drivers/media/platform/mxc/capture/ipu_prp_enc.c

   1 /*
   2  * Copyright 2004-2013 Freescale Semiconductor, Inc. All Rights Reserved.
   3  */
   4
   5 /*
   6  * The code contained herein is licensed under the GNU General Public
   7  * License. You may obtain a copy of the GNU General Public License
   8  * Version 2 or later at the following locations:
   9  *
  10  * http://www.opensource.org/licenses/gpl-license.html
  11  * http://www.gnu.org/copyleft/gpl.html
  12  */
  13
  14 /*!
  15  * @file ipu_prp_enc.c
  16  *
  17  * @brief IPU Use case for PRP-ENC
  18  *
  19  * @ingroup IPU
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/dma-mapping.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/ipu.h>
  26 #include <linux/mipi_csi2.h>
  27 #include "mxc_v4l2_capture.h"
  28 #include "ipu_prp_sw.h"
  29
  30 #ifdef CAMERA_DBG
  31         #define CAMERA_TRACE(x) (printk)x
  32 #else
  33         #define CAMERA_TRACE(x)
  34 #endif
  35
  36 static ipu_rotate_mode_t grotation = IPU_ROTATE_NONE;
  37
  38 /*
  39  * Function definitions
  40  */
  41
  42 /*!
  43  * IPU ENC callback function.
  44  *
  45  * @param irq       int irq line
  46  * @param dev_id    void * device id
  47  *
  48  * @return status   IRQ_HANDLED for handled
  49  */
  50 static irqreturn_t prp_enc_callback(int irq, void *dev_id)
  51 {
  52         cam_data *cam = (cam_data *) dev_id;
  53
  54         if (cam->enc_callback == NULL)
  55                 return IRQ_HANDLED;
  56
  57         cam->enc_callback(irq, dev_id);
  58
  59         return IRQ_HANDLED;
  60 }
  61
  62 /*!
  63  * PrpENC enable channel setup function
  64  *
  65  * @param cam       struct cam_data * mxc capture instance
  66  *
  67  * @return  status
  68  */
  69 static int prp_enc_setup(cam_data *cam)
  70 {
  71         ipu_channel_params_t enc;
  72         int err = 0;
  73         dma_addr_t dummy = cam->dummy_frame.buffer.m.offset;
  74 #ifdef CONFIG_MXC_MIPI_CSI2
  75         void *mipi_csi2_info;
  76         int ipu_id;
  77         int csi_id;
  78 #endif
  79
  80         CAMERA_TRACE("In prp_enc_setup\n");
  81         if (!cam) {
  82                 printk(KERN_ERR "cam private is NULL\n");
  83                 return -ENXIO;
  84         }
  85         memset(&enc, 0, sizeof(ipu_channel_params_t));
  86
  87         ipu_csi_get_window_size(cam->ipu, &enc.csi_prp_enc_mem.in_width,
  88                                 &enc.csi_prp_enc_mem.in_height, cam->csi);
  89
  90         enc.csi_prp_enc_mem.in_pixel_fmt = IPU_PIX_FMT_UYVY;
  91         enc.csi_prp_enc_mem.out_width = cam->v2f.fmt.pix.width;
  92         enc.csi_prp_enc_mem.out_height = cam->v2f.fmt.pix.height;
  93         enc.csi_prp_enc_mem.csi = cam->csi;
  94         if (cam->rotation >= IPU_ROTATE_90_RIGHT) {
  95                 enc.csi_prp_enc_mem.out_width = cam->v2f.fmt.pix.height;
  96                 enc.csi_prp_enc_mem.out_height = cam->v2f.fmt.pix.width;
  97         }
  98
  99         if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420) {
 100                 enc.csi_prp_enc_mem.out_pixel_fmt = IPU_PIX_FMT_YUV420P;
 101                 pr_info("YUV420\n");
 102         } else if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_YVU420) {
 103                 enc.csi_prp_enc_mem.out_pixel_fmt = IPU_PIX_FMT_YVU420P;
 104                 pr_info("YVU420\n");
 105         } else if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_YUV422P) {
 106                 enc.csi_prp_enc_mem.out_pixel_fmt = IPU_PIX_FMT_YUV422P;
 107                 pr_info("YUV422P\n");
 108         } else if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_YUYV) {
 109                 enc.csi_prp_enc_mem.out_pixel_fmt = IPU_PIX_FMT_YUYV;
 110                 pr_info("YUYV\n");
 111         } else if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_UYVY) {
 112                 enc.csi_prp_enc_mem.out_pixel_fmt = IPU_PIX_FMT_UYVY;
 113                 pr_info("UYVY\n");
 114         } else if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_NV12) {
 115                 enc.csi_prp_enc_mem.out_pixel_fmt = IPU_PIX_FMT_NV12;
 116                 pr_info("NV12\n");
 117         } else if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_BGR24) {
 118                 enc.csi_prp_enc_mem.out_pixel_fmt = IPU_PIX_FMT_BGR24;
 119                 pr_info("BGR24\n");
 120         } else if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_RGB24) {
 121                 enc.csi_prp_enc_mem.out_pixel_fmt = IPU_PIX_FMT_RGB24;
 122                 pr_info("RGB24\n");
 123         } else if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_RGB565) {
 124                 enc.csi_prp_enc_mem.out_pixel_fmt = IPU_PIX_FMT_RGB565;
 125                 pr_info("RGB565\n");
 126         } else if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_BGR32) {
 127                 enc.csi_prp_enc_mem.out_pixel_fmt = IPU_PIX_FMT_BGR32;
 128                 pr_info("BGR32\n");
 129         } else if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_RGB32) {
 130                 enc.csi_prp_enc_mem.out_pixel_fmt = IPU_PIX_FMT_RGB32;
 131                 pr_info("RGB32\n");
 132         } else {
 133                 printk(KERN_ERR "format not supported\n");
 134                 return -EINVAL;
 135         }
 136
 137 #ifdef CONFIG_MXC_MIPI_CSI2
 138         mipi_csi2_info = mipi_csi2_get_info();
 139
 140         if (mipi_csi2_info) {
 141                 if (mipi_csi2_get_status(mipi_csi2_info)) {
 142                         ipu_id = mipi_csi2_get_bind_ipu(mipi_csi2_info);
 143                         csi_id = mipi_csi2_get_bind_csi(mipi_csi2_info);
 144
 145                         if (cam->ipu == ipu_get_soc(ipu_id)
 146                                 && cam->csi == csi_id) {
 147                                 enc.csi_prp_enc_mem.mipi_en = true;
 148                                 enc.csi_prp_enc_mem.mipi_vc =
 149                                 mipi_csi2_get_virtual_channel(mipi_csi2_info);
 150                                 enc.csi_prp_enc_mem.mipi_id =
 151                                 mipi_csi2_get_datatype(mipi_csi2_info);
 152
 153                                 mipi_csi2_pixelclk_enable(mipi_csi2_info);
 154                         } else {
 155                                 enc.csi_prp_enc_mem.mipi_en = false;
 156                                 enc.csi_prp_enc_mem.mipi_vc = 0;
 157                                 enc.csi_prp_enc_mem.mipi_id = 0;
 158                         }
 159                 } else {
 160                         enc.csi_prp_enc_mem.mipi_en = false;
 161                         enc.csi_prp_enc_mem.mipi_vc = 0;
 162                         enc.csi_prp_enc_mem.mipi_id = 0;
 163                 }
 164         } else {
 165                 printk(KERN_ERR "%s() in %s: Fail to get mipi_csi2_info!\n",
 166                        __func__, __FILE__);
 167                 return -EPERM;
 168         }
 169 #endif
 170
 171         err = ipu_init_channel(cam->ipu, CSI_PRP_ENC_MEM, &enc);
 172         if (err != 0) {
 173                 printk(KERN_ERR "ipu_init_channel %d\n", err);
 174                 return err;
 175         }
 176
 177         grotation = cam->rotation;
 178         if (cam->rotation >= IPU_ROTATE_90_RIGHT) {
 179                 if (cam->rot_enc_bufs_vaddr[0]) {
 180                         dma_free_coherent(0, cam->rot_enc_buf_size[0],
 181                                           cam->rot_enc_bufs_vaddr[0],
 182                                           cam->rot_enc_bufs[0]);
 183                 }
 184                 if (cam->rot_enc_bufs_vaddr[1]) {
 185                         dma_free_coherent(0, cam->rot_enc_buf_size[1],
 186                                           cam->rot_enc_bufs_vaddr[1],
 187                                           cam->rot_enc_bufs[1]);
 188                 }
 189                 cam->rot_enc_buf_size[0] =
 190                     PAGE_ALIGN(cam->v2f.fmt.pix.sizeimage);
 191                 cam->rot_enc_bufs_vaddr[0] =
 192                     (void *)dma_alloc_coherent(0, cam->rot_enc_buf_size[0],
 193                                                &cam->rot_enc_bufs[0],
 194                                                GFP_DMA | GFP_KERNEL);
 195                 if (!cam->rot_enc_bufs_vaddr[0]) {
 196                         printk(KERN_ERR "alloc enc_bufs0\n");
 197                         return -ENOMEM;
 198                 }
 199                 cam->rot_enc_buf_size[1] =
 200                     PAGE_ALIGN(cam->v2f.fmt.pix.sizeimage);
 201                 cam->rot_enc_bufs_vaddr[1] =
 202                     (void *)dma_alloc_coherent(0, cam->rot_enc_buf_size[1],
 203                                                &cam->rot_enc_bufs[1],
 204                                                GFP_DMA | GFP_KERNEL);
 205                 if (!cam->rot_enc_bufs_vaddr[1]) {
 206                         dma_free_coherent(0, cam->rot_enc_buf_size[0],
 207                                           cam->rot_enc_bufs_vaddr[0],
 208                                           cam->rot_enc_bufs[0]);
 209                         cam->rot_enc_bufs_vaddr[0] = NULL;
 210                         cam->rot_enc_bufs[0] = 0;
 211                         printk(KERN_ERR "alloc enc_bufs1\n");
 212                         return -ENOMEM;
 213                 }
 214
 215                 err = ipu_init_channel_buffer(cam->ipu, CSI_PRP_ENC_MEM,
 216                                               IPU_OUTPUT_BUFFER,
 217                                               enc.csi_prp_enc_mem.out_pixel_fmt,
 218                                               enc.csi_prp_enc_mem.out_width,
 219                                               enc.csi_prp_enc_mem.out_height,
 220                                               enc.csi_prp_enc_mem.out_width,
 221                                               IPU_ROTATE_NONE,
 222                                               cam->rot_enc_bufs[0],
 223                                               cam->rot_enc_bufs[1], 0, 0, 0);
 224                 if (err != 0) {
 225                         printk(KERN_ERR "CSI_PRP_ENC_MEM err\n");
 226                         return err;
 227                 }
 228
 229                 err = ipu_init_channel(cam->ipu, MEM_ROT_ENC_MEM, NULL);
 230                 if (err != 0) {
 231                         printk(KERN_ERR "MEM_ROT_ENC_MEM channel err\n");
 232                         return err;
 233                 }
 234
 235                 err = ipu_init_channel_buffer(cam->ipu, MEM_ROT_ENC_MEM,
 236                                               IPU_INPUT_BUFFER,
 237                                               enc.csi_prp_enc_mem.out_pixel_fmt,
 238                                               enc.csi_prp_enc_mem.out_width,
 239                                               enc.csi_prp_enc_mem.out_height,
 240                                               enc.csi_prp_enc_mem.out_width,
 241                                               cam->rotation,
 242                                               cam->rot_enc_bufs[0],
 243                                               cam->rot_enc_bufs[1], 0, 0, 0);
 244                 if (err != 0) {
 245                         printk(KERN_ERR "MEM_ROT_ENC_MEM input buffer\n");
 246                         return err;
 247                 }
 248
 249                 err =
 250                     ipu_init_channel_buffer(cam->ipu, MEM_ROT_ENC_MEM,
 251                                             IPU_OUTPUT_BUFFER,
 252                                             enc.csi_prp_enc_mem.out_pixel_fmt,
 253                                             enc.csi_prp_enc_mem.out_height,
 254                                             enc.csi_prp_enc_mem.out_width,
 255                                             cam->v2f.fmt.pix.bytesperline /
 256                                             bytes_per_pixel(enc.csi_prp_enc_mem.
 257                                                             out_pixel_fmt),
 258                                             IPU_ROTATE_NONE,
 259                                             dummy, dummy, 0,
 260                                             cam->offset.u_offset,
 261                                             cam->offset.v_offset);
 262                 if (err != 0) {
 263                         printk(KERN_ERR "MEM_ROT_ENC_MEM output buffer\n");
 264                         return err;
 265                 }
 266
 267                 err = ipu_link_channels(cam->ipu,
 268                                         CSI_PRP_ENC_MEM, MEM_ROT_ENC_MEM);
 269                 if (err < 0) {
 270                         printk(KERN_ERR
 271                                "link CSI_PRP_ENC_MEM-MEM_ROT_ENC_MEM\n");
 272                         return err;
 273                 }
 274
 275                 err = ipu_enable_channel(cam->ipu, CSI_PRP_ENC_MEM);
 276                 if (err < 0) {
 277                         printk(KERN_ERR "ipu_enable_channel CSI_PRP_ENC_MEM\n");
 278                         return err;
 279                 }
 280                 err = ipu_enable_channel(cam->ipu, MEM_ROT_ENC_MEM);
 281                 if (err < 0) {
 282                         printk(KERN_ERR "ipu_enable_channel MEM_ROT_ENC_MEM\n");
 283                         return err;
 284                 }
 285
 286                 ipu_select_buffer(cam->ipu, CSI_PRP_ENC_MEM,
 287                                   IPU_OUTPUT_BUFFER, 0);
 288                 ipu_select_buffer(cam->ipu, CSI_PRP_ENC_MEM,
 289                                   IPU_OUTPUT_BUFFER, 1);
 290         } else {
 291                 err =
 292                     ipu_init_channel_buffer(cam->ipu, CSI_PRP_ENC_MEM,
 293                                             IPU_OUTPUT_BUFFER,
 294                                             enc.csi_prp_enc_mem.out_pixel_fmt,
 295                                             enc.csi_prp_enc_mem.out_width,
 296                                             enc.csi_prp_enc_mem.out_height,
 297                                             cam->v2f.fmt.pix.bytesperline /
 298                                             bytes_per_pixel(enc.csi_prp_enc_mem.
 299                                                             out_pixel_fmt),
 300                                             cam->rotation,
 301                                             dummy, dummy, 0,
 302                                             cam->offset.u_offset,
 303                                             cam->offset.v_offset);
 304                 if (err != 0) {
 305                         printk(KERN_ERR "CSI_PRP_ENC_MEM output buffer\n");
 306                         return err;
 307                 }
 308                 err = ipu_enable_channel(cam->ipu, CSI_PRP_ENC_MEM);
 309                 if (err < 0) {
 310                         printk(KERN_ERR "ipu_enable_channel CSI_PRP_ENC_MEM\n");
 311                         return err;
 312                 }
 313         }
 314
 315         return err;
 316 }
 317
 318 /*!
 319  * function to update physical buffer address for encorder IDMA channel
 320  *
 321  * @param eba         physical buffer address for encorder IDMA channel
 322  * @param buffer_num  int buffer 0 or buffer 1
 323  *
 324  * @return  status
 325  */
 326 static int prp_enc_eba_update(struct ipu_soc *ipu, dma_addr_t eba,
 327                               int *buffer_num)
 328 {
 329         int err = 0;
 330
 331         pr_debug("eba %x\n", eba);
 332         if (grotation >= IPU_ROTATE_90_RIGHT) {
 333                 err = ipu_update_channel_buffer(ipu, MEM_ROT_ENC_MEM,
 334                                                 IPU_OUTPUT_BUFFER, *buffer_num,
 335                                                 eba);
 336         } else {
 337                 err = ipu_update_channel_buffer(ipu, CSI_PRP_ENC_MEM,
 338                                                 IPU_OUTPUT_BUFFER, *buffer_num,
 339                                                 eba);
 340         }
 341         if (err != 0) {
 342                 if (grotation >= IPU_ROTATE_90_RIGHT) {
 343                         ipu_clear_buffer_ready(ipu, MEM_ROT_ENC_MEM,
 344                                                IPU_OUTPUT_BUFFER,
 345                                                *buffer_num);
 346                         err = ipu_update_channel_buffer(ipu, MEM_ROT_ENC_MEM,
 347                                                         IPU_OUTPUT_BUFFER,
 348                                                         *buffer_num,
 349                                                         eba);
 350                 } else {
 351                         ipu_clear_buffer_ready(ipu, CSI_PRP_ENC_MEM,
 352                                                IPU_OUTPUT_BUFFER,
 353                                                *buffer_num);
 354                         err = ipu_update_channel_buffer(ipu, CSI_PRP_ENC_MEM,
 355                                                         IPU_OUTPUT_BUFFER,
 356                                                         *buffer_num,
 357                                                         eba);
 358                 }
 359
 360                 if (err != 0) {
 361                         pr_err("ERROR: v4l2 capture: fail to update "
 362                                "buf%d\n", *buffer_num);
 363                         return err;
 364                 }
 365         }
 366
 367         if (grotation >= IPU_ROTATE_90_RIGHT) {
 368                 ipu_select_buffer(ipu, MEM_ROT_ENC_MEM, IPU_OUTPUT_BUFFER,
 369                                   *buffer_num);
 370         } else {
 371                 ipu_select_buffer(ipu, CSI_PRP_ENC_MEM, IPU_OUTPUT_BUFFER,
 372                                   *buffer_num);
 373         }
 374
 375         *buffer_num = (*buffer_num == 0) ? 1 : 0;
 376         return 0;
 377 }
 378
 379 /*!
 380  * Enable encoder task
 381  * @param private       struct cam_data * mxc capture instance
 382  *
 383  * @return  status
 384  */
 385 static int prp_enc_enabling_tasks(void *private)
 386 {
 387         cam_data *cam = (cam_data *) private;
 388         int err = 0;
 389         CAMERA_TRACE("IPU:In prp_enc_enabling_tasks\n");
 390
 391         cam->dummy_frame.vaddress = dma_alloc_coherent(0,
 392                                PAGE_ALIGN(cam->v2f.fmt.pix.sizeimage),
 393                                &cam->dummy_frame.paddress,
 394                                GFP_DMA | GFP_KERNEL);
 395         if (cam->dummy_frame.vaddress == 0) {
 396                 pr_err("ERROR: v4l2 capture: Allocate dummy frame "
 397                        "failed.\n");
 398                 return -ENOBUFS;
 399         }
 400         cam->dummy_frame.buffer.type = V4L2_BUF_TYPE_PRIVATE;
 401         cam->dummy_frame.buffer.length =
 402             PAGE_ALIGN(cam->v2f.fmt.pix.sizeimage);
 403         cam->dummy_frame.buffer.m.offset = cam->dummy_frame.paddress;
 404
 405         if (cam->rotation >= IPU_ROTATE_90_RIGHT) {
 406                 err = ipu_request_irq(cam->ipu, IPU_IRQ_PRP_ENC_ROT_OUT_EOF,
 407                                       prp_enc_callback, 0, "Mxc Camera", cam);
 408         } else {
 409                 err = ipu_request_irq(cam->ipu, IPU_IRQ_PRP_ENC_OUT_EOF,
 410                                       prp_enc_callback, 0, "Mxc Camera", cam);
 411         }
 412         if (err != 0) {
 413                 printk(KERN_ERR "Error registering rot irq\n");
 414                 return err;
 415         }
 416
 417         err = prp_enc_setup(cam);
 418         if (err != 0) {
 419                 printk(KERN_ERR "prp_enc_setup %d\n", err);
 420                 return err;
 421         }
 422
 423         return err;
 424 }
 425
 426 /*!
 427  * Disable encoder task
 428  * @param private       struct cam_data * mxc capture instance
 429  *
 430  * @return  int
 431  */
 432 static int prp_enc_disabling_tasks(void *private)
 433 {
 434         cam_data *cam = (cam_data *) private;
 435         int err = 0;
 436 #ifdef CONFIG_MXC_MIPI_CSI2
 437         void *mipi_csi2_info;
 438         int ipu_id;
 439         int csi_id;
 440 #endif
 441
 442         if (cam->rotation >= IPU_ROTATE_90_RIGHT) {
 443                 ipu_free_irq(cam->ipu, IPU_IRQ_PRP_ENC_ROT_OUT_EOF, cam);
 444                 ipu_unlink_channels(cam->ipu, CSI_PRP_ENC_MEM, MEM_ROT_ENC_MEM);
 445         }
 446
 447         err = ipu_disable_channel(cam->ipu, CSI_PRP_ENC_MEM, true);
 448         if (cam->rotation >= IPU_ROTATE_90_RIGHT)
 449                 err |= ipu_disable_channel(cam->ipu, MEM_ROT_ENC_MEM, true);
 450
 451         ipu_uninit_channel(cam->ipu, CSI_PRP_ENC_MEM);
 452         if (cam->rotation >= IPU_ROTATE_90_RIGHT)
 453                 ipu_uninit_channel(cam->ipu, MEM_ROT_ENC_MEM);
 454
 455         if (cam->dummy_frame.vaddress != 0) {
 456                 dma_free_coherent(0, cam->dummy_frame.buffer.length,
 457                                   cam->dummy_frame.vaddress,
 458                                   cam->dummy_frame.paddress);
 459                 cam->dummy_frame.vaddress = 0;
 460         }
 461
 462 #ifdef CONFIG_MXC_MIPI_CSI2
 463         mipi_csi2_info = mipi_csi2_get_info();
 464
 465         if (mipi_csi2_info) {
 466                 if (mipi_csi2_get_status(mipi_csi2_info)) {
 467                         ipu_id = mipi_csi2_get_bind_ipu(mipi_csi2_info);
 468                         csi_id = mipi_csi2_get_bind_csi(mipi_csi2_info);
 469
 470                         if (cam->ipu == ipu_get_soc(ipu_id)
 471                                 && cam->csi == csi_id)
 472                                 mipi_csi2_pixelclk_disable(mipi_csi2_info);
 473                 }
 474         } else {
 475                 printk(KERN_ERR "%s() in %s: Fail to get mipi_csi2_info!\n",
 476                        __func__, __FILE__);
 477                 return -EPERM;
 478         }
 479 #endif
 480
 481         return err;
 482 }
 483
 484 /*!
 485  * Enable csi
 486  * @param private       struct cam_data * mxc capture instance
 487  *
 488  * @return  status
 489  */
 490 static int prp_enc_enable_csi(void *private)
 491 {
 492         cam_data *cam = (cam_data *) private;
 493
 494         return ipu_enable_csi(cam->ipu, cam->csi);
 495 }
 496
 497 /*!
 498  * Disable csi
 499  * @param private       struct cam_data * mxc capture instance
 500  *
 501  * @return  status
 502  */
 503 static int prp_enc_disable_csi(void *private)
 504 {
 505         cam_data *cam = (cam_data *) private;
 506
 507         /* free csi eof irq firstly.
 508          * when disable csi, wait for idmac eof.
 509          * it requests eof irq again */
 510         if (cam->rotation < IPU_ROTATE_90_RIGHT)
 511                 ipu_free_irq(cam->ipu, IPU_IRQ_PRP_ENC_OUT_EOF, cam);
 512
 513         return ipu_disable_csi(cam->ipu, cam->csi);
 514 }
 515
 516 /*!
 517  * function to select PRP-ENC as the working path
 518  *
 519  * @param private       struct cam_data * mxc capture instance
 520  *
 521  * @return  int
 522  */
 523 int prp_enc_select(void *private)
 524 {
 525         cam_data *cam = (cam_data *) private;
 526         int err = 0;
 527
 528         if (cam) {
 529                 cam->enc_update_eba = prp_enc_eba_update;
 530                 cam->enc_enable = prp_enc_enabling_tasks;
 531                 cam->enc_disable = prp_enc_disabling_tasks;
 532                 cam->enc_enable_csi = prp_enc_enable_csi;
 533                 cam->enc_disable_csi = prp_enc_disable_csi;
 534         } else {
 535                 err = -EIO;
 536         }
 537
 538         return err;
 539 }
 540 EXPORT_SYMBOL(prp_enc_select);
 541
 542 /*!
 543  * function to de-select PRP-ENC as the working path
 544  *
 545  * @param private       struct cam_data * mxc capture instance
 546  *
 547  * @return  int
 548  */
 549 int prp_enc_deselect(void *private)
 550 {
 551         cam_data *cam = (cam_data *) private;
 552         int err = 0;
 553
 554         if (cam) {
 555                 cam->enc_update_eba = NULL;
 556                 cam->enc_enable = NULL;
 557                 cam->enc_disable = NULL;
 558                 cam->enc_enable_csi = NULL;
 559                 cam->enc_disable_csi = NULL;
 560                 if (cam->rot_enc_bufs_vaddr[0]) {
 561                         dma_free_coherent(0, cam->rot_enc_buf_size[0],
 562                                           cam->rot_enc_bufs_vaddr[0],
 563                                           cam->rot_enc_bufs[0]);
 564                         cam->rot_enc_bufs_vaddr[0] = NULL;
 565                         cam->rot_enc_bufs[0] = 0;
 566                 }
 567                 if (cam->rot_enc_bufs_vaddr[1]) {
 568                         dma_free_coherent(0, cam->rot_enc_buf_size[1],
 569                                           cam->rot_enc_bufs_vaddr[1],
 570                                           cam->rot_enc_bufs[1]);
 571                         cam->rot_enc_bufs_vaddr[1] = NULL;
 572                         cam->rot_enc_bufs[1] = 0;
 573                 }
 574         }
 575
 576         return err;
 577 }
 578 EXPORT_SYMBOL(prp_enc_deselect);
 579
 580 /*!
 581  * Init the Encorder channels
 582  *
 583  * @return  Error code indicating success or failure
 584  */
 585 __init int prp_enc_init(void)
 586 {
 587         return 0;
 588 }
 589
 590 /*!
 591  * Deinit the Encorder channels
 592  *
 593  */
 594 void __exit prp_enc_exit(void)
 595 {
 596 }
 597
 598 module_init(prp_enc_init);
 599 module_exit(prp_enc_exit);
 600
 601 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
 602 MODULE_DESCRIPTION("IPU PRP ENC Driver");
 603 MODULE_LICENSE("GPL");