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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * interfaces to Chassis Codes via PDC (firmware)
4 *
5 * Copyright (C) 2002 Laurent Canet <canetl@esiee.fr>
6 * Copyright (C) 2002-2006 Thibaut VARENE <varenet@parisc-linux.org>
7 *
8 * TODO: poll chassis warns, trigger (configurable) machine shutdown when
9 * needed.
10 * Find out how to get Chassis warnings out of PAT boxes?
11 */
12
13#undef PDC_CHASSIS_DEBUG
14#ifdef PDC_CHASSIS_DEBUG
15#define DPRINTK(fmt, args...) printk(fmt, ## args)
16#else
17#define DPRINTK(fmt, args...)
18#endif
19
20#include <linux/init.h>
21#include <linux/module.h>
22#include <linux/kernel.h>
23#include <linux/reboot.h>
24#include <linux/notifier.h>
25#include <linux/cache.h>
26#include <linux/proc_fs.h>
27#include <linux/seq_file.h>
28
29#include <asm/pdc_chassis.h>
30#include <asm/processor.h>
31#include <asm/pdc.h>
32#include <asm/pdcpat.h>
33
34#define PDC_CHASSIS_VER "0.05"
35
36#ifdef CONFIG_PDC_CHASSIS
37static unsigned int pdc_chassis_enabled __read_mostly = 1;
38
39
40/**
41 * pdc_chassis_setup() - Enable/disable pdc_chassis code at boot time.
42 * @str configuration param: 0 to disable chassis log
43 * @return 1
44 */
45
46static int __init pdc_chassis_setup(char *str)
47{
48 /*panic_timeout = simple_strtoul(str, NULL, 0);*/
49 get_option(&str, &pdc_chassis_enabled);
50 return 1;
51}
52__setup("pdcchassis=", pdc_chassis_setup);
53
54
55/**
56 * pdc_chassis_checkold() - Checks for old PDC_CHASSIS compatibility
57 * @pdc_chassis_old: 1 if old pdc chassis style
58 *
59 * Currently, only E class and A180 are known to work with this.
60 * Inspired by Christoph Plattner
61 */
62#if 0
63static void __init pdc_chassis_checkold(void)
64{
65 switch(CPU_HVERSION) {
66 case 0x480: /* E25 */
67 case 0x481: /* E35 */
68 case 0x482: /* E45 */
69 case 0x483: /* E55 */
70 case 0x516: /* A180 */
71 break;
72
73 default:
74 break;
75 }
76 DPRINTK(KERN_DEBUG "%s: pdc_chassis_checkold(); pdc_chassis_old = %d\n", __FILE__, pdc_chassis_old);
77}
78#endif
79
80/**
81 * pdc_chassis_panic_event() - Called by the panic handler.
82 *
83 * As soon as a panic occurs, we should inform the PDC.
84 */
85
86static int pdc_chassis_panic_event(struct notifier_block *this,
87 unsigned long event, void *ptr)
88{
89 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_PANIC);
90 return NOTIFY_DONE;
91}
92
93
94static struct notifier_block pdc_chassis_panic_block = {
95 .notifier_call = pdc_chassis_panic_event,
96 .priority = INT_MAX,
97};
98
99
100/**
101 * parisc_reboot_event() - Called by the reboot handler.
102 *
103 * As soon as a reboot occurs, we should inform the PDC.
104 */
105
106static int pdc_chassis_reboot_event(struct notifier_block *this,
107 unsigned long event, void *ptr)
108{
109 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_SHUTDOWN);
110 return NOTIFY_DONE;
111}
112
113
114static struct notifier_block pdc_chassis_reboot_block = {
115 .notifier_call = pdc_chassis_reboot_event,
116 .priority = INT_MAX,
117};
118#endif /* CONFIG_PDC_CHASSIS */
119
120
121/**
122 * parisc_pdc_chassis_init() - Called at boot time.
123 */
124
125void __init parisc_pdc_chassis_init(void)
126{
127#ifdef CONFIG_PDC_CHASSIS
128 if (likely(pdc_chassis_enabled)) {
129 DPRINTK(KERN_DEBUG "%s: parisc_pdc_chassis_init()\n", __FILE__);
130
131 /* Let see if we have something to handle... */
132 printk(KERN_INFO "Enabling %s chassis codes support v%s\n",
133 is_pdc_pat() ? "PDC_PAT" : "regular",
134 PDC_CHASSIS_VER);
135
136 /* initialize panic notifier chain */
137 atomic_notifier_chain_register(&panic_notifier_list,
138 &pdc_chassis_panic_block);
139
140 /* initialize reboot notifier chain */
141 register_reboot_notifier(&pdc_chassis_reboot_block);
142 }
143#endif /* CONFIG_PDC_CHASSIS */
144}
145
146
147/**
148 * pdc_chassis_send_status() - Sends a predefined message to the chassis,
149 * and changes the front panel LEDs according to the new system state
150 * @retval: PDC call return value.
151 *
152 * Only machines with 64 bits PDC PAT and those reported in
153 * pdc_chassis_checkold() are supported atm.
154 *
155 * returns 0 if no error, -1 if no supported PDC is present or invalid message,
156 * else returns the appropriate PDC error code.
157 *
158 * For a list of predefined messages, see asm-parisc/pdc_chassis.h
159 */
160
161int pdc_chassis_send_status(int message)
162{
163 /* Maybe we should do that in an other way ? */
164 int retval = 0;
165#ifdef CONFIG_PDC_CHASSIS
166 if (likely(pdc_chassis_enabled)) {
167
168 DPRINTK(KERN_DEBUG "%s: pdc_chassis_send_status(%d)\n", __FILE__, message);
169
170#ifdef CONFIG_64BIT
171 if (is_pdc_pat()) {
172 switch(message) {
173 case PDC_CHASSIS_DIRECT_BSTART:
174 retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_BSTART, PDC_CHASSIS_LSTATE_RUN_NORMAL);
175 break;
176
177 case PDC_CHASSIS_DIRECT_BCOMPLETE:
178 retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_BCOMPLETE, PDC_CHASSIS_LSTATE_RUN_NORMAL);
179 break;
180
181 case PDC_CHASSIS_DIRECT_SHUTDOWN:
182 retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_SHUTDOWN, PDC_CHASSIS_LSTATE_NONOS);
183 break;
184
185 case PDC_CHASSIS_DIRECT_PANIC:
186 retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_PANIC, PDC_CHASSIS_LSTATE_RUN_CRASHREC);
187 break;
188
189 case PDC_CHASSIS_DIRECT_LPMC:
190 retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_LPMC, PDC_CHASSIS_LSTATE_RUN_SYSINT);
191 break;
192
193 case PDC_CHASSIS_DIRECT_HPMC:
194 retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_HPMC, PDC_CHASSIS_LSTATE_RUN_NCRIT);
195 break;
196
197 default:
198 retval = -1;
199 }
200 } else retval = -1;
201#else
202 if (1) {
203 switch (message) {
204 case PDC_CHASSIS_DIRECT_BSTART:
205 retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_INIT));
206 break;
207
208 case PDC_CHASSIS_DIRECT_BCOMPLETE:
209 retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_RUN));
210 break;
211
212 case PDC_CHASSIS_DIRECT_SHUTDOWN:
213 retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_SHUT));
214 break;
215
216 case PDC_CHASSIS_DIRECT_HPMC:
217 case PDC_CHASSIS_DIRECT_PANIC:
218 retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_FLT));
219 break;
220
221 case PDC_CHASSIS_DIRECT_LPMC:
222 retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_WARN));
223 break;
224
225 default:
226 retval = -1;
227 }
228 } else retval = -1;
229#endif /* CONFIG_64BIT */
230 } /* if (pdc_chassis_enabled) */
231#endif /* CONFIG_PDC_CHASSIS */
232 return retval;
233}
234
235#ifdef CONFIG_PDC_CHASSIS_WARN
236#ifdef CONFIG_PROC_FS
237static int pdc_chassis_warn_show(struct seq_file *m, void *v)
238{
239 unsigned long warn;
240 u32 warnreg;
241
242 if (pdc_chassis_warn(&warn) != PDC_OK)
243 return -EIO;
244
245 warnreg = (warn & 0xFFFFFFFF);
246
247 if ((warnreg >> 24) & 0xFF)
248 seq_printf(m, "Chassis component failure! (eg fan or PSU): 0x%.2x\n",
249 (warnreg >> 24) & 0xFF);
250
251 seq_printf(m, "Battery: %s\n", (warnreg & 0x04) ? "Low!" : "OK");
252 seq_printf(m, "Temp low: %s\n", (warnreg & 0x02) ? "Exceeded!" : "OK");
253 seq_printf(m, "Temp mid: %s\n", (warnreg & 0x01) ? "Exceeded!" : "OK");
254 return 0;
255}
256
257static int __init pdc_chassis_create_procfs(void)
258{
259 unsigned long test;
260 int ret;
261
262 ret = pdc_chassis_warn(&test);
263 if ((ret == PDC_BAD_PROC) || (ret == PDC_BAD_OPTION)) {
264 /* seems that some boxes (eg L1000) do not implement this */
265 printk(KERN_INFO "Chassis warnings not supported.\n");
266 return 0;
267 }
268
269 printk(KERN_INFO "Enabling PDC chassis warnings support v%s\n",
270 PDC_CHASSIS_VER);
271 proc_create_single("chassis", 0400, NULL, pdc_chassis_warn_show);
272 return 0;
273}
274
275__initcall(pdc_chassis_create_procfs);
276
277#endif /* CONFIG_PROC_FS */
278#endif /* CONFIG_PDC_CHASSIS_WARN */
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * interfaces to Chassis Codes via PDC (firmware)
4 *
5 * Copyright (C) 2002 Laurent Canet <canetl@esiee.fr>
6 * Copyright (C) 2002-2006 Thibaut VARENE <varenet@parisc-linux.org>
7 *
8 * TODO: poll chassis warns, trigger (configurable) machine shutdown when
9 * needed.
10 * Find out how to get Chassis warnings out of PAT boxes?
11 */
12
13#undef PDC_CHASSIS_DEBUG
14#ifdef PDC_CHASSIS_DEBUG
15#define DPRINTK(fmt, args...) printk(fmt, ## args)
16#else
17#define DPRINTK(fmt, args...)
18#endif
19
20#include <linux/init.h>
21#include <linux/module.h>
22#include <linux/kernel.h>
23#include <linux/panic_notifier.h>
24#include <linux/reboot.h>
25#include <linux/notifier.h>
26#include <linux/cache.h>
27#include <linux/proc_fs.h>
28#include <linux/seq_file.h>
29
30#include <asm/pdc_chassis.h>
31#include <asm/processor.h>
32#include <asm/pdc.h>
33#include <asm/pdcpat.h>
34
35#define PDC_CHASSIS_VER "0.05"
36
37#ifdef CONFIG_PDC_CHASSIS
38static unsigned int pdc_chassis_enabled __read_mostly = 1;
39
40
41/**
42 * pdc_chassis_setup() - Enable/disable pdc_chassis code at boot time.
43 * @str configuration param: 0 to disable chassis log
44 * @return 1
45 */
46
47static int __init pdc_chassis_setup(char *str)
48{
49 /*panic_timeout = simple_strtoul(str, NULL, 0);*/
50 get_option(&str, &pdc_chassis_enabled);
51 return 1;
52}
53__setup("pdcchassis=", pdc_chassis_setup);
54
55
56/**
57 * pdc_chassis_checkold() - Checks for old PDC_CHASSIS compatibility
58 * @pdc_chassis_old: 1 if old pdc chassis style
59 *
60 * Currently, only E class and A180 are known to work with this.
61 * Inspired by Christoph Plattner
62 */
63#if 0
64static void __init pdc_chassis_checkold(void)
65{
66 switch(CPU_HVERSION) {
67 case 0x480: /* E25 */
68 case 0x481: /* E35 */
69 case 0x482: /* E45 */
70 case 0x483: /* E55 */
71 case 0x516: /* A180 */
72 break;
73
74 default:
75 break;
76 }
77 DPRINTK(KERN_DEBUG "%s: pdc_chassis_checkold(); pdc_chassis_old = %d\n", __FILE__, pdc_chassis_old);
78}
79#endif
80
81/**
82 * pdc_chassis_panic_event() - Called by the panic handler.
83 *
84 * As soon as a panic occurs, we should inform the PDC.
85 */
86
87static int pdc_chassis_panic_event(struct notifier_block *this,
88 unsigned long event, void *ptr)
89{
90 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_PANIC);
91 return NOTIFY_DONE;
92}
93
94
95static struct notifier_block pdc_chassis_panic_block = {
96 .notifier_call = pdc_chassis_panic_event,
97 .priority = INT_MAX,
98};
99
100
101/**
102 * parisc_reboot_event() - Called by the reboot handler.
103 *
104 * As soon as a reboot occurs, we should inform the PDC.
105 */
106
107static int pdc_chassis_reboot_event(struct notifier_block *this,
108 unsigned long event, void *ptr)
109{
110 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_SHUTDOWN);
111 return NOTIFY_DONE;
112}
113
114
115static struct notifier_block pdc_chassis_reboot_block = {
116 .notifier_call = pdc_chassis_reboot_event,
117 .priority = INT_MAX,
118};
119#endif /* CONFIG_PDC_CHASSIS */
120
121
122/**
123 * parisc_pdc_chassis_init() - Called at boot time.
124 */
125
126void __init parisc_pdc_chassis_init(void)
127{
128#ifdef CONFIG_PDC_CHASSIS
129 if (likely(pdc_chassis_enabled)) {
130 DPRINTK(KERN_DEBUG "%s: parisc_pdc_chassis_init()\n", __FILE__);
131
132 /* Let see if we have something to handle... */
133 printk(KERN_INFO "Enabling %s chassis codes support v%s\n",
134 is_pdc_pat() ? "PDC_PAT" : "regular",
135 PDC_CHASSIS_VER);
136
137 /* initialize panic notifier chain */
138 atomic_notifier_chain_register(&panic_notifier_list,
139 &pdc_chassis_panic_block);
140
141 /* initialize reboot notifier chain */
142 register_reboot_notifier(&pdc_chassis_reboot_block);
143 }
144#endif /* CONFIG_PDC_CHASSIS */
145}
146
147
148/**
149 * pdc_chassis_send_status() - Sends a predefined message to the chassis,
150 * and changes the front panel LEDs according to the new system state
151 * @retval: PDC call return value.
152 *
153 * Only machines with 64 bits PDC PAT and those reported in
154 * pdc_chassis_checkold() are supported atm.
155 *
156 * returns 0 if no error, -1 if no supported PDC is present or invalid message,
157 * else returns the appropriate PDC error code.
158 *
159 * For a list of predefined messages, see asm-parisc/pdc_chassis.h
160 */
161
162int pdc_chassis_send_status(int message)
163{
164 /* Maybe we should do that in an other way ? */
165 int retval = 0;
166#ifdef CONFIG_PDC_CHASSIS
167 if (likely(pdc_chassis_enabled)) {
168
169 DPRINTK(KERN_DEBUG "%s: pdc_chassis_send_status(%d)\n", __FILE__, message);
170
171#ifdef CONFIG_64BIT
172 if (is_pdc_pat()) {
173 switch(message) {
174 case PDC_CHASSIS_DIRECT_BSTART:
175 retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_BSTART, PDC_CHASSIS_LSTATE_RUN_NORMAL);
176 break;
177
178 case PDC_CHASSIS_DIRECT_BCOMPLETE:
179 retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_BCOMPLETE, PDC_CHASSIS_LSTATE_RUN_NORMAL);
180 break;
181
182 case PDC_CHASSIS_DIRECT_SHUTDOWN:
183 retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_SHUTDOWN, PDC_CHASSIS_LSTATE_NONOS);
184 break;
185
186 case PDC_CHASSIS_DIRECT_PANIC:
187 retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_PANIC, PDC_CHASSIS_LSTATE_RUN_CRASHREC);
188 break;
189
190 case PDC_CHASSIS_DIRECT_LPMC:
191 retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_LPMC, PDC_CHASSIS_LSTATE_RUN_SYSINT);
192 break;
193
194 case PDC_CHASSIS_DIRECT_HPMC:
195 retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_HPMC, PDC_CHASSIS_LSTATE_RUN_NCRIT);
196 break;
197
198 default:
199 retval = -1;
200 }
201 } else retval = -1;
202#else
203 if (1) {
204 switch (message) {
205 case PDC_CHASSIS_DIRECT_BSTART:
206 retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_INIT));
207 break;
208
209 case PDC_CHASSIS_DIRECT_BCOMPLETE:
210 retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_RUN));
211 break;
212
213 case PDC_CHASSIS_DIRECT_SHUTDOWN:
214 retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_SHUT));
215 break;
216
217 case PDC_CHASSIS_DIRECT_HPMC:
218 case PDC_CHASSIS_DIRECT_PANIC:
219 retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_FLT));
220 break;
221
222 case PDC_CHASSIS_DIRECT_LPMC:
223 retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_WARN));
224 break;
225
226 default:
227 retval = -1;
228 }
229 } else retval = -1;
230#endif /* CONFIG_64BIT */
231 } /* if (pdc_chassis_enabled) */
232#endif /* CONFIG_PDC_CHASSIS */
233 return retval;
234}
235
236#ifdef CONFIG_PDC_CHASSIS_WARN
237#ifdef CONFIG_PROC_FS
238static int pdc_chassis_warn_show(struct seq_file *m, void *v)
239{
240 unsigned long warn;
241 u32 warnreg;
242
243 if (pdc_chassis_warn(&warn) != PDC_OK)
244 return -EIO;
245
246 warnreg = (warn & 0xFFFFFFFF);
247
248 if ((warnreg >> 24) & 0xFF)
249 seq_printf(m, "Chassis component failure! (eg fan or PSU): 0x%.2x\n",
250 (warnreg >> 24) & 0xFF);
251
252 seq_printf(m, "Battery: %s\n", (warnreg & 0x04) ? "Low!" : "OK");
253 seq_printf(m, "Temp low: %s\n", (warnreg & 0x02) ? "Exceeded!" : "OK");
254 seq_printf(m, "Temp mid: %s\n", (warnreg & 0x01) ? "Exceeded!" : "OK");
255 return 0;
256}
257
258static int __init pdc_chassis_create_procfs(void)
259{
260 unsigned long test;
261 int ret;
262
263 ret = pdc_chassis_warn(&test);
264 if ((ret == PDC_BAD_PROC) || (ret == PDC_BAD_OPTION)) {
265 /* seems that some boxes (eg L1000) do not implement this */
266 printk(KERN_INFO "Chassis warnings not supported.\n");
267 return 0;
268 }
269
270 printk(KERN_INFO "Enabling PDC chassis warnings support v%s\n",
271 PDC_CHASSIS_VER);
272 proc_create_single("chassis", 0400, NULL, pdc_chassis_warn_show);
273 return 0;
274}
275
276__initcall(pdc_chassis_create_procfs);
277
278#endif /* CONFIG_PROC_FS */
279#endif /* CONFIG_PDC_CHASSIS_WARN */