/*
* interfaces to log Chassis Codes via PDC (firmware)
*
* Copyright (C) 2002 Laurent Canet <canetl@esiee.fr>
* Copyright (C) 2002-2004 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 as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* 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
*/
#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/kernel.h>
#include <linux/reboot.h>
#include <linux/notifier.h>
#include <linux/cache.h>
#include <asm/pdc_chassis.h>
#include <asm/processor.h>
#include <asm/pdc.h>
#include <asm/pdcpat.h>
#ifdef CONFIG_PDC_CHASSIS
static int pdc_chassis_old __read_mostly = 0;
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
* @pdc_chassis_old: 1 if old pdc chassis style
*
* Currently, only E class and A180 are known to work with this.
* Inspired by Christoph Plattner
*/
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 */
pdc_chassis_old = 1;
break;
default:
break;
}
DPRINTK(KERN_DEBUG "%s: pdc_chassis_checkold(); pdc_chassis_old = %d\n", __FILE__, pdc_chassis_old);
}
/**
* pdc_chassis_panic_event() - Called by the panic handler.
*
* 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,
};
/**
* parisc_reboot_event() - Called by the reboot handler.
*
* 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
int handle = 0;
if (likely(pdc_chassis_enabled)) {
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();
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");
handle = 1;
}
if (handle) {
/* initialize panic notifier chain */
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
* @retval: PDC call return value.
*
* 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 (unlikely(pdc_chassis_old)) {
switch (message) {
case PDC_CHASSIS_DIRECT_BSTART:
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;
}
