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kolibrios/kernel/branches/net/drivers/R6040.asm
hidnplayr 4638ba887e Updated R6040 driver for net branch: 
Fixed typo, cleaned up, disabled excessive debug output.

git-svn-id: svn://kolibrios.org@1893 a494cfbc-eb01-0410-851d-a64ba20cac60
2011-02-28 19:20:47 +00:00

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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2011. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;; R6040 driver for KolibriOS ;;
;; ;;
;; based on R6040.c from linux ;;
;; ;;
;; Written by Asper (asper.85@mail.ru) ;;
;; and hidnplayr (hidnplayr@gmail.com) ;;
;; ;;
;; GNU GENERAL PUBLIC LICENSE ;;
;; Version 2, June 1991 ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
format MS COFF
API_VERSION equ 0x01000100
DRIVER_VERSION equ 5
MAX_DEVICES equ 16
DEBUG equ 1
__DEBUG__ equ 1
__DEBUG_LEVEL__ equ 2
W_MAX_TIMEOUT equ 0x0FFF ; max time out delay time
TX_TIMEOUT equ 6000 ; Time before concluding the transmitter is hung, in ms
TX_RING_SIZE equ 4 ; RING sizes must be a power of 2
RX_RING_SIZE equ 4
RX_BUF_LEN_IDX equ 3 ; 0==8K, 1==16K, 2==32K, 3==64K
; Threshold is bytes transferred to chip before transmission starts.
TX_FIFO_THRESH equ 256 ; In bytes, rounded down to 32 byte units.
; The following settings are log_2(bytes)-4: 0 == 16 bytes .. 6==1024.
RX_FIFO_THRESH equ 4 ; Rx buffer level before first PCI xfer.
RX_DMA_BURST equ 4 ; Maximum PCI burst, '4' is 256 bytes
TX_DMA_BURST equ 4
include 'proc32.inc'
include 'imports.inc'
include 'fdo.inc'
include 'netdrv.inc'
public START
public service_proc
public version
; Operational parameters that usually are not changed.
PHY1_ADDR equ 1 ;For MAC1
PHY2_ADDR equ 3 ;For MAC2
PHY_MODE equ 0x3100 ;PHY CHIP Register 0
PHY_CAP equ 0x01E1 ;PHY CHIP Register 4
;**************************************************************************
; RDC R6040 Register Definitions
;**************************************************************************
MCR0 equ 0x00 ;Control register 0
MCR1 equ 0x01 ;Control register 1
MAC_RST equ 0x0001 ;Reset the MAC
MBCR equ 0x08 ;Bus control
MT_ICR equ 0x0C ;TX interrupt control
MR_ICR equ 0x10 ;RX interrupt control
MTPR equ 0x14 ;TX poll command register
MR_BSR equ 0x18 ;RX buffer size
MR_DCR equ 0x1A ;RX descriptor control
MLSR equ 0x1C ;Last status
MMDIO equ 0x20 ;MDIO control register
MDIO_WRITE equ 0x4000 ;MDIO write
MDIO_READ equ 0x2000 ;MDIO read
MMRD equ 0x24 ;MDIO read data register
MMWD equ 0x28 ;MDIO write data register
MTD_SA0 equ 0x2C ;TX descriptor start address 0
MTD_SA1 equ 0x30 ;TX descriptor start address 1
MRD_SA0 equ 0x34 ;RX descriptor start address 0
MRD_SA1 equ 0x38 ;RX descriptor start address 1
MISR equ 0x3C ;Status register
MIER equ 0x40 ;INT enable register
MSK_INT equ 0x0000 ;Mask off interrupts
RX_FINISH equ 0x0001 ;RX finished
RX_NO_DESC equ 0x0002 ;No RX descriptor available
RX_FIFO_FULL equ 0x0004 ;RX FIFO full
RX_EARLY equ 0x0008 ;RX early
TX_FINISH equ 0x0010 ;TX finished
TX_EARLY equ 0x0080 ;TX early
EVENT_OVRFL equ 0x0100 ;Event counter overflow
LINK_CHANGED equ 0x0200 ;PHY link changed
ME_CISR equ 0x44 ;Event counter INT status
ME_CIER equ 0x48 ;Event counter INT enable
MR_CNT equ 0x50 ;Successfully received packet counter
ME_CNT0 equ 0x52 ;Event counter 0
ME_CNT1 equ 0x54 ;Event counter 1
ME_CNT2 equ 0x56 ;Event counter 2
ME_CNT3 equ 0x58 ;Event counter 3
MT_CNT equ 0x5A ;Successfully transmit packet counter
ME_CNT4 equ 0x5C ;Event counter 4
MP_CNT equ 0x5E ;Pause frame counter register
MAR0 equ 0x60 ;Hash table 0
MAR1 equ 0x62 ;Hash table 1
MAR2 equ 0x64 ;Hash table 2
MAR3 equ 0x66 ;Hash table 3
MID_0L equ 0x68 ;Multicast address MID0 Low
MID_0M equ 0x6A ;Multicast address MID0 Medium
MID_0H equ 0x6C ;Multicast address MID0 High
MID_1L equ 0x70 ;MID1 Low
MID_1M equ 0x72 ;MID1 Medium
MID_1H equ 0x74 ;MID1 High
MID_2L equ 0x78 ;MID2 Low
MID_2M equ 0x7A ;MID2 Medium
MID_2H equ 0x7C ;MID2 High
MID_3L equ 0x80 ;MID3 Low
MID_3M equ 0x82 ;MID3 Medium
MID_3H equ 0x84 ;MID3 High
PHY_CC equ 0x88 ;PHY status change configuration register
PHY_ST equ 0x8A ;PHY status register
MAC_SM equ 0xAC ;MAC status machine
MAC_ID equ 0xBE ;Identifier register
MAX_BUF_SIZE equ 0x600 ;1536
MBCR_DEFAULT equ 0x012A ;MAC Bus Control Register
MCAST_MAX equ 3 ;Max number multicast addresses to filter
;Descriptor status
DSC_OWNER_MAC equ 0x8000 ;MAC is the owner of this descriptor
DSC_RX_OK equ 0x4000 ;RX was successfull
DSC_RX_ERR equ 0x0800 ;RX PHY error
DSC_RX_ERR_DRI equ 0x0400 ;RX dribble packet
DSC_RX_ERR_BUF equ 0x0200 ;RX length exceeds buffer size
DSC_RX_ERR_LONG equ 0x0100 ;RX length > maximum packet length
DSC_RX_ERR_RUNT equ 0x0080 ;RX packet length < 64 byte
DSC_RX_ERR_CRC equ 0x0040 ;RX CRC error
DSC_RX_BCAST equ 0x0020 ;RX broadcast (no error)
DSC_RX_MCAST equ 0x0010 ;RX multicast (no error)
DSC_RX_MCH_HIT equ 0x0008 ;RX multicast hit in hash table (no error)
DSC_RX_MIDH_HIT equ 0x0004 ;RX MID table hit (no error)
DSC_RX_IDX_MID_MASK equ 3 ;RX mask for the index of matched MIDx
;PHY settings
ICPLUS_PHY_ID equ 0x0243
RX_INTS equ RX_FIFO_FULL or RX_NO_DESC or RX_FINISH
TX_INTS equ TX_FINISH
INT_MASK equ RX_INTS or TX_INTS
RX_BUF_LEN equ (8192 << RX_BUF_LEN_IDX) ; Size of the in-memory receive ring.
IO_SIZE equ 256 ; RDC MAC I/O Size
MAX_MAC equ 2 ; MAX RDC MAC
virtual at 0
x_head:
.status dw ? ;0-1
.len dw ? ;2-3
.buf dd ? ;4-7
.ndesc dd ? ;8-B
.rev1 dd ? ;C-F
.vbufp dd ? ;10-13
.vndescp dd ? ;14-17
.skb_ptr dd ? ;18-1B
.rev2 dd ? ;1C-1F
.sizeof:
end virtual
virtual at ebx
device:
ETH_DEVICE
.io_addr dd ?
.cur_rx dw ?
.cur_tx dw ?
.last_tx dw ?
.phy_addr dw ?
.phy_mode dw ?
.mcr0 dw ?
.mcr1 dw ?
.switch_sig dw ?
.pci_bus db ?
.pci_dev db ?
.irq_line db ?
rb 1 ; dword alignment
.tx_ring: rb (((x_head.sizeof*TX_RING_SIZE)+32) and 0xfffffff0)
.rx_ring: rb (((x_head.sizeof*RX_RING_SIZE)+32) and 0xfffffff0)
.size = $ - device
end virtual
section '.flat' code readable align 16
;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; proc START ;;
;; ;;
;; (standard driver proc) ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;
align 4
proc START stdcall, state:dword
cmp [state], 1
jne .exit
.entry:
DEBUGF 2,"Loading R6040 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 esi, device_list
mov ecx, [devices]
test ecx, ecx
jz .firstdevice
; 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 ; Allocate the buffer for device structure
; 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], .fail
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
; Ok, the eth_device structure is ready, let's probe the device
cli
call probe ; this function will output in eax
test eax, eax
jnz .err_sti ; If an error occured, exit
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] ;
mov [device.type], NET_TYPE_ETH
call NetRegDev
sti
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
.err_sti:
sti
.err:
stdcall KernelFree, ebx
.fail:
or eax, -1
ret
;------------------------------------------------------
endp
;;/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\;;
;; ;;
;; Actual Hardware dependent code starts here ;;
;; ;;
;;/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\;;
macro mdio_write reg, val {
stdcall phy_read, [device.io_addr], [device.phy_addr], reg
}
macro mdio_write reg, val {
stdcall phy_write, [device.io_addr], [devce.phy_addr], reg, val
}
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 RTL8139)
;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
align 4
probe:
DEBUGF 2,"Probing R6040 device\n"
make_bus_master [device.pci_bus], [device.pci_dev]
; If PHY status change register is still set to zero
; it means the bootloader didn't initialize it
set_io 0
set_io PHY_CC
in ax, dx
test ax, ax
jnz @f
mov ax, 0x9F07
out dx, ax
@@:
call read_mac
; Some bootloaders/BIOSes do not initialize MAC address, warn about that
and eax, 0xFF
or eax, dword [device.mac]
test eax, eax
jnz @f
DEBUGF 2, "ERROR: MAC address not initialized!\n"
@@:
; Init RDC private data
mov [device.mcr0], 0x1002
;mov [private.phy_addr], 1 ; Asper: Only one network card is supported now.
mov [device.switch_sig], 0
; Check the vendor ID on the PHY, if 0xFFFF assume none attached
stdcall phy_read, 1, 2
cmp ax, 0xFFFF
jne @f
DEBUGF 2, "Failed to detect an attached PHY\n" ;, generating random"
mov eax, -1
ret
@@:
; Set MAC address
call init_mac_regs
; Initialize and alloc RX/TX buffers
call init_txbufs
call init_rxbufs
; Read the PHY ID
mov [device.phy_mode], 0x8000
stdcall phy_read, 0, 2
mov [device.switch_sig], ax
cmp ax, ICPLUS_PHY_ID
jne @f
stdcall phy_write, 29, 31, 0x175C ; Enable registers
jmp .phy_readen
@@:
; PHY Mode Check
movzx eax, [device.phy_addr]
stdcall phy_write, eax, 4, PHY_CAP
stdcall phy_write, eax, 0, PHY_MODE
if PHY_MODE = 0x3100
call phy_mode_chk
mov [device.phy_mode], ax
jmp .phy_readen
end if
if not (PHY_MODE and 0x0100)
mov [device.phy_mode], 0
end if
.phy_readen:
; Set duplex mode
mov ax, [device.phy_mode]
or [device.mcr0], ax
; improve performance (by RDC guys)
stdcall phy_read, 30, 17
or ax, 0x4000
stdcall phy_write, 30, 17, eax
stdcall phy_read, 30, 17
and ax, not 0x2000
stdcall phy_write, 30, 17, eax
stdcall phy_write, 0, 19, 0x0000
stdcall phy_write, 0, 30, 0x01F0
; Initialize all Mac registers
call init_mac_regs
align 4
reset:
DEBUGF 2,"Resetting R6040\n"
; Mask off Interrupt
xor ax, ax
set_io 0
set_io MIER
out dx, ax
; attach int handler
movzx eax, [device.irq_line]
DEBUGF 2,"Attaching int handler to irq %x\n", eax:1
stdcall AttachIntHandler, eax, int_handler, dword 0
test eax, eax
jnz @f
DEBUGF 2,"\nCould not attach int handler!\n"
; or eax, -1
; ret
@@:
;Reset RDC MAC
mov eax, MAC_RST
set_io 0
set_io MCR1
out dx, ax
mov ecx, 2048 ;limit
.read:
in ax, dx
test ax, 0x1
jnz @f
dec ecx
test ecx, ecx
jnz .read
@@:
;Reset internal state machine
mov ax, 2
set_io MAC_SM
out dx, ax
xor ax, ax
out dx, ax
mov esi, 5
stdcall Sleep
;MAC Bus Control Register
mov ax, MBCR_DEFAULT
set_io 0
set_io MBCR
out dx, ax
;Buffer Size Register
mov ax, MAX_BUF_SIZE
set_io MR_BSR
out dx, ax
;Write TX ring start address
lea eax, [device.tx_ring]
GetRealAddr
set_io MTD_SA0
out dx, ax
shr eax, 16
set_io MTD_SA1
out dx, ax
;Write RX ring start address
lea eax, [device.rx_ring]
GetRealAddr
set_io MRD_SA0
out dx, ax
shr eax, 16
set_io MRD_SA1
out dx, ax
;Set interrupt waiting time and packet numbers
xor ax, ax
set_io MT_ICR
out dx, ax
;Enable interrupts
mov ax, INT_MASK
set_io MIER
out dx, ax
;Enable TX and RX
mov ax, [device.mcr0]
or ax, 0x0002
set_io 0
out dx, ax
;Let TX poll the descriptors
;we may got called by tx_timeout which has left
;some unset tx buffers
xor ax, ax
inc ax
set_io 0
set_io MTPR
out dx, ax
; Set the mtu, kernel will be able to send now
mov [device.mtu], 1514
DEBUGF 1,"Reset ok\n"
xor eax, eax
ret
align 4
init_txbufs:
DEBUGF 1,"Init TxBufs\n"
lea esi, [device.tx_ring]
lea eax, [device.tx_ring + x_head.sizeof]
GetRealAddr
mov ecx, TX_RING_SIZE
.next_desc:
mov [esi + x_head.ndesc], eax
mov [esi + x_head.skb_ptr], 0
mov [esi + x_head.status], DSC_OWNER_MAC
add eax, x_head.sizeof
add esi, x_head.sizeof
dec ecx
jnz .next_desc
lea eax, [device.tx_ring]
GetRealAddr
mov [device.tx_ring + x_head.sizeof*(TX_RING_SIZE - 1) + x_head.ndesc], eax
ret
align 4
init_rxbufs:
DEBUGF 1,"Init RxBufs\n"
lea esi, [device.rx_ring]
lea eax, [device.rx_ring + x_head.sizeof]
GetRealAddr
mov edx, eax
mov ecx, RX_RING_SIZE
.next_desc:
mov [esi + x_head.ndesc], edx
push esi ecx
stdcall KernelAlloc, MAX_BUF_SIZE
pop ecx esi
mov [esi + x_head.skb_ptr], eax
GetRealAddr
mov [esi + x_head.buf], eax
mov [esi + x_head.status], DSC_OWNER_MAC
add edx, x_head.sizeof
add esi, x_head.sizeof
dec ecx
jnz .next_desc
; complete the ring by linking the last to the first
lea eax, [device.rx_ring]
GetRealAddr
mov [device.rx_ring + x_head.sizeof*(RX_RING_SIZE - 1) + x_head.ndesc], eax
ret
align 4
phy_mode_chk:
DEBUGF 1,"Checking PHY mode\n"
; PHY Link Status Check
movzx eax, [device.phy_addr]
stdcall phy_read, eax, 1
test eax, 0x4
jz .ret_0x8000
; PHY Chip Auto-Negotiation Status
movzx eax, [device.phy_addr]
stdcall phy_read, eax, 1
test eax, 0x0020
jnz .auto_nego
; Force Mode
movzx eax, [device.phy_addr]
stdcall phy_read, eax, 0
test eax, 0x100
jnz .ret_0x8000
.auto_nego:
; Auto Negotiation Mode
movzx eax, [device.phy_addr]
stdcall phy_read, eax, 5
mov ecx, eax
movzx eax, [device.phy_addr]
stdcall phy_read, eax, 4
and eax, ecx
test eax, 0x140
jnz .ret_0x8000
xor eax, eax
ret
.ret_0x8000:
mov eax, 0x8000
ret
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Transmit ;;
;; ;;
;; In: buffer pointer in [esp+4] ;;
;; size of buffer in [esp+8] ;;
;; pointer to device structure in ebx ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
align 4
transmit:
DEBUGF 2,"\nTransmitting packet, buffer:%x, size:%u\n", [esp+4], [esp+8]
mov eax, [esp+4]
DEBUGF 2,"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 .fail
cmp dword [esp+8], 60
jl .fail
movzx edi, [device.cur_tx]
shl edi, 5
add edi, ebx
add edi, device.tx_ring - ebx
DEBUGF 2,"TX buffer status: 0x%x\n", [edi + x_head.status]:4
test [edi + x_head.status], DSC_OWNER_MAC ; check if buffer is available
jnz .wait_to_send
.do_send:
DEBUGF 2,"Sending now\n"
mov eax, [esp+4]
mov [edi + x_head.skb_ptr], eax
GetRealAddr
mov [edi + x_head.buf], eax
mov ecx, [esp+8]
mov [edi + x_head.len], cx
mov [edi + x_head.status], DSC_OWNER_MAC
; Trigger the MAC to check the TX descriptor
mov ax, 0x01
set_io 0
set_io MTPR
out dx, ax
inc [device.cur_tx]
and [device.cur_tx], TX_RING_SIZE - 1
xor eax, eax
ret 8
.wait_to_send:
DEBUGF 2,"Waiting for TX buffer\n"
call GetTimerTicks ; returns in eax
lea edx, [eax + 100]
.l2:
test [edi + x_head.status], DSC_OWNER_MAC
jz .do_send
mov esi, 10
call Sleep
call GetTimerTicks
cmp edx, eax
jl .l2
DEBUGF 1,"Send timeout\n"
xor eax, eax
dec eax
.fail:
DEBUGF 1,"Send failed\n"
ret 8
;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Interrupt handler ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;
align 4
int_handler:
DEBUGF 2,"\nIRQ %x ", eax:2 ; no, you cant replace 'eax:2' with 'al', this must be a bug in FDO
; Find pointer of device wich made IRQ occur
mov esi, device_list
mov ecx, [devices]
test ecx, ecx
jz .fail
.nextdevice:
mov ebx, dword [esi]
; Find reason for IRQ
set_io 0
set_io MISR
in ax, dx
out dx, ax ; send it back to ACK
DEBUGF 2,"MISR=%x\n", eax:4
; Check if we are interessed in some of the reasons
test ax, INT_MASK
jnz .got_it
; If not, try next device
add esi, 4
dec ecx
jnz .nextdevice
.fail: ; If no device was found, abort (The irq was probably for a device, not registered to this driver)
ret
; At this point, test for all possible reasons, and handle accordingly
.got_it:
push ax
test word [esp], RX_FINISH
jz .no_RX
push ebx
.more_RX:
pop ebx
; Find the current RX descriptor
movzx edx, [device.cur_rx]
shl edx, 5
lea edx, [device.rx_ring + edx]
; Check the descriptor status
mov cx, [edx + x_head.status]
test cx, DSC_OWNER_MAC
jnz .no_RX
DEBUGF 2,"packet status=0x%x\n", cx
test cx, DSC_RX_ERR ; Global error status set
jnz .no_RX
; Packet successfully received
movzx ecx, [edx + x_head.len]
and ecx, 0xFFF
sub ecx, 4 ; Do not count the CRC
; Push packet size and pointer, kernel will need it..
push ebx
push .more_RX
push ecx
push [edx + x_head.skb_ptr]
DEBUGF 2,"packet ptr=0x%x\n", [edx + x_head.skb_ptr]
; reset the RX descriptor
push edx
stdcall KernelAlloc, MAX_BUF_SIZE
pop edx
mov [edx + x_head.skb_ptr], eax
GetRealAddr
mov [edx + x_head.buf], eax
mov [edx + x_head.status], DSC_OWNER_MAC
; Use next descriptor next time
inc [device.cur_rx]
and [device.cur_rx], RX_RING_SIZE - 1
; At last, send packet to kernel
jmp EthReceiver
.no_RX:
test word [esp], TX_FINISH
jz .no_TX
.loop_tx:
movzx edi, [device.last_tx]
shl edi, 5
lea edi, [device.tx_ring + edi]
test [edi + x_head.status], DSC_OWNER_MAC
jnz .no_TX
cmp [edi + x_head.skb_ptr], 0
je .no_TX
DEBUGF 2,"Freeing buffer 0x%x\n", [edi + x_head.skb_ptr]
push [edi + x_head.skb_ptr]
mov [edi + x_head.skb_ptr], 0
call KernelFree
inc [device.last_tx]
and [device.last_tx], TX_RING_SIZE - 1
jmp .loop_tx
.no_TX:
pop ax
ret
align 4
init_mac_regs:
DEBUGF 2,"initializing MAC regs\n"
; MAC operation register
mov ax, 1
set_io 0
set_io MCR1
out dx, ax
; Reset MAC
mov ax, 2
set_io MAC_SM
out dx, ax
; Reset internal state machine
xor ax, ax
out dx, ax
mov esi, 5
stdcall Sleep
call read_mac
ret
; Read a word data from PHY Chip
align 4
proc phy_read stdcall, phy_addr:dword, reg:dword
DEBUGF 2,"PHY read, addr=0x%x reg=0x%x\n", [phy_addr]:8, [reg]:8
mov eax, [phy_addr]
shl eax, 8
add eax, [reg]
add eax, MDIO_READ
set_io 0
set_io MMDIO
out dx, ax
;Wait for the read bit to be cleared.
mov ecx, 2048 ;limit
.read:
in ax, dx
test ax, MDIO_READ
jz @f
dec ecx
jnz .read
@@:
set_io MMRD
in ax, dx
and eax, 0xFFFF
DEBUGF 2,"PHY read, val=0x%x\n", eax:4
ret
endp
; Write a word data to PHY Chip
align 4
proc phy_write stdcall, phy_addr:dword, reg:dword, val:dword
DEBUGF 2,"PHY write, addr=0x%x reg=0x%x val=0x%x\n", [phy_addr]:8, [reg]:8, [val]:8
mov eax, [val]
set_io 0
set_io MMWD
out dx, ax
;Write the command to the MDIO bus
mov eax, [phy_addr]
shl eax, 8
add eax, [reg]
add eax, MDIO_WRITE
set_io MMDIO
out dx, ax
;Wait for the write bit to be cleared.
mov ecx, 2048 ;limit
.write:
in ax, dx
test ax, MDIO_WRITE
jz @f
dec ecx
jnz .write
@@:
DEBUGF 2,"PHY write ok\n"
ret
endp
align 4
read_mac:
DEBUGF 2,"Reading MAC: "
mov cx, 3
lea edi, [device.mac]
set_io 0
set_io MID_0L
.mac:
in ax, dx
stosw
inc dx
inc dx
dec cx
jnz .mac
DEBUGF 2,"%x-%x-%x-%x-%x-%x\n",[edi-6]:2, [edi-5]:2, [edi-4]:2, [edi-3]:2, [edi-2]:2, [edi-1]:2
ret
; End of code
section '.data' data readable writable align 16 ; place all uninitialized data place here
align 4 ; Place all initialised data here
devices dd 0
version dd (DRIVER_VERSION shl 16) or (API_VERSION and 0xFFFF)
my_service db 'R6040',0 ; max 16 chars include zero
include_debug_strings ; All data wich FDO uses will be included here
device_list rd MAX_DEVICES ; This list contains all pointers to device structures the driver is handling
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