/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved. * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #ifndef _GNU_SOURCE #define _GNU_SOURCE /* for ppoll */ #endif #include #include #include #include #include #include #include #include #include #include "bluetooth.h" #include "cras_a2dp_endpoint.h" #include "cras_bt_adapter.h" #include "cras_bt_device.h" #include "cras_bt_constants.h" #include "cras_bt_log.h" #include "cras_bt_io.h" #include "cras_bt_profile.h" #include "cras_hfp_ag_profile.h" #include "cras_hfp_slc.h" #include "cras_iodev.h" #include "cras_iodev_list.h" #include "cras_main_message.h" #include "cras_system_state.h" #include "cras_tm.h" #include "utlist.h" /* * Bluetooth Core 5.0 spec, vol 4, part B, section 2 describes * the recommended HCI packet size in one USB transfer for CVSD * and MSBC codec. */ #define USB_MSBC_PKT_SIZE 60 #define USB_CVSD_PKT_SIZE 48 #define DEFAULT_SCO_PKT_SIZE USB_CVSD_PKT_SIZE static const unsigned int PROFILE_SWITCH_DELAY_MS = 500; static const unsigned int PROFILE_DROP_SUSPEND_DELAY_MS = 5000; /* Check profile connections every 2 seconds and rerty 30 times maximum. * Attemp to connect profiles which haven't been ready every 3 retries. */ static const unsigned int CONN_WATCH_PERIOD_MS = 2000; static const unsigned int CONN_WATCH_MAX_RETRIES = 30; static const unsigned int PROFILE_CONN_RETRIES = 3; static const unsigned int CRAS_SUPPORTED_PROFILES = CRAS_BT_DEVICE_PROFILE_A2DP_SINK | CRAS_BT_DEVICE_PROFILE_HFP_HANDSFREE | CRAS_BT_DEVICE_PROFILE_HSP_AUDIOGATEWAY; /* Object to represent a general bluetooth device, and used to * associate with some CRAS modules if it supports audio. * Members: * conn - The dbus connection object used to send message to bluetoothd. * object_path - Object path of the bluetooth device. * adapter - The object path of the adapter associates with this device. * address - The BT address of this device. * name - The readable name of this device. * bluetooth_class - The bluetooth class of this device. * paired - If this device is paired. * trusted - If this device is trusted. * connected - If this devices is connected. * connected_profiles - OR'ed all connected audio profiles. * profiles - OR'ed by all audio profiles this device supports. * bt_iodevs - The pointer to the cras_iodevs of this device. * active_profile - The flag to indicate the active audio profile this * device is currently using. * conn_watch_retries - The retry count for conn_watch_timer. * conn_watch_timer - The timer used to watch connected profiles and start * BT audio input/ouput when all profiles are ready. * suspend_timer - The timer used to suspend device. * switch_profile_timer - The timer used to delay enabling iodev after * profile switch. * sco_fd - The file descriptor of the SCO connection. * sco_ref_count - The reference counts of the SCO connection. */ struct cras_bt_device { DBusConnection *conn; char *object_path; char *adapter_obj_path; char *address; char *name; uint32_t bluetooth_class; int paired; int trusted; int connected; enum cras_bt_device_profile connected_profiles; enum cras_bt_device_profile profiles; struct cras_iodev *bt_iodevs[CRAS_NUM_DIRECTIONS]; unsigned int active_profile; int use_hardware_volume; int conn_watch_retries; struct cras_timer *conn_watch_timer; struct cras_timer *suspend_timer; struct cras_timer *switch_profile_timer; int sco_fd; size_t sco_ref_count; struct cras_bt_device *prev, *next; }; enum BT_DEVICE_COMMAND { BT_DEVICE_CANCEL_SUSPEND, BT_DEVICE_SCHEDULE_SUSPEND, BT_DEVICE_SWITCH_PROFILE, BT_DEVICE_SWITCH_PROFILE_ENABLE_DEV, }; struct bt_device_msg { struct cras_main_message header; enum BT_DEVICE_COMMAND cmd; struct cras_bt_device *device; struct cras_iodev *dev; unsigned int arg; }; static struct cras_bt_device *devices; enum cras_bt_device_profile cras_bt_device_profile_from_uuid(const char *uuid) { if (strcmp(uuid, HSP_HS_UUID) == 0) return CRAS_BT_DEVICE_PROFILE_HSP_HEADSET; else if (strcmp(uuid, HSP_AG_UUID) == 0) return CRAS_BT_DEVICE_PROFILE_HSP_AUDIOGATEWAY; else if (strcmp(uuid, HFP_HF_UUID) == 0) return CRAS_BT_DEVICE_PROFILE_HFP_HANDSFREE; else if (strcmp(uuid, HFP_AG_UUID) == 0) return CRAS_BT_DEVICE_PROFILE_HFP_AUDIOGATEWAY; else if (strcmp(uuid, A2DP_SOURCE_UUID) == 0) return CRAS_BT_DEVICE_PROFILE_A2DP_SOURCE; else if (strcmp(uuid, A2DP_SINK_UUID) == 0) return CRAS_BT_DEVICE_PROFILE_A2DP_SINK; else if (strcmp(uuid, AVRCP_REMOTE_UUID) == 0) return CRAS_BT_DEVICE_PROFILE_AVRCP_REMOTE; else if (strcmp(uuid, AVRCP_TARGET_UUID) == 0) return CRAS_BT_DEVICE_PROFILE_AVRCP_TARGET; else return 0; } struct cras_bt_device *cras_bt_device_create(DBusConnection *conn, const char *object_path) { struct cras_bt_device *device; device = calloc(1, sizeof(*device)); if (device == NULL) return NULL; device->conn = conn; device->object_path = strdup(object_path); if (device->object_path == NULL) { free(device); return NULL; } DL_APPEND(devices, device); return device; } static void on_connect_profile_reply(DBusPendingCall *pending_call, void *data) { DBusMessage *reply; reply = dbus_pending_call_steal_reply(pending_call); dbus_pending_call_unref(pending_call); if (dbus_message_get_type(reply) == DBUS_MESSAGE_TYPE_ERROR) syslog(LOG_ERR, "Connect profile message replied error: %s", dbus_message_get_error_name(reply)); dbus_message_unref(reply); } static void on_disconnect_reply(DBusPendingCall *pending_call, void *data) { DBusMessage *reply; reply = dbus_pending_call_steal_reply(pending_call); dbus_pending_call_unref(pending_call); if (dbus_message_get_type(reply) == DBUS_MESSAGE_TYPE_ERROR) syslog(LOG_ERR, "Disconnect message replied error"); dbus_message_unref(reply); } int cras_bt_device_connect_profile(DBusConnection *conn, struct cras_bt_device *device, const char *uuid) { DBusMessage *method_call; DBusError dbus_error; DBusPendingCall *pending_call; method_call = dbus_message_new_method_call(BLUEZ_SERVICE, device->object_path, BLUEZ_INTERFACE_DEVICE, "ConnectProfile"); if (!method_call) return -ENOMEM; if (!dbus_message_append_args(method_call, DBUS_TYPE_STRING, &uuid, DBUS_TYPE_INVALID)) return -ENOMEM; dbus_error_init(&dbus_error); pending_call = NULL; if (!dbus_connection_send_with_reply(conn, method_call, &pending_call, DBUS_TIMEOUT_USE_DEFAULT)) { dbus_message_unref(method_call); syslog(LOG_ERR, "Failed to send Disconnect message"); return -EIO; } dbus_message_unref(method_call); if (!dbus_pending_call_set_notify( pending_call, on_connect_profile_reply, conn, NULL)) { dbus_pending_call_cancel(pending_call); dbus_pending_call_unref(pending_call); return -EIO; } return 0; } int cras_bt_device_disconnect(DBusConnection *conn, struct cras_bt_device *device) { DBusMessage *method_call; DBusError dbus_error; DBusPendingCall *pending_call; method_call = dbus_message_new_method_call(BLUEZ_SERVICE, device->object_path, BLUEZ_INTERFACE_DEVICE, "Disconnect"); if (!method_call) return -ENOMEM; dbus_error_init(&dbus_error); pending_call = NULL; if (!dbus_connection_send_with_reply(conn, method_call, &pending_call, DBUS_TIMEOUT_USE_DEFAULT)) { dbus_message_unref(method_call); syslog(LOG_ERR, "Failed to send Disconnect message"); return -EIO; } dbus_message_unref(method_call); if (!dbus_pending_call_set_notify(pending_call, on_disconnect_reply, conn, NULL)) { dbus_pending_call_cancel(pending_call); dbus_pending_call_unref(pending_call); return -EIO; } return 0; } static void cras_bt_device_destroy(struct cras_bt_device *device) { struct cras_tm *tm = cras_system_state_get_tm(); DL_DELETE(devices, device); if (device->conn_watch_timer) cras_tm_cancel_timer(tm, device->conn_watch_timer); if (device->switch_profile_timer) cras_tm_cancel_timer(tm, device->switch_profile_timer); if (device->suspend_timer) cras_tm_cancel_timer(tm, device->suspend_timer); free(device->adapter_obj_path); free(device->object_path); free(device->address); free(device->name); free(device); } void cras_bt_device_remove(struct cras_bt_device *device) { /* * We expect BT stack to disconnect this device before removing it, * but it may not the case if there's issue at BT side. Print error * log whenever this happens. */ if (device->connected) syslog(LOG_ERR, "Removing dev with connected profiles %u", device->connected_profiles); /* * Possibly clean up the associated A2DP and HFP AG iodevs that are * still accessing this device. */ cras_a2dp_suspend_connected_device(device); cras_hfp_ag_suspend_connected_device(device); cras_bt_device_destroy(device); } void cras_bt_device_reset() { while (devices) { syslog(LOG_INFO, "Bluetooth Device: %s removed", devices->address); cras_bt_device_destroy(devices); } } struct cras_bt_device *cras_bt_device_get(const char *object_path) { struct cras_bt_device *device; DL_FOREACH (devices, device) { if (strcmp(device->object_path, object_path) == 0) return device; } return NULL; } const char *cras_bt_device_object_path(const struct cras_bt_device *device) { return device->object_path; } struct cras_bt_adapter * cras_bt_device_adapter(const struct cras_bt_device *device) { return cras_bt_adapter_get(device->adapter_obj_path); } const char *cras_bt_device_address(const struct cras_bt_device *device) { return device->address; } const char *cras_bt_device_name(const struct cras_bt_device *device) { return device->name; } int cras_bt_device_paired(const struct cras_bt_device *device) { return device->paired; } int cras_bt_device_trusted(const struct cras_bt_device *device) { return device->trusted; } int cras_bt_device_connected(const struct cras_bt_device *device) { return device->connected; } int cras_bt_device_supports_profile(const struct cras_bt_device *device, enum cras_bt_device_profile profile) { return !!(device->profiles & profile); } void cras_bt_device_append_iodev(struct cras_bt_device *device, struct cras_iodev *iodev, enum cras_bt_device_profile profile) { struct cras_iodev *bt_iodev; bt_iodev = device->bt_iodevs[iodev->direction]; if (bt_iodev) { cras_bt_io_append(bt_iodev, iodev, profile); } else { device->bt_iodevs[iodev->direction] = cras_bt_io_create(device, iodev, profile); } } static void bt_device_switch_profile(struct cras_bt_device *device, struct cras_iodev *bt_iodev, int enable_dev); void cras_bt_device_rm_iodev(struct cras_bt_device *device, struct cras_iodev *iodev) { struct cras_iodev *bt_iodev; int rc; bt_iodev = device->bt_iodevs[iodev->direction]; if (bt_iodev) { unsigned try_profile; /* Check what will the preffered profile be if we remove dev. */ try_profile = cras_bt_io_try_remove(bt_iodev, iodev); if (!try_profile) goto destroy_bt_io; /* If the check result doesn't match with the active * profile we are currently using, switch to the * preffered profile before actually remove the iodev. */ if (!cras_bt_io_on_profile(bt_iodev, try_profile)) { device->active_profile = try_profile; bt_device_switch_profile(device, bt_iodev, 0); } rc = cras_bt_io_remove(bt_iodev, iodev); if (rc) { syslog(LOG_ERR, "Fail to fallback to profile %u", try_profile); goto destroy_bt_io; } } return; destroy_bt_io: device->bt_iodevs[iodev->direction] = NULL; cras_bt_io_destroy(bt_iodev); if (!device->bt_iodevs[CRAS_STREAM_INPUT] && !device->bt_iodevs[CRAS_STREAM_OUTPUT]) cras_bt_device_set_active_profile(device, 0); } void cras_bt_device_a2dp_configured(struct cras_bt_device *device) { BTLOG(btlog, BT_A2DP_CONFIGURED, device->connected_profiles, 0); device->connected_profiles |= CRAS_BT_DEVICE_PROFILE_A2DP_SINK; } int cras_bt_device_has_a2dp(struct cras_bt_device *device) { struct cras_iodev *odev = device->bt_iodevs[CRAS_STREAM_OUTPUT]; /* Check if there is an output iodev with A2DP node attached. */ return odev && cras_bt_io_get_profile(odev, CRAS_BT_DEVICE_PROFILE_A2DP_SOURCE); } int cras_bt_device_can_switch_to_a2dp(struct cras_bt_device *device) { struct cras_iodev *idev = device->bt_iodevs[CRAS_STREAM_INPUT]; return cras_bt_device_has_a2dp(device) && (!idev || !cras_iodev_is_open(idev)); } static void bt_device_remove_conflict(struct cras_bt_device *device) { struct cras_bt_device *connected; /* Suspend other HFP audio gateways that conflict with device. */ cras_hfp_ag_remove_conflict(device); /* Check if there's conflict A2DP headset and suspend it. */ connected = cras_a2dp_connected_device(); if (connected && (connected != device)) cras_a2dp_suspend_connected_device(connected); } int cras_bt_device_audio_gateway_initialized(struct cras_bt_device *device) { BTLOG(btlog, BT_AUDIO_GATEWAY_INIT, device->profiles, 0); /* Marks HFP/HSP as connected. This is what connection watcher * checks. */ device->connected_profiles |= (CRAS_BT_DEVICE_PROFILE_HFP_HANDSFREE | CRAS_BT_DEVICE_PROFILE_HSP_HEADSET); return 0; } int cras_bt_device_get_active_profile(const struct cras_bt_device *device) { return device->active_profile; } void cras_bt_device_set_active_profile(struct cras_bt_device *device, unsigned int profile) { device->active_profile = profile; } static void cras_bt_device_log_profile(const struct cras_bt_device *device, enum cras_bt_device_profile profile) { switch (profile) { case CRAS_BT_DEVICE_PROFILE_HFP_HANDSFREE: syslog(LOG_DEBUG, "Bluetooth Device: %s is HFP handsfree", device->address); break; case CRAS_BT_DEVICE_PROFILE_HFP_AUDIOGATEWAY: syslog(LOG_DEBUG, "Bluetooth Device: %s is HFP audio gateway", device->address); break; case CRAS_BT_DEVICE_PROFILE_A2DP_SOURCE: syslog(LOG_DEBUG, "Bluetooth Device: %s is A2DP source", device->address); break; case CRAS_BT_DEVICE_PROFILE_A2DP_SINK: syslog(LOG_DEBUG, "Bluetooth Device: %s is A2DP sink", device->address); break; case CRAS_BT_DEVICE_PROFILE_AVRCP_REMOTE: syslog(LOG_DEBUG, "Bluetooth Device: %s is AVRCP remote", device->address); break; case CRAS_BT_DEVICE_PROFILE_AVRCP_TARGET: syslog(LOG_DEBUG, "Bluetooth Device: %s is AVRCP target", device->address); break; case CRAS_BT_DEVICE_PROFILE_HSP_HEADSET: syslog(LOG_DEBUG, "Bluetooth Device: %s is HSP headset", device->address); break; case CRAS_BT_DEVICE_PROFILE_HSP_AUDIOGATEWAY: syslog(LOG_DEBUG, "Bluetooth Device: %s is HSP audio gateway", device->address); break; } } static int cras_bt_device_is_profile_connected(const struct cras_bt_device *device, enum cras_bt_device_profile profile) { return !!(device->connected_profiles & profile); } static void bt_device_schedule_suspend(struct cras_bt_device *device, unsigned int msec); /* Callback used to periodically check if supported profiles are connected. */ static void bt_device_conn_watch_cb(struct cras_timer *timer, void *arg) { struct cras_tm *tm; struct cras_bt_device *device = (struct cras_bt_device *)arg; int rc; BTLOG(btlog, BT_DEV_CONN_WATCH_CB, device->conn_watch_retries, device->profiles); device->conn_watch_timer = NULL; /* Skip the callback if it is not an audio device. */ if (!device->profiles) return; /* If A2DP is not ready, try connect it after a while. */ if (cras_bt_device_supports_profile(device, CRAS_BT_DEVICE_PROFILE_A2DP_SINK) && !cras_bt_device_is_profile_connected( device, CRAS_BT_DEVICE_PROFILE_A2DP_SINK)) { if (0 == device->conn_watch_retries % PROFILE_CONN_RETRIES) cras_bt_device_connect_profile(device->conn, device, A2DP_SINK_UUID); goto arm_retry_timer; } /* If HFP is not ready, try connect it after a while. */ if (cras_bt_device_supports_profile( device, CRAS_BT_DEVICE_PROFILE_HFP_HANDSFREE) && !cras_bt_device_is_profile_connected( device, CRAS_BT_DEVICE_PROFILE_HFP_HANDSFREE)) { if (0 == device->conn_watch_retries % PROFILE_CONN_RETRIES) cras_bt_device_connect_profile(device->conn, device, HFP_HF_UUID); goto arm_retry_timer; } /* Expected profiles are all connected, no more connection watch * callback will be scheduled. * Base on the decision that we expose only the latest connected * BT audio device to user, treat all other connected devices as * conflict and remove them before we start A2DP/HFP of this device. */ bt_device_remove_conflict(device); if (cras_bt_device_is_profile_connected( device, CRAS_BT_DEVICE_PROFILE_A2DP_SINK)) cras_a2dp_start(device); if (cras_bt_device_is_profile_connected( device, CRAS_BT_DEVICE_PROFILE_HFP_HANDSFREE)) { rc = cras_hfp_ag_start(device); if (rc) { syslog(LOG_ERR, "Start audio gateway failed, rc %d", rc); bt_device_schedule_suspend(device, 0); } } return; arm_retry_timer: syslog(LOG_DEBUG, "conn_watch_retries: %d", device->conn_watch_retries); if (--device->conn_watch_retries) { tm = cras_system_state_get_tm(); device->conn_watch_timer = cras_tm_create_timer(tm, CONN_WATCH_PERIOD_MS, bt_device_conn_watch_cb, device); } else { syslog(LOG_ERR, "Connection watch timeout."); bt_device_schedule_suspend(device, 0); } } static void cras_bt_device_start_new_conn_watch_timer(struct cras_bt_device *device) { struct cras_tm *tm = cras_system_state_get_tm(); if (device->conn_watch_timer) { cras_tm_cancel_timer(tm, device->conn_watch_timer); } device->conn_watch_retries = CONN_WATCH_MAX_RETRIES; device->conn_watch_timer = cras_tm_create_timer( tm, CONN_WATCH_PERIOD_MS, bt_device_conn_watch_cb, device); } void cras_bt_device_set_connected(struct cras_bt_device *device, int value) { struct cras_tm *tm = cras_system_state_get_tm(); if (device->connected || value) BTLOG(btlog, BT_DEV_CONNECTED_CHANGE, device->profiles, value); if (device->connected && !value) { cras_bt_profile_on_device_disconnected(device); /* Device is disconnected, resets connected profiles. */ device->connected_profiles = 0; } device->connected = value; if (!device->connected && device->conn_watch_timer) { cras_tm_cancel_timer(tm, device->conn_watch_timer); device->conn_watch_timer = NULL; } } void cras_bt_device_notify_profile_dropped(struct cras_bt_device *device, enum cras_bt_device_profile profile) { device->connected_profiles &= !profile; /* If any profile, a2dp or hfp/hsp, has dropped for some reason, * we shall make sure this device is fully disconnected within * given time so that user does not see a headset stay connected * but works with partial function. */ bt_device_schedule_suspend(device, PROFILE_DROP_SUSPEND_DELAY_MS); } /* * Check if the uuid is of a new audio profile that isn't listed * as supported by device. * Args: * device - The BT device holding supported profiles bitmap. * uuid - UUID string from the device properties notified by BlueZ. * Returns: * True if uuid is a new audio profiles not already supported by device. */ int cras_bt_device_add_supported_profiles(struct cras_bt_device *device, const char *uuid) { enum cras_bt_device_profile profile = cras_bt_device_profile_from_uuid(uuid); if (profile == 0) return 0; /* Do nothing if this profile is not new. */ if (device->profiles & profile) return 0; /* Log this event as we might need to re-intialize the BT audio nodes * if new audio profile is reported for already connected device. */ if (device->connected && (profile & CRAS_SUPPORTED_PROFILES)) BTLOG(btlog, BT_NEW_AUDIO_PROFILE_AFTER_CONNECT, device->profiles, profile); device->profiles |= profile; cras_bt_device_log_profile(device, profile); return (profile & CRAS_SUPPORTED_PROFILES); } void cras_bt_device_update_properties(struct cras_bt_device *device, DBusMessageIter *properties_array_iter, DBusMessageIter *invalidated_array_iter) { int watch_needed = 0; while (dbus_message_iter_get_arg_type(properties_array_iter) != DBUS_TYPE_INVALID) { DBusMessageIter properties_dict_iter, variant_iter; const char *key; int type; dbus_message_iter_recurse(properties_array_iter, &properties_dict_iter); dbus_message_iter_get_basic(&properties_dict_iter, &key); dbus_message_iter_next(&properties_dict_iter); dbus_message_iter_recurse(&properties_dict_iter, &variant_iter); type = dbus_message_iter_get_arg_type(&variant_iter); if (type == DBUS_TYPE_STRING || type == DBUS_TYPE_OBJECT_PATH) { const char *value; dbus_message_iter_get_basic(&variant_iter, &value); if (strcmp(key, "Adapter") == 0) { free(device->adapter_obj_path); device->adapter_obj_path = strdup(value); } else if (strcmp(key, "Address") == 0) { free(device->address); device->address = strdup(value); } else if (strcmp(key, "Alias") == 0) { free(device->name); device->name = strdup(value); } } else if (type == DBUS_TYPE_UINT32) { uint32_t value; dbus_message_iter_get_basic(&variant_iter, &value); if (strcmp(key, "Class") == 0) device->bluetooth_class = value; } else if (type == DBUS_TYPE_BOOLEAN) { int value; dbus_message_iter_get_basic(&variant_iter, &value); if (strcmp(key, "Paired") == 0) { device->paired = value; } else if (strcmp(key, "Trusted") == 0) { device->trusted = value; } else if (strcmp(key, "Connected") == 0) { cras_bt_device_set_connected(device, value); watch_needed = device->connected && cras_bt_device_supports_profile( device, CRAS_SUPPORTED_PROFILES); } } else if (strcmp(dbus_message_iter_get_signature(&variant_iter), "as") == 0 && strcmp(key, "UUIDs") == 0) { DBusMessageIter uuid_array_iter; dbus_message_iter_recurse(&variant_iter, &uuid_array_iter); while (dbus_message_iter_get_arg_type( &uuid_array_iter) != DBUS_TYPE_INVALID) { const char *uuid; dbus_message_iter_get_basic(&uuid_array_iter, &uuid); /* * If updated properties includes new audio * profile, and device is connected, we need * to start connection watcher. This is needed * because on some bluetooth device, supported * profiles do not present when device * interface is added and they are updated * later. */ if (cras_bt_device_add_supported_profiles( device, uuid)) watch_needed = device->connected; dbus_message_iter_next(&uuid_array_iter); } } dbus_message_iter_next(properties_array_iter); } while (invalidated_array_iter && dbus_message_iter_get_arg_type(invalidated_array_iter) != DBUS_TYPE_INVALID) { const char *key; dbus_message_iter_get_basic(invalidated_array_iter, &key); if (strcmp(key, "Adapter") == 0) { free(device->adapter_obj_path); device->adapter_obj_path = NULL; } else if (strcmp(key, "Address") == 0) { free(device->address); device->address = NULL; } else if (strcmp(key, "Alias") == 0) { free(device->name); device->name = NULL; } else if (strcmp(key, "Class") == 0) { device->bluetooth_class = 0; } else if (strcmp(key, "Paired") == 0) { device->paired = 0; } else if (strcmp(key, "Trusted") == 0) { device->trusted = 0; } else if (strcmp(key, "Connected") == 0) { device->connected = 0; } else if (strcmp(key, "UUIDs") == 0) { device->profiles = 0; } dbus_message_iter_next(invalidated_array_iter); } if (watch_needed) cras_bt_device_start_new_conn_watch_timer(device); } /* Converts bluetooth address string into sockaddr structure. The address * string is expected of the form 1A:2B:3C:4D:5E:6F, and each of the six * hex values will be parsed into sockaddr in inverse order. * Args: * str - The string version of bluetooth address * addr - The struct to be filled with converted address */ static int bt_address(const char *str, struct sockaddr *addr) { int i; if (strlen(str) != 17) { syslog(LOG_ERR, "Invalid bluetooth address %s", str); return -1; } memset(addr, 0, sizeof(*addr)); addr->sa_family = AF_BLUETOOTH; for (i = 5; i >= 0; i--) { addr->sa_data[i] = (unsigned char)strtol(str, NULL, 16); str += 3; } return 0; } /* Apply codec specific settings to the socket fd. */ static int apply_codec_settings(int fd, uint8_t codec) { struct bt_voice voice; memset(&voice, 0, sizeof(voice)); if (codec == HFP_CODEC_ID_CVSD) return 0; if (codec != HFP_CODEC_ID_MSBC) { syslog(LOG_ERR, "Unsupported codec %d", codec); return -1; } voice.setting = BT_VOICE_TRANSPARENT; if (setsockopt(fd, SOL_BLUETOOTH, BT_VOICE, &voice, sizeof(voice)) < 0) { syslog(LOG_ERR, "Failed to apply voice setting"); return -1; } return 0; } int cras_bt_device_sco_connect(struct cras_bt_device *device, int codec) { int sk = 0, err; struct sockaddr addr; struct cras_bt_adapter *adapter; struct timespec timeout = { 1, 0 }; struct pollfd *pollfds; adapter = cras_bt_device_adapter(device); if (!adapter) { syslog(LOG_ERR, "No adapter found for device %s at SCO connect", cras_bt_device_object_path(device)); goto error; } sk = socket(PF_BLUETOOTH, SOCK_SEQPACKET | O_NONBLOCK | SOCK_CLOEXEC, BTPROTO_SCO); if (sk < 0) { syslog(LOG_ERR, "Failed to create socket: %s (%d)", strerror(errno), errno); return -errno; } /* Bind to local address */ if (bt_address(cras_bt_adapter_address(adapter), &addr)) goto error; if (bind(sk, (struct sockaddr *)&addr, sizeof(addr)) < 0) { syslog(LOG_ERR, "Failed to bind socket: %s (%d)", strerror(errno), errno); goto error; } /* Connect to remote in nonblocking mode */ fcntl(sk, F_SETFL, O_NONBLOCK); pollfds = (struct pollfd *)malloc(sizeof(*pollfds)); pollfds[0].fd = sk; pollfds[0].events = POLLOUT; if (bt_address(cras_bt_device_address(device), &addr)) goto error; err = apply_codec_settings(sk, codec); if (err) goto error; err = connect(sk, (struct sockaddr *)&addr, sizeof(addr)); if (err && errno != EINPROGRESS) { syslog(LOG_ERR, "Failed to connect: %s (%d)", strerror(errno), errno); goto error; } err = ppoll(pollfds, 1, &timeout, NULL); if (err <= 0) { syslog(LOG_ERR, "Connect SCO: poll for writable timeout"); goto error; } if (pollfds[0].revents & (POLLERR | POLLHUP)) { syslog(LOG_ERR, "SCO socket error, revents: %u", pollfds[0].revents); bt_device_schedule_suspend(device, 0); goto error; } BTLOG(btlog, BT_SCO_CONNECT, 1, sk); return sk; error: BTLOG(btlog, BT_SCO_CONNECT, 0, sk); if (sk) close(sk); return -1; } int cras_bt_device_sco_packet_size(struct cras_bt_device *device, int sco_socket, int codec) { struct sco_options so; socklen_t len = sizeof(so); struct cras_bt_adapter *adapter; adapter = cras_bt_adapter_get(device->adapter_obj_path); if (cras_bt_adapter_on_usb(adapter)) { return (codec == HFP_CODEC_ID_MSBC) ? USB_MSBC_PKT_SIZE : USB_CVSD_PKT_SIZE; } /* For non-USB cases, query the SCO MTU from driver. */ if (getsockopt(sco_socket, SOL_SCO, SCO_OPTIONS, &so, &len) < 0) { syslog(LOG_ERR, "Get SCO options error: %s", strerror(errno)); return DEFAULT_SCO_PKT_SIZE; } return so.mtu; } void cras_bt_device_set_use_hardware_volume(struct cras_bt_device *device, int use_hardware_volume) { struct cras_iodev *iodev; device->use_hardware_volume = use_hardware_volume; iodev = device->bt_iodevs[CRAS_STREAM_OUTPUT]; if (iodev) iodev->software_volume_needed = !use_hardware_volume; } int cras_bt_device_get_use_hardware_volume(struct cras_bt_device *device) { return device->use_hardware_volume; } static void init_bt_device_msg(struct bt_device_msg *msg, enum BT_DEVICE_COMMAND cmd, struct cras_bt_device *device, struct cras_iodev *dev, unsigned int arg) { memset(msg, 0, sizeof(*msg)); msg->header.type = CRAS_MAIN_BT; msg->header.length = sizeof(*msg); msg->cmd = cmd; msg->device = device; msg->dev = dev; msg->arg = arg; } int cras_bt_device_cancel_suspend(struct cras_bt_device *device) { struct bt_device_msg msg; int rc; init_bt_device_msg(&msg, BT_DEVICE_CANCEL_SUSPEND, device, NULL, 0); rc = cras_main_message_send((struct cras_main_message *)&msg); return rc; } int cras_bt_device_schedule_suspend(struct cras_bt_device *device, unsigned int msec) { struct bt_device_msg msg; int rc; init_bt_device_msg(&msg, BT_DEVICE_SCHEDULE_SUSPEND, device, NULL, msec); rc = cras_main_message_send((struct cras_main_message *)&msg); return rc; } /* This diagram describes how the profile switching happens. When * certain conditions met, bt iodev will call the APIs below to interact * with main thread to switch to another active profile. * * Audio thread: * +--------------------------------------------------------------+ * | bt iodev | * | +------------------+ +-----------------+ | * | | condition met to | | open, close, or | | * | +--| change profile |<---| append profile |<--+ | * | | +------------------+ +-----------------+ | | * +-----------|------------------------------------------------|-+ * | | * Main thread: | * +-----------|------------------------------------------------|-+ * | | | | * | | +------------+ +----------------+ | | * | +----->| set active |---->| switch profile |-----+ | * | | profile | +----------------+ | * | bt device +------------+ | * +--------------------------------------------------------------+ */ int cras_bt_device_switch_profile_enable_dev(struct cras_bt_device *device, struct cras_iodev *bt_iodev) { struct bt_device_msg msg; int rc; init_bt_device_msg(&msg, BT_DEVICE_SWITCH_PROFILE_ENABLE_DEV, device, bt_iodev, 0); rc = cras_main_message_send((struct cras_main_message *)&msg); return rc; } int cras_bt_device_switch_profile(struct cras_bt_device *device, struct cras_iodev *bt_iodev) { struct bt_device_msg msg; int rc; init_bt_device_msg(&msg, BT_DEVICE_SWITCH_PROFILE, device, bt_iodev, 0); rc = cras_main_message_send((struct cras_main_message *)&msg); return rc; } static void profile_switch_delay_cb(struct cras_timer *timer, void *arg) { struct cras_bt_device *device = (struct cras_bt_device *)arg; struct cras_iodev *iodev; device->switch_profile_timer = NULL; iodev = device->bt_iodevs[CRAS_STREAM_OUTPUT]; if (!iodev) return; /* * During the |PROFILE_SWITCH_DELAY_MS| time interval, BT iodev could * have been enabled by others, and its active profile may have changed. * If iodev has been enabled, that means it has already picked up a * reasonable profile to use and audio thread is accessing iodev now. * We should NOT call into update_active_node from main thread * because that may mess up the active node content. */ iodev->update_active_node(iodev, 0, 1); cras_iodev_list_resume_dev(iodev->info.idx); } static void bt_device_switch_profile_with_delay(struct cras_bt_device *device, unsigned int delay_ms) { struct cras_tm *tm = cras_system_state_get_tm(); if (device->switch_profile_timer) { cras_tm_cancel_timer(tm, device->switch_profile_timer); device->switch_profile_timer = NULL; } device->switch_profile_timer = cras_tm_create_timer( tm, delay_ms, profile_switch_delay_cb, device); } /* Switches associated bt iodevs to use the active profile. This is * achieved by close the iodevs, update their active nodes, and then * finally reopen them. */ static void bt_device_switch_profile(struct cras_bt_device *device, struct cras_iodev *bt_iodev, int enable_dev) { struct cras_iodev *iodev; int dir; /* If a bt iodev is active, temporarily force close it. * Note that we need to check all bt_iodevs for the situation that both * input and output are active while switches from HFP/HSP to A2DP. */ for (dir = 0; dir < CRAS_NUM_DIRECTIONS; dir++) { iodev = device->bt_iodevs[dir]; if (!iodev) continue; cras_iodev_list_suspend_dev(iodev->info.idx); } for (dir = 0; dir < CRAS_NUM_DIRECTIONS; dir++) { iodev = device->bt_iodevs[dir]; if (!iodev) continue; /* If the iodev was active or this profile switching is * triggered at opening iodev, add it to active dev list. * However for the output iodev, adding it back to active dev * list could cause immediate switching from HFP to A2DP if * there exists an output stream. Certain headset/speaker * would fail to playback afterwards when the switching happens * too soon, so put this task in a delayed callback. */ if (dir == CRAS_STREAM_INPUT) { iodev->update_active_node(iodev, 0, 1); cras_iodev_list_resume_dev(iodev->info.idx); } else { bt_device_switch_profile_with_delay( device, PROFILE_SWITCH_DELAY_MS); } } } static void bt_device_suspend_cb(struct cras_timer *timer, void *arg) { struct cras_bt_device *device = (struct cras_bt_device *)arg; BTLOG(btlog, BT_DEV_SUSPEND_CB, device->profiles, device->connected_profiles); device->suspend_timer = NULL; cras_a2dp_suspend_connected_device(device); cras_hfp_ag_suspend_connected_device(device); cras_bt_device_disconnect(device->conn, device); } static void bt_device_schedule_suspend(struct cras_bt_device *device, unsigned int msec) { struct cras_tm *tm = cras_system_state_get_tm(); if (device->suspend_timer) return; device->suspend_timer = cras_tm_create_timer(tm, msec, bt_device_suspend_cb, device); } static void bt_device_cancel_suspend(struct cras_bt_device *device) { struct cras_tm *tm = cras_system_state_get_tm(); if (device->suspend_timer == NULL) return; cras_tm_cancel_timer(tm, device->suspend_timer); device->suspend_timer = NULL; } static void bt_device_process_msg(struct cras_main_message *msg, void *arg) { struct bt_device_msg *bt_msg = (struct bt_device_msg *)msg; struct cras_bt_device *device = NULL; DL_FOREACH (devices, device) { if (device == bt_msg->device) break; } /* Do nothing if target device no longer exists. */ if (device == NULL) return; switch (bt_msg->cmd) { case BT_DEVICE_SWITCH_PROFILE: bt_device_switch_profile(bt_msg->device, bt_msg->dev, 0); break; case BT_DEVICE_SWITCH_PROFILE_ENABLE_DEV: bt_device_switch_profile(bt_msg->device, bt_msg->dev, 1); break; case BT_DEVICE_SCHEDULE_SUSPEND: bt_device_schedule_suspend(bt_msg->device, bt_msg->arg); break; case BT_DEVICE_CANCEL_SUSPEND: bt_device_cancel_suspend(bt_msg->device); break; default: break; } } void cras_bt_device_start_monitor() { cras_main_message_add_handler(CRAS_MAIN_BT, bt_device_process_msg, NULL); } void cras_bt_device_update_hardware_volume(struct cras_bt_device *device, int volume) { struct cras_iodev *iodev; iodev = device->bt_iodevs[CRAS_STREAM_OUTPUT]; if (iodev == NULL) return; /* Check if this BT device is okay to use hardware volume. If not * then ignore the reported volume change event. */ if (!cras_bt_device_get_use_hardware_volume(device)) return; iodev->active_node->volume = volume; cras_iodev_list_notify_node_volume(iodev->active_node); } int cras_bt_device_get_sco(struct cras_bt_device *device, int codec) { if (device->sco_ref_count == 0) { device->sco_fd = cras_bt_device_sco_connect(device, codec); if (device->sco_fd < 0) return device->sco_fd; } ++device->sco_ref_count; return 0; } void cras_bt_device_put_sco(struct cras_bt_device *device) { if (device->sco_ref_count == 0) return; if (--device->sco_ref_count == 0) close(device->sco_fd); }