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[/] [amber/] [trunk/] [hw/] [tests/] [ethmac_reg.S] - Rev 66
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/*****************************************************************
// //
// Amber 2 System Ethernet MAC Test //
// //
// This file is part of the Amber project //
// http://www.opencores.org/project,amber //
// //
// Description //
// Tests wishbone access to registers in the Ethernet MAC //
// module. //
// //
// Author(s): //
// - Conor Santifort, csantifort.amber@gmail.com //
// //
//////////////////////////////////////////////////////////////////
// //
// Copyright (C) 2010 Authors and OPENCORES.ORG //
// //
// This source file may be used and distributed without //
// restriction provided that this copyright statement is not //
// removed from the file and that any derivative work contains //
// the original copyright notice and the associated disclaimer. //
// //
// This source file is free software; you can redistribute it //
// and/or modify it under the terms of the GNU Lesser General //
// Public License as published by the Free Software Foundation; //
// either version 2.1 of the License, or (at your option) any //
// later version. //
// //
// This source is distributed in the hope that it will be //
// useful, but WITHOUT ANY WARRANTY; without even the implied //
// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR //
// PURPOSE. See the GNU Lesser General Public License for more //
// details. //
// //
// You should have received a copy of the GNU Lesser General //
// Public License along with this source; if not, download it //
// from http://www.opencores.org/lgpl.shtml //
// //
*****************************************************************/
#include "amber_registers.h"
.section .text
.globl main
main:
@ Test reading of a register in the ethmac module
ldr r0, AdrEthMacModer
ldr r1, [r0]
ldr r2, EthMacModerDefault
cmp r1, r2
movne r10, #10
bne testfail
@ Turn on Duplex Mode, bit 10, and write back new value
orr r1, r1, #0x400
str r1, [r0]
@ Read back again to check the value
ldr r3, [r0]
orr r2, r2, #0x400
cmp r3, r2
movne r10, #20
bne testfail
@ Set clock divider to 10 -> 3.3MHz MDC
ldr r4, AdrEthMacMIIModer
mov r5, #10
str r5, [r4]
@ Set MII address - device [4:0], register [12:8]
ldr r4, AdrEthMacMIIAddress
mov r5, #0x07
orr r5, r5, #0x1600
str r5, [r4]
@ receive (read PHY register) Command
ldr r4, AdrEthMacMIICommand
mov r5, #0x2
str r5, [r4]
@ wait for busy, bit 1, to go low
@ Use r6 as a timeout
ldr r4, AdrEthMacMIIStatus
mov r6, #0
wait_busy:
add r6, r6, #1
cmp r6, #0x400
@ Timeout error
moveq r10, #30
beq testfail
ldr r5, [r4]
ands r5, r5, #2
beq readback
b wait_busy
readback:
ldr r4, AdrEthMacMIIRxData
ldr r5, [r4]
ldr r6, ExpectedMIIReadBack
cmp r5, r6
movne r10, #100
bne testfail
b testpass
testfail:
ldr r11, AdrTestStatus
str r10, [r11]
b testfail
testpass:
ldr r11, AdrTestStatus
mov r10, #17
str r10, [r11]
b testpass
/* Write 17 to this address to generate a Test Passed message */
AdrTestStatus: .word ADR_AMBER_TEST_STATUS
AdrEthMacModer: .word ADR_ETHMAC_MODER
AdrEthMacMIIModer: .word ADR_ETHMAC_MIIMODER
AdrEthMacMIICommand: .word ADR_ETHMAC_MIICOMMAND
AdrEthMacMIIAddress: .word ADR_ETHMAC_MIIADDRESS
AdrEthMacMIITxData: .word ADR_ETHMAC_MIITXDATA
AdrEthMacMIIRxData: .word ADR_ETHMAC_MIIRXDATA
AdrEthMacMIIStatus: .word ADR_ETHMAC_MIISTATUS
EthMacModerDefault: .word 0x0000a000
ExpectedMIIReadBack: .word 0x0000ffff
/* ========================================================================= */
/* ========================================================================= */
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