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>
10 #include <asm/system.h>
11 #include <linux/dmi.h>
12 #include <linux/bootmem.h>
25 #define dmi_printk(x) printk x
30 static char * __init dmi_string(struct dmi_header *dm, u8 s)
47 * We have to be cautious here. We have seen BIOSes with DMI pointers
48 * pointing to completely the wrong place for example
51 static int __init dmi_table(u32 base, int len, int num, void (*decode)(struct dmi_header *))
54 struct dmi_header *dm;
58 buf = bt_ioremap(base, len);
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)
69 while(i<num && data-buf+sizeof(struct dmi_header)<=len)
71 dm=(struct dmi_header *)data;
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
78 while(data-buf<len-1 && (data[0] || data[1]))
90 inline static int __init dmi_checksum(u8 *buf)
100 static int __init dmi_iterate(void (*decode)(struct dmi_header *))
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.
110 p = ioremap(0xF0000, 0x10000);
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))
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];
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.
126 printk(KERN_INFO "DMI %d.%d present.\n",
127 buf[14]>>4, buf[14]&0x0F);
129 printk(KERN_INFO "DMI present.\n");
130 dmi_printk((KERN_INFO "%d structures occupying %d bytes.\n",
132 dmi_printk((KERN_INFO "DMI table at 0x%08X.\n",
134 if(dmi_table(base,len, num, decode)==0)
141 static char *dmi_ident[DMI_STRING_MAX];
147 static void __init dmi_save_ident(struct dmi_header *dm, int slot, int string)
150 char *p = dmi_string(dm, d[string]);
151 if(p==NULL || *p == 0)
155 dmi_ident[slot] = alloc_bootmem(strlen(p)+1);
157 strcpy(dmi_ident[slot], p);
159 printk(KERN_ERR "dmi_save_ident: out of memory.\n");
163 * Ugly compatibility crap.
165 #define dmi_blacklist dmi_system_id
166 #define NO_MATCH { DMI_NONE, NULL}
167 #define MATCH DMI_MATCH
170 * Toshiba keyboard likes to repeat keys when they are not repeated.
173 static __init int broken_toshiba_keyboard(struct dmi_blacklist *d)
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");
180 #ifdef CONFIG_ACPI_SLEEP
181 static __init int reset_videomode_after_s3(struct dmi_blacklist *d)
183 /* See acpi_wakeup.S */
184 extern long acpi_video_flags;
185 acpi_video_flags |= 2;
192 * Process the DMI blacklists
197 * This will be expanded over time to force things like the APM
198 * interrupt mask settings according to the laptop
201 static __initdata struct dmi_blacklist dmi_blacklist[]={
203 { broken_toshiba_keyboard, "Toshiba Satellite 4030cdt", { /* Keyboard generates spurious repeats */
204 MATCH(DMI_PRODUCT_NAME, "S4030CDT/4.3"),
205 NO_MATCH, NO_MATCH, NO_MATCH
207 #ifdef CONFIG_ACPI_SLEEP
208 { reset_videomode_after_s3, "Toshiba Satellite 4030cdt", { /* Reset video mode after returning from ACPI S3 sleep */
209 MATCH(DMI_PRODUCT_NAME, "S4030CDT/4.3"),
210 NO_MATCH, NO_MATCH, NO_MATCH
218 * Process a DMI table entry. Right now all we care about are the BIOS
219 * and machine entries. For 2.5 we should pull the smbus controller info
223 static void __init dmi_decode(struct dmi_header *dm)
232 dmi_printk(("BIOS Vendor: %s\n",
233 dmi_string(dm, data[4])));
234 dmi_save_ident(dm, DMI_BIOS_VENDOR, 4);
235 dmi_printk(("BIOS Version: %s\n",
236 dmi_string(dm, data[5])));
237 dmi_save_ident(dm, DMI_BIOS_VERSION, 5);
238 dmi_printk(("BIOS Release: %s\n",
239 dmi_string(dm, data[8])));
240 dmi_save_ident(dm, DMI_BIOS_DATE, 8);
243 dmi_printk(("System Vendor: %s\n",
244 dmi_string(dm, data[4])));
245 dmi_save_ident(dm, DMI_SYS_VENDOR, 4);
246 dmi_printk(("Product Name: %s\n",
247 dmi_string(dm, data[5])));
248 dmi_save_ident(dm, DMI_PRODUCT_NAME, 5);
249 dmi_printk(("Version: %s\n",
250 dmi_string(dm, data[6])));
251 dmi_save_ident(dm, DMI_PRODUCT_VERSION, 6);
252 dmi_printk(("Serial Number: %s\n",
253 dmi_string(dm, data[7])));
254 dmi_save_ident(dm, DMI_PRODUCT_SERIAL, 7);
257 dmi_printk(("Board Vendor: %s\n",
258 dmi_string(dm, data[4])));
259 dmi_save_ident(dm, DMI_BOARD_VENDOR, 4);
260 dmi_printk(("Board Name: %s\n",
261 dmi_string(dm, data[5])));
262 dmi_save_ident(dm, DMI_BOARD_NAME, 5);
263 dmi_printk(("Board Version: %s\n",
264 dmi_string(dm, data[6])));
265 dmi_save_ident(dm, DMI_BOARD_VERSION, 6);
270 void __init dmi_scan_machine(void)
272 int err = dmi_iterate(dmi_decode);
274 dmi_check_system(dmi_blacklist);
276 printk(KERN_INFO "DMI not present.\n");
281 * dmi_check_system - check system DMI data
282 * @list: array of dmi_system_id structures to match against
284 * Walk the blacklist table running matching functions until someone
285 * returns non zero or we hit the end. Callback function is called for
286 * each successfull match. Returns the number of matches.
288 int dmi_check_system(struct dmi_system_id *list)
291 struct dmi_system_id *d = list;
294 for (i = 0; i < ARRAY_SIZE(d->matches); i++) {
295 int s = d->matches[i].slot;
298 if (dmi_ident[s] && strstr(dmi_ident[s], d->matches[i].substr))
303 if (d->callback && d->callback(d))
311 EXPORT_SYMBOL(dmi_check_system);
314 * dmi_get_system_info - return DMI data value
315 * @field: data index (see enum dmi_filed)
317 * Returns one DMI data value, can be used to perform
318 * complex DMI data checks.
320 char *dmi_get_system_info(int field)
322 return dmi_ident[field];
324 EXPORT_SYMBOL(dmi_get_system_info);