WebSVN – Kolibri OS – Blame – /kernel/trunk/network/eth_drv/drivers/i8255x.inc

Rev	Author	Line No.	Line
261	hidnplayr	1	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		2	;; ;;
431	serge	3	;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;;
		4	;; Distributed under terms of the GNU General Public License ;;
		5	;; ;;
		6	;; ;;
261	hidnplayr	7	;; I8255X.INC ;;
		8	;; ;;
		9	;; Ethernet driver for Menuet OS ;;
		10	;; ;;
		11	;; Version 0.3 11 August 2003 ;;
		12	;; ;;
		13	;; This driver is based on the eepro100 driver from ;;
		14	;; the etherboot 5.0.6 project. The copyright statement is ;;
		15	;; ;;
		16	;; GNU GENERAL PUBLIC LICENSE ;;
		17	;; Version 2, June 1991 ;;
		18	;; ;;
		19	;; remaining parts Copyright 2002 Mike Hibbett, ;;
		20	;; mikeh@oceanfree.net ;;
		21	;; ;;
		22	;; See file COPYING for details ;;
		23	;; ;;
		24	;; ;;
		25	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		26
593	mikedld	27	$Revision: 782 $
261	hidnplayr	28
593	mikedld	29
261	hidnplayr	30	;********************************************************************
		31	; Interface
		32	; I8255x_reset
		33	; I8255x_probe
		34	; I8255x_poll
		35	; I8255x_transmit
		36	;
		37	; These functions are referenced in ethernet.inc
		38	;
		39	;********************************************************************
		40
		41
782	hidnplayr	42	rxfd_status equ eth_data_start
		43	rxfd_command equ eth_data_start + 2
		44	rxfd_link equ eth_data_start + 4
		45	rxfd_rx_buf_addr equ eth_data_start + 8
		46	rxfd_count equ eth_data_start + 12
		47	rxfd_size equ eth_data_start + 14
		48	rxfd_packet equ eth_data_start + 16
261	hidnplayr	49
		50
		51
		52	uglobal
782	hidnplayr	53	eeprom_data: times 16 dd 0
261	hidnplayr	54
		55	align 4
		56
		57	lstats:
		58	tx_good_frames: dd 0
		59	tx_coll16_errs: dd 0
		60	tx_late_colls: dd 0
		61	tx_underruns: dd 0
		62	tx_lost_carrier: dd 0
		63	tx_deferred: dd 0
		64	tx_one_colls: dd 0
		65	tx_multi_colls: dd 0
		66	tx_total_colls: dd 0
		67	rx_good_frames: dd 0
		68	rx_crc_errs: dd 0
		69	rx_align_errs: dd 0
		70	rx_resource_errs: dd 0
		71	rx_overrun_errs: dd 0
		72	rx_colls_errs: dd 0
		73	rx_runt_errs: dd 0
		74	done_marker: dd 0
		75
		76	align 4
		77
		78	confcmd:
782	hidnplayr	79	confcmd_status: dw 0
		80	confcmd_command: dw 0
		81	confcmd_link: dd 0
261	hidnplayr	82	endg
		83
		84	iglobal
782	hidnplayr	85	confcmd_data: db 22, 0x08, 0, 0, 0, 0x80, 0x32, 0x03, 1
		86	db 0, 0x2e, 0, 0x60, 0, 0xf2, 0x48, 0, 0x40, 0xf2
		87	db 0x80, 0x3f, 0x05
261	hidnplayr	88	endg
		89
		90	uglobal
		91	align 4
		92
		93	txfd:
782	hidnplayr	94	txfd_status: dw 0
		95	txfd_command: dw 0
		96	txfd_link: dd 0
		97	txfd_tx_desc_addr: dd 0
		98	txfd_count: dd 0
		99	txfd_tx_buf_addr0: dd 0
		100	txfd_tx_buf_size0: dd 0
		101	txfd_tx_buf_addr1: dd 0
		102	txfd_tx_buf_size1: dd 0
261	hidnplayr	103
		104	align 4
		105
		106	hdr:
782	hidnplayr	107	hdr_dst_addr: times 6 db 0
		108	hdr_src_addr: times 6 db 0
		109	hdr_type: dw 0
261	hidnplayr	110	endg
		111
		112
		113	;***************************************************************************
		114	; Function
		115	; wait_for_cmd_done
		116	;
		117	; Description
		118	; waits for the hardware to complete a command
		119	; port address in edx
		120	;
		121	; al destroyed
		122	;***************************************************************************
		123	wait_for_cmd_done:
782	hidnplayr	124	in al, dx
		125	cmp al, 0
		126	jne wait_for_cmd_done
261	hidnplayr	127	ret
		128
		129
		130
		131	;***************************************************************************
		132	; Function
		133	; mdio_read
		134	;
		135	; Description
		136	; This probably reads a register in the "physical media interface chip"
		137	; Phy_id in ebx
		138	; location in ecx
		139	;
		140	; Data returned in eax
		141	;
		142	;***************************************************************************
		143	mdio_read:
782	hidnplayr	144	mov edx, [io_addr]
		145	add edx, 16 ; SCBCtrlMDI
261	hidnplayr	146
782	hidnplayr	147	mov eax, 0x08000000
		148	shl ecx, 16
		149	or eax, ecx
		150	shl ebx, 21
		151	or eax, ebx
261	hidnplayr	152
782	hidnplayr	153	out dx, eax
261	hidnplayr	154
		155	mrlp:
		156	call delay_us
782	hidnplayr	157	in eax, dx
		158	mov ecx, eax
		159	and ecx, 0x10000000
		160	jz mrlp
261	hidnplayr	161
782	hidnplayr	162	and eax, 0xffff
261	hidnplayr	163	ret
		164
		165
		166
		167	;***************************************************************************
		168	; Function
		169	; mdio_write
		170	;
		171	; Description
		172	; This probably writes a register in the "physical media interface chip"
		173	; Phy_id in ebx
		174	; location in ecx
		175	; data in edx
		176	; Data returned in eax
		177	;
		178	;***************************************************************************
		179	mdio_write:
782	hidnplayr	180	mov eax, 0x04000000
		181	shl ecx, 16
		182	or eax, ecx
		183	shl ebx, 21
		184	or eax, ebx
		185	or eax, edx
261	hidnplayr	186
782	hidnplayr	187	mov edx, [io_addr]
		188	add edx, 16 ; SCBCtrlMDI
		189	out dx, eax
261	hidnplayr	190
		191	mwlp:
		192	call delay_us
782	hidnplayr	193	in eax, dx
		194	mov ecx, eax
		195	and ecx, 0x10000000
		196	jz mwlp
261	hidnplayr	197
782	hidnplayr	198	and eax, 0xffff
261	hidnplayr	199	ret
		200
		201
		202
		203	;/***********************************************************************/
		204	;/* I82557 related defines */
		205	;/***********************************************************************/
		206
		207	; Serial EEPROM section.
		208	; A "bit" grungy, but we work our way through bit-by-bit :->.
		209	; EEPROM_Ctrl bits.
782	hidnplayr	210	EE_SHIFT_CLK equ 0x01 ; EEPROM shift clock.
		211	EE_CS equ 0x02 ; EEPROM chip select.
		212	EE_DATA_WRITE equ 0x04 ; EEPROM chip data in.
		213	EE_DATA_READ equ 0x08 ; EEPROM chip data out.
		214	EE_WRITE_0 equ 0x4802
		215	EE_WRITE_1 equ 0x4806
		216	EE_ENB equ 0x4802
261	hidnplayr	217
		218
		219	; The EEPROM commands include the alway-set leading bit.
782	hidnplayr	220	EE_READ_CMD equ 6
261	hidnplayr	221
		222	; The SCB accepts the following controls for the Tx and Rx units:
		223	CU_START equ 0x0010
		224	CU_RESUME equ 0x0020
		225	CU_STATSADDR equ 0x0040
		226	CU_SHOWSTATS equ 0x0050 ; Dump statistics counters.
		227	CU_CMD_BASE equ 0x0060 ; Base address to add to add CU commands.
		228	CU_DUMPSTATS equ 0x0070 ; Dump then reset stats counters.
		229
		230	RX_START equ 0x0001
		231	RX_RESUME equ 0x0002
		232	RX_ABORT equ 0x0004
		233	RX_ADDR_LOAD equ 0x0006
		234	RX_RESUMENR equ 0x0007
		235	INT_MASK equ 0x0100
		236	DRVR_INT equ 0x0200 ; Driver generated interrupt.
		237
		238
		239	;***************************************************************************
		240	; Function
		241	; do_eeprom_cmd
		242	;
		243	; Description
		244	; writes a cmd to the ethernet cards eeprom, by bit bashing
		245	; cmd in ebx
		246	; cmd length in ecx
		247	; return in eax
		248	;***************************************************************************
		249	do_eeprom_cmd:
782	hidnplayr	250	mov edx, [io_addr] ; We only require the value in dx
		251	add dx, 14 ; the value SCBeeprom
261	hidnplayr	252
782	hidnplayr	253	mov ax, EE_ENB
		254	out dx, ax
261	hidnplayr	255	call delay_us
		256
782	hidnplayr	257	mov ax, 0x4803 ; EE_ENB \| EE_SHIFT_CLK
		258	out dx, ax
261	hidnplayr	259	call delay_us
		260
		261	; dx holds ee_addr
		262	; ecx holds count
		263	; eax holds cmd
782	hidnplayr	264	xor edi, edi ; this will be the receive data
261	hidnplayr	265
		266	dec_001:
782	hidnplayr	267	mov esi, 1
261	hidnplayr	268
782	hidnplayr	269	dec ecx
		270	shl esi, cl
		271	inc ecx
		272	and esi, ebx
		273	mov eax, EE_WRITE_0 ; I am assuming this doesnt affect the flags..
		274	cmp esi,0
		275	jz dec_002
		276	mov eax, EE_WRITE_1
261	hidnplayr	277
		278	dec_002:
782	hidnplayr	279	out dx, ax
261	hidnplayr	280	call delay_us
		281
782	hidnplayr	282	or ax, EE_SHIFT_CLK
		283	out dx, ax
261	hidnplayr	284	call delay_us
		285
782	hidnplayr	286	shl edi,1
261	hidnplayr	287
782	hidnplayr	288	in ax, dx
		289	and ax, EE_DATA_READ
		290	cmp ax,0
		291	jz dec_003
		292	inc edi
261	hidnplayr	293
		294	dec_003:
		295	loop dec_001
		296
782	hidnplayr	297	mov ax, EE_ENB
		298	out dx, ax
261	hidnplayr	299	call delay_us
		300
782	hidnplayr	301	mov ax, 0x4800
		302	out dx, ax
261	hidnplayr	303	call delay_us
		304
782	hidnplayr	305	mov eax, edi
261	hidnplayr	306
		307	ret
		308
		309
		310	;***************************************************************************
		311	; Function
		312	; I8255x_probe
		313	; Description
		314	; Searches for an ethernet card, enables it and clears the rx buffer
		315	; If a card was found, it enables the ethernet -> TCPIP link
		316	;
		317	;***************************************************************************
		318	I8255x_probe:
782	hidnplayr	319	DEBUGF 1," K : Probing i8255x device \n"
		320	mov eax, [io_addr]
261	hidnplayr	321
782	hidnplayr	322	mov ebx, [pci_bus]
		323	mov ecx, [pci_dev]
		324	mov edx, 0x04 ; PCI_COMMAND
261	hidnplayr	325	call pcibios_read_config_word
		326
782	hidnplayr	327	or ax, 0x05
		328	mov ebx, [pci_bus]
		329	mov ecx, [pci_dev]
		330	mov edx, 0x04 ; PCI_COMMAND
261	hidnplayr	331	call pcibios_write_config_word
		332
782	hidnplayr	333	mov ebx, 0x6000000
		334	mov ecx, 27
261	hidnplayr	335	call do_eeprom_cmd
782	hidnplayr	336	and eax, 0xffe0000
		337	cmp eax, 0xffe0000
		338	je bige
261	hidnplayr	339
782	hidnplayr	340	mov ebx, 0x1800000
		341	mov ecx, 0x40
		342	jmp doread
261	hidnplayr	343
		344	bige:
782	hidnplayr	345	mov ebx, 0x6000000
		346	mov ecx, 0x100
261	hidnplayr	347
		348	doread:
		349	; do-eeprom-cmd will destroy all registers
		350	; we have eesize in ecx
		351	; read_cmd in ebx
		352
		353	; Ignore full eeprom - just load the mac address
782	hidnplayr	354	mov ecx, 0
261	hidnplayr	355
		356	drlp:
		357	push ecx ; save count
		358	push ebx
782	hidnplayr	359	mov eax, ecx
		360	shl eax, 16
		361	or ebx, eax
		362	mov ecx, 27
261	hidnplayr	363	call do_eeprom_cmd
		364
782	hidnplayr	365	pop ebx
		366	pop ecx
261	hidnplayr	367
782	hidnplayr	368	mov edx, ecx
		369	shl edx, 2
		370	mov esi, eeprom_data
		371	add esi, edx
		372	mov [esi], eax
261	hidnplayr	373
782	hidnplayr	374	inc ecx
		375	cmp ecx, 16
		376	jne drlp
261	hidnplayr	377
		378	; OK, we have the MAC address.
		379	; Now reset the card
		380
782	hidnplayr	381	mov edx, [io_addr]
		382	add dx, 8 ; SCBPort
		383	xor eax, eax ; The reset cmd == 0
		384	out dx, eax
261	hidnplayr	385
782	hidnplayr	386	mov esi, 10
		387	call delay_ms ; Give the card time to warm up.
261	hidnplayr	388
782	hidnplayr	389	mov eax, lstats
		390	mov edx, [io_addr]
		391	add edx, 4 ; SCBPointer
		392	out dx, eax
261	hidnplayr	393
782	hidnplayr	394	mov eax, 0x0140 ; INT_MASK \| CU_STATSADDR
		395	mov edx, [io_addr]
		396	add edx, 2 ; SCBCmd
		397	out dx, ax
261	hidnplayr	398
		399	call wait_for_cmd_done
		400
782	hidnplayr	401	mov eax, 0
		402	mov edx, [io_addr]
		403	add edx, 4 ; SCBPointer
		404	out dx, eax
261	hidnplayr	405
782	hidnplayr	406	mov eax, 0x0106 ; INT_MASK \| RX_ADDR_LOAD
		407	mov edx, [io_addr]
		408	add edx, 2 ; SCBCmd
		409	out dx, ax
261	hidnplayr	410
		411	call wait_for_cmd_done
		412
		413	; build rxrd structure
782	hidnplayr	414	mov ax, 0x0001
		415	mov [rxfd_status], ax
		416	mov ax, 0x0000
		417	mov [rxfd_command], ax
261	hidnplayr	418
782	hidnplayr	419	mov eax, rxfd_status
		420	sub eax, OS_BASE
		421	mov [rxfd_link], eax
261	hidnplayr	422
782	hidnplayr	423	mov eax, Ether_buffer
		424	sub eax, OS_BASE
		425	mov [rxfd_rx_buf_addr], eax
261	hidnplayr	426
782	hidnplayr	427	mov ax, 0
		428	mov [rxfd_count], ax
261	hidnplayr	429
782	hidnplayr	430	mov ax, 1528
		431	mov [rxfd_size], ax
261	hidnplayr	432
782	hidnplayr	433	mov edx, [io_addr]
		434	add edx, 4 ; SCBPointer
261	hidnplayr	435
782	hidnplayr	436	mov eax, rxfd_status
		437	sub eax, OS_BASE
		438	out dx, eax
261	hidnplayr	439
782	hidnplayr	440	mov edx, [io_addr]
		441	add edx, 2 ; SCBCmd
261	hidnplayr	442
782	hidnplayr	443	mov ax, 0x0101 ; INT_MASK \| RX_START
		444	out dx, ax
261	hidnplayr	445
		446	call wait_for_cmd_done
		447
		448	; start the reciver
		449
782	hidnplayr	450	mov ax, 0
		451	mov [rxfd_status], ax
261	hidnplayr	452
782	hidnplayr	453	mov ax, 0xc000
		454	mov [rxfd_command], ax
261	hidnplayr	455
782	hidnplayr	456	mov edx, [io_addr]
		457	add edx, 4 ; SCBPointer
261	hidnplayr	458
782	hidnplayr	459	mov eax, rxfd_status
		460	sub eax, OS_BASE
		461	out dx, eax
261	hidnplayr	462
782	hidnplayr	463	mov edx, [io_addr]
		464	add edx, 2 ; SCBCmd
261	hidnplayr	465
782	hidnplayr	466	mov ax, 0x0101 ; INT_MASK \| RX_START
		467	out dx, ax
261	hidnplayr	468
		469	; Init TX Stuff
		470
782	hidnplayr	471	mov edx, [io_addr]
		472	add edx, 4 ; SCBPointer
261	hidnplayr	473
782	hidnplayr	474	mov eax, 0
		475	out dx, eax
261	hidnplayr	476
782	hidnplayr	477	mov edx, [io_addr]
		478	add edx, 2 ; SCBCmd
261	hidnplayr	479
782	hidnplayr	480	mov ax, 0x0160 ; INT_MASK \| CU_CMD_BASE
		481	out dx, ax
261	hidnplayr	482
		483	call wait_for_cmd_done
		484
		485	; Set TX Base address
		486
		487	; First, set up confcmd values
		488
782	hidnplayr	489	mov ax, 2
		490	mov [confcmd_command], ax
		491	mov eax, txfd
		492	sub eax, OS_BASE
		493	mov [confcmd_link], eax
261	hidnplayr	494
782	hidnplayr	495	mov ax, 1
		496	mov [txfd_command], ax ; CmdIASetup
261	hidnplayr	497
782	hidnplayr	498	mov ax, 0
		499	mov [txfd_status], ax
261	hidnplayr	500
782	hidnplayr	501	mov eax, confcmd
		502	sub eax, OS_BASE
		503	mov [txfd_link], eax
261	hidnplayr	504
782	hidnplayr	505
		506
261	hidnplayr	507	; ETH_ALEN is 6 bytes
		508
782	hidnplayr	509	mov esi, eeprom_data
		510	mov edi, node_addr
		511	mov ecx, 3
261	hidnplayr	512	drp000:
782	hidnplayr	513	mov eax, [esi]
		514	mov [edi], al
		515	shr eax, 8
		516	inc edi
		517	mov [edi], al
		518	inc edi
		519	add esi, 4
261	hidnplayr	520	loop drp000
		521
		522	; Hard code your MAC address into node_addr at this point,
		523	; If you cannot read the MAC address from the eeprom in the previous step.
		524	; You also have to write the mac address into txfd_tx_desc_addr, rather
		525	; than taking data from eeprom_data
		526
782	hidnplayr	527	mov esi, eeprom_data
		528	mov edi, txfd_tx_desc_addr
		529	mov ecx, 3
261	hidnplayr	530	drp001:
782	hidnplayr	531	mov eax, [esi]
		532	mov [edi], al
		533	shr eax, 8
		534	inc edi
		535	mov [edi], al
		536	inc edi
		537	add esi, 4
261	hidnplayr	538	loop drp001
		539
		540
782	hidnplayr	541	mov esi, eeprom_data + (6 * 4)
		542	mov eax, [esi]
		543	shr eax, 8
		544	and eax, 0x3f
		545	cmp eax, 4 ; DP83840
		546	je drp002
		547	cmp eax, 10 ; DP83840A
		548	je drp002
		549	jmp drp003
		550
261	hidnplayr	551	drp002:
782	hidnplayr	552	mov ebx, [esi]
		553	and ebx, 0x1f
261	hidnplayr	554	push ebx
782	hidnplayr	555	mov ecx, 23
261	hidnplayr	556	call mdio_read
782	hidnplayr	557	pop ebx
		558	or eax, 0x0422
		559	mov ecx, 23
		560	mov edx, eax
261	hidnplayr	561	call mdio_write
		562
		563	drp003:
782	hidnplayr	564	mov ax, 0x4002 ; Cmdsuspend \| CmdConfigure
		565	mov [confcmd_command], ax
		566	mov ax, 0
		567	mov [confcmd_status], ax
		568	mov eax, txfd
		569	mov [confcmd_link], eax
		570	mov ebx, confcmd_data
		571	mov al, 0x88 ; fifo of 8 each
		572	mov [ebx + 1], al
		573	mov al, 0
		574	mov [ebx + 4], al
		575	mov al, 0x80
		576	mov [ebx + 5], al
		577	mov al, 0x48
		578	mov [ebx + 15], al
		579	mov al, 0x80
		580	mov [ebx + 19], al
		581	mov al, 0x05
		582	mov [ebx + 21], al
261	hidnplayr	583
782	hidnplayr	584	mov eax, txfd
		585	sub eax, OS_BASE
		586	mov edx, [io_addr]
		587	add edx, 4 ; SCBPointer
		588	out dx, eax
261	hidnplayr	589
782	hidnplayr	590	mov eax, 0x0110 ; INT_MASK \| CU_START
		591	mov edx, [io_addr]
		592	add edx, 2 ; SCBCmd
		593	out dx, ax
261	hidnplayr	594
		595	call wait_for_cmd_done
		596	jmp skip
		597
		598	; wait for thing to start
		599	drp004:
782	hidnplayr	600	mov ax, [txfd_status]
		601	cmp ax, 0
		602	je drp004
261	hidnplayr	603
		604	skip:
		605	; Indicate that we have successfully reset the card
782	hidnplayr	606	mov eax, [pci_data]
		607	mov [eth_status], eax
261	hidnplayr	608
		609	I8255x_exit:
		610	ret
		611
		612
		613
		614	;***************************************************************************
782	hidnplayr	615	; Function
		616	; I8255x_reset
		617	; Description
		618	; Place the chip (ie, the ethernet card) into a virgin state
		619	; No inputs
		620	; All registers destroyed
		621	;
		622	;***************************************************************************
		623	I8255x_reset:
		624	ret
		625
		626
		627
		628	;***************************************************************************
261	hidnplayr	629	; Function
		630	; I8255x_poll
		631	;
		632	; Description
		633	; Polls the ethernet card for a received packet
		634	; Received data, if any, ends up in Ether_buffer
		635	;
		636	;***************************************************************************
		637	I8255x_poll:
782	hidnplayr	638	mov ax, 0 ; assume no data
		639	mov [eth_rx_data_len], ax
261	hidnplayr	640
782	hidnplayr	641	mov ax, [rxfd_status]
		642	cmp ax, 0
		643	je i8p_exit
261	hidnplayr	644
782	hidnplayr	645	mov ax, 0
		646	mov [rxfd_status], ax
261	hidnplayr	647
782	hidnplayr	648	mov ax, 0xc000
		649	mov [rxfd_command], ax
261	hidnplayr	650
782	hidnplayr	651	mov edx, [io_addr]
		652	add edx, 4 ; SCBPointer
261	hidnplayr	653
782	hidnplayr	654	mov eax, rxfd_status
		655	sub eax, OS_BASE
		656	out dx, eax
261	hidnplayr	657
782	hidnplayr	658	mov edx, [io_addr]
		659	add edx, 2 ; SCBCmd
261	hidnplayr	660
782	hidnplayr	661	mov ax, 0x0101 ; INT_MASK \| RX_START
		662	out dx, ax
261	hidnplayr	663
		664	call wait_for_cmd_done
		665
782	hidnplayr	666	mov esi, rxfd_packet
		667	mov edi, Ether_buffer
		668	mov ecx, 1518
261	hidnplayr	669	cld
782	hidnplayr	670	rep movsb
261	hidnplayr	671
782	hidnplayr	672	mov ax, [rxfd_count]
		673	and ax, 0x3fff
		674	mov [eth_rx_data_len], ax
261	hidnplayr	675
		676	i8p_exit:
		677	ret
		678
		679
		680
		681	;***************************************************************************
		682	; Function
		683	; I8255x_transmit
		684	;
		685	; Description
		686	; Transmits a packet of data via the ethernet card
		687	; Pointer to 48 bit destination address in edi
		688	; Type of packet in bx
		689	; size of packet in ecx
		690	; pointer to packet data in esi
		691	;
		692	;***************************************************************************
		693	I8255x_transmit:
		694
782	hidnplayr	695	mov [hdr_type], bx
261	hidnplayr	696
782	hidnplayr	697	mov eax, [edi]
		698	mov [hdr_dst_addr], eax
		699	mov ax, [edi+4]
		700	mov [hdr_dst_addr+4], ax
261	hidnplayr	701
782	hidnplayr	702	mov eax, [node_addr]
		703	mov [hdr_src_addr], eax
		704	mov ax, [node_addr+4]
		705	mov [hdr_src_addr+4], ax
261	hidnplayr	706
782	hidnplayr	707	mov edx, [io_addr]
		708	in ax, dx
		709	and ax, 0xfc00
		710	out dx, ax
261	hidnplayr	711
782	hidnplayr	712	xor ax, ax
		713	mov [txfd_status], ax
		714	mov ax, 0x400C ; Cmdsuspend \| CmdTx \| CmdTxFlex
		715	mov [txfd_command], ax
		716	mov eax, txfd
		717	mov [txfd_link], eax
		718	mov eax, 0x02208000
		719	mov [txfd_count], eax
		720	mov eax, txfd_tx_buf_addr0
		721	sub eax, OS_BASE
		722	mov [txfd_tx_desc_addr], eax
		723	mov eax, hdr
		724	sub eax, OS_BASE
		725	mov [txfd_tx_buf_addr0], eax
		726	mov eax, 14 ; sizeof hdr
		727	mov [txfd_tx_buf_size0], eax
261	hidnplayr	728
		729	; Copy the buffer address and size in
782	hidnplayr	730	mov eax, esi
		731	sub eax, OS_BASE
		732	mov [txfd_tx_buf_addr1], eax
		733	mov eax, ecx
		734	mov [txfd_tx_buf_size1], eax
261	hidnplayr	735
782	hidnplayr	736	mov eax, txfd
		737	sub eax, OS_BASE
		738	mov edx, [io_addr]
		739	add edx, 4 ; SCBPointer
		740	out dx, eax
261	hidnplayr	741
782	hidnplayr	742	mov ax, 0x0110 ; INT_MASK \| CU_START
		743	mov edx, [io_addr]
		744	add edx, 2 ; SCBCmd
		745	out dx, ax
261	hidnplayr	746
		747	call wait_for_cmd_done
		748
782	hidnplayr	749	mov edx, [io_addr]
		750	in ax, dx
261	hidnplayr	751
		752	I8t_001:
782	hidnplayr	753	mov ax, [txfd_status]
		754	cmp ax, 0
		755	je I8t_001
261	hidnplayr	756
782	hidnplayr	757	mov edx, [io_addr]
		758	in ax, dx
261	hidnplayr	759
		760	ret

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(root)/kernel/trunk/network/eth_drv/drivers/i8255x.inc – Rev 782