crypto: atmel - add Atmel DES/TDES driver
authorNicolas Royer <nicolas@eukrea.com>
Sun, 1 Jul 2012 17:19:45 +0000 (19:19 +0200)
committerHerbert Xu <herbert@gondor.apana.org.au>
Wed, 11 Jul 2012 03:08:14 +0000 (11:08 +0800)
Signed-off-by: Nicolas Royer <nicolas@eukrea.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Eric Bénard <eric@eukrea.com>
Tested-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
drivers/crypto/Kconfig
drivers/crypto/Makefile
drivers/crypto/atmel-tdes-regs.h [new file with mode: 0644]
drivers/crypto/atmel-tdes.c [new file with mode: 0644]

index d04eabef1e8c2b4552b7e7712e9f82888c0d68bc..76d489b8890fbd231a22ee319f4464873e863641 100644 (file)
@@ -349,4 +349,20 @@ config CRYPTO_DEV_ATMEL_AES
          To compile this driver as a module, choose M here: the module
          will be called atmel-aes.
 
+config CRYPTO_DEV_ATMEL_TDES
+       tristate "Support for Atmel DES/TDES hw accelerator"
+       depends on ARCH_AT91
+       select CRYPTO_DES
+       select CRYPTO_CBC
+       select CRYPTO_ECB
+       select CRYPTO_ALGAPI
+       select CRYPTO_BLKCIPHER
+       help
+         Some Atmel processors have DES/TDES hw accelerator.
+         Select this if you want to use the Atmel module for
+         DES/TDES algorithms.
+
+         To compile this driver as a module, choose M here: the module
+         will be called atmel-tdes.
+
 endif # CRYPTO_HW
index 44a8147c630efa19adeaeadc28ad9597a1d9c3d3..6b8b75f2b8c06cd87fa221ac72430cf406456919 100644 (file)
@@ -18,3 +18,4 @@ obj-$(CONFIG_CRYPTO_DEV_UX500) += ux500/
 obj-$(CONFIG_CRYPTO_DEV_BFIN_CRC) += bfin_crc.o
 obj-$(CONFIG_CRYPTO_DEV_NX) += nx/
 obj-$(CONFIG_CRYPTO_DEV_ATMEL_AES) += atmel-aes.o
+obj-$(CONFIG_CRYPTO_DEV_ATMEL_TDES) += atmel-tdes.o
diff --git a/drivers/crypto/atmel-tdes-regs.h b/drivers/crypto/atmel-tdes-regs.h
new file mode 100644 (file)
index 0000000..5ac2a90
--- /dev/null
@@ -0,0 +1,89 @@
+#ifndef __ATMEL_TDES_REGS_H__
+#define __ATMEL_TDES_REGS_H__
+
+#define TDES_CR                        0x00
+#define TDES_CR_START                  (1 << 0)
+#define TDES_CR_SWRST                  (1 << 8)
+#define TDES_CR_LOADSEED               (1 << 16)
+
+#define        TDES_MR                 0x04
+#define TDES_MR_CYPHER_DEC             (0 << 0)
+#define TDES_MR_CYPHER_ENC             (1 << 0)
+#define TDES_MR_TDESMOD_MASK   (0x3 << 1)
+#define TDES_MR_TDESMOD_DES            (0x0 << 1)
+#define TDES_MR_TDESMOD_TDES   (0x1 << 1)
+#define TDES_MR_TDESMOD_XTEA   (0x2 << 1)
+#define TDES_MR_KEYMOD_3KEY            (0 << 4)
+#define TDES_MR_KEYMOD_2KEY            (1 << 4)
+#define TDES_MR_SMOD_MASK              (0x3 << 8)
+#define TDES_MR_SMOD_MANUAL            (0x0 << 8)
+#define TDES_MR_SMOD_AUTO              (0x1 << 8)
+#define TDES_MR_SMOD_PDC               (0x2 << 8)
+#define TDES_MR_OPMOD_MASK             (0x3 << 12)
+#define TDES_MR_OPMOD_ECB              (0x0 << 12)
+#define TDES_MR_OPMOD_CBC              (0x1 << 12)
+#define TDES_MR_OPMOD_OFB              (0x2 << 12)
+#define TDES_MR_OPMOD_CFB              (0x3 << 12)
+#define TDES_MR_LOD                            (0x1 << 15)
+#define TDES_MR_CFBS_MASK              (0x3 << 16)
+#define TDES_MR_CFBS_64b               (0x0 << 16)
+#define TDES_MR_CFBS_32b               (0x1 << 16)
+#define TDES_MR_CFBS_16b               (0x2 << 16)
+#define TDES_MR_CFBS_8b                        (0x3 << 16)
+#define TDES_MR_CKEY_MASK              (0xF << 20)
+#define TDES_MR_CKEY_OFFSET            20
+#define TDES_MR_CTYPE_MASK             (0x3F << 24)
+#define TDES_MR_CTYPE_OFFSET   24
+
+#define        TDES_IER                0x10
+#define        TDES_IDR                0x14
+#define        TDES_IMR                0x18
+#define        TDES_ISR                0x1C
+#define TDES_INT_DATARDY               (1 << 0)
+#define TDES_INT_ENDRX                 (1 << 1)
+#define TDES_INT_ENDTX                 (1 << 2)
+#define TDES_INT_RXBUFF                        (1 << 3)
+#define TDES_INT_TXBUFE                        (1 << 4)
+#define TDES_INT_URAD                  (1 << 8)
+#define TDES_ISR_URAT_MASK             (0x3 << 12)
+#define TDES_ISR_URAT_IDR              (0x0 << 12)
+#define TDES_ISR_URAT_ODR              (0x1 << 12)
+#define TDES_ISR_URAT_MR               (0x2 << 12)
+#define TDES_ISR_URAT_WO               (0x3 << 12)
+
+
+#define        TDES_KEY1W1R    0x20
+#define        TDES_KEY1W2R    0x24
+#define        TDES_KEY2W1R    0x28
+#define        TDES_KEY2W2R    0x2C
+#define        TDES_KEY3W1R    0x30
+#define        TDES_KEY3W2R    0x34
+#define        TDES_IDATA1R    0x40
+#define        TDES_IDATA2R    0x44
+#define        TDES_ODATA1R    0x50
+#define        TDES_ODATA2R    0x54
+#define        TDES_IV1R               0x60
+#define        TDES_IV2R               0x64
+
+#define        TDES_XTEARNDR   0x70
+#define        TDES_XTEARNDR_XTEA_RNDS_MASK    (0x3F << 0)
+#define        TDES_XTEARNDR_XTEA_RNDS_OFFSET  0
+
+#define TDES_RPR               0x100
+#define TDES_RCR               0x104
+#define TDES_TPR               0x108
+#define TDES_TCR               0x10C
+#define TDES_RNPR              0x118
+#define TDES_RNCR              0x11C
+#define TDES_TNPR              0x118
+#define TDES_TNCR              0x11C
+#define TDES_PTCR              0x120
+#define TDES_PTCR_RXTEN                        (1 << 0)
+#define TDES_PTCR_RXTDIS               (1 << 1)
+#define TDES_PTCR_TXTEN                        (1 << 8)
+#define TDES_PTCR_TXTDIS               (1 << 9)
+#define TDES_PTSR              0x124
+#define TDES_PTSR_RXTEN                        (1 << 0)
+#define TDES_PTSR_TXTEN                        (1 << 8)
+
+#endif /* __ATMEL_TDES_REGS_H__ */
diff --git a/drivers/crypto/atmel-tdes.c b/drivers/crypto/atmel-tdes.c
new file mode 100644 (file)
index 0000000..eb2b61e
--- /dev/null
@@ -0,0 +1,1215 @@
+/*
+ * Cryptographic API.
+ *
+ * Support for ATMEL DES/TDES HW acceleration.
+ *
+ * Copyright (c) 2012 Eukréa Electromatique - ATMEL
+ * Author: Nicolas Royer <nicolas@eukrea.com>
+ *
+ * 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.
+ *
+ * Some ideas are from omap-aes.c drivers.
+ */
+
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/hw_random.h>
+#include <linux/platform_device.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/clk.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/des.h>
+#include <crypto/hash.h>
+#include <crypto/internal/hash.h>
+#include "atmel-tdes-regs.h"
+
+/* TDES flags  */
+#define TDES_FLAGS_MODE_MASK           0x007f
+#define TDES_FLAGS_ENCRYPT     BIT(0)
+#define TDES_FLAGS_CBC         BIT(1)
+#define TDES_FLAGS_CFB         BIT(2)
+#define TDES_FLAGS_CFB8                BIT(3)
+#define TDES_FLAGS_CFB16       BIT(4)
+#define TDES_FLAGS_CFB32       BIT(5)
+#define TDES_FLAGS_OFB         BIT(6)
+
+#define TDES_FLAGS_INIT                BIT(16)
+#define TDES_FLAGS_FAST                BIT(17)
+#define TDES_FLAGS_BUSY                BIT(18)
+
+#define ATMEL_TDES_QUEUE_LENGTH        1
+
+#define CFB8_BLOCK_SIZE                1
+#define CFB16_BLOCK_SIZE       2
+#define CFB32_BLOCK_SIZE       4
+#define CFB64_BLOCK_SIZE       8
+
+
+struct atmel_tdes_dev;
+
+struct atmel_tdes_ctx {
+       struct atmel_tdes_dev *dd;
+
+       int             keylen;
+       u32             key[3*DES_KEY_SIZE / sizeof(u32)];
+       unsigned long   flags;
+};
+
+struct atmel_tdes_reqctx {
+       unsigned long mode;
+};
+
+struct atmel_tdes_dev {
+       struct list_head        list;
+       unsigned long           phys_base;
+       void __iomem            *io_base;
+
+       struct atmel_tdes_ctx   *ctx;
+       struct device           *dev;
+       struct clk                      *iclk;
+       int                                     irq;
+
+       unsigned long           flags;
+       int                     err;
+
+       spinlock_t              lock;
+       struct crypto_queue     queue;
+
+       struct tasklet_struct   done_task;
+       struct tasklet_struct   queue_task;
+
+       struct ablkcipher_request       *req;
+       size_t                          total;
+
+       struct scatterlist      *in_sg;
+       size_t                          in_offset;
+       struct scatterlist      *out_sg;
+       size_t                          out_offset;
+
+       size_t  buflen;
+       size_t  dma_size;
+
+       void    *buf_in;
+       int             dma_in;
+       dma_addr_t      dma_addr_in;
+
+       void    *buf_out;
+       int             dma_out;
+       dma_addr_t      dma_addr_out;
+};
+
+struct atmel_tdes_drv {
+       struct list_head        dev_list;
+       spinlock_t              lock;
+};
+
+static struct atmel_tdes_drv atmel_tdes = {
+       .dev_list = LIST_HEAD_INIT(atmel_tdes.dev_list),
+       .lock = __SPIN_LOCK_UNLOCKED(atmel_tdes.lock),
+};
+
+static int atmel_tdes_sg_copy(struct scatterlist **sg, size_t *offset,
+                       void *buf, size_t buflen, size_t total, int out)
+{
+       unsigned int count, off = 0;
+
+       while (buflen && total) {
+               count = min((*sg)->length - *offset, total);
+               count = min(count, buflen);
+
+               if (!count)
+                       return off;
+
+               scatterwalk_map_and_copy(buf + off, *sg, *offset, count, out);
+
+               off += count;
+               buflen -= count;
+               *offset += count;
+               total -= count;
+
+               if (*offset == (*sg)->length) {
+                       *sg = sg_next(*sg);
+                       if (*sg)
+                               *offset = 0;
+                       else
+                               total = 0;
+               }
+       }
+
+       return off;
+}
+
+static inline u32 atmel_tdes_read(struct atmel_tdes_dev *dd, u32 offset)
+{
+       return readl_relaxed(dd->io_base + offset);
+}
+
+static inline void atmel_tdes_write(struct atmel_tdes_dev *dd,
+                                       u32 offset, u32 value)
+{
+       writel_relaxed(value, dd->io_base + offset);
+}
+
+static void atmel_tdes_write_n(struct atmel_tdes_dev *dd, u32 offset,
+                                       u32 *value, int count)
+{
+       for (; count--; value++, offset += 4)
+               atmel_tdes_write(dd, offset, *value);
+}
+
+static struct atmel_tdes_dev *atmel_tdes_find_dev(struct atmel_tdes_ctx *ctx)
+{
+       struct atmel_tdes_dev *tdes_dd = NULL;
+       struct atmel_tdes_dev *tmp;
+
+       spin_lock_bh(&atmel_tdes.lock);
+       if (!ctx->dd) {
+               list_for_each_entry(tmp, &atmel_tdes.dev_list, list) {
+                       tdes_dd = tmp;
+                       break;
+               }
+               ctx->dd = tdes_dd;
+       } else {
+               tdes_dd = ctx->dd;
+       }
+       spin_unlock_bh(&atmel_tdes.lock);
+
+       return tdes_dd;
+}
+
+static int atmel_tdes_hw_init(struct atmel_tdes_dev *dd)
+{
+       clk_prepare_enable(dd->iclk);
+
+       if (!(dd->flags & TDES_FLAGS_INIT)) {
+               atmel_tdes_write(dd, TDES_CR, TDES_CR_SWRST);
+               dd->flags |= TDES_FLAGS_INIT;
+               dd->err = 0;
+       }
+
+       return 0;
+}
+
+static int atmel_tdes_write_ctrl(struct atmel_tdes_dev *dd)
+{
+       int err;
+       u32 valcr = 0, valmr = TDES_MR_SMOD_PDC;
+
+       err = atmel_tdes_hw_init(dd);
+
+       if (err)
+               return err;
+
+       atmel_tdes_write(dd, TDES_PTCR, TDES_PTCR_TXTDIS|TDES_PTCR_RXTDIS);
+
+       /* MR register must be set before IV registers */
+       if (dd->ctx->keylen > (DES_KEY_SIZE << 1)) {
+               valmr |= TDES_MR_KEYMOD_3KEY;
+               valmr |= TDES_MR_TDESMOD_TDES;
+       } else if (dd->ctx->keylen > DES_KEY_SIZE) {
+               valmr |= TDES_MR_KEYMOD_2KEY;
+               valmr |= TDES_MR_TDESMOD_TDES;
+       } else {
+               valmr |= TDES_MR_TDESMOD_DES;
+       }
+
+       if (dd->flags & TDES_FLAGS_CBC) {
+               valmr |= TDES_MR_OPMOD_CBC;
+       } else if (dd->flags & TDES_FLAGS_CFB) {
+               valmr |= TDES_MR_OPMOD_CFB;
+
+               if (dd->flags & TDES_FLAGS_CFB8)
+                       valmr |= TDES_MR_CFBS_8b;
+               else if (dd->flags & TDES_FLAGS_CFB16)
+                       valmr |= TDES_MR_CFBS_16b;
+               else if (dd->flags & TDES_FLAGS_CFB32)
+                       valmr |= TDES_MR_CFBS_32b;
+       } else if (dd->flags & TDES_FLAGS_OFB) {
+               valmr |= TDES_MR_OPMOD_OFB;
+       }
+
+       if ((dd->flags & TDES_FLAGS_ENCRYPT) || (dd->flags & TDES_FLAGS_OFB))
+               valmr |= TDES_MR_CYPHER_ENC;
+
+       atmel_tdes_write(dd, TDES_CR, valcr);
+       atmel_tdes_write(dd, TDES_MR, valmr);
+
+       atmel_tdes_write_n(dd, TDES_KEY1W1R, dd->ctx->key,
+                                               dd->ctx->keylen >> 2);
+
+       if (((dd->flags & TDES_FLAGS_CBC) || (dd->flags & TDES_FLAGS_CFB) ||
+               (dd->flags & TDES_FLAGS_OFB)) && dd->req->info) {
+               atmel_tdes_write_n(dd, TDES_IV1R, dd->req->info, 2);
+       }
+
+       return 0;
+}
+
+static int atmel_tdes_crypt_dma_stop(struct atmel_tdes_dev *dd)
+{
+       int err = 0;
+       size_t count;
+
+       atmel_tdes_write(dd, TDES_PTCR, TDES_PTCR_TXTDIS|TDES_PTCR_RXTDIS);
+
+       if (dd->flags & TDES_FLAGS_FAST) {
+               dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_FROM_DEVICE);
+               dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE);
+       } else {
+               dma_sync_single_for_device(dd->dev, dd->dma_addr_out,
+                                          dd->dma_size, DMA_FROM_DEVICE);
+
+               /* copy data */
+               count = atmel_tdes_sg_copy(&dd->out_sg, &dd->out_offset,
+                               dd->buf_out, dd->buflen, dd->dma_size, 1);
+               if (count != dd->dma_size) {
+                       err = -EINVAL;
+                       pr_err("not all data converted: %u\n", count);
+               }
+       }
+
+       return err;
+}
+
+static int atmel_tdes_dma_init(struct atmel_tdes_dev *dd)
+{
+       int err = -ENOMEM;
+
+       dd->buf_in = (void *)__get_free_pages(GFP_KERNEL, 0);
+       dd->buf_out = (void *)__get_free_pages(GFP_KERNEL, 0);
+       dd->buflen = PAGE_SIZE;
+       dd->buflen &= ~(DES_BLOCK_SIZE - 1);
+
+       if (!dd->buf_in || !dd->buf_out) {
+               dev_err(dd->dev, "unable to alloc pages.\n");
+               goto err_alloc;
+       }
+
+       /* MAP here */
+       dd->dma_addr_in = dma_map_single(dd->dev, dd->buf_in,
+                                       dd->buflen, DMA_TO_DEVICE);
+       if (dma_mapping_error(dd->dev, dd->dma_addr_in)) {
+               dev_err(dd->dev, "dma %d bytes error\n", dd->buflen);
+               err = -EINVAL;
+               goto err_map_in;
+       }
+
+       dd->dma_addr_out = dma_map_single(dd->dev, dd->buf_out,
+                                       dd->buflen, DMA_FROM_DEVICE);
+       if (dma_mapping_error(dd->dev, dd->dma_addr_out)) {
+               dev_err(dd->dev, "dma %d bytes error\n", dd->buflen);
+               err = -EINVAL;
+               goto err_map_out;
+       }
+
+       return 0;
+
+err_map_out:
+       dma_unmap_single(dd->dev, dd->dma_addr_in, dd->buflen,
+               DMA_TO_DEVICE);
+err_map_in:
+       free_page((unsigned long)dd->buf_out);
+       free_page((unsigned long)dd->buf_in);
+err_alloc:
+       if (err)
+               pr_err("error: %d\n", err);
+       return err;
+}
+
+static void atmel_tdes_dma_cleanup(struct atmel_tdes_dev *dd)
+{
+       dma_unmap_single(dd->dev, dd->dma_addr_out, dd->buflen,
+                        DMA_FROM_DEVICE);
+       dma_unmap_single(dd->dev, dd->dma_addr_in, dd->buflen,
+               DMA_TO_DEVICE);
+       free_page((unsigned long)dd->buf_out);
+       free_page((unsigned long)dd->buf_in);
+}
+
+static int atmel_tdes_crypt_dma(struct crypto_tfm *tfm, dma_addr_t dma_addr_in,
+                              dma_addr_t dma_addr_out, int length)
+{
+       struct atmel_tdes_ctx *ctx = crypto_tfm_ctx(tfm);
+       struct atmel_tdes_dev *dd = ctx->dd;
+       int len32;
+
+       dd->dma_size = length;
+
+       if (!(dd->flags & TDES_FLAGS_FAST)) {
+               dma_sync_single_for_device(dd->dev, dma_addr_in, length,
+                                          DMA_TO_DEVICE);
+       }
+
+       if ((dd->flags & TDES_FLAGS_CFB) && (dd->flags & TDES_FLAGS_CFB8))
+               len32 = DIV_ROUND_UP(length, sizeof(u8));
+       else if ((dd->flags & TDES_FLAGS_CFB) && (dd->flags & TDES_FLAGS_CFB16))
+               len32 = DIV_ROUND_UP(length, sizeof(u16));
+       else
+               len32 = DIV_ROUND_UP(length, sizeof(u32));
+
+       atmel_tdes_write(dd, TDES_PTCR, TDES_PTCR_TXTDIS|TDES_PTCR_RXTDIS);
+       atmel_tdes_write(dd, TDES_TPR, dma_addr_in);
+       atmel_tdes_write(dd, TDES_TCR, len32);
+       atmel_tdes_write(dd, TDES_RPR, dma_addr_out);
+       atmel_tdes_write(dd, TDES_RCR, len32);
+
+       /* Enable Interrupt */
+       atmel_tdes_write(dd, TDES_IER, TDES_INT_ENDRX);
+
+       /* Start DMA transfer */
+       atmel_tdes_write(dd, TDES_PTCR, TDES_PTCR_TXTEN | TDES_PTCR_RXTEN);
+
+       return 0;
+}
+
+static int atmel_tdes_crypt_dma_start(struct atmel_tdes_dev *dd)
+{
+       struct crypto_tfm *tfm = crypto_ablkcipher_tfm(
+                                       crypto_ablkcipher_reqtfm(dd->req));
+       int err, fast = 0, in, out;
+       size_t count;
+       dma_addr_t addr_in, addr_out;
+
+       if (sg_is_last(dd->in_sg) && sg_is_last(dd->out_sg)) {
+               /* check for alignment */
+               in = IS_ALIGNED((u32)dd->in_sg->offset, sizeof(u32));
+               out = IS_ALIGNED((u32)dd->out_sg->offset, sizeof(u32));
+
+               fast = in && out;
+       }
+
+       if (fast)  {
+               count = min(dd->total, sg_dma_len(dd->in_sg));
+               count = min(count, sg_dma_len(dd->out_sg));
+
+               if (count != dd->total) {
+                       pr_err("request length != buffer length\n");
+                       return -EINVAL;
+               }
+
+               err = dma_map_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE);
+               if (!err) {
+                       dev_err(dd->dev, "dma_map_sg() error\n");
+                       return -EINVAL;
+               }
+
+               err = dma_map_sg(dd->dev, dd->out_sg, 1,
+                               DMA_FROM_DEVICE);
+               if (!err) {
+                       dev_err(dd->dev, "dma_map_sg() error\n");
+                       dma_unmap_sg(dd->dev, dd->in_sg, 1,
+                               DMA_TO_DEVICE);
+                       return -EINVAL;
+               }
+
+               addr_in = sg_dma_address(dd->in_sg);
+               addr_out = sg_dma_address(dd->out_sg);
+
+               dd->flags |= TDES_FLAGS_FAST;
+
+       } else {
+               /* use cache buffers */
+               count = atmel_tdes_sg_copy(&dd->in_sg, &dd->in_offset,
+                               dd->buf_in, dd->buflen, dd->total, 0);
+
+               addr_in = dd->dma_addr_in;
+               addr_out = dd->dma_addr_out;
+
+               dd->flags &= ~TDES_FLAGS_FAST;
+
+       }
+
+       dd->total -= count;
+
+       err = atmel_tdes_crypt_dma(tfm, addr_in, addr_out, count);
+       if (err) {
+               dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE);
+               dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_TO_DEVICE);
+       }
+
+       return err;
+}
+
+
+static void atmel_tdes_finish_req(struct atmel_tdes_dev *dd, int err)
+{
+       struct ablkcipher_request *req = dd->req;
+
+       clk_disable_unprepare(dd->iclk);
+
+       dd->flags &= ~TDES_FLAGS_BUSY;
+
+       req->base.complete(&req->base, err);
+}
+
+static int atmel_tdes_handle_queue(struct atmel_tdes_dev *dd,
+                              struct ablkcipher_request *req)
+{
+       struct crypto_async_request *async_req, *backlog;
+       struct atmel_tdes_ctx *ctx;
+       struct atmel_tdes_reqctx *rctx;
+       unsigned long flags;
+       int err, ret = 0;
+
+       spin_lock_irqsave(&dd->lock, flags);
+       if (req)
+               ret = ablkcipher_enqueue_request(&dd->queue, req);
+       if (dd->flags & TDES_FLAGS_BUSY) {
+               spin_unlock_irqrestore(&dd->lock, flags);
+               return ret;
+       }
+       backlog = crypto_get_backlog(&dd->queue);
+       async_req = crypto_dequeue_request(&dd->queue);
+       if (async_req)
+               dd->flags |= TDES_FLAGS_BUSY;
+       spin_unlock_irqrestore(&dd->lock, flags);
+
+       if (!async_req)
+               return ret;
+
+       if (backlog)
+               backlog->complete(backlog, -EINPROGRESS);
+
+       req = ablkcipher_request_cast(async_req);
+
+       /* assign new request to device */
+       dd->req = req;
+       dd->total = req->nbytes;
+       dd->in_offset = 0;
+       dd->in_sg = req->src;
+       dd->out_offset = 0;
+       dd->out_sg = req->dst;
+
+       rctx = ablkcipher_request_ctx(req);
+       ctx = crypto_ablkcipher_ctx(crypto_ablkcipher_reqtfm(req));
+       rctx->mode &= TDES_FLAGS_MODE_MASK;
+       dd->flags = (dd->flags & ~TDES_FLAGS_MODE_MASK) | rctx->mode;
+       dd->ctx = ctx;
+       ctx->dd = dd;
+
+       err = atmel_tdes_write_ctrl(dd);
+       if (!err)
+               err = atmel_tdes_crypt_dma_start(dd);
+       if (err) {
+               /* des_task will not finish it, so do it here */
+               atmel_tdes_finish_req(dd, err);
+               tasklet_schedule(&dd->queue_task);
+       }
+
+       return ret;
+}
+
+
+static int atmel_tdes_crypt(struct ablkcipher_request *req, unsigned long mode)
+{
+       struct atmel_tdes_ctx *ctx = crypto_ablkcipher_ctx(
+                       crypto_ablkcipher_reqtfm(req));
+       struct atmel_tdes_reqctx *rctx = ablkcipher_request_ctx(req);
+       struct atmel_tdes_dev *dd;
+
+       if (mode & TDES_FLAGS_CFB8) {
+               if (!IS_ALIGNED(req->nbytes, CFB8_BLOCK_SIZE)) {
+                       pr_err("request size is not exact amount of CFB8 blocks\n");
+                       return -EINVAL;
+               }
+       } else if (mode & TDES_FLAGS_CFB16) {
+               if (!IS_ALIGNED(req->nbytes, CFB16_BLOCK_SIZE)) {
+                       pr_err("request size is not exact amount of CFB16 blocks\n");
+                       return -EINVAL;
+               }
+       } else if (mode & TDES_FLAGS_CFB32) {
+               if (!IS_ALIGNED(req->nbytes, CFB32_BLOCK_SIZE)) {
+                       pr_err("request size is not exact amount of CFB32 blocks\n");
+                       return -EINVAL;
+               }
+       } else if (!IS_ALIGNED(req->nbytes, DES_BLOCK_SIZE)) {
+               pr_err("request size is not exact amount of DES blocks\n");
+               return -EINVAL;
+       }
+
+       dd = atmel_tdes_find_dev(ctx);
+       if (!dd)
+               return -ENODEV;
+
+       rctx->mode = mode;
+
+       return atmel_tdes_handle_queue(dd, req);
+}
+
+static int atmel_des_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
+                          unsigned int keylen)
+{
+       u32 tmp[DES_EXPKEY_WORDS];
+       int err;
+       struct crypto_tfm *ctfm = crypto_ablkcipher_tfm(tfm);
+
+       struct atmel_tdes_ctx *ctx = crypto_ablkcipher_ctx(tfm);
+
+       if (keylen != DES_KEY_SIZE) {
+               crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
+               return -EINVAL;
+       }
+
+       err = des_ekey(tmp, key);
+       if (err == 0 && (ctfm->crt_flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
+               ctfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY;
+               return -EINVAL;
+       }
+
+       memcpy(ctx->key, key, keylen);
+       ctx->keylen = keylen;
+
+       return 0;
+}
+
+static int atmel_tdes_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
+                          unsigned int keylen)
+{
+       struct atmel_tdes_ctx *ctx = crypto_ablkcipher_ctx(tfm);
+       const char *alg_name;
+
+       alg_name = crypto_tfm_alg_name(crypto_ablkcipher_tfm(tfm));
+
+       /*
+        * HW bug in cfb 3-keys mode.
+        */
+       if (strstr(alg_name, "cfb") && (keylen != 2*DES_KEY_SIZE)) {
+               crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
+               return -EINVAL;
+       } else if ((keylen != 2*DES_KEY_SIZE) && (keylen != 3*DES_KEY_SIZE)) {
+               crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
+               return -EINVAL;
+       }
+
+       memcpy(ctx->key, key, keylen);
+       ctx->keylen = keylen;
+
+       return 0;
+}
+
+static int atmel_tdes_ecb_encrypt(struct ablkcipher_request *req)
+{
+       return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT);
+}
+
+static int atmel_tdes_ecb_decrypt(struct ablkcipher_request *req)
+{
+       return atmel_tdes_crypt(req, 0);
+}
+
+static int atmel_tdes_cbc_encrypt(struct ablkcipher_request *req)
+{
+       return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CBC);
+}
+
+static int atmel_tdes_cbc_decrypt(struct ablkcipher_request *req)
+{
+       return atmel_tdes_crypt(req, TDES_FLAGS_CBC);
+}
+static int atmel_tdes_cfb_encrypt(struct ablkcipher_request *req)
+{
+       return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CFB);
+}
+
+static int atmel_tdes_cfb_decrypt(struct ablkcipher_request *req)
+{
+       return atmel_tdes_crypt(req, TDES_FLAGS_CFB);
+}
+
+static int atmel_tdes_cfb8_encrypt(struct ablkcipher_request *req)
+{
+       return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CFB |
+                                               TDES_FLAGS_CFB8);
+}
+
+static int atmel_tdes_cfb8_decrypt(struct ablkcipher_request *req)
+{
+       return atmel_tdes_crypt(req, TDES_FLAGS_CFB | TDES_FLAGS_CFB8);
+}
+
+static int atmel_tdes_cfb16_encrypt(struct ablkcipher_request *req)
+{
+       return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CFB |
+                                               TDES_FLAGS_CFB16);
+}
+
+static int atmel_tdes_cfb16_decrypt(struct ablkcipher_request *req)
+{
+       return atmel_tdes_crypt(req, TDES_FLAGS_CFB | TDES_FLAGS_CFB16);
+}
+
+static int atmel_tdes_cfb32_encrypt(struct ablkcipher_request *req)
+{
+       return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_CFB |
+                                               TDES_FLAGS_CFB32);
+}
+
+static int atmel_tdes_cfb32_decrypt(struct ablkcipher_request *req)
+{
+       return atmel_tdes_crypt(req, TDES_FLAGS_CFB | TDES_FLAGS_CFB32);
+}
+
+static int atmel_tdes_ofb_encrypt(struct ablkcipher_request *req)
+{
+       return atmel_tdes_crypt(req, TDES_FLAGS_ENCRYPT | TDES_FLAGS_OFB);
+}
+
+static int atmel_tdes_ofb_decrypt(struct ablkcipher_request *req)
+{
+       return atmel_tdes_crypt(req, TDES_FLAGS_OFB);
+}
+
+static int atmel_tdes_cra_init(struct crypto_tfm *tfm)
+{
+       tfm->crt_ablkcipher.reqsize = sizeof(struct atmel_tdes_reqctx);
+
+       return 0;
+}
+
+static void atmel_tdes_cra_exit(struct crypto_tfm *tfm)
+{
+}
+
+static struct crypto_alg tdes_algs[] = {
+{
+       .cra_name               = "ecb(des)",
+       .cra_driver_name        = "atmel-ecb-des",
+       .cra_priority           = 100,
+       .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
+       .cra_blocksize          = DES_BLOCK_SIZE,
+       .cra_ctxsize            = sizeof(struct atmel_tdes_ctx),
+       .cra_alignmask          = 0,
+       .cra_type               = &crypto_ablkcipher_type,
+       .cra_module             = THIS_MODULE,
+       .cra_init               = atmel_tdes_cra_init,
+       .cra_exit               = atmel_tdes_cra_exit,
+       .cra_u.ablkcipher = {
+               .min_keysize    = DES_KEY_SIZE,
+               .max_keysize    = DES_KEY_SIZE,
+               .setkey         = atmel_des_setkey,
+               .encrypt        = atmel_tdes_ecb_encrypt,
+               .decrypt        = atmel_tdes_ecb_decrypt,
+       }
+},
+{
+       .cra_name               = "cbc(des)",
+       .cra_driver_name        = "atmel-cbc-des",
+       .cra_priority           = 100,
+       .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
+       .cra_blocksize          = DES_BLOCK_SIZE,
+       .cra_ctxsize            = sizeof(struct atmel_tdes_ctx),
+       .cra_alignmask          = 0,
+       .cra_type               = &crypto_ablkcipher_type,
+       .cra_module             = THIS_MODULE,
+       .cra_init               = atmel_tdes_cra_init,
+       .cra_exit               = atmel_tdes_cra_exit,
+       .cra_u.ablkcipher = {
+               .min_keysize    = DES_KEY_SIZE,
+               .max_keysize    = DES_KEY_SIZE,
+               .ivsize         = DES_BLOCK_SIZE,
+               .setkey         = atmel_des_setkey,
+               .encrypt        = atmel_tdes_cbc_encrypt,
+               .decrypt        = atmel_tdes_cbc_decrypt,
+       }
+},
+{
+       .cra_name               = "cfb(des)",
+       .cra_driver_name        = "atmel-cfb-des",
+       .cra_priority           = 100,
+       .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
+       .cra_blocksize          = DES_BLOCK_SIZE,
+       .cra_ctxsize            = sizeof(struct atmel_tdes_ctx),
+       .cra_alignmask          = 0,
+       .cra_type               = &crypto_ablkcipher_type,
+       .cra_module             = THIS_MODULE,
+       .cra_init               = atmel_tdes_cra_init,
+       .cra_exit               = atmel_tdes_cra_exit,
+       .cra_u.ablkcipher = {
+               .min_keysize    = DES_KEY_SIZE,
+               .max_keysize    = DES_KEY_SIZE,
+               .ivsize         = DES_BLOCK_SIZE,
+               .setkey         = atmel_des_setkey,
+               .encrypt        = atmel_tdes_cfb_encrypt,
+               .decrypt        = atmel_tdes_cfb_decrypt,
+       }
+},
+{
+       .cra_name               = "cfb8(des)",
+       .cra_driver_name        = "atmel-cfb8-des",
+       .cra_priority           = 100,
+       .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
+       .cra_blocksize          = CFB8_BLOCK_SIZE,
+       .cra_ctxsize            = sizeof(struct atmel_tdes_ctx),
+       .cra_alignmask          = 0,
+       .cra_type               = &crypto_ablkcipher_type,
+       .cra_module             = THIS_MODULE,
+       .cra_init               = atmel_tdes_cra_init,
+       .cra_exit               = atmel_tdes_cra_exit,
+       .cra_u.ablkcipher = {
+               .min_keysize    = DES_KEY_SIZE,
+               .max_keysize    = DES_KEY_SIZE,
+               .ivsize         = DES_BLOCK_SIZE,
+               .setkey         = atmel_des_setkey,
+               .encrypt        = atmel_tdes_cfb8_encrypt,
+               .decrypt        = atmel_tdes_cfb8_decrypt,
+       }
+},
+{
+       .cra_name               = "cfb16(des)",
+       .cra_driver_name        = "atmel-cfb16-des",
+       .cra_priority           = 100,
+       .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
+       .cra_blocksize          = CFB16_BLOCK_SIZE,
+       .cra_ctxsize            = sizeof(struct atmel_tdes_ctx),
+       .cra_alignmask          = 0,
+       .cra_type               = &crypto_ablkcipher_type,
+       .cra_module             = THIS_MODULE,
+       .cra_init               = atmel_tdes_cra_init,
+       .cra_exit               = atmel_tdes_cra_exit,
+       .cra_u.ablkcipher = {
+               .min_keysize    = DES_KEY_SIZE,
+               .max_keysize    = DES_KEY_SIZE,
+               .ivsize         = DES_BLOCK_SIZE,
+               .setkey         = atmel_des_setkey,
+               .encrypt        = atmel_tdes_cfb16_encrypt,
+               .decrypt        = atmel_tdes_cfb16_decrypt,
+       }
+},
+{
+       .cra_name               = "cfb32(des)",
+       .cra_driver_name        = "atmel-cfb32-des",
+       .cra_priority           = 100,
+       .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
+       .cra_blocksize          = CFB32_BLOCK_SIZE,
+       .cra_ctxsize            = sizeof(struct atmel_tdes_ctx),
+       .cra_alignmask          = 0,
+       .cra_type               = &crypto_ablkcipher_type,
+       .cra_module             = THIS_MODULE,
+       .cra_init               = atmel_tdes_cra_init,
+       .cra_exit               = atmel_tdes_cra_exit,
+       .cra_u.ablkcipher = {
+               .min_keysize    = DES_KEY_SIZE,
+               .max_keysize    = DES_KEY_SIZE,
+               .ivsize         = DES_BLOCK_SIZE,
+               .setkey         = atmel_des_setkey,
+               .encrypt        = atmel_tdes_cfb32_encrypt,
+               .decrypt        = atmel_tdes_cfb32_decrypt,
+       }
+},
+{
+       .cra_name               = "ofb(des)",
+       .cra_driver_name        = "atmel-ofb-des",
+       .cra_priority           = 100,
+       .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
+       .cra_blocksize          = DES_BLOCK_SIZE,
+       .cra_ctxsize            = sizeof(struct atmel_tdes_ctx),
+       .cra_alignmask          = 0,
+       .cra_type               = &crypto_ablkcipher_type,
+       .cra_module             = THIS_MODULE,
+       .cra_init               = atmel_tdes_cra_init,
+       .cra_exit               = atmel_tdes_cra_exit,
+       .cra_u.ablkcipher = {
+               .min_keysize    = DES_KEY_SIZE,
+               .max_keysize    = DES_KEY_SIZE,
+               .ivsize         = DES_BLOCK_SIZE,
+               .setkey         = atmel_des_setkey,
+               .encrypt        = atmel_tdes_ofb_encrypt,
+               .decrypt        = atmel_tdes_ofb_decrypt,
+       }
+},
+{
+       .cra_name               = "ecb(des3_ede)",
+       .cra_driver_name        = "atmel-ecb-tdes",
+       .cra_priority           = 100,
+       .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
+       .cra_blocksize          = DES_BLOCK_SIZE,
+       .cra_ctxsize            = sizeof(struct atmel_tdes_ctx),
+       .cra_alignmask          = 0,
+       .cra_type               = &crypto_ablkcipher_type,
+       .cra_module             = THIS_MODULE,
+       .cra_init               = atmel_tdes_cra_init,
+       .cra_exit               = atmel_tdes_cra_exit,
+       .cra_u.ablkcipher = {
+               .min_keysize    = 2 * DES_KEY_SIZE,
+               .max_keysize    = 3 * DES_KEY_SIZE,
+               .setkey         = atmel_tdes_setkey,
+               .encrypt        = atmel_tdes_ecb_encrypt,
+               .decrypt        = atmel_tdes_ecb_decrypt,
+       }
+},
+{
+       .cra_name               = "cbc(des3_ede)",
+       .cra_driver_name        = "atmel-cbc-tdes",
+       .cra_priority           = 100,
+       .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
+       .cra_blocksize          = DES_BLOCK_SIZE,
+       .cra_ctxsize            = sizeof(struct atmel_tdes_ctx),
+       .cra_alignmask          = 0,
+       .cra_type               = &crypto_ablkcipher_type,
+       .cra_module             = THIS_MODULE,
+       .cra_init               = atmel_tdes_cra_init,
+       .cra_exit               = atmel_tdes_cra_exit,
+       .cra_u.ablkcipher = {
+               .min_keysize    = 2*DES_KEY_SIZE,
+               .max_keysize    = 3*DES_KEY_SIZE,
+               .ivsize         = DES_BLOCK_SIZE,
+               .setkey         = atmel_tdes_setkey,
+               .encrypt        = atmel_tdes_cbc_encrypt,
+               .decrypt        = atmel_tdes_cbc_decrypt,
+       }
+},
+{
+       .cra_name               = "cfb(des3_ede)",
+       .cra_driver_name        = "atmel-cfb-tdes",
+       .cra_priority           = 100,
+       .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
+       .cra_blocksize          = DES_BLOCK_SIZE,
+       .cra_ctxsize            = sizeof(struct atmel_tdes_ctx),
+       .cra_alignmask          = 0,
+       .cra_type               = &crypto_ablkcipher_type,
+       .cra_module             = THIS_MODULE,
+       .cra_init               = atmel_tdes_cra_init,
+       .cra_exit               = atmel_tdes_cra_exit,
+       .cra_u.ablkcipher = {
+               .min_keysize    = 2*DES_KEY_SIZE,
+               .max_keysize    = 2*DES_KEY_SIZE,
+               .ivsize         = DES_BLOCK_SIZE,
+               .setkey         = atmel_tdes_setkey,
+               .encrypt        = atmel_tdes_cfb_encrypt,
+               .decrypt        = atmel_tdes_cfb_decrypt,
+       }
+},
+{
+       .cra_name               = "cfb8(des3_ede)",
+       .cra_driver_name        = "atmel-cfb8-tdes",
+       .cra_priority           = 100,
+       .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
+       .cra_blocksize          = CFB8_BLOCK_SIZE,
+       .cra_ctxsize            = sizeof(struct atmel_tdes_ctx),
+       .cra_alignmask          = 0,
+       .cra_type               = &crypto_ablkcipher_type,
+       .cra_module             = THIS_MODULE,
+       .cra_init               = atmel_tdes_cra_init,
+       .cra_exit               = atmel_tdes_cra_exit,
+       .cra_u.ablkcipher = {
+               .min_keysize    = 2*DES_KEY_SIZE,
+               .max_keysize    = 2*DES_KEY_SIZE,
+               .ivsize         = DES_BLOCK_SIZE,
+               .setkey         = atmel_tdes_setkey,
+               .encrypt        = atmel_tdes_cfb8_encrypt,
+               .decrypt        = atmel_tdes_cfb8_decrypt,
+       }
+},
+{
+       .cra_name               = "cfb16(des3_ede)",
+       .cra_driver_name        = "atmel-cfb16-tdes",
+       .cra_priority           = 100,
+       .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
+       .cra_blocksize          = CFB16_BLOCK_SIZE,
+       .cra_ctxsize            = sizeof(struct atmel_tdes_ctx),
+       .cra_alignmask          = 0,
+       .cra_type               = &crypto_ablkcipher_type,
+       .cra_module             = THIS_MODULE,
+       .cra_init               = atmel_tdes_cra_init,
+       .cra_exit               = atmel_tdes_cra_exit,
+       .cra_u.ablkcipher = {
+               .min_keysize    = 2*DES_KEY_SIZE,
+               .max_keysize    = 2*DES_KEY_SIZE,
+               .ivsize         = DES_BLOCK_SIZE,
+               .setkey         = atmel_tdes_setkey,
+               .encrypt        = atmel_tdes_cfb16_encrypt,
+               .decrypt        = atmel_tdes_cfb16_decrypt,
+       }
+},
+{
+       .cra_name               = "cfb32(des3_ede)",
+       .cra_driver_name        = "atmel-cfb32-tdes",
+       .cra_priority           = 100,
+       .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
+       .cra_blocksize          = CFB32_BLOCK_SIZE,
+       .cra_ctxsize            = sizeof(struct atmel_tdes_ctx),
+       .cra_alignmask          = 0,
+       .cra_type               = &crypto_ablkcipher_type,
+       .cra_module             = THIS_MODULE,
+       .cra_init               = atmel_tdes_cra_init,
+       .cra_exit               = atmel_tdes_cra_exit,
+       .cra_u.ablkcipher = {
+               .min_keysize    = 2*DES_KEY_SIZE,
+               .max_keysize    = 2*DES_KEY_SIZE,
+               .ivsize         = DES_BLOCK_SIZE,
+               .setkey         = atmel_tdes_setkey,
+               .encrypt        = atmel_tdes_cfb32_encrypt,
+               .decrypt        = atmel_tdes_cfb32_decrypt,
+       }
+},
+{
+       .cra_name               = "ofb(des3_ede)",
+       .cra_driver_name        = "atmel-ofb-tdes",
+       .cra_priority           = 100,
+       .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
+       .cra_blocksize          = DES_BLOCK_SIZE,
+       .cra_ctxsize            = sizeof(struct atmel_tdes_ctx),
+       .cra_alignmask          = 0,
+       .cra_type               = &crypto_ablkcipher_type,
+       .cra_module             = THIS_MODULE,
+       .cra_init               = atmel_tdes_cra_init,
+       .cra_exit               = atmel_tdes_cra_exit,
+       .cra_u.ablkcipher = {
+               .min_keysize    = 2*DES_KEY_SIZE,
+               .max_keysize    = 3*DES_KEY_SIZE,
+               .ivsize         = DES_BLOCK_SIZE,
+               .setkey         = atmel_tdes_setkey,
+               .encrypt        = atmel_tdes_ofb_encrypt,
+               .decrypt        = atmel_tdes_ofb_decrypt,
+       }
+},
+};
+
+static void atmel_tdes_queue_task(unsigned long data)
+{
+       struct atmel_tdes_dev *dd = (struct atmel_tdes_dev *)data;
+
+       atmel_tdes_handle_queue(dd, NULL);
+}
+
+static void atmel_tdes_done_task(unsigned long data)
+{
+       struct atmel_tdes_dev *dd = (struct atmel_tdes_dev *) data;
+       int err;
+
+       err = atmel_tdes_crypt_dma_stop(dd);
+
+       err = dd->err ? : err;
+
+       if (dd->total && !err) {
+               err = atmel_tdes_crypt_dma_start(dd);
+               if (!err)
+                       return;
+       }
+
+       atmel_tdes_finish_req(dd, err);
+       atmel_tdes_handle_queue(dd, NULL);
+}
+
+static irqreturn_t atmel_tdes_irq(int irq, void *dev_id)
+{
+       struct atmel_tdes_dev *tdes_dd = dev_id;
+       u32 reg;
+
+       reg = atmel_tdes_read(tdes_dd, TDES_ISR);
+       if (reg & atmel_tdes_read(tdes_dd, TDES_IMR)) {
+               atmel_tdes_write(tdes_dd, TDES_IDR, reg);
+               if (TDES_FLAGS_BUSY & tdes_dd->flags)
+                       tasklet_schedule(&tdes_dd->done_task);
+               else
+                       dev_warn(tdes_dd->dev, "TDES interrupt when no active requests.\n");
+               return IRQ_HANDLED;
+       }
+
+       return IRQ_NONE;
+}
+
+static void atmel_tdes_unregister_algs(struct atmel_tdes_dev *dd)
+{
+       int i;
+
+       for (i = 0; i < ARRAY_SIZE(tdes_algs); i++)
+               crypto_unregister_alg(&tdes_algs[i]);
+}
+
+static int atmel_tdes_register_algs(struct atmel_tdes_dev *dd)
+{
+       int err, i, j;
+
+       for (i = 0; i < ARRAY_SIZE(tdes_algs); i++) {
+               INIT_LIST_HEAD(&tdes_algs[i].cra_list);
+               err = crypto_register_alg(&tdes_algs[i]);
+               if (err)
+                       goto err_tdes_algs;
+       }
+
+       return 0;
+
+err_tdes_algs:
+       for (j = 0; j < i; j++)
+               crypto_unregister_alg(&tdes_algs[j]);
+
+       return err;
+}
+
+static int __devinit atmel_tdes_probe(struct platform_device *pdev)
+{
+       struct atmel_tdes_dev *tdes_dd;
+       struct device *dev = &pdev->dev;
+       struct resource *tdes_res;
+       unsigned long tdes_phys_size;
+       int err;
+
+       tdes_dd = kzalloc(sizeof(struct atmel_tdes_dev), GFP_KERNEL);
+       if (tdes_dd == NULL) {
+               dev_err(dev, "unable to alloc data struct.\n");
+               err = -ENOMEM;
+               goto tdes_dd_err;
+       }
+
+       tdes_dd->dev = dev;
+
+       platform_set_drvdata(pdev, tdes_dd);
+
+       INIT_LIST_HEAD(&tdes_dd->list);
+
+       tasklet_init(&tdes_dd->done_task, atmel_tdes_done_task,
+                                       (unsigned long)tdes_dd);
+       tasklet_init(&tdes_dd->queue_task, atmel_tdes_queue_task,
+                                       (unsigned long)tdes_dd);
+
+       crypto_init_queue(&tdes_dd->queue, ATMEL_TDES_QUEUE_LENGTH);
+
+       tdes_dd->irq = -1;
+
+       /* Get the base address */
+       tdes_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       if (!tdes_res) {
+               dev_err(dev, "no MEM resource info\n");
+               err = -ENODEV;
+               goto res_err;
+       }
+       tdes_dd->phys_base = tdes_res->start;
+       tdes_phys_size = resource_size(tdes_res);
+
+       /* Get the IRQ */
+       tdes_dd->irq = platform_get_irq(pdev,  0);
+       if (tdes_dd->irq < 0) {
+               dev_err(dev, "no IRQ resource info\n");
+               err = tdes_dd->irq;
+               goto res_err;
+       }
+
+       err = request_irq(tdes_dd->irq, atmel_tdes_irq, IRQF_SHARED,
+                       "atmel-tdes", tdes_dd);
+       if (err) {
+               dev_err(dev, "unable to request tdes irq.\n");
+               goto tdes_irq_err;
+       }
+
+       /* Initializing the clock */
+       tdes_dd->iclk = clk_get(&pdev->dev, NULL);
+       if (IS_ERR(tdes_dd->iclk)) {
+               dev_err(dev, "clock intialization failed.\n");
+               err = PTR_ERR(tdes_dd->iclk);
+               goto clk_err;
+       }
+
+       tdes_dd->io_base = ioremap(tdes_dd->phys_base, tdes_phys_size);
+       if (!tdes_dd->io_base) {
+               dev_err(dev, "can't ioremap\n");
+               err = -ENOMEM;
+               goto tdes_io_err;
+       }
+
+       err = atmel_tdes_dma_init(tdes_dd);
+       if (err)
+               goto err_tdes_dma;
+
+       spin_lock(&atmel_tdes.lock);
+       list_add_tail(&tdes_dd->list, &atmel_tdes.dev_list);
+       spin_unlock(&atmel_tdes.lock);
+
+       err = atmel_tdes_register_algs(tdes_dd);
+       if (err)
+               goto err_algs;
+
+       dev_info(dev, "Atmel DES/TDES\n");
+
+       return 0;
+
+err_algs:
+       spin_lock(&atmel_tdes.lock);
+       list_del(&tdes_dd->list);
+       spin_unlock(&atmel_tdes.lock);
+       atmel_tdes_dma_cleanup(tdes_dd);
+err_tdes_dma:
+       iounmap(tdes_dd->io_base);
+tdes_io_err:
+       clk_put(tdes_dd->iclk);
+clk_err:
+       free_irq(tdes_dd->irq, tdes_dd);
+tdes_irq_err:
+res_err:
+       tasklet_kill(&tdes_dd->done_task);
+       tasklet_kill(&tdes_dd->queue_task);
+       kfree(tdes_dd);
+       tdes_dd = NULL;
+tdes_dd_err:
+       dev_err(dev, "initialization failed.\n");
+
+       return err;
+}
+
+static int __devexit atmel_tdes_remove(struct platform_device *pdev)
+{
+       static struct atmel_tdes_dev *tdes_dd;
+
+       tdes_dd = platform_get_drvdata(pdev);
+       if (!tdes_dd)
+               return -ENODEV;
+       spin_lock(&atmel_tdes.lock);
+       list_del(&tdes_dd->list);
+       spin_unlock(&atmel_tdes.lock);
+
+       atmel_tdes_unregister_algs(tdes_dd);
+
+       tasklet_kill(&tdes_dd->done_task);
+       tasklet_kill(&tdes_dd->queue_task);
+
+       atmel_tdes_dma_cleanup(tdes_dd);
+
+       iounmap(tdes_dd->io_base);
+
+       clk_put(tdes_dd->iclk);
+
+       if (tdes_dd->irq >= 0)
+               free_irq(tdes_dd->irq, tdes_dd);
+
+       kfree(tdes_dd);
+       tdes_dd = NULL;
+
+       return 0;
+}
+
+static struct platform_driver atmel_tdes_driver = {
+       .probe          = atmel_tdes_probe,
+       .remove         = __devexit_p(atmel_tdes_remove),
+       .driver         = {
+               .name   = "atmel_tdes",
+               .owner  = THIS_MODULE,
+       },
+};
+
+module_platform_driver(atmel_tdes_driver);
+
+MODULE_DESCRIPTION("Atmel DES/TDES hw acceleration support.");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Nicolas Royer - Eukréa Electromatique");