summaryrefslogtreecommitdiffstats
path: root/drivers/media/pci/bt8xx/bttv-risc.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/media/pci/bt8xx/bttv-risc.c')
-rw-r--r--drivers/media/pci/bt8xx/bttv-risc.c892
1 files changed, 892 insertions, 0 deletions
diff --git a/drivers/media/pci/bt8xx/bttv-risc.c b/drivers/media/pci/bt8xx/bttv-risc.c
new file mode 100644
index 000000000..32fa4a7fe
--- /dev/null
+++ b/drivers/media/pci/bt8xx/bttv-risc.c
@@ -0,0 +1,892 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+
+ bttv-risc.c -- interfaces to other kernel modules
+
+ bttv risc code handling
+ - memory management
+ - generation
+
+ (c) 2000-2003 Gerd Knorr <kraxel@bytesex.org>
+
+
+*/
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/vmalloc.h>
+#include <linux/interrupt.h>
+#include <linux/pgtable.h>
+#include <asm/page.h>
+#include <media/v4l2-ioctl.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 skip_lines,
+ unsigned int store_lines)
+{
+ u32 instructions,line,todo;
+ struct scatterlist *sg;
+ __le32 *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 = skip_lines * 4;
+ instructions += (1 + ((bpl + padding) * store_lines)
+ / PAGE_SIZE + store_lines) * 8;
+ instructions += 2 * 8;
+ if ((rc = btcx_riscmem_alloc(btv->c.pci,risc,instructions)) < 0)
+ return rc;
+
+ /* sync instruction */
+ rp = risc->cpu;
+ *(rp++) = cpu_to_le32(BT848_RISC_SYNC|BT848_FIFO_STATUS_FM1);
+ *(rp++) = cpu_to_le32(0);
+
+ while (skip_lines-- > 0) {
+ *(rp++) = cpu_to_le32(BT848_RISC_SKIP | BT848_RISC_SOL |
+ BT848_RISC_EOL | bpl);
+ }
+
+ /* scan lines */
+ sg = sglist;
+ for (line = 0; line < store_lines; line++) {
+ if ((btv->opt_vcr_hack) &&
+ (line >= (store_lines - VCR_HACK_LINES)))
+ continue;
+ while (offset && offset >= sg_dma_len(sg)) {
+ offset -= sg_dma_len(sg);
+ sg = sg_next(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 split */
+ 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 = sg_next(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 = sg_next(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;
+ __le32 *rp;
+ u32 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 = ((3 + (ybpl + ypadding) * 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 = sg_next(ysg);
+ }
+
+ /* 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) {
+ while (uoffset && uoffset >= sg_dma_len(usg)) {
+ uoffset -= sg_dma_len(usg);
+ usg = sg_next(usg);
+ }
+ while (voffset && voffset >= sg_dma_len(vsg)) {
+ voffset -= sg_dma_len(vsg);
+ vsg = sg_next(vsg);
+ }
+
+ 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 dwords, rc, line, maxy, start, end;
+ unsigned skip, nskips;
+ struct btcx_skiplist *skips;
+ __le32 *rp;
+ u32 ri,ra;
+ u32 addr;
+
+ /* skip list for window clipping */
+ skips = kmalloc_array(ov->nclips, sizeof(*skips),GFP_KERNEL);
+ if (NULL == skips)
+ return -ENOMEM;
+
+ /* estimate risc mem: worst case is (1.5*clip+1) * lines instructions
+ + sync + jump (all 2 dwords) */
+ dwords = (3 * ov->nclips + 2) *
+ ((skip_even || skip_odd) ? (ov->w.height+1)>>1 : ov->w.height);
+ dwords += 4;
+ if ((rc = btcx_riscmem_alloc(btv->c.pci,risc,dwords*4)) < 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) * sizeof(*risc->cpu) > risc->size);
+ kfree(skips);
+ return 0;
+}
+
+/* ---------------------------------------------------------- */
+
+static void
+bttv_calc_geo_old(struct bttv *btv, struct bttv_geometry *geo,
+ int width, int height, int interleaved,
+ const struct bttv_tvnorm *tvnorm)
+{
+ u32 xsf, sr;
+ int vdelay;
+
+ int swidth = tvnorm->swidth;
+ int totalwidth = tvnorm->totalwidth;
+ int scaledtwidth = tvnorm->scaledtwidth;
+
+ if (btv->input == btv->dig) {
+ 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_calc_geo (struct bttv * btv,
+ struct bttv_geometry * geo,
+ unsigned int width,
+ unsigned int height,
+ int both_fields,
+ const struct bttv_tvnorm * tvnorm,
+ const struct v4l2_rect * crop)
+{
+ unsigned int c_width;
+ unsigned int c_height;
+ u32 sr;
+
+ if ((crop->left == tvnorm->cropcap.defrect.left
+ && crop->top == tvnorm->cropcap.defrect.top
+ && crop->width == tvnorm->cropcap.defrect.width
+ && crop->height == tvnorm->cropcap.defrect.height
+ && width <= tvnorm->swidth /* see PAL-Nc et al */)
+ || btv->input == btv->dig) {
+ bttv_calc_geo_old(btv, geo, width, height,
+ both_fields, tvnorm);
+ return;
+ }
+
+ /* For bug compatibility the image size checks permit scale
+ factors > 16. See bttv_crop_calc_limits(). */
+ c_width = min((unsigned int) crop->width, width * 16);
+ c_height = min((unsigned int) crop->height, height * 16);
+
+ geo->width = width;
+ geo->hscale = (c_width * 4096U + (width >> 1)) / width - 4096;
+ /* Even to store Cb first, odd for Cr. */
+ geo->hdelay = ((crop->left * width + c_width) / c_width) & ~1;
+
+ geo->sheight = c_height;
+ geo->vdelay = crop->top - tvnorm->cropcap.bounds.top + MIN_VDELAY;
+ sr = c_height >> !both_fields;
+ sr = (sr * 512U + (height >> 1)) / height - 512;
+ geo->vscale = (0x10000UL - sr) & 0x1fff;
+ geo->vscale |= both_fields ? (BT848_VSCALE_INT << 8) : 0;
+ geo->vtotal = tvnorm->vtotal;
+
+ geo->crop = (((geo->width >> 8) & 0x03) |
+ ((geo->hdelay >> 6) & 0x0c) |
+ ((geo->sheight >> 4) & 0x30) |
+ ((geo->vdelay >> 2) & 0xc0));
+
+ 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("%d: capctl=%x lirq=%d top=%08llx/%08llx even=%08llx/%08llx\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("%d: risc main @ %08llx\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("%d: risc=%p slot[%d]=NULL\n", btv->c.nr, risc, slot);
+ btv->main.cpu[slot+1] = cpu_to_le32(next);
+ } else {
+ d2printk("%d: risc=%p slot[%d]=%08llx 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)
+{
+ struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
+
+ videobuf_waiton(q, &buf->vb, 0, 0);
+ videobuf_dma_unmap(q->dev, dma);
+ videobuf_dma_free(dma);
+ btcx_riscmem_free(btv->c.pci,&buf->bottom);
+ btcx_riscmem_free(btv->c.pci,&buf->top);
+ buf->vb.state = VIDEOBUF_NEEDS_INIT;
+}
+
+int
+bttv_buffer_activate_vbi(struct bttv *btv,
+ struct bttv_buffer *vbi)
+{
+ struct btcx_riscmem *top;
+ struct btcx_riscmem *bottom;
+ int top_irq_flags;
+ int bottom_irq_flags;
+
+ top = NULL;
+ bottom = NULL;
+ top_irq_flags = 0;
+ bottom_irq_flags = 0;
+
+ if (vbi) {
+ unsigned int crop, vdelay;
+
+ vbi->vb.state = VIDEOBUF_ACTIVE;
+ list_del(&vbi->vb.queue);
+
+ /* VDELAY is start of video, end of VBI capturing. */
+ crop = btread(BT848_E_CROP);
+ vdelay = btread(BT848_E_VDELAY_LO) + ((crop & 0xc0) << 2);
+
+ if (vbi->geo.vdelay > vdelay) {
+ vdelay = vbi->geo.vdelay & 0xfe;
+ crop = (crop & 0x3f) | ((vbi->geo.vdelay >> 2) & 0xc0);
+
+ btwrite(vdelay, BT848_E_VDELAY_LO);
+ btwrite(crop, BT848_E_CROP);
+ btwrite(vdelay, BT848_O_VDELAY_LO);
+ btwrite(crop, BT848_O_CROP);
+ }
+
+ if (vbi->vbi_count[0] > 0) {
+ top = &vbi->top;
+ top_irq_flags = 4;
+ }
+
+ if (vbi->vbi_count[1] > 0) {
+ top_irq_flags = 0;
+ bottom = &vbi->bottom;
+ bottom_irq_flags = 4;
+ }
+ }
+
+ bttv_risc_hook(btv, RISC_SLOT_O_VBI, top, top_irq_flags);
+ bttv_risc_hook(btv, RISC_SLOT_E_VBI, bottom, bottom_irq_flags);
+
+ 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 = VIDEOBUF_ACTIVE;
+ if (set->top->vb.queue.next)
+ list_del(&set->top->vb.queue);
+ } else {
+ set->top->vb.state = VIDEOBUF_ACTIVE;
+ set->bottom->vb.state = VIDEOBUF_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 = VIDEOBUF_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 = VIDEOBUF_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;
+ struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
+
+ dprintk("%d: buffer field: %s format: 0x%08x size: %dx%d\n",
+ btv->c.nr, v4l2_field_names[buf->vb.field],
+ buf->fmt->fourcc, 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),
+ tvnorm,&buf->crop);
+
+ switch (buf->vb.field) {
+ case V4L2_FIELD_TOP:
+ bttv_risc_packed(btv,&buf->top,dma->sglist,
+ /* offset */ 0,bpl,
+ /* padding */ 0,/* skip_lines */ 0,
+ buf->vb.height);
+ break;
+ case V4L2_FIELD_BOTTOM:
+ bttv_risc_packed(btv,&buf->bottom,dma->sglist,
+ 0,bpl,0,0,buf->vb.height);
+ break;
+ case V4L2_FIELD_INTERLACED:
+ bttv_risc_packed(btv,&buf->top,dma->sglist,
+ 0,bpl,bpl,0,buf->vb.height >> 1);
+ bttv_risc_packed(btv,&buf->bottom,dma->sglist,
+ bpl,bpl,bpl,0,buf->vb.height >> 1);
+ break;
+ case V4L2_FIELD_SEQ_TB:
+ bttv_risc_packed(btv,&buf->top,dma->sglist,
+ 0,bpl,0,0,buf->vb.height >> 1);
+ bttv_risc_packed(btv,&buf->bottom,dma->sglist,
+ bpf,bpl,0,0,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,/* both_fields */ 0,
+ tvnorm,&buf->crop);
+ bttv_risc_planar(btv, &buf->top, 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,
+ tvnorm,&buf->crop);
+ bttv_risc_planar(btv, &buf->bottom, 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,
+ tvnorm,&buf->crop);
+ lines = buf->vb.height >> 1;
+ ypadding = buf->vb.width;
+ cpadding = buf->vb.width >> buf->fmt->hshift;
+ bttv_risc_planar(btv,&buf->top,
+ dma->sglist,
+ 0,buf->vb.width,ypadding,lines,
+ uoffset,voffset,
+ buf->fmt->hshift,
+ buf->fmt->vshift,
+ cpadding);
+ bttv_risc_planar(btv,&buf->bottom,
+ 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,
+ tvnorm,&buf->crop);
+ lines = buf->vb.height >> 1;
+ ypadding = buf->vb.width;
+ cpadding = buf->vb.width >> buf->fmt->hshift;
+ bttv_risc_planar(btv,&buf->top,
+ 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,
+ 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,tvnorm,&buf->crop);
+ bttv_risc_packed(btv, &buf->top, dma->sglist,
+ /* offset */ 0, RAW_BPL, /* padding */ 0,
+ /* skip_lines */ 0, RAW_LINES);
+ bttv_risc_packed(btv, &buf->bottom, dma->sglist,
+ buf->vb.size/2 , RAW_BPL, 0, 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("%d: overlay fields: %s format: 0x%08x size: %dx%d\n",
+ btv->c.nr, v4l2_field_names[buf->vb.field],
+ fmt->fourcc, 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),
+ &bttv_tvnorms[ov->tvnorm],&buf->crop);
+
+ /* 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;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 09:05:28 +0000