mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-05 02:51:00 +00:00
3bb917ee3b
The last user of the NEEDS_MANUAL_RELOC has been removed in commit
26af162ac8
("arch: m68k: Implement relocation")
Remove now unused NEEDS_MANUAL_RELOC code.
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
278 lines
5.5 KiB
C
278 lines
5.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2017 Google, Inc
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*/
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#define LOG_CATEGORY UCLASS_WDT
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#include <common.h>
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#include <cyclic.h>
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#include <dm.h>
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#include <errno.h>
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#include <hang.h>
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#include <log.h>
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#include <sysreset.h>
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#include <time.h>
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#include <wdt.h>
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#include <asm/global_data.h>
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#include <dm/device-internal.h>
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#include <dm/lists.h>
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DECLARE_GLOBAL_DATA_PTR;
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#define WATCHDOG_TIMEOUT_SECS (CONFIG_WATCHDOG_TIMEOUT_MSECS / 1000)
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struct wdt_priv {
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/* Timeout, in seconds, to configure this device to. */
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u32 timeout;
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/*
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* Time, in milliseconds, between calling the device's ->reset()
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* method from watchdog_reset().
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*/
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ulong reset_period;
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/*
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* Next time (as returned by get_timer(0)) to call
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* ->reset().
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*/
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ulong next_reset;
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/* Whether watchdog_start() has been called on the device. */
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bool running;
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/* autostart */
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bool autostart;
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struct cyclic_info *cyclic;
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};
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static void wdt_cyclic(void *ctx)
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{
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struct udevice *dev = ctx;
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struct wdt_priv *priv;
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if (!device_active(dev))
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return;
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priv = dev_get_uclass_priv(dev);
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if (!priv->running)
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return;
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wdt_reset(dev);
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}
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static void init_watchdog_dev(struct udevice *dev)
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{
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struct wdt_priv *priv;
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int ret;
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priv = dev_get_uclass_priv(dev);
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if (IS_ENABLED(CONFIG_SYSRESET_WATCHDOG_AUTO)) {
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ret = sysreset_register_wdt(dev);
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if (ret)
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printf("WDT: Failed to register %s for sysreset\n",
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dev->name);
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}
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if (!priv->autostart) {
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printf("WDT: Not starting %s\n", dev->name);
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return;
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}
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ret = wdt_start(dev, priv->timeout * 1000, 0);
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if (ret != 0) {
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printf("WDT: Failed to start %s\n", dev->name);
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return;
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}
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}
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int initr_watchdog(void)
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{
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struct udevice *dev;
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struct uclass *uc;
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int ret;
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ret = uclass_get(UCLASS_WDT, &uc);
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if (ret) {
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log_debug("Error getting UCLASS_WDT: %d\n", ret);
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return 0;
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}
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uclass_foreach_dev(dev, uc) {
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ret = device_probe(dev);
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if (ret) {
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log_debug("Error probing %s: %d\n", dev->name, ret);
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continue;
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}
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init_watchdog_dev(dev);
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}
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return 0;
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}
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int wdt_start(struct udevice *dev, u64 timeout_ms, ulong flags)
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{
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const struct wdt_ops *ops = device_get_ops(dev);
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int ret;
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if (!ops->start)
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return -ENOSYS;
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ret = ops->start(dev, timeout_ms, flags);
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if (ret == 0) {
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struct wdt_priv *priv = dev_get_uclass_priv(dev);
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char str[16];
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priv->running = true;
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memset(str, 0, 16);
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if (IS_ENABLED(CONFIG_WATCHDOG)) {
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/* Register the watchdog driver as a cyclic function */
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priv->cyclic = cyclic_register(wdt_cyclic,
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priv->reset_period * 1000,
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dev->name, dev);
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if (!priv->cyclic) {
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printf("cyclic_register for %s failed\n",
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dev->name);
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return -ENODEV;
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} else {
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snprintf(str, 16, "every %ldms",
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priv->reset_period);
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}
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}
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printf("WDT: Started %s with%s servicing %s (%ds timeout)\n",
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dev->name, IS_ENABLED(CONFIG_WATCHDOG) ? "" : "out",
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str, priv->timeout);
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}
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return ret;
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}
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int wdt_stop(struct udevice *dev)
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{
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const struct wdt_ops *ops = device_get_ops(dev);
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int ret;
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if (!ops->stop)
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return -ENOSYS;
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ret = ops->stop(dev);
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if (ret == 0) {
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struct wdt_priv *priv = dev_get_uclass_priv(dev);
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priv->running = false;
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}
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return ret;
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}
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int wdt_stop_all(void)
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{
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struct wdt_priv *priv;
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struct udevice *dev;
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struct uclass *uc;
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int ret, err;
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ret = uclass_get(UCLASS_WDT, &uc);
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if (ret)
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return ret;
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uclass_foreach_dev(dev, uc) {
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if (!device_active(dev))
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continue;
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priv = dev_get_uclass_priv(dev);
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if (!priv->running)
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continue;
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err = wdt_stop(dev);
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if (!ret)
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ret = err;
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}
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return ret;
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}
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int wdt_reset(struct udevice *dev)
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{
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const struct wdt_ops *ops = device_get_ops(dev);
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if (!ops->reset)
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return -ENOSYS;
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return ops->reset(dev);
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}
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int wdt_expire_now(struct udevice *dev, ulong flags)
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{
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int ret = 0;
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const struct wdt_ops *ops;
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debug("WDT Resetting: %lu\n", flags);
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ops = device_get_ops(dev);
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if (ops->expire_now) {
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return ops->expire_now(dev, flags);
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} else {
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ret = wdt_start(dev, 1, flags);
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if (ret < 0)
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return ret;
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hang();
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}
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return ret;
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}
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#if defined(CONFIG_WATCHDOG)
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/*
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* Called by macro WATCHDOG_RESET. This function be called *very* early,
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* so we need to make sure, that the watchdog driver is ready before using
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* it in this function.
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*/
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void watchdog_reset(void)
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{
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/*
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* Empty function for now. The actual WDT handling is now done in
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* the cyclic function instead.
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*/
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}
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#endif
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static int wdt_pre_probe(struct udevice *dev)
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{
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u32 timeout = WATCHDOG_TIMEOUT_SECS;
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/*
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* Reset every 1000ms, or however often is required as
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* indicated by a hw_margin_ms property.
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*/
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ulong reset_period = 1000;
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bool autostart = IS_ENABLED(CONFIG_WATCHDOG_AUTOSTART);
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struct wdt_priv *priv;
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if (CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)) {
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timeout = dev_read_u32_default(dev, "timeout-sec", timeout);
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reset_period = dev_read_u32_default(dev, "hw_margin_ms",
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4 * reset_period) / 4;
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if (dev_read_bool(dev, "u-boot,noautostart"))
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autostart = false;
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else if (dev_read_bool(dev, "u-boot,autostart"))
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autostart = true;
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}
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priv = dev_get_uclass_priv(dev);
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priv->timeout = timeout;
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priv->reset_period = reset_period;
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priv->autostart = autostart;
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/*
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* Pretend this device was last reset "long" ago so the first
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* watchdog_reset will actually call its ->reset method.
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*/
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priv->next_reset = get_timer(0);
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return 0;
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}
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UCLASS_DRIVER(wdt) = {
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.id = UCLASS_WDT,
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.name = "watchdog",
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.flags = DM_UC_FLAG_SEQ_ALIAS,
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.pre_probe = wdt_pre_probe,
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.per_device_auto = sizeof(struct wdt_priv),
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};
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