Julius Werner | 33df495 | 2014-12-16 22:48:26 -0800 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the coreboot project. |
| 3 | * |
| 4 | * Copyright 2014 Google Inc. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; version 2 of the License. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
Julius Werner | 33df495 | 2014-12-16 22:48:26 -0800 | [diff] [blame] | 14 | */ |
| 15 | |
| 16 | #include <arch/io.h> |
| 17 | #include <assert.h> |
| 18 | #include <delay.h> |
| 19 | #include <soc/addressmap.h> |
| 20 | #include <soc/soc.h> |
| 21 | #include <types.h> |
| 22 | #include <vb2_api.h> |
| 23 | |
| 24 | enum rk3288_crypto_interrupt_bits { |
| 25 | PKA_DONE = 1 << 5, |
| 26 | HASH_DONE = 1 << 4, |
| 27 | HRDMA_ERR = 1 << 3, |
| 28 | HRDMA_DONE = 1 << 2, |
| 29 | BCDMA_ERR = 1 << 1, |
| 30 | BCDMA_DONE = 1 << 0, |
| 31 | }; |
| 32 | |
| 33 | struct rk3288_crypto { |
| 34 | u32 intsts; |
| 35 | u32 intena; |
| 36 | u32 ctrl; |
| 37 | u32 conf; |
| 38 | u32 brdmas; |
| 39 | u32 btdmas; |
| 40 | u32 btdmal; |
| 41 | u32 hrdmas; |
| 42 | u32 hrdmal; |
| 43 | u8 _res0[0x80 - 0x24]; |
| 44 | u32 aes_ctrl; |
| 45 | u32 aes_sts; |
| 46 | u32 aes_din[4]; |
| 47 | u32 aes_dout[4]; |
| 48 | u32 aes_iv[4]; |
| 49 | u32 aes_key[8]; |
| 50 | u32 aes_cnt[4]; |
| 51 | u8 _res1[0x100 - 0xe8]; |
| 52 | u32 tdes_ctrl; |
| 53 | u32 tdes_sts; |
| 54 | u32 tdes_din[2]; |
| 55 | u32 tdes_dout[2]; |
| 56 | u32 tdes_iv[2]; |
| 57 | u32 tdes_key[3][2]; |
| 58 | u8 _res2[0x180 - 0x138]; |
| 59 | u32 hash_ctrl; |
| 60 | u32 hash_sts; |
| 61 | u32 hash_msg_len; |
| 62 | u32 hash_dout[8]; |
| 63 | u32 hash_seed[5]; |
| 64 | u8 _res3[0x200 - 0x1c0]; |
| 65 | u32 trng_ctrl; |
| 66 | u32 trng_dout[8]; |
| 67 | } *crypto = (void *)CRYPTO_BASE; |
| 68 | check_member(rk3288_crypto, trng_dout[7], 0x220); |
| 69 | |
| 70 | int vb2ex_hwcrypto_digest_init(enum vb2_hash_algorithm hash_alg, |
| 71 | uint32_t data_size) |
| 72 | { |
| 73 | if (hash_alg != VB2_HASH_SHA256) { |
| 74 | printk(BIOS_INFO, "RK3288 doesn't support hash_alg %d!\n", |
| 75 | hash_alg); |
| 76 | return VB2_ERROR_EX_HWCRYPTO_UNSUPPORTED; |
| 77 | } |
| 78 | |
Julius Werner | 2f37bd6 | 2015-02-19 14:51:15 -0800 | [diff] [blame] | 79 | write32(&crypto->ctrl, RK_SETBITS(1 << 6)); /* Assert HASH_FLUSH */ |
Julius Werner | 33df495 | 2014-12-16 22:48:26 -0800 | [diff] [blame] | 80 | udelay(1); /* for 10+ cycles to */ |
Julius Werner | 2f37bd6 | 2015-02-19 14:51:15 -0800 | [diff] [blame] | 81 | write32(&crypto->ctrl, RK_CLRBITS(1 << 6)); /* clear out old hash */ |
Julius Werner | 33df495 | 2014-12-16 22:48:26 -0800 | [diff] [blame] | 82 | |
| 83 | /* Enable DMA byte swapping for little-endian bus (Byteswap_??FIFO) */ |
Julius Werner | 2f37bd6 | 2015-02-19 14:51:15 -0800 | [diff] [blame] | 84 | write32(&crypto->conf, 1 << 5 | 1 << 4 | 1 << 3); |
Julius Werner | 33df495 | 2014-12-16 22:48:26 -0800 | [diff] [blame] | 85 | |
Julius Werner | 2f37bd6 | 2015-02-19 14:51:15 -0800 | [diff] [blame] | 86 | write32(&crypto->intena, HRDMA_ERR | HRDMA_DONE); /* enable interrupt */ |
Julius Werner | 33df495 | 2014-12-16 22:48:26 -0800 | [diff] [blame] | 87 | |
Julius Werner | 2f37bd6 | 2015-02-19 14:51:15 -0800 | [diff] [blame] | 88 | write32(&crypto->hash_msg_len, data_size); /* program total size */ |
| 89 | write32(&crypto->hash_ctrl, 1 << 3 | 0x2); /* swap DOUT, SHA256 */ |
Julius Werner | 33df495 | 2014-12-16 22:48:26 -0800 | [diff] [blame] | 90 | |
| 91 | printk(BIOS_DEBUG, "Initialized RK3288 HW crypto for %u byte SHA256\n", |
| 92 | data_size); |
| 93 | return VB2_SUCCESS; |
| 94 | } |
| 95 | |
| 96 | int vb2ex_hwcrypto_digest_extend(const uint8_t *buf, uint32_t size) |
| 97 | { |
| 98 | uint32_t intsts; |
| 99 | |
Julius Werner | 2f37bd6 | 2015-02-19 14:51:15 -0800 | [diff] [blame] | 100 | write32(&crypto->intsts, HRDMA_ERR | HRDMA_DONE); /* clear interrupts */ |
Julius Werner | 33df495 | 2014-12-16 22:48:26 -0800 | [diff] [blame] | 101 | |
| 102 | /* NOTE: This assumes that the DMA is reading from uncached SRAM. */ |
Julius Werner | 2f37bd6 | 2015-02-19 14:51:15 -0800 | [diff] [blame] | 103 | write32(&crypto->hrdmas, (uint32_t)buf); |
| 104 | write32(&crypto->hrdmal, size / sizeof(uint32_t)); |
| 105 | write32(&crypto->ctrl, RK_SETBITS(1 << 3)); /* Set HASH_START */ |
Julius Werner | 33df495 | 2014-12-16 22:48:26 -0800 | [diff] [blame] | 106 | do { |
| 107 | intsts = read32(&crypto->intsts); |
| 108 | if (intsts & HRDMA_ERR) { |
| 109 | printk(BIOS_ERR, "ERROR: DMA error during HW crypto\n"); |
| 110 | return VB2_ERROR_UNKNOWN; |
| 111 | } |
| 112 | } while (!(intsts & HRDMA_DONE)); /* wait for DMA to finish */ |
| 113 | |
| 114 | return VB2_SUCCESS; |
| 115 | } |
| 116 | |
| 117 | int vb2ex_hwcrypto_digest_finalize(uint8_t *digest, uint32_t digest_size) |
| 118 | { |
| 119 | uint32_t *dest = (uint32_t *)digest; |
| 120 | uint32_t *src = crypto->hash_dout; |
| 121 | assert(digest_size == sizeof(crypto->hash_dout)); |
| 122 | |
| 123 | while (!(read32(&crypto->hash_sts) & 0x1)) |
| 124 | /* wait for crypto engine to set HASH_DONE bit */; |
| 125 | |
| 126 | while ((uint8_t *)dest < digest + digest_size) |
| 127 | *dest++ = read32(src++); |
| 128 | |
| 129 | return VB2_SUCCESS; |
| 130 | } |