crypto: bfin_crc - remove blackfin CRC driver

The blackfin architecture is getting removed, so this
driver won't be used any more.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

4 files changed, 0 insertions, 885 deletions

diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig
index 5c4106979cc9..d1ea1a07cecb 100644
--- a/drivers/crypto/Kconfig
+++ b/drivers/crypto/Kconfig
@@ -464,13 +464,6 @@ if CRYPTO_DEV_UX500
 	source "drivers/crypto/ux500/Kconfig"
 endif # if CRYPTO_DEV_UX500
 
-config CRYPTO_DEV_BFIN_CRC
-	tristate "Support for Blackfin CRC hardware"
-	depends on BF60x
-	help
-	  Newer Blackfin processors have CRC hardware. Select this if you
-	  want to use the Blackfin CRC module.
-
 config CRYPTO_DEV_ATMEL_AUTHENC
 	tristate "Support for Atmel IPSEC/SSL hw accelerator"
 	depends on HAS_DMA
diff --git a/drivers/crypto/Makefile b/drivers/crypto/Makefile
index ee5ec5c94383..7ae87b4f6c8d 100644
--- a/drivers/crypto/Makefile
+++ b/drivers/crypto/Makefile
@@ -3,7 +3,6 @@ obj-$(CONFIG_CRYPTO_DEV_ATMEL_AES) += atmel-aes.o
 obj-$(CONFIG_CRYPTO_DEV_ATMEL_SHA) += atmel-sha.o
 obj-$(CONFIG_CRYPTO_DEV_ATMEL_TDES) += atmel-tdes.o
 obj-$(CONFIG_CRYPTO_DEV_ATMEL_ECC) += atmel-ecc.o
-obj-$(CONFIG_CRYPTO_DEV_BFIN_CRC) += bfin_crc.o
 obj-$(CONFIG_CRYPTO_DEV_CAVIUM_ZIP) += cavium/
 obj-$(CONFIG_CRYPTO_DEV_CCP) += ccp/
 obj-$(CONFIG_CRYPTO_DEV_CCREE) += ccree/
diff --git a/drivers/crypto/bfin_crc.c b/drivers/crypto/bfin_crc.c
deleted file mode 100644
index cfc4d682d55a..000000000000
--- a/drivers/crypto/bfin_crc.c
+++ /dev/null
@@ -1,753 +0,0 @@
-/*
- * Cryptographic API.
- *
- * Support Blackfin CRC HW acceleration.
- *
- * Copyright 2012 Analog Devices Inc.
- *
- * Licensed under the GPL-2.
- */
-
-#include <linux/err.h>
-#include <linux/device.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/errno.h>
-#include <linux/interrupt.h>
-#include <linux/kernel.h>
-#include <linux/irq.h>
-#include <linux/io.h>
-#include <linux/platform_device.h>
-#include <linux/scatterlist.h>
-#include <linux/dma-mapping.h>
-#include <linux/delay.h>
-#include <linux/crypto.h>
-#include <linux/cryptohash.h>
-#include <crypto/scatterwalk.h>
-#include <crypto/algapi.h>
-#include <crypto/hash.h>
-#include <crypto/internal/hash.h>
-#include <asm/unaligned.h>
-
-#include <asm/dma.h>
-#include <asm/portmux.h>
-#include <asm/io.h>
-
-#include "bfin_crc.h"
-
-#define CRC_CCRYPTO_QUEUE_LENGTH	5
-
-#define DRIVER_NAME "bfin-hmac-crc"
-#define CHKSUM_DIGEST_SIZE      4
-#define CHKSUM_BLOCK_SIZE       1
-
-#define CRC_MAX_DMA_DESC	100
-
-#define CRC_CRYPTO_STATE_UPDATE		1
-#define CRC_CRYPTO_STATE_FINALUPDATE	2
-#define CRC_CRYPTO_STATE_FINISH		3
-
-struct bfin_crypto_crc {
-	struct list_head	list;
-	struct device		*dev;
-	spinlock_t		lock;
-
-	int			irq;
-	int			dma_ch;
-	u32			poly;
-	struct crc_register	*regs;
-
-	struct ahash_request	*req; /* current request in operation */
-	struct dma_desc_array	*sg_cpu; /* virt addr of sg dma descriptors */
-	dma_addr_t		sg_dma; /* phy addr of sg dma descriptors */
-	u8			*sg_mid_buf;
-	dma_addr_t		sg_mid_dma; /* phy addr of sg mid buffer */
-
-	struct tasklet_struct	done_task;
-	struct crypto_queue	queue; /* waiting requests */
-
-	u8			busy:1; /* crc device in operation flag */
-};
-
-static struct bfin_crypto_crc_list {
-	struct list_head	dev_list;
-	spinlock_t		lock;
-} crc_list;
-
-struct bfin_crypto_crc_reqctx {
-	struct bfin_crypto_crc	*crc;
-
-	unsigned int		total;	/* total request bytes */
-	size_t			sg_buflen; /* bytes for this update */
-	unsigned int		sg_nents;
-	struct scatterlist	*sg; /* sg list head for this update*/
-	struct scatterlist	bufsl[2]; /* chained sg list */
-
-	size_t			bufnext_len;
-	size_t			buflast_len;
-	u8			bufnext[CHKSUM_DIGEST_SIZE]; /* extra bytes for next udpate */
-	u8			buflast[CHKSUM_DIGEST_SIZE]; /* extra bytes from last udpate */
-
-	u8			flag;
-};
-
-struct bfin_crypto_crc_ctx {
-	struct bfin_crypto_crc	*crc;
-	u32			key;
-};
-
-/*
- * get element in scatter list by given index
- */
-static struct scatterlist *sg_get(struct scatterlist *sg_list, unsigned int nents,
-				unsigned int index)
-{
-	struct scatterlist *sg = NULL;
-	int i;
-
-	for_each_sg(sg_list, sg, nents, i)
-		if (i == index)
-			break;
-
-	return sg;
-}
-
-static int bfin_crypto_crc_init_hw(struct bfin_crypto_crc *crc, u32 key)
-{
-	writel(0, &crc->regs->datacntrld);
-	writel(MODE_CALC_CRC << OPMODE_OFFSET, &crc->regs->control);
-	writel(key, &crc->regs->curresult);
-
-	/* setup CRC interrupts */
-	writel(CMPERRI | DCNTEXPI, &crc->regs->status);
-	writel(CMPERRI | DCNTEXPI, &crc->regs->intrenset);
-
-	return 0;
-}
-
-static int bfin_crypto_crc_init(struct ahash_request *req)
-{
-	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
-	struct bfin_crypto_crc_ctx *crc_ctx = crypto_ahash_ctx(tfm);
-	struct bfin_crypto_crc_reqctx *ctx = ahash_request_ctx(req);
-	struct bfin_crypto_crc *crc;
-
-	dev_dbg(ctx->crc->dev, "crc_init\n");
-	spin_lock_bh(&crc_list.lock);
-	list_for_each_entry(crc, &crc_list.dev_list, list) {
-		crc_ctx->crc = crc;
-		break;
-	}
-	spin_unlock_bh(&crc_list.lock);
-
-	if (sg_nents(req->src) > CRC_MAX_DMA_DESC) {
-		dev_dbg(ctx->crc->dev, "init: requested sg list is too big > %d\n",
-			CRC_MAX_DMA_DESC);
-		return -EINVAL;
-	}
-
-	ctx->crc = crc;
-	ctx->bufnext_len = 0;
-	ctx->buflast_len = 0;
-	ctx->sg_buflen = 0;
-	ctx->total = 0;
-	ctx->flag = 0;
-
-	/* init crc results */
-	put_unaligned_le32(crc_ctx->key, req->result);
-
-	dev_dbg(ctx->crc->dev, "init: digest size: %d\n",
-		crypto_ahash_digestsize(tfm));
-
-	return bfin_crypto_crc_init_hw(crc, crc_ctx->key);
-}
-
-static void bfin_crypto_crc_config_dma(struct bfin_crypto_crc *crc)
-{
-	struct scatterlist *sg;
-	struct bfin_crypto_crc_reqctx *ctx = ahash_request_ctx(crc->req);
-	int i = 0, j = 0;
-	unsigned long dma_config;
-	unsigned int dma_count;
-	unsigned int dma_addr;
-	unsigned int mid_dma_count = 0;
-	int dma_mod;
-
-	dma_map_sg(crc->dev, ctx->sg, ctx->sg_nents, DMA_TO_DEVICE);
-
-	for_each_sg(ctx->sg, sg, ctx->sg_nents, j) {
-		dma_addr = sg_dma_address(sg);
-		/* deduce extra bytes in last sg */
-		if (sg_is_last(sg))
-			dma_count = sg_dma_len(sg) - ctx->bufnext_len;
-		else
-			dma_count = sg_dma_len(sg);
-
-		if (mid_dma_count) {
-			/* Append last middle dma buffer to 4 bytes with first
-			   bytes in current sg buffer. Move addr of current
-			   sg and deduce the length of current sg.
-			 */
-			memcpy(crc->sg_mid_buf +(i << 2) + mid_dma_count,
-				sg_virt(sg),
-				CHKSUM_DIGEST_SIZE - mid_dma_count);
-			dma_addr += CHKSUM_DIGEST_SIZE - mid_dma_count;
-			dma_count -= CHKSUM_DIGEST_SIZE - mid_dma_count;
-
-			dma_config = DMAFLOW_ARRAY | RESTART | NDSIZE_3 |
-				DMAEN | PSIZE_32 | WDSIZE_32;
-
-			/* setup new dma descriptor for next middle dma */
-			crc->sg_cpu[i].start_addr = crc->sg_mid_dma + (i << 2);
-			crc->sg_cpu[i].cfg = dma_config;
-			crc->sg_cpu[i].x_count = 1;
-			crc->sg_cpu[i].x_modify = CHKSUM_DIGEST_SIZE;
-			dev_dbg(crc->dev, "%d: crc_dma: start_addr:0x%lx, "
-				"cfg:0x%x, x_count:0x%x, x_modify:0x%x\n",
-				i, crc->sg_cpu[i].start_addr,
-				crc->sg_cpu[i].cfg, crc->sg_cpu[i].x_count,
-				crc->sg_cpu[i].x_modify);
-			i++;
-		}
-
-		dma_config = DMAFLOW_ARRAY | RESTART | NDSIZE_3 | DMAEN | PSIZE_32;
-		/* chop current sg dma len to multiple of 32 bits */
-		mid_dma_count = dma_count % 4;
-		dma_count &= ~0x3;
-
-		if (dma_addr % 4 == 0) {
-			dma_config |= WDSIZE_32;
-			dma_count >>= 2;
-			dma_mod = 4;
-		} else if (dma_addr % 2 == 0) {
-			dma_config |= WDSIZE_16;
-			dma_count >>= 1;
-			dma_mod = 2;
-		} else {
-			dma_config |= WDSIZE_8;
-			dma_mod = 1;
-		}
-
-		crc->sg_cpu[i].start_addr = dma_addr;
-		crc->sg_cpu[i].cfg = dma_config;
-		crc->sg_cpu[i].x_count = dma_count;
-		crc->sg_cpu[i].x_modify = dma_mod;
-		dev_dbg(crc->dev, "%d: crc_dma: start_addr:0x%lx, "
-			"cfg:0x%x, x_count:0x%x, x_modify:0x%x\n",
-			i, crc->sg_cpu[i].start_addr,
-			crc->sg_cpu[i].cfg, crc->sg_cpu[i].x_count,
-			crc->sg_cpu[i].x_modify);
-		i++;
-
-		if (mid_dma_count) {
-			/* copy extra bytes to next middle dma buffer */
-			memcpy(crc->sg_mid_buf + (i << 2),
-				(u8*)sg_virt(sg) + (dma_count << 2),
-				mid_dma_count);
-		}
-	}
-
-	dma_config = DMAFLOW_ARRAY | RESTART | NDSIZE_3 | DMAEN | PSIZE_32 | WDSIZE_32;
-	/* For final update req, append the buffer for next update as well*/
-	if (ctx->bufnext_len && (ctx->flag == CRC_CRYPTO_STATE_FINALUPDATE ||
-		ctx->flag == CRC_CRYPTO_STATE_FINISH)) {
-		crc->sg_cpu[i].start_addr = dma_map_single(crc->dev, ctx->bufnext,
-						CHKSUM_DIGEST_SIZE, DMA_TO_DEVICE);
-		crc->sg_cpu[i].cfg = dma_config;
-		crc->sg_cpu[i].x_count = 1;
-		crc->sg_cpu[i].x_modify = CHKSUM_DIGEST_SIZE;
-		dev_dbg(crc->dev, "%d: crc_dma: start_addr:0x%lx, "
-			"cfg:0x%x, x_count:0x%x, x_modify:0x%x\n",
-			i, crc->sg_cpu[i].start_addr,
-			crc->sg_cpu[i].cfg, crc->sg_cpu[i].x_count,
-			crc->sg_cpu[i].x_modify);
-		i++;
-	}
-
-	if (i == 0)
-		return;
-
-	/* Set the last descriptor to stop mode */
-	crc->sg_cpu[i - 1].cfg &= ~(DMAFLOW | NDSIZE);
-	crc->sg_cpu[i - 1].cfg |= DI_EN;
-	set_dma_curr_desc_addr(crc->dma_ch, (unsigned long *)crc->sg_dma);
-	set_dma_x_count(crc->dma_ch, 0);
-	set_dma_x_modify(crc->dma_ch, 0);
-	set_dma_config(crc->dma_ch, dma_config);
-}
-
-static int bfin_crypto_crc_handle_queue(struct bfin_crypto_crc *crc,
-				  struct ahash_request *req)
-{
-	struct crypto_async_request *async_req, *backlog;
-	struct bfin_crypto_crc_reqctx *ctx;
-	struct scatterlist *sg;
-	int ret = 0;
-	int nsg, i, j;
-	unsigned int nextlen;
-	unsigned long flags;
-	u32 reg;
-
-	spin_lock_irqsave(&crc->lock, flags);
-	if (req)
-		ret = ahash_enqueue_request(&crc->queue, req);
-	if (crc->busy) {
-		spin_unlock_irqrestore(&crc->lock, flags);
-		return ret;
-	}
-	backlog = crypto_get_backlog(&crc->queue);
-	async_req = crypto_dequeue_request(&crc->queue);
-	if (async_req)
-		crc->busy = 1;
-	spin_unlock_irqrestore(&crc->lock, flags);
-
-	if (!async_req)
-		return ret;
-
-	if (backlog)
-		backlog->complete(backlog, -EINPROGRESS);
-
-	req = ahash_request_cast(async_req);
-	crc->req = req;
-	ctx = ahash_request_ctx(req);
-	ctx->sg = NULL;
-	ctx->sg_buflen = 0;
-	ctx->sg_nents = 0;
-
-	dev_dbg(crc->dev, "handling new req, flag=%u, nbytes: %d\n",
-						ctx->flag, req->nbytes);
-
-	if (ctx->flag == CRC_CRYPTO_STATE_FINISH) {
-		if (ctx->bufnext_len == 0) {
-			crc->busy = 0;
-			return 0;
-		}
-
-		/* Pack last crc update buffer to 32bit */
-		memset(ctx->bufnext + ctx->bufnext_len, 0,
-				CHKSUM_DIGEST_SIZE - ctx->bufnext_len);
-	} else {
-		/* Pack small data which is less than 32bit to buffer for next update. */
-		if (ctx->bufnext_len + req->nbytes < CHKSUM_DIGEST_SIZE) {
-			memcpy(ctx->bufnext + ctx->bufnext_len,
-				sg_virt(req->src), req->nbytes);
-			ctx->bufnext_len += req->nbytes;
-			if (ctx->flag == CRC_CRYPTO_STATE_FINALUPDATE &&
-				ctx->bufnext_len) {
-				goto finish_update;
-			} else {
-				crc->busy = 0;
-				return 0;
-			}
-		}
-
-		if (ctx->bufnext_len) {
-			/* Chain in extra bytes of last update */
-			ctx->buflast_len = ctx->bufnext_len;
-			memcpy(ctx->buflast, ctx->bufnext, ctx->buflast_len);
-
-			nsg = ctx->sg_buflen ? 2 : 1;
-			sg_init_table(ctx->bufsl, nsg);
-			sg_set_buf(ctx->bufsl, ctx->buflast, ctx->buflast_len);
-			if (nsg > 1)
-				sg_chain(ctx->bufsl, nsg, req->src);
-			ctx->sg = ctx->bufsl;
-		} else
-			ctx->sg = req->src;
-
-		/* Chop crc buffer size to multiple of 32 bit */
-		nsg = sg_nents(ctx->sg);
-		ctx->sg_nents = nsg;
-		ctx->sg_buflen = ctx->buflast_len + req->nbytes;
-		ctx->bufnext_len = ctx->sg_buflen % 4;
-		ctx->sg_buflen &= ~0x3;
-
-		if (ctx->bufnext_len) {
-			/* copy extra bytes to buffer for next update */
-			memset(ctx->bufnext, 0, CHKSUM_DIGEST_SIZE);
-			nextlen = ctx->bufnext_len;
-			for (i = nsg - 1; i >= 0; i--) {
-				sg = sg_get(ctx->sg, nsg, i);
-				j = min(nextlen, sg_dma_len(sg));
-				memcpy(ctx->bufnext + nextlen - j,
-					sg_virt(sg) + sg_dma_len(sg) - j, j);
-				if (j == sg_dma_len(sg))
-					ctx->sg_nents--;
-				nextlen -= j;
-				if (nextlen == 0)
-					break;
-			}
-		}
-	}
-
-finish_update:
-	if (ctx->bufnext_len && (ctx->flag == CRC_CRYPTO_STATE_FINALUPDATE ||
-		ctx->flag == CRC_CRYPTO_STATE_FINISH))
-		ctx->sg_buflen += CHKSUM_DIGEST_SIZE;
-
-	/* set CRC data count before start DMA */
-	writel(ctx->sg_buflen >> 2, &crc->regs->datacnt);
-
-	/* setup and enable CRC DMA */
-	bfin_crypto_crc_config_dma(crc);
-
-	/* finally kick off CRC operation */
-	reg = readl(&crc->regs->control);
-	writel(reg | BLKEN, &crc->regs->control);
-
-	return -EINPROGRESS;
-}
-
-static int bfin_crypto_crc_update(struct ahash_request *req)
-{
-	struct bfin_crypto_crc_reqctx *ctx = ahash_request_ctx(req);
-
-	if (!req->nbytes)
-		return 0;
-
-	dev_dbg(ctx->crc->dev, "crc_update\n");
-	ctx->total += req->nbytes;
-	ctx->flag = CRC_CRYPTO_STATE_UPDATE;
-
-	return bfin_crypto_crc_handle_queue(ctx->crc, req);
-}
-
-static int bfin_crypto_crc_final(struct ahash_request *req)
-{
-	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
-	struct bfin_crypto_crc_ctx *crc_ctx = crypto_ahash_ctx(tfm);
-	struct bfin_crypto_crc_reqctx *ctx = ahash_request_ctx(req);
-
-	dev_dbg(ctx->crc->dev, "crc_final\n");
-	ctx->flag = CRC_CRYPTO_STATE_FINISH;
-	crc_ctx->key = 0;
-
-	return bfin_crypto_crc_handle_queue(ctx->crc, req);
-}
-
-static int bfin_crypto_crc_finup(struct ahash_request *req)
-{
-	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
-	struct bfin_crypto_crc_ctx *crc_ctx = crypto_ahash_ctx(tfm);
-	struct bfin_crypto_crc_reqctx *ctx = ahash_request_ctx(req);
-
-	dev_dbg(ctx->crc->dev, "crc_finishupdate\n");
-	ctx->total += req->nbytes;
-	ctx->flag = CRC_CRYPTO_STATE_FINALUPDATE;
-	crc_ctx->key = 0;
-
-	return bfin_crypto_crc_handle_queue(ctx->crc, req);
-}
-
-static int bfin_crypto_crc_digest(struct ahash_request *req)
-{
-	int ret;
-
-	ret = bfin_crypto_crc_init(req);
-	if (ret)
-		return ret;
-
-	return bfin_crypto_crc_finup(req);
-}
-
-static int bfin_crypto_crc_noimport(struct ahash_request *req, const void *in)
-{
-	return -ENOSYS;
-}
-
-static int bfin_crypto_crc_noexport(struct ahash_request *req, void *out)
-{
-	return -ENOSYS;
-}
-
-static int bfin_crypto_crc_setkey(struct crypto_ahash *tfm, const u8 *key,
-			unsigned int keylen)
-{
-	struct bfin_crypto_crc_ctx *crc_ctx = crypto_ahash_ctx(tfm);
-
-	dev_dbg(crc_ctx->crc->dev, "crc_setkey\n");
-	if (keylen != CHKSUM_DIGEST_SIZE) {
-		crypto_ahash_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
-		return -EINVAL;
-	}
-
-	crc_ctx->key = get_unaligned_le32(key);
-
-	return 0;
-}
-
-static int bfin_crypto_crc_cra_init(struct crypto_tfm *tfm)
-{
-	struct bfin_crypto_crc_ctx *crc_ctx = crypto_tfm_ctx(tfm);
-
-	crc_ctx->key = 0;
-	crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
-				 sizeof(struct bfin_crypto_crc_reqctx));
-
-	return 0;
-}
-
-static void bfin_crypto_crc_cra_exit(struct crypto_tfm *tfm)
-{
-}
-
-static struct ahash_alg algs = {
-	.init		= bfin_crypto_crc_init,
-	.update		= bfin_crypto_crc_update,
-	.final		= bfin_crypto_crc_final,
-	.finup		= bfin_crypto_crc_finup,
-	.digest		= bfin_crypto_crc_digest,
-	.export		= bfin_crypto_crc_noexport,
-	.import		= bfin_crypto_crc_noimport,
-	.setkey		= bfin_crypto_crc_setkey,
-	.halg.digestsize	= CHKSUM_DIGEST_SIZE,
-	.halg.base	= {
-		.cra_name		= "hmac(crc32)",
-		.cra_driver_name	= DRIVER_NAME,
-		.cra_priority		= 100,
-		.cra_flags		= CRYPTO_ALG_TYPE_AHASH |
-						CRYPTO_ALG_ASYNC |
-						CRYPTO_ALG_OPTIONAL_KEY,
-		.cra_blocksize		= CHKSUM_BLOCK_SIZE,
-		.cra_ctxsize		= sizeof(struct bfin_crypto_crc_ctx),
-		.cra_alignmask		= 3,
-		.cra_module		= THIS_MODULE,
-		.cra_init		= bfin_crypto_crc_cra_init,
-		.cra_exit		= bfin_crypto_crc_cra_exit,
-	}
-};
-
-static void bfin_crypto_crc_done_task(unsigned long data)
-{
-	struct bfin_crypto_crc *crc = (struct bfin_crypto_crc *)data;
-
-	bfin_crypto_crc_handle_queue(crc, NULL);
-}
-
-static irqreturn_t bfin_crypto_crc_handler(int irq, void *dev_id)
-{
-	struct bfin_crypto_crc *crc = dev_id;
-	u32 reg;
-
-	if (readl(&crc->regs->status) & DCNTEXP) {
-		writel(DCNTEXP, &crc->regs->status);
-
-		/* prepare results */
-		put_unaligned_le32(readl(&crc->regs->result),
-			crc->req->result);
-
-		reg = readl(&crc->regs->control);
-		writel(reg & ~BLKEN, &crc->regs->control);
-		crc->busy = 0;
-
-		if (crc->req->base.complete)
-			crc->req->base.complete(&crc->req->base, 0);
-
-		tasklet_schedule(&crc->done_task);
-
-		return IRQ_HANDLED;
-	} else
-		return IRQ_NONE;
-}
-
-#ifdef CONFIG_PM
-/**
- *	bfin_crypto_crc_suspend - suspend crc device
- *	@pdev: device being suspended
- *	@state: requested suspend state
- */
-static int bfin_crypto_crc_suspend(struct platform_device *pdev, pm_message_t state)
-{
-	struct bfin_crypto_crc *crc = platform_get_drvdata(pdev);
-	int i = 100000;
-
-	while ((readl(&crc->regs->control) & BLKEN) && --i)
-		cpu_relax();
-
-	if (i == 0)
-		return -EBUSY;
-
-	return 0;
-}
-#else
-# define bfin_crypto_crc_suspend NULL
-#endif
-
-#define bfin_crypto_crc_resume NULL
-
-/**
- *	bfin_crypto_crc_probe - Initialize module
- *
- */
-static int bfin_crypto_crc_probe(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	struct resource *res;
-	struct bfin_crypto_crc *crc;
-	unsigned int timeout = 100000;
-	int ret;
-
-	crc = devm_kzalloc(dev, sizeof(*crc), GFP_KERNEL);
-	if (!crc)
-		return -ENOMEM;
-
-	crc->dev = dev;
-
-	INIT_LIST_HEAD(&crc->list);
-	spin_lock_init(&crc->lock);
-	tasklet_init(&crc->done_task, bfin_crypto_crc_done_task, (unsigned long)crc);
-	crypto_init_queue(&crc->queue, CRC_CCRYPTO_QUEUE_LENGTH);
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	crc->regs = devm_ioremap_resource(dev, res);
-	if (IS_ERR((void *)crc->regs)) {
-		dev_err(&pdev->dev, "Cannot map CRC IO\n");
-		return PTR_ERR((void *)crc->regs);
-	}
-
-	crc->irq = platform_get_irq(pdev, 0);
-	if (crc->irq < 0) {
-		dev_err(&pdev->dev, "No CRC DCNTEXP IRQ specified\n");
-		return -ENOENT;
-	}
-
-	ret = devm_request_irq(dev, crc->irq, bfin_crypto_crc_handler,
-			IRQF_SHARED, dev_name(dev), crc);
-	if (ret) {
-		dev_err(&pdev->dev, "Unable to request blackfin crc irq\n");
-		return ret;
-	}
-
-	res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
-	if (res == NULL) {
-		dev_err(&pdev->dev, "No CRC DMA channel specified\n");
-		return -ENOENT;
-	}
-	crc->dma_ch = res->start;
-
-	ret = request_dma(crc->dma_ch, dev_name(dev));
-	if (ret) {
-		dev_err(&pdev->dev, "Unable to attach Blackfin CRC DMA channel\n");
-		return ret;
-	}
-
-	crc->sg_cpu = dma_alloc_coherent(&pdev->dev, PAGE_SIZE, &crc->sg_dma, GFP_KERNEL);
-	if (crc->sg_cpu == NULL) {
-		ret = -ENOMEM;
-		goto out_error_dma;
-	}
-	/*
-	 * need at most CRC_MAX_DMA_DESC sg + CRC_MAX_DMA_DESC middle  +
-	 * 1 last + 1 next dma descriptors
-	 */
-	crc->sg_mid_buf = (u8 *)(crc->sg_cpu + ((CRC_MAX_DMA_DESC + 1) << 1));
-	crc->sg_mid_dma = crc->sg_dma + sizeof(struct dma_desc_array)
-			* ((CRC_MAX_DMA_DESC + 1) << 1);
-
-	writel(0, &crc->regs->control);
-	crc->poly = (u32)pdev->dev.platform_data;
-	writel(crc->poly, &crc->regs->poly);
-
-	while (!(readl(&crc->regs->status) & LUTDONE) && (--timeout) > 0)
-		cpu_relax();
-
-	if (timeout == 0)
-		dev_info(&pdev->dev, "init crc poly timeout\n");
-
-	platform_set_drvdata(pdev, crc);
-
-	spin_lock(&crc_list.lock);
-	list_add(&crc->list, &crc_list.dev_list);
-	spin_unlock(&crc_list.lock);
-
-	if (list_is_singular(&crc_list.dev_list)) {
-		ret = crypto_register_ahash(&algs);
-		if (ret) {
-			dev_err(&pdev->dev,
-				"Can't register crypto ahash device\n");
-			goto out_error_dma;
-		}
-	}
-
-	dev_info(&pdev->dev, "initialized\n");
-
-	return 0;
-
-out_error_dma:
-	if (crc->sg_cpu)
-		dma_free_coherent(&pdev->dev, PAGE_SIZE, crc->sg_cpu, crc->sg_dma);
-	free_dma(crc->dma_ch);
-
-	return ret;
-}
-
-/**
- *	bfin_crypto_crc_remove - Initialize module
- *
- */
-static int bfin_crypto_crc_remove(struct platform_device *pdev)
-{
-	struct bfin_crypto_crc *crc = platform_get_drvdata(pdev);
-
-	if (!crc)
-		return -ENODEV;
-
-	spin_lock(&crc_list.lock);
-	list_del(&crc->list);
-	spin_unlock(&crc_list.lock);
-
-	crypto_unregister_ahash(&algs);
-	tasklet_kill(&crc->done_task);
-	free_dma(crc->dma_ch);
-
-	return 0;
-}
-
-static struct platform_driver bfin_crypto_crc_driver = {
-	.probe     = bfin_crypto_crc_probe,
-	.remove    = bfin_crypto_crc_remove,
-	.suspend   = bfin_crypto_crc_suspend,
-	.resume    = bfin_crypto_crc_resume,
-	.driver    = {
-		.name  = DRIVER_NAME,
-	},
-};
-
-/**
- *	bfin_crypto_crc_mod_init - Initialize module
- *
- *	Checks the module params and registers the platform driver.
- *	Real work is in the platform probe function.
- */
-static int __init bfin_crypto_crc_mod_init(void)
-{
-	int ret;
-
-	pr_info("Blackfin hardware CRC crypto driver\n");
-
-	INIT_LIST_HEAD(&crc_list.dev_list);
-	spin_lock_init(&crc_list.lock);
-
-	ret = platform_driver_register(&bfin_crypto_crc_driver);
-	if (ret) {
-		pr_err("unable to register driver\n");
-		return ret;
-	}
-
-	return 0;
-}
-
-/**
- *	bfin_crypto_crc_mod_exit - Deinitialize module
- */
-static void __exit bfin_crypto_crc_mod_exit(void)
-{
-	platform_driver_unregister(&bfin_crypto_crc_driver);
-}
-
-module_init(bfin_crypto_crc_mod_init);
-module_exit(bfin_crypto_crc_mod_exit);
-
-MODULE_AUTHOR("Sonic Zhang <sonic.zhang@analog.com>");
-MODULE_DESCRIPTION("Blackfin CRC hardware crypto driver");
-MODULE_LICENSE("GPL");
diff --git a/drivers/crypto/bfin_crc.h b/drivers/crypto/bfin_crc.h
deleted file mode 100644
index 786ef746d109..000000000000
--- a/drivers/crypto/bfin_crc.h
+++ /dev/null
@@ -1,124 +0,0 @@
-/*
- * bfin_crc.h - interface to Blackfin CRC controllers
- *
- * Copyright 2012 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
- */
-
-#ifndef __BFIN_CRC_H__
-#define __BFIN_CRC_H__
-
-/* Function driver which use hardware crc must initialize the structure */
-struct crc_info {
-	/* Input data address */
-	unsigned char *in_addr;
-	/* Output data address */
-	unsigned char *out_addr;
-	/* Input or output bytes */
-	unsigned long datasize;
-	union {
-	/* CRC to compare with that of input buffer */
-	unsigned long crc_compare;
-	/* Value to compare with input data */
-	unsigned long val_verify;
-	/* Value to fill */
-	unsigned long val_fill;
-	};
-	/* Value to program the 32b CRC Polynomial */
-	unsigned long crc_poly;
-	union {
-	/* CRC calculated from the input data */
-	unsigned long crc_result;
-	/* First failed position to verify input data */
-	unsigned long pos_verify;
-	};
-	/* CRC mirror flags */
-	unsigned int bitmirr:1;
-	unsigned int bytmirr:1;
-	unsigned int w16swp:1;
-	unsigned int fdsel:1;
-	unsigned int rsltmirr:1;
-	unsigned int polymirr:1;
-	unsigned int cmpmirr:1;
-};
-
-/* Userspace interface */
-#define CRC_IOC_MAGIC		'C'
-#define CRC_IOC_CALC_CRC	_IOWR('C', 0x01, unsigned int)
-#define CRC_IOC_MEMCPY_CRC	_IOWR('C', 0x02, unsigned int)
-#define CRC_IOC_VERIFY_VAL	_IOWR('C', 0x03, unsigned int)
-#define CRC_IOC_FILL_VAL	_IOWR('C', 0x04, unsigned int)
-
-
-#ifdef __KERNEL__
-
-#include <linux/types.h>
-#include <linux/spinlock.h>
-
-struct crc_register {
-	u32 control;
-	u32 datacnt;
-	u32 datacntrld;
-	u32 __pad_1[2];
-	u32 compare;
-	u32 fillval;
-	u32 datafifo;
-	u32 intren;
-	u32 intrenset;
-	u32 intrenclr;
-	u32 poly;
-	u32 __pad_2[4];
-	u32 status;
-	u32 datacntcap;
-	u32 __pad_3;
-	u32 result;
-	u32 curresult;
-	u32 __pad_4[3];
-	u32 revid;
-};
-
-/* CRC_STATUS Masks */
-#define CMPERR			0x00000002	/* Compare error */
-#define DCNTEXP			0x00000010	/* datacnt register expired */
-#define IBR			0x00010000	/* Input buffer ready */
-#define OBR			0x00020000	/* Output buffer ready */
-#define IRR			0x00040000	/* Immediate result readt */
-#define LUTDONE			0x00080000	/* Look-up table generation done */
-#define FSTAT			0x00700000	/* FIFO status */
-#define MAX_FIFO		4		/* Max fifo size */
-
-/* CRC_CONTROL Masks */
-#define BLKEN			0x00000001	/* Block enable */
-#define OPMODE			0x000000F0	/* Operation mode */
-#define OPMODE_OFFSET		4		/* Operation mode mask offset*/
-#define MODE_DMACPY_CRC		1		/* MTM CRC compute and compare */
-#define MODE_DATA_FILL		2		/* MTM data fill */
-#define MODE_CALC_CRC		3		/* MSM CRC compute and compare */
-#define MODE_DATA_VERIFY	4		/* MSM data verify */
-#define AUTOCLRZ		0x00000100	/* Auto clear to zero */
-#define AUTOCLRF		0x00000200	/* Auto clear to one */
-#define OBRSTALL		0x00001000	/* Stall on output buffer ready */
-#define IRRSTALL		0x00002000	/* Stall on immediate result ready */
-#define BITMIRR			0x00010000	/* Mirror bits within each byte of 32-bit input data */
-#define BITMIRR_OFFSET		16		/* Mirror bits offset */
-#define BYTMIRR			0x00020000	/* Mirror bytes of 32-bit input data */
-#define BYTMIRR_OFFSET		17		/* Mirror bytes offset */
-#define W16SWP			0x00040000	/* Mirror uppper and lower 16-bit word of 32-bit input data */
-#define W16SWP_OFFSET		18		/* Mirror 16-bit word offset */
-#define FDSEL			0x00080000	/* FIFO is written after input data is mirrored */
-#define FDSEL_OFFSET		19		/* Mirror FIFO offset */
-#define RSLTMIRR		0x00100000	/* CRC result registers are mirrored. */
-#define RSLTMIRR_OFFSET		20		/* Mirror CRC result offset. */
-#define POLYMIRR		0x00200000	/* CRC poly register is mirrored. */
-#define POLYMIRR_OFFSET		21		/* Mirror CRC poly offset. */
-#define CMPMIRR			0x00400000	/* CRC compare register is mirrored. */
-#define CMPMIRR_OFFSET		22		/* Mirror CRC compare offset. */
-
-/* CRC_INTREN Masks */
-#define CMPERRI 		0x02		/* CRC_ERROR_INTR */
-#define DCNTEXPI 		0x10		/* CRC_STATUS_INTR */
-
-#endif
-
-#endif