$Revision: 425 $
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; SIS900.INC ;;
;; ;;
;; Ethernet driver for Menuet OS ;;
;; ;;
;; Version 0.4 26 April 2004 ;;
;; ;;
;; This driver is based on the SIS900 driver from ;;
;; the etherboot 5.0.6 project. The copyright statement is ;;
;; ;;
;; GNU GENERAL PUBLIC LICENSE ;;
;; Version 2, June 1991 ;;
;; ;;
;; remaining parts Copyright 2004 Jason Delozier, ;;
;; cordata51@hotmail.com ;;
;; ;;
;; See file COPYING for details ;;
;; ;;
;; Updates: ;;
;; Revision Look up table and SIS635 Mac Address by Jarek Pelczar ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;********************************************************************
; Interface
; SIS900_reset
; SIS900_probe
; SIS900_poll
; SIS900_transmit
;
;********************************************************************
;********************************************************************
; Comments:
; Known to work with the following SIS900 ethernet cards:
; - Device ID: 0x0900 Vendor ID: 0x1039 Revision: 0x91
; - Device ID: 0x0900 Vendor ID: 0x1039 Revision: 0x90
;
; If your card is not listed, try it and let me know if it
; functions properly and it will be aded to the list. If not
; we may be able to add support for it.
;
; How To Use:
; Add the following lines to Ethernet.inc in their appropriate locations
;
; include "Sis900.INC"
; dd 0x09001039, SIS900_probe, SIS900_reset, SIS900_poll,
; SIS900_transmit
; dd 0x70161039, SIS900_probe, SIS900_reset, SIS900_poll,
; SIS900_transmit ;untested
;
; ToDo:
; - Enable MII interface for reading speed
; and duplex settings.
;
; - Update Poll routine to support packet fragmentation.
;
; - Add additional support for other sis900 based cards
;
;********************************************************************
; comment the next line out if you don't want debug info printed
; on the debug board. This option adds a lot of bytes to the driver
; so it's worth to comment it out.
; SIS900_DEBUG equ 1
;* buffers and descriptors
cur_rx db 0
NUM_RX_DESC equ 4 ;* Number of RX descriptors *
NUM_TX_DESC equ 1 ;* Number of TX descriptors *
RX_BUFF_SZ equ 1520 ;* Buffer size for each Rx buffer *
TX_BUFF_SZ equ 1516 ;* Buffer size for each Tx buffer *
uglobal
align 4
txd: times (3 * NUM_TX_DESC) dd 0
rxd: times (3 * NUM_RX_DESC) dd 0
endg
txb equ eth_data_start
rxb equ txb + (NUM_TX_DESC * TX_BUFF_SZ)
SIS900_ETH_ALEN equ 6 ;* Size of Ethernet address *
SIS900_ETH_HLEN equ 14 ;* Size of ethernet header *
SIS900_ETH_ZLEN equ 60 ;* Minimum packet length *
SIS900_DSIZE equ 0x00000fff
SIS900_CRC_SIZE equ 4
SIS900_RFADDR_shift equ 16
;SIS900 Symbolic offsets to registers.
SIS900_cr equ 0x0 ; Command Register
SIS900_cfg equ 0x4 ; Configuration Register
SIS900_mear equ 0x8 ; EEPROM Access Register
SIS900_ptscr equ 0xc ; PCI Test Control Register
SIS900_isr equ 0x10 ; Interrupt Status Register
SIS900_imr equ 0x14 ; Interrupt Mask Register
SIS900_ier equ 0x18 ; Interrupt Enable Register
SIS900_epar equ 0x18 ; Enhanced PHY Access Register
SIS900_txdp equ 0x20 ; Transmit Descriptor Pointer Register
SIS900_txcfg equ 0x24 ; Transmit Configuration Register
SIS900_rxdp equ 0x30 ; Receive Descriptor Pointer Register
SIS900_rxcfg equ 0x34 ; Receive Configuration Register
SIS900_flctrl equ 0x38 ; Flow Control Register
SIS900_rxlen equ 0x3c ; Receive Packet Length Register
SIS900_rfcr equ 0x48 ; Receive Filter Control Register
SIS900_rfdr equ 0x4C ; Receive Filter Data Register
SIS900_pmctrl equ 0xB0 ; Power Management Control Register
SIS900_pmer equ 0xB4 ; Power Management Wake-up Event Register
;SIS900 Command Register Bits
SIS900_RELOAD equ 0x00000400
SIS900_ACCESSMODE equ 0x00000200
SIS900_RESET equ 0x00000100
SIS900_SWI equ 0x00000080
SIS900_RxRESET equ 0x00000020
SIS900_TxRESET equ 0x00000010
SIS900_RxDIS equ 0x00000008
SIS900_RxENA equ 0x00000004
SIS900_TxDIS equ 0x00000002
SIS900_TxENA equ 0x00000001
;SIS900 Configuration Register Bits
SIS900_DESCRFMT equ 0x00000100 ; 7016 specific
SIS900_REQALG equ 0x00000080
SIS900_SB equ 0x00000040
SIS900_POW equ 0x00000020
SIS900_EXD equ 0x00000010
SIS900_PESEL equ 0x00000008
SIS900_LPM equ 0x00000004
SIS900_BEM equ 0x00000001
SIS900_RND_CNT equ 0x00000400
SIS900_FAIR_BACKOFF equ 0x00000200
SIS900_EDB_MASTER_EN equ 0x00002000
;SIS900 Eeprom Access Reigster Bits
SIS900_MDC equ 0x00000040
SIS900_MDDIR equ 0x00000020
SIS900_MDIO equ 0x00000010 ; 7016 specific
SIS900_EECS equ 0x00000008
SIS900_EECLK equ 0x00000004
SIS900_EEDO equ 0x00000002
SIS900_EEDI equ 0x00000001
;SIS900 TX Configuration Register Bits
SIS900_ATP equ 0x10000000 ;Automatic Transmit Padding
SIS900_MLB equ 0x20000000 ;Mac Loopback Enable
SIS900_HBI equ 0x40000000 ;HeartBeat Ignore (Req for full-dup)
SIS900_CSI equ 0x80000000 ;CarrierSenseIgnore (Req for full-du
;SIS900 RX Configuration Register Bits
SIS900_AJAB equ 0x08000000 ;
SIS900_ATX equ 0x10000000 ;Accept Transmit Packets
SIS900_ARP equ 0x40000000 ;accept runt packets (<64bytes)
SIS900_AEP equ 0x80000000 ;accept error packets
;SIS900 Interrupt Reigster Bits
SIS900_WKEVT equ 0x10000000
SIS900_TxPAUSEEND equ 0x08000000
SIS900_TxPAUSE equ 0x04000000
SIS900_TxRCMP equ 0x02000000
SIS900_RxRCMP equ 0x01000000
SIS900_DPERR equ 0x00800000
SIS900_SSERR equ 0x00400000
SIS900_RMABT equ 0x00200000
SIS900_RTABT equ 0x00100000
SIS900_RxSOVR equ 0x00010000
SIS900_HIBERR equ 0x00008000
SIS900_SWINT equ 0x00001000
SIS900_MIBINT equ 0x00000800
SIS900_TxURN equ 0x00000400
SIS900_TxIDLE equ 0x00000200
SIS900_TxERR equ 0x00000100
SIS900_TxDESC equ 0x00000080
SIS900_TxOK equ 0x00000040
SIS900_RxORN equ 0x00000020
SIS900_RxIDLE equ 0x00000010
SIS900_RxEARLY equ 0x00000008
SIS900_RxERR equ 0x00000004
SIS900_RxDESC equ 0x00000002
SIS900_RxOK equ 0x00000001
;SIS900 Interrupt Enable Reigster Bits
SIS900_IE equ 0x00000001
;SIS900 Revision ID
SIS900B_900_REV equ 0x03
SIS630A_900_REV equ 0x80
SIS630E_900_REV equ 0x81
SIS630S_900_REV equ 0x82
SIS630EA1_900_REV equ 0x83
SIS630ET_900_REV equ 0x84
SIS635A_900_REV equ 0x90
SIS900_960_REV equ 0x91
;SIS900 Receive Filter Control Register Bits
SIS900_RFEN equ 0x80000000
SIS900_RFAAB equ 0x40000000
SIS900_RFAAM equ 0x20000000
SIS900_RFAAP equ 0x10000000
SIS900_RFPromiscuous equ 0x70000000
;SIS900 Reveive Filter Data Mask
SIS900_RFDAT equ 0x0000FFFF
;SIS900 Eeprom Address
SIS900_EEPROMSignature equ 0x00
SIS900_EEPROMVendorID equ 0x02
SIS900_EEPROMDeviceID equ 0x03
SIS900_EEPROMMACAddr equ 0x08
SIS900_EEPROMChecksum equ 0x0b
;The EEPROM commands include the alway-set leading bit.
;SIS900 Eeprom Command
SIS900_EEread equ 0x0180
SIS900_EEwrite equ 0x0140
SIS900_EEerase equ 0x01C0
SIS900_EEwriteEnable equ 0x0130
SIS900_EEwriteDisable equ 0x0100
SIS900_EEeraseAll equ 0x0120
SIS900_EEwriteAll equ 0x0110
SIS900_EEaddrMask equ 0x013F
SIS900_EEcmdShift equ 16
;For SiS962 or SiS963, request the eeprom software access
SIS900_EEREQ equ 0x00000400
SIS900_EEDONE equ 0x00000200
SIS900_EEGNT equ 0x00000100
;General Varibles
SIS900_pci_revision: db 0
SIS900_Status dd 0x03000000
sis900_specific_table:
; dd SIS630A_900_REV,Get_Mac_SIS630A_900_REV,0
; dd SIS630E_900_REV,Get_Mac_SIS630E_900_REV,0
dd SIS630S_900_REV,Get_Mac_SIS635_900_REV,0
dd SIS630EA1_900_REV,Get_Mac_SIS635_900_REV,0
dd SIS630ET_900_REV,Get_Mac_SIS635_900_REV,0;SIS630ET_900_REV_SpecialFN
dd SIS635A_900_REV,Get_Mac_SIS635_900_REV,0
dd SIS900_960_REV,SIS960_get_mac_addr,0
dd SIS900B_900_REV,SIS900_get_mac_addr,0
dd 0,0,0,0 ; end of list
sis900_get_mac_func: dd 0
sis900_special_func: dd 0
sis900_table_entries: db 8
;***************************************************************************
; Function
; SIS900_probe
; Description
; Searches for an ethernet card, enables it and clears the rx buffer
; If a card was found, it enables the ethernet -> TCPIP link
;not done - still need to probe mii transcievers
;***************************************************************************
if defined SIS900_DEBUG
SIS900_Debug_Str_Unsupported db 'Sorry your card is unsupported ',13,10,0
end if
SIS900_probe:
;******Wake Up Chip*******
mov al, 4
mov bh, [pci_dev]
mov ecx, 0
mov ah, [pci_bus]
mov bl, 0x40
call pci_write_reg
;*******Set some PCI Settings*********
call SIS900_adjust_pci_device
;*****Get Card Revision******
mov al, 1 ;one byte to read
mov bh, [pci_dev]
mov ah, [pci_bus]
mov bl, 0x08 ;Revision Register
call pci_read_reg
mov [SIS900_pci_revision], al ;save the revision for later use
;****** Look up through the sis900_specific_table
mov esi,sis900_specific_table
.probe_loop:
cmp dword [esi],0 ; Check if we reached end of the list
je .probe_loop_failed
cmp al,[esi] ; Check if revision is OK
je .probe_loop_ok
add esi,12 ; Advance to next entry
jmp .probe_loop
.probe_loop_failed:
jmp SIS900_Probe_Unsupported
;*********Find Get Mac Function*********
.probe_loop_ok:
mov eax,[esi+4] ; Get pointer to "get MAC" function
mov [sis900_get_mac_func],eax
mov eax,[esi+8] ; Get pointer to special initialization fn
mov [sis900_special_func],eax
;******** Get MAC ********
call dword [sis900_get_mac_func]
;******** Call special initialization fn if requested ********
cmp dword [sis900_special_func],0
je .no_special_init
call dword [sis900_special_func]
.no_special_init:
;******** Set table entries ********
mov al,[SIS900_pci_revision]
cmp al,SIS635A_900_REV
jae .ent16
cmp al,SIS900B_900_REV
je .ent16
jmp .ent8
.ent16:
mov byte [sis900_table_entries],16
.ent8:
;*******Probe for mii transceiver*******
;TODO!!*********************
;*******Initialize Device*******
call sis900_init
ret
SIS900_Probe_Unsupported:
if defined SIS900_DEBUG
mov esi, SIS900_Debug_Str_Unsupported
call sys_msg_board_str
end if
ret
;***************************************************************************
; Function: sis900_init
;
; Description: resets the ethernet controller chip and various
; data structures required for sending and receiving packets.
;
; Arguments:
;
; returns: none
;not done
;***************************************************************************
sis900_init:
call SIS900_reset ;Done
call SIS900_init_rxfilter ;Done
call SIS900_init_txd ;Done
call SIS900_init_rxd ;Done
call SIS900_set_rx_mode ;done
call SIS900_set_tx_mode
;call SIS900_check_mode
ret
;***************************************************************************
; Function
; SIS900_reset
; Description
; disables interrupts and soft resets the controller chip
;
;done+
;***************************************************************************
if defined SIS900_DEBUG
SIS900_Debug_Reset_Failed db 'Reset Failed ',0
end if
SIS900_reset:
;******Disable Interrupts and reset Receive Filter*******
mov ebp, [io_addr] ; base address
xor eax, eax ; 0 to initialize
lea edx,[ebp+SIS900_ier]
out dx, eax ; Write 0 to location
lea edx,[ebp+SIS900_imr]
out dx, eax ; Write 0 to location
lea edx,[ebp+SIS900_rfcr]
out dx, eax ; Write 0 to location
;*******Reset Card***********************************************
lea edx,[ebp+SIS900_cr]
in eax, dx ; Get current Command Register
or eax, SIS900_RESET ; set flags
or eax, SIS900_RxRESET ;
or eax, SIS900_TxRESET ;
out dx, eax ; Write new Command Register
;*******Wait Loop************************************************
lea edx,[ebp+SIS900_isr]
mov ecx, [SIS900_Status] ; Status we would like to see from card
mov ebx, 2001 ; only loop 1000 times
SIS900_Wait:
dec ebx ; 1 less loop
jz SIS900_DoneWait_e ; 1000 times yet?
in eax, dx ; move interrup status to eax
and eax, ecx
xor ecx, eax
jz SIS900_DoneWait
jmp SIS900_Wait
SIS900_DoneWait_e:
if defined SIS900_DEBUG
mov esi, SIS900_Debug_Reset_Failed
call sys_msg_board_str
end if
SIS900_DoneWait:
;*******Set Configuration Register depending on Card Revision********
lea edx,[ebp+SIS900_cfg]
mov eax, SIS900_PESEL ; Configuration Register Bit
mov bl, [SIS900_pci_revision] ; card revision
mov cl, SIS635A_900_REV ; Check card revision
cmp bl, cl
je SIS900_RevMatch
mov cl, SIS900B_900_REV ; Check card revision
cmp bl, cl
je SIS900_RevMatch
out dx, eax ; no revision match
jmp SIS900_Reset_Complete
SIS900_RevMatch: ; Revision match
or eax, SIS900_RND_CNT ; Configuration Register Bit
out dx, eax
SIS900_Reset_Complete:
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
jne .get_mac_loop
; Enable packet filtering
;lea edx,[ebp+SIS900_rfcr]
;mov eax,edi
;or eax,SIS900_RFEN
;out dx, eax
;*******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
;***************************************************************************
;* Function: sis900_read_eeprom
;*
;* Description: reads and returns a given location from EEPROM
;*
;* Arguments: eax - location: requested EEPROM location
;*
;* Returns: eax : contents of requested EEPROM location
;*
; Read Serial EEPROM through EEPROM Access Register, Note that location is
; in word (16 bits) unit */
;done+
;***************************************************************************
sis900_read_eeprom:
push esi
push edx
push ecx
push ebx
mov ebp,[io_addr]
mov ebx, eax ;location of Mac byte to read
or ebx, SIS900_EEread ;
lea edx,[ebp+SIS900_mear] ; Eeprom access register
xor eax, eax ; start send
out dx,eax
call SIS900_Eeprom_Delay_1
mov eax, SIS900_EECLK
out dx, eax
call SIS900_Eeprom_Delay_1
;************ Shift the read command (9) bits out. *********
mov cl, 8 ;
sis900_read_eeprom_Send:
mov eax, 1
shl eax, cl
and eax, ebx
jz SIS900_Read_Eeprom_8
mov eax, 9
jmp SIS900_Read_Eeprom_9
SIS900_Read_Eeprom_8:
mov eax, 8
SIS900_Read_Eeprom_9:
out dx, eax
call SIS900_Eeprom_Delay_1
or eax, SIS900_EECLK
out dx, eax
call SIS900_Eeprom_Delay_1
cmp cl, 0
je sis900_read_eeprom_Send_Done
dec cl
jmp sis900_read_eeprom_Send
;*********************
sis900_read_eeprom_Send_Done:
mov eax, SIS900_EECS ;
out dx, eax
call SIS900_Eeprom_Delay_1
;********** Read 16-bits of data in ***************
mov cx, 16 ;16 bits to read
sis900_read_eeprom_Send2:
mov eax, SIS900_EECS
out dx, eax
call SIS900_Eeprom_Delay_1
or eax, SIS900_EECLK
out dx, eax
call SIS900_Eeprom_Delay_1
in eax, dx
shl ebx, 1
and eax, SIS900_EEDO
jz SIS900_Read_Eeprom_0
or ebx, 1
SIS900_Read_Eeprom_0:
dec cx
jnz sis900_read_eeprom_Send2
;************** Terminate the EEPROM access. **************
xor eax, eax
out dx, eax
call SIS900_Eeprom_Delay_1
mov eax, SIS900_EECLK
out dx, eax
mov eax, ebx
and eax, 0x0000ffff ;return only 16 bits
pop ebx
pop ecx
pop edx
pop esi
ret
;***************************************************************************
; Function
; SIS900_Eeprom_Delay_1
; Description
;
;
;
;
;***************************************************************************
SIS900_Eeprom_Delay_1:
push eax
in eax, dx
pop eax
ret
;***************************************************************************
; Function
; SIS900_poll
; Description
; polls card to see if there is a packet waiting
;
; Currently only supports one descriptor per packet, if packet is fragmented
; between multiple descriptors you will lose part of the packet
;***************************************************************************
if defined SIS900_DEBUG
SIS900_Debug_Pull_Packet_good db 'Good Packet Waiting: ',13,10,0
SIS900_Debug_Pull_Bad_Packet_Status db 'Bad Packet Waiting: Status',13,10,0
SIS900_Debug_Pull_Bad_Packet_Size db 'Bad Packet Waiting: Size',13,10,0
end if
SIS900_poll:
;**************Get Status **************
xor eax, eax ;get RX_Status
mov [eth_rx_data_len], ax
mov al, [cur_rx] ;find current discriptor
imul eax, 12 ;
mov ecx, [rxd+eax+4] ; get receive status
;**************Check Status **************
mov ebx, ecx ;move status
;Check RX_Status to see if packet is waiting
and ebx, 0x80000000
jnz SIS900_poll_IS_packet
ret
;**********There is a packet waiting check it for errors**************
SIS900_poll_IS_packet:
mov ebx, ecx ;move status
and ebx, 0x67C0000 ;see if there are any errors
jnz SIS900_Poll_Error_Status
;**************Check size of packet*************
and ecx, SIS900_DSIZE ;get packet size minus CRC
cmp cx, SIS900_CRC_SIZE
;make sure packet contains data
jle SIS900_Poll_Error_Size
;*******Copy Good Packet to receive buffer******
sub cx, SIS900_CRC_SIZE ;dont want crc
mov word [eth_rx_data_len], cx ;save size of packet
;**********Continue copying packet****************
push ecx
; first copy dword-wise, divide size by 4
shr ecx, 2
mov esi, [rxd+eax+8] ; set source
mov edi, Ether_buffer ; set destination
cld ; clear direction
rep movsd ; copy the dwords
pop ecx
and ecx, 3 ;
rep movsb
;********Debug, tell user we have a good packet*************
if defined SIS900_DEBUG
mov esi, SIS900_Debug_Pull_Packet_good
call sys_msg_board_str
end if
jmp SIS900_Poll_Cnt ;
;*************Error occured let user know through debug window***********
SIS900_Poll_Error_Status:
if defined SIS900_DEBUG
mov esi, SIS900_Debug_Pull_Bad_Packet_Status
call sys_msg_board_str
end if
jmp SIS900_Poll_Cnt
SIS900_Poll_Error_Size:
if defined SIS900_DEBUG
mov esi, SIS900_Debug_Pull_Bad_Packet_Size
call sys_msg_board_str
end if
;*************Increment to next available descriptor**************
SIS900_Poll_Cnt:
;Reset status, allow ethernet card access to descriptor
mov ecx, RX_BUFF_SZ
mov [rxd+eax+4], ecx ;
inc [cur_rx] ;get next descriptor
and [cur_rx],3 ;only 4 descriptors 0-3
;******Enable Receiver************
mov ebp, [io_addr] ; Base Address
lea edx,[ebp+SIS900_cr] ; Command Register offset
in eax, dx ; Get current Command Register
or eax, SIS900_RxENA ;Enable Receive
out dx, eax
ret
;***************************************************************************
; Function
; SIS900_transmit
; Description
; Transmits a packet of data via the ethernet card
; Pointer to 48 bit destination address in edi
; Type of packet in bx
; size of packet in ecx
; pointer to packet data in esi
;
; only one transmit descriptor is used
;
;***************************************************************************
if defined SIS900_DEBUG
SIS900_Debug_Transmit_Packet db 'Transmitting Packet: ',13,10,0
SIS900_Debug_Transmit_Packet_Err db 'Transmitting Packet Error: ',13,10,0
end if
SIS900_transmit:
mov ebp, [io_addr] ; Base Address
;******** Stop the transmitter ********
lea edx,[ebp+SIS900_cr] ; Command Register offset
in eax, dx ; Get current Command Register
or eax, SIS900_TxDIS ; Disable Transmitter
out dx, eax
;*******load Transmit Descriptor Register *******
lea edx,[ebp+SIS900_txdp]
mov eax, txd
out dx, eax
;******* copy packet to descriptor*******
push esi
mov esi, edi ;copy destination addess
mov edi, txb
cld
movsd
movsw
mov esi, node_addr ;copy my mac address
movsd
movsw
mov [edi], bx ;copy packet type
add edi, 2
pop esi ;restore pointer to source of packet
push ecx ;save packet size
shr ecx, 2 ;divide by 4, size in bytes send in dwords
rep movsd ;copy data to decriptor
pop ecx ;restore packet size
push ecx ;save packet size
and ecx, 3 ;last three bytes if not a multiple of 4
rep movsb
;**************set length tag**************
pop ecx ;restore packet size
add ecx, SIS900_ETH_HLEN ;add header to length
and ecx, SIS900_DSIZE ;
;**************pad to minimum packet size **************not needed
;cmp ecx, SIS900_ETH_ZLEN
;jge SIS900_transmit_Size_Ok
;push ecx
;mov ebx, SIS900_ETH_ZLEN
;sub ebx, ecx
;mov ecx, ebx
;rep movsb
;pop ecx
SIS900_transmit_Size_Ok:
mov [txd+4], dword 0x80000000 ;card owns descriptor
or [txd+4], ecx ;set size of packet
if defined SIS900_DEBUG
mov esi, SIS900_Debug_Transmit_Packet
call sys_msg_board_str
end if
;***************restart the transmitter ********
lea edx,[ebp+SIS900_cr]
in eax, dx ; Get current Command Register
or eax, SIS900_TxENA ; Enable Transmitter
out dx, eax
;****make sure packet transmitted successfully****
; mov esi,10
; call delay_ms
mov eax, [txd+4]
and eax, 0x6200000
jz SIS900_transmit_OK
;**************Tell user there was an error through debug window
if defined SIS900_DEBUG
mov esi, SIS900_Debug_Transmit_Packet_Err
call sys_msg_board_str
end if
SIS900_transmit_OK:
;******** Disable interrupts by clearing the interrupt mask. ********
lea edx,[ebp+SIS900_imr] ; Interupt Mask Register
xor eax, eax
out dx,eax
ret
;***************************************************************************
;* Function: Create_Mac_String
;*
;* Description: Converts the 48 bit value to a string for display
;*
;* String Format: XX:XX:XX:XX:XX:XX
;*
;* Arguments: node_addr is location of 48 bit MAC ID
;*
;* Returns: Prints string to general debug window
;*
;*
;done
;***************************************************************************
if defined SIS900_DEBUG
SIS900_Char_String db '0','1','2','3','4','5','6','7','8','9'
db 'A','B','C','D','E','F'
Mac_str_build: times 20 db 0
Create_Mac_String:
pusha
xor ecx, ecx
Create_Mac_String_loop:
mov al,byte [edx+ecx];[node_addr+ecx]
push eax
shr eax, 4
and eax, 0x0f
mov bl, byte [SIS900_Char_String+eax]
mov [Mac_str_build+ecx*3], bl
pop eax
and eax, 0x0f
mov bl, byte [SIS900_Char_String+eax]
mov [Mac_str_build+1+ecx*3], bl
cmp ecx, 5
je Create_Mac_String_done
mov bl, ':'
mov [Mac_str_build+2+ecx*3], bl
inc ecx
jmp Create_Mac_String_loop
Create_Mac_String_done: ;Insert CR and Zero Terminate
mov [Mac_str_build+2+ecx*3],byte 13
mov [Mac_str_build+3+ecx*3],byte 10
mov [Mac_str_build+4+ecx*3],byte 0
mov esi, Mac_str_build
call sys_msg_board_str ;Print String to message board
popa
ret
end if
;***************************************************************************
;* Set device to be a busmaster in case BIOS neglected to do so.
;* Also adjust PCI latency timer to a reasonable value, 64.
;***************************************************************************
SIS900_adjust_pci_device:
;*******Get current setting************************
mov al, 2 ;read a word
mov bh, [pci_dev]
mov ah, [pci_bus]
mov bl, 0x04 ;from command Register
call pci_read_reg
;******see if its already set as bus master********
mov bx, ax
and bx,5
cmp bx,5
je SIS900_adjust_pci_device_Latency
;******Make card a bus master*******
mov cx, ax ;value to write
mov bh, [pci_dev]
mov al, 2 ;write a word
or cx,5
mov ah, [pci_bus]
mov bl, 0x04 ;to command register
call pci_write_reg
;******Check latency setting***********
SIS900_adjust_pci_device_Latency:
;*******Get current latency setting************************
mov al, 1 ;read a byte
mov bh, [pci_dev]
mov ah, [pci_bus]
mov bl, 0x0D ;from Lantency Timer Register
call pci_read_reg
;******see if its aat least 64 clocks********
cmp ax,64
jge SIS900_adjust_pci_device_Done
;******Set latency to 32 clocks*******
mov cx, 64 ;value to write
mov bh, [pci_dev]
mov al, 1 ;write a byte
mov ah, [pci_bus]
mov bl, 0x0D ;to Lantency Timer Register
call pci_write_reg
;******Check latency setting***********
SIS900_adjust_pci_device_Done:
ret