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mfd: cros-ec: Introduce CEC commands and events definitions.

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The EC can expose a CEC bus, this patch adds the CEC related definitions
needed by the cros-ec-cec driver.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Tested-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Reviewed-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Neil Armstrong 2018-07-04 17:08:19 +02:00 committed by Lee Jones
parent 57e94c8b97
commit f47674e526
1 changed files with 81 additions and 0 deletions
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81
include/linux/mfd/cros_ec_commands.h
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@ -804,6 +804,8 @@ enum ec_feature_code {
EC_FEATURE_MOTION_SENSE_FIFO = 24,
/* EC has RTC feature that can be controlled by host commands */
EC_FEATURE_RTC = 27,
/* EC supports CEC commands */
EC_FEATURE_CEC = 35,
};
#define EC_FEATURE_MASK_0(event_code) (1UL << (event_code % 32))
@ -2078,6 +2080,12 @@ enum ec_mkbp_event {
/* EC sent a sysrq command */
EC_MKBP_EVENT_SYSRQ = 6,
/* Notify the AP that something happened on CEC */
EC_MKBP_EVENT_CEC_EVENT = 8,
/* Send an incoming CEC message to the AP */
EC_MKBP_EVENT_CEC_MESSAGE = 9,
/* Number of MKBP events */
EC_MKBP_EVENT_COUNT,
};
@ -2845,6 +2853,79 @@ struct ec_params_reboot_ec {
#define EC_ACPI_MEM_VERSION_CURRENT 1
/*****************************************************************************/
/*
* HDMI CEC commands
*
* These commands are for sending and receiving message via HDMI CEC
*/
#define EC_MAX_CEC_MSG_LEN 16
/* CEC message from the AP to be written on the CEC bus */
#define EC_CMD_CEC_WRITE_MSG 0x00B8
/**
* struct ec_params_cec_write - Message to write to the CEC bus
* @msg: message content to write to the CEC bus
*/
struct ec_params_cec_write {
uint8_t msg[EC_MAX_CEC_MSG_LEN];
} __packed;
/* Set various CEC parameters */
#define EC_CMD_CEC_SET 0x00BA
/**
* struct ec_params_cec_set - CEC parameters set
* @cmd: parameter type, can be CEC_CMD_ENABLE or CEC_CMD_LOGICAL_ADDRESS
* @val: in case cmd is CEC_CMD_ENABLE, this field can be 0 to disable CEC
* or 1 to enable CEC functionality, in case cmd is CEC_CMD_LOGICAL_ADDRESS,
* this field encodes the requested logical address between 0 and 15
* or 0xff to unregister
*/
struct ec_params_cec_set {
uint8_t cmd; /* enum cec_command */
uint8_t val;
} __packed;
/* Read various CEC parameters */
#define EC_CMD_CEC_GET 0x00BB
/**
* struct ec_params_cec_get - CEC parameters get
* @cmd: parameter type, can be CEC_CMD_ENABLE or CEC_CMD_LOGICAL_ADDRESS
*/
struct ec_params_cec_get {
uint8_t cmd; /* enum cec_command */
} __packed;
/**
* struct ec_response_cec_get - CEC parameters get response
* @val: in case cmd was CEC_CMD_ENABLE, this field will 0 if CEC is
* disabled or 1 if CEC functionality is enabled,
* in case cmd was CEC_CMD_LOGICAL_ADDRESS, this will encode the
* configured logical address between 0 and 15 or 0xff if unregistered
*/
struct ec_response_cec_get {
uint8_t val;
} __packed;
/* CEC parameters command */
enum ec_cec_command {
/* CEC reading, writing and events enable */
CEC_CMD_ENABLE,
/* CEC logical address */
CEC_CMD_LOGICAL_ADDRESS,
};
/* Events from CEC to AP */
enum mkbp_cec_event {
/* Outgoing message was acknowledged by a follower */
EC_MKBP_CEC_SEND_OK = BIT(0),
/* Outgoing message was not acknowledged */
EC_MKBP_CEC_SEND_FAILED = BIT(1),
};
/*****************************************************************************/
/*
* Special commands