[PATCH v2 5/6] Add a V4L2 driver for SI476X MFD
From: Andrey Smirnov
Date: Fri Oct 05 2012 - 21:56:27 EST
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@xxxxxxxxxxxxxxxxxxxx>
---
drivers/media/radio/Kconfig | 17 +
drivers/media/radio/Makefile | 1 +
drivers/media/radio/radio-si476x.c | 1153 ++++++++++++++++++++++++++++++++++++
3 files changed, 1171 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..2d943da
--- /dev/null
+++ b/drivers/media/radio/radio-si476x.c
@@ -0,0 +1,1153 @@
+#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 <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 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,
+ },
+};
+
+#define PRIVATE_CTL_IDX(x) (x - V4L2_CID_PRIVATE_BASE)
+
+static int si476x_s_ctrl(struct v4l2_ctrl *ctrl);
+
+static const char * const deemphasis[] = {
+ "75 us",
+ "50 us",
+};
+
+static const struct v4l2_ctrl_ops si476x_ctrl_ops = {
+ .s_ctrl = si476x_s_ctrl,
+};
+
+static const struct v4l2_ctrl_config si476x_ctrls[] = {
+ /*
+ Tuning parameters
+ 'max tune errors' is shared for both AM/FM mode of operation
+ */
+ {
+ .ops = &si476x_ctrl_ops,
+ .id = SI476X_CID_RSSI_THRESHOLD,
+ .name = "valid rssi threshold",
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .min = -128,
+ .max = 127,
+ .step = 1,
+ },
+ {
+ .ops = &si476x_ctrl_ops,
+ .id = SI476X_CID_SNR_THRESHOLD,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "valid snr threshold",
+ .min = -128,
+ .max = 127,
+ .step = 1,
+ },
+ {
+ .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
+ */
+ {
+ .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,
+ },
+ {
+ .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,
+ },
+ {
+ .ops = &si476x_ctrl_ops,
+ .id = SI476X_CID_RDS_RECEPTION,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "rds",
+ .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;
+
+ u32 rangelow;
+ u32 rangehigh;
+ u32 spacing;
+ 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);
+}
+
+
+static int si476x_radio_initialize_mode(struct si476x_radio *);
+
+/*
+ * si476x_vidioc_querycap - query device capabilities
+ */
+static int si476x_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));
+ strlcpy(capability->bus_info, radio->v4l2dev.name, sizeof(capability->bus_info));
+
+ capability->device_caps = V4L2_CAP_TUNER
+ | V4L2_CAP_RADIO
+ | V4L2_CAP_RDS_CAPTURE
+ | V4L2_CAP_READWRITE
+ | V4L2_CAP_HW_FREQ_SEEK;
+ capability->capabilities = \
+ capability->device_caps | V4L2_CAP_DEVICE_CAPS;
+ return 0;
+}
+
+static int si476x_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_SI4762:
+ case SI476X_CHIP_SI4763:
+ 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:
+ case SI476X_CHIP_SI4769:
+ 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_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);
+
+ if (tuner->index != 0)
+ return -EINVAL;
+
+ tuner->type = V4L2_TUNER_RADIO;
+ tuner->capability = V4L2_TUNER_CAP_LOW /* Measure frequncies
+ * in multiples of
+ * 62.5 Hz */
+ | V4L2_TUNER_CAP_STEREO
+ | V4L2_TUNER_CAP_HWSEEK_BOUNDED
+ | V4L2_TUNER_CAP_HWSEEK_WRAP;
+
+ switch (radio->core->chip_id) {
+ /* AM/FM tuners -- all bands are supported */
+ case SI476X_CHIP_SI4764:
+ if (radio->core->diversity_mode == SI476X_PHDIV_SECONDARY_ANTENNA ||
+ radio->core->diversity_mode == SI476X_PHDIV_SECONDARY_COMBINING) {
+ strlcpy(tuner->name, "FM (secondary)", sizeof(tuner->name));
+ tuner->capability = 0;
+ tuner->rxsubchans = 0;
+ break;
+ }
+
+ if (radio->core->diversity_mode == SI476X_PHDIV_PRIMARY_ANTENNA ||
+ radio->core->diversity_mode == SI476X_PHDIV_PRIMARY_COMBINING)
+ strlcpy(tuner->name, "AM/FM (primary)", sizeof(tuner->name));
+
+ case SI476X_CHIP_SI4761: /* FALLTHROUGH */
+ case SI476X_CHIP_SI4762:
+ case SI476X_CHIP_SI4763:
+ if (radio->core->chip_id != SI476X_CHIP_SI4764)
+ 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;
+
+ break;
+ /* FM companion tuner chips -- only FM bands are
+ * supported */
+ case SI476X_CHIP_SI4768:
+ case SI476X_CHIP_SI4769:
+ 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;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ tuner->audmode = radio->audmode;
+
+ tuner->afc = 1;
+ tuner->rangehigh = si476x_bands[SI476X_BAND_FM].rangehigh;
+
+ si476x_core_lock(radio->core);
+ {
+ struct si476x_rsq_status_args args = {
+ .primary = false,
+ .rsqack = false,
+ .attune = false,
+ .cancel = false,
+ .stcack = false,
+ };
+ if (radio->ops->rsq_status) {
+ 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;
+ }
+ } else {
+ tuner->signal = 0;
+ err = -EINVAL;
+ }
+ }
+ si476x_core_unlock(radio->core);
+
+ return err;
+}
+
+static int si476x_s_tuner(struct file *file, void *priv,
+ struct v4l2_tuner *tuner)
+{
+ struct si476x_radio *radio = video_drvdata(file);
+
+ if (tuner->index != 0)
+ return -EINVAL;
+ else if (tuner->audmode == V4L2_TUNER_MODE_MONO ||
+ tuner->audmode == V4L2_TUNER_MODE_STEREO)
+ radio->audmode = tuner->audmode;
+
+ return 0;
+}
+
+static int si476x_switch_func(struct si476x_radio *radio, enum si476x_func func)
+{
+ int err;
+
+ /*
+ 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;
+
+ err = si476x_core_stop(radio->core, true);
+ if (err < 0)
+ return err;
+
+ radio->core->power_up_parameters.func = func;
+
+ err = si476x_core_start(radio->core, true);
+ if (!err)
+ err = si476x_radio_initialize_mode(radio);
+
+ return err;
+}
+
+static int si476x_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);
+
+ f->type = V4L2_TUNER_RADIO;
+ 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_s_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);
+
+ /* Remap rangewlow - 1 and rangehigh + 1 */
+ if (f->frequency == si476x_bands[SI476X_BAND_FM].rangelow - 1 ||
+ f->frequency == si476x_bands[SI476X_BAND_AM].rangelow - 1)
+ f->frequency += 1;
+
+ if (f->frequency == si476x_bands[SI476X_BAND_FM].rangehigh + 1 ||
+ f->frequency == si476x_bands[SI476X_BAND_AM].rangehigh + 1)
+ f->frequency -= 1;
+
+ switch (radio->core->chip_id) {
+ case SI476X_CHIP_SI4764:
+ if (radio->core->diversity_mode == SI476X_PHDIV_SECONDARY_ANTENNA ||
+ radio->core->diversity_mode == SI476X_PHDIV_SECONDARY_COMBINING)
+ if (f->frequency < si476x_bands[SI476X_BAND_FM].rangelow ||
+ f->frequency > si476x_bands[SI476X_BAND_FM].rangehigh) {
+ err = -EDOM;
+ goto unlock;
+ }
+ case SI476X_CHIP_SI4761: /* FALLTHROUGH */
+ case SI476X_CHIP_SI4762:
+ case SI476X_CHIP_SI4763:
+ if (f->frequency < si476x_bands[SI476X_BAND_AM].rangelow ||
+ f->frequency > si476x_bands[SI476X_BAND_FM].rangehigh) {
+ err = -EDOM;
+ goto unlock;
+ }
+ break;
+ case SI476X_CHIP_SI4768:
+ case SI476X_CHIP_SI4769:
+ if (f->frequency < si476x_bands[SI476X_BAND_FM].rangelow ||
+ f->frequency > si476x_bands[SI476X_BAND_FM].rangehigh) {
+ err = -EDOM;
+ goto unlock;
+ }
+ break;
+ default:
+ err = -EINVAL;
+ goto unlock;
+ }
+
+
+ if (f->frequency < si476x_bands[SI476X_BAND_FM].rangelow)
+ si476x_switch_func(radio, SI476X_FUNC_AM_RECEIVER);
+ else
+ si476x_switch_func(radio, SI476X_FUNC_FM_RECEIVER);
+
+ if (radio->ops->tune_freq) {
+ struct si476x_tune_freq_args args = {
+ .zifsr = false,
+ .hd = false,
+ .injside = SI476X_INJSIDE_AUTO,
+ .freq = v4l2_to_si476x(radio->core,
+ f->frequency),
+ .tunemode = SI476X_TM_VALIDATED_NORMAL_TUNE,
+ .smoothmetrics = SI476X_SM_INITIALIZE_AUDIO,
+ .antcap = 0,
+ };
+ err = radio->ops->tune_freq(radio->core, &args);
+ } else {
+ err = -ENOTTY;
+ }
+
+unlock:
+ si476x_core_unlock(radio->core);
+
+ return err;
+}
+
+static int si476x_s_hw_freq_seek(struct file *file, void *priv,
+ struct v4l2_hw_freq_seek *seek)
+{
+ int err;
+ u32 rangelow, rangehigh;
+ struct si476x_radio *radio = video_drvdata(file);
+
+ if (seek->tuner != 0 ||
+ seek->type != V4L2_TUNER_RADIO)
+ return -EINVAL;
+
+ si476x_core_lock(radio->core);
+
+ rangelow = (!seek->rangelow) ? radio->rangelow : seek->rangelow;
+ rangehigh = (!seek->rangehigh) ? radio->rangehigh : seek->rangehigh;
+
+ if ((rangelow >= si476x_bands[SI476X_BAND_FM].rangelow) &&
+ rangehigh <= si476x_bands[SI476X_BAND_FM].rangehigh) {
+ si476x_switch_func(radio, SI476X_FUNC_FM_RECEIVER);
+ } else if (rangelow >= si476x_bands[SI476X_BAND_AM].rangelow &&
+ rangehigh <= si476x_bands[SI476X_BAND_AM].rangehigh) {
+ si476x_switch_func(radio, SI476X_FUNC_AM_RECEIVER);
+ } else {
+ err = -EDOM;
+ goto unlock;
+ }
+
+ /* Cache the following parameters to imporve seek operation
+ * performance */
+ if (seek->rangehigh && radio->rangehigh != seek->rangehigh) {
+ err = si476x_core_set_seek_band_top(radio->core,
+ v4l2_to_hz(seek->rangehigh));
+ if (err)
+ goto unlock;
+ radio->rangehigh = seek->rangehigh;
+ }
+ if (seek->rangelow && radio->rangelow != seek->rangelow) {
+ err = si476x_core_set_seek_band_bottom(radio->core,
+ v4l2_to_hz(seek->rangelow));
+ if (err)
+ goto unlock;
+ radio->rangelow = seek->rangelow;
+ }
+ if (seek->spacing && radio->spacing != seek->spacing) {
+ err = si476x_core_set_frequency_spacing(radio->core,
+ v4l2_to_hz(seek->spacing));
+ if (err)
+ goto unlock;
+ radio->spacing = seek->spacing;
+ }
+
+
+ if (radio->ops->seek_start)
+ err = radio->ops->seek_start(radio->core,
+ seek->seek_upward,
+ seek->wrap_around);
+ else
+ err = -ENOTSUPP;
+
+
+unlock:
+ si476x_core_unlock(radio->core);
+
+ return err;
+}
+static int si476x_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ int old_value, retval, count;
+ struct si476x_radio *radio = v4l2_ctrl_handler_to_radio(ctrl->handler);
+
+ si476x_core_lock(radio->core);
+
+ switch (ctrl->id) {
+ case V4L2_CID_POWER_LINE_FREQUENCY:
+ old_value = si476x_core_get_audio_pwr_line_filter(radio->core);
+ if (old_value < 0) {
+ retval = old_value;
+ break;
+ }
+ count = old_value & 0x0F;
+
+ switch (ctrl->val) {
+ case V4L2_CID_POWER_LINE_FREQUENCY_DISABLED:
+ retval = si476x_core_set_audio_pwr_line_filter(radio->core,
+ false,
+ SI476X_POWER_GRID_50HZ,
+ count);
+ break;
+ case V4L2_CID_POWER_LINE_FREQUENCY_50HZ:
+ retval = si476x_core_set_audio_pwr_line_filter(radio->core,
+ (count > 0) ? true : false,
+ SI476X_POWER_GRID_50HZ,
+ count);
+ break;
+ case V4L2_CID_POWER_LINE_FREQUENCY_60HZ:
+ retval = si476x_core_set_audio_pwr_line_filter(radio->core,
+ (count > 0) ? true : false,
+ SI476X_POWER_GRID_60HZ,
+ count);
+ break;
+ default:
+ BUG();
+ break;
+ }
+ break;
+ case SI476X_CID_RSSI_THRESHOLD:
+ retval = si476x_core_set_valid_rssi_threshold(radio->core,
+ ctrl->val);
+ break;
+ case SI476X_CID_SNR_THRESHOLD:
+ retval = si476x_core_set_valid_snr_threshold(radio->core,
+ ctrl->val);
+ break;
+ case SI476X_CID_MAX_TUNE_ERROR:
+ retval = si476x_core_set_valid_max_tune_error(radio->core,
+ ctrl->val);
+ break;
+ case SI476X_CID_RDS_RECEPTION:
+ retval = si476x_core_set_rds_reception(radio->core,
+ ctrl->val);
+ break;
+ case SI476X_CID_DEEMPHASIS:
+ retval = si476x_core_set_audio_deemphasis(radio->core,
+ ctrl->val);
+ break;
+ case SI476X_CID_HARMONICS_COUNT:
+ old_value = si476x_core_get_audio_pwr_line_filter(radio->core);
+ if (old_value < 0) {
+ retval = old_value;
+ break;
+ }
+
+ retval = si476x_core_set_audio_pwr_line_filter(radio->core,
+ (ctrl->val > 0) ? true : false,
+ !!(PWRLINEFLTR & old_value),
+ ctrl->val);
+ break;
+ default:
+ retval = -EINVAL;
+ break;
+ }
+
+ si476x_core_unlock(radio->core);
+
+ return retval;
+}
+
+static int si476x_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 __g_register(struct file *file, void *fh,
+ struct v4l2_dbg_register *reg)
+{
+ struct si476x_radio *radio = video_drvdata(file);
+
+ if (si476x_core_is_valid_property(radio->core, reg->reg)) {
+ reg->size = 2;
+ reg->val = si476x_core_cmd_get_property(radio->core, reg->reg);
+ return (reg->val < 0) ? reg->val : 0;
+ } else {
+ return -EINVAL;
+ }
+}
+
+static int __s_register(struct file *file, void *fh,
+ struct v4l2_dbg_register *reg)
+{
+ int err;
+ struct si476x_radio *radio = video_drvdata(file);
+
+ if (si476x_core_is_valid_property(radio->core, reg->reg) &&
+ !si476x_core_is_readonly_property(radio->core, reg->reg)) {
+ err = si476x_core_cmd_set_property(radio->core,
+ reg->reg, reg->val);
+ } else {
+ err = -EINVAL;
+ }
+
+ return err;
+}
+
+static int si476x_g_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 = __g_register(file, fh, reg);
+ si476x_core_unlock(radio->core);
+
+ return err;
+}
+
+static int si476x_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 = __s_register(file, fh, reg);
+ si476x_core_unlock(radio->core);
+
+ return err;
+}
+#endif
+
+static long si476x_default(struct file *file, void *fh,
+ bool valid_prio, int cmd, void *arg)
+{
+ long rval;
+ struct si476x_rsq_status_args args = {
+ .primary = false,
+ .rsqack = false,
+ .attune = false,
+ .cancel = false,
+ .stcack = false,
+ };
+ struct si476x_radio *radio = video_drvdata(file);
+
+ si476x_core_lock(radio->core);
+ switch (cmd) {
+ case SI476X_IOC_GET_RSQ_PRIMARY:
+ args.primary = true;
+ case SI476X_IOC_GET_RSQ: /* FALLTHROUG */
+ if (radio->ops->rsq_status)
+ rval = radio->ops->rsq_status(radio->core, &args,
+ (struct si476x_rsq_status_report *) arg);
+ else
+ rval = -ENOTTY;
+ break;
+ case SI476X_IOC_SET_PHDIV_MODE:
+ if (radio->ops->phase_diversity)
+ rval = radio->ops->phase_diversity(radio->core,
+ *((enum si476x_phase_diversity_mode *) arg));
+ else
+ rval = -ENOTTY;
+ break;
+ case SI476X_IOC_GET_PHDIV_STATUS:
+ if (radio->ops->phase_div_status) {
+ rval = radio->ops->phase_div_status(radio->core);
+ if (rval >= 0) {
+ *((int *)arg) = rval;
+ rval = 0;
+ }
+ } else {
+ rval = -ENOTTY;
+ }
+ break;
+ case SI476X_IOC_GET_ACF:
+ if (radio->ops->acf_status)
+ rval = radio->ops->acf_status(radio->core,
+ (struct si476x_acf_status_report *)arg);
+ else
+ rval = -ENOTTY;
+ break;
+ case SI476X_IOC_GET_AGC:
+ if (radio->ops->agc_status)
+ rval = radio->ops->agc_status(radio->core,
+ (struct si476x_agc_status_report *)arg);
+ else
+ rval = -ENOTTY;
+ break;
+ case SI476X_IOC_GET_RDS_BLKCNT:
+ if (radio->ops->rds_blckcnt)
+ rval = radio->ops->rds_blckcnt(radio->core, true,
+ (struct si476x_rds_blockcount_report *)arg);
+ else
+ rval = -ENOTTY;
+ break;
+ default:
+ /* nothing */
+ rval = -ENOTTY;
+ break;
+ }
+
+ si476x_core_unlock(radio->core);
+ return rval;
+}
+
+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_initialize_mode(radio);
+ 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);
+ }
+
+ /* v4l2_device_get(&radio->v4l2dev); */
+
+ 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);
+ /* v4l2_device_put(&radio->v4l2dev); */
+
+ 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 durnig 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_querycap,
+ .vidioc_g_tuner = si476x_g_tuner,
+ .vidioc_s_tuner = si476x_s_tuner,
+
+ .vidioc_g_frequency = si476x_g_frequency,
+ .vidioc_s_frequency = si476x_s_frequency,
+ .vidioc_s_hw_freq_seek = si476x_s_hw_freq_seek,
+ .vidioc_enum_freq_bands = si476x_enum_freq_bands,
+
+ .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+
+ .vidioc_g_chip_ident = si476x_g_chip_ident,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+ .vidioc_g_register = si476x_g_register,
+ .vidioc_s_register = si476x_s_register,
+#endif
+ .vidioc_default = si476x_default,
+};
+
+
+static const struct video_device si476x_viddev_template = {
+ .fops = &si476x_fops,
+ .name = DRIVER_NAME,
+ .release = video_device_release_empty,
+};
+
+
+static int si476x_radio_initialize_mode(struct si476x_radio *radio)
+{
+ 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,
+ };
+
+ static const struct si476x_radio_ops none_ops = {
+ .tune_freq = NULL,
+ .seek_start = NULL,
+ .rsq_status = NULL,
+ .rds_blckcnt = NULL,
+ .phase_diversity = NULL,
+ .phase_div_status = NULL,
+ .acf_status = NULL,
+ .agc_status = NULL,
+ };
+
+ 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,
+ };
+ struct si476x_func_info info;
+ int retval;
+
+ retval = si476x_core_cmd_func_info(radio->core, &info);
+ if (retval < 0)
+ return retval;
+
+ switch (info.func) {
+ case SI476X_FUNC_FM_RECEIVER:
+ radio->ops = &fm_ops;
+ args.freq = v4l2_to_si476x(radio->core,
+ 92 * FREQ_MUL);
+ retval = radio->ops->tune_freq(radio->core, &args);
+ break;
+ case SI476X_FUNC_AM_RECEIVER:
+ radio->ops = &am_ops;
+ 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"); /* FALLTHROUGH */
+ case SI476X_FUNC_WB_RECEIVER: /* FALLTHROUGH */
+ case SI476X_FUNC_BOOTLOADER:
+ radio->ops = &none_ops;
+ break;
+ }
+
+ return retval;
+}
+
+static int __devinit si476x_radio_probe(struct platform_device *pdev)
+{
+ int rval, i;
+ 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);
+
+ switch (radio->core->power_up_parameters.func) {
+ default:
+ case SI476X_FUNC_FM_RECEIVER:
+ radio->rangelow = si476x_bands[SI476X_BAND_FM].rangelow;
+ radio->rangehigh = si476x_bands[SI476X_BAND_FM].rangehigh;
+ break;
+ case SI476X_FUNC_AM_RECEIVER:
+ radio->rangelow = si476x_bands[SI476X_BAND_AM].rangelow;
+ radio->rangehigh = si476x_bands[SI476X_BAND_AM].rangehigh;
+ break;
+ }
+
+ 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));
+ v4l2_ctrl_new_std_menu(&radio->ctrl_handler,
+ &si476x_ctrl_ops,
+ V4L2_CID_POWER_LINE_FREQUENCY,
+ V4L2_CID_POWER_LINE_FREQUENCY_60HZ, 0, 0);
+ for (i = 0; i < ARRAY_SIZE(si476x_ctrls); ++i)
+ v4l2_ctrl_new_custom(&radio->ctrl_handler, &si476x_ctrls[i], NULL);
+
+
+ if (radio->ctrl_handler.error) {
+ rval = radio->ctrl_handler.error;
+ dev_err(&pdev->dev, "Could not initialize controls %d\n", rval);
+ } else {
+ /* register video device */
+ rval = video_register_device(&radio->videodev, VFL_TYPE_RADIO, -1);
+ }
+
+ if (rval) {
+ dev_err(&pdev->dev, "Could not register video device\n");
+ v4l2_ctrl_handler_free(radio->videodev.ctrl_handler);
+
+ return rval;
+ }
+
+ return 0;
+}
+
+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);
+
+ 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@xxxxxxxxxxxxxxxxxxxx>");
+MODULE_DESCRIPTION("Driver for Si4761/64/68 AM/FM Radio MFD Cell");
+MODULE_LICENSE("GPL");
--
1.7.9.5
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