Add partial support for IBM/Lenovo specific OEM types 131, 135 and
140.
Based on preliminary work by Joe "c0d3st0rm" submitted through the
dmidecode project page:
https://savannah.nongnu.org/patch/?9642
I cleaned up the code a lot to make it suitable for inclusion.
Signed-off-by: Jean Delvare <jdelv...@suse.de>
---
dmioem.c | 127 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 127 insertions(+)
--- dmidecode.orig/dmioem.c 2018-08-09 17:06:26.439874467 +0200
+++ dmidecode/dmioem.c 2018-08-09 18:08:19.950350582 +0200
@@ -36,6 +36,8 @@ enum DMI_VENDORS
VENDOR_ACER,
VENDOR_HP,
VENDOR_HPE,
+ VENDOR_IBM,
+ VENDOR_LENOVO,
};
static enum DMI_VENDORS dmi_vendor = VENDOR_UNKNOWN;
@@ -63,6 +65,10 @@ void dmi_set_vendor(const char *s)
dmi_vendor = VENDOR_HP;
else if (strncmp(s, "HPE", len) == 0 || strncmp(s, "Hewlett Packard
Enterprise", len) == 0)
dmi_vendor = VENDOR_HPE;
+ else if (strncmp(s, "IBM", len) == 0)
+ dmi_vendor = VENDOR_IBM;
+ else if (strncmp(s, "LENOVO", len) == 0)
+ dmi_vendor = VENDOR_LENOVO;
}
/*
@@ -277,6 +283,124 @@ static int dmi_decode_hp(const struct dm
return 1;
}
+static int dmi_decode_ibm_lenovo(const struct dmi_header *h)
+{
+ u8 *data = h->data;
+
+ switch (h->type)
+ {
+ case 131:
+ /*
+ * Vendor Specific: ThinkVantage Technologies feature
bits
+ *
+ * Source: Compal hel81 Service Manual Software
Specification,
+ * documented under "System Management BIOS(SM
BIOS)
+ * version 2.4 or greater"
+ *
+ * Offset | Name | Width | Description
+ * ----------------------------------------------
+ * 0x00 | Type | BYTE | 0x83
+ * 0x01 | Length | BYTE | 0x16
+ * 0x02 | Handle | WORD | Varies
+ * 0x04 | Version | BYTE | 0x01
+ * 0x05 | TVT Structure | BYTEx16 | Each of the 128
bits represents a TVT feature:
+ * | | | - bit 127 means
diagnostics (PC Doctor) is available
+ * | | |
(http://www.pc-doctor.com/company/pr-articles/45-lenovo-introduces-thinkvantage-toolbox)
+ * | | | - the rest
(126-0) are reserved/unknown
+ *
+ * It must also be followed by a string containing
+ * "TVT-Enablement". There exist other type 131 records
+ * with different length and a different string, for
+ * other purposes.
+ */
+
+ if (h->length != 0x16
+ || strcmp(dmi_string(h, 1), "TVT-Enablement") != 0)
+ return 0;
+
+ printf("ThinkVantage Technologies\n");
+ printf("\tVersion: %u\n", data[0x04]);
+ printf("\tDiagnostics: %s\n",
+ data[0x14] & 0x80 ? "Available" : "No");
+ break;
+
+ case 135:
+ /*
+ * Vendor Specific: Device Presence Detection bits
+ *
+ * Source: Compal hel81 Service Manual Software
Specification,
+ * documented as "SMBIOS Type 135: Bulk for
Lenovo
+ * Mobile PC Unique OEM Data" under appendix D.
+ *
+ * Offset | Name | Width | Description
+ * ---------------------------------------------------
+ * 0x00 | Type | BYTE | 0x87
+ * 0x01 | Length | BYTE | 0x0A
+ * 0x02 | Handle | WORD | Varies
+ * 0x04 | Signature | WORD | 0x5054
(ASCII for "TP")
+ * 0x06 | OEM struct offset | BYTE | 0x07
+ * 0x07 | OEM struct number | BYTE | 0x03, for
this structure
+ * 0x08 | OEM struct revision | BYTE | 0x01, for
this format
+ * 0x09 | Device presence bits | BYTE | Each of the
8 bits indicates device presence:
+ * | | | - bit 0
indicates the presence of a fingerprint reader
+ * | | | - the rest
(7-1) are reserved/unknown
+ *
+ * Other OEM struct number+rev combinations have been
+ * seen in the wild but we don't know how to decode
+ * them.
+ */
+
+ if (h->length < 0x0A || data[0x04] != 'T' || data[0x05]
!= 'P')
+ return 0;
+
+ /* Bail out if not the expected format */
+ if (data[0x06] != 0x07 || data[0x07] != 0x03 ||
data[0x08] != 0x01)
+ return 0;
+
+ printf("ThinkPad Device Presence Detection\n");
+ printf("\tFingerprint Reader: %s\n",
+ data[0x09] & 0x01 ? "Present" : "No");
+ break;
+
+ case 140:
+ /*
+ * Vendor Specific: ThinkPad Embedded Controller Program
+ *
+ * Source: some guesswork, and publicly available
information;
+ * Lenovo's BIOS update READMEs often contain
the ECP IDs
+ * which match the first string in this type.
+ *
+ * Offset | Name | Width | Description
+ * ----------------------------------------------------
+ * 0x00 | Type | BYTE | 0x8C
+ * 0x01 | Length | BYTE |
+ * 0x02 | Handle | WORD | Varies
+ * 0x04 | Signature | BYTEx6 | ASCII for
"LENOVO"
+ * 0x0A | OEM struct offset | BYTE | 0x0B
+ * 0x0B | OEM struct number | BYTE | 0x07, for
this structure
+ * 0x0C | OEM struct revision | BYTE | 0x01, for
this format
+ * 0x0D | ECP version ID | STRING |
+ * 0x0E | ECP release date | STRING |
+ */
+
+ if (h->length < 0x0F || memcmp(data + 4, "LENOVO", 6)
!= 0)
+ return 0;
+
+ /* Bail out if not the expected format */
+ if (data[0x0A] != 0x0B || data[0x0B] != 0x07 ||
data[0x0C] != 0x01)
+ return 0;
+
+ printf("ThinkPad Embedded Controller Program\n");
+ printf("\tVersion ID: %s\n", dmi_string(h, 1));
+ printf("\tRelease Date: %s\n", dmi_string(h, 2));
+ break;
+
+ default:
+ return 0;
+ }
+ return 1;
+}
+
/*
* Dispatch vendor-specific entries decoding
* Return 1 if decoding was successful, 0 otherwise
@@ -290,6 +414,9 @@ int dmi_decode_oem(const struct dmi_head
return dmi_decode_hp(h);
case VENDOR_ACER:
return dmi_decode_acer(h);
+ case VENDOR_IBM:
+ case VENDOR_LENOVO:
+ return dmi_decode_ibm_lenovo(h);
default:
return 0;
}
--
Jean Delvare
SUSE L3 Support
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