path: root/drivers/video/console/sticore.c

/*
 *  linux/drivers/video/console/sticore.c -
 *	core code for console driver using HP's STI firmware
 *
 *	Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
 *	Copyright (C) 2001-2013 Helge Deller <deller@gmx.de>
 *	Copyright (C) 2001-2002 Thomas Bogendoerfer <tsbogend@alpha.franken.de>
 * 
 * TODO:
 * - call STI in virtual mode rather than in real mode
 * - screen blanking with state_mgmt() in text mode STI ? 
 * - try to make it work on m68k hp workstations ;)
 * 
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/font.h>

#include <asm/hardware.h>
#include <asm/page.h>
#include <asm/parisc-device.h>
#include <asm/pdc.h>
#include <asm/cacheflush.h>
#include <asm/grfioctl.h>

#include "../fbdev/sticore.h"

#define STI_DRIVERVERSION "Version 0.9b"

static struct sti_struct *default_sti __read_mostly;

/* number of STI ROMS found and their ptrs to each struct */
static int num_sti_roms __read_mostly;
static struct sti_struct *sti_roms[MAX_STI_ROMS] __read_mostly;


/* The colour indices used by STI are
 *   0 - Black
 *   1 - White
 *   2 - Red
 *   3 - Yellow/Brown
 *   4 - Green
 *   5 - Cyan
 *   6 - Blue
 *   7 - Magenta
 *
 * So we have the same colours as VGA (basically one bit each for R, G, B),
 * but have to translate them, anyway. */

static const u8 col_trans[8] = {
        0, 6, 4, 5,
        2, 7, 3, 1
};

#define c_fg(sti, c) col_trans[((c>> 8) & 7)]
#define c_bg(sti, c) col_trans[((c>>11) & 7)]
#define c_index(sti, c) ((c) & 0xff)

static const struct sti_init_flags default_init_flags = {
	.wait	= STI_WAIT, 
	.reset	= 1,
	.text	= 1, 
	.nontext = 1,
	.no_chg_bet = 1, 
	.no_chg_bei = 1, 
	.init_cmap_tx = 1,
};

static int sti_init_graph(struct sti_struct *sti)
{
	struct sti_init_inptr *inptr = &sti->sti_data->init_inptr;
	struct sti_init_inptr_ext *inptr_ext = &sti->sti_data->init_inptr_ext;
	struct sti_init_outptr *outptr = &sti->sti_data->init_outptr;
	unsigned long flags;
	int ret, err;

	spin_lock_irqsave(&sti->lock, flags);

	memset(inptr, 0, sizeof(*inptr));
	inptr->text_planes = 3; /* # of text planes (max 3 for STI) */
	memset(inptr_ext, 0, sizeof(*inptr_ext));
	inptr->ext_ptr = STI_PTR(inptr_ext);
	outptr->errno = 0;

	ret = sti_call(sti, sti->init_graph, &default_init_flags, inptr,
		outptr, sti->glob_cfg);

	if (ret >= 0)
		sti->text_planes = outptr->text_planes;
	err = outptr->errno;

	spin_unlock_irqrestore(&sti->lock, flags);

	if (ret < 0) {
		pr_err("STI init_graph failed (ret %d, errno %d)\n", ret, err);
		return -1;
	}
	
	return 0;
}

static const struct sti_conf_flags default_conf_flags = {
	.wait	= STI_WAIT,
};

static void sti_inq_conf(struct sti_struct *sti)
{
	struct sti_conf_inptr *inptr = &sti->sti_data->inq_inptr;
	struct sti_conf_outptr *outptr = &sti->sti_data->inq_outptr;
	unsigned long flags;
	s32 ret;

	outptr->ext_ptr = STI_PTR(&sti->sti_data->inq_outptr_ext);
	
	do {
		spin_lock_irqsave(&sti->lock, flags);
		memset(inptr, 0, sizeof(*inptr));
		ret = sti_call(sti, sti->inq_conf, &default_conf_flags,
			inptr, outptr, sti->glob_cfg);
		spin_unlock_irqrestore(&sti->lock, flags);
	} while (ret == 1);
}

static const struct sti_font_flags default_font_flags = {
	.wait		= STI_WAIT,
	.non_text	=