drivers/amlogic/reboot/reboot.c - manifest_repos/kernel - Git at Google

 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
 /*
  * Copyright (c) 2019 Amlogic, Inc. All rights reserved.
  */

 #include <linux/delay.h>
 #include <linux/err.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/io.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/module.h>
 #include <linux/reboot.h>
 #include <asm/system_misc.h>
 #include <linux/amlogic/reboot.h>
 #include <asm/compiler.h>
 #include <linux/kdebug.h>
 #include <linux/arm-smccc.h>
 #ifdef CONFIG_AMLOGIC_PM_SETGPIO
 #include <linux/highmem.h>
 #endif
 #include <linux/slab.h>

 static u32 psci_function_id_restart;
 #ifdef CONFIG_MMC_TS_STORAGE_REBOOT_REASON
 u32 psci_function_id_poweroff;
 #else
 static u32 psci_function_id_poweroff;
 #endif
 static char *kernel_panic;
 static struct class *sticky_reg_cls;
 static char *sticky_reg_dev = "sticky_reg";
 static unsigned int *sticky_reg0;
 static unsigned int *sticky_reg1;
 #define SYSCTRL_STICKY_REG5  ((0x00b5 << 2) + 0xfe005800)
 static unsigned int  *delay_reg;

 #ifdef CONFIG_MMC_TS_STORAGE_REBOOT_REASON
 extern int mmc_ts_set(const char *key, const char *value);
 #endif
 static u32 parse_reason(const char *cmd)
 {
 	u32 reboot_reason = MESON_NORMAL_BOOT;
 	u32 delay_time;

 	if (cmd) {
 		if (strcmp(cmd, "recovery") == 0 ||
 		    strcmp(cmd, "factory_reset") == 0)
 			reboot_reason = MESON_FACTORY_RESET_REBOOT;
 		else if (strcmp(cmd, "update") == 0)
 			reboot_reason = MESON_UPDATE_REBOOT;
 		else if (strcmp(cmd, "fastboot") == 0)
 			reboot_reason = MESON_FASTBOOT_REBOOT;
 		else if (strcmp(cmd, "bootloader") == 0)
 			reboot_reason = MESON_BOOTLOADER_REBOOT;
 		else if (strcmp(cmd, "rpmbp") == 0)
 			reboot_reason = MESON_RPMBP_REBOOT;
 		else if (strcmp(cmd, "report_crash") == 0)
 			reboot_reason = MESON_CRASH_REBOOT;
 		else if (strcmp(cmd, "uboot_suspend") == 0)
 			reboot_reason = MESON_UBOOT_SUSPEND;
 		else if (strcmp(cmd, "quiescent") == 0 ||
 			 strcmp(cmd, ",quiescent") == 0)
 			reboot_reason = MESON_QUIESCENT_REBOOT;
 		else if (strcmp(cmd, "recovery,quiescent") == 0 ||
 			 strcmp(cmd, "factory_reset,quiescent") == 0 ||
 			 strcmp(cmd, "quiescent,recovery") == 0 ||
 			 strcmp(cmd, "quiescent,factory_reset") == 0)
 			reboot_reason = MESON_RECOVERY_QUIESCENT_REBOOT;
 		else if (strncmp(cmd, "delayed_boot", 12) == 0) {
 			reboot_reason = MESON_DELAYED_REBOOT;
 			if (sscanf(cmd, "delayed_boot_%d", &delay_time) != 1)
 				delay_time = 0;
 			delay_reg = (unsigned int *)ioremap(SYSCTRL_STICKY_REG5, 4);
 			writel(delay_time, delay_reg);
 		}
 	} else {
 		if (kernel_panic) {
 			if (strcmp(kernel_panic, "kernel_panic") == 0) {
 				reboot_reason = MESON_KERNEL_PANIC;
 #ifdef CONFIG_MMC_TS_STORAGE_REBOOT_REASON
 				mmc_ts_set("reboot_mode", "kernel_panic");
 #endif
 			}
 		}
 	}

 	pr_info("reboot reason %d\n", reboot_reason);
 	return reboot_reason;
 }

 static noinline int __invoke_psci_fn_smc(u64 function_id, u64 arg0, u64 arg1,
 					 u64 arg2)
 {
 	struct arm_smccc_res res;

 	arm_smccc_smc((unsigned long)function_id,
 		      (unsigned long)arg0,
 		      (unsigned long)arg1,
 		      (unsigned long)arg2,
 		      0, 0, 0, 0, &res);
 	return res.a0;
 }

 void meson_smc_restart(u64 function_id, u64 reboot_reason)
 {
 	__invoke_psci_fn_smc(function_id,
 			     reboot_reason, 0, 0);
 }

 void meson_common_restart(char mode, const char *cmd)
 {
 	u32 reboot_reason = parse_reason(cmd);

 	if (psci_function_id_restart)
 		meson_smc_restart((u64)psci_function_id_restart,
 				  (u64)reboot_reason);
 }

 static void do_aml_restart(enum reboot_mode reboot_mode, const char *cmd)
 {
 	meson_common_restart(reboot_mode, cmd);
 }

 static void do_aml_poweroff(void)
 {
 	/* TODO: Add poweroff capability */
 	__invoke_psci_fn_smc(0x82000042, 1, 0, 0);
 	/* change poweroff to reset */
 	if (psci_function_id_poweroff == 0x84000009)
 		__invoke_psci_fn_smc(psci_function_id_poweroff,
 				MESON_NORMAL_BOOT, 0, 0);
 	else
 		__invoke_psci_fn_smc(psci_function_id_poweroff,
 				0, 0, 0);
 }

 static int panic_notify(struct notifier_block *self,
 			unsigned long cmd, void *ptr)
 {
 	kernel_panic = "kernel_panic";

 	return NOTIFY_DONE;
 }

 static struct notifier_block panic_notifier = {
 	.notifier_call	= panic_notify,
 };

 static ssize_t sticky_reg_show(struct device *parent,
 			 struct device_attribute *attr, char *buf)
 {
 	int ret = 0;
 	unsigned int reg0_val;
 	unsigned int reg1_val;

 	if ((sticky_reg0 != 0) && (sticky_reg1 != 0)) {
 		reg0_val = readl(sticky_reg0);
 		reg1_val = readl(sticky_reg1);
 		ret = sprintf(buf, "sticky_reg0=0x%x, sticky_reg1=0x%x\n",
 				reg0_val, reg1_val);

 	} else {
 		ret = sprintf(buf, "invalid sticky register\n");
 	}

 	return ret;
 }

 static ssize_t sticky_reg_store(struct device *parent,
 		struct device_attribute *attr, const char *buf, size_t size)
 {
 	int val;

 	if (sscanf(buf, "%d", &val) != 1)
 		return size;

 	if (val == 0) {
 		if ((sticky_reg0 != 0) && (sticky_reg1 != 0)) {
 			writel(0x0, sticky_reg0);
 			writel(0x0, sticky_reg1);
 		}
 	}

 	return size;
 }

 static DEVICE_ATTR_RW(sticky_reg);

 static struct attribute *sticky_reg_attrs[] = {
 	&dev_attr_sticky_reg.attr,
 	NULL,
 };
 ATTRIBUTE_GROUPS(sticky_reg);

 static int aml_restart_probe(struct platform_device *pdev)
 {
 	u32 id;
 	int ret;
 	unsigned int reg;

 	if (!of_property_read_u32(pdev->dev.of_node, "sys_reset", &id)) {
 		psci_function_id_restart = id;
 		arm_pm_restart = do_aml_restart;
 	}

 	if (!of_property_read_u32(pdev->dev.of_node, "sys_poweroff", &id)) {
 		psci_function_id_poweroff = id;
 		pm_power_off = do_aml_poweroff;
 	}

 	/* SYSCTRL_STICKY_REG6 */
 	if (!of_property_read_u32(pdev->dev.of_node, "sticky_reg0", &reg))
 		sticky_reg0 = (unsigned int *)ioremap(reg, 4);

 	/* SYSCTRL_STICKY_REG7 */
 	if (!of_property_read_u32(pdev->dev.of_node, "sticky_reg1", &reg))
 		sticky_reg1 = (unsigned int *)ioremap(reg, 4);

 	sticky_reg_cls = kzalloc(sizeof(struct class), GFP_KERNEL);
 	if (sticky_reg_cls == NULL) {
 		pr_err("%s no mem for zalloc\n", __func__);
 		return -1;
 	}
 	sticky_reg_cls->name = sticky_reg_dev;
 	sticky_reg_cls->class_groups = sticky_reg_groups;
 	if (class_register(sticky_reg_cls) < 0) {
 		pr_err("failed to class_reg for sticky reg\n");
 		return -1;
 	}

 	ret = register_die_notifier(&panic_notifier);
 	return ret;
 }

 static const struct of_device_id of_aml_restart_match[] = {
 	{ .compatible = "aml, reboot", },
 	{},
 };
 MODULE_DEVICE_TABLE(of, of_aml_restart_match);

 static struct platform_driver aml_restart_driver = {
 	.probe = aml_restart_probe,
 	.driver = {
 		.name = "aml-restart",
 		.of_match_table = of_match_ptr(of_aml_restart_match),
 	},
 };

 static int __init aml_restart_init(void)
 {
 	return platform_driver_register(&aml_restart_driver);
 }
 device_initcall(aml_restart_init);
	// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
	/*
	* Copyright (c) 2019 Amlogic, Inc. All rights reserved.
	*/

	#include <linux/delay.h>
	#include <linux/err.h>
	#include <linux/init.h>
	#include <linux/kernel.h>
	#include <linux/io.h>
	#include <linux/of.h>
	#include <linux/platform_device.h>
	#include <linux/module.h>
	#include <linux/reboot.h>
	#include <asm/system_misc.h>
	#include <linux/amlogic/reboot.h>
	#include <asm/compiler.h>
	#include <linux/kdebug.h>
	#include <linux/arm-smccc.h>
	#ifdef CONFIG_AMLOGIC_PM_SETGPIO
	#include <linux/highmem.h>
	#endif
	#include <linux/slab.h>

	static u32 psci_function_id_restart;
	#ifdef CONFIG_MMC_TS_STORAGE_REBOOT_REASON
	u32 psci_function_id_poweroff;
	#else
	static u32 psci_function_id_poweroff;
	#endif
	static char *kernel_panic;
	static struct class *sticky_reg_cls;
	static char *sticky_reg_dev = "sticky_reg";
	static unsigned int *sticky_reg0;
	static unsigned int *sticky_reg1;
	#define SYSCTRL_STICKY_REG5 ((0x00b5 << 2) + 0xfe005800)
	static unsigned int *delay_reg;

	#ifdef CONFIG_MMC_TS_STORAGE_REBOOT_REASON
	extern int mmc_ts_set(const char key, const char value);
	#endif
	static u32 parse_reason(const char *cmd)
	{
	u32 reboot_reason = MESON_NORMAL_BOOT;
	u32 delay_time;

	if (cmd) {
	if (strcmp(cmd, "recovery") == 0 \|\|
	strcmp(cmd, "factory_reset") == 0)
	reboot_reason = MESON_FACTORY_RESET_REBOOT;
	else if (strcmp(cmd, "update") == 0)
	reboot_reason = MESON_UPDATE_REBOOT;
	else if (strcmp(cmd, "fastboot") == 0)
	reboot_reason = MESON_FASTBOOT_REBOOT;
	else if (strcmp(cmd, "bootloader") == 0)
	reboot_reason = MESON_BOOTLOADER_REBOOT;
	else if (strcmp(cmd, "rpmbp") == 0)
	reboot_reason = MESON_RPMBP_REBOOT;
	else if (strcmp(cmd, "report_crash") == 0)
	reboot_reason = MESON_CRASH_REBOOT;
	else if (strcmp(cmd, "uboot_suspend") == 0)
	reboot_reason = MESON_UBOOT_SUSPEND;
	else if (strcmp(cmd, "quiescent") == 0 \|\|
	strcmp(cmd, ",quiescent") == 0)
	reboot_reason = MESON_QUIESCENT_REBOOT;
	else if (strcmp(cmd, "recovery,quiescent") == 0 \|\|
	strcmp(cmd, "factory_reset,quiescent") == 0 \|\|
	strcmp(cmd, "quiescent,recovery") == 0 \|\|
	strcmp(cmd, "quiescent,factory_reset") == 0)
	reboot_reason = MESON_RECOVERY_QUIESCENT_REBOOT;
	else if (strncmp(cmd, "delayed_boot", 12) == 0) {
	reboot_reason = MESON_DELAYED_REBOOT;
	if (sscanf(cmd, "delayed_boot_%d", &delay_time) != 1)
	delay_time = 0;
	delay_reg = (unsigned int *)ioremap(SYSCTRL_STICKY_REG5, 4);
	writel(delay_time, delay_reg);
	}
	} else {
	if (kernel_panic) {
	if (strcmp(kernel_panic, "kernel_panic") == 0) {
	reboot_reason = MESON_KERNEL_PANIC;
	#ifdef CONFIG_MMC_TS_STORAGE_REBOOT_REASON
	mmc_ts_set("reboot_mode", "kernel_panic");
	#endif
	}
	}
	}

	pr_info("reboot reason %d\n", reboot_reason);
	return reboot_reason;
	}

	static noinline int __invoke_psci_fn_smc(u64 function_id, u64 arg0, u64 arg1,
	u64 arg2)
	{
	struct arm_smccc_res res;

	arm_smccc_smc((unsigned long)function_id,
	(unsigned long)arg0,
	(unsigned long)arg1,
	(unsigned long)arg2,
	0, 0, 0, 0, &res);
	return res.a0;
	}

	void meson_smc_restart(u64 function_id, u64 reboot_reason)
	{
	__invoke_psci_fn_smc(function_id,
	reboot_reason, 0, 0);
	}

	void meson_common_restart(char mode, const char *cmd)
	{
	u32 reboot_reason = parse_reason(cmd);

	if (psci_function_id_restart)
	meson_smc_restart((u64)psci_function_id_restart,
	(u64)reboot_reason);
	}

	static void do_aml_restart(enum reboot_mode reboot_mode, const char *cmd)
	{
	meson_common_restart(reboot_mode, cmd);
	}

	static void do_aml_poweroff(void)
	{
	/* TODO: Add poweroff capability */
	__invoke_psci_fn_smc(0x82000042, 1, 0, 0);
	/* change poweroff to reset */
	if (psci_function_id_poweroff == 0x84000009)
	__invoke_psci_fn_smc(psci_function_id_poweroff,
	MESON_NORMAL_BOOT, 0, 0);
	else
	__invoke_psci_fn_smc(psci_function_id_poweroff,
	0, 0, 0);
	}

	static int panic_notify(struct notifier_block *self,
	unsigned long cmd, void *ptr)
	{
	kernel_panic = "kernel_panic";

	return NOTIFY_DONE;
	}

	static struct notifier_block panic_notifier = {
	.notifier_call = panic_notify,
	};

	static ssize_t sticky_reg_show(struct device *parent,
	struct device_attribute attr, char buf)
	{
	int ret = 0;
	unsigned int reg0_val;
	unsigned int reg1_val;

	if ((sticky_reg0 != 0) && (sticky_reg1 != 0)) {
	reg0_val = readl(sticky_reg0);
	reg1_val = readl(sticky_reg1);
	ret = sprintf(buf, "sticky_reg0=0x%x, sticky_reg1=0x%x\n",
	reg0_val, reg1_val);

	} else {
	ret = sprintf(buf, "invalid sticky register\n");
	}

	return ret;
	}

	static ssize_t sticky_reg_store(struct device *parent,
	struct device_attribute attr, const char buf, size_t size)
	{
	int val;

	if (sscanf(buf, "%d", &val) != 1)
	return size;

	if (val == 0) {
	if ((sticky_reg0 != 0) && (sticky_reg1 != 0)) {
	writel(0x0, sticky_reg0);
	writel(0x0, sticky_reg1);
	}
	}

	return size;
	}

	static DEVICE_ATTR_RW(sticky_reg);

	static struct attribute *sticky_reg_attrs[] = {
	&dev_attr_sticky_reg.attr,
	NULL,
	};
	ATTRIBUTE_GROUPS(sticky_reg);

	static int aml_restart_probe(struct platform_device *pdev)
	{
	u32 id;
	int ret;
	unsigned int reg;

	if (!of_property_read_u32(pdev->dev.of_node, "sys_reset", &id)) {
	psci_function_id_restart = id;
	arm_pm_restart = do_aml_restart;
	}

	if (!of_property_read_u32(pdev->dev.of_node, "sys_poweroff", &id)) {
	psci_function_id_poweroff = id;
	pm_power_off = do_aml_poweroff;
	}

	/* SYSCTRL_STICKY_REG6 */
	if (!of_property_read_u32(pdev->dev.of_node, "sticky_reg0", &reg))
	sticky_reg0 = (unsigned int *)ioremap(reg, 4);

	/* SYSCTRL_STICKY_REG7 */
	if (!of_property_read_u32(pdev->dev.of_node, "sticky_reg1", &reg))
	sticky_reg1 = (unsigned int *)ioremap(reg, 4);

	sticky_reg_cls = kzalloc(sizeof(struct class), GFP_KERNEL);
	if (sticky_reg_cls == NULL) {
	pr_err("%s no mem for zalloc\n", __func__);
	return -1;
	}
	sticky_reg_cls->name = sticky_reg_dev;
	sticky_reg_cls->class_groups = sticky_reg_groups;
	if (class_register(sticky_reg_cls) < 0) {
	pr_err("failed to class_reg for sticky reg\n");
	return -1;
	}

	ret = register_die_notifier(&panic_notifier);
	return ret;
	}

	static const struct of_device_id of_aml_restart_match[] = {
	{ .compatible = "aml, reboot", },
	{},
	};
	MODULE_DEVICE_TABLE(of, of_aml_restart_match);

	static struct platform_driver aml_restart_driver = {
	.probe = aml_restart_probe,
	.driver = {
	.name = "aml-restart",
	.of_match_table = of_match_ptr(of_aml_restart_match),
	},
	};

	static int __init aml_restart_init(void)
	{
	return platform_driver_register(&aml_restart_driver);
	}
	device_initcall(aml_restart_init);