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authorMatt DeVillier <matt.devillier@puri.sm>2019-12-23 16:08:37 -0600
committerPatrick Georgi <pgeorgi@google.com>2019-12-26 10:49:03 +0000
commit92b0e8dcae99fea39f167b07063818581a83b1c3 (patch)
treee7586e9768981660263bb546fd04aedd4acb072c /src/drivers
parentf9ad22d9f7defafd5cccdb8cf40f28f6e9366425 (diff)
downloadcoreboot-92b0e8dcae99fea39f167b07063818581a83b1c3.tar.xz
drivers/generic/cbfs-serial: Add driver to read serial from CBFS
Add a new driver to support reading a board serial number from a text file in CBFS and injecting into the SMBIOS tables. Allow driver to be selected at the .config level and not require inclusion at the board level. Signed-off-by: Matt DeVillier <matt.devillier@puri.sm> Change-Id: Ieae39f39ab36e5b1f240383b7cf47681d9a311af Reviewed-on: https://review.coreboot.org/c/coreboot/+/37917 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Martin Roth <martinroth@google.com>
Diffstat (limited to 'src/drivers')
-rw-r--r--src/drivers/generic/cbfs-serial/Kconfig6
-rw-r--r--src/drivers/generic/cbfs-serial/Makefile.inc1
-rw-r--r--src/drivers/generic/cbfs-serial/cbfs-serial.c50
3 files changed, 57 insertions, 0 deletions
diff --git a/src/drivers/generic/cbfs-serial/Kconfig b/src/drivers/generic/cbfs-serial/Kconfig
new file mode 100644
index 0000000000..209c242dba
--- /dev/null
+++ b/src/drivers/generic/cbfs-serial/Kconfig
@@ -0,0 +1,6 @@
+config DRIVERS_GENERIC_CBFS_SERIAL
+ bool "Serial number in CBFS"
+ default n
+ help
+ Enable this option to read the board serial number from a
+ text file located in CBFS.
diff --git a/src/drivers/generic/cbfs-serial/Makefile.inc b/src/drivers/generic/cbfs-serial/Makefile.inc
new file mode 100644
index 0000000000..163d439ba9
--- /dev/null
+++ b/src/drivers/generic/cbfs-serial/Makefile.inc
@@ -0,0 +1 @@
+ramstage-$(CONFIG_DRIVERS_GENERIC_CBFS_SERIAL) += cbfs-serial.c
diff --git a/src/drivers/generic/cbfs-serial/cbfs-serial.c b/src/drivers/generic/cbfs-serial/cbfs-serial.c
new file mode 100644
index 0000000000..ee3e36620c
--- /dev/null
+++ b/src/drivers/generic/cbfs-serial/cbfs-serial.c
@@ -0,0 +1,50 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <cbfs.h>
+#include <device/device.h>
+#include <smbios.h>
+#include <string.h>
+
+
+#define MAX_SERIAL_LENGTH 0x100
+
+const char *smbios_mainboard_serial_number(void)
+{
+ static char serial_number[MAX_SERIAL_LENGTH + 1] = {0};
+ struct cbfsf file;
+
+ if (serial_number[0] != 0)
+ return serial_number;
+
+ if (cbfs_boot_locate(&file, "serial_number", NULL) == 0) {
+ struct region_device cbfs_region;
+ size_t serial_len;
+
+ cbfs_file_data(&cbfs_region, &file);
+
+ serial_len = region_device_sz(&cbfs_region);
+ if (serial_len <= MAX_SERIAL_LENGTH) {
+ if (rdev_readat(&cbfs_region, serial_number, 0,
+ serial_len) == serial_len) {
+ serial_number[serial_len] = 0;
+ return serial_number;
+ }
+ }
+ }
+
+ strncpy(serial_number, CONFIG_MAINBOARD_SERIAL_NUMBER,
+ MAX_SERIAL_LENGTH);
+
+ return serial_number;
+}