path: root/drivers/media/video/davinci/vpbe_osd.c

/*
 * Copyright (C) 2007-2010 Texas Instruments Inc
 * Copyright (C) 2007 MontaVista Software, Inc.
 *
 * Andy Lowe (alowe@mvista.com), MontaVista Software
 * - Initial version
 * Murali Karicheri (mkaricheri@gmail.com), Texas Instruments Ltd.
 * - ported to sub device interface
 *
 * 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 version 2.
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/slab.h>

#include <mach/io.h>
#include <mach/cputype.h>
#include <mach/hardware.h>

#include <media/davinci/vpss.h>
#include <media/v4l2-device.h>
#include <media/davinci/vpbe_types.h>
#include <media/davinci/vpbe_osd.h>

#include <linux/io.h>
#include "vpbe_osd_regs.h"

#define MODULE_NAME	VPBE_OSD_SUBDEV_NAME

/* register access routines */
static inline u32 osd_read(struct osd_state *sd, u32 offset)
{
	struct osd_state *osd = sd;

	return readl(osd->osd_base + offset);
}

static inline u32 osd_write(struct osd_state *sd, u32 val, u32 offset)
{
	struct osd_state *osd = sd;

	writel(val, osd->osd_base + offset);

	return val;
}

static inline u32 osd_set(struct osd_state *sd, u32 mask, u32 offset)
{
	struct osd_state *osd = sd;

	u32 addr = osd->osd_base + offset;
	u32 val = readl(addr) | mask;

	writel(val, addr);

	return val;
}

static inline u32 osd_clear(struct osd_state *sd, u32 mask, u32 offset)
{
	struct osd_state *osd = sd;

	u32 addr = osd->osd_base + offset;
	u32 val = readl(addr) & ~mask;

	writel(val, addr);

	return val;
}

static inline u32 osd_modify(struct osd_state *sd, u32 mask, u32 val,
				 u32 offset)
{
	struct osd_state *osd = sd;

	u32 addr = osd->osd_base + offset;
	u32 new_val = (readl(addr) & ~mask) | (val & mask);

	writel(new_val, addr);

	return new_val;
}

/* define some macros for layer and pixfmt classification */
#define is_osd_win(layer) (((layer) == WIN_OSD0) || ((layer) == WIN_OSD1))
#define is_vid_win(layer) (((layer) == WIN_VID0) || ((layer) == WIN_VID1))
#define is_rgb_pixfmt(pixfmt) \
	(((pixfmt) == PIXFMT_RGB565) || ((pixfmt) == PIXFMT_RGB888))
#define is_yc_pixfmt(pixfmt) \
	(((pixfmt) == PIXFMT_YCbCrI) || ((pixfmt) == PIXFMT_YCrCbI) || \
	((pixfmt) == PIXFMT_NV12))
#define MAX_WIN_SIZE OSD_VIDWIN0XP_V0X
#define MAX_LINE_LENGTH (OSD_VIDWIN0OFST_V0LO << 5)

/**
 * _osd_dm6446_vid0_pingpong() - field inversion fix for DM6446
 * @sd - ptr to struct osd_state
 * @field_inversion - inversion flag
 * @fb_base_phys - frame buffer address
 * @lconfig - ptr to layer config
 *
 * This routine implements a workaround for the field signal inversion silicon
 * erratum described in Advisory 1.3.8 for the DM6446.  The fb_base_phys and
 * lconfig parameters apply to the vid0 window.  This routine should be called
 * whenever the vid0 layer configuration or start address is modifi