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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#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 */