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
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
|
/*
* arch/powerpc/platforms/embedded6xx/wii.c
*
* Nintendo Wii board-specific support
* Copyright (C) 2008-2009 The GameCube Linux Team
* Copyright (C) 2008,2009 Albert Herranz
*
* 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.
*
*/
#define DRV_MODULE_NAME "wii"
#define pr_fmt(fmt) DRV_MODULE_NAME ": " fmt
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/seq_file.h>
#include <linux/of_platform.h>
#include <linux/memblock.h>
#include <mm/mmu_decl.h>
#include <asm/io.h>
#include <asm/machdep.h>
#include <asm/prom.h>
#include <asm/time.h>
#include <asm/udbg.h>
#include "flipper-pic.h"
#include "hlwd-pic.h"
#include "usbgecko_udbg.h"
/* control block */
#define HW_CTRL_COMPATIBLE "nintendo,hollywood-control"
#define HW_CTRL_RESETS 0x94
#define HW_CTRL_RESETS_SYS (1<<0)
/* gpio */
#define HW_GPIO_COMPATIBLE "nintendo,hollywood-gpio"
#define HW_GPIO_BASE(idx) (idx * 0x20)
#define HW_GPIO_OUT(idx) (HW_GPIO_BASE(idx) + 0)
#define HW_GPIO_DIR(idx) (HW_GPIO_BASE(idx) + 4)
#define HW_GPIO_OWNER (HW_GPIO_BASE(1) + 0x1c)
#define HW_GPIO_SHUTDOWN (1<<1)
#define HW_GPIO_SLOT_LED (1<<5)
#define HW_GPIO_SENSOR_BAR (1<<8)
static void __iomem *hw_ctrl;
static void __iomem *hw_gpio;
unsigned long wii_hole_start;
unsigned long wii_hole_size;
static int __init page_aligned(unsigned long x)
{
return !(x & (PAGE_SIZE-1));
}
void __init wii_memory_fixups(void)
{
struct memblock_region *p = memblock.memory.regions;
BUG_ON(memblock.memory.cnt != 2);
BUG_ON(!page_aligned(p[0].base) || !page_aligned(p[1].base));
/* determine hole */
wii_hole_start = ALIGN(p[0].base + p[0].size, PAGE_SIZE);
wii_hole_size = p[1].base - wii_hole_start;
}
unsigned long __init wii_mmu_mapin_mem2(unsigned long top)
{
unsigned long delta, size, bl;
unsigned long max_size = (256<<20);
/* MEM2 64MB@0x10000000 */
delta = wii_hole_start + wii_hole_size;
size = top - delta;
if (__map_without_bats)
return delta;
for (bl = 128<<10; bl < max_size; bl <<= 1) {
if (bl * 2 > size)
break;
}
setbat(4, PAGE_OFFSET+delta, delta, bl, PAGE_KERNEL_X);
return delta + bl;
}
static void __noreturn wii_spin(void)
{
local_irq_disable();
for (;;)
cpu_relax();
}
static void __iomem *wii_ioremap_hw_regs(char *name, char *compatible)
{
void __iomem *hw_regs = NULL;
struct device_node *np;
struct resource res;
int error = -ENODEV;
np = of_find_compatible_node(NULL, NULL, compatible);
if (!np) {
pr_err("no compatible node found for %s\n", compatible);
goto out;
}
error = of_address_to_resource(np, 0, &res);
if (error) {
pr_err("no valid reg found for %s\n", np->name);
goto out_put;
}
hw_regs = ioremap(res.start, resource_size(&res));
if (hw_regs) {
pr_info("%s at 0x%pa mapped to 0x%p\n", name,
&res.start, hw_regs);
}
out_put:
of_node_put(np);
out:
return hw_regs;
}
static void __init wii_setup_arch(void)
{
hw_ctrl = wii_ioremap_hw_regs("hw_ctrl", HW_CTRL_COMPATIBLE);
hw_gpio = wii_ioremap_hw_regs("hw_gpio", HW_GPIO_COMPATIBLE);
if (hw_gpio) {
/* turn off the front blue led and IR light */
clrbits32(hw_gpio + HW_GPIO_OUT(0),
HW_GPIO_SLOT_LED | HW_GPIO_SENSOR_BAR);
}
}
static void __noreturn wii_restart(char *cmd)
{
local_irq_disable();
if (hw_ctrl) {
/* clear the system reset pin to cause a reset */
clrbits32(hw_ctrl + HW_CTRL_RESETS, HW_CTRL_RESETS_SYS);
}
wii_spin();
}
static void wii_power_off(void)
{
local_irq_disable();
if (hw_gpio) {
/*
* set the owner of the shutdown pin to ARM, because it is
* accessed through the registers for the ARM, below
*/
clrbits32(hw_gpio + HW_GPIO_OWNER, HW_GPIO_SHUTDOWN);
/* make sure that the poweroff GPIO is configured as output */
setbits32(hw_gpio + HW_GPIO_DIR(1), HW_GPIO_SHUTDOWN);
/* drive the poweroff GPIO high */
setbits32(hw_gpio + HW_GPIO_OUT(1), HW_GPIO_SHUTDOWN);
}
wii_spin();
}
static void __noreturn wii_halt(void)
{
if (ppc_md.restart)
ppc_md.restart(NULL);
wii_spin();
}
static void __init wii_pic_probe(void)
{
flipper_pic_probe();
hlwd_pic_probe();
}
static int __init wii_probe(void)
{
if (!of_machine_is_compatible("nintendo,wii"))
return 0;
pm_power_off = wii_power_off;
ug_udbg_init();
return 1;
}
static void wii_shutdown(void)
{
hlwd_quiesce();
flipper_quiesce();
}
define_machine(wii) {
.name = "wii",
.probe = wii_probe,
.setup_arch = wii_setup_arch,
.restart = wii_restart,
.halt = wii_halt,
.init_IRQ = wii_pic_probe,
.get_irq = flipper_pic_get_irq,
.calibrate_decr = generic_calibrate_decr,
.progress = udbg_progress,
.machine_shutdown = wii_shutdown,
};
static const struct of_device_id wii_of_bus[] = {
{ .compatible = "nintendo,hollywood", },
{ },
};
static int __init wii_device_probe(void)
{
if (!machine_is(wii))
return 0;
of_platform_populate(NULL, wii_of_bus, NULL, NULL);
return 0;
}
device_initcall(wii_device_probe);
|
