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tdvfb.c revision 1.5
      1 /*	$NetBSD: tdvfb.c,v 1.5 2013/01/31 11:57:07 rkujawa Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2012 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Radoslaw Kujawa.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 /*
     32  * A console driver for 3Dfx Voodoo2 (CVG) and 3Dfx Voodoo Graphics (SST-1).
     33  *
     34  * 3Dfx Glide 2.x source code, Linux driver by Ghozlane Toumi, and
     35  * "Voodoo2 Graphics Engine for 3D Game Acceleration" document were used as
     36  * reference. wscons attachment code based mostly on genfb by Michael
     37  * Lorenz.
     38  *
     39  * This driver currently only support boards with ICS GENDAC (which seems to
     40  * be most popular, however at least two different DACs were used with CVG).
     41  *
     42  * TODO (in no particular order):
     43  * - Finally fix 16-bit depth handling on big-endian machines.
     44  * - Expose card to userspace through /dev/3dfx compatible device file
     45  *   (for Glide).
     46  * - Allow mmap'ing of registers through wscons access op.
     47  * - Complete wscons emul ops acceleration support.
     48  * - Add support for others DACs (need hardware).
     49  */
     50 
     51 #include <sys/cdefs.h>
     52 __KERNEL_RCSID(0, "$NetBSD: tdvfb.c,v 1.5 2013/01/31 11:57:07 rkujawa Exp $");
     53 
     54 #include <sys/param.h>
     55 #include <sys/systm.h>
     56 #include <sys/kernel.h>
     57 #include <sys/device.h>
     58 #include <sys/endian.h>
     59 
     60 #include <dev/pci/pcivar.h>
     61 #include <dev/pci/pcireg.h>
     62 #include <dev/pci/pcidevs.h>
     63 #include <dev/pci/pciio.h>
     64 
     65 #include <dev/pci/tdvfbreg.h>
     66 #include <dev/pci/tdvfbvar.h>
     67 
     68 #include <dev/videomode/videomode.h>
     69 #include <dev/pci/wsdisplay_pci.h>
     70 
     71 #include "opt_wsemul.h"
     72 #include "opt_tdvfb.h"
     73 
     74 #define MAXLOOP 4096
     75 /* #define TDVFB_DEBUG 1 */
     76 
     77 static int	tdvfb_match(device_t, cfdata_t, void *);
     78 static void	tdvfb_attach(device_t, device_t, void *);
     79 
     80 static uint32_t	tdvfb_cvg_read(struct tdvfb_softc *sc, uint32_t reg);
     81 static void	tdvfb_cvg_write(struct tdvfb_softc *sc, uint32_t reg,
     82 		    uint32_t val);
     83 static void	tdvfb_cvg_set(struct tdvfb_softc *sc, uint32_t reg,
     84 		    uint32_t bits);
     85 static void	tdvfb_cvg_unset(struct tdvfb_softc *sc, uint32_t reg,
     86 		    uint32_t bits);
     87 static uint8_t	tdvfb_cvg_dac_read(struct tdvfb_softc *sc, uint32_t reg);
     88 static void	tdvfb_cvg_dac_write(struct tdvfb_softc *sc, uint32_t reg,
     89 		    uint32_t val);
     90 static void	tdvfb_wait(struct tdvfb_softc *sc);
     91 
     92 static bool	tdvfb_init(struct tdvfb_softc *sc);
     93 static void	tdvfb_fbiinit_defaults(struct tdvfb_softc *sc);
     94 static size_t	tdvfb_mem_size(struct tdvfb_softc *sc);
     95 
     96 static bool	tdvfb_videomode_set(struct tdvfb_softc *sc);
     97 static void	tdvfb_videomode_dac(struct tdvfb_softc *sc);
     98 
     99 static bool	tdvfb_gendac_detect(struct tdvfb_softc *sc);
    100 static struct tdvfb_dac_timing	tdvfb_gendac_calc_pll(int freq);
    101 static void	tdvfb_gendac_set_cvg_timing(struct tdvfb_softc *sc,
    102 		    struct tdvfb_dac_timing *timing);
    103 static void	tdvfb_gendac_set_vid_timing(struct tdvfb_softc *sc,
    104 		    struct tdvfb_dac_timing *timing);
    105 
    106 static paddr_t	tdvfb_mmap(void *v, void *vs, off_t offset, int prot);
    107 static int	tdvfb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag,
    108 		    struct lwp *l);
    109 static void	tdvfb_init_screen(void *cookie, struct vcons_screen *scr,
    110 		    int existing, long *defattr);
    111 static void	tdvfb_init_palette(struct tdvfb_softc *sc);
    112 /* blitter support */
    113 static void	tdvfb_rectfill(struct tdvfb_softc *sc, int x, int y, int wi,
    114 		    int he, uint32_t color);
    115 static void	tdvfb_bitblt(struct tdvfb_softc *sc, int xs, int ys, int xd,
    116 		    int yd, int wi, int he);
    117 /* accelerated raster ops */
    118 static void	tdvfb_eraserows(void *cookie, int row, int nrows,
    119 		    long fillattr);
    120 static void	tdvfb_copyrows(void *cookie, int srcrow, int dstrow, int nrows);
    121 
    122 CFATTACH_DECL_NEW(tdvfb, sizeof(struct tdvfb_softc),
    123     tdvfb_match, tdvfb_attach, NULL, NULL);
    124 
    125 struct wsdisplay_accessops tdvfb_accessops = {
    126 	tdvfb_ioctl,
    127 	tdvfb_mmap,
    128 	NULL,	/* alloc_screen */
    129 	NULL,	/* free_screen */
    130 	NULL,	/* show_screen */
    131 	NULL, 	/* load_font */
    132 	NULL,	/* pollc */
    133 	NULL	/* scroll */
    134 };
    135 
    136 static int
    137 tdvfb_match(device_t parent, cfdata_t match, void *aux)
    138 {
    139 	const struct pci_attach_args *pa = (const struct pci_attach_args *)aux;
    140 
    141 	if ((PCI_VENDOR(pa->pa_id) == PCI_VENDOR_3DFX) &&
    142 	    (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_3DFX_VOODOO2))
    143 		return 100;
    144 	if ((PCI_VENDOR(pa->pa_id) == PCI_VENDOR_3DFX) &&
    145 	    (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_3DFX_VOODOO))
    146 		return 100;
    147 
    148 	return 0;
    149 }
    150 
    151 static void
    152 tdvfb_attach(device_t parent, device_t self, void *aux)
    153 {
    154 	struct tdvfb_softc *sc = device_private(self);
    155 	struct wsemuldisplaydev_attach_args ws_aa;
    156 	struct rasops_info *ri;
    157 	const struct pci_attach_args *pa = aux;
    158 	pcireg_t screg;
    159 	bool console;
    160 	long defattr;
    161 
    162 #ifdef TDVFB_CONSOLE
    163 	console = true;
    164 #else
    165 	console = false;
    166 #endif
    167 
    168 	sc->sc_pc = pa->pa_pc;
    169 	sc->sc_pcitag = pa->pa_tag;
    170 	sc->sc_dev = self;
    171 
    172 	if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_3DFX_VOODOO2)
    173 		sc->sc_voodootype = TDV_VOODOO_2;
    174 	else
    175 		sc->sc_voodootype = TDV_VOODOO_1;
    176 
    177 	screg = pci_conf_read(sc->sc_pc, sc->sc_pcitag,
    178 	    PCI_COMMAND_STATUS_REG);
    179 	screg |= PCI_COMMAND_MEM_ENABLE;
    180 	pci_conf_write(sc->sc_pc, sc->sc_pcitag, PCI_COMMAND_STATUS_REG,
    181 	    screg);
    182 
    183 	pci_aprint_devinfo(pa, NULL);
    184 
    185 	/* map the BAR */
    186 	if (pci_mapreg_map(pa, TDV_MM_BAR, PCI_MAPREG_TYPE_MEM,
    187 	    BUS_SPACE_MAP_LINEAR, &sc->sc_cvgt, &sc->sc_cvgh,
    188 	    &sc->sc_cvg_pa, 0) != 0 ) {
    189 		aprint_error_dev(sc->sc_dev, "unable to map CVG BAR");
    190 		return;
    191 	}
    192 
    193 	/* Map the framebuffer. */
    194 	if (bus_space_subregion(sc->sc_cvgt, sc->sc_cvgh, TDV_OFF_FB,
    195 	    TDV_FB_SIZE, &sc->sc_fbh)) {
    196 		aprint_error_dev(sc->sc_dev, "unable to map the framebuffer");
    197 	}
    198 
    199 	aprint_normal_dev(sc->sc_dev, "registers at 0x%08x, fb at 0x%08x\n",
    200 	    (uint32_t) sc->sc_cvg_pa, (uint32_t) sc->sc_cvg_pa + TDV_OFF_FB);
    201 
    202 	/* Do the low level setup. */
    203 	if (!tdvfb_init(sc)) {
    204 		aprint_error_dev(sc->sc_dev, "could not initialize CVG\n");
    205 		return;
    206 	}
    207 
    208 	/*
    209 	 * The card is alive now, let's check how much framebuffer memory
    210 	 * do we have.
    211 	 */
    212 	sc->sc_memsize = tdvfb_mem_size(sc);
    213 
    214 	aprint_normal_dev(sc->sc_dev, "%d MB framebuffer memory present\n",
    215 	    sc->sc_memsize / 1024 / 1024);
    216 
    217 	/* Select video mode, 800x600 32bpp 60Hz by default... */
    218 	sc->sc_width = 800;
    219 	sc->sc_height = 600;
    220 #if BYTE_ORDER == BIG_ENDIAN
    221 	sc->sc_bpp = 32;	/* XXX: 16 would allow blitter use. */
    222 #else
    223 	sc->sc_bpp = 16;
    224 #endif
    225 	sc->sc_linebytes = 1024 * (sc->sc_bpp / 8);
    226 	sc->sc_videomode = pick_mode_by_ref(sc->sc_width, sc->sc_height, 60);
    227 
    228 	aprint_normal_dev(sc->sc_dev, "setting %dx%d %d bpp resolution\n",
    229 	    sc->sc_width, sc->sc_height, sc->sc_bpp);
    230 
    231 	tdvfb_videomode_set(sc);
    232 
    233 	sc->sc_defaultscreen_descr = (struct wsscreen_descr){
    234 		"default",
    235 		0, 0,
    236 		NULL,
    237 		8, 16,
    238 		WSSCREEN_WSCOLORS | WSSCREEN_HILIT,
    239 		NULL
    240 	};
    241 	sc->sc_screens[0] = &sc->sc_defaultscreen_descr;
    242 	sc->sc_screenlist = (struct wsscreen_list){1, sc->sc_screens};
    243 	sc->sc_mode = WSDISPLAYIO_MODE_EMUL;
    244 
    245 	vcons_init(&sc->vd, sc, &sc->sc_defaultscreen_descr,
    246 	    &tdvfb_accessops);
    247 	sc->vd.init_screen = tdvfb_init_screen;
    248 
    249 	ri = &sc->sc_console_screen.scr_ri;
    250 
    251 	tdvfb_init_palette(sc);
    252 
    253 	if (console) {
    254 		vcons_init_screen(&sc->vd, &sc->sc_console_screen, 1,
    255 		    &defattr);
    256 
    257 		sc->sc_console_screen.scr_flags |= VCONS_SCREEN_IS_STATIC |
    258 		    VCONS_DONT_READ;
    259 		vcons_redraw_screen(&sc->sc_console_screen);
    260 
    261 		sc->sc_defaultscreen_descr.textops = &ri->ri_ops;
    262 		sc->sc_defaultscreen_descr.capabilities = ri->ri_caps;
    263 		sc->sc_defaultscreen_descr.nrows = ri->ri_rows;
    264 		sc->sc_defaultscreen_descr.ncols = ri->ri_cols;
    265 
    266 		wsdisplay_cnattach(&sc->sc_defaultscreen_descr, ri, 0, 0,
    267 		    defattr);
    268 		vcons_replay_msgbuf(&sc->sc_console_screen);
    269 	} else if (sc->sc_console_screen.scr_ri.ri_rows == 0) {
    270 		vcons_init_screen(&sc->vd, &sc->sc_console_screen, 1,
    271 		    &defattr);
    272 	}
    273 
    274 	ws_aa.console = console;
    275 	ws_aa.scrdata = &sc->sc_screenlist;
    276 	ws_aa.accessops = &tdvfb_accessops;
    277 	ws_aa.accesscookie = &sc->vd;
    278 
    279 	config_found(sc->sc_dev, &ws_aa, wsemuldisplaydevprint);
    280 }
    281 
    282 static void
    283 tdvfb_init_palette(struct tdvfb_softc *sc)
    284 {
    285 	int i, j;
    286 
    287 	j = 0;
    288 	for (i = 0; i < 256; i++) {
    289 		sc->sc_cmap_red[i] = rasops_cmap[j];
    290 		sc->sc_cmap_green[i] = rasops_cmap[j + 1];
    291 		sc->sc_cmap_blue[i] = rasops_cmap[j + 2];
    292 		j += 3;
    293 	}
    294 }
    295 
    296 static void
    297 tdvfb_init_screen(void *cookie, struct vcons_screen *scr, int existing,
    298     long *defattr)
    299 {
    300 	struct tdvfb_softc *sc = cookie;
    301 	struct rasops_info *ri = &scr->scr_ri;
    302 
    303 	wsfont_init();
    304 
    305 	ri->ri_depth = sc->sc_bpp;
    306 	ri->ri_width = sc->sc_width;
    307 	ri->ri_height = sc->sc_height;
    308 	ri->ri_stride = sc->sc_linebytes;
    309 	ri->ri_flg = RI_CENTER;
    310 
    311 #if BYTE_ORDER == BIG_ENDIAN
    312 #if 0 /* XXX: not yet :( */
    313 	if (sc->sc_bpp == 16)
    314 		ri->ri_flg |= RI_BITSWAP;
    315 #endif
    316 #endif
    317 
    318 	ri->ri_bits = (char *) bus_space_vaddr(sc->sc_cvgt, sc->sc_fbh);
    319 #ifdef TDVFB_DEBUG
    320 	aprint_normal_dev(sc->sc_dev, "fb handle: %lx, ri_bits: %p\n", sc->sc_fbh, ri->ri_bits);
    321 #endif /* TDVFB_DEBUG */
    322 
    323 	scr->scr_flags |= VCONS_DONT_READ;
    324 
    325 	rasops_init(ri, 0, 0);
    326 	ri->ri_caps = WSSCREEN_WSCOLORS;
    327 	rasops_reconfig(ri, sc->sc_height / ri->ri_font->fontheight,
    328 	    sc->sc_width / ri->ri_font->fontwidth);
    329 
    330 	ri->ri_hw = scr;
    331 
    332 	/* If we are a Voodoo2 and running in 16 bits try to use blitter. */
    333 	if ((sc->sc_voodootype == TDV_VOODOO_2) && (sc->sc_bpp == 16)) {
    334 		aprint_normal_dev(sc->sc_dev, "using CVG blitter\n");
    335 		ri->ri_ops.eraserows = tdvfb_eraserows;
    336 		ri->ri_ops.copyrows = tdvfb_copyrows;
    337 	}
    338 }
    339 
    340 static bool
    341 tdvfb_videomode_set(struct tdvfb_softc *sc)
    342 {
    343 	uint32_t fbiinit1, fbiinit5, fbiinit6, lfbmode;
    344 	uint16_t vbackporch, vsyncon, vsyncoff;
    345 	uint16_t hbackporch, hsyncon, hsyncoff;
    346 	uint16_t yheight, xwidth;
    347 
    348 	yheight = sc->sc_videomode->vdisplay;
    349 	xwidth = sc->sc_videomode->hdisplay;
    350 
    351 	vbackporch = sc->sc_videomode->vtotal - sc->sc_videomode->vsync_end;
    352 	hbackporch = sc->sc_videomode->htotal - sc->sc_videomode->hsync_end;
    353 
    354 	vsyncon = sc->sc_videomode->vsync_end - sc->sc_videomode->vsync_start;
    355 	hsyncon = sc->sc_videomode->hsync_end - sc->sc_videomode->hsync_start;
    356 
    357 	vsyncoff = sc->sc_videomode->vtotal - vsyncon;
    358 	hsyncoff = sc->sc_videomode->htotal - hsyncon;
    359 #ifdef TDVFB_DEBUG
    360 	aprint_normal_dev(sc->sc_dev,
    361 	    "xy %d %d hbp %d vbp %d, hson %d, hsoff %d, vson %d, vsoff %d\n",
    362 	    xwidth, yheight, hbackporch, vbackporch, hsyncon, hsyncoff,
    363 	    vsyncon, vsyncoff);
    364 #endif /* TDVFB_DEBUG */
    365 
    366 	sc->vid_timing = tdvfb_gendac_calc_pll(sc->sc_videomode->dot_clock);
    367 
    368 	if(sc->sc_voodootype == TDV_VOODOO_2)
    369 		sc->sc_x_tiles = (sc->sc_videomode->hdisplay + 63 ) / 64 * 2;
    370 	else
    371 		sc->sc_x_tiles = (sc->sc_videomode->hdisplay + 63 ) / 64;
    372 
    373 	tdvfb_cvg_write(sc, TDV_OFF_NOPCMD, 0);
    374 	tdvfb_wait(sc);
    375 
    376 	/* enable writing to fbiinit regs, reset, disable DRAM refresh */
    377 	pci_conf_write(sc->sc_pc, sc->sc_pcitag, TDV_INITENABLE_REG,
    378 	    TDV_INITENABLE_EN_INIT);
    379 	tdvfb_cvg_set(sc, TDV_OFF_FBIINIT1, TDV_FBIINIT1_VIDEO_RST);
    380 	tdvfb_cvg_set(sc, TDV_OFF_FBIINIT0, TDV_FBIINIT0_FBI_RST |
    381 	    TDV_FBIINIT0_FIFO_RST);
    382 	tdvfb_cvg_unset(sc, TDV_OFF_FBIINIT2, TDV_FBIINIT2_DRAM_REFR);
    383 	tdvfb_wait(sc);
    384 
    385 	/* program video timings into CVG/SST-1*/
    386 	tdvfb_cvg_write(sc, TDV_OFF_VDIMENSIONS, yheight << 16 | (xwidth - 1));
    387 	tdvfb_cvg_write(sc, TDV_OFF_BACKPORCH, vbackporch << 16 |
    388 	    (hbackporch - 2));
    389 	tdvfb_cvg_write(sc, TDV_OFF_HSYNC, hsyncoff << 16 | (hsyncon - 1));
    390 	tdvfb_cvg_write(sc, TDV_OFF_VSYNC, vsyncoff << 16 | vsyncon);
    391 
    392 	tdvfb_videomode_dac(sc);
    393 
    394 	fbiinit1 = ((tdvfb_cvg_read(sc, TDV_OFF_FBIINIT1) &
    395 	    TDV_FBIINIT1_VIDMASK) |
    396 	    TDV_FBIINIT1_DR_DATA |
    397 	    TDV_FBIINIT1_DR_BLANKING |
    398 	    TDV_FBIINIT1_DR_HVSYNC |
    399 	    TDV_FBIINIT1_DR_DCLK |
    400 	    TDV_FBIINIT1_IN_VCLK_2X );
    401 
    402 	if (sc->sc_voodootype == TDV_VOODOO_2) {
    403 		fbiinit1 |= ((sc->sc_x_tiles & 0x20) >> 5)
    404 		    << TDV_FBIINIT1_TILES_X_MSB | ((sc->sc_x_tiles & 0x1e) >> 1)
    405 		    << TDV_FBIINIT1_TILES_X;
    406 		fbiinit6 = (sc->sc_x_tiles & 0x1) << TDV_FBIINIT6_TILES_X_LSB;
    407 	} else
    408 		fbiinit1 |= sc->sc_x_tiles  << TDV_FBIINIT1_TILES_X;
    409 
    410 	fbiinit1 |= TDV_FBIINIT1_VCLK_2X << TDV_FBIINIT1_VCLK_SRC;
    411 
    412 	if (sc->sc_voodootype == TDV_VOODOO_2) {
    413 		fbiinit5 = tdvfb_cvg_read(sc, TDV_OFF_FBIINIT5)
    414 		    & TDV_FBIINIT5_VIDMASK;
    415 		if (sc->sc_videomode->flags & VID_PHSYNC)
    416 			fbiinit5 |= TDV_FBIINIT5_PHSYNC;
    417 		if (sc->sc_videomode->flags & VID_PVSYNC)
    418 			fbiinit5 |= TDV_FBIINIT5_PVSYNC;
    419 	}
    420 	tdvfb_cvg_write(sc, TDV_OFF_FBIINIT1, fbiinit1);
    421 	if (sc->sc_voodootype == TDV_VOODOO_2) {
    422 		tdvfb_cvg_write(sc, TDV_OFF_FBIINIT6, fbiinit6);
    423 		tdvfb_cvg_write(sc, TDV_OFF_FBIINIT5, fbiinit5);
    424 	}
    425 	tdvfb_wait(sc);
    426 
    427 	/* unreset, enable DRAM refresh */
    428 	tdvfb_cvg_unset(sc, TDV_OFF_FBIINIT1, TDV_FBIINIT1_VIDEO_RST);
    429 	tdvfb_cvg_unset(sc, TDV_OFF_FBIINIT0, TDV_FBIINIT0_FBI_RST |
    430 	    TDV_FBIINIT0_FIFO_RST);
    431 	tdvfb_cvg_set(sc, TDV_OFF_FBIINIT2, TDV_FBIINIT2_DRAM_REFR);
    432 	/* diable access to FBIINIT regs */
    433 	pci_conf_write(sc->sc_pc, sc->sc_pcitag, TDV_INITENABLE_REG,
    434 	    TDV_INITENABLE_EN_FIFO);
    435 	tdvfb_wait(sc);
    436 
    437 	if (sc->sc_bpp == 16)
    438 		lfbmode = TDV_LFBMODE_565;
    439 	else if (sc->sc_bpp == 32)
    440 		lfbmode = TDV_LFBMODE_8888;
    441 	else
    442 		return false;
    443 
    444 #if BYTE_ORDER == BIG_ENDIAN
    445 	lfbmode |= TDV_LFBMODE_BSW_WR | TDV_LFBMODE_BSW_RD;
    446 #endif
    447 
    448 	tdvfb_cvg_write(sc, TDV_OFF_LFBMODE, lfbmode);
    449 
    450 	return true;
    451 }
    452 
    453 /*
    454  * Update DAC parameters for selected video mode.
    455  */
    456 static void
    457 tdvfb_videomode_dac(struct tdvfb_softc *sc)
    458 {
    459 	uint32_t fbiinit2, fbiinit3;
    460 
    461 	/* remember current FBIINIT settings */
    462 	fbiinit2 = tdvfb_cvg_read(sc, TDV_OFF_FBIINIT2);
    463 	fbiinit3 = tdvfb_cvg_read(sc, TDV_OFF_FBIINIT3);
    464 
    465 	/* remap DAC */
    466 	pci_conf_write(sc->sc_pc, sc->sc_pcitag, TDV_INITENABLE_REG,
    467 	    TDV_INITENABLE_EN_INIT | TDV_INITENABLE_REMAPDAC);
    468 
    469 	tdvfb_cvg_dac_write(sc, TDV_GENDAC_CMD, TDV_GENDAC_CMD_16BITS);
    470 
    471 	tdvfb_gendac_set_vid_timing(sc, &(sc->vid_timing));
    472 
    473 	/* disable remapping */
    474 	pci_conf_write(sc->sc_pc, sc->sc_pcitag, TDV_INITENABLE_REG,
    475 	    TDV_INITENABLE_EN_INIT);
    476 	/* restore */
    477 	tdvfb_cvg_write(sc, TDV_OFF_FBIINIT2, fbiinit2);
    478 	tdvfb_cvg_write(sc, TDV_OFF_FBIINIT2, fbiinit3);
    479 }
    480 
    481 /*
    482  * Check how much memory do we have. Actually, Voodoo1/2 has separate
    483  * framebuffer and texture memory. This function only checks for framebuffer
    484  * memory. Texture memory ramains unused.
    485  */
    486 static size_t
    487 tdvfb_mem_size(struct tdvfb_softc *sc)
    488 {
    489 	size_t mem_size;
    490 	uint32_t vram_test4, vram_test2;
    491 
    492 	bus_space_write_4(sc->sc_cvgt, sc->sc_fbh, 0, 0x11aabbaa);
    493 	bus_space_write_4(sc->sc_cvgt, sc->sc_fbh, 0x100000, 0x22aabbaa);
    494 	bus_space_write_4(sc->sc_cvgt, sc->sc_fbh, 0x200000, 0x44aabbaa);
    495 
    496 	vram_test4 = bus_space_read_4(sc->sc_cvgt, sc->sc_fbh, 0x400000);
    497 	vram_test2 = bus_space_read_4(sc->sc_cvgt, sc->sc_fbh, 0x200000);
    498 
    499 	if (vram_test4 == 0x44aabbaa)
    500 		mem_size = 4*1024*1024;
    501 	else if (vram_test2 == 0x22aabbaa) {
    502 		mem_size = 2*1024*1024;
    503 	} else
    504 		mem_size = 1*1024*1024;
    505 
    506 	return mem_size;
    507 }
    508 
    509 /* do the low level init of Voodoo board */
    510 static bool
    511 tdvfb_init(struct tdvfb_softc *sc)
    512 {
    513 	/* undocumented - found in glide code */
    514 	pci_conf_write(sc->sc_pc, sc->sc_pcitag, TDV_VCLK_DISABLE_REG, 0);
    515 	/* allow write to hardware initialization registers */
    516 	pci_conf_write(sc->sc_pc, sc->sc_pcitag, TDV_INITENABLE_REG,
    517 	    TDV_INITENABLE_EN_INIT);
    518 
    519 	/* reset the board */
    520 	tdvfb_cvg_set(sc, TDV_OFF_FBIINIT1, TDV_FBIINIT1_VIDEO_RST);
    521 	tdvfb_wait(sc);
    522 	tdvfb_cvg_set(sc, TDV_OFF_FBIINIT0, TDV_FBIINIT0_FBI_RST |
    523 	    TDV_FBIINIT0_FIFO_RST);
    524 	tdvfb_wait(sc);
    525 
    526 	/* disable video RAM refresh */
    527 	tdvfb_cvg_unset(sc, TDV_OFF_FBIINIT2, TDV_FBIINIT2_DRAM_REFR);
    528 	tdvfb_wait(sc);
    529 
    530 	/* on voodoo1 I had to read FBIINIT2 before remapping,
    531 	 * otherwise weird things were happening, on v2 it works just fine */
    532 	/* tdvfb_cvg_read(sc, TDV_OFF_FBIINIT2); */
    533 
    534 	/* remap DAC */
    535 	pci_conf_write(sc->sc_pc, sc->sc_pcitag, TDV_INITENABLE_REG,
    536 	    TDV_INITENABLE_EN_INIT | TDV_INITENABLE_REMAPDAC);
    537 
    538 	/* detect supported DAC, TODO: we really should support other DACs */
    539 	if(!tdvfb_gendac_detect(sc)) {
    540 		aprint_error_dev(sc->sc_dev, "could not detect ICS GENDAC\n");
    541 		return false;
    542 	}
    543 
    544 	/* calculate PLL used to drive the chips (graphics clock) */
    545 	if(sc->sc_voodootype == TDV_VOODOO_2)
    546 		sc->cvg_timing = tdvfb_gendac_calc_pll(TDV_CVG_CLK);
    547 	else
    548 		sc->cvg_timing = tdvfb_gendac_calc_pll(TDV_SST_CLK);
    549 
    550 	/* set PLL for gfx clock */
    551 	tdvfb_gendac_set_cvg_timing(sc, &(sc->cvg_timing));
    552 
    553 	/* don't remap the DAC anymore */
    554 	pci_conf_write(sc->sc_pc, sc->sc_pcitag, TDV_INITENABLE_REG,
    555 	    TDV_INITENABLE_EN_INIT | TDV_INITENABLE_EN_FIFO);
    556 
    557 	/* set FBIINIT registers to some default values that make sense */
    558 	tdvfb_fbiinit_defaults(sc);
    559 
    560 	pci_conf_write(sc->sc_pc, sc->sc_pcitag, TDV_INITENABLE_REG,
    561 	    TDV_INITENABLE_EN_FIFO);
    562 	pci_conf_write(sc->sc_pc, sc->sc_pcitag, TDV_VCLK_ENABLE_REG, 0);
    563 
    564 	return true;
    565 }
    566 
    567 static void
    568 tdvfb_fbiinit_defaults(struct tdvfb_softc *sc)
    569 {
    570 	uint32_t fbiinit0, fbiinit1, fbiinit2, fbiinit3, fbiinit4, fbiinit6;
    571 
    572 	fbiinit0 = TDV_FBIINIT0_VGA_PASS; /* disable VGA passthrough */
    573 	fbiinit1 = /*TDV_FBIINIT1_PCIWAIT |*/ /* one wait state for PCI write */
    574 	    TDV_FBIINIT1_LFB_EN |	  /* enable lfb reads */
    575 	    TDV_FBIINIT1_VIDEO_RST | 	  /* video timing reset */
    576 	    10 << TDV_FBIINIT1_TILES_X |   /* tiles x/horizontal */
    577 	    TDV_FBIINIT1_VCLK_2X << TDV_FBIINIT1_VCLK_SRC ;
    578 
    579 	fbiinit2 = TDV_FBIINIT2_SWB_ALG |/* swap buffer use DAC sync */
    580 	    TDV_FBIINIT2_FAST_RAS |	  /* fast RAS read */
    581 	    TDV_FBIINIT2_DRAM_OE |	  /* enable DRAM OE */
    582 	    TDV_FBIINIT2_DRAM_REFR |	  /* enable DRAM refresh */
    583 	    TDV_FBIINIT2_FIFO_RDA |	  /* FIFO read ahead */
    584 	    TDV_FBIINIT2_DRAM_REF16 << TDV_FBIINIT2_DRAM_REFLD; /* 16 ms */
    585 
    586 	fbiinit3 = TDV_FBIINIT3_TREX_DIS; /* disable texture mapping */
    587 
    588 	fbiinit4 = /*TDV_FBIINIT4_PCIWAIT|*/ /* one wait state for PCI write */
    589 	    TDV_FBIINIT4_LFB_RDA;	  /* lfb read ahead */
    590 
    591 	fbiinit6 = 0;
    592 #ifdef TDVFB_DEBUG
    593 	aprint_normal("fbiinit: 0 %x, 1 %x, 2 %x, 3 %x, 4 %x, 6 %x\n",
    594 	    fbiinit0, fbiinit1, fbiinit2, fbiinit3, fbiinit4, fbiinit6);
    595 #endif /* TDVFB_DEBUG */
    596 	tdvfb_cvg_write(sc, TDV_OFF_FBIINIT0, fbiinit0);
    597 	tdvfb_wait(sc);
    598 	tdvfb_cvg_write(sc, TDV_OFF_FBIINIT1, fbiinit1);
    599 	tdvfb_wait(sc);
    600 	tdvfb_cvg_write(sc, TDV_OFF_FBIINIT2, fbiinit2);
    601 	tdvfb_wait(sc);
    602 	tdvfb_cvg_write(sc, TDV_OFF_FBIINIT3, fbiinit3);
    603 	tdvfb_wait(sc);
    604 	tdvfb_cvg_write(sc, TDV_OFF_FBIINIT4, fbiinit4);
    605 	tdvfb_wait(sc);
    606 	if (sc->sc_voodootype == TDV_VOODOO_2) {
    607 		tdvfb_cvg_write(sc, TDV_OFF_FBIINIT6, fbiinit6);
    608 		tdvfb_wait(sc);
    609 	}
    610 }
    611 
    612 static void
    613 tdvfb_gendac_set_vid_timing(struct tdvfb_softc *sc,
    614     struct tdvfb_dac_timing *timing)
    615 {
    616 	uint8_t pllreg;
    617 
    618 	tdvfb_cvg_dac_write(sc, TDV_GENDAC_PLLRD, TDV_GENDAC_PLL_CTRL);
    619 	pllreg = tdvfb_cvg_dac_read(sc, TDV_GENDAC_PLLDATA);
    620 
    621 	/* write the timing for gfx clock into "slot" 0 */
    622 	tdvfb_cvg_dac_write(sc, TDV_GENDAC_PLLWR, TDV_GENDAC_PLL_0);
    623 	tdvfb_cvg_dac_write(sc, TDV_GENDAC_PLLDATA, timing->m);
    624 	tdvfb_cvg_dac_write(sc, TDV_GENDAC_PLLDATA, timing->n);
    625 	/* select "slot" 0 for output */
    626 	tdvfb_cvg_dac_write(sc, TDV_GENDAC_PLLWR, TDV_GENDAC_PLL_CTRL);
    627 	tdvfb_cvg_dac_write(sc, TDV_GENDAC_PLLDATA,
    628 	    (pllreg & TDV_GENDAC_VIDPLLMASK) | TDV_GENDAC_PLL_VIDCLK |
    629 	    TDV_GENDAC_PLL_VIDCLK0);
    630 	tdvfb_wait(sc);
    631 	tdvfb_wait(sc);
    632 #ifdef TDVFB_DEBUG
    633 	tdvfb_cvg_dac_write(sc, TDV_GENDAC_PLLRD, TDV_GENDAC_PLL_0);
    634 	pllreg = tdvfb_cvg_dac_read(sc, TDV_GENDAC_PLLDATA);
    635 	aprint_normal("vid read again: %d\n", pllreg);
    636 	pllreg = tdvfb_cvg_dac_read(sc, TDV_GENDAC_PLLDATA);
    637 	aprint_normal("vid read again: %d\n", pllreg);
    638 #endif /* TDVFB_DEBUG */
    639 }
    640 
    641 static void
    642 tdvfb_gendac_set_cvg_timing(struct tdvfb_softc *sc,
    643     struct tdvfb_dac_timing *timing)
    644 {
    645 	uint8_t pllreg;
    646 
    647 	tdvfb_cvg_dac_write(sc, TDV_GENDAC_PLLRD, TDV_GENDAC_PLL_CTRL);
    648 	pllreg = tdvfb_cvg_dac_read(sc, TDV_GENDAC_PLLDATA);
    649 
    650 	/* write the timing for gfx clock into "slot" A */
    651 	tdvfb_cvg_dac_write(sc, TDV_GENDAC_PLLWR, TDV_GENDAC_PLL_A);
    652 	tdvfb_cvg_dac_write(sc, TDV_GENDAC_PLLDATA, timing->m);
    653 	tdvfb_cvg_dac_write(sc, TDV_GENDAC_PLLDATA, timing->n);
    654 	/* select "slot" A for output */
    655 	tdvfb_cvg_dac_write(sc, TDV_GENDAC_PLLWR, TDV_GENDAC_PLL_CTRL);
    656 	tdvfb_cvg_dac_write(sc, TDV_GENDAC_PLLDATA,
    657 	    (pllreg & TDV_GENDAC_CVGPLLMASK) | TDV_GENDAC_PLL_CVGCLKA);
    658 #ifdef TDVFB_DEBUG
    659 	tdvfb_cvg_dac_write(sc, TDV_GENDAC_PLLRD, TDV_GENDAC_PLL_A);
    660 	pllreg = tdvfb_cvg_dac_read(sc, TDV_GENDAC_PLLDATA);
    661 	aprint_normal("read again: %d\n", pllreg);
    662 	pllreg = tdvfb_cvg_dac_read(sc, TDV_GENDAC_PLLDATA);
    663 	aprint_normal("read again: %d\n", pllreg);
    664 #endif /* TDVFB_DEBUG */
    665 	tdvfb_wait(sc);
    666 }
    667 
    668 static struct tdvfb_dac_timing
    669 tdvfb_gendac_calc_pll(int freq)
    670 {
    671 	int n1, n2;
    672 	int m, mdbl;
    673 	int best_m, best_n1, best_error;
    674 	int fout;
    675 	struct tdvfb_dac_timing timing;
    676 
    677 	best_m = -1; best_n1 = -1;
    678 
    679 	/* select highest possible n2, check n2 * fCLK < TDV_GENDAC_MAXVCO */
    680 	for (n2 = TDV_GENDAC_MAX_N2; n2 >= TDV_GENDAC_MIN_N2; n2--) {
    681 		if ((freq * (1 << n2)) < TDV_GENDAC_MAXVCO)
    682 			break;
    683 	}
    684 
    685 	best_error = freq;
    686 
    687 	/*
    688 	 * m+2	    2^n2 * fOUT
    689 	 * ----  =  -----------
    690 	 * n1+2        fREF
    691 	 */
    692 	for (n1 = TDV_GENDAC_MIN_N1; n1 <= TDV_GENDAC_MAX_N1; n1++) {
    693 		/* loop mostly inspired by Linux driver */
    694 		mdbl = (2 * freq * (1 << n2)*(n1 + 2)) / TDV_GENDAC_REFFREQ - 4;
    695 		if (mdbl % 2)
    696 			m = mdbl/2+1;
    697 		else
    698 			m = mdbl/2;
    699 
    700 		if(m > TDV_GENDAC_MAX_M)
    701 			break;
    702 
    703 		fout = (TDV_GENDAC_REFFREQ * (m + 2)) / ((1 << n2) * (n1 + 2));
    704 		if ((abs(fout - freq) < best_error) && (m > 0)) {
    705 			best_n1 = n1;
    706 			best_m = m;
    707 			best_error = abs(fout - freq);
    708 			if (200*best_error < freq) break;
    709 		}
    710 
    711 	}
    712 
    713 	fout = (TDV_GENDAC_REFFREQ * (best_m + 2)) / ((1 << n2) * (best_n1 + 2));
    714 	timing.m = best_m;
    715 	timing.n = (n2 << 5) | best_n1;
    716 	timing.fout = fout;
    717 
    718 #ifdef TDVFB_DEBUG
    719 	aprint_normal("tdvfb_gendac_calc_pll ret: m %d, n %d, fout %d kHz\n",
    720 	    timing.m, timing.n, timing.fout);
    721 #endif /* TDVFB_DEBUG */
    722 
    723 	return timing;
    724 }
    725 
    726 static bool
    727 tdvfb_gendac_detect(struct tdvfb_softc *sc)
    728 {
    729 	uint8_t m_f1, m_f7, m_fb;
    730 	uint8_t n_f1, n_f7, n_fb;
    731 
    732 	tdvfb_cvg_dac_write(sc, TDV_GENDAC_PLLRD, 0x1);
    733 	m_f1 = tdvfb_cvg_dac_read(sc, TDV_GENDAC_PLLDATA);
    734 	n_f1 = tdvfb_cvg_dac_read(sc, TDV_GENDAC_PLLDATA);
    735 	tdvfb_cvg_dac_write(sc, TDV_GENDAC_PLLRD, 0x7);
    736 	m_f7 = tdvfb_cvg_dac_read(sc, TDV_GENDAC_PLLDATA);
    737 	n_f7 = tdvfb_cvg_dac_read(sc, TDV_GENDAC_PLLDATA);
    738 	tdvfb_cvg_dac_write(sc, TDV_GENDAC_PLLRD, 0xB);
    739 	m_fb = tdvfb_cvg_dac_read(sc, TDV_GENDAC_PLLDATA);
    740 	n_fb = tdvfb_cvg_dac_read(sc, TDV_GENDAC_PLLDATA);
    741 
    742 	if( (m_f1 == TDV_GENDAC_DFLT_F1_M) &&
    743 	    (n_f1 == TDV_GENDAC_DFLT_F1_N) &&
    744 	    (m_f7 == TDV_GENDAC_DFLT_F7_M) &&
    745 	    (n_f7 == TDV_GENDAC_DFLT_F7_N) &&
    746 	    (n_fb == TDV_GENDAC_DFLT_FB_N) &&
    747 	    (n_fb == TDV_GENDAC_DFLT_FB_N) ) {
    748 		aprint_normal_dev(sc->sc_dev, "ICS 5342 GENDAC\n");
    749 		return true;
    750 	}
    751 
    752 	return false;
    753 }
    754 
    755 static void
    756 tdvfb_wait(struct tdvfb_softc *sc)
    757 {
    758 	uint32_t x, cnt;
    759 	cnt = 0;
    760 	for (x = 0; x < MAXLOOP; x++) {
    761 		if (tdvfb_cvg_read(sc, TDV_OFF_STATUS) & TDV_STATUS_FBI_BUSY)
    762 			cnt = 0;
    763 		else
    764 			cnt++;
    765 
    766 		if (cnt >= 5)	/* Voodoo2 specs suggest at least 3 */
    767 			break;
    768 	}
    769 
    770 	if (x == MAXLOOP)
    771 		/*
    772 		 * The console probably isn't working now anyway, so maybe
    773 		 * let's panic... At least it will drop into ddb if some other
    774 		 * device a console.
    775 		 */
    776 		panic("tdvfb is stuck!\n");
    777 }
    778 
    779 static uint32_t
    780 tdvfb_cvg_read(struct tdvfb_softc *sc, uint32_t reg)
    781 {
    782 	uint32_t rv;
    783 	rv = bus_space_read_4(sc->sc_cvgt, sc->sc_cvgh, reg);
    784 #ifdef TDVFB_DEBUG_REGS
    785 	aprint_normal("cvg_read val %x from reg %x\n", rv, reg);
    786 #endif /* TDVFB_DEBUG_REGS */
    787 	return rv;
    788 }
    789 
    790 static void
    791 tdvfb_cvg_write(struct tdvfb_softc *sc, uint32_t reg, uint32_t val)
    792 {
    793 #ifdef TDVFB_DEBUG_REGS
    794 	aprint_normal("cvg_write val %x to reg %x\n", val, reg);
    795 #endif /* TDVFB_DEBUG_REGS */
    796 	bus_space_write_4(sc->sc_cvgt, sc->sc_cvgh, reg, val);
    797 }
    798 
    799 static void
    800 tdvfb_cvg_set(struct tdvfb_softc *sc, uint32_t reg, uint32_t bits)
    801 {
    802 	uint32_t v;
    803 	v = tdvfb_cvg_read(sc, reg) | bits;
    804 	tdvfb_cvg_write(sc, reg, v);
    805 }
    806 
    807 static void
    808 tdvfb_cvg_unset(struct tdvfb_softc *sc, uint32_t reg, uint32_t bits)
    809 {
    810 	uint32_t v;
    811 	v = tdvfb_cvg_read(sc, reg) & ~bits;
    812 	tdvfb_cvg_write(sc, reg, v);
    813 }
    814 
    815 static uint8_t
    816 tdvfb_cvg_dac_read(struct tdvfb_softc *sc, uint32_t reg)
    817 {
    818 	uint32_t rv;
    819 
    820 	tdvfb_cvg_dac_write(sc, reg, TDV_DAC_DATA_READ);
    821 
    822 	rv = tdvfb_cvg_read(sc, TDV_OFF_DAC_READ);
    823 #ifdef TDVFB_DEBUG_REGS
    824 	aprint_normal("cvg_dac_read val %x from reg %x\n", rv, reg);
    825 #endif /* TDVFB_DEBUG_REGS */
    826 	return rv & 0xFF;
    827 }
    828 
    829 static void
    830 tdvfb_cvg_dac_write(struct tdvfb_softc *sc, uint32_t reg, uint32_t val)
    831 {
    832 	uint32_t wreg;
    833 
    834 	wreg = ((reg & TDV_GENDAC_ADDRMASK) << 8) | val;
    835 
    836 #ifdef TDVFB_DEBUG_REGS
    837 	aprint_normal("cvg_dac_write val %x to reg %x (%x)\n", val, reg,
    838 	    wreg);
    839 #endif /* TDVFB_DEBUG_REGS */
    840 
    841 	tdvfb_cvg_write(sc, TDV_OFF_DAC_DATA, wreg);
    842 	tdvfb_wait(sc);
    843 }
    844 
    845 static void
    846 tdvfb_rectfill(struct tdvfb_softc *sc, int x, int y, int wi, int he,
    847     uint32_t color)
    848 {
    849 	tdvfb_cvg_write(sc, TDV_OFF_BLTSRC, 0);
    850 	tdvfb_cvg_write(sc, TDV_OFF_BLTDST, 0);
    851 	tdvfb_cvg_write(sc, TDV_OFF_BLTROP, TDV_BLTROP_COPY);
    852 	tdvfb_cvg_write(sc, TDV_OFF_BLTXYSTRIDE,
    853 	    sc->sc_linebytes | (sc->sc_linebytes << 16));
    854 	tdvfb_cvg_write(sc, TDV_OFF_BLTDSTXY, x | (y << 16));
    855 	tdvfb_cvg_write(sc, TDV_OFF_BLTSIZE, wi | (he << 16));
    856 	tdvfb_cvg_write(sc, TDV_OFF_BLTCMD, TDV_BLTCMD_RECTFILL |
    857 	    TDV_BLTCMD_LAUNCH | TDV_BLTCMD_FMT_565 << 3 | TDV_BLTCMD_DSTTILED |
    858 	    TDV_BLTCMD_CLIPRECT );
    859 	tdvfb_wait(sc);
    860 }
    861 
    862 static void
    863 tdvfb_bitblt(struct tdvfb_softc *sc, int xs, int ys, int xd, int yd, int wi,
    864     int he)
    865 {
    866 	tdvfb_cvg_write(sc, TDV_OFF_BLTSRC, 0);
    867 	tdvfb_cvg_write(sc, TDV_OFF_BLTDST, 0);
    868 	tdvfb_cvg_write(sc, TDV_OFF_BLTROP, TDV_BLTROP_COPY);
    869 	tdvfb_cvg_write(sc, TDV_OFF_BLTXYSTRIDE,
    870 	    sc->sc_linebytes | (sc->sc_linebytes << 16));
    871 	tdvfb_cvg_write(sc, TDV_OFF_BLTSRCXY, xs | (ys << 16));
    872 	tdvfb_cvg_write(sc, TDV_OFF_BLTDSTXY, xd | (yd << 16));
    873 	tdvfb_cvg_write(sc, TDV_OFF_BLTSIZE, wi | (he << 16));
    874 	tdvfb_cvg_write(sc, TDV_OFF_BLTCMD, TDV_BLTCMD_SCR2SCR |
    875 	    TDV_BLTCMD_LAUNCH | TDV_BLTCMD_FMT_565 << 3);
    876 
    877 	tdvfb_wait(sc);
    878 }
    879 
    880 static void
    881 tdvfb_copyrows(void *cookie, int srcrow, int dstrow, int nrows)
    882 {
    883 	struct tdvfb_softc *sc;
    884 	struct rasops_info *ri;
    885 	struct vcons_screen *scr;
    886 	int x, ys, yd, wi, he;
    887 
    888 	ri = cookie;
    889 	scr = ri->ri_hw;
    890 	sc = scr->scr_cookie;
    891 
    892 	if (sc->sc_mode == WSDISPLAYIO_MODE_EMUL) {
    893 		x = ri->ri_xorigin;
    894 		ys = ri->ri_yorigin + ri->ri_font->fontheight * srcrow;
    895 		yd = ri->ri_yorigin + ri->ri_font->fontheight * dstrow;
    896 		wi = ri->ri_emuwidth;
    897 		he = ri->ri_font->fontheight * nrows;
    898 		tdvfb_bitblt(sc, x, ys, x, yd, wi, he);
    899 	}
    900 }
    901 
    902 static void
    903 tdvfb_eraserows(void *cookie, int row, int nrows, long fillattr)
    904 {
    905 
    906 	struct tdvfb_softc *sc;
    907 	struct rasops_info *ri;
    908 	struct vcons_screen *scr;
    909 	int x, y, wi, he, fg, bg, ul;
    910 
    911 	ri = cookie;
    912 	scr = ri->ri_hw;
    913 	sc = scr->scr_cookie;
    914 
    915 	if (sc->sc_mode == WSDISPLAYIO_MODE_EMUL) {
    916 		rasops_unpack_attr(fillattr, &fg, &bg, &ul);
    917 		if ((row == 0) && (nrows == ri->ri_rows))
    918 			tdvfb_rectfill(sc, 0, 0, ri->ri_width,
    919 			    ri->ri_height, ri->ri_devcmap[bg]);
    920 		else {
    921 			x = ri->ri_xorigin;
    922 			y = ri->ri_yorigin + ri->ri_font->fontheight * row;
    923 			wi = ri->ri_emuwidth;
    924 			he = ri->ri_font->fontheight * nrows;
    925 			tdvfb_rectfill(sc, x, y, wi, he, ri->ri_devcmap[bg]);
    926 		}
    927 	}
    928 }
    929 
    930 static int
    931 tdvfb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, struct lwp *l)
    932 {
    933 	struct vcons_data *vd;
    934 	struct tdvfb_softc *sc;
    935 	struct wsdisplay_fbinfo *wsfbi;
    936 	struct vcons_screen *ms;
    937 
    938 	vd = v;
    939 	sc = vd->cookie;
    940 	ms = vd->active;
    941 
    942 	switch (cmd) {
    943 	case WSDISPLAYIO_GTYPE:
    944 		*(u_int *)data = WSDISPLAY_TYPE_PCIMISC;
    945 		return 0;
    946 
    947 	case PCI_IOC_CFGREAD:
    948 	case PCI_IOC_CFGWRITE:
    949 		return pci_devioctl(sc->sc_pc, sc->sc_pcitag,
    950 		    cmd, data, flag, l);
    951 
    952 	case WSDISPLAYIO_GET_BUSID:
    953 		return wsdisplayio_busid_pci(sc->sc_dev, sc->sc_pc,
    954 		    sc->sc_pcitag, data);
    955 
    956 	case WSDISPLAYIO_GINFO:
    957 		if (ms == NULL)
    958 			return ENODEV;
    959 
    960 		wsfbi = (void*) data;
    961 		wsfbi->height = ms->scr_ri.ri_height;
    962 		wsfbi->width = ms->scr_ri.ri_width;
    963 		wsfbi->depth = ms->scr_ri.ri_depth;
    964 		wsfbi->cmsize = 256;
    965 		return 0;
    966 
    967 	case WSDISPLAYIO_LINEBYTES:
    968 		*(u_int*)data = sc->sc_linebytes;
    969 		return 0;
    970 
    971 	case WSDISPLAYIO_SMODE:
    972 		{
    973 			int new_mode = *(int*)data;
    974 			if (new_mode != sc->sc_mode) {
    975 				sc->sc_mode = new_mode;
    976 				if(new_mode == WSDISPLAYIO_MODE_EMUL)
    977 					vcons_redraw_screen(ms);
    978 			}
    979 			return 0;
    980 		}
    981 	case WSDISPLAYIO_GET_FBINFO:
    982 		{
    983 			struct wsdisplayio_fbinfo *fbi = data;
    984 			struct rasops_info *ri;
    985 			int ret;
    986 
    987 			ri = &sc->vd.active->scr_ri;
    988 			ret = wsdisplayio_get_fbinfo(ri, fbi);
    989 			return ret;
    990 		}
    991 	}
    992 	return EPASSTHROUGH;
    993 }
    994 
    995 static paddr_t
    996 tdvfb_mmap(void *v, void *vs, off_t offset, int prot)
    997 {
    998 	struct vcons_data *vd;
    999 	struct tdvfb_softc *sc;
   1000 	paddr_t pa;
   1001 
   1002 	vd = v;
   1003 	sc = vd->cookie;
   1004 
   1005 	if (offset < sc->sc_memsize) {
   1006 		pa = bus_space_mmap(sc->sc_cvgt, sc->sc_fbh + offset, 0, prot,
   1007 		    BUS_SPACE_MAP_LINEAR);
   1008 		return pa;
   1009 	}
   1010 
   1011 	return -1;
   1012 }
   1013 
   1014