+/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Wait for bit with timeout and ctrlc
*
* (C) Copyright 2015 Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#ifndef __WAIT_BIT_H
#define __WAIT_BIT_H
-#include <common.h>
#include <console.h>
+#include <log.h>
+#include <time.h>
#include <watchdog.h>
+#include <linux/delay.h>
#include <linux/errno.h>
#include <asm/io.h>
/**
- * wait_for_bit() waits for bit set/cleared in register
- *
- * Function polls register waiting for specific bit(s) change
- * (either 0->1 or 1->0). It can fail under two conditions:
- * - Timeout
- * - User interaction (CTRL-C)
- * Function succeeds only if all bits of masked register are set/cleared
- * (depending on set option).
- *
- * @param prefix Prefix added to timeout messagge (message visible only
- * with debug enabled)
- * @param reg Register that will be read (using readl())
- * @param mask Bit(s) of register that must be active
- * @param set Selects wait condition (bit set or clear)
- * @param timeout_ms Timeout (in miliseconds)
- * @param breakable Enables CTRL-C interruption
- * @return 0 on success, -ETIMEDOUT or -EINTR on failure
- */
-static inline int wait_for_bit(const char *prefix, const u32 *reg,
- const u32 mask, const bool set,
- const unsigned int timeout_ms,
- const bool breakable)
-{
- u32 val;
- unsigned long start = get_timer(0);
-
- while (1) {
- val = readl(reg);
-
- if (!set)
- val = ~val;
-
- if ((val & mask) == mask)
- return 0;
-
- if (get_timer(start) > timeout_ms)
- break;
-
- if (breakable && ctrlc()) {
- puts("Abort\n");
- return -EINTR;
- }
-
- udelay(1);
- WATCHDOG_RESET();
- }
-
- debug("%s: Timeout (reg=%p mask=%08x wait_set=%i)\n", prefix, reg, mask,
- set);
-
- return -ETIMEDOUT;
-}
-
-/**
* wait_for_bit_x() waits for bit set/cleared in register
*
* Function polls register waiting for specific bit(s) change
* @param set Selects wait condition (bit set or clear)
* @param timeout_ms Timeout (in milliseconds)
* @param breakable Enables CTRL-C interruption
- * @return 0 on success, -ETIMEDOUT or -EINTR on failure
+ * Return: 0 on success, -ETIMEDOUT or -EINTR on failure
*/
#define BUILD_WAIT_FOR_BIT(sfx, type, read) \
} \
\
udelay(1); \
- WATCHDOG_RESET(); \
+ schedule(); \
} \
\
debug("%s: Timeout (reg=%p mask=%x wait_set=%i)\n", __func__, \
BUILD_WAIT_FOR_BIT(8, u8, readb)
BUILD_WAIT_FOR_BIT(le16, u16, readw)
+BUILD_WAIT_FOR_BIT(16, u16, readw)
#ifdef readw_be
BUILD_WAIT_FOR_BIT(be16, u16, readw_be)
#endif
BUILD_WAIT_FOR_BIT(le32, u32, readl)
+BUILD_WAIT_FOR_BIT(32, u32, readl)
#ifdef readl_be
BUILD_WAIT_FOR_BIT(be32, u32, readl_be)
#endif