1 /* $NetBSD: xafb.c,v 1.21 2021/08/07 16:19:01 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2000 Tsubai Masanari. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 /* "xa" frame buffer driver. Currently supports 1280x1024x8 only. */
30
31 #include <sys/cdefs.h>
32 __KERNEL_RCSID(0, "$NetBSD: xafb.c,v 1.21 2021/08/07 16:19:01 thorpej Exp $");
33
34 #include <sys/param.h>
35 #include <sys/buf.h>
36 #include <sys/device.h>
37 #include <sys/ioctl.h>
38 #include <sys/kmem.h>
39 #include <sys/systm.h>
40
41 #include <uvm/uvm_extern.h>
42
43 #include <mips/locore.h>
44
45 #include <machine/adrsmap.h>
46 #include <machine/apcall.h>
47 #include <machine/wsconsio.h>
48
49 #include <dev/wscons/wsdisplayvar.h>
50 #include <dev/rasops/rasops.h>
51
52 #include <newsmips/apbus/apbusvar.h>
53
54 struct xafb_reg {
55 volatile uint32_t r0;
56 volatile uint32_t index;
57 volatile uint32_t r2;
58 volatile uint32_t zero;
59 volatile uint32_t r4;
60 volatile uint32_t r5;
61 volatile uint32_t r6;
62 volatile uint32_t rgb;
63 };
64
65 struct xafb_devconfig {
66 uint8_t *dc_fbbase; /* VRAM base address */
67 paddr_t dc_fbpaddr; /* VRAM physical address */
68 struct xafb_reg *dc_reg; /* register address */
69 struct rasops_info dc_ri;
70 };
71
72 struct xafb_softc {
73 device_t sc_dev;
74 struct xafb_devconfig *sc_dc;
75 int sc_nscreens;
76 uint8_t sc_cmap_red[256];
77 uint8_t sc_cmap_green[256];
78 uint8_t sc_cmap_blue[256];
79 };
80
81 int xafb_match(device_t, cfdata_t, void *);
82 void xafb_attach(device_t, device_t, void *);
83
84 int xafb_common_init(struct xafb_devconfig *);
85 int xafb_is_console(void);
86
87 int xafb_ioctl(void *, void *, u_long, void *, int, struct lwp *);
88 paddr_t xafb_mmap(void *, void *, off_t, int);
89 int xafb_alloc_screen(void *, const struct wsscreen_descr *, void **, int *,
90 int *, long *);
91 void xafb_free_screen(void *, void *);
92 int xafb_show_screen(void *, void *, int, void (*) (void *, int, int), void *);
93
94 int xafb_cnattach(void);
95 int xafb_getcmap(struct xafb_softc *, struct wsdisplay_cmap *);
96 int xafb_putcmap(struct xafb_softc *, struct wsdisplay_cmap *);
97
98 static inline void xafb_setcolor(struct xafb_devconfig *, int, int, int, int);
99
100 CFATTACH_DECL_NEW(xafb, sizeof(struct xafb_softc),
101 xafb_match, xafb_attach, NULL, NULL);
102
103 struct xafb_devconfig xafb_console_dc;
104
105 struct wsdisplay_accessops xafb_accessops = {
106 xafb_ioctl,
107 xafb_mmap,
108 xafb_alloc_screen,
109 xafb_free_screen,
110 xafb_show_screen,
111 NULL /* load_font */
112 };
113
114 struct wsscreen_descr xafb_stdscreen = {
115 "std",
116 0, 0,
117 0,
118 0, 0,
119 WSSCREEN_REVERSE
120 };
121
122 const struct wsscreen_descr *xafb_scrlist[] = {
123 &xafb_stdscreen
124 };
125
126 struct wsscreen_list xafb_screenlist = {
127 __arraycount(xafb_scrlist), xafb_scrlist
128 };
129
130 int
xafb_match(device_t parent,cfdata_t cf,void * aux)131 xafb_match(device_t parent, cfdata_t cf, void *aux)
132 {
133 struct apbus_attach_args *apa = aux;
134
135 if (strcmp(apa->apa_name, "xa") != 0)
136 return 0;
137
138 return 1;
139 }
140
141 void
xafb_attach(device_t parent,device_t self,void * aux)142 xafb_attach(device_t parent, device_t self, void *aux)
143 {
144 struct xafb_softc *sc = device_private(self);
145 struct apbus_attach_args *apa = aux;
146 struct wsemuldisplaydev_attach_args wsa;
147 struct xafb_devconfig *dc;
148 struct rasops_info *ri;
149 int console, i;
150
151 sc->sc_dev = self;
152 console = xafb_is_console();
153
154 if (console) {
155 dc = &xafb_console_dc;
156 ri = &dc->dc_ri;
157 ri->ri_flg &= ~RI_NO_AUTO;
158 sc->sc_nscreens = 1;
159 } else {
160 dc = kmem_zalloc(sizeof(struct xafb_devconfig), KM_SLEEP);
161 dc->dc_fbpaddr = (paddr_t)0x10000000;
162 dc->dc_fbbase = (void *)MIPS_PHYS_TO_KSEG1(dc->dc_fbpaddr);
163 dc->dc_reg = (void *)(apa->apa_hwbase + 0x3000);
164 if (xafb_common_init(dc) != 0) {
165 aprint_error(": couldn't initialize device\n");
166 return;
167 }
168
169 ri = &dc->dc_ri;
170
171 /* clear screen */
172 (*ri->ri_ops.eraserows)(ri, 0, ri->ri_rows, 0);
173 }
174 sc->sc_dc = dc;
175
176 for (i = 0; i < 256; i++) {
177 sc->sc_cmap_red[i] = i;
178 sc->sc_cmap_green[i] = i;
179 sc->sc_cmap_blue[i] = i;
180 }
181
182 aprint_normal(": %d x %d, %dbpp\n",
183 ri->ri_width, ri->ri_height, ri->ri_depth);
184
185 wsa.console = console;
186 wsa.scrdata = &xafb_screenlist;
187 wsa.accessops = &xafb_accessops;
188 wsa.accesscookie = sc;
189
190 config_found(self, &wsa, wsemuldisplaydevprint, CFARGS_NONE);
191 }
192
193 void
xafb_setcolor(struct xafb_devconfig * dc,int index,int r,int g,int b)194 xafb_setcolor(struct xafb_devconfig *dc, int index, int r, int g, int b)
195 {
196 volatile struct xafb_reg *reg = dc->dc_reg;
197
198 reg->index = index;
199 reg->zero = 0;
200 reg->rgb = r;
201 reg->rgb = g;
202 reg->rgb = b;
203 }
204
205 int
xafb_common_init(struct xafb_devconfig * dc)206 xafb_common_init(struct xafb_devconfig *dc)
207 {
208 struct rasops_info *ri = &dc->dc_ri;
209 int i;
210
211 for (i = 0; i < 256; i++)
212 xafb_setcolor(dc, i, i, i, i);
213
214 /* initialize rasops */
215 ri->ri_width = 1280;
216 ri->ri_height = 1024;
217 ri->ri_depth = 8;
218 ri->ri_stride = 2048;
219 ri->ri_bits = (void *)dc->dc_fbbase;
220 ri->ri_flg = RI_FORCEMONO | RI_FULLCLEAR;
221 if (dc == &xafb_console_dc)
222 ri->ri_flg |= RI_NO_AUTO;
223
224 rasops_init(ri, 44, 100);
225
226 /* mono */
227 ri->ri_devcmap[0] = 0; /* bg */
228 ri->ri_devcmap[1] = 0xffffffff; /* fg */
229
230 xafb_stdscreen.nrows = ri->ri_rows;
231 xafb_stdscreen.ncols = ri->ri_cols;
232 xafb_stdscreen.textops = &ri->ri_ops;
233 xafb_stdscreen.capabilities = ri->ri_caps;
234
235 return 0;
236 }
237
238 int
xafb_is_console(void)239 xafb_is_console(void)
240 {
241 volatile uint32_t *dipsw = (void *)NEWS5000_DIP_SWITCH;
242
243 if (*dipsw & 1) /* XXX right? */
244 return 1;
245
246 return 0;
247 }
248
249 int
xafb_ioctl(void * v,void * vs,u_long cmd,void * data,int flag,struct lwp * l)250 xafb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, struct lwp *l)
251 {
252 struct xafb_softc *sc = v;
253 struct xafb_devconfig *dc = sc->sc_dc;
254 struct newsmips_wsdisplay_fbinfo *nwdf = (void *)data;
255 struct wsdisplay_fbinfo *wdf = (void *)data;
256
257 switch (cmd) {
258 case WSDISPLAYIO_GTYPE:
259 *(int *)data = WSDISPLAY_TYPE_UNKNOWN; /* XXX */
260 return 0;
261
262 case NEWSMIPS_WSDISPLAYIO_GINFO:
263 nwdf->stride = dc->dc_ri.ri_stride;
264 /* FALLTHROUGH */
265 case WSDISPLAYIO_GINFO:
266 wdf->height = dc->dc_ri.ri_height;
267 wdf->width = dc->dc_ri.ri_width;
268 wdf->depth = dc->dc_ri.ri_depth;
269 wdf->cmsize = 256;
270 return 0;
271
272 case WSDISPLAYIO_LINEBYTES:
273 *(u_int *)data = dc->dc_ri.ri_stride;
274 return 0;
275
276 case WSDISPLAYIO_GETCMAP:
277 return xafb_getcmap(sc, (struct wsdisplay_cmap *)data);
278
279 case WSDISPLAYIO_PUTCMAP:
280 return xafb_putcmap(sc, (struct wsdisplay_cmap *)data);
281
282 /* case WSDISPLAYIO_SVIDEO: */
283 }
284 return EPASSTHROUGH;
285 }
286
287 paddr_t
xafb_mmap(void * v,void * vs,off_t offset,int prot)288 xafb_mmap(void *v, void *vs, off_t offset, int prot)
289 {
290 struct xafb_softc *sc = v;
291 struct xafb_devconfig *dc = sc->sc_dc;
292 struct rasops_info *ri = &dc->dc_ri;
293
294 if (offset >= (ri->ri_stride * ri->ri_height) || offset < 0)
295 return -1;
296
297 return mips_btop(dc->dc_fbpaddr + offset);
298 }
299
300 int
xafb_alloc_screen(void * v,const struct wsscreen_descr * scrdesc,void ** cookiep,int * ccolp,int * crowp,long * attrp)301 xafb_alloc_screen(void *v, const struct wsscreen_descr *scrdesc,
302 void **cookiep, int *ccolp, int *crowp, long *attrp)
303 {
304 struct xafb_softc *sc = v;
305 struct rasops_info *ri = &sc->sc_dc->dc_ri;
306 long defattr;
307
308 if (sc->sc_nscreens > 0)
309 return ENOMEM;
310
311 *cookiep = ri;
312 *ccolp = *crowp = 0;
313 (*ri->ri_ops.allocattr)(ri, 0, 0, 0, &defattr);
314 *attrp = defattr;
315 sc->sc_nscreens++;
316
317 return 0;
318 }
319
320 void
xafb_free_screen(void * v,void * cookie)321 xafb_free_screen(void *v, void *cookie)
322 {
323 struct xafb_softc *sc = v;
324
325 if (sc->sc_dc == &xafb_console_dc)
326 panic("xafb_free_screen: console");
327
328 sc->sc_nscreens--;
329 }
330
331 int
xafb_show_screen(void * v,void * cookie,int waitok,void (* cb)(void *,int,int),void * cbarg)332 xafb_show_screen(void *v, void *cookie, int waitok,
333 void (*cb)(void *, int, int), void *cbarg)
334 {
335
336 return 0;
337 }
338
339 int
xafb_cnattach(void)340 xafb_cnattach(void)
341 {
342 struct xafb_devconfig *dc = &xafb_console_dc;
343 struct rasops_info *ri = &dc->dc_ri;
344 long defattr;
345 int crow = 0;
346
347 if (!xafb_is_console())
348 return -1;
349
350 dc->dc_fbpaddr = (paddr_t)0x10000000;
351 dc->dc_fbbase = (void *)MIPS_PHYS_TO_KSEG1(dc->dc_fbpaddr);
352 dc->dc_reg = (void *)0xb4903000; /* XXX */
353 xafb_common_init(dc);
354
355 crow = 0; /* XXX current cursor pos */
356
357 (*ri->ri_ops.allocattr)(ri, 0, 0, 0, &defattr);
358 wsdisplay_cnattach(&xafb_stdscreen, &dc->dc_ri, 0, crow, defattr);
359
360 return 0;
361 }
362
363 int
xafb_getcmap(struct xafb_softc * sc,struct wsdisplay_cmap * cm)364 xafb_getcmap(struct xafb_softc *sc, struct wsdisplay_cmap *cm)
365 {
366 u_int index = cm->index;
367 u_int count = cm->count;
368 int error;
369
370 if (index >= 256 || count > 256 || index + count > 256)
371 return EINVAL;
372
373 error = copyout(&sc->sc_cmap_red[index], cm->red, count);
374 if (error)
375 return error;
376 error = copyout(&sc->sc_cmap_green[index], cm->green, count);
377 if (error)
378 return error;
379 error = copyout(&sc->sc_cmap_blue[index], cm->blue, count);
380 if (error)
381 return error;
382
383 return 0;
384 }
385
386 int
xafb_putcmap(struct xafb_softc * sc,struct wsdisplay_cmap * cm)387 xafb_putcmap(struct xafb_softc *sc, struct wsdisplay_cmap *cm)
388 {
389 u_int index = cm->index;
390 u_int count = cm->count;
391 int i, error;
392 u_char rbuf[256], gbuf[256], bbuf[256];
393 u_char *r, *g, *b;
394
395 if (cm->index >= 256 || cm->count > 256 ||
396 (cm->index + cm->count) > 256)
397 return EINVAL;
398 error = copyin(cm->red, &rbuf[index], count);
399 if (error)
400 return error;
401 error = copyin(cm->green, &gbuf[index], count);
402 if (error)
403 return error;
404 error = copyin(cm->blue, &bbuf[index], count);
405 if (error)
406 return error;
407
408 memcpy(&sc->sc_cmap_red[index], &rbuf[index], count);
409 memcpy(&sc->sc_cmap_green[index], &gbuf[index], count);
410 memcpy(&sc->sc_cmap_blue[index], &bbuf[index], count);
411
412 r = &sc->sc_cmap_red[index];
413 g = &sc->sc_cmap_green[index];
414 b = &sc->sc_cmap_blue[index];
415 for (i = 0; i < count; i++)
416 xafb_setcolor(sc->sc_dc, index++, *r++, *g++, *b++);
417 return 0;
418 }
419