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/* $NetBSD: fb.c,v 1.16 2014/07/25 08:10:35 dholland 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. 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: fb.c,v 1.16 2014/07/25 08:10:35 dholland Exp $");
#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>
dev_type_open(fbopen);
dev_type_close(fbclose);
dev_type_ioctl(fbioctl);
dev_type_mmap(fbmmap);
const struct cdevsw fb_cdevsw = {
.d_open = fbopen,
.d_close = fbclose,
.d_read = noread,
.d_write = nowrite,
.d_ioctl = fbioctl,
.d_stop = nostop,
.d_tty = notty,
.d_poll = nopoll,
.d_mmap = fbmmap,
.d_kqfilter = nokqfilter,
.d_discard = nodiscard,
.d_flag = 0
};
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(struct fbdevice *fb, int newpri)
{
if (fbpriority < newpri) {
fbpriority = newpri;
devfb = fb;
}
}
int
fbopen(dev_t dev, int flags, int mode, struct lwp *l)
{
if (devfb == NULL)
return (ENXIO);
return ((*devfb->fb_driver->fbd_open)(dev, flags, mode, l));
}
int
fbclose(dev_t dev, int flags, int mode, struct lwp *l)
{
return ((*devfb->fb_driver->fbd_close)(dev, flags, mode, l));
}
int
fbioctl(dev_t dev, u_long cmd, void *data, int flags, struct lwp *l)
{
return (fbioctlfb(devfb, cmd, data));
}
paddr_t
fbmmap(dev_t dev, off_t off, int prot)
{
return ((*devfb->fb_driver->fbd_mmap)(dev, off, prot));
}
/*
* Common fb ioctl function
*/
int
fbioctlfb(struct fbdevice *fb, u_long cmd, void *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(void)
{
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(struct fbdevice *fbd, void *vp)
{
return ENOTTY;
}
/****************************************************************
* Misc. helpers...
*/
/* Set FB size based on EEPROM screen shape code. */
void
fb_eeprom_setsize(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(void *va)
{
volatile uint32_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(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(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(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);
}
}
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