1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Wind River SBC8548 setup and early boot code.
4 *
5 * Copyright 2007 Wind River Systems Inc.
6 *
7 * By Paul Gortmaker (see MAINTAINERS for contact information)
8 *
9 * Based largely on the MPC8548CDS support - Copyright 2005 Freescale Inc.
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/reboot.h>
17#include <linux/pci.h>
18#include <linux/kdev_t.h>
19#include <linux/major.h>
20#include <linux/console.h>
21#include <linux/delay.h>
22#include <linux/seq_file.h>
23#include <linux/initrd.h>
24#include <linux/interrupt.h>
25#include <linux/fsl_devices.h>
26#include <linux/of_platform.h>
27#include <linux/pgtable.h>
28
29#include <asm/page.h>
30#include <linux/atomic.h>
31#include <asm/time.h>
32#include <asm/io.h>
33#include <asm/machdep.h>
34#include <asm/ipic.h>
35#include <asm/pci-bridge.h>
36#include <asm/irq.h>
37#include <mm/mmu_decl.h>
38#include <asm/prom.h>
39#include <asm/udbg.h>
40#include <asm/mpic.h>
41
42#include <sysdev/fsl_soc.h>
43#include <sysdev/fsl_pci.h>
44
45#include "mpc85xx.h"
46
47static int sbc_rev;
48
49static void __init sbc8548_pic_init(void)
50{
51	struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
52			0, 256, " OpenPIC  ");
53	BUG_ON(mpic == NULL);
54	mpic_init(mpic);
55}
56
57/* Extract the HW Rev from the EPLD on the board */
58static int __init sbc8548_hw_rev(void)
59{
60	struct device_node *np;
61	struct resource res;
62	unsigned int *rev;
63	int board_rev = 0;
64
65	np = of_find_compatible_node(NULL, NULL, "hw-rev");
66	if (np == NULL) {
67		printk("No HW-REV found in DTB.\n");
68		return -ENODEV;
69	}
70
71	of_address_to_resource(np, 0, &res);
72	of_node_put(np);
73
74	rev = ioremap(res.start,sizeof(unsigned int));
75	board_rev = (*rev) >> 28;
76	iounmap(rev);
77
78	return board_rev;
79}
80
81/*
82 * Setup the architecture
83 */
84static void __init sbc8548_setup_arch(void)
85{
86	if (ppc_md.progress)
87		ppc_md.progress("sbc8548_setup_arch()", 0);
88
89	fsl_pci_assign_primary();
90
91	sbc_rev = sbc8548_hw_rev();
92}
93
94static void sbc8548_show_cpuinfo(struct seq_file *m)
95{
96	uint pvid, svid, phid1;
97
98	pvid = mfspr(SPRN_PVR);
99	svid = mfspr(SPRN_SVR);
100
101	seq_printf(m, "Vendor\t\t: Wind River\n");
102	seq_printf(m, "Machine\t\t: SBC8548 v%d\n", sbc_rev);
103	seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
104	seq_printf(m, "SVR\t\t: 0x%x\n", svid);
105
106	/* Display cpu Pll setting */
107	phid1 = mfspr(SPRN_HID1);
108	seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
109}
110
111machine_arch_initcall(sbc8548, mpc85xx_common_publish_devices);
112
113/*
114 * Called very early, device-tree isn't unflattened
115 */
116static int __init sbc8548_probe(void)
117{
118	return of_machine_is_compatible("SBC8548");
119}
120
121define_machine(sbc8548) {
122	.name		= "SBC8548",
123	.probe		= sbc8548_probe,
124	.setup_arch	= sbc8548_setup_arch,
125	.init_IRQ	= sbc8548_pic_init,
126	.show_cpuinfo	= sbc8548_show_cpuinfo,
127	.get_irq	= mpic_get_irq,
128#ifdef CONFIG_PCI
129	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
130	.pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
131#endif
132	.calibrate_decr = generic_calibrate_decr,
133	.progress	= udbg_progress,
134};
135