leo.c revision 1.20
1 /* $NetBSD: leo.c,v 1.20 2014/03/16 05:20:23 dholland 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 1.20 2014/03/16 05:20:23 dholland 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 <sys/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 #include "ioconf.h" 68 69 static struct leo_addresses { 70 u_long reg_addr; 71 u_int reg_size; 72 u_long mem_addr; 73 u_int mem_size; 74 } leostd[] = { 75 { 0xfed90000, 0x100, 0xfec00000, 0x100000 } 76 }; 77 78 #define NLEOSTD (sizeof(leostd) / sizeof(leostd[0])) 79 80 struct leo_softc { 81 device_t sc_dev; /* XXX what goes here? */ 82 bus_space_tag_t sc_iot; 83 bus_space_tag_t sc_memt; 84 bus_space_handle_t sc_ioh; 85 bus_space_handle_t sc_memh; 86 int sc_flags; 87 int sc_maddr; 88 u_int sc_msize; 89 }; 90 91 #define LEO_SC_FLAGS_INUSE 1 92 93 static int leo_match(device_t, cfdata_t, void *); 94 static void leo_attach(device_t, device_t, void *); 95 static int leo_probe(bus_space_tag_t *, bus_space_tag_t *, 96 bus_space_handle_t *, bus_space_handle_t *, 97 u_int, u_int); 98 static int leo_init(struct leo_softc *, int); 99 static int leo_scroll(struct leo_softc *, int); 100 101 CFATTACH_DECL_NEW(leo, sizeof(struct leo_softc), 102 leo_match, leo_attach, NULL, NULL); 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 .d_open = leoopen, 112 .d_close = leoclose, 113 .d_read = leomove, 114 .d_write = leomove, 115 .d_ioctl = leoioctl, 116 .d_stop = nostop, 117 .d_tty = notty, 118 .d_poll = nopoll, 119 .d_mmap = leommap, 120 .d_kqfilter = nokqfilter, 121 .d_flag = 0 122 }; 123 124 static int 125 leo_match(device_t parent, cfdata_t cf, void *aux) 126 { 127 struct vme_attach_args *va = aux; 128 int i; 129 bus_space_tag_t iot; 130 bus_space_tag_t memt; 131 bus_space_handle_t ioh; 132 bus_space_handle_t memh; 133 134 /* 135 * We are passed our configuration in the attachment arguments. 136 * The configuration information may be partially unspecified. 137 * For any unspecified configuration parameters, we fill in those 138 * parameters with data for a "standard" configuration. 139 * Once we have a fully specified configuration, we try to probe 140 * a card with that configuration. 141 * The Leonardo only has one configuration and it isn't likely 142 * to change, but this routine doesn't assume that's the case. 143 */ 144 iot = va->va_iot; 145 memt = va->va_memt; 146 for (i = 0; i < NLEOSTD; i++) { 147 struct leo_addresses *leo_ap = &leostd[i]; 148 int found = 0; 149 struct vme_attach_args vat = *va; 150 151 if (vat.va_irq != VMECF_IRQ_DEFAULT) { 152 printf("leo_match: config error: no irq support\n"); 153 return 0; 154 } 155 if (vat.va_iobase == VMECF_IOPORT_DEFAULT) 156 vat.va_iobase = leo_ap->reg_addr; 157 if (vat.va_maddr == VMECF_MEM_DEFAULT) 158 vat.va_maddr = leo_ap->mem_addr; 159 if (vat.va_iosize == VMECF_IOSIZE_DEFAULT) 160 vat.va_iosize = leo_ap->reg_size; 161 if (vat.va_msize == VMECF_MEMSIZ_DEFAULT) 162 vat.va_msize = leo_ap->mem_size; 163 if (bus_space_map(iot, vat.va_iobase, vat.va_iosize, 0, &ioh)) { 164 printf("leo_match: cannot map io area\n"); 165 return 0; 166 } 167 if (bus_space_map(memt, vat.va_maddr, vat.va_msize, 168 BUS_SPACE_MAP_LINEAR|BUS_SPACE_MAP_CACHEABLE, 169 &memh)) { 170 bus_space_unmap(iot, ioh, vat.va_iosize); 171 printf("leo_match: cannot map memory area\n"); 172 return 0; 173 } 174 found = leo_probe(&iot, &memt, &ioh, &memh, 175 vat.va_iosize, vat.va_msize); 176 bus_space_unmap(iot, ioh, vat.va_iosize); 177 bus_space_unmap(memt, memh, vat.va_msize); 178 if (found) { 179 *va = vat; 180 return 1; 181 } 182 } 183 return 0; 184 } 185 186 static int 187 leo_probe(bus_space_tag_t *iot, bus_space_tag_t *memt, bus_space_handle_t *ioh, bus_space_handle_t *memh, u_int iosize, u_int msize) 188 { 189 190 /* Test that our highest register is within the io range. */ 191 if (0xca > iosize) /* XXX */ 192 return 0; 193 /* Test if we can peek each register. */ 194 if (!bus_space_peek_1(*iot, *ioh, LEO_REG_MSBSCROLL)) 195 return 0; 196 if (!bus_space_peek_1(*iot, *ioh, LEO_REG_LSBSCROLL)) 197 return 0; 198 /* 199 * Write a test pattern at the start and end of the memory region, 200 * and test if the pattern can be read back. If so, the region is 201 * backed by memory (i.e. the card is present). 202 * On the Leonardo, the first byte of each longword isn't backed by 203 * physical memory, so we only compare the three low-order bytes 204 * with the test pattern. 205 */ 206 bus_space_write_4(*memt, *memh, 0, 0xa5a5a5a5); 207 if ((bus_space_read_4(*memt, *memh, 0) & 0xffffff) != 0xa5a5a5) 208 return 0; 209 bus_space_write_4(*memt, *memh, msize - 4, 0xa5a5a5a5); 210 if ((bus_space_read_4(*memt, *memh, msize - 4) & 0xffffff) 211 != 0xa5a5a5) 212 return 0; 213 return 1; 214 } 215 216 static void 217 leo_attach(device_t parent, device_t self, void *aux) 218 { 219 struct leo_softc *sc = device_private(self); 220 struct vme_attach_args *va = aux; 221 bus_space_handle_t ioh; 222 bus_space_handle_t memh; 223 #ifndef SET_REGION 224 int i; 225 #endif 226 227 sc->sc_dev = self; 228 229 printf("\n"); 230 if (bus_space_map(va->va_iot, va->va_iobase, va->va_iosize, 0, &ioh)) 231 panic("leo_attach: cannot map io area"); 232 if (bus_space_map(va->va_memt, va->va_maddr, va->va_msize, 233 BUS_SPACE_MAP_LINEAR|BUS_SPACE_MAP_CACHEABLE, &memh)) 234 panic("leo_attach: cannot map memory area"); 235 #ifdef SET_REGION /* XXX seems to be unimplemented on atari? */ 236 bus_space_set_region_4(va->va_memt, memh, 0, 0, va->va_msize >> 2); 237 #else 238 for (i = 0; i < (va->va_msize >> 2); i++) 239 bus_space_write_4(va->va_memt, memh, i << 2, 0); 240 #endif 241 sc->sc_iot = va->va_iot; 242 sc->sc_ioh = ioh; 243 sc->sc_memt = va->va_memt; 244 sc->sc_memh = memh; 245 sc->sc_flags = 0; 246 sc->sc_maddr = va->va_maddr; 247 sc->sc_msize = va->va_msize; 248 leo_init(sc, 512); 249 leo_scroll(sc, 0); 250 } 251 252 int 253 leoopen(dev_t dev, int flags, int devtype, struct lwp *l) 254 { 255 struct leo_softc *sc; 256 int r; 257 258 sc = device_lookup_private(&leo_cd, minor(dev)); 259 if (!sc) 260 return ENXIO; 261 if (sc->sc_flags & LEO_SC_FLAGS_INUSE) 262 return EBUSY; 263 r = leo_init(sc, 512); 264 if (r != 0) 265 return r; 266 r = leo_scroll(sc, 0); 267 if (r != 0) 268 return r; 269 sc->sc_flags |= LEO_SC_FLAGS_INUSE; 270 return 0; 271 } 272 273 static int 274 leo_init(struct leo_softc *sc, int ysize) 275 { 276 277 if ((ysize != 256) && (ysize != 384) && (ysize != 512)) 278 return EINVAL; 279 /* XXX */ 280 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x00, 0x6); 281 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x08, 0x0); 282 if (ysize == 384) 283 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x10, 0x10); 284 else 285 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x10, 0x11); 286 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x18, 0x0); 287 if (ysize == 384) 288 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x20, 0x50); 289 else 290 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x20, 0x51); 291 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x28, 0x0); 292 if (ysize == 384) 293 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x30, 0x56); 294 else 295 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x30, 0x57); 296 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x38, 0x0); 297 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x40, 0x6); 298 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x48, 0x0); 299 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x50, 0x25); 300 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x58, 0x0); 301 if (ysize == 256) { 302 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x60, 0x1f); 303 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x68, 0x1); 304 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x70, 0x29); 305 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x78, 0x1); 306 } else if (ysize == 384) { 307 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x60, 0xa5); 308 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x68, 0x1); 309 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x70, 0xa7); 310 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x78, 0x1); 311 } else { 312 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x60, 0x1d); 313 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x68, 0x2); 314 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x70, 0x27); 315 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x78, 0x2); 316 } 317 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xb8, 0x10); 318 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xb0, 0x10); 319 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x80, 0x4); 320 if (ysize == 384) 321 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xc8, 0x21); 322 else 323 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xc8, 0x20); 324 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xc0, 0x40); 325 return 0; 326 } 327 328 static int 329 leo_scroll(struct leo_softc *sc, int scroll) 330 { 331 332 if ((scroll < 0) || (scroll > 255)) 333 return EINVAL; 334 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LEO_REG_MSBSCROLL, 335 (scroll >> 6) && 0xff); 336 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LEO_REG_LSBSCROLL, 337 (scroll << 2) && 0xff); 338 return 0; 339 } 340 341 int 342 leoclose(dev_t dev, int flags, int devtype, struct lwp *l) 343 { 344 struct leo_softc *sc; 345 346 sc = device_lookup_private(&leo_cd, minor(dev)); 347 sc->sc_flags &= ~LEO_SC_FLAGS_INUSE; 348 return 0; 349 } 350 351 #define SMALLBSIZE 32 352 353 int 354 leomove(dev_t dev, struct uio *uio, int flags) 355 { 356 struct leo_softc *sc; 357 int length, size, error; 358 u_int8_t smallbuf[SMALLBSIZE]; 359 off_t offset; 360 361 sc = device_lookup_private(&leo_cd,minor(dev)); 362 if (uio->uio_offset > sc->sc_msize) 363 return 0; 364 length = sc->sc_msize - uio->uio_offset; 365 if (length > uio->uio_resid) 366 length = uio->uio_resid; 367 while (length > 0) { 368 size = length; 369 if (size > SMALLBSIZE) 370 size = SMALLBSIZE; 371 length -= size; 372 offset = uio->uio_offset; 373 if (uio->uio_rw == UIO_READ) 374 bus_space_read_region_1(sc->sc_memt, sc->sc_memh, 375 offset, smallbuf, size); 376 if ((error = uiomove((void *)smallbuf, size, uio))) 377 return (error); 378 if (uio->uio_rw == UIO_WRITE) 379 bus_space_write_region_1(sc->sc_memt, sc->sc_memh, 380 offset, smallbuf, size); 381 } 382 return 0; 383 } 384 385 int 386 leoioctl(dev_t dev, u_long cmd, void *data, int flags, struct lwp *l) 387 { 388 struct leo_softc *sc; 389 390 sc = device_lookup_private(&leo_cd,minor(dev)); 391 switch (cmd) { 392 case LIOCYRES: 393 return leo_init(sc, *(int *)data); 394 break; 395 case LIOCSCRL: 396 return leo_scroll(sc, *(int *)data); 397 break; 398 default: 399 return EINVAL; 400 break; 401 } 402 } 403 404 paddr_t 405 leommap(dev_t dev, off_t offset, int prot) 406 { 407 struct leo_softc *sc; 408 409 sc = device_lookup_private(&leo_cd, minor(dev)); 410 if (offset >= 0 && offset < sc->sc_msize) 411 return m68k_btop(sc->sc_maddr + offset); 412 return -1; 413 } 414
Indexes created Tue Sep 30 20:09:53 GMT 2025