| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <device/mmio.h> |
| #include <assert.h> |
| #include <console/console.h> |
| #include <delay.h> |
| #include <soc/addressmap.h> |
| #include <soc/soc.h> |
| #include <types.h> |
| #include <vb2_api.h> |
| |
| enum rk3288_crypto_interrupt_bits { |
| PKA_DONE = 1 << 5, |
| HASH_DONE = 1 << 4, |
| HRDMA_ERR = 1 << 3, |
| HRDMA_DONE = 1 << 2, |
| BCDMA_ERR = 1 << 1, |
| BCDMA_DONE = 1 << 0, |
| }; |
| |
| struct rk3288_crypto { |
| u32 intsts; |
| u32 intena; |
| u32 ctrl; |
| u32 conf; |
| u32 brdmas; |
| u32 btdmas; |
| u32 btdmal; |
| u32 hrdmas; |
| u32 hrdmal; |
| u8 _res0[0x80 - 0x24]; |
| u32 aes_ctrl; |
| u32 aes_sts; |
| u32 aes_din[4]; |
| u32 aes_dout[4]; |
| u32 aes_iv[4]; |
| u32 aes_key[8]; |
| u32 aes_cnt[4]; |
| u8 _res1[0x100 - 0xe8]; |
| u32 tdes_ctrl; |
| u32 tdes_sts; |
| u32 tdes_din[2]; |
| u32 tdes_dout[2]; |
| u32 tdes_iv[2]; |
| u32 tdes_key[3][2]; |
| u8 _res2[0x180 - 0x138]; |
| u32 hash_ctrl; |
| u32 hash_sts; |
| u32 hash_msg_len; |
| u32 hash_dout[8]; |
| u32 hash_seed[5]; |
| u8 _res3[0x200 - 0x1c0]; |
| u32 trng_ctrl; |
| u32 trng_dout[8]; |
| } *crypto = (void *)CRYPTO_BASE; |
| check_member(rk3288_crypto, trng_dout[7], 0x220); |
| |
| vb2_error_t vb2ex_hwcrypto_digest_init(enum vb2_hash_algorithm hash_alg, |
| uint32_t data_size) |
| { |
| if (hash_alg != VB2_HASH_SHA256 || !data_size) |
| return VB2_ERROR_EX_HWCRYPTO_UNSUPPORTED; |
| |
| write32(&crypto->ctrl, RK_SETBITS(1 << 6)); /* Assert HASH_FLUSH */ |
| udelay(1); /* for 10+ cycles to */ |
| write32(&crypto->ctrl, RK_CLRBITS(1 << 6)); /* clear out old hash */ |
| |
| /* Enable DMA byte swapping for little-endian bus (Byteswap_??FIFO) */ |
| write32(&crypto->conf, 1 << 5 | 1 << 4 | 1 << 3); |
| |
| write32(&crypto->intena, HRDMA_ERR | HRDMA_DONE); /* enable interrupt */ |
| |
| write32(&crypto->hash_msg_len, data_size); /* program total size */ |
| write32(&crypto->hash_ctrl, 1 << 3 | 0x2); /* swap DOUT, SHA256 */ |
| |
| printk(BIOS_DEBUG, "Initialized RK3288 HW crypto for %u byte SHA256\n", |
| data_size); |
| return VB2_SUCCESS; |
| } |
| |
| vb2_error_t vb2ex_hwcrypto_digest_extend(const uint8_t *buf, uint32_t size) |
| { |
| uint32_t intsts; |
| |
| write32(&crypto->intsts, HRDMA_ERR | HRDMA_DONE); /* clear interrupts */ |
| |
| /* NOTE: This assumes that the DMA is reading from uncached SRAM. */ |
| write32(&crypto->hrdmas, (uint32_t)buf); |
| write32(&crypto->hrdmal, size / sizeof(uint32_t)); |
| write32(&crypto->ctrl, RK_SETBITS(1 << 3)); /* Set HASH_START */ |
| do { |
| intsts = read32(&crypto->intsts); |
| if (intsts & HRDMA_ERR) { |
| printk(BIOS_ERR, "DMA error during HW crypto\n"); |
| return VB2_ERROR_UNKNOWN; |
| } |
| } while (!(intsts & HRDMA_DONE)); /* wait for DMA to finish */ |
| |
| return VB2_SUCCESS; |
| } |
| |
| vb2_error_t vb2ex_hwcrypto_digest_finalize(uint8_t *digest, |
| uint32_t digest_size) |
| { |
| uint32_t *dest = (uint32_t *)digest; |
| uint32_t *src = crypto->hash_dout; |
| assert(digest_size == sizeof(crypto->hash_dout)); |
| |
| while (!(read32(&crypto->hash_sts) & 0x1)) |
| /* wait for crypto engine to set HASH_DONE bit */; |
| |
| while ((uint8_t *)dest < digest + digest_size) |
| *dest++ = read32(src++); |
| |
| return VB2_SUCCESS; |
| } |