Merge tag 'reset-for-v5.3' of git://git.pengutronix.de/git/pza/linux into arm/drivers
[sfrench/cifs-2.6.git] / sound / pci / asihpi / hpimsginit.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /******************************************************************************
3
4     AudioScience HPI driver
5     Copyright (C) 1997-2014  AudioScience Inc. <support@audioscience.com>
6
7
8  Hardware Programming Interface (HPI) Utility functions.
9
10  (C) Copyright AudioScience Inc. 2007
11 *******************************************************************************/
12
13 #include "hpi_internal.h"
14 #include "hpimsginit.h"
15 #include <linux/nospec.h>
16
17 /* The actual message size for each object type */
18 static u16 msg_size[HPI_OBJ_MAXINDEX + 1] = HPI_MESSAGE_SIZE_BY_OBJECT;
19 /* The actual response size for each object type */
20 static u16 res_size[HPI_OBJ_MAXINDEX + 1] = HPI_RESPONSE_SIZE_BY_OBJECT;
21 /* Flag to enable alternate message type for SSX2 bypass. */
22 static u16 gwSSX2_bypass;
23
24 /** \internal
25   * initialize the HPI message structure
26   */
27 static void hpi_init_message(struct hpi_message *phm, u16 object,
28         u16 function)
29 {
30         u16 size;
31
32         if ((object > 0) && (object <= HPI_OBJ_MAXINDEX)) {
33                 object = array_index_nospec(object, HPI_OBJ_MAXINDEX + 1);
34                 size = msg_size[object];
35         } else {
36                 size = sizeof(*phm);
37         }
38
39         memset(phm, 0, size);
40         phm->size = size;
41
42         if (gwSSX2_bypass)
43                 phm->type = HPI_TYPE_SSX2BYPASS_MESSAGE;
44         else
45                 phm->type = HPI_TYPE_REQUEST;
46         phm->object = object;
47         phm->function = function;
48         phm->version = 0;
49         phm->adapter_index = HPI_ADAPTER_INDEX_INVALID;
50         /* Expect actual adapter index to be set by caller */
51 }
52
53 /** \internal
54   * initialize the HPI response structure
55   */
56 void hpi_init_response(struct hpi_response *phr, u16 object, u16 function,
57         u16 error)
58 {
59         u16 size;
60
61         if ((object > 0) && (object <= HPI_OBJ_MAXINDEX)) {
62                 object = array_index_nospec(object, HPI_OBJ_MAXINDEX + 1);
63                 size = res_size[object];
64         } else {
65                 size = sizeof(*phr);
66         }
67
68         memset(phr, 0, sizeof(*phr));
69         phr->size = size;
70         phr->type = HPI_TYPE_RESPONSE;
71         phr->object = object;
72         phr->function = function;
73         phr->error = error;
74         phr->specific_error = 0;
75         phr->version = 0;
76 }
77
78 void hpi_init_message_response(struct hpi_message *phm,
79         struct hpi_response *phr, u16 object, u16 function)
80 {
81         hpi_init_message(phm, object, function);
82         /* default error return if the response is
83            not filled in by the callee */
84         hpi_init_response(phr, object, function,
85                 HPI_ERROR_PROCESSING_MESSAGE);
86 }
87
88 static void hpi_init_messageV1(struct hpi_message_header *phm, u16 size,
89         u16 object, u16 function)
90 {
91         memset(phm, 0, size);
92         if ((object > 0) && (object <= HPI_OBJ_MAXINDEX)) {
93                 phm->size = size;
94                 phm->type = HPI_TYPE_REQUEST;
95                 phm->object = object;
96                 phm->function = function;
97                 phm->version = 1;
98                 /* Expect adapter index to be set by caller */
99         }
100 }
101
102 void hpi_init_responseV1(struct hpi_response_header *phr, u16 size,
103         u16 object, u16 function)
104 {
105         (void)object;
106         (void)function;
107         memset(phr, 0, size);
108         phr->size = size;
109         phr->version = 1;
110         phr->type = HPI_TYPE_RESPONSE;
111         phr->error = HPI_ERROR_PROCESSING_MESSAGE;
112 }
113
114 void hpi_init_message_responseV1(struct hpi_message_header *phm, u16 msg_size,
115         struct hpi_response_header *phr, u16 res_size, u16 object,
116         u16 function)
117 {
118         hpi_init_messageV1(phm, msg_size, object, function);
119         hpi_init_responseV1(phr, res_size, object, function);
120 }