Merge to Fedora kernel-2.6.18-1.2224_FC5 patched with stable patch-2.6.18.1-vs2.0...

[linux-2.6.git] / arch / parisc / kernel / pdc_chassis.c

diff --git a/arch/parisc/kernel/pdc_chassis.c b/arch/parisc/kernel/pdc_chassis.c
index a45e2e2..d47ba1a 100644 (file)
--- a/arch/parisc/kernel/pdc_chassis.c
+++ b/arch/parisc/kernel/pdc_chassis.c
@@ -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 +16,10 @@
  *    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.
+ *         Find out how to get Chassis warnings out of PAT boxes?
  */
 
 #undef PDC_CHASSIS_DEBUG
@@ -30,15 +34,16 @@
 #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>
 #include <asm/pdc.h>
 #include <asm/pdcpat.h>
 
+#define PDC_CHASSIS_VER        "0.05"
 
 #ifdef CONFIG_PDC_CHASSIS
-static int pdc_chassis_old __read_mostly = 0;  
 static unsigned int pdc_chassis_enabled __read_mostly = 1;
 
 
@@ -64,7 +69,7 @@ __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 +78,6 @@ static void __init pdc_chassis_checkold(void)
                case 0x482:             /* E45 */
                case 0x483:             /* E55 */
                case 0x516:             /* A180 */
-                       pdc_chassis_old = 1;
                        break;
 
                default:
@@ -81,7 +85,7 @@ 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.
@@ -131,30 +135,20 @@ static struct notifier_block pdc_chassis_reboot_block = {
 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 */
-                       atomic_notifier_chain_register(&panic_notifier_list,
-                                       &pdc_chassis_panic_block);
-
-                       /* initialize reboot notifier chain */
-                       register_reboot_notifier(&pdc_chassis_reboot_block);
-               }
+               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 */
 }
@@ -215,9 +209,12 @@ 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 +241,61 @@ 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)
+{
+       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);
+       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 */