162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0-or-later
262306a36Sopenharmony_ci/*
362306a36Sopenharmony_ci *  arch/arm/mach-vt8500/vt8500.c
462306a36Sopenharmony_ci *
562306a36Sopenharmony_ci *  Copyright (C) 2012 Tony Prisk <linux@prisktech.co.nz>
662306a36Sopenharmony_ci */
762306a36Sopenharmony_ci
862306a36Sopenharmony_ci#include <linux/io.h>
962306a36Sopenharmony_ci#include <linux/pm.h>
1062306a36Sopenharmony_ci#include <linux/reboot.h>
1162306a36Sopenharmony_ci
1262306a36Sopenharmony_ci#include <asm/mach-types.h>
1362306a36Sopenharmony_ci#include <asm/mach/arch.h>
1462306a36Sopenharmony_ci#include <asm/mach/time.h>
1562306a36Sopenharmony_ci#include <asm/mach/map.h>
1662306a36Sopenharmony_ci
1762306a36Sopenharmony_ci#include <linux/of.h>
1862306a36Sopenharmony_ci#include <linux/of_address.h>
1962306a36Sopenharmony_ci#include <linux/of_irq.h>
2062306a36Sopenharmony_ci
2162306a36Sopenharmony_ci#define LEGACY_GPIO_BASE	0xD8110000
2262306a36Sopenharmony_ci#define LEGACY_PMC_BASE		0xD8130000
2362306a36Sopenharmony_ci
2462306a36Sopenharmony_ci/* Registers in GPIO Controller */
2562306a36Sopenharmony_ci#define VT8500_GPIO_MUX_REG	0x200
2662306a36Sopenharmony_ci
2762306a36Sopenharmony_ci/* Registers in Power Management Controller */
2862306a36Sopenharmony_ci#define VT8500_HCR_REG		0x12
2962306a36Sopenharmony_ci#define VT8500_PMSR_REG		0x60
3062306a36Sopenharmony_ci
3162306a36Sopenharmony_cistatic void __iomem *pmc_base;
3262306a36Sopenharmony_ci
3362306a36Sopenharmony_cistatic void vt8500_restart(enum reboot_mode mode, const char *cmd)
3462306a36Sopenharmony_ci{
3562306a36Sopenharmony_ci	if (pmc_base)
3662306a36Sopenharmony_ci		writel(1, pmc_base + VT8500_PMSR_REG);
3762306a36Sopenharmony_ci}
3862306a36Sopenharmony_ci
3962306a36Sopenharmony_cistatic struct map_desc vt8500_io_desc[] __initdata = {
4062306a36Sopenharmony_ci	/* SoC MMIO registers */
4162306a36Sopenharmony_ci	[0] = {
4262306a36Sopenharmony_ci		.virtual	= 0xf8000000,
4362306a36Sopenharmony_ci		.pfn		= __phys_to_pfn(0xd8000000),
4462306a36Sopenharmony_ci		.length		= 0x00390000, /* max of all chip variants */
4562306a36Sopenharmony_ci		.type		= MT_DEVICE
4662306a36Sopenharmony_ci	},
4762306a36Sopenharmony_ci};
4862306a36Sopenharmony_ci
4962306a36Sopenharmony_cistatic void __init vt8500_map_io(void)
5062306a36Sopenharmony_ci{
5162306a36Sopenharmony_ci	iotable_init(vt8500_io_desc, ARRAY_SIZE(vt8500_io_desc));
5262306a36Sopenharmony_ci}
5362306a36Sopenharmony_ci
5462306a36Sopenharmony_cistatic void vt8500_power_off(void)
5562306a36Sopenharmony_ci{
5662306a36Sopenharmony_ci	local_irq_disable();
5762306a36Sopenharmony_ci	writew(5, pmc_base + VT8500_HCR_REG);
5862306a36Sopenharmony_ci	asm("mcr p15, 0, %0, c7, c0, 4" : : "r" (0));
5962306a36Sopenharmony_ci}
6062306a36Sopenharmony_ci
6162306a36Sopenharmony_cistatic void __init vt8500_init(void)
6262306a36Sopenharmony_ci{
6362306a36Sopenharmony_ci	struct device_node *np;
6462306a36Sopenharmony_ci#if defined(CONFIG_FB_VT8500) || defined(CONFIG_FB_WM8505)
6562306a36Sopenharmony_ci	struct device_node *fb;
6662306a36Sopenharmony_ci	void __iomem *gpio_base;
6762306a36Sopenharmony_ci#endif
6862306a36Sopenharmony_ci
6962306a36Sopenharmony_ci#ifdef CONFIG_FB_VT8500
7062306a36Sopenharmony_ci	fb = of_find_compatible_node(NULL, NULL, "via,vt8500-fb");
7162306a36Sopenharmony_ci	if (fb) {
7262306a36Sopenharmony_ci		np = of_find_compatible_node(NULL, NULL, "via,vt8500-gpio");
7362306a36Sopenharmony_ci		if (np) {
7462306a36Sopenharmony_ci			gpio_base = of_iomap(np, 0);
7562306a36Sopenharmony_ci
7662306a36Sopenharmony_ci			if (!gpio_base)
7762306a36Sopenharmony_ci				pr_err("%s: of_iomap(gpio_mux) failed\n",
7862306a36Sopenharmony_ci								__func__);
7962306a36Sopenharmony_ci
8062306a36Sopenharmony_ci			of_node_put(np);
8162306a36Sopenharmony_ci		} else {
8262306a36Sopenharmony_ci			gpio_base = ioremap(LEGACY_GPIO_BASE, 0x1000);
8362306a36Sopenharmony_ci			if (!gpio_base)
8462306a36Sopenharmony_ci				pr_err("%s: ioremap(legacy_gpio_mux) failed\n",
8562306a36Sopenharmony_ci								__func__);
8662306a36Sopenharmony_ci		}
8762306a36Sopenharmony_ci		if (gpio_base) {
8862306a36Sopenharmony_ci			writel(readl(gpio_base + VT8500_GPIO_MUX_REG) | 1,
8962306a36Sopenharmony_ci				gpio_base + VT8500_GPIO_MUX_REG);
9062306a36Sopenharmony_ci			iounmap(gpio_base);
9162306a36Sopenharmony_ci		} else
9262306a36Sopenharmony_ci			pr_err("%s: Could not remap GPIO mux\n", __func__);
9362306a36Sopenharmony_ci
9462306a36Sopenharmony_ci		of_node_put(fb);
9562306a36Sopenharmony_ci	}
9662306a36Sopenharmony_ci#endif
9762306a36Sopenharmony_ci
9862306a36Sopenharmony_ci#ifdef CONFIG_FB_WM8505
9962306a36Sopenharmony_ci	fb = of_find_compatible_node(NULL, NULL, "wm,wm8505-fb");
10062306a36Sopenharmony_ci	if (fb) {
10162306a36Sopenharmony_ci		np = of_find_compatible_node(NULL, NULL, "wm,wm8505-gpio");
10262306a36Sopenharmony_ci		if (!np)
10362306a36Sopenharmony_ci			np = of_find_compatible_node(NULL, NULL,
10462306a36Sopenharmony_ci							"wm,wm8650-gpio");
10562306a36Sopenharmony_ci		if (np) {
10662306a36Sopenharmony_ci			gpio_base = of_iomap(np, 0);
10762306a36Sopenharmony_ci
10862306a36Sopenharmony_ci			if (!gpio_base)
10962306a36Sopenharmony_ci				pr_err("%s: of_iomap(gpio_mux) failed\n",
11062306a36Sopenharmony_ci								__func__);
11162306a36Sopenharmony_ci
11262306a36Sopenharmony_ci			of_node_put(np);
11362306a36Sopenharmony_ci		} else {
11462306a36Sopenharmony_ci			gpio_base = ioremap(LEGACY_GPIO_BASE, 0x1000);
11562306a36Sopenharmony_ci			if (!gpio_base)
11662306a36Sopenharmony_ci				pr_err("%s: ioremap(legacy_gpio_mux) failed\n",
11762306a36Sopenharmony_ci								__func__);
11862306a36Sopenharmony_ci		}
11962306a36Sopenharmony_ci		if (gpio_base) {
12062306a36Sopenharmony_ci			writel(readl(gpio_base + VT8500_GPIO_MUX_REG) |
12162306a36Sopenharmony_ci				0x80000000, gpio_base + VT8500_GPIO_MUX_REG);
12262306a36Sopenharmony_ci			iounmap(gpio_base);
12362306a36Sopenharmony_ci		} else
12462306a36Sopenharmony_ci			pr_err("%s: Could not remap GPIO mux\n", __func__);
12562306a36Sopenharmony_ci
12662306a36Sopenharmony_ci		of_node_put(fb);
12762306a36Sopenharmony_ci	}
12862306a36Sopenharmony_ci#endif
12962306a36Sopenharmony_ci
13062306a36Sopenharmony_ci	np = of_find_compatible_node(NULL, NULL, "via,vt8500-pmc");
13162306a36Sopenharmony_ci	if (np) {
13262306a36Sopenharmony_ci		pmc_base = of_iomap(np, 0);
13362306a36Sopenharmony_ci
13462306a36Sopenharmony_ci		if (!pmc_base)
13562306a36Sopenharmony_ci			pr_err("%s:of_iomap(pmc) failed\n", __func__);
13662306a36Sopenharmony_ci
13762306a36Sopenharmony_ci		of_node_put(np);
13862306a36Sopenharmony_ci	} else {
13962306a36Sopenharmony_ci		pmc_base = ioremap(LEGACY_PMC_BASE, 0x1000);
14062306a36Sopenharmony_ci		if (!pmc_base)
14162306a36Sopenharmony_ci			pr_err("%s:ioremap(power_off) failed\n", __func__);
14262306a36Sopenharmony_ci	}
14362306a36Sopenharmony_ci	if (pmc_base)
14462306a36Sopenharmony_ci		pm_power_off = &vt8500_power_off;
14562306a36Sopenharmony_ci	else
14662306a36Sopenharmony_ci		pr_err("%s: PMC Hibernation register could not be remapped, not enabling power off!\n", __func__);
14762306a36Sopenharmony_ci}
14862306a36Sopenharmony_ci
14962306a36Sopenharmony_cistatic const char * const vt8500_dt_compat[] = {
15062306a36Sopenharmony_ci	"via,vt8500",
15162306a36Sopenharmony_ci	"wm,wm8650",
15262306a36Sopenharmony_ci	"wm,wm8505",
15362306a36Sopenharmony_ci	"wm,wm8750",
15462306a36Sopenharmony_ci	"wm,wm8850",
15562306a36Sopenharmony_ci	NULL
15662306a36Sopenharmony_ci};
15762306a36Sopenharmony_ci
15862306a36Sopenharmony_ciDT_MACHINE_START(WMT_DT, "VIA/Wondermedia SoC (Device Tree Support)")
15962306a36Sopenharmony_ci	.dt_compat	= vt8500_dt_compat,
16062306a36Sopenharmony_ci	.map_io		= vt8500_map_io,
16162306a36Sopenharmony_ci	.init_machine	= vt8500_init,
16262306a36Sopenharmony_ci	.restart	= vt8500_restart,
16362306a36Sopenharmony_ciMACHINE_END
16462306a36Sopenharmony_ci
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