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          int    dest = Addr * 16 + EndPt;       // TODO: Validate
  29         req.ReqType = Type;
  30         req.Request = Req;
  31         req.Value = LittleEndian16( Val );
  32         req.Index = LittleEndian16( Indx );
  33         req.Length = LittleEndian16( Len );
  34
  35         hdl = Host->HostDef->SendSETUP(Host->Ptr, dest, 0, NULL, NULL, &req, sizeof(req));
  36
  37         // TODO: Data toggle?
  38         // TODO: Multi-packet transfers
  39         if( Type & 0x80 )
  40         {
  41                 void    *hdl2;
  42
  43                 hdl = Host->HostDef->SendIN(Host->Ptr, dest, 0, NULL, NULL, Data, Len);
  44
  45                 hdl2 = Host->HostDef->SendOUT(Host->Ptr, dest, 0, NULL, NULL, NULL, 0);
  46                 while( Host->HostDef->IsOpComplete(Host->Ptr, hdl2) == 0 )
  47                         Time_Delay(1);
  48         }
  49         else
  50         {
  51                 void    *hdl2;
  52
  53                 if( Len > 0 )
  54                         hdl = Host->HostDef->SendOUT(Host->Ptr, dest, 0, NULL, NULL, Data, Len);
  55                 else
  56                         hdl = NULL;
  57
  58                 // Status phase (DataToggle=1)
  59                 hdl2 = Host->HostDef->SendIN(Host->Ptr, dest, 1, NULL, NULL, NULL, 0);
  60                 while( Host->HostDef->IsOpComplete(Host->Ptr, hdl2) == 0 )
  61                         Time_Delay(1);
  62         }
  63         return hdl;
  64 }
  65
  66 int USB_int_SendSetupSetAddress(tUSBHost *Host, int Address)
  67 {
  68         USB_int_Request(Host, 0, 0, 0x00, 5, Address & 0x7F, 0, 0, NULL);
  69         return 0;
  70 }
  71
  72 int USB_int_ReadDescriptor(tUSBDevice *Dev, int Endpoint, int Type, int Index, int Length, void *Dest)
  73 {
  74         const int       ciMaxPacketSize = 0x400;
  75         struct sDeviceRequest   req;
  76          int    bToggle = 0;
  77         void    *final;
  78          int    dest = Dev->Address*16 + Endpoint;
  79
  80         req.ReqType = 0x80;
  81         req.ReqType |= ((Type >> 8) & 0x3) << 5;        // Bits 5/6
  82         req.ReqType |= (Type >> 12) & 3;        // Destination (Device, Interface, Endpoint, Other);
  83
  84         req.Request = 6;        // GET_DESCRIPTOR
  85         req.Value = LittleEndian16( ((Type & 0xFF) << 8) | (Index & 0xFF) );
  86         req.Index = LittleEndian16( 0 );        // TODO: Language ID / Interface
  87         req.Length = LittleEndian16( Length );
  88
  89         Dev->Host->HostDef->SendSETUP(
  90                 Dev->Host->Ptr, dest,
  91                 0, NULL, NULL,
  92                 &req, sizeof(req)
  93                 );
  94
  95         bToggle = 1;
  96         while( Length > ciMaxPacketSize )
  97         {
  98                 Dev->Host->HostDef->SendIN(
  99                         Dev->Host->Ptr, dest,
 100                         bToggle, NULL, NULL,
 101                         Dest, ciMaxPacketSize
 102                         );
 103                 bToggle = !bToggle;
 104                 Length -= ciMaxPacketSize;
 105         }
 106
 107         final = Dev->Host->HostDef->SendIN(
 108                 Dev->Host->Ptr, dest,
 109                 bToggle, INVLPTR, NULL,
 110                 Dest, Length
 111                 );
 112
 113         while( Dev->Host->HostDef->IsOpComplete(Dev->Host->Ptr, final) == 0 )
 114                 Threads_Yield();
 115
 116         return 0;
 117 }
 118
 119 char *USB_int_GetDeviceString(tUSBDevice *Dev, int Endpoint, int Index)
 120 {
 121         struct sDescriptor_String       str;
 122          int    src_len, new_len;
 123         char    *ret;
 124
 125         if(Index == 0)  return strdup("");
 126
 127         USB_int_ReadDescriptor(Dev, Endpoint, 3, Index, sizeof(str), &str);
 128         if(str.Length < 2) {
 129                 Log_Error("USB", "String %p:%i:%i:%i descriptor is undersized (%i)",
 130                         Dev->Host, Dev->Address, Endpoint, Index, str.Length);
 131                 return NULL;
 132         }
 133 //      if(str.Length > sizeof(str)) {
 134 //              // IMPOSSIBLE!
 135 //              Log_Error("USB", "String is %i bytes, which is over prealloc size (%i)",
 136 //                      str.Length, sizeof(str)
 137 //                      );
 138 //      }
 139         src_len = (str.Length - 2) / sizeof(str.Data[0]);
 140
 141         LOG("&str = %p, src_len = %i", &str, src_len);
 142
 143         new_len = _UTF16to8(str.Data, src_len, NULL);
 144         ret = malloc( new_len + 1 );
 145         _UTF16to8(str.Data, src_len, ret);
 146         ret[new_len] = 0;
 147         return ret;
 148 }
 149
 150 int _UTF16to8(Uint16 *Input, int InputLen, char *Dest)
 151 {
 152          int    str_len, cp_len;
 153         Uint32  saved_bits = 0;
 154         str_len = 0;
 155         for( int i = 0; i < InputLen; i ++)
 156         {
 157                 Uint32  cp;
 158                 Uint16  val = Input[i];
 159                 if( val >= 0xD800 && val <= 0xDBFF )
 160                 {
 161                         // Multibyte - Leading
 162                         if(i + 1 > InputLen) {
 163                                 cp = '?';
 164                         }
 165                         else {
 166                                 saved_bits = (val - 0xD800) << 10;
 167                                 saved_bits += 0x10000;
 168                                 continue ;
 169                         }
 170                 }
 171                 else if( val >= 0xDC00 && val <= 0xDFFF )
 172                 {
 173                         if( !saved_bits ) {
 174                                 cp = '?';
 175                         }
 176                         else {
 177                                 saved_bits |= (val - 0xDC00);
 178                                 cp = saved_bits;
 179                         }
 180                 }
 181                 else
 182                         cp = val;
 183
 184                 cp_len = WriteUTF8((Uint8*)Dest, cp);
 185                 if(Dest)
 186                         Dest += cp_len;
 187                 str_len += cp_len;
 188
 189                 saved_bits = 0;
 190         }
 191
 192         return str_len;
 193 }
 194