Linux-2.6.12-rc2
[linux-2.6.git] / arch / i386 / kernel / dmi_scan.c
1 #include <linux/types.h>
2 #include <linux/kernel.h>
3 #include <linux/string.h>
4 #include <linux/init.h>
5 #include <linux/module.h>
6 #include <linux/slab.h>
7 #include <linux/acpi.h>
8 #include <asm/io.h>
9 #include <linux/pm.h>
10 #include <asm/system.h>
11 #include <linux/dmi.h>
12 #include <linux/bootmem.h>
13
14
15 struct dmi_header
16 {
17         u8      type;
18         u8      length;
19         u16     handle;
20 };
21
22 #undef DMI_DEBUG
23
24 #ifdef DMI_DEBUG
25 #define dmi_printk(x) printk x
26 #else
27 #define dmi_printk(x)
28 #endif
29
30 static char * __init dmi_string(struct dmi_header *dm, u8 s)
31 {
32         u8 *bp=(u8 *)dm;
33         bp+=dm->length;
34         if(!s)
35                 return "";
36         s--;
37         while(s>0 && *bp)
38         {
39                 bp+=strlen(bp);
40                 bp++;
41                 s--;
42         }
43         return bp;
44 }
45
46 /*
47  *      We have to be cautious here. We have seen BIOSes with DMI pointers
48  *      pointing to completely the wrong place for example
49  */
50  
51 static int __init dmi_table(u32 base, int len, int num, void (*decode)(struct dmi_header *))
52 {
53         u8 *buf;
54         struct dmi_header *dm;
55         u8 *data;
56         int i=0;
57                 
58         buf = bt_ioremap(base, len);
59         if(buf==NULL)
60                 return -1;
61
62         data = buf;
63
64         /*
65          *      Stop when we see all the items the table claimed to have
66          *      OR we run off the end of the table (also happens)
67          */
68  
69         while(i<num && data-buf+sizeof(struct dmi_header)<=len)
70         {
71                 dm=(struct dmi_header *)data;
72                 /*
73                  *  We want to know the total length (formated area and strings)
74                  *  before decoding to make sure we won't run off the table in
75                  *  dmi_decode or dmi_string
76                  */
77                 data+=dm->length;
78                 while(data-buf<len-1 && (data[0] || data[1]))
79                         data++;
80                 if(data-buf<len-1)
81                         decode(dm);
82                 data+=2;
83                 i++;
84         }
85         bt_iounmap(buf, len);
86         return 0;
87 }
88
89
90 inline static int __init dmi_checksum(u8 *buf)
91 {
92         u8 sum=0;
93         int a;
94         
95         for(a=0; a<15; a++)
96                 sum+=buf[a];
97         return (sum==0);
98 }
99
100 static int __init dmi_iterate(void (*decode)(struct dmi_header *))
101 {
102         u8 buf[15];
103         char __iomem *p, *q;
104
105         /*
106          * no iounmap() for that ioremap(); it would be a no-op, but it's
107          * so early in setup that sucker gets confused into doing what
108          * it shouldn't if we actually call it.
109          */
110         p = ioremap(0xF0000, 0x10000);
111         if (p == NULL)
112                 return -1;
113         for (q = p; q < p + 0x10000; q += 16) {
114                 memcpy_fromio(buf, q, 15);
115                 if(memcmp(buf, "_DMI_", 5)==0 && dmi_checksum(buf))
116                 {
117                         u16 num=buf[13]<<8|buf[12];
118                         u16 len=buf[7]<<8|buf[6];
119                         u32 base=buf[11]<<24|buf[10]<<16|buf[9]<<8|buf[8];
120
121                         /*
122                          * DMI version 0.0 means that the real version is taken from
123                          * the SMBIOS version, which we don't know at this point.
124                          */
125                         if(buf[14]!=0)
126                                 printk(KERN_INFO "DMI %d.%d present.\n",
127                                         buf[14]>>4, buf[14]&0x0F);
128                         else
129                                 printk(KERN_INFO "DMI present.\n");
130                         dmi_printk((KERN_INFO "%d structures occupying %d bytes.\n",
131                                 num, len));
132                         dmi_printk((KERN_INFO "DMI table at 0x%08X.\n",
133                                 base));
134                         if(dmi_table(base,len, num, decode)==0)
135                                 return 0;
136                 }
137         }
138         return -1;
139 }
140
141 static char *dmi_ident[DMI_STRING_MAX];
142
143 /*
144  *      Save a DMI string
145  */
146  
147 static void __init dmi_save_ident(struct dmi_header *dm, int slot, int string)
148 {
149         char *d = (char*)dm;
150         char *p = dmi_string(dm, d[string]);
151         if(p==NULL || *p == 0)
152                 return;
153         if (dmi_ident[slot])
154                 return;
155         dmi_ident[slot] = alloc_bootmem(strlen(p)+1);
156         if(dmi_ident[slot])
157                 strcpy(dmi_ident[slot], p);
158         else
159                 printk(KERN_ERR "dmi_save_ident: out of memory.\n");
160 }
161
162 /*
163  * Ugly compatibility crap.
164  */
165 #define dmi_blacklist   dmi_system_id
166 #define NO_MATCH        { DMI_NONE, NULL}
167 #define MATCH           DMI_MATCH
168
169 /*
170  * Toshiba keyboard likes to repeat keys when they are not repeated.
171  */
172
173 static __init int broken_toshiba_keyboard(struct dmi_blacklist *d)
174 {
175         printk(KERN_WARNING "Toshiba with broken keyboard detected. If your keyboard sometimes generates 3 keypresses instead of one, see http://davyd.ucc.asn.au/projects/toshiba/README\n");
176         return 0;
177 }
178
179
180 #ifdef CONFIG_ACPI_SLEEP
181 static __init int reset_videomode_after_s3(struct dmi_blacklist *d)
182 {
183         /* See acpi_wakeup.S */
184         extern long acpi_video_flags;
185         acpi_video_flags |= 2;
186         return 0;
187 }
188 #endif
189
190
191 #ifdef  CONFIG_ACPI_BOOT
192 extern int acpi_force;
193
194 static __init __attribute__((unused)) int dmi_disable_acpi(struct dmi_blacklist *d) 
195
196         if (!acpi_force) { 
197                 printk(KERN_NOTICE "%s detected: acpi off\n",d->ident); 
198                 disable_acpi();
199         } else { 
200                 printk(KERN_NOTICE 
201                        "Warning: DMI blacklist says broken, but acpi forced\n"); 
202         }
203         return 0;
204
205
206 /*
207  * Limit ACPI to CPU enumeration for HT
208  */
209 static __init __attribute__((unused)) int force_acpi_ht(struct dmi_blacklist *d) 
210
211         if (!acpi_force) { 
212                 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n", d->ident); 
213                 disable_acpi();
214                 acpi_ht = 1; 
215         } else { 
216                 printk(KERN_NOTICE 
217                        "Warning: acpi=force overrules DMI blacklist: acpi=ht\n"); 
218         }
219         return 0;
220
221 #endif
222
223 #ifdef  CONFIG_ACPI_PCI
224 static __init int disable_acpi_irq(struct dmi_blacklist *d) 
225 {
226         if (!acpi_force) {
227                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
228                        d->ident);       
229                 acpi_noirq_set();
230         }
231         return 0;
232 }
233 static __init int disable_acpi_pci(struct dmi_blacklist *d) 
234 {
235         if (!acpi_force) {
236                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
237                        d->ident);       
238                 acpi_disable_pci();
239         }
240         return 0;
241 }  
242 #endif
243
244 /*
245  *      Process the DMI blacklists
246  */
247  
248
249 /*
250  *      This will be expanded over time to force things like the APM 
251  *      interrupt mask settings according to the laptop
252  */
253  
254 static __initdata struct dmi_blacklist dmi_blacklist[]={
255
256         { broken_toshiba_keyboard, "Toshiba Satellite 4030cdt", { /* Keyboard generates spurious repeats */
257                         MATCH(DMI_PRODUCT_NAME, "S4030CDT/4.3"),
258                         NO_MATCH, NO_MATCH, NO_MATCH
259                         } },
260 #ifdef CONFIG_ACPI_SLEEP
261         { reset_videomode_after_s3, "Toshiba Satellite 4030cdt", { /* Reset video mode after returning from ACPI S3 sleep */
262                         MATCH(DMI_PRODUCT_NAME, "S4030CDT/4.3"),
263                         NO_MATCH, NO_MATCH, NO_MATCH
264                         } },
265 #endif
266
267 #ifdef  CONFIG_ACPI_BOOT
268         /*
269          * If your system is blacklisted here, but you find that acpi=force
270          * works for you, please contact acpi-devel@sourceforge.net
271          */
272
273         /*
274          *      Boxes that need ACPI disabled
275          */
276
277         { dmi_disable_acpi, "IBM Thinkpad", {
278                         MATCH(DMI_BOARD_VENDOR, "IBM"),
279                         MATCH(DMI_BOARD_NAME, "2629H1G"),
280                         NO_MATCH, NO_MATCH }},
281
282         /*
283          *      Boxes that need acpi=ht 
284          */
285
286         { force_acpi_ht, "FSC Primergy T850", {
287                         MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
288                         MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
289                         NO_MATCH, NO_MATCH }},
290
291         { force_acpi_ht, "DELL GX240", {
292                         MATCH(DMI_BOARD_VENDOR, "Dell Computer Corporation"),
293                         MATCH(DMI_BOARD_NAME, "OptiPlex GX240"),
294                         NO_MATCH, NO_MATCH }},
295
296         { force_acpi_ht, "HP VISUALIZE NT Workstation", {
297                         MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
298                         MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
299                         NO_MATCH, NO_MATCH }},
300
301         { force_acpi_ht, "Compaq Workstation W8000", {
302                         MATCH(DMI_SYS_VENDOR, "Compaq"),
303                         MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
304                         NO_MATCH, NO_MATCH }},
305
306         { force_acpi_ht, "ASUS P4B266", {
307                         MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
308                         MATCH(DMI_BOARD_NAME, "P4B266"),
309                         NO_MATCH, NO_MATCH }},
310
311         { force_acpi_ht, "ASUS P2B-DS", {
312                         MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
313                         MATCH(DMI_BOARD_NAME, "P2B-DS"),
314                         NO_MATCH, NO_MATCH }},
315
316         { force_acpi_ht, "ASUS CUR-DLS", {
317                         MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
318                         MATCH(DMI_BOARD_NAME, "CUR-DLS"),
319                         NO_MATCH, NO_MATCH }},
320
321         { force_acpi_ht, "ABIT i440BX-W83977", {
322                         MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
323                         MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
324                         NO_MATCH, NO_MATCH }},
325
326         { force_acpi_ht, "IBM Bladecenter", {
327                         MATCH(DMI_BOARD_VENDOR, "IBM"),
328                         MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
329                         NO_MATCH, NO_MATCH }},
330
331         { force_acpi_ht, "IBM eServer xSeries 360", {
332                         MATCH(DMI_BOARD_VENDOR, "IBM"),
333                         MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
334                         NO_MATCH, NO_MATCH }},
335
336         { force_acpi_ht, "IBM eserver xSeries 330", {
337                         MATCH(DMI_BOARD_VENDOR, "IBM"),
338                         MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
339                         NO_MATCH, NO_MATCH }},
340
341         { force_acpi_ht, "IBM eserver xSeries 440", {
342                         MATCH(DMI_BOARD_VENDOR, "IBM"),
343                         MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
344                         NO_MATCH, NO_MATCH }},
345
346 #endif  // CONFIG_ACPI_BOOT
347
348 #ifdef  CONFIG_ACPI_PCI
349         /*
350          *      Boxes that need ACPI PCI IRQ routing disabled
351          */
352
353         { disable_acpi_irq, "ASUS A7V", {
354                         MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
355                         MATCH(DMI_BOARD_NAME, "<A7V>"),
356                         /* newer BIOS, Revision 1011, does work */
357                         MATCH(DMI_BIOS_VERSION, "ASUS A7V ACPI BIOS Revision 1007"),
358                         NO_MATCH }},
359
360         /*
361          *      Boxes that need ACPI PCI IRQ routing and PCI scan disabled
362          */
363         { disable_acpi_pci, "ASUS PR-DLS", {    /* _BBN 0 bug */
364                         MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
365                         MATCH(DMI_BOARD_NAME, "PR-DLS"),
366                         MATCH(DMI_BIOS_VERSION, "ASUS PR-DLS ACPI BIOS Revision 1010"),
367                         MATCH(DMI_BIOS_DATE, "03/21/2003") }},
368
369         { disable_acpi_pci, "Acer TravelMate 36x Laptop", {
370                         MATCH(DMI_SYS_VENDOR, "Acer"),
371                         MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
372                         NO_MATCH, NO_MATCH
373                         } },
374
375 #endif
376
377         { NULL, }
378 };
379
380 /*
381  *      Process a DMI table entry. Right now all we care about are the BIOS
382  *      and machine entries. For 2.5 we should pull the smbus controller info
383  *      out of here.
384  */
385
386 static void __init dmi_decode(struct dmi_header *dm)
387 {
388 #ifdef DMI_DEBUG
389         u8 *data = (u8 *)dm;
390 #endif
391         
392         switch(dm->type)
393         {
394                 case  0:
395                         dmi_printk(("BIOS Vendor: %s\n",
396                                 dmi_string(dm, data[4])));
397                         dmi_save_ident(dm, DMI_BIOS_VENDOR, 4);
398                         dmi_printk(("BIOS Version: %s\n", 
399                                 dmi_string(dm, data[5])));
400                         dmi_save_ident(dm, DMI_BIOS_VERSION, 5);
401                         dmi_printk(("BIOS Release: %s\n",
402                                 dmi_string(dm, data[8])));
403                         dmi_save_ident(dm, DMI_BIOS_DATE, 8);
404                         break;
405                 case 1:
406                         dmi_printk(("System Vendor: %s\n",
407                                 dmi_string(dm, data[4])));
408                         dmi_save_ident(dm, DMI_SYS_VENDOR, 4);
409                         dmi_printk(("Product Name: %s\n",
410                                 dmi_string(dm, data[5])));
411                         dmi_save_ident(dm, DMI_PRODUCT_NAME, 5);
412                         dmi_printk(("Version: %s\n",
413                                 dmi_string(dm, data[6])));
414                         dmi_save_ident(dm, DMI_PRODUCT_VERSION, 6);
415                         dmi_printk(("Serial Number: %s\n",
416                                 dmi_string(dm, data[7])));
417                         break;
418                 case 2:
419                         dmi_printk(("Board Vendor: %s\n",
420                                 dmi_string(dm, data[4])));
421                         dmi_save_ident(dm, DMI_BOARD_VENDOR, 4);
422                         dmi_printk(("Board Name: %s\n",
423                                 dmi_string(dm, data[5])));
424                         dmi_save_ident(dm, DMI_BOARD_NAME, 5);
425                         dmi_printk(("Board Version: %s\n",
426                                 dmi_string(dm, data[6])));
427                         dmi_save_ident(dm, DMI_BOARD_VERSION, 6);
428                         break;
429         }
430 }
431
432 void __init dmi_scan_machine(void)
433 {
434         int err = dmi_iterate(dmi_decode);
435         if(err == 0)
436                 dmi_check_system(dmi_blacklist);
437         else
438                 printk(KERN_INFO "DMI not present.\n");
439 }
440
441
442 /**
443  *      dmi_check_system - check system DMI data
444  *      @list: array of dmi_system_id structures to match against
445  *
446  *      Walk the blacklist table running matching functions until someone
447  *      returns non zero or we hit the end. Callback function is called for
448  *      each successfull match. Returns the number of matches.
449  */
450 int dmi_check_system(struct dmi_system_id *list)
451 {
452         int i, count = 0;
453         struct dmi_system_id *d = list;
454
455         while (d->ident) {
456                 for (i = 0; i < ARRAY_SIZE(d->matches); i++) {
457                         int s = d->matches[i].slot;
458                         if (s == DMI_NONE)
459                                 continue;
460                         if (dmi_ident[s] && strstr(dmi_ident[s], d->matches[i].substr))
461                                 continue;
462                         /* No match */
463                         goto fail;
464                 }
465                 if (d->callback && d->callback(d))
466                         break;
467                 count++;
468 fail:           d++;
469         }
470
471         return count;
472 }
473
474 EXPORT_SYMBOL(dmi_check_system);
475
476 /**
477  *      dmi_get_system_info - return DMI data value
478  *      @field: data index (see enum dmi_filed)
479  *
480  *      Returns one DMI data value, can be used to perform
481  *      complex DMI data checks.
482  */
483 char * dmi_get_system_info(int field)
484 {
485         return dmi_ident[field];
486 }
487