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
  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, 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, NULL, Data, Len);
  42
  43                 hdl2 = Host->HostDef->SendOUT(Host->Ptr, Addr, EndPt, 0, NULL, 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, 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, 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         switch( Type & 0xF00 )
  79         {
  80         case 0x000:     req.ReqType |= (0 << 5);        break;  // Standard
  81         case 0x100:     req.ReqType |= (1 << 5);        break;  // Class
  82         case 0x200:     req.ReqType |= (2 << 5);        break;  // Vendor
  83         }
  84
  85         req.Request = 6;        // GET_DESCRIPTOR
  86         req.Value = LittleEndian16( ((Type & 0xFF) << 8) | (Index & 0xFF) );
  87         req.Index = LittleEndian16( 0 );        // TODO: Language ID
  88         req.Length = LittleEndian16( Length );
  89
  90         Dev->Host->HostDef->SendSETUP(
  91                 Dev->Host->Ptr, Dev->Address, Endpoint,
  92                 0, NULL, NULL,
  93                 &req, sizeof(req)
  94                 );
  95
  96         bToggle = 1;
  97         while( Length > ciMaxPacketSize )
  98         {
  99                 Dev->Host->HostDef->SendIN(
 100                         Dev->Host->Ptr, Dev->Address, Endpoint,
 101                         bToggle, NULL, NULL,
 102                         Dest, ciMaxPacketSize
 103                         );
 104                 bToggle = !bToggle;
 105                 Length -= ciMaxPacketSize;
 106         }
 107
 108         final = Dev->Host->HostDef->SendIN(
 109                 Dev->Host->Ptr, Dev->Address, Endpoint,
 110                 bToggle, INVLPTR, NULL,
 111                 Dest, Length
 112                 );
 113
 114         while( Dev->Host->HostDef->IsOpComplete(Dev->Host->Ptr, final) == 0 )
 115                 Time_Delay(1);
 116
 117         return 0;
 118 }
 119
 120 char *USB_int_GetDeviceString(tUSBDevice *Dev, int Endpoint, int Index)
 121 {
 122         struct sDescriptor_String       str;
 123          int    src_len, new_len;
 124         char    *ret;
 125
 126         if(Index == 0)  return strdup("");
 127
 128         USB_int_ReadDescriptor(Dev, Endpoint, 3, Index, sizeof(str), &str);
 129         if(str.Length < 2) {
 130                 Log_Error("USB", "String %p:%i:%i:%i descriptor is undersized (%i)",
 131                         Dev->Host, Dev->Address, Endpoint, Index, str.Length);
 132                 return NULL;
 133         }
 134 //      if(str.Length > sizeof(str)) {
 135 //              // IMPOSSIBLE!
 136 //              Log_Error("USB", "String is %i bytes, which is over prealloc size (%i)",
 137 //                      str.Length, sizeof(str)
 138 //                      );
 139 //      }
 140         src_len = (str.Length - 2) / sizeof(str.Data[0]);
 141
 142         LOG("&str = %p, src_len = %i", &str, src_len);
 143
 144         new_len = _UTF16to8(str.Data, src_len, NULL);
 145         ret = malloc( new_len + 1 );
 146         _UTF16to8(str.Data, src_len, ret);
 147         ret[new_len] = 0;
 148         return ret;
 149 }
 150
 151 int _UTF16to8(Uint16 *Input, int InputLen, char *Dest)
 152 {
 153          int    str_len, cp_len;
 154         Uint32  saved_bits = 0;
 155         str_len = 0;
 156         for( int i = 0; i < InputLen; i ++)
 157         {
 158                 Uint32  cp;
 159                 Uint16  val = Input[i];
 160                 if( val >= 0xD800 && val <= 0xDBFF )
 161                 {
 162                         // Multibyte - Leading
 163                         if(i + 1 > InputLen) {
 164                                 cp = '?';
 165                         }
 166                         else {
 167                                 saved_bits = (val - 0xD800) << 10;
 168                                 saved_bits += 0x10000;
 169                                 continue ;
 170                         }
 171                 }
 172                 else if( val >= 0xDC00 && val <= 0xDFFF )
 173                 {
 174                         if( !saved_bits ) {
 175                                 cp = '?';
 176                         }
 177                         else {
 178                                 saved_bits |= (val - 0xDC00);
 179                                 cp = saved_bits;
 180                         }
 181                 }
 182                 else
 183                         cp = val;
 184
 185                 cp_len = WriteUTF8((Uint8*)Dest, cp);
 186                 if(Dest)
 187                         Dest += cp_len;
 188                 str_len += cp_len;
 189
 190                 saved_bits = 0;
 191         }
 192
 193         return str_len;
 194 }
 195