Return to com_obio.c CVS log

Up to [local] / sys / arch / sparc / dev

Annotation of sys/arch/sparc/dev/com_obio.c, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: com_obio.c,v 1.1 2005/07/17 12:22:42 miod Exp $       */
                      2:
                      3: /*
                      4:  * Copyright (c) 2005, Miodrag Vallat.
                      5:  *
                      6:  * Redistribution and use in source and binary forms, with or without
                      7:  * modification, are permitted provided that the following conditions
                      8:  * are met:
                      9:  * 1. Redistributions of source code must retain the above copyright
                     10:  *    notice, this list of conditions and the following disclaimer.
                     11:  * 2. Redistributions in binary form must reproduce the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer in the
                     13:  *    documentation and/or other materials provided with the distribution.
                     14:  *
                     15:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
                     16:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
                     17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
                     18:  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
                     19:  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
                     20:  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
                     21:  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     22:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
                     23:  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
                     24:  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
                     25:  * POSSIBILITY OF SUCH DAMAGE.
                     26:  */
                     27:
                     28: /*
                     29:  * Driver for the built-in modem on Tadpole SPARCbooks, which provides a
                     30:  * 16C450-compatible interface. Later models apparently are 16550A-compatible
                     31:  * (i.e. with a 16 byte FIFO).
                     32:  */
                     33:
                     34: #include <sys/types.h>
                     35: #include <sys/param.h>
                     36: #include <sys/systm.h>
                     37: #include <sys/device.h>
                     38: #include <sys/tty.h>
                     39:
                     40: #include <machine/bus.h>
                     41: #include <sparc/sparc/auxioreg.h>
                     42:
                     43: #include <dev/ic/comreg.h>
                     44: #include <dev/ic/comvar.h>
                     45:
                     46: int    com_obio_match(struct device *, void *, void *);
                     47: void   com_obio_attach(struct device *, struct device *, void *);
                     48:
                     49: struct com_obio_softc {
                     50:        struct com_softc        sc_com;
                     51:        struct intrhand         sc_ih;
                     52:        struct rom_reg          sc_reg;
                     53:        int                     sc_pwr;
                     54: };
                     55:
                     56: struct cfattach com_obio_ca = {
                     57:        sizeof(struct com_obio_softc), com_obio_match, com_obio_attach
                     58: };
                     59:
                     60: void   com_obio_disable(struct com_softc *);
                     61: int    com_obio_enable(struct com_softc *);
                     62:
                     63: int
                     64: com_obio_match(struct device *parent, void *match, void *aux)
                     65: {
                     66:        struct confargs *ca = aux;
                     67:
                     68:        return (strcmp("modem", ca->ca_ra.ra_name) == 0);
                     69: }
                     70:
                     71: void
                     72: com_obio_attach(struct device *parent, struct device *self, void *aux)
                     73: {
                     74:        struct confargs *ca = aux;
                     75:        struct com_softc *sc = (void *)self;
                     76:        struct com_obio_softc *osc = (void *)sc;
                     77:
                     78:        /* build a bus tag */
                     79:        osc->sc_reg = ca->ca_ra.ra_reg[0];
                     80:
                     81: #if 0  /* not necessary as we don't compile com console support */
                     82:        sc->sc_iobase = -1;
                     83: #endif
                     84:        sc->sc_iot = &osc->sc_reg;
                     85:
                     86:        if (ca->ca_ra.ra_nreg == 0 || bus_space_map(sc->sc_iot, 0,
                     87:            ca->ca_ra.ra_len, 0, &sc->sc_ioh) != 0) {
                     88:                printf(": can't map modem registers\n");
                     89:                return;
                     90:        }
                     91:
                     92:        osc->sc_ih.ih_fun = comintr;
                     93:        osc->sc_ih.ih_arg = sc;
                     94:        intr_establish(ca->ca_ra.ra_intr[0].int_pri, &osc->sc_ih, -1,
                     95:            self->dv_xname);
                     96:        printf(" pri %d", ca->ca_ra.ra_intr[0].int_pri);
                     97:
                     98:        sc->disable = com_obio_disable;
                     99:        sc->enable = com_obio_enable;
                    100:        osc->sc_pwr = getpropint(ca->ca_ra.ra_node, "pwr-on-auxio", 0);
                    101:        com_obio_enable(sc);
                    102:        sc->enabled = 1;
                    103:
                    104:        sc->sc_frequency = COM_FREQ;
                    105:        com_attach_subr(sc);
                    106: }
                    107:
                    108: void
                    109: com_obio_disable(struct com_softc *sc)
                    110: {
                    111:        struct com_obio_softc *osc = (void *)sc;
                    112:
                    113:        if (osc->sc_pwr) {
                    114:                sb_auxregbisc(0, 0, AUXIO_MODEM | AUXIO_MODEM_RESET);
                    115:        }
                    116: }
                    117:
                    118: int
                    119: com_obio_enable(struct com_softc *sc)
                    120: {
                    121:        struct com_obio_softc *osc = (void *)sc;
                    122:
                    123:        if (osc->sc_pwr) {
                    124:                /* enable and reset modem for 20 usec */
                    125:                sb_auxregbisc(0, AUXIO_MODEM, AUXIO_MODEM_RESET);
                    126:                delay(20);
                    127:                /* end reset (active low) */
                    128:                sb_auxregbisc(0, AUXIO_MODEM_RESET, 0);
                    129:                /* give the device some time to settle */
                    130:                delay(100);
                    131:        }
                    132:        return (0);
                    133: }