Annotation of sys/dev/ic/am79c930.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: am79c930.c,v 1.4 2002/03/14 01:26:54 millert Exp $ */
! 2: /* $NetBSD: am79c930.c,v 1.5 2000/03/23 13:57:58 onoe Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1999 The NetBSD Foundation, Inc.
! 6: * All rights reserved.
! 7: *
! 8: * This code is derived from software contributed to The NetBSD Foundation
! 9: * by Bill Sommerfeld
! 10: *
! 11: * Redistribution and use in source and binary forms, with or without
! 12: * modification, are permitted provided that the following conditions
! 13: * are met:
! 14: * 1. Redistributions of source code must retain the above copyright
! 15: * notice, this list of conditions and the following disclaimer.
! 16: * 2. Redistributions in binary form must reproduce the above copyright
! 17: * notice, this list of conditions and the following disclaimer in the
! 18: * documentation and/or other materials provided with the distribution.
! 19: * 3. All advertising materials mentioning features or use of this software
! 20: * must display the following acknowledgement:
! 21: * This product includes software developed by the NetBSD
! 22: * Foundation, Inc. and its contributors.
! 23: * 4. Neither the name of The NetBSD Foundation nor the names of its
! 24: * contributors may be used to endorse or promote products derived
! 25: * from this software without specific prior written permission.
! 26: *
! 27: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
! 28: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 29: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 30: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
! 31: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 32: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 33: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 34: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 35: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 36: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 37: * POSSIBILITY OF SUCH DAMAGE.
! 38: */
! 39:
! 40: /*
! 41: * Am79c930 chip driver.
! 42: *
! 43: * This is used by the awi driver to use the shared
! 44: * memory attached to the 79c930 to communicate with the firmware running
! 45: * in the 930's on-board 80188 core.
! 46: *
! 47: * The 79c930 can be mapped into just I/O space, or also have a
! 48: * memory mapping; the mapping must be set up by the bus front-end
! 49: * before am79c930_init is called.
! 50: */
! 51:
! 52: /*
! 53: * operations:
! 54: *
! 55: * read_8, read_16, read_32, read_64, read_bytes
! 56: * write_8, write_16, write_32, write_64, write_bytes
! 57: * (two versions, depending on whether memory-space or i/o space is in use).
! 58: *
! 59: * interrupt E.C.
! 60: * start isr
! 61: * end isr
! 62: */
! 63:
! 64: #include <sys/param.h>
! 65: #include <sys/systm.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: #if defined(__NetBSD__) || defined(__OpenBSD__)
! 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(struct am79c930_softc *sc);
! 92:
! 93: static void io_write_1(struct am79c930_softc *, u_int32_t, u_int8_t);
! 94: static void io_write_2(struct am79c930_softc *, u_int32_t, u_int16_t);
! 95: static void io_write_4(struct am79c930_softc *, u_int32_t, u_int32_t);
! 96: static void io_write_bytes(struct am79c930_softc *, u_int32_t, u_int8_t *, size_t);
! 97:
! 98: static u_int8_t io_read_1(struct am79c930_softc *, u_int32_t);
! 99: static u_int16_t io_read_2(struct am79c930_softc *, u_int32_t);
! 100: static u_int32_t io_read_4(struct am79c930_softc *, u_int32_t);
! 101: static void io_read_bytes(struct am79c930_softc *, u_int32_t, u_int8_t *, size_t);
! 102:
! 103: static void mem_write_1(struct am79c930_softc *, u_int32_t, u_int8_t);
! 104: static void mem_write_2(struct am79c930_softc *, u_int32_t, u_int16_t);
! 105: static void mem_write_4(struct am79c930_softc *, u_int32_t, u_int32_t);
! 106: static void mem_write_bytes(struct am79c930_softc *, u_int32_t, u_int8_t *, size_t);
! 107:
! 108: static u_int8_t mem_read_1(struct am79c930_softc *, u_int32_t);
! 109: static u_int16_t mem_read_2(struct am79c930_softc *, u_int32_t);
! 110: static u_int32_t mem_read_4(struct am79c930_softc *, u_int32_t);
! 111: static void mem_read_bytes(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:
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