1 /*-
2 * Copyright (c) 2004 Pyun YongHyeon
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 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 */
27
28 /* $NetBSD: auxio.c,v 1.11 2003/07/15 03:36:04 lukem Exp $ */
29
30 /*-
31 * Copyright (c) 2000, 2001 Matthew R. Green
32 * All rights reserved.
33 *
34 * Redistribution and use in source and binary forms, with or without
35 * modification, are permitted provided that the following conditions
36 * are met:
37 * 1. Redistributions of source code must retain the above copyright
38 * notice, this list of conditions and the following disclaimer.
39 * 2. Redistributions in binary form must reproduce the above copyright
40 * notice, this list of conditions and the following disclaimer in the
41 * documentation and/or other materials provided with the distribution.
42 * 3. The name of the author may not be used to endorse or promote products
43 * derived from this software without specific prior written permission.
44 *
45 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
46 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
47 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
48 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
49 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
50 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
51 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
52 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
53 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
54 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
55 * SUCH DAMAGE.
56 */
57
58 /*
59 * AUXIO registers support on the SBus & EBus2, used for the floppy driver
60 * and to control the system LED, for the BLINK option.
61 */
62
63 #include <sys/cdefs.h>
64 __FBSDID("$FreeBSD$");
65
66 #include <sys/param.h>
67 #include <sys/systm.h>
68 #include <sys/bus.h>
69 #include <sys/kernel.h>
70 #include <sys/lock.h>
71 #include <sys/module.h>
72 #include <sys/mutex.h>
73 #include <sys/resource.h>
74 #include <sys/rman.h>
75
76 #include <dev/led/led.h>
77 #include <dev/ofw/ofw_bus.h>
78 #include <dev/ofw/openfirm.h>
79
80 #include <machine/bus.h>
81 #include <machine/ofw_machdep.h>
82 #include <machine/resource.h>
83
84 #include <sparc64/sbus/sbusvar.h>
85 #include <dev/auxio/auxioreg.h>
86
87 /*
88 * On sun4u, auxio exists with one register (LED) on the SBus, and 5
89 * registers on the EBus2 (pci) (LED, PCIMODE, FREQUENCY, SCSI
90 * OSCILLATOR, and TEMP SENSE.
91 */
92
93 #define AUXIO_PCIO_LED 0
94 #define AUXIO_PCIO_PCI 1
95 #define AUXIO_PCIO_FREQ 2
96 #define AUXIO_PCIO_OSC 3
97 #define AUXIO_PCIO_TEMP 4
98 #define AUXIO_PCIO_NREG 5
99
100 struct auxio_softc {
101 struct device *sc_dev;
102
103 int sc_nauxio;
104 struct resource *sc_res[AUXIO_PCIO_NREG];
105 int sc_rid[AUXIO_PCIO_NREG];
106 bus_space_tag_t sc_regt[AUXIO_PCIO_NREG];
107 bus_space_handle_t sc_regh[AUXIO_PCIO_NREG];
108 struct cdev *sc_led_dev;
109 u_int32_t sc_led_stat;
110
111 int sc_flags;
112 #define AUXIO_LEDONLY 0x1
113 #define AUXIO_EBUS 0x2
114 #define AUXIO_SBUS 0x4
115
116 struct mtx sc_lock;
117 };
118
119 static void auxio_led_func(void *arg, int onoff);
120 static int auxio_attach_common(struct auxio_softc *);
121 static int auxio_bus_probe(device_t);
122 static int auxio_sbus_attach(device_t);
123 static int auxio_ebus_attach(device_t);
124 static int auxio_bus_detach(device_t);
125 static void auxio_free_resource(struct auxio_softc *);
126 static __inline u_int32_t auxio_led_read(struct auxio_softc *);
127 static __inline void auxio_led_write(struct auxio_softc *, u_int32_t);
128
129 /* SBus */
130 static device_method_t auxio_sbus_methods[] = {
131 DEVMETHOD(device_probe, auxio_bus_probe),
132 DEVMETHOD(device_attach, auxio_sbus_attach),
133 DEVMETHOD(device_detach, auxio_bus_detach),
134
135 DEVMETHOD_END
136 };
137
138 static driver_t auxio_sbus_driver = {
139 "auxio",
140 auxio_sbus_methods,
141 sizeof(struct auxio_softc)
142 };
143
144 static devclass_t auxio_devclass;
145 /* The probe order is handled by sbus(4). */
146 EARLY_DRIVER_MODULE(auxio, sbus, auxio_sbus_driver, auxio_devclass, 0, 0,
147 BUS_PASS_DEFAULT);
148 MODULE_DEPEND(auxio, sbus, 1, 1, 1);
149
150 /* EBus */
151 static device_method_t auxio_ebus_methods[] = {
152 DEVMETHOD(device_probe, auxio_bus_probe),
153 DEVMETHOD(device_attach, auxio_ebus_attach),
154 DEVMETHOD(device_detach, auxio_bus_detach),
155
156 DEVMETHOD_END
157 };
158
159 static driver_t auxio_ebus_driver = {
160 "auxio",
161 auxio_ebus_methods,
162 sizeof(struct auxio_softc)
163 };
164
165 EARLY_DRIVER_MODULE(auxio, ebus, auxio_ebus_driver, auxio_devclass, 0, 0,
166 BUS_PASS_DEFAULT);
167 MODULE_DEPEND(auxio, ebus, 1, 1, 1);
168 MODULE_VERSION(auxio, 1);
169
170 #define AUXIO_LOCK_INIT(sc) \
171 mtx_init(&sc->sc_lock, "auxio mtx", NULL, MTX_DEF)
172 #define AUXIO_LOCK(sc) mtx_lock(&sc->sc_lock)
173 #define AUXIO_UNLOCK(sc) mtx_unlock(&sc->sc_lock)
174 #define AUXIO_LOCK_DESTROY(sc) mtx_destroy(&sc->sc_lock)
175
176 static __inline void
auxio_led_write(struct auxio_softc * sc,u_int32_t v)177 auxio_led_write(struct auxio_softc *sc, u_int32_t v)
178 {
179 if (sc->sc_flags & AUXIO_EBUS)
180 bus_space_write_4(sc->sc_regt[AUXIO_PCIO_LED],
181 sc->sc_regh[AUXIO_PCIO_LED], 0, v);
182 else
183 bus_space_write_1(sc->sc_regt[AUXIO_PCIO_LED],
184 sc->sc_regh[AUXIO_PCIO_LED], 0, v);
185 }
186
187 static __inline u_int32_t
auxio_led_read(struct auxio_softc * sc)188 auxio_led_read(struct auxio_softc *sc)
189 {
190 u_int32_t led;
191
192 if (sc->sc_flags & AUXIO_EBUS)
193 led = bus_space_read_4(sc->sc_regt[AUXIO_PCIO_LED],
194 sc->sc_regh[AUXIO_PCIO_LED], 0);
195 else
196 led = bus_space_read_1(sc->sc_regt[AUXIO_PCIO_LED],
197 sc->sc_regh[AUXIO_PCIO_LED], 0);
198
199 return (led);
200 }
201
202 static void
auxio_led_func(void * arg,int onoff)203 auxio_led_func(void *arg, int onoff)
204 {
205 struct auxio_softc *sc;
206 u_int32_t led;
207
208 sc = (struct auxio_softc *)arg;
209
210 AUXIO_LOCK(sc);
211 /*
212 * NB: We must not touch the other bits of the SBus AUXIO reg.
213 */
214 led = auxio_led_read(sc);
215 if (onoff)
216 led |= AUXIO_LED_LED;
217 else
218 led &= ~AUXIO_LED_LED;
219 auxio_led_write(sc, led);
220 AUXIO_UNLOCK(sc);
221 }
222
223 static int
auxio_bus_probe(device_t dev)224 auxio_bus_probe(device_t dev)
225 {
226 const char *name;
227
228 name = ofw_bus_get_name(dev);
229 if (strcmp("auxio", name) == 0) {
230 device_set_desc(dev, "Sun Auxiliary I/O");
231 return (0);
232 }
233
234 return (ENXIO);
235 }
236
237 static int
auxio_ebus_attach(device_t dev)238 auxio_ebus_attach(device_t dev)
239 {
240 struct auxio_softc *sc;
241
242 sc = device_get_softc(dev);
243 sc->sc_dev = dev;
244
245 AUXIO_LOCK_INIT(sc);
246 sc->sc_nauxio = AUXIO_PCIO_NREG;
247 sc->sc_flags = AUXIO_LEDONLY | AUXIO_EBUS;
248
249 return(auxio_attach_common(sc));
250 }
251
252 static int
auxio_attach_common(struct auxio_softc * sc)253 auxio_attach_common(struct auxio_softc *sc)
254 {
255 struct resource *res;
256 int i;
257
258 for (i = 0; i < sc->sc_nauxio; i++) {
259 sc->sc_rid[i] = i;
260 res = bus_alloc_resource_any(sc->sc_dev, SYS_RES_MEMORY,
261 &sc->sc_rid[i], RF_ACTIVE);
262 if (res == NULL) {
263 device_printf(sc->sc_dev,
264 "could not allocate resources\n");
265 goto attach_fail;
266 }
267 sc->sc_res[i] = res;
268 sc->sc_regt[i] = rman_get_bustag(res);
269 sc->sc_regh[i] = rman_get_bushandle(res);
270 }
271
272 sc->sc_led_stat = auxio_led_read(sc) & AUXIO_LED_LED;
273 sc->sc_led_dev = led_create(auxio_led_func, sc, "auxioled");
274 /* turn on the LED */
275 auxio_led_func(sc, 1);
276
277 return (0);
278
279 attach_fail:
280 auxio_free_resource(sc);
281
282 return (ENXIO);
283 }
284
285 static int
auxio_bus_detach(device_t dev)286 auxio_bus_detach(device_t dev)
287 {
288 struct auxio_softc *sc;
289
290 sc = device_get_softc(dev);
291 led_destroy(sc->sc_led_dev);
292 auxio_led_func(sc, sc->sc_led_stat);
293 auxio_free_resource(sc);
294
295 return (0);
296 }
297
298 static void
auxio_free_resource(struct auxio_softc * sc)299 auxio_free_resource(struct auxio_softc *sc)
300 {
301 int i;
302
303 for (i = 0; i < sc->sc_nauxio; i++)
304 if (sc->sc_res[i])
305 bus_release_resource(sc->sc_dev, SYS_RES_MEMORY,
306 sc->sc_rid[i], sc->sc_res[i]);
307 AUXIO_LOCK_DESTROY(sc);
308 }
309
310 static int
auxio_sbus_attach(device_t dev)311 auxio_sbus_attach(device_t dev)
312 {
313 struct auxio_softc *sc;
314
315 sc = device_get_softc(dev);
316 sc->sc_dev = dev;
317
318 AUXIO_LOCK_INIT(sc);
319 sc->sc_nauxio = 1;
320 sc->sc_flags = AUXIO_LEDONLY | AUXIO_SBUS;
321
322 return (auxio_attach_common(sc));
323 }
324