1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 *  Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de>
  4 *  Copyright (C) 2011, Maarten ter Huurne <maarten@treewalker.org>
  5 *  JZ4740 setup code
  6 */
  7
  8#include <linux/clocksource.h>
  9#include <linux/init.h>
 10#include <linux/io.h>
 11#include <linux/irqchip.h>
 12#include <linux/kernel.h>
 13#include <linux/libfdt.h>
 14#include <linux/of_clk.h>
 15#include <linux/of_fdt.h>
 16#include <linux/pm.h>
 17#include <linux/sizes.h>
 18#include <linux/suspend.h>
 19
 20#include <asm/bootinfo.h>
 21#include <asm/fw/fw.h>
 22#include <asm/prom.h>
 23#include <asm/reboot.h>
 24#include <asm/time.h>
 25
 26static unsigned long __init get_board_mach_type(const void *fdt)
 27{
 28	if (!fdt_node_check_compatible(fdt, 0, "ingenic,x2000"))
 29		return MACH_INGENIC_X2000;
 30	if (!fdt_node_check_compatible(fdt, 0, "ingenic,x1830"))
 31		return MACH_INGENIC_X1830;
 32	if (!fdt_node_check_compatible(fdt, 0, "ingenic,x1000"))
 33		return MACH_INGENIC_X1000;
 34	if (!fdt_node_check_compatible(fdt, 0, "ingenic,jz4780"))
 35		return MACH_INGENIC_JZ4780;
 36	if (!fdt_node_check_compatible(fdt, 0, "ingenic,jz4770"))
 37		return MACH_INGENIC_JZ4770;
 38	if (!fdt_node_check_compatible(fdt, 0, "ingenic,jz4725b"))
 39		return MACH_INGENIC_JZ4725B;
 40
 41	return MACH_INGENIC_JZ4740;
 42}
 43
 44void __init plat_mem_setup(void)
 45{
 46	void *dtb = (void *)fw_passed_dtb;
 47
 48	__dt_setup_arch(dtb);
 49
 50	/*
 51	 * Old devicetree files for the qi,lb60 board did not have a /memory
 52	 * node. Hardcode the memory info here.
 53	 */
 54	if (!fdt_node_check_compatible(dtb, 0, "qi,lb60") &&
 55	    fdt_path_offset(dtb, "/memory") < 0)
 56		early_init_dt_add_memory_arch(0, SZ_32M);
 57
 58	mips_machtype = get_board_mach_type(dtb);
 59}
 60
 61void __init device_tree_init(void)
 62{
 63	if (!initial_boot_params)
 64		return;
 65
 66	unflatten_and_copy_device_tree();
 67}
 68
 69const char *get_system_type(void)
 70{
 71	switch (mips_machtype) {
 72	case MACH_INGENIC_X2000:
 73		return "X2000";
 74	case MACH_INGENIC_X1830:
 75		return "X1830";
 76	case MACH_INGENIC_X1000:
 77		return "X1000";
 78	case MACH_INGENIC_JZ4780:
 79		return "JZ4780";
 80	case MACH_INGENIC_JZ4770:
 81		return "JZ4770";
 82	case MACH_INGENIC_JZ4725B:
 83		return "JZ4725B";
 84	default:
 85		return "JZ4740";
 86	}
 87}
 88
 89void __init arch_init_irq(void)
 90{
 91	irqchip_init();
 92}
 93
 94void __init plat_time_init(void)
 95{
 96	of_clk_init(NULL);
 97	timer_probe();
 98}
 99
100void __init prom_init(void)
101{
102	fw_init_cmdline();
103}
104
105void __init prom_free_prom_memory(void)
106{
107}
108
109static void jz4740_wait_instr(void)
110{
111	__asm__(".set push;\n"
112		".set mips3;\n"
113		"wait;\n"
114		".set pop;\n"
115	);
116}
117
118static void jz4740_halt(void)
119{
120	for (;;)
121		jz4740_wait_instr();
122}
123
124static int __maybe_unused jz4740_pm_enter(suspend_state_t state)
125{
126	jz4740_wait_instr();
127
128	return 0;
129}
130
131static const struct platform_suspend_ops jz4740_pm_ops __maybe_unused = {
132	.valid = suspend_valid_only_mem,
133	.enter = jz4740_pm_enter,
134};
135
136static int __init jz4740_pm_init(void)
137{
138	if (IS_ENABLED(CONFIG_PM_SLEEP))
139		suspend_set_ops(&jz4740_pm_ops);
140	_machine_halt = jz4740_halt;
141
142	return 0;
143
144}
145late_initcall(jz4740_pm_init);