1/*
2 * FSL SoC setup code
3 *
4 * Maintained by Kumar Gala (see MAINTAINERS for contact information)
5 *
6 * This program is free software; you can redistribute  it and/or modify it
7 * under  the terms of  the GNU General  Public License as published by the
8 * Free Software Foundation;  either version 2 of the  License, or (at your
9 * option) any later version.
10 */
11
12#include <linux/stddef.h>
13#include <linux/kernel.h>
14#include <linux/init.h>
15#include <linux/errno.h>
16#include <linux/pci.h>
17#include <linux/delay.h>
18#include <linux/irq.h>
19#include <linux/module.h>
20
21#include <asm/system.h>
22#include <asm/atomic.h>
23#include <asm/io.h>
24#include <asm/pci-bridge.h>
25#include <asm/prom.h>
26#include <sysdev/fsl_soc.h>
27
28#undef DEBUG
29
30#ifdef DEBUG
31#define DBG(x...) printk(x)
32#else
33#define DBG(x...)
34#endif
35
36int mpc85xx_pci2_busno = 0;
37
38#ifdef CONFIG_PCI
39int __init add_bridge(struct device_node *dev)
40{
41	int len;
42	struct pci_controller *hose;
43	struct resource rsrc;
44	const int *bus_range;
45	int primary = 1, has_address = 0;
46	phys_addr_t immr = get_immrbase();
47
48	DBG("Adding PCI host bridge %s\n", dev->full_name);
49
50	/* Fetch host bridge registers address */
51	has_address = (of_address_to_resource(dev, 0, &rsrc) == 0);
52
53	/* Get bus range if any */
54	bus_range = of_get_property(dev, "bus-range", &len);
55	if (bus_range == NULL || len < 2 * sizeof(int)) {
56		printk(KERN_WARNING "Can't get bus-range for %s, assume"
57		       " bus 0\n", dev->full_name);
58	}
59
60	hose = pcibios_alloc_controller();
61	if (!hose)
62		return -ENOMEM;
63	hose->arch_data = dev;
64	hose->set_cfg_type = 1;
65
66	hose->first_busno = bus_range ? bus_range[0] : 0;
67	hose->last_busno = bus_range ? bus_range[1] : 0xff;
68
69	/* PCI 1 */
70	if ((rsrc.start & 0xfffff) == 0x8000) {
71		setup_indirect_pci(hose, immr + 0x8000, immr + 0x8004);
72	}
73	/* PCI 2 */
74	if ((rsrc.start & 0xfffff) == 0x9000) {
75		setup_indirect_pci(hose, immr + 0x9000, immr + 0x9004);
76		primary = 0;
77		hose->bus_offset = hose->first_busno;
78		mpc85xx_pci2_busno = hose->first_busno;
79	}
80
81	printk(KERN_INFO "Found MPC85xx PCI host bridge at 0x%016llx. "
82	       "Firmware bus number: %d->%d\n",
83		(unsigned long long)rsrc.start, hose->first_busno,
84		hose->last_busno);
85
86	DBG(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
87		hose, hose->cfg_addr, hose->cfg_data);
88
89	/* Interpret the "ranges" property */
90	/* This also maps the I/O region and sets isa_io/mem_base */
91	pci_process_bridge_OF_ranges(hose, dev, primary);
92
93	return 0;
94}
95
96#endif
97