Message ID | 1351017872-32488-6-git-send-email-andrey.smirnov@convergeddevices.net (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
Hi Andrey, Some more comments... On Tue October 23 2012 20:44:31 Andrey Smirnov wrote: > This commit adds a driver that exposes all the radio related > functionality of the Si476x series of chips via the V4L2 subsystem. > > Signed-off-by: Andrey Smirnov <andrey.smirnov@convergeddevices.net> > --- > drivers/media/radio/Kconfig | 17 + > drivers/media/radio/Makefile | 1 + > drivers/media/radio/radio-si476x.c | 1549 ++++++++++++++++++++++++++++++++++++ > 3 files changed, 1567 insertions(+) > create mode 100644 drivers/media/radio/radio-si476x.c > <cut> > diff --git a/drivers/media/radio/radio-si476x.c b/drivers/media/radio/radio-si476x.c > new file mode 100644 > index 0000000..c8fa90f > --- /dev/null > +++ b/drivers/media/radio/radio-si476x.c > @@ -0,0 +1,1549 @@ > +#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 <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) (0b10000000 & (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; > +} > + > +#define PRIVATE_CTL_IDX(x) (x - V4L2_CID_PRIVATE_BASE) No. The new control IDs need to be added to include/uapi/linux/v4l2-controls.h with unique IDs. V4L2_CID_PRIVATE_BASE must not be used anymore for new controls. Since Halli Manjunatha hasn't worked on a new version of his patch with the new fm controls it might be something you want to take on (I'm referring to the FM RX control class). > + > +static int si476x_radio_s_ctrl(struct v4l2_ctrl *ctrl); > +static int si476x_radio_g_volatile_ctrl(struct v4l2_ctrl *ctrl); > + > +static const char * const deemphasis[] = { > + "75 us", > + "50 us", > +}; > + > +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 w/secondary", > + [SI476X_IDX_PHDIV_PRIMARY_ANTENNA] = "primary(primary antenna)", > + [SI476X_IDX_PHDIV_SECONDARY_ANTENNA] = "primary(seconadary antenna)", > + [SI476X_IDX_PHDIV_SECONDARY_COMBINING] = "secondary w/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_DEEMPHASIS, > + SI476X_IDX_RDS_RECEPTION, > + SI476X_IDX_DIVERSITY_MODE, > + SI476X_IDX_INTERCHIP_LINK, > +}; > + > +static struct v4l2_ctrl_config si476x_ctrls[] = { > + /* > + Tuning parameters > + 'max tune errors' is shared for both AM/FM mode of operation > + */ > + [SI476X_IDX_RSSI_THRESHOLD] = { > + .ops = &si476x_ctrl_ops, > + .id = SI476X_CID_RSSI_THRESHOLD, > + .name = "valid rssi threshold", The names of the controls should be capitilized, just like a title of a book. So this should become "Valid RSSI Threshold", etc. > + .type = V4L2_CTRL_TYPE_INTEGER, > + .min = -128, > + .max = 127, > + .step = 1, > + }, > + [SI476X_IDX_SNR_THRESHOLD] = { > + .ops = &si476x_ctrl_ops, > + .id = SI476X_CID_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 = SI476X_CID_MAX_TUNE_ERROR, > + .type = V4L2_CTRL_TYPE_INTEGER, > + .name = "max tune errors", > + .min = 0, > + .max = 126 * 2, > + .step = 2, > + }, > + /* > + Region specific parameters > + */ > + [SI476X_IDX_HARMONICS_COUNT] = { > + .ops = &si476x_ctrl_ops, > + .id = SI476X_CID_HARMONICS_COUNT, > + .type = V4L2_CTRL_TYPE_INTEGER, > + > + .name = "count of harmonics to reject", > + .min = 0, > + .max = 20, > + .step = 1, > + }, > + [SI476X_IDX_DEEMPHASIS] = { > + .ops = &si476x_ctrl_ops, > + .id = SI476X_CID_DEEMPHASIS, > + .type = V4L2_CTRL_TYPE_MENU, > + .name = "de-emphassis", > + .qmenu = deemphasis, > + .min = 0, > + .max = ARRAY_SIZE(deemphasis) - 1, > + .def = 0, > + }, > + [SI476X_IDX_RDS_RECEPTION] = { > + .ops = &si476x_ctrl_ops, > + .id = SI476X_CID_RDS_RECEPTION, > + .type = V4L2_CTRL_TYPE_BOOLEAN, > + .name = "rds", This name is too vague. Something like "RDS Reception" perhaps? > + .min = 0, > + .max = 1, > + .step = 1, > + }, > + [SI476X_IDX_DIVERSITY_MODE] = { > + .ops = &si476x_ctrl_ops, > + .id = SI476X_CID_DIVERSITY_MODE, > + .type = V4L2_CTRL_TYPE_MENU, > + .name = "phase diversity mode", > + .qmenu = phase_diversity_modes, > + .min = 0, > + .max = ARRAY_SIZE(phase_diversity_modes) - 1, > + }, > + [SI476X_IDX_INTERCHIP_LINK] = { > + .ops = &si476x_ctrl_ops, > + .id = SI476X_CID_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, Note that all these controls need to be documented as well. > + }, > +}; > + > +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 in. 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 Recieved Signal Quality(RSQ) status > + * @rds_blckcnt: Get recived 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 > + * > + * @core: Pointer to underlying core device > + * @videodev: Pointer to video device created by V4L2 subsystem > + * @ops: Vtable of functions. See struct si476x_radio_ops for details > + * @kref: Reference counter > + * @core_lock: An r/w semaphore to brebvent the deletion of underlying > + * 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_dev_to_radio(struct v4l2_device *d) > +{ > + return container_of(d, struct si476x_radio, v4l2dev); > +} > + > +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); > + > + strlcpy(capability->driver, radio->v4l2dev.name, > + sizeof(capability->driver)); > + strlcpy(capability->card, DRIVER_CARD, sizeof(capability->card)); > + snprintf(capability->bus_info, sizeof(capability->bus_info), > + "platform:%s", radio->v4l2dev.name); > + > + capability->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)) > + capability->device_caps |= V4L2_CAP_RDS_CAPTURE > + | V4L2_CAP_READWRITE; > + si476x_core_unlock(radio->core); > + > + capability->capabilities = capability->device_caps | V4L2_CAP_DEVICE_CAPS; > + 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)) { > + strlcpy(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)) > + strlcpy(tuner->name, "AM/FM (primary)", sizeof(tuner->name)); > + else > + strlcpy(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 { > + strlcpy(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, > + 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, > + struct v4l2_frequency *f) > +{ > + int err; > + 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 = (f->frequency > 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); > + > + f->frequency = clamp(f->frequency, > + si476x_bands[band].rangelow, > + si476x_bands[band].rangehigh); > + > + if (si476x_radio_freq_is_inside_of_the_band(f->frequency, 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, > + f->frequency); > + 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, 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(!seek->rangelow) { > + err = regmap_read(radio->core->regmap, > + SI476X_PROP_SEEK_BAND_BOTTOM, > + &rangelow); > + if (!err) > + rangelow = si476x_to_v4l2(radio->core, rangelow); > + else > + goto unlock; > + } > + if(!seek->rangehigh) { > + err = regmap_read(radio->core->regmap, > + SI476X_PROP_SEEK_BAND_TOP, > + &rangehigh); > + if (!err) > + rangehigh = si476x_to_v4l2(radio->core, rangehigh); > + else > + goto unlock; > + } > + > + 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 SI476X_CID_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; If ops->phase_diversity wasn't set, then this control shouldn't have been added in the first place. It should never return 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 SI476X_CID_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 SI476X_CID_RSSI_THRESHOLD: > + retval = regmap_write(radio->core->regmap, > + SI476X_PROP_VALID_RSSI_THRESHOLD, > + ctrl->val); > + break; > + case SI476X_CID_SNR_THRESHOLD: > + retval = regmap_write(radio->core->regmap, > + SI476X_PROP_VALID_SNR_THRESHOLD, > + ctrl->val); > + break; > + case SI476X_CID_MAX_TUNE_ERROR: > + retval = regmap_write(radio->core->regmap, > + SI476X_PROP_VALID_MAX_TUNE_ERROR, > + ctrl->val); > + break; > + case SI476X_CID_RDS_RECEPTION: > + /* > + * It looks like RDS related properties are > + * inaccesable 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 SI476X_CID_DEEMPHASIS: > + retval = regmap_write(radio->core->regmap, > + SI476X_PROP_AUDIO_DEEMPHASIS, > + ctrl->val); > + break; > + > + case SI476X_CID_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 tha 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; > +} > + > +static int si476x_radio_g_chip_ident(struct file *file, void *fh, > + struct v4l2_dbg_chip_ident *chip) > +{ > + if (chip->match.type == V4L2_CHIP_MATCH_HOST && > + v4l2_chip_match_host(&chip->match)) > + return 0; > + return -EINVAL; > +} > + > + > +#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, > + 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 unsigned int si476x_radio_fops_poll(struct file *file, > + struct poll_table_struct *pts) > +{ > + struct si476x_radio *radio = video_drvdata(file); > + unsigned long req_events = poll_requested_events(pts); > + int err = v4l2_ctrl_poll(file, pts); > + > + if (req_events & (POLLIN | POLLRDNORM)) { > + if (atomic_read(&radio->core->is_alive)) > + poll_wait(file, &radio->core->rds_read_queue, pts); > + > + if (!atomic_read(&radio->core->is_alive)) > + err = POLLHUP; > + > + if (!kfifo_is_empty(&radio->core->rds_fifo)) > + err = POLLIN | POLLRDNORM; > + } > + > + 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, > + > + .vidioc_g_chip_ident = si476x_radio_g_chip_ident, > +#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 int __devinit si476x_radio_init_debugfs(struct si476x_radio *radio) > +{ > + struct dentry *dentry; > + int ret; > + > + dentry = debugfs_create_dir(dev_name(radio->v4l2dev.dev), NULL); > + if (IS_ERR(dentry)) { > + ret = PTR_ERR(dentry); > + goto exit; > + } > + radio->debugfs = dentry; > + > + dentry = debugfs_create_file("acf", S_IRUGO, > + radio->debugfs, radio, &radio_acf_fops); > + if (IS_ERR(dentry)) { > + ret = PTR_ERR(dentry); > + goto cleanup; > + } > + > + dentry = debugfs_create_file("rds_blckcnt", S_IRUGO, > + radio->debugfs, radio, &radio_rds_blckcnt_fops); > + if (IS_ERR(dentry)) { > + ret = PTR_ERR(dentry); > + goto cleanup; > + } > + > + dentry = debugfs_create_file("agc", S_IRUGO, > + radio->debugfs, radio, &radio_agc_fops); > + if (IS_ERR(dentry)) { > + ret = PTR_ERR(dentry); > + goto cleanup; > + } > + > + dentry = debugfs_create_file("rsq", S_IRUGO, > + radio->debugfs, radio, &radio_rsq_fops); > + if (IS_ERR(dentry)) { > + ret = PTR_ERR(dentry); > + goto cleanup; > + } > + > + dentry = debugfs_create_file("rsq_primary", S_IRUGO, > + radio->debugfs, radio, &radio_rsq_primary_fops); What these files are used for and how to interpret the contents should be documented somewhere. Usually a document in Documentation/video4linux is a good place for that. BTW: have you tested compiling this driver if debugfs is not configured? > + if (IS_ERR(dentry)) { > + ret = PTR_ERR(dentry); > + goto cleanup; > + } > + > + return 0; > +cleanup: > + debugfs_remove_recursive(radio->debugfs); > +exit: > + return ret; > +} > + > + > +static int __devinit 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 __devinit si476x_radio_probe(struct platform_device *pdev) > +{ > + int rval; > + struct si476x_radio *radio; > + > + 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; > + > + video_set_drvdata(&radio->videodev, radio); > + platform_set_drvdata(pdev, radio); > + > + set_bit(V4L2_FL_USE_FH_PRIO, &radio->videodev.flags); > + > + 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)) { > + struct v4l2_ctrl *ctrl; > + > + 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; > + > + rval = si476x_radio_add_new_custom(radio, SI476X_IDX_DEEMPHASIS); > + if (rval < 0) > + goto exit; > + > + rval = si476x_radio_add_new_custom(radio, SI476X_IDX_RDS_RECEPTION); > + if (rval < 0) > + 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); > + si476x_radio_add_new_custom(radio, SI476X_IDX_DIVERSITY_MODE); > + if (rval < 0) > + goto exit; > + > + 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; > + } > + > + rval = si476x_radio_init_debugfs(radio); > + if (rval < 0) { > + dev_err(&pdev->dev, "Could not creat debugfs interface\n"); > + goto exit; > + } > + > + 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 = { > + .probe = si476x_radio_probe, > + .remove = __devexit_p(si476x_radio_remove), > + .driver = { > + .name = DRIVER_NAME, > + .owner = THIS_MODULE, > + }, > +}; > + > +static int __init si476x_module_init(void) > +{ > + return platform_driver_register(&si476x_radio_driver); > +} > +module_init(si476x_module_init); > + > +static void __exit si476x_module_exit(void) > +{ > + platform_driver_unregister(&si476x_radio_driver); > +} > +module_exit(si476x_module_exit); > + > +MODULE_AUTHOR("Andrey Smirnov <andrey.smirnov@convergeddevices.net>"); > +MODULE_DESCRIPTION("Driver for Si4761/64/68 AM/FM Radio MFD Cell"); > +MODULE_LICENSE("GPL"); > Regards, Hans -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hello Andrey, On Tue, Oct 23, 2012 at 10:44 PM, Andrey Smirnov <andrey.smirnov@convergeddevices.net> wrote: > This commit adds a driver that exposes all the radio related > functionality of the Si476x series of chips via the V4L2 subsystem. > > Signed-off-by: Andrey Smirnov <andrey.smirnov@convergeddevices.net> > --- > drivers/media/radio/Kconfig | 17 + > drivers/media/radio/Makefile | 1 + > drivers/media/radio/radio-si476x.c | 1549 ++++++++++++++++++++++++++++++++++++ > 3 files changed, 1567 insertions(+) > create mode 100644 drivers/media/radio/radio-si476x.c > > diff --git a/drivers/media/radio/Kconfig b/drivers/media/radio/Kconfig > index 8090b87..3c79d09 100644 > --- a/drivers/media/radio/Kconfig > +++ b/drivers/media/radio/Kconfig > @@ -16,6 +16,23 @@ config RADIO_SI470X > bool "Silicon Labs Si470x FM Radio Receiver support" > depends on VIDEO_V4L2 > > +config RADIO_SI476X > + tristate "Silicon Laboratories Si476x I2C FM Radio" > + depends on I2C && VIDEO_V4L2 > + select MFD_CORE > + select MFD_SI476X_CORE > + select SND_SOC_SI476X > + ---help--- > + Choose Y here if you have this FM radio chip. > + > + In order to control your radio card, you will need to use programs > + that are compatible with the Video For Linux 2 API. Information on > + this API and pointers to "v4l2" programs may be found at > + <file:Documentation/video4linux/API.html>. > + > + To compile this driver as a module, choose M here: the > + module will be called radio-si476x. > + > source "drivers/media/radio/si470x/Kconfig" > > config USB_MR800 > diff --git a/drivers/media/radio/Makefile b/drivers/media/radio/Makefile > index c03ce4f..c4618e0 100644 > --- a/drivers/media/radio/Makefile > +++ b/drivers/media/radio/Makefile > @@ -19,6 +19,7 @@ obj-$(CONFIG_RADIO_GEMTEK) += radio-gemtek.o > obj-$(CONFIG_RADIO_TRUST) += radio-trust.o > obj-$(CONFIG_I2C_SI4713) += si4713-i2c.o > obj-$(CONFIG_RADIO_SI4713) += radio-si4713.o > +obj-$(CONFIG_RADIO_SI476X) += radio-si476x.o > obj-$(CONFIG_RADIO_MIROPCM20) += radio-miropcm20.o > obj-$(CONFIG_USB_DSBR) += dsbr100.o > obj-$(CONFIG_RADIO_SI470X) += si470x/ > diff --git a/drivers/media/radio/radio-si476x.c b/drivers/media/radio/radio-si476x.c > new file mode 100644 > index 0000000..c8fa90f > --- /dev/null > +++ b/drivers/media/radio/radio-si476x.c > @@ -0,0 +1,1549 @@ > +#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 <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) (0b10000000 & (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; > +} > + > +#define PRIVATE_CTL_IDX(x) (x - V4L2_CID_PRIVATE_BASE) > + > +static int si476x_radio_s_ctrl(struct v4l2_ctrl *ctrl); > +static int si476x_radio_g_volatile_ctrl(struct v4l2_ctrl *ctrl); > + > +static const char * const deemphasis[] = { > + "75 us", > + "50 us", > +}; > + > +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 w/secondary", > + [SI476X_IDX_PHDIV_PRIMARY_ANTENNA] = "primary(primary antenna)", > + [SI476X_IDX_PHDIV_SECONDARY_ANTENNA] = "primary(seconadary antenna)", > + [SI476X_IDX_PHDIV_SECONDARY_COMBINING] = "secondary w/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_DEEMPHASIS, > + SI476X_IDX_RDS_RECEPTION, > + SI476X_IDX_DIVERSITY_MODE, > + SI476X_IDX_INTERCHIP_LINK, > +}; > + > +static struct v4l2_ctrl_config si476x_ctrls[] = { > + /* > + Tuning parameters > + 'max tune errors' is shared for both AM/FM mode of operation > + */ > + [SI476X_IDX_RSSI_THRESHOLD] = { > + .ops = &si476x_ctrl_ops, > + .id = SI476X_CID_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 = SI476X_CID_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 = SI476X_CID_MAX_TUNE_ERROR, > + .type = V4L2_CTRL_TYPE_INTEGER, > + .name = "max tune errors", > + .min = 0, > + .max = 126 * 2, > + .step = 2, > + }, > + /* > + Region specific parameters > + */ > + [SI476X_IDX_HARMONICS_COUNT] = { > + .ops = &si476x_ctrl_ops, > + .id = SI476X_CID_HARMONICS_COUNT, > + .type = V4L2_CTRL_TYPE_INTEGER, > + > + .name = "count of harmonics to reject", > + .min = 0, > + .max = 20, > + .step = 1, > + }, > + [SI476X_IDX_DEEMPHASIS] = { > + .ops = &si476x_ctrl_ops, > + .id = SI476X_CID_DEEMPHASIS, > + .type = V4L2_CTRL_TYPE_MENU, > + .name = "de-emphassis", > + .qmenu = deemphasis, > + .min = 0, > + .max = ARRAY_SIZE(deemphasis) - 1, > + .def = 0, > + }, > + [SI476X_IDX_RDS_RECEPTION] = { > + .ops = &si476x_ctrl_ops, > + .id = SI476X_CID_RDS_RECEPTION, > + .type = V4L2_CTRL_TYPE_BOOLEAN, > + .name = "rds", > + .min = 0, > + .max = 1, > + .step = 1, > + }, > + [SI476X_IDX_DIVERSITY_MODE] = { > + .ops = &si476x_ctrl_ops, > + .id = SI476X_CID_DIVERSITY_MODE, > + .type = V4L2_CTRL_TYPE_MENU, > + .name = "phase diversity mode", > + .qmenu = phase_diversity_modes, > + .min = 0, > + .max = ARRAY_SIZE(phase_diversity_modes) - 1, > + }, > + [SI476X_IDX_INTERCHIP_LINK] = { > + .ops = &si476x_ctrl_ops, > + .id = SI476X_CID_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 in. 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 Recieved Signal Quality(RSQ) status > + * @rds_blckcnt: Get recived 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 > + * > + * @core: Pointer to underlying core device > + * @videodev: Pointer to video device created by V4L2 subsystem > + * @ops: Vtable of functions. See struct si476x_radio_ops for details > + * @kref: Reference counter > + * @core_lock: An r/w semaphore to brebvent the deletion of underlying > + * 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_dev_to_radio(struct v4l2_device *d) > +{ > + return container_of(d, struct si476x_radio, v4l2dev); > +} > + > +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); > + > + strlcpy(capability->driver, radio->v4l2dev.name, > + sizeof(capability->driver)); > + strlcpy(capability->card, DRIVER_CARD, sizeof(capability->card)); > + snprintf(capability->bus_info, sizeof(capability->bus_info), > + "platform:%s", radio->v4l2dev.name); > + > + capability->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)) > + capability->device_caps |= V4L2_CAP_RDS_CAPTURE > + | V4L2_CAP_READWRITE; > + si476x_core_unlock(radio->core); > + > + capability->capabilities = capability->device_caps | V4L2_CAP_DEVICE_CAPS; > + 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)) { > + strlcpy(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)) > + strlcpy(tuner->name, "AM/FM (primary)", sizeof(tuner->name)); > + else > + strlcpy(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 { > + strlcpy(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, > + 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, > + struct v4l2_frequency *f) > +{ > + int err; > + 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 = (f->frequency > 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); > + > + f->frequency = clamp(f->frequency, > + si476x_bands[band].rangelow, > + si476x_bands[band].rangehigh); > + > + if (si476x_radio_freq_is_inside_of_the_band(f->frequency, 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, > + f->frequency); > + 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, 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(!seek->rangelow) { > + err = regmap_read(radio->core->regmap, > + SI476X_PROP_SEEK_BAND_BOTTOM, > + &rangelow); > + if (!err) > + rangelow = si476x_to_v4l2(radio->core, rangelow); > + else > + goto unlock; > + } > + if(!seek->rangehigh) { > + err = regmap_read(radio->core->regmap, > + SI476X_PROP_SEEK_BAND_TOP, > + &rangehigh); > + if (!err) > + rangehigh = si476x_to_v4l2(radio->core, rangehigh); > + else > + goto unlock; > + } > + > + 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 SI476X_CID_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 SI476X_CID_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 SI476X_CID_RSSI_THRESHOLD: > + retval = regmap_write(radio->core->regmap, > + SI476X_PROP_VALID_RSSI_THRESHOLD, > + ctrl->val); > + break; > + case SI476X_CID_SNR_THRESHOLD: > + retval = regmap_write(radio->core->regmap, > + SI476X_PROP_VALID_SNR_THRESHOLD, > + ctrl->val); > + break; > + case SI476X_CID_MAX_TUNE_ERROR: > + retval = regmap_write(radio->core->regmap, > + SI476X_PROP_VALID_MAX_TUNE_ERROR, > + ctrl->val); > + break; > + case SI476X_CID_RDS_RECEPTION: > + /* > + * It looks like RDS related properties are > + * inaccesable 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 SI476X_CID_DEEMPHASIS: > + retval = regmap_write(radio->core->regmap, > + SI476X_PROP_AUDIO_DEEMPHASIS, > + ctrl->val); > + break; > + > + case SI476X_CID_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 tha 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; > +} > + > +static int si476x_radio_g_chip_ident(struct file *file, void *fh, > + struct v4l2_dbg_chip_ident *chip) > +{ > + if (chip->match.type == V4L2_CHIP_MATCH_HOST && > + v4l2_chip_match_host(&chip->match)) > + return 0; > + return -EINVAL; > +} > + > + > +#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, > + 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 unsigned int si476x_radio_fops_poll(struct file *file, > + struct poll_table_struct *pts) > +{ > + struct si476x_radio *radio = video_drvdata(file); > + unsigned long req_events = poll_requested_events(pts); > + int err = v4l2_ctrl_poll(file, pts); > + > + if (req_events & (POLLIN | POLLRDNORM)) { > + if (atomic_read(&radio->core->is_alive)) > + poll_wait(file, &radio->core->rds_read_queue, pts); > + > + if (!atomic_read(&radio->core->is_alive)) > + err = POLLHUP; > + > + if (!kfifo_is_empty(&radio->core->rds_fifo)) > + err = POLLIN | POLLRDNORM; > + } > + > + return err; Could you please check this function? Is it better to declare "err" as unsigned int? It looks like v4l2_ctrl_poll() returns unsigned int and this function needs to return unsigned int also.
On 11/16/2012 07:02 AM, Hans Verkuil wrote: > Hi Andrey, > > Some more comments... > > On Tue October 23 2012 20:44:31 Andrey Smirnov wrote: >> This commit adds a driver that exposes all the radio related >> functionality of the Si476x series of chips via the V4L2 subsystem. >> >> Signed-off-by: Andrey Smirnov <andrey.smirnov@convergeddevices.net> >> --- >> drivers/media/radio/Kconfig | 17 + >> drivers/media/radio/Makefile | 1 + >> drivers/media/radio/radio-si476x.c | 1549 ++++++++++++++++++++++++++++++++++++ >> 3 files changed, 1567 insertions(+) >> create mode 100644 drivers/media/radio/radio-si476x.c >> > <cut> > >> diff --git a/drivers/media/radio/radio-si476x.c b/drivers/media/radio/radio-si476x.c >> new file mode 100644 >> index 0000000..c8fa90f >> --- /dev/null >> +++ b/drivers/media/radio/radio-si476x.c >> @@ -0,0 +1,1549 @@ >> +#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 <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) (0b10000000 & (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; >> +} >> + >> +#define PRIVATE_CTL_IDX(x) (x - V4L2_CID_PRIVATE_BASE) > No. The new control IDs need to be added to include/uapi/linux/v4l2-controls.h > with unique IDs. V4L2_CID_PRIVATE_BASE must not be used anymore for new controls. > > Since Halli Manjunatha hasn't worked on a new version of his patch with the new > fm controls it might be something you want to take on (I'm referring to the FM RX > control class). Should I move all controls there, even chip specific ones, like SI476X_CID_HARMONICS_COUNT or SI476X_CID_DIVERSITY_MODE? -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/media/radio/Kconfig b/drivers/media/radio/Kconfig index 8090b87..3c79d09 100644 --- a/drivers/media/radio/Kconfig +++ b/drivers/media/radio/Kconfig @@ -16,6 +16,23 @@ config RADIO_SI470X bool "Silicon Labs Si470x FM Radio Receiver support" depends on VIDEO_V4L2 +config RADIO_SI476X + tristate "Silicon Laboratories Si476x I2C FM Radio" + depends on I2C && VIDEO_V4L2 + select MFD_CORE + select MFD_SI476X_CORE + select SND_SOC_SI476X + ---help--- + Choose Y here if you have this FM radio chip. + + In order to control your radio card, you will need to use programs + that are compatible with the Video For Linux 2 API. Information on + this API and pointers to "v4l2" programs may be found at + <file:Documentation/video4linux/API.html>. + + To compile this driver as a module, choose M here: the + module will be called radio-si476x. + source "drivers/media/radio/si470x/Kconfig" config USB_MR800 diff --git a/drivers/media/radio/Makefile b/drivers/media/radio/Makefile index c03ce4f..c4618e0 100644 --- a/drivers/media/radio/Makefile +++ b/drivers/media/radio/Makefile @@ -19,6 +19,7 @@ obj-$(CONFIG_RADIO_GEMTEK) += radio-gemtek.o obj-$(CONFIG_RADIO_TRUST) += radio-trust.o obj-$(CONFIG_I2C_SI4713) += si4713-i2c.o obj-$(CONFIG_RADIO_SI4713) += radio-si4713.o +obj-$(CONFIG_RADIO_SI476X) += radio-si476x.o obj-$(CONFIG_RADIO_MIROPCM20) += radio-miropcm20.o obj-$(CONFIG_USB_DSBR) += dsbr100.o obj-$(CONFIG_RADIO_SI470X) += si470x/ diff --git a/drivers/media/radio/radio-si476x.c b/drivers/media/radio/radio-si476x.c new file mode 100644 index 0000000..c8fa90f --- /dev/null +++ b/drivers/media/radio/radio-si476x.c @@ -0,0 +1,1549 @@ +#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 <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) (0b10000000 & (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; +} + +#define PRIVATE_CTL_IDX(x) (x - V4L2_CID_PRIVATE_BASE) + +static int si476x_radio_s_ctrl(struct v4l2_ctrl *ctrl); +static int si476x_radio_g_volatile_ctrl(struct v4l2_ctrl *ctrl); + +static const char * const deemphasis[] = { + "75 us", + "50 us", +}; + +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 w/secondary", + [SI476X_IDX_PHDIV_PRIMARY_ANTENNA] = "primary(primary antenna)", + [SI476X_IDX_PHDIV_SECONDARY_ANTENNA] = "primary(seconadary antenna)", + [SI476X_IDX_PHDIV_SECONDARY_COMBINING] = "secondary w/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_DEEMPHASIS, + SI476X_IDX_RDS_RECEPTION, + SI476X_IDX_DIVERSITY_MODE, + SI476X_IDX_INTERCHIP_LINK, +}; + +static struct v4l2_ctrl_config si476x_ctrls[] = { + /* + Tuning parameters + 'max tune errors' is shared for both AM/FM mode of operation + */ + [SI476X_IDX_RSSI_THRESHOLD] = { + .ops = &si476x_ctrl_ops, + .id = SI476X_CID_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 = SI476X_CID_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 = SI476X_CID_MAX_TUNE_ERROR, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "max tune errors", + .min = 0, + .max = 126 * 2, + .step = 2, + }, + /* + Region specific parameters + */ + [SI476X_IDX_HARMONICS_COUNT] = { + .ops = &si476x_ctrl_ops, + .id = SI476X_CID_HARMONICS_COUNT, + .type = V4L2_CTRL_TYPE_INTEGER, + + .name = "count of harmonics to reject", + .min = 0, + .max = 20, + .step = 1, + }, + [SI476X_IDX_DEEMPHASIS] = { + .ops = &si476x_ctrl_ops, + .id = SI476X_CID_DEEMPHASIS, + .type = V4L2_CTRL_TYPE_MENU, + .name = "de-emphassis", + .qmenu = deemphasis, + .min = 0, + .max = ARRAY_SIZE(deemphasis) - 1, + .def = 0, + }, + [SI476X_IDX_RDS_RECEPTION] = { + .ops = &si476x_ctrl_ops, + .id = SI476X_CID_RDS_RECEPTION, + .type = V4L2_CTRL_TYPE_BOOLEAN, + .name = "rds", + .min = 0, + .max = 1, + .step = 1, + }, + [SI476X_IDX_DIVERSITY_MODE] = { + .ops = &si476x_ctrl_ops, + .id = SI476X_CID_DIVERSITY_MODE, + .type = V4L2_CTRL_TYPE_MENU, + .name = "phase diversity mode", + .qmenu = phase_diversity_modes, + .min = 0, + .max = ARRAY_SIZE(phase_diversity_modes) - 1, + }, + [SI476X_IDX_INTERCHIP_LINK] = { + .ops = &si476x_ctrl_ops, + .id = SI476X_CID_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 in. 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 Recieved Signal Quality(RSQ) status + * @rds_blckcnt: Get recived 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 + * + * @core: Pointer to underlying core device + * @videodev: Pointer to video device created by V4L2 subsystem + * @ops: Vtable of functions. See struct si476x_radio_ops for details + * @kref: Reference counter + * @core_lock: An r/w semaphore to brebvent the deletion of underlying + * 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_dev_to_radio(struct v4l2_device *d) +{ + return container_of(d, struct si476x_radio, v4l2dev); +} + +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); + + strlcpy(capability->driver, radio->v4l2dev.name, + sizeof(capability->driver)); + strlcpy(capability->card, DRIVER_CARD, sizeof(capability->card)); + snprintf(capability->bus_info, sizeof(capability->bus_info), + "platform:%s", radio->v4l2dev.name); + + capability->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)) + capability->device_caps |= V4L2_CAP_RDS_CAPTURE + | V4L2_CAP_READWRITE; + si476x_core_unlock(radio->core); + + capability->capabilities = capability->device_caps | V4L2_CAP_DEVICE_CAPS; + 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)) { + strlcpy(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)) + strlcpy(tuner->name, "AM/FM (primary)", sizeof(tuner->name)); + else + strlcpy(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 { + strlcpy(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, + 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, + struct v4l2_frequency *f) +{ + int err; + 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 = (f->frequency > 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); + + f->frequency = clamp(f->frequency, + si476x_bands[band].rangelow, + si476x_bands[band].rangehigh); + + if (si476x_radio_freq_is_inside_of_the_band(f->frequency, 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, + f->frequency); + 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, 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(!seek->rangelow) { + err = regmap_read(radio->core->regmap, + SI476X_PROP_SEEK_BAND_BOTTOM, + &rangelow); + if (!err) + rangelow = si476x_to_v4l2(radio->core, rangelow); + else + goto unlock; + } + if(!seek->rangehigh) { + err = regmap_read(radio->core->regmap, + SI476X_PROP_SEEK_BAND_TOP, + &rangehigh); + if (!err) + rangehigh = si476x_to_v4l2(radio->core, rangehigh); + else + goto unlock; + } + + 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 SI476X_CID_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 SI476X_CID_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 SI476X_CID_RSSI_THRESHOLD: + retval = regmap_write(radio->core->regmap, + SI476X_PROP_VALID_RSSI_THRESHOLD, + ctrl->val); + break; + case SI476X_CID_SNR_THRESHOLD: + retval = regmap_write(radio->core->regmap, + SI476X_PROP_VALID_SNR_THRESHOLD, + ctrl->val); + break; + case SI476X_CID_MAX_TUNE_ERROR: + retval = regmap_write(radio->core->regmap, + SI476X_PROP_VALID_MAX_TUNE_ERROR, + ctrl->val); + break; + case SI476X_CID_RDS_RECEPTION: + /* + * It looks like RDS related properties are + * inaccesable 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 SI476X_CID_DEEMPHASIS: + retval = regmap_write(radio->core->regmap, + SI476X_PROP_AUDIO_DEEMPHASIS, + ctrl->val); + break; + + case SI476X_CID_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 tha 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; +} + +static int si476x_radio_g_chip_ident(struct file *file, void *fh, + struct v4l2_dbg_chip_ident *chip) +{ + if (chip->match.type == V4L2_CHIP_MATCH_HOST && + v4l2_chip_match_host(&chip->match)) + return 0; + return -EINVAL; +} + + +#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, + 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 unsigned int si476x_radio_fops_poll(struct file *file, + struct poll_table_struct *pts) +{ + struct si476x_radio *radio = video_drvdata(file); + unsigned long req_events = poll_requested_events(pts); + int err = v4l2_ctrl_poll(file, pts); + + if (req_events & (POLLIN | POLLRDNORM)) { + if (atomic_read(&radio->core->is_alive)) + poll_wait(file, &radio->core->rds_read_queue, pts); + + if (!atomic_read(&radio->core->is_alive)) + err = POLLHUP; + + if (!kfifo_is_empty(&radio->core->rds_fifo)) + err = POLLIN | POLLRDNORM; + } + + 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, + + .vidioc_g_chip_ident = si476x_radio_g_chip_ident, +#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 int __devinit si476x_radio_init_debugfs(struct si476x_radio *radio) +{ + struct dentry *dentry; + int ret; + + dentry = debugfs_create_dir(dev_name(radio->v4l2dev.dev), NULL); + if (IS_ERR(dentry)) { + ret = PTR_ERR(dentry); + goto exit; + } + radio->debugfs = dentry; + + dentry = debugfs_create_file("acf", S_IRUGO, + radio->debugfs, radio, &radio_acf_fops); + if (IS_ERR(dentry)) { + ret = PTR_ERR(dentry); + goto cleanup; + } + + dentry = debugfs_create_file("rds_blckcnt", S_IRUGO, + radio->debugfs, radio, &radio_rds_blckcnt_fops); + if (IS_ERR(dentry)) { + ret = PTR_ERR(dentry); + goto cleanup; + } + + dentry = debugfs_create_file("agc", S_IRUGO, + radio->debugfs, radio, &radio_agc_fops); + if (IS_ERR(dentry)) { + ret = PTR_ERR(dentry); + goto cleanup; + } + + dentry = debugfs_create_file("rsq", S_IRUGO, + radio->debugfs, radio, &radio_rsq_fops); + if (IS_ERR(dentry)) { + ret = PTR_ERR(dentry); + goto cleanup; + } + + dentry = debugfs_create_file("rsq_primary", S_IRUGO, + radio->debugfs, radio, &radio_rsq_primary_fops); + if (IS_ERR(dentry)) { + ret = PTR_ERR(dentry); + goto cleanup; + } + + return 0; +cleanup: + debugfs_remove_recursive(radio->debugfs); +exit: + return ret; +} + + +static int __devinit 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 __devinit si476x_radio_probe(struct platform_device *pdev) +{ + int rval; + struct si476x_radio *radio; + + 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; + + video_set_drvdata(&radio->videodev, radio); + platform_set_drvdata(pdev, radio); + + set_bit(V4L2_FL_USE_FH_PRIO, &radio->videodev.flags); + + 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)) { + struct v4l2_ctrl *ctrl; + + 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; + + rval = si476x_radio_add_new_custom(radio, SI476X_IDX_DEEMPHASIS); + if (rval < 0) + goto exit; + + rval = si476x_radio_add_new_custom(radio, SI476X_IDX_RDS_RECEPTION); + if (rval < 0) + 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); + si476x_radio_add_new_custom(radio, SI476X_IDX_DIVERSITY_MODE); + if (rval < 0) + goto exit; + + 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; + } + + rval = si476x_radio_init_debugfs(radio); + if (rval < 0) { + dev_err(&pdev->dev, "Could not creat debugfs interface\n"); + goto exit; + } + + 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 = { + .probe = si476x_radio_probe, + .remove = __devexit_p(si476x_radio_remove), + .driver = { + .name = DRIVER_NAME, + .owner = THIS_MODULE, + }, +}; + +static int __init si476x_module_init(void) +{ + return platform_driver_register(&si476x_radio_driver); +} +module_init(si476x_module_init); + +static void __exit si476x_module_exit(void) +{ + platform_driver_unregister(&si476x_radio_driver); +} +module_exit(si476x_module_exit); + +MODULE_AUTHOR("Andrey Smirnov <andrey.smirnov@convergeddevices.net>"); +MODULE_DESCRIPTION("Driver for Si4761/64/68 AM/FM Radio MFD Cell"); +MODULE_LICENSE("GPL");
This commit adds a driver that exposes all the radio related functionality of the Si476x series of chips via the V4L2 subsystem. Signed-off-by: Andrey Smirnov <andrey.smirnov@convergeddevices.net> --- drivers/media/radio/Kconfig | 17 + drivers/media/radio/Makefile | 1 + drivers/media/radio/radio-si476x.c | 1549 ++++++++++++++++++++++++++++++++++++ 3 files changed, 1567 insertions(+) create mode 100644 drivers/media/radio/radio-si476x.c