leo.c revision 1.2
1 /* $NetBSD: leo.c,v 1.2 1999/10/25 14:52:56 leo Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 maximum entropy <entropy (at) zippy.bernstein.com> 5 * Copyright (c) 1997 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the NetBSD 19 * Foundation, Inc. and its contributors. 20 * 4. Neither the name of The NetBSD Foundation nor the names of its 21 * contributors may be used to endorse or promote products derived 22 * from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 25 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 26 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 27 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 28 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 34 * POSSIBILITY OF SUCH DAMAGE. 35 */ 36 37 /* 38 * Driver for the Circad Leonardo 1.2 from Lexicor, a 24-bit true color 39 * VME graphics card based on the Texas Instruments TMS34061. 40 * 41 * Written by maximum entropy <entropy (at) zippy.bernstein.com>, December 5, 1997. 42 * 43 * This driver was written from scratch, but I referred to several other 44 * drivers in the NetBSD distribution as examples. The file I referred to 45 * the most was /sys/arch/atari/vme/if_le_vme.c. Due credits: 46 * Copyright (c) 1997 Leo Weppelman. All rights reserved. 47 * Copyright (c) 1995 Charles M. Hannum. All rights reserved. 48 * Copyright (c) 1992, 1993 49 * The Regents of the University of California. All rights reserved. 50 * This code is derived from software contributed to Berkeley by 51 * Ralph Campbell and Rick Macklem. 52 * This product includes software developed by the University of 53 * California, Berkeley and its contributors. 54 */ 55 56 #include <sys/param.h> 57 #include <sys/systm.h> 58 #include <sys/proc.h> 59 #include <sys/errno.h> 60 #include <sys/device.h> 61 #include <sys/conf.h> 62 #include <sys/ioctl.h> 63 #include <machine/cpu.h> 64 #include <machine/bus.h> 65 #include <machine/iomap.h> 66 #include <machine/scu.h> 67 #include <atari/vme/vmevar.h> 68 #include <atari/vme/leovar.h> 69 #include <atari/vme/leoioctl.h> 70 71 static struct leo_addresses { 72 u_long reg_addr; 73 u_int reg_size; 74 u_long mem_addr; 75 u_int mem_size; 76 } leostd[] = { 77 { 0xfed90000, 0x100, 0xfec00000, 0x100000 } 78 }; 79 80 #define NLEOSTD (sizeof(leostd) / sizeof(leostd[0])) 81 82 struct leo_softc { 83 struct device sc_dev; /* XXX what goes here? */ 84 bus_space_tag_t sc_iot; 85 bus_space_tag_t sc_memt; 86 bus_space_handle_t sc_ioh; 87 bus_space_handle_t sc_memh; 88 int sc_flags; 89 int sc_maddr; 90 u_int sc_msize; 91 }; 92 93 #define LEO_SC_FLAGS_INUSE 1 94 95 static int leo_match __P((struct device *, struct cfdata *, void *)); 96 static void leo_attach __P((struct device *, struct device *, void *)); 97 static int leo_probe __P((bus_space_tag_t *, bus_space_tag_t *, 98 bus_space_handle_t *, bus_space_handle_t *, 99 u_int, u_int)); 100 static int leo_init __P((struct leo_softc *, int)); 101 static int leo_scroll __P((struct leo_softc *, int)); 102 static int leomove __P((dev_t, struct uio *, int)); 103 104 dev_decl(leo,open); 105 dev_decl(leo,close); 106 dev_decl(leo,read); 107 dev_decl(leo,write); 108 dev_decl(leo,ioctl); 109 dev_decl(leo,mmap); 110 111 struct cfattach leo_ca = { 112 sizeof(struct leo_softc), leo_match, leo_attach 113 }; 114 115 extern struct cfdriver leo_cd; 116 117 static int 118 leo_match(parent, cfp, aux) 119 struct device *parent; 120 struct cfdata *cfp; 121 void *aux; 122 { 123 struct vme_attach_args *va = aux; 124 int i; 125 bus_space_tag_t iot; 126 bus_space_tag_t memt; 127 bus_space_handle_t ioh; 128 bus_space_handle_t memh; 129 130 /* 131 * We are passed our configuration in the attachment arguments. 132 * The configuration information may be partially unspecified. 133 * For any unspecified configuration parameters, we fill in those 134 * parameters with data for a "standard" configuration. 135 * Once we have a fully specified configuration, we try to probe 136 * a card with that configuration. 137 * The Leonardo only has one configuration and it isn't likely 138 * to change, but this routine doesn't assume that's the case. 139 */ 140 iot = va->va_iot; 141 memt = va->va_memt; 142 for (i = 0; i < NLEOSTD; i++) { 143 struct leo_addresses *leo_ap = &leostd[i]; 144 int found = 0; 145 struct vme_attach_args vat = *va; 146 147 if (vat.va_irq != VMECF_IRQ_DEFAULT) { 148 printf("leo_match: config error: no irq support\n"); 149 return 0; 150 } 151 if (vat.va_iobase == VMECF_IOPORT_DEFAULT) 152 vat.va_iobase = leo_ap->reg_addr; 153 if (vat.va_maddr == VMECF_MEM_DEFAULT) 154 vat.va_maddr = leo_ap->mem_addr; 155 if (vat.va_iosize == VMECF_IOSIZE_DEFAULT) 156 vat.va_iosize = leo_ap->reg_size; 157 if (vat.va_msize == VMECF_MEMSIZ_DEFAULT) 158 vat.va_msize = leo_ap->mem_size; 159 if (bus_space_map(iot, vat.va_iobase, vat.va_iosize, 0, &ioh)) { 160 printf("leo_match: cannot map io area\n"); 161 return 0; 162 } 163 if (bus_space_map(memt, vat.va_maddr, vat.va_msize, 164 BUS_SPACE_MAP_LINEAR|BUS_SPACE_MAP_CACHEABLE, 165 &memh)) { 166 bus_space_unmap(iot, ioh, vat.va_iosize); 167 printf("leo_match: cannot map memory area\n"); 168 return 0; 169 } 170 found = leo_probe(&iot, &memt, &ioh, &memh, 171 vat.va_iosize, vat.va_msize); 172 bus_space_unmap(iot, ioh, vat.va_iosize); 173 bus_space_unmap(memt, memh, vat.va_msize); 174 if (found) { 175 *va = vat; 176 return 1; 177 } 178 } 179 return 0; 180 } 181 182 static int 183 leo_probe(iot, memt, ioh, memh, iosize, msize) 184 bus_space_tag_t *iot, *memt; 185 bus_space_handle_t *ioh, *memh; 186 u_int iosize, msize; 187 { 188 189 /* Test that our highest register is within the io range. */ 190 if (0xca > iosize) /* XXX */ 191 return 0; 192 /* Test if we can peek each register. */ 193 if (!bus_space_peek_1(*iot, *ioh, LEO_REG_MSBSCROLL)) 194 return 0; 195 if (!bus_space_peek_1(*iot, *ioh, LEO_REG_LSBSCROLL)) 196 return 0; 197 /* 198 * Write a test pattern at the start and end of the memory region, 199 * and test if the pattern can be read back. If so, the region is 200 * backed by memory (i.e. the card is present). 201 * On the Leonardo, the first byte of each longword isn't backed by 202 * physical memory, so we only compare the three low-order bytes 203 * with the test pattern. 204 */ 205 bus_space_write_4(*memt, *memh, 0, 0xa5a5a5a5); 206 if ((bus_space_read_4(*memt, *memh, 0) & 0xffffff) != 0xa5a5a5) 207 return 0; 208 bus_space_write_4(*memt, *memh, msize - 4, 0xa5a5a5a5); 209 if ((bus_space_read_4(*memt, *memh, msize - 4) & 0xffffff) 210 != 0xa5a5a5) 211 return 0; 212 return 1; 213 } 214 215 static void 216 leo_attach(parent, self, aux) 217 struct device *parent, *self; 218 void *aux; 219 { 220 struct leo_softc *sc = (struct leo_softc *)self; 221 struct vme_attach_args *va = aux; 222 bus_space_handle_t ioh; 223 bus_space_handle_t memh; 224 #ifndef SET_REGION 225 int i; 226 #endif 227 228 printf("\n"); 229 if (bus_space_map(va->va_iot, va->va_iobase, va->va_iosize, 0, &ioh)) 230 panic("leo_attach: cannot map io area\n"); 231 if (bus_space_map(va->va_memt, va->va_maddr, va->va_msize, 232 BUS_SPACE_MAP_LINEAR|BUS_SPACE_MAP_CACHEABLE, &memh)) 233 panic("leo_attach: cannot map memory area\n"); 234 #ifdef SET_REGION /* XXX seems to be unimplemented on atari? */ 235 bus_space_set_region_4(va->va_memt, memh, 0, 0, va->va_msize >> 2); 236 #else 237 for (i = 0; i < (va->va_msize >> 2); i++) 238 bus_space_write_4(va->va_memt, memh, i << 2, 0); 239 #endif 240 sc->sc_iot = va->va_iot; 241 sc->sc_ioh = ioh; 242 sc->sc_memt = va->va_memt; 243 sc->sc_memh = memh; 244 sc->sc_flags = 0; 245 sc->sc_maddr = va->va_maddr; 246 sc->sc_msize = va->va_msize; 247 leo_init(sc, 512); 248 leo_scroll(sc, 0); 249 } 250 251 int 252 leoopen(dev, flags, devtype, p) 253 dev_t dev; 254 int flags, devtype; 255 struct proc *p; 256 { 257 int unit = minor(dev); 258 struct leo_softc *sc; 259 int r; 260 261 if (unit >= leo_cd.cd_ndevs) 262 return ENXIO; 263 sc = leo_cd.cd_devs[unit]; 264 if (!sc) 265 return ENXIO; 266 if (sc->sc_flags & LEO_SC_FLAGS_INUSE) 267 return EBUSY; 268 r = leo_init(sc, 512); 269 if (r != 0) 270 return r; 271 r = leo_scroll(sc, 0); 272 if (r != 0) 273 return r; 274 sc->sc_flags |= LEO_SC_FLAGS_INUSE; 275 return 0; 276 } 277 278 static int 279 leo_init(sc, ysize) 280 struct leo_softc *sc; 281 int ysize; 282 { 283 284 if ((ysize != 256) && (ysize != 384) && (ysize != 512)) 285 return EINVAL; 286 /* XXX */ 287 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x00, 0x6); 288 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x08, 0x0); 289 if (ysize == 384) 290 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x10, 0x10); 291 else 292 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x10, 0x11); 293 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x18, 0x0); 294 if (ysize == 384) 295 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x20, 0x50); 296 else 297 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x20, 0x51); 298 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x28, 0x0); 299 if (ysize == 384) 300 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x30, 0x56); 301 else 302 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x30, 0x57); 303 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x38, 0x0); 304 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x40, 0x6); 305 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x48, 0x0); 306 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x50, 0x25); 307 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x58, 0x0); 308 if (ysize == 256) { 309 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x60, 0x1f); 310 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x68, 0x1); 311 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x70, 0x29); 312 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x78, 0x1); 313 } else if (ysize == 384) { 314 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x60, 0xa5); 315 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x68, 0x1); 316 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x70, 0xa7); 317 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x78, 0x1); 318 } else { 319 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x60, 0x1d); 320 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x68, 0x2); 321 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x70, 0x27); 322 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x78, 0x2); 323 } 324 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xb8, 0x10); 325 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xb0, 0x10); 326 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x80, 0x4); 327 if (ysize == 384) 328 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xc8, 0x21); 329 else 330 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xc8, 0x20); 331 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xc0, 0x40); 332 return 0; 333 } 334 335 static int 336 leo_scroll(sc, scroll) 337 struct leo_softc *sc; 338 int scroll; 339 { 340 341 if ((scroll < 0) || (scroll > 255)) 342 return EINVAL; 343 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LEO_REG_MSBSCROLL, 344 (scroll >> 6) && 0xff); 345 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LEO_REG_LSBSCROLL, 346 (scroll << 2) && 0xff); 347 return 0; 348 } 349 350 int 351 leoclose(dev, flags, devtype, p) 352 dev_t dev; 353 int flags, devtype; 354 struct proc *p; 355 { 356 struct leo_softc *sc; 357 358 sc = leo_cd.cd_devs[minor(dev)]; 359 sc->sc_flags &= ~LEO_SC_FLAGS_INUSE; 360 return 0; 361 } 362 363 #define SMALLBSIZE 32 364 365 static int 366 leomove(dev, uio, flags) 367 dev_t dev; 368 struct uio *uio; 369 int flags; 370 { 371 struct leo_softc *sc; 372 int length, size, error; 373 u_int8_t smallbuf[SMALLBSIZE]; 374 off_t offset; 375 376 sc = leo_cd.cd_devs[minor(dev)]; 377 if (uio->uio_offset > sc->sc_msize) 378 return 0; 379 length = sc->sc_msize - uio->uio_offset; 380 if (length > uio->uio_resid) 381 length = uio->uio_resid; 382 while (length > 0) { 383 size = length; 384 if (size > SMALLBSIZE) 385 size = SMALLBSIZE; 386 length -= size; 387 offset = uio->uio_offset; 388 if (uio->uio_rw == UIO_READ) 389 bus_space_read_region_1(sc->sc_memt, sc->sc_memh, 390 offset, smallbuf, size); 391 if ((error = uiomove((caddr_t)smallbuf, size, uio))) 392 return (error); 393 if (uio->uio_rw == UIO_WRITE) 394 bus_space_write_region_1(sc->sc_memt, sc->sc_memh, 395 offset, smallbuf, size); 396 } 397 return 0; 398 } 399 400 int 401 leoread(dev, uio, flags) 402 dev_t dev; 403 struct uio *uio; 404 int flags; 405 { 406 407 return leomove(dev, uio, flags); 408 } 409 410 int 411 leowrite(dev, uio, flags) 412 dev_t dev; 413 struct uio *uio; 414 int flags; 415 { 416 417 return leomove(dev, uio, flags); 418 } 419 420 int 421 leoioctl(dev, cmd, data, flags, p) 422 dev_t dev; 423 u_long cmd; 424 caddr_t data; 425 int flags; 426 struct proc *p; 427 { 428 struct leo_softc *sc; 429 430 sc = leo_cd.cd_devs[minor(dev)]; 431 switch (cmd) { 432 case LIOCYRES: 433 return leo_init(sc, *(int *)data); 434 break; 435 case LIOCSCRL: 436 return leo_scroll(sc, *(int *)data); 437 break; 438 default: 439 return EINVAL; 440 break; 441 } 442 } 443 444 int 445 leommap(dev, offset, prot) 446 dev_t dev; 447 int offset; 448 int prot; 449 { 450 struct leo_softc *sc; 451 452 sc = leo_cd.cd_devs[minor(dev)]; 453 if (offset >= 0 && offset < sc->sc_msize) 454 return m68k_btop(sc->sc_maddr + offset); 455 return -1; 456 } 457
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