2 * interfaces to log Chassis Codes via PDC (firmware)
4 * Copyright (C) 2002 Laurent Canet <canetl@esiee.fr>
5 * Copyright (C) 2002-2004 Thibaut VARENE <varenet@parisc-linux.org>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License, version 2, as
9 * published by the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #undef PDC_CHASSIS_DEBUG
22 #ifdef PDC_CHASSIS_DEBUG
23 #define DPRINTK(fmt, args...) printk(fmt, ## args)
25 #define DPRINTK(fmt, args...)
28 #include <linux/init.h>
29 #include <linux/kernel.h>
30 #include <linux/reboot.h>
31 #include <linux/notifier.h>
32 #include <linux/cache.h>
34 #include <asm/pdc_chassis.h>
35 #include <asm/processor.h>
37 #include <asm/pdcpat.h>
40 #ifdef CONFIG_PDC_CHASSIS
41 static int pdc_chassis_old __read_mostly = 0;
42 static unsigned int pdc_chassis_enabled __read_mostly = 1;
46 * pdc_chassis_setup() - Enable/disable pdc_chassis code at boot time.
47 * @str configuration param: 0 to disable chassis log
51 static int __init pdc_chassis_setup(char *str)
53 /*panic_timeout = simple_strtoul(str, NULL, 0);*/
54 get_option(&str, &pdc_chassis_enabled);
57 __setup("pdcchassis=", pdc_chassis_setup);
61 * pdc_chassis_checkold() - Checks for old PDC_CHASSIS compatibility
62 * @pdc_chassis_old: 1 if old pdc chassis style
64 * Currently, only E class and A180 are known to work with this.
65 * Inspired by Christoph Plattner
68 static void __init pdc_chassis_checkold(void)
70 switch(CPU_HVERSION) {
75 case 0x516: /* A180 */
82 DPRINTK(KERN_DEBUG "%s: pdc_chassis_checkold(); pdc_chassis_old = %d\n", __FILE__, pdc_chassis_old);
87 * pdc_chassis_panic_event() - Called by the panic handler.
89 * As soon as a panic occurs, we should inform the PDC.
92 static int pdc_chassis_panic_event(struct notifier_block *this,
93 unsigned long event, void *ptr)
95 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_PANIC);
100 static struct notifier_block pdc_chassis_panic_block = {
101 .notifier_call = pdc_chassis_panic_event,
107 * parisc_reboot_event() - Called by the reboot handler.
109 * As soon as a reboot occurs, we should inform the PDC.
112 static int pdc_chassis_reboot_event(struct notifier_block *this,
113 unsigned long event, void *ptr)
115 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_SHUTDOWN);
120 static struct notifier_block pdc_chassis_reboot_block = {
121 .notifier_call = pdc_chassis_reboot_event,
124 #endif /* CONFIG_PDC_CHASSIS */
128 * parisc_pdc_chassis_init() - Called at boot time.
131 void __init parisc_pdc_chassis_init(void)
133 #ifdef CONFIG_PDC_CHASSIS
135 if (likely(pdc_chassis_enabled)) {
136 DPRINTK(KERN_DEBUG "%s: parisc_pdc_chassis_init()\n", __FILE__);
138 /* Let see if we have something to handle... */
139 /* Check for PDC_PAT or old LED Panel */
140 pdc_chassis_checkold();
142 printk(KERN_INFO "Enabling PDC_PAT chassis codes support.\n");
145 else if (unlikely(pdc_chassis_old)) {
146 printk(KERN_INFO "Enabling old style chassis LED panel support.\n");
151 /* initialize panic notifier chain */
152 atomic_notifier_chain_register(&panic_notifier_list,
153 &pdc_chassis_panic_block);
155 /* initialize reboot notifier chain */
156 register_reboot_notifier(&pdc_chassis_reboot_block);
159 #endif /* CONFIG_PDC_CHASSIS */
164 * pdc_chassis_send_status() - Sends a predefined message to the chassis,
165 * and changes the front panel LEDs according to the new system state
166 * @retval: PDC call return value.
168 * Only machines with 64 bits PDC PAT and those reported in
169 * pdc_chassis_checkold() are supported atm.
171 * returns 0 if no error, -1 if no supported PDC is present or invalid message,
172 * else returns the appropriate PDC error code.
174 * For a list of predefined messages, see asm-parisc/pdc_chassis.h
177 int pdc_chassis_send_status(int message)
179 /* Maybe we should do that in an other way ? */
181 #ifdef CONFIG_PDC_CHASSIS
182 if (likely(pdc_chassis_enabled)) {
184 DPRINTK(KERN_DEBUG "%s: pdc_chassis_send_status(%d)\n", __FILE__, message);
189 case PDC_CHASSIS_DIRECT_BSTART:
190 retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_BSTART, PDC_CHASSIS_LSTATE_RUN_NORMAL);
193 case PDC_CHASSIS_DIRECT_BCOMPLETE:
194 retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_BCOMPLETE, PDC_CHASSIS_LSTATE_RUN_NORMAL);
197 case PDC_CHASSIS_DIRECT_SHUTDOWN:
198 retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_SHUTDOWN, PDC_CHASSIS_LSTATE_NONOS);
201 case PDC_CHASSIS_DIRECT_PANIC:
202 retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_PANIC, PDC_CHASSIS_LSTATE_RUN_CRASHREC);
205 case PDC_CHASSIS_DIRECT_LPMC:
206 retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_LPMC, PDC_CHASSIS_LSTATE_RUN_SYSINT);
209 case PDC_CHASSIS_DIRECT_HPMC:
210 retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_HPMC, PDC_CHASSIS_LSTATE_RUN_NCRIT);
218 if (unlikely(pdc_chassis_old)) {
220 case PDC_CHASSIS_DIRECT_BSTART:
221 case PDC_CHASSIS_DIRECT_BCOMPLETE:
222 retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_RUN));
225 case PDC_CHASSIS_DIRECT_SHUTDOWN:
226 retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_SHUT));
229 case PDC_CHASSIS_DIRECT_HPMC:
230 case PDC_CHASSIS_DIRECT_PANIC:
231 retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_FLT));
234 case PDC_CHASSIS_DIRECT_LPMC:
235 retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_WARN));
242 #endif /* CONFIG_64BIT */
243 } /* if (pdc_chassis_enabled) */
244 #endif /* CONFIG_PDC_CHASSIS */