1 /*-
2 * Copyright (c) 2006 Kevin Lo. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
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.
12 *
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.
23 */
24
25 #include <sys/cdefs.h>
26 __FBSDID("$FreeBSD$");
27
28 #include <sys/param.h>
29 #include <sys/systm.h>
30 #include <sys/bus.h>
31 #include <sys/conf.h>
32 #include <sys/kernel.h>
33 #include <sys/module.h>
34 #include <machine/bus.h>
35 #include <sys/rman.h>
36 #include <machine/resource.h>
37
38 #include <dev/pci/pcivar.h>
39 #include <dev/ic/ns16550.h>
40
41 #include <dev/uart/uart.h>
42 #include <dev/uart/uart_bus.h>
43 #include <dev/uart/uart_cpu.h>
44
45 #include <arm/xscale/ixp425/ixp425reg.h>
46 #include <arm/xscale/ixp425/ixp425var.h>
47
48 #include "uart_if.h"
49
50 static int uart_ixp425_probe(device_t dev);
51
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),
57 { 0, 0 }
58 };
59
60 static driver_t uart_ixp425_driver = {
61 uart_driver_name,
62 uart_ixp425_methods,
63 sizeof(struct uart_softc),
64 };
65 DRIVER_MODULE(uart, ixp, uart_ixp425_driver, uart_devclass, 0, 0);
66
67 static int
uart_ixp425_probe(device_t dev)68 uart_ixp425_probe(device_t dev)
69 {
70 struct uart_softc *sc;
71 int unit = device_get_unit(dev);
72 u_int rclk;
73
74 sc = device_get_softc(dev);
75 sc->sc_class = &uart_ns8250_class;
76 if (resource_int_value("uart", unit, "rclk", &rclk))
77 rclk = IXP425_UART_FREQ;
78 if (bootverbose)
79 device_printf(dev, "rclk %u\n", rclk);
80
81 return uart_bus_probe(dev, 0, rclk, 0, 0);
82 }
83