blob: 9a4c499cdc305a6cce01ac611c81565f3ab63166 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
/***************************************************************************
* Copyright (c) 2024 Microsoft Corporation
* Copyright (c) 2026-present Eclipse ThreadX contributors
*
* This program and the accompanying materials are made available under the
* terms of the MIT License which is available at
* https://opensource.org/licenses/MIT.
*
* SPDX-License-Identifier: MIT
**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** USBX Component */
/** */
/** Utility */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#define UX_SOURCE_CODE
#include "ux_api.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_utility_pci_class_scan PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function scans the PCI bus from a certain position for a */
/* specific PCI class. */
/* */
/* INPUT */
/* */
/* pci_class PCI class requested */
/* bus_number PCI bus number */
/* device_number Device number */
/* function_number Function number */
/* current_bus_number Current bus number */
/* current_device_number Current device number */
/* current_function_number Current function number */
/* */
/* OUTPUT */
/* */
/* 32-bit value */
/* */
/* CALLS */
/* */
/* _ux_utility_pci_read PCI read utility */
/* */
/* CALLED BY */
/* */
/* USBX Components */
/* */
/**************************************************************************/
ULONG _ux_utility_pci_class_scan(ULONG pci_class, ULONG bus_number, ULONG device_number,
ULONG function_number, ULONG *current_bus_number,
ULONG *current_device_number, ULONG *current_function_number)
{
ULONG bus_number_index;
ULONG device_number_index;
ULONG function_number_index;
ULONG value;
ULONG current_pci_class;
/* Scan all bus. */
for (bus_number_index = bus_number; bus_number_index <= UX_PCI_NB_BUS; bus_number_index++)
{
/* Scan all devices. */
for(device_number_index = device_number;device_number_index <= UX_PCI_NB_DEVICE; device_number_index++)
{
/* Scan all functions. */
for(function_number_index = function_number; function_number_index <= UX_PCI_NB_FUNCTIONS; function_number_index++)
{
/* Reset all PCI address for next loop. */
function_number = 0;
device_number = 0;
bus_number = 0;
/* Read the PCI class bus/device/function. */
value = _ux_utility_pci_read(bus_number_index, device_number_index, function_number_index,
UX_PCI_CFG_REVISION,32);
/* Isolate the class code which is in the upper 3 bytes. */
current_pci_class = (value >> 8) & 0x00ffffff;
/* Do we have a match with the demanded class? */
if(current_pci_class == pci_class)
{
/* Return the position of this device on the PCI */
*current_bus_number = bus_number_index;
*current_device_number = device_number_index;
*current_function_number = function_number_index;
/* Return success! */
return(UX_SUCCESS);
}
}
}
}
/* Return an error since we didn't find anything. */
return(UX_ERROR);
}
|
