2 * Copyright (c) 2006 Kevin Lo. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 #include <sys/cdefs.h>
26 __FBSDID("$FreeBSD$");
28 #include <sys/param.h>
29 #include <sys/systm.h>
32 #include <sys/kernel.h>
33 #include <sys/module.h>
34 #include <machine/bus.h>
36 #include <machine/resource.h>
38 #include <dev/pci/pcivar.h>
39 #include <dev/ic/ns16550.h>
41 #include <dev/uart/uart.h>
42 #include <dev/uart/uart_bus.h>
43 #include <dev/uart/uart_cpu.h>
45 #include <arm/xscale/ixp425/ixp425reg.h>
46 #include <arm/xscale/ixp425/ixp425var.h>
50 static int uart_ixp425_probe(device_t dev);
52 static device_method_t uart_ixp425_methods[] = {
53 /* Device interface */
54 DEVMETHOD(device_probe, uart_ixp425_probe),
55 DEVMETHOD(device_attach, uart_bus_attach),
56 DEVMETHOD(device_detach, uart_bus_detach),
60 static driver_t uart_ixp425_driver = {
63 sizeof(struct uart_softc),
66 extern SLIST_HEAD(uart_devinfo_list, uart_devinfo) uart_sysdevs;
68 uart_ixp425_probe(device_t dev)
70 struct uart_softc *sc;
72 sc = device_get_softc(dev);
73 sc->sc_sysdev = SLIST_FIRST(&uart_sysdevs);
74 sc->sc_class = &uart_ns8250_class;
75 bcopy(&sc->sc_sysdev->bas, &sc->sc_bas, sizeof(sc->sc_bas));
77 * XXX set UART Unit Enable (0x40) AND
78 * receiver timeout int enable (0x10).
79 * The first turns on the UART. The second is necessary to get
80 * interrupts when the FIFO has data but is not full. Note that
81 * uart_ns8250 carefully avoids touching these bits so we can
82 * just set them here and proceed. But this is fragile...
84 bus_space_write_4(&ixp425_a4x_bs_tag,
85 device_get_unit(dev) == 0 ? IXP425_UART0_VBASE : IXP425_UART1_VBASE,
86 IXP425_UART_IER, IXP425_UART_IER_UUE | IXP425_UART_IER_RTOIE);
87 return(uart_bus_probe(dev, 0, IXP425_UART_FREQ, 0, 0));
91 DRIVER_MODULE(uart, ixp, uart_ixp425_driver, uart_devclass, 0, 0);