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/clk.h>
 11#include <linux/of.h>
 12#include <linux/of_address.h>
 13#include <linux/of_fdt.h>
 14#include <linux/pm.h>
 15#include <linux/sizes.h>
 16#include <linux/suspend.h>
 17#include <linux/types.h>
 18
 19#include <asm/bootinfo.h>
 20#include <asm/machine.h>
 21#include <asm/reboot.h>
 22
 23static __init char *ingenic_get_system_type(unsigned long machtype)
 24{
 25	switch (machtype) {
 26	case MACH_INGENIC_X2100:
 27		return "X2100";
 28	case MACH_INGENIC_X2000H:
 29		return "X2000H";
 30	case MACH_INGENIC_X2000E:
 31		return "X2000E";
 32	case MACH_INGENIC_X2000:
 33		return "X2000";
 34	case MACH_INGENIC_X1830:
 35		return "X1830";
 36	case MACH_INGENIC_X1000E:
 37		return "X1000E";
 38	case MACH_INGENIC_X1000:
 39		return "X1000";
 40	case MACH_INGENIC_JZ4780:
 41		return "JZ4780";
 42	case MACH_INGENIC_JZ4775:
 43		return "JZ4775";
 44	case MACH_INGENIC_JZ4770:
 45		return "JZ4770";
 46	case MACH_INGENIC_JZ4760B:
 47		return "JZ4760B";
 48	case MACH_INGENIC_JZ4760:
 49		return "JZ4760";
 50	case MACH_INGENIC_JZ4755:
 51		return "JZ4755";
 52	case MACH_INGENIC_JZ4750:
 53		return "JZ4750";
 54	case MACH_INGENIC_JZ4725B:
 55		return "JZ4725B";
 56	case MACH_INGENIC_JZ4730:
 57		return "JZ4730";
 58	default:
 59		return "JZ4740";
 60	}
 61}
 62
 63static __init const void *ingenic_fixup_fdt(const void *fdt, const void *match_data)
 64{
 65	/*
 66	 * Old devicetree files for the qi,lb60 board did not have a /memory
 67	 * node. Hardcode the memory info here.
 68	 */
 69	if (!fdt_node_check_compatible(fdt, 0, "qi,lb60") &&
 70	    fdt_path_offset(fdt, "/memory") < 0)
 71		early_init_dt_add_memory_arch(0, SZ_32M);
 72
 73	mips_machtype = (unsigned long)match_data;
 74	system_type = ingenic_get_system_type(mips_machtype);
 75
 76	return fdt;
 77}
 78
 79static const struct of_device_id ingenic_of_match[] __initconst = {
 80	{ .compatible = "ingenic,jz4730", .data = (void *)MACH_INGENIC_JZ4730 },
 81	{ .compatible = "ingenic,jz4740", .data = (void *)MACH_INGENIC_JZ4740 },
 82	{ .compatible = "ingenic,jz4725b", .data = (void *)MACH_INGENIC_JZ4725B },
 83	{ .compatible = "ingenic,jz4750", .data = (void *)MACH_INGENIC_JZ4750 },
 84	{ .compatible = "ingenic,jz4755", .data = (void *)MACH_INGENIC_JZ4755 },
 85	{ .compatible = "ingenic,jz4760", .data = (void *)MACH_INGENIC_JZ4760 },
 86	{ .compatible = "ingenic,jz4760b", .data = (void *)MACH_INGENIC_JZ4760B },
 87	{ .compatible = "ingenic,jz4770", .data = (void *)MACH_INGENIC_JZ4770 },
 88	{ .compatible = "ingenic,jz4775", .data = (void *)MACH_INGENIC_JZ4775 },
 89	{ .compatible = "ingenic,jz4780", .data = (void *)MACH_INGENIC_JZ4780 },
 90	{ .compatible = "ingenic,x1000", .data = (void *)MACH_INGENIC_X1000 },
 91	{ .compatible = "ingenic,x1000e", .data = (void *)MACH_INGENIC_X1000E },
 92	{ .compatible = "ingenic,x1830", .data = (void *)MACH_INGENIC_X1830 },
 93	{ .compatible = "ingenic,x2000", .data = (void *)MACH_INGENIC_X2000 },
 94	{ .compatible = "ingenic,x2000e", .data = (void *)MACH_INGENIC_X2000E },
 95	{ .compatible = "ingenic,x2000h", .data = (void *)MACH_INGENIC_X2000H },
 96	{ .compatible = "ingenic,x2100", .data = (void *)MACH_INGENIC_X2100 },
 97	{}
 98};
 99
100MIPS_MACHINE(ingenic) = {
101	.matches = ingenic_of_match,
102	.fixup_fdt = ingenic_fixup_fdt,
103};
104
105static void ingenic_wait_instr(void)
106{
107	__asm__(".set push;\n"
108		".set mips3;\n"
109		"wait;\n"
110		".set pop;\n"
111	);
112}
113
114static void ingenic_halt(void)
115{
116	for (;;)
117		ingenic_wait_instr();
118}
119
120static int __maybe_unused ingenic_pm_enter(suspend_state_t state)
121{
122	ingenic_wait_instr();
123
124	return 0;
125}
126
127static const struct platform_suspend_ops ingenic_pm_ops __maybe_unused = {
128	.valid = suspend_valid_only_mem,
129	.enter = ingenic_pm_enter,
130};
131
132static int __init ingenic_pm_init(void)
133{
134	if (boot_cpu_type() == CPU_XBURST) {
135		if (IS_ENABLED(CONFIG_PM_SLEEP))
136			suspend_set_ops(&ingenic_pm_ops);
137		_machine_halt = ingenic_halt;
138	}
139
140	return 0;
141
142}
143late_initcall(ingenic_pm_init);