1 /****************************************************************************** 2 * 3 * Copyright (C) 2003-2012 Broadcom Corporation 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at: 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 ******************************************************************************/ 18 19 /****************************************************************************** 20 * 21 * Interface to AVRCP optional commands 22 * 23 ******************************************************************************/ 24 #include <string.h> 25 26 #include "gki.h" 27 #include "avrc_api.h" 28 #include "avrc_int.h" 29 30 #include "wcassert.h" 31 32 33 /****************************************************************************** 34 ** 35 ** Function avrc_vendor_msg 36 ** 37 ** Description Compose a VENDOR DEPENDENT command according to p_msg 38 ** 39 ** Input Parameters: 40 ** p_msg: Pointer to VENDOR DEPENDENT message structure. 41 ** 42 ** Output Parameters: 43 ** None. 44 ** 45 ** Returns pointer to a valid GKI buffer if successful. 46 ** NULL if p_msg is NULL. 47 ** 48 ******************************************************************************/ 49 static BT_HDR * avrc_vendor_msg(tAVRC_MSG_VENDOR *p_msg) 50 { 51 BT_HDR *p_cmd; 52 UINT8 *p_data; 53 54 WC_ASSERT(p_msg != NULL); 55 56 #if AVRC_METADATA_INCLUDED == TRUE 57 WC_ASSERT(AVRC_META_CMD_POOL_SIZE > (AVRC_MIN_CMD_LEN+p_msg->vendor_len)); 58 if ((p_cmd = (BT_HDR *) GKI_getpoolbuf(AVRC_META_CMD_POOL_ID)) != NULL) 59 #else 60 WC_ASSERT(AVRC_CMD_POOL_SIZE > (AVRC_MIN_CMD_LEN+p_msg->vendor_len)); 61 if ((p_cmd = (BT_HDR *) GKI_getpoolbuf(AVRC_CMD_POOL_ID)) != NULL) 62 #endif 63 { 64 p_cmd->offset = AVCT_MSG_OFFSET; 65 p_data = (UINT8 *)(p_cmd + 1) + p_cmd->offset; 66 *p_data++ = (p_msg->hdr.ctype & AVRC_CTYPE_MASK); 67 *p_data++ = (p_msg->hdr.subunit_type << AVRC_SUBTYPE_SHIFT) | p_msg->hdr.subunit_id; 68 *p_data++ = AVRC_OP_VENDOR; 69 AVRC_CO_ID_TO_BE_STREAM(p_data, p_msg->company_id); 70 if(p_msg->vendor_len && p_msg->p_vendor_data) 71 { 72 memcpy(p_data, p_msg->p_vendor_data, p_msg->vendor_len); 73 } 74 p_cmd->len = (UINT16) (p_data + p_msg->vendor_len - (UINT8 *)(p_cmd + 1) - p_cmd->offset); 75 p_cmd->layer_specific = AVCT_DATA_CTRL; 76 } 77 return p_cmd; 78 } 79 80 /****************************************************************************** 81 ** 82 ** Function AVRC_UnitCmd 83 ** 84 ** Description Send a UNIT INFO command to the peer device. This 85 ** function can only be called for controller role connections. 86 ** Any response message from the peer is passed back through 87 ** the tAVRC_MSG_CBACK callback function. 88 ** 89 ** Input Parameters: 90 ** handle: Handle of this connection. 91 ** 92 ** label: Transaction label. 93 ** 94 ** Output Parameters: 95 ** None. 96 ** 97 ** Returns AVRC_SUCCESS if successful. 98 ** AVRC_BAD_HANDLE if handle is invalid. 99 ** 100 ******************************************************************************/ 101 UINT16 AVRC_UnitCmd(UINT8 handle, UINT8 label) 102 { 103 BT_HDR *p_cmd; 104 UINT8 *p_data; 105 106 if ((p_cmd = (BT_HDR *) GKI_getpoolbuf(AVRC_CMD_POOL_ID)) != NULL) 107 { 108 p_cmd->offset = AVCT_MSG_OFFSET; 109 p_data = (UINT8 *)(p_cmd + 1) + p_cmd->offset; 110 *p_data++ = AVRC_CMD_STATUS; 111 /* unit & id ignore */ 112 *p_data++ = (AVRC_SUB_UNIT << AVRC_SUBTYPE_SHIFT) | AVRC_SUBID_IGNORE; 113 *p_data++ = AVRC_OP_UNIT_INFO; 114 memset(p_data, AVRC_CMD_OPRND_PAD, AVRC_UNIT_OPRND_BYTES); 115 p_cmd->len = p_data + AVRC_UNIT_OPRND_BYTES - (UINT8 *)(p_cmd + 1) - p_cmd->offset; 116 p_cmd->layer_specific = AVCT_DATA_CTRL; 117 } 118 return AVCT_MsgReq( handle, label, AVCT_CMD, p_cmd); 119 } 120 121 /****************************************************************************** 122 ** 123 ** Function AVRC_SubCmd 124 ** 125 ** Description Send a SUBUNIT INFO command to the peer device. This 126 ** function can only be called for controller role connections. 127 ** Any response message from the peer is passed back through 128 ** the tAVRC_MSG_CBACK callback function. 129 ** 130 ** Input Parameters: 131 ** handle: Handle of this connection. 132 ** 133 ** label: Transaction label. 134 ** 135 ** page: Specifies which part of the subunit type table 136 ** is requested. For AVRCP it is typically zero. 137 ** Value range is 0-7. 138 ** 139 ** Output Parameters: 140 ** None. 141 ** 142 ** Returns AVRC_SUCCESS if successful. 143 ** AVRC_BAD_HANDLE if handle is invalid. 144 ** 145 ******************************************************************************/ 146 UINT16 AVRC_SubCmd(UINT8 handle, UINT8 label, UINT8 page) 147 { 148 BT_HDR *p_cmd; 149 UINT8 *p_data; 150 151 if ((p_cmd = (BT_HDR *) GKI_getpoolbuf(AVRC_CMD_POOL_ID)) != NULL) 152 { 153 p_cmd->offset = AVCT_MSG_OFFSET; 154 p_data = (UINT8 *)(p_cmd + 1) + p_cmd->offset; 155 *p_data++ = AVRC_CMD_STATUS; 156 /* unit & id ignore */ 157 *p_data++ = (AVRC_SUB_UNIT << AVRC_SUBTYPE_SHIFT) | AVRC_SUBID_IGNORE; 158 *p_data++ = AVRC_OP_SUB_INFO; 159 *p_data++ = ((page&AVRC_SUB_PAGE_MASK) << AVRC_SUB_PAGE_SHIFT) | AVRC_SUB_EXT_CODE; 160 memset(p_data, AVRC_CMD_OPRND_PAD, AVRC_SUB_OPRND_BYTES); 161 p_cmd->len = p_data + AVRC_SUB_OPRND_BYTES - (UINT8 *)(p_cmd + 1) - p_cmd->offset; 162 p_cmd->layer_specific = AVCT_DATA_CTRL; 163 } 164 return AVCT_MsgReq( handle, label, AVCT_CMD, p_cmd); 165 } 166 167 /****************************************************************************** 168 ** 169 ** Function AVRC_VendorCmd 170 ** 171 ** Description Send a VENDOR DEPENDENT command to the peer device. This 172 ** function can only be called for controller role connections. 173 ** Any response message from the peer is passed back through 174 ** the tAVRC_MSG_CBACK callback function. 175 ** 176 ** Input Parameters: 177 ** handle: Handle of this connection. 178 ** 179 ** label: Transaction label. 180 ** 181 ** p_msg: Pointer to VENDOR DEPENDENT message structure. 182 ** 183 ** Output Parameters: 184 ** None. 185 ** 186 ** Returns AVRC_SUCCESS if successful. 187 ** AVRC_BAD_HANDLE if handle is invalid. 188 ** 189 ******************************************************************************/ 190 UINT16 AVRC_VendorCmd(UINT8 handle, UINT8 label, tAVRC_MSG_VENDOR *p_msg) 191 { 192 BT_HDR *p_buf = avrc_vendor_msg(p_msg); 193 if (p_buf) 194 return AVCT_MsgReq( handle, label, AVCT_CMD, p_buf); 195 else 196 return AVCT_NO_RESOURCES; 197 } 198 199 200 /****************************************************************************** 201 ** 202 ** Function AVRC_VendorRsp 203 ** 204 ** Description Send a VENDOR DEPENDENT response to the peer device. This 205 ** function can only be called for target role connections. 206 ** This function must be called when a VENDOR DEPENDENT 207 ** command message is received from the peer through the 208 ** tAVRC_MSG_CBACK callback function. 209 ** 210 ** Input Parameters: 211 ** handle: Handle of this connection. 212 ** 213 ** label: Transaction label. Must be the same value as 214 ** passed with the command message in the callback function. 215 ** 216 ** p_msg: Pointer to VENDOR DEPENDENT message structure. 217 ** 218 ** Output Parameters: 219 ** None. 220 ** 221 ** Returns AVRC_SUCCESS if successful. 222 ** AVRC_BAD_HANDLE if handle is invalid. 223 ** 224 ******************************************************************************/ 225 UINT16 AVRC_VendorRsp(UINT8 handle, UINT8 label, tAVRC_MSG_VENDOR *p_msg) 226 { 227 BT_HDR *p_buf = avrc_vendor_msg(p_msg); 228 if (p_buf) 229 return AVCT_MsgReq( handle, label, AVCT_RSP, p_buf); 230 else 231 return AVCT_NO_RESOURCES; 232 } 233 234 235 236
