Annotation of sys/arch/sparc/dev/mgx.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: mgx.c,v 1.12 2007/02/18 18:38:54 miod Exp $ */
! 2: /*
! 3: * Copyright (c) 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: * Driver for the Southland Media Systems (now Quantum 3D) MGX and MGXPlus
! 31: * frame buffers.
! 32: *
! 33: * Pretty crude, due to the lack of documentation. Works as a dumb frame
! 34: * buffer in 8 bit mode, although the hardware can run in an 32 bit
! 35: * accelerated mode. Also, interrupts are not handled.
! 36: */
! 37:
! 38: #include <sys/param.h>
! 39: #include <sys/systm.h>
! 40: #include <sys/buf.h>
! 41: #include <sys/device.h>
! 42: #include <sys/ioctl.h>
! 43: #include <sys/malloc.h>
! 44: #include <sys/mman.h>
! 45: #include <sys/tty.h>
! 46: #include <sys/conf.h>
! 47:
! 48: #include <uvm/uvm_extern.h>
! 49:
! 50: #include <machine/autoconf.h>
! 51: #include <machine/pmap.h>
! 52: #include <machine/cpu.h>
! 53: #include <machine/conf.h>
! 54:
! 55: #include <dev/wscons/wsconsio.h>
! 56: #include <dev/wscons/wsdisplayvar.h>
! 57: #include <dev/rasops/rasops.h>
! 58: #include <machine/fbvar.h>
! 59:
! 60: #include <sparc/dev/sbusvar.h>
! 61:
! 62: /*
! 63: * MGX PROM register layout
! 64: */
! 65:
! 66: #define MGX_NREG 9
! 67: #define MGX_REG_CRTC 4 /* video control and ramdac */
! 68: #define MGX_REG_CTRL 5 /* control engine */
! 69: #define MGX_REG_VRAM8 8 /* 8-bit memory space */
! 70:
! 71: /*
! 72: * MGX CRTC empirical constants
! 73: */
! 74: #if _BYTE_ORDER == _LITTLE_ENDIAN
! 75: #define IO_ADDRESS(x) (x)
! 76: #else
! 77: #define IO_ADDRESS(x) ((x) ^ 0x03)
! 78: #endif
! 79: #define CRTC_INDEX IO_ADDRESS(0x03c4)
! 80: #define CRTC_DATA IO_ADDRESS(0x03c5)
! 81: #define CD_DISABLEVIDEO 0x0020
! 82: #define CMAP_READ_INDEX IO_ADDRESS(0x03c7)
! 83: #define CMAP_WRITE_INDEX IO_ADDRESS(0x03c8)
! 84: #define CMAP_DATA IO_ADDRESS(0x03c9)
! 85:
! 86: /* per-display variables */
! 87: struct mgx_softc {
! 88: struct sunfb sc_sunfb; /* common base device */
! 89: struct rom_reg sc_phys;
! 90: u_int8_t sc_cmap[256 * 3]; /* shadow colormap */
! 91: volatile u_int8_t *sc_vidc; /* ramdac registers */
! 92: };
! 93:
! 94: void mgx_burner(void *, u_int ,u_int);
! 95: int mgx_getcmap(u_int8_t *, struct wsdisplay_cmap *);
! 96: int mgx_ioctl(void *, u_long, caddr_t, int, struct proc *);
! 97: void mgx_loadcmap(struct mgx_softc *, int, int);
! 98: paddr_t mgx_mmap(void *, off_t, int);
! 99: int mgx_putcmap(u_int8_t *, struct wsdisplay_cmap *);
! 100: void mgx_setcolor(void *, u_int, u_int8_t, u_int8_t, u_int8_t);
! 101:
! 102: struct wsdisplay_accessops mgx_accessops = {
! 103: mgx_ioctl,
! 104: mgx_mmap,
! 105: NULL, /* alloc_screen */
! 106: NULL, /* free_screen */
! 107: NULL, /* show_screen */
! 108: NULL, /* load_font */
! 109: NULL, /* scrollback */
! 110: NULL, /* getchar */
! 111: mgx_burner,
! 112: NULL /* pollc */
! 113: };
! 114:
! 115: int mgxmatch(struct device *, void *, void *);
! 116: void mgxattach(struct device *, struct device *, void *);
! 117:
! 118: struct cfattach mgx_ca = {
! 119: sizeof(struct mgx_softc), mgxmatch, mgxattach
! 120: };
! 121:
! 122: struct cfdriver mgx_cd = {
! 123: NULL, "mgx", DV_DULL
! 124: };
! 125:
! 126: /*
! 127: * Match an MGX or MGX+ card.
! 128: */
! 129: int
! 130: mgxmatch(struct device *parent, void *vcf, void *aux)
! 131: {
! 132: struct confargs *ca = aux;
! 133: struct romaux *ra = &ca->ca_ra;
! 134:
! 135: if (strcmp(ra->ra_name, "SMSI,mgx") != 0 &&
! 136: strcmp(ra->ra_name, "mgx") != 0)
! 137: return (0);
! 138:
! 139: return (1);
! 140: }
! 141:
! 142: /*
! 143: * Attach an MGX frame buffer.
! 144: * This will keep the frame buffer in the actual PROM mode, and attach
! 145: * a wsdisplay child device to itself.
! 146: */
! 147: void
! 148: mgxattach(struct device *parent, struct device *self, void *args)
! 149: {
! 150: struct mgx_softc *sc = (struct mgx_softc *)self;
! 151: struct confargs *ca = args;
! 152: int node, fbsize;
! 153: int isconsole;
! 154:
! 155: node = ca->ca_ra.ra_node;
! 156:
! 157: printf(": %s", getpropstring(node, "model"));
! 158:
! 159: isconsole = node == fbnode;
! 160:
! 161: /* Check registers */
! 162: if (ca->ca_ra.ra_nreg < MGX_NREG) {
! 163: printf("\n%s: expected %d registers, got %d\n",
! 164: self->dv_xname, MGX_NREG, ca->ca_ra.ra_nreg);
! 165: return;
! 166: }
! 167:
! 168: sc->sc_vidc = (volatile u_int8_t *)mapiodev(
! 169: &ca->ca_ra.ra_reg[MGX_REG_CRTC], 0, PAGE_SIZE);
! 170:
! 171: /* enable video */
! 172: mgx_burner(sc, 1, 0);
! 173:
! 174: fb_setsize(&sc->sc_sunfb, 8, 1152, 900, node, ca->ca_bustype);
! 175:
! 176: /* Sanity check frame buffer memory */
! 177: fbsize = getpropint(node, "fb_size", 0);
! 178: if (fbsize != 0 && sc->sc_sunfb.sf_fbsize > fbsize) {
! 179: printf("\n%s: expected at least %d bytes of vram, but card "
! 180: "only provides %d\n",
! 181: self->dv_xname, sc->sc_sunfb.sf_fbsize, fbsize);
! 182: return;
! 183: }
! 184:
! 185: /* Map the frame buffer memory area we're interested in */
! 186: sc->sc_phys = ca->ca_ra.ra_reg[MGX_REG_VRAM8];
! 187: sc->sc_sunfb.sf_ro.ri_bits = mapiodev(&sc->sc_phys,
! 188: 0, round_page(sc->sc_sunfb.sf_fbsize));
! 189: sc->sc_sunfb.sf_ro.ri_hw = sc;
! 190:
! 191: fbwscons_init(&sc->sc_sunfb, isconsole ? 0 : RI_CLEAR);
! 192:
! 193: bzero(sc->sc_cmap, sizeof(sc->sc_cmap));
! 194: fbwscons_setcolormap(&sc->sc_sunfb, mgx_setcolor);
! 195:
! 196: printf(", %dx%d\n",
! 197: sc->sc_sunfb.sf_width, sc->sc_sunfb.sf_height);
! 198:
! 199: if (isconsole) {
! 200: fbwscons_console_init(&sc->sc_sunfb, -1);
! 201: }
! 202:
! 203: fbwscons_attach(&sc->sc_sunfb, &mgx_accessops, isconsole);
! 204: }
! 205:
! 206: /*
! 207: * wsdisplay operations
! 208: */
! 209:
! 210: int
! 211: mgx_ioctl(void *dev, u_long cmd, caddr_t data, int flags, struct proc *p)
! 212: {
! 213: struct mgx_softc *sc = dev;
! 214: struct wsdisplay_cmap *cm;
! 215: struct wsdisplay_fbinfo *wdf;
! 216: int error;
! 217:
! 218: switch (cmd) {
! 219: case WSDISPLAYIO_GTYPE:
! 220: *(u_int *)data = WSDISPLAY_TYPE_MGX;
! 221: break;
! 222: case WSDISPLAYIO_GINFO:
! 223: wdf = (struct wsdisplay_fbinfo *)data;
! 224: wdf->height = sc->sc_sunfb.sf_height;
! 225: wdf->width = sc->sc_sunfb.sf_width;
! 226: wdf->depth = sc->sc_sunfb.sf_depth;
! 227: wdf->cmsize = 256;
! 228: break;
! 229: case WSDISPLAYIO_LINEBYTES:
! 230: *(u_int *)data = sc->sc_sunfb.sf_linebytes;
! 231: break;
! 232:
! 233: case WSDISPLAYIO_GETCMAP:
! 234: cm = (struct wsdisplay_cmap *)data;
! 235: error = mgx_getcmap(sc->sc_cmap, cm);
! 236: if (error != 0)
! 237: return (error);
! 238: break;
! 239: case WSDISPLAYIO_PUTCMAP:
! 240: cm = (struct wsdisplay_cmap *)data;
! 241: error = mgx_putcmap(sc->sc_cmap, cm);
! 242: if (error != 0)
! 243: return (error);
! 244: mgx_loadcmap(sc, cm->index, cm->count);
! 245: break;
! 246:
! 247: case WSDISPLAYIO_SVIDEO:
! 248: case WSDISPLAYIO_GVIDEO:
! 249: break;
! 250:
! 251: default:
! 252: return (-1);
! 253: }
! 254:
! 255: return (0);
! 256: }
! 257:
! 258: paddr_t
! 259: mgx_mmap(void *v, off_t offset, int prot)
! 260: {
! 261: struct mgx_softc *sc = v;
! 262:
! 263: if (offset & PGOFSET)
! 264: return (-1);
! 265:
! 266: /* Allow mapping as a dumb framebuffer from offset 0 */
! 267: if (offset >= 0 && offset < sc->sc_sunfb.sf_fbsize) {
! 268: return (REG2PHYS(&sc->sc_phys, offset) | PMAP_NC);
! 269: }
! 270:
! 271: return (-1);
! 272: }
! 273:
! 274: void
! 275: mgx_burner(void *v, u_int on, u_int flags)
! 276: {
! 277: struct mgx_softc *sc = v;
! 278:
! 279: sc->sc_vidc[CRTC_INDEX] = 1; /* TS mode register */
! 280: if (on)
! 281: sc->sc_vidc[CRTC_DATA] &= ~CD_DISABLEVIDEO;
! 282: else
! 283: sc->sc_vidc[CRTC_DATA] |= CD_DISABLEVIDEO;
! 284: }
! 285:
! 286: /*
! 287: * Colormap handling routines
! 288: */
! 289:
! 290: void
! 291: mgx_setcolor(void *v, u_int index, u_int8_t r, u_int8_t g, u_int8_t b)
! 292: {
! 293: struct mgx_softc *sc = v;
! 294:
! 295: index *= 3;
! 296: sc->sc_cmap[index++] = r;
! 297: sc->sc_cmap[index++] = g;
! 298: sc->sc_cmap[index] = b;
! 299:
! 300: mgx_loadcmap(sc, index, 1);
! 301: }
! 302:
! 303: void
! 304: mgx_loadcmap(struct mgx_softc *sc, int start, int ncolors)
! 305: {
! 306: u_int8_t *color;
! 307: int i;
! 308:
! 309: #if 0
! 310: sc->sc_vidc[CMAP_WRITE_INDEX] = start;
! 311: color = sc->sc_cmap + start * 3;
! 312: #else
! 313: /*
! 314: * Apparently there is no way to load an incomplete cmap to this
! 315: * DAC. What a waste.
! 316: */
! 317: ncolors = 256;
! 318: color = sc->sc_cmap;
! 319: #endif
! 320: for (i = ncolors * 3; i != 0; i--)
! 321: sc->sc_vidc[CMAP_DATA] = *color++;
! 322: }
! 323:
! 324: int
! 325: mgx_getcmap(u_int8_t *cm, struct wsdisplay_cmap *rcm)
! 326: {
! 327: u_int index = rcm->index, count = rcm->count, i;
! 328: int error;
! 329:
! 330: if (index >= 256 || count > 256 - index)
! 331: return (EINVAL);
! 332:
! 333: for (i = 0; i < count; i++) {
! 334: if ((error =
! 335: copyout(cm + (index + i) * 3 + 0, &rcm->red[i], 1)) != 0)
! 336: return (error);
! 337: if ((error =
! 338: copyout(cm + (index + i) * 3 + 1, &rcm->green[i], 1)) != 0)
! 339: return (error);
! 340: if ((error =
! 341: copyout(cm + (index + i) * 3 + 2, &rcm->blue[i], 1)) != 0)
! 342: return (error);
! 343: }
! 344:
! 345: return (0);
! 346: }
! 347:
! 348: int
! 349: mgx_putcmap(u_int8_t *cm, struct wsdisplay_cmap *rcm)
! 350: {
! 351: u_int index = rcm->index, count = rcm->count, i;
! 352: int error;
! 353:
! 354: if (index >= 256 || count > 256 - index)
! 355: return (EINVAL);
! 356:
! 357: for (i = 0; i < count; i++) {
! 358: if ((error =
! 359: copyin(&rcm->red[i], cm + (index + i) * 3 + 0, 1)) != 0)
! 360: return (error);
! 361: if ((error =
! 362: copyin(&rcm->green[i], cm + (index + i) * 3 + 1, 1)) != 0)
! 363: return (error);
! 364: if ((error =
! 365: copyin(&rcm->blue[i], cm + (index + i) * 3 + 2, 1)) != 0)
! 366: return (error);
! 367: }
! 368:
! 369: return (0);
! 370: }
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