/* bttv-risc.c -- interfaces to other kernel modules bttv risc code handling - memory management - generation (c) 2000-2003 Gerd Knorr <kraxel@bytesex.org> This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <linux/module.h> #include <linux/init.h> #include <linux/pci.h> #include <linux/vmalloc.h> #include <linux/interrupt.h> #include <asm/page.h> #include <asm/pgtable.h> #include "bttvp.h" #define VCR_HACK_LINES 4 /* ---------------------------------------------------------- */ /* risc code generators */ int bttv_risc_packed(struct bttv *btv, struct btcx_riscmem *risc, struct scatterlist *sglist, unsigned int offset, unsigned int bpl, unsigned int padding, unsigned int lines) { u32 instructions,line,todo; struct scatterlist *sg; u32 *rp; int rc; /* estimate risc mem: worst case is one write per page border + one write per scan line + sync + jump (all 2 dwords) */ instructions = (bpl * lines) / PAGE_SIZE + lines; instructions += 2; if ((rc = btcx_riscmem_alloc(btv->c.pci,risc,instructions*8)) < 0) return rc; /* sync instruction */ rp = risc->cpu; *(rp++) = cpu_to_le32(BT848_RISC_SYNC|BT848_FIFO_STATUS_FM1); *(rp++) = cpu_to_le32(0); /* scan lines */ sg = sglist; for (line = 0; line < lines; line++) { if ((btv->opt_vcr_hack) && (line >= (lines - VCR_HACK_LINES))) continue; while (offset && offset >= sg_dma_len(sg)) { offset -= sg_dma_len(sg); sg++; } if (bpl <= sg_dma_len(sg)-offset) { /* fits into current chunk */ *(rp++)=cpu_to_le32(BT848_RISC_WRITE|BT848_RISC_SOL| BT848_RISC_EOL|bpl); *(rp++)=cpu_to_le32(sg_dma_address(sg)+offset); offset+=bpl; } else { /* scanline needs to be splitted */ todo = bpl; *(rp++)=cpu_to_le32(BT848_RISC_WRITE|BT848_RISC_SOL| (sg_dma_len(sg)-offset)); *(rp++)=cpu_to_le32(sg_dma_address(sg)+offset); todo -= (sg_dma_len(sg)-offset); offset = 0; sg++; while (todo > sg_dma_len(sg)) { *(rp++)=cpu_to_le32(BT848_RISC_WRITE| sg_dma_len(sg)); *(rp++)=cpu_to_le32(sg_dma_address(sg)); todo -= sg_dma_len(sg); sg++; } *(rp++)=cpu_to_le32(BT848_RISC_WRITE|BT848_RISC_EOL| todo); *(rp++)=cpu_to_le32(sg_dma_address(sg)); offset += todo; } offset += padding; } /* save pointer to jmp instruction address */ risc->jmp = rp; BUG_ON((risc->jmp - risc->cpu + 2) / 4 > risc->size); return 0; } static int bttv_risc_planar(struct bttv *btv, struct btcx_riscmem *risc, struct scatterlist *sglist, unsigned int yoffset, unsigned int ybpl, unsigned int ypadding, unsigned int ylines, unsigned int uoffset, unsigned int voffset, unsigned int hshift, unsigned int vshift, unsigned int cpadding) { unsigned int instructions,line,todo,ylen,chroma; u32 *rp,ri; struct scatterlist *ysg; struct scatterlist *usg; struct scatterlist *vsg; int topfield = (0 == yoffset); int rc; /* estimate risc mem: worst case is one write per page border + one write per scan line (5 dwords) plus sync + jump (2 dwords) */ instructions = (ybpl * ylines * 2) / PAGE_SIZE + ylines; instructions += 2; if ((rc = btcx_riscmem_alloc(btv->c.pci,risc,instructions*4*5)) < 0) return rc; /* sync instruction */ rp = risc->cpu; *(rp++) = cpu_to_le32(BT848_RISC_SYNC|BT848_FIFO_STATUS_FM3); *(rp++) = cpu_to_le32(0); /* scan lines */ ysg = sglist; usg = sglist; vsg = sglist; for (line = 0; line < ylines; line++) { if ((btv->opt_vcr_hack) && (line >= (ylines - VCR_HACK_LINES))) continue; switch (vshift) { case 0: chroma = 1; break; case 1: if (topfield) chroma = ((line & 1) == 0); else chroma = ((line & 1) == 1); break; case 2: if (topfield) chroma = ((line & 3) == 0); else chroma = ((line & 3) == 2); break; default: chroma = 0; break; } for (todo = ybpl; todo > 0; todo -= ylen) { /* go to next sg entry if needed */ while (yoffset && yoffset >= sg_dma_len(ysg)) { yoffset -= sg_dma_len(ysg); ysg++; } while (uoffset && uoffset >= sg_dma_len(usg)) { uoffset -= sg_dma_len(usg); usg++; } while (voffset && voffset >= sg_dma_len(vsg)) { voffset -= sg_dma_len(vsg); vsg++; } /* calculate max number of bytes we can write */ ylen = todo; if (yoffset + ylen > sg_dma_len(ysg)) ylen = sg_dma_len(ysg) - yoffset; if (chroma) { if (uoffset + (ylen>>hshift) > sg_dma_len(usg)) ylen = (sg_dma_len(usg) - uoffset) << hshift; if (voffset + (ylen>>hshift) > sg_dma_len(vsg)) ylen = (sg_dma_len(vsg) - voffset) << hshift; ri = BT848_RISC_WRITE123; } else { ri = BT848_RISC_WRITE1S23; } if (ybpl == todo) ri |= BT848_RISC_SOL; if (ylen == todo) ri |= BT848_RISC_EOL; /* write risc instruction */ *(rp++)=cpu_to_le32(ri | ylen); *(rp++)=cpu_to_le32(((ylen >> hshift) << 16) | (ylen >> hshift)); *(rp++)=cpu_to_le32(sg_dma_address(ysg)+yoffset); yoffset += ylen; if (chroma) { *(rp++)=cpu_to_le32(sg_dma_address(usg)+uoffset); uoffset += ylen >> hshift; *(rp++)=cpu_to_le32(sg_dma_address(vsg)+voffset); voffset += ylen >> hshift; } } yoffset += ypadding; if (chroma) { uoffset += cpadding; voffset += cpadding; } } /* save pointer to jmp instruction address */ risc->jmp = rp; BUG_ON((risc->jmp - risc->cpu + 2) / 4 > risc->size); return 0; } static int bttv_risc_overlay(struct bttv *btv, struct btcx_riscmem *risc, const struct bttv_format *fmt, struct bttv_overlay *ov, int skip_even, int skip_odd) { int instructions,rc,line,maxy,start,end,skip,nskips; struct btcx_skiplist *skips; u32 *rp,ri,ra; u32 addr; /* skip list for window clipping */ if (NULL == (skips = kmalloc(sizeof(*skips) * ov->nclips,GFP_KERNEL))) return -ENOMEM; /* estimate risc mem: worst case is (clip+1) * lines instructions + sync + jump (all 2 dwords) */ instructions = (ov->nclips + 1) * ((skip_even || skip_odd) ? ov->w.height>>1 : ov->w.height); instructions += 2; if ((rc = btcx_riscmem_alloc(btv->c.pci,risc,instructions*8)) < 0) { kfree(skips); return rc; } /* sync instruction */ rp = risc->cpu; *(rp++) = cpu_to_le32(BT848_RISC_SYNC|BT848_FIFO_STATUS_FM1); *(rp++) = cpu_to_le32(0); addr = (unsigned long)btv->fbuf.base; addr += btv->fbuf.fmt.bytesperline * ov->w.top; addr += (fmt->depth >> 3) * ov->w.left; /* scan lines */ for (maxy = -1, line = 0; line < ov->w.height; line++, addr += btv->fbuf.fmt.bytesperline) { if ((btv->opt_vcr_hack) && (line >= (ov->w.height - VCR_HACK_LINES))) continue; if ((line%2) == 0 && skip_even) continue; if ((line%2) == 1 && skip_odd) continue; /* calculate clipping */ if (line > maxy) btcx_calc_skips(line, ov->w.width, &maxy, skips, &nskips, ov->clips, ov->nclips); /* write out risc code */ for (start = 0, skip = 0; start < ov->w.width; start = end) { if (skip >= nskips) { ri = BT848_RISC_WRITE; end = ov->w.width; } else if (start < skips[skip].start) { ri = BT848_RISC_WRITE; end = skips[skip].start; } else { ri = BT848_RISC_SKIP; end = skips[skip].end; skip++; } if (BT848_RISC_WRITE == ri) ra = addr + (fmt->depth>>3)*start; else ra = 0; if (0 == start) ri |= BT848_RISC_SOL; if (ov->w.width == end) ri |= BT848_RISC_EOL; ri |= (fmt->depth>>3) * (end-start); *(rp++)=cpu_to_le32(ri); if (0 != ra) *(rp++)=cpu_to_le32(ra); } } /* save pointer to jmp instruction address */ risc->jmp = rp; BUG_ON((risc->jmp - risc->cpu + 2) / 4 > risc->size); kfree(skips); return 0; } /* ---------------------------------------------------------- */ static void bttv_calc_geo(struct bttv *btv, struct bttv_geometry *geo, int width, int height, int interleaved, int norm) { const struct bttv_tvnorm *tvnorm = &bttv_tvnorms[norm]; u32 xsf, sr; int vdelay; int swidth = tvnorm->swidth; int totalwidth = tvnorm->totalwidth; int scaledtwidth = tvnorm->scaledtwidth; if (bttv_tvcards[btv->c.type].muxsel[btv->input] < 0) { swidth = 720; totalwidth = 858; scaledtwidth = 858; } vdelay = tvnorm->vdelay; xsf = (width*scaledtwidth)/swidth; geo->hscale = ((totalwidth*4096UL)/xsf-4096); geo->hdelay = tvnorm->hdelayx1; geo->hdelay = (geo->hdelay*width)/swidth; geo->hdelay &= 0x3fe; sr = ((tvnorm->sheight >> (interleaved?0:1))*512)/height - 512; geo->vscale = (0x10000UL-sr) & 0x1fff; geo->crop = ((width>>8)&0x03) | ((geo->hdelay>>6)&0x0c) | ((tvnorm->sheight>>4)&0x30) | ((vdelay>>2)&0xc0); geo->vscale |= interleaved ? (BT848_VSCALE_INT<<8) : 0; geo->vdelay = vdelay; geo->width = width; geo->sheight = tvnorm->sheight; geo->vtotal = tvnorm->vtotal; if (btv->opt_combfilter) { geo->vtc = (width < 193) ? 2 : ((width < 385) ? 1 : 0); geo->comb = (width < 769) ? 1 : 0; } else { geo->vtc = 0; geo->comb = 0; } } static void bttv_apply_geo(struct bttv *btv, struct bttv_geometry *geo, int odd) { int off = odd ? 0x80 : 0x00; if (geo->comb) btor(BT848_VSCALE_COMB, BT848_E_VSCALE_HI+off); else btand(~BT848_VSCALE_COMB, BT848_E_VSCALE_HI+off); btwrite(geo->vtc, BT848_E_VTC+off); btwrite(geo->hscale >> 8, BT848_E_HSCALE_HI+off); btwrite(geo->hscale & 0xff, BT848_E_HSCALE_LO+off); btaor((geo->vscale>>8), 0xe0, BT848_E_VSCALE_HI+off); btwrite(geo->vscale & 0xff, BT848_E_VSCALE_LO+off); btwrite(geo->width & 0xff, BT848_E_HACTIVE_LO+off); btwrite(geo->hdelay & 0xff, BT848_E_HDELAY_LO+off); btwrite(geo->sheight & 0xff, BT848_E_VACTIVE_LO+off); btwrite(geo->vdelay & 0xff, BT848_E_VDELAY_LO+off); btwrite(geo->crop, BT848_E_CROP+off); btwrite(geo->vtotal>>8, BT848_VTOTAL_HI); btwrite(geo->vtotal & 0xff, BT848_VTOTAL_LO); } /* ---------------------------------------------------------- */ /* risc group / risc main loop / dma management */ void bttv_set_dma(struct bttv *btv, int override) { unsigned long cmd; int capctl; btv->cap_ctl = 0; if (NULL != btv->curr.top) btv->cap_ctl |= 0x02; if (NULL != btv->curr.bottom) btv->cap_ctl |= 0x01; if (NULL != btv->cvbi) btv->cap_ctl |= 0x0c; capctl = 0; capctl |= (btv->cap_ctl & 0x03) ? 0x03 : 0x00; /* capture */ capctl |= (btv->cap_ctl & 0x0c) ? 0x0c : 0x00; /* vbi data */ capctl |= override; d2printk(KERN_DEBUG "bttv%d: capctl=%x lirq=%d top=%08Lx/%08Lx even=%08Lx/%08Lx\n", btv->c.nr,capctl,btv->loop_irq, btv->cvbi ? (unsigned long long)btv->cvbi->top.dma : 0, btv->curr.top ? (unsigned long long)btv->curr.top->top.dma : 0, btv->cvbi ? (unsigned long long)btv->cvbi->bottom.dma : 0, btv->curr.bottom ? (unsigned long long)btv->curr.bottom->bottom.dma : 0); cmd = BT848_RISC_JUMP; if (btv->loop_irq) { cmd |= BT848_RISC_IRQ; cmd |= (btv->loop_irq & 0x0f) << 16; cmd |= (~btv->loop_irq & 0x0f) << 20; } if (btv->curr.frame_irq || btv->loop_irq || btv->cvbi) { mod_timer(&btv->timeout, jiffies+BTTV_TIMEOUT); } else { del_timer(&btv->timeout); } btv->main.cpu[RISC_SLOT_LOOP] = cpu_to_le32(cmd); btaor(capctl, ~0x0f, BT848_CAP_CTL); if (capctl) { if (btv->dma_on) return; btwrite(btv->main.dma, BT848_RISC_STRT_ADD); btor(3, BT848_GPIO_DMA_CTL); btv->dma_on = 1; } else { if (!btv->dma_on) return; btand(~3, BT848_GPIO_DMA_CTL); btv->dma_on = 0; } return; } int bttv_risc_init_main(struct bttv *btv) { int rc; if ((rc = btcx_riscmem_alloc(btv->c.pci,&btv->main,PAGE_SIZE)) < 0) return rc; dprintk(KERN_DEBUG "bttv%d: risc main @ %08Lx\n", btv->c.nr,(unsigned long long)btv->main.dma); btv->main.cpu[0] = cpu_to_le32(BT848_RISC_SYNC | BT848_RISC_RESYNC | BT848_FIFO_STATUS_VRE); btv->main.cpu[1] = cpu_to_le32(0); btv->main.cpu[2] = cpu_to_le32(BT848_RISC_JUMP); btv->main.cpu[3] = cpu_to_le32(btv->main.dma + (4<<2)); /* top field */ btv->main.cpu[4] = cpu_to_le32(BT848_RISC_JUMP); btv->main.cpu[5] = cpu_to_le32(btv->main.dma + (6<<2)); btv->main.cpu[6] = cpu_to_le32(BT848_RISC_JUMP); btv->main.cpu[7] = cpu_to_le32(btv->main.dma + (8<<2)); btv->main.cpu[8] = cpu_to_le32(BT848_RISC_SYNC | BT848_RISC_RESYNC | BT848_FIFO_STATUS_VRO); btv->main.cpu[9] = cpu_to_le32(0); /* bottom field */ btv->main.cpu[10] = cpu_to_le32(BT848_RISC_JUMP); btv->main.cpu[11] = cpu_to_le32(btv->main.dma + (12<<2)); btv->main.cpu[12] = cpu_to_le32(BT848_RISC_JUMP); btv->main.cpu[13] = cpu_to_le32(btv->main.dma + (14<<2)); /* jump back to top field */ btv->main.cpu[14] = cpu_to_le32(BT848_RISC_JUMP); btv->main.cpu[15] = cpu_to_le32(btv->main.dma + (0<<2)); return 0; } int bttv_risc_hook(struct bttv *btv, int slot, struct btcx_riscmem *risc, int irqflags) { unsigned long cmd; unsigned long next = btv->main.dma + ((slot+2) << 2); if (NULL == risc) { d2printk(KERN_DEBUG "bttv%d: risc=%p slot[%d]=NULL\n", btv->c.nr,risc,slot); btv->main.cpu[slot+1] = cpu_to_le32(next); } else { d2printk(KERN_DEBUG "bttv%d: risc=%p slot[%d]=%08Lx irq=%d\n", btv->c.nr,risc,slot,(unsigned long long)risc->dma,irqflags); cmd = BT848_RISC_JUMP; if (irqflags) { cmd |= BT848_RISC_IRQ; cmd |= (irqflags & 0x0f) << 16; cmd |= (~irqflags & 0x0f) << 20; } risc->jmp[0] = cpu_to_le32(cmd); risc->jmp[1] = cpu_to_le32(next); btv->main.cpu[slot+1] = cpu_to_le32(risc->dma); } return 0; } void bttv_dma_free(struct bttv *btv, struct bttv_buffer *buf) { if (in_interrupt()) BUG(); videobuf_waiton(&buf->vb,0,0); videobuf_dma_pci_unmap(btv->c.pci, &buf->vb.dma); videobuf_dma_free(&buf->vb.dma); btcx_riscmem_free(btv->c.pci,&buf->bottom); btcx_riscmem_free(btv->c.pci,&buf->top); buf->vb.state = STATE_NEEDS_INIT; } int bttv_buffer_activate_vbi(struct bttv *btv, struct bttv_buffer *vbi) { /* vbi capture */ if (vbi) { vbi->vb.state = STATE_ACTIVE; list_del(&vbi->vb.queue); bttv_risc_hook(btv, RISC_SLOT_O_VBI, &vbi->top, 0); bttv_risc_hook(btv, RISC_SLOT_E_VBI, &vbi->bottom, 4); } else { bttv_risc_hook(btv, RISC_SLOT_O_VBI, NULL, 0); bttv_risc_hook(btv, RISC_SLOT_E_VBI, NULL, 0); } return 0; } int bttv_buffer_activate_video(struct bttv *btv, struct bttv_buffer_set *set) { /* video capture */ if (NULL != set->top && NULL != set->bottom) { if (set->top == set->bottom) { set->top->vb.state = STATE_ACTIVE; if (set->top->vb.queue.next) list_del(&set->top->vb.queue); } else { set->top->vb.state = STATE_ACTIVE; set->bottom->vb.state = STATE_ACTIVE; if (set->top->vb.queue.next) list_del(&set->top->vb.queue); if (set->bottom->vb.queue.next) list_del(&set->bottom->vb.queue); } bttv_apply_geo(btv, &set->top->geo, 1); bttv_apply_geo(btv, &set->bottom->geo,0); bttv_risc_hook(btv, RISC_SLOT_O_FIELD, &set->top->top, set->top_irq); bttv_risc_hook(btv, RISC_SLOT_E_FIELD, &set->bottom->bottom, set->frame_irq); btaor((set->top->btformat & 0xf0) | (set->bottom->btformat & 0x0f), ~0xff, BT848_COLOR_FMT); btaor((set->top->btswap & 0x0a) | (set->bottom->btswap & 0x05), ~0x0f, BT848_COLOR_CTL); } else if (NULL != set->top) { set->top->vb.state = STATE_ACTIVE; if (set->top->vb.queue.next) list_del(&set->top->vb.queue); bttv_apply_geo(btv, &set->top->geo,1); bttv_apply_geo(btv, &set->top->geo,0); bttv_risc_hook(btv, RISC_SLOT_O_FIELD, &set->top->top, set->frame_irq); bttv_risc_hook(btv, RISC_SLOT_E_FIELD, NULL, 0); btaor(set->top->btformat & 0xff, ~0xff, BT848_COLOR_FMT); btaor(set->top->btswap & 0x0f, ~0x0f, BT848_COLOR_CTL); } else if (NULL != set->bottom) { set->bottom->vb.state = STATE_ACTIVE; if (set->bottom->vb.queue.next) list_del(&set->bottom->vb.queue); bttv_apply_geo(btv, &set->bottom->geo,1); bttv_apply_geo(btv, &set->bottom->geo,0); bttv_risc_hook(btv, RISC_SLOT_O_FIELD, NULL, 0); bttv_risc_hook(btv, RISC_SLOT_E_FIELD, &set->bottom->bottom, set->frame_irq); btaor(set->bottom->btformat & 0xff, ~0xff, BT848_COLOR_FMT); btaor(set->bottom->btswap & 0x0f, ~0x0f, BT848_COLOR_CTL); } else { bttv_risc_hook(btv, RISC_SLOT_O_FIELD, NULL, 0); bttv_risc_hook(btv, RISC_SLOT_E_FIELD, NULL, 0); } return 0; } /* ---------------------------------------------------------- */ /* calculate geometry, build risc code */ int bttv_buffer_risc(struct bttv *btv, struct bttv_buffer *buf) { const struct bttv_tvnorm *tvnorm = bttv_tvnorms + buf->tvnorm; dprintk(KERN_DEBUG "bttv%d: buffer field: %s format: %s size: %dx%d\n", btv->c.nr, v4l2_field_names[buf->vb.field], buf->fmt->name, buf->vb.width, buf->vb.height); /* packed pixel modes */ if (buf->fmt->flags & FORMAT_FLAGS_PACKED) { int bpl = (buf->fmt->depth >> 3) * buf->vb.width; int bpf = bpl * (buf->vb.height >> 1); bttv_calc_geo(btv,&buf->geo,buf->vb.width,buf->vb.height, V4L2_FIELD_HAS_BOTH(buf->vb.field),buf->tvnorm); switch (buf->vb.field) { case V4L2_FIELD_TOP: bttv_risc_packed(btv,&buf->top,buf->vb.dma.sglist, 0,bpl,0,buf->vb.height); break; case V4L2_FIELD_BOTTOM: bttv_risc_packed(btv,&buf->bottom,buf->vb.dma.sglist, 0,bpl,0,buf->vb.height); break; case V4L2_FIELD_INTERLACED: bttv_risc_packed(btv,&buf->top,buf->vb.dma.sglist, 0,bpl,bpl,buf->vb.height >> 1); bttv_risc_packed(btv,&buf->bottom,buf->vb.dma.sglist, bpl,bpl,bpl,buf->vb.height >> 1); break; case V4L2_FIELD_SEQ_TB: bttv_risc_packed(btv,&buf->top,buf->vb.dma.sglist, 0,bpl,0,buf->vb.height >> 1); bttv_risc_packed(btv,&buf->bottom,buf->vb.dma.sglist, bpf,bpl,0,buf->vb.height >> 1); break; default: BUG(); } } /* planar modes */ if (buf->fmt->flags & FORMAT_FLAGS_PLANAR) { int uoffset, voffset; int ypadding, cpadding, lines; /* calculate chroma offsets */ uoffset = buf->vb.width * buf->vb.height; voffset = buf->vb.width * buf->vb.height; if (buf->fmt->flags & FORMAT_FLAGS_CrCb) { /* Y-Cr-Cb plane order */ uoffset >>= buf->fmt->hshift; uoffset >>= buf->fmt->vshift; uoffset += voffset; } else { /* Y-Cb-Cr plane order */ voffset >>= buf->fmt->hshift; voffset >>= buf->fmt->vshift; voffset += uoffset; } switch (buf->vb.field) { case V4L2_FIELD_TOP: bttv_calc_geo(btv,&buf->geo,buf->vb.width, buf->vb.height,0,buf->tvnorm); bttv_risc_planar(btv, &buf->top, buf->vb.dma.sglist, 0,buf->vb.width,0,buf->vb.height, uoffset,voffset,buf->fmt->hshift, buf->fmt->vshift,0); break; case V4L2_FIELD_BOTTOM: bttv_calc_geo(btv,&buf->geo,buf->vb.width, buf->vb.height,0,buf->tvnorm); bttv_risc_planar(btv, &buf->bottom, buf->vb.dma.sglist, 0,buf->vb.width,0,buf->vb.height, uoffset,voffset,buf->fmt->hshift, buf->fmt->vshift,0); break; case V4L2_FIELD_INTERLACED: bttv_calc_geo(btv,&buf->geo,buf->vb.width, buf->vb.height,1,buf->tvnorm); lines = buf->vb.height >> 1; ypadding = buf->vb.width; cpadding = buf->vb.width >> buf->fmt->hshift; bttv_risc_planar(btv,&buf->top, buf->vb.dma.sglist, 0,buf->vb.width,ypadding,lines, uoffset,voffset, buf->fmt->hshift, buf->fmt->vshift, cpadding); bttv_risc_planar(btv,&buf->bottom, buf->vb.dma.sglist, ypadding,buf->vb.width,ypadding,lines, uoffset+cpadding, voffset+cpadding, buf->fmt->hshift, buf->fmt->vshift, cpadding); break; case V4L2_FIELD_SEQ_TB: bttv_calc_geo(btv,&buf->geo,buf->vb.width, buf->vb.height,1,buf->tvnorm); lines = buf->vb.height >> 1; ypadding = buf->vb.width; cpadding = buf->vb.width >> buf->fmt->hshift; bttv_risc_planar(btv,&buf->top, buf->vb.dma.sglist, 0,buf->vb.width,0,lines, uoffset >> 1, voffset >> 1, buf->fmt->hshift, buf->fmt->vshift, 0); bttv_risc_planar(btv,&buf->bottom, buf->vb.dma.sglist, lines * ypadding,buf->vb.width,0,lines, lines * ypadding + (uoffset >> 1), lines * ypadding + (voffset >> 1), buf->fmt->hshift, buf->fmt->vshift, 0); break; default: BUG(); } } /* raw data */ if (buf->fmt->flags & FORMAT_FLAGS_RAW) { /* build risc code */ buf->vb.field = V4L2_FIELD_SEQ_TB; bttv_calc_geo(btv,&buf->geo,tvnorm->swidth,tvnorm->sheight, 1,buf->tvnorm); bttv_risc_packed(btv, &buf->top, buf->vb.dma.sglist, 0, RAW_BPL, 0, RAW_LINES); bttv_risc_packed(btv, &buf->bottom, buf->vb.dma.sglist, buf->vb.size/2 , RAW_BPL, 0, RAW_LINES); } /* copy format info */ buf->btformat = buf->fmt->btformat; buf->btswap = buf->fmt->btswap; return 0; } /* ---------------------------------------------------------- */ /* calculate geometry, build risc code */ int bttv_overlay_risc(struct bttv *btv, struct bttv_overlay *ov, const struct bttv_format *fmt, struct bttv_buffer *buf) { /* check interleave, bottom+top fields */ dprintk(KERN_DEBUG "bttv%d: overlay fields: %s format: %s size: %dx%d\n", btv->c.nr, v4l2_field_names[buf->vb.field], fmt->name,ov->w.width,ov->w.height); /* calculate geometry */ bttv_calc_geo(btv,&buf->geo,ov->w.width,ov->w.height, V4L2_FIELD_HAS_BOTH(ov->field), ov->tvnorm); /* build risc code */ switch (ov->field) { case V4L2_FIELD_TOP: bttv_risc_overlay(btv, &buf->top, fmt, ov, 0, 0); break; case V4L2_FIELD_BOTTOM: bttv_risc_overlay(btv, &buf->bottom, fmt, ov, 0, 0); break; case V4L2_FIELD_INTERLACED: bttv_risc_overlay(btv, &buf->top, fmt, ov, 0, 1); bttv_risc_overlay(btv, &buf->bottom, fmt, ov, 1, 0); break; default: BUG(); } /* copy format info */ buf->btformat = fmt->btformat; buf->btswap = fmt->btswap; buf->vb.field = ov->field; return 0; } /* * Local variables: * c-basic-offset: 8 * End: */