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#include <linux/memblock.h>
23
24#include <asm/time.h>
25#include <asm/machdep.h>
26#include <asm/pci-bridge.h>
27#include <asm/prom.h>
28#include <mm/mmu_decl.h>
29#include <asm/udbg.h>
30#include <asm/swiotlb.h>
31
32#include <asm/mpic.h>
33
34#include <sysdev/fsl_pci.h>
35#include <sysdev/fsl_soc.h>
36
37#include "mpc86xx.h"
38
39#undef DEBUG
40
41#ifdef DEBUG
42#define DBG(fmt...) do { printk(KERN_ERR fmt); } while(0)
43#else
44#define DBG(fmt...) do { } while(0)
45#endif
46
47#ifdef CONFIG_PCI
48extern int uli_exclude_device(struct pci_controller *hose,
49				u_char bus, u_char devfn);
50
51static int mpc86xx_exclude_device(struct pci_controller *hose,
52				   u_char bus, u_char devfn)
53{
54	struct device_node* node;
55	struct resource rsrc;
56
57	node = hose->dn;
58	of_address_to_resource(node, 0, &rsrc);
59
60	if ((rsrc.start & 0xfffff) == 0x8000) {
61		return uli_exclude_device(hose, bus, devfn);
62	}
63
64	return PCIBIOS_SUCCESSFUL;
65}
66#endif /* CONFIG_PCI */
67
68
69static void __init
70mpc86xx_hpcn_setup_arch(void)
71{
72#ifdef CONFIG_PCI
73	struct device_node *np;
74	struct pci_controller *hose;
75#endif
76	dma_addr_t max = 0xffffffff;
77
78	if (ppc_md.progress)
79		ppc_md.progress("mpc86xx_hpcn_setup_arch()", 0);
80
81#ifdef CONFIG_PCI
82	for_each_compatible_node(np, "pci", "fsl,mpc8641-pcie") {
83		struct resource rsrc;
84		of_address_to_resource(np, 0, &rsrc);
85		if ((rsrc.start & 0xfffff) == 0x8000)
86			fsl_add_bridge(np, 1);
87		else
88			fsl_add_bridge(np, 0);
89		hose = pci_find_hose_for_OF_device(np);
90		max = min(max, hose->dma_window_base_cur +
91			  hose->dma_window_size);
92	}
93
94	ppc_md.pci_exclude_device = mpc86xx_exclude_device;
95
96#endif
97
98	printk("MPC86xx HPCN board from Freescale Semiconductor\n");
99
100#ifdef CONFIG_SMP
101	mpc86xx_smp_init();
102#endif
103
104#ifdef CONFIG_SWIOTLB
105	if (memblock_end_of_DRAM() > max) {
106		ppc_swiotlb_enable = 1;
107		set_pci_dma_ops(&swiotlb_dma_ops);
108		ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
109	}
110#endif
111}
112
113
114static void
115mpc86xx_hpcn_show_cpuinfo(struct seq_file *m)
116{
117	uint svid = mfspr(SPRN_SVR);
118
119	seq_printf(m, "Vendor\t\t: Freescale Semiconductor\n");
120
121	seq_printf(m, "SVR\t\t: 0x%x\n", svid);
122}
123
124
125/*
126 * Called very early, device-tree isn't unflattened
127 */
128static int __init mpc86xx_hpcn_probe(void)
129{
130	unsigned long root = of_get_flat_dt_root();
131
132	if (of_flat_dt_is_compatible(root, "fsl,mpc8641hpcn"))
133		return 1;	/* Looks good */
134
135	/* Be nice and don't give silent boot death.  Delete this in 2.6.27 */
136	if (of_flat_dt_is_compatible(root, "mpc86xx")) {
137		pr_warning("WARNING: your dts/dtb is old. You must update before the next kernel release\n");
138		return 1;
139	}
140
141	return 0;
142}
143
144static long __init
145mpc86xx_time_init(void)
146{
147	unsigned int temp;
148
149	/* Set the time base to zero */
150	mtspr(SPRN_TBWL, 0);
151	mtspr(SPRN_TBWU, 0);
152
153	temp = mfspr(SPRN_HID0);
154	temp |= HID0_TBEN;
155	mtspr(SPRN_HID0, temp);
156	asm volatile("isync");
157
158	return 0;
159}
160
161static __initdata struct of_device_id of_bus_ids[] = {
162	{ .compatible = "simple-bus", },
163	{ .compatible = "fsl,srio", },
164	{ .compatible = "gianfar", },
165	{},
166};
167
168static int __init declare_of_platform_devices(void)
169{
170	of_platform_bus_probe(NULL, of_bus_ids, NULL);
171
172	return 0;
173}
174machine_device_initcall(mpc86xx_hpcn, declare_of_platform_devices);
175machine_arch_initcall(mpc86xx_hpcn, swiotlb_setup_bus_notifier);
176
177define_machine(mpc86xx_hpcn) {
178	.name			= "MPC86xx HPCN",
179	.probe			= mpc86xx_hpcn_probe,
180	.setup_arch		= mpc86xx_hpcn_setup_arch,
181	.init_IRQ		= mpc86xx_init_irq,
182	.show_cpuinfo		= mpc86xx_hpcn_show_cpuinfo,
183	.get_irq		= mpic_get_irq,
184	.restart		= fsl_rstcr_restart,
185	.time_init		= mpc86xx_time_init,
186	.calibrate_decr		= generic_calibrate_decr,
187	.progress		= udbg_progress,
188#ifdef CONFIG_PCI
189	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
190#endif
191};
192