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PL286/system/bt/stack/hid/hidh_api.cc

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/******************************************************************************
*
* Copyright (C) 2002-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/******************************************************************************
*
* This file contains the HID HOST API entry points
*
******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "bt_common.h"
#include "bt_types.h"
#include "btm_api.h"
#include "btm_int.h"
#include "btu.h"
#include "hiddefs.h"
#include "hidh_api.h"
#include "hidh_int.h"
tHID_HOST_CTB hh_cb;
static void hidh_search_callback(uint16_t sdp_result);
/*******************************************************************************
*
* Function HID_HostGetSDPRecord
*
* Description This function reads the device SDP record
*
* Returns tHID_STATUS
*
******************************************************************************/
tHID_STATUS HID_HostGetSDPRecord(const RawAddress& addr,
tSDP_DISCOVERY_DB* p_db, uint32_t db_len,
tHID_HOST_SDP_CALLBACK* sdp_cback) {
tSDP_UUID uuid_list;
if (hh_cb.sdp_busy) return HID_ERR_SDP_BUSY;
uuid_list.len = 2;
uuid_list.uu.uuid16 = UUID_SERVCLASS_HUMAN_INTERFACE;
hh_cb.p_sdp_db = p_db;
SDP_InitDiscoveryDb(p_db, db_len, 1, &uuid_list, 0, NULL);
if (SDP_ServiceSearchRequest(addr, p_db, hidh_search_callback)) {
hh_cb.sdp_cback = sdp_cback;
hh_cb.sdp_busy = true;
return HID_SUCCESS;
} else
return HID_ERR_NO_RESOURCES;
}
void hidh_get_str_attr(tSDP_DISC_REC* p_rec, uint16_t attr_id, uint16_t max_len,
char* str) {
tSDP_DISC_ATTR* p_attr;
uint16_t name_len;
p_attr = SDP_FindAttributeInRec(p_rec, attr_id);
if (p_attr != NULL) {
name_len = SDP_DISC_ATTR_LEN(p_attr->attr_len_type);
if (name_len < max_len) {
memcpy(str, (char*)p_attr->attr_value.v.array, name_len);
str[name_len] = '\0';
} else {
memcpy(str, (char*)p_attr->attr_value.v.array, max_len - 1);
str[max_len - 1] = '\0';
}
} else
str[0] = '\0';
}
static void hidh_search_callback(uint16_t sdp_result) {
tSDP_DISCOVERY_DB* p_db = hh_cb.p_sdp_db;
tSDP_DISC_REC* p_rec;
tSDP_DISC_ATTR *p_attr, *p_subattr1, *p_subattr2, *p_repdesc;
tBT_UUID hid_uuid;
tHID_DEV_SDP_INFO* p_nvi = &hh_cb.sdp_rec;
uint16_t attr_mask = 0;
hid_uuid.len = LEN_UUID_16;
hid_uuid.uu.uuid16 = UUID_SERVCLASS_HUMAN_INTERFACE;
hh_cb.sdp_busy = false;
if (sdp_result != SDP_SUCCESS) {
hh_cb.sdp_cback(sdp_result, 0, NULL);
return;
}
p_rec = SDP_FindServiceUUIDInDb(p_db, &hid_uuid, NULL);
if (p_rec == NULL) {
hh_cb.sdp_cback(HID_SDP_NO_SERV_UUID, 0, NULL);
return;
}
memset(&hh_cb.sdp_rec, 0, sizeof(tHID_DEV_SDP_INFO));
/* First, verify the mandatory fields we care about */
if (((p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_HID_DESCRIPTOR_LIST)) ==
NULL) ||
(SDP_DISC_ATTR_TYPE(p_attr->attr_len_type) != DATA_ELE_SEQ_DESC_TYPE) ||
((p_subattr1 = p_attr->attr_value.v.p_sub_attr) == NULL) ||
(SDP_DISC_ATTR_TYPE(p_subattr1->attr_len_type) !=
DATA_ELE_SEQ_DESC_TYPE) ||
((p_subattr2 = p_subattr1->attr_value.v.p_sub_attr) == NULL) ||
((p_repdesc = p_subattr2->p_next_attr) == NULL) ||
(SDP_DISC_ATTR_TYPE(p_repdesc->attr_len_type) != TEXT_STR_DESC_TYPE)) {
hh_cb.sdp_cback(HID_SDP_MANDATORY_MISSING, 0, NULL);
return;
}
p_nvi->dscp_info.dl_len = SDP_DISC_ATTR_LEN(p_repdesc->attr_len_type);
if (p_nvi->dscp_info.dl_len != 0)
p_nvi->dscp_info.dsc_list = (uint8_t*)&p_repdesc->attr_value;
if (((p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_HID_VIRTUAL_CABLE)) !=
NULL) &&
(p_attr->attr_value.v.u8)) {
attr_mask |= HID_VIRTUAL_CABLE;
}
if (((p_attr = SDP_FindAttributeInRec(
p_rec, ATTR_ID_HID_RECONNECT_INITIATE)) != NULL) &&
(p_attr->attr_value.v.u8)) {
attr_mask |= HID_RECONN_INIT;
}
if (((p_attr = SDP_FindAttributeInRec(
p_rec, ATTR_ID_HID_NORMALLY_CONNECTABLE)) != NULL) &&
(p_attr->attr_value.v.u8)) {
attr_mask |= HID_NORMALLY_CONNECTABLE;
}
if (((p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_HID_SDP_DISABLE)) !=
NULL) &&
(p_attr->attr_value.v.u8)) {
attr_mask |= HID_SDP_DISABLE;
}
if (((p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_HID_BATTERY_POWER)) !=
NULL) &&
(p_attr->attr_value.v.u8)) {
attr_mask |= HID_BATTERY_POWER;
}
if (((p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_HID_REMOTE_WAKE)) !=
NULL) &&
(p_attr->attr_value.v.u8)) {
attr_mask |= HID_REMOTE_WAKE;
}
hidh_get_str_attr(p_rec, ATTR_ID_SERVICE_NAME, HID_MAX_SVC_NAME_LEN,
p_nvi->svc_name);
hidh_get_str_attr(p_rec, ATTR_ID_SERVICE_DESCRIPTION, HID_MAX_SVC_DESCR_LEN,
p_nvi->svc_descr);
hidh_get_str_attr(p_rec, ATTR_ID_PROVIDER_NAME, HID_MAX_PROV_NAME_LEN,
p_nvi->prov_name);
if (((p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_HID_DEVICE_RELNUM)) !=
NULL)) {
p_nvi->rel_num = p_attr->attr_value.v.u16;
}
if (((p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_HID_COUNTRY_CODE)) !=
NULL)) {
p_nvi->ctry_code = p_attr->attr_value.v.u8;
}
if (((p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_HID_DEVICE_SUBCLASS)) !=
NULL)) {
p_nvi->sub_class = p_attr->attr_value.v.u8;
}
if (((p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_HID_PARSER_VERSION)) !=
NULL)) {
p_nvi->hpars_ver = p_attr->attr_value.v.u16;
}
if (((p_attr = SDP_FindAttributeInRec(
p_rec, ATTR_ID_HID_LINK_SUPERVISION_TO)) != NULL)) {
attr_mask |= HID_SUP_TOUT_AVLBL;
p_nvi->sup_timeout = p_attr->attr_value.v.u16;
}
if (((p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_HID_SSR_HOST_MAX_LAT)) !=
NULL)) {
attr_mask |= HID_SSR_MAX_LATENCY;
p_nvi->ssr_max_latency = p_attr->attr_value.v.u16;
} else
p_nvi->ssr_max_latency = HID_SSR_PARAM_INVALID;
if (((p_attr = SDP_FindAttributeInRec(
p_rec, ATTR_ID_HID_SSR_HOST_MIN_TOUT)) != NULL)) {
attr_mask |= HID_SSR_MIN_TOUT;
p_nvi->ssr_min_tout = p_attr->attr_value.v.u16;
} else
p_nvi->ssr_min_tout = HID_SSR_PARAM_INVALID;
hh_cb.sdp_rec.p_sdp_layer_rec = p_rec;
hh_cb.sdp_cback(SDP_SUCCESS, attr_mask, &hh_cb.sdp_rec);
}
/*******************************************************************************
*
* Function HID_HostInit
*
* Description This function initializes the control block and trace
* variable
*
* Returns void
*
******************************************************************************/
void HID_HostInit(void) {
uint8_t log_level = hh_cb.trace_level;
memset(&hh_cb, 0, sizeof(tHID_HOST_CTB));
hh_cb.trace_level = log_level;
}
/*******************************************************************************
*
* Function HID_HostSetTraceLevel
*
* Description This function sets the trace level for HID Host. If called
* with 0xFF, it simply reads the current trace level.
*
* Returns the new (current) trace level
*
******************************************************************************/
uint8_t HID_HostSetTraceLevel(uint8_t new_level) {
if (new_level != 0xFF) hh_cb.trace_level = new_level;
return (hh_cb.trace_level);
}
/*******************************************************************************
*
* Function HID_HostRegister
*
* Description This function registers HID-Host with lower layers
*
* Returns tHID_STATUS
*
******************************************************************************/
tHID_STATUS HID_HostRegister(tHID_HOST_DEV_CALLBACK* dev_cback) {
tHID_STATUS st;
if (hh_cb.reg_flag) return HID_ERR_ALREADY_REGISTERED;
if (dev_cback == NULL) return HID_ERR_INVALID_PARAM;
/* Register with L2CAP */
st = hidh_conn_reg();
if (st != HID_SUCCESS) {
return st;
}
hh_cb.callback = dev_cback;
hh_cb.reg_flag = true;
for (size_t i = 0; i < HID_HOST_MAX_DEVICES; i++) {
hh_cb.devices[i].conn.process_repage_timer =
alarm_new("hid_devices_conn.process_repage_timer");
}
return (HID_SUCCESS);
}
/*******************************************************************************
*
* Function HID_HostDeregister
*
* Description This function is called when the host is about power down.
*
* Returns tHID_STATUS
*
******************************************************************************/
tHID_STATUS HID_HostDeregister(void) {
uint8_t i;
if (!hh_cb.reg_flag) return (HID_ERR_NOT_REGISTERED);
for (i = 0; i < HID_HOST_MAX_DEVICES; i++) {
alarm_free(hh_cb.devices[i].conn.process_repage_timer);
HID_HostRemoveDev(i);
}
hidh_conn_dereg();
hh_cb.reg_flag = false;
return (HID_SUCCESS);
}
/*******************************************************************************
*
* Function HID_HostAddDev
*
* Description This is called so HID-host may manage this device.
*
* Returns tHID_STATUS
*
******************************************************************************/
tHID_STATUS HID_HostAddDev(const RawAddress& addr, uint16_t attr_mask,
uint8_t* handle) {
int i;
/* Find an entry for this device in hh_cb.devices array */
if (!hh_cb.reg_flag) return (HID_ERR_NOT_REGISTERED);
for (i = 0; i < HID_HOST_MAX_DEVICES; i++) {
if ((hh_cb.devices[i].in_use) && addr == hh_cb.devices[i].addr) break;
}
if (i == HID_HOST_MAX_DEVICES) {
for (i = 0; i < HID_HOST_MAX_DEVICES; i++) {
if (!hh_cb.devices[i].in_use) break;
}
}
if (i == HID_HOST_MAX_DEVICES) return HID_ERR_NO_RESOURCES;
if (!hh_cb.devices[i].in_use) {
hh_cb.devices[i].in_use = true;
hh_cb.devices[i].addr = addr;
hh_cb.devices[i].state = HID_DEV_NO_CONN;
hh_cb.devices[i].conn_tries = 0;
}
if (attr_mask != HID_ATTR_MASK_IGNORE) hh_cb.devices[i].attr_mask = attr_mask;
*handle = i;
return (HID_SUCCESS);
}
/*******************************************************************************
*
* Function HID_HostRemoveDev
*
* Description This removes the device from the list of devices that the
* host has to manage.
*
* Returns tHID_STATUS
*
******************************************************************************/
tHID_STATUS HID_HostRemoveDev(uint8_t dev_handle) {
if (!hh_cb.reg_flag) return (HID_ERR_NOT_REGISTERED);
if ((dev_handle >= HID_HOST_MAX_DEVICES) ||
(!hh_cb.devices[dev_handle].in_use))
return HID_ERR_INVALID_PARAM;
HID_HostCloseDev(dev_handle);
hh_cb.devices[dev_handle].in_use = false;
hh_cb.devices[dev_handle].conn.conn_state = HID_CONN_STATE_UNUSED;
hh_cb.devices[dev_handle].conn.ctrl_cid =
hh_cb.devices[dev_handle].conn.intr_cid = 0;
hh_cb.devices[dev_handle].attr_mask = 0;
return HID_SUCCESS;
}
/*******************************************************************************
*
* Function HID_HostOpenDev
*
* Description This function is called when the user wants to initiate a
* connection attempt to a device.
*
* Returns void
*
******************************************************************************/
tHID_STATUS HID_HostOpenDev(uint8_t dev_handle) {
if (!hh_cb.reg_flag) return (HID_ERR_NOT_REGISTERED);
if ((dev_handle >= HID_HOST_MAX_DEVICES) ||
(!hh_cb.devices[dev_handle].in_use))
return HID_ERR_INVALID_PARAM;
if (hh_cb.devices[dev_handle].state != HID_DEV_NO_CONN)
return HID_ERR_ALREADY_CONN;
hh_cb.devices[dev_handle].conn_tries = 1;
return hidh_conn_initiate(dev_handle);
}
/*******************************************************************************
*
* Function HID_HostWriteDev
*
* Description This function is called when the host has a report to send.
*
* report_id: is only used on GET_REPORT transaction if is
* specified. only valid when it is non-zero.
*
* Returns void
*
******************************************************************************/
tHID_STATUS HID_HostWriteDev(uint8_t dev_handle, uint8_t t_type, uint8_t param,
uint16_t data, uint8_t report_id, BT_HDR* pbuf) {
tHID_STATUS status = HID_SUCCESS;
if (!hh_cb.reg_flag) {
HIDH_TRACE_ERROR("HID_ERR_NOT_REGISTERED");
status = HID_ERR_NOT_REGISTERED;
}
if ((dev_handle >= HID_HOST_MAX_DEVICES) ||
(!hh_cb.devices[dev_handle].in_use)) {
HIDH_TRACE_ERROR("HID_ERR_INVALID_PARAM");
status = HID_ERR_INVALID_PARAM;
}
else if (hh_cb.devices[dev_handle].state != HID_DEV_CONNECTED) {
HIDH_TRACE_ERROR("HID_ERR_NO_CONNECTION dev_handle %d", dev_handle);
status = HID_ERR_NO_CONNECTION;
}
if (status != HID_SUCCESS)
osi_free(pbuf);
else
status =
hidh_conn_snd_data(dev_handle, t_type, param, data, report_id, pbuf);
return status;
}
/*******************************************************************************
*
* Function HID_HostCloseDev
*
* Description This function disconnects the device.
*
* Returns void
*
******************************************************************************/
tHID_STATUS HID_HostCloseDev(uint8_t dev_handle) {
if (!hh_cb.reg_flag) return (HID_ERR_NOT_REGISTERED);
if ((dev_handle >= HID_HOST_MAX_DEVICES) ||
(!hh_cb.devices[dev_handle].in_use))
return HID_ERR_INVALID_PARAM;
if (hh_cb.devices[dev_handle].state != HID_DEV_CONNECTED)
return HID_ERR_NO_CONNECTION;
alarm_cancel(hh_cb.devices[dev_handle].conn.process_repage_timer);
hh_cb.devices[dev_handle].conn_tries = HID_HOST_MAX_CONN_RETRY + 1;
return hidh_conn_disconnect(dev_handle);
}
tHID_STATUS HID_HostSetSecurityLevel(const char serv_name[], uint8_t sec_lvl) {
if (!BTM_SetSecurityLevel(false, serv_name, BTM_SEC_SERVICE_HIDH_SEC_CTRL,
sec_lvl, HID_PSM_CONTROL, BTM_SEC_PROTO_HID,
HID_SEC_CHN)) {
HIDH_TRACE_ERROR("Security Registration 1 failed");
return (HID_ERR_NO_RESOURCES);
}
if (!BTM_SetSecurityLevel(true, serv_name, BTM_SEC_SERVICE_HIDH_SEC_CTRL,
sec_lvl, HID_PSM_CONTROL, BTM_SEC_PROTO_HID,
HID_SEC_CHN)) {
HIDH_TRACE_ERROR("Security Registration 2 failed");
return (HID_ERR_NO_RESOURCES);
}
if (!BTM_SetSecurityLevel(false, serv_name, BTM_SEC_SERVICE_HIDH_NOSEC_CTRL,
BTM_SEC_NONE, HID_PSM_CONTROL, BTM_SEC_PROTO_HID,
HID_NOSEC_CHN)) {
HIDH_TRACE_ERROR("Security Registration 3 failed");
return (HID_ERR_NO_RESOURCES);
}
if (!BTM_SetSecurityLevel(true, serv_name, BTM_SEC_SERVICE_HIDH_NOSEC_CTRL,
BTM_SEC_NONE, HID_PSM_CONTROL, BTM_SEC_PROTO_HID,
HID_NOSEC_CHN)) {
HIDH_TRACE_ERROR("Security Registration 4 failed");
return (HID_ERR_NO_RESOURCES);
}
if (!BTM_SetSecurityLevel(true, serv_name, BTM_SEC_SERVICE_HIDH_INTR,
BTM_SEC_NONE, HID_PSM_INTERRUPT, BTM_SEC_PROTO_HID,
0)) {
HIDH_TRACE_ERROR("Security Registration 5 failed");
return (HID_ERR_NO_RESOURCES);
}
if (!BTM_SetSecurityLevel(false, serv_name, BTM_SEC_SERVICE_HIDH_INTR,
BTM_SEC_NONE, HID_PSM_INTERRUPT, BTM_SEC_PROTO_HID,
0)) {
HIDH_TRACE_ERROR("Security Registration 6 failed");
return (HID_ERR_NO_RESOURCES);
}
return (HID_SUCCESS);
}
/******************************************************************************
*
* Function hid_known_hid_device
*
* Description check if this device is of type HID Device
*
* Returns true if device is HID Device else false
*
******************************************************************************/
bool hid_known_hid_device(const RawAddress& bd_addr) {
uint8_t i;
tBTM_INQ_INFO* p_inq_info = BTM_InqDbRead(bd_addr);
if (!hh_cb.reg_flag) return false;
/* First check for class of device , if Inq DB has information about this
* device*/
if (p_inq_info != NULL) {
/* Check if remote major device class is of type BTM_COD_MAJOR_PERIPHERAL */
if ((p_inq_info->results.dev_class[1] & BTM_COD_MAJOR_CLASS_MASK) ==
BTM_COD_MAJOR_PERIPHERAL) {
HIDH_TRACE_DEBUG(
"hid_known_hid_device:dev found in InqDB & COD matches HID dev");
return true;
}
} else {
/* Look for this device in security device DB */
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev(bd_addr);
if ((p_dev_rec != NULL) &&
((p_dev_rec->dev_class[1] & BTM_COD_MAJOR_CLASS_MASK) ==
BTM_COD_MAJOR_PERIPHERAL)) {
HIDH_TRACE_DEBUG(
"hid_known_hid_device:dev found in SecDevDB & COD matches HID dev");
return true;
}
}
/* Find an entry for this device in hh_cb.devices array */
for (i = 0; i < HID_HOST_MAX_DEVICES; i++) {
if ((hh_cb.devices[i].in_use) && bd_addr == hh_cb.devices[i].addr)
return true;
}
/* Check if this device is marked as HID Device in IOP Dev */
HIDH_TRACE_DEBUG("hid_known_hid_device:remote is not HID device");
return false;
}