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tx39uart.c revision 1.15.52.6 
      1 /*	$NetBSD: tx39uart.c,v 1.15.52.6 2021/04/05 00:48:49 thorpej 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  *
     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: tx39uart.c,v 1.15.52.6 2021/04/05 00:48:49 thorpej Exp $");
     34 
     35 #include "opt_tx39uart_debug.h"
     36 
     37 #include <sys/param.h>
     38 #include <sys/systm.h>
     39 #include <sys/device.h>
     40 
     41 #include <machine/bus.h>
     42 #include <machine/intr.h>
     43 
     44 #include <hpcmips/tx/tx39var.h>
     45 #include <hpcmips/tx/tx39uartvar.h>
     46 
     47 #include "locators.h"
     48 
     49 int	tx39uart_match(device_t, cfdata_t, void *);
     50 void	tx39uart_attach(device_t, device_t, void *);
     51 int	tx39uart_print(void *, const char *);
     52 int	tx39uart_search(device_t, cfdata_t, const int *, void *);
     53 
     54 struct tx39uart_softc {
     55 	tx_chipset_tag_t sc_tc;
     56 	int sc_enabled;
     57 };
     58 
     59 CFATTACH_DECL_NEW(tx39uart, sizeof(struct tx39uart_softc),
     60     tx39uart_match, tx39uart_attach, NULL, NULL);
     61 
     62 int
     63 tx39uart_match(device_t parent, cfdata_t cf, void *aux)
     64 {
     65 	return ATTACH_LAST;
     66 }
     67 
     68 void
     69 tx39uart_attach(device_t parent, device_t self, void *aux)
     70 {
     71 	struct txsim_attach_args *ta = aux;
     72 	struct tx39uart_softc *sc = device_private(self);
     73 	tx_chipset_tag_t tc;
     74 
     75 	printf("\n");
     76 	sc->sc_tc = tc = ta->ta_tc;
     77 
     78 	config_search(self, NULL,
     79 	    CFARG_SEARCH, tx39uart_search,
     80 	    CFARG_EOL);
     81 }
     82 
     83 int
     84 tx39uart_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
     85 {
     86 	struct tx39uart_softc *sc = device_private(parent);
     87 	struct tx39uart_attach_args ua;
     88 
     89 	ua.ua_tc	= sc->sc_tc;
     90 	ua.ua_slot	= cf->cf_loc[TXCOMIFCF_SLOT];
     91 
     92 	if (ua.ua_slot == TXCOMIFCF_SLOT_DEFAULT) {
     93 		printf("tx39uart_search: wildcarded slot, skipping\n");
     94 		return 0;
     95 	}
     96 
     97 	if (!(sc->sc_enabled & (1 << ua.ua_slot)) && /* not attached slot */
     98 	    config_probe(parent, cf, &ua)) {
     99 		config_attach(parent, cf, &ua, tx39uart_print, CFARG_EOL);
    100 		sc->sc_enabled |= (1 << ua.ua_slot);
    101 	}
    102 
    103 	return 0;
    104 }
    105 
    106 int
    107 tx39uart_print(void *aux, const char *pnp)
    108 {
    109 	struct tx39uart_attach_args *ua = aux;
    110 
    111 	aprint_normal(" slot %d", ua->ua_slot);
    112 
    113 	return QUIET;
    114 }
    115