/* 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; }