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 /** OHCI 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_ohci.h"
30 #include "ux_host_stack.h"
31
32
33 /**************************************************************************/
34 /* */
35 /* FUNCTION RELEASE */
36 /* */
37 /* _ux_hcd_ohci_port_enable PORTABLE C */
38 /* 6.1 */
39 /* AUTHOR */
40 /* */
41 /* Chaoqiong Xiao, Microsoft Corporation */
42 /* */
43 /* DESCRIPTION */
44 /* */
45 /* This function will enable a specific port attached to the root */
46 /* HUB. */
47 /* */
48 /* INPUT */
49 /* */
50 /* hcd_ohci Pointer to OHCI controller */
51 /* port_index Port index */
52 /* */
53 /* OUTPUT */
54 /* */
55 /* Completion Status */
56 /* */
57 /* CALLS */
58 /* */
59 /* _ux_hcd_ohci_register_read OHCI register read */
60 /* _ux_hcd_ohci_register_write OHCI register write */
61 /* _ux_utility_delay_ms Delay */
62 /* */
63 /* CALLED BY */
64 /* */
65 /* OHCI Controller Driver */
66 /* */
67 /* RELEASE HISTORY */
68 /* */
69 /* DATE NAME DESCRIPTION */
70 /* */
71 /* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */
72 /* 09-30-2020 Chaoqiong Xiao Modified comment(s), */
73 /* resulting in version 6.1 */
74 /* */
75 /**************************************************************************/
_ux_hcd_ohci_port_enable(UX_HCD_OHCI * hcd_ohci,ULONG port_index)76 UINT _ux_hcd_ohci_port_enable(UX_HCD_OHCI *hcd_ohci, ULONG port_index)
77 {
78
79 ULONG ohci_register_port_status;
80
81
82 /* Check to see if this port is valid on this controller. */
83 if (hcd_ohci -> ux_hcd_ohci_nb_root_hubs < port_index)
84 {
85
86 /* Error trap. */
87 _ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_HCD, UX_PORT_INDEX_UNKNOWN);
88
89 /* If trace is enabled, insert this event into the trace buffer. */
90 UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_PORT_INDEX_UNKNOWN, port_index, 0, 0, UX_TRACE_ERRORS, 0, 0)
91
92 return(UX_PORT_INDEX_UNKNOWN);
93 }
94
95 /* Ensure that the downstream port has a device attached. It is unnatural
96 to perform a port enable if there is no device. */
97 ohci_register_port_status = _ux_hcd_ohci_register_read(hcd_ohci, OHCI_HC_RH_PORT_STATUS + port_index);
98
99 /* Check Device Connection Status. */
100 if ((ohci_register_port_status & OHCI_HC_PS_CCS) == 0)
101 {
102
103 /* Error trap. */
104 _ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_HCD, UX_NO_DEVICE_CONNECTED);
105
106 /* If trace is enabled, insert this event into the trace buffer. */
107 UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_NO_DEVICE_CONNECTED, port_index, 0, 0, UX_TRACE_ERRORS, 0, 0)
108
109 return(UX_NO_DEVICE_CONNECTED);
110 }
111
112 /* Wait 50ms before we issue the command, otherwise some device do not answer! */
113 _ux_utility_delay_ms(UX_PORT_ENABLE_WAIT);
114
115 /* Write the command PES to this port. */
116 _ux_hcd_ohci_register_write(hcd_ohci, OHCI_HC_RH_PORT_STATUS + port_index, OHCI_HC_PS_PES);
117
118 /* Return successful completion. */
119 return(UX_SUCCESS);
120 }
121
122
