1/*
2 * Generic PowerPC 44x platform support
3 *
4 * Copyright 2008 IBM Corporation
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; version 2 of the License.
9 *
10 * This implements simple platform support for PowerPC 44x chips.  This is
11 * mostly used for eval boards or other simple and "generic" 44x boards.  If
12 * your board has custom functions or hardware, then you will likely want to
13 * implement your own board.c file to accommodate it.
14 */
15
16#include <asm/machdep.h>
17#include <asm/pci-bridge.h>
18#include <asm/ppc4xx.h>
19#include <asm/prom.h>
20#include <asm/time.h>
21#include <asm/udbg.h>
22#include <asm/uic.h>
23
24#include <linux/init.h>
25#include <linux/of_platform.h>
26
27static const struct of_device_id ppc44x_of_bus[] __initconst = {
28	{ .compatible = "ibm,plb4", },
29	{ .compatible = "ibm,opb", },
30	{ .compatible = "ibm,ebc", },
31	{ .compatible = "simple-bus", },
32	{},
33};
34
35static int __init ppc44x_device_probe(void)
36{
37	of_platform_bus_probe(NULL, ppc44x_of_bus, NULL);
38
39	return 0;
40}
41machine_device_initcall(ppc44x_simple, ppc44x_device_probe);
42
43/* This is the list of boards that can be supported by this simple
44 * platform code.  This does _not_ mean the boards are compatible,
45 * as they most certainly are not from a device tree perspective.
46 * However, their differences are handled by the device tree and the
47 * drivers and therefore they don't need custom board support files.
48 *
49 * Again, if your board needs to do things differently then create a
50 * board.c file for it rather than adding it to this list.
51 */
52static char *board[] __initdata = {
53	"amcc,arches",
54	"amcc,bamboo",
55	"apm,bluestone",
56	"amcc,glacier",
57	"ibm,ebony",
58	"amcc,eiger",
59	"amcc,katmai",
60	"amcc,rainier",
61	"amcc,redwood",
62	"amcc,sequoia",
63	"amcc,taishan",
64	"amcc,yosemite",
65	"mosaixtech,icon"
66};
67
68static int __init ppc44x_probe(void)
69{
70	unsigned long root = of_get_flat_dt_root();
71	int i = 0;
72
73	for (i = 0; i < ARRAY_SIZE(board); i++) {
74		if (of_flat_dt_is_compatible(root, board[i])) {
75			pci_set_flags(PCI_REASSIGN_ALL_RSRC);
76			return 1;
77		}
78	}
79
80	return 0;
81}
82
83define_machine(ppc44x_simple) {
84	.name = "PowerPC 44x Platform",
85	.probe = ppc44x_probe,
86	.progress = udbg_progress,
87	.init_IRQ = uic_init_tree,
88	.get_irq = uic_get_irq,
89	.restart = ppc4xx_reset_system,
90	.calibrate_decr = generic_calibrate_decr,
91};
92