drivers/media/platform/soc_camera/rcar_vin.c

   1 /*
   2  * SoC-camera host driver for Renesas R-Car VIN unit
   3  *
   4  * Copyright (C) 2011-2013 Renesas Solutions Corp.
   5  * Copyright (C) 2013 Cogent Embedded, Inc., <source@cogentembedded.com>
   6  *
   7  * Based on V4L2 Driver for SuperH Mobile CEU interface "sh_mobile_ceu_camera.c"
   8  *
   9  * Copyright (C) 2008 Magnus Damm
  10  *
  11  * This program is free software; you can redistribute  it and/or modify it
  12  * under  the terms of  the GNU General  Public License as published by the
  13  * Free Software Foundation;  either version 2 of the  License, or (at your
  14  * option) any later version.
  15  */
  16
  17 #include <linux/delay.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/kernel.h>
  20 #include <linux/module.h>
  21 #include <linux/platform_data/camera-rcar.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/pm_runtime.h>
  24 #include <linux/slab.h>
  25 #include <linux/videodev2.h>
  26
  27 #include <media/soc_camera.h>
  28 #include <media/soc_mediabus.h>
  29 #include <media/v4l2-common.h>
  30 #include <media/v4l2-dev.h>
  31 #include <media/v4l2-device.h>
  32 #include <media/v4l2-mediabus.h>
  33 #include <media/v4l2-subdev.h>
  34 #include <media/videobuf2-dma-contig.h>
  35
  36 #include "soc_scale_crop.h"
  37
  38 #define DRV_NAME "rcar_vin"
  39
  40 /* Register offsets for R-Car VIN */
  41 #define VNMC_REG        0x00    /* Video n Main Control Register */
  42 #define VNMS_REG        0x04    /* Video n Module Status Register */
  43 #define VNFC_REG        0x08    /* Video n Frame Capture Register */
  44 #define VNSLPRC_REG     0x0C    /* Video n Start Line Pre-Clip Register */
  45 #define VNELPRC_REG     0x10    /* Video n End Line Pre-Clip Register */
  46 #define VNSPPRC_REG     0x14    /* Video n Start Pixel Pre-Clip Register */
  47 #define VNEPPRC_REG     0x18    /* Video n End Pixel Pre-Clip Register */
  48 #define VNSLPOC_REG     0x1C    /* Video n Start Line Post-Clip Register */
  49 #define VNELPOC_REG     0x20    /* Video n End Line Post-Clip Register */
  50 #define VNSPPOC_REG     0x24    /* Video n Start Pixel Post-Clip Register */
  51 #define VNEPPOC_REG     0x28    /* Video n End Pixel Post-Clip Register */
  52 #define VNIS_REG        0x2C    /* Video n Image Stride Register */
  53 #define VNMB_REG(m)     (0x30 + ((m) << 2)) /* Video n Memory Base m Register */
  54 #define VNIE_REG        0x40    /* Video n Interrupt Enable Register */
  55 #define VNINTS_REG      0x44    /* Video n Interrupt Status Register */
  56 #define VNSI_REG        0x48    /* Video n Scanline Interrupt Register */
  57 #define VNMTC_REG       0x4C    /* Video n Memory Transfer Control Register */
  58 #define VNYS_REG        0x50    /* Video n Y Scale Register */
  59 #define VNXS_REG        0x54    /* Video n X Scale Register */
  60 #define VNDMR_REG       0x58    /* Video n Data Mode Register */
  61 #define VNDMR2_REG      0x5C    /* Video n Data Mode Register 2 */
  62 #define VNUVAOF_REG     0x60    /* Video n UV Address Offset Register */
  63
  64 /* Register bit fields for R-Car VIN */
  65 /* Video n Main Control Register bits */
  66 #define VNMC_FOC                (1 << 21)
  67 #define VNMC_YCAL               (1 << 19)
  68 #define VNMC_INF_YUV8_BT656     (0 << 16)
  69 #define VNMC_INF_YUV8_BT601     (1 << 16)
  70 #define VNMC_INF_YUV16          (5 << 16)
  71 #define VNMC_VUP                (1 << 10)
  72 #define VNMC_IM_ODD             (0 << 3)
  73 #define VNMC_IM_ODD_EVEN        (1 << 3)
  74 #define VNMC_IM_EVEN            (2 << 3)
  75 #define VNMC_IM_FULL            (3 << 3)
  76 #define VNMC_BPS                (1 << 1)
  77 #define VNMC_ME                 (1 << 0)
  78
  79 /* Video n Module Status Register bits */
  80 #define VNMS_FBS_MASK           (3 << 3)
  81 #define VNMS_FBS_SHIFT          3
  82 #define VNMS_AV                 (1 << 1)
  83 #define VNMS_CA                 (1 << 0)
  84
  85 /* Video n Frame Capture Register bits */
  86 #define VNFC_C_FRAME            (1 << 1)
  87 #define VNFC_S_FRAME            (1 << 0)
  88
  89 /* Video n Interrupt Enable Register bits */
  90 #define VNIE_FIE                (1 << 4)
  91 #define VNIE_EFE                (1 << 1)
  92
  93 /* Video n Data Mode Register bits */
  94 #define VNDMR_EXRGB             (1 << 8)
  95 #define VNDMR_BPSM              (1 << 4)
  96 #define VNDMR_DTMD_YCSEP        (1 << 1)
  97 #define VNDMR_DTMD_ARGB1555     (1 << 0)
  98
  99 /* Video n Data Mode Register 2 bits */
 100 #define VNDMR2_VPS              (1 << 30)
 101 #define VNDMR2_HPS              (1 << 29)
 102 #define VNDMR2_FTEV             (1 << 17)
 103
 104 #define VIN_MAX_WIDTH           2048
 105 #define VIN_MAX_HEIGHT          2048
 106
 107 enum chip_id {
 108         RCAR_H1,
 109         RCAR_M1,
 110         RCAR_E1,
 111 };
 112
 113 enum rcar_vin_state {
 114         STOPPED = 0,
 115         RUNNING,
 116         STOPPING,
 117 };
 118
 119 struct rcar_vin_priv {
 120         void __iomem                    *base;
 121         spinlock_t                      lock;
 122         int                             sequence;
 123         /* State of the VIN module in capturing mode */
 124         enum rcar_vin_state             state;
 125         struct rcar_vin_platform_data   *pdata;
 126         struct soc_camera_host          ici;
 127         struct list_head                capture;
 128 #define MAX_BUFFER_NUM                  3
 129         struct vb2_buffer               *queue_buf[MAX_BUFFER_NUM];
 130         struct vb2_alloc_ctx            *alloc_ctx;
 131         enum v4l2_field                 field;
 132         unsigned int                    vb_count;
 133         unsigned int                    nr_hw_slots;
 134         bool                            request_to_stop;
 135         struct completion               capture_stop;
 136         enum chip_id                    chip;
 137 };
 138
 139 #define is_continuous_transfer(priv)    (priv->vb_count > MAX_BUFFER_NUM)
 140
 141 struct rcar_vin_buffer {
 142         struct vb2_buffer               vb;
 143         struct list_head                list;
 144 };
 145
 146 #define to_buf_list(vb2_buffer) (&container_of(vb2_buffer, \
 147                                                        struct rcar_vin_buffer, \
 148                                                        vb)->list)
 149
 150 struct rcar_vin_cam {
 151         /* VIN offsets within the camera output, before the VIN scaler */
 152         unsigned int                    vin_left;
 153         unsigned int                    vin_top;
 154         /* Client output, as seen by the VIN */
 155         unsigned int                    width;
 156         unsigned int                    height;
 157         /*
 158          * User window from S_CROP / G_CROP, produced by client cropping and
 159          * scaling, VIN scaling and VIN cropping, mapped back onto the client
 160          * input window
 161          */
 162         struct v4l2_rect                subrect;
 163         /* Camera cropping rectangle */
 164         struct v4l2_rect                rect;
 165         const struct soc_mbus_pixelfmt  *extra_fmt;
 166 };
 167
 168 /*
 169  * .queue_setup() is called to check whether the driver can accept the requested
 170  * number of buffers and to fill in plane sizes for the current frame format if
 171  * required
 172  */
 173 static int rcar_vin_videobuf_setup(struct vb2_queue *vq,
 174                                    const struct v4l2_format *fmt,
 175                                    unsigned int *count,
 176                                    unsigned int *num_planes,
 177                                    unsigned int sizes[], void *alloc_ctxs[])
 178 {
 179         struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
 180         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 181         struct rcar_vin_priv *priv = ici->priv;
 182
 183         if (fmt) {
 184                 const struct soc_camera_format_xlate *xlate;
 185                 unsigned int bytes_per_line;
 186                 int ret;
 187
 188                 xlate = soc_camera_xlate_by_fourcc(icd,
 189                                                    fmt->fmt.pix.pixelformat);
 190                 if (!xlate)
 191                         return -EINVAL;
 192                 ret = soc_mbus_bytes_per_line(fmt->fmt.pix.width,
 193                                               xlate->host_fmt);
 194                 if (ret < 0)
 195                         return ret;
 196
 197                 bytes_per_line = max_t(u32, fmt->fmt.pix.bytesperline, ret);
 198
 199                 ret = soc_mbus_image_size(xlate->host_fmt, bytes_per_line,
 200                                           fmt->fmt.pix.height);
 201                 if (ret < 0)
 202                         return ret;
 203
 204                 sizes[0] = max_t(u32, fmt->fmt.pix.sizeimage, ret);
 205         } else {
 206                 /* Called from VIDIOC_REQBUFS or in compatibility mode */
 207                 sizes[0] = icd->sizeimage;
 208         }
 209
 210         alloc_ctxs[0] = priv->alloc_ctx;
 211
 212         if (!vq->num_buffers)
 213                 priv->sequence = 0;
 214
 215         if (!*count)
 216                 *count = 2;
 217         priv->vb_count = *count;
 218
 219         *num_planes = 1;
 220
 221         /* Number of hardware slots */
 222         if (is_continuous_transfer(priv))
 223                 priv->nr_hw_slots = MAX_BUFFER_NUM;
 224         else
 225                 priv->nr_hw_slots = 1;
 226
 227         dev_dbg(icd->parent, "count=%d, size=%u\n", *count, sizes[0]);
 228
 229         return 0;
 230 }
 231
 232 static int rcar_vin_setup(struct rcar_vin_priv *priv)
 233 {
 234         struct soc_camera_device *icd = priv->ici.icd;
 235         struct rcar_vin_cam *cam = icd->host_priv;
 236         u32 vnmc, dmr, interrupts;
 237         bool progressive = false, output_is_yuv = false;
 238
 239         switch (priv->field) {
 240         case V4L2_FIELD_TOP:
 241                 vnmc = VNMC_IM_ODD;
 242                 break;
 243         case V4L2_FIELD_BOTTOM:
 244                 vnmc = VNMC_IM_EVEN;
 245                 break;
 246         case V4L2_FIELD_INTERLACED:
 247         case V4L2_FIELD_INTERLACED_TB:
 248                 vnmc = VNMC_IM_FULL;
 249                 break;
 250         case V4L2_FIELD_INTERLACED_BT:
 251                 vnmc = VNMC_IM_FULL | VNMC_FOC;
 252                 break;
 253         case V4L2_FIELD_NONE:
 254                 if (is_continuous_transfer(priv)) {
 255                         vnmc = VNMC_IM_ODD_EVEN;
 256                         progressive = true;
 257                 } else {
 258                         vnmc = VNMC_IM_ODD;
 259                 }
 260                 break;
 261         default:
 262                 vnmc = VNMC_IM_ODD;
 263                 break;
 264         }
 265
 266         /* input interface */
 267         switch (icd->current_fmt->code) {
 268         case V4L2_MBUS_FMT_YUYV8_1X16:
 269                 /* BT.601/BT.1358 16bit YCbCr422 */
 270                 vnmc |= VNMC_INF_YUV16;
 271                 break;
 272         case V4L2_MBUS_FMT_YUYV8_2X8:
 273                 /* BT.656 8bit YCbCr422 or BT.601 8bit YCbCr422 */
 274                 vnmc |= priv->pdata->flags & RCAR_VIN_BT656 ?
 275                         VNMC_INF_YUV8_BT656 : VNMC_INF_YUV8_BT601;
 276         default:
 277                 break;
 278         }
 279
 280         /* output format */
 281         switch (icd->current_fmt->host_fmt->fourcc) {
 282         case V4L2_PIX_FMT_NV16:
 283                 iowrite32(ALIGN(cam->width * cam->height, 0x80),
 284                           priv->base + VNUVAOF_REG);
 285                 dmr = VNDMR_DTMD_YCSEP;
 286                 output_is_yuv = true;
 287                 break;
 288         case V4L2_PIX_FMT_YUYV:
 289                 dmr = VNDMR_BPSM;
 290                 output_is_yuv = true;
 291                 break;
 292         case V4L2_PIX_FMT_UYVY:
 293                 dmr = 0;
 294                 output_is_yuv = true;
 295                 break;
 296         case V4L2_PIX_FMT_RGB555X:
 297                 dmr = VNDMR_DTMD_ARGB1555;
 298                 break;
 299         case V4L2_PIX_FMT_RGB565:
 300                 dmr = 0;
 301                 break;
 302         case V4L2_PIX_FMT_RGB32:
 303                 if (priv->chip == RCAR_H1 || priv->chip == RCAR_E1) {
 304                         dmr = VNDMR_EXRGB;
 305                         break;
 306                 }
 307         default:
 308                 dev_warn(icd->parent, "Invalid fourcc format (0x%x)\n",
 309                          icd->current_fmt->host_fmt->fourcc);
 310                 return -EINVAL;
 311         }
 312
 313         /* Always update on field change */
 314         vnmc |= VNMC_VUP;
 315
 316         /* If input and output use the same colorspace, use bypass mode */
 317         if (output_is_yuv)
 318                 vnmc |= VNMC_BPS;
 319
 320         /* progressive or interlaced mode */
 321         interrupts = progressive ? VNIE_FIE | VNIE_EFE : VNIE_EFE;
 322
 323         /* ack interrupts */
 324         iowrite32(interrupts, priv->base + VNINTS_REG);
 325         /* enable interrupts */
 326         iowrite32(interrupts, priv->base + VNIE_REG);
 327         /* start capturing */
 328         iowrite32(dmr, priv->base + VNDMR_REG);
 329         iowrite32(vnmc | VNMC_ME, priv->base + VNMC_REG);
 330
 331         return 0;
 332 }
 333
 334 static void rcar_vin_capture(struct rcar_vin_priv *priv)
 335 {
 336         if (is_continuous_transfer(priv))
 337                 /* Continuous Frame Capture Mode */
 338                 iowrite32(VNFC_C_FRAME, priv->base + VNFC_REG);
 339         else
 340                 /* Single Frame Capture Mode */
 341                 iowrite32(VNFC_S_FRAME, priv->base + VNFC_REG);
 342 }
 343
 344 static void rcar_vin_request_capture_stop(struct rcar_vin_priv *priv)
 345 {
 346         priv->state = STOPPING;
 347
 348         /* set continuous & single transfer off */
 349         iowrite32(0, priv->base + VNFC_REG);
 350         /* disable capture (release DMA buffer), reset */
 351         iowrite32(ioread32(priv->base + VNMC_REG) & ~VNMC_ME,
 352                   priv->base + VNMC_REG);
 353
 354         /* update the status if stopped already */
 355         if (!(ioread32(priv->base + VNMS_REG) & VNMS_CA))
 356                 priv->state = STOPPED;
 357 }
 358
 359 static int rcar_vin_get_free_hw_slot(struct rcar_vin_priv *priv)
 360 {
 361         int slot;
 362
 363         for (slot = 0; slot < priv->nr_hw_slots; slot++)
 364                 if (priv->queue_buf[slot] == NULL)
 365                         return slot;
 366
 367         return -1;
 368 }
 369
 370 static int rcar_vin_hw_ready(struct rcar_vin_priv *priv)
 371 {
 372         /* Ensure all HW slots are filled */
 373         return rcar_vin_get_free_hw_slot(priv) < 0 ? 1 : 0;
 374 }
 375
 376 /* Moves a buffer from the queue to the HW slots */
 377 static int rcar_vin_fill_hw_slot(struct rcar_vin_priv *priv)
 378 {
 379         struct vb2_buffer *vb;
 380         dma_addr_t phys_addr_top;
 381         int slot;
 382
 383         if (list_empty(&priv->capture))
 384                 return 0;
 385
 386         /* Find a free HW slot */
 387         slot = rcar_vin_get_free_hw_slot(priv);
 388         if (slot < 0)
 389                 return 0;
 390
 391         vb = &list_entry(priv->capture.next, struct rcar_vin_buffer, list)->vb;
 392         list_del_init(to_buf_list(vb));
 393         priv->queue_buf[slot] = vb;
 394         phys_addr_top = vb2_dma_contig_plane_dma_addr(vb, 0);
 395         iowrite32(phys_addr_top, priv->base + VNMB_REG(slot));
 396
 397         return 1;
 398 }
 399
 400 static void rcar_vin_videobuf_queue(struct vb2_buffer *vb)
 401 {
 402         struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
 403         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 404         struct rcar_vin_priv *priv = ici->priv;
 405         unsigned long size;
 406
 407         size = icd->sizeimage;
 408
 409         if (vb2_plane_size(vb, 0) < size) {
 410                 dev_err(icd->parent, "Buffer #%d too small (%lu < %lu)\n",
 411                         vb->v4l2_buf.index, vb2_plane_size(vb, 0), size);
 412                 goto error;
 413         }
 414
 415         vb2_set_plane_payload(vb, 0, size);
 416
 417         dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
 418                 vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
 419
 420         spin_lock_irq(&priv->lock);
 421
 422         list_add_tail(to_buf_list(vb), &priv->capture);
 423         rcar_vin_fill_hw_slot(priv);
 424
 425         /* If we weren't running, and have enough buffers, start capturing! */
 426         if (priv->state != RUNNING && rcar_vin_hw_ready(priv)) {
 427                 if (rcar_vin_setup(priv)) {
 428                         /* Submit error */
 429                         list_del_init(to_buf_list(vb));
 430                         spin_unlock_irq(&priv->lock);
 431                         goto error;
 432                 }
 433                 priv->request_to_stop = false;
 434                 init_completion(&priv->capture_stop);
 435                 priv->state = RUNNING;
 436                 rcar_vin_capture(priv);
 437         }
 438
 439         spin_unlock_irq(&priv->lock);
 440
 441         return;
 442
 443 error:
 444         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
 445 }
 446
 447 static void rcar_vin_videobuf_release(struct vb2_buffer *vb)
 448 {
 449         struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
 450         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 451         struct rcar_vin_priv *priv = ici->priv;
 452         unsigned int i;
 453         int buf_in_use = 0;
 454
 455         spin_lock_irq(&priv->lock);
 456
 457         /* Is the buffer in use by the VIN hardware? */
 458         for (i = 0; i < MAX_BUFFER_NUM; i++) {
 459                 if (priv->queue_buf[i] == vb) {
 460                         buf_in_use = 1;
 461                         break;
 462                 }
 463         }
 464
 465         if (buf_in_use) {
 466                 while (priv->state != STOPPED) {
 467
 468                         /* issue stop if running */
 469                         if (priv->state == RUNNING)
 470                                 rcar_vin_request_capture_stop(priv);
 471
 472                         /* wait until capturing has been stopped */
 473                         if (priv->state == STOPPING) {
 474                                 priv->request_to_stop = true;
 475                                 spin_unlock_irq(&priv->lock);
 476                                 wait_for_completion(&priv->capture_stop);
 477                                 spin_lock_irq(&priv->lock);
 478                         }
 479                 }
 480                 /*
 481                  * Capturing has now stopped. The buffer we have been asked
 482                  * to release could be any of the current buffers in use, so
 483                  * release all buffers that are in use by HW
 484                  */
 485                 for (i = 0; i < MAX_BUFFER_NUM; i++) {
 486                         if (priv->queue_buf[i]) {
 487                                 vb2_buffer_done(priv->queue_buf[i],
 488                                         VB2_BUF_STATE_ERROR);
 489                                 priv->queue_buf[i] = NULL;
 490                         }
 491                 }
 492         } else {
 493                 list_del_init(to_buf_list(vb));
 494         }
 495
 496         spin_unlock_irq(&priv->lock);
 497 }
 498
 499 static int rcar_vin_videobuf_init(struct vb2_buffer *vb)
 500 {
 501         INIT_LIST_HEAD(to_buf_list(vb));
 502         return 0;
 503 }
 504
 505 static int rcar_vin_stop_streaming(struct vb2_queue *vq)
 506 {
 507         struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
 508         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 509         struct rcar_vin_priv *priv = ici->priv;
 510         struct list_head *buf_head, *tmp;
 511
 512         spin_lock_irq(&priv->lock);
 513         list_for_each_safe(buf_head, tmp, &priv->capture)
 514                 list_del_init(buf_head);
 515         spin_unlock_irq(&priv->lock);
 516
 517         return 0;
 518 }
 519
 520 static struct vb2_ops rcar_vin_vb2_ops = {
 521         .queue_setup    = rcar_vin_videobuf_setup,
 522         .buf_init       = rcar_vin_videobuf_init,
 523         .buf_cleanup    = rcar_vin_videobuf_release,
 524         .buf_queue      = rcar_vin_videobuf_queue,
 525         .stop_streaming = rcar_vin_stop_streaming,
 526         .wait_prepare   = soc_camera_unlock,
 527         .wait_finish    = soc_camera_lock,
 528 };
 529
 530 static irqreturn_t rcar_vin_irq(int irq, void *data)
 531 {
 532         struct rcar_vin_priv *priv = data;
 533         u32 int_status;
 534         bool can_run = false, hw_stopped;
 535         int slot;
 536         unsigned int handled = 0;
 537
 538         spin_lock(&priv->lock);
 539
 540         int_status = ioread32(priv->base + VNINTS_REG);
 541         if (!int_status)
 542                 goto done;
 543         /* ack interrupts */
 544         iowrite32(int_status, priv->base + VNINTS_REG);
 545         handled = 1;
 546
 547         /* nothing to do if capture status is 'STOPPED' */
 548         if (priv->state == STOPPED)
 549                 goto done;
 550
 551         hw_stopped = !(ioread32(priv->base + VNMS_REG) & VNMS_CA);
 552
 553         if (!priv->request_to_stop) {
 554                 if (is_continuous_transfer(priv))
 555                         slot = (ioread32(priv->base + VNMS_REG) &
 556                                 VNMS_FBS_MASK) >> VNMS_FBS_SHIFT;
 557                 else
 558                         slot = 0;
 559
 560                 priv->queue_buf[slot]->v4l2_buf.field = priv->field;
 561                 priv->queue_buf[slot]->v4l2_buf.sequence = priv->sequence++;
 562                 do_gettimeofday(&priv->queue_buf[slot]->v4l2_buf.timestamp);
 563                 vb2_buffer_done(priv->queue_buf[slot], VB2_BUF_STATE_DONE);
 564                 priv->queue_buf[slot] = NULL;
 565
 566                 if (priv->state != STOPPING)
 567                         can_run = rcar_vin_fill_hw_slot(priv);
 568
 569                 if (hw_stopped || !can_run) {
 570                         priv->state = STOPPED;
 571                 } else if (is_continuous_transfer(priv) &&
 572                            list_empty(&priv->capture) &&
 573                            priv->state == RUNNING) {
 574                         /*
 575                          * The continuous capturing requires an explicit stop
 576                          * operation when there is no buffer to be set into
 577                          * the VnMBm registers.
 578                          */
 579                         rcar_vin_request_capture_stop(priv);
 580                 } else {
 581                         rcar_vin_capture(priv);
 582                 }
 583
 584         } else if (hw_stopped) {
 585                 priv->state = STOPPED;
 586                 priv->request_to_stop = false;
 587                 complete(&priv->capture_stop);
 588         }
 589
 590 done:
 591         spin_unlock(&priv->lock);
 592
 593         return IRQ_RETVAL(handled);
 594 }
 595
 596 static int rcar_vin_add_device(struct soc_camera_device *icd)
 597 {
 598         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 599         struct rcar_vin_priv *priv = ici->priv;
 600         int i;
 601
 602         for (i = 0; i < MAX_BUFFER_NUM; i++)
 603                 priv->queue_buf[i] = NULL;
 604
 605         pm_runtime_get_sync(ici->v4l2_dev.dev);
 606
 607         dev_dbg(icd->parent, "R-Car VIN driver attached to camera %d\n",
 608                 icd->devnum);
 609
 610         return 0;
 611 }
 612
 613 static void rcar_vin_remove_device(struct soc_camera_device *icd)
 614 {
 615         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 616         struct rcar_vin_priv *priv = ici->priv;
 617         struct vb2_buffer *vb;
 618         int i;
 619
 620         /* disable capture, disable interrupts */
 621         iowrite32(ioread32(priv->base + VNMC_REG) & ~VNMC_ME,
 622                   priv->base + VNMC_REG);
 623         iowrite32(0, priv->base + VNIE_REG);
 624
 625         priv->state = STOPPED;
 626         priv->request_to_stop = false;
 627
 628         /* make sure active buffer is cancelled */
 629         spin_lock_irq(&priv->lock);
 630         for (i = 0; i < MAX_BUFFER_NUM; i++) {
 631                 vb = priv->queue_buf[i];
 632                 if (vb) {
 633                         list_del_init(to_buf_list(vb));
 634                         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
 635                 }
 636         }
 637         spin_unlock_irq(&priv->lock);
 638
 639         pm_runtime_put(ici->v4l2_dev.dev);
 640
 641         dev_dbg(icd->parent, "R-Car VIN driver detached from camera %d\n",
 642                 icd->devnum);
 643 }
 644
 645 /* Called with .host_lock held */
 646 static int rcar_vin_clock_start(struct soc_camera_host *ici)
 647 {
 648         /* VIN does not have "mclk" */
 649         return 0;
 650 }
 651
 652 /* Called with .host_lock held */
 653 static void rcar_vin_clock_stop(struct soc_camera_host *ici)
 654 {
 655         /* VIN does not have "mclk" */
 656 }
 657
 658 /* rect is guaranteed to not exceed the scaled camera rectangle */
 659 static int rcar_vin_set_rect(struct soc_camera_device *icd)
 660 {
 661         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 662         struct rcar_vin_cam *cam = icd->host_priv;
 663         struct rcar_vin_priv *priv = ici->priv;
 664         unsigned int left_offset, top_offset;
 665         unsigned char dsize = 0;
 666         struct v4l2_rect *cam_subrect = &cam->subrect;
 667
 668         dev_dbg(icd->parent, "Crop %ux%u@%u:%u\n",
 669                 icd->user_width, icd->user_height, cam->vin_left, cam->vin_top);
 670
 671         left_offset = cam->vin_left;
 672         top_offset = cam->vin_top;
 673
 674         if (icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_RGB32 &&
 675             priv->chip == RCAR_E1)
 676                 dsize = 1;
 677
 678         dev_dbg(icd->parent, "Cam %ux%u@%u:%u\n",
 679                 cam->width, cam->height, cam->vin_left, cam->vin_top);
 680         dev_dbg(icd->parent, "Cam subrect %ux%u@%u:%u\n",
 681                 cam_subrect->width, cam_subrect->height,
 682                 cam_subrect->left, cam_subrect->top);
 683
 684         /* Set Start/End Pixel/Line Pre-Clip */
 685         iowrite32(left_offset << dsize, priv->base + VNSPPRC_REG);
 686         iowrite32((left_offset + cam->width - 1) << dsize,
 687                   priv->base + VNEPPRC_REG);
 688         switch (priv->field) {
 689         case V4L2_FIELD_INTERLACED:
 690         case V4L2_FIELD_INTERLACED_TB:
 691         case V4L2_FIELD_INTERLACED_BT:
 692                 iowrite32(top_offset / 2, priv->base + VNSLPRC_REG);
 693                 iowrite32((top_offset + cam->height) / 2 - 1,
 694                           priv->base + VNELPRC_REG);
 695                 break;
 696         default:
 697                 iowrite32(top_offset, priv->base + VNSLPRC_REG);
 698                 iowrite32(top_offset + cam->height - 1,
 699                           priv->base + VNELPRC_REG);
 700                 break;
 701         }
 702
 703         /* Set Start/End Pixel/Line Post-Clip */
 704         iowrite32(0, priv->base + VNSPPOC_REG);
 705         iowrite32(0, priv->base + VNSLPOC_REG);
 706         iowrite32((cam_subrect->width - 1) << dsize, priv->base + VNEPPOC_REG);
 707         switch (priv->field) {
 708         case V4L2_FIELD_INTERLACED:
 709         case V4L2_FIELD_INTERLACED_TB:
 710         case V4L2_FIELD_INTERLACED_BT:
 711                 iowrite32(cam_subrect->height / 2 - 1,
 712                           priv->base + VNELPOC_REG);
 713                 break;
 714         default:
 715                 iowrite32(cam_subrect->height - 1, priv->base + VNELPOC_REG);
 716                 break;
 717         }
 718
 719         iowrite32(ALIGN(cam->width, 0x10), priv->base + VNIS_REG);
 720
 721         return 0;
 722 }
 723
 724 static void capture_stop_preserve(struct rcar_vin_priv *priv, u32 *vnmc)
 725 {
 726         *vnmc = ioread32(priv->base + VNMC_REG);
 727         /* module disable */
 728         iowrite32(*vnmc & ~VNMC_ME, priv->base + VNMC_REG);
 729 }
 730
 731 static void capture_restore(struct rcar_vin_priv *priv, u32 vnmc)
 732 {
 733         unsigned long timeout = jiffies + 10 * HZ;
 734
 735         /*
 736          * Wait until the end of the current frame. It can take a long time,
 737          * but if it has been aborted by a MRST1 reset, it should exit sooner.
 738          */
 739         while ((ioread32(priv->base + VNMS_REG) & VNMS_AV) &&
 740                 time_before(jiffies, timeout))
 741                 msleep(1);
 742
 743         if (time_after(jiffies, timeout)) {
 744                 dev_err(priv->ici.v4l2_dev.dev,
 745                         "Timeout waiting for frame end! Interface problem?\n");
 746                 return;
 747         }
 748
 749         iowrite32(vnmc, priv->base + VNMC_REG);
 750 }
 751
 752 #define VIN_MBUS_FLAGS  (V4L2_MBUS_MASTER |             \
 753                          V4L2_MBUS_PCLK_SAMPLE_RISING | \
 754                          V4L2_MBUS_HSYNC_ACTIVE_HIGH |  \
 755                          V4L2_MBUS_HSYNC_ACTIVE_LOW |   \
 756                          V4L2_MBUS_VSYNC_ACTIVE_HIGH |  \
 757                          V4L2_MBUS_VSYNC_ACTIVE_LOW |   \
 758                          V4L2_MBUS_DATA_ACTIVE_HIGH)
 759
 760 static int rcar_vin_set_bus_param(struct soc_camera_device *icd)
 761 {
 762         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 763         struct rcar_vin_priv *priv = ici->priv;
 764         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
 765         struct v4l2_mbus_config cfg;
 766         unsigned long common_flags;
 767         u32 vnmc;
 768         u32 val;
 769         int ret;
 770
 771         capture_stop_preserve(priv, &vnmc);
 772
 773         ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
 774         if (!ret) {
 775                 common_flags = soc_mbus_config_compatible(&cfg, VIN_MBUS_FLAGS);
 776                 if (!common_flags) {
 777                         dev_warn(icd->parent,
 778                                  "MBUS flags incompatible: camera 0x%x, host 0x%x\n",
 779                                  cfg.flags, VIN_MBUS_FLAGS);
 780                         return -EINVAL;
 781                 }
 782         } else if (ret != -ENOIOCTLCMD) {
 783                 return ret;
 784         } else {
 785                 common_flags = VIN_MBUS_FLAGS;
 786         }
 787
 788         /* Make choises, based on platform preferences */
 789         if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
 790             (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
 791                 if (priv->pdata->flags & RCAR_VIN_HSYNC_ACTIVE_LOW)
 792                         common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH;
 793                 else
 794                         common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW;
 795         }
 796
 797         if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) &&
 798             (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) {
 799                 if (priv->pdata->flags & RCAR_VIN_VSYNC_ACTIVE_LOW)
 800                         common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH;
 801                 else
 802                         common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW;
 803         }
 804
 805         cfg.flags = common_flags;
 806         ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg);
 807         if (ret < 0 && ret != -ENOIOCTLCMD)
 808                 return ret;
 809
 810         val = priv->field == V4L2_FIELD_NONE ? VNDMR2_FTEV : 0;
 811         if (!(common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW))
 812                 val |= VNDMR2_VPS;
 813         if (!(common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW))
 814                 val |= VNDMR2_HPS;
 815         iowrite32(val, priv->base + VNDMR2_REG);
 816
 817         ret = rcar_vin_set_rect(icd);
 818         if (ret < 0)
 819                 return ret;
 820
 821         capture_restore(priv, vnmc);
 822
 823         return 0;
 824 }
 825
 826 static int rcar_vin_try_bus_param(struct soc_camera_device *icd,
 827                                   unsigned char buswidth)
 828 {
 829         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
 830         struct v4l2_mbus_config cfg;
 831         int ret;
 832
 833         ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
 834         if (ret == -ENOIOCTLCMD)
 835                 return 0;
 836         else if (ret)
 837                 return ret;
 838
 839         if (buswidth > 24)
 840                 return -EINVAL;
 841
 842         /* check is there common mbus flags */
 843         ret = soc_mbus_config_compatible(&cfg, VIN_MBUS_FLAGS);
 844         if (ret)
 845                 return 0;
 846
 847         dev_warn(icd->parent,
 848                 "MBUS flags incompatible: camera 0x%x, host 0x%x\n",
 849                  cfg.flags, VIN_MBUS_FLAGS);
 850
 851         return -EINVAL;
 852 }
 853
 854 static bool rcar_vin_packing_supported(const struct soc_mbus_pixelfmt *fmt)
 855 {
 856         return  fmt->packing == SOC_MBUS_PACKING_NONE ||
 857                 (fmt->bits_per_sample > 8 &&
 858                  fmt->packing == SOC_MBUS_PACKING_EXTEND16);
 859 }
 860
 861 static const struct soc_mbus_pixelfmt rcar_vin_formats[] = {
 862         {
 863                 .fourcc                 = V4L2_PIX_FMT_NV16,
 864                 .name                   = "NV16",
 865                 .bits_per_sample        = 8,
 866                 .packing                = SOC_MBUS_PACKING_2X8_PADHI,
 867                 .order                  = SOC_MBUS_ORDER_LE,
 868                 .layout                 = SOC_MBUS_LAYOUT_PLANAR_Y_C,
 869         },
 870         {
 871                 .fourcc                 = V4L2_PIX_FMT_UYVY,
 872                 .name                   = "UYVY",
 873                 .bits_per_sample        = 16,
 874                 .packing                = SOC_MBUS_PACKING_NONE,
 875                 .order                  = SOC_MBUS_ORDER_LE,
 876                 .layout                 = SOC_MBUS_LAYOUT_PACKED,
 877         },
 878         {
 879                 .fourcc                 = V4L2_PIX_FMT_RGB565,
 880                 .name                   = "RGB565",
 881                 .bits_per_sample        = 16,
 882                 .packing                = SOC_MBUS_PACKING_NONE,
 883                 .order                  = SOC_MBUS_ORDER_LE,
 884                 .layout                 = SOC_MBUS_LAYOUT_PACKED,
 885         },
 886         {
 887                 .fourcc                 = V4L2_PIX_FMT_RGB555X,
 888                 .name                   = "ARGB1555",
 889                 .bits_per_sample        = 16,
 890                 .packing                = SOC_MBUS_PACKING_NONE,
 891                 .order                  = SOC_MBUS_ORDER_LE,
 892                 .layout                 = SOC_MBUS_LAYOUT_PACKED,
 893         },
 894         {
 895                 .fourcc                 = V4L2_PIX_FMT_RGB32,
 896                 .name                   = "RGB888",
 897                 .bits_per_sample        = 32,
 898                 .packing                = SOC_MBUS_PACKING_NONE,
 899                 .order                  = SOC_MBUS_ORDER_LE,
 900                 .layout                 = SOC_MBUS_LAYOUT_PACKED,
 901         },
 902 };
 903
 904 static int rcar_vin_get_formats(struct soc_camera_device *icd, unsigned int idx,
 905                                 struct soc_camera_format_xlate *xlate)
 906 {
 907         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
 908         struct device *dev = icd->parent;
 909         int ret, k, n;
 910         int formats = 0;
 911         struct rcar_vin_cam *cam;
 912         enum v4l2_mbus_pixelcode code;
 913         const struct soc_mbus_pixelfmt *fmt;
 914
 915         ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code);
 916         if (ret < 0)
 917                 return 0;
 918
 919         fmt = soc_mbus_get_fmtdesc(code);
 920         if (!fmt) {
 921                 dev_warn(dev, "unsupported format code #%u: %d\n", idx, code);
 922                 return 0;
 923         }
 924
 925         ret = rcar_vin_try_bus_param(icd, fmt->bits_per_sample);
 926         if (ret < 0)
 927                 return 0;
 928
 929         if (!icd->host_priv) {
 930                 struct v4l2_mbus_framefmt mf;
 931                 struct v4l2_rect rect;
 932                 struct device *dev = icd->parent;
 933                 int shift;
 934
 935                 ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
 936                 if (ret < 0)
 937                         return ret;
 938
 939                 /* Cache current client geometry */
 940                 ret = soc_camera_client_g_rect(sd, &rect);
 941                 if (ret == -ENOIOCTLCMD) {
 942                         /* Sensor driver doesn't support cropping */
 943                         rect.left = 0;
 944                         rect.top = 0;
 945                         rect.width = mf.width;
 946                         rect.height = mf.height;
 947                 } else if (ret < 0) {
 948                         return ret;
 949                 }
 950
 951                 /*
 952                  * If sensor proposes too large format then try smaller ones:
 953                  * 1280x960, 640x480, 320x240
 954                  */
 955                 for (shift = 0; shift < 3; shift++) {
 956                         if (mf.width <= VIN_MAX_WIDTH &&
 957                             mf.height <= VIN_MAX_HEIGHT)
 958                                 break;
 959
 960                         mf.width = 1280 >> shift;
 961                         mf.height = 960 >> shift;
 962                         ret = v4l2_device_call_until_err(sd->v4l2_dev,
 963                                                          soc_camera_grp_id(icd),
 964                                                          video, s_mbus_fmt,
 965                                                          &mf);
 966                         if (ret < 0)
 967                                 return ret;
 968                 }
 969
 970                 if (shift == 3) {
 971                         dev_err(dev,
 972                                 "Failed to configure the client below %ux%x\n",
 973                                 mf.width, mf.height);
 974                         return -EIO;
 975                 }
 976
 977                 dev_dbg(dev, "camera fmt %ux%u\n", mf.width, mf.height);
 978
 979                 cam = kzalloc(sizeof(*cam), GFP_KERNEL);
 980                 if (!cam)
 981                         return -ENOMEM;
 982                 /*
 983                  * We are called with current camera crop,
 984                  * initialise subrect with it
 985                  */
 986                 cam->rect = rect;
 987                 cam->subrect = rect;
 988                 cam->width = mf.width;
 989                 cam->height = mf.height;
 990
 991                 icd->host_priv = cam;
 992         } else {
 993                 cam = icd->host_priv;
 994         }
 995
 996         /* Beginning of a pass */
 997         if (!idx)
 998                 cam->extra_fmt = NULL;
 999
1000         switch (code) {
1001         case V4L2_MBUS_FMT_YUYV8_1X16:
1002         case V4L2_MBUS_FMT_YUYV8_2X8:
1003                 if (cam->extra_fmt)
1004                         break;
1005
1006                 /* Add all our formats that can be generated by VIN */
1007                 cam->extra_fmt = rcar_vin_formats;
1008
1009                 n = ARRAY_SIZE(rcar_vin_formats);
1010                 formats += n;
1011                 for (k = 0; xlate && k < n; k++, xlate++) {
1012                         xlate->host_fmt = &rcar_vin_formats[k];
1013                         xlate->code = code;
1014                         dev_dbg(dev, "Providing format %s using code %d\n",
1015                                 rcar_vin_formats[k].name, code);
1016                 }
1017                 break;
1018         default:
1019                 if (!rcar_vin_packing_supported(fmt))
1020                         return 0;
1021
1022                 dev_dbg(dev, "Providing format %s in pass-through mode\n",
1023                         fmt->name);
1024                 break;
1025         }
1026
1027         /* Generic pass-through */
1028         formats++;
1029         if (xlate) {
1030                 xlate->host_fmt = fmt;
1031                 xlate->code = code;
1032                 xlate++;
1033         }
1034
1035         return formats;
1036 }
1037
1038 static void rcar_vin_put_formats(struct soc_camera_device *icd)
1039 {
1040         kfree(icd->host_priv);
1041         icd->host_priv = NULL;
1042 }
1043
1044 static int rcar_vin_set_crop(struct soc_camera_device *icd,
1045                              const struct v4l2_crop *a)
1046 {
1047         struct v4l2_crop a_writable = *a;
1048         const struct v4l2_rect *rect = &a_writable.c;
1049         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1050         struct rcar_vin_priv *priv = ici->priv;
1051         struct v4l2_crop cam_crop;
1052         struct rcar_vin_cam *cam = icd->host_priv;
1053         struct v4l2_rect *cam_rect = &cam_crop.c;
1054         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1055         struct device *dev = icd->parent;
1056         struct v4l2_mbus_framefmt mf;
1057         u32 vnmc;
1058         int ret, i;
1059
1060         dev_dbg(dev, "S_CROP(%ux%u@%u:%u)\n", rect->width, rect->height,
1061                 rect->left, rect->top);
1062
1063         /* During camera cropping its output window can change too, stop VIN */
1064         capture_stop_preserve(priv, &vnmc);
1065         dev_dbg(dev, "VNMC_REG 0x%x\n", vnmc);
1066
1067         /* Apply iterative camera S_CROP for new input window. */
1068         ret = soc_camera_client_s_crop(sd, &a_writable, &cam_crop,
1069                                        &cam->rect, &cam->subrect);
1070         if (ret < 0)
1071                 return ret;
1072
1073         dev_dbg(dev, "camera cropped to %ux%u@%u:%u\n",
1074                 cam_rect->width, cam_rect->height,
1075                 cam_rect->left, cam_rect->top);
1076
1077         /* On success cam_crop contains current camera crop */
1078
1079         /* Retrieve camera output window */
1080         ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
1081         if (ret < 0)
1082                 return ret;
1083
1084         if (mf.width > VIN_MAX_WIDTH || mf.height > VIN_MAX_HEIGHT)
1085                 return -EINVAL;
1086
1087         /* Cache camera output window */
1088         cam->width = mf.width;
1089         cam->height = mf.height;
1090
1091         icd->user_width  = cam->width;
1092         icd->user_height = cam->height;
1093
1094         cam->vin_left = rect->left & ~1;
1095         cam->vin_top = rect->top & ~1;
1096
1097         /* Use VIN cropping to crop to the new window. */
1098         ret = rcar_vin_set_rect(icd);
1099         if (ret < 0)
1100                 return ret;
1101
1102         cam->subrect = *rect;
1103
1104         dev_dbg(dev, "VIN cropped to %ux%u@%u:%u\n",
1105                 icd->user_width, icd->user_height,
1106                 cam->vin_left, cam->vin_top);
1107
1108         /* Restore capture */
1109         for (i = 0; i < MAX_BUFFER_NUM; i++) {
1110                 if (priv->queue_buf[i] && priv->state == STOPPED) {
1111                         vnmc |= VNMC_ME;
1112                         break;
1113                 }
1114         }
1115         capture_restore(priv, vnmc);
1116
1117         /* Even if only camera cropping succeeded */
1118         return ret;
1119 }
1120
1121 static int rcar_vin_get_crop(struct soc_camera_device *icd,
1122                              struct v4l2_crop *a)
1123 {
1124         struct rcar_vin_cam *cam = icd->host_priv;
1125
1126         a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1127         a->c = cam->subrect;
1128
1129         return 0;
1130 }
1131
1132 /* Similar to set_crop multistage iterative algorithm */
1133 static int rcar_vin_set_fmt(struct soc_camera_device *icd,
1134                             struct v4l2_format *f)
1135 {
1136         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1137         struct rcar_vin_priv *priv = ici->priv;
1138         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1139         struct rcar_vin_cam *cam = icd->host_priv;
1140         struct v4l2_pix_format *pix = &f->fmt.pix;
1141         struct v4l2_mbus_framefmt mf;
1142         struct device *dev = icd->parent;
1143         __u32 pixfmt = pix->pixelformat;
1144         const struct soc_camera_format_xlate *xlate;
1145         unsigned int vin_sub_width = 0, vin_sub_height = 0;
1146         int ret;
1147         bool can_scale;
1148         enum v4l2_field field;
1149         v4l2_std_id std;
1150
1151         dev_dbg(dev, "S_FMT(pix=0x%x, %ux%u)\n",
1152                 pixfmt, pix->width, pix->height);
1153
1154         switch (pix->field) {
1155         default:
1156                 pix->field = V4L2_FIELD_NONE;
1157                 /* fall-through */
1158         case V4L2_FIELD_NONE:
1159         case V4L2_FIELD_TOP:
1160         case V4L2_FIELD_BOTTOM:
1161         case V4L2_FIELD_INTERLACED_TB:
1162         case V4L2_FIELD_INTERLACED_BT:
1163                 field = pix->field;
1164                 break;
1165         case V4L2_FIELD_INTERLACED:
1166                 /* Query for standard if not explicitly mentioned _TB/_BT */
1167                 ret = v4l2_subdev_call(sd, video, querystd, &std);
1168                 if (ret < 0)
1169                         std = V4L2_STD_625_50;
1170
1171                 field = std & V4L2_STD_625_50 ? V4L2_FIELD_INTERLACED_TB :
1172                                                 V4L2_FIELD_INTERLACED_BT;
1173                 break;
1174         }
1175
1176         xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1177         if (!xlate) {
1178                 dev_warn(dev, "Format %x not found\n", pixfmt);
1179                 return -EINVAL;
1180         }
1181         /* Calculate client output geometry */
1182         soc_camera_calc_client_output(icd, &cam->rect, &cam->subrect, pix, &mf,
1183                                       12);
1184         mf.field = pix->field;
1185         mf.colorspace = pix->colorspace;
1186         mf.code  = xlate->code;
1187
1188         switch (pixfmt) {
1189         case V4L2_PIX_FMT_RGB32:
1190                 can_scale = priv->chip != RCAR_E1;
1191                 break;
1192         case V4L2_PIX_FMT_UYVY:
1193         case V4L2_PIX_FMT_YUYV:
1194         case V4L2_PIX_FMT_RGB565:
1195         case V4L2_PIX_FMT_RGB555X:
1196                 can_scale = true;
1197                 break;
1198         default:
1199                 can_scale = false;
1200                 break;
1201         }
1202
1203         dev_dbg(dev, "request camera output %ux%u\n", mf.width, mf.height);
1204
1205         ret = soc_camera_client_scale(icd, &cam->rect, &cam->subrect,
1206                                       &mf, &vin_sub_width, &vin_sub_height,
1207                                       can_scale, 12);
1208
1209         /* Done with the camera. Now see if we can improve the result */
1210         dev_dbg(dev, "Camera %d fmt %ux%u, requested %ux%u\n",
1211                 ret, mf.width, mf.height, pix->width, pix->height);
1212
1213         if (ret == -ENOIOCTLCMD)
1214                 dev_dbg(dev, "Sensor doesn't support scaling\n");
1215         else if (ret < 0)
1216                 return ret;
1217
1218         if (mf.code != xlate->code)
1219                 return -EINVAL;
1220
1221         /* Prepare VIN crop */
1222         cam->width = mf.width;
1223         cam->height = mf.height;
1224
1225         /* Use VIN scaling to scale to the requested user window. */
1226
1227         /* We cannot scale up */
1228         if (pix->width > vin_sub_width)
1229                 vin_sub_width = pix->width;
1230
1231         if (pix->height > vin_sub_height)
1232                 vin_sub_height = pix->height;
1233
1234         pix->colorspace = mf.colorspace;
1235
1236         if (!can_scale) {
1237                 pix->width = vin_sub_width;
1238                 pix->height = vin_sub_height;
1239         }
1240
1241         /*
1242          * We have calculated CFLCR, the actual configuration will be performed
1243          * in rcar_vin_set_bus_param()
1244          */
1245
1246         dev_dbg(dev, "W: %u : %u, H: %u : %u\n",
1247                 vin_sub_width, pix->width, vin_sub_height, pix->height);
1248
1249         icd->current_fmt = xlate;
1250
1251         priv->field = field;
1252
1253         return 0;
1254 }
1255
1256 static int rcar_vin_try_fmt(struct soc_camera_device *icd,
1257                             struct v4l2_format *f)
1258 {
1259         const struct soc_camera_format_xlate *xlate;
1260         struct v4l2_pix_format *pix = &f->fmt.pix;
1261         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1262         struct v4l2_mbus_framefmt mf;
1263         __u32 pixfmt = pix->pixelformat;
1264         int width, height;
1265         int ret;
1266
1267         xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1268         if (!xlate) {
1269                 xlate = icd->current_fmt;
1270                 dev_dbg(icd->parent, "Format %x not found, keeping %x\n",
1271                         pixfmt, xlate->host_fmt->fourcc);
1272                 pixfmt = xlate->host_fmt->fourcc;
1273                 pix->pixelformat = pixfmt;
1274                 pix->colorspace = icd->colorspace;
1275         }
1276
1277         /* FIXME: calculate using depth and bus width */
1278         v4l_bound_align_image(&pix->width, 2, VIN_MAX_WIDTH, 1,
1279                               &pix->height, 4, VIN_MAX_HEIGHT, 2, 0);
1280
1281         width = pix->width;
1282         height = pix->height;
1283
1284         /* let soc-camera calculate these values */
1285         pix->bytesperline = 0;
1286         pix->sizeimage = 0;
1287
1288         /* limit to sensor capabilities */
1289         mf.width = pix->width;
1290         mf.height = pix->height;
1291         mf.field = pix->field;
1292         mf.code = xlate->code;
1293         mf.colorspace = pix->colorspace;
1294
1295         ret = v4l2_device_call_until_err(sd->v4l2_dev, soc_camera_grp_id(icd),
1296                                          video, try_mbus_fmt, &mf);
1297         if (ret < 0)
1298                 return ret;
1299
1300         pix->width = mf.width;
1301         pix->height = mf.height;
1302         pix->field = mf.field;
1303         pix->colorspace = mf.colorspace;
1304
1305         if (pixfmt == V4L2_PIX_FMT_NV16) {
1306                 /* FIXME: check against rect_max after converting soc-camera */
1307                 /* We can scale precisely, need a bigger image from camera */
1308                 if (pix->width < width || pix->height < height) {
1309                         /*
1310                          * We presume, the sensor behaves sanely, i.e. if
1311                          * requested a bigger rectangle, it will not return a
1312                          * smaller one.
1313                          */
1314                         mf.width = VIN_MAX_WIDTH;
1315                         mf.height = VIN_MAX_HEIGHT;
1316                         ret = v4l2_device_call_until_err(sd->v4l2_dev,
1317                                                          soc_camera_grp_id(icd),
1318                                                          video, try_mbus_fmt,
1319                                                          &mf);
1320                         if (ret < 0) {
1321                                 dev_err(icd->parent,
1322                                         "client try_fmt() = %d\n", ret);
1323                                 return ret;
1324                         }
1325                 }
1326                 /* We will scale exactly */
1327                 if (mf.width > width)
1328                         pix->width = width;
1329                 if (mf.height > height)
1330                         pix->height = height;
1331         }
1332
1333         return ret;
1334 }
1335
1336 static unsigned int rcar_vin_poll(struct file *file, poll_table *pt)
1337 {
1338         struct soc_camera_device *icd = file->private_data;
1339
1340         return vb2_poll(&icd->vb2_vidq, file, pt);
1341 }
1342
1343 static int rcar_vin_querycap(struct soc_camera_host *ici,
1344                              struct v4l2_capability *cap)
1345 {
1346         strlcpy(cap->card, "R_Car_VIN", sizeof(cap->card));
1347         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1348         return 0;
1349 }
1350
1351 static int rcar_vin_init_videobuf2(struct vb2_queue *vq,
1352                                    struct soc_camera_device *icd)
1353 {
1354         vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1355         vq->io_modes = VB2_MMAP | VB2_USERPTR;
1356         vq->drv_priv = icd;
1357         vq->ops = &rcar_vin_vb2_ops;
1358         vq->mem_ops = &vb2_dma_contig_memops;
1359         vq->buf_struct_size = sizeof(struct rcar_vin_buffer);
1360         vq->timestamp_type  = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1361
1362         return vb2_queue_init(vq);
1363 }
1364
1365 static struct soc_camera_host_ops rcar_vin_host_ops = {
1366         .owner          = THIS_MODULE,
1367         .add            = rcar_vin_add_device,
1368         .remove         = rcar_vin_remove_device,
1369         .clock_start    = rcar_vin_clock_start,
1370         .clock_stop     = rcar_vin_clock_stop,
1371         .get_formats    = rcar_vin_get_formats,
1372         .put_formats    = rcar_vin_put_formats,
1373         .get_crop       = rcar_vin_get_crop,
1374         .set_crop       = rcar_vin_set_crop,
1375         .try_fmt        = rcar_vin_try_fmt,
1376         .set_fmt        = rcar_vin_set_fmt,
1377         .poll           = rcar_vin_poll,
1378         .querycap       = rcar_vin_querycap,
1379         .set_bus_param  = rcar_vin_set_bus_param,
1380         .init_videobuf2 = rcar_vin_init_videobuf2,
1381 };
1382
1383 static struct platform_device_id rcar_vin_id_table[] = {
1384         { "r8a7779-vin",  RCAR_H1 },
1385         { "r8a7778-vin",  RCAR_M1 },
1386         { "uPD35004-vin", RCAR_E1 },
1387         {},
1388 };
1389 MODULE_DEVICE_TABLE(platform, rcar_vin_id_table);
1390
1391 static int rcar_vin_probe(struct platform_device *pdev)
1392 {
1393         struct rcar_vin_priv *priv;
1394         struct resource *mem;
1395         struct rcar_vin_platform_data *pdata;
1396         int irq, ret;
1397
1398         pdata = pdev->dev.platform_data;
1399         if (!pdata || !pdata->flags) {
1400                 dev_err(&pdev->dev, "platform data not set\n");
1401                 return -EINVAL;
1402         }
1403
1404         mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1405         if (mem == NULL)
1406                 return -EINVAL;
1407
1408         irq = platform_get_irq(pdev, 0);
1409         if (irq <= 0)
1410                 return -EINVAL;
1411
1412         priv = devm_kzalloc(&pdev->dev, sizeof(struct rcar_vin_priv),
1413                             GFP_KERNEL);
1414         if (!priv)
1415                 return -ENOMEM;
1416
1417         priv->base = devm_ioremap_resource(&pdev->dev, mem);
1418         if (IS_ERR(priv->base))
1419                 return PTR_ERR(priv->base);
1420
1421         ret = devm_request_irq(&pdev->dev, irq, rcar_vin_irq, IRQF_SHARED,
1422                                dev_name(&pdev->dev), priv);
1423         if (ret)
1424                 return ret;
1425
1426         priv->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
1427         if (IS_ERR(priv->alloc_ctx))
1428                 return PTR_ERR(priv->alloc_ctx);
1429
1430         priv->ici.priv = priv;
1431         priv->ici.v4l2_dev.dev = &pdev->dev;
1432         priv->ici.nr = pdev->id;
1433         priv->ici.drv_name = dev_name(&pdev->dev);
1434         priv->ici.ops = &rcar_vin_host_ops;
1435
1436         priv->pdata = pdata;
1437         priv->chip = pdev->id_entry->driver_data;
1438         spin_lock_init(&priv->lock);
1439         INIT_LIST_HEAD(&priv->capture);
1440
1441         priv->state = STOPPED;
1442
1443         pm_suspend_ignore_children(&pdev->dev, true);
1444         pm_runtime_enable(&pdev->dev);
1445
1446         ret = soc_camera_host_register(&priv->ici);
1447         if (ret)
1448                 goto cleanup;
1449
1450         return 0;
1451
1452 cleanup:
1453         pm_runtime_disable(&pdev->dev);
1454         vb2_dma_contig_cleanup_ctx(priv->alloc_ctx);
1455
1456         return ret;
1457 }
1458
1459 static int rcar_vin_remove(struct platform_device *pdev)
1460 {
1461         struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
1462         struct rcar_vin_priv *priv = container_of(soc_host,
1463                                                   struct rcar_vin_priv, ici);
1464
1465         soc_camera_host_unregister(soc_host);
1466         pm_runtime_disable(&pdev->dev);
1467         vb2_dma_contig_cleanup_ctx(priv->alloc_ctx);
1468
1469         return 0;
1470 }
1471
1472 static struct platform_driver rcar_vin_driver = {
1473         .probe          = rcar_vin_probe,
1474         .remove         = rcar_vin_remove,
1475         .driver         = {
1476                 .name           = DRV_NAME,
1477                 .owner          = THIS_MODULE,
1478         },
1479         .id_table       = rcar_vin_id_table,
1480 };
1481
1482 module_platform_driver(rcar_vin_driver);
1483
1484 MODULE_LICENSE("GPL");
1485 MODULE_ALIAS("platform:rcar_vin");
1486 MODULE_DESCRIPTION("Renesas R-Car VIN camera host driver");