2 * arch/powerpc/platforms/embedded6xx/wii.c
4 * Nintendo Wii board-specific support
5 * Copyright (C) 2008-2009 The GameCube Linux Team
6 * Copyright (C) 2008,2009 Albert Herranz
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.
14 #define DRV_MODULE_NAME "wii"
15 #define pr_fmt(fmt) DRV_MODULE_NAME ": " fmt
17 #include <linux/kernel.h>
18 #include <linux/init.h>
19 #include <linux/irq.h>
20 #include <linux/seq_file.h>
21 #include <linux/kexec.h>
22 #include <linux/of_platform.h>
23 #include <linux/lmb.h>
24 #include <mm/mmu_decl.h>
27 #include <asm/machdep.h>
32 #include "flipper-pic.h"
34 #include "usbgecko_udbg.h"
37 #define HW_CTRL_COMPATIBLE "nintendo,hollywood-control"
39 #define HW_CTRL_RESETS 0x94
40 #define HW_CTRL_RESETS_SYS (1<<0)
43 #define HW_GPIO_COMPATIBLE "nintendo,hollywood-gpio"
45 #define HW_GPIO_BASE(idx) (idx * 0x20)
46 #define HW_GPIO_OUT(idx) (HW_GPIO_BASE(idx) + 0)
47 #define HW_GPIO_DIR(idx) (HW_GPIO_BASE(idx) + 4)
49 #define HW_GPIO_SHUTDOWN (1<<1)
50 #define HW_GPIO_SLOT_LED (1<<5)
51 #define HW_GPIO_SENSOR_BAR (1<<8)
54 static void __iomem *hw_ctrl;
55 static void __iomem *hw_gpio;
57 unsigned long wii_hole_start;
58 unsigned long wii_hole_size;
61 static int __init page_aligned(unsigned long x)
63 return !(x & (PAGE_SIZE-1));
66 void __init wii_memory_fixups(void)
68 struct lmb_property *p = lmb.memory.region;
71 * This is part of a workaround to allow the use of two
72 * discontiguous RAM ranges on the Wii, even if this is
73 * currently unsupported on 32-bit PowerPC Linux.
75 * We coealesce the two memory ranges of the Wii into a
76 * single range, then create a reservation for the "hole"
77 * between both ranges.
80 BUG_ON(lmb.memory.cnt != 2);
81 BUG_ON(!page_aligned(p[0].base) || !page_aligned(p[1].base));
83 p[0].size = _ALIGN_DOWN(p[0].size, PAGE_SIZE);
84 p[1].size = _ALIGN_DOWN(p[1].size, PAGE_SIZE);
86 wii_hole_start = p[0].base + p[0].size;
87 wii_hole_size = p[1].base - wii_hole_start;
89 pr_info("MEM1: <%08llx %08llx>\n", p[0].base, p[0].size);
90 pr_info("HOLE: <%08lx %08lx>\n", wii_hole_start, wii_hole_size);
91 pr_info("MEM2: <%08llx %08llx>\n", p[1].base, p[1].size);
93 p[0].size += wii_hole_size + p[1].size;
98 /* reserve the hole */
99 lmb_reserve(wii_hole_start, wii_hole_size);
102 unsigned long __init wii_mmu_mapin_mem2(unsigned long top)
104 unsigned long delta, size, bl;
105 unsigned long max_size = (256<<20);
107 /* MEM2 64MB@0x10000000 */
108 delta = wii_hole_start + wii_hole_size;
110 for (bl = 128<<10; bl < max_size; bl <<= 1) {
114 setbat(4, PAGE_OFFSET+delta, delta, bl, PAGE_KERNEL_X);
118 static void wii_spin(void)
125 static void __iomem *wii_ioremap_hw_regs(char *name, char *compatible)
127 void __iomem *hw_regs = NULL;
128 struct device_node *np;
132 np = of_find_compatible_node(NULL, NULL, compatible);
134 pr_err("no compatible node found for %s\n", compatible);
137 error = of_address_to_resource(np, 0, &res);
139 pr_err("no valid reg found for %s\n", np->name);
143 hw_regs = ioremap(res.start, resource_size(&res));
145 pr_info("%s at 0x%08x mapped to 0x%p\n", name,
155 static void __init wii_setup_arch(void)
157 hw_ctrl = wii_ioremap_hw_regs("hw_ctrl", HW_CTRL_COMPATIBLE);
158 hw_gpio = wii_ioremap_hw_regs("hw_gpio", HW_GPIO_COMPATIBLE);
160 /* turn off the front blue led and IR light */
161 clrbits32(hw_gpio + HW_GPIO_OUT(0),
162 HW_GPIO_SLOT_LED | HW_GPIO_SENSOR_BAR);
166 static void wii_restart(char *cmd)
171 /* clear the system reset pin to cause a reset */
172 clrbits32(hw_ctrl + HW_CTRL_RESETS, HW_CTRL_RESETS_SYS);
177 static void wii_power_off(void)
182 /* make sure that the poweroff GPIO is configured as output */
183 setbits32(hw_gpio + HW_GPIO_DIR(1), HW_GPIO_SHUTDOWN);
185 /* drive the poweroff GPIO high */
186 setbits32(hw_gpio + HW_GPIO_OUT(1), HW_GPIO_SHUTDOWN);
191 static void wii_halt(void)
194 ppc_md.restart(NULL);
198 static void __init wii_init_early(void)
203 static void __init wii_pic_probe(void)
209 static int __init wii_probe(void)
211 unsigned long dt_root;
213 dt_root = of_get_flat_dt_root();
214 if (!of_flat_dt_is_compatible(dt_root, "nintendo,wii"))
220 static void wii_shutdown(void)
227 static int wii_machine_kexec_prepare(struct kimage *image)
231 #endif /* CONFIG_KEXEC */
233 define_machine(wii) {
236 .init_early = wii_init_early,
237 .setup_arch = wii_setup_arch,
238 .restart = wii_restart,
239 .power_off = wii_power_off,
241 .init_IRQ = wii_pic_probe,
242 .get_irq = flipper_pic_get_irq,
243 .calibrate_decr = generic_calibrate_decr,
244 .progress = udbg_progress,
245 .machine_shutdown = wii_shutdown,
247 .machine_kexec_prepare = wii_machine_kexec_prepare,
251 static struct of_device_id wii_of_bus[] = {
252 { .compatible = "nintendo,hollywood", },
256 static int __init wii_device_probe(void)
258 if (!machine_is(wii))
261 of_platform_bus_probe(NULL, wii_of_bus, NULL);
264 device_initcall(wii_device_probe);