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