328 lines
7.0 KiB
C
328 lines
7.0 KiB
C
/* $NetBSD: fb.c,v 1.16 2014/07/25 08:10:35 dholland Exp $ */
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Lawrence Berkeley Laboratory.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)fb.c 8.1 (Berkeley) 6/11/93
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*/
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/*
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* /dev/fb (indirect frame buffer driver).
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: fb.c,v 1.16 2014/07/25 08:10:35 dholland Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/device.h>
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#include <sys/ioctl.h>
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#include <sys/proc.h>
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#include <machine/eeprom.h>
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#include <dev/sun/fbio.h>
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#include <sun3/dev/fbvar.h>
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#include <sun3/dev/p4reg.h>
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dev_type_open(fbopen);
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dev_type_close(fbclose);
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dev_type_ioctl(fbioctl);
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dev_type_mmap(fbmmap);
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const struct cdevsw fb_cdevsw = {
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.d_open = fbopen,
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.d_close = fbclose,
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.d_read = noread,
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.d_write = nowrite,
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.d_ioctl = fbioctl,
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.d_stop = nostop,
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.d_tty = notty,
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.d_poll = nopoll,
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.d_mmap = fbmmap,
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.d_kqfilter = nokqfilter,
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.d_discard = nodiscard,
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.d_flag = 0
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};
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static struct fbdevice *devfb;
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static int fbpriority;
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/*
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* This is called by the real driver (i.e. bw2, cg3, ...)
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* to declare itself as a potential default frame buffer.
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*/
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void
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fb_attach(struct fbdevice *fb, int newpri)
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{
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if (fbpriority < newpri) {
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fbpriority = newpri;
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devfb = fb;
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}
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}
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int
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fbopen(dev_t dev, int flags, int mode, struct lwp *l)
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{
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if (devfb == NULL)
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return (ENXIO);
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return ((*devfb->fb_driver->fbd_open)(dev, flags, mode, l));
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}
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int
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fbclose(dev_t dev, int flags, int mode, struct lwp *l)
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{
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return ((*devfb->fb_driver->fbd_close)(dev, flags, mode, l));
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}
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int
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fbioctl(dev_t dev, u_long cmd, void *data, int flags, struct lwp *l)
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{
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return (fbioctlfb(devfb, cmd, data));
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}
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paddr_t
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fbmmap(dev_t dev, off_t off, int prot)
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{
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return ((*devfb->fb_driver->fbd_mmap)(dev, off, prot));
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}
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/*
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* Common fb ioctl function
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*/
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int
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fbioctlfb(struct fbdevice *fb, u_long cmd, void *data)
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{
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struct fbdriver *fbd = fb->fb_driver;
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void *vp = (void *)data;
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int error;
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switch (cmd) {
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case FBIOGTYPE:
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*(struct fbtype *)vp = fb->fb_fbtype;
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error = 0;
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break;
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case FBIOGATTR:
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error = (*fbd->fbd_gattr)(fb, vp);
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break;
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case FBIOGVIDEO:
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error = (*fbd->fbd_gvideo)(fb, vp);
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break;
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case FBIOSVIDEO:
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error = (*fbd->fbd_svideo)(fb, vp);
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break;
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case FBIOGETCMAP:
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error = (*fbd->fbd_getcmap)(fb, vp);
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break;
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case FBIOPUTCMAP:
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error = (*fbd->fbd_putcmap)(fb, vp);
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break;
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default:
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error = ENOTTY;
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}
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return (error);
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}
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void
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fb_unblank(void)
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{
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int on = 1;
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if (devfb == NULL)
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return;
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(*devfb->fb_driver->fbd_svideo)(devfb, (void *)&on);
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}
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/*
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* Default ioctl function to put in struct fbdriver
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* for functions that are not supported.
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*/
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int
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fb_noioctl(struct fbdevice *fbd, void *vp)
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{
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return ENOTTY;
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}
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/****************************************************************
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* Misc. helpers...
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*/
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/* Set FB size based on EEPROM screen shape code. */
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void
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fb_eeprom_setsize(struct fbdevice *fb)
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{
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int szcode;
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int w, h;
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/* Go get the EEPROM screen size byte. */
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szcode = eeprom_copy->eeScreenSize;
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w = h = 0;
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switch (szcode) {
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case EE_SCR_1152X900:
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w = 1152;
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h = 900;
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break;
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case EE_SCR_1024X1024:
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w = 1024;
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h = 1024;
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break;
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case EE_SCR_1600X1280:
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w = 1600;
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h = 1280;
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break;
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case EE_SCR_1440X1440:
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w = 1440;
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h = 1440;
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break;
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default:
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break;
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}
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if (w && h) {
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fb->fb_fbtype.fb_width = w;
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fb->fb_fbtype.fb_height = h;
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} else {
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printf("%s: EE size code %d unknown\n",
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fb->fb_name, szcode);
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}
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}
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/*
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* Probe for a P4 register at the passed virtual address.
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* Returns P4 ID value, or -1 if no P4 register.
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*/
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int
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fb_pfour_id(void *va)
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{
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volatile uint32_t val, save, *pfour = va;
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/* Read the P4 register. */
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save = *pfour;
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/*
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* Try to modify the type code. If it changes, put the
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* original value back, and tell the caller that the
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* framebuffer does not have a P4 register.
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*/
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val = save & ~P4_REG_RESET;
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*pfour = (val ^ P4_FBTYPE_MASK);
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if ((*pfour ^ val) & P4_FBTYPE_MASK) {
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*pfour = save;
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return (-1);
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}
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return (P4_ID(val));
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}
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/*
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* Return the status of the video enable.
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*/
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int
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fb_pfour_get_video(struct fbdevice *fb)
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{
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return ((*fb->fb_pfour & P4_REG_VIDEO) != 0);
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}
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/*
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* Turn video on or off using the P4 register.
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*/
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void
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fb_pfour_set_video(struct fbdevice *fb, int on)
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{
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int pfour;
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pfour = *fb->fb_pfour & ~(P4_REG_INTCLR|P4_REG_VIDEO);
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*fb->fb_pfour = pfour | (on ? P4_REG_VIDEO : 0);
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}
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static const struct {
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int w, h;
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} fb_p4sizedecode[P4_SIZE_MASK+1] = {
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{ 1600, 1280 },
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{ 1152, 900 },
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{ 1024, 1024 },
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{ 1280, 1024 },
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{ 1440, 1440 },
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{ 640, 480 },
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};
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/*
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* Use the P4 register to determine the screen size.
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*/
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void
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fb_pfour_setsize(struct fbdevice *fb)
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{
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int p4, p4type, p4size;
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int h, w;
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if (fb->fb_pfour == 0)
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return;
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p4 = *fb->fb_pfour;
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p4type = P4_FBTYPE(p4);
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/* These do not encode the screen size. */
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if (p4type == P4_ID_COLOR24)
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return;
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if ((p4type & P4_ID_MASK) == P4_ID_FASTCOLOR)
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return;
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p4size = p4type & P4_SIZE_MASK;
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w = fb_p4sizedecode[p4size].w;
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h = fb_p4sizedecode[p4size].h;
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if (w && h) {
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fb->fb_fbtype.fb_width = w;
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fb->fb_fbtype.fb_height = h;
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} else {
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printf("%s: P4 size code %d unknown\n",
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fb->fb_name, p4size);
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}
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}
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