1#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 2 3#include <media/saa7146_vv.h> 4#include <linux/module.h> 5 6/****************************************************************************/ 7/* resource management functions, shamelessly stolen from saa7134 driver */ 8 9int saa7146_res_get(struct saa7146_fh *fh, unsigned int bit) 10{ 11 struct saa7146_dev *dev = fh->dev; 12 struct saa7146_vv *vv = dev->vv_data; 13 14 if (fh->resources & bit) { 15 DEB_D("already allocated! want: 0x%02x, cur:0x%02x\n", 16 bit, vv->resources); 17 /* have it already allocated */ 18 return 1; 19 } 20 21 /* is it free? */ 22 if (vv->resources & bit) { 23 DEB_D("locked! vv->resources:0x%02x, we want:0x%02x\n", 24 vv->resources, bit); 25 /* no, someone else uses it */ 26 return 0; 27 } 28 /* it's free, grab it */ 29 fh->resources |= bit; 30 vv->resources |= bit; 31 DEB_D("res: get 0x%02x, cur:0x%02x\n", bit, vv->resources); 32 return 1; 33} 34 35void saa7146_res_free(struct saa7146_fh *fh, unsigned int bits) 36{ 37 struct saa7146_dev *dev = fh->dev; 38 struct saa7146_vv *vv = dev->vv_data; 39 40 BUG_ON((fh->resources & bits) != bits); 41 42 fh->resources &= ~bits; 43 vv->resources &= ~bits; 44 DEB_D("res: put 0x%02x, cur:0x%02x\n", bits, vv->resources); 45} 46 47 48/********************************************************************************/ 49/* common dma functions */ 50 51void saa7146_dma_free(struct saa7146_dev *dev,struct videobuf_queue *q, 52 struct saa7146_buf *buf) 53{ 54 struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb); 55 DEB_EE("dev:%p, buf:%p\n", dev, buf); 56 57 BUG_ON(in_interrupt()); 58 59 videobuf_waiton(q, &buf->vb, 0, 0); 60 videobuf_dma_unmap(q->dev, dma); 61 videobuf_dma_free(dma); 62 buf->vb.state = VIDEOBUF_NEEDS_INIT; 63} 64 65 66/********************************************************************************/ 67/* common buffer functions */ 68 69int saa7146_buffer_queue(struct saa7146_dev *dev, 70 struct saa7146_dmaqueue *q, 71 struct saa7146_buf *buf) 72{ 73 assert_spin_locked(&dev->slock); 74 DEB_EE("dev:%p, dmaq:%p, buf:%p\n", dev, q, buf); 75 76 BUG_ON(!q); 77 78 if (NULL == q->curr) { 79 q->curr = buf; 80 DEB_D("immediately activating buffer %p\n", buf); 81 buf->activate(dev,buf,NULL); 82 } else { 83 list_add_tail(&buf->vb.queue,&q->queue); 84 buf->vb.state = VIDEOBUF_QUEUED; 85 DEB_D("adding buffer %p to queue. (active buffer present)\n", 86 buf); 87 } 88 return 0; 89} 90 91void saa7146_buffer_finish(struct saa7146_dev *dev, 92 struct saa7146_dmaqueue *q, 93 int state) 94{ 95 assert_spin_locked(&dev->slock); 96 DEB_EE("dev:%p, dmaq:%p, state:%d\n", dev, q, state); 97 DEB_EE("q->curr:%p\n", q->curr); 98 99 BUG_ON(!q->curr); 100 101 /* finish current buffer */ 102 if (NULL == q->curr) { 103 DEB_D("aiii. no current buffer\n"); 104 return; 105 } 106 107 q->curr->vb.state = state; 108 do_gettimeofday(&q->curr->vb.ts); 109 wake_up(&q->curr->vb.done); 110 111 q->curr = NULL; 112} 113 114void saa7146_buffer_next(struct saa7146_dev *dev, 115 struct saa7146_dmaqueue *q, int vbi) 116{ 117 struct saa7146_buf *buf,*next = NULL; 118 119 BUG_ON(!q); 120 121 DEB_INT("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi); 122 123 assert_spin_locked(&dev->slock); 124 if (!list_empty(&q->queue)) { 125 /* activate next one from queue */ 126 buf = list_entry(q->queue.next,struct saa7146_buf,vb.queue); 127 list_del(&buf->vb.queue); 128 if (!list_empty(&q->queue)) 129 next = list_entry(q->queue.next,struct saa7146_buf, vb.queue); 130 q->curr = buf; 131 DEB_INT("next buffer: buf:%p, prev:%p, next:%p\n", 132 buf, q->queue.prev, q->queue.next); 133 buf->activate(dev,buf,next); 134 } else { 135 DEB_INT("no next buffer. stopping.\n"); 136 if( 0 != vbi ) { 137 /* turn off video-dma3 */ 138 saa7146_write(dev,MC1, MASK_20); 139 } else { 140 /* nothing to do -- just prevent next video-dma1 transfer 141 by lowering the protection address */ 142 143 // fixme: fix this for vflip != 0 144 145 saa7146_write(dev, PROT_ADDR1, 0); 146 saa7146_write(dev, MC2, (MASK_02|MASK_18)); 147 148 /* write the address of the rps-program */ 149 saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle); 150 /* turn on rps */ 151 saa7146_write(dev, MC1, (MASK_12 | MASK_28)); 152 153/* 154 printk("vdma%d.base_even: 0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1)); 155 printk("vdma%d.base_odd: 0x%08x\n", 1,saa7146_read(dev,BASE_ODD1)); 156 printk("vdma%d.prot_addr: 0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1)); 157 printk("vdma%d.base_page: 0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1)); 158 printk("vdma%d.pitch: 0x%08x\n", 1,saa7146_read(dev,PITCH1)); 159 printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1)); 160*/ 161 } 162 del_timer(&q->timeout); 163 } 164} 165 166void saa7146_buffer_timeout(unsigned long data) 167{ 168 struct saa7146_dmaqueue *q = (struct saa7146_dmaqueue*)data; 169 struct saa7146_dev *dev = q->dev; 170 unsigned long flags; 171 172 DEB_EE("dev:%p, dmaq:%p\n", dev, q); 173 174 spin_lock_irqsave(&dev->slock,flags); 175 if (q->curr) { 176 DEB_D("timeout on %p\n", q->curr); 177 saa7146_buffer_finish(dev,q,VIDEOBUF_ERROR); 178 } 179 180 /* we don't restart the transfer here like other drivers do. when 181 a streaming capture is disabled, the timeout function will be 182 called for the current buffer. if we activate the next buffer now, 183 we mess up our capture logic. if a timeout occurs on another buffer, 184 then something is seriously broken before, so no need to buffer the 185 next capture IMHO... */ 186/* 187 saa7146_buffer_next(dev,q); 188*/ 189 spin_unlock_irqrestore(&dev->slock,flags); 190} 191 192/********************************************************************************/ 193/* file operations */ 194 195static int fops_open(struct file *file) 196{ 197 struct video_device *vdev = video_devdata(file); 198 struct saa7146_dev *dev = video_drvdata(file); 199 struct saa7146_fh *fh = NULL; 200 int result = 0; 201 202 enum v4l2_buf_type type; 203 204 DEB_EE("file:%p, dev:%s\n", file, video_device_node_name(vdev)); 205 206 if (mutex_lock_interruptible(&saa7146_devices_lock)) 207 return -ERESTARTSYS; 208 209 DEB_D("using: %p\n", dev); 210 211 type = vdev->vfl_type == VFL_TYPE_GRABBER 212 ? V4L2_BUF_TYPE_VIDEO_CAPTURE 213 : V4L2_BUF_TYPE_VBI_CAPTURE; 214 215 /* check if an extension is registered */ 216 if( NULL == dev->ext ) { 217 DEB_S("no extension registered for this device\n"); 218 result = -ENODEV; 219 goto out; 220 } 221 222 /* allocate per open data */ 223 fh = kzalloc(sizeof(*fh),GFP_KERNEL); 224 if (NULL == fh) { 225 DEB_S("cannot allocate memory for per open data\n"); 226 result = -ENOMEM; 227 goto out; 228 } 229 230 file->private_data = fh; 231 fh->dev = dev; 232 fh->type = type; 233 234 if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) { 235 DEB_S("initializing vbi...\n"); 236 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE) 237 result = saa7146_vbi_uops.open(dev,file); 238 if (dev->ext_vv_data->vbi_fops.open) 239 dev->ext_vv_data->vbi_fops.open(file); 240 } else { 241 DEB_S("initializing video...\n"); 242 result = saa7146_video_uops.open(dev,file); 243 } 244 245 if (0 != result) { 246 goto out; 247 } 248 249 if( 0 == try_module_get(dev->ext->module)) { 250 result = -EINVAL; 251 goto out; 252 } 253 254 result = 0; 255out: 256 if (fh && result != 0) { 257 kfree(fh); 258 file->private_data = NULL; 259 } 260 mutex_unlock(&saa7146_devices_lock); 261 return result; 262} 263 264static int fops_release(struct file *file) 265{ 266 struct saa7146_fh *fh = file->private_data; 267 struct saa7146_dev *dev = fh->dev; 268 269 DEB_EE("file:%p\n", file); 270 271 if (mutex_lock_interruptible(&saa7146_devices_lock)) 272 return -ERESTARTSYS; 273 274 if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) { 275 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE) 276 saa7146_vbi_uops.release(dev,file); 277 if (dev->ext_vv_data->vbi_fops.release) 278 dev->ext_vv_data->vbi_fops.release(file); 279 } else { 280 saa7146_video_uops.release(dev,file); 281 } 282 283 module_put(dev->ext->module); 284 file->private_data = NULL; 285 kfree(fh); 286 287 mutex_unlock(&saa7146_devices_lock); 288 289 return 0; 290} 291 292static int fops_mmap(struct file *file, struct vm_area_struct * vma) 293{ 294 struct saa7146_fh *fh = file->private_data; 295 struct videobuf_queue *q; 296 297 switch (fh->type) { 298 case V4L2_BUF_TYPE_VIDEO_CAPTURE: { 299 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n", 300 file, vma); 301 q = &fh->video_q; 302 break; 303 } 304 case V4L2_BUF_TYPE_VBI_CAPTURE: { 305 DEB_EE("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n", 306 file, vma); 307 q = &fh->vbi_q; 308 break; 309 } 310 default: 311 BUG(); 312 return 0; 313 } 314 315 return videobuf_mmap_mapper(q,vma); 316} 317 318static unsigned int fops_poll(struct file *file, struct poll_table_struct *wait) 319{ 320 struct saa7146_fh *fh = file->private_data; 321 struct videobuf_buffer *buf = NULL; 322 struct videobuf_queue *q; 323 324 DEB_EE("file:%p, poll:%p\n", file, wait); 325 326 if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type) { 327 if( 0 == fh->vbi_q.streaming ) 328 return videobuf_poll_stream(file, &fh->vbi_q, wait); 329 q = &fh->vbi_q; 330 } else { 331 DEB_D("using video queue\n"); 332 q = &fh->video_q; 333 } 334 335 if (!list_empty(&q->stream)) 336 buf = list_entry(q->stream.next, struct videobuf_buffer, stream); 337 338 if (!buf) { 339 DEB_D("buf == NULL!\n"); 340 return POLLERR; 341 } 342 343 poll_wait(file, &buf->done, wait); 344 if (buf->state == VIDEOBUF_DONE || buf->state == VIDEOBUF_ERROR) { 345 DEB_D("poll succeeded!\n"); 346 return POLLIN|POLLRDNORM; 347 } 348 349 DEB_D("nothing to poll for, buf->state:%d\n", buf->state); 350 return 0; 351} 352 353static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos) 354{ 355 struct saa7146_fh *fh = file->private_data; 356 357 switch (fh->type) { 358 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 359/* 360 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun", 361 file, data, (unsigned long)count); 362*/ 363 return saa7146_video_uops.read(file,data,count,ppos); 364 case V4L2_BUF_TYPE_VBI_CAPTURE: 365/* 366 DEB_EE("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n", 367 file, data, (unsigned long)count); 368*/ 369 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE) 370 return saa7146_vbi_uops.read(file,data,count,ppos); 371 return -EINVAL; 372 default: 373 BUG(); 374 return 0; 375 } 376} 377 378static ssize_t fops_write(struct file *file, const char __user *data, size_t count, loff_t *ppos) 379{ 380 struct saa7146_fh *fh = file->private_data; 381 382 switch (fh->type) { 383 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 384 return -EINVAL; 385 case V4L2_BUF_TYPE_VBI_CAPTURE: 386 if (fh->dev->ext_vv_data->vbi_fops.write) 387 return fh->dev->ext_vv_data->vbi_fops.write(file, data, count, ppos); 388 else 389 return -EINVAL; 390 default: 391 BUG(); 392 return -EINVAL; 393 } 394} 395 396static const struct v4l2_file_operations video_fops = 397{ 398 .owner = THIS_MODULE, 399 .open = fops_open, 400 .release = fops_release, 401 .read = fops_read, 402 .write = fops_write, 403 .poll = fops_poll, 404 .mmap = fops_mmap, 405 .unlocked_ioctl = video_ioctl2, 406}; 407 408static void vv_callback(struct saa7146_dev *dev, unsigned long status) 409{ 410 u32 isr = status; 411 412 DEB_INT("dev:%p, isr:0x%08x\n", dev, (u32)status); 413 414 if (0 != (isr & (MASK_27))) { 415 DEB_INT("irq: RPS0 (0x%08x)\n", isr); 416 saa7146_video_uops.irq_done(dev,isr); 417 } 418 419 if (0 != (isr & (MASK_28))) { 420 u32 mc2 = saa7146_read(dev, MC2); 421 if( 0 != (mc2 & MASK_15)) { 422 DEB_INT("irq: RPS1 vbi workaround (0x%08x)\n", isr); 423 wake_up(&dev->vv_data->vbi_wq); 424 saa7146_write(dev,MC2, MASK_31); 425 return; 426 } 427 DEB_INT("irq: RPS1 (0x%08x)\n", isr); 428 saa7146_vbi_uops.irq_done(dev,isr); 429 } 430} 431 432int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv) 433{ 434 struct saa7146_vv *vv; 435 int err; 436 437 err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev); 438 if (err) 439 return err; 440 441 vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL); 442 if (vv == NULL) { 443 ERR("out of memory. aborting.\n"); 444 return -ENOMEM; 445 } 446 ext_vv->ops = saa7146_video_ioctl_ops; 447 ext_vv->core_ops = &saa7146_video_ioctl_ops; 448 449 DEB_EE("dev:%p\n", dev); 450 451 /* set default values for video parts of the saa7146 */ 452 saa7146_write(dev, BCS_CTRL, 0x80400040); 453 454 /* enable video-port pins */ 455 saa7146_write(dev, MC1, (MASK_10 | MASK_26)); 456 457 /* save per-device extension data (one extension can 458 handle different devices that might need different 459 configuration data) */ 460 dev->ext_vv_data = ext_vv; 461 462 vv->d_clipping.cpu_addr = pci_alloc_consistent(dev->pci, SAA7146_CLIPPING_MEM, &vv->d_clipping.dma_handle); 463 if( NULL == vv->d_clipping.cpu_addr ) { 464 ERR("out of memory. aborting.\n"); 465 kfree(vv); 466 return -1; 467 } 468 memset(vv->d_clipping.cpu_addr, 0x0, SAA7146_CLIPPING_MEM); 469 470 saa7146_video_uops.init(dev,vv); 471 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE) 472 saa7146_vbi_uops.init(dev,vv); 473 474 dev->vv_data = vv; 475 dev->vv_callback = &vv_callback; 476 477 return 0; 478} 479EXPORT_SYMBOL_GPL(saa7146_vv_init); 480 481int saa7146_vv_release(struct saa7146_dev* dev) 482{ 483 struct saa7146_vv *vv = dev->vv_data; 484 485 DEB_EE("dev:%p\n", dev); 486 487 v4l2_device_unregister(&dev->v4l2_dev); 488 pci_free_consistent(dev->pci, SAA7146_CLIPPING_MEM, vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle); 489 kfree(vv); 490 dev->vv_data = NULL; 491 dev->vv_callback = NULL; 492 493 return 0; 494} 495EXPORT_SYMBOL_GPL(saa7146_vv_release); 496 497int saa7146_register_device(struct video_device **vid, struct saa7146_dev* dev, 498 char *name, int type) 499{ 500 struct video_device *vfd; 501 int err; 502 int i; 503 504 DEB_EE("dev:%p, name:'%s', type:%d\n", dev, name, type); 505 506 // released by vfd->release 507 vfd = video_device_alloc(); 508 if (vfd == NULL) 509 return -ENOMEM; 510 511 vfd->fops = &video_fops; 512 vfd->ioctl_ops = &dev->ext_vv_data->ops; 513 vfd->release = video_device_release; 514 vfd->lock = &dev->v4l2_lock; 515 vfd->tvnorms = 0; 516 for (i = 0; i < dev->ext_vv_data->num_stds; i++) 517 vfd->tvnorms |= dev->ext_vv_data->stds[i].id; 518 strlcpy(vfd->name, name, sizeof(vfd->name)); 519 video_set_drvdata(vfd, dev); 520 521 err = video_register_device(vfd, type, -1); 522 if (err < 0) { 523 ERR("cannot register v4l2 device. skipping.\n"); 524 video_device_release(vfd); 525 return err; 526 } 527 528 pr_info("%s: registered device %s [v4l2]\n", 529 dev->name, video_device_node_name(vfd)); 530 531 *vid = vfd; 532 return 0; 533} 534EXPORT_SYMBOL_GPL(saa7146_register_device); 535 536int saa7146_unregister_device(struct video_device **vid, struct saa7146_dev* dev) 537{ 538 DEB_EE("dev:%p\n", dev); 539 540 video_unregister_device(*vid); 541 *vid = NULL; 542 543 return 0; 544} 545EXPORT_SYMBOL_GPL(saa7146_unregister_device); 546 547static int __init saa7146_vv_init_module(void) 548{ 549 return 0; 550} 551 552 553static void __exit saa7146_vv_cleanup_module(void) 554{ 555} 556 557module_init(saa7146_vv_init_module); 558module_exit(saa7146_vv_cleanup_module); 559 560MODULE_AUTHOR("Michael Hunold <michael@mihu.de>"); 561MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware"); 562MODULE_LICENSE("GPL"); 563