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 * nterface 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 WC_ASSERT(AVRC_CMD_POOL_SIZE > (AVRC_MIN_CMD_LEN+p_msg->vendor_len)); 57 if ((p_cmd = (BT_HDR *) GKI_getpoolbuf(AVRC_CMD_POOL_ID)) != NULL) 58 { 59 p_cmd->offset = AVCT_MSG_OFFSET; 60 p_data = (UINT8 *)(p_cmd + 1) + p_cmd->offset; 61 *p_data++ = (p_msg->hdr.ctype & AVRC_CTYPE_MASK); 62 *p_data++ = (p_msg->hdr.subunit_type << AVRC_SUBTYPE_SHIFT) | p_msg->hdr.subunit_id; 63 *p_data++ = AVRC_OP_VENDOR; 64 AVRC_CO_ID_TO_BE_STREAM(p_data, p_msg->company_id); 65 if(p_msg->vendor_len && p_msg->p_vendor_data) 66 { 67 memcpy(p_data, p_msg->p_vendor_data, p_msg->vendor_len); 68 } 69 p_cmd->len = (UINT16) (p_data + p_msg->vendor_len - (UINT8 *)(p_cmd + 1) - p_cmd->offset); 70 p_cmd->layer_specific = AVCT_DATA_CTRL; 71 } 72 return p_cmd; 73 } 74 75 /****************************************************************************** 76 ** 77 ** Function AVRC_UnitCmd 78 ** 79 ** Description Send a UNIT INFO command to the peer device. This 80 ** function can only be called for controller role connections. 81 ** Any response message from the peer is passed back through 82 ** the tAVRC_MSG_CBACK callback function. 83 ** 84 ** Input Parameters: 85 ** handle: Handle of this connection. 86 ** 87 ** label: Transaction label. 88 ** 89 ** Output Parameters: 90 ** None. 91 ** 92 ** Returns AVRC_SUCCESS if successful. 93 ** AVRC_BAD_HANDLE if handle is invalid. 94 ** 95 ******************************************************************************/ 96 UINT16 AVRC_UnitCmd(UINT8 handle, UINT8 label) 97 { 98 BT_HDR *p_cmd; 99 UINT8 *p_data; 100 101 if ((p_cmd = (BT_HDR *) GKI_getpoolbuf(AVRC_CMD_POOL_ID)) != NULL) 102 { 103 p_cmd->offset = AVCT_MSG_OFFSET; 104 p_data = (UINT8 *)(p_cmd + 1) + p_cmd->offset; 105 *p_data++ = AVRC_CMD_STATUS; 106 /* unit & id ignore */ 107 *p_data++ = (AVRC_SUB_UNIT << AVRC_SUBTYPE_SHIFT) | AVRC_SUBID_IGNORE; 108 *p_data++ = AVRC_OP_UNIT_INFO; 109 memset(p_data, AVRC_CMD_OPRND_PAD, AVRC_UNIT_OPRND_BYTES); 110 p_cmd->len = p_data + AVRC_UNIT_OPRND_BYTES - (UINT8 *)(p_cmd + 1) - p_cmd->offset; 111 p_cmd->layer_specific = AVCT_DATA_CTRL; 112 } 113 return AVCT_MsgReq( handle, label, AVCT_CMD, p_cmd); 114 } 115 116 /****************************************************************************** 117 ** 118 ** Function AVRC_SubCmd 119 ** 120 ** Description Send a SUBUNIT INFO command to the peer device. This 121 ** function can only be called for controller role connections. 122 ** Any response message from the peer is passed back through 123 ** the tAVRC_MSG_CBACK callback function. 124 ** 125 ** Input Parameters: 126 ** handle: Handle of this connection. 127 ** 128 ** label: Transaction label. 129 ** 130 ** page: Specifies which part of the subunit type table 131 ** is requested. For AVRCP it is typically zero. 132 ** Value range is 0-7. 133 ** 134 ** Output Parameters: 135 ** None. 136 ** 137 ** Returns AVRC_SUCCESS if successful. 138 ** AVRC_BAD_HANDLE if handle is invalid. 139 ** 140 ******************************************************************************/ 141 UINT16 AVRC_SubCmd(UINT8 handle, UINT8 label, UINT8 page) 142 { 143 BT_HDR *p_cmd; 144 UINT8 *p_data; 145 146 if ((p_cmd = (BT_HDR *) GKI_getpoolbuf(AVRC_CMD_POOL_ID)) != NULL) 147 { 148 p_cmd->offset = AVCT_MSG_OFFSET; 149 p_data = (UINT8 *)(p_cmd + 1) + p_cmd->offset; 150 *p_data++ = AVRC_CMD_STATUS; 151 /* unit & id ignore */ 152 *p_data++ = (AVRC_SUB_UNIT << AVRC_SUBTYPE_SHIFT) | AVRC_SUBID_IGNORE; 153 *p_data++ = AVRC_OP_SUB_INFO; 154 *p_data++ = ((page&AVRC_SUB_PAGE_MASK) << AVRC_SUB_PAGE_SHIFT) | AVRC_SUB_EXT_CODE; 155 memset(p_data, AVRC_CMD_OPRND_PAD, AVRC_SUB_OPRND_BYTES); 156 p_cmd->len = p_data + AVRC_SUB_OPRND_BYTES - (UINT8 *)(p_cmd + 1) - p_cmd->offset; 157 p_cmd->layer_specific = AVCT_DATA_CTRL; 158 } 159 return AVCT_MsgReq( handle, label, AVCT_CMD, p_cmd); 160 } 161 162 /****************************************************************************** 163 ** 164 ** Function AVRC_VendorCmd 165 ** 166 ** Description Send a VENDOR DEPENDENT command to the peer device. This 167 ** function can only be called for controller role connections. 168 ** Any response message from the peer is passed back through 169 ** the tAVRC_MSG_CBACK callback function. 170 ** 171 ** Input Parameters: 172 ** handle: Handle of this connection. 173 ** 174 ** label: Transaction label. 175 ** 176 ** p_msg: Pointer to VENDOR DEPENDENT message structure. 177 ** 178 ** Output Parameters: 179 ** None. 180 ** 181 ** Returns AVRC_SUCCESS if successful. 182 ** AVRC_BAD_HANDLE if handle is invalid. 183 ** 184 ******************************************************************************/ 185 UINT16 AVRC_VendorCmd(UINT8 handle, UINT8 label, tAVRC_MSG_VENDOR *p_msg) 186 { 187 BT_HDR *p_buf = avrc_vendor_msg(p_msg); 188 if (p_buf) 189 return AVCT_MsgReq( handle, label, AVCT_CMD, p_buf); 190 else 191 return AVCT_NO_RESOURCES; 192 } 193 194 195 /****************************************************************************** 196 ** 197 ** Function AVRC_VendorRsp 198 ** 199 ** Description Send a VENDOR DEPENDENT response to the peer device. This 200 ** function can only be called for target role connections. 201 ** This function must be called when a VENDOR DEPENDENT 202 ** command message is received from the peer through the 203 ** tAVRC_MSG_CBACK callback function. 204 ** 205 ** Input Parameters: 206 ** handle: Handle of this connection. 207 ** 208 ** label: Transaction label. Must be the same value as 209 ** passed with the command message in the callback function. 210 ** 211 ** p_msg: Pointer to VENDOR DEPENDENT message structure. 212 ** 213 ** Output Parameters: 214 ** None. 215 ** 216 ** Returns AVRC_SUCCESS if successful. 217 ** AVRC_BAD_HANDLE if handle is invalid. 218 ** 219 ******************************************************************************/ 220 UINT16 AVRC_VendorRsp(UINT8 handle, UINT8 label, tAVRC_MSG_VENDOR *p_msg) 221 { 222 BT_HDR *p_buf = avrc_vendor_msg(p_msg); 223 if (p_buf) 224 return AVCT_MsgReq( handle, label, AVCT_RSP, p_buf); 225 else 226 return AVCT_NO_RESOURCES; 227 } 228 229 230 231
