1/*
2 * MPC86xx HPCN board specific routines
3 *
4 * Recode: ZHANG WEI <wei.zhang@freescale.com>
5 * Initial author: Xianghua Xiao <x.xiao@freescale.com>
6 *
7 * Copyright 2006 Freescale Semiconductor Inc.
8 *
9 * This program is free software; you can redistribute  it and/or modify it
10 * under  the terms of  the GNU General  Public License as published by the
11 * Free Software Foundation;  either version 2 of the  License, or (at your
12 * option) any later version.
13 */
14
15#include <linux/stddef.h>
16#include <linux/kernel.h>
17#include <linux/pci.h>
18#include <linux/kdev_t.h>
19#include <linux/delay.h>
20#include <linux/seq_file.h>
21#include <linux/of_platform.h>
22
23#include <asm/time.h>
24#include <asm/machdep.h>
25#include <asm/pci-bridge.h>
26#include <asm/prom.h>
27#include <mm/mmu_decl.h>
28#include <asm/udbg.h>
29#include <asm/swiotlb.h>
30
31#include <asm/mpic.h>
32
33#include <sysdev/fsl_pci.h>
34#include <sysdev/fsl_soc.h>
35
36#include "mpc86xx.h"
37
38#undef DEBUG
39
40#ifdef DEBUG
41#define DBG(fmt...) do { printk(KERN_ERR fmt); } while(0)
42#else
43#define DBG(fmt...) do { } while(0)
44#endif
45
46#ifdef CONFIG_PCI
47extern int uli_exclude_device(struct pci_controller *hose,
48				u_char bus, u_char devfn);
49
50static int mpc86xx_exclude_device(struct pci_controller *hose,
51				   u_char bus, u_char devfn)
52{
53	if (hose->dn == fsl_pci_primary)
54		return uli_exclude_device(hose, bus, devfn);
55
56	return PCIBIOS_SUCCESSFUL;
57}
58#endif /* CONFIG_PCI */
59
60
61static void __init
62mpc86xx_hpcn_setup_arch(void)
63{
64	if (ppc_md.progress)
65		ppc_md.progress("mpc86xx_hpcn_setup_arch()", 0);
66
67#ifdef CONFIG_PCI
68	ppc_md.pci_exclude_device = mpc86xx_exclude_device;
69#endif
70
71	printk("MPC86xx HPCN board from Freescale Semiconductor\n");
72
73#ifdef CONFIG_SMP
74	mpc86xx_smp_init();
75#endif
76
77	fsl_pci_assign_primary();
78
79	swiotlb_detect_4g();
80}
81
82
83static void
84mpc86xx_hpcn_show_cpuinfo(struct seq_file *m)
85{
86	uint svid = mfspr(SPRN_SVR);
87
88	seq_printf(m, "Vendor\t\t: Freescale Semiconductor\n");
89
90	seq_printf(m, "SVR\t\t: 0x%x\n", svid);
91}
92
93
94/*
95 * Called very early, device-tree isn't unflattened
96 */
97static int __init mpc86xx_hpcn_probe(void)
98{
99	unsigned long root = of_get_flat_dt_root();
100
101	if (of_flat_dt_is_compatible(root, "fsl,mpc8641hpcn"))
102		return 1;	/* Looks good */
103
104	/* Be nice and don't give silent boot death.  Delete this in 2.6.27 */
105	if (of_flat_dt_is_compatible(root, "mpc86xx")) {
106		pr_warning("WARNING: your dts/dtb is old. You must update before the next kernel release\n");
107		return 1;
108	}
109
110	return 0;
111}
112
113static long __init
114mpc86xx_time_init(void)
115{
116	unsigned int temp;
117
118	/* Set the time base to zero */
119	mtspr(SPRN_TBWL, 0);
120	mtspr(SPRN_TBWU, 0);
121
122	temp = mfspr(SPRN_HID0);
123	temp |= HID0_TBEN;
124	mtspr(SPRN_HID0, temp);
125	asm volatile("isync");
126
127	return 0;
128}
129
130static const struct of_device_id of_bus_ids[] __initconst = {
131	{ .compatible = "simple-bus", },
132	{ .compatible = "fsl,srio", },
133	{ .compatible = "gianfar", },
134	{ .compatible = "fsl,mpc8641-pcie", },
135	{},
136};
137
138static int __init declare_of_platform_devices(void)
139{
140	of_platform_bus_probe(NULL, of_bus_ids, NULL);
141
142	return 0;
143}
144machine_arch_initcall(mpc86xx_hpcn, declare_of_platform_devices);
145machine_arch_initcall(mpc86xx_hpcn, swiotlb_setup_bus_notifier);
146
147define_machine(mpc86xx_hpcn) {
148	.name			= "MPC86xx HPCN",
149	.probe			= mpc86xx_hpcn_probe,
150	.setup_arch		= mpc86xx_hpcn_setup_arch,
151	.init_IRQ		= mpc86xx_init_irq,
152	.show_cpuinfo		= mpc86xx_hpcn_show_cpuinfo,
153	.get_irq		= mpic_get_irq,
154	.restart		= fsl_rstcr_restart,
155	.time_init		= mpc86xx_time_init,
156	.calibrate_decr		= generic_calibrate_decr,
157	.progress		= udbg_progress,
158#ifdef CONFIG_PCI
159	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
160#endif
161};
162