linux/drivers/media/pci/bt8xx/bttv-risc.c

// 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 <[email protected]>


*/

#define pr_fmt(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 …

/* ---------------------------------------------------------- */
/* 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)
{ … }

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)
{ … }

/* ---------------------------------------------------------- */

static void
bttv_calc_geo_old(struct bttv *btv, struct bttv_geometry *geo,
		  int width, int height, int interleaved,
		  const struct bttv_tvnorm *tvnorm)
{ … }

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)
{ … }

static void
bttv_apply_geo(struct bttv *btv, struct bttv_geometry *geo, int odd)
{ … }

/* ---------------------------------------------------------- */
/* risc group / risc main loop / dma management               */

static void bttv_set_risc_status(struct bttv *btv)
{ … }

static void bttv_set_irq_timer(struct bttv *btv)
{ … }

static int bttv_set_capture_control(struct bttv *btv, int start_capture)
{ … }

static void bttv_start_dma(struct bttv *btv)
{ … }

static void bttv_stop_dma(struct bttv *btv)
{ … }

void bttv_set_dma(struct bttv *btv, int start_capture)
{ … }

int
bttv_risc_init_main(struct bttv *btv)
{ … }

int
bttv_risc_hook(struct bttv *btv, int slot, struct btcx_riscmem *risc,
	       int irqflags)
{ … }

int bttv_buffer_risc_vbi(struct bttv *btv, struct bttv_buffer *buf)
{ … }

int
bttv_buffer_activate_vbi(struct bttv *btv,
			 struct bttv_buffer *vbi)
{ … }

int
bttv_buffer_activate_video(struct bttv *btv,
			   struct bttv_buffer_set *set)
{ … }

/* ---------------------------------------------------------- */

/* calculate geometry, build risc code */
int
bttv_buffer_risc(struct bttv *btv, struct bttv_buffer *buf)
{ … }