diff options
Diffstat (limited to 'drivers/media/platform/vivid/vivid-radio-common.c')
| -rw-r--r-- | drivers/media/platform/vivid/vivid-radio-common.c | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/drivers/media/platform/vivid/vivid-radio-common.c b/drivers/media/platform/vivid/vivid-radio-common.c deleted file mode 100644 index 138c7bce68b1..000000000000 --- a/drivers/media/platform/vivid/vivid-radio-common.c +++ /dev/null @@ -1,177 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * vivid-radio-common.c - common radio rx/tx support functions. - * - * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved. - */ - -#include <linux/errno.h> -#include <linux/kernel.h> -#include <linux/delay.h> -#include <linux/videodev2.h> - -#include "vivid-core.h" -#include "vivid-ctrls.h" -#include "vivid-radio-common.h" -#include "vivid-rds-gen.h" - -/* - * These functions are shared between the vivid receiver and transmitter - * since both use the same frequency bands. - */ - -const struct v4l2_frequency_band vivid_radio_bands[TOT_BANDS] = { - /* Band FM */ - { - .type = V4L2_TUNER_RADIO, - .index = 0, - .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO | - V4L2_TUNER_CAP_FREQ_BANDS, - .rangelow = FM_FREQ_RANGE_LOW, - .rangehigh = FM_FREQ_RANGE_HIGH, - .modulation = V4L2_BAND_MODULATION_FM, - }, - /* Band AM */ - { - .type = V4L2_TUNER_RADIO, - .index = 1, - .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_FREQ_BANDS, - .rangelow = AM_FREQ_RANGE_LOW, - .rangehigh = AM_FREQ_RANGE_HIGH, - .modulation = V4L2_BAND_MODULATION_AM, - }, - /* Band SW */ - { - .type = V4L2_TUNER_RADIO, - .index = 2, - .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_FREQ_BANDS, - .rangelow = SW_FREQ_RANGE_LOW, - .rangehigh = SW_FREQ_RANGE_HIGH, - .modulation = V4L2_BAND_MODULATION_AM, - }, -}; - -/* - * Initialize the RDS generator. If we can loop, then the RDS generator - * is set up with the values from the RDS TX controls, otherwise it - * will fill in standard values using one of two alternates. - */ -void vivid_radio_rds_init(struct vivid_dev *dev) -{ - struct vivid_rds_gen *rds = &dev->rds_gen; - bool alt = dev->radio_rx_rds_use_alternates; - - /* Do nothing, blocks will be filled by the transmitter */ - if (dev->radio_rds_loop && !dev->radio_tx_rds_controls) - return; - - if (dev->radio_rds_loop) { - v4l2_ctrl_lock(dev->radio_tx_rds_pi); - rds->picode = dev->radio_tx_rds_pi->cur.val; - rds->pty = dev->radio_tx_rds_pty->cur.val; - rds->mono_stereo = dev->radio_tx_rds_mono_stereo->cur.val; - rds->art_head = dev->radio_tx_rds_art_head->cur.val; - rds->compressed = dev->radio_tx_rds_compressed->cur.val; - rds->dyn_pty = dev->radio_tx_rds_dyn_pty->cur.val; - rds->ta = dev->radio_tx_rds_ta->cur.val; - rds->tp = dev->radio_tx_rds_tp->cur.val; - rds->ms = dev->radio_tx_rds_ms->cur.val; - strscpy(rds->psname, - dev->radio_tx_rds_psname->p_cur.p_char, - sizeof(rds->psname)); - strscpy(rds->radiotext, - dev->radio_tx_rds_radiotext->p_cur.p_char + alt * 64, - sizeof(rds->radiotext)); - v4l2_ctrl_unlock(dev->radio_tx_rds_pi); - } else { - vivid_rds_gen_fill(rds, dev->radio_rx_freq, alt); - } - if (dev->radio_rx_rds_controls) { - v4l2_ctrl_s_ctrl(dev->radio_rx_rds_pty, rds->pty); - v4l2_ctrl_s_ctrl(dev->radio_rx_rds_ta, rds->ta); - v4l2_ctrl_s_ctrl(dev->radio_rx_rds_tp, rds->tp); - v4l2_ctrl_s_ctrl(dev->radio_rx_rds_ms, rds->ms); - v4l2_ctrl_s_ctrl_string(dev->radio_rx_rds_psname, rds->psname); - v4l2_ctrl_s_ctrl_string(dev->radio_rx_rds_radiotext, rds->radiotext); - if (!dev->radio_rds_loop) - dev->radio_rx_rds_use_alternates = !dev->radio_rx_rds_use_alternates; - } - vivid_rds_generate(rds); -} - -/* - * Calculate the emulated signal quality taking into account the frequency - * the transmitter is using. - */ -static void vivid_radio_calc_sig_qual(struct vivid_dev *dev) -{ - int mod = 16000; - int delta = 800; - int sig_qual, sig_qual_tx = mod; - - /* - * For SW and FM there is a channel every 1000 kHz, for AM there is one - * every 100 kHz. - */ - if (dev->radio_rx_freq <= AM_FREQ_RANGE_HIGH) { - mod /= 10; - delta /= 10; - } - sig_qual = (dev->radio_rx_freq + delta) % mod - delta; - if (dev->has_radio_tx) - sig_qual_tx = dev->radio_rx_freq - dev->radio_tx_freq; - if (abs(sig_qual_tx) <= abs(sig_qual)) { - sig_qual = sig_qual_tx; - /* - * Zero the internal rds buffer if we are going to loop - * rds blocks. - */ - if (!dev->radio_rds_loop && !dev->radio_tx_rds_controls) - memset(dev->rds_gen.data, 0, - sizeof(dev->rds_gen.data)); - dev->radio_rds_loop = dev->radio_rx_freq >= FM_FREQ_RANGE_LOW; - } else { - dev->radio_rds_loop = false; - } - if (dev->radio_rx_freq <= AM_FREQ_RANGE_HIGH) - sig_qual *= 10; - dev->radio_rx_sig_qual = sig_qual; -} - -int vivid_radio_g_frequency(struct file *file, const unsigned *pfreq, struct v4l2_frequency *vf) -{ - if (vf->tuner != 0) - return -EINVAL; - vf->frequency = *pfreq; - return 0; -} - -int vivid_radio_s_frequency(struct file *file, unsigned *pfreq, const struct v4l2_frequency *vf) -{ - struct vivid_dev *dev = video_drvdata(file); - unsigned freq; - unsigned band; - - if (vf->tuner != 0) - return -EINVAL; - - if (vf->frequency >= (FM_FREQ_RANGE_LOW + SW_FREQ_RANGE_HIGH) / 2) - band = BAND_FM; - else if (vf->frequency <= (AM_FREQ_RANGE_HIGH + SW_FREQ_RANGE_LOW) / 2) - band = BAND_AM; - else - band = BAND_SW; - - freq = clamp_t(u32, vf->frequency, vivid_radio_bands[band].rangelow, - vivid_radio_bands[band].rangehigh); - *pfreq = freq; - - /* - * For both receiver and transmitter recalculate the signal quality - * (since that depends on both frequencies) and re-init the rds - * generator. - */ - vivid_radio_calc_sig_qual(dev); - vivid_radio_rds_init(dev); - return 0; -} |