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 /** Slave Simulator Controller Driver */
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_dcd_sim_slave.h"
30
31
32 /**************************************************************************/
33 /* */
34 /* FUNCTION RELEASE */
35 /* */
36 /* _ux_dcd_sim_slave_transfer_request PORTABLE C */
37 /* 6.1.10 */
38 /* AUTHOR */
39 /* */
40 /* Chaoqiong Xiao, Microsoft Corporation */
41 /* */
42 /* DESCRIPTION */
43 /* */
44 /* This function will initiate a transfer to a specific endpoint. */
45 /* If the endpoint is IN, the endpoint register will be set to accept */
46 /* the request. */
47 /* */
48 /* If the endpoint is IN, the endpoint FIFO will be filled with the */
49 /* buffer and the endpoint register set. */
50 /* */
51 /* INPUT */
52 /* */
53 /* dcd_sim_slave Pointer to device controller */
54 /* transfer_request Pointer to transfer request */
55 /* */
56 /* OUTPUT */
57 /* */
58 /* Completion Status */
59 /* */
60 /* CALLS */
61 /* */
62 /* _ux_utility_semaphore_get Get semaphore */
63 /* _ux_dcd_sim_slave_transfer_abort Abort transfer */
64 /* */
65 /* CALLED BY */
66 /* */
67 /* Slave Simulator Controller Driver */
68 /* */
69 /* RELEASE HISTORY */
70 /* */
71 /* DATE NAME DESCRIPTION */
72 /* */
73 /* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */
74 /* 09-30-2020 Chaoqiong Xiao Modified comment(s), */
75 /* resulting in version 6.1 */
76 /* 01-31-2022 Chaoqiong Xiao Modified comment(s), */
77 /* added standalone support, */
78 /* cleared transfer status */
79 /* before semaphore wakeup to */
80 /* avoid a race condition, */
81 /* resulting in version 6.1.10 */
82 /* */
83 /**************************************************************************/
_ux_dcd_sim_slave_transfer_request(UX_DCD_SIM_SLAVE * dcd_sim_slave,UX_SLAVE_TRANSFER * transfer_request)84 UINT _ux_dcd_sim_slave_transfer_request(UX_DCD_SIM_SLAVE *dcd_sim_slave, UX_SLAVE_TRANSFER *transfer_request)
85 {
86
87 UX_SLAVE_ENDPOINT *endpoint;
88 UX_DCD_SIM_SLAVE_ED *ed;
89 UINT status;
90
91
92 /* Get the pointer to the logical endpoint from the transfer request. */
93 endpoint = transfer_request -> ux_slave_transfer_request_endpoint;
94
95 /* Get the slave endpoint. */
96 ed = (UX_DCD_SIM_SLAVE_ED *) endpoint -> ux_slave_endpoint_ed;
97
98 /* We have a request for a OUT or IN transaction from the host.
99 If the endpoint is a Control endpoint, all this is happening under Interrupt and there is no
100 thread to suspend. */
101 if (ed -> ux_sim_slave_ed_index != 0)
102 {
103
104 /* Set the ED to TRANSFER status. */
105 ed -> ux_sim_slave_ed_status |= UX_DCD_SIM_SLAVE_ED_STATUS_TRANSFER;
106
107 /* We should wait for the semaphore to wake us up. */
108 status = _ux_device_semaphore_get(&transfer_request -> ux_slave_transfer_request_semaphore,
109 transfer_request -> ux_slave_transfer_request_timeout);
110
111 /* Check the completion code. */
112 if (status != UX_SUCCESS)
113 {
114 _ux_dcd_sim_slave_transfer_abort(dcd_sim_slave, transfer_request);
115 transfer_request -> ux_slave_transfer_request_status = UX_TRANSFER_STATUS_COMPLETED;
116 return(status);
117 }
118
119 /* ED TRANSFER has been cleared before semaphore wakeup. */
120
121 /* Check the transfer request completion code. We may have had a BUS reset or
122 a device disconnection. */
123 if (transfer_request -> ux_slave_transfer_request_completion_code != UX_SUCCESS)
124 return(transfer_request -> ux_slave_transfer_request_completion_code);
125 }
126
127 /* Return to caller with success. */
128 return(UX_SUCCESS);
129 }
130
131
