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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: xcfb_hdw.c
* Author: Alessandro Forin, Carnegie Mellon University
* Date: 1/92
*
* Driver for the MAXine Color Frame Buffer Display,
* hardware-level operations.
*/
#include <xcfb.h>
#if (NXCFB > 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>
#include <machine/machspl.h>
#ifdef MAXINE
#include <chips/xcfb_monitor.h>
#include <mips/PMAX/pmag_xine.h>
#include <mips/PMAX/tc.h>
#define enable_interrupt(s,o,x) (*tc_enable_interrupt)(s,o,x)
#else /* MAXINE */
You must say the magic words to get the coockies:
#define enable_interrupt(slot,on,xx)
#define IMS332_ADDRESS
#define VRAM_OFFSET
#define IMS332_RESET_ADDRESS
#endif /* MAXINE */
typedef pm_softc_t xcfb_softc_t;
/*
* Definition of the driver for the auto-configuration program.
*/
int xcfb_probe(), xcfb_intr();
static void xcfb_attach();
vm_offset_t xcfb_std[NXCFB] = { 0 };
struct bus_device *xcfb_info[NXCFB];
struct bus_driver xcfb_driver =
{ xcfb_probe, 0, xcfb_attach, 0, xcfb_std, "xcfb", xcfb_info,
0, 0, BUS_INTR_DISABLED};
/*
* Probe/Attach functions
*/
xcfb_probe( /* reg, ui */)
{
static probed_once = 0;
/*
* Probing was really done sweeping the TC long ago
*/
if (tc_probe("xcfb") == 0)
return 0;
if (probed_once++ > 1)
printf("[mappable] ");
return 1;
}
static void
xcfb_attach(ui)
struct bus_device *ui;
{
/* ... */
printf(": color display");
}
/*
* Interrupt routine
*/
xcfb_intr(unit,spllevel)
spl_t spllevel;
{
/* interrupt has been acknowledge already */
#if 0
splx(spllevel);
/* XXX make it load the unsafe things */
#endif
}
xcfb_vretrace(xcfb, on)
xcfb_softc_t *xcfb;
{
int i;
for (i = 0; i < NXCFB; i++)
if (xcfb_info[i]->address == (vm_offset_t)xcfb->framebuffer)
break;
if (i == NXCFB) return;
enable_interrupt(xcfb_info[i]->adaptor, on, 0);
}
/*
* Boot time initialization: must make device
* usable as console asap.
*/
/* some of these values are made up using ad hocery */
static struct xcfb_monitor_type monitors[] = {
{ "VRM17", 1024, 768, 1024, 1024, 16, 33,
6, 2, 2, 21, 326, 16, 10, 10 },
/* XXX Add VRC16 */
{ "VR262", 1024, 864, 1024, 1024, 16, 35,
5, 3, 3, 37, 330, 16, 10, 10 },
{ "VR299", 1024, 864, 1024, 1024, 16, 35,
5, 3, 3, 37, 330, 16, 10, 10 },
{ 0 }};
/* set from prom command line */
extern unsigned char *monitor_types[4];
xcfb_monitor_type_t xcfb_get_monitor_type()
{
xcfb_monitor_type_t m;
m = monitors;
if (monitor_types[3])
while (m->name) {
/* xcfb is always on the motherboard (slot 3),
fix if you need */
if (!strcmp(monitor_types[3], m->name))
break;
m++;
}
if (!m->name) /* the first is the default */
m = monitors;
return m;
}
extern int
xcfb_soft_reset(), xcfb_set_status(),
ims332_pos_cursor(), ims332_video_on(),
ims332_video_off(), xcfb_vretrace(),
pm_get_status(), pm_char_paint(),
pm_insert_line(), pm_remove_line(),
pm_clear_bitmap(), pm_map_page();
static struct screen_switch xcfb_sw = {
screen_noop, /* graphic_open */
xcfb_soft_reset, /* graphic_close */
xcfb_set_status, /* set_status */
pm_get_status, /* get_status */
pm_char_paint, /* char_paint */
ims332_pos_cursor, /* pos_cursor */
pm_insert_line, /* insert_line */
pm_remove_line, /* remove_line */
pm_clear_bitmap, /* clear_bitmap */
ims332_video_on, /* video_on */
ims332_video_off, /* video_off */
xcfb_vretrace, /* intr_enable */
pm_map_page /* map_page */
};
xcfb_cold_init(unit, up)
user_info_t *up;
{
xcfb_softc_t *xcfb;
screen_softc_t sc = screen(unit);
int base = tc_probe("xcfb");
xcfb_monitor_type_t m = xcfb_get_monitor_type();
bcopy(&xcfb_sw, &sc->sw, sizeof(sc->sw));
sc->flags |= COLOR_SCREEN; /* XXX should come from m->flags? */
sc->frame_scanline_width = m->frame_scanline_width;
sc->frame_height = m->frame_height;
sc->frame_visible_width = m->frame_visible_width;
sc->frame_visible_height = m->frame_visible_height;
pm_init_screen_params(sc, up);
(void) screen_up(unit, up);
xcfb = pm_alloc(unit, IMS332_ADDRESS, base + VRAM_OFFSET, 0);
xcfb->vdac_registers = (char *)IMS332_RESET_ADDRESS;
screen_default_colors(up);
xcfb_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 (NXCFB > 0)
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