diff options
Diffstat (limited to 'arch/powerpc/platforms/embedded6xx/wii.c')
| -rw-r--r-- | arch/powerpc/platforms/embedded6xx/wii.c | 134 |
1 files changed, 31 insertions, 103 deletions
diff --git a/arch/powerpc/platforms/embedded6xx/wii.c b/arch/powerpc/platforms/embedded6xx/wii.c index 6d8dadf19f0b..cb3be6d6e339 100644 --- a/arch/powerpc/platforms/embedded6xx/wii.c +++ b/arch/powerpc/platforms/embedded6xx/wii.c @@ -1,15 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * 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 @@ -18,13 +13,11 @@ #include <linux/init.h> #include <linux/irq.h> #include <linux/seq_file.h> +#include <linux/of_address.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> @@ -44,6 +37,7 @@ #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) @@ -53,73 +47,14 @@ 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; - - /* - * This is part of a workaround to allow the use of two - * discontinuous RAM ranges on the Wii, even if this is - * currently unsupported on 32-bit PowerPC Linux. - * - * We coalesce the two memory ranges of the Wii into a - * single range, then create a reservation for the "hole" - * between both ranges. - */ - - BUG_ON(memblock.memory.cnt != 2); - BUG_ON(!page_aligned(p[0].base) || !page_aligned(p[1].base)); - - /* trim unaligned tail */ - memblock_remove(ALIGN(p[1].base + p[1].size, PAGE_SIZE), - (phys_addr_t)ULLONG_MAX); - - /* determine hole, add & reserve them */ - wii_hole_start = ALIGN(p[0].base + p[0].size, PAGE_SIZE); - wii_hole_size = p[1].base - wii_hole_start; - memblock_add(wii_hole_start, wii_hole_size); - memblock_reserve(wii_hole_start, wii_hole_size); - - BUG_ON(memblock.memory.cnt != 1); - __memblock_dump_all(); - - /* allow ioremapping the address space in the hole */ - __allow_ioremap_reserved = 1; -} - -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; - 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 wii_spin(void) +static void __noreturn wii_spin(void) { local_irq_disable(); for (;;) cpu_relax(); } -static void __iomem *wii_ioremap_hw_regs(char *name, char *compatible) +static void __iomem *__init wii_ioremap_hw_regs(char *name, char *compatible) { void __iomem *hw_regs = NULL; struct device_node *np; @@ -133,14 +68,14 @@ static void __iomem *wii_ioremap_hw_regs(char *name, char *compatible) } error = of_address_to_resource(np, 0, &res); if (error) { - pr_err("no valid reg found for %s\n", np->name); + pr_err("no valid reg found for %pOFn\n", np); goto out_put; } hw_regs = ioremap(res.start, resource_size(&res)); if (hw_regs) { - pr_info("%s at 0x%08x mapped to 0x%p\n", name, - res.start, hw_regs); + pr_info("%s at 0x%pa mapped to 0x%p\n", name, + &res.start, hw_regs); } out_put: @@ -160,7 +95,7 @@ static void __init wii_setup_arch(void) } } -static void wii_restart(char *cmd) +static void __noreturn wii_restart(char *cmd) { local_irq_disable(); @@ -176,6 +111,12 @@ 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); @@ -185,18 +126,13 @@ static void wii_power_off(void) wii_spin(); } -static void wii_halt(void) +static void __noreturn wii_halt(void) { if (ppc_md.restart) ppc_md.restart(NULL); wii_spin(); } -static void __init wii_init_early(void) -{ - ug_udbg_init(); -} - static void __init wii_pic_probe(void) { flipper_pic_probe(); @@ -205,11 +141,9 @@ static void __init wii_pic_probe(void) static int __init wii_probe(void) { - unsigned long dt_root; + pm_power_off = wii_power_off; - dt_root = of_get_flat_dt_root(); - if (!of_flat_dt_is_compatible(dt_root, "nintendo,wii")) - return 0; + ug_udbg_init(); return 1; } @@ -220,33 +154,27 @@ static void wii_shutdown(void) flipper_quiesce(); } +static const struct of_device_id wii_of_bus[] = { + { .compatible = "nintendo,hollywood", }, + { }, +}; + +static int __init wii_device_probe(void) +{ + of_platform_populate(NULL, wii_of_bus, NULL, NULL); + return 0; +} +machine_device_initcall(wii, wii_device_probe); + define_machine(wii) { .name = "wii", + .compatible = "nintendo,wii", .probe = wii_probe, - .init_early = wii_init_early, .setup_arch = wii_setup_arch, .restart = wii_restart, - .power_off = wii_power_off, .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 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_bus_probe(NULL, wii_of_bus, NULL); - return 0; -} -device_initcall(wii_device_probe); - |