grf_compat.c revision 1.7.4.1
1 /* $NetBSD: grf_compat.c,v 1.7.4.1 2001/10/10 11:56:14 fvdl 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 <uvm/uvm_extern.h> 58 #include <uvm/uvm_map.h> 59 60 cdev_decl(grf); 61 62 void grf_scinit __P((struct grf_softc *, const char *, int)); 63 void grf_init __P((int)); 64 void grfattach __P((int)); 65 int grfmap __P((struct vnode *, struct macfb_softc *, caddr_t *, struct proc *)); 66 int grfunmap __P((struct vnode *, struct macfb_softc *, caddr_t, struct proc *)); 67 68 /* Non-private for the benefit of libkvm. */ 69 struct grf_softc *grf_softc; 70 int numgrf = 0; 71 72 /* 73 * Initialize a softc to sane defaults. 74 */ 75 void 76 grf_scinit(sc, name, unit) 77 struct grf_softc *sc; 78 const char *name; 79 int unit; 80 { 81 memset(sc, 0, sizeof(struct grf_softc)); 82 snprintf(sc->sc_xname, sizeof(sc->sc_xname), "%s%d", name, unit); 83 sc->mfb_sc = NULL; 84 } 85 86 /* 87 * (Re-)initialize the grf_softc block so that at least the requested 88 * number of elements has been allocated. If this results in more 89 * elements than we had prior to getting here, we initialize each of 90 * them to avoid problems down the road. 91 */ 92 void 93 grf_init(n) 94 int n; 95 { 96 struct grf_softc *sc; 97 int i; 98 99 if (n >= numgrf) { 100 i = numgrf; 101 numgrf = n + 1; 102 103 if (grf_softc == NULL) 104 sc = (struct grf_softc *) 105 malloc(numgrf * sizeof(*sc), 106 M_DEVBUF, M_NOWAIT); 107 else 108 sc = (struct grf_softc *) 109 realloc(grf_softc, numgrf * sizeof(*sc), 110 M_DEVBUF, M_NOWAIT); 111 if (sc == NULL) { 112 printf("WARNING: no memory for grf emulation\n"); 113 if (grf_softc != NULL) 114 free(grf_softc, M_DEVBUF); 115 return; 116 } 117 grf_softc = sc; 118 119 /* Initialize per-softc structures. */ 120 while (i < numgrf) { 121 grf_scinit(&grf_softc[i], "grf", i); 122 i++; 123 } 124 } 125 } 126 127 /* 128 * Called by main() during pseudo-device attachment. If we had a 129 * way to configure additional grf devices later, this would actually 130 * allocate enough space for them. As it stands, it's nonsensical, 131 * so other than a basic sanity check we do nothing. 132 */ 133 void 134 grfattach(n) 135 int n; 136 { 137 if (n <= 0) { 138 #ifdef DIAGNOSTIC 139 panic("grfattach: count <= 0"); 140 #endif 141 return; 142 } 143 144 #if 0 /* XXX someday, if we implement a way to attach after autoconfig */ 145 grf_init(n); 146 #endif 147 } 148 149 /* 150 * Called from macfb_attach() after setting up the frame buffer. Since 151 * there is a 1:1 correspondence between the macfb device and the grf 152 * device, the only bit of information we really need is the macfb_softc. 153 */ 154 void 155 grf_attach(sc, unit) 156 struct macfb_softc *sc; 157 int unit; 158 { 159 grf_init(unit); 160 161 if (unit < numgrf) 162 grf_softc[unit].mfb_sc = sc; 163 } 164 165 /* 166 * Standard device ops 167 */ 168 int 169 grfopen(devvp, flag, mode, p) 170 struct vnode *devvp; 171 int flag; 172 int mode; 173 struct proc *p; 174 { 175 dev_t dev; 176 struct grf_softc *sc; 177 int rv = 0; 178 int unit; 179 180 dev = vdev_rdev(devvp); 181 unit = GRFUNIT(dev); 182 183 if (grf_softc == NULL || unit >= numgrf) 184 return ENXIO; 185 186 sc = &grf_softc[unit]; 187 if (sc->mfb_sc == NULL) 188 rv = ENXIO; 189 190 vdev_setprivdata(devvp, sc); 191 192 return rv; 193 } 194 195 int 196 grfclose(devvp, flag, mode, p) 197 struct vnode *devvp; 198 int flag; 199 int mode; 200 struct proc *p; 201 { 202 struct grf_softc *sc; 203 int rv = 0; 204 205 if (grf_softc == NULL) 206 return ENXIO; 207 208 sc = vdev_privdata(devvp); 209 210 if (sc->mfb_sc != NULL) 211 macfb_clear(sc->mfb_sc->sc_dc); /* clear the display */ 212 else 213 rv = ENXIO; 214 215 return rv; 216 } 217 218 int 219 grfread(devvp, uio, ioflag) 220 struct vnode *devvp; 221 struct uio *uio; 222 int ioflag; 223 { 224 return ENXIO; 225 } 226 227 int 228 grfwrite(devvp, uio, ioflag) 229 struct vnode *devvp; 230 struct uio *uio; 231 int ioflag; 232 { 233 return ENXIO; 234 } 235 236 int 237 grfioctl(devvp, cmd, data, flag, p) 238 struct vnode *devvp; 239 u_long cmd; 240 caddr_t data; 241 int flag; 242 struct proc *p; 243 { 244 struct grf_softc *sc; 245 struct macfb_devconfig *dc; 246 #if defined(GRF_COMPAT) || (NGRF > 0) 247 struct grfinfo *gd; 248 #endif /* GRF_COMPAT || (NGRF > 0) */ 249 struct grfmode *gm; 250 int rv; 251 252 if (grf_softc == NULL) 253 return ENXIO; 254 255 sc = vdev_privdata(devvp); 256 if (sc->mfb_sc == NULL) 257 return ENXIO; 258 259 dc = sc->mfb_sc->sc_dc; 260 261 switch (cmd) { 262 #if defined(GRF_COMPAT) || (NGRF > 0) 263 case GRFIOCGINFO: 264 gd = (struct grfinfo *)data; 265 memset(gd, 0, sizeof(struct grfinfo)); 266 gd->gd_fbaddr = (caddr_t)dc->dc_paddr; 267 gd->gd_fbsize = dc->dc_size; 268 gd->gd_colors = (short)(1 << dc->dc_depth); 269 gd->gd_planes = (short)dc->dc_depth; 270 gd->gd_fbwidth = dc->dc_wid; 271 gd->gd_fbheight = dc->dc_ht; 272 gd->gd_fbrowbytes = dc->dc_rowbytes; 273 gd->gd_dwidth = dc->dc_raster.width; 274 gd->gd_dheight = dc->dc_raster.height; 275 rv = 0; 276 break; 277 #endif /* GRF_COMPAT || (NGRF > 0) */ 278 279 case GRFIOCON: 280 case GRFIOCOFF: 281 /* Nothing to do */ 282 rv = 0; 283 break; 284 285 #if defined(GRF_COMPAT) || (NGRF > 0) 286 case GRFIOCMAP: 287 rv = grfmap(devvp, sc->mfb_sc, (caddr_t *)data, p); 288 break; 289 290 case GRFIOCUNMAP: 291 rv = grfunmap(devvp, sc->mfb_sc, *(caddr_t *)data, p); 292 break; 293 #endif /* GRF_COMPAT || (NGRF > 0) */ 294 295 case GRFIOCGMODE: 296 gm = (struct grfmode *)data; 297 memset(gm, 0, sizeof(struct grfmode)); 298 gm->fbbase = (char *)dc->dc_vaddr; 299 gm->fbsize = dc->dc_size; 300 gm->fboff = dc->dc_offset; 301 gm->rowbytes = dc->dc_rowbytes; 302 gm->width = dc->dc_wid; 303 gm->height = dc->dc_ht; 304 gm->psize = dc->dc_depth; 305 rv = 0; 306 break; 307 308 case GRFIOCLISTMODES: 309 case GRFIOCGETMODE: 310 case GRFIOCSETMODE: 311 /* NONE of these operations are (officially) supported. */ 312 default: 313 rv = EINVAL; 314 break; 315 } 316 return rv; 317 } 318 319 int 320 grfpoll(devvp, events, p) 321 struct vnode *devvp; 322 int events; 323 struct proc *p; 324 { 325 return EINVAL; 326 } 327 328 paddr_t 329 grfmmap(devvp, off, prot) 330 struct vnode *devvp; 331 off_t off; 332 int prot; 333 { 334 struct grf_softc *sc; 335 struct macfb_devconfig *dc; 336 paddr_t addr; 337 338 if (grf_softc == NULL) 339 return ENXIO; 340 341 sc = vdev_privdata(devvp); 342 if (sc->mfb_sc == NULL) 343 return ENXIO; 344 345 dc = sc->mfb_sc->sc_dc; 346 347 if (off >= 0 && 348 off < m68k_round_page(dc->dc_offset + dc->dc_size)) 349 addr = m68k_btop(dc->dc_paddr + off); 350 else 351 addr = (-1); /* XXX bogus */ 352 353 return addr; 354 } 355 356 int 357 grfmap(devvp, sc, addrp, p) 358 struct vnode *devvp; 359 struct macfb_softc *sc; 360 caddr_t *addrp; 361 struct proc *p; 362 { 363 u_long len; 364 int error, flags; 365 366 *addrp = (caddr_t)sc->sc_dc->dc_paddr; 367 len = m68k_round_page(sc->sc_dc->dc_offset + sc->sc_dc->dc_size); 368 flags = MAP_SHARED | MAP_FIXED; 369 370 error = uvm_mmap(&p->p_vmspace->vm_map, (vaddr_t *)addrp, 371 (vsize_t)len, VM_PROT_ALL, VM_PROT_ALL, 372 flags, devvp, 0, p->p_rlimit[RLIMIT_MEMLOCK].rlim_cur); 373 374 /* Offset into page: */ 375 *addrp += sc->sc_dc->dc_offset; 376 377 return (error); 378 } 379 380 int 381 grfunmap(devvp, sc, addr, p) 382 struct vnode *devvp; 383 struct macfb_softc *sc; 384 caddr_t addr; 385 struct proc *p; 386 { 387 vm_size_t size; 388 389 addr -= sc->sc_dc->dc_offset; 390 391 if (addr <= 0) 392 return (-1); 393 394 size = m68k_round_page(sc->sc_dc->dc_offset + sc->sc_dc->dc_size); 395 uvm_unmap(&p->p_vmspace->vm_map, (vaddr_t)addr, (vaddr_t)addr + size); 396 return 0; 397 } 398
Indexes created Thu Oct 02 14:10:14 GMT 2025