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