| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * drivers/media/radio/radio-si476x.c -- V4L2 driver for SI476X chips |
| * |
| * Copyright (C) 2012 Innovative Converged Devices(ICD) |
| * Copyright (C) 2013 Andrey Smirnov |
| * |
| * Author: Andrey Smirnov <andrew.smirnov@gmail.com> |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/delay.h> |
| #include <linux/interrupt.h> |
| #include <linux/slab.h> |
| #include <linux/atomic.h> |
| #include <linux/videodev2.h> |
| #include <linux/mutex.h> |
| #include <linux/debugfs.h> |
| #include <media/v4l2-common.h> |
| #include <media/v4l2-ioctl.h> |
| #include <media/v4l2-ctrls.h> |
| #include <media/v4l2-event.h> |
| #include <media/v4l2-device.h> |
| |
| #include <media/drv-intf/si476x.h> |
| #include <linux/mfd/si476x-core.h> |
| |
| #define FM_FREQ_RANGE_LOW 64000000 |
| #define FM_FREQ_RANGE_HIGH 108000000 |
| |
| #define AM_FREQ_RANGE_LOW 520000 |
| #define AM_FREQ_RANGE_HIGH 30000000 |
| |
| #define PWRLINEFLTR (1 << 8) |
| |
| #define FREQ_MUL (10000000 / 625) |
| |
| #define SI476X_PHDIV_STATUS_LINK_LOCKED(status) (0x80 & (status)) |
| |
| #define DRIVER_NAME "si476x-radio" |
| #define DRIVER_CARD "SI476x AM/FM Receiver" |
| |
| enum si476x_freq_bands { |
| SI476X_BAND_FM, |
| SI476X_BAND_AM, |
| }; |
| |
| static const struct v4l2_frequency_band si476x_bands[] = { |
| [SI476X_BAND_FM] = { |
| .type = V4L2_TUNER_RADIO, |
| .index = SI476X_BAND_FM, |
| .capability = V4L2_TUNER_CAP_LOW |
| | V4L2_TUNER_CAP_STEREO |
| | V4L2_TUNER_CAP_RDS |
| | V4L2_TUNER_CAP_RDS_BLOCK_IO |
| | V4L2_TUNER_CAP_FREQ_BANDS, |
| .rangelow = 64 * FREQ_MUL, |
| .rangehigh = 108 * FREQ_MUL, |
| .modulation = V4L2_BAND_MODULATION_FM, |
| }, |
| [SI476X_BAND_AM] = { |
| .type = V4L2_TUNER_RADIO, |
| .index = SI476X_BAND_AM, |
| .capability = V4L2_TUNER_CAP_LOW |
| | V4L2_TUNER_CAP_FREQ_BANDS, |
| .rangelow = 0.52 * FREQ_MUL, |
| .rangehigh = 30 * FREQ_MUL, |
| .modulation = V4L2_BAND_MODULATION_AM, |
| }, |
| }; |
| |
| static inline bool si476x_radio_freq_is_inside_of_the_band(u32 freq, int band) |
| { |
| return freq >= si476x_bands[band].rangelow && |
| freq <= si476x_bands[band].rangehigh; |
| } |
| |
| static inline bool si476x_radio_range_is_inside_of_the_band(u32 low, u32 high, |
| int band) |
| { |
| return low >= si476x_bands[band].rangelow && |
| high <= si476x_bands[band].rangehigh; |
| } |
| |
| static int si476x_radio_s_ctrl(struct v4l2_ctrl *ctrl); |
| static int si476x_radio_g_volatile_ctrl(struct v4l2_ctrl *ctrl); |
| |
| enum phase_diversity_modes_idx { |
| SI476X_IDX_PHDIV_DISABLED, |
| SI476X_IDX_PHDIV_PRIMARY_COMBINING, |
| SI476X_IDX_PHDIV_PRIMARY_ANTENNA, |
| SI476X_IDX_PHDIV_SECONDARY_ANTENNA, |
| SI476X_IDX_PHDIV_SECONDARY_COMBINING, |
| }; |
| |
| static const char * const phase_diversity_modes[] = { |
| [SI476X_IDX_PHDIV_DISABLED] = "Disabled", |
| [SI476X_IDX_PHDIV_PRIMARY_COMBINING] = "Primary with Secondary", |
| [SI476X_IDX_PHDIV_PRIMARY_ANTENNA] = "Primary Antenna", |
| [SI476X_IDX_PHDIV_SECONDARY_ANTENNA] = "Secondary Antenna", |
| [SI476X_IDX_PHDIV_SECONDARY_COMBINING] = "Secondary with Primary", |
| }; |
| |
| static inline enum phase_diversity_modes_idx |
| si476x_phase_diversity_mode_to_idx(enum si476x_phase_diversity_mode mode) |
| { |
| switch (mode) { |
| default: |
| fallthrough; |
| case SI476X_PHDIV_DISABLED: |
| return SI476X_IDX_PHDIV_DISABLED; |
| case SI476X_PHDIV_PRIMARY_COMBINING: |
| return SI476X_IDX_PHDIV_PRIMARY_COMBINING; |
| case SI476X_PHDIV_PRIMARY_ANTENNA: |
| return SI476X_IDX_PHDIV_PRIMARY_ANTENNA; |
| case SI476X_PHDIV_SECONDARY_ANTENNA: |
| return SI476X_IDX_PHDIV_SECONDARY_ANTENNA; |
| case SI476X_PHDIV_SECONDARY_COMBINING: |
| return SI476X_IDX_PHDIV_SECONDARY_COMBINING; |
| } |
| } |
| |
| static inline enum si476x_phase_diversity_mode |
| si476x_phase_diversity_idx_to_mode(enum phase_diversity_modes_idx idx) |
| { |
| static const int idx_to_value[] = { |
| [SI476X_IDX_PHDIV_DISABLED] = SI476X_PHDIV_DISABLED, |
| [SI476X_IDX_PHDIV_PRIMARY_COMBINING] = SI476X_PHDIV_PRIMARY_COMBINING, |
| [SI476X_IDX_PHDIV_PRIMARY_ANTENNA] = SI476X_PHDIV_PRIMARY_ANTENNA, |
| [SI476X_IDX_PHDIV_SECONDARY_ANTENNA] = SI476X_PHDIV_SECONDARY_ANTENNA, |
| [SI476X_IDX_PHDIV_SECONDARY_COMBINING] = SI476X_PHDIV_SECONDARY_COMBINING, |
| }; |
| |
| return idx_to_value[idx]; |
| } |
| |
| static const struct v4l2_ctrl_ops si476x_ctrl_ops = { |
| .g_volatile_ctrl = si476x_radio_g_volatile_ctrl, |
| .s_ctrl = si476x_radio_s_ctrl, |
| }; |
| |
| |
| enum si476x_ctrl_idx { |
| SI476X_IDX_RSSI_THRESHOLD, |
| SI476X_IDX_SNR_THRESHOLD, |
| SI476X_IDX_MAX_TUNE_ERROR, |
| SI476X_IDX_HARMONICS_COUNT, |
| SI476X_IDX_DIVERSITY_MODE, |
| SI476X_IDX_INTERCHIP_LINK, |
| }; |
| static struct v4l2_ctrl_config si476x_ctrls[] = { |
| |
| /* |
| * SI476X during its station seeking(or tuning) process uses several |
| * parameters to determine if "the station" is valid: |
| * |
| * - Signal's SNR(in dBuV) must be lower than |
| * #V4L2_CID_SI476X_SNR_THRESHOLD |
| * - Signal's RSSI(in dBuV) must be greater than |
| * #V4L2_CID_SI476X_RSSI_THRESHOLD |
| * - Signal's frequency deviation(in units of 2ppm) must not be |
| * more than #V4L2_CID_SI476X_MAX_TUNE_ERROR |
| */ |
| [SI476X_IDX_RSSI_THRESHOLD] = { |
| .ops = &si476x_ctrl_ops, |
| .id = V4L2_CID_SI476X_RSSI_THRESHOLD, |
| .name = "Valid RSSI Threshold", |
| .type = V4L2_CTRL_TYPE_INTEGER, |
| .min = -128, |
| .max = 127, |
| .step = 1, |
| }, |
| [SI476X_IDX_SNR_THRESHOLD] = { |
| .ops = &si476x_ctrl_ops, |
| .id = V4L2_CID_SI476X_SNR_THRESHOLD, |
| .type = V4L2_CTRL_TYPE_INTEGER, |
| .name = "Valid SNR Threshold", |
| .min = -128, |
| .max = 127, |
| .step = 1, |
| }, |
| [SI476X_IDX_MAX_TUNE_ERROR] = { |
| .ops = &si476x_ctrl_ops, |
| .id = V4L2_CID_SI476X_MAX_TUNE_ERROR, |
| .type = V4L2_CTRL_TYPE_INTEGER, |
| .name = "Max Tune Errors", |
| .min = 0, |
| .max = 126 * 2, |
| .step = 2, |
| }, |
| |
| /* |
| * #V4L2_CID_SI476X_HARMONICS_COUNT -- number of harmonics |
| * built-in power-line noise supression filter is to reject |
| * during AM-mode operation. |
| */ |
| [SI476X_IDX_HARMONICS_COUNT] = { |
| .ops = &si476x_ctrl_ops, |
| .id = V4L2_CID_SI476X_HARMONICS_COUNT, |
| .type = V4L2_CTRL_TYPE_INTEGER, |
| |
| .name = "Count of Harmonics to Reject", |
| .min = 0, |
| .max = 20, |
| .step = 1, |
| }, |
| |
| /* |
| * #V4L2_CID_SI476X_DIVERSITY_MODE -- configuration which |
| * two tuners working in diversity mode are to work in. |
| * |
| * - #SI476X_IDX_PHDIV_DISABLED diversity mode disabled |
| * - #SI476X_IDX_PHDIV_PRIMARY_COMBINING diversity mode is |
| * on, primary tuner's antenna is the main one. |
| * - #SI476X_IDX_PHDIV_PRIMARY_ANTENNA diversity mode is |
| * off, primary tuner's antenna is the main one. |
| * - #SI476X_IDX_PHDIV_SECONDARY_ANTENNA diversity mode is |
| * off, secondary tuner's antenna is the main one. |
| * - #SI476X_IDX_PHDIV_SECONDARY_COMBINING diversity mode is |
| * on, secondary tuner's antenna is the main one. |
| */ |
| [SI476X_IDX_DIVERSITY_MODE] = { |
| .ops = &si476x_ctrl_ops, |
| .id = V4L2_CID_SI476X_DIVERSITY_MODE, |
| .type = V4L2_CTRL_TYPE_MENU, |
| .name = "Phase Diversity Mode", |
| .qmenu = phase_diversity_modes, |
| .min = 0, |
| .max = ARRAY_SIZE(phase_diversity_modes) - 1, |
| }, |
| |
| /* |
| * #V4L2_CID_SI476X_INTERCHIP_LINK -- inter-chip link in |
| * diversity mode indicator. Allows user to determine if two |
| * chips working in diversity mode have established a link |
| * between each other and if the system as a whole uses |
| * signals from both antennas to receive FM radio. |
| */ |
| [SI476X_IDX_INTERCHIP_LINK] = { |
| .ops = &si476x_ctrl_ops, |
| .id = V4L2_CID_SI476X_INTERCHIP_LINK, |
| .type = V4L2_CTRL_TYPE_BOOLEAN, |
| .flags = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_VOLATILE, |
| .name = "Inter-Chip Link", |
| .min = 0, |
| .max = 1, |
| .step = 1, |
| }, |
| }; |
| |
| struct si476x_radio; |
| |
| /** |
| * struct si476x_radio_ops - vtable of tuner functions |
| * |
| * This table holds pointers to functions implementing particular |
| * operations depending on the mode in which the tuner chip was |
| * configured to start. If the function is not supported |
| * corresponding element is set to #NULL. |
| * |
| * @tune_freq: Tune chip to a specific frequency |
| * @seek_start: Star station seeking |
| * @rsq_status: Get Received Signal Quality(RSQ) status |
| * @rds_blckcnt: Get received RDS blocks count |
| * @phase_diversity: Change phase diversity mode of the tuner |
| * @phase_div_status: Get phase diversity mode status |
| * @acf_status: Get the status of Automatically Controlled |
| * Features(ACF) |
| * @agc_status: Get Automatic Gain Control(AGC) status |
| */ |
| struct si476x_radio_ops { |
| int (*tune_freq)(struct si476x_core *, struct si476x_tune_freq_args *); |
| int (*seek_start)(struct si476x_core *, bool, bool); |
| int (*rsq_status)(struct si476x_core *, struct si476x_rsq_status_args *, |
| struct si476x_rsq_status_report *); |
| int (*rds_blckcnt)(struct si476x_core *, bool, |
| struct si476x_rds_blockcount_report *); |
| |
| int (*phase_diversity)(struct si476x_core *, |
| enum si476x_phase_diversity_mode); |
| int (*phase_div_status)(struct si476x_core *); |
| int (*acf_status)(struct si476x_core *, |
| struct si476x_acf_status_report *); |
| int (*agc_status)(struct si476x_core *, |
| struct si476x_agc_status_report *); |
| }; |
| |
| /** |
| * struct si476x_radio - radio device |
| * |
| * @v4l2dev: Pointer to V4L2 device created by V4L2 subsystem |
| * @videodev: Pointer to video device created by V4L2 subsystem |
| * @ctrl_handler: V4L2 controls handler |
| * @core: Pointer to underlying core device |
| * @ops: Vtable of functions. See struct si476x_radio_ops for details |
| * @debugfs: pointer to &strucd dentry for debugfs |
| * @audmode: audio mode, as defined for the rxsubchans field |
| * at videodev2.h |
| * |
| * core structure is the radio device is being used |
| */ |
| struct si476x_radio { |
| struct v4l2_device v4l2dev; |
| struct video_device videodev; |
| struct v4l2_ctrl_handler ctrl_handler; |
| |
| struct si476x_core *core; |
| /* This field should not be accesses unless core lock is held */ |
| const struct si476x_radio_ops *ops; |
| |
| struct dentry *debugfs; |
| u32 audmode; |
| }; |
| |
| static inline struct si476x_radio * |
| v4l2_ctrl_handler_to_radio(struct v4l2_ctrl_handler *d) |
| { |
| return container_of(d, struct si476x_radio, ctrl_handler); |
| } |
| |
| /* |
| * si476x_vidioc_querycap - query device capabilities |
| */ |
| static int si476x_radio_querycap(struct file *file, void *priv, |
| struct v4l2_capability *capability) |
| { |
| struct si476x_radio *radio = video_drvdata(file); |
| |
| strscpy(capability->driver, radio->v4l2dev.name, |
| sizeof(capability->driver)); |
| strscpy(capability->card, DRIVER_CARD, sizeof(capability->card)); |
| snprintf(capability->bus_info, sizeof(capability->bus_info), |
| "platform:%s", radio->v4l2dev.name); |
| return 0; |
| } |
| |
| static int si476x_radio_enum_freq_bands(struct file *file, void *priv, |
| struct v4l2_frequency_band *band) |
| { |
| int err; |
| struct si476x_radio *radio = video_drvdata(file); |
| |
| if (band->tuner != 0) |
| return -EINVAL; |
| |
| switch (radio->core->chip_id) { |
| /* AM/FM tuners -- all bands are supported */ |
| case SI476X_CHIP_SI4761: |
| case SI476X_CHIP_SI4764: |
| if (band->index < ARRAY_SIZE(si476x_bands)) { |
| *band = si476x_bands[band->index]; |
| err = 0; |
| } else { |
| err = -EINVAL; |
| } |
| break; |
| /* FM companion tuner chips -- only FM bands are |
| * supported */ |
| case SI476X_CHIP_SI4768: |
| if (band->index == SI476X_BAND_FM) { |
| *band = si476x_bands[band->index]; |
| err = 0; |
| } else { |
| err = -EINVAL; |
| } |
| break; |
| default: |
| err = -EINVAL; |
| } |
| |
| return err; |
| } |
| |
| static int si476x_radio_g_tuner(struct file *file, void *priv, |
| struct v4l2_tuner *tuner) |
| { |
| int err; |
| struct si476x_rsq_status_report report; |
| struct si476x_radio *radio = video_drvdata(file); |
| |
| struct si476x_rsq_status_args args = { |
| .primary = false, |
| .rsqack = false, |
| .attune = false, |
| .cancel = false, |
| .stcack = false, |
| }; |
| |
| if (tuner->index != 0) |
| return -EINVAL; |
| |
| tuner->type = V4L2_TUNER_RADIO; |
| tuner->capability = V4L2_TUNER_CAP_LOW /* Measure frequencies |
| * in multiples of |
| * 62.5 Hz */ |
| | V4L2_TUNER_CAP_STEREO |
| | V4L2_TUNER_CAP_HWSEEK_BOUNDED |
| | V4L2_TUNER_CAP_HWSEEK_WRAP |
| | V4L2_TUNER_CAP_HWSEEK_PROG_LIM; |
| |
| si476x_core_lock(radio->core); |
| |
| if (si476x_core_is_a_secondary_tuner(radio->core)) { |
| strscpy(tuner->name, "FM (secondary)", sizeof(tuner->name)); |
| tuner->rxsubchans = 0; |
| tuner->rangelow = si476x_bands[SI476X_BAND_FM].rangelow; |
| } else if (si476x_core_has_am(radio->core)) { |
| if (si476x_core_is_a_primary_tuner(radio->core)) |
| strscpy(tuner->name, "AM/FM (primary)", |
| sizeof(tuner->name)); |
| else |
| strscpy(tuner->name, "AM/FM", sizeof(tuner->name)); |
| |
| tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO |
| | V4L2_TUNER_SUB_RDS; |
| tuner->capability |= V4L2_TUNER_CAP_RDS |
| | V4L2_TUNER_CAP_RDS_BLOCK_IO |
| | V4L2_TUNER_CAP_FREQ_BANDS; |
| |
| tuner->rangelow = si476x_bands[SI476X_BAND_AM].rangelow; |
| } else { |
| strscpy(tuner->name, "FM", sizeof(tuner->name)); |
| tuner->rxsubchans = V4L2_TUNER_SUB_RDS; |
| tuner->capability |= V4L2_TUNER_CAP_RDS |
| | V4L2_TUNER_CAP_RDS_BLOCK_IO |
| | V4L2_TUNER_CAP_FREQ_BANDS; |
| tuner->rangelow = si476x_bands[SI476X_BAND_FM].rangelow; |
| } |
| |
| tuner->audmode = radio->audmode; |
| |
| tuner->afc = 1; |
| tuner->rangehigh = si476x_bands[SI476X_BAND_FM].rangehigh; |
| |
| err = radio->ops->rsq_status(radio->core, |
| &args, &report); |
| if (err < 0) { |
| tuner->signal = 0; |
| } else { |
| /* |
| * tuner->signal value range: 0x0000 .. 0xFFFF, |
| * report.rssi: -128 .. 127 |
| */ |
| tuner->signal = (report.rssi + 128) * 257; |
| } |
| si476x_core_unlock(radio->core); |
| |
| return err; |
| } |
| |
| static int si476x_radio_s_tuner(struct file *file, void *priv, |
| const struct v4l2_tuner *tuner) |
| { |
| struct si476x_radio *radio = video_drvdata(file); |
| |
| if (tuner->index != 0) |
| return -EINVAL; |
| |
| if (tuner->audmode == V4L2_TUNER_MODE_MONO || |
| tuner->audmode == V4L2_TUNER_MODE_STEREO) |
| radio->audmode = tuner->audmode; |
| else |
| radio->audmode = V4L2_TUNER_MODE_STEREO; |
| |
| return 0; |
| } |
| |
| static int si476x_radio_init_vtable(struct si476x_radio *radio, |
| enum si476x_func func) |
| { |
| static const struct si476x_radio_ops fm_ops = { |
| .tune_freq = si476x_core_cmd_fm_tune_freq, |
| .seek_start = si476x_core_cmd_fm_seek_start, |
| .rsq_status = si476x_core_cmd_fm_rsq_status, |
| .rds_blckcnt = si476x_core_cmd_fm_rds_blockcount, |
| .phase_diversity = si476x_core_cmd_fm_phase_diversity, |
| .phase_div_status = si476x_core_cmd_fm_phase_div_status, |
| .acf_status = si476x_core_cmd_fm_acf_status, |
| .agc_status = si476x_core_cmd_agc_status, |
| }; |
| |
| static const struct si476x_radio_ops am_ops = { |
| .tune_freq = si476x_core_cmd_am_tune_freq, |
| .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) |
| { |
| 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); |
| |
| return v4l2_fh_release(file); |
| } |
| |
| 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 <andrew.smirnov@gmail.com>"); |
| MODULE_DESCRIPTION("Driver for Si4761/64/68 AM/FM Radio MFD Cell"); |
| MODULE_LICENSE("GPL"); |