diff options
| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2019-05-24 18:26:49 +0200 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2019-05-30 15:35:45 +0800 |
| commit | da001fb651b00e1deeaf24767dd691ae8152a4f5 (patch) | |
| tree | bdbc39075a1846256f4c7d695cb659641a744eab /drivers/crypto/atmel-i2c.h | |
| parent | c34a320176a59445d76783e5ee043d6ecd22d011 (diff) | |
crypto: atmel-i2c - add support for SHA204A random number generator
The Linaro/96boards Secure96 mezzanine contains (among other things)
an Atmel SHA204A symmetric crypto processor. This chip implements a
number of different functionalities, but one that is highly useful
for many different 96boards platforms is the random number generator.
So let's implement a driver for the SHA204A, and for the time being,
implement support for the random number generator only.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/atmel-i2c.h')
| -rw-r--r-- | drivers/crypto/atmel-i2c.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/crypto/atmel-i2c.h b/drivers/crypto/atmel-i2c.h index 82de5166acfa..c6bd43b78f33 100644 --- a/drivers/crypto/atmel-i2c.h +++ b/drivers/crypto/atmel-i2c.h @@ -7,6 +7,8 @@ #ifndef __ATMEL_I2C_H__ #define __ATMEL_I2C_H__ +#include <linux/hw_random.h> + #define ATMEL_ECC_PRIORITY 300 #define COMMAND 0x03 /* packet function */ @@ -28,6 +30,7 @@ #define GENKEY_RSP_SIZE (ATMEL_ECC_PUBKEY_SIZE + \ CMD_OVERHEAD_SIZE) #define READ_RSP_SIZE (4 + CMD_OVERHEAD_SIZE) +#define RANDOM_RSP_SIZE (32 + CMD_OVERHEAD_SIZE) #define MAX_RSP_SIZE GENKEY_RSP_SIZE /** @@ -96,15 +99,20 @@ static const struct { #define MAX_EXEC_TIME_ECDH 58 #define MAX_EXEC_TIME_GENKEY 115 #define MAX_EXEC_TIME_READ 1 +#define MAX_EXEC_TIME_RANDOM 50 /* Command opcode */ #define OPCODE_ECDH 0x43 #define OPCODE_GENKEY 0x40 #define OPCODE_READ 0x02 +#define OPCODE_RANDOM 0x1b /* Definitions for the READ Command */ #define READ_COUNT 7 +/* Definitions for the RANDOM Command */ +#define RANDOM_COUNT 7 + /* Definitions for the GenKey Command */ #define GENKEY_COUNT 7 #define GENKEY_MODE_PRIVATE 0x04 @@ -142,6 +150,7 @@ struct atmel_i2c_client_priv { u8 wake_token[WAKE_TOKEN_MAX_SIZE]; size_t wake_token_sz; atomic_t tfm_count ____cacheline_aligned; + struct hwrng hwrng; }; /** @@ -179,6 +188,7 @@ void atmel_i2c_enqueue(struct atmel_i2c_work_data *work_data, int atmel_i2c_send_receive(struct i2c_client *client, struct atmel_i2c_cmd *cmd); void atmel_i2c_init_read_cmd(struct atmel_i2c_cmd *cmd); +void atmel_i2c_init_random_cmd(struct atmel_i2c_cmd *cmd); void atmel_i2c_init_genkey_cmd(struct atmel_i2c_cmd *cmd, u16 keyid); int atmel_i2c_init_ecdh_cmd(struct atmel_i2c_cmd *cmd, struct scatterlist *pubkey); |