1 /*-
2 * Copyright (c) 2003 Marcel Moolenaar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
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 WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD: stable/10/sys/arm/xscale/ixp425/uart_cpu_ixp425.c 170109 2007-05-29 18:10:42Z jhay $");
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/bus.h>
33 #include <sys/cons.h>
34 #include <machine/bus.h>
35
36 #include <dev/uart/uart.h>
37 #include <dev/uart/uart_cpu.h>
38
39 #include <arm/xscale/ixp425/ixp425reg.h>
40 #include <arm/xscale/ixp425/ixp425var.h>
41
42 bus_space_tag_t uart_bus_space_io;
43 bus_space_tag_t uart_bus_space_mem;
44
45 int
uart_cpu_eqres(struct uart_bas * b1,struct uart_bas * b2)46 uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
47 {
48 return ((b1->bsh == b2->bsh && b1->bst == b2->bst) ? 1 : 0);
49 }
50
51 int
uart_cpu_getdev(int devtype,struct uart_devinfo * di)52 uart_cpu_getdev(int devtype, struct uart_devinfo *di)
53 {
54 uint32_t i, ivar, vaddr;
55
56 /*
57 * Scan the hints. The IXP425 only have 2 serial ports, so only
58 * scan them.
59 */
60 for (i = 0; i < 2; i++) {
61 if (resource_int_value("uart", i, "flags", &ivar))
62 continue;
63 if (devtype == UART_DEV_CONSOLE && !UART_FLAGS_CONSOLE(ivar))
64 continue;
65 if (devtype == UART_DEV_DBGPORT && !UART_FLAGS_DBGPORT(ivar))
66 continue;
67 /*
68 * We have a possible device. Make sure it's enabled and
69 * that we have an I/O port.
70 */
71 if (resource_int_value("uart", i, "disabled", &ivar) == 0 &&
72 ivar != 0)
73 continue;
74 if (resource_int_value("uart", i, "addr", &ivar) != 0 ||
75 ivar == 0)
76 continue;
77 /* Got it. Fill in the instance and return it. */
78 di->ops = uart_getops(&uart_ns8250_class);
79 di->bas.chan = 0;
80 di->bas.bst = &ixp425_a4x_bs_tag;
81 di->bas.regshft = 0;
82 di->bas.rclk = IXP425_UART_FREQ;
83 di->baudrate = 115200;
84 di->databits = 8;
85 di->stopbits = 1;
86 di->parity = UART_PARITY_NONE;
87 uart_bus_space_io = NULL;
88 uart_bus_space_mem = &ixp425_a4x_bs_tag;
89
90 getvbase(ivar, IXP425_REG_SIZE, &vaddr);
91 di->bas.bsh = vaddr;
92 return (0);
93 }
94
95 return (ENXIO);
96 }
97