path: root/drivers/video/fbdev/tgafb.c

/*
 *  linux/drivers/video/tgafb.c -- DEC 21030 TGA frame buffer device
 *
 *	Copyright (C) 1995 Jay Estabrook
 *	Copyright (C) 1997 Geert Uytterhoeven
 *	Copyright (C) 1999,2000 Martin Lucina, Tom Zerucha
 *	Copyright (C) 2002 Richard Henderson
 *	Copyright (C) 2006, 2007  Maciej W. Rozycki
 *
 *  This file is subject to the terms and conditions of the GNU General Public
 *  License. See the file COPYING in the main directory of this archive for
 *  more details.
 */

#include <linux/bitrev.h>
#include <linux/compiler.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/selection.h>
#include <linux/string.h>
#include <linux/tc.h>

#include <asm/io.h>

#include <video/tgafb.h>

#ifdef CONFIG_TC
#define TGA_BUS_TC(dev) (dev->bus == &tc_bus_type)
#else
#define TGA_BUS_TC(dev) 0
#endif

/*
 * Local functions.
 */

static int tgafb_check_var(struct fb_var_screeninfo *, struct fb_info *);
static int tgafb_set_par(struct fb_info *);
static void tgafb_set_pll(struct tga_par *, int);
static int tgafb_setcolreg(unsigned, unsigned, unsigned, unsigned,
			   unsigned, struct fb_info *);
static int tgafb_blank(int, struct fb_info *);
static void tgafb_init_fix(struct fb_info *);

static void tgafb_imageblit(struct fb_info *, const struct fb_image *);
static void tgafb_fillrect(struct fb_info *, const struct fb_fillrect *);
static void tgafb_copyarea(struct fb_info *, const struct fb_copyarea *);
static int tgafb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info);

static int tgafb_register(struct device *dev);
static void tgafb_unregister(struct device *dev);

static const char *mode_option;
static const char *mode_option_pci = "640x480@60";
static const char *mode_option_tc = "1280x1024@72";


static struct pci_driver tgafb_pci_driver;
static struct tc_driver tgafb_tc_driver;

/*
 *  Frame buffer operations
 */

static struct fb_ops tgafb_ops = {
	.owner			= THIS_MODULE,
	.fb_check_var		= tgafb_check_var,
	.fb_set_par		= tgafb_set_par,
	.fb_setcolreg		= tgafb_setcolreg,
	.fb_blank		= tgafb_blank,
	.fb_pan_display		= tgafb_pan_display,
	.fb_fillrect		= tgafb_fillrect,
	.fb_copyarea		= tgafb_copyarea,
	.fb_imageblit		= tgafb_imageblit,
};


#ifdef CONFIG_PCI
/*
 *  PCI registration operations
 */
static int tgafb_pci_register(struct pci_dev *, const struct pci_device_id *);
static void tgafb_pci_unregister(struct pci_dev *);

static struct pci_device_id const tgafb_pci_table[] = {
	{ PCI_DEVICE(PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_TGA) },
	{ }
};
MODULE_DEVICE_TABLE(pci, tgafb_pci_table);

static struct pci_driver tgafb_pci_driver = {
	.name			= "tgafb",
	.id_table		= tgafb_pci_table,
	.probe			= tgafb_pci_register,
	.remove			= tgafb_pci_unregister,
};

static int tgafb_pci_register(struct pci_dev *pdev,
			      const struct pci_device_id *ent)
{
	return tgafb_register(&pdev->dev);
}

static void tgafb_pci_unregister(struct pci_dev *pdev)
{
	tgafb_unregister(&pdev->dev);
}
#endif /* CONFIG_PCI */

#ifdef CONFIG_TC
/*
 *  TC registration operations
 */
static int tgafb_tc_register(struct device *);
static int tgafb_tc_unregister(struct device *);

static struct tc_device_id const tgafb_tc_table[] = {
	{ "DEC     ", "PMAGD-AA" },
	{ "DEC     ", "PMAGD   " },
	{ }
};
MODULE_DEVICE_TABLE(tc, tgafb_tc_table);

static struct tc_driver tgafb_tc_driver = {
	.id_table		= tgafb_tc_table,
	.driver			= {
		.name		= "tgafb",
		.bus		= &tc_bus_type,
		.probe		= tgafb_tc_register,
		.remove		= tgafb_tc_unregister,
	},
};

static int tgafb_tc_register(struct device *dev)
{
	int status = tgafb_register(dev);
	if (!status)
		get_device(dev);
	return status;
}

static int tgafb_tc_unregister(struct device *dev)
{
	put_device(dev);
	tgafb_unregister(dev);
	return 0;
}
#endif /* CONFIG_TC */


/**
 *      tgafb_check_var - Optional function.  Validates a var passed in.
 *      @var: frame buffer variable screen structure
 *      @info: frame buffer structure that represents a single frame buffer
 */
static int
tgafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
	struct tga_par *par = (struct tga_par *)info->par;

	if (par->tga_type == TGA_TYPE_8PLANE) {
		if (var->bits_per_pixel != 8)