Revert "[media] mfd: Add commands abstraction layer for SI476X MFD"

This reverts commit 626b67c1ad90b450e0afbd1c277fd81ad64c5539.

Requested-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

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");