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grf.c revision 1.54 
      1 /*	$NetBSD: grf.c,v 1.54 2022/06/26 06:25:09 tsutsui Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1995 Leo Weppelman
      5  * Copyright (c) 1988 University of Utah.
      6  * Copyright (c) 1990 The Regents of the University of California.
      7  * All rights reserved.
      8  *
      9  * This code is derived from software contributed to Berkeley by
     10  * the Systems Programming Group of the University of Utah Computer
     11  * Science Department.
     12  *
     13  * Redistribution and use in source and binary forms, with or without
     14  * modification, are permitted provided that the following conditions
     15  * are met:
     16  * 1. Redistributions of source code must retain the above copyright
     17  *    notice, this list of conditions and the following disclaimer.
     18  * 2. Redistributions in binary form must reproduce the above copyright
     19  *    notice, this list of conditions and the following disclaimer in the
     20  *    documentation and/or other materials provided with the distribution.
     21  * 3. Neither the name of the University nor the names of its contributors
     22  *    may be used to endorse or promote products derived from this software
     23  *    without specific prior written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     35  * SUCH DAMAGE.
     36  *
     37  * from: Utah $Hdr: grf.c 1.31 91/01/21$
     38  *
     39  *	@(#)grf.c	7.8 (Berkeley) 5/7/91
     40  */
     41 
     42 /*
     43  * Graphics display driver for the Atari
     44  * This is the hardware-independent portion of the driver.
     45  * Hardware access is through the grf_softc->g_mode routine.
     46  */
     47 
     48 #include <sys/cdefs.h>
     49 __KERNEL_RCSID(0, "$NetBSD: grf.c,v 1.54 2022/06/26 06:25:09 tsutsui Exp $");
     50 
     51 #include <sys/param.h>
     52 #include <sys/proc.h>
     53 #include <sys/ioctl.h>
     54 #include <sys/device.h>
     55 #include <sys/file.h>
     56 #include <sys/malloc.h>
     57 #include <sys/conf.h>
     58 #include <sys/systm.h>
     59 #include <sys/vnode.h>
     60 #include <sys/mman.h>
     61 
     62 #include <machine/cpu.h>
     63 
     64 #include <uvm/uvm_extern.h>
     65 
     66 #include <atari/atari/device.h>
     67 #include <atari/dev/grfioctl.h>
     68 #include <atari/dev/grfabs_reg.h>
     69 #include <atari/dev/grfvar.h>
     70 #include <atari/dev/itevar.h>
     71 #include <atari/dev/viewioctl.h>
     72 #include <atari/dev/viewvar.h>
     73 
     74 #include "ioconf.h"
     75 
     76 #include "grfcc.h"
     77 #include "grfet.h"
     78 #define	NGRF	(NGRFCC + NGRFET)
     79 
     80 #if NGRF > 0
     81 
     82 #include "ite.h"
     83 #if NITE == 0
     84 #define	ite_on(u,f)
     85 #define	ite_off(u,f)
     86 #define ite_reinit(d)
     87 #endif
     88 
     89 int grfon(dev_t);
     90 int grfoff(dev_t);
     91 int grfsinfo(dev_t, struct grfdyninfo *);
     92 
     93 static int grfbusprint(void *, const char *);
     94 static int grfbusmatch(device_t, cfdata_t, void *);
     95 static void grfbusattach(device_t, device_t, void *);
     96 
     97 /*
     98  * pointers to grf drivers device structs
     99  */
    100 struct grf_softc *grfsp[NGRF]; /* XXX */
    101 
    102 CFATTACH_DECL_NEW(grfbus, 0,
    103     grfbusmatch, grfbusattach, NULL, NULL);
    104 
    105 static dev_type_open(grfopen);
    106 static dev_type_close(grfclose);
    107 static dev_type_ioctl(grfioctl);
    108 static dev_type_mmap(grfmmap);
    109 
    110 const struct cdevsw grf_cdevsw = {
    111 	.d_open = grfopen,
    112 	.d_close = grfclose,
    113 	.d_read = noread,
    114 	.d_write = nowrite,
    115 	.d_ioctl = grfioctl,
    116 	.d_stop = nostop,
    117 	.d_tty = notty,
    118 	.d_poll = nopoll,
    119 	.d_mmap = grfmmap,
    120 	.d_kqfilter = nokqfilter,
    121 	.d_discard = nodiscard,
    122 	.d_flag = 0
    123 };
    124 
    125 /*
    126  * only used in console init.
    127  */
    128 static cfdata_t cfdata_gbus  = NULL;
    129 
    130 static int
    131 grfbusmatch(device_t parent, cfdata_t cf, void *aux)
    132 {
    133 
    134 	if (strcmp(aux, grfbus_cd.cd_name))
    135 		return 0;
    136 
    137 	if (atari_realconfig == 0)
    138 		cfdata_gbus = cf;
    139 	return 1;	/* Always there	*/
    140 }
    141 
    142 static void
    143 grfbusattach(device_t parent, device_t self, void *aux)
    144 {
    145 	grf_auxp_t	grf_auxp;
    146 
    147 	grf_auxp.busprint       = grfbusprint;
    148 	grf_auxp.from_bus_match = 1;
    149 
    150 	if (self == NULL) { /* Console init	*/
    151 		atari_config_found(cfdata_gbus, NULL, &grf_auxp, grfbusprint,
    152 		    CFARGS_NONE);
    153 	} else {
    154 		printf("\n");
    155 		config_found(self, &grf_auxp, grfbusprint, CFARGS_NONE);
    156 	}
    157 }
    158 
    159 static int
    160 grfbusprint(void *aux, const char *name)
    161 {
    162 
    163 	if (name == NULL)
    164 		return UNCONF;
    165 	return QUIET;
    166 }
    167 
    168 /*ARGSUSED*/
    169 static int
    170 grfopen(dev_t dev, int flags, int devtype, struct lwp *l)
    171 {
    172 	struct grf_softc *gp;
    173 
    174 	if (GRFUNIT(dev) >= NGRF)
    175 		return ENXIO;
    176 
    177 	gp = grfsp[GRFUNIT(dev)];
    178 	if (gp == NULL)
    179 		return ENXIO;
    180 
    181 	if ((gp->g_flags & GF_ALIVE) == 0)
    182 		return ENXIO;
    183 
    184 	if ((gp->g_flags & (GF_OPEN|GF_EXCLUDE)) == (GF_OPEN|GF_EXCLUDE))
    185 		return EBUSY;
    186 	grf_viewsync(gp);
    187 
    188 	return 0;
    189 }
    190 
    191 /*ARGSUSED*/
    192 static int
    193 grfclose(dev_t dev, int flags, int mode, struct lwp *l)
    194 {
    195 	struct grf_softc *gp;
    196 
    197 	gp = grfsp[GRFUNIT(dev)];
    198 	(void)grfoff(dev);
    199 	gp->g_flags &= GF_ALIVE;
    200 	return 0;
    201 }
    202 
    203 /*ARGSUSED*/
    204 static int
    205 grfioctl(dev_t dev, u_long cmd, void * data, int flag, struct lwp *l)
    206 {
    207 	struct grf_softc	*gp;
    208 	int			error;
    209 	extern const struct cdevsw view_cdevsw;
    210 
    211 	gp = grfsp[GRFUNIT(dev)];
    212 	error = 0;
    213 
    214 	switch (cmd) {
    215 	case OGRFIOCGINFO:
    216 	        /* argl.. no bank-member.. */
    217 	  	memcpy(data, (void *)&gp->g_display, sizeof(struct grfinfo)-4);
    218 		break;
    219 	case GRFIOCGINFO:
    220 		memcpy(data, (void *)&gp->g_display, sizeof(struct grfinfo));
    221 		break;
    222 	case GRFIOCON:
    223 		error = grfon(dev);
    224 		break;
    225 	case GRFIOCOFF:
    226 		error = grfoff(dev);
    227 		break;
    228 	case GRFIOCSINFO:
    229 		error = grfsinfo(dev, (struct grfdyninfo *) data);
    230 		break;
    231 	case GRFGETVMODE:
    232 		return gp->g_mode(gp, GM_GRFGETVMODE, data, 0, 0);
    233 	case GRFSETVMODE:
    234 		error = gp->g_mode(gp, GM_GRFSETVMODE, data, 0, 0);
    235 		if (error == 0 && gp->g_itedev)
    236 			ite_reinit(gp->g_itedev);
    237 		break;
    238 	case GRFGETNUMVM:
    239 		return gp->g_mode(gp, GM_GRFGETNUMVM, data, 0, 0);
    240 	/*
    241 	 * these are all hardware dependent, and have to be resolved
    242 	 * in the respective driver.
    243 	 */
    244 	case GRFIOCPUTCMAP:
    245 	case GRFIOCGETCMAP:
    246 	case GRFIOCSSPRITEPOS:
    247 	case GRFIOCGSPRITEPOS:
    248 	case GRFIOCSSPRITEINF:
    249 	case GRFIOCGSPRITEINF:
    250 	case GRFIOCGSPRITEMAX:
    251 	default:
    252 		/*
    253 		 * check to see whether it's a command recognized by the
    254 		 * view code.
    255 		 */
    256 		return (*view_cdevsw.d_ioctl)(gp->g_viewdev,
    257 		    cmd, data, flag, l);
    258 		error = EINVAL;
    259 		break;
    260 
    261 	}
    262 	return error;
    263 }
    264 
    265 /*
    266  * map the contents of a graphics display card into process'
    267  * memory space.
    268  */
    269 static paddr_t
    270 grfmmap(dev_t dev, off_t off, int prot)
    271 {
    272 	struct grf_softc	*gp;
    273 	struct grfinfo		*gi;
    274 	u_int			vgabase, linbase;
    275 
    276 	gp = grfsp[GRFUNIT(dev)];
    277 	gi = &gp->g_display;
    278 
    279 	vgabase = gi->gd_vgabase;
    280 	linbase = gi->gd_linbase;
    281 
    282 	/*
    283 	 * control registers
    284 	 */
    285 	if (off >= 0 && off < gi->gd_regsize)
    286 		return ((paddr_t)gi->gd_regaddr + off) >> PGSHIFT;
    287 
    288 	/*
    289 	 * VGA memory
    290 	 */
    291 	if (off >= vgabase && off < (vgabase + gi->gd_vgasize))
    292 		return ((paddr_t)gi->gd_vgaaddr - vgabase + off) >> PGSHIFT;
    293 
    294 	/*
    295 	 * frame buffer
    296 	 */
    297 	if (off >= linbase && off < (linbase + gi->gd_fbsize))
    298 		return ((paddr_t)gi->gd_fbaddr - linbase + off) >> PGSHIFT;
    299 	return -1;
    300 }
    301 
    302 int
    303 grfon(dev_t dev)
    304 {
    305 	struct grf_softc *gp;
    306 
    307 	gp = grfsp[GRFUNIT(dev)];
    308 
    309 	if (gp->g_flags & GF_GRFON)
    310 		return 0;
    311 
    312 	gp->g_flags |= GF_GRFON;
    313 	if (gp->g_itedev != NODEV)
    314 		ite_off(gp->g_itedev, 3);
    315 
    316 	return gp->g_mode(gp, (dev & GRFOVDEV) ? GM_GRFOVON : GM_GRFON,
    317 	    NULL, 0, 0);
    318 }
    319 
    320 int
    321 grfoff(dev_t dev)
    322 {
    323 	struct grf_softc *gp;
    324 	int error;
    325 
    326 	gp = grfsp[GRFUNIT(dev)];
    327 
    328 	if ((gp->g_flags & GF_GRFON) == 0)
    329 		return 0;
    330 
    331 	gp->g_flags &= ~GF_GRFON;
    332 	error = gp->g_mode(gp, (dev & GRFOVDEV) ? GM_GRFOVOFF : GM_GRFOFF,
    333 	    NULL, 0, 0);
    334 
    335 	/*
    336 	 * Closely tied together no X's
    337 	 */
    338 	if (gp->g_itedev != NODEV)
    339 		ite_on(gp->g_itedev, 2);
    340 
    341 	return error;
    342 }
    343 
    344 int
    345 grfsinfo(dev_t dev, struct grfdyninfo *dyninfo)
    346 {
    347 	struct grf_softc *gp;
    348 	int error;
    349 
    350 	gp = grfsp[GRFUNIT(dev)];
    351 	error = gp->g_mode(gp, GM_GRFCONFIG, dyninfo, 0, 0);
    352 
    353 	/*
    354 	 * Closely tied together no X's
    355 	 */
    356 	if (gp->g_itedev != NODEV)
    357 		ite_reinit(gp->g_itedev);
    358 	return error;
    359 }
    360 
    361 /*
    362  * Get the grf-info in sync with underlying view.
    363  */
    364 void
    365 grf_viewsync(struct grf_softc *gp)
    366 {
    367 	struct view_size	vs;
    368 	bmap_t			bm;
    369 	struct grfinfo		*gi;
    370 	extern const struct cdevsw view_cdevsw;
    371 
    372 	gi = &gp->g_display;
    373 
    374 	(*view_cdevsw.d_ioctl)(gp->g_viewdev, VIOCGBMAP, (void *)&bm,
    375 			       0, NOLWP);
    376 
    377 	gp->g_data = (void *) 0xDeadBeaf; /* not particularly clean.. */
    378 
    379 	gi->gd_fbaddr  = bm.hw_address;
    380 	gi->gd_fbsize  = bm.phys_mappable;
    381 	gi->gd_linbase = bm.lin_base;
    382 	gi->gd_regaddr = bm.hw_regs;
    383 	gi->gd_regsize = bm.reg_size;
    384 	gi->gd_vgaaddr = bm.vga_address;
    385 	gi->gd_vgasize = bm.vga_mappable;
    386 	gi->gd_vgabase = bm.vga_base;
    387 
    388 	if ((*view_cdevsw.d_ioctl)(gp->g_viewdev, VIOCGSIZE, (void *)&vs, 0,
    389 	    NOLWP)) {
    390 		/*
    391 		 * fill in some default values...
    392 		 * XXX: Should _never_ happen
    393 		 */
    394 		vs.width  = 640;
    395 		vs.height = 400;
    396 		vs.depth  = 1;
    397 	}
    398 	gi->gd_colors = 1 << vs.depth;
    399 	gi->gd_planes = vs.depth;
    400 
    401 	gi->gd_fbwidth         = vs.width;
    402 	gi->gd_fbheight        = vs.height;
    403 	gi->gd_dyn.gdi_fbx     = 0;
    404 	gi->gd_dyn.gdi_fby     = 0;
    405 	gi->gd_dyn.gdi_dwidth  = vs.width;
    406 	gi->gd_dyn.gdi_dheight = vs.height;
    407 	gi->gd_dyn.gdi_dx      = 0;
    408 	gi->gd_dyn.gdi_dy      = 0;
    409 }
    410 
    411 /*
    412  * Change the mode of the display.
    413  * Right now all we can do is grfon/grfoff.
    414  * Return a UNIX error number or 0 for success.
    415  */
    416 /*ARGSUSED*/
    417 int
    418 grf_mode(struct grf_softc *gp, int cmd, void *arg, int a2, int a3)
    419 {
    420 	extern const struct cdevsw view_cdevsw;
    421 
    422 	switch (cmd) {
    423 		case GM_GRFON:
    424 			/*
    425 			 * Get in sync with view, ite might have changed it.
    426 			 */
    427 			grf_viewsync(gp);
    428 			(*view_cdevsw.d_ioctl)(gp->g_viewdev, VIOCDISPLAY,
    429 					       NULL, 0, NOLWP);
    430 			return 0;
    431 	case GM_GRFOFF:
    432 			(*view_cdevsw.d_ioctl)(gp->g_viewdev, VIOCREMOVE,
    433 					       NULL, 0, NOLWP);
    434 			return 0;
    435 	case GM_GRFCONFIG:
    436 	default:
    437 			break;
    438 	}
    439 	return EPASSTHROUGH;
    440 }
    441 #endif	/* NGRF > 0 */
    442