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) 2003, 2004 Ralf Baechle (ralf@linux-mips.org)
8 #include <linux/kernel.h>
9 #include <linux/types.h>
10 #include <linux/pci.h>
12 #include <asm/marvell.h>
14 static int mv_read_config(struct pci_bus *bus, unsigned int devfn,
15 int where, int size, u32 * val)
17 struct mv_pci_controller *mvbc = bus->sysdata;
18 unsigned long address_reg, data_reg;
21 address_reg = mvbc->config_addr;
22 data_reg = mvbc->config_vreg;
24 /* Accessing device 31 crashes those Marvells. Since years.
25 Will they ever make sane controllers ... */
26 if (PCI_SLOT(devfn) == 31)
27 return PCIBIOS_DEVICE_NOT_FOUND;
29 address = (bus->number << 16) | (devfn << 8) |
30 (where & 0xfc) | 0x80000000;
32 /* start the configuration cycle */
33 MV_WRITE(address_reg, address);
37 *val = MV_READ_8(data_reg + (where & 0x3));
41 *val = MV_READ_16(data_reg + (where & 0x3));
45 *val = MV_READ(data_reg);
49 return PCIBIOS_SUCCESSFUL;
52 static int mv_write_config(struct pci_bus *bus, unsigned int devfn,
53 int where, int size, u32 val)
55 struct mv_pci_controller *mvbc = bus->sysdata;
56 unsigned long address_reg, data_reg;
59 address_reg = mvbc->config_addr;
60 data_reg = mvbc->config_vreg;
62 /* Accessing device 31 crashes those Marvells. Since years.
63 Will they ever make sane controllers ... */
64 if (PCI_SLOT(devfn) == 31)
65 return PCIBIOS_DEVICE_NOT_FOUND;
67 address = (bus->number << 16) | (devfn << 8) |
68 (where & 0xfc) | 0x80000000;
70 /* start the configuration cycle */
71 MV_WRITE(address_reg, address);
75 MV_WRITE_8(data_reg + (where & 0x3), val);
79 MV_WRITE_16(data_reg + (where & 0x3), val);
83 MV_WRITE(data_reg, val);
87 return PCIBIOS_SUCCESSFUL;
90 struct pci_ops mv_pci_ops = {
91 .read = mv_read_config,
92 .write = mv_write_config