Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #include <linux/types.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | #include <linux/string.h> |
| 3 | #include <linux/init.h> |
| 4 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | #include <linux/dmi.h> |
Matt Domsch | 3ed3bce | 2006-03-26 01:37:03 -0800 | [diff] [blame] | 6 | #include <linux/efi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | #include <linux/bootmem.h> |
Andi Kleen | e992867 | 2006-01-11 22:43:33 +0100 | [diff] [blame] | 8 | #include <linux/slab.h> |
Andi Kleen | f2d3efe | 2006-03-25 16:30:22 +0100 | [diff] [blame] | 9 | #include <asm/dmi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | static char * __init dmi_string(struct dmi_header *dm, u8 s) |
| 12 | { |
Andrey Panin | 1249c51 | 2005-06-25 14:54:47 -0700 | [diff] [blame] | 13 | u8 *bp = ((u8 *) dm) + dm->length; |
Andrey Panin | c3c7120 | 2005-09-06 15:18:28 -0700 | [diff] [blame] | 14 | char *str = ""; |
Andrey Panin | 1249c51 | 2005-06-25 14:54:47 -0700 | [diff] [blame] | 15 | |
Andrey Panin | c3c7120 | 2005-09-06 15:18:28 -0700 | [diff] [blame] | 16 | if (s) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | s--; |
Andrey Panin | c3c7120 | 2005-09-06 15:18:28 -0700 | [diff] [blame] | 18 | while (s > 0 && *bp) { |
| 19 | bp += strlen(bp) + 1; |
| 20 | s--; |
| 21 | } |
| 22 | |
| 23 | if (*bp != 0) { |
Andi Kleen | e992867 | 2006-01-11 22:43:33 +0100 | [diff] [blame] | 24 | str = dmi_alloc(strlen(bp) + 1); |
Andrey Panin | c3c7120 | 2005-09-06 15:18:28 -0700 | [diff] [blame] | 25 | if (str != NULL) |
| 26 | strcpy(str, bp); |
| 27 | else |
| 28 | printk(KERN_ERR "dmi_string: out of memory.\n"); |
| 29 | } |
Bjorn Helgaas | 4f705ae | 2006-04-03 17:09:22 -0700 | [diff] [blame] | 30 | } |
Andrey Panin | c3c7120 | 2005-09-06 15:18:28 -0700 | [diff] [blame] | 31 | |
| 32 | return str; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | } |
| 34 | |
| 35 | /* |
| 36 | * We have to be cautious here. We have seen BIOSes with DMI pointers |
| 37 | * pointing to completely the wrong place for example |
| 38 | */ |
Andrey Panin | 1249c51 | 2005-06-25 14:54:47 -0700 | [diff] [blame] | 39 | static int __init dmi_table(u32 base, int len, int num, |
| 40 | void (*decode)(struct dmi_header *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | { |
Andrey Panin | 1249c51 | 2005-06-25 14:54:47 -0700 | [diff] [blame] | 42 | u8 *buf, *data; |
| 43 | int i = 0; |
Bjorn Helgaas | 4f705ae | 2006-04-03 17:09:22 -0700 | [diff] [blame] | 44 | |
Andi Kleen | e992867 | 2006-01-11 22:43:33 +0100 | [diff] [blame] | 45 | buf = dmi_ioremap(base, len); |
Andrey Panin | 1249c51 | 2005-06-25 14:54:47 -0700 | [diff] [blame] | 46 | if (buf == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | return -1; |
| 48 | |
| 49 | data = buf; |
| 50 | |
| 51 | /* |
Bjorn Helgaas | 4f705ae | 2006-04-03 17:09:22 -0700 | [diff] [blame] | 52 | * Stop when we see all the items the table claimed to have |
| 53 | * OR we run off the end of the table (also happens) |
| 54 | */ |
Andrey Panin | 1249c51 | 2005-06-25 14:54:47 -0700 | [diff] [blame] | 55 | while ((i < num) && (data - buf + sizeof(struct dmi_header)) <= len) { |
| 56 | struct dmi_header *dm = (struct dmi_header *)data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | /* |
| 58 | * We want to know the total length (formated area and strings) |
| 59 | * before decoding to make sure we won't run off the table in |
| 60 | * dmi_decode or dmi_string |
| 61 | */ |
Andrey Panin | 1249c51 | 2005-06-25 14:54:47 -0700 | [diff] [blame] | 62 | data += dm->length; |
| 63 | while ((data - buf < len - 1) && (data[0] || data[1])) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | data++; |
Andrey Panin | 1249c51 | 2005-06-25 14:54:47 -0700 | [diff] [blame] | 65 | if (data - buf < len - 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | decode(dm); |
Andrey Panin | 1249c51 | 2005-06-25 14:54:47 -0700 | [diff] [blame] | 67 | data += 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | i++; |
| 69 | } |
Andi Kleen | e992867 | 2006-01-11 22:43:33 +0100 | [diff] [blame] | 70 | dmi_iounmap(buf, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | return 0; |
| 72 | } |
| 73 | |
Andrey Panin | 1249c51 | 2005-06-25 14:54:47 -0700 | [diff] [blame] | 74 | static int __init dmi_checksum(u8 *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | { |
Andrey Panin | 1249c51 | 2005-06-25 14:54:47 -0700 | [diff] [blame] | 76 | u8 sum = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | int a; |
Bjorn Helgaas | 4f705ae | 2006-04-03 17:09:22 -0700 | [diff] [blame] | 78 | |
Andrey Panin | 1249c51 | 2005-06-25 14:54:47 -0700 | [diff] [blame] | 79 | for (a = 0; a < 15; a++) |
| 80 | sum += buf[a]; |
| 81 | |
| 82 | return sum == 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | } |
| 84 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | static char *dmi_ident[DMI_STRING_MAX]; |
Andrey Panin | ebad6a4 | 2005-09-06 15:18:29 -0700 | [diff] [blame] | 86 | static LIST_HEAD(dmi_devices); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | |
| 88 | /* |
| 89 | * Save a DMI string |
| 90 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | static void __init dmi_save_ident(struct dmi_header *dm, int slot, int string) |
| 92 | { |
Andrey Panin | c3c7120 | 2005-09-06 15:18:28 -0700 | [diff] [blame] | 93 | char *p, *d = (char*) dm; |
Andrey Panin | 1249c51 | 2005-06-25 14:54:47 -0700 | [diff] [blame] | 94 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | if (dmi_ident[slot]) |
| 96 | return; |
Andrey Panin | 1249c51 | 2005-06-25 14:54:47 -0700 | [diff] [blame] | 97 | |
Andrey Panin | c3c7120 | 2005-09-06 15:18:28 -0700 | [diff] [blame] | 98 | p = dmi_string(dm, d[string]); |
| 99 | if (p == NULL) |
| 100 | return; |
| 101 | |
| 102 | dmi_ident[slot] = p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | } |
| 104 | |
Andrey Panin | ebad6a4 | 2005-09-06 15:18:29 -0700 | [diff] [blame] | 105 | static void __init dmi_save_devices(struct dmi_header *dm) |
| 106 | { |
| 107 | int i, count = (dm->length - sizeof(struct dmi_header)) / 2; |
| 108 | struct dmi_device *dev; |
| 109 | |
| 110 | for (i = 0; i < count; i++) { |
Andrey Panin | bc83455 | 2006-03-25 03:06:31 -0800 | [diff] [blame] | 111 | char *d = (char *)(dm + 1) + (i * 2); |
Andrey Panin | ebad6a4 | 2005-09-06 15:18:29 -0700 | [diff] [blame] | 112 | |
| 113 | /* Skip disabled device */ |
| 114 | if ((*d & 0x80) == 0) |
| 115 | continue; |
| 116 | |
Andi Kleen | e992867 | 2006-01-11 22:43:33 +0100 | [diff] [blame] | 117 | dev = dmi_alloc(sizeof(*dev)); |
Andrey Panin | ebad6a4 | 2005-09-06 15:18:29 -0700 | [diff] [blame] | 118 | if (!dev) { |
| 119 | printk(KERN_ERR "dmi_save_devices: out of memory.\n"); |
| 120 | break; |
| 121 | } |
| 122 | |
| 123 | dev->type = *d++ & 0x7f; |
| 124 | dev->name = dmi_string(dm, *d); |
| 125 | dev->device_data = NULL; |
| 126 | |
| 127 | list_add(&dev->list, &dmi_devices); |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | static void __init dmi_save_ipmi_device(struct dmi_header *dm) |
| 132 | { |
| 133 | struct dmi_device *dev; |
| 134 | void * data; |
| 135 | |
Andi Kleen | e992867 | 2006-01-11 22:43:33 +0100 | [diff] [blame] | 136 | data = dmi_alloc(dm->length); |
Andrey Panin | ebad6a4 | 2005-09-06 15:18:29 -0700 | [diff] [blame] | 137 | if (data == NULL) { |
| 138 | printk(KERN_ERR "dmi_save_ipmi_device: out of memory.\n"); |
| 139 | return; |
| 140 | } |
| 141 | |
| 142 | memcpy(data, dm, dm->length); |
| 143 | |
Andi Kleen | e992867 | 2006-01-11 22:43:33 +0100 | [diff] [blame] | 144 | dev = dmi_alloc(sizeof(*dev)); |
Andrey Panin | ebad6a4 | 2005-09-06 15:18:29 -0700 | [diff] [blame] | 145 | if (!dev) { |
| 146 | printk(KERN_ERR "dmi_save_ipmi_device: out of memory.\n"); |
| 147 | return; |
| 148 | } |
| 149 | |
| 150 | dev->type = DMI_DEV_TYPE_IPMI; |
| 151 | dev->name = "IPMI controller"; |
| 152 | dev->device_data = data; |
| 153 | |
| 154 | list_add(&dev->list, &dmi_devices); |
| 155 | } |
| 156 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | * Process a DMI table entry. Right now all we care about are the BIOS |
| 159 | * and machine entries. For 2.5 we should pull the smbus controller info |
| 160 | * out of here. |
| 161 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | static void __init dmi_decode(struct dmi_header *dm) |
| 163 | { |
Andrey Panin | 1249c51 | 2005-06-25 14:54:47 -0700 | [diff] [blame] | 164 | switch(dm->type) { |
Andrey Panin | ebad6a4 | 2005-09-06 15:18:29 -0700 | [diff] [blame] | 165 | case 0: /* BIOS Information */ |
Andrey Panin | 1249c51 | 2005-06-25 14:54:47 -0700 | [diff] [blame] | 166 | dmi_save_ident(dm, DMI_BIOS_VENDOR, 4); |
Andrey Panin | 1249c51 | 2005-06-25 14:54:47 -0700 | [diff] [blame] | 167 | dmi_save_ident(dm, DMI_BIOS_VERSION, 5); |
Andrey Panin | 1249c51 | 2005-06-25 14:54:47 -0700 | [diff] [blame] | 168 | dmi_save_ident(dm, DMI_BIOS_DATE, 8); |
| 169 | break; |
Andrey Panin | ebad6a4 | 2005-09-06 15:18:29 -0700 | [diff] [blame] | 170 | case 1: /* System Information */ |
Andrey Panin | 1249c51 | 2005-06-25 14:54:47 -0700 | [diff] [blame] | 171 | dmi_save_ident(dm, DMI_SYS_VENDOR, 4); |
Andrey Panin | 1249c51 | 2005-06-25 14:54:47 -0700 | [diff] [blame] | 172 | dmi_save_ident(dm, DMI_PRODUCT_NAME, 5); |
Andrey Panin | 1249c51 | 2005-06-25 14:54:47 -0700 | [diff] [blame] | 173 | dmi_save_ident(dm, DMI_PRODUCT_VERSION, 6); |
Andrey Panin | 1249c51 | 2005-06-25 14:54:47 -0700 | [diff] [blame] | 174 | dmi_save_ident(dm, DMI_PRODUCT_SERIAL, 7); |
| 175 | break; |
Andrey Panin | ebad6a4 | 2005-09-06 15:18:29 -0700 | [diff] [blame] | 176 | case 2: /* Base Board Information */ |
Andrey Panin | 1249c51 | 2005-06-25 14:54:47 -0700 | [diff] [blame] | 177 | dmi_save_ident(dm, DMI_BOARD_VENDOR, 4); |
Andrey Panin | 1249c51 | 2005-06-25 14:54:47 -0700 | [diff] [blame] | 178 | dmi_save_ident(dm, DMI_BOARD_NAME, 5); |
Andrey Panin | 1249c51 | 2005-06-25 14:54:47 -0700 | [diff] [blame] | 179 | dmi_save_ident(dm, DMI_BOARD_VERSION, 6); |
| 180 | break; |
Andrey Panin | ebad6a4 | 2005-09-06 15:18:29 -0700 | [diff] [blame] | 181 | case 10: /* Onboard Devices Information */ |
| 182 | dmi_save_devices(dm); |
| 183 | break; |
| 184 | case 38: /* IPMI Device Information */ |
| 185 | dmi_save_ipmi_device(dm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | } |
| 187 | } |
| 188 | |
Matt Domsch | 3ed3bce | 2006-03-26 01:37:03 -0800 | [diff] [blame] | 189 | static int __init dmi_present(char __iomem *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | { |
Andrey Panin | 61e032fa | 2005-09-06 15:18:26 -0700 | [diff] [blame] | 191 | u8 buf[15]; |
Matt Domsch | 3ed3bce | 2006-03-26 01:37:03 -0800 | [diff] [blame] | 192 | memcpy_fromio(buf, p, 15); |
| 193 | if ((memcmp(buf, "_DMI_", 5) == 0) && dmi_checksum(buf)) { |
| 194 | u16 num = (buf[13] << 8) | buf[12]; |
| 195 | u16 len = (buf[7] << 8) | buf[6]; |
| 196 | u32 base = (buf[11] << 24) | (buf[10] << 16) | |
| 197 | (buf[9] << 8) | buf[8]; |
| 198 | |
| 199 | /* |
| 200 | * DMI version 0.0 means that the real version is taken from |
| 201 | * the SMBIOS version, which we don't know at this point. |
| 202 | */ |
| 203 | if (buf[14] != 0) |
| 204 | printk(KERN_INFO "DMI %d.%d present.\n", |
| 205 | buf[14] >> 4, buf[14] & 0xF); |
| 206 | else |
| 207 | printk(KERN_INFO "DMI present.\n"); |
| 208 | if (dmi_table(base,len, num, dmi_decode) == 0) |
| 209 | return 0; |
| 210 | } |
| 211 | return 1; |
| 212 | } |
| 213 | |
| 214 | void __init dmi_scan_machine(void) |
| 215 | { |
Andrey Panin | 61e032fa | 2005-09-06 15:18:26 -0700 | [diff] [blame] | 216 | char __iomem *p, *q; |
Matt Domsch | 3ed3bce | 2006-03-26 01:37:03 -0800 | [diff] [blame] | 217 | int rc; |
Andrey Panin | 61e032fa | 2005-09-06 15:18:26 -0700 | [diff] [blame] | 218 | |
Matt Domsch | 3ed3bce | 2006-03-26 01:37:03 -0800 | [diff] [blame] | 219 | if (efi_enabled) { |
Bjorn Helgaas | b2c99e3 | 2006-03-26 01:37:08 -0800 | [diff] [blame] | 220 | if (efi.smbios == EFI_INVALID_TABLE_ADDR) |
Matt Domsch | 3ed3bce | 2006-03-26 01:37:03 -0800 | [diff] [blame] | 221 | goto out; |
Andrey Panin | 61e032fa | 2005-09-06 15:18:26 -0700 | [diff] [blame] | 222 | |
Matt Domsch | 3ed3bce | 2006-03-26 01:37:03 -0800 | [diff] [blame] | 223 | /* This is called as a core_initcall() because it isn't |
| 224 | * needed during early boot. This also means we can |
| 225 | * iounmap the space when we're done with it. |
| 226 | */ |
Bjorn Helgaas | b2c99e3 | 2006-03-26 01:37:08 -0800 | [diff] [blame] | 227 | p = dmi_ioremap(efi.smbios, 32); |
Matt Domsch | 3ed3bce | 2006-03-26 01:37:03 -0800 | [diff] [blame] | 228 | if (p == NULL) |
| 229 | goto out; |
Andrey Panin | 61e032fa | 2005-09-06 15:18:26 -0700 | [diff] [blame] | 230 | |
Matt Domsch | 3ed3bce | 2006-03-26 01:37:03 -0800 | [diff] [blame] | 231 | rc = dmi_present(p + 0x10); /* offset of _DMI_ string */ |
Tolentino, Matthew E | 23dd842 | 2006-03-26 01:37:09 -0800 | [diff] [blame] | 232 | dmi_iounmap(p, 32); |
Matt Domsch | 3ed3bce | 2006-03-26 01:37:03 -0800 | [diff] [blame] | 233 | if (!rc) |
| 234 | return; |
| 235 | } |
| 236 | else { |
| 237 | /* |
| 238 | * no iounmap() for that ioremap(); it would be a no-op, but |
| 239 | * it's so early in setup that sucker gets confused into doing |
| 240 | * what it shouldn't if we actually call it. |
| 241 | */ |
| 242 | p = dmi_ioremap(0xF0000, 0x10000); |
| 243 | if (p == NULL) |
| 244 | goto out; |
Andrey Panin | 61e032fa | 2005-09-06 15:18:26 -0700 | [diff] [blame] | 245 | |
Matt Domsch | 3ed3bce | 2006-03-26 01:37:03 -0800 | [diff] [blame] | 246 | for (q = p; q < p + 0x10000; q += 16) { |
| 247 | rc = dmi_present(q); |
| 248 | if (!rc) |
Andrey Panin | 61e032fa | 2005-09-06 15:18:26 -0700 | [diff] [blame] | 249 | return; |
| 250 | } |
| 251 | } |
Matt Domsch | 3ed3bce | 2006-03-26 01:37:03 -0800 | [diff] [blame] | 252 | out: printk(KERN_INFO "DMI not present or invalid.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | } |
| 254 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | /** |
| 256 | * dmi_check_system - check system DMI data |
| 257 | * @list: array of dmi_system_id structures to match against |
Randy Dunlap | b0ef371 | 2006-06-25 05:49:18 -0700 | [diff] [blame] | 258 | * All non-null elements of the list must match |
| 259 | * their slot's (field index's) data (i.e., each |
| 260 | * list string must be a substring of the specified |
| 261 | * DMI slot's string data) to be considered a |
| 262 | * successful match. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | * |
| 264 | * Walk the blacklist table running matching functions until someone |
| 265 | * returns non zero or we hit the end. Callback function is called for |
Randy Dunlap | b0ef371 | 2006-06-25 05:49:18 -0700 | [diff] [blame] | 266 | * each successful match. Returns the number of matches. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | */ |
| 268 | int dmi_check_system(struct dmi_system_id *list) |
| 269 | { |
| 270 | int i, count = 0; |
| 271 | struct dmi_system_id *d = list; |
| 272 | |
| 273 | while (d->ident) { |
| 274 | for (i = 0; i < ARRAY_SIZE(d->matches); i++) { |
| 275 | int s = d->matches[i].slot; |
| 276 | if (s == DMI_NONE) |
| 277 | continue; |
| 278 | if (dmi_ident[s] && strstr(dmi_ident[s], d->matches[i].substr)) |
| 279 | continue; |
| 280 | /* No match */ |
| 281 | goto fail; |
| 282 | } |
Robert Love | 640e803 | 2005-09-06 15:18:30 -0700 | [diff] [blame] | 283 | count++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | if (d->callback && d->callback(d)) |
| 285 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | fail: d++; |
| 287 | } |
| 288 | |
| 289 | return count; |
| 290 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | EXPORT_SYMBOL(dmi_check_system); |
| 292 | |
| 293 | /** |
| 294 | * dmi_get_system_info - return DMI data value |
Randy Dunlap | b0ef371 | 2006-06-25 05:49:18 -0700 | [diff] [blame] | 295 | * @field: data index (see enum dmi_field) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | * |
| 297 | * Returns one DMI data value, can be used to perform |
| 298 | * complex DMI data checks. |
| 299 | */ |
Dmitry Torokhov | e70c9d5 | 2005-06-25 14:54:25 -0700 | [diff] [blame] | 300 | char *dmi_get_system_info(int field) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | { |
| 302 | return dmi_ident[field]; |
| 303 | } |
Dmitry Torokhov | e70c9d5 | 2005-06-25 14:54:25 -0700 | [diff] [blame] | 304 | EXPORT_SYMBOL(dmi_get_system_info); |
Andrey Panin | ebad6a4 | 2005-09-06 15:18:29 -0700 | [diff] [blame] | 305 | |
| 306 | /** |
| 307 | * dmi_find_device - find onboard device by type/name |
| 308 | * @type: device type or %DMI_DEV_TYPE_ANY to match all device types |
Randy Dunlap | b0ef371 | 2006-06-25 05:49:18 -0700 | [diff] [blame] | 309 | * @name: device name string or %NULL to match all |
Andrey Panin | ebad6a4 | 2005-09-06 15:18:29 -0700 | [diff] [blame] | 310 | * @from: previous device found in search, or %NULL for new search. |
| 311 | * |
| 312 | * Iterates through the list of known onboard devices. If a device is |
| 313 | * found with a matching @vendor and @device, a pointer to its device |
| 314 | * structure is returned. Otherwise, %NULL is returned. |
Randy Dunlap | b0ef371 | 2006-06-25 05:49:18 -0700 | [diff] [blame] | 315 | * A new search is initiated by passing %NULL as the @from argument. |
Andrey Panin | ebad6a4 | 2005-09-06 15:18:29 -0700 | [diff] [blame] | 316 | * If @from is not %NULL, searches continue from next device. |
| 317 | */ |
| 318 | struct dmi_device * dmi_find_device(int type, const char *name, |
| 319 | struct dmi_device *from) |
| 320 | { |
| 321 | struct list_head *d, *head = from ? &from->list : &dmi_devices; |
| 322 | |
| 323 | for(d = head->next; d != &dmi_devices; d = d->next) { |
| 324 | struct dmi_device *dev = list_entry(d, struct dmi_device, list); |
| 325 | |
| 326 | if (((type == DMI_DEV_TYPE_ANY) || (dev->type == type)) && |
| 327 | ((name == NULL) || (strcmp(dev->name, name) == 0))) |
| 328 | return dev; |
| 329 | } |
| 330 | |
| 331 | return NULL; |
| 332 | } |
| 333 | EXPORT_SYMBOL(dmi_find_device); |
Andi Kleen | f083a32 | 2006-03-25 16:30:19 +0100 | [diff] [blame] | 334 | |
| 335 | /** |
| 336 | * dmi_get_year - Return year of a DMI date |
| 337 | * @field: data index (like dmi_get_system_info) |
| 338 | * |
| 339 | * Returns -1 when the field doesn't exist. 0 when it is broken. |
| 340 | */ |
| 341 | int dmi_get_year(int field) |
| 342 | { |
| 343 | int year; |
| 344 | char *s = dmi_get_system_info(field); |
| 345 | |
| 346 | if (!s) |
| 347 | return -1; |
| 348 | if (*s == '\0') |
| 349 | return 0; |
| 350 | s = strrchr(s, '/'); |
| 351 | if (!s) |
| 352 | return 0; |
| 353 | |
| 354 | s += 1; |
| 355 | year = simple_strtoul(s, NULL, 0); |
| 356 | if (year && year < 100) { /* 2-digit year */ |
| 357 | year += 1900; |
| 358 | if (year < 1996) /* no dates < spec 1.0 */ |
| 359 | year += 100; |
| 360 | } |
| 361 | |
| 362 | return year; |
| 363 | } |