KernelLand/Modules/USB/Core/usb.c

   1 /*
   2  * Acess2 USB Stack
   3  * - By John Hodge (thePowersGang)
   4  *
   5  * usb.c
   6  * - USB Structure
   7  */
   8 #define DEBUG   1
   9 #include <acess.h>
  10 #include <vfs.h>
  11 #include <drv_pci.h>
  12 #include "usb.h"
  13
  14 // === IMPORTS ===
  15 extern tUSBHost *gUSB_Hosts;
  16 extern tUSBDriver gUSBHub_Driver;
  17
  18 // === STRUCTURES ===
  19
  20 // === PROTOTYPES ===
  21 tUSBHub *USB_RegisterHost(tUSBHostDef *HostDef, void *ControllerPtr, int nPorts);
  22
  23 // === GLOBALS ===
  24 tUSBDriver      *gpUSB_InterfaceDrivers = &gUSBHub_Driver;
  25
  26 // === CODE ===
  27 void USB_RegisterDriver(tUSBDriver *Driver)
  28 {
  29         Driver->Next = gpUSB_InterfaceDrivers;
  30         gpUSB_InterfaceDrivers = Driver;
  31 }
  32
  33 tUSBHub *USB_RegisterHost(tUSBHostDef *HostDef, void *ControllerPtr, int nPorts)
  34 {
  35         tUSBHost        *host;
  36
  37         host = malloc(sizeof(tUSBHost) + nPorts*sizeof(void*));
  38         if(!host) {
  39                 // Oh, bugger.
  40                 return NULL;
  41         }
  42         host->HostDef = HostDef;
  43         host->Ptr = ControllerPtr;
  44         memset(host->AddressBitmap, 0, sizeof(host->AddressBitmap));
  45
  46         host->RootHubDev.ParentHub = NULL;
  47         host->RootHubDev.Host = host;
  48         host->RootHubDev.Address = 0;
  49
  50 //      host->RootHubIf.Next = NULL;
  51         host->RootHubIf.Dev = &host->RootHubDev;
  52         host->RootHubIf.Driver = NULL;
  53         host->RootHubIf.Data = NULL;
  54         host->RootHubIf.nEndpoints = 0;
  55
  56         host->RootHub.Interface = &host->RootHubIf;
  57         host->RootHub.nPorts = nPorts;
  58         memset(host->RootHub.Devices, 0, sizeof(void*)*nPorts);
  59
  60         // TODO: Lock
  61         host->Next = gUSB_Hosts;
  62         gUSB_Hosts = host;
  63
  64         return &host->RootHub;
  65 }
  66
  67 // --- Drivers ---
  68 void USB_RegisterDriver(tUSBDriver *Driver)
  69 {
  70         Log_Warning("USB", "TODO: Implement USB_RegisterDriver");
  71 }
  72
  73 tUSBDriver *USB_int_FindDriverByClass(Uint32 ClassCode)
  74 {
  75         ENTER("xClassCode", ClassCode);
  76         for( tUSBDriver *ret = gpUSB_InterfaceDrivers; ret; ret = ret->Next )
  77         {
  78                 LOG(" 0x%x & 0x%x == 0x%x?", ClassCode, ret->Match.Class.ClassMask, ret->Match.Class.ClassCode);
  79                 if( (ClassCode & ret->Match.Class.ClassMask) == ret->Match.Class.ClassCode )
  80                 {
  81                         LOG("Found '%s'", ret->Name);
  82                         LEAVE('p', ret);
  83                         return ret;
  84                 }
  85         }
  86         LEAVE('n');
  87         return NULL;
  88 }
  89
  90 // --- Hub Registration ---
  91 // NOTE: Doesn't do much nowdays
  92 tUSBHub *USB_RegisterHub(tUSBInterface *Device, int PortCount)
  93 {
  94         tUSBHub *ret;
  95
  96         ret = malloc(sizeof(tUSBHub) + sizeof(ret->Devices[0])*PortCount);
  97         ret->Interface = Device;
  98         ret->nPorts = PortCount;
  99         memset(ret->Devices, 0, sizeof(ret->Devices[0])*PortCount);
 100         return ret;
 101 }
 102
 103 void USB_RemoveHub(tUSBHub *Hub)
 104 {
 105         for( int i = 0; i < Hub->nPorts; i ++ )
 106         {
 107                 if( Hub->Devices[i] )
 108                 {
 109                         USB_DeviceDisconnected( Hub, i );
 110                 }
 111         }
 112         free(Hub);
 113 }
 114