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/*
* linux/drivers/video/stifb.c - Generic frame buffer driver for HP
* workstations with STI (standard text interface) video firmware.
*
* Based on:
* linux/drivers/video/artistfb.c -- Artist frame buffer driver
*
* Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
*
* based on skeletonfb, which was
* Created 28 Dec 1997 by Geert Uytterhoeven
*
* 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. */
/*
* Notes:
*
* This driver assumes that the video has been set up in 1bpp mode by
* the firmware. Since HP video tends to be planar rather than
* packed-pixel this will probably work anyway even if it isn't.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <video/fbcon.h>
#include "sti.h"
static struct fb_ops stifb_ops;
struct stifb_info {
struct fb_info_gen gen;
struct sti_struct *sti;
};
struct stifb_par {
};
static struct stifb_info fb_info;
static struct display disp;
int stifb_init(void);
int stifb_setup(char*);
extern struct display_switch fbcon_sti;
/* ------------------- chipset specific functions -------------------------- */
static int
sti_encode_fix(struct fb_fix_screeninfo *fix,
const void *par, struct fb_info_gen *info)
{
/* XXX: what about smem_len? */
fix->smem_start = PTR_STI(fb_info.sti->glob_cfg)->region_ptrs[1];
fix->type = FB_TYPE_PLANES; /* well, sort of */
return 0;
}
static int
sti_decode_var(const struct fb_var_screeninfo *var,
void *par, struct fb_info_gen *info)
{
return 0;
}
static int
sti_encode_var(struct fb_var_screeninfo *var,
const void *par, struct fb_info_gen *info)
{
var->xres = PTR_STI(fb_info.sti->glob_cfg)->onscreen_x;
var->yres = PTR_STI(fb_info.sti->glob_cfg)->onscreen_y;
var->xres_virtual = PTR_STI(fb_info.sti->glob_cfg)->total_x;
var->yres_virtual = PTR_STI(fb_info.sti->glob_cfg)->total_y;
var->xoffset = var->yoffset = 0;
var->bits_per_pixel = 1;
var->grayscale = 0;
return 0;
}
static void
sti_get_par(void *par, struct fb_info_gen *info)
{
}
static void
sti_set_par(const void *par, struct fb_info_gen *info)
{
}
static int
sti_getcolreg(unsigned regno, unsigned *red, unsigned *green,
unsigned *blue, unsigned *transp, struct fb_info *info)
{
return 0;
}
static int
sti_setcolreg(unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp, struct fb_info *info)
{
return 0;
}
static void
sti_set_disp(const void *par, struct display *disp,
struct fb_info_gen *info)
{
disp->screen_base =
(void *) PTR_STI(fb_info.sti->glob_cfg)->region_ptrs[1];
disp->dispsw = &fbcon_sti;
}
static void
sti_detect(void)
{
}
static int
sti_blank(int blank_mode, const struct fb_info *info)
{
return 0;
}
/* ------------ Interfaces to hardware functions ------------ */
struct fbgen_hwswitch sti_switch = {
detect: sti_detect,
encode_fix: sti_encode_fix,
decode_var: sti_decode_var,
encode_var: sti_encode_var,
get_par: sti_get_par,
set_par: sti_set_par,
getcolreg: sti_getcolreg,
setcolreg: sti_setcolreg,
pan_display: NULL,
blank: sti_blank,
set_disp: sti_set_disp
};
/* ------------ Hardware Independent Functions ------------ */
/*
* Initialization
*/
int __init
stifb_init(void)
{
printk("searching for word mode STI ROMs\n");
/* XXX: in the future this will return a list of ROMs */
if ((fb_info.sti = sti_init_roms()) == NULL)
return -ENXIO;
fb_info.gen.info.node = -1;
fb_info.gen.info.flags = FBINFO_FLAG_DEFAULT;
fb_info.gen.info.fbops = &stifb_ops;
fb_info.gen.info.disp = &disp;
fb_info.gen.info.changevar = NULL;
fb_info.gen.info.switch_con = &fbgen_switch;
fb_info.gen.info.updatevar = &fbgen_update_var;
fb_info.gen.info.blank = &fbgen_blank;
strcpy(fb_info.gen.info.modename, "STI Generic");
fb_info.gen.fbhw = &sti_switch;
fb_info.gen.fbhw->detect();
/* This should give a reasonable default video mode */
fbgen_get_var(&disp.var, -1, &fb_info.gen.info);
fbgen_do_set_var(&disp.var, 1, &fb_info.gen);
fbgen_set_disp(-1, &fb_info.gen);
fbgen_install_cmap(0, &fb_info.gen);
pdc_console_die();
if (register_framebuffer(&fb_info.gen.info) < 0)
return -EINVAL;
printk(KERN_INFO "fb%d: %s frame buffer device\n",
GET_FB_IDX(fb_info.gen.info.node), fb_info.gen.info.modename);
return 0;
}
/*
* Cleanup
*/
void
stifb_cleanup(struct fb_info *info)
{
printk("stifb_cleanup: you're on crack\n");
}
int __init
stifb_setup(char *options)
{
/* XXX: we should take the resolution, bpp as command line arguments. */
return 0;
}
/* ------------------------------------------------------------------------- */
static struct fb_ops stifb_ops = {
owner: THIS_MODULE,
fb_open: NULL,
fb_release: NULL,
fb_get_fix: fbgen_get_fix,
fb_get_var: fbgen_get_var,
fb_set_var: fbgen_set_var,
fb_get_cmap: fbgen_get_cmap,
fb_set_cmap: fbgen_set_cmap,
fb_pan_display: fbgen_pan_display,
fb_ioctl: NULL
};
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