;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2014. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;; i8254x driver for KolibriOS ;;
;; ;;
;; based on i8254x.asm from baremetal os ;;
;; ;;
;; Written by hidnplayr (hidnplayr@gmail.com) ;;
;; ;;
;; GNU GENERAL PUBLIC LICENSE ;;
;; Version 2, June 1991 ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; TODO: make better use of the available descriptors
format MS COFF
API_VERSION = 0x01000100
DRIVER_VERSION = 5
MAX_DEVICES = 16
DEBUG = 1
__DEBUG__ = 1
__DEBUG_LEVEL__ = 2 ; 1 = verbose, 2 = errors only
MAX_PKT_SIZE = 16384 ; Maximum packet size
include '../struct.inc'
include '../macros.inc'
include '../proc32.inc'
include '../imports.inc'
include '../fdo.inc'
include '../netdrv.inc'
public START
public service_proc
public version
; Register list
REG_CTRL = 0x0000 ; Control Register
REG_STATUS = 0x0008 ; Device Status Register
REG_CTRLEXT = 0x0018 ; Extended Control Register
REG_MDIC = 0x0020 ; MDI Control Register
REG_FCAL = 0x0028 ; Flow Control Address Low
REG_FCAH = 0x002C ; Flow Control Address High
REG_FCT = 0x0030 ; Flow Control Type
REG_VET = 0x0038 ; VLAN Ether Type
REG_ICR = 0x00C0 ; Interrupt Cause Read
REG_ITR = 0x00C4 ; Interrupt Throttling Register
REG_ICS = 0x00C8 ; Interrupt Cause Set Register
REG_IMS = 0x00D0 ; Interrupt Mask Set/Read Register
REG_IMC = 0x00D8 ; Interrupt Mask Clear Register
REG_RCTL = 0x0100 ; Receive Control Register
REG_FCTTV = 0x0170 ; Flow Control Transmit Timer Value
REG_TXCW = 0x0178 ; Transmit Configuration Word
REG_RXCW = 0x0180 ; Receive Configuration Word
REG_TCTL = 0x0400 ; Transmit Control Register
REG_TIPG = 0x0410 ; Transmit Inter Packet Gap
REG_LEDCTL = 0x0E00 ; LED Control
REG_PBA = 0x1000 ; Packet Buffer Allocation
REG_RDBAL = 0x2800 ; RX Descriptor Base Address Low
REG_RDBAH = 0x2804 ; RX Descriptor Base Address High
REG_RDLEN = 0x2808 ; RX Descriptor Length
REG_RDH = 0x2810 ; RX Descriptor Head
REG_RDT = 0x2818 ; RX Descriptor Tail
REG_RDTR = 0x2820 ; RX Delay Timer Register
REG_RXDCTL = 0x3828 ; RX Descriptor Control
REG_RADV = 0x282C ; RX Int. Absolute Delay Timer
REG_RSRPD = 0x2C00 ; RX Small Packet Detect Interrupt
REG_TXDMAC = 0x3000 ; TX DMA Control
REG_TDBAL = 0x3800 ; TX Descriptor Base Address Low
REG_TDBAH = 0x3804 ; TX Descriptor Base Address High
REG_TDLEN = 0x3808 ; TX Descriptor Length
REG_TDH = 0x3810 ; TX Descriptor Head
REG_TDT = 0x3818 ; TX Descriptor Tail
REG_TIDV = 0x3820 ; TX Interrupt Delay Value
REG_TXDCTL = 0x3828 ; TX Descriptor Control
REG_TADV = 0x382C ; TX Absolute Interrupt Delay Value
REG_TSPMT = 0x3830 ; TCP Segmentation Pad & Min Threshold
REG_RXCSUM = 0x5000 ; RX Checksum Control
; Register list for i8254x
I82542_REG_RDTR = 0x0108 ; RX Delay Timer Register
I82542_REG_RDBAL = 0x0110 ; RX Descriptor Base Address Low
I82542_REG_RDBAH = 0x0114 ; RX Descriptor Base Address High
I82542_REG_RDLEN = 0x0118 ; RX Descriptor Length
I82542_REG_RDH = 0x0120 ; RDH for i82542
I82542_REG_RDT = 0x0128 ; RDT for i82542
I82542_REG_TDBAL = 0x0420 ; TX Descriptor Base Address Low
I82542_REG_TDBAH = 0x0424 ; TX Descriptor Base Address Low
I82542_REG_TDLEN = 0x0428 ; TX Descriptor Length
I82542_REG_TDH = 0x0430 ; TDH for i82542
I82542_REG_TDT = 0x0438 ; TDT for i82542
; CTRL - Control Register (0x0000)
CTRL_FD = 0x00000001 ; Full Duplex
CTRL_LRST = 0x00000008 ; Link Reset
CTRL_ASDE = 0x00000020 ; Auto-speed detection
CTRL_SLU = 0x00000040 ; Set Link Up
CTRL_ILOS = 0x00000080 ; Invert Loss of Signal
CTRL_SPEED_MASK = 0x00000300 ; Speed selection
CTRL_SPEED_SHIFT = 8
CTRL_FRCSPD = 0x00000800 ; Force Speed
CTRL_FRCDPLX = 0x00001000 ; Force Duplex
CTRL_SDP0_DATA = 0x00040000 ; SDP0 data
CTRL_SDP1_DATA = 0x00080000 ; SDP1 data
CTRL_SDP0_IODIR = 0x00400000 ; SDP0 direction
CTRL_SDP1_IODIR = 0x00800000 ; SDP1 direction
CTRL_RST = 0x04000000 ; Device Reset
CTRL_RFCE = 0x08000000 ; RX Flow Ctrl Enable
CTRL_TFCE = 0x10000000 ; TX Flow Ctrl Enable
CTRL_VME = 0x40000000 ; VLAN Mode Enable
CTRL_PHY_RST = 0x80000000 ; PHY reset
; STATUS - Device Status Register (0x0008)
STATUS_FD = 0x00000001 ; Full Duplex
STATUS_LU = 0x00000002 ; Link Up
STATUS_TXOFF = 0x00000010 ; Transmit paused
STATUS_TBIMODE = 0x00000020 ; TBI Mode
STATUS_SPEED_MASK = 0x000000C0 ; Link Speed setting
STATUS_SPEED_SHIFT = 6
STATUS_ASDV_MASK = 0x00000300 ; Auto Speed Detection
STATUS_ASDV_SHIFT = 8
STATUS_PCI66 = 0x00000800 ; PCI bus speed
STATUS_BUS64 = 0x00001000 ; PCI bus width
STATUS_PCIX_MODE = 0x00002000 ; PCI-X mode
STATUS_PCIXSPD_MASK = 0x0000C000 ; PCI-X speed
STATUS_PCIXSPD_SHIFT = 14
; CTRL_EXT - Extended Device Control Register (0x0018)
CTRLEXT_PHY_INT = 0x00000020 ; PHY interrupt
CTRLEXT_SDP6_DATA = 0x00000040 ; SDP6 data
CTRLEXT_SDP7_DATA = 0x00000080 ; SDP7 data
CTRLEXT_SDP6_IODIR = 0x00000400 ; SDP6 direction
CTRLEXT_SDP7_IODIR = 0x00000800 ; SDP7 direction
CTRLEXT_ASDCHK = 0x00001000 ; Auto-Speed Detect Chk
CTRLEXT_EE_RST = 0x00002000 ; EEPROM reset
CTRLEXT_SPD_BYPS = 0x00008000 ; Speed Select Bypass
CTRLEXT_RO_DIS = 0x00020000 ; Relaxed Ordering Dis.
CTRLEXT_LNKMOD_MASK = 0x00C00000 ; Link Mode
CTRLEXT_LNKMOD_SHIFT = 22
; MDIC - MDI Control Register (0x0020)
MDIC_DATA_MASK = 0x0000FFFF ; Data
MDIC_REG_MASK = 0x001F0000 ; PHY Register
MDIC_REG_SHIFT = 16
MDIC_PHY_MASK = 0x03E00000 ; PHY Address
MDIC_PHY_SHIFT = 21
MDIC_OP_MASK = 0x0C000000 ; Opcode
MDIC_OP_SHIFT = 26
MDIC_R = 0x10000000 ; Ready
MDIC_I = 0x20000000 ; Interrupt Enable
MDIC_E = 0x40000000 ; Error
; ICR - Interrupt Cause Read (0x00c0)
ICR_TXDW = 0x00000001 ; TX Desc Written back
ICR_TXQE = 0x00000002 ; TX Queue Empty
ICR_LSC = 0x00000004 ; Link Status Change
ICR_RXSEQ = 0x00000008 ; RX Sence Error
ICR_RXDMT0 = 0x00000010 ; RX Desc min threshold reached
ICR_RXO = 0x00000040 ; RX Overrun
ICR_RXT0 = 0x00000080 ; RX Timer Interrupt
ICR_MDAC = 0x00000200 ; MDIO Access Complete
ICR_RXCFG = 0x00000400
ICR_PHY_INT = 0x00001000 ; PHY Interrupt
ICR_GPI_SDP6 = 0x00002000 ; GPI on SDP6
ICR_GPI_SDP7 = 0x00004000 ; GPI on SDP7
ICR_TXD_LOW = 0x00008000 ; TX Desc low threshold hit
ICR_SRPD = 0x00010000 ; Small RX packet detected
; RCTL - Receive Control Register (0x0100)
RCTL_EN = 0x00000002 ; Receiver Enable
RCTL_SBP = 0x00000004 ; Store Bad Packets
RCTL_UPE = 0x00000008 ; Unicast Promiscuous Enabled
RCTL_MPE = 0x00000010 ; Xcast Promiscuous Enabled
RCTL_LPE = 0x00000020 ; Long Packet Reception Enable
RCTL_LBM_MASK = 0x000000C0 ; Loopback Mode
RCTL_LBM_SHIFT = 6
RCTL_RDMTS_MASK = 0x00000300 ; RX Desc Min Threshold Size
RCTL_RDMTS_SHIFT = 8
RCTL_MO_MASK = 0x00003000 ; Multicast Offset
RCTL_MO_SHIFT = 12
RCTL_BAM = 0x00008000 ; Broadcast Accept Mode
RCTL_BSIZE_MASK = 0x00030000 ; RX Buffer Size
RCTL_BSIZE_SHIFT = 16
RCTL_VFE = 0x00040000 ; VLAN Filter Enable
RCTL_CFIEN = 0x00080000 ; CFI Enable
RCTL_CFI = 0x00100000 ; Canonical Form Indicator Bit
RCTL_DPF = 0x00400000 ; Discard Pause Frames
RCTL_PMCF = 0x00800000 ; Pass MAC Control Frames
RCTL_BSEX = 0x02000000 ; Buffer Size Extension
RCTL_SECRC = 0x04000000 ; Strip Ethernet CRC
; TCTL - Transmit Control Register (0x0400)
TCTL_EN = 0x00000002 ; Transmit Enable
TCTL_PSP = 0x00000008 ; Pad short packets
TCTL_SWXOFF = 0x00400000 ; Software XOFF Transmission
; PBA - Packet Buffer Allocation (0x1000)
PBA_RXA_MASK = 0x0000FFFF ; RX Packet Buffer
PBA_RXA_SHIFT = 0
PBA_TXA_MASK = 0xFFFF0000 ; TX Packet Buffer
PBA_TXA_SHIFT = 16
; Flow Control Type
FCT_TYPE_DEFAULT = 0x8808
; === TX Descriptor fields ===
; TX Packet Length (word 2)
TXDESC_LEN_MASK = 0x0000ffff
; TX Descriptor CMD field (word 2)
TXDESC_IDE = 0x80000000 ; Interrupt Delay Enable
TXDESC_VLE = 0x40000000 ; VLAN Packet Enable
TXDESC_DEXT = 0x20000000 ; Extension
TXDESC_RPS = 0x10000000 ; Report Packet Sent
TXDESC_RS = 0x08000000 ; Report Status
TXDESC_IC = 0x04000000 ; Insert Checksum
TXDESC_IFCS = 0x02000000 ; Insert FCS
TXDESC_EOP = 0x01000000 ; End Of Packet
; TX Descriptor STA field (word 3)
TXDESC_TU = 0x00000008 ; Transmit Underrun
TXDESC_LC = 0x00000004 ; Late Collision
TXDESC_EC = 0x00000002 ; Excess Collisions
TXDESC_DD = 0x00000001 ; Descriptor Done
; === RX Descriptor fields ===
; RX Packet Length (word 2)
RXDESC_LEN_MASK = 0x0000ffff
; RX Descriptor STA field (word 3)
RXDESC_PIF = 0x00000080 ; Passed In-exact Filter
RXDESC_IPCS = 0x00000040 ; IP cksum calculated
RXDESC_TCPCS = 0x00000020 ; TCP cksum calculated
RXDESC_VP = 0x00000008 ; Packet is 802.1Q
RXDESC_IXSM = 0x00000004 ; Ignore cksum indication
RXDESC_EOP = 0x00000002 ; End Of Packet
RXDESC_DD = 0x00000001 ; Descriptor Done
virtual at ebx
device:
ETH_DEVICE
.mmio_addr dd ?
.pci_bus dd ?
.pci_dev dd ?
.irq_line db ?
.cur_tx dd ?
.last_tx dd ?
rb 0x100 - (($ - device) and 0xff)
.rx_desc rd 256/8
rb 0x100 - (($ - device) and 0xff)
.tx_desc rd 256/8
sizeof.device_struct = $ - 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 1,"Loading 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
jb .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
jb .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 al, byte [device.pci_bus]
jne .next
cmp ah, byte [device.pci_dev]
je .find_devicenum ; Device is already loaded, let's find it's device number
.next:
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
jae .fail
allocate_and_clear ebx, sizeof.device_struct, .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.unload], unload
mov [device.name], my_service
; save the pci bus and device numbers
mov eax, [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 mmio addres of the PCI device
PCI_find_mmio32
; Create virtual mapping of the physical memory
push 1Bh ; PG_SW+PG_NOCACHE
push 10000h ; size of the map
push eax
call MapIoMem
mov [device.mmio_addr], eax
; We've found the mmio address, find IRQ now
PCI_find_irq
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.mmio_addr]:8
; Ok, the eth_device structure is ready, let's probe the device
call probe ; this function will output in eax
test eax, eax
jnz .err ; 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] ;
call start_i8254x
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
.err:
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 (device_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 I8254X)
;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
align 4
probe:
DEBUGF 1,"Probe\n"
PCI_make_bus_master
; TODO: validate the device
call read_mac
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
@@:
reset_dontstart:
DEBUGF 1,"Reset\n"
mov esi, [device.mmio_addr]
or dword [esi + REG_CTRL], CTRL_RST ; reset device
.loop:
push esi
xor esi, esi
inc esi
call Sleep
pop esi
test dword [esi + REG_CTRL], CTRL_RST
jnz .loop
mov dword [esi + REG_IMC], 0xffffffff ; Disable all interrupt causes
mov eax, dword [esi + REG_ICR] ; Clear any pending interrupts
mov dword [esi + REG_ITR], 0 ; Disable interrupt throttling logic
mov dword [esi + REG_PBA], 0x00000030 ; PBA: set the RX buffer size to 48KB (TX buffer is calculated as 64-RX buffer)
mov dword [esi + REG_RDTR], 0 ; RDTR: set no delay
mov dword [esi + REG_TXCW], 0x08008060 ; TXCW: set ANE, TxConfigWord (Half/Full duplex, Next Page Reqest)
mov eax, [esi + REG_CTRL]
or eax, 1 shl 6 + 1 shl 5
and eax, not (1 shl 3 + 1 shl 7 + 1 shl 30 + 1 shl 31)
mov dword [esi + REG_CTRL], eax ; CTRL: clear LRST, set SLU and ASDE, clear RSTPHY, VME, and ILOS
lea edi, [esi + 0x5200] ; MTA: reset
mov eax, 0xffffffff
stosd
stosd
stosd
stosd
stdcall KernelAlloc, 48*1024
mov dword [device.rx_desc + 16], eax
GetRealAddr
mov dword [device.rx_desc], eax
mov dword [device.rx_desc + 4], 0
lea eax, [device.rx_desc]
GetRealAddr
mov dword [esi + REG_RDBAL], eax ; Receive Descriptor Base Address Low
mov dword [esi + REG_RDBAH], 0 ; Receive Descriptor Base Address High
mov dword [esi + REG_RDLEN], (1 * 128) ; Receive Descriptor Length
mov dword [esi + REG_RDH], 0 ; Receive Descriptor Head
mov dword [esi + REG_RDT], 1 ; Receive Descriptor Tail
mov dword [esi + REG_RCTL], RCTL_EN or RCTL_SBP or RCTL_BAM or RCTL_SECRC or RCTL_UPE or RCTL_MPE
; Receiver Enable, Store Bad Packets, Broadcast Accept Mode, Strip Ethernet CRC from incoming packet, Promiscuous mode
mov dword [device.tx_desc], 0
mov dword [device.tx_desc + 4], 0
mov dword [device.tx_desc + 16], 0
lea eax, [device.tx_desc]
GetRealAddr
mov dword [esi + REG_TDBAL], eax ; Transmit Descriptor Base Address Low
mov dword [esi + REG_TDBAH], 0 ; Transmit Descriptor Base Address High
mov dword [esi + REG_TDLEN], (1 * 128) ; Transmit Descriptor Length
mov dword [esi + REG_TDH], 0 ; Transmit Descriptor Head
mov dword [esi + REG_TDT], 0 ; Transmit Descriptor Tail
mov dword [esi + REG_TCTL], 0x010400fa ; Enabled, Pad Short Packets, 15 retrys, 64-byte COLD, Re-transmit on Late Collision
mov dword [esi + REG_TIPG], 0x0060200A ; IPGT 10, IPGR1 8, IPGR2 6
xor eax, eax
ret
align 4
reset:
call reset_dontstart
start_i8254x:
xor eax, eax
mov [esi + REG_RDTR], eax ; Clear the Receive Delay Timer Register
mov [esi + REG_RADV], eax ; Clear the Receive Interrupt Absolute Delay Timer
mov [esi + REG_RSRPD], eax ; Clear the Receive Small Packet Detect Interrupt
; or eax, 1 shl 0 + 1 shl 7 ; TXDW + RXT0
mov eax, 1+4+16 ;;;; hack!
mov [esi + REG_IMS], eax ; Enable interrupt types
mov [device.mtu], 1514
; Set link state to unknown
mov [device.state], ETH_LINK_UNKOWN
xor eax, eax
ret
align 4
read_mac:
DEBUGF 1,"Read MAC\n"
mov esi, [device.mmio_addr]
mov eax, [esi+0x5400] ; RAL
test eax, eax
jz .try_eeprom
mov dword [device.mac], eax
mov eax, [esi+0x5404] ; RAH
mov word [device.mac+4], ax
jmp .mac_ok
.try_eeprom:
mov dword [esi+0x14], 0x00000001
mov eax, [esi+0x14]
shr eax, 16
mov word [device.mac], ax
mov dword [esi+0x14], 0x00000101
mov eax, [esi+0x14]
shr eax, 16
mov word [device.mac+2], ax
mov dword [esi+0x14], 0x00000201
mov eax, [esi+0x14]
shr eax, 16
mov word [device.mac+4], ax
.mac_ok:
DEBUGF 1,"MAC = %x-%x-%x-%x-%x-%x\n",\
[device.mac+0]:2,[device.mac+1]:2,[device.mac+2]:2,[device.mac+3]:2,[device.mac+4]:2,[device.mac+5]:2
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,"\nTransmitting 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
ja .fail
cmp dword [esp + 8], 60
jb .fail
; Program the descriptor (use legacy mode)
lea edi, [device.tx_desc] ; Transmit Descriptor Base Address
mov dword [edi + 16], eax ; Store the data location (for driver)
GetRealAddr ;
mov dword [edi], eax ; Real addr (for i8254x)
mov dword [edi + 4], 0x00000000 ;
mov ecx, [esp + 8]
or ecx, 1 shl 24 + 1 shl 25 + 1 shl 27 ; EOP + IFCS + RS
mov dword [edi + 8], ecx ; Packet size
mov dword [edi + 12], 0x00000000
; Tell i8254x wich descriptor(s) we programmed
mov edi, [device.mmio_addr]
mov dword [edi + REG_TDH], 0 ; TDH - Transmit Descriptor Head
mov dword [edi + REG_TDT], 1 ; TDT - Transmit Descriptor Tail
; Update stats
inc [device.packets_tx]
mov eax, [esp + 8]
add dword [device.bytes_tx], eax
adc dword [device.bytes_tx + 4], 0
xor eax, eax
ret 8
.fail:
DEBUGF 2,"Send failed\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 IRQ occur
mov ecx, [devices]
test ecx, ecx
jz .nothing
mov esi, device_list
.nextdevice:
mov ebx, [esi]
mov edi, [device.mmio_addr]
mov eax, [edi + REG_ICR]
test eax, eax
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 ", ebx, eax
;---------
; RX done?
test eax, ICR_RXDMT0
jz .no_rx
push eax ebx
push .retaddr
; Get last descriptor addr
lea esi, [device.rx_desc]
cmp byte [esi + 12], 0 ; Check status field
je .retaddr
movzx ecx, word [esi + 8] ; Get the packet length
DEBUGF 1,"got %u bytes\n", ecx
push ecx
push dword [esi + 16] ; Get packet pointer
; Update stats
add dword [device.bytes_rx], ecx
adc dword [device.bytes_rx + 4], 0
inc dword [device.packets_rx]
; allocate new descriptor
stdcall KernelAlloc, 48*1024
mov dword [esi + 16], eax
GetRealAddr
mov dword [esi], eax
; reset descriptor status
mov esi, [device.mmio_addr]
mov dword [esi + REG_RDH], 0x00000000 ; Receive Descriptor Head
mov dword [esi + REG_RDT], 0x00000001 ; Receive Descriptor Tail
jmp Eth_input
.retaddr:
pop ebx eax
.no_rx:
;--------------
; Link Changed?
test eax, ICR_LSC
jz .no_link
DEBUGF 1,"Link Changed\n"
.no_link:
;---------------
; Transmit done?
test eax, ICR_TXDW
jz .no_tx
DEBUGF 1,"Transmit done\n"
lea edi, [device.tx_desc] ; Transmit Descriptor Base Address
push dword [edi + 16] ; Store the data location (for driver)
call KernelFree
.no_tx:
.fail:
pop edi esi ebx
xor eax, eax
inc eax
ret
; End of code
section '.data' data readable writable align 16
align 4
devices dd 0
version dd (DRIVER_VERSION shl 16) or (API_VERSION and 0xFFFF)
my_service db 'I8254X',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