1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * arch/powerpc/platforms/embedded6xx/wii.c
5 * Nintendo Wii board-specific support
6 * Copyright (C) 2008-2009 The GameCube Linux Team
7 * Copyright (C) 2008,2009 Albert Herranz
9 #define DRV_MODULE_NAME "wii"
10 #define pr_fmt(fmt) DRV_MODULE_NAME ": " fmt
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/irq.h>
15 #include <linux/seq_file.h>
16 #include <linux/of_address.h>
17 #include <linux/of_platform.h>
20 #include <asm/machdep.h>
24 #include "flipper-pic.h"
26 #include "usbgecko_udbg.h"
29 #define HW_CTRL_COMPATIBLE "nintendo,hollywood-control"
31 #define HW_CTRL_RESETS 0x94
32 #define HW_CTRL_RESETS_SYS (1<<0)
35 #define HW_GPIO_COMPATIBLE "nintendo,hollywood-gpio"
37 #define HW_GPIO_BASE(idx) (idx * 0x20)
38 #define HW_GPIO_OUT(idx) (HW_GPIO_BASE(idx) + 0)
39 #define HW_GPIO_DIR(idx) (HW_GPIO_BASE(idx) + 4)
40 #define HW_GPIO_OWNER (HW_GPIO_BASE(1) + 0x1c)
42 #define HW_GPIO_SHUTDOWN (1<<1)
43 #define HW_GPIO_SLOT_LED (1<<5)
44 #define HW_GPIO_SENSOR_BAR (1<<8)
47 static void __iomem *hw_ctrl;
48 static void __iomem *hw_gpio;
50 static void __noreturn wii_spin(void)
57 static void __iomem *__init wii_ioremap_hw_regs(char *name, char *compatible)
59 void __iomem *hw_regs = NULL;
60 struct device_node *np;
64 np = of_find_compatible_node(NULL, NULL, compatible);
66 pr_err("no compatible node found for %s\n", compatible);
69 error = of_address_to_resource(np, 0, &res);
71 pr_err("no valid reg found for %pOFn\n", np);
75 hw_regs = ioremap(res.start, resource_size(&res));
77 pr_info("%s at 0x%pa mapped to 0x%p\n", name,
87 static void __init wii_setup_arch(void)
89 hw_ctrl = wii_ioremap_hw_regs("hw_ctrl", HW_CTRL_COMPATIBLE);
90 hw_gpio = wii_ioremap_hw_regs("hw_gpio", HW_GPIO_COMPATIBLE);
92 /* turn off the front blue led and IR light */
93 clrbits32(hw_gpio + HW_GPIO_OUT(0),
94 HW_GPIO_SLOT_LED | HW_GPIO_SENSOR_BAR);
98 static void __noreturn wii_restart(char *cmd)
103 /* clear the system reset pin to cause a reset */
104 clrbits32(hw_ctrl + HW_CTRL_RESETS, HW_CTRL_RESETS_SYS);
109 static void wii_power_off(void)
115 * set the owner of the shutdown pin to ARM, because it is
116 * accessed through the registers for the ARM, below
118 clrbits32(hw_gpio + HW_GPIO_OWNER, HW_GPIO_SHUTDOWN);
120 /* make sure that the poweroff GPIO is configured as output */
121 setbits32(hw_gpio + HW_GPIO_DIR(1), HW_GPIO_SHUTDOWN);
123 /* drive the poweroff GPIO high */
124 setbits32(hw_gpio + HW_GPIO_OUT(1), HW_GPIO_SHUTDOWN);
129 static void __noreturn wii_halt(void)
132 ppc_md.restart(NULL);
136 static void __init wii_pic_probe(void)
142 static int __init wii_probe(void)
144 pm_power_off = wii_power_off;
151 static void wii_shutdown(void)
157 static const struct of_device_id wii_of_bus[] = {
158 { .compatible = "nintendo,hollywood", },
162 static int __init wii_device_probe(void)
164 of_platform_populate(NULL, wii_of_bus, NULL, NULL);
167 machine_device_initcall(wii, wii_device_probe);
169 define_machine(wii) {
171 .compatible = "nintendo,wii",
173 .setup_arch = wii_setup_arch,
174 .restart = wii_restart,
176 .init_IRQ = wii_pic_probe,
177 .get_irq = flipper_pic_get_irq,
178 .progress = udbg_progress,
179 .machine_shutdown = wii_shutdown,