1 /** @file
2 * @brief Bluetooth Media Control Profile (MCP) Controller role.
3 *
4 * Copyright 2023 NXP
5 * Copyright (c) 2024 Nordic Semiconductor ASA
6 *
7 * SPDX-License-Identifier: Apache-2.0
8 */
9
10 #include <errno.h>
11 #include <stddef.h>
12 #include <stdint.h>
13
14 #include <zephyr/bluetooth/audio/mcc.h>
15 #include <zephyr/bluetooth/audio/media_proxy.h>
16 #include <zephyr/bluetooth/conn.h>
17 #include <zephyr/kernel.h>
18 #include <zephyr/sys/printk.h>
19
20 static struct bt_conn *default_conn;
21
22 static K_SEM_DEFINE(sem_discovery_done, 0, 1);
23
mcc_discover_mcs_cb(struct bt_conn * conn,int err)24 static void mcc_discover_mcs_cb(struct bt_conn *conn, int err)
25 {
26 if (err) {
27 printk("MCP: Discovery of MCS failed (%d)\n", err);
28 } else {
29 printk("MCP: Discovered MCS\n");
30 }
31 k_sem_give(&sem_discovery_done);
32 }
33
mcc_send_command_cb(struct bt_conn * conn,int err,const struct mpl_cmd * cmd)34 static void mcc_send_command_cb(struct bt_conn *conn, int err, const struct mpl_cmd *cmd)
35 {
36 if (err) {
37 printk("MCP: Command send failed (%d) - opcode: %u, param: %d\n",
38 err, cmd->opcode, cmd->param);
39 } else {
40 printk("MCP: Successfully sent command (%d) - opcode: %u, param: %d\n",
41 err, cmd->opcode, cmd->param);
42 }
43 }
44
45 static struct bt_mcc_cb mcc_cb = {
46 .discover_mcs = mcc_discover_mcs_cb,
47 .send_cmd = mcc_send_command_cb,
48 };
49
mcp_ctlr_init(struct bt_conn * conn)50 int mcp_ctlr_init(struct bt_conn *conn)
51 {
52 int err;
53
54 default_conn = bt_conn_ref(conn);
55
56 err = bt_mcc_init(&mcc_cb);
57 if (err != 0) {
58 return err;
59 }
60
61 err = bt_mcc_discover_mcs(default_conn, true);
62 if (err == 0) {
63 k_sem_take(&sem_discovery_done, K_FOREVER);
64 }
65 return err;
66 }
67
mcp_send_cmd(uint8_t mcp_opcode)68 int mcp_send_cmd(uint8_t mcp_opcode)
69 {
70 int err;
71 struct mpl_cmd cmd;
72
73 cmd.opcode = mcp_opcode;
74 cmd.use_param = false;
75
76 if (default_conn == NULL) {
77 printk("MCP: No connection\n");
78 return -EINVAL;
79 }
80
81 err = bt_mcc_send_cmd(default_conn, &cmd);
82 if (err != 0) {
83 printk("MCP: Command failed: %d\n", err);
84 }
85
86 return err;
87 }
88
