KernelLand/Modules/Input/PS2KbMouse/ps2mouse.c

   1 /*\r
   2  * Acess2 Mouse Driver\r
   3  */\r
   4 #define DEBUG   0\r
   5 #include <acess.h>\r
   6 #include <modules.h>\r
   7 #include <vfs.h>\r
   8 #include <fs_devfs.h>\r
   9 #include <api_drv_common.h>\r
  10 #include <api_drv_joystick.h>\r
  11 #include "common.h"\r
  12 \r
  13 // == CONSTANTS ==\r
  14 #define NUM_AXIES       2       // X+Y\r
  15 #define NUM_BUTTONS     5       // Left, Right, Scroll Click, Scroll Up, Scroll Down\r
  16 \r
  17 // == PROTOTYPES ==\r
  18 // - Internal -\r
  19  int    PS2Mouse_Install(char **Arguments);\r
  20 void    PS2Mouse_HandleInterrupt(Uint8 InputByte);\r
  21 // - Filesystem -\r
  22 Uint64  PS2Mouse_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);\r
  23 int     PS2Mouse_IOCtl(tVFS_Node *Node, int ID, void *Data);\r
  24 \r
  25 // == GLOBALS ==\r
  26 void    (*gpMouse_EnableFcn)(void);\r
  27 // - Settings\r
  28  int    giMouse_Sensitivity = 1;\r
  29  int    giMouse_MaxX = 640, giMouse_MaxY = 480;\r
  30 // - File Data\r
  31 Uint8   gMouse_FileData[sizeof(tJoystick_FileHeader) + NUM_AXIES*sizeof(tJoystick_Axis) + NUM_BUTTONS];\r
  32 tJoystick_FileHeader    *gMouse_FileHeader = (void *)gMouse_FileData;\r
  33 tJoystick_Axis  *gMouse_Axies;\r
  34 Uint8   *gMouse_Buttons;\r
  35 tJoystick_Callback      gMouse_Callback;\r
  36  int    gMouse_CallbackArg;\r
  37  int    giMouse_AxisLimits[2];\r
  38 // - Internal State\r
  39  int    giMouse_Cycle = 0;      // IRQ Position\r
  40 Uint8   gaMouse_Bytes[4] = {0,0,0,0};\r
  41 // - Driver definition\r
  42 tVFS_NodeType   gMouse_NodeType = {\r
  43         .Read = PS2Mouse_Read,\r
  44         .IOCtl = PS2Mouse_IOCtl\r
  45 };\r
  46 tDevFS_Driver   gMouse_DriverStruct = {\r
  47         NULL, "PS2Mouse",\r
  48         {\r
  49         .NumACLs = 1, .ACLs = &gVFS_ACL_EveryoneRX,\r
  50         .Type = &gMouse_NodeType\r
  51         }\r
  52 };\r
  53 \r
  54 // == CODE ==\r
  55 int PS2Mouse_Install(char **Arguments)\r
  56 {\r
  57         \r
  58 \r
  59         // Set up variables\r
  60         gMouse_Axies = (void*)&gMouse_FileData[4];\r
  61         gMouse_Buttons = (void*)&gMouse_Axies[NUM_AXIES];\r
  62 \r
  63         gMouse_FileHeader->NAxies = 2;  gMouse_FileHeader->NButtons = 3;\r
  64         gMouse_Axies[0].MinValue = -10; gMouse_Axies[0].MaxValue = 10;\r
  65         gMouse_Axies[1].MinValue = -10; gMouse_Axies[1].MaxValue = 10;\r
  66         \r
  67         // Initialise Mouse Controller\r
  68         giMouse_Cycle = 0;      // Set Current Cycle position\r
  69         gpMouse_EnableFcn();\r
  70         \r
  71         DevFS_AddDevice(&gMouse_DriverStruct);\r
  72         \r
  73         return MODULE_ERR_OK;\r
  74 }\r
  75 \r
  76 /* Handle Mouse Interrupt\r
  77  */\r
  78 void PS2Mouse_HandleInterrupt(Uint8 InputByte)\r
  79 {\r
  80         Uint8   flags;\r
  81          int    d[2], d_accel[2];\r
  82          int    i;\r
  83         \r
  84         // Gather mouse data\r
  85         gaMouse_Bytes[giMouse_Cycle] = InputByte;\r
  86         LOG("gaMouse_Bytes[%i] = 0x%02x", gMouse_Axies[0].MaxValue);\r
  87         // - If bit 3 of the first byte is not set, it's not a valid packet?\r
  88         if(giMouse_Cycle == 0 && !(gaMouse_Bytes[0] & 0x08) )\r
  89                 return ;\r
  90         giMouse_Cycle++;\r
  91         if(giMouse_Cycle < 3)\r
  92                 return ;\r
  93 \r
  94         giMouse_Cycle = 0;\r
  95 \r
  96         // Actual Processing (once we have all bytes)   \r
  97         flags = gaMouse_Bytes[0];\r
  98 \r
  99         LOG("flags = 0x%x", flags);\r
 100         \r
 101         // Check for X/Y Overflow\r
 102         if(flags & 0xC0)        return;\r
 103                 \r
 104         // Calculate dX and dY\r
 105         d[0] = gaMouse_Bytes[1];        if(flags & 0x10) d[0] = -(256-d[0]);    // x\r
 106         d[1] = gaMouse_Bytes[2];        if(flags & 0x20) d[1] = -(256-d[1]);    // y\r
 107         d[1] = -d[1];   // Y is negated\r
 108         LOG("RAW dx=%i, dy=%i\n", d[0], d[1]);\r
 109         // Apply scaling\r
 110         // TODO: Apply a form of curve to the mouse movement (dx*log(dx), dx^k?)\r
 111         // TODO: Independent sensitivities?\r
 112         // TODO: Disable acceleration via a flag?\r
 113         d_accel[0] = d[0]*giMouse_Sensitivity;\r
 114         d_accel[1] = d[1]*giMouse_Sensitivity;\r
 115         \r
 116         // Set Buttons (Primary)\r
 117         for( i = 0; i < 3; i ++ )\r
 118         {\r
 119                 Uint8   newVal = (flags & (1 << i)) ? 0xFF : 0;\r
 120                 if(newVal != gMouse_Buttons[i]) {\r
 121                         if( gMouse_Callback )\r
 122                                 gMouse_Callback(gMouse_CallbackArg, 0, i, newVal - gMouse_Buttons[i]);\r
 123                         gMouse_Buttons[i] = newVal;\r
 124                 }\r
 125         }\r
 126         \r
 127         // Update X and Y Positions\r
 128         for( i = 0; i < 2; i ++ )\r
 129         {\r
 130                 Sint16  newCursor = 0;\r
 131                 if( giMouse_AxisLimits[i] )\r
 132                         newCursor = MIN( MAX(0, gMouse_Axies[i].CursorPos + d_accel[i]), giMouse_AxisLimits[i] );;\r
 133                 \r
 134                 if( gMouse_Callback )\r
 135                 {\r
 136                         if(giMouse_AxisLimits[i] && gMouse_Axies[i].CursorPos != newCursor)\r
 137                                 gMouse_Callback(gMouse_CallbackArg, 1, i, newCursor - gMouse_Axies[i].CursorPos);\r
 138                         if(!giMouse_AxisLimits[i] && gMouse_Axies[i].CurValue != d_accel[i])\r
 139                                 gMouse_Callback(gMouse_CallbackArg, 1, i, d_accel[i] - gMouse_Axies[i].CurValue);\r
 140                 }\r
 141                 \r
 142                 gMouse_Axies[i].CurValue = d_accel[i];\r
 143                 gMouse_Axies[i].CursorPos = newCursor;\r
 144         }\r
 145 \r
 146 //      Log("Mouse at %ix%i", gMouse_Axies[0].CursorPos, gMouse_Axies[1].CursorPos);\r
 147                 \r
 148         VFS_MarkAvaliable(&gMouse_DriverStruct.RootNode, 1);\r
 149 }\r
 150 \r
 151 /* Read mouse state (coordinates)\r
 152  */\r
 153 Uint64 PS2Mouse_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)\r
 154 {\r
 155         if(Offset > sizeof(gMouse_FileData))    return 0;\r
 156         if(Length > sizeof(gMouse_FileData))    Length = sizeof(gMouse_FileData);\r
 157         if(Offset + Length > sizeof(gMouse_FileData))   Length = sizeof(gMouse_FileData) - Offset;\r
 158 \r
 159         memcpy(Buffer, &gMouse_FileData[Offset], Length);\r
 160         \r
 161         VFS_MarkAvaliable(Node, 0);\r
 162         return Length;\r
 163 }\r
 164 \r
 165 static const char *csaIOCtls[] = {DRV_IOCTLNAMES, DRV_JOY_IOCTLNAMES, NULL};\r
 166 /* Handle messages to the device\r
 167  */\r
 168 int PS2Mouse_IOCtl(tVFS_Node *Node, int ID, void *Data)\r
 169 {\r
 170         tJoystick_NumValue      *info = Data;\r
 171 \r
 172         switch(ID)\r
 173         {\r
 174         BASE_IOCTLS(DRV_TYPE_JOYSTICK, "PS2Mouse", 0x100, csaIOCtls);\r
 175 \r
 176         case JOY_IOCTL_SETCALLBACK:     // TODO: Implement\r
 177                 return -1;\r
 178         \r
 179         case JOY_IOCTL_SETCALLBACKARG:  // TODO: Implement\r
 180                 return -1;\r
 181         \r
 182         case JOY_IOCTL_GETSETAXISLIMIT:\r
 183                 if(!info)       return 0;\r
 184                 if(info->Num < 0 || info->Num >= 2)     return 0;\r
 185                 if(info->Value != -1)\r
 186                         giMouse_AxisLimits[info->Num] = info->Value;\r
 187                 return giMouse_AxisLimits[info->Num];\r
 188         \r
 189         case JOY_IOCTL_GETSETAXISPOSITION:\r
 190                 if(!info)       return 0;\r
 191                 if(info->Num < 0 || info->Num >= 2)     return 0;\r
 192                 if(info->Value != -1)\r
 193                         gMouse_Axies[info->Num].CursorPos = info->Value;\r
 194                 return gMouse_Axies[info->Num].CursorPos;\r
 195 \r
 196         case JOY_IOCTL_GETSETAXISFLAGS:\r
 197                 return -1;\r
 198         \r
 199         case JOY_IOCTL_GETSETBUTTONFLAGS:\r
 200                 return -1;\r
 201 \r
 202         default:\r
 203                 return 0;\r
 204         }\r
 205 }\r
 206 \r