sis900.inc

MenuetOS是一个用汇编开发的32/64位PC操作系统

   mov      eax, [pci_data]
   mov      [eth_status], eax
   ret
   
;***************************************************************************
; Function: sis_init_rxfilter
;
; Description: sets receive filter address to our MAC address
;
; Arguments:
;
; returns:
;done+
;***************************************************************************
SIS900_init_rxfilter:
   ;****Get Receive Filter Control Register ********
   mov      ebp, [io_addr]	    ; base address
   lea      edx,[ebp+SIS900_rfcr]
   in       eax, dx			    ; get register
   push     eax
   ;****disable packet filtering before setting filter*******
   mov      eax, SIS900_RFEN    ;move receive filter enable flag
   not      eax			        ;1s complement
   pop      ebx			        ;and with our saved register
   and      eax, ebx			;disable receiver
   push     ebx                 ;save filter for another use
   out      dx, eax		        ;set receive disabled
   ;********load MAC addr to filter data register*********
   xor      ecx, ecx
SIS900_RXINT_Mac_Write:
   ;high word of eax tells card which mac byte to write
   mov      eax, ecx					
   lea      edx,[ebp+SIS900_rfcr]
   shl      eax, 16						;
   out      dx, eax						;
   lea      edx,[ebp+SIS900_rfdr]
   mov      ax,  word [node_addr+ecx*2] ; Get Mac ID word
   out      dx, ax						; Send Mac ID
   inc      cl							; send next word
   cmp      cl, 3						; more to send?
   jne      SIS900_RXINT_Mac_Write
   ;********enable packet filitering *****
   pop      eax				    ;old register value
   lea      edx,[ebp+SIS900_rfcr]
   or       eax, SIS900_RFEN    ;enable filtering
   out      dx, eax             ;set register
   ret

;***************************************************************************
;*
;* Function: sis_init_txd
;*
;* Description: initializes the Tx descriptor
;*
;* Arguments:
;*
;* returns:
;*done
;***************************************************************************
SIS900_init_txd:
   ;********** initialize TX descriptor **************
   mov     [txd], dword 0       ;put link to next descriptor in link field
   mov     [txd+4],dword 0      ;clear status field
   mov     [txd+8], dword txb	;save address to buffer ptr field
   ;*************** load Transmit Descriptor Register ***************
   mov     dx, [io_addr]	    ; base address
   add     dx, SIS900_txdp      ; TX Descriptor Pointer
   mov     eax, txd			    ; First Descriptor
   out     dx, eax				; move the pointer
   ret

;***************************************************************************
;* Function: sis_init_rxd
;*
;* Description: initializes the Rx descriptor ring
;*
;* Arguments:
;*
;* Returns:
;*done
;***************************************************************************
SIS900_init_rxd:
   xor      ecx,ecx
   mov      [cur_rx], cl					;Set cuurent rx discriptor to 0
   ;******** init RX descriptors ********
SIS900_init_rxd_Loop:
    mov     eax, ecx					    ;current descriptor
    imul    eax, 12                         ;
    mov     ebx, ecx					    ;determine next link descriptor
    inc     ebx                             ;
    cmp     ebx, NUM_RX_DESC                ;
    jne     SIS900_init_rxd_Loop_0          ;
    xor     ebx, ebx                        ;
SIS900_init_rxd_Loop_0:                    ;
    imul    ebx, 12                         ;
    add     ebx, rxd                        ;
    mov     [rxd+eax], ebx					;save link to next descriptor
    mov     [rxd+eax+4],dword RX_BUFF_SZ	;status bits init to buf size
    mov     ebx, ecx						;find where the buf is located
    imul    ebx,RX_BUFF_SZ                  ;
    add     ebx, rxb                        ;
    mov     [rxd+eax+8], ebx				;save buffer pointer
    inc     ecx							    ;next descriptor
    cmp     ecx, NUM_RX_DESC                ;
    jne     SIS900_init_rxd_Loop            ;
    ;********* load Receive Descriptor Register with address of first 
    ; descriptor*********
    mov     dx, [io_addr]
    add     dx, SIS900_rxdp
    mov     eax, rxd
    out     dx, eax
    ret

;***************************************************************************
;* Function: sis900_set_tx_mode
;*
;* Description:
;*    sets the transmit mode to allow for full duplex
;*
;*
;* Arguments:
;*
;* Returns:
;*
;* Comments:
;*     If you are having problems transmitting packet try changing the
;*     Max DMA Burst, Possible settings are as follows:
;*         0x00000000 = 512 bytes
;*         0x00100000 = 4 bytes
;*         0x00200000 = 8 bytes
;*         0x00300000 = 16 bytes
;*         0x00400000 = 32 bytes
;*         0x00500000 = 64 bytes
;*         0x00600000 = 128 bytes
;*         0x00700000 = 256 bytes
;***************************************************************************
SIS900_set_tx_mode:
   mov      ebp,[io_addr]
   lea      edx,[ebp+SIS900_cr]
   in 	    eax, dx			    ; Get current Command Register
   or 	    eax, SIS900_TxENA   ;Enable Receive
   out 	    dx, eax
   lea      edx,[ebp+SIS900_txcfg]; Transmit config Register offset
   mov      eax, SIS900_ATP		;allow automatic padding
   or       eax, SIS900_HBI		;allow heartbeat ignore
   or       eax, SIS900_CSI		;allow carrier sense ignore
   or       eax, 0x00600000     ;Max DMA Burst
   or       eax, 0x00000100     ;TX Fill Threshold
   or       eax, 0x00000020     ;TX Drain Threshold
   out      dx, eax
   ret

;***************************************************************************
;* Function: sis900_set_rx_mode
;*
;* Description:
;*    sets the receive mode to accept all broadcast packets and packets
;*    with our MAC address, and reject all multicast packets.  Also allows 
;*    full-duplex
;*
;* Arguments:
;*
;* Returns:
;*
;* Comments:
;*     If you are having problems receiving packet try changing the
;*     Max DMA Burst, Possible settings are as follows:
;*         0x00000000 = 512 bytes
;*         0x00100000 = 4 bytes
;*         0x00200000 = 8 bytes
;*         0x00300000 = 16 bytes
;*         0x00400000 = 32 bytes
;*         0x00500000 = 64 bytes
;*         0x00600000 = 128 bytes
;*         0x00700000 = 256 bytes
;***************************************************************************
SIS900_mc_filter: times 16 dw 0
SIS900_set_rx_mode:
   mov      ebp,[io_addr]
    ;**************update Multicast Hash Table in Receive Filter 
   mov      ebx, 0xffff
   xor      cl, cl
SIS900_set_rx_mode_Loop:
   mov      eax, ecx
   shl      eax, 1
   mov      [SIS900_mc_filter+eax], ebx
   lea      edx,[ebp+SIS900_rfcr]	    ; Receive Filter Control Reg offset
   mov      eax, 4					    ;determine table entry
   add      al, cl
   shl      eax, 16
   out      dx, eax					    ;tell card which entry to modify
   lea      edx,[ebp+SIS900_rfdr]	    ; Receive Filter Control Reg offset
   mov      eax, ebx				    ;entry value
   out      dx, ax					    ;write value to table in card
   inc      cl						    ;next entry
   cmp      cl,[sis900_table_entries]   ;
   jl       SIS900_set_rx_mode_Loop
   ;*******Set Receive Filter Control Register*************
   lea      edx,[ebp+SIS900_rfcr]	; Receive Filter Control Register offset
   mov      eax, SIS900_RFAAB		;accecpt all broadcast packets
   or       eax, SIS900_RFAAM		;accept all multicast packets
   or       eax, SIS900_RFAAP		;Accept all packets
   or       eax, SIS900_RFEN		;enable receiver filter
   out      dx, eax
   ;******Enable Receiver************
   lea      edx,[ebp+SIS900_cr] ; Command Register offset
   in 	    eax, dx			    ; Get current Command Register
   or 	    eax, SIS900_RxENA   ;Enable Receive
   out 	    dx, eax
   ;*********Set
   lea      edx,[ebp+SIS900_rxcfg]	; Receive Config Register offset
   mov      eax, SIS900_ATX			;Accept Transmit Packets 
                                    ; (Req for full-duplex and PMD Loopback)
   or       eax, 0x00600000			;Max DMA Burst
   or       eax, 0x00000002			;RX Drain Threshold, 8X8 bytes or 64bytes
   out      dx, eax					;
   ret

;***************************************************************************
; *	SIS960_get_mac_addr: - Get MAC address for SiS962 or SiS963 model
; *	@pci_dev: the sis900 pci device
; *	@net_dev: the net device to get address for
; *
; *	SiS962 or SiS963 model, use EEPROM to store MAC address. And EEPROM
; *	is shared by
; *	LAN and 1394. When access EEPROM, send EEREQ signal to hardware first
; *	and wait for EEGNT. If EEGNT is ON, EEPROM is permitted to be access
; *	by LAN, otherwise is not. After MAC address is read from EEPROM, send
; *	EEDONE signal to refuse EEPROM access by LAN.
; *	The EEPROM map of SiS962 or SiS963 is different to SiS900.
; *	The signature field in SiS962 or SiS963 spec is meaningless.
; *	MAC address is read into @net_dev->dev_addr.
; *done
;*
;* Return 0 is EAX = failure
;*Done+
;***************************************************************************
if defined SIS900_DEBUG
SIS900_Debug_Str_GetMac_Start db 'Attempting to get SIS900 Mac ID: ',13,10,0
SIS900_Debug_Str_GetMac_Failed db 'Access to EEprom Failed',13,10,0
SIS900_Debug_Str_GetMac_Address db 'Your Mac ID is: ',0
SIS900_Debug_Str_GetMac_Address2 db 'Your SIS96x Mac ID is: ',0
end if
SIS960_get_mac_addr:
   mov      ebp,[io_addr]
   ;**********Send Request for eeprom access*********************
   lea      edx,[ebp+SIS900_mear]		; Eeprom access register
   mov      eax, SIS900_EEREQ			; Request access to eeprom
   out      dx, eax						; Send request
   xor      ebx,ebx						;
   ;******Loop 4000 times and if access not granted error out*****
SIS96X_Get_Mac_Wait:
   in       eax, dx					;get eeprom status
   and      eax, SIS900_EEGNT       ;see if eeprom access granted flag is set
   jnz      SIS900_Got_EEP_Access	;if it is, go access the eeprom
   inc      ebx						;else keep waiting
   cmp      ebx, 4000				;have we tried 4000 times yet?
   jl       SIS96X_Get_Mac_Wait	    ;if not ask again
   xor      eax, eax                ;return zero in eax indicating failure
   ;*******Debug **********************
if defined SIS900_DEBUG
   mov esi,SIS900_Debug_Str_GetMac_Failed
   call sys_msg_board_str
end if
   jmp SIS960_get_mac_addr_done
   ;**********EEprom access granted, read MAC from card*************
SIS900_Got_EEP_Access:
    ; zero based so 3-16 bit reads will take place
   mov      ecx, 2						 
SIS96x_mac_read_loop:
   mov      eax, SIS900_EEPROMMACAddr    ;Base Mac Address
   add      eax, ecx				     ;Current Mac Byte Offset
   push     ecx
   call     sis900_read_eeprom           ;try to read 16 bits
   pop      ecx
   mov      [node_addr+ecx*2], ax        ;save 16 bits to the MAC ID varible
   dec      ecx                          ;one less word to read
   jns      SIS96x_mac_read_loop         ;if more read more
   mov      eax, 1                       ;return non-zero indicating success
   ;*******Debug Print MAC ID to debug window**********************
if defined SIS900_DEBUG
   mov esi,SIS900_Debug_Str_GetMac_Address2
   call sys_msg_board_str
   mov edx, node_addr
   call Create_Mac_String
end if
   ;**********Tell EEPROM We are Done Accessing It*********************
SIS960_get_mac_addr_done:
   lea      edx,[ebp+SIS900_mear]		; Eeprom access register
   mov      eax, SIS900_EEDONE           ;tell eeprom we are done
   out 	    dx,eax
   ret
;***************************************************************************
;*	sis900_get_mac_addr: - Get MAC address for stand alone SiS900 model
;*	@pci_dev: the sis900 pci device
;*	@net_dev: the net device to get address for
;*
;*	Older SiS900 and friends, use EEPROM to store MAC address.
;*	MAC address is read from read_eeprom() into @net_dev->dev_addr.
;* done/untested
;***************************************************************************
SIS900_get_mac_addr:
   ;*******Debug **********************
if defined SIS900_DEBUG
   mov esi,SIS900_Debug_Str_GetMac_Start
   call sys_msg_board_str
end if
   ;******** check to see if we have sane EEPROM *******
   mov      eax, SIS900_EEPROMSignature  ;Base Eeprom Signature
   call     sis900_read_eeprom           ;try to read 16 bits
   cmp ax, 0xffff
   je SIS900_Bad_Eeprom
   cmp ax, 0
   je SIS900_Bad_Eeprom
   ;**************Read MacID**************
   ; zero based so 3-16 bit reads will take place
   mov      ecx, 2						 
SIS900_mac_read_loop:
   mov      eax, SIS900_EEPROMMACAddr    ;Base Mac Address
   add      eax, ecx				     ;Current Mac Byte Offset
   push     ecx
   call     sis900_read_eeprom           ;try to read 16 bits
   pop      ecx
   mov      [node_addr+ecx*2], ax        ;save 16 bits to the MAC ID storage
   dec      ecx                          ;one less word to read
   jns      SIS900_mac_read_loop         ;if more read more
   mov      eax, 1                       ;return non-zero indicating success
   ;*******Debug Print MAC ID to debug window**********************
if defined SIS900_DEBUG
   mov esi,SIS900_Debug_Str_GetMac_Address
   call sys_msg_board_str
   mov edx, node_addr
   call Create_Mac_String
end if
   ret
   
SIS900_Bad_Eeprom:
   xor eax, eax
   ;*******Debug **********************
if defined SIS900_DEBUG
   mov esi,SIS900_Debug_Str_GetMac_Failed
   call sys_msg_board_str
end if
   ret
;***************************************************************************
;*	Get_Mac_SIS635_900_REV: - Get MAC address for model 635
;*
;*
;***************************************************************************
Get_Mac_SIS635_900_REV:
if defined SIS900_DEBUG
    mov     esi,SIS900_Debug_Str_GetMac_Start
    call    sys_msg_board_str
end if
    mov     ebp,[io_addr]
    lea     edx,[ebp+SIS900_rfcr]
    in      eax,dx
    mov     edi,eax ; EDI=rfcrSave
    lea     edx,[ebp+SIS900_cr]
    or      eax,SIS900_RELOAD
    out     dx,eax
    xor     eax,eax
    out     dx,eax
    ; Disable packet filtering before setting filter
    lea     edx,[ebp+SIS900_rfcr]
    mov     eax,edi
    and     edi,not SIS900_RFEN
    out     dx,eax
    ; Load MAC to filter data register
    xor     ecx,ecx
    mov     esi,node_addr
.get_mac_loop:
    lea     edx,[ebp+SIS900_rfcr]
    mov     eax,ecx
    shl     eax,SIS900_RFADDR_shift
    out     dx,eax
    lea     edx,[ebp+SIS900_rfdr]
    in      eax,dx
    mov     [esi],ax
    add     esi,2
    inc     ecx
    cmp     ecx,3