usb_lowlevel.c

   1 /*
   2  * Acess 2 USB Stack
   3  * - By John Hodge (thePowersGang)
   4  *
   5  * usb_lowlevel.c
   6  * - Low Level IO
   7  */
   8 #define DEBUG   1
   9 #include <acess.h>
  10 #include "usb.h"
  11 #include "usb_proto.h"
  12 #include "usb_lowlevel.h"
  13 #include <timers.h>
  14
  15 // === PROTOTYPES ===
  16 void    *USB_int_Request(tUSBHost *Host, int Addr, int EndPt, int Type, int Req, int Val, int Indx, int Len, void *Data);
  17  int    USB_int_SendSetupSetAddress(tUSBHost *Host, int Address);
  18  int    USB_int_ReadDescriptor(tUSBDevice *Dev, int Endpoint, int Type, int Index, int Length, void *Dest);
  19 char    *USB_int_GetDeviceString(tUSBDevice *Dev, int Endpoint, int Index);
  20  int    _UTF16to8(Uint16 *Input, int InputLen, char *Dest);
  21
  22 // === CODE ===
  23 void *USB_int_Request(tUSBHost *Host, int Addr, int EndPt, int Type, int Req, int Val, int Indx, int Len, void *Data)
  24 {
  25         void    *hdl;
  26         // TODO: Sanity check (and check that Type is valid)
  27         struct sDeviceRequest   req;
  28          int    dest = Addr * 16 + EndPt;       // TODO: Validate
  29
  30         ENTER("pHost xdest iType iReq iVal iIndx iLen pData",
  31                 Host, dest, Type, Req, Val, Indx, Len, Data);
  32
  33         req.ReqType = Type;
  34         req.Request = Req;
  35         req.Value = LittleEndian16( Val );
  36         req.Index = LittleEndian16( Indx );
  37         req.Length = LittleEndian16( Len );
  38
  39         LOG("SETUP");
  40         hdl = Host->HostDef->SendSETUP(Host->Ptr, dest, 0, NULL, NULL, &req, sizeof(req));
  41
  42         // TODO: Data toggle?
  43         // TODO: Multi-packet transfers
  44         if( Type & 0x80 )
  45         {
  46                 void    *hdl2;
  47
  48                 LOG("IN");
  49                 hdl = Host->HostDef->SendIN(Host->Ptr, dest, 0, NULL, NULL, Data, Len);
  50
  51                 LOG("OUT (Done)");
  52                 hdl2 = Host->HostDef->SendOUT(Host->Ptr, dest, 0, INVLPTR, NULL, NULL, 0);
  53                 LOG("Wait...");
  54                 while( Host->HostDef->IsOpComplete(Host->Ptr, hdl2) == 0 )
  55                         Time_Delay(1);
  56         }
  57         else
  58         {
  59                 void    *hdl2;
  60
  61                 LOG("OUT");
  62                 if( Len > 0 )
  63                         hdl = Host->HostDef->SendOUT(Host->Ptr, dest, 0, NULL, NULL, Data, Len);
  64                 else
  65                         hdl = NULL;
  66
  67                 LOG("IN (Status)");
  68                 // Status phase (DataToggle=1)
  69                 hdl2 = Host->HostDef->SendIN(Host->Ptr, dest, 1, INVLPTR, NULL, NULL, 0);
  70                 LOG("Wait...");
  71                 while( Host->HostDef->IsOpComplete(Host->Ptr, hdl2) == 0 )
  72                         Time_Delay(1);
  73         }
  74         LEAVE('p', hdl);
  75         return hdl;
  76 }
  77
  78 int USB_int_SendSetupSetAddress(tUSBHost *Host, int Address)
  79 {
  80         USB_int_Request(Host, 0, 0, 0x00, 5, Address & 0x7F, 0, 0, NULL);
  81         return 0;
  82 }
  83
  84 int USB_int_ReadDescriptor(tUSBDevice *Dev, int Endpoint, int Type, int Index, int Length, void *Dest)
  85 {
  86         const int       ciMaxPacketSize = 0x400;
  87         struct sDeviceRequest   req;
  88          int    bToggle = 0;
  89         void    *final;
  90          int    dest = Dev->Address*16 + Endpoint;
  91
  92         ENTER("pDev xdest iType iIndex iLength pDest",
  93                 Dev, dest, Type, Index, Length, Dest);
  94
  95         req.ReqType = 0x80;
  96         req.ReqType |= ((Type >> 8) & 0x3) << 5;        // Bits 5/6
  97         req.ReqType |= (Type >> 12) & 3;        // Destination (Device, Interface, Endpoint, Other);
  98
  99         req.Request = 6;        // GET_DESCRIPTOR
 100         req.Value = LittleEndian16( ((Type & 0xFF) << 8) | (Index & 0xFF) );
 101         req.Index = LittleEndian16( 0 );        // TODO: Language ID / Interface
 102         req.Length = LittleEndian16( Length );
 103
 104         LOG("SETUP");
 105         Dev->Host->HostDef->SendSETUP(
 106                 Dev->Host->Ptr, dest,
 107                 0, NULL, NULL,
 108                 &req, sizeof(req)
 109                 );
 110
 111         bToggle = 1;
 112         while( Length > ciMaxPacketSize )
 113         {
 114                 LOG("IN (%i rem)", Length - ciMaxPacketSize);
 115                 Dev->Host->HostDef->SendIN(
 116                         Dev->Host->Ptr, dest,
 117                         bToggle, NULL, NULL,
 118                         Dest, ciMaxPacketSize
 119                         );
 120                 bToggle = !bToggle;
 121                 Length -= ciMaxPacketSize;
 122         }
 123
 124         LOG("IN (final)");
 125         final = Dev->Host->HostDef->SendIN(
 126                 Dev->Host->Ptr, dest,
 127                 bToggle, INVLPTR, NULL,
 128                 Dest, Length
 129                 );
 130
 131         LOG("Waiting");
 132         while( Dev->Host->HostDef->IsOpComplete(Dev->Host->Ptr, final) == 0 )
 133                 Threads_Yield();        // BAD BAD BAD
 134
 135         LEAVE('i', 0);
 136         return 0;
 137 }
 138
 139 char *USB_int_GetDeviceString(tUSBDevice *Dev, int Endpoint, int Index)
 140 {
 141         struct sDescriptor_String       str;
 142          int    src_len, new_len;
 143         char    *ret;
 144
 145         if(Index == 0)  return strdup("");
 146
 147         USB_int_ReadDescriptor(Dev, Endpoint, 3, Index, sizeof(str), &str);
 148         if(str.Length < 2) {
 149                 Log_Error("USB", "String %p:%i:%i:%i descriptor is undersized (%i)",
 150                         Dev->Host, Dev->Address, Endpoint, Index, str.Length);
 151                 return NULL;
 152         }
 153 //      if(str.Length > sizeof(str)) {
 154 //              // IMPOSSIBLE!
 155 //              Log_Error("USB", "String is %i bytes, which is over prealloc size (%i)",
 156 //                      str.Length, sizeof(str)
 157 //                      );
 158 //      }
 159         src_len = (str.Length - 2) / sizeof(str.Data[0]);
 160
 161         LOG("&str = %p, src_len = %i", &str, src_len);
 162
 163         new_len = _UTF16to8(str.Data, src_len, NULL);
 164         ret = malloc( new_len + 1 );
 165         _UTF16to8(str.Data, src_len, ret);
 166         ret[new_len] = 0;
 167         return ret;
 168 }
 169
 170 int _UTF16to8(Uint16 *Input, int InputLen, char *Dest)
 171 {
 172          int    str_len, cp_len;
 173         Uint32  saved_bits = 0;
 174         str_len = 0;
 175         for( int i = 0; i < InputLen; i ++)
 176         {
 177                 Uint32  cp;
 178                 Uint16  val = Input[i];
 179                 if( val >= 0xD800 && val <= 0xDBFF )
 180                 {
 181                         // Multibyte - Leading
 182                         if(i + 1 > InputLen) {
 183                                 cp = '?';
 184                         }
 185                         else {
 186                                 saved_bits = (val - 0xD800) << 10;
 187                                 saved_bits += 0x10000;
 188                                 continue ;
 189                         }
 190                 }
 191                 else if( val >= 0xDC00 && val <= 0xDFFF )
 192                 {
 193                         if( !saved_bits ) {
 194                                 cp = '?';
 195                         }
 196                         else {
 197                                 saved_bits |= (val - 0xDC00);
 198                                 cp = saved_bits;
 199                         }
 200                 }
 201                 else
 202                         cp = val;
 203
 204                 cp_len = WriteUTF8((Uint8*)Dest, cp);
 205                 if(Dest)
 206                         Dest += cp_len;
 207                 str_len += cp_len;
 208
 209                 saved_bits = 0;
 210         }
 211
 212         return str_len;
 213 }
 214