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278 lines
7.1 KiB
278 lines
7.1 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* interfaces to Chassis Codes via PDC (firmware) |
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* |
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* Copyright (C) 2002 Laurent Canet <[email protected]> |
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* Copyright (C) 2002-2006 Thibaut VARENE <[email protected]> |
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* |
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* TODO: poll chassis warns, trigger (configurable) machine shutdown when |
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* needed. |
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* Find out how to get Chassis warnings out of PAT boxes? |
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*/ |
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#undef PDC_CHASSIS_DEBUG |
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#ifdef PDC_CHASSIS_DEBUG |
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#define DPRINTK(fmt, args...) printk(fmt, ## args) |
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#else |
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#define DPRINTK(fmt, args...) |
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#endif |
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#include <linux/init.h> |
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/reboot.h> |
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#include <linux/notifier.h> |
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#include <linux/cache.h> |
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#include <linux/proc_fs.h> |
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#include <linux/seq_file.h> |
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#include <asm/pdc_chassis.h> |
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#include <asm/processor.h> |
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#include <asm/pdc.h> |
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#include <asm/pdcpat.h> |
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#define PDC_CHASSIS_VER "0.05" |
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#ifdef CONFIG_PDC_CHASSIS |
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static unsigned int pdc_chassis_enabled __read_mostly = 1; |
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/** |
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* pdc_chassis_setup() - Enable/disable pdc_chassis code at boot time. |
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* @str configuration param: 0 to disable chassis log |
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* @return 1 |
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*/ |
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static int __init pdc_chassis_setup(char *str) |
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{ |
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/*panic_timeout = simple_strtoul(str, NULL, 0);*/ |
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get_option(&str, &pdc_chassis_enabled); |
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return 1; |
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} |
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__setup("pdcchassis=", pdc_chassis_setup); |
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/** |
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* pdc_chassis_checkold() - Checks for old PDC_CHASSIS compatibility |
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* @pdc_chassis_old: 1 if old pdc chassis style |
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* |
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* Currently, only E class and A180 are known to work with this. |
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* Inspired by Christoph Plattner |
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*/ |
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#if 0 |
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static void __init pdc_chassis_checkold(void) |
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{ |
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switch(CPU_HVERSION) { |
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case 0x480: /* E25 */ |
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case 0x481: /* E35 */ |
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case 0x482: /* E45 */ |
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case 0x483: /* E55 */ |
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case 0x516: /* A180 */ |
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break; |
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default: |
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break; |
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} |
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DPRINTK(KERN_DEBUG "%s: pdc_chassis_checkold(); pdc_chassis_old = %d\n", __FILE__, pdc_chassis_old); |
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} |
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#endif |
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/** |
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* pdc_chassis_panic_event() - Called by the panic handler. |
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* |
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* As soon as a panic occurs, we should inform the PDC. |
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*/ |
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static int pdc_chassis_panic_event(struct notifier_block *this, |
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unsigned long event, void *ptr) |
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{ |
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pdc_chassis_send_status(PDC_CHASSIS_DIRECT_PANIC); |
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return NOTIFY_DONE; |
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} |
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static struct notifier_block pdc_chassis_panic_block = { |
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.notifier_call = pdc_chassis_panic_event, |
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.priority = INT_MAX, |
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}; |
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/** |
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* parisc_reboot_event() - Called by the reboot handler. |
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* |
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* As soon as a reboot occurs, we should inform the PDC. |
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*/ |
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static int pdc_chassis_reboot_event(struct notifier_block *this, |
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unsigned long event, void *ptr) |
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{ |
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pdc_chassis_send_status(PDC_CHASSIS_DIRECT_SHUTDOWN); |
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return NOTIFY_DONE; |
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} |
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static struct notifier_block pdc_chassis_reboot_block = { |
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.notifier_call = pdc_chassis_reboot_event, |
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.priority = INT_MAX, |
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}; |
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#endif /* CONFIG_PDC_CHASSIS */ |
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/** |
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* parisc_pdc_chassis_init() - Called at boot time. |
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*/ |
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void __init parisc_pdc_chassis_init(void) |
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{ |
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#ifdef CONFIG_PDC_CHASSIS |
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if (likely(pdc_chassis_enabled)) { |
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DPRINTK(KERN_DEBUG "%s: parisc_pdc_chassis_init()\n", __FILE__); |
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/* Let see if we have something to handle... */ |
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printk(KERN_INFO "Enabling %s chassis codes support v%s\n", |
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is_pdc_pat() ? "PDC_PAT" : "regular", |
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PDC_CHASSIS_VER); |
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/* initialize panic notifier chain */ |
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atomic_notifier_chain_register(&panic_notifier_list, |
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&pdc_chassis_panic_block); |
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/* initialize reboot notifier chain */ |
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register_reboot_notifier(&pdc_chassis_reboot_block); |
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} |
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#endif /* CONFIG_PDC_CHASSIS */ |
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} |
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/** |
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* pdc_chassis_send_status() - Sends a predefined message to the chassis, |
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* and changes the front panel LEDs according to the new system state |
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* @retval: PDC call return value. |
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* |
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* Only machines with 64 bits PDC PAT and those reported in |
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* pdc_chassis_checkold() are supported atm. |
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* |
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* returns 0 if no error, -1 if no supported PDC is present or invalid message, |
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* else returns the appropriate PDC error code. |
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* |
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* For a list of predefined messages, see asm-parisc/pdc_chassis.h |
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*/ |
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int pdc_chassis_send_status(int message) |
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{ |
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/* Maybe we should do that in an other way ? */ |
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int retval = 0; |
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#ifdef CONFIG_PDC_CHASSIS |
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if (likely(pdc_chassis_enabled)) { |
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DPRINTK(KERN_DEBUG "%s: pdc_chassis_send_status(%d)\n", __FILE__, message); |
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#ifdef CONFIG_64BIT |
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if (is_pdc_pat()) { |
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switch(message) { |
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case PDC_CHASSIS_DIRECT_BSTART: |
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retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_BSTART, PDC_CHASSIS_LSTATE_RUN_NORMAL); |
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break; |
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case PDC_CHASSIS_DIRECT_BCOMPLETE: |
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retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_BCOMPLETE, PDC_CHASSIS_LSTATE_RUN_NORMAL); |
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break; |
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case PDC_CHASSIS_DIRECT_SHUTDOWN: |
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retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_SHUTDOWN, PDC_CHASSIS_LSTATE_NONOS); |
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break; |
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case PDC_CHASSIS_DIRECT_PANIC: |
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retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_PANIC, PDC_CHASSIS_LSTATE_RUN_CRASHREC); |
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break; |
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case PDC_CHASSIS_DIRECT_LPMC: |
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retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_LPMC, PDC_CHASSIS_LSTATE_RUN_SYSINT); |
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break; |
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case PDC_CHASSIS_DIRECT_HPMC: |
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retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_HPMC, PDC_CHASSIS_LSTATE_RUN_NCRIT); |
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break; |
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default: |
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retval = -1; |
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} |
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} else retval = -1; |
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#else |
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if (1) { |
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switch (message) { |
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case PDC_CHASSIS_DIRECT_BSTART: |
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retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_INIT)); |
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break; |
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case PDC_CHASSIS_DIRECT_BCOMPLETE: |
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retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_RUN)); |
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break; |
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case PDC_CHASSIS_DIRECT_SHUTDOWN: |
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retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_SHUT)); |
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break; |
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case PDC_CHASSIS_DIRECT_HPMC: |
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case PDC_CHASSIS_DIRECT_PANIC: |
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retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_FLT)); |
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break; |
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case PDC_CHASSIS_DIRECT_LPMC: |
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retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_WARN)); |
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break; |
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default: |
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retval = -1; |
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} |
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} else retval = -1; |
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#endif /* CONFIG_64BIT */ |
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} /* if (pdc_chassis_enabled) */ |
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#endif /* CONFIG_PDC_CHASSIS */ |
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return retval; |
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} |
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#ifdef CONFIG_PDC_CHASSIS_WARN |
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#ifdef CONFIG_PROC_FS |
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static int pdc_chassis_warn_show(struct seq_file *m, void *v) |
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{ |
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unsigned long warn; |
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u32 warnreg; |
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if (pdc_chassis_warn(&warn) != PDC_OK) |
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return -EIO; |
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warnreg = (warn & 0xFFFFFFFF); |
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if ((warnreg >> 24) & 0xFF) |
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seq_printf(m, "Chassis component failure! (eg fan or PSU): 0x%.2x\n", |
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(warnreg >> 24) & 0xFF); |
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seq_printf(m, "Battery: %s\n", (warnreg & 0x04) ? "Low!" : "OK"); |
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seq_printf(m, "Temp low: %s\n", (warnreg & 0x02) ? "Exceeded!" : "OK"); |
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seq_printf(m, "Temp mid: %s\n", (warnreg & 0x01) ? "Exceeded!" : "OK"); |
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return 0; |
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} |
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static int __init pdc_chassis_create_procfs(void) |
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{ |
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unsigned long test; |
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int ret; |
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ret = pdc_chassis_warn(&test); |
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if ((ret == PDC_BAD_PROC) || (ret == PDC_BAD_OPTION)) { |
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/* seems that some boxes (eg L1000) do not implement this */ |
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printk(KERN_INFO "Chassis warnings not supported.\n"); |
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return 0; |
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} |
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printk(KERN_INFO "Enabling PDC chassis warnings support v%s\n", |
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PDC_CHASSIS_VER); |
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proc_create_single("chassis", 0400, NULL, pdc_chassis_warn_show); |
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return 0; |
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} |
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__initcall(pdc_chassis_create_procfs); |
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#endif /* CONFIG_PROC_FS */ |
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#endif /* CONFIG_PDC_CHASSIS_WARN */
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