2 * Acess2 USB Stack Mass Storage Driver
3 * - By John Hodge (thePowersGang)
9 #define VERSION VER2(0,1)
13 #include "msc_proto.h"
16 int MSC_Initialise(char **Arguments);
17 void MSC_Cleanup(void);
18 void MSC_DeviceConnected(tUSBInterface *Dev, void *Descriptors, size_t DescriptorsLen);
19 void MSC_DataIn(tUSBInterface *Dev, int EndPt, int Length, void *Data);
20 // --- Internal Helpers
21 int MSC_int_CreateCBW(tMSC_CBW *Cbw, int bInput, size_t CmdLen, const void *CmdData, size_t DataLen);
22 void MSC_SendData(tUSBInterface *Dev, size_t CmdLen, const void *CmdData, size_t DataLen, const void *Data);
23 void MSC_RecvData(tUSBInterface *Dev, size_t CmdLen, const void *CmdData, size_t DataLen, void *Data);
26 MODULE_DEFINE(0, VERSION, USB_MSC, MSC_Initialise, MSC_Cleanup, "USB_Core", NULL);
27 tUSBDriver gMSC_Driver_BulkOnly = {
28 .Name = "MSC_BulkOnly",
29 .Match = {.Class = {0x080050, 0xFF00FF}},
30 .Connected = MSC_DeviceConnected,
40 int MSC_Initialise(char **Arguments)
42 USB_RegisterDriver( &gMSC_Driver_BulkOnly );
46 void MSC_Cleanup(void)
50 void MSC_DeviceConnected(tUSBInterface *Dev, void *Descriptors, size_t DescriptorsLen)
53 // TODO: Get the class code (and hence what command set is in use)
54 // TODO: Get the maximum packet size too
56 info = malloc( sizeof(*info) );
57 USB_SetDeviceDataPtr(Dev, info);
59 info->BlockCount = MSC_SCSI_GetSize(Dev, &info->BlockSize);
61 LVM_AddVolume(&gMSC_SCSI_VolType, "0", Dev, info->BlockSize, info->BlockCount);
64 void MSC_DataIn(tUSBInterface *Dev, int EndPt, int Length, void *Data)
66 // Will this ever be needed?
69 int MSC_int_CreateCBW(tMSC_CBW *Cbw, int bInput, size_t CmdLen, const void *CmdData, size_t DataLen)
72 Log_Error("MSC", "Zero length commands are invalid");
77 Log_Error("MSC", "Command data >16 bytes (%i)", CmdLen);
81 Cbw->dCBWSignature = LittleEndian32(0x43425355);
82 Cbw->dCBWTag = giMSC_NextTag ++;
83 Cbw->dCBWDataTransferLength = LittleEndian32(DataLen);
84 Cbw->bmCBWFlags = (bInput ? 0x80 : 0x00);
85 Cbw->bCBWLUN = 0; // TODO: Logical Unit Number (param from proto)
86 Cbw->bCBWLength = CmdLen;
87 memcpy(Cbw->CBWCB, CmdData, CmdLen);
92 void MSC_SendData(tUSBInterface *Dev, size_t CmdLen, const void *CmdData, size_t DataLen, const void *Data)
96 const int endpoint_out = 2;
97 const int endpoint_in = 1;
98 const int max_packet_size = 64;
100 if( MSC_int_CreateCBW(&cbw, 0, CmdLen, CmdData, DataLen) )
104 USB_SendData(Dev, endpoint_out, sizeof(cbw), &cbw);
107 for( size_t ofs = 0; ofs < DataLen; ofs += max_packet_size )
109 USB_SendData(Dev, endpoint_out, MIN(max_packet_size, DataLen - ofs), Data + ofs);
113 USB_RecvData(Dev, endpoint_in, sizeof(csw), &csw);
114 // TODO: Validate CSW
117 void MSC_RecvData(tUSBInterface *Dev, size_t CmdLen, const void *CmdData, size_t DataLen, void *Data)
121 const int endpoint_out = 2;
122 const int endpoint_in = 1;
123 const int max_packet_size = 64;
125 if( MSC_int_CreateCBW(&cbw, 1, CmdLen, CmdData, DataLen) )
129 USB_SendData(Dev, endpoint_out, sizeof(cbw), &cbw);
132 for( size_t ofs = 0; ofs < DataLen; ofs += max_packet_size )
134 // TODO: use async version and wait for the transaction to complete
135 USB_RecvData(Dev, endpoint_in, MIN(max_packet_size, DataLen - ofs), Data + ofs);
139 USB_RecvData(Dev, endpoint_in, sizeof(csw), &csw);
140 // TODO: Validate CSW