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ec/google/wilco: Add mailbox helper functions 

Add helper functions that make it more convenient to send and receive
the most common types of commands to the Wilco embedded controller.

Change-Id: I9cee1a3b2f9d507f6ecdfae9f4a34ba59056cb91
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: https://review.coreboot.org/29114
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Duncan Laurie 2018-10-15 02:11:30 +00:00 committed by Duncan Laurie
parent 21dde8b25f
commit 5f6f1dab7d
1 changed files with 73 additions and 0 deletions
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73
src/ec/google/wilco/ec.h
View File

@ -44,4 +44,77 @@ int wilco_ec_mailbox(enum wilco_ec_msg_type type, uint8_t command,
const void *request_data, size_t request_size, const void *request_data, size_t request_size,
void *response_data, size_t response_size); void *response_data, size_t response_size);
/**
* wilco_ec_send
*
* Send a basic EC command with a one byte parameter with no
* returned data;
*
* @command: Command to execute
* @param: Command parameter to send
*
* @return negative error code on failure
*/
static inline int wilco_ec_send(uint8_t command, uint8_t param)
{
return wilco_ec_mailbox(WILCO_EC_MSG_DEFAULT, command,
&param, sizeof(param), NULL, 0);
}
/**
* wilco_ec_send_noargs
*
* Send a basic EC command with no parameters and no returned data.
*
* @command: Command to execute
*
* @return negative error code on failure
*/
static inline int wilco_ec_send_noargs(uint8_t command)
{
return wilco_ec_mailbox(WILCO_EC_MSG_DEFAULT, command,
NULL, 0, NULL, 0);
}
/**
* wilco_ec_sendrecv
*
* Send a basic EC command with a one byte parameter, ignoring the
* first byte of returned data to match the common behavior.
* The maximum response size is 31 due to the ignored byte.
*
* @command: Command to execute
* @param: Command parameter to send
* @data: Response data buffer
* @size: Number of bytes in response data buffer (max 31)
*
* @return number of bytes received, negative error code on failure
*/
static inline int wilco_ec_sendrecv(uint8_t command, uint8_t param,
void *data, size_t size)
{
return wilco_ec_mailbox(WILCO_EC_MSG_DEFAULT, command,
&param, sizeof(param), data, size);
}
/**
* wilco_ec_sendrecv_noargs
*
* Send a basic EC command with no parameters, ignoring the
* first byte of returned data to match the common behavior.
* The maximum response size is 31 due to the ignored byte.
*
* @command: Command to execute
* @data: Response data buffer
* @size: Number of bytes in response data buffer (max 31)
*
* @return number of bytes received, negative error code on failure
*/
static inline int wilco_ec_sendrecv_noargs(uint8_t command,
void *data, size_t size)
{
return wilco_ec_mailbox(WILCO_EC_MSG_DEFAULT, command,
NULL, 0, data, size);
}
#endif /* EC_GOOGLE_WILCO_EC_H */ #endif /* EC_GOOGLE_WILCO_EC_H */