Merge branch 'topic/si476x' into patchwork

* topic/si476x:
  Revert "[media] mfd: Add chip properties handling code for SI476X MFD"
  Revert "[media] mfd: Add the main bulk of core driver for SI476x code"
  Revert "[media] mfd: Add commands abstraction layer for SI476X MFD"
  [media] v4l2: Add a V4L2 driver for SI476X MFD

Documentation/video4linux/si476x.txt

@@ -0,0 +1,187 @@
+SI476x Driver Readme
+------------------------------------------------
+	Copyright (C) 2013 Andrey Smirnov <andrew.smirnov@gmail.com>
+
+TODO for the driver
+------------------------------
+
+- According to the SiLabs' datasheet it is possible to update the
+  firmware of the radio chip in the run-time, thus bringing it to the
+  most recent version. Unfortunately I couldn't find any mentioning of
+  the said firmware update for the old chips that I tested the driver
+  against, so for chips like that the driver only exposes the old
+  functionality.
+
+
+Parameters exposed over debugfs
+-------------------------------
+SI476x allow user to get multiple characteristics that can be very
+useful for EoL testing/RF performance estimation, parameters that have
+very little to do with V4L2 subsystem. Such parameters are exposed via
+debugfs and can be accessed via regular file I/O operations.
+
+The drivers exposes following files:
+
+* /sys/kernel/debug/<device-name>/acf
+  This file contains ACF(Automatically Controlled Features) status
+  information. The contents of the file is binary data of the
+  following layout:
+
+  Offset	| Name		| Description
+  ====================================================================
+  0x00		| blend_int	| Flag, set when stereo separation has
+  		|  		| crossed below the blend threshold
+  --------------------------------------------------------------------
+  0x01		| hblend_int	| Flag, set when HiBlend cutoff
+  		| 		| frequency is lower than threshold
+  --------------------------------------------------------------------
+  0x02		| hicut_int	| Flag, set when HiCut cutoff
+  		| 		| frequency is lower than threshold
+  --------------------------------------------------------------------
+  0x03		| chbw_int	| Flag, set when channel filter
+  		| 		| bandwidth is less than threshold
+  --------------------------------------------------------------------
+  0x04		| softmute_int	| Flag indicating that softmute
+  		| 		| attenuation has increased above
+		|		| softmute threshold
+  --------------------------------------------------------------------
+  0x05		| smute		| 0 - Audio is not soft muted
+  		| 		| 1 - Audio is soft muted
+  --------------------------------------------------------------------
+  0x06		| smattn	| Soft mute attenuation level in dB
+  --------------------------------------------------------------------
+  0x07		| chbw		| Channel filter bandwidth in kHz
+  --------------------------------------------------------------------
+  0x08		| hicut		| HiCut cutoff frequency in units of
+  		| 		| 100Hz
+  --------------------------------------------------------------------
+  0x09		| hiblend	| HiBlend cutoff frequency in units
+  		| 		| of 100 Hz
+  --------------------------------------------------------------------
+  0x10		| pilot		| 0 - Stereo pilot is not present
+  		| 		| 1 - Stereo pilot is present
+  --------------------------------------------------------------------
+  0x11		| stblend	| Stereo blend in %
+  --------------------------------------------------------------------
+
+
+* /sys/kernel/debug/<device-name>/rds_blckcnt
+  This file contains statistics about RDS receptions. It's binary data
+  has the following layout:
+
+  Offset	| Name		| Description
+  ====================================================================
+  0x00		| expected	| Number of expected RDS blocks
+  --------------------------------------------------------------------
+  0x02		| received	| Number of received RDS blocks
+  --------------------------------------------------------------------
+  0x04		| uncorrectable	| Number of uncorrectable RDS blocks
+  --------------------------------------------------------------------
+
+* /sys/kernel/debug/<device-name>/agc
+  This file contains information about parameters pertaining to
+  AGC(Automatic Gain Control)
+
+  The layout is:
+  Offset	| Name		| Description
+  ====================================================================
+  0x00		| mxhi		| 0 - FM Mixer PD high threshold is
+  		| 		| not tripped
+		|		| 1 - FM Mixer PD high threshold is
+		|		| tripped
+  --------------------------------------------------------------------
+  0x01		| mxlo		| ditto for FM Mixer PD low
+  --------------------------------------------------------------------
+  0x02		| lnahi		| ditto for FM LNA PD high
+  --------------------------------------------------------------------
+  0x03		| lnalo		| ditto for FM LNA PD low
+  --------------------------------------------------------------------
+  0x04		| fmagc1	| FMAGC1 attenuator resistance
+  		| 		| (see datasheet for more detail)
+  --------------------------------------------------------------------
+  0x05		| fmagc2	| ditto for FMAGC2
+  --------------------------------------------------------------------
+  0x06		| pgagain	| PGA gain in dB
+  --------------------------------------------------------------------
+  0x07		| fmwblang	| FM/WB LNA Gain in dB
+  --------------------------------------------------------------------
+
+* /sys/kernel/debug/<device-name>/rsq
+  This file contains information about parameters pertaining to
+  RSQ(Received Signal Quality)
+
+  The layout is:
+  Offset	| Name		| Description
+  ====================================================================
+  0x00		| multhint	| 0 - multipath value has not crossed
+  		| 		| the Multipath high threshold
+		|		| 1 - multipath value has crossed
+  		| 		| the Multipath high threshold
+  --------------------------------------------------------------------
+  0x01		| multlint	| ditto for Multipath low threshold
+  --------------------------------------------------------------------
+  0x02		| snrhint	| 0 - received signal's SNR has not
+  		| 		| crossed high threshold
+		|		| 1 - received signal's SNR has
+  		| 		| crossed high threshold
+  --------------------------------------------------------------------
+  0x03		| snrlint	| ditto for low threshold
+  --------------------------------------------------------------------
+  0x04		| rssihint	| ditto for RSSI high threshold
+  --------------------------------------------------------------------
+  0x05		| rssilint	| ditto for RSSI low threshold
+  --------------------------------------------------------------------
+  0x06		| bltf		| Flag indicating if seek command
+  		| 		| reached/wrapped seek band limit
+  --------------------------------------------------------------------
+  0x07		| snr_ready	| Indicates that SNR metrics is ready
+  --------------------------------------------------------------------
+  0x08		| rssiready	| ditto for RSSI metrics
+  --------------------------------------------------------------------
+  0x09		| injside	| 0 - Low-side injection is being used
+  		| 		| 1 - High-side injection is used
+  --------------------------------------------------------------------
+  0x10		| afcrl		| Flag indicating if AFC rails
+  --------------------------------------------------------------------
+  0x11		| valid		| Flag indicating if channel is valid
+  --------------------------------------------------------------------
+  0x12		| readfreq	| Current tuned frequency
+  --------------------------------------------------------------------
+  0x14		| freqoff	| Singed frequency offset in units of
+  		| 		| 2ppm
+  --------------------------------------------------------------------
+  0x15		| rssi		| Signed value of RSSI in dBuV
+  --------------------------------------------------------------------
+  0x16		| snr		| Signed RF SNR in dB
+  --------------------------------------------------------------------
+  0x17		| issi		| Signed Image Strength Signal
+  		| 		| indicator
+  --------------------------------------------------------------------
+  0x18		| lassi		| Signed Low side adjacent Channel
+  		| 		| Strength indicator
+  --------------------------------------------------------------------
+  0x19		| hassi		| ditto fpr High side
+  --------------------------------------------------------------------
+  0x20		| mult		| Multipath indicator
+  --------------------------------------------------------------------
+  0x21		| dev		| Frequency deviation
+  --------------------------------------------------------------------
+  0x24		| assi		| Adjascent channel SSI
+  --------------------------------------------------------------------
+  0x25		| usn		| Ultrasonic noise indicator
+  --------------------------------------------------------------------
+  0x26		| pilotdev	| Pilot deviation in units of 100 Hz
+  --------------------------------------------------------------------
+  0x27		| rdsdev	| ditto for RDS
+  --------------------------------------------------------------------
+  0x28		| assidev	| ditto for ASSI
+  --------------------------------------------------------------------
+  0x29		| strongdev	| Frequency deviation
+  --------------------------------------------------------------------
+  0x30		| rdspi		| RDS PI code
+  --------------------------------------------------------------------
+
+* /sys/kernel/debug/<device-name>/rsq_primary
+  This file contains information about parameters pertaining to
+  RSQ(Received Signal Quality) for primary tuner only. Layout is as
+  the one above.

drivers/media/radio/Kconfig

@@ -18,6 +18,22 @@ config RADIO_SI470X
 
 source "drivers/media/radio/si470x/Kconfig"
 
+config RADIO_SI476X
+	tristate "Silicon Laboratories Si476x I2C FM Radio"
+	depends on I2C && VIDEO_V4L2
+	depends on 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.
+
 config USB_MR800
 	tristate "AverMedia MR 800 USB FM radio support"
 	depends on USB && VIDEO_V4L2

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/

drivers/media/radio/radio-si476x.c

@@ -0,0 +1,1599 @@
+/*
+ * drivers/media/radio/radio-si476x.c -- V4L2 driver for SI476X chips
+ *
+ * Copyright (C) 2012 Innovative Converged Devices(ICD)
+ * Copyright (C) 2013 Andrey Smirnov
+ *
+ * Author: Andrey Smirnov <andrew.smirnov@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+#include <linux/atomic.h>
+#include <linux/videodev2.h>
+#include <linux/mutex.h>
+#include <linux/debugfs.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-device.h>
+
+#include <media/si476x.h>
+#include <linux/mfd/si476x-core.h>
+
+#define FM_FREQ_RANGE_LOW   64000000
+#define FM_FREQ_RANGE_HIGH 108000000
+
+#define AM_FREQ_RANGE_LOW    520000
+#define AM_FREQ_RANGE_HIGH 30000000
+
+#define PWRLINEFLTR (1 << 8)
+
+#define FREQ_MUL (10000000 / 625)
+
+#define SI476X_PHDIV_STATUS_LINK_LOCKED(status) (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;
+}
+
+static int si476x_radio_s_ctrl(struct v4l2_ctrl *ctrl);
+static int si476x_radio_g_volatile_ctrl(struct v4l2_ctrl *ctrl);
+
+enum phase_diversity_modes_idx {
+	SI476X_IDX_PHDIV_DISABLED,
+	SI476X_IDX_PHDIV_PRIMARY_COMBINING,
+	SI476X_IDX_PHDIV_PRIMARY_ANTENNA,
+	SI476X_IDX_PHDIV_SECONDARY_ANTENNA,
+	SI476X_IDX_PHDIV_SECONDARY_COMBINING,
+};
+
+static const char * const phase_diversity_modes[] = {
+	[SI476X_IDX_PHDIV_DISABLED]		= "Disabled",
+	[SI476X_IDX_PHDIV_PRIMARY_COMBINING]	= "Primary with Secondary",
+	[SI476X_IDX_PHDIV_PRIMARY_ANTENNA]	= "Primary Antenna",
+	[SI476X_IDX_PHDIV_SECONDARY_ANTENNA]	= "Secondary Antenna",
+	[SI476X_IDX_PHDIV_SECONDARY_COMBINING]	= "Secondary with Primary",
+};
+
+static inline enum phase_diversity_modes_idx
+si476x_phase_diversity_mode_to_idx(enum si476x_phase_diversity_mode mode)
+{
+	switch (mode) {
+	default:		/* FALLTHROUGH */
+	case SI476X_PHDIV_DISABLED:
+		return SI476X_IDX_PHDIV_DISABLED;
+	case SI476X_PHDIV_PRIMARY_COMBINING:
+		return SI476X_IDX_PHDIV_PRIMARY_COMBINING;
+	case SI476X_PHDIV_PRIMARY_ANTENNA:
+		return SI476X_IDX_PHDIV_PRIMARY_ANTENNA;
+	case SI476X_PHDIV_SECONDARY_ANTENNA:
+		return SI476X_IDX_PHDIV_SECONDARY_ANTENNA;
+	case SI476X_PHDIV_SECONDARY_COMBINING:
+		return SI476X_IDX_PHDIV_SECONDARY_COMBINING;
+	}
+}
+
+static inline enum si476x_phase_diversity_mode
+si476x_phase_diversity_idx_to_mode(enum phase_diversity_modes_idx idx)
+{
+	static const int idx_to_value[] = {
+		[SI476X_IDX_PHDIV_DISABLED]		= SI476X_PHDIV_DISABLED,
+		[SI476X_IDX_PHDIV_PRIMARY_COMBINING]	= SI476X_PHDIV_PRIMARY_COMBINING,
+		[SI476X_IDX_PHDIV_PRIMARY_ANTENNA]	= SI476X_PHDIV_PRIMARY_ANTENNA,
+		[SI476X_IDX_PHDIV_SECONDARY_ANTENNA]	= SI476X_PHDIV_SECONDARY_ANTENNA,
+		[SI476X_IDX_PHDIV_SECONDARY_COMBINING]	= SI476X_PHDIV_SECONDARY_COMBINING,
+	};
+
+	return idx_to_value[idx];
+}
+
+static const struct v4l2_ctrl_ops si476x_ctrl_ops = {
+	.g_volatile_ctrl	= si476x_radio_g_volatile_ctrl,
+	.s_ctrl			= si476x_radio_s_ctrl,
+};
+
+
+enum si476x_ctrl_idx {
+	SI476X_IDX_RSSI_THRESHOLD,
+	SI476X_IDX_SNR_THRESHOLD,
+	SI476X_IDX_MAX_TUNE_ERROR,
+	SI476X_IDX_HARMONICS_COUNT,
+	SI476X_IDX_DIVERSITY_MODE,
+	SI476X_IDX_INTERCHIP_LINK,
+};
+static struct v4l2_ctrl_config si476x_ctrls[] = {
+
+	/**
+	 * SI476X during its station seeking(or tuning) process uses several
+	 * parameters to detrmine if "the station" is valid:
+	 *
+	 *	- Signal's SNR(in dBuV) must be lower than
+	 *	#V4L2_CID_SI476X_SNR_THRESHOLD
+	 *	- Signal's RSSI(in dBuV) must be greater than
+	 *	#V4L2_CID_SI476X_RSSI_THRESHOLD
+	 *	- Signal's frequency deviation(in units of 2ppm) must not be
+	 *	more than #V4L2_CID_SI476X_MAX_TUNE_ERROR
+	 */
+	[SI476X_IDX_RSSI_THRESHOLD] = {
+		.ops	= &si476x_ctrl_ops,
+		.id	= V4L2_CID_SI476X_RSSI_THRESHOLD,
+		.name	= "Valid RSSI Threshold",
+		.type	= V4L2_CTRL_TYPE_INTEGER,
+		.min	= -128,
+		.max	= 127,
+		.step	= 1,
+	},
+	[SI476X_IDX_SNR_THRESHOLD] = {
+		.ops	= &si476x_ctrl_ops,
+		.id	= V4L2_CID_SI476X_SNR_THRESHOLD,
+		.type	= V4L2_CTRL_TYPE_INTEGER,
+		.name	= "Valid SNR Threshold",
+		.min	= -128,
+		.max	= 127,
+		.step	= 1,
+	},
+	[SI476X_IDX_MAX_TUNE_ERROR] = {
+		.ops	= &si476x_ctrl_ops,
+		.id	= V4L2_CID_SI476X_MAX_TUNE_ERROR,
+		.type	= V4L2_CTRL_TYPE_INTEGER,
+		.name	= "Max Tune Errors",
+		.min	= 0,
+		.max	= 126 * 2,
+		.step	= 2,
+	},
+
+	/**
+	 * #V4L2_CID_SI476X_HARMONICS_COUNT -- number of harmonics
+	 * built-in power-line noise supression filter is to reject
+	 * during AM-mode operation.
+	 */
+	[SI476X_IDX_HARMONICS_COUNT] = {
+		.ops	= &si476x_ctrl_ops,
+		.id	= V4L2_CID_SI476X_HARMONICS_COUNT,
+		.type	= V4L2_CTRL_TYPE_INTEGER,
+
+		.name	= "Count of Harmonics to Reject",
+		.min	= 0,
+		.max	= 20,
+		.step	= 1,
+	},
+
+	/**
+	 * #V4L2_CID_SI476X_DIVERSITY_MODE -- configuration which
+	 * two tuners working in diversity mode are to work in.
+	 *
+	 *  - #SI476X_IDX_PHDIV_DISABLED diversity mode disabled
+	 *  - #SI476X_IDX_PHDIV_PRIMARY_COMBINING diversity mode is
+	 *  on, primary tuner's antenna is the main one.
+	 *  - #SI476X_IDX_PHDIV_PRIMARY_ANTENNA diversity mode is
+	 *  off, primary tuner's antenna is the main one.
+	 *  - #SI476X_IDX_PHDIV_SECONDARY_ANTENNA diversity mode is
+	 *  off, secondary tuner's antenna is the main one.
+	 *  - #SI476X_IDX_PHDIV_SECONDARY_COMBINING diversity mode is
+	 *  on, secondary tuner's antenna is the main one.
+	 */
+	[SI476X_IDX_DIVERSITY_MODE] = {
+		.ops	= &si476x_ctrl_ops,
+		.id	= V4L2_CID_SI476X_DIVERSITY_MODE,
+		.type	= V4L2_CTRL_TYPE_MENU,
+		.name	= "Phase Diversity Mode",
+		.qmenu	= phase_diversity_modes,
+		.min	= 0,
+		.max	= ARRAY_SIZE(phase_diversity_modes) - 1,
+	},
+
+	/**
+	 * #V4L2_CID_SI476X_INTERCHIP_LINK -- inter-chip link in
+	 * diversity mode indicator. Allows user to determine if two
+	 * chips working in diversity mode have established a link
+	 * between each other and if the system as a whole uses
+	 * signals from both antennas to receive FM radio.
+	 */
+	[SI476X_IDX_INTERCHIP_LINK] = {
+		.ops	= &si476x_ctrl_ops,
+		.id	= V4L2_CID_SI476X_INTERCHIP_LINK,
+		.type	= V4L2_CTRL_TYPE_BOOLEAN,
+		.flags  = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_VOLATILE,
+		.name	= "Inter-Chip Link",
+		.min	= 0,
+		.max	= 1,
+		.step	= 1,
+	},
+};
+
+struct si476x_radio;
+
+/**
+ * struct si476x_radio_ops - vtable of tuner functions
+ *
+ * This table holds pointers to functions implementing particular
+ * operations depending on the mode in which the tuner chip was
+ * configured to start 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,
+				const struct v4l2_tuner *tuner)
+{
+	struct si476x_radio *radio = video_drvdata(file);
+
+	if (tuner->index != 0)
+		return -EINVAL;
+
+	if (tuner->audmode == V4L2_TUNER_MODE_MONO ||
+	    tuner->audmode == V4L2_TUNER_MODE_STEREO)
+		radio->audmode = tuner->audmode;
+	else
+		radio->audmode = V4L2_TUNER_MODE_STEREO;
+
+	return 0;
+}
+
+static int si476x_radio_init_vtable(struct si476x_radio *radio,
+				    enum si476x_func func)
+{
+	static const struct si476x_radio_ops fm_ops = {
+		.tune_freq		= si476x_core_cmd_fm_tune_freq,
+		.seek_start		= si476x_core_cmd_fm_seek_start,
+		.rsq_status		= si476x_core_cmd_fm_rsq_status,
+		.rds_blckcnt		= si476x_core_cmd_fm_rds_blockcount,
+		.phase_diversity	= si476x_core_cmd_fm_phase_diversity,
+		.phase_div_status	= si476x_core_cmd_fm_phase_div_status,
+		.acf_status		= si476x_core_cmd_fm_acf_status,
+		.agc_status		= si476x_core_cmd_agc_status,
+	};
+
+	static const struct si476x_radio_ops am_ops = {
+		.tune_freq		= si476x_core_cmd_am_tune_freq,
+		.seek_start		= si476x_core_cmd_am_seek_start,
+		.rsq_status		= si476x_core_cmd_am_rsq_status,
+		.rds_blckcnt		= NULL,
+		.phase_diversity	= NULL,
+		.phase_div_status	= NULL,
+		.acf_status		= si476x_core_cmd_am_acf_status,
+		.agc_status		= NULL,
+	};
+
+	switch (func) {
+	case SI476X_FUNC_FM_RECEIVER:
+		radio->ops = &fm_ops;
+		return 0;
+
+	case SI476X_FUNC_AM_RECEIVER:
+		radio->ops = &am_ops;
+		return 0;
+	default:
+		WARN(1, "Unexpected tuner function value\n");
+		return -EINVAL;
+	}
+}
+
+static int si476x_radio_pretune(struct si476x_radio *radio,
+				enum si476x_func func)
+{
+	int retval;
+
+	struct si476x_tune_freq_args args = {
+		.zifsr		= false,
+		.hd		= false,
+		.injside	= SI476X_INJSIDE_AUTO,
+		.tunemode	= SI476X_TM_VALIDATED_NORMAL_TUNE,
+		.smoothmetrics	= SI476X_SM_INITIALIZE_AUDIO,
+		.antcap		= 0,
+	};
+
+	switch (func) {
+	case SI476X_FUNC_FM_RECEIVER:
+		args.freq = v4l2_to_si476x(radio->core,
+					   92 * FREQ_MUL);
+		retval = radio->ops->tune_freq(radio->core, &args);
+		break;
+	case SI476X_FUNC_AM_RECEIVER:
+		args.freq = v4l2_to_si476x(radio->core,
+					   0.6 * FREQ_MUL);
+		retval = radio->ops->tune_freq(radio->core, &args);
+		break;
+	default:
+		WARN(1, "Unexpected tuner function value\n");
+		retval = -EINVAL;
+	}
+
+	return retval;
+}
+static int si476x_radio_do_post_powerup_init(struct si476x_radio *radio,
+					     enum si476x_func func)
+{
+	int err;
+
+	/* regcache_mark_dirty(radio->core->regmap); */
+	err = regcache_sync_region(radio->core->regmap,
+				   SI476X_PROP_DIGITAL_IO_INPUT_SAMPLE_RATE,
+				   SI476X_PROP_DIGITAL_IO_OUTPUT_FORMAT);
+		if (err < 0)
+			return err;
+
+	err = regcache_sync_region(radio->core->regmap,
+				   SI476X_PROP_AUDIO_DEEMPHASIS,
+				   SI476X_PROP_AUDIO_PWR_LINE_FILTER);
+	if (err < 0)
+		return err;
+
+	err = regcache_sync_region(radio->core->regmap,
+				   SI476X_PROP_INT_CTL_ENABLE,
+				   SI476X_PROP_INT_CTL_ENABLE);
+	if (err < 0)
+		return err;
+
+	/*
+	 * Is there any point in restoring SNR and the like
+	 * when switching between AM/FM?
+	 */
+	err = regcache_sync_region(radio->core->regmap,
+				   SI476X_PROP_VALID_MAX_TUNE_ERROR,
+				   SI476X_PROP_VALID_MAX_TUNE_ERROR);
+	if (err < 0)
+		return err;
+
+	err = regcache_sync_region(radio->core->regmap,
+				   SI476X_PROP_VALID_SNR_THRESHOLD,
+				   SI476X_PROP_VALID_RSSI_THRESHOLD);
+	if (err < 0)
+		return err;
+
+	if (func == SI476X_FUNC_FM_RECEIVER) {
+		if (si476x_core_has_diversity(radio->core)) {
+			err = si476x_core_cmd_fm_phase_diversity(radio->core,
+								 radio->core->diversity_mode);
+			if (err < 0)
+				return err;
+		}
+
+		err = regcache_sync_region(radio->core->regmap,
+					   SI476X_PROP_FM_RDS_INTERRUPT_SOURCE,
+					   SI476X_PROP_FM_RDS_CONFIG);
+		if (err < 0)
+			return err;
+	}
+
+	return si476x_radio_init_vtable(radio, func);
+
+}
+
+static int si476x_radio_change_func(struct si476x_radio *radio,
+				    enum si476x_func func)
+{
+	int err;
+	bool soft;
+	/*
+	 * Since power/up down is a very time consuming operation,
+	 * try to avoid doing it if the requested mode matches the one
+	 * the tuner is in
+	 */
+	if (func == radio->core->power_up_parameters.func)
+		return 0;
+
+	soft = true;
+	err = si476x_core_stop(radio->core, soft);
+	if (err < 0) {
+		/*
+		 * OK, if the chip does not want to play nice let's
+		 * try to reset it in more brutal way
+		 */
+		soft = false;
+		err = si476x_core_stop(radio->core, soft);
+		if (err < 0)
+			return err;
+	}
+	/*
+	  Set the desired radio tuner function
+	 */
+	radio->core->power_up_parameters.func = func;
+
+	err = si476x_core_start(radio->core, soft);
+	if (err < 0)
+		return err;
+
+	/*
+	 * No need to do the rest of manipulations for the bootlader
+	 * mode
+	 */
+	if (func != SI476X_FUNC_FM_RECEIVER &&
+	    func != SI476X_FUNC_AM_RECEIVER)
+		return err;
+
+	return si476x_radio_do_post_powerup_init(radio, func);
+}
+
+static int si476x_radio_g_frequency(struct file *file, void *priv,
+			      struct v4l2_frequency *f)
+{
+	int err;
+	struct si476x_radio *radio = video_drvdata(file);
+
+	if (f->tuner != 0 ||
+	    f->type  != V4L2_TUNER_RADIO)
+		return -EINVAL;
+
+	si476x_core_lock(radio->core);
+
+	if (radio->ops->rsq_status) {
+		struct si476x_rsq_status_report report;
+		struct si476x_rsq_status_args   args = {
+			.primary	= false,
+			.rsqack		= false,
+			.attune		= true,
+			.cancel		= false,
+			.stcack		= false,
+		};
+
+		err = radio->ops->rsq_status(radio->core, &args, &report);
+		if (!err)
+			f->frequency = si476x_to_v4l2(radio->core,
+						      report.readfreq);
+	} else {
+		err = -EINVAL;
+	}
+
+	si476x_core_unlock(radio->core);
+
+	return err;
+}
+
+static int si476x_radio_s_frequency(struct file *file, void *priv,
+				    const struct v4l2_frequency *f)
+{
+	int err;
+	u32 freq = f->frequency;
+	struct si476x_tune_freq_args args;
+	struct si476x_radio *radio = video_drvdata(file);
+
+	const u32 midrange = (si476x_bands[SI476X_BAND_AM].rangehigh +
+			      si476x_bands[SI476X_BAND_FM].rangelow) / 2;
+	const int band = (freq > midrange) ?
+		SI476X_BAND_FM : SI476X_BAND_AM;
+	const enum si476x_func func = (band == SI476X_BAND_AM) ?
+		SI476X_FUNC_AM_RECEIVER : SI476X_FUNC_FM_RECEIVER;
+
+	if (f->tuner != 0 ||
+	    f->type  != V4L2_TUNER_RADIO)
+		return -EINVAL;
+
+	si476x_core_lock(radio->core);
+
+	freq = clamp(freq,
+		     si476x_bands[band].rangelow,
+		     si476x_bands[band].rangehigh);
+
+	if (si476x_radio_freq_is_inside_of_the_band(freq,
+						    SI476X_BAND_AM) &&
+	    (!si476x_core_has_am(radio->core) ||
+	     si476x_core_is_a_secondary_tuner(radio->core))) {
+		err = -EINVAL;
+		goto unlock;
+	}
+
+	err = si476x_radio_change_func(radio, func);
+	if (err < 0)
+		goto unlock;
+
+	args.zifsr		= false;
+	args.hd			= false;
+	args.injside		= SI476X_INJSIDE_AUTO;
+	args.freq		= v4l2_to_si476x(radio->core, freq);
+	args.tunemode		= SI476X_TM_VALIDATED_NORMAL_TUNE;
+	args.smoothmetrics	= SI476X_SM_INITIALIZE_AUDIO;
+	args.antcap		= 0;
+
+	err = radio->ops->tune_freq(radio->core, &args);
+
+unlock:
+	si476x_core_unlock(radio->core);
+	return err;
+}
+
+static int si476x_radio_s_hw_freq_seek(struct file *file, void *priv,
+				       const struct v4l2_hw_freq_seek *seek)
+{
+	int err;
+	enum si476x_func func;
+	u32 rangelow, 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 V4L2_CID_SI476X_INTERCHIP_LINK:
+		if (si476x_core_has_diversity(radio->core)) {
+			if (radio->ops->phase_diversity) {
+				retval = radio->ops->phase_div_status(radio->core);
+				if (retval < 0)
+					break;
+
+				ctrl->val = !!SI476X_PHDIV_STATUS_LINK_LOCKED(retval);
+				retval = 0;
+				break;
+			} else {
+				retval = -ENOTTY;
+				break;
+			}
+		}
+		retval = -EINVAL;
+		break;
+	default:
+		retval = -EINVAL;
+		break;
+	}
+	si476x_core_unlock(radio->core);
+	return retval;
+
+}
+
+static int si476x_radio_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+	int retval;
+	enum si476x_phase_diversity_mode mode;
+	struct si476x_radio *radio = v4l2_ctrl_handler_to_radio(ctrl->handler);
+
+	si476x_core_lock(radio->core);
+
+	switch (ctrl->id) {
+	case V4L2_CID_SI476X_HARMONICS_COUNT:
+		retval = regmap_update_bits(radio->core->regmap,
+					    SI476X_PROP_AUDIO_PWR_LINE_FILTER,
+					    SI476X_PROP_PWR_HARMONICS_MASK,
+					    ctrl->val);
+		break;
+	case V4L2_CID_POWER_LINE_FREQUENCY:
+		switch (ctrl->val) {
+		case V4L2_CID_POWER_LINE_FREQUENCY_DISABLED:
+			retval = regmap_update_bits(radio->core->regmap,
+						    SI476X_PROP_AUDIO_PWR_LINE_FILTER,
+						    SI476X_PROP_PWR_ENABLE_MASK,
+						    0);
+			break;
+		case V4L2_CID_POWER_LINE_FREQUENCY_50HZ:
+			retval = regmap_update_bits(radio->core->regmap,
+						    SI476X_PROP_AUDIO_PWR_LINE_FILTER,
+						    SI476X_PROP_PWR_GRID_MASK,
+						    SI476X_PROP_PWR_GRID_50HZ);
+			break;
+		case V4L2_CID_POWER_LINE_FREQUENCY_60HZ:
+			retval = regmap_update_bits(radio->core->regmap,
+						    SI476X_PROP_AUDIO_PWR_LINE_FILTER,
+						    SI476X_PROP_PWR_GRID_MASK,
+						    SI476X_PROP_PWR_GRID_60HZ);
+			break;
+		default:
+			retval = -EINVAL;
+			break;
+		}
+		break;
+	case V4L2_CID_SI476X_RSSI_THRESHOLD:
+		retval = regmap_write(radio->core->regmap,
+				      SI476X_PROP_VALID_RSSI_THRESHOLD,
+				      ctrl->val);
+		break;
+	case V4L2_CID_SI476X_SNR_THRESHOLD:
+		retval = regmap_write(radio->core->regmap,
+				      SI476X_PROP_VALID_SNR_THRESHOLD,
+				      ctrl->val);
+		break;
+	case V4L2_CID_SI476X_MAX_TUNE_ERROR:
+		retval = regmap_write(radio->core->regmap,
+				      SI476X_PROP_VALID_MAX_TUNE_ERROR,
+				      ctrl->val);
+		break;
+	case V4L2_CID_RDS_RECEPTION:
+		/*
+		 * It looks like RDS related properties are
+		 * 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 V4L2_CID_TUNE_DEEMPHASIS:
+		retval = regmap_write(radio->core->regmap,
+				      SI476X_PROP_AUDIO_DEEMPHASIS,
+				      ctrl->val);
+		break;
+
+	case V4L2_CID_SI476X_DIVERSITY_MODE:
+		mode = si476x_phase_diversity_idx_to_mode(ctrl->val);
+
+		if (mode == radio->core->diversity_mode) {
+			retval = 0;
+			break;
+		}
+
+		if (si476x_core_is_in_am_receiver_mode(radio->core)) {
+			/*
+			 * Diversity cannot be configured while tuner
+			 * is in AM mode so save the changes and carry on.
+			 */
+			radio->core->diversity_mode = mode;
+			retval = 0;
+		} else {
+			retval = radio->ops->phase_diversity(radio->core, mode);
+			if (!retval)
+				radio->core->diversity_mode = mode;
+		}
+		break;
+
+	default:
+		retval = -EINVAL;
+		break;
+	}
+
+	si476x_core_unlock(radio->core);
+
+	return retval;
+}
+
+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,
+				   const struct v4l2_dbg_register *reg)
+{
+
+	int err;
+	struct si476x_radio *radio = video_drvdata(file);
+
+	si476x_core_lock(radio->core);
+	err = regmap_write(radio->core->regmap,
+			   (unsigned int)reg->reg,
+			   (unsigned int)reg->val);
+	si476x_core_unlock(radio->core);
+
+	return err;
+}
+#endif
+
+static int si476x_radio_fops_open(struct file *file)
+{
+	struct si476x_radio *radio = video_drvdata(file);
+	int err;
+
+	err = v4l2_fh_open(file);
+	if (err)
+		return err;
+
+	if (v4l2_fh_is_singular_file(file)) {
+		si476x_core_lock(radio->core);
+		err = si476x_core_set_power_state(radio->core,
+						  SI476X_POWER_UP_FULL);
+		if (err < 0)
+			goto done;
+
+		err = si476x_radio_do_post_powerup_init(radio,
+							radio->core->power_up_parameters.func);
+		if (err < 0)
+			goto power_down;
+
+		err = si476x_radio_pretune(radio,
+					   radio->core->power_up_parameters.func);
+		if (err < 0)
+			goto power_down;
+
+		si476x_core_unlock(radio->core);
+		/*Must be done after si476x_core_unlock to prevent a deadlock*/
+		v4l2_ctrl_handler_setup(&radio->ctrl_handler);
+	}
+
+	return err;
+
+power_down:
+	si476x_core_set_power_state(radio->core,
+				    SI476X_POWER_DOWN);
+done:
+	si476x_core_unlock(radio->core);
+	v4l2_fh_release(file);
+
+	return err;
+}
+
+static int si476x_radio_fops_release(struct file *file)
+{
+	int err;
+	struct si476x_radio *radio = video_drvdata(file);
+
+	if (v4l2_fh_is_singular_file(file) &&
+	    atomic_read(&radio->core->is_alive))
+		si476x_core_set_power_state(radio->core,
+					    SI476X_POWER_DOWN);
+
+	err = v4l2_fh_release(file);
+
+	return err;
+}
+
+static ssize_t si476x_radio_fops_read(struct file *file, char __user *buf,
+				      size_t count, loff_t *ppos)
+{
+	ssize_t      rval;
+	size_t       fifo_len;
+	unsigned int copied;
+
+	struct si476x_radio *radio = video_drvdata(file);
+
+	/* block if no new data available */
+	if (kfifo_is_empty(&radio->core->rds_fifo)) {
+		if (file->f_flags & O_NONBLOCK)
+			return -EWOULDBLOCK;
+
+		rval = wait_event_interruptible(radio->core->rds_read_queue,
+						(!kfifo_is_empty(&radio->core->rds_fifo) ||
+						 !atomic_read(&radio->core->is_alive)));
+		if (rval < 0)
+			return -EINTR;
+
+		if (!atomic_read(&radio->core->is_alive))
+			return -ENODEV;
+	}
+
+	fifo_len = kfifo_len(&radio->core->rds_fifo);
+
+	if (kfifo_to_user(&radio->core->rds_fifo, buf,
+			  min(fifo_len, count),
+			  &copied) != 0) {
+		dev_warn(&radio->videodev.dev,
+			 "Error during FIFO to userspace copy\n");
+		rval = -EIO;
+	} else {
+		rval = (ssize_t)copied;
+	}
+
+	return rval;
+}
+
+static 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);
+	unsigned 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 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 si476x_radio_add_new_custom(struct si476x_radio *radio,
+				       enum si476x_ctrl_idx idx)
+{
+	int rval;
+	struct v4l2_ctrl *ctrl;
+
+	ctrl = v4l2_ctrl_new_custom(&radio->ctrl_handler,
+				    &si476x_ctrls[idx],
+				    NULL);
+	rval = radio->ctrl_handler.error;
+	if (ctrl == NULL && rval)
+		dev_err(radio->v4l2dev.dev,
+			"Could not initialize '%s' control %d\n",
+			si476x_ctrls[idx].name, rval);
+
+	return rval;
+}
+
+static int si476x_radio_probe(struct platform_device *pdev)
+{
+	int rval;
+	struct si476x_radio *radio;
+	struct v4l2_ctrl *ctrl;
+
+	static atomic_t instance = ATOMIC_INIT(0);
+
+	radio = devm_kzalloc(&pdev->dev, sizeof(*radio), GFP_KERNEL);
+	if (!radio)
+		return -ENOMEM;
+
+	radio->core = i2c_mfd_cell_to_core(&pdev->dev);
+
+	v4l2_device_set_name(&radio->v4l2dev, DRIVER_NAME, &instance);
+
+	rval = v4l2_device_register(&pdev->dev, &radio->v4l2dev);
+	if (rval) {
+		dev_err(&pdev->dev, "Cannot register v4l2_device.\n");
+		return rval;
+	}
+
+	memcpy(&radio->videodev, &si476x_viddev_template,
+	       sizeof(struct video_device));
+
+	radio->videodev.v4l2_dev  = &radio->v4l2dev;
+	radio->videodev.ioctl_ops = &si4761_ioctl_ops;
+
+	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)) {
+		ctrl = v4l2_ctrl_new_std_menu(&radio->ctrl_handler,
+					      &si476x_ctrl_ops,
+					      V4L2_CID_POWER_LINE_FREQUENCY,
+					      V4L2_CID_POWER_LINE_FREQUENCY_60HZ,
+					      0, 0);
+		rval = radio->ctrl_handler.error;
+		if (ctrl == NULL && rval) {
+			dev_err(&pdev->dev, "Could not initialize V4L2_CID_POWER_LINE_FREQUENCY control %d\n",
+				rval);
+			goto exit;
+		}
+
+		rval = si476x_radio_add_new_custom(radio,
+						   SI476X_IDX_HARMONICS_COUNT);
+		if (rval < 0)
+			goto exit;
+	}
+
+	rval = si476x_radio_add_new_custom(radio, SI476X_IDX_RSSI_THRESHOLD);
+	if (rval < 0)
+		goto exit;
+
+	rval = si476x_radio_add_new_custom(radio, SI476X_IDX_SNR_THRESHOLD);
+	if (rval < 0)
+		goto exit;
+
+	rval = si476x_radio_add_new_custom(radio, SI476X_IDX_MAX_TUNE_ERROR);
+	if (rval < 0)
+		goto exit;
+
+	ctrl = v4l2_ctrl_new_std_menu(&radio->ctrl_handler,
+				      &si476x_ctrl_ops,
+				      V4L2_CID_TUNE_DEEMPHASIS,
+				      V4L2_DEEMPHASIS_75_uS, 0, 0);
+	rval = radio->ctrl_handler.error;
+	if (ctrl == NULL && rval) {
+		dev_err(&pdev->dev, "Could not initialize V4L2_CID_TUNE_DEEMPHASIS control %d\n",
+			rval);
+		goto exit;
+	}
+
+	ctrl = v4l2_ctrl_new_std(&radio->ctrl_handler, &si476x_ctrl_ops,
+				 V4L2_CID_RDS_RECEPTION,
+				 0, 1, 1, 1);
+	rval = radio->ctrl_handler.error;
+	if (ctrl == NULL && rval) {
+		dev_err(&pdev->dev, "Could not initialize V4L2_CID_RDS_RECEPTION control %d\n",
+			rval);
+		goto exit;
+	}
+
+	if (si476x_core_has_diversity(radio->core)) {
+		si476x_ctrls[SI476X_IDX_DIVERSITY_MODE].def =
+			si476x_phase_diversity_mode_to_idx(radio->core->diversity_mode);
+		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 = {
+	.driver		= {
+		.name	= DRIVER_NAME,
+		.owner	= THIS_MODULE,
+	},
+	.probe		= si476x_radio_probe,
+	.remove		= si476x_radio_remove,
+};
+module_platform_driver(si476x_radio_driver);
+
+MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>");
+MODULE_DESCRIPTION("Driver for Si4761/64/68 AM/FM Radio MFD Cell");
+MODULE_LICENSE("GPL");

drivers/mfd/si476x-cmd.c

@@ -1,1554 +0,0 @@
-/*
- * drivers/mfd/si476x-cmd.c -- Subroutines implementing command
- * protocol of si476x series of chips
- *
- * Copyright (C) 2012 Innovative Converged Devices(ICD)
- * Copyright (C) 2013 Andrey Smirnov
- *
- * Author: Andrey Smirnov <andrew.smirnov@gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- */
-
-#include <linux/module.h>
-#include <linux/completion.h>
-#include <linux/delay.h>
-#include <linux/atomic.h>
-#include <linux/i2c.h>
-#include <linux/device.h>
-#include <linux/gpio.h>
-#include <linux/videodev2.h>
-
-#include <media/si476x.h>
-#include <linux/mfd/si476x-core.h>
-
-#define msb(x)                  ((u8)((u16) x >> 8))
-#define lsb(x)                  ((u8)((u16) x &  0x00FF))
-
-
-
-#define CMD_POWER_UP				0x01
-#define CMD_POWER_UP_A10_NRESP			1
-#define CMD_POWER_UP_A10_NARGS			5
-
-#define CMD_POWER_UP_A20_NRESP			1
-#define CMD_POWER_UP_A20_NARGS			5
-
-#define POWER_UP_DELAY_MS			110
-
-#define CMD_POWER_DOWN				0x11
-#define CMD_POWER_DOWN_A10_NRESP		1
-
-#define CMD_POWER_DOWN_A20_NRESP		1
-#define CMD_POWER_DOWN_A20_NARGS		1
-
-#define CMD_FUNC_INFO				0x12
-#define CMD_FUNC_INFO_NRESP			7
-
-#define CMD_SET_PROPERTY			0x13
-#define CMD_SET_PROPERTY_NARGS			5
-#define CMD_SET_PROPERTY_NRESP			1
-
-#define CMD_GET_PROPERTY			0x14
-#define CMD_GET_PROPERTY_NARGS			3
-#define CMD_GET_PROPERTY_NRESP			4
-
-#define CMD_AGC_STATUS				0x17
-#define CMD_AGC_STATUS_NRESP_A10		2
-#define CMD_AGC_STATUS_NRESP_A20                6
-
-#define PIN_CFG_BYTE(x) (0x7F & (x))
-#define CMD_DIG_AUDIO_PIN_CFG			0x18
-#define CMD_DIG_AUDIO_PIN_CFG_NARGS		4
-#define CMD_DIG_AUDIO_PIN_CFG_NRESP		5
-
-#define CMD_ZIF_PIN_CFG				0x19
-#define CMD_ZIF_PIN_CFG_NARGS			4
-#define CMD_ZIF_PIN_CFG_NRESP			5
-
-#define CMD_IC_LINK_GPO_CTL_PIN_CFG		0x1A
-#define CMD_IC_LINK_GPO_CTL_PIN_CFG_NARGS	4
-#define CMD_IC_LINK_GPO_CTL_PIN_CFG_NRESP	5
-
-#define CMD_ANA_AUDIO_PIN_CFG			0x1B
-#define CMD_ANA_AUDIO_PIN_CFG_NARGS		1
-#define CMD_ANA_AUDIO_PIN_CFG_NRESP		2
-
-#define CMD_INTB_PIN_CFG			0x1C
-#define CMD_INTB_PIN_CFG_NARGS			2
-#define CMD_INTB_PIN_CFG_A10_NRESP		6
-#define CMD_INTB_PIN_CFG_A20_NRESP		3
-
-#define CMD_FM_TUNE_FREQ			0x30
-#define CMD_FM_TUNE_FREQ_A10_NARGS		5
-#define CMD_FM_TUNE_FREQ_A20_NARGS		3
-#define CMD_FM_TUNE_FREQ_NRESP			1
-
-#define CMD_FM_RSQ_STATUS			0x32
-
-#define CMD_FM_RSQ_STATUS_A10_NARGS		1
-#define CMD_FM_RSQ_STATUS_A10_NRESP		17
-#define CMD_FM_RSQ_STATUS_A30_NARGS		1
-#define CMD_FM_RSQ_STATUS_A30_NRESP		23
-
-
-#define CMD_FM_SEEK_START			0x31
-#define CMD_FM_SEEK_START_NARGS			1
-#define CMD_FM_SEEK_START_NRESP			1
-
-#define CMD_FM_RDS_STATUS			0x36
-#define CMD_FM_RDS_STATUS_NARGS			1
-#define CMD_FM_RDS_STATUS_NRESP			16
-
-#define CMD_FM_RDS_BLOCKCOUNT			0x37
-#define CMD_FM_RDS_BLOCKCOUNT_NARGS		1
-#define CMD_FM_RDS_BLOCKCOUNT_NRESP		8
-
-#define CMD_FM_PHASE_DIVERSITY			0x38
-#define CMD_FM_PHASE_DIVERSITY_NARGS		1
-#define CMD_FM_PHASE_DIVERSITY_NRESP		1
-
-#define CMD_FM_PHASE_DIV_STATUS			0x39
-#define CMD_FM_PHASE_DIV_STATUS_NRESP		2
-
-#define CMD_AM_TUNE_FREQ			0x40
-#define CMD_AM_TUNE_FREQ_NARGS			3
-#define CMD_AM_TUNE_FREQ_NRESP			1
-
-#define CMD_AM_RSQ_STATUS			0x42
-#define CMD_AM_RSQ_STATUS_NARGS			1
-#define CMD_AM_RSQ_STATUS_NRESP			13
-
-#define CMD_AM_SEEK_START			0x41
-#define CMD_AM_SEEK_START_NARGS			1
-#define CMD_AM_SEEK_START_NRESP			1
-
-
-#define CMD_AM_ACF_STATUS			0x45
-#define CMD_AM_ACF_STATUS_NRESP			6
-#define CMD_AM_ACF_STATUS_NARGS			1
-
-#define CMD_FM_ACF_STATUS			0x35
-#define CMD_FM_ACF_STATUS_NRESP			8
-#define CMD_FM_ACF_STATUS_NARGS			1
-
-#define CMD_MAX_ARGS_COUNT			(10)
-
-
-enum si476x_acf_status_report_bits {
-	SI476X_ACF_BLEND_INT	= (1 << 4),
-	SI476X_ACF_HIBLEND_INT	= (1 << 3),
-	SI476X_ACF_HICUT_INT	= (1 << 2),
-	SI476X_ACF_CHBW_INT	= (1 << 1),
-	SI476X_ACF_SOFTMUTE_INT	= (1 << 0),
-
-	SI476X_ACF_SMUTE	= (1 << 0),
-	SI476X_ACF_SMATTN	= 0b11111,
-	SI476X_ACF_PILOT	= (1 << 7),
-	SI476X_ACF_STBLEND	= ~SI476X_ACF_PILOT,
-};
-
-enum si476x_agc_status_report_bits {
-	SI476X_AGC_MXHI		= (1 << 5),
-	SI476X_AGC_MXLO		= (1 << 4),
-	SI476X_AGC_LNAHI	= (1 << 3),
-	SI476X_AGC_LNALO	= (1 << 2),
-};
-
-enum si476x_errors {
-	SI476X_ERR_BAD_COMMAND		= 0x10,
-	SI476X_ERR_BAD_ARG1		= 0x11,
-	SI476X_ERR_BAD_ARG2		= 0x12,
-	SI476X_ERR_BAD_ARG3		= 0x13,
-	SI476X_ERR_BAD_ARG4		= 0x14,
-	SI476X_ERR_BUSY			= 0x18,
-	SI476X_ERR_BAD_INTERNAL_MEMORY  = 0x20,
-	SI476X_ERR_BAD_PATCH		= 0x30,
-	SI476X_ERR_BAD_BOOT_MODE	= 0x31,
-	SI476X_ERR_BAD_PROPERTY		= 0x40,
-};
-
-static int si476x_core_parse_and_nag_about_error(struct si476x_core *core)
-{
-	int err;
-	char *cause;
-	u8 buffer[2];
-
-	if (core->revision != SI476X_REVISION_A10) {
-		err = si476x_core_i2c_xfer(core, SI476X_I2C_RECV,
-					   buffer, sizeof(buffer));
-		if (err == sizeof(buffer)) {
-			switch (buffer[1]) {
-			case SI476X_ERR_BAD_COMMAND:
-				cause = "Bad command";
-				err = -EINVAL;
-				break;
-			case SI476X_ERR_BAD_ARG1:
-				cause = "Bad argument #1";
-				err = -EINVAL;
-				break;
-			case SI476X_ERR_BAD_ARG2:
-				cause = "Bad argument #2";
-				err = -EINVAL;
-				break;
-			case SI476X_ERR_BAD_ARG3:
-				cause = "Bad argument #3";
-				err = -EINVAL;
-				break;
-			case SI476X_ERR_BAD_ARG4:
-				cause = "Bad argument #4";
-				err = -EINVAL;
-				break;
-			case SI476X_ERR_BUSY:
-				cause = "Chip is busy";
-				err = -EBUSY;
-				break;
-			case SI476X_ERR_BAD_INTERNAL_MEMORY:
-				cause = "Bad internal memory";
-				err = -EIO;
-				break;
-			case SI476X_ERR_BAD_PATCH:
-				cause = "Bad patch";
-				err = -EINVAL;
-				break;
-			case SI476X_ERR_BAD_BOOT_MODE:
-				cause = "Bad boot mode";
-				err = -EINVAL;
-				break;
-			case SI476X_ERR_BAD_PROPERTY:
-				cause = "Bad property";
-				err = -EINVAL;
-				break;
-			default:
-				cause = "Unknown";
-				err = -EIO;
-			}
-
-			dev_err(&core->client->dev,
-				"[Chip error status]: %s\n", cause);
-		} else {
-			dev_err(&core->client->dev,
-				"Failed to fetch error code\n");
-			err = (err >= 0) ? -EIO : err;
-		}
-	} else {
-		err = -EIO;
-	}
-
-	return err;
-}
-
-/**
- * si476x_core_send_command() - sends a command to si476x and waits its
- * response
- * @core:    si476x_device structure for the device we are
- *            communicating with
- * @command:  command id
- * @args:     command arguments we are sending
- * @argn:     actual size of @args
- * @response: buffer to place the expected response from the device
- * @respn:    actual size of @response
- * @usecs:    amount of time to wait before reading the response (in
- *            usecs)
- *
- * Function returns 0 on succsess and negative error code on
- * failure
- */
-static int si476x_core_send_command(struct si476x_core *core,
-				    const u8 command,
-				    const u8 args[],
-				    const int argn,
-				    u8 resp[],
-				    const int respn,
-				    const int usecs)
-{
-	struct i2c_client *client = core->client;
-	int err;
-	u8  data[CMD_MAX_ARGS_COUNT + 1];
-
-	if (argn > CMD_MAX_ARGS_COUNT) {
-		err = -ENOMEM;
-		goto exit;
-	}
-
-	if (!client->adapter) {
-		err = -ENODEV;
-		goto exit;
-	}
-
-	/* First send the command and its arguments */
-	data[0] = command;
-	memcpy(&data[1], args, argn);
-	dev_dbg(&client->dev, "Command:\n %*ph\n", argn + 1, data);
-
-	err = si476x_core_i2c_xfer(core, SI476X_I2C_SEND,
-				   (char *) data, argn + 1);
-	if (err != argn + 1) {
-		dev_err(&core->client->dev,
-			"Error while sending command 0x%02x\n",
-			command);
-		err = (err >= 0) ? -EIO : err;
-		goto exit;
-	}
-	/* Set CTS to zero only after the command is send to avoid
-	 * possible racing conditions when working in polling mode */
-	atomic_set(&core->cts, 0);
-
-	/* if (unlikely(command == CMD_POWER_DOWN) */
-	if (!wait_event_timeout(core->command,
-				atomic_read(&core->cts),
-				usecs_to_jiffies(usecs) + 1))
-		dev_warn(&core->client->dev,
-			 "(%s) [CMD 0x%02x] Answer timeout.\n",
-			 __func__, command);
-
-	/*
-	  When working in polling mode, for some reason the tuner will
-	  report CTS bit as being set in the first status byte read,
-	  but all the consequtive ones will return zeros until the
-	  tuner is actually completed the POWER_UP command. To
-	  workaround that we wait for second CTS to be reported
-	 */
-	if (unlikely(!core->client->irq && command == CMD_POWER_UP)) {
-		if (!wait_event_timeout(core->command,
-					atomic_read(&core->cts),
-					usecs_to_jiffies(usecs) + 1))
-			dev_warn(&core->client->dev,
-				 "(%s) Power up took too much time.\n",
-				 __func__);
-	}
-
-	/* Then get the response */
-	err = si476x_core_i2c_xfer(core, SI476X_I2C_RECV, resp, respn);
-	if (err != respn) {
-		dev_err(&core->client->dev,
-			"Error while reading response for command 0x%02x\n",
-			command);
-		err = (err >= 0) ? -EIO : err;
-		goto exit;
-	}
-	dev_dbg(&client->dev, "Response:\n %*ph\n", respn, resp);
-
-	err = 0;
-
-	if (resp[0] & SI476X_ERR) {
-		dev_err(&core->client->dev,
-			"[CMD 0x%02x] Chip set error flag\n", command);
-		err = si476x_core_parse_and_nag_about_error(core);
-		goto exit;
-	}
-
-	if (!(resp[0] & SI476X_CTS))
-		err = -EBUSY;
-exit:
-	return err;
-}
-
-static int si476x_cmd_clear_stc(struct si476x_core *core)
-{
-	int err;
-	struct si476x_rsq_status_args args = {
-		.primary	= false,
-		.rsqack		= false,
-		.attune		= false,
-		.cancel		= false,
-		.stcack		= true,
-	};
-
-	switch (core->power_up_parameters.func) {
-	case SI476X_FUNC_FM_RECEIVER:
-		err = si476x_core_cmd_fm_rsq_status(core, &args, NULL);
-		break;
-	case SI476X_FUNC_AM_RECEIVER:
-		err = si476x_core_cmd_am_rsq_status(core, &args, NULL);
-		break;
-	default:
-		err = -EINVAL;
-	}
-
-	return err;
-}
-
-static int si476x_cmd_tune_seek_freq(struct si476x_core *core,
-				     uint8_t cmd,
-				     const uint8_t args[], size_t argn,
-				     uint8_t *resp, size_t respn)
-{
-	int err;
-
-
-	atomic_set(&core->stc, 0);
-	err = si476x_core_send_command(core, cmd, args, argn, resp, respn,
-				       SI476X_TIMEOUT_TUNE);
-	if (!err) {
-		wait_event_killable(core->tuning,
-				    atomic_read(&core->stc));
-		si476x_cmd_clear_stc(core);
-	}
-
-	return err;
-}
-
-/**
- * si476x_cmd_func_info() - send 'FUNC_INFO' command to the device
- * @core: device to send the command to
- * @info:  struct si476x_func_info to fill all the information
- *         returned by the command
- *
- * The command requests the firmware and patch version for currently
- * loaded firmware (dependent on the function of the device FM/AM/WB)
- *
- * Function returns 0 on succsess and negative error code on
- * failure
- */
-int si476x_core_cmd_func_info(struct si476x_core *core,
-			      struct si476x_func_info *info)
-{
-	int err;
-	u8  resp[CMD_FUNC_INFO_NRESP];
-
-	err = si476x_core_send_command(core, CMD_FUNC_INFO,
-				       NULL, 0,
-				       resp, ARRAY_SIZE(resp),
-				       SI476X_DEFAULT_TIMEOUT);
-
-	info->firmware.major    = resp[1];
-	info->firmware.minor[0] = resp[2];
-	info->firmware.minor[1] = resp[3];
-
-	info->patch_id = ((u16) resp[4] << 8) | resp[5];
-	info->func     = resp[6];
-
-	return err;
-}
-EXPORT_SYMBOL_GPL(si476x_core_cmd_func_info);
-
-/**
- * si476x_cmd_set_property() - send 'SET_PROPERTY' command to the device
- * @core:    device to send the command to
- * @property: property address
- * @value:    property value
- *
- * Function returns 0 on succsess and negative error code on
- * failure
- */
-int si476x_core_cmd_set_property(struct si476x_core *core,
-				 u16 property, u16 value)
-{
-	u8       resp[CMD_SET_PROPERTY_NRESP];
-	const u8 args[CMD_SET_PROPERTY_NARGS] = {
-		0x00,
-		msb(property),
-		lsb(property),
-		msb(value),
-		lsb(value),
-	};
-
-	return si476x_core_send_command(core, CMD_SET_PROPERTY,
-					args, ARRAY_SIZE(args),
-					resp, ARRAY_SIZE(resp),
-					SI476X_DEFAULT_TIMEOUT);
-}
-EXPORT_SYMBOL_GPL(si476x_core_cmd_set_property);
-
-/**
- * si476x_cmd_get_property() - send 'GET_PROPERTY' command to the device
- * @core:    device to send the command to
- * @property: property address
- *
- * Function return the value of property as u16 on success or a
- * negative error on failure
- */
-int si476x_core_cmd_get_property(struct si476x_core *core, u16 property)
-{
-	int err;
-	u8       resp[CMD_GET_PROPERTY_NRESP];
-	const u8 args[CMD_GET_PROPERTY_NARGS] = {
-		0x00,
-		msb(property),
-		lsb(property),
-	};
-
-	err = si476x_core_send_command(core, CMD_GET_PROPERTY,
-				       args, ARRAY_SIZE(args),
-				       resp, ARRAY_SIZE(resp),
-				       SI476X_DEFAULT_TIMEOUT);
-	if (err < 0)
-		return err;
-	else
-		return be16_to_cpup((__be16 *)(resp + 2));
-}
-EXPORT_SYMBOL_GPL(si476x_core_cmd_get_property);
-
-/**
- * si476x_cmd_dig_audio_pin_cfg() - send 'DIG_AUDIO_PIN_CFG' command to
- * the device
- * @core: device to send the command to
- * @dclk:  DCLK pin function configuration:
- *	   #SI476X_DCLK_NOOP     - do not modify the behaviour
- *         #SI476X_DCLK_TRISTATE - put the pin in tristate condition,
- *                                 enable 1MOhm pulldown
- *         #SI476X_DCLK_DAUDIO   - set the pin to be a part of digital
- *                                 audio interface
- * @dfs:   DFS pin function configuration:
- *         #SI476X_DFS_NOOP      - do not modify the behaviour
- *         #SI476X_DFS_TRISTATE  - put the pin in tristate condition,
- *                             enable 1MOhm pulldown
- *      SI476X_DFS_DAUDIO    - set the pin to be a part of digital
- *                             audio interface
- * @dout - DOUT pin function configuration:
- *      SI476X_DOUT_NOOP       - do not modify the behaviour
- *      SI476X_DOUT_TRISTATE   - put the pin in tristate condition,
- *                               enable 1MOhm pulldown
- *      SI476X_DOUT_I2S_OUTPUT - set this pin to be digital out on I2S
- *                               port 1
- *      SI476X_DOUT_I2S_INPUT  - set this pin to be digital in on I2S
- *                               port 1
- * @xout - XOUT pin function configuration:
- *	SI476X_XOUT_NOOP        - do not modify the behaviour
- *      SI476X_XOUT_TRISTATE    - put the pin in tristate condition,
- *                                enable 1MOhm pulldown
- *      SI476X_XOUT_I2S_INPUT   - set this pin to be digital in on I2S
- *                                port 1
- *      SI476X_XOUT_MODE_SELECT - set this pin to be the input that
- *                                selects the mode of the I2S audio
- *                                combiner (analog or HD)
- *                                [SI4761/63/65/67 Only]
- *
- * Function returns 0 on success and negative error code on failure
- */
-int si476x_core_cmd_dig_audio_pin_cfg(struct  si476x_core *core,
-				      enum si476x_dclk_config dclk,
-				      enum si476x_dfs_config  dfs,
-				      enum si476x_dout_config dout,
-				      enum si476x_xout_config xout)
-{
-	u8       resp[CMD_DIG_AUDIO_PIN_CFG_NRESP];
-	const u8 args[CMD_DIG_AUDIO_PIN_CFG_NARGS] = {
-		PIN_CFG_BYTE(dclk),
-		PIN_CFG_BYTE(dfs),
-		PIN_CFG_BYTE(dout),
-		PIN_CFG_BYTE(xout),
-	};
-
-	return si476x_core_send_command(core, CMD_DIG_AUDIO_PIN_CFG,
-					args, ARRAY_SIZE(args),
-					resp, ARRAY_SIZE(resp),
-					SI476X_DEFAULT_TIMEOUT);
-}
-EXPORT_SYMBOL_GPL(si476x_core_cmd_dig_audio_pin_cfg);
-
-/**
- * si476x_cmd_zif_pin_cfg - send 'ZIF_PIN_CFG_COMMAND'
- * @core - device to send the command to
- * @iqclk - IQCL pin function configuration:
- *       SI476X_IQCLK_NOOP     - do not modify the behaviour
- *       SI476X_IQCLK_TRISTATE - put the pin in tristate condition,
- *                               enable 1MOhm pulldown
- *       SI476X_IQCLK_IQ       - set pin to be a part of I/Q interace
- *                               in master mode
- * @iqfs - IQFS pin function configuration:
- *       SI476X_IQFS_NOOP     - do not modify the behaviour
- *       SI476X_IQFS_TRISTATE - put the pin in tristate condition,
- *                              enable 1MOhm pulldown
- *       SI476X_IQFS_IQ       - set pin to be a part of I/Q interace
- *                              in master mode
- * @iout - IOUT pin function configuration:
- *       SI476X_IOUT_NOOP     - do not modify the behaviour
- *       SI476X_IOUT_TRISTATE - put the pin in tristate condition,
- *                              enable 1MOhm pulldown
- *       SI476X_IOUT_OUTPUT   - set pin to be I out
- * @qout - QOUT pin function configuration:
- *       SI476X_QOUT_NOOP     - do not modify the behaviour
- *       SI476X_QOUT_TRISTATE - put the pin in tristate condition,
- *                              enable 1MOhm pulldown
- *       SI476X_QOUT_OUTPUT   - set pin to be Q out
- *
- * Function returns 0 on success and negative error code on failure
- */
-int si476x_core_cmd_zif_pin_cfg(struct si476x_core *core,
-				enum si476x_iqclk_config iqclk,
-				enum si476x_iqfs_config iqfs,
-				enum si476x_iout_config iout,
-				enum si476x_qout_config qout)
-{
-	u8       resp[CMD_ZIF_PIN_CFG_NRESP];
-	const u8 args[CMD_ZIF_PIN_CFG_NARGS] = {
-		PIN_CFG_BYTE(iqclk),
-		PIN_CFG_BYTE(iqfs),
-		PIN_CFG_BYTE(iout),
-		PIN_CFG_BYTE(qout),
-	};
-
-	return si476x_core_send_command(core, CMD_ZIF_PIN_CFG,
-					args, ARRAY_SIZE(args),
-					resp, ARRAY_SIZE(resp),
-					SI476X_DEFAULT_TIMEOUT);
-}
-EXPORT_SYMBOL_GPL(si476x_core_cmd_zif_pin_cfg);
-
-/**
- * si476x_cmd_ic_link_gpo_ctl_pin_cfg - send
- * 'IC_LINK_GPIO_CTL_PIN_CFG' comand to the device
- * @core - device to send the command to
- * @icin - ICIN pin function configuration:
- *      SI476X_ICIN_NOOP      - do not modify the behaviour
- *      SI476X_ICIN_TRISTATE  - put the pin in tristate condition,
- *                              enable 1MOhm pulldown
- *      SI476X_ICIN_GPO1_HIGH - set pin to be an output, drive it high
- *      SI476X_ICIN_GPO1_LOW  - set pin to be an output, drive it low
- *      SI476X_ICIN_IC_LINK   - set the pin to be a part of Inter-Chip link
- * @icip - ICIP pin function configuration:
- *      SI476X_ICIP_NOOP      - do not modify the behaviour
- *      SI476X_ICIP_TRISTATE  - put the pin in tristate condition,
- *                              enable 1MOhm pulldown
- *      SI476X_ICIP_GPO1_HIGH - set pin to be an output, drive it high
- *      SI476X_ICIP_GPO1_LOW  - set pin to be an output, drive it low
- *      SI476X_ICIP_IC_LINK   - set the pin to be a part of Inter-Chip link
- * @icon - ICON pin function configuration:
- *      SI476X_ICON_NOOP     - do not modify the behaviour
- *      SI476X_ICON_TRISTATE - put the pin in tristate condition,
- *                             enable 1MOhm pulldown
- *      SI476X_ICON_I2S      - set the pin to be a part of audio
- *                             interface in slave mode (DCLK)
- *      SI476X_ICON_IC_LINK  - set the pin to be a part of Inter-Chip link
- * @icop - ICOP pin function configuration:
- *      SI476X_ICOP_NOOP     - do not modify the behaviour
- *      SI476X_ICOP_TRISTATE - put the pin in tristate condition,
- *                             enable 1MOhm pulldown
- *      SI476X_ICOP_I2S      - set the pin to be a part of audio
- *                             interface in slave mode (DOUT)
- *                             [Si4761/63/65/67 Only]
- *      SI476X_ICOP_IC_LINK  - set the pin to be a part of Inter-Chip link
- *
- * Function returns 0 on success and negative error code on failure
- */
-int si476x_core_cmd_ic_link_gpo_ctl_pin_cfg(struct si476x_core *core,
-					    enum si476x_icin_config icin,
-					    enum si476x_icip_config icip,
-					    enum si476x_icon_config icon,
-					    enum si476x_icop_config icop)
-{
-	u8       resp[CMD_IC_LINK_GPO_CTL_PIN_CFG_NRESP];
-	const u8 args[CMD_IC_LINK_GPO_CTL_PIN_CFG_NARGS] = {
-		PIN_CFG_BYTE(icin),
-		PIN_CFG_BYTE(icip),
-		PIN_CFG_BYTE(icon),
-		PIN_CFG_BYTE(icop),
-	};
-
-	return si476x_core_send_command(core, CMD_IC_LINK_GPO_CTL_PIN_CFG,
-					args, ARRAY_SIZE(args),
-					resp, ARRAY_SIZE(resp),
-					SI476X_DEFAULT_TIMEOUT);
-}
-EXPORT_SYMBOL_GPL(si476x_core_cmd_ic_link_gpo_ctl_pin_cfg);
-
-/**
- * si476x_cmd_ana_audio_pin_cfg - send 'ANA_AUDIO_PIN_CFG' to the
- * device
- * @core - device to send the command to
- * @lrout - LROUT pin function configuration:
- *       SI476X_LROUT_NOOP     - do not modify the behaviour
- *       SI476X_LROUT_TRISTATE - put the pin in tristate condition,
- *                               enable 1MOhm pulldown
- *       SI476X_LROUT_AUDIO    - set pin to be audio output
- *       SI476X_LROUT_MPX      - set pin to be MPX output
- *
- * Function returns 0 on success and negative error code on failure
- */
-int si476x_core_cmd_ana_audio_pin_cfg(struct si476x_core *core,
-				      enum si476x_lrout_config lrout)
-{
-	u8       resp[CMD_ANA_AUDIO_PIN_CFG_NRESP];
-	const u8 args[CMD_ANA_AUDIO_PIN_CFG_NARGS] = {
-		PIN_CFG_BYTE(lrout),
-	};
-
-	return si476x_core_send_command(core, CMD_ANA_AUDIO_PIN_CFG,
-					args, ARRAY_SIZE(args),
-					resp, ARRAY_SIZE(resp),
-					SI476X_DEFAULT_TIMEOUT);
-}
-EXPORT_SYMBOL_GPL(si476x_core_cmd_ana_audio_pin_cfg);
-
-
-/**
- * si476x_cmd_intb_pin_cfg - send 'INTB_PIN_CFG' command to the device
- * @core - device to send the command to
- * @intb - INTB pin function configuration:
- *      SI476X_INTB_NOOP     - do not modify the behaviour
- *      SI476X_INTB_TRISTATE - put the pin in tristate condition,
- *                             enable 1MOhm pulldown
- *      SI476X_INTB_DAUDIO   - set pin to be a part of digital
- *                             audio interface in slave mode
- *      SI476X_INTB_IRQ      - set pin to be an interrupt request line
- * @a1 - A1 pin function configuration:
- *      SI476X_A1_NOOP     - do not modify the behaviour
- *      SI476X_A1_TRISTATE - put the pin in tristate condition,
- *                           enable 1MOhm pulldown
- *      SI476X_A1_IRQ      - set pin to be an interrupt request line
- *
- * Function returns 0 on success and negative error code on failure
- */
-static int si476x_core_cmd_intb_pin_cfg_a10(struct si476x_core *core,
-					    enum si476x_intb_config intb,
-					    enum si476x_a1_config a1)
-{
-	u8       resp[CMD_INTB_PIN_CFG_A10_NRESP];
-	const u8 args[CMD_INTB_PIN_CFG_NARGS] = {
-		PIN_CFG_BYTE(intb),
-		PIN_CFG_BYTE(a1),
-	};
-
-	return si476x_core_send_command(core, CMD_INTB_PIN_CFG,
-					args, ARRAY_SIZE(args),
-					resp, ARRAY_SIZE(resp),
-					SI476X_DEFAULT_TIMEOUT);
-}
-
-static int si476x_core_cmd_intb_pin_cfg_a20(struct si476x_core *core,
-					    enum si476x_intb_config intb,
-					    enum si476x_a1_config a1)
-{
-	u8       resp[CMD_INTB_PIN_CFG_A20_NRESP];
-	const u8 args[CMD_INTB_PIN_CFG_NARGS] = {
-		PIN_CFG_BYTE(intb),
-		PIN_CFG_BYTE(a1),
-	};
-
-	return si476x_core_send_command(core, CMD_INTB_PIN_CFG,
-					args, ARRAY_SIZE(args),
-					resp, ARRAY_SIZE(resp),
-					SI476X_DEFAULT_TIMEOUT);
-}
-
-
-
-/**
- * si476x_cmd_am_rsq_status - send 'AM_RSQ_STATUS' command to the
- * device
- * @core  - device to send the command to
- * @rsqack - if set command clears RSQINT, SNRINT, SNRLINT, RSSIHINT,
- *           RSSSILINT, BLENDINT, MULTHINT and MULTLINT
- * @attune - when set the values in the status report are the values
- *           that were calculated at tune
- * @cancel - abort ongoing seek/tune opertation
- * @stcack - clear the STCINT bin in status register
- * @report - all signal quality information retured by the command
- *           (if NULL then the output of the command is ignored)
- *
- * Function returns 0 on success and negative error code on failure
- */
-int si476x_core_cmd_am_rsq_status(struct si476x_core *core,
-				  struct si476x_rsq_status_args *rsqargs,
-				  struct si476x_rsq_status_report *report)
-{
-	int err;
-	u8       resp[CMD_AM_RSQ_STATUS_NRESP];
-	const u8 args[CMD_AM_RSQ_STATUS_NARGS] = {
-		rsqargs->rsqack << 3 | rsqargs->attune << 2 |
-		rsqargs->cancel << 1 | rsqargs->stcack,
-	};
-
-	err = si476x_core_send_command(core, CMD_AM_RSQ_STATUS,
-				       args, ARRAY_SIZE(args),
-				       resp, ARRAY_SIZE(resp),
-				       SI476X_DEFAULT_TIMEOUT);
-	/*
-	 * Besides getting received signal quality information this
-	 * command can be used to just acknowledge different interrupt
-	 * flags in those cases it is useless to copy and parse
-	 * received data so user can pass NULL, and thus avoid
-	 * unnecessary copying.
-	 */
-	if (!report)
-		return err;
-
-	report->snrhint		= 0b00001000 & resp[1];
-	report->snrlint		= 0b00000100 & resp[1];
-	report->rssihint	= 0b00000010 & resp[1];
-	report->rssilint	= 0b00000001 & resp[1];
-
-	report->bltf		= 0b10000000 & resp[2];
-	report->snr_ready	= 0b00100000 & resp[2];
-	report->rssiready	= 0b00001000 & resp[2];
-	report->afcrl		= 0b00000010 & resp[2];
-	report->valid		= 0b00000001 & resp[2];
-
-	report->readfreq	= be16_to_cpup((__be16 *)(resp + 3));
-	report->freqoff		= resp[5];
-	report->rssi		= resp[6];
-	report->snr		= resp[7];
-	report->lassi		= resp[9];
-	report->hassi		= resp[10];
-	report->mult		= resp[11];
-	report->dev		= resp[12];
-
-	return err;
-}
-EXPORT_SYMBOL_GPL(si476x_core_cmd_am_rsq_status);
-
-int si476x_core_cmd_fm_acf_status(struct si476x_core *core,
-			     struct si476x_acf_status_report *report)
-{
-	int err;
-	u8       resp[CMD_FM_ACF_STATUS_NRESP];
-	const u8 args[CMD_FM_ACF_STATUS_NARGS] = {
-		0x0,
-	};
-
-	if (!report)
-		return -EINVAL;
-
-	err = si476x_core_send_command(core, CMD_FM_ACF_STATUS,
-				       args, ARRAY_SIZE(args),
-				       resp, ARRAY_SIZE(resp),
-				       SI476X_DEFAULT_TIMEOUT);
-	if (err < 0)
-		return err;
-
-	report->blend_int	= resp[1] & SI476X_ACF_BLEND_INT;
-	report->hblend_int	= resp[1] & SI476X_ACF_HIBLEND_INT;
-	report->hicut_int	= resp[1] & SI476X_ACF_HICUT_INT;
-	report->chbw_int	= resp[1] & SI476X_ACF_CHBW_INT;
-	report->softmute_int	= resp[1] & SI476X_ACF_SOFTMUTE_INT;
-	report->smute		= resp[2] & SI476X_ACF_SMUTE;
-	report->smattn		= resp[3] & SI476X_ACF_SMATTN;
-	report->chbw		= resp[4];
-	report->hicut		= resp[5];
-	report->hiblend		= resp[6];
-	report->pilot		= resp[7] & SI476X_ACF_PILOT;
-	report->stblend		= resp[7] & SI476X_ACF_STBLEND;
-
-	return err;
-}
-EXPORT_SYMBOL_GPL(si476x_core_cmd_fm_acf_status);
-
-int si476x_core_cmd_am_acf_status(struct si476x_core *core,
-				  struct si476x_acf_status_report *report)
-{
-	int err;
-	u8       resp[CMD_AM_ACF_STATUS_NRESP];
-	const u8 args[CMD_AM_ACF_STATUS_NARGS] = {
-		0x0,
-	};
-
-	if (!report)
-		return -EINVAL;
-
-	err = si476x_core_send_command(core, CMD_AM_ACF_STATUS,
-				       args, ARRAY_SIZE(args),
-				       resp, ARRAY_SIZE(resp),
-				       SI476X_DEFAULT_TIMEOUT);
-	if (err < 0)
-		return err;
-
-	report->blend_int	= resp[1] & SI476X_ACF_BLEND_INT;
-	report->hblend_int	= resp[1] & SI476X_ACF_HIBLEND_INT;
-	report->hicut_int	= resp[1] & SI476X_ACF_HICUT_INT;
-	report->chbw_int	= resp[1] & SI476X_ACF_CHBW_INT;
-	report->softmute_int	= resp[1] & SI476X_ACF_SOFTMUTE_INT;
-	report->smute		= resp[2] & SI476X_ACF_SMUTE;
-	report->smattn		= resp[3] & SI476X_ACF_SMATTN;
-	report->chbw		= resp[4];
-	report->hicut		= resp[5];
-
-	return err;
-}
-EXPORT_SYMBOL_GPL(si476x_core_cmd_am_acf_status);
-
-
-/**
- * si476x_cmd_fm_seek_start - send 'FM_SEEK_START' command to the
- * device
- * @core  - device to send the command to
- * @seekup - if set the direction of the search is 'up'
- * @wrap   - if set seek wraps when hitting band limit
- *
- * This function begins search for a valid station. The station is
- * considered valid when 'FM_VALID_SNR_THRESHOLD' and
- * 'FM_VALID_RSSI_THRESHOLD' and 'FM_VALID_MAX_TUNE_ERROR' criteria
- * are met.
-} *
- * Function returns 0 on success and negative error code on failure
- */
-int si476x_core_cmd_fm_seek_start(struct si476x_core *core,
-				  bool seekup, bool wrap)
-{
-	u8       resp[CMD_FM_SEEK_START_NRESP];
-	const u8 args[CMD_FM_SEEK_START_NARGS] = {
-		seekup << 3 | wrap << 2,
-	};
-
-	return si476x_cmd_tune_seek_freq(core, CMD_FM_SEEK_START,
-					 args, sizeof(args),
-					 resp, sizeof(resp));
-}
-EXPORT_SYMBOL_GPL(si476x_core_cmd_fm_seek_start);
-
-/**
- * si476x_cmd_fm_rds_status - send 'FM_RDS_STATUS' command to the
- * device
- * @core - device to send the command to
- * @status_only - if set the data is not removed from RDSFIFO,
- *                RDSFIFOUSED is not decremented and data in all the
- *                rest RDS data contains the last valid info received
- * @mtfifo if set the command clears RDS receive FIFO
- * @intack if set the command clards the RDSINT bit.
- *
- * Function returns 0 on success and negative error code on failure
- */
-int si476x_core_cmd_fm_rds_status(struct si476x_core *core,
-				  bool status_only,
-				  bool mtfifo,
-				  bool intack,
-				  struct si476x_rds_status_report *report)
-{
-	int err;
-	u8       resp[CMD_FM_RDS_STATUS_NRESP];
-	const u8 args[CMD_FM_RDS_STATUS_NARGS] = {
-		status_only << 2 | mtfifo << 1 | intack,
-	};
-
-	err = si476x_core_send_command(core, CMD_FM_RDS_STATUS,
-				       args, ARRAY_SIZE(args),
-				       resp, ARRAY_SIZE(resp),
-				       SI476X_DEFAULT_TIMEOUT);
-	/*
-	 * Besides getting RDS status information this command can be
-	 * used to just acknowledge different interrupt flags in those
-	 * cases it is useless to copy and parse received data so user
-	 * can pass NULL, and thus avoid unnecessary copying.
-	 */
-	if (err < 0 || report == NULL)
-		return err;
-
-	report->rdstpptyint	= 0b00010000 & resp[1];
-	report->rdspiint	= 0b00001000 & resp[1];
-	report->rdssyncint	= 0b00000010 & resp[1];
-	report->rdsfifoint	= 0b00000001 & resp[1];
-
-	report->tpptyvalid	= 0b00010000 & resp[2];
-	report->pivalid		= 0b00001000 & resp[2];
-	report->rdssync		= 0b00000010 & resp[2];
-	report->rdsfifolost	= 0b00000001 & resp[2];
-
-	report->tp		= 0b00100000 & resp[3];
-	report->pty		= 0b00011111 & resp[3];
-
-	report->pi		= be16_to_cpup((__be16 *)(resp + 4));
-	report->rdsfifoused	= resp[6];
-
-	report->ble[V4L2_RDS_BLOCK_A]	= 0b11000000 & resp[7];
-	report->ble[V4L2_RDS_BLOCK_B]	= 0b00110000 & resp[7];
-	report->ble[V4L2_RDS_BLOCK_C]	= 0b00001100 & resp[7];
-	report->ble[V4L2_RDS_BLOCK_D]	= 0b00000011 & resp[7];
-
-	report->rds[V4L2_RDS_BLOCK_A].block = V4L2_RDS_BLOCK_A;
-	report->rds[V4L2_RDS_BLOCK_A].msb = resp[8];
-	report->rds[V4L2_RDS_BLOCK_A].lsb = resp[9];
-
-	report->rds[V4L2_RDS_BLOCK_B].block = V4L2_RDS_BLOCK_B;
-	report->rds[V4L2_RDS_BLOCK_B].msb = resp[10];
-	report->rds[V4L2_RDS_BLOCK_B].lsb = resp[11];
-
-	report->rds[V4L2_RDS_BLOCK_C].block = V4L2_RDS_BLOCK_C;
-	report->rds[V4L2_RDS_BLOCK_C].msb = resp[12];
-	report->rds[V4L2_RDS_BLOCK_C].lsb = resp[13];
-
-	report->rds[V4L2_RDS_BLOCK_D].block = V4L2_RDS_BLOCK_D;
-	report->rds[V4L2_RDS_BLOCK_D].msb = resp[14];
-	report->rds[V4L2_RDS_BLOCK_D].lsb = resp[15];
-
-	return err;
-}
-EXPORT_SYMBOL_GPL(si476x_core_cmd_fm_rds_status);
-
-int si476x_core_cmd_fm_rds_blockcount(struct si476x_core *core,
-				bool clear,
-				struct si476x_rds_blockcount_report *report)
-{
-	int err;
-	u8       resp[CMD_FM_RDS_BLOCKCOUNT_NRESP];
-	const u8 args[CMD_FM_RDS_BLOCKCOUNT_NARGS] = {
-		clear,
-	};
-
-	if (!report)
-		return -EINVAL;
-
-	err = si476x_core_send_command(core, CMD_FM_RDS_BLOCKCOUNT,
-				       args, ARRAY_SIZE(args),
-				       resp, ARRAY_SIZE(resp),
-				       SI476X_DEFAULT_TIMEOUT);
-
-	if (!err) {
-		report->expected	= be16_to_cpup((__be16 *)(resp + 2));
-		report->received	= be16_to_cpup((__be16 *)(resp + 4));
-		report->uncorrectable	= be16_to_cpup((__be16 *)(resp + 6));
-	}
-
-	return err;
-}
-EXPORT_SYMBOL_GPL(si476x_core_cmd_fm_rds_blockcount);
-
-int si476x_core_cmd_fm_phase_diversity(struct si476x_core *core,
-				       enum si476x_phase_diversity_mode mode)
-{
-	u8       resp[CMD_FM_PHASE_DIVERSITY_NRESP];
-	const u8 args[CMD_FM_PHASE_DIVERSITY_NARGS] = {
-		mode & 0b111,
-	};
-
-	return si476x_core_send_command(core, CMD_FM_PHASE_DIVERSITY,
-					args, ARRAY_SIZE(args),
-					resp, ARRAY_SIZE(resp),
-					SI476X_DEFAULT_TIMEOUT);
-}
-EXPORT_SYMBOL_GPL(si476x_core_cmd_fm_phase_diversity);
-/**
- * si476x_core_cmd_fm_phase_div_status() - get the phase diversity
- * status
- *
- * @core: si476x device
- *
- * NOTE caller must hold core lock
- *
- * Function returns the value of the status bit in case of success and
- * negative error code in case of failre.
- */
-int si476x_core_cmd_fm_phase_div_status(struct si476x_core *core)
-{
-	int err;
-	u8 resp[CMD_FM_PHASE_DIV_STATUS_NRESP];
-
-	err = si476x_core_send_command(core, CMD_FM_PHASE_DIV_STATUS,
-				       NULL, 0,
-				       resp, ARRAY_SIZE(resp),
-				       SI476X_DEFAULT_TIMEOUT);
-
-	return (err < 0) ? err : resp[1];
-}
-EXPORT_SYMBOL_GPL(si476x_core_cmd_fm_phase_div_status);
-
-
-/**
- * si476x_cmd_am_seek_start - send 'FM_SEEK_START' command to the
- * device
- * @core  - device to send the command to
- * @seekup - if set the direction of the search is 'up'
- * @wrap   - if set seek wraps when hitting band limit
- *
- * This function begins search for a valid station. The station is
- * considered valid when 'FM_VALID_SNR_THRESHOLD' and
- * 'FM_VALID_RSSI_THRESHOLD' and 'FM_VALID_MAX_TUNE_ERROR' criteria
- * are met.
- *
- * Function returns 0 on success and negative error code on failure
- */
-int si476x_core_cmd_am_seek_start(struct si476x_core *core,
-				  bool seekup, bool wrap)
-{
-	u8       resp[CMD_AM_SEEK_START_NRESP];
-	const u8 args[CMD_AM_SEEK_START_NARGS] = {
-		seekup << 3 | wrap << 2,
-	};
-
-	return si476x_cmd_tune_seek_freq(core,  CMD_AM_SEEK_START,
-					 args, sizeof(args),
-					 resp, sizeof(resp));
-}
-EXPORT_SYMBOL_GPL(si476x_core_cmd_am_seek_start);
-
-
-
-static int si476x_core_cmd_power_up_a10(struct si476x_core *core,
-					struct si476x_power_up_args *puargs)
-{
-	u8       resp[CMD_POWER_UP_A10_NRESP];
-	const bool intsel = (core->pinmux.a1 == SI476X_A1_IRQ);
-	const bool ctsen  = (core->client->irq != 0);
-	const u8 args[CMD_POWER_UP_A10_NARGS] = {
-		0xF7,		/* Reserved, always 0xF7 */
-		0x3F & puargs->xcload,	/* First two bits are reserved to be
-				 * zeros */
-		ctsen << 7 | intsel << 6 | 0x07, /* Last five bits
-						   * are reserved to
-						   * be written as 0x7 */
-		puargs->func << 4 | puargs->freq,
-		0x11,		/* Reserved, always 0x11 */
-	};
-
-	return si476x_core_send_command(core, CMD_POWER_UP,
-					args, ARRAY_SIZE(args),
-					resp, ARRAY_SIZE(resp),
-					SI476X_TIMEOUT_POWER_UP);
-}
-
-static int si476x_core_cmd_power_up_a20(struct si476x_core *core,
-				 struct si476x_power_up_args *puargs)
-{
-	u8       resp[CMD_POWER_UP_A20_NRESP];
-	const bool intsel = (core->pinmux.a1 == SI476X_A1_IRQ);
-	const bool ctsen  = (core->client->irq != 0);
-	const u8 args[CMD_POWER_UP_A20_NARGS] = {
-		puargs->ibias6x << 7 | puargs->xstart,
-		0x3F & puargs->xcload,	/* First two bits are reserved to be
-					 * zeros */
-		ctsen << 7 | intsel << 6 | puargs->fastboot << 5 |
-		puargs->xbiashc << 3 | puargs->xbias,
-		puargs->func << 4 | puargs->freq,
-		0x10 | puargs->xmode,
-	};
-
-	return si476x_core_send_command(core, CMD_POWER_UP,
-					args, ARRAY_SIZE(args),
-					resp, ARRAY_SIZE(resp),
-					SI476X_TIMEOUT_POWER_UP);
-}
-
-static int si476x_core_cmd_power_down_a10(struct si476x_core *core,
-					  struct si476x_power_down_args *pdargs)
-{
-	u8 resp[CMD_POWER_DOWN_A10_NRESP];
-
-	return si476x_core_send_command(core, CMD_POWER_DOWN,
-					NULL, 0,
-					resp, ARRAY_SIZE(resp),
-					SI476X_DEFAULT_TIMEOUT);
-}
-
-static int si476x_core_cmd_power_down_a20(struct si476x_core *core,
-					  struct si476x_power_down_args *pdargs)
-{
-	u8 resp[CMD_POWER_DOWN_A20_NRESP];
-	const u8 args[CMD_POWER_DOWN_A20_NARGS] = {
-		pdargs->xosc,
-	};
-	return si476x_core_send_command(core, CMD_POWER_DOWN,
-					args, ARRAY_SIZE(args),
-					resp, ARRAY_SIZE(resp),
-					SI476X_DEFAULT_TIMEOUT);
-}
-
-static int si476x_core_cmd_am_tune_freq_a10(struct si476x_core *core,
-					struct si476x_tune_freq_args *tuneargs)
-{
-
-	const int am_freq = tuneargs->freq;
-	u8       resp[CMD_AM_TUNE_FREQ_NRESP];
-	const u8 args[CMD_AM_TUNE_FREQ_NARGS] = {
-		(tuneargs->hd << 6),
-		msb(am_freq),
-		lsb(am_freq),
-	};
-
-	return si476x_cmd_tune_seek_freq(core, CMD_AM_TUNE_FREQ, args,
-					 sizeof(args),
-					 resp, sizeof(resp));
-}
-
-static int si476x_core_cmd_am_tune_freq_a20(struct si476x_core *core,
-					struct si476x_tune_freq_args *tuneargs)
-{
-	const int am_freq = tuneargs->freq;
-	u8       resp[CMD_AM_TUNE_FREQ_NRESP];
-	const u8 args[CMD_AM_TUNE_FREQ_NARGS] = {
-		(tuneargs->zifsr << 6) | (tuneargs->injside & 0b11),
-		msb(am_freq),
-		lsb(am_freq),
-	};
-
-	return si476x_cmd_tune_seek_freq(core, CMD_AM_TUNE_FREQ,
-					 args, sizeof(args),
-					 resp, sizeof(resp));
-}
-
-static int si476x_core_cmd_fm_rsq_status_a10(struct si476x_core *core,
-					struct si476x_rsq_status_args *rsqargs,
-					struct si476x_rsq_status_report *report)
-{
-	int err;
-	u8       resp[CMD_FM_RSQ_STATUS_A10_NRESP];
-	const u8 args[CMD_FM_RSQ_STATUS_A10_NARGS] = {
-		rsqargs->rsqack << 3 | rsqargs->attune << 2 |
-		rsqargs->cancel << 1 | rsqargs->stcack,
-	};
-
-	err = si476x_core_send_command(core, CMD_FM_RSQ_STATUS,
-				       args, ARRAY_SIZE(args),
-				       resp, ARRAY_SIZE(resp),
-				       SI476X_DEFAULT_TIMEOUT);
-	/*
-	 * Besides getting received signal quality information this
-	 * command can be used to just acknowledge different interrupt
-	 * flags in those cases it is useless to copy and parse
-	 * received data so user can pass NULL, and thus avoid
-	 * unnecessary copying.
-	 */
-	if (err < 0 || report == NULL)
-		return err;
-
-	report->multhint	= 0b10000000 & resp[1];
-	report->multlint	= 0b01000000 & resp[1];
-	report->snrhint		= 0b00001000 & resp[1];
-	report->snrlint		= 0b00000100 & resp[1];
-	report->rssihint	= 0b00000010 & resp[1];
-	report->rssilint	= 0b00000001 & resp[1];
-
-	report->bltf		= 0b10000000 & resp[2];
-	report->snr_ready	= 0b00100000 & resp[2];
-	report->rssiready	= 0b00001000 & resp[2];
-	report->afcrl		= 0b00000010 & resp[2];
-	report->valid		= 0b00000001 & resp[2];
-
-	report->readfreq	= be16_to_cpup((__be16 *)(resp + 3));
-	report->freqoff		= resp[5];
-	report->rssi		= resp[6];
-	report->snr		= resp[7];
-	report->lassi		= resp[9];
-	report->hassi		= resp[10];
-	report->mult		= resp[11];
-	report->dev		= resp[12];
-	report->readantcap	= be16_to_cpup((__be16 *)(resp + 13));
-	report->assi		= resp[15];
-	report->usn		= resp[16];
-
-	return err;
-}
-
-static int si476x_core_cmd_fm_rsq_status_a20(struct si476x_core *core,
-					     struct si476x_rsq_status_args *rsqargs,
-					     struct si476x_rsq_status_report *report)
-{
-	int err;
-	u8       resp[CMD_FM_RSQ_STATUS_A10_NRESP];
-	const u8 args[CMD_FM_RSQ_STATUS_A30_NARGS] = {
-		rsqargs->primary << 4 | rsqargs->rsqack << 3 |
-		rsqargs->attune  << 2 | rsqargs->cancel << 1 |
-		rsqargs->stcack,
-	};
-
-	err = si476x_core_send_command(core, CMD_FM_RSQ_STATUS,
-				       args, ARRAY_SIZE(args),
-				       resp, ARRAY_SIZE(resp),
-				       SI476X_DEFAULT_TIMEOUT);
-	/*
-	 * Besides getting received signal quality information this
-	 * command can be used to just acknowledge different interrupt
-	 * flags in those cases it is useless to copy and parse
-	 * received data so user can pass NULL, and thus avoid
-	 * unnecessary copying.
-	 */
-	if (err < 0 || report == NULL)
-		return err;
-
-	report->multhint	= 0b10000000 & resp[1];
-	report->multlint	= 0b01000000 & resp[1];
-	report->snrhint		= 0b00001000 & resp[1];
-	report->snrlint		= 0b00000100 & resp[1];
-	report->rssihint	= 0b00000010 & resp[1];
-	report->rssilint	= 0b00000001 & resp[1];
-
-	report->bltf		= 0b10000000 & resp[2];
-	report->snr_ready	= 0b00100000 & resp[2];
-	report->rssiready	= 0b00001000 & resp[2];
-	report->afcrl		= 0b00000010 & resp[2];
-	report->valid		= 0b00000001 & resp[2];
-
-	report->readfreq	= be16_to_cpup((__be16 *)(resp + 3));
-	report->freqoff		= resp[5];
-	report->rssi		= resp[6];
-	report->snr		= resp[7];
-	report->lassi		= resp[9];
-	report->hassi		= resp[10];
-	report->mult		= resp[11];
-	report->dev		= resp[12];
-	report->readantcap	= be16_to_cpup((__be16 *)(resp + 13));
-	report->assi		= resp[15];
-	report->usn		= resp[16];
-
-	return err;
-}
-
-
-static int si476x_core_cmd_fm_rsq_status_a30(struct si476x_core *core,
-					struct si476x_rsq_status_args *rsqargs,
-					struct si476x_rsq_status_report *report)
-{
-	int err;
-	u8       resp[CMD_FM_RSQ_STATUS_A30_NRESP];
-	const u8 args[CMD_FM_RSQ_STATUS_A30_NARGS] = {
-		rsqargs->primary << 4 | rsqargs->rsqack << 3 |
-		rsqargs->attune << 2 | rsqargs->cancel << 1 |
-		rsqargs->stcack,
-	};
-
-	err = si476x_core_send_command(core, CMD_FM_RSQ_STATUS,
-				       args, ARRAY_SIZE(args),
-				       resp, ARRAY_SIZE(resp),
-				       SI476X_DEFAULT_TIMEOUT);
-	/*
-	 * Besides getting received signal quality information this
-	 * command can be used to just acknowledge different interrupt
-	 * flags in those cases it is useless to copy and parse
-	 * received data so user can pass NULL, and thus avoid
-	 * unnecessary copying.
-	 */
-	if (err < 0 || report == NULL)
-		return err;
-
-	report->multhint	= 0b10000000 & resp[1];
-	report->multlint	= 0b01000000 & resp[1];
-	report->snrhint		= 0b00001000 & resp[1];
-	report->snrlint		= 0b00000100 & resp[1];
-	report->rssihint	= 0b00000010 & resp[1];
-	report->rssilint	= 0b00000001 & resp[1];
-
-	report->bltf		= 0b10000000 & resp[2];
-	report->snr_ready	= 0b00100000 & resp[2];
-	report->rssiready	= 0b00001000 & resp[2];
-	report->injside         = 0b00000100 & resp[2];
-	report->afcrl		= 0b00000010 & resp[2];
-	report->valid		= 0b00000001 & resp[2];
-
-	report->readfreq	= be16_to_cpup((__be16 *)(resp + 3));
-	report->freqoff		= resp[5];
-	report->rssi		= resp[6];
-	report->snr		= resp[7];
-	report->issi		= resp[8];
-	report->lassi		= resp[9];
-	report->hassi		= resp[10];
-	report->mult		= resp[11];
-	report->dev		= resp[12];
-	report->readantcap	= be16_to_cpup((__be16 *)(resp + 13));
-	report->assi		= resp[15];
-	report->usn		= resp[16];
-
-	report->pilotdev	= resp[17];
-	report->rdsdev		= resp[18];
-	report->assidev		= resp[19];
-	report->strongdev	= resp[20];
-	report->rdspi		= be16_to_cpup((__be16 *)(resp + 21));
-
-	return err;
-}
-
-static int si476x_core_cmd_fm_tune_freq_a10(struct si476x_core *core,
-					struct si476x_tune_freq_args *tuneargs)
-{
-	u8       resp[CMD_FM_TUNE_FREQ_NRESP];
-	const u8 args[CMD_FM_TUNE_FREQ_A10_NARGS] = {
-		(tuneargs->hd << 6) | (tuneargs->tunemode << 4)
-		| (tuneargs->smoothmetrics << 2),
-		msb(tuneargs->freq),
-		lsb(tuneargs->freq),
-		msb(tuneargs->antcap),
-		lsb(tuneargs->antcap)
-	};
-
-	return si476x_cmd_tune_seek_freq(core, CMD_FM_TUNE_FREQ,
-					 args, sizeof(args),
-					 resp, sizeof(resp));
-}
-
-static int si476x_core_cmd_fm_tune_freq_a20(struct si476x_core *core,
-					struct si476x_tune_freq_args *tuneargs)
-{
-	u8       resp[CMD_FM_TUNE_FREQ_NRESP];
-	const u8 args[CMD_FM_TUNE_FREQ_A20_NARGS] = {
-		(tuneargs->hd << 6) | (tuneargs->tunemode << 4)
-		|  (tuneargs->smoothmetrics << 2) | (tuneargs->injside),
-		msb(tuneargs->freq),
-		lsb(tuneargs->freq),
-	};
-
-	return si476x_cmd_tune_seek_freq(core, CMD_FM_TUNE_FREQ,
-					 args, sizeof(args),
-					 resp, sizeof(resp));
-}
-
-static int si476x_core_cmd_agc_status_a20(struct si476x_core *core,
-					struct si476x_agc_status_report *report)
-{
-	int err;
-	u8 resp[CMD_AGC_STATUS_NRESP_A20];
-
-	if (!report)
-		return -EINVAL;
-
-	err = si476x_core_send_command(core, CMD_AGC_STATUS,
-				       NULL, 0,
-				       resp, ARRAY_SIZE(resp),
-				       SI476X_DEFAULT_TIMEOUT);
-	if (err < 0)
-		return err;
-
-	report->mxhi		= resp[1] & SI476X_AGC_MXHI;
-	report->mxlo		= resp[1] & SI476X_AGC_MXLO;
-	report->lnahi		= resp[1] & SI476X_AGC_LNAHI;
-	report->lnalo		= resp[1] & SI476X_AGC_LNALO;
-	report->fmagc1		= resp[2];
-	report->fmagc2		= resp[3];
-	report->pgagain		= resp[4];
-	report->fmwblang	= resp[5];
-
-	return err;
-}
-
-static int si476x_core_cmd_agc_status_a10(struct si476x_core *core,
-					struct si476x_agc_status_report *report)
-{
-	int err;
-	u8 resp[CMD_AGC_STATUS_NRESP_A10];
-
-	if (!report)
-		return -EINVAL;
-
-	err = si476x_core_send_command(core, CMD_AGC_STATUS,
-				       NULL, 0,
-				       resp, ARRAY_SIZE(resp),
-				       SI476X_DEFAULT_TIMEOUT);
-	if (err < 0)
-		return err;
-
-	report->mxhi	= resp[1] & SI476X_AGC_MXHI;
-	report->mxlo	= resp[1] & SI476X_AGC_MXLO;
-	report->lnahi	= resp[1] & SI476X_AGC_LNAHI;
-	report->lnalo	= resp[1] & SI476X_AGC_LNALO;
-
-	return err;
-}
-
-typedef int (*tune_freq_func_t) (struct si476x_core *core,
-				 struct si476x_tune_freq_args *tuneargs);
-
-static struct {
-	int (*power_up) (struct si476x_core *,
-			 struct si476x_power_up_args *);
-	int (*power_down) (struct si476x_core *,
-			   struct si476x_power_down_args *);
-
-	tune_freq_func_t fm_tune_freq;
-	tune_freq_func_t am_tune_freq;
-
-	int (*fm_rsq_status)(struct si476x_core *,
-			     struct si476x_rsq_status_args *,
-			     struct si476x_rsq_status_report *);
-
-	int (*agc_status)(struct si476x_core *,
-			  struct si476x_agc_status_report *);
-	int (*intb_pin_cfg)(struct si476x_core *core,
-			    enum si476x_intb_config intb,
-			    enum si476x_a1_config a1);
-} si476x_cmds_vtable[] = {
-	[SI476X_REVISION_A10] = {
-		.power_up	= si476x_core_cmd_power_up_a10,
-		.power_down	= si476x_core_cmd_power_down_a10,
-		.fm_tune_freq	= si476x_core_cmd_fm_tune_freq_a10,
-		.am_tune_freq	= si476x_core_cmd_am_tune_freq_a10,
-		.fm_rsq_status	= si476x_core_cmd_fm_rsq_status_a10,
-		.agc_status	= si476x_core_cmd_agc_status_a10,
-		.intb_pin_cfg   = si476x_core_cmd_intb_pin_cfg_a10,
-	},
-	[SI476X_REVISION_A20] = {
-		.power_up	= si476x_core_cmd_power_up_a20,
-		.power_down	= si476x_core_cmd_power_down_a20,
-		.fm_tune_freq	= si476x_core_cmd_fm_tune_freq_a20,
-		.am_tune_freq	= si476x_core_cmd_am_tune_freq_a20,
-		.fm_rsq_status	= si476x_core_cmd_fm_rsq_status_a20,
-		.agc_status	= si476x_core_cmd_agc_status_a20,
-		.intb_pin_cfg   = si476x_core_cmd_intb_pin_cfg_a20,
-	},
-	[SI476X_REVISION_A30] = {
-		.power_up	= si476x_core_cmd_power_up_a20,
-		.power_down	= si476x_core_cmd_power_down_a20,
-		.fm_tune_freq	= si476x_core_cmd_fm_tune_freq_a20,
-		.am_tune_freq	= si476x_core_cmd_am_tune_freq_a20,
-		.fm_rsq_status	= si476x_core_cmd_fm_rsq_status_a30,
-		.agc_status	= si476x_core_cmd_agc_status_a20,
-		.intb_pin_cfg   = si476x_core_cmd_intb_pin_cfg_a20,
-	},
-};
-
-int si476x_core_cmd_power_up(struct si476x_core *core,
-			     struct si476x_power_up_args *args)
-{
-	BUG_ON(core->revision > SI476X_REVISION_A30 ||
-	       core->revision == -1);
-	return si476x_cmds_vtable[core->revision].power_up(core, args);
-}
-EXPORT_SYMBOL_GPL(si476x_core_cmd_power_up);
-
-int si476x_core_cmd_power_down(struct si476x_core *core,
-			       struct si476x_power_down_args *args)
-{
-	BUG_ON(core->revision > SI476X_REVISION_A30 ||
-	       core->revision == -1);
-	return si476x_cmds_vtable[core->revision].power_down(core, args);
-}
-EXPORT_SYMBOL_GPL(si476x_core_cmd_power_down);
-
-int si476x_core_cmd_fm_tune_freq(struct si476x_core *core,
-				 struct si476x_tune_freq_args *args)
-{
-	BUG_ON(core->revision > SI476X_REVISION_A30 ||
-	       core->revision == -1);
-	return si476x_cmds_vtable[core->revision].fm_tune_freq(core, args);
-}
-EXPORT_SYMBOL_GPL(si476x_core_cmd_fm_tune_freq);
-
-int si476x_core_cmd_am_tune_freq(struct si476x_core *core,
-				 struct si476x_tune_freq_args *args)
-{
-	BUG_ON(core->revision > SI476X_REVISION_A30 ||
-	       core->revision == -1);
-	return si476x_cmds_vtable[core->revision].am_tune_freq(core, args);
-}
-EXPORT_SYMBOL_GPL(si476x_core_cmd_am_tune_freq);
-
-int si476x_core_cmd_fm_rsq_status(struct si476x_core *core,
-				  struct si476x_rsq_status_args *args,
-				  struct si476x_rsq_status_report *report)
-
-{
-	BUG_ON(core->revision > SI476X_REVISION_A30 ||
-	       core->revision == -1);
-	return si476x_cmds_vtable[core->revision].fm_rsq_status(core, args,
-								report);
-}
-EXPORT_SYMBOL_GPL(si476x_core_cmd_fm_rsq_status);
-
-int si476x_core_cmd_agc_status(struct si476x_core *core,
-				  struct si476x_agc_status_report *report)
-
-{
-	BUG_ON(core->revision > SI476X_REVISION_A30 ||
-	       core->revision == -1);
-	return si476x_cmds_vtable[core->revision].agc_status(core, report);
-}
-EXPORT_SYMBOL_GPL(si476x_core_cmd_agc_status);
-
-int si476x_core_cmd_intb_pin_cfg(struct si476x_core *core,
-			    enum si476x_intb_config intb,
-			    enum si476x_a1_config a1)
-{
-	BUG_ON(core->revision > SI476X_REVISION_A30 ||
-	       core->revision == -1);
-
-	return si476x_cmds_vtable[core->revision].intb_pin_cfg(core, intb, a1);
-}
-EXPORT_SYMBOL_GPL(si476x_core_cmd_intb_pin_cfg);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>");
-MODULE_DESCRIPTION("API for command exchange for si476x");

drivers/mfd/si476x-i2c.c

@@ -1,886 +0,0 @@
-/*
- * drivers/mfd/si476x-i2c.c -- Core device driver for si476x MFD
- * device
- *
- * Copyright (C) 2012 Innovative Converged Devices(ICD)
- * Copyright (C) 2013 Andrey Smirnov
- *
- * Author: Andrey Smirnov <andrew.smirnov@gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- */
-#include <linux/module.h>
-
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <linux/gpio.h>
-#include <linux/regulator/consumer.h>
-#include <linux/i2c.h>
-#include <linux/err.h>
-
-#include <linux/mfd/si476x-core.h>
-
-#define SI476X_MAX_IO_ERRORS		10
-#define SI476X_DRIVER_RDS_FIFO_DEPTH	128
-
-/**
- * si476x_core_config_pinmux() - pin function configuration function
- *
- * @core: Core device structure
- *
- * Configure the functions of the pins of the radio chip.
- *
- * The function returns zero in case of succes or negative error code
- * otherwise.
- */
-static int si476x_core_config_pinmux(struct si476x_core *core)
-{
-	int err;
-	dev_dbg(&core->client->dev, "Configuring pinmux\n");
-	err = si476x_core_cmd_dig_audio_pin_cfg(core,
-						core->pinmux.dclk,
-						core->pinmux.dfs,
-						core->pinmux.dout,
-						core->pinmux.xout);
-	if (err < 0) {
-		dev_err(&core->client->dev,
-			"Failed to configure digital audio pins(err = %d)\n",
-			err);
-		return err;
-	}
-
-	err = si476x_core_cmd_zif_pin_cfg(core,
-					  core->pinmux.iqclk,
-					  core->pinmux.iqfs,
-					  core->pinmux.iout,
-					  core->pinmux.qout);
-	if (err < 0) {
-		dev_err(&core->client->dev,
-			"Failed to configure ZIF pins(err = %d)\n",
-			err);
-		return err;
-	}
-
-	err = si476x_core_cmd_ic_link_gpo_ctl_pin_cfg(core,
-						      core->pinmux.icin,
-						      core->pinmux.icip,
-						      core->pinmux.icon,
-						      core->pinmux.icop);
-	if (err < 0) {
-		dev_err(&core->client->dev,
-			"Failed to configure IC-Link/GPO pins(err = %d)\n",
-			err);
-		return err;
-	}
-
-	err = si476x_core_cmd_ana_audio_pin_cfg(core,
-						core->pinmux.lrout);
-	if (err < 0) {
-		dev_err(&core->client->dev,
-			"Failed to configure analog audio pins(err = %d)\n",
-			err);
-		return err;
-	}
-
-	err = si476x_core_cmd_intb_pin_cfg(core,
-					   core->pinmux.intb,
-					   core->pinmux.a1);
-	if (err < 0) {
-		dev_err(&core->client->dev,
-			"Failed to configure interrupt pins(err = %d)\n",
-			err);
-		return err;
-	}
-
-	return 0;
-}
-
-static inline void si476x_core_schedule_polling_work(struct si476x_core *core)
-{
-	schedule_delayed_work(&core->status_monitor,
-			      usecs_to_jiffies(SI476X_STATUS_POLL_US));
-}
-
-/**
- * si476x_core_start() - early chip startup function
- * @core: Core device structure
- * @soft: When set, this flag forces "soft" startup, where "soft"
- * power down is the one done by sending appropriate command instead
- * of using reset pin of the tuner
- *
- * Perform required startup sequence to correctly power
- * up the chip and perform initial configuration. It does the
- * following sequence of actions:
- *       1. Claims and enables the power supplies VD and VIO1 required
- *          for I2C interface of the chip operation.
- *       2. Waits for 100us, pulls the reset line up, enables irq,
- *          waits for another 100us as it is specified by the
- *          datasheet.
- *       3. Sends 'POWER_UP' command to the device with all provided
- *          information about power-up parameters.
- *       4. Configures, pin multiplexor, disables digital audio and
- *          configures interrupt sources.
- *
- * The function returns zero in case of succes or negative error code
- * otherwise.
- */
-int si476x_core_start(struct si476x_core *core, bool soft)
-{
-	struct i2c_client *client = core->client;
-	int err;
-
-	if (!soft) {
-		if (gpio_is_valid(core->gpio_reset))
-			gpio_set_value_cansleep(core->gpio_reset, 1);
-
-		if (client->irq)
-			enable_irq(client->irq);
-
-		udelay(100);
-
-		if (!client->irq) {
-			atomic_set(&core->is_alive, 1);
-			si476x_core_schedule_polling_work(core);
-		}
-	} else {
-		if (client->irq)
-			enable_irq(client->irq);
-		else {
-			atomic_set(&core->is_alive, 1);
-			si476x_core_schedule_polling_work(core);
-		}
-	}
-
-	err = si476x_core_cmd_power_up(core,
-				       &core->power_up_parameters);
-
-	if (err < 0) {
-		dev_err(&core->client->dev,
-			"Power up failure(err = %d)\n",
-			err);
-		goto disable_irq;
-	}
-
-	if (client->irq)
-		atomic_set(&core->is_alive, 1);
-
-	err = si476x_core_config_pinmux(core);
-	if (err < 0) {
-		dev_err(&core->client->dev,
-			"Failed to configure pinmux(err = %d)\n",
-			err);
-		goto disable_irq;
-	}
-
-	if (client->irq) {
-		err = regmap_write(core->regmap,
-				   SI476X_PROP_INT_CTL_ENABLE,
-				   SI476X_RDSIEN |
-				   SI476X_STCIEN |
-				   SI476X_CTSIEN);
-		if (err < 0) {
-			dev_err(&core->client->dev,
-				"Failed to configure interrupt sources"
-				"(err = %d)\n", err);
-			goto disable_irq;
-		}
-	}
-
-	return 0;
-
-disable_irq:
-	if (err == -ENODEV)
-		atomic_set(&core->is_alive, 0);
-
-	if (client->irq)
-		disable_irq(client->irq);
-	else
-		cancel_delayed_work_sync(&core->status_monitor);
-
-	if (gpio_is_valid(core->gpio_reset))
-		gpio_set_value_cansleep(core->gpio_reset, 0);
-
-	return err;
-}
-EXPORT_SYMBOL_GPL(si476x_core_start);
-
-/**
- * si476x_core_stop() - chip power-down function
- * @core: Core device structure
- * @soft: When set, function sends a POWER_DOWN command instead of
- * bringing reset line low
- *
- * Power down the chip by performing following actions:
- * 1. Disable IRQ or stop the polling worker
- * 2. Send the POWER_DOWN command if the power down is soft or bring
- *    reset line low if not.
- *
- * The function returns zero in case of succes or negative error code
- * otherwise.
- */
-int si476x_core_stop(struct si476x_core *core, bool soft)
-{
-	int err = 0;
-	atomic_set(&core->is_alive, 0);
-
-	if (soft) {
-		/* TODO: This probably shoud be a configurable option,
-		 * so it is possible to have the chips keep their
-		 * oscillators running
-		 */
-		struct si476x_power_down_args args = {
-			.xosc = false,
-		};
-		err = si476x_core_cmd_power_down(core, &args);
-	}
-
-	/* We couldn't disable those before
-	 * 'si476x_core_cmd_power_down' since we expect to get CTS
-	 * interrupt */
-	if (core->client->irq)
-		disable_irq(core->client->irq);
-	else
-		cancel_delayed_work_sync(&core->status_monitor);
-
-	if (!soft) {
-		if (gpio_is_valid(core->gpio_reset))
-			gpio_set_value_cansleep(core->gpio_reset, 0);
-	}
-	return err;
-}
-EXPORT_SYMBOL_GPL(si476x_core_stop);
-
-/**
- * si476x_core_set_power_state() - set the level at which the power is
- * supplied for the chip.
- * @core: Core device structure
- * @next_state: enum si476x_power_state describing power state to
- *              switch to.
- *
- * Switch on all the required power supplies
- *
- * This function returns 0 in case of suvccess and negative error code
- * otherwise.
- */
-int si476x_core_set_power_state(struct si476x_core *core,
-				enum si476x_power_state next_state)
-{
-	/*
-	   It is not clear form the datasheet if it is possible to
-	   work with device if not all power domains are operational.
-	   So for now the power-up policy is "power-up all the things!"
-	 */
-	int err = 0;
-
-	if (core->power_state == SI476X_POWER_INCONSISTENT) {
-		dev_err(&core->client->dev,
-			"The device in inconsistent power state\n");
-		return -EINVAL;
-	}
-
-	if (next_state != core->power_state) {
-		switch (next_state) {
-		case SI476X_POWER_UP_FULL:
-			err = regulator_bulk_enable(ARRAY_SIZE(core->supplies),
-						    core->supplies);
-			if (err < 0) {
-				core->power_state = SI476X_POWER_INCONSISTENT;
-				break;
-			}
-			/*
-			 * Startup timing diagram recommends to have a
-			 * 100 us delay between enabling of the power
-			 * supplies and turning the tuner on.
-			 */
-			udelay(100);
-
-			err = si476x_core_start(core, false);
-			if (err < 0)
-				goto disable_regulators;
-
-			core->power_state = next_state;
-			break;
-
-		case SI476X_POWER_DOWN:
-			core->power_state = next_state;
-			err = si476x_core_stop(core, false);
-			if (err < 0)
-				core->power_state = SI476X_POWER_INCONSISTENT;
-disable_regulators:
-			err = regulator_bulk_disable(ARRAY_SIZE(core->supplies),
-						     core->supplies);
-			if (err < 0)
-				core->power_state = SI476X_POWER_INCONSISTENT;
-			break;
-		default:
-			BUG();
-		}
-	}
-
-	return err;
-}
-EXPORT_SYMBOL_GPL(si476x_core_set_power_state);
-
-/**
- * si476x_core_report_drainer_stop() - mark the completion of the RDS
- * buffer drain porcess by the worker.
- *
- * @core: Core device structure
- */
-static inline void si476x_core_report_drainer_stop(struct si476x_core *core)
-{
-	mutex_lock(&core->rds_drainer_status_lock);
-	core->rds_drainer_is_working = false;
-	mutex_unlock(&core->rds_drainer_status_lock);
-}
-
-/**
- * si476x_core_start_rds_drainer_once() - start RDS drainer worker if
- * ther is none working, do nothing otherwise
- *
- * @core: Datastructure corresponding to the chip.
- */
-static inline void si476x_core_start_rds_drainer_once(struct si476x_core *core)
-{
-	mutex_lock(&core->rds_drainer_status_lock);
-	if (!core->rds_drainer_is_working) {
-		core->rds_drainer_is_working = true;
-		schedule_work(&core->rds_fifo_drainer);
-	}
-	mutex_unlock(&core->rds_drainer_status_lock);
-}
-/**
- * si476x_drain_rds_fifo() - RDS buffer drainer.
- * @work: struct work_struct being ppassed to the function by the
- * kernel.
- *
- * Drain the contents of the RDS FIFO of
- */
-static void si476x_core_drain_rds_fifo(struct work_struct *work)
-{
-	int err;
-
-	struct si476x_core *core = container_of(work, struct si476x_core,
-						rds_fifo_drainer);
-
-	struct si476x_rds_status_report report;
-
-	si476x_core_lock(core);
-	err = si476x_core_cmd_fm_rds_status(core, true, false, false, &report);
-	if (!err) {
-		int i = report.rdsfifoused;
-		dev_dbg(&core->client->dev,
-			"%d elements in RDS FIFO. Draining.\n", i);
-		for (; i > 0; --i) {
-			err = si476x_core_cmd_fm_rds_status(core, false, false,
-							    (i == 1), &report);
-			if (err < 0)
-				goto unlock;
-
-			kfifo_in(&core->rds_fifo, report.rds,
-				 sizeof(report.rds));
-			dev_dbg(&core->client->dev, "RDS data:\n %*ph\n",
-				(int)sizeof(report.rds), report.rds);
-		}
-		dev_dbg(&core->client->dev, "Drrrrained!\n");
-		wake_up_interruptible(&core->rds_read_queue);
-	}
-
-unlock:
-	si476x_core_unlock(core);
-	si476x_core_report_drainer_stop(core);
-}
-
-/**
- * si476x_core_pronounce_dead()
- *
- * @core: Core device structure
- *
- * Mark the device as being dead and wake up all potentially waiting
- * threads of execution.
- *
- */
-static void si476x_core_pronounce_dead(struct si476x_core *core)
-{
-	dev_info(&core->client->dev, "Core device is dead.\n");
-
-	atomic_set(&core->is_alive, 0);
-
-	/* Wake up al possible waiting processes */
-	wake_up_interruptible(&core->rds_read_queue);
-
-	atomic_set(&core->cts, 1);
-	wake_up(&core->command);
-
-	atomic_set(&core->stc, 1);
-	wake_up(&core->tuning);
-}
-
-/**
- * si476x_core_i2c_xfer()
- *
- * @core: Core device structure
- * @type: Transfer type
- * @buf: Transfer buffer for/with data
- * @count: Transfer buffer size
- *
- * Perfrom and I2C transfer(either read or write) and keep a counter
- * of I/O errors. If the error counter rises above the threshold
- * pronounce device dead.
- *
- * The function returns zero on succes or negative error code on
- * failure.
- */
-int si476x_core_i2c_xfer(struct si476x_core *core,
-		    enum si476x_i2c_type type,
-		    char *buf, int count)
-{
-	static int io_errors_count;
-	int err;
-	if (type == SI476X_I2C_SEND)
-		err = i2c_master_send(core->client, buf, count);
-	else
-		err = i2c_master_recv(core->client, buf, count);
-
-	if (err < 0) {
-		if (io_errors_count++ > SI476X_MAX_IO_ERRORS)
-			si476x_core_pronounce_dead(core);
-	} else {
-		io_errors_count = 0;
-	}
-
-	return err;
-}
-EXPORT_SYMBOL_GPL(si476x_core_i2c_xfer);
-
-/**
- * si476x_get_status()
- * @core: Core device structure
- *
- * Get the status byte of the core device by berforming one byte I2C
- * read.
- *
- * The function returns a status value or a negative error code on
- * error.
- */
-static int si476x_core_get_status(struct si476x_core *core)
-{
-	u8 response;
-	int err = si476x_core_i2c_xfer(core, SI476X_I2C_RECV,
-				  &response, sizeof(response));
-
-	return (err < 0) ? err : response;
-}
-
-/**
- * si476x_get_and_signal_status() - IRQ dispatcher
- * @core: Core device structure
- *
- * Dispatch the arrived interrupt request based on the value of the
- * status byte reported by the tuner.
- *
- */
-static void si476x_core_get_and_signal_status(struct si476x_core *core)
-{
-	int status = si476x_core_get_status(core);
-	if (status < 0) {
-		dev_err(&core->client->dev, "Failed to get status\n");
-		return;
-	}
-
-	if (status & SI476X_CTS) {
-		/* Unfortunately completions could not be used for
-		 * signalling CTS since this flag cannot be cleared
-		 * in status byte, and therefore once it becomes true
-		 * multiple calls to 'complete' would cause the
-		 * commands following the current one to be completed
-		 * before they actually are */
-		dev_dbg(&core->client->dev, "[interrupt] CTSINT\n");
-		atomic_set(&core->cts, 1);
-		wake_up(&core->command);
-	}
-
-	if (status & SI476X_FM_RDS_INT) {
-		dev_dbg(&core->client->dev, "[interrupt] RDSINT\n");
-		si476x_core_start_rds_drainer_once(core);
-	}
-
-	if (status & SI476X_STC_INT) {
-		dev_dbg(&core->client->dev, "[interrupt] STCINT\n");
-		atomic_set(&core->stc, 1);
-		wake_up(&core->tuning);
-	}
-}
-
-static void si476x_core_poll_loop(struct work_struct *work)
-{
-	struct si476x_core *core = SI476X_WORK_TO_CORE(work);
-
-	si476x_core_get_and_signal_status(core);
-
-	if (atomic_read(&core->is_alive))
-		si476x_core_schedule_polling_work(core);
-}
-
-static irqreturn_t si476x_core_interrupt(int irq, void *dev)
-{
-	struct si476x_core *core = dev;
-
-	si476x_core_get_and_signal_status(core);
-
-	return IRQ_HANDLED;
-}
-
-/**
- * si476x_firmware_version_to_revision()
- * @core: Core device structure
- * @major:  Firmware major number
- * @minor1: Firmware first minor number
- * @minor2: Firmware second minor number
- *
- * Convert a chip's firmware version number into an offset that later
- * will be used to as offset in "vtable" of tuner functions
- *
- * This function returns a positive offset in case of success and a -1
- * in case of failure.
- */
-static int si476x_core_fwver_to_revision(struct si476x_core *core,
-					 int func, int major,
-					 int minor1, int minor2)
-{
-	switch (func) {
-	case SI476X_FUNC_FM_RECEIVER:
-		switch (major) {
-		case 5:
-			return SI476X_REVISION_A10;
-		case 8:
-			return SI476X_REVISION_A20;
-		case 10:
-			return SI476X_REVISION_A30;
-		default:
-			goto unknown_revision;
-		}
-	case SI476X_FUNC_AM_RECEIVER:
-		switch (major) {
-		case 5:
-			return SI476X_REVISION_A10;
-		case 7:
-			return SI476X_REVISION_A20;
-		case 9:
-			return SI476X_REVISION_A30;
-		default:
-			goto unknown_revision;
-		}
-	case SI476X_FUNC_WB_RECEIVER:
-		switch (major) {
-		case 3:
-			return SI476X_REVISION_A10;
-		case 5:
-			return SI476X_REVISION_A20;
-		case 7:
-			return SI476X_REVISION_A30;
-		default:
-			goto unknown_revision;
-		}
-	case SI476X_FUNC_BOOTLOADER:
-	default:		/* FALLTHROUG */
-		BUG();
-		return -1;
-	}
-
-unknown_revision:
-	dev_err(&core->client->dev,
-		"Unsupported version of the firmware: %d.%d.%d, "
-		"reverting to A10 comptible functions\n",
-		major, minor1, minor2);
-
-	return SI476X_REVISION_A10;
-}
-
-/**
- * si476x_get_revision_info()
- * @core: Core device structure
- *
- * Get the firmware version number of the device. It is done in
- * following three steps:
- *    1. Power-up the device
- *    2. Send the 'FUNC_INFO' command
- *    3. Powering the device down.
- *
- * The function return zero on success and a negative error code on
- * failure.
- */
-static int si476x_core_get_revision_info(struct si476x_core *core)
-{
-	int rval;
-	struct si476x_func_info info;
-
-	si476x_core_lock(core);
-	rval = si476x_core_set_power_state(core, SI476X_POWER_UP_FULL);
-	if (rval < 0)
-		goto exit;
-
-	rval = si476x_core_cmd_func_info(core, &info);
-	if (rval < 0)
-		goto power_down;
-
-	core->revision = si476x_core_fwver_to_revision(core, info.func,
-						       info.firmware.major,
-						       info.firmware.minor[0],
-						       info.firmware.minor[1]);
-power_down:
-	si476x_core_set_power_state(core, SI476X_POWER_DOWN);
-exit:
-	si476x_core_unlock(core);
-
-	return rval;
-}
-
-bool si476x_core_has_am(struct si476x_core *core)
-{
-	return core->chip_id == SI476X_CHIP_SI4761 ||
-		core->chip_id == SI476X_CHIP_SI4764;
-}
-EXPORT_SYMBOL_GPL(si476x_core_has_am);
-
-bool si476x_core_has_diversity(struct si476x_core *core)
-{
-	return core->chip_id == SI476X_CHIP_SI4764;
-}
-EXPORT_SYMBOL_GPL(si476x_core_has_diversity);
-
-bool si476x_core_is_a_secondary_tuner(struct si476x_core *core)
-{
-	return si476x_core_has_diversity(core) &&
-		(core->diversity_mode == SI476X_PHDIV_SECONDARY_ANTENNA ||
-		 core->diversity_mode == SI476X_PHDIV_SECONDARY_COMBINING);
-}
-EXPORT_SYMBOL_GPL(si476x_core_is_a_secondary_tuner);
-
-bool si476x_core_is_a_primary_tuner(struct si476x_core *core)
-{
-	return si476x_core_has_diversity(core) &&
-		(core->diversity_mode == SI476X_PHDIV_PRIMARY_ANTENNA ||
-		 core->diversity_mode == SI476X_PHDIV_PRIMARY_COMBINING);
-}
-EXPORT_SYMBOL_GPL(si476x_core_is_a_primary_tuner);
-
-bool si476x_core_is_in_am_receiver_mode(struct si476x_core *core)
-{
-	return si476x_core_has_am(core) &&
-		(core->power_up_parameters.func == SI476X_FUNC_AM_RECEIVER);
-}
-EXPORT_SYMBOL_GPL(si476x_core_is_in_am_receiver_mode);
-
-bool si476x_core_is_powered_up(struct si476x_core *core)
-{
-	return core->power_state == SI476X_POWER_UP_FULL;
-}
-EXPORT_SYMBOL_GPL(si476x_core_is_powered_up);
-
-static int si476x_core_probe(struct i2c_client *client,
-			     const struct i2c_device_id *id)
-{
-	int rval;
-	struct si476x_core          *core;
-	struct si476x_platform_data *pdata;
-	struct mfd_cell *cell;
-	int              cell_num;
-
-	core = devm_kzalloc(&client->dev, sizeof(*core), GFP_KERNEL);
-	if (!core) {
-		dev_err(&client->dev,
-			"failed to allocate 'struct si476x_core'\n");
-		return -ENOMEM;
-	}
-	core->client = client;
-
-	core->regmap = devm_regmap_init_si476x(core);
-	if (IS_ERR(core->regmap)) {
-		rval = PTR_ERR(core->regmap);
-		dev_err(&client->dev,
-			"Failed to allocate register map: %d\n",
-			rval);
-		return rval;
-	}
-
-	i2c_set_clientdata(client, core);
-
-	atomic_set(&core->is_alive, 0);
-	core->power_state = SI476X_POWER_DOWN;
-
-	pdata = client->dev.platform_data;
-	if (pdata) {
-		memcpy(&core->power_up_parameters,
-		       &pdata->power_up_parameters,
-		       sizeof(core->power_up_parameters));
-
-		core->gpio_reset = -1;
-		if (gpio_is_valid(pdata->gpio_reset)) {
-			rval = gpio_request(pdata->gpio_reset, "si476x reset");
-			if (rval) {
-				dev_err(&client->dev,
-					"Failed to request gpio: %d\n", rval);
-				return rval;
-			}
-			core->gpio_reset = pdata->gpio_reset;
-			gpio_direction_output(core->gpio_reset, 0);
-		}
-
-		core->diversity_mode = pdata->diversity_mode;
-		memcpy(&core->pinmux, &pdata->pinmux,
-		       sizeof(struct si476x_pinmux));
-	} else {
-		dev_err(&client->dev, "No platform data provided\n");
-		return -EINVAL;
-	}
-
-	core->supplies[0].supply = "vd";
-	core->supplies[1].supply = "va";
-	core->supplies[2].supply = "vio1";
-	core->supplies[3].supply = "vio2";
-
-	rval = devm_regulator_bulk_get(&client->dev,
-				       ARRAY_SIZE(core->supplies),
-				       core->supplies);
-	if (rval) {
-		dev_err(&client->dev, "Failet to gett all of the regulators\n");
-		goto free_gpio;
-	}
-
-	mutex_init(&core->cmd_lock);
-	init_waitqueue_head(&core->command);
-	init_waitqueue_head(&core->tuning);
-
-	rval = kfifo_alloc(&core->rds_fifo,
-			   SI476X_DRIVER_RDS_FIFO_DEPTH *
-			   sizeof(struct v4l2_rds_data),
-			   GFP_KERNEL);
-	if (rval) {
-		dev_err(&client->dev, "Could not alloate the FIFO\n");
-		goto free_gpio;
-	}
-	mutex_init(&core->rds_drainer_status_lock);
-	init_waitqueue_head(&core->rds_read_queue);
-	INIT_WORK(&core->rds_fifo_drainer, si476x_core_drain_rds_fifo);
-
-	if (client->irq) {
-		rval = devm_request_threaded_irq(&client->dev,
-						 client->irq, NULL,
-						 si476x_core_interrupt,
-						 IRQF_TRIGGER_FALLING,
-						 client->name, core);
-		if (rval < 0) {
-			dev_err(&client->dev, "Could not request IRQ %d\n",
-				client->irq);
-			goto free_kfifo;
-		}
-		disable_irq(client->irq);
-		dev_dbg(&client->dev, "IRQ requested.\n");
-
-		core->rds_fifo_depth = 20;
-	} else {
-		INIT_DELAYED_WORK(&core->status_monitor,
-				  si476x_core_poll_loop);
-		dev_info(&client->dev,
-			 "No IRQ number specified, will use polling\n");
-
-		core->rds_fifo_depth = 5;
-	}
-
-	core->chip_id = id->driver_data;
-
-	rval = si476x_core_get_revision_info(core);
-	if (rval < 0) {
-		rval = -ENODEV;
-		goto free_kfifo;
-	}
-
-	cell_num = 0;
-
-	cell = &core->cells[SI476X_RADIO_CELL];
-	cell->name = "si476x-radio";
-	cell_num++;
-
-#ifdef CONFIG_SND_SOC_SI476X
-	if ((core->chip_id == SI476X_CHIP_SI4761 ||
-	     core->chip_id == SI476X_CHIP_SI4764)	&&
-	    core->pinmux.dclk == SI476X_DCLK_DAUDIO     &&
-	    core->pinmux.dfs  == SI476X_DFS_DAUDIO      &&
-	    core->pinmux.dout == SI476X_DOUT_I2S_OUTPUT &&
-	    core->pinmux.xout == SI476X_XOUT_TRISTATE) {
-		cell = &core->cells[SI476X_CODEC_CELL];
-		cell->name          = "si476x-codec";
-		cell_num++;
-	}
-#endif
-	rval = mfd_add_devices(&client->dev,
-			       (client->adapter->nr << 8) + client->addr,
-			       core->cells, cell_num,
-			       NULL, 0, NULL);
-	if (!rval)
-		return 0;
-
-free_kfifo:
-	kfifo_free(&core->rds_fifo);
-
-free_gpio:
-	if (gpio_is_valid(core->gpio_reset))
-		gpio_free(core->gpio_reset);
-
-	return rval;
-}
-
-static int si476x_core_remove(struct i2c_client *client)
-{
-	struct si476x_core *core = i2c_get_clientdata(client);
-
-	si476x_core_pronounce_dead(core);
-	mfd_remove_devices(&client->dev);
-
-	if (client->irq)
-		disable_irq(client->irq);
-	else
-		cancel_delayed_work_sync(&core->status_monitor);
-
-	kfifo_free(&core->rds_fifo);
-
-	if (gpio_is_valid(core->gpio_reset))
-		gpio_free(core->gpio_reset);
-
-	return 0;
-}
-
-
-static const struct i2c_device_id si476x_id[] = {
-	{ "si4761", SI476X_CHIP_SI4761 },
-	{ "si4764", SI476X_CHIP_SI4764 },
-	{ "si4768", SI476X_CHIP_SI4768 },
-	{ },
-};
-MODULE_DEVICE_TABLE(i2c, si476x_id);
-
-static struct i2c_driver si476x_core_driver = {
-	.driver		= {
-		.name	= "si476x-core",
-		.owner  = THIS_MODULE,
-	},
-	.probe		= si476x_core_probe,
-	.remove         = si476x_core_remove,
-	.id_table       = si476x_id,
-};
-module_i2c_driver(si476x_core_driver);
-
-
-MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>");
-MODULE_DESCRIPTION("Si4761/64/68 AM/FM MFD core device driver");
-MODULE_LICENSE("GPL");

drivers/mfd/si476x-prop.c

@@ -1,242 +0,0 @@
-/*
- * drivers/mfd/si476x-prop.c -- Subroutines to access
- * properties of si476x chips
- *
- * Copyright (C) 2012 Innovative Converged Devices(ICD)
- * Copyright (C) 2013 Andrey Smirnov
- *
- * Author: Andrey Smirnov <andrew.smirnov@gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- */
-#include <linux/module.h>
-
-#include <media/si476x.h>
-#include <linux/mfd/si476x-core.h>
-
-struct si476x_property_range {
-	u16 low, high;
-};
-
-static bool si476x_core_element_is_in_array(u16 element,
-					    const u16 array[],
-					    size_t size)
-{
-	int i;
-
-	for (i = 0; i < size; i++)
-		if (element == array[i])
-			return true;
-
-	return false;
-}
-
-static bool si476x_core_element_is_in_range(u16 element,
-					    const struct si476x_property_range range[],
-					    size_t size)
-{
-	int i;
-
-	for (i = 0; i < size; i++)
-		if (element <= range[i].high && element >= range[i].low)
-			return true;
-
-	return false;
-}
-
-static bool si476x_core_is_valid_property_a10(struct si476x_core *core,
-					      u16 property)
-{
-	static const u16 valid_properties[] = {
-		0x0000,
-		0x0500, 0x0501,
-		0x0600,
-		0x0709, 0x070C, 0x070D, 0x70E, 0x710,
-		0x0718,
-		0x1207, 0x1208,
-		0x2007,
-		0x2300,
-	};
-
-	static const struct si476x_property_range valid_ranges[] = {
-		{ 0x0200, 0x0203 },
-		{ 0x0300, 0x0303 },
-		{ 0x0400, 0x0404 },
-		{ 0x0700, 0x0707 },
-		{ 0x1100, 0x1102 },
-		{ 0x1200, 0x1204 },
-		{ 0x1300, 0x1306 },
-		{ 0x2000, 0x2005 },
-		{ 0x2100, 0x2104 },
-		{ 0x2106, 0x2106 },
-		{ 0x2200, 0x220E },
-		{ 0x3100, 0x3104 },
-		{ 0x3207, 0x320F },
-		{ 0x3300, 0x3304 },
-		{ 0x3500, 0x3517 },
-		{ 0x3600, 0x3617 },
-		{ 0x3700, 0x3717 },
-		{ 0x4000, 0x4003 },
-	};
-
-	return	si476x_core_element_is_in_range(property, valid_ranges,
-						ARRAY_SIZE(valid_ranges)) ||
-		si476x_core_element_is_in_array(property, valid_properties,
-						ARRAY_SIZE(valid_properties));
-}
-
-static bool si476x_core_is_valid_property_a20(struct si476x_core *core,
-					      u16 property)
-{
-	static const u16 valid_properties[] = {
-		0x071B,
-		0x1006,
-		0x2210,
-		0x3401,
-	};
-
-	static const struct si476x_property_range valid_ranges[] = {
-		{ 0x2215, 0x2219 },
-	};
-
-	return	si476x_core_is_valid_property_a10(core, property) ||
-		si476x_core_element_is_in_range(property, valid_ranges,
-						ARRAY_SIZE(valid_ranges))  ||
-		si476x_core_element_is_in_array(property, valid_properties,
-						ARRAY_SIZE(valid_properties));
-}
-
-static bool si476x_core_is_valid_property_a30(struct si476x_core *core,
-					      u16 property)
-{
-	static const u16 valid_properties[] = {
-		0x071C, 0x071D,
-		0x1007, 0x1008,
-		0x220F, 0x2214,
-		0x2301,
-		0x3105, 0x3106,
-		0x3402,
-	};
-
-	static const struct si476x_property_range valid_ranges[] = {
-		{ 0x0405, 0x0411 },
-		{ 0x2008, 0x200B },
-		{ 0x2220, 0x2223 },
-		{ 0x3100, 0x3106 },
-	};
-
-	return	si476x_core_is_valid_property_a20(core, property) ||
-		si476x_core_element_is_in_range(property, valid_ranges,
-						ARRAY_SIZE(valid_ranges)) ||
-		si476x_core_element_is_in_array(property, valid_properties,
-						ARRAY_SIZE(valid_properties));
-}
-
-typedef bool (*valid_property_pred_t) (struct si476x_core *, u16);
-
-static bool si476x_core_is_valid_property(struct si476x_core *core,
-					  u16 property)
-{
-	static const valid_property_pred_t is_valid_property[] = {
-		[SI476X_REVISION_A10] = si476x_core_is_valid_property_a10,
-		[SI476X_REVISION_A20] = si476x_core_is_valid_property_a20,
-		[SI476X_REVISION_A30] = si476x_core_is_valid_property_a30,
-	};
-
-	BUG_ON(core->revision > SI476X_REVISION_A30 ||
-	       core->revision == -1);
-	return is_valid_property[core->revision](core, property);
-}
-
-
-static bool si476x_core_is_readonly_property(struct si476x_core *core,
-					     u16 property)
-{
-	BUG_ON(core->revision > SI476X_REVISION_A30 ||
-	       core->revision == -1);
-
-	switch (core->revision) {
-	case SI476X_REVISION_A10:
-		return (property == 0x3200);
-	case SI476X_REVISION_A20:
-		return (property == 0x1006 ||
-			property == 0x2210 ||
-			property == 0x3200);
-	case SI476X_REVISION_A30:
-		return false;
-	}
-
-	return false;
-}
-
-static bool si476x_core_regmap_readable_register(struct device *dev,
-						 unsigned int reg)
-{
-	struct i2c_client *client = to_i2c_client(dev);
-	struct si476x_core *core = i2c_get_clientdata(client);
-
-	return si476x_core_is_valid_property(core, (u16) reg);
-
-}
-
-static bool si476x_core_regmap_writable_register(struct device *dev,
-						 unsigned int reg)
-{
-	struct i2c_client *client = to_i2c_client(dev);
-	struct si476x_core *core = i2c_get_clientdata(client);
-
-	return si476x_core_is_valid_property(core, (u16) reg) &&
-		!si476x_core_is_readonly_property(core, (u16) reg);
-}
-
-
-static int si476x_core_regmap_write(void *context, unsigned int reg,
-				    unsigned int val)
-{
-	return si476x_core_cmd_set_property(context, reg, val);
-}
-
-static int si476x_core_regmap_read(void *context, unsigned int reg,
-				   unsigned *val)
-{
-	struct si476x_core *core = context;
-	int err;
-
-	err = si476x_core_cmd_get_property(core, reg);
-	if (err < 0)
-		return err;
-
-	*val = err;
-
-	return 0;
-}
-
-
-static const struct regmap_config si476x_regmap_config = {
-	.reg_bits = 16,
-	.val_bits = 16,
-
-	.max_register = 0x4003,
-
-	.writeable_reg = si476x_core_regmap_writable_register,
-	.readable_reg = si476x_core_regmap_readable_register,
-
-	.reg_read = si476x_core_regmap_read,
-	.reg_write = si476x_core_regmap_write,
-
-	.cache_type = REGCACHE_RBTREE,
-};
-
-struct regmap *devm_regmap_init_si476x(struct si476x_core *core)
-{
-	return devm_regmap_init(&core->client->dev, NULL,
-				core, &si476x_regmap_config);
-}
-EXPORT_SYMBOL_GPL(devm_regmap_init_si476x);

include/media/si476x.h

@@ -0,0 +1,37 @@
+/*
+ * include/media/si476x.h -- Common definitions for si476x driver
+ *
+ * Copyright (C) 2012 Innovative Converged Devices(ICD)
+ * Copyright (C) 2013 Andrey Smirnov
+ *
+ * Author: Andrey Smirnov <andrew.smirnov@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ */
+
+#ifndef SI476X_H
+#define SI476X_H
+
+#include <linux/types.h>
+#include <linux/videodev2.h>
+
+#include <linux/mfd/si476x-reports.h>
+
+enum si476x_ctrl_id {
+	V4L2_CID_SI476X_RSSI_THRESHOLD	= (V4L2_CID_USER_SI476X_BASE + 1),
+	V4L2_CID_SI476X_SNR_THRESHOLD	= (V4L2_CID_USER_SI476X_BASE + 2),
+	V4L2_CID_SI476X_MAX_TUNE_ERROR	= (V4L2_CID_USER_SI476X_BASE + 3),
+	V4L2_CID_SI476X_HARMONICS_COUNT	= (V4L2_CID_USER_SI476X_BASE + 4),
+	V4L2_CID_SI476X_DIVERSITY_MODE	= (V4L2_CID_USER_SI476X_BASE + 5),
+	V4L2_CID_SI476X_INTERCHIP_LINK	= (V4L2_CID_USER_SI476X_BASE + 6),
+};
+
+#endif /* SI476X_H*/