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