[mirror_ubuntu-kernels.git] / arch / parisc / kernel / pdc_chassis.c

// SPDX-License-Identifier: GPL-2.0-only
/* 
 *    interfaces to Chassis Codes via PDC (firmware)
 *
 *    Copyright (C) 2002 Laurent Canet <canetl@esiee.fr>
 *    Copyright (C) 2002-2006 Thibaut VARENE <varenet@parisc-linux.org>
 *
 *    TODO: poll chassis warns, trigger (configurable) machine shutdown when
 *    		needed.
 *    	    Find out how to get Chassis warnings out of PAT boxes?
 */

#undef PDC_CHASSIS_DEBUG
#ifdef PDC_CHASSIS_DEBUG
#define DPRINTK(fmt, args...)	printk(fmt, ## args)
#else
#define DPRINTK(fmt, args...)
#endif

#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/panic_notifier.h>
#include <linux/reboot.h>
#include <linux/notifier.h>
#include <linux/cache.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>

#include <asm/pdc_chassis.h>
#include <asm/processor.h>
#include <asm/pdc.h>
#include <asm/pdcpat.h>

#define PDC_CHASSIS_VER	"0.05"

#ifdef CONFIG_PDC_CHASSIS
static unsigned int pdc_chassis_enabled __read_mostly = 1;


/**
 * pdc_chassis_setup() - Enable/disable pdc_chassis code at boot time.
 * @str: configuration param: 0 to disable chassis log
 * @return 1
 */
 
static int __init pdc_chassis_setup(char *str)
{
	/*panic_timeout = simple_strtoul(str, NULL, 0);*/
	get_option(&str, &pdc_chassis_enabled);
	return 1;
}
__setup("pdcchassis=", pdc_chassis_setup);


/** 
 * pdc_chassis_checkold() - Checks for old PDC_CHASSIS compatibility
 * 
 * Currently, only E class and A180 are known to work with this.
 * Inspired by Christoph Plattner
 */
#if 0
static void __init pdc_chassis_checkold(void)
{
	switch(CPU_HVERSION) {
		case 0x480:		/* E25 */
		case 0x481:		/* E35 */
		case 0x482:		/* E45 */
		case 0x483:		/* E55 */
		case 0x516:		/* A180 */
			break;

		default:
			break;
	}
	DPRINTK(KERN_DEBUG "%s: pdc_chassis_checkold(); pdc_chassis_old = %d\n", __FILE__, pdc_chassis_old);
}
#endif

/**
 * pdc_chassis_panic_event() - Called by the panic handler.
 * @this: unused
 * @event: unused
 * @ptr: unused
 *
 * As soon as a panic occurs, we should inform the PDC.
 */

static int pdc_chassis_panic_event(struct notifier_block *this,
		        unsigned long event, void *ptr)
{
	pdc_chassis_send_status(PDC_CHASSIS_DIRECT_PANIC);
	return NOTIFY_DONE;
}   


static struct notifier_block pdc_chassis_panic_block = {
	.notifier_call = pdc_chassis_panic_event,
	.priority = INT_MAX,
};


/**
 * pdc_chassis_reboot_event() - Called by the reboot handler.
 * @this: unused
 * @event: unused
 * @ptr: unused
 *
 * As soon as a reboot occurs, we should inform the PDC.
 */

static int pdc_chassis_reboot_event(struct notifier_block *this,
		        unsigned long event, void *ptr)
{
	pdc_chassis_send_status(PDC_CHASSIS_DIRECT_SHUTDOWN);
	return NOTIFY_DONE;
}   


static struct notifier_block pdc_chassis_reboot_block = {
	.notifier_call = pdc_chassis_reboot_event,
	.priority = INT_MAX,
};
#endif /* CONFIG_PDC_CHASSIS */


/**
 * parisc_pdc_chassis_init() - Called at boot time.
 */

void __init parisc_pdc_chassis_init(void)
{
#ifdef CONFIG_PDC_CHASSIS
	if (likely(pdc_chassis_enabled)) {
		DPRINTK(KERN_DEBUG "%s: parisc_pdc_chassis_init()\n", __FILE__);

		/* Let see if we have something to handle... */
		printk(KERN_INFO "Enabling %s chassis codes support v%s\n",
				is_pdc_pat() ? "PDC_PAT" : "regular",
				PDC_CHASSIS_VER);

		/* initialize panic notifier chain */
		atomic_notifier_chain_register(&panic_notifier_list,
				&pdc_chassis_panic_block);

		/* initialize reboot notifier chain */
		register_reboot_notifier(&pdc_chassis_reboot_block);
	}
#endif /* CONFIG_PDC_CHASSIS */
}


/** 
 * pdc_chassis_send_status() - Sends a predefined message to the chassis,
 * and changes the front panel LEDs according to the new system state
 * @message: Type of message, one of PDC_CHASSIS_DIRECT_* values.
 *
 * Only machines with 64 bits PDC PAT and those reported in
 * pdc_chassis_checkold() are supported atm.
 * 
 * returns 0 if no error, -1 if no supported PDC is present or invalid message,
 * else returns the appropriate PDC error code.
 * 
 * For a list of predefined messages, see asm-parisc/pdc_chassis.h
 */

int pdc_chassis_send_status(int message)
{
	/* Maybe we should do that in an other way ? */
	int retval = 0;
#ifdef CONFIG_PDC_CHASSIS
	if (likely(pdc_chassis_enabled)) {

		DPRINTK(KERN_DEBUG "%s: pdc_chassis_send_status(%d)\n", __FILE__, message);

#ifdef CONFIG_64BIT
		if (is_pdc_pat()) {
			switch(message) {
				case PDC_CHASSIS_DIRECT_BSTART:
					retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_BSTART, PDC_CHASSIS_LSTATE_RUN_NORMAL);
					break;

				case PDC_CHASSIS_DIRECT_BCOMPLETE:
					retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_BCOMPLETE, PDC_CHASSIS_LSTATE_RUN_NORMAL);
					break;

				case PDC_CHASSIS_DIRECT_SHUTDOWN:
					retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_SHUTDOWN, PDC_CHASSIS_LSTATE_NONOS);
					break;

				case PDC_CHASSIS_DIRECT_PANIC:
					retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_PANIC, PDC_CHASSIS_LSTATE_RUN_CRASHREC);
					break;

				case PDC_CHASSIS_DIRECT_LPMC:
					retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_LPMC, PDC_CHASSIS_LSTATE_RUN_SYSINT);
					break;

				case PDC_CHASSIS_DIRECT_HPMC:
					retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_HPMC, PDC_CHASSIS_LSTATE_RUN_NCRIT);
					break;

				default:
					retval = -1;
			}
		} else retval = -1;
#else
		if (1) {
			switch (message) {
				case PDC_CHASSIS_DIRECT_BSTART:
					retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_INIT));
					break;

				case PDC_CHASSIS_DIRECT_BCOMPLETE:
					retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_RUN));
					break;

				case PDC_CHASSIS_DIRECT_SHUTDOWN:
					retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_SHUT));
					break;

				case PDC_CHASSIS_DIRECT_HPMC:
				case PDC_CHASSIS_DIRECT_PANIC:
					retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_FLT));
					break;

				case PDC_CHASSIS_DIRECT_LPMC:
					retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_WARN));
					break;

				default:
					retval = -1;
			}
		} else retval = -1;
#endif /* CONFIG_64BIT */
	}	/* if (pdc_chassis_enabled) */
#endif /* CONFIG_PDC_CHASSIS */
	return retval;
}

#ifdef CONFIG_PDC_CHASSIS_WARN
#ifdef CONFIG_PROC_FS
static int pdc_chassis_warn_show(struct seq_file *m, void *v)
{
	unsigned long warn;
	u32 warnreg;

	if (pdc_chassis_warn(&warn) != PDC_OK)
		return -EIO;

	warnreg = (warn & 0xFFFFFFFF);

	if ((warnreg >> 24) & 0xFF)
		seq_printf(m, "Chassis component failure! (eg fan or PSU): 0x%.2x\n",
			   (warnreg >> 24) & 0xFF);

	seq_printf(m, "Battery: %s\n", (warnreg & 0x04) ? "Low!" : "OK");
	seq_printf(m, "Temp low: %s\n", (warnreg & 0x02) ? "Exceeded!" : "OK");
	seq_printf(m, "Temp mid: %s\n", (warnreg & 0x01) ? "Exceeded!" : "OK");
	return 0;
}

static int __init pdc_chassis_create_procfs(void)
{
	unsigned long test;
	int ret;

	ret = pdc_chassis_warn(&test);
	if ((ret == PDC_BAD_PROC) || (ret == PDC_BAD_OPTION)) {
		/* seems that some boxes (eg L1000) do not implement this */
		printk(KERN_INFO "Chassis warnings not supported.\n");
		return 0;
	}

	printk(KERN_INFO "Enabling PDC chassis warnings support v%s\n",
			PDC_CHASSIS_VER);
	proc_create_single("chassis", 0400, NULL, pdc_chassis_warn_show);
	return 0;
}

__initcall(pdc_chassis_create_procfs);

#endif /* CONFIG_PROC_FS */
#endif /* CONFIG_PDC_CHASSIS_WARN */
Commit	Line	Data
45051539	1	// SPDX-License-Identifier: GPL-2.0-only
1da177e4	2	/*
8ffaeaf4	3	* interfaces to Chassis Codes via PDC (firmware)
1da177e4 LT	4	*
1da177e4 LT	5	* Copyright (C) 2002 Laurent Canet <canetl@esiee.fr>
8ffaeaf4	6	* Copyright (C) 2002-2006 Thibaut VARENE <varenet@parisc-linux.org>
1da177e4	7	*
8ffaeaf4 TV	8	* TODO: poll chassis warns, trigger (configurable) machine shutdown when
8ffaeaf4 TV	9	* needed.
9b0703fe	10	* Find out how to get Chassis warnings out of PAT boxes?
1da177e4 LT	11	*/
	12
	13	#undef PDC_CHASSIS_DEBUG
	14	#ifdef PDC_CHASSIS_DEBUG
	15	#define DPRINTK(fmt, args...) printk(fmt, ## args)
	16	#else
	17	#define DPRINTK(fmt, args...)
	18	#endif
	19
	20	#include <linux/init.h>
28ff1188	21	#include <linux/module.h>
1da177e4	22	#include <linux/kernel.h>
f39650de	23	#include <linux/panic_notifier.h>
1da177e4 LT	24	#include <linux/reboot.h>
1da177e4 LT	25	#include <linux/notifier.h>
8039de10	26	#include <linux/cache.h>
8ffaeaf4	27	#include <linux/proc_fs.h>
28ff1188	28	#include <linux/seq_file.h>
1da177e4 LT	29
	30	#include <asm/pdc_chassis.h>
	31	#include <asm/processor.h>
	32	#include <asm/pdc.h>
	33	#include <asm/pdcpat.h>
	34
9b0703fe	35	#define PDC_CHASSIS_VER "0.05"
1da177e4 LT	36
1da177e4 LT	37	#ifdef CONFIG_PDC_CHASSIS
8039de10	38	static unsigned int pdc_chassis_enabled __read_mostly = 1;
1da177e4 LT	39
	40
	41	/**
	42	* pdc_chassis_setup() - Enable/disable pdc_chassis code at boot time.
9872fb13	43	* @str: configuration param: 0 to disable chassis log
1da177e4 LT	44	* @return 1
	45	*/
	46
	47	static int __init pdc_chassis_setup(char *str)
	48	{
	49	/panic_timeout = simple_strtoul(str, NULL, 0);/
	50	get_option(&str, &pdc_chassis_enabled);
	51	return 1;
	52	}
	53	__setup("pdcchassis=", pdc_chassis_setup);
	54
	55
	56	/**
	57	* pdc_chassis_checkold() - Checks for old PDC_CHASSIS compatibility
1da177e4 LT	58	*
	59	* Currently, only E class and A180 are known to work with this.
	60	* Inspired by Christoph Plattner
	61	*/
8ffaeaf4	62	#if 0
1da177e4 LT	63	static void __init pdc_chassis_checkold(void)
	64	{
	65	switch(CPU_HVERSION) {
	66	case 0x480: /* E25 */
	67	case 0x481: /* E35 */
	68	case 0x482: /* E45 */
	69	case 0x483: /* E55 */
	70	case 0x516: /* A180 */
1da177e4 LT	71	break;
	72
	73	default:
	74	break;
	75	}
	76	DPRINTK(KERN_DEBUG "%s: pdc_chassis_checkold(); pdc_chassis_old = %d\n", __FILE__, pdc_chassis_old);
	77	}
8ffaeaf4	78	#endif
1da177e4 LT	79
	80	/**
	81	* pdc_chassis_panic_event() - Called by the panic handler.
9872fb13 HD	82	* @this: unused
	83	* @event: unused
	84	* @ptr: unused
1da177e4 LT	85	*
	86	* As soon as a panic occurs, we should inform the PDC.
	87	*/
	88
	89	static int pdc_chassis_panic_event(struct notifier_block *this,
	90	unsigned long event, void *ptr)
	91	{
	92	pdc_chassis_send_status(PDC_CHASSIS_DIRECT_PANIC);
9872fb13	93	return NOTIFY_DONE;
1da177e4 LT	94	}
	95
	96
	97	static struct notifier_block pdc_chassis_panic_block = {
	98	.notifier_call = pdc_chassis_panic_event,
	99	.priority = INT_MAX,
	100	};
	101
	102
	103	/**
9872fb13 HD	104	* pdc_chassis_reboot_event() - Called by the reboot handler.
	105	* @this: unused
	106	* @event: unused
	107	* @ptr: unused
1da177e4 LT	108	*
	109	* As soon as a reboot occurs, we should inform the PDC.
	110	*/
	111
	112	static int pdc_chassis_reboot_event(struct notifier_block *this,
	113	unsigned long event, void *ptr)
	114	{
	115	pdc_chassis_send_status(PDC_CHASSIS_DIRECT_SHUTDOWN);
9872fb13	116	return NOTIFY_DONE;
1da177e4 LT	117	}
	118
	119
	120	static struct notifier_block pdc_chassis_reboot_block = {
	121	.notifier_call = pdc_chassis_reboot_event,
	122	.priority = INT_MAX,
	123	};
	124	#endif /* CONFIG_PDC_CHASSIS */
	125
	126
	127	/**
	128	* parisc_pdc_chassis_init() - Called at boot time.
	129	*/
	130
	131	void __init parisc_pdc_chassis_init(void)
	132	{
	133	#ifdef CONFIG_PDC_CHASSIS
8039de10	134	if (likely(pdc_chassis_enabled)) {
1da177e4 LT	135	DPRINTK(KERN_DEBUG "%s: parisc_pdc_chassis_init()\n", __FILE__);
	136
	137	/* Let see if we have something to handle... */
9b0703fe TV	138	printk(KERN_INFO "Enabling %s chassis codes support v%s\n",
	139	is_pdc_pat() ? "PDC_PAT" : "regular",
	140	PDC_CHASSIS_VER);
	141
	142	/* initialize panic notifier chain */
	143	atomic_notifier_chain_register(&panic_notifier_list,
	144	&pdc_chassis_panic_block);
	145
	146	/* initialize reboot notifier chain */
	147	register_reboot_notifier(&pdc_chassis_reboot_block);
1da177e4 LT	148	}
	149	#endif /* CONFIG_PDC_CHASSIS */
	150	}
	151
	152
	153	/**
	154	* pdc_chassis_send_status() - Sends a predefined message to the chassis,
	155	* and changes the front panel LEDs according to the new system state
9872fb13	156	* @message: Type of message, one of PDC_CHASSIS_DIRECT_* values.
1da177e4 LT	157	*
	158	* Only machines with 64 bits PDC PAT and those reported in
	159	* pdc_chassis_checkold() are supported atm.
	160	*
	161	* returns 0 if no error, -1 if no supported PDC is present or invalid message,
	162	* else returns the appropriate PDC error code.
	163	*
	164	* For a list of predefined messages, see asm-parisc/pdc_chassis.h
	165	*/
	166
	167	int pdc_chassis_send_status(int message)
	168	{
	169	/* Maybe we should do that in an other way ? */
	170	int retval = 0;
	171	#ifdef CONFIG_PDC_CHASSIS
8039de10	172	if (likely(pdc_chassis_enabled)) {
1da177e4 LT	173
	174	DPRINTK(KERN_DEBUG "%s: pdc_chassis_send_status(%d)\n", __FILE__, message);
	175
	176	#ifdef CONFIG_64BIT
	177	if (is_pdc_pat()) {
	178	switch(message) {
	179	case PDC_CHASSIS_DIRECT_BSTART:
	180	retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_BSTART, PDC_CHASSIS_LSTATE_RUN_NORMAL);
	181	break;
	182
	183	case PDC_CHASSIS_DIRECT_BCOMPLETE:
	184	retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_BCOMPLETE, PDC_CHASSIS_LSTATE_RUN_NORMAL);
	185	break;
	186
	187	case PDC_CHASSIS_DIRECT_SHUTDOWN:
	188	retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_SHUTDOWN, PDC_CHASSIS_LSTATE_NONOS);
	189	break;
	190
	191	case PDC_CHASSIS_DIRECT_PANIC:
	192	retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_PANIC, PDC_CHASSIS_LSTATE_RUN_CRASHREC);
	193	break;
	194
	195	case PDC_CHASSIS_DIRECT_LPMC:
	196	retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_LPMC, PDC_CHASSIS_LSTATE_RUN_SYSINT);
	197	break;
	198
	199	case PDC_CHASSIS_DIRECT_HPMC:
	200	retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_HPMC, PDC_CHASSIS_LSTATE_RUN_NCRIT);
	201	break;
	202
	203	default:
	204	retval = -1;
	205	}
	206	} else retval = -1;
	207	#else
8ffaeaf4	208	if (1) {
1da177e4 LT	209	switch (message) {
1da177e4 LT	210	case PDC_CHASSIS_DIRECT_BSTART:
8ffaeaf4 TV	211	retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_INIT));
	212	break;
	213
1da177e4 LT	214	case PDC_CHASSIS_DIRECT_BCOMPLETE:
	215	retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_RUN));
	216	break;
	217
	218	case PDC_CHASSIS_DIRECT_SHUTDOWN:
	219	retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_SHUT));
	220	break;
	221
	222	case PDC_CHASSIS_DIRECT_HPMC:
	223	case PDC_CHASSIS_DIRECT_PANIC:
	224	retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_FLT));
	225	break;
	226
	227	case PDC_CHASSIS_DIRECT_LPMC:
	228	retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_WARN));
	229	break;
	230
	231	default:
	232	retval = -1;
	233	}
	234	} else retval = -1;
	235	#endif /* CONFIG_64BIT */
	236	} /* if (pdc_chassis_enabled) */
	237	#endif /* CONFIG_PDC_CHASSIS */
	238	return retval;
	239	}
8ffaeaf4 TV	240
	241	#ifdef CONFIG_PDC_CHASSIS_WARN
	242	#ifdef CONFIG_PROC_FS
28ff1188	243	static int pdc_chassis_warn_show(struct seq_file m, void v)
8ffaeaf4	244	{
8ffaeaf4 TV	245	unsigned long warn;
	246	u32 warnreg;
	247
28ff1188	248	if (pdc_chassis_warn(&warn) != PDC_OK)
8ffaeaf4 TV	249	return -EIO;
	250
	251	warnreg = (warn & 0xFFFFFFFF);
	252
	253	if ((warnreg >> 24) & 0xFF)
28ff1188 DH	254	seq_printf(m, "Chassis component failure! (eg fan or PSU): 0x%.2x\n",
	255	(warnreg >> 24) & 0xFF);
	256
	257	seq_printf(m, "Battery: %s\n", (warnreg & 0x04) ? "Low!" : "OK");
	258	seq_printf(m, "Temp low: %s\n", (warnreg & 0x02) ? "Exceeded!" : "OK");
	259	seq_printf(m, "Temp mid: %s\n", (warnreg & 0x01) ? "Exceeded!" : "OK");
	260	return 0;
	261	}
	262
8ffaeaf4 TV	263	static int __init pdc_chassis_create_procfs(void)
8ffaeaf4 TV	264	{
9b0703fe TV	265	unsigned long test;
	266	int ret;
	267
	268	ret = pdc_chassis_warn(&test);
	269	if ((ret == PDC_BAD_PROC) \|\| (ret == PDC_BAD_OPTION)) {
	270	/* seems that some boxes (eg L1000) do not implement this */
	271	printk(KERN_INFO "Chassis warnings not supported.\n");
	272	return 0;
	273	}
	274
	275	printk(KERN_INFO "Enabling PDC chassis warnings support v%s\n",
	276	PDC_CHASSIS_VER);
3f3942ac	277	proc_create_single("chassis", 0400, NULL, pdc_chassis_warn_show);
8ffaeaf4 TV	278	return 0;
	279	}
	280
	281	__initcall(pdc_chassis_create_procfs);
	282
	283	#endif /* CONFIG_PROC_FS */
	284	#endif /* CONFIG_PDC_CHASSIS_WARN */