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      1 /* $NetBSD: atppc_pioc.c,v 1.7 2023/12/20 06:13:59 thorpej Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2001 Alcove - Nicolas Souchu
      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  * FreeBSD: src/sys/isa/ppc.c,v 1.26.2.5 2001/10/02 05:21:45 nsouch Exp
     29  *
     30  */
     31 
     32 #include "opt_atppc.h"
     33 
     34 #include <sys/param.h>
     35 __KERNEL_RCSID(0, "$NetBSD: atppc_pioc.c,v 1.7 2023/12/20 06:13:59 thorpej Exp $");
     36 
     37 #include <sys/systm.h>
     38 #include <sys/kernel.h>
     39 #include <sys/device.h>
     40 #include <sys/bus.h>
     41 
     42 #include <machine/intr.h>
     43 
     44 #include <arch/acorn32/mainbus/piocvar.h>
     45 
     46 #include <dev/ic/atppcreg.h>
     47 #include <dev/ic/atppcvar.h>
     48 
     49 #include "locators.h"
     50 
     51 /* Probe and attach functions for a atppc device on the PIOC. */
     52 static int atppc_pioc_probe(device_t, cfdata_t, void *);
     53 static void atppc_pioc_attach(device_t, device_t, void *);
     54 
     55 CFATTACH_DECL_NEW(atppc_pioc, sizeof(struct atppc_softc), atppc_pioc_probe,
     56 	atppc_pioc_attach, NULL, NULL);
     57 
     58 #define IO_LPTSIZE 8
     59 
     60 /*
     61  * Probe function: find parallel port controller on isa bus. Combined from
     62  * lpt_isa_probe() in lpt.c and atppc_detect_port() from FreeBSD's ppc.c.
     63  */
     64 static int
     65 atppc_pioc_probe(device_t parent, cfdata_t cf, void *aux)
     66 {
     67 	bus_space_handle_t ioh;
     68 	struct pioc_attach_args *pa = aux;
     69 	bus_space_tag_t iot = pa->pa_iot;
     70 	int addr = pa->pa_iobase + pa->pa_offset;
     71 	int rval = 0;
     72 
     73 	if (pa->pa_name && strcmp(pa->pa_name, "lpt") != 0)
     74 		return 0;
     75 
     76 	if (pa->pa_offset == PIOCCF_OFFSET_DEFAULT) {
     77 		aprint_error_dev(parent, "(%s): io port unknown.\n", __func__);
     78 	} else if (bus_space_map(iot, addr, IO_LPTSIZE, 0, &ioh) == 0) {
     79 		if (atppc_detect_port(iot, ioh) == 0)
     80 			rval = 1;
     81 		else
     82 			aprint_error_dev(parent,
     83 			    "(%s): unable to write/read I/O port.\n",
     84 			    __func__);
     85 		bus_space_unmap(iot, ioh, IO_LPTSIZE);
     86 	} else {
     87 		aprint_error_dev(parent, "(%s): attempt to map bus space failed.\n",
     88 		    __func__);
     89 	}
     90 
     91 	return rval;
     92 }
     93 
     94 /* Attach function: attach and configure parallel port controller on isa bus. */
     95 static void
     96 atppc_pioc_attach(device_t parent, device_t self, void *aux)
     97 {
     98 	struct atppc_softc *sc = device_private(self);
     99 	struct pioc_attach_args *pa = aux;
    100 	bus_addr_t iobase;
    101 
    102 	sc->sc_dev = self;
    103 	sc->sc_iot = pa->pa_iot;
    104 	sc->sc_has = 0;
    105 	iobase = pa->pa_iobase + pa->pa_offset;
    106 
    107 	if (bus_space_map(sc->sc_iot, iobase, IO_LPTSIZE, 0,
    108 		&sc->sc_ioh) != 0) {
    109 		aprint_error(": attempt to map bus space failed, device not "
    110 			"properly attached.\n");
    111 		sc->sc_dev_ok = ATPPC_NOATTACH;
    112 		return;
    113 	}
    114 	sc->sc_dev_ok = ATPPC_ATTACHED;
    115 
    116 	/* Assign interrupt handler */
    117 	if (!(device_cfdata(self)->cf_flags & ATPPC_FLAG_DISABLE_INTR)) {
    118 		if (pa->pa_irq != MAINBUSCF_IRQ_DEFAULT) {
    119 			/* Establish interrupt handler. */
    120 			sc->sc_ieh = intr_claim(pa->pa_irq, IPL_TTY, "atppc",
    121 			    atppcintr, sc);
    122 			sc->sc_has |= ATPPC_HAS_INTR;
    123 		} else
    124 			ATPPC_DPRINTF(("%s: IRQ not assigned or bad number of "
    125 				"IRQs.\n", device_xname(self)));
    126 	} else
    127 		ATPPC_VPRINTF(("%s: interrupts not configured due to flags.\n",
    128 			device_xname(self)));
    129 
    130 	/* Run soft configuration attach */
    131 	atppc_sc_attach(sc);
    132 }
    133