Commit | Line | Data |
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5a7ee319 AH |
1 | /* |
2 | * arch/powerpc/platforms/embedded6xx/wii.c | |
3 | * | |
4 | * Nintendo Wii board-specific support | |
5 | * Copyright (C) 2008-2009 The GameCube Linux Team | |
6 | * Copyright (C) 2008,2009 Albert Herranz | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * as published by the Free Software Foundation; either version 2 | |
11 | * of the License, or (at your option) any later version. | |
12 | * | |
13 | */ | |
14 | #define DRV_MODULE_NAME "wii" | |
15 | #define pr_fmt(fmt) DRV_MODULE_NAME ": " fmt | |
16 | ||
17 | #include <linux/kernel.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/irq.h> | |
20 | #include <linux/seq_file.h> | |
5a7ee319 | 21 | #include <linux/of_platform.h> |
95f72d1e | 22 | #include <linux/memblock.h> |
de32400d | 23 | #include <mm/mmu_decl.h> |
5a7ee319 AH |
24 | |
25 | #include <asm/io.h> | |
26 | #include <asm/machdep.h> | |
27 | #include <asm/prom.h> | |
28 | #include <asm/time.h> | |
29 | #include <asm/udbg.h> | |
30 | ||
31 | #include "flipper-pic.h" | |
32 | #include "hlwd-pic.h" | |
33 | #include "usbgecko_udbg.h" | |
34 | ||
35 | /* control block */ | |
36 | #define HW_CTRL_COMPATIBLE "nintendo,hollywood-control" | |
37 | ||
38 | #define HW_CTRL_RESETS 0x94 | |
39 | #define HW_CTRL_RESETS_SYS (1<<0) | |
40 | ||
41 | /* gpio */ | |
42 | #define HW_GPIO_COMPATIBLE "nintendo,hollywood-gpio" | |
43 | ||
44 | #define HW_GPIO_BASE(idx) (idx * 0x20) | |
45 | #define HW_GPIO_OUT(idx) (HW_GPIO_BASE(idx) + 0) | |
46 | #define HW_GPIO_DIR(idx) (HW_GPIO_BASE(idx) + 4) | |
47 | ||
48 | #define HW_GPIO_SHUTDOWN (1<<1) | |
49 | #define HW_GPIO_SLOT_LED (1<<5) | |
50 | #define HW_GPIO_SENSOR_BAR (1<<8) | |
51 | ||
52 | ||
53 | static void __iomem *hw_ctrl; | |
54 | static void __iomem *hw_gpio; | |
55 | ||
de32400d AH |
56 | unsigned long wii_hole_start; |
57 | unsigned long wii_hole_size; | |
58 | ||
59 | ||
60 | static int __init page_aligned(unsigned long x) | |
61 | { | |
62 | return !(x & (PAGE_SIZE-1)); | |
63 | } | |
64 | ||
65 | void __init wii_memory_fixups(void) | |
66 | { | |
823108a0 | 67 | struct memblock_region *p = memblock.memory.regions; |
de32400d AH |
68 | |
69 | /* | |
70 | * This is part of a workaround to allow the use of two | |
c4b9f9a9 | 71 | * discontinuous RAM ranges on the Wii, even if this is |
de32400d AH |
72 | * currently unsupported on 32-bit PowerPC Linux. |
73 | * | |
c4b9f9a9 | 74 | * We coalesce the two memory ranges of the Wii into a |
de32400d AH |
75 | * single range, then create a reservation for the "hole" |
76 | * between both ranges. | |
77 | */ | |
78 | ||
95f72d1e | 79 | BUG_ON(memblock.memory.cnt != 2); |
de32400d AH |
80 | BUG_ON(!page_aligned(p[0].base) || !page_aligned(p[1].base)); |
81 | ||
6fbef13c TH |
82 | /* trim unaligned tail */ |
83 | memblock_remove(ALIGN(p[1].base + p[1].size, PAGE_SIZE), | |
84 | (phys_addr_t)ULLONG_MAX); | |
de32400d | 85 | |
6fbef13c TH |
86 | /* determine hole, add & reserve them */ |
87 | wii_hole_start = ALIGN(p[0].base + p[0].size, PAGE_SIZE); | |
de32400d | 88 | wii_hole_size = p[1].base - wii_hole_start; |
6fbef13c TH |
89 | memblock_add(wii_hole_start, wii_hole_size); |
90 | memblock_reserve(wii_hole_start, wii_hole_size); | |
de32400d | 91 | |
6fbef13c TH |
92 | BUG_ON(memblock.memory.cnt != 1); |
93 | __memblock_dump_all(); | |
c0577eee AH |
94 | |
95 | /* allow ioremapping the address space in the hole */ | |
96 | __allow_ioremap_reserved = 1; | |
de32400d AH |
97 | } |
98 | ||
99 | unsigned long __init wii_mmu_mapin_mem2(unsigned long top) | |
100 | { | |
101 | unsigned long delta, size, bl; | |
102 | unsigned long max_size = (256<<20); | |
103 | ||
104 | /* MEM2 64MB@0x10000000 */ | |
105 | delta = wii_hole_start + wii_hole_size; | |
106 | size = top - delta; | |
107 | for (bl = 128<<10; bl < max_size; bl <<= 1) { | |
108 | if (bl * 2 > size) | |
109 | break; | |
110 | } | |
111 | setbat(4, PAGE_OFFSET+delta, delta, bl, PAGE_KERNEL_X); | |
112 | return delta + bl; | |
113 | } | |
114 | ||
5a7ee319 AH |
115 | static void wii_spin(void) |
116 | { | |
117 | local_irq_disable(); | |
118 | for (;;) | |
119 | cpu_relax(); | |
120 | } | |
121 | ||
122 | static void __iomem *wii_ioremap_hw_regs(char *name, char *compatible) | |
123 | { | |
124 | void __iomem *hw_regs = NULL; | |
125 | struct device_node *np; | |
126 | struct resource res; | |
127 | int error = -ENODEV; | |
128 | ||
129 | np = of_find_compatible_node(NULL, NULL, compatible); | |
130 | if (!np) { | |
131 | pr_err("no compatible node found for %s\n", compatible); | |
132 | goto out; | |
133 | } | |
134 | error = of_address_to_resource(np, 0, &res); | |
135 | if (error) { | |
136 | pr_err("no valid reg found for %s\n", np->name); | |
137 | goto out_put; | |
138 | } | |
139 | ||
140 | hw_regs = ioremap(res.start, resource_size(&res)); | |
141 | if (hw_regs) { | |
142 | pr_info("%s at 0x%08x mapped to 0x%p\n", name, | |
143 | res.start, hw_regs); | |
144 | } | |
145 | ||
146 | out_put: | |
147 | of_node_put(np); | |
148 | out: | |
149 | return hw_regs; | |
150 | } | |
151 | ||
152 | static void __init wii_setup_arch(void) | |
153 | { | |
154 | hw_ctrl = wii_ioremap_hw_regs("hw_ctrl", HW_CTRL_COMPATIBLE); | |
155 | hw_gpio = wii_ioremap_hw_regs("hw_gpio", HW_GPIO_COMPATIBLE); | |
156 | if (hw_gpio) { | |
157 | /* turn off the front blue led and IR light */ | |
158 | clrbits32(hw_gpio + HW_GPIO_OUT(0), | |
159 | HW_GPIO_SLOT_LED | HW_GPIO_SENSOR_BAR); | |
160 | } | |
161 | } | |
162 | ||
163 | static void wii_restart(char *cmd) | |
164 | { | |
165 | local_irq_disable(); | |
166 | ||
167 | if (hw_ctrl) { | |
168 | /* clear the system reset pin to cause a reset */ | |
169 | clrbits32(hw_ctrl + HW_CTRL_RESETS, HW_CTRL_RESETS_SYS); | |
170 | } | |
171 | wii_spin(); | |
172 | } | |
173 | ||
174 | static void wii_power_off(void) | |
175 | { | |
176 | local_irq_disable(); | |
177 | ||
178 | if (hw_gpio) { | |
179 | /* make sure that the poweroff GPIO is configured as output */ | |
180 | setbits32(hw_gpio + HW_GPIO_DIR(1), HW_GPIO_SHUTDOWN); | |
181 | ||
182 | /* drive the poweroff GPIO high */ | |
183 | setbits32(hw_gpio + HW_GPIO_OUT(1), HW_GPIO_SHUTDOWN); | |
184 | } | |
185 | wii_spin(); | |
186 | } | |
187 | ||
188 | static void wii_halt(void) | |
189 | { | |
190 | if (ppc_md.restart) | |
191 | ppc_md.restart(NULL); | |
192 | wii_spin(); | |
193 | } | |
194 | ||
195 | static void __init wii_init_early(void) | |
196 | { | |
197 | ug_udbg_init(); | |
198 | } | |
199 | ||
200 | static void __init wii_pic_probe(void) | |
201 | { | |
202 | flipper_pic_probe(); | |
203 | hlwd_pic_probe(); | |
204 | } | |
205 | ||
206 | static int __init wii_probe(void) | |
207 | { | |
208 | unsigned long dt_root; | |
209 | ||
210 | dt_root = of_get_flat_dt_root(); | |
211 | if (!of_flat_dt_is_compatible(dt_root, "nintendo,wii")) | |
212 | return 0; | |
213 | ||
9178ba29 AG |
214 | pm_power_off = wii_power_off; |
215 | ||
5a7ee319 AH |
216 | return 1; |
217 | } | |
218 | ||
219 | static void wii_shutdown(void) | |
220 | { | |
221 | hlwd_quiesce(); | |
222 | flipper_quiesce(); | |
223 | } | |
224 | ||
5a7ee319 AH |
225 | define_machine(wii) { |
226 | .name = "wii", | |
227 | .probe = wii_probe, | |
228 | .init_early = wii_init_early, | |
229 | .setup_arch = wii_setup_arch, | |
230 | .restart = wii_restart, | |
5a7ee319 AH |
231 | .halt = wii_halt, |
232 | .init_IRQ = wii_pic_probe, | |
233 | .get_irq = flipper_pic_get_irq, | |
234 | .calibrate_decr = generic_calibrate_decr, | |
235 | .progress = udbg_progress, | |
236 | .machine_shutdown = wii_shutdown, | |
5a7ee319 AH |
237 | }; |
238 | ||
ce6d73c9 | 239 | static const struct of_device_id wii_of_bus[] = { |
5a7ee319 AH |
240 | { .compatible = "nintendo,hollywood", }, |
241 | { }, | |
242 | }; | |
243 | ||
244 | static int __init wii_device_probe(void) | |
245 | { | |
246 | if (!machine_is(wii)) | |
247 | return 0; | |
248 | ||
249 | of_platform_bus_probe(NULL, wii_of_bus, NULL); | |
250 | return 0; | |
251 | } | |
252 | device_initcall(wii_device_probe); | |
253 |