| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Andrey Smirnov | 6195 | 99.04% | 1 | 5.88% |
| Mauro Carvalho Chehab | 25 | 0.40% | 4 | 23.53% |
| Hans Verkuil | 8 | 0.13% | 1 | 5.88% |
| Linus Torvalds | 5 | 0.08% | 1 | 5.88% |
| Greg Kroah-Hartman | 4 | 0.06% | 1 | 5.88% |
| Fugang Duan | 4 | 0.06% | 1 | 5.88% |
| Xiaofeng Cao | 3 | 0.05% | 1 | 5.88% |
| Al Viro | 3 | 0.05% | 2 | 11.76% |
| Uwe Kleine-König | 2 | 0.03% | 1 | 5.88% |
| Thomas Gleixner | 2 | 0.03% | 1 | 5.88% |
| Gustavo A. R. Silva | 2 | 0.03% | 1 | 5.88% |
| ye xingchen | 1 | 0.02% | 1 | 5.88% |
| Geert Uytterhoeven | 1 | 0.02% | 1 | 5.88% |
| Total | 6255 | 17 |
// 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 void 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); } MODULE_ALIAS("platform:si476x-radio"); static struct platform_driver si476x_radio_driver = { .driver = { .name = DRIVER_NAME, }, .probe = si476x_radio_probe, .remove_new = 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");
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