1 #include <media/saa7146_vv.h> 2 3 static int vbi_pixel_to_capture = 720 * 2; 4 5 static int vbi_workaround(struct saa7146_dev *dev) 6 { 7 struct saa7146_vv *vv = dev->vv_data; 8 9 u32 *cpu; 10 dma_addr_t dma_addr; 11 12 int count = 0; 13 int i; 14 15 DECLARE_WAITQUEUE(wait, current); 16 17 DEB_VBI("dev:%p\n", dev); 18 19 /* once again, a bug in the saa7146: the brs acquisition 20 is buggy and especially the BXO-counter does not work 21 as specified. there is this workaround, but please 22 don't let me explain it. ;-) */ 23 24 cpu = pci_alloc_consistent(dev->pci, 4096, &dma_addr); 25 if (NULL == cpu) 26 return -ENOMEM; 27 28 /* setup some basic programming, just for the workaround */ 29 saa7146_write(dev, BASE_EVEN3, dma_addr); 30 saa7146_write(dev, BASE_ODD3, dma_addr+vbi_pixel_to_capture); 31 saa7146_write(dev, PROT_ADDR3, dma_addr+4096); 32 saa7146_write(dev, PITCH3, vbi_pixel_to_capture); 33 saa7146_write(dev, BASE_PAGE3, 0x0); 34 saa7146_write(dev, NUM_LINE_BYTE3, (2<<16)|((vbi_pixel_to_capture)<<0)); 35 saa7146_write(dev, MC2, MASK_04|MASK_20); 36 37 /* load brs-control register */ 38 WRITE_RPS1(CMD_WR_REG | (1 << 8) | (BRS_CTRL/4)); 39 /* BXO = 1h, BRS to outbound */ 40 WRITE_RPS1(0xc000008c); 41 /* wait for vbi_a or vbi_b*/ 42 if ( 0 != (SAA7146_USE_PORT_B_FOR_VBI & dev->ext_vv_data->flags)) { 43 DEB_D("...using port b\n"); 44 WRITE_RPS1(CMD_PAUSE | CMD_OAN | CMD_SIG1 | CMD_E_FID_B); 45 WRITE_RPS1(CMD_PAUSE | CMD_OAN | CMD_SIG1 | CMD_O_FID_B); 46 /* 47 WRITE_RPS1(CMD_PAUSE | MASK_09); 48 */ 49 } else { 50 DEB_D("...using port a\n"); 51 WRITE_RPS1(CMD_PAUSE | MASK_10); 52 } 53 /* upload brs */ 54 WRITE_RPS1(CMD_UPLOAD | MASK_08); 55 /* load brs-control register */ 56 WRITE_RPS1(CMD_WR_REG | (1 << 8) | (BRS_CTRL/4)); 57 /* BYO = 1, BXO = NQBIL (=1728 for PAL, for NTSC this is 858*2) - NumByte3 (=1440) = 288 */ 58 WRITE_RPS1(((1728-(vbi_pixel_to_capture)) << 7) | MASK_19); 59 /* wait for brs_done */ 60 WRITE_RPS1(CMD_PAUSE | MASK_08); 61 /* upload brs */ 62 WRITE_RPS1(CMD_UPLOAD | MASK_08); 63 /* load video-dma3 NumLines3 and NumBytes3 */ 64 WRITE_RPS1(CMD_WR_REG | (1 << 8) | (NUM_LINE_BYTE3/4)); 65 /* dev->vbi_count*2 lines, 720 pixel (= 1440 Bytes) */ 66 WRITE_RPS1((2 << 16) | (vbi_pixel_to_capture)); 67 /* load brs-control register */ 68 WRITE_RPS1(CMD_WR_REG | (1 << 8) | (BRS_CTRL/4)); 69 /* Set BRS right: note: this is an experimental value for BXO (=> PAL!) */ 70 WRITE_RPS1((540 << 7) | (5 << 19)); // 5 == vbi_start 71 /* wait for brs_done */ 72 WRITE_RPS1(CMD_PAUSE | MASK_08); 73 /* upload brs and video-dma3*/ 74 WRITE_RPS1(CMD_UPLOAD | MASK_08 | MASK_04); 75 /* load mc2 register: enable dma3 */ 76 WRITE_RPS1(CMD_WR_REG | (1 << 8) | (MC1/4)); 77 WRITE_RPS1(MASK_20 | MASK_04); 78 /* generate interrupt */ 79 WRITE_RPS1(CMD_INTERRUPT); 80 /* stop rps1 */ 81 WRITE_RPS1(CMD_STOP); 82 83 /* we have to do the workaround twice to be sure that 84 everything is ok */ 85 for(i = 0; i < 2; i++) { 86 87 /* indicate to the irq handler that we do the workaround */ 88 saa7146_write(dev, MC2, MASK_31|MASK_15); 89 90 saa7146_write(dev, NUM_LINE_BYTE3, (1<<16)|(2<<0)); 91 saa7146_write(dev, MC2, MASK_04|MASK_20); 92 93 /* enable rps1 irqs */ 94 SAA7146_IER_ENABLE(dev,MASK_28); 95 96 /* prepare to wait to be woken up by the irq-handler */ 97 add_wait_queue(&vv->vbi_wq, &wait); 98 current->state = TASK_INTERRUPTIBLE; 99 100 /* start rps1 to enable workaround */ 101 saa7146_write(dev, RPS_ADDR1, dev->d_rps1.dma_handle); 102 saa7146_write(dev, MC1, (MASK_13 | MASK_29)); 103 104 schedule(); 105 106 DEB_VBI("brs bug workaround %d/1\n", i); 107 108 remove_wait_queue(&vv->vbi_wq, &wait); 109 current->state = TASK_RUNNING; 110 111 /* disable rps1 irqs */ 112 SAA7146_IER_DISABLE(dev,MASK_28); 113 114 /* stop video-dma3 */ 115 saa7146_write(dev, MC1, MASK_20); 116 117 if(signal_pending(current)) { 118 119 DEB_VBI("aborted (rps:0x%08x)\n", 120 saa7146_read(dev, RPS_ADDR1)); 121 122 /* stop rps1 for sure */ 123 saa7146_write(dev, MC1, MASK_29); 124 125 pci_free_consistent(dev->pci, 4096, cpu, dma_addr); 126 return -EINTR; 127 } 128 } 129 130 pci_free_consistent(dev->pci, 4096, cpu, dma_addr); 131 return 0; 132 } 133 134 static void saa7146_set_vbi_capture(struct saa7146_dev *dev, struct saa7146_buf *buf, struct saa7146_buf *next) 135 { 136 struct saa7146_vv *vv = dev->vv_data; 137 138 struct saa7146_video_dma vdma3; 139 140 int count = 0; 141 unsigned long e_wait = vv->current_hps_sync == SAA7146_HPS_SYNC_PORT_A ? CMD_E_FID_A : CMD_E_FID_B; 142 unsigned long o_wait = vv->current_hps_sync == SAA7146_HPS_SYNC_PORT_A ? CMD_O_FID_A : CMD_O_FID_B; 143 144 /* 145 vdma3.base_even = 0xc8000000+2560*70; 146 vdma3.base_odd = 0xc8000000; 147 vdma3.prot_addr = 0xc8000000+2560*164; 148 vdma3.pitch = 2560; 149 vdma3.base_page = 0; 150 vdma3.num_line_byte = (64<<16)|((vbi_pixel_to_capture)<<0); // set above! 151 */ 152 vdma3.base_even = buf->pt[2].offset; 153 vdma3.base_odd = buf->pt[2].offset + 16 * vbi_pixel_to_capture; 154 vdma3.prot_addr = buf->pt[2].offset + 16 * 2 * vbi_pixel_to_capture; 155 vdma3.pitch = vbi_pixel_to_capture; 156 vdma3.base_page = buf->pt[2].dma | ME1; 157 vdma3.num_line_byte = (16 << 16) | vbi_pixel_to_capture; 158 159 saa7146_write_out_dma(dev, 3, &vdma3); 160 161 /* write beginning of rps-program */ 162 count = 0; 163 164 /* wait for o_fid_a/b / e_fid_a/b toggle only if bit 1 is not set */ 165 166 /* we don't wait here for the first field anymore. this is different from the video 167 capture and might cause that the first buffer is only half filled (with only 168 one field). but since this is some sort of streaming data, this is not that negative. 169 but by doing this, we can use the whole engine from videobuf-dma-sg.c... */ 170 171 /* 172 WRITE_RPS1(CMD_PAUSE | CMD_OAN | CMD_SIG1 | e_wait); 173 WRITE_RPS1(CMD_PAUSE | CMD_OAN | CMD_SIG1 | o_wait); 174 */ 175 /* set bit 1 */ 176 WRITE_RPS1(CMD_WR_REG | (1 << 8) | (MC2/4)); 177 WRITE_RPS1(MASK_28 | MASK_12); 178 179 /* turn on video-dma3 */ 180 WRITE_RPS1(CMD_WR_REG_MASK | (MC1/4)); 181 WRITE_RPS1(MASK_04 | MASK_20); /* => mask */ 182 WRITE_RPS1(MASK_04 | MASK_20); /* => values */ 183 184 /* wait for o_fid_a/b / e_fid_a/b toggle */ 185 WRITE_RPS1(CMD_PAUSE | o_wait); 186 WRITE_RPS1(CMD_PAUSE | e_wait); 187 188 /* generate interrupt */ 189 WRITE_RPS1(CMD_INTERRUPT); 190 191 /* stop */ 192 WRITE_RPS1(CMD_STOP); 193 194 /* enable rps1 irqs */ 195 SAA7146_IER_ENABLE(dev, MASK_28); 196 197 /* write the address of the rps-program */ 198 saa7146_write(dev, RPS_ADDR1, dev->d_rps1.dma_handle); 199 200 /* turn on rps */ 201 saa7146_write(dev, MC1, (MASK_13 | MASK_29)); 202 } 203 204 static int buffer_activate(struct saa7146_dev *dev, 205 struct saa7146_buf *buf, 206 struct saa7146_buf *next) 207 { 208 struct saa7146_vv *vv = dev->vv_data; 209 buf->vb.state = VIDEOBUF_ACTIVE; 210 211 DEB_VBI("dev:%p, buf:%p, next:%p\n", dev, buf, next); 212 saa7146_set_vbi_capture(dev,buf,next); 213 214 mod_timer(&vv->vbi_dmaq.timeout, jiffies+BUFFER_TIMEOUT); 215 return 0; 216 } 217 218 static int buffer_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,enum v4l2_field field) 219 { 220 struct file *file = q->priv_data; 221 struct saa7146_fh *fh = file->private_data; 222 struct saa7146_dev *dev = fh->dev; 223 struct saa7146_buf *buf = (struct saa7146_buf *)vb; 224 225 int err = 0; 226 int lines, llength, size; 227 228 lines = 16 * 2 ; /* 2 fields */ 229 llength = vbi_pixel_to_capture; 230 size = lines * llength; 231 232 DEB_VBI("vb:%p\n", vb); 233 234 if (0 != buf->vb.baddr && buf->vb.bsize < size) { 235 DEB_VBI("size mismatch\n"); 236 return -EINVAL; 237 } 238 239 if (buf->vb.size != size) 240 saa7146_dma_free(dev,q,buf); 241 242 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) { 243 struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb); 244 245 buf->vb.width = llength; 246 buf->vb.height = lines; 247 buf->vb.size = size; 248 buf->vb.field = field; // FIXME: check this 249 250 saa7146_pgtable_free(dev->pci, &buf->pt[2]); 251 saa7146_pgtable_alloc(dev->pci, &buf->pt[2]); 252 253 err = videobuf_iolock(q,&buf->vb, NULL); 254 if (err) 255 goto oops; 256 err = saa7146_pgtable_build_single(dev->pci, &buf->pt[2], 257 dma->sglist, dma->sglen); 258 if (0 != err) 259 return err; 260 } 261 buf->vb.state = VIDEOBUF_PREPARED; 262 buf->activate = buffer_activate; 263 264 return 0; 265 266 oops: 267 DEB_VBI("error out\n"); 268 saa7146_dma_free(dev,q,buf); 269 270 return err; 271 } 272 273 static int buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size) 274 { 275 int llength,lines; 276 277 lines = 16 * 2 ; /* 2 fields */ 278 llength = vbi_pixel_to_capture; 279 280 *size = lines * llength; 281 *count = 2; 282 283 DEB_VBI("count:%d, size:%d\n", *count, *size); 284 285 return 0; 286 } 287 288 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb) 289 { 290 struct file *file = q->priv_data; 291 struct saa7146_fh *fh = file->private_data; 292 struct saa7146_dev *dev = fh->dev; 293 struct saa7146_vv *vv = dev->vv_data; 294 struct saa7146_buf *buf = (struct saa7146_buf *)vb; 295 296 DEB_VBI("vb:%p\n", vb); 297 saa7146_buffer_queue(dev, &vv->vbi_dmaq, buf); 298 } 299 300 static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb) 301 { 302 struct file *file = q->priv_data; 303 struct saa7146_fh *fh = file->private_data; 304 struct saa7146_dev *dev = fh->dev; 305 struct saa7146_buf *buf = (struct saa7146_buf *)vb; 306 307 DEB_VBI("vb:%p\n", vb); 308 saa7146_dma_free(dev,q,buf); 309 } 310 311 static struct videobuf_queue_ops vbi_qops = { 312 .buf_setup = buffer_setup, 313 .buf_prepare = buffer_prepare, 314 .buf_queue = buffer_queue, 315 .buf_release = buffer_release, 316 }; 317 318 /* ------------------------------------------------------------------ */ 319 320 static void vbi_stop(struct saa7146_fh *fh, struct file *file) 321 { 322 struct saa7146_dev *dev = fh->dev; 323 struct saa7146_vv *vv = dev->vv_data; 324 unsigned long flags; 325 DEB_VBI("dev:%p, fh:%p\n", dev, fh); 326 327 spin_lock_irqsave(&dev->slock,flags); 328 329 /* disable rps1 */ 330 saa7146_write(dev, MC1, MASK_29); 331 332 /* disable rps1 irqs */ 333 SAA7146_IER_DISABLE(dev, MASK_28); 334 335 /* shut down dma 3 transfers */ 336 saa7146_write(dev, MC1, MASK_20); 337 338 if (vv->vbi_dmaq.curr) 339 saa7146_buffer_finish(dev, &vv->vbi_dmaq, VIDEOBUF_DONE); 340 341 videobuf_queue_cancel(&fh->vbi_q); 342 343 vv->vbi_streaming = NULL; 344 345 del_timer(&vv->vbi_dmaq.timeout); 346 del_timer(&vv->vbi_read_timeout); 347 348 spin_unlock_irqrestore(&dev->slock, flags); 349 } 350 351 static void vbi_read_timeout(unsigned long data) 352 { 353 struct file *file = (struct file*)data; 354 struct saa7146_fh *fh = file->private_data; 355 struct saa7146_dev *dev = fh->dev; 356 357 DEB_VBI("dev:%p, fh:%p\n", dev, fh); 358 359 vbi_stop(fh, file); 360 } 361 362 static void vbi_init(struct saa7146_dev *dev, struct saa7146_vv *vv) 363 { 364 DEB_VBI("dev:%p\n", dev); 365 366 INIT_LIST_HEAD(&vv->vbi_dmaq.queue); 367 368 init_timer(&vv->vbi_dmaq.timeout); 369 vv->vbi_dmaq.timeout.function = saa7146_buffer_timeout; 370 vv->vbi_dmaq.timeout.data = (unsigned long)(&vv->vbi_dmaq); 371 vv->vbi_dmaq.dev = dev; 372 373 init_waitqueue_head(&vv->vbi_wq); 374 } 375 376 static int vbi_open(struct saa7146_dev *dev, struct file *file) 377 { 378 struct saa7146_fh *fh = file->private_data; 379 struct saa7146_vv *vv = fh->dev->vv_data; 380 381 u32 arbtr_ctrl = saa7146_read(dev, PCI_BT_V1); 382 int ret = 0; 383 384 DEB_VBI("dev:%p, fh:%p\n", dev, fh); 385 386 ret = saa7146_res_get(fh, RESOURCE_DMA3_BRS); 387 if (0 == ret) { 388 DEB_S("cannot get vbi RESOURCE_DMA3_BRS resource\n"); 389 return -EBUSY; 390 } 391 392 /* adjust arbitrition control for video dma 3 */ 393 arbtr_ctrl &= ~0x1f0000; 394 arbtr_ctrl |= 0x1d0000; 395 saa7146_write(dev, PCI_BT_V1, arbtr_ctrl); 396 saa7146_write(dev, MC2, (MASK_04|MASK_20)); 397 398 videobuf_queue_sg_init(&fh->vbi_q, &vbi_qops, 399 &dev->pci->dev, &dev->slock, 400 V4L2_BUF_TYPE_VBI_CAPTURE, 401 V4L2_FIELD_SEQ_TB, // FIXME: does this really work? 402 sizeof(struct saa7146_buf), 403 file, &dev->v4l2_lock); 404 405 vv->vbi_read_timeout.function = vbi_read_timeout; 406 vv->vbi_read_timeout.data = (unsigned long)file; 407 408 /* initialize the brs */ 409 if ( 0 != (SAA7146_USE_PORT_B_FOR_VBI & dev->ext_vv_data->flags)) { 410 saa7146_write(dev, BRS_CTRL, MASK_30|MASK_29 | (7 << 19)); 411 } else { 412 saa7146_write(dev, BRS_CTRL, 0x00000001); 413 414 if (0 != (ret = vbi_workaround(dev))) { 415 DEB_VBI("vbi workaround failed!\n"); 416 /* return ret;*/ 417 } 418 } 419 420 /* upload brs register */ 421 saa7146_write(dev, MC2, (MASK_08|MASK_24)); 422 return 0; 423 } 424 425 static void vbi_close(struct saa7146_dev *dev, struct file *file) 426 { 427 struct saa7146_fh *fh = file->private_data; 428 struct saa7146_vv *vv = dev->vv_data; 429 DEB_VBI("dev:%p, fh:%p\n", dev, fh); 430 431 if( fh == vv->vbi_streaming ) { 432 vbi_stop(fh, file); 433 } 434 saa7146_res_free(fh, RESOURCE_DMA3_BRS); 435 } 436 437 static void vbi_irq_done(struct saa7146_dev *dev, unsigned long status) 438 { 439 struct saa7146_vv *vv = dev->vv_data; 440 spin_lock(&dev->slock); 441 442 if (vv->vbi_dmaq.curr) { 443 DEB_VBI("dev:%p, curr:%p\n", dev, vv->vbi_dmaq.curr); 444 /* this must be += 2, one count for each field */ 445 vv->vbi_fieldcount+=2; 446 vv->vbi_dmaq.curr->vb.field_count = vv->vbi_fieldcount; 447 saa7146_buffer_finish(dev, &vv->vbi_dmaq, VIDEOBUF_DONE); 448 } else { 449 DEB_VBI("dev:%p\n", dev); 450 } 451 saa7146_buffer_next(dev, &vv->vbi_dmaq, 1); 452 453 spin_unlock(&dev->slock); 454 } 455 456 static ssize_t vbi_read(struct file *file, char __user *data, size_t count, loff_t *ppos) 457 { 458 struct saa7146_fh *fh = file->private_data; 459 struct saa7146_dev *dev = fh->dev; 460 struct saa7146_vv *vv = dev->vv_data; 461 ssize_t ret = 0; 462 463 DEB_VBI("dev:%p, fh:%p\n", dev, fh); 464 465 if( NULL == vv->vbi_streaming ) { 466 // fixme: check if dma3 is available 467 // fixme: activate vbi engine here if necessary. (really?) 468 vv->vbi_streaming = fh; 469 } 470 471 if( fh != vv->vbi_streaming ) { 472 DEB_VBI("open %p is already using vbi capture\n", 473 vv->vbi_streaming); 474 return -EBUSY; 475 } 476 477 mod_timer(&vv->vbi_read_timeout, jiffies+BUFFER_TIMEOUT); 478 ret = videobuf_read_stream(&fh->vbi_q, data, count, ppos, 1, 479 file->f_flags & O_NONBLOCK); 480 /* 481 printk("BASE_ODD3: 0x%08x\n", saa7146_read(dev, BASE_ODD3)); 482 printk("BASE_EVEN3: 0x%08x\n", saa7146_read(dev, BASE_EVEN3)); 483 printk("PROT_ADDR3: 0x%08x\n", saa7146_read(dev, PROT_ADDR3)); 484 printk("PITCH3: 0x%08x\n", saa7146_read(dev, PITCH3)); 485 printk("BASE_PAGE3: 0x%08x\n", saa7146_read(dev, BASE_PAGE3)); 486 printk("NUM_LINE_BYTE3: 0x%08x\n", saa7146_read(dev, NUM_LINE_BYTE3)); 487 printk("BRS_CTRL: 0x%08x\n", saa7146_read(dev, BRS_CTRL)); 488 */ 489 return ret; 490 } 491 492 struct saa7146_use_ops saa7146_vbi_uops = { 493 .init = vbi_init, 494 .open = vbi_open, 495 .release = vbi_close, 496 .irq_done = vbi_irq_done, 497 .read = vbi_read, 498 }; 499