1 /*-
2 * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
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 as
10 * the first lines of this file unmodified.
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 AUTHORS ``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 AUTHORS 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: releng/8.1/sys/dev/atkbdc/atkbdc_isa.c 188160 2009-02-05 18:38:39Z imp $");
29
30 #include "opt_kbd.h"
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/kernel.h>
35 #include <sys/module.h>
36 #include <sys/bus.h>
37 #include <sys/malloc.h>
38 #include <machine/resource.h>
39 #include <sys/rman.h>
40 #include <machine/bus.h>
41
42 #include <dev/atkbdc/atkbdc_subr.h>
43 #include <dev/atkbdc/atkbdcreg.h>
44
45 #include <isa/isareg.h>
46 #include <isa/isavar.h>
47
48 static int atkbdc_isa_probe(device_t dev);
49 static int atkbdc_isa_attach(device_t dev);
50 static device_t atkbdc_isa_add_child(device_t bus, int order, const char *name,
51 int unit);
52
53 static device_method_t atkbdc_isa_methods[] = {
54 DEVMETHOD(device_probe, atkbdc_isa_probe),
55 DEVMETHOD(device_attach, atkbdc_isa_attach),
56 DEVMETHOD(device_suspend, bus_generic_suspend),
57 DEVMETHOD(device_resume, bus_generic_resume),
58
59 DEVMETHOD(bus_add_child, atkbdc_isa_add_child),
60 DEVMETHOD(bus_print_child, atkbdc_print_child),
61 DEVMETHOD(bus_read_ivar, atkbdc_read_ivar),
62 DEVMETHOD(bus_write_ivar, atkbdc_write_ivar),
63 DEVMETHOD(bus_get_resource_list,atkbdc_get_resource_list),
64 DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource),
65 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
66 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
67 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
68 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
69 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
70 DEVMETHOD(bus_delete_resource, bus_generic_rl_delete_resource),
71 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
72 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
73
74 { 0, 0 }
75 };
76
77 static driver_t atkbdc_isa_driver = {
78 ATKBDC_DRIVER_NAME,
79 atkbdc_isa_methods,
80 sizeof(atkbdc_softc_t *),
81 };
82
83 static struct isa_pnp_id atkbdc_ids[] = {
84 { 0x0303d041, "Keyboard controller (i8042)" }, /* PNP0303 */
85 { 0 }
86 };
87
88 static int
89 atkbdc_isa_probe(device_t dev)
90 {
91 struct resource *port0;
92 struct resource *port1;
93 u_long start;
94 u_long count;
95 int error;
96 int rid;
97 #if defined(__i386__)
98 bus_space_tag_t tag;
99 bus_space_handle_t ioh1;
100 volatile int i;
101 register_t flags;
102 #endif
103
104 /* check PnP IDs */
105 if (ISA_PNP_PROBE(device_get_parent(dev), dev, atkbdc_ids) == ENXIO)
106 return ENXIO;
107
108 device_set_desc(dev, "Keyboard controller (i8042)");
109
110 /*
111 * Adjust I/O port resources.
112 * The AT keyboard controller uses two ports (a command/data port
113 * 0x60 and a status port 0x64), which may be given to us in
114 * one resource (0x60 through 0x64) or as two separate resources
115 * (0x60 and 0x64). Some brain-damaged ACPI BIOS has reversed
116 * command/data port and status port. Furthermore, /boot/device.hints
117 * may contain just one port, 0x60. We shall adjust resource settings
118 * so that these two ports are available as two separate resources
119 * in correct order.
120 */
121 device_quiet(dev);
122 rid = 0;
123 if (bus_get_resource(dev, SYS_RES_IOPORT, rid, &start, &count) != 0)
124 return ENXIO;
125 if (start == IO_KBD + KBD_STATUS_PORT) {
126 start = IO_KBD;
127 count++;
128 }
129 if (count > 1) /* adjust the count and/or start port */
130 bus_set_resource(dev, SYS_RES_IOPORT, rid, start, 1);
131 port0 = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE);
132 if (port0 == NULL)
133 return ENXIO;
134 rid = 1;
135 if (bus_get_resource(dev, SYS_RES_IOPORT, rid, NULL, NULL) != 0)
136 bus_set_resource(dev, SYS_RES_IOPORT, 1,
137 start + KBD_STATUS_PORT, 1);
138 port1 = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE);
139 if (port1 == NULL) {
140 bus_release_resource(dev, SYS_RES_IOPORT, 0, port0);
141 return ENXIO;
142 }
143
144 #if defined(__i386__)
145 /*
146 * Check if we really have AT keyboard controller. Poll status
147 * register until we get "all clear" indication. If no such
148 * indication comes, it probably means that there is no AT
149 * keyboard controller present. Give up in such case. Check relies
150 * on the fact that reading from non-existing in/out port returns
151 * 0xff on i386. May or may not be true on other platforms.
152 */
153 tag = rman_get_bustag(port0);
154 ioh1 = rman_get_bushandle(port1);
155 flags = intr_disable();
156 for (i = 0; i != 65535; i++) {
157 if ((bus_space_read_1(tag, ioh1, 0) & 0x2) == 0)
158 break;
159 }
160 intr_restore(flags);
161 if (i == 65535) {
162 bus_release_resource(dev, SYS_RES_IOPORT, 0, port0);
163 bus_release_resource(dev, SYS_RES_IOPORT, 1, port1);
164 return ENXIO;
165 }
166 #endif
167
168 device_verbose(dev);
169
170 error = atkbdc_probe_unit(device_get_unit(dev), port0, port1);
171 if (error == 0)
172 bus_generic_probe(dev);
173
174 bus_release_resource(dev, SYS_RES_IOPORT, 0, port0);
175 bus_release_resource(dev, SYS_RES_IOPORT, 1, port1);
176
177 return error;
178 }
179
180 static int
181 atkbdc_isa_attach(device_t dev)
182 {
183 atkbdc_softc_t *sc;
184 int unit;
185 int error;
186 int rid;
187
188 unit = device_get_unit(dev);
189 sc = *(atkbdc_softc_t **)device_get_softc(dev);
190 if (sc == NULL) {
191 /*
192 * We have to maintain two copies of the kbdc_softc struct,
193 * as the low-level console needs to have access to the
194 * keyboard controller before kbdc is probed and attached.
195 * kbdc_soft[] contains the default entry for that purpose.
196 * See atkbdc.c. XXX
197 */
198 sc = atkbdc_get_softc(unit);
199 if (sc == NULL)
200 return ENOMEM;
201 }
202
203 rid = 0;
204 sc->port0 = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid,
205 RF_ACTIVE);
206 if (sc->port0 == NULL)
207 return ENXIO;
208 rid = 1;
209 sc->port1 = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid,
210 RF_ACTIVE);
211 if (sc->port1 == NULL) {
212 bus_release_resource(dev, SYS_RES_IOPORT, 0, sc->port0);
213 return ENXIO;
214 }
215
216 error = atkbdc_attach_unit(unit, sc, sc->port0, sc->port1);
217 if (error) {
218 bus_release_resource(dev, SYS_RES_IOPORT, 0, sc->port0);
219 bus_release_resource(dev, SYS_RES_IOPORT, 1, sc->port1);
220 return error;
221 }
222 *(atkbdc_softc_t **)device_get_softc(dev) = sc;
223
224 bus_generic_attach(dev);
225
226 return 0;
227 }
228
229 static device_t
230 atkbdc_isa_add_child(device_t bus, int order, const char *name, int unit)
231 {
232 atkbdc_device_t *ivar;
233 device_t child;
234 int t;
235
236 ivar = malloc(sizeof(struct atkbdc_device), M_ATKBDDEV,
237 M_NOWAIT | M_ZERO);
238 if (!ivar)
239 return NULL;
240
241 child = device_add_child_ordered(bus, order, name, unit);
242 if (child == NULL) {
243 free(ivar, M_ATKBDDEV);
244 return child;
245 }
246
247 resource_list_init(&ivar->resources);
248 ivar->rid = order;
249
250 /*
251 * If the device is not created by the PnP BIOS or ACPI,
252 * refer to device hints for IRQ.
253 */
254 if (ISA_PNP_PROBE(device_get_parent(bus), bus, atkbdc_ids) != 0) {
255 if (resource_int_value(name, unit, "irq", &t) != 0)
256 t = -1;
257 } else {
258 t = bus_get_resource_start(bus, SYS_RES_IRQ, ivar->rid);
259 }
260 if (t > 0)
261 resource_list_add(&ivar->resources, SYS_RES_IRQ, ivar->rid,
262 t, t, 1);
263
264 if (resource_disabled(name, unit))
265 device_disable(child);
266
267 device_set_ivars(child, ivar);
268
269 return child;
270 }
271
272 DRIVER_MODULE(atkbdc, isa, atkbdc_isa_driver, atkbdc_devclass, 0, 0);
273 DRIVER_MODULE(atkbdc, acpi, atkbdc_isa_driver, atkbdc_devclass, 0, 0);
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