reboot: add reboot driver for m8b

PD#141217: add reboot driver for m8b

Change-Id: I99201af1d13744278b30e11f37f1551ad3289ca3
Signed-off-by: Jianxin Pan <jianxin.pan@amlogic.com>

MAINTAINERS

@@ -13461,7 +13461,7 @@ M:	Yun Cai <yum.cai@amlogic.com>
 F:	drivers/amlogic/efuse/*
 F:	include/linux/amlogic/efuse.h
 
-AMLOGIC reboot
+AMLOGIC reboot for gx and M8b
 M:	Jianxin Pan <jianxin.pan@amlogic.com>
 F:	drivers/amlogic/reboot/*
 

arch/arm/boot/dts/amlogic/meson8b.dtsi

@@ -952,5 +952,11 @@ dwc2_b {
 				reg = <0xc110875c  0x4>,
 					<0xc1108764 0x4>;
 	};
+
+	aml_reboot{
+		compatible = "aml, reboot_m8b";
+		status = "okay";
+	};
+
 	}; /* end of soc*/
 }; /* end of / */

arch/arm/configs/meson32_defconfig

@@ -180,6 +180,8 @@ CONFIG_AMLOGIC_SARADC=y
 CONFIG_AMLOGIC_REMOTE=y
 CONFIG_AMLOGIC_MESON_REMOTE=y
 CONFIG_AMLOGIC_EFUSE=y
+CONFIG_AMLOGIC_REBOOT=y
+CONFIG_AMLOGIC_M8B_REBOOT=y
 CONFIG_AMLOGIC_CPU_HOTPLUG=y
 CONFIG_AMLOGIC_PWM=y
 CONFIG_AMLOGIC_MMC=y

arch/arm64/configs/meson64_defconfig

@@ -192,6 +192,7 @@ CONFIG_AMLOGIC_REMOTE=y
 CONFIG_AMLOGIC_MESON_REMOTE=y
 CONFIG_AMLOGIC_EFUSE=y
 CONFIG_AMLOGIC_REBOOT=y
+CONFIG_AMLOGIC_GX_REBOOT=y
 CONFIG_AMLOGIC_INTERNAL_PHY=y
 CONFIG_AMLOGIC_CPU_HOTPLUG=y
 CONFIG_AMLOGIC_PWM=y

drivers/amlogic/reboot/Kconfig

@@ -8,3 +8,23 @@ config AMLOGIC_REBOOT
 		or poweroff
 		driver.
 
+config AMLOGIC_GX_REBOOT
+	bool "Amlogic reboot gx"
+	depends on AMLOGIC_REBOOT
+	default n
+    help
+		This is the Amlogic GX reboot driver.
+
+config AMLOGIC_M8B_REBOOT
+	bool "Amlogic reboot m8b"
+	depends on AMLOGIC_REBOOT
+	default n
+    help
+		This is the Amlogic M8b reboot driver.
+
+config AMLOGIC_M8B_REBOOT_UBOOT_SUSPEND
+	bool "Amlogic reboot uboot suspend"
+	depends on AMLOGIC_M8B_REBOOT
+	default n
+    help
+		This is the Amlogic M8b reboot uboot suspend driver.

drivers/amlogic/reboot/Makefile

@@ -1,5 +1,5 @@
 #
 #Makefile for the RESET dirver
 #
-obj-$(CONFIG_AMLOGIC_REBOOT)	+= reboot.o
-
+obj-$(CONFIG_AMLOGIC_GX_REBOOT)	+= reboot.o
+obj-$(CONFIG_AMLOGIC_M8B_REBOOT)	+= reboot_m8b.o

drivers/amlogic/reboot/reboot_m8b.c

@@ -0,0 +1,140 @@
+/*
+ * drivers/amlogic/reboot/reboot_m8b.c
+ *
+ * Copyright (C) 2017 Amlogic, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ */
+
+#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/iomap.h>
+#include <linux/amlogic/cpu_version.h>
+#include <asm/compiler.h>
+#include <linux/kdebug.h>
+#include <linux/amlogic/iomap.h>
+#include <linux/cpuidle.h>
+#include <asm/cpuidle.h>
+#include <linux/amlogic/reboot_m8b.h>
+
+
+
+#define WATCHDOG_ENABLE_BIT		(1<<19)
+#define  DUAL_CORE_RESET			 (3<<24)
+#define AO_RTI_STATUS_REG1			((0x00 << 10) | (0x01 << 2))
+#define VENC_VDAC_SETTING			0x1b7e
+#define WATCHDOG_RESET			0x2641
+#define WATCHDOG_TC				0x2640
+
+#ifdef AMLOGIC_M8B_REBOOT_UBOOT_SUSPEND
+static int reboot_flag;
+static int __init do_parse_args(char *line)
+{
+	if (strcmp(line, "uboot_suspend") == 0)
+		reboot_flag = 1;
+	pr_info("reboot_flag=%x\n", reboot_flag);
+	return 1;
+}
+__setup("reboot_args=", do_parse_args);
+#endif
+
+static inline void arch_reset(char mode, const char *cmd)
+{
+	aml_write_cbus(VENC_VDAC_SETTING, 0xf);
+	aml_write_cbus(WATCHDOG_RESET, 0);
+	aml_write_cbus(WATCHDOG_TC,
+		DUAL_CORE_RESET | WATCHDOG_ENABLE_BIT | 100);
+	while (1)
+		cpu_do_idle();
+}
+
+
+void meson_common_restart(char mode, const char *cmd)
+{
+	u32 reboot_reason = MESON_NORMAL_BOOT;
+
+	if (cmd) {
+		if (strcmp(cmd, "charging_reboot") == 0)
+			reboot_reason = MESON_CHARGING_REBOOT;
+		else 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, "report_crash") == 0)
+			reboot_reason = MESON_CRASH_REBOOT;
+		else if (strcmp(cmd, "factory_testl_reboot") == 0)
+			reboot_reason = MESON_FACTORY_TEST_REBOOT;
+		else if (strcmp(cmd, "switch_system") == 0)
+			reboot_reason = MESON_SYSTEM_SWITCH_REBOOT;
+		else if (strcmp(cmd, "safe_mode") == 0)
+			reboot_reason = MESON_SAFE_REBOOT;
+		else if (strcmp(cmd, "lock_system") == 0)
+			reboot_reason = MESON_LOCK_REBOOT;
+		else if (strcmp(cmd, "usb_burner_reboot") == 0)
+			reboot_reason = MESON_USB_BURNER_REBOOT;
+		else if (strcmp(cmd, "uboot_suspend") == 0)
+			reboot_reason = MESON_UBOOT_SUSPEND;
+	}
+	aml_write_aobus(AO_RTI_STATUS_REG1, reboot_reason);
+	pr_info("reboot_reason(0x%x) = 0x%x\n", AO_RTI_STATUS_REG1,
+		aml_read_aobus(AO_RTI_STATUS_REG1));
+	arch_reset(mode, cmd);
+}
+
+static void do_aml_restart(enum reboot_mode reboot_mode, const char *cmd)
+{
+	pr_info("meson power off\n");
+#ifdef AMLOGIC_M8B_REBOOT_UBOOT_SUSPEND
+	if (reboot_flag)
+		meson_common_restart('h', "uboot_suspend");
+	else
+#endif
+		meson_common_restart('h', "charging_reboot");
+}
+
+static int aml_restart_probe(struct platform_device *pdev)
+{
+	arm_pm_restart = do_aml_restart;
+	return 0;
+}
+
+static const struct of_device_id of_aml_restart_match[] = {
+	{ .compatible = "aml, reboot_m8b", },
+	{},
+};
+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);
+

include/linux/amlogic/reboot_m8b.h

@@ -0,0 +1,33 @@
+#ifndef __reboot_m8b_h_
+#define __reboot_m8b_h_
+/*
+ * include/linux/amlogic/reboot_m8b.h
+ *
+ * Copyright (C) 2017 Amlogic, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ */
+
+/*******************************************************************/
+#define	MESON_CHARGING_REBOOT					0x0
+#define	MESON_NORMAL_BOOT				0x01010101
+#define	MESON_FACTORY_RESET_REBOOT		0x02020202
+#define	MESON_UPDATE_REBOOT				0x03030303
+#define	MESON_CRASH_REBOOT				0x04040404
+#define	MESON_FACTORY_TEST_REBOOT		0x05050505
+#define	MESON_SYSTEM_SWITCH_REBOOT		0x06060606
+#define	MESON_SAFE_REBOOT				0x07070707
+#define	MESON_LOCK_REBOOT				0x08080808
+#define	MESON_USB_BURNER_REBOOT			0x09090909
+#define MESON_UBOOT_SUSPEND				0x0b0b0b0b
+#define	MESON_REBOOT_CLEAR				0xdeaddead
+#endif