1 |
|
|
/*************************************************************************** |
2 |
|
|
* Copyright (c) 2024 Microsoft Corporation |
3 |
|
|
* |
4 |
|
|
* This program and the accompanying materials are made available under the |
5 |
|
|
* terms of the MIT License which is available at |
6 |
|
|
* https://opensource.org/licenses/MIT. |
7 |
|
|
* |
8 |
|
|
* SPDX-License-Identifier: MIT |
9 |
|
|
**************************************************************************/ |
10 |
|
|
|
11 |
|
|
|
12 |
|
|
/**************************************************************************/ |
13 |
|
|
/**************************************************************************/ |
14 |
|
|
/** */ |
15 |
|
|
/** USBX Component */ |
16 |
|
|
/** */ |
17 |
|
|
/** Hub Class */ |
18 |
|
|
/** */ |
19 |
|
|
/**************************************************************************/ |
20 |
|
|
/**************************************************************************/ |
21 |
|
|
|
22 |
|
|
|
23 |
|
|
/* Include necessary system files. */ |
24 |
|
|
|
25 |
|
|
#define UX_SOURCE_CODE |
26 |
|
|
|
27 |
|
|
#include "ux_api.h" |
28 |
|
|
#include "ux_host_class_hub.h" |
29 |
|
|
#include "ux_host_stack.h" |
30 |
|
|
|
31 |
|
|
|
32 |
|
|
/**************************************************************************/ |
33 |
|
|
/* */ |
34 |
|
|
/* FUNCTION RELEASE */ |
35 |
|
|
/* */ |
36 |
|
|
/* _ux_host_class_hub_change_process PORTABLE C */ |
37 |
|
|
/* 6.1 */ |
38 |
|
|
/* AUTHOR */ |
39 |
|
|
/* */ |
40 |
|
|
/* Chaoqiong Xiao, Microsoft Corporation */ |
41 |
|
|
/* */ |
42 |
|
|
/* DESCRIPTION */ |
43 |
|
|
/* */ |
44 |
|
|
/* This function is called by the topology thread when there has been */ |
45 |
|
|
/* activity on the HUB. */ |
46 |
|
|
/* */ |
47 |
|
|
/* INPUT */ |
48 |
|
|
/* */ |
49 |
|
|
/* hub Pointer to HUB */ |
50 |
|
|
/* */ |
51 |
|
|
/* OUTPUT */ |
52 |
|
|
/* */ |
53 |
|
|
/* Completion Status */ |
54 |
|
|
/* */ |
55 |
|
|
/* CALLS */ |
56 |
|
|
/* */ |
57 |
|
|
/* _ux_host_class_hub_port_change_process Port change process */ |
58 |
|
|
/* _ux_host_stack_transfer_request Process transfer request */ |
59 |
|
|
/* _ux_utility_short_get Get 16-bit word */ |
60 |
|
|
/* */ |
61 |
|
|
/* CALLED BY */ |
62 |
|
|
/* */ |
63 |
|
|
/* HUB Class */ |
64 |
|
|
/* */ |
65 |
|
|
/* RELEASE HISTORY */ |
66 |
|
|
/* */ |
67 |
|
|
/* DATE NAME DESCRIPTION */ |
68 |
|
|
/* */ |
69 |
|
|
/* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */ |
70 |
|
|
/* 09-30-2020 Chaoqiong Xiao Modified comment(s), */ |
71 |
|
|
/* resulting in version 6.1 */ |
72 |
|
|
/* */ |
73 |
|
|
/**************************************************************************/ |
74 |
|
27 |
UINT _ux_host_class_hub_change_process(UX_HOST_CLASS_HUB *hub) |
75 |
|
|
{ |
76 |
|
|
|
77 |
|
|
UX_TRANSFER *transfer_request; |
78 |
|
|
USHORT port_status_change_bits; |
79 |
|
|
UINT port_index; |
80 |
|
|
UINT status; |
81 |
|
|
|
82 |
|
|
|
83 |
|
|
/* Now get the transfer_request attached to the interrupt endpoint. */ |
84 |
|
27 |
transfer_request = &hub -> ux_host_class_hub_interrupt_endpoint -> ux_endpoint_transfer_request; |
85 |
|
|
|
86 |
|
|
/* The interrupt pipe buffer contains the status change for each of the ports |
87 |
|
|
the length of the buffer can be 1 or 2 depending on the number of ports. |
88 |
|
|
Usually, since HUBs can be bus powered the maximum number of ports is 4. |
89 |
|
|
We must be taking precautions on how we read the buffer content for |
90 |
|
|
big endian machines. */ |
91 |
✓✓ |
27 |
if (transfer_request -> ux_transfer_request_actual_length == 1) |
92 |
|
26 |
port_status_change_bits = (USHORT) *transfer_request -> ux_transfer_request_data_pointer; |
93 |
|
|
else |
94 |
|
1 |
port_status_change_bits = (USHORT)_ux_utility_short_get(transfer_request -> ux_transfer_request_data_pointer); |
95 |
|
|
|
96 |
|
|
/* Scan all bits and report the change on each port. */ |
97 |
✓✓ |
81 |
for (port_index = 1; port_index <= hub -> ux_host_class_hub_descriptor.bNbPorts; port_index++) |
98 |
|
|
{ |
99 |
|
|
|
100 |
✓✓ |
54 |
if (port_status_change_bits & (1<<port_index)) |
101 |
|
27 |
_ux_host_class_hub_port_change_process(hub, port_index); |
102 |
|
|
} |
103 |
|
|
|
104 |
|
|
/* The HUB could also have changed. */ |
105 |
✓✓ |
27 |
if (port_status_change_bits & 1) |
106 |
|
1 |
_ux_host_class_hub_hub_change_process(hub); |
107 |
|
|
|
108 |
|
|
/* The actual length should be cleared for the next transfer. */ |
109 |
|
27 |
transfer_request -> ux_transfer_request_actual_length = 0; |
110 |
|
|
|
111 |
|
|
/* Resend the request to the stack. */ |
112 |
|
27 |
status = _ux_host_stack_transfer_request(transfer_request); |
113 |
|
|
|
114 |
|
|
/* Return completion status. */ |
115 |
|
27 |
return(status); |
116 |
|
|
} |