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67 lines
1.5 KiB
67 lines
1.5 KiB
20 years ago
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/*
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* arch/mips/vr41xx/nec-cmbvr4133/init.c
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*
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* PROM library initialisation code for NEC CMB-VR4133 board.
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*
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* Author: Yoichi Yuasa <yyuasa@mvista.com, or source@mvista.com> and
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* Jun Sun <jsun@mvista.com, or source@mvista.com> and
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* Alex Sapkov <asapkov@ru.mvista.com>
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*
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* 2001-2004 (c) MontaVista, Software, Inc. This file is licensed under
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* the terms of the GNU General Public License version 2. This program
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* is licensed "as is" without any warranty of any kind, whether express
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* or implied.
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*
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* Support for NEC-CMBVR4133 in 2.6
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* Manish Lachwani (mlachwani@mvista.com)
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*/
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#include <linux/config.h>
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#ifdef CONFIG_ROCKHOPPER
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#include <asm/io.h>
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#include <linux/pci.h>
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#define PCICONFDREG 0xaf000c14
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#define PCICONFAREG 0xaf000c18
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void disable_pcnet(void)
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{
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u32 data;
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/*
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* Workaround for the bug in PMON on VR4133. PMON leaves
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* AMD PCNet controller (on Rockhopper) initialized and running in
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* bus master mode. We have do disable it before doing any
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* further initialization. Or we get problems with PCI bus 2
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* and random lockups and crashes.
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*/
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writel((2 << 16) |
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(PCI_DEVFN(1,0) << 8) |
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(0 & 0xfc) |
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1UL,
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PCICONFAREG);
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data = readl(PCICONFDREG);
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writel((2 << 16) |
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(PCI_DEVFN(1,0) << 8) |
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(4 & 0xfc) |
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1UL,
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PCICONFAREG);
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data = readl(PCICONFDREG);
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writel((2 << 16) |
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(PCI_DEVFN(1,0) << 8) |
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(4 & 0xfc) |
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1UL,
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PCICONFAREG);
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data &= ~4;
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writel(data, PCICONFDREG);
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}
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#endif
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