at91: video: atmel_hlcdfb.c: fix bad timing configuration

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

diff --git a/drivers/crypto/ace_sha.c b/drivers/crypto/ace_sha.c
index 53ebb33006197127b3dff1d8d5dd9d9ae0c829fd..ed4f5418238c710d34da4751ffdb769df6d195d9 100644 (file)
--- a/drivers/crypto/ace_sha.c
+++ b/drivers/crypto/ace_sha.c
@@ -2,26 +2,15 @@
  * Advanced Crypto Engine - SHA Firmware
  * Copyright (c) 2012  Samsung Electronics
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- *
+ * 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] = {
@@ -124,3 +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 */