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mfd: cros_ec: Fix and improve kerneldoc comments.

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cros-ec includes inside the MFD subsystem, specially the file
cros_ec_commands.h, has been modified several times and it has grown a
lot, unfortunately, we didn't have care too much about the documentation.
This patch tries to improve the documentation and also fixes all the
issues reported by kerneldoc script.

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Signed-off-by: Benson Leung <bleung@chromium.org>
This commit is contained in:
Enric Balletbo i Serra
2018-07-18 18:09:56 +02:00
committed by Benson Leung
parent cc8a4ea182
commit e2bbf91cad
3 changed files with 310 additions and 212 deletions
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295
include/linux/mfd/cros_ec_commands.h
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@@ -306,15 +306,18 @@ enum host_event_code {
/* Host event mask */
#define EC_HOST_EVENT_MASK(event_code) (1UL << ((event_code) - 1))
/* Arguments at EC_LPC_ADDR_HOST_ARGS */
/**
* struct ec_lpc_host_args - Arguments at EC_LPC_ADDR_HOST_ARGS
* @flags: The host argument flags.
* @command_version: Command version.
* @data_size: The length of data.
* @checksum: Checksum; sum of command + flags + command_version + data_size +
* all params/response data bytes.
*/
struct ec_lpc_host_args {
uint8_t flags;
uint8_t command_version;
uint8_t data_size;
/*
* Checksum; sum of command + flags + command_version + data_size +
* all params/response data bytes.
*/
uint8_t checksum;
} __packed;
@@ -468,54 +471,43 @@ struct ec_lpc_host_args {
#define EC_HOST_REQUEST_VERSION 3
/* Version 3 request from host */
/**
* struct ec_host_request - Version 3 request from host.
* @struct_version: Should be 3. The EC will return EC_RES_INVALID_HEADER if it
* receives a header with a version it doesn't know how to
* parse.
* @checksum: Checksum of request and data; sum of all bytes including checksum
* should total to 0.
* @command: Command to send (EC_CMD_...)
* @command_version: Command version.
* @reserved: Unused byte in current protocol version; set to 0.
* @data_len: Length of data which follows this header.
*/
struct ec_host_request {
/* Struct version (=3)
*
* EC will return EC_RES_INVALID_HEADER if it receives a header with a
* version it doesn't know how to parse.
*/
uint8_t struct_version;
/*
* Checksum of request and data; sum of all bytes including checksum
* should total to 0.
*/
uint8_t checksum;
/* Command code */
uint16_t command;
/* Command version */
uint8_t command_version;
/* Unused byte in current protocol version; set to 0 */
uint8_t reserved;
/* Length of data which follows this header */
uint16_t data_len;
} __packed;
#define EC_HOST_RESPONSE_VERSION 3
/* Version 3 response from EC */
/**
* struct ec_host_response - Version 3 response from EC.
* @struct_version: Struct version (=3).
* @checksum: Checksum of response and data; sum of all bytes including
* checksum should total to 0.
* @result: EC's response to the command (separate from communication failure)
* @data_len: Length of data which follows this header.
* @reserved: Unused bytes in current protocol version; set to 0.
*/
struct ec_host_response {
/* Struct version (=3) */
uint8_t struct_version;
/*
* Checksum of response and data; sum of all bytes including checksum
* should total to 0.
*/
uint8_t checksum;
/* Result code (EC_RES_*) */
uint16_t result;
/* Length of data which follows this header */
uint16_t data_len;
/* Unused bytes in current protocol version; set to 0 */
uint16_t reserved;
} __packed;
@@ -540,6 +532,10 @@ struct ec_host_response {
*/
#define EC_CMD_PROTO_VERSION 0x00
/**
* struct ec_response_proto_version - Response to the proto version command.
* @version: The protocol version.
*/
struct ec_response_proto_version {
uint32_t version;
} __packed;
@@ -550,12 +546,20 @@ struct ec_response_proto_version {
*/
#define EC_CMD_HELLO 0x01
/**
* struct ec_params_hello - Parameters to the hello command.
* @in_data: Pass anything here.
*/
struct ec_params_hello {
uint32_t in_data; /* Pass anything here */
uint32_t in_data;
} __packed;
/**
* struct ec_response_hello - Response to the hello command.
* @out_data: Output will be in_data + 0x01020304.
*/
struct ec_response_hello {
uint32_t out_data; /* Output will be in_data + 0x01020304 */
uint32_t out_data;
} __packed;
/* Get version number */
@@ -567,22 +571,37 @@ enum ec_current_image {
EC_IMAGE_RW
};
/**
* struct ec_response_get_version - Response to the get version command.
* @version_string_ro: Null-terminated RO firmware version string.
* @version_string_rw: Null-terminated RW firmware version string.
* @reserved: Unused bytes; was previously RW-B firmware version string.
* @current_image: One of ec_current_image.
*/
struct ec_response_get_version {
/* Null-terminated version strings for RO, RW */
char version_string_ro[32];
char version_string_rw[32];
char reserved[32]; /* Was previously RW-B string */
uint32_t current_image; /* One of ec_current_image */
char reserved[32];
uint32_t current_image;
} __packed;
/* Read test */
#define EC_CMD_READ_TEST 0x03
/**
* struct ec_params_read_test - Parameters for the read test command.
* @offset: Starting value for read buffer.
* @size: Size to read in bytes.
*/
struct ec_params_read_test {
uint32_t offset; /* Starting value for read buffer */
uint32_t size; /* Size to read in bytes */
uint32_t offset;
uint32_t size;
} __packed;
/**
* struct ec_response_read_test - Response to the read test command.
* @data: Data returned by the read test command.
*/
struct ec_response_read_test {
uint32_t data[32];
} __packed;
@@ -597,18 +616,27 @@ struct ec_response_read_test {
/* Get chip info */
#define EC_CMD_GET_CHIP_INFO 0x05
/**
* struct ec_response_get_chip_info - Response to the get chip info command.
* @vendor: Null-terminated string for chip vendor.
* @name: Null-terminated string for chip name.
* @revision: Null-terminated string for chip mask version.
*/
struct ec_response_get_chip_info {
/* Null-terminated strings */
char vendor[32];
char name[32];
char revision[32]; /* Mask version */
char revision[32];
} __packed;
/* Get board HW version */
#define EC_CMD_GET_BOARD_VERSION 0x06
/**
* struct ec_response_board_version - Response to the board version command.
* @board_version: A monotonously incrementing number.
*/
struct ec_response_board_version {
uint16_t board_version; /* A monotonously incrementing number. */
uint16_t board_version;
} __packed;
/*
@@ -621,27 +649,42 @@ struct ec_response_board_version {
*/
#define EC_CMD_READ_MEMMAP 0x07
/**
* struct ec_params_read_memmap - Parameters for the read memory map command.
* @offset: Offset in memmap (EC_MEMMAP_*).
* @size: Size to read in bytes.
*/
struct ec_params_read_memmap {
uint8_t offset; /* Offset in memmap (EC_MEMMAP_*) */
uint8_t size; /* Size to read in bytes */
uint8_t offset;
uint8_t size;
} __packed;
/* Read versions supported for a command */
#define EC_CMD_GET_CMD_VERSIONS 0x08
/**
* struct ec_params_get_cmd_versions - Parameters for the get command versions.
* @cmd: Command to check.
*/
struct ec_params_get_cmd_versions {
uint8_t cmd; /* Command to check */
uint8_t cmd;
} __packed;
/**
* struct ec_params_get_cmd_versions_v1 - Parameters for the get command
* versions (v1)
* @cmd: Command to check.
*/
struct ec_params_get_cmd_versions_v1 {
uint16_t cmd; /* Command to check */
uint16_t cmd;
} __packed;
/**
* struct ec_response_get_cmd_version - Response to the get command versions.
* @version_mask: Mask of supported versions; use EC_VER_MASK() to compare with
* a desired version.
*/
struct ec_response_get_cmd_versions {
/*
* Mask of supported versions; use EC_VER_MASK() to compare with a
* desired version.
*/
uint32_t version_mask;
} __packed;
@@ -659,6 +702,11 @@ enum ec_comms_status {
EC_COMMS_STATUS_PROCESSING = 1 << 0, /* Processing cmd */
};
/**
* struct ec_response_get_comms_status - Response to the get comms status
* command.
* @flags: Mask of enum ec_comms_status.
*/
struct ec_response_get_comms_status {
uint32_t flags; /* Mask of enum ec_comms_status */
} __packed;
@@ -685,19 +733,19 @@ struct ec_response_test_protocol {
/* EC_RES_IN_PROGRESS may be returned if a command is slow */
#define EC_PROTOCOL_INFO_IN_PROGRESS_SUPPORTED (1 << 0)
/**
* struct ec_response_get_protocol_info - Response to the get protocol info.
* @protocol_versions: Bitmask of protocol versions supported (1 << n means
* version n).
* @max_request_packet_size: Maximum request packet size in bytes.
* @max_response_packet_size: Maximum response packet size in bytes.
* @flags: see EC_PROTOCOL_INFO_*
*/
struct ec_response_get_protocol_info {
/* Fields which exist if at least protocol version 3 supported */
/* Bitmask of protocol versions supported (1 << n means version n)*/
uint32_t protocol_versions;
/* Maximum request packet size, in bytes */
uint16_t max_request_packet_size;
/* Maximum response packet size, in bytes */
uint16_t max_response_packet_size;
/* Flags; see EC_PROTOCOL_INFO_* */
uint32_t flags;
} __packed;
@@ -708,8 +756,10 @@ struct ec_response_get_protocol_info {
/* The upper byte of .flags tells what to do (nothing means "get") */
#define EC_GSV_SET 0x80000000
/* The lower three bytes of .flags identifies the parameter, if that has
meaning for an individual command. */
/*
* The lower three bytes of .flags identifies the parameter, if that has
* meaning for an individual command.
*/
#define EC_GSV_PARAM_MASK 0x00ffffff
struct ec_params_get_set_value {
@@ -810,6 +860,7 @@ enum ec_feature_code {
#define EC_FEATURE_MASK_0(event_code) (1UL << (event_code % 32))
#define EC_FEATURE_MASK_1(event_code) (1UL << (event_code - 32))
struct ec_response_get_features {
uint32_t flags[2];
} __packed;
@@ -820,24 +871,22 @@ struct ec_response_get_features {
/* Get flash info */
#define EC_CMD_FLASH_INFO 0x10
/* Version 0 returns these fields */
/**
* struct ec_response_flash_info - Response to the flash info command.
* @flash_size: Usable flash size in bytes.
* @write_block_size: Write block size. Write offset and size must be a
* multiple of this.
* @erase_block_size: Erase block size. Erase offset and size must be a
* multiple of this.
* @protect_block_size: Protection block size. Protection offset and size
* must be a multiple of this.
*
* Version 0 returns these fields.
*/
struct ec_response_flash_info {
/* Usable flash size, in bytes */
uint32_t flash_size;
/*
* Write block size. Write offset and size must be a multiple
* of this.
*/
uint32_t write_block_size;
/*
* Erase block size. Erase offset and size must be a multiple
* of this.
*/
uint32_t erase_block_size;
/*
* Protection block size. Protection offset and size must be a
* multiple of this.
*/
uint32_t protect_block_size;
} __packed;
@@ -845,7 +894,22 @@ struct ec_response_flash_info {
/* EC flash erases bits to 0 instead of 1 */
#define EC_FLASH_INFO_ERASE_TO_0 (1 << 0)
/*
/**
* struct ec_response_flash_info_1 - Response to the flash info v1 command.
* @flash_size: Usable flash size in bytes.
* @write_block_size: Write block size. Write offset and size must be a
* multiple of this.
* @erase_block_size: Erase block size. Erase offset and size must be a
* multiple of this.
* @protect_block_size: Protection block size. Protection offset and size
* must be a multiple of this.
* @write_ideal_size: Ideal write size in bytes. Writes will be fastest if
* size is exactly this and offset is a multiple of this.
* For example, an EC may have a write buffer which can do
* half-page operations if data is aligned, and a slower
* word-at-a-time write mode.
* @flags: Flags; see EC_FLASH_INFO_*
*
* Version 1 returns the same initial fields as version 0, with additional
* fields following.
*
@@ -860,15 +924,7 @@ struct ec_response_flash_info_1 {
uint32_t protect_block_size;
/* Version 1 adds these fields: */
/*
* Ideal write size in bytes. Writes will be fastest if size is
* exactly this and offset is a multiple of this. For example, an EC
* may have a write buffer which can do half-page operations if data is
* aligned, and a slower word-at-a-time write mode.
*/
uint32_t write_ideal_size;
/* Flags; see EC_FLASH_INFO_* */
uint32_t flags;
} __packed;
@@ -879,9 +935,14 @@ struct ec_response_flash_info_1 {
*/
#define EC_CMD_FLASH_READ 0x11
/**
* struct ec_params_flash_read - Parameters for the flash read command.
* @offset: Byte offset to read.
* @size: Size to read in bytes.
*/
struct ec_params_flash_read {
uint32_t offset; /* Byte offset to read */
uint32_t size; /* Size to read in bytes */
uint32_t offset;
uint32_t size;
} __packed;
/* Write flash */
@@ -891,18 +952,28 @@ struct ec_params_flash_read {
/* Version 0 of the flash command supported only 64 bytes of data */
#define EC_FLASH_WRITE_VER0_SIZE 64
/**
* struct ec_params_flash_write - Parameters for the flash write command.
* @offset: Byte offset to write.
* @size: Size to write in bytes.
*/
struct ec_params_flash_write {
uint32_t offset; /* Byte offset to write */
uint32_t size; /* Size to write in bytes */
uint32_t offset;
uint32_t size;
/* Followed by data to write */
} __packed;
/* Erase flash */
#define EC_CMD_FLASH_ERASE 0x13
/**
* struct ec_params_flash_erase - Parameters for the flash erase command.
* @offset: Byte offset to erase.
* @size: Size to erase in bytes.
*/
struct ec_params_flash_erase {
uint32_t offset; /* Byte offset to erase */
uint32_t size; /* Size to erase in bytes */
uint32_t offset;
uint32_t size;
} __packed;
/*
@@ -941,21 +1012,28 @@ struct ec_params_flash_erase {
/* Entile flash code protected when the EC boots */
#define EC_FLASH_PROTECT_ALL_AT_BOOT (1 << 6)
/**
* struct ec_params_flash_protect - Parameters for the flash protect command.
* @mask: Bits in flags to apply.
* @flags: New flags to apply.
*/
struct ec_params_flash_protect {
uint32_t mask; /* Bits in flags to apply */
uint32_t flags; /* New flags to apply */
uint32_t mask;
uint32_t flags;
} __packed;
/**
* struct ec_response_flash_protect - Response to the flash protect command.
* @flags: Current value of flash protect flags.
* @valid_flags: Flags which are valid on this platform. This allows the
* caller to distinguish between flags which aren't set vs. flags
* which can't be set on this platform.
* @writable_flags: Flags which can be changed given the current protection
* state.
*/
struct ec_response_flash_protect {
/* Current value of flash protect flags */
uint32_t flags;
/*
* Flags which are valid on this platform. This allows the caller
* to distinguish between flags which aren't set vs. flags which can't
* be set on this platform.
*/
uint32_t valid_flags;
/* Flags which can be changed given the current protection state */
uint32_t writable_flags;
} __packed;
@@ -982,8 +1060,13 @@ enum ec_flash_region {
EC_FLASH_REGION_COUNT,
};
/**
* struct ec_params_flash_region_info - Parameters for the flash region info
* command.
* @region: Flash region; see EC_FLASH_REGION_*
*/
struct ec_params_flash_region_info {
uint32_t region; /* enum ec_flash_region */
uint32_t region;
} __packed;
struct ec_response_flash_region_info {
@@ -1094,7 +1177,9 @@ struct rgb_s {
};
#define LB_BATTERY_LEVELS 4
/* List of tweakable parameters. NOTE: It's __packed so it can be sent in a
/*
* List of tweakable parameters. NOTE: It's __packed so it can be sent in a
* host command, but the alignment is the same regardless. Keep it that way.
*/
struct lightbar_params_v0 {