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  1. ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  2. ;;                                                                    ;;
  3. ;; Copyright (C) KolibriOS team 2004-2009. All rights reserved.       ;;
  4. ;; Distributed under terms of the GNU General Public License          ;;
  5. ;;                                                                    ;;
  6. ;;  Ethernet driver for KolibriOS                                     ;;
  7. ;;  This is an adaptation of MenuetOS driver with minimal changes.    ;;
  8. ;;  Changes were made by CleverMouse. Original copyright follows.     ;;
  9. ;;                                                                    ;;
  10. ;;  This driver is based on the SIS900 driver from                    ;;
  11. ;;  the etherboot 5.0.6 project. The copyright statement is           ;;
  12. ;;                                                                    ;;
  13. ;;          GNU GENERAL PUBLIC LICENSE                                ;;
  14. ;;             Version 2, June 1991                                   ;;
  15. ;;                                                                    ;;
  16. ;;  remaining parts Copyright 2004 Jason Delozier,                    ;;
  17. ;;   cordata51@hotmail.com                                            ;;
  18. ;;                                                                    ;;
  19. ;;  See file COPYING for details                                      ;;
  20. ;;                                                                    ;;
  21. ;;  Updates:                                                          ;;
  22. ;;    Revision Look up table and SIS635 Mac Address by Jarek Pelczar  ;;
  23. ;;                                                                    ;;
  24. ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  25.  
  26. ; $Revision: 1514 $
  27.  
  28. format MS COFF
  29.  
  30.         API_VERSION             equ 0x01000100
  31.  
  32.         DEBUG                   equ 1
  33.         __DEBUG__               equ 1
  34.         __DEBUG_LEVEL__         equ 1
  35.  
  36. include 'proc32.inc'
  37. include 'imports.inc'
  38. include 'fdo.inc'
  39. include 'netdrv.inc'
  40.  
  41. public START
  42. public version
  43.  
  44. NUM_RX_DESC    equ    4               ;* Number of RX descriptors *
  45. NUM_TX_DESC    equ    1               ;* Number of TX descriptors *
  46. RX_BUFF_SZ          equ    1520            ;* Buffer size for each Rx buffer *
  47. TX_BUFF_SZ          equ    1516            ;* Buffer size for each Tx buffer *
  48. MAX_ETH_FRAME_SIZE  equ    1516
  49.  
  50. TOTAL_BUFFERS_SIZE equ NUM_RX_DESC*RX_BUFF_SZ + NUM_TX_DESC*TX_BUFF_SZ
  51.  
  52. virtual at 0
  53.         device:
  54.  
  55.         ETH_DEVICE
  56.  
  57. ; device specific
  58.       .io_addr          dd ?
  59.       .pci_bus          db ?
  60.       .pci_dev          db ?
  61.       .irq_line         db ?
  62.       .cur_rx           db ?
  63.       .pci_revision     db ?
  64.       .table_entries:   db ?
  65. align 4
  66.       .special_func:    dd 0
  67.       .txd: times (3 * NUM_TX_DESC) dd 0
  68.       .rxd: times (3 * NUM_RX_DESC) dd 0
  69.       .size:
  70. end virtual
  71.  
  72. ; First page is designated to ETH_DEVICE, buffers start from second
  73. ALLOCATION_SIZE = ((device.size+0FFFh) and not 0FFFh) + TOTAL_BUFFERS_SIZE
  74. ; Note that buffers must be contiguous in the physical memory;
  75. ; because KernelAlloc allocates contiguous physical pages only in 8-pages blocks,
  76. ; align ALLOCATION_SIZE up to 8*(page size) = 8000h
  77. ALLOCATION_SIZE = (ALLOCATION_SIZE + 7FFFh) and not 7FFFh
  78.  
  79. MAX_DEVICES = 16        ; maximum number of devices which this driver can handle
  80.  
  81.  
  82.         PCI_HEADER_TYPE               equ 0x0e  ;8 bit
  83.         PCI_BASE_ADDRESS_0            equ 0x10  ;32 bit
  84.         PCI_BASE_ADDRESS_5            equ 0x24  ;32 bits
  85.         PCI_BASE_ADDRESS_SPACE_IO     equ 0x01
  86.         PCI_VENDOR_ID                 equ 0x00  ;16 bit
  87.         PCI_BASE_ADDRESS_IO_MASK      equ 0xFFFFFFFC
  88.  
  89. section '.flat' code readable align 16
  90.  
  91. ; Driver entry point - register our service when the driver is loading.
  92. ; TODO: add needed operations when unloading
  93. START:
  94.         cmp     dword [esp+4], 1
  95.         jne     .exit
  96.         stdcall RegService, my_service, service_proc
  97.         ret     4
  98. .exit:
  99.         xor     eax, eax
  100.         ret     4
  101.  
  102. ; Service procedure for the driver - handle all I/O requests for the driver.
  103. ; Currently handled requests are: SRV_GETVERSION = 0 and SRV_HOOK = 1.
  104. service_proc:
  105. ; 1. Get parameter from the stack: [esp+4] is the first parameter,
  106. ;       pointer to IOCTL structure.
  107.         mov     edx, [esp+4]    ; edx -> IOCTL
  108. ; 2. Get request code and select a handler for the code.
  109.         mov     eax, [edx+IOCTL.io_code]
  110.         test    eax, eax        ; check for SRV_GETVERSION
  111.         jnz     @f
  112. ; 3. This is SRV_GETVERSION request, no input, 4 bytes output, API_VERSION.
  113. ; 3a. Output size must be at least 4 bytes.
  114.         cmp     [edx+IOCTL.out_size], 4
  115.         jl      .fail
  116. ; 3b. Write result to the output buffer.
  117.         mov     eax, [edx+IOCTL.output]
  118.         mov     [eax], dword API_VERSION
  119. ; 3c. Return success.
  120.         xor     eax, eax
  121.         ret     4
  122. @@:
  123.         dec     eax     ; check for SRV_HOOK
  124.         jnz     .fail
  125. ; 4. This is SRV_HOOK request, input defines the device to hook, no output.
  126. ; 4a. The driver works only with PCI devices,
  127. ;       so input must be at least 3 bytes long.
  128.         cmp     [edx + IOCTL.inp_size], 3
  129.         jl      .fail
  130. ; 4b. First byte of input is bus type, 1 stands for PCI.
  131.         mov     eax, [edx + IOCTL.input]
  132.         cmp     byte [eax], 1
  133.         jne     .fail
  134. ; 4c. Second and third bytes of the input define the device: bus and dev.
  135. ;       Word in bx holds both bytes.
  136.         mov     bx, [eax+1]
  137. ; 4d. Check if the device was already hooked,
  138. ;       scan through the list of known devices.
  139.         mov     esi, DEV_LIST
  140.         mov     ecx, [NUM_DEV]
  141.         test    ecx, ecx
  142.         jz      .firstdevice
  143.   .nextdevice:
  144.         lodsd
  145.         cmp     bx, word [eax + device.pci_bus]
  146.         je      .find_devicenum
  147.         loop    .nextdevice
  148. ; 4e. This device doesn't have its own eth_device structure yet, let's create one
  149.   .firstdevice:
  150. ; 4f. Check that we have place for new device.
  151.         cmp     [NUM_DEV], MAX_DEVICES
  152.         jge     .fail
  153. ; 4g. Allocate memory for device descriptor and receive+transmit buffers.
  154.         stdcall KernelAlloc, ALLOCATION_SIZE
  155.         test    eax, eax
  156.         jz      .fail
  157. ; 4h. Zero the structure.
  158.         push    eax
  159.         mov     edi, eax
  160.         mov     ecx, (device.size + 3) shr 2
  161.         xor     eax, eax
  162.         rep     stosd
  163.         pop     eax
  164. ; 4i. Save PCI coordinates, loaded to bx at 4c.
  165.         mov     word [eax+device.pci_bus], bx
  166.         mov     ebx, eax                                ; ebx is always used as a pointer to the structure (in driver, but also in kernel code)
  167. ; 4j. Fill in the direct call addresses into the struct.
  168. ; Note that get_MAC pointer is filled in initialization by SIS900_probe.
  169.         mov     dword [ebx+device.reset], sis900_init
  170.         mov     dword [ebx+device.transmit], transmit
  171. ;       mov     dword [ebx+device.get_MAC], read_mac
  172.         mov     dword [ebx+device.set_MAC], write_mac
  173.         mov     dword [ebx+device.unload], unload
  174.         mov     dword [ebx+device.name], my_service
  175.  
  176. ; 4k. Now, it's time to find the base io addres of the PCI device
  177. ; TODO: implement check if bus and dev exist on this machine
  178.  
  179.         mov     edx, PCI_BASE_ADDRESS_0
  180. .reg_check:
  181.         push    edx
  182.         stdcall PciRead16, dword [ebx+device.pci_bus], dword [ebx+device.pci_dev], edx
  183.         pop     edx
  184.         test    al, PCI_BASE_ADDRESS_SPACE_IO
  185.         jz      .inc_reg
  186.         and     eax, PCI_BASE_ADDRESS_IO_MASK
  187.         jnz     .got_io
  188.  
  189.   .inc_reg:
  190.         add     edx, 4
  191.         cmp     edx, PCI_BASE_ADDRESS_5
  192.         jbe     .reg_check
  193.         jmp     .fail
  194.  
  195.   .got_io:
  196.         mov     [ebx+device.io_addr], eax
  197.  
  198. ; 4l. We've found the io address, find IRQ now
  199.         stdcall PciRead8, dword [ebx+device.pci_bus], dword [ebx+device.pci_dev], 0x3c
  200.         mov     byte [ebx+device.irq_line], al
  201.  
  202. ; 4m. Add new device to the list (required for int_handler).
  203.         mov     eax, [NUM_DEV]
  204.         mov     [DEV_LIST+4*eax], ebx
  205.         inc     [NUM_DEV]
  206.  
  207. ; 4m. Ok, the eth_device structure is ready, let's probe the device
  208.  
  209.         call    SIS900_probe
  210.         test    eax, eax
  211.         jnz     .destroy
  212. ; 4n. If device was successfully initialized, register it for the kernel.
  213.  
  214.         mov     [device.type], NET_TYPE_ETH
  215.         call    NetRegDev
  216.  
  217.         cmp     eax, -1
  218.         je      .destroy
  219.  
  220.         ret     4
  221.  
  222. ; 5. If the device was already loaded, find the device number and return it in eax
  223.  
  224.   .find_devicenum:
  225.         mov     ebx, eax
  226.         call    NetPtrToNum                                             ; This kernel procedure converts a pointer to device struct in ebx
  227.                                                                         ; into a device number in edi
  228.         mov     eax, edi                                                ; Application wants it in eax instead
  229.         ret     4
  230.  
  231. ; If an error occured, remove all allocated data and exit (returning -1 in eax)
  232.  
  233.   .destroy:
  234.         dec     [NUM_DEV]
  235.         ; todo: reset device into virgin state
  236.  
  237.   .err:
  238.         stdcall KernelFree, ebx
  239.  
  240.  
  241.   .fail:
  242.         xor     eax, eax
  243.         ret     4
  244.  
  245.  
  246. ;;/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\;;
  247. ;;                                                                        ;;
  248. ;;        Actual Hardware dependent code starts here                      ;;
  249. ;;                                                                        ;;
  250. ;;/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\;;
  251.  
  252. unload:
  253.         ; TODO: (in this particular order)
  254.         ;
  255.         ; - Stop the device
  256.         ; - Detach int handler
  257.         ; - Remove device from local list
  258.         ; - call unregister function in kernel
  259.         ; - Remove all allocated structures and buffers the card used
  260.  
  261.         or      eax,-1
  262.  
  263. ret
  264.  
  265. ;********************************************************************
  266. ;   Interface
  267. ;      SIS900_reset
  268. ;      SIS900_probe
  269. ;      SIS900_poll
  270. ;      SIS900_transmit
  271. ;
  272. ;********************************************************************
  273. ;********************************************************************
  274. ;  Comments:
  275. ;    Known to work with the following SIS900 ethernet cards:
  276. ;      -  Device ID: 0x0900   Vendor ID: 0x1039   Revision: 0x91
  277. ;      -  Device ID: 0x0900   Vendor ID: 0x1039   Revision: 0x90
  278. ;
  279. ;    If your card is not listed, try it and let me know if it
  280. ;    functions properly and it will be aded to the list.  If not
  281. ;    we may be able to add support for it.
  282. ;
  283. ;  ToDo:
  284. ;     -  Enable MII interface for reading speed
  285. ;        and duplex settings.
  286. ;
  287. ;     -  Update Poll routine to support packet fragmentation.
  288. ;
  289. ;     -  Add additional support for other sis900 based cards
  290. ;
  291. ;********************************************************************
  292.  
  293. ; comment the next line out if you don't want debug info printed
  294. ; on the debug board. This option adds a lot of bytes to the driver
  295. ; so it's worth to comment it out.
  296. ;        SIS900_DEBUG equ 1
  297.  
  298. SIS900_ETH_ALEN equ     6       ;* Size of Ethernet address *
  299. SIS900_ETH_HLEN equ     14      ;* Size of ethernet header *
  300. SIS900_ETH_ZLEN equ     60      ;* Minimum packet length *
  301. SIS900_DSIZE equ 0x00000fff
  302. SIS900_CRC_SIZE equ 4
  303. SIS900_RFADDR_shift equ 16
  304. ;SIS900 Symbolic offsets to registers.
  305.     SIS900_cr           equ     0x0               ; Command Register
  306.     SIS900_cfg          equ     0x4       ; Configuration Register
  307.     SIS900_mear     equ     0x8       ; EEPROM Access Register
  308.     SIS900_ptscr    equ     0xc       ; PCI Test Control Register
  309.     SIS900_isr          equ     0x10      ; Interrupt Status Register
  310.     SIS900_imr          equ     0x14      ; Interrupt Mask Register
  311.     SIS900_ier          equ     0x18      ; Interrupt Enable Register
  312.     SIS900_epar         equ     0x18      ; Enhanced PHY Access Register
  313.     SIS900_txdp     equ     0x20      ; Transmit Descriptor Pointer Register
  314.     SIS900_txcfg    equ     0x24      ; Transmit Configuration Register
  315.     SIS900_rxdp     equ     0x30      ; Receive Descriptor Pointer Register
  316.     SIS900_rxcfg    equ     0x34      ; Receive Configuration Register
  317.     SIS900_flctrl   equ     0x38      ; Flow Control Register
  318.     SIS900_rxlen    equ     0x3c      ; Receive Packet Length Register
  319.     SIS900_rfcr     equ     0x48      ; Receive Filter Control Register
  320.     SIS900_rfdr     equ     0x4C      ; Receive Filter Data Register
  321.     SIS900_pmctrl   equ     0xB0      ; Power Management Control Register
  322.     SIS900_pmer         equ     0xB4      ; Power Management Wake-up Event Register
  323. ;SIS900 Command Register Bits
  324.     SIS900_RELOAD       equ      0x00000400
  325.     SIS900_ACCESSMODE   equ      0x00000200
  326.     SIS900_RESET        equ      0x00000100
  327.     SIS900_SWI          equ      0x00000080
  328.     SIS900_RxRESET      equ      0x00000020
  329.     SIS900_TxRESET      equ      0x00000010
  330.     SIS900_RxDIS        equ      0x00000008
  331.     SIS900_RxENA        equ      0x00000004
  332.     SIS900_TxDIS        equ      0x00000002
  333.     SIS900_TxENA        equ      0x00000001
  334. ;SIS900 Configuration Register Bits
  335.     SIS900_DESCRFMT      equ    0x00000100 ; 7016 specific
  336.     SIS900_REQALG        equ    0x00000080
  337.     SIS900_SB            equ    0x00000040
  338.     SIS900_POW           equ    0x00000020
  339.     SIS900_EXD           equ    0x00000010
  340.     SIS900_PESEL         equ    0x00000008
  341.     SIS900_LPM           equ    0x00000004
  342.     SIS900_BEM           equ    0x00000001
  343.     SIS900_RND_CNT       equ    0x00000400
  344.     SIS900_FAIR_BACKOFF  equ    0x00000200
  345.     SIS900_EDB_MASTER_EN equ    0x00002000
  346. ;SIS900 Eeprom Access Reigster Bits
  347.     SIS900_MDC        equ      0x00000040
  348.     SIS900_MDDIR      equ      0x00000020
  349.     SIS900_MDIO       equ      0x00000010  ; 7016 specific
  350.     SIS900_EECS       equ      0x00000008
  351.     SIS900_EECLK      equ      0x00000004
  352.     SIS900_EEDO       equ      0x00000002
  353.     SIS900_EEDI       equ      0x00000001
  354. ;SIS900 TX Configuration Register Bits
  355.     SIS900_ATP        equ      0x10000000 ;Automatic Transmit Padding
  356.     SIS900_MLB        equ      0x20000000 ;Mac Loopback Enable
  357.     SIS900_HBI        equ      0x40000000 ;HeartBeat Ignore (Req for full-dup)
  358.     SIS900_CSI        equ      0x80000000 ;CarrierSenseIgnore (Req for full-du
  359. ;SIS900 RX Configuration Register Bits
  360.     SIS900_AJAB       equ      0x08000000 ;
  361.     SIS900_ATX        equ      0x10000000 ;Accept Transmit Packets
  362.     SIS900_ARP        equ      0x40000000 ;accept runt packets (<64bytes)
  363.     SIS900_AEP        equ      0x80000000 ;accept error packets
  364. ;SIS900 Interrupt Reigster Bits
  365.     SIS900_WKEVT           equ      0x10000000
  366.     SIS900_TxPAUSEEND      equ      0x08000000
  367.     SIS900_TxPAUSE         equ      0x04000000
  368.     SIS900_TxRCMP          equ      0x02000000
  369.     SIS900_RxRCMP          equ      0x01000000
  370.     SIS900_DPERR           equ      0x00800000
  371.     SIS900_SSERR           equ      0x00400000
  372.     SIS900_RMABT           equ      0x00200000
  373.     SIS900_RTABT           equ      0x00100000
  374.     SIS900_RxSOVR          equ      0x00010000
  375.     SIS900_HIBERR          equ      0x00008000
  376.     SIS900_SWINT           equ      0x00001000
  377.     SIS900_MIBINT          equ      0x00000800
  378.     SIS900_TxURN           equ      0x00000400
  379.     SIS900_TxIDLE          equ      0x00000200
  380.     SIS900_TxERR           equ      0x00000100
  381.     SIS900_TxDESC          equ      0x00000080
  382.     SIS900_TxOK            equ      0x00000040
  383.     SIS900_RxORN           equ      0x00000020
  384.     SIS900_RxIDLE          equ      0x00000010
  385.     SIS900_RxEARLY         equ      0x00000008
  386.     SIS900_RxERR           equ      0x00000004
  387.     SIS900_RxDESC          equ      0x00000002
  388.     SIS900_RxOK            equ      0x00000001
  389. ;SIS900 Interrupt Enable Reigster Bits
  390.     SIS900_IE      equ      0x00000001
  391. ;SIS900 Revision ID
  392.         SIS900B_900_REV       equ      0x03
  393.         SIS630A_900_REV       equ      0x80
  394.         SIS630E_900_REV       equ      0x81
  395.         SIS630S_900_REV       equ      0x82
  396.         SIS630EA1_900_REV     equ      0x83
  397.         SIS630ET_900_REV      equ      0x84
  398.         SIS635A_900_REV       equ      0x90
  399.         SIS900_960_REV        equ      0x91
  400. ;SIS900 Receive Filter Control Register Bits
  401.     SIS900_RFEN          equ 0x80000000
  402.     SIS900_RFAAB         equ 0x40000000
  403.     SIS900_RFAAM         equ 0x20000000
  404.     SIS900_RFAAP         equ 0x10000000
  405.     SIS900_RFPromiscuous equ 0x70000000
  406. ;SIS900 Reveive Filter Data Mask
  407.     SIS900_RFDAT equ  0x0000FFFF
  408. ;SIS900 Eeprom Address
  409.     SIS900_EEPROMSignature equ 0x00
  410.     SIS900_EEPROMVendorID  equ 0x02
  411.     SIS900_EEPROMDeviceID  equ 0x03
  412.     SIS900_EEPROMMACAddr   equ 0x08
  413.     SIS900_EEPROMChecksum  equ 0x0b
  414. ;The EEPROM commands include the alway-set leading bit.
  415. ;SIS900 Eeprom Command
  416.     SIS900_EEread          equ 0x0180
  417.     SIS900_EEwrite         equ 0x0140
  418.     SIS900_EEerase         equ 0x01C0
  419.     SIS900_EEwriteEnable   equ 0x0130
  420.     SIS900_EEwriteDisable  equ 0x0100
  421.     SIS900_EEeraseAll      equ 0x0120
  422.     SIS900_EEwriteAll      equ 0x0110
  423.     SIS900_EEaddrMask      equ 0x013F
  424.     SIS900_EEcmdShift      equ 16
  425. ;For SiS962 or SiS963, request the eeprom software access
  426.         SIS900_EEREQ    equ 0x00000400
  427.         SIS900_EEDONE   equ 0x00000200
  428.         SIS900_EEGNT    equ 0x00000100
  429.  
  430. SIS900_pci_revision equ ebx+device.pci_revision
  431. sis900_get_mac_func equ ebx+device.get_MAC
  432. sis900_special_func equ ebx+device.special_func
  433. sis900_table_entries equ ebx+device.table_entries
  434. cur_rx equ ebx+device.cur_rx
  435. sys_msg_board_str equ SysMsgBoardStr
  436. ;***************************************************************************
  437. ;   Function
  438. ;      SIS900_probe
  439. ;   Description
  440. ;      Searches for an ethernet card, enables it and clears the rx buffer
  441. ;      If a card was found, it enables the ethernet -> TCPIP link
  442. ;not done  - still need to probe mii transcievers
  443. ;***************************************************************************
  444. if defined SIS900_DEBUG
  445. SIS900_Debug_Str_Unsupported db 'Sorry your card is unsupported ',13,10,0
  446. end if
  447. SIS900_probe:
  448. ;******Wake Up Chip*******
  449.    stdcall PciWrite8, dword [ebx+device.pci_bus], dword [ebx+device.pci_dev], 0x40, 0
  450. ;*******Set some PCI Settings*********
  451.    call    SIS900_adjust_pci_device
  452. ;*****Get Card Revision******
  453.    stdcall PciRead8, dword [ebx+device.pci_bus], dword [ebx+device.pci_dev], 0x08
  454.    mov [SIS900_pci_revision], al        ;save the revision for later use
  455. ;****** Look up through the sis900_specific_table
  456.    mov     esi,sis900_specific_table
  457. .probe_loop:
  458.    cmp     dword [esi],0                ; Check if we reached end of the list
  459.    je      .probe_loop_failed
  460.    cmp     al,[esi]                     ; Check if revision is OK
  461.    je      .probe_loop_ok
  462.    add     esi,12                       ; Advance to next entry
  463.    jmp     .probe_loop
  464. .probe_loop_failed:
  465.    jmp     SIS900_Probe_Unsupported
  466. ;*********Find Get Mac Function*********
  467. .probe_loop_ok:
  468.    mov      eax,[esi+4]         ; Get pointer to "get MAC" function
  469.    mov      [sis900_get_mac_func],eax
  470.    mov      eax,[esi+8]         ; Get pointer to special initialization fn
  471.    mov      [sis900_special_func],eax
  472. ;******** Get MAC ********
  473.    call     dword [sis900_get_mac_func]
  474. ;******** Call special initialization fn if requested ********
  475.    cmp      dword [sis900_special_func],0
  476.    je       .no_special_init
  477.    call     dword [sis900_special_func]
  478. .no_special_init:
  479. ;******** Set table entries ********
  480.    mov      al,[SIS900_pci_revision]
  481.    cmp      al,SIS635A_900_REV
  482.    jae      .ent16
  483.    cmp      al,SIS900B_900_REV
  484.    je       .ent16
  485.    mov      byte [sis900_table_entries],8
  486.    jmp      .ent8
  487. .ent16:
  488.    mov      byte [sis900_table_entries],16
  489. .ent8:
  490. ;*******Probe for mii transceiver*******
  491. ;TODO!!*********************
  492. ;*******Initialize Device*******
  493.    call sis900_init
  494.    ret
  495.  
  496. SIS900_Probe_Unsupported:
  497. if defined SIS900_DEBUG
  498.    mov     esi, SIS900_Debug_Str_Unsupported
  499.    call    sys_msg_board_str
  500. end if
  501.    or      eax, -1
  502.    ret
  503. ;***************************************************************************
  504. ; Function: sis900_init
  505. ;
  506. ; Description: resets the ethernet controller chip and various
  507. ;    data structures required for sending and receiving packets.
  508. ;
  509. ; Arguments:
  510. ;
  511. ; returns:   none
  512. ;not done
  513. ;***************************************************************************
  514. sis900_init:
  515.    call SIS900_reset               ;Done
  516.    call SIS900_init_rxfilter   ;Done
  517.    call SIS900_init_txd        ;Done
  518.    call SIS900_init_rxd            ;Done
  519.    call SIS900_set_rx_mode     ;done
  520.    call SIS900_set_tx_mode
  521.    ;call SIS900_check_mode
  522. ; enable interrupts on packet receive
  523.         xor     eax, eax
  524.         inc     eax     ; eax = 1 = SIS900_RxOK
  525.         mov     edx, [ebx+device.io_addr]
  526.         add     edx, SIS900_imr
  527.         out     dx, eax
  528. ; globally enable interrupts
  529.         add     edx, SIS900_ier-SIS900_imr
  530.         out     dx, eax ; eax is still 1
  531.         xor     eax, eax
  532.    ret
  533.  
  534. ;***************************************************************************
  535. ;   Function
  536. ;      SIS900_reset
  537. ;   Description
  538. ;      disables interrupts and soft resets the controller chip
  539. ;
  540. ;done+
  541. ;***************************************************************************
  542. if defined SIS900_DEBUG
  543.    SIS900_Debug_Reset_Failed db 'Reset Failed ',0
  544. end if
  545. SIS900_reset:
  546.         movzx   eax, [ebx+device.irq_line]
  547.         stdcall AttachIntHandler, eax, int_handler, 0
  548.    push     ebp
  549.    mov      ebp, [ebx+device.io_addr] ; base address
  550.    ;******Disable Interrupts and reset Receive Filter*******
  551.    xor      eax, eax            ; 0 to initialize
  552.    lea      edx,[ebp+SIS900_ier]
  553.    out      dx, eax                     ; Write 0 to location
  554.    lea      edx,[ebp+SIS900_imr]
  555.    out      dx, eax                     ; Write 0 to location
  556.    lea      edx,[ebp+SIS900_rfcr]
  557.    out      dx, eax                     ; Write 0 to location
  558.    ;*******Reset Card***********************************************
  559.    lea      edx,[ebp+SIS900_cr]
  560.    in       eax, dx                             ; Get current Command Register
  561.    or       eax, SIS900_RESET           ; set flags
  562.    or       eax, SIS900_RxRESET     ;
  563.    or           eax, SIS900_TxRESET         ;
  564.    out      dx, eax                             ; Write new Command Register
  565.    ;*******Wait Loop************************************************
  566.    push     ebx
  567.    lea      edx,[ebp+SIS900_isr]
  568.    mov      ecx, 0x03000000         ; Status we would like to see from card
  569.    mov      ebx, 2001               ; only loop 1000 times
  570. SIS900_Wait:
  571.    dec      ebx                                     ; 1 less loop
  572.    jz       SIS900_DoneWait_e           ; 1000 times yet?
  573.    in       eax, dx                                 ; move interrup status to eax
  574.    and      eax, ecx
  575.    xor      ecx, eax
  576.    jz       SIS900_DoneWait
  577.    jmp      SIS900_Wait
  578. SIS900_DoneWait_e:
  579. if defined SIS900_DEBUG
  580.    mov esi, SIS900_Debug_Reset_Failed
  581.    call sys_msg_board_str
  582. end if
  583. SIS900_DoneWait:
  584.    pop      ebx
  585.    ;*******Set Configuration Register depending on Card Revision********
  586.    lea      edx,[ebp+SIS900_cfg]
  587.    mov      eax, SIS900_PESEL               ; Configuration Register Bit
  588.    mov      cl, [SIS900_pci_revision]   ; card revision
  589.    cmp      cl, SIS635A_900_REV
  590.    je       SIS900_RevMatch
  591.    cmp      cl, SIS900B_900_REV         ; Check card revision
  592.    je       SIS900_RevMatch
  593.    out      dx, eax                                 ; no revision match
  594.    jmp      SIS900_Reset_Complete
  595. SIS900_RevMatch:                                        ; Revision match
  596.    or       eax, SIS900_RND_CNT         ; Configuration Register Bit
  597.    out      dx, eax
  598. SIS900_Reset_Complete:
  599.    xor      eax, eax
  600.    pop      ebp
  601.    ret
  602.  
  603. ;***************************************************************************
  604. ; Function: sis_init_rxfilter
  605. ;
  606. ; Description: sets receive filter address to our MAC address
  607. ;
  608. ; Arguments:
  609. ;
  610. ; returns:
  611. ;done+
  612. ;***************************************************************************
  613. SIS900_init_rxfilter:
  614.    push     ebp
  615.    mov      ebp, [ebx+device.io_addr]   ; base address
  616.    ;****Get Receive Filter Control Register ********
  617.    lea      edx,[ebp+SIS900_rfcr]
  618.    in       eax, dx                         ; get register
  619.    push     eax
  620.    ;****disable packet filtering before setting filter*******
  621.    mov      eax, SIS900_RFEN    ;move receive filter enable flag
  622.    not      eax                         ;1s complement
  623.    and      eax, [esp]                  ;disable receiver
  624.    out      dx, eax                     ;set receive disabled
  625.    ;********load MAC addr to filter data register*********
  626.    xor      ecx, ecx
  627. SIS900_RXINT_Mac_Write:
  628.    ;high word of eax tells card which mac byte to write
  629.    mov      eax, ecx
  630.    lea      edx,[ebp+SIS900_rfcr]
  631.    shl      eax, 16                                             ;
  632.    out      dx, eax                                             ;
  633.    lea      edx,[ebp+SIS900_rfdr]
  634.    mov      ax,  word [ebx+device.mac+ecx*2] ; Get Mac ID word
  635.    out      dx, ax                                              ; Send Mac ID
  636.    inc      cl                                                  ; send next word
  637.    cmp      cl, 3                                               ; more to send?
  638.    jne      SIS900_RXINT_Mac_Write
  639.    ;********enable packet filitering *****
  640.    pop      eax                             ;old register value
  641.    lea      edx,[ebp+SIS900_rfcr]
  642.    or       eax, SIS900_RFEN    ;enable filtering
  643.    out      dx, eax             ;set register
  644.    pop      ebp
  645.    ret
  646.  
  647. ;***************************************************************************
  648. ;*
  649. ;* Function: sis_init_txd
  650. ;*
  651. ;* Description: initializes the Tx descriptor
  652. ;*
  653. ;* Arguments:
  654. ;*
  655. ;* returns:
  656. ;*done
  657. ;***************************************************************************
  658. SIS900_init_txd:
  659.    ;********** initialize TX descriptor **************
  660.    mov     [ebx+device.txd], dword 0       ;put link to next descriptor in link field
  661.    mov     [ebx+device.txd+4],dword 0      ;clear status field
  662.    lea     eax, [ebx+0x1000]
  663.    call    GetPgAddr
  664.    mov     [ebx+device.txd+8], eax   ;save address to buffer ptr field
  665.    ;*************** load Transmit Descriptor Register ***************
  666.    mov     edx, [ebx+device.io_addr]        ; base address
  667.    add     edx, SIS900_txdp      ; TX Descriptor Pointer
  668.    add     eax, device.txd - 0x1000        ; First Descriptor
  669.    out     dx, eax                             ; move the pointer
  670.    ret
  671.  
  672. ;***************************************************************************
  673. ;* Function: sis_init_rxd
  674. ;*
  675. ;* Description: initializes the Rx descriptor ring
  676. ;*
  677. ;* Arguments:
  678. ;*
  679. ;* Returns:
  680. ;*done
  681. ;***************************************************************************
  682. SIS900_init_rxd:
  683.    xor      ecx,ecx
  684.    mov      [cur_rx], cl                                        ;Set cuurent rx discriptor to 0
  685.    mov      eax, ebx
  686.    call     GetPgAddr
  687.    mov      esi, eax
  688.    ;******** init RX descriptors ********
  689. SIS900_init_rxd_Loop:
  690.     mov     edx, ecx                                        ;current descriptor
  691.     imul    edx, 12                         ;
  692.     mov     eax, ecx                                        ;determine next link descriptor
  693.     inc     eax                             ;
  694.     cmp     eax, NUM_RX_DESC                ;
  695.     jne     SIS900_init_rxd_Loop_0          ;
  696.     xor     eax, eax                        ;
  697. SIS900_init_rxd_Loop_0:                    ;
  698.     imul    eax, 12                         ;
  699.     lea     eax, [eax+esi+device.rxd]
  700.     mov     [ebx+device.rxd+edx], eax                                      ;save link to next descriptor
  701.     mov     [ebx+device.rxd+edx+4],dword RX_BUFF_SZ        ;status bits init to buf size
  702.     mov     eax, ecx                                            ;find where the buf is located
  703.     imul    eax,RX_BUFF_SZ                  ;
  704.     lea     eax, [eax+esi+0x1000+NUM_TX_DESC*TX_BUFF_SZ]
  705.     mov     [ebx+device.rxd+edx+8], eax                            ;save buffer pointer
  706.     inc     ecx                                                     ;next descriptor
  707.     cmp     ecx, NUM_RX_DESC                ;
  708.     jne     SIS900_init_rxd_Loop            ;
  709.     ;********* load Receive Descriptor Register with address of first
  710.     ; descriptor*********
  711.     mov     edx, [ebx+device.io_addr]
  712.     add     edx, SIS900_rxdp
  713.     lea     eax, [esi+device.rxd]
  714.     out     dx, eax
  715.     ret
  716.  
  717. ;***************************************************************************
  718. ;* Function: sis900_set_tx_mode
  719. ;*
  720. ;* Description:
  721. ;*    sets the transmit mode to allow for full duplex
  722. ;*
  723. ;*
  724. ;* Arguments:
  725. ;*
  726. ;* Returns:
  727. ;*
  728. ;* Comments:
  729. ;*     If you are having problems transmitting packet try changing the
  730. ;*     Max DMA Burst, Possible settings are as follows:
  731. ;*         0x00000000 = 512 bytes
  732. ;*         0x00100000 = 4 bytes
  733. ;*         0x00200000 = 8 bytes
  734. ;*         0x00300000 = 16 bytes
  735. ;*         0x00400000 = 32 bytes
  736. ;*         0x00500000 = 64 bytes
  737. ;*         0x00600000 = 128 bytes
  738. ;*         0x00700000 = 256 bytes
  739. ;***************************************************************************
  740. SIS900_set_tx_mode:
  741.    push     ebp
  742.    mov      ebp,[ebx+device.io_addr]
  743.    lea      edx,[ebp+SIS900_cr]
  744.    in       eax, dx                         ; Get current Command Register
  745.    or       eax, SIS900_TxENA   ;Enable Receive
  746.    out      dx, eax
  747.    lea      edx,[ebp+SIS900_txcfg]; Transmit config Register offset
  748.    mov      eax, SIS900_ATP             ;allow automatic padding
  749.    or       eax, SIS900_HBI             ;allow heartbeat ignore
  750.    or       eax, SIS900_CSI             ;allow carrier sense ignore
  751.    or       eax, 0x00600000     ;Max DMA Burst
  752.    or       eax, 0x00000100     ;TX Fill Threshold
  753.    or       eax, 0x00000020     ;TX Drain Threshold
  754.    out      dx, eax
  755.    pop      ebp
  756.    ret
  757.  
  758. ;***************************************************************************
  759. ;* Function: sis900_set_rx_mode
  760. ;*
  761. ;* Description:
  762. ;*    sets the receive mode to accept all broadcast packets and packets
  763. ;*    with our MAC address, and reject all multicast packets.  Also allows
  764. ;*    full-duplex
  765. ;*
  766. ;* Arguments:
  767. ;*
  768. ;* Returns:
  769. ;*
  770. ;* Comments:
  771. ;*     If you are having problems receiving packet try changing the
  772. ;*     Max DMA Burst, Possible settings are as follows:
  773. ;*         0x00000000 = 512 bytes
  774. ;*         0x00100000 = 4 bytes
  775. ;*         0x00200000 = 8 bytes
  776. ;*         0x00300000 = 16 bytes
  777. ;*         0x00400000 = 32 bytes
  778. ;*         0x00500000 = 64 bytes
  779. ;*         0x00600000 = 128 bytes
  780. ;*         0x00700000 = 256 bytes
  781. ;***************************************************************************
  782. SIS900_set_rx_mode:
  783.    push     ebp
  784.    mov      ebp,[ebx+device.io_addr]
  785.     ;**************update Multicast Hash Table in Receive Filter
  786.    xor      cl, cl
  787. SIS900_set_rx_mode_Loop:
  788.    mov      eax, ecx
  789.    shl      eax, 1
  790.    lea      edx,[ebp+SIS900_rfcr]           ; Receive Filter Control Reg offset
  791.    mov      eax, 4                                          ;determine table entry
  792.    add      al, cl
  793.    shl      eax, 16
  794.    out      dx, eax                                         ;tell card which entry to modify
  795.    lea      edx,[ebp+SIS900_rfdr]           ; Receive Filter Control Reg offset
  796.    mov      eax, 0xffff                             ;entry value
  797.    out      dx, ax                                          ;write value to table in card
  798.    inc      cl                                              ;next entry
  799.    cmp      cl,[sis900_table_entries]   ;
  800.    jl       SIS900_set_rx_mode_Loop
  801.    ;*******Set Receive Filter Control Register*************
  802.    lea      edx,[ebp+SIS900_rfcr]       ; Receive Filter Control Register offset
  803.    mov      eax, SIS900_RFAAB           ;accecpt all broadcast packets
  804.    or       eax, SIS900_RFAAM           ;accept all multicast packets
  805.    or       eax, SIS900_RFAAP           ;Accept all packets
  806.    or       eax, SIS900_RFEN            ;enable receiver filter
  807.    out      dx, eax
  808.    ;******Enable Receiver************
  809.    lea      edx,[ebp+SIS900_cr] ; Command Register offset
  810.    in       eax, dx                         ; Get current Command Register
  811.    or       eax, SIS900_RxENA   ;Enable Receive
  812.    out      dx, eax
  813.    ;*********Set
  814.    lea      edx,[ebp+SIS900_rxcfg]      ; Receive Config Register offset
  815.    mov      eax, SIS900_ATX                     ;Accept Transmit Packets
  816.                                     ; (Req for full-duplex and PMD Loopback)
  817.    or       eax, 0x00600000                     ;Max DMA Burst
  818.    or       eax, 0x00000002                     ;RX Drain Threshold, 8X8 bytes or 64bytes
  819.    out      dx, eax                                     ;
  820.    pop      ebp
  821.    ret
  822.  
  823. ;***************************************************************************
  824. ; *     SIS960_get_mac_addr: - Get MAC address for SiS962 or SiS963 model
  825. ; *     @pci_dev: the sis900 pci device
  826. ; *     @net_dev: the net device to get address for
  827. ; *
  828. ; *     SiS962 or SiS963 model, use EEPROM to store MAC address. And EEPROM
  829. ; *     is shared by
  830. ; *     LAN and 1394. When access EEPROM, send EEREQ signal to hardware first
  831. ; *     and wait for EEGNT. If EEGNT is ON, EEPROM is permitted to be access
  832. ; *     by LAN, otherwise is not. After MAC address is read from EEPROM, send
  833. ; *     EEDONE signal to refuse EEPROM access by LAN.
  834. ; *     The EEPROM map of SiS962 or SiS963 is different to SiS900.
  835. ; *     The signature field in SiS962 or SiS963 spec is meaningless.
  836. ; *     MAC address is read into @net_dev->dev_addr.
  837. ; *done
  838. ;*
  839. ;* Return 0 is EAX = failure
  840. ;*Done+
  841. ;***************************************************************************
  842. if defined SIS900_DEBUG
  843. SIS900_Debug_Str_GetMac_Start db 'Attempting to get SIS900 Mac ID: ',13,10,0
  844. SIS900_Debug_Str_GetMac_Failed db 'Access to EEprom Failed',13,10,0
  845. SIS900_Debug_Str_GetMac_Address db 'Your Mac ID is: ',0
  846. SIS900_Debug_Str_GetMac_Address2 db 'Your SIS96x Mac ID is: ',0
  847. end if
  848. SIS960_get_mac_addr:
  849.    push     ebp
  850.    mov      ebp,[ebx+device.io_addr]
  851.    ;**********Send Request for eeprom access*********************
  852.    lea      edx,[ebp+SIS900_mear]               ; Eeprom access register
  853.    mov      eax, SIS900_EEREQ                   ; Request access to eeprom
  854.    out      dx, eax                                             ; Send request
  855.    xor      ecx,ecx                                             ;
  856.    ;******Loop 4000 times and if access not granted error out*****
  857. SIS96X_Get_Mac_Wait:
  858.    in       eax, dx                                     ;get eeprom status
  859.    and      eax, SIS900_EEGNT       ;see if eeprom access granted flag is set
  860.    jnz      SIS900_Got_EEP_Access       ;if it is, go access the eeprom
  861.    inc      ecx                                         ;else keep waiting
  862.    cmp      ecx, 4000                           ;have we tried 4000 times yet?
  863.    jl       SIS96X_Get_Mac_Wait     ;if not ask again
  864.    xor      eax, eax                ;return zero in eax indicating failure
  865.    ;*******Debug **********************
  866. if defined SIS900_DEBUG
  867.    mov esi,SIS900_Debug_Str_GetMac_Failed
  868.    call sys_msg_board_str
  869. end if
  870.    jmp SIS960_get_mac_addr_done
  871.    ;**********EEprom access granted, read MAC from card*************
  872. SIS900_Got_EEP_Access:
  873.     ; zero based so 3-16 bit reads will take place
  874.    mov      ecx, 2
  875. SIS96x_mac_read_loop:
  876.    mov      eax, SIS900_EEPROMMACAddr    ;Base Mac Address
  877.    add      eax, ecx                                 ;Current Mac Byte Offset
  878.    push     ecx
  879.    call     sis900_read_eeprom           ;try to read 16 bits
  880.    pop      ecx
  881.    mov      word [ebx+device.mac+ecx*2], ax        ;save 16 bits to the MAC ID varible
  882.    dec      ecx                          ;one less word to read
  883.    jns      SIS96x_mac_read_loop         ;if more read more
  884.    mov      eax, 1                       ;return non-zero indicating success
  885.    ;*******Debug Print MAC ID to debug window**********************
  886. if defined SIS900_DEBUG
  887.    mov esi,SIS900_Debug_Str_GetMac_Address2
  888.    call sys_msg_board_str
  889.    lea edx, [ebx+device.mac]
  890.    call Create_Mac_String
  891. end if
  892.    ;**********Tell EEPROM We are Done Accessing It*********************
  893. SIS960_get_mac_addr_done:
  894.    lea      edx,[ebp+SIS900_mear]               ; Eeprom access register
  895.    mov      eax, SIS900_EEDONE           ;tell eeprom we are done
  896.    out      dx,eax
  897.    pop      ebp
  898.    ret
  899. ;***************************************************************************
  900. ;*      sis900_get_mac_addr: - Get MAC address for stand alone SiS900 model
  901. ;*      @pci_dev: the sis900 pci device
  902. ;*      @net_dev: the net device to get address for
  903. ;*
  904. ;*      Older SiS900 and friends, use EEPROM to store MAC address.
  905. ;*      MAC address is read from read_eeprom() into @net_dev->dev_addr.
  906. ;* done/untested
  907. ;***************************************************************************
  908. SIS900_get_mac_addr:
  909.    ;*******Debug **********************
  910. if defined SIS900_DEBUG
  911.    mov esi,SIS900_Debug_Str_GetMac_Start
  912.    call sys_msg_board_str
  913. end if
  914.    ;******** check to see if we have sane EEPROM *******
  915.    mov      eax, SIS900_EEPROMSignature  ;Base Eeprom Signature
  916.    call     sis900_read_eeprom           ;try to read 16 bits
  917.    cmp ax, 0xffff
  918.    je SIS900_Bad_Eeprom
  919.    cmp ax, 0
  920.    je SIS900_Bad_Eeprom
  921.    ;**************Read MacID**************
  922.    ; zero based so 3-16 bit reads will take place
  923.    mov      ecx, 2
  924. SIS900_mac_read_loop:
  925.    mov      eax, SIS900_EEPROMMACAddr    ;Base Mac Address
  926.    add      eax, ecx                                 ;Current Mac Byte Offset
  927.    push     ecx
  928.    call     sis900_read_eeprom           ;try to read 16 bits
  929.    pop      ecx
  930.    mov      word [ebx+device.mac+ecx*2], ax        ;save 16 bits to the MAC ID storage
  931.    dec      ecx                          ;one less word to read
  932.    jns      SIS900_mac_read_loop         ;if more read more
  933.    mov      eax, 1                       ;return non-zero indicating success
  934.    ;*******Debug Print MAC ID to debug window**********************
  935. if defined SIS900_DEBUG
  936.    mov esi,SIS900_Debug_Str_GetMac_Address
  937.    call sys_msg_board_str
  938.    lea edx, [ebx+device.mac]
  939.    call Create_Mac_String
  940. end if
  941.    ret
  942.  
  943. SIS900_Bad_Eeprom:
  944.    xor eax, eax
  945.    ;*******Debug **********************
  946. if defined SIS900_DEBUG
  947.    mov esi,SIS900_Debug_Str_GetMac_Failed
  948.    call sys_msg_board_str
  949. end if
  950.    ret
  951. ;***************************************************************************
  952. ;*      Get_Mac_SIS635_900_REV: - Get MAC address for model 635
  953. ;*
  954. ;*
  955. ;***************************************************************************
  956. Get_Mac_SIS635_900_REV:
  957. if defined SIS900_DEBUG
  958.     mov     esi,SIS900_Debug_Str_GetMac_Start
  959.     call    sys_msg_board_str
  960. end if
  961.     push    ebp
  962.     mov     ebp,[ebx+device.io_addr]
  963.     lea     edx,[ebp+SIS900_rfcr]
  964.     in      eax,dx
  965.     mov     edi,eax ; EDI=rfcrSave
  966.     lea     edx,[ebp+SIS900_cr]
  967.     or      eax,SIS900_RELOAD
  968.     out     dx,eax
  969.     xor     eax,eax
  970.     out     dx,eax
  971.     ; Disable packet filtering before setting filter
  972.     lea     edx,[ebp+SIS900_rfcr]
  973.     mov     eax,edi
  974.     and     edi,not SIS900_RFEN
  975.     out     dx,eax
  976.     ; Load MAC to filter data register
  977.     xor     ecx,ecx
  978.     lea     esi,[ebx+device.mac]
  979. .get_mac_loop:
  980.     lea     edx,[ebp+SIS900_rfcr]
  981.     mov     eax,ecx
  982.     shl     eax,SIS900_RFADDR_shift
  983.     out     dx,eax
  984.     lea     edx,[ebp+SIS900_rfdr]
  985.     in      eax,dx
  986.     mov     [esi],ax
  987.     add     esi,2
  988.     inc     ecx
  989.     cmp     ecx,3
  990.     jne .get_mac_loop
  991.     ; Enable packet filtering
  992.     ;lea     edx,[ebp+SIS900_rfcr]
  993.     ;mov     eax,edi
  994.     ;or      eax,SIS900_RFEN
  995.     ;out     dx, eax
  996.    ;*******Debug Print MAC ID to debug window**********************
  997. if defined SIS900_DEBUG
  998.     mov     esi,SIS900_Debug_Str_GetMac_Address
  999.     call    sys_msg_board_str
  1000.     lea     edx, [ebx+device.mac]
  1001.     call    Create_Mac_String
  1002. end if
  1003.     pop     ebp
  1004.     ret
  1005. ;***************************************************************************
  1006. ;* Function: sis900_read_eeprom
  1007. ;*
  1008. ;* Description: reads and returns a given location from EEPROM
  1009. ;*
  1010. ;* Arguments: eax - location:       requested EEPROM location
  1011. ;*
  1012. ;* Returns:   eax :                contents of requested EEPROM location
  1013. ;*
  1014. ; Read Serial EEPROM through EEPROM Access Register, Note that location is
  1015. ;   in word (16 bits) unit */
  1016. ;done+
  1017. ;***************************************************************************
  1018. sis900_read_eeprom:
  1019.    push      esi
  1020.    push      edx
  1021.    push      ecx
  1022.    push      ebx
  1023.    push      ebp
  1024.    mov       ebp,[ebx+device.io_addr]
  1025.    mov       ebx, eax              ;location of Mac byte to read
  1026.    or        ebx, SIS900_EEread    ;
  1027.    lea       edx,[ebp+SIS900_mear] ; Eeprom access register
  1028.    xor       eax, eax              ; start send
  1029.    out       dx,eax
  1030.    call      SIS900_Eeprom_Delay_1
  1031.    mov       eax, SIS900_EECLK
  1032.    out       dx, eax
  1033.    call      SIS900_Eeprom_Delay_1
  1034.     ;************ Shift the read command (9) bits out. *********
  1035.    mov       cl, 8                                      ;
  1036. sis900_read_eeprom_Send:
  1037.    mov       eax, 1
  1038.    shl       eax, cl
  1039.    and       eax, ebx
  1040.    jz SIS900_Read_Eeprom_8
  1041.    mov       eax, 9
  1042.    jmp       SIS900_Read_Eeprom_9
  1043. SIS900_Read_Eeprom_8:
  1044.    mov       eax, 8
  1045. SIS900_Read_Eeprom_9:
  1046.    out       dx, eax
  1047.    call      SIS900_Eeprom_Delay_1
  1048.    or        eax, SIS900_EECLK
  1049.    out       dx, eax
  1050.    call      SIS900_Eeprom_Delay_1
  1051.    cmp       cl, 0
  1052.    je        sis900_read_eeprom_Send_Done
  1053.    dec       cl
  1054.    jmp       sis900_read_eeprom_Send
  1055.    ;*********************
  1056. sis900_read_eeprom_Send_Done:
  1057.    mov       eax, SIS900_EECS           ;
  1058.    out       dx, eax
  1059.    call      SIS900_Eeprom_Delay_1
  1060.     ;********** Read 16-bits of data in ***************
  1061.     mov      cx, 16                             ;16 bits to read
  1062. sis900_read_eeprom_Send2:
  1063.     mov      eax, SIS900_EECS
  1064.     out      dx, eax
  1065.     call     SIS900_Eeprom_Delay_1
  1066.     or       eax, SIS900_EECLK
  1067.     out      dx, eax
  1068.     call     SIS900_Eeprom_Delay_1
  1069.     in       eax, dx
  1070.     shl      ebx, 1
  1071.     and      eax, SIS900_EEDO
  1072.     jz       SIS900_Read_Eeprom_0
  1073.     or       ebx, 1
  1074. SIS900_Read_Eeprom_0:
  1075.    dec       cx
  1076.    jnz       sis900_read_eeprom_Send2
  1077.    ;************** Terminate the EEPROM access. **************
  1078.    xor       eax, eax
  1079.    out       dx, eax
  1080.    call      SIS900_Eeprom_Delay_1
  1081.    mov       eax, SIS900_EECLK
  1082.    out       dx, eax
  1083.    mov       eax, ebx
  1084.    and       eax, 0x0000ffff                    ;return only 16 bits
  1085.    pop       ebp
  1086.    pop       ebx
  1087.    pop       ecx
  1088.    pop       edx
  1089.    pop       esi
  1090.    ret
  1091. ;***************************************************************************
  1092. ;   Function
  1093. ;      SIS900_Eeprom_Delay_1
  1094. ;   Description
  1095. ;
  1096. ;
  1097. ;
  1098. ;
  1099. ;***************************************************************************
  1100. SIS900_Eeprom_Delay_1:
  1101.    push eax
  1102.    in eax, dx
  1103.    pop eax
  1104.    ret
  1105.  
  1106. write_mac:
  1107.         DEBUGF 1,'Setting MAC is not supported for SIS900 card.\n'
  1108.         add     esp, 6
  1109.         ret
  1110.  
  1111. ;***************************************************************************
  1112. ;   Function
  1113. ;      int_handler
  1114. ;   Description
  1115. ;      handles received IRQs, which signal received packets
  1116. ;
  1117. ;  Currently only supports one descriptor per packet, if packet is fragmented
  1118. ;  between multiple descriptors you will lose part of the packet
  1119. ;***************************************************************************
  1120. if defined SIS900_DEBUG
  1121. SIS900_Debug_Pull_Packet_good db 'Good Packet Waiting: ',13,10,0
  1122. SIS900_Debug_Pull_Bad_Packet_Status db 'Bad Packet Waiting: Status',13,10,0
  1123. SIS900_Debug_Pull_Bad_Packet_Size db 'Bad Packet Waiting: Size',13,10,0
  1124. end if
  1125. int_handler:
  1126. ; find pointer of device which made IRQ occur
  1127.         mov     esi, DEV_LIST
  1128.         mov     ecx, [NUM_DEV]
  1129.         test    ecx, ecx
  1130.         jz      .nothing
  1131. .nextdevice:
  1132.         mov     ebx, [esi]
  1133.         mov     edx, [ebx+device.io_addr]
  1134.         add     edx, SIS900_isr
  1135.         in      eax, dx ; note that this clears all interrupts
  1136.         test    al, SIS900_RxOK
  1137.         jnz     .got_it
  1138.         loop    .nextdevice
  1139. .nothing:
  1140.         ret
  1141. .got_it:
  1142.     ;**************Get Status **************
  1143.     movzx     eax, [ebx+device.cur_rx]          ;find current discriptor
  1144.     imul      eax, 12               ;
  1145.     mov       ecx, [ebx+device.rxd+eax+4]          ; get receive status
  1146.     ;**************Check Status **************
  1147.     ;Check RX_Status to see if packet is waiting
  1148.     test      ecx, 0x80000000
  1149.     jnz       SIS900_poll_IS_packet
  1150.     ret
  1151.    ;**********There is a packet waiting check it for errors**************
  1152. SIS900_poll_IS_packet:
  1153.     test      ecx, 0x67C0000            ;see if there are any errors
  1154.     jnz       SIS900_Poll_Error_Status
  1155.    ;**************Check size of packet*************
  1156.    and       ecx, SIS900_DSIZE                                  ;get packet size minus CRC
  1157.    cmp       ecx, SIS900_CRC_SIZE
  1158.    ;make sure packet contains data
  1159.    jle       SIS900_Poll_Error_Size
  1160.    ;*******Copy Good Packet to receive buffer******
  1161.    sub      ecx, SIS900_CRC_SIZE                             ;dont want crc
  1162.    ; update statistics
  1163.    inc      dword [ebx+device.packets_rx]
  1164.    add      dword [ebx+device.bytes_rx], ecx
  1165.    adc      dword [ebx+device.bytes_rx+4], 0
  1166.    push     ecx
  1167.    stdcall  KernelAlloc, ecx
  1168.    pop      ecx
  1169.    test     eax, eax
  1170.    jz       int_handler.nothing
  1171.    push     ebx
  1172.    push     .return ; return address for EthReceiver
  1173.    ;**********Continue copying packet****************
  1174.    push     ecx eax ; save buffer pointer and size for EthReceiver
  1175.    mov      edi, eax
  1176.    movzx    esi, byte [ebx+device.cur_rx]
  1177.    imul     esi, RX_BUFF_SZ
  1178.    lea      esi, [esi+ebx+0x1000+NUM_TX_DESC*TX_BUFF_SZ]
  1179.    ; first copy dword-wise, divide size by 4
  1180.    shr      ecx, 2
  1181.    rep      movsd                                                       ; copy the dwords
  1182.    mov      ecx, [esp+4]
  1183.    and      ecx, 3                                                  ;
  1184.    rep      movsb
  1185.    ;********Debug, tell user we have a good packet*************
  1186. if defined SIS900_DEBUG
  1187.    mov      esi, SIS900_Debug_Pull_Packet_good
  1188.    call     sys_msg_board_str
  1189. end if
  1190.    jmp      EthReceiver
  1191. .return:
  1192.    pop      ebx
  1193.    jmp      SIS900_Poll_Cnt
  1194.    ;*************Error occured let user know through debug window***********
  1195. SIS900_Poll_Error_Status:
  1196. if defined SIS900_DEBUG
  1197.                 mov      esi, SIS900_Debug_Pull_Bad_Packet_Status
  1198.                 call     sys_msg_board_str
  1199. end if
  1200.                 jmp      SIS900_Poll_Cnt
  1201. SIS900_Poll_Error_Size:
  1202. if defined SIS900_DEBUG
  1203.                 mov      esi, SIS900_Debug_Pull_Bad_Packet_Size
  1204.                 call     sys_msg_board_str
  1205. end if
  1206.    ;*************Increment to next available descriptor**************
  1207. SIS900_Poll_Cnt:
  1208.     ;Reset status, allow ethernet card access to descriptor
  1209.    movzx    eax, [ebx+device.cur_rx]
  1210.    lea      eax, [eax*3]
  1211.    mov      ecx, RX_BUFF_SZ
  1212.    mov      [ebx+device.rxd+eax*4+4], ecx                ;
  1213.    inc      [ebx+device.cur_rx]                          ;get next descriptor
  1214.    and      [ebx+device.cur_rx],NUM_RX_DESC-1            ;only 4 descriptors 0-3
  1215.    ;******Enable Receiver************
  1216.    mov      edx, [ebx+device.io_addr]
  1217.    add      edx, SIS900_cr ; Command Register offset
  1218.    in       eax, dx                         ; Get current Command Register
  1219.    or       eax, SIS900_RxENA   ;Enable Receive
  1220.    out      dx, eax
  1221.    ret
  1222. ;***************************************************************************
  1223. ;   Function
  1224. ;      transmit
  1225. ;   Description
  1226. ;      Transmits a packet of data via the ethernet card
  1227. ;         buffer pointer in [esp+4]
  1228. ;         size of buffer in [esp+8]
  1229. ;         pointer to device structure in ebx
  1230. ;
  1231. ;      only one transmit descriptor is used
  1232. ;
  1233. ;***************************************************************************
  1234. if defined SIS900_DEBUG
  1235. SIS900_Debug_Transmit_Packet db 'Transmitting Packet: ',13,10,0
  1236. SIS900_Debug_Transmit_Packet_Err db 'Transmitting Packet Error: ',13,10,0
  1237. end if
  1238. str1 db 'Transmitting packet:',13,10,0
  1239. str2 db ' ',0
  1240. transmit:
  1241.    cmp      dword [esp+8], MAX_ETH_FRAME_SIZE
  1242.    jg       transmit_finish
  1243.    cmp      dword [esp+8], 60
  1244.    jl       transmit_finish
  1245.    push     ebp
  1246.    mov      ebp, [ebx+device.io_addr] ; Base Address
  1247.    ;******** Stop the transmitter ********
  1248.    lea      edx,[ebp+SIS900_cr] ; Command Register offset
  1249.    in       eax, dx                         ; Get current Command Register
  1250.    or       eax, SIS900_TxDIS   ; Disable Transmitter
  1251.    out      dx, eax
  1252.    ;*******load Transmit Descriptor Register *******
  1253.    lea      edx,[ebp+SIS900_txdp]
  1254.    mov      eax, ebx
  1255.    call     GetPgAddr
  1256.    add      eax, device.txd
  1257.    out      dx, eax
  1258.    ;******* copy packet to descriptor*******
  1259.    mov     esi, [esp+8]
  1260.    lea     edi, [ebx+0x1000]
  1261.    mov     ecx, [esp+12]
  1262.    mov     edx, ecx
  1263.    shr     ecx, 2
  1264.    and     edx, 3
  1265.    rep     movsd
  1266.    mov     ecx, edx
  1267.    rep     movsb
  1268.    ;**************set length tag**************
  1269.    mov     ecx, [esp+12]                  ;restore packet size
  1270.    and     ecx, SIS900_DSIZE     ;
  1271.    inc      [ebx+device.packets_tx]
  1272.    add      dword [ebx+device.bytes_tx], ecx
  1273.    adc      dword [ebx+device.bytes_tx+4], 0
  1274.    ;**************pad to minimum packet size **************not needed
  1275.    ;cmp       ecx, SIS900_ETH_ZLEN
  1276.    ;jge       SIS900_transmit_Size_Ok
  1277.    ;push      ecx
  1278.    ;mov       ebx, SIS900_ETH_ZLEN
  1279.    ;sub       ebx, ecx
  1280.    ;mov       ecx, ebx
  1281.    ;rep       movsb
  1282.    ;pop       ecx
  1283. SIS900_transmit_Size_Ok:
  1284.    or       ecx, 0x80000000                             ;card owns descriptor
  1285.    mov      [ebx+device.txd+4], ecx
  1286. if defined SIS900_DEBUG
  1287.    mov      esi, SIS900_Debug_Transmit_Packet
  1288.    call     sys_msg_board_str
  1289. end if
  1290.    ;***************restart the transmitter ********
  1291.    lea      edx,[ebp+SIS900_cr]
  1292.    in       eax, dx                         ; Get current Command Register
  1293.    or       eax, SIS900_TxENA   ; Enable Transmitter
  1294.    out      dx, eax
  1295.    ;****make sure packet transmitted successfully****
  1296. ;   mov      esi,10
  1297. ;   call     delay_ms
  1298.    mov      eax, [ebx+device.txd+4]
  1299.    and      eax, 0x6200000
  1300.    jz       SIS900_transmit_OK
  1301.    ;**************Tell user there was an error through debug window
  1302. if defined SIS900_DEBUG
  1303.    mov      esi, SIS900_Debug_Transmit_Packet_Err
  1304.    call     sys_msg_board_str
  1305. end if
  1306. SIS900_transmit_OK:
  1307.    pop      ebp
  1308. transmit_finish:
  1309.    ret
  1310.  
  1311. ;***************************************************************************
  1312. ;* Function: Create_Mac_String
  1313. ;*
  1314. ;* Description: Converts the 48 bit value to a string for display
  1315. ;*
  1316. ;* String Format: XX:XX:XX:XX:XX:XX
  1317. ;*
  1318. ;* Arguments: node_addr is location of 48 bit MAC ID
  1319. ;*
  1320. ;* Returns:   Prints string to general debug window
  1321. ;*
  1322. ;*
  1323. ;done
  1324. ;***************************************************************************
  1325. if defined SIS900_DEBUG
  1326.  
  1327. SIS900_Char_String    db '0','1','2','3','4','5','6','7','8','9'
  1328.                       db 'A','B','C','D','E','F'
  1329. Mac_str_build: times 20 db 0
  1330. Create_Mac_String:
  1331.    pusha
  1332.    xor ecx, ecx
  1333. Create_Mac_String_loop:
  1334.    mov al,byte [edx+ecx];[node_addr+ecx]
  1335.    push eax
  1336.    shr eax, 4
  1337.    and eax, 0x0f
  1338.    mov bl, byte [SIS900_Char_String+eax]
  1339.    mov [Mac_str_build+ecx*3], bl
  1340.    pop eax
  1341.    and eax, 0x0f
  1342.    mov bl, byte [SIS900_Char_String+eax]
  1343.    mov [Mac_str_build+1+ecx*3], bl
  1344.    cmp ecx, 5
  1345.    je Create_Mac_String_done
  1346.    mov bl, ':'
  1347.    mov [Mac_str_build+2+ecx*3], bl
  1348.    inc ecx
  1349.    jmp Create_Mac_String_loop
  1350. Create_Mac_String_done:                                 ;Insert CR and Zero Terminate
  1351.    mov [Mac_str_build+2+ecx*3],byte 13
  1352.    mov [Mac_str_build+3+ecx*3],byte 10
  1353.    mov [Mac_str_build+4+ecx*3],byte 0
  1354.    mov esi, Mac_str_build
  1355.    call sys_msg_board_str                               ;Print String to message board
  1356.    popa
  1357.    ret
  1358. end if
  1359. ;***************************************************************************
  1360. ;*      Set device to be a busmaster in case BIOS neglected to do so.
  1361. ;*      Also adjust PCI latency timer to a reasonable value, 64.
  1362. ;***************************************************************************
  1363. SIS900_adjust_pci_device:
  1364.    ;*******Get current setting************************
  1365.    stdcall PciRead16, dword [ebx+device.pci_bus], dword [ebx+device.pci_dev], 0x04
  1366.    ;******see if its already set as bus master********
  1367.    mov      cx, ax
  1368.    and      cx,5
  1369.    cmp      cx,5
  1370.    je       SIS900_adjust_pci_device_Latency
  1371.    ;******Make card a bus master*******
  1372.    mov      cx, ax                              ;value to write
  1373.    or       cx,5
  1374.    stdcall PciWrite16, dword [ebx+device.pci_bus], dword [ebx+device.pci_dev], 0x04, ecx
  1375.    ;******Check latency setting***********
  1376. SIS900_adjust_pci_device_Latency:
  1377.    ;*******Get current latency setting************************
  1378.    stdcall PciRead8, dword [ebx+device.pci_bus], dword [ebx+device.pci_dev], 0x0D
  1379.    ;******see if its aat least 64 clocks********
  1380.    cmp      al,64
  1381.    jge      SIS900_adjust_pci_device_Done
  1382.    ;******Set latency to 32 clocks*******
  1383.    stdcall PciWrite8, dword [ebx+device.pci_bus], dword [ebx+device.pci_dev], 0x0D, 64
  1384.    ;******Check latency setting***********
  1385. SIS900_adjust_pci_device_Done:
  1386.    ret
  1387.  
  1388. ; End of code
  1389.  
  1390. align 4                                         ; Place all initialised data here
  1391.  
  1392. NUM_DEV   dd 0
  1393.  
  1394. sis900_specific_table:
  1395. ;    dd SIS630A_900_REV,Get_Mac_SIS630A_900_REV,0
  1396. ;    dd SIS630E_900_REV,Get_Mac_SIS630E_900_REV,0
  1397.     dd SIS630S_900_REV,Get_Mac_SIS635_900_REV,0
  1398.     dd SIS630EA1_900_REV,Get_Mac_SIS635_900_REV,0
  1399.     dd SIS630ET_900_REV,Get_Mac_SIS635_900_REV,0;SIS630ET_900_REV_SpecialFN
  1400.     dd SIS635A_900_REV,Get_Mac_SIS635_900_REV,0
  1401.     dd SIS900_960_REV,SIS960_get_mac_addr,0
  1402.     dd SIS900B_900_REV,SIS900_get_mac_addr,0
  1403.     dd 0,0,0,0 ; end of list
  1404.  
  1405. version       dd (5 shl 16) or (API_VERSION and 0xFFFF)
  1406. my_service    db 'SIS900',0                     ; max 16 chars include zero
  1407.  
  1408. include_debug_strings                           ; All data wich FDO uses will be included here
  1409.  
  1410. section '.data' data readable writable align 16 ; place all uninitialized data place here
  1411.  
  1412. DEV_LIST rd MAX_DEVICES                 ; This list contains all pointers to device structures the driver is handling
  1413.  
  1414.