338 lines
6.9 KiB
C
338 lines
6.9 KiB
C
/* $NetBSD: fb.c,v 1.7 2001/09/19 18:10:34 thorpej Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1992, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This software was developed by the Computer Systems Engineering group
|
|
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
|
|
* contributed to Berkeley.
|
|
*
|
|
* All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Lawrence Berkeley Laboratory.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)fb.c 8.1 (Berkeley) 6/11/93
|
|
*/
|
|
|
|
/*
|
|
* /dev/fb (indirect frame buffer driver).
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/device.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/proc.h>
|
|
|
|
#include <machine/eeprom.h>
|
|
#include <dev/sun/fbio.h>
|
|
|
|
#include <sun3/dev/fbvar.h>
|
|
#include <sun3/dev/p4reg.h>
|
|
|
|
cdev_decl(fb);
|
|
|
|
static struct fbdevice *devfb;
|
|
static int fbpriority;
|
|
|
|
/*
|
|
* This is called by the real driver (i.e. bw2, cg3, ...)
|
|
* to declare itself as a potential default frame buffer.
|
|
*/
|
|
void
|
|
fb_attach(fb, newpri)
|
|
struct fbdevice *fb;
|
|
int newpri;
|
|
{
|
|
if (fbpriority < newpri) {
|
|
fbpriority = newpri;
|
|
devfb = fb;
|
|
}
|
|
}
|
|
|
|
int
|
|
fbopen(dev, flags, mode, p)
|
|
dev_t dev;
|
|
int flags, mode;
|
|
struct proc *p;
|
|
{
|
|
|
|
if (devfb == NULL)
|
|
return (ENXIO);
|
|
return ((*devfb->fb_driver->fbd_open)(dev, flags, mode, p));
|
|
}
|
|
|
|
int
|
|
fbclose(dev, flags, mode, p)
|
|
dev_t dev;
|
|
int flags, mode;
|
|
struct proc *p;
|
|
{
|
|
|
|
return ((*devfb->fb_driver->fbd_close)(dev, flags, mode, p));
|
|
}
|
|
|
|
int
|
|
fbioctl(dev, cmd, data, flags, p)
|
|
dev_t dev;
|
|
u_long cmd;
|
|
caddr_t data;
|
|
int flags;
|
|
struct proc *p;
|
|
{
|
|
return (fbioctlfb(devfb, cmd, data));
|
|
}
|
|
|
|
paddr_t
|
|
fbmmap(dev, off, prot)
|
|
dev_t dev;
|
|
off_t off;
|
|
int prot;
|
|
{
|
|
return ((*devfb->fb_driver->fbd_mmap)(dev, off, prot));
|
|
}
|
|
|
|
/*
|
|
* Common fb ioctl function
|
|
*/
|
|
int
|
|
fbioctlfb(fb, cmd, data)
|
|
struct fbdevice *fb;
|
|
u_long cmd;
|
|
caddr_t data;
|
|
{
|
|
struct fbdriver *fbd = fb->fb_driver;
|
|
void *vp = (void *)data;
|
|
int error;
|
|
|
|
switch (cmd) {
|
|
|
|
case FBIOGTYPE:
|
|
*(struct fbtype *)vp = fb->fb_fbtype;
|
|
error = 0;
|
|
break;
|
|
|
|
case FBIOGATTR:
|
|
error = (*fbd->fbd_gattr)(fb, vp);
|
|
break;
|
|
|
|
case FBIOGVIDEO:
|
|
error = (*fbd->fbd_gvideo)(fb, vp);
|
|
break;
|
|
|
|
case FBIOSVIDEO:
|
|
error = (*fbd->fbd_svideo)(fb, vp);
|
|
break;
|
|
|
|
case FBIOGETCMAP:
|
|
error = (*fbd->fbd_getcmap)(fb, vp);
|
|
break;
|
|
|
|
case FBIOPUTCMAP:
|
|
error = (*fbd->fbd_putcmap)(fb, vp);
|
|
break;
|
|
|
|
default:
|
|
error = ENOTTY;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
void
|
|
fb_unblank()
|
|
{
|
|
int on = 1;
|
|
|
|
if (devfb == NULL)
|
|
return;
|
|
|
|
(*devfb->fb_driver->fbd_svideo)(devfb, (void *)&on);
|
|
}
|
|
|
|
/*
|
|
* Default ioctl function to put in struct fbdriver
|
|
* for functions that are not supported.
|
|
*/
|
|
int
|
|
fb_noioctl(fbd, vp)
|
|
struct fbdevice *fbd;
|
|
void *vp;
|
|
{
|
|
return ENOTTY;
|
|
}
|
|
|
|
/****************************************************************
|
|
* Misc. helpers...
|
|
*/
|
|
|
|
/* Set FB size based on EEPROM screen shape code. */
|
|
void
|
|
fb_eeprom_setsize(fb)
|
|
struct fbdevice *fb;
|
|
{
|
|
int szcode;
|
|
int w, h;
|
|
|
|
/* Go get the EEPROM screen size byte. */
|
|
szcode = eeprom_copy->eeScreenSize;
|
|
|
|
w = h = 0;
|
|
switch (szcode) {
|
|
case EE_SCR_1152X900:
|
|
w = 1152;
|
|
h = 900;
|
|
break;
|
|
case EE_SCR_1024X1024:
|
|
w = 1024;
|
|
h = 1024;
|
|
break;
|
|
case EE_SCR_1600X1280:
|
|
w = 1600;
|
|
h = 1280;
|
|
break;
|
|
case EE_SCR_1440X1440:
|
|
w = 1440;
|
|
h = 1440;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (w && h) {
|
|
fb->fb_fbtype.fb_width = w;
|
|
fb->fb_fbtype.fb_height = h;
|
|
} else {
|
|
printf("%s: EE size code %d unknown\n",
|
|
fb->fb_name, szcode);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Probe for a P4 register at the passed virtual address.
|
|
* Returns P4 ID value, or -1 if no P4 register.
|
|
*/
|
|
int
|
|
fb_pfour_id(va)
|
|
void *va;
|
|
{
|
|
volatile u_int32_t val, save, *pfour = va;
|
|
|
|
/* Read the P4 register. */
|
|
save = *pfour;
|
|
|
|
/*
|
|
* Try to modify the type code. If it changes, put the
|
|
* original value back, and tell the caller that the
|
|
* framebuffer does not have a P4 register.
|
|
*/
|
|
val = save & ~P4_REG_RESET;
|
|
*pfour = (val ^ P4_FBTYPE_MASK);
|
|
if ((*pfour ^ val) & P4_FBTYPE_MASK) {
|
|
*pfour = save;
|
|
return (-1);
|
|
}
|
|
|
|
return (P4_ID(val));
|
|
}
|
|
|
|
/*
|
|
* Return the status of the video enable.
|
|
*/
|
|
int
|
|
fb_pfour_get_video(fb)
|
|
struct fbdevice *fb;
|
|
{
|
|
|
|
return ((*fb->fb_pfour & P4_REG_VIDEO) != 0);
|
|
}
|
|
|
|
/*
|
|
* Turn video on or off using the P4 register.
|
|
*/
|
|
void
|
|
fb_pfour_set_video(fb, on)
|
|
struct fbdevice *fb;
|
|
int on;
|
|
{
|
|
int pfour;
|
|
|
|
pfour = *fb->fb_pfour & ~(P4_REG_INTCLR|P4_REG_VIDEO);
|
|
*fb->fb_pfour = pfour | (on ? P4_REG_VIDEO : 0);
|
|
}
|
|
|
|
static const struct {
|
|
int w, h;
|
|
} fb_p4sizedecode[P4_SIZE_MASK+1] = {
|
|
{ 1600, 1280 },
|
|
{ 1152, 900 },
|
|
{ 1024, 1024 },
|
|
{ 1280, 1024 },
|
|
{ 1440, 1440 },
|
|
{ 640, 480 },
|
|
};
|
|
|
|
/*
|
|
* Use the P4 register to determine the screen size.
|
|
*/
|
|
void
|
|
fb_pfour_setsize(fb)
|
|
struct fbdevice *fb;
|
|
{
|
|
int p4, p4type, p4size;
|
|
int h, w;
|
|
|
|
if (fb->fb_pfour == 0)
|
|
return;
|
|
|
|
p4 = *fb->fb_pfour;
|
|
p4type = P4_FBTYPE(p4);
|
|
|
|
/* These do not encode the screen size. */
|
|
if (p4type == P4_ID_COLOR24)
|
|
return;
|
|
if ((p4type & P4_ID_MASK) == P4_ID_FASTCOLOR)
|
|
return;
|
|
|
|
p4size = p4type & P4_SIZE_MASK;
|
|
w = fb_p4sizedecode[p4size].w;
|
|
h = fb_p4sizedecode[p4size].h;
|
|
if (w && h) {
|
|
fb->fb_fbtype.fb_width = w;
|
|
fb->fb_fbtype.fb_height = h;
|
|
} else {
|
|
printf("%s: P4 size code %d unknown\n",
|
|
fb->fb_name, p4size);
|
|
}
|
|
}
|