84 lines
2.4 KiB
C
84 lines
2.4 KiB
C
/*
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* $Id$
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*
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* ADM5120 specific PCI operations
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*
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* Copyright (C) ADMtek Incorporated.
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* Copyright (C) 2005 Jeroen Vreeken (pe1rxq@amsat.org)
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* Copyright (C) 2007 Gabor Juhos <juhosg@freemail.hu>
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* Copyright (C) 2007 OpenWrt.org
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <asm/mach-adm5120/adm5120_defs.h>
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volatile u32* pci_config_address_reg = (volatile u32*)KSEG1ADDR(ADM5120_PCICFG_ADDR);
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volatile u32* pci_config_data_reg = (volatile u32*)KSEG1ADDR(ADM5120_PCICFG_DATA);
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#define PCI_ENABLE 0x80000000
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static int pci_config_read(struct pci_bus *bus, unsigned int devfn, int where,
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int size, uint32_t *val)
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{
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*pci_config_address_reg = ((bus->number & 0xff) << 0x10) |
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((devfn & 0xff) << 0x08) | (where & 0xfc) | PCI_ENABLE;
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switch (size) {
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case 1:
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*val = ((*pci_config_data_reg)>>((where&3)<<3))&0xff;
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break;
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case 2:
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*val = ((*pci_config_data_reg)>>((where&3)<<3))&0xffff;
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break;
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default:
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*val = (*pci_config_data_reg);
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break;
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}
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return PCIBIOS_SUCCESSFUL;
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}
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static int pci_config_write(struct pci_bus *bus, unsigned int devfn, int where,
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int size, uint32_t val)
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{
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*pci_config_address_reg = ((bus->number & 0xff) << 0x10) |
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((devfn & 0xff) << 0x08) | (where & 0xfc) | PCI_ENABLE;
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switch (size) {
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case 1:
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*(volatile u8 *)(((int)pci_config_data_reg) +
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(where & 3)) = val;
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break;
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case 2:
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*(volatile u16 *)(((int)pci_config_data_reg) +
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(where & 2)) = (val);
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break;
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default:
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*pci_config_data_reg = (val);
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}
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return PCIBIOS_SUCCESSFUL;
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}
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struct pci_ops adm5120_pci_ops = {
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.read = pci_config_read,
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.write = pci_config_write,
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};
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