1/*
2 * Wind River SBC8548 setup and early boot code.
3 *
4 * Copyright 2007 Wind River Systems Inc.
5 *
6 * By Paul Gortmaker (see MAINTAINERS for contact information)
7 *
8 * Based largely on the MPC8548CDS support - Copyright 2005 Freescale Inc.
9 *
10 *
11 * This program is free software; you can redistribute  it and/or modify it
12 * under  the terms of  the GNU General  Public License as published by the
13 * Free Software Foundation;  either version 2 of the  License, or (at your
14 * option) any later version.
15 */
16
17#include <linux/stddef.h>
18#include <linux/kernel.h>
19#include <linux/init.h>
20#include <linux/errno.h>
21#include <linux/reboot.h>
22#include <linux/pci.h>
23#include <linux/kdev_t.h>
24#include <linux/major.h>
25#include <linux/console.h>
26#include <linux/delay.h>
27#include <linux/seq_file.h>
28#include <linux/initrd.h>
29#include <linux/interrupt.h>
30#include <linux/fsl_devices.h>
31#include <linux/of_platform.h>
32
33#include <asm/pgtable.h>
34#include <asm/page.h>
35#include <linux/atomic.h>
36#include <asm/time.h>
37#include <asm/io.h>
38#include <asm/machdep.h>
39#include <asm/ipic.h>
40#include <asm/pci-bridge.h>
41#include <asm/irq.h>
42#include <mm/mmu_decl.h>
43#include <asm/prom.h>
44#include <asm/udbg.h>
45#include <asm/mpic.h>
46
47#include <sysdev/fsl_soc.h>
48#include <sysdev/fsl_pci.h>
49
50#include "mpc85xx.h"
51
52static int sbc_rev;
53
54static void __init sbc8548_pic_init(void)
55{
56	struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
57			0, 256, " OpenPIC  ");
58	BUG_ON(mpic == NULL);
59	mpic_init(mpic);
60}
61
62/* Extract the HW Rev from the EPLD on the board */
63static int __init sbc8548_hw_rev(void)
64{
65	struct device_node *np;
66	struct resource res;
67	unsigned int *rev;
68	int board_rev = 0;
69
70	np = of_find_compatible_node(NULL, NULL, "hw-rev");
71	if (np == NULL) {
72		printk("No HW-REV found in DTB.\n");
73		return -ENODEV;
74	}
75
76	of_address_to_resource(np, 0, &res);
77	of_node_put(np);
78
79	rev = ioremap(res.start,sizeof(unsigned int));
80	board_rev = (*rev) >> 28;
81	iounmap(rev);
82
83	return board_rev;
84}
85
86/*
87 * Setup the architecture
88 */
89static void __init sbc8548_setup_arch(void)
90{
91	if (ppc_md.progress)
92		ppc_md.progress("sbc8548_setup_arch()", 0);
93
94	fsl_pci_assign_primary();
95
96	sbc_rev = sbc8548_hw_rev();
97}
98
99static void sbc8548_show_cpuinfo(struct seq_file *m)
100{
101	uint pvid, svid, phid1;
102
103	pvid = mfspr(SPRN_PVR);
104	svid = mfspr(SPRN_SVR);
105
106	seq_printf(m, "Vendor\t\t: Wind River\n");
107	seq_printf(m, "Machine\t\t: SBC8548 v%d\n", sbc_rev);
108	seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
109	seq_printf(m, "SVR\t\t: 0x%x\n", svid);
110
111	/* Display cpu Pll setting */
112	phid1 = mfspr(SPRN_HID1);
113	seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
114}
115
116machine_arch_initcall(sbc8548, mpc85xx_common_publish_devices);
117
118/*
119 * Called very early, device-tree isn't unflattened
120 */
121static int __init sbc8548_probe(void)
122{
123        unsigned long root = of_get_flat_dt_root();
124
125        return of_flat_dt_is_compatible(root, "SBC8548");
126}
127
128define_machine(sbc8548) {
129	.name		= "SBC8548",
130	.probe		= sbc8548_probe,
131	.setup_arch	= sbc8548_setup_arch,
132	.init_IRQ	= sbc8548_pic_init,
133	.show_cpuinfo	= sbc8548_show_cpuinfo,
134	.get_irq	= mpic_get_irq,
135	.restart	= fsl_rstcr_restart,
136#ifdef CONFIG_PCI
137	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
138	.pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
139#endif
140	.calibrate_decr = generic_calibrate_decr,
141	.progress	= udbg_progress,
142};
143