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_H2,
 109         RCAR_H1,
 110         RCAR_M1,
 111         RCAR_E1,
 112 };
 113
 114 enum rcar_vin_state {
 115         STOPPED = 0,
 116         RUNNING,
 117         STOPPING,
 118 };
 119
 120 struct rcar_vin_priv {
 121         void __iomem                    *base;
 122         spinlock_t                      lock;
 123         int                             sequence;
 124         /* State of the VIN module in capturing mode */
 125         enum rcar_vin_state             state;
 126         struct rcar_vin_platform_data   *pdata;
 127         struct soc_camera_host          ici;
 128         struct list_head                capture;
 129 #define MAX_BUFFER_NUM                  3
 130         struct vb2_buffer               *queue_buf[MAX_BUFFER_NUM];
 131         struct vb2_alloc_ctx            *alloc_ctx;
 132         enum v4l2_field                 field;
 133         unsigned int                    vb_count;
 134         unsigned int                    nr_hw_slots;
 135         bool                            request_to_stop;
 136         struct completion               capture_stop;
 137         enum chip_id                    chip;
 138 };
 139
 140 #define is_continuous_transfer(priv)    (priv->vb_count > MAX_BUFFER_NUM)
 141
 142 struct rcar_vin_buffer {
 143         struct vb2_buffer               vb;
 144         struct list_head                list;
 145 };
 146
 147 #define to_buf_list(vb2_buffer) (&container_of(vb2_buffer, \
 148                                                        struct rcar_vin_buffer, \
 149                                                        vb)->list)
 150
 151 struct rcar_vin_cam {
 152         /* VIN offsets within the camera output, before the VIN scaler */
 153         unsigned int                    vin_left;
 154         unsigned int                    vin_top;
 155         /* Client output, as seen by the VIN */
 156         unsigned int                    width;
 157         unsigned int                    height;
 158         /*
 159          * User window from S_CROP / G_CROP, produced by client cropping and
 160          * scaling, VIN scaling and VIN cropping, mapped back onto the client
 161          * input window
 162          */
 163         struct v4l2_rect                subrect;
 164         /* Camera cropping rectangle */
 165         struct v4l2_rect                rect;
 166         const struct soc_mbus_pixelfmt  *extra_fmt;
 167 };
 168
 169 /*
 170  * .queue_setup() is called to check whether the driver can accept the requested
 171  * number of buffers and to fill in plane sizes for the current frame format if
 172  * required
 173  */
 174 static int rcar_vin_videobuf_setup(struct vb2_queue *vq,
 175                                    const struct v4l2_format *fmt,
 176                                    unsigned int *count,
 177                                    unsigned int *num_planes,
 178                                    unsigned int sizes[], void *alloc_ctxs[])
 179 {
 180         struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
 181         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 182         struct rcar_vin_priv *priv = ici->priv;
 183
 184         if (fmt) {
 185                 const struct soc_camera_format_xlate *xlate;
 186                 unsigned int bytes_per_line;
 187                 int ret;
 188
 189                 xlate = soc_camera_xlate_by_fourcc(icd,
 190                                                    fmt->fmt.pix.pixelformat);
 191                 if (!xlate)
 192                         return -EINVAL;
 193                 ret = soc_mbus_bytes_per_line(fmt->fmt.pix.width,
 194                                               xlate->host_fmt);
 195                 if (ret < 0)
 196                         return ret;
 197
 198                 bytes_per_line = max_t(u32, fmt->fmt.pix.bytesperline, ret);
 199
 200                 ret = soc_mbus_image_size(xlate->host_fmt, bytes_per_line,
 201                                           fmt->fmt.pix.height);
 202                 if (ret < 0)
 203                         return ret;
 204
 205                 sizes[0] = max_t(u32, fmt->fmt.pix.sizeimage, ret);
 206         } else {
 207                 /* Called from VIDIOC_REQBUFS or in compatibility mode */
 208                 sizes[0] = icd->sizeimage;
 209         }
 210
 211         alloc_ctxs[0] = priv->alloc_ctx;
 212
 213         if (!vq->num_buffers)
 214                 priv->sequence = 0;
 215
 216         if (!*count)
 217                 *count = 2;
 218         priv->vb_count = *count;
 219
 220         *num_planes = 1;
 221
 222         /* Number of hardware slots */
 223         if (is_continuous_transfer(priv))
 224                 priv->nr_hw_slots = MAX_BUFFER_NUM;
 225         else
 226                 priv->nr_hw_slots = 1;
 227
 228         dev_dbg(icd->parent, "count=%d, size=%u\n", *count, sizes[0]);
 229
 230         return 0;
 231 }
 232
 233 static int rcar_vin_setup(struct rcar_vin_priv *priv)
 234 {
 235         struct soc_camera_device *icd = priv->ici.icd;
 236         struct rcar_vin_cam *cam = icd->host_priv;
 237         u32 vnmc, dmr, interrupts;
 238         bool progressive = false, output_is_yuv = false;
 239
 240         switch (priv->field) {
 241         case V4L2_FIELD_TOP:
 242                 vnmc = VNMC_IM_ODD;
 243                 break;
 244         case V4L2_FIELD_BOTTOM:
 245                 vnmc = VNMC_IM_EVEN;
 246                 break;
 247         case V4L2_FIELD_INTERLACED:
 248         case V4L2_FIELD_INTERLACED_TB:
 249                 vnmc = VNMC_IM_FULL;
 250                 break;
 251         case V4L2_FIELD_INTERLACED_BT:
 252                 vnmc = VNMC_IM_FULL | VNMC_FOC;
 253                 break;
 254         case V4L2_FIELD_NONE:
 255                 if (is_continuous_transfer(priv)) {
 256                         vnmc = VNMC_IM_ODD_EVEN;
 257                         progressive = true;
 258                 } else {
 259                         vnmc = VNMC_IM_ODD;
 260                 }
 261                 break;
 262         default:
 263                 vnmc = VNMC_IM_ODD;
 264                 break;
 265         }
 266
 267         /* input interface */
 268         switch (icd->current_fmt->code) {
 269         case V4L2_MBUS_FMT_YUYV8_1X16:
 270                 /* BT.601/BT.1358 16bit YCbCr422 */
 271                 vnmc |= VNMC_INF_YUV16;
 272                 break;
 273         case V4L2_MBUS_FMT_YUYV8_2X8:
 274                 /* BT.656 8bit YCbCr422 or BT.601 8bit YCbCr422 */
 275                 vnmc |= priv->pdata->flags & RCAR_VIN_BT656 ?
 276                         VNMC_INF_YUV8_BT656 : VNMC_INF_YUV8_BT601;
 277         default:
 278                 break;
 279         }
 280
 281         /* output format */
 282         switch (icd->current_fmt->host_fmt->fourcc) {
 283         case V4L2_PIX_FMT_NV16:
 284                 iowrite32(ALIGN(cam->width * cam->height, 0x80),
 285                           priv->base + VNUVAOF_REG);
 286                 dmr = VNDMR_DTMD_YCSEP;
 287                 output_is_yuv = true;
 288                 break;
 289         case V4L2_PIX_FMT_YUYV:
 290                 dmr = VNDMR_BPSM;
 291                 output_is_yuv = true;
 292                 break;
 293         case V4L2_PIX_FMT_UYVY:
 294                 dmr = 0;
 295                 output_is_yuv = true;
 296                 break;
 297         case V4L2_PIX_FMT_RGB555X:
 298                 dmr = VNDMR_DTMD_ARGB1555;
 299                 break;
 300         case V4L2_PIX_FMT_RGB565:
 301                 dmr = 0;
 302                 break;
 303         case V4L2_PIX_FMT_RGB32:
 304                 if (priv->chip == RCAR_H2 || priv->chip == RCAR_H1 ||
 305                     priv->chip == RCAR_E1) {
 306                         dmr = VNDMR_EXRGB;
 307                         break;
 308                 }
 309         default:
 310                 dev_warn(icd->parent, "Invalid fourcc format (0x%x)\n",
 311                          icd->current_fmt->host_fmt->fourcc);
 312                 return -EINVAL;
 313         }
 314
 315         /* Always update on field change */
 316         vnmc |= VNMC_VUP;
 317
 318         /* If input and output use the same colorspace, use bypass mode */
 319         if (output_is_yuv)
 320                 vnmc |= VNMC_BPS;
 321
 322         /* progressive or interlaced mode */
 323         interrupts = progressive ? VNIE_FIE | VNIE_EFE : VNIE_EFE;
 324
 325         /* ack interrupts */
 326         iowrite32(interrupts, priv->base + VNINTS_REG);
 327         /* enable interrupts */
 328         iowrite32(interrupts, priv->base + VNIE_REG);
 329         /* start capturing */
 330         iowrite32(dmr, priv->base + VNDMR_REG);
 331         iowrite32(vnmc | VNMC_ME, priv->base + VNMC_REG);
 332
 333         return 0;
 334 }
 335
 336 static void rcar_vin_capture(struct rcar_vin_priv *priv)
 337 {
 338         if (is_continuous_transfer(priv))
 339                 /* Continuous Frame Capture Mode */
 340                 iowrite32(VNFC_C_FRAME, priv->base + VNFC_REG);
 341         else
 342                 /* Single Frame Capture Mode */
 343                 iowrite32(VNFC_S_FRAME, priv->base + VNFC_REG);
 344 }
 345
 346 static void rcar_vin_request_capture_stop(struct rcar_vin_priv *priv)
 347 {
 348         priv->state = STOPPING;
 349
 350         /* set continuous & single transfer off */
 351         iowrite32(0, priv->base + VNFC_REG);
 352         /* disable capture (release DMA buffer), reset */
 353         iowrite32(ioread32(priv->base + VNMC_REG) & ~VNMC_ME,
 354                   priv->base + VNMC_REG);
 355
 356         /* update the status if stopped already */
 357         if (!(ioread32(priv->base + VNMS_REG) & VNMS_CA))
 358                 priv->state = STOPPED;
 359 }
 360
 361 static int rcar_vin_get_free_hw_slot(struct rcar_vin_priv *priv)
 362 {
 363         int slot;
 364
 365         for (slot = 0; slot < priv->nr_hw_slots; slot++)
 366                 if (priv->queue_buf[slot] == NULL)
 367                         return slot;
 368
 369         return -1;
 370 }
 371
 372 static int rcar_vin_hw_ready(struct rcar_vin_priv *priv)
 373 {
 374         /* Ensure all HW slots are filled */
 375         return rcar_vin_get_free_hw_slot(priv) < 0 ? 1 : 0;
 376 }
 377
 378 /* Moves a buffer from the queue to the HW slots */
 379 static int rcar_vin_fill_hw_slot(struct rcar_vin_priv *priv)
 380 {
 381         struct vb2_buffer *vb;
 382         dma_addr_t phys_addr_top;
 383         int slot;
 384
 385         if (list_empty(&priv->capture))
 386                 return 0;
 387
 388         /* Find a free HW slot */
 389         slot = rcar_vin_get_free_hw_slot(priv);
 390         if (slot < 0)
 391                 return 0;
 392
 393         vb = &list_entry(priv->capture.next, struct rcar_vin_buffer, list)->vb;
 394         list_del_init(to_buf_list(vb));
 395         priv->queue_buf[slot] = vb;
 396         phys_addr_top = vb2_dma_contig_plane_dma_addr(vb, 0);
 397         iowrite32(phys_addr_top, priv->base + VNMB_REG(slot));
 398
 399         return 1;
 400 }
 401
 402 static void rcar_vin_videobuf_queue(struct vb2_buffer *vb)
 403 {
 404         struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
 405         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 406         struct rcar_vin_priv *priv = ici->priv;
 407         unsigned long size;
 408
 409         size = icd->sizeimage;
 410
 411         if (vb2_plane_size(vb, 0) < size) {
 412                 dev_err(icd->parent, "Buffer #%d too small (%lu < %lu)\n",
 413                         vb->v4l2_buf.index, vb2_plane_size(vb, 0), size);
 414                 goto error;
 415         }
 416
 417         vb2_set_plane_payload(vb, 0, size);
 418
 419         dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
 420                 vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
 421
 422         spin_lock_irq(&priv->lock);
 423
 424         list_add_tail(to_buf_list(vb), &priv->capture);
 425         rcar_vin_fill_hw_slot(priv);
 426
 427         /* If we weren't running, and have enough buffers, start capturing! */
 428         if (priv->state != RUNNING && rcar_vin_hw_ready(priv)) {
 429                 if (rcar_vin_setup(priv)) {
 430                         /* Submit error */
 431                         list_del_init(to_buf_list(vb));
 432                         spin_unlock_irq(&priv->lock);
 433                         goto error;
 434                 }
 435                 priv->request_to_stop = false;
 436                 init_completion(&priv->capture_stop);
 437                 priv->state = RUNNING;
 438                 rcar_vin_capture(priv);
 439         }
 440
 441         spin_unlock_irq(&priv->lock);
 442
 443         return;
 444
 445 error:
 446         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
 447 }
 448
 449 static void rcar_vin_videobuf_release(struct vb2_buffer *vb)
 450 {
 451         struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
 452         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 453         struct rcar_vin_priv *priv = ici->priv;
 454         unsigned int i;
 455         int buf_in_use = 0;
 456
 457         spin_lock_irq(&priv->lock);
 458
 459         /* Is the buffer in use by the VIN hardware? */
 460         for (i = 0; i < MAX_BUFFER_NUM; i++) {
 461                 if (priv->queue_buf[i] == vb) {
 462                         buf_in_use = 1;
 463                         break;
 464                 }
 465         }
 466
 467         if (buf_in_use) {
 468                 while (priv->state != STOPPED) {
 469
 470                         /* issue stop if running */
 471                         if (priv->state == RUNNING)
 472                                 rcar_vin_request_capture_stop(priv);
 473
 474                         /* wait until capturing has been stopped */
 475                         if (priv->state == STOPPING) {
 476                                 priv->request_to_stop = true;
 477                                 spin_unlock_irq(&priv->lock);
 478                                 wait_for_completion(&priv->capture_stop);
 479                                 spin_lock_irq(&priv->lock);
 480                         }
 481                 }
 482                 /*
 483                  * Capturing has now stopped. The buffer we have been asked
 484                  * to release could be any of the current buffers in use, so
 485                  * release all buffers that are in use by HW
 486                  */
 487                 for (i = 0; i < MAX_BUFFER_NUM; i++) {
 488                         if (priv->queue_buf[i]) {
 489                                 vb2_buffer_done(priv->queue_buf[i],
 490                                         VB2_BUF_STATE_ERROR);
 491                                 priv->queue_buf[i] = NULL;
 492                         }
 493                 }
 494         } else {
 495                 list_del_init(to_buf_list(vb));
 496         }
 497
 498         spin_unlock_irq(&priv->lock);
 499 }
 500
 501 static int rcar_vin_videobuf_init(struct vb2_buffer *vb)
 502 {
 503         INIT_LIST_HEAD(to_buf_list(vb));
 504         return 0;
 505 }
 506
 507 static int rcar_vin_stop_streaming(struct vb2_queue *vq)
 508 {
 509         struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
 510         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 511         struct rcar_vin_priv *priv = ici->priv;
 512         struct list_head *buf_head, *tmp;
 513
 514         spin_lock_irq(&priv->lock);
 515         list_for_each_safe(buf_head, tmp, &priv->capture)
 516                 list_del_init(buf_head);
 517         spin_unlock_irq(&priv->lock);
 518
 519         return 0;
 520 }
 521
 522 static struct vb2_ops rcar_vin_vb2_ops = {
 523         .queue_setup    = rcar_vin_videobuf_setup,
 524         .buf_init       = rcar_vin_videobuf_init,
 525         .buf_cleanup    = rcar_vin_videobuf_release,
 526         .buf_queue      = rcar_vin_videobuf_queue,
 527         .stop_streaming = rcar_vin_stop_streaming,
 528         .wait_prepare   = soc_camera_unlock,
 529         .wait_finish    = soc_camera_lock,
 530 };
 531
 532 static irqreturn_t rcar_vin_irq(int irq, void *data)
 533 {
 534         struct rcar_vin_priv *priv = data;
 535         u32 int_status;
 536         bool can_run = false, hw_stopped;
 537         int slot;
 538         unsigned int handled = 0;
 539
 540         spin_lock(&priv->lock);
 541
 542         int_status = ioread32(priv->base + VNINTS_REG);
 543         if (!int_status)
 544                 goto done;
 545         /* ack interrupts */
 546         iowrite32(int_status, priv->base + VNINTS_REG);
 547         handled = 1;
 548
 549         /* nothing to do if capture status is 'STOPPED' */
 550         if (priv->state == STOPPED)
 551                 goto done;
 552
 553         hw_stopped = !(ioread32(priv->base + VNMS_REG) & VNMS_CA);
 554
 555         if (!priv->request_to_stop) {
 556                 if (is_continuous_transfer(priv))
 557                         slot = (ioread32(priv->base + VNMS_REG) &
 558                                 VNMS_FBS_MASK) >> VNMS_FBS_SHIFT;
 559                 else
 560                         slot = 0;
 561
 562                 priv->queue_buf[slot]->v4l2_buf.field = priv->field;
 563                 priv->queue_buf[slot]->v4l2_buf.sequence = priv->sequence++;
 564                 do_gettimeofday(&priv->queue_buf[slot]->v4l2_buf.timestamp);
 565                 vb2_buffer_done(priv->queue_buf[slot], VB2_BUF_STATE_DONE);
 566                 priv->queue_buf[slot] = NULL;
 567
 568                 if (priv->state != STOPPING)
 569                         can_run = rcar_vin_fill_hw_slot(priv);
 570
 571                 if (hw_stopped || !can_run) {
 572                         priv->state = STOPPED;
 573                 } else if (is_continuous_transfer(priv) &&
 574                            list_empty(&priv->capture) &&
 575                            priv->state == RUNNING) {
 576                         /*
 577                          * The continuous capturing requires an explicit stop
 578                          * operation when there is no buffer to be set into
 579                          * the VnMBm registers.
 580                          */
 581                         rcar_vin_request_capture_stop(priv);
 582                 } else {
 583                         rcar_vin_capture(priv);
 584                 }
 585
 586         } else if (hw_stopped) {
 587                 priv->state = STOPPED;
 588                 priv->request_to_stop = false;
 589                 complete(&priv->capture_stop);
 590         }
 591
 592 done:
 593         spin_unlock(&priv->lock);
 594
 595         return IRQ_RETVAL(handled);
 596 }
 597
 598 static int rcar_vin_add_device(struct soc_camera_device *icd)
 599 {
 600         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 601         struct rcar_vin_priv *priv = ici->priv;
 602         int i;
 603
 604         for (i = 0; i < MAX_BUFFER_NUM; i++)
 605                 priv->queue_buf[i] = NULL;
 606
 607         pm_runtime_get_sync(ici->v4l2_dev.dev);
 608
 609         dev_dbg(icd->parent, "R-Car VIN driver attached to camera %d\n",
 610                 icd->devnum);
 611
 612         return 0;
 613 }
 614
 615 static void rcar_vin_remove_device(struct soc_camera_device *icd)
 616 {
 617         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 618         struct rcar_vin_priv *priv = ici->priv;
 619         struct vb2_buffer *vb;
 620         int i;
 621
 622         /* disable capture, disable interrupts */
 623         iowrite32(ioread32(priv->base + VNMC_REG) & ~VNMC_ME,
 624                   priv->base + VNMC_REG);
 625         iowrite32(0, priv->base + VNIE_REG);
 626
 627         priv->state = STOPPED;
 628         priv->request_to_stop = false;
 629
 630         /* make sure active buffer is cancelled */
 631         spin_lock_irq(&priv->lock);
 632         for (i = 0; i < MAX_BUFFER_NUM; i++) {
 633                 vb = priv->queue_buf[i];
 634                 if (vb) {
 635                         list_del_init(to_buf_list(vb));
 636                         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
 637                 }
 638         }
 639         spin_unlock_irq(&priv->lock);
 640
 641         pm_runtime_put(ici->v4l2_dev.dev);
 642
 643         dev_dbg(icd->parent, "R-Car VIN driver detached from camera %d\n",
 644                 icd->devnum);
 645 }
 646
 647 /* Called with .host_lock held */
 648 static int rcar_vin_clock_start(struct soc_camera_host *ici)
 649 {
 650         /* VIN does not have "mclk" */
 651         return 0;
 652 }
 653
 654 /* Called with .host_lock held */
 655 static void rcar_vin_clock_stop(struct soc_camera_host *ici)
 656 {
 657         /* VIN does not have "mclk" */
 658 }
 659
 660 /* rect is guaranteed to not exceed the scaled camera rectangle */
 661 static int rcar_vin_set_rect(struct soc_camera_device *icd)
 662 {
 663         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 664         struct rcar_vin_cam *cam = icd->host_priv;
 665         struct rcar_vin_priv *priv = ici->priv;
 666         unsigned int left_offset, top_offset;
 667         unsigned char dsize = 0;
 668         struct v4l2_rect *cam_subrect = &cam->subrect;
 669
 670         dev_dbg(icd->parent, "Crop %ux%u@%u:%u\n",
 671                 icd->user_width, icd->user_height, cam->vin_left, cam->vin_top);
 672
 673         left_offset = cam->vin_left;
 674         top_offset = cam->vin_top;
 675
 676         if (icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_RGB32 &&
 677             priv->chip == RCAR_E1)
 678                 dsize = 1;
 679
 680         dev_dbg(icd->parent, "Cam %ux%u@%u:%u\n",
 681                 cam->width, cam->height, cam->vin_left, cam->vin_top);
 682         dev_dbg(icd->parent, "Cam subrect %ux%u@%u:%u\n",
 683                 cam_subrect->width, cam_subrect->height,
 684                 cam_subrect->left, cam_subrect->top);
 685
 686         /* Set Start/End Pixel/Line Pre-Clip */
 687         iowrite32(left_offset << dsize, priv->base + VNSPPRC_REG);
 688         iowrite32((left_offset + cam->width - 1) << dsize,
 689                   priv->base + VNEPPRC_REG);
 690         switch (priv->field) {
 691         case V4L2_FIELD_INTERLACED:
 692         case V4L2_FIELD_INTERLACED_TB:
 693         case V4L2_FIELD_INTERLACED_BT:
 694                 iowrite32(top_offset / 2, priv->base + VNSLPRC_REG);
 695                 iowrite32((top_offset + cam->height) / 2 - 1,
 696                           priv->base + VNELPRC_REG);
 697                 break;
 698         default:
 699                 iowrite32(top_offset, priv->base + VNSLPRC_REG);
 700                 iowrite32(top_offset + cam->height - 1,
 701                           priv->base + VNELPRC_REG);
 702                 break;
 703         }
 704
 705         /* Set Start/End Pixel/Line Post-Clip */
 706         iowrite32(0, priv->base + VNSPPOC_REG);
 707         iowrite32(0, priv->base + VNSLPOC_REG);
 708         iowrite32((cam_subrect->width - 1) << dsize, priv->base + VNEPPOC_REG);
 709         switch (priv->field) {
 710         case V4L2_FIELD_INTERLACED:
 711         case V4L2_FIELD_INTERLACED_TB:
 712         case V4L2_FIELD_INTERLACED_BT:
 713                 iowrite32(cam_subrect->height / 2 - 1,
 714                           priv->base + VNELPOC_REG);
 715                 break;
 716         default:
 717                 iowrite32(cam_subrect->height - 1, priv->base + VNELPOC_REG);
 718                 break;
 719         }
 720
 721         iowrite32(ALIGN(cam->width, 0x10), priv->base + VNIS_REG);
 722
 723         return 0;
 724 }
 725
 726 static void capture_stop_preserve(struct rcar_vin_priv *priv, u32 *vnmc)
 727 {
 728         *vnmc = ioread32(priv->base + VNMC_REG);
 729         /* module disable */
 730         iowrite32(*vnmc & ~VNMC_ME, priv->base + VNMC_REG);
 731 }
 732
 733 static void capture_restore(struct rcar_vin_priv *priv, u32 vnmc)
 734 {
 735         unsigned long timeout = jiffies + 10 * HZ;
 736
 737         /*
 738          * Wait until the end of the current frame. It can take a long time,
 739          * but if it has been aborted by a MRST1 reset, it should exit sooner.
 740          */
 741         while ((ioread32(priv->base + VNMS_REG) & VNMS_AV) &&
 742                 time_before(jiffies, timeout))
 743                 msleep(1);
 744
 745         if (time_after(jiffies, timeout)) {
 746                 dev_err(priv->ici.v4l2_dev.dev,
 747                         "Timeout waiting for frame end! Interface problem?\n");
 748                 return;
 749         }
 750
 751         iowrite32(vnmc, priv->base + VNMC_REG);
 752 }
 753
 754 #define VIN_MBUS_FLAGS  (V4L2_MBUS_MASTER |             \
 755                          V4L2_MBUS_PCLK_SAMPLE_RISING | \
 756                          V4L2_MBUS_HSYNC_ACTIVE_HIGH |  \
 757                          V4L2_MBUS_HSYNC_ACTIVE_LOW |   \
 758                          V4L2_MBUS_VSYNC_ACTIVE_HIGH |  \
 759                          V4L2_MBUS_VSYNC_ACTIVE_LOW |   \
 760                          V4L2_MBUS_DATA_ACTIVE_HIGH)
 761
 762 static int rcar_vin_set_bus_param(struct soc_camera_device *icd)
 763 {
 764         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 765         struct rcar_vin_priv *priv = ici->priv;
 766         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
 767         struct v4l2_mbus_config cfg;
 768         unsigned long common_flags;
 769         u32 vnmc;
 770         u32 val;
 771         int ret;
 772
 773         capture_stop_preserve(priv, &vnmc);
 774
 775         ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
 776         if (!ret) {
 777                 common_flags = soc_mbus_config_compatible(&cfg, VIN_MBUS_FLAGS);
 778                 if (!common_flags) {
 779                         dev_warn(icd->parent,
 780                                  "MBUS flags incompatible: camera 0x%x, host 0x%x\n",
 781                                  cfg.flags, VIN_MBUS_FLAGS);
 782                         return -EINVAL;
 783                 }
 784         } else if (ret != -ENOIOCTLCMD) {
 785                 return ret;
 786         } else {
 787                 common_flags = VIN_MBUS_FLAGS;
 788         }
 789
 790         /* Make choises, based on platform preferences */
 791         if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
 792             (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
 793                 if (priv->pdata->flags & RCAR_VIN_HSYNC_ACTIVE_LOW)
 794                         common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH;
 795                 else
 796                         common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW;
 797         }
 798
 799         if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) &&
 800             (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) {
 801                 if (priv->pdata->flags & RCAR_VIN_VSYNC_ACTIVE_LOW)
 802                         common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH;
 803                 else
 804                         common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW;
 805         }
 806
 807         cfg.flags = common_flags;
 808         ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg);
 809         if (ret < 0 && ret != -ENOIOCTLCMD)
 810                 return ret;
 811
 812         val = priv->field == V4L2_FIELD_NONE ? VNDMR2_FTEV : 0;
 813         if (!(common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW))
 814                 val |= VNDMR2_VPS;
 815         if (!(common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW))
 816                 val |= VNDMR2_HPS;
 817         iowrite32(val, priv->base + VNDMR2_REG);
 818
 819         ret = rcar_vin_set_rect(icd);
 820         if (ret < 0)
 821                 return ret;
 822
 823         capture_restore(priv, vnmc);
 824
 825         return 0;
 826 }
 827
 828 static int rcar_vin_try_bus_param(struct soc_camera_device *icd,
 829                                   unsigned char buswidth)
 830 {
 831         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
 832         struct v4l2_mbus_config cfg;
 833         int ret;
 834
 835         ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
 836         if (ret == -ENOIOCTLCMD)
 837                 return 0;
 838         else if (ret)
 839                 return ret;
 840
 841         if (buswidth > 24)
 842                 return -EINVAL;
 843
 844         /* check is there common mbus flags */
 845         ret = soc_mbus_config_compatible(&cfg, VIN_MBUS_FLAGS);
 846         if (ret)
 847                 return 0;
 848
 849         dev_warn(icd->parent,
 850                 "MBUS flags incompatible: camera 0x%x, host 0x%x\n",
 851                  cfg.flags, VIN_MBUS_FLAGS);
 852
 853         return -EINVAL;
 854 }
 855
 856 static bool rcar_vin_packing_supported(const struct soc_mbus_pixelfmt *fmt)
 857 {
 858         return  fmt->packing == SOC_MBUS_PACKING_NONE ||
 859                 (fmt->bits_per_sample > 8 &&
 860                  fmt->packing == SOC_MBUS_PACKING_EXTEND16);
 861 }
 862
 863 static const struct soc_mbus_pixelfmt rcar_vin_formats[] = {
 864         {
 865                 .fourcc                 = V4L2_PIX_FMT_NV16,
 866                 .name                   = "NV16",
 867                 .bits_per_sample        = 8,
 868                 .packing                = SOC_MBUS_PACKING_2X8_PADHI,
 869                 .order                  = SOC_MBUS_ORDER_LE,
 870                 .layout                 = SOC_MBUS_LAYOUT_PLANAR_Y_C,
 871         },
 872         {
 873                 .fourcc                 = V4L2_PIX_FMT_UYVY,
 874                 .name                   = "UYVY",
 875                 .bits_per_sample        = 16,
 876                 .packing                = SOC_MBUS_PACKING_NONE,
 877                 .order                  = SOC_MBUS_ORDER_LE,
 878                 .layout                 = SOC_MBUS_LAYOUT_PACKED,
 879         },
 880         {
 881                 .fourcc                 = V4L2_PIX_FMT_RGB565,
 882                 .name                   = "RGB565",
 883                 .bits_per_sample        = 16,
 884                 .packing                = SOC_MBUS_PACKING_NONE,
 885                 .order                  = SOC_MBUS_ORDER_LE,
 886                 .layout                 = SOC_MBUS_LAYOUT_PACKED,
 887         },
 888         {
 889                 .fourcc                 = V4L2_PIX_FMT_RGB555X,
 890                 .name                   = "ARGB1555",
 891                 .bits_per_sample        = 16,
 892                 .packing                = SOC_MBUS_PACKING_NONE,
 893                 .order                  = SOC_MBUS_ORDER_LE,
 894                 .layout                 = SOC_MBUS_LAYOUT_PACKED,
 895         },
 896         {
 897                 .fourcc                 = V4L2_PIX_FMT_RGB32,
 898                 .name                   = "RGB888",
 899                 .bits_per_sample        = 32,
 900                 .packing                = SOC_MBUS_PACKING_NONE,
 901                 .order                  = SOC_MBUS_ORDER_LE,
 902                 .layout                 = SOC_MBUS_LAYOUT_PACKED,
 903         },
 904 };
 905
 906 static int rcar_vin_get_formats(struct soc_camera_device *icd, unsigned int idx,
 907                                 struct soc_camera_format_xlate *xlate)
 908 {
 909         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
 910         struct device *dev = icd->parent;
 911         int ret, k, n;
 912         int formats = 0;
 913         struct rcar_vin_cam *cam;
 914         enum v4l2_mbus_pixelcode code;
 915         const struct soc_mbus_pixelfmt *fmt;
 916
 917         ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code);
 918         if (ret < 0)
 919                 return 0;
 920
 921         fmt = soc_mbus_get_fmtdesc(code);
 922         if (!fmt) {
 923                 dev_warn(dev, "unsupported format code #%u: %d\n", idx, code);
 924                 return 0;
 925         }
 926
 927         ret = rcar_vin_try_bus_param(icd, fmt->bits_per_sample);
 928         if (ret < 0)
 929                 return 0;
 930
 931         if (!icd->host_priv) {
 932                 struct v4l2_mbus_framefmt mf;
 933                 struct v4l2_rect rect;
 934                 struct device *dev = icd->parent;
 935                 int shift;
 936
 937                 ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
 938                 if (ret < 0)
 939                         return ret;
 940
 941                 /* Cache current client geometry */
 942                 ret = soc_camera_client_g_rect(sd, &rect);
 943                 if (ret == -ENOIOCTLCMD) {
 944                         /* Sensor driver doesn't support cropping */
 945                         rect.left = 0;
 946                         rect.top = 0;
 947                         rect.width = mf.width;
 948                         rect.height = mf.height;
 949                 } else if (ret < 0) {
 950                         return ret;
 951                 }
 952
 953                 /*
 954                  * If sensor proposes too large format then try smaller ones:
 955                  * 1280x960, 640x480, 320x240
 956                  */
 957                 for (shift = 0; shift < 3; shift++) {
 958                         if (mf.width <= VIN_MAX_WIDTH &&
 959                             mf.height <= VIN_MAX_HEIGHT)
 960                                 break;
 961
 962                         mf.width = 1280 >> shift;
 963                         mf.height = 960 >> shift;
 964                         ret = v4l2_device_call_until_err(sd->v4l2_dev,
 965                                                          soc_camera_grp_id(icd),
 966                                                          video, s_mbus_fmt,
 967                                                          &mf);
 968                         if (ret < 0)
 969                                 return ret;
 970                 }
 971
 972                 if (shift == 3) {
 973                         dev_err(dev,
 974                                 "Failed to configure the client below %ux%x\n",
 975                                 mf.width, mf.height);
 976                         return -EIO;
 977                 }
 978
 979                 dev_dbg(dev, "camera fmt %ux%u\n", mf.width, mf.height);
 980
 981                 cam = kzalloc(sizeof(*cam), GFP_KERNEL);
 982                 if (!cam)
 983                         return -ENOMEM;
 984                 /*
 985                  * We are called with current camera crop,
 986                  * initialise subrect with it
 987                  */
 988                 cam->rect = rect;
 989                 cam->subrect = rect;
 990                 cam->width = mf.width;
 991                 cam->height = mf.height;
 992
 993                 icd->host_priv = cam;
 994         } else {
 995                 cam = icd->host_priv;
 996         }
 997
 998         /* Beginning of a pass */
 999         if (!idx)
1000                 cam->extra_fmt = NULL;
1001
1002         switch (code) {
1003         case V4L2_MBUS_FMT_YUYV8_1X16:
1004         case V4L2_MBUS_FMT_YUYV8_2X8:
1005                 if (cam->extra_fmt)
1006                         break;
1007
1008                 /* Add all our formats that can be generated by VIN */
1009                 cam->extra_fmt = rcar_vin_formats;
1010
1011                 n = ARRAY_SIZE(rcar_vin_formats);
1012                 formats += n;
1013                 for (k = 0; xlate && k < n; k++, xlate++) {
1014                         xlate->host_fmt = &rcar_vin_formats[k];
1015                         xlate->code = code;
1016                         dev_dbg(dev, "Providing format %s using code %d\n",
1017                                 rcar_vin_formats[k].name, code);
1018                 }
1019                 break;
1020         default:
1021                 if (!rcar_vin_packing_supported(fmt))
1022                         return 0;
1023
1024                 dev_dbg(dev, "Providing format %s in pass-through mode\n",
1025                         fmt->name);
1026                 break;
1027         }
1028
1029         /* Generic pass-through */
1030         formats++;
1031         if (xlate) {
1032                 xlate->host_fmt = fmt;
1033                 xlate->code = code;
1034                 xlate++;
1035         }
1036
1037         return formats;
1038 }
1039
1040 static void rcar_vin_put_formats(struct soc_camera_device *icd)
1041 {
1042         kfree(icd->host_priv);
1043         icd->host_priv = NULL;
1044 }
1045
1046 static int rcar_vin_set_crop(struct soc_camera_device *icd,
1047                              const struct v4l2_crop *a)
1048 {
1049         struct v4l2_crop a_writable = *a;
1050         const struct v4l2_rect *rect = &a_writable.c;
1051         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1052         struct rcar_vin_priv *priv = ici->priv;
1053         struct v4l2_crop cam_crop;
1054         struct rcar_vin_cam *cam = icd->host_priv;
1055         struct v4l2_rect *cam_rect = &cam_crop.c;
1056         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1057         struct device *dev = icd->parent;
1058         struct v4l2_mbus_framefmt mf;
1059         u32 vnmc;
1060         int ret, i;
1061
1062         dev_dbg(dev, "S_CROP(%ux%u@%u:%u)\n", rect->width, rect->height,
1063                 rect->left, rect->top);
1064
1065         /* During camera cropping its output window can change too, stop VIN */
1066         capture_stop_preserve(priv, &vnmc);
1067         dev_dbg(dev, "VNMC_REG 0x%x\n", vnmc);
1068
1069         /* Apply iterative camera S_CROP for new input window. */
1070         ret = soc_camera_client_s_crop(sd, &a_writable, &cam_crop,
1071                                        &cam->rect, &cam->subrect);
1072         if (ret < 0)
1073                 return ret;
1074
1075         dev_dbg(dev, "camera cropped to %ux%u@%u:%u\n",
1076                 cam_rect->width, cam_rect->height,
1077                 cam_rect->left, cam_rect->top);
1078
1079         /* On success cam_crop contains current camera crop */
1080
1081         /* Retrieve camera output window */
1082         ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
1083         if (ret < 0)
1084                 return ret;
1085
1086         if (mf.width > VIN_MAX_WIDTH || mf.height > VIN_MAX_HEIGHT)
1087                 return -EINVAL;
1088
1089         /* Cache camera output window */
1090         cam->width = mf.width;
1091         cam->height = mf.height;
1092
1093         icd->user_width  = cam->width;
1094         icd->user_height = cam->height;
1095
1096         cam->vin_left = rect->left & ~1;
1097         cam->vin_top = rect->top & ~1;
1098
1099         /* Use VIN cropping to crop to the new window. */
1100         ret = rcar_vin_set_rect(icd);
1101         if (ret < 0)
1102                 return ret;
1103
1104         cam->subrect = *rect;
1105
1106         dev_dbg(dev, "VIN cropped to %ux%u@%u:%u\n",
1107                 icd->user_width, icd->user_height,
1108                 cam->vin_left, cam->vin_top);
1109
1110         /* Restore capture */
1111         for (i = 0; i < MAX_BUFFER_NUM; i++) {
1112                 if (priv->queue_buf[i] && priv->state == STOPPED) {
1113                         vnmc |= VNMC_ME;
1114                         break;
1115                 }
1116         }
1117         capture_restore(priv, vnmc);
1118
1119         /* Even if only camera cropping succeeded */
1120         return ret;
1121 }
1122
1123 static int rcar_vin_get_crop(struct soc_camera_device *icd,
1124                              struct v4l2_crop *a)
1125 {
1126         struct rcar_vin_cam *cam = icd->host_priv;
1127
1128         a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1129         a->c = cam->subrect;
1130
1131         return 0;
1132 }
1133
1134 /* Similar to set_crop multistage iterative algorithm */
1135 static int rcar_vin_set_fmt(struct soc_camera_device *icd,
1136                             struct v4l2_format *f)
1137 {
1138         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1139         struct rcar_vin_priv *priv = ici->priv;
1140         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1141         struct rcar_vin_cam *cam = icd->host_priv;
1142         struct v4l2_pix_format *pix = &f->fmt.pix;
1143         struct v4l2_mbus_framefmt mf;
1144         struct device *dev = icd->parent;
1145         __u32 pixfmt = pix->pixelformat;
1146         const struct soc_camera_format_xlate *xlate;
1147         unsigned int vin_sub_width = 0, vin_sub_height = 0;
1148         int ret;
1149         bool can_scale;
1150         enum v4l2_field field;
1151         v4l2_std_id std;
1152
1153         dev_dbg(dev, "S_FMT(pix=0x%x, %ux%u)\n",
1154                 pixfmt, pix->width, pix->height);
1155
1156         switch (pix->field) {
1157         default:
1158                 pix->field = V4L2_FIELD_NONE;
1159                 /* fall-through */
1160         case V4L2_FIELD_NONE:
1161         case V4L2_FIELD_TOP:
1162         case V4L2_FIELD_BOTTOM:
1163         case V4L2_FIELD_INTERLACED_TB:
1164         case V4L2_FIELD_INTERLACED_BT:
1165                 field = pix->field;
1166                 break;
1167         case V4L2_FIELD_INTERLACED:
1168                 /* Query for standard if not explicitly mentioned _TB/_BT */
1169                 ret = v4l2_subdev_call(sd, video, querystd, &std);
1170                 if (ret < 0)
1171                         std = V4L2_STD_625_50;
1172
1173                 field = std & V4L2_STD_625_50 ? V4L2_FIELD_INTERLACED_TB :
1174                                                 V4L2_FIELD_INTERLACED_BT;
1175                 break;
1176         }
1177
1178         xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1179         if (!xlate) {
1180                 dev_warn(dev, "Format %x not found\n", pixfmt);
1181                 return -EINVAL;
1182         }
1183         /* Calculate client output geometry */
1184         soc_camera_calc_client_output(icd, &cam->rect, &cam->subrect, pix, &mf,
1185                                       12);
1186         mf.field = pix->field;
1187         mf.colorspace = pix->colorspace;
1188         mf.code  = xlate->code;
1189
1190         switch (pixfmt) {
1191         case V4L2_PIX_FMT_RGB32:
1192                 can_scale = priv->chip != RCAR_E1;
1193                 break;
1194         case V4L2_PIX_FMT_UYVY:
1195         case V4L2_PIX_FMT_YUYV:
1196         case V4L2_PIX_FMT_RGB565:
1197         case V4L2_PIX_FMT_RGB555X:
1198                 can_scale = true;
1199                 break;
1200         default:
1201                 can_scale = false;
1202                 break;
1203         }
1204
1205         dev_dbg(dev, "request camera output %ux%u\n", mf.width, mf.height);
1206
1207         ret = soc_camera_client_scale(icd, &cam->rect, &cam->subrect,
1208                                       &mf, &vin_sub_width, &vin_sub_height,
1209                                       can_scale, 12);
1210
1211         /* Done with the camera. Now see if we can improve the result */
1212         dev_dbg(dev, "Camera %d fmt %ux%u, requested %ux%u\n",
1213                 ret, mf.width, mf.height, pix->width, pix->height);
1214
1215         if (ret == -ENOIOCTLCMD)
1216                 dev_dbg(dev, "Sensor doesn't support scaling\n");
1217         else if (ret < 0)
1218                 return ret;
1219
1220         if (mf.code != xlate->code)
1221                 return -EINVAL;
1222
1223         /* Prepare VIN crop */
1224         cam->width = mf.width;
1225         cam->height = mf.height;
1226
1227         /* Use VIN scaling to scale to the requested user window. */
1228
1229         /* We cannot scale up */
1230         if (pix->width > vin_sub_width)
1231                 vin_sub_width = pix->width;
1232
1233         if (pix->height > vin_sub_height)
1234                 vin_sub_height = pix->height;
1235
1236         pix->colorspace = mf.colorspace;
1237
1238         if (!can_scale) {
1239                 pix->width = vin_sub_width;
1240                 pix->height = vin_sub_height;
1241         }
1242
1243         /*
1244          * We have calculated CFLCR, the actual configuration will be performed
1245          * in rcar_vin_set_bus_param()
1246          */
1247
1248         dev_dbg(dev, "W: %u : %u, H: %u : %u\n",
1249                 vin_sub_width, pix->width, vin_sub_height, pix->height);
1250
1251         icd->current_fmt = xlate;
1252
1253         priv->field = field;
1254
1255         return 0;
1256 }
1257
1258 static int rcar_vin_try_fmt(struct soc_camera_device *icd,
1259                             struct v4l2_format *f)
1260 {
1261         const struct soc_camera_format_xlate *xlate;
1262         struct v4l2_pix_format *pix = &f->fmt.pix;
1263         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1264         struct v4l2_mbus_framefmt mf;
1265         __u32 pixfmt = pix->pixelformat;
1266         int width, height;
1267         int ret;
1268
1269         xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1270         if (!xlate) {
1271                 xlate = icd->current_fmt;
1272                 dev_dbg(icd->parent, "Format %x not found, keeping %x\n",
1273                         pixfmt, xlate->host_fmt->fourcc);
1274                 pixfmt = xlate->host_fmt->fourcc;
1275                 pix->pixelformat = pixfmt;
1276                 pix->colorspace = icd->colorspace;
1277         }
1278
1279         /* FIXME: calculate using depth and bus width */
1280         v4l_bound_align_image(&pix->width, 2, VIN_MAX_WIDTH, 1,
1281                               &pix->height, 4, VIN_MAX_HEIGHT, 2, 0);
1282
1283         width = pix->width;
1284         height = pix->height;
1285
1286         /* let soc-camera calculate these values */
1287         pix->bytesperline = 0;
1288         pix->sizeimage = 0;
1289
1290         /* limit to sensor capabilities */
1291         mf.width = pix->width;
1292         mf.height = pix->height;
1293         mf.field = pix->field;
1294         mf.code = xlate->code;
1295         mf.colorspace = pix->colorspace;
1296
1297         ret = v4l2_device_call_until_err(sd->v4l2_dev, soc_camera_grp_id(icd),
1298                                          video, try_mbus_fmt, &mf);
1299         if (ret < 0)
1300                 return ret;
1301
1302         pix->width = mf.width;
1303         pix->height = mf.height;
1304         pix->field = mf.field;
1305         pix->colorspace = mf.colorspace;
1306
1307         if (pixfmt == V4L2_PIX_FMT_NV16) {
1308                 /* FIXME: check against rect_max after converting soc-camera */
1309                 /* We can scale precisely, need a bigger image from camera */
1310                 if (pix->width < width || pix->height < height) {
1311                         /*
1312                          * We presume, the sensor behaves sanely, i.e. if
1313                          * requested a bigger rectangle, it will not return a
1314                          * smaller one.
1315                          */
1316                         mf.width = VIN_MAX_WIDTH;
1317                         mf.height = VIN_MAX_HEIGHT;
1318                         ret = v4l2_device_call_until_err(sd->v4l2_dev,
1319                                                          soc_camera_grp_id(icd),
1320                                                          video, try_mbus_fmt,
1321                                                          &mf);
1322                         if (ret < 0) {
1323                                 dev_err(icd->parent,
1324                                         "client try_fmt() = %d\n", ret);
1325                                 return ret;
1326                         }
1327                 }
1328                 /* We will scale exactly */
1329                 if (mf.width > width)
1330                         pix->width = width;
1331                 if (mf.height > height)
1332                         pix->height = height;
1333         }
1334
1335         return ret;
1336 }
1337
1338 static unsigned int rcar_vin_poll(struct file *file, poll_table *pt)
1339 {
1340         struct soc_camera_device *icd = file->private_data;
1341
1342         return vb2_poll(&icd->vb2_vidq, file, pt);
1343 }
1344
1345 static int rcar_vin_querycap(struct soc_camera_host *ici,
1346                              struct v4l2_capability *cap)
1347 {
1348         strlcpy(cap->card, "R_Car_VIN", sizeof(cap->card));
1349         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1350         return 0;
1351 }
1352
1353 static int rcar_vin_init_videobuf2(struct vb2_queue *vq,
1354                                    struct soc_camera_device *icd)
1355 {
1356         vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1357         vq->io_modes = VB2_MMAP | VB2_USERPTR;
1358         vq->drv_priv = icd;
1359         vq->ops = &rcar_vin_vb2_ops;
1360         vq->mem_ops = &vb2_dma_contig_memops;
1361         vq->buf_struct_size = sizeof(struct rcar_vin_buffer);
1362         vq->timestamp_type  = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1363
1364         return vb2_queue_init(vq);
1365 }
1366
1367 static struct soc_camera_host_ops rcar_vin_host_ops = {
1368         .owner          = THIS_MODULE,
1369         .add            = rcar_vin_add_device,
1370         .remove         = rcar_vin_remove_device,
1371         .clock_start    = rcar_vin_clock_start,
1372         .clock_stop     = rcar_vin_clock_stop,
1373         .get_formats    = rcar_vin_get_formats,
1374         .put_formats    = rcar_vin_put_formats,
1375         .get_crop       = rcar_vin_get_crop,
1376         .set_crop       = rcar_vin_set_crop,
1377         .try_fmt        = rcar_vin_try_fmt,
1378         .set_fmt        = rcar_vin_set_fmt,
1379         .poll           = rcar_vin_poll,
1380         .querycap       = rcar_vin_querycap,
1381         .set_bus_param  = rcar_vin_set_bus_param,
1382         .init_videobuf2 = rcar_vin_init_videobuf2,
1383 };
1384
1385 static struct platform_device_id rcar_vin_id_table[] = {
1386         { "r8a7790-vin",  RCAR_H2 },
1387         { "r8a7779-vin",  RCAR_H1 },
1388         { "r8a7778-vin",  RCAR_M1 },
1389         { "uPD35004-vin", RCAR_E1 },
1390         {},
1391 };
1392 MODULE_DEVICE_TABLE(platform, rcar_vin_id_table);
1393
1394 static int rcar_vin_probe(struct platform_device *pdev)
1395 {
1396         struct rcar_vin_priv *priv;
1397         struct resource *mem;
1398         struct rcar_vin_platform_data *pdata;
1399         int irq, ret;
1400
1401         pdata = pdev->dev.platform_data;
1402         if (!pdata || !pdata->flags) {
1403                 dev_err(&pdev->dev, "platform data not set\n");
1404                 return -EINVAL;
1405         }
1406
1407         mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1408         if (mem == NULL)
1409                 return -EINVAL;
1410
1411         irq = platform_get_irq(pdev, 0);
1412         if (irq <= 0)
1413                 return -EINVAL;
1414
1415         priv = devm_kzalloc(&pdev->dev, sizeof(struct rcar_vin_priv),
1416                             GFP_KERNEL);
1417         if (!priv)
1418                 return -ENOMEM;
1419
1420         priv->base = devm_ioremap_resource(&pdev->dev, mem);
1421         if (IS_ERR(priv->base))
1422                 return PTR_ERR(priv->base);
1423
1424         ret = devm_request_irq(&pdev->dev, irq, rcar_vin_irq, IRQF_SHARED,
1425                                dev_name(&pdev->dev), priv);
1426         if (ret)
1427                 return ret;
1428
1429         priv->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
1430         if (IS_ERR(priv->alloc_ctx))
1431                 return PTR_ERR(priv->alloc_ctx);
1432
1433         priv->ici.priv = priv;
1434         priv->ici.v4l2_dev.dev = &pdev->dev;
1435         priv->ici.nr = pdev->id;
1436         priv->ici.drv_name = dev_name(&pdev->dev);
1437         priv->ici.ops = &rcar_vin_host_ops;
1438
1439         priv->pdata = pdata;
1440         priv->chip = pdev->id_entry->driver_data;
1441         spin_lock_init(&priv->lock);
1442         INIT_LIST_HEAD(&priv->capture);
1443
1444         priv->state = STOPPED;
1445
1446         pm_suspend_ignore_children(&pdev->dev, true);
1447         pm_runtime_enable(&pdev->dev);
1448
1449         ret = soc_camera_host_register(&priv->ici);
1450         if (ret)
1451                 goto cleanup;
1452
1453         return 0;
1454
1455 cleanup:
1456         pm_runtime_disable(&pdev->dev);
1457         vb2_dma_contig_cleanup_ctx(priv->alloc_ctx);
1458
1459         return ret;
1460 }
1461
1462 static int rcar_vin_remove(struct platform_device *pdev)
1463 {
1464         struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
1465         struct rcar_vin_priv *priv = container_of(soc_host,
1466                                                   struct rcar_vin_priv, ici);
1467
1468         soc_camera_host_unregister(soc_host);
1469         pm_runtime_disable(&pdev->dev);
1470         vb2_dma_contig_cleanup_ctx(priv->alloc_ctx);
1471
1472         return 0;
1473 }
1474
1475 static struct platform_driver rcar_vin_driver = {
1476         .probe          = rcar_vin_probe,
1477         .remove         = rcar_vin_remove,
1478         .driver         = {
1479                 .name           = DRV_NAME,
1480                 .owner          = THIS_MODULE,
1481         },
1482         .id_table       = rcar_vin_id_table,
1483 };
1484
1485 module_platform_driver(rcar_vin_driver);
1486
1487 MODULE_LICENSE("GPL");
1488 MODULE_ALIAS("platform:rcar_vin");
1489 MODULE_DESCRIPTION("Renesas R-Car VIN camera host driver");