Coverage Report

Created: 2026-03-11 06:21

next uncovered line (L), next uncovered region (R), next uncovered branch (B)
/src/u-boot/drivers/watchdog/ftwdt010_wdt.c
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// SPDX-License-Identifier: GPL-2.0+
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/*
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 * Watchdog driver for the FTWDT010 Watch Dog Driver
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 *
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 * (c) Copyright 2004 Faraday Technology Corp. (www.faraday-tech.com)
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 * Based on sa1100_wdt.c by Oleg Drokin <green@crimea.edu>
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 * Based on SoftDog driver by Alan Cox <alan@redhat.com>
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 *
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 * Copyright (C) 2011 Andes Technology Corporation
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 * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
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 *
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 * 27/11/2004 Initial release, Faraday.
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 * 12/01/2011 Port to u-boot, Macpaul Lin.
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 * 22/08/2022 Port to DM
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 */
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#include <dm.h>
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#include <wdt.h>
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#include <log.h>
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#include <asm/io.h>
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#include <faraday/ftwdt010_wdt.h>
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struct ftwdt010_wdt_priv {
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  struct ftwdt010_wdt __iomem *regs;
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};
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static int ftwdt010_wdt_reset(struct udevice *dev)
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0
{
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  struct ftwdt010_wdt_priv *priv = dev_get_priv(dev);
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  struct ftwdt010_wdt *wd = priv->regs;
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  debug("Reset WDT..\n");
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  /* clear control register */
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  writel(0, &wd->wdcr);
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  /* Write Magic number */
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  writel(FTWDT010_WDRESTART_MAGIC, &wd->wdrestart);
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  /* Enable WDT */
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  writel(FTWDT010_WDCR_RST | FTWDT010_WDCR_ENABLE, &wd->wdcr);
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  return 0;
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0
}
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/*
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 * Set the watchdog time interval and start the timer.
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 * Counter is 32 bit.
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 */
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static int ftwdt010_wdt_start(struct udevice *dev, u64 timeout_ms, ulong flags)
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0
{
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  struct ftwdt010_wdt_priv *priv = dev_get_priv(dev);
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  struct ftwdt010_wdt *wd = priv->regs;
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  unsigned int reg;
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  debug("Activating WDT %llu ms\n", timeout_ms);
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  /* Check if disabled */
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  if (readl(&wd->wdcr) & ~FTWDT010_WDCR_ENABLE) {
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    printf("sorry, watchdog is disabled\n");
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    return -1;
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0
  }
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  /*
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   * In a 66MHz system,
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   * if you set WDLOAD as 0x03EF1480 (66000000)
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   * the reset timer is 1 second.
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   */
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  reg = FTWDT010_WDLOAD(timeout_ms * FTWDT010_TIMEOUT_FACTOR);
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  writel(reg, &wd->wdload);
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  return ftwdt010_wdt_reset(dev);
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0
}
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static int ftwdt010_wdt_stop(struct udevice *dev)
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0
{
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  struct ftwdt010_wdt_priv *priv = dev_get_priv(dev);
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  struct ftwdt010_wdt *wd = priv->regs;
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  debug("Deactivating WDT..\n");
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  /*
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   * It was defined with CONFIG_WATCHDOG_NOWAYOUT in Linux
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   *
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   * Shut off the timer.
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   * Lock it in if it's a module and we defined ...NOWAYOUT
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   */
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  writel(0, &wd->wdcr);
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  return 0;
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0
}
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static int ftwdt010_wdt_expire_now(struct udevice *dev, ulong flags)
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0
{
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  struct ftwdt010_wdt_priv *priv = dev_get_priv(dev);
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  struct ftwdt010_wdt *wd = priv->regs;
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  debug("Expiring WDT..\n");
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  writel(FTWDT010_WDLOAD(0), &wd->wdload);
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  return ftwdt010_wdt_reset(dev);
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0
}
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static int ftwdt010_wdt_probe(struct udevice *dev)
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0
{
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  struct ftwdt010_wdt_priv *priv = dev_get_priv(dev);
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  priv->regs = dev_read_addr_ptr(dev);
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  if (!priv->regs)
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    return -EINVAL;
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  return 0;
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0
}
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static const struct wdt_ops ftwdt010_wdt_ops = {
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  .start = ftwdt010_wdt_start,
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  .reset = ftwdt010_wdt_reset,
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  .stop = ftwdt010_wdt_stop,
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  .expire_now = ftwdt010_wdt_expire_now,
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};
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static const struct udevice_id ftwdt010_wdt_ids[] = {
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  { .compatible = "faraday,ftwdt010" },
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  {}
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};
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U_BOOT_DRIVER(ftwdt010_wdt) = {
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  .name = "ftwdt010_wdt",
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  .id = UCLASS_WDT,
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  .of_match = ftwdt010_wdt_ids,
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  .ops = &ftwdt010_wdt_ops,
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  .probe = ftwdt010_wdt_probe,
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  .priv_auto = sizeof(struct ftwdt010_wdt_priv),
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};