/*
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* Copyright (c) 2015 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef __SYSRESET_H
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#define __SYSRESET_H
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enum sysreset_t {
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SYSRESET_WARM, /* Reset CPU, keep GPIOs active */
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SYSRESET_COLD, /* Reset CPU and GPIOs */
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SYSRESET_POWER, /* Reset PMIC (remove and restore power) */
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SYSRESET_COUNT,
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};
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struct sysreset_ops {
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/**
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* request() - request a sysreset of the given type
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*
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* Note that this function may return before the reset takes effect.
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*
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* @type: Reset type to request
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* @return -EINPROGRESS if the reset has been started and
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* will complete soon, -EPROTONOSUPPORT if not supported
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* by this device, 0 if the reset has already happened
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* (in which case this method will not actually return)
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*/
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int (*request)(struct udevice *dev, enum sysreset_t type);
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/**
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* request_by_mode() - request a sysreset of the given mode
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*
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* Note that this function may return before the reset takes effect.
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*
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* @mode: mode to request
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* @return -EINPROGRESS if the reset has been started and
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* will complete soon, -EPROTONOSUPPORT if not supported
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* by this device, 0 if the reset has already happened
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* (in which case this method will not actually return)
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*/
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int (*request_by_mode)(struct udevice *dev, const char *mode);
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};
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#define sysreset_get_ops(dev) ((struct sysreset_ops *)(dev)->driver->ops)
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#ifdef CONFIG_SYSRESET
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/**
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* sysreset_request() - request a sysreset
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*
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* @type: Reset type to request
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* @return 0 if OK, -EPROTONOSUPPORT if not supported by this device
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*/
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int sysreset_request(struct udevice *dev, enum sysreset_t type);
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/**
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* sysreset_walk() - cause a system reset
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*
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* This works through the available sysreset devices until it finds one that can
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* perform a reset. If the provided sysreset type is not available, the next one
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* will be tried.
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*
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* If this function fails to reset, it will display a message and halt
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*
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* @type: Reset type to request
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* @return -EINPROGRESS if a reset is in progress, -ENOSYS if not available
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*/
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int sysreset_walk(enum sysreset_t type);
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/**
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* sysreset_walk_halt() - try to reset, otherwise halt
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*
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* This calls sysreset_walk(). If it returns, indicating that reset is not
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* supported, it prints a message and halts.
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*/
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void sysreset_walk_halt(enum sysreset_t type);
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/**
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* reset_cpu() - calls sysreset_walk(SYSRESET_WARM)
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*/
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void reset_cpu(ulong addr);
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/**
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* reboot() - calls sysreset_walk(SYSRESET_WARM)
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*
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* Support the command like: reboot loader/bootloader/recovery, etc.
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*/
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void reboot(const char *mode);
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#else
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#include <asm/io.h>
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inline void reset_cpu(ulong addr)
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{
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writel(CONFIG_SYSRESET_VAL, CONFIG_SYSRESET_REG);
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dsb();
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isb();
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while (1)
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;
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}
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#endif
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#endif
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