mainboard/intel/galileo: Add vboot support

Add the necessary files and changes to support vboot.

TEST=Build and run on Galileo Gen2 with a SparkFun CryptoShield

1.  Obtain and install a SparkFun CryptoShield.
    https://www.sparkfun.com/products/13183

2.  Edit src/mainboard/intel/galileo/Kconfig to select
    VBOOT_WITH_CRYPTO_SHIELD

3.  Use make menuconfig to update the config values and select a
    payload that will fit.  I used SeaBIOS which does not boot.

4.  Build coreboot

5.  Use the command file below to generate the signed coreboot image.

6.  Flash build/coreboot.rom onto the Galileo board

7.  The test is successful if verstage detects that it needs recovery
    after Phase 1.  This is expected because the image does not contain
    the GBB section.

8.  Flash build/coreboot.signed.bin onto the Galileo board

9.  The test is successful if verstage reaches Phase 4 and selects SLOT
    A to load the rest of the files.

commands:
gbb_utility -c 0x100,0x1000,0x7ce80,0x1000 gbb.blob

dd  conv=fdatasync  ibs=4096  obs=4096  count=1553  \
if=build/coreboot.rom  of=build/coreboot.signed.rom

dd  conv=fdatasync  obs=4096  obs=4096  seek=1553  if=gbb.blob  \
of=build/coreboot.signed.rom

dd  conv=fdatasync  ibs=4096  obs=4096  skip=1680  seek=1680  \
count=368  if=build/coreboot.rom  of=build/coreboot.signed.rom

gbb_utility                       \
--set --hwid='Galileo'            \
-r $PWD/keys/recovery_key.vbpubk  \
-k $PWD/keys/root_key.vbpubk      \
build/coreboot.signed.rom

3rdparty/vboot/scripts/image_signing/sign_firmware.sh  \
build/coreboot.signed.rom                              \
$PWD/keys                                              \
build/coreboot.signed.rom

Change-Id: I02eb0ef647cd34c13a5fe8be0bdbe1bb38524d0c
Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com>
Reviewed-on: https://review.coreboot.org/18821
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

1 files changed, 111 insertions, 0 deletions

diff --git a/src/mainboard/intel/galileo/vboot.c b/src/mainboard/intel/galileo/vboot.c
new file mode 100644
index 0000000000..cc8831eaeb
--- /dev/null
+++ b/src/mainboard/intel/galileo/vboot.c
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2016-2017 Intel Corporation
+ *
+ * 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; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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 <assert.h>
+#include <bootmode.h>
+#include <console/console.h>
+#include <delay.h>
+#include <device/i2c.h>
+#include <lib.h>
+#include <soc/i2c.h>
+#include <soc/reg_access.h>
+#include "reg_access.h"
+#include "gen1.h"
+#include "gen2.h"
+#include <spi_flash.h>
+#include <vboot/vboot_common.h>
+
+int clear_recovery_mode_switch(void)
+{
+	/* Nothing to do */
+	return 0;
+}
+
+int get_developer_mode_switch(void)
+{
+	return 0;
+}
+
+int get_recovery_mode_switch(void)
+{
+	return 0;
+}
+
+int get_sw_write_protect_state(void)
+{
+	/* Not write protected */
+	return 0;
+}
+
+int get_write_protect_state(void)
+{
+	/* Not write protected */
+	return 0;
+}
+
+void log_recovery_mode_switch(void)
+{
+}
+
+void verstage_mainboard_init(void)
+{
+	const struct reg_script *script;
+
+	/* Crypto Shield I2C Addresses:
+	 *
+	 * 0x29: AT97S3204T - TPM 1.2
+	 * 0x50: ATAES132 - AES-128
+	 * 0x60: ATECC108 - Elliptical Curve
+	 * 0x64: ATSHA204 - SHA-256
+	 * 0x68: DS3231M - RTC
+	 */
+
+	/* Determine the correct script for the board */
+	if (IS_ENABLED(CONFIG_GALILEO_GEN2))
+		script = gen2_i2c_init;
+	else
+		/* Determine which I2C address is in use */
+		script = (reg_legacy_gpio_read (R_QNC_GPIO_RGLVL_RESUME_WELL)
+			& GALILEO_DETERMINE_IOEXP_SLA_RESUMEWELL_GPIO)
+			? gen1_i2c_0x20_init : gen1_i2c_0x21_init;
+
+	/* Direct the I2C SDA and SCL signals to the Arduino connector */
+	reg_script_run(script);
+}
+
+void __attribute__((weak)) vboot_platform_prepare_reboot(void)
+{
+	const struct reg_script *script;
+
+	/* Crypto Shield I2C Addresses:
+	 *
+	 * 0x29: AT97S3204T - TPM 1.2
+	 * 0x50: ATAES132 - AES-128
+	 * 0x60: ATECC108 - Elliptical Curve
+	 * 0x64: ATSHA204 - SHA-256
+	 * 0x68: DS3231M - RTC
+	 */
+
+	/* Determine the correct script for the board */
+	if (IS_ENABLED(CONFIG_GALILEO_GEN2))
+		script = gen2_tpm_reset;
+	else
+		/* Determine which I2C address is in use */
+		script = (reg_legacy_gpio_read (R_QNC_GPIO_RGLVL_RESUME_WELL)
+			& GALILEO_DETERMINE_IOEXP_SLA_RESUMEWELL_GPIO)
+			? gen1_tpm_reset_0x20 : gen1_tpm_reset_0x21;
+
+	/* Reset the TPM */
+	reg_script_run(script);
+}