leo.c revision 1.19
1 /* $NetBSD: leo.c,v 1.19 2011/07/01 20:34:06 dyoung 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 1.19 2011/07/01 20:34:06 dyoung 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 leoopen, leoclose, leomove, leomove, leoioctl, 112 nostop, notty, nopoll, leommap, nokqfilter, 113 }; 114 115 static int 116 leo_match(device_t parent, cfdata_t cf, void *aux) 117 { 118 struct vme_attach_args *va = aux; 119 int i; 120 bus_space_tag_t iot; 121 bus_space_tag_t memt; 122 bus_space_handle_t ioh; 123 bus_space_handle_t memh; 124 125 /* 126 * We are passed our configuration in the attachment arguments. 127 * The configuration information may be partially unspecified. 128 * For any unspecified configuration parameters, we fill in those 129 * parameters with data for a "standard" configuration. 130 * Once we have a fully specified configuration, we try to probe 131 * a card with that configuration. 132 * The Leonardo only has one configuration and it isn't likely 133 * to change, but this routine doesn't assume that's the case. 134 */ 135 iot = va->va_iot; 136 memt = va->va_memt; 137 for (i = 0; i < NLEOSTD; i++) { 138 struct leo_addresses *leo_ap = &leostd[i]; 139 int found = 0; 140 struct vme_attach_args vat = *va; 141 142 if (vat.va_irq != VMECF_IRQ_DEFAULT) { 143 printf("leo_match: config error: no irq support\n"); 144 return 0; 145 } 146 if (vat.va_iobase == VMECF_IOPORT_DEFAULT) 147 vat.va_iobase = leo_ap->reg_addr; 148 if (vat.va_maddr == VMECF_MEM_DEFAULT) 149 vat.va_maddr = leo_ap->mem_addr; 150 if (vat.va_iosize == VMECF_IOSIZE_DEFAULT) 151 vat.va_iosize = leo_ap->reg_size; 152 if (vat.va_msize == VMECF_MEMSIZ_DEFAULT) 153 vat.va_msize = leo_ap->mem_size; 154 if (bus_space_map(iot, vat.va_iobase, vat.va_iosize, 0, &ioh)) { 155 printf("leo_match: cannot map io area\n"); 156 return 0; 157 } 158 if (bus_space_map(memt, vat.va_maddr, vat.va_msize, 159 BUS_SPACE_MAP_LINEAR|BUS_SPACE_MAP_CACHEABLE, 160 &memh)) { 161 bus_space_unmap(iot, ioh, vat.va_iosize); 162 printf("leo_match: cannot map memory area\n"); 163 return 0; 164 } 165 found = leo_probe(&iot, &memt, &ioh, &memh, 166 vat.va_iosize, vat.va_msize); 167 bus_space_unmap(iot, ioh, vat.va_iosize); 168 bus_space_unmap(memt, memh, vat.va_msize); 169 if (found) { 170 *va = vat; 171 return 1; 172 } 173 } 174 return 0; 175 } 176 177 static int 178 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) 179 { 180 181 /* Test that our highest register is within the io range. */ 182 if (0xca > iosize) /* XXX */ 183 return 0; 184 /* Test if we can peek each register. */ 185 if (!bus_space_peek_1(*iot, *ioh, LEO_REG_MSBSCROLL)) 186 return 0; 187 if (!bus_space_peek_1(*iot, *ioh, LEO_REG_LSBSCROLL)) 188 return 0; 189 /* 190 * Write a test pattern at the start and end of the memory region, 191 * and test if the pattern can be read back. If so, the region is 192 * backed by memory (i.e. the card is present). 193 * On the Leonardo, the first byte of each longword isn't backed by 194 * physical memory, so we only compare the three low-order bytes 195 * with the test pattern. 196 */ 197 bus_space_write_4(*memt, *memh, 0, 0xa5a5a5a5); 198 if ((bus_space_read_4(*memt, *memh, 0) & 0xffffff) != 0xa5a5a5) 199 return 0; 200 bus_space_write_4(*memt, *memh, msize - 4, 0xa5a5a5a5); 201 if ((bus_space_read_4(*memt, *memh, msize - 4) & 0xffffff) 202 != 0xa5a5a5) 203 return 0; 204 return 1; 205 } 206 207 static void 208 leo_attach(device_t parent, device_t self, void *aux) 209 { 210 struct leo_softc *sc = device_private(self); 211 struct vme_attach_args *va = aux; 212 bus_space_handle_t ioh; 213 bus_space_handle_t memh; 214 #ifndef SET_REGION 215 int i; 216 #endif 217 218 sc->sc_dev = self; 219 220 printf("\n"); 221 if (bus_space_map(va->va_iot, va->va_iobase, va->va_iosize, 0, &ioh)) 222 panic("leo_attach: cannot map io area"); 223 if (bus_space_map(va->va_memt, va->va_maddr, va->va_msize, 224 BUS_SPACE_MAP_LINEAR|BUS_SPACE_MAP_CACHEABLE, &memh)) 225 panic("leo_attach: cannot map memory area"); 226 #ifdef SET_REGION /* XXX seems to be unimplemented on atari? */ 227 bus_space_set_region_4(va->va_memt, memh, 0, 0, va->va_msize >> 2); 228 #else 229 for (i = 0; i < (va->va_msize >> 2); i++) 230 bus_space_write_4(va->va_memt, memh, i << 2, 0); 231 #endif 232 sc->sc_iot = va->va_iot; 233 sc->sc_ioh = ioh; 234 sc->sc_memt = va->va_memt; 235 sc->sc_memh = memh; 236 sc->sc_flags = 0; 237 sc->sc_maddr = va->va_maddr; 238 sc->sc_msize = va->va_msize; 239 leo_init(sc, 512); 240 leo_scroll(sc, 0); 241 } 242 243 int 244 leoopen(dev_t dev, int flags, int devtype, struct lwp *l) 245 { 246 struct leo_softc *sc; 247 int r; 248 249 sc = device_lookup_private(&leo_cd, minor(dev)); 250 if (!sc) 251 return ENXIO; 252 if (sc->sc_flags & LEO_SC_FLAGS_INUSE) 253 return EBUSY; 254 r = leo_init(sc, 512); 255 if (r != 0) 256 return r; 257 r = leo_scroll(sc, 0); 258 if (r != 0) 259 return r; 260 sc->sc_flags |= LEO_SC_FLAGS_INUSE; 261 return 0; 262 } 263 264 static int 265 leo_init(struct leo_softc *sc, int ysize) 266 { 267 268 if ((ysize != 256) && (ysize != 384) && (ysize != 512)) 269 return EINVAL; 270 /* XXX */ 271 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x00, 0x6); 272 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x08, 0x0); 273 if (ysize == 384) 274 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x10, 0x10); 275 else 276 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x10, 0x11); 277 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x18, 0x0); 278 if (ysize == 384) 279 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x20, 0x50); 280 else 281 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x20, 0x51); 282 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x28, 0x0); 283 if (ysize == 384) 284 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x30, 0x56); 285 else 286 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x30, 0x57); 287 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x38, 0x0); 288 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x40, 0x6); 289 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x48, 0x0); 290 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x50, 0x25); 291 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x58, 0x0); 292 if (ysize == 256) { 293 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x60, 0x1f); 294 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x68, 0x1); 295 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x70, 0x29); 296 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x78, 0x1); 297 } else if (ysize == 384) { 298 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x60, 0xa5); 299 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x68, 0x1); 300 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x70, 0xa7); 301 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x78, 0x1); 302 } else { 303 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x60, 0x1d); 304 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x68, 0x2); 305 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x70, 0x27); 306 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x78, 0x2); 307 } 308 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xb8, 0x10); 309 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xb0, 0x10); 310 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0x80, 0x4); 311 if (ysize == 384) 312 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xc8, 0x21); 313 else 314 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xc8, 0x20); 315 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0xc0, 0x40); 316 return 0; 317 } 318 319 static int 320 leo_scroll(struct leo_softc *sc, int scroll) 321 { 322 323 if ((scroll < 0) || (scroll > 255)) 324 return EINVAL; 325 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LEO_REG_MSBSCROLL, 326 (scroll >> 6) && 0xff); 327 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LEO_REG_LSBSCROLL, 328 (scroll << 2) && 0xff); 329 return 0; 330 } 331 332 int 333 leoclose(dev_t dev, int flags, int devtype, struct lwp *l) 334 { 335 struct leo_softc *sc; 336 337 sc = device_lookup_private(&leo_cd, minor(dev)); 338 sc->sc_flags &= ~LEO_SC_FLAGS_INUSE; 339 return 0; 340 } 341 342 #define SMALLBSIZE 32 343 344 int 345 leomove(dev_t dev, struct uio *uio, int flags) 346 { 347 struct leo_softc *sc; 348 int length, size, error; 349 u_int8_t smallbuf[SMALLBSIZE]; 350 off_t offset; 351 352 sc = device_lookup_private(&leo_cd,minor(dev)); 353 if (uio->uio_offset > sc->sc_msize) 354 return 0; 355 length = sc->sc_msize - uio->uio_offset; 356 if (length > uio->uio_resid) 357 length = uio->uio_resid; 358 while (length > 0) { 359 size = length; 360 if (size > SMALLBSIZE) 361 size = SMALLBSIZE; 362 length -= size; 363 offset = uio->uio_offset; 364 if (uio->uio_rw == UIO_READ) 365 bus_space_read_region_1(sc->sc_memt, sc->sc_memh, 366 offset, smallbuf, size); 367 if ((error = uiomove((void *)smallbuf, size, uio))) 368 return (error); 369 if (uio->uio_rw == UIO_WRITE) 370 bus_space_write_region_1(sc->sc_memt, sc->sc_memh, 371 offset, smallbuf, size); 372 } 373 return 0; 374 } 375 376 int 377 leoioctl(dev_t dev, u_long cmd, void *data, int flags, struct lwp *l) 378 { 379 struct leo_softc *sc; 380 381 sc = device_lookup_private(&leo_cd,minor(dev)); 382 switch (cmd) { 383 case LIOCYRES: 384 return leo_init(sc, *(int *)data); 385 break; 386 case LIOCSCRL: 387 return leo_scroll(sc, *(int *)data); 388 break; 389 default: 390 return EINVAL; 391 break; 392 } 393 } 394 395 paddr_t 396 leommap(dev_t dev, off_t offset, int prot) 397 { 398 struct leo_softc *sc; 399 400 sc = device_lookup_private(&leo_cd, minor(dev)); 401 if (offset >= 0 && offset < sc->sc_msize) 402 return m68k_btop(sc->sc_maddr + offset); 403 return -1; 404 } 405
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