diff options
Diffstat (limited to 'sys/arch/sparc/dev/com_obio.c')
| -rw-r--r-- | sys/arch/sparc/dev/com_obio.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/sys/arch/sparc/dev/com_obio.c b/sys/arch/sparc/dev/com_obio.c new file mode 100644 index 00000000000..a50c366fa76 --- /dev/null +++ b/sys/arch/sparc/dev/com_obio.c @@ -0,0 +1,133 @@ +/* $OpenBSD: com_obio.c,v 1.1 2005/07/17 12:22:42 miod Exp $ */ + +/* + * Copyright (c) 2005, Miodrag Vallat. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +/* + * Driver for the built-in modem on Tadpole SPARCbooks, which provides a + * 16C450-compatible interface. Later models apparently are 16550A-compatible + * (i.e. with a 16 byte FIFO). + */ + +#include <sys/types.h> +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/device.h> +#include <sys/tty.h> + +#include <machine/bus.h> +#include <sparc/sparc/auxioreg.h> + +#include <dev/ic/comreg.h> +#include <dev/ic/comvar.h> + +int com_obio_match(struct device *, void *, void *); +void com_obio_attach(struct device *, struct device *, void *); + +struct com_obio_softc { + struct com_softc sc_com; + struct intrhand sc_ih; + struct rom_reg sc_reg; + int sc_pwr; +}; + +struct cfattach com_obio_ca = { + sizeof(struct com_obio_softc), com_obio_match, com_obio_attach +}; + +void com_obio_disable(struct com_softc *); +int com_obio_enable(struct com_softc *); + +int +com_obio_match(struct device *parent, void *match, void *aux) +{ + struct confargs *ca = aux; + + return (strcmp("modem", ca->ca_ra.ra_name) == 0); +} + +void +com_obio_attach(struct device *parent, struct device *self, void *aux) +{ + struct confargs *ca = aux; + struct com_softc *sc = (void *)self; + struct com_obio_softc *osc = (void *)sc; + + /* build a bus tag */ + osc->sc_reg = ca->ca_ra.ra_reg[0]; + +#if 0 /* not necessary as we don't compile com console support */ + sc->sc_iobase = -1; +#endif + sc->sc_iot = &osc->sc_reg; + + if (ca->ca_ra.ra_nreg == 0 || bus_space_map(sc->sc_iot, 0, + ca->ca_ra.ra_len, 0, &sc->sc_ioh) != 0) { + printf(": can't map modem registers\n"); + return; + } + + osc->sc_ih.ih_fun = comintr; + osc->sc_ih.ih_arg = sc; + intr_establish(ca->ca_ra.ra_intr[0].int_pri, &osc->sc_ih, -1, + self->dv_xname); + printf(" pri %d", ca->ca_ra.ra_intr[0].int_pri); + + sc->disable = com_obio_disable; + sc->enable = com_obio_enable; + osc->sc_pwr = getpropint(ca->ca_ra.ra_node, "pwr-on-auxio", 0); + com_obio_enable(sc); + sc->enabled = 1; + + sc->sc_frequency = COM_FREQ; + com_attach_subr(sc); +} + +void +com_obio_disable(struct com_softc *sc) +{ + struct com_obio_softc *osc = (void *)sc; + + if (osc->sc_pwr) { + sb_auxregbisc(0, 0, AUXIO_MODEM | AUXIO_MODEM_RESET); + } +} + +int +com_obio_enable(struct com_softc *sc) +{ + struct com_obio_softc *osc = (void *)sc; + + if (osc->sc_pwr) { + /* enable and reset modem for 20 usec */ + sb_auxregbisc(0, AUXIO_MODEM, AUXIO_MODEM_RESET); + delay(20); + /* end reset (active low) */ + sb_auxregbisc(0, AUXIO_MODEM_RESET, 0); + /* give the device some time to settle */ + delay(100); + } + return (0); +} |