[people/ms/u-boot.git] / post / board / lwmon5 / watchdog.c

/*
 * (C) Copyright 2008 Dmitry Rakhchev, EmCraft Systems, rda@emcraft.com
 *
 * Developed for DENX Software Engineering GmbH
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>

/* This test verifies if the reason of last reset was an abnormal voltage
 * condition, than it performs watchdog test, measuing time required to
 * trigger watchdog reset.
 */

#include <post.h>

#if CONFIG_POST & CONFIG_SYS_POST_WATCHDOG

#include <watchdog.h>
#include <asm/ppc4xx-gpio.h>
#include <asm/io.h>

static uint watchdog_magic_read(void)
{
	return in_be32((void *)CONFIG_SYS_WATCHDOG_FLAGS_ADDR) &
		CONFIG_SYS_WATCHDOG_MAGIC_MASK;
}

static void watchdog_magic_write(uint value)
{
	out_be32((void *)CONFIG_SYS_WATCHDOG_FLAGS_ADDR, value |
		(in_be32((void *)CONFIG_SYS_WATCHDOG_FLAGS_ADDR) &
			~CONFIG_SYS_WATCHDOG_MAGIC_MASK));
}

int sysmon1_post_test(int flags)
{
	if (gpio_read_in_bit(CONFIG_SYS_GPIO_SYSMON_STATUS) == 0) {
		/*
		 * 3.1. GPIO62 is low
		 * Assuming system voltage failure.
		 */
		post_log("sysmon1 Abnormal voltage detected (GPIO62)\n");
		post_log("POST sysmon1 FAILED\n");
		return 1;
	} else {
		post_log("sysmon1 PASSED\n");
	}

	return 0;
}

int lwmon5_watchdog_post_test(int flags)
{
	/* On each reset scratch register 1 should be tested,
	 * but first test GPIO62:
	 */
	if (!(flags & POST_MANUAL) && sysmon1_post_test(flags)) {
		/* 3.1. GPIO62 is low
		 * Assuming system voltage failure.
		 */
		/* 3.1.1. Set scratch register 1 to 0x0000xxxx */
		watchdog_magic_write(0);
		/* 3.1.2. Mark test as failed due to voltage?! */
		return 1;
	}

	if (watchdog_magic_read() != CONFIG_SYS_WATCHDOG_MAGIC) {
		/* 3.2. Scratch register 1 differs from magic value 0x1248xxxx
		 * Assuming PowerOn
		 */
		int ints;
		ulong base;
		ulong time;

		/* 3.2.1. Set magic value to scratch register */
		watchdog_magic_write(CONFIG_SYS_WATCHDOG_MAGIC);

		ints = disable_interrupts ();
		/* 3.2.2. strobe watchdog once */
		WATCHDOG_RESET();
		out_be32((void *)CONFIG_SYS_WATCHDOG_TIME_ADDR, 0);
		/* 3.2.3. save time of strobe in scratch register 2 */
		base = post_time_ms (0);

		/* 3.2.4. Wait for 150 ms (enough for reset to happen) */
		while ((time = post_time_ms (base)) < 150)
			out_be32((void *)CONFIG_SYS_WATCHDOG_TIME_ADDR, time);
		if (ints)
			enable_interrupts ();

		/* 3.2.5. Reset didn't happen. - Set 0x0000xxxx
		 * into scratch register 1
		 */
		watchdog_magic_write(0);
		/* 3.2.6. Mark test as failed. */
		post_log("hw watchdog time : %u ms, failed ", time);
		return 2;
	} else {
		/* 3.3. Scratch register matches magic value 0x1248xxxx
		 * Assume this is watchdog-initiated reset
		 */
		ulong time;
		/* 3.3.1. So, the test succeed, save measured time to syslog. */
		time = in_be32((void *)CONFIG_SYS_WATCHDOG_TIME_ADDR);
		if (time > 90 ) { /* ms*/
			post_log("hw watchdog time : %u ms, passed ", time);
			/* 3.3.2. Set scratch register 1 to 0x0000xxxx */
			watchdog_magic_write(0);
			return 0;
		} else {
			/*test minimum watchdogtime */
			post_log("hw watchdog time : %u ms, failed ", time);
			return 2;
		}
	}
	return -1;
}

#endif /* CONFIG_POST & CONFIG_SYS_POST_WATCHDOG */
Commit	Line	Data
8f15d4ad YT	1	/*
	2	* (C) Copyright 2008 Dmitry Rakhchev, EmCraft Systems, rda@emcraft.com
	3	*
	4	* Developed for DENX Software Engineering GmbH
	5	*
1a459660	6	* SPDX-License-Identifier: GPL-2.0+
8f15d4ad YT	7	*/
	8
	9	#include <common.h>
	10
65b20dce	11	/* This test verifies if the reason of last reset was an abnormal voltage
8f15d4ad YT	12	* condition, than it performs watchdog test, measuing time required to
	13	* trigger watchdog reset.
	14	*/
	15
8f15d4ad YT	16	#include <post.h>
8f15d4ad YT	17
6d0f6bcf	18	#if CONFIG_POST & CONFIG_SYS_POST_WATCHDOG
8f15d4ad YT	19
8f15d4ad YT	20	#include <watchdog.h>
09887762	21	#include <asm/ppc4xx-gpio.h>
8f15d4ad YT	22	#include <asm/io.h>
	23
	24	static uint watchdog_magic_read(void)
	25	{
6d0f6bcf JCPV	26	return in_be32((void *)CONFIG_SYS_WATCHDOG_FLAGS_ADDR) &
6d0f6bcf JCPV	27	CONFIG_SYS_WATCHDOG_MAGIC_MASK;
8f15d4ad YT	28	}
	29
	30	static void watchdog_magic_write(uint value)
	31	{
6d0f6bcf JCPV	32	out_be32((void *)CONFIG_SYS_WATCHDOG_FLAGS_ADDR, value \|
	33	(in_be32((void *)CONFIG_SYS_WATCHDOG_FLAGS_ADDR) &
	34	~CONFIG_SYS_WATCHDOG_MAGIC_MASK));
8f15d4ad YT	35	}
	36
	37	int sysmon1_post_test(int flags)
	38	{
6d0f6bcf	39	if (gpio_read_in_bit(CONFIG_SYS_GPIO_SYSMON_STATUS) == 0) {
3e4615ab SL	40	/*
3e4615ab SL	41	* 3.1. GPIO62 is low
8f15d4ad YT	42	* Assuming system voltage failure.
8f15d4ad YT	43	*/
f14ae418 SL	44	post_log("sysmon1 Abnormal voltage detected (GPIO62)\n");
f14ae418 SL	45	post_log("POST sysmon1 FAILED\n");
8f15d4ad	46	return 1;
f14ae418 SL	47	} else {
f14ae418 SL	48	post_log("sysmon1 PASSED\n");
8f15d4ad YT	49	}
	50
	51	return 0;
	52	}
	53
	54	int lwmon5_watchdog_post_test(int flags)
	55	{
	56	/* On each reset scratch register 1 should be tested,
	57	* but first test GPIO62:
	58	*/
	59	if (!(flags & POST_MANUAL) && sysmon1_post_test(flags)) {
65b20dce	60	/* 3.1. GPIO62 is low
8f15d4ad YT	61	* Assuming system voltage failure.
	62	*/
	63	/* 3.1.1. Set scratch register 1 to 0x0000xxxx */
	64	watchdog_magic_write(0);
	65	/* 3.1.2. Mark test as failed due to voltage?! */
	66	return 1;
	67	}
	68
6d0f6bcf	69	if (watchdog_magic_read() != CONFIG_SYS_WATCHDOG_MAGIC) {
65b20dce	70	/* 3.2. Scratch register 1 differs from magic value 0x1248xxxx
8f15d4ad YT	71	* Assuming PowerOn
	72	*/
	73	int ints;
	74	ulong base;
65b20dce	75	ulong time;
8f15d4ad YT	76
8f15d4ad YT	77	/* 3.2.1. Set magic value to scratch register */
6d0f6bcf	78	watchdog_magic_write(CONFIG_SYS_WATCHDOG_MAGIC);
8f15d4ad YT	79
	80	ints = disable_interrupts ();
	81	/* 3.2.2. strobe watchdog once */
	82	WATCHDOG_RESET();
6d0f6bcf	83	out_be32((void *)CONFIG_SYS_WATCHDOG_TIME_ADDR, 0);
8f15d4ad YT	84	/* 3.2.3. save time of strobe in scratch register 2 */
	85	base = post_time_ms (0);
	86
	87	/* 3.2.4. Wait for 150 ms (enough for reset to happen) */
	88	while ((time = post_time_ms (base)) < 150)
6d0f6bcf	89	out_be32((void *)CONFIG_SYS_WATCHDOG_TIME_ADDR, time);
8f15d4ad YT	90	if (ints)
	91	enable_interrupts ();
	92
65b20dce	93	/* 3.2.5. Reset didn't happen. - Set 0x0000xxxx
8f15d4ad YT	94	* into scratch register 1
	95	*/
	96	watchdog_magic_write(0);
	97	/* 3.2.6. Mark test as failed. */
	98	post_log("hw watchdog time : %u ms, failed ", time);
	99	return 2;
65b20dce YT	100	} else {
	101	/* 3.3. Scratch register matches magic value 0x1248xxxx
	102	* Assume this is watchdog-initiated reset
	103	*/
	104	ulong time;
	105	/* 3.3.1. So, the test succeed, save measured time to syslog. */
6d0f6bcf	106	time = in_be32((void *)CONFIG_SYS_WATCHDOG_TIME_ADDR);
f14ae418 SL	107	if (time > 90 ) { /* ms*/
	108	post_log("hw watchdog time : %u ms, passed ", time);
	109	/* 3.3.2. Set scratch register 1 to 0x0000xxxx */
	110	watchdog_magic_write(0);
	111	return 0;
	112	} else {
	113	/test minimum watchdogtime /
	114	post_log("hw watchdog time : %u ms, failed ", time);
	115	return 2;
	116	}
8f15d4ad	117	}
65b20dce	118	return -1;
81a0ac62	119	}
8f15d4ad	120
6d0f6bcf	121	#endif /* CONFIG_POST & CONFIG_SYS_POST_WATCHDOG */