summaryrefslogtreecommitdiffstats
path: root/include/linux/mfd
diff options
context:
space:
mode:
authorNeil Armstrong <narmstrong@baylibre.com>2018-07-04 17:08:19 +0200
committerLee Jones <lee.jones@linaro.org>2018-07-13 08:44:36 +0100
commitf47674e5263dfe0f89a640fc8b7dc54f9b79d5db (patch)
tree8302ab3ac62d79f7aaf5db65eb3e72745b3b2da7 /include/linux/mfd
parent57e94c8b974db2d83c60e1139c89a70806abbea0 (diff)
downloadlinux-stable-f47674e5263dfe0f89a640fc8b7dc54f9b79d5db.tar.gz
linux-stable-f47674e5263dfe0f89a640fc8b7dc54f9b79d5db.tar.bz2
linux-stable-f47674e5263dfe0f89a640fc8b7dc54f9b79d5db.zip
mfd: cros-ec: Introduce CEC commands and events definitions.
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>
Diffstat (limited to 'include/linux/mfd')
-rw-r--r--include/linux/mfd/cros_ec_commands.h81
1 files changed, 81 insertions, 0 deletions
diff --git a/include/linux/mfd/cros_ec_commands.h b/include/linux/mfd/cros_ec_commands.h
index c4f0caa642be..5079bc2d4378 100644
--- a/include/linux/mfd/cros_ec_commands.h
+++ b/include/linux/mfd/cros_ec_commands.h
@@ -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,
};
@@ -2847,6 +2855,79 @@ struct ec_params_reboot_ec {
/*****************************************************************************/
/*
+ * 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
*
* These do not follow the normal rules for commands. See each command for