/*
* si470x_vidioc_s_ctrl - set the value of a control
*/
static int si470x_vidioc_s_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct si470x_device *radio = video_drvdata(file);
int retval = 0;
/* safety checks */
if (radio->disconnected) {
retval = -EIO;
goto done;
}
switch (ctrl->id) {
case V4L2_CID_AUDIO_VOLUME:
radio->registers[SYSCONFIG2] &= ~SYSCONFIG2_VOLUME;
radio->registers[SYSCONFIG2] |= ctrl->value;
retval = si470x_set_register(radio, SYSCONFIG2);
break;
case V4L2_CID_AUDIO_MUTE:
if (ctrl->value == 1)
radio->registers[POWERCFG] &= ~POWERCFG_DMUTE;
else
radio->registers[POWERCFG] |= POWERCFG_DMUTE;
retval = si470x_set_register(radio, POWERCFG);
break;
default:
retval = -EINVAL;
}
done:
if (retval < 0)
printk(KERN_WARNING DRIVER_NAME
": set control failed with %d\n", retval);
return retval;
}
/*
* si470x_start - switch on radio
*/
static int si470x_start(struct si470x_device *radio)
{
int retval;
/* powercfg */
radio->registers[POWERCFG] =
POWERCFG_DMUTE | POWERCFG_ENABLE | POWERCFG_RDSM;
retval = si470x_set_register(radio, POWERCFG);
if (retval < 0)
goto done;
/* sysconfig 1 */
radio->registers[SYSCONFIG1] = SYSCONFIG1_DE;
retval = si470x_set_register(radio, SYSCONFIG1);
if (retval < 0)
goto done;
/* sysconfig 2 */
radio->registers[SYSCONFIG2] =
(0x3f << 8) | /* SEEKTH */
((band << 6) & SYSCONFIG2_BAND) | /* BAND */
((space << 4) & SYSCONFIG2_SPACE) | /* SPACE */
15; /* VOLUME (max) */
retval = si470x_set_register(radio, SYSCONFIG2);
if (retval < 0)
goto done;
/* reset last channel */
retval = si470x_set_chan(radio,
radio->registers[CHANNEL] & CHANNEL_CHAN);
done:
return retval;
}
/*
* si470x_set_chan - set the channel
*/
static int si470x_set_chan(struct si470x_device *radio, unsigned short chan)
{
int retval;
unsigned long timeout;
bool timed_out = 0;
/* start tuning */
radio->registers[CHANNEL] &= ~CHANNEL_CHAN;
radio->registers[CHANNEL] |= CHANNEL_TUNE | chan;
retval = si470x_set_register(radio, CHANNEL);
if (retval < 0)
return retval;
/* wait till seek operation has completed */
timeout = jiffies + msecs_to_jiffies(tune_timeout);
do {
retval = si470x_get_register(radio, STATUSRSSI);
if (retval < 0)
return retval;
timed_out = time_after(jiffies, timeout);
} while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) &&
(!timed_out));
if (timed_out)
printk(KERN_WARNING DRIVER_NAME
": seek does not finish after %u ms\n", tune_timeout);
/* stop tuning */
radio->registers[CHANNEL] &= ~CHANNEL_TUNE;
return si470x_set_register(radio, CHANNEL);
}
/*
* si470x_set_chan - set the channel
*/
static int si470x_set_chan(struct si470x_device *radio, unsigned short chan)
{
int retval;
bool timed_out = 0;
/* start tuning */
radio->registers[CHANNEL] &= ~CHANNEL_CHAN;
radio->registers[CHANNEL] |= CHANNEL_TUNE | chan;
retval = si470x_set_register(radio, CHANNEL);
if (retval < 0)
goto done;
/* wait till tune operation has completed */
INIT_COMPLETION(radio->completion);
retval = wait_for_completion_timeout(&radio->completion,
msecs_to_jiffies(tune_timeout));
if (!retval)
timed_out = true;
if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
dev_warn(&radio->videodev.dev, "tune does not complete\n");
if (timed_out)
dev_warn(&radio->videodev.dev,
"tune timed out after %u ms\n", tune_timeout);
/* stop tuning */
radio->registers[CHANNEL] &= ~CHANNEL_TUNE;
retval = si470x_set_register(radio, CHANNEL);
done:
return retval;
}
/*
* si470x_set_seek - set seek
*/
static int si470x_set_seek(struct si470x_device *radio,
unsigned int wrap_around, unsigned int seek_upward)
{
int retval = 0;
unsigned long timeout;
bool timed_out = 0;
/* start seeking */
radio->registers[POWERCFG] |= POWERCFG_SEEK;
if (wrap_around == 1)
radio->registers[POWERCFG] &= ~POWERCFG_SKMODE;
else
radio->registers[POWERCFG] |= POWERCFG_SKMODE;
if (seek_upward == 1)
radio->registers[POWERCFG] |= POWERCFG_SEEKUP;
else
radio->registers[POWERCFG] &= ~POWERCFG_SEEKUP;
retval = si470x_set_register(radio, POWERCFG);
if (retval < 0)
goto done;
/* wait till seek operation has completed */
timeout = jiffies + msecs_to_jiffies(seek_timeout);
do {
retval = si470x_get_register(radio, STATUSRSSI);
if (retval < 0)
goto stop;
timed_out = time_after(jiffies, timeout);
} while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) &&
(!timed_out));
if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
printk(KERN_WARNING DRIVER_NAME ": seek does not complete\n");
if (radio->registers[STATUSRSSI] & STATUSRSSI_SF)
printk(KERN_WARNING DRIVER_NAME
": seek failed / band limit reached\n");
if (timed_out)
printk(KERN_WARNING DRIVER_NAME
": seek timed out after %u ms\n", seek_timeout);
stop:
/* stop seeking */
radio->registers[POWERCFG] &= ~POWERCFG_SEEK;
retval = si470x_set_register(radio, POWERCFG);
done:
/* try again, if timed out */
if ((retval == 0) && timed_out)
retval = -EAGAIN;
return retval;
}
/*
* si470x_set_chan - set the channel
*/
static int si470x_set_chan(struct si470x_device *radio, unsigned short chan)
{
int retval;
unsigned long timeout;
bool timed_out = 0;
/* start tuning */
radio->registers[CHANNEL] &= ~CHANNEL_CHAN;
radio->registers[CHANNEL] |= CHANNEL_TUNE | chan;
retval = si470x_set_register(radio, CHANNEL);
if (retval < 0)
goto done;
/* currently I2C driver only uses interrupt way to tune */
if (radio->stci_enabled) {
INIT_COMPLETION(radio->completion);
/* wait till tune operation has completed */
retval = wait_for_completion_timeout(&radio->completion,
msecs_to_jiffies(tune_timeout));
if (!retval)
timed_out = true;
} else {
/* wait till tune operation has completed */
timeout = jiffies + msecs_to_jiffies(tune_timeout);
do {
retval = si470x_get_register(radio, STATUSRSSI);
if (retval < 0)
goto stop;
timed_out = time_after(jiffies, timeout);
} while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
&& (!timed_out));
}
if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
dev_warn(&radio->videodev->dev, "tune does not complete\n");
if (timed_out)
dev_warn(&radio->videodev->dev,
"tune timed out after %u ms\n", tune_timeout);
stop:
/* stop tuning */
radio->registers[CHANNEL] &= ~CHANNEL_TUNE;
retval = si470x_set_register(radio, CHANNEL);
done:
return retval;
}
/*
* si470x_vidioc_s_tuner - set tuner attributes
*/
static int si470x_vidioc_s_tuner(struct file *file, void *priv,
struct v4l2_tuner *tuner)
{
struct si470x_device *radio = video_drvdata(file);
int retval = -EINVAL;
/* safety checks */
if (radio->disconnected) {
retval = -EIO;
goto done;
}
if (tuner->index != 0)
goto done;
/* mono/stereo selector */
switch (tuner->audmode) {
case V4L2_TUNER_MODE_MONO:
radio->registers[POWERCFG] |= POWERCFG_MONO; /* force mono */
break;
case V4L2_TUNER_MODE_STEREO:
radio->registers[POWERCFG] &= ~POWERCFG_MONO; /* try stereo */
break;
default:
goto done;
}
retval = si470x_set_register(radio, POWERCFG);
done:
if (retval < 0)
printk(KERN_WARNING DRIVER_NAME
": set tuner failed with %d\n", retval);
return retval;
}
/*
* si470x_stop - switch off radio
*/
static int si470x_stop(struct si470x_device *radio)
{
int retval;
/* sysconfig 1 */
radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS;
retval = si470x_set_register(radio, SYSCONFIG1);
if (retval < 0)
return retval;
/* powercfg */
radio->registers[POWERCFG] &= ~POWERCFG_DMUTE;
/* POWERCFG_ENABLE has to automatically go low */
radio->registers[POWERCFG] |= POWERCFG_ENABLE | POWERCFG_DISABLE;
return si470x_set_register(radio, POWERCFG);
}
/*
* si470x_fops_open - file open
*/
int si470x_fops_open(struct file *file)
{
struct si470x_device *radio = video_drvdata(file);
int retval = 0;
mutex_lock(&radio->lock);
radio->users++;
if (radio->users == 1) {
/* start radio */
retval = si470x_start(radio);
if (retval < 0)
goto done;
/* enable RDS / STC interrupt */
radio->registers[SYSCONFIG1] |= SYSCONFIG1_RDSIEN;
radio->registers[SYSCONFIG1] |= SYSCONFIG1_STCIEN;
radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_GPIO2;
radio->registers[SYSCONFIG1] |= 0x1 << 2;
retval = si470x_set_register(radio, SYSCONFIG1);
}
done:
mutex_unlock(&radio->lock);
return retval;
}
/*
* si470x_set_band - set the band
*/
static int si470x_set_band(struct si470x_device *radio, int band)
{
if (radio->band == band)
return 0;
radio->band = band;
radio->registers[SYSCONFIG2] &= ~SYSCONFIG2_BAND;
radio->registers[SYSCONFIG2] |= radio->band << 6;
return si470x_set_register(radio, SYSCONFIG2);
}
/*
* si470x_i2c_suspend - suspend the device
*/
static int si470x_i2c_suspend(struct i2c_client *client, pm_message_t mesg)
{
struct si470x_device *radio = i2c_get_clientdata(client);
/* power down */
radio->registers[POWERCFG] |= POWERCFG_DISABLE;
if (si470x_set_register(radio, POWERCFG) < 0)
return -EIO;
return 0;
}
static int si470x_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct si470x_device *radio =
container_of(ctrl->handler, struct si470x_device, hdl);
switch (ctrl->id) {
case V4L2_CID_AUDIO_VOLUME:
radio->registers[SYSCONFIG2] &= ~SYSCONFIG2_VOLUME;
radio->registers[SYSCONFIG2] |= ctrl->val;
return si470x_set_register(radio, SYSCONFIG2);
case V4L2_CID_AUDIO_MUTE:
if (ctrl->val)
radio->registers[POWERCFG] &= ~POWERCFG_DMUTE;
else
radio->registers[POWERCFG] |= POWERCFG_DMUTE;
return si470x_set_register(radio, POWERCFG);
default:
return -EINVAL;
}
}
/*
* si470x_rds_on - switch on rds reception
*/
static int si470x_rds_on(struct si470x_device *radio)
{
int retval;
/* sysconfig 1 */
radio->registers[SYSCONFIG1] |= SYSCONFIG1_RDS;
retval = si470x_set_register(radio, SYSCONFIG1);
if (retval < 0)
radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS;
return retval;
}
/*
* si470x_i2c_resume - resume the device
*/
static int si470x_i2c_resume(struct i2c_client *client)
{
struct si470x_device *radio = i2c_get_clientdata(client);
/* power up : need 110ms */
radio->registers[POWERCFG] |= POWERCFG_ENABLE;
if (si470x_set_register(radio, POWERCFG) < 0)
return -EIO;
msleep(110);
return 0;
}
/*
* si470x_rds_on - switch on rds reception
*/
int si470x_rds_on(struct si470x_device *radio)
{
int retval;
/* sysconfig 1 */
mutex_lock(&radio->lock);
radio->registers[SYSCONFIG1] |= SYSCONFIG1_RDS;
retval = si470x_set_register(radio, SYSCONFIG1);
if (retval < 0)
radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS;
mutex_unlock(&radio->lock);
return retval;
}
/*
* si470x_set_chan - set the channel
*/
static int si470x_set_chan(struct si470x_device *radio, unsigned short chan)
{
int retval;
unsigned long timeout;
bool timed_out = 0;
/* start tuning */
radio->registers[CHANNEL] &= ~CHANNEL_CHAN;
radio->registers[CHANNEL] |= CHANNEL_TUNE | chan;
retval = si470x_set_register(radio, CHANNEL);
if (retval < 0)
goto done;
/* wait till tune operation has completed */
timeout = jiffies + msecs_to_jiffies(tune_timeout);
do {
retval = si470x_get_register(radio, STATUSRSSI);
if (retval < 0)
goto stop;
timed_out = time_after(jiffies, timeout);
} while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) &&
(!timed_out));
if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
dev_warn(&radio->videodev->dev, "tune does not complete\n");
if (timed_out)
dev_warn(&radio->videodev->dev,
"tune timed out after %u ms\n", tune_timeout);
stop:
/* stop tuning */
radio->registers[CHANNEL] &= ~CHANNEL_TUNE;
retval = si470x_set_register(radio, CHANNEL);
done:
return retval;
}
/*
* si470x_vidioc_s_ctrl - set the value of a control
*/
static int si470x_vidioc_s_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct si470x_device *radio = video_drvdata(file);
int retval = 0;
mutex_lock(&radio->lock);
/* safety checks */
retval = si470x_disconnect_check(radio);
if (retval)
goto done;
switch (ctrl->id) {
case V4L2_CID_AUDIO_VOLUME:
radio->registers[SYSCONFIG2] &= ~SYSCONFIG2_VOLUME;
radio->registers[SYSCONFIG2] |= ctrl->value;
retval = si470x_set_register(radio, SYSCONFIG2);
break;
case V4L2_CID_AUDIO_MUTE:
if (ctrl->value == 1)
radio->registers[POWERCFG] &= ~POWERCFG_DMUTE;
else
radio->registers[POWERCFG] |= POWERCFG_DMUTE;
retval = si470x_set_register(radio, POWERCFG);
break;
default:
retval = -EINVAL;
}
done:
if (retval < 0)
dev_warn(&radio->videodev->dev,
"set control failed with %d\n", retval);
mutex_unlock(&radio->lock);
return retval;
}
/*
* si470x_i2c_suspend - suspend the device
*/
static int si470x_i2c_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct si470x_device *radio = i2c_get_clientdata(client);
#ifndef CONFIG_VIDEO_V4L2
if (radio->pdata->enabled == false)
return 0;
#endif
/* power down */
radio->registers[POWERCFG] |= POWERCFG_DISABLE;
if (si470x_set_register(radio, POWERCFG) < 0)
return -EIO;
return 0;
}
/*
* si470x_i2c_resume - resume the device
*/
static int si470x_i2c_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct si470x_device *radio = i2c_get_clientdata(client);
#ifndef CONFIG_VIDEO_V4L2
if (radio->pdata->enabled == false)
return 0;
#endif
/* power up : need 110ms */
radio->registers[POWERCFG] |= POWERCFG_ENABLE;
if (si470x_set_register(radio, POWERCFG) < 0)
return -EIO;
msleep(110);
return 0;
}
/*
* si470x_vidioc_s_tuner - set tuner attributes
*/
static int si470x_vidioc_s_tuner(struct file *file, void *priv,
struct v4l2_tuner *tuner)
{
struct si470x_device *radio = video_get_drvdata(video_devdata(file));
int retval;
if (tuner->index > 0)
return -EINVAL;
if (tuner->audmode == V4L2_TUNER_MODE_MONO)
radio->registers[POWERCFG] |= POWERCFG_MONO; /* force mono */
else
radio->registers[POWERCFG] &= ~POWERCFG_MONO; /* try stereo */
retval = si470x_set_register(radio, POWERCFG);
if (retval < 0)
printk(KERN_WARNING DRIVER_NAME
": set tuner failed with %d\n", retval);
return retval;
}
/*
* si470x_vidioc_s_tuner - set tuner attributes
*/
static int si470x_vidioc_s_tuner(struct file *file, void *priv,
struct v4l2_tuner *tuner)
{
struct si470x_device *radio = video_drvdata(file);
if (tuner->index != 0)
return -EINVAL;
/* mono/stereo selector */
switch (tuner->audmode) {
case V4L2_TUNER_MODE_MONO:
radio->registers[POWERCFG] |= POWERCFG_MONO; /* force mono */
break;
case V4L2_TUNER_MODE_STEREO:
default:
radio->registers[POWERCFG] &= ~POWERCFG_MONO; /* try stereo */
break;
}
return si470x_set_register(radio, POWERCFG);
}
/*
* si470x_vidioc_s_tuner - set tuner attributes
*/
static int si470x_vidioc_s_tuner(struct file *file, void *priv,
struct v4l2_tuner *tuner)
{
struct si470x_device *radio = video_drvdata(file);
int retval = 0;
mutex_lock(&radio->lock);
/* safety checks */
retval = si470x_disconnect_check(radio);
if (retval)
goto done;
if (tuner->index != 0)
goto done;
/* mono/stereo selector */
switch (tuner->audmode) {
case V4L2_TUNER_MODE_MONO:
radio->registers[POWERCFG] |= POWERCFG_MONO; /* force mono */
break;
case V4L2_TUNER_MODE_STEREO:
radio->registers[POWERCFG] &= ~POWERCFG_MONO; /* try stereo */
break;
default:
goto done;
}
retval = si470x_set_register(radio, POWERCFG);
done:
if (retval < 0)
dev_warn(&radio->videodev->dev,
"set tuner failed with %d\n", retval);
mutex_unlock(&radio->lock);
return retval;
}
/*
* si470x_i2c_probe - probe for the device
*/
static int __devinit si470x_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct si470x_device *radio;
int retval = 0;
unsigned char version_warning = 0;
/* private data allocation and initialization */
radio = kzalloc(sizeof(struct si470x_device), GFP_KERNEL);
if (!radio) {
retval = -ENOMEM;
goto err_initial;
}
radio->users = 0;
radio->client = client;
mutex_init(&radio->lock);
/* video device allocation and initialization */
radio->videodev = video_device_alloc();
if (!radio->videodev) {
retval = -ENOMEM;
goto err_radio;
}
memcpy(radio->videodev, &si470x_viddev_template,
sizeof(si470x_viddev_template));
video_set_drvdata(radio->videodev, radio);
/* power up : need 110ms */
radio->registers[POWERCFG] = POWERCFG_ENABLE;
if (si470x_set_register(radio, POWERCFG) < 0) {
retval = -EIO;
goto err_video;
}
msleep(110);
/* get device and chip versions */
if (si470x_get_all_registers(radio) < 0) {
retval = -EIO;
goto err_video;
}
dev_info(&client->dev, "DeviceID=0x%4.4hx ChipID=0x%4.4hx\n",
radio->registers[DEVICEID], radio->registers[CHIPID]);
if ((radio->registers[CHIPID] & CHIPID_FIRMWARE) < RADIO_FW_VERSION) {
dev_warn(&client->dev,
"This driver is known to work with "
"firmware version %hu,\n", RADIO_FW_VERSION);
dev_warn(&client->dev,
"but the device has firmware version %hu.\n",
radio->registers[CHIPID] & CHIPID_FIRMWARE);
version_warning = 1;
}
/* give out version warning */
if (version_warning == 1) {
dev_warn(&client->dev,
"If you have some trouble using this driver,\n");
dev_warn(&client->dev,
"please report to V4L ML at "
"[email protected]\n");
}
/* set initial frequency */
si470x_set_freq(radio, 87.5 * FREQ_MUL); /* available in all regions */
/* rds buffer allocation */
radio->buf_size = rds_buf * 3;
radio->buffer = kmalloc(radio->buf_size, GFP_KERNEL);
if (!radio->buffer) {
retval = -EIO;
goto err_video;
}
/* rds buffer configuration */
radio->wr_index = 0;
radio->rd_index = 0;
init_waitqueue_head(&radio->read_queue);
/* mark Seek/Tune Complete Interrupt enabled */
radio->stci_enabled = true;
init_completion(&radio->completion);
retval = request_threaded_irq(client->irq, NULL, si470x_i2c_interrupt,
IRQF_TRIGGER_FALLING, DRIVER_NAME, radio);
if (retval) {
dev_err(&client->dev, "Failed to register interrupt\n");
goto err_rds;
}
/* register video device */
retval = video_register_device(radio->videodev, VFL_TYPE_RADIO,
radio_nr);
if (retval) {
dev_warn(&client->dev, "Could not register video device\n");
goto err_all;
}
i2c_set_clientdata(client, radio);
return 0;
err_all:
free_irq(client->irq, radio);
err_rds:
kfree(radio->buffer);
err_video:
video_device_release(radio->videodev);
err_radio:
kfree(radio);
err_initial:
return retval;
}
/*
* si470x_set_seek - set seek
*/
static int si470x_set_seek(struct si470x_device *radio,
unsigned int wrap_around, unsigned int seek_upward)
{
int retval = 0;
unsigned long timeout;
bool timed_out = 0;
/* start seeking */
radio->registers[POWERCFG] |= POWERCFG_SEEK;
if (wrap_around == 1)
radio->registers[POWERCFG] &= ~POWERCFG_SKMODE;
else
radio->registers[POWERCFG] |= POWERCFG_SKMODE;
if (seek_upward == 1)
radio->registers[POWERCFG] |= POWERCFG_SEEKUP;
else
radio->registers[POWERCFG] &= ~POWERCFG_SEEKUP;
retval = si470x_set_register(radio, POWERCFG);
if (retval < 0)
goto done;
/* currently I2C driver only uses interrupt way to seek */
if (radio->stci_enabled) {
INIT_COMPLETION(radio->completion);
/* wait till seek operation has completed */
retval = wait_for_completion_timeout(&radio->completion,
msecs_to_jiffies(seek_timeout));
if (!retval)
timed_out = true;
} else {
/* wait till seek operation has completed */
timeout = jiffies + msecs_to_jiffies(seek_timeout);
do {
retval = si470x_get_register(radio, STATUSRSSI);
if (retval < 0)
goto stop;
timed_out = time_after(jiffies, timeout);
} while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
&& (!timed_out));
}
if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
dev_warn(&radio->videodev->dev, "seek does not complete\n");
if (radio->registers[STATUSRSSI] & STATUSRSSI_SF)
dev_warn(&radio->videodev->dev,
"seek failed / band limit reached\n");
if (timed_out)
dev_warn(&radio->videodev->dev,
"seek timed out after %u ms\n", seek_timeout);
stop:
/* stop seeking */
radio->registers[POWERCFG] &= ~POWERCFG_SEEK;
retval = si470x_set_register(radio, POWERCFG);
done:
/* try again, if timed out */
if ((retval == 0) && timed_out)
retval = -EAGAIN;
return retval;
}
/*
* si470x_set_seek - set seek
*/
static int si470x_set_seek(struct si470x_device *radio,
struct v4l2_hw_freq_seek *seek)
{
int band, retval;
unsigned int freq;
bool timed_out = 0;
/* set band */
if (seek->rangelow || seek->rangehigh) {
for (band = 0; band < ARRAY_SIZE(bands); band++) {
if (bands[band].rangelow == seek->rangelow &&
bands[band].rangehigh == seek->rangehigh)
break;
}
if (band == ARRAY_SIZE(bands))
return -EINVAL; /* No matching band found */
} else
band = 1; /* If nothing is specified seek 76 - 108 Mhz */
if (radio->band != band) {
retval = si470x_get_freq(radio, &freq);
if (retval)
return retval;
retval = si470x_set_band(radio, band);
if (retval)
return retval;
retval = si470x_set_freq(radio, freq);
if (retval)
return retval;
}
/* start seeking */
radio->registers[POWERCFG] |= POWERCFG_SEEK;
if (seek->wrap_around)
radio->registers[POWERCFG] &= ~POWERCFG_SKMODE;
else
radio->registers[POWERCFG] |= POWERCFG_SKMODE;
if (seek->seek_upward)
radio->registers[POWERCFG] |= POWERCFG_SEEKUP;
else
radio->registers[POWERCFG] &= ~POWERCFG_SEEKUP;
retval = si470x_set_register(radio, POWERCFG);
if (retval < 0)
return retval;
/* wait till tune operation has completed */
INIT_COMPLETION(radio->completion);
retval = wait_for_completion_timeout(&radio->completion,
msecs_to_jiffies(seek_timeout));
if (!retval)
timed_out = true;
if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
dev_warn(&radio->videodev.dev, "seek does not complete\n");
if (radio->registers[STATUSRSSI] & STATUSRSSI_SF)
dev_warn(&radio->videodev.dev,
"seek failed / band limit reached\n");
/* stop seeking */
radio->registers[POWERCFG] &= ~POWERCFG_SEEK;
retval = si470x_set_register(radio, POWERCFG);
/* try again, if timed out */
if (retval == 0 && timed_out)
return -ENODATA;
return retval;
}
