crypto: dcp - Added support for Freescale's DCP co-processor
This patch enables the DCP crypto functionality on imx28.
Currently, only aes-128-cbc is supported.
Moreover, the dcpboot misc-device, which is used by Freescale's
SDK tools and uses a non-software-readable OTP-key, is added.
Changes of v2:
- ring buffer for hardware-descriptors
- use of ablkcipher walk
- OTP key encryption/decryption via misc-device
(compatible to Freescale-SDK)
- overall cleanup
The DCP is also capable of sha1/sha256 but I won't be able to add
that anytime soon.
Tested with built-in runtime-self-test, tcrypt and openssl via
cryptodev 1.6 on imx28-evk and a custom built imx28-board.
Signed-off-by: Tobias Rauter <tobias.rauter@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig
index 47c6f4d..8ff7c23 100644
--- a/drivers/crypto/Kconfig
+++ b/drivers/crypto/Kconfig
@@ -286,6 +286,16 @@
This option enables support for the SAHARA HW crypto accelerator
found in some Freescale i.MX chips.
+config CRYPTO_DEV_DCP
+ tristate "Support for the DCP engine"
+ depends on ARCH_MXS && OF
+ select CRYPTO_BLKCIPHER
+ select CRYPTO_AES
+ select CRYPTO_CBC
+ help
+ This options enables support for the hardware crypto-acceleration
+ capabilities of the DCP co-processor
+
config CRYPTO_DEV_S5P
tristate "Support for Samsung S5PV210 crypto accelerator"
depends on ARCH_S5PV210