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 /**************************************************************************/
32 /* */
33 /* FUNCTION RELEASE */
34 /* */
35 /* _ux_dcd_sim_slave_endpoint_create PORTABLE C */
36 /* 6.1.6 */
37 /* AUTHOR */
38 /* */
39 /* Chaoqiong Xiao, Microsoft Corporation */
40 /* */
41 /* DESCRIPTION */
42 /* */
43 /* This function will create a physical endpoint. */
44 /* */
45 /* INPUT */
46 /* */
47 /* dcd_sim_slave Pointer to device controller */
48 /* endpoint Pointer to endpoint container */
49 /* */
50 /* OUTPUT */
51 /* */
52 /* Completion Status */
53 /* */
54 /* CALLS */
55 /* */
56 /* None */
57 /* */
58 /* CALLED BY */
59 /* */
60 /* Slave Simulator Controller Driver */
61 /* */
62 /* RELEASE HISTORY */
63 /* */
64 /* DATE NAME DESCRIPTION */
65 /* */
66 /* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */
67 /* 09-30-2020 Chaoqiong Xiao Modified comment(s), */
68 /* resulting in version 6.1 */
69 /* 04-02-2021 Chaoqiong Xiao Modified comment(s), */
70 /* supported bi-dir-endpoints, */
71 /* resulting in version 6.1.6 */
72 /* */
73 /**************************************************************************/
_ux_dcd_sim_slave_endpoint_create(UX_DCD_SIM_SLAVE * dcd_sim_slave,UX_SLAVE_ENDPOINT * endpoint)74 UINT _ux_dcd_sim_slave_endpoint_create(UX_DCD_SIM_SLAVE *dcd_sim_slave, UX_SLAVE_ENDPOINT *endpoint)
75 {
76
77 UX_DCD_SIM_SLAVE_ED *ed;
78 ULONG sim_slave_endpoint_index;
79
80
81 /* The simulator slave controller has 16 endpoints maximum. Endpoint 0 is always control.
82 The other endpoints are generic. We can use the endpoint number as an index. */
83 sim_slave_endpoint_index = endpoint ->ux_slave_endpoint_descriptor.bEndpointAddress & ~(ULONG)UX_ENDPOINT_DIRECTION;
84
85 /* Fetch the address of the physical endpoint. */
86 #ifdef UX_DEVICE_BIDIRECTIONAL_ENDPOINT_SUPPORT
87 ed = ((endpoint -> ux_slave_endpoint_descriptor.bEndpointAddress == 0) ?
88 &dcd_sim_slave -> ux_dcd_sim_slave_ed[0] :
89 ((endpoint -> ux_slave_endpoint_descriptor.bEndpointAddress & UX_ENDPOINT_DIRECTION) ?
90 &dcd_sim_slave -> ux_dcd_sim_slave_ed_in[sim_slave_endpoint_index] :
91 &dcd_sim_slave -> ux_dcd_sim_slave_ed[sim_slave_endpoint_index]));
92 #else
93 ed = &dcd_sim_slave -> ux_dcd_sim_slave_ed[sim_slave_endpoint_index];
94 #endif
95
96 /* Check the endpoint status, if it is free, reserve it. If not reject this endpoint. */
97 if ((ed -> ux_sim_slave_ed_status & UX_DCD_SIM_SLAVE_ED_STATUS_USED) == 0)
98 {
99
100 /* We can use this endpoint. */
101 ed -> ux_sim_slave_ed_status |= UX_DCD_SIM_SLAVE_ED_STATUS_USED;
102
103 /* Keep the physical endpoint address in the endpoint container. */
104 endpoint -> ux_slave_endpoint_ed = (VOID *) ed;
105
106 /* And its mask. */
107 ed -> ux_sim_slave_ed_index = sim_slave_endpoint_index;
108
109 /* Save the endpoint pointer. */
110 ed -> ux_sim_slave_ed_endpoint = endpoint;
111
112 /* If this is endpoint 0, it is always ready for transactions. */
113 if ( sim_slave_endpoint_index == 0)
114 ed -> ux_sim_slave_ed_status |= UX_DCD_SIM_SLAVE_ED_STATUS_TRANSFER;
115
116 /* Enable this endpoint. */
117 return(UX_SUCCESS);
118 }
119
120 /* Notify application. */
121 _ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_DCD, UX_MEMORY_INSUFFICIENT);
122
123 /* Return error to caller. */
124 return(UX_NO_ED_AVAILABLE);
125 }
126
127
