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1da177e4 LT |
1 | /* |
2 | * interfaces to log Chassis Codes via PDC (firmware) | |
3 | * | |
4 | * Copyright (C) 2002 Laurent Canet <canetl@esiee.fr> | |
5 | * Copyright (C) 2002-2004 Thibaut VARENE <varenet@parisc-linux.org> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | ||
22 | #undef PDC_CHASSIS_DEBUG | |
23 | #ifdef PDC_CHASSIS_DEBUG | |
24 | #define DPRINTK(fmt, args...) printk(fmt, ## args) | |
25 | #else | |
26 | #define DPRINTK(fmt, args...) | |
27 | #endif | |
28 | ||
29 | #include <linux/init.h> | |
30 | #include <linux/kernel.h> | |
31 | #include <linux/reboot.h> | |
32 | #include <linux/notifier.h> | |
33 | ||
34 | #include <asm/pdc_chassis.h> | |
35 | #include <asm/processor.h> | |
36 | #include <asm/pdc.h> | |
37 | #include <asm/pdcpat.h> | |
38 | ||
39 | ||
40 | #ifdef CONFIG_PDC_CHASSIS | |
41 | static int pdc_chassis_old = 0; | |
42 | static unsigned int pdc_chassis_enabled = 1; | |
43 | ||
44 | ||
45 | /** | |
46 | * pdc_chassis_setup() - Enable/disable pdc_chassis code at boot time. | |
47 | * @str configuration param: 0 to disable chassis log | |
48 | * @return 1 | |
49 | */ | |
50 | ||
51 | static int __init pdc_chassis_setup(char *str) | |
52 | { | |
53 | /*panic_timeout = simple_strtoul(str, NULL, 0);*/ | |
54 | get_option(&str, &pdc_chassis_enabled); | |
55 | return 1; | |
56 | } | |
57 | __setup("pdcchassis=", pdc_chassis_setup); | |
58 | ||
59 | ||
60 | /** | |
61 | * pdc_chassis_checkold() - Checks for old PDC_CHASSIS compatibility | |
62 | * @pdc_chassis_old: 1 if old pdc chassis style | |
63 | * | |
64 | * Currently, only E class and A180 are known to work with this. | |
65 | * Inspired by Christoph Plattner | |
66 | */ | |
67 | ||
68 | static void __init pdc_chassis_checkold(void) | |
69 | { | |
70 | switch(CPU_HVERSION) { | |
71 | case 0x480: /* E25 */ | |
72 | case 0x481: /* E35 */ | |
73 | case 0x482: /* E45 */ | |
74 | case 0x483: /* E55 */ | |
75 | case 0x516: /* A180 */ | |
76 | pdc_chassis_old = 1; | |
77 | break; | |
78 | ||
79 | default: | |
80 | break; | |
81 | } | |
82 | DPRINTK(KERN_DEBUG "%s: pdc_chassis_checkold(); pdc_chassis_old = %d\n", __FILE__, pdc_chassis_old); | |
83 | } | |
84 | ||
85 | ||
86 | /** | |
87 | * pdc_chassis_panic_event() - Called by the panic handler. | |
88 | * | |
89 | * As soon as a panic occurs, we should inform the PDC. | |
90 | */ | |
91 | ||
92 | static int pdc_chassis_panic_event(struct notifier_block *this, | |
93 | unsigned long event, void *ptr) | |
94 | { | |
95 | pdc_chassis_send_status(PDC_CHASSIS_DIRECT_PANIC); | |
96 | return NOTIFY_DONE; | |
97 | } | |
98 | ||
99 | ||
100 | static struct notifier_block pdc_chassis_panic_block = { | |
101 | .notifier_call = pdc_chassis_panic_event, | |
102 | .priority = INT_MAX, | |
103 | }; | |
104 | ||
105 | ||
106 | /** | |
107 | * parisc_reboot_event() - Called by the reboot handler. | |
108 | * | |
109 | * As soon as a reboot occurs, we should inform the PDC. | |
110 | */ | |
111 | ||
112 | static int pdc_chassis_reboot_event(struct notifier_block *this, | |
113 | unsigned long event, void *ptr) | |
114 | { | |
115 | pdc_chassis_send_status(PDC_CHASSIS_DIRECT_SHUTDOWN); | |
116 | return NOTIFY_DONE; | |
117 | } | |
118 | ||
119 | ||
120 | static struct notifier_block pdc_chassis_reboot_block = { | |
121 | .notifier_call = pdc_chassis_reboot_event, | |
122 | .priority = INT_MAX, | |
123 | }; | |
124 | #endif /* CONFIG_PDC_CHASSIS */ | |
125 | ||
126 | ||
127 | /** | |
128 | * parisc_pdc_chassis_init() - Called at boot time. | |
129 | */ | |
130 | ||
131 | void __init parisc_pdc_chassis_init(void) | |
132 | { | |
133 | #ifdef CONFIG_PDC_CHASSIS | |
134 | int handle = 0; | |
135 | if (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 | /* Check for PDC_PAT or old LED Panel */ | |
140 | pdc_chassis_checkold(); | |
141 | if (is_pdc_pat()) { | |
142 | printk(KERN_INFO "Enabling PDC_PAT chassis codes support.\n"); | |
143 | handle = 1; | |
144 | } | |
145 | else if (pdc_chassis_old) { | |
146 | printk(KERN_INFO "Enabling old style chassis LED panel support.\n"); | |
147 | handle = 1; | |
148 | } | |
149 | ||
150 | if (handle) { | |
151 | /* initialize panic notifier chain */ | |
152 | notifier_chain_register(&panic_notifier_list, &pdc_chassis_panic_block); | |
153 | ||
154 | /* initialize reboot notifier chain */ | |
155 | register_reboot_notifier(&pdc_chassis_reboot_block); | |
156 | } | |
157 | } | |
158 | #endif /* CONFIG_PDC_CHASSIS */ | |
159 | } | |
160 | ||
161 | ||
162 | /** | |
163 | * pdc_chassis_send_status() - Sends a predefined message to the chassis, | |
164 | * and changes the front panel LEDs according to the new system state | |
165 | * @retval: PDC call return value. | |
166 | * | |
167 | * Only machines with 64 bits PDC PAT and those reported in | |
168 | * pdc_chassis_checkold() are supported atm. | |
169 | * | |
170 | * returns 0 if no error, -1 if no supported PDC is present or invalid message, | |
171 | * else returns the appropriate PDC error code. | |
172 | * | |
173 | * For a list of predefined messages, see asm-parisc/pdc_chassis.h | |
174 | */ | |
175 | ||
176 | int pdc_chassis_send_status(int message) | |
177 | { | |
178 | /* Maybe we should do that in an other way ? */ | |
179 | int retval = 0; | |
180 | #ifdef CONFIG_PDC_CHASSIS | |
181 | if (pdc_chassis_enabled) { | |
182 | ||
183 | DPRINTK(KERN_DEBUG "%s: pdc_chassis_send_status(%d)\n", __FILE__, message); | |
184 | ||
185 | #ifdef CONFIG_64BIT | |
186 | if (is_pdc_pat()) { | |
187 | switch(message) { | |
188 | case PDC_CHASSIS_DIRECT_BSTART: | |
189 | retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_BSTART, PDC_CHASSIS_LSTATE_RUN_NORMAL); | |
190 | break; | |
191 | ||
192 | case PDC_CHASSIS_DIRECT_BCOMPLETE: | |
193 | retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_BCOMPLETE, PDC_CHASSIS_LSTATE_RUN_NORMAL); | |
194 | break; | |
195 | ||
196 | case PDC_CHASSIS_DIRECT_SHUTDOWN: | |
197 | retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_SHUTDOWN, PDC_CHASSIS_LSTATE_NONOS); | |
198 | break; | |
199 | ||
200 | case PDC_CHASSIS_DIRECT_PANIC: | |
201 | retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_PANIC, PDC_CHASSIS_LSTATE_RUN_CRASHREC); | |
202 | break; | |
203 | ||
204 | case PDC_CHASSIS_DIRECT_LPMC: | |
205 | retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_LPMC, PDC_CHASSIS_LSTATE_RUN_SYSINT); | |
206 | break; | |
207 | ||
208 | case PDC_CHASSIS_DIRECT_HPMC: | |
209 | retval = pdc_pat_chassis_send_log(PDC_CHASSIS_PMSG_HPMC, PDC_CHASSIS_LSTATE_RUN_NCRIT); | |
210 | break; | |
211 | ||
212 | default: | |
213 | retval = -1; | |
214 | } | |
215 | } else retval = -1; | |
216 | #else | |
217 | if (pdc_chassis_old) { | |
218 | switch (message) { | |
219 | case PDC_CHASSIS_DIRECT_BSTART: | |
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 | } |