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Diffstat (limited to 'drivers/media/radio/si470x/radio-si470x-common.c')
-rw-r--r--drivers/media/radio/si470x/radio-si470x-common.c798
1 files changed, 798 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 000000000000..f33315f2c543
--- /dev/null
+++ b/drivers/media/radio/si470x/radio-si470x-common.c
@@ -0,0 +1,798 @@
+/*
+ * 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>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+
+/*
+ * 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*");
+
+/* Bottom of Band (MHz) */
+/* 0: 87.5 - 108 MHz (USA, Europe)*/
+/* 1: 76 - 108 MHz (Japan wide band) */
+/* 2: 76 - 90 MHz (Japan) */
+static unsigned short band = 1;
+module_param(band, ushort, 0444);
+MODULE_PARM_DESC(band, "Band: 0=87.5..108MHz *1=76..108MHz* 2=76..90MHz");
+
+/* 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*");
+
+
+
+/**************************************************************************
+ * Generic Functions
+ **************************************************************************/
+
+/*
+ * 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_get_freq - get the frequency
+ */
+static int si470x_get_freq(struct si470x_device *radio, unsigned int *freq)
+{
+ unsigned int spacing, band_bottom;
+ unsigned short chan;
+ int retval;
+
+ /* Spacing (kHz) */
+ switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_SPACE) >> 4) {
+ /* 0: 200 kHz (USA, Australia) */
+ case 0:
+ spacing = 0.200 * FREQ_MUL; break;
+ /* 1: 100 kHz (Europe, Japan) */
+ case 1:
+ spacing = 0.100 * FREQ_MUL; break;
+ /* 2: 50 kHz */
+ default:
+ spacing = 0.050 * FREQ_MUL; break;
+ };
+
+ /* Bottom of Band (MHz) */
+ switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) {
+ /* 0: 87.5 - 108 MHz (USA, Europe) */
+ case 0:
+ band_bottom = 87.5 * FREQ_MUL; break;
+ /* 1: 76 - 108 MHz (Japan wide band) */
+ default:
+ band_bottom = 76 * FREQ_MUL; break;
+ /* 2: 76 - 90 MHz (Japan) */
+ case 2:
+ band_bottom = 76 * FREQ_MUL; break;
+ };
+
+ /* read channel */
+ retval = si470x_get_register(radio, READCHAN);
+ chan = radio->registers[READCHAN] & READCHAN_READCHAN;
+
+ /* Frequency (MHz) = Spacing (kHz) x Channel + Bottom of Band (MHz) */
+ *freq = chan * spacing + band_bottom;
+
+ return retval;
+}
+
+
+/*
+ * si470x_set_freq - set the frequency
+ */
+int si470x_set_freq(struct si470x_device *radio, unsigned int freq)
+{
+ unsigned int spacing, band_bottom;
+ unsigned short chan;
+
+ /* Spacing (kHz) */
+ switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_SPACE) >> 4) {
+ /* 0: 200 kHz (USA, Australia) */
+ case 0:
+ spacing = 0.200 * FREQ_MUL; break;
+ /* 1: 100 kHz (Europe, Japan) */
+ case 1:
+ spacing = 0.100 * FREQ_MUL; break;
+ /* 2: 50 kHz */
+ default:
+ spacing = 0.050 * FREQ_MUL; break;
+ };
+
+ /* Bottom of Band (MHz) */
+ switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) {
+ /* 0: 87.5 - 108 MHz (USA, Europe) */
+ case 0:
+ band_bottom = 87.5 * FREQ_MUL; break;
+ /* 1: 76 - 108 MHz (Japan wide band) */
+ default:
+ band_bottom = 76 * FREQ_MUL; break;
+ /* 2: 76 - 90 MHz (Japan) */
+ case 2:
+ band_bottom = 76 * FREQ_MUL; break;
+ };
+
+ /* Chan = [ Freq (Mhz) - Bottom of Band (MHz) ] / Spacing (kHz) */
+ chan = (freq - band_bottom) / spacing;
+
+ return si470x_set_chan(radio, chan);
+}
+
+
+/*
+ * 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)
+ 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_start - switch on radio
+ */
+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_stop - switch off radio
+ */
+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)
+ goto done;
+
+ /* powercfg */
+ radio->registers[POWERCFG] &= ~POWERCFG_DMUTE;
+ /* POWERCFG_ENABLE has to automatically go low */
+ radio->registers[POWERCFG] |= POWERCFG_ENABLE | POWERCFG_DISABLE;
+ retval = si470x_set_register(radio, POWERCFG);
+
+done:
+ return retval;
+}
+
+
+/*
+ * 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;
+}
+
+
+
+/**************************************************************************
+ * Video4Linux Interface
+ **************************************************************************/
+
+/*
+ * si470x_vidioc_queryctrl - enumerate control items
+ */
+static int si470x_vidioc_queryctrl(struct file *file, void *priv,
+ struct v4l2_queryctrl *qc)
+{
+ struct si470x_device *radio = video_drvdata(file);
+ int retval = -EINVAL;
+
+ /* abort if qc->id is below V4L2_CID_BASE */
+ if (qc->id < V4L2_CID_BASE)
+ goto done;
+
+ /* search video control */
+ switch (qc->id) {
+ case V4L2_CID_AUDIO_VOLUME:
+ return v4l2_ctrl_query_fill(qc, 0, 15, 1, 15);
+ case V4L2_CID_AUDIO_MUTE:
+ return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
+ }
+
+ /* disable unsupported base controls */
+ /* to satisfy kradio and such apps */
+ if ((retval == -EINVAL) && (qc->id < V4L2_CID_LASTP1)) {
+ qc->flags = V4L2_CTRL_FLAG_DISABLED;
+ retval = 0;
+ }
+
+done:
+ if (retval < 0)
+ dev_warn(&radio->videodev->dev,
+ "query controls failed with %d\n", retval);
+ return retval;
+}
+
+
+/*
+ * si470x_vidioc_g_ctrl - get the value of a control
+ */
+static int si470x_vidioc_g_ctrl(struct file *file, void *priv,
+ struct v4l2_control *ctrl)
+{
+ struct si470x_device *radio = video_drvdata(file);
+ int retval = 0;
+
+ /* safety checks */
+ retval = si470x_disconnect_check(radio);
+ if (retval)
+ goto done;
+
+ switch (ctrl->id) {
+ case V4L2_CID_AUDIO_VOLUME:
+ ctrl->value = radio->registers[SYSCONFIG2] &
+ SYSCONFIG2_VOLUME;
+ break;
+ case V4L2_CID_AUDIO_MUTE:
+ ctrl->value = ((radio->registers[POWERCFG] &
+ POWERCFG_DMUTE) == 0) ? 1 : 0;
+ break;
+ default:
+ retval = -EINVAL;
+ }
+
+done:
+ if (retval < 0)
+ dev_warn(&radio->videodev->dev,
+ "get control failed with %d\n", retval);
+ 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;
+
+ /* 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);
+ return retval;
+}
+
+
+/*
+ * si470x_vidioc_g_audio - get audio attributes
+ */
+static int si470x_vidioc_g_audio(struct file *file, void *priv,
+ struct v4l2_audio *audio)
+{
+ /* driver constants */
+ audio->index = 0;
+ strcpy(audio->name, "Radio");
+ audio->capability = V4L2_AUDCAP_STEREO;
+ audio->mode = 0;
+
+ return 0;
+}
+
+
+/*
+ * 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;
+
+ /* safety checks */
+ retval = si470x_disconnect_check(radio);
+ if (retval)
+ goto done;
+
+ if (tuner->index != 0) {
+ retval = -EINVAL;
+ goto done;
+ }
+
+ retval = si470x_get_register(radio, STATUSRSSI);
+ if (retval < 0)
+ goto done;
+
+ /* driver constants */
+ strcpy(tuner->name, "FM");
+ tuner->type = V4L2_TUNER_RADIO;
+#if defined(CONFIG_USB_SI470X) || defined(CONFIG_USB_SI470X_MODULE)
+ tuner->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
+ V4L2_TUNER_CAP_RDS;
+#else
+ tuner->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
+#endif
+
+ /* range limits */
+ switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) {
+ /* 0: 87.5 - 108 MHz (USA, Europe, default) */
+ default:
+ tuner->rangelow = 87.5 * FREQ_MUL;
+ tuner->rangehigh = 108 * FREQ_MUL;
+ break;
+ /* 1: 76 - 108 MHz (Japan wide band) */
+ case 1:
+ tuner->rangelow = 76 * FREQ_MUL;
+ tuner->rangehigh = 108 * FREQ_MUL;
+ break;
+ /* 2: 76 - 90 MHz (Japan) */
+ case 2:
+ tuner->rangelow = 76 * FREQ_MUL;
+ tuner->rangehigh = 90 * FREQ_MUL;
+ break;
+ };
+
+ /* 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_MONO | V4L2_TUNER_SUB_STEREO;
+#if defined(CONFIG_USB_SI470X) || defined(CONFIG_USB_SI470X_MODULE)
+ /* 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;
+#endif
+
+ /* 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 db쨉V in 1 db increments (max at ~75 db쨉V) */
+ tuner->signal = (radio->registers[STATUSRSSI] & STATUSRSSI_RSSI);
+ /* the ideal factor is 0xffff/75 = 873,8 */
+ tuner->signal = (tuner->signal * 873) + (8 * tuner->signal / 10);
+
+ /* 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;
+
+done:
+ if (retval < 0)
+ dev_warn(&radio->videodev->dev,
+ "get 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);
+ int retval = -EINVAL;
+
+ /* 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);
+ return retval;
+}
+
+
+/*
+ * 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);
+ int retval = 0;
+
+ /* safety checks */
+ retval = si470x_disconnect_check(radio);
+ if (retval)
+ goto done;
+
+ if (freq->tuner != 0) {
+ retval = -EINVAL;
+ goto done;
+ }
+
+ freq->type = V4L2_TUNER_RADIO;
+ retval = si470x_get_freq(radio, &freq->frequency);
+
+done:
+ if (retval < 0)
+ dev_warn(&radio->videodev->dev,
+ "get frequency failed with %d\n", retval);
+ return retval;
+}
+
+
+/*
+ * si470x_vidioc_s_frequency - set tuner or modulator radio frequency
+ */
+static int si470x_vidioc_s_frequency(struct file *file, void *priv,
+ struct v4l2_frequency *freq)
+{
+ struct si470x_device *radio = video_drvdata(file);
+ int retval = 0;
+
+ /* safety checks */
+ retval = si470x_disconnect_check(radio);
+ if (retval)
+ goto done;
+
+ if (freq->tuner != 0) {
+ retval = -EINVAL;
+ goto done;
+ }
+
+ retval = si470x_set_freq(radio, freq->frequency);
+
+done:
+ if (retval < 0)
+ dev_warn(&radio->videodev->dev,
+ "set frequency failed with %d\n", retval);
+ return retval;
+}
+
+
+/*
+ * si470x_vidioc_s_hw_freq_seek - set hardware frequency seek
+ */
+static int si470x_vidioc_s_hw_freq_seek(struct file *file, void *priv,
+ struct v4l2_hw_freq_seek *seek)
+{
+ struct si470x_device *radio = video_drvdata(file);
+ int retval = 0;
+
+ /* safety checks */
+ retval = si470x_disconnect_check(radio);
+ if (retval)
+ goto done;
+
+ if (seek->tuner != 0) {
+ retval = -EINVAL;
+ goto done;
+ }
+
+ retval = si470x_set_seek(radio, seek->wrap_around, seek->seek_upward);
+
+done:
+ if (retval < 0)
+ dev_warn(&radio->videodev->dev,
+ "set hardware frequency seek failed with %d\n", retval);
+ return retval;
+}
+
+
+/*
+ * si470x_ioctl_ops - video device ioctl operations
+ */
+static const struct v4l2_ioctl_ops si470x_ioctl_ops = {
+ .vidioc_querycap = si470x_vidioc_querycap,
+ .vidioc_queryctrl = si470x_vidioc_queryctrl,
+ .vidioc_g_ctrl = si470x_vidioc_g_ctrl,
+ .vidioc_s_ctrl = si470x_vidioc_s_ctrl,
+ .vidioc_g_audio = si470x_vidioc_g_audio,
+ .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,
+};
+
+
+/*
+ * si470x_viddev_template - video device interface
+ */
+struct video_device si470x_viddev_template = {
+ .fops = &si470x_fops,
+ .name = DRIVER_NAME,
+ .release = video_device_release,
+ .ioctl_ops = &si470x_ioctl_ops,
+};
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-07-09 05:01:15 +0200