leo.c revision 1.11
1 /* $NetBSD: leo.c,v 1.11 2007/03/04 05:59:41 christos 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/cdefs.h> 57 __KERNEL_RCSID(0, "$NetBSD: leo.c,v 1.11 2007/03/04 05:59:41 christos Exp $"); 58 59 #include <sys/param.h> 60 #include <sys/systm.h> 61 #include <sys/proc.h> 62 #include <sys/errno.h> 63 #include <sys/device.h> 64 #include <sys/conf.h> 65 #include <sys/ioctl.h> 66 #include <machine/cpu.h> 67 #include <machine/bus.h> 68 #include <machine/iomap.h> 69 #include <machine/scu.h> 70 #include <atari/vme/vmevar.h> 71 #include <atari/vme/leovar.h> 72 #include <atari/vme/leoioctl.h> 73 74 static struct leo_addresses { 75 u_long reg_addr; 76 u_int reg_size; 77 u_long mem_addr; 78 u_int mem_size; 79 } leostd[] = { 80 { 0xfed90000, 0x100, 0xfec00000, 0x100000 } 81 }; 82 83 #define NLEOSTD (sizeof(leostd) / sizeof(leostd[0])) 84 85 struct leo_softc { 86 struct device sc_dev; /* XXX what goes here? */ 87 bus_space_tag_t sc_iot; 88 bus_space_tag_t sc_memt; 89 bus_space_handle_t sc_ioh; 90 bus_space_handle_t sc_memh; 91 int sc_flags; 92 int sc_maddr; 93 u_int sc_msize; 94 }; 95 96 #define LEO_SC_FLAGS_INUSE 1 97 98 static int leo_match __P((struct device *, struct cfdata *, void *)); 99 static void leo_attach __P((struct device *, struct device *, void *)); 100 static int leo_probe __P((bus_space_tag_t *, bus_space_tag_t *, 101 bus_space_handle_t *, bus_space_handle_t *, 102 u_int, u_int)); 103 static int leo_init __P((struct leo_softc *, int)); 104 static int leo_scroll __P((struct leo_softc *, int)); 105 106 CFATTACH_DECL(leo, sizeof(struct leo_softc), 107 leo_match, leo_attach, NULL, NULL); 108 109 extern struct cfdriver leo_cd; 110 111 dev_type_open(leoopen); 112 dev_type_close(leoclose); 113 dev_type_read(leomove); 114 dev_type_ioctl(leoioctl); 115 dev_type_mmap(leommap); 116 117 const struct cdevsw leo_cdevsw = { 118 leoopen, leoclose, leomove, leomove, leoioctl, 119 nostop, notty, nopoll, leommap, nokqfilter, 120 }; 121 122 static int 123 leo_match(parent, cfp, aux) 124 struct device *parent; 125 struct cfdata *cfp; 126 void *aux; 127 { 128 struct vme_attach_args *va = aux; 129 int i; 130 bus_space_tag_t iot; 131 bus_space_tag_t memt; 132 bus_space_handle_t ioh; 133 bus_space_handle_t memh; 134 135 /* 136 * We are passed our configuration in the attachment arguments. 137 * The configuration information may be partially unspecified. 138 * For any unspecified configuration parameters, we fill in those 139 * parameters with data for a "standard" configuration. 140 * Once we have a fully specified configuration, we try to probe 141 * a card with that configuration. 142 * The Leonardo only has one configuration and it isn't likely 143 * to change, but this routine doesn't assume that's the case. 144 */ 145 iot = va->va_iot; 146 memt = va->va_memt; 147 for (i = 0; i < NLEOSTD; i++) { 148 struct leo_addresses *leo_ap = &leostd[i]; 149 int found = 0; 150 struct vme_attach_args vat = *va; 151 152 if (vat.va_irq != VMECF_IRQ_DEFAULT) { 153 printf("leo_match: config error: no irq support\n"); 154 return 0; 155 } 156 if (vat.va_iobase == VMECF_IOPORT_DEFAULT) 157 vat.va_iobase = leo_ap->reg_addr; 158 if (vat.va_maddr == VMECF_MEM_DEFAULT) 159 vat.va_maddr = leo_ap->mem_addr; 160 if (vat.va_iosize == VMECF_IOSIZE_DEFAULT) 161 vat.va_iosize = leo_ap->reg_size; 162 if (vat.va_msize == VMECF_MEMSIZ_DEFAULT) 163 vat.va_msize = leo_ap->mem_size; 164 if (bus_space_map(iot, vat.va_iobase, vat.va_iosize, 0, &ioh)) { 165 printf("leo_match: cannot map io area\n"); 166 return 0; 167 } 168 if (bus_space_map(memt, vat.va_maddr, vat.va_msize, 169 BUS_SPACE_MAP_LINEAR|BUS_SPACE_MAP_CACHEABLE, 170 &memh)) { 171 bus_space_unmap(iot, ioh, vat.va_iosize); 172 printf("leo_match: cannot map memory area\n"); 173 return 0; 174 } 175 found = leo_probe(&iot, &memt, &ioh, &memh, 176 vat.va_iosize, vat.va_msize); 177 bus_space_unmap(iot, ioh, vat.va_iosize); 178 bus_space_unmap(memt, memh, vat.va_msize); 179 if (found) { 180 *va = vat; 181 return 1; 182 } 183 } 184 return 0; 185 } 186 187 static int 188 leo_probe(iot, memt, ioh, memh, iosize, msize) 189 bus_space_tag_t *iot, *memt; 190 bus_space_handle_t *ioh, *memh; 191 u_int iosize, msize; 192 { 193 194 /* Test that our highest register is within the io range. */ 195 if (0xca > iosize) /* XXX */ 196 return 0; 197 /* Test if we can peek each register. */ 198 if (!bus_space_peek_1(*iot, *ioh, LEO_REG_MSBSCROLL)) 199 return 0; 200 if (!bus_space_peek_1(*iot, *ioh, LEO_REG_LSBSCROLL)) 201 return 0; 202 /* 203 * Write a test pattern at the start and end of the memory region, 204 * and test if the pattern can be read back. If so, the region is 205 * backed by memory (i.e. the card is present). 206 * On the Leonardo, the first byte of each longword isn't backed by 207 * physical memory, so we only compare the three low-order bytes 208 * with the test pattern. 209 */ 210 bus_space_write_4(*memt, *memh, 0, 0xa5a5a5a5); 211 if ((bus_space_read_4(*memt, *memh, 0) & 0xffffff) != 0xa5a5a5) 212 return 0; 213 bus_space_write_4(*memt, *memh, msize - 4, 0xa5a5a5a5); 214 if ((bus_space_read_4(*memt, *memh, msize - 4) & 0xffffff) 215 != 0xa5a5a5) 216 return 0; 217 return 1; 218 } 219 220 static void 221 leo_attach(parent, self, aux) 222 struct device *parent, *self; 223 void *aux; 224 { 225 struct leo_softc *sc = (struct leo_softc *)self; 226 struct vme_attach_args *va = aux; 227 bus_space_handle_t ioh; 228 bus_space_handle_t memh; 229 #ifndef SET_REGION 230 int i; 231 #endif 232 233 printf("\n"); 234 if (bus_space_map(va->va_iot, va->va_iobase, va->va_iosize, 0, &ioh)) 235 panic("leo_attach: cannot map io area"); 236 if (bus_space_map(va->va_memt, va->va_maddr, va->va_msize, 237 BUS_SPACE_MAP_LINEAR|BUS_SPACE_MAP_CACHEABLE, &memh)) 238 panic("leo_attach: cannot map memory area"); 239 #ifdef SET_REGION /* XXX seems to be unimplemented on atari? */ 240 bus_space_set_region_4(va->va_memt, memh, 0, 0, va->va_msize >> 2); 241 #else 242 for (i = 0; i < (va->va_msize >> 2); i++) 243 bus_space_write_4(va->va_memt, memh, i << 2, 0); 244 #endif 245 sc->sc_iot = va->va_iot; 246 sc->sc_ioh = ioh; 247 sc->sc_memt = va->va_memt; 248 sc->sc_memh = memh; 249 sc->sc_flags = 0; 250 sc->sc_maddr = va->va_maddr; 251 sc->sc_msize = va->va_msize; 252 leo_init(sc, 512); 253 leo_scroll(sc, 0); 254 } 255 256 int 257 leoopen(dev, flags, devtype, p) 258 dev_t dev; 259 int flags, devtype; 260 struct proc *p; 261 { 262 int unit = minor(dev); 263 struct leo_softc *sc; 264 int r; 265 266 if (unit >= leo_cd.cd_ndevs) 267 return ENXIO; 268 sc = leo_cd.cd_devs[unit]; 269 if (!sc) 270 return ENXIO; 271 if (sc->sc_flags & LEO_SC_FLAGS_INUSE) 272 return EBUSY; 273 r = leo_init(sc, 512); 274 if (r != 0) 275 return r; 276 r = leo_scroll(sc, 0); 277 if (r != 0) 278 return r; 279 sc->sc_flags |= LEO_SC_FLAGS_INUSE; 280 return 0; 281 } 282 283 static int 284 leo_init(sc, ysize) 285 struct leo_softc *sc; 286 int ysize; 287 { 288 289 if ((ysize != 256) && (ysize != 384) && (ysize != 512)) 290 return EINVAL; 291 /* XXX */ 292 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x00, 0x6); 293 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x08, 0x0); 294 if (ysize == 384) 295 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x10, 0x10); 296 else 297 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x10, 0x11); 298 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x18, 0x0); 299 if (ysize == 384) 300 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x20, 0x50); 301 else 302 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x20, 0x51); 303 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x28, 0x0); 304 if (ysize == 384) 305 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x30, 0x56); 306 else 307 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x30, 0x57); 308 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x38, 0x0); 309 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x40, 0x6); 310 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x48, 0x0); 311 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x50, 0x25); 312 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x58, 0x0); 313 if (ysize == 256) { 314 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x60, 0x1f); 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, 0x29); 317 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x78, 0x1); 318 } else if (ysize == 384) { 319 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x60, 0xa5); 320 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x68, 0x1); 321 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x70, 0xa7); 322 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x78, 0x1); 323 } else { 324 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x60, 0x1d); 325 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x68, 0x2); 326 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x70, 0x27); 327 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x78, 0x2); 328 } 329 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xb8, 0x10); 330 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xb0, 0x10); 331 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x80, 0x4); 332 if (ysize == 384) 333 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xc8, 0x21); 334 else 335 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xc8, 0x20); 336 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xc0, 0x40); 337 return 0; 338 } 339 340 static int 341 leo_scroll(sc, scroll) 342 struct leo_softc *sc; 343 int scroll; 344 { 345 346 if ((scroll < 0) || (scroll > 255)) 347 return EINVAL; 348 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LEO_REG_MSBSCROLL, 349 (scroll >> 6) && 0xff); 350 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LEO_REG_LSBSCROLL, 351 (scroll << 2) && 0xff); 352 return 0; 353 } 354 355 int 356 leoclose(dev, flags, devtype, p) 357 dev_t dev; 358 int flags, devtype; 359 struct proc *p; 360 { 361 struct leo_softc *sc; 362 363 sc = leo_cd.cd_devs[minor(dev)]; 364 sc->sc_flags &= ~LEO_SC_FLAGS_INUSE; 365 return 0; 366 } 367 368 #define SMALLBSIZE 32 369 370 int 371 leomove(dev, uio, flags) 372 dev_t dev; 373 struct uio *uio; 374 int flags; 375 { 376 struct leo_softc *sc; 377 int length, size, error; 378 u_int8_t smallbuf[SMALLBSIZE]; 379 off_t offset; 380 381 sc = leo_cd.cd_devs[minor(dev)]; 382 if (uio->uio_offset > sc->sc_msize) 383 return 0; 384 length = sc->sc_msize - uio->uio_offset; 385 if (length > uio->uio_resid) 386 length = uio->uio_resid; 387 while (length > 0) { 388 size = length; 389 if (size > SMALLBSIZE) 390 size = SMALLBSIZE; 391 length -= size; 392 offset = uio->uio_offset; 393 if (uio->uio_rw == UIO_READ) 394 bus_space_read_region_1(sc->sc_memt, sc->sc_memh, 395 offset, smallbuf, size); 396 if ((error = uiomove((void *)smallbuf, size, uio))) 397 return (error); 398 if (uio->uio_rw == UIO_WRITE) 399 bus_space_write_region_1(sc->sc_memt, sc->sc_memh, 400 offset, smallbuf, size); 401 } 402 return 0; 403 } 404 405 int 406 leoioctl(dev, cmd, data, flags, p) 407 dev_t dev; 408 u_long cmd; 409 void *data; 410 int flags; 411 struct proc *p; 412 { 413 struct leo_softc *sc; 414 415 sc = leo_cd.cd_devs[minor(dev)]; 416 switch (cmd) { 417 case LIOCYRES: 418 return leo_init(sc, *(int *)data); 419 break; 420 case LIOCSCRL: 421 return leo_scroll(sc, *(int *)data); 422 break; 423 default: 424 return EINVAL; 425 break; 426 } 427 } 428 429 paddr_t 430 leommap(dev, offset, prot) 431 dev_t dev; 432 off_t offset; 433 int prot; 434 { 435 struct leo_softc *sc; 436 437 sc = leo_cd.cd_devs[minor(dev)]; 438 if (offset >= 0 && offset < sc->sc_msize) 439 return m68k_btop(sc->sc_maddr + offset); 440 return -1; 441 } 442
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