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-rw-r--r--arch/parisc/kernel/pdc_chassis.c301
1 files changed, 301 insertions, 0 deletions
diff --git a/arch/parisc/kernel/pdc_chassis.c b/arch/parisc/kernel/pdc_chassis.c
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index 00000000000..d47ba1aa825
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+++ b/arch/parisc/kernel/pdc_chassis.c
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+/*
+ * interfaces to Chassis Codes via PDC (firmware)
+ *
+ * Copyright (C) 2002 Laurent Canet <canetl@esiee.fr>
+ * 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
+ * published by the Free Software Foundation.
+ *
+ * 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
+ *
+ * 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
+#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 <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 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
+ */
+#if 0
+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 */
+ break;
+
+ default:
+ break;
+ }
+ 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.
+ *
+ * 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
+ if (likely(pdc_chassis_enabled)) {
+ DPRINTK(KERN_DEBUG "%s: parisc_pdc_chassis_init()\n", __FILE__);
+
+ /* Let see if we have something to handle... */
+ 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 */
+}
+
+
+/**
+ * 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 (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;
+
+ 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;
+}
+
+#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 */