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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> | |
33 | #include <linux/kernel.h> | |
34 | #include <linux/reboot.h> | |
35 | #include <linux/notifier.h> | |
8039de10 | 36 | #include <linux/cache.h> |
8ffaeaf4 | 37 | #include <linux/proc_fs.h> |
1da177e4 LT |
38 | |
39 | #include <asm/pdc_chassis.h> | |
40 | #include <asm/processor.h> | |
41 | #include <asm/pdc.h> | |
42 | #include <asm/pdcpat.h> | |
43 | ||
9b0703fe | 44 | #define PDC_CHASSIS_VER "0.05" |
1da177e4 LT |
45 | |
46 | #ifdef CONFIG_PDC_CHASSIS | |
8039de10 | 47 | static unsigned int pdc_chassis_enabled __read_mostly = 1; |
1da177e4 LT |
48 | |
49 | ||
50 | /** | |
51 | * pdc_chassis_setup() - Enable/disable pdc_chassis code at boot time. | |
52 | * @str configuration param: 0 to disable chassis log | |
53 | * @return 1 | |
54 | */ | |
55 | ||
56 | static int __init pdc_chassis_setup(char *str) | |
57 | { | |
58 | /*panic_timeout = simple_strtoul(str, NULL, 0);*/ | |
59 | get_option(&str, &pdc_chassis_enabled); | |
60 | return 1; | |
61 | } | |
62 | __setup("pdcchassis=", pdc_chassis_setup); | |
63 | ||
64 | ||
65 | /** | |
66 | * pdc_chassis_checkold() - Checks for old PDC_CHASSIS compatibility | |
67 | * @pdc_chassis_old: 1 if old pdc chassis style | |
68 | * | |
69 | * Currently, only E class and A180 are known to work with this. | |
70 | * Inspired by Christoph Plattner | |
71 | */ | |
8ffaeaf4 | 72 | #if 0 |
1da177e4 LT |
73 | static void __init pdc_chassis_checkold(void) |
74 | { | |
75 | switch(CPU_HVERSION) { | |
76 | case 0x480: /* E25 */ | |
77 | case 0x481: /* E35 */ | |
78 | case 0x482: /* E45 */ | |
79 | case 0x483: /* E55 */ | |
80 | case 0x516: /* A180 */ | |
1da177e4 LT |
81 | break; |
82 | ||
83 | default: | |
84 | break; | |
85 | } | |
86 | DPRINTK(KERN_DEBUG "%s: pdc_chassis_checkold(); pdc_chassis_old = %d\n", __FILE__, pdc_chassis_old); | |
87 | } | |
8ffaeaf4 | 88 | #endif |
1da177e4 LT |
89 | |
90 | /** | |
91 | * pdc_chassis_panic_event() - Called by the panic handler. | |
92 | * | |
93 | * As soon as a panic occurs, we should inform the PDC. | |
94 | */ | |
95 | ||
96 | static int pdc_chassis_panic_event(struct notifier_block *this, | |
97 | unsigned long event, void *ptr) | |
98 | { | |
99 | pdc_chassis_send_status(PDC_CHASSIS_DIRECT_PANIC); | |
100 | return NOTIFY_DONE; | |
101 | } | |
102 | ||
103 | ||
104 | static struct notifier_block pdc_chassis_panic_block = { | |
105 | .notifier_call = pdc_chassis_panic_event, | |
106 | .priority = INT_MAX, | |
107 | }; | |
108 | ||
109 | ||
110 | /** | |
111 | * parisc_reboot_event() - Called by the reboot handler. | |
112 | * | |
113 | * As soon as a reboot occurs, we should inform the PDC. | |
114 | */ | |
115 | ||
116 | static int pdc_chassis_reboot_event(struct notifier_block *this, | |
117 | unsigned long event, void *ptr) | |
118 | { | |
119 | pdc_chassis_send_status(PDC_CHASSIS_DIRECT_SHUTDOWN); | |
120 | return NOTIFY_DONE; | |
121 | } | |
122 | ||
123 | ||
124 | static struct notifier_block pdc_chassis_reboot_block = { | |
125 | .notifier_call = pdc_chassis_reboot_event, | |
126 | .priority = INT_MAX, | |
127 | }; | |
128 | #endif /* CONFIG_PDC_CHASSIS */ | |
129 | ||
130 | ||
131 | /** | |
132 | * parisc_pdc_chassis_init() - Called at boot time. | |
133 | */ | |
134 | ||
135 | void __init parisc_pdc_chassis_init(void) | |
136 | { | |
137 | #ifdef CONFIG_PDC_CHASSIS | |
8039de10 | 138 | if (likely(pdc_chassis_enabled)) { |
1da177e4 LT |
139 | DPRINTK(KERN_DEBUG "%s: parisc_pdc_chassis_init()\n", __FILE__); |
140 | ||
141 | /* Let see if we have something to handle... */ | |
9b0703fe TV |
142 | printk(KERN_INFO "Enabling %s chassis codes support v%s\n", |
143 | is_pdc_pat() ? "PDC_PAT" : "regular", | |
144 | PDC_CHASSIS_VER); | |
145 | ||
146 | /* initialize panic notifier chain */ | |
147 | atomic_notifier_chain_register(&panic_notifier_list, | |
148 | &pdc_chassis_panic_block); | |
149 | ||
150 | /* initialize reboot notifier chain */ | |
151 | register_reboot_notifier(&pdc_chassis_reboot_block); | |
1da177e4 LT |
152 | } |
153 | #endif /* CONFIG_PDC_CHASSIS */ | |
154 | } | |
155 | ||
156 | ||
157 | /** | |
158 | * pdc_chassis_send_status() - Sends a predefined message to the chassis, | |
159 | * and changes the front panel LEDs according to the new system state | |
160 | * @retval: PDC call return value. | |
161 | * | |
162 | * Only machines with 64 bits PDC PAT and those reported in | |
163 | * pdc_chassis_checkold() are supported atm. | |
164 | * | |
165 | * returns 0 if no error, -1 if no supported PDC is present or invalid message, | |
166 | * else returns the appropriate PDC error code. | |
167 | * | |
168 | * For a list of predefined messages, see asm-parisc/pdc_chassis.h | |
169 | */ | |
170 | ||
171 | int pdc_chassis_send_status(int message) | |
172 | { | |
173 | /* Maybe we should do that in an other way ? */ | |
174 | int retval = 0; | |
175 | #ifdef CONFIG_PDC_CHASSIS | |
8039de10 | 176 | if (likely(pdc_chassis_enabled)) { |
1da177e4 LT |
177 | |
178 | DPRINTK(KERN_DEBUG "%s: pdc_chassis_send_status(%d)\n", __FILE__, message); | |
179 | ||
180 | #ifdef CONFIG_64BIT | |
181 | if (is_pdc_pat()) { | |
182 | switch(message) { | |
183 | case PDC_CHASSIS_DIRECT_BSTART: | |
184 | retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_BSTART, PDC_CHASSIS_LSTATE_RUN_NORMAL); | |
185 | break; | |
186 | ||
187 | case PDC_CHASSIS_DIRECT_BCOMPLETE: | |
188 | retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_BCOMPLETE, PDC_CHASSIS_LSTATE_RUN_NORMAL); | |
189 | break; | |
190 | ||
191 | case PDC_CHASSIS_DIRECT_SHUTDOWN: | |
192 | retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_SHUTDOWN, PDC_CHASSIS_LSTATE_NONOS); | |
193 | break; | |
194 | ||
195 | case PDC_CHASSIS_DIRECT_PANIC: | |
196 | retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_PANIC, PDC_CHASSIS_LSTATE_RUN_CRASHREC); | |
197 | break; | |
198 | ||
199 | case PDC_CHASSIS_DIRECT_LPMC: | |
200 | retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_LPMC, PDC_CHASSIS_LSTATE_RUN_SYSINT); | |
201 | break; | |
202 | ||
203 | case PDC_CHASSIS_DIRECT_HPMC: | |
204 | retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_HPMC, PDC_CHASSIS_LSTATE_RUN_NCRIT); | |
205 | break; | |
206 | ||
207 | default: | |
208 | retval = -1; | |
209 | } | |
210 | } else retval = -1; | |
211 | #else | |
8ffaeaf4 | 212 | if (1) { |
1da177e4 LT |
213 | switch (message) { |
214 | case PDC_CHASSIS_DIRECT_BSTART: | |
8ffaeaf4 TV |
215 | retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_INIT)); |
216 | break; | |
217 | ||
1da177e4 LT |
218 | case PDC_CHASSIS_DIRECT_BCOMPLETE: |
219 | retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_RUN)); | |
220 | break; | |
221 | ||
222 | case PDC_CHASSIS_DIRECT_SHUTDOWN: | |
223 | retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_SHUT)); | |
224 | break; | |
225 | ||
226 | case PDC_CHASSIS_DIRECT_HPMC: | |
227 | case PDC_CHASSIS_DIRECT_PANIC: | |
228 | retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_FLT)); | |
229 | break; | |
230 | ||
231 | case PDC_CHASSIS_DIRECT_LPMC: | |
232 | retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_WARN)); | |
233 | break; | |
234 | ||
235 | default: | |
236 | retval = -1; | |
237 | } | |
238 | } else retval = -1; | |
239 | #endif /* CONFIG_64BIT */ | |
240 | } /* if (pdc_chassis_enabled) */ | |
241 | #endif /* CONFIG_PDC_CHASSIS */ | |
242 | return retval; | |
243 | } | |
8ffaeaf4 TV |
244 | |
245 | #ifdef CONFIG_PDC_CHASSIS_WARN | |
246 | #ifdef CONFIG_PROC_FS | |
247 | static int pdc_chassis_warn_pread(char *page, char **start, off_t off, | |
248 | int count, int *eof, void *data) | |
249 | { | |
250 | char *out = page; | |
251 | int len, ret; | |
252 | unsigned long warn; | |
253 | u32 warnreg; | |
254 | ||
255 | ret = pdc_chassis_warn(&warn); | |
256 | if (ret != PDC_OK) | |
257 | return -EIO; | |
258 | ||
259 | warnreg = (warn & 0xFFFFFFFF); | |
260 | ||
261 | if ((warnreg >> 24) & 0xFF) | |
262 | out += sprintf(out, "Chassis component failure! (eg fan or PSU): 0x%.2x\n", ((warnreg >> 24) & 0xFF)); | |
263 | ||
264 | out += sprintf(out, "Battery: %s\n", (warnreg & 0x04) ? "Low!" : "OK"); | |
265 | out += sprintf(out, "Temp low: %s\n", (warnreg & 0x02) ? "Exceeded!" : "OK"); | |
266 | out += sprintf(out, "Temp mid: %s\n", (warnreg & 0x01) ? "Exceeded!" : "OK"); | |
267 | ||
268 | len = out - page - off; | |
269 | if (len < count) { | |
270 | *eof = 1; | |
271 | if (len <= 0) return 0; | |
272 | } else { | |
273 | len = count; | |
274 | } | |
275 | *start = page + off; | |
276 | return len; | |
277 | } | |
278 | ||
279 | static int __init pdc_chassis_create_procfs(void) | |
280 | { | |
9b0703fe TV |
281 | unsigned long test; |
282 | int ret; | |
283 | ||
284 | ret = pdc_chassis_warn(&test); | |
285 | if ((ret == PDC_BAD_PROC) || (ret == PDC_BAD_OPTION)) { | |
286 | /* seems that some boxes (eg L1000) do not implement this */ | |
287 | printk(KERN_INFO "Chassis warnings not supported.\n"); | |
288 | return 0; | |
289 | } | |
290 | ||
291 | printk(KERN_INFO "Enabling PDC chassis warnings support v%s\n", | |
292 | PDC_CHASSIS_VER); | |
8ffaeaf4 TV |
293 | create_proc_read_entry("chassis", 0400, NULL, pdc_chassis_warn_pread, |
294 | NULL); | |
295 | return 0; | |
296 | } | |
297 | ||
298 | __initcall(pdc_chassis_create_procfs); | |
299 | ||
300 | #endif /* CONFIG_PROC_FS */ | |
301 | #endif /* CONFIG_PDC_CHASSIS_WARN */ |