diff options
| -rw-r--r-- | drivers/crypto/Kconfig | 9 | ||||
| -rw-r--r-- | drivers/crypto/Makefile | 1 | ||||
| -rw-r--r-- | drivers/crypto/mxc-scc.c | 767 |
3 files changed, 0 insertions, 777 deletions
diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig index 0be55fcc19ba..177b7713bd2d 100644 --- a/drivers/crypto/Kconfig +++ b/drivers/crypto/Kconfig @@ -404,15 +404,6 @@ config CRYPTO_DEV_SAHARA This option enables support for the SAHARA HW crypto accelerator found in some Freescale i.MX chips. -config CRYPTO_DEV_MXC_SCC - tristate "Support for Freescale Security Controller (SCC)" - depends on ARCH_MXC && OF - select CRYPTO_BLKCIPHER - select CRYPTO_DES - help - This option enables support for the Security Controller (SCC) - found in Freescale i.MX25 chips. - config CRYPTO_DEV_EXYNOS_RNG tristate "EXYNOS HW pseudo random number generator support" depends on ARCH_EXYNOS || COMPILE_TEST diff --git a/drivers/crypto/Makefile b/drivers/crypto/Makefile index 8e7e225d2446..a23a7197fcd7 100644 --- a/drivers/crypto/Makefile +++ b/drivers/crypto/Makefile @@ -18,7 +18,6 @@ obj-$(CONFIG_CRYPTO_DEV_IXP4XX) += ixp4xx_crypto.o obj-$(CONFIG_CRYPTO_DEV_MARVELL_CESA) += marvell/ obj-$(CONFIG_CRYPTO_DEV_MEDIATEK) += mediatek/ obj-$(CONFIG_CRYPTO_DEV_MXS_DCP) += mxs-dcp.o -obj-$(CONFIG_CRYPTO_DEV_MXC_SCC) += mxc-scc.o obj-$(CONFIG_CRYPTO_DEV_NIAGARA2) += n2_crypto.o n2_crypto-y := n2_core.o n2_asm.o obj-$(CONFIG_CRYPTO_DEV_NX) += nx/ diff --git a/drivers/crypto/mxc-scc.c b/drivers/crypto/mxc-scc.c deleted file mode 100644 index 519086730791..000000000000 --- a/drivers/crypto/mxc-scc.c +++ /dev/null @@ -1,767 +0,0 @@ -/* - * Copyright (C) 2016 Pengutronix, Steffen Trumtrar <kernel@pengutronix.de> - * - * The driver is based on information gathered from - * drivers/mxc/security/mxc_scc.c which can be found in - * the Freescale linux-2.6-imx.git in the imx_2.6.35_maintain branch. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - */ -#include <linux/clk.h> -#include <linux/crypto.h> -#include <linux/interrupt.h> -#include <linux/io.h> -#include <linux/irq.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/mutex.h> -#include <linux/of.h> -#include <linux/of_device.h> -#include <linux/platform_device.h> - -#include <crypto/algapi.h> -#include <crypto/des.h> - -/* Secure Memory (SCM) registers */ -#define SCC_SCM_RED_START 0x0000 -#define SCC_SCM_BLACK_START 0x0004 -#define SCC_SCM_LENGTH 0x0008 -#define SCC_SCM_CTRL 0x000C -#define SCC_SCM_STATUS 0x0010 -#define SCC_SCM_ERROR_STATUS 0x0014 -#define SCC_SCM_INTR_CTRL 0x0018 -#define SCC_SCM_CFG 0x001C -#define SCC_SCM_INIT_VECTOR_0 0x0020 -#define SCC_SCM_INIT_VECTOR_1 0x0024 -#define SCC_SCM_RED_MEMORY 0x0400 -#define SCC_SCM_BLACK_MEMORY 0x0800 - -/* Security Monitor (SMN) Registers */ -#define SCC_SMN_STATUS 0x1000 -#define SCC_SMN_COMMAND 0x1004 -#define SCC_SMN_SEQ_START 0x1008 -#define SCC_SMN_SEQ_END 0x100C -#define SCC_SMN_SEQ_CHECK 0x1010 -#define SCC_SMN_BIT_COUNT 0x1014 -#define SCC_SMN_BITBANK_INC_SIZE 0x1018 -#define SCC_SMN_BITBANK_DECREMENT 0x101C -#define SCC_SMN_COMPARE_SIZE 0x1020 -#define SCC_SMN_PLAINTEXT_CHECK 0x1024 -#define SCC_SMN_CIPHERTEXT_CHECK 0x1028 -#define SCC_SMN_TIMER_IV 0x102C -#define SCC_SMN_TIMER_CONTROL 0x1030 -#define SCC_SMN_DEBUG_DETECT_STAT 0x1034 -#define SCC_SMN_TIMER 0x1038 - -#define SCC_SCM_CTRL_START_CIPHER BIT(2) -#define SCC_SCM_CTRL_CBC_MODE BIT(1) -#define SCC_SCM_CTRL_DECRYPT_MODE BIT(0) - -#define SCC_SCM_STATUS_LEN_ERR BIT(12) -#define SCC_SCM_STATUS_SMN_UNBLOCKED BIT(11) -#define SCC_SCM_STATUS_CIPHERING_DONE BIT(10) -#define SCC_SCM_STATUS_ZEROIZING_DONE BIT(9) -#define SCC_SCM_STATUS_INTR_STATUS BIT(8) -#define SCC_SCM_STATUS_SEC_KEY BIT(7) -#define SCC_SCM_STATUS_INTERNAL_ERR BIT(6) -#define SCC_SCM_STATUS_BAD_SEC_KEY BIT(5) -#define SCC_SCM_STATUS_ZEROIZE_FAIL BIT(4) -#define SCC_SCM_STATUS_SMN_BLOCKED BIT(3) -#define SCC_SCM_STATUS_CIPHERING BIT(2) -#define SCC_SCM_STATUS_ZEROIZING BIT(1) -#define SCC_SCM_STATUS_BUSY BIT(0) - -#define SCC_SMN_STATUS_STATE_MASK 0x0000001F -#define SCC_SMN_STATE_START 0x0 -/* The SMN is zeroizing its RAM during reset */ -#define SCC_SMN_STATE_ZEROIZE_RAM 0x5 -/* SMN has passed internal checks */ -#define SCC_SMN_STATE_HEALTH_CHECK 0x6 -/* Fatal Security Violation. SMN is locked, SCM is inoperative. */ -#define SCC_SMN_STATE_FAIL 0x9 -/* SCC is in secure state. SCM is using secret key. */ -#define SCC_SMN_STATE_SECURE 0xA -/* SCC is not secure. SCM is using default key. */ -#define SCC_SMN_STATE_NON_SECURE 0xC - -#define SCC_SCM_INTR_CTRL_ZEROIZE_MEM BIT(2) -#define SCC_SCM_INTR_CTRL_CLR_INTR BIT(1) -#define SCC_SCM_INTR_CTRL_MASK_INTR BIT(0) - -/* Size, in blocks, of Red memory. */ -#define SCC_SCM_CFG_BLACK_SIZE_MASK 0x07fe0000 -#define SCC_SCM_CFG_BLACK_SIZE_SHIFT 17 -/* Size, in blocks, of Black memory. */ -#define SCC_SCM_CFG_RED_SIZE_MASK 0x0001ff80 -#define SCC_SCM_CFG_RED_SIZE_SHIFT 7 -/* Number of bytes per block. */ -#define SCC_SCM_CFG_BLOCK_SIZE_MASK 0x0000007f - -#define SCC_SMN_COMMAND_TAMPER_LOCK BIT(4) -#define SCC_SMN_COMMAND_CLR_INTR BIT(3) -#define SCC_SMN_COMMAND_CLR_BIT_BANK BIT(2) -#define SCC_SMN_COMMAND_EN_INTR BIT(1) -#define SCC_SMN_COMMAND_SET_SOFTWARE_ALARM BIT(0) - -#define SCC_KEY_SLOTS 20 -#define SCC_MAX_KEY_SIZE 32 -#define SCC_KEY_SLOT_SIZE 32 - -#define SCC_CRC_CCITT_START 0xFFFF - -/* - * Offset into each RAM of the base of the area which is not - * used for Stored Keys. - */ -#define SCC_NON_RESERVED_OFFSET (SCC_KEY_SLOTS * SCC_KEY_SLOT_SIZE) - -/* Fixed padding for appending to plaintext to fill out a block */ -static char scc_block_padding[8] = { 0x80, 0, 0, 0, 0, 0, 0, 0 }; - -enum mxc_scc_state { - SCC_STATE_OK, - SCC_STATE_UNIMPLEMENTED, - SCC_STATE_FAILED -}; - -struct mxc_scc { - struct device *dev; - void __iomem *base; - struct clk *clk; - bool hw_busy; - spinlock_t lock; - struct crypto_queue queue; - struct crypto_async_request *req; - int block_size_bytes; - int black_ram_size_blocks; - int memory_size_bytes; - int bytes_remaining; - - void __iomem *red_memory; - void __iomem *black_memory; -}; - -struct mxc_scc_ctx { - struct mxc_scc *scc; - struct scatterlist *sg_src; - size_t src_nents; - struct scatterlist *sg_dst; - size_t dst_nents; - unsigned int offset; - unsigned int size; - unsigned int ctrl; -}; - -struct mxc_scc_crypto_tmpl { - struct mxc_scc *scc; - struct crypto_alg alg; -}; - -static int mxc_scc_get_data(struct mxc_scc_ctx *ctx, - struct crypto_async_request *req) -{ - struct ablkcipher_request *ablkreq = ablkcipher_request_cast(req); - struct mxc_scc *scc = ctx->scc; - size_t len; - void __iomem *from; - - if (ctx->ctrl & SCC_SCM_CTRL_DECRYPT_MODE) - from = scc->red_memory; - else - from = scc->black_memory; - - dev_dbg(scc->dev, "pcopy: from 0x%p %zu bytes\n", from, - ctx->dst_nents * 8); - len = sg_pcopy_from_buffer(ablkreq->dst, ctx->dst_nents, - from, ctx->size, ctx->offset); - if (!len) { - dev_err(scc->dev, "pcopy err from 0x%p (len=%zu)\n", from, len); - return -EINVAL; - } - -#ifdef DEBUG - print_hex_dump(KERN_ERR, - "red memory@"__stringify(__LINE__)": ", - DUMP_PREFIX_ADDRESS, 16, 4, - scc->red_memory, ctx->size, 1); - print_hex_dump(KERN_ERR, - "black memory@"__stringify(__LINE__)": ", - DUMP_PREFIX_ADDRESS, 16, 4, - scc->black_memory, ctx->size, 1); -#endif - - ctx->offset += len; - - if (ctx->offset < ablkreq->nbytes) - return -EINPROGRESS; - - return 0; -} - -static int mxc_scc_ablkcipher_req_init(struct ablkcipher_request *req, - struct mxc_scc_ctx *ctx) -{ - struct mxc_scc *scc = ctx->scc; - int nents; - - nents = sg_nents_for_len(req->src, req->nbytes); - if (nents < 0) { - dev_err(scc->dev, "Invalid number of src SC"); - return nents; - } - ctx->src_nents = nents; - - nents = sg_nents_for_len(req->dst, req->nbytes); - if (nents < 0) { - dev_err(scc->dev, "Invalid number of dst SC"); - return nents; - } - ctx->dst_nents = nents; - - ctx->size = 0; - ctx->offset = 0; - - return 0; -} - -static int mxc_scc_ablkcipher_req_complete(struct crypto_async_request *req, - struct mxc_scc_ctx *ctx, - int result) -{ - struct ablkcipher_request *ablkreq = ablkcipher_request_cast(req); - struct mxc_scc *scc = ctx->scc; - - scc->req = NULL; - scc->bytes_remaining = scc->memory_size_bytes; - - if (ctx->ctrl & SCC_SCM_CTRL_CBC_MODE) - memcpy(ablkreq->info, scc->base + SCC_SCM_INIT_VECTOR_0, - scc->block_size_bytes); - - req->complete(req, result); - scc->hw_busy = false; - - return 0; -} - -static int mxc_scc_put_data(struct mxc_scc_ctx *ctx, - struct ablkcipher_request *req) -{ - u8 padding_buffer[sizeof(u16) + sizeof(scc_block_padding)]; - size_t len = min_t(size_t, req->nbytes - ctx->offset, - ctx->scc->bytes_remaining); - unsigned int padding_byte_count = 0; - struct mxc_scc *scc = ctx->scc; - void __iomem *to; - - if (ctx->ctrl & SCC_SCM_CTRL_DECRYPT_MODE) - to = scc->black_memory; - else - to = scc->red_memory; - - if (ctx->ctrl & SCC_SCM_CTRL_CBC_MODE && req->info) - memcpy(scc->base + SCC_SCM_INIT_VECTOR_0, req->info, - scc->block_size_bytes); - - len = sg_pcopy_to_buffer(req->src, ctx->src_nents, - to, len, ctx->offset); - if (!len) { - dev_err(scc->dev, "pcopy err to 0x%p (len=%zu)\n", to, len); - return -EINVAL; - } - - ctx->size = len; - -#ifdef DEBUG - dev_dbg(scc->dev, "copied %d bytes to 0x%p\n", len, to); - print_hex_dump(KERN_ERR, - "init vector0@"__stringify(__LINE__)": ", - DUMP_PREFIX_ADDRESS, 16, 4, - scc->base + SCC_SCM_INIT_VECTOR_0, scc->block_size_bytes, - 1); - print_hex_dump(KERN_ERR, - "red memory@"__stringify(__LINE__)": ", - DUMP_PREFIX_ADDRESS, 16, 4, - scc->red_memory, ctx->size, 1); - print_hex_dump(KERN_ERR, - "black memory@"__stringify(__LINE__)": ", - DUMP_PREFIX_ADDRESS, 16, 4, - scc->black_memory, ctx->size, 1); -#endif - - scc->bytes_remaining -= len; - - padding_byte_count = len % scc->block_size_bytes; - - if (padding_byte_count) { - memcpy(padding_buffer, scc_block_padding, padding_byte_count); - memcpy(to + len, padding_buffer, padding_byte_count); - ctx->size += padding_byte_count; - } - -#ifdef DEBUG - print_hex_dump(KERN_ERR, - "data to encrypt@"__stringify(__LINE__)": ", - DUMP_PREFIX_ADDRESS, 16, 4, - to, ctx->size, 1); -#endif - - return 0; -} - -static void mxc_scc_ablkcipher_next(struct mxc_scc_ctx *ctx, - struct crypto_async_request *req) -{ - struct ablkcipher_request *ablkreq = ablkcipher_request_cast(req); - struct mxc_scc *scc = ctx->scc; - int err; - - dev_dbg(scc->dev, "dispatch request (nbytes=%d, src=%p, dst=%p)\n", - ablkreq->nbytes, ablkreq->src, ablkreq->dst); - - writel(0, scc->base + SCC_SCM_ERROR_STATUS); - - err = mxc_scc_put_data(ctx, ablkreq); - if (err) { - mxc_scc_ablkcipher_req_complete(req, ctx, err); - return; - } - - dev_dbg(scc->dev, "Start encryption (0x%x/0x%x)\n", - readl(scc->base + SCC_SCM_RED_START), - readl(scc->base + SCC_SCM_BLACK_START)); - - /* clear interrupt control registers */ - writel(SCC_SCM_INTR_CTRL_CLR_INTR, - scc->base + SCC_SCM_INTR_CTRL); - - writel((ctx->size / ctx->scc->block_size_bytes) - 1, - scc->base + SCC_SCM_LENGTH); - - dev_dbg(scc->dev, "Process %d block(s) in 0x%p\n", - ctx->size / ctx->scc->block_size_bytes, - (ctx->ctrl & SCC_SCM_CTRL_DECRYPT_MODE) ? scc->black_memory : - scc->red_memory); - - writel(ctx->ctrl, scc->base + SCC_SCM_CTRL); -} - -static irqreturn_t mxc_scc_int(int irq, void *priv) -{ - struct crypto_async_request *req; - struct mxc_scc_ctx *ctx; - struct mxc_scc *scc = priv; - int status; - int ret; - - status = readl(scc->base + SCC_SCM_STATUS); - - /* clear interrupt control registers */ - writel(SCC_SCM_INTR_CTRL_CLR_INTR, scc->base + SCC_SCM_INTR_CTRL); - - if (status & SCC_SCM_STATUS_BUSY) - return IRQ_NONE; - - req = scc->req; - if (req) { - ctx = crypto_tfm_ctx(req->tfm); - ret = mxc_scc_get_data(ctx, req); - if (ret != -EINPROGRESS) - mxc_scc_ablkcipher_req_complete(req, ctx, ret); - else - mxc_scc_ablkcipher_next(ctx, req); - } - - return IRQ_HANDLED; -} - -static int mxc_scc_cra_init(struct crypto_tfm *tfm) -{ - struct mxc_scc_ctx *ctx = crypto_tfm_ctx(tfm); - struct crypto_alg *alg = tfm->__crt_alg; - struct mxc_scc_crypto_tmpl *algt; - - algt = container_of(alg, struct mxc_scc_crypto_tmpl, alg); - - ctx->scc = algt->scc; - return 0; -} - -static void mxc_scc_dequeue_req_unlocked(struct mxc_scc_ctx *ctx) -{ - struct crypto_async_request *req, *backlog; - - if (ctx->scc->hw_busy) - return; - - spin_lock_bh(&ctx->scc->lock); - backlog = crypto_get_backlog(&ctx->scc->queue); - req = crypto_dequeue_request(&ctx->scc->queue); - ctx->scc->req = req; - ctx->scc->hw_busy = true; - spin_unlock_bh(&ctx->scc->lock); - - if (!req) - return; - - if (backlog) - backlog->complete(backlog, -EINPROGRESS); - - mxc_scc_ablkcipher_next(ctx, req); -} - -static int mxc_scc_queue_req(struct mxc_scc_ctx *ctx, - struct crypto_async_request *req) -{ - int ret; - - spin_lock_bh(&ctx->scc->lock); - ret = crypto_enqueue_request(&ctx->scc->queue, req); - spin_unlock_bh(&ctx->scc->lock); - - if (ret != -EINPROGRESS) - return ret; - - mxc_scc_dequeue_req_unlocked(ctx); - - return -EINPROGRESS; -} - -static int mxc_scc_des3_op(struct mxc_scc_ctx *ctx, - struct ablkcipher_request *req) -{ - int err; - - err = mxc_scc_ablkcipher_req_init(req, ctx); - if (err) - return err; - - return mxc_scc_queue_req(ctx, &req->base); -} - -static int mxc_scc_ecb_des_encrypt(struct ablkcipher_request *req) -{ - struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(req); - struct mxc_scc_ctx *ctx = crypto_ablkcipher_ctx(cipher); - - ctx->ctrl = SCC_SCM_CTRL_START_CIPHER; - - return mxc_scc_des3_op(ctx, req); -} - -static int mxc_scc_ecb_des_decrypt(struct ablkcipher_request *req) -{ - struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(req); - struct mxc_scc_ctx *ctx = crypto_ablkcipher_ctx(cipher); - - ctx->ctrl = SCC_SCM_CTRL_START_CIPHER; - ctx->ctrl |= SCC_SCM_CTRL_DECRYPT_MODE; - - return mxc_scc_des3_op(ctx, req); -} - -static int mxc_scc_cbc_des_encrypt(struct ablkcipher_request *req) -{ - struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(req); - struct mxc_scc_ctx *ctx = crypto_ablkcipher_ctx(cipher); - - ctx->ctrl = SCC_SCM_CTRL_START_CIPHER; - ctx->ctrl |= SCC_SCM_CTRL_CBC_MODE; - - return mxc_scc_des3_op(ctx, req); -} - -static int mxc_scc_cbc_des_decrypt(struct ablkcipher_request *req) -{ - struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(req); - struct mxc_scc_ctx *ctx = crypto_ablkcipher_ctx(cipher); - - ctx->ctrl = SCC_SCM_CTRL_START_CIPHER; - ctx->ctrl |= SCC_SCM_CTRL_CBC_MODE; - ctx->ctrl |= SCC_SCM_CTRL_DECRYPT_MODE; - - return mxc_scc_des3_op(ctx, req); -} - -static void mxc_scc_hw_init(struct mxc_scc *scc) -{ - int offset; - - offset = SCC_NON_RESERVED_OFFSET / scc->block_size_bytes; - - /* Fill the RED_START register */ - writel(offset, scc->base + SCC_SCM_RED_START); - - /* Fill the BLACK_START register */ - writel(offset, scc->base + SCC_SCM_BLACK_START); - - scc->red_memory = scc->base + SCC_SCM_RED_MEMORY + - SCC_NON_RESERVED_OFFSET; - - scc->black_memory = scc->base + SCC_SCM_BLACK_MEMORY + - SCC_NON_RESERVED_OFFSET; - - scc->bytes_remaining = scc->memory_size_bytes; -} - -static int mxc_scc_get_config(struct mxc_scc *scc) -{ - int config; - - config = readl(scc->base + SCC_SCM_CFG); - - scc->block_size_bytes = config & SCC_SCM_CFG_BLOCK_SIZE_MASK; - - scc->black_ram_size_blocks = config & SCC_SCM_CFG_BLACK_SIZE_MASK; - - scc->memory_size_bytes = (scc->block_size_bytes * - scc->black_ram_size_blocks) - - SCC_NON_RESERVED_OFFSET; - - return 0; -} - -static enum mxc_scc_state mxc_scc_get_state(struct mxc_scc *scc) -{ - enum mxc_scc_state state; - int status; - - status = readl(scc->base + SCC_SMN_STATUS) & - SCC_SMN_STATUS_STATE_MASK; - - /* If in Health Check, try to bringup to secure state */ - if (status & SCC_SMN_STATE_HEALTH_CHECK) { - /* - * Write a simple algorithm to the Algorithm Sequence - * Checker (ASC) - */ - writel(0xaaaa, scc->base + SCC_SMN_SEQ_START); - writel(0x5555, scc->base + SCC_SMN_SEQ_END); - writel(0x5555, scc->base + SCC_SMN_SEQ_CHECK); - - status = readl(scc->base + SCC_SMN_STATUS) & - SCC_SMN_STATUS_STATE_MASK; - } - - switch (status) { - case SCC_SMN_STATE_NON_SECURE: - case SCC_SMN_STATE_SECURE: - state = SCC_STATE_OK; - break; - case SCC_SMN_STATE_FAIL: - state = SCC_STATE_FAILED; - break; - default: - state = SCC_STATE_UNIMPLEMENTED; - break; - } - - return state; -} - -static struct mxc_scc_crypto_tmpl scc_ecb_des = { - .alg = { - .cra_name = "ecb(des3_ede)", - .cra_driver_name = "ecb-des3-scc", - .cra_priority = 300, - .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER, - .cra_blocksize = DES3_EDE_BLOCK_SIZE, - .cra_ctxsize = sizeof(struct mxc_scc_ctx), - .cra_alignmask = 0, - .cra_type = &crypto_ablkcipher_type, - .cra_module = THIS_MODULE, - .cra_init = mxc_scc_cra_init, - .cra_u.ablkcipher = { - .min_keysize = DES3_EDE_KEY_SIZE, - .max_keysize = DES3_EDE_KEY_SIZE, - .encrypt = mxc_scc_ecb_des_encrypt, - .decrypt = mxc_scc_ecb_des_decrypt, - } - } -}; - -static struct mxc_scc_crypto_tmpl scc_cbc_des = { - .alg = { - .cra_name = "cbc(des3_ede)", - .cra_driver_name = "cbc-des3-scc", - .cra_priority = 300, - .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER, - .cra_blocksize = DES3_EDE_BLOCK_SIZE, - .cra_ctxsize = sizeof(struct mxc_scc_ctx), - .cra_alignmask = 0, - .cra_type = &crypto_ablkcipher_type, - .cra_module = THIS_MODULE, - .cra_init = mxc_scc_cra_init, - .cra_u.ablkcipher = { - .min_keysize = DES3_EDE_KEY_SIZE, - .max_keysize = DES3_EDE_KEY_SIZE, - .encrypt = mxc_scc_cbc_des_encrypt, - .decrypt = mxc_scc_cbc_des_decrypt, - } - } -}; - -static struct mxc_scc_crypto_tmpl *scc_crypto_algs[] = { - &scc_ecb_des, - &scc_cbc_des, -}; - -static int mxc_scc_crypto_register(struct mxc_scc *scc) -{ - int i; - int err = 0; - - for (i = 0; i < ARRAY_SIZE(scc_crypto_algs); i++) { - scc_crypto_algs[i]->scc = scc; - err = crypto_register_alg(&scc_crypto_algs[i]->alg); - if (err) - goto err_out; - } - - return 0; - -err_out: - while (--i >= 0) - crypto_unregister_alg(&scc_crypto_algs[i]->alg); - - return err; -} - -static void mxc_scc_crypto_unregister(void) -{ - unsigned int i; - - for (i = 0; i < ARRAY_SIZE(scc_crypto_algs); i++) - crypto_unregister_alg(&scc_crypto_algs[i]->alg); -} - -static int mxc_scc_probe(struct platform_device *pdev) -{ - struct device *dev = &pdev->dev; - struct resource *res; - struct mxc_scc *scc; - enum mxc_scc_state state; - int irq; - int ret; - int i; - - scc = devm_kzalloc(dev, sizeof(*scc), GFP_KERNEL); - if (!scc) - return -ENOMEM; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - scc->base = devm_ioremap_resource(dev, res); - if (IS_ERR(scc->base)) - return PTR_ERR(scc->base); - - scc->clk = devm_clk_get(&pdev->dev, "ipg"); - if (IS_ERR(scc->clk)) { - dev_err(dev, "Could not get ipg clock\n"); - return PTR_ERR(scc->clk); - } - - ret = clk_prepare_enable(scc->clk); - if (ret) - return ret; - - /* clear error status register */ - writel(0x0, scc->base + SCC_SCM_ERROR_STATUS); - - /* clear interrupt control registers */ - writel(SCC_SCM_INTR_CTRL_CLR_INTR | - SCC_SCM_INTR_CTRL_MASK_INTR, - scc->base + SCC_SCM_INTR_CTRL); - - writel(SCC_SMN_COMMAND_CLR_INTR | - SCC_SMN_COMMAND_EN_INTR, - scc->base + SCC_SMN_COMMAND); - - scc->dev = dev; - platform_set_drvdata(pdev, scc); - - ret = mxc_scc_get_config(scc); - if (ret) - goto err_out; - - state = mxc_scc_get_state(scc); - - if (state != SCC_STATE_OK) { - dev_err(dev, "SCC in unusable state %d\n", state); - ret = -EINVAL; - goto err_out; - } - - mxc_scc_hw_init(scc); - - spin_lock_init(&scc->lock); - /* FIXME: calculate queue from RAM slots */ - crypto_init_queue(&scc->queue, 50); - - for (i = 0; i < 2; i++) { - irq = platform_get_irq(pdev, i); - if (irq < 0) { - dev_err(dev, "failed to get irq resource: %d\n", irq); - ret = irq; - goto err_out; - } - - ret = devm_request_threaded_irq(dev, irq, NULL, mxc_scc_int, - IRQF_ONESHOT, dev_name(dev), scc); - if (ret) - goto err_out; - } - - ret = mxc_scc_crypto_register(scc); - if (ret) { - dev_err(dev, "could not register algorithms"); - goto err_out; - } - - dev_info(dev, "registered successfully.\n"); - - return 0; - -err_out: - clk_disable_unprepare(scc->clk); - - return ret; -} - -static int mxc_scc_remove(struct platform_device *pdev) -{ - struct mxc_scc *scc = platform_get_drvdata(pdev); - - mxc_scc_crypto_unregister(); - - clk_disable_unprepare(scc->clk); - - return 0; -} - -static const struct of_device_id mxc_scc_dt_ids[] = { - { .compatible = "fsl,imx25-scc", .data = NULL, }, - { /* sentinel */ } -}; -MODULE_DEVICE_TABLE(of, mxc_scc_dt_ids); - -static struct platform_driver mxc_scc_driver = { - .probe = mxc_scc_probe, - .remove = mxc_scc_remove, - .driver = { - .name = "mxc-scc", - .of_match_table = mxc_scc_dt_ids, - }, -}; - -module_platform_driver(mxc_scc_driver); -MODULE_AUTHOR("Steffen Trumtrar <kernel@pengutronix.de>"); -MODULE_DESCRIPTION("Freescale i.MX25 SCC Crypto driver"); -MODULE_LICENSE("GPL v2"); |