--- /dev/null
+/*
+ * Advanced Crypto Engine - SHA Firmware
+ * Copyright (c) 2012 Samsung Electronics
+ *
+ * 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>
+
+/* 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,
+ 0x32, 0x55, 0xBF, 0xFF, 0x95, 0x60, 0x18, 0x90,
+ 0xAF, 0xD8, 0x07, 0x09};
+
+/* SHA256 value for the message of zero length */
+static const unsigned char sha256_digest_emptymsg[SHA256_SUM_LEN] = {
+ 0xE3, 0xB0, 0xC4, 0x42, 0x98, 0xFC, 0x1C, 0x14,
+ 0x9A, 0xFB, 0xF4, 0xC8, 0x99, 0x6F, 0xB9, 0x24,
+ 0x27, 0xAE, 0x41, 0xE4, 0x64, 0x9B, 0x93, 0x4C,
+ 0xA4, 0x95, 0x99, 0x1B, 0x78, 0x52, 0xB8, 0x55};
+
+int ace_sha_hash_digest(const unsigned char *pbuf, unsigned int buf_len,
+ unsigned char *pout, unsigned int hash_type)
+{
+ unsigned int i, reg, len;
+ unsigned int *pdigest;
+ struct exynos_ace_sfr *ace_sha_reg =
+ (struct exynos_ace_sfr *)samsung_get_base_ace_sfr();
+
+ if (buf_len == 0) {
+ /* ACE H/W cannot compute hash value for empty string */
+ if (hash_type == ACE_SHA_TYPE_SHA1)
+ memcpy(pout, sha1_digest_emptymsg, SHA1_SUM_LEN);
+ else
+ memcpy(pout, sha256_digest_emptymsg, SHA256_SUM_LEN);
+ return 0;
+ }
+
+ /* Flush HRDMA */
+ writel(ACE_FC_HRDMACFLUSH_ON, &ace_sha_reg->fc_hrdmac);
+ writel(ACE_FC_HRDMACFLUSH_OFF, &ace_sha_reg->fc_hrdmac);
+
+ /* Set byte swap of data in */
+ writel(ACE_HASH_SWAPDI_ON | ACE_HASH_SWAPDO_ON | ACE_HASH_SWAPIV_ON,
+ &ace_sha_reg->hash_byteswap);
+
+ /* Select Hash input mux as external source */
+ reg = readl(&ace_sha_reg->fc_fifoctrl);
+ reg = (reg & ~ACE_FC_SELHASH_MASK) | ACE_FC_SELHASH_EXOUT;
+ writel(reg, &ace_sha_reg->fc_fifoctrl);
+
+ /* Set Hash as SHA1 or SHA256 and start Hash engine */
+ reg = (hash_type == ACE_SHA_TYPE_SHA1) ?
+ ACE_HASH_ENGSEL_SHA1HASH : ACE_HASH_ENGSEL_SHA256HASH;
+ reg |= ACE_HASH_STARTBIT_ON;
+ writel(reg, &ace_sha_reg->hash_control);
+
+ /* Enable FIFO mode */
+ writel(ACE_HASH_FIFO_ON, &ace_sha_reg->hash_fifo_mode);
+
+ /* Set message length */
+ writel(buf_len, &ace_sha_reg->hash_msgsize_low);
+ writel(0, &ace_sha_reg->hash_msgsize_high);
+
+ /* Set HRDMA */
+ writel((unsigned int)pbuf, &ace_sha_reg->fc_hrdmas);
+ writel(buf_len, &ace_sha_reg->fc_hrdmal);
+
+ while ((readl(&ace_sha_reg->hash_status) & ACE_HASH_MSGDONE_MASK) ==
+ ACE_HASH_MSGDONE_OFF) {
+ /*
+ * PRNG error bit goes HIGH if a PRNG request occurs without
+ * a complete seed setup. We are using this bit to check h/w
+ * fault because proper setup is not expected in that case.
+ */
+ if ((readl(&ace_sha_reg->hash_status)
+ & ACE_HASH_PRNGERROR_MASK) == ACE_HASH_PRNGERROR_ON)
+ return -EBUSY;
+ }
+
+ /* Clear MSG_DONE bit */
+ writel(ACE_HASH_MSGDONE_ON, &ace_sha_reg->hash_status);
+
+ /* Read hash result */
+ pdigest = (unsigned int *)pout;
+ len = (hash_type == ACE_SHA_TYPE_SHA1) ? SHA1_SUM_LEN : SHA256_SUM_LEN;
+
+ for (i = 0; i < len / 4; i++)
+ pdigest[i] = readl(&ace_sha_reg->hash_result[i]);
+
+ /* Clear HRDMA pending bit */
+ writel(ACE_FC_HRDMA, &ace_sha_reg->fc_intpend);
+
+ return 0;
+}
+
+void hw_sha256(const unsigned char *pbuf, unsigned int buf_len,
+ unsigned char *pout, unsigned int chunk_size)
+{
+ if (ace_sha_hash_digest(pbuf, buf_len, pout, ACE_SHA_TYPE_SHA256))
+ debug("ACE was not setup properly or it is faulty\n");
+}
+
+void hw_sha1(const unsigned char *pbuf, unsigned int buf_len,
+ unsigned char *pout, unsigned int chunk_size)
+{
+ 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, ®->hash_seed[i]);
+
+ /* Wait for seed setup done */
+ while (1) {
+ status = readl(®->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, ®->hash_control);
+
+ /* Wait for PRNG done */
+ while (1) {
+ status = readl(®->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, ®->hash_status);
+
+ /* Read a PRNG result */
+ for (i = 0; i < ACE_HASH_PRNG_REG_NUM; i++)
+ ret += readl(®->hash_prng[i]);
+
+ seed_done = 0;
+ return ret;
+}
+
+unsigned int rand_r(unsigned int *seedp)
+{
+ srand(*seedp);
+
+ return rand();
+}
+#endif /* CONFIG_LIB_HW_RAND */
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