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[PARISC] PDC_CHASSIS is implemented on all machines

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This patch removes a limitation of the original code, so that CHASSIS
codes can be sent to all machines. On machines with a LCD panel, this
code displays "INI" during bootup, "RUN" when the system is booted and
running, "FLT" when a panic occurs, etc.

This part of the code can be enabled/disabled through CONFIG_PDC_CHASSIS

This patch also adds minimalistic support for Chassis warnings, through
a proc entry '/proc/chassis', which will reflect the warnings status (PSU
or fans failure when they happen, NVRAM battery level and temperature
thresholds overflows).

This part of the code can be enabled/disabled through CONFIG_PDC_CHASSIS_WARN

Signed-off-by: Thibaut VARENE <varenet@parisc-linux.org>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
This commit is contained in:
Thibaut Varene
2006-05-03 17:27:35 -06:00
committed by Kyle McMartin
parent c95f2e5f2f
commit 8ffaeaf42e
4 changed files with 107 additions and 22 deletions
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73
arch/parisc/kernel/pdc_chassis.c
View File

@@ -1,8 +1,8 @@
/*
* interfaces to log Chassis Codes via PDC (firmware)
* interfaces to Chassis Codes via PDC (firmware)
*
* Copyright (C) 2002 Laurent Canet <canetl@esiee.fr>
* Copyright (C) 2002-2004 Thibaut VARENE <varenet@parisc-linux.org>
* Copyright (C) 2002-2006 Thibaut VARENE <varenet@parisc-linux.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2, as
@@ -16,6 +16,9 @@
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* TODO: poll chassis warns, trigger (configurable) machine shutdown when
* needed.
*/
#undef PDC_CHASSIS_DEBUG
@@ -30,6 +33,7 @@
#include <linux/reboot.h>
#include <linux/notifier.h>
#include <linux/cache.h>
#include <linux/proc_fs.h>
#include <asm/pdc_chassis.h>
#include <asm/processor.h>
@@ -38,7 +42,6 @@
#ifdef CONFIG_PDC_CHASSIS
static int pdc_chassis_old __read_mostly = 0;
static unsigned int pdc_chassis_enabled __read_mostly = 1;
@@ -64,7 +67,7 @@ __setup("pdcchassis=", pdc_chassis_setup);
* 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) {
@@ -73,7 +76,6 @@ static void __init pdc_chassis_checkold(void)
case 0x482: /* E45 */
case 0x483: /* E55 */
case 0x516: /* A180 */
pdc_chassis_old = 1;
break;
default:
@@ -81,7 +83,7 @@ static void __init pdc_chassis_checkold(void)
}
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.
@@ -136,14 +138,13 @@ void __init parisc_pdc_chassis_init(void)
DPRINTK(KERN_DEBUG "%s: parisc_pdc_chassis_init()\n", __FILE__);
/* Let see if we have something to handle... */
/* Check for PDC_PAT or old LED Panel */
pdc_chassis_checkold();
/* Check for PDC_PAT */
if (is_pdc_pat()) {
printk(KERN_INFO "Enabling PDC_PAT chassis codes support.\n");
handle = 1;
}
else if (unlikely(pdc_chassis_old)) {
printk(KERN_INFO "Enabling old style chassis LED panel support.\n");
else {
printk(KERN_INFO "Enabling regular chassis codes support.\n");
handle = 1;
}
@@ -215,9 +216,12 @@ int pdc_chassis_send_status(int message)
}
} else retval = -1;
#else
if (unlikely(pdc_chassis_old)) {
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;
@@ -244,3 +248,50 @@ int pdc_chassis_send_status(int message)
#endif /* CONFIG_PDC_CHASSIS */
return retval;
}
#ifdef CONFIG_PDC_CHASSIS_WARN
#ifdef CONFIG_PROC_FS
static int pdc_chassis_warn_pread(char *page, char **start, off_t off,
int count, int *eof, void *data)
{
char *out = page;
int len, ret;
unsigned long warn;
u32 warnreg;
ret = pdc_chassis_warn(&warn);
if (ret != PDC_OK)
return -EIO;
warnreg = (warn & 0xFFFFFFFF);
if ((warnreg >> 24) & 0xFF)
out += sprintf(out, "Chassis component failure! (eg fan or PSU): 0x%.2x\n", ((warnreg >> 24) & 0xFF));
out += sprintf(out, "Battery: %s\n", (warnreg & 0x04) ? "Low!" : "OK");
out += sprintf(out, "Temp low: %s\n", (warnreg & 0x02) ? "Exceeded!" : "OK");
out += sprintf(out, "Temp mid: %s\n", (warnreg & 0x01) ? "Exceeded!" : "OK");
len = out - page - off;
if (len < count) {
*eof = 1;
if (len <= 0) return 0;
} else {
len = count;
}
*start = page + off;
return len;
}
static int __init pdc_chassis_create_procfs(void)
{
printk(KERN_INFO "Enabling PDC chassis warnings support.\n");
create_proc_read_entry("chassis", 0400, NULL, pdc_chassis_warn_pread,
NULL);
return 0;
}
__initcall(pdc_chassis_create_procfs);
#endif /* CONFIG_PROC_FS */
#endif /* CONFIG_PDC_CHASSIS_WARN */