1 | /* $NetBSD: vga_subr.c,v 1.25 2012/08/09 20:25:05 uwe 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 | * |
16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * |
27 | */ |
28 | |
29 | #include <sys/cdefs.h> |
30 | __KERNEL_RCSID(0, "$NetBSD: vga_subr.c,v 1.25 2012/08/09 20:25:05 uwe Exp $" ); |
31 | |
32 | /* for WSDISPLAY_BORDER_COLOR */ |
33 | #include "opt_wsdisplay_border.h" |
34 | |
35 | #include <sys/param.h> |
36 | #include <sys/systm.h> |
37 | #include <sys/device.h> |
38 | #include <sys/queue.h> |
39 | #include <sys/bus.h> |
40 | |
41 | #include <dev/ic/mc6845reg.h> |
42 | #include <dev/ic/pcdisplay.h> |
43 | #include <dev/ic/pcdisplayvar.h> |
44 | #include <dev/ic/vgareg.h> |
45 | #include <dev/ic/vgavar.h> |
46 | |
47 | #include <dev/wscons/wsdisplayvar.h> |
48 | |
49 | static void fontram(struct vga_handle *); |
50 | static void textram(struct vga_handle *); |
51 | |
52 | static void |
53 | fontram(struct vga_handle *vh) |
54 | { |
55 | |
56 | /* program sequencer to access character generator */ |
57 | |
58 | vga_ts_write(vh, syncreset, 0x01); /* synchronous reset */ |
59 | vga_ts_write(vh, wrplmask, 0x04); /* write to map 2 */ |
60 | vga_ts_write(vh, memmode, 0x07); /* sequential addressing */ |
61 | vga_ts_write(vh, syncreset, 0x03); /* clear synchronous reset */ |
62 | |
63 | /* program graphics controller to access character generator */ |
64 | |
65 | vga_gdc_write(vh, rdplanesel, 0x02); /* select map 2 for CPU reads */ |
66 | vga_gdc_write(vh, mode, 0x00); /* disable odd-even addressing */ |
67 | vga_gdc_write(vh, misc, 0x04); /* map starts at 0xA000 */ |
68 | } |
69 | |
70 | static void |
71 | (struct vga_handle *vh) |
72 | { |
73 | |
74 | /* program sequencer to access video ram */ |
75 | |
76 | vga_ts_write(vh, syncreset, 0x01); /* synchronous reset */ |
77 | vga_ts_write(vh, wrplmask, 0x03); /* write to map 0 & 1 */ |
78 | vga_ts_write(vh, memmode, 0x03); /* odd-even addressing */ |
79 | vga_ts_write(vh, syncreset, 0x03); /* clear synchronous reset */ |
80 | |
81 | /* program graphics controller for text mode */ |
82 | |
83 | vga_gdc_write(vh, rdplanesel, 0x00); /* select map 0 for CPU reads */ |
84 | vga_gdc_write(vh, mode, 0x10); /* enable odd-even addressing */ |
85 | /* map starts at 0xb800 or 0xb000 (mono) */ |
86 | vga_gdc_write(vh, misc, (vh->vh_mono ? 0x0a : 0x0e)); |
87 | } |
88 | |
89 | #ifndef VGA_RASTERCONSOLE |
90 | void |
91 | vga_loadchars(struct vga_handle *vh, int fontset, int first, int num, int lpc, |
92 | const char *data) |
93 | { |
94 | int offset, i, j, s; |
95 | |
96 | /* fontset number swizzle done in vga_setfontset() */ |
97 | offset = (fontset << 13) | (first << 5); |
98 | |
99 | s = splhigh(); |
100 | fontram(vh); |
101 | |
102 | for (i = 0; i < num; i++) |
103 | for (j = 0; j < lpc; j++) |
104 | bus_space_write_1(vh->vh_memt, vh->vh_allmemh, |
105 | offset + (i << 5) + j, data[i * lpc + j]); |
106 | |
107 | textram(vh); |
108 | splx(s); |
109 | } |
110 | |
111 | void |
112 | vga_readoutchars(struct vga_handle *vh, int fontset, int first, int num, |
113 | int lpc, char *data) |
114 | { |
115 | int offset, i, j, s; |
116 | |
117 | /* fontset number swizzle done in vga_setfontset() */ |
118 | offset = (fontset << 13) | (first << 5); |
119 | |
120 | s = splhigh(); |
121 | fontram(vh); |
122 | |
123 | for (i = 0; i < num; i++) |
124 | for (j = 0; j < lpc; j++) |
125 | data[i * lpc + j] = bus_space_read_1(vh->vh_memt, |
126 | vh->vh_allmemh, offset + (i << 5) + j); |
127 | |
128 | textram(vh); |
129 | splx(s); |
130 | } |
131 | |
132 | #ifdef VGA_CONSOLE_ATI_BROKEN_FONTSEL |
133 | void |
134 | vga_copyfont01(struct vga_handle *vh) |
135 | { |
136 | int s; |
137 | |
138 | s = splhigh(); |
139 | fontram(vh); |
140 | |
141 | bus_space_copy_region_1(vh->vh_memt, vh->vh_allmemh, 0, |
142 | vh->vh_allmemh, 1 << 13, 1 << 13); |
143 | |
144 | textram(vh); |
145 | splx(s); |
146 | } |
147 | #endif |
148 | |
149 | void |
150 | vga_setfontset(struct vga_handle *vh, int fontset1, int fontset2) |
151 | { |
152 | uint8_t cmap; |
153 | static const uint8_t cmaptaba[] = { |
154 | 0x00, 0x10, 0x01, 0x11, |
155 | 0x02, 0x12, 0x03, 0x13 |
156 | }; |
157 | static const uint8_t cmaptabb[] = { |
158 | 0x00, 0x20, 0x04, 0x24, |
159 | 0x08, 0x28, 0x0c, 0x2c |
160 | }; |
161 | |
162 | /* extended font if fontset1 != fontset2 */ |
163 | cmap = cmaptaba[fontset1] | cmaptabb[fontset2]; |
164 | |
165 | vga_ts_write(vh, fontsel, cmap); |
166 | } |
167 | |
168 | void |
169 | vga_setscreentype(struct vga_handle *vh, const struct wsscreen_descr *type) |
170 | { |
171 | |
172 | vga_6845_write(vh, maxrow, type->fontheight - 1); |
173 | |
174 | /* lo byte */ |
175 | vga_6845_write(vh, vde, type->fontheight * type->nrows - 1); |
176 | |
177 | #ifndef PCDISPLAY_SOFTCURSOR |
178 | /* set cursor to last 2 lines */ |
179 | vga_6845_write(vh, curstart, type->fontheight - 2); |
180 | vga_6845_write(vh, curend, type->fontheight - 1); |
181 | #endif |
182 | /* |
183 | * disable colour plane 3 if needed for font selection |
184 | */ |
185 | if (type->capabilities & WSSCREEN_HILIT) { |
186 | /* |
187 | * these are the screens which don't support |
188 | * 512-character fonts |
189 | */ |
190 | vga_attr_write(vh, colplen, 0x0f); |
191 | } else |
192 | vga_attr_write(vh, colplen, 0x07); |
193 | } |
194 | |
195 | #else /* !VGA_RASTERCONSOLE */ |
196 | void |
197 | vga_load_builtinfont(struct vga_handle *vh, uint8_t *font, int firstchar, |
198 | int numchars) |
199 | { |
200 | int i, s; |
201 | |
202 | s = splhigh(); |
203 | fontram(vh); |
204 | |
205 | for (i = firstchar; i < firstchar + numchars; i++) |
206 | bus_space_read_region_1(vh->vh_memt, vh->vh_allmemh, i * 32, |
207 | font + i * 16, 16); |
208 | |
209 | textram(vh); |
210 | splx(s); |
211 | } |
212 | #endif /* !VGA_RASTERCONSOLE */ |
213 | |
214 | /* |
215 | * vga_reset(): |
216 | * Reset VGA registers to put it into 80x25 text mode. (mode 3) |
217 | * This function should be called from MD consinit() on ports |
218 | * whose firmware does not use text mode at boot time. |
219 | */ |
220 | void |
221 | vga_reset(struct vga_handle *vh, void (*md_initfunc)(struct vga_handle *)) |
222 | { |
223 | uint8_t reg; |
224 | |
225 | if (bus_space_map(vh->vh_iot, 0x3c0, 0x10, 0, &vh->vh_ioh_vga)) |
226 | return; |
227 | |
228 | reg = vga_raw_read(vh, VGA_MISC_DATAR); |
229 | vh->vh_mono = !(reg & 0x01); |
230 | |
231 | if (bus_space_map(vh->vh_iot, vh->vh_mono ? 0x3b0 : 0x3d0, 0x10, |
232 | 0, &vh->vh_ioh_6845)) |
233 | goto out1; |
234 | |
235 | if (bus_space_map(vh->vh_memt, 0xa0000, 0x20000, 0, &vh->vh_allmemh)) |
236 | goto out2; |
237 | |
238 | if (bus_space_subregion(vh->vh_memt, vh->vh_allmemh, |
239 | vh->vh_mono ? 0x10000 : 0x18000, 0x8000, &vh->vh_memh)) |
240 | goto out3; |
241 | |
242 | /* check if VGA already in text mode. */ |
243 | if ((vga_gdc_read(vh, misc) & 0x01) == 0) |
244 | goto out3; |
245 | |
246 | /* initialize common VGA registers */ |
247 | vga_initregs(vh); |
248 | |
249 | /* initialize chipset specific registers */ |
250 | if (md_initfunc != NULL) |
251 | (*md_initfunc)(vh); |
252 | |
253 | delay(10000); |
254 | |
255 | /* clear text buffer RAM */ |
256 | bus_space_set_region_2(vh->vh_memt, vh->vh_memh, 0, |
257 | ((BG_BLACK | FG_LIGHTGREY) << 8) | ' ', 80 * 25 /*XXX*/); |
258 | |
259 | out3: |
260 | bus_space_unmap(vh->vh_memt, vh->vh_allmemh, 0x20000); |
261 | out2: |
262 | bus_space_unmap(vh->vh_iot, vh->vh_ioh_6845, 0x10); |
263 | out1: |
264 | bus_space_unmap(vh->vh_iot, vh->vh_ioh_vga, 0x10); |
265 | } |
266 | |
267 | /* |
268 | * values to initialize registers. |
269 | */ |
270 | |
271 | /* miscellaneous output register */ |
272 | #define VGA_MISCOUT 0x66 |
273 | |
274 | /* sequencer registers */ |
275 | static const uint8_t vga_ts[] = { |
276 | 0x03, /* 00: reset */ |
277 | 0x00, /* 01: clocking mode */ |
278 | 0x03, /* 02: map mask */ |
279 | 0x00, /* 03: character map select */ |
280 | 0x02 /* 04: memory mode */ |
281 | }; |
282 | |
283 | /* CRT controller registers */ |
284 | static const uint8_t vga_crtc[] = { |
285 | 0x5f, /* 00: horizontal total */ |
286 | 0x4f, /* 01: horizontal display-enable end */ |
287 | 0x50, /* 02: start horizontal blanking */ |
288 | 0x82, /* 03: display skew control / end horizontal blanking */ |
289 | 0x55, /* 04: start horizontal retrace pulse */ |
290 | 0x81, /* 05: horizontal retrace delay / end horizontal retrace */ |
291 | 0xbf, /* 06: vertical total */ |
292 | 0x1f, /* 07: overflow register */ |
293 | 0x00, /* 08: preset row scan */ |
294 | 0x4f, /* 09: overflow / maximum scan line */ |
295 | 0x0d, /* 0A: cursor off / cursor start */ |
296 | 0x0e, /* 0B: cursor skew / cursor end */ |
297 | 0x00, /* 0C: start regenerative buffer address high */ |
298 | 0x00, /* 0D: start regenerative buffer address low */ |
299 | 0x00, /* 0E: cursor location high */ |
300 | 0x00, /* 0F: cursor location low */ |
301 | 0x9c, /* 10: vertical retrace start */ |
302 | 0x8e, /* 11: vertical interrupt / vertical retrace end */ |
303 | 0x8f, /* 12: vertical display enable end */ |
304 | 0x28, /* 13: logical line width */ |
305 | 0x00, /* 14: underline location */ |
306 | 0x96, /* 15: start vertical blanking */ |
307 | 0xb9, /* 16: end vertical blanking */ |
308 | 0xa3, /* 17: CRT mode control */ |
309 | 0xff /* 18: line compare */ |
310 | }; |
311 | |
312 | /* graphics controller registers */ |
313 | static const uint8_t vga_gdc[] = { |
314 | 0x00, /* 00: set/reset map */ |
315 | 0x00, /* 01: enable set/reset */ |
316 | 0x00, /* 02: color compare */ |
317 | 0x00, /* 03: data rotate */ |
318 | 0x00, /* 04: read map select */ |
319 | 0x10, /* 05: graphics mode */ |
320 | 0x0e, /* 06: miscellaneous */ |
321 | 0x00, /* 07: color don't care */ |
322 | 0xff /* 08: bit mask */ |
323 | }; |
324 | |
325 | /* attribute controller registers */ |
326 | static const uint8_t vga_atc[] = { |
327 | 0x00, /* 00: internal palette 0 */ |
328 | 0x01, /* 01: internal palette 1 */ |
329 | 0x02, /* 02: internal palette 2 */ |
330 | 0x03, /* 03: internal palette 3 */ |
331 | 0x04, /* 04: internal palette 4 */ |
332 | 0x05, /* 05: internal palette 5 */ |
333 | 0x14, /* 06: internal palette 6 */ |
334 | 0x07, /* 07: internal palette 7 */ |
335 | 0x38, /* 08: internal palette 8 */ |
336 | 0x39, /* 09: internal palette 9 */ |
337 | 0x3a, /* 0A: internal palette 10 */ |
338 | 0x3b, /* 0B: internal palette 11 */ |
339 | 0x3c, /* 0C: internal palette 12 */ |
340 | 0x3d, /* 0D: internal palette 13 */ |
341 | 0x3e, /* 0E: internal palette 14 */ |
342 | 0x3f, /* 0F: internal palette 15 */ |
343 | 0x0c, /* 10: attribute mode control */ |
344 | WSDISPLAY_BORDER_COLOR, /* 11: overscan color */ |
345 | 0x0f, /* 12: color plane enable */ |
346 | 0x08, /* 13: horizontal PEL panning */ |
347 | 0x00 /* 14: color select */ |
348 | }; |
349 | |
350 | /* video DAC palette registers */ |
351 | /* XXX only set up 16 colors used by internal palette in ATC regsters */ |
352 | static const uint8_t vga_dacpal[] = { |
353 | /* R G B */ |
354 | 0x00, 0x00, 0x00, /* BLACK */ |
355 | 0x00, 0x00, 0x2a, /* BLUE */ |
356 | 0x00, 0x2a, 0x00, /* GREEN */ |
357 | 0x00, 0x2a, 0x2a, /* CYAN */ |
358 | 0x2a, 0x00, 0x00, /* RED */ |
359 | 0x2a, 0x00, 0x2a, /* MAGENTA */ |
360 | 0x2a, 0x15, 0x00, /* BROWN */ |
361 | 0x2a, 0x2a, 0x2a, /* LIGHTGREY */ |
362 | 0x15, 0x15, 0x15, /* DARKGREY */ |
363 | 0x15, 0x15, 0x3f, /* LIGHTBLUE */ |
364 | 0x15, 0x3f, 0x15, /* LIGHTGREEN */ |
365 | 0x15, 0x3f, 0x3f, /* LIGHTCYAN */ |
366 | 0x3f, 0x15, 0x15, /* LIGHTRED */ |
367 | 0x3f, 0x15, 0x3f, /* LIGHTMAGENTA */ |
368 | 0x3f, 0x3f, 0x15, /* YELLOW */ |
369 | 0x3f, 0x3f, 0x3f /* WHITE */ |
370 | }; |
371 | |
372 | void |
373 | vga_initregs(struct vga_handle *vh) |
374 | { |
375 | int i; |
376 | |
377 | /* disable video */ |
378 | vga_ts_write(vh, mode, vga_ts[1] | VGA_TS_MODE_BLANK); |
379 | |
380 | /* synchronous reset */ |
381 | vga_ts_write(vh, syncreset, 0x01); |
382 | /* set TS regsters */ |
383 | for (i = 2; i < VGA_TS_NREGS; i++) |
384 | _vga_ts_write(vh, i, vga_ts[i]); |
385 | /* clear synchronous reset */ |
386 | vga_ts_write(vh, syncreset, 0x03); |
387 | |
388 | /* unprotect CRTC regsters */ |
389 | vga_6845_write(vh, vsynce, vga_6845_read(vh, vsynce) & ~0x80); |
390 | /* set CRTC regsters */ |
391 | for (i = 0; i < MC6845_NREGS; i++) |
392 | _vga_6845_write(vh, i, vga_crtc[i]); |
393 | |
394 | /* set GDC regsters */ |
395 | for (i = 0; i < VGA_GDC_NREGS; i++) |
396 | _vga_gdc_write(vh, i, vga_gdc[i]); |
397 | |
398 | /* set ATC regsters */ |
399 | for (i = 0; i < VGA_ATC_NREGS; i++) |
400 | _vga_attr_write(vh, i, vga_atc[i]); |
401 | |
402 | /* set DAC palette */ |
403 | if (!vh->vh_mono) { |
404 | for (i = 0; i < 16; i++) { |
405 | vga_raw_write(vh, |
406 | VGA_DAC_ADDRW, vga_atc[i]); |
407 | vga_raw_write(vh, |
408 | VGA_DAC_PALETTE, vga_dacpal[i * 3 + 0]); |
409 | vga_raw_write(vh, |
410 | VGA_DAC_PALETTE, vga_dacpal[i * 3 + 1]); |
411 | vga_raw_write(vh, |
412 | VGA_DAC_PALETTE, vga_dacpal[i * 3 + 2]); |
413 | } |
414 | } |
415 | |
416 | /* set misc output register */ |
417 | vga_raw_write(vh, |
418 | VGA_MISC_DATAW, VGA_MISCOUT | (vh->vh_mono ? 0 : 0x01)); |
419 | |
420 | /* reenable video */ |
421 | vga_ts_write(vh, mode, vga_ts[1] & ~VGA_TS_MODE_BLANK); |
422 | } |
423 | |