1 /** @file 2 * @brief Audio Video Remote Control Profile internal header. 3 */ 4 5 /* 6 * Copyright (c) 2015-2016 Intel Corporation 7 * Copyright (C) 2024 Xiaomi Corporation 8 * 9 * SPDX-License-Identifier: Apache-2.0 10 */ 11 12 #define AVCTP_VER_1_4 (0x0104u) 13 #define AVRCP_VER_1_6 (0x0106u) 14 15 #define AVRCP_CAT_1 BIT(0) /* Player/Recorder */ 16 #define AVRCP_CAT_2 BIT(1) /* Monitor/Amplifier */ 17 #define AVRCP_CAT_3 BIT(2) /* Tuner */ 18 #define AVRCP_CAT_4 BIT(3) /* Menu */ 19 20 #define AVRCP_SUBUNIT_PAGE (0) /* Fixed value according to AVRCP */ 21 #define AVRCP_SUBUNIT_EXTENSION_COED (7) /* Fixed value according to TA Document 2001012 */ 22 23 typedef enum __packed { 24 BT_AVRCP_SUBUNIT_ID_ZERO = 0x0, 25 BT_AVRCP_SUBUNIT_ID_IGNORE = 0x7, 26 } bt_avrcp_subunit_id_t; 27 28 typedef enum __packed { 29 BT_AVRCP_SUBUNIT_TYPE_PANEL = 0x9, 30 BT_AVRCP_SUBUNIT_TYPE_UNIT = 0x1F, 31 } bt_avrcp_subunit_type_t; 32 33 typedef enum __packed { 34 BT_AVRCP_OPC_VENDOR_DEPENDENT = 0x0, 35 BT_AVRCP_OPC_UNIT_INFO = 0x30, 36 BT_AVRCP_OPC_SUBUNIT_INFO = 0x31, 37 BT_AVRCP_OPC_PASS_THROUGH = 0x7c, 38 } bt_avrcp_opcode_t; 39 40 struct bt_avrcp_req { 41 uint8_t tid; 42 uint8_t subunit; 43 uint8_t opcode; 44 }; 45 46 struct bt_avrcp_header { 47 uint8_t byte0; /** [7:4]: RFA, [3:0]: Ctype */ 48 uint8_t byte1; /** [7:3]: Subunit_type, [2:0]: Subunit_ID */ 49 uint8_t opcode; /** Unit Info, Subunit Info, Vendor Dependent, or Pass Through */ 50 } __packed; 51 52 /** The 4-bit command type or the 4-bit response code. */ 53 #define BT_AVRCP_HDR_GET_CTYPE_OR_RSP(hdr) FIELD_GET(GENMASK(3, 0), ((hdr)->byte0)) 54 /** Taken together, the subunit_type and subunit_ID fields define the command recipient’s address 55 * within the target. These fields enable the target to determine whether the command is 56 * addressed to the target unit, or to a specific subunit within the target. The values in these 57 * fields remain unchanged in the response frame. 58 */ 59 #define BT_AVRCP_HDR_GET_SUBUNIT_ID(hdr) FIELD_GET(GENMASK(2, 0), ((hdr)->byte1)) 60 /** Taken together, the subunit_type and subunit_ID fields define the command recipient’s address 61 * within the target. These fields enable the target to determine whether the command is 62 * addressed to the target unit, or to a specific subunit within the target. The values in these 63 * fields remain unchanged in the response frame. 64 */ 65 #define BT_AVRCP_HDR_GET_SUBUNIT_TYPE(hdr) FIELD_GET(GENMASK(7, 3), ((hdr)->byte1)) 66 67 /** The 4-bit command type or the 4-bit response code. */ 68 #define BT_AVRCP_HDR_SET_CTYPE_OR_RSP(hdr, ctype) \ 69 (hdr)->byte0 = (((hdr)->byte0) & ~GENMASK(3, 0)) | FIELD_PREP(GENMASK(3, 0), (ctype)) 70 /** Taken together, the subunit_type and subunit_ID fields define the command recipient’s address 71 * within the target. These fields enable the target to determine whether the command is 72 * addressed to the target unit, or to a specific subunit within the target. The values in these 73 * fields remain unchanged in the response frame. 74 */ 75 #define BT_AVRCP_HDR_SET_SUBUNIT_ID(hdr, subunit_id) \ 76 (hdr)->byte1 = (((hdr)->byte1) & ~GENMASK(2, 0)) | FIELD_PREP(GENMASK(2, 0), (subunit_id)) 77 /** Taken together, the subunit_type and subunit_ID fields define the command recipient’s address 78 * within the target. These fields enable the target to determine whether the command is 79 * addressed to the target unit, or to a specific subunit within the target. The values in these 80 * fields remain unchanged in the response frame. 81 */ 82 #define BT_AVRCP_HDR_SET_SUBUNIT_TYPE(hdr, subunit_type) \ 83 (hdr)->byte1 = (((hdr)->byte1) & ~GENMASK(7, 3)) | FIELD_PREP(GENMASK(7, 3), (subunit_type)) 84 85 struct bt_avrcp_frame { 86 struct bt_avrcp_header hdr; 87 uint8_t data[0]; 88 } __packed; 89 90 int bt_avrcp_init(void); 91
