leo.c revision 1.13
1 /* $NetBSD: leo.c,v 1.13 2008/06/13 08:50:12 cegger 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 * 17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 * POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 /* 31 * Driver for the Circad Leonardo 1.2 from Lexicor, a 24-bit true color 32 * VME graphics card based on the Texas Instruments TMS34061. 33 * 34 * Written by maximum entropy <entropy (at) zippy.bernstein.com>, December 5, 1997. 35 * 36 * This driver was written from scratch, but I referred to several other 37 * drivers in the NetBSD distribution as examples. The file I referred to 38 * the most was /sys/arch/atari/vme/if_le_vme.c. Due credits: 39 * Copyright (c) 1997 Leo Weppelman. All rights reserved. 40 * Copyright (c) 1995 Charles M. Hannum. All rights reserved. 41 * Copyright (c) 1992, 1993 42 * The Regents of the University of California. All rights reserved. 43 * This code is derived from software contributed to Berkeley by 44 * Ralph Campbell and Rick Macklem. 45 * This product includes software developed by the University of 46 * California, Berkeley and its contributors. 47 */ 48 49 #include <sys/cdefs.h> 50 __KERNEL_RCSID(0, "$NetBSD: leo.c,v 1.13 2008/06/13 08:50:12 cegger Exp $"); 51 52 #include <sys/param.h> 53 #include <sys/systm.h> 54 #include <sys/proc.h> 55 #include <sys/errno.h> 56 #include <sys/device.h> 57 #include <sys/conf.h> 58 #include <sys/ioctl.h> 59 #include <machine/cpu.h> 60 #include <machine/bus.h> 61 #include <machine/iomap.h> 62 #include <machine/scu.h> 63 #include <atari/vme/vmevar.h> 64 #include <atari/vme/leovar.h> 65 #include <atari/vme/leoioctl.h> 66 67 static struct leo_addresses { 68 u_long reg_addr; 69 u_int reg_size; 70 u_long mem_addr; 71 u_int mem_size; 72 } leostd[] = { 73 { 0xfed90000, 0x100, 0xfec00000, 0x100000 } 74 }; 75 76 #define NLEOSTD (sizeof(leostd) / sizeof(leostd[0])) 77 78 struct leo_softc { 79 struct device sc_dev; /* XXX what goes here? */ 80 bus_space_tag_t sc_iot; 81 bus_space_tag_t sc_memt; 82 bus_space_handle_t sc_ioh; 83 bus_space_handle_t sc_memh; 84 int sc_flags; 85 int sc_maddr; 86 u_int sc_msize; 87 }; 88 89 #define LEO_SC_FLAGS_INUSE 1 90 91 static int leo_match __P((struct device *, struct cfdata *, void *)); 92 static void leo_attach __P((struct device *, struct device *, void *)); 93 static int leo_probe __P((bus_space_tag_t *, bus_space_tag_t *, 94 bus_space_handle_t *, bus_space_handle_t *, 95 u_int, u_int)); 96 static int leo_init __P((struct leo_softc *, int)); 97 static int leo_scroll __P((struct leo_softc *, int)); 98 99 CFATTACH_DECL(leo, sizeof(struct leo_softc), 100 leo_match, leo_attach, NULL, NULL); 101 102 extern struct cfdriver leo_cd; 103 104 dev_type_open(leoopen); 105 dev_type_close(leoclose); 106 dev_type_read(leomove); 107 dev_type_ioctl(leoioctl); 108 dev_type_mmap(leommap); 109 110 const struct cdevsw leo_cdevsw = { 111 leoopen, leoclose, leomove, leomove, leoioctl, 112 nostop, notty, nopoll, leommap, nokqfilter, 113 }; 114 115 static int 116 leo_match(parent, cfp, aux) 117 struct device *parent; 118 struct cfdata *cfp; 119 void *aux; 120 { 121 struct vme_attach_args *va = aux; 122 int i; 123 bus_space_tag_t iot; 124 bus_space_tag_t memt; 125 bus_space_handle_t ioh; 126 bus_space_handle_t memh; 127 128 /* 129 * We are passed our configuration in the attachment arguments. 130 * The configuration information may be partially unspecified. 131 * For any unspecified configuration parameters, we fill in those 132 * parameters with data for a "standard" configuration. 133 * Once we have a fully specified configuration, we try to probe 134 * a card with that configuration. 135 * The Leonardo only has one configuration and it isn't likely 136 * to change, but this routine doesn't assume that's the case. 137 */ 138 iot = va->va_iot; 139 memt = va->va_memt; 140 for (i = 0; i < NLEOSTD; i++) { 141 struct leo_addresses *leo_ap = &leostd[i]; 142 int found = 0; 143 struct vme_attach_args vat = *va; 144 145 if (vat.va_irq != VMECF_IRQ_DEFAULT) { 146 printf("leo_match: config error: no irq support\n"); 147 return 0; 148 } 149 if (vat.va_iobase == VMECF_IOPORT_DEFAULT) 150 vat.va_iobase = leo_ap->reg_addr; 151 if (vat.va_maddr == VMECF_MEM_DEFAULT) 152 vat.va_maddr = leo_ap->mem_addr; 153 if (vat.va_iosize == VMECF_IOSIZE_DEFAULT) 154 vat.va_iosize = leo_ap->reg_size; 155 if (vat.va_msize == VMECF_MEMSIZ_DEFAULT) 156 vat.va_msize = leo_ap->mem_size; 157 if (bus_space_map(iot, vat.va_iobase, vat.va_iosize, 0, &ioh)) { 158 printf("leo_match: cannot map io area\n"); 159 return 0; 160 } 161 if (bus_space_map(memt, vat.va_maddr, vat.va_msize, 162 BUS_SPACE_MAP_LINEAR|BUS_SPACE_MAP_CACHEABLE, 163 &memh)) { 164 bus_space_unmap(iot, ioh, vat.va_iosize); 165 printf("leo_match: cannot map memory area\n"); 166 return 0; 167 } 168 found = leo_probe(&iot, &memt, &ioh, &memh, 169 vat.va_iosize, vat.va_msize); 170 bus_space_unmap(iot, ioh, vat.va_iosize); 171 bus_space_unmap(memt, memh, vat.va_msize); 172 if (found) { 173 *va = vat; 174 return 1; 175 } 176 } 177 return 0; 178 } 179 180 static int 181 leo_probe(iot, memt, ioh, memh, iosize, msize) 182 bus_space_tag_t *iot, *memt; 183 bus_space_handle_t *ioh, *memh; 184 u_int iosize, msize; 185 { 186 187 /* Test that our highest register is within the io range. */ 188 if (0xca > iosize) /* XXX */ 189 return 0; 190 /* Test if we can peek each register. */ 191 if (!bus_space_peek_1(*iot, *ioh, LEO_REG_MSBSCROLL)) 192 return 0; 193 if (!bus_space_peek_1(*iot, *ioh, LEO_REG_LSBSCROLL)) 194 return 0; 195 /* 196 * Write a test pattern at the start and end of the memory region, 197 * and test if the pattern can be read back. If so, the region is 198 * backed by memory (i.e. the card is present). 199 * On the Leonardo, the first byte of each longword isn't backed by 200 * physical memory, so we only compare the three low-order bytes 201 * with the test pattern. 202 */ 203 bus_space_write_4(*memt, *memh, 0, 0xa5a5a5a5); 204 if ((bus_space_read_4(*memt, *memh, 0) & 0xffffff) != 0xa5a5a5) 205 return 0; 206 bus_space_write_4(*memt, *memh, msize - 4, 0xa5a5a5a5); 207 if ((bus_space_read_4(*memt, *memh, msize - 4) & 0xffffff) 208 != 0xa5a5a5) 209 return 0; 210 return 1; 211 } 212 213 static void 214 leo_attach(parent, self, aux) 215 struct device *parent, *self; 216 void *aux; 217 { 218 struct leo_softc *sc = (struct leo_softc *)self; 219 struct vme_attach_args *va = aux; 220 bus_space_handle_t ioh; 221 bus_space_handle_t memh; 222 #ifndef SET_REGION 223 int i; 224 #endif 225 226 printf("\n"); 227 if (bus_space_map(va->va_iot, va->va_iobase, va->va_iosize, 0, &ioh)) 228 panic("leo_attach: cannot map io area"); 229 if (bus_space_map(va->va_memt, va->va_maddr, va->va_msize, 230 BUS_SPACE_MAP_LINEAR|BUS_SPACE_MAP_CACHEABLE, &memh)) 231 panic("leo_attach: cannot map memory area"); 232 #ifdef SET_REGION /* XXX seems to be unimplemented on atari? */ 233 bus_space_set_region_4(va->va_memt, memh, 0, 0, va->va_msize >> 2); 234 #else 235 for (i = 0; i < (va->va_msize >> 2); i++) 236 bus_space_write_4(va->va_memt, memh, i << 2, 0); 237 #endif 238 sc->sc_iot = va->va_iot; 239 sc->sc_ioh = ioh; 240 sc->sc_memt = va->va_memt; 241 sc->sc_memh = memh; 242 sc->sc_flags = 0; 243 sc->sc_maddr = va->va_maddr; 244 sc->sc_msize = va->va_msize; 245 leo_init(sc, 512); 246 leo_scroll(sc, 0); 247 } 248 249 int 250 leoopen(dev_t dev, int flags, int devtype, struct proc *p) 251 { 252 struct leo_softc *sc; 253 int r; 254 255 sc = device_lookup_private(&leo_cd, minor(dev)); 256 if (!sc) 257 return ENXIO; 258 if (sc->sc_flags & LEO_SC_FLAGS_INUSE) 259 return EBUSY; 260 r = leo_init(sc, 512); 261 if (r != 0) 262 return r; 263 r = leo_scroll(sc, 0); 264 if (r != 0) 265 return r; 266 sc->sc_flags |= LEO_SC_FLAGS_INUSE; 267 return 0; 268 } 269 270 static int 271 leo_init(sc, ysize) 272 struct leo_softc *sc; 273 int ysize; 274 { 275 276 if ((ysize != 256) && (ysize != 384) && (ysize != 512)) 277 return EINVAL; 278 /* XXX */ 279 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x00, 0x6); 280 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x08, 0x0); 281 if (ysize == 384) 282 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x10, 0x10); 283 else 284 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x10, 0x11); 285 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x18, 0x0); 286 if (ysize == 384) 287 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x20, 0x50); 288 else 289 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x20, 0x51); 290 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x28, 0x0); 291 if (ysize == 384) 292 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x30, 0x56); 293 else 294 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x30, 0x57); 295 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x38, 0x0); 296 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x40, 0x6); 297 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x48, 0x0); 298 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x50, 0x25); 299 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x58, 0x0); 300 if (ysize == 256) { 301 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x60, 0x1f); 302 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x68, 0x1); 303 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x70, 0x29); 304 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x78, 0x1); 305 } else if (ysize == 384) { 306 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x60, 0xa5); 307 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x68, 0x1); 308 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x70, 0xa7); 309 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x78, 0x1); 310 } else { 311 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x60, 0x1d); 312 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x68, 0x2); 313 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x70, 0x27); 314 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x78, 0x2); 315 } 316 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xb8, 0x10); 317 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xb0, 0x10); 318 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x80, 0x4); 319 if (ysize == 384) 320 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xc8, 0x21); 321 else 322 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xc8, 0x20); 323 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xc0, 0x40); 324 return 0; 325 } 326 327 static int 328 leo_scroll(sc, scroll) 329 struct leo_softc *sc; 330 int scroll; 331 { 332 333 if ((scroll < 0) || (scroll > 255)) 334 return EINVAL; 335 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LEO_REG_MSBSCROLL, 336 (scroll >> 6) && 0xff); 337 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LEO_REG_LSBSCROLL, 338 (scroll << 2) && 0xff); 339 return 0; 340 } 341 342 int 343 leoclose(dev_t dev, int flags, int devtype, struct proc *p) 344 { 345 struct leo_softc *sc; 346 347 sc = device_lookup_private(&leo_cd, minor(dev)); 348 sc->sc_flags &= ~LEO_SC_FLAGS_INUSE; 349 return 0; 350 } 351 352 #define SMALLBSIZE 32 353 354 int 355 leomove(dev_t dev, struct uio *uio, int flags) 356 { 357 struct leo_softc *sc; 358 int length, size, error; 359 u_int8_t smallbuf[SMALLBSIZE]; 360 off_t offset; 361 362 sc = device_lookup_private(&leo_cd,minor(dev)); 363 if (uio->uio_offset > sc->sc_msize) 364 return 0; 365 length = sc->sc_msize - uio->uio_offset; 366 if (length > uio->uio_resid) 367 length = uio->uio_resid; 368 while (length > 0) { 369 size = length; 370 if (size > SMALLBSIZE) 371 size = SMALLBSIZE; 372 length -= size; 373 offset = uio->uio_offset; 374 if (uio->uio_rw == UIO_READ) 375 bus_space_read_region_1(sc->sc_memt, sc->sc_memh, 376 offset, smallbuf, size); 377 if ((error = uiomove((void *)smallbuf, size, uio))) 378 return (error); 379 if (uio->uio_rw == UIO_WRITE) 380 bus_space_write_region_1(sc->sc_memt, sc->sc_memh, 381 offset, smallbuf, size); 382 } 383 return 0; 384 } 385 386 int 387 leoioctl(dev_t dev, u_long cmd, void *data, int flags, struct proc *p) 388 { 389 struct leo_softc *sc; 390 391 sc = device_lookup_private(&leo_cd,minor(dev)); 392 switch (cmd) { 393 case LIOCYRES: 394 return leo_init(sc, *(int *)data); 395 break; 396 case LIOCSCRL: 397 return leo_scroll(sc, *(int *)data); 398 break; 399 default: 400 return EINVAL; 401 break; 402 } 403 } 404 405 paddr_t 406 leommap(dev_t dev, off_t offset, int prot) 407 { 408 struct leo_softc *sc; 409 410 sc = device_lookup_private(&leo_cd, minor(dev)); 411 if (offset >= 0 && offset < sc->sc_msize) 412 return m68k_btop(sc->sc_maddr + offset); 413 return -1; 414 } 415
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