1 /**************************************************************************/
2 /* */
3 /* Copyright (c) Microsoft Corporation. All rights reserved. */
4 /* */
5 /* This software is licensed under the Microsoft Software License */
6 /* Terms for Microsoft Azure RTOS. Full text of the license can be */
7 /* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
8 /* and in the root directory of this software. */
9 /* */
10 /**************************************************************************/
11
12
13 /**************************************************************************/
14 /**************************************************************************/
15 /** */
16 /** USBX Component */
17 /** */
18 /** EHCI Controller Driver */
19 /** */
20 /**************************************************************************/
21 /**************************************************************************/
22
23
24 /* Include necessary system files. */
25
26 #define UX_SOURCE_CODE
27
28 #include "ux_api.h"
29 #include "ux_hcd_ehci.h"
30 #include "ux_host_stack.h"
31
32
33 /**************************************************************************/
34 /* */
35 /* FUNCTION RELEASE */
36 /* */
37 /* _ux_hcd_ehci_done_queue_process PORTABLE C */
38 /* 6.1.11 */
39 /* AUTHOR */
40 /* */
41 /* Chaoqiong Xiao, Microsoft Corporation */
42 /* */
43 /* DESCRIPTION */
44 /* */
45 /* This function process the isochronous, periodic and asynchronous */
46 /* lists in search for transfers that occurred in the past */
47 /* (micro-)frame. */
48 /* */
49 /* INPUT */
50 /* */
51 /* hcd_ehci Pointer to EHCI controller */
52 /* */
53 /* OUTPUT */
54 /* */
55 /* None */
56 /* */
57 /* CALLS */
58 /* */
59 /* _ux_hcd_ehci_asynch_td_process Process asynch TD */
60 /* _ux_hcd_ehci_hsisochronous_tds_process */
61 /* Process high speed */
62 /* isochronous TDs */
63 /* _ux_hcd_ehci_fsisochronous_tds_process */
64 /* Process full speed (split) */
65 /* isochronous TDs */
66 /* _ux_utility_virtual_address Get virtual address */
67 /* */
68 /* CALLED BY */
69 /* */
70 /* EHCI Controller Driver */
71 /* */
72 /* RELEASE HISTORY */
73 /* */
74 /* DATE NAME DESCRIPTION */
75 /* */
76 /* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */
77 /* 09-30-2020 Chaoqiong Xiao Modified comment(s), */
78 /* resulting in version 6.1 */
79 /* 11-09-2020 Chaoqiong Xiao Modified comment(s), */
80 /* fixed compile warning, */
81 /* resulting in version 6.1.2 */
82 /* 04-25-2022 Chaoqiong Xiao Modified comment(s), */
83 /* fixed standalone compile, */
84 /* resulting in version 6.1.11 */
85 /* */
86 /**************************************************************************/
_ux_hcd_ehci_done_queue_process(UX_HCD_EHCI * hcd_ehci)87 VOID _ux_hcd_ehci_done_queue_process(UX_HCD_EHCI *hcd_ehci)
88 {
89
90 UX_EHCI_TD *td;
91 UX_EHCI_PERIODIC_LINK_POINTER ed;
92 UX_EHCI_ED *start_ed;
93
94
95 #if UX_MAX_ISO_TD
96 UX_EHCI_PERIODIC_LINK_POINTER lp;
97
98 /* We scan the active isochronous list first. */
99 _ux_host_mutex_on(&hcd_ehci -> ux_hcd_ehci_periodic_mutex);
100 lp.itd_ptr = hcd_ehci -> ux_hcd_ehci_hsiso_scan_list;
101 while(lp.itd_ptr != UX_NULL)
102 {
103
104 /* Process the iTD, return next active TD. */
105 lp.itd_ptr = _ux_hcd_ehci_hsisochronous_tds_process(hcd_ehci, lp.itd_ptr);
106 }
107 _ux_host_mutex_off(&hcd_ehci -> ux_hcd_ehci_periodic_mutex);
108
109 #if defined(UX_HCD_EHCI_SPLIT_TRANSFER_ENABLE)
110
111 /* We scan the split isochronous list then. */
112 _ux_host_mutex_on(&hcd_ehci -> ux_hcd_ehci_periodic_mutex);
113 lp.sitd_ptr = hcd_ehci -> ux_hcd_ehci_fsiso_scan_list;
114 while(lp.sitd_ptr != UX_NULL)
115 {
116
117 /* Process the iTD, return next active TD. */
118 lp.sitd_ptr = _ux_hcd_ehci_fsisochronous_tds_process(hcd_ehci, lp.sitd_ptr);
119 }
120 _ux_host_mutex_off(&hcd_ehci -> ux_hcd_ehci_periodic_mutex);
121
122 #endif
123 #endif
124
125 /* We scan the linked interrupt list then. */
126 _ux_host_mutex_on(&hcd_ehci -> ux_hcd_ehci_periodic_mutex);
127 ed.ed_ptr = hcd_ehci -> ux_hcd_ehci_interrupt_ed_list;
128 while(ed.ed_ptr != UX_NULL)
129 {
130
131 /* Retrieve the fist TD attached to this ED. */
132 td = ed.ed_ptr -> ux_ehci_ed_first_td;
133
134 /* Process TD until there is no next available. */
135 while (td != UX_NULL)
136 td = _ux_hcd_ehci_asynch_td_process(ed.ed_ptr, td);
137
138 /* Next ED. */
139 ed.ed_ptr = ed.ed_ptr -> ux_ehci_ed_next_ed;
140 }
141 _ux_host_mutex_off(&hcd_ehci -> ux_hcd_ehci_periodic_mutex);
142
143 /* Now we can parse the asynchronous list. The head ED is always empty and
144 used as an anchor only. */
145 start_ed = hcd_ehci -> ux_hcd_ehci_asynch_head_list;
146
147 /* Point to the next ED in the asynchronous tree. */
148 ed.ed_ptr = start_ed -> ux_ehci_ed_queue_head;
149 ed.value &= UX_EHCI_LINK_ADDRESS_MASK;
150
151 /* Obtain the virtual address from the element. */
152 ed.void_ptr = _ux_utility_virtual_address(ed.void_ptr);
153
154 /* Now traverse this list until we have found a non anchor endpoint that
155 has transfers done. */
156 while (ed.ed_ptr != start_ed)
157 {
158
159 /* Retrieve the fist TD attached to this ED. */
160 td = ed.ed_ptr -> ux_ehci_ed_first_td;
161 while (td != UX_NULL)
162 {
163
164 td = _ux_hcd_ehci_asynch_td_process(ed.ed_ptr, td);
165 }
166
167 /* Point to the next ED in the asynchronous tree. */
168 ed.ed_ptr = ed.ed_ptr -> ux_ehci_ed_queue_head;
169 ed.value &= UX_EHCI_LINK_ADDRESS_MASK;
170
171 /* Obtain the virtual address from the element. */
172 ed.void_ptr = _ux_utility_virtual_address(ed.void_ptr);
173 }
174 }
175
176
