uart_cpu_ia64.c revision 120378 
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: head/sys/dev/uart/uart_cpu_ia64.c 120378 2003-09-23 09:25:38Z nyan $");
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/bus.h>
33
34#include <machine/bootinfo.h>
35#include <machine/bus.h>
36#include <machine/dig64.h>
37#include <machine/vmparam.h>
38
39#include <dev/uart/uart.h>
40#include <dev/uart/uart_cpu.h>
41
42static int dig64_to_uart_parity[] = {
43	UART_PARITY_NONE, UART_PARITY_NONE, UART_PARITY_EVEN,
44	UART_PARITY_ODD, UART_PARITY_MARK, UART_PARITY_SPACE
45};
46
47int
48uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
49{
50
51	return ((b1->bsh == b2->bsh && b1->bst == b2->bst) ? 1 : 0);
52}
53
54int
55uart_cpu_getdev(int devtype, struct uart_devinfo *di)
56{
57	struct dig64_hcdp_table *tbl;
58	struct dig64_hcdp_entry *ent;
59	unsigned int i, ivar;
60
61	/*
62	 * Use the DIG64 HCDP table if present.
63	 */
64	if (bootinfo.bi_hcdp != 0) {
65		tbl = (void*)IA64_PHYS_TO_RR7(bootinfo.bi_hcdp);
66		for (i = 0; i < tbl->entries; i++) {
67			ent = tbl->entry + i;
68
69			if (devtype == UART_DEV_CONSOLE &&
70			    ent->type != DIG64_HCDP_CONSOLE)
71				continue;
72
73			if (devtype == UART_DEV_DBGPORT &&
74			    ent->type != DIG64_HCDP_DBGPORT)
75				continue;
76
77			di->ops = uart_ns8250_ops;
78			di->bas.iobase = (ent->address.addr_high << 32) +
79				ent->address.addr_low;
80			di->bas.bst = IA64_BUS_SPACE_IO;
81			di->bas.bst = (ent->address.addr_space == 0)
82			    ? IA64_BUS_SPACE_MEM : IA64_BUS_SPACE_IO;
83			if (bus_space_map(di->bas.bst, di->bas.iobase, 8, 0,
84					  &di->bas.bsh) != 0)
85				return (ENXIO);
86			di->bas.regshft = 0;
87			di->bas.rclk = ent->pclock << 4;
88			/* We don't deal with 64-bit baud rates. */
89			di->baudrate = ent->baud_low;
90			di->databits = ent->databits;
91			di->stopbits = ent->stopbits;
92			di->parity = (ent->parity >= 6) ? UART_PARITY_NONE
93			    : dig64_to_uart_parity[ent->parity];
94			return (0);
95		}
96
97		/* FALLTHROUGH */
98	}
99
100	/*
101	 * Scan the hints for backward compatibility. We only try units
102	 * 0 to 3 (inclusive). This covers the ISA legacy where 4 UARTs
103	 * had their resources predefined.
104	 */
105	for (i = 0; i < 4; i++) {
106		if (resource_int_value("uart", i, "flags", &ivar))
107			continue;
108		if (devtype == UART_DEV_CONSOLE && !UART_FLAGS_CONSOLE(ivar))
109			continue;
110		if (devtype == UART_DEV_DBGPORT && !UART_FLAGS_DBGPORT(ivar))
111			continue;
112		/*
113		 * We have a possible device. Make sure it's enabled and
114		 * that we have an I/O port.
115		 */
116		if (resource_int_value("uart", i, "disabled", &ivar) == 0 &&
117		    ivar != 0)
118			continue;
119		if (resource_int_value("uart", i, "port", &ivar) != 0 ||
120		    ivar == 0)
121			continue;
122		/*
123		 * Got it. Fill in the instance and return it. We only have
124		 * ns8250 and successors on i386.
125		 */
126		di->ops = uart_ns8250_ops;
127		di->bas.iobase = ivar;
128		di->bas.bst = IA64_BUS_SPACE_IO;
129		if (bus_space_map(di->bas.bst, ivar, 8, 0, &di->bas.bsh) != 0)
130			return (ENXIO);
131		di->bas.regshft = 0;
132		di->bas.rclk = 0;
133		if (resource_int_value("uart", i, "baud", &ivar) != 0)
134			ivar = 0;
135		di->baudrate = ivar;
136		di->databits = 8;
137		di->stopbits = 1;
138		di->parity = UART_PARITY_NONE;
139		return (0);
140	}
141
142	return (ENXIO);
143}
144