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Message-ID: <YUsLfZrnX2hq4FGV@google.com>
Date: Wed, 22 Sep 2021 11:54:53 +0100
From: Lee Jones <lee.jones@...aro.org>
To: Luka Kovacic <luka.kovacic@...tura.hr>
Cc: linux-doc@...r.kernel.org, linux-leds@...r.kernel.org,
devicetree@...r.kernel.org, linux-hwmon@...r.kernel.org,
linux-kernel@...r.kernel.org, geert+renesas@...der.be,
Max.Merchel@...group.com, linux@...pel-privat.de, daniel@...f.com,
shawnguo@...nel.org, sam@...nborg.org, arnd@...db.de,
krzysztof.kozlowski@...onical.com, pavo.banicevic@...tura.hr,
corbet@....net, pavel@....cz, robh+dt@...nel.org,
linux@...ck-us.net, jdelvare@...e.com, goran.medic@...tura.hr,
luka.perkov@...tura.hr, robert.marko@...tura.hr
Subject: Re: [PATCH v9 2/7] drivers: mfd: Add a driver for IEI WT61P803
PUZZLE MCU
Greg,
Would you be kind enough to take a look at the SYS imp. please?
I've marked the start with:
###########################################
###########################################
On Tue, 24 Aug 2021, Luka Kovacic wrote:
> Add a driver for the IEI WT61P803 PUZZLE microcontroller, used in some
> IEI Puzzle series devices. The microcontroller controls system power,
> temperature sensors, fans and LEDs.
>
> This driver implements the core functionality for device communication
> over the system serial (serdev bus). It handles MCU messages and the
> internal MCU properties. Some properties can be managed over sysfs.
>
> Signed-off-by: Luka Kovacic <luka.kovacic@...tura.hr>
> Signed-off-by: Pavo Banicevic <pavo.banicevic@...tura.hr>
> Cc: Luka Perkov <luka.perkov@...tura.hr>
> Cc: Robert Marko <robert.marko@...tura.hr>
> ---
> drivers/mfd/Kconfig | 8 +
> drivers/mfd/Makefile | 1 +
> drivers/mfd/iei-wt61p803-puzzle.c | 908 ++++++++++++++++++++++++
> include/linux/mfd/iei-wt61p803-puzzle.h | 66 ++
> 4 files changed, 983 insertions(+)
> create mode 100644 drivers/mfd/iei-wt61p803-puzzle.c
> create mode 100644 include/linux/mfd/iei-wt61p803-puzzle.h
>
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index 6a3fd2d75f96..c2183eb0775f 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -2170,6 +2170,14 @@ config SGI_MFD_IOC3
> If you have an SGI Origin, Octane, or a PCI IOC3 card,
> then say Y. Otherwise say N.
>
> +config MFD_IEI_WT61P803_PUZZLE
> + tristate "IEI WT61P803 PUZZLE MCU driver"
> + depends on SERIAL_DEV_BUS
> + help
> + IEI WT61P803 PUZZLE is a system power management microcontroller
> + used for fan control, temperature sensor reading, LED control
> + and system identification.
> +
> config MFD_INTEL_M10_BMC
> tristate "Intel MAX 10 Board Management Controller"
> depends on SPI_MASTER
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index 8116c19d5fd4..42b9767ec37a 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -236,6 +236,7 @@ obj-$(CONFIG_MFD_DLN2) += dln2.o
> obj-$(CONFIG_MFD_RT4831) += rt4831.o
> obj-$(CONFIG_MFD_RT5033) += rt5033.o
> obj-$(CONFIG_MFD_SKY81452) += sky81452.o
> +obj-$(CONFIG_MFD_IEI_WT61P803_PUZZLE) += iei-wt61p803-puzzle.o
>
> intel-soc-pmic-objs := intel_soc_pmic_core.o intel_soc_pmic_crc.o
> obj-$(CONFIG_INTEL_SOC_PMIC) += intel-soc-pmic.o
> diff --git a/drivers/mfd/iei-wt61p803-puzzle.c b/drivers/mfd/iei-wt61p803-puzzle.c
> new file mode 100644
> index 000000000000..596ecbc65627
> --- /dev/null
> +++ b/drivers/mfd/iei-wt61p803-puzzle.c
> @@ -0,0 +1,908 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/* IEI WT61P803 PUZZLE MCU Driver
This breaks coding standard conventions.
top line should be empty.
Place a '\n' below it too please.
> + * System management microcontroller for fan control, temperature sensor reading,
> + * LED control and system identification on IEI Puzzle series ARM-based appliances.
> + *
> + * Copyright (C) 2020 Sartura Ltd.
> + * Author: Luka Kovacic <luka.kovacic@...tura.hr>
> + */
> +
> +#include <linux/atomic.h>
> +#include <linux/delay.h>
> +#include <linux/export.h>
> +#include <linux/init.h>
> +#include <linux/kernel.h>
> +#include <linux/mfd/core.h>
> +#include <linux/mfd/iei-wt61p803-puzzle.h>
> +#include <linux/mod_devicetable.h>
> +#include <linux/module.h>
> +#include <linux/of_platform.h>
> +#include <linux/property.h>
> +#include <linux/sched.h>
> +#include <linux/serdev.h>
> +#include <linux/slab.h>
> +#include <linux/sysfs.h>
> +#include <asm/unaligned.h>
Are you 100% sure all of these are in use?
> +/* start, payload and XOR checksum at end */
> +#define IEI_WT61P803_PUZZLE_MAX_COMMAND_LENGTH (1 + 20 + 1)
> +#define IEI_WT61P803_PUZZLE_RESP_BUF_SIZE 512
> +
> +#define IEI_WT61P803_PUZZLE_MAC_LENGTH 17
> +#define IEI_WT61P803_PUZZLE_SN_LENGTH 36
> +#define IEI_WT61P803_PUZZLE_VERSION_LENGTH 6
> +#define IEI_WT61P803_PUZZLE_BUILD_INFO_LENGTH 16
> +#define IEI_WT61P803_PUZZLE_PROTOCOL_VERSION_LENGTH 8
> +#define IEI_WT61P803_PUZZLE_NB_MAC 8
> +
> +/* Use HZ as a timeout value throughout the driver */
> +#define IEI_WT61P803_PUZZLE_GENERAL_TIMEOUT HZ
> +
> +enum iei_wt61p803_puzzle_attribute_type {
> + IEI_WT61P803_PUZZLE_VERSION,
> + IEI_WT61P803_PUZZLE_BUILD_INFO,
> + IEI_WT61P803_PUZZLE_BOOTLOADER_MODE,
> + IEI_WT61P803_PUZZLE_PROTOCOL_VERSION,
> + IEI_WT61P803_PUZZLE_SERIAL_NUMBER,
> + IEI_WT61P803_PUZZLE_MAC_ADDRESS,
> + IEI_WT61P803_PUZZLE_AC_RECOVERY_STATUS,
> + IEI_WT61P803_PUZZLE_POWER_LOSS_RECOVERY,
> + IEI_WT61P803_PUZZLE_POWER_STATUS,
> +};
> +
> +struct iei_wt61p803_puzzle_device_attribute {
> + struct device_attribute dev_attr;
> + enum iei_wt61p803_puzzle_attribute_type type;
> + u8 index;
> +};
Kernel-doc?
> +/**
> + * struct iei_wt61p803_puzzle_mcu_status - MCU flags state
> + * @ac_recovery_status_flag: AC Recovery Status Flag
> + * @power_loss_recovery: System recovery after power loss
> + * @power_status: System Power-on Method
> + */
> +struct iei_wt61p803_puzzle_mcu_status {
> + u8 ac_recovery_status_flag;
> + u8 power_loss_recovery;
> + u8 power_status;
> +};
> +
> +/**
> + * struct iei_wt61p803_puzzle_reply - MCU reply
> + * @size: Size of the MCU reply
> + * @data: Full MCU reply buffer
> + * @state: Current state of the packet
> + * @received: Was the response fullfilled
> + */
> +struct iei_wt61p803_puzzle_reply {
> + size_t size;
> + unsigned char data[IEI_WT61P803_PUZZLE_RESP_BUF_SIZE];
> + struct completion received;
> +};
> +
> +/**
> + * struct iei_wt61p803_puzzle_mcu_version - MCU version status
> + * @version: Primary firmware version
> + * @build_info: Build date and time
> + * @bootloader_mode: Status of the MCU operation
> + * @protocol_version: MCU communication protocol version
> + * @serial_number: Device factory serial number
> + * @mac_address: Device factory MAC addresses
> + *
> + * Last element of arrays is reserved for '\0'.
> + */
> +struct iei_wt61p803_puzzle_mcu_version {
> + char version[IEI_WT61P803_PUZZLE_VERSION_LENGTH + 1];
> + char build_info[IEI_WT61P803_PUZZLE_BUILD_INFO_LENGTH + 1];
> + bool bootloader_mode;
> + char protocol_version[IEI_WT61P803_PUZZLE_PROTOCOL_VERSION_LENGTH + 1];
> + char serial_number[IEI_WT61P803_PUZZLE_SN_LENGTH + 1];
> + char mac_address[IEI_WT61P803_PUZZLE_NB_MAC][IEI_WT61P803_PUZZLE_MAC_LENGTH + 1];
> +};
> +
> +/**
> + * struct iei_wt61p803_puzzle - IEI WT61P803 PUZZLE MCU Driver
> + * @serdev: Pointer to underlying serdev device
> + * @dev: Pointer to underlying dev device
> + * @reply_lock: Reply mutex lock
> + * @reply: Pointer to the iei_wt61p803_puzzle_reply struct
> + * @version: MCU version related data
> + * @status: MCU status related data
> + * @response_buffer Command response buffer allocation
> + * @lock General member mutex lock
> + */
> +struct iei_wt61p803_puzzle {
> + struct serdev_device *serdev;
> + struct device *dev;
> + struct mutex reply_lock; /* lock to prevent multiple firmware calls */
> + struct iei_wt61p803_puzzle_reply *reply;
> + struct iei_wt61p803_puzzle_mcu_version version;
> + struct iei_wt61p803_puzzle_mcu_status status;
> + unsigned char response_buffer[IEI_WT61P803_PUZZLE_BUF_SIZE];
> + struct mutex lock; /* lock to protect response buffer */
> +};
> +
> +static unsigned char iei_wt61p803_puzzle_checksum(unsigned char *buf, size_t len)
> +{
> + unsigned char checksum = 0;
> + size_t i;
> +
> + for (i = 0; i < len; i++)
> + checksum ^= buf[i];
> + return checksum;
> +}
Are you sure there isn't a generic implementation you can use?
> +static int iei_wt61p803_puzzle_process_resp(struct iei_wt61p803_puzzle *mcu,
> + const unsigned char *raw_resp_data, size_t size)
> +{
> + unsigned char checksum;
> +
> + /* Check the incoming frame header */
> + if (!(raw_resp_data[0] == IEI_WT61P803_PUZZLE_CMD_HEADER_START ||
> + raw_resp_data[0] == IEI_WT61P803_PUZZLE_CMD_HEADER_START_OTHER ||
> + (raw_resp_data[0] == IEI_WT61P803_PUZZLE_CMD_HEADER_EEPROM &&
> + raw_resp_data[1] == IEI_WT61P803_PUZZLE_CMD_EEPROM_READ))) {
> + if (mcu->reply->size + size >= sizeof(mcu->reply->data))
> + return -EIO;
> +
> + /* Append the frame to existing data */
> + memcpy(mcu->reply->data + mcu->reply->size, raw_resp_data, size);
> + mcu->reply->size += size;
> + } else {
> + if (size >= sizeof(mcu->reply->data))
> + return -EIO;
> +
> + /* Start processing a new frame */
> + memcpy(mcu->reply->data, raw_resp_data, size);
> + mcu->reply->size = size;
> + }
> +
> + checksum = iei_wt61p803_puzzle_checksum(mcu->reply->data, mcu->reply->size - 1);
> + if (checksum != mcu->reply->data[mcu->reply->size - 1]) {
> + /* The checksum isn't matched yet, wait for new frames */
> + return size;
> + }
> +
> + /* Received all the data */
> + complete(&mcu->reply->received);
> +
> + return size;
> +}
> +
> +static int iei_wt61p803_puzzle_recv_buf(struct serdev_device *serdev,
> + const unsigned char *data, size_t size)
> +{
> + struct iei_wt61p803_puzzle *mcu = serdev_device_get_drvdata(serdev);
> + int ret;
> +
> + ret = iei_wt61p803_puzzle_process_resp(mcu, data, size);
> + /* Return the number of processed bytes if function returns error,
> + * discard the remaining incoming data, since the frame this data
> + * belongs to is broken anyway
> + */
Place this comment above the function call please.
And fix all of your comments to conform to the kernel Coding Standard.
> + if (ret < 0)
> + return size;
> +
> + return ret;
> +}
> +
> +static const struct serdev_device_ops iei_wt61p803_puzzle_serdev_device_ops = {
> + .receive_buf = iei_wt61p803_puzzle_recv_buf,
> + .write_wakeup = serdev_device_write_wakeup,
> +};
> +
> +/**
> + * iei_wt61p803_puzzle_write_command_watchdog() - Watchdog of the normal cmd
> + * @mcu: Pointer to the iei_wt61p803_puzzle core MFD struct
> + * @cmd: Pointer to the char array to send (size should be content + 1 (xor))
> + * @size: Size of the cmd char array
> + * @reply_data: Pointer to the reply/response data array (should be allocated)
> + * @reply_size: Pointer to size_t (size of reply_data)
> + * @retry_count: Number of times to retry sending the command to the MCU
> + */
> +int iei_wt61p803_puzzle_write_command_watchdog(struct iei_wt61p803_puzzle *mcu,
> + unsigned char *cmd, size_t size,
> + unsigned char *reply_data,
> + size_t *reply_size, int retry_count)
> +{
> + struct device *dev = &mcu->serdev->dev;
> + int ret, i;
> +
> + for (i = 0; i < retry_count; i++) {
> + ret = iei_wt61p803_puzzle_write_command(mcu, cmd, size,
> + reply_data, reply_size);
> + if (ret != -ETIMEDOUT)
> + return ret;
> + }
> +
> + dev_err(dev, "Command response timed out. Retries: %d\n", retry_count);
> +
> + return -ETIMEDOUT;
> +}
> +EXPORT_SYMBOL_GPL(iei_wt61p803_puzzle_write_command_watchdog);
Don't rely on the export/prototype for forward declaration.
Place this function below iei_wt61p803_puzzle_write_command() please.
> +/**
> + * iei_wt61p803_puzzle_write_command() - Send a structured command to the MCU
> + * @mcu: Pointer to the iei_wt61p803_puzzle core MFD struct
> + * @cmd: Pointer to the char array to send (size should be content + 1 (xor))
> + * @size: Size of the cmd char array
> + * @reply_data: Pointer to the reply/response data array (should be allocated)
> + *
> + * Sends a structured command to the MCU.
> + */
> +int iei_wt61p803_puzzle_write_command(struct iei_wt61p803_puzzle *mcu,
> + unsigned char *cmd, size_t size,
> + unsigned char *reply_data,
> + size_t *reply_size)
> +{
> + struct device *dev = &mcu->serdev->dev;
> + int ret;
> +
> + if (size <= 1 || size > IEI_WT61P803_PUZZLE_MAX_COMMAND_LENGTH)
> + return -EINVAL;
> +
> + mutex_lock(&mcu->reply_lock);
> +
> + cmd[size - 1] = iei_wt61p803_puzzle_checksum(cmd, size - 1);
> +
> + /* Initialize reply struct */
> + reinit_completion(&mcu->reply->received);
> + mcu->reply->size = 0;
'\n' here, as the next line is not related to the comment.
> + usleep_range(2000, 10000);
What's the purpose of the sleep here?
Where does this range come from? Is there a datasheet?
'\n' here.
> + serdev_device_write_flush(mcu->serdev);
> + ret = serdev_device_write_buf(mcu->serdev, cmd, size);
> + if (ret < 0)
> + goto exit;
> +
> + serdev_device_wait_until_sent(mcu->serdev, IEI_WT61P803_PUZZLE_GENERAL_TIMEOUT);
> + ret = wait_for_completion_timeout(&mcu->reply->received,
> + IEI_WT61P803_PUZZLE_GENERAL_TIMEOUT);
> + if (ret == 0) {
> + dev_err(dev, "Command reply receive timeout\n");
Can you turn this into a proper English sentence please?
Perhaps "Timeout command received" or "Command timed out"?
> + ret = -ETIMEDOUT;
> + goto exit;
Tell us the goto's intention, so 'unlock' here.
> + }
> +
> + *reply_size = mcu->reply->size;
> + /* Copy the received data, as it will not be available after a new frame is received */
> + memcpy(reply_data, mcu->reply->data, mcu->reply->size);
> + ret = 0;
read/write calls usually return the size of data read/written.
'\n' here. This code is very bunched up/hard to read.
> +exit:
> + mutex_unlock(&mcu->reply_lock);
> + return ret;
> +}
> +EXPORT_SYMBOL_GPL(iei_wt61p803_puzzle_write_command);
> +
> +static int iei_wt61p803_puzzle_buzzer(struct iei_wt61p803_puzzle *mcu, bool long_beep)
> +{
> + unsigned char *resp_buf = mcu->response_buffer;
> + unsigned char buzzer_cmd[4] = {};
> + size_t reply_size;
> + int ret;
> +
> + buzzer_cmd[0] = IEI_WT61P803_PUZZLE_CMD_HEADER_START;
> + buzzer_cmd[1] = IEI_WT61P803_PUZZLE_CMD_FUNCTION_SINGLE;
> + buzzer_cmd[2] = long_beep ? '3' : '2'; /* Buzzer 1.5 / 0.5 second beep */
> +
> + mutex_lock(&mcu->lock);
> + ret = iei_wt61p803_puzzle_write_command(mcu, buzzer_cmd, sizeof(buzzer_cmd),
> + resp_buf, &reply_size);
> + if (ret)
> + goto exit;
> +
> + if (reply_size != 3) {
> + ret = -EIO;
> + goto exit;
> + }
> +
> + if (!(resp_buf[0] == IEI_WT61P803_PUZZLE_CMD_HEADER_START &&
> + resp_buf[1] == IEI_WT61P803_PUZZLE_CMD_RESPONSE_OK &&
> + resp_buf[2] == IEI_WT61P803_PUZZLE_CHECKSUM_RESPONSE_OK)) {
> + ret = -EPROTO;
> + goto exit;
> + }
Why does all this processing have to be conducted under a lock?
'\n'
> +exit:
> + mutex_unlock(&mcu->lock);
> + return ret;
> +}
> +
> +static int iei_wt61p803_puzzle_get_version(struct iei_wt61p803_puzzle *mcu)
> +{
> + unsigned char version_cmd[3] = {
As there are multiple 'version's, please name them all.
Is this the 'hw_version'?
> + IEI_WT61P803_PUZZLE_CMD_HEADER_START_OTHER,
> + IEI_WT61P803_PUZZLE_CMD_OTHER_VERSION,
> + };
> + unsigned char build_info_cmd[3] = {
> + IEI_WT61P803_PUZZLE_CMD_HEADER_START_OTHER,
> + IEI_WT61P803_PUZZLE_CMD_OTHER_BUILD,
> + };
> + unsigned char bootloader_mode_cmd[3] = {
> + IEI_WT61P803_PUZZLE_CMD_HEADER_START_OTHER,
> + IEI_WT61P803_PUZZLE_CMD_OTHER_BOOTLOADER_MODE,
> + };
> + unsigned char protocol_version_cmd[3] = {
> + IEI_WT61P803_PUZZLE_CMD_HEADER_START_OTHER,
> + IEI_WT61P803_PUZZLE_CMD_OTHER_PROTOCOL_VERSION,
> + };
> + unsigned char *rb = mcu->response_buffer;
> + size_t reply_size;
> + int ret;
> +
> + mutex_lock(&mcu->lock);
> +
> + ret = iei_wt61p803_puzzle_write_command(mcu, version_cmd, sizeof(version_cmd),
> + rb, &reply_size);
> + if (ret)
> + goto err;
This is different again. Please use 'unlock' throughout.
'\n' after all of these (ret) checks please.
Sometimes it's there, other times it's not. Please be consistent.
> + if (reply_size < 7) {
> + ret = -EIO;
> + goto err;
> + }
> + sprintf(mcu->version.version, "v%c.%.3s", rb[2], &rb[3]);
> +
> + ret = iei_wt61p803_puzzle_write_command(mcu, build_info_cmd,
> + sizeof(build_info_cmd), rb,
> + &reply_size);
> + if (ret)
> + goto err;
> + if (reply_size < 15) {
> + ret = -EIO;
> + goto err;
> + }
I don't like this setup.
Please change the API so that everything is encoded in ret.
If ret is less than 0 then an error occurred else encode the
reply_size into it.
> + sprintf(mcu->version.build_info, "%c%c/%c%c/%.4s %c%c:%c%c",
> + rb[8], rb[9], rb[6], rb[7], &rb[2], rb[10], rb[11],
> + rb[12], rb[13]);
> +
> + ret = iei_wt61p803_puzzle_write_command(mcu, bootloader_mode_cmd,
> + sizeof(bootloader_mode_cmd), rb,
> + &reply_size);
> + if (ret)
> + goto err;
> + if (reply_size < 4) {
> + ret = -EIO;
> + goto err;
> + }
> + if (rb[2] == IEI_WT61P803_PUZZLE_CMD_OTHER_MODE_APPS)
> + mcu->version.bootloader_mode = false;
> + else if (rb[2] == IEI_WT61P803_PUZZLE_CMD_OTHER_MODE_BOOTLOADER)
> + mcu->version.bootloader_mode = true;
You can drop one of these checks, no?
If bootloader_mode is already initialised you only need the 2nd one.
If it's not, just 'else bootloader_mode = false'.
> + ret = iei_wt61p803_puzzle_write_command(mcu, protocol_version_cmd,
> + sizeof(protocol_version_cmd), rb,
> + &reply_size);
> + if (ret)
> + goto err;
> + if (reply_size < 9) {
> + ret = -EIO;
> + goto err;
> + }
> + sprintf(mcu->version.protocol_version, "v%c.%c%c%c%c%c",
> + rb[7], rb[6], rb[5], rb[4], rb[3], rb[2]);
'\n'
> +err:
'unlock'
> + mutex_unlock(&mcu->lock);
> + return ret;
> +}
> +
> +static int iei_wt61p803_puzzle_get_mcu_status(struct iei_wt61p803_puzzle *mcu)
> +{
> + unsigned char mcu_status_cmd[5] = {
> + IEI_WT61P803_PUZZLE_CMD_HEADER_START,
> + IEI_WT61P803_PUZZLE_CMD_FUNCTION_OTHER,
> + IEI_WT61P803_PUZZLE_CMD_FUNCTION_OTHER_STATUS,
> + IEI_WT61P803_PUZZLE_CMD_FUNCTION_OTHER_STATUS,
> + };
> + unsigned char *resp_buf = mcu->response_buffer;
> + size_t reply_size;
> + int ret;
> +
> + mutex_lock(&mcu->lock);
> + ret = iei_wt61p803_puzzle_write_command(mcu, mcu_status_cmd, sizeof(mcu_status_cmd),
> + resp_buf, &reply_size);
> + if (ret)
> + goto exit;
> + if (reply_size < 20) {
> + ret = -EIO;
> + goto exit;
> + }
> +
> + /* Response format:
> + * (IDX RESPONSE)
> + * 0 @
> + * 1 O
> + * 2 S
> + * 3 S
> + * ...
> + * 5 AC Recovery Status Flag
> + * ...
> + * 10 Power Loss Recovery
> + * ...
> + * 19 Power Status (system power on method)
> + * 20 XOR checksum
> + */
> + if (resp_buf[0] == IEI_WT61P803_PUZZLE_CMD_HEADER_START &&
> + resp_buf[1] == IEI_WT61P803_PUZZLE_CMD_FUNCTION_OTHER &&
> + resp_buf[2] == IEI_WT61P803_PUZZLE_CMD_FUNCTION_OTHER_STATUS &&
> + resp_buf[3] == IEI_WT61P803_PUZZLE_CMD_FUNCTION_OTHER_STATUS) {
> + mcu->status.ac_recovery_status_flag = resp_buf[5];
> + mcu->status.power_loss_recovery = resp_buf[10];
> + mcu->status.power_status = resp_buf[19];
> + }
'\n'
> +exit:
> + mutex_unlock(&mcu->lock);
> + return ret;
> +}
> +
> +static int iei_wt61p803_puzzle_get_serial_number(struct iei_wt61p803_puzzle *mcu)
> +{
> + unsigned char *resp_buf = mcu->response_buffer;
> + unsigned char serial_number_cmd[5] = {
> + IEI_WT61P803_PUZZLE_CMD_HEADER_EEPROM,
> + IEI_WT61P803_PUZZLE_CMD_EEPROM_READ,
> + 0x00, /* EEPROM read address */
> + 0x24, /* Data length */
All of the magic numbers in this driver should be defined ideally.
> + };
> + size_t reply_size;
> + int ret;
> +
> + mutex_lock(&mcu->lock);
> + ret = iei_wt61p803_puzzle_write_command(mcu, serial_number_cmd,
> + sizeof(serial_number_cmd),
> + resp_buf, &reply_size);
> + if (ret)
> + goto err;
> +
> + if (reply_size < IEI_WT61P803_PUZZLE_SN_LENGTH + 4) {
Why 4? Probably better to define it.
> + ret = -EIO;
> + goto err;
> + }
> +
> + sprintf(mcu->version.serial_number, "%.*s",
> + IEI_WT61P803_PUZZLE_SN_LENGTH, resp_buf + 4);
'\n'
> +err:
> + mutex_unlock(&mcu->lock);
> + return ret;
> +}
> +
> +static int iei_wt61p803_puzzle_write_serial_number(struct iei_wt61p803_puzzle *mcu,
> + unsigned char serial_number[36])
> +{
> + unsigned char *resp_buf = mcu->response_buffer;
> + unsigned char serial_number_header[4] = {
> + IEI_WT61P803_PUZZLE_CMD_HEADER_EEPROM,
> + IEI_WT61P803_PUZZLE_CMD_EEPROM_WRITE,
> + 0x00, /* EEPROM write address */
> + 0xC, /* Data length */
> + };
> + unsigned char serial_number_cmd[4 + 12 + 1]; /* header, serial number, XOR checksum */
> + int ret, sn_counter;
> + size_t reply_size;
> +
> + /* The MCU can only handle 22 byte messages, send the S/N in 12 byte chunks */
Byte
> + mutex_lock(&mcu->lock);
> + for (sn_counter = 0; sn_counter < 3; sn_counter++) {
Why 3? Please define it.
> + serial_number_header[2] = 0x0 + 0xC * sn_counter;
Define all magic numbers please.
I won't mention this again from here.
> + memcpy(serial_number_cmd, serial_number_header, sizeof(serial_number_header));
> + memcpy(serial_number_cmd + sizeof(serial_number_header),
> + serial_number + 0xC * sn_counter, 0xC);
> +
> + ret = iei_wt61p803_puzzle_write_command(mcu, serial_number_cmd,
> + sizeof(serial_number_cmd),
> + resp_buf, &reply_size);
> + if (ret)
> + goto err;
> + if (reply_size != 3) {
> + ret = -EIO;
> + goto err;
> + }
> + if (!(resp_buf[0] == IEI_WT61P803_PUZZLE_CMD_HEADER_START &&
> + resp_buf[1] == IEI_WT61P803_PUZZLE_CMD_RESPONSE_OK &&
> + resp_buf[2] == IEI_WT61P803_PUZZLE_CHECKSUM_RESPONSE_OK)) {
> + ret = -EPROTO;
> + goto err;
> + }
> + }
> +
> + sprintf(mcu->version.serial_number, "%.*s",
> + IEI_WT61P803_PUZZLE_SN_LENGTH, serial_number);
> +err:
> + mutex_unlock(&mcu->lock);
> + return ret;
> +}
> +
> +static int iei_wt61p803_puzzle_get_mac_address(struct iei_wt61p803_puzzle *mcu, int index)
> +{
> + unsigned char *resp_buf = mcu->response_buffer;
> + unsigned char mac_address_cmd[5] = {
> + IEI_WT61P803_PUZZLE_CMD_HEADER_EEPROM,
> + IEI_WT61P803_PUZZLE_CMD_EEPROM_READ,
> + 0x00, /* EEPROM read address */
> + 0x11, /* Data length */
> + };
> + size_t reply_size;
> + int ret;
> +
> + mutex_lock(&mcu->lock);
> + mac_address_cmd[2] = 0x24 + 0x11 * index;
> +
> + ret = iei_wt61p803_puzzle_write_command(mcu, mac_address_cmd,
> + sizeof(mac_address_cmd),
> + resp_buf, &reply_size);
> + if (ret)
> + goto err;
> +
> + if (reply_size < 22) {
> + ret = -EIO;
> + goto err;
> + }
> +
> + sprintf(mcu->version.mac_address[index], "%.*s",
> + IEI_WT61P803_PUZZLE_MAC_LENGTH, resp_buf + 4);
> +err:
> + mutex_unlock(&mcu->lock);
> + return ret;
> +}
> +
> +static int
> +iei_wt61p803_puzzle_write_mac_address(struct iei_wt61p803_puzzle *mcu,
> + unsigned char mac_address[IEI_WT61P803_PUZZLE_MAC_LENGTH],
> + int mac_address_idx)
> +{
> + unsigned char mac_address_cmd[4 + IEI_WT61P803_PUZZLE_MAC_LENGTH + 1];
> + unsigned char *resp_buf = mcu->response_buffer;
> + unsigned char mac_address_header[4] = {
> + IEI_WT61P803_PUZZLE_CMD_HEADER_EEPROM,
> + IEI_WT61P803_PUZZLE_CMD_EEPROM_WRITE,
> + 0x00, /* EEPROM write address */
> + 0x11, /* Data length */
> + };
> + size_t reply_size;
> + int ret;
> +
> + if (mac_address_idx < 0 || mac_address_idx >= IEI_WT61P803_PUZZLE_NB_MAC)
> + return -EINVAL;
> +
> + mac_address_header[2] = 0x24 + 0x11 * mac_address_idx;
> +
> + /* Concat mac_address_header, mac_address to mac_address_cmd */
> + memcpy(mac_address_cmd, mac_address_header, sizeof(mac_address_header));
> + memcpy(mac_address_cmd + sizeof(mac_address_header), mac_address,
> + IEI_WT61P803_PUZZLE_MAC_LENGTH);
> +
> + mutex_lock(&mcu->lock);
> + ret = iei_wt61p803_puzzle_write_command(mcu, mac_address_cmd,
> + sizeof(mac_address_cmd),
> + resp_buf, &reply_size);
> + if (ret)
> + goto err;
> + if (reply_size != 3) {
> + ret = -EIO;
> + goto err;
> + }
> + if (!(resp_buf[0] == IEI_WT61P803_PUZZLE_CMD_HEADER_START &&
> + resp_buf[1] == IEI_WT61P803_PUZZLE_CMD_RESPONSE_OK &&
> + resp_buf[2] == IEI_WT61P803_PUZZLE_CHECKSUM_RESPONSE_OK)) {
> + ret = -EPROTO;
> + goto err;
> + }
> +
> + sprintf(mcu->version.mac_address[mac_address_idx], "%.*s",
> + IEI_WT61P803_PUZZLE_MAC_LENGTH, mac_address);
> +err:
> + mutex_unlock(&mcu->lock);
> + return ret;
> +}
> +
> +static int iei_wt61p803_puzzle_write_power_loss_recovery(struct iei_wt61p803_puzzle *mcu,
> + int power_loss_recovery_action)
> +{
> + unsigned char *resp_buf = mcu->response_buffer;
> + unsigned char power_loss_recovery_cmd[5] = {};
> + size_t reply_size;
> + int ret;
> +
> + if (power_loss_recovery_action < 0 || power_loss_recovery_action > 4)
What are the 5 actions? Are they mentioned/defined/enumed anywhere?
> + return -EINVAL;
> +
> + power_loss_recovery_cmd[0] = IEI_WT61P803_PUZZLE_CMD_HEADER_START;
> + power_loss_recovery_cmd[1] = IEI_WT61P803_PUZZLE_CMD_FUNCTION_OTHER;
> + power_loss_recovery_cmd[2] = IEI_WT61P803_PUZZLE_CMD_FUNCTION_OTHER_POWER_LOSS;
> + power_loss_recovery_cmd[3] = hex_asc[power_loss_recovery_action];
> +
> + mutex_lock(&mcu->lock);
> + ret = iei_wt61p803_puzzle_write_command(mcu, power_loss_recovery_cmd,
> + sizeof(power_loss_recovery_cmd),
> + resp_buf, &reply_size);
> + if (ret)
> + goto exit;
> + mcu->status.power_loss_recovery = power_loss_recovery_action;
> +exit:
> + mutex_unlock(&mcu->lock);
> + return ret;
> +}
###########################################
###########################################
> +#define to_puzzle_dev_attr(_attr) \
> + container_of(_attr, struct iei_wt61p803_puzzle_device_attribute, dev_attr)
Place this at the top of the file please.
> +static ssize_t show_output(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + struct iei_wt61p803_puzzle *mcu = dev_get_drvdata(dev);
> + struct iei_wt61p803_puzzle_device_attribute *pattr = to_puzzle_dev_attr(attr);
> + int ret;
> +
> + switch (pattr->type) {
> + case IEI_WT61P803_PUZZLE_VERSION:
> + return scnprintf(buf, PAGE_SIZE, "%s\n", mcu->version.version);
> + case IEI_WT61P803_PUZZLE_BUILD_INFO:
> + return scnprintf(buf, PAGE_SIZE, "%s\n", mcu->version.build_info);
> + case IEI_WT61P803_PUZZLE_BOOTLOADER_MODE:
> + return scnprintf(buf, PAGE_SIZE, "%d\n", mcu->version.bootloader_mode);
> + case IEI_WT61P803_PUZZLE_PROTOCOL_VERSION:
> + return scnprintf(buf, PAGE_SIZE, "%s\n", mcu->version.protocol_version);
> + case IEI_WT61P803_PUZZLE_SERIAL_NUMBER:
> + ret = iei_wt61p803_puzzle_get_serial_number(mcu);
> + if (!ret)
> + ret = scnprintf(buf, PAGE_SIZE, "%s\n", mcu->version.serial_number);
> + else
> + ret = 0;
> + return ret;
> + case IEI_WT61P803_PUZZLE_MAC_ADDRESS:
> + ret = iei_wt61p803_puzzle_get_mac_address(mcu, pattr->index);
> + if (!ret)
> + ret = scnprintf(buf, PAGE_SIZE, "%s\n",
> + mcu->version.mac_address[pattr->index]);
> + else
> + ret = 0;
> + return ret;
> + case IEI_WT61P803_PUZZLE_AC_RECOVERY_STATUS:
> + case IEI_WT61P803_PUZZLE_POWER_LOSS_RECOVERY:
> + case IEI_WT61P803_PUZZLE_POWER_STATUS:
> + ret = iei_wt61p803_puzzle_get_mcu_status(mcu);
> + if (ret)
> + return ret;
> +
> + mutex_lock(&mcu->lock);
> + switch (pattr->type) {
> + case IEI_WT61P803_PUZZLE_AC_RECOVERY_STATUS:
> + ret = scnprintf(buf, PAGE_SIZE, "%x\n",
> + mcu->status.ac_recovery_status_flag);
> + break;
> + case IEI_WT61P803_PUZZLE_POWER_LOSS_RECOVERY:
> + ret = scnprintf(buf, PAGE_SIZE, "%x\n", mcu->status.power_loss_recovery);
> + break;
> + case IEI_WT61P803_PUZZLE_POWER_STATUS:
> + ret = scnprintf(buf, PAGE_SIZE, "%x\n", mcu->status.power_status);
> + break;
> + default:
> + ret = 0;
> + break;
> + }
> + mutex_unlock(&mcu->lock);
> + return ret;
> + default:
> + return 0;
> + }
> +
> + return 0;
> +}
> +
> +static ssize_t store_output(struct device *dev,
> + struct device_attribute *attr,
> + const char *buf, size_t len)
> +{
> + unsigned char serial_number[IEI_WT61P803_PUZZLE_SN_LENGTH];
> + unsigned char mac_address[IEI_WT61P803_PUZZLE_MAC_LENGTH];
> + struct iei_wt61p803_puzzle *mcu = dev_get_drvdata(dev);
> + struct iei_wt61p803_puzzle_device_attribute *pattr = to_puzzle_dev_attr(attr);
> + int power_loss_recovery_action = 0;
> + int ret;
> +
> + switch (pattr->type) {
> + case IEI_WT61P803_PUZZLE_SERIAL_NUMBER:
> + if (len != (size_t)(IEI_WT61P803_PUZZLE_SN_LENGTH + 1))
> + return -EINVAL;
> + memcpy(serial_number, buf, sizeof(serial_number));
> + ret = iei_wt61p803_puzzle_write_serial_number(mcu, serial_number);
> + if (ret)
> + return ret;
> + return len;
> + case IEI_WT61P803_PUZZLE_MAC_ADDRESS:
> + if (len != (size_t)(IEI_WT61P803_PUZZLE_MAC_LENGTH + 1))
> + return -EINVAL;
> +
> + memcpy(mac_address, buf, sizeof(mac_address));
> +
> + if (strlen(attr->attr.name) != 13)
> + return -EIO;
> +
> + ret = iei_wt61p803_puzzle_write_mac_address(mcu, mac_address, pattr->index);
> + if (ret)
> + return ret;
> + return len;
> + case IEI_WT61P803_PUZZLE_POWER_LOSS_RECOVERY:
> + ret = kstrtoint(buf, 10, &power_loss_recovery_action);
> + if (ret)
> + return ret;
> + ret = iei_wt61p803_puzzle_write_power_loss_recovery(mcu,
> + power_loss_recovery_action);
> + if (ret)
> + return ret;
> + return len;
> + default:
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +#define IEI_WT61P803_PUZZLE_ATTR(_name, _mode, _show, _store, _type, _index) \
> + struct iei_wt61p803_puzzle_device_attribute dev_attr_##_name = \
> + { .dev_attr = __ATTR(_name, _mode, _show, _store), \
> + .type = _type, \
> + .index = _index }
> +
> +#define IEI_WT61P803_PUZZLE_ATTR_RO(_name, _type, _id) \
> + IEI_WT61P803_PUZZLE_ATTR(_name, 0444, show_output, NULL, _type, _id)
> +
> +#define IEI_WT61P803_PUZZLE_ATTR_RW(_name, _type, _id) \
> + IEI_WT61P803_PUZZLE_ATTR(_name, 0644, show_output, store_output, _type, _id)
> +
> +static IEI_WT61P803_PUZZLE_ATTR_RO(version, IEI_WT61P803_PUZZLE_VERSION, 0);
> +static IEI_WT61P803_PUZZLE_ATTR_RO(build_info, IEI_WT61P803_PUZZLE_BUILD_INFO, 0);
> +static IEI_WT61P803_PUZZLE_ATTR_RO(bootloader_mode, IEI_WT61P803_PUZZLE_BOOTLOADER_MODE, 0);
> +static IEI_WT61P803_PUZZLE_ATTR_RO(protocol_version, IEI_WT61P803_PUZZLE_PROTOCOL_VERSION, 0);
> +static IEI_WT61P803_PUZZLE_ATTR_RW(serial_number, IEI_WT61P803_PUZZLE_SERIAL_NUMBER, 0);
> +static IEI_WT61P803_PUZZLE_ATTR_RW(mac_address_0, IEI_WT61P803_PUZZLE_MAC_ADDRESS, 0);
> +static IEI_WT61P803_PUZZLE_ATTR_RW(mac_address_1, IEI_WT61P803_PUZZLE_MAC_ADDRESS, 1);
> +static IEI_WT61P803_PUZZLE_ATTR_RW(mac_address_2, IEI_WT61P803_PUZZLE_MAC_ADDRESS, 2);
> +static IEI_WT61P803_PUZZLE_ATTR_RW(mac_address_3, IEI_WT61P803_PUZZLE_MAC_ADDRESS, 3);
> +static IEI_WT61P803_PUZZLE_ATTR_RW(mac_address_4, IEI_WT61P803_PUZZLE_MAC_ADDRESS, 4);
> +static IEI_WT61P803_PUZZLE_ATTR_RW(mac_address_5, IEI_WT61P803_PUZZLE_MAC_ADDRESS, 5);
> +static IEI_WT61P803_PUZZLE_ATTR_RW(mac_address_6, IEI_WT61P803_PUZZLE_MAC_ADDRESS, 6);
> +static IEI_WT61P803_PUZZLE_ATTR_RW(mac_address_7, IEI_WT61P803_PUZZLE_MAC_ADDRESS, 7);
> +static IEI_WT61P803_PUZZLE_ATTR_RO(ac_recovery_status, IEI_WT61P803_PUZZLE_AC_RECOVERY_STATUS, 0);
> +static IEI_WT61P803_PUZZLE_ATTR_RW(power_loss_recovery, IEI_WT61P803_PUZZLE_POWER_LOSS_RECOVERY, 0);
> +static IEI_WT61P803_PUZZLE_ATTR_RO(power_status, IEI_WT61P803_PUZZLE_POWER_STATUS, 0);
> +
> +static struct attribute *iei_wt61p803_puzzle_attrs[] = {
> + &dev_attr_version.dev_attr.attr,
> + &dev_attr_build_info.dev_attr.attr,
> + &dev_attr_bootloader_mode.dev_attr.attr,
> + &dev_attr_protocol_version.dev_attr.attr,
> + &dev_attr_serial_number.dev_attr.attr,
> + &dev_attr_mac_address_0.dev_attr.attr,
> + &dev_attr_mac_address_1.dev_attr.attr,
> + &dev_attr_mac_address_2.dev_attr.attr,
> + &dev_attr_mac_address_3.dev_attr.attr,
> + &dev_attr_mac_address_4.dev_attr.attr,
> + &dev_attr_mac_address_5.dev_attr.attr,
> + &dev_attr_mac_address_6.dev_attr.attr,
> + &dev_attr_mac_address_7.dev_attr.attr,
> + &dev_attr_ac_recovery_status.dev_attr.attr,
> + &dev_attr_power_loss_recovery.dev_attr.attr,
> + &dev_attr_power_status.dev_attr.attr,
> + NULL
> +};
> +ATTRIBUTE_GROUPS(iei_wt61p803_puzzle);
> +
> +static int iei_wt61p803_puzzle_sysfs_create(struct device *dev,
> + struct iei_wt61p803_puzzle *mcu)
Why do you need 'mcu' here?
> +{
> + int ret;
> +
> + ret = sysfs_create_groups(&mcu->dev->kobj, iei_wt61p803_puzzle_groups);
> + if (ret)
> + mfd_remove_devices(mcu->dev);
You can't remove devices you haven't added!
> + return ret;
> +}
> +
> +static int iei_wt61p803_puzzle_sysfs_remove(struct device *dev,
> + struct iei_wt61p803_puzzle *mcu)
> +{
> + /* Remove sysfs groups */
> + sysfs_remove_groups(&mcu->dev->kobj, iei_wt61p803_puzzle_groups);
> + mfd_remove_devices(mcu->dev);
> +
> + return 0;
> +}
###########################################
###########################################
> +static int iei_wt61p803_puzzle_probe(struct serdev_device *serdev)
> +{
> + struct device *dev = &serdev->dev;
> + struct iei_wt61p803_puzzle *mcu;
> + u32 baud;
> + int ret;
> +
> + /* Read the baud rate from 'current-speed', because the MCU supports different rates */
> + if (device_property_read_u32(dev, "current-speed", &baud)) {
> + dev_err(dev,
> + "'current-speed' is not specified in device node\n");
Same line please.
"'current-speed' device tree property not found"
> + return -EINVAL;
> + }
> + dev_dbg(dev, "Driver baud rate: %d\n", baud);
> +
> + /* Allocate the memory */
Drop this comment.
> + mcu = devm_kzalloc(dev, sizeof(*mcu), GFP_KERNEL);
> + if (!mcu)
> + return -ENOMEM;
> +
> + mcu->reply = devm_kzalloc(dev, sizeof(*mcu->reply), GFP_KERNEL);
> + if (!mcu->reply)
> + return -ENOMEM;
> +
> + /* Initialize device struct data */
And this please.
> + mcu->serdev = serdev;
> + mcu->dev = dev;
Doesn't serdev already have dev?
If so, you don't need to store both.
> + init_completion(&mcu->reply->received);
> + mutex_init(&mcu->reply_lock);
Why can't you use 'lock' in all cases?
> + mutex_init(&mcu->lock);
> +
> + /* Setup UART interface */
Drop the comment please. It's superfluous.
> + serdev_device_set_drvdata(serdev, mcu);
> + serdev_device_set_client_ops(serdev, &iei_wt61p803_puzzle_serdev_device_ops);
> + ret = devm_serdev_device_open(dev, serdev);
> + if (ret)
> + return ret;
'\n'
> + serdev_device_set_baudrate(serdev, baud);
> + serdev_device_set_flow_control(serdev, false);
> + ret = serdev_device_set_parity(serdev, SERDEV_PARITY_NONE);
> + if (ret) {
> + dev_err(dev, "Failed to set parity\n");
> + return ret;
> + }
> +
> + ret = iei_wt61p803_puzzle_get_version(mcu);
> + if (ret)
> + return ret;
> +
> + dev_dbg(dev, "MCU version: %s\n", mcu->version.version);
> + dev_dbg(dev, "MCU firmware build info: %s\n", mcu->version.build_info);
> + dev_dbg(dev, "MCU in bootloader mode: %s\n",
> + mcu->version.bootloader_mode ? "true" : "false");
> + dev_dbg(dev, "MCU protocol version: %s\n", mcu->version.protocol_version);
> +
> + if (device_property_read_bool(dev, "enable-beep")) {
> + ret = iei_wt61p803_puzzle_buzzer(mcu, false);
You're beeping just because it's enabled?
> + if (ret)
> + return ret;
> + }
> +
> + ret = iei_wt61p803_puzzle_sysfs_create(dev, mcu);
> + if (ret)
> + return ret;
> +
> + return devm_of_platform_populate(dev);
> +}
> +
> +static void iei_wt61p803_puzzle_remove(struct serdev_device *serdev)
> +{
> + struct device *dev = &serdev->dev;
> + struct iei_wt61p803_puzzle *mcu = dev_get_drvdata(dev);
> +
> + iei_wt61p803_puzzle_sysfs_remove(dev, mcu);
> +}
> +
> +static const struct of_device_id iei_wt61p803_puzzle_dt_ids[] = {
> + { .compatible = "iei,wt61p803-puzzle" },
> + { }
> +};
> +
Remove this line.
> +MODULE_DEVICE_TABLE(of, iei_wt61p803_puzzle_dt_ids);
> +
> +static struct serdev_device_driver iei_wt61p803_puzzle_drv = {
> + .probe = iei_wt61p803_puzzle_probe,
> + .remove = iei_wt61p803_puzzle_remove,
No need to tab these out to match the subordinate structure.
> + .driver = {
> + .name = "iei-wt61p803-puzzle",
> + .of_match_table = iei_wt61p803_puzzle_dt_ids,
> + },
> +};
> +
Remove this line.
> +module_serdev_device_driver(iei_wt61p803_puzzle_drv);
> +
> +MODULE_LICENSE("GPL v2");
> +MODULE_AUTHOR("Luka Kovacic <luka.kovacic@...tura.hr>");
> +MODULE_DESCRIPTION("IEI WT61P803 PUZZLE MCU Driver");
> diff --git a/include/linux/mfd/iei-wt61p803-puzzle.h b/include/linux/mfd/iei-wt61p803-puzzle.h
> new file mode 100644
> index 000000000000..7f2da5887dae
> --- /dev/null
> +++ b/include/linux/mfd/iei-wt61p803-puzzle.h
> @@ -0,0 +1,66 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/* IEI WT61P803 PUZZLE MCU Driver
Non-conformant multi-line comment
> + * System management microcontroller for fan control, temperature sensor reading,
> + * LED control and system identification on IEI Puzzle series ARM-based appliances.
> + *
> + * Copyright (C) 2020 Sartura Ltd.
> + * Author: Luka Kovacic <luka.kovacic@...tura.hr>
> + */
> +
> +#ifndef _MFD_IEI_WT61P803_PUZZLE_H_
> +#define _MFD_IEI_WT61P803_PUZZLE_H_
> +
> +#define IEI_WT61P803_PUZZLE_BUF_SIZE 512
> +
> +/* Command magic numbers */
> +#define IEI_WT61P803_PUZZLE_CMD_HEADER_START 0x40 /* @ */
> +#define IEI_WT61P803_PUZZLE_CMD_HEADER_START_OTHER 0x25 /* % */
> +#define IEI_WT61P803_PUZZLE_CMD_HEADER_EEPROM 0xF7
> +
> +#define IEI_WT61P803_PUZZLE_CMD_RESPONSE_OK 0x30 /* 0 */
> +#define IEI_WT61P803_PUZZLE_CHECKSUM_RESPONSE_OK 0x70
> +
> +#define IEI_WT61P803_PUZZLE_CMD_EEPROM_READ 0xA1
> +#define IEI_WT61P803_PUZZLE_CMD_EEPROM_WRITE 0xA0
> +
> +#define IEI_WT61P803_PUZZLE_CMD_OTHER_VERSION 0x56 /* V */
> +#define IEI_WT61P803_PUZZLE_CMD_OTHER_BUILD 0x42 /* B */
> +#define IEI_WT61P803_PUZZLE_CMD_OTHER_BOOTLOADER_MODE 0x4D /* M */
> +#define IEI_WT61P803_PUZZLE_CMD_OTHER_MODE_BOOTLOADER 0x30
> +#define IEI_WT61P803_PUZZLE_CMD_OTHER_MODE_APPS 0x31
> +#define IEI_WT61P803_PUZZLE_CMD_OTHER_PROTOCOL_VERSION 0x50 /* P */
> +
> +#define IEI_WT61P803_PUZZLE_CMD_FUNCTION_SINGLE 0x43 /* C */
> +#define IEI_WT61P803_PUZZLE_CMD_FUNCTION_OTHER 0x4F /* O */
> +#define IEI_WT61P803_PUZZLE_CMD_FUNCTION_OTHER_STATUS 0x53 /* S */
> +#define IEI_WT61P803_PUZZLE_CMD_FUNCTION_OTHER_POWER_LOSS 0x41 /* A */
> +
> +#define IEI_WT61P803_PUZZLE_CMD_LED 0x52 /* R */
> +#define IEI_WT61P803_PUZZLE_CMD_LED_POWER 0x31 /* 1 */
> +
> +#define IEI_WT61P803_PUZZLE_CMD_TEMP 0x54 /* T */
> +#define IEI_WT61P803_PUZZLE_CMD_TEMP_ALL 0x41 /* A */
> +
> +#define IEI_WT61P803_PUZZLE_CMD_FAN 0x46 /* F */
> +#define IEI_WT61P803_PUZZLE_CMD_FAN_PWM_READ 0x5A /* Z */
> +#define IEI_WT61P803_PUZZLE_CMD_FAN_PWM_WRITE 0x57 /* W */
> +#define IEI_WT61P803_PUZZLE_CMD_FAN_PWM_BASE 0x30
> +#define IEI_WT61P803_PUZZLE_CMD_FAN_RPM_BASE 0x41 /* A */
> +
> +#define IEI_WT61P803_PUZZLE_CMD_FAN_PWM(x) (IEI_WT61P803_PUZZLE_CMD_FAN_PWM_BASE + (x)) /* 0 - 1 */
> +#define IEI_WT61P803_PUZZLE_CMD_FAN_RPM(x) (IEI_WT61P803_PUZZLE_CMD_FAN_RPM_BASE + (x)) /* 0 - 5 */
> +
> +struct iei_wt61p803_puzzle_mcu_version;
> +struct iei_wt61p803_puzzle_reply;
> +struct iei_wt61p803_puzzle;
> +
> +int iei_wt61p803_puzzle_write_command_watchdog(struct iei_wt61p803_puzzle *mcu,
> + unsigned char *cmd, size_t size,
> + unsigned char *reply_data, size_t *reply_size,
> + int retry_count);
> +
> +int iei_wt61p803_puzzle_write_command(struct iei_wt61p803_puzzle *mcu,
> + unsigned char *cmd, size_t size,
> + unsigned char *reply_data, size_t *reply_size);
> +
> +#endif /* _MFD_IEI_WT61P803_PUZZLE_H_ */
--
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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