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      1 /*	$NetBSD: lm_isa_common.c,v 1.7 2020/06/24 19:11:49 jdolecek Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2000 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Bill Squier.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: lm_isa_common.c,v 1.7 2020/06/24 19:11:49 jdolecek Exp $");
     34 
     35 #include <sys/param.h>
     36 #include <sys/systm.h>
     37 #include <sys/kernel.h>
     38 #include <sys/device.h>
     39 #include <sys/module.h>
     40 #include <sys/conf.h>
     41 #include <sys/kmem.h>
     42 
     43 #include <sys/bus.h>
     44 
     45 #include <dev/isa/isareg.h>
     46 #include <dev/isa/isavar.h>
     47 
     48 #include <dev/ic/nslm7xvar.h>
     49 
     50 int 	lm_isa_match(device_t, cfdata_t, void *);
     51 void 	lm_isa_attach(device_t, device_t, void *);
     52 int 	lm_isa_detach(device_t, int);
     53 
     54 static uint8_t 	lm_isa_readreg(struct lm_softc *, int);
     55 static void 	lm_isa_writereg(struct lm_softc *, int, uint8_t);
     56 
     57 struct lm_isa_softc {
     58 	struct lm_softc lmsc;
     59 	bus_space_tag_t lm_iot;
     60 	bus_space_handle_t lm_ioh;
     61 };
     62 
     63 int
     64 lm_isa_match(device_t parent, cfdata_t match, void *aux)
     65 {
     66 	bus_space_handle_t ioh;
     67 	struct isa_attach_args *ia = aux;
     68 	struct lm_isa_softc *sc;
     69 	int rv;
     70 
     71 	/* Must supply an address */
     72 	if (ia->ia_nio < 1)
     73 		return 0;
     74 
     75 	if (ISA_DIRECT_CONFIG(ia))
     76 		return 0;
     77 
     78 	if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
     79 		return 0;
     80 
     81 	if (bus_space_map(ia->ia_iot, ia->ia_io[0].ir_addr, 8, 0, &ioh))
     82 		return 0;
     83 
     84 	/* Bus independent probe */
     85 	sc = kmem_zalloc(sizeof(*sc), KM_SLEEP);
     86 	sc->lm_iot = ia->ia_iot;
     87 	sc->lm_ioh = ioh;
     88 	sc->lmsc.lm_writereg = lm_isa_writereg;
     89 	sc->lmsc.lm_readreg = lm_isa_readreg;
     90 	rv = lm_match(&sc->lmsc);
     91 	kmem_free(sc, sizeof(*sc));
     92 
     93 	bus_space_unmap(ia->ia_iot, ioh, 8);
     94 
     95 	if (rv) {
     96 		ia->ia_nio = 1;
     97 		ia->ia_io[0].ir_size = 8;
     98 
     99 		ia->ia_niomem = 0;
    100 		ia->ia_nirq = 0;
    101 		ia->ia_ndrq = 0;
    102 	}
    103 
    104 	return rv;
    105 }
    106 
    107 
    108 void
    109 lm_isa_attach(device_t parent, device_t self, void *aux)
    110 {
    111 	struct lm_isa_softc *sc = device_private(self);
    112 	struct isa_attach_args *ia = aux;
    113 
    114 	sc->lm_iot = ia->ia_iot;
    115 
    116 	if (bus_space_map(ia->ia_iot, ia->ia_io[0].ir_addr, 8, 0,
    117 	    &sc->lm_ioh)) {
    118 		aprint_error(": can't map i/o space\n");
    119 		return;
    120 	}
    121 
    122 	/* Bus-independent attachment */
    123 	sc->lmsc.sc_dev = self;
    124 	sc->lmsc.lm_writereg = lm_isa_writereg;
    125 	sc->lmsc.lm_readreg = lm_isa_readreg;
    126 	/* pass wbsio Device ID */
    127 	sc->lmsc.sioid = (uint16_t)(uintptr_t)ia->ia_aux;
    128 
    129 	lm_attach(&sc->lmsc);
    130 }
    131 
    132 int
    133 lm_isa_detach(device_t self, int flags)
    134 {
    135 	struct lm_isa_softc *sc = device_private(self);
    136 
    137 	lm_detach(&sc->lmsc);
    138 	bus_space_unmap(sc->lm_iot, sc->lm_ioh, 8);
    139 	return 0;
    140 }
    141 
    142 static uint8_t
    143 lm_isa_readreg(struct lm_softc *lmsc, int reg)
    144 {
    145 	struct lm_isa_softc *sc = (struct lm_isa_softc *)lmsc;
    146 
    147 	bus_space_write_1(sc->lm_iot, sc->lm_ioh, LMC_ADDR, reg);
    148 	return bus_space_read_1(sc->lm_iot, sc->lm_ioh, LMC_DATA);
    149 }
    150 
    151 static void
    152 lm_isa_writereg(struct lm_softc *lmsc, int reg, uint8_t val)
    153 {
    154 	struct lm_isa_softc *sc = (struct lm_isa_softc *)lmsc;
    155 
    156 	bus_space_write_1(sc->lm_iot, sc->lm_ioh, LMC_ADDR, reg);
    157 	bus_space_write_1(sc->lm_iot, sc->lm_ioh, LMC_DATA, val);
    158 }
    159 
    160 MODULE(MODULE_CLASS_DRIVER, lm_isa_common, "lm");
    161 
    162 static int
    163 lm_isa_common_modcmd(modcmd_t cmd, void *priv)
    164 {
    165 	if ((cmd == MODULE_CMD_INIT) || (cmd == MODULE_CMD_FINI))
    166 		return 0;
    167 	return ENOTTY;
    168 }
    169