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/*
* Mach Operating System
* Copyright (c) 1991,1990,1989 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* File: cfb_hdw.c
* Author: Alessandro Forin, Carnegie Mellon University
* Date: 9/90
*
* Driver for the 3max Color Frame Buffer Display,
* hardware-level operations.
*/
#include <cfb.h>
#if (NCFB > 0)
#include <platforms.h>
#include <machine/machspl.h>
#include <mach/std_types.h>
#include <chips/busses.h>
#include <chips/screen_defs.h>
#include <chips/pm_defs.h>
typedef pm_softc_t cfb_softc_t;
#ifdef DECSTATION
#include <mips/PMAX/pmag_ba.h>
#include <mips/PMAX/tc.h>
#endif
#ifdef FLAMINGO
#include <mips/PMAX/pmag_ba.h> /* XXX fixme */
#include <alpha/DEC/tc.h>
#endif
/*
* Definition of the driver for the auto-configuration program.
*/
int cfb_probe(), cfb_intr();
static void cfb_attach();
vm_offset_t cfb_std[NCFB] = { 0 };
struct bus_device *cfb_info[NCFB];
struct bus_driver cfb_driver =
{ cfb_probe, 0, cfb_attach, 0, cfb_std, "cfb", cfb_info,
0, 0, BUS_INTR_DISABLED};
/*
* Probe/Attach functions
*/
cfb_probe( /* reg, ui */)
{
static probed_once = 0;
/*
* Probing was really done sweeping the TC long ago
*/
if (tc_probe("cfb") == 0)
return 0;
if (probed_once++ > 1)
printf("[mappable] ");
return 1;
}
static void
cfb_attach(ui)
struct bus_device *ui;
{
/* ... */
printf(": color display");
}
/*
* Interrupt routine
*/
cfb_intr(unit,spllevel)
spl_t spllevel;
{
register volatile char *ack;
/* acknowledge interrupt */
ack = (volatile char *) cfb_info[unit]->address + CFB_OFFSET_IREQ;
*ack = 0;
#ifdef mips
splx(spllevel);
#endif
lk201_led(unit);
}
cfb_vretrace(cfb, on)
cfb_softc_t *cfb;
{
int i;
for (i = 0; i < NCFB; i++)
if (cfb_info[i]->address == (vm_offset_t)cfb->framebuffer)
break;
if (i == NCFB) return;
(*tc_enable_interrupt)(cfb_info[i]->adaptor, on, 0);
}
/*
* Boot time initialization: must make device
* usable as console asap.
*/
extern int
cfb_soft_reset(), cfb_set_status(),
bt459_pos_cursor(), bt459_video_on(),
bt459_video_off(), cfb_vretrace(),
pm_get_status(), pm_char_paint(),
pm_insert_line(), pm_remove_line(),
pm_clear_bitmap(), pm_map_page();
static struct screen_switch cfb_sw = {
screen_noop, /* graphic_open */
cfb_soft_reset, /* graphic_close */
cfb_set_status, /* set_status */
pm_get_status, /* get_status */
pm_char_paint, /* char_paint */
bt459_pos_cursor, /* pos_cursor */
pm_insert_line, /* insert_line */
pm_remove_line, /* remove_line */
pm_clear_bitmap, /* clear_bitmap */
bt459_video_on, /* video_on */
bt459_video_off, /* video_off */
cfb_vretrace, /* intr_enable */
pm_map_page /* map_page */
};
cfb_cold_init(unit, up)
user_info_t *up;
{
cfb_softc_t *cfb;
screen_softc_t sc = screen(unit);
int base = tc_probe("cfb");
bcopy(&cfb_sw, &sc->sw, sizeof(sc->sw));
sc->flags |= COLOR_SCREEN;
sc->frame_scanline_width = 1024;
sc->frame_height = 1024;
sc->frame_visible_width = 1024;
sc->frame_visible_height = 864;
pm_init_screen_params(sc,up);
(void) screen_up(unit, up);
cfb = pm_alloc(unit, base + CFB_OFFSET_BT459, base + CFB_OFFSET_VRAM, -1);
screen_default_colors(up);
cfb_soft_reset(sc);
/*
* Clearing the screen at boot saves from scrolling
* much, and speeds up booting quite a bit.
*/
screen_blitc( unit, 'C'-'@');/* clear screen */
}
#endif (NCFB > 0)
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