KernelLand/Modules/USB/Core/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         req.ReqType = Type;
  29         req.Request = Req;
  30         req.Value = LittleEndian16( Val );
  31         req.Index = LittleEndian16( Indx );
  32         req.Length = LittleEndian16( Len );
  33
  34         hdl = Host->HostDef->SendSETUP(Host->Ptr, Addr, EndPt, 0, NULL, NULL, &req, sizeof(req));
  35
  36         // TODO: Data toggle?
  37         // TODO: Multi-packet transfers
  38         if( Type & 0x80 )
  39         {
  40                 void    *hdl2;
  41
  42                 hdl = Host->HostDef->SendIN(Host->Ptr, Addr, EndPt, 0, NULL, NULL, Data, Len);
  43
  44                 hdl2 = Host->HostDef->SendOUT(Host->Ptr, Addr, EndPt, 0, NULL, NULL, NULL, 0);
  45                 while( Host->HostDef->IsOpComplete(Host->Ptr, hdl2) == 0 )
  46                         Time_Delay(1);
  47         }
  48         else
  49         {
  50                 void    *hdl2;
  51
  52                 if( Len > 0 )
  53                         hdl = Host->HostDef->SendOUT(Host->Ptr, Addr, EndPt, 0, NULL, NULL, Data, Len);
  54                 else
  55                         hdl = NULL;
  56
  57                 // Status phase (DataToggle=1)
  58                 hdl2 = Host->HostDef->SendIN(Host->Ptr, Addr, EndPt, 1, NULL, NULL, NULL, 0);
  59                 while( Host->HostDef->IsOpComplete(Host->Ptr, hdl2) == 0 )
  60                         Time_Delay(1);
  61         }
  62         return hdl;
  63 }
  64
  65 int USB_int_SendSetupSetAddress(tUSBHost *Host, int Address)
  66 {
  67         USB_int_Request(Host, 0, 0, 0x00, 5, Address & 0x7F, 0, 0, NULL);
  68         return 0;
  69 }
  70
  71 int USB_int_ReadDescriptor(tUSBDevice *Dev, int Endpoint, int Type, int Index, int Length, void *Dest)
  72 {
  73         const int       ciMaxPacketSize = 0x400;
  74         struct sDeviceRequest   req;
  75          int    bToggle = 0;
  76         void    *final;
  77
  78         req.ReqType = 0x80;
  79         switch( Type & 0xF00 )
  80         {
  81         case 0x000:     req.ReqType |= (0 << 5);        break;  // Standard
  82         case 0x100:     req.ReqType |= (1 << 5);        break;  // Class
  83         case 0x200:     req.ReqType |= (2 << 5);        break;  // Vendor
  84         }
  85
  86         req.Request = 6;        // GET_DESCRIPTOR
  87         req.Value = LittleEndian16( ((Type & 0xFF) << 8) | (Index & 0xFF) );
  88         req.Index = LittleEndian16( 0 );        // TODO: Language ID
  89         req.Length = LittleEndian16( Length );
  90
  91         Dev->Host->HostDef->SendSETUP(
  92                 Dev->Host->Ptr, Dev->Address, Endpoint,
  93                 0, NULL, NULL,
  94                 &req, sizeof(req)
  95                 );
  96
  97         bToggle = 1;
  98         while( Length > ciMaxPacketSize )
  99         {
 100                 Dev->Host->HostDef->SendIN(
 101                         Dev->Host->Ptr, Dev->Address, Endpoint,
 102                         bToggle, NULL, NULL,
 103                         Dest, ciMaxPacketSize
 104                         );
 105                 bToggle = !bToggle;
 106                 Length -= ciMaxPacketSize;
 107         }
 108
 109         final = Dev->Host->HostDef->SendIN(
 110                 Dev->Host->Ptr, Dev->Address, Endpoint,
 111                 bToggle, INVLPTR, NULL,
 112                 Dest, Length
 113                 );
 114
 115         while( Dev->Host->HostDef->IsOpComplete(Dev->Host->Ptr, final) == 0 )
 116                 Threads_Yield();
 117
 118         return 0;
 119 }
 120
 121 char *USB_int_GetDeviceString(tUSBDevice *Dev, int Endpoint, int Index)
 122 {
 123         struct sDescriptor_String       str;
 124          int    src_len, new_len;
 125         char    *ret;
 126
 127         if(Index == 0)  return strdup("");
 128
 129         USB_int_ReadDescriptor(Dev, Endpoint, 3, Index, sizeof(str), &str);
 130         if(str.Length < 2) {
 131                 Log_Error("USB", "String %p:%i:%i:%i descriptor is undersized (%i)",
 132                         Dev->Host, Dev->Address, Endpoint, Index, str.Length);
 133                 return NULL;
 134         }
 135 //      if(str.Length > sizeof(str)) {
 136 //              // IMPOSSIBLE!
 137 //              Log_Error("USB", "String is %i bytes, which is over prealloc size (%i)",
 138 //                      str.Length, sizeof(str)
 139 //                      );
 140 //      }
 141         src_len = (str.Length - 2) / sizeof(str.Data[0]);
 142
 143         LOG("&str = %p, src_len = %i", &str, src_len);
 144
 145         new_len = _UTF16to8(str.Data, src_len, NULL);
 146         ret = malloc( new_len + 1 );
 147         _UTF16to8(str.Data, src_len, ret);
 148         ret[new_len] = 0;
 149         return ret;
 150 }
 151
 152 int _UTF16to8(Uint16 *Input, int InputLen, char *Dest)
 153 {
 154          int    str_len, cp_len;
 155         Uint32  saved_bits = 0;
 156         str_len = 0;
 157         for( int i = 0; i < InputLen; i ++)
 158         {
 159                 Uint32  cp;
 160                 Uint16  val = Input[i];
 161                 if( val >= 0xD800 && val <= 0xDBFF )
 162                 {
 163                         // Multibyte - Leading
 164                         if(i + 1 > InputLen) {
 165                                 cp = '?';
 166                         }
 167                         else {
 168                                 saved_bits = (val - 0xD800) << 10;
 169                                 saved_bits += 0x10000;
 170                                 continue ;
 171                         }
 172                 }
 173                 else if( val >= 0xDC00 && val <= 0xDFFF )
 174                 {
 175                         if( !saved_bits ) {
 176                                 cp = '?';
 177                         }
 178                         else {
 179                                 saved_bits |= (val - 0xDC00);
 180                                 cp = saved_bits;
 181                         }
 182                 }
 183                 else
 184                         cp = val;
 185
 186                 cp_len = WriteUTF8((Uint8*)Dest, cp);
 187                 if(Dest)
 188                         Dest += cp_len;
 189                 str_len += cp_len;
 190
 191                 saved_bits = 0;
 192         }
 193
 194         return str_len;
 195 }
 196