developer | eee2980 | 2016-05-11 18:45:20 +0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved. |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions are met: |
| 6 | * |
| 7 | * Redistributions of source code must retain the above copyright notice, this |
| 8 | * list of conditions and the following disclaimer. |
| 9 | * |
| 10 | * Redistributions in binary form must reproduce the above copyright notice, |
| 11 | * this list of conditions and the following disclaimer in the documentation |
| 12 | * and/or other materials provided with the distribution. |
| 13 | * |
| 14 | * Neither the name of ARM nor the names of its contributors may be used |
| 15 | * to endorse or promote products derived from this software without specific |
| 16 | * prior written permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 19 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| 22 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 23 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 24 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 25 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 26 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 27 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 28 | * POSSIBILITY OF SUCH DAMAGE. |
| 29 | */ |
| 30 | #include <arch.h> |
| 31 | #include <arch_helpers.h> |
| 32 | #include <assert.h> |
| 33 | #include <debug.h> |
| 34 | #include <delay_timer.h> |
| 35 | #include <mmio.h> |
| 36 | #include <mt8173_def.h> |
| 37 | #include <mtk_sip_svc.h> |
| 38 | |
| 39 | #define crypt_read32(offset) \ |
| 40 | mmio_read_32((uintptr_t)(CRYPT_BASE+((offset) * 4))) |
| 41 | |
| 42 | #define crypt_write32(offset, value) \ |
| 43 | mmio_write_32((uintptr_t)(CRYPT_BASE + ((offset) * 4)), (uint32_t)value) |
| 44 | |
| 45 | #define GET_L32(x) ((uint32_t)(x & 0xffffffff)) |
| 46 | #define GET_H32(x) ((uint32_t)((x >> 32) & 0xffffffff)) |
| 47 | |
| 48 | #define REG_INIT 0 |
| 49 | #define REG_MSC 4 |
| 50 | #define REG_TRIG 256 |
| 51 | #define REG_STAT 512 |
| 52 | #define REG_CLR 513 |
| 53 | #define REG_INT 514 |
| 54 | #define REG_P68 768 |
| 55 | #define REG_P69 769 |
| 56 | #define REG_P70 770 |
| 57 | #define REG_P71 771 |
| 58 | #define REG_P72 772 |
| 59 | #define REG_D20 820 |
| 60 | #define KEY_SIZE 160 |
| 61 | #define KEY_LEN 40 |
| 62 | |
| 63 | /* Wait until crypt is completed */ |
| 64 | uint64_t crypt_wait(void) |
| 65 | { |
| 66 | crypt_write32(REG_TRIG, 0); |
| 67 | while (crypt_read32(REG_STAT) == 0) |
| 68 | ; |
| 69 | udelay(100); |
| 70 | crypt_write32(REG_CLR, crypt_read32(REG_STAT)); |
| 71 | crypt_write32(REG_INT, 0); |
| 72 | return MTK_SIP_E_SUCCESS; |
| 73 | } |
| 74 | |
| 75 | static uint32_t record[4]; |
| 76 | /* Copy encrypted key to crypt engine */ |
| 77 | uint64_t crypt_set_hdcp_key_ex(uint64_t x1, uint64_t x2, uint64_t x3) |
| 78 | { |
| 79 | uint32_t i = (uint32_t)x1; |
| 80 | uint32_t j = 0; |
| 81 | |
| 82 | if (i > KEY_LEN) |
| 83 | return MTK_SIP_E_INVALID_PARAM; |
| 84 | |
| 85 | if (i < KEY_LEN) { |
| 86 | crypt_write32(REG_MSC, 0x80ff3800); |
| 87 | crypt_write32(REG_INIT, 0); |
| 88 | crypt_write32(REG_INIT, 0xF); |
| 89 | crypt_write32(REG_CLR, 1); |
| 90 | crypt_write32(REG_INT, 0); |
| 91 | |
| 92 | crypt_write32(REG_P68, 0x70); |
| 93 | crypt_write32(REG_P69, 0x1C0); |
| 94 | crypt_write32(REG_P70, 0x30); |
| 95 | crypt_write32(REG_P71, 0x4); |
| 96 | crypt_wait(); |
| 97 | |
| 98 | crypt_write32(REG_D20 + 4 * i, GET_L32(x2)); |
| 99 | crypt_write32(REG_D20 + 4 * i + 1, GET_H32(x2)); |
| 100 | crypt_write32(REG_D20 + 4 * i + 2, GET_L32(x3)); |
| 101 | crypt_write32(REG_D20 + 4 * i + 3, GET_H32(x3)); |
| 102 | |
| 103 | crypt_write32(REG_P69, 0); |
| 104 | crypt_write32(REG_P68, 0x20); |
| 105 | crypt_write32(REG_P71, 0x34 + 4 * i); |
| 106 | crypt_write32(REG_P72, 0x34 + 4 * i); |
| 107 | crypt_wait(); |
| 108 | |
| 109 | for (j = 0; j < 4; j++) { |
| 110 | crypt_write32(REG_P68, 0x71); |
| 111 | crypt_write32(REG_P69, 0x34 + 4 * i + j); |
| 112 | crypt_write32(REG_P70, record[j]); |
| 113 | crypt_wait(); |
| 114 | } |
| 115 | } |
| 116 | /* Prepare data for next iteration */ |
| 117 | record[0] = GET_L32(x2); |
| 118 | record[1] = GET_H32(x2); |
| 119 | record[2] = GET_L32(x3); |
| 120 | record[3] = GET_H32(x3); |
| 121 | return MTK_SIP_E_SUCCESS; |
| 122 | } |
| 123 | |
| 124 | /* Set key to hdcp */ |
| 125 | uint64_t crypt_set_hdcp_key_num(uint32_t num) |
| 126 | { |
| 127 | if (num > KEY_LEN) |
| 128 | return MTK_SIP_E_INVALID_PARAM; |
| 129 | |
| 130 | crypt_write32(REG_P68, 0x6A); |
| 131 | crypt_write32(REG_P69, 0x34 + 4 * num); |
| 132 | crypt_wait(); |
| 133 | return MTK_SIP_E_SUCCESS; |
| 134 | } |
| 135 | |
| 136 | /* Clear key in crypt engine */ |
| 137 | uint64_t crypt_clear_hdcp_key(void) |
| 138 | { |
| 139 | uint32_t i; |
| 140 | |
| 141 | for (i = 0; i < KEY_SIZE; i++) |
| 142 | crypt_write32(REG_D20 + i, 0); |
| 143 | return MTK_SIP_E_SUCCESS; |
| 144 | } |