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

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/* $NetBSD: cgfourteen.c,v 1.48 2007/03/04 06:00:43 christos Exp $ */
/*
* Copyright (c) 1996
* The President and Fellows of Harvard College. All rights reserved.
* 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 Harvard University.
* 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.
* This product includes software developed by Harvard University 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.
*
* Based on:
* NetBSD: cgthree.c,v 1.28 1996/05/31 09:59:22 pk Exp
* NetBSD: cgsix.c,v 1.25 1996/04/01 17:30:00 christos Exp
*/
/*
* Driver for Campus-II on-board mbus-based video (cgfourteen).
* Provides minimum emulation of a Sun cgthree 8-bit framebuffer to
* allow X to run.
*
* Does not handle interrupts, even though they can occur.
*
* XXX should defer colormap updates to vertical retrace interrupts
*/
/*
* The following is for debugging only; it opens up a security hole
* enabled by allowing any user to map the control registers for the
* cg14 into their space.
*/
#undef CG14_MAP_REGS
/*
* The following enables 24-bit operation: when opened, the framebuffer
* will switch to 24-bit mode (actually 32-bit mode), and provide a
* simple cg8 emulation.
*/
#define CG14_CG8
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/malloc.h>
#include <sys/mman.h>
#include <sys/tty.h>
#include <sys/conf.h>
#include <uvm/uvm_extern.h>
#include <dev/sun/fbio.h>
#include <machine/autoconf.h>
#include <machine/pmap.h>
#include <dev/sun/fbvar.h>
#include <machine/cpu.h>
#include <dev/sbus/sbusvar.h>
#include <sparc/dev/cgfourteenreg.h>
#include <sparc/dev/cgfourteenvar.h>
/* autoconfiguration driver */
static int cgfourteenmatch(struct device *, struct cfdata *, void *);
static void cgfourteenattach(struct device *, struct device *, void *);
static void cgfourteenunblank(struct device *);
CFATTACH_DECL(cgfourteen, sizeof(struct cgfourteen_softc),
cgfourteenmatch, cgfourteenattach, NULL, NULL);
extern struct cfdriver cgfourteen_cd;
dev_type_open(cgfourteenopen);
dev_type_close(cgfourteenclose);
dev_type_ioctl(cgfourteenioctl);
dev_type_mmap(cgfourteenmmap);
dev_type_poll(cgfourteenpoll);
const struct cdevsw cgfourteen_cdevsw = {
cgfourteenopen, cgfourteenclose, noread, nowrite, cgfourteenioctl,
nostop, notty, cgfourteenpoll, cgfourteenmmap, nokqfilter,
};
/* frame buffer generic driver */
static struct fbdriver cgfourteenfbdriver = {
cgfourteenunblank, cgfourteenopen, cgfourteenclose, cgfourteenioctl,
cgfourteenpoll, cgfourteenmmap, nokqfilter
};
extern struct tty *fbconstty;
static void cg14_set_video(struct cgfourteen_softc *, int);
static int cg14_get_video(struct cgfourteen_softc *);
static int cg14_get_cmap(struct fbcmap *, union cg14cmap *, int);
static int cg14_put_cmap(struct fbcmap *, union cg14cmap *, int);
static void cg14_load_hwcmap(struct cgfourteen_softc *, int, int);
static void cg14_init(struct cgfourteen_softc *);
static void cg14_reset(struct cgfourteen_softc *);
/*
* Match a cgfourteen.
*/
int
cgfourteenmatch(struct device *parent, struct cfdata *cf, void *aux)
{
union obio_attach_args *uoba = aux;
struct sbus_attach_args *sa = &uoba->uoba_sbus;
/*
* The cgfourteen is a local-bus video adaptor, accessed directly
* via the processor, and not through device space or an external
* bus. Thus we look _only_ at the obio bus.
* Additionally, these things exist only on the Sun4m.
*/
if (uoba->uoba_isobio4 != 0 || !CPU_ISSUN4M)
return (0);
/* Check driver name */
return (strcmp(cf->cf_name, sa->sa_name) == 0);
}
/*
* Set COLOUR_OFFSET to the offset of the video RAM. This is to provide
* space for faked overlay junk for the cg8 emulation.
*
* As it happens, this value is correct for both cg3 and cg8 emulation!
*/
#define COLOUR_OFFSET (256*1024)
#ifdef RASTERCONSOLE
static void cg14_set_rcons_luts(struct cgfourteen_softc *sc)
{
int i;
for (i=0;i<CG14_CLUT_SIZE;i++) sc->sc_xlut->xlut_lut[i] = 0x22;
for (i=0;i<CG14_CLUT_SIZE;i++) sc->sc_clut2->clut_lut[i] = 0x00ffffff;
sc->sc_clut2->clut_lut[0] = 0x00ffffff;
sc->sc_clut2->clut_lut[255] = 0;
}
#endif /* RASTERCONSOLE */
/*
* Attach a display. We need to notice if it is the console, too.
*/
void
cgfourteenattach(struct device *parent, struct device *self, void *aux)
{
union obio_attach_args *uoba = aux;
struct sbus_attach_args *sa = &uoba->uoba_sbus;
struct cgfourteen_softc *sc = (struct cgfourteen_softc *)self;
struct fbdevice *fb = &sc->sc_fb;
bus_space_handle_t bh;
int node, ramsize;
volatile uint32_t *lut;
int i, isconsole;
node = sa->sa_node;
/* Remember cookies for cgfourteenmmap() */
sc->sc_bustag = sa->sa_bustag;
fb->fb_driver = &cgfourteenfbdriver;
fb->fb_device = &sc->sc_dev;
/* Mask out invalid flags from the user. */
fb->fb_flags = device_cfdata(&sc->sc_dev)->cf_flags & FB_USERMASK;
/*
* We're emulating a cg3/8, so represent ourselves as one
*/
#ifdef CG14_CG8
fb->fb_type.fb_type = FBTYPE_MEMCOLOR;
fb->fb_type.fb_depth = 32;
fb_setsize_obp(fb, sc->sc_fb.fb_type.fb_depth, 1152, 900, node);
ramsize = roundup(fb->fb_type.fb_height * 1152 * 4, NBPG);
#else
fb->fb_type.fb_type = FBTYPE_SUN3COLOR;
fb->fb_type.fb_depth = 8;
fb_setsize_obp(fb, sc->sc_fb.fb_type.fb_depth, 1152, 900, node);
ramsize = roundup(fb->fb_type.fb_height * fb->fb_linebytes, NBPG);
#endif
fb->fb_type.fb_cmsize = CG14_CLUT_SIZE;
fb->fb_type.fb_size = ramsize + COLOUR_OFFSET;
if (sa->sa_nreg < 2) {
printf("%s: only %d register sets\n",
self->dv_xname, sa->sa_nreg);
return;
}
bcopy(sa->sa_reg, sc->sc_physadr,
sa->sa_nreg * sizeof(struct sbus_reg));
/*
* Now map in the 8 useful pages of registers
*/
if (sa->sa_size < 0x10000) {
#ifdef DIAGNOSTIC
printf("warning: can't find all cgfourteen registers...\n");
#endif
sa->sa_size = 0x10000;
}
if (sbus_bus_map(sa->sa_bustag, sa->sa_slot,
sa->sa_offset,
sa->sa_size,
BUS_SPACE_MAP_LINEAR,
&bh) != 0) {
printf("%s: cannot map control registers\n", self->dv_xname);
return;
}
sc->sc_ctl = (struct cg14ctl *) (bh);
sc->sc_hwc = (struct cg14curs *) (bh + CG14_OFFSET_CURS);
sc->sc_dac = (struct cg14dac *) (bh + CG14_OFFSET_DAC);
sc->sc_xlut = (struct cg14xlut *) (bh + CG14_OFFSET_XLUT);
sc->sc_clut1 = (struct cg14clut *) (bh + CG14_OFFSET_CLUT1);
sc->sc_clut2 = (struct cg14clut *) (bh + CG14_OFFSET_CLUT2);
sc->sc_clut3 = (struct cg14clut *) (bh + CG14_OFFSET_CLUT3);
sc->sc_clutincr = (u_int *) (bh + CG14_OFFSET_CLUTINCR);
/*
* Let the user know that we're here
*/
#ifdef CG14_CG8
printf(": cgeight emulated at %dx%dx24bpp",
fb->fb_type.fb_width, fb->fb_type.fb_height);
#else
printf(": cgthree emulated at %dx%dx8bpp",
fb->fb_type.fb_width, fb->fb_type.fb_height);
#endif
/*
* Enable the video.
*/
cg14_set_video(sc, 1);
/*
* Grab the initial colormap
*/
lut = sc->sc_clut1->clut_lut;
for (i = 0; i < CG14_CLUT_SIZE; i++)
sc->sc_cmap.cm_chip[i] = lut[i];
/* See if we're the console */
isconsole = fb_is_console(node);
if (isconsole) {
printf(" (console)\n");
#ifdef RASTERCONSOLE
/* *sbus*_bus_map? but that's how we map the regs... */
if (sbus_bus_map( sc->sc_bustag,
sc->sc_physadr[CG14_PXL_IDX].sbr_slot,
sc->sc_physadr[CG14_PXL_IDX].sbr_offset+0x03800000,
1152*900, BUS_SPACE_MAP_LINEAR,
&bh) != 0) {
printf("%s: cannot map pixels\n",&sc->sc_dev.dv_xname[0]);
} else {
sc->sc_rcfb = sc->sc_fb;
sc->sc_rcfb.fb_type.fb_type = FBTYPE_SUN3COLOR;
sc->sc_rcfb.fb_type.fb_depth = 8;
sc->sc_rcfb.fb_linebytes = 1152;
sc->sc_rcfb.fb_type.fb_size = roundup(1152*900,NBPG);
sc->sc_rcfb.fb_pixels = (void *)bh;
printf("vram at %p\n",(void *)bh);
for (i=0;i<1152*900;i++) ((unsigned char *)bh)[i] = 0;
fbrcons_init(&sc->sc_rcfb);
cg14_set_rcons_luts(sc);
sc->sc_ctl->ctl_mctl = CG14_MCTL_ENABLEVID | CG14_MCTL_PIXMODE_32 | CG14_MCTL_POWERCTL;
}
#endif
} else
printf("\n");
/* Attach to /dev/fb */
fb_attach(&sc->sc_fb, isconsole);
}
/*
* Keep track of the number of opens made. In the 24-bit driver, we need to
* switch to 24-bit mode on the first open, and switch back to 8-bit on
* the last close. This kind of nonsense is needed to give screenblank
* a fighting chance of working.
*/
static int cg14_opens = 0;
int
cgfourteenopen(dev_t dev, int flags, int mode, struct lwp *l)
{
struct cgfourteen_softc *sc;
int unit;
int s, oldopens;
unit = minor(dev);
if (unit >= cgfourteen_cd.cd_ndevs)
return(ENXIO);
sc = cgfourteen_cd.cd_devs[minor(dev)];
if (sc == NULL)
return(ENXIO);
s = splhigh();
oldopens = cg14_opens++;
splx(s);
/* Setup the cg14 as we want it, and save the original PROM state */
if (oldopens == 0) /* first open only, to make screenblank work */
cg14_init(sc);
return (0);
}
int
cgfourteenclose(dev_t dev, int flags, int mode, struct lwp *l)
{
struct cgfourteen_softc *sc = cgfourteen_cd.cd_devs[minor(dev)];
int s, opens;
s = splhigh();
opens = --cg14_opens;
if (cg14_opens < 0)
opens = cg14_opens = 0;
splx(s);
/*
* Restore video state to make the PROM happy, on last close.
*/
if (opens == 0)
cg14_reset(sc);
return (0);
}
int
cgfourteenioctl(dev_t dev, u_long cmd, void *data, int flags, struct lwp *l)
{
struct cgfourteen_softc *sc = cgfourteen_cd.cd_devs[minor(dev)];
struct fbgattr *fba;
int error;
switch (cmd) {
case FBIOGTYPE:
*(struct fbtype *)data = sc->sc_fb.fb_type;
break;
case FBIOGATTR:
fba = (struct fbgattr *)data;
fba->real_type = FBTYPE_MDICOLOR;
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;
break;
case FBIOGETCMAP:
return(cg14_get_cmap((struct fbcmap *)data, &sc->sc_cmap,
CG14_CLUT_SIZE));
case FBIOPUTCMAP:
/* copy to software map */
#define p ((struct fbcmap *)data)
#ifdef CG14_CG8
p->index &= 0xffffff;
#endif
error = cg14_put_cmap(p, &sc->sc_cmap, CG14_CLUT_SIZE);
if (error)
return (error);
/* now blast them into the chip */
/* XXX should use retrace interrupt */
cg14_load_hwcmap(sc, p->index, p->count);
#undef p
break;
case FBIOGVIDEO:
*(int *)data = cg14_get_video(sc);
break;
case FBIOSVIDEO:
cg14_set_video(sc, *(int *)data);
break;
default:
return (ENOTTY);
}
return (0);
}
/*
* Undo the effect of an FBIOSVIDEO that turns the video off.
*/
static void
cgfourteenunblank(struct device *dev)
{
cg14_set_video((struct cgfourteen_softc *)dev, 1);
}
/*
* Return the address that would map the given device at the given
* offset, allowing for the given protection, or return -1 for error.
*
* Since we're pretending to be a cg8, we put the main video RAM at the
* same place the cg8 does, at offset 256k. The cg8 has an enable
* plane in the 256k space; our "enable" plane works differently. We
* can't emulate the enable plane very well, but all X uses it for is
* to clear it at startup - so we map the first page of video RAM over
* and over to fill that 256k space. We also map some other views of
* the video RAM space.
*
* Our memory map thus looks like
*
* mmap range space base offset
* 00000000-00040000 vram 0 (multi-mapped - see above)
* 00040000-00434800 vram 00000000
* 01000000-01400000 vram 01000000
* 02000000-02200000 vram 02000000
* 02800000-02a00000 vram 02800000
* 03000000-03100000 vram 03000000
* 03400000-03500000 vram 03400000
* 03800000-03900000 vram 03800000
* 03c00000-03d00000 vram 03c00000
* 10000000-10010000 regs 00000000 (only if CG14_MAP_REGS)
*/
paddr_t
cgfourteenmmap(dev_t dev, off_t off, int prot)
{
struct cgfourteen_softc *sc = cgfourteen_cd.cd_devs[minor(dev)];
if (off & PGOFSET)
panic("cgfourteenmmap");
if (off < 0)
return (-1);
#if defined(CG14_MAP_REGS) /* XXX: security hole */
/*
* Map the control registers into user space. Should only be
* used for debugging!
*/
if ((u_int)off >= 0x10000000 && (u_int)off < 0x10000000 + 16*4096) {
off -= 0x10000000;
return (bus_space_mmap(sc->sc_bustag,
BUS_ADDR(sc->sc_physadr[CG14_CTL_IDX].sbr_slot,
sc->sc_physadr[CG14_CTL_IDX].sbr_offset),
off, prot, BUS_SPACE_MAP_LINEAR));
}
#endif
if (off < COLOUR_OFFSET)
off = 0;
else if (off < COLOUR_OFFSET+(1152*900*4))
off -= COLOUR_OFFSET;
else {
switch (off >> 20) {
case 0x010: case 0x011: case 0x012: case 0x013:
case 0x020: case 0x021:
case 0x028: case 0x029:
case 0x030:
case 0x034:
case 0x038:
case 0x03c:
break;
default:
return(-1);
}
}
return (bus_space_mmap(sc->sc_bustag,
BUS_ADDR(sc->sc_physadr[CG14_PXL_IDX].sbr_slot,
sc->sc_physadr[CG14_PXL_IDX].sbr_offset),
off, prot, BUS_SPACE_MAP_LINEAR));
}
int
cgfourteenpoll(dev_t dev, int events, struct lwp *l)
{
return (seltrue(dev, events, l));
}
/*
* Miscellaneous helper functions
*/
/* Initialize the framebuffer, storing away useful state for later reset */
static void
cg14_init(struct cgfourteen_softc *sc)
{
volatile uint32_t *clut;
volatile uint8_t *xlut;
int i;
/*
* We stash away the following to restore on close:
*
* color look-up table 1 (sc->sc_saveclut)
* x look-up table (sc->sc_savexlut)
* control register (sc->sc_savectl)
* cursor control register (sc->sc_savehwc)
*/
sc->sc_savectl = sc->sc_ctl->ctl_mctl;
sc->sc_savehwc = sc->sc_hwc->curs_ctl;
clut = (volatile uint32_t *) sc->sc_clut1->clut_lut;
xlut = (volatile uint8_t *) sc->sc_xlut->xlut_lut;
for (i = 0; i < CG14_CLUT_SIZE; i++) {
sc->sc_saveclut.cm_chip[i] = clut[i];
sc->sc_savexlut[i] = xlut[i];
}
#ifdef CG14_CG8
/*
* Enable the video, and put in 24 bit mode.
*/
sc->sc_ctl->ctl_mctl = CG14_MCTL_ENABLEVID | CG14_MCTL_PIXMODE_32 |
CG14_MCTL_POWERCTL;
/*
* Zero the xlut to enable direct-color mode
*/
for (i = 0; i < CG14_CLUT_SIZE; i++)
sc->sc_xlut->xlut_lut[i] = 0;
#else
/*
* Enable the video and put it in 8 bit mode
*/
sc->sc_ctl->ctl_mctl = CG14_MCTL_ENABLEVID | CG14_MCTL_PIXMODE_8 |
CG14_MCTL_POWERCTL;
#endif
}
static void
/* Restore the state saved on cg14_init */
cg14_reset(struct cgfourteen_softc *sc)
{
volatile uint32_t *clut;
volatile uint8_t *xlut;
int i;
/*
* We restore the following, saved in cg14_init:
*
* color look-up table 1 (sc->sc_saveclut)
* x look-up table (sc->sc_savexlut)
* control register (sc->sc_savectl)
* cursor control register (sc->sc_savehwc)
*
* Note that we don't touch the video enable bits in the
* control register; otherwise, screenblank wouldn't work.
*/
sc->sc_ctl->ctl_mctl = (sc->sc_ctl->ctl_mctl & (CG14_MCTL_ENABLEVID |
CG14_MCTL_POWERCTL)) |
(sc->sc_savectl & ~(CG14_MCTL_ENABLEVID |
CG14_MCTL_POWERCTL));
sc->sc_hwc->curs_ctl = sc->sc_savehwc;
clut = sc->sc_clut1->clut_lut;
xlut = sc->sc_xlut->xlut_lut;
for (i = 0; i < CG14_CLUT_SIZE; i++) {
clut[i] = sc->sc_saveclut.cm_chip[i];
xlut[i] = sc->sc_savexlut[i];
}
}
/* Enable/disable video display; power down monitor if DPMS-capable */
static void
cg14_set_video(struct cgfourteen_softc *sc, int enable)
{
/*
* We can only use DPMS to power down the display if the chip revision
* is greater than 0.
*/
if (enable) {
if ((sc->sc_ctl->ctl_rsr & CG14_RSR_REVMASK) > 0)
sc->sc_ctl->ctl_mctl |= (CG14_MCTL_ENABLEVID |
CG14_MCTL_POWERCTL);
else
sc->sc_ctl->ctl_mctl |= CG14_MCTL_ENABLEVID;
} else {
if ((sc->sc_ctl->ctl_rsr & CG14_RSR_REVMASK) > 0)
sc->sc_ctl->ctl_mctl &= ~(CG14_MCTL_ENABLEVID |
CG14_MCTL_POWERCTL);
else
sc->sc_ctl->ctl_mctl &= ~CG14_MCTL_ENABLEVID;
}
}
/* Get status of video display */
static int
cg14_get_video(struct cgfourteen_softc *sc)
{
return ((sc->sc_ctl->ctl_mctl & CG14_MCTL_ENABLEVID) != 0);
}
/* Read the software shadow colormap */
static int
cg14_get_cmap(struct fbcmap *p, union cg14cmap *cm, int cmsize)
{
u_int i, start, count;
u_char *cp;
int error;
start = p->index;
count = p->count;
if (start >= cmsize || count > cmsize - start)
return (EINVAL);
for (cp = &cm->cm_map[start][0], i = 0; i < count; cp += 4, i++) {
error = copyout(&cp[3], &p->red[i], 1);
if (error)
return error;
error = copyout(&cp[2], &p->green[i], 1);
if (error)
return error;
error = copyout(&cp[1], &p->blue[i], 1);
if (error)
return error;
}
return (0);
}
/* Write the software shadow colormap */
static int
cg14_put_cmap(struct fbcmap *p, union cg14cmap *cm, int cmsize)
{
u_int i, start, count;
u_char *cp;
u_char cmap[256][4];
int error;
start = p->index;
count = p->count;
if (start >= cmsize || count > cmsize - start)
return (EINVAL);
memcpy(&cmap, &cm->cm_map, sizeof cmap);
for (cp = &cmap[start][0], i = 0; i < count; cp += 4, i++) {
error = copyin(&p->red[i], &cp[3], 1);
if (error)
return error;
error = copyin(&p->green[i], &cp[2], 1);
if (error)
return error;
error = copyin(&p->blue[i], &cp[1], 1);
if (error)
return error;
cp[0] = 0; /* no alpha channel */
}
memcpy(&cm->cm_map, &cmap, sizeof cmap);
return (0);
}
static void
cg14_load_hwcmap(struct cgfourteen_softc *sc, int start, int ncolors)
{
/* XXX switch to auto-increment, and on retrace intr */
/* Setup pointers to source and dest */
uint32_t *colp = &sc->sc_cmap.cm_chip[start];
volatile uint32_t *lutp = &sc->sc_clut1->clut_lut[start];
/* Copy by words */
while (--ncolors >= 0)
*lutp++ = *colp++;
}
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