1 /*
2 * Copyright 2001 MontaVista Software Inc.
3 * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
4 *
5 * arch/mips/gt64120/momenco_ocelot/pci.c
6 * Board-specific PCI routines for gt64120 controller.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 */
13 #include <linux/types.h>
14 #include <linux/pci.h>
15 #include <linux/kernel.h>
16 #include <linux/version.h>
17 #include <linux/init.h>
18 #include <asm/pci.h>
19
pci_range_ck(unsigned char bus,unsigned char dev)20 static __inline__ int pci_range_ck(unsigned char bus, unsigned char dev)
21 {
22 /*
23 * We don't even pretend to handle other busses than bus 0 correctly.
24 * Accessing device 31 crashes the CP7000 for some reason.
25 */
26 if ((bus == 0) && (dev != 31))
27 return 0;
28
29 return -1;
30 }
31
32
gt64120_board_pcibios_fixup_bus(struct pci_bus * bus)33 void __init gt64120_board_pcibios_fixup_bus(struct pci_bus *bus)
34 {
35 struct pci_bus *current_bus = bus;
36 struct pci_dev *devices;
37 struct list_head *devices_link;
38 u16 cmd;
39
40 list_for_each(devices_link, &(current_bus->devices)) {
41
42 devices = pci_dev_b(devices_link);
43 if (devices == NULL)
44 continue;
45
46 if (PCI_SLOT(devices->devfn) == 1) {
47 /*
48 * Slot 1 is primary ether port, i82559
49 * we double-check against that assumption
50 */
51 if ((devices->vendor != 0x8086) ||
52 (devices->device != 0x1209) ) {
53 panic("gt64120_board_pcibios_fixup_bus: found "
54 "unexpected PCI device in slot 1.");
55 }
56 devices->irq = 2; /* irq_nr is 2 for INT0 */
57 } else if (PCI_SLOT(devices->devfn) == 2) {
58 /*
59 * Slot 2 is secondary ether port, i21143
60 * we double-check against that assumption
61 */
62 if ((devices->vendor != 0x1011) ||
63 (devices->device != 0x19) ) {
64 panic("gt64120_board_pcibios_fixup_bus: "
65 "found unexpected PCI device in slot 2.");
66 }
67 devices->irq = 3; /* irq_nr is 3 for INT1 */
68 } else if (PCI_SLOT(devices->devfn) == 4) {
69 /* PMC Slot 1 */
70 devices->irq = 8; /* irq_nr is 8 for INT6 */
71 } else if (PCI_SLOT(devices->devfn) == 5) {
72 /* PMC Slot 1 */
73 devices->irq = 9; /* irq_nr is 9 for INT7 */
74 } else {
75 /* We don't have assign interrupts for other devices. */
76 devices->irq = 0xff;
77 }
78
79 /* Assign an interrupt number for the device */
80 bus->ops->write_byte(devices, PCI_INTERRUPT_LINE, devices->irq);
81
82 /* enable master */
83 bus->ops->read_word(devices, PCI_COMMAND, &cmd);
84 cmd |= PCI_COMMAND_MASTER;
85 bus->ops->write_word(devices, PCI_COMMAND, cmd);
86 }
87 }
88