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Diffstat (limited to 'include_all/hardware/hdmi_cec.h')
| -rw-r--r-- | include_all/hardware/hdmi_cec.h | 429 |
1 files changed, 429 insertions, 0 deletions
diff --git a/include_all/hardware/hdmi_cec.h b/include_all/hardware/hdmi_cec.h new file mode 100644 index 00000000..aa06384e --- /dev/null +++ b/include_all/hardware/hdmi_cec.h @@ -0,0 +1,429 @@ +/* + * Copyright (C) 2014 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef ANDROID_INCLUDE_HARDWARE_HDMI_CEC_H +#define ANDROID_INCLUDE_HARDWARE_HDMI_CEC_H + +#include <stdint.h> +#include <sys/cdefs.h> + +#include <hardware/hardware.h> + +__BEGIN_DECLS + +#define HDMI_CEC_MODULE_API_VERSION_1_0 HARDWARE_MODULE_API_VERSION(1, 0) +#define HDMI_CEC_MODULE_API_VERSION_CURRENT HDMI_MODULE_API_VERSION_1_0 + +#define HDMI_CEC_DEVICE_API_VERSION_1_0 HARDWARE_DEVICE_API_VERSION(1, 0) +#define HDMI_CEC_DEVICE_API_VERSION_CURRENT HDMI_DEVICE_API_VERSION_1_0 + +#define HDMI_CEC_HARDWARE_MODULE_ID "hdmi_cec" +#define HDMI_CEC_HARDWARE_INTERFACE "hdmi_cec_hw_if" + +typedef enum cec_device_type { + CEC_DEVICE_INACTIVE = -1, + CEC_DEVICE_TV = 0, + CEC_DEVICE_RECORDER = 1, + CEC_DEVICE_RESERVED = 2, + CEC_DEVICE_TUNER = 3, + CEC_DEVICE_PLAYBACK = 4, + CEC_DEVICE_AUDIO_SYSTEM = 5, + CEC_DEVICE_MAX = CEC_DEVICE_AUDIO_SYSTEM +} cec_device_type_t; + +typedef enum cec_logical_address { + CEC_ADDR_TV = 0, + CEC_ADDR_RECORDER_1 = 1, + CEC_ADDR_RECORDER_2 = 2, + CEC_ADDR_TUNER_1 = 3, + CEC_ADDR_PLAYBACK_1 = 4, + CEC_ADDR_AUDIO_SYSTEM = 5, + CEC_ADDR_TUNER_2 = 6, + CEC_ADDR_TUNER_3 = 7, + CEC_ADDR_PLAYBACK_2 = 8, + CEC_ADDR_RECORDER_3 = 9, + CEC_ADDR_TUNER_4 = 10, + CEC_ADDR_PLAYBACK_3 = 11, + CEC_ADDR_RESERVED_1 = 12, + CEC_ADDR_RESERVED_2 = 13, + CEC_ADDR_FREE_USE = 14, + CEC_ADDR_UNREGISTERED = 15, + CEC_ADDR_BROADCAST = 15 +} cec_logical_address_t; + +/* + * HDMI CEC messages + */ +enum cec_message_type { + CEC_MESSAGE_FEATURE_ABORT = 0x00, + CEC_MESSAGE_IMAGE_VIEW_ON = 0x04, + CEC_MESSAGE_TUNER_STEP_INCREMENT = 0x05, + CEC_MESSAGE_TUNER_STEP_DECREMENT = 0x06, + CEC_MESSAGE_TUNER_DEVICE_STATUS = 0x07, + CEC_MESSAGE_GIVE_TUNER_DEVICE_STATUS = 0x08, + CEC_MESSAGE_RECORD_ON = 0x09, + CEC_MESSAGE_RECORD_STATUS = 0x0A, + CEC_MESSAGE_RECORD_OFF = 0x0B, + CEC_MESSAGE_TEXT_VIEW_ON = 0x0D, + CEC_MESSAGE_RECORD_TV_SCREEN = 0x0F, + CEC_MESSAGE_GIVE_DECK_STATUS = 0x1A, + CEC_MESSAGE_DECK_STATUS = 0x1B, + CEC_MESSAGE_SET_MENU_LANGUAGE = 0x32, + CEC_MESSAGE_CLEAR_ANALOG_TIMER = 0x33, + CEC_MESSAGE_SET_ANALOG_TIMER = 0x34, + CEC_MESSAGE_TIMER_STATUS = 0x35, + CEC_MESSAGE_STANDBY = 0x36, + CEC_MESSAGE_PLAY = 0x41, + CEC_MESSAGE_DECK_CONTROL = 0x42, + CEC_MESSAGE_TIMER_CLEARED_STATUS = 0x043, + CEC_MESSAGE_USER_CONTROL_PRESSED = 0x44, + CEC_MESSAGE_USER_CONTROL_RELEASED = 0x45, + CEC_MESSAGE_GIVE_OSD_NAME = 0x46, + CEC_MESSAGE_SET_OSD_NAME = 0x47, + CEC_MESSAGE_SET_OSD_STRING = 0x64, + CEC_MESSAGE_SET_TIMER_PROGRAM_TITLE = 0x67, + CEC_MESSAGE_SYSTEM_AUDIO_MODE_REQUEST = 0x70, + CEC_MESSAGE_GIVE_AUDIO_STATUS = 0x71, + CEC_MESSAGE_SET_SYSTEM_AUDIO_MODE = 0x72, + CEC_MESSAGE_REPORT_AUDIO_STATUS = 0x7A, + CEC_MESSAGE_GIVE_SYSTEM_AUDIO_MODE_STATUS = 0x7D, + CEC_MESSAGE_SYSTEM_AUDIO_MODE_STATUS = 0x7E, + CEC_MESSAGE_ROUTING_CHANGE = 0x80, + CEC_MESSAGE_ROUTING_INFORMATION = 0x81, + CEC_MESSAGE_ACTIVE_SOURCE = 0x82, + CEC_MESSAGE_GIVE_PHYSICAL_ADDRESS = 0x83, + CEC_MESSAGE_REPORT_PHYSICAL_ADDRESS = 0x84, + CEC_MESSAGE_REQUEST_ACTIVE_SOURCE = 0x85, + CEC_MESSAGE_SET_STREAM_PATH = 0x86, + CEC_MESSAGE_DEVICE_VENDOR_ID = 0x87, + CEC_MESSAGE_VENDOR_COMMAND = 0x89, + CEC_MESSAGE_VENDOR_REMOTE_BUTTON_DOWN = 0x8A, + CEC_MESSAGE_VENDOR_REMOTE_BUTTON_UP = 0x8B, + CEC_MESSAGE_GIVE_DEVICE_VENDOR_ID = 0x8C, + CEC_MESSAGE_MENU_REQUEST = 0x8D, + CEC_MESSAGE_MENU_STATUS = 0x8E, + CEC_MESSAGE_GIVE_DEVICE_POWER_STATUS = 0x8F, + CEC_MESSAGE_REPORT_POWER_STATUS = 0x90, + CEC_MESSAGE_GET_MENU_LANGUAGE = 0x91, + CEC_MESSAGE_SELECT_ANALOG_SERVICE = 0x92, + CEC_MESSAGE_SELECT_DIGITAL_SERVICE = 0x93, + CEC_MESSAGE_SET_DIGITAL_TIMER = 0x97, + CEC_MESSAGE_CLEAR_DIGITAL_TIMER = 0x99, + CEC_MESSAGE_SET_AUDIO_RATE = 0x9A, + CEC_MESSAGE_INACTIVE_SOURCE = 0x9D, + CEC_MESSAGE_CEC_VERSION = 0x9E, + CEC_MESSAGE_GET_CEC_VERSION = 0x9F, + CEC_MESSAGE_VENDOR_COMMAND_WITH_ID = 0xA0, + CEC_MESSAGE_CLEAR_EXTERNAL_TIMER = 0xA1, + CEC_MESSAGE_SET_EXTERNAL_TIMER = 0xA2, + CEC_MESSAGE_INITIATE_ARC = 0xC0, + CEC_MESSAGE_REPORT_ARC_INITIATED = 0xC1, + CEC_MESSAGE_REPORT_ARC_TERMINATED = 0xC2, + CEC_MESSAGE_REQUEST_ARC_INITIATION = 0xC3, + CEC_MESSAGE_REQUEST_ARC_TERMINATION = 0xC4, + CEC_MESSAGE_TERMINATE_ARC = 0xC5, + CEC_MESSAGE_ABORT = 0xFF +}; + +/* + * Operand description [Abort Reason] + */ +enum abort_reason { + ABORT_UNRECOGNIZED_MODE = 0, + ABORT_NOT_IN_CORRECT_MODE = 1, + ABORT_CANNOT_PROVIDE_SOURCE = 2, + ABORT_INVALID_OPERAND = 3, + ABORT_REFUSED = 4, + ABORT_UNABLE_TO_DETERMINE = 5 +}; + +/* + * HDMI event type. used for hdmi_event_t. + */ +enum { + HDMI_EVENT_CEC_MESSAGE = 1, + HDMI_EVENT_HOT_PLUG = 2, +}; + +/* + * HDMI hotplug event type. Used when the event + * type is HDMI_EVENT_HOT_PLUG. + */ +enum { + HDMI_NOT_CONNECTED = 0, + HDMI_CONNECTED = 1 +}; + +/* + * error code used for send_message. + */ +enum { + HDMI_RESULT_SUCCESS = 0, + HDMI_RESULT_NACK = 1, /* not acknowledged */ + HDMI_RESULT_BUSY = 2, /* bus is busy */ + HDMI_RESULT_FAIL = 3, +}; + +/* + * HDMI port type. + */ +typedef enum hdmi_port_type { + HDMI_INPUT = 0, + HDMI_OUTPUT = 1 +} hdmi_port_type_t; + +/* + * Flags used for set_option() + */ +enum { + /* When set to false, HAL does not wake up the system upon receiving + * <Image View On> or <Text View On>. Used when user changes the TV + * settings to disable the auto TV on functionality. + * True by default. + */ + HDMI_OPTION_WAKEUP = 1, + + /* When set to false, all the CEC commands are discarded. Used when + * user changes the TV settings to disable CEC functionality. + * True by default. + */ + HDMI_OPTION_ENABLE_CEC = 2, + + /* Setting this flag to false means Android system will stop handling + * CEC service and yield the control over to the microprocessor that is + * powered on through the standby mode. When set to true, the system + * will gain the control over, hence telling the microprocessor to stop + * handling the cec commands. This is called when system goes + * in and out of standby mode to notify the microprocessor that it should + * start/stop handling CEC commands on behalf of the system. + * False by default. + */ + HDMI_OPTION_SYSTEM_CEC_CONTROL = 3, + + /* Option 4 not used */ + + /* Passes the updated language information of Android system. + * Contains 3-byte ASCII code as defined in ISO/FDIS 639-2. Can be + * used for HAL to respond to <Get Menu Language> while in standby mode. + * English(eng), for example, is converted to 0x656e67. + */ + HDMI_OPTION_SET_LANG = 5, +}; + +/* + * Maximum length in bytes of cec message body (exclude header block), + * should not exceed 16 (spec CEC 6 Frame Description) + */ +#define CEC_MESSAGE_BODY_MAX_LENGTH 16 + +typedef struct cec_message { + /* logical address of sender */ + cec_logical_address_t initiator; + + /* logical address of receiver */ + cec_logical_address_t destination; + + /* Length in bytes of body, range [0, CEC_MESSAGE_BODY_MAX_LENGTH] */ + size_t length; + unsigned char body[CEC_MESSAGE_BODY_MAX_LENGTH]; +} cec_message_t; + +typedef struct hotplug_event { + /* + * true if the cable is connected; otherwise false. + */ + int connected; + int port_id; +} hotplug_event_t; + +typedef struct tx_status_event { + int status; + int opcode; /* CEC opcode */ +} tx_status_event_t; + +/* + * HDMI event generated from HAL. + */ +typedef struct hdmi_event { + int type; + struct hdmi_cec_device* dev; + union { + cec_message_t cec; + hotplug_event_t hotplug; + }; +} hdmi_event_t; + +/* + * HDMI port descriptor + */ +typedef struct hdmi_port_info { + hdmi_port_type_t type; + // Port ID should start from 1 which corresponds to HDMI "port 1". + int port_id; + int cec_supported; + int arc_supported; + uint16_t physical_address; +} hdmi_port_info_t; + +/* + * Callback function type that will be called by HAL implementation. + * Services can not close/open the device in the callback. + */ +typedef void (*event_callback_t)(const hdmi_event_t* event, void* arg); + +typedef struct hdmi_cec_module { + /** + * Common methods of the HDMI CEC module. This *must* be the first member of + * hdmi_cec_module as users of this structure will cast a hw_module_t to hdmi_cec_module + * pointer in contexts where it's known the hw_module_t references a hdmi_cec_module. + */ + struct hw_module_t common; +} hdmi_module_t; + +/* + * HDMI-CEC HAL interface definition. + */ +typedef struct hdmi_cec_device { + /** + * Common methods of the HDMI CEC device. This *must* be the first member of + * hdmi_cec_device as users of this structure will cast a hw_device_t to hdmi_cec_device + * pointer in contexts where it's known the hw_device_t references a hdmi_cec_device. + */ + struct hw_device_t common; + + /* + * (*add_logical_address)() passes the logical address that will be used + * in this system. + * + * HAL may use it to configure the hardware so that the CEC commands addressed + * the given logical address can be filtered in. This method can be called + * as many times as necessary in order to support multiple logical devices. + * addr should be in the range of valid logical addresses for the call + * to succeed. + * + * Returns 0 on success or -errno on error. + */ + int (*add_logical_address)(const struct hdmi_cec_device* dev, cec_logical_address_t addr); + + /* + * (*clear_logical_address)() tells HAL to reset all the logical addresses. + * + * It is used when the system doesn't need to process CEC command any more, + * hence to tell HAL to stop receiving commands from the CEC bus, and change + * the state back to the beginning. + */ + void (*clear_logical_address)(const struct hdmi_cec_device* dev); + + /* + * (*get_physical_address)() returns the CEC physical address. The + * address is written to addr. + * + * The physical address depends on the topology of the network formed + * by connected HDMI devices. It is therefore likely to change if the cable + * is plugged off and on again. It is advised to call get_physical_address + * to get the updated address when hot plug event takes place. + * + * Returns 0 on success or -errno on error. + */ + int (*get_physical_address)(const struct hdmi_cec_device* dev, uint16_t* addr); + + /* + * (*send_message)() transmits HDMI-CEC message to other HDMI device. + * + * The method should be designed to return in a certain amount of time not + * hanging forever, which can happen if CEC signal line is pulled low for + * some reason. HAL implementation should take the situation into account + * so as not to wait forever for the message to get sent out. + * + * It should try retransmission at least once as specified in the standard. + * + * Returns error code. See HDMI_RESULT_SUCCESS, HDMI_RESULT_NACK, and + * HDMI_RESULT_BUSY. + */ + int (*send_message)(const struct hdmi_cec_device* dev, const cec_message_t*); + + /* + * (*register_event_callback)() registers a callback that HDMI-CEC HAL + * can later use for incoming CEC messages or internal HDMI events. + * When calling from C++, use the argument arg to pass the calling object. + * It will be passed back when the callback is invoked so that the context + * can be retrieved. + */ + void (*register_event_callback)(const struct hdmi_cec_device* dev, + event_callback_t callback, void* arg); + + /* + * (*get_version)() returns the CEC version supported by underlying hardware. + */ + void (*get_version)(const struct hdmi_cec_device* dev, int* version); + + /* + * (*get_vendor_id)() returns the identifier of the vendor. It is + * the 24-bit unique company ID obtained from the IEEE Registration + * Authority Committee (RAC). + */ + void (*get_vendor_id)(const struct hdmi_cec_device* dev, uint32_t* vendor_id); + + /* + * (*get_port_info)() returns the hdmi port information of underlying hardware. + * info is the list of HDMI port information, and 'total' is the number of + * HDMI ports in the system. + */ + void (*get_port_info)(const struct hdmi_cec_device* dev, + struct hdmi_port_info* list[], int* total); + + /* + * (*set_option)() passes flags controlling the way HDMI-CEC service works down + * to HAL implementation. Those flags will be used in case the feature needs + * update in HAL itself, firmware or microcontroller. + */ + void (*set_option)(const struct hdmi_cec_device* dev, int flag, int value); + + /* + * (*set_audio_return_channel)() configures ARC circuit in the hardware logic + * to start or stop the feature. Flag can be either 1 to start the feature + * or 0 to stop it. + * + * Returns 0 on success or -errno on error. + */ + void (*set_audio_return_channel)(const struct hdmi_cec_device* dev, int port_id, int flag); + + /* + * (*is_connected)() returns the connection status of the specified port. + * Returns HDMI_CONNECTED if a device is connected, otherwise HDMI_NOT_CONNECTED. + * The HAL should watch for +5V power signal to determine the status. + */ + int (*is_connected)(const struct hdmi_cec_device* dev, int port_id); + + /* Reserved for future use to maximum 16 functions. Must be NULL. */ + void* reserved[16 - 11]; +} hdmi_cec_device_t; + +/** convenience API for opening and closing a device */ + +static inline int hdmi_cec_open(const struct hw_module_t* module, + struct hdmi_cec_device** device) { + return module->methods->open(module, + HDMI_CEC_HARDWARE_INTERFACE, TO_HW_DEVICE_T_OPEN(device)); +} + +static inline int hdmi_cec_close(struct hdmi_cec_device* device) { + return device->common.close(&device->common); +} + +__END_DECLS + +#endif /* ANDROID_INCLUDE_HARDWARE_HDMI_CEC_H */ |