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asc_tc.c revision 1.23.2.1
      1  1.23.2.1     skrll /* $NetBSD: asc_tc.c,v 1.23.2.1 2005/02/04 11:47:34 skrll Exp $ */
      2       1.1  jonathan 
      3      1.16    simonb /*-
      4      1.16    simonb  * Copyright (c) 2000 The NetBSD Foundation, Inc.
      5      1.16    simonb  * All rights reserved.
      6      1.16    simonb  *
      7      1.16    simonb  * This code is derived from software contributed to The NetBSD Foundation
      8      1.16    simonb  * by Tohru Nishimura.
      9       1.1  jonathan  *
     10      1.16    simonb  * Redistribution and use in source and binary forms, with or without
     11      1.16    simonb  * modification, are permitted provided that the following conditions
     12      1.16    simonb  * are met:
     13      1.16    simonb  * 1. Redistributions of source code must retain the above copyright
     14      1.16    simonb  *    notice, this list of conditions and the following disclaimer.
     15      1.16    simonb  * 2. Redistributions in binary form must reproduce the above copyright
     16      1.16    simonb  *    notice, this list of conditions and the following disclaimer in the
     17      1.16    simonb  *    documentation and/or other materials provided with the distribution.
     18      1.16    simonb  * 3. All advertising materials mentioning features or use of this software
     19      1.16    simonb  *    must display the following acknowledgement:
     20      1.16    simonb  *	This product includes software developed by the NetBSD
     21      1.16    simonb  *	Foundation, Inc. and its contributors.
     22      1.16    simonb  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23      1.16    simonb  *    contributors may be used to endorse or promote products derived
     24      1.16    simonb  *    from this software without specific prior written permission.
     25       1.1  jonathan  *
     26      1.16    simonb  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27      1.16    simonb  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28      1.16    simonb  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29      1.16    simonb  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30      1.16    simonb  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31      1.16    simonb  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32      1.16    simonb  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33      1.16    simonb  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34      1.16    simonb  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35      1.16    simonb  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36      1.16    simonb  * POSSIBILITY OF SUCH DAMAGE.
     37       1.1  jonathan  */
     38       1.1  jonathan 
     39      1.18     lukem #include <sys/cdefs.h>
     40  1.23.2.1     skrll __KERNEL_RCSID(0, "$NetBSD: asc_tc.c,v 1.23.2.1 2005/02/04 11:47:34 skrll Exp $");
     41      1.16    simonb 
     42       1.1  jonathan #include <sys/param.h>
     43       1.1  jonathan #include <sys/systm.h>
     44       1.1  jonathan #include <sys/device.h>
     45      1.16    simonb #include <sys/buf.h>
     46      1.16    simonb 
     47      1.16    simonb #include <dev/scsipi/scsi_all.h>
     48      1.16    simonb #include <dev/scsipi/scsipi_all.h>
     49      1.16    simonb #include <dev/scsipi/scsiconf.h>
     50      1.16    simonb #include <dev/scsipi/scsi_message.h>
     51      1.16    simonb 
     52      1.16    simonb #include <machine/bus.h>
     53      1.16    simonb 
     54      1.16    simonb #include <dev/ic/ncr53c9xreg.h>
     55      1.16    simonb #include <dev/ic/ncr53c9xvar.h>
     56      1.10       mrg 
     57       1.1  jonathan #include <dev/tc/tcvar.h>
     58       1.1  jonathan 
     59      1.16    simonb struct asc_softc {
     60      1.16    simonb 	struct ncr53c9x_softc sc_ncr53c9x;	/* glue to MI code */
     61      1.16    simonb 	bus_space_tag_t sc_bst;
     62      1.16    simonb 	bus_space_handle_t sc_bsh;
     63      1.16    simonb 	bus_dma_tag_t sc_dmat;
     64      1.16    simonb 	bus_dmamap_t sc_dmamap;
     65      1.16    simonb 	caddr_t *sc_dmaaddr;
     66      1.16    simonb 	size_t	*sc_dmalen;
     67      1.16    simonb 	size_t	sc_dmasize;
     68      1.16    simonb 	int	sc_active;			/* DMA active ? */
     69      1.16    simonb 	int	sc_ispullup;			/* DMA into main memory? */
     70       1.1  jonathan 
     71      1.16    simonb 	/* XXX XXX XXX */
     72      1.16    simonb 	caddr_t sc_base, sc_bounce, sc_target;
     73      1.16    simonb };
     74       1.1  jonathan 
     75  1.23.2.1     skrll static int  asc_tc_match(struct device *, struct cfdata *, void *);
     76  1.23.2.1     skrll static void asc_tc_attach(struct device *, struct device *, void *);
     77       1.1  jonathan 
     78      1.21   thorpej CFATTACH_DECL(asc_tc, sizeof(struct asc_softc),
     79      1.22   thorpej     asc_tc_match, asc_tc_attach, NULL, NULL);
     80       1.1  jonathan 
     81  1.23.2.1     skrll static u_char	asc_read_reg(struct ncr53c9x_softc *, int);
     82  1.23.2.1     skrll static void	asc_write_reg(struct ncr53c9x_softc *, int, u_char);
     83  1.23.2.1     skrll static int	asc_dma_isintr(struct ncr53c9x_softc *);
     84  1.23.2.1     skrll static void	asc_tc_reset(struct ncr53c9x_softc *);
     85  1.23.2.1     skrll static int	asc_tc_intr(struct ncr53c9x_softc *);
     86  1.23.2.1     skrll static int	asc_tc_setup(struct ncr53c9x_softc *, caddr_t *,
     87  1.23.2.1     skrll 						size_t *, int, size_t *);
     88  1.23.2.1     skrll static void	asc_tc_go(struct ncr53c9x_softc *);
     89  1.23.2.1     skrll static void	asc_tc_stop(struct ncr53c9x_softc *);
     90  1.23.2.1     skrll static int	asc_dma_isactive(struct ncr53c9x_softc *);
     91  1.23.2.1     skrll static void	asc_clear_latched_intr(struct ncr53c9x_softc *);
     92      1.16    simonb 
     93      1.17    simonb static struct ncr53c9x_glue asc_tc_glue = {
     94      1.16    simonb         asc_read_reg,
     95      1.16    simonb         asc_write_reg,
     96      1.16    simonb         asc_dma_isintr,
     97      1.17    simonb         asc_tc_reset,
     98      1.17    simonb         asc_tc_intr,
     99      1.17    simonb         asc_tc_setup,
    100      1.17    simonb         asc_tc_go,
    101      1.17    simonb         asc_tc_stop,
    102      1.16    simonb         asc_dma_isactive,
    103      1.16    simonb         asc_clear_latched_intr,
    104       1.1  jonathan };
    105       1.1  jonathan 
    106       1.1  jonathan /*
    107      1.16    simonb  * Parameters specific to PMAZ-A TC option card.
    108       1.1  jonathan  */
    109      1.16    simonb #define PMAZ_OFFSET_53C94	0x0		/* from module base */
    110      1.16    simonb #define PMAZ_OFFSET_DMAR	0x40000		/* DMA Address Register */
    111      1.16    simonb #define PMAZ_OFFSET_RAM		0x80000		/* 128KB SRAM buffer */
    112      1.16    simonb #define PMAZ_OFFSET_ROM		0xc0000		/* diagnostic ROM */
    113      1.16    simonb 
    114      1.16    simonb #define PMAZ_RAM_SIZE		0x20000		/* 128k (32k*32) */
    115      1.16    simonb #define PER_TGT_DMA_SIZE	((PMAZ_RAM_SIZE/7) & ~(sizeof(int)-1))
    116      1.16    simonb 
    117      1.16    simonb #define PMAZ_DMAR_WRITE		0x80000000	/* DMA direction bit */
    118      1.16    simonb #define PMAZ_DMAR_MASK		0x1ffff		/* 17 bits, 128k */
    119      1.16    simonb #define PMAZ_DMA_ADDR(x)	((unsigned long)(x) & PMAZ_DMAR_MASK)
    120       1.1  jonathan 
    121       1.7    mhitch static int
    122      1.17    simonb asc_tc_match(parent, cfdata, aux)
    123       1.1  jonathan 	struct device *parent;
    124      1.16    simonb 	struct cfdata *cfdata;
    125       1.1  jonathan 	void *aux;
    126       1.1  jonathan {
    127      1.16    simonb 	struct tc_attach_args *d = aux;
    128      1.16    simonb 
    129      1.16    simonb 	if (strncmp("PMAZ-AA ", d->ta_modname, TC_ROM_LLEN))
    130       1.1  jonathan 		return (0);
    131       1.1  jonathan 
    132       1.1  jonathan 	return (1);
    133       1.1  jonathan }
    134       1.1  jonathan 
    135      1.16    simonb static void
    136      1.17    simonb asc_tc_attach(parent, self, aux)
    137      1.16    simonb 	struct device *parent, *self;
    138       1.1  jonathan 	void *aux;
    139       1.1  jonathan {
    140      1.16    simonb 	struct tc_attach_args *ta = aux;
    141      1.16    simonb 	struct asc_softc *asc = (struct asc_softc *)self;
    142      1.16    simonb 	struct ncr53c9x_softc *sc = &asc->sc_ncr53c9x;
    143       1.1  jonathan 
    144       1.1  jonathan 	/*
    145      1.16    simonb 	 * Set up glue for MI code early; we use some of it here.
    146       1.1  jonathan 	 */
    147      1.17    simonb 	sc->sc_glue = &asc_tc_glue;
    148      1.16    simonb 	asc->sc_bst = ta->ta_memt;
    149      1.16    simonb 	asc->sc_dmat = ta->ta_dmat;
    150      1.16    simonb 	if (bus_space_map(asc->sc_bst, ta->ta_addr,
    151      1.16    simonb 		PMAZ_OFFSET_RAM + PMAZ_RAM_SIZE, 0, &asc->sc_bsh)) {
    152      1.16    simonb 		printf("%s: unable to map device\n", sc->sc_dev.dv_xname);
    153      1.16    simonb 		return;
    154      1.16    simonb 	}
    155      1.16    simonb 	asc->sc_base = (caddr_t)ta->ta_addr;	/* XXX XXX XXX */
    156      1.16    simonb 
    157      1.16    simonb 	tc_intr_establish(parent, ta->ta_cookie, IPL_BIO, ncr53c9x_intr, sc);
    158      1.16    simonb 
    159      1.16    simonb 	sc->sc_id = 7;
    160      1.16    simonb 	sc->sc_freq = (ta->ta_busspeed) ? 25000000 : 12500000;
    161      1.16    simonb 
    162      1.23   tsutsui 	/* gimme MHz */
    163      1.16    simonb 	sc->sc_freq /= 1000000;
    164       1.1  jonathan 
    165       1.1  jonathan 	/*
    166      1.16    simonb 	 * XXX More of this should be in ncr53c9x_attach(), but
    167      1.16    simonb 	 * XXX should we really poke around the chip that much in
    168      1.16    simonb 	 * XXX the MI code?  Think about this more...
    169       1.1  jonathan 	 */
    170       1.1  jonathan 
    171       1.1  jonathan 	/*
    172      1.16    simonb 	 * Set up static configuration info.
    173       1.1  jonathan 	 */
    174      1.16    simonb 	sc->sc_cfg1 = sc->sc_id | NCRCFG1_PARENB;
    175      1.16    simonb 	sc->sc_cfg2 = NCRCFG2_SCSI2;
    176      1.16    simonb 	sc->sc_cfg3 = 0;
    177      1.16    simonb 	sc->sc_rev = NCR_VARIANT_NCR53C94;
    178       1.7    mhitch 
    179       1.7    mhitch 	/*
    180      1.16    simonb 	 * XXX minsync and maxxfer _should_ be set up in MI code,
    181      1.16    simonb 	 * XXX but it appears to have some dependency on what sort
    182      1.16    simonb 	 * XXX of DMA we're hooked up to, etc.
    183       1.7    mhitch 	 */
    184       1.7    mhitch 
    185       1.7    mhitch 	/*
    186      1.16    simonb 	 * This is the value used to start sync negotiations
    187      1.16    simonb 	 * Note that the NCR register "SYNCTP" is programmed
    188      1.16    simonb 	 * in "clocks per byte", and has a minimum value of 4.
    189      1.16    simonb 	 * The SCSI period used in negotiation is one-fourth
    190      1.16    simonb 	 * of the time (in nanoseconds) needed to transfer one byte.
    191      1.16    simonb 	 * Since the chip's clock is given in MHz, we have the following
    192      1.16    simonb 	 * formula: 4 * period = (1000 / freq) * 4
    193       1.7    mhitch 	 */
    194      1.16    simonb 	sc->sc_minsync = (1000 / sc->sc_freq) * 5 / 4;
    195       1.7    mhitch 
    196      1.16    simonb 	sc->sc_maxxfer = 64 * 1024;
    197       1.1  jonathan 
    198      1.16    simonb 	/* Do the common parts of attachment. */
    199      1.16    simonb 	sc->sc_adapter.adapt_minphys = minphys;
    200      1.16    simonb 	sc->sc_adapter.adapt_request = ncr53c9x_scsipi_request;
    201      1.16    simonb 	ncr53c9x_attach(sc);
    202      1.16    simonb }
    203      1.16    simonb 
    204      1.16    simonb static void
    205      1.17    simonb asc_tc_reset(sc)
    206      1.16    simonb 	struct ncr53c9x_softc *sc;
    207      1.16    simonb {
    208      1.16    simonb 	struct asc_softc *asc = (struct asc_softc *)sc;
    209      1.16    simonb 
    210      1.16    simonb 	asc->sc_active = 0;
    211      1.16    simonb }
    212      1.16    simonb 
    213      1.16    simonb static int
    214      1.17    simonb asc_tc_intr(sc)
    215      1.16    simonb 	struct ncr53c9x_softc *sc;
    216      1.16    simonb {
    217      1.16    simonb 	struct asc_softc *asc = (struct asc_softc *)sc;
    218      1.16    simonb 	int trans, resid;
    219      1.16    simonb 
    220      1.16    simonb 	resid = 0;
    221      1.16    simonb 	if (!asc->sc_ispullup &&
    222      1.16    simonb 	    (resid = (NCR_READ_REG(sc, NCR_FFLAG) & NCRFIFO_FF)) != 0) {
    223      1.17    simonb 		NCR_DMA(("asc_tc_intr: empty FIFO of %d ", resid));
    224      1.16    simonb 		DELAY(1);
    225      1.16    simonb 	}
    226      1.16    simonb 
    227      1.16    simonb 	resid += NCR_READ_REG(sc, NCR_TCL);
    228      1.16    simonb 	resid += NCR_READ_REG(sc, NCR_TCM) << 8;
    229      1.16    simonb 
    230      1.16    simonb 	trans = asc->sc_dmasize - resid;
    231      1.16    simonb 
    232      1.16    simonb 	if (asc->sc_ispullup)
    233      1.16    simonb 		memcpy(asc->sc_target, asc->sc_bounce, trans);
    234      1.16    simonb 	*asc->sc_dmalen -= trans;
    235      1.16    simonb 	*asc->sc_dmaaddr += trans;
    236      1.16    simonb 	asc->sc_active = 0;
    237      1.16    simonb 
    238      1.16    simonb 	return (0);
    239      1.16    simonb }
    240      1.16    simonb 
    241      1.16    simonb static int
    242      1.17    simonb asc_tc_setup(sc, addr, len, datain, dmasize)
    243      1.16    simonb 	struct ncr53c9x_softc *sc;
    244      1.16    simonb 	caddr_t *addr;
    245      1.16    simonb 	size_t *len;
    246      1.16    simonb 	int datain;
    247      1.16    simonb 	size_t *dmasize;
    248      1.16    simonb {
    249      1.16    simonb 	struct asc_softc *asc = (struct asc_softc *)sc;
    250      1.16    simonb 	u_int32_t tc_dmar;
    251      1.16    simonb 	size_t size;
    252      1.16    simonb 
    253      1.16    simonb 	asc->sc_dmaaddr = addr;
    254      1.16    simonb 	asc->sc_dmalen = len;
    255      1.16    simonb 	asc->sc_ispullup = datain;
    256      1.16    simonb 
    257      1.17    simonb 	NCR_DMA(("asc_tc_setup: start %ld@%p, %s\n", (long)*asc->sc_dmalen,
    258      1.16    simonb 		*asc->sc_dmaaddr, datain ? "IN" : "OUT"));
    259      1.16    simonb 
    260      1.16    simonb 	size = *dmasize;
    261      1.16    simonb 	if (size > PER_TGT_DMA_SIZE)
    262      1.16    simonb 		size = PER_TGT_DMA_SIZE;
    263      1.16    simonb 	*dmasize = asc->sc_dmasize = size;
    264      1.16    simonb 
    265      1.17    simonb 	NCR_DMA(("asc_tc_setup: dmasize = %ld\n", (long)asc->sc_dmasize));
    266      1.16    simonb 
    267      1.16    simonb 	asc->sc_bounce = asc->sc_base + PMAZ_OFFSET_RAM;
    268      1.16    simonb 	asc->sc_bounce += PER_TGT_DMA_SIZE *
    269      1.16    simonb 	    sc->sc_nexus->xs->xs_periph->periph_target;
    270      1.16    simonb 	asc->sc_target = *addr;
    271      1.16    simonb 
    272      1.16    simonb 	if (!asc->sc_ispullup)
    273      1.16    simonb 		memcpy(asc->sc_bounce, asc->sc_target, size);
    274      1.16    simonb 
    275      1.16    simonb #if 1
    276      1.16    simonb 	if (asc->sc_ispullup)
    277      1.16    simonb 		tc_dmar = PMAZ_DMA_ADDR(asc->sc_bounce);
    278      1.16    simonb 	else
    279      1.16    simonb 		tc_dmar = PMAZ_DMAR_WRITE | PMAZ_DMA_ADDR(asc->sc_bounce);
    280      1.16    simonb 	bus_space_write_4(asc->sc_bst, asc->sc_bsh, PMAZ_OFFSET_DMAR, tc_dmar);
    281      1.16    simonb 	asc->sc_active = 1;
    282      1.16    simonb #endif
    283      1.16    simonb 	return (0);
    284      1.16    simonb }
    285      1.16    simonb 
    286      1.16    simonb static void
    287      1.17    simonb asc_tc_go(sc)
    288      1.16    simonb 	struct ncr53c9x_softc *sc;
    289      1.16    simonb {
    290      1.16    simonb #if 0
    291      1.16    simonb 	struct asc_softc *asc = (struct asc_softc *)sc;
    292      1.16    simonb 	u_int32_t tc_dmar;
    293       1.1  jonathan 
    294      1.16    simonb 	if (asc->sc_ispullup)
    295      1.16    simonb 		tc_dmar = PMAZ_DMA_ADDR(asc->sc_bounce);
    296      1.16    simonb 	else
    297      1.16    simonb 		tc_dmar = PMAZ_DMAR_WRITE | PMAZ_DMA_ADDR(asc->sc_bounce);
    298      1.16    simonb 	bus_space_write_4(asc->sc_bst, asc->sc_bsh, PMAZ_OFFSET_DMAR, tc_dmar);
    299      1.16    simonb 	asc->sc_active = 1;
    300      1.16    simonb #endif
    301       1.1  jonathan }
    302       1.1  jonathan 
    303      1.16    simonb /* NEVER CALLED BY MI 53C9x ENGINE INDEED */
    304      1.16    simonb static void
    305      1.17    simonb asc_tc_stop(sc)
    306      1.16    simonb 	struct ncr53c9x_softc *sc;
    307      1.16    simonb {
    308      1.16    simonb #if 0
    309      1.16    simonb 	struct asc_softc *asc = (struct asc_softc *)sc;
    310      1.16    simonb 
    311      1.16    simonb 	if (asc->sc_ispullup)
    312      1.16    simonb 		memcpy(asc->sc_target, asc->sc_bounce, asc->sc_dmasize);
    313      1.16    simonb 	asc->sc_active = 0;
    314      1.16    simonb #endif
    315      1.16    simonb }
    316       1.1  jonathan 
    317       1.1  jonathan /*
    318      1.16    simonb  * Glue functions.
    319       1.1  jonathan  */
    320      1.16    simonb static u_char
    321      1.16    simonb asc_read_reg(sc, reg)
    322      1.16    simonb 	struct ncr53c9x_softc *sc;
    323      1.16    simonb 	int reg;
    324      1.16    simonb {
    325      1.16    simonb 	struct asc_softc *asc = (struct asc_softc *)sc;
    326      1.16    simonb 	u_char v;
    327      1.16    simonb 
    328      1.16    simonb 	v = bus_space_read_4(asc->sc_bst, asc->sc_bsh,
    329      1.16    simonb 	    reg * sizeof(u_int32_t)) & 0xff;
    330      1.16    simonb 
    331      1.16    simonb 	return (v);
    332      1.16    simonb }
    333      1.16    simonb 
    334      1.16    simonb static void
    335      1.16    simonb asc_write_reg(sc, reg, val)
    336      1.16    simonb 	struct ncr53c9x_softc *sc;
    337      1.16    simonb 	int reg;
    338      1.16    simonb 	u_char val;
    339      1.16    simonb {
    340      1.16    simonb 	struct asc_softc *asc = (struct asc_softc *)sc;
    341      1.16    simonb 
    342      1.16    simonb 	bus_space_write_4(asc->sc_bst, asc->sc_bsh,
    343      1.16    simonb 	    reg * sizeof(u_int32_t), val);
    344      1.16    simonb }
    345      1.16    simonb 
    346      1.16    simonb static int
    347      1.16    simonb asc_dma_isintr(sc)
    348      1.16    simonb 	struct ncr53c9x_softc *sc;
    349      1.16    simonb {
    350      1.16    simonb 	return !!(NCR_READ_REG(sc, NCR_STAT) & NCRSTAT_INT);
    351      1.16    simonb }
    352      1.16    simonb 
    353       1.7    mhitch static int
    354      1.16    simonb asc_dma_isactive(sc)
    355      1.16    simonb 	struct ncr53c9x_softc *sc;
    356       1.1  jonathan {
    357      1.16    simonb 	struct asc_softc *asc = (struct asc_softc *)sc;
    358       1.1  jonathan 
    359      1.16    simonb 	return (asc->sc_active);
    360       1.1  jonathan }
    361       1.1  jonathan 
    362       1.1  jonathan static void
    363      1.16    simonb asc_clear_latched_intr(sc)
    364      1.16    simonb 	struct ncr53c9x_softc *sc;
    365       1.1  jonathan {
    366       1.1  jonathan }
    367