1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Common PowerQUICC II code.
4 *
5 * Author: Scott Wood <scottwood@freescale.com>
6 * Copyright (c) 2007 Freescale Semiconductor
7 *
8 * Based on code by Vitaly Bordug <vbordug@ru.mvista.com>
9 * pq2_restart fix by Wade Farnsworth <wfarnsworth@mvista.com>
10 * Copyright (c) 2006 MontaVista Software, Inc.
11 */
12
13#include <linux/kprobes.h>
14
15#include <asm/cpm2.h>
16#include <asm/io.h>
17#include <asm/pci-bridge.h>
18
19#include <platforms/82xx/pq2.h>
20
21#define RMR_CSRE 0x00000001
22
23void __noreturn pq2_restart(char *cmd)
24{
25	local_irq_disable();
26	setbits32(&cpm2_immr->im_clkrst.car_rmr, RMR_CSRE);
27
28	/* Clear the ME,EE,IR & DR bits in MSR to cause checkstop */
29	mtmsr(mfmsr() & ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR));
30	in_8(&cpm2_immr->im_clkrst.res[0]);
31
32	panic("Restart failed\n");
33}
34NOKPROBE_SYMBOL(pq2_restart)
35
36#ifdef CONFIG_PCI
37static int pq2_pci_exclude_device(struct pci_controller *hose,
38                                  u_char bus, u8 devfn)
39{
40	if (bus == 0 && PCI_SLOT(devfn) == 0)
41		return PCIBIOS_DEVICE_NOT_FOUND;
42	else
43		return PCIBIOS_SUCCESSFUL;
44}
45
46static void __init pq2_pci_add_bridge(struct device_node *np)
47{
48	struct pci_controller *hose;
49	struct resource r;
50
51	if (of_address_to_resource(np, 0, &r) || r.end - r.start < 0x10b)
52		goto err;
53
54	pci_add_flags(PCI_REASSIGN_ALL_BUS);
55
56	hose = pcibios_alloc_controller(np);
57	if (!hose)
58		return;
59
60	hose->dn = np;
61
62	setup_indirect_pci(hose, r.start + 0x100, r.start + 0x104, 0);
63	pci_process_bridge_OF_ranges(hose, np, 1);
64
65	return;
66
67err:
68	printk(KERN_ERR "No valid PCI reg property in device tree\n");
69}
70
71void __init pq2_init_pci(void)
72{
73	struct device_node *np;
74
75	ppc_md.pci_exclude_device = pq2_pci_exclude_device;
76
77	for_each_compatible_node(np, NULL, "fsl,pq2-pci")
78		pq2_pci_add_bridge(np);
79}
80#endif
81