3 * - By John Hodge (thePowersGang)
5 * Universal Host Controller Interface
8 #define VERSION VER2(0,5)
17 #define MAX_CONTROLLERS 4
21 int UHCI_Initialise();
23 tUHCI_TD *UHCI_int_AllocateTD(tUHCI_Controller *Cont);
24 void UHCI_int_AppendTD(tUHCI_Controller *Cont, tUHCI_TD *TD);
25 void *UHCI_int_SendTransaction(tUHCI_Controller *Cont, int Addr, Uint8 Type, int bTgl, tUSBHostCb Cb, void *Data, size_t Length);
26 void *UHCI_DataIN(void *Ptr, int Fcn, int Endpt, int DataTgl, tUSBHostCb Cb, void *Data, size_t Length);
27 void *UHCI_DataOUT(void *Ptr, int Fcn, int Endpt, int DataTgl, tUSBHostCb Cb, void *Data, size_t Length);
28 void *UHCI_SendSetup(void *Ptr, int Fcn, int Endpt, int DataTgl, tUSBHostCb Cb, void *Data, size_t Length);
29 int UHCI_IsTransferComplete(void *Ptr, void *Handle);
30 void UHCI_Hub_Poll(tUSBHub *Hub, tUSBDevice *Dev);
31 int UHCI_Int_InitHost(tUHCI_Controller *Host);
32 void UHCI_CheckPortUpdate(tUHCI_Controller *Host);
33 void UHCI_InterruptHandler(int IRQ, void *Ptr);
36 MODULE_DEFINE(0, VERSION, USB_UHCI, UHCI_Initialise, NULL, "USB_Core", NULL);
37 tUHCI_TD gaUHCI_TDPool[NUM_TDs];
38 tUHCI_Controller gUHCI_Controllers[MAX_CONTROLLERS];
39 tUSBHostDef gUHCI_HostDef = {
40 .SendIN = UHCI_DataIN,
41 .SendOUT = UHCI_DataOUT,
42 .SendSETUP = UHCI_SendSetup,
43 .CheckPorts = (void*)UHCI_CheckPortUpdate,
44 .IsOpComplete = UHCI_IsTransferComplete
49 * \fn int UHCI_Initialise()
50 * \brief Called to initialise the UHCI Driver
52 int UHCI_Initialise(const char **Arguments)
59 // Enumerate PCI Bus, getting a maximum of `MAX_CONTROLLERS` devices
60 while( (id = PCI_GetDeviceByClass(0x0C03, 0xFFFF, id)) >= 0 && i < MAX_CONTROLLERS )
62 tUHCI_Controller *cinfo = &gUHCI_Controllers[i];
63 // NOTE: Check "protocol" from PCI?
66 cinfo->IOBase = PCI_GetBAR(id, 4);
67 if( !(cinfo->IOBase & 1) ) {
68 Log_Warning("UHCI", "MMIO is not supported");
72 cinfo->IRQNum = PCI_GetIRQ(id);
74 Log_Debug("UHCI", "Controller PCI #%i: IO Base = 0x%x, IRQ %i",
75 id, cinfo->IOBase, cinfo->IRQNum);
77 IRQ_AddHandler(cinfo->IRQNum, UHCI_InterruptHandler, cinfo);
80 ret = UHCI_Int_InitHost(&gUHCI_Controllers[i]);
87 cinfo->RootHub = USB_RegisterHost(&gUHCI_HostDef, cinfo, 2);
88 LOG("cinfo->RootHub = %p", cinfo->RootHub);
90 UHCI_CheckPortUpdate(cinfo);
94 if(i == MAX_CONTROLLERS) {
95 Log_Warning("UHCI", "Over "EXPAND_STR(MAX_CONTROLLERS)" UHCI controllers detected, ignoring rest");
97 LEAVE('i', MODULE_ERR_OK);
102 * \fn void UHCI_Cleanup()
103 * \brief Called just before module is unloaded
109 tUHCI_TD *UHCI_int_AllocateTD(tUHCI_Controller *Cont)
112 for(i = 0; i < NUM_TDs; i ++)
114 if(gaUHCI_TDPool[i].Link == 0) {
115 gaUHCI_TDPool[i].Link = 1;
116 gaUHCI_TDPool[i].Control = 1 << 23;
117 return &gaUHCI_TDPool[i];
119 // Still in use? Skip
120 if( gaUHCI_TDPool[i].Control & (1 << 23) )
122 // Is there a callback on it? Skip
123 if( gaUHCI_TDPool[i]._info.Callback )
125 // TODO: Garbage collect, but that means removing from the list too
127 // Ok, this is actually unused
128 gaUHCI_TDPool[i].Link = 1;
129 gaUHCI_TDPool[i].Control = 1 << 23;
130 return &gaUHCI_TDPool[i];
136 void UHCI_int_AppendTD(tUHCI_Controller *Cont, tUHCI_TD *TD)
138 int next_frame = (inw(Cont->IOBase + FRNUM) + 2) & (1024-1);
139 tPAddr td_pool_base = MM_GetPhysAddr( (tVAddr)gaUHCI_TDPool );
143 // TODO: How to handle FRNUM incrementing while we are in this function?
146 if( Cont->FrameList[next_frame] & 1 )
148 // TODO: Ensure 32-bit paddr
149 Cont->FrameList[next_frame] = MM_GetPhysAddr( (tVAddr)TD );
150 LOG("next_frame = %i", next_frame);
154 // Find the end of the list
155 link = Cont->FrameList[next_frame];
157 // TODO: Fix this to work with a non-contiguous pool
158 prev_td = gaUHCI_TDPool + (link - td_pool_base) / sizeof(gaUHCI_TDPool[0]);
159 link = prev_td->Link;
160 } while( !(link & 1) );
163 prev_td->Link = MM_GetPhysAddr( (tVAddr)TD );
165 LOG("next_frame = %i, prev_td = %p", next_frame, prev_td);
169 * \brief Send a transaction to the USB bus
170 * \param Cont Controller pointer
171 * \param Addr Function Address * 16 + Endpoint
172 * \param bTgl Data toggle value
174 void *UHCI_int_SendTransaction(tUHCI_Controller *Cont, int Addr, Uint8 Type, int bTgl, tUSBHostCb Cb, void *Data, size_t Length)
178 if( Length > 0x400 ) return NULL; // Controller allows up to 0x500, but USB doesn't
180 td = UHCI_int_AllocateTD(Cont);
184 Log_Error("UHCI", "No avaliable TDs, transaction dropped");
189 td->Control = (Length - 1) & 0x7FF;
190 td->Control |= (1 << 23);
191 td->Token = ((Length - 1) & 0x7FF) << 21;
192 td->Token |= (bTgl & 1) << 19;
193 td->Token |= (Addr & 0xF) << 15;
194 td->Token |= ((Addr/16) & 0xFF) << 8;
197 // TODO: Ensure 32-bit paddr
198 if( ((tVAddr)Data & (PAGE_SIZE-1)) + Length > PAGE_SIZE ) {
199 Log_Warning("UHCI", "TODO: Support non single page transfers (%x + %x > %x)",
200 (tVAddr)Data & (PAGE_SIZE-1), Length, PAGE_SIZE
202 // TODO: Need to enable IOC to copy the data back
203 // td->BufferPointer =
207 td->BufferPointer = MM_GetPhysAddr( (tVAddr)Data );
210 // Interrupt on completion
212 td->Control |= (1 << 24);
213 td->_info.Callback = Cb; // NOTE: if ERRPTR then the TD is kept allocated until checked
216 Log_Warning("UHCI", "TODO: Support IOC... somehow");
220 td->_info.DestPtr = Data;
222 UHCI_int_AppendTD(Cont, td);
227 void *UHCI_DataIN(void *Ptr, int Fcn, int Endpt, int DataTgl, tUSBHostCb Cb, void *Data, size_t Length)
229 return UHCI_int_SendTransaction(Ptr, Fcn*16+Endpt, 0x69, DataTgl, Cb, Data, Length);
232 void *UHCI_DataOUT(void *Ptr, int Fcn, int Endpt, int DataTgl, tUSBHostCb Cb, void *Data, size_t Length)
234 return UHCI_int_SendTransaction(Ptr, Fcn*16+Endpt, 0xE1, DataTgl, Cb, Data, Length);
237 void *UHCI_SendSetup(void *Ptr, int Fcn, int Endpt, int DataTgl, tUSBHostCb Cb, void *Data, size_t Length)
239 return UHCI_int_SendTransaction(Ptr, Fcn*16+Endpt, 0x2D, DataTgl, Cb, Data, Length);
242 int UHCI_IsTransferComplete(void *Ptr, void *Handle)
244 tUHCI_TD *td = Handle;
245 return !(td->Control & (1 << 23));
248 void UHCI_Hub_Poll(tUSBHub *Hub, tUSBDevice *Dev)
250 tUHCI_Controller *cont = USB_GetDeviceDataPtr(Dev);
252 UHCI_CheckPortUpdate(cont);
255 // === INTERNAL FUNCTIONS ===
257 * \fn int UHCI_Int_InitHost(tUCHI_Controller *Host)
258 * \brief Initialises a UHCI host controller
259 * \param Host Pointer - Host to initialise
261 int UHCI_Int_InitHost(tUHCI_Controller *Host)
263 ENTER("pHost", Host);
265 outw( Host->IOBase + USBCMD, 4 ); // GRESET
267 // TODO: Wait for at least 10ms
268 outw( Host->IOBase + USBCMD, 0 ); // GRESET
270 // Allocate Frame List
271 // - 1 Page, 32-bit address
272 // - 1 page = 1024 4 byte entries
273 Host->FrameList = (void *) MM_AllocDMA(1, 32, &Host->PhysFrameList);
274 if( !Host->FrameList ) {
275 Log_Warning("UHCI", "Unable to allocate frame list, aborting");
279 LOG("Allocated frame list 0x%x (0x%x)", Host->FrameList, Host->PhysFrameList);
280 memsetd( Host->FrameList, 1, 1024 ); // Clear List (Disabling all entries)
282 //! \todo Properly fill frame list
284 // Set frame length to 1 ms
285 outb( Host->IOBase + SOFMOD, 64 );
288 outd( Host->IOBase + FLBASEADD, Host->PhysFrameList );
289 outw( Host->IOBase + FRNUM, 0 );
292 outw( Host->IOBase + USBINTR, 0x000F );
293 PCI_ConfigWrite( Host->PciId, 0xC0, 2, 0x2000 );
296 outw( Host->IOBase + USBCMD, 0x0001 );
302 void UHCI_CheckPortUpdate(tUHCI_Controller *Host)
305 for( int i = 0; i < 2; i ++ )
307 int port = Host->IOBase + PORTSC1 + i*2;
308 // Check for port change
309 if( !(inw(port) & 0x0002) ) continue;
312 // Check if the port is connected
313 if( !(inw(port) & 1) )
315 // Tell the USB code it's gone.
316 USB_DeviceDisconnected(Host->RootHub, i);
321 LOG("Port %i has something", i);
322 // Reset port (set bit 9)
324 outw( port, 0x0200 );
325 Time_Delay(50); // 50ms delay
326 outw( port, inw(port) & ~0x0200 );
329 Time_Delay(50); // 50ms delay
330 outw( port, inw(port) | 0x0004 );
331 // Tell USB there's a new device
332 USB_DeviceConnected(Host->RootHub, i);
337 void UHCI_InterruptHandler(int IRQ, void *Ptr)
339 tUHCI_Controller *Host = Ptr;
340 Uint16 status = inw(Host->IOBase + USBSTS);
341 Log_Debug("UHCI", "UHIC Interrupt, status = 0x%x", status);
345 // Interrupt-on-completion
348 outw(Host->IOBase + USBSTS, status);