xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

crypto: atmel-i2c - add support for SHA204A random number generator

Browse Source 
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>
This commit is contained in:
Ard Biesheuvel
2019-05-24 18:26:49 +02:00
committed by Herbert Xu
parent c34a320176
commit da001fb651
5 changed files with 211 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/crypto/atmel-i2c.c
View File

@@ -58,6 +58,21 @@ void atmel_i2c_init_read_cmd(struct atmel_i2c_cmd *cmd)
}
EXPORT_SYMBOL(atmel_i2c_init_read_cmd);
void atmel_i2c_init_random_cmd(struct atmel_i2c_cmd *cmd)
{
cmd->word_addr = COMMAND;
cmd->opcode = OPCODE_RANDOM;
cmd->param1 = 0;
cmd->param2 = 0;
cmd->count = RANDOM_COUNT;
atmel_i2c_checksum(cmd);
cmd->msecs = MAX_EXEC_TIME_RANDOM;
cmd->rxsize = RANDOM_RSP_SIZE;
}
EXPORT_SYMBOL(atmel_i2c_init_random_cmd);
void atmel_i2c_init_genkey_cmd(struct atmel_i2c_cmd *cmd, u16 keyid)
{
cmd->word_addr = COMMAND;