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/io.h>
  20 #include <linux/kernel.h>
  21 #include <linux/module.h>
  22 #include <linux/platform_data/camera-rcar.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/pm_runtime.h>
  25 #include <linux/slab.h>
  26 #include <linux/videodev2.h>
  27
  28 #include <media/soc_camera.h>
  29 #include <media/soc_mediabus.h>
  30 #include <media/v4l2-common.h>
  31 #include <media/v4l2-dev.h>
  32 #include <media/v4l2-device.h>
  33 #include <media/v4l2-mediabus.h>
  34 #include <media/v4l2-subdev.h>
  35 #include <media/videobuf2-dma-contig.h>
  36
  37 #include "soc_scale_crop.h"
  38
  39 #define DRV_NAME "rcar_vin"
  40
  41 /* Register offsets for R-Car VIN */
  42 #define VNMC_REG        0x00    /* Video n Main Control Register */
  43 #define VNMS_REG        0x04    /* Video n Module Status Register */
  44 #define VNFC_REG        0x08    /* Video n Frame Capture Register */
  45 #define VNSLPRC_REG     0x0C    /* Video n Start Line Pre-Clip Register */
  46 #define VNELPRC_REG     0x10    /* Video n End Line Pre-Clip Register */
  47 #define VNSPPRC_REG     0x14    /* Video n Start Pixel Pre-Clip Register */
  48 #define VNEPPRC_REG     0x18    /* Video n End Pixel Pre-Clip Register */
  49 #define VNSLPOC_REG     0x1C    /* Video n Start Line Post-Clip Register */
  50 #define VNELPOC_REG     0x20    /* Video n End Line Post-Clip Register */
  51 #define VNSPPOC_REG     0x24    /* Video n Start Pixel Post-Clip Register */
  52 #define VNEPPOC_REG     0x28    /* Video n End Pixel Post-Clip Register */
  53 #define VNIS_REG        0x2C    /* Video n Image Stride Register */
  54 #define VNMB_REG(m)     (0x30 + ((m) << 2)) /* Video n Memory Base m Register */
  55 #define VNIE_REG        0x40    /* Video n Interrupt Enable Register */
  56 #define VNINTS_REG      0x44    /* Video n Interrupt Status Register */
  57 #define VNSI_REG        0x48    /* Video n Scanline Interrupt Register */
  58 #define VNMTC_REG       0x4C    /* Video n Memory Transfer Control Register */
  59 #define VNYS_REG        0x50    /* Video n Y Scale Register */
  60 #define VNXS_REG        0x54    /* Video n X Scale Register */
  61 #define VNDMR_REG       0x58    /* Video n Data Mode Register */
  62 #define VNDMR2_REG      0x5C    /* Video n Data Mode Register 2 */
  63 #define VNUVAOF_REG     0x60    /* Video n UV Address Offset Register */
  64
  65 /* Register bit fields for R-Car VIN */
  66 /* Video n Main Control Register bits */
  67 #define VNMC_FOC                (1 << 21)
  68 #define VNMC_YCAL               (1 << 19)
  69 #define VNMC_INF_YUV8_BT656     (0 << 16)
  70 #define VNMC_INF_YUV8_BT601     (1 << 16)
  71 #define VNMC_INF_YUV10_BT656    (2 << 16)
  72 #define VNMC_INF_YUV10_BT601    (3 << 16)
  73 #define VNMC_INF_YUV16          (5 << 16)
  74 #define VNMC_VUP                (1 << 10)
  75 #define VNMC_IM_ODD             (0 << 3)
  76 #define VNMC_IM_ODD_EVEN        (1 << 3)
  77 #define VNMC_IM_EVEN            (2 << 3)
  78 #define VNMC_IM_FULL            (3 << 3)
  79 #define VNMC_BPS                (1 << 1)
  80 #define VNMC_ME                 (1 << 0)
  81
  82 /* Video n Module Status Register bits */
  83 #define VNMS_FBS_MASK           (3 << 3)
  84 #define VNMS_FBS_SHIFT          3
  85 #define VNMS_AV                 (1 << 1)
  86 #define VNMS_CA                 (1 << 0)
  87
  88 /* Video n Frame Capture Register bits */
  89 #define VNFC_C_FRAME            (1 << 1)
  90 #define VNFC_S_FRAME            (1 << 0)
  91
  92 /* Video n Interrupt Enable Register bits */
  93 #define VNIE_FIE                (1 << 4)
  94 #define VNIE_EFE                (1 << 1)
  95
  96 /* Video n Data Mode Register bits */
  97 #define VNDMR_EXRGB             (1 << 8)
  98 #define VNDMR_BPSM              (1 << 4)
  99 #define VNDMR_DTMD_YCSEP        (1 << 1)
 100 #define VNDMR_DTMD_ARGB1555     (1 << 0)
 101
 102 /* Video n Data Mode Register 2 bits */
 103 #define VNDMR2_VPS              (1 << 30)
 104 #define VNDMR2_HPS              (1 << 29)
 105 #define VNDMR2_FTEV             (1 << 17)
 106
 107 #define VIN_MAX_WIDTH           2048
 108 #define VIN_MAX_HEIGHT          2048
 109
 110 enum chip_id {
 111         RCAR_GEN2,
 112         RCAR_H1,
 113         RCAR_M1,
 114         RCAR_E1,
 115 };
 116
 117 enum rcar_vin_state {
 118         STOPPED = 0,
 119         RUNNING,
 120         STOPPING,
 121 };
 122
 123 struct rcar_vin_priv {
 124         void __iomem                    *base;
 125         spinlock_t                      lock;
 126         int                             sequence;
 127         /* State of the VIN module in capturing mode */
 128         enum rcar_vin_state             state;
 129         struct rcar_vin_platform_data   *pdata;
 130         struct soc_camera_host          ici;
 131         struct list_head                capture;
 132 #define MAX_BUFFER_NUM                  3
 133         struct vb2_buffer               *queue_buf[MAX_BUFFER_NUM];
 134         struct vb2_alloc_ctx            *alloc_ctx;
 135         enum v4l2_field                 field;
 136         unsigned int                    vb_count;
 137         unsigned int                    nr_hw_slots;
 138         bool                            request_to_stop;
 139         struct completion               capture_stop;
 140         enum chip_id                    chip;
 141 };
 142
 143 #define is_continuous_transfer(priv)    (priv->vb_count > MAX_BUFFER_NUM)
 144
 145 struct rcar_vin_buffer {
 146         struct vb2_buffer               vb;
 147         struct list_head                list;
 148 };
 149
 150 #define to_buf_list(vb2_buffer) (&container_of(vb2_buffer, \
 151                                                        struct rcar_vin_buffer, \
 152                                                        vb)->list)
 153
 154 struct rcar_vin_cam {
 155         /* VIN offsets within the camera output, before the VIN scaler */
 156         unsigned int                    vin_left;
 157         unsigned int                    vin_top;
 158         /* Client output, as seen by the VIN */
 159         unsigned int                    width;
 160         unsigned int                    height;
 161         /*
 162          * User window from S_CROP / G_CROP, produced by client cropping and
 163          * scaling, VIN scaling and VIN cropping, mapped back onto the client
 164          * input window
 165          */
 166         struct v4l2_rect                subrect;
 167         /* Camera cropping rectangle */
 168         struct v4l2_rect                rect;
 169         const struct soc_mbus_pixelfmt  *extra_fmt;
 170 };
 171
 172 /*
 173  * .queue_setup() is called to check whether the driver can accept the requested
 174  * number of buffers and to fill in plane sizes for the current frame format if
 175  * required
 176  */
 177 static int rcar_vin_videobuf_setup(struct vb2_queue *vq,
 178                                    const struct v4l2_format *fmt,
 179                                    unsigned int *count,
 180                                    unsigned int *num_planes,
 181                                    unsigned int sizes[], void *alloc_ctxs[])
 182 {
 183         struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
 184         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 185         struct rcar_vin_priv *priv = ici->priv;
 186
 187         if (fmt) {
 188                 const struct soc_camera_format_xlate *xlate;
 189                 unsigned int bytes_per_line;
 190                 int ret;
 191
 192                 xlate = soc_camera_xlate_by_fourcc(icd,
 193                                                    fmt->fmt.pix.pixelformat);
 194                 if (!xlate)
 195                         return -EINVAL;
 196                 ret = soc_mbus_bytes_per_line(fmt->fmt.pix.width,
 197                                               xlate->host_fmt);
 198                 if (ret < 0)
 199                         return ret;
 200
 201                 bytes_per_line = max_t(u32, fmt->fmt.pix.bytesperline, ret);
 202
 203                 ret = soc_mbus_image_size(xlate->host_fmt, bytes_per_line,
 204                                           fmt->fmt.pix.height);
 205                 if (ret < 0)
 206                         return ret;
 207
 208                 sizes[0] = max_t(u32, fmt->fmt.pix.sizeimage, ret);
 209         } else {
 210                 /* Called from VIDIOC_REQBUFS or in compatibility mode */
 211                 sizes[0] = icd->sizeimage;
 212         }
 213
 214         alloc_ctxs[0] = priv->alloc_ctx;
 215
 216         if (!vq->num_buffers)
 217                 priv->sequence = 0;
 218
 219         if (!*count)
 220                 *count = 2;
 221         priv->vb_count = *count;
 222
 223         *num_planes = 1;
 224
 225         /* Number of hardware slots */
 226         if (is_continuous_transfer(priv))
 227                 priv->nr_hw_slots = MAX_BUFFER_NUM;
 228         else
 229                 priv->nr_hw_slots = 1;
 230
 231         dev_dbg(icd->parent, "count=%d, size=%u\n", *count, sizes[0]);
 232
 233         return 0;
 234 }
 235
 236 static int rcar_vin_setup(struct rcar_vin_priv *priv)
 237 {
 238         struct soc_camera_device *icd = priv->ici.icd;
 239         struct rcar_vin_cam *cam = icd->host_priv;
 240         u32 vnmc, dmr, interrupts;
 241         bool progressive = false, output_is_yuv = false;
 242
 243         switch (priv->field) {
 244         case V4L2_FIELD_TOP:
 245                 vnmc = VNMC_IM_ODD;
 246                 break;
 247         case V4L2_FIELD_BOTTOM:
 248                 vnmc = VNMC_IM_EVEN;
 249                 break;
 250         case V4L2_FIELD_INTERLACED:
 251         case V4L2_FIELD_INTERLACED_TB:
 252                 vnmc = VNMC_IM_FULL;
 253                 break;
 254         case V4L2_FIELD_INTERLACED_BT:
 255                 vnmc = VNMC_IM_FULL | VNMC_FOC;
 256                 break;
 257         case V4L2_FIELD_NONE:
 258                 if (is_continuous_transfer(priv)) {
 259                         vnmc = VNMC_IM_ODD_EVEN;
 260                         progressive = true;
 261                 } else {
 262                         vnmc = VNMC_IM_ODD;
 263                 }
 264                 break;
 265         default:
 266                 vnmc = VNMC_IM_ODD;
 267                 break;
 268         }
 269
 270         /* input interface */
 271         switch (icd->current_fmt->code) {
 272         case V4L2_MBUS_FMT_YUYV8_1X16:
 273                 /* BT.601/BT.1358 16bit YCbCr422 */
 274                 vnmc |= VNMC_INF_YUV16;
 275                 break;
 276         case V4L2_MBUS_FMT_YUYV8_2X8:
 277                 /* BT.656 8bit YCbCr422 or BT.601 8bit YCbCr422 */
 278                 vnmc |= priv->pdata->flags & RCAR_VIN_BT656 ?
 279                         VNMC_INF_YUV8_BT656 : VNMC_INF_YUV8_BT601;
 280                 break;
 281         case V4L2_MBUS_FMT_YUYV10_2X10:
 282                 /* BT.656 10bit YCbCr422 or BT.601 10bit YCbCr422 */
 283                 vnmc |= priv->pdata->flags & RCAR_VIN_BT656 ?
 284                         VNMC_INF_YUV10_BT656 : VNMC_INF_YUV10_BT601;
 285                 break;
 286         default:
 287                 break;
 288         }
 289
 290         /* output format */
 291         switch (icd->current_fmt->host_fmt->fourcc) {
 292         case V4L2_PIX_FMT_NV16:
 293                 iowrite32(ALIGN(cam->width * cam->height, 0x80),
 294                           priv->base + VNUVAOF_REG);
 295                 dmr = VNDMR_DTMD_YCSEP;
 296                 output_is_yuv = true;
 297                 break;
 298         case V4L2_PIX_FMT_YUYV:
 299                 dmr = VNDMR_BPSM;
 300                 output_is_yuv = true;
 301                 break;
 302         case V4L2_PIX_FMT_UYVY:
 303                 dmr = 0;
 304                 output_is_yuv = true;
 305                 break;
 306         case V4L2_PIX_FMT_RGB555X:
 307                 dmr = VNDMR_DTMD_ARGB1555;
 308                 break;
 309         case V4L2_PIX_FMT_RGB565:
 310                 dmr = 0;
 311                 break;
 312         case V4L2_PIX_FMT_RGB32:
 313                 if (priv->chip == RCAR_GEN2 || priv->chip == RCAR_H1 ||
 314                     priv->chip == RCAR_E1) {
 315                         dmr = VNDMR_EXRGB;
 316                         break;
 317                 }
 318         default:
 319                 dev_warn(icd->parent, "Invalid fourcc format (0x%x)\n",
 320                          icd->current_fmt->host_fmt->fourcc);
 321                 return -EINVAL;
 322         }
 323
 324         /* Always update on field change */
 325         vnmc |= VNMC_VUP;
 326
 327         /* If input and output use the same colorspace, use bypass mode */
 328         if (output_is_yuv)
 329                 vnmc |= VNMC_BPS;
 330
 331         /* progressive or interlaced mode */
 332         interrupts = progressive ? VNIE_FIE | VNIE_EFE : VNIE_EFE;
 333
 334         /* ack interrupts */
 335         iowrite32(interrupts, priv->base + VNINTS_REG);
 336         /* enable interrupts */
 337         iowrite32(interrupts, priv->base + VNIE_REG);
 338         /* start capturing */
 339         iowrite32(dmr, priv->base + VNDMR_REG);
 340         iowrite32(vnmc | VNMC_ME, priv->base + VNMC_REG);
 341
 342         return 0;
 343 }
 344
 345 static void rcar_vin_capture(struct rcar_vin_priv *priv)
 346 {
 347         if (is_continuous_transfer(priv))
 348                 /* Continuous Frame Capture Mode */
 349                 iowrite32(VNFC_C_FRAME, priv->base + VNFC_REG);
 350         else
 351                 /* Single Frame Capture Mode */
 352                 iowrite32(VNFC_S_FRAME, priv->base + VNFC_REG);
 353 }
 354
 355 static void rcar_vin_request_capture_stop(struct rcar_vin_priv *priv)
 356 {
 357         priv->state = STOPPING;
 358
 359         /* set continuous & single transfer off */
 360         iowrite32(0, priv->base + VNFC_REG);
 361         /* disable capture (release DMA buffer), reset */
 362         iowrite32(ioread32(priv->base + VNMC_REG) & ~VNMC_ME,
 363                   priv->base + VNMC_REG);
 364
 365         /* update the status if stopped already */
 366         if (!(ioread32(priv->base + VNMS_REG) & VNMS_CA))
 367                 priv->state = STOPPED;
 368 }
 369
 370 static int rcar_vin_get_free_hw_slot(struct rcar_vin_priv *priv)
 371 {
 372         int slot;
 373
 374         for (slot = 0; slot < priv->nr_hw_slots; slot++)
 375                 if (priv->queue_buf[slot] == NULL)
 376                         return slot;
 377
 378         return -1;
 379 }
 380
 381 static int rcar_vin_hw_ready(struct rcar_vin_priv *priv)
 382 {
 383         /* Ensure all HW slots are filled */
 384         return rcar_vin_get_free_hw_slot(priv) < 0 ? 1 : 0;
 385 }
 386
 387 /* Moves a buffer from the queue to the HW slots */
 388 static int rcar_vin_fill_hw_slot(struct rcar_vin_priv *priv)
 389 {
 390         struct vb2_buffer *vb;
 391         dma_addr_t phys_addr_top;
 392         int slot;
 393
 394         if (list_empty(&priv->capture))
 395                 return 0;
 396
 397         /* Find a free HW slot */
 398         slot = rcar_vin_get_free_hw_slot(priv);
 399         if (slot < 0)
 400                 return 0;
 401
 402         vb = &list_entry(priv->capture.next, struct rcar_vin_buffer, list)->vb;
 403         list_del_init(to_buf_list(vb));
 404         priv->queue_buf[slot] = vb;
 405         phys_addr_top = vb2_dma_contig_plane_dma_addr(vb, 0);
 406         iowrite32(phys_addr_top, priv->base + VNMB_REG(slot));
 407
 408         return 1;
 409 }
 410
 411 static void rcar_vin_videobuf_queue(struct vb2_buffer *vb)
 412 {
 413         struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
 414         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 415         struct rcar_vin_priv *priv = ici->priv;
 416         unsigned long size;
 417
 418         size = icd->sizeimage;
 419
 420         if (vb2_plane_size(vb, 0) < size) {
 421                 dev_err(icd->parent, "Buffer #%d too small (%lu < %lu)\n",
 422                         vb->v4l2_buf.index, vb2_plane_size(vb, 0), size);
 423                 goto error;
 424         }
 425
 426         vb2_set_plane_payload(vb, 0, size);
 427
 428         dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
 429                 vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
 430
 431         spin_lock_irq(&priv->lock);
 432
 433         list_add_tail(to_buf_list(vb), &priv->capture);
 434         rcar_vin_fill_hw_slot(priv);
 435
 436         /* If we weren't running, and have enough buffers, start capturing! */
 437         if (priv->state != RUNNING && rcar_vin_hw_ready(priv)) {
 438                 if (rcar_vin_setup(priv)) {
 439                         /* Submit error */
 440                         list_del_init(to_buf_list(vb));
 441                         spin_unlock_irq(&priv->lock);
 442                         goto error;
 443                 }
 444                 priv->request_to_stop = false;
 445                 init_completion(&priv->capture_stop);
 446                 priv->state = RUNNING;
 447                 rcar_vin_capture(priv);
 448         }
 449
 450         spin_unlock_irq(&priv->lock);
 451
 452         return;
 453
 454 error:
 455         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
 456 }
 457
 458 static void rcar_vin_videobuf_release(struct vb2_buffer *vb)
 459 {
 460         struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
 461         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 462         struct rcar_vin_priv *priv = ici->priv;
 463         unsigned int i;
 464         int buf_in_use = 0;
 465
 466         spin_lock_irq(&priv->lock);
 467
 468         /* Is the buffer in use by the VIN hardware? */
 469         for (i = 0; i < MAX_BUFFER_NUM; i++) {
 470                 if (priv->queue_buf[i] == vb) {
 471                         buf_in_use = 1;
 472                         break;
 473                 }
 474         }
 475
 476         if (buf_in_use) {
 477                 while (priv->state != STOPPED) {
 478
 479                         /* issue stop if running */
 480                         if (priv->state == RUNNING)
 481                                 rcar_vin_request_capture_stop(priv);
 482
 483                         /* wait until capturing has been stopped */
 484                         if (priv->state == STOPPING) {
 485                                 priv->request_to_stop = true;
 486                                 spin_unlock_irq(&priv->lock);
 487                                 wait_for_completion(&priv->capture_stop);
 488                                 spin_lock_irq(&priv->lock);
 489                         }
 490                 }
 491                 /*
 492                  * Capturing has now stopped. The buffer we have been asked
 493                  * to release could be any of the current buffers in use, so
 494                  * release all buffers that are in use by HW
 495                  */
 496                 for (i = 0; i < MAX_BUFFER_NUM; i++) {
 497                         if (priv->queue_buf[i]) {
 498                                 vb2_buffer_done(priv->queue_buf[i],
 499                                         VB2_BUF_STATE_ERROR);
 500                                 priv->queue_buf[i] = NULL;
 501                         }
 502                 }
 503         } else {
 504                 list_del_init(to_buf_list(vb));
 505         }
 506
 507         spin_unlock_irq(&priv->lock);
 508 }
 509
 510 static int rcar_vin_videobuf_init(struct vb2_buffer *vb)
 511 {
 512         INIT_LIST_HEAD(to_buf_list(vb));
 513         return 0;
 514 }
 515
 516 static int rcar_vin_stop_streaming(struct vb2_queue *vq)
 517 {
 518         struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
 519         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 520         struct rcar_vin_priv *priv = ici->priv;
 521         struct list_head *buf_head, *tmp;
 522
 523         spin_lock_irq(&priv->lock);
 524         list_for_each_safe(buf_head, tmp, &priv->capture)
 525                 list_del_init(buf_head);
 526         spin_unlock_irq(&priv->lock);
 527
 528         return 0;
 529 }
 530
 531 static struct vb2_ops rcar_vin_vb2_ops = {
 532         .queue_setup    = rcar_vin_videobuf_setup,
 533         .buf_init       = rcar_vin_videobuf_init,
 534         .buf_cleanup    = rcar_vin_videobuf_release,
 535         .buf_queue      = rcar_vin_videobuf_queue,
 536         .stop_streaming = rcar_vin_stop_streaming,
 537         .wait_prepare   = soc_camera_unlock,
 538         .wait_finish    = soc_camera_lock,
 539 };
 540
 541 static irqreturn_t rcar_vin_irq(int irq, void *data)
 542 {
 543         struct rcar_vin_priv *priv = data;
 544         u32 int_status;
 545         bool can_run = false, hw_stopped;
 546         int slot;
 547         unsigned int handled = 0;
 548
 549         spin_lock(&priv->lock);
 550
 551         int_status = ioread32(priv->base + VNINTS_REG);
 552         if (!int_status)
 553                 goto done;
 554         /* ack interrupts */
 555         iowrite32(int_status, priv->base + VNINTS_REG);
 556         handled = 1;
 557
 558         /* nothing to do if capture status is 'STOPPED' */
 559         if (priv->state == STOPPED)
 560                 goto done;
 561
 562         hw_stopped = !(ioread32(priv->base + VNMS_REG) & VNMS_CA);
 563
 564         if (!priv->request_to_stop) {
 565                 if (is_continuous_transfer(priv))
 566                         slot = (ioread32(priv->base + VNMS_REG) &
 567                                 VNMS_FBS_MASK) >> VNMS_FBS_SHIFT;
 568                 else
 569                         slot = 0;
 570
 571                 priv->queue_buf[slot]->v4l2_buf.field = priv->field;
 572                 priv->queue_buf[slot]->v4l2_buf.sequence = priv->sequence++;
 573                 do_gettimeofday(&priv->queue_buf[slot]->v4l2_buf.timestamp);
 574                 vb2_buffer_done(priv->queue_buf[slot], VB2_BUF_STATE_DONE);
 575                 priv->queue_buf[slot] = NULL;
 576
 577                 if (priv->state != STOPPING)
 578                         can_run = rcar_vin_fill_hw_slot(priv);
 579
 580                 if (hw_stopped || !can_run) {
 581                         priv->state = STOPPED;
 582                 } else if (is_continuous_transfer(priv) &&
 583                            list_empty(&priv->capture) &&
 584                            priv->state == RUNNING) {
 585                         /*
 586                          * The continuous capturing requires an explicit stop
 587                          * operation when there is no buffer to be set into
 588                          * the VnMBm registers.
 589                          */
 590                         rcar_vin_request_capture_stop(priv);
 591                 } else {
 592                         rcar_vin_capture(priv);
 593                 }
 594
 595         } else if (hw_stopped) {
 596                 priv->state = STOPPED;
 597                 priv->request_to_stop = false;
 598                 complete(&priv->capture_stop);
 599         }
 600
 601 done:
 602         spin_unlock(&priv->lock);
 603
 604         return IRQ_RETVAL(handled);
 605 }
 606
 607 static int rcar_vin_add_device(struct soc_camera_device *icd)
 608 {
 609         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 610         struct rcar_vin_priv *priv = ici->priv;
 611         int i;
 612
 613         for (i = 0; i < MAX_BUFFER_NUM; i++)
 614                 priv->queue_buf[i] = NULL;
 615
 616         pm_runtime_get_sync(ici->v4l2_dev.dev);
 617
 618         dev_dbg(icd->parent, "R-Car VIN driver attached to camera %d\n",
 619                 icd->devnum);
 620
 621         return 0;
 622 }
 623
 624 static void rcar_vin_remove_device(struct soc_camera_device *icd)
 625 {
 626         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 627         struct rcar_vin_priv *priv = ici->priv;
 628         struct vb2_buffer *vb;
 629         int i;
 630
 631         /* disable capture, disable interrupts */
 632         iowrite32(ioread32(priv->base + VNMC_REG) & ~VNMC_ME,
 633                   priv->base + VNMC_REG);
 634         iowrite32(0, priv->base + VNIE_REG);
 635
 636         priv->state = STOPPED;
 637         priv->request_to_stop = false;
 638
 639         /* make sure active buffer is cancelled */
 640         spin_lock_irq(&priv->lock);
 641         for (i = 0; i < MAX_BUFFER_NUM; i++) {
 642                 vb = priv->queue_buf[i];
 643                 if (vb) {
 644                         list_del_init(to_buf_list(vb));
 645                         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
 646                 }
 647         }
 648         spin_unlock_irq(&priv->lock);
 649
 650         pm_runtime_put(ici->v4l2_dev.dev);
 651
 652         dev_dbg(icd->parent, "R-Car VIN driver detached from camera %d\n",
 653                 icd->devnum);
 654 }
 655
 656 /* Called with .host_lock held */
 657 static int rcar_vin_clock_start(struct soc_camera_host *ici)
 658 {
 659         /* VIN does not have "mclk" */
 660         return 0;
 661 }
 662
 663 /* Called with .host_lock held */
 664 static void rcar_vin_clock_stop(struct soc_camera_host *ici)
 665 {
 666         /* VIN does not have "mclk" */
 667 }
 668
 669 /* rect is guaranteed to not exceed the scaled camera rectangle */
 670 static int rcar_vin_set_rect(struct soc_camera_device *icd)
 671 {
 672         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 673         struct rcar_vin_cam *cam = icd->host_priv;
 674         struct rcar_vin_priv *priv = ici->priv;
 675         unsigned int left_offset, top_offset;
 676         unsigned char dsize = 0;
 677         struct v4l2_rect *cam_subrect = &cam->subrect;
 678
 679         dev_dbg(icd->parent, "Crop %ux%u@%u:%u\n",
 680                 icd->user_width, icd->user_height, cam->vin_left, cam->vin_top);
 681
 682         left_offset = cam->vin_left;
 683         top_offset = cam->vin_top;
 684
 685         if (icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_RGB32 &&
 686             priv->chip == RCAR_E1)
 687                 dsize = 1;
 688
 689         dev_dbg(icd->parent, "Cam %ux%u@%u:%u\n",
 690                 cam->width, cam->height, cam->vin_left, cam->vin_top);
 691         dev_dbg(icd->parent, "Cam subrect %ux%u@%u:%u\n",
 692                 cam_subrect->width, cam_subrect->height,
 693                 cam_subrect->left, cam_subrect->top);
 694
 695         /* Set Start/End Pixel/Line Pre-Clip */
 696         iowrite32(left_offset << dsize, priv->base + VNSPPRC_REG);
 697         iowrite32((left_offset + cam->width - 1) << dsize,
 698                   priv->base + VNEPPRC_REG);
 699         switch (priv->field) {
 700         case V4L2_FIELD_INTERLACED:
 701         case V4L2_FIELD_INTERLACED_TB:
 702         case V4L2_FIELD_INTERLACED_BT:
 703                 iowrite32(top_offset / 2, priv->base + VNSLPRC_REG);
 704                 iowrite32((top_offset + cam->height) / 2 - 1,
 705                           priv->base + VNELPRC_REG);
 706                 break;
 707         default:
 708                 iowrite32(top_offset, priv->base + VNSLPRC_REG);
 709                 iowrite32(top_offset + cam->height - 1,
 710                           priv->base + VNELPRC_REG);
 711                 break;
 712         }
 713
 714         /* Set Start/End Pixel/Line Post-Clip */
 715         iowrite32(0, priv->base + VNSPPOC_REG);
 716         iowrite32(0, priv->base + VNSLPOC_REG);
 717         iowrite32((cam_subrect->width - 1) << dsize, priv->base + VNEPPOC_REG);
 718         switch (priv->field) {
 719         case V4L2_FIELD_INTERLACED:
 720         case V4L2_FIELD_INTERLACED_TB:
 721         case V4L2_FIELD_INTERLACED_BT:
 722                 iowrite32(cam_subrect->height / 2 - 1,
 723                           priv->base + VNELPOC_REG);
 724                 break;
 725         default:
 726                 iowrite32(cam_subrect->height - 1, priv->base + VNELPOC_REG);
 727                 break;
 728         }
 729
 730         iowrite32(ALIGN(cam->width, 0x10), priv->base + VNIS_REG);
 731
 732         return 0;
 733 }
 734
 735 static void capture_stop_preserve(struct rcar_vin_priv *priv, u32 *vnmc)
 736 {
 737         *vnmc = ioread32(priv->base + VNMC_REG);
 738         /* module disable */
 739         iowrite32(*vnmc & ~VNMC_ME, priv->base + VNMC_REG);
 740 }
 741
 742 static void capture_restore(struct rcar_vin_priv *priv, u32 vnmc)
 743 {
 744         unsigned long timeout = jiffies + 10 * HZ;
 745
 746         /*
 747          * Wait until the end of the current frame. It can take a long time,
 748          * but if it has been aborted by a MRST1 reset, it should exit sooner.
 749          */
 750         while ((ioread32(priv->base + VNMS_REG) & VNMS_AV) &&
 751                 time_before(jiffies, timeout))
 752                 msleep(1);
 753
 754         if (time_after(jiffies, timeout)) {
 755                 dev_err(priv->ici.v4l2_dev.dev,
 756                         "Timeout waiting for frame end! Interface problem?\n");
 757                 return;
 758         }
 759
 760         iowrite32(vnmc, priv->base + VNMC_REG);
 761 }
 762
 763 #define VIN_MBUS_FLAGS  (V4L2_MBUS_MASTER |             \
 764                          V4L2_MBUS_PCLK_SAMPLE_RISING | \
 765                          V4L2_MBUS_HSYNC_ACTIVE_HIGH |  \
 766                          V4L2_MBUS_HSYNC_ACTIVE_LOW |   \
 767                          V4L2_MBUS_VSYNC_ACTIVE_HIGH |  \
 768                          V4L2_MBUS_VSYNC_ACTIVE_LOW |   \
 769                          V4L2_MBUS_DATA_ACTIVE_HIGH)
 770
 771 static int rcar_vin_set_bus_param(struct soc_camera_device *icd)
 772 {
 773         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 774         struct rcar_vin_priv *priv = ici->priv;
 775         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
 776         struct v4l2_mbus_config cfg;
 777         unsigned long common_flags;
 778         u32 vnmc;
 779         u32 val;
 780         int ret;
 781
 782         capture_stop_preserve(priv, &vnmc);
 783
 784         ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
 785         if (!ret) {
 786                 common_flags = soc_mbus_config_compatible(&cfg, VIN_MBUS_FLAGS);
 787                 if (!common_flags) {
 788                         dev_warn(icd->parent,
 789                                  "MBUS flags incompatible: camera 0x%x, host 0x%x\n",
 790                                  cfg.flags, VIN_MBUS_FLAGS);
 791                         return -EINVAL;
 792                 }
 793         } else if (ret != -ENOIOCTLCMD) {
 794                 return ret;
 795         } else {
 796                 common_flags = VIN_MBUS_FLAGS;
 797         }
 798
 799         /* Make choises, based on platform preferences */
 800         if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
 801             (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
 802                 if (priv->pdata->flags & RCAR_VIN_HSYNC_ACTIVE_LOW)
 803                         common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH;
 804                 else
 805                         common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW;
 806         }
 807
 808         if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) &&
 809             (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) {
 810                 if (priv->pdata->flags & RCAR_VIN_VSYNC_ACTIVE_LOW)
 811                         common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH;
 812                 else
 813                         common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW;
 814         }
 815
 816         cfg.flags = common_flags;
 817         ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg);
 818         if (ret < 0 && ret != -ENOIOCTLCMD)
 819                 return ret;
 820
 821         val = priv->field == V4L2_FIELD_NONE ? VNDMR2_FTEV : 0;
 822         if (!(common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW))
 823                 val |= VNDMR2_VPS;
 824         if (!(common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW))
 825                 val |= VNDMR2_HPS;
 826         iowrite32(val, priv->base + VNDMR2_REG);
 827
 828         ret = rcar_vin_set_rect(icd);
 829         if (ret < 0)
 830                 return ret;
 831
 832         capture_restore(priv, vnmc);
 833
 834         return 0;
 835 }
 836
 837 static int rcar_vin_try_bus_param(struct soc_camera_device *icd,
 838                                   unsigned char buswidth)
 839 {
 840         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
 841         struct v4l2_mbus_config cfg;
 842         int ret;
 843
 844         ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
 845         if (ret == -ENOIOCTLCMD)
 846                 return 0;
 847         else if (ret)
 848                 return ret;
 849
 850         if (buswidth > 24)
 851                 return -EINVAL;
 852
 853         /* check is there common mbus flags */
 854         ret = soc_mbus_config_compatible(&cfg, VIN_MBUS_FLAGS);
 855         if (ret)
 856                 return 0;
 857
 858         dev_warn(icd->parent,
 859                 "MBUS flags incompatible: camera 0x%x, host 0x%x\n",
 860                  cfg.flags, VIN_MBUS_FLAGS);
 861
 862         return -EINVAL;
 863 }
 864
 865 static bool rcar_vin_packing_supported(const struct soc_mbus_pixelfmt *fmt)
 866 {
 867         return  fmt->packing == SOC_MBUS_PACKING_NONE ||
 868                 (fmt->bits_per_sample > 8 &&
 869                  fmt->packing == SOC_MBUS_PACKING_EXTEND16);
 870 }
 871
 872 static const struct soc_mbus_pixelfmt rcar_vin_formats[] = {
 873         {
 874                 .fourcc                 = V4L2_PIX_FMT_NV16,
 875                 .name                   = "NV16",
 876                 .bits_per_sample        = 8,
 877                 .packing                = SOC_MBUS_PACKING_2X8_PADHI,
 878                 .order                  = SOC_MBUS_ORDER_LE,
 879                 .layout                 = SOC_MBUS_LAYOUT_PLANAR_Y_C,
 880         },
 881         {
 882                 .fourcc                 = V4L2_PIX_FMT_UYVY,
 883                 .name                   = "UYVY",
 884                 .bits_per_sample        = 16,
 885                 .packing                = SOC_MBUS_PACKING_NONE,
 886                 .order                  = SOC_MBUS_ORDER_LE,
 887                 .layout                 = SOC_MBUS_LAYOUT_PACKED,
 888         },
 889         {
 890                 .fourcc                 = V4L2_PIX_FMT_RGB565,
 891                 .name                   = "RGB565",
 892                 .bits_per_sample        = 16,
 893                 .packing                = SOC_MBUS_PACKING_NONE,
 894                 .order                  = SOC_MBUS_ORDER_LE,
 895                 .layout                 = SOC_MBUS_LAYOUT_PACKED,
 896         },
 897         {
 898                 .fourcc                 = V4L2_PIX_FMT_RGB555X,
 899                 .name                   = "ARGB1555",
 900                 .bits_per_sample        = 16,
 901                 .packing                = SOC_MBUS_PACKING_NONE,
 902                 .order                  = SOC_MBUS_ORDER_LE,
 903                 .layout                 = SOC_MBUS_LAYOUT_PACKED,
 904         },
 905         {
 906                 .fourcc                 = V4L2_PIX_FMT_RGB32,
 907                 .name                   = "RGB888",
 908                 .bits_per_sample        = 32,
 909                 .packing                = SOC_MBUS_PACKING_NONE,
 910                 .order                  = SOC_MBUS_ORDER_LE,
 911                 .layout                 = SOC_MBUS_LAYOUT_PACKED,
 912         },
 913 };
 914
 915 static int rcar_vin_get_formats(struct soc_camera_device *icd, unsigned int idx,
 916                                 struct soc_camera_format_xlate *xlate)
 917 {
 918         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
 919         struct device *dev = icd->parent;
 920         int ret, k, n;
 921         int formats = 0;
 922         struct rcar_vin_cam *cam;
 923         enum v4l2_mbus_pixelcode code;
 924         const struct soc_mbus_pixelfmt *fmt;
 925
 926         ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code);
 927         if (ret < 0)
 928                 return 0;
 929
 930         fmt = soc_mbus_get_fmtdesc(code);
 931         if (!fmt) {
 932                 dev_warn(dev, "unsupported format code #%u: %d\n", idx, code);
 933                 return 0;
 934         }
 935
 936         ret = rcar_vin_try_bus_param(icd, fmt->bits_per_sample);
 937         if (ret < 0)
 938                 return 0;
 939
 940         if (!icd->host_priv) {
 941                 struct v4l2_mbus_framefmt mf;
 942                 struct v4l2_rect rect;
 943                 struct device *dev = icd->parent;
 944                 int shift;
 945
 946                 ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
 947                 if (ret < 0)
 948                         return ret;
 949
 950                 /* Cache current client geometry */
 951                 ret = soc_camera_client_g_rect(sd, &rect);
 952                 if (ret == -ENOIOCTLCMD) {
 953                         /* Sensor driver doesn't support cropping */
 954                         rect.left = 0;
 955                         rect.top = 0;
 956                         rect.width = mf.width;
 957                         rect.height = mf.height;
 958                 } else if (ret < 0) {
 959                         return ret;
 960                 }
 961
 962                 /*
 963                  * If sensor proposes too large format then try smaller ones:
 964                  * 1280x960, 640x480, 320x240
 965                  */
 966                 for (shift = 0; shift < 3; shift++) {
 967                         if (mf.width <= VIN_MAX_WIDTH &&
 968                             mf.height <= VIN_MAX_HEIGHT)
 969                                 break;
 970
 971                         mf.width = 1280 >> shift;
 972                         mf.height = 960 >> shift;
 973                         ret = v4l2_device_call_until_err(sd->v4l2_dev,
 974                                                          soc_camera_grp_id(icd),
 975                                                          video, s_mbus_fmt,
 976                                                          &mf);
 977                         if (ret < 0)
 978                                 return ret;
 979                 }
 980
 981                 if (shift == 3) {
 982                         dev_err(dev,
 983                                 "Failed to configure the client below %ux%x\n",
 984                                 mf.width, mf.height);
 985                         return -EIO;
 986                 }
 987
 988                 dev_dbg(dev, "camera fmt %ux%u\n", mf.width, mf.height);
 989
 990                 cam = kzalloc(sizeof(*cam), GFP_KERNEL);
 991                 if (!cam)
 992                         return -ENOMEM;
 993                 /*
 994                  * We are called with current camera crop,
 995                  * initialise subrect with it
 996                  */
 997                 cam->rect = rect;
 998                 cam->subrect = rect;
 999                 cam->width = mf.width;
1000                 cam->height = mf.height;
1001
1002                 icd->host_priv = cam;
1003         } else {
1004                 cam = icd->host_priv;
1005         }
1006
1007         /* Beginning of a pass */
1008         if (!idx)
1009                 cam->extra_fmt = NULL;
1010
1011         switch (code) {
1012         case V4L2_MBUS_FMT_YUYV8_1X16:
1013         case V4L2_MBUS_FMT_YUYV8_2X8:
1014         case V4L2_MBUS_FMT_YUYV10_2X10:
1015                 if (cam->extra_fmt)
1016                         break;
1017
1018                 /* Add all our formats that can be generated by VIN */
1019                 cam->extra_fmt = rcar_vin_formats;
1020
1021                 n = ARRAY_SIZE(rcar_vin_formats);
1022                 formats += n;
1023                 for (k = 0; xlate && k < n; k++, xlate++) {
1024                         xlate->host_fmt = &rcar_vin_formats[k];
1025                         xlate->code = code;
1026                         dev_dbg(dev, "Providing format %s using code %d\n",
1027                                 rcar_vin_formats[k].name, code);
1028                 }
1029                 break;
1030         default:
1031                 if (!rcar_vin_packing_supported(fmt))
1032                         return 0;
1033
1034                 dev_dbg(dev, "Providing format %s in pass-through mode\n",
1035                         fmt->name);
1036                 break;
1037         }
1038
1039         /* Generic pass-through */
1040         formats++;
1041         if (xlate) {
1042                 xlate->host_fmt = fmt;
1043                 xlate->code = code;
1044                 xlate++;
1045         }
1046
1047         return formats;
1048 }
1049
1050 static void rcar_vin_put_formats(struct soc_camera_device *icd)
1051 {
1052         kfree(icd->host_priv);
1053         icd->host_priv = NULL;
1054 }
1055
1056 static int rcar_vin_set_crop(struct soc_camera_device *icd,
1057                              const struct v4l2_crop *a)
1058 {
1059         struct v4l2_crop a_writable = *a;
1060         const struct v4l2_rect *rect = &a_writable.c;
1061         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1062         struct rcar_vin_priv *priv = ici->priv;
1063         struct v4l2_crop cam_crop;
1064         struct rcar_vin_cam *cam = icd->host_priv;
1065         struct v4l2_rect *cam_rect = &cam_crop.c;
1066         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1067         struct device *dev = icd->parent;
1068         struct v4l2_mbus_framefmt mf;
1069         u32 vnmc;
1070         int ret, i;
1071
1072         dev_dbg(dev, "S_CROP(%ux%u@%u:%u)\n", rect->width, rect->height,
1073                 rect->left, rect->top);
1074
1075         /* During camera cropping its output window can change too, stop VIN */
1076         capture_stop_preserve(priv, &vnmc);
1077         dev_dbg(dev, "VNMC_REG 0x%x\n", vnmc);
1078
1079         /* Apply iterative camera S_CROP for new input window. */
1080         ret = soc_camera_client_s_crop(sd, &a_writable, &cam_crop,
1081                                        &cam->rect, &cam->subrect);
1082         if (ret < 0)
1083                 return ret;
1084
1085         dev_dbg(dev, "camera cropped to %ux%u@%u:%u\n",
1086                 cam_rect->width, cam_rect->height,
1087                 cam_rect->left, cam_rect->top);
1088
1089         /* On success cam_crop contains current camera crop */
1090
1091         /* Retrieve camera output window */
1092         ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
1093         if (ret < 0)
1094                 return ret;
1095
1096         if (mf.width > VIN_MAX_WIDTH || mf.height > VIN_MAX_HEIGHT)
1097                 return -EINVAL;
1098
1099         /* Cache camera output window */
1100         cam->width = mf.width;
1101         cam->height = mf.height;
1102
1103         icd->user_width  = cam->width;
1104         icd->user_height = cam->height;
1105
1106         cam->vin_left = rect->left & ~1;
1107         cam->vin_top = rect->top & ~1;
1108
1109         /* Use VIN cropping to crop to the new window. */
1110         ret = rcar_vin_set_rect(icd);
1111         if (ret < 0)
1112                 return ret;
1113
1114         cam->subrect = *rect;
1115
1116         dev_dbg(dev, "VIN cropped to %ux%u@%u:%u\n",
1117                 icd->user_width, icd->user_height,
1118                 cam->vin_left, cam->vin_top);
1119
1120         /* Restore capture */
1121         for (i = 0; i < MAX_BUFFER_NUM; i++) {
1122                 if (priv->queue_buf[i] && priv->state == STOPPED) {
1123                         vnmc |= VNMC_ME;
1124                         break;
1125                 }
1126         }
1127         capture_restore(priv, vnmc);
1128
1129         /* Even if only camera cropping succeeded */
1130         return ret;
1131 }
1132
1133 static int rcar_vin_get_crop(struct soc_camera_device *icd,
1134                              struct v4l2_crop *a)
1135 {
1136         struct rcar_vin_cam *cam = icd->host_priv;
1137
1138         a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1139         a->c = cam->subrect;
1140
1141         return 0;
1142 }
1143
1144 /* Similar to set_crop multistage iterative algorithm */
1145 static int rcar_vin_set_fmt(struct soc_camera_device *icd,
1146                             struct v4l2_format *f)
1147 {
1148         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1149         struct rcar_vin_priv *priv = ici->priv;
1150         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1151         struct rcar_vin_cam *cam = icd->host_priv;
1152         struct v4l2_pix_format *pix = &f->fmt.pix;
1153         struct v4l2_mbus_framefmt mf;
1154         struct device *dev = icd->parent;
1155         __u32 pixfmt = pix->pixelformat;
1156         const struct soc_camera_format_xlate *xlate;
1157         unsigned int vin_sub_width = 0, vin_sub_height = 0;
1158         int ret;
1159         bool can_scale;
1160         enum v4l2_field field;
1161         v4l2_std_id std;
1162
1163         dev_dbg(dev, "S_FMT(pix=0x%x, %ux%u)\n",
1164                 pixfmt, pix->width, pix->height);
1165
1166         switch (pix->field) {
1167         default:
1168                 pix->field = V4L2_FIELD_NONE;
1169                 /* fall-through */
1170         case V4L2_FIELD_NONE:
1171         case V4L2_FIELD_TOP:
1172         case V4L2_FIELD_BOTTOM:
1173         case V4L2_FIELD_INTERLACED_TB:
1174         case V4L2_FIELD_INTERLACED_BT:
1175                 field = pix->field;
1176                 break;
1177         case V4L2_FIELD_INTERLACED:
1178                 /* Query for standard if not explicitly mentioned _TB/_BT */
1179                 ret = v4l2_subdev_call(sd, video, querystd, &std);
1180                 if (ret < 0)
1181                         std = V4L2_STD_625_50;
1182
1183                 field = std & V4L2_STD_625_50 ? V4L2_FIELD_INTERLACED_TB :
1184                                                 V4L2_FIELD_INTERLACED_BT;
1185                 break;
1186         }
1187
1188         xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1189         if (!xlate) {
1190                 dev_warn(dev, "Format %x not found\n", pixfmt);
1191                 return -EINVAL;
1192         }
1193         /* Calculate client output geometry */
1194         soc_camera_calc_client_output(icd, &cam->rect, &cam->subrect, pix, &mf,
1195                                       12);
1196         mf.field = pix->field;
1197         mf.colorspace = pix->colorspace;
1198         mf.code  = xlate->code;
1199
1200         switch (pixfmt) {
1201         case V4L2_PIX_FMT_RGB32:
1202                 can_scale = priv->chip != RCAR_E1;
1203                 break;
1204         case V4L2_PIX_FMT_UYVY:
1205         case V4L2_PIX_FMT_YUYV:
1206         case V4L2_PIX_FMT_RGB565:
1207         case V4L2_PIX_FMT_RGB555X:
1208                 can_scale = true;
1209                 break;
1210         default:
1211                 can_scale = false;
1212                 break;
1213         }
1214
1215         dev_dbg(dev, "request camera output %ux%u\n", mf.width, mf.height);
1216
1217         ret = soc_camera_client_scale(icd, &cam->rect, &cam->subrect,
1218                                       &mf, &vin_sub_width, &vin_sub_height,
1219                                       can_scale, 12);
1220
1221         /* Done with the camera. Now see if we can improve the result */
1222         dev_dbg(dev, "Camera %d fmt %ux%u, requested %ux%u\n",
1223                 ret, mf.width, mf.height, pix->width, pix->height);
1224
1225         if (ret == -ENOIOCTLCMD)
1226                 dev_dbg(dev, "Sensor doesn't support scaling\n");
1227         else if (ret < 0)
1228                 return ret;
1229
1230         if (mf.code != xlate->code)
1231                 return -EINVAL;
1232
1233         /* Prepare VIN crop */
1234         cam->width = mf.width;
1235         cam->height = mf.height;
1236
1237         /* Use VIN scaling to scale to the requested user window. */
1238
1239         /* We cannot scale up */
1240         if (pix->width > vin_sub_width)
1241                 vin_sub_width = pix->width;
1242
1243         if (pix->height > vin_sub_height)
1244                 vin_sub_height = pix->height;
1245
1246         pix->colorspace = mf.colorspace;
1247
1248         if (!can_scale) {
1249                 pix->width = vin_sub_width;
1250                 pix->height = vin_sub_height;
1251         }
1252
1253         /*
1254          * We have calculated CFLCR, the actual configuration will be performed
1255          * in rcar_vin_set_bus_param()
1256          */
1257
1258         dev_dbg(dev, "W: %u : %u, H: %u : %u\n",
1259                 vin_sub_width, pix->width, vin_sub_height, pix->height);
1260
1261         icd->current_fmt = xlate;
1262
1263         priv->field = field;
1264
1265         return 0;
1266 }
1267
1268 static int rcar_vin_try_fmt(struct soc_camera_device *icd,
1269                             struct v4l2_format *f)
1270 {
1271         const struct soc_camera_format_xlate *xlate;
1272         struct v4l2_pix_format *pix = &f->fmt.pix;
1273         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1274         struct v4l2_mbus_framefmt mf;
1275         __u32 pixfmt = pix->pixelformat;
1276         int width, height;
1277         int ret;
1278
1279         xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1280         if (!xlate) {
1281                 xlate = icd->current_fmt;
1282                 dev_dbg(icd->parent, "Format %x not found, keeping %x\n",
1283                         pixfmt, xlate->host_fmt->fourcc);
1284                 pixfmt = xlate->host_fmt->fourcc;
1285                 pix->pixelformat = pixfmt;
1286                 pix->colorspace = icd->colorspace;
1287         }
1288
1289         /* FIXME: calculate using depth and bus width */
1290         v4l_bound_align_image(&pix->width, 2, VIN_MAX_WIDTH, 1,
1291                               &pix->height, 4, VIN_MAX_HEIGHT, 2, 0);
1292
1293         width = pix->width;
1294         height = pix->height;
1295
1296         /* let soc-camera calculate these values */
1297         pix->bytesperline = 0;
1298         pix->sizeimage = 0;
1299
1300         /* limit to sensor capabilities */
1301         mf.width = pix->width;
1302         mf.height = pix->height;
1303         mf.field = pix->field;
1304         mf.code = xlate->code;
1305         mf.colorspace = pix->colorspace;
1306
1307         ret = v4l2_device_call_until_err(sd->v4l2_dev, soc_camera_grp_id(icd),
1308                                          video, try_mbus_fmt, &mf);
1309         if (ret < 0)
1310                 return ret;
1311
1312         pix->width = mf.width;
1313         pix->height = mf.height;
1314         pix->field = mf.field;
1315         pix->colorspace = mf.colorspace;
1316
1317         if (pixfmt == V4L2_PIX_FMT_NV16) {
1318                 /* FIXME: check against rect_max after converting soc-camera */
1319                 /* We can scale precisely, need a bigger image from camera */
1320                 if (pix->width < width || pix->height < height) {
1321                         /*
1322                          * We presume, the sensor behaves sanely, i.e. if
1323                          * requested a bigger rectangle, it will not return a
1324                          * smaller one.
1325                          */
1326                         mf.width = VIN_MAX_WIDTH;
1327                         mf.height = VIN_MAX_HEIGHT;
1328                         ret = v4l2_device_call_until_err(sd->v4l2_dev,
1329                                                          soc_camera_grp_id(icd),
1330                                                          video, try_mbus_fmt,
1331                                                          &mf);
1332                         if (ret < 0) {
1333                                 dev_err(icd->parent,
1334                                         "client try_fmt() = %d\n", ret);
1335                                 return ret;
1336                         }
1337                 }
1338                 /* We will scale exactly */
1339                 if (mf.width > width)
1340                         pix->width = width;
1341                 if (mf.height > height)
1342                         pix->height = height;
1343         }
1344
1345         return ret;
1346 }
1347
1348 static unsigned int rcar_vin_poll(struct file *file, poll_table *pt)
1349 {
1350         struct soc_camera_device *icd = file->private_data;
1351
1352         return vb2_poll(&icd->vb2_vidq, file, pt);
1353 }
1354
1355 static int rcar_vin_querycap(struct soc_camera_host *ici,
1356                              struct v4l2_capability *cap)
1357 {
1358         strlcpy(cap->card, "R_Car_VIN", sizeof(cap->card));
1359         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1360         return 0;
1361 }
1362
1363 static int rcar_vin_init_videobuf2(struct vb2_queue *vq,
1364                                    struct soc_camera_device *icd)
1365 {
1366         vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1367         vq->io_modes = VB2_MMAP | VB2_USERPTR;
1368         vq->drv_priv = icd;
1369         vq->ops = &rcar_vin_vb2_ops;
1370         vq->mem_ops = &vb2_dma_contig_memops;
1371         vq->buf_struct_size = sizeof(struct rcar_vin_buffer);
1372         vq->timestamp_flags  = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1373
1374         return vb2_queue_init(vq);
1375 }
1376
1377 static struct soc_camera_host_ops rcar_vin_host_ops = {
1378         .owner          = THIS_MODULE,
1379         .add            = rcar_vin_add_device,
1380         .remove         = rcar_vin_remove_device,
1381         .clock_start    = rcar_vin_clock_start,
1382         .clock_stop     = rcar_vin_clock_stop,
1383         .get_formats    = rcar_vin_get_formats,
1384         .put_formats    = rcar_vin_put_formats,
1385         .get_crop       = rcar_vin_get_crop,
1386         .set_crop       = rcar_vin_set_crop,
1387         .try_fmt        = rcar_vin_try_fmt,
1388         .set_fmt        = rcar_vin_set_fmt,
1389         .poll           = rcar_vin_poll,
1390         .querycap       = rcar_vin_querycap,
1391         .set_bus_param  = rcar_vin_set_bus_param,
1392         .init_videobuf2 = rcar_vin_init_videobuf2,
1393 };
1394
1395 static struct platform_device_id rcar_vin_id_table[] = {
1396         { "r8a7791-vin",  RCAR_GEN2 },
1397         { "r8a7790-vin",  RCAR_GEN2 },
1398         { "r8a7779-vin",  RCAR_H1 },
1399         { "r8a7778-vin",  RCAR_M1 },
1400         { "uPD35004-vin", RCAR_E1 },
1401         {},
1402 };
1403 MODULE_DEVICE_TABLE(platform, rcar_vin_id_table);
1404
1405 static int rcar_vin_probe(struct platform_device *pdev)
1406 {
1407         struct rcar_vin_priv *priv;
1408         struct resource *mem;
1409         struct rcar_vin_platform_data *pdata;
1410         int irq, ret;
1411
1412         pdata = pdev->dev.platform_data;
1413         if (!pdata || !pdata->flags) {
1414                 dev_err(&pdev->dev, "platform data not set\n");
1415                 return -EINVAL;
1416         }
1417
1418         mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1419         if (mem == NULL)
1420                 return -EINVAL;
1421
1422         irq = platform_get_irq(pdev, 0);
1423         if (irq <= 0)
1424                 return -EINVAL;
1425
1426         priv = devm_kzalloc(&pdev->dev, sizeof(struct rcar_vin_priv),
1427                             GFP_KERNEL);
1428         if (!priv)
1429                 return -ENOMEM;
1430
1431         priv->base = devm_ioremap_resource(&pdev->dev, mem);
1432         if (IS_ERR(priv->base))
1433                 return PTR_ERR(priv->base);
1434
1435         ret = devm_request_irq(&pdev->dev, irq, rcar_vin_irq, IRQF_SHARED,
1436                                dev_name(&pdev->dev), priv);
1437         if (ret)
1438                 return ret;
1439
1440         priv->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
1441         if (IS_ERR(priv->alloc_ctx))
1442                 return PTR_ERR(priv->alloc_ctx);
1443
1444         priv->ici.priv = priv;
1445         priv->ici.v4l2_dev.dev = &pdev->dev;
1446         priv->ici.nr = pdev->id;
1447         priv->ici.drv_name = dev_name(&pdev->dev);
1448         priv->ici.ops = &rcar_vin_host_ops;
1449
1450         priv->pdata = pdata;
1451         priv->chip = pdev->id_entry->driver_data;
1452         spin_lock_init(&priv->lock);
1453         INIT_LIST_HEAD(&priv->capture);
1454
1455         priv->state = STOPPED;
1456
1457         pm_suspend_ignore_children(&pdev->dev, true);
1458         pm_runtime_enable(&pdev->dev);
1459
1460         ret = soc_camera_host_register(&priv->ici);
1461         if (ret)
1462                 goto cleanup;
1463
1464         return 0;
1465
1466 cleanup:
1467         pm_runtime_disable(&pdev->dev);
1468         vb2_dma_contig_cleanup_ctx(priv->alloc_ctx);
1469
1470         return ret;
1471 }
1472
1473 static int rcar_vin_remove(struct platform_device *pdev)
1474 {
1475         struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
1476         struct rcar_vin_priv *priv = container_of(soc_host,
1477                                                   struct rcar_vin_priv, ici);
1478
1479         soc_camera_host_unregister(soc_host);
1480         pm_runtime_disable(&pdev->dev);
1481         vb2_dma_contig_cleanup_ctx(priv->alloc_ctx);
1482
1483         return 0;
1484 }
1485
1486 static struct platform_driver rcar_vin_driver = {
1487         .probe          = rcar_vin_probe,
1488         .remove         = rcar_vin_remove,
1489         .driver         = {
1490                 .name           = DRV_NAME,
1491                 .owner          = THIS_MODULE,
1492         },
1493         .id_table       = rcar_vin_id_table,
1494 };
1495
1496 module_platform_driver(rcar_vin_driver);
1497
1498 MODULE_LICENSE("GPL");
1499 MODULE_ALIAS("platform:rcar_vin");
1500 MODULE_DESCRIPTION("Renesas R-Car VIN camera host driver");