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/of_platform.h>
22 #include <linux/memblock.h>
23 #include <mm/mmu_decl.h>
26 #include <asm/machdep.h>
31 #include "flipper-pic.h"
33 #include "usbgecko_udbg.h"
36 #define HW_CTRL_COMPATIBLE "nintendo,hollywood-control"
38 #define HW_CTRL_RESETS 0x94
39 #define HW_CTRL_RESETS_SYS (1<<0)
42 #define HW_GPIO_COMPATIBLE "nintendo,hollywood-gpio"
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 #define HW_GPIO_OWNER (HW_GPIO_BASE(1) + 0x1c)
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 memblock_region *p = memblock.memory.regions;
71 * This is part of a workaround to allow the use of two
72 * discontinuous RAM ranges on the Wii, even if this is
73 * currently unsupported on 32-bit PowerPC Linux.
75 * We coalesce 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(memblock.memory.cnt != 2);
81 BUG_ON(!page_aligned(p[0].base) || !page_aligned(p[1].base));
84 wii_hole_start = ALIGN(p[0].base + p[0].size, PAGE_SIZE);
85 wii_hole_size = p[1].base - wii_hole_start;
88 unsigned long __init wii_mmu_mapin_mem2(unsigned long top)
90 unsigned long delta, size, bl;
91 unsigned long max_size = (256<<20);
93 /* MEM2 64MB@0x10000000 */
94 delta = wii_hole_start + wii_hole_size;
96 for (bl = 128<<10; bl < max_size; bl <<= 1) {
100 setbat(4, PAGE_OFFSET+delta, delta, bl, PAGE_KERNEL_X);
104 static void __noreturn wii_spin(void)
111 static void __iomem *wii_ioremap_hw_regs(char *name, char *compatible)
113 void __iomem *hw_regs = NULL;
114 struct device_node *np;
118 np = of_find_compatible_node(NULL, NULL, compatible);
120 pr_err("no compatible node found for %s\n", compatible);
123 error = of_address_to_resource(np, 0, &res);
125 pr_err("no valid reg found for %s\n", np->name);
129 hw_regs = ioremap(res.start, resource_size(&res));
131 pr_info("%s at 0x%08x mapped to 0x%p\n", name,
141 static void __init wii_setup_arch(void)
143 hw_ctrl = wii_ioremap_hw_regs("hw_ctrl", HW_CTRL_COMPATIBLE);
144 hw_gpio = wii_ioremap_hw_regs("hw_gpio", HW_GPIO_COMPATIBLE);
146 /* turn off the front blue led and IR light */
147 clrbits32(hw_gpio + HW_GPIO_OUT(0),
148 HW_GPIO_SLOT_LED | HW_GPIO_SENSOR_BAR);
152 static void __noreturn wii_restart(char *cmd)
157 /* clear the system reset pin to cause a reset */
158 clrbits32(hw_ctrl + HW_CTRL_RESETS, HW_CTRL_RESETS_SYS);
163 static void wii_power_off(void)
169 * set the owner of the shutdown pin to ARM, because it is
170 * accessed through the registers for the ARM, below
172 clrbits32(hw_gpio + HW_GPIO_OWNER, HW_GPIO_SHUTDOWN);
174 /* make sure that the poweroff GPIO is configured as output */
175 setbits32(hw_gpio + HW_GPIO_DIR(1), HW_GPIO_SHUTDOWN);
177 /* drive the poweroff GPIO high */
178 setbits32(hw_gpio + HW_GPIO_OUT(1), HW_GPIO_SHUTDOWN);
183 static void __noreturn wii_halt(void)
186 ppc_md.restart(NULL);
190 static void __init wii_pic_probe(void)
196 static int __init wii_probe(void)
198 if (!of_machine_is_compatible("nintendo,wii"))
201 pm_power_off = wii_power_off;
208 static void wii_shutdown(void)
214 define_machine(wii) {
217 .setup_arch = wii_setup_arch,
218 .restart = wii_restart,
220 .init_IRQ = wii_pic_probe,
221 .get_irq = flipper_pic_get_irq,
222 .calibrate_decr = generic_calibrate_decr,
223 .progress = udbg_progress,
224 .machine_shutdown = wii_shutdown,
227 static const struct of_device_id wii_of_bus[] = {
228 { .compatible = "nintendo,hollywood", },
232 static int __init wii_device_probe(void)
234 if (!machine_is(wii))
237 of_platform_populate(NULL, wii_of_bus, NULL, NULL);
240 device_initcall(wii_device_probe);