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 /** Device Stack */
19 /** */
20 /**************************************************************************/
21 /**************************************************************************/
22
23 #define UX_SOURCE_CODE
24
25
26 /* Include necessary system files. */
27
28 #include "ux_api.h"
29 #include "ux_device_stack.h"
30
31
32 /**************************************************************************/
33 /* */
34 /* FUNCTION RELEASE */
35 /* */
36 /* _ux_device_stack_endpoint_stall PORTABLE C */
37 /* 6.1.10 */
38 /* AUTHOR */
39 /* */
40 /* Chaoqiong Xiao, Microsoft Corporation */
41 /* */
42 /* DESCRIPTION */
43 /* */
44 /* This function stalls an endpoint. The host will need to reissue */
45 /* a reset to clear the endpoint. */
46 /* */
47 /* INPUT */
48 /* */
49 /* endpoint Pointer to endpoint */
50 /* */
51 /* OUTPUT */
52 /* */
53 /* Completion Status */
54 /* */
55 /* CALLS */
56 /* */
57 /* (ux_slave_dcd_function) DCD dispatch function */
58 /* */
59 /* CALLED BY */
60 /* */
61 /* Application */
62 /* */
63 /* RELEASE HISTORY */
64 /* */
65 /* DATE NAME DESCRIPTION */
66 /* */
67 /* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */
68 /* 09-30-2020 Chaoqiong Xiao Modified comment(s), */
69 /* used UX prefix to refer to */
70 /* TX symbols instead of using */
71 /* them directly, */
72 /* resulting in version 6.1 */
73 /* 01-31-2022 Chaoqiong Xiao Modified comment(s), */
74 /* added standalone support, */
75 /* resulting in version 6.1.10 */
76 /* */
77 /**************************************************************************/
_ux_device_stack_endpoint_stall(UX_SLAVE_ENDPOINT * endpoint)78 UINT _ux_device_stack_endpoint_stall(UX_SLAVE_ENDPOINT *endpoint)
79 {
80
81 UX_INTERRUPT_SAVE_AREA
82
83 UX_SLAVE_DCD *dcd;
84 UINT status;
85
86 /* If trace is enabled, insert this event into the trace buffer. */
87 UX_TRACE_IN_LINE_INSERT(UX_TRACE_DEVICE_STACK_ENDPOINT_STALL, endpoint, 0, 0, 0, UX_TRACE_DEVICE_STACK_EVENTS, 0, 0)
88
89 /* Get the pointer to the DCD. */
90 dcd = &_ux_system_slave -> ux_system_slave_dcd;
91
92 /* Assume device is in an invalid state here in order to reduce code in following
93 section where interrupts are disabled. */
94 status = UX_ERROR;
95
96 /* Ensure we don't change the endpoint's state after disconnection routine
97 resets it. */
98 UX_DISABLE
99
100 /* Check if the device is in a valid state; as soon as the device is out
101 of the RESET state, transfers occur and thus endpoints may be stalled. */
102 if (_ux_system_slave -> ux_system_slave_device.ux_slave_device_state != UX_DEVICE_RESET &&
103 endpoint -> ux_slave_endpoint_state != UX_ENDPOINT_HALTED)
104 {
105
106 /* Stall the endpoint. */
107 status = dcd -> ux_slave_dcd_function(dcd, UX_DCD_STALL_ENDPOINT, endpoint);
108
109 /* Mark the endpoint state. */
110 if ((endpoint -> ux_slave_endpoint_descriptor.bmAttributes & UX_MASK_ENDPOINT_TYPE) !=
111 UX_CONTROL_ENDPOINT)
112 endpoint -> ux_slave_endpoint_state = UX_ENDPOINT_HALTED;
113 }
114
115 /* Restore interrupts. */
116 UX_RESTORE
117
118 /* Return completion status. */
119 return(status);
120 }
121
122
