1 /* SPDX-License-Identifier: GPL-2.0-only */
2
3 #include <stdint.h>
4 #include <string.h>
5 #include <ctype.h>
6 #include <commonlib/helpers.h>
7 #include <uuid.h>
8 #include <console/console.h>
9 #include <device/device.h>
10 #include <device/i2c_bus.h>
11 #include <smbios.h>
12
13 #include "eeprom.h"
14
15 #define MAX_STRING_LENGTH UUID_STRLEN
16
17 static struct device *eeprom;
18
eeprom_read_string(const enum bx26_strings idx)19 static const char *eeprom_read_string(const enum bx26_strings idx)
20 {
21 static char str[MAX_STRING_LENGTH + 1];
22
23 if (!eeprom) {
24 printk(BIOS_WARNING, "DMI: Serial EEPROM not found\n");
25 str[0] = '\0';
26 return str;
27 }
28
29 const size_t offset = bx26_locations[idx].offset;
30 const size_t length = MIN(bx26_locations[idx].length, MAX_STRING_LENGTH);
31
32 if (i2c_dev_read_at16(eeprom, (u8 *)str, length, offset) != length) {
33 printk(BIOS_WARNING, "DMI: Failed to read serial EEPROM\n");
34 str[0] = '\0';
35 } else {
36 unsigned int i;
37 /* Terminate at first non-printable character. */
38 for (i = 0; i < length; ++i) {
39 if (!isprint(str[i]))
40 break;
41 }
42 str[i] = '\0';
43 }
44
45 return str;
46 }
47
smbios_system_manufacturer(void)48 const char *smbios_system_manufacturer(void)
49 {
50 return eeprom_read_string(SYSTEM_MANUFACTURER);
51 }
52
smbios_system_product_name(void)53 const char *smbios_system_product_name(void)
54 {
55 return eeprom_read_string(SYSTEM_PRODUCT_NAME);
56 }
57
smbios_system_serial_number(void)58 const char *smbios_system_serial_number(void)
59 {
60 return eeprom_read_string(SYSTEM_SERIAL_NUMBER);
61 }
62
smbios_system_version(void)63 const char *smbios_system_version(void)
64 {
65 return eeprom_read_string(SYSTEM_VERSION);
66 }
67
smbios_system_set_uuid(u8 * const uuid)68 void smbios_system_set_uuid(u8 *const uuid)
69 {
70 if (parse_uuid(uuid, eeprom_read_string(SYSTEM_UUID))) {
71 printk(BIOS_WARNING, "DMI: Cannot parse UUID\n");
72 memset(uuid, 0x00, UUID_LEN);
73 }
74 }
75
smbios_mainboard_serial_number(void)76 const char *smbios_mainboard_serial_number(void)
77 {
78 return eeprom_read_string(BOARD_SERIAL_NUMBER);
79 }
80
smbios_mainboard_version(void)81 const char *smbios_mainboard_version(void)
82 {
83 return eeprom_read_string(BOARD_VERSION);
84 }
85
enable_dev(struct device * dev)86 static void enable_dev(struct device *dev)
87 {
88 if (dev->path.type != DEVICE_PATH_I2C || (dev->path.i2c.device & 0xf0) != 0x50)
89 return;
90 eeprom = dev;
91 }
92
93 struct chip_operations drivers_secunet_dmi_ops = {
94 .name = "secunet DMI",
95 .enable_dev = enable_dev,
96 };
97