grf_compat.c revision 1.4
1 /* $NetBSD: grf_compat.c,v 1.4 2000/06/26 04:55:46 simonb Exp $ */ 2 3 /* 4 * Copyright (C) 1999 Scott Reynolds 5 * 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 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 /* 31 * macfb compatibility with legacy grf devices 32 */ 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/cdefs.h> 37 #include <sys/conf.h> 38 #include <sys/device.h> 39 #include <sys/errno.h> 40 #include <sys/ioctl.h> 41 #include <sys/malloc.h> 42 #include <sys/mman.h> 43 #include <sys/proc.h> 44 #include <sys/resourcevar.h> 45 #include <sys/vnode.h> 46 47 #include <machine/autoconf.h> 48 #include <machine/bus.h> 49 #include <machine/grfioctl.h> 50 51 #include <mac68k/nubus/nubus.h> 52 #include <mac68k/dev/grfvar.h> 53 #include <mac68k/dev/macfbvar.h> 54 55 #include <miscfs/specfs/specdev.h> 56 57 #include <vm/vm.h> 58 #include <uvm/uvm_extern.h> 59 #include <uvm/uvm_map.h> 60 61 cdev_decl(grf); 62 63 void grf_scinit __P((struct grf_softc *, const char *, int)); 64 void grf_init __P((int)); 65 void grfattach __P((int)); 66 int grfmap __P((dev_t, struct macfb_softc *, caddr_t *, struct proc *)); 67 int grfunmap __P((dev_t, struct macfb_softc *, caddr_t, struct proc *)); 68 69 /* Non-private for the benefit of libkvm. */ 70 struct grf_softc *grf_softc; 71 int numgrf = 0; 72 73 /* 74 * Initialize a softc to sane defaults. 75 */ 76 void 77 grf_scinit(sc, name, unit) 78 struct grf_softc *sc; 79 const char *name; 80 int unit; 81 { 82 memset(sc, 0, sizeof(struct grf_softc)); 83 snprintf(sc->sc_xname, sizeof(sc->sc_xname), "%s%d", name, unit); 84 sc->mfb_sc = NULL; 85 } 86 87 /* 88 * (Re-)initialize the grf_softc block so that at least the requested 89 * number of elements has been allocated. If this results in more 90 * elements than we had prior to getting here, we initialize each of 91 * them to avoid problems down the road. 92 */ 93 void 94 grf_init(n) 95 int n; 96 { 97 struct grf_softc *sc; 98 int i; 99 100 if (n >= numgrf) { 101 i = numgrf; 102 numgrf = n + 1; 103 104 if (grf_softc == NULL) 105 sc = (struct grf_softc *) 106 malloc(numgrf * sizeof(*sc), 107 M_DEVBUF, M_NOWAIT); 108 else 109 sc = (struct grf_softc *) 110 realloc(grf_softc, numgrf * sizeof(*sc), 111 M_DEVBUF, M_NOWAIT); 112 if (sc == NULL) { 113 printf("WARNING: no memory for grf emulation\n"); 114 if (grf_softc != NULL) 115 free(grf_softc, M_DEVBUF); 116 return; 117 } 118 grf_softc = sc; 119 120 /* Initialize per-softc structures. */ 121 while (i < numgrf) { 122 grf_scinit(&grf_softc[i], "grf", i); 123 i++; 124 } 125 } 126 } 127 128 /* 129 * Called by main() during pseudo-device attachment. If we had a 130 * way to configure additional grf devices later, this would actually 131 * allocate enough space for them. As it stands, it's nonsensical, 132 * so other than a basic sanity check we do nothing. 133 */ 134 void 135 grfattach(n) 136 int n; 137 { 138 if (n <= 0) { 139 #ifdef DIAGNOSTIC 140 panic("grfattach: count <= 0"); 141 #endif 142 return; 143 } 144 145 #if 0 /* XXX someday, if we implement a way to attach after autoconfig */ 146 grf_init(n); 147 #endif 148 } 149 150 /* 151 * Called from macfb_attach() after setting up the frame buffer. Since 152 * there is a 1:1 correspondence between the macfb device and the grf 153 * device, the only bit of information we really need is the macfb_softc. 154 */ 155 void 156 grf_attach(sc, unit) 157 struct macfb_softc *sc; 158 int unit; 159 { 160 grf_init(unit); 161 162 if (unit < numgrf) 163 grf_softc[unit].mfb_sc = sc; 164 } 165 166 /* 167 * Standard device ops 168 */ 169 int 170 grfopen(dev, flag, mode, p) 171 dev_t dev; 172 int flag; 173 int mode; 174 struct proc *p; 175 { 176 struct grf_softc *sc; 177 int unit = GRFUNIT(dev); 178 int rv = 0; 179 180 if (grf_softc == NULL || unit >= numgrf) 181 return ENXIO; 182 183 sc = &grf_softc[unit]; 184 if (sc->mfb_sc == NULL) 185 rv = ENXIO; 186 187 return rv; 188 } 189 190 int 191 grfclose(dev, flag, mode, p) 192 dev_t dev; 193 int flag; 194 int mode; 195 struct proc *p; 196 { 197 struct grf_softc *sc; 198 int unit = GRFUNIT(dev); 199 int rv = 0; 200 201 if (grf_softc == NULL || unit >= numgrf) 202 return ENXIO; 203 204 sc = &grf_softc[unit]; 205 if (sc->mfb_sc != NULL) 206 macfb_clear(sc->mfb_sc->sc_dc); /* clear the display */ 207 else 208 rv = ENXIO; 209 210 return rv; 211 } 212 213 int 214 grfread(dev, uio, ioflag) 215 dev_t dev; 216 struct uio *uio; 217 int ioflag; 218 { 219 return ENXIO; 220 } 221 222 int 223 grfwrite(dev, uio, ioflag) 224 dev_t dev; 225 struct uio *uio; 226 int ioflag; 227 { 228 return ENXIO; 229 } 230 231 int 232 grfioctl(dev, cmd, data, flag, p) 233 dev_t dev; 234 u_long cmd; 235 caddr_t data; 236 int flag; 237 struct proc *p; 238 { 239 struct grf_softc *sc; 240 struct macfb_devconfig *dc; 241 #if defined(GRF_COMPAT) || (NGRF > 0) 242 struct grfinfo *gd; 243 #endif /* GRF_COMPAT || (NGRF > 0) */ 244 struct grfmode *gm; 245 int unit = GRFUNIT(dev); 246 int rv; 247 248 if (grf_softc == NULL || unit >= numgrf) 249 return ENXIO; 250 251 sc = &grf_softc[unit]; 252 if (sc->mfb_sc == NULL) 253 return ENXIO; 254 255 dc = sc->mfb_sc->sc_dc; 256 257 switch (cmd) { 258 #if defined(GRF_COMPAT) || (NGRF > 0) 259 case GRFIOCGINFO: 260 gd = (struct grfinfo *)data; 261 memset(gd, 0, sizeof(struct grfinfo)); 262 gd->gd_fbaddr = (caddr_t)dc->dc_paddr; 263 gd->gd_fbsize = dc->dc_size; 264 gd->gd_colors = (short)(1 << dc->dc_depth); 265 gd->gd_planes = (short)dc->dc_depth; 266 gd->gd_fbwidth = dc->dc_wid; 267 gd->gd_fbheight = dc->dc_ht; 268 gd->gd_fbrowbytes = dc->dc_rowbytes; 269 gd->gd_dwidth = dc->dc_raster.width; 270 gd->gd_dheight = dc->dc_raster.height; 271 rv = 0; 272 break; 273 #endif /* GRF_COMPAT || (NGRF > 0) */ 274 275 case GRFIOCON: 276 case GRFIOCOFF: 277 /* Nothing to do */ 278 rv = 0; 279 break; 280 281 #if defined(GRF_COMPAT) || (NGRF > 0) 282 case GRFIOCMAP: 283 rv = grfmap(dev, sc->mfb_sc, (caddr_t *)data, p); 284 break; 285 286 case GRFIOCUNMAP: 287 rv = grfunmap(dev, sc->mfb_sc, *(caddr_t *)data, p); 288 break; 289 #endif /* GRF_COMPAT || (NGRF > 0) */ 290 291 case GRFIOCGMODE: 292 gm = (struct grfmode *)data; 293 memset(gm, 0, sizeof(struct grfmode)); 294 gm->fbbase = (char *)dc->dc_vaddr; 295 gm->fbsize = dc->dc_size; 296 gm->fboff = dc->dc_offset; 297 gm->rowbytes = dc->dc_rowbytes; 298 gm->width = dc->dc_wid; 299 gm->height = dc->dc_ht; 300 gm->psize = dc->dc_depth; 301 rv = 0; 302 break; 303 304 case GRFIOCLISTMODES: 305 case GRFIOCGETMODE: 306 case GRFIOCSETMODE: 307 /* NONE of these operations are (officially) supported. */ 308 default: 309 rv = EINVAL; 310 break; 311 } 312 return rv; 313 } 314 315 int 316 grfpoll(dev, events, p) 317 dev_t dev; 318 int events; 319 struct proc *p; 320 { 321 return EINVAL; 322 } 323 324 paddr_t 325 grfmmap(dev, off, prot) 326 dev_t dev; 327 off_t off; 328 int prot; 329 { 330 struct grf_softc *sc; 331 struct macfb_devconfig *dc; 332 paddr_t addr; 333 int unit = GRFUNIT(dev); 334 335 if (grf_softc == NULL || unit >= numgrf) 336 return ENXIO; 337 338 sc = &grf_softc[unit]; 339 if (sc->mfb_sc == NULL) 340 return ENXIO; 341 342 dc = sc->mfb_sc->sc_dc; 343 344 if (off >= 0 && 345 off < m68k_round_page(dc->dc_offset + dc->dc_size)) 346 addr = m68k_btop(dc->dc_paddr + off); 347 else 348 addr = (-1); /* XXX bogus */ 349 350 return addr; 351 } 352 353 int 354 grfmap(dev, sc, addrp, p) 355 dev_t dev; 356 struct macfb_softc *sc; 357 caddr_t *addrp; 358 struct proc *p; 359 { 360 struct specinfo si; 361 struct vnode vn; 362 u_long len; 363 int error, flags; 364 365 *addrp = (caddr_t)sc->sc_dc->dc_paddr; 366 len = m68k_round_page(sc->sc_dc->dc_offset + sc->sc_dc->dc_size); 367 flags = MAP_SHARED | MAP_FIXED; 368 369 vn.v_type = VCHR; /* XXX */ 370 vn.v_specinfo = &si; /* XXX */ 371 vn.v_rdev = dev; /* XXX */ 372 373 error = uvm_mmap(&p->p_vmspace->vm_map, (vaddr_t *)addrp, 374 (vsize_t)len, VM_PROT_ALL, VM_PROT_ALL, 375 flags, (caddr_t)&vn, 0, p->p_rlimit[RLIMIT_MEMLOCK].rlim_cur); 376 377 /* Offset into page: */ 378 *addrp += sc->sc_dc->dc_offset; 379 380 return (error); 381 } 382 383 int 384 grfunmap(dev, sc, addr, p) 385 dev_t dev; 386 struct macfb_softc *sc; 387 caddr_t addr; 388 struct proc *p; 389 { 390 vm_size_t size; 391 int rv; 392 393 addr -= sc->sc_dc->dc_offset; 394 395 if (addr <= 0) 396 return (-1); 397 398 size = m68k_round_page(sc->sc_dc->dc_offset + sc->sc_dc->dc_size); 399 400 rv = uvm_unmap(&p->p_vmspace->vm_map, (vaddr_t)addr, 401 (vaddr_t)addr + size); 402 403 return (rv == KERN_SUCCESS ? 0 : EINVAL); 404 } 405
Indexes created Thu Oct 02 14:10:14 GMT 2025