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NetBSD/sys/arch/sparc/dev/cgsix.c

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/*
* Copyright (c) 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.
*
* %W% (Berkeley) %G%
*
* from: Header: cgsix.c,v 1.2 93/10/18 00:01:51 torek Exp
* $Id: cgsix.c,v 1.1 1993/11/11 03:36:52 deraadt Exp $
*/
/*
* color display (cgsix) driver.
*
* Does not handle interrupts, even though they can occur.
*
* XXX should defer colormap updates to vertical retrace interrupts
*/
#include <sys/param.h>
#include <sys/buf.h>
#include <sys/device.h>
#include <sys/fbio.h>
#include <sys/ioctl.h>
#include <sys/malloc.h>
#include <sys/mman.h>
#include <sys/tty.h>
#ifdef DEBUG
#include <sys/proc.h>
#include <sys/syslog.h>
#endif
#include <machine/autoconf.h>
#include <machine/pmap.h>
#include <machine/fbvar.h>
#include <sparc/sbus/btreg.h>
#include <sparc/sbus/btvar.h>
#include <sparc/sbus/cgsixreg.h>
#include <sparc/sbus/sbusvar.h>
union cursor_cmap { /* colormap, like bt_cmap, but tiny */
u_char cm_map[2][3]; /* 2 R/G/B entries */
u_int cm_chip[2]; /* 2 chip equivalents */
};
struct cg6_cursor { /* cg6 hardware cursor status */
short cc_enable; /* cursor is enabled */
struct fbcurpos cc_pos; /* position */
struct fbcurpos cc_hot; /* hot-spot */
struct fbcurpos cc_size; /* size of mask & image fields */
u_int cc_bits[2][32]; /* space for mask & image bits */
union cursor_cmap cc_color; /* cursor colormap */
};
/* per-display variables */
struct cgsix_softc {
struct device sc_dev; /* base device */
struct sbusdev sc_sd; /* sbus device */
struct fbdevice sc_fb; /* frame buffer device */
volatile struct cg6_layout *sc_physadr; /* phys addr of h/w */
volatile struct bt_regs *sc_bt; /* Brooktree registers */
volatile struct cg6_thc *sc_thc; /* THC registers */
int sc_blanked; /* true if blanked */
struct cg6_cursor sc_cursor; /* software cursor info */
union bt_cmap sc_cmap; /* Brooktree color map */
};
/* autoconfiguration driver */
static void cgsixattach(struct device *, struct device *, void *);
struct cfdriver cgsixcd =
{ NULL, "cgsix", matchbyname, cgsixattach,
DV_DULL, sizeof(struct cgsix_softc) };
/* frame buffer generic driver */
static void cg6_unblank(struct device *);
static struct fbdriver cg6_fbdriver = { cg6_unblank };
/*
* Unlike the bw2 and cg3 drivers, we do not need to provide an rconsole
* interface, as the cg6 is fast enough.
*/
extern int fbnode;
#define CGSIX_MAJOR 67 /* XXX */
static void cg6_loadcmap __P((struct cgsix_softc *, int, int));
static void cg6_loadomap __P((struct cgsix_softc *));
static void cg6_setcursor __P((struct cgsix_softc *));/* set position */
static void cg6_loadcursor __P((struct cgsix_softc *));/* set shape */
/*
* Attach a display.
*/
void
cgsixattach(parent, self, args)
struct device *parent, *self;
void *args;
{
register struct cgsix_softc *sc = (struct cgsix_softc *)self;
register struct sbus_attach_args *sa = args;
register int node = sa->sa_ra.ra_node, ramsize, i;
register volatile struct bt_regs *bt;
register volatile struct cg6_layout *p;
sc->sc_fb.fb_major = CGSIX_MAJOR; /* XXX to be removed */
sc->sc_fb.fb_driver = &cg6_fbdriver;
sc->sc_fb.fb_device = &sc->sc_dev;
sc->sc_fb.fb_type.fb_type = FBTYPE_SUNFAST_COLOR;
sc->sc_fb.fb_type.fb_width = getpropint(node, "width", 1152);
sc->sc_fb.fb_type.fb_height = getpropint(node, "height", 900);
sc->sc_fb.fb_linebytes = getpropint(node, "linebytes", 1152);
ramsize = sc->sc_fb.fb_type.fb_height * sc->sc_fb.fb_linebytes;
sc->sc_fb.fb_type.fb_depth = 8;
sc->sc_fb.fb_type.fb_cmsize = 256;
sc->sc_fb.fb_type.fb_size = ramsize;
printf(": %s, %d x %d", getpropstring(node, "model"),
sc->sc_fb.fb_type.fb_width, sc->sc_fb.fb_type.fb_height);
/*
* Dunno what the PROM has mapped, though obviously it must have
* the video RAM mapped. Just map what we care about for ourselves
* (the THC and Brooktree registers).
*/
sc->sc_physadr = p = (struct cg6_layout *)sa->sa_ra.ra_paddr;
sc->sc_bt = bt = (volatile struct bt_regs *)
mapiodev((caddr_t)&p->cg6_bt_un.un_btregs, sizeof(struct bt_regs));
sc->sc_thc = (volatile struct cg6_thc *)
mapiodev((caddr_t)&p->cg6_thc_un.un_thc, sizeof(struct cg6_thc));
/* grab initial (current) color map (DOES THIS WORK?) */
bt->bt_addr = 0;
for (i = 0; i < 256 * 3; i++)
((char *)&sc->sc_cmap)[i] = bt->bt_cmap >> 24;
/* enable video */
sc->sc_thc->thc_misc |= THC_MISC_VIDEN;
printf("\n");
sbus_establish(&sc->sc_sd, &sc->sc_dev);
if (node == fbnode)
fb_attach(&sc->sc_fb);
}
int
cgsixopen(dev, flags, mode, p)
dev_t dev;
int flags, mode;
struct proc *p;
{
int unit = minor(dev);
if (unit >= cgsixcd.cd_ndevs || cgsixcd.cd_devs[unit] == NULL)
return (ENXIO);
return (0);
}
int
cgsixclose(dev, flags, mode, p)
dev_t dev;
int flags, mode;
struct proc *p;
{
return (0);
}
int
cgsixioctl(dev, cmd, data, flags, p)
dev_t dev;
int cmd;
register caddr_t data;
int flags;
struct proc *p;
{
register struct cgsix_softc *sc = cgsixcd.cd_devs[minor(dev)];
u_int count;
int i, v, error;
union cursor_cmap tcm;
switch (cmd) {
case FBIOGTYPE:
*(struct fbtype *)data = sc->sc_fb.fb_type;
break;
case FBIOGATTR:
#define fba ((struct fbgattr *)data)
fba->real_type = sc->sc_fb.fb_type.fb_type;
fba->owner = 0; /* XXX ??? */
fba->fbtype = sc->sc_fb.fb_type;
fba->sattr.flags = 0;
fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type;
fba->sattr.dev_specific[0] = -1;
fba->emu_types[0] = sc->sc_fb.fb_type.fb_type;
fba->emu_types[1] = -1;
#undef fba
break;
case FBIOGETCMAP:
return (bt_getcmap((struct fbcmap *)data, &sc->sc_cmap, 256));
case FBIOPUTCMAP:
/* copy to software map */
#define p ((struct fbcmap *)data)
error = bt_putcmap(p, &sc->sc_cmap, 256);
if (error)
return (error);
/* now blast them into the chip */
/* XXX should use retrace interrupt */
cg6_loadcmap(sc, p->index, p->count);
#undef p
break;
case FBIOGVIDEO:
*(int *)data = sc->sc_blanked;
break;
case FBIOSVIDEO:
if (*(int *)data)
cg6_unblank(&sc->sc_dev);
else if (!sc->sc_blanked) {
sc->sc_blanked = 1;
sc->sc_thc->thc_misc &= ~THC_MISC_VIDEN;
}
break;
/* these are for both FBIOSCURSOR and FBIOGCURSOR */
#define p ((struct fbcursor *)data)
#define cc (&sc->sc_cursor)
case FBIOGCURSOR:
/* do not quite want everything here... */
p->set = FB_CUR_SETALL; /* close enough, anyway */
p->enable = cc->cc_enable;
p->pos = cc->cc_pos;
p->hot = cc->cc_hot;
p->size = cc->cc_size;
/* begin ugh ... can we lose some of this crap?? */
if (p->image != NULL) {
count = cc->cc_size.y * 32 / NBBY;
error = copyout((caddr_t)cc->cc_bits[1],
(caddr_t)p->image, count);
if (error)
return (error);
error = copyout((caddr_t)cc->cc_bits[0],
(caddr_t)p->mask, count);
if (error)
return (error);
}
if (p->cmap.red != NULL) {
error = bt_getcmap(&p->cmap,
(union bt_cmap *)&cc->cc_color, 2);
if (error)
return (error);
} else {
p->cmap.index = 0;
p->cmap.count = 2;
}
/* end ugh */
break;
case FBIOSCURSOR:
/*
* For setcmap and setshape, verify parameters, so that
* we do not get halfway through an update and then crap
* out with the software state screwed up.
*/
v = p->set;
if (v & FB_CUR_SETCMAP) {
/*
* This use of a temporary copy of the cursor
* colormap is not terribly efficient, but these
* copies are small (8 bytes)...
*/
tcm = cc->cc_color;
error = bt_putcmap(&p->cmap, (union bt_cmap *)&tcm, 2);
if (error)
return (error);
}
if (v & FB_CUR_SETSHAPE) {
if ((u_int)p->size.x > 32 || (u_int)p->size.y > 32)
return (EINVAL);
count = p->size.y * 32 / NBBY;
if (!useracc(p->image, count, B_READ) ||
!useracc(p->mask, count, B_READ))
return (EFAULT);
}
/* parameters are OK; do it */
if (v & (FB_CUR_SETCUR | FB_CUR_SETPOS | FB_CUR_SETHOT)) {
if (v & FB_CUR_SETCUR)
cc->cc_enable = p->enable;
if (v & FB_CUR_SETPOS)
cc->cc_pos = p->pos;
if (v & FB_CUR_SETHOT)
cc->cc_hot = p->hot;
cg6_setcursor(sc);
}
if (v & FB_CUR_SETCMAP) {
cc->cc_color = tcm;
cg6_loadomap(sc); /* XXX defer to vertical retrace */
}
if (v & FB_CUR_SETSHAPE) {
cc->cc_size = p->size;
count = p->size.y * 32 / NBBY;
bzero((caddr_t)cc->cc_bits, sizeof cc->cc_bits);
bcopy(p->mask, (caddr_t)cc->cc_bits[0], count);
bcopy(p->image, (caddr_t)cc->cc_bits[1], count);
cg6_loadcursor(sc);
}
break;
#undef p
#undef cc
case FBIOGCURPOS:
*(struct fbcurpos *)data = sc->sc_cursor.cc_pos;
break;
case FBIOSCURPOS:
sc->sc_cursor.cc_pos = *(struct fbcurpos *)data;
cg6_setcursor(sc);
break;
case FBIOGCURMAX:
/* max cursor size is 32x32 */
((struct fbcurpos *)data)->x = 32;
((struct fbcurpos *)data)->y = 32;
break;
default:
#ifdef DEBUG
log(LOG_NOTICE, "cgsixioctl(%x) (%s[%d])\n", cmd,
p->p_comm, p->p_pid);
#endif
return (ENOTTY);
}
return (0);
}
static void
cg6_setcursor(sc)
register struct cgsix_softc *sc;
{
/* we need to subtract the hot-spot value here */
#define COORD(f) (sc->sc_cursor.cc_pos.f - sc->sc_cursor.cc_hot.f)
sc->sc_thc->thc_cursxy = sc->sc_cursor.cc_enable ?
((COORD(x) << 16) | (COORD(y) & 0xffff)) :
(THC_CURSOFF << 16) | THC_CURSOFF;
#undef COORD
}
static void
cg6_loadcursor(sc)
register struct cgsix_softc *sc;
{
register volatile struct cg6_thc *thc;
register u_int edgemask, m;
register int i;
/*
* Keep the top size.x bits. Here we *throw out* the top
* size.x bits from an all-one-bits word, introducing zeros in
* the top size.x bits, then invert all the bits to get what
* we really wanted as our mask. But this fails if size.x is
* 32---a sparc uses only the low 5 bits of the shift count---
* so we have to special case that.
*/
edgemask = ~0;
if (sc->sc_cursor.cc_size.x < 32)
edgemask = ~(edgemask >> sc->sc_cursor.cc_size.x);
thc = sc->sc_thc;
for (i = 0; i < 32; i++) {
m = sc->sc_cursor.cc_bits[0][i] & edgemask;
thc->thc_cursmask[i] = m;
thc->thc_cursbits[i] = m & sc->sc_cursor.cc_bits[1][i];
}
}
/*
* Load a subset of the current (new) colormap into the color DAC.
*/
static void
cg6_loadcmap(sc, start, ncolors)
register struct cgsix_softc *sc;
register int start, ncolors;
{
register volatile struct bt_regs *bt;
register u_int *ip, i;
register int count;
ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */
count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3;
bt = sc->sc_bt;
bt->bt_addr = BT_D4M4(start) << 24;
while (--count >= 0) {
i = *ip++;
/* hardware that makes one want to pound boards with hammers */
bt->bt_cmap = i;
bt->bt_cmap = i << 8;
bt->bt_cmap = i << 16;
bt->bt_cmap = i << 24;
}
}
/*
* Load the cursor (overlay `foreground' and `background') colors.
*/
static void
cg6_loadomap(sc)
register struct cgsix_softc *sc;
{
register volatile struct bt_regs *bt;
register u_int i;
bt = sc->sc_bt;
bt->bt_addr = 0x01 << 24; /* set background color */
i = sc->sc_cursor.cc_color.cm_chip[0];
bt->bt_omap = i; /* R */
bt->bt_omap = i << 8; /* G */
bt->bt_omap = i << 16; /* B */
bt->bt_addr = 0x03 << 24; /* set foreground color */
bt->bt_omap = i << 24; /* R */
i = sc->sc_cursor.cc_color.cm_chip[1];
bt->bt_omap = i; /* G */
bt->bt_omap = i << 8; /* B */
}
static void
cg6_unblank(dev)
struct device *dev;
{
struct cgsix_softc *sc = (struct cgsix_softc *)dev;
if (sc->sc_blanked) {
sc->sc_blanked = 0;
sc->sc_thc->thc_misc |= THC_MISC_VIDEN;
}
}
/* XXX the following should be moved to a "user interface" header */
/*
* Base addresses at which users can mmap() the various pieces of a cg6.
* Note that although the Brooktree color registers do not occupy 8K,
* the X server dies if we do not allow it to map 8K there (it just maps
* from 0x70000000 forwards, as a contiguous chunk).
*/
#define CG6_USER_FBC 0x70000000
#define CG6_USER_TEC 0x70001000
#define CG6_USER_BTREGS 0x70002000
#define CG6_USER_FHC 0x70004000
#define CG6_USER_THC 0x70005000
#define CG6_USER_ROM 0x70006000
#define CG6_USER_RAM 0x70016000
#define CG6_USER_DHC 0x80000000
struct mmo {
u_int mo_uaddr; /* user (virtual) address */
u_int mo_size; /* size, or 0 for video ram size */
u_int mo_physoff; /* offset from sc_physadr */
};
/*
* Return the address that would map the given device at the given
* offset, allowing for the given protection, or return -1 for error.
*
* XXX needs testing against `demanding' applications (e.g., aviator)
*/
int
cgsixmap(dev, off, prot)
dev_t dev;
int off, prot;
{
register struct cgsix_softc *sc = cgsixcd.cd_devs[minor(dev)];
register struct mmo *mo;
register u_int u, sz;
#define O(memb) ((u_int)(&((struct cg6_layout *)0)->memb))
static struct mmo mmo[] = {
{ CG6_USER_RAM, 0, O(cg6_ram) },
/* do not actually know how big most of these are! */
{ CG6_USER_FBC, 1, O(cg6_fbc_un) },
{ CG6_USER_TEC, 1, O(cg6_tec_un) },
{ CG6_USER_BTREGS, 8192 /* XXX */, O(cg6_bt_un) },
{ CG6_USER_FHC, 1, O(cg6_fhc_un) },
{ CG6_USER_THC, sizeof(struct cg6_thc), O(cg6_thc_un) },
{ CG6_USER_ROM, 65536, O(cg6_rom_un) },
{ CG6_USER_DHC, 1, O(cg6_dhc_un) },
};
#define NMMO (sizeof mmo / sizeof *mmo)
if (off & PGOFSET)
panic("cgsixmap");
/*
* Entries with size 0 map video RAM (i.e., the size in fb data).
*
* Since we work in pages, the fact that the map offset table's
* sizes are sometimes bizarre (e.g., 1) is effectively ignored:
* one byte is as good as one page.
*/
for (mo = mmo; mo < &mmo[NMMO]; mo++) {
if ((u_int)off < mo->mo_uaddr)
continue;
u = off - mo->mo_uaddr;
sz = mo->mo_size ? mo->mo_size : sc->sc_fb.fb_type.fb_size;
if (u < sz)
return ((int)sc->sc_physadr + u + mo->mo_physoff +
PMAP_OBIO + PMAP_NC);
}
#ifdef DEBUG
{
register struct proc *p = curproc; /* XXX */
log(LOG_NOTICE, "cgsixmap(%x) (%s[%d])\n", off, p->p_comm, p->p_pid);
}
#endif
return (-1); /* not a user-map offset */
}
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