- Implementation of functions related profile and service for MICS and MICP
- Specifications referred for implementation:
MICS - MICS_v1.0.pdf
MICP - MICP_v1.0.pdf
Co-developed-by: Mahesh Talewad <mahesh.talewad@xxxxxxx>
Signed-off-by: Mahesh Talewad <mahesh.talewad@xxxxxxx>
Signed-off-by: Nitin Jadhav <nitin.jadhav@xxxxxxx>
---
Makefile.am | 1 +
src/shared/micp.c | 887 ++++++++++++++++++++++++++++++++++++++++++++++
src/shared/micp.h | 83 +++++
3 files changed, 971 insertions(+)
create mode 100644 src/shared/micp.c
create mode 100644 src/shared/micp.h
diff --git a/Makefile.am b/Makefile.am
index 4b9b7e5cd..6f40f2a74 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -233,6 +233,7 @@ shared_sources = src/shared/io.h src/shared/timeout.h \
src/shared/bap.h src/shared/bap.c src/shared/ascs.h \
src/shared/mcs.h src/shared/mcp.h src/shared/mcp.c \
src/shared/vcp.c src/shared/vcp.h \
+ src/shared/micp.c src/shared/micp.h \
src/shared/csip.c src/shared/csip.h \
src/shared/bass.h src/shared/bass.c \
src/shared/lc3.h src/shared/tty.h
diff --git a/src/shared/micp.c b/src/shared/micp.c
new file mode 100644
index 000000000..90d05b301
--- /dev/null
+++ b/src/shared/micp.c
@@ -0,0 +1,887 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+/*
+ *
+ * BlueZ - Bluetooth protocol stack for Linux
+ *
+ * Copyright (C) 2023 NXP Semiconductors. All rights reserved.
+ *
+ */
+#define _GNU_SOURCE
+#include <inttypes.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include "lib/bluetooth.h"
+#include "lib/uuid.h"
+
+#include "src/shared/queue.h"
+#include "src/shared/util.h"
+#include "src/shared/timeout.h"
+#include "src/shared/att.h"
+#include "src/shared/gatt-db.h"
+#include "src/shared/gatt-server.h"
+#include "src/shared/gatt-helpers.h"
+#include "src/shared/micp.h"
+
+#define DBG(_micp, fmt, arg...) \
+ micp_debug(_micp, "%s:%s() " fmt, __FILE__, __func__, ##arg)
+
+/* Application error codes */
+#define MICP_ERROR_MUTE_DISABLED 0x80
+#define MICP_ERROR_VALUE_NOT_ALLOWED 0x13
+#define BT_ATT_ERROR_OPCODE_NOT_SUPPORTED 0x81
+
+/* Mute char values */
+#define MICS_NOT_MUTED 0x00
+#define MICS_MUTED 0x01
+#define MICS_DISABLED 0x02
+
+static struct queue *micp_db;
+static struct queue *micp_cbs;
+static struct queue *sessions;
+
+struct bt_micp_cb {
+ unsigned int id;
+ bt_micp_func_t attached;
+ bt_micp_func_t detached;
+ void *user_data;
+};
+
+typedef void (*micp_func_t)(struct bt_micp *micp, bool success,
+ uint8_t att_ecode, const uint8_t *value,
+ uint16_t length, void *user_data);
+
+struct bt_micp_pending {
+ unsigned int id;
+ struct bt_micp *micp;
+ micp_func_t func;
+ void *userdata;
+};
+
+struct bt_micp_ready {
+ unsigned int id;
+ bt_micp_ready_func_t func;
+ bt_micp_destroy_func_t destroy;
+ void *data;
+};
+
+typedef void (*micp_notify_t)(struct bt_micp *micp, uint16_t value_handle,
+ const uint8_t *value, uint16_t length,
+ void *user_data);
+
+struct bt_micp_notify {
+ unsigned int id;
+ struct bt_micp *micp;
+ micp_notify_t func;
+ void *user_data;
+};
+
+static void *iov_pull_mem(struct iovec *iov, size_t len)
+{
+ void *data = iov->iov_base;
+
+ if (iov->iov_len < len)
+ return NULL;
+
+ iov->iov_base += len;
+ iov->iov_len -= len;
+
+ return data;
+}
+
+static struct bt_micp_db *micp_get_mdb(struct bt_micp *micp)
+{
+ if (!micp)
+ return NULL;
+
+ if (micp->ldb)
+ return micp->ldb;
+
+ return NULL;
+}
+
+static uint8_t *mdb_get_mute_state(struct bt_micp_db *vdb)
+{
+ if (!vdb->mics)
+ return NULL;
+
+ return &(vdb->mics->mute_stat);
+}
+
+struct bt_mics *micp_get_mics(struct bt_micp *micp)
+{
+ if (!micp)
+ return NULL;
+
+ if (micp->rdb->mics)
+ return micp->rdb->mics;
+
+ micp->rdb->mics = new0(struct bt_mics, 1);
+ micp->rdb->mics->mdb = micp->rdb;
+
+ return micp->rdb->mics;
+}
+
+static void micp_detached(void *data, void *user_data)
+{
+ struct bt_micp_cb *cb = data;
+ struct bt_micp *micp = user_data;
+
+ cb->detached(micp, cb->user_data);
+}
+
+void bt_micp_detach(struct bt_micp *micp)
+{
+ if (!queue_remove(sessions, micp))
+ return;
+
+ bt_gatt_client_unref(micp->client);
+ micp->client = NULL;
+
+ queue_foreach(micp_cbs, micp_detached, micp);
+}
+
+static void micp_db_free(void *data)
+{
+ struct bt_micp_db *mdb = data;
+
+ if (!mdb)
+ return;
+
+ gatt_db_unref(mdb->db);
+
+ free(mdb->mics);
+ free(mdb);
+}
+
+static void micp_ready_free(void *data)
+{
+ struct bt_micp_ready *ready = data;
+
+ if (ready->destroy)
+ ready->destroy(ready->data);
+
+ free(ready);
+}
+
+static void micp_free(void *data)
+{
+ struct bt_micp *micp = data;
+
+ bt_micp_detach(micp);
+
+ micp_db_free(micp->rdb);
+
+ queue_destroy(micp->pending, NULL);
+ queue_destroy(micp->ready_cbs, micp_ready_free);
+
+ free(micp);
+}
+
+bool bt_micp_set_user_data(struct bt_micp *micp, void *user_data)
+{
+
+ if (!micp)
+ return false;
+
+ micp->user_data = user_data;
+
+ return true;
+}
+
+static bool micp_db_match(const void *data, const void *match_data)
+{
+ const struct bt_micp_db *mdb = data;
+ const struct gatt_db *db = match_data;
+
+ return (mdb->db == db);
+}
+
+struct bt_att *bt_micp_get_att(struct bt_micp *micp)
+{
+ if (!micp)
+ return NULL;
+
+ if (micp->att)
+ return micp->att;
+
+ return bt_gatt_client_get_att(micp->client);
+}
+
+struct bt_micp *bt_micp_ref(struct bt_micp *micp)
+{
+ if (!micp)
+ return NULL;
+
+ __sync_fetch_and_add(&micp->ref_count, 1);
+
+ return micp;
+}
+
+void bt_micp_unref(struct bt_micp *micp)
+{
+ if (!micp)
+ return;
+
+ if (__sync_sub_and_fetch(&micp->ref_count, 1))
+ return;
+
+ micp_free(micp);
+}
+
+static void micp_debug(struct bt_micp *micp, const char *format, ...)
+{
+ va_list ap;
+
+ if (!micp || !format || !micp->debug_func)
+ return;
+
+ va_start(ap, format);
+ util_debug_va(micp->debug_func, micp->debug_data, format, ap);
+ va_end(ap);
+}
+
+static void micp_disconnected(int err, void *user_data)
+{
+ struct bt_micp *micp = user_data;
+
+ DBG(micp, "micp %p disconnected err %d", micp, err);
+
+ bt_micp_detach(micp);
+}
+
+static struct bt_micp *micp_get_session(struct bt_att *att, struct gatt_db *db)
+{
+ const struct queue_entry *entry;
+ struct bt_micp *micp;
+
+ for (entry = queue_get_entries(sessions); entry; entry = entry->next) {
+ struct bt_micp *micp = entry->data;
+
+ if (att == bt_micp_get_att(micp))
+ return micp;
+ }
+
+ micp = bt_micp_new(db, NULL);
+ micp->att = att;
+
+ bt_att_register_disconnect(att, micp_disconnected, micp, NULL);
+
+ bt_micp_attach(micp, NULL);
+
+ return micp;
+}
+
+static void mics_mute_read(struct gatt_db_attribute *attrib,
+ unsigned int id, uint16_t offset,
+ uint8_t opcode, struct bt_att *att,
+ void *user_data)
+{
+ struct bt_mics *mics = user_data;
+ struct iovec iov;
+
+ iov.iov_base = &mics->mute_stat;
+ iov.iov_len = sizeof(mics->mute_stat);
+
+ gatt_db_attribute_read_result(attrib, id, 0, iov.iov_base,
+ iov.iov_len);
+}
+
+static uint8_t mics_not_muted(struct bt_mics *mics, struct bt_micp *micp,
+ struct iovec *iov)
+{
+ struct bt_micp_db *mdb;
+ uint8_t *mute_state;
+
+ DBG(micp, "Mute state OP: Not Muted");
+
+ mdb = micp_get_mdb(micp);
+ if (!mdb) {
+ DBG(micp, "error: MDB not available");
+ return 0;
+ }
+
+ mute_state = mdb_get_mute_state(mdb);
+ if (!mute_state) {
+ DBG(micp, "Error : Mute State not available");
+ return 0;
+ }
+
+ *mute_state = MICS_NOT_MUTED;
+
+ gatt_db_attribute_notify(mdb->mics->ms, (void *)mute_state,
+ sizeof(uint8_t), bt_micp_get_att(micp));
+
+ return 0;
+}
+
+static uint8_t mics_muted(struct bt_mics *mics, struct bt_micp *micp,
+ struct iovec *iov)
+{
+ struct bt_micp_db *mdb;
+ uint8_t *mute_state;
+
+ DBG(micp, "Mute state OP: Muted");
+
+ mdb = micp_get_mdb(micp);
+ if (!mdb) {
+ DBG(micp, "error: MDB not available");
+ return 0;
+ }
+
+ mute_state = mdb_get_mute_state(mdb);
+
+ *mute_state = MICS_MUTED;
+
+ gatt_db_attribute_notify(mdb->mics->ms, (void *)mute_state,
+ sizeof(uint8_t), bt_micp_get_att(micp));
+
+ return 0;
+}
+
+#define MICS_OP(_str, _op, _size, _func) \
+ { \
+ .str = _str, \
+ .op = _op, \
+ .size = _size, \
+ .func = _func, \
+ }
+
+struct mics_op_handler {
+ const char *str;
+ uint8_t op;
+ size_t size;
+ uint8_t (*func)(struct bt_mics *mics, struct bt_micp *micp,
+ struct iovec *iov);
+} micp_handlers[] = {
+ MICS_OP("Not Muted", MICS_NOT_MUTED,
+ sizeof(uint8_t), mics_not_muted),
+ MICS_OP("Muted", MICS_MUTED,
+ sizeof(uint8_t), mics_muted),
+ {}};
+
+static void mics_mute_write(struct gatt_db_attribute *attrib,
+ unsigned int id, uint16_t offset,
+ const uint8_t *value, size_t len,
+ uint8_t opcode, struct bt_att *att,
+ void *user_data)
+{
+ struct bt_mics *mics = user_data;
+ struct bt_micp *micp = micp_get_session(att, mics->mdb->db);
+ struct iovec iov = {
+ .iov_base = (void *)value,
+ .iov_len = len,
+ };
+ uint8_t *micp_op, *mute_state;
+ struct mics_op_handler *handler;
+ uint8_t ret = BT_ATT_ERROR_REQUEST_NOT_SUPPORTED;
+ struct bt_micp_db *mdb;
+
+ DBG(micp, "MICS Mute Char write: len: %ld: %ld", len, iov.iov_len);
+
+ if (offset) {
+ DBG(micp, "invalid offset: %d", offset);
+ ret = BT_ATT_ERROR_INVALID_OFFSET;
+ goto respond;
+ }
+
+ if (len < sizeof(*micp_op)) {
+ DBG(micp, "invalid length: %ld < %ld sizeof(param)", len,
+ sizeof(*micp_op));
+ ret = BT_ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LEN;
+ goto respond;
+ }
+
+ micp_op = iov_pull_mem(&iov, sizeof(*micp_op));
+
+ if ((*micp_op == MICS_DISABLED) || (*micp_op != MICS_NOT_MUTED
+ && *micp_op != MICS_MUTED)) {
+ DBG(micp, "Invalid operation - MICS DISABLED/RFU mics op:%d",
+ micp_op);
+ ret = MICP_ERROR_VALUE_NOT_ALLOWED;
+ goto respond;
+ }
+
+ mdb = micp_get_mdb(micp);
+ if (!mdb) {
+ DBG(micp, "error: MDB not available");
+ goto respond;
+ }
+
+ mute_state = mdb_get_mute_state(mdb);
+ if (*mute_state == MICS_DISABLED) {
+ DBG(micp, "state: MICS DISABLED , can not write value: %d",
+ *micp_op);
+ ret = MICP_ERROR_MUTE_DISABLED;
+ goto respond;
+ }
+
+ for (handler = micp_handlers; handler && handler->str; handler++) {
+ DBG(micp, "handler->op: %d micp_op: %d iov.iov_len: %ld",
+ handler->op, *micp_op, iov.iov_len);
+ if (handler->op != *micp_op)
+ continue;
+
+ if (len < handler->size) {
+ DBG(micp, "invalid len %ld : %ld < %ld handler->size",
+ len, iov.iov_len, handler->size);
+ ret = BT_ATT_ERROR_OPCODE_NOT_SUPPORTED;
+ goto respond;
+ }
+
+ break;
+ }
+
+ if (handler && handler->str) {
+ DBG(micp, "%s", handler->str);
+
+ ret = handler->func(mics, micp, &iov);
+ } else {
+ DBG(micp, "unknown opcode 0x%02x", *micp_op);
+ ret = BT_ATT_ERROR_OPCODE_NOT_SUPPORTED;
+ }
+
+respond:
+ gatt_db_attribute_write_result(attrib, id, ret);
+}
+
+static struct bt_mics *mics_new(struct gatt_db *db)
+{
+ struct bt_mics *mics;
+ bt_uuid_t uuid;
+
+ if (!db)
+ return NULL;
+
+ mics = new0(struct bt_mics, 1);
+
+ mics->mute_stat = MICS_MUTED;
+
+ /* Populate DB with MICS attributes */
+ bt_uuid16_create(&uuid, MICS_UUID);
+ mics->service = gatt_db_add_service(db, &uuid, true, 4);
+
+ bt_uuid16_create(&uuid, MUTE_CHRC_UUID);
+ mics->ms = gatt_db_service_add_characteristic(mics->service,
+ &uuid,
+ BT_ATT_PERM_READ | BT_ATT_PERM_WRITE,
+ BT_GATT_CHRC_PROP_READ | BT_GATT_CHRC_PROP_WRITE
+ | BT_GATT_CHRC_PROP_NOTIFY,
+ mics_mute_read, mics_mute_write,
+ mics);
+
+ mics->ms_ccc = gatt_db_service_add_ccc(mics->service,
+ BT_ATT_PERM_READ | BT_ATT_PERM_WRITE);
+
+ gatt_db_service_set_active(mics->service, true);
+
+ return mics;
+}
+
+static struct bt_micp_db *micp_db_new(struct gatt_db *db)
+{
+ struct bt_micp_db *mdb;
+
+ if (!db)
+ return NULL;
+
+ mdb = new0(struct bt_micp_db, 1);
+ mdb->db = gatt_db_ref(db);
+
+ if (!micp_db)
+ micp_db = queue_new();
+
+ mdb->mics = mics_new(db);
+ mdb->mics->mdb = mdb;
+
+ queue_push_tail(micp_db, mdb);
+
+ return mdb;
+}
+
+static struct bt_micp_db *micp_get_db(struct gatt_db *db)
+{
+ struct bt_micp_db *mdb;
+
+ mdb = queue_find(micp_db, micp_db_match, db);
+ if (mdb)
+ return mdb;
+
+ return micp_db_new(db);
+}
+
+void bt_micp_add_db(struct gatt_db *db)
+{
+ micp_db_new(db);
+}
+
+bool bt_micp_set_debug(struct bt_micp *micp, bt_micp_debug_func_t func,
+ void *user_data, bt_micp_destroy_func_t destroy)
+{
+ if (!micp)
+ return false;
+
+ if (micp->debug_destroy)
+ micp->debug_destroy(micp->debug_data);
+
+ micp->debug_func = func;
+ micp->debug_destroy = destroy;
+ micp->debug_data = user_data;
+
+ return true;
+}
+
+unsigned int bt_micp_register(bt_micp_func_t attached, bt_micp_func_t detached,
+ void *user_data)
+{
+ struct bt_micp_cb *cb;
+ static unsigned int id;
+
+ if (!attached && !detached)
+ return 0;
+
+ if (!micp_cbs)
+ micp_cbs = queue_new();
+
+ cb = new0(struct bt_micp_cb, 1);
+ cb->id = ++id ? id : ++id;
+ cb->attached = attached;
+ cb->detached = detached;
+ cb->user_data = user_data;
+
+ queue_push_tail(micp_cbs, cb);
+
+ return cb->id;
+}
+
+static bool match_id(const void *data, const void *match_data)
+{
+ const struct bt_micp_cb *cb = data;
+ unsigned int id = PTR_TO_UINT(match_data);
+
+ return (cb->id == id);
+}
+
+bool bt_micp_unregister(unsigned int id)
+{
+ struct bt_micp_cb *cb;
+
+ cb = queue_remove_if(micp_cbs, match_id, UINT_TO_PTR(id));
+ if (!cb)
+ return false;
+
+ free(cb);
+
+ return true;
+}
+
+struct bt_micp *bt_micp_new(struct gatt_db *ldb, struct gatt_db *rdb)
+{
+ struct bt_micp *micp;
+ struct bt_micp_db *mdb;
+
+ if (!ldb)
+ return NULL;
+
+ mdb = micp_get_db(ldb);
+ if (!mdb)
+ return NULL;
+
+ micp = new0(struct bt_micp, 1);
+ micp->ldb = mdb;
+ micp->pending = queue_new();
+ micp->ready_cbs = queue_new();
+
+ if (!rdb)
+ goto done;
+
+ mdb = new0(struct bt_micp_db, 1);
+ mdb->db = gatt_db_ref(rdb);
+
+ micp->rdb = mdb;
+
+done:
+ bt_micp_ref(micp);
+
+ return micp;
+}
+
+static void micp_pending_destroy(void *data)
+{
+ struct bt_micp_pending *pending = data;
+ struct bt_micp *micp = pending->micp;
+
+ if (queue_remove_if(micp->pending, NULL, pending))
+ free(pending);
+}
+
+static void micp_pending_complete(bool success, uint8_t att_ecode,
+ const uint8_t *value, uint16_t length,
+ void *user_data)
+{
+ struct bt_micp_pending *pending = user_data;
+
+ if (pending->func)
+ pending->func(pending->micp, success, att_ecode, value, length,
+ pending->userdata);
+}
+
+static void micp_read_value(struct bt_micp *micp, uint16_t value_handle,
+ micp_func_t func, void *user_data)
+{
+ struct bt_micp_pending *pending;
+
+ pending = new0(struct bt_micp_pending, 1);
+ pending->micp = micp;
+ pending->func = func;
+ pending->userdata = user_data;
+
+ pending->id = bt_gatt_client_read_value(micp->client, value_handle,
+ micp_pending_complete, pending,
+ micp_pending_destroy);
+
+ if (!pending->id) {
+ DBG(micp, "unable to send read request");
+ free(pending);
+ return;
+ }
+
+ queue_push_tail(micp->pending, pending);
+}
+
+static void micp_register(uint16_t att_ecode, void *user_data)
+{
+ struct bt_micp_notify *notify = user_data;
+
+ if (att_ecode)
+ DBG(notify->micp, "MICP register failed 0x%04x", att_ecode);
+}
+
+static void micp_notify(uint16_t value_handle, const uint8_t *value,
+ uint16_t length, void *user_data)
+{
+ struct bt_micp_notify *notify = user_data;
+
+ if (notify->func)
+ notify->func(notify->micp, value_handle, value, length,
+ notify->user_data);
+}
+
+static void micp_notify_destroy(void *data)
+{
+ struct bt_micp_notify *notify = data;
+ struct bt_micp *micp = notify->micp;
+
+ if (queue_remove_if(micp->notify, NULL, notify))
+ free(notify);
+}
+
+static unsigned int micp_register_notify(struct bt_micp *micp,
+ uint16_t value_handle,
+ micp_notify_t func,
+ void *user_data)
+{
+ struct bt_micp_notify *notify;
+
+ notify = new0(struct bt_micp_notify, 1);
+ notify->micp = micp;
+ notify->func = func;
+ notify->user_data = user_data;
+
+ notify->id = bt_gatt_client_register_notify(micp->client,
+ value_handle, micp_register,
+ micp_notify, notify,
+ micp_notify_destroy);
+ if (!notify->id) {
+ DBG(micp, "Unable to register for notifications");
+ free(notify);
+ return 0;
+ }
+
+ queue_push_tail(micp->notify, notify);
+
+ return notify->id;
+}
+
+static void micp_mute_state_notify(struct bt_micp *micp, uint16_t value_handle,
+ const uint8_t *value, uint16_t length,
+ void *user_data)
+{
+ uint8_t mute_state;
+
+ memcpy(&mute_state, value, sizeof(mute_state));
+
+ DBG(micp, "Mute state: 0x%x", mute_state);
+}
+
+static void read_mute_state(struct bt_micp *micp, bool success,
+ uint8_t att_ecode, const uint8_t *value,
+ uint16_t length, void *user_data)
+{
+ uint8_t *mute_state;
+ struct iovec iov = {
+ .iov_base = (void *)value,
+ .iov_len = length,
+ };
+
+ if (!success) {
+ DBG(micp, "Unable to read Mute state: error 0x%02x", att_ecode);
+ return;
+ }
+
+ mute_state = iov_pull_mem(&iov, sizeof(uint8_t));
+ if (mute_state == NULL) {
+ DBG(micp, "Unable to get Mute state");
+ return;
+ }
+
+ DBG(micp, "Mute state: %x", *mute_state);
+}
+
+static void foreach_mics_char(struct gatt_db_attribute *attr, void *user_data)
+{
+ struct bt_micp *micp = user_data;
+ uint16_t value_handle;
+ bt_uuid_t uuid, uuid_mute;
+ struct bt_mics *mics;
+
+ if (!gatt_db_attribute_get_char_data(attr, NULL, &value_handle,
+ NULL, NULL, &uuid))
+ return;
+
+ bt_uuid16_create(&uuid_mute, MUTE_CHRC_UUID);
+ if (!bt_uuid_cmp(&uuid, &uuid_mute)) {
+ DBG(micp, "MICS Mute characteristic found: handle 0x%04x",
+ value_handle);
+
+ mics = micp_get_mics(micp);
+ if (!mics || mics->ms)
+ return;
+
+ mics->ms = attr;
+
+ micp_read_value(micp, value_handle, read_mute_state, micp);
+
+ micp->mute_id = micp_register_notify(micp, value_handle,
+ micp_mute_state_notify, NULL);
+ }
+}
+
+static void foreach_mics_service(struct gatt_db_attribute *attr,
+ void *user_data)
+{
+ struct bt_micp *micp = user_data;
+ struct bt_mics *mics = micp_get_mics(micp);
+
+ mics->service = attr;
+
+ gatt_db_service_set_claimed(attr, true);
+ gatt_db_service_foreach_char(attr, foreach_mics_char, micp);
+}
+
+unsigned int bt_micp_ready_register(struct bt_micp *micp,
+ bt_micp_ready_func_t func, void *user_data,
+ bt_micp_destroy_func_t destroy)
+{
+ struct bt_micp_ready *ready;
+ static unsigned int id;
+
+ DBG(micp, "bt_micp_ready_register_Entry\n");
+ if (!micp)
+ return 0;
+
+ ready = new0(struct bt_micp_ready, 1);
+ ready->id = ++id ? id : ++id;
+ ready->func = func;
+ ready->destroy = destroy;
+ ready->data = user_data;
+
+ queue_push_tail(micp->ready_cbs, ready);
+
+ return ready->id;
+}
+
+static bool match_ready_id(const void *data, const void *match_data)
+{
+ const struct bt_micp_ready *ready = data;
+ unsigned int id = PTR_TO_UINT(match_data);
+
+ return (ready->id == id);
+}
+
+bool bt_micp_ready_unregister(struct bt_micp *micp, unsigned int id)
+{
+ struct bt_micp_ready *ready;
+
+ ready = queue_remove_if(micp->ready_cbs, match_ready_id,
+ UINT_TO_PTR(id));
+ if (!ready)
+ return false;
+
+ micp_ready_free(ready);
+
+ return true;
+}
+
+static struct bt_micp *bt_micp_ref_safe(struct bt_micp *micp)
+{
+ if (!micp || !micp->ref_count)
+ return NULL;
+
+ return bt_micp_ref(micp);
+}
+
+static void micp_notify_ready(struct bt_micp *micp)
+{
+ const struct queue_entry *entry;
+
+ if (!bt_micp_ref_safe(micp))
+ return;
+
+ for (entry = queue_get_entries(micp->ready_cbs); entry;
+ entry = entry->next) {
+ struct bt_micp_ready *ready = entry->data;
+
+ ready->func(micp, ready->data);
+ }
+
+ bt_micp_unref(micp);
+}
+
+static void micp_idle(void *data)
+{
+ struct bt_micp *micp = data;
+
+ micp->idle_id = 0;
+ micp_notify_ready(micp);
+}
+
+bool bt_micp_attach(struct bt_micp *micp, struct bt_gatt_client *client)
+{
+ bt_uuid_t uuid;
+
+ if (!sessions)
+ sessions = queue_new();
+
+ queue_push_tail(sessions, micp);
+
+ if (!client)
+ return true;
+
+ if (micp->client)
+ return false;
+
+ micp->client = bt_gatt_client_clone(client);
+ if (!micp->client)
+ return false;
+
+ bt_gatt_client_idle_register(micp->client, micp_idle, micp, NULL);
+
+ bt_uuid16_create(&uuid, MICS_UUID);
+ gatt_db_foreach_service(micp->ldb->db, &uuid, foreach_mics_service,
+ micp);
+ return true;
+}
diff --git a/src/shared/micp.h b/src/shared/micp.h
new file mode 100644
index 000000000..c881aded9
--- /dev/null
+++ b/src/shared/micp.h
@@ -0,0 +1,83 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ *
+ * BlueZ - Bluetooth protocol stack for Linux
+ *
+ * Copyright (C) 2023 NXP Semiconductors. All rights reserved.
+ *
+ */
+#include <stdbool.h>
+#include <inttypes.h>
+
+#include "src/shared/io.h"
+#include "src/shared/gatt-client.h"
+
+struct bt_mics;
+struct bt_micp;
+
+typedef void (*bt_micp_ready_func_t)(struct bt_micp *micp, void *user_data);
+typedef void (*bt_micp_destroy_func_t)(void *user_data);
+typedef void (*bt_micp_debug_func_t)(const char *str, void *user_data);
+typedef void (*bt_micp_func_t)(struct bt_micp *micp, void *user_data);
+
+struct bt_micp_db {
+ struct gatt_db *db;
+ struct bt_mics *mics;
+};
+
+struct bt_mics {
+ struct bt_micp_db *mdb;
+ uint8_t mute_stat;
+ struct gatt_db_attribute *service;
+ struct gatt_db_attribute *ms;
+ struct gatt_db_attribute *ms_ccc;
+};
+
+struct bt_micp {
+ int ref_count;
+ struct bt_micp_db *ldb;
+ struct bt_micp_db *rdb;
+ struct bt_gatt_client *client;
+ struct bt_att *att;
+ unsigned int mute_id;
+
+ unsigned int idle_id;
+ uint8_t mute;
+
+ struct queue *notify;
+ struct queue *pending;
+ struct queue *ready_cbs;
+
+ bt_micp_debug_func_t debug_func;
+ bt_micp_destroy_func_t debug_destroy;
+
+ void *debug_data;
+ void *user_data;
+};
+
+struct bt_micp *bt_micp_ref(struct bt_micp *micp);
+void bt_micp_unref(struct bt_micp *micp);
+
+void bt_micp_add_db(struct gatt_db *db);
+
+bool bt_micp_attach(struct bt_micp *micp, struct bt_gatt_client *client);
+void bt_micp_detach(struct bt_micp *micp);
+
+bool bt_micp_set_debug(struct bt_micp *micp, bt_micp_debug_func_t func,
+ void *user_data, bt_micp_destroy_func_t destroy);
+
+struct bt_att *bt_micp_get_att(struct bt_micp *micp);
+
+bool bt_micp_set_user_data(struct bt_micp *micp, void *user_data);
+
+/* session related functions */
+unsigned int bt_micp_register(bt_micp_func_t attached, bt_micp_func_t detached,
+ void *user_data);
+unsigned int bt_micp_ready_register(struct bt_micp *micp,
+ bt_micp_ready_func_t func, void *user_data,
+ bt_micp_destroy_func_t destroy);
+bool bt_micp_ready_unregister(struct bt_micp *micp, unsigned int id);
+
+bool bt_micp_unregister(unsigned int id);
+struct bt_micp *bt_micp_new(struct gatt_db *ldb, struct gatt_db *rdb);
+struct bt_mics *micp_get_mics(struct bt_micp *micp);
--
2.34.1
