xref: /netbsd/sys/dev/isa/pcdisplay.c (revision bf9ec67e) 
1 /* $NetBSD: pcdisplay.c,v 1.17 2002/03/17 19:40:59 atatat Exp $ */
2 
3 /*
4  * Copyright (c) 1998
5  *	Matthias Drochner.  All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  * 3. All advertising materials mentioning features or use of this software
16  *    must display the following acknowledgement:
17  *	This product includes software developed for the NetBSD Project
18  *	by Matthias Drochner.
19  * 4. The name of the author may not be used to endorse or promote products
20  *    derived from this software without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32  *
33  */
34 
35 #include <sys/cdefs.h>
36 __KERNEL_RCSID(0, "$NetBSD: pcdisplay.c,v 1.17 2002/03/17 19:40:59 atatat Exp $");
37 
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/kernel.h>
41 #include <sys/device.h>
42 #include <sys/malloc.h>
43 #include <machine/bus.h>
44 
45 #include <dev/isa/isavar.h>
46 
47 #include <dev/ic/mc6845reg.h>
48 #include <dev/ic/pcdisplayvar.h>
49 #include <dev/isa/pcdisplayvar.h>
50 
51 #include <dev/ic/pcdisplay.h>
52 
53 #include <dev/wscons/wsconsio.h>
54 #include <dev/wscons/wsdisplayvar.h>
55 
56 #include "pcweasel.h"
57 #if NPCWEASEL > 0
58 #include <dev/isa/weaselreg.h>
59 #include <dev/isa/weaselvar.h>
60 #endif
61 
62 struct pcdisplay_config {
63 	struct pcdisplayscreen pcs;
64 	struct pcdisplay_handle dc_ph;
65 	int mono;
66 };
67 
68 struct pcdisplay_softc {
69 	struct device sc_dev;
70 	struct pcdisplay_config *sc_dc;
71 	int nscreens;
72 #if NPCWEASEL > 0
73 	struct weasel_handle sc_weasel;
74 #endif
75 };
76 
77 static int pcdisplayconsole, pcdisplay_console_attached;
78 static struct pcdisplay_config pcdisplay_console_dc;
79 
80 int	pcdisplay_match __P((struct device *, struct cfdata *, void *));
81 void	pcdisplay_attach __P((struct device *, struct device *, void *));
82 
83 static int pcdisplay_is_console __P((bus_space_tag_t));
84 static int pcdisplay_probe_col __P((bus_space_tag_t, bus_space_tag_t));
85 static int pcdisplay_probe_mono __P((bus_space_tag_t, bus_space_tag_t));
86 static void pcdisplay_init __P((struct pcdisplay_config *,
87 			     bus_space_tag_t, bus_space_tag_t,
88 			     int));
89 static int pcdisplay_alloc_attr __P((void *, int, int, int, long *));
90 
91 struct cfattach pcdisplay_ca = {
92 	sizeof(struct pcdisplay_softc), pcdisplay_match, pcdisplay_attach,
93 };
94 
95 const struct wsdisplay_emulops pcdisplay_emulops = {
96 	pcdisplay_cursor,
97 	pcdisplay_mapchar,
98 	pcdisplay_putchar,
99 	pcdisplay_copycols,
100 	pcdisplay_erasecols,
101 	pcdisplay_copyrows,
102 	pcdisplay_eraserows,
103 	pcdisplay_alloc_attr
104 };
105 
106 const struct wsscreen_descr pcdisplay_scr = {
107 	"80x25", 80, 25,
108 	&pcdisplay_emulops,
109 	0, 0, /* no font support */
110 	WSSCREEN_REVERSE /* that's minimal... */
111 };
112 
113 const struct wsscreen_descr *_pcdisplay_scrlist[] = {
114 	&pcdisplay_scr,
115 };
116 
117 const struct wsscreen_list pcdisplay_screenlist = {
118 	sizeof(_pcdisplay_scrlist) / sizeof(struct wsscreen_descr *),
119 	_pcdisplay_scrlist
120 };
121 
122 static int pcdisplay_ioctl __P((void *, u_long, caddr_t, int, struct proc *));
123 static paddr_t pcdisplay_mmap __P((void *, off_t, int));
124 static int pcdisplay_alloc_screen __P((void *, const struct wsscreen_descr *,
125 				       void **, int *, int *, long *));
126 static void pcdisplay_free_screen __P((void *, void *));
127 static int pcdisplay_show_screen __P((void *, void *, int,
128 				      void (*) (void *, int, int), void *));
129 
130 const struct wsdisplay_accessops pcdisplay_accessops = {
131 	pcdisplay_ioctl,
132 	pcdisplay_mmap,
133 	pcdisplay_alloc_screen,
134 	pcdisplay_free_screen,
135 	pcdisplay_show_screen,
136 	0 /* load_font */
137 };
138 
139 static int
140 pcdisplay_probe_col(iot, memt)
141 	bus_space_tag_t iot, memt;
142 {
143 	bus_space_handle_t memh, ioh_6845;
144 	u_int16_t oldval, val;
145 
146 	if (bus_space_map(memt, 0xb8000, 0x8000, 0, &memh))
147 		return (0);
148 	oldval = bus_space_read_2(memt, memh, 0);
149 	bus_space_write_2(memt, memh, 0, 0xa55a);
150 	val = bus_space_read_2(memt, memh, 0);
151 	bus_space_write_2(memt, memh, 0, oldval);
152 	bus_space_unmap(memt, memh, 0x8000);
153 	if (val != 0xa55a)
154 		return (0);
155 
156 	if (bus_space_map(iot, 0x3d0, 0x10, 0, &ioh_6845))
157 		return (0);
158 	bus_space_unmap(iot, ioh_6845, 0x10);
159 
160 	return (1);
161 }
162 
163 static int
164 pcdisplay_probe_mono(iot, memt)
165 	bus_space_tag_t iot, memt;
166 {
167 	bus_space_handle_t memh, ioh_6845;
168 	u_int16_t oldval, val;
169 
170 	if (bus_space_map(memt, 0xb0000, 0x8000, 0, &memh))
171 		return (0);
172 	oldval = bus_space_read_2(memt, memh, 0);
173 	bus_space_write_2(memt, memh, 0, 0xa55a);
174 	val = bus_space_read_2(memt, memh, 0);
175 	bus_space_write_2(memt, memh, 0, oldval);
176 	bus_space_unmap(memt, memh, 0x8000);
177 	if (val != 0xa55a)
178 		return (0);
179 
180 	if (bus_space_map(iot, 0x3b0, 0x10, 0, &ioh_6845))
181 		return (0);
182 	bus_space_unmap(iot, ioh_6845, 0x10);
183 
184 	return (1);
185 }
186 
187 static void
188 pcdisplay_init(dc, iot, memt, mono)
189 	struct pcdisplay_config *dc;
190 	bus_space_tag_t iot, memt;
191 	int mono;
192 {
193 	struct pcdisplay_handle *ph = &dc->dc_ph;
194 	int cpos;
195 
196         ph->ph_iot = iot;
197         ph->ph_memt = memt;
198 	dc->mono = mono;
199 
200 	if (bus_space_map(memt, mono ? 0xb0000 : 0xb8000, 0x8000,
201 			  0, &ph->ph_memh))
202 		panic("pcdisplay_init: cannot map memory");
203 	if (bus_space_map(iot, mono ? 0x3b0 : 0x3d0, 0x10,
204 			  0, &ph->ph_ioh_6845))
205 		panic("pcdisplay_init: cannot map io");
206 
207 	/*
208 	 * initialize the only screen
209 	 */
210 	dc->pcs.hdl = ph;
211 	dc->pcs.type = &pcdisplay_scr;
212 	dc->pcs.active = 1;
213 	dc->pcs.mem = NULL;
214 
215 	cpos = pcdisplay_6845_read(ph, cursorh) << 8;
216 	cpos |= pcdisplay_6845_read(ph, cursorl);
217 
218 	/* make sure we have a valid cursor position */
219 	if (cpos < 0 || cpos >= pcdisplay_scr.nrows * pcdisplay_scr.ncols)
220 		cpos = 0;
221 
222 	dc->pcs.dispoffset = 0;
223 
224 	dc->pcs.vc_crow = cpos / pcdisplay_scr.ncols;
225 	dc->pcs.vc_ccol = cpos % pcdisplay_scr.ncols;
226 	pcdisplay_cursor_init(&dc->pcs, 1);
227 }
228 
229 int
230 pcdisplay_match(parent, match, aux)
231 	struct device *parent;
232 	struct cfdata *match;
233 	void *aux;
234 {
235 	struct isa_attach_args *ia = aux;
236 	int mono;
237 
238 	if (ISA_DIRECT_CONFIG(ia))
239 		return (0);
240 
241 	/* If values are hardwired to something that they can't be, punt. */
242 	if (ia->ia_nio < 1 ||
243 	    (ia->ia_io[0].ir_addr != ISACF_PORT_DEFAULT &&
244 	     ia->ia_io[0].ir_addr != 0x3d0 &&
245 	     ia->ia_io[0].ir_addr != 0x3b0))
246 		return (0);
247 
248 	if (ia->ia_niomem < 1 ||
249 	    (ia->ia_iomem[0].ir_addr != ISACF_IOMEM_DEFAULT &&
250 	     ia->ia_iomem[0].ir_addr != 0xb8000 &&
251 	     ia->ia_iomem[0].ir_addr != 0xb0000))
252 		return (0);
253 	if (ia->ia_iomem[0].ir_size != 0 &&
254 	    ia->ia_iomem[0].ir_size != 0x8000)
255 		return (0);
256 
257 	if (ia->ia_nirq > 0 &&
258 	    ia->ia_irq[0].ir_irq != ISACF_IRQ_DEFAULT)
259 		return (0);
260 
261 	if (ia->ia_ndrq > 0 &&
262 	    ia->ia_drq[0].ir_drq != ISACF_DRQ_DEFAULT)
263 		return (0);
264 
265 	if (pcdisplay_is_console(ia->ia_iot))
266 		mono = pcdisplay_console_dc.mono;
267 	else if (ia->ia_io[0].ir_addr != 0x3b0 &&
268 		 ia->ia_iomem[0].ir_addr != 0xb0000 &&
269 		 pcdisplay_probe_col(ia->ia_iot, ia->ia_memt))
270 		mono = 0;
271 	else if (ia->ia_io[0].ir_addr != 0x3d0 &&
272 		 ia->ia_iomem[0].ir_addr != 0xb8000 &&
273 		 pcdisplay_probe_mono(ia->ia_iot, ia->ia_memt))
274 		mono = 1;
275 	else
276 		return (0);
277 
278 	ia->ia_nio = 1;
279 	ia->ia_io[0].ir_addr = mono ? 0x3b0 : 0x3d0;
280 	ia->ia_io[0].ir_size = 0x10;
281 
282 	ia->ia_niomem = 1;
283 	ia->ia_iomem[0].ir_size = mono ? 0xb0000 : 0xb8000;
284 	ia->ia_iomem[0].ir_size = 0x8000;
285 
286 	ia->ia_nirq = 0;
287 	ia->ia_ndrq = 0;
288 
289 	return (1);
290 }
291 
292 void
293 pcdisplay_attach(parent, self, aux)
294 	struct device *parent, *self;
295 	void *aux;
296 {
297 	struct isa_attach_args *ia = aux;
298 	struct pcdisplay_softc *sc = (struct pcdisplay_softc *)self;
299 	int console;
300 	struct pcdisplay_config *dc;
301 	struct wsemuldisplaydev_attach_args aa;
302 
303 	printf("\n");
304 
305 	console = pcdisplay_is_console(ia->ia_iot);
306 
307 	if (console) {
308 		dc = &pcdisplay_console_dc;
309 		sc->nscreens = 1;
310 		pcdisplay_console_attached = 1;
311 	} else {
312 		dc = malloc(sizeof(struct pcdisplay_config),
313 			    M_DEVBUF, M_WAITOK);
314 		if (ia->ia_io[0].ir_addr != 0x3b0 &&
315 		    ia->ia_iomem[0].ir_addr != 0xb0000 &&
316 		    pcdisplay_probe_col(ia->ia_iot, ia->ia_memt))
317 			pcdisplay_init(dc, ia->ia_iot, ia->ia_memt, 0);
318 		else if (ia->ia_io[0].ir_addr != 0x3d0 &&
319 			 ia->ia_iomem[0].ir_addr != 0xb8000 &&
320 			 pcdisplay_probe_mono(ia->ia_iot, ia->ia_memt))
321 			pcdisplay_init(dc, ia->ia_iot, ia->ia_memt, 1);
322 		else
323 			panic("pcdisplay_attach: display disappeared");
324 	}
325 	sc->sc_dc = dc;
326 
327 #if NPCWEASEL > 0
328 	/*
329 	 * If the display is monochrome, check to see if we have
330 	 * a PC-Weasel, and initialize its special features.
331 	 */
332 	if (dc->mono) {
333 		sc->sc_weasel.wh_st = dc->dc_ph.ph_memt;
334 		sc->sc_weasel.wh_sh = dc->dc_ph.ph_memh;
335 		sc->sc_weasel.wh_parent = &sc->sc_dev;
336 		weasel_isa_init(&sc->sc_weasel);
337 	}
338 #endif /* NPCWEASEL > 0 */
339 
340 	aa.console = console;
341 	aa.scrdata = &pcdisplay_screenlist;
342 	aa.accessops = &pcdisplay_accessops;
343 	aa.accesscookie = sc;
344 
345         config_found(self, &aa, wsemuldisplaydevprint);
346 }
347 
348 
349 int
350 pcdisplay_cnattach(iot, memt)
351 	bus_space_tag_t iot, memt;
352 {
353 	int mono;
354 
355 	if (pcdisplay_probe_col(iot, memt))
356 		mono = 0;
357 	else if (pcdisplay_probe_mono(iot, memt))
358 		mono = 1;
359 	else
360 		return (ENXIO);
361 
362 	pcdisplay_init(&pcdisplay_console_dc, iot, memt, mono);
363 
364 	wsdisplay_cnattach(&pcdisplay_scr, &pcdisplay_console_dc,
365 			   pcdisplay_console_dc.pcs.vc_ccol,
366 			   pcdisplay_console_dc.pcs.vc_crow,
367 			   FG_LIGHTGREY | BG_BLACK);
368 
369 	pcdisplayconsole = 1;
370 	return (0);
371 }
372 
373 static int
374 pcdisplay_is_console(iot)
375 	bus_space_tag_t iot;
376 {
377 	if (pcdisplayconsole &&
378 	    !pcdisplay_console_attached &&
379 	    iot == pcdisplay_console_dc.dc_ph.ph_iot)
380 		return (1);
381 	return (0);
382 }
383 
384 static int
385 pcdisplay_ioctl(v, cmd, data, flag, p)
386 	void *v;
387 	u_long cmd;
388 	caddr_t data;
389 	int flag;
390 	struct proc *p;
391 {
392 	/*
393 	 * XXX "do something!"
394 	 */
395 	return (EPASSTHROUGH);
396 }
397 
398 static paddr_t
399 pcdisplay_mmap(v, offset, prot)
400 	void *v;
401 	off_t offset;
402 	int prot;
403 {
404 	return (-1);
405 }
406 
407 static int
408 pcdisplay_alloc_screen(v, type, cookiep, curxp, curyp, defattrp)
409 	void *v;
410 	const struct wsscreen_descr *type;
411 	void **cookiep;
412 	int *curxp, *curyp;
413 	long *defattrp;
414 {
415 	struct pcdisplay_softc *sc = v;
416 
417 	if (sc->nscreens > 0)
418 		return (ENOMEM);
419 
420 	*cookiep = sc->sc_dc;
421 	*curxp = 0;
422 	*curyp = 0;
423 	*defattrp = FG_LIGHTGREY | BG_BLACK;
424 	sc->nscreens++;
425 	return (0);
426 }
427 
428 static void
429 pcdisplay_free_screen(v, cookie)
430 	void *v;
431 	void *cookie;
432 {
433 	struct pcdisplay_softc *sc = v;
434 
435 	if (sc->sc_dc == &pcdisplay_console_dc)
436 		panic("pcdisplay_free_screen: console");
437 
438 	sc->nscreens--;
439 }
440 
441 static int
442 pcdisplay_show_screen(v, cookie, waitok, cb, cbarg)
443 	void *v;
444 	void *cookie;
445 	int waitok;
446 	void (*cb) __P((void *, int, int));
447 	void *cbarg;
448 {
449 #ifdef DIAGNOSTIC
450 	struct pcdisplay_softc *sc = v;
451 
452 	if (cookie != sc->sc_dc)
453 		panic("pcdisplay_show_screen: bad screen");
454 #endif
455 	return (0);
456 }
457 
458 static int
459 pcdisplay_alloc_attr(id, fg, bg, flags, attrp)
460 	void *id;
461 	int fg, bg;
462 	int flags;
463 	long *attrp;
464 {
465 	if (flags & WSATTR_REVERSE)
466 		*attrp = FG_BLACK | BG_LIGHTGREY;
467 	else
468 		*attrp = FG_LIGHTGREY | BG_BLACK;
469 	return (0);
470 }
471