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