leo.c revision 1.4
1 /* $NetBSD: leo.c,v 1.4 2002/09/06 13:18:43 gehenna 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)); 102 103 struct cfattach leo_ca = { 104 sizeof(struct leo_softc), leo_match, leo_attach 105 }; 106 107 extern struct cfdriver leo_cd; 108 109 dev_type_open(leoopen); 110 dev_type_close(leoclose); 111 dev_type_read(leomove); 112 dev_type_ioctl(leoioctl); 113 dev_type_mmap(leommap); 114 115 const struct cdevsw leo_cdevsw = { 116 leoopen, leoclose, leomove, leomove, leoioctl, 117 nostop, notty, nopoll, leommap, 118 }; 119 120 static int 121 leo_match(parent, cfp, aux) 122 struct device *parent; 123 struct cfdata *cfp; 124 void *aux; 125 { 126 struct vme_attach_args *va = aux; 127 int i; 128 bus_space_tag_t iot; 129 bus_space_tag_t memt; 130 bus_space_handle_t ioh; 131 bus_space_handle_t memh; 132 133 /* 134 * We are passed our configuration in the attachment arguments. 135 * The configuration information may be partially unspecified. 136 * For any unspecified configuration parameters, we fill in those 137 * parameters with data for a "standard" configuration. 138 * Once we have a fully specified configuration, we try to probe 139 * a card with that configuration. 140 * The Leonardo only has one configuration and it isn't likely 141 * to change, but this routine doesn't assume that's the case. 142 */ 143 iot = va->va_iot; 144 memt = va->va_memt; 145 for (i = 0; i < NLEOSTD; i++) { 146 struct leo_addresses *leo_ap = &leostd[i]; 147 int found = 0; 148 struct vme_attach_args vat = *va; 149 150 if (vat.va_irq != VMECF_IRQ_DEFAULT) { 151 printf("leo_match: config error: no irq support\n"); 152 return 0; 153 } 154 if (vat.va_iobase == VMECF_IOPORT_DEFAULT) 155 vat.va_iobase = leo_ap->reg_addr; 156 if (vat.va_maddr == VMECF_MEM_DEFAULT) 157 vat.va_maddr = leo_ap->mem_addr; 158 if (vat.va_iosize == VMECF_IOSIZE_DEFAULT) 159 vat.va_iosize = leo_ap->reg_size; 160 if (vat.va_msize == VMECF_MEMSIZ_DEFAULT) 161 vat.va_msize = leo_ap->mem_size; 162 if (bus_space_map(iot, vat.va_iobase, vat.va_iosize, 0, &ioh)) { 163 printf("leo_match: cannot map io area\n"); 164 return 0; 165 } 166 if (bus_space_map(memt, vat.va_maddr, vat.va_msize, 167 BUS_SPACE_MAP_LINEAR|BUS_SPACE_MAP_CACHEABLE, 168 &memh)) { 169 bus_space_unmap(iot, ioh, vat.va_iosize); 170 printf("leo_match: cannot map memory area\n"); 171 return 0; 172 } 173 found = leo_probe(&iot, &memt, &ioh, &memh, 174 vat.va_iosize, vat.va_msize); 175 bus_space_unmap(iot, ioh, vat.va_iosize); 176 bus_space_unmap(memt, memh, vat.va_msize); 177 if (found) { 178 *va = vat; 179 return 1; 180 } 181 } 182 return 0; 183 } 184 185 static int 186 leo_probe(iot, memt, ioh, memh, iosize, msize) 187 bus_space_tag_t *iot, *memt; 188 bus_space_handle_t *ioh, *memh; 189 u_int iosize, msize; 190 { 191 192 /* Test that our highest register is within the io range. */ 193 if (0xca > iosize) /* XXX */ 194 return 0; 195 /* Test if we can peek each register. */ 196 if (!bus_space_peek_1(*iot, *ioh, LEO_REG_MSBSCROLL)) 197 return 0; 198 if (!bus_space_peek_1(*iot, *ioh, LEO_REG_LSBSCROLL)) 199 return 0; 200 /* 201 * Write a test pattern at the start and end of the memory region, 202 * and test if the pattern can be read back. If so, the region is 203 * backed by memory (i.e. the card is present). 204 * On the Leonardo, the first byte of each longword isn't backed by 205 * physical memory, so we only compare the three low-order bytes 206 * with the test pattern. 207 */ 208 bus_space_write_4(*memt, *memh, 0, 0xa5a5a5a5); 209 if ((bus_space_read_4(*memt, *memh, 0) & 0xffffff) != 0xa5a5a5) 210 return 0; 211 bus_space_write_4(*memt, *memh, msize - 4, 0xa5a5a5a5); 212 if ((bus_space_read_4(*memt, *memh, msize - 4) & 0xffffff) 213 != 0xa5a5a5) 214 return 0; 215 return 1; 216 } 217 218 static void 219 leo_attach(parent, self, aux) 220 struct device *parent, *self; 221 void *aux; 222 { 223 struct leo_softc *sc = (struct leo_softc *)self; 224 struct vme_attach_args *va = aux; 225 bus_space_handle_t ioh; 226 bus_space_handle_t memh; 227 #ifndef SET_REGION 228 int i; 229 #endif 230 231 printf("\n"); 232 if (bus_space_map(va->va_iot, va->va_iobase, va->va_iosize, 0, &ioh)) 233 panic("leo_attach: cannot map io area\n"); 234 if (bus_space_map(va->va_memt, va->va_maddr, va->va_msize, 235 BUS_SPACE_MAP_LINEAR|BUS_SPACE_MAP_CACHEABLE, &memh)) 236 panic("leo_attach: cannot map memory area\n"); 237 #ifdef SET_REGION /* XXX seems to be unimplemented on atari? */ 238 bus_space_set_region_4(va->va_memt, memh, 0, 0, va->va_msize >> 2); 239 #else 240 for (i = 0; i < (va->va_msize >> 2); i++) 241 bus_space_write_4(va->va_memt, memh, i << 2, 0); 242 #endif 243 sc->sc_iot = va->va_iot; 244 sc->sc_ioh = ioh; 245 sc->sc_memt = va->va_memt; 246 sc->sc_memh = memh; 247 sc->sc_flags = 0; 248 sc->sc_maddr = va->va_maddr; 249 sc->sc_msize = va->va_msize; 250 leo_init(sc, 512); 251 leo_scroll(sc, 0); 252 } 253 254 int 255 leoopen(dev, flags, devtype, p) 256 dev_t dev; 257 int flags, devtype; 258 struct proc *p; 259 { 260 int unit = minor(dev); 261 struct leo_softc *sc; 262 int r; 263 264 if (unit >= leo_cd.cd_ndevs) 265 return ENXIO; 266 sc = leo_cd.cd_devs[unit]; 267 if (!sc) 268 return ENXIO; 269 if (sc->sc_flags & LEO_SC_FLAGS_INUSE) 270 return EBUSY; 271 r = leo_init(sc, 512); 272 if (r != 0) 273 return r; 274 r = leo_scroll(sc, 0); 275 if (r != 0) 276 return r; 277 sc->sc_flags |= LEO_SC_FLAGS_INUSE; 278 return 0; 279 } 280 281 static int 282 leo_init(sc, ysize) 283 struct leo_softc *sc; 284 int ysize; 285 { 286 287 if ((ysize != 256) && (ysize != 384) && (ysize != 512)) 288 return EINVAL; 289 /* XXX */ 290 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x00, 0x6); 291 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x08, 0x0); 292 if (ysize == 384) 293 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x10, 0x10); 294 else 295 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x10, 0x11); 296 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x18, 0x0); 297 if (ysize == 384) 298 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x20, 0x50); 299 else 300 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x20, 0x51); 301 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x28, 0x0); 302 if (ysize == 384) 303 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x30, 0x56); 304 else 305 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x30, 0x57); 306 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x38, 0x0); 307 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x40, 0x6); 308 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x48, 0x0); 309 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x50, 0x25); 310 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x58, 0x0); 311 if (ysize == 256) { 312 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x60, 0x1f); 313 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x68, 0x1); 314 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x70, 0x29); 315 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x78, 0x1); 316 } else if (ysize == 384) { 317 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x60, 0xa5); 318 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x68, 0x1); 319 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x70, 0xa7); 320 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x78, 0x1); 321 } else { 322 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x60, 0x1d); 323 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x68, 0x2); 324 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x70, 0x27); 325 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x78, 0x2); 326 } 327 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xb8, 0x10); 328 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xb0, 0x10); 329 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x80, 0x4); 330 if (ysize == 384) 331 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xc8, 0x21); 332 else 333 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xc8, 0x20); 334 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xc0, 0x40); 335 return 0; 336 } 337 338 static int 339 leo_scroll(sc, scroll) 340 struct leo_softc *sc; 341 int scroll; 342 { 343 344 if ((scroll < 0) || (scroll > 255)) 345 return EINVAL; 346 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LEO_REG_MSBSCROLL, 347 (scroll >> 6) && 0xff); 348 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LEO_REG_LSBSCROLL, 349 (scroll << 2) && 0xff); 350 return 0; 351 } 352 353 int 354 leoclose(dev, flags, devtype, p) 355 dev_t dev; 356 int flags, devtype; 357 struct proc *p; 358 { 359 struct leo_softc *sc; 360 361 sc = leo_cd.cd_devs[minor(dev)]; 362 sc->sc_flags &= ~LEO_SC_FLAGS_INUSE; 363 return 0; 364 } 365 366 #define SMALLBSIZE 32 367 368 int 369 leomove(dev, uio, flags) 370 dev_t dev; 371 struct uio *uio; 372 int flags; 373 { 374 struct leo_softc *sc; 375 int length, size, error; 376 u_int8_t smallbuf[SMALLBSIZE]; 377 off_t offset; 378 379 sc = leo_cd.cd_devs[minor(dev)]; 380 if (uio->uio_offset > sc->sc_msize) 381 return 0; 382 length = sc->sc_msize - uio->uio_offset; 383 if (length > uio->uio_resid) 384 length = uio->uio_resid; 385 while (length > 0) { 386 size = length; 387 if (size > SMALLBSIZE) 388 size = SMALLBSIZE; 389 length -= size; 390 offset = uio->uio_offset; 391 if (uio->uio_rw == UIO_READ) 392 bus_space_read_region_1(sc->sc_memt, sc->sc_memh, 393 offset, smallbuf, size); 394 if ((error = uiomove((caddr_t)smallbuf, size, uio))) 395 return (error); 396 if (uio->uio_rw == UIO_WRITE) 397 bus_space_write_region_1(sc->sc_memt, sc->sc_memh, 398 offset, smallbuf, size); 399 } 400 return 0; 401 } 402 403 int 404 leoioctl(dev, cmd, data, flags, p) 405 dev_t dev; 406 u_long cmd; 407 caddr_t data; 408 int flags; 409 struct proc *p; 410 { 411 struct leo_softc *sc; 412 413 sc = leo_cd.cd_devs[minor(dev)]; 414 switch (cmd) { 415 case LIOCYRES: 416 return leo_init(sc, *(int *)data); 417 break; 418 case LIOCSCRL: 419 return leo_scroll(sc, *(int *)data); 420 break; 421 default: 422 return EINVAL; 423 break; 424 } 425 } 426 427 paddr_t 428 leommap(dev, offset, prot) 429 dev_t dev; 430 off_t offset; 431 int prot; 432 { 433 struct leo_softc *sc; 434 435 sc = leo_cd.cd_devs[minor(dev)]; 436 if (offset >= 0 && offset < sc->sc_msize) 437 return m68k_btop(sc->sc_maddr + offset); 438 return -1; 439 } 440
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