Hi Andrey!
Thanks for posting this driver. One request for the future: please split this
patch up in smaller pieces: one for each c source for example. That makes it
easier to review.
On Fri September 14 2012 00:40:11 Andrey Smirnov wrote:
> This patch adds a core driver for Silicon Laboratories Si476x series
> of AM/FM tuner chips. The driver as a whole is implemented as an MFD device
> and this patch adds a core portion of it that provides all the necessary
> functionality to the two other drivers that represent radio and audio
> codec subsystems of the chip.
>
> Signed-off-by: Andrey Smirnov <andrey.smir...@convergeddevices.net>
> ---
> drivers/mfd/Kconfig | 14 +
> drivers/mfd/Makefile | 3 +
> drivers/mfd/si476x-cmd.c | 1509
> +++++++++++++++++++++++++++++++++++++++
> drivers/mfd/si476x-i2c.c | 1033 +++++++++++++++++++++++++++
> drivers/mfd/si476x-prop.c | 477 +++++++++++++
> include/linux/mfd/si476x-core.h | 522 ++++++++++++++
> include/media/si476x.h | 455 ++++++++++++
> 7 files changed, 4013 insertions(+)
> create mode 100644 drivers/mfd/si476x-cmd.c
> create mode 100644 drivers/mfd/si476x-i2c.c
> create mode 100644 drivers/mfd/si476x-prop.c
> create mode 100644 include/linux/mfd/si476x-core.h
> create mode 100644 include/media/si476x.h
>
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index b1a1462..3fab06d 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -895,6 +895,20 @@ config MFD_WL1273_CORE
> driver connects the radio-wl1273 V4L2 module and the wl1273
> audio codec.
>
> +config MFD_SI476X_CORE
> + tristate "Support for Silicon Laboratories 4761/64/68 AM/FM radio."
> + depends on I2C
> + select MFD_CORE
> + default n
> + help
> + This is the core driver for the SI476x series of AM/FM radio. This MFD
> + driver connects the radio-si476x V4L2 module and the si476x
> + audio codec.
> +
> + To compile this driver as a module, choose M here: the
> + module will be called si476x-core.
> +
> +
> config MFD_OMAP_USB_HOST
> bool "Support OMAP USBHS core driver"
> depends on USB_EHCI_HCD_OMAP || USB_OHCI_HCD_OMAP3
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index 79dd22d..942257b 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -132,3 +132,6 @@ obj-$(CONFIG_MFD_RC5T583) += rc5t583.o rc5t583-irq.o
> obj-$(CONFIG_MFD_SEC_CORE) += sec-core.o sec-irq.o
> obj-$(CONFIG_MFD_ANATOP) += anatop-mfd.o
> obj-$(CONFIG_MFD_LM3533) += lm3533-core.o lm3533-ctrlbank.o
> +
> +si476x-core-objs := si476x-cmd.o si476x-prop.o si476x-i2c.o
> +obj-$(CONFIG_MFD_SI476X_CORE) += si476x-core.o
> diff --git a/drivers/mfd/si476x-cmd.c b/drivers/mfd/si476x-cmd.c
> new file mode 100644
> index 0000000..defe1f5
> --- /dev/null
> +++ b/drivers/mfd/si476x-cmd.c
> @@ -0,0 +1,1509 @@
> +/*
> + * include/media/si476x-cmd.c -- Subroutines implementing command
> + * protocol of si476x series of chips
> + *
> + * Copyright (C) 2012 Innovative Converged Devices(ICD)
> + *
> + * Author: Andrey Smirnov <andrey.smir...@convergeddevices.net>
> + *
> + * 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) {
It's much easier to reverse the test:
if (core->revision == SI476X_REVISION_A10)
return -EIO;
It reduces the indentation.
> + err = si476x_i2c_xfer(core, SI476X_I2C_RECV,
> + buffer, sizeof(buffer));
> + if (err == sizeof(buffer)) {
Ditto for the test above.
Add an err = -EINVAL line here, then you don't need to add it for all the cases
below.
> + 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;
> +}
> +
> +/**
> + * __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 __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;
Why goto exit? There is no clean up after the exit label, so just return
immediately. Ditto for all the other goto exit's in this function.
> + }
> +
> + if (!client->adapter) {
> + err = -ENODEV;
> + goto exit;
> + }
> +
> + /* First send the command and its arguments */
> + data[0] = command;
> + memcpy(&data[1], args, argn);
> + DBG_BUFFER(&client->dev, "Command:\n", data, argn + 1);
> +
> + err = si476x_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 (!wait_event_timeout(core->command,
> + atomic_read(&core->cts),
> + usecs_to_jiffies(usecs) + 1))
> + dev_warn(&core->client->dev,
> + "(%s) [CMD 0x%02x] Device took too much time to
> answer.\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 zros 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_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;
> + }
> + DBG_BUFFER(&client->dev, "Response:\n", resp, respn);
> +
> + err = 0;
> +
> + if (resp[0] & SI476X_ERR) {
> + dev_err(&core->client->dev, "Chip set error flag\n");
> + err = si476x_core_parse_and_nag_about_error(core);
> + goto exit;
> + }
> +
> + if (!(resp[0] & SI476X_CTS))
> + err = -EBUSY;
> +exit:
> + return err;
> +}
> +
> +#define CORE_SEND_COMMAND(core, cmd, args, resp, timeout) \
> + __core_send_command(core, cmd, args, \
> + ARRAY_SIZE(args), \
> + resp, ARRAY_SIZE(resp), \
> + timeout)
> +
> +
> +static int __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 (*clear_stcint) (struct si476x_core *core))
> +{
> + int err;
> +
> + atomic_set(&core->stc, 0);
> + err = __core_send_command(core, cmd, args, argn,
> + resp, respn,
> + atomic_read(&core->timeouts.command));
> + if (!err) {
Invert the test to simplify indentation.
> + if (!wait_event_timeout(core->tuning,
> + atomic_read(&core->stc),
> + usecs_to_jiffies(atomic_read(&core->timeouts.tune)) + 1)) {
Weird indentation above. Indent the arguments more to the right.
> + dev_warn(&core->client->dev,
> + "%s: Device took too much time "
> + "to answer (%d usec).\n",
> + __func__,
> + atomic_read(&core->timeouts.tune));
> + err = -ETIMEDOUT;
> + } else {
> + err = clear_stcint(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
typo: success
> + * 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 = __core_send_command(core, CMD_FUNC_INFO,
> + NULL, 0,
> + resp, ARRAY_SIZE(resp),
> + atomic_read(&core->timeouts.command));
> +
> + 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 CORE_SEND_COMMAND(core, CMD_SET_PROPERTY,
> + args, resp,
> + atomic_read(&core->timeouts.command));
> +}
> +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 = CORE_SEND_COMMAND(core, CMD_GET_PROPERTY,
> + args, resp,
> + atomic_read(&core->timeouts.command));
> + 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 CORE_SEND_COMMAND(core, CMD_DIG_AUDIO_PIN_CFG,
> + args, resp,
> + atomic_read(&core->timeouts.command));
> +}
> +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 CORE_SEND_COMMAND(core, CMD_ZIF_PIN_CFG,
> + args, resp,
> + atomic_read(&core->timeouts.command));
> +}
> +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 CORE_SEND_COMMAND(core, CMD_IC_LINK_GPO_CTL_PIN_CFG,
> + args, resp,
> + atomic_read(&core->timeouts.command));
> +}
> +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 CORE_SEND_COMMAND(core, CMD_ANA_AUDIO_PIN_CFG,
> + args, resp,
> + atomic_read(&core->timeouts.command));
> +}
> +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 CORE_SEND_COMMAND(core, CMD_INTB_PIN_CFG,
> + args, resp,
> + atomic_read(&core->timeouts.command));
> +}
> +
> +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 CORE_SEND_COMMAND(core, CMD_INTB_PIN_CFG,
> + args, resp,
> + atomic_read(&core->timeouts.command));
> +}
> +
> +
> +
> +/**
> + * si476x_cmd_am_rsq_status - send 'FM_TUNE_FREQ' 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 = CORE_SEND_COMMAND(core, CMD_AM_RSQ_STATUS,
> + args, resp,
> + atomic_read(&core->timeouts.command));
> +
> + if (report) {
> + 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 = CORE_SEND_COMMAND(core, CMD_FM_ACF_STATUS,
> + args, resp,
> + atomic_read(&core->timeouts.command));
> +
> + if (!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 = CORE_SEND_COMMAND(core, CMD_AM_ACF_STATUS,
> + args, resp,
> + atomic_read(&core->timeouts.command));
> +
> + if (!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);
> +
> +static inline int __fm_clear_stcint(struct si476x_core *core)
> +{
> + struct si476x_rsq_status_args args = {
> + .primary = false,
> + .rsqack = false,
> + .attune = false,
> + .cancel = false,
> + .stcack = true,
> + };
> + return si476x_core_cmd_fm_rsq_status(core, &args, NULL);
> +}
> +
> +static inline int __am_clear_stcint(struct si476x_core *core)
> +{
> + struct si476x_rsq_status_args args = {
> + .primary = false,
> + .rsqack = false,
> + .attune = false,
> + .cancel = false,
> + .stcack = true,
> + };
> + return si476x_core_cmd_am_rsq_status(core, &args, NULL);
> +}
> +
> +
> +
> +/**
> + * 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 __cmd_tune_seek_freq(core, CMD_FM_SEEK_START,
> + args, sizeof(args), resp, sizeof(resp),
> + __fm_clear_stcint);
> +}
> +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 = CORE_SEND_COMMAND(core, CMD_FM_RDS_STATUS,
> + args, resp,
> + atomic_read(&core->timeouts.command));
> +
> + if (!err && report) {
> + 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;
> +}
> +
> +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 = CORE_SEND_COMMAND(core, CMD_FM_RDS_BLOCKCOUNT,
> + args, resp,
> + atomic_read(&core->timeouts.command));
> +
> + 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 CORE_SEND_COMMAND(core, CMD_FM_PHASE_DIVERSITY,
> + args, resp,
> + atomic_read(&core->timeouts.command));
> +}
> +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 = __core_send_command(core, CMD_FM_PHASE_DIV_STATUS,
> + NULL, 0,
> + resp, ARRAY_SIZE(resp),
> + atomic_read(&core->timeouts.command));
> +
> + 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 __cmd_tune_seek_freq(core, CMD_AM_SEEK_START,
> + args, sizeof(args), resp, sizeof(resp),
> + __am_clear_stcint);
> +}
> +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 CORE_SEND_COMMAND(core, CMD_POWER_UP,
> + args, resp,
> + atomic_read(&core->timeouts.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 CORE_SEND_COMMAND(core, CMD_POWER_UP,
> + args, resp,
> + atomic_read(&core->timeouts.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 __core_send_command(core, CMD_POWER_DOWN,
> + NULL, 0,
> + resp, ARRAY_SIZE(resp),
> + atomic_read(&core->timeouts.command));
> +}
> +
> +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 CORE_SEND_COMMAND(core, CMD_POWER_DOWN,
> + args, resp,
> + atomic_read(&core->timeouts.command));
> +}
> +
> +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 __cmd_tune_seek_freq(core, CMD_AM_TUNE_FREQ, args, sizeof(args),
> + resp, sizeof(resp), __am_clear_stcint);
> +}
> +
> +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 __cmd_tune_seek_freq(core, CMD_AM_TUNE_FREQ, args, sizeof(args),
> + resp, sizeof(resp), __am_clear_stcint);
> +}
> +
> +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 = CORE_SEND_COMMAND(core, CMD_FM_RSQ_STATUS,
> + args, resp,
> + atomic_read(&core->timeouts.command));
> +
> + if (report && !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 = CORE_SEND_COMMAND(core, CMD_FM_RSQ_STATUS,
> + args, resp,
> + atomic_read(&core->timeouts.command));
> +
> + if (report && !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 = CORE_SEND_COMMAND(core, CMD_FM_RSQ_STATUS,
> + args, resp,
> + atomic_read(&core->timeouts.command));
> +
> + if (report && !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 __cmd_tune_seek_freq(core, CMD_FM_TUNE_FREQ, args, sizeof(args),
> + resp, sizeof(resp), __fm_clear_stcint);
> +}
> +
> +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 __cmd_tune_seek_freq(core, CMD_FM_TUNE_FREQ, args, sizeof(args),
> + resp, sizeof(resp), __fm_clear_stcint);
> +}
> +
> +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 = __core_send_command(core, CMD_AGC_STATUS,
> + NULL, 0,
> + resp, ARRAY_SIZE(resp),
> + atomic_read(&core->timeouts.command));
> + if (!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 = __core_send_command(core, CMD_AGC_STATUS,
> + NULL, 0,
> + resp, ARRAY_SIZE(resp),
> + atomic_read(&core->timeouts.command));
> + if (!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;
> +}
> +
> +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);
> +
> +
> +
Andrey, you should look at the drivers/media/radio/si4713-i2c.c source.
It is for the same chip family and is much, much smaller.
See if you can use some of the code that's there.
Regards,
Hans
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