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 tUSBHub *USB_RegisterHost(tUSBHostDef *HostDef, void *ControllerPtr, int nPorts)
  28 {
  29         tUSBHost        *host;
  30
  31         host = malloc(sizeof(tUSBHost) + nPorts*sizeof(void*));
  32         if(!host) {
  33                 // Oh, bugger.
  34                 return NULL;
  35         }
  36         host->HostDef = HostDef;
  37         host->Ptr = ControllerPtr;
  38         memset(host->AddressBitmap, 0, sizeof(host->AddressBitmap));
  39
  40         host->RootHubDev.ParentHub = NULL;
  41         host->RootHubDev.Host = host;
  42         host->RootHubDev.Address = 0;
  43
  44 //      host->RootHubIf.Next = NULL;
  45         host->RootHubIf.Dev = &host->RootHubDev;
  46         host->RootHubIf.Driver = NULL;
  47         host->RootHubIf.Data = NULL;
  48         host->RootHubIf.nEndpoints = 0;
  49
  50         host->RootHub.Interface = &host->RootHubIf;
  51         host->RootHub.nPorts = nPorts;
  52         memset(host->RootHub.Devices, 0, sizeof(void*)*nPorts);
  53
  54         // TODO: Lock
  55         host->Next = gUSB_Hosts;
  56         gUSB_Hosts = host;
  57
  58         return &host->RootHub;
  59 }
  60
  61 // --- Drivers ---
  62 void USB_RegisterDriver(tUSBDriver *Driver)
  63 {
  64         Driver->Next = gpUSB_InterfaceDrivers;
  65         gpUSB_InterfaceDrivers = Driver;
  66 }
  67
  68 tUSBDriver *USB_int_FindDriverByClass(Uint32 ClassCode)
  69 {
  70         ENTER("xClassCode", ClassCode);
  71         for( tUSBDriver *ret = gpUSB_InterfaceDrivers; ret; ret = ret->Next )
  72         {
  73                 LOG(" 0x%x & 0x%x == 0x%x?", ClassCode, ret->Match.Class.ClassMask, ret->Match.Class.ClassCode);
  74                 if( (ClassCode & ret->Match.Class.ClassMask) == ret->Match.Class.ClassCode )
  75                 {
  76                         LOG("Found '%s'", ret->Name);
  77                         LEAVE('p', ret);
  78                         return ret;
  79                 }
  80         }
  81         LEAVE('n');
  82         return NULL;
  83 }
  84
  85 // --- Hub Registration ---
  86 // NOTE: Doesn't do much nowdays
  87 tUSBHub *USB_RegisterHub(tUSBInterface *Device, int PortCount)
  88 {
  89         tUSBHub *ret;
  90
  91         ret = malloc(sizeof(tUSBHub) + sizeof(ret->Devices[0])*PortCount);
  92         ret->Interface = Device;
  93         ret->nPorts = PortCount;
  94         memset(ret->Devices, 0, sizeof(ret->Devices[0])*PortCount);
  95         return ret;
  96 }
  97
  98 void USB_RemoveHub(tUSBHub *Hub)
  99 {
 100         for( int i = 0; i < Hub->nPorts; i ++ )
 101         {
 102                 if( Hub->Devices[i] )
 103                 {
 104                         USB_DeviceDisconnected( Hub, i );
 105                 }
 106         }
 107         free(Hub);
 108 }
 109