lenovo/x60: Add "IBM ThinkPad Embedded Controller" SMBIOS OEM String

The Linux thinkpad_acpi.c driver looks for this string while
reading information about the system it is running on.

This commit does not make the module load but it is one of
several things that the module looks for on a ThinkPad.

The use of 3 defines for the serial number template
seems odd but it's done in a way that eliminates
magic numbers, yet avoids use of strcpy, strlen,
strindex, strchr, or strspan: we can have some
correctness assured at compile time. Also, the
defines can be copy/pasted for other mainboards
and we should void errors due to people not changing
magic numbers.

Change-Id: Ief5f28d2e27bf959cb579c4c8eea9eecc9a89a7c
Signed-off-by: Peter Stuge <peter@stuge.se>
Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-on: http://review.coreboot.org/3620
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

1 files changed, 20 insertions, 0 deletions

diff --git a/src/mainboard/lenovo/x60/mainboard.c b/src/mainboard/lenovo/x60/mainboard.c
index b344ccb364..2f312f0287 100644
--- a/src/mainboard/lenovo/x60/mainboard.c
+++ b/src/mainboard/lenovo/x60/mainboard.c
@@ -36,6 +36,7 @@
 #include <pc80/mc146818rtc.h>
 #include "dock.h"
 #include <arch/x86/include/arch/acpigen.h>
+#include <smbios.h>
 #include <x86emu/x86emu.h>
 #define PANEL INT15_5F35_CL_DISPLAY_DEFAULT
 
@@ -133,9 +134,28 @@ static void mainboard_init(device_t dev)
 	}
 }
 
+static int mainboard_smbios_data(device_t dev, int *handle, unsigned long *current)
+{
+	int len;
+#define SERIALBEGIN	"IBM ThinkPad Embedded Controller -["
+#define SERIAL		"01234567890123456"
+#define SERIALEND	"]-"
+	char tpec[] = SERIALBEGIN SERIAL SERIALEND;
+
+	const char *oem_strings[] = {
+		tpec,
+	};
+
+	h8_build_id_and_function_spec_version(tpec + sizeof(SERIALBEGIN), sizeof(SERIAL));
+	len = smbios_write_type11(current, (*handle)++, oem_strings, ARRAY_SIZE(oem_strings));
+
+	return len;
+}
+
 static void mainboard_enable(device_t dev)
 {
 	dev->ops->init = mainboard_init;
+	dev->ops->get_smbios_data = mainboard_smbios_data;
 }
 
 struct chip_operations mainboard_ops = {