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 <assert.h>
25 #include <string.h>
26
27 #include "bt_common.h"
28 #include "avrc_api.h"
29 #include "avrc_int.h"
30
31 /******************************************************************************
32 **
33 ** Function avrc_vendor_msg
34 **
35 ** Description Compose a VENDOR DEPENDENT command according to p_msg
36 **
37 ** Input Parameters:
38 ** p_msg: Pointer to VENDOR DEPENDENT message structure.
39 **
40 ** Output Parameters:
41 * None.
42 **
43 ** Returns pointer to a valid GKI buffer if successful.
44 ** NULL if p_msg is NULL.
45 **
46 ******************************************************************************/
avrc_vendor_msg(tAVRC_MSG_VENDOR * p_msg)47 static BT_HDR * avrc_vendor_msg(tAVRC_MSG_VENDOR *p_msg)
48 {
49 BT_HDR *p_cmd;
50 UINT8 *p_data;
51
52 assert(p_msg != NULL);
53
54 #if AVRC_METADATA_INCLUDED == TRUE
55 assert(AVRC_META_CMD_BUF_SIZE > (AVRC_MIN_CMD_LEN + p_msg->vendor_len));
56 p_cmd = (BT_HDR *)osi_malloc(AVRC_META_CMD_BUF_SIZE);
57 #else
58 assert(AVRC_CMD_BUF_SIZE > (AVRC_MIN_CMD_LEN + p_msg->vendor_len));
59 p_cmd = (BT_HDR *)osi_malloc(AVRC_CMD_BUF_SIZE);
60 #endif
61
62 p_cmd->offset = AVCT_MSG_OFFSET;
63 p_data = (UINT8 *)(p_cmd + 1) + p_cmd->offset;
64 *p_data++ = (p_msg->hdr.ctype & AVRC_CTYPE_MASK);
65 *p_data++ = (p_msg->hdr.subunit_type << AVRC_SUBTYPE_SHIFT) | p_msg->hdr.subunit_id;
66 *p_data++ = AVRC_OP_VENDOR;
67 AVRC_CO_ID_TO_BE_STREAM(p_data, p_msg->company_id);
68 if (p_msg->vendor_len && p_msg->p_vendor_data)
69 memcpy(p_data, p_msg->p_vendor_data, p_msg->vendor_len);
70 p_cmd->len = (UINT16)(p_data + p_msg->vendor_len - (UINT8 *)(p_cmd + 1) - p_cmd->offset);
71 p_cmd->layer_specific = AVCT_DATA_CTRL;
72
73 return p_cmd;
74 }
75
76 /******************************************************************************
77 **
78 ** Function AVRC_UnitCmd
79 **
80 ** Description Send a UNIT INFO command to the peer device. This
81 ** function can only be called for controller role connections.
82 ** Any response message from the peer is passed back through
83 ** the tAVRC_MSG_CBACK callback function.
84 **
85 ** Input Parameters:
86 ** handle: Handle of this connection.
87 **
88 ** label: Transaction label.
89 **
90 ** Output Parameters:
91 ** None.
92 **
93 ** Returns AVRC_SUCCESS if successful.
94 ** AVRC_BAD_HANDLE if handle is invalid.
95 **
96 ******************************************************************************/
AVRC_UnitCmd(UINT8 handle,UINT8 label)97 UINT16 AVRC_UnitCmd(UINT8 handle, UINT8 label)
98 {
99 BT_HDR *p_cmd = (BT_HDR *)osi_malloc(AVRC_CMD_BUF_SIZE);
100 UINT8 *p_data;
101
102 p_cmd->offset = AVCT_MSG_OFFSET;
103 p_data = (UINT8 *)(p_cmd + 1) + p_cmd->offset;
104 *p_data++ = AVRC_CMD_STATUS;
105 /* unit & id ignore */
106 *p_data++ = (AVRC_SUB_UNIT << AVRC_SUBTYPE_SHIFT) | AVRC_SUBID_IGNORE;
107 *p_data++ = AVRC_OP_UNIT_INFO;
108 memset(p_data, AVRC_CMD_OPRND_PAD, AVRC_UNIT_OPRND_BYTES);
109 p_cmd->len = p_data + AVRC_UNIT_OPRND_BYTES - (UINT8 *)(p_cmd + 1) - p_cmd->offset;
110 p_cmd->layer_specific = AVCT_DATA_CTRL;
111
112 return AVCT_MsgReq(handle, label, AVCT_CMD, p_cmd);
113 }
114
115 /******************************************************************************
116 **
117 ** Function AVRC_SubCmd
118 **
119 ** Description Send a SUBUNIT INFO command to the peer device. This
120 ** function can only be called for controller role connections.
121 ** Any response message from the peer is passed back through
122 ** the tAVRC_MSG_CBACK callback function.
123 **
124 ** Input Parameters:
125 ** handle: Handle of this connection.
126 **
127 ** label: Transaction label.
128 **
129 ** page: Specifies which part of the subunit type table
130 ** is requested. For AVRCP it is typically zero.
131 ** Value range is 0-7.
132 **
133 ** Output Parameters:
134 ** None.
135 **
136 ** Returns AVRC_SUCCESS if successful.
137 ** AVRC_BAD_HANDLE if handle is invalid.
138 **
139 ******************************************************************************/
AVRC_SubCmd(UINT8 handle,UINT8 label,UINT8 page)140 UINT16 AVRC_SubCmd(UINT8 handle, UINT8 label, UINT8 page)
141 {
142 BT_HDR *p_cmd = (BT_HDR *)osi_malloc(AVRC_CMD_BUF_SIZE);
143 UINT8 *p_data;
144
145 p_cmd->offset = AVCT_MSG_OFFSET;
146 p_data = (UINT8 *)(p_cmd + 1) + p_cmd->offset;
147 *p_data++ = AVRC_CMD_STATUS;
148 /* unit & id ignore */
149 *p_data++ = (AVRC_SUB_UNIT << AVRC_SUBTYPE_SHIFT) | AVRC_SUBID_IGNORE;
150 *p_data++ = AVRC_OP_SUB_INFO;
151 *p_data++ = ((page&AVRC_SUB_PAGE_MASK) << AVRC_SUB_PAGE_SHIFT) | AVRC_SUB_EXT_CODE;
152 memset(p_data, AVRC_CMD_OPRND_PAD, AVRC_SUB_OPRND_BYTES);
153 p_cmd->len = p_data + AVRC_SUB_OPRND_BYTES - (UINT8 *)(p_cmd + 1) - p_cmd->offset;
154 p_cmd->layer_specific = AVCT_DATA_CTRL;
155
156 return AVCT_MsgReq(handle, label, AVCT_CMD, p_cmd);
157 }
158
159 /******************************************************************************
160 **
161 ** Function AVRC_VendorCmd
162 **
163 ** Description Send a VENDOR DEPENDENT command to the peer device. This
164 ** function can only be called for controller role connections.
165 ** Any response message from the peer is passed back through
166 ** the tAVRC_MSG_CBACK callback function.
167 **
168 ** Input Parameters:
169 ** handle: Handle of this connection.
170 **
171 ** label: Transaction label.
172 **
173 ** p_msg: Pointer to VENDOR DEPENDENT message structure.
174 **
175 ** Output Parameters:
176 ** None.
177 **
178 ** Returns AVRC_SUCCESS if successful.
179 ** AVRC_BAD_HANDLE if handle is invalid.
180 **
181 ******************************************************************************/
AVRC_VendorCmd(UINT8 handle,UINT8 label,tAVRC_MSG_VENDOR * p_msg)182 UINT16 AVRC_VendorCmd(UINT8 handle, UINT8 label, tAVRC_MSG_VENDOR *p_msg)
183 {
184 BT_HDR *p_buf = avrc_vendor_msg(p_msg);
185 if (p_buf)
186 return AVCT_MsgReq( handle, label, AVCT_CMD, p_buf);
187 else
188 return AVCT_NO_RESOURCES;
189 }
190
191
192 /******************************************************************************
193 **
194 ** Function AVRC_VendorRsp
195 **
196 ** Description Send a VENDOR DEPENDENT response to the peer device. This
197 ** function can only be called for target role connections.
198 ** This function must be called when a VENDOR DEPENDENT
199 ** command message is received from the peer through the
200 ** tAVRC_MSG_CBACK callback function.
201 **
202 ** Input Parameters:
203 ** handle: Handle of this connection.
204 **
205 ** label: Transaction label. Must be the same value as
206 ** passed with the command message in the callback function.
207 **
208 ** p_msg: Pointer to VENDOR DEPENDENT message structure.
209 **
210 ** Output Parameters:
211 ** None.
212 **
213 ** Returns AVRC_SUCCESS if successful.
214 ** AVRC_BAD_HANDLE if handle is invalid.
215 **
216 ******************************************************************************/
AVRC_VendorRsp(UINT8 handle,UINT8 label,tAVRC_MSG_VENDOR * p_msg)217 UINT16 AVRC_VendorRsp(UINT8 handle, UINT8 label, tAVRC_MSG_VENDOR *p_msg)
218 {
219 BT_HDR *p_buf = avrc_vendor_msg(p_msg);
220 if (p_buf)
221 return AVCT_MsgReq( handle, label, AVCT_RSP, p_buf);
222 else
223 return AVCT_NO_RESOURCES;
224 }
225
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228