Programming Languages Research Group: Git - firefly-linux-kernel-4.4.55.git/blob

1 #include <media/saa7146_vv.h>

2 #include <linux/version.h>

4 #define BOARD_CAN_DO_VBI(dev) (dev->revision != 0 && dev->vv_data->vbi_minor != -1)

6 /****************************************************************************/

7 /* resource management functions, shamelessly stolen from saa7134 driver */

9 int 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;

14 if (fh->resources & bit) {

15 DEB_D(("already allocated! want: 0x%02x, cur:0x%02x\n",bit,vv->resources));

16 /* have it already allocated */

17 return 1;

18 }

20 /* is it free? */

21 down(&dev->lock);

22 if (vv->resources & bit) {

23 DEB_D(("locked! vv->resources:0x%02x, we want:0x%02x\n",vv->resources,bit));

24 /* no, someone else uses it */

25 up(&dev->lock);

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 up(&dev->lock);

33 return 1;

34 }

36 void saa7146_res_free(struct saa7146_fh *fh, unsigned int bits)

37 {

38 struct saa7146_dev *dev = fh->dev;

39 struct saa7146_vv *vv = dev->vv_data;

41 if ((fh->resources & bits) != bits)

42 BUG();

44 down(&dev->lock);

45 fh->resources &= ~bits;

46 vv->resources &= ~bits;

47 DEB_D(("res: put 0x%02x, cur:0x%02x\n",bits,vv->resources));

48 up(&dev->lock);

49 }

52 /********************************************************************************/

53 /* common dma functions */

55 void saa7146_dma_free(struct saa7146_dev *dev,struct saa7146_buf *buf)

56 {

57 DEB_EE(("dev:%p, buf:%p\n",dev,buf));

59 if (in_interrupt())

60 BUG();

62 videobuf_waiton(&buf->vb,0,0);

63 videobuf_dma_pci_unmap(dev->pci, &buf->vb.dma);

64 videobuf_dma_free(&buf->vb.dma);

65 buf->vb.state = STATE_NEEDS_INIT;

66 }

69 /********************************************************************************/

70 /* common buffer functions */

72 int saa7146_buffer_queue(struct saa7146_dev *dev,

73 struct saa7146_dmaqueue *q,

74 struct saa7146_buf *buf)

75 {

76 assert_spin_locked(&dev->slock);

77 DEB_EE(("dev:%p, dmaq:%p, buf:%p\n", dev, q, buf));

79 BUG_ON(!q);

81 if (NULL == q->curr) {

82 q->curr = buf;

83 DEB_D(("immediately activating buffer %p\n", buf));

84 buf->activate(dev,buf,NULL);

85 } else {

86 list_add_tail(&buf->vb.queue,&q->queue);

87 buf->vb.state = STATE_QUEUED;

88 DEB_D(("adding buffer %p to queue. (active buffer present)\n", buf));

89 }

90 return 0;

91 }

93 void saa7146_buffer_finish(struct saa7146_dev *dev,

94 struct saa7146_dmaqueue *q,

95 int state)

96 {

97 assert_spin_locked(&dev->slock);

98 DEB_EE(("dev:%p, dmaq:%p, state:%d\n", dev, q, state));

99 DEB_EE(("q->curr:%p\n",q->curr));

100

101 BUG_ON(!q->curr);

102

103 /* finish current buffer */

104 if (NULL == q->curr) {

105 DEB_D(("aiii. no current buffer\n"));

106 return;

107 }

108

109 q->curr->vb.state = state;

110 do_gettimeofday(&q->curr->vb.ts);

111 wake_up(&q->curr->vb.done);

112

113 q->curr = NULL;

114 }

115

116 void saa7146_buffer_next(struct saa7146_dev *dev,

117 struct saa7146_dmaqueue *q, int vbi)

118 {

119 struct saa7146_buf *buf,*next = NULL;

120

121 BUG_ON(!q);

122

123 DEB_INT(("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi));

124

125 assert_spin_locked(&dev->slock);

126 if (!list_empty(&q->queue)) {

127 /* activate next one from queue */

128 buf = list_entry(q->queue.next,struct saa7146_buf,vb.queue);

129 list_del(&buf->vb.queue);

130 if (!list_empty(&q->queue))

131 next = list_entry(q->queue.next,struct saa7146_buf, vb.queue);

132 q->curr = buf;

133 DEB_INT(("next buffer: buf:%p, prev:%p, next:%p\n", buf, q->queue.prev,q->queue.next));

134 buf->activate(dev,buf,next);

135 } else {

136 DEB_INT(("no next buffer. stopping.\n"));

137 if( 0 != vbi ) {

138 /* turn off video-dma3 */

139 saa7146_write(dev,MC1, MASK_20);

140 } else {

141 /* nothing to do -- just prevent next video-dma1 transfer

142 by lowering the protection address */

143

144 // fixme: fix this for vflip != 0

145

146 saa7146_write(dev, PROT_ADDR1, 0);

147 saa7146_write(dev, MC2, (MASK_02|MASK_18));

148

149 /* write the address of the rps-program */

150 saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle);

151 /* turn on rps */

152 saa7146_write(dev, MC1, (MASK_12 | MASK_28));

153

154 /*

155 printk("vdma%d.base_even: 0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1));

156 printk("vdma%d.base_odd: 0x%08x\n", 1,saa7146_read(dev,BASE_ODD1));

157 printk("vdma%d.prot_addr: 0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1));

158 printk("vdma%d.base_page: 0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1));

159 printk("vdma%d.pitch: 0x%08x\n", 1,saa7146_read(dev,PITCH1));

160 printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1));

161 */

162 }

163 del_timer(&q->timeout);

164 }

165 }

166

167 void saa7146_buffer_timeout(unsigned long data)

168 {

169 struct saa7146_dmaqueue *q = (struct saa7146_dmaqueue*)data;

170 struct saa7146_dev *dev = q->dev;

171 unsigned long flags;

172

173 DEB_EE(("dev:%p, dmaq:%p\n", dev, q));

174

175 spin_lock_irqsave(&dev->slock,flags);

176 if (q->curr) {

177 DEB_D(("timeout on %p\n", q->curr));

178 saa7146_buffer_finish(dev,q,STATE_ERROR);

179 }

180

181 /* we don't restart the transfer here like other drivers do. when

182 a streaming capture is disabled, the timeout function will be

183 called for the current buffer. if we activate the next buffer now,

184 we mess up our capture logic. if a timeout occurs on another buffer,

185 then something is seriously broken before, so no need to buffer the

186 next capture IMHO... */

187 /*

188 saa7146_buffer_next(dev,q);

189 */

190 spin_unlock_irqrestore(&dev->slock,flags);

191 }

192

193 /********************************************************************************/

194 /* file operations */

195

196 static int fops_open(struct inode *inode, struct file *file)

197 {

198 unsigned int minor = iminor(inode);

199 struct saa7146_dev *h = NULL, *dev = NULL;

200 struct list_head *list;

201 struct saa7146_fh *fh = NULL;

202 int result = 0;

203

204 enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE;

205

206 DEB_EE(("inode:%p, file:%p, minor:%d\n",inode,file,minor));

207

208 if (down_interruptible(&saa7146_devices_lock))

209 return -ERESTARTSYS;

210

211 list_for_each(list,&saa7146_devices) {

212 h = list_entry(list, struct saa7146_dev, item);

213 if( NULL == h->vv_data ) {

214 DEB_D(("device %p has not registered video devices.\n",h));

215 continue;

216 }

217 DEB_D(("trying: %p @ major %d,%d\n",h,h->vv_data->video_minor,h->vv_data->vbi_minor));

218

219 if (h->vv_data->video_minor == minor) {

220 dev = h;

221 }

222 if (h->vv_data->vbi_minor == minor) {

223 type = V4L2_BUF_TYPE_VBI_CAPTURE;

224 dev = h;

225 }

226 }

227 if (NULL == dev) {

228 DEB_S(("no such video device.\n"));

229 result = -ENODEV;

230 goto out;

231 }

232

233 DEB_D(("using: %p\n",dev));

234

235 /* check if an extension is registered */

236 if( NULL == dev->ext ) {

237 DEB_S(("no extension registered for this device.\n"));

238 result = -ENODEV;

239 goto out;

240 }

241

242 /* allocate per open data */

243 fh = kmalloc(sizeof(*fh),GFP_KERNEL);

244 if (NULL == fh) {

245 DEB_S(("cannot allocate memory for per open data.\n"));

246 result = -ENOMEM;

247 goto out;

248 }

249 memset(fh,0,sizeof(*fh));

250

251 file->private_data = fh;

252 fh->dev = dev;

253 fh->type = type;

254

255 if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {

256 DEB_S(("initializing vbi...\n"));

257 result = saa7146_vbi_uops.open(dev,file);

258 } else {

259 DEB_S(("initializing video...\n"));

260 result = saa7146_video_uops.open(dev,file);

261 }

262

263 if (0 != result) {

264 goto out;

265 }

266

267 if( 0 == try_module_get(dev->ext->module)) {

268 result = -EINVAL;

269 goto out;

270 }

271

272 result = 0;

273 out:

274 if( fh != 0 && result != 0 ) {

275 kfree(fh);

276 file->private_data = NULL;

277 }

278 up(&saa7146_devices_lock);

279 return result;

280 }

281

282 static int fops_release(struct inode *inode, struct file *file)

283 {

284 struct saa7146_fh *fh = file->private_data;

285 struct saa7146_dev *dev = fh->dev;

286

287 DEB_EE(("inode:%p, file:%p\n",inode,file));

288

289 if (down_interruptible(&saa7146_devices_lock))

290 return -ERESTARTSYS;

291

292 if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {

293 saa7146_vbi_uops.release(dev,file);

294 } else {

295 saa7146_video_uops.release(dev,file);

296 }

297

298 module_put(dev->ext->module);

299 file->private_data = NULL;

300 kfree(fh);

301

302 up(&saa7146_devices_lock);

303

304 return 0;

305 }

306

307 int saa7146_video_do_ioctl(struct inode *inode, struct file *file, unsigned int cmd, void *arg);

308 static int fops_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)

309 {

310 /*

311 DEB_EE(("inode:%p, file:%p, cmd:%d, arg:%li\n",inode, file, cmd, arg));

312 */

313 return video_usercopy(inode, file, cmd, arg, saa7146_video_do_ioctl);

314 }

315

316 static int fops_mmap(struct file *file, struct vm_area_struct * vma)

317 {

318 struct saa7146_fh *fh = file->private_data;

319 struct videobuf_queue *q;

320

321 switch (fh->type) {

322 case V4L2_BUF_TYPE_VIDEO_CAPTURE: {

323 DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n",file, vma));

324 q = &fh->video_q;

325 break;

326 }

327 case V4L2_BUF_TYPE_VBI_CAPTURE: {

328 DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n",file, vma));

329 q = &fh->vbi_q;

330 break;

331 }

332 default:

333 BUG();

334 return 0;

335 }

336 return videobuf_mmap_mapper(q,vma);

337 }

338

339 static unsigned int fops_poll(struct file *file, struct poll_table_struct *wait)

340 {

341 struct saa7146_fh *fh = file->private_data;

342 struct videobuf_buffer *buf = NULL;

343 struct videobuf_queue *q;

344

345 DEB_EE(("file:%p, poll:%p\n",file, wait));

346

347 if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type) {

348 if( 0 == fh->vbi_q.streaming )

349 return videobuf_poll_stream(file, &fh->vbi_q, wait);

350 q = &fh->vbi_q;

351 } else {

352 DEB_D(("using video queue.\n"));

353 q = &fh->video_q;

354 }

355

356 if (!list_empty(&q->stream))

357 buf = list_entry(q->stream.next, struct videobuf_buffer, stream);

358

359 if (!buf) {

360 DEB_D(("buf == NULL!\n"));

361 return POLLERR;

362 }

363

364 poll_wait(file, &buf->done, wait);

365 if (buf->state == STATE_DONE || buf->state == STATE_ERROR) {

366 DEB_D(("poll succeeded!\n"));

367 return POLLIN|POLLRDNORM;

368 }

369

370 DEB_D(("nothing to poll for, buf->state:%d\n",buf->state));

371 return 0;

372 }

373

374 static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos)

375 {

376 struct saa7146_fh *fh = file->private_data;

377

378 switch (fh->type) {

379 case V4L2_BUF_TYPE_VIDEO_CAPTURE: {

380 // DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun", file, data, (unsigned long)count));

381 return saa7146_video_uops.read(file,data,count,ppos);

382 }

383 case V4L2_BUF_TYPE_VBI_CAPTURE: {

384 // DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n", file, data, (unsigned long)count));

385 return saa7146_vbi_uops.read(file,data,count,ppos);

386 }

387 break;

388 default:

389 BUG();

390 return 0;

391 }

392 }

393

394 static struct file_operations video_fops =

395 {

396 .owner = THIS_MODULE,

397 .open = fops_open,

398 .release = fops_release,

399 .read = fops_read,

400 .poll = fops_poll,

401 .mmap = fops_mmap,

402 .ioctl = fops_ioctl,

403 .llseek = no_llseek,

404 };

405

406 static void vv_callback(struct saa7146_dev *dev, unsigned long status)

407 {

408 u32 isr = status;

409

410 DEB_INT(("dev:%p, isr:0x%08x\n",dev,(u32)status));

411

412 if (0 != (isr & (MASK_27))) {

413 DEB_INT(("irq: RPS0 (0x%08x).\n",isr));

414 saa7146_video_uops.irq_done(dev,isr);

415 }

416

417 if (0 != (isr & (MASK_28))) {

418 u32 mc2 = saa7146_read(dev, MC2);

419 if( 0 != (mc2 & MASK_15)) {

420 DEB_INT(("irq: RPS1 vbi workaround (0x%08x).\n",isr));

421 wake_up(&dev->vv_data->vbi_wq);

422 saa7146_write(dev,MC2, MASK_31);

423 return;

424 }

425 DEB_INT(("irq: RPS1 (0x%08x).\n",isr));

426 saa7146_vbi_uops.irq_done(dev,isr);

427 }

428 }

429

430 static struct video_device device_template =

431 {

432 .hardware = VID_HARDWARE_SAA7146,

433 .fops = &video_fops,

434 .minor = -1,

435 };

436

437 int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)

438 {

439 struct saa7146_vv *vv = kmalloc (sizeof(struct saa7146_vv),GFP_KERNEL);

440 if( NULL == vv ) {

441 ERR(("out of memory. aborting.\n"));

442 return -1;

443 }

444 memset(vv, 0x0, sizeof(*vv));

445

446 DEB_EE(("dev:%p\n",dev));

447

448 /* set default values for video parts of the saa7146 */

449 saa7146_write(dev, BCS_CTRL, 0x80400040);

450

451 /* enable video-port pins */

452 saa7146_write(dev, MC1, (MASK_10 | MASK_26));

453

454 /* save per-device extension data (one extension can

455 handle different devices that might need different

456 configuration data) */

457 dev->ext_vv_data = ext_vv;

458

459 vv->video_minor = -1;

460 vv->vbi_minor = -1;

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 saa7146_vbi_uops.init(dev,vv);

472

473 dev->vv_data = vv;

474 dev->vv_callback = &vv_callback;

475

476 return 0;

477 }

478

479 int saa7146_vv_release(struct saa7146_dev* dev)

480 {

481 struct saa7146_vv *vv = dev->vv_data;

482

483 DEB_EE(("dev:%p\n",dev));

484

485 pci_free_consistent(dev->pci, SAA7146_RPS_MEM, vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle);

486 kfree(vv);

487 dev->vv_data = NULL;

488 dev->vv_callback = NULL;

489

490 return 0;

491 }

492

493 int saa7146_register_device(struct video_device **vid, struct saa7146_dev* dev,

494 char *name, int type)

495 {

496 struct saa7146_vv *vv = dev->vv_data;

497 struct video_device *vfd;

498

499 DEB_EE(("dev:%p, name:'%s', type:%d\n",dev,name,type));

500

501 // released by vfd->release

502 vfd = video_device_alloc();

503 if (vfd == NULL)

504 return -ENOMEM;

505

506 memcpy(vfd, &device_template, sizeof(struct video_device));

507 strlcpy(vfd->name, name, sizeof(vfd->name));

508 vfd->release = video_device_release;

509 vfd->priv = dev;

510

511 // fixme: -1 should be an insmod parameter *for the extension* (like "video_nr");

512 if (video_register_device(vfd, type, -1) < 0) {

513 ERR(("cannot register v4l2 device. skipping.\n"));

514 return -1;

515 }

516

517 if( VFL_TYPE_GRABBER == type ) {

518 vv->video_minor = vfd->minor;

519 INFO(("%s: registered device video%d [v4l2]\n",

520 dev->name, vfd->minor & 0x1f));

521 } else {

522 vv->vbi_minor = vfd->minor;

523 INFO(("%s: registered device vbi%d [v4l2]\n",

524 dev->name, vfd->minor & 0x1f));

525 }

526

527 *vid = vfd;

528 return 0;

529 }

530

531 int saa7146_unregister_device(struct video_device **vid, struct saa7146_dev* dev)

532 {

533 struct saa7146_vv *vv = dev->vv_data;

534

535 DEB_EE(("dev:%p\n",dev));

536

537 if( VFL_TYPE_GRABBER == (*vid)->type ) {

538 vv->video_minor = -1;

539 } else {

540 vv->vbi_minor = -1;

541 }

542

543 video_unregister_device(*vid);

544 *vid = NULL;

545

546 return 0;

547 }

548

549 static int __init saa7146_vv_init_module(void)

550 {

551 return 0;

552 }

553

554

555 static void __exit saa7146_vv_cleanup_module(void)

556 {

557 }

558

559 module_init(saa7146_vv_init_module);

560 module_exit(saa7146_vv_cleanup_module);

561

562 MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");

563 MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware");

564 MODULE_LICENSE("GPL");