| 1 | /* $NetBSD: am79c930.c,v 1.16 2008/04/28 20:23:49 martin 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 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 29 | * POSSIBILITY OF SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | /* |
| 33 | * Am79c930 chip driver. |
| 34 | * |
| 35 | * This is used by the awi driver to use the shared |
| 36 | * memory attached to the 79c930 to communicate with the firmware running |
| 37 | * in the 930's on-board 80188 core. |
| 38 | * |
| 39 | * The 79c930 can be mapped into just I/O space, or also have a |
| 40 | * memory mapping; the mapping must be set up by the bus front-end |
| 41 | * before am79c930_init is called. |
| 42 | */ |
| 43 | |
| 44 | /* |
| 45 | * operations: |
| 46 | * |
| 47 | * read_8, read_16, read_32, read_64, read_bytes |
| 48 | * write_8, write_16, write_32, write_64, write_bytes |
| 49 | * (two versions, depending on whether memory-space or i/o space is in use). |
| 50 | * |
| 51 | * interrupt E.C. |
| 52 | * start isr |
| 53 | * end isr |
| 54 | */ |
| 55 | |
| 56 | #include <sys/cdefs.h> |
| 57 | #ifdef __NetBSD__ |
| 58 | __KERNEL_RCSID(0, "$NetBSD: am79c930.c,v 1.16 2008/04/28 20:23:49 martin Exp $" ); |
| 59 | #endif |
| 60 | #ifdef __FreeBSD__ |
| 61 | __FBSDID("$FreeBSD$" ); |
| 62 | #endif |
| 63 | |
| 64 | #include <sys/param.h> |
| 65 | #include <sys/systm.h> |
| 66 | #include <sys/endian.h> |
| 67 | #ifndef __FreeBSD__ |
| 68 | #include <sys/device.h> |
| 69 | #endif |
| 70 | |
| 71 | #include <sys/cpu.h> |
| 72 | #ifdef __FreeBSD__ |
| 73 | #include <machine/bus_pio.h> |
| 74 | #include <machine/bus_memio.h> |
| 75 | #endif |
| 76 | #include <sys/bus.h> |
| 77 | #ifdef __NetBSD__ |
| 78 | #include <sys/intr.h> |
| 79 | #endif |
| 80 | |
| 81 | #ifdef __NetBSD__ |
| 82 | #include <dev/ic/am79c930reg.h> |
| 83 | #include <dev/ic/am79c930var.h> |
| 84 | #endif |
| 85 | #ifdef __FreeBSD__ |
| 86 | #include <dev/awi/am79c930reg.h> |
| 87 | #include <dev/awi/am79c930var.h> |
| 88 | #endif |
| 89 | |
| 90 | #define AM930_DELAY(x) /*nothing*/ |
| 91 | |
| 92 | #ifndef __BUS_SPACE_HAS_STREAM_METHODS |
| 93 | #define bus_space_read_stream_2 bus_space_read_2 |
| 94 | #define bus_space_read_stream_4 bus_space_read_4 |
| 95 | #define bus_space_write_stream_2 bus_space_write_2 |
| 96 | #define bus_space_write_stream_4 bus_space_write_4 |
| 97 | #endif /* __BUS_SPACE_HAS_STREAM_METHODS */ |
| 98 | |
| 99 | void am79c930_regdump(struct am79c930_softc *sc); |
| 100 | |
| 101 | static void io_write_1(struct am79c930_softc *, u_int32_t, u_int8_t); |
| 102 | static void io_write_2(struct am79c930_softc *, u_int32_t, u_int16_t); |
| 103 | static void io_write_4(struct am79c930_softc *, u_int32_t, u_int32_t); |
| 104 | static void io_write_bytes(struct am79c930_softc *, u_int32_t, u_int8_t *, size_t); |
| 105 | |
| 106 | static u_int8_t io_read_1(struct am79c930_softc *, u_int32_t); |
| 107 | static u_int16_t io_read_2(struct am79c930_softc *, u_int32_t); |
| 108 | static u_int32_t io_read_4(struct am79c930_softc *, u_int32_t); |
| 109 | static void io_read_bytes(struct am79c930_softc *, u_int32_t, u_int8_t *, size_t); |
| 110 | |
| 111 | static void mem_write_1(struct am79c930_softc *, u_int32_t, u_int8_t); |
| 112 | static void mem_write_2(struct am79c930_softc *, u_int32_t, u_int16_t); |
| 113 | static void mem_write_4(struct am79c930_softc *, u_int32_t, u_int32_t); |
| 114 | static void mem_write_bytes(struct am79c930_softc *, u_int32_t, u_int8_t *, size_t); |
| 115 | |
| 116 | static u_int8_t mem_read_1(struct am79c930_softc *, u_int32_t); |
| 117 | static u_int16_t mem_read_2(struct am79c930_softc *, u_int32_t); |
| 118 | static u_int32_t mem_read_4(struct am79c930_softc *, u_int32_t); |
| 119 | static void mem_read_bytes(struct am79c930_softc *, u_int32_t, u_int8_t *, size_t); |
| 120 | |
| 121 | static struct am79c930_ops iospace_ops = { |
| 122 | io_write_1, |
| 123 | io_write_2, |
| 124 | io_write_4, |
| 125 | io_write_bytes, |
| 126 | io_read_1, |
| 127 | io_read_2, |
| 128 | io_read_4, |
| 129 | io_read_bytes |
| 130 | }; |
| 131 | |
| 132 | struct am79c930_ops memspace_ops = { |
| 133 | mem_write_1, |
| 134 | mem_write_2, |
| 135 | mem_write_4, |
| 136 | mem_write_bytes, |
| 137 | mem_read_1, |
| 138 | mem_read_2, |
| 139 | mem_read_4, |
| 140 | mem_read_bytes |
| 141 | }; |
| 142 | |
| 143 | static void |
| 144 | io_write_1( struct am79c930_softc *sc, u_int32_t off, u_int8_t val) |
| 145 | { |
| 146 | AM930_DELAY(1); |
| 147 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI, |
| 148 | ((off>>8)& 0x7f)); |
| 149 | AM930_DELAY(1); |
| 150 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff)); |
| 151 | AM930_DELAY(1); |
| 152 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA, val); |
| 153 | AM930_DELAY(1); |
| 154 | } |
| 155 | |
| 156 | static void |
| 157 | io_write_2(struct am79c930_softc *sc, u_int32_t off, u_int16_t val) |
| 158 | { |
| 159 | AM930_DELAY(1); |
| 160 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI, |
| 161 | ((off>>8)& 0x7f)); |
| 162 | AM930_DELAY(1); |
| 163 | bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_LMA_LO, (off&0xff)); |
| 164 | AM930_DELAY(1); |
| 165 | bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA, val & 0xff); |
| 166 | AM930_DELAY(1); |
| 167 | bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA, (val>>8)&0xff); |
| 168 | AM930_DELAY(1); |
| 169 | } |
| 170 | |
| 171 | static void |
| 172 | io_write_4(struct am79c930_softc *sc, u_int32_t off, u_int32_t val) |
| 173 | { |
| 174 | AM930_DELAY(1); |
| 175 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI, |
| 176 | ((off>>8)& 0x7f)); |
| 177 | AM930_DELAY(1); |
| 178 | bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_LMA_LO, (off&0xff)); |
| 179 | AM930_DELAY(1); |
| 180 | bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,val & 0xff); |
| 181 | AM930_DELAY(1); |
| 182 | bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,(val>>8)&0xff); |
| 183 | AM930_DELAY(1); |
| 184 | bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,(val>>16)&0xff); |
| 185 | AM930_DELAY(1); |
| 186 | bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,(val>>24)&0xff); |
| 187 | AM930_DELAY(1); |
| 188 | } |
| 189 | |
| 190 | static void |
| 191 | io_write_bytes(struct am79c930_softc *sc, u_int32_t off, 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 |
| 207 | io_read_1(struct am79c930_softc *sc, u_int32_t off) |
| 208 | { |
| 209 | u_int8_t val; |
| 210 | |
| 211 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI, |
| 212 | ((off>>8)& 0x7f)); |
| 213 | AM930_DELAY(1); |
| 214 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff)); |
| 215 | AM930_DELAY(1); |
| 216 | val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA); |
| 217 | AM930_DELAY(1); |
| 218 | return val; |
| 219 | } |
| 220 | |
| 221 | static u_int16_t |
| 222 | io_read_2(struct am79c930_softc *sc, u_int32_t off) |
| 223 | { |
| 224 | u_int16_t val; |
| 225 | |
| 226 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI, |
| 227 | ((off>>8)& 0x7f)); |
| 228 | AM930_DELAY(1); |
| 229 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff)); |
| 230 | AM930_DELAY(1); |
| 231 | val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA); |
| 232 | AM930_DELAY(1); |
| 233 | val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 8; |
| 234 | AM930_DELAY(1); |
| 235 | return val; |
| 236 | } |
| 237 | |
| 238 | static u_int32_t |
| 239 | io_read_4(struct am79c930_softc *sc, u_int32_t off) |
| 240 | { |
| 241 | u_int32_t val; |
| 242 | |
| 243 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI, |
| 244 | ((off>>8)& 0x7f)); |
| 245 | AM930_DELAY(1); |
| 246 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff)); |
| 247 | AM930_DELAY(1); |
| 248 | val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA); |
| 249 | AM930_DELAY(1); |
| 250 | val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 8; |
| 251 | AM930_DELAY(1); |
| 252 | val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 16; |
| 253 | AM930_DELAY(1); |
| 254 | val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 24; |
| 255 | AM930_DELAY(1); |
| 256 | return val; |
| 257 | } |
| 258 | |
| 259 | static void |
| 260 | io_read_bytes(struct am79c930_softc *sc, u_int32_t off, u_int8_t *ptr, |
| 261 | size_t len) |
| 262 | { |
| 263 | int i; |
| 264 | |
| 265 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI, |
| 266 | ((off>>8)& 0x7f)); |
| 267 | AM930_DELAY(1); |
| 268 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff)); |
| 269 | AM930_DELAY(1); |
| 270 | for (i=0; i<len; i++) |
| 271 | ptr[i] = bus_space_read_1(sc->sc_iot, sc->sc_ioh, |
| 272 | AM79C930_IODPA); |
| 273 | } |
| 274 | |
| 275 | static void |
| 276 | mem_write_1(struct am79c930_softc *sc, u_int32_t off, u_int8_t val) |
| 277 | { |
| 278 | bus_space_write_1(sc->sc_memt, sc->sc_memh, off, val); |
| 279 | } |
| 280 | |
| 281 | static void |
| 282 | mem_write_2(struct am79c930_softc *sc, u_int32_t off, u_int16_t val) |
| 283 | { |
| 284 | bus_space_tag_t t = sc->sc_memt; |
| 285 | bus_space_handle_t h = sc->sc_memh; |
| 286 | |
| 287 | /* could be unaligned */ |
| 288 | if ((off & 0x1) == 0) |
| 289 | bus_space_write_stream_2(t, h, off, htole16(val)); |
| 290 | else { |
| 291 | bus_space_write_1(t, h, off, val & 0xff); |
| 292 | bus_space_write_1(t, h, off+1, (val >> 8) & 0xff); |
| 293 | } |
| 294 | } |
| 295 | |
| 296 | static void |
| 297 | mem_write_4(struct am79c930_softc *sc, u_int32_t off, u_int32_t val) |
| 298 | { |
| 299 | bus_space_tag_t t = sc->sc_memt; |
| 300 | bus_space_handle_t h = sc->sc_memh; |
| 301 | |
| 302 | /* could be unaligned */ |
| 303 | if ((off & 0x3) == 0) |
| 304 | bus_space_write_stream_4(t, h, off, htole32(val)); |
| 305 | else { |
| 306 | bus_space_write_1(t, h, off, val & 0xff); |
| 307 | bus_space_write_1(t, h, off+1, (val >> 8) & 0xff); |
| 308 | bus_space_write_1(t, h, off+2, (val >> 16) & 0xff); |
| 309 | bus_space_write_1(t, h, off+3, (val >> 24) & 0xff); |
| 310 | } |
| 311 | } |
| 312 | |
| 313 | static void |
| 314 | mem_write_bytes(struct am79c930_softc *sc, u_int32_t off, u_int8_t *ptr, |
| 315 | size_t len) |
| 316 | { |
| 317 | bus_space_write_region_1 (sc->sc_memt, sc->sc_memh, off, ptr, len); |
| 318 | } |
| 319 | |
| 320 | static u_int8_t |
| 321 | mem_read_1(struct am79c930_softc *sc, u_int32_t off) |
| 322 | { |
| 323 | return bus_space_read_1(sc->sc_memt, sc->sc_memh, off); |
| 324 | } |
| 325 | |
| 326 | static u_int16_t |
| 327 | mem_read_2(struct am79c930_softc *sc, u_int32_t off) |
| 328 | { |
| 329 | /* could be unaligned */ |
| 330 | if ((off & 0x1) == 0) |
| 331 | return le16toh(bus_space_read_stream_2(sc->sc_memt, |
| 332 | sc->sc_memh, off)); |
| 333 | else |
| 334 | return |
| 335 | bus_space_read_1(sc->sc_memt, sc->sc_memh, off ) | |
| 336 | (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+1) << 8); |
| 337 | } |
| 338 | |
| 339 | static u_int32_t |
| 340 | mem_read_4(struct am79c930_softc *sc, u_int32_t off) |
| 341 | { |
| 342 | /* could be unaligned */ |
| 343 | if ((off & 0x3) == 0) |
| 344 | return le32toh(bus_space_read_stream_4(sc->sc_memt, sc->sc_memh, |
| 345 | off)); |
| 346 | else |
| 347 | return |
| 348 | bus_space_read_1(sc->sc_memt, sc->sc_memh, off ) | |
| 349 | (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+1) << 8) | |
| 350 | (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+2) <<16) | |
| 351 | (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+3) <<24); |
| 352 | } |
| 353 | |
| 354 | static void |
| 355 | mem_read_bytes(struct am79c930_softc *sc, u_int32_t off, u_int8_t *ptr, |
| 356 | size_t len) |
| 357 | { |
| 358 | bus_space_read_region_1 (sc->sc_memt, sc->sc_memh, off, ptr, len); |
| 359 | } |
| 360 | |
| 361 | |
| 362 | /* |
| 363 | * Set bits in GCR. |
| 364 | */ |
| 365 | |
| 366 | void |
| 367 | am79c930_gcr_setbits(struct am79c930_softc *sc, u_int8_t bits) |
| 368 | { |
| 369 | u_int8_t gcr = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR); |
| 370 | |
| 371 | gcr |= bits; |
| 372 | |
| 373 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_GCR, gcr); |
| 374 | } |
| 375 | |
| 376 | /* |
| 377 | * Clear bits in GCR. |
| 378 | */ |
| 379 | |
| 380 | void |
| 381 | am79c930_gcr_clearbits(struct am79c930_softc *sc, u_int8_t bits) |
| 382 | { |
| 383 | u_int8_t gcr = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR); |
| 384 | |
| 385 | gcr &= ~bits; |
| 386 | |
| 387 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_GCR, gcr); |
| 388 | } |
| 389 | |
| 390 | u_int8_t |
| 391 | am79c930_gcr_read(struct am79c930_softc *sc) |
| 392 | { |
| 393 | return bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR); |
| 394 | } |
| 395 | |
| 396 | #if 0 |
| 397 | void |
| 398 | am79c930_regdump(struct am79c930_softc *sc) |
| 399 | { |
| 400 | u_int8_t buf[8]; |
| 401 | int i; |
| 402 | |
| 403 | AM930_DELAY(5); |
| 404 | for (i=0; i<8; i++) { |
| 405 | buf[i] = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, i); |
| 406 | AM930_DELAY(5); |
| 407 | } |
| 408 | printf("am79c930: regdump:" ); |
| 409 | for (i=0; i<8; i++) { |
| 410 | printf(" %02x" , buf[i]); |
| 411 | } |
| 412 | printf("\n" ); |
| 413 | } |
| 414 | #endif |
| 415 | |
| 416 | void |
| 417 | am79c930_chip_init(struct am79c930_softc *sc, int how) |
| 418 | { |
| 419 | /* zero the bank select register, and leave it that way.. */ |
| 420 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_BSS, 0); |
| 421 | if (how) |
| 422 | sc->sc_ops = &memspace_ops; |
| 423 | else |
| 424 | sc->sc_ops = &iospace_ops; |
| 425 | } |
| 426 | |