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
  14 // === PROTOTYPES ===
  15 void    *USB_int_Request(tUSBHost *Host, int Addr, int EndPt, int Type, int Req, int Val, int Indx, int Len, void *Data);
  16  int    USB_int_SendSetupSetAddress(tUSBHost *Host, int Address);
  17  int    USB_int_ReadDescriptor(tUSBDevice *Dev, int Endpoint, int Type, int Index, int Length, void *Dest);
  18 char    *USB_int_GetDeviceString(tUSBDevice *Dev, int Endpoint, int Index);
  19  int    _UTF16to8(Uint16 *Input, int InputLen, char *Dest);
  20
  21 // === CODE ===
  22 void *USB_int_Request(tUSBHost *Host, int Addr, int EndPt, int Type, int Req, int Val, int Indx, int Len, void *Data)
  23 {
  24         void    *hdl;
  25         // TODO: Sanity check (and check that Type is valid)
  26         struct sDeviceRequest   req;
  27         req.ReqType = Type;
  28         req.Request = Req;
  29         req.Value = LittleEndian16( Val );
  30         req.Index = LittleEndian16( Indx );
  31         req.Length = LittleEndian16( Len );
  32
  33         hdl = Host->HostDef->SendSETUP(Host->Ptr, Addr, EndPt, 0, NULL, &req, sizeof(req));
  34
  35         // TODO: Data toggle?
  36         // TODO: Multi-packet transfers
  37         if( Type & 0x80 )
  38         {
  39                 void    *hdl2;
  40
  41                 hdl = Host->HostDef->SendIN(Host->Ptr, Addr, EndPt, 0, NULL, Data, Len);
  42
  43                 hdl2 = Host->HostDef->SendOUT(Host->Ptr, Addr, EndPt, 0, NULL, NULL, 0);
  44                 while( Host->HostDef->IsOpComplete(Host->Ptr, hdl2) == 0 )
  45                         Time_Delay(1);
  46         }
  47         else
  48         {
  49                 void    *hdl2;
  50
  51                 if( Len > 0 )
  52                         hdl = Host->HostDef->SendOUT(Host->Ptr, Addr, EndPt, 0, NULL, Data, Len);
  53                 else
  54                         hdl = NULL;
  55
  56                 // Status phase (DataToggle=1)
  57                 hdl2 = Host->HostDef->SendIN(Host->Ptr, Addr, EndPt, 1, NULL, NULL, 0);
  58                 while( Host->HostDef->IsOpComplete(Host->Ptr, hdl2) == 0 )
  59                         Time_Delay(1);
  60         }
  61         return hdl;
  62 }
  63
  64 int USB_int_SendSetupSetAddress(tUSBHost *Host, int Address)
  65 {
  66         USB_int_Request(Host, 0, 0, 0x00, 5, Address & 0x7F, 0, 0, NULL);
  67         return 0;
  68 }
  69
  70 int USB_int_ReadDescriptor(tUSBDevice *Dev, int Endpoint, int Type, int Index, int Length, void *Dest)
  71 {
  72         const int       ciMaxPacketSize = 0x400;
  73         struct sDeviceRequest   req;
  74          int    bToggle = 0;
  75         void    *final;
  76
  77         req.ReqType = 0x80;
  78         req.Request = 6;        // GET_DESCRIPTOR
  79         req.Value = LittleEndian16( ((Type & 0xFF) << 8) | (Index & 0xFF) );
  80         req.Index = LittleEndian16( 0 );        // TODO: Language ID
  81         req.Length = LittleEndian16( Length );
  82
  83         Dev->Host->HostDef->SendSETUP(
  84                 Dev->Host->Ptr, Dev->Address, Endpoint,
  85                 0, NULL,
  86                 &req, sizeof(req)
  87                 );
  88
  89         bToggle = 1;
  90         while( Length > ciMaxPacketSize )
  91         {
  92                 Dev->Host->HostDef->SendIN(
  93                         Dev->Host->Ptr, Dev->Address, Endpoint,
  94                         bToggle, NULL,
  95                         Dest, ciMaxPacketSize
  96                         );
  97                 bToggle = !bToggle;
  98                 Length -= ciMaxPacketSize;
  99         }
 100
 101         final = Dev->Host->HostDef->SendIN(
 102                 Dev->Host->Ptr, Dev->Address, Endpoint,
 103                 bToggle, INVLPTR,
 104                 Dest, Length
 105                 );
 106
 107         while( Dev->Host->HostDef->IsOpComplete(Dev->Host->Ptr, final) == 0 )
 108                 Time_Delay(1);
 109
 110         return 0;
 111 }
 112
 113 char *USB_int_GetDeviceString(tUSBDevice *Dev, int Endpoint, int Index)
 114 {
 115         struct sDescriptor_String       str;
 116          int    src_len, new_len;
 117         char    *ret;
 118
 119         USB_int_ReadDescriptor(Dev, Endpoint, 3, Index, sizeof(str), &str);
 120 //      if(str.Length > sizeof(str)) {
 121 //              // IMPOSSIBLE!
 122 //              Log_Error("USB", "String is %i bytes, which is over prealloc size (%i)",
 123 //                      str.Length, sizeof(str)
 124 //                      );
 125 //      }
 126         src_len = (str.Length - 2) / sizeof(str.Data[0]);
 127
 128         new_len = _UTF16to8(str.Data, src_len, NULL);
 129         ret = malloc( new_len + 1 );
 130         _UTF16to8(str.Data, src_len, ret);
 131         ret[new_len] = 0;
 132         return ret;
 133 }
 134
 135 int _UTF16to8(Uint16 *Input, int InputLen, char *Dest)
 136 {
 137          int    str_len, cp_len;
 138         Uint32  saved_bits = 0;
 139         str_len = 0;
 140         for( int i = 0; i < InputLen; i ++)
 141         {
 142                 Uint32  cp;
 143                 Uint16  val = Input[i];
 144                 if( val >= 0xD800 && val <= 0xDBFF )
 145                 {
 146                         // Multibyte - Leading
 147                         if(i + 1 > InputLen) {
 148                                 cp = '?';
 149                         }
 150                         else {
 151                                 saved_bits = (val - 0xD800) << 10;
 152                                 saved_bits += 0x10000;
 153                                 continue ;
 154                         }
 155                 }
 156                 else if( val >= 0xDC00 && val <= 0xDFFF )
 157                 {
 158                         if( !saved_bits ) {
 159                                 cp = '?';
 160                         }
 161                         else {
 162                                 saved_bits |= (val - 0xDC00);
 163                                 cp = saved_bits;
 164                         }
 165                 }
 166                 else
 167                         cp = val;
 168
 169                 cp_len = WriteUTF8((Uint8*)Dest, cp);
 170                 if(Dest)
 171                         Dest += cp_len;
 172                 str_len += cp_len;
 173
 174                 saved_bits = 0;
 175         }
 176
 177         return str_len;
 178 }
 179