 15 ;
break ;
case V4L2_CID_RDS_TX_COMPRESSED:
*property = SI4713_TX_RDS_PS_MISC;
*bit = 14 ;
*mask = 1 << 14 ;
break ;
case V4L2_CID_RDS_TX_ARTIFICIAL_HEAD:
*property = SI4713_TX_RDS_PS_MISC;
*bit = 13 ;
*mask = 1 << 13 ;
break ;
case V4L2_CID_RDS_TX_MONO_STEREO:
*property = SI4713_TX_RDS_PS_MISC;
*bit = 12 ;
*mask = 1 << 12 ;
break ;
case V4L2_CID_RDS_TX_TRAFFIC_PROGRAM:
*property = SI4713_TX_RDS_PS_MISC;
*bit = 10 ;
*mask = 1 << 10 ;
break ;
case V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT:
*property = SI4713_TX_RDS_PS_MISC;
*bit = 4 ;
*mask = 1 << 4 ;
break ;
case V4L2_CID_RDS_TX_MUSIC_SPEECH:
*property = SI4713_TX_RDS_PS_MISC;
*bit = 3 ;
*mask = 1 << 3 ;
break ;
case V4L2_CID_AUDIO_LIMITER_ENABLED:
*property = SI4713_TX_ACOMP_ENABLE;
*bit = 1 ;
*mask = 1 << 1 ;
break ;
case V4L2_CID_AUDIO_COMPRESSION_ENABLED:
*property = SI4713_TX_ACOMP_ENABLE;
*bit = 0 ;
*mask = 1 << 0 ;
break ;
case V4L2_CID_PILOT_TONE_ENABLED:
*property = SI4713_TX_COMPONENT_ENABLE;
*bit = 0 ;
*mask = 1 << 0 ;
break ;
case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME:
*property = SI4713_TX_LIMITER_RELEASE_TIME;
*table = limiter_times;
*size = ARRAY_SIZE(limiter_times);
break ;
case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME:
*property = SI4713_TX_ACOMP_RELEASE_TIME;
*table = acomp_rtimes;
*size = ARRAY_SIZE(acomp_rtimes);
break ;
case V4L2_CID_TUNE_PREEMPHASIS:
*property = SI4713_TX_PREEMPHASIS;
*table = preemphasis_values;
*size = ARRAY_SIZE(preemphasis_values);
break ;
default :
rval = -EINVAL;
break ;
}
return rval;
}
static int si4713_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequency *f);
static int si4713_s_modulator(struct v4l2_subdev *sd, const struct v4l2_modulator *);
/*
* si4713_setup - Sets the device up with current configuration .
* @ sdev : si4713_device structure for the device we are communicating
*/
static int si4713_setup(struct si4713_device *sdev)
{
struct v4l2_frequency f;
struct v4l2_modulator vm;
int rval;
/* Device procedure needs to set frequency first */
f.tuner = 0 ;
f.frequency = sdev->frequency ? sdev->frequency : DEFAULT_FREQUENCY;
f.frequency = si4713_to_v4l2(f.frequency);
rval = si4713_s_frequency(&sdev->sd, &f);
vm.index = 0 ;
if (sdev->stereo)
vm.txsubchans = V4L2_TUNER_SUB_STEREO;
else
vm.txsubchans = V4L2_TUNER_SUB_MONO;
if (sdev->rds_enabled)
vm.txsubchans |= V4L2_TUNER_SUB_RDS;
si4713_s_modulator(&sdev->sd, &vm);
return rval;
}
/*
* si4713_initialize - Sets the device up with default configuration .
* @ sdev : si4713_device structure for the device we are communicating
*/
static int si4713_initialize(struct si4713_device *sdev)
{
int rval;
rval = si4713_set_power_state(sdev, POWER_ON);
if (rval < 0 )
return rval;
rval = si4713_checkrev(sdev);
if (rval < 0 )
return rval;
rval = si4713_set_power_state(sdev, POWER_OFF);
if (rval < 0 )
return rval;
sdev->frequency = DEFAULT_FREQUENCY;
sdev->stereo = 1 ;
sdev->tune_rnl = DEFAULT_TUNE_RNL;
return 0 ;
}
/* si4713_s_ctrl - set the value of a control */
static int si4713_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct si4713_device *sdev =
container_of(ctrl->handler, struct si4713_device, ctrl_handler);
u32 val = 0 ;
s32 bit = 0 , mask = 0 ;
u16 property = 0 ;
int mul = 0 ;
unsigned long *table = NULL;
int size = 0 ;
bool force = false ;
int c;
int ret = 0 ;
if (ctrl->id != V4L2_CID_AUDIO_MUTE)
return -EINVAL;
if (ctrl->is_new) {
if (ctrl->val) {
ret = si4713_set_mute(sdev, ctrl->val);
if (!ret)
ret = si4713_set_power_state(sdev, POWER_DOWN);
return ret;
}
ret = si4713_set_power_state(sdev, POWER_UP);
if (!ret)
ret = si4713_set_mute(sdev, ctrl->val);
if (!ret)
ret = si4713_setup(sdev);
if (ret)
return ret;
force = true ;
}
if (!sdev->power_state)
return 0 ;
for (c = 1 ; !ret && c < ctrl->ncontrols; c++) {
ctrl = ctrl->cluster[c];
if (!force && !ctrl->is_new)
continue ;
switch (ctrl->id) {
case V4L2_CID_RDS_TX_PS_NAME:
ret = si4713_set_rds_ps_name(sdev, ctrl->p_new.p_char);
break ;
case V4L2_CID_RDS_TX_RADIO_TEXT:
ret = si4713_set_rds_radio_text(sdev, ctrl->p_new.p_char);
break ;
case V4L2_CID_TUNE_ANTENNA_CAPACITOR:
/* don't handle this control if we force setting all
* controls since in that case it will be handled by
* V4L2_CID_TUNE_POWER_LEVEL. */
if (force)
break ;
fallthrough;
case V4L2_CID_TUNE_POWER_LEVEL:
ret = si4713_tx_tune_power(sdev,
sdev->tune_pwr_level->val, sdev->tune_ant_cap->val);
if (!ret) {
/* Make sure we don't set this twice */
sdev->tune_ant_cap->is_new = false ;
sdev->tune_pwr_level->is_new = false ;
}
break ;
case V4L2_CID_RDS_TX_ALT_FREQS_ENABLE:
case V4L2_CID_RDS_TX_ALT_FREQS:
if (sdev->rds_alt_freqs_enable->val) {
val = sdev->rds_alt_freqs->p_new.p_u32[0 ];
val = val / 100 - 876 + 0 xe101;
} else {
val = 0 xe0e0;
}
ret = si4713_write_property(sdev, SI4713_TX_RDS_PS_AF, val);
break ;
default :
ret = si4713_choose_econtrol_action(sdev, ctrl->id, &bit,
&mask, &property, &mul, &table, &size);
if (ret < 0 )
break ;
val = ctrl->val;
if (mul) {
val = val / mul;
} else if (table) {
ret = usecs_to_dev(val, table, size);
if (ret < 0 )
break ;
val = ret;
ret = 0 ;
}
if (mask) {
ret = si4713_read_property(sdev, property, &val);
if (ret < 0 )
break ;
val = set_bits(val, ctrl->val, bit, mask);
}
ret = si4713_write_property(sdev, property, val);
if (ret < 0 )
break ;
if (mask)
val = ctrl->val;
break ;
}
}
return ret;
}
/* si4713_ioctl - deal with private ioctls (only rnl for now) */
static long si4713_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
{
struct si4713_device *sdev = to_si4713_device(sd);
struct si4713_rnl *rnl = arg;
u16 frequency;
int rval = 0 ;
if (!arg)
return -EINVAL;
switch (cmd) {
case SI4713_IOC_MEASURE_RNL:
frequency = v4l2_to_si4713(rnl->frequency);
if (sdev->power_state) {
/* Set desired measurement frequency */
rval = si4713_tx_tune_measure(sdev, frequency, 0 );
if (rval < 0 )
return rval;
/* get results from tune status */
rval = si4713_update_tune_status(sdev);
if (rval < 0 )
return rval;
}
rnl->rnl = sdev->tune_rnl;
break ;
default :
/* nothing */
rval = -ENOIOCTLCMD;
}
return rval;
}
/* si4713_g_modulator - get modulator attributes */
static int si4713_g_modulator(struct v4l2_subdev *sd, struct v4l2_modulator *vm)
{
struct si4713_device *sdev = to_si4713_device(sd);
int rval = 0 ;
if (!sdev)
return -ENODEV;
if (vm->index > 0 )
return -EINVAL;
strscpy(vm->name, "FM Modulator" , sizeof (vm->name));
vm->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LOW |
V4L2_TUNER_CAP_RDS | V4L2_TUNER_CAP_RDS_CONTROLS;
/* Report current frequency range limits */
vm->rangelow = si4713_to_v4l2(FREQ_RANGE_LOW);
vm->rangehigh = si4713_to_v4l2(FREQ_RANGE_HIGH);
if (sdev->power_state) {
u32 comp_en = 0 ;
rval = si4713_read_property(sdev, SI4713_TX_COMPONENT_ENABLE,
&comp_en);
if (rval < 0 )
return rval;
sdev->stereo = get_status_bit(comp_en, 1 , 1 << 1 );
}
/* Report current audio mode: mono or stereo */
if (sdev->stereo)
vm->txsubchans = V4L2_TUNER_SUB_STEREO;
else
vm->txsubchans = V4L2_TUNER_SUB_MONO;
/* Report rds feature status */
if (sdev->rds_enabled)
vm->txsubchans |= V4L2_TUNER_SUB_RDS;
else
vm->txsubchans &= ~V4L2_TUNER_SUB_RDS;
return rval;
}
/* si4713_s_modulator - set modulator attributes */
static int si4713_s_modulator(struct v4l2_subdev *sd, const struct v4l2_modulator *vm)
{
struct si4713_device *sdev = to_si4713_device(sd);
int rval = 0 ;
u16 stereo, rds;
u32 p;
if (!sdev)
return -ENODEV;
if (vm->index > 0 )
return -EINVAL;
/* Set audio mode: mono or stereo */
if (vm->txsubchans & V4L2_TUNER_SUB_STEREO)
stereo = 1 ;
else if (vm->txsubchans & V4L2_TUNER_SUB_MONO)
stereo = 0 ;
else
return -EINVAL;
rds = !!(vm->txsubchans & V4L2_TUNER_SUB_RDS);
if (sdev->power_state) {
rval = si4713_read_property(sdev,
SI4713_TX_COMPONENT_ENABLE, &p);
if (rval < 0 )
return rval;
p = set_bits(p, stereo, 1 , 1 << 1 );
p = set_bits(p, rds, 2 , 1 << 2 );
rval = si4713_write_property(sdev,
SI4713_TX_COMPONENT_ENABLE, p);
if (rval < 0 )
return rval;
}
sdev->stereo = stereo;
sdev->rds_enabled = rds;
return rval;
}
/* si4713_g_frequency - get tuner or modulator radio frequency */
static int si4713_g_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f)
{
struct si4713_device *sdev = to_si4713_device(sd);
int rval = 0 ;
if (f->tuner)
return -EINVAL;
if (sdev->power_state) {
u16 freq;
u8 p, a, n;
rval = si4713_tx_tune_status(sdev, 0 x00, &freq, &p, &a, &n);
if (rval < 0 )
return rval;
sdev->frequency = freq;
}
f->frequency = si4713_to_v4l2(sdev->frequency);
return rval;
}
/* si4713_s_frequency - set tuner or modulator radio frequency */
static int si4713_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequency *f)
{
struct si4713_device *sdev = to_si4713_device(sd);
int rval = 0 ;
u16 frequency = v4l2_to_si4713(f->frequency);
if (f->tuner)
return -EINVAL;
/* Check frequency range */
frequency = clamp_t(u16, frequency, FREQ_RANGE_LOW, FREQ_RANGE_HIGH);
if (sdev->power_state) {
rval = si4713_tx_tune_freq(sdev, frequency);
if (rval < 0 )
return rval;
frequency = rval;
rval = 0 ;
}
sdev->frequency = frequency;
return rval;
}
static const struct v4l2_ctrl_ops si4713_ctrl_ops = {
.s_ctrl = si4713_s_ctrl,
};
static const struct v4l2_subdev_core_ops si4713_subdev_core_ops = {
.ioctl = si4713_ioctl,
};
static const struct v4l2_subdev_tuner_ops si4713_subdev_tuner_ops = {
.g_frequency = si4713_g_frequency,
.s_frequency = si4713_s_frequency,
.g_modulator = si4713_g_modulator,
.s_modulator = si4713_s_modulator,
};
static const struct v4l2_subdev_ops si4713_subdev_ops = {
.core = &si4713_subdev_core_ops,
.tuner = &si4713_subdev_tuner_ops,
};
static const struct v4l2_ctrl_config si4713_alt_freqs_ctrl = {
.id = V4L2_CID_RDS_TX_ALT_FREQS,
.type = V4L2_CTRL_TYPE_U32,
.min = 87600 ,
.max = 107900 ,
.step = 100 ,
.def = 87600 ,
.dims = { 1 },
.elem_size = sizeof (u32),
};
/*
* I2C driver interface
*/
/* si4713_probe - probe for the device */
static int si4713_probe(struct i2c_client *client)
{
struct si4713_device *sdev;
struct v4l2_ctrl_handler *hdl;
struct si4713_platform_data *pdata = client->dev.platform_data;
struct device_node *np = client->dev.of_node;
struct radio_si4713_platform_data si4713_pdev_pdata;
struct platform_device *si4713_pdev;
int rval;
sdev = devm_kzalloc(&client->dev, sizeof (*sdev), GFP_KERNEL);
if (!sdev) {
dev_err(&client->dev, "Failed to alloc video device.\n" );
rval = -ENOMEM;
goto exit ;
}
sdev->gpio_reset = devm_gpiod_get_optional(&client->dev, "reset" ,
GPIOD_OUT_LOW);
if (IS_ERR(sdev->gpio_reset)) {
rval = PTR_ERR(sdev->gpio_reset);
dev_err(&client->dev, "Failed to request gpio: %d\n" , rval);
goto exit ;
}
sdev->vdd = devm_regulator_get_optional(&client->dev, "vdd" );
if (IS_ERR(sdev->vdd)) {
rval = PTR_ERR(sdev->vdd);
if (rval == -EPROBE_DEFER)
goto exit ;
dev_dbg(&client->dev, "no vdd regulator found: %d\n" , rval);
sdev->vdd = NULL;
}
sdev->vio = devm_regulator_get_optional(&client->dev, "vio" );
if (IS_ERR(sdev->vio)) {
rval = PTR_ERR(sdev->vio);
if (rval == -EPROBE_DEFER)
goto exit ;
dev_dbg(&client->dev, "no vio regulator found: %d\n" , rval);
sdev->vio = NULL;
}
v4l2_i2c_subdev_init(&sdev->sd, client, &si4713_subdev_ops);
init_completion(&sdev->work);
hdl = &sdev->ctrl_handler;
v4l2_ctrl_handler_init(hdl, 20 );
sdev->mute = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_AUDIO_MUTE, 0 , 1 , 1 , DEFAULT_MUTE);
sdev->rds_pi = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_RDS_TX_PI, 0 , 0 xffff, 1 , DEFAULT_RDS_PI);
sdev->rds_pty = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_RDS_TX_PTY, 0 , 31 , 1 , DEFAULT_RDS_PTY);
sdev->rds_compressed = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_RDS_TX_COMPRESSED, 0 , 1 , 1 , 0 );
sdev->rds_art_head = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_RDS_TX_ARTIFICIAL_HEAD, 0 , 1 , 1 , 0 );
sdev->rds_stereo = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_RDS_TX_MONO_STEREO, 0 , 1 , 1 , 1 );
sdev->rds_tp = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_RDS_TX_TRAFFIC_PROGRAM, 0 , 1 , 1 , 0 );
sdev->rds_ta = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT, 0 , 1 , 1 , 0 );
sdev->rds_ms = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_RDS_TX_MUSIC_SPEECH, 0 , 1 , 1 , 1 );
sdev->rds_dyn_pty = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_RDS_TX_DYNAMIC_PTY, 0 , 1 , 1 , 0 );
sdev->rds_alt_freqs_enable = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_RDS_TX_ALT_FREQS_ENABLE, 0 , 1 , 1 , 0 );
sdev->rds_alt_freqs = v4l2_ctrl_new_custom(hdl, &si4713_alt_freqs_ctrl, NULL);
sdev->rds_deviation = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_RDS_TX_DEVIATION, 0 , MAX_RDS_DEVIATION,
10 , DEFAULT_RDS_DEVIATION);
/*
* Report step as 8 . From RDS spec , psname
* should be 8 . But there are receivers which scroll strings
* sized as 8 xN .
*/
sdev->rds_ps_name = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_RDS_TX_PS_NAME, 0 , MAX_RDS_PS_NAME, 8 , 0 );
/*
* Report step as 32 ( 2 A block ) . From RDS spec ,
* radio text should be 32 for 2 A block . But there are receivers
* which scroll strings sized as 32 xN . Setting default to 32 .
*/
sdev->rds_radio_text = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_RDS_TX_RADIO_TEXT, 0 , MAX_RDS_RADIO_TEXT, 32 , 0 );
sdev->limiter_enabled = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_AUDIO_LIMITER_ENABLED, 0 , 1 , 1 , 1 );
sdev->limiter_release_time = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_AUDIO_LIMITER_RELEASE_TIME, 250 ,
MAX_LIMITER_RELEASE_TIME, 10 , DEFAULT_LIMITER_RTIME);
sdev->limiter_deviation = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_AUDIO_LIMITER_DEVIATION, 0 ,
MAX_LIMITER_DEVIATION, 10 , DEFAULT_LIMITER_DEV);
sdev->compression_enabled = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_AUDIO_COMPRESSION_ENABLED, 0 , 1 , 1 , 1 );
sdev->compression_gain = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_AUDIO_COMPRESSION_GAIN, 0 , MAX_ACOMP_GAIN, 1 ,
DEFAULT_ACOMP_GAIN);
sdev->compression_threshold = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_AUDIO_COMPRESSION_THRESHOLD,
MIN_ACOMP_THRESHOLD, MAX_ACOMP_THRESHOLD, 1 ,
DEFAULT_ACOMP_THRESHOLD);
sdev->compression_attack_time = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME, 0 ,
MAX_ACOMP_ATTACK_TIME, 500 , DEFAULT_ACOMP_ATIME);
sdev->compression_release_time = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME, 100000 ,
MAX_ACOMP_RELEASE_TIME, 100000 , DEFAULT_ACOMP_RTIME);
sdev->pilot_tone_enabled = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_PILOT_TONE_ENABLED, 0 , 1 , 1 , 1 );
sdev->pilot_tone_deviation = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_PILOT_TONE_DEVIATION, 0 , MAX_PILOT_DEVIATION,
10 , DEFAULT_PILOT_DEVIATION);
sdev->pilot_tone_freq = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_PILOT_TONE_FREQUENCY, 0 , MAX_PILOT_FREQUENCY,
1 , DEFAULT_PILOT_FREQUENCY);
sdev->tune_preemphasis = v4l2_ctrl_new_std_menu(hdl, &si4713_ctrl_ops,
V4L2_CID_TUNE_PREEMPHASIS,
V4L2_PREEMPHASIS_75_uS, 0 , V4L2_PREEMPHASIS_50_uS);
sdev->tune_pwr_level = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_TUNE_POWER_LEVEL, 0 , SI4713_MAX_POWER,
1 , DEFAULT_POWER_LEVEL);
sdev->tune_ant_cap = v4l2_ctrl_new_std(hdl, &si4713_ctrl_ops,
V4L2_CID_TUNE_ANTENNA_CAPACITOR, 0 , SI4713_MAX_ANTCAP,
1 , 0 );
if (hdl->error) {
rval = hdl->error;
goto free_ctrls;
}
v4l2_ctrl_cluster(29 , &sdev->mute);
sdev->sd.ctrl_handler = hdl;
if (client->irq) {
rval = devm_request_irq(&client->dev, client->irq,
si4713_handler, IRQF_TRIGGER_FALLING,
client->name, sdev);
if (rval < 0 ) {
v4l2_err(&sdev->sd, "Could not request IRQ\n" );
goto free_ctrls;
}
v4l2_dbg(1 , debug, &sdev->sd, "IRQ requested.\n" );
} else {
v4l2_warn(&sdev->sd, "IRQ not configured. Using timeouts.\n" );
}
rval = si4713_initialize(sdev);
if (rval < 0 ) {
v4l2_err(&sdev->sd, "Failed to probe device information.\n" );
goto free_ctrls;
}
if (!np && (!pdata || !pdata->is_platform_device))
return 0 ;
si4713_pdev = platform_device_alloc("radio-si4713" , -1 );
if (!si4713_pdev) {
rval = -ENOMEM;
goto put_main_pdev;
}
si4713_pdev_pdata.subdev = client;
rval = platform_device_add_data(si4713_pdev, &si4713_pdev_pdata,
sizeof (si4713_pdev_pdata));
if (rval)
goto put_main_pdev;
rval = platform_device_add(si4713_pdev);
if (rval)
goto put_main_pdev;
sdev->pd = si4713_pdev;
return 0 ;
put_main_pdev:
platform_device_put(si4713_pdev);
v4l2_device_unregister_subdev(&sdev->sd);
free_ctrls:
v4l2_ctrl_handler_free(hdl);
exit :
return rval;
}
/* si4713_remove - remove the device */
static void si4713_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct si4713_device *sdev = to_si4713_device(sd);
platform_device_unregister(sdev->pd);
if (sdev->power_state)
si4713_set_power_state(sdev, POWER_DOWN);
v4l2_device_unregister_subdev(sd);
v4l2_ctrl_handler_free(sd->ctrl_handler);
}
/* si4713_i2c_driver - i2c driver interface */
static const struct i2c_device_id si4713_id[] = {
{ "si4713" },
{ }
};
MODULE_DEVICE_TABLE(i2c, si4713_id);
#if IS_ENABLED(CONFIG_OF)
static const struct of_device_id si4713_of_match[] = {
{ .compatible = "silabs,si4713" },
{ },
};
MODULE_DEVICE_TABLE(of, si4713_of_match);
#endif
static struct i2c_driver si4713_i2c_driver = {
.driver = {
.name = "si4713" ,
.of_match_table = of_match_ptr(si4713_of_match),
},
.probe = si4713_probe,
.remove = si4713_remove,
.id_table = si4713_id,
};
module_i2c_driver(si4713_i2c_driver);
Messung V0.5 in Prozent C=97 H=88 G=92
¤ Dauer der Verarbeitung: 0.24 Sekunden
(vorverarbeitet am 2026-10-11)
¤
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