drivers/staging/media/dt3155v4l/dt3155v4l.c

   1 /***************************************************************************
   2  *   Copyright (C) 2006-2010 by Marin Mitov                                *
   3  *   mitov@issp.bas.bg                                                     *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20
  21 #include <linux/module.h>
  22 #include <linux/version.h>
  23 #include <linux/stringify.h>
  24 #include <linux/delay.h>
  25 #include <linux/kthread.h>
  26 #include <linux/slab.h>
  27 #include <media/v4l2-dev.h>
  28 #include <media/v4l2-ioctl.h>
  29 #include <media/videobuf2-dma-contig.h>
  30
  31 #include "dt3155v4l.h"
  32
  33 #define DT3155_VENDOR_ID 0x8086
  34 #define DT3155_DEVICE_ID 0x1223
  35
  36 /* DT3155_CHUNK_SIZE is 4M (2^22) 8 full size buffers */
  37 #define DT3155_CHUNK_SIZE (1U << 22)
  38
  39 #define DT3155_COH_FLAGS (GFP_KERNEL | GFP_DMA32 | __GFP_COLD | __GFP_NOWARN)
  40
  41 #define DT3155_BUF_SIZE (768 * 576)
  42
  43 #ifdef CONFIG_DT3155_STREAMING
  44 #define DT3155_CAPTURE_METHOD V4L2_CAP_STREAMING
  45 #else
  46 #define DT3155_CAPTURE_METHOD V4L2_CAP_READWRITE
  47 #endif
  48
  49 /*  global initializers (for all boards)  */
  50 #ifdef CONFIG_DT3155_CCIR
  51 static const u8 csr2_init = VT_50HZ;
  52 #define DT3155_CURRENT_NORM V4L2_STD_625_50
  53 static const unsigned int img_width = 768;
  54 static const unsigned int img_height = 576;
  55 static const unsigned int frames_per_sec = 25;
  56 static const struct v4l2_fmtdesc frame_std[] = {
  57         {
  58         .index = 0,
  59         .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
  60         .flags = 0,
  61         .description = "CCIR/50Hz 8 bits gray",
  62         .pixelformat = V4L2_PIX_FMT_GREY,
  63         },
  64 };
  65 #else
  66 static const u8 csr2_init = VT_60HZ;
  67 #define DT3155_CURRENT_NORM V4L2_STD_525_60
  68 static const unsigned int img_width = 640;
  69 static const unsigned int img_height = 480;
  70 static const unsigned int frames_per_sec = 30;
  71 static const struct v4l2_fmtdesc frame_std[] = {
  72         {
  73         .index = 0,
  74         .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
  75         .flags = 0,
  76         .description = "RS-170/60Hz 8 bits gray",
  77         .pixelformat = V4L2_PIX_FMT_GREY,
  78         },
  79 };
  80 #endif
  81
  82 #define NUM_OF_FORMATS ARRAY_SIZE(frame_std)
  83
  84 static u8 config_init = ACQ_MODE_EVEN;
  85
  86 /**
  87  * read_i2c_reg - reads an internal i2c register
  88  *
  89  * @addr:       dt3155 mmio base address
  90  * @index:      index (internal address) of register to read
  91  * @data:       pointer to byte the read data will be placed in
  92  *
  93  * returns:     zero on success or error code
  94  *
  95  * This function starts reading the specified (by index) register
  96  * and busy waits for the process to finish. The result is placed
  97  * in a byte pointed by data.
  98  */
  99 static int
 100 read_i2c_reg(void __iomem *addr, u8 index, u8 *data)
 101 {
 102         u32 tmp = index;
 103
 104         iowrite32((tmp<<17) | IIC_READ, addr + IIC_CSR2);
 105         mmiowb();
 106         udelay(45); /* wait at least 43 usec for NEW_CYCLE to clear */
 107         if (ioread32(addr + IIC_CSR2) & NEW_CYCLE)
 108                 return -EIO; /* error: NEW_CYCLE not cleared */
 109         tmp = ioread32(addr + IIC_CSR1);
 110         if (tmp & DIRECT_ABORT) {
 111                 /* reset DIRECT_ABORT bit */
 112                 iowrite32(DIRECT_ABORT, addr + IIC_CSR1);
 113                 return -EIO; /* error: DIRECT_ABORT set */
 114         }
 115         *data = tmp>>24;
 116         return 0;
 117 }
 118
 119 /**
 120  * write_i2c_reg - writes to an internal i2c register
 121  *
 122  * @addr:       dt3155 mmio base address
 123  * @index:      index (internal address) of register to read
 124  * @data:       data to be written
 125  *
 126  * returns:     zero on success or error code
 127  *
 128  * This function starts writting the specified (by index) register
 129  * and busy waits for the process to finish.
 130  */
 131 static int
 132 write_i2c_reg(void __iomem *addr, u8 index, u8 data)
 133 {
 134         u32 tmp = index;
 135
 136         iowrite32((tmp<<17) | IIC_WRITE | data, addr + IIC_CSR2);
 137         mmiowb();
 138         udelay(65); /* wait at least 63 usec for NEW_CYCLE to clear */
 139         if (ioread32(addr + IIC_CSR2) & NEW_CYCLE)
 140                 return -EIO; /* error: NEW_CYCLE not cleared */
 141         if (ioread32(addr + IIC_CSR1) & DIRECT_ABORT) {
 142                 /* reset DIRECT_ABORT bit */
 143                 iowrite32(DIRECT_ABORT, addr + IIC_CSR1);
 144                 return -EIO; /* error: DIRECT_ABORT set */
 145         }
 146         return 0;
 147 }
 148
 149 /**
 150  * write_i2c_reg_nowait - writes to an internal i2c register
 151  *
 152  * @addr:       dt3155 mmio base address
 153  * @index:      index (internal address) of register to read
 154  * @data:       data to be written
 155  *
 156  * This function starts writting the specified (by index) register
 157  * and then returns.
 158  */
 159 static void write_i2c_reg_nowait(void __iomem *addr, u8 index, u8 data)
 160 {
 161         u32 tmp = index;
 162
 163         iowrite32((tmp<<17) | IIC_WRITE | data, addr + IIC_CSR2);
 164         mmiowb();
 165 }
 166
 167 /**
 168  * wait_i2c_reg - waits the read/write to finish
 169  *
 170  * @addr:       dt3155 mmio base address
 171  *
 172  * returns:     zero on success or error code
 173  *
 174  * This function waits reading/writting to finish.
 175  */
 176 static int wait_i2c_reg(void __iomem *addr)
 177 {
 178         if (ioread32(addr + IIC_CSR2) & NEW_CYCLE)
 179                 udelay(65); /* wait at least 63 usec for NEW_CYCLE to clear */
 180         if (ioread32(addr + IIC_CSR2) & NEW_CYCLE)
 181                 return -EIO; /* error: NEW_CYCLE not cleared */
 182         if (ioread32(addr + IIC_CSR1) & DIRECT_ABORT) {
 183                 /* reset DIRECT_ABORT bit */
 184                 iowrite32(DIRECT_ABORT, addr + IIC_CSR1);
 185                 return -EIO; /* error: DIRECT_ABORT set */
 186         }
 187         return 0;
 188 }
 189
 190 static int
 191 dt3155_start_acq(struct dt3155_priv *pd)
 192 {
 193         struct vb2_buffer *vb = pd->curr_buf;
 194         dma_addr_t dma_addr;
 195
 196         dma_addr = vb2_dma_contig_plane_dma_addr(vb, 0);
 197         iowrite32(dma_addr, pd->regs + EVEN_DMA_START);
 198         iowrite32(dma_addr + img_width, pd->regs + ODD_DMA_START);
 199         iowrite32(img_width, pd->regs + EVEN_DMA_STRIDE);
 200         iowrite32(img_width, pd->regs + ODD_DMA_STRIDE);
 201         /* enable interrupts, clear all irq flags */
 202         iowrite32(FLD_START_EN | FLD_END_ODD_EN | FLD_START |
 203                         FLD_END_EVEN | FLD_END_ODD, pd->regs + INT_CSR);
 204         iowrite32(FIFO_EN | SRST | FLD_CRPT_ODD | FLD_CRPT_EVEN |
 205                   FLD_DN_ODD | FLD_DN_EVEN | CAP_CONT_EVEN | CAP_CONT_ODD,
 206                                                         pd->regs + CSR1);
 207         wait_i2c_reg(pd->regs);
 208         write_i2c_reg(pd->regs, CONFIG, pd->config);
 209         write_i2c_reg(pd->regs, EVEN_CSR, CSR_ERROR | CSR_DONE);
 210         write_i2c_reg(pd->regs, ODD_CSR, CSR_ERROR | CSR_DONE);
 211
 212         /*  start the board  */
 213         write_i2c_reg(pd->regs, CSR2, pd->csr2 | BUSY_EVEN | BUSY_ODD);
 214         return 0; /* success  */
 215 }
 216
 217 /*
 218  *      driver-specific callbacks (vb2_ops)
 219  */
 220 static int
 221 dt3155_queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
 222                 unsigned int *num_buffers, unsigned int *num_planes,
 223                 unsigned int sizes[], void *alloc_ctxs[])
 224
 225 {
 226         struct dt3155_priv *pd = vb2_get_drv_priv(q);
 227         void *ret;
 228
 229         if (*num_buffers == 0)
 230                 *num_buffers = 1;
 231         *num_planes = 1;
 232         sizes[0] = img_width * img_height;
 233         if (pd->q->alloc_ctx[0])
 234                 return 0;
 235         ret = vb2_dma_contig_init_ctx(&pd->pdev->dev);
 236         if (IS_ERR(ret))
 237                 return PTR_ERR(ret);
 238         pd->q->alloc_ctx[0] = ret;
 239         return 0;
 240 }
 241
 242 static void
 243 dt3155_wait_prepare(struct vb2_queue *q)
 244 {
 245         struct dt3155_priv *pd = vb2_get_drv_priv(q);
 246
 247         mutex_unlock(pd->vdev->lock);
 248 }
 249
 250 static void
 251 dt3155_wait_finish(struct vb2_queue *q)
 252 {
 253         struct dt3155_priv *pd = vb2_get_drv_priv(q);
 254
 255         mutex_lock(pd->vdev->lock);
 256 }
 257
 258 static int
 259 dt3155_buf_prepare(struct vb2_buffer *vb)
 260 {
 261         vb2_set_plane_payload(vb, 0, img_width * img_height);
 262         return 0;
 263 }
 264
 265 static int
 266 dt3155_stop_streaming(struct vb2_queue *q)
 267 {
 268         struct dt3155_priv *pd = vb2_get_drv_priv(q);
 269         struct vb2_buffer *vb;
 270
 271         spin_lock_irq(&pd->lock);
 272         while (!list_empty(&pd->dmaq)) {
 273                 vb = list_first_entry(&pd->dmaq, typeof(*vb), done_entry);
 274                 list_del(&vb->done_entry);
 275                 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
 276         }
 277         spin_unlock_irq(&pd->lock);
 278         msleep(45); /* irq hendler will stop the hardware */
 279         return 0;
 280 }
 281
 282 static void
 283 dt3155_buf_queue(struct vb2_buffer *vb)
 284 {
 285         struct dt3155_priv *pd = vb2_get_drv_priv(vb->vb2_queue);
 286
 287         /*  pd->q->streaming = 1 when dt3155_buf_queue() is invoked  */
 288         spin_lock_irq(&pd->lock);
 289         if (pd->curr_buf)
 290                 list_add_tail(&vb->done_entry, &pd->dmaq);
 291         else {
 292                 pd->curr_buf = vb;
 293                 dt3155_start_acq(pd);
 294         }
 295         spin_unlock_irq(&pd->lock);
 296 }
 297 /*
 298  *      end driver-specific callbacks
 299  */
 300
 301 const struct vb2_ops q_ops = {
 302         .queue_setup = dt3155_queue_setup,
 303         .wait_prepare = dt3155_wait_prepare,
 304         .wait_finish = dt3155_wait_finish,
 305         .buf_prepare = dt3155_buf_prepare,
 306         .stop_streaming = dt3155_stop_streaming,
 307         .buf_queue = dt3155_buf_queue,
 308 };
 309
 310 static irqreturn_t
 311 dt3155_irq_handler_even(int irq, void *dev_id)
 312 {
 313         struct dt3155_priv *ipd = dev_id;
 314         struct vb2_buffer *ivb;
 315         dma_addr_t dma_addr;
 316         u32 tmp;
 317
 318         tmp = ioread32(ipd->regs + INT_CSR) & (FLD_START | FLD_END_ODD);
 319         if (!tmp)
 320                 return IRQ_NONE;  /* not our irq */
 321         if ((tmp & FLD_START) && !(tmp & FLD_END_ODD)) {
 322                 iowrite32(FLD_START_EN | FLD_END_ODD_EN | FLD_START,
 323                                                         ipd->regs + INT_CSR);
 324                 ipd->field_count++;
 325                 return IRQ_HANDLED; /* start of field irq */
 326         }
 327         if ((tmp & FLD_START) && (tmp & FLD_END_ODD))
 328                 ipd->stats.start_before_end++;
 329         /*      check for corrupted fields     */
 330 /*      write_i2c_reg(ipd->regs, EVEN_CSR, CSR_ERROR | CSR_DONE);       */
 331 /*      write_i2c_reg(ipd->regs, ODD_CSR, CSR_ERROR | CSR_DONE);        */
 332         tmp = ioread32(ipd->regs + CSR1) & (FLD_CRPT_EVEN | FLD_CRPT_ODD);
 333         if (tmp) {
 334                 ipd->stats.corrupted_fields++;
 335                 iowrite32(FIFO_EN | SRST | FLD_CRPT_ODD | FLD_CRPT_EVEN |
 336                                                 FLD_DN_ODD | FLD_DN_EVEN |
 337                                                 CAP_CONT_EVEN | CAP_CONT_ODD,
 338                                                         ipd->regs + CSR1);
 339                 mmiowb();
 340         }
 341
 342         spin_lock(&ipd->lock);
 343         if (ipd->curr_buf) {
 344                 do_gettimeofday(&ipd->curr_buf->v4l2_buf.timestamp);
 345                 ipd->curr_buf->v4l2_buf.sequence = (ipd->field_count) >> 1;
 346                 vb2_buffer_done(ipd->curr_buf, VB2_BUF_STATE_DONE);
 347         }
 348
 349         if (!ipd->q->streaming || list_empty(&ipd->dmaq))
 350                 goto stop_dma;
 351         ivb = list_first_entry(&ipd->dmaq, typeof(*ivb), done_entry);
 352         list_del(&ivb->done_entry);
 353         ipd->curr_buf = ivb;
 354         dma_addr = vb2_dma_contig_plane_dma_addr(ivb, 0);
 355         iowrite32(dma_addr, ipd->regs + EVEN_DMA_START);
 356         iowrite32(dma_addr + img_width, ipd->regs + ODD_DMA_START);
 357         iowrite32(img_width, ipd->regs + EVEN_DMA_STRIDE);
 358         iowrite32(img_width, ipd->regs + ODD_DMA_STRIDE);
 359         mmiowb();
 360         /* enable interrupts, clear all irq flags */
 361         iowrite32(FLD_START_EN | FLD_END_ODD_EN | FLD_START |
 362                         FLD_END_EVEN | FLD_END_ODD, ipd->regs + INT_CSR);
 363         spin_unlock(&ipd->lock);
 364         return IRQ_HANDLED;
 365
 366 stop_dma:
 367         ipd->curr_buf = NULL;
 368         /* stop the board */
 369         write_i2c_reg_nowait(ipd->regs, CSR2, ipd->csr2);
 370         iowrite32(FIFO_EN | SRST | FLD_CRPT_ODD | FLD_CRPT_EVEN |
 371                   FLD_DN_ODD | FLD_DN_EVEN, ipd->regs + CSR1);
 372         /* disable interrupts, clear all irq flags */
 373         iowrite32(FLD_START | FLD_END_EVEN | FLD_END_ODD, ipd->regs + INT_CSR);
 374         spin_unlock(&ipd->lock);
 375         return IRQ_HANDLED;
 376 }
 377
 378 static int
 379 dt3155_open(struct file *filp)
 380 {
 381         int ret = 0;
 382         struct dt3155_priv *pd = video_drvdata(filp);
 383
 384         if (!pd->users) {
 385                 pd->q = kzalloc(sizeof(*pd->q), GFP_KERNEL);
 386                 if (!pd->q) {
 387                         ret = -ENOMEM;
 388                         goto err_alloc_queue;
 389                 }
 390                 pd->q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 391                 pd->q->io_modes = VB2_READ | VB2_MMAP;
 392                 pd->q->ops = &q_ops;
 393                 pd->q->mem_ops = &vb2_dma_contig_memops;
 394                 pd->q->drv_priv = pd;
 395                 pd->curr_buf = NULL;
 396                 pd->field_count = 0;
 397                 vb2_queue_init(pd->q); /* cannot fail */
 398                 INIT_LIST_HEAD(&pd->dmaq);
 399                 spin_lock_init(&pd->lock);
 400                 /* disable all irqs, clear all irq flags */
 401                 iowrite32(FLD_START | FLD_END_EVEN | FLD_END_ODD,
 402                                                 pd->regs + INT_CSR);
 403                 ret = request_irq(pd->pdev->irq, dt3155_irq_handler_even,
 404                                                 IRQF_SHARED, DT3155_NAME, pd);
 405                 if (ret)
 406                         goto err_request_irq;
 407         }
 408         pd->users++;
 409         return 0; /* success */
 410 err_request_irq:
 411         kfree(pd->q);
 412         pd->q = NULL;
 413 err_alloc_queue:
 414         return ret;
 415 }
 416
 417 static int
 418 dt3155_release(struct file *filp)
 419 {
 420         struct dt3155_priv *pd = video_drvdata(filp);
 421
 422         pd->users--;
 423         BUG_ON(pd->users < 0);
 424         if (!pd->users) {
 425                 vb2_queue_release(pd->q);
 426                 free_irq(pd->pdev->irq, pd);
 427                 if (pd->q->alloc_ctx[0])
 428                         vb2_dma_contig_cleanup_ctx(pd->q->alloc_ctx[0]);
 429                 kfree(pd->q);
 430                 pd->q = NULL;
 431         }
 432         return 0;
 433 }
 434
 435 static ssize_t
 436 dt3155_read(struct file *filp, char __user *user, size_t size, loff_t *loff)
 437 {
 438         struct dt3155_priv *pd = video_drvdata(filp);
 439
 440         return vb2_read(pd->q, user, size, loff, filp->f_flags & O_NONBLOCK);
 441 }
 442
 443 static unsigned int
 444 dt3155_poll(struct file *filp, struct poll_table_struct *polltbl)
 445 {
 446         struct dt3155_priv *pd = video_drvdata(filp);
 447
 448         return vb2_poll(pd->q, filp, polltbl);
 449 }
 450
 451 static int
 452 dt3155_mmap(struct file *filp, struct vm_area_struct *vma)
 453 {
 454         struct dt3155_priv *pd = video_drvdata(filp);
 455
 456         return vb2_mmap(pd->q, vma);
 457 }
 458
 459 static const struct v4l2_file_operations dt3155_fops = {
 460         .owner = THIS_MODULE,
 461         .open = dt3155_open,
 462         .release = dt3155_release,
 463         .read = dt3155_read,
 464         .poll = dt3155_poll,
 465         .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */
 466         .mmap = dt3155_mmap,
 467 };
 468
 469 static int
 470 dt3155_ioc_streamon(struct file *filp, void *p, enum v4l2_buf_type type)
 471 {
 472         struct dt3155_priv *pd = video_drvdata(filp);
 473
 474         return vb2_streamon(pd->q, type);
 475 }
 476
 477 static int
 478 dt3155_ioc_streamoff(struct file *filp, void *p, enum v4l2_buf_type type)
 479 {
 480         struct dt3155_priv *pd = video_drvdata(filp);
 481
 482         return vb2_streamoff(pd->q, type);
 483 }
 484
 485 static int
 486 dt3155_ioc_querycap(struct file *filp, void *p, struct v4l2_capability *cap)
 487 {
 488         struct dt3155_priv *pd = video_drvdata(filp);
 489
 490         strcpy(cap->driver, DT3155_NAME);
 491         strcpy(cap->card, DT3155_NAME " frame grabber");
 492         sprintf(cap->bus_info, "PCI:%s", pci_name(pd->pdev));
 493         cap->version =
 494                KERNEL_VERSION(DT3155_VER_MAJ, DT3155_VER_MIN, DT3155_VER_EXT);
 495         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
 496                                 DT3155_CAPTURE_METHOD;
 497         return 0;
 498 }
 499
 500 static int
 501 dt3155_ioc_enum_fmt_vid_cap(struct file *filp, void *p, struct v4l2_fmtdesc *f)
 502 {
 503         if (f->index >= NUM_OF_FORMATS)
 504                 return -EINVAL;
 505         *f = frame_std[f->index];
 506         return 0;
 507 }
 508
 509 static int
 510 dt3155_ioc_g_fmt_vid_cap(struct file *filp, void *p, struct v4l2_format *f)
 511 {
 512         if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 513                 return -EINVAL;
 514         f->fmt.pix.width = img_width;
 515         f->fmt.pix.height = img_height;
 516         f->fmt.pix.pixelformat = V4L2_PIX_FMT_GREY;
 517         f->fmt.pix.field = V4L2_FIELD_NONE;
 518         f->fmt.pix.bytesperline = f->fmt.pix.width;
 519         f->fmt.pix.sizeimage = f->fmt.pix.width * f->fmt.pix.height;
 520         f->fmt.pix.colorspace = 0;
 521         f->fmt.pix.priv = 0;
 522         return 0;
 523 }
 524
 525 static int
 526 dt3155_ioc_try_fmt_vid_cap(struct file *filp, void *p, struct v4l2_format *f)
 527 {
 528         if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 529                 return -EINVAL;
 530         if (f->fmt.pix.width == img_width &&
 531                 f->fmt.pix.height == img_height &&
 532                 f->fmt.pix.pixelformat == V4L2_PIX_FMT_GREY &&
 533                 f->fmt.pix.field == V4L2_FIELD_NONE &&
 534                 f->fmt.pix.bytesperline == f->fmt.pix.width &&
 535                 f->fmt.pix.sizeimage == f->fmt.pix.width * f->fmt.pix.height)
 536                         return 0;
 537         else
 538                 return -EINVAL;
 539 }
 540
 541 static int
 542 dt3155_ioc_s_fmt_vid_cap(struct file *filp, void *p, struct v4l2_format *f)
 543 {
 544         return dt3155_ioc_g_fmt_vid_cap(filp, p, f);
 545 }
 546
 547 static int
 548 dt3155_ioc_reqbufs(struct file *filp, void *p, struct v4l2_requestbuffers *b)
 549 {
 550         struct dt3155_priv *pd = video_drvdata(filp);
 551
 552         return vb2_reqbufs(pd->q, b);
 553 }
 554
 555 static int
 556 dt3155_ioc_querybuf(struct file *filp, void *p, struct v4l2_buffer *b)
 557 {
 558         struct dt3155_priv *pd = video_drvdata(filp);
 559
 560         return vb2_querybuf(pd->q, b);
 561 }
 562
 563 static int
 564 dt3155_ioc_qbuf(struct file *filp, void *p, struct v4l2_buffer *b)
 565 {
 566         struct dt3155_priv *pd = video_drvdata(filp);
 567
 568         return vb2_qbuf(pd->q, b);
 569 }
 570
 571 static int
 572 dt3155_ioc_dqbuf(struct file *filp, void *p, struct v4l2_buffer *b)
 573 {
 574         struct dt3155_priv *pd = video_drvdata(filp);
 575
 576         return vb2_dqbuf(pd->q, b, filp->f_flags & O_NONBLOCK);
 577 }
 578
 579 static int
 580 dt3155_ioc_querystd(struct file *filp, void *p, v4l2_std_id *norm)
 581 {
 582         *norm = DT3155_CURRENT_NORM;
 583         return 0;
 584 }
 585
 586 static int
 587 dt3155_ioc_g_std(struct file *filp, void *p, v4l2_std_id *norm)
 588 {
 589         *norm = DT3155_CURRENT_NORM;
 590         return 0;
 591 }
 592
 593 static int
 594 dt3155_ioc_s_std(struct file *filp, void *p, v4l2_std_id *norm)
 595 {
 596         if (*norm & DT3155_CURRENT_NORM)
 597                 return 0;
 598         return -EINVAL;
 599 }
 600
 601 static int
 602 dt3155_ioc_enum_input(struct file *filp, void *p, struct v4l2_input *input)
 603 {
 604         if (input->index)
 605                 return -EINVAL;
 606         strcpy(input->name, "Coax in");
 607         input->type = V4L2_INPUT_TYPE_CAMERA;
 608         /*
 609          * FIXME: input->std = 0 according to v4l2 API
 610          * VIDIOC_G_STD, VIDIOC_S_STD, VIDIOC_QUERYSTD and VIDIOC_ENUMSTD
 611          * should return -EINVAL
 612          */
 613         input->std = DT3155_CURRENT_NORM;
 614         input->status = 0;/* FIXME: add sync detection & V4L2_IN_ST_NO_H_LOCK */
 615         return 0;
 616 }
 617
 618 static int
 619 dt3155_ioc_g_input(struct file *filp, void *p, unsigned int *i)
 620 {
 621         *i = 0;
 622         return 0;
 623 }
 624
 625 static int
 626 dt3155_ioc_s_input(struct file *filp, void *p, unsigned int i)
 627 {
 628         if (i)
 629                 return -EINVAL;
 630         return 0;
 631 }
 632
 633 static int
 634 dt3155_ioc_g_parm(struct file *filp, void *p, struct v4l2_streamparm *parms)
 635 {
 636         if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 637                 return -EINVAL;
 638         parms->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
 639         parms->parm.capture.capturemode = 0;
 640         parms->parm.capture.timeperframe.numerator = 1001;
 641         parms->parm.capture.timeperframe.denominator = frames_per_sec * 1000;
 642         parms->parm.capture.extendedmode = 0;
 643         parms->parm.capture.readbuffers = 1; /* FIXME: 2 buffers? */
 644         return 0;
 645 }
 646
 647 static int
 648 dt3155_ioc_s_parm(struct file *filp, void *p, struct v4l2_streamparm *parms)
 649 {
 650         if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 651                 return -EINVAL;
 652         parms->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
 653         parms->parm.capture.capturemode = 0;
 654         parms->parm.capture.timeperframe.numerator = 1001;
 655         parms->parm.capture.timeperframe.denominator = frames_per_sec * 1000;
 656         parms->parm.capture.extendedmode = 0;
 657         parms->parm.capture.readbuffers = 1; /* FIXME: 2 buffers? */
 658         return 0;
 659 }
 660
 661 static const struct v4l2_ioctl_ops dt3155_ioctl_ops = {
 662         .vidioc_streamon = dt3155_ioc_streamon,
 663         .vidioc_streamoff = dt3155_ioc_streamoff,
 664         .vidioc_querycap = dt3155_ioc_querycap,
 665 /*
 666         .vidioc_g_priority = dt3155_ioc_g_priority,
 667         .vidioc_s_priority = dt3155_ioc_s_priority,
 668 */
 669         .vidioc_enum_fmt_vid_cap = dt3155_ioc_enum_fmt_vid_cap,
 670         .vidioc_try_fmt_vid_cap = dt3155_ioc_try_fmt_vid_cap,
 671         .vidioc_g_fmt_vid_cap = dt3155_ioc_g_fmt_vid_cap,
 672         .vidioc_s_fmt_vid_cap = dt3155_ioc_s_fmt_vid_cap,
 673         .vidioc_reqbufs = dt3155_ioc_reqbufs,
 674         .vidioc_querybuf = dt3155_ioc_querybuf,
 675         .vidioc_qbuf = dt3155_ioc_qbuf,
 676         .vidioc_dqbuf = dt3155_ioc_dqbuf,
 677         .vidioc_querystd = dt3155_ioc_querystd,
 678         .vidioc_g_std = dt3155_ioc_g_std,
 679         .vidioc_s_std = dt3155_ioc_s_std,
 680         .vidioc_enum_input = dt3155_ioc_enum_input,
 681         .vidioc_g_input = dt3155_ioc_g_input,
 682         .vidioc_s_input = dt3155_ioc_s_input,
 683 /*
 684         .vidioc_queryctrl = dt3155_ioc_queryctrl,
 685         .vidioc_g_ctrl = dt3155_ioc_g_ctrl,
 686         .vidioc_s_ctrl = dt3155_ioc_s_ctrl,
 687         .vidioc_querymenu = dt3155_ioc_querymenu,
 688         .vidioc_g_ext_ctrls = dt3155_ioc_g_ext_ctrls,
 689         .vidioc_s_ext_ctrls = dt3155_ioc_s_ext_ctrls,
 690 */
 691         .vidioc_g_parm = dt3155_ioc_g_parm,
 692         .vidioc_s_parm = dt3155_ioc_s_parm,
 693 /*
 694         .vidioc_cropcap = dt3155_ioc_cropcap,
 695         .vidioc_g_crop = dt3155_ioc_g_crop,
 696         .vidioc_s_crop = dt3155_ioc_s_crop,
 697         .vidioc_enum_framesizes = dt3155_ioc_enum_framesizes,
 698         .vidioc_enum_frameintervals = dt3155_ioc_enum_frameintervals,
 699 */
 700 };
 701
 702 static int __devinit
 703 dt3155_init_board(struct pci_dev *pdev)
 704 {
 705         struct dt3155_priv *pd = pci_get_drvdata(pdev);
 706         void *buf_cpu;
 707         dma_addr_t buf_dma;
 708         int i;
 709         u8 tmp;
 710
 711         pci_set_master(pdev); /* dt3155 needs it */
 712
 713         /*  resetting the adapter  */
 714         iowrite32(FLD_CRPT_ODD | FLD_CRPT_EVEN | FLD_DN_ODD | FLD_DN_EVEN,
 715                                                         pd->regs + CSR1);
 716         mmiowb();
 717         msleep(20);
 718
 719         /*  initializing adaper registers  */
 720         iowrite32(FIFO_EN | SRST, pd->regs + CSR1);
 721         mmiowb();
 722         iowrite32(0xEEEEEE01, pd->regs + EVEN_PIXEL_FMT);
 723         iowrite32(0xEEEEEE01, pd->regs + ODD_PIXEL_FMT);
 724         iowrite32(0x00000020, pd->regs + FIFO_TRIGER);
 725         iowrite32(0x00000103, pd->regs + XFER_MODE);
 726         iowrite32(0, pd->regs + RETRY_WAIT_CNT);
 727         iowrite32(0, pd->regs + INT_CSR);
 728         iowrite32(1, pd->regs + EVEN_FLD_MASK);
 729         iowrite32(1, pd->regs + ODD_FLD_MASK);
 730         iowrite32(0, pd->regs + MASK_LENGTH);
 731         iowrite32(0x0005007C, pd->regs + FIFO_FLAG_CNT);
 732         iowrite32(0x01010101, pd->regs + IIC_CLK_DUR);
 733         mmiowb();
 734
 735         /* verifying that we have a DT3155 board (not just a SAA7116 chip) */
 736         read_i2c_reg(pd->regs, DT_ID, &tmp);
 737         if (tmp != DT3155_ID)
 738                 return -ENODEV;
 739
 740         /* initialize AD LUT */
 741         write_i2c_reg(pd->regs, AD_ADDR, 0);
 742         for (i = 0; i < 256; i++)
 743                 write_i2c_reg(pd->regs, AD_LUT, i);
 744
 745         /* initialize ADC references */
 746         /* FIXME: pos_ref & neg_ref depend on VT_50HZ */
 747         write_i2c_reg(pd->regs, AD_ADDR, AD_CMD_REG);
 748         write_i2c_reg(pd->regs, AD_CMD, VIDEO_CNL_1 | SYNC_CNL_1 | SYNC_LVL_3);
 749         write_i2c_reg(pd->regs, AD_ADDR, AD_POS_REF);
 750         write_i2c_reg(pd->regs, AD_CMD, 34);
 751         write_i2c_reg(pd->regs, AD_ADDR, AD_NEG_REF);
 752         write_i2c_reg(pd->regs, AD_CMD, 0);
 753
 754         /* initialize PM LUT */
 755         write_i2c_reg(pd->regs, CONFIG, pd->config | PM_LUT_PGM);
 756         for (i = 0; i < 256; i++) {
 757                 write_i2c_reg(pd->regs, PM_LUT_ADDR, i);
 758                 write_i2c_reg(pd->regs, PM_LUT_DATA, i);
 759         }
 760         write_i2c_reg(pd->regs, CONFIG, pd->config | PM_LUT_PGM | PM_LUT_SEL);
 761         for (i = 0; i < 256; i++) {
 762                 write_i2c_reg(pd->regs, PM_LUT_ADDR, i);
 763                 write_i2c_reg(pd->regs, PM_LUT_DATA, i);
 764         }
 765         write_i2c_reg(pd->regs, CONFIG, pd->config); /*  ACQ_MODE_EVEN  */
 766
 767         /* select chanel 1 for input and set sync level */
 768         write_i2c_reg(pd->regs, AD_ADDR, AD_CMD_REG);
 769         write_i2c_reg(pd->regs, AD_CMD, VIDEO_CNL_1 | SYNC_CNL_1 | SYNC_LVL_3);
 770
 771         /* allocate memory, and initialize the DMA machine */
 772         buf_cpu = dma_alloc_coherent(&pdev->dev, DT3155_BUF_SIZE, &buf_dma,
 773                                                                 GFP_KERNEL);
 774         if (!buf_cpu)
 775                 return -ENOMEM;
 776         iowrite32(buf_dma, pd->regs + EVEN_DMA_START);
 777         iowrite32(buf_dma, pd->regs + ODD_DMA_START);
 778         iowrite32(0, pd->regs + EVEN_DMA_STRIDE);
 779         iowrite32(0, pd->regs + ODD_DMA_STRIDE);
 780
 781         /*  Perform a pseudo even field acquire    */
 782         iowrite32(FIFO_EN | SRST | CAP_CONT_ODD, pd->regs + CSR1);
 783         write_i2c_reg(pd->regs, CSR2, pd->csr2 | SYNC_SNTL);
 784         write_i2c_reg(pd->regs, CONFIG, pd->config);
 785         write_i2c_reg(pd->regs, EVEN_CSR, CSR_SNGL);
 786         write_i2c_reg(pd->regs, CSR2, pd->csr2 | BUSY_EVEN | SYNC_SNTL);
 787         msleep(100);
 788         read_i2c_reg(pd->regs, CSR2, &tmp);
 789         write_i2c_reg(pd->regs, EVEN_CSR, CSR_ERROR | CSR_SNGL | CSR_DONE);
 790         write_i2c_reg(pd->regs, ODD_CSR, CSR_ERROR | CSR_SNGL | CSR_DONE);
 791         write_i2c_reg(pd->regs, CSR2, pd->csr2);
 792         iowrite32(FIFO_EN | SRST | FLD_DN_EVEN | FLD_DN_ODD, pd->regs + CSR1);
 793
 794         /*  deallocate memory  */
 795         dma_free_coherent(&pdev->dev, DT3155_BUF_SIZE, buf_cpu, buf_dma);
 796         if (tmp & BUSY_EVEN)
 797                 return -EIO;
 798         return 0;
 799 }
 800
 801 static struct video_device dt3155_vdev = {
 802         .name = DT3155_NAME,
 803         .fops = &dt3155_fops,
 804         .ioctl_ops = &dt3155_ioctl_ops,
 805         .minor = -1,
 806         .release = video_device_release,
 807         .tvnorms = DT3155_CURRENT_NORM,
 808         .current_norm = DT3155_CURRENT_NORM,
 809 };
 810
 811 /* same as in drivers/base/dma-coherent.c */
 812 struct dma_coherent_mem {
 813         void            *virt_base;
 814         dma_addr_t      device_base;
 815         int             size;
 816         int             flags;
 817         unsigned long   *bitmap;
 818 };
 819
 820 static int __devinit
 821 dt3155_alloc_coherent(struct device *dev, size_t size, int flags)
 822 {
 823         struct dma_coherent_mem *mem;
 824         dma_addr_t dev_base;
 825         int pages = size >> PAGE_SHIFT;
 826         int bitmap_size = BITS_TO_LONGS(pages) * sizeof(long);
 827
 828         if ((flags & DMA_MEMORY_MAP) == 0)
 829                 goto out;
 830         if (!size)
 831                 goto out;
 832         if (dev->dma_mem)
 833                 goto out;
 834
 835         mem = kzalloc(sizeof(*mem), GFP_KERNEL);
 836         if (!mem)
 837                 goto out;
 838         mem->virt_base = dma_alloc_coherent(dev, size, &dev_base,
 839                                                         DT3155_COH_FLAGS);
 840         if (!mem->virt_base)
 841                 goto err_alloc_coherent;
 842         mem->bitmap = kzalloc(bitmap_size, GFP_KERNEL);
 843         if (!mem->bitmap)
 844                 goto err_bitmap;
 845
 846         /* coherent_dma_mask is already set to 32 bits */
 847         mem->device_base = dev_base;
 848         mem->size = pages;
 849         mem->flags = flags;
 850         dev->dma_mem = mem;
 851         return DMA_MEMORY_MAP;
 852
 853 err_bitmap:
 854         dma_free_coherent(dev, size, mem->virt_base, dev_base);
 855 err_alloc_coherent:
 856         kfree(mem);
 857 out:
 858         return 0;
 859 }
 860
 861 static void __devexit
 862 dt3155_free_coherent(struct device *dev)
 863 {
 864         struct dma_coherent_mem *mem = dev->dma_mem;
 865
 866         if (!mem)
 867                 return;
 868         dev->dma_mem = NULL;
 869         dma_free_coherent(dev, mem->size << PAGE_SHIFT,
 870                                         mem->virt_base, mem->device_base);
 871         kfree(mem->bitmap);
 872         kfree(mem);
 873 }
 874
 875 static int __devinit
 876 dt3155_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 877 {
 878         int err;
 879         struct dt3155_priv *pd;
 880
 881         err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
 882         if (err)
 883                 return -ENODEV;
 884         err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
 885         if (err)
 886                 return -ENODEV;
 887         pd = kzalloc(sizeof(*pd), GFP_KERNEL);
 888         if (!pd)
 889                 return -ENOMEM;
 890         pd->vdev = video_device_alloc();
 891         if (!pd->vdev)
 892                 goto err_video_device_alloc;
 893         *pd->vdev = dt3155_vdev;
 894         pci_set_drvdata(pdev, pd);    /* for use in dt3155_remove() */
 895         video_set_drvdata(pd->vdev, pd);  /* for use in video_fops */
 896         pd->users = 0;
 897         pd->pdev = pdev;
 898         INIT_LIST_HEAD(&pd->dmaq);
 899         mutex_init(&pd->mux);
 900         pd->vdev->lock = &pd->mux; /* for locking v4l2_file_operations */
 901         /* Locking in file operations other than ioctl should be done
 902            by the driver, not the V4L2 core.
 903            This driver needs auditing so that this flag can be removed. */
 904         set_bit(V4L2_FL_LOCK_ALL_FOPS, &pd->vdev->flags);
 905         spin_lock_init(&pd->lock);
 906         pd->csr2 = csr2_init;
 907         pd->config = config_init;
 908         err = pci_enable_device(pdev);
 909         if (err)
 910                 goto err_enable_dev;
 911         err = pci_request_region(pdev, 0, pci_name(pdev));
 912         if (err)
 913                 goto err_req_region;
 914         pd->regs = pci_iomap(pdev, 0, pci_resource_len(pd->pdev, 0));
 915         if (!pd->regs) {
 916                 err = -ENOMEM;
 917                 goto err_pci_iomap;
 918         }
 919         err = dt3155_init_board(pdev);
 920         if (err)
 921                 goto err_init_board;
 922         err = video_register_device(pd->vdev, VFL_TYPE_GRABBER, -1);
 923         if (err)
 924                 goto err_init_board;
 925         if (dt3155_alloc_coherent(&pdev->dev, DT3155_CHUNK_SIZE,
 926                                                         DMA_MEMORY_MAP))
 927                 dev_info(&pdev->dev, "preallocated 8 buffers\n");
 928         dev_info(&pdev->dev, "/dev/video%i is ready\n", pd->vdev->minor);
 929         return 0;  /*   success   */
 930
 931 err_init_board:
 932         pci_iounmap(pdev, pd->regs);
 933 err_pci_iomap:
 934         pci_release_region(pdev, 0);
 935 err_req_region:
 936         pci_disable_device(pdev);
 937 err_enable_dev:
 938         video_device_release(pd->vdev);
 939 err_video_device_alloc:
 940         kfree(pd);
 941         return err;
 942 }
 943
 944 static void __devexit
 945 dt3155_remove(struct pci_dev *pdev)
 946 {
 947         struct dt3155_priv *pd = pci_get_drvdata(pdev);
 948
 949         dt3155_free_coherent(&pdev->dev);
 950         video_unregister_device(pd->vdev);
 951         pci_iounmap(pdev, pd->regs);
 952         pci_release_region(pdev, 0);
 953         pci_disable_device(pdev);
 954         /*
 955          * video_device_release() is invoked automatically
 956          * see: struct video_device dt3155_vdev
 957          */
 958         kfree(pd);
 959 }
 960
 961 static DEFINE_PCI_DEVICE_TABLE(pci_ids) = {
 962         { PCI_DEVICE(DT3155_VENDOR_ID, DT3155_DEVICE_ID) },
 963         { 0, /* zero marks the end */ },
 964 };
 965 MODULE_DEVICE_TABLE(pci, pci_ids);
 966
 967 static struct pci_driver pci_driver = {
 968         .name = DT3155_NAME,
 969         .id_table = pci_ids,
 970         .probe = dt3155_probe,
 971         .remove = __devexit_p(dt3155_remove),
 972 };
 973
 974 static int __init
 975 dt3155_init_module(void)
 976 {
 977         return pci_register_driver(&pci_driver);
 978 }
 979
 980 static void __exit
 981 dt3155_exit_module(void)
 982 {
 983         pci_unregister_driver(&pci_driver);
 984 }
 985
 986 module_init(dt3155_init_module);
 987 module_exit(dt3155_exit_module);
 988
 989 MODULE_DESCRIPTION("video4linux pci-driver for dt3155 frame grabber");
 990 MODULE_AUTHOR("Marin Mitov <mitov@issp.bas.bg>");
 991 MODULE_VERSION(DT3155_VERSION);
 992 MODULE_LICENSE("GPL");