mailbox.c File Reference

#include <arch/io.h>
#include <console/console.h>
#include <delay.h>
#include <ec/google/common/mec.h>
#include <string.h>
#include <timer.h>
#include <types.h>
#include "ec.h"

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Data Structures
struct	wilco_ec_request
struct	wilco_ec_response
struct	wilco_ec_message

Macros
#define	EC_MAILBOX_ID   0x00f0
#define	EC_MAILBOX_VERSION   0
#define	EC_MAILBOX_START_COMMAND   0xda
#define	EC_MAILBOX_PROTO_VERSION   3
#define	EC_MAILBOX_DATA_SIZE   32
#define	EC_MAILBOX_DATA_EXTRA   2
#define	EC_MAILBOX_TIMEOUT_MS   MSECS_PER_SEC
#define	EC_CMDR_DATA   BIT(0) /* Data ready for host to read */
#define	EC_CMDR_PENDING   BIT(1) /* Write pending to EC */
#define	EC_CMDR_BUSY   BIT(2) /* EC is busy processing a command */
#define	EC_CMDR_CMD   BIT(3) /* Last host write was a command */

Functions
static bool	wilco_ec_response_timed_out (void)
static uint8_t	wilco_ec_checksum (void *data, size_t size)
static void	wilco_ec_prepare (struct wilco_ec_message *msg, struct wilco_ec_request *rq)
static int	wilco_ec_transfer (struct wilco_ec_message *msg)
int	wilco_ec_mailbox (enum wilco_ec_msg_type type, uint8_t command, const void *request_data, size_t request_size, void *response_data, size_t response_size)
	wilco_ec_mailbox More...

Variables
struct wilco_ec_request	__packed

Macro Definition Documentation

EC_CMDR_BUSY

#define EC_CMDR_BUSY   BIT(2) /* EC is busy processing a command */

Definition at line 37 of file mailbox.c.

EC_CMDR_CMD

#define EC_CMDR_CMD   BIT(3) /* Last host write was a command */

Definition at line 38 of file mailbox.c.

EC_CMDR_DATA

#define EC_CMDR_DATA   BIT(0) /* Data ready for host to read */

Definition at line 35 of file mailbox.c.

EC_CMDR_PENDING

#define EC_CMDR_PENDING   BIT(1) /* Write pending to EC */

Definition at line 36 of file mailbox.c.

EC_MAILBOX_DATA_EXTRA

#define EC_MAILBOX_DATA_EXTRA   2

Definition at line 29 of file mailbox.c.

EC_MAILBOX_DATA_SIZE

#define EC_MAILBOX_DATA_SIZE   32

Definition at line 26 of file mailbox.c.

EC_MAILBOX_ID

#define EC_MAILBOX_ID   0x00f0

Definition at line 14 of file mailbox.c.

EC_MAILBOX_PROTO_VERSION

#define EC_MAILBOX_PROTO_VERSION   3

Definition at line 23 of file mailbox.c.

EC_MAILBOX_START_COMMAND

#define EC_MAILBOX_START_COMMAND   0xda

Definition at line 20 of file mailbox.c.

EC_MAILBOX_TIMEOUT_MS

#define EC_MAILBOX_TIMEOUT_MS   MSECS_PER_SEC

Definition at line 32 of file mailbox.c.

EC_MAILBOX_VERSION

#define EC_MAILBOX_VERSION   0

Definition at line 17 of file mailbox.c.

Function Documentation

wilco_ec_checksum()

static uint8_t wilco_ec_checksum ( void *  data, size_t  size  )

static

Definition at line 93 of file mailbox.c.

References checksum().

Referenced by wilco_ec_prepare().

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wilco_ec_mailbox()

int wilco_ec_mailbox	(	enum wilco_ec_msg_type	type,
		uint8_t	command,
		const void *	request_data,
		size_t	request_size,
		void *	response_data,
		size_t	response_size
	)

wilco_ec_mailbox

Send a command request to the EC mailbox and receive the response.

@type: Mailbox message type, see enum above @command: Command to execute @request_data: Request data buffer @request_size: Number of bytes in request data buffer (max 32) @response_data: Response data buffer @response_size: Number of bytes in response data buffer (max 32)

Returns

number of bytes received, negative error code on failure

Definition at line 195 of file mailbox.c.

References BIOS_ERR, wilco_ec_message::command, wilco_ec_message::data, EC_MAILBOX_DATA_SIZE, memcpy(), printk, wilco_ec_message::request_size, wilco_ec_message::response_size, wilco_ec_message::result, type, and wilco_ec_transfer().

Referenced by die_notify(), wilco_ec_change_wake(), wilco_ec_get_board_id(), wilco_ec_power_off(), wilco_ec_radio_control(), wilco_ec_send(), wilco_ec_send_noargs(), wilco_ec_sendrecv(), wilco_ec_sendrecv_noargs(), wilco_ec_set_cpuid(), and wilco_ec_slp_en().

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wilco_ec_prepare()

static void wilco_ec_prepare ( struct wilco_ec_message *  msg, struct wilco_ec_request *  rq  )

static

Definition at line 105 of file mailbox.c.

References wilco_ec_request::checksum, wilco_ec_request::command, wilco_ec_message::command, wilco_ec_message::data, wilco_ec_request::data_size, EC_MAILBOX_DATA_EXTRA, EC_MAILBOX_ID, EC_MAILBOX_PROTO_VERSION, EC_MAILBOX_VERSION, wilco_ec_request::mailbox_id, wilco_ec_request::mailbox_version, memset(), wilco_ec_message::request_size, wilco_ec_request::struct_version, and wilco_ec_checksum().

Referenced by wilco_ec_transfer().

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wilco_ec_response_timed_out()

static bool wilco_ec_response_timed_out ( void  )

static

Definition at line 75 of file mailbox.c.

References BIOS_ERR, EC_CMDR_BUSY, EC_CMDR_PENDING, EC_MAILBOX_TIMEOUT_MS, inb(), mask, mdelay(), printk, stopwatch_expired(), and stopwatch_init_msecs_expire().

Referenced by wilco_ec_transfer().

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wilco_ec_transfer()

static int wilco_ec_transfer ( struct wilco_ec_message *  msg )

static

Definition at line 123 of file mailbox.c.

References BIOS_DEBUG, BIOS_ERR, checksum(), wilco_ec_response::data, wilco_ec_message::data, wilco_ec_response::data_size, EC_MAILBOX_DATA_SIZE, EC_MAILBOX_START_COMMAND, inb(), mec_io_bytes(), MEC_IO_READ, MEC_IO_WRITE, memcpy(), outb(), printk, wilco_ec_message::request_size, wilco_ec_message::response_size, wilco_ec_response::result, wilco_ec_message::result, wilco_ec_message::type, WILCO_EC_MSG_DEFAULT, WILCO_EC_MSG_NO_RESPONSE, wilco_ec_prepare(), and wilco_ec_response_timed_out().

Referenced by wilco_ec_mailbox().

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Variable Documentation

__packed

struct wilco_ec_response __packed