KernelLand/Modules/USB/Core/hub.c

   1 /*
   2  * Acess2 USB Stack
   3  * - By John Hodge (thePowersGang)
   4  *
   5  * hub.c
   6  * - Basic hub driver
   7  */
   8 #define DEBUG   1
   9 #include <usb_hub.h>
  10 #include <timers.h>
  11
  12 #define MAX_PORTS       32      // Not actually a max, but used for DeviceRemovable
  13
  14
  15 #define GET_STATUS      0
  16 #define CLEAR_FEATURE   1
  17 // resvd
  18 #define SET_FEATURE     3
  19
  20 #define PORT_CONNECTION 0
  21 #define PORT_ENABLE     1
  22 #define PORT_SUSPEND    2
  23 #define PORT_OVER_CURRENT       3
  24 #define PORT_RESET      4
  25 #define PORT_POWER      8
  26 #define PORT_LOW_SPEED  9
  27 #define C_PORT_CONNECTION       16
  28 #define C_PORT_ENABLE   17
  29 #define C_PORT_SUSPEND  18
  30 #define C_PORT_OVER_CURRENT     19
  31 #define C_PORT_RESET    20
  32 #define PORT_TEST       21
  33 #define PORT_INDICATOR  21
  34
  35 struct sHubDescriptor
  36 {
  37         Uint8   DescLength;
  38         Uint8   DescType;       // = 0x29
  39         Uint8   NbrPorts;
  40         Uint16  HubCharacteristics;
  41         Uint8   PwrOn2PwrGood;  // 2 ms intervals
  42         Uint8   HubContrCurrent;        // Max internal current (mA)
  43         Uint8   DeviceRemovable[MAX_PORTS];
  44 };
  45
  46 struct sHubInfo
  47 {
  48         tUSBHub *HubPtr;
  49          int    PowerOnDelay;   // in ms
  50          int    nPorts;
  51         Uint8   DeviceRemovable[];
  52 };
  53
  54 // === PROTOTYPES ===
  55 void    Hub_Connected(tUSBInterface *Dev);
  56 void    Hub_Disconnected(tUSBInterface *Dev);
  57 void    Hub_PortStatusChange(tUSBInterface *Dev, int Endpoint, int Length, void *Data);
  58 void    Hub_int_HandleChange(tUSBInterface *Dev, int Port);
  59
  60 // === GLOBALS ===
  61 tUSBDriver      gUSBHub_Driver = {
  62         .Name = "Hub",
  63         .Match = {.Class = {0x090000, 0xFF0000}},
  64         .Connected = Hub_Connected,
  65         .Disconnected = Hub_Disconnected,
  66         .MaxEndpoints = 1,
  67         .Endpoints = {
  68                 {0x83, Hub_PortStatusChange}
  69         }
  70 };
  71
  72 // === CODE ===
  73 #if 0
  74 int Hub_DriverInitialise(char **Arguments)
  75 {
  76         USB_RegisterDriver( &gUSBHub_Driver );
  77         return 0;
  78 }
  79 #endif
  80
  81 void Hub_Connected(tUSBInterface *Dev)
  82 {
  83         struct sHubDescriptor   hub_desc;
  84         struct sHubInfo *info;
  85
  86         // Read hub descriptor (Class descriptor 0x29)
  87         USB_ReadDescriptor(Dev, 0x129, 0, sizeof(hub_desc), &hub_desc);
  88
  89         LOG("%i Ports", hub_desc.NbrPorts);
  90         LOG("Takes %i ms for power to stabilise", hub_desc.PwrOn2PwrGood*2);
  91
  92         // Allocate infomation structure
  93         info = malloc(sizeof(*info) + (hub_desc.NbrPorts+7)/8);
  94         if(!info) {
  95                 Log_Error("USBHub", "malloc() failed");
  96                 return ;
  97         }
  98         USB_SetDeviceDataPtr(Dev, info);
  99
 100         // Fill data
 101         info->nPorts = hub_desc.NbrPorts;
 102         info->PowerOnDelay = hub_desc.PwrOn2PwrGood * 2;
 103         memcpy(info->DeviceRemovable, hub_desc.DeviceRemovable, (hub_desc.NbrPorts+7)/8);
 104         // Register
 105         info->HubPtr = USB_RegisterHub(Dev, info->nPorts);
 106
 107         // Register poll on endpoint
 108         USB_StartPollingEndpoint(Dev, 1);
 109 }
 110
 111 void Hub_Disconnected(tUSBInterface *Dev)
 112 {
 113         struct sHubInfo *info = USB_GetDeviceDataPtr(Dev);
 114         USB_RemoveHub(info->HubPtr);
 115         free(info);
 116 }
 117
 118 void Hub_PortStatusChange(tUSBInterface *Dev, int Endpoint, int Length, void *Data)
 119 {
 120         Uint8   *status = Data;
 121         struct sHubInfo *info = USB_GetDeviceDataPtr(Dev);
 122          int    i;
 123         for( i = 0; i < info->nPorts; i += 8, status ++ )
 124         {
 125                 if( i/8 >= Length )     break;
 126                 if( *status == 0 )      continue;
 127
 128                 for( int j = 0; j < 8; j ++ )
 129                         if( *status & (1 << j) )
 130                                 Hub_int_HandleChange(Dev, i+j);
 131         }
 132 }
 133
 134 void Hub_int_HandleChange(tUSBInterface *Dev, int Port)
 135 {
 136         struct sHubInfo *info = USB_GetDeviceDataPtr(Dev);
 137         Uint16  status[2];      // Status, Change
 138
 139         // Get port status
 140         USB_Request(Dev, 0, 0xA3, GET_STATUS, 0, Port, 4, status);
 141
 142         LOG("Port %i: status = {0b%b, 0b%b}", Port, status[0], status[1]);
 143
 144         // Handle connections / disconnections
 145         if( status[1] & 0x0001 )
 146         {
 147                 if( status[0] & 0x0001 ) {
 148                         // Connected
 149                         // - Power on port
 150                         USB_Request(Dev, 0, 0x23, SET_FEATURE, PORT_POWER, Port, 0, NULL);
 151                         Time_Delay(info->PowerOnDelay);
 152                         // - Reset
 153                         USB_Request(Dev, 0, 0x23, SET_FEATURE, PORT_RESET, Port, 0, NULL);
 154                         Time_Delay(20); // Spec says 10ms after reset, but how long is reset?
 155                         // - Enable
 156                         USB_Request(Dev, 0, 0x23, SET_FEATURE, PORT_ENABLE, Port, 0, NULL);
 157                         // - Poke USB Stack
 158                         USB_DeviceConnected(info->HubPtr, Port);
 159                 }
 160                 else {
 161                         // Disconnected
 162                         USB_DeviceDisconnected(info->HubPtr, Port);
 163                 }
 164
 165                 USB_Request(Dev, 0, 0x23, CLEAR_FEATURE, C_PORT_CONNECTION, Port, 0, NULL);
 166         }
 167
 168         // Reset change
 169         if( status[1] & 0x0010 )
 170         {
 171                 if( status[0] & 0x0010 ) {
 172                         // Reset complete
 173                 }
 174                 else {
 175                         // Useful?
 176                 }
 177                 // ACK
 178                 USB_Request(Dev, 0, 0x23, CLEAR_FEATURE, C_PORT_RESET, Port, 0, NULL);
 179         }
 180 }