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path: root/drivers/media/pci/bt8xx/bttv-risc.c
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Diffstat (limited to 'drivers/media/pci/bt8xx/bttv-risc.c')
-rw-r--r--drivers/media/pci/bt8xx/bttv-risc.c804
1 files changed, 804 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 0000000000..241a696e37
--- /dev/null
+++ b/drivers/media/pci/bt8xx/bttv-risc.c
@@ -0,0 +1,804 @@
+// 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 ((line >= (store_lines - VCR_HACK_LINES)) &&
+ btv->opt_vcr_hack)
+ 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;
+ WARN_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;
+ WARN_ON((risc->jmp - risc->cpu + 2) * sizeof(*risc->cpu) > risc->size);
+ 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 */
+
+static void bttv_set_risc_status(struct bttv *btv)
+{
+ unsigned long cmd = BT848_RISC_JUMP;
+ if (btv->loop_irq) {
+ cmd |= BT848_RISC_IRQ;
+ cmd |= (btv->loop_irq & 0x0f) << 16;
+ cmd |= (~btv->loop_irq & 0x0f) << 20;
+ }
+ btv->main.cpu[RISC_SLOT_LOOP] = cpu_to_le32(cmd);
+}
+
+static void bttv_set_irq_timer(struct bttv *btv)
+{
+ if (btv->curr.frame_irq || btv->loop_irq || btv->cvbi)
+ mod_timer(&btv->timeout, jiffies + BTTV_TIMEOUT);
+ else
+ del_timer(&btv->timeout);
+}
+
+static int bttv_set_capture_control(struct bttv *btv, int start_capture)
+{
+ int capctl = 0;
+
+ if (btv->curr.top || btv->curr.bottom)
+ capctl = BT848_CAP_CTL_CAPTURE_ODD |
+ BT848_CAP_CTL_CAPTURE_EVEN;
+
+ if (btv->cvbi)
+ capctl |= BT848_CAP_CTL_CAPTURE_VBI_ODD |
+ BT848_CAP_CTL_CAPTURE_VBI_EVEN;
+
+ capctl |= start_capture;
+
+ btaor(capctl, ~0x0f, BT848_CAP_CTL);
+
+ return capctl;
+}
+
+static void bttv_start_dma(struct bttv *btv)
+{
+ if (btv->dma_on)
+ return;
+ btwrite(btv->main.dma, BT848_RISC_STRT_ADD);
+ btor(BT848_GPIO_DMA_CTL_RISC_ENABLE | BT848_GPIO_DMA_CTL_FIFO_ENABLE,
+ BT848_GPIO_DMA_CTL);
+ btv->dma_on = 1;
+}
+
+static void bttv_stop_dma(struct bttv *btv)
+{
+ if (!btv->dma_on)
+ return;
+ btand(~(BT848_GPIO_DMA_CTL_RISC_ENABLE |
+ BT848_GPIO_DMA_CTL_FIFO_ENABLE), BT848_GPIO_DMA_CTL);
+ btv->dma_on = 0;
+}
+
+void bttv_set_dma(struct bttv *btv, int start_capture)
+{
+ int capctl = 0;
+
+ bttv_set_risc_status(btv);
+ bttv_set_irq_timer(btv);
+ capctl = bttv_set_capture_control(btv, start_capture);
+
+ if (capctl)
+ bttv_start_dma(btv);
+ else
+ bttv_stop_dma(btv);
+
+ 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);
+}
+
+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;
+}
+
+int bttv_buffer_risc_vbi(struct bttv *btv, struct bttv_buffer *buf)
+{
+ int r = 0;
+ unsigned int offset;
+ unsigned int bpl = 2044; /* max. vbipack */
+ unsigned int padding = VBI_BPL - bpl;
+ unsigned int skip_lines0 = 0;
+ unsigned int skip_lines1 = 0;
+ unsigned int min_vdelay = MIN_VDELAY;
+
+ const struct bttv_tvnorm *tvnorm = btv->vbi_fmt.tvnorm;
+ struct sg_table *sgt = vb2_dma_sg_plane_desc(&buf->vbuf.vb2_buf, 0);
+ struct scatterlist *list = sgt->sgl;
+
+ if (btv->vbi_fmt.fmt.count[0] > 0)
+ skip_lines0 = max(0, (btv->vbi_fmt.fmt.start[0] -
+ tvnorm->vbistart[0]));
+ if (btv->vbi_fmt.fmt.count[1] > 0)
+ skip_lines1 = max(0, (btv->vbi_fmt.fmt.start[1] -
+ tvnorm->vbistart[1]));
+
+ if (btv->vbi_fmt.fmt.count[0] > 0) {
+ r = bttv_risc_packed(btv, &buf->top, list, 0, bpl, padding,
+ skip_lines0, btv->vbi_fmt.fmt.count[0]);
+ if (r)
+ return r;
+ }
+
+ if (btv->vbi_fmt.fmt.count[1] > 0) {
+ offset = btv->vbi_fmt.fmt.count[0] * VBI_BPL;
+ r = bttv_risc_packed(btv, &buf->bottom, list, offset, bpl,
+ padding, skip_lines1,
+ btv->vbi_fmt.fmt.count[1]);
+ if (r)
+ return r;
+ }
+
+ if (btv->vbi_fmt.end >= tvnorm->cropcap.bounds.top)
+ min_vdelay += btv->vbi_fmt.end - tvnorm->cropcap.bounds.top;
+
+ /* For bttv_buffer_activate_vbi(). */
+ buf->geo.vdelay = min_vdelay;
+
+ return r;
+}
+
+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;
+
+ list_del(&vbi->list);
+
+ /* 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 (btv->vbi_count[0] > 0) {
+ top = &vbi->top;
+ top_irq_flags = 4;
+ }
+
+ if (btv->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) {
+ if (set->top->list.next)
+ list_del(&set->top->list);
+ } else {
+ if (set->top->list.next)
+ list_del(&set->top->list);
+ if (set->bottom->list.next)
+ list_del(&set->bottom->list);
+ }
+ 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) {
+ if (set->top->list.next)
+ list_del(&set->top->list);
+ 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) {
+ if (set->bottom->list.next)
+ list_del(&set->bottom->list);
+ 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)
+{
+ int r = 0;
+ const struct bttv_tvnorm *tvnorm = bttv_tvnorms + btv->tvnorm;
+ struct sg_table *sgt = vb2_dma_sg_plane_desc(&buf->vbuf.vb2_buf, 0);
+ struct scatterlist *list = sgt->sgl;
+ unsigned long size = (btv->fmt->depth * btv->width * btv->height) >> 3;
+
+ /* packed pixel modes */
+ if (btv->fmt->flags & FORMAT_FLAGS_PACKED) {
+ int bpl = (btv->fmt->depth >> 3) * btv->width;
+ int bpf = bpl * (btv->height >> 1);
+
+ bttv_calc_geo(btv, &buf->geo, btv->width, btv->height,
+ V4L2_FIELD_HAS_BOTH(buf->vbuf.field), tvnorm,
+ &btv->crop[!!btv->do_crop].rect);
+ switch (buf->vbuf.field) {
+ case V4L2_FIELD_TOP:
+ r = bttv_risc_packed(btv, &buf->top, list, 0, bpl, 0,
+ 0, btv->height);
+ break;
+ case V4L2_FIELD_BOTTOM:
+ r = bttv_risc_packed(btv, &buf->bottom, list, 0, bpl,
+ 0, 0, btv->height);
+ break;
+ case V4L2_FIELD_INTERLACED:
+ r = bttv_risc_packed(btv, &buf->top, list, 0, bpl,
+ bpl, 0, btv->height >> 1);
+ r = bttv_risc_packed(btv, &buf->bottom, list, bpl,
+ bpl, bpl, 0, btv->height >> 1);
+ break;
+ case V4L2_FIELD_SEQ_TB:
+ r = bttv_risc_packed(btv, &buf->top, list, 0, bpl, 0,
+ 0, btv->height >> 1);
+ r = bttv_risc_packed(btv, &buf->bottom, list, bpf,
+ bpl, 0, 0, btv->height >> 1);
+ break;
+ default:
+ WARN_ON(1);
+ return -EINVAL;
+ }
+ }
+ /* planar modes */
+ if (btv->fmt->flags & FORMAT_FLAGS_PLANAR) {
+ int uoffset, voffset;
+ int ypadding, cpadding, lines;
+
+ /* calculate chroma offsets */
+ uoffset = btv->width * btv->height;
+ voffset = btv->width * btv->height;
+ if (btv->fmt->flags & FORMAT_FLAGS_CrCb) {
+ /* Y-Cr-Cb plane order */
+ uoffset >>= btv->fmt->hshift;
+ uoffset >>= btv->fmt->vshift;
+ uoffset += voffset;
+ } else {
+ /* Y-Cb-Cr plane order */
+ voffset >>= btv->fmt->hshift;
+ voffset >>= btv->fmt->vshift;
+ voffset += uoffset;
+ }
+ switch (buf->vbuf.field) {
+ case V4L2_FIELD_TOP:
+ bttv_calc_geo(btv, &buf->geo, btv->width, btv->height,
+ 0, tvnorm,
+ &btv->crop[!!btv->do_crop].rect);
+ r = bttv_risc_planar(btv, &buf->top, list, 0,
+ btv->width, 0, btv->height,
+ uoffset, voffset,
+ btv->fmt->hshift,
+ btv->fmt->vshift, 0);
+ break;
+ case V4L2_FIELD_BOTTOM:
+ bttv_calc_geo(btv, &buf->geo, btv->width, btv->height,
+ 0, tvnorm,
+ &btv->crop[!!btv->do_crop].rect);
+ r = bttv_risc_planar(btv, &buf->bottom, list, 0,
+ btv->width, 0, btv->height,
+ uoffset, voffset,
+ btv->fmt->hshift,
+ btv->fmt->vshift, 0);
+ break;
+ case V4L2_FIELD_INTERLACED:
+ bttv_calc_geo(btv, &buf->geo, btv->width, btv->height,
+ 1, tvnorm,
+ &btv->crop[!!btv->do_crop].rect);
+ lines = btv->height >> 1;
+ ypadding = btv->width;
+ cpadding = btv->width >> btv->fmt->hshift;
+ r = bttv_risc_planar(btv, &buf->top, list, 0,
+ btv->width, ypadding, lines,
+ uoffset, voffset,
+ btv->fmt->hshift,
+ btv->fmt->vshift, cpadding);
+
+ r = bttv_risc_planar(btv, &buf->bottom, list,
+ ypadding, btv->width, ypadding,
+ lines, uoffset + cpadding,
+ voffset + cpadding,
+ btv->fmt->hshift,
+ btv->fmt->vshift, cpadding);
+ break;
+ case V4L2_FIELD_SEQ_TB:
+ bttv_calc_geo(btv, &buf->geo, btv->width, btv->height,
+ 1, tvnorm,
+ &btv->crop[!!btv->do_crop].rect);
+ lines = btv->height >> 1;
+ ypadding = btv->width;
+ cpadding = btv->width >> btv->fmt->hshift;
+ r = bttv_risc_planar(btv, &buf->top, list, 0,
+ btv->width, 0, lines,
+ uoffset >> 1, voffset >> 1,
+ btv->fmt->hshift,
+ btv->fmt->vshift, 0);
+ r = bttv_risc_planar(btv, &buf->bottom, list,
+ lines * ypadding,
+ btv->width, 0, lines,
+ lines * ypadding + (uoffset >> 1),
+ lines * ypadding + (voffset >> 1),
+ btv->fmt->hshift,
+ btv->fmt->vshift, 0);
+ break;
+ default:
+ WARN_ON(1);
+ return -EINVAL;
+ }
+ }
+ /* raw data */
+ if (btv->fmt->flags & FORMAT_FLAGS_RAW) {
+ /* build risc code */
+ buf->vbuf.field = V4L2_FIELD_SEQ_TB;
+ bttv_calc_geo(btv, &buf->geo, tvnorm->swidth, tvnorm->sheight,
+ 1, tvnorm, &btv->crop[!!btv->do_crop].rect);
+ r = bttv_risc_packed(btv, &buf->top, list, 0, RAW_BPL, 0, 0,
+ RAW_LINES);
+ r = bttv_risc_packed(btv, &buf->bottom, list, size / 2,
+ RAW_BPL, 0, 0, RAW_LINES);
+ }
+
+ /* copy format info */
+ buf->btformat = btv->fmt->btformat;
+ buf->btswap = btv->fmt->btswap;
+
+ return r;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 08:24:35 +0000