1 /* $NetBSD: com_ebus.c,v 1.36 2021/08/07 16:19:05 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 1999, 2000 Matthew R. Green
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 /*
30 * NS Super I/O PC87332VLJ "com" to ebus attachment
31 */
32
33 #include <sys/cdefs.h>
34 __KERNEL_RCSID(0, "$NetBSD: com_ebus.c,v 1.36 2021/08/07 16:19:05 thorpej Exp $");
35
36 #include <sys/types.h>
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/device.h>
40 #include <sys/tty.h>
41 #include <sys/conf.h>
42
43 #include <sys/bus.h>
44 #include <machine/autoconf.h>
45 #include <machine/openfirm.h>
46
47 #include <dev/ebus/ebusreg.h>
48 #include <dev/ebus/ebusvar.h>
49
50 #include <dev/cons.h>
51 #include <dev/ic/comvar.h>
52 #include <dev/sun/kbd_ms_ttyvar.h>
53
54 #include "kbd.h"
55 #include "ms.h"
56
57 int com_ebus_match(device_t, cfdata_t , void *);
58 void com_ebus_attach(device_t, device_t, void *);
59
60 CFATTACH_DECL_NEW(com_ebus, sizeof(struct com_softc),
61 com_ebus_match, com_ebus_attach, NULL, NULL);
62
63 static const char *com_names[] = {
64 "su",
65 "su_pnp",
66 "rsc-console",
67 NULL
68 };
69
70 int
com_ebus_match(device_t parent,cfdata_t match,void * aux)71 com_ebus_match(device_t parent, cfdata_t match, void *aux)
72 {
73 struct ebus_attach_args *ea = aux;
74 int i;
75
76 for (i = 0; com_names[i]; i++)
77 if (strcmp(ea->ea_name, com_names[i]) == 0)
78 return (1);
79
80 if (strcmp(ea->ea_name, "serial") == 0) {
81 char *compat;
82
83 /* Could be anything. */
84 compat = prom_getpropstring(ea->ea_node, "compatible");
85 if (strcmp(compat, "su16550") == 0 ||
86 strcmp(compat, "su16552") == 0 ||
87 strcmp(compat, "su") == 0 ||
88 strcmp(compat, "FJSV,su") == 0) {
89 return (1);
90 }
91 }
92 return (0);
93 }
94
95 #define BAUD_BASE (1846200)
96
97 void
com_ebus_attach(device_t parent,device_t self,void * aux)98 com_ebus_attach(device_t parent, device_t self, void *aux)
99 {
100 struct com_softc *sc = device_private(self);
101 struct ebus_attach_args *ea = aux;
102 struct kbd_ms_tty_attach_args kma;
103 #if (NKBD > 0) || (NMS > 0)
104 int maj;
105 extern const struct cdevsw com_cdevsw;
106 #endif
107 int i;
108 int com_is_input;
109 int com_is_output;
110 bus_space_handle_t ioh;
111 bus_space_tag_t iot;
112 bus_addr_t iobase;
113 int node, port;
114 char buf[32];
115
116 sc->sc_dev = self;
117 iot = ea->ea_bustag;
118 iobase = EBUS_ADDR_FROM_REG(&ea->ea_reg[0]);
119
120 /*
121 * Addresses that should be supplied by the prom:
122 * - normal com registers
123 * - ns873xx configuration registers
124 * - DMA space
125 * The `com' driver does not use DMA accesses, so we can
126 * ignore that for now. We should enable the com port in
127 * the ns873xx registers here. XXX
128 *
129 * Use the prom address if there.
130 */
131
132 if (ea->ea_nvaddr)
133 sparc_promaddr_to_handle(iot, ea->ea_vaddr[0],
134 &ioh);
135 else if (bus_space_map(iot, iobase,
136 ea->ea_reg[0].size, 0, &ioh) != 0) {
137 aprint_error(": can't map register space\n");
138 return;
139 }
140 com_init_regs(&sc->sc_regs, iot, ioh, iobase);
141
142 sc->sc_hwflags = 0;
143 sc->sc_frequency = BAUD_BASE;
144
145 for (i = 0; i < ea->ea_nintr; i++)
146 bus_intr_establish(ea->ea_bustag, ea->ea_intr[i],
147 IPL_SERIAL, comintr, sc);
148
149 kma.kmta_consdev = NULL;
150
151 /*
152 * Figure out if we're the console.
153 *
154 * The Fujitsu SPARC Enterprise M4000/M5000/M8000/M9000 has a
155 * serial port on each I/O board and a pseudo console that is
156 * redirected to one of these serial ports. The board number
157 * of the serial port in question is encoded in the "tty-port#"
158 * property of the pseudo console, so we figure out what our
159 * board number is by walking up the device tree, and check
160 * for a match.
161 */
162 node = prom_instance_to_package(prom_stdin());
163 com_is_input = (ea->ea_node == node);
164 if (OF_getprop(node, "name", buf, sizeof(buf)) > 0 &&
165 strcmp(buf, "pseudo-console") == 0) {
166 port = prom_getpropint(node, "tty-port#", -1);
167 node = OF_parent(OF_parent(ea->ea_node));
168 com_is_input = (prom_getpropint(node, "board#", -2) == port);
169 }
170
171 node = prom_instance_to_package(prom_stdout());
172 com_is_output = (ea->ea_node == node);
173 if (OF_getprop(node, "name", buf, sizeof(buf)) > 0 &&
174 strcmp(buf, "pseudo-console") == 0) {
175 port = prom_getpropint(node, "tty-port#", -1);
176 node = OF_parent(OF_parent(ea->ea_node));
177 com_is_output = (prom_getpropint(node, "board#", -2) == port);
178 }
179
180 if (com_is_input || com_is_output) {
181 struct consdev *cn_orig;
182
183 /* Record some info to attach console. */
184 if (strcmp(ea->ea_name, "rsc-console") == 0)
185 kma.kmta_baud = 115200;
186 else
187 kma.kmta_baud = 9600;
188 kma.kmta_cflag = (CREAD | CS8 | HUPCL);
189
190 /* Attach com as the console. */
191 cn_orig = cn_tab;
192 if (comcnattach(iot, iobase, kma.kmta_baud,
193 sc->sc_frequency, COM_TYPE_NORMAL, kma.kmta_cflag)) {
194 aprint_error("Error: comcnattach failed\n");
195 }
196 if (com_is_input) {
197 cn_orig->cn_dev = cn_tab->cn_dev;
198 cn_orig->cn_probe = cn_tab->cn_probe;
199 cn_orig->cn_init = cn_tab->cn_init;
200 cn_orig->cn_getc = cn_tab->cn_getc;
201 cn_orig->cn_pollc = cn_tab->cn_pollc;
202 }
203 if (com_is_output) {
204 cn_orig->cn_putc = cn_tab->cn_putc;
205 }
206 cn_tab = cn_orig;
207 kma.kmta_consdev = cn_tab;
208 }
209
210 /*
211 * Apparently shoving too much data down the TX FIFO on the
212 * Fujitsu SPARC Enterprise M4000/M5000 causes a hardware
213 * fault. Avoid this issue by setting the FIFO depth to 1.
214 * This will effectively disable the TX FIFO, but will still
215 * enable the RX FIFO, which is what we really care about.
216 */
217 if (OF_getprop(ea->ea_node, "compatible", buf, sizeof(buf)) > 0 &&
218 strcmp(buf, "FJSV,su") == 0)
219 sc->sc_fifolen = 1;
220
221 /* Now attach the driver */
222 com_attach_subr(sc);
223
224 #if (NKBD > 0) || (NMS > 0)
225 kma.kmta_tp = sc->sc_tty;
226 /* If we figure out we're the console we should point this to our consdev */
227
228 /* locate the major number */
229 maj = cdevsw_lookup_major(&com_cdevsw);
230
231 kma.kmta_dev = makedev(maj, device_unit(sc->sc_dev));
232
233 /* Attach 'em if we got 'em. */
234 #if (NKBD > 0)
235 kma.kmta_name = "keyboard";
236 if (prom_getproplen(ea->ea_node, kma.kmta_name) == 0) {
237 config_found(self, (void *)&kma, NULL, CFARGS_NONE);
238 }
239 #endif
240 #if (NMS > 0)
241 kma.kmta_name = "mouse";
242 if (prom_getproplen(ea->ea_node, kma.kmta_name) == 0) {
243 config_found(self, (void *)&kma, NULL, CFARGS_NONE);
244 }
245 #endif
246 #endif
247 if (kma.kmta_consdev) {
248 /*
249 * If we're the keyboard then we need the original
250 * cn_tab w/prom I/O, which sunkbd copied into kma.
251 * Otherwise we want conscom which we copied into
252 * kma.kmta_consdev.
253 */
254 cn_tab = kma.kmta_consdev;
255 }
256 }
257