* Copyright (c) 2007, 2012 Michael Lorenz

/* $NetBSD: r128fb.c,v 1.45 2022/09/25 17:52:25 thorpej Exp $ */

/*
* Copyright (c) 2007, 2012 Michael Lorenz
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/

/*
* A console driver for ATI Rage 128 graphics controllers
* tested on macppc only so far
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: r128fb.c,v 1.45 2022/09/25 17:52:25 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/lwp.h>
#include <sys/kauth.h>

#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcidevs.h>
#include <dev/pci/pciio.h>
#include <dev/pci/r128fbreg.h>

#include <dev/wscons/wsdisplayvar.h>
#include <dev/wscons/wsconsio.h>
#include <dev/wsfont/wsfont.h>
#include <dev/rasops/rasops.h>
#include <dev/wscons/wsdisplay_vconsvar.h>
#include <dev/pci/wsdisplay_pci.h>
#include <dev/wscons/wsdisplay_glyphcachevar.h>

#include "opt_r128fb.h"
#include "opt_vcons.h"

#ifdef R128FB_DEBUG
#define DPRINTF printf
#else
#define DPRINTF while(0) printf
#endif

struct r128fb_softc {
device_t sc_dev;

pci_chipset_tag_t sc_pc;
pcitag_t sc_pcitag;

bus_space_tag_t sc_memt;
bus_space_tag_t sc_iot;

bus_space_handle_t sc_regh;
bus_addr_t sc_fb, sc_reg;
bus_size_t sc_fbsize, sc_regsize;

int sc_width, sc_height, sc_depth, sc_stride;
int sc_locked, sc_have_backlight, sc_bl_level, sc_bl_on;
struct vcons_screen sc_console_screen;
struct wsscreen_descr sc_defaultscreen_descr;
const struct wsscreen_descr *sc_screens[1];
struct wsscreen_list sc_screenlist;
struct vcons_data vd;
int sc_mode;
u_char sc_cmap_red[256];
u_char sc_cmap_green[256];
u_char sc_cmap_blue[256];
/* engine stuff */
uint32_t sc_master_cntl;
glyphcache sc_gc;
};

static int r128fb_match(device_t, cfdata_t, void *);
static void r128fb_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(r128fb, sizeof(struct r128fb_softc),
r128fb_match, r128fb_attach, NULL, NULL);

static int r128fb_ioctl(void *, void *, u_long, void *, int,
struct lwp *);
static paddr_t r128fb_mmap(void *, void *, off_t, int);
static void r128fb_init_screen(void *, struct vcons_screen *, int, long *);

static int r128fb_putcmap(struct r128fb_softc *, struct wsdisplay_cmap *);
static int r128fb_getcmap(struct r128fb_softc *, struct wsdisplay_cmap *);
static void r128fb_restore_palette(struct r128fb_softc *);
static int r128fb_putpalreg(struct r128fb_softc *, uint8_t, uint8_t,
uint8_t, uint8_t);

static void r128fb_init(struct r128fb_softc *);
static void r128fb_flush_engine(struct r128fb_softc *);
static void r128fb_rectfill(struct r128fb_softc *, int, int, int, int,
uint32_t);
static void r128fb_bitblt(void *, int, int, int, int, int,
int, int);

static void r128fb_cursor(void *, int, int, int);
static void r128fb_putchar(void *, int, int, u_int, long);
static void r128fb_putchar_aa(void *, int, int, u_int, long);
static void r128fb_copycols(void *, int, int, int, int);
static void r128fb_erasecols(void *, int, int, int, long);
static void r128fb_copyrows(void *, int, int, int);
static void r128fb_eraserows(void *, int, int, long);

static void r128fb_brightness_up(device_t);
static void r128fb_brightness_down(device_t);
/* set backlight level */
static void r128fb_set_backlight(struct r128fb_softc *, int);
/* turn backlight on and off without messing with the level */
static void r128fb_switch_backlight(struct r128fb_softc *, int);

struct wsdisplay_accessops r128fb_accessops = {
r128fb_ioctl,
r128fb_mmap,
NULL, /* alloc_screen */
NULL, /* free_screen */
NULL, /* show_screen */
NULL, /* load_font */
NULL, /* pollc */
NULL /* scroll */
};

static inline void
r128fb_wait(struct r128fb_softc *sc, int slots)
{
uint32_t reg;

do {
reg = (bus_space_read_4(sc->sc_memt, sc->sc_regh,
R128_GUI_STAT) & R128_GUI_FIFOCNT_MASK);
} while (reg <= slots);
}

static void
r128fb_flush_engine(struct r128fb_softc *sc)
{
uint32_t reg;

reg = bus_space_read_4(sc->sc_memt, sc->sc_regh, R128_PC_NGUI_CTLSTAT);
reg |= R128_PC_FLUSH_ALL;
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_PC_NGUI_CTLSTAT, reg);
do {
reg = bus_space_read_4(sc->sc_memt, sc->sc_regh,
R128_PC_NGUI_CTLSTAT);
} while (reg & R128_PC_BUSY);
}

static int
r128fb_match(device_t parent, cfdata_t match, void *aux)
{
struct pci_attach_args *pa = (struct pci_attach_args *)aux;

if (PCI_CLASS(pa->pa_class) != PCI_CLASS_DISPLAY)
return 0;
if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_ATI)
return 0;

/* only cards tested on so far - likely need a list */
if ((PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_ATI_RAGE1AGP4XT) ||
(PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_ATI_RAGE3AGP4XT) ||
(PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_ATI_RAGEGLPCI) ||
(PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_ATI_RAGE_MOB_M3_AGP))
return 100;
return (0);
}

static void
r128fb_attach(device_t parent, device_t self, void *aux)
{
struct r128fb_softc *sc = device_private(self);
struct pci_attach_args *pa = aux;
struct rasops_info *ri;
bus_space_tag_t tag;
struct wsemuldisplaydev_attach_args aa;
prop_dictionary_t dict;
unsigned long defattr;
bool is_console = FALSE;
int i, j;
uint32_t reg, flags;
uint8_t cmap[768];

sc->sc_pc = pa->pa_pc;
sc->sc_pcitag = pa->pa_tag;
sc->sc_memt = pa->pa_memt;
sc->sc_iot = pa->pa_iot;
sc->sc_dev = self;

pci_aprint_devinfo(pa, NULL);

/* fill in parameters from properties */
dict = device_properties(self);
if (!prop_dictionary_get_uint32(dict, "width", &sc->sc_width)) {
aprint_error("%s: no width property\n", device_xname(self));
return;
}
if (!prop_dictionary_get_uint32(dict, "height", &sc->sc_height)) {
aprint_error("%s: no height property\n", device_xname(self));
return;
}

#ifdef GLYPHCACHE_DEBUG
/* leave some visible VRAM unused so we can see the glyph cache */
sc->sc_height -= 200;
#endif

if (!prop_dictionary_get_uint32(dict, "depth", &sc->sc_depth)) {
aprint_error("%s: no depth property\n", device_xname(self));
return;
}
if (!prop_dictionary_get_uint32(dict, "linebytes", &sc->sc_stride)) {
aprint_error("%s: no linebytes property\n",
device_xname(self));
return;
}

prop_dictionary_get_bool(dict, "is_console", &is_console);

if (pci_mapreg_info(pa->pa_pc, pa->pa_tag, 0x10, PCI_MAPREG_TYPE_MEM,
&sc->sc_fb, &sc->sc_fbsize, &flags)) {
aprint_error("%s: failed to map the frame buffer.\n",
device_xname(sc->sc_dev));
}

if (pci_mapreg_map(pa, 0x18, PCI_MAPREG_TYPE_MEM, 0,
&tag, &sc->sc_regh, &sc->sc_reg, &sc->sc_regsize)) {
aprint_error("%s: failed to map registers.\n",
device_xname(sc->sc_dev));
}

aprint_normal("%s: %d MB aperture at 0x%08x\n", device_xname(self),
(int)(sc->sc_fbsize >> 20), (uint32_t)sc->sc_fb);

sc->sc_defaultscreen_descr = (struct wsscreen_descr){
"default",
0, 0,
NULL,
8, 16,
WSSCREEN_WSCOLORS | WSSCREEN_HILIT | WSSCREEN_UNDERLINE |
WSSCREEN_RESIZE,
NULL
};
sc->sc_screens[0] = &sc->sc_defaultscreen_descr;
sc->sc_screenlist = (struct wsscreen_list){1, sc->sc_screens};
sc->sc_mode = WSDISPLAYIO_MODE_EMUL;
sc->sc_locked = 0;

vcons_init(&sc->vd, sc, &sc->sc_defaultscreen_descr,
&r128fb_accessops);
sc->vd.init_screen = r128fb_init_screen;
sc->vd.show_screen_cookie = &sc->sc_gc;
sc->vd.show_screen_cb = glyphcache_adapt;

/* init engine here */
r128fb_init(sc);

ri = &sc->sc_console_screen.scr_ri;

sc->sc_gc.gc_bitblt = r128fb_bitblt;
sc->sc_gc.gc_blitcookie = sc;
sc->sc_gc.gc_rop = R128_ROP3_S;
if (is_console) {
vcons_init_screen(&sc->vd, &sc->sc_console_screen, 1,
&defattr);
sc->sc_console_screen.scr_flags |= VCONS_SCREEN_IS_STATIC;

r128fb_rectfill(sc, 0, 0, sc->sc_width, sc->sc_height,
ri->ri_devcmap[(defattr >> 16) & 0xff]);
sc->sc_defaultscreen_descr.textops = &ri->ri_ops;
sc->sc_defaultscreen_descr.capabilities = ri->ri_caps;
sc->sc_defaultscreen_descr.nrows = ri->ri_rows;
sc->sc_defaultscreen_descr.ncols = ri->ri_cols;
glyphcache_init(&sc->sc_gc, sc->sc_height + 5,
(0x800000 / sc->sc_stride) - sc->sc_height - 5,
sc->sc_width,
ri->ri_font->fontwidth,
ri->ri_font->fontheight,
defattr);
wsdisplay_cnattach(&sc->sc_defaultscreen_descr, ri, 0, 0,
defattr);
vcons_replay_msgbuf(&sc->sc_console_screen);
} else {
/*
* since we're not the console we can postpone the rest
* until someone actually allocates a screen for us
*/
if (sc->sc_console_screen.scr_ri.ri_rows == 0) {
/* do some minimal setup to avoid weirdnesses later */
vcons_init_screen(&sc->vd, &sc->sc_console_screen, 1,
&defattr);
} else
(*ri->ri_ops.allocattr)(ri, 0, 0, 0, &defattr);
glyphcache_init(&sc->sc_gc, sc->sc_height + 5,
(0x800000 / sc->sc_stride) - sc->sc_height - 5,
sc->sc_width,
ri->ri_font->fontwidth,
ri->ri_font->fontheight,
defattr);
}

j = 0;
rasops_get_cmap(ri, cmap, sizeof(cmap));
for (i = 0; i < 256; i++) {
sc->sc_cmap_red[i] = cmap[j];
sc->sc_cmap_green[i] = cmap[j + 1];
sc->sc_cmap_blue[i] = cmap[j + 2];
r128fb_putpalreg(sc, i, cmap[j], cmap[j + 1], cmap[j + 2]);
j += 3;
}

/* no suspend/resume support yet */
if (!pmf_device_register(sc->sc_dev, NULL, NULL))
aprint_error_dev(sc->sc_dev,
"couldn't establish power handler\n");

reg = bus_space_read_4(sc->sc_memt, sc->sc_regh, R128_LVDS_GEN_CNTL);
DPRINTF("R128_LVDS_GEN_CNTL: %08x\n", reg);
if (reg & R128_LVDS_ON) {
sc->sc_have_backlight = 1;
sc->sc_bl_on = 1;
sc->sc_bl_level = 255 -
((reg & R128_LEVEL_MASK) >> R128_LEVEL_SHIFT);
pmf_event_register(sc->sc_dev, PMFE_DISPLAY_BRIGHTNESS_UP,
r128fb_brightness_up, TRUE);
pmf_event_register(sc->sc_dev, PMFE_DISPLAY_BRIGHTNESS_DOWN,
r128fb_brightness_down, TRUE);
aprint_verbose("%s: LVDS output is active, enabling backlight"
" control\n", device_xname(self));
} else
sc->sc_have_backlight = 0;

aa.console = is_console;
aa.scrdata = &sc->sc_screenlist;
aa.accessops = &r128fb_accessops;
aa.accesscookie = &sc->vd;

config_found(sc->sc_dev, &aa, wsemuldisplaydevprint, CFARGS_NONE);
}

static int
r128fb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag,
struct lwp *l)
{
struct vcons_data *vd = v;
struct r128fb_softc *sc = vd->cookie;
struct wsdisplay_fbinfo *wdf;
struct vcons_screen *ms = vd->active;
struct wsdisplay_param *param;

switch (cmd) {
case WSDISPLAYIO_GTYPE:
*(u_int *)data = WSDISPLAY_TYPE_PCIMISC;
return 0;

/* PCI config read/write passthrough. */
case PCI_IOC_CFGREAD:
case PCI_IOC_CFGWRITE:
return pci_devioctl(sc->sc_pc, sc->sc_pcitag,
cmd, data, flag, l);

case WSDISPLAYIO_GET_BUSID:
return wsdisplayio_busid_pci(sc->sc_dev, sc->sc_pc,
sc->sc_pcitag, data);

case WSDISPLAYIO_GINFO:
if (ms == NULL)
return ENODEV;
wdf = (void *)data;
wdf->height = ms->scr_ri.ri_height;
wdf->width = ms->scr_ri.ri_width;
wdf->depth = ms->scr_ri.ri_depth;
wdf->cmsize = 256;
return 0;

case WSDISPLAYIO_GETCMAP:
return r128fb_getcmap(sc,
(struct wsdisplay_cmap *)data);

case WSDISPLAYIO_PUTCMAP:
return r128fb_putcmap(sc,
(struct wsdisplay_cmap *)data);

case WSDISPLAYIO_LINEBYTES:
*(u_int *)data = sc->sc_stride;
return 0;

case WSDISPLAYIO_SMODE: {
int new_mode = *(int*)data;
if (new_mode != sc->sc_mode) {
sc->sc_mode = new_mode;
if(new_mode == WSDISPLAYIO_MODE_EMUL) {
r128fb_init(sc);
r128fb_restore_palette(sc);
glyphcache_wipe(&sc->sc_gc);
r128fb_rectfill(sc, 0, 0, sc->sc_width,
sc->sc_height, ms->scr_ri.ri_devcmap[
(ms->scr_defattr >> 16) & 0xff]);
vcons_redraw_screen(ms);
}
}
}
return 0;

case WSDISPLAYIO_GETPARAM:
param = (struct wsdisplay_param *)data;
if (sc->sc_have_backlight == 0)
return EPASSTHROUGH;
switch (param->param) {
case WSDISPLAYIO_PARAM_BRIGHTNESS:
param->min = 0;
param->max = 255;
param->curval = sc->sc_bl_level;
return 0;
case WSDISPLAYIO_PARAM_BACKLIGHT:
param->min = 0;
param->max = 1;
param->curval = sc->sc_bl_on;
return 0;
}
return EPASSTHROUGH;

case WSDISPLAYIO_SETPARAM:
param = (struct wsdisplay_param *)data;
if (sc->sc_have_backlight == 0)
return EPASSTHROUGH;
switch (param->param) {
case WSDISPLAYIO_PARAM_BRIGHTNESS:
r128fb_set_backlight(sc, param->curval);
return 0;
case WSDISPLAYIO_PARAM_BACKLIGHT:
r128fb_switch_backlight(sc, param->curval);
return 0;
}
return EPASSTHROUGH;

case WSDISPLAYIO_GET_EDID: {
struct wsdisplayio_edid_info *d = data;
return wsdisplayio_get_edid(sc->sc_dev, d);
}

case WSDISPLAYIO_GET_FBINFO:
{
struct wsdisplayio_fbinfo *fbi = data;

return wsdisplayio_get_fbinfo(&ms->scr_ri, fbi);
}
}
return EPASSTHROUGH;
}

static paddr_t
r128fb_mmap(void *v, void *vs, off_t offset, int prot)
{
struct vcons_data *vd = v;
struct r128fb_softc *sc = vd->cookie;
paddr_t pa;

/* 'regular' framebuffer mmap()ing */
if (offset < sc->sc_fbsize) {
pa = bus_space_mmap(sc->sc_memt, sc->sc_fb + offset, 0, prot,
BUS_SPACE_MAP_LINEAR);
return pa;
}

/*
* restrict all other mappings to processes with superuser privileges
* or the kernel itself
*/
if (kauth_authorize_machdep(kauth_cred_get(), KAUTH_MACHDEP_UNMANAGEDMEM,
NULL, NULL, NULL, NULL) != 0) {
aprint_normal("%s: mmap() rejected.\n",
device_xname(sc->sc_dev));
return -1;
}

if ((offset >= sc->sc_fb) && (offset < (sc->sc_fb + sc->sc_fbsize))) {
pa = bus_space_mmap(sc->sc_memt, offset, 0, prot,
BUS_SPACE_MAP_LINEAR);
return pa;
}

if ((offset >= sc->sc_reg) &&
(offset < (sc->sc_reg + sc->sc_regsize))) {
pa = bus_space_mmap(sc->sc_memt, offset, 0, prot,
BUS_SPACE_MAP_LINEAR);
return pa;
}

#ifdef PCI_MAGIC_IO_RANGE
/* allow mapping of IO space */
if ((offset >= PCI_MAGIC_IO_RANGE) &&
(offset < PCI_MAGIC_IO_RANGE + 0x10000)) {
pa = bus_space_mmap(sc->sc_iot, offset - PCI_MAGIC_IO_RANGE,
0, prot, BUS_SPACE_MAP_LINEAR);
return pa;
}
#endif

#ifdef OFB_ALLOW_OTHERS
if (offset >= 0x80000000) {
pa = bus_space_mmap(sc->sc_memt, offset, 0, prot,
BUS_SPACE_MAP_LINEAR);
return pa;
}
#endif
return -1;
}

static void
r128fb_init_screen(void *cookie, struct vcons_screen *scr,
int existing, long *defattr)
{
struct r128fb_softc *sc = cookie;
struct rasops_info *ri = &scr->scr_ri;

ri->ri_depth = sc->sc_depth;
ri->ri_width = sc->sc_width;
ri->ri_height = sc->sc_height;
ri->ri_stride = sc->sc_stride;
ri->ri_flg = RI_CENTER;
if (sc->sc_depth == 8)
ri->ri_flg |= RI_8BIT_IS_RGB | RI_ENABLE_ALPHA |
RI_PREFER_ALPHA;

rasops_init(ri, 0, 0);
ri->ri_caps = WSSCREEN_WSCOLORS | WSSCREEN_HILIT | WSSCREEN_UNDERLINE |
WSSCREEN_RESIZE;
#ifdef VCONS_DRAW_INTR
scr->scr_flags |= VCONS_DONT_READ;
#endif
scr->scr_flags |= VCONS_LOADFONT;

rasops_reconfig(ri, sc->sc_height / ri->ri_font->fontheight,
sc->sc_width / ri->ri_font->fontwidth);

ri->ri_hw = scr;
ri->ri_ops.copyrows = r128fb_copyrows;
ri->ri_ops.copycols = r128fb_copycols;
ri->ri_ops.eraserows = r128fb_eraserows;
ri->ri_ops.erasecols = r128fb_erasecols;
ri->ri_ops.cursor = r128fb_cursor;
if (FONT_IS_ALPHA(ri->ri_font)) {
ri->ri_ops.putchar = r128fb_putchar_aa;
} else
ri->ri_ops.putchar = r128fb_putchar;
}

static int
r128fb_putcmap(struct r128fb_softc *sc, struct wsdisplay_cmap *cm)
{
u_char *r, *g, *b;
u_int index = cm->index;
u_int count = cm->count;
int i, error;
u_char rbuf[256], gbuf[256], bbuf[256];

#ifdef R128FB_DEBUG
aprint_debug("putcmap: %d %d\n",index, count);
#endif
if (cm->index >= 256 || cm->count > 256 ||
(cm->index + cm->count) > 256)
return EINVAL;
error = copyin(cm->red, &rbuf[index], count);
if (error)
return error;
error = copyin(cm->green, &gbuf[index], count);
if (error)
return error;
error = copyin(cm->blue, &bbuf[index], count);
if (error)
return error;

memcpy(&sc->sc_cmap_red[index], &rbuf[index], count);
memcpy(&sc->sc_cmap_green[index], &gbuf[index], count);
memcpy(&sc->sc_cmap_blue[index], &bbuf[index], count);

r = &sc->sc_cmap_red[index];
g = &sc->sc_cmap_green[index];
b = &sc->sc_cmap_blue[index];

for (i = 0; i < count; i++) {
r128fb_putpalreg(sc, index, *r, *g, *b);
index++;
r++, g++, b++;
}
return 0;
}

static int
r128fb_getcmap(struct r128fb_softc *sc, struct wsdisplay_cmap *cm)
{
u_int index = cm->index;
u_int count = cm->count;
int error;

if (index >= 255 || count > 256 || index + count > 256)
return EINVAL;

error = copyout(&sc->sc_cmap_red[index], cm->red, count);
if (error)
return error;
error = copyout(&sc->sc_cmap_green[index], cm->green, count);
if (error)
return error;
error = copyout(&sc->sc_cmap_blue[index], cm->blue, count);
if (error)
return error;

return 0;
}

static void
r128fb_restore_palette(struct r128fb_softc *sc)
{
int i;

for (i = 0; i < (1 << sc->sc_depth); i++) {
r128fb_putpalreg(sc, i, sc->sc_cmap_red[i],
sc->sc_cmap_green[i], sc->sc_cmap_blue[i]);
}
}

static int
r128fb_putpalreg(struct r128fb_softc *sc, uint8_t idx, uint8_t r, uint8_t g,
uint8_t b)
{
uint32_t reg;

/* whack the DAC */
reg = (r << 16) | (g << 8) | b;
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_PALETTE_INDEX, idx);
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_PALETTE_DATA, reg);
return 0;
}

static void
r128fb_init(struct r128fb_softc *sc)
{
uint32_t datatype, d, reg;

r128fb_flush_engine(sc);

r128fb_wait(sc, 9);
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_CRTC_OFFSET, 0);
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_DEFAULT_OFFSET, 0);
/* pitch is in units of 8 pixels */
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_DEFAULT_PITCH,
sc->sc_width >> 3);
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_AUX_SC_CNTL, 0);
bus_space_write_4(sc->sc_memt, sc->sc_regh,
R128_DEFAULT_SC_BOTTOM_RIGHT,
R128_DEFAULT_SC_RIGHT_MAX | R128_DEFAULT_SC_BOTTOM_MAX);
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_SC_TOP_LEFT, 0);
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_SC_BOTTOM_RIGHT,
R128_DEFAULT_SC_RIGHT_MAX | R128_DEFAULT_SC_BOTTOM_MAX);
bus_space_write_4(sc->sc_memt, sc->sc_regh,
R128_DEFAULT_SC_BOTTOM_RIGHT,
R128_DEFAULT_SC_RIGHT_MAX | R128_DEFAULT_SC_BOTTOM_MAX);

#if 0
#if BYTE_ORDER == BIG_ENDIAN
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_DP_DATATYPE,
R128_HOST_BIG_ENDIAN_EN);
#else
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_DP_DATATYPE, 0);
#endif
#endif
r128fb_wait(sc, 7);
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_SRC_PITCH,
sc->sc_width >> 3);
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_DST_PITCH,
sc->sc_width >> 3);
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_SRC_OFFSET, 0);
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_DST_OFFSET, 0);
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_DP_WRITE_MASK,
0xffffffff);

switch (sc->sc_depth) {
case 8:
datatype = R128_GMC_DST_8BPP_CI;
d = R128_CRTC_COLOR_8BIT;
break;
case 15:
datatype = R128_GMC_DST_15BPP;
d = R128_CRTC_COLOR_15BIT;
break;
case 16:
datatype = R128_GMC_DST_16BPP;
d = R128_CRTC_COLOR_16BIT;
break;
case 24:
datatype = R128_GMC_DST_24BPP;
d = R128_CRTC_COLOR_24BIT;
break;
case 32:
datatype = R128_GMC_DST_32BPP;
d = R128_CRTC_COLOR_32BIT;
break;
default:
aprint_error("%s: unsupported depth %d\n",
device_xname(sc->sc_dev), sc->sc_depth);
return;
}
sc->sc_master_cntl = R128_GMC_CLR_CMP_CNTL_DIS |
R128_GMC_AUX_CLIP_DIS | datatype;
reg = bus_space_read_4(sc->sc_memt, sc->sc_regh, R128_CRTC_GEN_CNTL);
DPRINTF("depth: %d\n", reg & R128_CRTC_PIX_WIDTH);
reg &= ~R128_CRTC_PIX_WIDTH;
reg |= d;
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_CRTC_GEN_CNTL, reg);
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_CRTC_PITCH, sc->sc_width >> 3);
r128fb_flush_engine(sc);
}

static void
r128fb_rectfill(struct r128fb_softc *sc, int x, int y, int wi, int he,
uint32_t colour)
{

r128fb_wait(sc, 5);
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_DP_GUI_MASTER_CNTL,
R128_GMC_BRUSH_SOLID_COLOR |
R128_GMC_SRC_DATATYPE_COLOR |
R128_ROP3_P |
sc->sc_master_cntl);

bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_DP_BRUSH_FRGD_CLR,
colour);
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_DP_CNTL,
R128_DST_X_LEFT_TO_RIGHT | R128_DST_Y_TOP_TO_BOTTOM);
/* now feed it coordinates */
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_DST_X_Y,
(x << 16) | y);
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_DST_WIDTH_HEIGHT,
(wi << 16) | he);
}

static void
r128fb_bitblt(void *cookie, int xs, int ys, int xd, int yd,
int wi, int he, int rop)
{
struct r128fb_softc *sc = cookie;
uint32_t dp_cntl = 0;

r128fb_wait(sc, 5);
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_DP_GUI_MASTER_CNTL,
R128_GMC_BRUSH_SOLID_COLOR |
R128_GMC_SRC_DATATYPE_COLOR |
rop |
R128_DP_SRC_SOURCE_MEMORY |
sc->sc_master_cntl);

if (yd <= ys) {
dp_cntl = R128_DST_Y_TOP_TO_BOTTOM;
} else {
ys += he - 1;
yd += he - 1;
}
if (xd <= xs) {
dp_cntl |= R128_DST_X_LEFT_TO_RIGHT;
} else {
xs += wi - 1;
xd += wi - 1;
}
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_DP_CNTL, dp_cntl);

/* now feed it coordinates */
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_SRC_X_Y,
(xs << 16) | ys);
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_DST_X_Y,
(xd << 16) | yd);
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_DST_WIDTH_HEIGHT,
(wi << 16) | he);
}

static void
r128fb_cursor(void *cookie, int on, int row, int col)
{
struct rasops_info *ri = cookie;
struct vcons_screen *scr = ri->ri_hw;
struct r128fb_softc *sc = scr->scr_cookie;
int x, y, wi, he;

wi = ri->ri_font->fontwidth;
he = ri->ri_font->fontheight;

if (sc->sc_mode == WSDISPLAYIO_MODE_EMUL) {
if (ri->ri_flg & RI_CURSOR) {
x = ri->ri_ccol * wi + ri->ri_xorigin;
y = ri->ri_crow * he + ri->ri_yorigin;
r128fb_bitblt(sc, x, y, x, y, wi, he, R128_ROP3_Dn);
ri->ri_flg &= ~RI_CURSOR;
}
ri->ri_crow = row;
ri->ri_ccol = col;
if (on) {
x = ri->ri_ccol * wi + ri->ri_xorigin;
y = ri->ri_crow * he + ri->ri_yorigin;
r128fb_bitblt(sc, x, y, x, y, wi, he, R128_ROP3_Dn);
ri->ri_flg |= RI_CURSOR;
}
} else {
scr->scr_ri.ri_crow = row;
scr->scr_ri.ri_ccol = col;
scr->scr_ri.ri_flg &= ~RI_CURSOR;
}

}

static void
r128fb_putchar(void *cookie, int row, int col, u_int c, long attr)
{
struct rasops_info *ri = cookie;
struct wsdisplay_font *font = PICK_FONT(ri, c);
struct vcons_screen *scr = ri->ri_hw;
struct r128fb_softc *sc = scr->scr_cookie;
void *data;
uint32_t fg, bg;
int i, x, y, wi, he, offset;

if (sc->sc_mode != WSDISPLAYIO_MODE_EMUL)
return;

if (!CHAR_IN_FONT(c, font))
return;

wi = font->fontwidth;
he = font->fontheight;

bg = ri->ri_devcmap[(attr >> 16) & 0xf];
fg = ri->ri_devcmap[(attr >> 24) & 0xf];
x = ri->ri_xorigin + col * wi;
y = ri->ri_yorigin + row * he;

if (c == 0x20) {
r128fb_rectfill(sc, x, y, wi, he, bg);
return;
}

data = WSFONT_GLYPH(c, font);

r128fb_wait(sc, 8);

bus_space_write_4(sc->sc_memt, sc->sc_regh,
R128_DP_GUI_MASTER_CNTL,
R128_GMC_BRUSH_SOLID_COLOR |
R128_GMC_SRC_DATATYPE_MONO_FG_BG |
R128_ROP3_S |
R128_DP_SRC_SOURCE_HOST_DATA |
R128_GMC_DST_CLIPPING |
sc->sc_master_cntl);

bus_space_write_4(sc->sc_memt, sc->sc_regh,
R128_DP_CNTL,
R128_DST_Y_TOP_TO_BOTTOM |
R128_DST_X_LEFT_TO_RIGHT);

bus_space_write_4(sc->sc_memt, sc->sc_regh,
R128_DP_SRC_FRGD_CLR, fg);
bus_space_write_4(sc->sc_memt, sc->sc_regh,
R128_DP_SRC_BKGD_CLR, bg);

/*
* The Rage 128 doesn't have anything to skip pixels
* when colour expanding but all coordinates
* are signed so we just clip the leading bytes and
* trailing bits away
*/
bus_space_write_4(sc->sc_memt, sc->sc_regh,
R128_SC_RIGHT, x + wi - 1);
bus_space_write_4(sc->sc_memt, sc->sc_regh,
R128_SC_LEFT, x);

/* needed? */
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_SRC_X_Y, 0);

offset = 32 - (font->stride << 3);
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_DST_X_Y,
((x - offset) << 16) | y);
bus_space_write_4(sc->sc_memt, sc->sc_regh,
R128_DST_WIDTH_HEIGHT, (32 << 16) | he);

r128fb_wait(sc, he);
switch (font->stride) {
case 1: {
uint8_t *data8 = data;
uint32_t reg;
for (i = 0; i < he; i++) {
reg = *data8;
bus_space_write_stream_4(sc->sc_memt,
sc->sc_regh, R128_HOST_DATA0, reg);
data8++;
}
break;
}
case 2: {
uint16_t *data16 = data;
uint32_t reg;
for (i = 0; i < he; i++) {
reg = *data16;
bus_space_write_stream_4(sc->sc_memt,
sc->sc_regh, R128_HOST_DATA0, reg);
data16++;
}
break;
}
}
}

static void
r128fb_putchar_aa(void *cookie, int row, int col, u_int c, long attr)
{
struct rasops_info *ri = cookie;
struct wsdisplay_font *font = PICK_FONT(ri, c);
struct vcons_screen *scr = ri->ri_hw;
struct r128fb_softc *sc = scr->scr_cookie;
uint32_t bg, latch = 0, bg8, fg8, pixel;
int i, x, y, wi, he, r, g, b, aval;
int r1, g1, b1, r0, g0, b0, fgo, bgo;
uint8_t *data8;
int rv, cnt = 0;

if (sc->sc_mode != WSDISPLAYIO_MODE_EMUL)
return;

if (!CHAR_IN_FONT(c, font))
return;

wi = font->fontwidth;
he = font->fontheight;

bg = ri->ri_devcmap[(attr >> 16) & 0xf];
x = ri->ri_xorigin + col * wi;
y = ri->ri_yorigin + row * he;
if (c == 0x20) {
r128fb_rectfill(sc, x, y, wi, he, bg);
return;
}

rv = glyphcache_try(&sc->sc_gc, c, x, y, attr);
if (rv == GC_OK)
return;

data8 = WSFONT_GLYPH(c, font);

r128fb_wait(sc, 5);
bus_space_write_4(sc->sc_memt, sc->sc_regh,
R128_DP_GUI_MASTER_CNTL,
R128_GMC_BRUSH_SOLID_COLOR |
R128_GMC_SRC_DATATYPE_COLOR |
R128_ROP3_S |
R128_DP_SRC_SOURCE_HOST_DATA |
sc->sc_master_cntl);

bus_space_write_4(sc->sc_memt, sc->sc_regh,
R128_DP_CNTL,
R128_DST_Y_TOP_TO_BOTTOM |
R128_DST_X_LEFT_TO_RIGHT);

/* needed? */
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_SRC_X_Y, 0);
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_DST_X_Y,
(x << 16) | y);
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_DST_WIDTH_HEIGHT,
(wi << 16) | he);

/*
* we need the RGB colours here, so get offsets into rasops_cmap
*/
fgo = ((attr >> 24) & 0xf) * 3;
bgo = ((attr >> 16) & 0xf) * 3;

r0 = rasops_cmap[bgo];
r1 = rasops_cmap[fgo];
g0 = rasops_cmap[bgo + 1];
g1 = rasops_cmap[fgo + 1];
b0 = rasops_cmap[bgo + 2];
b1 = rasops_cmap[fgo + 2];
#define R3G3B2(r, g, b) ((r & 0xe0) | ((g >> 3) & 0x1c) | (b >> 6))
bg8 = R3G3B2(r0, g0, b0);
fg8 = R3G3B2(r1, g1, b1);

r128fb_wait(sc, 16);

for (i = 0; i < ri->ri_fontscale; i++) {
aval = *data8;
if (aval == 0) {
pixel = bg8;
} else if (aval == 255) {
pixel = fg8;
} else {
r = aval * r1 + (255 - aval) * r0;
g = aval * g1 + (255 - aval) * g0;
b = aval * b1 + (255 - aval) * b0;
pixel = ((r & 0xe000) >> 8) |
((g & 0xe000) >> 11) |
((b & 0xc000) >> 14);
}
latch = (latch << 8) | pixel;
/* write in 32bit chunks */
if ((i & 3) == 3) {
bus_space_write_stream_4(sc->sc_memt, sc->sc_regh,
R128_HOST_DATA0, latch);
/*
* not strictly necessary, old data should be shifted
* out
*/
latch = 0;
cnt++;
if (cnt > 15) {
r128fb_wait(sc, 16);
cnt = 0;
}
}
data8++;
}
/* if we have pixels left in latch write them out */
if ((i & 3) != 0) {
latch = latch << ((4 - (i & 3)) << 3);
bus_space_write_stream_4(sc->sc_memt, sc->sc_regh,
R128_HOST_DATA0, latch);
}
if (rv == GC_ADD) {
glyphcache_add(&sc->sc_gc, c, x, y);
}
}

static void
r128fb_copycols(void *cookie, int row, int srccol, int dstcol, int ncols)
{
struct rasops_info *ri = cookie;
struct vcons_screen *scr = ri->ri_hw;
struct r128fb_softc *sc = scr->scr_cookie;
int32_t xs, xd, y, width, height;

if ((sc->sc_locked == 0) && (sc->sc_mode == WSDISPLAYIO_MODE_EMUL)) {
xs = ri->ri_xorigin + ri->ri_font->fontwidth * srccol;
xd = ri->ri_xorigin + ri->ri_font->fontwidth * dstcol;
y = ri->ri_yorigin + ri->ri_font->fontheight * row;
width = ri->ri_font->fontwidth * ncols;
height = ri->ri_font->fontheight;
r128fb_bitblt(sc, xs, y, xd, y, width, height, R128_ROP3_S);
}
}

static void
r128fb_erasecols(void *cookie, int row, int startcol, int ncols, long fillattr)
{
struct rasops_info *ri = cookie;
struct vcons_screen *scr = ri->ri_hw;
struct r128fb_softc *sc = scr->scr_cookie;
int32_t x, y, width, height, fg, bg, ul;

if ((sc->sc_locked == 0) && (sc->sc_mode == WSDISPLAYIO_MODE_EMUL)) {
x = ri->ri_xorigin + ri->ri_font->fontwidth * startcol;
y = ri->ri_yorigin + ri->ri_font->fontheight * row;
width = ri->ri_font->fontwidth * ncols;
height = ri->ri_font->fontheight;
rasops_unpack_attr(fillattr, &fg, &bg, &ul);

r128fb_rectfill(sc, x, y, width, height, ri->ri_devcmap[bg]);
}
}

static void
r128fb_copyrows(void *cookie, int srcrow, int dstrow, int nrows)
{
struct rasops_info *ri = cookie;
struct vcons_screen *scr = ri->ri_hw;
struct r128fb_softc *sc = scr->scr_cookie;
int32_t x, ys, yd, width, height;

if ((sc->sc_locked == 0) && (sc->sc_mode == WSDISPLAYIO_MODE_EMUL)) {
x = ri->ri_xorigin;
ys = ri->ri_yorigin + ri->ri_font->fontheight * srcrow;
yd = ri->ri_yorigin + ri->ri_font->fontheight * dstrow;
width = ri->ri_emuwidth;
height = ri->ri_font->fontheight * nrows;
r128fb_bitblt(sc, x, ys, x, yd, width, height, R128_ROP3_S);
}
}

static void
r128fb_eraserows(void *cookie, int row, int nrows, long fillattr)
{
struct rasops_info *ri = cookie;
struct vcons_screen *scr = ri->ri_hw;
struct r128fb_softc *sc = scr->scr_cookie;
int32_t x, y, width, height, fg, bg, ul;

if ((sc->sc_locked == 0) && (sc->sc_mode == WSDISPLAYIO_MODE_EMUL)) {
x = ri->ri_xorigin;
y = ri->ri_yorigin + ri->ri_font->fontheight * row;
width = ri->ri_emuwidth;
height = ri->ri_font->fontheight * nrows;
rasops_unpack_attr(fillattr, &fg, &bg, &ul);

r128fb_rectfill(sc, x, y, width, height, ri->ri_devcmap[bg]);
}
}

static void
r128fb_set_backlight(struct r128fb_softc *sc, int level)
{
uint32_t reg;

/*
* should we do nothing when backlight is off, should we just store the
* level and use it when turning back on or should we just flip sc_bl_on
* and turn the backlight on?
* For now turn it on so a crashed screensaver can't get the user stuck
* with a dark screen as long as hotkeys work
*/
if (level > 255) level = 255;
if (level < 0) level = 0;
if (level == sc->sc_bl_level)
return;
sc->sc_bl_level = level;
if (sc->sc_bl_on == 0)
sc->sc_bl_on = 1;
level = 255 - level;
reg = bus_space_read_4(sc->sc_memt, sc->sc_regh, R128_LVDS_GEN_CNTL);
reg &= ~R128_LEVEL_MASK;
reg |= (level << R128_LEVEL_SHIFT);
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_LVDS_GEN_CNTL, reg);
DPRINTF("backlight level: %d reg %08x\n", level, reg);
}

static void
r128fb_switch_backlight(struct r128fb_softc *sc, int on)
{
uint32_t reg;
int level;

if (on == sc->sc_bl_on)
return;
sc->sc_bl_on = on;
reg = bus_space_read_4(sc->sc_memt, sc->sc_regh, R128_LVDS_GEN_CNTL);
reg &= ~R128_LEVEL_MASK;
level = on ? 255 - sc->sc_bl_level : 255;
reg |= level << R128_LEVEL_SHIFT;
bus_space_write_4(sc->sc_memt, sc->sc_regh, R128_LVDS_GEN_CNTL, reg);
DPRINTF("backlight state: %d reg %08x\n", on, reg);
}

static void
r128fb_brightness_up(device_t dev)
{
struct r128fb_softc *sc = device_private(dev);

r128fb_set_backlight(sc, sc->sc_bl_level + 8);
}

static void
r128fb_brightness_down(device_t dev)
{
struct r128fb_softc *sc = device_private(dev);

r128fb_set_backlight(sc, sc->sc_bl_level - 8);
}