DM: crypto/rsa_mod_exp: Add rsa Modular Exponentiation DM driver

[karo-tx-uboot.git] / drivers / crypto / ace_sha.c

diff --git a/drivers/crypto/ace_sha.c b/drivers/crypto/ace_sha.c
index acbafde97cdb60fca9ad334e3661f78c502a686f..efef4911233adafe60df7065b719b2adbdd23d93 100644 (file)
--- a/drivers/crypto/ace_sha.c
+++ b/drivers/crypto/ace_sha.c
@@ -5,11 +5,13 @@
  * SPDX-License-Identifier:    GPL-2.0+
  */
 #include <common.h>
-#include <sha256.h>
-#include <sha1.h>
-#include <asm/errno.h>
 #include "ace_sha.h"
 
+#ifdef CONFIG_SHA_HW_ACCEL
+#include <u-boot/sha256.h>
+#include <u-boot/sha1.h>
+#include <asm/errno.h>
+
 /* SHA1 value for the message of zero length */
 static const unsigned char sha1_digest_emptymsg[SHA1_SUM_LEN] = {
        0xDA, 0x39, 0xA3, 0xEE, 0x5E, 0x6B, 0x4B, 0x0D,
@@ -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 */