diff options
author | marcel <marcel@FreeBSD.org> | 2006-03-30 18:33:22 +0000 |
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committer | marcel <marcel@FreeBSD.org> | 2006-03-30 18:33:22 +0000 |
commit | 0215f8085c24d9281307a8a89dd8c19cbd285316 (patch) | |
tree | ff21d0075279ad6ded4c713484bf0d885479f663 /sys/dev/uart/uart_bus_scc.c | |
parent | 2801d7e75db117349d0c242e9d29ce4976370bbc (diff) | |
download | FreeBSD-src-0215f8085c24d9281307a8a89dd8c19cbd285316.zip FreeBSD-src-0215f8085c24d9281307a8a89dd8c19cbd285316.tar.gz |
Add scc(4), a driver for serial communications controllers. These
controllers typically have multiple channels and support a number
of serial communications protocols. The scc(4) driver is itself
an umbrella driver that delegates the control over each channel
and mode to a subordinate driver (like uart(4)).
The scc(4) driver supports the Siemens SAB 82532 and the Zilog
Z8530 and replaces puc(4) for these devices.
Diffstat (limited to 'sys/dev/uart/uart_bus_scc.c')
-rw-r--r-- | sys/dev/uart/uart_bus_scc.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/sys/dev/uart/uart_bus_scc.c b/sys/dev/uart/uart_bus_scc.c new file mode 100644 index 0000000..9fdcb8b --- /dev/null +++ b/sys/dev/uart/uart_bus_scc.c @@ -0,0 +1,115 @@ +/*- + * Copyright (c) 2004-2006 Marcel Moolenaar + * All rights reserved. + * + * 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. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/bus.h> +#include <sys/conf.h> +#include <sys/kernel.h> +#include <sys/module.h> + +#include <machine/bus.h> +#include <sys/rman.h> +#include <machine/resource.h> + +#include <dev/scc/scc_bus.h> + +#include <dev/uart/uart.h> +#include <dev/uart/uart_bus.h> + +static int uart_scc_attach(device_t dev); +static int uart_scc_probe(device_t dev); + +static device_method_t uart_scc_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, uart_scc_probe), + DEVMETHOD(device_attach, uart_scc_attach), + DEVMETHOD(device_detach, uart_bus_detach), + /* Serdev interface */ + DEVMETHOD(serdev_ihand, uart_bus_ihand), + DEVMETHOD(serdev_sysdev, uart_bus_sysdev), + { 0, 0 } +}; + +static driver_t uart_scc_driver = { + uart_driver_name, + uart_scc_methods, + sizeof(struct uart_softc), +}; + +static int +uart_scc_attach(device_t dev) +{ + device_t parent; + struct uart_softc *sc; + uintptr_t mtx; + + parent = device_get_parent(dev); + sc = device_get_softc(dev); + + if (BUS_READ_IVAR(parent, dev, SCC_IVAR_HWMTX, &mtx)) + return (ENXIO); + sc->sc_hwmtx = (struct mtx *)(void *)mtx; + return (uart_bus_attach(dev)); +} + +static int +uart_scc_probe(device_t dev) +{ + device_t parent; + struct uart_softc *sc; + uintptr_t ch, cl, md, rs; + + parent = device_get_parent(dev); + sc = device_get_softc(dev); + + if (BUS_READ_IVAR(parent, dev, SCC_IVAR_MODE, &md) || + BUS_READ_IVAR(parent, dev, SCC_IVAR_CLASS, &cl)) + return (ENXIO); + if (md != SCC_MODE_ASYNC) + return (ENXIO); + switch (cl) { + case SCC_CLASS_SAB82532: + sc->sc_class = &uart_sab82532_class; + break; + case SCC_CLASS_Z8530: + sc->sc_class = &uart_z8530_class; + break; + default: + return (ENXIO); + } + if (BUS_READ_IVAR(parent, dev, SCC_IVAR_CHANNEL, &ch) || + BUS_READ_IVAR(parent, dev, SCC_IVAR_CLOCK, &cl) || + BUS_READ_IVAR(parent, dev, SCC_IVAR_REGSHFT, &rs)) + return (ENXIO); + + return (uart_bus_probe(dev, rs, cl, 0, ch)); +} + +DRIVER_MODULE(uart, scc, uart_scc_driver, uart_devclass, 0, 0); |