Annotation of sys/dev/sbus/agten.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: agten.c,v 1.7 2006/12/17 22:18:16 miod Exp $ */
2: /*
3: * Copyright (c) 2002, 2003, Miodrag Vallat.
4: * 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: *
15: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18: * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
19: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
20: * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21: * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
23: * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
24: * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
25: * POSSIBILITY OF SUCH DAMAGE.
26: *
27: */
28:
29: /*
30: * Fujitsu AG-10 framebuffer driver.
31: *
32: * The AG-10 is mostly made of:
33: * - a 3DLabs 300SX Glint chip, with two 6MB independent framebuffer spaces
34: * - a Number Nine Imagine 128 chip with its own 4MB framebuffer space
35: * - a Weitek P9100 with its own 2MB of framebuffer memory
36: * - an IBM PaletteDAC 561 ramdac
37: * - an Analog Devices ADSP-21062
38: *
39: * All of these chips (memory, registers, etc) are mapped in the SBus
40: * memory space associated to the board. What is unexpected, however, is
41: * that there are also PCI registers mappings for the first three chips!
42: *
43: * The three graphics chips act as overlays of each other, for the final
44: * video output.
45: *
46: * The PROM initialization will use the I128 framebuffer memory for output,
47: * which is ``above'' the P9100. The P9100 seems to only be there to provide
48: * a simple RAMDAC interface, but its frame buffer memory is accessible and
49: * will appear as an ``underlay'' plane.
50: */
51:
52: /*
53: * TODO
54: * - initialize the I128 in 32bit mode
55: * - use the i128 acceleration features
56: */
57:
58: #include <sys/param.h>
59: #include <sys/systm.h>
60: #include <sys/buf.h>
61: #include <sys/device.h>
62: #include <sys/ioctl.h>
63: #include <sys/malloc.h>
64: #include <sys/mman.h>
65: #include <sys/tty.h>
66: #include <sys/conf.h>
67:
68: #include <uvm/uvm_extern.h>
69:
70: #include <machine/autoconf.h>
71: #include <machine/pmap.h>
72: #include <machine/cpu.h>
73: #include <machine/conf.h>
74:
75: #include <dev/wscons/wsconsio.h>
76: #include <dev/wscons/wsdisplayvar.h>
77: #include <dev/rasops/rasops.h>
78: #include <machine/fbvar.h>
79:
80: #include <dev/ic/p9000.h>
81: #include <dev/ic/ibm561reg.h>
82:
83: #include <dev/sbus/sbusvar.h>
84:
85: struct agten_cmap {
86: u_int8_t cm_red[256];
87: u_int8_t cm_green[256];
88: u_int8_t cm_blue[256];
89: };
90:
91: /* per-display variables */
92: struct agten_softc {
93: struct sunfb sc_sunfb; /* common base part */
94:
95: bus_space_tag_t sc_bustag;
96: bus_addr_t sc_paddr;
97: off_t sc_physoffset; /* offset for frame buffer */
98:
99: volatile u_int8_t *sc_p9100;
100: struct agten_cmap sc_cmap; /* shadow color map */
101:
102: volatile u_int32_t *sc_i128_fb;
103:
104: int sc_nscreens;
105: };
106:
107: int agten_ioctl(void *, u_long, caddr_t, int, struct proc *);
108: int agten_alloc_screen(void *, const struct wsscreen_descr *, void **,
109: int *, int *, long *);
110: void agten_free_screen(void *, void *);
111: int agten_show_screen(void *, void *, int, void (*cb)(void *, int, int),
112: void *);
113: paddr_t agten_mmap(void *, off_t, int);
114: void agten_reset(struct agten_softc *);
115: void agten_setcolor(void *, u_int, u_int8_t, u_int8_t, u_int8_t);
116:
117: static __inline__ void ibm561_write(struct agten_softc *, u_int32_t, u_int32_t);
118: int agten_getcmap(struct agten_cmap *, struct wsdisplay_cmap *);
119: int agten_putcmap(struct agten_cmap *, struct wsdisplay_cmap *);
120: void agten_loadcmap(struct agten_softc *, u_int, u_int);
121:
122: struct wsdisplay_accessops agten_accessops = {
123: agten_ioctl,
124: agten_mmap,
125: agten_alloc_screen,
126: agten_free_screen,
127: agten_show_screen,
128: NULL, /* load_font */
129: NULL, /* scrollback */
130: NULL, /* getchar */
131: NULL, /* burner */
132: };
133:
134: int agtenmatch(struct device *, void *, void *);
135: void agtenattach(struct device *, struct device *, void *);
136:
137: struct cfattach agten_ca = {
138: sizeof(struct agten_softc), agtenmatch, agtenattach
139: };
140:
141: struct cfdriver agten_cd = {
142: NULL, "agten", DV_DULL
143: };
144:
145: int
146: agtenmatch(struct device *parent, void *vcf, void *aux)
147: {
148: struct sbus_attach_args *sa = aux;
149:
150: if (strcmp(sa->sa_name, "PFU,aga") != 0)
151: return (0);
152:
153: return (1);
154: }
155:
156: void
157: agtenattach(struct device *parent, struct device *self, void *args)
158: {
159: struct agten_softc *sc = (struct agten_softc *)self;
160: struct sbus_attach_args *sa = args;
161: bus_space_tag_t bt;
162: bus_space_handle_t bh;
163: int node, isconsole;
164: char *nam;
165:
166: bt = sa->sa_bustag;
167: node = sa->sa_node;
168: nam = getpropstring(node, "model");
169: printf(": model %s", nam);
170:
171: isconsole = node == fbnode;
172:
173: /*
174: * Map the various beasts of this card we are interested in.
175: */
176:
177: sc->sc_bustag = bt;
178: sc->sc_paddr = sbus_bus_addr(bt, sa->sa_slot, sa->sa_offset);
179:
180: sc->sc_physoffset =
181: (off_t)getpropint(node, "i128_fb_physaddr", 0x8000000);
182:
183: if (sbus_bus_map(bt, sa->sa_slot, sa->sa_offset + sc->sc_physoffset,
184: getpropint(node, "i128_fb_size", 0x400000), BUS_SPACE_MAP_LINEAR,
185: 0, &bh) != 0) {
186: printf("\n%s: couldn't map video memory\n", self->dv_xname);
187: return;
188: }
189: sc->sc_i128_fb = bus_space_vaddr(bt, bh);
190: if (sbus_bus_map(bt, sa->sa_slot, sa->sa_offset +
191: getpropint(node, "p9100_reg_physaddr", 0x10a0000), 0x4000,
192: BUS_SPACE_MAP_LINEAR, 0, &bh) != 0) {
193: printf("\n%s: couldn't map control registers\n", self->dv_xname);
194: return;
195: }
196: sc->sc_p9100 = bus_space_vaddr(bt, bh);
197:
198: /*
199: * For some reason the agten does not use the canonical name for
200: * properties, but uses an ffb_ prefix; and the linebytes property is
201: * missing.
202: * The following is a specific version of
203: * fb_setsize(&sc->sc_sunfb, 8, 1152, 900, node, BUS_SBUS);
204: * using the correct property names.
205: */
206: #ifdef notyet
207: sc->sc_sunfb.sf_depth = 32;
208: #else
209: sc->sc_sunfb.sf_depth = getpropint(node, "ffb_depth", 8);
210: #endif
211: sc->sc_sunfb.sf_width = getpropint(node, "ffb_width", 1152);
212: sc->sc_sunfb.sf_height = getpropint(node, "ffb_height", 900);
213: sc->sc_sunfb.sf_linebytes =
214: roundup(sc->sc_sunfb.sf_width, sc->sc_sunfb.sf_depth) *
215: sc->sc_sunfb.sf_depth / 8;
216: sc->sc_sunfb.sf_fbsize =
217: sc->sc_sunfb.sf_height * sc->sc_sunfb.sf_linebytes;
218:
219: printf(", %dx%d, depth %d\n",
220: sc->sc_sunfb.sf_width, sc->sc_sunfb.sf_height,
221: sc->sc_sunfb.sf_depth);
222:
223: sc->sc_sunfb.sf_ro.ri_bits = (void *)sc->sc_i128_fb;
224:
225: sc->sc_sunfb.sf_ro.ri_hw = sc;
226: fbwscons_init(&sc->sc_sunfb, isconsole ? 0 : RI_CLEAR);
227: fbwscons_setcolormap(&sc->sc_sunfb, agten_setcolor);
228:
229: if (isconsole) {
230: fbwscons_console_init(&sc->sc_sunfb, -1);
231: }
232:
233: fbwscons_attach(&sc->sc_sunfb, &agten_accessops, isconsole);
234: }
235:
236: int
237: agten_ioctl(dev, cmd, data, flags, p)
238: void *dev;
239: u_long cmd;
240: caddr_t data;
241: int flags;
242: struct proc *p;
243: {
244: struct agten_softc *sc = dev;
245: struct wsdisplay_cmap *cm;
246: struct wsdisplay_fbinfo *wdf;
247: int error;
248:
249: switch (cmd) {
250: case WSDISPLAYIO_GTYPE:
251: *(u_int *)data = WSDISPLAY_TYPE_SUN24;
252: break;
253: case WSDISPLAYIO_GINFO:
254: wdf = (struct wsdisplay_fbinfo *)data;
255: wdf->height = sc->sc_sunfb.sf_height;
256: wdf->width = sc->sc_sunfb.sf_width;
257: wdf->depth = sc->sc_sunfb.sf_depth;
258: wdf->cmsize = (sc->sc_sunfb.sf_depth == 8) ? 256 : 0;
259: break;
260: case WSDISPLAYIO_LINEBYTES:
261: *(u_int *)data = sc->sc_sunfb.sf_linebytes;
262: break;
263:
264: case WSDISPLAYIO_GETCMAP:
265: if (sc->sc_sunfb.sf_depth == 8) {
266: cm = (struct wsdisplay_cmap *)data;
267: error = agten_getcmap(&sc->sc_cmap, cm);
268: if (error)
269: return (error);
270: }
271: break;
272: case WSDISPLAYIO_PUTCMAP:
273: if (sc->sc_sunfb.sf_depth == 8) {
274: cm = (struct wsdisplay_cmap *)data;
275: error = agten_putcmap(&sc->sc_cmap, cm);
276: if (error)
277: return (error);
278: agten_loadcmap(sc, 0, 256);
279: }
280: break;
281:
282: case WSDISPLAYIO_SVIDEO:
283: case WSDISPLAYIO_GVIDEO:
284: break;
285:
286: case WSDISPLAYIO_GCURPOS:
287: case WSDISPLAYIO_SCURPOS:
288: case WSDISPLAYIO_GCURMAX:
289: case WSDISPLAYIO_GCURSOR:
290: case WSDISPLAYIO_SCURSOR:
291: default:
292: return (-1); /* not supported yet */
293: }
294:
295: return (0);
296: }
297:
298: /*
299: * Return the address that would map the given device at the given
300: * offset, allowing for the given protection, or return -1 for error.
301: */
302: paddr_t
303: agten_mmap(v, offset, prot)
304: void *v;
305: off_t offset;
306: int prot;
307: {
308: struct agten_softc *sc = v;
309:
310: if (offset & PGOFSET)
311: return (-1);
312:
313: /* Allow mapping as a dumb framebuffer from offset 0 */
314: if (offset >= 0 && offset < sc->sc_sunfb.sf_fbsize) {
315: return (bus_space_mmap(sc->sc_bustag, sc->sc_paddr,
316: sc->sc_physoffset + offset, prot, BUS_SPACE_MAP_LINEAR));
317: }
318:
319: return (-1); /* not a user-map offset */
320: }
321:
322: void
323: agten_setcolor(v, index, r, g, b)
324: void *v;
325: u_int index;
326: u_int8_t r, g, b;
327: {
328: struct agten_softc *sc = v;
329:
330: sc->sc_cmap.cm_red[index] = r;
331: sc->sc_cmap.cm_green[index] = g;
332: sc->sc_cmap.cm_blue[index] = b;
333:
334: agten_loadcmap(sc, index, 1);
335: }
336:
337: int
338: agten_alloc_screen(v, type, cookiep, curxp, curyp, attrp)
339: void *v;
340: const struct wsscreen_descr *type;
341: void **cookiep;
342: int *curxp, *curyp;
343: long *attrp;
344: {
345: struct agten_softc *sc = v;
346:
347: if (sc->sc_nscreens > 0)
348: return (ENOMEM);
349:
350: *cookiep = &sc->sc_sunfb.sf_ro;
351: *curyp = 0;
352: *curxp = 0;
353: sc->sc_sunfb.sf_ro.ri_ops.alloc_attr(&sc->sc_sunfb.sf_ro,
354: WSCOL_BLACK, WSCOL_WHITE, WSATTR_WSCOLORS, attrp);
355: sc->sc_nscreens++;
356: return (0);
357: }
358:
359: void
360: agten_free_screen(v, cookie)
361: void *v;
362: void *cookie;
363: {
364: struct agten_softc *sc = v;
365:
366: sc->sc_nscreens--;
367: }
368:
369: int
370: agten_show_screen(v, cookie, waitok, cb, cbarg)
371: void *v;
372: void *cookie;
373: int waitok;
374: void (*cb)(void *, int, int);
375: void *cbarg;
376: {
377: return (0);
378: }
379:
380: int
381: agten_getcmap(struct agten_cmap *cm, struct wsdisplay_cmap *rcm)
382: {
383: u_int index = rcm->index, count = rcm->count;
384: int error;
385:
386: if (index >= 256 || count > 256 - index)
387: return (EINVAL);
388:
389: if ((error = copyout(&cm->cm_red[index], rcm->red, count)) != 0)
390: return (error);
391: if ((error = copyout(&cm->cm_green[index], rcm->green, count)) != 0)
392: return (error);
393: if ((error = copyout(&cm->cm_blue[index], rcm->blue, count)) != 0)
394: return (error);
395:
396: return (0);
397: }
398:
399: int
400: agten_putcmap(struct agten_cmap *cm, struct wsdisplay_cmap *rcm)
401: {
402: u_int index = rcm->index, count = rcm->count;
403: int error;
404:
405: if (index >= 256 || count > 256 - index)
406: return (EINVAL);
407:
408: if ((error = copyin(rcm->red, &cm->cm_red[index], count)) != 0)
409: return (error);
410: if ((error = copyin(rcm->green, &cm->cm_green[index], count)) != 0)
411: return (error);
412: if ((error = copyin(rcm->blue, &cm->cm_blue[index], count)) != 0)
413: return (error);
414:
415: return (0);
416: }
417:
418: static __inline__ void
419: ibm561_write(struct agten_softc *sc, u_int32_t reg, u_int32_t value)
420: {
421: /*
422: * For some design reason the IBM561 PaletteDac needs to be fed
423: * values shifted left by 16 bits. What happened to simplicity?
424: */
425: *(volatile u_int32_t *)(sc->sc_p9100 + P9100_RAMDAC_REGISTER(reg)) =
426: (value) << 16;
427: }
428:
429: void
430: agten_loadcmap(struct agten_softc *sc, u_int start, u_int ncolors)
431: {
432: int i;
433: u_int8_t *red, *green, *blue;
434:
435: ibm561_write(sc, IBM561_ADDR_LOW,
436: (IBM561_CMAP_TABLE + start) & 0xff);
437: ibm561_write(sc, IBM561_ADDR_HIGH,
438: ((IBM561_CMAP_TABLE + start) >> 8) & 0xff);
439:
440: red = sc->sc_cmap.cm_red;
441: green = sc->sc_cmap.cm_green;
442: blue = sc->sc_cmap.cm_blue;
443: for (i = start; i < start + ncolors; i++) {
444: ibm561_write(sc, IBM561_CMD_CMAP, *red++);
445: ibm561_write(sc, IBM561_CMD_CMAP, *green++);
446: ibm561_write(sc, IBM561_CMD_CMAP, *blue++);
447: }
448: }
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