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 tMutex  glUSB_Hosts;
  25 tUSBHost        *gUSB_Hosts = NULL;
  26 tMutex  glUSB_InterfaceDrivers;
  27 tUSBDriver      *gpUSB_InterfaceDrivers = &gUSBHub_Driver;
  28
  29 // === CODE ===
  30 tUSBHub *USB_RegisterHost(tUSBHostDef *HostDef, void *ControllerPtr, int nPorts)
  31 {
  32         tUSBHost        *host;
  33
  34         host = malloc(sizeof(tUSBHost) + nPorts*sizeof(void*));
  35         if(!host) {
  36                 // Oh, bugger.
  37                 return NULL;
  38         }
  39         host->HostDef = HostDef;
  40         host->Ptr = ControllerPtr;
  41         memset(host->AddressBitmap, 0, sizeof(host->AddressBitmap));
  42
  43         host->RootHubDev.ParentHub = NULL;
  44         host->RootHubDev.Host = host;
  45         host->RootHubDev.Address = 0;
  46
  47 //      host->RootHubIf.Next = NULL;
  48         host->RootHubIf.Dev = &host->RootHubDev;
  49         host->RootHubIf.Driver = NULL;
  50         host->RootHubIf.Data = NULL;
  51         host->RootHubIf.nEndpoints = 0;
  52
  53         host->RootHub.Interface = &host->RootHubIf;
  54         host->RootHub.nPorts = nPorts;
  55         memset(host->RootHub.Devices, 0, sizeof(void*)*nPorts);
  56
  57         // Append to list
  58         Mutex_Acquire( &glUSB_Hosts );
  59         host->Next = gUSB_Hosts;
  60         gUSB_Hosts = host;
  61         Mutex_Release( &glUSB_Hosts );
  62
  63         return &host->RootHub;
  64 }
  65
  66 // --- Drivers ---
  67 void USB_RegisterDriver(tUSBDriver *Driver)
  68 {
  69         Mutex_Acquire( &glUSB_InterfaceDrivers );
  70         Driver->Next = gpUSB_InterfaceDrivers;
  71         gpUSB_InterfaceDrivers = Driver;
  72         Mutex_Release( &glUSB_InterfaceDrivers );
  73
  74         // TODO: Recheck devices that didn't have a driver
  75 }
  76
  77 tUSBDriver *USB_int_FindDriverByClass(Uint32 ClassCode)
  78 {
  79         ENTER("xClassCode", ClassCode);
  80         for( tUSBDriver *ret = gpUSB_InterfaceDrivers; ret; ret = ret->Next )
  81         {
  82                 LOG(" 0x%x & 0x%x == 0x%x?", ClassCode, ret->Match.Class.ClassMask, ret->Match.Class.ClassCode);
  83                 if( (ClassCode & ret->Match.Class.ClassMask) == ret->Match.Class.ClassCode )
  84                 {
  85                         LOG("Found '%s'", ret->Name);
  86                         LEAVE('p', ret);
  87                         return ret;
  88                 }
  89         }
  90         LEAVE('n');
  91         return NULL;
  92 }
  93
  94 // --- Hub Registration ---
  95 // NOTE: Doesn't do much nowdays
  96 tUSBHub *USB_RegisterHub(tUSBInterface *Device, int PortCount)
  97 {
  98         tUSBHub *ret;
  99
 100         ret = malloc(sizeof(tUSBHub) + sizeof(ret->Devices[0])*PortCount);
 101         ret->Interface = Device;
 102         ret->nPorts = PortCount;
 103         memset(ret->Devices, 0, sizeof(ret->Devices[0])*PortCount);
 104         return ret;
 105 }
 106
 107 void USB_RemoveHub(tUSBHub *Hub)
 108 {
 109         for( int i = 0; i < Hub->nPorts; i ++ )
 110         {
 111                 if( Hub->Devices[i] )
 112                 {
 113                         USB_DeviceDisconnected( Hub, i );
 114                 }
 115         }
 116         free(Hub);
 117 }
 118