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SI4713.c
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SI4713.c
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//////////////////////////////////////////////
// Driver for the SI4713 device over //
// I2C and I2S connections. //
// //
// Author: David Kroell //
// Version: 0.0.1 //
//////////////////////////////////////////////
#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.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 <[email protected]>");
MODULE_DESCRIPTION("I2C driver for Si4713 FM Radio Transmitter");
MODULE_VERSION("0.0.1");
#define DEFAULT_RDS_PI 0x00
#define DEFAULT_RDS_PTY 0x00
#define DEFAULT_RDS_DEVIATION 0x00C8
#define DEFAULT_RDS_PS_REPEAT_COUNT 0x0003
#define DEFAULT_LIMITER_RTIME 0x1392
#define DEFAULT_LIMITER_DEV 0x102CA
#define DEFAULT_PILOT_FREQUENCY 0x4A38
#define DEFAULT_PILOT_DEVIATION 0x1A5E
#define DEFAULT_ACOMP_ATIME 0x0000
#define DEFAULT_ACOMP_RTIME 0xF4240L
#define DEFAULT_ACOMP_GAIN 0x0F
#define DEFAULT_ACOMP_THRESHOLD (-0x28)
#define DEFAULT_MUTE 0x01
#define DEFAULT_POWER_LEVEL 88
#define DEFAULT_FREQUENCY 8800
#define DEFAULT_PREEMPHASIS FMPE_EU
#define DEFAULT_TUNE_RNL 0xFF
#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 0x03
#define RDS_BLOCK_LOAD 0x04
#define RDS_RADIOTEXT_2A 0x20
#define RDS_RADIOTEXT_BLK_SIZE 4
#define RDS_RADIOTEXT_INDEX_MAX 0x0F
#define RDS_CARRIAGE_RETURN 0x0D
#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 0x00
#define POWER_ON 0x01
#define msb(x) ((u8)((u16) x >> 8))
#define lsb(x) ((u8)((u16) x & 0x00FF))
#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] = {
0x00,
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] = {
0x00,
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] = {
0x00,
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 0x00 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] = {
0x00,
0x00,
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] = {
0x00,
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: 0x01 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, 0x00, &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 = 0x1F << 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;