Add descriptor class, subclass and protocol constants to the class drivers, modify...
[pub/USBasp.git] / LUFA / Drivers / USB / Class / Host / MIDI.c
1 /*
2 LUFA Library
3 Copyright (C) Dean Camera, 2010.
4
5 dean [at] fourwalledcubicle [dot] com
6 www.fourwalledcubicle.com
7 */
8
9 /*
10 Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
11
12 Permission to use, copy, modify, distribute, and sell this
13 software and its documentation for any purpose is hereby granted
14 without fee, provided that the above copyright notice appear in
15 all copies and that both that the copyright notice and this
16 permission notice and warranty disclaimer appear in supporting
17 documentation, and that the name of the author not be used in
18 advertising or publicity pertaining to distribution of the
19 software without specific, written prior permission.
20
21 The author disclaim all warranties with regard to this
22 software, including all implied warranties of merchantability
23 and fitness. In no event shall the author be liable for any
24 special, indirect or consequential damages or any damages
25 whatsoever resulting from loss of use, data or profits, whether
26 in an action of contract, negligence or other tortious action,
27 arising out of or in connection with the use or performance of
28 this software.
29 */
30
31 #define __INCLUDE_FROM_USB_DRIVER
32 #include "../../HighLevel/USBMode.h"
33 #if defined(USB_CAN_BE_HOST)
34
35 #define __INCLUDE_FROM_MIDI_DRIVER
36 #define __INCLUDE_FROM_MIDI_HOST_C
37 #include "MIDI.h"
38
39 uint8_t MIDI_Host_ConfigurePipes(USB_ClassInfo_MIDI_Host_t* const MIDIInterfaceInfo,
40 uint16_t ConfigDescriptorSize,
41 void* ConfigDescriptorData)
42 {
43 USB_Descriptor_Endpoint_t* DataINEndpoint = NULL;
44 USB_Descriptor_Endpoint_t* DataOUTEndpoint = NULL;
45 USB_Descriptor_Interface_t* MIDIInterface = NULL;
46
47 memset(&MIDIInterfaceInfo->State, 0x00, sizeof(MIDIInterfaceInfo->State));
48
49 if (DESCRIPTOR_TYPE(ConfigDescriptorData) != DTYPE_Configuration)
50 return MIDI_ENUMERROR_InvalidConfigDescriptor;
51
52 while (!(DataINEndpoint) || !(DataOUTEndpoint))
53 {
54 if (!(MIDIInterface) ||
55 USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
56 DCOMP_MIDI_Host_NextMIDIStreamingDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
57 {
58 if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
59 DCOMP_MIDI_Host_NextMIDIStreamingInterface) != DESCRIPTOR_SEARCH_COMP_Found)
60 {
61 return MIDI_ENUMERROR_NoCompatibleInterfaceFound;
62 }
63
64 MIDIInterface = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Interface_t);
65
66 DataINEndpoint = NULL;
67 DataOUTEndpoint = NULL;
68
69 continue;
70 }
71
72 USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Endpoint_t);
73
74 if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
75 DataINEndpoint = EndpointData;
76 else
77 DataOUTEndpoint = EndpointData;
78 }
79
80 for (uint8_t PipeNum = 1; PipeNum < PIPE_TOTAL_PIPES; PipeNum++)
81 {
82 if (PipeNum == MIDIInterfaceInfo->Config.DataINPipeNumber)
83 {
84 Pipe_ConfigurePipe(PipeNum, EP_TYPE_BULK, PIPE_TOKEN_IN,
85 DataINEndpoint->EndpointAddress, DataINEndpoint->EndpointSize,
86 MIDIInterfaceInfo->Config.DataINPipeDoubleBank ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE);
87
88 MIDIInterfaceInfo->State.DataINPipeSize = DataINEndpoint->EndpointSize;
89 }
90 else if (PipeNum == MIDIInterfaceInfo->Config.DataOUTPipeNumber)
91 {
92 Pipe_ConfigurePipe(PipeNum, EP_TYPE_BULK, PIPE_TOKEN_OUT,
93 DataOUTEndpoint->EndpointAddress, DataOUTEndpoint->EndpointSize,
94 MIDIInterfaceInfo->Config.DataOUTPipeDoubleBank ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE);
95
96 MIDIInterfaceInfo->State.DataOUTPipeSize = DataOUTEndpoint->EndpointSize;
97 }
98 }
99
100 MIDIInterfaceInfo->State.InterfaceNumber = MIDIInterface->InterfaceNumber;
101 MIDIInterfaceInfo->State.IsActive = true;
102
103 return MIDI_ENUMERROR_NoError;
104 }
105
106 static uint8_t DCOMP_MIDI_Host_NextMIDIStreamingInterface(void* const CurrentDescriptor)
107 {
108 if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
109 {
110 USB_Descriptor_Interface_t* CurrentInterface = DESCRIPTOR_PCAST(CurrentDescriptor,
111 USB_Descriptor_Interface_t);
112
113 if ((CurrentInterface->Class == AUDIO_CSCP_AudioClass) &&
114 (CurrentInterface->SubClass == AUDIO_CSCP_MIDIStreamingSubclass) &&
115 (CurrentInterface->Protocol == AUDIO_CSCP_StreamingProtocol))
116 {
117 return DESCRIPTOR_SEARCH_Found;
118 }
119 }
120
121 return DESCRIPTOR_SEARCH_NotFound;
122 }
123
124 static uint8_t DCOMP_MIDI_Host_NextMIDIStreamingDataEndpoint(void* const CurrentDescriptor)
125 {
126 if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Endpoint)
127 {
128 USB_Descriptor_Endpoint_t* CurrentEndpoint = DESCRIPTOR_PCAST(CurrentDescriptor,
129 USB_Descriptor_Endpoint_t);
130
131 uint8_t EndpointType = (CurrentEndpoint->Attributes & EP_TYPE_MASK);
132
133 if ((EndpointType == EP_TYPE_BULK) && !(Pipe_IsEndpointBound(CurrentEndpoint->EndpointAddress)))
134 return DESCRIPTOR_SEARCH_Found;
135 }
136 else if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
137 {
138 return DESCRIPTOR_SEARCH_Fail;
139 }
140
141 return DESCRIPTOR_SEARCH_NotFound;
142 }
143
144 uint8_t MIDI_Host_Flush(USB_ClassInfo_MIDI_Host_t* const MIDIInterfaceInfo)
145 {
146 if ((USB_HostState != HOST_STATE_Configured) || !(MIDIInterfaceInfo->State.IsActive))
147 return PIPE_RWSTREAM_DeviceDisconnected;
148
149 uint8_t ErrorCode;
150
151 Pipe_SelectPipe(MIDIInterfaceInfo->Config.DataOUTPipeNumber);
152
153 if (Pipe_BytesInPipe())
154 {
155 Pipe_ClearOUT();
156
157 if ((ErrorCode = Pipe_WaitUntilReady()) != PIPE_READYWAIT_NoError)
158 return ErrorCode;
159 }
160
161 return PIPE_READYWAIT_NoError;
162 }
163
164 uint8_t MIDI_Host_SendEventPacket(USB_ClassInfo_MIDI_Host_t* const MIDIInterfaceInfo,
165 MIDI_EventPacket_t* const Event)
166 {
167 if ((USB_HostState != HOST_STATE_Configured) || !(MIDIInterfaceInfo->State.IsActive))
168 return HOST_SENDCONTROL_DeviceDisconnected;
169
170 Pipe_SelectPipe(MIDIInterfaceInfo->Config.DataOUTPipeNumber);
171
172 if (Pipe_IsReadWriteAllowed())
173 {
174 uint8_t ErrorCode;
175
176 if ((ErrorCode = Pipe_Write_Stream_LE(Event, sizeof(MIDI_EventPacket_t), NO_STREAM_CALLBACK)) != PIPE_RWSTREAM_NoError)
177 return ErrorCode;
178
179 if (!(Pipe_IsReadWriteAllowed()))
180 Pipe_ClearOUT();
181 }
182
183 return PIPE_RWSTREAM_NoError;
184 }
185
186 bool MIDI_Host_ReceiveEventPacket(USB_ClassInfo_MIDI_Host_t* const MIDIInterfaceInfo,
187 MIDI_EventPacket_t* const Event)
188 {
189 if ((USB_HostState != HOST_STATE_Configured) || !(MIDIInterfaceInfo->State.IsActive))
190 return HOST_SENDCONTROL_DeviceDisconnected;
191
192 Pipe_SelectPipe(MIDIInterfaceInfo->Config.DataINPipeNumber);
193
194 if (!(Pipe_IsReadWriteAllowed()))
195 return false;
196
197 Pipe_Read_Stream_LE(Event, sizeof(MIDI_EventPacket_t), NO_STREAM_CALLBACK);
198
199 if (!(Pipe_IsReadWriteAllowed()))
200 Pipe_ClearIN();
201
202 return true;
203 }
204
205 #endif
206