/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */

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/*

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* cec - HDMI Consumer Electronics Control public header

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*

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* Copyright 2016 Cisco Systems, Inc. and/or its affiliates. All rights reserved.

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*/

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#ifndef _CEC_UAPI_H

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#define _CEC_UAPI_H

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#include <linux/types.h>

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#include <linux/string.h>

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#define CEC_MAX_MSG_SIZE 16

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/**

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* struct cec_msg - CEC message structure.

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* @tx_ts: Timestamp in nanoseconds using CLOCK_MONOTONIC. Set by the

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* driver when the message transmission has finished.

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* @rx_ts: Timestamp in nanoseconds using CLOCK_MONOTONIC. Set by the

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* driver when the message was received.

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* @len: Length in bytes of the message.

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* @timeout: The timeout (in ms) that is used to timeout CEC_RECEIVE.

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* Set to 0 if you want to wait forever. This timeout can also be

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* used with CEC_TRANSMIT as the timeout for waiting for a reply.

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* If 0, then it will use a 1 second timeout instead of waiting

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* forever as is done with CEC_RECEIVE.

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* @sequence: The framework assigns a sequence number to messages that are

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* sent. This can be used to track replies to previously sent

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* messages.

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* @flags: Set to 0.

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* @msg: The message payload.

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* @reply: This field is ignored with CEC_RECEIVE and is only used by

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* CEC_TRANSMIT. If non-zero, then wait for a reply with this

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* opcode. Set to CEC_MSG_FEATURE_ABORT if you want to wait for

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* a possible ABORT reply. If there was an error when sending the

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* msg or FeatureAbort was returned, then reply is set to 0.

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* If reply is non-zero upon return, then len/msg are set to

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* the received message.

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* If reply is zero upon return and status has the

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* CEC_TX_STATUS_FEATURE_ABORT bit set, then len/msg are set to

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* the received feature abort message.

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* If reply is zero upon return and status has the

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* CEC_TX_STATUS_MAX_RETRIES bit set, then no reply was seen at

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* all. If reply is non-zero for CEC_TRANSMIT and the message is a

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* broadcast, then -EINVAL is returned.

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* if reply is non-zero, then timeout is set to 1000 (the required

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* maximum response time).

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* @rx_status: The message receive status bits. Set by the driver.

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* @tx_status: The message transmit status bits. Set by the driver.

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* @tx_arb_lost_cnt: The number of 'Arbitration Lost' events. Set by the driver.

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* @tx_nack_cnt: The number of 'Not Acknowledged' events. Set by the driver.

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* @tx_low_drive_cnt: The number of 'Low Drive Detected' events. Set by the

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* driver.

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* @tx_error_cnt: The number of 'Error' events. Set by the driver.

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*/

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struct cec_msg {

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__u64 tx_ts;

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__u64 rx_ts;

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__u32 len;

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__u32 timeout;

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__u32 sequence;

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__u32 flags;

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__u8 msg[CEC_MAX_MSG_SIZE];

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__u8 reply;

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__u8 rx_status;

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__u8 tx_status;

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__u8 tx_arb_lost_cnt;

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__u8 tx_nack_cnt;

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__u8 tx_low_drive_cnt;

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__u8 tx_error_cnt;

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};

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/**

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* cec_msg_initiator - return the initiator's logical address.

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* @msg: the message structure

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*/

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static __inline__ __u8 cec_msg_initiator(const struct cec_msg *msg)

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{

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return msg->msg[0] >> 4;

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}

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/**

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* cec_msg_destination - return the destination's logical address.

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* @msg: the message structure

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*/

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static __inline__ __u8 cec_msg_destination(const struct cec_msg *msg)

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{

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return msg->msg[0] & 0xf;

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}

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/**

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* cec_msg_opcode - return the opcode of the message, -1 for poll

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* @msg: the message structure

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*/

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static __inline__ int cec_msg_opcode(const struct cec_msg *msg)

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{

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return msg->len > 1 ? msg->msg[1] : -1;

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}

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/**

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* cec_msg_is_broadcast - return true if this is a broadcast message.

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* @msg: the message structure

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*/

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static __inline__ int cec_msg_is_broadcast(const struct cec_msg *msg)

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{

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return (msg->msg[0] & 0xf) == 0xf;

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}

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/**

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* cec_msg_init - initialize the message structure.

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* @msg: the message structure

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* @initiator: the logical address of the initiator

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* @destination:the logical address of the destination (0xf for broadcast)

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*

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* The whole structure is zeroed, the len field is set to 1 (i.e. a poll

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* message) and the initiator and destination are filled in.

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*/

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static __inline__ void cec_msg_init(struct cec_msg *msg,

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__u8 initiator, __u8 destination)

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{

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memset(msg, 0, sizeof(*msg));

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msg->msg[0] = (initiator << 4) | destination;

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msg->len = 1;

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}

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/**

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* cec_msg_set_reply_to - fill in destination/initiator in a reply message.

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* @msg: the message structure for the reply

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* @orig: the original message structure

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*

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* Set the msg destination to the orig initiator and the msg initiator to the

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* orig destination. Note that msg and orig may be the same pointer, in which

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* case the change is done in place.

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*/

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static __inline__ void cec_msg_set_reply_to(struct cec_msg *msg,

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struct cec_msg *orig)

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{

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/* The destination becomes the initiator and vice versa */

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msg->msg[0] = (cec_msg_destination(orig) << 4) |

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cec_msg_initiator(orig);

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msg->reply = msg->timeout = 0;

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}

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/* cec_msg flags field */

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#define CEC_MSG_FL_REPLY_TO_FOLLOWERS (1 << 0)

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#define CEC_MSG_FL_RAW (1 << 1)

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/* cec_msg tx/rx_status field */

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#define CEC_TX_STATUS_OK (1 << 0)

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#define CEC_TX_STATUS_ARB_LOST (1 << 1)

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#define CEC_TX_STATUS_NACK (1 << 2)

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#define CEC_TX_STATUS_LOW_DRIVE (1 << 3)

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#define CEC_TX_STATUS_ERROR (1 << 4)

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#define CEC_TX_STATUS_MAX_RETRIES (1 << 5)

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#define CEC_TX_STATUS_ABORTED (1 << 6)

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#define CEC_TX_STATUS_TIMEOUT (1 << 7)

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#define CEC_RX_STATUS_OK (1 << 0)

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#define CEC_RX_STATUS_TIMEOUT (1 << 1)

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#define CEC_RX_STATUS_FEATURE_ABORT (1 << 2)

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#define CEC_RX_STATUS_ABORTED (1 << 3)

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static __inline__ int cec_msg_status_is_ok(const struct cec_msg *msg)

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{

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if (msg->tx_status && !(msg->tx_status & CEC_TX_STATUS_OK))

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return 0;

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if (msg->rx_status && !(msg->rx_status & CEC_RX_STATUS_OK))

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return 0;

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if (!msg->tx_status && !msg->rx_status)

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return 0;

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return !(msg->rx_status & CEC_RX_STATUS_FEATURE_ABORT);

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}

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#define CEC_LOG_ADDR_INVALID 0xff

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#define CEC_PHYS_ADDR_INVALID 0xffff

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/*

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* The maximum number of logical addresses one device can be assigned to.

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* The CEC 2.0 spec allows for only 2 logical addresses at the moment. The

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* Analog Devices CEC hardware supports 3. So let's go wild and go for 4.

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*/

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#define CEC_MAX_LOG_ADDRS 4

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/* The logical addresses defined by CEC 2.0 */

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#define CEC_LOG_ADDR_TV 0

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#define CEC_LOG_ADDR_RECORD_1 1

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#define CEC_LOG_ADDR_RECORD_2 2

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#define CEC_LOG_ADDR_TUNER_1 3

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#define CEC_LOG_ADDR_PLAYBACK_1 4

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#define CEC_LOG_ADDR_AUDIOSYSTEM 5

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#define CEC_LOG_ADDR_TUNER_2 6

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#define CEC_LOG_ADDR_TUNER_3 7

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#define CEC_LOG_ADDR_PLAYBACK_2 8

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#define CEC_LOG_ADDR_RECORD_3 9

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#define CEC_LOG_ADDR_TUNER_4 10

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#define CEC_LOG_ADDR_PLAYBACK_3 11

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#define CEC_LOG_ADDR_BACKUP_1 12

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#define CEC_LOG_ADDR_BACKUP_2 13

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#define CEC_LOG_ADDR_SPECIFIC 14

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#define CEC_LOG_ADDR_UNREGISTERED 15 /* as initiator address */

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#define CEC_LOG_ADDR_BROADCAST 15 /* as destination address */

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/* The logical address types that the CEC device wants to claim */

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#define CEC_LOG_ADDR_TYPE_TV 0

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#define CEC_LOG_ADDR_TYPE_RECORD 1

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#define CEC_LOG_ADDR_TYPE_TUNER 2

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#define CEC_LOG_ADDR_TYPE_PLAYBACK 3

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#define CEC_LOG_ADDR_TYPE_AUDIOSYSTEM 4

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#define CEC_LOG_ADDR_TYPE_SPECIFIC 5

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#define CEC_LOG_ADDR_TYPE_UNREGISTERED 6

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/*

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* Switches should use UNREGISTERED.

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* Processors should use SPECIFIC.

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*/

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#define CEC_LOG_ADDR_MASK_TV (1 << CEC_LOG_ADDR_TV)

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#define CEC_LOG_ADDR_MASK_RECORD ((1 << CEC_LOG_ADDR_RECORD_1) | \

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(1 << CEC_LOG_ADDR_RECORD_2) | \

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(1 << CEC_LOG_ADDR_RECORD_3))

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#define CEC_LOG_ADDR_MASK_TUNER ((1 << CEC_LOG_ADDR_TUNER_1) | \

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(1 << CEC_LOG_ADDR_TUNER_2) | \

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(1 << CEC_LOG_ADDR_TUNER_3) | \

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(1 << CEC_LOG_ADDR_TUNER_4))

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#define CEC_LOG_ADDR_MASK_PLAYBACK ((1 << CEC_LOG_ADDR_PLAYBACK_1) | \

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(1 << CEC_LOG_ADDR_PLAYBACK_2) | \

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(1 << CEC_LOG_ADDR_PLAYBACK_3))

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#define CEC_LOG_ADDR_MASK_AUDIOSYSTEM (1 << CEC_LOG_ADDR_AUDIOSYSTEM)

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#define CEC_LOG_ADDR_MASK_BACKUP ((1 << CEC_LOG_ADDR_BACKUP_1) | \

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(1 << CEC_LOG_ADDR_BACKUP_2))

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#define CEC_LOG_ADDR_MASK_SPECIFIC (1 << CEC_LOG_ADDR_SPECIFIC)

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#define CEC_LOG_ADDR_MASK_UNREGISTERED (1 << CEC_LOG_ADDR_UNREGISTERED)

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static __inline__ int cec_has_tv(__u16 log_addr_mask)

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{

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return log_addr_mask & CEC_LOG_ADDR_MASK_TV;

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}

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static __inline__ int cec_has_record(__u16 log_addr_mask)

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{

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return log_addr_mask & CEC_LOG_ADDR_MASK_RECORD;

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}

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static __inline__ int cec_has_tuner(__u16 log_addr_mask)

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{

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return log_addr_mask & CEC_LOG_ADDR_MASK_TUNER;

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}

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static __inline__ int cec_has_playback(__u16 log_addr_mask)

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{

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return log_addr_mask & CEC_LOG_ADDR_MASK_PLAYBACK;

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}

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static __inline__ int cec_has_audiosystem(__u16 log_addr_mask)

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{

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return log_addr_mask & CEC_LOG_ADDR_MASK_AUDIOSYSTEM;

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}

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static __inline__ int cec_has_backup(__u16 log_addr_mask)

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{

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return log_addr_mask & CEC_LOG_ADDR_MASK_BACKUP;

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}

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static __inline__ int cec_has_specific(__u16 log_addr_mask)

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{

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return log_addr_mask & CEC_LOG_ADDR_MASK_SPECIFIC;

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}

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static __inline__ int cec_is_unregistered(__u16 log_addr_mask)

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{

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return log_addr_mask & CEC_LOG_ADDR_MASK_UNREGISTERED;

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}

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static __inline__ int cec_is_unconfigured(__u16 log_addr_mask)

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{

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return log_addr_mask == 0;

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}

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/*

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* Use this if there is no vendor ID (CEC_G_VENDOR_ID) or if the vendor ID

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* should be disabled (CEC_S_VENDOR_ID)

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*/

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#define CEC_VENDOR_ID_NONE 0xffffffff

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/* The message handling modes */

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/* Modes for initiator */

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#define CEC_MODE_NO_INITIATOR (0x0 << 0)

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#define CEC_MODE_INITIATOR (0x1 << 0)

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#define CEC_MODE_EXCL_INITIATOR (0x2 << 0)

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#define CEC_MODE_INITIATOR_MSK 0x0f

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/* Modes for follower */

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#define CEC_MODE_NO_FOLLOWER (0x0 << 4)

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#define CEC_MODE_FOLLOWER (0x1 << 4)

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#define CEC_MODE_EXCL_FOLLOWER (0x2 << 4)

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#define CEC_MODE_EXCL_FOLLOWER_PASSTHRU (0x3 << 4)

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#define CEC_MODE_MONITOR_PIN (0xd << 4)

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#define CEC_MODE_MONITOR (0xe << 4)

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#define CEC_MODE_MONITOR_ALL (0xf << 4)

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#define CEC_MODE_FOLLOWER_MSK 0xf0

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/* Userspace has to configure the physical address */

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#define CEC_CAP_PHYS_ADDR (1 << 0)

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/* Userspace has to configure the logical addresses */

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#define CEC_CAP_LOG_ADDRS (1 << 1)

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/* Userspace can transmit messages (and thus become follower as well) */

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#define CEC_CAP_TRANSMIT (1 << 2)

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/*

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* Passthrough all messages instead of processing them.

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*/

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#define CEC_CAP_PASSTHROUGH (1 << 3)

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/* Supports remote control */

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#define CEC_CAP_RC (1 << 4)

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/* Hardware can monitor all messages, not just directed and broadcast. */

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#define CEC_CAP_MONITOR_ALL (1 << 5)

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/* Hardware can use CEC only if the HDMI HPD pin is high. */

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#define CEC_CAP_NEEDS_HPD (1 << 6)

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/* Hardware can monitor CEC pin transitions */

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#define CEC_CAP_MONITOR_PIN (1 << 7)

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/* CEC_ADAP_G_CONNECTOR_INFO is available */

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#define CEC_CAP_CONNECTOR_INFO (1 << 8)

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/**

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* struct cec_caps - CEC capabilities structure.

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* @driver: name of the CEC device driver.

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* @name: name of the CEC device. @driver + @name must be unique.

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* @available_log_addrs: number of available logical addresses.

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* @capabilities: capabilities of the CEC adapter.

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* @version: version of the CEC adapter framework.

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*/

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struct cec_caps {

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char driver[32];

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char name[32];

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__u32 available_log_addrs;

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__u32 capabilities;

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__u32 version;

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};

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/**

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* struct cec_log_addrs - CEC logical addresses structure.

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* @log_addr: the claimed logical addresses. Set by the driver.

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* @log_addr_mask: current logical address mask. Set by the driver.

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* @cec_version: the CEC version that the adapter should implement. Set by the

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* caller.

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* @num_log_addrs: how many logical addresses should be claimed. Set by the

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* caller.

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* @vendor_id: the vendor ID of the device. Set by the caller.

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* @flags: flags.

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* @osd_name: the OSD name of the device. Set by the caller.

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* @primary_device_type: the primary device type for each logical address.

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* Set by the caller.

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* @log_addr_type: the logical address types. Set by the caller.

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* @all_device_types: CEC 2.0: all device types represented by the logical

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* address. Set by the caller.

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* @features: CEC 2.0: The logical address features. Set by the caller.

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*/

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struct cec_log_addrs {

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__u8 log_addr[CEC_MAX_LOG_ADDRS];

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__u16 log_addr_mask;

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__u8 cec_version;

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__u8 num_log_addrs;

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__u32 vendor_id;

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__u32 flags;

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char osd_name[15];

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__u8 primary_device_type[CEC_MAX_LOG_ADDRS];

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__u8 log_addr_type[CEC_MAX_LOG_ADDRS];

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/* CEC 2.0 */

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__u8 all_device_types[CEC_MAX_LOG_ADDRS];

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__u8 features[CEC_MAX_LOG_ADDRS][12];

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};

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/* Allow a fallback to unregistered */

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#define CEC_LOG_ADDRS_FL_ALLOW_UNREG_FALLBACK (1 << 0)

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/* Passthrough RC messages to the input subsystem */

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#define CEC_LOG_ADDRS_FL_ALLOW_RC_PASSTHRU (1 << 1)

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/* CDC-Only device: supports only CDC messages */

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#define CEC_LOG_ADDRS_FL_CDC_ONLY (1 << 2)

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/**

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* struct cec_drm_connector_info - tells which drm connector is

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* associated with the CEC adapter.

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* @card_no: drm card number

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* @connector_id: drm connector ID

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*/

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struct cec_drm_connector_info {

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__u32 card_no;

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__u32 connector_id;

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};

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#define CEC_CONNECTOR_TYPE_NO_CONNECTOR 0

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#define CEC_CONNECTOR_TYPE_DRM 1

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/**

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* struct cec_connector_info - tells if and which connector is

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* associated with the CEC adapter.

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* @type: connector type (if any)

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* @drm: drm connector info

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*/

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struct cec_connector_info {

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__u32 type;

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union {

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struct cec_drm_connector_info drm;

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__u32 raw[16];

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};

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};

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/* Events */

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/* Event that occurs when the adapter state changes */

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#define CEC_EVENT_STATE_CHANGE 1

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/*

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* This event is sent when messages are lost because the application

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* didn't empty the message queue in time

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*/

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#define CEC_EVENT_LOST_MSGS 2

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#define CEC_EVENT_PIN_CEC_LOW 3

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#define CEC_EVENT_PIN_CEC_HIGH 4

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#define CEC_EVENT_PIN_HPD_LOW 5

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#define CEC_EVENT_PIN_HPD_HIGH 6

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#define CEC_EVENT_PIN_5V_LOW 7

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#define CEC_EVENT_PIN_5V_HIGH 8

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#define CEC_EVENT_FL_INITIAL_STATE (1 << 0)

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#define CEC_EVENT_FL_DROPPED_EVENTS (1 << 1)

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/**

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* struct cec_event_state_change - used when the CEC adapter changes state.

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* @phys_addr: the current physical address

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* @log_addr_mask: the current logical address mask

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* @have_conn_info: if non-zero, then HDMI connector information is available.

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* This field is only valid if CEC_CAP_CONNECTOR_INFO is set. If that

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* capability is set and @have_conn_info is zero, then that indicates

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* that the HDMI connector device is not instantiated, either because

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* the HDMI driver is still configuring the device or because the HDMI

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* device was unbound.

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*/

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struct cec_event_state_change {

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__u16 phys_addr;

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__u16 log_addr_mask;

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__u16 have_conn_info;

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};

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/**

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* struct cec_event_lost_msgs - tells you how many messages were lost.

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* @lost_msgs: how many messages were lost.

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*/

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struct cec_event_lost_msgs {

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__u32 lost_msgs;

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};

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[450] Fix | Delete

/**

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* struct cec_event - CEC event structure

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* @ts: the timestamp of when the event was sent.

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* @event: the event.

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* array.

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* @state_change: the event payload for CEC_EVENT_STATE_CHANGE.

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* @lost_msgs: the event payload for CEC_EVENT_LOST_MSGS.

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* @raw: array to pad the union.

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*/

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struct cec_event {

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__u64 ts;

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__u32 event;

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__u32 flags;

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union {

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struct cec_event_state_change state_change;

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struct cec_event_lost_msgs lost_msgs;

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__u32 raw[16];

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};

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};

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/* ioctls */

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/* Adapter capabilities */

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#define CEC_ADAP_G_CAPS _IOWR('a', 0, struct cec_caps)

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/*

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* phys_addr is either 0 (if this is the CEC root device)

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* or a valid physical address obtained from the sink's EDID

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* as read by this CEC device (if this is a source device)

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* or a physical address obtained and modified from a sink

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* EDID and used for a sink CEC device.

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* If nothing is connected, then phys_addr is 0xffff.

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* See HDMI 1.4b, section 8.7 (Physical Address).

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*

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* The CEC_ADAP_S_PHYS_ADDR ioctl may not be available if that is handled

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* internally.

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*/

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#define CEC_ADAP_G_PHYS_ADDR _IOR('a', 1, __u16)

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#define CEC_ADAP_S_PHYS_ADDR _IOW('a', 2, __u16)

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/*

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* Configure the CEC adapter. It sets the device type and which

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* logical types it will try to claim. It will return which

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* logical addresses it could actually claim.

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* An error is returned if the adapter is disabled or if there

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* is no physical address assigned.

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*/

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#define CEC_ADAP_G_LOG_ADDRS _IOR('a', 3, struct cec_log_addrs)

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