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: head/sys/dev/uart/uart_cpu_sparc64.c 127215 2004-03-20 02:14:02Z marcel $");
29
30#include <sys/param.h>
31#include <sys/systm.h>
32
33#include <machine/bus.h>
34#include <machine/bus_private.h>
35
36#include <dev/ofw/openfirm.h>
37#include <machine/ofw_machdep.h>
38
39#include <dev/uart/uart.h>
40#include <dev/uart/uart_cpu.h>
41
42bus_space_tag_t uart_bus_space_io;
43bus_space_tag_t uart_bus_space_mem;
44
45static phandle_t uart_cpu_getdev_keyboard(phandle_t root);
46
47static struct bus_space_tag bst_store[3];
48
49static int
50uart_cpu_channel(char *dev)
51{
52 char alias[64];
53 phandle_t aliases;
54 int len;
55
56 strcpy(alias, dev);
57 if ((aliases = OF_finddevice("/aliases")) != -1)
58 OF_getprop(aliases, dev, alias, sizeof(alias));
59 len = strlen(alias);
60 if (len < 2 || alias[len - 2] != ':' || alias[len - 1] < 'a' ||
61 alias[len - 1] > 'b')
62 return (0);
63 return (alias[len - 1] - 'a' + 1);
64}
65
66int
67uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
68{
69
70 return ((b1->bsh == b2->bsh) ? 1 : 0);
71}
72
73static phandle_t
74uart_cpu_getdev_keyboard(phandle_t root)
75{
76 phandle_t child;
77 phandle_t node;
78 char buf[32];
79
80 for (child = OF_child(root); child != 0 && child != -1;
81 child = OF_peer(child)) {
82 if (OF_getprop(child, "device_type", buf, sizeof(buf)) != -1 &&
83 !strcmp(buf, "serial") &&
84 OF_getprop(child, "keyboard", buf, sizeof(buf)) != -1)
85 return (child);
86 if ((node = uart_cpu_getdev_keyboard(child)) != -1)
87 return (node);
88 }
89 return (-1);
90}
91
92int
93uart_cpu_getdev(int devtype, struct uart_devinfo *di)
94{
95 char buf[32], dev[32], compat[32];
96 phandle_t input, options, output;
97 bus_addr_t addr;
98 int baud, bits, error, space, stop;
99 char flag, par;
100
101 /*
102 * Get the address of the UART that is selected as the console, if
103 * the console is an UART of course. Note that we enforce that both
104 * stdin and stdout are selected. For weird configurations, use
105 * ofw_console(4).
106 * Note that the currently active console (ie /chosen/stdout and
107 * /chosen/stdin) may not be the same as the device selected in the
108 * environment (ie /options/output-device and /options/input-device)
109 * because the user may have changed the environment. In that case
110 * I would assume that the user expects that FreeBSD uses the new
111 * console setting. There's choice choice, really.
112 */
113 if ((options = OF_finddevice("/options")) == -1)
114 return (ENXIO);
115 if (devtype == UART_DEV_CONSOLE) {
116 if (OF_getprop(options, "input-device", dev, sizeof(dev)) == -1)
117 return (ENXIO);
118 if ((input = OF_finddevice(dev)) == -1)
119 return (ENXIO);
120 if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1)
121 return (ENXIO);
122 if (strcmp(buf, "serial"))
123 return (ENODEV);
124 if (OF_getprop(options, "output-device", buf, sizeof(buf))
125 == -1)
126 return (ENXIO);
127 if ((output = OF_finddevice(buf)) == -1)
128 return (ENXIO);
129 if (input != output)
130 return (ENXIO);
131 } else if (devtype == UART_DEV_KEYBOARD) {
132 if ((input = uart_cpu_getdev_keyboard(OF_peer(0))) == -1)
133 return (ENXIO);
134 } else
135 return (ENODEV);
136
137 error = OF_decode_addr(input, &space, &addr);
138 if (error)
139 return (error);
140
141 /* Get the device class. */
142 if (OF_getprop(input, "name", buf, sizeof(buf)) == -1)
143 return (ENXIO);
144 if (OF_getprop(input, "compatible", compat, sizeof(compat)) == -1)
145 compat[0] = '\0';
146 di->bas.regshft = 0;
147 di->bas.rclk = 0;
148 if (!strcmp(buf, "se")) {
149 di->ops = uart_sab82532_ops;
150 di->bas.chan = uart_cpu_channel(dev);
151 addr += 64 * (di->bas.chan - 1);
152 } else if (!strcmp(buf, "zs")) {
153 di->ops = uart_z8530_ops;
154 di->bas.chan = uart_cpu_channel(dev);
155 di->bas.regshft = 1;
156 addr += 4 - 4 * (di->bas.chan - 1);
157 } else if (!strcmp(buf, "su") || !strcmp(buf, "su_pnp") ||
158 !strcmp(compat, "su") || !strcmp(compat, "su16550")) {
159 di->ops = uart_ns8250_ops;
160 di->bas.chan = 0;
161 } else
162 return (ENXIO);
163
164 /* Fill in the device info. */
165 di->bas.bst = &bst_store[devtype];
166 di->bas.bsh = sparc64_fake_bustag(space, addr, di->bas.bst);
167
168 /* Get the line settings. */
169 if (devtype == UART_DEV_KEYBOARD)
170 di->baudrate = 1200;
171 else
172 di->baudrate = 9600;
173 di->databits = 8;
174 di->stopbits = 1;
175 di->parity = UART_PARITY_NONE;
176 snprintf(buf, sizeof(buf), "%s-mode", dev);
177 if (OF_getprop(options, buf, buf, sizeof(buf)) == -1)
178 return (0);
179 if (sscanf(buf, "%d,%d,%c,%d,%c", &baud, &bits, &par, &stop, &flag)
180 != 5)
181 return (0);
182 di->baudrate = baud;
183 di->databits = bits;
184 di->stopbits = stop;
185 di->parity = (par == 'n') ? UART_PARITY_NONE :
186 (par == 'o') ? UART_PARITY_ODD : UART_PARITY_EVEN;
187 return (0);
188}