MassStorage.c 7.36 KB
Newer Older
1
2
/*
             LUFA Library
3
     Copyright (C) Dean Camera, 2011.
4

5
  dean [at] fourwalledcubicle [dot] com
6
           www.lufa-lib.org
7
8
9
*/

/*
10
  Copyright 2011  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
17
18
  permission notice and warranty disclaimer appear in supporting
  documentation, and that the name of the author not be used in
  advertising or publicity pertaining to distribution of the
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
  software without specific, written prior permission.

  The author disclaim all warranties with regard to this
  software, including all implied warranties of merchantability
  and fitness.  In no event shall the author be liable for any
  special, indirect or consequential damages or any damages
  whatsoever resulting from loss of use, data or profits, whether
  in an action of contract, negligence or other tortious action,
  arising out of or in connection with the use or performance of
  this software.
*/

#define  __INCLUDE_FROM_USB_DRIVER
#include "../../HighLevel/USBMode.h"
#if defined(USB_CAN_BE_DEVICE)

#define  __INCLUDE_FROM_MS_DRIVER
36
#define  __INCLUDE_FROM_MASSSTORAGE_DEVICE_C
37
38
39
40
41
42
#include "MassStorage.h"

void MS_Device_ProcessControlRequest(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
{
	if (!(Endpoint_IsSETUPReceived()))
	  return;
43

44
45
46
47
48
	if (USB_ControlRequest.wIndex != MSInterfaceInfo->Config.InterfaceNumber)
	  return;

	switch (USB_ControlRequest.bRequest)
	{
49
		case MS_REQ_MassStorageReset:
50
51
52
53
			if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
			{
				Endpoint_ClearSETUP();
				Endpoint_ClearStatusStage();
54
55

				MSInterfaceInfo->State.IsMassStoreReset = true;
56
57
58
			}

			break;
59
		case MS_REQ_GetMaxLUN:
60
61
62
			if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
			{
				Endpoint_ClearSETUP();
63
64
				Endpoint_Write_Byte(MSInterfaceInfo->Config.TotalLUNs - 1);
				Endpoint_ClearIN();
65
66
				Endpoint_ClearStatusStage();
			}
67

68
69
70
71
72
73
74
75
			break;
	}
}

bool MS_Device_ConfigureEndpoints(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
{
	memset(&MSInterfaceInfo->State, 0x00, sizeof(MSInterfaceInfo->State));

76
	for (uint8_t EndpointNum = 1; EndpointNum < ENDPOINT_TOTAL_ENDPOINTS; EndpointNum++)
77
	{
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
		uint16_t Size;
		uint8_t  Type;
		uint8_t  Direction;
		bool     DoubleBanked;

		if (EndpointNum == MSInterfaceInfo->Config.DataINEndpointNumber)
		{
			Size         = MSInterfaceInfo->Config.DataINEndpointSize;
			Direction    = ENDPOINT_DIR_IN;
			Type         = EP_TYPE_BULK;
			DoubleBanked = MSInterfaceInfo->Config.DataINEndpointDoubleBank;
		}
		else if (EndpointNum == MSInterfaceInfo->Config.DataOUTEndpointNumber)
		{
			Size         = MSInterfaceInfo->Config.DataOUTEndpointSize;
			Direction    = ENDPOINT_DIR_OUT;
			Type         = EP_TYPE_BULK;
			DoubleBanked = MSInterfaceInfo->Config.DataOUTEndpointDoubleBank;
		}
		else
		{
			continue;
		}
101

102
		if (!(Endpoint_ConfigureEndpoint(EndpointNum, Type, Direction, Size,
103
		                                 DoubleBanked ? ENDPOINT_BANK_DOUBLE : ENDPOINT_BANK_SINGLE)))
104
105
106
		{
			return false;
		}
107
	}
108

109
110
111
112
113
114
115
116
117
	return true;
}

void MS_Device_USBTask(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
{
	if (USB_DeviceState != DEVICE_STATE_Configured)
	  return;

	Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataOUTEndpointNumber);
118

119
120
121
122
123
124
	if (Endpoint_IsReadWriteAllowed())
	{
		if (MS_Device_ReadInCommandBlock(MSInterfaceInfo))
		{
			if (MSInterfaceInfo->State.CommandBlock.Flags & MS_COMMAND_DIR_DATA_IN)
			  Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataINEndpointNumber);
125

126
			MSInterfaceInfo->State.CommandStatus.Status = CALLBACK_MS_Device_SCSICommandReceived(MSInterfaceInfo) ?
127
			                                               MS_SCSI_COMMAND_Pass : MS_SCSI_COMMAND_Fail;
128
129
130
131
			MSInterfaceInfo->State.CommandStatus.Signature           = MS_CSW_SIGNATURE;
			MSInterfaceInfo->State.CommandStatus.Tag                 = MSInterfaceInfo->State.CommandBlock.Tag;
			MSInterfaceInfo->State.CommandStatus.DataTransferResidue = MSInterfaceInfo->State.CommandBlock.DataTransferLength;

132
			if ((MSInterfaceInfo->State.CommandStatus.Status == MS_SCSI_COMMAND_Fail) &&
133
134
135
136
			    (MSInterfaceInfo->State.CommandStatus.DataTransferResidue))
			{
				Endpoint_StallTransaction();
			}
137

138
139
140
			MS_Device_ReturnCommandStatus(MSInterfaceInfo);
		}
	}
141

142
143
144
145
	if (MSInterfaceInfo->State.IsMassStoreReset)
	{
		Endpoint_ResetFIFO(MSInterfaceInfo->Config.DataOUTEndpointNumber);
		Endpoint_ResetFIFO(MSInterfaceInfo->Config.DataINEndpointNumber);
146

147
148
149
150
151
152
153
154
155
156
157
158
159
		Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataOUTEndpointNumber);
		Endpoint_ClearStall();
		Endpoint_ResetDataToggle();
		Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataINEndpointNumber);
		Endpoint_ClearStall();
		Endpoint_ResetDataToggle();

		MSInterfaceInfo->State.IsMassStoreReset = false;
	}
}

static bool MS_Device_ReadInCommandBlock(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
{
160
	uint16_t BytesProcessed;
161

162
163
164
165
166
167
	Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataOUTEndpointNumber);
	
	BytesProcessed = 0;
	while (Endpoint_Read_Stream_LE(&MSInterfaceInfo->State.CommandBlock,
	                               (sizeof(MS_CommandBlockWrapper_t) - 16), &BytesProcessed) ==
	                               ENDPOINT_RWSTREAM_IncompleteTransfer)
168
	{
169
170
		if (MSInterfaceInfo->State.IsMassStoreReset)
		  return false;
171
	}
172

173
174
175
176
177
178
179
180
181
	if ((MSInterfaceInfo->State.CommandBlock.Signature         != MS_CBW_SIGNATURE)                  ||
	    (MSInterfaceInfo->State.CommandBlock.LUN               >= MSInterfaceInfo->Config.TotalLUNs) ||
		(MSInterfaceInfo->State.CommandBlock.Flags              & 0x1F)                              ||
		(MSInterfaceInfo->State.CommandBlock.SCSICommandLength == 0)                                 ||
		(MSInterfaceInfo->State.CommandBlock.SCSICommandLength >  16))
	{
		Endpoint_StallTransaction();
		Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataINEndpointNumber);
		Endpoint_StallTransaction();
182

183
184
185
		return false;
	}

186
187
188
189
	BytesProcessed = 0;
	while (Endpoint_Read_Stream_LE(&MSInterfaceInfo->State.CommandBlock.SCSICommandData,
	                                MSInterfaceInfo->State.CommandBlock.SCSICommandLength, &BytesProcessed) ==
	                                ENDPOINT_RWSTREAM_IncompleteTransfer)
190
	{
191
192
		if (MSInterfaceInfo->State.IsMassStoreReset)
		  return false;
193
194
195
	}

	Endpoint_ClearOUT();
196

197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
	return true;
}

static void MS_Device_ReturnCommandStatus(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
{
	Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataOUTEndpointNumber);

	while (Endpoint_IsStalled())
	{
		#if !defined(INTERRUPT_CONTROL_ENDPOINT)
		USB_USBTask();
		#endif

		if (MSInterfaceInfo->State.IsMassStoreReset)
		  return;
	}

	Endpoint_SelectEndpoint(MSInterfaceInfo->Config.DataINEndpointNumber);

	while (Endpoint_IsStalled())
	{
		#if !defined(INTERRUPT_CONTROL_ENDPOINT)
		USB_USBTask();
		#endif
221

222
223
224
		if (MSInterfaceInfo->State.IsMassStoreReset)
		  return;
	}
225

226
227
228
229
	uint16_t BytesProcessed = 0;
	while (Endpoint_Write_Stream_LE(&MSInterfaceInfo->State.CommandStatus,
	                                sizeof(MS_CommandStatusWrapper_t), &BytesProcessed) ==
	                                ENDPOINT_RWSTREAM_IncompleteTransfer)
230
	{
231
232
233
234
		if (MSInterfaceInfo->State.IsMassStoreReset)
		  return;
	}
	
235
236
237
238
	Endpoint_ClearIN();
}

#endif