am79c930.c revision 1.5
1 /* $NetBSD: am79c930.c,v 1.5 2000/03/23 13:57:58 onoe Exp $ */ 2 3 /*- 4 * Copyright (c) 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Bill Sommerfeld 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Am79c930 chip driver. 41 * 42 * This is used by the awi driver to use the shared 43 * memory attached to the 79c930 to communicate with the firmware running 44 * in the 930's on-board 80188 core. 45 * 46 * The 79c930 can be mapped into just I/O space, or also have a 47 * memory mapping; the mapping must be set up by the bus front-end 48 * before am79c930_init is called. 49 */ 50 51 /* 52 * operations: 53 * 54 * read_8, read_16, read_32, read_64, read_bytes 55 * write_8, write_16, write_32, write_64, write_bytes 56 * (two versions, depending on whether memory-space or i/o space is in use). 57 * 58 * interrupt E.C. 59 * start isr 60 * end isr 61 */ 62 63 #include <sys/param.h> 64 #include <sys/systm.h> 65 #include <sys/kernel.h> 66 #ifndef __FreeBSD__ 67 #include <sys/device.h> 68 #endif 69 70 #include <machine/cpu.h> 71 #ifdef __FreeBSD__ 72 #include <machine/bus_pio.h> 73 #include <machine/bus_memio.h> 74 #endif 75 #include <machine/bus.h> 76 #ifdef __NetBSD__ 77 #include <machine/intr.h> 78 #endif 79 80 #ifdef __NetBSD__ 81 #include <dev/ic/am79c930reg.h> 82 #include <dev/ic/am79c930var.h> 83 #endif 84 #ifdef __FreeBSD__ 85 #include <dev/awi/am79c930reg.h> 86 #include <dev/awi/am79c930var.h> 87 #endif 88 89 #define AM930_DELAY(x) /*nothing*/ 90 91 void am79c930_regdump __P((struct am79c930_softc *sc)); 92 93 static void io_write_1 __P((struct am79c930_softc *, u_int32_t, u_int8_t)); 94 static void io_write_2 __P((struct am79c930_softc *, u_int32_t, u_int16_t)); 95 static void io_write_4 __P((struct am79c930_softc *, u_int32_t, u_int32_t)); 96 static void io_write_bytes __P((struct am79c930_softc *, u_int32_t, u_int8_t *, size_t)); 97 98 static u_int8_t io_read_1 __P((struct am79c930_softc *, u_int32_t)); 99 static u_int16_t io_read_2 __P((struct am79c930_softc *, u_int32_t)); 100 static u_int32_t io_read_4 __P((struct am79c930_softc *, u_int32_t)); 101 static void io_read_bytes __P((struct am79c930_softc *, u_int32_t, u_int8_t *, size_t)); 102 103 static void mem_write_1 __P((struct am79c930_softc *, u_int32_t, u_int8_t)); 104 static void mem_write_2 __P((struct am79c930_softc *, u_int32_t, u_int16_t)); 105 static void mem_write_4 __P((struct am79c930_softc *, u_int32_t, u_int32_t)); 106 static void mem_write_bytes __P((struct am79c930_softc *, u_int32_t, u_int8_t *, size_t)); 107 108 static u_int8_t mem_read_1 __P((struct am79c930_softc *, u_int32_t)); 109 static u_int16_t mem_read_2 __P((struct am79c930_softc *, u_int32_t)); 110 static u_int32_t mem_read_4 __P((struct am79c930_softc *, u_int32_t)); 111 static void mem_read_bytes __P((struct am79c930_softc *, u_int32_t, u_int8_t *, size_t)); 112 113 static struct am79c930_ops iospace_ops = { 114 io_write_1, 115 io_write_2, 116 io_write_4, 117 io_write_bytes, 118 io_read_1, 119 io_read_2, 120 io_read_4, 121 io_read_bytes 122 }; 123 124 struct am79c930_ops memspace_ops = { 125 mem_write_1, 126 mem_write_2, 127 mem_write_4, 128 mem_write_bytes, 129 mem_read_1, 130 mem_read_2, 131 mem_read_4, 132 mem_read_bytes 133 }; 134 135 static void io_write_1 (sc, off, val) 136 struct am79c930_softc *sc; 137 u_int32_t off; 138 u_int8_t val; 139 { 140 AM930_DELAY(1); 141 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI, 142 ((off>>8)& 0x7f)); 143 AM930_DELAY(1); 144 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff)); 145 AM930_DELAY(1); 146 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA, val); 147 AM930_DELAY(1); 148 } 149 150 static void io_write_2 (sc, off, val) 151 struct am79c930_softc *sc; 152 u_int32_t off; 153 u_int16_t val; 154 { 155 AM930_DELAY(1); 156 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI, 157 ((off>>8)& 0x7f)); 158 AM930_DELAY(1); 159 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_LMA_LO, (off&0xff)); 160 AM930_DELAY(1); 161 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA, val & 0xff); 162 AM930_DELAY(1); 163 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA, (val>>8)&0xff); 164 AM930_DELAY(1); 165 } 166 167 static void io_write_4 (sc, off, val) 168 struct am79c930_softc *sc; 169 u_int32_t off; 170 u_int32_t val; 171 { 172 AM930_DELAY(1); 173 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI, 174 ((off>>8)& 0x7f)); 175 AM930_DELAY(1); 176 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_LMA_LO, (off&0xff)); 177 AM930_DELAY(1); 178 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,val & 0xff); 179 AM930_DELAY(1); 180 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,(val>>8)&0xff); 181 AM930_DELAY(1); 182 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,(val>>16)&0xff); 183 AM930_DELAY(1); 184 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,(val>>24)&0xff); 185 AM930_DELAY(1); 186 } 187 188 static void io_write_bytes (sc, off, ptr, len) 189 struct am79c930_softc *sc; 190 u_int32_t off; 191 u_int8_t *ptr; 192 size_t len; 193 { 194 int i; 195 196 AM930_DELAY(1); 197 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI, 198 ((off>>8)& 0x7f)); 199 AM930_DELAY(1); 200 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_LMA_LO, (off&0xff)); 201 AM930_DELAY(1); 202 for (i=0; i<len; i++) 203 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,ptr[i]); 204 } 205 206 static u_int8_t io_read_1 (sc, off) 207 struct am79c930_softc *sc; 208 u_int32_t off; 209 { 210 u_int8_t val; 211 212 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI, 213 ((off>>8)& 0x7f)); 214 AM930_DELAY(1); 215 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff)); 216 AM930_DELAY(1); 217 val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA); 218 AM930_DELAY(1); 219 return val; 220 } 221 222 static u_int16_t io_read_2 (sc, off) 223 struct am79c930_softc *sc; 224 u_int32_t off; 225 { 226 u_int16_t val; 227 228 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI, 229 ((off>>8)& 0x7f)); 230 AM930_DELAY(1); 231 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff)); 232 AM930_DELAY(1); 233 val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA); 234 AM930_DELAY(1); 235 val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 8; 236 AM930_DELAY(1); 237 return val; 238 } 239 240 static u_int32_t io_read_4 (sc, off) 241 struct am79c930_softc *sc; 242 u_int32_t off; 243 { 244 u_int32_t val; 245 246 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI, 247 ((off>>8)& 0x7f)); 248 AM930_DELAY(1); 249 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff)); 250 AM930_DELAY(1); 251 val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA); 252 AM930_DELAY(1); 253 val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 8; 254 AM930_DELAY(1); 255 val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 16; 256 AM930_DELAY(1); 257 val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 24; 258 AM930_DELAY(1); 259 return val; 260 } 261 262 static void io_read_bytes (sc, off, ptr, len) 263 struct am79c930_softc *sc; 264 u_int32_t off; 265 u_int8_t *ptr; 266 size_t len; 267 { 268 int i; 269 270 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI, 271 ((off>>8)& 0x7f)); 272 AM930_DELAY(1); 273 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff)); 274 AM930_DELAY(1); 275 for (i=0; i<len; i++) 276 ptr[i] = bus_space_read_1(sc->sc_iot, sc->sc_ioh, 277 AM79C930_IODPA); 278 } 279 280 static void mem_write_1 (sc, off, val) 281 struct am79c930_softc *sc; 282 u_int32_t off; 283 u_int8_t val; 284 { 285 bus_space_write_1(sc->sc_memt, sc->sc_memh, off, val); 286 } 287 288 static void mem_write_2 (sc, off, val) 289 struct am79c930_softc *sc; 290 u_int32_t off; 291 u_int16_t val; 292 { 293 bus_space_tag_t t = sc->sc_memt; 294 bus_space_handle_t h = sc->sc_memh; 295 296 /* could be unaligned */ 297 if ((off & 0x1) == 0) 298 bus_space_write_2(t, h, off, val); 299 else { 300 bus_space_write_1(t, h, off, val & 0xff); 301 bus_space_write_1(t, h, off+1, (val >> 8) & 0xff); 302 } 303 } 304 305 static void mem_write_4 (sc, off, val) 306 struct am79c930_softc *sc; 307 u_int32_t off; 308 u_int32_t val; 309 { 310 bus_space_tag_t t = sc->sc_memt; 311 bus_space_handle_t h = sc->sc_memh; 312 313 /* could be unaligned */ 314 if ((off & 0x3) == 0) 315 bus_space_write_4(t, h, off, val); 316 else { 317 bus_space_write_1(t, h, off, val & 0xff); 318 bus_space_write_1(t, h, off+1, (val >> 8) & 0xff); 319 bus_space_write_1(t, h, off+2, (val >> 16) & 0xff); 320 bus_space_write_1(t, h, off+3, (val >> 24) & 0xff); 321 } 322 } 323 324 static void mem_write_bytes (sc, off, ptr, len) 325 struct am79c930_softc *sc; 326 u_int32_t off; 327 u_int8_t *ptr; 328 size_t len; 329 { 330 bus_space_write_region_1 (sc->sc_memt, sc->sc_memh, off, ptr, len); 331 } 332 333 334 static u_int8_t mem_read_1 (sc, off) 335 struct am79c930_softc *sc; 336 u_int32_t off; 337 { 338 return bus_space_read_1(sc->sc_memt, sc->sc_memh, off); 339 } 340 341 static u_int16_t mem_read_2 (sc, off) 342 struct am79c930_softc *sc; 343 u_int32_t off; 344 { 345 /* could be unaligned */ 346 if ((off & 0x1) == 0) 347 return bus_space_read_2(sc->sc_memt, sc->sc_memh, off); 348 else 349 return 350 bus_space_read_1(sc->sc_memt, sc->sc_memh, off ) | 351 (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+1) << 8); 352 } 353 354 static u_int32_t mem_read_4 (sc, off) 355 struct am79c930_softc *sc; 356 u_int32_t off; 357 { 358 /* could be unaligned */ 359 if ((off & 0x3) == 0) 360 return bus_space_read_4(sc->sc_memt, sc->sc_memh, off); 361 else 362 return 363 bus_space_read_1(sc->sc_memt, sc->sc_memh, off ) | 364 (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+1) << 8) | 365 (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+2) <<16) | 366 (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+3) <<24); 367 } 368 369 370 371 static void mem_read_bytes (sc, off, ptr, len) 372 struct am79c930_softc *sc; 373 u_int32_t off; 374 u_int8_t *ptr; 375 size_t len; 376 { 377 bus_space_read_region_1 (sc->sc_memt, sc->sc_memh, off, ptr, len); 378 } 379 380 381 382 383 /* 384 * Set bits in GCR. 385 */ 386 387 void am79c930_gcr_setbits (sc, bits) 388 struct am79c930_softc *sc; 389 u_int8_t bits; 390 { 391 u_int8_t gcr = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR); 392 393 gcr |= bits; 394 395 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_GCR, gcr); 396 } 397 398 /* 399 * Clear bits in GCR. 400 */ 401 402 void am79c930_gcr_clearbits (sc, bits) 403 struct am79c930_softc *sc; 404 u_int8_t bits; 405 { 406 u_int8_t gcr = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR); 407 408 gcr &= ~bits; 409 410 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_GCR, gcr); 411 } 412 413 u_int8_t am79c930_gcr_read (sc) 414 struct am79c930_softc *sc; 415 { 416 return bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR); 417 } 418 419 #if 0 420 void am79c930_regdump (sc) 421 struct am79c930_softc *sc; 422 { 423 u_int8_t buf[8]; 424 int i; 425 426 AM930_DELAY(5); 427 for (i=0; i<8; i++) { 428 buf[i] = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, i); 429 AM930_DELAY(5); 430 } 431 printf("am79c930: regdump:"); 432 for (i=0; i<8; i++) { 433 printf(" %02x", buf[i]); 434 } 435 printf("\n"); 436 } 437 #endif 438 439 void am79c930_chip_init (sc, how) 440 struct am79c930_softc *sc; 441 { 442 /* zero the bank select register, and leave it that way.. */ 443 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_BSS, 0); 444 if (how) 445 sc->sc_ops = &memspace_ops; 446 else 447 sc->sc_ops = &iospace_ops; 448 } 449 450 451
Indexes created Tue Sep 23 14:10:03 GMT 2025