2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (C) 2000, 2001 Keith M Wesolowski
8 #include <linux/kernel.h>
9 #include <linux/init.h>
10 #include <linux/pci.h>
11 #include <linux/types.h>
13 #include <asm/ip32/mace.h>
16 # define DPRINTK(args...) printk(args);
18 # define DPRINTK(args...)
22 * O2 has up to 5 PCI devices connected into the MACE bridge. The device
23 * map looks like this:
32 static inline int mkaddr(struct pci_bus *bus, unsigned int devfn,
35 return ((bus->number & 0xff) << 16) |
36 ((devfn & 0xff) << 8) |
42 mace_pci_read_config(struct pci_bus *bus, unsigned int devfn,
43 int reg, int size, u32 *val)
45 u32 control = mace->pci.control;
47 /* disable master aborts interrupts during config read */
48 mace->pci.control = control & ~MACEPCI_CONTROL_MAR_INT;
49 mace->pci.config_addr = mkaddr(bus, devfn, reg);
52 *val = mace->pci.config_data.b[(reg & 3) ^ 3];
55 *val = mace->pci.config_data.w[((reg >> 1) & 1) ^ 1];
58 *val = mace->pci.config_data.l;
61 /* ack possible master abort */
62 mace->pci.error &= ~MACEPCI_ERROR_MASTER_ABORT;
63 mace->pci.control = control;
65 * someone forgot to set the ultra bit for the onboard
66 * scsi chips; we fake it here
68 if (bus->number == 0 && reg == 0x40 && size == 4 &&
69 (devfn == (1 << 3) || devfn == (2 << 3)))
72 DPRINTK("read%d: reg=%08x,val=%02x\n", size * 8, reg, *val);
74 return PCIBIOS_SUCCESSFUL;
78 mace_pci_write_config(struct pci_bus *bus, unsigned int devfn,
79 int reg, int size, u32 val)
81 mace->pci.config_addr = mkaddr(bus, devfn, reg);
84 mace->pci.config_data.b[(reg & 3) ^ 3] = val;
87 mace->pci.config_data.w[((reg >> 1) & 1) ^ 1] = val;
90 mace->pci.config_data.l = val;
94 DPRINTK("write%d: reg=%08x,val=%02x\n", size * 8, reg, val);
96 return PCIBIOS_SUCCESSFUL;
99 struct pci_ops mace_pci_ops = {
100 .read = mace_pci_read_config,
101 .write = mace_pci_write_config,