1 /*-
2 * Copyright (c) 2003, 2004 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("$FreeBSD$");
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/bus.h>
33
34 #include <machine/bus.h>
35
36 #include <dev/uart/uart.h>
37 #include <dev/uart/uart_cpu.h>
38
39 bus_space_tag_t uart_bus_space_io = I386_BUS_SPACE_IO;
40 bus_space_tag_t uart_bus_space_mem = I386_BUS_SPACE_MEM;
41
42 int
43 uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
44 {
45
46 return ((b1->bsh == b2->bsh && b1->bst == b2->bst) ? 1 : 0);
47 }
48
49 int
50 uart_cpu_getdev(int devtype, struct uart_devinfo *di)
51 {
52 unsigned int i, ivar;
53
54 /* Check the environment. */
55 if (uart_getenv(devtype, di) == 0)
56 return (0);
57
58 /*
59 * Scan the hints. We only try units 0 to 3 (inclusive). This
60 * covers the ISA legacy where 4 UARTs had their resources
61 * predefined.
62 */
63 for (i = 0; i < 4; i++) {
64 if (resource_int_value("uart", i, "flags", &ivar))
65 continue;
66 if (devtype == UART_DEV_CONSOLE && !UART_FLAGS_CONSOLE(ivar))
67 continue;
68 if (devtype == UART_DEV_DBGPORT && !UART_FLAGS_DBGPORT(ivar))
69 continue;
70 /*
71 * We have a possible device. Make sure it's enabled and
72 * that we have an I/O port.
73 */
74 if (resource_int_value("uart", i, "disabled", &ivar) == 0 &&
75 ivar != 0)
76 continue;
77 if (resource_int_value("uart", i, "port", &ivar) != 0 ||
78 ivar == 0)
79 continue;
80 /*
81 * Got it. Fill in the instance and return it. We only have
82 * ns8250 and successors on i386.
83 */
84 di->ops = uart_ns8250_ops;
85 di->bas.chan = 0;
86 di->bas.bst = uart_bus_space_io;
87 if (bus_space_map(di->bas.bst, ivar, 8, 0, &di->bas.bsh) != 0)
88 continue;
89 di->bas.regshft = 0;
90 di->bas.rclk = 0;
91 if (resource_int_value("uart", i, "baud", &ivar) != 0)
92 ivar = 0;
93 di->baudrate = ivar;
94 di->databits = 8;
95 di->stopbits = 1;
96 di->parity = UART_PARITY_NONE;
97 return (0);
98 }
99
100 return (ENXIO);
101 }
102
103 void
104 uart_cpu_identify(driver_t *driver, device_t parent)
105 {
106
107 }
Cache object: ce367387917111af8bef94cf818aa9bb
|