drivers/crypto/omap-aes.c

   1 /*
   2  * Cryptographic API.
   3  *
   4  * Support for OMAP AES HW acceleration.
   5  *
   6  * Copyright (c) 2010 Nokia Corporation
   7  * Author: Dmitry Kasatkin <[email protected]>
   8  * Copyright (c) 2011 Texas Instruments Incorporated
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as published
  12  * by the Free Software Foundation.
  13  *
  14  */
  15
  16 #define pr_fmt(fmt) "%s: " fmt, __func__
  17
  18 #include <linux/err.h>
  19 #include <linux/module.h>
  20 #include <linux/init.h>
  21 #include <linux/errno.h>
  22 #include <linux/kernel.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/scatterlist.h>
  25 #include <linux/dma-mapping.h>
  26 #include <linux/dmaengine.h>
  27 #include <linux/omap-dma.h>
  28 #include <linux/pm_runtime.h>
  29 #include <linux/of.h>
  30 #include <linux/of_device.h>
  31 #include <linux/of_address.h>
  32 #include <linux/io.h>
  33 #include <linux/crypto.h>
  34 #include <linux/interrupt.h>
  35 #include <crypto/scatterwalk.h>
  36 #include <crypto/aes.h>
  37
  38 #define DST_MAXBURST                    4
  39 #define DMA_MIN                         (DST_MAXBURST * sizeof(u32))
  40
  41 /* OMAP TRM gives bitfields as start:end, where start is the higher bit
  42    number. For example 7:0 */
  43 #define FLD_MASK(start, end)    (((1 << ((start) - (end) + 1)) - 1) << (end))
  44 #define FLD_VAL(val, start, end) (((val) << (end)) & FLD_MASK(start, end))
  45
  46 #define AES_REG_KEY(dd, x)              ((dd)->pdata->key_ofs - \
  47                                                 ((x ^ 0x01) * 0x04))
  48 #define AES_REG_IV(dd, x)               ((dd)->pdata->iv_ofs + ((x) * 0x04))
  49
  50 #define AES_REG_CTRL(dd)                ((dd)->pdata->ctrl_ofs)
  51 #define AES_REG_CTRL_CTR_WIDTH_MASK     (3 << 7)
  52 #define AES_REG_CTRL_CTR_WIDTH_32               (0 << 7)
  53 #define AES_REG_CTRL_CTR_WIDTH_64               (1 << 7)
  54 #define AES_REG_CTRL_CTR_WIDTH_96               (2 << 7)
  55 #define AES_REG_CTRL_CTR_WIDTH_128              (3 << 7)
  56 #define AES_REG_CTRL_CTR                (1 << 6)
  57 #define AES_REG_CTRL_CBC                (1 << 5)
  58 #define AES_REG_CTRL_KEY_SIZE           (3 << 3)
  59 #define AES_REG_CTRL_DIRECTION          (1 << 2)
  60 #define AES_REG_CTRL_INPUT_READY        (1 << 1)
  61 #define AES_REG_CTRL_OUTPUT_READY       (1 << 0)
  62
  63 #define AES_REG_DATA_N(dd, x)           ((dd)->pdata->data_ofs + ((x) * 0x04))
  64
  65 #define AES_REG_REV(dd)                 ((dd)->pdata->rev_ofs)
  66
  67 #define AES_REG_MASK(dd)                ((dd)->pdata->mask_ofs)
  68 #define AES_REG_MASK_SIDLE              (1 << 6)
  69 #define AES_REG_MASK_START              (1 << 5)
  70 #define AES_REG_MASK_DMA_OUT_EN         (1 << 3)
  71 #define AES_REG_MASK_DMA_IN_EN          (1 << 2)
  72 #define AES_REG_MASK_SOFTRESET          (1 << 1)
  73 #define AES_REG_AUTOIDLE                (1 << 0)
  74
  75 #define AES_REG_LENGTH_N(x)             (0x54 + ((x) * 0x04))
  76
  77 #define DEFAULT_TIMEOUT         (5*HZ)
  78
  79 #define FLAGS_MODE_MASK         0x000f
  80 #define FLAGS_ENCRYPT           BIT(0)
  81 #define FLAGS_CBC               BIT(1)
  82 #define FLAGS_GIV               BIT(2)
  83 #define FLAGS_CTR               BIT(3)
  84
  85 #define FLAGS_INIT              BIT(4)
  86 #define FLAGS_FAST              BIT(5)
  87 #define FLAGS_BUSY              BIT(6)
  88
  89 struct omap_aes_ctx {
  90         struct omap_aes_dev *dd;
  91
  92         int             keylen;
  93         u32             key[AES_KEYSIZE_256 / sizeof(u32)];
  94         unsigned long   flags;
  95 };
  96
  97 struct omap_aes_reqctx {
  98         unsigned long mode;
  99 };
 100
 101 #define OMAP_AES_QUEUE_LENGTH   1
 102 #define OMAP_AES_CACHE_SIZE     0
 103
 104 struct omap_aes_algs_info {
 105         struct crypto_alg       *algs_list;
 106         unsigned int            size;
 107         unsigned int            registered;
 108 };
 109
 110 struct omap_aes_pdata {
 111         struct omap_aes_algs_info       *algs_info;
 112         unsigned int    algs_info_size;
 113
 114         void            (*trigger)(struct omap_aes_dev *dd, int length);
 115
 116         u32             key_ofs;
 117         u32             iv_ofs;
 118         u32             ctrl_ofs;
 119         u32             data_ofs;
 120         u32             rev_ofs;
 121         u32             mask_ofs;
 122
 123         u32             dma_enable_in;
 124         u32             dma_enable_out;
 125         u32             dma_start;
 126
 127         u32             major_mask;
 128         u32             major_shift;
 129         u32             minor_mask;
 130         u32             minor_shift;
 131 };
 132
 133 struct omap_aes_dev {
 134         struct list_head        list;
 135         unsigned long           phys_base;
 136         void __iomem            *io_base;
 137         struct omap_aes_ctx     *ctx;
 138         struct device           *dev;
 139         unsigned long           flags;
 140         int                     err;
 141
 142         spinlock_t              lock;
 143         struct crypto_queue     queue;
 144
 145         struct tasklet_struct   done_task;
 146         struct tasklet_struct   queue_task;
 147
 148         struct ablkcipher_request       *req;
 149         size_t                          total;
 150         struct scatterlist              *in_sg;
 151         struct scatterlist              in_sgl;
 152         size_t                          in_offset;
 153         struct scatterlist              *out_sg;
 154         struct scatterlist              out_sgl;
 155         size_t                          out_offset;
 156
 157         size_t                  buflen;
 158         void                    *buf_in;
 159         size_t                  dma_size;
 160         int                     dma_in;
 161         struct dma_chan         *dma_lch_in;
 162         dma_addr_t              dma_addr_in;
 163         void                    *buf_out;
 164         int                     dma_out;
 165         struct dma_chan         *dma_lch_out;
 166         dma_addr_t              dma_addr_out;
 167
 168         const struct omap_aes_pdata     *pdata;
 169 };
 170
 171 /* keep registered devices data here */
 172 static LIST_HEAD(dev_list);
 173 static DEFINE_SPINLOCK(list_lock);
 174
 175 static inline u32 omap_aes_read(struct omap_aes_dev *dd, u32 offset)
 176 {
 177         return __raw_readl(dd->io_base + offset);
 178 }
 179
 180 static inline void omap_aes_write(struct omap_aes_dev *dd, u32 offset,
 181                                   u32 value)
 182 {
 183         __raw_writel(value, dd->io_base + offset);
 184 }
 185
 186 static inline void omap_aes_write_mask(struct omap_aes_dev *dd, u32 offset,
 187                                         u32 value, u32 mask)
 188 {
 189         u32 val;
 190
 191         val = omap_aes_read(dd, offset);
 192         val &= ~mask;
 193         val |= value;
 194         omap_aes_write(dd, offset, val);
 195 }
 196
 197 static void omap_aes_write_n(struct omap_aes_dev *dd, u32 offset,
 198                                         u32 *value, int count)
 199 {
 200         for (; count--; value++, offset += 4)
 201                 omap_aes_write(dd, offset, *value);
 202 }
 203
 204 static int omap_aes_hw_init(struct omap_aes_dev *dd)
 205 {
 206         if (!(dd->flags & FLAGS_INIT)) {
 207                 dd->flags |= FLAGS_INIT;
 208                 dd->err = 0;
 209         }
 210
 211         return 0;
 212 }
 213
 214 static int omap_aes_write_ctrl(struct omap_aes_dev *dd)
 215 {
 216         unsigned int key32;
 217         int i, err;
 218         u32 val, mask = 0;
 219
 220         err = omap_aes_hw_init(dd);
 221         if (err)
 222                 return err;
 223
 224         key32 = dd->ctx->keylen / sizeof(u32);
 225
 226         /* it seems a key should always be set even if it has not changed */
 227         for (i = 0; i < key32; i++) {
 228                 omap_aes_write(dd, AES_REG_KEY(dd, i),
 229                         __le32_to_cpu(dd->ctx->key[i]));
 230         }
 231
 232         if ((dd->flags & (FLAGS_CBC | FLAGS_CTR)) && dd->req->info)
 233                 omap_aes_write_n(dd, AES_REG_IV(dd, 0), dd->req->info, 4);
 234
 235         val = FLD_VAL(((dd->ctx->keylen >> 3) - 1), 4, 3);
 236         if (dd->flags & FLAGS_CBC)
 237                 val |= AES_REG_CTRL_CBC;
 238         if (dd->flags & FLAGS_CTR) {
 239                 val |= AES_REG_CTRL_CTR | AES_REG_CTRL_CTR_WIDTH_32;
 240                 mask = AES_REG_CTRL_CTR | AES_REG_CTRL_CTR_WIDTH_MASK;
 241         }
 242         if (dd->flags & FLAGS_ENCRYPT)
 243                 val |= AES_REG_CTRL_DIRECTION;
 244
 245         mask |= AES_REG_CTRL_CBC | AES_REG_CTRL_DIRECTION |
 246                         AES_REG_CTRL_KEY_SIZE;
 247
 248         omap_aes_write_mask(dd, AES_REG_CTRL(dd), val, mask);
 249
 250         return 0;
 251 }
 252
 253 static void omap_aes_dma_trigger_omap2(struct omap_aes_dev *dd, int length)
 254 {
 255         u32 mask, val;
 256
 257         val = dd->pdata->dma_start;
 258
 259         if (dd->dma_lch_out != NULL)
 260                 val |= dd->pdata->dma_enable_out;
 261         if (dd->dma_lch_in != NULL)
 262                 val |= dd->pdata->dma_enable_in;
 263
 264         mask = dd->pdata->dma_enable_out | dd->pdata->dma_enable_in |
 265                dd->pdata->dma_start;
 266
 267         omap_aes_write_mask(dd, AES_REG_MASK(dd), val, mask);
 268
 269 }
 270
 271 static void omap_aes_dma_trigger_omap4(struct omap_aes_dev *dd, int length)
 272 {
 273         omap_aes_write(dd, AES_REG_LENGTH_N(0), length);
 274         omap_aes_write(dd, AES_REG_LENGTH_N(1), 0);
 275
 276         omap_aes_dma_trigger_omap2(dd, length);
 277 }
 278
 279 static void omap_aes_dma_stop(struct omap_aes_dev *dd)
 280 {
 281         u32 mask;
 282
 283         mask = dd->pdata->dma_enable_out | dd->pdata->dma_enable_in |
 284                dd->pdata->dma_start;
 285
 286         omap_aes_write_mask(dd, AES_REG_MASK(dd), 0, mask);
 287 }
 288
 289 static struct omap_aes_dev *omap_aes_find_dev(struct omap_aes_ctx *ctx)
 290 {
 291         struct omap_aes_dev *dd = NULL, *tmp;
 292
 293         spin_lock_bh(&list_lock);
 294         if (!ctx->dd) {
 295                 list_for_each_entry(tmp, &dev_list, list) {
 296                         /* FIXME: take fist available aes core */
 297                         dd = tmp;
 298                         break;
 299                 }
 300                 ctx->dd = dd;
 301         } else {
 302                 /* already found before */
 303                 dd = ctx->dd;
 304         }
 305         spin_unlock_bh(&list_lock);
 306
 307         return dd;
 308 }
 309
 310 static void omap_aes_dma_out_callback(void *data)
 311 {
 312         struct omap_aes_dev *dd = data;
 313
 314         /* dma_lch_out - completed */
 315         tasklet_schedule(&dd->done_task);
 316 }
 317
 318 static int omap_aes_dma_init(struct omap_aes_dev *dd)
 319 {
 320         int err = -ENOMEM;
 321         dma_cap_mask_t mask;
 322
 323         dd->dma_lch_out = NULL;
 324         dd->dma_lch_in = NULL;
 325
 326         dd->buf_in = (void *)__get_free_pages(GFP_KERNEL, OMAP_AES_CACHE_SIZE);
 327         dd->buf_out = (void *)__get_free_pages(GFP_KERNEL, OMAP_AES_CACHE_SIZE);
 328         dd->buflen = PAGE_SIZE << OMAP_AES_CACHE_SIZE;
 329         dd->buflen &= ~(AES_BLOCK_SIZE - 1);
 330
 331         if (!dd->buf_in || !dd->buf_out) {
 332                 dev_err(dd->dev, "unable to alloc pages.\n");
 333                 goto err_alloc;
 334         }
 335
 336         /* MAP here */
 337         dd->dma_addr_in = dma_map_single(dd->dev, dd->buf_in, dd->buflen,
 338                                          DMA_TO_DEVICE);
 339         if (dma_mapping_error(dd->dev, dd->dma_addr_in)) {
 340                 dev_err(dd->dev, "dma %d bytes error\n", dd->buflen);
 341                 err = -EINVAL;
 342                 goto err_map_in;
 343         }
 344
 345         dd->dma_addr_out = dma_map_single(dd->dev, dd->buf_out, dd->buflen,
 346                                           DMA_FROM_DEVICE);
 347         if (dma_mapping_error(dd->dev, dd->dma_addr_out)) {
 348                 dev_err(dd->dev, "dma %d bytes error\n", dd->buflen);
 349                 err = -EINVAL;
 350                 goto err_map_out;
 351         }
 352
 353         dma_cap_zero(mask);
 354         dma_cap_set(DMA_SLAVE, mask);
 355
 356         dd->dma_lch_in = dma_request_slave_channel_compat(mask,
 357                                                           omap_dma_filter_fn,
 358                                                           &dd->dma_in,
 359                                                           dd->dev, "rx");
 360         if (!dd->dma_lch_in) {
 361                 dev_err(dd->dev, "Unable to request in DMA channel\n");
 362                 goto err_dma_in;
 363         }
 364
 365         dd->dma_lch_out = dma_request_slave_channel_compat(mask,
 366                                                            omap_dma_filter_fn,
 367                                                            &dd->dma_out,
 368                                                            dd->dev, "tx");
 369         if (!dd->dma_lch_out) {
 370                 dev_err(dd->dev, "Unable to request out DMA channel\n");
 371                 goto err_dma_out;
 372         }
 373
 374         return 0;
 375
 376 err_dma_out:
 377         dma_release_channel(dd->dma_lch_in);
 378 err_dma_in:
 379         dma_unmap_single(dd->dev, dd->dma_addr_out, dd->buflen,
 380                          DMA_FROM_DEVICE);
 381 err_map_out:
 382         dma_unmap_single(dd->dev, dd->dma_addr_in, dd->buflen, DMA_TO_DEVICE);
 383 err_map_in:
 384         free_pages((unsigned long)dd->buf_out, OMAP_AES_CACHE_SIZE);
 385         free_pages((unsigned long)dd->buf_in, OMAP_AES_CACHE_SIZE);
 386 err_alloc:
 387         if (err)
 388                 pr_err("error: %d\n", err);
 389         return err;
 390 }
 391
 392 static void omap_aes_dma_cleanup(struct omap_aes_dev *dd)
 393 {
 394         dma_release_channel(dd->dma_lch_out);
 395         dma_release_channel(dd->dma_lch_in);
 396         dma_unmap_single(dd->dev, dd->dma_addr_out, dd->buflen,
 397                          DMA_FROM_DEVICE);
 398         dma_unmap_single(dd->dev, dd->dma_addr_in, dd->buflen, DMA_TO_DEVICE);
 399         free_pages((unsigned long)dd->buf_out, OMAP_AES_CACHE_SIZE);
 400         free_pages((unsigned long)dd->buf_in, OMAP_AES_CACHE_SIZE);
 401 }
 402
 403 static void sg_copy_buf(void *buf, struct scatterlist *sg,
 404                               unsigned int start, unsigned int nbytes, int out)
 405 {
 406         struct scatter_walk walk;
 407
 408         if (!nbytes)
 409                 return;
 410
 411         scatterwalk_start(&walk, sg);
 412         scatterwalk_advance(&walk, start);
 413         scatterwalk_copychunks(buf, &walk, nbytes, out);
 414         scatterwalk_done(&walk, out, 0);
 415 }
 416
 417 static int sg_copy(struct scatterlist **sg, size_t *offset, void *buf,
 418                    size_t buflen, size_t total, int out)
 419 {
 420         unsigned int count, off = 0;
 421
 422         while (buflen && total) {
 423                 count = min((*sg)->length - *offset, total);
 424                 count = min(count, buflen);
 425
 426                 if (!count)
 427                         return off;
 428
 429                 /*
 430                  * buflen and total are AES_BLOCK_SIZE size aligned,
 431                  * so count should be also aligned
 432                  */
 433
 434                 sg_copy_buf(buf + off, *sg, *offset, count, out);
 435
 436                 off += count;
 437                 buflen -= count;
 438                 *offset += count;
 439                 total -= count;
 440
 441                 if (*offset == (*sg)->length) {
 442                         *sg = sg_next(*sg);
 443                         if (*sg)
 444                                 *offset = 0;
 445                         else
 446                                 total = 0;
 447                 }
 448         }
 449
 450         return off;
 451 }
 452
 453 static int omap_aes_crypt_dma(struct crypto_tfm *tfm,
 454                 struct scatterlist *in_sg, struct scatterlist *out_sg)
 455 {
 456         struct omap_aes_ctx *ctx = crypto_tfm_ctx(tfm);
 457         struct omap_aes_dev *dd = ctx->dd;
 458         struct dma_async_tx_descriptor *tx_in, *tx_out;
 459         struct dma_slave_config cfg;
 460         dma_addr_t dma_addr_in = sg_dma_address(in_sg);
 461         int ret, length = sg_dma_len(in_sg);
 462
 463         pr_debug("len: %d\n", length);
 464
 465         dd->dma_size = length;
 466
 467         if (!(dd->flags & FLAGS_FAST))
 468                 dma_sync_single_for_device(dd->dev, dma_addr_in, length,
 469                                            DMA_TO_DEVICE);
 470
 471         memset(&cfg, 0, sizeof(cfg));
 472
 473         cfg.src_addr = dd->phys_base + AES_REG_DATA_N(dd, 0);
 474         cfg.dst_addr = dd->phys_base + AES_REG_DATA_N(dd, 0);
 475         cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
 476         cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
 477         cfg.src_maxburst = DST_MAXBURST;
 478         cfg.dst_maxburst = DST_MAXBURST;
 479
 480         /* IN */
 481         ret = dmaengine_slave_config(dd->dma_lch_in, &cfg);
 482         if (ret) {
 483                 dev_err(dd->dev, "can't configure IN dmaengine slave: %d\n",
 484                         ret);
 485                 return ret;
 486         }
 487
 488         tx_in = dmaengine_prep_slave_sg(dd->dma_lch_in, in_sg, 1,
 489                                         DMA_MEM_TO_DEV,
 490                                         DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 491         if (!tx_in) {
 492                 dev_err(dd->dev, "IN prep_slave_sg() failed\n");
 493                 return -EINVAL;
 494         }
 495
 496         /* No callback necessary */
 497         tx_in->callback_param = dd;
 498
 499         /* OUT */
 500         ret = dmaengine_slave_config(dd->dma_lch_out, &cfg);
 501         if (ret) {
 502                 dev_err(dd->dev, "can't configure OUT dmaengine slave: %d\n",
 503                         ret);
 504                 return ret;
 505         }
 506
 507         tx_out = dmaengine_prep_slave_sg(dd->dma_lch_out, out_sg, 1,
 508                                         DMA_DEV_TO_MEM,
 509                                         DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 510         if (!tx_out) {
 511                 dev_err(dd->dev, "OUT prep_slave_sg() failed\n");
 512                 return -EINVAL;
 513         }
 514
 515         tx_out->callback = omap_aes_dma_out_callback;
 516         tx_out->callback_param = dd;
 517
 518         dmaengine_submit(tx_in);
 519         dmaengine_submit(tx_out);
 520
 521         dma_async_issue_pending(dd->dma_lch_in);
 522         dma_async_issue_pending(dd->dma_lch_out);
 523
 524         /* start DMA */
 525         dd->pdata->trigger(dd, length);
 526
 527         return 0;
 528 }
 529
 530 static int omap_aes_crypt_dma_start(struct omap_aes_dev *dd)
 531 {
 532         struct crypto_tfm *tfm = crypto_ablkcipher_tfm(
 533                                         crypto_ablkcipher_reqtfm(dd->req));
 534         int err, fast = 0, in, out;
 535         size_t count;
 536         dma_addr_t addr_in, addr_out;
 537         struct scatterlist *in_sg, *out_sg;
 538         int len32;
 539
 540         pr_debug("total: %d\n", dd->total);
 541
 542         if (sg_is_last(dd->in_sg) && sg_is_last(dd->out_sg)) {
 543                 /* check for alignment */
 544                 in = IS_ALIGNED((u32)dd->in_sg->offset, sizeof(u32));
 545                 out = IS_ALIGNED((u32)dd->out_sg->offset, sizeof(u32));
 546
 547                 fast = in && out;
 548         }
 549
 550         if (fast)  {
 551                 count = min(dd->total, sg_dma_len(dd->in_sg));
 552                 count = min(count, sg_dma_len(dd->out_sg));
 553
 554                 if (count != dd->total) {
 555                         pr_err("request length != buffer length\n");
 556                         return -EINVAL;
 557                 }
 558
 559                 pr_debug("fast\n");
 560
 561                 err = dma_map_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE);
 562                 if (!err) {
 563                         dev_err(dd->dev, "dma_map_sg() error\n");
 564                         return -EINVAL;
 565                 }
 566
 567                 err = dma_map_sg(dd->dev, dd->out_sg, 1, DMA_FROM_DEVICE);
 568                 if (!err) {
 569                         dev_err(dd->dev, "dma_map_sg() error\n");
 570                         dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE);
 571                         return -EINVAL;
 572                 }
 573
 574                 addr_in = sg_dma_address(dd->in_sg);
 575                 addr_out = sg_dma_address(dd->out_sg);
 576
 577                 in_sg = dd->in_sg;
 578                 out_sg = dd->out_sg;
 579
 580                 dd->flags |= FLAGS_FAST;
 581
 582         } else {
 583                 /* use cache buffers */
 584                 count = sg_copy(&dd->in_sg, &dd->in_offset, dd->buf_in,
 585                                  dd->buflen, dd->total, 0);
 586
 587                 len32 = DIV_ROUND_UP(count, DMA_MIN) * DMA_MIN;
 588
 589                 /*
 590                  * The data going into the AES module has been copied
 591                  * to a local buffer and the data coming out will go
 592                  * into a local buffer so set up local SG entries for
 593                  * both.
 594                  */
 595                 sg_init_table(&dd->in_sgl, 1);
 596                 dd->in_sgl.offset = dd->in_offset;
 597                 sg_dma_len(&dd->in_sgl) = len32;
 598                 sg_dma_address(&dd->in_sgl) = dd->dma_addr_in;
 599
 600                 sg_init_table(&dd->out_sgl, 1);
 601                 dd->out_sgl.offset = dd->out_offset;
 602                 sg_dma_len(&dd->out_sgl) = len32;
 603                 sg_dma_address(&dd->out_sgl) = dd->dma_addr_out;
 604
 605                 in_sg = &dd->in_sgl;
 606                 out_sg = &dd->out_sgl;
 607
 608                 addr_in = dd->dma_addr_in;
 609                 addr_out = dd->dma_addr_out;
 610
 611                 dd->flags &= ~FLAGS_FAST;
 612
 613         }
 614
 615         dd->total -= count;
 616
 617         err = omap_aes_crypt_dma(tfm, in_sg, out_sg);
 618         if (err) {
 619                 dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE);
 620                 dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_TO_DEVICE);
 621         }
 622
 623         return err;
 624 }
 625
 626 static void omap_aes_finish_req(struct omap_aes_dev *dd, int err)
 627 {
 628         struct ablkcipher_request *req = dd->req;
 629
 630         pr_debug("err: %d\n", err);
 631
 632         dd->flags &= ~FLAGS_BUSY;
 633
 634         req->base.complete(&req->base, err);
 635 }
 636
 637 static int omap_aes_crypt_dma_stop(struct omap_aes_dev *dd)
 638 {
 639         int err = 0;
 640         size_t count;
 641
 642         pr_debug("total: %d\n", dd->total);
 643
 644         omap_aes_dma_stop(dd);
 645
 646         dmaengine_terminate_all(dd->dma_lch_in);
 647         dmaengine_terminate_all(dd->dma_lch_out);
 648
 649         if (dd->flags & FLAGS_FAST) {
 650                 dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_FROM_DEVICE);
 651                 dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE);
 652         } else {
 653                 dma_sync_single_for_device(dd->dev, dd->dma_addr_out,
 654                                            dd->dma_size, DMA_FROM_DEVICE);
 655
 656                 /* copy data */
 657                 count = sg_copy(&dd->out_sg, &dd->out_offset, dd->buf_out,
 658                                  dd->buflen, dd->dma_size, 1);
 659                 if (count != dd->dma_size) {
 660                         err = -EINVAL;
 661                         pr_err("not all data converted: %u\n", count);
 662                 }
 663         }
 664
 665         return err;
 666 }
 667
 668 static int omap_aes_handle_queue(struct omap_aes_dev *dd,
 669                                struct ablkcipher_request *req)
 670 {
 671         struct crypto_async_request *async_req, *backlog;
 672         struct omap_aes_ctx *ctx;
 673         struct omap_aes_reqctx *rctx;
 674         unsigned long flags;
 675         int err, ret = 0;
 676
 677         spin_lock_irqsave(&dd->lock, flags);
 678         if (req)
 679                 ret = ablkcipher_enqueue_request(&dd->queue, req);
 680         if (dd->flags & FLAGS_BUSY) {
 681                 spin_unlock_irqrestore(&dd->lock, flags);
 682                 return ret;
 683         }
 684         backlog = crypto_get_backlog(&dd->queue);
 685         async_req = crypto_dequeue_request(&dd->queue);
 686         if (async_req)
 687                 dd->flags |= FLAGS_BUSY;
 688         spin_unlock_irqrestore(&dd->lock, flags);
 689
 690         if (!async_req)
 691                 return ret;
 692
 693         if (backlog)
 694                 backlog->complete(backlog, -EINPROGRESS);
 695
 696         req = ablkcipher_request_cast(async_req);
 697
 698         /* assign new request to device */
 699         dd->req = req;
 700         dd->total = req->nbytes;
 701         dd->in_offset = 0;
 702         dd->in_sg = req->src;
 703         dd->out_offset = 0;
 704         dd->out_sg = req->dst;
 705
 706         rctx = ablkcipher_request_ctx(req);
 707         ctx = crypto_ablkcipher_ctx(crypto_ablkcipher_reqtfm(req));
 708         rctx->mode &= FLAGS_MODE_MASK;
 709         dd->flags = (dd->flags & ~FLAGS_MODE_MASK) | rctx->mode;
 710
 711         dd->ctx = ctx;
 712         ctx->dd = dd;
 713
 714         err = omap_aes_write_ctrl(dd);
 715         if (!err)
 716                 err = omap_aes_crypt_dma_start(dd);
 717         if (err) {
 718                 /* aes_task will not finish it, so do it here */
 719                 omap_aes_finish_req(dd, err);
 720                 tasklet_schedule(&dd->queue_task);
 721         }
 722
 723         return ret; /* return ret, which is enqueue return value */
 724 }
 725
 726 static void omap_aes_done_task(unsigned long data)
 727 {
 728         struct omap_aes_dev *dd = (struct omap_aes_dev *)data;
 729         int err;
 730
 731         pr_debug("enter\n");
 732
 733         err = omap_aes_crypt_dma_stop(dd);
 734
 735         err = dd->err ? : err;
 736
 737         if (dd->total && !err) {
 738                 err = omap_aes_crypt_dma_start(dd);
 739                 if (!err)
 740                         return; /* DMA started. Not fininishing. */
 741         }
 742
 743         omap_aes_finish_req(dd, err);
 744         omap_aes_handle_queue(dd, NULL);
 745
 746         pr_debug("exit\n");
 747 }
 748
 749 static void omap_aes_queue_task(unsigned long data)
 750 {
 751         struct omap_aes_dev *dd = (struct omap_aes_dev *)data;
 752
 753         omap_aes_handle_queue(dd, NULL);
 754 }
 755
 756 static int omap_aes_crypt(struct ablkcipher_request *req, unsigned long mode)
 757 {
 758         struct omap_aes_ctx *ctx = crypto_ablkcipher_ctx(
 759                         crypto_ablkcipher_reqtfm(req));
 760         struct omap_aes_reqctx *rctx = ablkcipher_request_ctx(req);
 761         struct omap_aes_dev *dd;
 762
 763         pr_debug("nbytes: %d, enc: %d, cbc: %d\n", req->nbytes,
 764                   !!(mode & FLAGS_ENCRYPT),
 765                   !!(mode & FLAGS_CBC));
 766
 767         if (!IS_ALIGNED(req->nbytes, AES_BLOCK_SIZE)) {
 768                 pr_err("request size is not exact amount of AES blocks\n");
 769                 return -EINVAL;
 770         }
 771
 772         dd = omap_aes_find_dev(ctx);
 773         if (!dd)
 774                 return -ENODEV;
 775
 776         rctx->mode = mode;
 777
 778         return omap_aes_handle_queue(dd, req);
 779 }
 780
 781 /* ********************** ALG API ************************************ */
 782
 783 static int omap_aes_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
 784                            unsigned int keylen)
 785 {
 786         struct omap_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm);
 787
 788         if (keylen != AES_KEYSIZE_128 && keylen != AES_KEYSIZE_192 &&
 789                    keylen != AES_KEYSIZE_256)
 790                 return -EINVAL;
 791
 792         pr_debug("enter, keylen: %d\n", keylen);
 793
 794         memcpy(ctx->key, key, keylen);
 795         ctx->keylen = keylen;
 796
 797         return 0;
 798 }
 799
 800 static int omap_aes_ecb_encrypt(struct ablkcipher_request *req)
 801 {
 802         return omap_aes_crypt(req, FLAGS_ENCRYPT);
 803 }
 804
 805 static int omap_aes_ecb_decrypt(struct ablkcipher_request *req)
 806 {
 807         return omap_aes_crypt(req, 0);
 808 }
 809
 810 static int omap_aes_cbc_encrypt(struct ablkcipher_request *req)
 811 {
 812         return omap_aes_crypt(req, FLAGS_ENCRYPT | FLAGS_CBC);
 813 }
 814
 815 static int omap_aes_cbc_decrypt(struct ablkcipher_request *req)
 816 {
 817         return omap_aes_crypt(req, FLAGS_CBC);
 818 }
 819
 820 static int omap_aes_ctr_encrypt(struct ablkcipher_request *req)
 821 {
 822         return omap_aes_crypt(req, FLAGS_ENCRYPT | FLAGS_CTR);
 823 }
 824
 825 static int omap_aes_ctr_decrypt(struct ablkcipher_request *req)
 826 {
 827         return omap_aes_crypt(req, FLAGS_CTR);
 828 }
 829
 830 static int omap_aes_cra_init(struct crypto_tfm *tfm)
 831 {
 832         struct omap_aes_dev *dd = NULL;
 833
 834         /* Find AES device, currently picks the first device */
 835         spin_lock_bh(&list_lock);
 836         list_for_each_entry(dd, &dev_list, list) {
 837                 break;
 838         }
 839         spin_unlock_bh(&list_lock);
 840
 841         pm_runtime_get_sync(dd->dev);
 842         tfm->crt_ablkcipher.reqsize = sizeof(struct omap_aes_reqctx);
 843
 844         return 0;
 845 }
 846
 847 static void omap_aes_cra_exit(struct crypto_tfm *tfm)
 848 {
 849         struct omap_aes_dev *dd = NULL;
 850
 851         /* Find AES device, currently picks the first device */
 852         spin_lock_bh(&list_lock);
 853         list_for_each_entry(dd, &dev_list, list) {
 854                 break;
 855         }
 856         spin_unlock_bh(&list_lock);
 857
 858         pm_runtime_put_sync(dd->dev);
 859 }
 860
 861 /* ********************** ALGS ************************************ */
 862
 863 static struct crypto_alg algs_ecb_cbc[] = {
 864 {
 865         .cra_name               = "ecb(aes)",
 866         .cra_driver_name        = "ecb-aes-omap",
 867         .cra_priority           = 100,
 868         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER |
 869                                   CRYPTO_ALG_KERN_DRIVER_ONLY |
 870                                   CRYPTO_ALG_ASYNC,
 871         .cra_blocksize          = AES_BLOCK_SIZE,
 872         .cra_ctxsize            = sizeof(struct omap_aes_ctx),
 873         .cra_alignmask          = 0,
 874         .cra_type               = &crypto_ablkcipher_type,
 875         .cra_module             = THIS_MODULE,
 876         .cra_init               = omap_aes_cra_init,
 877         .cra_exit               = omap_aes_cra_exit,
 878         .cra_u.ablkcipher = {
 879                 .min_keysize    = AES_MIN_KEY_SIZE,
 880                 .max_keysize    = AES_MAX_KEY_SIZE,
 881                 .setkey         = omap_aes_setkey,
 882                 .encrypt        = omap_aes_ecb_encrypt,
 883                 .decrypt        = omap_aes_ecb_decrypt,
 884         }
 885 },
 886 {
 887         .cra_name               = "cbc(aes)",
 888         .cra_driver_name        = "cbc-aes-omap",
 889         .cra_priority           = 100,
 890         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER |
 891                                   CRYPTO_ALG_KERN_DRIVER_ONLY |
 892                                   CRYPTO_ALG_ASYNC,
 893         .cra_blocksize          = AES_BLOCK_SIZE,
 894         .cra_ctxsize            = sizeof(struct omap_aes_ctx),
 895         .cra_alignmask          = 0,
 896         .cra_type               = &crypto_ablkcipher_type,
 897         .cra_module             = THIS_MODULE,
 898         .cra_init               = omap_aes_cra_init,
 899         .cra_exit               = omap_aes_cra_exit,
 900         .cra_u.ablkcipher = {
 901                 .min_keysize    = AES_MIN_KEY_SIZE,
 902                 .max_keysize    = AES_MAX_KEY_SIZE,
 903                 .ivsize         = AES_BLOCK_SIZE,
 904                 .setkey         = omap_aes_setkey,
 905                 .encrypt        = omap_aes_cbc_encrypt,
 906                 .decrypt        = omap_aes_cbc_decrypt,
 907         }
 908 }
 909 };
 910
 911 static struct crypto_alg algs_ctr[] = {
 912 {
 913         .cra_name               = "ctr(aes)",
 914         .cra_driver_name        = "ctr-aes-omap",
 915         .cra_priority           = 100,
 916         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER |
 917                                   CRYPTO_ALG_KERN_DRIVER_ONLY |
 918                                   CRYPTO_ALG_ASYNC,
 919         .cra_blocksize          = AES_BLOCK_SIZE,
 920         .cra_ctxsize            = sizeof(struct omap_aes_ctx),
 921         .cra_alignmask          = 0,
 922         .cra_type               = &crypto_ablkcipher_type,
 923         .cra_module             = THIS_MODULE,
 924         .cra_init               = omap_aes_cra_init,
 925         .cra_exit               = omap_aes_cra_exit,
 926         .cra_u.ablkcipher = {
 927                 .min_keysize    = AES_MIN_KEY_SIZE,
 928                 .max_keysize    = AES_MAX_KEY_SIZE,
 929                 .geniv          = "eseqiv",
 930                 .ivsize         = AES_BLOCK_SIZE,
 931                 .setkey         = omap_aes_setkey,
 932                 .encrypt        = omap_aes_ctr_encrypt,
 933                 .decrypt        = omap_aes_ctr_decrypt,
 934         }
 935 } ,
 936 };
 937
 938 static struct omap_aes_algs_info omap_aes_algs_info_ecb_cbc[] = {
 939         {
 940                 .algs_list      = algs_ecb_cbc,
 941                 .size           = ARRAY_SIZE(algs_ecb_cbc),
 942         },
 943 };
 944
 945 static const struct omap_aes_pdata omap_aes_pdata_omap2 = {
 946         .algs_info      = omap_aes_algs_info_ecb_cbc,
 947         .algs_info_size = ARRAY_SIZE(omap_aes_algs_info_ecb_cbc),
 948         .trigger        = omap_aes_dma_trigger_omap2,
 949         .key_ofs        = 0x1c,
 950         .iv_ofs         = 0x20,
 951         .ctrl_ofs       = 0x30,
 952         .data_ofs       = 0x34,
 953         .rev_ofs        = 0x44,
 954         .mask_ofs       = 0x48,
 955         .dma_enable_in  = BIT(2),
 956         .dma_enable_out = BIT(3),
 957         .dma_start      = BIT(5),
 958         .major_mask     = 0xf0,
 959         .major_shift    = 4,
 960         .minor_mask     = 0x0f,
 961         .minor_shift    = 0,
 962 };
 963
 964 #ifdef CONFIG_OF
 965 static struct omap_aes_algs_info omap_aes_algs_info_ecb_cbc_ctr[] = {
 966         {
 967                 .algs_list      = algs_ecb_cbc,
 968                 .size           = ARRAY_SIZE(algs_ecb_cbc),
 969         },
 970         {
 971                 .algs_list      = algs_ctr,
 972                 .size           = ARRAY_SIZE(algs_ctr),
 973         },
 974 };
 975
 976 static const struct omap_aes_pdata omap_aes_pdata_omap3 = {
 977         .algs_info      = omap_aes_algs_info_ecb_cbc_ctr,
 978         .algs_info_size = ARRAY_SIZE(omap_aes_algs_info_ecb_cbc_ctr),
 979         .trigger        = omap_aes_dma_trigger_omap2,
 980         .key_ofs        = 0x1c,
 981         .iv_ofs         = 0x20,
 982         .ctrl_ofs       = 0x30,
 983         .data_ofs       = 0x34,
 984         .rev_ofs        = 0x44,
 985         .mask_ofs       = 0x48,
 986         .dma_enable_in  = BIT(2),
 987         .dma_enable_out = BIT(3),
 988         .dma_start      = BIT(5),
 989         .major_mask     = 0xf0,
 990         .major_shift    = 4,
 991         .minor_mask     = 0x0f,
 992         .minor_shift    = 0,
 993 };
 994
 995 static const struct omap_aes_pdata omap_aes_pdata_omap4 = {
 996         .algs_info      = omap_aes_algs_info_ecb_cbc_ctr,
 997         .algs_info_size = ARRAY_SIZE(omap_aes_algs_info_ecb_cbc_ctr),
 998         .trigger        = omap_aes_dma_trigger_omap4,
 999         .key_ofs        = 0x3c,
1000         .iv_ofs         = 0x40,
1001         .ctrl_ofs       = 0x50,
1002         .data_ofs       = 0x60,
1003         .rev_ofs        = 0x80,
1004         .mask_ofs       = 0x84,
1005         .dma_enable_in  = BIT(5),
1006         .dma_enable_out = BIT(6),
1007         .major_mask     = 0x0700,
1008         .major_shift    = 8,
1009         .minor_mask     = 0x003f,
1010         .minor_shift    = 0,
1011 };
1012
1013 static const struct of_device_id omap_aes_of_match[] = {
1014         {
1015                 .compatible     = "ti,omap2-aes",
1016                 .data           = &omap_aes_pdata_omap2,
1017         },
1018         {
1019                 .compatible     = "ti,omap3-aes",
1020                 .data           = &omap_aes_pdata_omap3,
1021         },
1022         {
1023                 .compatible     = "ti,omap4-aes",
1024                 .data           = &omap_aes_pdata_omap4,
1025         },
1026         {},
1027 };
1028 MODULE_DEVICE_TABLE(of, omap_aes_of_match);
1029
1030 static int omap_aes_get_res_of(struct omap_aes_dev *dd,
1031                 struct device *dev, struct resource *res)
1032 {
1033         struct device_node *node = dev->of_node;
1034         const struct of_device_id *match;
1035         int err = 0;
1036
1037         match = of_match_device(of_match_ptr(omap_aes_of_match), dev);
1038         if (!match) {
1039                 dev_err(dev, "no compatible OF match\n");
1040                 err = -EINVAL;
1041                 goto err;
1042         }
1043
1044         err = of_address_to_resource(node, 0, res);
1045         if (err < 0) {
1046                 dev_err(dev, "can't translate OF node address\n");
1047                 err = -EINVAL;
1048                 goto err;
1049         }
1050
1051         dd->dma_out = -1; /* Dummy value that's unused */
1052         dd->dma_in = -1; /* Dummy value that's unused */
1053
1054         dd->pdata = match->data;
1055
1056 err:
1057         return err;
1058 }
1059 #else
1060 static const struct of_device_id omap_aes_of_match[] = {
1061         {},
1062 };
1063
1064 static int omap_aes_get_res_of(struct omap_aes_dev *dd,
1065                 struct device *dev, struct resource *res)
1066 {
1067         return -EINVAL;
1068 }
1069 #endif
1070
1071 static int omap_aes_get_res_pdev(struct omap_aes_dev *dd,
1072                 struct platform_device *pdev, struct resource *res)
1073 {
1074         struct device *dev = &pdev->dev;
1075         struct resource *r;
1076         int err = 0;
1077
1078         /* Get the base address */
1079         r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1080         if (!r) {
1081                 dev_err(dev, "no MEM resource info\n");
1082                 err = -ENODEV;
1083                 goto err;
1084         }
1085         memcpy(res, r, sizeof(*res));
1086
1087         /* Get the DMA out channel */
1088         r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
1089         if (!r) {
1090                 dev_err(dev, "no DMA out resource info\n");
1091                 err = -ENODEV;
1092                 goto err;
1093         }
1094         dd->dma_out = r->start;
1095
1096         /* Get the DMA in channel */
1097         r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
1098         if (!r) {
1099                 dev_err(dev, "no DMA in resource info\n");
1100                 err = -ENODEV;
1101                 goto err;
1102         }
1103         dd->dma_in = r->start;
1104
1105         /* Only OMAP2/3 can be non-DT */
1106         dd->pdata = &omap_aes_pdata_omap2;
1107
1108 err:
1109         return err;
1110 }
1111
1112 static int omap_aes_probe(struct platform_device *pdev)
1113 {
1114         struct device *dev = &pdev->dev;
1115         struct omap_aes_dev *dd;
1116         struct crypto_alg *algp;
1117         struct resource res;
1118         int err = -ENOMEM, i, j;
1119         u32 reg;
1120
1121         dd = kzalloc(sizeof(struct omap_aes_dev), GFP_KERNEL);
1122         if (dd == NULL) {
1123                 dev_err(dev, "unable to alloc data struct.\n");
1124                 goto err_data;
1125         }
1126         dd->dev = dev;
1127         platform_set_drvdata(pdev, dd);
1128
1129         spin_lock_init(&dd->lock);
1130         crypto_init_queue(&dd->queue, OMAP_AES_QUEUE_LENGTH);
1131
1132         err = (dev->of_node) ? omap_aes_get_res_of(dd, dev, &res) :
1133                                omap_aes_get_res_pdev(dd, pdev, &res);
1134         if (err)
1135                 goto err_res;
1136
1137         dd->io_base = devm_ioremap_resource(dev, &res);
1138         if (IS_ERR(dd->io_base)) {
1139                 err = PTR_ERR(dd->io_base);
1140                 goto err_res;
1141         }
1142         dd->phys_base = res.start;
1143
1144         pm_runtime_enable(dev);
1145         pm_runtime_get_sync(dev);
1146
1147         omap_aes_dma_stop(dd);
1148
1149         reg = omap_aes_read(dd, AES_REG_REV(dd));
1150
1151         pm_runtime_put_sync(dev);
1152
1153         dev_info(dev, "OMAP AES hw accel rev: %u.%u\n",
1154                  (reg & dd->pdata->major_mask) >> dd->pdata->major_shift,
1155                  (reg & dd->pdata->minor_mask) >> dd->pdata->minor_shift);
1156
1157         tasklet_init(&dd->done_task, omap_aes_done_task, (unsigned long)dd);
1158         tasklet_init(&dd->queue_task, omap_aes_queue_task, (unsigned long)dd);
1159
1160         err = omap_aes_dma_init(dd);
1161         if (err)
1162                 goto err_dma;
1163
1164         INIT_LIST_HEAD(&dd->list);
1165         spin_lock(&list_lock);
1166         list_add_tail(&dd->list, &dev_list);
1167         spin_unlock(&list_lock);
1168
1169         for (i = 0; i < dd->pdata->algs_info_size; i++) {
1170                 for (j = 0; j < dd->pdata->algs_info[i].size; j++) {
1171                         algp = &dd->pdata->algs_info[i].algs_list[j];
1172
1173                         pr_debug("reg alg: %s\n", algp->cra_name);
1174                         INIT_LIST_HEAD(&algp->cra_list);
1175
1176                         err = crypto_register_alg(algp);
1177                         if (err)
1178                                 goto err_algs;
1179
1180                         dd->pdata->algs_info[i].registered++;
1181                 }
1182         }
1183
1184         return 0;
1185 err_algs:
1186         for (i = dd->pdata->algs_info_size - 1; i >= 0; i--)
1187                 for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--)
1188                         crypto_unregister_alg(
1189                                         &dd->pdata->algs_info[i].algs_list[j]);
1190         omap_aes_dma_cleanup(dd);
1191 err_dma:
1192         tasklet_kill(&dd->done_task);
1193         tasklet_kill(&dd->queue_task);
1194         pm_runtime_disable(dev);
1195 err_res:
1196         kfree(dd);
1197         dd = NULL;
1198 err_data:
1199         dev_err(dev, "initialization failed.\n");
1200         return err;
1201 }
1202
1203 static int omap_aes_remove(struct platform_device *pdev)
1204 {
1205         struct omap_aes_dev *dd = platform_get_drvdata(pdev);
1206         int i, j;
1207
1208         if (!dd)
1209                 return -ENODEV;
1210
1211         spin_lock(&list_lock);
1212         list_del(&dd->list);
1213         spin_unlock(&list_lock);
1214
1215         for (i = dd->pdata->algs_info_size - 1; i >= 0; i--)
1216                 for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--)
1217                         crypto_unregister_alg(
1218                                         &dd->pdata->algs_info[i].algs_list[j]);
1219
1220         tasklet_kill(&dd->done_task);
1221         tasklet_kill(&dd->queue_task);
1222         omap_aes_dma_cleanup(dd);
1223         pm_runtime_disable(dd->dev);
1224         kfree(dd);
1225         dd = NULL;
1226
1227         return 0;
1228 }
1229
1230 #ifdef CONFIG_PM_SLEEP
1231 static int omap_aes_suspend(struct device *dev)
1232 {
1233         pm_runtime_put_sync(dev);
1234         return 0;
1235 }
1236
1237 static int omap_aes_resume(struct device *dev)
1238 {
1239         pm_runtime_get_sync(dev);
1240         return 0;
1241 }
1242 #endif
1243
1244 static const struct dev_pm_ops omap_aes_pm_ops = {
1245         SET_SYSTEM_SLEEP_PM_OPS(omap_aes_suspend, omap_aes_resume)
1246 };
1247
1248 static struct platform_driver omap_aes_driver = {
1249         .probe  = omap_aes_probe,
1250         .remove = omap_aes_remove,
1251         .driver = {
1252                 .name   = "omap-aes",
1253                 .owner  = THIS_MODULE,
1254                 .pm     = &omap_aes_pm_ops,
1255                 .of_match_table = omap_aes_of_match,
1256         },
1257 };
1258
1259 module_platform_driver(omap_aes_driver);
1260
1261 MODULE_DESCRIPTION("OMAP AES hw acceleration support.");
1262 MODULE_LICENSE("GPL v2");
1263 MODULE_AUTHOR("Dmitry Kasatkin");
1264