247 lines
6.6 KiB
C
247 lines
6.6 KiB
C
/*
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* interfaces to log Chassis Codes via PDC (firmware)
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*
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* Copyright (C) 2002 Laurent Canet <canetl@esiee.fr>
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* Copyright (C) 2002-2004 Thibaut VARENE <varenet@parisc-linux.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#undef PDC_CHASSIS_DEBUG
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#ifdef PDC_CHASSIS_DEBUG
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#define DPRINTK(fmt, args...) printk(fmt, ## args)
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#else
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#define DPRINTK(fmt, args...)
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#endif
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/reboot.h>
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#include <linux/notifier.h>
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#include <linux/cache.h>
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#include <asm/pdc_chassis.h>
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#include <asm/processor.h>
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#include <asm/pdc.h>
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#include <asm/pdcpat.h>
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#ifdef CONFIG_PDC_CHASSIS
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static int pdc_chassis_old __read_mostly = 0;
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static unsigned int pdc_chassis_enabled __read_mostly = 1;
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/**
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* pdc_chassis_setup() - Enable/disable pdc_chassis code at boot time.
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* @str configuration param: 0 to disable chassis log
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* @return 1
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*/
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static int __init pdc_chassis_setup(char *str)
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{
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/*panic_timeout = simple_strtoul(str, NULL, 0);*/
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get_option(&str, &pdc_chassis_enabled);
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return 1;
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}
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__setup("pdcchassis=", pdc_chassis_setup);
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/**
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* pdc_chassis_checkold() - Checks for old PDC_CHASSIS compatibility
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* @pdc_chassis_old: 1 if old pdc chassis style
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*
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* Currently, only E class and A180 are known to work with this.
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* Inspired by Christoph Plattner
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*/
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static void __init pdc_chassis_checkold(void)
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{
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switch(CPU_HVERSION) {
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case 0x480: /* E25 */
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case 0x481: /* E35 */
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case 0x482: /* E45 */
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case 0x483: /* E55 */
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case 0x516: /* A180 */
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pdc_chassis_old = 1;
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break;
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default:
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break;
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}
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DPRINTK(KERN_DEBUG "%s: pdc_chassis_checkold(); pdc_chassis_old = %d\n", __FILE__, pdc_chassis_old);
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}
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/**
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* pdc_chassis_panic_event() - Called by the panic handler.
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*
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* As soon as a panic occurs, we should inform the PDC.
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*/
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static int pdc_chassis_panic_event(struct notifier_block *this,
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unsigned long event, void *ptr)
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{
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pdc_chassis_send_status(PDC_CHASSIS_DIRECT_PANIC);
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return NOTIFY_DONE;
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}
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static struct notifier_block pdc_chassis_panic_block = {
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.notifier_call = pdc_chassis_panic_event,
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.priority = INT_MAX,
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};
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/**
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* parisc_reboot_event() - Called by the reboot handler.
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*
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* As soon as a reboot occurs, we should inform the PDC.
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*/
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static int pdc_chassis_reboot_event(struct notifier_block *this,
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unsigned long event, void *ptr)
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{
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pdc_chassis_send_status(PDC_CHASSIS_DIRECT_SHUTDOWN);
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return NOTIFY_DONE;
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}
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static struct notifier_block pdc_chassis_reboot_block = {
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.notifier_call = pdc_chassis_reboot_event,
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.priority = INT_MAX,
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};
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#endif /* CONFIG_PDC_CHASSIS */
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/**
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* parisc_pdc_chassis_init() - Called at boot time.
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*/
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void __init parisc_pdc_chassis_init(void)
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{
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#ifdef CONFIG_PDC_CHASSIS
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int handle = 0;
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if (likely(pdc_chassis_enabled)) {
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DPRINTK(KERN_DEBUG "%s: parisc_pdc_chassis_init()\n", __FILE__);
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/* Let see if we have something to handle... */
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/* Check for PDC_PAT or old LED Panel */
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pdc_chassis_checkold();
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if (is_pdc_pat()) {
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printk(KERN_INFO "Enabling PDC_PAT chassis codes support.\n");
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handle = 1;
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}
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else if (unlikely(pdc_chassis_old)) {
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printk(KERN_INFO "Enabling old style chassis LED panel support.\n");
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handle = 1;
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}
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if (handle) {
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/* initialize panic notifier chain */
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notifier_chain_register(&panic_notifier_list, &pdc_chassis_panic_block);
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/* initialize reboot notifier chain */
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register_reboot_notifier(&pdc_chassis_reboot_block);
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}
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}
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#endif /* CONFIG_PDC_CHASSIS */
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}
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/**
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* pdc_chassis_send_status() - Sends a predefined message to the chassis,
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* and changes the front panel LEDs according to the new system state
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* @retval: PDC call return value.
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*
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* Only machines with 64 bits PDC PAT and those reported in
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* pdc_chassis_checkold() are supported atm.
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*
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* returns 0 if no error, -1 if no supported PDC is present or invalid message,
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* else returns the appropriate PDC error code.
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*
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* For a list of predefined messages, see asm-parisc/pdc_chassis.h
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*/
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int pdc_chassis_send_status(int message)
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{
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/* Maybe we should do that in an other way ? */
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int retval = 0;
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#ifdef CONFIG_PDC_CHASSIS
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if (likely(pdc_chassis_enabled)) {
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DPRINTK(KERN_DEBUG "%s: pdc_chassis_send_status(%d)\n", __FILE__, message);
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#ifdef CONFIG_64BIT
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if (is_pdc_pat()) {
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switch(message) {
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case PDC_CHASSIS_DIRECT_BSTART:
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retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_BSTART, PDC_CHASSIS_LSTATE_RUN_NORMAL);
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break;
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case PDC_CHASSIS_DIRECT_BCOMPLETE:
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retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_BCOMPLETE, PDC_CHASSIS_LSTATE_RUN_NORMAL);
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break;
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case PDC_CHASSIS_DIRECT_SHUTDOWN:
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retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_SHUTDOWN, PDC_CHASSIS_LSTATE_NONOS);
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break;
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case PDC_CHASSIS_DIRECT_PANIC:
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retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_PANIC, PDC_CHASSIS_LSTATE_RUN_CRASHREC);
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break;
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case PDC_CHASSIS_DIRECT_LPMC:
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retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_LPMC, PDC_CHASSIS_LSTATE_RUN_SYSINT);
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break;
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case PDC_CHASSIS_DIRECT_HPMC:
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retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_HPMC, PDC_CHASSIS_LSTATE_RUN_NCRIT);
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break;
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default:
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retval = -1;
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}
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} else retval = -1;
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#else
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if (unlikely(pdc_chassis_old)) {
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switch (message) {
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case PDC_CHASSIS_DIRECT_BSTART:
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case PDC_CHASSIS_DIRECT_BCOMPLETE:
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retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_RUN));
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break;
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case PDC_CHASSIS_DIRECT_SHUTDOWN:
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retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_SHUT));
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break;
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case PDC_CHASSIS_DIRECT_HPMC:
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case PDC_CHASSIS_DIRECT_PANIC:
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retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_FLT));
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break;
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case PDC_CHASSIS_DIRECT_LPMC:
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retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_WARN));
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break;
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default:
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retval = -1;
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}
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} else retval = -1;
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#endif /* CONFIG_64BIT */
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} /* if (pdc_chassis_enabled) */
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#endif /* CONFIG_PDC_CHASSIS */
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return retval;
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}
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