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tx39uart.c revision 1.5 
      1 /*	$NetBSD: tx39uart.c,v 1.5 2002/01/29 18:53:18 uch Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 1999, 2000 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by UCHIYAMA Yasushi.
      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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include "opt_tx39uart_debug.h"
     40 
     41 #include <sys/param.h>
     42 #include <sys/systm.h>
     43 #include <sys/device.h>
     44 
     45 #include <machine/bus.h>
     46 #include <machine/intr.h>
     47 
     48 #include <hpcmips/tx/tx39var.h>
     49 #include <hpcmips/tx/tx39uartvar.h>
     50 
     51 #include "locators.h"
     52 
     53 int	tx39uart_match(struct device *, struct cfdata *, void *);
     54 void	tx39uart_attach(struct device *, struct device *, void *);
     55 int	tx39uart_print(void *, const char *);
     56 int	tx39uart_search(struct device *, struct cfdata *, void *);
     57 
     58 struct tx39uart_softc {
     59 	struct	device sc_dev;
     60 	tx_chipset_tag_t sc_tc;
     61 	int sc_enabled;
     62 };
     63 
     64 struct cfattach tx39uart_ca = {
     65 	sizeof(struct tx39uart_softc), tx39uart_match, tx39uart_attach
     66 };
     67 
     68 int
     69 tx39uart_match(struct device *parent, struct cfdata *cf, void *aux)
     70 {
     71 	return ATTACH_LAST;
     72 }
     73 
     74 void
     75 tx39uart_attach(struct device *parent, struct device *self, void *aux)
     76 {
     77 	struct txsim_attach_args *ta = aux;
     78 	struct tx39uart_softc *sc = (void *)self;
     79 	tx_chipset_tag_t tc;
     80 
     81 	printf("\n");
     82 	sc->sc_tc = tc = ta->ta_tc;
     83 
     84 	config_search(tx39uart_search, self, tx39uart_print);
     85 }
     86 
     87 int
     88 tx39uart_search(struct device *parent, struct cfdata *cf, void *aux)
     89 {
     90 	struct tx39uart_softc *sc = (void *)parent;
     91 	struct tx39uart_attach_args ua;
     92 
     93 	ua.ua_tc	= sc->sc_tc;
     94 	ua.ua_slot	= cf->cf_loc[TXCOMIFCF_SLOT];
     95 
     96 	if (ua.ua_slot == TXCOMIFCF_SLOT_DEFAULT) {
     97 		printf("tx39uart_search: wildcarded slot, skipping\n");
     98 		return 0;
     99 	}
    100 
    101 	if (!(sc->sc_enabled & (1 << ua.ua_slot)) && /* not attached slot */
    102 	    (*cf->cf_attach->ca_match)(parent, cf, &ua)) {
    103 		config_attach(parent, cf, &ua, tx39uart_print);
    104 		sc->sc_enabled |= (1 << ua.ua_slot);
    105 	}
    106 
    107 	return 0;
    108 }
    109 
    110 int
    111 tx39uart_print(void *aux, const char *pnp)
    112 {
    113 	struct tx39uart_attach_args *ua = aux;
    114 
    115 	printf(" slot %d", ua->ua_slot);
    116 
    117 	return QUIET;
    118 }
    119