diff options
Diffstat (limited to 'arch/parisc/kernel/pdc_chassis.c')
| -rw-r--r-- | arch/parisc/kernel/pdc_chassis.c | 245 |
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 00000000000..52004ae28d2 --- /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; +} |