/* * interfaces to Chassis Codes via PDC (firmware) * * Copyright (C) 2002 Laurent Canet * Copyright (C) 2002-2006 Thibaut VARENE * * 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 #include #include #include #include #include #include #include #include #include #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 */