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dpt_eisa.c revision 1.6 
      1 /*	$NetBSD: dpt_eisa.c,v 1.6 2001/11/13 12:47:33 lukem 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 1.6 2001/11/13 12:47:33 lukem 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 struct cfattach dpt_eisa_ca = {
     63 	sizeof(struct dpt_softc), dpt_eisa_match, dpt_eisa_attach
     64 };
     65 
     66 static const char * const dpt_eisa_boards[] = {
     67 	"DPT2402",
     68 	"DPTA401",
     69 	"DPTA402",
     70 	"DPTA410",
     71 	"DPTA411",
     72 	"DPTA412",
     73 	"DPTA420",
     74 	"DPTA501",
     75 	"DPTA502",
     76 	"DPTA701",
     77 	"DPTBC01",
     78 	"NEC8200",	/* OEM */
     79 	"ATT2408",	/* OEM */
     80 	NULL
     81 };
     82 
     83 static int
     84 dpt_eisa_irq(bus_space_tag_t iot, bus_space_handle_t ioh, int *irq)
     85 {
     86 
     87 	switch (bus_space_read_1(iot, ioh, DPT_EISA_IOCONF) & 0x38) {
     88 	case 0x08:
     89 		*irq = 11;
     90 		break;
     91 	case 0x10:
     92 		*irq = 15;
     93 		break;
     94 	case 0x20:
     95 		*irq = 14;
     96 		break;
     97 	default:
     98 		return (-1);
     99 	}
    100 
    101 	return (0);
    102 }
    103 
    104 static int
    105 dpt_eisa_match(struct device *parent, struct cfdata *match, void *aux)
    106 {
    107 	struct eisa_attach_args *ea;
    108 	int i;
    109 
    110 	ea = aux;
    111 
    112 	for (i = 0; dpt_eisa_boards[i] != NULL; i++)
    113 		if (strcmp(ea->ea_idstring, dpt_eisa_boards[i]) == 0)
    114 			break;
    115 
    116 	return (dpt_eisa_boards[i] != NULL);
    117 }
    118 
    119 static void
    120 dpt_eisa_attach(struct device *parent, struct device *self, void *aux)
    121 {
    122 	struct eisa_attach_args *ea;
    123 	bus_space_handle_t ioh;
    124 	eisa_chipset_tag_t ec;
    125 	eisa_intr_handle_t ih;
    126 	struct dpt_softc *sc;
    127 	bus_space_tag_t iot;
    128 	const char *intrstr;
    129 	int irq;
    130 
    131 	ea = aux;
    132 	sc = (struct dpt_softc *)self;
    133 	iot = ea->ea_iot;
    134 	ec = ea->ea_ec;
    135 
    136 	printf(": ");
    137 
    138 	if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) +
    139 	    DPT_EISA_SLOT_OFFSET, DPT_EISA_IOSIZE, 0, &ioh)) {
    140 		printf("can't map i/o space\n");
    141 		return;
    142 	}
    143 
    144 	sc->sc_iot = iot;
    145 	sc->sc_ioh = ioh;
    146 	sc->sc_dmat = ea->ea_dmat;
    147 
    148 	/* Map and establish the interrupt. */
    149 	if (dpt_eisa_irq(iot, ioh, &irq)) {
    150 		printf("HBA on invalid IRQ\n");
    151 		return;
    152 	}
    153 
    154 	if (eisa_intr_map(ec, irq, &ih)) {
    155 		printf("can't map interrupt (%d)\n", irq);
    156 		return;
    157 	}
    158 
    159 	intrstr = eisa_intr_string(ec, ih);
    160 	sc->sc_ih = eisa_intr_establish(ec, ih, IST_LEVEL, IPL_BIO,
    161 	    dpt_intr, sc);
    162 	if (sc->sc_ih == NULL) {
    163 		printf("can't establish interrupt");
    164 		if (intrstr != NULL)
    165 			printf(" at %s", intrstr);
    166 		printf("\n");
    167 		return;
    168 	}
    169 
    170 	/* Read the EATA configuration. */
    171 	if (dpt_readcfg(sc)) {
    172 		printf("%s: readcfg failed - see dpt(4)\n",
    173 		    sc->sc_dv.dv_xname);
    174 		return;
    175 	}
    176 
    177 	/* Now attach to the bus-independent code. */
    178 	dpt_init(sc, intrstr);
    179 }
    180