Annotation of sys/arch/sparc/dev/agten.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: agten.c,v 1.10 2006/06/02 20:00:54 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 <sparc/dev/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: struct rom_reg sc_phys; /* physical address and */
96: off_t sc_physoffset; /* offset for frame buffer */
97:
98: volatile u_int8_t *sc_p9100;
99: struct agten_cmap sc_cmap; /* shadow color map */
100:
101: volatile u_int32_t *sc_i128_fb;
102: };
103:
104: int agten_ioctl(void *, u_long, caddr_t, int, struct proc *);
105: paddr_t agten_mmap(void *, off_t, int);
106: void agten_reset(struct agten_softc *);
107: void agten_setcolor(void *, u_int, u_int8_t, u_int8_t, u_int8_t);
108:
109: static __inline__
110: void ibm561_write(struct agten_softc *, u_int32_t, u_int32_t);
111: int agten_getcmap(struct agten_cmap *, struct wsdisplay_cmap *);
112: int agten_putcmap(struct agten_cmap *, struct wsdisplay_cmap *);
113: void agten_loadcmap(struct agten_softc *, u_int, u_int);
114:
115: struct wsdisplay_accessops agten_accessops = {
116: agten_ioctl,
117: agten_mmap,
118: NULL, /* alloc_screen */
119: NULL, /* free_screen */
120: NULL, /* show_screen */
121: NULL, /* load_font */
122: NULL, /* scrollback */
123: NULL, /* getchar */
124: NULL, /* burner */
125: NULL /* pollc */
126: };
127:
128: int agtenmatch(struct device *, void *, void *);
129: void agtenattach(struct device *, struct device *, void *);
130:
131: struct cfattach agten_ca = {
132: sizeof(struct agten_softc), agtenmatch, agtenattach
133: };
134:
135: struct cfdriver agten_cd = {
136: NULL, "agten", DV_DULL
137: };
138:
139: int
140: agtenmatch(struct device *parent, void *vcf, void *aux)
141: {
142: struct confargs *ca = aux;
143: struct romaux *ra = &ca->ca_ra;
144:
145: if (strcmp(ra->ra_name, "PFU,aga") != 0)
146: return (0);
147:
148: return (1);
149: }
150:
151: void
152: agtenattach(struct device *parent, struct device *self, void *args)
153: {
154: struct agten_softc *sc = (struct agten_softc *)self;
155: struct confargs *ca = args;
156: int node, isconsole;
157: char *nam;
158:
159: node = ca->ca_ra.ra_node;
160: nam = getpropstring(node, "model");
161: printf(": model %s", nam);
162:
163: isconsole = node == fbnode;
164:
165: sc->sc_phys = ca->ca_ra.ra_reg[0];
166:
167: /*
168: * Map the various beasts of this card we are interested in.
169: */
170:
171: sc->sc_physoffset =
172: (off_t)getpropint(node, "i128_fb_physaddr", 0x8000000);
173: sc->sc_i128_fb = mapiodev(ca->ca_ra.ra_reg, sc->sc_physoffset,
174: getpropint(node, "i128_fb_size", 0x400000));
175: sc->sc_p9100 = mapiodev(ca->ca_ra.ra_reg,
176: getpropint(node, "p9100_reg_physaddr", 0x10a0000),
177: 0x4000);
178:
179: /*
180: * For some reason the agten does not use the canonical name for
181: * properties, but uses an ffb_ prefix; and the linebytes property is
182: * missing.
183: * The following is a specific version of
184: * fb_setsize(&sc->sc_sunfb, 8, 1152, 900, node, BUS_SBUS);
185: * using the correct property names.
186: */
187: #ifdef notyet
188: sc->sc_sunfb.sf_depth = 32;
189: #else
190: sc->sc_sunfb.sf_depth = getpropint(node, "ffb_depth", 8);
191: #endif
192: sc->sc_sunfb.sf_width = getpropint(node, "ffb_width", 1152);
193: sc->sc_sunfb.sf_height = getpropint(node, "ffb_height", 900);
194: sc->sc_sunfb.sf_linebytes =
195: roundup(sc->sc_sunfb.sf_width, sc->sc_sunfb.sf_depth) *
196: sc->sc_sunfb.sf_depth / 8;
197: sc->sc_sunfb.sf_fbsize =
198: sc->sc_sunfb.sf_height * sc->sc_sunfb.sf_linebytes;
199:
200: printf(", %dx%d, depth %d\n",
201: sc->sc_sunfb.sf_width, sc->sc_sunfb.sf_height,
202: sc->sc_sunfb.sf_depth);
203:
204: sc->sc_sunfb.sf_ro.ri_bits = (void *)sc->sc_i128_fb;
205:
206: sc->sc_sunfb.sf_ro.ri_hw = sc;
207: fbwscons_init(&sc->sc_sunfb, isconsole ? 0 : RI_CLEAR);
208: fbwscons_setcolormap(&sc->sc_sunfb, agten_setcolor);
209:
210: if (isconsole) {
211: fbwscons_console_init(&sc->sc_sunfb, -1);
212: }
213:
214: fbwscons_attach(&sc->sc_sunfb, &agten_accessops, isconsole);
215: }
216:
217: int
218: agten_ioctl(void *dev, u_long cmd, caddr_t data, int flags, struct proc *p)
219: {
220: struct agten_softc *sc = dev;
221: struct wsdisplay_cmap *cm;
222: struct wsdisplay_fbinfo *wdf;
223: int error;
224:
225: switch (cmd) {
226: case WSDISPLAYIO_GTYPE:
227: *(u_int *)data = WSDISPLAY_TYPE_SUN24;
228: break;
229: case WSDISPLAYIO_GINFO:
230: wdf = (struct wsdisplay_fbinfo *)data;
231: wdf->height = sc->sc_sunfb.sf_height;
232: wdf->width = sc->sc_sunfb.sf_width;
233: wdf->depth = sc->sc_sunfb.sf_depth;
234: wdf->cmsize = (sc->sc_sunfb.sf_depth == 8) ? 256 : 0;
235: break;
236: case WSDISPLAYIO_LINEBYTES:
237: *(u_int *)data = sc->sc_sunfb.sf_linebytes;
238: break;
239:
240: case WSDISPLAYIO_GETCMAP:
241: if (sc->sc_sunfb.sf_depth == 8) {
242: cm = (struct wsdisplay_cmap *)data;
243: error = agten_getcmap(&sc->sc_cmap, cm);
244: if (error)
245: return (error);
246: }
247: break;
248: case WSDISPLAYIO_PUTCMAP:
249: if (sc->sc_sunfb.sf_depth == 8) {
250: cm = (struct wsdisplay_cmap *)data;
251: error = agten_putcmap(&sc->sc_cmap, cm);
252: if (error)
253: return (error);
254: agten_loadcmap(sc, 0, 256);
255: }
256: break;
257:
258: case WSDISPLAYIO_SVIDEO:
259: case WSDISPLAYIO_GVIDEO:
260: break;
261:
262: case WSDISPLAYIO_GCURPOS:
263: case WSDISPLAYIO_SCURPOS:
264: case WSDISPLAYIO_GCURMAX:
265: case WSDISPLAYIO_GCURSOR:
266: case WSDISPLAYIO_SCURSOR:
267: default:
268: return (-1); /* not supported yet */
269: }
270:
271: return (0);
272: }
273:
274: paddr_t
275: agten_mmap(void *v, off_t offset, int prot)
276: {
277: struct agten_softc *sc = v;
278:
279: if (offset & PGOFSET)
280: return (-1);
281:
282: /* Allow mapping as a dumb framebuffer from offset 0 */
283: if (offset >= 0 && offset < sc->sc_sunfb.sf_fbsize) {
284: return (REG2PHYS(&sc->sc_phys, sc->sc_physoffset + offset) |
285: PMAP_NC);
286: }
287:
288: return (-1);
289: }
290:
291: void
292: agten_setcolor(void *v, u_int index, u_int8_t r, u_int8_t g, u_int8_t b)
293: {
294: struct agten_softc *sc = v;
295:
296: sc->sc_cmap.cm_red[index] = r;
297: sc->sc_cmap.cm_green[index] = g;
298: sc->sc_cmap.cm_blue[index] = b;
299:
300: agten_loadcmap(sc, index, 1);
301: }
302:
303: int
304: agten_getcmap(struct agten_cmap *cm, struct wsdisplay_cmap *rcm)
305: {
306: u_int index = rcm->index, count = rcm->count;
307: int error;
308:
309: if (index >= 256 || count > 256 - index)
310: return (EINVAL);
311:
312: if ((error = copyout(&cm->cm_red[index], rcm->red, count)) != 0)
313: return (error);
314: if ((error = copyout(&cm->cm_green[index], rcm->green, count)) != 0)
315: return (error);
316: if ((error = copyout(&cm->cm_blue[index], rcm->blue, count)) != 0)
317: return (error);
318:
319: return (0);
320: }
321:
322: int
323: agten_putcmap(struct agten_cmap *cm, struct wsdisplay_cmap *rcm)
324: {
325: u_int index = rcm->index, count = rcm->count;
326: int error;
327:
328: if (index >= 256 || count > 256 - index)
329: return (EINVAL);
330:
331: if ((error = copyin(rcm->red, &cm->cm_red[index], count)) != 0)
332: return (error);
333: if ((error = copyin(rcm->green, &cm->cm_green[index], count)) != 0)
334: return (error);
335: if ((error = copyin(rcm->blue, &cm->cm_blue[index], count)) != 0)
336: return (error);
337:
338: return (0);
339: }
340:
341: static __inline__ void
342: ibm561_write(struct agten_softc *sc, u_int32_t reg, u_int32_t value)
343: {
344: /*
345: * For some design reason the IBM561 PaletteDac needs to be fed
346: * values shifted left by 16 bits. What happened to simplicity?
347: */
348: *(volatile u_int32_t *)(sc->sc_p9100 + P9100_RAMDAC_REGISTER(reg)) =
349: (value) << 16;
350: }
351:
352: void
353: agten_loadcmap(struct agten_softc *sc, u_int start, u_int ncolors)
354: {
355: int i;
356: u_int8_t *red, *green, *blue;
357:
358: ibm561_write(sc, IBM561_ADDR_LOW,
359: (IBM561_CMAP_TABLE + start) & 0xff);
360: ibm561_write(sc, IBM561_ADDR_HIGH,
361: ((IBM561_CMAP_TABLE + start) >> 8) & 0xff);
362:
363: red = sc->sc_cmap.cm_red;
364: green = sc->sc_cmap.cm_green;
365: blue = sc->sc_cmap.cm_blue;
366: for (i = start; i < start + ncolors; i++) {
367: ibm561_write(sc, IBM561_CMD_CMAP, *red++);
368: ibm561_write(sc, IBM561_CMD_CMAP, *green++);
369: ibm561_write(sc, IBM561_CMD_CMAP, *blue++);
370: }
371: }
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