1 files changed, 245 insertions, 0 deletions

diff --git a/arch/parisc/kernel/pdc_chassis.c b/arch/parisc/kernel/pdc_chassis.c
new file mode 100644
index 000000000000..52004ae28d20
--- /dev/null
+++ b/arch/parisc/kernel/pdc_chassis.c
@@ -0,0 +1,245 @@
+/* 
+ *    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 <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 = 0; 
+static unsigned int pdc_chassis_enabled = 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 (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 (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 (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 (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;
+}