Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
8ffaeaf4 | 2 | * interfaces to Chassis Codes via PDC (firmware) |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 2002 Laurent Canet <canetl@esiee.fr> | |
8ffaeaf4 | 5 | * Copyright (C) 2002-2006 Thibaut VARENE <varenet@parisc-linux.org> |
1da177e4 LT |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
a81dd18e TV |
8 | * it under the terms of the GNU General Public License, version 2, as |
9 | * published by the Free Software Foundation. | |
1da177e4 LT |
10 | * |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
8ffaeaf4 TV |
19 | * |
20 | * TODO: poll chassis warns, trigger (configurable) machine shutdown when | |
21 | * needed. | |
9b0703fe | 22 | * Find out how to get Chassis warnings out of PAT boxes? |
1da177e4 LT |
23 | */ |
24 | ||
25 | #undef PDC_CHASSIS_DEBUG | |
26 | #ifdef PDC_CHASSIS_DEBUG | |
27 | #define DPRINTK(fmt, args...) printk(fmt, ## args) | |
28 | #else | |
29 | #define DPRINTK(fmt, args...) | |
30 | #endif | |
31 | ||
32 | #include <linux/init.h> | |
28ff1188 | 33 | #include <linux/module.h> |
1da177e4 LT |
34 | #include <linux/kernel.h> |
35 | #include <linux/reboot.h> | |
36 | #include <linux/notifier.h> | |
8039de10 | 37 | #include <linux/cache.h> |
8ffaeaf4 | 38 | #include <linux/proc_fs.h> |
28ff1188 | 39 | #include <linux/seq_file.h> |
1da177e4 LT |
40 | |
41 | #include <asm/pdc_chassis.h> | |
42 | #include <asm/processor.h> | |
43 | #include <asm/pdc.h> | |
44 | #include <asm/pdcpat.h> | |
45 | ||
9b0703fe | 46 | #define PDC_CHASSIS_VER "0.05" |
1da177e4 LT |
47 | |
48 | #ifdef CONFIG_PDC_CHASSIS | |
8039de10 | 49 | static unsigned int pdc_chassis_enabled __read_mostly = 1; |
1da177e4 LT |
50 | |
51 | ||
52 | /** | |
53 | * pdc_chassis_setup() - Enable/disable pdc_chassis code at boot time. | |
54 | * @str configuration param: 0 to disable chassis log | |
55 | * @return 1 | |
56 | */ | |
57 | ||
58 | static int __init pdc_chassis_setup(char *str) | |
59 | { | |
60 | /*panic_timeout = simple_strtoul(str, NULL, 0);*/ | |
61 | get_option(&str, &pdc_chassis_enabled); | |
62 | return 1; | |
63 | } | |
64 | __setup("pdcchassis=", pdc_chassis_setup); | |
65 | ||
66 | ||
67 | /** | |
68 | * pdc_chassis_checkold() - Checks for old PDC_CHASSIS compatibility | |
69 | * @pdc_chassis_old: 1 if old pdc chassis style | |
70 | * | |
71 | * Currently, only E class and A180 are known to work with this. | |
72 | * Inspired by Christoph Plattner | |
73 | */ | |
8ffaeaf4 | 74 | #if 0 |
1da177e4 LT |
75 | static void __init pdc_chassis_checkold(void) |
76 | { | |
77 | switch(CPU_HVERSION) { | |
78 | case 0x480: /* E25 */ | |
79 | case 0x481: /* E35 */ | |
80 | case 0x482: /* E45 */ | |
81 | case 0x483: /* E55 */ | |
82 | case 0x516: /* A180 */ | |
1da177e4 LT |
83 | break; |
84 | ||
85 | default: | |
86 | break; | |
87 | } | |
88 | DPRINTK(KERN_DEBUG "%s: pdc_chassis_checkold(); pdc_chassis_old = %d\n", __FILE__, pdc_chassis_old); | |
89 | } | |
8ffaeaf4 | 90 | #endif |
1da177e4 LT |
91 | |
92 | /** | |
93 | * pdc_chassis_panic_event() - Called by the panic handler. | |
94 | * | |
95 | * As soon as a panic occurs, we should inform the PDC. | |
96 | */ | |
97 | ||
98 | static int pdc_chassis_panic_event(struct notifier_block *this, | |
99 | unsigned long event, void *ptr) | |
100 | { | |
101 | pdc_chassis_send_status(PDC_CHASSIS_DIRECT_PANIC); | |
102 | return NOTIFY_DONE; | |
103 | } | |
104 | ||
105 | ||
106 | static struct notifier_block pdc_chassis_panic_block = { | |
107 | .notifier_call = pdc_chassis_panic_event, | |
108 | .priority = INT_MAX, | |
109 | }; | |
110 | ||
111 | ||
112 | /** | |
113 | * parisc_reboot_event() - Called by the reboot handler. | |
114 | * | |
115 | * As soon as a reboot occurs, we should inform the PDC. | |
116 | */ | |
117 | ||
118 | static int pdc_chassis_reboot_event(struct notifier_block *this, | |
119 | unsigned long event, void *ptr) | |
120 | { | |
121 | pdc_chassis_send_status(PDC_CHASSIS_DIRECT_SHUTDOWN); | |
122 | return NOTIFY_DONE; | |
123 | } | |
124 | ||
125 | ||
126 | static struct notifier_block pdc_chassis_reboot_block = { | |
127 | .notifier_call = pdc_chassis_reboot_event, | |
128 | .priority = INT_MAX, | |
129 | }; | |
130 | #endif /* CONFIG_PDC_CHASSIS */ | |
131 | ||
132 | ||
133 | /** | |
134 | * parisc_pdc_chassis_init() - Called at boot time. | |
135 | */ | |
136 | ||
137 | void __init parisc_pdc_chassis_init(void) | |
138 | { | |
139 | #ifdef CONFIG_PDC_CHASSIS | |
8039de10 | 140 | if (likely(pdc_chassis_enabled)) { |
1da177e4 LT |
141 | DPRINTK(KERN_DEBUG "%s: parisc_pdc_chassis_init()\n", __FILE__); |
142 | ||
143 | /* Let see if we have something to handle... */ | |
9b0703fe TV |
144 | printk(KERN_INFO "Enabling %s chassis codes support v%s\n", |
145 | is_pdc_pat() ? "PDC_PAT" : "regular", | |
146 | PDC_CHASSIS_VER); | |
147 | ||
148 | /* initialize panic notifier chain */ | |
149 | atomic_notifier_chain_register(&panic_notifier_list, | |
150 | &pdc_chassis_panic_block); | |
151 | ||
152 | /* initialize reboot notifier chain */ | |
153 | register_reboot_notifier(&pdc_chassis_reboot_block); | |
1da177e4 LT |
154 | } |
155 | #endif /* CONFIG_PDC_CHASSIS */ | |
156 | } | |
157 | ||
158 | ||
159 | /** | |
160 | * pdc_chassis_send_status() - Sends a predefined message to the chassis, | |
161 | * and changes the front panel LEDs according to the new system state | |
162 | * @retval: PDC call return value. | |
163 | * | |
164 | * Only machines with 64 bits PDC PAT and those reported in | |
165 | * pdc_chassis_checkold() are supported atm. | |
166 | * | |
167 | * returns 0 if no error, -1 if no supported PDC is present or invalid message, | |
168 | * else returns the appropriate PDC error code. | |
169 | * | |
170 | * For a list of predefined messages, see asm-parisc/pdc_chassis.h | |
171 | */ | |
172 | ||
173 | int pdc_chassis_send_status(int message) | |
174 | { | |
175 | /* Maybe we should do that in an other way ? */ | |
176 | int retval = 0; | |
177 | #ifdef CONFIG_PDC_CHASSIS | |
8039de10 | 178 | if (likely(pdc_chassis_enabled)) { |
1da177e4 LT |
179 | |
180 | DPRINTK(KERN_DEBUG "%s: pdc_chassis_send_status(%d)\n", __FILE__, message); | |
181 | ||
182 | #ifdef CONFIG_64BIT | |
183 | if (is_pdc_pat()) { | |
184 | switch(message) { | |
185 | case PDC_CHASSIS_DIRECT_BSTART: | |
186 | retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_BSTART, PDC_CHASSIS_LSTATE_RUN_NORMAL); | |
187 | break; | |
188 | ||
189 | case PDC_CHASSIS_DIRECT_BCOMPLETE: | |
190 | retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_BCOMPLETE, PDC_CHASSIS_LSTATE_RUN_NORMAL); | |
191 | break; | |
192 | ||
193 | case PDC_CHASSIS_DIRECT_SHUTDOWN: | |
194 | retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_SHUTDOWN, PDC_CHASSIS_LSTATE_NONOS); | |
195 | break; | |
196 | ||
197 | case PDC_CHASSIS_DIRECT_PANIC: | |
198 | retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_PANIC, PDC_CHASSIS_LSTATE_RUN_CRASHREC); | |
199 | break; | |
200 | ||
201 | case PDC_CHASSIS_DIRECT_LPMC: | |
202 | retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_LPMC, PDC_CHASSIS_LSTATE_RUN_SYSINT); | |
203 | break; | |
204 | ||
205 | case PDC_CHASSIS_DIRECT_HPMC: | |
206 | retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_HPMC, PDC_CHASSIS_LSTATE_RUN_NCRIT); | |
207 | break; | |
208 | ||
209 | default: | |
210 | retval = -1; | |
211 | } | |
212 | } else retval = -1; | |
213 | #else | |
8ffaeaf4 | 214 | if (1) { |
1da177e4 LT |
215 | switch (message) { |
216 | case PDC_CHASSIS_DIRECT_BSTART: | |
8ffaeaf4 TV |
217 | retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_INIT)); |
218 | break; | |
219 | ||
1da177e4 LT |
220 | case PDC_CHASSIS_DIRECT_BCOMPLETE: |
221 | retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_RUN)); | |
222 | break; | |
223 | ||
224 | case PDC_CHASSIS_DIRECT_SHUTDOWN: | |
225 | retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_SHUT)); | |
226 | break; | |
227 | ||
228 | case PDC_CHASSIS_DIRECT_HPMC: | |
229 | case PDC_CHASSIS_DIRECT_PANIC: | |
230 | retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_FLT)); | |
231 | break; | |
232 | ||
233 | case PDC_CHASSIS_DIRECT_LPMC: | |
234 | retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_WARN)); | |
235 | break; | |
236 | ||
237 | default: | |
238 | retval = -1; | |
239 | } | |
240 | } else retval = -1; | |
241 | #endif /* CONFIG_64BIT */ | |
242 | } /* if (pdc_chassis_enabled) */ | |
243 | #endif /* CONFIG_PDC_CHASSIS */ | |
244 | return retval; | |
245 | } | |
8ffaeaf4 TV |
246 | |
247 | #ifdef CONFIG_PDC_CHASSIS_WARN | |
248 | #ifdef CONFIG_PROC_FS | |
28ff1188 | 249 | static int pdc_chassis_warn_show(struct seq_file *m, void *v) |
8ffaeaf4 | 250 | { |
8ffaeaf4 TV |
251 | unsigned long warn; |
252 | u32 warnreg; | |
253 | ||
28ff1188 | 254 | if (pdc_chassis_warn(&warn) != PDC_OK) |
8ffaeaf4 TV |
255 | return -EIO; |
256 | ||
257 | warnreg = (warn & 0xFFFFFFFF); | |
258 | ||
259 | if ((warnreg >> 24) & 0xFF) | |
28ff1188 DH |
260 | seq_printf(m, "Chassis component failure! (eg fan or PSU): 0x%.2x\n", |
261 | (warnreg >> 24) & 0xFF); | |
262 | ||
263 | seq_printf(m, "Battery: %s\n", (warnreg & 0x04) ? "Low!" : "OK"); | |
264 | seq_printf(m, "Temp low: %s\n", (warnreg & 0x02) ? "Exceeded!" : "OK"); | |
265 | seq_printf(m, "Temp mid: %s\n", (warnreg & 0x01) ? "Exceeded!" : "OK"); | |
266 | return 0; | |
267 | } | |
268 | ||
269 | static int pdc_chassis_warn_open(struct inode *inode, struct file *file) | |
270 | { | |
271 | return single_open(file, pdc_chassis_warn_show, NULL); | |
8ffaeaf4 TV |
272 | } |
273 | ||
28ff1188 DH |
274 | static const struct file_operations pdc_chassis_warn_fops = { |
275 | .open = pdc_chassis_warn_open, | |
276 | .read = seq_read, | |
277 | .llseek = seq_lseek, | |
46d4c0ff | 278 | .release = single_release, |
28ff1188 DH |
279 | }; |
280 | ||
8ffaeaf4 TV |
281 | static int __init pdc_chassis_create_procfs(void) |
282 | { | |
9b0703fe TV |
283 | unsigned long test; |
284 | int ret; | |
285 | ||
286 | ret = pdc_chassis_warn(&test); | |
287 | if ((ret == PDC_BAD_PROC) || (ret == PDC_BAD_OPTION)) { | |
288 | /* seems that some boxes (eg L1000) do not implement this */ | |
289 | printk(KERN_INFO "Chassis warnings not supported.\n"); | |
290 | return 0; | |
291 | } | |
292 | ||
293 | printk(KERN_INFO "Enabling PDC chassis warnings support v%s\n", | |
294 | PDC_CHASSIS_VER); | |
28ff1188 | 295 | proc_create("chassis", 0400, NULL, &pdc_chassis_warn_fops); |
8ffaeaf4 TV |
296 | return 0; |
297 | } | |
298 | ||
299 | __initcall(pdc_chassis_create_procfs); | |
300 | ||
301 | #endif /* CONFIG_PROC_FS */ | |
302 | #endif /* CONFIG_PDC_CHASSIS_WARN */ |