Bluetooth: TMAP: Add role validation for bt_tmap_register

Add validation that the device supports the role
set by bt_tmap_register.

Signed-off-by: Emil Gydesen <emil.gydesen@nordicsemi.no>

subsys/bluetooth/audio/Kconfig.tmap

@@ -4,6 +4,25 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 #
+config BT_TMAP_CG_SUPPORTED
+	def_bool (BT_CAP_INITIATOR && BT_CAP_COMMANDER && BT_BAP_UNICAST_CLIENT && BT_AUDIO_RX && \
+		  BT_AUDIO_TX && BT_VCP_VOL_CTLR && BT_TBS)
+
+config BT_TMAP_CT_SUPPORTED
+	def_bool BT_CAP_ACCEPTOR && BT_BAP_UNICAST_SERVER
+
+config BT_TMAP_UMS_SUPPORTED
+	def_bool (BT_CAP_INITIATOR && BT_CAP_COMMANDER && BT_BAP_UNICAST_CLIENT && BT_AUDIO_TX && \
+		  BT_VCP_VOL_CTLR && BT_MCS)
+
+config BT_TMAP_UMR_SUPPORTED
+	def_bool BT_CAP_ACCEPTOR && BT_BAP_UNICAST_SERVER && BT_VCP_VOL_REND
+
+config BT_TMAP_BMS_SUPPORTED
+	def_bool BT_CAP_INITIATOR && BT_BAP_BROADCAST_SOURCE
+
+config BT_TMAP_BMR_SUPPORTED
+	def_bool BT_CAP_ACCEPTOR && BT_BAP_BROADCAST_SINK && BT_VCP_VOL_REND
 
 config BT_TMAP
 	bool "Telephony and Media Audio Profile"

subsys/bluetooth/audio/tmap.c

@@ -1,5 +1,6 @@
 /*
  * Copyright 2023 NXP
+ * Copyright (c) 2024 Nordic Semiconductor ASA
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -22,6 +23,8 @@
 #include <zephyr/kernel.h>
 #include <zephyr/logging/log.h>
 #include <zephyr/sys/byteorder.h>
+#include <zephyr/sys/check.h>
+#include <zephyr/sys/util_macro.h>
 #include <zephyr/types.h>
 
 #include "audio_internal.h"
@@ -29,7 +32,9 @@
 LOG_MODULE_REGISTER(bt_tmap, CONFIG_BT_TMAP_LOG_LEVEL);
 
 /* Hex value if all TMAP role bits are set */
-#define TMAP_ALL_ROLES		0x3F
+#define TMAP_ALL_ROLES                                                                             \
+	(BT_TMAP_ROLE_CG | BT_TMAP_ROLE_CT | BT_TMAP_ROLE_UMS | BT_TMAP_ROLE_UMR |                 \
+	 BT_TMAP_ROLE_BMS | BT_TMAP_ROLE_BMR)
 
 static uint16_t tmap_role;
 static const struct bt_tmap_cb *cb;
@@ -155,10 +160,61 @@ static ssize_t read_role(struct bt_conn *conn,
 static struct bt_gatt_attr svc_attrs[] = { BT_TMAS_SERVICE_DEFINITION };
 static struct bt_gatt_service tmas;
 
+static bool valid_tmap_role(enum bt_tmap_role role)
+{
+	if (role == 0 || (role & TMAP_ALL_ROLES) != role) {
+		LOG_DBG("Invalid role %d", role);
+	}
+
+	if ((role & BT_TMAP_ROLE_CG) != 0 && !IS_ENABLED(CONFIG_BT_TMAP_CG_SUPPORTED)) {
+		LOG_DBG("Device does not support the CG role");
+
+		return false;
+	}
+
+	if ((role & BT_TMAP_ROLE_CT) != 0 && !IS_ENABLED(CONFIG_BT_TMAP_CT_SUPPORTED)) {
+		LOG_DBG("Device does not support the CT role");
+
+		return false;
+	}
+
+	if ((role & BT_TMAP_ROLE_UMS) != 0 && !IS_ENABLED(CONFIG_BT_TMAP_UMS_SUPPORTED)) {
+		LOG_DBG("Device does not support the UMS role");
+
+		return false;
+	}
+
+	if ((role & BT_TMAP_ROLE_UMR) != 0 && !IS_ENABLED(CONFIG_BT_TMAP_UMR_SUPPORTED)) {
+		LOG_DBG("Device does not support the UMR role");
+
+		return false;
+	}
+
+	if ((role & BT_TMAP_ROLE_BMS) != 0 && !IS_ENABLED(CONFIG_BT_TMAP_BMS_SUPPORTED)) {
+		LOG_DBG("Device does not support the BMS role");
+
+		return false;
+	}
+
+	if ((role & BT_TMAP_ROLE_BMR) != 0 && !IS_ENABLED(CONFIG_BT_TMAP_BMR_SUPPORTED)) {
+		LOG_DBG("Device does not support the BMR role");
+
+		return false;
+	}
+
+	return true;
+}
+
 int bt_tmap_register(enum bt_tmap_role role)
 {
 	int err;
 
+	CHECKIF(!valid_tmap_role(role)) {
+		LOG_DBG("Invalid role: %d", role);
+
+		return -EINVAL;
+	}
+
 	tmas = (struct bt_gatt_service)BT_GATT_SERVICE(svc_attrs);
 
 	err = bt_gatt_service_register(&tmas);