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1529 lines
39 KiB
1529 lines
39 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* drivers/media/radio/radio-si476x.c -- V4L2 driver for SI476X chips |
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* |
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* Copyright (C) 2012 Innovative Converged Devices(ICD) |
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* Copyright (C) 2013 Andrey Smirnov |
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* |
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* Author: Andrey Smirnov <[email protected]> |
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*/ |
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|
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#include <linux/module.h> |
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#include <linux/delay.h> |
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#include <linux/interrupt.h> |
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#include <linux/slab.h> |
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#include <linux/atomic.h> |
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#include <linux/videodev2.h> |
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#include <linux/mutex.h> |
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#include <linux/debugfs.h> |
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#include <media/v4l2-common.h> |
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#include <media/v4l2-ioctl.h> |
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#include <media/v4l2-ctrls.h> |
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#include <media/v4l2-event.h> |
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#include <media/v4l2-device.h> |
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#include <media/drv-intf/si476x.h> |
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#include <linux/mfd/si476x-core.h> |
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#define FM_FREQ_RANGE_LOW 64000000 |
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#define FM_FREQ_RANGE_HIGH 108000000 |
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#define AM_FREQ_RANGE_LOW 520000 |
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#define AM_FREQ_RANGE_HIGH 30000000 |
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#define PWRLINEFLTR (1 << 8) |
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#define FREQ_MUL (10000000 / 625) |
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#define SI476X_PHDIV_STATUS_LINK_LOCKED(status) (0x80 & (status)) |
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#define DRIVER_NAME "si476x-radio" |
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#define DRIVER_CARD "SI476x AM/FM Receiver" |
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enum si476x_freq_bands { |
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SI476X_BAND_FM, |
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SI476X_BAND_AM, |
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}; |
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static const struct v4l2_frequency_band si476x_bands[] = { |
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[SI476X_BAND_FM] = { |
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.type = V4L2_TUNER_RADIO, |
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.index = SI476X_BAND_FM, |
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.capability = V4L2_TUNER_CAP_LOW |
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| V4L2_TUNER_CAP_STEREO |
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| V4L2_TUNER_CAP_RDS |
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| V4L2_TUNER_CAP_RDS_BLOCK_IO |
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| V4L2_TUNER_CAP_FREQ_BANDS, |
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.rangelow = 64 * FREQ_MUL, |
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.rangehigh = 108 * FREQ_MUL, |
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.modulation = V4L2_BAND_MODULATION_FM, |
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}, |
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[SI476X_BAND_AM] = { |
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.type = V4L2_TUNER_RADIO, |
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.index = SI476X_BAND_AM, |
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.capability = V4L2_TUNER_CAP_LOW |
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| V4L2_TUNER_CAP_FREQ_BANDS, |
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.rangelow = 0.52 * FREQ_MUL, |
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.rangehigh = 30 * FREQ_MUL, |
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.modulation = V4L2_BAND_MODULATION_AM, |
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}, |
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}; |
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static inline bool si476x_radio_freq_is_inside_of_the_band(u32 freq, int band) |
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{ |
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return freq >= si476x_bands[band].rangelow && |
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freq <= si476x_bands[band].rangehigh; |
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} |
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static inline bool si476x_radio_range_is_inside_of_the_band(u32 low, u32 high, |
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int band) |
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{ |
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return low >= si476x_bands[band].rangelow && |
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high <= si476x_bands[band].rangehigh; |
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} |
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static int si476x_radio_s_ctrl(struct v4l2_ctrl *ctrl); |
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static int si476x_radio_g_volatile_ctrl(struct v4l2_ctrl *ctrl); |
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enum phase_diversity_modes_idx { |
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SI476X_IDX_PHDIV_DISABLED, |
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SI476X_IDX_PHDIV_PRIMARY_COMBINING, |
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SI476X_IDX_PHDIV_PRIMARY_ANTENNA, |
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SI476X_IDX_PHDIV_SECONDARY_ANTENNA, |
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SI476X_IDX_PHDIV_SECONDARY_COMBINING, |
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}; |
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static const char * const phase_diversity_modes[] = { |
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[SI476X_IDX_PHDIV_DISABLED] = "Disabled", |
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[SI476X_IDX_PHDIV_PRIMARY_COMBINING] = "Primary with Secondary", |
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[SI476X_IDX_PHDIV_PRIMARY_ANTENNA] = "Primary Antenna", |
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[SI476X_IDX_PHDIV_SECONDARY_ANTENNA] = "Secondary Antenna", |
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[SI476X_IDX_PHDIV_SECONDARY_COMBINING] = "Secondary with Primary", |
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}; |
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static inline enum phase_diversity_modes_idx |
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si476x_phase_diversity_mode_to_idx(enum si476x_phase_diversity_mode mode) |
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{ |
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switch (mode) { |
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default: |
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fallthrough; |
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case SI476X_PHDIV_DISABLED: |
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return SI476X_IDX_PHDIV_DISABLED; |
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case SI476X_PHDIV_PRIMARY_COMBINING: |
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return SI476X_IDX_PHDIV_PRIMARY_COMBINING; |
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case SI476X_PHDIV_PRIMARY_ANTENNA: |
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return SI476X_IDX_PHDIV_PRIMARY_ANTENNA; |
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case SI476X_PHDIV_SECONDARY_ANTENNA: |
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return SI476X_IDX_PHDIV_SECONDARY_ANTENNA; |
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case SI476X_PHDIV_SECONDARY_COMBINING: |
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return SI476X_IDX_PHDIV_SECONDARY_COMBINING; |
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} |
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} |
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static inline enum si476x_phase_diversity_mode |
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si476x_phase_diversity_idx_to_mode(enum phase_diversity_modes_idx idx) |
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{ |
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static const int idx_to_value[] = { |
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[SI476X_IDX_PHDIV_DISABLED] = SI476X_PHDIV_DISABLED, |
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[SI476X_IDX_PHDIV_PRIMARY_COMBINING] = SI476X_PHDIV_PRIMARY_COMBINING, |
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[SI476X_IDX_PHDIV_PRIMARY_ANTENNA] = SI476X_PHDIV_PRIMARY_ANTENNA, |
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[SI476X_IDX_PHDIV_SECONDARY_ANTENNA] = SI476X_PHDIV_SECONDARY_ANTENNA, |
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[SI476X_IDX_PHDIV_SECONDARY_COMBINING] = SI476X_PHDIV_SECONDARY_COMBINING, |
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}; |
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return idx_to_value[idx]; |
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} |
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static const struct v4l2_ctrl_ops si476x_ctrl_ops = { |
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.g_volatile_ctrl = si476x_radio_g_volatile_ctrl, |
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.s_ctrl = si476x_radio_s_ctrl, |
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}; |
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enum si476x_ctrl_idx { |
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SI476X_IDX_RSSI_THRESHOLD, |
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SI476X_IDX_SNR_THRESHOLD, |
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SI476X_IDX_MAX_TUNE_ERROR, |
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SI476X_IDX_HARMONICS_COUNT, |
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SI476X_IDX_DIVERSITY_MODE, |
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SI476X_IDX_INTERCHIP_LINK, |
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}; |
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static struct v4l2_ctrl_config si476x_ctrls[] = { |
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|
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/* |
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* SI476X during its station seeking(or tuning) process uses several |
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* parameters to determine if "the station" is valid: |
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* |
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* - Signal's SNR(in dBuV) must be lower than |
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* #V4L2_CID_SI476X_SNR_THRESHOLD |
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* - Signal's RSSI(in dBuV) must be greater than |
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* #V4L2_CID_SI476X_RSSI_THRESHOLD |
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* - Signal's frequency deviation(in units of 2ppm) must not be |
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* more than #V4L2_CID_SI476X_MAX_TUNE_ERROR |
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*/ |
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[SI476X_IDX_RSSI_THRESHOLD] = { |
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.ops = &si476x_ctrl_ops, |
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.id = V4L2_CID_SI476X_RSSI_THRESHOLD, |
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.name = "Valid RSSI Threshold", |
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.type = V4L2_CTRL_TYPE_INTEGER, |
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.min = -128, |
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.max = 127, |
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.step = 1, |
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}, |
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[SI476X_IDX_SNR_THRESHOLD] = { |
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.ops = &si476x_ctrl_ops, |
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.id = V4L2_CID_SI476X_SNR_THRESHOLD, |
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.type = V4L2_CTRL_TYPE_INTEGER, |
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.name = "Valid SNR Threshold", |
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.min = -128, |
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.max = 127, |
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.step = 1, |
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}, |
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[SI476X_IDX_MAX_TUNE_ERROR] = { |
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.ops = &si476x_ctrl_ops, |
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.id = V4L2_CID_SI476X_MAX_TUNE_ERROR, |
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.type = V4L2_CTRL_TYPE_INTEGER, |
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.name = "Max Tune Errors", |
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.min = 0, |
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.max = 126 * 2, |
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.step = 2, |
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}, |
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/* |
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* #V4L2_CID_SI476X_HARMONICS_COUNT -- number of harmonics |
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* built-in power-line noise supression filter is to reject |
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* during AM-mode operation. |
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*/ |
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[SI476X_IDX_HARMONICS_COUNT] = { |
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.ops = &si476x_ctrl_ops, |
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.id = V4L2_CID_SI476X_HARMONICS_COUNT, |
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.type = V4L2_CTRL_TYPE_INTEGER, |
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.name = "Count of Harmonics to Reject", |
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.min = 0, |
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.max = 20, |
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.step = 1, |
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}, |
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/* |
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* #V4L2_CID_SI476X_DIVERSITY_MODE -- configuration which |
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* two tuners working in diversity mode are to work in. |
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* |
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* - #SI476X_IDX_PHDIV_DISABLED diversity mode disabled |
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* - #SI476X_IDX_PHDIV_PRIMARY_COMBINING diversity mode is |
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* on, primary tuner's antenna is the main one. |
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* - #SI476X_IDX_PHDIV_PRIMARY_ANTENNA diversity mode is |
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* off, primary tuner's antenna is the main one. |
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* - #SI476X_IDX_PHDIV_SECONDARY_ANTENNA diversity mode is |
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* off, secondary tuner's antenna is the main one. |
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* - #SI476X_IDX_PHDIV_SECONDARY_COMBINING diversity mode is |
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* on, secondary tuner's antenna is the main one. |
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*/ |
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[SI476X_IDX_DIVERSITY_MODE] = { |
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.ops = &si476x_ctrl_ops, |
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.id = V4L2_CID_SI476X_DIVERSITY_MODE, |
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.type = V4L2_CTRL_TYPE_MENU, |
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.name = "Phase Diversity Mode", |
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.qmenu = phase_diversity_modes, |
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.min = 0, |
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.max = ARRAY_SIZE(phase_diversity_modes) - 1, |
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}, |
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/* |
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* #V4L2_CID_SI476X_INTERCHIP_LINK -- inter-chip link in |
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* diversity mode indicator. Allows user to determine if two |
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* chips working in diversity mode have established a link |
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* between each other and if the system as a whole uses |
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* signals from both antennas to receive FM radio. |
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*/ |
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[SI476X_IDX_INTERCHIP_LINK] = { |
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.ops = &si476x_ctrl_ops, |
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.id = V4L2_CID_SI476X_INTERCHIP_LINK, |
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.type = V4L2_CTRL_TYPE_BOOLEAN, |
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.flags = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_VOLATILE, |
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.name = "Inter-Chip Link", |
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.min = 0, |
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.max = 1, |
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.step = 1, |
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}, |
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}; |
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struct si476x_radio; |
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/** |
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* struct si476x_radio_ops - vtable of tuner functions |
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* |
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* This table holds pointers to functions implementing particular |
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* operations depending on the mode in which the tuner chip was |
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* configured to start. If the function is not supported |
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* corresponding element is set to #NULL. |
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* |
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* @tune_freq: Tune chip to a specific frequency |
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* @seek_start: Star station seeking |
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* @rsq_status: Get Received Signal Quality(RSQ) status |
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* @rds_blckcnt: Get received RDS blocks count |
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* @phase_diversity: Change phase diversity mode of the tuner |
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* @phase_div_status: Get phase diversity mode status |
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* @acf_status: Get the status of Automatically Controlled |
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* Features(ACF) |
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* @agc_status: Get Automatic Gain Control(AGC) status |
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*/ |
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struct si476x_radio_ops { |
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int (*tune_freq)(struct si476x_core *, struct si476x_tune_freq_args *); |
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int (*seek_start)(struct si476x_core *, bool, bool); |
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int (*rsq_status)(struct si476x_core *, struct si476x_rsq_status_args *, |
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struct si476x_rsq_status_report *); |
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int (*rds_blckcnt)(struct si476x_core *, bool, |
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struct si476x_rds_blockcount_report *); |
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int (*phase_diversity)(struct si476x_core *, |
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enum si476x_phase_diversity_mode); |
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int (*phase_div_status)(struct si476x_core *); |
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int (*acf_status)(struct si476x_core *, |
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struct si476x_acf_status_report *); |
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int (*agc_status)(struct si476x_core *, |
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struct si476x_agc_status_report *); |
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}; |
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/** |
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* struct si476x_radio - radio device |
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* |
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* @v4l2dev: Pointer to V4L2 device created by V4L2 subsystem |
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* @videodev: Pointer to video device created by V4L2 subsystem |
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* @ctrl_handler: V4L2 controls handler |
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* @core: Pointer to underlying core device |
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* @ops: Vtable of functions. See struct si476x_radio_ops for details |
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* @debugfs: pointer to &strucd dentry for debugfs |
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* @audmode: audio mode, as defined for the rxsubchans field |
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* at videodev2.h |
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* |
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* core structure is the radio device is being used |
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*/ |
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struct si476x_radio { |
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struct v4l2_device v4l2dev; |
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struct video_device videodev; |
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struct v4l2_ctrl_handler ctrl_handler; |
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struct si476x_core *core; |
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/* This field should not be accesses unless core lock is held */ |
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const struct si476x_radio_ops *ops; |
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struct dentry *debugfs; |
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u32 audmode; |
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}; |
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static inline struct si476x_radio * |
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v4l2_ctrl_handler_to_radio(struct v4l2_ctrl_handler *d) |
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{ |
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return container_of(d, struct si476x_radio, ctrl_handler); |
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} |
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/* |
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* si476x_vidioc_querycap - query device capabilities |
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*/ |
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static int si476x_radio_querycap(struct file *file, void *priv, |
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struct v4l2_capability *capability) |
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{ |
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struct si476x_radio *radio = video_drvdata(file); |
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strscpy(capability->driver, radio->v4l2dev.name, |
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sizeof(capability->driver)); |
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strscpy(capability->card, DRIVER_CARD, sizeof(capability->card)); |
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snprintf(capability->bus_info, sizeof(capability->bus_info), |
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"platform:%s", radio->v4l2dev.name); |
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return 0; |
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} |
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static int si476x_radio_enum_freq_bands(struct file *file, void *priv, |
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struct v4l2_frequency_band *band) |
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{ |
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int err; |
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struct si476x_radio *radio = video_drvdata(file); |
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if (band->tuner != 0) |
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return -EINVAL; |
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switch (radio->core->chip_id) { |
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/* AM/FM tuners -- all bands are supported */ |
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case SI476X_CHIP_SI4761: |
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case SI476X_CHIP_SI4764: |
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if (band->index < ARRAY_SIZE(si476x_bands)) { |
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*band = si476x_bands[band->index]; |
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err = 0; |
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} else { |
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err = -EINVAL; |
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} |
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break; |
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/* FM companion tuner chips -- only FM bands are |
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* supported */ |
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case SI476X_CHIP_SI4768: |
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if (band->index == SI476X_BAND_FM) { |
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*band = si476x_bands[band->index]; |
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err = 0; |
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} else { |
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err = -EINVAL; |
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} |
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break; |
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default: |
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err = -EINVAL; |
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} |
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return err; |
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} |
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static int si476x_radio_g_tuner(struct file *file, void *priv, |
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struct v4l2_tuner *tuner) |
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{ |
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int err; |
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struct si476x_rsq_status_report report; |
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struct si476x_radio *radio = video_drvdata(file); |
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struct si476x_rsq_status_args args = { |
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.primary = false, |
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.rsqack = false, |
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.attune = false, |
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.cancel = false, |
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.stcack = false, |
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}; |
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if (tuner->index != 0) |
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return -EINVAL; |
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tuner->type = V4L2_TUNER_RADIO; |
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tuner->capability = V4L2_TUNER_CAP_LOW /* Measure frequencies |
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* in multiples of |
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* 62.5 Hz */ |
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| V4L2_TUNER_CAP_STEREO |
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| V4L2_TUNER_CAP_HWSEEK_BOUNDED |
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| V4L2_TUNER_CAP_HWSEEK_WRAP |
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| V4L2_TUNER_CAP_HWSEEK_PROG_LIM; |
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si476x_core_lock(radio->core); |
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if (si476x_core_is_a_secondary_tuner(radio->core)) { |
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strscpy(tuner->name, "FM (secondary)", sizeof(tuner->name)); |
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tuner->rxsubchans = 0; |
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tuner->rangelow = si476x_bands[SI476X_BAND_FM].rangelow; |
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} else if (si476x_core_has_am(radio->core)) { |
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if (si476x_core_is_a_primary_tuner(radio->core)) |
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strscpy(tuner->name, "AM/FM (primary)", |
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sizeof(tuner->name)); |
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else |
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strscpy(tuner->name, "AM/FM", sizeof(tuner->name)); |
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|
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tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO |
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| V4L2_TUNER_SUB_RDS; |
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tuner->capability |= V4L2_TUNER_CAP_RDS |
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| V4L2_TUNER_CAP_RDS_BLOCK_IO |
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| V4L2_TUNER_CAP_FREQ_BANDS; |
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|
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tuner->rangelow = si476x_bands[SI476X_BAND_AM].rangelow; |
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} else { |
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strscpy(tuner->name, "FM", sizeof(tuner->name)); |
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tuner->rxsubchans = V4L2_TUNER_SUB_RDS; |
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tuner->capability |= V4L2_TUNER_CAP_RDS |
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| V4L2_TUNER_CAP_RDS_BLOCK_IO |
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| V4L2_TUNER_CAP_FREQ_BANDS; |
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tuner->rangelow = si476x_bands[SI476X_BAND_FM].rangelow; |
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} |
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|
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tuner->audmode = radio->audmode; |
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|
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tuner->afc = 1; |
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tuner->rangehigh = si476x_bands[SI476X_BAND_FM].rangehigh; |
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|
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err = radio->ops->rsq_status(radio->core, |
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&args, &report); |
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if (err < 0) { |
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tuner->signal = 0; |
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} else { |
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/* |
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* tuner->signal value range: 0x0000 .. 0xFFFF, |
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* report.rssi: -128 .. 127 |
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*/ |
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tuner->signal = (report.rssi + 128) * 257; |
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} |
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si476x_core_unlock(radio->core); |
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|
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return err; |
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} |
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|
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static int si476x_radio_s_tuner(struct file *file, void *priv, |
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const struct v4l2_tuner *tuner) |
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{ |
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struct si476x_radio *radio = video_drvdata(file); |
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|
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if (tuner->index != 0) |
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return -EINVAL; |
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|
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if (tuner->audmode == V4L2_TUNER_MODE_MONO || |
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tuner->audmode == V4L2_TUNER_MODE_STEREO) |
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radio->audmode = tuner->audmode; |
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else |
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radio->audmode = V4L2_TUNER_MODE_STEREO; |
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|
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return 0; |
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} |
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|
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static int si476x_radio_init_vtable(struct si476x_radio *radio, |
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enum si476x_func func) |
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{ |
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static const struct si476x_radio_ops fm_ops = { |
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.tune_freq = si476x_core_cmd_fm_tune_freq, |
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.seek_start = si476x_core_cmd_fm_seek_start, |
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.rsq_status = si476x_core_cmd_fm_rsq_status, |
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.rds_blckcnt = si476x_core_cmd_fm_rds_blockcount, |
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.phase_diversity = si476x_core_cmd_fm_phase_diversity, |
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.phase_div_status = si476x_core_cmd_fm_phase_div_status, |
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.acf_status = si476x_core_cmd_fm_acf_status, |
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.agc_status = si476x_core_cmd_agc_status, |
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}; |
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|
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static const struct si476x_radio_ops am_ops = { |
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.tune_freq = si476x_core_cmd_am_tune_freq, |
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.seek_start = si476x_core_cmd_am_seek_start, |
|
.rsq_status = si476x_core_cmd_am_rsq_status, |
|
.rds_blckcnt = NULL, |
|
.phase_diversity = NULL, |
|
.phase_div_status = NULL, |
|
.acf_status = si476x_core_cmd_am_acf_status, |
|
.agc_status = NULL, |
|
}; |
|
|
|
switch (func) { |
|
case SI476X_FUNC_FM_RECEIVER: |
|
radio->ops = &fm_ops; |
|
return 0; |
|
|
|
case SI476X_FUNC_AM_RECEIVER: |
|
radio->ops = &am_ops; |
|
return 0; |
|
default: |
|
WARN(1, "Unexpected tuner function value\n"); |
|
return -EINVAL; |
|
} |
|
} |
|
|
|
static int si476x_radio_pretune(struct si476x_radio *radio, |
|
enum si476x_func func) |
|
{ |
|
int retval; |
|
|
|
struct si476x_tune_freq_args args = { |
|
.zifsr = false, |
|
.hd = false, |
|
.injside = SI476X_INJSIDE_AUTO, |
|
.tunemode = SI476X_TM_VALIDATED_NORMAL_TUNE, |
|
.smoothmetrics = SI476X_SM_INITIALIZE_AUDIO, |
|
.antcap = 0, |
|
}; |
|
|
|
switch (func) { |
|
case SI476X_FUNC_FM_RECEIVER: |
|
args.freq = v4l2_to_si476x(radio->core, |
|
92 * FREQ_MUL); |
|
retval = radio->ops->tune_freq(radio->core, &args); |
|
break; |
|
case SI476X_FUNC_AM_RECEIVER: |
|
args.freq = v4l2_to_si476x(radio->core, |
|
0.6 * FREQ_MUL); |
|
retval = radio->ops->tune_freq(radio->core, &args); |
|
break; |
|
default: |
|
WARN(1, "Unexpected tuner function value\n"); |
|
retval = -EINVAL; |
|
} |
|
|
|
return retval; |
|
} |
|
static int si476x_radio_do_post_powerup_init(struct si476x_radio *radio, |
|
enum si476x_func func) |
|
{ |
|
int err; |
|
|
|
/* regcache_mark_dirty(radio->core->regmap); */ |
|
err = regcache_sync_region(radio->core->regmap, |
|
SI476X_PROP_DIGITAL_IO_INPUT_SAMPLE_RATE, |
|
SI476X_PROP_DIGITAL_IO_OUTPUT_FORMAT); |
|
if (err < 0) |
|
return err; |
|
|
|
err = regcache_sync_region(radio->core->regmap, |
|
SI476X_PROP_AUDIO_DEEMPHASIS, |
|
SI476X_PROP_AUDIO_PWR_LINE_FILTER); |
|
if (err < 0) |
|
return err; |
|
|
|
err = regcache_sync_region(radio->core->regmap, |
|
SI476X_PROP_INT_CTL_ENABLE, |
|
SI476X_PROP_INT_CTL_ENABLE); |
|
if (err < 0) |
|
return err; |
|
|
|
/* |
|
* Is there any point in restoring SNR and the like |
|
* when switching between AM/FM? |
|
*/ |
|
err = regcache_sync_region(radio->core->regmap, |
|
SI476X_PROP_VALID_MAX_TUNE_ERROR, |
|
SI476X_PROP_VALID_MAX_TUNE_ERROR); |
|
if (err < 0) |
|
return err; |
|
|
|
err = regcache_sync_region(radio->core->regmap, |
|
SI476X_PROP_VALID_SNR_THRESHOLD, |
|
SI476X_PROP_VALID_RSSI_THRESHOLD); |
|
if (err < 0) |
|
return err; |
|
|
|
if (func == SI476X_FUNC_FM_RECEIVER) { |
|
if (si476x_core_has_diversity(radio->core)) { |
|
err = si476x_core_cmd_fm_phase_diversity(radio->core, |
|
radio->core->diversity_mode); |
|
if (err < 0) |
|
return err; |
|
} |
|
|
|
err = regcache_sync_region(radio->core->regmap, |
|
SI476X_PROP_FM_RDS_INTERRUPT_SOURCE, |
|
SI476X_PROP_FM_RDS_CONFIG); |
|
if (err < 0) |
|
return err; |
|
} |
|
|
|
return si476x_radio_init_vtable(radio, func); |
|
|
|
} |
|
|
|
static int si476x_radio_change_func(struct si476x_radio *radio, |
|
enum si476x_func func) |
|
{ |
|
int err; |
|
bool soft; |
|
/* |
|
* Since power/up down is a very time consuming operation, |
|
* try to avoid doing it if the requested mode matches the one |
|
* the tuner is in |
|
*/ |
|
if (func == radio->core->power_up_parameters.func) |
|
return 0; |
|
|
|
soft = true; |
|
err = si476x_core_stop(radio->core, soft); |
|
if (err < 0) { |
|
/* |
|
* OK, if the chip does not want to play nice let's |
|
* try to reset it in more brutal way |
|
*/ |
|
soft = false; |
|
err = si476x_core_stop(radio->core, soft); |
|
if (err < 0) |
|
return err; |
|
} |
|
/* |
|
Set the desired radio tuner function |
|
*/ |
|
radio->core->power_up_parameters.func = func; |
|
|
|
err = si476x_core_start(radio->core, soft); |
|
if (err < 0) |
|
return err; |
|
|
|
/* |
|
* No need to do the rest of manipulations for the bootlader |
|
* mode |
|
*/ |
|
if (func != SI476X_FUNC_FM_RECEIVER && |
|
func != SI476X_FUNC_AM_RECEIVER) |
|
return err; |
|
|
|
return si476x_radio_do_post_powerup_init(radio, func); |
|
} |
|
|
|
static int si476x_radio_g_frequency(struct file *file, void *priv, |
|
struct v4l2_frequency *f) |
|
{ |
|
int err; |
|
struct si476x_radio *radio = video_drvdata(file); |
|
|
|
if (f->tuner != 0 || |
|
f->type != V4L2_TUNER_RADIO) |
|
return -EINVAL; |
|
|
|
si476x_core_lock(radio->core); |
|
|
|
if (radio->ops->rsq_status) { |
|
struct si476x_rsq_status_report report; |
|
struct si476x_rsq_status_args args = { |
|
.primary = false, |
|
.rsqack = false, |
|
.attune = true, |
|
.cancel = false, |
|
.stcack = false, |
|
}; |
|
|
|
err = radio->ops->rsq_status(radio->core, &args, &report); |
|
if (!err) |
|
f->frequency = si476x_to_v4l2(radio->core, |
|
report.readfreq); |
|
} else { |
|
err = -EINVAL; |
|
} |
|
|
|
si476x_core_unlock(radio->core); |
|
|
|
return err; |
|
} |
|
|
|
static int si476x_radio_s_frequency(struct file *file, void *priv, |
|
const struct v4l2_frequency *f) |
|
{ |
|
int err; |
|
u32 freq = f->frequency; |
|
struct si476x_tune_freq_args args; |
|
struct si476x_radio *radio = video_drvdata(file); |
|
|
|
const u32 midrange = (si476x_bands[SI476X_BAND_AM].rangehigh + |
|
si476x_bands[SI476X_BAND_FM].rangelow) / 2; |
|
const int band = (freq > midrange) ? |
|
SI476X_BAND_FM : SI476X_BAND_AM; |
|
const enum si476x_func func = (band == SI476X_BAND_AM) ? |
|
SI476X_FUNC_AM_RECEIVER : SI476X_FUNC_FM_RECEIVER; |
|
|
|
if (f->tuner != 0 || |
|
f->type != V4L2_TUNER_RADIO) |
|
return -EINVAL; |
|
|
|
si476x_core_lock(radio->core); |
|
|
|
freq = clamp(freq, |
|
si476x_bands[band].rangelow, |
|
si476x_bands[band].rangehigh); |
|
|
|
if (si476x_radio_freq_is_inside_of_the_band(freq, |
|
SI476X_BAND_AM) && |
|
(!si476x_core_has_am(radio->core) || |
|
si476x_core_is_a_secondary_tuner(radio->core))) { |
|
err = -EINVAL; |
|
goto unlock; |
|
} |
|
|
|
err = si476x_radio_change_func(radio, func); |
|
if (err < 0) |
|
goto unlock; |
|
|
|
args.zifsr = false; |
|
args.hd = false; |
|
args.injside = SI476X_INJSIDE_AUTO; |
|
args.freq = v4l2_to_si476x(radio->core, freq); |
|
args.tunemode = SI476X_TM_VALIDATED_NORMAL_TUNE; |
|
args.smoothmetrics = SI476X_SM_INITIALIZE_AUDIO; |
|
args.antcap = 0; |
|
|
|
err = radio->ops->tune_freq(radio->core, &args); |
|
|
|
unlock: |
|
si476x_core_unlock(radio->core); |
|
return err; |
|
} |
|
|
|
static int si476x_radio_s_hw_freq_seek(struct file *file, void *priv, |
|
const struct v4l2_hw_freq_seek *seek) |
|
{ |
|
int err; |
|
enum si476x_func func; |
|
u32 rangelow = seek->rangelow, rangehigh = seek->rangehigh; |
|
struct si476x_radio *radio = video_drvdata(file); |
|
|
|
if (file->f_flags & O_NONBLOCK) |
|
return -EAGAIN; |
|
|
|
if (seek->tuner != 0 || |
|
seek->type != V4L2_TUNER_RADIO) |
|
return -EINVAL; |
|
|
|
si476x_core_lock(radio->core); |
|
|
|
if (!rangelow) { |
|
err = regmap_read(radio->core->regmap, |
|
SI476X_PROP_SEEK_BAND_BOTTOM, |
|
&rangelow); |
|
if (err) |
|
goto unlock; |
|
rangelow = si476x_to_v4l2(radio->core, rangelow); |
|
} |
|
if (!rangehigh) { |
|
err = regmap_read(radio->core->regmap, |
|
SI476X_PROP_SEEK_BAND_TOP, |
|
&rangehigh); |
|
if (err) |
|
goto unlock; |
|
rangehigh = si476x_to_v4l2(radio->core, rangehigh); |
|
} |
|
|
|
if (rangelow > rangehigh) { |
|
err = -EINVAL; |
|
goto unlock; |
|
} |
|
|
|
if (si476x_radio_range_is_inside_of_the_band(rangelow, rangehigh, |
|
SI476X_BAND_FM)) { |
|
func = SI476X_FUNC_FM_RECEIVER; |
|
|
|
} else if (si476x_core_has_am(radio->core) && |
|
si476x_radio_range_is_inside_of_the_band(rangelow, rangehigh, |
|
SI476X_BAND_AM)) { |
|
func = SI476X_FUNC_AM_RECEIVER; |
|
} else { |
|
err = -EINVAL; |
|
goto unlock; |
|
} |
|
|
|
err = si476x_radio_change_func(radio, func); |
|
if (err < 0) |
|
goto unlock; |
|
|
|
if (seek->rangehigh) { |
|
err = regmap_write(radio->core->regmap, |
|
SI476X_PROP_SEEK_BAND_TOP, |
|
v4l2_to_si476x(radio->core, |
|
seek->rangehigh)); |
|
if (err) |
|
goto unlock; |
|
} |
|
if (seek->rangelow) { |
|
err = regmap_write(radio->core->regmap, |
|
SI476X_PROP_SEEK_BAND_BOTTOM, |
|
v4l2_to_si476x(radio->core, |
|
seek->rangelow)); |
|
if (err) |
|
goto unlock; |
|
} |
|
if (seek->spacing) { |
|
err = regmap_write(radio->core->regmap, |
|
SI476X_PROP_SEEK_FREQUENCY_SPACING, |
|
v4l2_to_si476x(radio->core, |
|
seek->spacing)); |
|
if (err) |
|
goto unlock; |
|
} |
|
|
|
err = radio->ops->seek_start(radio->core, |
|
seek->seek_upward, |
|
seek->wrap_around); |
|
unlock: |
|
si476x_core_unlock(radio->core); |
|
|
|
|
|
|
|
return err; |
|
} |
|
|
|
static int si476x_radio_g_volatile_ctrl(struct v4l2_ctrl *ctrl) |
|
{ |
|
int retval; |
|
struct si476x_radio *radio = v4l2_ctrl_handler_to_radio(ctrl->handler); |
|
|
|
si476x_core_lock(radio->core); |
|
|
|
switch (ctrl->id) { |
|
case V4L2_CID_SI476X_INTERCHIP_LINK: |
|
if (si476x_core_has_diversity(radio->core)) { |
|
if (radio->ops->phase_diversity) { |
|
retval = radio->ops->phase_div_status(radio->core); |
|
if (retval < 0) |
|
break; |
|
|
|
ctrl->val = !!SI476X_PHDIV_STATUS_LINK_LOCKED(retval); |
|
retval = 0; |
|
break; |
|
} else { |
|
retval = -ENOTTY; |
|
break; |
|
} |
|
} |
|
retval = -EINVAL; |
|
break; |
|
default: |
|
retval = -EINVAL; |
|
break; |
|
} |
|
si476x_core_unlock(radio->core); |
|
return retval; |
|
|
|
} |
|
|
|
static int si476x_radio_s_ctrl(struct v4l2_ctrl *ctrl) |
|
{ |
|
int retval; |
|
enum si476x_phase_diversity_mode mode; |
|
struct si476x_radio *radio = v4l2_ctrl_handler_to_radio(ctrl->handler); |
|
|
|
si476x_core_lock(radio->core); |
|
|
|
switch (ctrl->id) { |
|
case V4L2_CID_SI476X_HARMONICS_COUNT: |
|
retval = regmap_update_bits(radio->core->regmap, |
|
SI476X_PROP_AUDIO_PWR_LINE_FILTER, |
|
SI476X_PROP_PWR_HARMONICS_MASK, |
|
ctrl->val); |
|
break; |
|
case V4L2_CID_POWER_LINE_FREQUENCY: |
|
switch (ctrl->val) { |
|
case V4L2_CID_POWER_LINE_FREQUENCY_DISABLED: |
|
retval = regmap_update_bits(radio->core->regmap, |
|
SI476X_PROP_AUDIO_PWR_LINE_FILTER, |
|
SI476X_PROP_PWR_ENABLE_MASK, |
|
0); |
|
break; |
|
case V4L2_CID_POWER_LINE_FREQUENCY_50HZ: |
|
retval = regmap_update_bits(radio->core->regmap, |
|
SI476X_PROP_AUDIO_PWR_LINE_FILTER, |
|
SI476X_PROP_PWR_GRID_MASK, |
|
SI476X_PROP_PWR_GRID_50HZ); |
|
break; |
|
case V4L2_CID_POWER_LINE_FREQUENCY_60HZ: |
|
retval = regmap_update_bits(radio->core->regmap, |
|
SI476X_PROP_AUDIO_PWR_LINE_FILTER, |
|
SI476X_PROP_PWR_GRID_MASK, |
|
SI476X_PROP_PWR_GRID_60HZ); |
|
break; |
|
default: |
|
retval = -EINVAL; |
|
break; |
|
} |
|
break; |
|
case V4L2_CID_SI476X_RSSI_THRESHOLD: |
|
retval = regmap_write(radio->core->regmap, |
|
SI476X_PROP_VALID_RSSI_THRESHOLD, |
|
ctrl->val); |
|
break; |
|
case V4L2_CID_SI476X_SNR_THRESHOLD: |
|
retval = regmap_write(radio->core->regmap, |
|
SI476X_PROP_VALID_SNR_THRESHOLD, |
|
ctrl->val); |
|
break; |
|
case V4L2_CID_SI476X_MAX_TUNE_ERROR: |
|
retval = regmap_write(radio->core->regmap, |
|
SI476X_PROP_VALID_MAX_TUNE_ERROR, |
|
ctrl->val); |
|
break; |
|
case V4L2_CID_RDS_RECEPTION: |
|
/* |
|
* It looks like RDS related properties are |
|
* inaccessible when tuner is in AM mode, so cache the |
|
* changes |
|
*/ |
|
if (si476x_core_is_in_am_receiver_mode(radio->core)) |
|
regcache_cache_only(radio->core->regmap, true); |
|
|
|
if (ctrl->val) { |
|
retval = regmap_write(radio->core->regmap, |
|
SI476X_PROP_FM_RDS_INTERRUPT_FIFO_COUNT, |
|
radio->core->rds_fifo_depth); |
|
if (retval < 0) |
|
break; |
|
|
|
if (radio->core->client->irq) { |
|
retval = regmap_write(radio->core->regmap, |
|
SI476X_PROP_FM_RDS_INTERRUPT_SOURCE, |
|
SI476X_RDSRECV); |
|
if (retval < 0) |
|
break; |
|
} |
|
|
|
/* Drain RDS FIFO before enabling RDS processing */ |
|
retval = si476x_core_cmd_fm_rds_status(radio->core, |
|
false, |
|
true, |
|
true, |
|
NULL); |
|
if (retval < 0) |
|
break; |
|
|
|
retval = regmap_update_bits(radio->core->regmap, |
|
SI476X_PROP_FM_RDS_CONFIG, |
|
SI476X_PROP_RDSEN_MASK, |
|
SI476X_PROP_RDSEN); |
|
} else { |
|
retval = regmap_update_bits(radio->core->regmap, |
|
SI476X_PROP_FM_RDS_CONFIG, |
|
SI476X_PROP_RDSEN_MASK, |
|
!SI476X_PROP_RDSEN); |
|
} |
|
|
|
if (si476x_core_is_in_am_receiver_mode(radio->core)) |
|
regcache_cache_only(radio->core->regmap, false); |
|
break; |
|
case V4L2_CID_TUNE_DEEMPHASIS: |
|
retval = regmap_write(radio->core->regmap, |
|
SI476X_PROP_AUDIO_DEEMPHASIS, |
|
ctrl->val); |
|
break; |
|
|
|
case V4L2_CID_SI476X_DIVERSITY_MODE: |
|
mode = si476x_phase_diversity_idx_to_mode(ctrl->val); |
|
|
|
if (mode == radio->core->diversity_mode) { |
|
retval = 0; |
|
break; |
|
} |
|
|
|
if (si476x_core_is_in_am_receiver_mode(radio->core)) { |
|
/* |
|
* Diversity cannot be configured while tuner |
|
* is in AM mode so save the changes and carry on. |
|
*/ |
|
radio->core->diversity_mode = mode; |
|
retval = 0; |
|
} else { |
|
retval = radio->ops->phase_diversity(radio->core, mode); |
|
if (!retval) |
|
radio->core->diversity_mode = mode; |
|
} |
|
break; |
|
|
|
default: |
|
retval = -EINVAL; |
|
break; |
|
} |
|
|
|
si476x_core_unlock(radio->core); |
|
|
|
return retval; |
|
} |
|
|
|
#ifdef CONFIG_VIDEO_ADV_DEBUG |
|
static int si476x_radio_g_register(struct file *file, void *fh, |
|
struct v4l2_dbg_register *reg) |
|
{ |
|
int err; |
|
unsigned int value; |
|
struct si476x_radio *radio = video_drvdata(file); |
|
|
|
si476x_core_lock(radio->core); |
|
reg->size = 2; |
|
err = regmap_read(radio->core->regmap, |
|
(unsigned int)reg->reg, &value); |
|
reg->val = value; |
|
si476x_core_unlock(radio->core); |
|
|
|
return err; |
|
} |
|
static int si476x_radio_s_register(struct file *file, void *fh, |
|
const struct v4l2_dbg_register *reg) |
|
{ |
|
|
|
int err; |
|
struct si476x_radio *radio = video_drvdata(file); |
|
|
|
si476x_core_lock(radio->core); |
|
err = regmap_write(radio->core->regmap, |
|
(unsigned int)reg->reg, |
|
(unsigned int)reg->val); |
|
si476x_core_unlock(radio->core); |
|
|
|
return err; |
|
} |
|
#endif |
|
|
|
static int si476x_radio_fops_open(struct file *file) |
|
{ |
|
struct si476x_radio *radio = video_drvdata(file); |
|
int err; |
|
|
|
err = v4l2_fh_open(file); |
|
if (err) |
|
return err; |
|
|
|
if (v4l2_fh_is_singular_file(file)) { |
|
si476x_core_lock(radio->core); |
|
err = si476x_core_set_power_state(radio->core, |
|
SI476X_POWER_UP_FULL); |
|
if (err < 0) |
|
goto done; |
|
|
|
err = si476x_radio_do_post_powerup_init(radio, |
|
radio->core->power_up_parameters.func); |
|
if (err < 0) |
|
goto power_down; |
|
|
|
err = si476x_radio_pretune(radio, |
|
radio->core->power_up_parameters.func); |
|
if (err < 0) |
|
goto power_down; |
|
|
|
si476x_core_unlock(radio->core); |
|
/*Must be done after si476x_core_unlock to prevent a deadlock*/ |
|
v4l2_ctrl_handler_setup(&radio->ctrl_handler); |
|
} |
|
|
|
return err; |
|
|
|
power_down: |
|
si476x_core_set_power_state(radio->core, |
|
SI476X_POWER_DOWN); |
|
done: |
|
si476x_core_unlock(radio->core); |
|
v4l2_fh_release(file); |
|
|
|
return err; |
|
} |
|
|
|
static int si476x_radio_fops_release(struct file *file) |
|
{ |
|
int err; |
|
struct si476x_radio *radio = video_drvdata(file); |
|
|
|
if (v4l2_fh_is_singular_file(file) && |
|
atomic_read(&radio->core->is_alive)) |
|
si476x_core_set_power_state(radio->core, |
|
SI476X_POWER_DOWN); |
|
|
|
err = v4l2_fh_release(file); |
|
|
|
return err; |
|
} |
|
|
|
static ssize_t si476x_radio_fops_read(struct file *file, char __user *buf, |
|
size_t count, loff_t *ppos) |
|
{ |
|
ssize_t rval; |
|
size_t fifo_len; |
|
unsigned int copied; |
|
|
|
struct si476x_radio *radio = video_drvdata(file); |
|
|
|
/* block if no new data available */ |
|
if (kfifo_is_empty(&radio->core->rds_fifo)) { |
|
if (file->f_flags & O_NONBLOCK) |
|
return -EWOULDBLOCK; |
|
|
|
rval = wait_event_interruptible(radio->core->rds_read_queue, |
|
(!kfifo_is_empty(&radio->core->rds_fifo) || |
|
!atomic_read(&radio->core->is_alive))); |
|
if (rval < 0) |
|
return -EINTR; |
|
|
|
if (!atomic_read(&radio->core->is_alive)) |
|
return -ENODEV; |
|
} |
|
|
|
fifo_len = kfifo_len(&radio->core->rds_fifo); |
|
|
|
if (kfifo_to_user(&radio->core->rds_fifo, buf, |
|
min(fifo_len, count), |
|
&copied) != 0) { |
|
dev_warn(&radio->videodev.dev, |
|
"Error during FIFO to userspace copy\n"); |
|
rval = -EIO; |
|
} else { |
|
rval = (ssize_t)copied; |
|
} |
|
|
|
return rval; |
|
} |
|
|
|
static __poll_t si476x_radio_fops_poll(struct file *file, |
|
struct poll_table_struct *pts) |
|
{ |
|
struct si476x_radio *radio = video_drvdata(file); |
|
__poll_t req_events = poll_requested_events(pts); |
|
__poll_t err = v4l2_ctrl_poll(file, pts); |
|
|
|
if (req_events & (EPOLLIN | EPOLLRDNORM)) { |
|
if (atomic_read(&radio->core->is_alive)) |
|
poll_wait(file, &radio->core->rds_read_queue, pts); |
|
|
|
if (!atomic_read(&radio->core->is_alive)) |
|
err = EPOLLHUP; |
|
|
|
if (!kfifo_is_empty(&radio->core->rds_fifo)) |
|
err = EPOLLIN | EPOLLRDNORM; |
|
} |
|
|
|
return err; |
|
} |
|
|
|
static const struct v4l2_file_operations si476x_fops = { |
|
.owner = THIS_MODULE, |
|
.read = si476x_radio_fops_read, |
|
.poll = si476x_radio_fops_poll, |
|
.unlocked_ioctl = video_ioctl2, |
|
.open = si476x_radio_fops_open, |
|
.release = si476x_radio_fops_release, |
|
}; |
|
|
|
|
|
static const struct v4l2_ioctl_ops si4761_ioctl_ops = { |
|
.vidioc_querycap = si476x_radio_querycap, |
|
.vidioc_g_tuner = si476x_radio_g_tuner, |
|
.vidioc_s_tuner = si476x_radio_s_tuner, |
|
|
|
.vidioc_g_frequency = si476x_radio_g_frequency, |
|
.vidioc_s_frequency = si476x_radio_s_frequency, |
|
.vidioc_s_hw_freq_seek = si476x_radio_s_hw_freq_seek, |
|
.vidioc_enum_freq_bands = si476x_radio_enum_freq_bands, |
|
|
|
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event, |
|
.vidioc_unsubscribe_event = v4l2_event_unsubscribe, |
|
|
|
#ifdef CONFIG_VIDEO_ADV_DEBUG |
|
.vidioc_g_register = si476x_radio_g_register, |
|
.vidioc_s_register = si476x_radio_s_register, |
|
#endif |
|
}; |
|
|
|
|
|
static const struct video_device si476x_viddev_template = { |
|
.fops = &si476x_fops, |
|
.name = DRIVER_NAME, |
|
.release = video_device_release_empty, |
|
}; |
|
|
|
|
|
|
|
static ssize_t si476x_radio_read_acf_blob(struct file *file, |
|
char __user *user_buf, |
|
size_t count, loff_t *ppos) |
|
{ |
|
int err; |
|
struct si476x_radio *radio = file->private_data; |
|
struct si476x_acf_status_report report; |
|
|
|
si476x_core_lock(radio->core); |
|
if (radio->ops->acf_status) |
|
err = radio->ops->acf_status(radio->core, &report); |
|
else |
|
err = -ENOENT; |
|
si476x_core_unlock(radio->core); |
|
|
|
if (err < 0) |
|
return err; |
|
|
|
return simple_read_from_buffer(user_buf, count, ppos, &report, |
|
sizeof(report)); |
|
} |
|
|
|
static const struct file_operations radio_acf_fops = { |
|
.open = simple_open, |
|
.llseek = default_llseek, |
|
.read = si476x_radio_read_acf_blob, |
|
}; |
|
|
|
static ssize_t si476x_radio_read_rds_blckcnt_blob(struct file *file, |
|
char __user *user_buf, |
|
size_t count, loff_t *ppos) |
|
{ |
|
int err; |
|
struct si476x_radio *radio = file->private_data; |
|
struct si476x_rds_blockcount_report report; |
|
|
|
si476x_core_lock(radio->core); |
|
if (radio->ops->rds_blckcnt) |
|
err = radio->ops->rds_blckcnt(radio->core, true, |
|
&report); |
|
else |
|
err = -ENOENT; |
|
si476x_core_unlock(radio->core); |
|
|
|
if (err < 0) |
|
return err; |
|
|
|
return simple_read_from_buffer(user_buf, count, ppos, &report, |
|
sizeof(report)); |
|
} |
|
|
|
static const struct file_operations radio_rds_blckcnt_fops = { |
|
.open = simple_open, |
|
.llseek = default_llseek, |
|
.read = si476x_radio_read_rds_blckcnt_blob, |
|
}; |
|
|
|
static ssize_t si476x_radio_read_agc_blob(struct file *file, |
|
char __user *user_buf, |
|
size_t count, loff_t *ppos) |
|
{ |
|
int err; |
|
struct si476x_radio *radio = file->private_data; |
|
struct si476x_agc_status_report report; |
|
|
|
si476x_core_lock(radio->core); |
|
if (radio->ops->rds_blckcnt) |
|
err = radio->ops->agc_status(radio->core, &report); |
|
else |
|
err = -ENOENT; |
|
si476x_core_unlock(radio->core); |
|
|
|
if (err < 0) |
|
return err; |
|
|
|
return simple_read_from_buffer(user_buf, count, ppos, &report, |
|
sizeof(report)); |
|
} |
|
|
|
static const struct file_operations radio_agc_fops = { |
|
.open = simple_open, |
|
.llseek = default_llseek, |
|
.read = si476x_radio_read_agc_blob, |
|
}; |
|
|
|
static ssize_t si476x_radio_read_rsq_blob(struct file *file, |
|
char __user *user_buf, |
|
size_t count, loff_t *ppos) |
|
{ |
|
int err; |
|
struct si476x_radio *radio = file->private_data; |
|
struct si476x_rsq_status_report report; |
|
struct si476x_rsq_status_args args = { |
|
.primary = false, |
|
.rsqack = false, |
|
.attune = false, |
|
.cancel = false, |
|
.stcack = false, |
|
}; |
|
|
|
si476x_core_lock(radio->core); |
|
if (radio->ops->rds_blckcnt) |
|
err = radio->ops->rsq_status(radio->core, &args, &report); |
|
else |
|
err = -ENOENT; |
|
si476x_core_unlock(radio->core); |
|
|
|
if (err < 0) |
|
return err; |
|
|
|
return simple_read_from_buffer(user_buf, count, ppos, &report, |
|
sizeof(report)); |
|
} |
|
|
|
static const struct file_operations radio_rsq_fops = { |
|
.open = simple_open, |
|
.llseek = default_llseek, |
|
.read = si476x_radio_read_rsq_blob, |
|
}; |
|
|
|
static ssize_t si476x_radio_read_rsq_primary_blob(struct file *file, |
|
char __user *user_buf, |
|
size_t count, loff_t *ppos) |
|
{ |
|
int err; |
|
struct si476x_radio *radio = file->private_data; |
|
struct si476x_rsq_status_report report; |
|
struct si476x_rsq_status_args args = { |
|
.primary = true, |
|
.rsqack = false, |
|
.attune = false, |
|
.cancel = false, |
|
.stcack = false, |
|
}; |
|
|
|
si476x_core_lock(radio->core); |
|
if (radio->ops->rds_blckcnt) |
|
err = radio->ops->rsq_status(radio->core, &args, &report); |
|
else |
|
err = -ENOENT; |
|
si476x_core_unlock(radio->core); |
|
|
|
if (err < 0) |
|
return err; |
|
|
|
return simple_read_from_buffer(user_buf, count, ppos, &report, |
|
sizeof(report)); |
|
} |
|
|
|
static const struct file_operations radio_rsq_primary_fops = { |
|
.open = simple_open, |
|
.llseek = default_llseek, |
|
.read = si476x_radio_read_rsq_primary_blob, |
|
}; |
|
|
|
|
|
static void si476x_radio_init_debugfs(struct si476x_radio *radio) |
|
{ |
|
radio->debugfs = debugfs_create_dir(dev_name(radio->v4l2dev.dev), NULL); |
|
|
|
debugfs_create_file("acf", S_IRUGO, radio->debugfs, radio, |
|
&radio_acf_fops); |
|
|
|
debugfs_create_file("rds_blckcnt", S_IRUGO, radio->debugfs, radio, |
|
&radio_rds_blckcnt_fops); |
|
|
|
debugfs_create_file("agc", S_IRUGO, radio->debugfs, radio, |
|
&radio_agc_fops); |
|
|
|
debugfs_create_file("rsq", S_IRUGO, radio->debugfs, radio, |
|
&radio_rsq_fops); |
|
|
|
debugfs_create_file("rsq_primary", S_IRUGO, radio->debugfs, radio, |
|
&radio_rsq_primary_fops); |
|
} |
|
|
|
|
|
static int si476x_radio_add_new_custom(struct si476x_radio *radio, |
|
enum si476x_ctrl_idx idx) |
|
{ |
|
int rval; |
|
struct v4l2_ctrl *ctrl; |
|
|
|
ctrl = v4l2_ctrl_new_custom(&radio->ctrl_handler, |
|
&si476x_ctrls[idx], |
|
NULL); |
|
rval = radio->ctrl_handler.error; |
|
if (ctrl == NULL && rval) |
|
dev_err(radio->v4l2dev.dev, |
|
"Could not initialize '%s' control %d\n", |
|
si476x_ctrls[idx].name, rval); |
|
|
|
return rval; |
|
} |
|
|
|
static int si476x_radio_probe(struct platform_device *pdev) |
|
{ |
|
int rval; |
|
struct si476x_radio *radio; |
|
struct v4l2_ctrl *ctrl; |
|
|
|
static atomic_t instance = ATOMIC_INIT(0); |
|
|
|
radio = devm_kzalloc(&pdev->dev, sizeof(*radio), GFP_KERNEL); |
|
if (!radio) |
|
return -ENOMEM; |
|
|
|
radio->core = i2c_mfd_cell_to_core(&pdev->dev); |
|
|
|
v4l2_device_set_name(&radio->v4l2dev, DRIVER_NAME, &instance); |
|
|
|
rval = v4l2_device_register(&pdev->dev, &radio->v4l2dev); |
|
if (rval) { |
|
dev_err(&pdev->dev, "Cannot register v4l2_device.\n"); |
|
return rval; |
|
} |
|
|
|
memcpy(&radio->videodev, &si476x_viddev_template, |
|
sizeof(struct video_device)); |
|
|
|
radio->videodev.v4l2_dev = &radio->v4l2dev; |
|
radio->videodev.ioctl_ops = &si4761_ioctl_ops; |
|
radio->videodev.device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO | |
|
V4L2_CAP_HW_FREQ_SEEK; |
|
|
|
si476x_core_lock(radio->core); |
|
if (!si476x_core_is_a_secondary_tuner(radio->core)) |
|
radio->videodev.device_caps |= V4L2_CAP_RDS_CAPTURE | |
|
V4L2_CAP_READWRITE; |
|
si476x_core_unlock(radio->core); |
|
|
|
video_set_drvdata(&radio->videodev, radio); |
|
platform_set_drvdata(pdev, radio); |
|
|
|
|
|
radio->v4l2dev.ctrl_handler = &radio->ctrl_handler; |
|
v4l2_ctrl_handler_init(&radio->ctrl_handler, |
|
1 + ARRAY_SIZE(si476x_ctrls)); |
|
|
|
if (si476x_core_has_am(radio->core)) { |
|
ctrl = v4l2_ctrl_new_std_menu(&radio->ctrl_handler, |
|
&si476x_ctrl_ops, |
|
V4L2_CID_POWER_LINE_FREQUENCY, |
|
V4L2_CID_POWER_LINE_FREQUENCY_60HZ, |
|
0, 0); |
|
rval = radio->ctrl_handler.error; |
|
if (ctrl == NULL && rval) { |
|
dev_err(&pdev->dev, "Could not initialize V4L2_CID_POWER_LINE_FREQUENCY control %d\n", |
|
rval); |
|
goto exit; |
|
} |
|
|
|
rval = si476x_radio_add_new_custom(radio, |
|
SI476X_IDX_HARMONICS_COUNT); |
|
if (rval < 0) |
|
goto exit; |
|
} |
|
|
|
rval = si476x_radio_add_new_custom(radio, SI476X_IDX_RSSI_THRESHOLD); |
|
if (rval < 0) |
|
goto exit; |
|
|
|
rval = si476x_radio_add_new_custom(radio, SI476X_IDX_SNR_THRESHOLD); |
|
if (rval < 0) |
|
goto exit; |
|
|
|
rval = si476x_radio_add_new_custom(radio, SI476X_IDX_MAX_TUNE_ERROR); |
|
if (rval < 0) |
|
goto exit; |
|
|
|
ctrl = v4l2_ctrl_new_std_menu(&radio->ctrl_handler, |
|
&si476x_ctrl_ops, |
|
V4L2_CID_TUNE_DEEMPHASIS, |
|
V4L2_DEEMPHASIS_75_uS, 0, 0); |
|
rval = radio->ctrl_handler.error; |
|
if (ctrl == NULL && rval) { |
|
dev_err(&pdev->dev, "Could not initialize V4L2_CID_TUNE_DEEMPHASIS control %d\n", |
|
rval); |
|
goto exit; |
|
} |
|
|
|
ctrl = v4l2_ctrl_new_std(&radio->ctrl_handler, &si476x_ctrl_ops, |
|
V4L2_CID_RDS_RECEPTION, |
|
0, 1, 1, 1); |
|
rval = radio->ctrl_handler.error; |
|
if (ctrl == NULL && rval) { |
|
dev_err(&pdev->dev, "Could not initialize V4L2_CID_RDS_RECEPTION control %d\n", |
|
rval); |
|
goto exit; |
|
} |
|
|
|
if (si476x_core_has_diversity(radio->core)) { |
|
si476x_ctrls[SI476X_IDX_DIVERSITY_MODE].def = |
|
si476x_phase_diversity_mode_to_idx(radio->core->diversity_mode); |
|
rval = si476x_radio_add_new_custom(radio, SI476X_IDX_DIVERSITY_MODE); |
|
if (rval < 0) |
|
goto exit; |
|
|
|
rval = si476x_radio_add_new_custom(radio, SI476X_IDX_INTERCHIP_LINK); |
|
if (rval < 0) |
|
goto exit; |
|
} |
|
|
|
/* register video device */ |
|
rval = video_register_device(&radio->videodev, VFL_TYPE_RADIO, -1); |
|
if (rval < 0) { |
|
dev_err(&pdev->dev, "Could not register video device\n"); |
|
goto exit; |
|
} |
|
|
|
si476x_radio_init_debugfs(radio); |
|
|
|
return 0; |
|
exit: |
|
v4l2_ctrl_handler_free(radio->videodev.ctrl_handler); |
|
return rval; |
|
} |
|
|
|
static int si476x_radio_remove(struct platform_device *pdev) |
|
{ |
|
struct si476x_radio *radio = platform_get_drvdata(pdev); |
|
|
|
v4l2_ctrl_handler_free(radio->videodev.ctrl_handler); |
|
video_unregister_device(&radio->videodev); |
|
v4l2_device_unregister(&radio->v4l2dev); |
|
debugfs_remove_recursive(radio->debugfs); |
|
|
|
return 0; |
|
} |
|
|
|
MODULE_ALIAS("platform:si476x-radio"); |
|
|
|
static struct platform_driver si476x_radio_driver = { |
|
.driver = { |
|
.name = DRIVER_NAME, |
|
}, |
|
.probe = si476x_radio_probe, |
|
.remove = si476x_radio_remove, |
|
}; |
|
module_platform_driver(si476x_radio_driver); |
|
|
|
MODULE_AUTHOR("Andrey Smirnov <[email protected]>"); |
|
MODULE_DESCRIPTION("Driver for Si4761/64/68 AM/FM Radio MFD Cell"); |
|
MODULE_LICENSE("GPL");
|
|
|