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authorAlbert ARIBAUD <albert.u.boot@aribaud.net>2014-04-08 09:25:08 +0200
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2014-04-08 09:25:08 +0200
commit519fdde9e6a6ebce7dc743b4f5621503d25b7a45 (patch)
tree29649f48b92b92342183f71565c34afeca0b1735 /drivers/crypto/ace_sha.c
parentc71645ad2bd5179ad21e2501c26f574e9688f02a (diff)
parent04d2f0a9f33112bd70ce4d9c451fdca1682e3a59 (diff)
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Merge branch 'u-boot/master' into 'u-boot-arm/master'
Conflicts: arch/arm/cpu/arm926ejs/mxs/Makefile include/configs/trats.h include/configs/trats2.h include/mmc.h
Diffstat (limited to 'drivers/crypto/ace_sha.c')
-rw-r--r--drivers/crypto/ace_sha.c73
1 files changed, 72 insertions, 1 deletions
diff --git a/drivers/crypto/ace_sha.c b/drivers/crypto/ace_sha.c
index acbafde..ed4f541 100644
--- a/drivers/crypto/ace_sha.c
+++ b/drivers/crypto/ace_sha.c
@@ -5,10 +5,12 @@
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
+#include "ace_sha.h"
+
+#ifdef CONFIG_SHA_HW_ACCEL
#include <sha256.h>
#include <sha1.h>
#include <asm/errno.h>
-#include "ace_sha.h"
/* SHA1 value for the message of zero length */
static const unsigned char sha1_digest_emptymsg[SHA1_SUM_LEN] = {
@@ -111,3 +113,72 @@ void hw_sha1(const unsigned char *pbuf, unsigned int buf_len,
if (ace_sha_hash_digest(pbuf, buf_len, pout, ACE_SHA_TYPE_SHA1))
debug("ACE was not setup properly or it is faulty\n");
}
+#endif /* CONFIG_SHA_HW_ACCEL */
+
+#ifdef CONFIG_LIB_HW_RAND
+static unsigned int seed_done;
+
+void srand(unsigned int seed)
+{
+ struct exynos_ace_sfr *reg =
+ (struct exynos_ace_sfr *)samsung_get_base_ace_sfr();
+ int i, status;
+
+ /* Seed data */
+ for (i = 0; i < ACE_HASH_PRNG_REG_NUM; i++)
+ writel(seed << i, &reg->hash_seed[i]);
+
+ /* Wait for seed setup done */
+ while (1) {
+ status = readl(&reg->hash_status);
+ if ((status & ACE_HASH_SEEDSETTING_MASK) ||
+ (status & ACE_HASH_PRNGERROR_MASK))
+ break;
+ }
+
+ seed_done = 1;
+}
+
+unsigned int rand(void)
+{
+ struct exynos_ace_sfr *reg =
+ (struct exynos_ace_sfr *)samsung_get_base_ace_sfr();
+ int i, status;
+ unsigned int seed = (unsigned int)&status;
+ unsigned int ret = 0;
+
+ if (!seed_done)
+ srand(seed);
+
+ /* Start PRNG */
+ writel(ACE_HASH_ENGSEL_PRNG | ACE_HASH_STARTBIT_ON, &reg->hash_control);
+
+ /* Wait for PRNG done */
+ while (1) {
+ status = readl(&reg->hash_status);
+ if (status & ACE_HASH_PRNGDONE_MASK)
+ break;
+ if (status & ACE_HASH_PRNGERROR_MASK) {
+ seed_done = 0;
+ return 0;
+ }
+ }
+
+ /* Clear Done IRQ */
+ writel(ACE_HASH_PRNGDONE_MASK, &reg->hash_status);
+
+ /* Read a PRNG result */
+ for (i = 0; i < ACE_HASH_PRNG_REG_NUM; i++)
+ ret += readl(&reg->hash_prng[i]);
+
+ seed_done = 0;
+ return ret;
+}
+
+unsigned int rand_r(unsigned int *seedp)
+{
+ srand(*seedp);
+
+ return rand();
+}
+#endif /* CONFIG_LIB_HW_RAND */