linux/drivers/media/platform/s5p-g2d/g2d.c
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   1/*
   2 * Samsung S5P G2D - 2D Graphics Accelerator Driver
   3 *
   4 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
   5 * Kamil Debski, <k.debski@samsung.com>
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License as published by the
   9 * Free Software Foundation; either version 2 of the
  10 * License, or (at your option) any later version
  11 */
  12
  13#include <linux/module.h>
  14#include <linux/fs.h>
  15#include <linux/version.h>
  16#include <linux/timer.h>
  17#include <linux/sched.h>
  18#include <linux/slab.h>
  19#include <linux/clk.h>
  20#include <linux/interrupt.h>
  21#include <linux/of.h>
  22
  23#include <linux/platform_device.h>
  24#include <media/v4l2-mem2mem.h>
  25#include <media/v4l2-device.h>
  26#include <media/v4l2-ioctl.h>
  27#include <media/videobuf2-core.h>
  28#include <media/videobuf2-dma-contig.h>
  29
  30#include "g2d.h"
  31#include "g2d-regs.h"
  32
  33#define fh2ctx(__fh) container_of(__fh, struct g2d_ctx, fh)
  34
  35static struct g2d_fmt formats[] = {
  36        {
  37                .name   = "XRGB_8888",
  38                .fourcc = V4L2_PIX_FMT_RGB32,
  39                .depth  = 32,
  40                .hw     = COLOR_MODE(ORDER_XRGB, MODE_XRGB_8888),
  41        },
  42        {
  43                .name   = "RGB_565",
  44                .fourcc = V4L2_PIX_FMT_RGB565X,
  45                .depth  = 16,
  46                .hw     = COLOR_MODE(ORDER_XRGB, MODE_RGB_565),
  47        },
  48        {
  49                .name   = "XRGB_1555",
  50                .fourcc = V4L2_PIX_FMT_RGB555X,
  51                .depth  = 16,
  52                .hw     = COLOR_MODE(ORDER_XRGB, MODE_XRGB_1555),
  53        },
  54        {
  55                .name   = "XRGB_4444",
  56                .fourcc = V4L2_PIX_FMT_RGB444,
  57                .depth  = 16,
  58                .hw     = COLOR_MODE(ORDER_XRGB, MODE_XRGB_4444),
  59        },
  60        {
  61                .name   = "PACKED_RGB_888",
  62                .fourcc = V4L2_PIX_FMT_RGB24,
  63                .depth  = 24,
  64                .hw     = COLOR_MODE(ORDER_XRGB, MODE_PACKED_RGB_888),
  65        },
  66};
  67#define NUM_FORMATS ARRAY_SIZE(formats)
  68
  69static struct g2d_frame def_frame = {
  70        .width          = DEFAULT_WIDTH,
  71        .height         = DEFAULT_HEIGHT,
  72        .c_width        = DEFAULT_WIDTH,
  73        .c_height       = DEFAULT_HEIGHT,
  74        .o_width        = 0,
  75        .o_height       = 0,
  76        .fmt            = &formats[0],
  77        .right          = DEFAULT_WIDTH,
  78        .bottom         = DEFAULT_HEIGHT,
  79};
  80
  81static struct g2d_fmt *find_fmt(struct v4l2_format *f)
  82{
  83        unsigned int i;
  84        for (i = 0; i < NUM_FORMATS; i++) {
  85                if (formats[i].fourcc == f->fmt.pix.pixelformat)
  86                        return &formats[i];
  87        }
  88        return NULL;
  89}
  90
  91
  92static struct g2d_frame *get_frame(struct g2d_ctx *ctx,
  93                                                        enum v4l2_buf_type type)
  94{
  95        switch (type) {
  96        case V4L2_BUF_TYPE_VIDEO_OUTPUT:
  97                return &ctx->in;
  98        case V4L2_BUF_TYPE_VIDEO_CAPTURE:
  99                return &ctx->out;
 100        default:
 101                return ERR_PTR(-EINVAL);
 102        }
 103}
 104
 105static int g2d_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
 106                           unsigned int *nbuffers, unsigned int *nplanes,
 107                           unsigned int sizes[], void *alloc_ctxs[])
 108{
 109        struct g2d_ctx *ctx = vb2_get_drv_priv(vq);
 110        struct g2d_frame *f = get_frame(ctx, vq->type);
 111
 112        if (IS_ERR(f))
 113                return PTR_ERR(f);
 114
 115        sizes[0] = f->size;
 116        *nplanes = 1;
 117        alloc_ctxs[0] = ctx->dev->alloc_ctx;
 118
 119        if (*nbuffers == 0)
 120                *nbuffers = 1;
 121
 122        return 0;
 123}
 124
 125static int g2d_buf_prepare(struct vb2_buffer *vb)
 126{
 127        struct g2d_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
 128        struct g2d_frame *f = get_frame(ctx, vb->vb2_queue->type);
 129
 130        if (IS_ERR(f))
 131                return PTR_ERR(f);
 132        vb2_set_plane_payload(vb, 0, f->size);
 133        return 0;
 134}
 135
 136static void g2d_buf_queue(struct vb2_buffer *vb)
 137{
 138        struct g2d_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
 139        v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
 140}
 141
 142
 143static struct vb2_ops g2d_qops = {
 144        .queue_setup    = g2d_queue_setup,
 145        .buf_prepare    = g2d_buf_prepare,
 146        .buf_queue      = g2d_buf_queue,
 147};
 148
 149static int queue_init(void *priv, struct vb2_queue *src_vq,
 150                                                struct vb2_queue *dst_vq)
 151{
 152        struct g2d_ctx *ctx = priv;
 153        int ret;
 154
 155        src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 156        src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
 157        src_vq->drv_priv = ctx;
 158        src_vq->ops = &g2d_qops;
 159        src_vq->mem_ops = &vb2_dma_contig_memops;
 160        src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
 161        src_vq->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_COPY;
 162
 163        ret = vb2_queue_init(src_vq);
 164        if (ret)
 165                return ret;
 166
 167        dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 168        dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
 169        dst_vq->drv_priv = ctx;
 170        dst_vq->ops = &g2d_qops;
 171        dst_vq->mem_ops = &vb2_dma_contig_memops;
 172        dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
 173        dst_vq->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_COPY;
 174
 175        return vb2_queue_init(dst_vq);
 176}
 177
 178static int g2d_s_ctrl(struct v4l2_ctrl *ctrl)
 179{
 180        struct g2d_ctx *ctx = container_of(ctrl->handler, struct g2d_ctx,
 181                                                                ctrl_handler);
 182        unsigned long flags;
 183
 184        spin_lock_irqsave(&ctx->dev->ctrl_lock, flags);
 185        switch (ctrl->id) {
 186        case V4L2_CID_COLORFX:
 187                if (ctrl->val == V4L2_COLORFX_NEGATIVE)
 188                        ctx->rop = ROP4_INVERT;
 189                else
 190                        ctx->rop = ROP4_COPY;
 191                break;
 192
 193        case V4L2_CID_HFLIP:
 194                ctx->flip = ctx->ctrl_hflip->val | (ctx->ctrl_vflip->val << 1);
 195                break;
 196
 197        }
 198        spin_unlock_irqrestore(&ctx->dev->ctrl_lock, flags);
 199        return 0;
 200}
 201
 202static const struct v4l2_ctrl_ops g2d_ctrl_ops = {
 203        .s_ctrl         = g2d_s_ctrl,
 204};
 205
 206static int g2d_setup_ctrls(struct g2d_ctx *ctx)
 207{
 208        struct g2d_dev *dev = ctx->dev;
 209
 210        v4l2_ctrl_handler_init(&ctx->ctrl_handler, 3);
 211
 212        ctx->ctrl_hflip = v4l2_ctrl_new_std(&ctx->ctrl_handler, &g2d_ctrl_ops,
 213                                                V4L2_CID_HFLIP, 0, 1, 1, 0);
 214
 215        ctx->ctrl_vflip = v4l2_ctrl_new_std(&ctx->ctrl_handler, &g2d_ctrl_ops,
 216                                                V4L2_CID_VFLIP, 0, 1, 1, 0);
 217
 218        v4l2_ctrl_new_std_menu(
 219                &ctx->ctrl_handler,
 220                &g2d_ctrl_ops,
 221                V4L2_CID_COLORFX,
 222                V4L2_COLORFX_NEGATIVE,
 223                ~((1 << V4L2_COLORFX_NONE) | (1 << V4L2_COLORFX_NEGATIVE)),
 224                V4L2_COLORFX_NONE);
 225
 226        if (ctx->ctrl_handler.error) {
 227                int err = ctx->ctrl_handler.error;
 228                v4l2_err(&dev->v4l2_dev, "g2d_setup_ctrls failed\n");
 229                v4l2_ctrl_handler_free(&ctx->ctrl_handler);
 230                return err;
 231        }
 232
 233        v4l2_ctrl_cluster(2, &ctx->ctrl_hflip);
 234
 235        return 0;
 236}
 237
 238static int g2d_open(struct file *file)
 239{
 240        struct g2d_dev *dev = video_drvdata(file);
 241        struct g2d_ctx *ctx = NULL;
 242        int ret = 0;
 243
 244        ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 245        if (!ctx)
 246                return -ENOMEM;
 247        ctx->dev = dev;
 248        /* Set default formats */
 249        ctx->in         = def_frame;
 250        ctx->out        = def_frame;
 251
 252        if (mutex_lock_interruptible(&dev->mutex)) {
 253                kfree(ctx);
 254                return -ERESTARTSYS;
 255        }
 256        ctx->m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx, &queue_init);
 257        if (IS_ERR(ctx->m2m_ctx)) {
 258                ret = PTR_ERR(ctx->m2m_ctx);
 259                mutex_unlock(&dev->mutex);
 260                kfree(ctx);
 261                return ret;
 262        }
 263        v4l2_fh_init(&ctx->fh, video_devdata(file));
 264        file->private_data = &ctx->fh;
 265        v4l2_fh_add(&ctx->fh);
 266
 267        g2d_setup_ctrls(ctx);
 268
 269        /* Write the default values to the ctx struct */
 270        v4l2_ctrl_handler_setup(&ctx->ctrl_handler);
 271
 272        ctx->fh.ctrl_handler = &ctx->ctrl_handler;
 273        mutex_unlock(&dev->mutex);
 274
 275        v4l2_info(&dev->v4l2_dev, "instance opened\n");
 276        return 0;
 277}
 278
 279static int g2d_release(struct file *file)
 280{
 281        struct g2d_dev *dev = video_drvdata(file);
 282        struct g2d_ctx *ctx = fh2ctx(file->private_data);
 283
 284        v4l2_ctrl_handler_free(&ctx->ctrl_handler);
 285        v4l2_fh_del(&ctx->fh);
 286        v4l2_fh_exit(&ctx->fh);
 287        kfree(ctx);
 288        v4l2_info(&dev->v4l2_dev, "instance closed\n");
 289        return 0;
 290}
 291
 292
 293static int vidioc_querycap(struct file *file, void *priv,
 294                                struct v4l2_capability *cap)
 295{
 296        strncpy(cap->driver, G2D_NAME, sizeof(cap->driver) - 1);
 297        strncpy(cap->card, G2D_NAME, sizeof(cap->card) - 1);
 298        cap->bus_info[0] = 0;
 299        cap->version = KERNEL_VERSION(1, 0, 0);
 300        /*
 301         * This is only a mem-to-mem video device. The capture and output
 302         * device capability flags are left only for backward compatibility
 303         * and are scheduled for removal.
 304         */
 305        cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT |
 306                            V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
 307        return 0;
 308}
 309
 310static int vidioc_enum_fmt(struct file *file, void *prv, struct v4l2_fmtdesc *f)
 311{
 312        struct g2d_fmt *fmt;
 313        if (f->index >= NUM_FORMATS)
 314                return -EINVAL;
 315        fmt = &formats[f->index];
 316        f->pixelformat = fmt->fourcc;
 317        strncpy(f->description, fmt->name, sizeof(f->description) - 1);
 318        return 0;
 319}
 320
 321static int vidioc_g_fmt(struct file *file, void *prv, struct v4l2_format *f)
 322{
 323        struct g2d_ctx *ctx = prv;
 324        struct vb2_queue *vq;
 325        struct g2d_frame *frm;
 326
 327        vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
 328        if (!vq)
 329                return -EINVAL;
 330        frm = get_frame(ctx, f->type);
 331        if (IS_ERR(frm))
 332                return PTR_ERR(frm);
 333
 334        f->fmt.pix.width                = frm->width;
 335        f->fmt.pix.height               = frm->height;
 336        f->fmt.pix.field                = V4L2_FIELD_NONE;
 337        f->fmt.pix.pixelformat          = frm->fmt->fourcc;
 338        f->fmt.pix.bytesperline         = (frm->width * frm->fmt->depth) >> 3;
 339        f->fmt.pix.sizeimage            = frm->size;
 340        return 0;
 341}
 342
 343static int vidioc_try_fmt(struct file *file, void *prv, struct v4l2_format *f)
 344{
 345        struct g2d_fmt *fmt;
 346        enum v4l2_field *field;
 347
 348        fmt = find_fmt(f);
 349        if (!fmt)
 350                return -EINVAL;
 351
 352        field = &f->fmt.pix.field;
 353        if (*field == V4L2_FIELD_ANY)
 354                *field = V4L2_FIELD_NONE;
 355        else if (*field != V4L2_FIELD_NONE)
 356                return -EINVAL;
 357
 358        if (f->fmt.pix.width > MAX_WIDTH)
 359                f->fmt.pix.width = MAX_WIDTH;
 360        if (f->fmt.pix.height > MAX_HEIGHT)
 361                f->fmt.pix.height = MAX_HEIGHT;
 362
 363        if (f->fmt.pix.width < 1)
 364                f->fmt.pix.width = 1;
 365        if (f->fmt.pix.height < 1)
 366                f->fmt.pix.height = 1;
 367
 368        f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
 369        f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
 370        return 0;
 371}
 372
 373static int vidioc_s_fmt(struct file *file, void *prv, struct v4l2_format *f)
 374{
 375        struct g2d_ctx *ctx = prv;
 376        struct g2d_dev *dev = ctx->dev;
 377        struct vb2_queue *vq;
 378        struct g2d_frame *frm;
 379        struct g2d_fmt *fmt;
 380        int ret = 0;
 381
 382        /* Adjust all values accordingly to the hardware capabilities
 383         * and chosen format. */
 384        ret = vidioc_try_fmt(file, prv, f);
 385        if (ret)
 386                return ret;
 387        vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
 388        if (vb2_is_busy(vq)) {
 389                v4l2_err(&dev->v4l2_dev, "queue (%d) bust\n", f->type);
 390                return -EBUSY;
 391        }
 392        frm = get_frame(ctx, f->type);
 393        if (IS_ERR(frm))
 394                return PTR_ERR(frm);
 395        fmt = find_fmt(f);
 396        if (!fmt)
 397                return -EINVAL;
 398        frm->width      = f->fmt.pix.width;
 399        frm->height     = f->fmt.pix.height;
 400        frm->size       = f->fmt.pix.sizeimage;
 401        /* Reset crop settings */
 402        frm->o_width    = 0;
 403        frm->o_height   = 0;
 404        frm->c_width    = frm->width;
 405        frm->c_height   = frm->height;
 406        frm->right      = frm->width;
 407        frm->bottom     = frm->height;
 408        frm->fmt        = fmt;
 409        frm->stride     = f->fmt.pix.bytesperline;
 410        return 0;
 411}
 412
 413static unsigned int g2d_poll(struct file *file, struct poll_table_struct *wait)
 414{
 415        struct g2d_ctx *ctx = fh2ctx(file->private_data);
 416        struct g2d_dev *dev = ctx->dev;
 417        unsigned int res;
 418
 419        mutex_lock(&dev->mutex);
 420        res = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
 421        mutex_unlock(&dev->mutex);
 422        return res;
 423}
 424
 425static int g2d_mmap(struct file *file, struct vm_area_struct *vma)
 426{
 427        struct g2d_ctx *ctx = fh2ctx(file->private_data);
 428        struct g2d_dev *dev = ctx->dev;
 429        int ret;
 430
 431        if (mutex_lock_interruptible(&dev->mutex))
 432                return -ERESTARTSYS;
 433        ret = v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
 434        mutex_unlock(&dev->mutex);
 435        return ret;
 436}
 437
 438static int vidioc_reqbufs(struct file *file, void *priv,
 439                        struct v4l2_requestbuffers *reqbufs)
 440{
 441        struct g2d_ctx *ctx = priv;
 442        return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
 443}
 444
 445static int vidioc_querybuf(struct file *file, void *priv,
 446                        struct v4l2_buffer *buf)
 447{
 448        struct g2d_ctx *ctx = priv;
 449        return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
 450}
 451
 452static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
 453{
 454        struct g2d_ctx *ctx = priv;
 455        return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
 456}
 457
 458static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
 459{
 460        struct g2d_ctx *ctx = priv;
 461        return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
 462}
 463
 464
 465static int vidioc_streamon(struct file *file, void *priv,
 466                                        enum v4l2_buf_type type)
 467{
 468        struct g2d_ctx *ctx = priv;
 469        return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
 470}
 471
 472static int vidioc_streamoff(struct file *file, void *priv,
 473                                        enum v4l2_buf_type type)
 474{
 475        struct g2d_ctx *ctx = priv;
 476        return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
 477}
 478
 479static int vidioc_cropcap(struct file *file, void *priv,
 480                                        struct v4l2_cropcap *cr)
 481{
 482        struct g2d_ctx *ctx = priv;
 483        struct g2d_frame *f;
 484
 485        f = get_frame(ctx, cr->type);
 486        if (IS_ERR(f))
 487                return PTR_ERR(f);
 488
 489        cr->bounds.left         = 0;
 490        cr->bounds.top          = 0;
 491        cr->bounds.width        = f->width;
 492        cr->bounds.height       = f->height;
 493        cr->defrect             = cr->bounds;
 494        return 0;
 495}
 496
 497static int vidioc_g_crop(struct file *file, void *prv, struct v4l2_crop *cr)
 498{
 499        struct g2d_ctx *ctx = prv;
 500        struct g2d_frame *f;
 501
 502        f = get_frame(ctx, cr->type);
 503        if (IS_ERR(f))
 504                return PTR_ERR(f);
 505
 506        cr->c.left      = f->o_height;
 507        cr->c.top       = f->o_width;
 508        cr->c.width     = f->c_width;
 509        cr->c.height    = f->c_height;
 510        return 0;
 511}
 512
 513static int vidioc_try_crop(struct file *file, void *prv, const struct v4l2_crop *cr)
 514{
 515        struct g2d_ctx *ctx = prv;
 516        struct g2d_dev *dev = ctx->dev;
 517        struct g2d_frame *f;
 518
 519        f = get_frame(ctx, cr->type);
 520        if (IS_ERR(f))
 521                return PTR_ERR(f);
 522
 523        if (cr->c.top < 0 || cr->c.left < 0) {
 524                v4l2_err(&dev->v4l2_dev,
 525                        "doesn't support negative values for top & left\n");
 526                return -EINVAL;
 527        }
 528
 529        return 0;
 530}
 531
 532static int vidioc_s_crop(struct file *file, void *prv, const struct v4l2_crop *cr)
 533{
 534        struct g2d_ctx *ctx = prv;
 535        struct g2d_frame *f;
 536        int ret;
 537
 538        ret = vidioc_try_crop(file, prv, cr);
 539        if (ret)
 540                return ret;
 541        f = get_frame(ctx, cr->type);
 542        if (IS_ERR(f))
 543                return PTR_ERR(f);
 544
 545        f->c_width      = cr->c.width;
 546        f->c_height     = cr->c.height;
 547        f->o_width      = cr->c.left;
 548        f->o_height     = cr->c.top;
 549        f->bottom       = f->o_height + f->c_height;
 550        f->right        = f->o_width + f->c_width;
 551        return 0;
 552}
 553
 554static void g2d_lock(void *prv)
 555{
 556        struct g2d_ctx *ctx = prv;
 557        struct g2d_dev *dev = ctx->dev;
 558        mutex_lock(&dev->mutex);
 559}
 560
 561static void g2d_unlock(void *prv)
 562{
 563        struct g2d_ctx *ctx = prv;
 564        struct g2d_dev *dev = ctx->dev;
 565        mutex_unlock(&dev->mutex);
 566}
 567
 568static void job_abort(void *prv)
 569{
 570        struct g2d_ctx *ctx = prv;
 571        struct g2d_dev *dev = ctx->dev;
 572        int ret;
 573
 574        if (dev->curr == NULL) /* No job currently running */
 575                return;
 576
 577        ret = wait_event_timeout(dev->irq_queue,
 578                dev->curr == NULL,
 579                msecs_to_jiffies(G2D_TIMEOUT));
 580}
 581
 582static void device_run(void *prv)
 583{
 584        struct g2d_ctx *ctx = prv;
 585        struct g2d_dev *dev = ctx->dev;
 586        struct vb2_buffer *src, *dst;
 587        unsigned long flags;
 588        u32 cmd = 0;
 589
 590        dev->curr = ctx;
 591
 592        src = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
 593        dst = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
 594
 595        clk_enable(dev->gate);
 596        g2d_reset(dev);
 597
 598        spin_lock_irqsave(&dev->ctrl_lock, flags);
 599
 600        g2d_set_src_size(dev, &ctx->in);
 601        g2d_set_src_addr(dev, vb2_dma_contig_plane_dma_addr(src, 0));
 602
 603        g2d_set_dst_size(dev, &ctx->out);
 604        g2d_set_dst_addr(dev, vb2_dma_contig_plane_dma_addr(dst, 0));
 605
 606        g2d_set_rop4(dev, ctx->rop);
 607        g2d_set_flip(dev, ctx->flip);
 608
 609        if (ctx->in.c_width != ctx->out.c_width ||
 610                ctx->in.c_height != ctx->out.c_height) {
 611                if (dev->variant->hw_rev == TYPE_G2D_3X)
 612                        cmd |= CMD_V3_ENABLE_STRETCH;
 613                else
 614                        g2d_set_v41_stretch(dev, &ctx->in, &ctx->out);
 615        }
 616
 617        g2d_set_cmd(dev, cmd);
 618        g2d_start(dev);
 619
 620        spin_unlock_irqrestore(&dev->ctrl_lock, flags);
 621}
 622
 623static irqreturn_t g2d_isr(int irq, void *prv)
 624{
 625        struct g2d_dev *dev = prv;
 626        struct g2d_ctx *ctx = dev->curr;
 627        struct vb2_buffer *src, *dst;
 628
 629        g2d_clear_int(dev);
 630        clk_disable(dev->gate);
 631
 632        BUG_ON(ctx == NULL);
 633
 634        src = v4l2_m2m_src_buf_remove(ctx->m2m_ctx);
 635        dst = v4l2_m2m_dst_buf_remove(ctx->m2m_ctx);
 636
 637        BUG_ON(src == NULL);
 638        BUG_ON(dst == NULL);
 639
 640        dst->v4l2_buf.timecode = src->v4l2_buf.timecode;
 641        dst->v4l2_buf.timestamp = src->v4l2_buf.timestamp;
 642
 643        v4l2_m2m_buf_done(src, VB2_BUF_STATE_DONE);
 644        v4l2_m2m_buf_done(dst, VB2_BUF_STATE_DONE);
 645        v4l2_m2m_job_finish(dev->m2m_dev, ctx->m2m_ctx);
 646
 647        dev->curr = NULL;
 648        wake_up(&dev->irq_queue);
 649        return IRQ_HANDLED;
 650}
 651
 652static const struct v4l2_file_operations g2d_fops = {
 653        .owner          = THIS_MODULE,
 654        .open           = g2d_open,
 655        .release        = g2d_release,
 656        .poll           = g2d_poll,
 657        .unlocked_ioctl = video_ioctl2,
 658        .mmap           = g2d_mmap,
 659};
 660
 661static const struct v4l2_ioctl_ops g2d_ioctl_ops = {
 662        .vidioc_querycap        = vidioc_querycap,
 663
 664        .vidioc_enum_fmt_vid_cap        = vidioc_enum_fmt,
 665        .vidioc_g_fmt_vid_cap           = vidioc_g_fmt,
 666        .vidioc_try_fmt_vid_cap         = vidioc_try_fmt,
 667        .vidioc_s_fmt_vid_cap           = vidioc_s_fmt,
 668
 669        .vidioc_enum_fmt_vid_out        = vidioc_enum_fmt,
 670        .vidioc_g_fmt_vid_out           = vidioc_g_fmt,
 671        .vidioc_try_fmt_vid_out         = vidioc_try_fmt,
 672        .vidioc_s_fmt_vid_out           = vidioc_s_fmt,
 673
 674        .vidioc_reqbufs                 = vidioc_reqbufs,
 675        .vidioc_querybuf                = vidioc_querybuf,
 676
 677        .vidioc_qbuf                    = vidioc_qbuf,
 678        .vidioc_dqbuf                   = vidioc_dqbuf,
 679
 680        .vidioc_streamon                = vidioc_streamon,
 681        .vidioc_streamoff               = vidioc_streamoff,
 682
 683        .vidioc_g_crop                  = vidioc_g_crop,
 684        .vidioc_s_crop                  = vidioc_s_crop,
 685        .vidioc_cropcap                 = vidioc_cropcap,
 686};
 687
 688static struct video_device g2d_videodev = {
 689        .name           = G2D_NAME,
 690        .fops           = &g2d_fops,
 691        .ioctl_ops      = &g2d_ioctl_ops,
 692        .minor          = -1,
 693        .release        = video_device_release,
 694        .vfl_dir        = VFL_DIR_M2M,
 695};
 696
 697static struct v4l2_m2m_ops g2d_m2m_ops = {
 698        .device_run     = device_run,
 699        .job_abort      = job_abort,
 700        .lock           = g2d_lock,
 701        .unlock         = g2d_unlock,
 702};
 703
 704static const struct of_device_id exynos_g2d_match[];
 705
 706static int g2d_probe(struct platform_device *pdev)
 707{
 708        struct g2d_dev *dev;
 709        struct video_device *vfd;
 710        struct resource *res;
 711        const struct of_device_id *of_id;
 712        int ret = 0;
 713
 714        dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
 715        if (!dev)
 716                return -ENOMEM;
 717
 718        spin_lock_init(&dev->ctrl_lock);
 719        mutex_init(&dev->mutex);
 720        atomic_set(&dev->num_inst, 0);
 721        init_waitqueue_head(&dev->irq_queue);
 722
 723        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 724
 725        dev->regs = devm_ioremap_resource(&pdev->dev, res);
 726        if (IS_ERR(dev->regs))
 727                return PTR_ERR(dev->regs);
 728
 729        dev->clk = clk_get(&pdev->dev, "sclk_fimg2d");
 730        if (IS_ERR(dev->clk)) {
 731                dev_err(&pdev->dev, "failed to get g2d clock\n");
 732                return -ENXIO;
 733        }
 734
 735        ret = clk_prepare(dev->clk);
 736        if (ret) {
 737                dev_err(&pdev->dev, "failed to prepare g2d clock\n");
 738                goto put_clk;
 739        }
 740
 741        dev->gate = clk_get(&pdev->dev, "fimg2d");
 742        if (IS_ERR(dev->gate)) {
 743                dev_err(&pdev->dev, "failed to get g2d clock gate\n");
 744                ret = -ENXIO;
 745                goto unprep_clk;
 746        }
 747
 748        ret = clk_prepare(dev->gate);
 749        if (ret) {
 750                dev_err(&pdev->dev, "failed to prepare g2d clock gate\n");
 751                goto put_clk_gate;
 752        }
 753
 754        res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 755        if (!res) {
 756                dev_err(&pdev->dev, "failed to find IRQ\n");
 757                ret = -ENXIO;
 758                goto unprep_clk_gate;
 759        }
 760
 761        dev->irq = res->start;
 762
 763        ret = devm_request_irq(&pdev->dev, dev->irq, g2d_isr,
 764                                                0, pdev->name, dev);
 765        if (ret) {
 766                dev_err(&pdev->dev, "failed to install IRQ\n");
 767                goto put_clk_gate;
 768        }
 769
 770        dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
 771        if (IS_ERR(dev->alloc_ctx)) {
 772                ret = PTR_ERR(dev->alloc_ctx);
 773                goto unprep_clk_gate;
 774        }
 775
 776        ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
 777        if (ret)
 778                goto alloc_ctx_cleanup;
 779        vfd = video_device_alloc();
 780        if (!vfd) {
 781                v4l2_err(&dev->v4l2_dev, "Failed to allocate video device\n");
 782                ret = -ENOMEM;
 783                goto unreg_v4l2_dev;
 784        }
 785        *vfd = g2d_videodev;
 786        vfd->lock = &dev->mutex;
 787        vfd->v4l2_dev = &dev->v4l2_dev;
 788        ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
 789        if (ret) {
 790                v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
 791                goto rel_vdev;
 792        }
 793        video_set_drvdata(vfd, dev);
 794        snprintf(vfd->name, sizeof(vfd->name), "%s", g2d_videodev.name);
 795        dev->vfd = vfd;
 796        v4l2_info(&dev->v4l2_dev, "device registered as /dev/video%d\n",
 797                                                                vfd->num);
 798        platform_set_drvdata(pdev, dev);
 799        dev->m2m_dev = v4l2_m2m_init(&g2d_m2m_ops);
 800        if (IS_ERR(dev->m2m_dev)) {
 801                v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem device\n");
 802                ret = PTR_ERR(dev->m2m_dev);
 803                goto unreg_video_dev;
 804        }
 805
 806        def_frame.stride = (def_frame.width * def_frame.fmt->depth) >> 3;
 807
 808        if (!pdev->dev.of_node) {
 809                dev->variant = g2d_get_drv_data(pdev);
 810        } else {
 811                of_id = of_match_node(exynos_g2d_match, pdev->dev.of_node);
 812                if (!of_id) {
 813                        ret = -ENODEV;
 814                        goto unreg_video_dev;
 815                }
 816                dev->variant = (struct g2d_variant *)of_id->data;
 817        }
 818
 819        return 0;
 820
 821unreg_video_dev:
 822        video_unregister_device(dev->vfd);
 823rel_vdev:
 824        video_device_release(vfd);
 825unreg_v4l2_dev:
 826        v4l2_device_unregister(&dev->v4l2_dev);
 827alloc_ctx_cleanup:
 828        vb2_dma_contig_cleanup_ctx(dev->alloc_ctx);
 829unprep_clk_gate:
 830        clk_unprepare(dev->gate);
 831put_clk_gate:
 832        clk_put(dev->gate);
 833unprep_clk:
 834        clk_unprepare(dev->clk);
 835put_clk:
 836        clk_put(dev->clk);
 837
 838        return ret;
 839}
 840
 841static int g2d_remove(struct platform_device *pdev)
 842{
 843        struct g2d_dev *dev = (struct g2d_dev *)platform_get_drvdata(pdev);
 844
 845        v4l2_info(&dev->v4l2_dev, "Removing " G2D_NAME);
 846        v4l2_m2m_release(dev->m2m_dev);
 847        video_unregister_device(dev->vfd);
 848        v4l2_device_unregister(&dev->v4l2_dev);
 849        vb2_dma_contig_cleanup_ctx(dev->alloc_ctx);
 850        clk_unprepare(dev->gate);
 851        clk_put(dev->gate);
 852        clk_unprepare(dev->clk);
 853        clk_put(dev->clk);
 854        return 0;
 855}
 856
 857static struct g2d_variant g2d_drvdata_v3x = {
 858        .hw_rev = TYPE_G2D_3X, /* Revision 3.0 for S5PV210 and Exynos4210 */
 859};
 860
 861static struct g2d_variant g2d_drvdata_v4x = {
 862        .hw_rev = TYPE_G2D_4X, /* Revision 4.1 for Exynos4X12 and Exynos5 */
 863};
 864
 865static const struct of_device_id exynos_g2d_match[] = {
 866        {
 867                .compatible = "samsung,s5pv210-g2d",
 868                .data = &g2d_drvdata_v3x,
 869        }, {
 870                .compatible = "samsung,exynos4212-g2d",
 871                .data = &g2d_drvdata_v4x,
 872        },
 873        {},
 874};
 875MODULE_DEVICE_TABLE(of, exynos_g2d_match);
 876
 877static struct platform_device_id g2d_driver_ids[] = {
 878        {
 879                .name = "s5p-g2d",
 880                .driver_data = (unsigned long)&g2d_drvdata_v3x,
 881        }, {
 882                .name = "s5p-g2d-v4x",
 883                .driver_data = (unsigned long)&g2d_drvdata_v4x,
 884        },
 885        {},
 886};
 887MODULE_DEVICE_TABLE(platform, g2d_driver_ids);
 888
 889static struct platform_driver g2d_pdrv = {
 890        .probe          = g2d_probe,
 891        .remove         = g2d_remove,
 892        .id_table       = g2d_driver_ids,
 893        .driver         = {
 894                .name = G2D_NAME,
 895                .owner = THIS_MODULE,
 896                .of_match_table = exynos_g2d_match,
 897        },
 898};
 899
 900module_platform_driver(g2d_pdrv);
 901
 902MODULE_AUTHOR("Kamil Debski <k.debski@samsung.com>");
 903MODULE_DESCRIPTION("S5P G2D 2d graphics accelerator driver");
 904MODULE_LICENSE("GPL");
 905