Annotation of sys/dev/sbus/agten.c, Revision 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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