sh: improve sh7785lcr power off code
[linux-2.6] / drivers / acpi / debug.c
1 /*
2  * debug.c - ACPI debug interface to userspace.
3  */
4
5 #include <linux/proc_fs.h>
6 #include <linux/init.h>
7 #include <linux/module.h>
8 #include <linux/kernel.h>
9 #include <linux/moduleparam.h>
10 #include <asm/uaccess.h>
11 #include <acpi/acpi_drivers.h>
12
13 #define _COMPONENT              ACPI_SYSTEM_COMPONENT
14 ACPI_MODULE_NAME("debug");
15
16 #ifdef MODULE_PARAM_PREFIX
17 #undef MODULE_PARAM_PREFIX
18 #endif
19 #define MODULE_PARAM_PREFIX "acpi."
20
21 struct acpi_dlayer {
22         const char *name;
23         unsigned long value;
24 };
25 struct acpi_dlevel {
26         const char *name;
27         unsigned long value;
28 };
29 #define ACPI_DEBUG_INIT(v)      { .name = #v, .value = v }
30
31 static const struct acpi_dlayer acpi_debug_layers[] = {
32         ACPI_DEBUG_INIT(ACPI_UTILITIES),
33         ACPI_DEBUG_INIT(ACPI_HARDWARE),
34         ACPI_DEBUG_INIT(ACPI_EVENTS),
35         ACPI_DEBUG_INIT(ACPI_TABLES),
36         ACPI_DEBUG_INIT(ACPI_NAMESPACE),
37         ACPI_DEBUG_INIT(ACPI_PARSER),
38         ACPI_DEBUG_INIT(ACPI_DISPATCHER),
39         ACPI_DEBUG_INIT(ACPI_EXECUTER),
40         ACPI_DEBUG_INIT(ACPI_RESOURCES),
41         ACPI_DEBUG_INIT(ACPI_CA_DEBUGGER),
42         ACPI_DEBUG_INIT(ACPI_OS_SERVICES),
43         ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER),
44         ACPI_DEBUG_INIT(ACPI_COMPILER),
45         ACPI_DEBUG_INIT(ACPI_TOOLS),
46
47         ACPI_DEBUG_INIT(ACPI_BUS_COMPONENT),
48         ACPI_DEBUG_INIT(ACPI_AC_COMPONENT),
49         ACPI_DEBUG_INIT(ACPI_BATTERY_COMPONENT),
50         ACPI_DEBUG_INIT(ACPI_BUTTON_COMPONENT),
51         ACPI_DEBUG_INIT(ACPI_SBS_COMPONENT),
52         ACPI_DEBUG_INIT(ACPI_FAN_COMPONENT),
53         ACPI_DEBUG_INIT(ACPI_PCI_COMPONENT),
54         ACPI_DEBUG_INIT(ACPI_POWER_COMPONENT),
55         ACPI_DEBUG_INIT(ACPI_CONTAINER_COMPONENT),
56         ACPI_DEBUG_INIT(ACPI_SYSTEM_COMPONENT),
57         ACPI_DEBUG_INIT(ACPI_THERMAL_COMPONENT),
58         ACPI_DEBUG_INIT(ACPI_MEMORY_DEVICE_COMPONENT),
59         ACPI_DEBUG_INIT(ACPI_VIDEO_COMPONENT),
60         ACPI_DEBUG_INIT(ACPI_PROCESSOR_COMPONENT),
61 };
62
63 static const struct acpi_dlevel acpi_debug_levels[] = {
64         ACPI_DEBUG_INIT(ACPI_LV_INIT),
65         ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT),
66         ACPI_DEBUG_INIT(ACPI_LV_INFO),
67
68         ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES),
69         ACPI_DEBUG_INIT(ACPI_LV_PARSE),
70         ACPI_DEBUG_INIT(ACPI_LV_LOAD),
71         ACPI_DEBUG_INIT(ACPI_LV_DISPATCH),
72         ACPI_DEBUG_INIT(ACPI_LV_EXEC),
73         ACPI_DEBUG_INIT(ACPI_LV_NAMES),
74         ACPI_DEBUG_INIT(ACPI_LV_OPREGION),
75         ACPI_DEBUG_INIT(ACPI_LV_BFIELD),
76         ACPI_DEBUG_INIT(ACPI_LV_TABLES),
77         ACPI_DEBUG_INIT(ACPI_LV_VALUES),
78         ACPI_DEBUG_INIT(ACPI_LV_OBJECTS),
79         ACPI_DEBUG_INIT(ACPI_LV_RESOURCES),
80         ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS),
81         ACPI_DEBUG_INIT(ACPI_LV_PACKAGE),
82
83         ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS),
84         ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS),
85         ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS),
86
87         ACPI_DEBUG_INIT(ACPI_LV_MUTEX),
88         ACPI_DEBUG_INIT(ACPI_LV_THREADS),
89         ACPI_DEBUG_INIT(ACPI_LV_IO),
90         ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS),
91
92         ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE),
93         ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO),
94         ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES),
95         ACPI_DEBUG_INIT(ACPI_LV_EVENTS),
96 };
97
98 /* --------------------------------------------------------------------------
99                               FS Interface (/sys)
100    -------------------------------------------------------------------------- */
101 static int param_get_debug_layer(char *buffer, struct kernel_param *kp) {
102         int result = 0;
103         int i;
104
105         result = sprintf(buffer, "%-25s\tHex        SET\n", "Description");
106
107         for(i = 0; i <ARRAY_SIZE(acpi_debug_layers); i++) {
108                 result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n",
109                                         acpi_debug_layers[i].name,
110                                         acpi_debug_layers[i].value,
111                                         (acpi_dbg_layer & acpi_debug_layers[i].value) ? '*' : ' ');
112         }
113         result += sprintf(buffer+result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
114                                         ACPI_ALL_DRIVERS,
115                                         (acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
116                                         ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
117                                         ACPI_ALL_DRIVERS) == 0 ? ' ' : '-');
118         result += sprintf(buffer+result, "--\ndebug_layer = 0x%08X ( * = enabled)\n", acpi_dbg_layer);
119
120         return result;
121 }
122
123 static int param_get_debug_level(char *buffer, struct kernel_param *kp) {
124         int result = 0;
125         int i;
126
127         result = sprintf(buffer, "%-25s\tHex        SET\n", "Description");
128
129         for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
130                 result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n",
131                                      acpi_debug_levels[i].name,
132                                      acpi_debug_levels[i].value,
133                                      (acpi_dbg_level & acpi_debug_levels[i].
134                                       value) ? '*' : ' ');
135         }
136         result += sprintf(buffer+result, "--\ndebug_level = 0x%08X (* = enabled)\n",
137                              acpi_dbg_level);
138
139         return result;
140 }
141
142 module_param_call(debug_layer, param_set_uint, param_get_debug_layer, &acpi_dbg_layer, 0644);
143 module_param_call(debug_level, param_set_uint, param_get_debug_level, &acpi_dbg_level, 0644);
144
145 static char trace_method_name[6];
146 module_param_string(trace_method_name, trace_method_name, 6, 0644);
147 static unsigned int trace_debug_layer;
148 module_param(trace_debug_layer, uint, 0644);
149 static unsigned int trace_debug_level;
150 module_param(trace_debug_level, uint, 0644);
151
152 static int param_set_trace_state(const char *val, struct kernel_param *kp)
153 {
154         int result = 0;
155
156         if (!strncmp(val, "enable", strlen("enable") - 1)) {
157                 result = acpi_debug_trace(trace_method_name, trace_debug_level,
158                                           trace_debug_layer, 0);
159                 if (result)
160                         result = -EBUSY;
161                 goto exit;
162         }
163
164         if (!strncmp(val, "disable", strlen("disable") - 1)) {
165                 int name = 0;
166                 result = acpi_debug_trace((char *)&name, trace_debug_level,
167                                           trace_debug_layer, 0);
168                 if (result)
169                         result = -EBUSY;
170                 goto exit;
171         }
172
173         if (!strncmp(val, "1", 1)) {
174                 result = acpi_debug_trace(trace_method_name, trace_debug_level,
175                                           trace_debug_layer, 1);
176                 if (result)
177                         result = -EBUSY;
178                 goto exit;
179         }
180
181         result = -EINVAL;
182 exit:
183         return result;
184 }
185
186 static int param_get_trace_state(char *buffer, struct kernel_param *kp)
187 {
188         if (!acpi_gbl_trace_method_name)
189                 return sprintf(buffer, "disable");
190         else {
191                 if (acpi_gbl_trace_flags & 1)
192                         return sprintf(buffer, "1");
193                 else
194                         return sprintf(buffer, "enable");
195         }
196         return 0;
197 }
198
199 module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
200                   NULL, 0644);
201
202 /* --------------------------------------------------------------------------
203                               FS Interface (/proc)
204    -------------------------------------------------------------------------- */
205 #ifdef CONFIG_ACPI_PROCFS
206 #define ACPI_SYSTEM_FILE_DEBUG_LAYER    "debug_layer"
207 #define ACPI_SYSTEM_FILE_DEBUG_LEVEL            "debug_level"
208
209 static int
210 acpi_system_read_debug(char *page,
211                        char **start, off_t off, int count, int *eof, void *data)
212 {
213         char *p = page;
214         int size = 0;
215         unsigned int i;
216
217         if (off != 0)
218                 goto end;
219
220         p += sprintf(p, "%-25s\tHex        SET\n", "Description");
221
222         switch ((unsigned long)data) {
223         case 0:
224                 for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
225                         p += sprintf(p, "%-25s\t0x%08lX [%c]\n",
226                                      acpi_debug_layers[i].name,
227                                      acpi_debug_layers[i].value,
228                                      (acpi_dbg_layer & acpi_debug_layers[i].
229                                       value) ? '*' : ' ');
230                 }
231                 p += sprintf(p, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
232                              ACPI_ALL_DRIVERS,
233                              (acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
234                              ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
235                                                        ACPI_ALL_DRIVERS) ==
236                              0 ? ' ' : '-');
237                 p += sprintf(p,
238                              "--\ndebug_layer = 0x%08X (* = enabled, - = partial)\n",
239                              acpi_dbg_layer);
240                 break;
241         case 1:
242                 for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
243                         p += sprintf(p, "%-25s\t0x%08lX [%c]\n",
244                                      acpi_debug_levels[i].name,
245                                      acpi_debug_levels[i].value,
246                                      (acpi_dbg_level & acpi_debug_levels[i].
247                                       value) ? '*' : ' ');
248                 }
249                 p += sprintf(p, "--\ndebug_level = 0x%08X (* = enabled)\n",
250                              acpi_dbg_level);
251                 break;
252         default:
253                 p += sprintf(p, "Invalid debug option\n");
254                 break;
255         }
256
257       end:
258         size = (p - page);
259         if (size <= off + count)
260                 *eof = 1;
261         *start = page + off;
262         size -= off;
263         if (size > count)
264                 size = count;
265         if (size < 0)
266                 size = 0;
267
268         return size;
269 }
270
271 static int
272 acpi_system_write_debug(struct file *file,
273                         const char __user * buffer,
274                         unsigned long count, void *data)
275 {
276         char debug_string[12] = { '\0' };
277
278
279         if (count > sizeof(debug_string) - 1)
280                 return -EINVAL;
281
282         if (copy_from_user(debug_string, buffer, count))
283                 return -EFAULT;
284
285         debug_string[count] = '\0';
286
287         switch ((unsigned long)data) {
288         case 0:
289                 acpi_dbg_layer = simple_strtoul(debug_string, NULL, 0);
290                 break;
291         case 1:
292                 acpi_dbg_level = simple_strtoul(debug_string, NULL, 0);
293                 break;
294         default:
295                 return -EINVAL;
296         }
297
298         return count;
299 }
300
301 static int __init acpi_debug_init(void)
302 {
303         struct proc_dir_entry *entry;
304         int error = 0;
305         char *name;
306
307
308         if (acpi_disabled)
309                 return 0;
310
311         /* 'debug_layer' [R/W] */
312         name = ACPI_SYSTEM_FILE_DEBUG_LAYER;
313         entry =
314             create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR,
315                                    acpi_root_dir, acpi_system_read_debug,
316                                    (void *)0);
317         if (entry)
318                 entry->write_proc = acpi_system_write_debug;
319         else
320                 goto Error;
321
322         /* 'debug_level' [R/W] */
323         name = ACPI_SYSTEM_FILE_DEBUG_LEVEL;
324         entry =
325             create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR,
326                                    acpi_root_dir, acpi_system_read_debug,
327                                    (void *)1);
328         if (entry)
329                 entry->write_proc = acpi_system_write_debug;
330         else
331                 goto Error;
332
333       Done:
334         return error;
335
336       Error:
337         remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir);
338         remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir);
339         error = -ENODEV;
340         goto Done;
341 }
342
343 subsys_initcall(acpi_debug_init);
344 #endif