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_request_transfer PORTABLE C */ 38 /* 6.1 */ 39 /* AUTHOR */ 40 /* */ 41 /* Chaoqiong Xiao, Microsoft Corporation */ 42 /* */ 43 /* DESCRIPTION */ 44 /* */ 45 /* This function is the handler for all the transactions on the USB. */ 46 /* The transfer request passed as parameter contains the endpoint and */ 47 /* the device descriptors in addition to the type of transaction to */ 48 /* be executed. */ 49 /* */ 50 /* INPUT */ 51 /* */ 52 /* hcd_ohci Pointer to OHCI controller */ 53 /* transfer_request Pointer to transfer request */ 54 /* */ 55 /* OUTPUT */ 56 /* */ 57 /* Completion Status */ 58 /* */ 59 /* CALLS */ 60 /* */ 61 /* _ux_hcd_ohci_request_bulk_transfer Start bulk transfer */ 62 /* _ux_hcd_ohci_request_control_transfer Start control transfer */ 63 /* _ux_hcd_ohci_request_interrupt_transfer Start interrupt transfer */ 64 /* _ux_hcd_ohci_request_isochronous_transfer Start isochronous transfer*/ 65 /* */ 66 /* CALLED BY */ 67 /* */ 68 /* OHCI Controller Driver */ 69 /* */ 70 /* RELEASE HISTORY */ 71 /* */ 72 /* DATE NAME DESCRIPTION */ 73 /* */ 74 /* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */ 75 /* 09-30-2020 Chaoqiong Xiao Modified comment(s), */ 76 /* resulting in version 6.1 */ 77 /* */ 78 /**************************************************************************/ _ux_hcd_ohci_request_transfer(UX_HCD_OHCI * hcd_ohci,UX_TRANSFER * transfer_request)79UINT _ux_hcd_ohci_request_transfer(UX_HCD_OHCI *hcd_ohci, UX_TRANSFER *transfer_request) 80 { 81 82 UX_ENDPOINT *endpoint; 83 UINT status; 84 85 86 /* Get the pointer to the Endpoint. */ 87 endpoint = (UX_ENDPOINT *) transfer_request -> ux_transfer_request_endpoint; 88 89 /* We reset the actual length field of the transfer request as a safety measure. */ 90 transfer_request -> ux_transfer_request_actual_length = 0; 91 92 /* Isolate the endpoint type and route the transfer request. */ 93 switch ((endpoint -> ux_endpoint_descriptor.bmAttributes) & UX_MASK_ENDPOINT_TYPE) 94 { 95 96 case UX_CONTROL_ENDPOINT: 97 98 /* Control transfer. */ 99 status = _ux_hcd_ohci_request_control_transfer(hcd_ohci, transfer_request); 100 break; 101 102 103 case UX_BULK_ENDPOINT: 104 105 /* Bulk transfer. */ 106 status = _ux_hcd_ohci_request_bulk_transfer(hcd_ohci, transfer_request); 107 break; 108 109 110 case UX_INTERRUPT_ENDPOINT: 111 112 /* Interrupt transfer. */ 113 status = _ux_hcd_ohci_request_interrupt_transfer(hcd_ohci, transfer_request); 114 break; 115 116 117 case UX_ISOCHRONOUS_ENDPOINT: 118 119 /* Isochronous transfer. */ 120 status = _ux_hcd_ohci_request_isochronous_transfer(hcd_ohci, transfer_request); 121 break; 122 123 } 124 125 /* Note that it is physically impossible to have a wrong endpoint type here 126 so no error checking! */ 127 128 /* Return completion status. */ 129 return(status); 130 } 131 132
