LXR linux/arch/mips/generic/board-ingenic.c

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Support for Ingenic SoCs
   4 *
   5 * Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de>
   6 * Copyright (C) 2011, Maarten ter Huurne <maarten@treewalker.org>
   7 * Copyright (C) 2020 Paul Cercueil <paul@crapouillou.net>
   8 */
   9
  10#include <linux/of_address.h>
  11#include <linux/of_fdt.h>
  12#include <linux/pm.h>
  13#include <linux/sizes.h>
  14#include <linux/suspend.h>
  15#include <linux/types.h>
  16
  17#include <asm/bootinfo.h>
  18#include <asm/machine.h>
  19#include <asm/reboot.h>
  20
  21static __init char *ingenic_get_system_type(unsigned long machtype)
  22{
  23        switch (machtype) {
  24        case MACH_INGENIC_X2000E:
  25                return "X2000E";
  26        case MACH_INGENIC_X2000:
  27                return "X2000";
  28        case MACH_INGENIC_X1830:
  29                return "X1830";
  30        case MACH_INGENIC_X1000E:
  31                return "X1000E";
  32        case MACH_INGENIC_X1000:
  33                return "X1000";
  34        case MACH_INGENIC_JZ4780:
  35                return "JZ4780";
  36        case MACH_INGENIC_JZ4775:
  37                return "JZ4775";
  38        case MACH_INGENIC_JZ4770:
  39                return "JZ4770";
  40        case MACH_INGENIC_JZ4725B:
  41                return "JZ4725B";
  42        default:
  43                return "JZ4740";
  44        }
  45}
  46
  47static __init const void *ingenic_fixup_fdt(const void *fdt, const void *match_data)
  48{
  49        /*
  50         * Old devicetree files for the qi,lb60 board did not have a /memory
  51         * node. Hardcode the memory info here.
  52         */
  53        if (!fdt_node_check_compatible(fdt, 0, "qi,lb60") &&
  54            fdt_path_offset(fdt, "/memory") < 0)
  55                early_init_dt_add_memory_arch(0, SZ_32M);
  56
  57        mips_machtype = (unsigned long)match_data;
  58        system_type = ingenic_get_system_type(mips_machtype);
  59
  60        return fdt;
  61}
  62
  63static const struct of_device_id ingenic_of_match[] __initconst = {
  64        { .compatible = "ingenic,jz4740", .data = (void *)MACH_INGENIC_JZ4740 },
  65        { .compatible = "ingenic,jz4725b", .data = (void *)MACH_INGENIC_JZ4725B },
  66        { .compatible = "ingenic,jz4770", .data = (void *)MACH_INGENIC_JZ4770 },
  67        { .compatible = "ingenic,jz4775", .data = (void *)MACH_INGENIC_JZ4775 },
  68        { .compatible = "ingenic,jz4780", .data = (void *)MACH_INGENIC_JZ4780 },
  69        { .compatible = "ingenic,x1000", .data = (void *)MACH_INGENIC_X1000 },
  70        { .compatible = "ingenic,x1000e", .data = (void *)MACH_INGENIC_X1000E },
  71        { .compatible = "ingenic,x1830", .data = (void *)MACH_INGENIC_X1830 },
  72        { .compatible = "ingenic,x2000", .data = (void *)MACH_INGENIC_X2000 },
  73        { .compatible = "ingenic,x2000e", .data = (void *)MACH_INGENIC_X2000E },
  74        {}
  75};
  76
  77MIPS_MACHINE(ingenic) = {
  78        .matches = ingenic_of_match,
  79        .fixup_fdt = ingenic_fixup_fdt,
  80};
  81
  82static void ingenic_wait_instr(void)
  83{
  84        __asm__(".set push;\n"
  85                ".set mips3;\n"
  86                "wait;\n"
  87                ".set pop;\n"
  88        );
  89}
  90
  91static void ingenic_halt(void)
  92{
  93        for (;;)
  94                ingenic_wait_instr();
  95}
  96
  97static int __maybe_unused ingenic_pm_enter(suspend_state_t state)
  98{
  99        ingenic_wait_instr();
 100
 101        return 0;
 102}
 103
 104static const struct platform_suspend_ops ingenic_pm_ops __maybe_unused = {
 105        .valid = suspend_valid_only_mem,
 106        .enter = ingenic_pm_enter,
 107};
 108
 109static int __init ingenic_pm_init(void)
 110{
 111        if (boot_cpu_type() == CPU_XBURST) {
 112                if (IS_ENABLED(CONFIG_PM_SLEEP))
 113                        suspend_set_ops(&ingenic_pm_ops);
 114                _machine_halt = ingenic_halt;
 115        }
 116
 117        return 0;
 118
 119}
 120late_initcall(ingenic_pm_init);
 121