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 /** Slave Simulator Controller Driver */
18 /** */
19 /**************************************************************************/
20 /**************************************************************************/
21
22 #define UX_SOURCE_CODE
23
24
25 /* Include necessary system files. */
26
27 #include "ux_api.h"
28 #include "ux_dcd_sim_slave.h"
29
30
31 #if defined(UX_DEVICE_STANDALONE)
32 /**************************************************************************/
33 /* */
34 /* FUNCTION RELEASE */
35 /* */
36 /* _ux_dcd_sim_slave_transfer_run 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 /* It's for standalone mode. */
52 /* */
53 /* INPUT */
54 /* */
55 /* dcd_sim_slave Pointer to device controller */
56 /* transfer_request Pointer to transfer request */
57 /* */
58 /* OUTPUT */
59 /* */
60 /* State machine Status to check */
61 /* UX_STATE_NEXT Transfer done, to next state */
62 /* UX_STATE_EXIT Abnormal, to reset state */
63 /* (others) Keep running, waiting */
64 /* */
65 /* CALLS */
66 /* */
67 /* _ux_utility_semaphore_get Get semaphore */
68 /* _ux_dcd_sim_slave_transfer_abort Abort transfer */
69 /* */
70 /* CALLED BY */
71 /* */
72 /* Slave Simulator Controller Driver */
73 /* */
74 /* RELEASE HISTORY */
75 /* */
76 /* DATE NAME DESCRIPTION */
77 /* */
78 /* 01-31-2022 Chaoqiong Xiao Initial Version 6.1.10 */
79 /* */
80 /**************************************************************************/
_ux_dcd_sim_slave_transfer_run(UX_DCD_SIM_SLAVE * dcd_sim_slave,UX_SLAVE_TRANSFER * transfer_request)81 UINT _ux_dcd_sim_slave_transfer_run(UX_DCD_SIM_SLAVE *dcd_sim_slave, UX_SLAVE_TRANSFER *transfer_request)
82 {
83
84 UX_INTERRUPT_SAVE_AREA
85
86 UX_SLAVE_ENDPOINT *endpoint;
87 UX_DCD_SIM_SLAVE_ED *ed;
88 ULONG ed_status;
89
90
91 UX_PARAMETER_NOT_USED(dcd_sim_slave);
92
93 /* Get the pointer to the logical endpoint from the transfer request. */
94 endpoint = transfer_request -> ux_slave_transfer_request_endpoint;
95
96 /* Get the slave endpoint. */
97 ed = (UX_DCD_SIM_SLAVE_ED *) endpoint -> ux_slave_endpoint_ed;
98
99 UX_DISABLE
100
101 /* Get current status. */
102 ed_status = ed -> ux_sim_slave_ed_status;
103
104 /* ED freed, must disconnected. */
105 if (ed_status == UX_DCD_SIM_SLAVE_ED_STATUS_UNUSED)
106 {
107 transfer_request -> ux_slave_transfer_request_status = UX_TRANSFER_BUS_RESET;
108 UX_RESTORE
109 return(UX_STATE_EXIT);
110 }
111
112 /* For control endpoint, always go to next state. */
113 if(ed -> ux_sim_slave_ed_index == 0)
114 {
115 UX_RESTORE
116 return(UX_STATE_NEXT);
117 }
118
119 /* ED stalled. */
120 if (ed_status & UX_DCD_SIM_SLAVE_ED_STATUS_STALLED)
121 {
122 ed -> ux_sim_slave_ed_status = UX_DCD_SIM_SLAVE_ED_STATUS_USED;
123 transfer_request -> ux_slave_transfer_request_status = UX_TRANSFER_STALLED;
124 UX_RESTORE
125 return(UX_STATE_NEXT);
126 }
127
128 /* Transfer started. */
129 if (ed_status & UX_DCD_SIM_SLAVE_ED_STATUS_TRANSFER)
130 {
131 if (ed_status & UX_DCD_SIM_SLAVE_ED_STATUS_DONE)
132 {
133 ed -> ux_sim_slave_ed_status = UX_DCD_SIM_SLAVE_ED_STATUS_USED;
134 UX_RESTORE
135 return(UX_STATE_NEXT);
136 }
137 UX_RESTORE
138 return(UX_STATE_WAIT);
139 }
140
141 /* Start transfer. */
142 ed->ux_sim_slave_ed_status |= UX_DCD_SIM_SLAVE_ED_STATUS_TRANSFER;
143 UX_RESTORE
144 return(UX_STATE_WAIT);
145
146 }
147 #endif
148
