63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
/*
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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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#include <linux/autoconf.h>
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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 <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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}
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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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