1 // SPDX-License-Identifier: GPL-2.0-or-later
4 bttv-risc.c -- interfaces to other kernel modules
6 bttv risc code handling
10 (c) 2000-2003 Gerd Knorr <kraxel@bytesex.org>
15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
17 #include <linux/module.h>
18 #include <linux/init.h>
19 #include <linux/slab.h>
20 #include <linux/pci.h>
21 #include <linux/vmalloc.h>
22 #include <linux/interrupt.h>
24 #include <asm/pgtable.h>
25 #include <media/v4l2-ioctl.h>
29 #define VCR_HACK_LINES 4
31 /* ---------------------------------------------------------- */
32 /* risc code generators */
35 bttv_risc_packed(struct bttv *btv, struct btcx_riscmem *risc,
36 struct scatterlist *sglist,
37 unsigned int offset, unsigned int bpl,
38 unsigned int padding, unsigned int skip_lines,
39 unsigned int store_lines)
41 u32 instructions,line,todo;
42 struct scatterlist *sg;
46 /* estimate risc mem: worst case is one write per page border +
47 one write per scan line + sync + jump (all 2 dwords). padding
48 can cause next bpl to start close to a page border. First DMA
49 region may be smaller than PAGE_SIZE */
50 instructions = skip_lines * 4;
51 instructions += (1 + ((bpl + padding) * store_lines)
52 / PAGE_SIZE + store_lines) * 8;
53 instructions += 2 * 8;
54 if ((rc = btcx_riscmem_alloc(btv->c.pci,risc,instructions)) < 0)
57 /* sync instruction */
59 *(rp++) = cpu_to_le32(BT848_RISC_SYNC|BT848_FIFO_STATUS_FM1);
60 *(rp++) = cpu_to_le32(0);
62 while (skip_lines-- > 0) {
63 *(rp++) = cpu_to_le32(BT848_RISC_SKIP | BT848_RISC_SOL |
64 BT848_RISC_EOL | bpl);
69 for (line = 0; line < store_lines; line++) {
70 if ((btv->opt_vcr_hack) &&
71 (line >= (store_lines - VCR_HACK_LINES)))
73 while (offset && offset >= sg_dma_len(sg)) {
74 offset -= sg_dma_len(sg);
77 if (bpl <= sg_dma_len(sg)-offset) {
78 /* fits into current chunk */
79 *(rp++)=cpu_to_le32(BT848_RISC_WRITE|BT848_RISC_SOL|
81 *(rp++)=cpu_to_le32(sg_dma_address(sg)+offset);
84 /* scanline needs to be split */
86 *(rp++)=cpu_to_le32(BT848_RISC_WRITE|BT848_RISC_SOL|
87 (sg_dma_len(sg)-offset));
88 *(rp++)=cpu_to_le32(sg_dma_address(sg)+offset);
89 todo -= (sg_dma_len(sg)-offset);
92 while (todo > sg_dma_len(sg)) {
93 *(rp++)=cpu_to_le32(BT848_RISC_WRITE|
95 *(rp++)=cpu_to_le32(sg_dma_address(sg));
96 todo -= sg_dma_len(sg);
99 *(rp++)=cpu_to_le32(BT848_RISC_WRITE|BT848_RISC_EOL|
101 *(rp++)=cpu_to_le32(sg_dma_address(sg));
107 /* save pointer to jmp instruction address */
109 BUG_ON((risc->jmp - risc->cpu + 2) * sizeof(*risc->cpu) > risc->size);
114 bttv_risc_planar(struct bttv *btv, struct btcx_riscmem *risc,
115 struct scatterlist *sglist,
116 unsigned int yoffset, unsigned int ybpl,
117 unsigned int ypadding, unsigned int ylines,
118 unsigned int uoffset, unsigned int voffset,
119 unsigned int hshift, unsigned int vshift,
120 unsigned int cpadding)
122 unsigned int instructions,line,todo,ylen,chroma;
125 struct scatterlist *ysg;
126 struct scatterlist *usg;
127 struct scatterlist *vsg;
128 int topfield = (0 == yoffset);
131 /* estimate risc mem: worst case is one write per page border +
132 one write per scan line (5 dwords)
133 plus sync + jump (2 dwords) */
134 instructions = ((3 + (ybpl + ypadding) * ylines * 2)
135 / PAGE_SIZE) + ylines;
137 if ((rc = btcx_riscmem_alloc(btv->c.pci,risc,instructions*4*5)) < 0)
140 /* sync instruction */
142 *(rp++) = cpu_to_le32(BT848_RISC_SYNC|BT848_FIFO_STATUS_FM3);
143 *(rp++) = cpu_to_le32(0);
149 for (line = 0; line < ylines; line++) {
150 if ((btv->opt_vcr_hack) &&
151 (line >= (ylines - VCR_HACK_LINES)))
159 chroma = ((line & 1) == 0);
161 chroma = ((line & 1) == 1);
165 chroma = ((line & 3) == 0);
167 chroma = ((line & 3) == 2);
174 for (todo = ybpl; todo > 0; todo -= ylen) {
175 /* go to next sg entry if needed */
176 while (yoffset && yoffset >= sg_dma_len(ysg)) {
177 yoffset -= sg_dma_len(ysg);
181 /* calculate max number of bytes we can write */
183 if (yoffset + ylen > sg_dma_len(ysg))
184 ylen = sg_dma_len(ysg) - yoffset;
186 while (uoffset && uoffset >= sg_dma_len(usg)) {
187 uoffset -= sg_dma_len(usg);
190 while (voffset && voffset >= sg_dma_len(vsg)) {
191 voffset -= sg_dma_len(vsg);
195 if (uoffset + (ylen>>hshift) > sg_dma_len(usg))
196 ylen = (sg_dma_len(usg) - uoffset) << hshift;
197 if (voffset + (ylen>>hshift) > sg_dma_len(vsg))
198 ylen = (sg_dma_len(vsg) - voffset) << hshift;
199 ri = BT848_RISC_WRITE123;
201 ri = BT848_RISC_WRITE1S23;
204 ri |= BT848_RISC_SOL;
206 ri |= BT848_RISC_EOL;
208 /* write risc instruction */
209 *(rp++)=cpu_to_le32(ri | ylen);
210 *(rp++)=cpu_to_le32(((ylen >> hshift) << 16) |
212 *(rp++)=cpu_to_le32(sg_dma_address(ysg)+yoffset);
215 *(rp++)=cpu_to_le32(sg_dma_address(usg)+uoffset);
216 uoffset += ylen >> hshift;
217 *(rp++)=cpu_to_le32(sg_dma_address(vsg)+voffset);
218 voffset += ylen >> hshift;
228 /* save pointer to jmp instruction address */
230 BUG_ON((risc->jmp - risc->cpu + 2) * sizeof(*risc->cpu) > risc->size);
235 bttv_risc_overlay(struct bttv *btv, struct btcx_riscmem *risc,
236 const struct bttv_format *fmt, struct bttv_overlay *ov,
237 int skip_even, int skip_odd)
239 int dwords, rc, line, maxy, start, end;
240 unsigned skip, nskips;
241 struct btcx_skiplist *skips;
246 /* skip list for window clipping */
247 skips = kmalloc_array(ov->nclips, sizeof(*skips),GFP_KERNEL);
251 /* estimate risc mem: worst case is (1.5*clip+1) * lines instructions
252 + sync + jump (all 2 dwords) */
253 dwords = (3 * ov->nclips + 2) *
254 ((skip_even || skip_odd) ? (ov->w.height+1)>>1 : ov->w.height);
256 if ((rc = btcx_riscmem_alloc(btv->c.pci,risc,dwords*4)) < 0) {
261 /* sync instruction */
263 *(rp++) = cpu_to_le32(BT848_RISC_SYNC|BT848_FIFO_STATUS_FM1);
264 *(rp++) = cpu_to_le32(0);
266 addr = (unsigned long)btv->fbuf.base;
267 addr += btv->fbuf.fmt.bytesperline * ov->w.top;
268 addr += (fmt->depth >> 3) * ov->w.left;
271 for (maxy = -1, line = 0; line < ov->w.height;
272 line++, addr += btv->fbuf.fmt.bytesperline) {
273 if ((btv->opt_vcr_hack) &&
274 (line >= (ov->w.height - VCR_HACK_LINES)))
276 if ((line%2) == 0 && skip_even)
278 if ((line%2) == 1 && skip_odd)
281 /* calculate clipping */
283 btcx_calc_skips(line, ov->w.width, &maxy,
284 skips, &nskips, ov->clips, ov->nclips);
286 /* write out risc code */
287 for (start = 0, skip = 0; start < ov->w.width; start = end) {
288 if (skip >= nskips) {
289 ri = BT848_RISC_WRITE;
291 } else if (start < skips[skip].start) {
292 ri = BT848_RISC_WRITE;
293 end = skips[skip].start;
295 ri = BT848_RISC_SKIP;
296 end = skips[skip].end;
299 if (BT848_RISC_WRITE == ri)
300 ra = addr + (fmt->depth>>3)*start;
305 ri |= BT848_RISC_SOL;
306 if (ov->w.width == end)
307 ri |= BT848_RISC_EOL;
308 ri |= (fmt->depth>>3) * (end-start);
310 *(rp++)=cpu_to_le32(ri);
312 *(rp++)=cpu_to_le32(ra);
316 /* save pointer to jmp instruction address */
318 BUG_ON((risc->jmp - risc->cpu + 2) * sizeof(*risc->cpu) > risc->size);
323 /* ---------------------------------------------------------- */
326 bttv_calc_geo_old(struct bttv *btv, struct bttv_geometry *geo,
327 int width, int height, int interleaved,
328 const struct bttv_tvnorm *tvnorm)
333 int swidth = tvnorm->swidth;
334 int totalwidth = tvnorm->totalwidth;
335 int scaledtwidth = tvnorm->scaledtwidth;
337 if (btv->input == btv->dig) {
343 vdelay = tvnorm->vdelay;
345 xsf = (width*scaledtwidth)/swidth;
346 geo->hscale = ((totalwidth*4096UL)/xsf-4096);
347 geo->hdelay = tvnorm->hdelayx1;
348 geo->hdelay = (geo->hdelay*width)/swidth;
349 geo->hdelay &= 0x3fe;
350 sr = ((tvnorm->sheight >> (interleaved?0:1))*512)/height - 512;
351 geo->vscale = (0x10000UL-sr) & 0x1fff;
352 geo->crop = ((width>>8)&0x03) | ((geo->hdelay>>6)&0x0c) |
353 ((tvnorm->sheight>>4)&0x30) | ((vdelay>>2)&0xc0);
354 geo->vscale |= interleaved ? (BT848_VSCALE_INT<<8) : 0;
355 geo->vdelay = vdelay;
357 geo->sheight = tvnorm->sheight;
358 geo->vtotal = tvnorm->vtotal;
360 if (btv->opt_combfilter) {
361 geo->vtc = (width < 193) ? 2 : ((width < 385) ? 1 : 0);
362 geo->comb = (width < 769) ? 1 : 0;
370 bttv_calc_geo (struct bttv * btv,
371 struct bttv_geometry * geo,
375 const struct bttv_tvnorm * tvnorm,
376 const struct v4l2_rect * crop)
378 unsigned int c_width;
379 unsigned int c_height;
382 if ((crop->left == tvnorm->cropcap.defrect.left
383 && crop->top == tvnorm->cropcap.defrect.top
384 && crop->width == tvnorm->cropcap.defrect.width
385 && crop->height == tvnorm->cropcap.defrect.height
386 && width <= tvnorm->swidth /* see PAL-Nc et al */)
387 || btv->input == btv->dig) {
388 bttv_calc_geo_old(btv, geo, width, height,
389 both_fields, tvnorm);
393 /* For bug compatibility the image size checks permit scale
394 factors > 16. See bttv_crop_calc_limits(). */
395 c_width = min((unsigned int) crop->width, width * 16);
396 c_height = min((unsigned int) crop->height, height * 16);
399 geo->hscale = (c_width * 4096U + (width >> 1)) / width - 4096;
400 /* Even to store Cb first, odd for Cr. */
401 geo->hdelay = ((crop->left * width + c_width) / c_width) & ~1;
403 geo->sheight = c_height;
404 geo->vdelay = crop->top - tvnorm->cropcap.bounds.top + MIN_VDELAY;
405 sr = c_height >> !both_fields;
406 sr = (sr * 512U + (height >> 1)) / height - 512;
407 geo->vscale = (0x10000UL - sr) & 0x1fff;
408 geo->vscale |= both_fields ? (BT848_VSCALE_INT << 8) : 0;
409 geo->vtotal = tvnorm->vtotal;
411 geo->crop = (((geo->width >> 8) & 0x03) |
412 ((geo->hdelay >> 6) & 0x0c) |
413 ((geo->sheight >> 4) & 0x30) |
414 ((geo->vdelay >> 2) & 0xc0));
416 if (btv->opt_combfilter) {
417 geo->vtc = (width < 193) ? 2 : ((width < 385) ? 1 : 0);
418 geo->comb = (width < 769) ? 1 : 0;
426 bttv_apply_geo(struct bttv *btv, struct bttv_geometry *geo, int odd)
428 int off = odd ? 0x80 : 0x00;
431 btor(BT848_VSCALE_COMB, BT848_E_VSCALE_HI+off);
433 btand(~BT848_VSCALE_COMB, BT848_E_VSCALE_HI+off);
435 btwrite(geo->vtc, BT848_E_VTC+off);
436 btwrite(geo->hscale >> 8, BT848_E_HSCALE_HI+off);
437 btwrite(geo->hscale & 0xff, BT848_E_HSCALE_LO+off);
438 btaor((geo->vscale>>8), 0xe0, BT848_E_VSCALE_HI+off);
439 btwrite(geo->vscale & 0xff, BT848_E_VSCALE_LO+off);
440 btwrite(geo->width & 0xff, BT848_E_HACTIVE_LO+off);
441 btwrite(geo->hdelay & 0xff, BT848_E_HDELAY_LO+off);
442 btwrite(geo->sheight & 0xff, BT848_E_VACTIVE_LO+off);
443 btwrite(geo->vdelay & 0xff, BT848_E_VDELAY_LO+off);
444 btwrite(geo->crop, BT848_E_CROP+off);
445 btwrite(geo->vtotal>>8, BT848_VTOTAL_HI);
446 btwrite(geo->vtotal & 0xff, BT848_VTOTAL_LO);
449 /* ---------------------------------------------------------- */
450 /* risc group / risc main loop / dma management */
453 bttv_set_dma(struct bttv *btv, int override)
459 if (NULL != btv->curr.top) btv->cap_ctl |= 0x02;
460 if (NULL != btv->curr.bottom) btv->cap_ctl |= 0x01;
461 if (NULL != btv->cvbi) btv->cap_ctl |= 0x0c;
464 capctl |= (btv->cap_ctl & 0x03) ? 0x03 : 0x00; /* capture */
465 capctl |= (btv->cap_ctl & 0x0c) ? 0x0c : 0x00; /* vbi data */
468 d2printk("%d: capctl=%x lirq=%d top=%08llx/%08llx even=%08llx/%08llx\n",
469 btv->c.nr,capctl,btv->loop_irq,
470 btv->cvbi ? (unsigned long long)btv->cvbi->top.dma : 0,
471 btv->curr.top ? (unsigned long long)btv->curr.top->top.dma : 0,
472 btv->cvbi ? (unsigned long long)btv->cvbi->bottom.dma : 0,
473 btv->curr.bottom ? (unsigned long long)btv->curr.bottom->bottom.dma : 0);
475 cmd = BT848_RISC_JUMP;
477 cmd |= BT848_RISC_IRQ;
478 cmd |= (btv->loop_irq & 0x0f) << 16;
479 cmd |= (~btv->loop_irq & 0x0f) << 20;
481 if (btv->curr.frame_irq || btv->loop_irq || btv->cvbi) {
482 mod_timer(&btv->timeout, jiffies+BTTV_TIMEOUT);
484 del_timer(&btv->timeout);
486 btv->main.cpu[RISC_SLOT_LOOP] = cpu_to_le32(cmd);
488 btaor(capctl, ~0x0f, BT848_CAP_CTL);
492 btwrite(btv->main.dma, BT848_RISC_STRT_ADD);
493 btor(3, BT848_GPIO_DMA_CTL);
498 btand(~3, BT848_GPIO_DMA_CTL);
505 bttv_risc_init_main(struct bttv *btv)
509 if ((rc = btcx_riscmem_alloc(btv->c.pci,&btv->main,PAGE_SIZE)) < 0)
511 dprintk("%d: risc main @ %08llx\n",
512 btv->c.nr, (unsigned long long)btv->main.dma);
514 btv->main.cpu[0] = cpu_to_le32(BT848_RISC_SYNC | BT848_RISC_RESYNC |
515 BT848_FIFO_STATUS_VRE);
516 btv->main.cpu[1] = cpu_to_le32(0);
517 btv->main.cpu[2] = cpu_to_le32(BT848_RISC_JUMP);
518 btv->main.cpu[3] = cpu_to_le32(btv->main.dma + (4<<2));
521 btv->main.cpu[4] = cpu_to_le32(BT848_RISC_JUMP);
522 btv->main.cpu[5] = cpu_to_le32(btv->main.dma + (6<<2));
523 btv->main.cpu[6] = cpu_to_le32(BT848_RISC_JUMP);
524 btv->main.cpu[7] = cpu_to_le32(btv->main.dma + (8<<2));
526 btv->main.cpu[8] = cpu_to_le32(BT848_RISC_SYNC | BT848_RISC_RESYNC |
527 BT848_FIFO_STATUS_VRO);
528 btv->main.cpu[9] = cpu_to_le32(0);
531 btv->main.cpu[10] = cpu_to_le32(BT848_RISC_JUMP);
532 btv->main.cpu[11] = cpu_to_le32(btv->main.dma + (12<<2));
533 btv->main.cpu[12] = cpu_to_le32(BT848_RISC_JUMP);
534 btv->main.cpu[13] = cpu_to_le32(btv->main.dma + (14<<2));
536 /* jump back to top field */
537 btv->main.cpu[14] = cpu_to_le32(BT848_RISC_JUMP);
538 btv->main.cpu[15] = cpu_to_le32(btv->main.dma + (0<<2));
544 bttv_risc_hook(struct bttv *btv, int slot, struct btcx_riscmem *risc,
548 unsigned long next = btv->main.dma + ((slot+2) << 2);
551 d2printk("%d: risc=%p slot[%d]=NULL\n", btv->c.nr, risc, slot);
552 btv->main.cpu[slot+1] = cpu_to_le32(next);
554 d2printk("%d: risc=%p slot[%d]=%08llx irq=%d\n",
555 btv->c.nr, risc, slot,
556 (unsigned long long)risc->dma, irqflags);
557 cmd = BT848_RISC_JUMP;
559 cmd |= BT848_RISC_IRQ;
560 cmd |= (irqflags & 0x0f) << 16;
561 cmd |= (~irqflags & 0x0f) << 20;
563 risc->jmp[0] = cpu_to_le32(cmd);
564 risc->jmp[1] = cpu_to_le32(next);
565 btv->main.cpu[slot+1] = cpu_to_le32(risc->dma);
571 bttv_dma_free(struct videobuf_queue *q,struct bttv *btv, struct bttv_buffer *buf)
573 struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
575 BUG_ON(in_interrupt());
576 videobuf_waiton(q, &buf->vb, 0, 0);
577 videobuf_dma_unmap(q->dev, dma);
578 videobuf_dma_free(dma);
579 btcx_riscmem_free(btv->c.pci,&buf->bottom);
580 btcx_riscmem_free(btv->c.pci,&buf->top);
581 buf->vb.state = VIDEOBUF_NEEDS_INIT;
585 bttv_buffer_activate_vbi(struct bttv *btv,
586 struct bttv_buffer *vbi)
588 struct btcx_riscmem *top;
589 struct btcx_riscmem *bottom;
591 int bottom_irq_flags;
596 bottom_irq_flags = 0;
599 unsigned int crop, vdelay;
601 vbi->vb.state = VIDEOBUF_ACTIVE;
602 list_del(&vbi->vb.queue);
604 /* VDELAY is start of video, end of VBI capturing. */
605 crop = btread(BT848_E_CROP);
606 vdelay = btread(BT848_E_VDELAY_LO) + ((crop & 0xc0) << 2);
608 if (vbi->geo.vdelay > vdelay) {
609 vdelay = vbi->geo.vdelay & 0xfe;
610 crop = (crop & 0x3f) | ((vbi->geo.vdelay >> 2) & 0xc0);
612 btwrite(vdelay, BT848_E_VDELAY_LO);
613 btwrite(crop, BT848_E_CROP);
614 btwrite(vdelay, BT848_O_VDELAY_LO);
615 btwrite(crop, BT848_O_CROP);
618 if (vbi->vbi_count[0] > 0) {
623 if (vbi->vbi_count[1] > 0) {
625 bottom = &vbi->bottom;
626 bottom_irq_flags = 4;
630 bttv_risc_hook(btv, RISC_SLOT_O_VBI, top, top_irq_flags);
631 bttv_risc_hook(btv, RISC_SLOT_E_VBI, bottom, bottom_irq_flags);
637 bttv_buffer_activate_video(struct bttv *btv,
638 struct bttv_buffer_set *set)
641 if (NULL != set->top && NULL != set->bottom) {
642 if (set->top == set->bottom) {
643 set->top->vb.state = VIDEOBUF_ACTIVE;
644 if (set->top->vb.queue.next)
645 list_del(&set->top->vb.queue);
647 set->top->vb.state = VIDEOBUF_ACTIVE;
648 set->bottom->vb.state = VIDEOBUF_ACTIVE;
649 if (set->top->vb.queue.next)
650 list_del(&set->top->vb.queue);
651 if (set->bottom->vb.queue.next)
652 list_del(&set->bottom->vb.queue);
654 bttv_apply_geo(btv, &set->top->geo, 1);
655 bttv_apply_geo(btv, &set->bottom->geo,0);
656 bttv_risc_hook(btv, RISC_SLOT_O_FIELD, &set->top->top,
658 bttv_risc_hook(btv, RISC_SLOT_E_FIELD, &set->bottom->bottom,
660 btaor((set->top->btformat & 0xf0) | (set->bottom->btformat & 0x0f),
661 ~0xff, BT848_COLOR_FMT);
662 btaor((set->top->btswap & 0x0a) | (set->bottom->btswap & 0x05),
663 ~0x0f, BT848_COLOR_CTL);
664 } else if (NULL != set->top) {
665 set->top->vb.state = VIDEOBUF_ACTIVE;
666 if (set->top->vb.queue.next)
667 list_del(&set->top->vb.queue);
668 bttv_apply_geo(btv, &set->top->geo,1);
669 bttv_apply_geo(btv, &set->top->geo,0);
670 bttv_risc_hook(btv, RISC_SLOT_O_FIELD, &set->top->top,
672 bttv_risc_hook(btv, RISC_SLOT_E_FIELD, NULL, 0);
673 btaor(set->top->btformat & 0xff, ~0xff, BT848_COLOR_FMT);
674 btaor(set->top->btswap & 0x0f, ~0x0f, BT848_COLOR_CTL);
675 } else if (NULL != set->bottom) {
676 set->bottom->vb.state = VIDEOBUF_ACTIVE;
677 if (set->bottom->vb.queue.next)
678 list_del(&set->bottom->vb.queue);
679 bttv_apply_geo(btv, &set->bottom->geo,1);
680 bttv_apply_geo(btv, &set->bottom->geo,0);
681 bttv_risc_hook(btv, RISC_SLOT_O_FIELD, NULL, 0);
682 bttv_risc_hook(btv, RISC_SLOT_E_FIELD, &set->bottom->bottom,
684 btaor(set->bottom->btformat & 0xff, ~0xff, BT848_COLOR_FMT);
685 btaor(set->bottom->btswap & 0x0f, ~0x0f, BT848_COLOR_CTL);
687 bttv_risc_hook(btv, RISC_SLOT_O_FIELD, NULL, 0);
688 bttv_risc_hook(btv, RISC_SLOT_E_FIELD, NULL, 0);
693 /* ---------------------------------------------------------- */
695 /* calculate geometry, build risc code */
697 bttv_buffer_risc(struct bttv *btv, struct bttv_buffer *buf)
699 const struct bttv_tvnorm *tvnorm = bttv_tvnorms + buf->tvnorm;
700 struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
702 dprintk("%d: buffer field: %s format: %s size: %dx%d\n",
703 btv->c.nr, v4l2_field_names[buf->vb.field],
704 buf->fmt->name, buf->vb.width, buf->vb.height);
706 /* packed pixel modes */
707 if (buf->fmt->flags & FORMAT_FLAGS_PACKED) {
708 int bpl = (buf->fmt->depth >> 3) * buf->vb.width;
709 int bpf = bpl * (buf->vb.height >> 1);
711 bttv_calc_geo(btv,&buf->geo,buf->vb.width,buf->vb.height,
712 V4L2_FIELD_HAS_BOTH(buf->vb.field),
715 switch (buf->vb.field) {
717 bttv_risc_packed(btv,&buf->top,dma->sglist,
719 /* padding */ 0,/* skip_lines */ 0,
722 case V4L2_FIELD_BOTTOM:
723 bttv_risc_packed(btv,&buf->bottom,dma->sglist,
724 0,bpl,0,0,buf->vb.height);
726 case V4L2_FIELD_INTERLACED:
727 bttv_risc_packed(btv,&buf->top,dma->sglist,
728 0,bpl,bpl,0,buf->vb.height >> 1);
729 bttv_risc_packed(btv,&buf->bottom,dma->sglist,
730 bpl,bpl,bpl,0,buf->vb.height >> 1);
732 case V4L2_FIELD_SEQ_TB:
733 bttv_risc_packed(btv,&buf->top,dma->sglist,
734 0,bpl,0,0,buf->vb.height >> 1);
735 bttv_risc_packed(btv,&buf->bottom,dma->sglist,
736 bpf,bpl,0,0,buf->vb.height >> 1);
744 if (buf->fmt->flags & FORMAT_FLAGS_PLANAR) {
745 int uoffset, voffset;
746 int ypadding, cpadding, lines;
748 /* calculate chroma offsets */
749 uoffset = buf->vb.width * buf->vb.height;
750 voffset = buf->vb.width * buf->vb.height;
751 if (buf->fmt->flags & FORMAT_FLAGS_CrCb) {
752 /* Y-Cr-Cb plane order */
753 uoffset >>= buf->fmt->hshift;
754 uoffset >>= buf->fmt->vshift;
757 /* Y-Cb-Cr plane order */
758 voffset >>= buf->fmt->hshift;
759 voffset >>= buf->fmt->vshift;
763 switch (buf->vb.field) {
765 bttv_calc_geo(btv,&buf->geo,buf->vb.width,
766 buf->vb.height,/* both_fields */ 0,
768 bttv_risc_planar(btv, &buf->top, dma->sglist,
769 0,buf->vb.width,0,buf->vb.height,
770 uoffset,voffset,buf->fmt->hshift,
773 case V4L2_FIELD_BOTTOM:
774 bttv_calc_geo(btv,&buf->geo,buf->vb.width,
777 bttv_risc_planar(btv, &buf->bottom, dma->sglist,
778 0,buf->vb.width,0,buf->vb.height,
779 uoffset,voffset,buf->fmt->hshift,
782 case V4L2_FIELD_INTERLACED:
783 bttv_calc_geo(btv,&buf->geo,buf->vb.width,
786 lines = buf->vb.height >> 1;
787 ypadding = buf->vb.width;
788 cpadding = buf->vb.width >> buf->fmt->hshift;
789 bttv_risc_planar(btv,&buf->top,
791 0,buf->vb.width,ypadding,lines,
796 bttv_risc_planar(btv,&buf->bottom,
798 ypadding,buf->vb.width,ypadding,lines,
805 case V4L2_FIELD_SEQ_TB:
806 bttv_calc_geo(btv,&buf->geo,buf->vb.width,
809 lines = buf->vb.height >> 1;
810 ypadding = buf->vb.width;
811 cpadding = buf->vb.width >> buf->fmt->hshift;
812 bttv_risc_planar(btv,&buf->top,
814 0,buf->vb.width,0,lines,
820 bttv_risc_planar(btv,&buf->bottom,
822 lines * ypadding,buf->vb.width,0,lines,
823 lines * ypadding + (uoffset >> 1),
824 lines * ypadding + (voffset >> 1),
835 if (buf->fmt->flags & FORMAT_FLAGS_RAW) {
836 /* build risc code */
837 buf->vb.field = V4L2_FIELD_SEQ_TB;
838 bttv_calc_geo(btv,&buf->geo,tvnorm->swidth,tvnorm->sheight,
839 1,tvnorm,&buf->crop);
840 bttv_risc_packed(btv, &buf->top, dma->sglist,
841 /* offset */ 0, RAW_BPL, /* padding */ 0,
842 /* skip_lines */ 0, RAW_LINES);
843 bttv_risc_packed(btv, &buf->bottom, dma->sglist,
844 buf->vb.size/2 , RAW_BPL, 0, 0, RAW_LINES);
847 /* copy format info */
848 buf->btformat = buf->fmt->btformat;
849 buf->btswap = buf->fmt->btswap;
853 /* ---------------------------------------------------------- */
855 /* calculate geometry, build risc code */
857 bttv_overlay_risc(struct bttv *btv,
858 struct bttv_overlay *ov,
859 const struct bttv_format *fmt,
860 struct bttv_buffer *buf)
862 /* check interleave, bottom+top fields */
863 dprintk("%d: overlay fields: %s format: %s size: %dx%d\n",
864 btv->c.nr, v4l2_field_names[buf->vb.field],
865 fmt->name, ov->w.width, ov->w.height);
867 /* calculate geometry */
868 bttv_calc_geo(btv,&buf->geo,ov->w.width,ov->w.height,
869 V4L2_FIELD_HAS_BOTH(ov->field),
870 &bttv_tvnorms[ov->tvnorm],&buf->crop);
872 /* build risc code */
875 bttv_risc_overlay(btv, &buf->top, fmt, ov, 0, 0);
877 case V4L2_FIELD_BOTTOM:
878 bttv_risc_overlay(btv, &buf->bottom, fmt, ov, 0, 0);
880 case V4L2_FIELD_INTERLACED:
881 bttv_risc_overlay(btv, &buf->top, fmt, ov, 0, 1);
882 bttv_risc_overlay(btv, &buf->bottom, fmt, ov, 1, 0);
888 /* copy format info */
889 buf->btformat = fmt->btformat;
890 buf->btswap = fmt->btswap;
891 buf->vb.field = ov->field;