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    Subject[PATCH 01/12] mfd: Add commands abstraction layer for SI476X MFD
    Date
    From: Andrey Smirnov <andreysm@charmander.(none)>

    This patch adds all the functions used for exchanging commands with
    the chip.

    Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
    Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
    ---
    drivers/mfd/si476x-cmd.c | 1553 ++++++++++++++++++++++++++++++++++++++++++++++
    1 file changed, 1553 insertions(+)
    create mode 100644 drivers/mfd/si476x-cmd.c

    diff --git a/drivers/mfd/si476x-cmd.c b/drivers/mfd/si476x-cmd.c
    new file mode 100644
    index 0000000..de48b4e
    --- /dev/null
    +++ b/drivers/mfd/si476x-cmd.c
    @@ -0,0 +1,1553 @@
    +/*
    + * 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 <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");
    --
    1.7.10.4


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