grf_compat.c revision 1.2
1 /* $NetBSD: grf_compat.c,v 1.2 2000/02/14 07:01:46 scottr 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 struct grfinfo *gd; 242 struct grfmode *gm; 243 int unit = GRFUNIT(dev); 244 int rv; 245 246 if (grf_softc == NULL || unit >= numgrf) 247 return ENXIO; 248 249 sc = &grf_softc[unit]; 250 if (sc->mfb_sc == NULL) 251 return ENXIO; 252 253 dc = sc->mfb_sc->sc_dc; 254 255 switch (cmd) { 256 case GRFIOCGINFO: 257 gd = (struct grfinfo *)data; 258 memset(gd, 0, sizeof(struct grfinfo)); 259 gd->gd_fbaddr = (caddr_t)dc->dc_paddr; 260 gd->gd_fbsize = dc->dc_size; 261 gd->gd_colors = (short)(1 << dc->dc_depth); 262 gd->gd_planes = (short)dc->dc_depth; 263 gd->gd_fbwidth = dc->dc_wid; 264 gd->gd_fbheight = dc->dc_ht; 265 gd->gd_fbrowbytes = dc->dc_rowbytes; 266 gd->gd_dwidth = dc->dc_raster.width; 267 gd->gd_dheight = dc->dc_raster.height; 268 rv = 0; 269 break; 270 271 case GRFIOCON: 272 case GRFIOCOFF: 273 /* Nothing to do */ 274 rv = 0; 275 break; 276 277 case GRFIOCMAP: 278 rv = grfmap(dev, sc->mfb_sc, (caddr_t *)data, p); 279 break; 280 281 case GRFIOCUNMAP: 282 rv = grfunmap(dev, sc->mfb_sc, *(caddr_t *)data, p); 283 break; 284 285 case GRFIOCGMODE: 286 gm = (struct grfmode *)data; 287 memset(gm, 0, sizeof(struct grfmode)); 288 gm->fbbase = (char *)dc->dc_vaddr; 289 gm->fbsize = dc->dc_size; 290 gm->fboff = dc->dc_offset; 291 gm->rowbytes = dc->dc_rowbytes; 292 gm->width = dc->dc_wid; 293 gm->height = dc->dc_ht; 294 gm->psize = dc->dc_depth; 295 rv = 0; 296 break; 297 298 case GRFIOCLISTMODES: 299 case GRFIOCGETMODE: 300 case GRFIOCSETMODE: 301 /* NONE of these operations are (officially) supported. */ 302 default: 303 rv = EINVAL; 304 break; 305 } 306 return rv; 307 } 308 309 int 310 grfpoll(dev, events, p) 311 dev_t dev; 312 int events; 313 struct proc *p; 314 { 315 return EINVAL; 316 } 317 318 int 319 grfmmap(dev, off, prot) 320 dev_t dev; 321 int off; 322 int prot; 323 { 324 struct grf_softc *sc; 325 struct macfb_devconfig *dc; 326 u_long addr; 327 int unit = GRFUNIT(dev); 328 329 if (grf_softc == NULL || unit >= numgrf) 330 return ENXIO; 331 332 sc = &grf_softc[unit]; 333 if (sc->mfb_sc == NULL) 334 return ENXIO; 335 336 dc = sc->mfb_sc->sc_dc; 337 338 if (off >= 0 && 339 off < m68k_round_page(dc->dc_offset + dc->dc_size)) 340 addr = m68k_btop(dc->dc_paddr + off); 341 else 342 addr = (-1); /* XXX bogus */ 343 344 return (int)addr; 345 } 346 347 int 348 grfmap(dev, sc, addrp, p) 349 dev_t dev; 350 struct macfb_softc *sc; 351 caddr_t *addrp; 352 struct proc *p; 353 { 354 struct specinfo si; 355 struct vnode vn; 356 u_long len; 357 int error, flags; 358 359 *addrp = (caddr_t)sc->sc_dc->dc_paddr; 360 len = m68k_round_page(sc->sc_dc->dc_offset + sc->sc_dc->dc_size); 361 flags = MAP_SHARED | MAP_FIXED; 362 363 vn.v_type = VCHR; /* XXX */ 364 vn.v_specinfo = &si; /* XXX */ 365 vn.v_rdev = dev; /* XXX */ 366 367 error = uvm_mmap(&p->p_vmspace->vm_map, (vaddr_t *)addrp, 368 (vsize_t)len, VM_PROT_ALL, VM_PROT_ALL, 369 flags, (caddr_t)&vn, 0, p->p_rlimit[RLIMIT_MEMLOCK].rlim_cur); 370 371 /* Offset into page: */ 372 *addrp += sc->sc_dc->dc_offset; 373 374 return (error); 375 } 376 377 int 378 grfunmap(dev, sc, addr, p) 379 dev_t dev; 380 struct macfb_softc *sc; 381 caddr_t addr; 382 struct proc *p; 383 { 384 vm_size_t size; 385 int rv; 386 387 addr -= sc->sc_dc->dc_offset; 388 389 if (addr <= 0) 390 return (-1); 391 392 size = m68k_round_page(sc->sc_dc->dc_offset + sc->sc_dc->dc_size); 393 394 rv = uvm_unmap(&p->p_vmspace->vm_map, (vaddr_t)addr, 395 (vaddr_t)addr + size); 396 397 return (rv == KERN_SUCCESS ? 0 : EINVAL); 398 } 399
Indexes created Thu Oct 02 14:10:14 GMT 2025