Annotation of sys/dev/tc/asc_tc.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: asc_tc.c,v 1.7 2003/02/11 19:20:28 mickey Exp $ */
! 2: /* $NetBSD: asc_tc.c,v 1.19 2001/11/15 09:48:19 lukem Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 2000 The NetBSD Foundation, Inc.
! 6: * All rights reserved.
! 7: *
! 8: * This code is derived from software contributed to The NetBSD Foundation
! 9: * by Tohru Nishimura.
! 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: #include <sys/param.h>
! 41: #include <sys/systm.h>
! 42: #include <sys/device.h>
! 43: #include <sys/buf.h>
! 44:
! 45: #include <scsi/scsi_all.h>
! 46: #include <scsi/scsiconf.h>
! 47: #include <scsi/scsi_message.h>
! 48:
! 49: #include <machine/bus.h>
! 50:
! 51: #include <dev/ic/ncr53c9xreg.h>
! 52: #include <dev/ic/ncr53c9xvar.h>
! 53: #include <dev/tc/ascvar.h>
! 54:
! 55: #include <dev/tc/tcvar.h>
! 56:
! 57: struct asc_tc_softc {
! 58: struct asc_softc asc;
! 59:
! 60: /* XXX XXX XXX */
! 61: caddr_t sc_base, sc_bounce, sc_target;
! 62: };
! 63:
! 64: int asc_tc_match(struct device *, void *, void *);
! 65: void asc_tc_attach(struct device *, struct device *, void *);
! 66:
! 67: struct cfattach asc_tc_ca = {
! 68: sizeof(struct asc_tc_softc), asc_tc_match, asc_tc_attach
! 69: };
! 70:
! 71: extern struct scsi_adapter asc_switch;
! 72: extern struct scsi_device asc_dev;
! 73:
! 74: int asc_dma_isintr(struct ncr53c9x_softc *);
! 75: void asc_tc_reset(struct ncr53c9x_softc *);
! 76: int asc_tc_intr(struct ncr53c9x_softc *);
! 77: int asc_tc_setup(struct ncr53c9x_softc *, caddr_t *,
! 78: size_t *, int, size_t *);
! 79: void asc_tc_go(struct ncr53c9x_softc *);
! 80: void asc_tc_stop(struct ncr53c9x_softc *);
! 81: int asc_dma_isactive(struct ncr53c9x_softc *);
! 82: void asc_clear_latched_intr(struct ncr53c9x_softc *);
! 83:
! 84: struct ncr53c9x_glue asc_tc_glue = {
! 85: asc_read_reg,
! 86: asc_write_reg,
! 87: asc_dma_isintr,
! 88: asc_tc_reset,
! 89: asc_tc_intr,
! 90: asc_tc_setup,
! 91: asc_tc_go,
! 92: asc_tc_stop,
! 93: asc_dma_isactive,
! 94: asc_clear_latched_intr,
! 95: };
! 96:
! 97: /*
! 98: * Parameters specific to PMAZ-A TC option card.
! 99: */
! 100: #define PMAZ_OFFSET_53C94 0x0 /* from module base */
! 101: #define PMAZ_OFFSET_DMAR 0x40000 /* DMA Address Register */
! 102: #define PMAZ_OFFSET_RAM 0x80000 /* 128KB SRAM buffer */
! 103: #define PMAZ_OFFSET_ROM 0xc0000 /* diagnostic ROM */
! 104:
! 105: #define PMAZ_RAM_SIZE 0x20000 /* 128k (32k*32) */
! 106: #define PER_TGT_DMA_SIZE ((PMAZ_RAM_SIZE/7) & ~(sizeof(int)-1))
! 107:
! 108: #define PMAZ_DMAR_WRITE 0x80000000 /* DMA direction bit */
! 109: #define PMAZ_DMAR_MASK 0x1ffff /* 17 bits, 128k */
! 110: #define PMAZ_DMA_ADDR(x) ((unsigned long)(x) & PMAZ_DMAR_MASK)
! 111:
! 112: int
! 113: asc_tc_match(parent, cfdata, aux)
! 114: struct device *parent;
! 115: void *cfdata, *aux;
! 116: {
! 117: struct tc_attach_args *d = aux;
! 118:
! 119: if (strncmp("PMAZ-AA ", d->ta_modname, TC_ROM_LLEN))
! 120: return (0);
! 121:
! 122: return (1);
! 123: }
! 124:
! 125: void
! 126: asc_tc_attach(parent, self, aux)
! 127: struct device *parent, *self;
! 128: void *aux;
! 129: {
! 130: struct tc_attach_args *ta = aux;
! 131: struct asc_tc_softc *asc = (struct asc_tc_softc *)self;
! 132: struct ncr53c9x_softc *sc = &asc->asc.sc_ncr53c9x;
! 133:
! 134: /*
! 135: * Set up glue for MI code early; we use some of it here.
! 136: */
! 137: sc->sc_glue = &asc_tc_glue;
! 138: asc->asc.sc_bst = ta->ta_memt;
! 139: asc->asc.sc_dmat = ta->ta_dmat;
! 140: if (bus_space_map(asc->asc.sc_bst, ta->ta_addr,
! 141: PMAZ_OFFSET_RAM + PMAZ_RAM_SIZE, 0, &asc->asc.sc_bsh)) {
! 142: printf("%s: unable to map device\n", sc->sc_dev.dv_xname);
! 143: return;
! 144: }
! 145: asc->sc_base = (caddr_t)ta->ta_addr; /* XXX XXX XXX */
! 146:
! 147: tc_intr_establish(parent, ta->ta_cookie, IPL_BIO, ncr53c9x_intr, sc);
! 148:
! 149: sc->sc_id = 7;
! 150: sc->sc_freq = (ta->ta_busspeed) ? 25000000 : 12500000;
! 151:
! 152: /* gimme MHz */
! 153: sc->sc_freq /= 1000000;
! 154:
! 155: /*
! 156: * XXX More of this should be in ncr53c9x_attach(), but
! 157: * XXX should we really poke around the chip that much in
! 158: * XXX the MI code? Think about this more...
! 159: */
! 160:
! 161: /*
! 162: * Set up static configuration info.
! 163: */
! 164: sc->sc_cfg1 = sc->sc_id | NCRCFG1_PARENB;
! 165: sc->sc_cfg2 = NCRCFG2_SCSI2;
! 166: sc->sc_cfg3 = 0;
! 167: sc->sc_rev = NCR_VARIANT_NCR53C94;
! 168:
! 169: /*
! 170: * XXX minsync and maxxfer _should_ be set up in MI code,
! 171: * XXX but it appears to have some dependency on what sort
! 172: * XXX of DMA we're hooked up to, etc.
! 173: */
! 174:
! 175: /*
! 176: * This is the value used to start sync negotiations
! 177: * Note that the NCR register "SYNCTP" is programmed
! 178: * in "clocks per byte", and has a minimum value of 4.
! 179: * The SCSI period used in negotiation is one-fourth
! 180: * of the time (in nanoseconds) needed to transfer one byte.
! 181: * Since the chip's clock is given in MHz, we have the following
! 182: * formula: 4 * period = (1000 / freq) * 4
! 183: */
! 184: sc->sc_minsync = (1000 / sc->sc_freq) * 5 / 4;
! 185:
! 186: sc->sc_maxxfer = 64 * 1024;
! 187:
! 188: /* Do the common parts of attachment. */
! 189: ncr53c9x_attach(sc, &asc_switch, &asc_dev);
! 190: }
! 191:
! 192: void
! 193: asc_tc_reset(sc)
! 194: struct ncr53c9x_softc *sc;
! 195: {
! 196: struct asc_tc_softc *asc = (struct asc_tc_softc *)sc;
! 197:
! 198: asc->asc.sc_flags &= ~(ASC_DMAACTIVE|ASC_MAPLOADED);
! 199: }
! 200:
! 201: int
! 202: asc_tc_intr(sc)
! 203: struct ncr53c9x_softc *sc;
! 204: {
! 205: struct asc_tc_softc *asc = (struct asc_tc_softc *)sc;
! 206: int trans, resid;
! 207:
! 208: resid = 0;
! 209: if ((asc->asc.sc_flags & ASC_ISPULLUP) == 0 &&
! 210: (resid = (NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF)) != 0) {
! 211: NCR_DMA(("asc_tc_intr: empty FIFO of %d ", resid));
! 212: DELAY(1);
! 213: }
! 214:
! 215: resid += NCR_READ_REG(sc, NCR_TCL);
! 216: resid += NCR_READ_REG(sc, NCR_TCM) << 8;
! 217:
! 218: trans = asc->asc.sc_dmasize - resid;
! 219:
! 220: if (asc->asc.sc_flags & ASC_ISPULLUP)
! 221: memcpy(asc->sc_target, asc->sc_bounce, trans);
! 222: *asc->asc.sc_dmalen -= trans;
! 223: *asc->asc.sc_dmaaddr += trans;
! 224: asc->asc.sc_flags &= ~(ASC_DMAACTIVE|ASC_MAPLOADED);
! 225:
! 226: return (0);
! 227: }
! 228:
! 229: int
! 230: asc_tc_setup(sc, addr, len, datain, dmasize)
! 231: struct ncr53c9x_softc *sc;
! 232: caddr_t *addr;
! 233: size_t *len;
! 234: int datain;
! 235: size_t *dmasize;
! 236: {
! 237: struct asc_tc_softc *asc = (struct asc_tc_softc *)sc;
! 238: u_int32_t tc_dmar;
! 239: size_t size;
! 240:
! 241: asc->asc.sc_dmaaddr = addr;
! 242: asc->asc.sc_dmalen = len;
! 243: asc->asc.sc_flags = (datain) ? ASC_ISPULLUP : 0;
! 244:
! 245: NCR_DMA(("asc_tc_setup: start %ld@%p, %s\n", (long)*asc->asc.sc_dmalen,
! 246: *asc->asc.sc_dmaaddr, datain ? "IN" : "OUT"));
! 247:
! 248: size = *dmasize;
! 249: if (size > PER_TGT_DMA_SIZE)
! 250: size = PER_TGT_DMA_SIZE;
! 251: *dmasize = asc->asc.sc_dmasize = size;
! 252:
! 253: NCR_DMA(("asc_tc_setup: dmasize = %ld\n", (long)asc->asc.sc_dmasize));
! 254:
! 255: asc->sc_bounce = asc->sc_base + PMAZ_OFFSET_RAM;
! 256: asc->sc_bounce += PER_TGT_DMA_SIZE *
! 257: sc->sc_nexus->xs->sc_link->target;
! 258: asc->sc_target = *addr;
! 259:
! 260: if ((asc->asc.sc_flags & ASC_ISPULLUP) == 0)
! 261: memcpy(asc->sc_bounce, asc->sc_target, size);
! 262:
! 263: #if 1
! 264: if (asc->asc.sc_flags & ASC_ISPULLUP)
! 265: tc_dmar = PMAZ_DMA_ADDR(asc->sc_bounce);
! 266: else
! 267: tc_dmar = PMAZ_DMAR_WRITE | PMAZ_DMA_ADDR(asc->sc_bounce);
! 268: bus_space_write_4(asc->asc.sc_bst, asc->asc.sc_bsh, PMAZ_OFFSET_DMAR,
! 269: tc_dmar);
! 270: asc->asc.sc_flags |= ASC_MAPLOADED|ASC_DMAACTIVE;
! 271: #endif
! 272: return (0);
! 273: }
! 274:
! 275: void
! 276: asc_tc_go(sc)
! 277: struct ncr53c9x_softc *sc;
! 278: {
! 279: #if 0
! 280: struct asc_tc_softc *asc = (struct asc_tc_softc *)sc;
! 281: u_int32_t tc_dmar;
! 282:
! 283: if (asc->asc.sc_flags & ASC_ISPULLUP)
! 284: tc_dmar = PMAZ_DMA_ADDR(asc->sc_bounce);
! 285: else
! 286: tc_dmar = PMAZ_DMAR_WRITE | PMAZ_DMA_ADDR(asc->sc_bounce);
! 287: bus_space_write_4(asc->asc.sc_bst, asc->asc.sc_bsh, PMAZ_OFFSET_DMAR,
! 288: tc_dmar);
! 289: asc->asc.sc_flags |= ASC_DMAACTIVE;
! 290: #endif
! 291: }
! 292:
! 293: /* NEVER CALLED BY MI 53C9x ENGINE INDEED */
! 294: void
! 295: asc_tc_stop(sc)
! 296: struct ncr53c9x_softc *sc;
! 297: {
! 298: #if 0
! 299: struct asc_tc_softc *asc = (struct asc_tc_softc *)sc;
! 300:
! 301: if (asc->asc.sc_flags & ASC_ISPULLUP)
! 302: memcpy(asc->sc_target, asc->sc_bounce, asc->sc_dmasize);
! 303: asc->asc.sc_flags &= ~ASC_DMAACTIVE;
! 304: #endif
! 305: }
! 306:
! 307: /*
! 308: * Glue functions.
! 309: */
! 310: int
! 311: asc_dma_isintr(sc)
! 312: struct ncr53c9x_softc *sc;
! 313: {
! 314: return !!(NCR_READ_REG(sc, NCR_STAT) & NCRSTAT_INT);
! 315: }
! 316:
! 317: int
! 318: asc_dma_isactive(sc)
! 319: struct ncr53c9x_softc *sc;
! 320: {
! 321: struct asc_tc_softc *asc = (struct asc_tc_softc *)sc;
! 322:
! 323: return !!(asc->asc.sc_flags & ASC_DMAACTIVE);
! 324: }
! 325:
! 326: void
! 327: asc_clear_latched_intr(sc)
! 328: struct ncr53c9x_softc *sc;
! 329: {
! 330: }
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