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 /** Asix Class */
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_host_class_asix.h"
30 #include "ux_host_stack.h"
31
32
33 /**************************************************************************/
34 /* */
35 /* FUNCTION RELEASE */
36 /* */
37 /* _ux_host_class_asix_reception_callback PORTABLE C */
38 /* 6.2.0 */
39 /* AUTHOR */
40 /* */
41 /* Chaoqiong Xiao, Microsoft Corporation */
42 /* */
43 /* DESCRIPTION */
44 /* */
45 /* This function is the callback from the USBX transfer functions, */
46 /* it is called when a full or partial transfer has been done for a */
47 /* bulk in transfer. It calls back the application. */
48 /* */
49 /* It's deprecated. */
50 /* */
51 /* INPUT */
52 /* */
53 /* transfer_request Pointer to transfer request */
54 /* */
55 /* OUTPUT */
56 /* */
57 /* None */
58 /* */
59 /* CALLS */
60 /* */
61 /* _ux_host_stack_transfer_request Process transfer request */
62 /* _ux_utility_short_get_big_endian Get 16-bit big endian */
63 /* _ux_network_driver_packet_received Process received packet */
64 /* nx_packet_transmit_release Release NetX packet */
65 /* nx_packet_allocate Allocate NetX packet */
66 /* */
67 /* CALLED BY */
68 /* */
69 /* Application */
70 /* */
71 /* RELEASE HISTORY */
72 /* */
73 /* DATE NAME DESCRIPTION */
74 /* */
75 /* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */
76 /* 09-30-2020 Chaoqiong Xiao Modified comment(s), */
77 /* resulting in version 6.1 */
78 /* 04-25-2022 Chaoqiong Xiao Modified comment(s), */
79 /* fixed standalone compile, */
80 /* resulting in version 6.1.11 */
81 /* 10-31-2022 Chaoqiong Xiao Modified comment(s), */
82 /* deprecated, no RX callback, */
83 /* modified pool reference, */
84 /* resulting in version 6.2.0 */
85 /* */
86 /**************************************************************************/
_ux_host_class_asix_reception_callback(UX_TRANSFER * transfer_request)87 VOID _ux_host_class_asix_reception_callback (UX_TRANSFER *transfer_request)
88 {
89 #if defined(UX_HOST_STANDALONE)
90 UX_PARAMETER_NOT_USED(transfer_request);
91 #else
92
93 UX_HOST_CLASS_ASIX *asix;
94 NX_PACKET *packet;
95 ULONG ip_given_length;
96 UINT status;
97
98 /* Get the class instance for this transfer request. */
99 asix = (UX_HOST_CLASS_ASIX *) transfer_request -> ux_transfer_request_class_instance;
100
101 /* Load the packet that is associated with this reception. */
102 packet = transfer_request -> ux_transfer_request_user_specific;
103
104 /* Check the state of the transfer. If there is an error, we do not proceed with this report. */
105 if (transfer_request -> ux_transfer_request_completion_code == UX_SUCCESS)
106 {
107
108 /* Adjust the prepend, length, append fields to take the Ether header out */
109 packet -> nx_packet_prepend_ptr += 4;
110 packet -> nx_packet_length = transfer_request -> ux_transfer_request_actual_length - 4;
111 packet -> nx_packet_append_ptr =
112 packet->nx_packet_prepend_ptr + transfer_request -> ux_transfer_request_actual_length ;
113
114 /* Calculate the accurate packet length from ip header */
115 if((*(packet -> nx_packet_prepend_ptr + 12) == 0x08) &&
116 (*(packet -> nx_packet_prepend_ptr + 13) == 0))
117 {
118 ip_given_length = _ux_utility_short_get_big_endian(packet -> nx_packet_prepend_ptr + 16) + UX_HOST_CLASS_ASIX_ETHERNET_SIZE;
119 packet->nx_packet_length = ip_given_length ;
120 packet->nx_packet_append_ptr = packet->nx_packet_prepend_ptr + ip_given_length;
121 }
122
123 /* Send that packet to the NetX USB broker. */
124 _ux_network_driver_packet_received(asix -> ux_host_class_asix_network_handle, packet);
125
126 }
127
128 else
129
130 /* Free the packet that was not successfully received. */
131 nx_packet_transmit_release(packet);
132
133 /* We can accept new reception. Get a NX Packet */
134 if (nx_packet_allocate(asix -> ux_host_class_asix_packet_pool, &packet,
135 NX_RECEIVE_PACKET, NX_NO_WAIT) == NX_SUCCESS)
136 {
137
138 /* Adjust the prepend pointer to take into account the non 3 bit alignment of the ethernet header. */
139 packet -> nx_packet_prepend_ptr += sizeof(USHORT);
140
141 /* Set the data pointer. */
142 transfer_request -> ux_transfer_request_data_pointer = packet -> nx_packet_prepend_ptr;
143
144 /* And length. */
145 transfer_request -> ux_transfer_request_requested_length = UX_HOST_CLASS_ASIX_NX_PAYLOAD_SIZE;
146 transfer_request -> ux_transfer_request_actual_length = 0;
147
148 /* Store the packet that owns this transaction. */
149 transfer_request -> ux_transfer_request_user_specific = packet;
150
151 /* Memorize this packet at the beginning of the queue. */
152 asix -> ux_host_class_asix_receive_queue = packet;
153
154 /* Reset the queue pointer of this packet. */
155 packet -> nx_packet_queue_next = UX_NULL;
156
157 /* Ask USB to schedule a reception. */
158 status = _ux_host_stack_transfer_request(transfer_request);
159
160 /* Check if the transaction was armed successfully. We do not wait for the packet to be sent here. */
161 if (status != UX_SUCCESS)
162 {
163
164 /* Cancel the packet. */
165 asix -> ux_host_class_asix_receive_queue = UX_NULL;
166
167 }
168 }
169 /* There is no status to be reported back to the stack. */
170 return;
171 #endif
172 }
173
