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1 | /****************************************************************************** |
2 | ||
3 | AudioScience HPI driver | |
4 | Copyright (C) 1997-2010 AudioScience Inc. <support@audioscience.com> | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of version 2 of the GNU General Public License as | |
8 | published by the Free Software Foundation; | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; if not, write to the Free Software | |
17 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | ||
19 | Hardware Programming Interface (HPI) Utility functions. | |
20 | ||
21 | (C) Copyright AudioScience Inc. 2007 | |
22 | *******************************************************************************/ | |
23 | ||
24 | #include "hpi_internal.h" | |
25 | #include "hpimsginit.h" | |
26 | ||
27 | /* The actual message size for each object type */ | |
28 | static u16 msg_size[HPI_OBJ_MAXINDEX + 1] = HPI_MESSAGE_SIZE_BY_OBJECT; | |
29 | /* The actual response size for each object type */ | |
30 | static u16 res_size[HPI_OBJ_MAXINDEX + 1] = HPI_RESPONSE_SIZE_BY_OBJECT; | |
31 | /* Flag to enable alternate message type for SSX2 bypass. */ | |
32 | static u16 gwSSX2_bypass; | |
33 | ||
34 | /** \internal | |
35 | * Used by ASIO driver to disable SSX2 for a single process | |
36 | * \param phSubSys Pointer to HPI subsystem handle. | |
37 | * \param wBypass New bypass setting 0 = off, nonzero = on | |
38 | * \return Previous bypass setting. | |
39 | */ | |
40 | u16 hpi_subsys_ssx2_bypass(const struct hpi_hsubsys *ph_subsys, u16 bypass) | |
41 | { | |
42 | u16 old_value = gwSSX2_bypass; | |
43 | ||
44 | gwSSX2_bypass = bypass; | |
45 | ||
46 | return old_value; | |
47 | } | |
48 | ||
49 | /** \internal | |
50 | * initialize the HPI message structure | |
51 | */ | |
52 | static void hpi_init_message(struct hpi_message *phm, u16 object, | |
53 | u16 function) | |
54 | { | |
55 | memset(phm, 0, sizeof(*phm)); | |
56 | if ((object > 0) && (object <= HPI_OBJ_MAXINDEX)) | |
57 | phm->size = msg_size[object]; | |
58 | else | |
59 | phm->size = sizeof(*phm); | |
60 | ||
61 | if (gwSSX2_bypass) | |
62 | phm->type = HPI_TYPE_SSX2BYPASS_MESSAGE; | |
63 | else | |
64 | phm->type = HPI_TYPE_MESSAGE; | |
65 | phm->object = object; | |
66 | phm->function = function; | |
67 | phm->version = 0; | |
68 | /* Expect adapter index to be set by caller */ | |
69 | } | |
70 | ||
71 | /** \internal | |
72 | * initialize the HPI response structure | |
73 | */ | |
74 | void hpi_init_response(struct hpi_response *phr, u16 object, u16 function, | |
75 | u16 error) | |
76 | { | |
77 | memset(phr, 0, sizeof(*phr)); | |
78 | phr->type = HPI_TYPE_RESPONSE; | |
79 | if ((object > 0) && (object <= HPI_OBJ_MAXINDEX)) | |
80 | phr->size = res_size[object]; | |
81 | else | |
82 | phr->size = sizeof(*phr); | |
83 | phr->object = object; | |
84 | phr->function = function; | |
85 | phr->error = error; | |
86 | phr->specific_error = 0; | |
87 | phr->version = 0; | |
88 | } | |
89 | ||
90 | void hpi_init_message_response(struct hpi_message *phm, | |
91 | struct hpi_response *phr, u16 object, u16 function) | |
92 | { | |
93 | hpi_init_message(phm, object, function); | |
94 | /* default error return if the response is | |
95 | not filled in by the callee */ | |
96 | hpi_init_response(phr, object, function, | |
97 | HPI_ERROR_PROCESSING_MESSAGE); | |
98 | } | |
99 | ||
100 | static void hpi_init_messageV1(struct hpi_message_header *phm, u16 size, | |
101 | u16 object, u16 function) | |
102 | { | |
103 | memset(phm, 0, sizeof(*phm)); | |
104 | if ((object > 0) && (object <= HPI_OBJ_MAXINDEX)) { | |
105 | phm->size = size; | |
106 | phm->type = HPI_TYPE_MESSAGE; | |
107 | phm->object = object; | |
108 | phm->function = function; | |
109 | phm->version = 1; | |
110 | /* Expect adapter index to be set by caller */ | |
111 | } | |
112 | } | |
113 | ||
114 | void hpi_init_responseV1(struct hpi_response_header *phr, u16 size, | |
115 | u16 object, u16 function) | |
116 | { | |
117 | memset(phr, 0, sizeof(*phr)); | |
118 | phr->size = size; | |
119 | phr->version = 1; | |
120 | phr->type = HPI_TYPE_RESPONSE; | |
121 | phr->error = HPI_ERROR_PROCESSING_MESSAGE; | |
122 | } | |
123 | ||
124 | void hpi_init_message_responseV1(struct hpi_message_header *phm, u16 msg_size, | |
125 | struct hpi_response_header *phr, u16 res_size, u16 object, | |
126 | u16 function) | |
127 | { | |
128 | hpi_init_messageV1(phm, msg_size, object, function); | |
129 | hpi_init_responseV1(phr, res_size, object, function); | |
130 | } |