diff options
Diffstat (limited to 'drivers/media/radio/si470x/radio-si470x-common.c')
| -rw-r--r-- | drivers/media/radio/si470x/radio-si470x-common.c | 793 |
1 files changed, 793 insertions, 0 deletions
diff --git a/drivers/media/radio/si470x/radio-si470x-common.c b/drivers/media/radio/si470x/radio-si470x-common.c new file mode 100644 index 000000000..dc0c1d8d2 --- /dev/null +++ b/drivers/media/radio/si470x/radio-si470x-common.c @@ -0,0 +1,793 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * drivers/media/radio/si470x/radio-si470x-common.c + * + * Driver for radios with Silicon Labs Si470x FM Radio Receivers + * + * Copyright (c) 2009 Tobias Lorenz <tobias.lorenz@gmx.net> + * Copyright (c) 2012 Hans de Goede <hdegoede@redhat.com> + */ + + +/* + * History: + * 2008-01-12 Tobias Lorenz <tobias.lorenz@gmx.net> + * Version 1.0.0 + * - First working version + * 2008-01-13 Tobias Lorenz <tobias.lorenz@gmx.net> + * Version 1.0.1 + * - Improved error handling, every function now returns errno + * - Improved multi user access (start/mute/stop) + * - Channel doesn't get lost anymore after start/mute/stop + * - RDS support added (polling mode via interrupt EP 1) + * - marked default module parameters with *value* + * - switched from bit structs to bit masks + * - header file cleaned and integrated + * 2008-01-14 Tobias Lorenz <tobias.lorenz@gmx.net> + * Version 1.0.2 + * - hex values are now lower case + * - commented USB ID for ADS/Tech moved on todo list + * - blacklisted si470x in hid-quirks.c + * - rds buffer handling functions integrated into *_work, *_read + * - rds_command in si470x_poll exchanged against simple retval + * - check for firmware version 15 + * - code order and prototypes still remain the same + * - spacing and bottom of band codes remain the same + * 2008-01-16 Tobias Lorenz <tobias.lorenz@gmx.net> + * Version 1.0.3 + * - code reordered to avoid function prototypes + * - switch/case defaults are now more user-friendly + * - unified comment style + * - applied all checkpatch.pl v1.12 suggestions + * except the warning about the too long lines with bit comments + * - renamed FMRADIO to RADIO to cut line length (checkpatch.pl) + * 2008-01-22 Tobias Lorenz <tobias.lorenz@gmx.net> + * Version 1.0.4 + * - avoid poss. locking when doing copy_to_user which may sleep + * - RDS is automatically activated on read now + * - code cleaned of unnecessary rds_commands + * - USB Vendor/Product ID for ADS/Tech FM Radio Receiver verified + * (thanks to Guillaume RAMOUSSE) + * 2008-01-27 Tobias Lorenz <tobias.lorenz@gmx.net> + * Version 1.0.5 + * - number of seek_retries changed to tune_timeout + * - fixed problem with incomplete tune operations by own buffers + * - optimization of variables and printf types + * - improved error logging + * 2008-01-31 Tobias Lorenz <tobias.lorenz@gmx.net> + * Oliver Neukum <oliver@neukum.org> + * Version 1.0.6 + * - fixed coverity checker warnings in *_usb_driver_disconnect + * - probe()/open() race by correct ordering in probe() + * - DMA coherency rules by separate allocation of all buffers + * - use of endianness macros + * - abuse of spinlock, replaced by mutex + * - racy handling of timer in disconnect, + * replaced by delayed_work + * - racy interruptible_sleep_on(), + * replaced with wait_event_interruptible() + * - handle signals in read() + * 2008-02-08 Tobias Lorenz <tobias.lorenz@gmx.net> + * Oliver Neukum <oliver@neukum.org> + * Version 1.0.7 + * - usb autosuspend support + * - unplugging fixed + * 2008-05-07 Tobias Lorenz <tobias.lorenz@gmx.net> + * Version 1.0.8 + * - hardware frequency seek support + * - afc indication + * - more safety checks, let si470x_get_freq return errno + * - vidioc behavior corrected according to v4l2 spec + * 2008-10-20 Alexey Klimov <klimov.linux@gmail.com> + * - add support for KWorld USB FM Radio FM700 + * - blacklisted KWorld radio in hid-core.c and hid-ids.h + * 2008-12-03 Mark Lord <mlord@pobox.com> + * - add support for DealExtreme USB Radio + * 2009-01-31 Bob Ross <pigiron@gmx.com> + * - correction of stereo detection/setting + * - correction of signal strength indicator scaling + * 2009-01-31 Rick Bronson <rick@efn.org> + * Tobias Lorenz <tobias.lorenz@gmx.net> + * - add LED status output + * - get HW/SW version from scratchpad + * 2009-06-16 Edouard Lafargue <edouard@lafargue.name> + * Version 1.0.10 + * - add support for interrupt mode for RDS endpoint, + * instead of polling. + * Improves RDS reception significantly + */ + + +/* kernel includes */ +#include "radio-si470x.h" + +/************************************************************************** + * Module Parameters + **************************************************************************/ + +/* Spacing (kHz) */ +/* 0: 200 kHz (USA, Australia) */ +/* 1: 100 kHz (Europe, Japan) */ +/* 2: 50 kHz */ +static unsigned short space = 2; +module_param(space, ushort, 0444); +MODULE_PARM_DESC(space, "Spacing: 0=200kHz 1=100kHz *2=50kHz*"); + +/* De-emphasis */ +/* 0: 75 us (USA) */ +/* 1: 50 us (Europe, Australia, Japan) */ +static unsigned short de = 1; +module_param(de, ushort, 0444); +MODULE_PARM_DESC(de, "De-emphasis: 0=75us *1=50us*"); + +/* Tune timeout */ +static unsigned int tune_timeout = 3000; +module_param(tune_timeout, uint, 0644); +MODULE_PARM_DESC(tune_timeout, "Tune timeout: *3000*"); + +/* Seek timeout */ +static unsigned int seek_timeout = 5000; +module_param(seek_timeout, uint, 0644); +MODULE_PARM_DESC(seek_timeout, "Seek timeout: *5000*"); + +static const struct v4l2_frequency_band bands[] = { + { + .type = V4L2_TUNER_RADIO, + .index = 0, + .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO | + V4L2_TUNER_CAP_RDS | V4L2_TUNER_CAP_RDS_BLOCK_IO | + V4L2_TUNER_CAP_FREQ_BANDS | + V4L2_TUNER_CAP_HWSEEK_BOUNDED | + V4L2_TUNER_CAP_HWSEEK_WRAP, + .rangelow = 87500 * 16, + .rangehigh = 108000 * 16, + .modulation = V4L2_BAND_MODULATION_FM, + }, + { + .type = V4L2_TUNER_RADIO, + .index = 1, + .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO | + V4L2_TUNER_CAP_RDS | V4L2_TUNER_CAP_RDS_BLOCK_IO | + V4L2_TUNER_CAP_FREQ_BANDS | + V4L2_TUNER_CAP_HWSEEK_BOUNDED | + V4L2_TUNER_CAP_HWSEEK_WRAP, + .rangelow = 76000 * 16, + .rangehigh = 108000 * 16, + .modulation = V4L2_BAND_MODULATION_FM, + }, + { + .type = V4L2_TUNER_RADIO, + .index = 2, + .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO | + V4L2_TUNER_CAP_RDS | V4L2_TUNER_CAP_RDS_BLOCK_IO | + V4L2_TUNER_CAP_FREQ_BANDS | + V4L2_TUNER_CAP_HWSEEK_BOUNDED | + V4L2_TUNER_CAP_HWSEEK_WRAP, + .rangelow = 76000 * 16, + .rangehigh = 90000 * 16, + .modulation = V4L2_BAND_MODULATION_FM, + }, +}; + +/************************************************************************** + * Generic Functions + **************************************************************************/ + +/* + * 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 radio->set_register(radio, SYSCONFIG2); +} + +/* + * si470x_set_chan - set the channel + */ +static int si470x_set_chan(struct si470x_device *radio, unsigned short chan) +{ + int retval; + unsigned long time_left; + bool timed_out = false; + + retval = radio->get_register(radio, POWERCFG); + if (retval) + return retval; + + if ((radio->registers[POWERCFG] & (POWERCFG_ENABLE|POWERCFG_DMUTE)) + != (POWERCFG_ENABLE|POWERCFG_DMUTE)) { + return 0; + } + + /* start tuning */ + radio->registers[CHANNEL] &= ~CHANNEL_CHAN; + radio->registers[CHANNEL] |= CHANNEL_TUNE | chan; + retval = radio->set_register(radio, CHANNEL); + if (retval < 0) + goto done; + + /* wait till tune operation has completed */ + reinit_completion(&radio->completion); + time_left = wait_for_completion_timeout(&radio->completion, + msecs_to_jiffies(tune_timeout)); + if (time_left == 0) + 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 = radio->set_register(radio, CHANNEL); + +done: + return retval; +} + +/* + * si470x_get_step - get channel spacing + */ +static unsigned int si470x_get_step(struct si470x_device *radio) +{ + /* Spacing (kHz) */ + switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_SPACE) >> 4) { + /* 0: 200 kHz (USA, Australia) */ + case 0: + return 200 * 16; + /* 1: 100 kHz (Europe, Japan) */ + case 1: + return 100 * 16; + /* 2: 50 kHz */ + default: + return 50 * 16; + } +} + + +/* + * si470x_get_freq - get the frequency + */ +static int si470x_get_freq(struct si470x_device *radio, unsigned int *freq) +{ + int chan, retval; + + /* read channel */ + retval = radio->get_register(radio, READCHAN); + chan = radio->registers[READCHAN] & READCHAN_READCHAN; + + /* Frequency (MHz) = Spacing (kHz) x Channel + Bottom of Band (MHz) */ + *freq = chan * si470x_get_step(radio) + bands[radio->band].rangelow; + + return retval; +} + + +/* + * si470x_set_freq - set the frequency + */ +int si470x_set_freq(struct si470x_device *radio, unsigned int freq) +{ + unsigned short chan; + + freq = clamp(freq, bands[radio->band].rangelow, + bands[radio->band].rangehigh); + /* Chan = [ Freq (Mhz) - Bottom of Band (MHz) ] / Spacing (kHz) */ + chan = (freq - bands[radio->band].rangelow) / si470x_get_step(radio); + + return si470x_set_chan(radio, chan); +} +EXPORT_SYMBOL_GPL(si470x_set_freq); + + +/* + * si470x_set_seek - set seek + */ +static int si470x_set_seek(struct si470x_device *radio, + const struct v4l2_hw_freq_seek *seek) +{ + int band, retval; + unsigned int freq; + bool timed_out = false; + unsigned long time_left; + + /* 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 = radio->set_register(radio, POWERCFG); + if (retval < 0) + return retval; + + /* wait till tune operation has completed */ + reinit_completion(&radio->completion); + time_left = wait_for_completion_timeout(&radio->completion, + msecs_to_jiffies(seek_timeout)); + if (time_left == 0) + 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 = radio->set_register(radio, POWERCFG); + + /* try again, if timed out */ + if (retval == 0 && timed_out) + return -ENODATA; + return retval; +} + + +/* + * si470x_start - switch on radio + */ +int si470x_start(struct si470x_device *radio) +{ + int retval; + + /* powercfg */ + radio->registers[POWERCFG] = + POWERCFG_DMUTE | POWERCFG_ENABLE | POWERCFG_RDSM; + retval = radio->set_register(radio, POWERCFG); + if (retval < 0) + goto done; + + /* sysconfig 1 */ + radio->registers[SYSCONFIG1] |= SYSCONFIG1_RDSIEN | SYSCONFIG1_STCIEN | + SYSCONFIG1_RDS; + radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_GPIO2; + radio->registers[SYSCONFIG1] |= SYSCONFIG1_GPIO2_INT; + if (de) + radio->registers[SYSCONFIG1] |= SYSCONFIG1_DE; + retval = radio->set_register(radio, SYSCONFIG1); + if (retval < 0) + goto done; + + /* sysconfig 2 */ + radio->registers[SYSCONFIG2] = + (0x1f << 8) | /* SEEKTH */ + ((radio->band << 6) & SYSCONFIG2_BAND) |/* BAND */ + ((space << 4) & SYSCONFIG2_SPACE) | /* SPACE */ + 15; /* VOLUME (max) */ + retval = radio->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; +} +EXPORT_SYMBOL_GPL(si470x_start); + + +/* + * si470x_stop - switch off radio + */ +int si470x_stop(struct si470x_device *radio) +{ + int retval; + + /* sysconfig 1 */ + radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS; + retval = radio->set_register(radio, SYSCONFIG1); + if (retval < 0) + goto done; + + /* powercfg */ + radio->registers[POWERCFG] &= ~POWERCFG_DMUTE; + /* POWERCFG_ENABLE has to automatically go low */ + radio->registers[POWERCFG] |= POWERCFG_ENABLE | POWERCFG_DISABLE; + retval = radio->set_register(radio, POWERCFG); + +done: + return retval; +} +EXPORT_SYMBOL_GPL(si470x_stop); + + +/* + * 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 = radio->set_register(radio, SYSCONFIG1); + if (retval < 0) + radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS; + + return retval; +} + + + +/************************************************************************** + * File Operations Interface + **************************************************************************/ + +/* + * si470x_fops_read - read RDS data + */ +static ssize_t si470x_fops_read(struct file *file, char __user *buf, + size_t count, loff_t *ppos) +{ + struct si470x_device *radio = video_drvdata(file); + int retval = 0; + unsigned int block_count = 0; + + /* switch on rds reception */ + if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0) + si470x_rds_on(radio); + + /* block if no new data available */ + while (radio->wr_index == radio->rd_index) { + if (file->f_flags & O_NONBLOCK) { + retval = -EWOULDBLOCK; + goto done; + } + if (wait_event_interruptible(radio->read_queue, + radio->wr_index != radio->rd_index) < 0) { + retval = -EINTR; + goto done; + } + } + + /* calculate block count from byte count */ + count /= 3; + + /* copy RDS block out of internal buffer and to user buffer */ + while (block_count < count) { + if (radio->rd_index == radio->wr_index) + break; + + /* always transfer rds complete blocks */ + if (copy_to_user(buf, &radio->buffer[radio->rd_index], 3)) + /* retval = -EFAULT; */ + break; + + /* increment and wrap read pointer */ + radio->rd_index += 3; + if (radio->rd_index >= radio->buf_size) + radio->rd_index = 0; + + /* increment counters */ + block_count++; + buf += 3; + retval += 3; + } + +done: + return retval; +} + + +/* + * si470x_fops_poll - poll RDS data + */ +static __poll_t si470x_fops_poll(struct file *file, + struct poll_table_struct *pts) +{ + struct si470x_device *radio = video_drvdata(file); + __poll_t req_events = poll_requested_events(pts); + __poll_t retval = v4l2_ctrl_poll(file, pts); + + if (req_events & (EPOLLIN | EPOLLRDNORM)) { + /* switch on rds reception */ + if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0) + si470x_rds_on(radio); + + poll_wait(file, &radio->read_queue, pts); + + if (radio->rd_index != radio->wr_index) + retval |= EPOLLIN | EPOLLRDNORM; + } + + return retval; +} + + +static int si470x_fops_open(struct file *file) +{ + struct si470x_device *radio = video_drvdata(file); + + return radio->fops_open(file); +} + + +/* + * si470x_fops_release - file release + */ +static int si470x_fops_release(struct file *file) +{ + struct si470x_device *radio = video_drvdata(file); + + return radio->fops_release(file); +} + + +/* + * si470x_fops - file operations interface + */ +static const struct v4l2_file_operations si470x_fops = { + .owner = THIS_MODULE, + .read = si470x_fops_read, + .poll = si470x_fops_poll, + .unlocked_ioctl = video_ioctl2, + .open = si470x_fops_open, + .release = si470x_fops_release, +}; + + + +/************************************************************************** + * Video4Linux Interface + **************************************************************************/ + + +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 radio->set_register(radio, SYSCONFIG2); + case V4L2_CID_AUDIO_MUTE: + if (ctrl->val) + radio->registers[POWERCFG] &= ~POWERCFG_DMUTE; + else + radio->registers[POWERCFG] |= POWERCFG_DMUTE; + return radio->set_register(radio, POWERCFG); + default: + return -EINVAL; + } +} + + +/* + * si470x_vidioc_g_tuner - get tuner attributes + */ +static int si470x_vidioc_g_tuner(struct file *file, void *priv, + struct v4l2_tuner *tuner) +{ + struct si470x_device *radio = video_drvdata(file); + int retval = 0; + + if (tuner->index != 0) + return -EINVAL; + + if (!radio->status_rssi_auto_update) { + retval = radio->get_register(radio, STATUSRSSI); + if (retval < 0) + return retval; + } + + /* driver constants */ + strscpy(tuner->name, "FM", sizeof(tuner->name)); + tuner->type = V4L2_TUNER_RADIO; + tuner->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO | + V4L2_TUNER_CAP_RDS | V4L2_TUNER_CAP_RDS_BLOCK_IO | + V4L2_TUNER_CAP_HWSEEK_BOUNDED | + V4L2_TUNER_CAP_HWSEEK_WRAP; + tuner->rangelow = 76 * FREQ_MUL; + tuner->rangehigh = 108 * FREQ_MUL; + + /* stereo indicator == stereo (instead of mono) */ + if ((radio->registers[STATUSRSSI] & STATUSRSSI_ST) == 0) + tuner->rxsubchans = V4L2_TUNER_SUB_MONO; + else + tuner->rxsubchans = V4L2_TUNER_SUB_STEREO; + /* If there is a reliable method of detecting an RDS channel, + then this code should check for that before setting this + RDS subchannel. */ + tuner->rxsubchans |= V4L2_TUNER_SUB_RDS; + + /* mono/stereo selector */ + if ((radio->registers[POWERCFG] & POWERCFG_MONO) == 0) + tuner->audmode = V4L2_TUNER_MODE_STEREO; + else + tuner->audmode = V4L2_TUNER_MODE_MONO; + + /* min is worst, max is best; signal:0..0xffff; rssi: 0..0xff */ + /* measured in units of dbµV in 1 db increments (max at ~75 dbµV) */ + tuner->signal = (radio->registers[STATUSRSSI] & STATUSRSSI_RSSI); + /* the ideal factor is 0xffff/75 = 873,8 */ + tuner->signal = (tuner->signal * 873) + (8 * tuner->signal / 10); + if (tuner->signal > 0xffff) + tuner->signal = 0xffff; + + /* automatic frequency control: -1: freq to low, 1 freq to high */ + /* AFCRL does only indicate that freq. differs, not if too low/high */ + tuner->afc = (radio->registers[STATUSRSSI] & STATUSRSSI_AFCRL) ? 1 : 0; + + return retval; +} + + +/* + * si470x_vidioc_s_tuner - set tuner attributes + */ +static int si470x_vidioc_s_tuner(struct file *file, void *priv, + const 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 radio->set_register(radio, POWERCFG); +} + + +/* + * si470x_vidioc_g_frequency - get tuner or modulator radio frequency + */ +static int si470x_vidioc_g_frequency(struct file *file, void *priv, + struct v4l2_frequency *freq) +{ + struct si470x_device *radio = video_drvdata(file); + + if (freq->tuner != 0) + return -EINVAL; + + freq->type = V4L2_TUNER_RADIO; + return si470x_get_freq(radio, &freq->frequency); +} + + +/* + * si470x_vidioc_s_frequency - set tuner or modulator radio frequency + */ +static int si470x_vidioc_s_frequency(struct file *file, void *priv, + const struct v4l2_frequency *freq) +{ + struct si470x_device *radio = video_drvdata(file); + int retval; + + if (freq->tuner != 0) + return -EINVAL; + + if (freq->frequency < bands[radio->band].rangelow || + freq->frequency > bands[radio->band].rangehigh) { + /* Switch to band 1 which covers everything we support */ + retval = si470x_set_band(radio, 1); + if (retval) + return retval; + } + return si470x_set_freq(radio, freq->frequency); +} + + +/* + * si470x_vidioc_s_hw_freq_seek - set hardware frequency seek + */ +static int si470x_vidioc_s_hw_freq_seek(struct file *file, void *priv, + const struct v4l2_hw_freq_seek *seek) +{ + struct si470x_device *radio = video_drvdata(file); + + if (seek->tuner != 0) + return -EINVAL; + + if (file->f_flags & O_NONBLOCK) + return -EWOULDBLOCK; + + return si470x_set_seek(radio, seek); +} + +/* + * si470x_vidioc_enum_freq_bands - enumerate supported bands + */ +static int si470x_vidioc_enum_freq_bands(struct file *file, void *priv, + struct v4l2_frequency_band *band) +{ + if (band->tuner != 0) + return -EINVAL; + if (band->index >= ARRAY_SIZE(bands)) + return -EINVAL; + *band = bands[band->index]; + return 0; +} + +const struct v4l2_ctrl_ops si470x_ctrl_ops = { + .s_ctrl = si470x_s_ctrl, +}; +EXPORT_SYMBOL_GPL(si470x_ctrl_ops); + +static int si470x_vidioc_querycap(struct file *file, void *priv, + struct v4l2_capability *capability) +{ + struct si470x_device *radio = video_drvdata(file); + + return radio->vidioc_querycap(file, priv, capability); +}; + +/* + * si470x_ioctl_ops - video device ioctl operations + */ +static const struct v4l2_ioctl_ops si470x_ioctl_ops = { + .vidioc_querycap = si470x_vidioc_querycap, + .vidioc_g_tuner = si470x_vidioc_g_tuner, + .vidioc_s_tuner = si470x_vidioc_s_tuner, + .vidioc_g_frequency = si470x_vidioc_g_frequency, + .vidioc_s_frequency = si470x_vidioc_s_frequency, + .vidioc_s_hw_freq_seek = si470x_vidioc_s_hw_freq_seek, + .vidioc_enum_freq_bands = si470x_vidioc_enum_freq_bands, + .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, + .vidioc_unsubscribe_event = v4l2_event_unsubscribe, +}; + + +/* + * si470x_viddev_template - video device interface + */ +const struct video_device si470x_viddev_template = { + .fops = &si470x_fops, + .name = DRIVER_NAME, + .release = video_device_release_empty, + .ioctl_ops = &si470x_ioctl_ops, +}; +EXPORT_SYMBOL_GPL(si470x_viddev_template); + +MODULE_LICENSE("GPL"); |