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kernel-ark/drivers/media/video/bttv-risc.c
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2 
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

803 lines
23 KiB
C
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/*
$Id: bttv-risc.c,v 1.10 2004/11/19 18:07:12 kraxel Exp $
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;
#if 0 /* FIXME */
if (vdelay < btv->vbi.lines*2)
vdelay = btv->vbi.lines*2;
#endif
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:
#if 0
bttv_risc_overlay(btv, &buf->top, fmt, ov, 1, 0);
bttv_risc_overlay(btv, &buf->bottom, fmt, ov, 0, 1);
#else
bttv_risc_overlay(btv, &buf->top, fmt, ov, 0, 1);
bttv_risc_overlay(btv, &buf->bottom, fmt, ov, 1, 0);
#endif
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:
*/
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