1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
/*
* Currituck board specific routines
*
* Copyright © 2011 Tony Breeds IBM Corporation
*
* Based on earlier code:
* Matt Porter <mporter@kernel.crashing.org>
* Copyright 2002-2005 MontaVista Software Inc.
*
* Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
* Copyright (c) 2003-2005 Zultys Technologies
*
* Rewritten and ported to the merged powerpc tree:
* Copyright 2007 David Gibson <dwg@au1.ibm.com>, IBM Corporation.
* Copyright © 2011 David Kliekamp IBM Corporation
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/init.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/rtc.h>
#include <asm/machdep.h>
#include <asm/prom.h>
#include <asm/udbg.h>
#include <asm/time.h>
#include <asm/uic.h>
#include <asm/ppc4xx.h>
#include <asm/mpic.h>
#include <asm/mmu.h>
#include <linux/pci.h>
static __initdata struct of_device_id ppc47x_of_bus[] = {
{ .compatible = "ibm,plb4", },
{ .compatible = "ibm,plb6", },
{ .compatible = "ibm,opb", },
{ .compatible = "ibm,ebc", },
{},
};
/* The EEPROM is missing and the default values are bogus. This forces USB in
* to EHCI mode */
static void __devinit quirk_ppc_currituck_usb_fixup(struct pci_dev *dev)
{
if (of_machine_is_compatible("ibm,currituck")) {
pci_write_config_dword(dev, 0xe0, 0x0114231f);
pci_write_config_dword(dev, 0xe4, 0x00006c40);
}
}
DECLARE_PCI_FIXUP_HEADER(0x1033, 0x0035, quirk_ppc_currituck_usb_fixup);
static int __init ppc47x_device_probe(void)
{
of_platform_bus_probe(NULL, ppc47x_of_bus, NULL);
return 0;
}
machine_device_initcall(ppc47x, ppc47x_device_probe);
/* We can have either UICs or MPICs */
static void __init ppc47x_init_irq(void)
{
struct device_node *np;
/* Find top level interrupt controller */
for_each_node_with_property(np, "interrupt-controller") {
if (of_get_property(np, "interrupts", NULL) == NULL)
break;
}
if (np == NULL)
panic("Can't find top level interrupt controller");
/* Check type and do appropriate initialization */
if (of_device_is_compatible(np, "chrp,open-pic")) {
/* The MPIC driver will get everything it needs from the
* device-tree, just pass 0 to all arguments
*/
struct mpic *mpic =
mpic_alloc(np, 0, MPIC_NO_RESET, 0, 0, " MPIC ");
BUG_ON(mpic == NULL);
mpic_init(mpic);
ppc_md.get_irq = mpic_get_irq;
} else
panic("Unrecognized top level interrupt controller");
}
#ifdef CONFIG_SMP
static void __cpuinit smp_ppc47x_setup_cpu(int cpu)
{
mpic_setup_this_cpu();
}
static int __cpuinit smp_ppc47x_kick_cpu(int cpu)
{
struct device_node *cpunode = of_get_cpu_node(cpu, NULL);
const u64 *spin_table_addr_prop;
u32 *spin_table;
extern void start_secondary_47x(void);
BUG_ON(cpunode == NULL);
/* Assume spin table. We could test for the enable-method in
* the device-tree but currently there's little point as it's
* our only supported method
*/
spin_table_addr_prop =
of_get_property(cpunode, "cpu-release-addr", NULL);
if (spin_table_addr_prop == NULL) {
pr_err("CPU%d: Can't start, missing cpu-release-addr !\n",
cpu);
return 1;
}
/* Assume it's mapped as part of the linear mapping. This is a bit
* fishy but will work fine for now
*
* XXX: Is there any reason to assume differently?
*/
spin_table = (u32 *)__va(*spin_table_addr_prop);
pr_debug("CPU%d: Spin table mapped at %p\n", cpu, spin_table);
spin_table[3] = cpu;
smp_wmb();
spin_table[1] = __pa(start_secondary_47x);
mb();
return 0;
}
static struct smp_ops_t ppc47x_smp_ops = {
.probe = smp_mpic_probe,
.message_pass = smp_mpic_message_pass,
.setup_cpu = smp_ppc47x_setup_cpu,
.kick_cpu = smp_ppc47x_kick_cpu,
.give_timebase = smp_generic_give_timebase,
.take_timebase = smp_generic_take_timebase,
};
static void __init ppc47x_smp_init(void)
{
if (mmu_has_feature(MMU_FTR_TYPE_47x))
smp_ops = &ppc47x_smp_ops;
}
#else /* CONFIG_SMP */
static void __init ppc47x_smp_init(void) { }
#endif /* CONFIG_SMP */
static void __init ppc47x_setup_arch(void)
{
/* No need to check the DMA config as we /know/ our windows are all of
* RAM. Lets hope that doesn't change */
swiotlb_detect_4g();
ppc47x_smp_init();
}
/*
* Called very early, MMU is off, device-tree isn't unflattened
*/
static int __init ppc47x_probe(void)
{
unsigned long root = of_get_flat_dt_root();
if (!of_flat_dt_is_compatible(root, "ibm,currituck"))
return 0;
return 1;
}
/* Use USB controller should have been hardware swizzled but it wasn't :( */
static void ppc47x_pci_irq_fixup(struct pci_dev *dev)
{
if (dev->vendor == 0x1033 && (dev->device == 0x0035 ||
dev->device == 0x00e0)) {
dev->irq = irq_create_mapping(NULL, 47);
pr_info("%s: Mapping irq 47 %d\n", __func__, dev->irq);
}
}
define_machine(ppc47x) {
.name = "PowerPC 47x",
.probe = ppc47x_probe,
.progress = udbg_progress,
.init_IRQ = ppc47x_init_irq,
.setup_arch = ppc47x_setup_arch,
.pci_irq_fixup = ppc47x_pci_irq_fixup,
.restart = ppc4xx_reset_system,
.calibrate_decr = generic_calibrate_decr,
};
|
