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dpt_eisa.c revision 1.9 
      1 /*	$NetBSD: dpt_eisa.c,v 1.9 2002/10/02 16:33:46 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1999, 2000, 2001 Andrew Doran <ad (at) netbsd.org>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  *
     28  */
     29 
     30 /*
     31  * EISA front-end for DPT EATA SCSI driver.
     32  */
     33 
     34 #include <sys/cdefs.h>
     35 __KERNEL_RCSID(0, "$NetBSD: dpt_eisa.c,v 1.9 2002/10/02 16:33:46 thorpej Exp $");
     36 
     37 #include <sys/param.h>
     38 #include <sys/systm.h>
     39 #include <sys/device.h>
     40 #include <sys/queue.h>
     41 
     42 #include <machine/bus.h>
     43 #include <machine/intr.h>
     44 
     45 #include <dev/scsipi/scsipi_all.h>
     46 #include <dev/scsipi/scsiconf.h>
     47 
     48 #include <dev/eisa/eisavar.h>
     49 
     50 #include <dev/ic/dptreg.h>
     51 #include <dev/ic/dptvar.h>
     52 
     53 #define DPT_EISA_SLOT_OFFSET		0x0c00
     54 #define DPT_EISA_IOSIZE			0x0100
     55 #define DPT_EISA_IOCONF			0x90
     56 #define DPT_EISA_EATA_REG_OFFSET	0x88
     57 
     58 static void	dpt_eisa_attach(struct device *, struct device *, void *);
     59 static int	dpt_eisa_irq(bus_space_tag_t, bus_space_handle_t, int *);
     60 static int	dpt_eisa_match(struct device *, struct cfdata *, void *);
     61 
     62 CFATTACH_DECL(dpt_eisa, sizeof(struct dpt_softc),
     63     dpt_eisa_match, dpt_eisa_attach, NULL, NULL);
     64 
     65 static const char * const dpt_eisa_boards[] = {
     66 	"DPT2402",
     67 	"DPTA401",
     68 	"DPTA402",
     69 	"DPTA410",
     70 	"DPTA411",
     71 	"DPTA412",
     72 	"DPTA420",
     73 	"DPTA501",
     74 	"DPTA502",
     75 	"DPTA701",
     76 	"DPTBC01",
     77 	"NEC8200",	/* OEM */
     78 	"ATT2408",	/* OEM */
     79 	NULL
     80 };
     81 
     82 static int
     83 dpt_eisa_irq(bus_space_tag_t iot, bus_space_handle_t ioh, int *irq)
     84 {
     85 
     86 	switch (bus_space_read_1(iot, ioh, DPT_EISA_IOCONF) & 0x38) {
     87 	case 0x08:
     88 		*irq = 11;
     89 		break;
     90 	case 0x10:
     91 		*irq = 15;
     92 		break;
     93 	case 0x20:
     94 		*irq = 14;
     95 		break;
     96 	default:
     97 		return (-1);
     98 	}
     99 
    100 	return (0);
    101 }
    102 
    103 static int
    104 dpt_eisa_match(struct device *parent, struct cfdata *match, void *aux)
    105 {
    106 	struct eisa_attach_args *ea;
    107 	int i;
    108 
    109 	ea = aux;
    110 
    111 	for (i = 0; dpt_eisa_boards[i] != NULL; i++)
    112 		if (strcmp(ea->ea_idstring, dpt_eisa_boards[i]) == 0)
    113 			break;
    114 
    115 	return (dpt_eisa_boards[i] != NULL);
    116 }
    117 
    118 static void
    119 dpt_eisa_attach(struct device *parent, struct device *self, void *aux)
    120 {
    121 	struct eisa_attach_args *ea;
    122 	bus_space_handle_t ioh;
    123 	eisa_chipset_tag_t ec;
    124 	eisa_intr_handle_t ih;
    125 	struct dpt_softc *sc;
    126 	bus_space_tag_t iot;
    127 	const char *intrstr;
    128 	int irq;
    129 
    130 	ea = aux;
    131 	sc = (struct dpt_softc *)self;
    132 	iot = ea->ea_iot;
    133 	ec = ea->ea_ec;
    134 
    135 	printf(": ");
    136 
    137 	if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) +
    138 	    DPT_EISA_SLOT_OFFSET, DPT_EISA_IOSIZE, 0, &ioh)) {
    139 		printf("can't map i/o space\n");
    140 		return;
    141 	}
    142 
    143 	sc->sc_iot = iot;
    144 	sc->sc_ioh = ioh;
    145 	sc->sc_dmat = ea->ea_dmat;
    146 
    147 	/* Map and establish the interrupt. */
    148 	if (dpt_eisa_irq(iot, ioh, &irq)) {
    149 		printf("HBA on invalid IRQ\n");
    150 		return;
    151 	}
    152 
    153 	if (eisa_intr_map(ec, irq, &ih)) {
    154 		printf("can't map interrupt (%d)\n", irq);
    155 		return;
    156 	}
    157 
    158 	intrstr = eisa_intr_string(ec, ih);
    159 	sc->sc_ih = eisa_intr_establish(ec, ih, IST_LEVEL, IPL_BIO,
    160 	    dpt_intr, sc);
    161 	if (sc->sc_ih == NULL) {
    162 		printf("can't establish interrupt");
    163 		if (intrstr != NULL)
    164 			printf(" at %s", intrstr);
    165 		printf("\n");
    166 		return;
    167 	}
    168 
    169 	/* Read the EATA configuration. */
    170 	if (dpt_readcfg(sc)) {
    171 		printf("%s: readcfg failed - see dpt(4)\n",
    172 		    sc->sc_dv.dv_xname);
    173 		return;
    174 	}
    175 
    176 	/* Now attach to the bus-independent code. */
    177 	dpt_init(sc, intrstr);
    178 }
    179