sys/arch/hpcmips/tx/tx39uart.c

   1 /*      $NetBSD: tx39uart.c,v 1.13 2005/12/11 12:17:34 christos 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 1.13 2005/12/11 12:17:34 christos 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(struct device *, struct cfdata *, void *);
  50 void    tx39uart_attach(struct device *, struct device *, void *);
  51 int     tx39uart_print(void *, const char *);
  52 int     tx39uart_search(struct device *, struct cfdata *,
  53                         const int *, void *);
  54
  55 struct tx39uart_softc {
  56         struct  device sc_dev;
  57         tx_chipset_tag_t sc_tc;
  58         int sc_enabled;
  59 };
  60
  61 CFATTACH_DECL(tx39uart, sizeof(struct tx39uart_softc),
  62     tx39uart_match, tx39uart_attach, NULL, NULL);
  63
  64 int
  65 tx39uart_match(struct device *parent, struct cfdata *cf, void *aux)
  66 {
  67         return ATTACH_LAST;
  68 }
  69
  70 void
  71 tx39uart_attach(struct device *parent, struct device *self, void *aux)
  72 {
  73         struct txsim_attach_args *ta = aux;
  74         struct tx39uart_softc *sc = (void *)self;
  75         tx_chipset_tag_t tc;
  76
  77         printf("\n");
  78         sc->sc_tc = tc = ta->ta_tc;
  79
  80         config_search_ia(tx39uart_search, self, "txcomif", tx39uart_print);
  81 }
  82
  83 int
  84 tx39uart_search(struct device *parent, struct cfdata *cf,
  85                 const int *ldesc, void *aux)
  86 {
  87         struct tx39uart_softc *sc = (void *)parent;
  88         struct tx39uart_attach_args ua;
  89
  90         ua.ua_tc        = sc->sc_tc;
  91         ua.ua_slot      = cf->cf_loc[TXCOMIFCF_SLOT];
  92
  93         if (ua.ua_slot == TXCOMIFCF_SLOT_DEFAULT) {
  94                 printf("tx39uart_search: wildcarded slot, skipping\n");
  95                 return 0;
  96         }
  97
  98         if (!(sc->sc_enabled & (1 << ua.ua_slot)) && /* not attached slot */
  99             config_match(parent, cf, &ua)) {
 100                 config_attach(parent, cf, &ua, tx39uart_print);
 101                 sc->sc_enabled |= (1 << ua.ua_slot);
 102         }
 103
 104         return 0;
 105 }
 106
 107 int
 108 tx39uart_print(void *aux, const char *pnp)
 109 {
 110         struct tx39uart_attach_args *ua = aux;
 111
 112         aprint_normal(" slot %d", ua->ua_slot);
 113
 114         return QUIET;
 115 }