drivers/media/pci/dt3155/dt3155.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /***************************************************************************
   3  *   Copyright (C) 2006-2010 by Marin Mitov                                *
   4  *   mitov@issp.bas.bg                                                     *
   5  *                                                                         *
   6  *                                                                         *
   7  ***************************************************************************/
   8
   9 #include <linux/module.h>
  10 #include <linux/stringify.h>
  11 #include <linux/delay.h>
  12 #include <linux/kthread.h>
  13 #include <linux/slab.h>
  14 #include <media/v4l2-dev.h>
  15 #include <media/v4l2-ioctl.h>
  16 #include <media/v4l2-common.h>
  17 #include <media/videobuf2-dma-contig.h>
  18
  19 #include "dt3155.h"
  20
  21 #define DT3155_DEVICE_ID 0x1223
  22
  23 /**
  24  * read_i2c_reg - reads an internal i2c register
  25  *
  26  * @addr:       dt3155 mmio base address
  27  * @index:      index (internal address) of register to read
  28  * @data:       pointer to byte the read data will be placed in
  29  *
  30  * returns:     zero on success or error code
  31  *
  32  * This function starts reading the specified (by index) register
  33  * and busy waits for the process to finish. The result is placed
  34  * in a byte pointed by data.
  35  */
  36 static int read_i2c_reg(void __iomem *addr, u8 index, u8 *data)
  37 {
  38         u32 tmp = index;
  39
  40         iowrite32((tmp << 17) | IIC_READ, addr + IIC_CSR2);
  41         udelay(45); /* wait at least 43 usec for NEW_CYCLE to clear */
  42         if (ioread32(addr + IIC_CSR2) & NEW_CYCLE)
  43                 return -EIO; /* error: NEW_CYCLE not cleared */
  44         tmp = ioread32(addr + IIC_CSR1);
  45         if (tmp & DIRECT_ABORT) {
  46                 /* reset DIRECT_ABORT bit */
  47                 iowrite32(DIRECT_ABORT, addr + IIC_CSR1);
  48                 return -EIO; /* error: DIRECT_ABORT set */
  49         }
  50         *data = tmp >> 24;
  51         return 0;
  52 }
  53
  54 /**
  55  * write_i2c_reg - writes to an internal i2c register
  56  *
  57  * @addr:       dt3155 mmio base address
  58  * @index:      index (internal address) of register to read
  59  * @data:       data to be written
  60  *
  61  * returns:     zero on success or error code
  62  *
  63  * This function starts writing the specified (by index) register
  64  * and busy waits for the process to finish.
  65  */
  66 static int write_i2c_reg(void __iomem *addr, u8 index, u8 data)
  67 {
  68         u32 tmp = index;
  69
  70         iowrite32((tmp << 17) | IIC_WRITE | data, addr + IIC_CSR2);
  71         udelay(65); /* wait at least 63 usec for NEW_CYCLE to clear */
  72         if (ioread32(addr + IIC_CSR2) & NEW_CYCLE)
  73                 return -EIO; /* error: NEW_CYCLE not cleared */
  74         if (ioread32(addr + IIC_CSR1) & DIRECT_ABORT) {
  75                 /* reset DIRECT_ABORT bit */
  76                 iowrite32(DIRECT_ABORT, addr + IIC_CSR1);
  77                 return -EIO; /* error: DIRECT_ABORT set */
  78         }
  79         return 0;
  80 }
  81
  82 /**
  83  * write_i2c_reg_nowait - writes to an internal i2c register
  84  *
  85  * @addr:       dt3155 mmio base address
  86  * @index:      index (internal address) of register to read
  87  * @data:       data to be written
  88  *
  89  * This function starts writing the specified (by index) register
  90  * and then returns.
  91  */
  92 static void write_i2c_reg_nowait(void __iomem *addr, u8 index, u8 data)
  93 {
  94         u32 tmp = index;
  95
  96         iowrite32((tmp << 17) | IIC_WRITE | data, addr + IIC_CSR2);
  97 }
  98
  99 /**
 100  * wait_i2c_reg - waits the read/write to finish
 101  *
 102  * @addr:       dt3155 mmio base address
 103  *
 104  * returns:     zero on success or error code
 105  *
 106  * This function waits reading/writing to finish.
 107  */
 108 static int wait_i2c_reg(void __iomem *addr)
 109 {
 110         if (ioread32(addr + IIC_CSR2) & NEW_CYCLE)
 111                 udelay(65); /* wait at least 63 usec for NEW_CYCLE to clear */
 112         if (ioread32(addr + IIC_CSR2) & NEW_CYCLE)
 113                 return -EIO; /* error: NEW_CYCLE not cleared */
 114         if (ioread32(addr + IIC_CSR1) & DIRECT_ABORT) {
 115                 /* reset DIRECT_ABORT bit */
 116                 iowrite32(DIRECT_ABORT, addr + IIC_CSR1);
 117                 return -EIO; /* error: DIRECT_ABORT set */
 118         }
 119         return 0;
 120 }
 121
 122 static int
 123 dt3155_queue_setup(struct vb2_queue *vq,
 124                 unsigned int *nbuffers, unsigned int *num_planes,
 125                 unsigned int sizes[], struct device *alloc_devs[])
 126
 127 {
 128         struct dt3155_priv *pd = vb2_get_drv_priv(vq);
 129         unsigned size = pd->width * pd->height;
 130
 131         if (vq->num_buffers + *nbuffers < 2)
 132                 *nbuffers = 2 - vq->num_buffers;
 133         if (*num_planes)
 134                 return sizes[0] < size ? -EINVAL : 0;
 135         *num_planes = 1;
 136         sizes[0] = size;
 137         return 0;
 138 }
 139
 140 static int dt3155_buf_prepare(struct vb2_buffer *vb)
 141 {
 142         struct dt3155_priv *pd = vb2_get_drv_priv(vb->vb2_queue);
 143
 144         vb2_set_plane_payload(vb, 0, pd->width * pd->height);
 145         return 0;
 146 }
 147
 148 static int dt3155_start_streaming(struct vb2_queue *q, unsigned count)
 149 {
 150         struct dt3155_priv *pd = vb2_get_drv_priv(q);
 151         struct vb2_buffer *vb = &pd->curr_buf->vb2_buf;
 152         dma_addr_t dma_addr;
 153
 154         pd->sequence = 0;
 155         dma_addr = vb2_dma_contig_plane_dma_addr(vb, 0);
 156         iowrite32(dma_addr, pd->regs + EVEN_DMA_START);
 157         iowrite32(dma_addr + pd->width, pd->regs + ODD_DMA_START);
 158         iowrite32(pd->width, pd->regs + EVEN_DMA_STRIDE);
 159         iowrite32(pd->width, pd->regs + ODD_DMA_STRIDE);
 160         /* enable interrupts, clear all irq flags */
 161         iowrite32(FLD_START_EN | FLD_END_ODD_EN | FLD_START |
 162                         FLD_END_EVEN | FLD_END_ODD, pd->regs + INT_CSR);
 163         iowrite32(FIFO_EN | SRST | FLD_CRPT_ODD | FLD_CRPT_EVEN |
 164                   FLD_DN_ODD | FLD_DN_EVEN | CAP_CONT_EVEN | CAP_CONT_ODD,
 165                                                         pd->regs + CSR1);
 166         wait_i2c_reg(pd->regs);
 167         write_i2c_reg(pd->regs, CONFIG, pd->config);
 168         write_i2c_reg(pd->regs, EVEN_CSR, CSR_ERROR | CSR_DONE);
 169         write_i2c_reg(pd->regs, ODD_CSR, CSR_ERROR | CSR_DONE);
 170
 171         /*  start the board  */
 172         write_i2c_reg(pd->regs, CSR2, pd->csr2 | BUSY_EVEN | BUSY_ODD);
 173         return 0;
 174 }
 175
 176 static void dt3155_stop_streaming(struct vb2_queue *q)
 177 {
 178         struct dt3155_priv *pd = vb2_get_drv_priv(q);
 179         struct vb2_buffer *vb;
 180
 181         spin_lock_irq(&pd->lock);
 182         /* stop the board */
 183         write_i2c_reg_nowait(pd->regs, CSR2, pd->csr2);
 184         iowrite32(FIFO_EN | SRST | FLD_CRPT_ODD | FLD_CRPT_EVEN |
 185                   FLD_DN_ODD | FLD_DN_EVEN, pd->regs + CSR1);
 186         /* disable interrupts, clear all irq flags */
 187         iowrite32(FLD_START | FLD_END_EVEN | FLD_END_ODD, pd->regs + INT_CSR);
 188         spin_unlock_irq(&pd->lock);
 189
 190         /*
 191          * It is not clear whether the DMA stops at once or whether it
 192          * will finish the current frame or field first. To be on the
 193          * safe side we wait a bit.
 194          */
 195         msleep(45);
 196
 197         spin_lock_irq(&pd->lock);
 198         if (pd->curr_buf) {
 199                 vb2_buffer_done(&pd->curr_buf->vb2_buf, VB2_BUF_STATE_ERROR);
 200                 pd->curr_buf = NULL;
 201         }
 202
 203         while (!list_empty(&pd->dmaq)) {
 204                 vb = list_first_entry(&pd->dmaq, typeof(*vb), done_entry);
 205                 list_del(&vb->done_entry);
 206                 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
 207         }
 208         spin_unlock_irq(&pd->lock);
 209 }
 210
 211 static void dt3155_buf_queue(struct vb2_buffer *vb)
 212 {
 213         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 214         struct dt3155_priv *pd = vb2_get_drv_priv(vb->vb2_queue);
 215
 216         /*  pd->vidq.streaming = 1 when dt3155_buf_queue() is invoked  */
 217         spin_lock_irq(&pd->lock);
 218         if (pd->curr_buf)
 219                 list_add_tail(&vb->done_entry, &pd->dmaq);
 220         else
 221                 pd->curr_buf = vbuf;
 222         spin_unlock_irq(&pd->lock);
 223 }
 224
 225 static const struct vb2_ops q_ops = {
 226         .queue_setup = dt3155_queue_setup,
 227         .wait_prepare = vb2_ops_wait_prepare,
 228         .wait_finish = vb2_ops_wait_finish,
 229         .buf_prepare = dt3155_buf_prepare,
 230         .start_streaming = dt3155_start_streaming,
 231         .stop_streaming = dt3155_stop_streaming,
 232         .buf_queue = dt3155_buf_queue,
 233 };
 234
 235 static irqreturn_t dt3155_irq_handler_even(int irq, void *dev_id)
 236 {
 237         struct dt3155_priv *ipd = dev_id;
 238         struct vb2_buffer *ivb;
 239         dma_addr_t dma_addr;
 240         u32 tmp;
 241
 242         tmp = ioread32(ipd->regs + INT_CSR) & (FLD_START | FLD_END_ODD);
 243         if (!tmp)
 244                 return IRQ_NONE;  /* not our irq */
 245         if ((tmp & FLD_START) && !(tmp & FLD_END_ODD)) {
 246                 iowrite32(FLD_START_EN | FLD_END_ODD_EN | FLD_START,
 247                                                         ipd->regs + INT_CSR);
 248                 return IRQ_HANDLED; /* start of field irq */
 249         }
 250         tmp = ioread32(ipd->regs + CSR1) & (FLD_CRPT_EVEN | FLD_CRPT_ODD);
 251         if (tmp) {
 252                 iowrite32(FIFO_EN | SRST | FLD_CRPT_ODD | FLD_CRPT_EVEN |
 253                                                 FLD_DN_ODD | FLD_DN_EVEN |
 254                                                 CAP_CONT_EVEN | CAP_CONT_ODD,
 255                                                         ipd->regs + CSR1);
 256         }
 257
 258         spin_lock(&ipd->lock);
 259         if (ipd->curr_buf && !list_empty(&ipd->dmaq)) {
 260                 ipd->curr_buf->vb2_buf.timestamp = ktime_get_ns();
 261                 ipd->curr_buf->sequence = ipd->sequence++;
 262                 ipd->curr_buf->field = V4L2_FIELD_NONE;
 263                 vb2_buffer_done(&ipd->curr_buf->vb2_buf, VB2_BUF_STATE_DONE);
 264
 265                 ivb = list_first_entry(&ipd->dmaq, typeof(*ivb), done_entry);
 266                 list_del(&ivb->done_entry);
 267                 ipd->curr_buf = to_vb2_v4l2_buffer(ivb);
 268                 dma_addr = vb2_dma_contig_plane_dma_addr(ivb, 0);
 269                 iowrite32(dma_addr, ipd->regs + EVEN_DMA_START);
 270                 iowrite32(dma_addr + ipd->width, ipd->regs + ODD_DMA_START);
 271                 iowrite32(ipd->width, ipd->regs + EVEN_DMA_STRIDE);
 272                 iowrite32(ipd->width, ipd->regs + ODD_DMA_STRIDE);
 273         }
 274
 275         /* enable interrupts, clear all irq flags */
 276         iowrite32(FLD_START_EN | FLD_END_ODD_EN | FLD_START |
 277                         FLD_END_EVEN | FLD_END_ODD, ipd->regs + INT_CSR);
 278         spin_unlock(&ipd->lock);
 279         return IRQ_HANDLED;
 280 }
 281
 282 static const struct v4l2_file_operations dt3155_fops = {
 283         .owner = THIS_MODULE,
 284         .open = v4l2_fh_open,
 285         .release = vb2_fop_release,
 286         .unlocked_ioctl = video_ioctl2,
 287         .read = vb2_fop_read,
 288         .mmap = vb2_fop_mmap,
 289         .poll = vb2_fop_poll
 290 };
 291
 292 static int dt3155_querycap(struct file *filp, void *p,
 293                            struct v4l2_capability *cap)
 294 {
 295         strscpy(cap->driver, DT3155_NAME, sizeof(cap->driver));
 296         strscpy(cap->card, DT3155_NAME " frame grabber", sizeof(cap->card));
 297         return 0;
 298 }
 299
 300 static int dt3155_enum_fmt_vid_cap(struct file *filp,
 301                                    void *p, struct v4l2_fmtdesc *f)
 302 {
 303         if (f->index)
 304                 return -EINVAL;
 305         f->pixelformat = V4L2_PIX_FMT_GREY;
 306         return 0;
 307 }
 308
 309 static int dt3155_fmt_vid_cap(struct file *filp, void *p, struct v4l2_format *f)
 310 {
 311         struct dt3155_priv *pd = video_drvdata(filp);
 312
 313         f->fmt.pix.width = pd->width;
 314         f->fmt.pix.height = pd->height;
 315         f->fmt.pix.pixelformat = V4L2_PIX_FMT_GREY;
 316         f->fmt.pix.field = V4L2_FIELD_NONE;
 317         f->fmt.pix.bytesperline = f->fmt.pix.width;
 318         f->fmt.pix.sizeimage = f->fmt.pix.width * f->fmt.pix.height;
 319         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 320         return 0;
 321 }
 322
 323 static int dt3155_g_std(struct file *filp, void *p, v4l2_std_id *norm)
 324 {
 325         struct dt3155_priv *pd = video_drvdata(filp);
 326
 327         *norm = pd->std;
 328         return 0;
 329 }
 330
 331 static int dt3155_s_std(struct file *filp, void *p, v4l2_std_id norm)
 332 {
 333         struct dt3155_priv *pd = video_drvdata(filp);
 334
 335         if (pd->std == norm)
 336                 return 0;
 337         if (vb2_is_busy(&pd->vidq))
 338                 return -EBUSY;
 339         pd->std = norm;
 340         if (pd->std & V4L2_STD_525_60) {
 341                 pd->csr2 = VT_60HZ;
 342                 pd->width = 640;
 343                 pd->height = 480;
 344         } else {
 345                 pd->csr2 = VT_50HZ;
 346                 pd->width = 768;
 347                 pd->height = 576;
 348         }
 349         return 0;
 350 }
 351
 352 static int dt3155_enum_input(struct file *filp, void *p,
 353                              struct v4l2_input *input)
 354 {
 355         if (input->index > 3)
 356                 return -EINVAL;
 357         if (input->index)
 358                 snprintf(input->name, sizeof(input->name), "VID%d",
 359                          input->index);
 360         else
 361                 strscpy(input->name, "J2/VID0", sizeof(input->name));
 362         input->type = V4L2_INPUT_TYPE_CAMERA;
 363         input->std = V4L2_STD_ALL;
 364         input->status = 0;
 365         return 0;
 366 }
 367
 368 static int dt3155_g_input(struct file *filp, void *p, unsigned int *i)
 369 {
 370         struct dt3155_priv *pd = video_drvdata(filp);
 371
 372         *i = pd->input;
 373         return 0;
 374 }
 375
 376 static int dt3155_s_input(struct file *filp, void *p, unsigned int i)
 377 {
 378         struct dt3155_priv *pd = video_drvdata(filp);
 379
 380         if (i > 3)
 381                 return -EINVAL;
 382         pd->input = i;
 383         write_i2c_reg(pd->regs, AD_ADDR, AD_CMD_REG);
 384         write_i2c_reg(pd->regs, AD_CMD, (i << 6) | (i << 4) | SYNC_LVL_3);
 385         return 0;
 386 }
 387
 388 static const struct v4l2_ioctl_ops dt3155_ioctl_ops = {
 389         .vidioc_querycap = dt3155_querycap,
 390         .vidioc_enum_fmt_vid_cap = dt3155_enum_fmt_vid_cap,
 391         .vidioc_try_fmt_vid_cap = dt3155_fmt_vid_cap,
 392         .vidioc_g_fmt_vid_cap = dt3155_fmt_vid_cap,
 393         .vidioc_s_fmt_vid_cap = dt3155_fmt_vid_cap,
 394         .vidioc_reqbufs = vb2_ioctl_reqbufs,
 395         .vidioc_create_bufs = vb2_ioctl_create_bufs,
 396         .vidioc_querybuf = vb2_ioctl_querybuf,
 397         .vidioc_expbuf = vb2_ioctl_expbuf,
 398         .vidioc_qbuf = vb2_ioctl_qbuf,
 399         .vidioc_dqbuf = vb2_ioctl_dqbuf,
 400         .vidioc_streamon = vb2_ioctl_streamon,
 401         .vidioc_streamoff = vb2_ioctl_streamoff,
 402         .vidioc_g_std = dt3155_g_std,
 403         .vidioc_s_std = dt3155_s_std,
 404         .vidioc_enum_input = dt3155_enum_input,
 405         .vidioc_g_input = dt3155_g_input,
 406         .vidioc_s_input = dt3155_s_input,
 407 };
 408
 409 static int dt3155_init_board(struct dt3155_priv *pd)
 410 {
 411         struct pci_dev *pdev = pd->pdev;
 412         int i;
 413         u8 tmp = 0;
 414
 415         pci_set_master(pdev); /* dt3155 needs it */
 416
 417         /*  resetting the adapter  */
 418         iowrite32(ADDR_ERR_ODD | ADDR_ERR_EVEN | FLD_CRPT_ODD | FLD_CRPT_EVEN |
 419                         FLD_DN_ODD | FLD_DN_EVEN, pd->regs + CSR1);
 420         msleep(20);
 421
 422         /*  initializing adapter registers  */
 423         iowrite32(FIFO_EN | SRST, pd->regs + CSR1);
 424         iowrite32(0xEEEEEE01, pd->regs + EVEN_PIXEL_FMT);
 425         iowrite32(0xEEEEEE01, pd->regs + ODD_PIXEL_FMT);
 426         iowrite32(0x00000020, pd->regs + FIFO_TRIGGER);
 427         iowrite32(0x00000103, pd->regs + XFER_MODE);
 428         iowrite32(0, pd->regs + RETRY_WAIT_CNT);
 429         iowrite32(0, pd->regs + INT_CSR);
 430         iowrite32(1, pd->regs + EVEN_FLD_MASK);
 431         iowrite32(1, pd->regs + ODD_FLD_MASK);
 432         iowrite32(0, pd->regs + MASK_LENGTH);
 433         iowrite32(0x0005007C, pd->regs + FIFO_FLAG_CNT);
 434         iowrite32(0x01010101, pd->regs + IIC_CLK_DUR);
 435
 436         /* verifying that we have a DT3155 board (not just a SAA7116 chip) */
 437         read_i2c_reg(pd->regs, DT_ID, &tmp);
 438         if (tmp != DT3155_ID)
 439                 return -ENODEV;
 440
 441         /* initialize AD LUT */
 442         write_i2c_reg(pd->regs, AD_ADDR, 0);
 443         for (i = 0; i < 256; i++)
 444                 write_i2c_reg(pd->regs, AD_LUT, i);
 445
 446         /* initialize ADC references */
 447         /* FIXME: pos_ref & neg_ref depend on VT_50HZ */
 448         write_i2c_reg(pd->regs, AD_ADDR, AD_CMD_REG);
 449         write_i2c_reg(pd->regs, AD_CMD, VIDEO_CNL_1 | SYNC_CNL_1 | SYNC_LVL_3);
 450         write_i2c_reg(pd->regs, AD_ADDR, AD_POS_REF);
 451         write_i2c_reg(pd->regs, AD_CMD, 34);
 452         write_i2c_reg(pd->regs, AD_ADDR, AD_NEG_REF);
 453         write_i2c_reg(pd->regs, AD_CMD, 0);
 454
 455         /* initialize PM LUT */
 456         write_i2c_reg(pd->regs, CONFIG, pd->config | PM_LUT_PGM);
 457         for (i = 0; i < 256; i++) {
 458                 write_i2c_reg(pd->regs, PM_LUT_ADDR, i);
 459                 write_i2c_reg(pd->regs, PM_LUT_DATA, i);
 460         }
 461         write_i2c_reg(pd->regs, CONFIG, pd->config | PM_LUT_PGM | PM_LUT_SEL);
 462         for (i = 0; i < 256; i++) {
 463                 write_i2c_reg(pd->regs, PM_LUT_ADDR, i);
 464                 write_i2c_reg(pd->regs, PM_LUT_DATA, i);
 465         }
 466         write_i2c_reg(pd->regs, CONFIG, pd->config); /*  ACQ_MODE_EVEN  */
 467
 468         /* select channel 1 for input and set sync level */
 469         write_i2c_reg(pd->regs, AD_ADDR, AD_CMD_REG);
 470         write_i2c_reg(pd->regs, AD_CMD, VIDEO_CNL_1 | SYNC_CNL_1 | SYNC_LVL_3);
 471
 472         /* disable all irqs, clear all irq flags */
 473         iowrite32(FLD_START | FLD_END_EVEN | FLD_END_ODD,
 474                         pd->regs + INT_CSR);
 475
 476         return 0;
 477 }
 478
 479 static const struct video_device dt3155_vdev = {
 480         .name = DT3155_NAME,
 481         .fops = &dt3155_fops,
 482         .ioctl_ops = &dt3155_ioctl_ops,
 483         .minor = -1,
 484         .release = video_device_release_empty,
 485         .tvnorms = V4L2_STD_ALL,
 486         .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
 487                        V4L2_CAP_READWRITE,
 488 };
 489
 490 static int dt3155_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 491 {
 492         int err;
 493         struct dt3155_priv *pd;
 494
 495         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
 496         if (err)
 497                 return -ENODEV;
 498         pd = devm_kzalloc(&pdev->dev, sizeof(*pd), GFP_KERNEL);
 499         if (!pd)
 500                 return -ENOMEM;
 501
 502         err = v4l2_device_register(&pdev->dev, &pd->v4l2_dev);
 503         if (err)
 504                 return err;
 505         pd->vdev = dt3155_vdev;
 506         pd->vdev.v4l2_dev = &pd->v4l2_dev;
 507         video_set_drvdata(&pd->vdev, pd);  /* for use in video_fops */
 508         pd->pdev = pdev;
 509         pd->std = V4L2_STD_625_50;
 510         pd->csr2 = VT_50HZ;
 511         pd->width = 768;
 512         pd->height = 576;
 513         INIT_LIST_HEAD(&pd->dmaq);
 514         mutex_init(&pd->mux);
 515         pd->vdev.lock = &pd->mux; /* for locking v4l2_file_operations */
 516         pd->vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 517         pd->vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 518         pd->vidq.io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ;
 519         pd->vidq.ops = &q_ops;
 520         pd->vidq.mem_ops = &vb2_dma_contig_memops;
 521         pd->vidq.drv_priv = pd;
 522         pd->vidq.min_buffers_needed = 2;
 523         pd->vidq.gfp_flags = GFP_DMA32;
 524         pd->vidq.lock = &pd->mux; /* for locking v4l2_file_operations */
 525         pd->vidq.dev = &pdev->dev;
 526         pd->vdev.queue = &pd->vidq;
 527         err = vb2_queue_init(&pd->vidq);
 528         if (err < 0)
 529                 goto err_v4l2_dev_unreg;
 530         spin_lock_init(&pd->lock);
 531         pd->config = ACQ_MODE_EVEN;
 532         err = pci_enable_device(pdev);
 533         if (err)
 534                 goto err_v4l2_dev_unreg;
 535         err = pci_request_region(pdev, 0, pci_name(pdev));
 536         if (err)
 537                 goto err_pci_disable;
 538         pd->regs = pci_iomap(pdev, 0, pci_resource_len(pd->pdev, 0));
 539         if (!pd->regs) {
 540                 err = -ENOMEM;
 541                 goto err_free_reg;
 542         }
 543         err = dt3155_init_board(pd);
 544         if (err)
 545                 goto err_iounmap;
 546         err = request_irq(pd->pdev->irq, dt3155_irq_handler_even,
 547                                         IRQF_SHARED, DT3155_NAME, pd);
 548         if (err)
 549                 goto err_iounmap;
 550         err = video_register_device(&pd->vdev, VFL_TYPE_VIDEO, -1);
 551         if (err)
 552                 goto err_free_irq;
 553         dev_info(&pdev->dev, "/dev/video%i is ready\n", pd->vdev.minor);
 554         return 0;  /*   success   */
 555
 556 err_free_irq:
 557         free_irq(pd->pdev->irq, pd);
 558 err_iounmap:
 559         pci_iounmap(pdev, pd->regs);
 560 err_free_reg:
 561         pci_release_region(pdev, 0);
 562 err_pci_disable:
 563         pci_disable_device(pdev);
 564 err_v4l2_dev_unreg:
 565         v4l2_device_unregister(&pd->v4l2_dev);
 566         return err;
 567 }
 568
 569 static void dt3155_remove(struct pci_dev *pdev)
 570 {
 571         struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev);
 572         struct dt3155_priv *pd = container_of(v4l2_dev, struct dt3155_priv,
 573                                               v4l2_dev);
 574
 575         vb2_video_unregister_device(&pd->vdev);
 576         free_irq(pd->pdev->irq, pd);
 577         v4l2_device_unregister(&pd->v4l2_dev);
 578         pci_iounmap(pdev, pd->regs);
 579         pci_release_region(pdev, 0);
 580         pci_disable_device(pdev);
 581 }
 582
 583 static const struct pci_device_id pci_ids[] = {
 584         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, DT3155_DEVICE_ID) },
 585         { 0, /* zero marks the end */ },
 586 };
 587 MODULE_DEVICE_TABLE(pci, pci_ids);
 588
 589 static struct pci_driver pci_driver = {
 590         .name = DT3155_NAME,
 591         .id_table = pci_ids,
 592         .probe = dt3155_probe,
 593         .remove = dt3155_remove,
 594 };
 595
 596 module_pci_driver(pci_driver);
 597
 598 MODULE_DESCRIPTION("video4linux pci-driver for dt3155 frame grabber");
 599 MODULE_AUTHOR("Marin Mitov <mitov@issp.bas.bg>");
 600 MODULE_VERSION(DT3155_VERSION);
 601 MODULE_LICENSE("GPL");