1/*
2 * Copyright (c) 2003 M. Warner Losh, 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 *

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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: head/sys/dev/uart/uart_cpu_pc98.c 127215 2004-03-20 02:14:02Z marcel $");
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
39bus_space_tag_t uart_bus_space_io;
40bus_space_tag_t uart_bus_space_mem;
41
42int
43uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
44{
45
46 return (0); /* XXX */
47}
48
49int
50uart_cpu_getdev(int devtype, struct uart_devinfo *di)
51{
52 unsigned int i, ivar, flags;
53
54 /* Check the environment. */
55 if (uart_getenv(devtype, di) == 0)
56 return (0);
57
58 /*
59 * There are 2 built-in serial ports on pc98 hardware. The
60 * first one is 8251 and the second one is I think an enhance
61 * version of that. However, for the sio driver, flags selected
62 * which type of uart was in the sytem. We use something similar
63 * to sort things out.
64 */
65 for (i = 0; i < 1; i++) {

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83 * Got it. Fill in the instance and return it. We have
84 * both i8251 an ns8250 and successors on pc98.
85 */
86 if (flags & 0x100)
87 di->ops = uart_ns8250_ops;
88 else
89 di->ops = uart_i8251_ops;
90 di->bas.chan = 0;
91 di->bas.bst = uart_bus_space_io;
92 if (bus_space_map(di->bas.bst, ivar, 8, 0, &di->bas.bsh) != 0)
93 continue;
94 di->bas.regshft = 0;
95 di->bas.rclk = 0;
96 if (resource_int_value("uart", i, "baud", &ivar) != 0)
97 ivar = 0;
98 di->baudrate = ivar;
99 di->databits = 8;
100 di->stopbits = 1;
101 di->parity = UART_PARITY_NONE;
102 return (0);
103 }
104
105 return (ENXIO);
106}