1 /* 2 * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <cdn_dp.h> 8 #include <smcc.h> 9 #include <stdlib.h> 10 #include <string.h> 11 12 __asm__( 13 ".pushsection .text.hdcp_handler, \"ax\", %progbits\n" 14 ".global hdcp_handler\n" 15 ".balign 4\n" 16 "hdcp_handler:\n" 17 ".incbin \"" __XSTRING(HDCPFW) "\"\n" 18 ".type hdcp_handler, %function\n" 19 ".size hdcp_handler, .- hdcp_handler\n" 20 ".popsection\n" 21 ); 22 23 static uint64_t *hdcp_key_pdata; 24 static struct cdn_dp_hdcp_key_1x key; 25 26 int hdcp_handler(struct cdn_dp_hdcp_key_1x *key); 27 28 uint64_t dp_hdcp_ctrl(uint64_t type) 29 { 30 switch (type) { 31 case HDCP_KEY_DATA_START_TRANSFER: 32 memset(&key, 0x00, sizeof(key)); 33 hdcp_key_pdata = (uint64_t *)&key; 34 return 0; 35 case HDCP_KEY_DATA_START_DECRYPT: 36 if (hdcp_key_pdata == (uint64_t *)(&key + 1)) 37 return hdcp_handler(&key); 38 else 39 return PSCI_E_INVALID_PARAMS; 40 default: 41 return SMC_UNK; 42 } 43 } 44 45 uint64_t dp_hdcp_store_key(uint64_t x1, 46 uint64_t x2, 47 uint64_t x3, 48 uint64_t x4, 49 uint64_t x5, 50 uint64_t x6) 51 { 52 if (hdcp_key_pdata < (uint64_t *)&key || 53 hdcp_key_pdata + 6 > (uint64_t *)(&key + 1)) 54 return PSCI_E_INVALID_PARAMS; 55 56 hdcp_key_pdata[0] = x1; 57 hdcp_key_pdata[1] = x2; 58 hdcp_key_pdata[2] = x3; 59 hdcp_key_pdata[3] = x4; 60 hdcp_key_pdata[4] = x5; 61 hdcp_key_pdata[5] = x6; 62 hdcp_key_pdata += 6; 63 64 return 0; 65 } 66
