V4L/DVB (3539): Move bttv fragments to bt8xx/

Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 795 insertions, 0 deletions

diff --git a/drivers/media/video/bt8xx/bttv-risc.c b/drivers/media/video/bt8xx/bttv-risc.c
new file mode 100644
index 000000000000..16323a5d68ac
--- /dev/null
+++ b/drivers/media/video/bt8xx/bttv-risc.c
@@ -0,0 +1,795 @@
+/*
+
+    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).  padding
+           can cause next bpl to start close to a page border.  First DMA
+           region may be smaller than PAGE_SIZE */
+        instructions  = 1 + ((bpl + padding) * 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) * sizeof(*risc->cpu) > 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) * sizeof(*risc->cpu) > 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);
+                else
+                        nskips = 0;
+
+                /* 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) * sizeof(*risc->cpu) > 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 videobuf_queue *q,struct bttv *btv, struct bttv_buffer *buf)
+{
+        BUG_ON(in_interrupt());
+        videobuf_waiton(&buf->vb,0,0);
+        videobuf_dma_unmap(q, &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:
+ */