/****************************************************************************** * * Copyright (C) 2000-2012 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 functions that handle SCO connections. This includes * operations such as connect, disconnect, change supported packet types. * ******************************************************************************/ #include #include "bt_types.h" #include "bt_target.h" #include "gki.h" #include "bt_types.h" #include "hcimsgs.h" #include "btu.h" #include "btm_api.h" #include "btm_int.h" #include "hcidefs.h" #if BTM_SCO_INCLUDED == TRUE /********************************************************************************/ /* L O C A L D A T A D E F I N I T I O N S */ /********************************************************************************/ #define SCO_ST_UNUSED 0 #define SCO_ST_LISTENING 1 #define SCO_ST_W4_CONN_RSP 2 #define SCO_ST_CONNECTING 3 #define SCO_ST_CONNECTED 4 #define SCO_ST_DISCONNECTING 5 #define SCO_ST_PEND_UNPARK 6 #define SCO_ST_PEND_ROLECHANGE 7 /********************************************************************************/ /* L O C A L F U N C T I O N P R O T O T Y P E S */ /********************************************************************************/ static const tBTM_ESCO_PARAMS btm_esco_defaults = { BTM_64KBITS_RATE, /* TX Bandwidth (64 kbits/sec) */ BTM_64KBITS_RATE, /* RX Bandwidth (64 kbits/sec) */ 0x000a, /* 10 ms (HS/HF can use EV3, 2-EV3, 3-EV3) */ 0x0060, /* Inp Linear, Air CVSD, 2s Comp, 16bit */ (BTM_SCO_PKT_TYPES_MASK_HV1 + /* Packet Types */ BTM_SCO_PKT_TYPES_MASK_HV2 + BTM_SCO_PKT_TYPES_MASK_HV3 + BTM_SCO_PKT_TYPES_MASK_EV3 + BTM_SCO_PKT_TYPES_MASK_EV4 + BTM_SCO_PKT_TYPES_MASK_EV5), BTM_ESCO_RETRANS_POWER /* Retransmission Effort (Power) */ }; /******************************************************************************* ** ** Function btm_sco_flush_sco_data ** ** Description This function is called to flush the SCO data for this channel. ** ** Returns void ** *******************************************************************************/ void btm_sco_flush_sco_data(UINT16 sco_inx) { #if BTM_SCO_HCI_INCLUDED == TRUE #if (BTM_MAX_SCO_LINKS>0) tSCO_CONN *p ; BT_HDR *p_buf; if (sco_inx < BTM_MAX_SCO_LINKS) { p = &btm_cb.sco_cb.sco_db[sco_inx]; while (p->xmit_data_q.p_first) { if ((p_buf = (BT_HDR *)GKI_dequeue (&p->xmit_data_q)) != NULL) GKI_freebuf (p_buf); } } #endif #endif } /******************************************************************************* ** ** Function btm_sco_init ** ** Description This function is called at BTM startup to initialize ** ** Returns void ** *******************************************************************************/ void btm_sco_init (void) { #if 0 /* cleared in btm_init; put back in if called from anywhere else! */ memset (&btm_cb.sco_cb, 0, sizeof(tSCO_CB)); #endif /* Initialize nonzero defaults */ btm_cb.sco_cb.sco_disc_reason = BTM_INVALID_SCO_DISC_REASON; btm_cb.sco_cb.def_esco_parms = btm_esco_defaults; /* Initialize with defaults */ btm_cb.sco_cb.desired_sco_mode = BTM_DEFAULT_SCO_MODE; } /******************************************************************************* ** ** Function btm_esco_conn_rsp ** ** Description This function is called upon receipt of an (e)SCO connection ** request event (BTM_ESCO_CONN_REQ_EVT) to accept or reject ** the request. Parameters used to negotiate eSCO links. ** If p_parms is NULL, then default values are used. ** If the link type of the incoming request is SCO, then only ** the tx_bw, max_latency, content format, and packet_types are ** valid. The hci_status parameter should be ** ([0x0] to accept, [0x0d..0x0f] to reject) ** ** Returns void ** *******************************************************************************/ static void btm_esco_conn_rsp (UINT16 sco_inx, UINT8 hci_status, BD_ADDR bda, tBTM_ESCO_PARAMS *p_parms) { #if (BTM_MAX_SCO_LINKS>0) tSCO_CONN *p_sco = NULL; tBTM_ESCO_PARAMS *p_setup; UINT16 temp_pkt_types; if (sco_inx < BTM_MAX_SCO_LINKS) p_sco = &btm_cb.sco_cb.sco_db[sco_inx]; /* Reject the connect request if refused by caller or wrong state */ if (hci_status != HCI_SUCCESS || p_sco == NULL) { if (p_sco) { p_sco->state = (p_sco->state == SCO_ST_W4_CONN_RSP) ? SCO_ST_LISTENING : SCO_ST_UNUSED; } if (!btm_cb.sco_cb.esco_supported) { if (!btsnd_hcic_reject_conn (bda, hci_status)) { BTM_TRACE_ERROR0("Could not reject (e)SCO conn: No Buffer!!!"); } } else { if (!btsnd_hcic_reject_esco_conn (bda, hci_status)) { BTM_TRACE_ERROR0("Could not reject (e)SCO conn: No Buffer!!!"); } } } else /* Connection is being accepted */ { p_sco->state = SCO_ST_CONNECTING; if (btm_cb.devcb.local_version.hci_version >= HCI_PROTO_VERSION_1_2) { p_setup = &p_sco->esco.setup; /* If parameters not specified use the default */ if (p_parms) *p_setup = *p_parms; else /* Use the last setup passed thru BTM_SetEscoMode (or defaults) */ { *p_setup = btm_cb.sco_cb.def_esco_parms; } temp_pkt_types = (p_setup->packet_types & BTM_SCO_SUPPORTED_PKTS_MASK & btm_cb.btm_sco_pkt_types_supported); /* Make sure at least one eSCO packet type is sent, else might confuse peer */ /* Taking this out to confirm with BQB tests ** Real application would like to include this though, as many devices ** do not retry with SCO only if an eSCO connection fails. if (!(temp_pkt_types & BTM_ESCO_LINK_ONLY_MASK)) { temp_pkt_types |= BTM_SCO_PKT_TYPES_MASK_EV3; } */ /* If SCO request, remove eSCO packet types (conformance) */ if (p_sco->esco.data.link_type == BTM_LINK_TYPE_SCO) { temp_pkt_types &= BTM_SCO_LINK_ONLY_MASK; if (btm_cb.devcb.local_version.hci_version >= HCI_PROTO_VERSION_2_0) { temp_pkt_types |= BTM_SCO_EXCEPTION_PKTS_MASK; } } /* OR in any exception packet types if at least 2.0 version of spec */ else if (btm_cb.devcb.local_version.hci_version >= HCI_PROTO_VERSION_2_0) { temp_pkt_types |= ((p_setup->packet_types & BTM_SCO_EXCEPTION_PKTS_MASK) | (btm_cb.btm_sco_pkt_types_supported & BTM_SCO_EXCEPTION_PKTS_MASK)); } if (btsnd_hcic_accept_esco_conn (bda, p_setup->tx_bw, p_setup->rx_bw, p_setup->max_latency, p_setup->voice_contfmt, p_setup->retrans_effort, temp_pkt_types)) { p_setup->packet_types = temp_pkt_types; } else { BTM_TRACE_ERROR0("Could not accept SCO conn: No Buffer!!!"); } } else /* Controller is version 1.1 or earlier */ { btsnd_hcic_accept_conn (bda, 0); } } #endif } #if BTM_SCO_HCI_INCLUDED == TRUE /******************************************************************************* ** ** Function btm_sco_check_send_pkts ** ** Description This function is called to check if it can send packets ** to the Host Controller. ** ** Returns void ** *******************************************************************************/ void btm_sco_check_send_pkts (UINT16 sco_inx) { BT_HDR *p_buf; tSCO_CB *p_cb = &btm_cb.sco_cb; tSCO_CONN *p_ccb = &p_cb->sco_db[sco_inx]; /* If there is data to send, send it now */ while (p_ccb->xmit_data_q.p_first != NULL) { p_buf = NULL; #if BTM_SCO_HCI_DEBUG BTM_TRACE_DEBUG1 ("btm: [%d] buf in xmit_data_q", p_ccb->xmit_data_q.count ); #endif p_buf = (BT_HDR *)GKI_dequeue (&p_ccb->xmit_data_q); HCI_SCO_DATA_TO_LOWER (p_buf); } } #endif /* BTM_SCO_HCI_INCLUDED == TRUE */ /******************************************************************************* ** ** Function btm_route_sco_data ** ** Description Route received SCO data. ** ** Returns void ** *******************************************************************************/ void btm_route_sco_data(BT_HDR *p_msg) { #if BTM_SCO_HCI_INCLUDED == TRUE UINT16 sco_inx, handle; UINT8 *p = (UINT8 *)(p_msg + 1) + p_msg->offset; UINT8 pkt_size = 0; UINT8 pkt_status = 0; /* Extract Packet_Status_Flag and handle */ STREAM_TO_UINT16 (handle, p); pkt_status = HCID_GET_EVENT(handle); handle = HCID_GET_HANDLE (handle); STREAM_TO_UINT8 (pkt_size, p); if ((sco_inx = btm_find_scb_by_handle(handle)) != BTM_MAX_SCO_LINKS ) { /* send data callback */ if (!btm_cb.sco_cb.p_data_cb ) /* if no data callback registered, just free the buffer */ GKI_freebuf (p_msg); else { (*btm_cb.sco_cb.p_data_cb)(sco_inx, p_msg, (tBTM_SCO_DATA_FLAG) pkt_status); } } else /* no mapping handle SCO connection is active, free the buffer */ { GKI_freebuf (p_msg); } #else GKI_freebuf(p_msg); #endif } /******************************************************************************* ** ** Function BTM_WriteScoData ** ** Description This function write SCO data to a specified instance. The data ** to be written p_buf needs to carry an offset of ** HCI_SCO_PREAMBLE_SIZE bytes, and the data length can not ** exceed BTM_SCO_DATA_SIZE_MAX bytes, whose default value is set ** to 60 and is configurable. Data longer than the maximum bytes ** will be truncated. ** ** Returns BTM_SUCCESS: data write is successful ** BTM_ILLEGAL_VALUE: SCO data contains illegal offset value. ** BTM_SCO_BAD_LENGTH: SCO data length exceeds the max SCO packet ** size. ** BTM_NO_RESOURCES: no resources. ** BTM_UNKNOWN_ADDR: unknown SCO connection handle, or SCO is not ** routed via HCI. ** ** *******************************************************************************/ tBTM_STATUS BTM_WriteScoData (UINT16 sco_inx, BT_HDR *p_buf) { #if (BTM_SCO_HCI_INCLUDED == TRUE) && (BTM_MAX_SCO_LINKS>0) tSCO_CONN *p_ccb = &btm_cb.sco_cb.sco_db[sco_inx]; UINT8 *p; tBTM_STATUS status = BTM_SUCCESS; if (sco_inx < BTM_MAX_SCO_LINKS && btm_cb.sco_cb.p_data_cb && p_ccb->state == SCO_ST_CONNECTED) { /* Ensure we have enough space in the buffer for the SCO and HCI headers */ if (p_buf->offset < HCI_SCO_PREAMBLE_SIZE) { BTM_TRACE_ERROR1 ("BTM SCO - cannot send buffer, offset: %d", p_buf->offset); GKI_freebuf (p_buf); status = BTM_ILLEGAL_VALUE; } else /* write HCI header */ { /* Step back 3 bytes to add the headers */ p_buf->offset -= HCI_SCO_PREAMBLE_SIZE; /* Set the pointer to the beginning of the data */ p = (UINT8 *)(p_buf + 1) + p_buf->offset; /* add HCI handle */ UINT16_TO_STREAM (p, p_ccb->hci_handle); /* only sent the first BTM_SCO_DATA_SIZE_MAX bytes data if more than max, and set warning status */ if (p_buf->len > BTM_SCO_DATA_SIZE_MAX) { p_buf->len = BTM_SCO_DATA_SIZE_MAX; status = BTM_SCO_BAD_LENGTH; } UINT8_TO_STREAM (p, (UINT8)p_buf->len); p_buf->len += HCI_SCO_PREAMBLE_SIZE; GKI_enqueue (&p_ccb->xmit_data_q, p_buf); btm_sco_check_send_pkts (sco_inx); } } else { GKI_freebuf(p_buf); BTM_TRACE_WARNING2 ("BTM_WriteScoData, invalid sco index: %d at state [%d]", sco_inx, btm_cb.sco_cb.sco_db[sco_inx].state); status = BTM_UNKNOWN_ADDR; } return (status); #else return (BTM_NO_RESOURCES); #endif } #if (BTM_MAX_SCO_LINKS>0) /******************************************************************************* ** ** Function btm_send_connect_request ** ** Description This function is called to respond to SCO connect indications ** ** Returns void ** *******************************************************************************/ static tBTM_STATUS btm_send_connect_request(UINT16 acl_handle, tBTM_ESCO_PARAMS *p_setup) { UINT16 temp_pkt_types; UINT8 xx; tACL_CONN *p_acl; /* Send connect request depending on version of spec */ if (!btm_cb.sco_cb.esco_supported) { if (!btsnd_hcic_add_SCO_conn (acl_handle, BTM_ESCO_2_SCO(p_setup->packet_types))) return (BTM_NO_RESOURCES); } else { temp_pkt_types = (p_setup->packet_types & BTM_SCO_SUPPORTED_PKTS_MASK & btm_cb.btm_sco_pkt_types_supported); /* OR in any exception packet types if at least 2.0 version of spec */ if (btm_cb.devcb.local_version.hci_version >= HCI_PROTO_VERSION_2_0) { temp_pkt_types |= ((p_setup->packet_types & BTM_SCO_EXCEPTION_PKTS_MASK) | (btm_cb.btm_sco_pkt_types_supported & BTM_SCO_EXCEPTION_PKTS_MASK)); } /* Finally, remove EDR eSCO if the remote device doesn't support it */ /* UPF25: Only SCO was brought up in this case */ btm_handle_to_acl_index(acl_handle); if ((xx = btm_handle_to_acl_index(acl_handle)) < MAX_L2CAP_LINKS) { p_acl = &btm_cb.acl_db[xx]; if (!HCI_EDR_ESCO_2MPS_SUPPORTED(p_acl->features)) { BTM_TRACE_WARNING0("BTM Remote does not support 2-EDR eSCO"); temp_pkt_types |= (HCI_ESCO_PKT_TYPES_MASK_NO_2_EV3 | HCI_ESCO_PKT_TYPES_MASK_NO_2_EV5); } if (!HCI_EDR_ESCO_3MPS_SUPPORTED(p_acl->features)) { BTM_TRACE_WARNING0("BTM Remote does not support 3-EDR eSCO"); temp_pkt_types |= (HCI_ESCO_PKT_TYPES_MASK_NO_3_EV3 | HCI_ESCO_PKT_TYPES_MASK_NO_3_EV5); } } BTM_TRACE_API6(" txbw 0x%x, rxbw 0x%x, lat 0x%x, voice 0x%x, retrans 0x%02x, pkt 0x%04x", p_setup->tx_bw, p_setup->rx_bw, p_setup->max_latency, p_setup->voice_contfmt, p_setup->retrans_effort, temp_pkt_types); if (!btsnd_hcic_setup_esco_conn(acl_handle, p_setup->tx_bw, p_setup->rx_bw, p_setup->max_latency, p_setup->voice_contfmt, p_setup->retrans_effort, temp_pkt_types)) return (BTM_NO_RESOURCES); else p_setup->packet_types = temp_pkt_types; } return (BTM_CMD_STARTED); } #endif /******************************************************************************* ** ** Function btm_set_sco_ind_cback ** ** Description This function is called to register for TCS SCO connect ** indications. ** ** Returns void ** *******************************************************************************/ void btm_set_sco_ind_cback( tBTM_SCO_IND_CBACK *sco_ind_cb ) { btm_cb.sco_cb.app_sco_ind_cb = sco_ind_cb; } /******************************************************************************* ** ** Function btm_accept_sco_link ** ** Description This function is called to respond to TCS SCO connect ** indications ** ** Returns void ** *******************************************************************************/ void btm_accept_sco_link(UINT16 sco_inx, tBTM_ESCO_PARAMS *p_setup, tBTM_SCO_CB *p_conn_cb, tBTM_SCO_CB *p_disc_cb) { #if (BTM_MAX_SCO_LINKS>0) tSCO_CONN *p_sco; if (sco_inx >= BTM_MAX_SCO_LINKS) { BTM_TRACE_ERROR1("btm_accept_sco_link: Invalid sco_inx(%d)", sco_inx); return; } /* Link role is ignored in for this message */ p_sco = &btm_cb.sco_cb.sco_db[sco_inx]; p_sco->p_conn_cb = p_conn_cb; p_sco->p_disc_cb = p_disc_cb; p_sco->esco.data.link_type = BTM_LINK_TYPE_ESCO; /* Accept with all supported types */ BTM_TRACE_DEBUG1("TCS accept SCO: Packet Types 0x%04x", p_setup->packet_types); btm_esco_conn_rsp(sco_inx, HCI_SUCCESS, p_sco->esco.data.bd_addr, p_setup); #else btm_reject_sco_link(sco_inx); #endif } /******************************************************************************* ** ** Function btm_reject_sco_link ** ** Description This function is called to respond to SCO connect indications ** ** Returns void ** *******************************************************************************/ void btm_reject_sco_link( UINT16 sco_inx ) { btm_esco_conn_rsp(sco_inx, HCI_ERR_HOST_REJECT_RESOURCES, btm_cb.sco_cb.sco_db[sco_inx].esco.data.bd_addr, NULL); } /******************************************************************************* ** ** Function BTM_CreateSco ** ** Description This function is called to create an SCO connection. If the ** "is_orig" flag is TRUE, the connection will be originated, ** otherwise BTM will wait for the other side to connect. ** ** NOTE: If BTM_IGNORE_SCO_PKT_TYPE is passed in the pkt_types ** parameter the default packet types is used. ** ** Returns BTM_UNKNOWN_ADDR if the ACL connection is not up ** BTM_BUSY if another SCO being set up to ** the same BD address ** BTM_NO_RESOURCES if the max SCO limit has been reached ** BTM_CMD_STARTED if the connection establishment is started. ** In this case, "*p_sco_inx" is filled in ** with the sco index used for the connection. ** *******************************************************************************/ tBTM_STATUS BTM_CreateSco (BD_ADDR remote_bda, BOOLEAN is_orig, UINT16 pkt_types, UINT16 *p_sco_inx, tBTM_SCO_CB *p_conn_cb, tBTM_SCO_CB *p_disc_cb) { #if (BTM_MAX_SCO_LINKS > 0) tBTM_ESCO_PARAMS *p_setup; tSCO_CONN *p = &btm_cb.sco_cb.sco_db[0]; UINT16 xx; UINT16 acl_handle = 0; UINT16 temp_pkt_types; tACL_CONN *p_acl; #if (BTM_PWR_MGR_INCLUDED == TRUE) && (BTM_SCO_WAKE_PARKED_LINK == TRUE) tBTM_PM_MODE md; tBTM_PM_PWR_MD pm; #else UINT8 mode; #endif *p_sco_inx = BTM_INVALID_SCO_INDEX; /* If originating, ensure that there is an ACL connection to the BD Address */ if (is_orig) { if ((!remote_bda) || ((acl_handle = BTM_GetHCIConnHandle (remote_bda)) == 0xFFFF)) return (BTM_UNKNOWN_ADDR); } if (remote_bda) { /* If any SCO is being established to the remote BD address, refuse this */ for (xx = 0; xx < BTM_MAX_SCO_LINKS; xx++, p++) { if (((p->state == SCO_ST_CONNECTING) || (p->state == SCO_ST_LISTENING) || (p->state == SCO_ST_PEND_UNPARK)) && (!memcmp (p->esco.data.bd_addr, remote_bda, BD_ADDR_LEN))) { return (BTM_BUSY); } } } else { /* Support only 1 wildcard BD address at a time */ for (xx = 0; xx < BTM_MAX_SCO_LINKS; xx++, p++) { if ((p->state == SCO_ST_LISTENING) && (!p->rem_bd_known)) return (BTM_BUSY); } } /* Now, try to find an unused control block, and kick off the SCO establishment */ for (xx = 0, p = &btm_cb.sco_cb.sco_db[0]; xx < BTM_MAX_SCO_LINKS; xx++, p++) { if (p->state == SCO_ST_UNUSED) { if (remote_bda) { if (is_orig) { /* can not create SCO link if in park mode */ #if (BTM_PWR_MGR_INCLUDED == TRUE) && (BTM_SCO_WAKE_PARKED_LINK == TRUE) if(BTM_ReadPowerMode(remote_bda, &md) == BTM_SUCCESS) { if (md == BTM_PM_MD_PARK || md == BTM_PM_MD_SNIFF) { /* Coverity: FALSE-POSITIVE error from Coverity tool. Please do NOT remove following comment. */ /* coverity[uninit_use_in_call] False-positive: setting the mode to BTM_PM_MD_ACTIVE only uses settings.mode the other data members of tBTM_PM_PWR_MD are ignored */ pm.mode = BTM_PM_MD_ACTIVE; BTM_SetPowerMode(BTM_PM_SET_ONLY_ID, remote_bda, &pm); p->state = SCO_ST_PEND_UNPARK; } } #elif BTM_PWR_MGR_INCLUDED == TRUE if( (BTM_ReadPowerMode(remote_bda, &mode) == BTM_SUCCESS) && (mode == BTM_PM_MD_PARK) ) return (BTM_WRONG_MODE); #else if( (BTM_ReadAclMode(remote_bda, &mode) == BTM_SUCCESS) && (mode == BTM_ACL_MODE_PARK) ) return (BTM_WRONG_MODE); #endif } memcpy (p->esco.data.bd_addr, remote_bda, BD_ADDR_LEN); p->rem_bd_known = TRUE; } else p->rem_bd_known = FALSE; /* Link role is ignored in for this message */ if (pkt_types == BTM_IGNORE_SCO_PKT_TYPE) pkt_types = btm_cb.sco_cb.def_esco_parms.packet_types; p_setup = &p->esco.setup; *p_setup = btm_cb.sco_cb.def_esco_parms; p_setup->packet_types = (btm_cb.sco_cb.desired_sco_mode == BTM_LINK_TYPE_SCO) ? (pkt_types & BTM_SCO_LINK_ONLY_MASK) : pkt_types; temp_pkt_types = (p_setup->packet_types & BTM_SCO_SUPPORTED_PKTS_MASK & btm_cb.btm_sco_pkt_types_supported); /* OR in any exception packet types if at least 2.0 version of spec */ if (btm_cb.devcb.local_version.hci_version >= HCI_PROTO_VERSION_2_0) { if (btm_cb.sco_cb.desired_sco_mode == HCI_LINK_TYPE_ESCO) { temp_pkt_types |= ((p_setup->packet_types & BTM_SCO_EXCEPTION_PKTS_MASK) | (btm_cb.btm_sco_pkt_types_supported & BTM_SCO_EXCEPTION_PKTS_MASK)); } else /* Only using SCO packet types; turn off EDR also */ { temp_pkt_types |= BTM_SCO_EXCEPTION_PKTS_MASK; } } p_setup->packet_types = temp_pkt_types; p->p_conn_cb = p_conn_cb; p->p_disc_cb = p_disc_cb; p->hci_handle = BTM_INVALID_HCI_HANDLE; p->is_orig = is_orig; if( p->state != SCO_ST_PEND_UNPARK ) { if (is_orig) { /* If role change is in progress, do not proceed with SCO setup * Wait till role change is complete */ p_acl = btm_bda_to_acl(remote_bda); if (p_acl && p_acl->switch_role_state != BTM_ACL_SWKEY_STATE_IDLE) { BTM_TRACE_API1("Role Change is in progress for ACL handle 0x%04x",acl_handle); p->state = SCO_ST_PEND_ROLECHANGE; } } } if( p->state != SCO_ST_PEND_UNPARK && p->state != SCO_ST_PEND_ROLECHANGE ) { if (is_orig) { BTM_TRACE_API2("BTM_CreateSco -> (e)SCO Link for ACL handle 0x%04x, Desired Type %d", acl_handle, btm_cb.sco_cb.desired_sco_mode); if ((btm_send_connect_request(acl_handle, p_setup)) != BTM_CMD_STARTED) return (BTM_NO_RESOURCES); p->state = SCO_ST_CONNECTING; } else p->state = SCO_ST_LISTENING; } *p_sco_inx = xx; return (BTM_CMD_STARTED); } } #endif /* If here, all SCO blocks in use */ return (BTM_NO_RESOURCES); } #if (BTM_PWR_MGR_INCLUDED == TRUE) && (BTM_SCO_WAKE_PARKED_LINK == TRUE) /******************************************************************************* ** ** Function btm_sco_chk_pend_unpark ** ** Description This function is called by BTIF when there is a mode change ** event to see if there are SCO commands waiting for the unpark. ** ** Returns void ** *******************************************************************************/ void btm_sco_chk_pend_unpark (UINT8 hci_status, UINT16 hci_handle) { #if (BTM_MAX_SCO_LINKS>0) UINT16 xx; UINT16 acl_handle; tSCO_CONN *p = &btm_cb.sco_cb.sco_db[0]; for (xx = 0; xx < BTM_MAX_SCO_LINKS; xx++, p++) { if ((p->state == SCO_ST_PEND_UNPARK) && ((acl_handle = BTM_GetHCIConnHandle (p->esco.data.bd_addr)) == hci_handle)) { BTM_TRACE_API3("btm_sco_chk_pend_unpark -> (e)SCO Link for ACL handle 0x%04x, Desired Type %d, hci_status 0x%02x", acl_handle, btm_cb.sco_cb.desired_sco_mode, hci_status); if ((btm_send_connect_request(acl_handle, &p->esco.setup)) == BTM_CMD_STARTED) p->state = SCO_ST_CONNECTING; } } #endif } #endif /******************************************************************************* ** ** Function btm_sco_chk_pend_rolechange ** ** Description This function is called by BTIF when there is a role change ** event to see if there are SCO commands waiting for the role change. ** ** Returns void ** *******************************************************************************/ void btm_sco_chk_pend_rolechange (UINT16 hci_handle) { #if (BTM_MAX_SCO_LINKS>0) UINT16 xx; UINT16 acl_handle; tSCO_CONN *p = &btm_cb.sco_cb.sco_db[0]; for (xx = 0; xx < BTM_MAX_SCO_LINKS; xx++, p++) { if ((p->state == SCO_ST_PEND_ROLECHANGE) && ((acl_handle = BTM_GetHCIConnHandle (p->esco.data.bd_addr)) == hci_handle)) { BTM_TRACE_API1("btm_sco_chk_pend_rolechange -> (e)SCO Link for ACL handle 0x%04x", acl_handle); if ((btm_send_connect_request(acl_handle, &p->esco.setup)) == BTM_CMD_STARTED) p->state = SCO_ST_CONNECTING; } } #endif } /******************************************************************************* ** ** Function btm_sco_conn_req ** ** Description This function is called by BTIF when an SCO connection ** request is received from a remote. ** ** Returns void ** *******************************************************************************/ void btm_sco_conn_req (BD_ADDR bda, DEV_CLASS dev_class, UINT8 link_type) { #if (BTM_MAX_SCO_LINKS>0) tSCO_CB *p_sco = &btm_cb.sco_cb; tSCO_CONN *p = &p_sco->sco_db[0]; UINT16 xx; tBTM_ESCO_CONN_REQ_EVT_DATA evt_data; for (xx = 0; xx < BTM_MAX_SCO_LINKS; xx++, p++) { /* * If the sco state is in the SCO_ST_CONNECTING state, we still need * to return accept sco to avoid race conditon for sco creation */ if (((p->state == SCO_ST_LISTENING && p->rem_bd_known) || p->state == SCO_ST_CONNECTING) && (!memcmp (p->esco.data.bd_addr, bda, BD_ADDR_LEN))) { /* If this guy was a wildcard, he is not one any more */ p->rem_bd_known = TRUE; p->esco.data.link_type = link_type; p->state = SCO_ST_W4_CONN_RSP; memcpy (p->esco.data.bd_addr, bda, BD_ADDR_LEN); /* If no callback, auto-accept the connection if packet types match */ if (!p->esco.p_esco_cback) { /* If requesting eSCO reject if default parameters are SCO only */ if ((link_type == BTM_LINK_TYPE_ESCO && !(p_sco->def_esco_parms.packet_types & BTM_ESCO_LINK_ONLY_MASK) && ((p_sco->def_esco_parms.packet_types & BTM_SCO_EXCEPTION_PKTS_MASK) == BTM_SCO_EXCEPTION_PKTS_MASK)) /* Reject request if SCO is desired but no SCO packets delected */ || (link_type == BTM_LINK_TYPE_SCO && !(p_sco->def_esco_parms.packet_types & BTM_SCO_LINK_ONLY_MASK))) { btm_esco_conn_rsp(xx, HCI_ERR_HOST_REJECT_RESOURCES, bda, NULL); } else /* Accept the request */ { btm_esco_conn_rsp(xx, HCI_SUCCESS, bda, NULL); } } else /* Notify upper layer of connect indication */ { memcpy(evt_data.bd_addr, bda, BD_ADDR_LEN); memcpy(evt_data.dev_class, dev_class, DEV_CLASS_LEN); evt_data.link_type = link_type; evt_data.sco_inx = xx; p->esco.p_esco_cback(BTM_ESCO_CONN_REQ_EVT, (tBTM_ESCO_EVT_DATA *)&evt_data); } return; } } /* TCS usage */ if (btm_cb.sco_cb.app_sco_ind_cb) { /* Now, try to find an unused control block */ for (xx = 0, p = &btm_cb.sco_cb.sco_db[0]; xx < BTM_MAX_SCO_LINKS; xx++, p++) { if (p->state == SCO_ST_UNUSED) { p->is_orig = FALSE; p->state = SCO_ST_LISTENING; p->esco.data.link_type = link_type; memcpy (p->esco.data.bd_addr, bda, BD_ADDR_LEN); p->rem_bd_known = TRUE; break; } } if( xx < BTM_MAX_SCO_LINKS) { btm_cb.sco_cb.app_sco_ind_cb(xx); return; } } #endif /* If here, no one wants the SCO connection. Reject it */ BTM_TRACE_WARNING0("btm_sco_conn_req: No one wants this SCO connection; rejecting it"); btm_esco_conn_rsp(BTM_MAX_SCO_LINKS, HCI_ERR_HOST_REJECT_RESOURCES, bda, NULL); } /******************************************************************************* ** ** Function btm_sco_connected ** ** Description This function is called by BTIF when an (e)SCO connection ** is connected. ** ** Returns void ** *******************************************************************************/ void btm_sco_connected (UINT8 hci_status, BD_ADDR bda, UINT16 hci_handle, tBTM_ESCO_DATA *p_esco_data) { #if (BTM_MAX_SCO_LINKS>0) tSCO_CONN *p = &btm_cb.sco_cb.sco_db[0]; UINT16 xx; BOOLEAN spt = FALSE; tBTM_CHG_ESCO_PARAMS parms; #endif btm_cb.sco_cb.sco_disc_reason = hci_status; #if (BTM_MAX_SCO_LINKS>0) for (xx = 0; xx < BTM_MAX_SCO_LINKS; xx++, p++) { if (((p->state == SCO_ST_CONNECTING) || (p->state == SCO_ST_LISTENING) || (p->state == SCO_ST_W4_CONN_RSP)) && (p->rem_bd_known) && (!bda || !memcmp (p->esco.data.bd_addr, bda, BD_ADDR_LEN))) { if (hci_status != HCI_SUCCESS) { /* Report the error if originator, otherwise remain in Listen mode */ if (p->is_orig) { /* If role switch is pending, we need try again after role switch is complete */ if(hci_status == HCI_ERR_ROLE_SWITCH_PENDING) { BTM_TRACE_API1("Role Change pending for HCI handle 0x%04x",hci_handle); p->state = SCO_ST_PEND_ROLECHANGE; } /* avoid calling disconnect callback because of sco creation race */ else if (hci_status != HCI_ERR_LMP_ERR_TRANS_COLLISION) { p->state = SCO_ST_UNUSED; (*p->p_disc_cb)(xx); } } else { /* Notify the upper layer that incoming sco connection has failed. */ if (p->state == SCO_ST_CONNECTING) { p->state = SCO_ST_UNUSED; (*p->p_disc_cb)(xx); } else p->state = SCO_ST_LISTENING; } return; } if (p->state == SCO_ST_LISTENING) spt = TRUE; p->state = SCO_ST_CONNECTED; p->hci_handle = hci_handle; if (!btm_cb.sco_cb.esco_supported) { p->esco.data.link_type = BTM_LINK_TYPE_SCO; if (spt) { parms.packet_types = p->esco.setup.packet_types; /* Keep the other parameters the same for SCO */ parms.max_latency = p->esco.setup.max_latency; parms.retrans_effort = p->esco.setup.retrans_effort; BTM_ChangeEScoLinkParms(xx, &parms); } } else { if (p_esco_data) p->esco.data = *p_esco_data; } (*p->p_conn_cb)(xx); return; } } #endif } /******************************************************************************* ** ** Function btm_find_scb_by_handle ** ** Description Look through all active SCO connection for a match based on the ** HCI handle. ** ** Returns index to matched SCO connection CB, or BTM_MAX_SCO_LINKS if ** no match. ** *******************************************************************************/ UINT16 btm_find_scb_by_handle (UINT16 handle) { int xx; tSCO_CONN *p = &btm_cb.sco_cb.sco_db[0]; for (xx = 0; xx < BTM_MAX_SCO_LINKS; xx++, p++) { if ((p->state == SCO_ST_CONNECTED) && (p->hci_handle == handle)) { return (xx); } } /* If here, no match found */ return (xx); } /******************************************************************************* ** ** Function BTM_RemoveSco ** ** Description This function is called to remove a specific SCO connection. ** ** Returns status of the operation ** *******************************************************************************/ tBTM_STATUS BTM_RemoveSco (UINT16 sco_inx) { #if (BTM_MAX_SCO_LINKS>0) tSCO_CONN *p = &btm_cb.sco_cb.sco_db[sco_inx]; UINT16 tempstate; /* Validity check */ if ((sco_inx >= BTM_MAX_SCO_LINKS) || (p->state == SCO_ST_UNUSED)) return (BTM_UNKNOWN_ADDR); /* If no HCI handle, simply drop the connection and return */ if (p->hci_handle == BTM_INVALID_HCI_HANDLE || p->state == SCO_ST_PEND_UNPARK) { p->hci_handle = BTM_INVALID_HCI_HANDLE; p->state = SCO_ST_UNUSED; p->esco.p_esco_cback = NULL; /* Deregister the eSCO event callback */ return (BTM_SUCCESS); } tempstate = p->state; p->state = SCO_ST_DISCONNECTING; if (!btsnd_hcic_disconnect (p->hci_handle, HCI_ERR_PEER_USER)) { p->state = tempstate; return (BTM_NO_RESOURCES); } return (BTM_CMD_STARTED); #else return (BTM_NO_RESOURCES); #endif } /******************************************************************************* ** ** Function btm_remove_sco_links ** ** Description This function is called to remove all sco links for an ACL link. ** ** Returns void ** *******************************************************************************/ void btm_remove_sco_links (BD_ADDR bda) { #if (BTM_MAX_SCO_LINKS>0) tSCO_CONN *p = &btm_cb.sco_cb.sco_db[0]; UINT16 xx; for (xx = 0; xx < BTM_MAX_SCO_LINKS; xx++, p++) { if (p->rem_bd_known && (!memcmp (p->esco.data.bd_addr, bda, BD_ADDR_LEN))) { BTM_RemoveSco(xx); } } #endif } /******************************************************************************* ** ** Function btm_sco_removed ** ** Description This function is called by BTIF when an SCO connection ** is removed. ** ** Returns void ** *******************************************************************************/ void btm_sco_removed (UINT16 hci_handle, UINT8 reason) { #if (BTM_MAX_SCO_LINKS>0) tSCO_CONN *p = &btm_cb.sco_cb.sco_db[0]; UINT16 xx; #endif btm_cb.sco_cb.sco_disc_reason = reason; #if (BTM_MAX_SCO_LINKS>0) p = &btm_cb.sco_cb.sco_db[0]; for (xx = 0; xx < BTM_MAX_SCO_LINKS; xx++, p++) { if ((p->state != SCO_ST_UNUSED) && (p->state != SCO_ST_LISTENING) && (p->hci_handle == hci_handle)) { btm_sco_flush_sco_data(xx); p->state = SCO_ST_UNUSED; p->hci_handle = BTM_INVALID_HCI_HANDLE; p->rem_bd_known = FALSE; p->esco.p_esco_cback = NULL; /* Deregister eSCO callback */ (*p->p_disc_cb)(xx); return; } } #endif } /******************************************************************************* ** ** Function btm_sco_acl_removed ** ** Description This function is called when an ACL connection is ** removed. If the BD address is NULL, it is assumed that ** the local device is down, and all SCO links are removed. ** If a specific BD address is passed, only SCO connections ** to that BD address are removed. ** ** Returns void ** *******************************************************************************/ void btm_sco_acl_removed (BD_ADDR bda) { #if (BTM_MAX_SCO_LINKS>0) tSCO_CONN *p = &btm_cb.sco_cb.sco_db[0]; UINT16 xx; for (xx = 0; xx < BTM_MAX_SCO_LINKS; xx++, p++) { if (p->state != SCO_ST_UNUSED) { if ((!bda) || (!memcmp (p->esco.data.bd_addr, bda, BD_ADDR_LEN) && p->rem_bd_known)) { btm_sco_flush_sco_data(xx); p->state = SCO_ST_UNUSED; p->esco.p_esco_cback = NULL; /* Deregister eSCO callback */ (*p->p_disc_cb)(xx); } } } #endif } /******************************************************************************* ** ** Function BTM_SetScoPacketTypes ** ** Description This function is called to set the packet types used for ** a specific SCO connection, ** ** Parameters pkt_types - One or more of the following ** BTM_SCO_PKT_TYPES_MASK_HV1 ** BTM_SCO_PKT_TYPES_MASK_HV2 ** BTM_SCO_PKT_TYPES_MASK_HV3 ** BTM_SCO_PKT_TYPES_MASK_EV3 ** BTM_SCO_PKT_TYPES_MASK_EV4 ** BTM_SCO_PKT_TYPES_MASK_EV5 ** BTM_SCO_PKT_TYPES_MASK_NO_2_EV3 ** BTM_SCO_PKT_TYPES_MASK_NO_3_EV3 ** BTM_SCO_PKT_TYPES_MASK_NO_2_EV5 ** BTM_SCO_PKT_TYPES_MASK_NO_3_EV5 ** ** BTM_SCO_LINK_ALL_MASK - enables all supported types ** ** Returns status of the operation ** *******************************************************************************/ tBTM_STATUS BTM_SetScoPacketTypes (UINT16 sco_inx, UINT16 pkt_types) { #if (BTM_MAX_SCO_LINKS>0) tBTM_CHG_ESCO_PARAMS parms; tSCO_CONN *p; /* Validity check */ if (sco_inx >= BTM_MAX_SCO_LINKS) return (BTM_UNKNOWN_ADDR); p = &btm_cb.sco_cb.sco_db[sco_inx]; parms.packet_types = pkt_types; /* Keep the other parameters the same for SCO */ parms.max_latency = p->esco.setup.max_latency; parms.retrans_effort = p->esco.setup.retrans_effort; return (BTM_ChangeEScoLinkParms(sco_inx, &parms)); #else return (BTM_UNKNOWN_ADDR); #endif } /******************************************************************************* ** ** Function BTM_ReadScoPacketTypes ** ** Description This function is read the packet types used for a specific ** SCO connection. ** ** Returns Packet types supported for the connection ** One or more of the following (bitmask): ** BTM_SCO_PKT_TYPES_MASK_HV1 ** BTM_SCO_PKT_TYPES_MASK_HV2 ** BTM_SCO_PKT_TYPES_MASK_HV3 ** BTM_SCO_PKT_TYPES_MASK_EV3 ** BTM_SCO_PKT_TYPES_MASK_EV4 ** BTM_SCO_PKT_TYPES_MASK_EV5 ** BTM_SCO_PKT_TYPES_MASK_NO_2_EV3 ** BTM_SCO_PKT_TYPES_MASK_NO_3_EV3 ** BTM_SCO_PKT_TYPES_MASK_NO_2_EV5 ** BTM_SCO_PKT_TYPES_MASK_NO_3_EV5 ** *******************************************************************************/ UINT16 BTM_ReadScoPacketTypes (UINT16 sco_inx) { #if (BTM_MAX_SCO_LINKS>0) tSCO_CONN *p = &btm_cb.sco_cb.sco_db[sco_inx]; /* Validity check */ if ((sco_inx < BTM_MAX_SCO_LINKS) && (p->state == SCO_ST_CONNECTED)) return (p->esco.setup.packet_types); else return (0); #else return (0); #endif } /******************************************************************************* ** ** Function BTM_ReadScoDiscReason ** ** Description This function is returns the reason why an (e)SCO connection ** has been removed. It contains the value until read, or until ** another (e)SCO connection has disconnected. ** ** Returns HCI reason or BTM_INVALID_SCO_DISC_REASON if not set. ** *******************************************************************************/ UINT16 BTM_ReadScoDiscReason (void) { UINT16 res = btm_cb.sco_cb.sco_disc_reason; btm_cb.sco_cb.sco_disc_reason = BTM_INVALID_SCO_DISC_REASON; return (res); } /******************************************************************************* ** ** Function BTM_ReadDeviceScoPacketTypes ** ** Description This function is read the SCO packet types that ** the device supports. ** ** Returns Packet types supported by the device. ** One or more of the following (bitmask): ** BTM_SCO_PKT_TYPES_MASK_HV1 ** BTM_SCO_PKT_TYPES_MASK_HV2 ** BTM_SCO_PKT_TYPES_MASK_HV3 ** BTM_SCO_PKT_TYPES_MASK_EV3 ** BTM_SCO_PKT_TYPES_MASK_EV4 ** BTM_SCO_PKT_TYPES_MASK_EV5 ** BTM_SCO_PKT_TYPES_MASK_NO_2_EV3 ** BTM_SCO_PKT_TYPES_MASK_NO_3_EV3 ** BTM_SCO_PKT_TYPES_MASK_NO_2_EV5 ** BTM_SCO_PKT_TYPES_MASK_NO_3_EV5 ** *******************************************************************************/ UINT16 BTM_ReadDeviceScoPacketTypes (void) { return (btm_cb.btm_sco_pkt_types_supported); } /******************************************************************************* ** ** Function BTM_ReadScoHandle ** ** Description This function is used to read the HCI handle used for a specific ** SCO connection, ** ** Returns handle for the connection, or 0xFFFF if invalid SCO index. ** *******************************************************************************/ UINT16 BTM_ReadScoHandle (UINT16 sco_inx) { #if (BTM_MAX_SCO_LINKS>0) tSCO_CONN *p = &btm_cb.sco_cb.sco_db[sco_inx]; /* Validity check */ if ((sco_inx < BTM_MAX_SCO_LINKS) && (p->state == SCO_ST_CONNECTED)) return (p->hci_handle); else return (BTM_INVALID_HCI_HANDLE); #else return (BTM_INVALID_HCI_HANDLE); #endif } /******************************************************************************* ** ** Function BTM_ReadScoBdAddr ** ** Description This function is read the remote BD Address for a specific ** SCO connection, ** ** Returns pointer to BD address or NULL if not known ** *******************************************************************************/ UINT8 *BTM_ReadScoBdAddr (UINT16 sco_inx) { #if (BTM_MAX_SCO_LINKS>0) tSCO_CONN *p = &btm_cb.sco_cb.sco_db[sco_inx]; /* Validity check */ if ((sco_inx < BTM_MAX_SCO_LINKS) && (p->rem_bd_known)) return (p->esco.data.bd_addr); else return (NULL); #else return (NULL); #endif } /******************************************************************************* ** ** Function BTM_SetEScoMode ** ** Description This function sets up the negotiated parameters for SCO or ** eSCO, and sets as the default mode used for outgoing calls to ** BTM_CreateSco. It does not change any currently active (e)SCO links. ** Note: Incoming (e)SCO connections will always use packet types ** supported by the controller. If eSCO is not desired the ** feature should be disabled in the controller's feature mask. ** ** Returns BTM_SUCCESS if the successful. ** BTM_BUSY if there are one or more active (e)SCO links. ** *******************************************************************************/ tBTM_STATUS BTM_SetEScoMode (tBTM_SCO_TYPE sco_mode, tBTM_ESCO_PARAMS *p_parms) { tSCO_CB *p_esco = &btm_cb.sco_cb; tBTM_ESCO_PARAMS *p_def = &p_esco->def_esco_parms; if (p_esco->esco_supported) { if (p_parms) { if (sco_mode == BTM_LINK_TYPE_ESCO) *p_def = *p_parms; /* Save as the default parameters */ else /* Load only the SCO packet types */ { p_def->packet_types = p_parms->packet_types; p_def->tx_bw = BTM_64KBITS_RATE; p_def->rx_bw = BTM_64KBITS_RATE; p_def->max_latency = 0x000a; p_def->voice_contfmt = 0x0060; p_def->retrans_effort = 0; /* OR in any exception packet types if at least 2.0 version of spec */ if (btm_cb.devcb.local_version.hci_version >= HCI_PROTO_VERSION_2_0) { p_def->packet_types |= BTM_SCO_EXCEPTION_PKTS_MASK; } } } p_esco->desired_sco_mode = sco_mode; BTM_TRACE_API1("BTM_SetEScoMode -> mode %d", sco_mode); } else { p_esco->desired_sco_mode = BTM_LINK_TYPE_SCO; p_def->packet_types &= BTM_SCO_LINK_ONLY_MASK; p_def->retrans_effort = 0; BTM_TRACE_API0("BTM_SetEScoMode -> mode SCO (eSCO not supported)"); } BTM_TRACE_DEBUG6(" txbw 0x%08x, rxbw 0x%08x, max_lat 0x%04x, voice 0x%04x, pkt 0x%04x, rtx effort 0x%02x", p_def->tx_bw, p_def->rx_bw, p_def->max_latency, p_def->voice_contfmt, p_def->packet_types, p_def->retrans_effort); return (BTM_SUCCESS); } /******************************************************************************* ** ** Function BTM_RegForEScoEvts ** ** Description This function registers a SCO event callback with the ** specified instance. It should be used to received ** connection indication events and change of link parameter ** events. ** ** Returns BTM_SUCCESS if the successful. ** BTM_ILLEGAL_VALUE if there is an illegal sco_inx ** BTM_MODE_UNSUPPORTED if controller version is not BT1.2 or ** later or does not support eSCO. ** *******************************************************************************/ tBTM_STATUS BTM_RegForEScoEvts (UINT16 sco_inx, tBTM_ESCO_CBACK *p_esco_cback) { #if (BTM_MAX_SCO_LINKS>0) if (!btm_cb.sco_cb.esco_supported) { btm_cb.sco_cb.sco_db[sco_inx].esco.p_esco_cback = NULL; return (BTM_MODE_UNSUPPORTED); } if (sco_inx < BTM_MAX_SCO_LINKS && btm_cb.sco_cb.sco_db[sco_inx].state != SCO_ST_UNUSED) { btm_cb.sco_cb.sco_db[sco_inx].esco.p_esco_cback = p_esco_cback; return (BTM_SUCCESS); } return (BTM_ILLEGAL_VALUE); #else return (BTM_MODE_UNSUPPORTED); #endif } /******************************************************************************* ** ** Function BTM_ReadEScoLinkParms ** ** Description This function returns the current eSCO link parameters for ** the specified handle. This can be called anytime a connection ** is active, but is typically called after receiving the SCO ** opened callback. ** ** Note: If called over a 1.1 controller, only the packet types ** field has meaning. ** ** Returns BTM_SUCCESS if returned data is valid connection. ** BTM_WRONG_MODE if no connection with a peer device or bad sco_inx. ** *******************************************************************************/ tBTM_STATUS BTM_ReadEScoLinkParms (UINT16 sco_inx, tBTM_ESCO_DATA *p_parms) { #if (BTM_MAX_SCO_LINKS>0) BTM_TRACE_API1("BTM_ReadEScoLinkParms -> sco_inx 0x%04x", sco_inx); if (sco_inx < BTM_MAX_SCO_LINKS && btm_cb.sco_cb.sco_db[sco_inx].state >= SCO_ST_CONNECTED) { *p_parms = btm_cb.sco_cb.sco_db[sco_inx].esco.data; return (BTM_SUCCESS); } #endif memset(p_parms, 0, sizeof(tBTM_ESCO_DATA)); return (BTM_WRONG_MODE); } /******************************************************************************* ** ** Function BTM_ChangeEScoLinkParms ** ** Description This function requests renegotiation of the parameters on ** the current eSCO Link. If any of the changes are accepted ** by the controllers, the BTM_ESCO_CHG_EVT event is sent in ** the tBTM_ESCO_CBACK function with the current settings of ** the link. The callback is registered through the call to ** BTM_SetEScoMode. ** ** Note: If called over a SCO link (including 1.1 controller), ** a change packet type request is sent out instead. ** ** Returns BTM_CMD_STARTED if command is successfully initiated. ** BTM_NO_RESOURCES - not enough resources to initiate command. ** BTM_WRONG_MODE if no connection with a peer device or bad sco_inx. ** *******************************************************************************/ tBTM_STATUS BTM_ChangeEScoLinkParms (UINT16 sco_inx, tBTM_CHG_ESCO_PARAMS *p_parms) { #if (BTM_MAX_SCO_LINKS>0) tBTM_ESCO_PARAMS *p_setup; tSCO_CONN *p_sco; UINT16 temp_pkt_types; /* Make sure sco handle is valid and on an active link */ if (sco_inx >= BTM_MAX_SCO_LINKS || btm_cb.sco_cb.sco_db[sco_inx].state != SCO_ST_CONNECTED) return (BTM_WRONG_MODE); p_sco = &btm_cb.sco_cb.sco_db[sco_inx]; p_setup = &p_sco->esco.setup; /* If SCO connection OR eSCO not supported just send change packet types */ if (p_sco->esco.data.link_type == BTM_LINK_TYPE_SCO || !btm_cb.sco_cb.esco_supported) { p_setup->packet_types = p_parms->packet_types & (btm_cb.btm_sco_pkt_types_supported & BTM_SCO_LINK_ONLY_MASK); BTM_TRACE_API2("BTM_ChangeEScoLinkParms -> SCO Link for handle 0x%04x, pkt 0x%04x", p_sco->hci_handle, p_setup->packet_types); if (!btsnd_hcic_change_conn_type (p_sco->hci_handle, BTM_ESCO_2_SCO(p_setup->packet_types))) return (BTM_NO_RESOURCES); } else { temp_pkt_types = (p_parms->packet_types & BTM_SCO_SUPPORTED_PKTS_MASK & btm_cb.btm_sco_pkt_types_supported); /* OR in any exception packet types if at least 2.0 version of spec */ if (btm_cb.devcb.local_version.hci_version >= HCI_PROTO_VERSION_2_0) { temp_pkt_types |= ((p_parms->packet_types & BTM_SCO_EXCEPTION_PKTS_MASK) | (btm_cb.btm_sco_pkt_types_supported & BTM_SCO_EXCEPTION_PKTS_MASK)); } BTM_TRACE_API1("BTM_ChangeEScoLinkParms -> eSCO Link for handle 0x%04x", p_sco->hci_handle); BTM_TRACE_API6(" txbw 0x%x, rxbw 0x%x, lat 0x%x, voice 0x%x, retrans 0x%02x, pkt 0x%04x", p_setup->tx_bw, p_setup->rx_bw, p_parms->max_latency, p_setup->voice_contfmt, p_parms->retrans_effort, temp_pkt_types); /* When changing an existing link, only change latency, retrans, and pkts */ if (!btsnd_hcic_setup_esco_conn(p_sco->hci_handle, p_setup->tx_bw, p_setup->rx_bw, p_parms->max_latency, p_setup->voice_contfmt, p_parms->retrans_effort, temp_pkt_types)) return (BTM_NO_RESOURCES); else p_parms->packet_types = temp_pkt_types; } return (BTM_CMD_STARTED); #else return (BTM_WRONG_MODE); #endif } /******************************************************************************* ** ** Function BTM_EScoConnRsp ** ** Description This function is called upon receipt of an (e)SCO connection ** request event (BTM_ESCO_CONN_REQ_EVT) to accept or reject ** the request. Parameters used to negotiate eSCO links. ** If p_parms is NULL, then values set through BTM_SetEScoMode ** are used. ** If the link type of the incoming request is SCO, then only ** the tx_bw, max_latency, content format, and packet_types are ** valid. The hci_status parameter should be ** ([0x0] to accept, [0x0d..0x0f] to reject) ** ** ** Returns void ** *******************************************************************************/ void BTM_EScoConnRsp (UINT16 sco_inx, UINT8 hci_status, tBTM_ESCO_PARAMS *p_parms) { #if (BTM_MAX_SCO_LINKS>0) if (sco_inx < BTM_MAX_SCO_LINKS && btm_cb.sco_cb.sco_db[sco_inx].state == SCO_ST_W4_CONN_RSP) { btm_esco_conn_rsp(sco_inx, hci_status, btm_cb.sco_cb.sco_db[sco_inx].esco.data.bd_addr, p_parms); } #endif } /******************************************************************************* ** ** Function btm_read_def_esco_mode ** ** Description This function copies the current default esco settings into ** the return buffer. ** ** Returns tBTM_SCO_TYPE ** *******************************************************************************/ tBTM_SCO_TYPE btm_read_def_esco_mode (tBTM_ESCO_PARAMS *p_parms) { #if (BTM_MAX_SCO_LINKS>0) *p_parms = btm_cb.sco_cb.def_esco_parms; return btm_cb.sco_cb.desired_sco_mode; #else return BTM_LINK_TYPE_SCO; #endif } /******************************************************************************* ** ** Function btm_esco_proc_conn_chg ** ** Description This function is called by BTIF when an SCO connection ** is changed. ** ** Returns void ** *******************************************************************************/ void btm_esco_proc_conn_chg (UINT8 status, UINT16 handle, UINT8 tx_interval, UINT8 retrans_window, UINT16 rx_pkt_len, UINT16 tx_pkt_len) { #if (BTM_MAX_SCO_LINKS>0) tSCO_CONN *p = &btm_cb.sco_cb.sco_db[0]; tBTM_CHG_ESCO_EVT_DATA data; UINT16 xx; BTM_TRACE_EVENT2("btm_esco_proc_conn_chg -> handle 0x%04x, status 0x%02x", handle, status); for (xx = 0; xx < BTM_MAX_SCO_LINKS; xx++, p++) { if (p->state == SCO_ST_CONNECTED && handle == p->hci_handle) { /* If upper layer wants notification */ if (p->esco.p_esco_cback) { memcpy(data.bd_addr, p->esco.data.bd_addr, BD_ADDR_LEN); data.hci_status = status; data.sco_inx = xx; data.rx_pkt_len = p->esco.data.rx_pkt_len = rx_pkt_len; data.tx_pkt_len = p->esco.data.tx_pkt_len = tx_pkt_len; data.tx_interval = p->esco.data.tx_interval = tx_interval; data.retrans_window = p->esco.data.retrans_window = retrans_window; (*p->esco.p_esco_cback)(BTM_ESCO_CHG_EVT, (tBTM_ESCO_EVT_DATA *)&data); } return; } } #endif } /******************************************************************************* ** ** Function btm_is_sco_active ** ** Description This function is called to see if a SCO handle is already in ** use. ** ** Returns BOOLEAN ** *******************************************************************************/ BOOLEAN btm_is_sco_active (UINT16 handle) { #if (BTM_MAX_SCO_LINKS>0) UINT16 xx; tSCO_CONN *p = &btm_cb.sco_cb.sco_db[0]; for (xx = 0; xx < BTM_MAX_SCO_LINKS; xx++, p++) { if (handle == p->hci_handle && p->state == SCO_ST_CONNECTED) return (TRUE); } #endif return (FALSE); } /******************************************************************************* ** ** Function BTM_GetNumScoLinks ** ** Description This function returns the number of active sco links. ** ** Returns UINT8 ** *******************************************************************************/ UINT8 BTM_GetNumScoLinks (void) { #if (BTM_MAX_SCO_LINKS>0) tSCO_CONN *p = &btm_cb.sco_cb.sco_db[0]; UINT16 xx; UINT8 num_scos = 0; for (xx = 0; xx < BTM_MAX_SCO_LINKS; xx++, p++) { switch (p->state) { case SCO_ST_W4_CONN_RSP: case SCO_ST_CONNECTING: case SCO_ST_CONNECTED: case SCO_ST_DISCONNECTING: case SCO_ST_PEND_UNPARK: num_scos++; } } return (num_scos); #else return (0); #endif } /******************************************************************************* ** ** Function btm_is_sco_active_by_bdaddr ** ** Description This function is called to see if a SCO active to a bd address. ** ** Returns BOOLEAN ** *******************************************************************************/ BOOLEAN btm_is_sco_active_by_bdaddr (BD_ADDR remote_bda) { #if (BTM_MAX_SCO_LINKS>0) UINT8 xx; tSCO_CONN *p = &btm_cb.sco_cb.sco_db[0]; /* If any SCO is being established to the remote BD address, refuse this */ for (xx = 0; xx < BTM_MAX_SCO_LINKS; xx++, p++) { if ((!memcmp (p->esco.data.bd_addr, remote_bda, BD_ADDR_LEN)) && (p->state == SCO_ST_CONNECTED)) { return (TRUE); } } #endif return (FALSE); } #else /* SCO_EXCLUDED == TRUE (Link in stubs) */ tBTM_STATUS BTM_CreateSco (BD_ADDR remote_bda, BOOLEAN is_orig, UINT16 pkt_types, UINT16 *p_sco_inx, tBTM_SCO_CB *p_conn_cb, tBTM_SCO_CB *p_disc_cb) {return (BTM_NO_RESOURCES);} tBTM_STATUS BTM_RemoveSco (UINT16 sco_inx) {return (BTM_NO_RESOURCES);} tBTM_STATUS BTM_SetScoPacketTypes (UINT16 sco_inx, UINT16 pkt_types) {return (BTM_NO_RESOURCES);} UINT16 BTM_ReadScoPacketTypes (UINT16 sco_inx) {return (0);} UINT16 BTM_ReadDeviceScoPacketTypes (void) {return (0);} UINT16 BTM_ReadScoHandle (UINT16 sco_inx) {return (BTM_INVALID_HCI_HANDLE);} UINT8 *BTM_ReadScoBdAddr(UINT16 sco_inx) {return((UINT8 *) NULL);} UINT16 BTM_ReadScoDiscReason (void) {return (BTM_INVALID_SCO_DISC_REASON);} tBTM_STATUS BTM_SetEScoMode (tBTM_SCO_TYPE sco_mode, tBTM_ESCO_PARAMS *p_parms) {return (BTM_MODE_UNSUPPORTED);} tBTM_STATUS BTM_RegForEScoEvts (UINT16 sco_inx, tBTM_ESCO_CBACK *p_esco_cback) { return (BTM_ILLEGAL_VALUE);} tBTM_STATUS BTM_ReadEScoLinkParms (UINT16 sco_inx, tBTM_ESCO_DATA *p_parms) { return (BTM_MODE_UNSUPPORTED);} tBTM_STATUS BTM_ChangeEScoLinkParms (UINT16 sco_inx, tBTM_CHG_ESCO_PARAMS *p_parms) { return (BTM_MODE_UNSUPPORTED);} void BTM_EScoConnRsp (UINT16 sco_inx, UINT8 hci_status, tBTM_ESCO_PARAMS *p_parms) {} UINT8 BTM_GetNumScoLinks (void) {return (0);} #endif /* If SCO is being used */