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-rw-r--r--plat/mediatek/mt8173/drivers/crypt/crypt.c123
-rw-r--r--plat/mediatek/mt8173/drivers/crypt/crypt.h16
2 files changed, 139 insertions, 0 deletions
diff --git a/plat/mediatek/mt8173/drivers/crypt/crypt.c b/plat/mediatek/mt8173/drivers/crypt/crypt.c
new file mode 100644
index 0000000..bfb3082
--- /dev/null
+++ b/plat/mediatek/mt8173/drivers/crypt/crypt.c
@@ -0,0 +1,123 @@
+/*
+ * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+
+#include <arch.h>
+#include <arch_helpers.h>
+#include <common/debug.h>
+#include <drivers/delay_timer.h>
+#include <lib/mmio.h>
+
+#include <mt8173_def.h>
+#include <mtk_sip_svc.h>
+
+#define crypt_read32(offset) \
+ mmio_read_32((uintptr_t)(CRYPT_BASE+((offset) * 4)))
+
+#define crypt_write32(offset, value) \
+ mmio_write_32((uintptr_t)(CRYPT_BASE + ((offset) * 4)), (uint32_t)value)
+
+#define GET_L32(x) ((uint32_t)(x & 0xffffffff))
+#define GET_H32(x) ((uint32_t)((x >> 32) & 0xffffffff))
+
+#define REG_INIT 0
+#define REG_MSC 4
+#define REG_TRIG 256
+#define REG_STAT 512
+#define REG_CLR 513
+#define REG_INT 514
+#define REG_P68 768
+#define REG_P69 769
+#define REG_P70 770
+#define REG_P71 771
+#define REG_P72 772
+#define REG_D20 820
+#define KEY_SIZE 160
+#define KEY_LEN 40
+
+/* Wait until crypt is completed */
+uint64_t crypt_wait(void)
+{
+ crypt_write32(REG_TRIG, 0);
+ while (crypt_read32(REG_STAT) == 0)
+ ;
+ udelay(100);
+ crypt_write32(REG_CLR, crypt_read32(REG_STAT));
+ crypt_write32(REG_INT, 0);
+ return MTK_SIP_E_SUCCESS;
+}
+
+static uint32_t record[4];
+/* Copy encrypted key to crypt engine */
+uint64_t crypt_set_hdcp_key_ex(uint64_t x1, uint64_t x2, uint64_t x3)
+{
+ uint32_t i = (uint32_t)x1;
+ uint32_t j = 0;
+
+ if (i > KEY_LEN)
+ return MTK_SIP_E_INVALID_PARAM;
+
+ if (i < KEY_LEN) {
+ crypt_write32(REG_MSC, 0x80ff3800);
+ crypt_write32(REG_INIT, 0);
+ crypt_write32(REG_INIT, 0xF);
+ crypt_write32(REG_CLR, 1);
+ crypt_write32(REG_INT, 0);
+
+ crypt_write32(REG_P68, 0x70);
+ crypt_write32(REG_P69, 0x1C0);
+ crypt_write32(REG_P70, 0x30);
+ crypt_write32(REG_P71, 0x4);
+ crypt_wait();
+
+ crypt_write32(REG_D20 + 4 * i, GET_L32(x2));
+ crypt_write32(REG_D20 + 4 * i + 1, GET_H32(x2));
+ crypt_write32(REG_D20 + 4 * i + 2, GET_L32(x3));
+ crypt_write32(REG_D20 + 4 * i + 3, GET_H32(x3));
+
+ crypt_write32(REG_P69, 0);
+ crypt_write32(REG_P68, 0x20);
+ crypt_write32(REG_P71, 0x34 + 4 * i);
+ crypt_write32(REG_P72, 0x34 + 4 * i);
+ crypt_wait();
+
+ for (j = 0; j < 4; j++) {
+ crypt_write32(REG_P68, 0x71);
+ crypt_write32(REG_P69, 0x34 + 4 * i + j);
+ crypt_write32(REG_P70, record[j]);
+ crypt_wait();
+ }
+ }
+ /* Prepare data for next iteration */
+ record[0] = GET_L32(x2);
+ record[1] = GET_H32(x2);
+ record[2] = GET_L32(x3);
+ record[3] = GET_H32(x3);
+ return MTK_SIP_E_SUCCESS;
+}
+
+/* Set key to hdcp */
+uint64_t crypt_set_hdcp_key_num(uint32_t num)
+{
+ if (num > KEY_LEN)
+ return MTK_SIP_E_INVALID_PARAM;
+
+ crypt_write32(REG_P68, 0x6A);
+ crypt_write32(REG_P69, 0x34 + 4 * num);
+ crypt_wait();
+ return MTK_SIP_E_SUCCESS;
+}
+
+/* Clear key in crypt engine */
+uint64_t crypt_clear_hdcp_key(void)
+{
+ uint32_t i;
+
+ for (i = 0; i < KEY_SIZE; i++)
+ crypt_write32(REG_D20 + i, 0);
+ return MTK_SIP_E_SUCCESS;
+}
diff --git a/plat/mediatek/mt8173/drivers/crypt/crypt.h b/plat/mediatek/mt8173/drivers/crypt/crypt.h
new file mode 100644
index 0000000..1a691a6
--- /dev/null
+++ b/plat/mediatek/mt8173/drivers/crypt/crypt.h
@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+#ifndef CRYPT_H
+#define CRYPT_H
+
+#include <stdint.h>
+
+/* crypt function prototype */
+uint64_t crypt_set_hdcp_key_ex(uint64_t x1, uint64_t x2, uint64_t x3);
+uint64_t crypt_set_hdcp_key_num(uint32_t num);
+uint64_t crypt_clear_hdcp_key(void);
+
+#endif /* CRYPT_H */