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0651536c07
kolibrios/drivers/ethernet/RTL8029.asm
hidnplayr 0651536c07 Small bugfix concerning ISA devices 
git-svn-id: svn://kolibrios.org@4974 a494cfbc-eb01-0410-851d-a64ba20cac60
2014-06-14 10:34:31 +00:00

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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2014. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;; RTL8029/ne2000 driver for KolibriOS ;;
;; ;;
;; based on RTL8029.asm driver for menuetos ;;
;; and realtek8029.asm for SolarOS by Eugen Brasoveanu ;;
;; ;;
;; Written by hidnplayr@kolibrios.org ;;
;; with help from CleverMouse ;;
;; ;;
;; GNU GENERAL PUBLIC LICENSE ;;
;; Version 2, June 1991 ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
format MS COFF
API_VERSION = 0x01000100
DRIVER_VERSION = 5
MAX_DEVICES = 16
DEBUG = 1
__DEBUG__ = 1
__DEBUG_LEVEL__ = 2 ; 1 = verbose, 2 = errors only
include '../struct.inc'
include '../macros.inc'
include '../proc32.inc'
include '../imports.inc'
include '../fdo.inc'
include '../netdrv.inc'
virtual at ebx
device:
ETH_DEVICE
.io_addr dd ?
.irq_line db ?
.pci_bus dd ?
.pci_dev dd ?
.flags db ?
.vendor db ?
.memsize db ?
.rx_start db ?
.tx_start db ?
.bmem dd ?
.rmem dd ?
.size = $ - device
end virtual
public START
public service_proc
public version
P0_COMMAND = 0x00
P0_PSTART = 0x01
P0_PSTOP = 0x02
P0_BOUND = 0x03
P0_TSR = 0x04
P0_TPSR = 0x04
P0_TBCR0 = 0x05
P0_TBCR1 = 0x06
P0_ISR = 0x07
P0_RSAR0 = 0x08
P0_RSAR1 = 0x09
P0_RBCR0 = 0x0A
P0_RBCR1 = 0x0B
P0_RSR = 0x0C
P0_RCR = 0x0C
P0_TCR = 0x0D
P0_DCR = 0x0E
P0_IMR = 0x0F
P1_COMMAND = 0x00
P1_PAR0 = 0x01
P1_PAR1 = 0x02
P1_PAR2 = 0x03
P1_PAR3 = 0x04
P1_PAR4 = 0x05
P1_PAR5 = 0x06
P1_CURR = 0x07
P1_MAR0 = 0x08
CMD_PS0 = 0x00 ; Page 0 select
CMD_PS1 = 0x40 ; Page 1 select
CMD_PS2 = 0x80 ; Page 2 select
CMD_RD2 = 0x20 ; Remote DMA control
CMD_RD1 = 0x10
CMD_RD0 = 0x08
CMD_TXP = 0x04 ; transmit packet
CMD_STA = 0x02 ; start
CMD_STP = 0x01 ; stop
CMD_RDMA_READ = 001b shl 3
CMD_RDMA_WRITE = 010b shl 3
CMD_RDMA_SEND_PACKET = 011b shl 3
CMD_RDMA_ABORT = 100b shl 3 ; really is 1xx, Abort/Complete Remote DMA
; RDMA_MASK = 111b shl 3 ; internal, mask
RCR_MON = 0x20 ; monitor mode
DCR_FT1 = 0x40
DCR_LS = 0x08 ; Loopback select
DCR_WTS = 0x01 ; Word transfer select
ISR_PRX = 0x01 ; successful recv
ISR_PTX = 0x02 ; successful xmit
ISR_RXE = 0x04 ; receive error
ISR_TXE = 0x08 ; transmit error
ISR_OVW = 0x10 ; Overflow
ISR_CNT = 0x20 ; Counter overflow
ISR_RDC = 0x40 ; Remote DMA complete
ISR_RST = 0x80 ; reset
IRQ_MASK = ISR_PRX ;+ ISR_PTX ;+ ISR_RDC + ISR_PTX + ISR_TXE
RSTAT_PRX = 1 shl 0 ; successful recv
RSTAT_CRC = 1 shl 1 ; CRC error
RSTAT_FAE = 1 shl 2 ; Frame alignment error
RSTAT_OVER = 1 shl 3 ; FIFO overrun
TXBUF_SIZE = 6
RXBUF_END = 32
PAGE_SIZE = 256
ETH_ZLEN = 60
ETH_FRAME_LEN = 1514
FLAG_PIO = 1 shl 0
FLAG_16BIT = 1 shl 1
VENDOR_NONE = 0
VENDOR_WD = 1
VENDOR_NOVELL = 2
VENDOR_3COM = 3
NE_ASIC = 0x10
NE_RESET = 0x0F ; Used to reset card
NE_DATA = 0x00 ; Used to read/write NIC mem
MEM_8k = 32
MEM_16k = 64
MEM_32k = 128
ISA_MAX_ADDR = 0x400
section '.flat' code readable align 16
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; proc START
;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
align 4
proc START stdcall, state:dword
cmp [state], 1
jne .exit
.entry:
DEBUGF 1, "Loading driver\n"
stdcall RegService, my_service, service_proc
ret
.fail:
.exit:
xor eax, eax
ret
endp
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; proc SERVICE_PROC
;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
align 4
proc service_proc stdcall, ioctl:dword
mov edx, [ioctl]
mov eax, [edx + IOCTL.io_code]
;------------------------------------------------------
;---------------
cmp eax, 0 ;SRV_GETVERSION
jne @F ;---------------
cmp [edx + IOCTL.out_size], 4
jb .fail
mov eax, [edx + IOCTL.output]
mov [eax], dword API_VERSION
xor eax, eax
ret
;------------------------------------------------------
@@: ;---------
cmp eax, 1 ;SRV_HOOK
jne @F ;---------
DEBUGF 1, "Checking if device is already listed..\n"
mov eax, [edx + IOCTL.input]
cmp [edx + IOCTL.inp_size], 3
jb .fail
cmp byte [eax], 1
je .pci
cmp [edx + IOCTL.inp_size], 4
jb .fail
cmp byte [eax], 0
je .isa
jmp .fail
.pci:
; check if the device is already listed
mov esi, device_list
mov ecx, [devices]
test ecx, ecx
jz .firstdevice_pci
mov ax, [eax+1] ; get the pci bus and device numbers
.nextdevice:
mov ebx, [esi]
cmp al, byte[device.pci_bus]
jne @f
cmp ah, byte[device.pci_dev]
je .find_devicenum ; Device is already loaded, let's find it's device number
@@:
add esi, 4
loop .nextdevice
.firstdevice_pci:
call create_new_struct
mov eax, [edx + IOCTL.input]
movzx ecx, byte[eax+1]
mov [device.pci_bus], ecx
movzx ecx, byte[eax+2]
mov [device.pci_dev], ecx
; Now, it's time to find the base io addres of the PCI device
PCI_find_io
; We've found the io address, find IRQ now
PCI_find_irq
jmp .hook
.isa:
mov esi, device_list
mov ecx, [devices]
test ecx, ecx
jz .firstdevice_isa
movzx edi, word [eax+1]
mov al, [eax+3]
.nextdevice_isa:
mov ebx, [esi]
cmp edi, [device.io_addr]
jne .maybenext
cmp al, [device.irq_line]
je find_device_num
.maybenext:
add esi, 4
loop .nextdevice_isa
.firstdevice_isa:
call create_new_struct
mov eax, [edx + IOCTL.input]
movzx ecx, word[eax+1]
mov [device.io_addr], ecx
mov cl, [eax+3]
mov [device.irq_line], cl
.hook:
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
call probe ; this function will output in eax
test eax, eax
jnz .err ; If an error occured, exit
mov eax, [devices]
mov [device_list+4*eax], ebx
inc [devices]
mov [device.type], NET_TYPE_ETH
call NetRegDev
cmp eax, -1
jz .err
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
.err:
DEBUGF 2, "Failed, removing device structure\n"
stdcall KernelFree, ebx
jmp .fail
;------------------------------------------------------
@@:
.fail:
or eax, -1
ret
;------------------------------------------------------
endp
create_new_struct:
cmp [devices], MAX_DEVICES
jae .fail
allocate_and_clear ebx, device.size, .fail ; Allocate the buffer for device structure
mov [device.reset], reset
mov [device.transmit], transmit
mov [device.unload], unload
mov [device.name], my_service
ret
.fail:
add esp, 4 ; return to caller of 'hook'
or eax, -1
ret
find_device_num:
DEBUGF 1, "Trying to find device number of already registered device\n"
mov ebx, eax
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
;;/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\;;
;; ;;
;; Actual Hardware dependent code starts here ;;
;; ;;
;;/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\;;
unload: ; TODO
or eax, -1
ret
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; probe: enables the device and clears the rx buffer
;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
probe:
mov [device.vendor], VENDOR_NONE
mov [device.bmem], 0
DEBUGF 1, "Trying 16-bit mode\n"
mov [device.flags], FLAG_16BIT + FLAG_PIO
mov [device.memsize], MEM_32k
mov [device.tx_start], 64
mov [device.rx_start], TXBUF_SIZE + 64
set_io 0
set_io P0_DCR
mov al, DCR_WTS + DCR_FT1 + DCR_LS ; word transfer select +
out dx, al
set_io P0_PSTART
mov al, MEM_16k
out dx, al
set_io P0_PSTOP
mov al, MEM_32k
out dx, al
mov esi, my_service
mov di, 16384
mov cx, 14
call PIO_write
mov si, 16384
mov cx, 14
sub esp, 16
mov edi, esp
call PIO_read
mov esi, esp
add esp, 16
mov edi, my_service
mov ecx, 13
repe cmpsb
je ep_set_vendor
DEBUGF 1, "16-bit mode failed\n"
DEBUGF 1, "Trying 8-bit mode\n"
mov [device.flags], FLAG_PIO
mov [device.memsize], MEM_16k
mov [device.tx_start], 32
mov [device.rx_start], TXBUF_SIZE + 32
set_io NE_ASIC + NE_RESET
in al, dx
out dx, al
in al, 0x84
set_io P0_COMMAND
mov al, CMD_RD2 + CMD_STP
out dx, al
set_io P0_RCR
mov al, RCR_MON
out dx, al
set_io P0_DCR
mov al, DCR_FT1 + DCR_LS
out dx, al
set_io P0_PSTART
mov al, MEM_8k
out dx, al
set_io P0_PSTOP
mov al, MEM_16k
out dx, al
mov esi, my_service
mov di, 8192
mov cx, 14
call PIO_write
mov si, 8192
mov cx, 14
sub esp, 16
mov edi, esp
call PIO_read
mov esi, my_service
mov edi, esp
add esp, 16
mov ecx, 13
repe cmpsb
je ep_set_vendor
DEBUGF 2, "This is not a valid ne2000 device!\n"
or eax, -1
ret
ep_set_vendor:
DEBUGF 1, "Mode ok\n"
cmp [device.io_addr], ISA_MAX_ADDR
jbe .isa
DEBUGF 1, "Card is using PCI bus\n"
mov [device.vendor], VENDOR_NOVELL ;;; FIXME
jmp ep_check_have_vendor
.isa:
DEBUGF 1, "Card is using ISA bus\n"
mov [device.vendor], VENDOR_NOVELL
ep_check_have_vendor:
mov al, [device.vendor]
cmp al, VENDOR_NONE
; je exit
cmp al, VENDOR_3COM
je reset
mov eax, [device.bmem]
mov [device.rmem], eax
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; reset: Place the chip into a virgin state
;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
reset:
DEBUGF 1, "Resetting device\n"
; 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 2, "Could not attach int handler!\n"
; or eax, -1
; ret
@@:
; Stop card + DMA
set_io 0
; set_io P0_COMMAND
mov al, CMD_PS0 + CMD_RDMA_ABORT + CMD_STP
out dx, al
; initialize DCR
set_io P0_DCR
mov al, DCR_FT1 + DCR_LS
test [device.flags], FLAG_16BIT
jz @f
or al, DCR_WTS ; word transfer select
@@:
out dx, al
; clear remote bytes count
set_io P0_RBCR0
xor al, al
out dx, al
set_io P0_RBCR1
out dx, al
; initialize Receive configuration register (until all init is done)
set_io P0_RCR
mov al, 0x20 ; monitor mode
out dx, al
; transmit configuration register to monitor mode (until all ini is done)
set_io P0_TCR
mov al, 2 ; internal loopback
out dx, al
; clear interupt status
set_io P0_ISR
mov al, 0xff
out dx, al
; clear IRQ mask ;;;;; CHECKME ;;;;;
set_io P0_IMR
xor al, al
out dx, al
; set transmit pointer
set_io P0_TPSR
mov al, [device.tx_start]
out dx, al
; set pagestart pointer
set_io P0_PSTART
mov al, [device.rx_start]
out dx, al
; set pagestop pointer
set_io P0_PSTOP
mov al, [device.memsize]
out dx, al
; set boundary pointer
set_io P0_BOUND
mov al, [device.memsize]
dec al
out dx, al
; set curr pointer
set_io P0_COMMAND
mov al, CMD_PS1 ;+ CMD_RD2 + CMD_STP ; page 1, stop mode
out dx, al
set_io P1_CURR
mov al, [device.rx_start]
out dx, al
set_io P0_COMMAND
mov al, CMD_PS0 ;+ CMD_RD2 + CMD_STA ; go to page 0, start mode
out dx, al
; Read MAC address and set it to registers
call read_mac
push .macret
sub esp, 6
lea esi, [device.mac]
mov edi, esp
movsd
movsw
jmp write_mac
.macret:
; set IRQ mask
set_io 0
set_io P0_IMR
mov al, IRQ_MASK
out dx, al
; start mode
set_io P0_COMMAND
mov al, CMD_STA
out dx, al
; clear transmit control register
set_io P0_TCR
xor al, al ; no loopback
out dx, al
; set receive control register ;;;;
set_io P0_RCR
mov al, 4 ; accept broadcast
out dx, al
; clear packet/byte counters
xor eax, eax
lea edi, [device.bytes_tx]
mov ecx, 6
rep stosd
; Set the mtu, kernel will be able to send now
mov [device.mtu], ETH_FRAME_LEN
; Set link state to unknown
mov [device.state], ETH_LINK_UNKOWN
; Indicate that we have successfully reset the card
xor eax, eax
DEBUGF 1, "Done!\n"
ret
;***************************************************************************
; Function
; transmit
; buffer in [esp+4], size in [esp+8], pointer to device struct in ebx
;***************************************************************************
align 4
transmit:
mov esi, [esp + 4]
mov ecx, [esp + 8]
DEBUGF 1, "Transmitting packet, buffer:%x, size:%u\n",esi, ecx
DEBUGF 1, "To: %x-%x-%x-%x-%x-%x From: %x-%x-%x-%x-%x-%x Type:%x%x\n",\
[esi+0]:2,[esi+1]:2,[esi+2]:2,[esi+3]:2,[esi+4]:2,[esi+5]:2,[esi+6]:2,[esi+7]:2,[esi+8]:2,[esi+9]:2,[esi+10]:2,[esi+11]:2,[esi+13]:2,[esi+12]:2
cmp ecx, ETH_FRAME_LEN
ja .err ; packet is too long
cmp ecx, ETH_ZLEN
jb .err ; packet is too short
movzx edi, [device.tx_start]
shl edi, 8
push cx
call PIO_write
pop cx
set_io 0
; set_io P0_COMMAND
mov al, CMD_PS0 + CMD_RD2 + CMD_STA
out dx, al
set_io P0_TPSR
mov al, [device.tx_start]
out dx, al
set_io P0_TBCR0
mov al, cl
out dx, al
set_io P0_TBCR1
mov al, ch
out dx, al
set_io P0_COMMAND
mov al, CMD_PS0 + CMD_TXP + CMD_RD2 + CMD_STA
out dx, al
DEBUGF 1, "Packet Sent!\n"
inc [device.packets_tx]
mov eax, [esp + 8] ; Get packet size in eax
add dword [device.bytes_tx], eax
adc dword [device.bytes_tx + 4], 0
stdcall KernelFree, [esp+4]
xor eax, eax
ret 8
.err:
DEBUGF 2, "Transmit error!\n"
stdcall KernelFree, [esp+4]
or eax, -1
ret 8
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;
; Interrupt handler
;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
align 4
int_handler:
push ebx esi edi
DEBUGF 1, "INT\n"
; find pointer of device wich made INT occur
mov ecx, [devices]
test ecx, ecx
jz .nothing
mov esi, device_list
.nextdevice:
mov ebx, [esi]
set_io 0
; set_io P0_COMMAND
mov al, CMD_PS0
out dx, al
set_io P0_ISR
in al, dx
test al, al
jnz .got_it
.continue:
add esi, 4
dec ecx
jnz .nextdevice
.nothing:
pop edi esi ebx
xor eax, eax
ret
.got_it:
DEBUGF 1, "Device=%x status=%x\n", ebx, eax:2
push ebx
test al, ISR_PRX ; packet received ok ?
jz .no_rx
test [device.flags], FLAG_PIO
jz .no_rx ; FIXME: Only PIO mode supported for now
;
pushd .no_rx
; allocate a buffer
stdcall KernelAlloc, ETH_FRAME_LEN
test eax, eax
jz .fail_2
pushd 0
push eax
; read offset for current packet from device
set_io 0
set_io P0_BOUND ; boundary ptr is offset to next packet we need to read.
in al, dx
inc al
cmp al, [device.memsize]
jb @f
mov al, [device.rx_start]
@@:
mov ch, al
set_io P0_COMMAND
mov al, CMD_PS1
out dx, al
set_io P1_CURR
in al, dx ; get current page in cl
mov cl, al
set_io P1_COMMAND
mov al, CMD_PS0
out dx, al
cmp cl, [device.memsize]
jb @f
mov cl, [device.rx_start]
@@:
cmp cl, ch
je .fail
movzx esi, ch ; we are using 256 byte pages
shl esi, 8 ; esi now holds the offset for current packet
; Get packet header in eax
sub esp, 4 ; reserve 4 bytes on stack to put packet header in
mov edi, esp
mov cx, 4
call PIO_read
mov ecx, [esp] ; ecx now contains packet header
; check if packet is ok
test ecx, RSTAT_PRX
jz .fail_3
; calculate packet length in ecx
shr ecx, 16
sub ecx, 4 ; CRC doesnt count as data byte
mov [esp + 4 + 4], ecx
; check if packet size is ok
cmp ecx, ETH_ZLEN
jb .fail_3
cmp ecx, ETH_FRAME_LEN
ja .fail_3
; update stats
DEBUGF 1, "Received %u bytes\n", ecx
add dword[device.bytes_rx], ecx
adc dword[device.bytes_rx + 4], 0
inc [device.packets_rx]
; update read and write pointers
add esi, 4
mov edi, [esp + 4]
; now check if we can read all data at once (if we cross the end boundary, we need to wrap back to the beginning)
xor eax, eax
mov ah, [device.memsize]
sub eax, esi
cmp ecx, eax ; eax = number of bytes till end of buffer, ecx = bytes we need to read
jbe .no_wrap
; Read first part
sub ecx, eax
push ecx
mov ecx, eax
call PIO_read ; Read the data
; update pointers
add edi, ecx
pop ecx
movzx esi, [device.rx_start]
shl esi, 8
; now read second part (or only part)
.no_wrap:
call PIO_read ; Read the data
; update boundary pointer
pop eax
mov al, ah
cmp al, [device.rx_start]
jne @f
mov al, [device.memsize]
@@:
set_io 0
set_io P0_BOUND
dec al
out dx, al
; now send the data to the kernel
jmp Eth_input
.fail_3:
add esp, 4
.fail:
add esp, 8
.fail_2:
.no_rx:
pop ebx
DEBUGF 1, "done\n"
set_io 0
set_io P0_ISR
mov al, 0xff
out dx, al
pop edi esi ebx
ret
;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Write MAC address ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;
align 4
write_mac: ; in: mac on stack (6 bytes)
DEBUGF 1, "Writing MAC\n"
set_io 0
mov al, CMD_PS1; + CMD_RD2 + CMD_STP
out dx, al
set_io P1_PAR0
mov esi, esp
mov cx, 6
@@:
lodsb
out dx, al
inc dx
loopw @r
add esp, 6
; Notice this procedure does not ret, but continues to read_mac instead.
;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Read MAC address ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;
read_mac:
DEBUGF 1, "Reading MAC\n"
xor esi, esi
mov cx, 16
sub esp, 16
mov edi, esp
call PIO_read
mov esi, esp
add esp, 16
lea edi, [device.mac]
mov ecx, 6
.loop:
movsb
test [device.flags], FLAG_16BIT
jz .8bit
inc esi
.8bit:
loop .loop
DEBUGF 1, "MAC=%x-%x-%x-%x-%x-%x\n",\
[device.mac]:2,[device.mac+1]:2,[device.mac+2]:2,[device.mac+3]:2,[device.mac+4]:2,[device.mac+5]:2
ret
;***************************************************************************
;
; PIO_read
;
; Description
; Read a frame from the ethernet card via Programmed I/O
; src in si
; cnt in cx
; dst in edi
;***************************************************************************
PIO_read:
DEBUGF 1, "PIO Read from %x to %x, %u bytes ", si, edi, cx
; start DMA
set_io 0
; set_io P0_COMMAND
mov al, CMD_RD2 + CMD_STA
out dx, al
; set length of data we're interested in
set_io P0_RBCR0
mov al, cl
out dx, al
set_io P0_RBCR1
mov al, ch
out dx, al
; set offset of what we want to read
set_io P0_RSAR0
mov ax, si
out dx, al
set_io P0_RSAR1
shr ax, 8
out dx, al
; start DMA read
set_io P0_COMMAND
mov al, CMD_RD0 + CMD_STA
out dx, al
set_io NE_ASIC
test [device.flags], FLAG_16BIT
jz .8bits
DEBUGF 1, "(16-bit mode)\n"
shr cx, 1 ; note that if the number was odd, carry flag will be set
pushf
.16bits:
in ax, dx
stosw
loopw .16bits
inc cx
popf
jnc .done
jmp .8bits_
.8bits:
DEBUGF 1, "(8-bit mode)\n"
.8bits_:
in al, dx
stosb
loopw .8bits_
.done:
; set_io 0
; set_io P0_ISR
;
; .dmawait: ; Wait for Remote DMA Complete
; in al, dx
; test al, ISR_RDC
; jz .dmawait
; and al, not ISR_RDC
; out dx, al ; clear the bit
ret
;***************************************************************************
;
; PIO_write
;
; Description
; writes a frame to the ethernet card via Programmed I/O
; dst in di
; cnt in cx
; src in esi
;***************************************************************************
PIO_write:
DEBUGF 1, "Eth PIO Write from %x to %x, %u bytes ", esi, di, cx
set_io 0
; set_io P0_COMMAND
mov al, CMD_RD2 + CMD_STA
out dx, al
set_io P0_ISR
mov al, ISR_RDC
out dx, al
set_io P0_RBCR0
mov al, cl
out dx, al
set_io P0_RBCR1
mov al, ch
out dx, al
mov ax, di
set_io P0_RSAR0
out dx, al
shr ax, 8
set_io P0_RSAR1
out dx, al
set_io P0_COMMAND
mov al, CMD_RD1 + CMD_STA
out dx, al
set_io NE_ASIC
test [device.flags], FLAG_16BIT
jz .8_bit
DEBUGF 1, "(16-bit mode)\n"
shr cx, 1 ; note that if the number was odd, carry flag will be set
pushf ; save the flags for later
.16bit:
lodsw
out dx, ax
loopw .16bit
popf
jnc .done
inc cx
jmp .8_bit_
.8_bit:
DEBUGF 1, "(8-bit mode)\n"
.8_bit_:
lodsb
out dx, al
loopw .8_bit_
.done:
; set_io 0
; set_io P0_ISR
; .dmawait: ; Wait for Remote DMA Complete
; in al, dx
; test al, ISR_RDC
; jz .dmawait
; and al, not ISR_RDC
; out dx, al ; clear the bit
ret
; place all initialized data here
align 4
devices dd 0
version dd (DRIVER_VERSION shl 16) or (API_VERSION and 0xFFFF)
my_service db 'RTL8029',0 ; max 16 chars include zero
;device_1 db 'Realtek 8029',0
;device_2 db 'Realtek 8019',0
;device_3 db 'Realtek 8019AS',0
;device_4 db 'ne2000',0
;device_5 db 'DP8390',0
include_debug_strings
section '.data' data readable writable align 16
; place all uninitialized data here
device_list rd MAX_DEVICES
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