[U-Boot] [PATCH v2 03/28] tpm: Add Kconfig options for TPMs

[Simon Glass]

Add new Kconfig options for TPMs in preparation for moving boards to use
Kconfig for TPM configuration.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

Changes in v2:
- Add a 'TPM' menu in Kconfig

 common/Kconfig      | 12 +++++++++++
 drivers/tpm/Kconfig | 60 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 lib/Kconfig         | 10 +++++++++
 3 files changed, 82 insertions(+)

diff --git a/common/Kconfig b/common/Kconfig
index 88dc016..bacc4e0 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -625,4 +625,16 @@ config CMD_REGULATOR
 
 endmenu
 
+menu "Security commands"
+config CMD_TPM
+	bool "Enable the 'tpm' command"
+	depends on TPM
+	help
+	  This provides a means to talk to a TPM from the command line. A wide
+	  range of commands if provided - see 'tpm help' for details. The
+	  command requires a suitable TPM on your board and the correct driver
+	  must be enabled.
+
+endmenu
+
 endmenu
diff --git a/drivers/tpm/Kconfig b/drivers/tpm/Kconfig
index f408b8a..9101fc2 100644
--- a/drivers/tpm/Kconfig
+++ b/drivers/tpm/Kconfig
@@ -1,7 +1,67 @@
+#
+# TPM subsystem configuration
+#
+
+menu "TPM support"
+
 config TPM_TIS_SANDBOX
 	bool "Enable sandbox TPM driver"
+	depends on SANDBOX
 	help
 	  This driver emulates a TPM, providing access to base functions
 	  such as reading and writing TPM private data. This is enough to
 	  support Chrome OS verified boot. Extend functionality is not
 	  implemented.
+
+config TPM_ATMEL_TWI
+	bool "Enable Atmel TWI TPM device driver"
+	depends on TPM
+	help
+	  This driver supports an Atmel TPM device connected on the I2C bus.
+	  The usual tpm operations and the 'tpm' command can be used to talk
+	  to the device using the standard TPM Interface Specification (TIS)
+	  protocol
+
+config TPM_TIS_I2C
+	bool "Enable support for Infineon SLB9635/45 TPMs on I2C"
+	depends on TPM && DM_I2C
+	help
+	  This driver supports Infineon TPM devices connected on the I2C bus.
+	  The usual tpm operations and the 'tpm' command can be used to talk
+	  to the device using the standard TPM Interface Specification (TIS)
+	  protocol
+
+config TPM_TIS_I2C_BURST_LIMITATION
+	bool "Enable I2C burst length limitation"
+	depends on TPM_TIS_I2C
+	help
+	  Some broken TPMs have a limitation on the number of bytes they can
+	  receive in one message. Enable this option to allow you to set this
+	  option. The can allow a broken TPM to be used by splitting messages
+	  into separate pieces.
+
+config TPM_TIS_I2C_BURST_LIMITATION_LEN
+	int "Length"
+	depends on TPM_TIS_I2C_BURST_LIMITATION
+	help
+	  Use this to set the burst limitation length
+
+config TPM_TIS_LPC
+	bool "Enable support for Infineon SLB9635/45 TPMs on LPC"
+	depends on TPM && X86
+	help
+	  This driver supports Infineon TPM devices connected on the I2C bus.
+	  The usual tpm operations and the 'tpm' command can be used to talk
+	  to the device using the standard TPM Interface Specification (TIS)
+	  protocol
+
+config TPM_AUTH_SESSIONS
+	bool "Enable TPM authentication session support"
+	depends on TPM
+	help
+	  Enable support for authorised (AUTH1) commands as specified in the
+	  TCG Main Specification 1.2. OIAP-authorised versions of the commands
+	  TPM_LoadKey2 and TPM_GetPubKey are provided. Both features are
+	  available using the 'tpm' command, too.
+
+endmenu
diff --git a/lib/Kconfig b/lib/Kconfig
index 884218a..0673072 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -54,6 +54,16 @@ source lib/dhry/Kconfig
 
 source lib/rsa/Kconfig
 
+config TPM
+	bool "Trusted Platform Module (TPM) Support"
+	help
+	  This enables support for TPMs which can be used to provide security
+	  features for your board. The TPM can be connected via LPC or I2C
+	  and a sandbox TPM is provided for testing purposes. Use the 'tpm'
+	  command to interactive the TPM. Driver model support is provided
+	  for the low-level TPM interface, but only one TPM is supported at
+	  a time by the TPM library.
+
 menu "Hashing Support"
 
 config SHA1
-- 
2.5.0.457.gab17608