kolibrios/kernel/branches/net/drivers/pcnet32.asm

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;                                                                  ;;
;; Copyright (C) KolibriOS team 2004-2010. All rights reserved.     ;;
;; Distributed under terms of the GNU General Public License        ;;
;;                                                                  ;;
;;  PCnet driver for KolibriOS                                      ;;
;;                                                                  ;;
;;  By hidnplayr & clevermouse                                      ;;
;;                                                                  ;;
;;  Based on the PCnet32 driver for MenuetOS, by Jarek Pelczar      ;;
;;                                                                  ;;
;;          GNU GENERAL PUBLIC LICENSE                              ;;
;;             Version 2, June 1991                                 ;;
;;                                                                  ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

; $Revision$

format MS COFF

        API_VERSION             =   0x01000100

        DEBUG                   =   1
        __DEBUG__               =   1
        __DEBUG_LEVEL__         =   1

        MAX_DEVICES =   4
        MAX_ETH_FRAME_SIZE =   1514

include 'proc32.inc'
include 'imports.inc'
include 'fdo.inc'
include 'netdrv.inc'


public START
public service_proc
public version


virtual at ebx

        device:

        ETH_DEVICE

; device specific

      .private:
      .mode_            dw ?
      .tlen_rlen        dw ?
      .phys_addr        dp ?
      .reserved         dw ?
      .filter           dq ?
      .rx_ring_phys     dd ?
      .tx_ring_phys     dd ?

      .cur_rx           db ?
      .cur_tx           db ?
      .dirty_rx         dd ?
      .dirty_tx         dd ?
      .tx_full          db ?
      .options          dd ?
      .full_duplex      db ?
      .chip_version     dd ?
      .mii              db ?
      .ltint            db ?
      .dxsuflo          db ?
      .fset             db ?
      .fdx              db ?

      .rx_buffer        dd ?
      .tx_buffer        dd ?

      .io_addr          dd ?
      .irq_line         db ?
      .pci_bus          db ?
      .pci_dev          db ?


      .access_read_csr          dd ?
      .access_write_csr         dd ?
      .access_read_bcr          dd ?
      .access_write_bcr         dd ?
      .access_read_rap          dd ?
      .access_write_rap         dd ?
      .access_reset             dd ?

      device_size       = $ - device

end virtual

struc buf_head {
        .base           dd ?
        .length         dw ?
        .status         dw ?
        .msg_length     dw ?
        .misc           dw ?
        .reserved       dd ?

        .size:
}

virtual at 0
 buf_head buf_head
end virtual

        PCNET_PORT_AUI                =   0x00
        PCNET_PORT_10BT               =   0x01
        PCNET_PORT_GPSI               =   0x02
        PCNET_PORT_MII                =   0x03
        PCNET_PORT_PORTSEL            =   0x03
        PCNET_PORT_ASEL               =   0x04
        PCNET_PORT_100                =   0x40
        PCNET_PORT_FD                 =   0x80

        PCNET_DMA_MASK                =   0xffffffff

        PCNET_LOG_TX_BUFFERS          =   2
        PCNET_LOG_RX_BUFFERS          =   2

        PCNET_TX_RING_SIZE            =   4
        PCNET_TX_RING_MOD_MASK        =   (PCNET_TX_RING_SIZE-1)
        PCNET_TX_RING_LEN_BITS        =   (PCNET_LOG_TX_BUFFERS shl 12)

        PCNET_RX_RING_SIZE            =   4
        PCNET_RX_RING_MOD_MASK        =   (PCNET_RX_RING_SIZE-1)
        PCNET_RX_RING_LEN_BITS        =   (PCNET_LOG_RX_BUFFERS shl 4)

        PCNET_PKT_BUF_SZ              =   1544
        PCNET_PKT_BUF_SZ_NEG          =   0xf9f8

        PCNET_WIO_RDP                 =   0x10
        PCNET_WIO_RAP                 =   0x12
        PCNET_WIO_RESET               =   0x14
        PCNET_WIO_BDP                 =   0x16
        PCNET_DWIO_RDP                =   0x10
        PCNET_DWIO_RAP                =   0x14
        PCNET_DWIO_RESET              =   0x18
        PCNET_DWIO_BDP                =   0x1C
        PCNET_TOTAL_SIZE              =   0x20

; CSR registers

        PCNET_CSR_CSR                 =   0x00
        PCNET_CSR_IAB0                =   0x01
        PCNET_CSR_IAB1                =   0x02
        PCNET_CSR_IMR                 =   0x03
        PCNET_CSR_TFEAT               =   0x04
        PCNET_CSR_EXTCTL1             =   0x05
        PCNET_CSR_DTBLLEN             =   0x06
        PCNET_CSR_EXTCTL2             =   0x07
        PCNET_CSR_MAR0                =   0x08
        PCNET_CSR_MAR1                =   0x09
        PCNET_CSR_MAR2                =   0x0A
        PCNET_CSR_MAR3                =   0x0B
        PCNET_CSR_PAR0                =   0x0C
        PCNET_CSR_PAR1                =   0x0D
        PCNET_CSR_PAR2                =   0x0E
        PCNET_CSR_MODE                =   0x0F
        PCNET_CSR_RXADDR0             =   0x18
        PCNET_CSR_RXADDR1             =   0x19
        PCNET_CSR_TXADDR0             =   0x1E
        PCNET_CSR_TXADDR1             =   0x1F
        PCNET_CSR_TXPOLL              =   0x2F
        PCNET_CSR_RXPOLL              =   0x31
        PCNET_CSR_RXRINGLEN           =   0x4C
        PCNET_CSR_TXRINGLEN           =   0x4E
        PCNET_CSR_DMACTL              =   0x50
        PCNET_CSR_BUSTIMER            =   0x52
        PCNET_CSR_MEMERRTIMEO         =   0x64
        PCNET_CSR_ONNOWMISC           =   0x74
        PCNET_CSR_ADVFEAT             =   0x7A
        PCNET_CSR_MACCFG              =   0x7D
        PCNET_CSR_CHIPID0             =   0x58
        PCNET_CSR_CHIPID1             =   0x59

; Control and Status Register (CSR0)

        PCNET_CSR_INIT                =   1 shl 0
        PCNET_CSR_START               =   1 shl 1
        PCNET_CSR_STOP                =   1 shl 2
        PCNET_CSR_TX                  =   1 shl 3
        PCNET_CSR_TXON                =   1 shl 4
        PCNET_CSR_RXON                =   1 shl 5
        PCNET_CSR_INTEN               =   1 shl 6
        PCNET_CSR_INTR                =   1 shl 7
        PCNET_CSR_IDONE               =   1 shl 8
        PCNET_CSR_TINT                =   1 shl 9
        PCNET_CSR_RINT                =   1 shl 10
        PCNET_CSR_MERR                =   1 shl 11
        PCNET_CSR_MISS                =   1 shl 12
        PCNET_CSR_CERR                =   1 shl 13

; Interrupt masks and deferral control (CSR3)

        PCNET_IMR_BSWAP               =   0x0004
        PCNET_IMR_ENMBA               =   0x0008  ; enable modified backoff alg
        PCNET_IMR_DXMT2PD             =   0x0010
        PCNET_IMR_LAPPEN              =   0x0020  ; lookahead packet processing enb
        PCNET_IMR_DXSUFLO             =   0x0040  ; disable TX stop on underflow
        PCNET_IMR_IDONE               =   0x0100
        PCNET_IMR_TINT                =   0x0200
        PCNET_IMR_RINT                =   0x0400
        PCNET_IMR_MERR                =   0x0800
        PCNET_IMR_MISS                =   0x1000

        PCNET_IMR                     =   PCNET_IMR_TINT+PCNET_IMR_RINT+PCNET_IMR_IDONE+PCNET_IMR_MERR+PCNET_IMR_MISS

; Test and features control (CSR4)

        PCNET_TFEAT_TXSTRTMASK        =   0x0004
        PCNET_TFEAT_TXSTRT            =   0x0008
        PCNET_TFEAT_RXCCOFLOWM        =   0x0010  ; Rx collision counter oflow
        PCNET_TFEAT_RXCCOFLOW         =   0x0020
        PCNET_TFEAT_UINT              =   0x0040
        PCNET_TFEAT_UINTREQ           =   0x0080
        PCNET_TFEAT_MISSOFLOWM        =   0x0100
        PCNET_TFEAT_MISSOFLOW         =   0x0200
        PCNET_TFEAT_STRIP_FCS         =   0x0400
        PCNET_TFEAT_PAD_TX            =   0x0800
        PCNET_TFEAT_TXDPOLL           =   0x1000
        PCNET_TFEAT_DMAPLUS           =   0x4000

; Extended control and interrupt 1 (CSR5)

        PCNET_EXTCTL1_SPND            =   0x0001  ; suspend
        PCNET_EXTCTL1_MPMODE          =   0x0002  ; magic packet mode
        PCNET_EXTCTL1_MPENB           =   0x0004  ; magic packet enable
        PCNET_EXTCTL1_MPINTEN         =   0x0008  ; magic packet interrupt enable
        PCNET_EXTCTL1_MPINT           =   0x0010  ; magic packet interrupt
        PCNET_EXTCTL1_MPPLBA          =   0x0020  ; magic packet phys. logical bcast
        PCNET_EXTCTL1_EXDEFEN         =   0x0040  ; excessive deferral interrupt enb.
        PCNET_EXTCTL1_EXDEF           =   0x0080  ; excessive deferral interrupt
        PCNET_EXTCTL1_SINTEN          =   0x0400  ; system interrupt enable
        PCNET_EXTCTL1_SINT            =   0x0800  ; system interrupt
        PCNET_EXTCTL1_LTINTEN         =   0x4000  ; last TX interrupt enb
        PCNET_EXTCTL1_TXOKINTD        =   0x8000  ; TX OK interrupt disable

; RX/TX descriptor len (CSR6)

        PCNET_DTBLLEN_RLEN            =   0x0F00
        PCNET_DTBLLEN_TLEN            =   0xF000

; Extended control and interrupt 2 (CSR7)

        PCNET_EXTCTL2_MIIPDTINTE      =   0x0001
        PCNET_EXTCTL2_MIIPDTINT       =   0x0002
        PCNET_EXTCTL2_MCCIINTE        =   0x0004
        PCNET_EXTCTL2_MCCIINT         =   0x0008
        PCNET_EXTCTL2_MCCINTE         =   0x0010
        PCNET_EXTCTL2_MCCINT          =   0x0020
        PCNET_EXTCTL2_MAPINTE         =   0x0040
        PCNET_EXTCTL2_MAPINT          =   0x0080
        PCNET_EXTCTL2_MREINTE         =   0x0100
        PCNET_EXTCTL2_MREINT          =   0x0200
        PCNET_EXTCTL2_STINTE          =   0x0400
        PCNET_EXTCTL2_STINT           =   0x0800
        PCNET_EXTCTL2_RXDPOLL         =   0x1000
        PCNET_EXTCTL2_RDMD            =   0x2000
        PCNET_EXTCTL2_RXFRTG          =   0x4000
        PCNET_EXTCTL2_FASTSPNDE       =   0x8000

; Mode (CSR15)

        PCNET_MODE_RXD                =   0x0001  ; RX disable
        PCNET_MODE_TXD                =   0x0002  ; TX disable
        PCNET_MODE_LOOP               =   0x0004  ; loopback enable
        PCNET_MODE_TXCRCD             =   0x0008
        PCNET_MODE_FORCECOLL          =   0x0010
        PCNET_MODE_RETRYD             =   0x0020
        PCNET_MODE_INTLOOP            =   0x0040
        PCNET_MODE_PORTSEL            =   0x0180
        PCNET_MODE_RXVPAD             =   0x2000
        PCNET_MODE_RXNOBROAD          =   0x4000
        PCNET_MODE_PROMISC            =   0x8000

; BCR (Bus Control Registers)

        PCNET_BCR_MMRA                =   0x00    ; Master Mode Read Active
        PCNET_BCR_MMW                 =   0x01    ; Master Mode Write Active
        PCNET_BCR_MISCCFG             =   0x02
        PCNET_BCR_LED0                =   0x04
        PCNET_BCR_LED1                =   0x05
        PCNET_BCR_LED2                =   0x06
        PCNET_BCR_LED3                =   0x07
        PCNET_BCR_DUPLEX              =   0x09
        PCNET_BCR_BUSCTL              =   0x12
        PCNET_BCR_EECTL               =   0x13
        PCNET_BCR_SSTYLE              =   0x14
        PCNET_BCR_PCILAT              =   0x16
        PCNET_BCR_PCISUBVENID         =   0x17
        PCNET_BCR_PCISUBSYSID         =   0x18
        PCNET_BCR_SRAMSIZE            =   0x19
        PCNET_BCR_SRAMBOUND           =   0x1A
        PCNET_BCR_SRAMCTL             =   0x1B
        PCNET_BCR_MIICTL              =   0x20
        PCNET_BCR_MIIADDR             =   0x21
        PCNET_BCR_MIIDATA             =   0x22
        PCNET_BCR_PCIVENID            =   0x23
        PCNET_BCR_PCIPCAP             =   0x24
        PCNET_BCR_DATA0               =   0x25
        PCNET_BCR_DATA1               =   0x26
        PCNET_BCR_DATA2               =   0x27
        PCNET_BCR_DATA3               =   0x28
        PCNET_BCR_DATA4               =   0x29
        PCNET_BCR_DATA5               =   0x2A
        PCNET_BCR_DATA6               =   0x2B
        PCNET_BCR_DATA7               =   0x2C
        PCNET_BCR_ONNOWPAT0           =   0x2D
        PCNET_BCR_ONNOWPAT1           =   0x2E
        PCNET_BCR_ONNOWPAT2           =   0x2F
        PCNET_BCR_PHYSEL              =   0x31

; RX status register

        PCNET_RXSTAT_BPE              =   0x0080  ; bus parity error
        PCNET_RXSTAT_ENP              =   0x0100  ; end of packet
        PCNET_RXSTAT_STP              =   0x0200  ; start of packet
        PCNET_RXSTAT_BUFF             =   0x0400  ; buffer error
        PCNET_RXSTAT_CRC              =   0x0800  ; CRC error
        PCNET_RXSTAT_OFLOW            =   0x1000  ; rx overrun
        PCNET_RXSTAT_FRAM             =   0x2000  ; framing error
        PCNET_RXSTAT_ERR              =   0x4000  ; error summary
        PCNET_RXSTAT_OWN              =   0x8000

; TX status register

        PCNET_TXSTAT_TRC              =   0x0000000F      ; transmit retries
        PCNET_TXSTAT_RTRY             =   0x04000000      ; retry
        PCNET_TXSTAT_LCAR             =   0x08000000      ; lost carrier
        PCNET_TXSTAT_LCOL             =   0x10000000      ; late collision
        PCNET_TXSTAT_EXDEF            =   0x20000000      ; excessive deferrals
        PCNET_TXSTAT_UFLOW            =   0x40000000      ; transmit underrun
        PCNET_TXSTAT_BUFF             =   0x80000000      ; buffer error

        PCNET_TXCTL_OWN               =   0x80000000
        PCNET_TXCTL_ERR               =   0x40000000      ; error summary
        PCNET_TXCTL_ADD_FCS           =   0x20000000      ; add FCS to pkt
        PCNET_TXCTL_MORE_LTINT        =   0x10000000
        PCNET_TXCTL_ONE               =   0x08000000
        PCNET_TXCTL_DEF               =   0x04000000
        PCNET_TXCTL_STP               =   0x02000000
        PCNET_TXCTL_ENP               =   0x01000000
        PCNET_TXCTL_BPE               =   0x00800000
        PCNET_TXCTL_MBO               =   0x0000F000
        PCNET_TXCTL_BUFSZ             =   0x00000FFF




section '.flat' code readable align 16

;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;                        ;;
;; proc START             ;;
;;                        ;;
;; (standard driver proc) ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;

proc START stdcall, state:dword

        cmp [state], 1
        jne .exit

  .entry:

        DEBUGF 1,"Loading PCnet driver\n"
        stdcall RegService, my_service, service_proc
        ret

  .fail:
  .exit:
        xor eax, eax
        ret

endp


;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;                        ;;
;; proc SERVICE_PROC      ;;
;;                        ;;
;; (standard driver proc) ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;

align 4
proc service_proc stdcall, ioctl:dword

        mov     edx, [ioctl]
        mov     eax, [IOCTL.io_code]

;------------------------------------------------------

        cmp     eax, 0 ;SRV_GETVERSION
        jne     @F

        cmp     [IOCTL.out_size], 4
        jl      .fail
        mov     eax, [IOCTL.output]
        mov     [eax], dword API_VERSION

        xor     eax, eax
        ret

;------------------------------------------------------
  @@:
        cmp     eax, 1 ;SRV_HOOK
        jne     .fail

        cmp     [IOCTL.inp_size], 3               ; Data input must be at least 3 bytes
        jl      .fail

        mov     eax, [IOCTL.input]
        cmp     byte [eax], 1                           ; 1 means device number and bus number (pci) are given
        jne     .fail                                   ; other types arent supported for this card yet

; check if the device is already listed

        mov     ecx, [devices]
        test    ecx, ecx
        jz      .firstdevice

        mov     esi, device_list
;        mov     eax, [IOCTL.input]                      ; get the pci bus and device numbers
        mov     ax , [eax+1]                            ;
  .nextdevice:
        mov     ebx, [esi]
        cmp     ax , word [device.pci_bus]              ; compare with pci and device num in device list (notice the usage of word instead of byte)
        je      .find_devicenum                         ; Device is already loaded, let's find it's device number
        add     esi, 4
        loop    .nextdevice

; This device doesnt have its own eth_device structure yet, lets create one

  .firstdevice:
        cmp     [devices], MAX_DEVICES                  ; First check if the driver can handle one more card
        jge     .fail

        allocate_and_clear ebx, device_size, .fail

; Fill in the direct call addresses into the struct

        mov     [device.reset], reset
        mov     [device.transmit], transmit
        mov     [device.get_MAC], read_mac
        mov     [device.set_MAC], write_mac
        mov     [device.unload], unload
        mov     [device.name], my_service

; save the pci bus and device numbers

        mov     eax, [IOCTL.input]
        mov     cl , [eax+1]
        mov     [device.pci_bus], cl
        mov     cl , [eax+2]
        mov     [device.pci_dev], cl

; Now, it's time to find the base io addres of the PCI device

        find_io [device.pci_bus], [device.pci_dev], [device.io_addr]

; We've found the io address, find IRQ now

        find_irq [device.pci_bus], [device.pci_dev], [device.irq_line]

        DEBUGF  1,"Hooking into device, dev:%x, bus:%x, irq:%x, addr:%x\n",\
        [device.pci_dev]:1,[device.pci_bus]:1,[device.irq_line]:1,[device.io_addr]:4

        allocate_and_clear [device.tx_buffer], PCNET_RX_RING_SIZE * (PCNET_PKT_BUF_SZ + buf_head.size), .err
        allocate_and_clear [device.rx_buffer], PCNET_TX_RING_SIZE * (PCNET_PKT_BUF_SZ + buf_head.size), .err

; Ok, the eth_device structure is ready, let's probe the device
; Because initialization fires IRQ, IRQ handler must be aware of this device
        mov     eax, [devices]                                        ; Add the device structure to our device list
        mov     [device_list+4*eax], ebx                                 ; (IRQ handler uses this list to find device)
        inc     [devices]                                             ;

        call    probe                                                   ; this function will output in eax
        test    eax, eax
        jnz     .destroy                                                        ; If an error occured, exit

        mov     [device.type], NET_TYPE_ETH
        call    NetRegDev
        cmp     eax, -1
        je      .destroy

        ret

; If the device was already loaded, find the device number and return it in eax

  .find_devicenum:
        DEBUGF  1,"Trying to find device number of already registered device\n"
        call    NetPtrToNum                                             ; This kernel procedure converts a pointer to device struct in ebx
                                                                        ; into a device number in edi
        mov     eax, edi                                                ; Application wants it in eax instead
        DEBUGF  1,"Kernel says: %u\n", eax
        ret

; If an error occured, remove all allocated data and exit (returning -1 in eax)

  .destroy:
        ; todo: reset device into virgin state

        dec     [devices]
  .err:
        DEBUGF  1,"Error, removing all data !\n"
        stdcall KernelFree, [device.rx_buffer]
        stdcall KernelFree, [device.tx_buffer]
        stdcall KernelFree, ebx

  .fail:
        or      eax, -1
        ret

;------------------------------------------------------
endp


;;/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\;;
;;                                                                        ;;
;;        Actual Hardware dependent code starts here                      ;;
;;                                                                        ;;
;;/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\;;

align 4
unload:
        ; TODO: (in this particular order)
        ;
        ; - Stop the device
        ; - Detach int handler
        ; - Remove device from local list (RTL8139_LIST)
        ; - call unregister function in kernel
        ; - Remove all allocated structures and buffers the card used

        or      eax,-1

ret


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;;  probe: enables the device (if it really is a PCnet device)
;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

align 4
probe:
        mov     edx, [device.io_addr]

        call    wio_reset

        xor     ecx, ecx
        call    wio_read_csr
        cmp     eax, 4
        jne     .try_dwio

        ; Try Word I/O
        mov     ax , 88
        add     edx, PCNET_WIO_RAP
        out     dx , ax
        nop
        nop
        in      ax , dx
        sub     edx, PCNET_WIO_RAP
        cmp     ax , 88
        jne     .try_dwio

        call    switch_to_wio

        jmp     .L1

  .try_dwio:
        call    dwio_reset

        xor     ecx, ecx
        call    dwio_read_csr
        cmp     eax, 4
        jne     .no_dev

        ; Try Dword I/O
        add     edx, PCNET_DWIO_RAP
        mov     eax, 88
        out     dx , eax
        nop
        nop
        in      eax, dx
        sub     edx, PCNET_DWIO_RAP
        and     eax, 0xffff
        cmp     eax, 88
        jne     .no_dev

        call    switch_to_dwio

        jmp     .L1

  .no_dev:
        DEBUGF 1,"PCnet device not found!\n"
        mov     eax, 1
        ret
  .L1:

        mov     ecx, PCNET_CSR_CHIPID0
        call    [device.access_read_csr]
        mov     esi, eax

        mov     ecx, PCNET_CSR_CHIPID1
        call    [device.access_read_csr]
        shl     eax, 16
        or      eax, esi

        mov     ecx, eax
        and     ecx, 0xfff
        cmp     ecx, 3
        jne     .no_dev

        shr     eax, 12
        and     eax, 0xffff
        mov     [device.chip_version], eax

        DEBUGF 1,"chip version ok\n"
        mov     [device.fdx], 0
        mov     [device.mii], 0
        mov     [device.fset], 0
        mov     [device.dxsuflo], 0
        mov     [device.ltint], 0

        cmp     eax, 0x2420
        je      .L2
        cmp     eax, 0x2430
        je      .L2

        mov     [device.fdx], 1

        cmp     eax, 0x2621
        je      .L4
        cmp     eax, 0x2623
        je      .L5
        cmp     eax, 0x2624
        je      .L6
        cmp     eax, 0x2625
        je      .L7
        cmp     eax, 0x2626
        je      .L8
        cmp     eax, 0x2627
        je      .L9

        DEBUGF 1,"Invalid chip rev\n"
        jmp     .no_dev
  .L2:
        mov     [device.name], device_l2
        jmp     .L10
  .L4:
        mov     [device.name], device_l4
;        mov     [device.fdx], 1
        jmp     .L10
  .L5:
        mov     [device.name], device_l5
;        mov     [device.fdx], 1
        mov     [device.mii], 1
        mov     [device.fset], 1
        mov     [device.ltint], 1
        jmp     .L10
  .L6:
        mov     [device.name], device_l6
;        mov     [device.fdx], 1
        mov     [device.mii], 1
        mov     [device.fset], 1
        jmp     .L10
  .L7:
        mov     [device.name], device_l7
;        mov     [device.fdx], 1
        mov     [device.mii], 1
        jmp     .L10
  .L8:
        mov     [device.name], device_l8
;        mov     [device.fdx], 1
        mov     ecx, PCNET_CSR_RXPOLL
        call    dword [device.access_read_bcr]
        call    dword [device.access_write_bcr]
        jmp     .L10
  .L9:
        mov     [device.name], device_l9
;        mov     [device.fdx], 1
        mov     [device.mii], 1
  .L10:
        DEBUGF 1,"device name: %s\n",[device.name]

        cmp     [device.fset], 1
        jne     .L11
        mov     ecx, PCNET_BCR_BUSCTL
        call    [device.access_read_bcr]
        or      eax, 0x800
        call    [device.access_write_bcr]

        mov     ecx, PCNET_CSR_DMACTL
        call    [device.access_read_csr]
;        and     eax, 0xc00
;        or      eax, 0xc00
        mov     eax, 0xc00
        call    [device.access_write_csr]

        mov     [device.dxsuflo],1
        mov     [device.ltint],1
  .L11:

        make_bus_master [device.pci_bus], [device.pci_dev]

        mov     eax, PCNET_PORT_ASEL
        mov     [device.options], eax
        mov     [device.mode_], word 0x0003
        mov     [device.tlen_rlen], word (PCNET_TX_RING_LEN_BITS or PCNET_RX_RING_LEN_BITS)

        mov     dword [device.filter], 0
        mov     dword [device.filter+4], 0

        mov     eax, PCNET_IMR
        mov     ecx, PCNET_CSR_IMR                      ; Write interrupt mask
        call    [device.access_write_csr]

align 4
reset:

; attach int handler

        movzx   eax, [device.irq_line]
        DEBUGF  1,"Attaching int handler to irq %x\n",eax:1
        stdcall AttachIntHandler, eax, int_handler, dword 0
        test    eax, eax
        jnz     @f
        DEBUGF  1,"\nCould not attach int handler!\n"
;        or      eax, -1
;        ret
  @@:

        mov     edx, [device.io_addr]
        call    [device.access_reset]

        ; Switch pcnet32 to 32bit mode
        mov     ecx, PCNET_BCR_SSTYLE
        mov     eax, 2
        call    [device.access_write_bcr]

        ; set/reset autoselect bit
        mov     ecx, PCNET_BCR_MISCCFG
        call    [device.access_read_bcr]
        and     eax,not 2
        test    [device.options], PCNET_PORT_ASEL
        jz      .L1
        or      eax, 2
  .L1:
        call    [device.access_write_bcr]


        ; Handle full duplex setting
        cmp     byte [device.full_duplex], 0
        je      .L2
        mov     ecx, PCNET_BCR_DUPLEX
        call    [device.access_read_bcr]
        and     eax, not 3
        test    [device.options], PCNET_PORT_FD
        jz      .L3
        or      eax, 1
        cmp     [device.options], PCNET_PORT_FD or PCNET_PORT_AUI
        jne     .L4
        or      eax, 2
        jmp     .L4
  .L3:
        test    [device.options], PCNET_PORT_ASEL
        jz      .L4
        cmp     [device.chip_version], 0x2627
        jne     .L4
        or      eax, 3
  .L4:
        mov     ecx, PCNET_BCR_DUPLEX
        call    [device.access_write_bcr]
  .L2:


        ; set/reset GPSI bit in test register
        mov     ecx, 124
        call    [device.access_read_csr]
        mov     ecx, [device.options]
        and     ecx, PCNET_PORT_PORTSEL
        cmp     ecx, PCNET_PORT_GPSI
        jne     .L5
        or      eax, 0x10
  .L5:
        call    [device.access_write_csr]
        cmp     [device.mii], 0
        je      .L6
        test    [device.options], PCNET_PORT_ASEL
        jnz     .L6
        mov     ecx, PCNET_BCR_MIICTL
        call    [device.access_read_bcr]
        and     eax,not 0x38
        test    [device.options], PCNET_PORT_FD
        jz      .L7
        or      eax, 0x10
  .L7:
        test    [device.options], PCNET_PORT_100
        jz      .L8
        or      eax, 0x08
  .L8:
        call    [device.access_write_bcr]
        jmp     .L9
.L6:
        test    [device.options], PCNET_PORT_ASEL
        jz      .L9
        mov     ecx, PCNET_BCR_MIICTL
        DEBUGF 1,"ASEL, enable auto-negotiation\n"
        call    [device.access_read_bcr]
        and     eax, not 0x98
        or      eax, 0x20
        call    [device.access_write_bcr]
.L9:
        cmp     [device.ltint],0
        je      .L10
        mov     ecx,5
        call    [device.access_read_csr]
        or      eax,(1 shl 14)
        call    [device.access_write_csr]
.L10:
        mov     eax,[device.options]
        and     eax,PCNET_PORT_PORTSEL
        shl     eax,7
        mov     [device.mode_],ax
        mov     dword [device.filter], -1
        mov     dword [device.filter+4], -1

        call    read_mac

        lea     esi, [device.mac]
        lea     edi, [device.phys_addr]
        movsd
        movsw

        call    init_ring

        lea     eax, [device.private]
        GetRealAddr

        push    eax
        and     eax, 0xffff
        mov     ecx, 1
        call    [device.access_write_csr]
        pop     eax
        shr     eax,16
        mov     ecx,2
        call    [device.access_write_csr]

        mov     ecx,4
        mov     eax,0x0915
        call    [device.access_write_csr]

        mov     ecx,0
        mov     eax,1
        call    [device.access_write_csr]

        mov     [device.tx_full],0
        mov     [device.cur_rx],0
        mov     [device.cur_tx],0
        mov     [device.dirty_rx],0
        mov     [device.dirty_tx],0

        mov     ecx,100
.L11:
        push    ecx
        xor     ecx,ecx
        call    [device.access_read_csr]
        pop     ecx
        test    ax,0x100
        jnz     .L12
        loop    .L11
.L12:

        DEBUGF 1,"hardware reset\n"
        xor     ecx, ecx
        mov     eax, 0x0002
        call    [device.access_write_csr]

        xor     ecx, ecx
        call    [device.access_read_csr]

        xor     ecx, ecx
        mov     eax, PCNET_CSR_INTEN or PCNET_CSR_START
        call    [device.access_write_csr]

; Set the mtu, kernel will be able to send now
        mov     [device.mtu], 1514

        DEBUGF 1,"PCNET reset complete\n"
        xor     eax, eax
        ret


align 4
init_ring:

        mov     ecx, PCNET_RX_RING_SIZE
        mov     edi, [device.rx_buffer]
        mov     eax, edi
        GetRealAddr
        mov     [device.rx_ring_phys], eax
        add     eax, PCNET_RX_RING_SIZE * buf_head.size
  .rx_init:
        mov     [edi + buf_head.base], eax
        mov     [edi + buf_head.length], PCNET_PKT_BUF_SZ_NEG
        mov     [edi + buf_head.status], 0x8000
        and     dword [edi + buf_head.msg_length], 0
        and     dword [edi + buf_head.reserved], 0
        add     eax, PCNET_PKT_BUF_SZ
        add     edi, buf_head.size
        loop    .rx_init

        mov     ecx, PCNET_TX_RING_SIZE
        mov     edi, [device.tx_buffer]
        mov     eax, edi
        GetRealAddr
        mov     [device.tx_ring_phys], eax
        add     eax, PCNET_TX_RING_SIZE * buf_head.size
  .tx_init:
        mov     [edi + buf_head.base], eax
        and     dword [edi + buf_head.length], 0
        and     dword [edi + buf_head.msg_length], 0
        and     dword [edi + buf_head.reserved], 0
        add     eax, PCNET_PKT_BUF_SZ
        add     edi, buf_head.size
        loop    .tx_init

        mov     [device.tlen_rlen], (PCNET_TX_RING_LEN_BITS or PCNET_RX_RING_LEN_BITS)

        ret




;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;                                         ;;
;; Transmit                                ;;
;;                                         ;;
;; In: buffer pointer in [esp+4]           ;;
;;     size of buffer in [esp+8]           ;;
;;     pointer to device structure in ebx  ;;
;;                                         ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

align 4
transmit:
        DEBUGF  1,"Transmitting packet, buffer:%x, size:%u\n",[esp+4],[esp+8]
        mov     eax, [esp+4]
        DEBUGF  1,"To: %x-%x-%x-%x-%x-%x From: %x-%x-%x-%x-%x-%x Type:%x%x\n",\
        [eax+00]:2,[eax+01]:2,[eax+02]:2,[eax+03]:2,[eax+04]:2,[eax+05]:2,\
        [eax+06]:2,[eax+07]:2,[eax+08]:2,[eax+09]:2,[eax+10]:2,[eax+11]:2,\
        [eax+13]:2,[eax+12]:2

        cmp     dword [esp+8], 1514
        jg      .nospace                        ; packet is too long
        cmp     dword [esp+8], 60
        jl      .nospace                        ; packet is too short

; check descriptor
        movzx   eax, [device.cur_tx]
        imul    edi, eax, PCNET_PKT_BUF_SZ
        shl     eax, 4
        add     eax, [device.tx_buffer]
        add     edi, [device.tx_buffer]
        add     edi, PCNET_TX_RING_SIZE * buf_head.size

        test    byte [eax + buf_head.status + 1], 80h
        jnz     .nospace
; descriptor is free, copy data
        mov     esi, [esp+4]
        mov     ecx, [esp+8]
        mov     edx, ecx
        shr     ecx, 2
        and     edx, 3
        rep     movsd
        mov     ecx, edx
        rep     movsb
; set length
        mov     ecx, [esp+8]
        neg     ecx
        mov     [eax + buf_head.length], cx
; put to transfer queue
        mov     [eax + buf_head.status], 0x8300

; trigger an immediate send
        xor     ecx, ecx         ; CSR0
        call    [device.access_read_csr]
        or      eax, PCNET_CSR_TX
        call    [device.access_write_csr]

; get next descriptor 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, ...
        inc     [device.cur_tx]
        and     [device.cur_tx], 3
        DEBUGF  2," - Packet Sent! "

; Update stats
        inc     [device.packets_tx]
        mov     eax, [esp+8]
        add     dword [device.bytes_tx], eax
        adc     dword [device.bytes_tx + 4], 0

.finish:
        DEBUGF  2," - Done!\n"
        stdcall KernelFree, [esp+4]
        xor     eax, eax
        ret     8

.nospace:
        DEBUGF  1, 'ERROR: no free transmit descriptors\n'
        stdcall KernelFree, [esp+4]
        or      eax, -1
        ret     8



;;;;;;;;;;;;;;;;;;;;;;;
;;                   ;;
;; Interrupt handler ;;
;;                   ;;
;;;;;;;;;;;;;;;;;;;;;;;

align 4
int_handler:

        DEBUGF  1,"\n%s int\n", my_service

; find pointer of device wich made IRQ occur

        mov     ecx, [devices]
        test    ecx, ecx
        jz      .nothing
        mov     esi, device_list
  .nextdevice:
        mov     ebx, [esi]

        mov     edx, [device.io_addr]     ; get IRQ reason
        push    ecx
        xor     ecx, ecx ; CSR0
        call    [device.access_read_csr]
        pop     ecx
        test    al, al
        js      .got_it
  .continue:
        add     esi, 4
        dec     ecx
        jnz     .nextdevice
  .nothing:
        ret                                         ; If no device was found, abort (The irq was probably for a device, not registered to this driver

  .got_it:

        DEBUGF  1,"Device: %x Status: %x ", ebx, eax:2

;-------------------------------------------------------
; Possible reasons:
; initialization done - ignore
; transmit done - ignore
; packet received - handle
; Clear ALL IRQ reasons.
; N.B. One who wants to handle more than one reason must be ready
; to two or more reasons in one IRQ.
        xor     ecx, ecx
        call    [device.access_write_csr]
; Received packet ok?

        test    ax, PCNET_CSR_RINT
        jz      @f

        push    ebx
.receiver_test_loop:
        pop     ebx
        movzx   eax, [device.cur_rx]
;        and     eax, PCNET_RX_RING_MOD_MASK
        mov     edi, eax

        imul    esi, eax, PCNET_PKT_BUF_SZ      ;
        add     esi, [device.rx_buffer]         ; esi now points to rx buffer
        add     esi, PCNET_RX_RING_SIZE * buf_head.size

        shl     edi, 4                          ; desc * 16 (16 is size of one ring entry)
        add     edi, [device.rx_buffer]     ; edi now points to current rx ring entry

        mov     cx , [edi + buf_head.status]

        test    cx , PCNET_RXSTAT_OWN           ; If this bit is set, the controller OWN's the packet, if not, we do
        jnz     .abort

        test    cx , PCNET_RXSTAT_ENP
        jz      .abort

        test    cx , PCNET_RXSTAT_STP
        jz      .abort

        movzx   ecx, [edi + buf_head.msg_length]        ; get packet length in ecx
        sub     ecx, 4                          ;

        push    ecx
        stdcall KernelAlloc, ecx                ; Allocate a buffer to put packet into
        pop     ecx
        test    eax, eax                        ; Test if we allocated succesfully
        jz      .abort                          ;

; Update stats
        add     dword [device.bytes_rx], ecx
        adc     dword [device.bytes_rx + 4], 0
        inc     dword [device.packets_rx]

        push    ebx
        push    .receiver_test_loop             ;
        push    ecx                             ; for eth_receiver
        push    eax                             ;

        xchg    edi, eax
        push    ecx
        shr     ecx, 2
        cld
        rep     movsd
        pop     ecx
        and     ecx, 3
        rep     movsb

;       mov     word [eax + buf_head.length], PCNET_PKT_BUF_SZ_NEG
        mov     word [eax + buf_head.status], PCNET_RXSTAT_OWN      ; Set OWN bit back to 1 (controller may write to tx-buffer again now)

        inc     [device.cur_rx]           ; update descriptor
        and     [device.cur_rx], 3        ;

        jmp     Eth_input

  .abort:

  @@:

        ret




;;;;;;;;;;;;;;;;;;;;;;;
;;                   ;;
;; Write MAC address ;;
;;                   ;;
;;;;;;;;;;;;;;;;;;;;;;;

align 4
write_mac:      ; in: mac pushed onto stack (as 3 words)

        DEBUGF  1,"Writing MAC: %x-%x-%x-%x-%x-%x",[esp+0]:2,[esp+1]:2,[esp+2]:2,[esp+3]:2,[esp+4]:2,[esp+5]:2

        mov     edx, [device.io_addr]
        add     dx, 2
        xor     eax, eax

        mov     ecx, PCNET_CSR_PAR0
       @@:
        pop     ax
        call    [device.access_write_csr]
        DEBUGF  1,"."
        inc     ecx
        cmp     ecx, PCNET_CSR_PAR2
        jl      @r

        DEBUGF  1,"\n"

; Notice this procedure does not ret, but continues to read_mac instead.

;;;;;;;;;;;;;;;;;;;;;;
;;                  ;;
;; Read MAC address ;;
;;                  ;;
;;;;;;;;;;;;;;;;;;;;;;
align 4
read_mac:
        DEBUGF  1,"Reading MAC"

        mov     edx, [device.io_addr]
        add     dx, 6
       @@:
        dec     dx
        dec     dx
        in      ax, dx
        push    ax
        DEBUGF  1,"."
        cmp     edx, [device.io_addr]
        jg      @r

        DEBUGF  1," %x-%x-%x-%x-%x-%x\n",[esp+0]:2,[esp+1]:2,[esp+2]:2,[esp+3]:2,[esp+4]:2,[esp+5]:2

        lea     edi, [device.mac]
        pop     ax
        stosw
        pop     ax
        stosw
        pop     ax
        stosw

        ret

align 4
switch_to_wio:

        DEBUGF  1,"Switching to 16-bit mode\n"

        mov     [device.access_read_csr], wio_read_csr
        mov     [device.access_write_csr], wio_write_csr
        mov     [device.access_read_bcr], wio_read_bcr
        mov     [device.access_write_bcr], wio_write_bcr
        mov     [device.access_read_rap], wio_read_rap
        mov     [device.access_write_rap], wio_write_rap
        mov     [device.access_reset], wio_reset

        ret

align 4
switch_to_dwio:

        DEBUGF  1,"Switching to 32-bit mode\n"

        mov     [device.access_read_csr], dwio_read_csr
        mov     [device.access_write_csr], dwio_write_csr
        mov     [device.access_read_bcr], dwio_read_bcr
        mov     [device.access_write_bcr], dwio_write_bcr
        mov     [device.access_read_rap], dwio_read_rap
        mov     [device.access_write_rap], dwio_write_rap
        mov     [device.access_reset], dwio_reset

        ret


; ecx - index
; return:
; eax - data
align 4
wio_read_csr:

        add     edx, PCNET_WIO_RAP
        mov     ax , cx
        out     dx , ax
        add     edx, PCNET_WIO_RDP - PCNET_WIO_RAP
        in      ax , dx
        and     eax, 0xffff
        sub     edx, PCNET_WIO_RDP

        ret


; eax - data
; ecx - index
align 4
wio_write_csr:

        add     edx, PCNET_WIO_RAP
        xchg    eax, ecx
        out     dx , ax
        xchg    eax, ecx
        add     edx, PCNET_WIO_RDP - PCNET_WIO_RAP
        out     dx , ax
        sub     edx, PCNET_WIO_RDP

        ret


; ecx - index
; return:
; eax - data
align 4
wio_read_bcr:

        add     edx, PCNET_WIO_RAP
        mov     ax , cx
        out     dx , ax
        add     edx, PCNET_WIO_BDP - PCNET_WIO_RAP
        in      ax , dx
        and     eax, 0xffff
        sub     edx, PCNET_WIO_BDP

        ret


; eax - data
; ecx - index
align 4
wio_write_bcr:

        add     edx, PCNET_WIO_RAP
        xchg    eax, ecx
        out     dx , ax
        xchg    eax, ecx
        add     edx, PCNET_WIO_BDP - PCNET_WIO_RAP
        out     dx , ax
        sub     edx, PCNET_WIO_BDP

        ret

align 4
wio_read_rap:

        add     edx, PCNET_WIO_RAP
        in      ax , dx
        and     eax, 0xffff
        sub     edx, PCNET_WIO_RAP

        ret

; eax - val
align 4
wio_write_rap:

        add     edx, PCNET_WIO_RAP
        out     dx , ax
        sub     edx, PCNET_WIO_RAP

        ret

align 4
wio_reset:

        push    eax
        add     edx, PCNET_WIO_RESET
        in      ax , dx
        pop     eax
        sub     edx, PCNET_WIO_RESET

        ret



; ecx - index
; return:
; eax - data
align 4
dwio_read_csr:

        add     edx, PCNET_DWIO_RAP
        mov     eax, ecx
        out     dx , eax
        add     edx, PCNET_DWIO_RDP - PCNET_DWIO_RAP
        in      eax, dx
        and     eax, 0xffff
        sub     edx, PCNET_DWIO_RDP

        ret


; ecx - index
; eax - data
align 4
dwio_write_csr:

        add     edx, PCNET_DWIO_RAP
        xchg    eax, ecx
        out     dx , eax
        add     edx, PCNET_DWIO_RDP - PCNET_DWIO_RAP
        xchg    eax, ecx
        out     dx , eax
        sub     edx, PCNET_DWIO_RDP

        ret

; ecx - index
; return:
; eax - data
align 4
dwio_read_bcr:

        add     edx, PCNET_DWIO_RAP
        mov     eax, ecx
        out     dx , eax
        add     edx, PCNET_DWIO_BDP - PCNET_DWIO_RAP
        in      eax, dx
        and     eax, 0xffff
        sub     edx, PCNET_DWIO_BDP

        ret


; ecx - index
; eax - data
align 4
dwio_write_bcr:

        add     edx, PCNET_DWIO_RAP
        xchg    eax, ecx
        out     dx , eax
        add     edx, PCNET_DWIO_BDP - PCNET_DWIO_RAP
        xchg    eax, ecx
        out     dx , eax
        sub     edx, PCNET_DWIO_BDP

        ret

align 4
dwio_read_rap:

        add     edx, PCNET_DWIO_RAP
        in      eax, dx
        and     eax, 0xffff
        sub     edx, PCNET_DWIO_RAP

        ret


; eax - val
align 4
dwio_write_rap:

        add     edx, PCNET_DWIO_RAP
        out     dx , eax
        sub     edx, PCNET_DWIO_RAP

        ret

align 4
dwio_reset:

        push    eax
        add     edx, PCNET_DWIO_RESET
        in      eax, dx
        pop     eax
        sub     edx, PCNET_DWIO_RESET

        ret



; End of code

align 4                                       ; Place all initialised data here

devices     dd 0
version       dd (5 shl 16) or (API_VERSION and 0xFFFF)
my_service    db 'PCnet',0                    ; max 16 chars include zero

device_l2     db "PCnet/PCI 79C970",0
device_l4     db "PCnet/PCI II 79C970A",0
device_l5     db "PCnet/FAST 79C971",0
device_l6     db "PCnet/FAST+ 79C972",0
device_l7     db "PCnet/FAST III 79C973",0
device_l8     db "PCnet/Home 79C978",0
device_l9     db "PCnet/FAST III 79C975",0

options_mapping:
dd PCNET_PORT_ASEL                                      ;  0 Auto-select
dd PCNET_PORT_AUI                                       ;  1 BNC/AUI
dd PCNET_PORT_AUI                                       ;  2 AUI/BNC
dd PCNET_PORT_ASEL                                      ;  3 not supported
dd PCNET_PORT_10BT or PCNET_PORT_FD                     ;  4 10baseT-FD
dd PCNET_PORT_ASEL                                      ;  5 not supported
dd PCNET_PORT_ASEL                                      ;  6 not supported
dd PCNET_PORT_ASEL                                      ;  7 not supported
dd PCNET_PORT_ASEL                                      ;  8 not supported
dd PCNET_PORT_MII                                       ;  9 MII 10baseT
dd PCNET_PORT_MII or PCNET_PORT_FD                      ; 10 MII 10baseT-FD
dd PCNET_PORT_MII                                       ; 11 MII (autosel)
dd PCNET_PORT_10BT                                      ; 12 10BaseT
dd PCNET_PORT_MII or PCNET_PORT_100                     ; 13 MII 100BaseTx
dd PCNET_PORT_MII or PCNET_PORT_100 or PCNET_PORT_FD    ; 14 MII 100BaseTx-FD
dd PCNET_PORT_ASEL                                      ; 15 not supported

include_debug_strings                                   ; All data wich FDO uses will be included here

section '.data' data readable writable align 16         ; place all uninitialized data place here

device_list rd MAX_DEVICES                                 ; This list contains all pointers to device structures the driver is handling