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addcom_isa.c revision 1.8.2.1
      1  1.8.2.1     skrll /*	$NetBSD: addcom_isa.c,v 1.8.2.1 2004/08/03 10:47:57 skrll Exp $	*/
      2      1.1  explorer 
      3      1.1  explorer /*
      4      1.2  explorer  * Copyright (c) 2000 Michael Graff.  All rights reserved.
      5      1.1  explorer  * Copyright (c) 1996 Christopher G. Demetriou.  All rights reserved.
      6      1.1  explorer  * Copyright (c) 1995 Charles M. Hannum.  All rights reserved.
      7      1.1  explorer  *
      8      1.1  explorer  * This code is derived from public-domain software written by
      9      1.1  explorer  * Roland McGrath, and information provided by David Muir Sharnoff.
     10      1.1  explorer  *
     11      1.1  explorer  * Redistribution and use in source and binary forms, with or without
     12      1.1  explorer  * modification, are permitted provided that the following conditions
     13      1.1  explorer  * are met:
     14      1.1  explorer  * 1. Redistributions of source code must retain the above copyright
     15      1.1  explorer  *    notice, this list of conditions and the following disclaimer.
     16      1.1  explorer  * 2. Redistributions in binary form must reproduce the above copyright
     17      1.1  explorer  *    notice, this list of conditions and the following disclaimer in the
     18      1.1  explorer  *    documentation and/or other materials provided with the distribution.
     19      1.1  explorer  * 3. All advertising materials mentioning features or use of this software
     20      1.1  explorer  *    must display the following acknowledgement:
     21      1.1  explorer  *	This product includes software developed by Charles M. Hannum.
     22      1.1  explorer  * 4. The name of the author may not be used to endorse or promote products
     23      1.1  explorer  *    derived from this software without specific prior written permission.
     24      1.1  explorer  *
     25      1.1  explorer  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     26      1.1  explorer  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     27      1.1  explorer  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     28      1.1  explorer  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     29      1.1  explorer  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     30      1.1  explorer  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     31      1.1  explorer  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     32      1.1  explorer  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     33      1.1  explorer  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     34      1.1  explorer  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     35      1.1  explorer  */
     36      1.1  explorer 
     37      1.1  explorer /*
     38      1.1  explorer  * This code was written and tested with the Addonics FlexPort 8S.
     39      1.1  explorer  * It has 8 ports, using 16650-compatible chips, sharing a single
     40      1.1  explorer  * interrupt.
     41      1.1  explorer  *
     42      1.1  explorer  * An interrupt status register exists at 0x240, according to the
     43      1.2  explorer  * skimpy documentation supplied.  It doesn't change depending on
     44      1.2  explorer  * io base address, so only one of these cards can ever be used at
     45      1.2  explorer  * a time.
     46      1.1  explorer  *
     47      1.1  explorer  * This card is different from the boca or other cards in that ports
     48      1.1  explorer  * 0..5 are from addresses 0x108..0x137, and 6..7 are from 0x200..0x20f,
     49      1.1  explorer  * making a gap that the other cards do not have.
     50      1.1  explorer  *
     51      1.1  explorer  * The addresses which are documented are 0x108, 0x1108, 0x1d08, and
     52      1.1  explorer  * 0x8508, for the base (port 0) address.
     53      1.1  explorer  *
     54  1.8.2.1     skrll  * --Michael <explorer (at) NetBSD.org> -- April 21, 2000
     55      1.1  explorer  */
     56      1.3     lukem 
     57      1.3     lukem #include <sys/cdefs.h>
     58  1.8.2.1     skrll __KERNEL_RCSID(0, "$NetBSD: addcom_isa.c,v 1.8.2.1 2004/08/03 10:47:57 skrll Exp $");
     59      1.1  explorer 
     60      1.1  explorer #include <sys/param.h>
     61      1.1  explorer #include <sys/systm.h>
     62      1.1  explorer #include <sys/device.h>
     63      1.1  explorer #include <sys/termios.h>
     64      1.1  explorer 
     65      1.1  explorer #include <machine/bus.h>
     66      1.1  explorer #include <machine/intr.h>
     67      1.1  explorer 
     68      1.1  explorer #include <dev/ic/comreg.h>
     69      1.1  explorer #include <dev/ic/comvar.h>
     70      1.1  explorer 
     71      1.1  explorer #include <dev/isa/isavar.h>
     72      1.1  explorer #include <dev/isa/com_multi.h>
     73      1.1  explorer 
     74      1.1  explorer #define	NSLAVES	8
     75      1.1  explorer 
     76      1.1  explorer /*
     77      1.2  explorer  * Grr.  This card always uses 0x420 for the status register, regardless
     78      1.2  explorer  * of io base address.
     79      1.1  explorer  */
     80      1.2  explorer #define STATUS_IOADDR	0x420
     81      1.2  explorer #define	STATUS_SIZE	8		/* May be bogus... */
     82      1.1  explorer 
     83      1.1  explorer struct addcom_softc {
     84      1.1  explorer 	struct device sc_dev;
     85      1.1  explorer 	void *sc_ih;
     86      1.1  explorer 
     87      1.1  explorer 	bus_space_tag_t sc_iot;
     88      1.1  explorer 	int sc_iobase;
     89      1.1  explorer 
     90      1.1  explorer 	int sc_alive;			/* mask of slave units attached */
     91      1.1  explorer 	void *sc_slaves[NSLAVES];	/* com device unit numbers */
     92      1.1  explorer 	bus_space_handle_t sc_slaveioh[NSLAVES];
     93      1.1  explorer 	bus_space_handle_t sc_statusioh;
     94      1.1  explorer };
     95      1.1  explorer 
     96      1.1  explorer #define SLAVE_IOBASE_OFFSET 0x108
     97      1.1  explorer static int slave_iobases[8] = {
     98      1.1  explorer 	0x108,	/* port 0, base port */
     99      1.1  explorer 	0x110,
    100      1.1  explorer 	0x118,
    101      1.1  explorer 	0x120,
    102      1.1  explorer 	0x128,
    103      1.1  explorer 	0x130,
    104      1.1  explorer 	0x200,	/* port 7, note address skip... */
    105      1.1  explorer 	0x208
    106      1.1  explorer };
    107      1.1  explorer 
    108      1.1  explorer int addcomprobe __P((struct device *, struct cfdata *, void *));
    109      1.1  explorer void addcomattach __P((struct device *, struct device *, void *));
    110      1.1  explorer int addcomintr __P((void *));
    111      1.1  explorer int addcomprint __P((void *, const char *));
    112      1.1  explorer 
    113      1.7   thorpej CFATTACH_DECL(addcom_isa, sizeof(struct addcom_softc),
    114      1.7   thorpej     addcomprobe, addcomattach, NULL, NULL);
    115      1.1  explorer 
    116      1.1  explorer int
    117      1.1  explorer addcomprobe(struct device *parent, struct cfdata *self, void *aux)
    118      1.1  explorer {
    119      1.1  explorer 	struct isa_attach_args *ia = aux;
    120      1.1  explorer 	bus_space_tag_t iot = ia->ia_iot;
    121      1.1  explorer 	bus_space_handle_t ioh;
    122      1.4   thorpej 	int i, iobase, rv = 1;
    123      1.1  explorer 
    124      1.1  explorer 	/*
    125      1.1  explorer 	 * Do the normal com probe for the first UART and assume
    126      1.1  explorer 	 * its presence, and the ability to map the other UARTS,
    127      1.1  explorer 	 * means there is a multiport board there.
    128      1.1  explorer 	 * XXX Needs more robustness.
    129      1.1  explorer 	 */
    130      1.1  explorer 
    131      1.4   thorpej 	if (ia->ia_nio < 1)
    132      1.4   thorpej 		return (0);
    133      1.4   thorpej 	if (ia->ia_nirq < 1)
    134      1.4   thorpej 		return (0);
    135      1.4   thorpej 
    136      1.4   thorpej 	if (ISA_DIRECT_CONFIG(ia))
    137      1.4   thorpej 		return (0);
    138      1.4   thorpej 
    139      1.1  explorer 	/* Disallow wildcarded i/o address. */
    140      1.4   thorpej 	if (ia->ia_io[0].ir_addr == ISACF_PORT_DEFAULT)
    141      1.1  explorer 		return (0);
    142      1.4   thorpej 	if (ia->ia_irq[0].ir_irq == ISACF_IRQ_DEFAULT)
    143      1.4   thorpej 		return (0);
    144      1.4   thorpej 
    145      1.4   thorpej 	iobase = ia->ia_io[0].ir_addr;
    146      1.1  explorer 
    147      1.1  explorer 	/* if the first port is in use as console, then it. */
    148      1.1  explorer 	if (com_is_console(iot, iobase, 0))
    149      1.1  explorer 		goto checkmappings;
    150      1.1  explorer 
    151      1.1  explorer 	if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
    152      1.1  explorer 		rv = 0;
    153      1.1  explorer 		goto out;
    154      1.1  explorer 	}
    155      1.1  explorer 	rv = comprobe1(iot, ioh);
    156      1.1  explorer 	bus_space_unmap(iot, ioh, COM_NPORTS);
    157      1.1  explorer 	if (rv == 0)
    158      1.1  explorer 		goto out;
    159      1.1  explorer 
    160      1.1  explorer checkmappings:
    161      1.1  explorer 	for (i = 1; i < NSLAVES; i++) {
    162      1.1  explorer 		iobase += slave_iobases[i] - slave_iobases[i - 1];
    163      1.1  explorer 
    164      1.1  explorer 		if (com_is_console(iot, iobase, 0))
    165      1.1  explorer 			continue;
    166      1.1  explorer 
    167      1.1  explorer 		if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
    168      1.1  explorer 			rv = 0;
    169      1.1  explorer 			goto out;
    170      1.1  explorer 		}
    171      1.1  explorer 		bus_space_unmap(iot, ioh, COM_NPORTS);
    172      1.1  explorer 	}
    173      1.1  explorer 
    174      1.1  explorer out:
    175      1.4   thorpej 	if (rv) {
    176      1.4   thorpej 		ia->ia_nio = 1;
    177      1.4   thorpej 		ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS;
    178      1.4   thorpej 
    179      1.4   thorpej 		ia->ia_nirq = 1;
    180      1.4   thorpej 
    181      1.4   thorpej 		ia->ia_niomem = 0;
    182      1.4   thorpej 		ia->ia_ndrq = 0;
    183      1.4   thorpej 	}
    184      1.1  explorer 	return (rv);
    185      1.1  explorer }
    186      1.1  explorer 
    187      1.1  explorer int
    188      1.1  explorer addcomprint(void *aux, const char *pnp)
    189      1.1  explorer {
    190      1.1  explorer 	struct commulti_attach_args *ca = aux;
    191      1.1  explorer 
    192      1.1  explorer 	if (pnp)
    193      1.8   thorpej 		aprint_normal("com at %s", pnp);
    194      1.8   thorpej 	aprint_normal(" slave %d", ca->ca_slave);
    195      1.1  explorer 	return (UNCONF);
    196      1.1  explorer }
    197      1.1  explorer 
    198      1.1  explorer void
    199      1.1  explorer addcomattach(struct device *parent, struct device *self, void *aux)
    200      1.1  explorer {
    201      1.1  explorer 	struct addcom_softc *sc = (void *)self;
    202      1.1  explorer 	struct isa_attach_args *ia = aux;
    203      1.1  explorer 	struct commulti_attach_args ca;
    204      1.1  explorer 	bus_space_tag_t iot = ia->ia_iot;
    205      1.1  explorer 	int i, iobase;
    206      1.1  explorer 
    207      1.1  explorer 	printf("\n");
    208      1.1  explorer 
    209      1.1  explorer 	sc->sc_iot = ia->ia_iot;
    210      1.4   thorpej 	sc->sc_iobase = ia->ia_io[0].ir_addr;
    211      1.1  explorer 
    212      1.2  explorer 	if (bus_space_map(iot, STATUS_IOADDR, STATUS_SIZE,
    213      1.2  explorer 			  0, &sc->sc_statusioh)) {
    214      1.2  explorer 		printf("%s: can't map status space\n", sc->sc_dev.dv_xname);
    215      1.2  explorer 		return;
    216      1.2  explorer 	}
    217      1.2  explorer 
    218      1.1  explorer 	for (i = 0; i < NSLAVES; i++) {
    219      1.1  explorer 		iobase = sc->sc_iobase
    220      1.1  explorer 			+ slave_iobases[i]
    221      1.1  explorer 			- SLAVE_IOBASE_OFFSET;
    222      1.1  explorer 		if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) &&
    223      1.1  explorer 		    bus_space_map(iot, iobase, COM_NPORTS, 0,
    224      1.1  explorer 				  &sc->sc_slaveioh[i])) {
    225      1.1  explorer 			printf("%s: can't map i/o space for slave %d\n",
    226      1.1  explorer 			       sc->sc_dev.dv_xname, i);
    227      1.1  explorer 			return;
    228      1.1  explorer 		}
    229      1.1  explorer 	}
    230      1.1  explorer 
    231      1.1  explorer 	for (i = 0; i < NSLAVES; i++) {
    232      1.1  explorer 		ca.ca_slave = i;
    233      1.1  explorer 		ca.ca_iot = sc->sc_iot;
    234      1.1  explorer 		ca.ca_ioh = sc->sc_slaveioh[i];
    235      1.1  explorer 		ca.ca_iobase = sc->sc_iobase
    236      1.1  explorer 			+ slave_iobases[i]
    237      1.1  explorer 			- SLAVE_IOBASE_OFFSET;
    238      1.1  explorer 		ca.ca_noien = 0;
    239      1.1  explorer 
    240      1.1  explorer 		sc->sc_slaves[i] = config_found(self, &ca, addcomprint);
    241      1.1  explorer 		if (sc->sc_slaves[i] != NULL)
    242      1.1  explorer 			sc->sc_alive |= 1 << i;
    243      1.1  explorer 	}
    244      1.1  explorer 
    245      1.4   thorpej 	sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq,
    246      1.4   thorpej 	    IST_EDGE, IPL_SERIAL, addcomintr, sc);
    247      1.1  explorer }
    248      1.1  explorer 
    249      1.1  explorer int
    250      1.1  explorer addcomintr(void *arg)
    251      1.1  explorer {
    252      1.1  explorer 	struct addcom_softc *sc = arg;
    253      1.1  explorer 	bus_space_tag_t iot = sc->sc_iot;
    254      1.1  explorer 	int alive = sc->sc_alive;
    255      1.1  explorer 	int bits;
    256      1.1  explorer 
    257      1.1  explorer 	bits = bus_space_read_1(iot, sc->sc_statusioh, 0) & alive;
    258      1.1  explorer 	if (bits == 0)
    259      1.1  explorer 		return (0);
    260      1.1  explorer 
    261      1.1  explorer 	for (;;) {
    262      1.1  explorer #define	TRY(n) \
    263      1.1  explorer 		if (bits & (1 << (n))) \
    264      1.1  explorer 			comintr(sc->sc_slaves[n]);
    265      1.1  explorer 		TRY(0);
    266      1.1  explorer 		TRY(1);
    267      1.1  explorer 		TRY(2);
    268      1.1  explorer 		TRY(3);
    269      1.1  explorer 		TRY(4);
    270      1.1  explorer 		TRY(5);
    271      1.1  explorer 		TRY(6);
    272      1.1  explorer 		TRY(7);
    273      1.1  explorer #undef TRY
    274      1.1  explorer 		bits = bus_space_read_1(iot, sc->sc_statusioh, 0) & alive;
    275      1.1  explorer 		if (bits == 0)
    276      1.1  explorer 			return (1);
    277      1.1  explorer  	}
    278      1.1  explorer }
    279