/* 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.
*/
#include <stdint.h>
#include <syslog.h>
#include <sys/socket.h>
#include <unistd.h>
#include "cras_a2dp_endpoint.h"
#include "cras_bt_adapter.h"
#include "cras_bt_constants.h"
#include "cras_bt_profile.h"
#include "cras_hfp_ag_profile.h"
#include "cras_hfp_info.h"
#include "cras_hfp_iodev.h"
#include "cras_hfp_slc.h"
#include "cras_system_state.h"
#include "utlist.h"
#define STR(s) #s
#define VSTR(id) STR(id)
#define HFP_AG_PROFILE_NAME "Hands-Free Voice gateway"
#define HFP_AG_PROFILE_PATH "/org/chromium/Cras/Bluetooth/HFPAG"
#define HFP_VERSION_1_5 0x0105
#define HSP_AG_PROFILE_NAME "Headset Voice gateway"
#define HSP_AG_PROFILE_PATH "/org/chromium/Cras/Bluetooth/HSPAG"
#define HSP_VERSION_1_2 0x0102
#define HSP_AG_RECORD \
"<?xml version=\"1.0\" encoding=\"UTF-8\" ?>" \
"<record>" \
" <attribute id=\"0x0001\">" \
" <sequence>" \
" <uuid value=\"" HSP_AG_UUID "\" />" \
" <uuid value=\"" GENERIC_AUDIO_UUID "\" />" \
" </sequence>" \
" </attribute>" \
" <attribute id=\"0x0004\">" \
" <sequence>" \
" <sequence>" \
" <uuid value=\"0x0100\" />" \
" </sequence>" \
" <sequence>" \
" <uuid value=\"0x0003\" />" \
" <uint8 value=\"0x0c\" />" \
" </sequence>" \
" </sequence>" \
" </attribute>" \
" <attribute id=\"0x0005\">" \
" <sequence>" \
" <uuid value=\"0x1002\" />" \
" </sequence>" \
" </attribute>" \
" <attribute id=\"0x0009\">" \
" <sequence>" \
" <sequence>" \
" <uuid value=\"" HSP_HS_UUID "\" />" \
" <uint16 value=\"" VSTR(HSP_VERSION_1_2) "\" />" \
" </sequence>" \
" </sequence>" \
" </attribute>" \
" <attribute id=\"0x0100\">" \
" <text value=\"" HSP_AG_PROFILE_NAME "\" />" \
" </attribute>" \
" <attribute id=\"0x0301\" >" \
" <uint8 value=\"0x01\" />" \
" </attribute>" \
"</record>"
/* Object representing the audio gateway role for HFP/HSP.
* Members:
* idev - The input iodev for HFP/HSP.
* odev - The output iodev for HFP/HSP.
* info - The hfp_info object for SCO audio.
* slc_handle - The service level connection.
* device - The bt device associated with this audio gateway.
* a2dp_delay_retries - The number of retries left to delay starting
* the hfp/hsp audio gateway to wait for a2dp connection.
* conn - The dbus connection used to send message to bluetoothd.
* profile - The profile enum of this audio gateway.
*/
struct audio_gateway {
struct cras_iodev *idev;
struct cras_iodev *odev;
struct hfp_info *info;
struct hfp_slc_handle *slc_handle;
struct cras_bt_device *device;
int a2dp_delay_retries;
DBusConnection *conn;
enum cras_bt_device_profile profile;
struct audio_gateway *prev, *next;
};
static struct audio_gateway *connected_ags;
static void destroy_audio_gateway(struct audio_gateway *ag)
{
DL_DELETE(connected_ags, ag);
if (ag->idev)
hfp_iodev_destroy(ag->idev);
if (ag->odev)
hfp_iodev_destroy(ag->odev);
if (ag->info) {
if (hfp_info_running(ag->info))
hfp_info_stop(ag->info);
hfp_info_destroy(ag->info);
}
if (ag->slc_handle)
hfp_slc_destroy(ag->slc_handle);
/* If the bt device is not using a2dp, do a deeper clean up
* to force disconnect it. */
if (!cras_bt_device_has_a2dp(ag->device))
cras_bt_device_disconnect(ag->conn, ag->device);
free(ag);
}
/* Checks if there already a audio gateway connected for device. */
static int has_audio_gateway(struct cras_bt_device *device)
{
struct audio_gateway *ag;
DL_FOREACH(connected_ags, ag) {
if (ag->device == device)
return 1;
}
return 0;
}
static void cras_hfp_ag_release(struct cras_bt_profile *profile)
{
cras_hfp_ag_suspend();
}
/* Callback triggered when SLC is initialized. */
static int cras_hfp_ag_slc_initialized(struct hfp_slc_handle *handle)
{
struct audio_gateway *ag;
DL_SEARCH_SCALAR(connected_ags, ag, slc_handle, handle);
if (!ag)
return -EINVAL;
/* Defer the starting of audio gateway to bt_device. */
return cras_bt_device_audio_gateway_initialized(ag->device);
}
static int cras_hfp_ag_slc_disconnected(struct hfp_slc_handle *handle)
{
struct audio_gateway *ag;
DL_SEARCH_SCALAR(connected_ags, ag, slc_handle, handle);
if (!ag)
return -EINVAL;
destroy_audio_gateway(ag);
return 0;
}
static int check_for_conflict_ag(struct cras_bt_device *new_connected)
{
struct audio_gateway *ag;
/* Check if there's already an A2DP/HFP device. */
DL_FOREACH(connected_ags, ag) {
if (cras_bt_device_has_a2dp(ag->device))
return -1;
}
/* Check if there's already an A2DP-only device. */
if (cras_a2dp_connected_device() &&
cras_bt_device_supports_profile(
new_connected, CRAS_BT_DEVICE_PROFILE_A2DP_SINK))
return -1;
return 0;
}
static void possibly_remove_conflict_dev(void *data)
{
struct cras_bt_device *device = (struct cras_bt_device *)data;
struct audio_gateway *ag, *new_ag = NULL;
struct cras_bt_device *a2dp_device;
/* Check if the device is still connected. */
DL_FOREACH(connected_ags, ag) {
if (ag->device == device)
new_ag = ag;
}
if (!new_ag)
return;
/* Kick out any previously connected hfp iodev. */
DL_FOREACH(connected_ags, ag) {
if (ag == new_ag)
continue;
destroy_audio_gateway(ag);
}
/* Kick out any previously connected a2dp iodev. */
a2dp_device = cras_a2dp_connected_device();
if (a2dp_device && a2dp_device != device) {
cras_a2dp_suspend_connected_device(a2dp_device);
cras_bt_device_disconnect(new_ag->conn, a2dp_device);
}
}
static int cras_hfp_ag_new_connection(DBusConnection *conn,
struct cras_bt_profile *profile,
struct cras_bt_device *device,
int rfcomm_fd)
{
struct audio_gateway *ag;
if (has_audio_gateway(device)) {
syslog(LOG_ERR, "Audio gateway exists when %s connects for profile %s",
cras_bt_device_name(device), profile->name);
close(rfcomm_fd);
return 0;
}
if (check_for_conflict_ag(device))
return -1;
cras_bt_device_set_append_iodev_cb(device, possibly_remove_conflict_dev);
ag = (struct audio_gateway *)calloc(1, sizeof(*ag));
ag->device = device;
ag->conn = conn;
ag->profile = cras_bt_device_profile_from_uuid(profile->uuid);
ag->slc_handle = hfp_slc_create(rfcomm_fd,
0,
device,
cras_hfp_ag_slc_initialized,
cras_hfp_ag_slc_disconnected);
DL_APPEND(connected_ags, ag);
return 0;
}
static void cras_hfp_ag_request_disconnection(struct cras_bt_profile *profile,
struct cras_bt_device *device)
{
struct audio_gateway *ag;
DL_FOREACH(connected_ags, ag) {
if (ag->slc_handle && ag->device == device)
destroy_audio_gateway(ag);
}
}
static void cras_hfp_ag_cancel(struct cras_bt_profile *profile)
{
}
static struct cras_bt_profile cras_hfp_ag_profile = {
.name = HFP_AG_PROFILE_NAME,
.object_path = HFP_AG_PROFILE_PATH,
.uuid = HFP_AG_UUID,
.version = HFP_VERSION_1_5,
.role = NULL,
.features = HFP_SUPPORTED_FEATURE & 0x1F,
.record = NULL,
.release = cras_hfp_ag_release,
.new_connection = cras_hfp_ag_new_connection,
.request_disconnection = cras_hfp_ag_request_disconnection,
.cancel = cras_hfp_ag_cancel
};
int cras_hfp_ag_profile_create(DBusConnection *conn)
{
return cras_bt_add_profile(conn, &cras_hfp_ag_profile);
}
static int cras_hsp_ag_new_connection(DBusConnection *conn,
struct cras_bt_profile *profile,
struct cras_bt_device *device,
int rfcomm_fd)
{
struct audio_gateway *ag;
if (has_audio_gateway(device)) {
syslog(LOG_ERR, "Audio gateway exists when %s connects for profile %s",
cras_bt_device_name(device), profile->name);
close(rfcomm_fd);
return 0;
}
if (check_for_conflict_ag(device))
return -1;
cras_bt_device_set_append_iodev_cb(device, possibly_remove_conflict_dev);
ag = (struct audio_gateway *)calloc(1, sizeof(*ag));
ag->device = device;
ag->conn = conn;
ag->profile = cras_bt_device_profile_from_uuid(profile->uuid);
ag->slc_handle = hfp_slc_create(rfcomm_fd, 1, device, NULL,
cras_hfp_ag_slc_disconnected);
DL_APPEND(connected_ags, ag);
cras_hfp_ag_slc_initialized(ag->slc_handle);
return 0;
}
static struct cras_bt_profile cras_hsp_ag_profile = {
.name = HSP_AG_PROFILE_NAME,
.object_path = HSP_AG_PROFILE_PATH,
.uuid = HSP_AG_UUID,
.version = HSP_VERSION_1_2,
.role = NULL,
.record = HSP_AG_RECORD,
.release = cras_hfp_ag_release,
.new_connection = cras_hsp_ag_new_connection,
.request_disconnection = cras_hfp_ag_request_disconnection,
.cancel = cras_hfp_ag_cancel
};
int cras_hfp_ag_start(struct cras_bt_device *device)
{
struct audio_gateway *ag;
DL_SEARCH_SCALAR(connected_ags, ag, device, device);
if (ag == NULL)
return -EEXIST;
ag->info = hfp_info_create();
ag->idev = hfp_iodev_create(CRAS_STREAM_INPUT, ag->device,
ag->slc_handle,
ag->profile, ag->info);
ag->odev = hfp_iodev_create(CRAS_STREAM_OUTPUT, ag->device,
ag->slc_handle,
ag->profile, ag->info);
if (!ag->idev && !ag->odev) {
destroy_audio_gateway(ag);
return -ENOMEM;
}
return 0;
}
void cras_hfp_ag_suspend()
{
struct audio_gateway *ag;
DL_FOREACH(connected_ags, ag)
destroy_audio_gateway(ag);
}
void cras_hfp_ag_suspend_connected_device(struct cras_bt_device *device)
{
struct audio_gateway *ag;
DL_SEARCH_SCALAR(connected_ags, ag, device, device);
if (ag)
destroy_audio_gateway(ag);
}
struct hfp_slc_handle *cras_hfp_ag_get_active_handle()
{
/* Returns the first handle for HFP qualification. In future we
* might want this to return the HFP device user is selected. */
return connected_ags ? connected_ags->slc_handle : NULL;
}
struct hfp_slc_handle *cras_hfp_ag_get_slc(struct cras_bt_device *device)
{
struct audio_gateway *ag;
DL_FOREACH(connected_ags, ag) {
if (ag->device == device)
return ag->slc_handle;
}
return NULL;
}
int cras_hsp_ag_profile_create(DBusConnection *conn)
{
return cras_bt_add_profile(conn, &cras_hsp_ag_profile);
}