crypto: mxc-scc - Remove broken driver

This driver has been completely broken since the very beginning
because it doesn't even have a setkey function.  This means that
nobody has ever used it as it would crash during setkey.

This patch removes this driver.

Fixes: d293b640ebd5 ("crypto: mxc-scc - add basic driver for the...")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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");