mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-05 02:36:39 +09:00
2a07269062
If U-Boot is started from SPL or TPL, then those earlier phases deal with the reset cause. On real hardware this cause may be lost once it is read. Emulate that behaviour in sandbox by reporting a warm reset when a previous phase has run since start-up. Signed-off-by: Simon Glass <sjg@chromium.org>
136 lines
3.0 KiB
C
136 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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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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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <sysreset.h>
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#include <asm/state.h>
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#include <asm/test.h>
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static int sandbox_warm_sysreset_request(struct udevice *dev,
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enum sysreset_t type)
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{
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struct sandbox_state *state = state_get_current();
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switch (type) {
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case SYSRESET_WARM:
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state->last_sysreset = type;
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break;
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default:
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return -ENOSYS;
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}
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if (!state->sysreset_allowed[type])
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return -EACCES;
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return -EINPROGRESS;
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}
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int sandbox_warm_sysreset_get_status(struct udevice *dev, char *buf, int size)
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{
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strlcpy(buf, "Reset Status: WARM", size);
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return 0;
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}
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int sandbox_warm_sysreset_get_last(struct udevice *dev)
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{
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return SYSRESET_WARM;
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}
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static int sandbox_sysreset_request(struct udevice *dev, enum sysreset_t type)
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{
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struct sandbox_state *state = state_get_current();
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/*
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* If we have a device tree, the device we created from platform data
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* (see the U_BOOT_DEVICE() declaration below) should not do anything.
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* If we are that device, return an error.
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*/
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if (state->fdt_fname && !dev_of_valid(dev))
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return -ENODEV;
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switch (type) {
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case SYSRESET_COLD:
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state->last_sysreset = type;
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break;
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case SYSRESET_POWER:
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state->last_sysreset = type;
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if (!state->sysreset_allowed[type])
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return -EACCES;
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sandbox_exit();
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break;
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case SYSRESET_POWER_OFF:
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if (!state->sysreset_allowed[type])
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return -EACCES;
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default:
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return -ENOSYS;
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}
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if (!state->sysreset_allowed[type])
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return -EACCES;
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return -EINPROGRESS;
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}
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int sandbox_sysreset_get_status(struct udevice *dev, char *buf, int size)
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{
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strlcpy(buf, "Reset Status: COLD", size);
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return 0;
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}
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int sandbox_sysreset_get_last(struct udevice *dev)
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{
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struct sandbox_state *state = state_get_current();
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/*
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* The first phase is a power reset, after that we assume we don't
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* know.
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*/
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return state->jumped_fname ? SYSRESET_WARM : SYSRESET_POWER;
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}
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static struct sysreset_ops sandbox_sysreset_ops = {
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.request = sandbox_sysreset_request,
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.get_status = sandbox_sysreset_get_status,
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.get_last = sandbox_sysreset_get_last,
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};
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static const struct udevice_id sandbox_sysreset_ids[] = {
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{ .compatible = "sandbox,reset" },
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{ }
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};
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U_BOOT_DRIVER(sysreset_sandbox) = {
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.name = "sysreset_sandbox",
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.id = UCLASS_SYSRESET,
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.of_match = sandbox_sysreset_ids,
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.ops = &sandbox_sysreset_ops,
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};
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static struct sysreset_ops sandbox_warm_sysreset_ops = {
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.request = sandbox_warm_sysreset_request,
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.get_status = sandbox_warm_sysreset_get_status,
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.get_last = sandbox_warm_sysreset_get_last,
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};
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static const struct udevice_id sandbox_warm_sysreset_ids[] = {
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{ .compatible = "sandbox,warm-reset" },
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{ }
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};
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U_BOOT_DRIVER(warm_sysreset_sandbox) = {
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.name = "warm_sysreset_sandbox",
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.id = UCLASS_SYSRESET,
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.of_match = sandbox_warm_sysreset_ids,
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.ops = &sandbox_warm_sysreset_ops,
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};
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/* This is here in case we don't have a device tree */
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U_BOOT_DEVICE(sysreset_sandbox_non_fdt) = {
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.name = "sysreset_sandbox",
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};
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