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fb.c revision 1.18 
      1 /*	$NetBSD: fb.c,v 1.18 2004/03/17 17:04:58 pk Exp $ */
      2 
      3 /*
      4  * Copyright (c) 1992, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * This software was developed by the Computer Systems Engineering group
      8  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
      9  * contributed to Berkeley.
     10  *
     11  * All advertising materials mentioning features or use of this software
     12  * must display the following acknowledgement:
     13  *	This product includes software developed by the University of
     14  *	California, Lawrence Berkeley Laboratory.
     15  *
     16  * Redistribution and use in source and binary forms, with or without
     17  * modification, are permitted provided that the following conditions
     18  * are met:
     19  * 1. Redistributions of source code must retain the above copyright
     20  *    notice, this list of conditions and the following disclaimer.
     21  * 2. Redistributions in binary form must reproduce the above copyright
     22  *    notice, this list of conditions and the following disclaimer in the
     23  *    documentation and/or other materials provided with the distribution.
     24  * 3. Neither the name of the University nor the names of its contributors
     25  *    may be used to endorse or promote products derived from this software
     26  *    without specific prior written permission.
     27  *
     28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     38  * SUCH DAMAGE.
     39  *
     40  *	@(#)fb.c	8.1 (Berkeley) 6/11/93
     41  */
     42 
     43 /*
     44  * /dev/fb (indirect frame buffer driver).  This is gross; we should
     45  * just build cdevsw[] dynamically.
     46  */
     47 
     48 #include <sys/cdefs.h>
     49 __KERNEL_RCSID(0, "$NetBSD: fb.c,v 1.18 2004/03/17 17:04:58 pk Exp $");
     50 
     51 #include <sys/param.h>
     52 #include <sys/systm.h>
     53 #include <sys/device.h>
     54 #include <sys/proc.h>
     55 #include <sys/conf.h>
     56 
     57 #include <machine/autoconf.h>
     58 #include <machine/kbd.h>
     59 #include <machine/eeprom.h>
     60 #include <sparc/dev/cons.h>
     61 
     62 #include <dev/sun/fbio.h>
     63 #include <dev/sun/fbvar.h>
     64 
     65 #include "kbd.h"
     66 #include "pfour.h"
     67 
     68 static struct fbdevice *devfb;
     69 
     70 dev_type_open(fbopen);
     71 dev_type_close(fbclose);
     72 dev_type_ioctl(fbioctl);
     73 dev_type_poll(fbpoll);
     74 dev_type_mmap(fbmmap);
     75 dev_type_kqfilter(fbkqfilter);
     76 
     77 const struct cdevsw fb_cdevsw = {
     78 	fbopen, fbclose, noread, nowrite, fbioctl,
     79 	nostop, notty, fbpoll, fbmmap, fbkqfilter,
     80 };
     81 
     82 void
     83 fb_unblank()
     84 {
     85 
     86 	if (devfb)
     87 		(*devfb->fb_driver->fbd_unblank)(devfb->fb_device);
     88 }
     89 
     90 /*
     91  * Helper function for frame buffer devices. Decides whether
     92  * the device can be the console output device according to
     93  * PROM info. The result from this function may not be conclusive
     94  * on machines with old PROMs; in that case, drivers should consult
     95  * other sources of configuration information (e.g. EEPROM entries).
     96  */
     97 #if defined(SUN4U)
     98 /* Temporary special case for sun4u */
     99 int
    100 fb_is_console(node)
    101 	int node;
    102 {
    103 	extern int fbnode;
    104 	return (node == fbnode);
    105 }
    106 #else
    107 int
    108 fb_is_console(node)
    109 	int node;
    110 {
    111 	int fbnode;
    112 
    113 	switch (prom_version()) {
    114 	case PROM_OLDMON:
    115 		/* `node' is not valid; just check for any fb device */
    116 		return (prom_stdout() == PROMDEV_SCREEN);
    117 
    118 	case PROM_OBP_V0:
    119 		/*
    120 		 * First, check if prom_stdout() represents a frame buffer,
    121 		 * then match on the `fb' property on the root node, if any.
    122 		 */
    123 		if (prom_stdout() != PROMDEV_SCREEN)
    124 			return (0);
    125 
    126 		fbnode = prom_getpropint(findroot(), "fb", 0);
    127 		return (fbnode == 0 || node == fbnode);
    128 
    129 	case PROM_OBP_V2:
    130 	case PROM_OBP_V3:
    131 	case PROM_OPENFIRM:
    132 		/* Just match the nodes */
    133 		return (node == prom_stdout_node);
    134 	}
    135 
    136 	return (0);
    137 }
    138 #endif /* SUN4U */
    139 
    140 void
    141 fb_attach(fb, isconsole)
    142 	struct fbdevice *fb;
    143 	int isconsole;
    144 {
    145 	static int no_replace, seen_force;
    146 
    147 	/*
    148 	 * We've already had a framebuffer forced into /dev/fb.  Don't
    149 	 * allow any more, even if this is the console.
    150 	 */
    151 	if (seen_force) {
    152 		if (devfb) {	/* sanity */
    153 			printf("%s: /dev/fb already full\n",
    154 				fb->fb_device->dv_xname);
    155 			return;
    156 		} else
    157 			seen_force = 0;
    158 	}
    159 
    160 	/*
    161 	 * Check to see if we're being forced into /dev/fb.
    162 	 */
    163 	if (fb->fb_flags & FB_FORCE) {
    164 		if (devfb)
    165 			printf("%s: forcefully replacing %s\n",
    166 				fb->fb_device->dv_xname,
    167 				devfb->fb_device->dv_xname);
    168 		devfb = fb;
    169 		seen_force = no_replace = 1;
    170 		goto attached;
    171 	}
    172 
    173 	/*
    174 	 * Check to see if we're the console.  If we are, then replace
    175 	 * any currently existing framebuffer.
    176 	 */
    177 	if (isconsole) {
    178 		if (devfb)
    179 			printf("%s: replacing %s\n", fb->fb_device->dv_xname,
    180 				devfb->fb_device->dv_xname);
    181 		devfb = fb;
    182 		no_replace = 1;
    183 		goto attached;
    184 	}
    185 
    186 	/*
    187 	 * For the final case, we check to see if we can replace an
    188 	 * existing framebuffer, if not, say so and return.
    189 	 */
    190 	if (no_replace) {
    191 		if (devfb) {	/* sanity */
    192 			printf("%s: /dev/fb already full\n",
    193 				fb->fb_device->dv_xname);
    194 			return;
    195 		} else
    196 			no_replace = 0;
    197 	}
    198 
    199 	if (devfb)
    200 		printf("%s: replacing %s\n", fb->fb_device->dv_xname,
    201 			devfb->fb_device->dv_xname);
    202 	devfb = fb;
    203 
    204  attached:
    205 	printf("%s: attached to /dev/fb\n", devfb->fb_device->dv_xname);
    206 }
    207 
    208 int
    209 fbopen(dev, flags, mode, p)
    210 	dev_t dev;
    211 	int flags, mode;
    212 	struct proc *p;
    213 {
    214 
    215 	if (devfb == NULL)
    216 		return (ENXIO);
    217 	return (devfb->fb_driver->fbd_open)(dev, flags, mode, p);
    218 }
    219 
    220 int
    221 fbclose(dev, flags, mode, p)
    222 	dev_t dev;
    223 	int flags, mode;
    224 	struct proc *p;
    225 {
    226 
    227 	return (devfb->fb_driver->fbd_close)(dev, flags, mode, p);
    228 }
    229 
    230 int
    231 fbioctl(dev, cmd, data, flags, p)
    232 	dev_t dev;
    233 	u_long cmd;
    234 	caddr_t data;
    235 	int flags;
    236 	struct proc *p;
    237 {
    238 
    239 	return (devfb->fb_driver->fbd_ioctl)(dev, cmd, data, flags, p);
    240 }
    241 
    242 int
    243 fbpoll(dev, events, p)
    244 	dev_t dev;
    245 	int events;
    246 	struct proc *p;
    247 {
    248 
    249 	return (devfb->fb_driver->fbd_poll)(dev, events, p);
    250 }
    251 
    252 int
    253 fbkqfilter(dev, kn)
    254 	dev_t dev;
    255 	struct knote *kn;
    256 {
    257 
    258 	return (devfb->fb_driver->fbd_kqfilter)(dev, kn);
    259 }
    260 
    261 paddr_t
    262 fbmmap(dev, off, prot)
    263 	dev_t dev;
    264 	off_t off;
    265 	int prot;
    266 {
    267 	paddr_t (*map)__P((dev_t, off_t, int)) = devfb->fb_driver->fbd_mmap;
    268 
    269 	if (map == NULL)
    270 		return (-1);
    271 	return (map(dev, off, prot));
    272 }
    273 
    274 void
    275 fb_setsize_obp(fb, depth, def_width, def_height, node)
    276 	struct fbdevice *fb;
    277 	int depth, def_width, def_height, node;
    278 {
    279 	fb->fb_type.fb_width = prom_getpropint(node, "width", def_width);
    280 	fb->fb_type.fb_height = prom_getpropint(node, "height", def_height);
    281 	fb->fb_linebytes = prom_getpropint(node, "linebytes",
    282 				     (fb->fb_type.fb_width * depth) / 8);
    283 }
    284 
    285 void
    286 fb_setsize_eeprom(fb, depth, def_width, def_height)
    287 	struct fbdevice *fb;
    288 	int depth, def_width, def_height;
    289 {
    290 #if !defined(SUN4U)
    291 	struct eeprom *eep = (struct eeprom *)eeprom_va;
    292 
    293 	if (!CPU_ISSUN4) {
    294 		printf("fb_setsize_eeprom: not sun4\n");
    295 		return;
    296 	}
    297 
    298 	/* Set up some defaults. */
    299 	fb->fb_type.fb_width = def_width;
    300 	fb->fb_type.fb_height = def_height;
    301 
    302 	if (fb->fb_flags & FB_PFOUR) {
    303 #if NPFOUR > 0
    304 		fb_setsize_pfour(fb);
    305 #endif
    306 	} else if (eep != NULL) {
    307 		switch (eep->eeScreenSize) {
    308 		case EE_SCR_1152X900:
    309 			fb->fb_type.fb_width = 1152;
    310 			fb->fb_type.fb_height = 900;
    311 			break;
    312 
    313 		case EE_SCR_1024X1024:
    314 			fb->fb_type.fb_width = 1024;
    315 			fb->fb_type.fb_height = 1024;
    316 			break;
    317 
    318 		case EE_SCR_1600X1280:
    319 			fb->fb_type.fb_width = 1600;
    320 			fb->fb_type.fb_height = 1280;
    321 			break;
    322 
    323 		case EE_SCR_1440X1440:
    324 			fb->fb_type.fb_width = 1440;
    325 			fb->fb_type.fb_height = 1440;
    326 			break;
    327 
    328 		default:
    329 			/*
    330 			 * XXX: Do nothing, I guess.
    331 			 * Should we print a warning about
    332 			 * an unknown value? --thorpej
    333 			 */
    334 			break;
    335 		}
    336 	}
    337 
    338 	fb->fb_linebytes = (fb->fb_type.fb_width * depth) / 8;
    339 #endif /* !SUN4U */
    340 }
    341 
    342 
    343 
    344 #ifdef RASTERCONSOLE
    345 #include <machine/kbd.h>
    346 
    347 static void fb_bell __P((int));
    348 
    349 static void
    350 fb_bell(on)
    351 	int on;
    352 {
    353 #if NKBD > 0
    354 	kbd_bell(on);
    355 #endif
    356 }
    357 
    358 void
    359 fbrcons_init(fb)
    360 	struct fbdevice *fb;
    361 {
    362 	struct rconsole	*rc = &fb->fb_rcons;
    363 	struct rasops_info *ri = &fb->fb_rinfo;
    364 	int maxrow, maxcol;
    365 #if !defined(RASTERCONS_FULLSCREEN)
    366 	int *row, *col;
    367 #endif
    368 
    369 	/* Set up what rasops needs to know about */
    370 	bzero(ri, sizeof *ri);
    371 	ri->ri_stride = fb->fb_linebytes;
    372 	ri->ri_bits = (caddr_t)fb->fb_pixels;
    373 	ri->ri_depth = fb->fb_type.fb_depth;
    374 	ri->ri_width = fb->fb_type.fb_width;
    375 	ri->ri_height = fb->fb_type.fb_height;
    376 	maxrow = 5000;
    377 	maxcol = 5000;
    378 
    379 #if !defined(RASTERCONS_FULLSCREEN)
    380 #if !defined(SUN4U)
    381 	if (CPU_ISSUN4) {
    382 		struct eeprom *eep = (struct eeprom *)eeprom_va;
    383 
    384 		if (eep == NULL) {
    385 			maxcol = 80;
    386 			maxrow = 34;
    387 		} else {
    388 			maxcol = eep->eeTtyCols;
    389 			maxrow = eep->eeTtyRows;
    390 		}
    391 	}
    392 #endif /* !SUN4U */
    393 	if (!CPU_ISSUN4) {
    394 		char buf[6+1];	/* Enough for six digits */
    395 		maxcol = (prom_getoption("screen-#columns", buf, sizeof buf) == 0)
    396 			? strtoul(buf, NULL, 10)
    397 			: 80;
    398 
    399 		maxrow = (prom_getoption("screen-#rows", buf, sizeof buf) != 0)
    400 			? strtoul(buf, NULL, 10)
    401 			: 34;
    402 
    403 	}
    404 #endif /* !RASTERCONS_FULLSCREEN */
    405 	/*
    406 	 * - force monochrome output
    407 	 * - eraserows() hack to clear the *entire* display
    408 	 * - cursor is currently enabled
    409 	 * - center output
    410 	 */
    411 	ri->ri_flg = RI_FULLCLEAR | RI_CURSOR | RI_CENTER;
    412 
    413 	/* Get operations set and connect to rcons */
    414 	if (rasops_init(ri, maxrow, maxcol))
    415 		panic("fbrcons_init: rasops_init failed!");
    416 
    417 	if (ri->ri_depth == 8) {
    418 		int i;
    419 		for (i = 0; i < 16; i++) {
    420 
    421 			/*
    422 			 * Cmap entries are repeated four times in the
    423 			 * 32 bit wide `devcmap' entries for optimization
    424 			 * purposes; see rasops(9)
    425 			 */
    426 #define I_TO_DEVCMAP(i)	((i) | ((i)<<8) | ((i)<<16) | ((i)<<24))
    427 
    428 			/*
    429 			 * Use existing colormap entries for black and white
    430 			 */
    431 			if ((i & 7) == WSCOL_BLACK) {
    432 				ri->ri_devcmap[i] = I_TO_DEVCMAP(255);
    433 				continue;
    434 			}
    435 
    436 			if ((i & 7) == WSCOL_WHITE) {
    437 				ri->ri_devcmap[i] = I_TO_DEVCMAP(0);
    438 				continue;
    439 			}
    440 			/*
    441 			 * Other entries refer to ANSI map, which for now
    442 			 * is setup in bt_subr.c
    443 			 */
    444 			ri->ri_devcmap[i] = I_TO_DEVCMAP(i + 1);
    445 #undef I_TO_DEVCMAP
    446 		}
    447 	}
    448 
    449 	rc->rc_row = rc->rc_col = 0;
    450 #if !defined(RASTERCONS_FULLSCREEN)
    451 	/* Determine addresses of prom emulator row and column */
    452 	if (!CPU_ISSUN4 && !romgetcursoraddr(&row, &col)) {
    453 		rc->rc_row = *row;
    454 		rc->rc_col = *col;
    455 	}
    456 #endif
    457 	ri->ri_crow = rc->rc_row;
    458 	ri->ri_ccol = rc->rc_col;
    459 
    460 	rc->rc_ops = &ri->ri_ops;
    461 	rc->rc_cookie = ri;
    462 	rc->rc_bell = fb_bell;
    463 	rc->rc_maxcol = ri->ri_cols;
    464 	rc->rc_maxrow = ri->ri_rows;
    465 	rc->rc_width = ri->ri_emuwidth;
    466 	rc->rc_height = ri->ri_emuheight;
    467 	rc->rc_deffgcolor = WSCOL_BLACK;
    468 	rc->rc_defbgcolor = WSCOL_WHITE;
    469 	rcons_init(rc, 0);
    470 
    471 	/* Hook up virtual console */
    472 	v_putc = rcons_cnputc;
    473 }
    474 
    475 int
    476 fbrcons_rows()
    477 {
    478 	return (devfb ? devfb->fb_rcons.rc_maxrow : 0);
    479 }
    480 
    481 int
    482 fbrcons_cols()
    483 {
    484 	return (devfb ? devfb->fb_rcons.rc_maxcol : 0);
    485 }
    486 #endif /* RASTERCONSOLE */
    487