1 /* $OpenBSD: com_ebus.c,v 1.25 2021/10/24 17:05:03 mpi Exp $ */
2 /* $NetBSD: com_ebus.c,v 1.6 2001/07/24 19:27:10 eeh Exp $ */
3
4 /*
5 * Copyright (c) 1999, 2000 Matthew R. Green
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
22 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
24 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 /*
31 * NS Super I/O PC87332VLJ "com" to ebus attachment
32 */
33
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/device.h>
37 #include <sys/tty.h>
38 #include <sys/conf.h>
39
40 #include <machine/bus.h>
41 #include <machine/autoconf.h>
42 #include <machine/openfirm.h>
43
44 #include <sparc64/dev/ebusreg.h>
45 #include <sparc64/dev/ebusvar.h>
46
47 #include <dev/cons.h>
48 #include <dev/ic/comvar.h>
49
50 cdev_decl(com); /* XXX this belongs elsewhere */
51
52 int com_ebus_match(struct device *, void *, void *);
53 void com_ebus_attach(struct device *, struct device *, void *);
54 int com_ebus_speed(struct ebus_attach_args *);
55
56 const struct cfattach com_ebus_ca = {
57 sizeof(struct com_softc), com_ebus_match, com_ebus_attach
58 };
59
60 static char *com_names[] = {
61 "su",
62 "su_pnp",
63 "rsc-console",
64 "lom-console",
65 NULL
66 };
67
68 static inline int
com_match_ikkaku(void)69 com_match_ikkaku(void)
70 {
71 char model[80];
72 int i;
73
74 i = OF_getproplen(findroot(), "model");
75 if (i == 0)
76 return (0);
77 if (OF_getprop(findroot(), "model", model, sizeof(model)) != i)
78 return (0);
79
80 return (strcmp(model, "IKKAKU") == 0);
81 }
82
83 int
com_ebus_match(struct device * parent,void * match,void * aux)84 com_ebus_match(struct device *parent, void *match, void *aux)
85 {
86 struct ebus_attach_args *ea = aux;
87 int i;
88
89 for (i=0; com_names[i]; i++)
90 if (strcmp(ea->ea_name, com_names[i]) == 0)
91 return (1);
92
93 if (strcmp(ea->ea_name, "serial") == 0) {
94 char compat[80];
95
96 /* blacklist com on m3000s because it causes hardware faults */
97 if (com_match_ikkaku())
98 return (0);
99
100 /* Could be anything. */
101 if ((i = OF_getproplen(ea->ea_node, "compatible")) &&
102 OF_getprop(ea->ea_node, "compatible", compat,
103 sizeof(compat)) == i) {
104 if (strcmp(compat, "su16552") == 0 ||
105 strcmp(compat, "su16550") == 0 ||
106 strcmp(compat, "FJSV,su") == 0 ||
107 strcmp(compat, "su") == 0) {
108 return (1);
109 }
110 }
111 }
112 return (0);
113 }
114
115 /* XXXART - was 1846200 */
116 #define BAUD_BASE (1843200)
117
118 void
com_ebus_attach(struct device * parent,struct device * self,void * aux)119 com_ebus_attach(struct device *parent, struct device *self, void *aux)
120 {
121 struct com_softc *sc = (void *)self;
122 struct ebus_attach_args *ea = aux;
123 int i, com_is_input, com_is_output;
124 int node, port;
125 char buf[32];
126
127 sc->sc_iobase = EBUS_PADDR_FROM_REG(&ea->ea_regs[0]);
128 /*
129 * Addresses that should be supplied by the prom:
130 * - normal com registers
131 * - ns873xx configuration registers
132 * - DMA space
133 * The `com' driver does not use DMA accesses, so we can
134 * ignore that for now. We should enable the com port in
135 * the ns873xx registers here. XXX
136 *
137 * Use the prom address if there.
138 */
139 if (ea->ea_nvaddrs) {
140 if (bus_space_map(ea->ea_memtag, ea->ea_vaddrs[0], 0,
141 BUS_SPACE_MAP_PROMADDRESS, &sc->sc_ioh) != 0) {
142 printf(": can't map register space\n");
143 return;
144 }
145 sc->sc_iot = ea->ea_memtag;
146 } else if (ebus_bus_map(ea->ea_memtag, 0,
147 EBUS_PADDR_FROM_REG(&ea->ea_regs[0]),
148 ea->ea_regs[0].size, 0, 0, &sc->sc_ioh) == 0) {
149 sc->sc_iot = ea->ea_memtag;
150 } else if (ebus_bus_map(ea->ea_iotag, 0,
151 EBUS_PADDR_FROM_REG(&ea->ea_regs[0]),
152 ea->ea_regs[0].size, 0, 0, &sc->sc_ioh) == 0) {
153 sc->sc_iot = ea->ea_iotag;
154 } else {
155 printf(": can't map register space\n");
156 return;
157 }
158 sc->sc_hwflags = 0;
159 sc->sc_swflags = 0;
160 sc->sc_frequency = BAUD_BASE;
161
162 for (i = 0; i < ea->ea_nintrs; i++)
163 bus_intr_establish(sc->sc_iot, ea->ea_intrs[i],
164 IPL_TTY, 0, comintr, sc, self->dv_xname);
165
166 /*
167 * Figure out if we're the console.
168 *
169 * The Fujitsu SPARC Enterprise M4000/M5000/M8000/M9000 has a
170 * serial port on each I/O board and a pseudo console that is
171 * redirected to one of these serial ports. The board number
172 * of the serial port in question is encoded in the "tty-port#"
173 * property of the pseudo console, so we figure out what our
174 * board number is by walking up the device tree, and check
175 * for a match.
176 */
177
178 node = OF_instance_to_package(OF_stdin());
179 com_is_input = (ea->ea_node == node);
180 if (OF_getprop(node, "name", buf, sizeof(buf)) > 0 &&
181 strcmp(buf, "pseudo-console") == 0) {
182 port = getpropint(node, "tty-port#", -1);
183 node = OF_parent(OF_parent(ea->ea_node));
184 com_is_input = (getpropint(node, "board#", -2) == port);
185 }
186
187 node = OF_instance_to_package(OF_stdout());
188 com_is_output = (ea->ea_node == node);
189 if (OF_getprop(node, "name", buf, sizeof(buf)) > 0 &&
190 strcmp(buf, "pseudo-console") == 0) {
191 port = getpropint(node, "tty-port#", -1);
192 node = OF_parent(OF_parent(ea->ea_node));
193 com_is_output = (getpropint(node, "board#", -2) == port);
194 }
195
196 if (com_is_input || com_is_output) {
197 struct consdev *cn_orig;
198 int speed;
199
200 speed = com_ebus_speed(ea);
201
202 comconsioh = sc->sc_ioh;
203 cn_orig = cn_tab;
204 /* Attach com as the console. */
205 if (comcnattach(sc->sc_iot, sc->sc_iobase, speed,
206 sc->sc_frequency,
207 ((TTYDEF_CFLAG & ~(CSIZE | PARENB))|CREAD | CS8 | HUPCL))) {
208 printf("Error: comcnattach failed\n");
209 }
210 cn_tab = cn_orig;
211 if (com_is_input) {
212 cn_tab->cn_dev = /*XXX*/makedev(36, sc->sc_dev.dv_unit);
213 cn_tab->cn_probe = comcnprobe;
214 cn_tab->cn_init = comcninit;
215 cn_tab->cn_getc = comcngetc;
216 cn_tab->cn_pollc = comcnpollc;
217 }
218 if (com_is_output)
219 cn_tab->cn_putc = comcnputc;
220 }
221
222 /*
223 * Apparently shoving too much data down the TX FIFO on the
224 * Fujitsu SPARC Enterprise M4000/M5000 causes a hardware
225 * fault. Avoid this issue by setting the FIFO depth to 1.
226 * This will effectively disable the TX FIFO, but will still
227 * enable the RX FIFO, which is what we really care about.
228 */
229 if (OF_getprop(ea->ea_node, "compatible", buf, sizeof(buf)) > 0 &&
230 strcmp(buf, "FJSV,su") == 0)
231 sc->sc_uarttype = COM_UART_16550;
232
233 if (OF_getproplen(ea->ea_node, "keyboard") == 0)
234 printf(": keyboard");
235 else if (OF_getproplen(ea->ea_node, "mouse") == 0)
236 printf(": mouse");
237
238 /* Now attach the driver */
239 com_attach_subr(sc);
240 }
241
242 int
com_ebus_speed(struct ebus_attach_args * ea)243 com_ebus_speed(struct ebus_attach_args *ea)
244 {
245 char buf[128];
246 char *name = NULL;
247 int aliases, options;
248
249 if (strcmp(ea->ea_name, "rsc-console") == 0)
250 return 115200;
251
252 aliases = OF_finddevice("/aliases");
253 if (OF_getprop(aliases, "ttya", buf, sizeof(buf)) != -1 &&
254 OF_finddevice(buf) == ea->ea_node)
255 name = "ttya-mode";
256 if (OF_getprop(aliases, "ttyb", buf, sizeof(buf)) != -1 &&
257 OF_finddevice(buf) == ea->ea_node)
258 name = "ttyb-mode";
259
260 if (name == NULL)
261 return TTYDEF_SPEED;
262
263 options = OF_finddevice("/options");
264 return (getpropspeed(options, name));
265 }
266