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path: root/drivers/media/video/bttv-risc.c
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Diffstat (limited to 'drivers/media/video/bttv-risc.c')
-rw-r--r--drivers/media/video/bttv-risc.c802
1 files changed, 802 insertions, 0 deletions
diff --git a/drivers/media/video/bttv-risc.c b/drivers/media/video/bttv-risc.c
new file mode 100644
index 00000000000..bdc5ce6c43b
--- /dev/null
+++ b/drivers/media/video/bttv-risc.c
@@ -0,0 +1,802 @@
+/*
+ $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:
+ */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-11 07:24:07 +0000