grf_compat.c revision 1.26.2.1
1 /* $NetBSD: grf_compat.c,v 1.26.2.1 2014/12/31 06:44:00 snj 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 "opt_grf_compat.h" 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: grf_compat.c,v 1.26.2.1 2014/12/31 06:44:00 snj Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/conf.h> 42 #include <sys/device.h> 43 #include <sys/errno.h> 44 #include <sys/ioctl.h> 45 #include <sys/malloc.h> 46 #include <sys/proc.h> 47 #include <sys/resourcevar.h> 48 49 #include <machine/bus.h> 50 #include <machine/grfioctl.h> 51 52 #include <mac68k/nubus/nubus.h> 53 #include <mac68k/dev/grfvar.h> 54 #include <mac68k/dev/macfbvar.h> 55 56 #include <miscfs/specfs/specdev.h> 57 58 #include <uvm/uvm_extern.h> 59 60 dev_type_open(grfopen); 61 dev_type_close(grfclose); 62 dev_type_ioctl(grfioctl); 63 dev_type_mmap(grfmmap); 64 65 const struct cdevsw grf_cdevsw = { 66 .d_open = grfopen, 67 .d_close = grfclose, 68 .d_read = noread, 69 .d_write = nowrite, 70 .d_ioctl = grfioctl, 71 .d_stop = nostop, 72 .d_tty = notty, 73 .d_poll = nopoll, 74 .d_mmap = grfmmap, 75 .d_kqfilter = nokqfilter, 76 .d_discard = nodiscard, 77 .d_flag = 0 78 }; 79 80 void grf_scinit(struct grf_softc *, const char *, int); 81 void grf_init(int); 82 void grfattach(int); 83 int grfmap(dev_t, struct macfb_softc *, void **, struct proc *); 84 int grfunmap(dev_t, struct macfb_softc *, void *, struct proc *); 85 86 /* Non-private for the benefit of libkvm. */ 87 struct grf_softc *grf_softc; 88 int numgrf = 0; 89 90 /* 91 * Initialize a softc to sane defaults. 92 */ 93 void 94 grf_scinit(struct grf_softc *sc, const char *name, int unit) 95 { 96 memset(sc, 0, sizeof(struct grf_softc)); 97 snprintf(sc->sc_xname, sizeof(sc->sc_xname), "%s%d", name, unit); 98 sc->mfb_sc = NULL; 99 } 100 101 /* 102 * (Re-)initialize the grf_softc block so that at least the requested 103 * number of elements has been allocated. If this results in more 104 * elements than we had prior to getting here, we initialize each of 105 * them to avoid problems down the road. 106 */ 107 void 108 grf_init(int n) 109 { 110 struct grf_softc *sc; 111 int i; 112 113 if (n >= numgrf) { 114 i = numgrf; 115 numgrf = n + 1; 116 117 if (grf_softc == NULL) 118 sc = (struct grf_softc *) 119 malloc(numgrf * sizeof(*sc), 120 M_DEVBUF, M_NOWAIT); 121 else 122 sc = (struct grf_softc *) 123 realloc(grf_softc, numgrf * sizeof(*sc), 124 M_DEVBUF, M_NOWAIT); 125 if (sc == NULL) { 126 printf("WARNING: no memory for grf emulation\n"); 127 if (grf_softc != NULL) 128 free(grf_softc, M_DEVBUF); 129 return; 130 } 131 grf_softc = sc; 132 133 /* Initialize per-softc structures. */ 134 while (i < numgrf) { 135 grf_scinit(&grf_softc[i], "grf", i); 136 i++; 137 } 138 } 139 } 140 141 /* 142 * Called by main() during pseudo-device attachment. If we had a 143 * way to configure additional grf devices later, this would actually 144 * allocate enough space for them. As it stands, it's nonsensical, 145 * so other than a basic sanity check we do nothing. 146 */ 147 void 148 grfattach(int n) 149 { 150 if (n <= 0) { 151 #ifdef DIAGNOSTIC 152 panic("grfattach: count <= 0"); 153 #endif 154 return; 155 } 156 157 #if 0 /* XXX someday, if we implement a way to attach after autoconfig */ 158 grf_init(n); 159 #endif 160 } 161 162 /* 163 * Called from macfb_attach() after setting up the frame buffer. Since 164 * there is a 1:1 correspondence between the macfb device and the grf 165 * device, the only bit of information we really need is the macfb_softc. 166 */ 167 void 168 grf_attach(struct macfb_softc *sc, int unit) 169 { 170 171 grf_init(unit); 172 if (unit < numgrf) 173 grf_softc[unit].mfb_sc = sc; 174 } 175 176 /* 177 * Standard device ops 178 */ 179 int 180 grfopen(dev_t dev, int flag, int mode, struct lwp *l) 181 { 182 struct grf_softc *sc; 183 int unit = GRFUNIT(dev); 184 int rv = 0; 185 186 if (grf_softc == NULL || unit >= numgrf) 187 return ENXIO; 188 189 sc = &grf_softc[unit]; 190 if (sc->mfb_sc == NULL) 191 rv = ENXIO; 192 193 return rv; 194 } 195 196 int 197 grfclose(dev_t dev, int flag, int mode, struct lwp *l) 198 { 199 struct grf_softc *sc; 200 int unit = GRFUNIT(dev); 201 int rv = 0; 202 203 if (grf_softc == NULL || unit >= numgrf) 204 return ENXIO; 205 206 sc = &grf_softc[unit]; 207 if (sc->mfb_sc != NULL) 208 macfb_clear(sc->mfb_sc->sc_dc); /* clear the display */ 209 else 210 rv = ENXIO; 211 212 return rv; 213 } 214 215 int 216 grfioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 217 { 218 struct grf_softc *sc; 219 struct macfb_devconfig *dc; 220 #if defined(GRF_COMPAT) || (NGRF > 0) 221 struct grfinfo *gd; 222 #endif /* GRF_COMPAT || (NGRF > 0) */ 223 struct grfmode *gm; 224 int unit = GRFUNIT(dev); 225 int rv; 226 227 if (grf_softc == NULL || unit >= numgrf) 228 return ENXIO; 229 230 sc = &grf_softc[unit]; 231 if (sc->mfb_sc == NULL) 232 return ENXIO; 233 234 dc = sc->mfb_sc->sc_dc; 235 236 switch (cmd) { 237 #if defined(GRF_COMPAT) || (NGRF > 0) 238 case GRFIOCGINFO: 239 gd = (struct grfinfo *)data; 240 memset(gd, 0, sizeof(struct grfinfo)); 241 gd->gd_fbaddr = (void *)dc->dc_paddr; 242 gd->gd_fbsize = dc->dc_size; 243 gd->gd_colors = (short)(1 << dc->dc_depth); 244 gd->gd_planes = (short)dc->dc_depth; 245 gd->gd_fbwidth = dc->dc_wid; 246 gd->gd_fbheight = dc->dc_ht; 247 gd->gd_fbrowbytes = dc->dc_rowbytes; 248 gd->gd_dwidth = dc->dc_raster.width; 249 gd->gd_dheight = dc->dc_raster.height; 250 rv = 0; 251 break; 252 #endif /* GRF_COMPAT || (NGRF > 0) */ 253 254 case GRFIOCON: 255 case GRFIOCOFF: 256 /* Nothing to do */ 257 rv = 0; 258 break; 259 260 #if defined(GRF_COMPAT) || (NGRF > 0) 261 case GRFIOCMAP: 262 rv = grfmap(dev, sc->mfb_sc, (void **)data, l->l_proc); 263 break; 264 265 case GRFIOCUNMAP: 266 rv = grfunmap(dev, sc->mfb_sc, *(void **)data, l->l_proc); 267 break; 268 #endif /* GRF_COMPAT || (NGRF > 0) */ 269 270 case GRFIOCGMODE: 271 gm = (struct grfmode *)data; 272 memset(gm, 0, sizeof(struct grfmode)); 273 gm->fbbase = (char *)dc->dc_vaddr; 274 gm->fbsize = dc->dc_size; 275 gm->fboff = dc->dc_offset; 276 gm->rowbytes = dc->dc_rowbytes; 277 gm->width = dc->dc_wid; 278 gm->height = dc->dc_ht; 279 gm->psize = dc->dc_depth; 280 rv = 0; 281 break; 282 283 case GRFIOCLISTMODES: 284 case GRFIOCGETMODE: 285 case GRFIOCSETMODE: 286 /* NONE of these operations are (officially) supported. */ 287 default: 288 rv = EINVAL; 289 break; 290 } 291 return rv; 292 } 293 294 paddr_t 295 grfmmap(dev_t dev, off_t off, int prot) 296 { 297 struct grf_softc *sc; 298 struct macfb_devconfig *dc; 299 int unit = GRFUNIT(dev); 300 301 if (grf_softc == NULL || unit >= numgrf) 302 return ENXIO; 303 304 sc = &grf_softc[unit]; 305 if (sc->mfb_sc == NULL) 306 return ENXIO; 307 308 dc = sc->mfb_sc->sc_dc; 309 310 if ((u_int)off < m68k_round_page(dc->dc_offset + dc->dc_size)) 311 return m68k_btop(dc->dc_paddr + off); 312 313 return (-1); 314 } 315 316 int 317 grfmap(dev_t dev, struct macfb_softc *sc, void **addrp, struct proc *p) 318 { 319 size_t len; 320 int error; 321 322 len = m68k_round_page(sc->sc_dc->dc_offset + sc->sc_dc->dc_size); 323 error = uvm_mmap_dev(p, addrp, len, dev, 0); 324 325 /* Offset into page: */ 326 *addrp = (char *)*addrp + sc->sc_dc->dc_offset; 327 328 return (error); 329 } 330 331 int 332 grfunmap(dev_t dev, struct macfb_softc *sc, void *addr, struct proc *p) 333 { 334 size_t size; 335 336 addr = (char *)addr - sc->sc_dc->dc_offset; 337 338 if (addr <= 0) 339 return (-1); 340 341 size = m68k_round_page(sc->sc_dc->dc_offset + sc->sc_dc->dc_size); 342 uvm_unmap(&p->p_vmspace->vm_map, (vaddr_t)addr, (vaddr_t)addr + size); 343 return 0; 344 } 345
Indexes created Thu Oct 02 14:10:14 GMT 2025