am79c930.c revision 1.3
1 /* $NetBSD: am79c930.c,v 1.3 2000/02/17 17:37:23 sommerfeld 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 #include <sys/device.h> 67 68 #include <machine/cpu.h> 69 #include <machine/bus.h> 70 #include <machine/intr.h> 71 72 #include <dev/ic/am79c930reg.h> 73 #include <dev/ic/am79c930var.h> 74 75 #define AM930_DELAY(x) /*nothing*/; 76 77 void am79c930_regdump __P((struct am79c930_softc *sc)); 78 79 static void io_write_1 __P((struct am79c930_softc *, u_int32_t, u_int8_t)); 80 static void io_write_2 __P((struct am79c930_softc *, u_int32_t, u_int16_t)); 81 static void io_write_4 __P((struct am79c930_softc *, u_int32_t, u_int32_t)); 82 static void io_write_bytes __P((struct am79c930_softc *, u_int32_t, u_int8_t *, size_t)); 83 84 static u_int8_t io_read_1 __P((struct am79c930_softc *, u_int32_t)); 85 static u_int16_t io_read_2 __P((struct am79c930_softc *, u_int32_t)); 86 static u_int32_t io_read_4 __P((struct am79c930_softc *, u_int32_t)); 87 static void io_read_bytes __P((struct am79c930_softc *, u_int32_t, u_int8_t *, size_t)); 88 89 static void mem_write_1 __P((struct am79c930_softc *, u_int32_t, u_int8_t)); 90 static void mem_write_2 __P((struct am79c930_softc *, u_int32_t, u_int16_t)); 91 static void mem_write_4 __P((struct am79c930_softc *, u_int32_t, u_int32_t)); 92 static void mem_write_bytes __P((struct am79c930_softc *, u_int32_t, u_int8_t *, size_t)); 93 94 static u_int8_t mem_read_1 __P((struct am79c930_softc *, u_int32_t)); 95 static u_int16_t mem_read_2 __P((struct am79c930_softc *, u_int32_t)); 96 static u_int32_t mem_read_4 __P((struct am79c930_softc *, u_int32_t)); 97 static void mem_read_bytes __P((struct am79c930_softc *, u_int32_t, u_int8_t *, size_t)); 98 99 static struct am79c930_ops iospace_ops = { 100 io_write_1, 101 io_write_2, 102 io_write_4, 103 io_write_bytes, 104 io_read_1, 105 io_read_2, 106 io_read_4, 107 io_read_bytes 108 }; 109 110 struct am79c930_ops memspace_ops = { 111 mem_write_1, 112 mem_write_2, 113 mem_write_4, 114 mem_write_bytes, 115 mem_read_1, 116 mem_read_2, 117 mem_read_4, 118 mem_read_bytes 119 }; 120 121 static void io_write_1 (sc, off, val) 122 struct am79c930_softc *sc; 123 u_int32_t off; 124 u_int8_t val; 125 { 126 AM930_DELAY(1); 127 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI, 128 ((off>>8)& 0x7f)); 129 AM930_DELAY(1); 130 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff)); 131 AM930_DELAY(1); 132 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA, val); 133 AM930_DELAY(1); 134 } 135 136 static void io_write_2 (sc, off, val) 137 struct am79c930_softc *sc; 138 u_int32_t off; 139 u_int16_t val; 140 { 141 AM930_DELAY(1); 142 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI, 143 ((off>>8)& 0x7f)); 144 AM930_DELAY(1); 145 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_LMA_LO, (off&0xff)); 146 AM930_DELAY(1); 147 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA, val & 0xff); 148 AM930_DELAY(1); 149 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA, (val>>8)&0xff); 150 AM930_DELAY(1); 151 } 152 153 static void io_write_4 (sc, off, val) 154 struct am79c930_softc *sc; 155 u_int32_t off; 156 u_int32_t val; 157 { 158 AM930_DELAY(1); 159 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI, 160 ((off>>8)& 0x7f)); 161 AM930_DELAY(1); 162 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_LMA_LO, (off&0xff)); 163 AM930_DELAY(1); 164 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,val & 0xff); 165 AM930_DELAY(1); 166 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,(val>>8)&0xff); 167 AM930_DELAY(1); 168 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,(val>>16)&0xff); 169 AM930_DELAY(1); 170 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,(val>>24)&0xff); 171 AM930_DELAY(1); 172 } 173 174 static void io_write_bytes (sc, off, ptr, len) 175 struct am79c930_softc *sc; 176 u_int32_t off; 177 u_int8_t *ptr; 178 size_t len; 179 { 180 int i; 181 182 AM930_DELAY(1); 183 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI, 184 ((off>>8)& 0x7f)); 185 AM930_DELAY(1); 186 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_LMA_LO, (off&0xff)); 187 AM930_DELAY(1); 188 for (i=0; i<len; i++) 189 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,ptr[i]); 190 } 191 192 static u_int8_t io_read_1 (sc, off) 193 struct am79c930_softc *sc; 194 u_int32_t off; 195 { 196 u_int8_t val; 197 198 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI, 199 ((off>>8)& 0x7f)); 200 AM930_DELAY(1); 201 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff)); 202 AM930_DELAY(1); 203 val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA); 204 AM930_DELAY(1); 205 return val; 206 } 207 208 static u_int16_t io_read_2 (sc, off) 209 struct am79c930_softc *sc; 210 u_int32_t off; 211 { 212 u_int16_t val; 213 214 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI, 215 ((off>>8)& 0x7f)); 216 AM930_DELAY(1); 217 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff)); 218 AM930_DELAY(1); 219 val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA); 220 AM930_DELAY(1); 221 val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 8; 222 AM930_DELAY(1); 223 return val; 224 } 225 226 static u_int32_t io_read_4 (sc, off) 227 struct am79c930_softc *sc; 228 u_int32_t off; 229 { 230 u_int32_t val; 231 232 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI, 233 ((off>>8)& 0x7f)); 234 AM930_DELAY(1); 235 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff)); 236 AM930_DELAY(1); 237 val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA); 238 AM930_DELAY(1); 239 val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 8; 240 AM930_DELAY(1); 241 val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 16; 242 AM930_DELAY(1); 243 val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 24; 244 AM930_DELAY(1); 245 return val; 246 } 247 248 static void io_read_bytes (sc, off, ptr, len) 249 struct am79c930_softc *sc; 250 u_int32_t off; 251 u_int8_t *ptr; 252 size_t len; 253 { 254 int i; 255 256 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI, 257 ((off>>8)& 0x7f)); 258 AM930_DELAY(1); 259 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff)); 260 AM930_DELAY(1); 261 for (i=0; i<len; i++) 262 ptr[i] = bus_space_read_1(sc->sc_iot, sc->sc_ioh, 263 AM79C930_IODPA); 264 } 265 266 static void mem_write_1 (sc, off, val) 267 struct am79c930_softc *sc; 268 u_int32_t off; 269 u_int8_t val; 270 { 271 bus_space_write_1(sc->sc_memt, sc->sc_memh, off, val); 272 } 273 274 static void mem_write_2 (sc, off, val) 275 struct am79c930_softc *sc; 276 u_int32_t off; 277 u_int16_t val; 278 { 279 bus_space_write_2(sc->sc_memt, sc->sc_memh, off, val); 280 } 281 282 static void mem_write_4 (sc, off, val) 283 struct am79c930_softc *sc; 284 u_int32_t off; 285 u_int32_t val; 286 { 287 bus_space_write_4(sc->sc_memt, sc->sc_memh, off, val); 288 } 289 290 static void mem_write_bytes (sc, off, ptr, len) 291 struct am79c930_softc *sc; 292 u_int32_t off; 293 u_int8_t *ptr; 294 size_t len; 295 { 296 bus_space_write_region_1 (sc->sc_memt, sc->sc_memh, off, ptr, len); 297 } 298 299 300 static u_int8_t mem_read_1 (sc, off) 301 struct am79c930_softc *sc; 302 u_int32_t off; 303 { 304 return bus_space_read_1(sc->sc_memt, sc->sc_memh, off); 305 } 306 307 static u_int16_t mem_read_2 (sc, off) 308 struct am79c930_softc *sc; 309 u_int32_t off; 310 { 311 return bus_space_read_2(sc->sc_memt, sc->sc_memh, off); 312 } 313 314 static u_int32_t mem_read_4 (sc, off) 315 struct am79c930_softc *sc; 316 u_int32_t off; 317 { 318 return bus_space_read_4(sc->sc_memt, sc->sc_memh, off); 319 } 320 321 322 323 static void mem_read_bytes (sc, off, ptr, len) 324 struct am79c930_softc *sc; 325 u_int32_t off; 326 u_int8_t *ptr; 327 size_t len; 328 { 329 bus_space_read_region_1 (sc->sc_memt, sc->sc_memh, off, ptr, len); 330 } 331 332 333 334 335 /* 336 * Set bits in GCR. 337 */ 338 339 void am79c930_gcr_setbits (sc, bits) 340 struct am79c930_softc *sc; 341 u_int8_t bits; 342 { 343 u_int8_t gcr = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR); 344 345 gcr |= bits; 346 347 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_GCR, gcr); 348 } 349 350 /* 351 * Clear bits in GCR. 352 */ 353 354 void am79c930_gcr_clearbits (sc, bits) 355 struct am79c930_softc *sc; 356 u_int8_t bits; 357 { 358 u_int8_t gcr = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR); 359 360 gcr &= ~bits; 361 362 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_GCR, gcr); 363 } 364 365 u_int8_t am79c930_gcr_read (sc) 366 struct am79c930_softc *sc; 367 { 368 return bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR); 369 } 370 371 #if 0 372 void am79c930_regdump (sc) 373 struct am79c930_softc *sc; 374 { 375 u_int8_t buf[8]; 376 int i; 377 378 AM930_DELAY(5); 379 for (i=0; i<8; i++) { 380 buf[i] = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, i); 381 AM930_DELAY(5); 382 } 383 printf("am79c930: regdump:"); 384 for (i=0; i<8; i++) { 385 printf(" %02x", buf[i]); 386 } 387 printf("\n"); 388 } 389 #endif 390 391 void am79c930_chip_init (sc, how) 392 struct am79c930_softc *sc; 393 { 394 /* zero the bank select register, and leave it that way.. */ 395 bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_BSS, 0); 396 if (how) 397 sc->sc_ops = &memspace_ops; 398 else 399 sc->sc_ops = &iospace_ops; 400 } 401 402 403
Indexes created Wed Sep 24 02:09:48 GMT 2025