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/arch/mips/pci/fixup-ocelot.c

https://bitbucket.org/evzijst/gittest
C | 75 lines | 43 code | 7 blank | 25 comment | 20 complexity | 8d180ba0d915e52ef43e8e967e6405a0 MD5 | raw file
 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/init.h>
17#include <asm/pci.h>
18
19
20void __devinit pcibios_fixup_bus(struct pci_bus *bus)
21{
22	struct pci_bus *current_bus = bus;
23	struct pci_dev *devices;
24	struct list_head *devices_link;
25	u16 cmd;
26
27	list_for_each(devices_link, &(current_bus->devices)) {
28
29		devices = pci_dev_b(devices_link);
30		if (devices == NULL)
31			continue;
32
33		if (PCI_SLOT(devices->devfn) == 1) {
34			/*
35			 * Slot 1 is primary ether port, i82559
36			 * we double-check against that assumption
37			 */
38			if ((devices->vendor != 0x8086) ||
39			    (devices->device != 0x1209)) {
40				panic("pcibios_fixup_bus: found "
41				     "unexpected PCI device in slot 1.");
42			}
43			devices->irq = 2;	/* irq_nr is 2 for INT0 */
44		} else if (PCI_SLOT(devices->devfn) == 2) {
45			/*
46			 * Slot 2 is secondary ether port, i21143
47			 * we double-check against that assumption
48			 */
49			if ((devices->vendor != 0x1011) ||
50			    (devices->device != 0x19)) {
51				panic("galileo_pcibios_fixup_bus: "
52				      "found unexpected PCI device in slot 2.");
53			}
54			devices->irq = 3;	/* irq_nr is 3 for INT1 */
55		} else if (PCI_SLOT(devices->devfn) == 4) {
56			/* PMC Slot 1 */
57			devices->irq = 8;	/* irq_nr is 8 for INT6 */
58		} else if (PCI_SLOT(devices->devfn) == 5) {
59			/* PMC Slot 1 */
60			devices->irq = 9;	/* irq_nr is 9 for INT7 */
61		} else {
62			/* We don't have assign interrupts for other devices. */
63			devices->irq = 0xff;
64		}
65
66		/* Assign an interrupt number for the device */
67		bus->ops->write_byte(devices, PCI_INTERRUPT_LINE,
68				     devices->irq);
69
70		/* enable master */
71		bus->ops->read_word(devices, PCI_COMMAND, &cmd);
72		cmd |= PCI_COMMAND_MASTER;
73		bus->ops->write_word(devices, PCI_COMMAND, cmd);
74	}
75}