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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/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#include <asm/led.h>
35
36#define PDC_CHASSIS_VER "0.05"
37
38#ifdef CONFIG_PDC_CHASSIS
39static unsigned int pdc_chassis_enabled __read_mostly = 1;
40
41
42/**
43 * pdc_chassis_setup() - Enable/disable pdc_chassis code at boot time.
44 * @str: configuration param: 0 to disable chassis log
45 * @return 1
46 */
47
48static int __init pdc_chassis_setup(char *str)
49{
50 /*panic_timeout = simple_strtoul(str, NULL, 0);*/
51 get_option(&str, &pdc_chassis_enabled);
52 return 1;
53}
54__setup("pdcchassis=", pdc_chassis_setup);
55
56
57/**
58 * pdc_chassis_checkold() - Checks for old PDC_CHASSIS compatibility
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 * @this: unused
84 * @event: unused
85 * @ptr: unused
86 *
87 * As soon as a panic occurs, we should inform the PDC.
88 */
89
90static int pdc_chassis_panic_event(struct notifier_block *this,
91 unsigned long event, void *ptr)
92{
93 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_PANIC);
94 return NOTIFY_DONE;
95}
96
97
98static struct notifier_block pdc_chassis_panic_block = {
99 .notifier_call = pdc_chassis_panic_event,
100 .priority = INT_MAX,
101};
102
103
104/**
105 * pdc_chassis_reboot_event() - Called by the reboot handler.
106 * @this: unused
107 * @event: unused
108 * @ptr: unused
109 *
110 * As soon as a reboot occurs, we should inform the PDC.
111 */
112
113static int pdc_chassis_reboot_event(struct notifier_block *this,
114 unsigned long event, void *ptr)
115{
116 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_SHUTDOWN);
117 return NOTIFY_DONE;
118}
119
120
121static struct notifier_block pdc_chassis_reboot_block = {
122 .notifier_call = pdc_chassis_reboot_event,
123 .priority = INT_MAX,
124};
125#endif /* CONFIG_PDC_CHASSIS */
126
127
128/**
129 * parisc_pdc_chassis_init() - Called at boot time.
130 */
131
132void __init parisc_pdc_chassis_init(void)
133{
134#ifdef CONFIG_PDC_CHASSIS
135 if (likely(pdc_chassis_enabled)) {
136 DPRINTK(KERN_DEBUG "%s: parisc_pdc_chassis_init()\n", __FILE__);
137
138 /* Let see if we have something to handle... */
139 printk(KERN_INFO "Enabling %s chassis codes support v%s\n",
140 is_pdc_pat() ? "PDC_PAT" : "regular",
141 PDC_CHASSIS_VER);
142
143 /* initialize panic notifier chain */
144 atomic_notifier_chain_register(&panic_notifier_list,
145 &pdc_chassis_panic_block);
146
147 /* initialize reboot notifier chain */
148 register_reboot_notifier(&pdc_chassis_reboot_block);
149 }
150#endif /* CONFIG_PDC_CHASSIS */
151}
152
153
154/**
155 * pdc_chassis_send_status() - Sends a predefined message to the chassis,
156 * and changes the front panel LEDs according to the new system state
157 * @message: Type of message, one of PDC_CHASSIS_DIRECT_* values.
158 *
159 * Only machines with 64 bits PDC PAT and those reported in
160 * pdc_chassis_checkold() are supported atm.
161 *
162 * returns 0 if no error, -1 if no supported PDC is present or invalid message,
163 * else returns the appropriate PDC error code.
164 *
165 * For a list of predefined messages, see asm-parisc/pdc_chassis.h
166 */
167
168int pdc_chassis_send_status(int message)
169{
170 /* Maybe we should do that in an other way ? */
171 int retval = 0;
172#ifdef CONFIG_PDC_CHASSIS
173 if (likely(pdc_chassis_enabled)) {
174
175 DPRINTK(KERN_DEBUG "%s: pdc_chassis_send_status(%d)\n", __FILE__, message);
176
177#ifdef CONFIG_64BIT
178 if (is_pdc_pat()) {
179 switch(message) {
180 case PDC_CHASSIS_DIRECT_BSTART:
181 retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_BSTART, PDC_CHASSIS_LSTATE_RUN_NORMAL);
182 break;
183
184 case PDC_CHASSIS_DIRECT_BCOMPLETE:
185 retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_BCOMPLETE, PDC_CHASSIS_LSTATE_RUN_NORMAL);
186 break;
187
188 case PDC_CHASSIS_DIRECT_SHUTDOWN:
189 retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_SHUTDOWN, PDC_CHASSIS_LSTATE_NONOS);
190 break;
191
192 case PDC_CHASSIS_DIRECT_PANIC:
193 retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_PANIC, PDC_CHASSIS_LSTATE_RUN_CRASHREC);
194 break;
195
196 case PDC_CHASSIS_DIRECT_LPMC:
197 retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_LPMC, PDC_CHASSIS_LSTATE_RUN_SYSINT);
198 break;
199
200 case PDC_CHASSIS_DIRECT_HPMC:
201 retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_HPMC, PDC_CHASSIS_LSTATE_RUN_NCRIT);
202 break;
203
204 default:
205 retval = -1;
206 }
207 } else retval = -1;
208#else
209 if (1) {
210 switch (message) {
211 case PDC_CHASSIS_DIRECT_BSTART:
212 retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_INIT));
213 break;
214
215 case PDC_CHASSIS_DIRECT_BCOMPLETE:
216 retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_RUN));
217 break;
218
219 case PDC_CHASSIS_DIRECT_SHUTDOWN:
220 retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_SHUT));
221 break;
222
223 case PDC_CHASSIS_DIRECT_HPMC:
224 case PDC_CHASSIS_DIRECT_PANIC:
225 retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_FLT));
226 break;
227
228 case PDC_CHASSIS_DIRECT_LPMC:
229 retval = pdc_chassis_disp(PDC_CHASSIS_DISP_DATA(OSTAT_WARN));
230 break;
231
232 default:
233 retval = -1;
234 }
235 } else retval = -1;
236#endif /* CONFIG_64BIT */
237 } /* if (pdc_chassis_enabled) */
238
239 /* if system has LCD display, update current string */
240 if (retval != -1 && IS_ENABLED(CONFIG_CHASSIS_LCD_LED))
241 lcd_print(NULL);
242
243#endif /* CONFIG_PDC_CHASSIS */
244 return retval;
245}
246
247#ifdef CONFIG_PDC_CHASSIS_WARN
248#ifdef CONFIG_PROC_FS
249static int pdc_chassis_warn_show(struct seq_file *m, void *v)
250{
251 unsigned long warn;
252 u32 warnreg;
253
254 if (pdc_chassis_warn(&warn) != PDC_OK)
255 return -EIO;
256
257 warnreg = (warn & 0xFFFFFFFF);
258
259 if ((warnreg >> 24) & 0xFF)
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
269static int __init pdc_chassis_create_procfs(void)
270{
271 unsigned long test;
272 int ret;
273
274 ret = pdc_chassis_warn(&test);
275 if ((ret == PDC_BAD_PROC) || (ret == PDC_BAD_OPTION)) {
276 /* seems that some boxes (eg L1000) do not implement this */
277 printk(KERN_INFO "Chassis warnings not supported.\n");
278 return 0;
279 }
280
281 printk(KERN_INFO "Enabling PDC chassis warnings support v%s\n",
282 PDC_CHASSIS_VER);
283 proc_create_single("chassis", 0400, NULL, pdc_chassis_warn_show);
284 return 0;
285}
286
287__initcall(pdc_chassis_create_procfs);
288
289#endif /* CONFIG_PROC_FS */
290#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 */