Expand PMF_FN_* macros.

[netbsd-mini2440.git] / sys / dev / pci / chipsfb.c

/*      $NetBSD: chipsfb.c,v 1.19 2009/05/12 08:23:00 cegger Exp $      */

/*
 * Copyright (c) 2006 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 Chips & Technologies 65550 graphics controllers
 * tested on macppc only so far
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: chipsfb.c,v 1.19 2009/05/12 08:23:00 cegger Exp $");

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

#include <uvm/uvm_extern.h>

#include <dev/videomode/videomode.h>

#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcidevs.h>
#include <dev/pci/pciio.h>
#include <dev/pci/chipsfbreg.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/i2c/i2cvar.h>

#include "opt_wsemul.h"
#include "opt_chipsfb.h"

struct chipsfb_softc {
        struct device 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_memh;

        bus_space_tag_t sc_fbt;
        bus_space_tag_t sc_ioregt;
        bus_space_handle_t sc_fbh;
        bus_space_handle_t sc_ioregh;
        bus_addr_t sc_fb, sc_ioreg;
        bus_size_t sc_fbsize, sc_ioregsize;

        void *sc_ih;

        size_t memsize;

        int bits_per_pixel;
        int width, height, linebytes;

        int sc_mode;
        uint32_t sc_bg;

        u_char sc_cmap_red[256];
        u_char sc_cmap_green[256];
        u_char sc_cmap_blue[256];
        int sc_dacw;

        /*
         * I2C stuff
         * DDC2 clock is on GPIO1, data on GPIO0
         */
        struct i2c_controller sc_i2c;
        uint8_t sc_edid[1024];
        int sc_edidbytes;       /* number of bytes read from the monitor */

        struct vcons_data vd;
};

static struct vcons_screen chipsfb_console_screen;

extern const u_char rasops_cmap[768];

static int      chipsfb_match(device_t, cfdata_t, void *);
static void     chipsfb_attach(device_t, device_t, void *);

CFATTACH_DECL(chipsfb, sizeof(struct chipsfb_softc), chipsfb_match,
    chipsfb_attach, NULL, NULL);

static void     chipsfb_init(struct chipsfb_softc *);

static void     chipsfb_cursor(void *, int, int, int);
static void     chipsfb_copycols(void *, int, int, int, int);
static void     chipsfb_erasecols(void *, int, int, int, long);
static void     chipsfb_copyrows(void *, int, int, int);
static void     chipsfb_eraserows(void *, int, int, long);

#if 0
static int      chipsfb_allocattr(void *, int, int, int, long *);
static void     chipsfb_scroll(void *, void *, int);
static int      chipsfb_load_font(void *, void *, struct wsdisplay_font *);
#endif

static int      chipsfb_putcmap(struct chipsfb_softc *,
                            struct wsdisplay_cmap *);
static int      chipsfb_getcmap(struct chipsfb_softc *,
                            struct wsdisplay_cmap *);
static int      chipsfb_putpalreg(struct chipsfb_softc *, uint8_t, uint8_t,
                            uint8_t, uint8_t);

static void     chipsfb_bitblt(struct chipsfb_softc *, int, int, int, int,
                            int, int, uint8_t);
static void     chipsfb_rectfill(struct chipsfb_softc *, int, int, int, int,
                            int);
static void     chipsfb_putchar(void *, int, int, u_int, long);
static void     chipsfb_setup_mono(struct chipsfb_softc *, int, int, int,
                            int, uint32_t, uint32_t);
static void     chipsfb_feed(struct chipsfb_softc *, int, uint8_t *);

#if 0
static void     chipsfb_showpal(struct chipsfb_softc *);
#endif
static void     chipsfb_restore_palette(struct chipsfb_softc *);

static void     chipsfb_wait_idle(struct chipsfb_softc *);

static uint32_t chipsfb_probe_vram(struct chipsfb_softc *);

struct wsscreen_descr chipsfb_defaultscreen = {
        "default",
        0, 0,
        NULL,
        8, 16,
        WSSCREEN_WSCOLORS | WSSCREEN_HILIT,
};

const struct wsscreen_descr *_chipsfb_scrlist[] = {
        &chipsfb_defaultscreen,
        /* XXX other formats, graphics screen? */
};

struct wsscreen_list chipsfb_screenlist = {
        sizeof(_chipsfb_scrlist) / sizeof(struct wsscreen_descr *), _chipsfb_scrlist
};

static int      chipsfb_ioctl(void *, void *, u_long, void *, int,
                    struct lwp *);
static paddr_t  chipsfb_mmap(void *, void *, off_t, int);
static void     chipsfb_clearscreen(struct chipsfb_softc *);
static void     chipsfb_init_screen(void *, struct vcons_screen *, int,
                            long *);


struct wsdisplay_accessops chipsfb_accessops = {
        chipsfb_ioctl,
        chipsfb_mmap,
        NULL,   /* load_font */
        NULL,   /* polls */
        NULL,   /* scroll */
};

/*
 * Inline functions for getting access to register aperture.
 */
static inline void
chipsfb_write32(struct chipsfb_softc *sc, uint32_t reg, uint32_t val)
{
        bus_space_write_4(sc->sc_fbt, sc->sc_fbh, reg, val);
}

static inline uint32_t
chipsfb_read32(struct chipsfb_softc *sc, uint32_t reg)
{
        return bus_space_read_4(sc->sc_fbt, sc->sc_fbh, reg);
}

static inline void
chipsfb_write_vga(struct chipsfb_softc *sc, uint32_t reg,  uint8_t val)
{
        bus_space_write_1(sc->sc_iot, sc->sc_ioregh, reg, val);
}

static inline uint8_t
chipsfb_read_vga(struct chipsfb_softc *sc, uint32_t reg)
{
        return bus_space_read_1(sc->sc_iot, sc->sc_ioregh, reg);
}

static inline uint8_t
chipsfb_read_indexed(struct chipsfb_softc *sc, uint32_t reg, uint8_t index)
{

        chipsfb_write_vga(sc, reg & 0xfffe, index);
        return chipsfb_read_vga(sc, reg | 0x0001);
}

static inline void
chipsfb_write_indexed(struct chipsfb_softc *sc, uint32_t reg, uint8_t index,
    uint8_t val)
{

        chipsfb_write_vga(sc, reg & 0xfffe, index);
        chipsfb_write_vga(sc, reg | 0x0001, val);
}

static void
chipsfb_wait_idle(struct chipsfb_softc *sc)
{

#ifdef CHIPSFB_DEBUG
        chipsfb_write32(sc, CT_OFF_FB + (800 * 598) - 4, 0);
#endif

        /* spin until the blitter is idle */
        while ((chipsfb_read32(sc, CT_BLT_CONTROL) & BLT_IS_BUSY) != 0) {
        }

#ifdef CHIPSFB_DEBUG
        chipsfb_write32(sc, CT_OFF_FB + (800 * 598) - 4, 0xffffffff);
#endif
}

static int
chipsfb_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 ||
            PCI_SUBCLASS(pa->pa_class) != PCI_SUBCLASS_DISPLAY_VGA)
                return 0;
        if ((PCI_VENDOR(pa->pa_id) == PCI_VENDOR_CHIPS) &&
            (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_CHIPS_65550))
                return 100;
        if ((PCI_VENDOR(pa->pa_id) == PCI_VENDOR_CHIPS) &&
            (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_CHIPS_65554))
                return 100;
        return 0;
}

static void
chipsfb_attach(device_t parent, device_t self, void *aux)
{
        struct chipsfb_softc *sc = device_private(self);
        struct pci_attach_args *pa = aux;
        char devinfo[256];
        struct wsemuldisplaydev_attach_args aa;
        struct rasops_info *ri;
        prop_dictionary_t dict;
        pcireg_t screg;
        ulong defattr;
        bool console = false;
        int width, height, i, j;
        uint32_t bg, fg, ul;

        dict = device_properties(self);
        sc->sc_mode = WSDISPLAYIO_MODE_EMUL;
        sc->sc_pc = pa->pa_pc;
        sc->sc_pcitag = pa->pa_tag;
        sc->sc_dacw = -1;

        screg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, PCI_COMMAND_STATUS_REG);
        screg |= PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED;
        pci_conf_write(sc->sc_pc, sc->sc_pcitag,PCI_COMMAND_STATUS_REG,screg);

        pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo));
        aprint_normal(": %s (rev. 0x%02x)\n", devinfo, PCI_REVISION(pa->pa_class));
#ifdef CHIPSFB_DEBUG
        printf(prop_dictionary_externalize(dict));
#endif

        sc->sc_memt = pa->pa_memt;
        sc->sc_iot = pa->pa_iot;

        /* the framebuffer */
        if (pci_mapreg_map(pa, 0x10, PCI_MAPREG_TYPE_MEM,
            BUS_SPACE_MAP_LINEAR,
            &sc->sc_fbt, &sc->sc_fbh, &sc->sc_fb, &sc->sc_fbsize)) {
                aprint_error_dev(&sc->sc_dev, "failed to map the frame buffer.\n");
        }

        /* IO-mapped registers */
        if (bus_space_map(sc->sc_iot, 0x0, 0x400, 0, &sc->sc_ioregh) != 0) {
                aprint_error_dev(&sc->sc_dev, "failed to map IO registers.\n");
        }

        sc->memsize = chipsfb_probe_vram(sc);
        chipsfb_init(sc);

        /* we should read these from the chip instead of depending on OF */
        width = height = -1;

        /* detect panel size */
        width = chipsfb_read_indexed(sc, CT_FP_INDEX, FP_HSIZE_LSB);
        width |= (chipsfb_read_indexed(sc, CT_FP_INDEX, FP_HORZ_OVERFLOW_1)
            & 0x0f) << 8;
        width = (width + 1) * 8;
        height = chipsfb_read_indexed(sc, CT_FP_INDEX, FP_VSIZE_LSB);
        height |= (chipsfb_read_indexed(sc, CT_FP_INDEX, FP_VERT_OVERFLOW_1)
            & 0x0f) << 8;
        height++;
        aprint_verbose("Panel size: %d x %d\n", width, height);

        if (!prop_dictionary_get_uint32(dict, "width", &sc->width))
                sc->width = width;
        if (!prop_dictionary_get_uint32(dict, "height", &sc->height))
                sc->height = height;
        if (!prop_dictionary_get_uint32(dict, "depth", &sc->bits_per_pixel))
                sc->bits_per_pixel = 8;
        if (!prop_dictionary_get_uint32(dict, "linebytes", &sc->linebytes))
                sc->linebytes = (sc->width * sc->bits_per_pixel) >> 3;

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

#ifdef notyet
        /* XXX this should at least be configurable via kernel config */
        chipsfb_set_videomode(sc, &videomode_list[16]);
#endif

        vcons_init(&sc->vd, sc, &chipsfb_defaultscreen, &chipsfb_accessops);
        sc->vd.init_screen = chipsfb_init_screen;

        ri = &chipsfb_console_screen.scr_ri;
        if (console) {
                vcons_init_screen(&sc->vd, &chipsfb_console_screen, 1,
                    &defattr);
                chipsfb_console_screen.scr_flags |= VCONS_SCREEN_IS_STATIC;

                chipsfb_defaultscreen.textops = &ri->ri_ops;
                chipsfb_defaultscreen.capabilities = ri->ri_caps;
                chipsfb_defaultscreen.nrows = ri->ri_rows;
                chipsfb_defaultscreen.ncols = ri->ri_cols;
                wsdisplay_cnattach(&chipsfb_defaultscreen, ri, 0, 0, defattr);
        } else {
                /*
                 * since we're not the console we can postpone the rest
                 * until someone actually allocates a screen for us
                 */
#ifdef notyet
                chipsfb_set_videomode(sc, &videomode_list[0]);
#endif
        }

        rasops_unpack_attr(defattr, &fg, &bg, &ul);
        sc->sc_bg = ri->ri_devcmap[bg];
        chipsfb_clearscreen(sc);

        if (console)
                vcons_replay_msgbuf(&chipsfb_console_screen);

        aprint_normal_dev(&sc->sc_dev, "%d MB aperture, %d MB VRAM at 0x%08x\n",
            (u_int)(sc->sc_fbsize >> 20),
            sc->memsize >> 20, (u_int)sc->sc_fb);
#ifdef CHIPSFB_DEBUG
        aprint_debug("fb: %08lx\n", (ulong)ri->ri_bits);
#endif

        j = 0;
        for (i = 0; i < 256; i++) {
                chipsfb_putpalreg(sc, i, rasops_cmap[j], rasops_cmap[j + 1],
                    rasops_cmap[j + 2]);
                j += 3;
        }

        aa.console = console;
        aa.scrdata = &chipsfb_screenlist;
        aa.accessops = &chipsfb_accessops;
        aa.accesscookie = &sc->vd;

        config_found(self, &aa, wsemuldisplaydevprint);
}

static int
chipsfb_putpalreg(struct chipsfb_softc *sc, uint8_t index, uint8_t r,
    uint8_t g, uint8_t b)
{

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

        chipsfb_write_vga(sc, CT_DACMASK, 0xff);
        chipsfb_write_vga(sc, CT_WRITEINDEX, index);
        chipsfb_write_vga(sc, CT_DACDATA, r);
        chipsfb_write_vga(sc, CT_DACDATA, g);
        chipsfb_write_vga(sc, CT_DACDATA, b);

        return 0;
}

static int
chipsfb_putcmap(struct chipsfb_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 CHIPSFB_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++) {
                chipsfb_putpalreg(sc, index, *r, *g, *b);
                index++;
                r++, g++, b++;
        }
        return 0;
}

static int
chipsfb_getcmap(struct chipsfb_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
chipsfb_clearscreen(struct chipsfb_softc *sc)
{
        chipsfb_rectfill(sc, 0, 0, sc->width, sc->height, sc->sc_bg);
}

/*
 * wsdisplay_emulops
 */

static void
chipsfb_cursor(void *cookie, int on, int row, int col)
{
        struct rasops_info *ri = cookie;
        struct vcons_screen *scr = ri->ri_hw;
        struct chipsfb_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) {
                x = ri->ri_ccol * wi + ri->ri_xorigin;
                y = ri->ri_crow * he + ri->ri_yorigin;
                if (ri->ri_flg & RI_CURSOR) {
                        chipsfb_bitblt(sc, x, y, x, y, wi, he, ROP_NOT_DST);
                        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;
                        chipsfb_bitblt(sc, x, y, x, y, wi, he, ROP_NOT_DST);
                        ri->ri_flg |= RI_CURSOR;
                }
        } else {
                ri->ri_flg &= ~RI_CURSOR;
                ri->ri_crow = row;
                ri->ri_ccol = col;
        }
}

#if 0
int
chipsfb_mapchar(void *cookie, int uni, u_int *index)
{
        return 0;
}
#endif

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

        if (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;
                chipsfb_bitblt(sc, xs, y, xd, y, width, height, ROP_COPY);
        }
}

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

        if (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);

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

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

        if (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;
                chipsfb_bitblt(sc, x, ys, x, yd, width, height, ROP_COPY);
        }
}

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

        if (sc->sc_mode == WSDISPLAYIO_MODE_EMUL) {
                rasops_unpack_attr(fillattr, &fg, &bg, &ul);
                if ((row == 0) && (nrows == ri->ri_rows)) {
                        /* clear the whole screen */
                        chipsfb_rectfill(sc, 0, 0, ri->ri_width,
                            ri->ri_height, ri->ri_devcmap[bg]);
                } else {
                        x = ri->ri_xorigin;
                        y = ri->ri_yorigin + ri->ri_font->fontheight * row;
                        width = ri->ri_emuwidth;
                        height = ri->ri_font->fontheight * nrows;
                        chipsfb_rectfill(sc, x, y, width, height,
                            ri->ri_devcmap[bg]);
                }
        }
}

static void
chipsfb_bitblt(struct chipsfb_softc *sc, int xs, int ys, int xd, int yd,
    int width, int height, uint8_t rop)
{
        uint32_t src, dst, cmd = rop, stride, size;

        cmd |= BLT_PAT_IS_SOLID;

        /* we assume 8 bit for now */
        src = xs + ys * sc->linebytes;
        dst = xd + yd * sc->linebytes;

        if (xs < xd) {
                /* right-to-left operation */
                cmd |= BLT_START_RIGHT;
                src += width - 1;
                dst += width - 1;
        }

        if (ys < yd) {
                /* bottom-to-top operation */
                cmd |= BLT_START_BOTTOM;
                src += (height - 1) * sc->linebytes;
                dst += (height - 1) * sc->linebytes;
        }

        stride = (sc->linebytes << 16) | sc->linebytes;
        size = (height << 16) | width;

        chipsfb_wait_idle(sc);
        chipsfb_write32(sc, CT_BLT_STRIDE, stride);
        chipsfb_write32(sc, CT_BLT_SRCADDR, src);
        chipsfb_write32(sc, CT_BLT_DSTADDR, dst);
        chipsfb_write32(sc, CT_BLT_CONTROL, cmd);
        chipsfb_write32(sc, CT_BLT_SIZE, size);
#ifdef CHIPSFB_WAIT
        chipsfb_wait_idle(sc);
#endif
}

static void
chipsfb_rectfill(struct chipsfb_softc *sc, int x, int y, int width,
    int height, int colour)
{
        uint32_t dst, cmd, stride, size;

        cmd = BLT_PAT_IS_SOLID | BLT_PAT_IS_MONO | ROP_PAT;

        /* we assume 8 bit for now */
        dst = x + y * sc->linebytes;

        stride = (sc->linebytes << 16) | sc->linebytes;
        size = (height << 16) | width;

        chipsfb_wait_idle(sc);
        chipsfb_write32(sc, CT_BLT_STRIDE, stride);
        chipsfb_write32(sc, CT_BLT_SRCADDR, dst);
        chipsfb_write32(sc, CT_BLT_DSTADDR, dst);
        chipsfb_write32(sc, CT_BLT_CONTROL, cmd);
        chipsfb_write32(sc, CT_BLT_BG, colour);
        chipsfb_write32(sc, CT_BLT_FG, colour);
        chipsfb_write32(sc, CT_BLT_SIZE, size);
#ifdef CHIPSFB_WAIT
        chipsfb_wait_idle(sc);
#endif
}

static void
chipsfb_putchar(void *cookie, int row, int col, u_int c, long attr)
{
        struct rasops_info *ri = cookie;
        struct vcons_screen *scr = ri->ri_hw;
        struct chipsfb_softc *sc = scr->scr_cookie;

        if (__predict_false((unsigned int)row > ri->ri_rows ||
            (unsigned int)col > ri->ri_cols))
                return;

        if (sc->sc_mode == WSDISPLAYIO_MODE_EMUL) {
                uint8_t *data;
                int fg, bg, uc;
                int x, y, wi, he;

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

                if (!CHAR_IN_FONT(c, ri->ri_font))
                        return;
                bg = (u_char)ri->ri_devcmap[(attr >> 16) & 0xf];
                fg = (u_char)ri->ri_devcmap[(attr >> 24) & 0xf];
                x = ri->ri_xorigin + col * wi;
                y = ri->ri_yorigin + row * he;
                if (c == 0x20) {
                        chipsfb_rectfill(sc, x, y, wi, he, bg);
                } else {
                        uc = c-ri->ri_font->firstchar;
                        data = (uint8_t *)ri->ri_font->data + uc *
                            ri->ri_fontscale;
                        chipsfb_setup_mono(sc, x, y, wi, he, fg, bg);
                        chipsfb_feed(sc, ri->ri_font->stride * he, data);
                }
        }
}

static void
chipsfb_setup_mono(struct chipsfb_softc *sc, int xd, int yd, int width,
    int height, uint32_t fg, uint32_t bg)
{
        uint32_t dst, cmd, stride, size;

        cmd = BLT_PAT_IS_SOLID | BLT_SRC_IS_CPU | BLT_SRC_IS_MONO | ROP_COPY;

        /* we assume 8 bit for now */
        dst = xd + yd * sc->linebytes;

        stride = (sc->linebytes << 16);
        size = (height << 16) | width;

        chipsfb_wait_idle(sc);
        chipsfb_write32(sc, CT_BLT_STRIDE, stride);
        chipsfb_write32(sc, CT_BLT_EXPCTL, MONO_SRC_ALIGN_BYTE);
        chipsfb_write32(sc, CT_BLT_DSTADDR, dst);
        chipsfb_write32(sc, CT_BLT_SRCADDR, 0);
        chipsfb_write32(sc, CT_BLT_CONTROL, cmd);
        chipsfb_write32(sc, CT_BLT_BG, bg);
        chipsfb_write32(sc, CT_BLT_FG, fg);
        chipsfb_write32(sc, CT_BLT_SIZE, size);
}

static void
chipsfb_feed(struct chipsfb_softc *sc, int count, uint8_t *data)
{
        int i;
        uint32_t latch = 0, bork;
        int shift = 0;

        for (i = 0; i < count; i++) {
                bork = data[i];
                latch |= (bork << shift);
                if (shift == 24) {
                        chipsfb_write32(sc, CT_OFF_DATA, latch);
                        latch = 0;
                        shift = 0;
                } else
                        shift += 8;
        }

        if (shift != 0) {
                chipsfb_write32(sc, CT_OFF_DATA, latch);
        }

        /* apparently the chip wants 64bit-aligned data or it won't go idle */
        if ((count + 3) & 0x04) {
                chipsfb_write32(sc, CT_OFF_DATA, 0);
        }
#ifdef CHIPSFB_WAIT
        chipsfb_wait_idle(sc);
#endif
}

#if 0
static void
chipsfb_showpal(struct chipsfb_softc *sc)
{
        int i, x = 0;

        for (i = 0; i < 16; i++) {
                chipsfb_rectfill(sc, x, 0, 64, 64, i);
                x += 64;
        }
}
#endif

#if 0
static int
chipsfb_allocattr(void *cookie, int fg, int bg, int flags, long *attrp)
{

        return 0;
}
#endif

static void
chipsfb_restore_palette(struct chipsfb_softc *sc)
{
        int i;

        for (i = 0; i < 256; i++) {
                chipsfb_putpalreg(sc,
                   i,
                   sc->sc_cmap_red[i],
                   sc->sc_cmap_green[i],
                   sc->sc_cmap_blue[i]);
        }
}

/*
 * wsdisplay_accessops
 */

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

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

                case WSDISPLAYIO_GINFO:
                        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 chipsfb_getcmap(sc,
                            (struct wsdisplay_cmap *)data);

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

                /* 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_SMODE:
                        {
                                int new_mode = *(int*)data;
                                if (new_mode != sc->sc_mode) {
                                        sc->sc_mode = new_mode;
                                        if(new_mode == WSDISPLAYIO_MODE_EMUL) {
                                                chipsfb_restore_palette(sc);
                                                vcons_redraw_screen(ms);
                                        }
                                }
                        }
                        return 0;
        }
        return EPASSTHROUGH;
}

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

        /* 'regular' framebuffer mmap()ing */
        if (offset < sc->memsize) {
                pa = bus_space_mmap(sc->sc_fbt, 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_generic(kauth_cred_get(), KAUTH_GENERIC_ISSUSER,
            NULL) != 0) {
                aprint_normal_dev(&sc->sc_dev, "mmap() rejected.\n");
                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;
        }

#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
chipsfb_init_screen(void *cookie, struct vcons_screen *scr,
    int existing, long *defattr)
{
        struct chipsfb_softc *sc = cookie;
        struct rasops_info *ri = &scr->scr_ri;

        ri->ri_depth = sc->bits_per_pixel;
        ri->ri_width = sc->width;
        ri->ri_height = sc->height;
        ri->ri_stride = sc->width;
        ri->ri_flg = RI_CENTER | RI_FULLCLEAR;

        ri->ri_bits = bus_space_vaddr(sc->sc_fbt, sc->sc_fbh);

#ifdef CHIPSFB_DEBUG
        aprint_debug("addr: %08lx\n", (ulong)ri->ri_bits);
#endif
        if (existing) {
                ri->ri_flg |= RI_CLEAR;
        }

        rasops_init(ri, sc->height/8, sc->width/8);
        ri->ri_caps = WSSCREEN_WSCOLORS;

        rasops_reconfig(ri, sc->height / ri->ri_font->fontheight,
                    sc->width / ri->ri_font->fontwidth);

        ri->ri_hw = scr;
        ri->ri_ops.copyrows = chipsfb_copyrows;
        ri->ri_ops.copycols = chipsfb_copycols;
        ri->ri_ops.eraserows = chipsfb_eraserows;
        ri->ri_ops.erasecols = chipsfb_erasecols;
        ri->ri_ops.cursor = chipsfb_cursor;
        ri->ri_ops.putchar = chipsfb_putchar;
}

#if 0
int
chipsfb_load_font(void *v, void *cookie, struct wsdisplay_font *data)
{

        return 0;
}
#endif

static void
chipsfb_init(struct chipsfb_softc *sc)
{

        chipsfb_wait_idle(sc);

        chipsfb_write_indexed(sc, CT_CONF_INDEX, XR_IO_CONTROL,
            ENABLE_CRTC_EXT | ENABLE_ATTR_EXT);
        chipsfb_write_indexed(sc, CT_CONF_INDEX, XR_ADDR_MAPPING,
            ENABLE_LINEAR);

        /* setup the blitter */
}

static uint32_t
chipsfb_probe_vram(struct chipsfb_softc *sc)
{
        uint32_t ofs = 0x00080000;      /* 512kB */

        /*
         * advance in 0.5MB steps, see if we can read back what we wrote and
         * if what we wrote to 0 is left untouched. Max. fb size is 4MB so
         * we voluntarily stop there.
         */
        chipsfb_write32(sc, 0, 0xf0f0f0f0);
        chipsfb_write32(sc, ofs, 0x0f0f0f0f);
        while ((chipsfb_read32(sc, 0) == 0xf0f0f0f0) &&
            (chipsfb_read32(sc, ofs) == 0x0f0f0f0f) &&
            (ofs < 0x00400000)) {

                ofs += 0x00080000;
                chipsfb_write32(sc, ofs, 0x0f0f0f0f);
        }

        return ofs;
}