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acpi - Incidental MPSAFE
[dragonfly.git] / sys / dev / acpica / acpi_hp / acpi_hp.c
blob8a44a4424a1c3d26e1e597c7a04e9a202dd64c6f
1 /*-
2 * Copyright (c) 2009 Michael Gmelin <freebsd@grem.de>
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 * $FreeBSD: src/sys/dev/acpi_support/acpi_hp.c,v 1.7 2010/09/11 08:09:14 avg Exp $
27 */
28
29 /*
30 * Driver for extra ACPI-controlled features found on HP laptops
31 * that use a WMI enabled BIOS (e.g. HP Compaq 8510p and 6510p).
32 * Allows to control and read status of integrated hardware and read
33 * BIOS settings through CMI.
34 * Inspired by the hp-wmi driver, which implements a subset of these
35 * features (hotkeys) on Linux.
36 *
37 * HP CMI whitepaper:
38 * http://h20331.www2.hp.com/Hpsub/downloads/cmi_whitepaper.pdf
39 * wmi-hp for Linux:
40 * http://www.kernel.org
41 * WMI and ACPI:
42 * http://www.microsoft.com/whdc/system/pnppwr/wmi/wmi-acpi.mspx
43 */
44
45 #include "opt_acpi.h"
46 #include <sys/param.h>
47 #include <sys/conf.h>
48 #include <sys/uio.h>
49 #include <sys/proc.h>
50 #include <sys/kernel.h>
51 #include <sys/bus.h>
52 #include <sys/sbuf.h>
53 #include <sys/module.h>
54 #include <sys/sysctl.h>
55 #include <sys/device.h>
56
57 #include "acpi.h"
58 #include "accommon.h"
59 #include <dev/acpica/acpivar.h>
60 #include "acpi_wmi_if.h"
61
62 #define _COMPONENT ACPI_OEM
63 ACPI_MODULE_NAME("HP")
64
65 #define ACPI_HP_WMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C"
66 #define ACPI_HP_WMI_BIOS_GUID "5FB7F034-2C63-45E9-BE91-3D44E2C707E4"
67 #define ACPI_HP_WMI_CMI_GUID "2D114B49-2DFB-4130-B8FE-4A3C09E75133"
68
69 #define ACPI_HP_WMI_DISPLAY_COMMAND 0x1
70 #define ACPI_HP_WMI_HDDTEMP_COMMAND 0x2
71 #define ACPI_HP_WMI_ALS_COMMAND 0x3
72 #define ACPI_HP_WMI_DOCK_COMMAND 0x4
73 #define ACPI_HP_WMI_WIRELESS_COMMAND 0x5
74
75 #define ACPI_HP_METHOD_WLAN_ENABLED 1
76 #define ACPI_HP_METHOD_WLAN_RADIO 2
77 #define ACPI_HP_METHOD_WLAN_ON_AIR 3
78 #define ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON 4
79 #define ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF 5
80 #define ACPI_HP_METHOD_BLUETOOTH_ENABLED 6
81 #define ACPI_HP_METHOD_BLUETOOTH_RADIO 7
82 #define ACPI_HP_METHOD_BLUETOOTH_ON_AIR 8
83 #define ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON 9
84 #define ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF 10
85 #define ACPI_HP_METHOD_WWAN_ENABLED 11
86 #define ACPI_HP_METHOD_WWAN_RADIO 12
87 #define ACPI_HP_METHOD_WWAN_ON_AIR 13
88 #define ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON 14
89 #define ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF 15
90 #define ACPI_HP_METHOD_ALS 16
91 #define ACPI_HP_METHOD_DISPLAY 17
92 #define ACPI_HP_METHOD_HDDTEMP 18
93 #define ACPI_HP_METHOD_DOCK 19
94 #define ACPI_HP_METHOD_CMI_DETAIL 20
95 #define ACPI_HP_METHOD_VERBOSE 21
96
97 #define HP_MASK_WWAN_ON_AIR 0x1000000
98 #define HP_MASK_BLUETOOTH_ON_AIR 0x10000
99 #define HP_MASK_WLAN_ON_AIR 0x100
100 #define HP_MASK_WWAN_RADIO 0x8000000
101 #define HP_MASK_BLUETOOTH_RADIO 0x80000
102 #define HP_MASK_WLAN_RADIO 0x800
103 #define HP_MASK_WWAN_ENABLED 0x2000000
104 #define HP_MASK_BLUETOOTH_ENABLED 0x20000
105 #define HP_MASK_WLAN_ENABLED 0x200
106
107 #define ACPI_HP_CMI_DETAIL_PATHS 0x01
108 #define ACPI_HP_CMI_DETAIL_ENUMS 0x02
109 #define ACPI_HP_CMI_DETAIL_FLAGS 0x04
110 #define ACPI_HP_CMI_DETAIL_SHOW_MAX_INSTANCE 0x08
111
112 struct acpi_hp_inst_seq_pair {
113 UINT32 sequence; /* sequence number as suggested by cmi bios */
114 UINT8 instance; /* object instance on guid */
115 };
116
117 struct acpi_hp_softc {
118 device_t dev;
119 device_t wmi_dev;
120 int has_notify; /* notification GUID found */
121 int has_cmi; /* CMI GUID found */
122 int cmi_detail; /* CMI detail level
123 (set by sysctl) */
124 int verbose; /* add debug output */
125 int wlan_enable_if_radio_on; /* set by sysctl */
126 int wlan_disable_if_radio_off; /* set by sysctl */
127 int bluetooth_enable_if_radio_on; /* set by sysctl */
128 int bluetooth_disable_if_radio_off; /* set by sysctl */
129 int wwan_enable_if_radio_on; /* set by sysctl */
130 int wwan_disable_if_radio_off; /* set by sysctl */
131 int was_wlan_on_air; /* last known WLAN
132 on air status */
133 int was_bluetooth_on_air; /* last known BT
134 on air status */
135 int was_wwan_on_air; /* last known WWAN
136 on air status */
137 struct sysctl_ctx_list sysctl_ctx;
138 struct sysctl_oid *sysctl_tree;
139 struct cdev *hpcmi_dev_t; /* hpcmi device handle */
140 struct sbuf hpcmi_sbuf; /* /dev/hpcmi output sbuf */
141 pid_t hpcmi_open_pid; /* pid operating on
142 /dev/hpcmi */
143 int hpcmi_bufptr; /* current pointer position
144 in /dev/hpcmi output buffer
145 */
146 int cmi_order_size; /* size of cmi_order list */
147 struct acpi_hp_inst_seq_pair cmi_order[128]; /* list of CMI
148 instances ordered by BIOS suggested sequence */
149 };
150
151 static struct {
152 char *name;
153 int method;
154 char *description;
155 int access;
156 } acpi_hp_sysctls[] = {
157 {
158 .name = "wlan_enabled",
159 .method = ACPI_HP_METHOD_WLAN_ENABLED,
160 .description = "Enable/Disable WLAN (WiFi)",
161 .access = CTLTYPE_INT | CTLFLAG_RW
162 },
163 {
164 .name = "wlan_radio",
165 .method = ACPI_HP_METHOD_WLAN_RADIO,
166 .description = "WLAN radio status",
167 .access = CTLTYPE_INT | CTLFLAG_RD
168 },
169 {
170 .name = "wlan_on_air",
171 .method = ACPI_HP_METHOD_WLAN_ON_AIR,
172 .description = "WLAN radio ready to use (enabled and radio)",
173 .access = CTLTYPE_INT | CTLFLAG_RD
174 },
175 {
176 .name = "wlan_enable_if_radio_on",
177 .method = ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON,
178 .description = "Enable WLAN if radio is turned on",
179 .access = CTLTYPE_INT | CTLFLAG_RW
180 },
181 {
182 .name = "wlan_disable_if_radio_off",
183 .method = ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF,
184 .description = "Disable WLAN if radio is turned off",
185 .access = CTLTYPE_INT | CTLFLAG_RW
186 },
187 {
188 .name = "bt_enabled",
189 .method = ACPI_HP_METHOD_BLUETOOTH_ENABLED,
190 .description = "Enable/Disable Bluetooth",
191 .access = CTLTYPE_INT | CTLFLAG_RW
192 },
193 {
194 .name = "bt_radio",
195 .method = ACPI_HP_METHOD_BLUETOOTH_RADIO,
196 .description = "Bluetooth radio status",
197 .access = CTLTYPE_INT | CTLFLAG_RD
198 },
199 {
200 .name = "bt_on_air",
201 .method = ACPI_HP_METHOD_BLUETOOTH_ON_AIR,
202 .description = "Bluetooth radio ready to use"
203 " (enabled and radio)",
204 .access = CTLTYPE_INT | CTLFLAG_RD
205 },
206 {
207 .name = "bt_enable_if_radio_on",
208 .method = ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON,
209 .description = "Enable bluetooth if radio is turned on",
210 .access = CTLTYPE_INT | CTLFLAG_RW
211 },
212 {
213 .name = "bt_disable_if_radio_off",
214 .method = ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF,
215 .description = "Disable bluetooth if radio is turned off",
216 .access = CTLTYPE_INT | CTLFLAG_RW
217 },
218 {
219 .name = "wwan_enabled",
220 .method = ACPI_HP_METHOD_WWAN_ENABLED,
221 .description = "Enable/Disable WWAN (UMTS)",
222 .access = CTLTYPE_INT | CTLFLAG_RW
223 },
224 {
225 .name = "wwan_radio",
226 .method = ACPI_HP_METHOD_WWAN_RADIO,
227 .description = "WWAN radio status",
228 .access = CTLTYPE_INT | CTLFLAG_RD
229 },
230 {
231 .name = "wwan_on_air",
232 .method = ACPI_HP_METHOD_WWAN_ON_AIR,
233 .description = "WWAN radio ready to use (enabled and radio)",
234 .access = CTLTYPE_INT | CTLFLAG_RD
235 },
236 {
237 .name = "wwan_enable_if_radio_on",
238 .method = ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON,
239 .description = "Enable WWAN if radio is turned on",
240 .access = CTLTYPE_INT | CTLFLAG_RW
241 },
242 {
243 .name = "wwan_disable_if_radio_off",
244 .method = ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF,
245 .description = "Disable WWAN if radio is turned off",
246 .access = CTLTYPE_INT | CTLFLAG_RW
247 },
248 {
249 .name = "als_enabled",
250 .method = ACPI_HP_METHOD_ALS,
251 .description = "Enable/Disable ALS (Ambient light sensor)",
252 .access = CTLTYPE_INT | CTLFLAG_RW
253 },
254 {
255 .name = "display",
256 .method = ACPI_HP_METHOD_DISPLAY,
257 .description = "Display status",
258 .access = CTLTYPE_INT | CTLFLAG_RD
259 },
260 {
261 .name = "hdd_temperature",
262 .method = ACPI_HP_METHOD_HDDTEMP,
263 .description = "HDD temperature",
264 .access = CTLTYPE_INT | CTLFLAG_RD
265 },
266 {
267 .name = "is_docked",
268 .method = ACPI_HP_METHOD_DOCK,
269 .description = "Docking station status",
270 .access = CTLTYPE_INT | CTLFLAG_RD
271 },
272 {
273 .name = "cmi_detail",
274 .method = ACPI_HP_METHOD_CMI_DETAIL,
275 .description = "Details shown in CMI output "
276 "(cat /dev/hpcmi)",
277 .access = CTLTYPE_INT | CTLFLAG_RW
278 },
279 {
280 .name = "verbose",
281 .method = ACPI_HP_METHOD_VERBOSE,
282 .description = "Verbosity level",
283 .access = CTLTYPE_INT | CTLFLAG_RW
284 },
285
286 { NULL, 0, NULL, 0 }
287 };
288
289 ACPI_SERIAL_DECL(hp, "HP ACPI-WMI Mapping");
290
291 static void acpi_hp_identify(driver_t *driver, device_t parent);
292 static int acpi_hp_probe(device_t dev);
293 static int acpi_hp_attach(device_t dev);
294 static int acpi_hp_detach(device_t dev);
295
296 static void acpi_hp_evaluate_auto_on_off(struct acpi_hp_softc* sc);
297 static int acpi_hp_sysctl(SYSCTL_HANDLER_ARGS);
298 static int acpi_hp_sysctl_set(struct acpi_hp_softc *sc, int method,
299 int arg, int oldarg);
300 static int acpi_hp_sysctl_get(struct acpi_hp_softc *sc, int method);
301 static int acpi_hp_exec_wmi_command(device_t wmi_dev, int command,
302 int is_write, int val);
303 static void acpi_hp_notify(ACPI_HANDLE h, UINT32 notify, void *context);
304 static int acpi_hp_get_cmi_block(device_t wmi_dev, const char* guid,
305 UINT8 instance, char* outbuf, size_t outsize,
306 UINT32* sequence, int detail);
307 static void acpi_hp_hex_decode(char* buffer);
308
309 static d_open_t acpi_hp_hpcmi_open;
310 static d_close_t acpi_hp_hpcmi_close;
311 static d_read_t acpi_hp_hpcmi_read;
312
313 /* handler /dev/hpcmi device */
314 static struct dev_ops hpcmi_ops = {
315 { "hpcmi", 0, D_MPSAFE },
316 .d_open = acpi_hp_hpcmi_open,
317 .d_close = acpi_hp_hpcmi_close,
318 .d_read = acpi_hp_hpcmi_read,
319 };
320
321 static device_method_t acpi_hp_methods[] = {
322 DEVMETHOD(device_identify, acpi_hp_identify),
323 DEVMETHOD(device_probe, acpi_hp_probe),
324 DEVMETHOD(device_attach, acpi_hp_attach),
325 DEVMETHOD(device_detach, acpi_hp_detach),
326 DEVMETHOD_END
327 };
328
329 static driver_t acpi_hp_driver = {
330 "acpi_hp",
331 acpi_hp_methods,
332 sizeof(struct acpi_hp_softc),
333 };
334
335 static devclass_t acpi_hp_devclass;
336
337 DRIVER_MODULE(acpi_hp, acpi_wmi, acpi_hp_driver, acpi_hp_devclass,
338 NULL, NULL);
339 MODULE_VERSION(acpi_hp, 1);
340 MODULE_DEPEND(acpi_hp, acpi_wmi, 1, 1, 1);
341 MODULE_DEPEND(acpi_hp, acpi, 1, 1, 1);
342
343 static void
344 acpi_hp_evaluate_auto_on_off(struct acpi_hp_softc *sc)
345 {
346 int wireless;
347 int new_wlan_status;
348 int new_bluetooth_status;
349 int new_wwan_status;
350
351 wireless = acpi_hp_exec_wmi_command(sc->wmi_dev,
352 ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
353 new_wlan_status = -1;
354 new_bluetooth_status = -1;
355 new_wwan_status = -1;
356
357 if (sc->verbose)
358 device_printf(sc->wmi_dev, "Wireless status is %x\n", wireless);
359 if (sc->wlan_disable_if_radio_off && !(wireless & HP_MASK_WLAN_RADIO)
360 && (wireless & HP_MASK_WLAN_ENABLED)) {
361 acpi_hp_exec_wmi_command(sc->wmi_dev,
362 ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x100);
363 new_wlan_status = 0;
364 }
365 else if (sc->wlan_enable_if_radio_on && (wireless & HP_MASK_WLAN_RADIO)
366 && !(wireless & HP_MASK_WLAN_ENABLED)) {
367 acpi_hp_exec_wmi_command(sc->wmi_dev,
368 ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x101);
369 new_wlan_status = 1;
370 }
371 if (sc->bluetooth_disable_if_radio_off &&
372 !(wireless & HP_MASK_BLUETOOTH_RADIO) &&
373 (wireless & HP_MASK_BLUETOOTH_ENABLED)) {
374 acpi_hp_exec_wmi_command(sc->wmi_dev,
375 ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x200);
376 new_bluetooth_status = 0;
377 }
378 else if (sc->bluetooth_enable_if_radio_on &&
379 (wireless & HP_MASK_BLUETOOTH_RADIO) &&
380 !(wireless & HP_MASK_BLUETOOTH_ENABLED)) {
381 acpi_hp_exec_wmi_command(sc->wmi_dev,
382 ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x202);
383 new_bluetooth_status = 1;
384 }
385 if (sc->wwan_disable_if_radio_off &&
386 !(wireless & HP_MASK_WWAN_RADIO) &&
387 (wireless & HP_MASK_WWAN_ENABLED)) {
388 acpi_hp_exec_wmi_command(sc->wmi_dev,
389 ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x400);
390 new_wwan_status = 0;
391 }
392 else if (sc->wwan_enable_if_radio_on &&
393 (wireless & HP_MASK_WWAN_RADIO) &&
394 !(wireless & HP_MASK_WWAN_ENABLED)) {
395 acpi_hp_exec_wmi_command(sc->wmi_dev,
396 ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x404);
397 new_wwan_status = 1;
398 }
399
400 if (new_wlan_status == -1) {
401 new_wlan_status = (wireless & HP_MASK_WLAN_ON_AIR);
402 if ((new_wlan_status?1:0) != sc->was_wlan_on_air) {
403 sc->was_wlan_on_air = sc->was_wlan_on_air?0:1;
404 if (sc->verbose)
405 device_printf(sc->wmi_dev,
406 "WLAN on air changed to %i "
407 "(new_wlan_status is %i)\n",
408 sc->was_wlan_on_air, new_wlan_status);
409 acpi_UserNotify("HP", ACPI_ROOT_OBJECT,
410 0xc0+sc->was_wlan_on_air);
411 }
412 }
413 if (new_bluetooth_status == -1) {
414 new_bluetooth_status = (wireless & HP_MASK_BLUETOOTH_ON_AIR);
415 if ((new_bluetooth_status?1:0) != sc->was_bluetooth_on_air) {
416 sc->was_bluetooth_on_air = sc->was_bluetooth_on_air?
417 0:1;
418 if (sc->verbose)
419 device_printf(sc->wmi_dev,
420 "BLUETOOTH on air changed"
421 " to %i (new_bluetooth_status is %i)\n",
422 sc->was_bluetooth_on_air,
423 new_bluetooth_status);
424 acpi_UserNotify("HP", ACPI_ROOT_OBJECT,
425 0xd0+sc->was_bluetooth_on_air);
426 }
427 }
428 if (new_wwan_status == -1) {
429 new_wwan_status = (wireless & HP_MASK_WWAN_ON_AIR);
430 if ((new_wwan_status?1:0) != sc->was_wwan_on_air) {
431 sc->was_wwan_on_air = sc->was_wwan_on_air?0:1;
432 if (sc->verbose)
433 device_printf(sc->wmi_dev,
434 "WWAN on air changed to %i"
435 " (new_wwan_status is %i)\n",
436 sc->was_wwan_on_air, new_wwan_status);
437 acpi_UserNotify("HP", ACPI_ROOT_OBJECT,
438 0xe0+sc->was_wwan_on_air);
439 }
440 }
441 }
442
443 static void
444 acpi_hp_identify(driver_t *driver, device_t parent)
445 {
446
447 /* Don't do anything if driver is disabled. */
448 if (acpi_disabled("hp"))
449 return;
450
451 /* Add only a single device instance. */
452 if (device_find_child(parent, "acpi_hp", -1) != NULL)
453 return;
454
455 if (BUS_ADD_CHILD(parent, parent, 0, "acpi_hp", -1) == NULL)
456 device_printf(parent, "add acpi_hp child failed\n");
457 }
458
459 static int
460 acpi_hp_probe(device_t dev)
461 {
462
463 device_set_desc(dev, "HP ACPI-WMI Mapping");
464 return (0);
465 }
466
467 static int
468 acpi_hp_attach(device_t dev)
469 {
470 struct acpi_hp_softc *sc;
471 struct acpi_softc *acpi_sc;
472 int arg;
473
474 ACPI_SERIAL_INIT(hp);
475 ACPI_FUNCTION_TRACE((char *)(uintptr_t) __func__);
476
477 sc = device_get_softc(dev);
478 sc->dev = dev;
479 sc->has_notify = 0;
480 sc->has_cmi = 0;
481 sc->bluetooth_enable_if_radio_on = 0;
482 sc->bluetooth_disable_if_radio_off = 0;
483 sc->wlan_enable_if_radio_on = 0;
484 sc->wlan_disable_if_radio_off = 0;
485 sc->wlan_enable_if_radio_on = 0;
486 sc->wlan_disable_if_radio_off = 0;
487 sc->was_wlan_on_air = 0;
488 sc->was_bluetooth_on_air = 0;
489 sc->was_wwan_on_air = 0;
490 sc->cmi_detail = 0;
491 sc->cmi_order_size = -1;
492 sc->verbose = 0;
493 memset(sc->cmi_order, 0, sizeof(sc->cmi_order));
494 sc->wmi_dev = device_get_parent(dev);
495 acpi_sc = acpi_device_get_parent_softc(sc->wmi_dev);
496
497 if (!ACPI_WMI_PROVIDES_GUID_STRING(sc->wmi_dev,
498 ACPI_HP_WMI_BIOS_GUID)) {
499 device_printf(dev,
500 "WMI device does not provide the HP BIOS GUID\n");
501 return (EINVAL);
502 }
503 if (ACPI_WMI_PROVIDES_GUID_STRING(sc->wmi_dev,
504 ACPI_HP_WMI_EVENT_GUID)) {
505 device_printf(dev,
506 "HP event GUID detected, installing event handler\n");
507 if (ACPI_WMI_INSTALL_EVENT_HANDLER(sc->wmi_dev,
508 ACPI_HP_WMI_EVENT_GUID, acpi_hp_notify, dev)) {
509 device_printf(dev,
510 "Could not install notification handler!\n");
511 }
512 else {
513 sc->has_notify = 1;
514 }
515 }
516 if ((sc->has_cmi =
517 ACPI_WMI_PROVIDES_GUID_STRING(sc->wmi_dev, ACPI_HP_WMI_CMI_GUID)
518 )) {
519 device_printf(dev, "HP CMI GUID detected\n");
520 }
521
522 if (sc->has_cmi) {
523 sc->hpcmi_dev_t = make_dev(&hpcmi_ops, 0, UID_ROOT,
524 GID_WHEEL, 0644, "hpcmi");
525 sc->hpcmi_dev_t->si_drv1 = sc;
526 sc->hpcmi_open_pid = 0;
527 sc->hpcmi_bufptr = -1;
528 }
529
530 ACPI_SERIAL_BEGIN(hp);
531
532 sysctl_ctx_init(&sc->sysctl_ctx);
533 sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx,
534 SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), OID_AUTO,
535 "hp", CTLFLAG_RD, 0, "");
536
537 for (int i = 0; acpi_hp_sysctls[i].name != NULL; ++i) {
538 arg = 0;
539 if ((!sc->has_notify &&
540 (acpi_hp_sysctls[i].method ==
541 ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON ||
542 acpi_hp_sysctls[i].method ==
543 ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF ||
544 acpi_hp_sysctls[i].method ==
545 ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON ||
546 acpi_hp_sysctls[i].method ==
547 ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF ||
548 acpi_hp_sysctls[i].method ==
549 ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON ||
550 acpi_hp_sysctls[i].method ==
551 ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF)) ||
552 (arg = acpi_hp_sysctl_get(sc,
553 acpi_hp_sysctls[i].method)) < 0) {
554 continue;
555 }
556 if (acpi_hp_sysctls[i].method == ACPI_HP_METHOD_WLAN_ON_AIR) {
557 sc->was_wlan_on_air = arg;
558 }
559 else if (acpi_hp_sysctls[i].method ==
560 ACPI_HP_METHOD_BLUETOOTH_ON_AIR) {
561 sc->was_bluetooth_on_air = arg;
562 }
563 else if (acpi_hp_sysctls[i].method ==
564 ACPI_HP_METHOD_WWAN_ON_AIR) {
565 sc->was_wwan_on_air = arg;
566 }
567
568 SYSCTL_ADD_PROC(&sc->sysctl_ctx,
569 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO,
570 acpi_hp_sysctls[i].name, acpi_hp_sysctls[i].access,
571 sc, i, acpi_hp_sysctl, "I",
572 acpi_hp_sysctls[i].description);
573 }
574 ACPI_SERIAL_END(hp);
575
576 return (0);
577 }
578
579 static int
580 acpi_hp_detach(device_t dev)
581 {
582 int ret;
583
584 ACPI_FUNCTION_TRACE((char *)(uintptr_t) __func__);
585 struct acpi_hp_softc *sc = device_get_softc(dev);
586 if (sc->has_cmi && sc->hpcmi_open_pid != 0) {
587 ret = EBUSY;
588 }
589 else {
590 if (sc->has_notify) {
591 ACPI_WMI_REMOVE_EVENT_HANDLER(dev,
592 ACPI_HP_WMI_EVENT_GUID);
593 }
594 sysctl_ctx_free(&sc->sysctl_ctx);
595 if (sc->hpcmi_bufptr != -1) {
596 sbuf_delete(&sc->hpcmi_sbuf);
597 sc->hpcmi_bufptr = -1;
598 }
599 sc->hpcmi_open_pid = 0;
600 destroy_dev(sc->hpcmi_dev_t);
601 ret = 0;
602 }
603
604 return (ret);
605 }
606
607 static int
608 acpi_hp_sysctl(SYSCTL_HANDLER_ARGS)
609 {
610 struct acpi_hp_softc *sc;
611 int arg;
612 int oldarg;
613 int error = 0;
614 int function;
615 int method;
616
617 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
618
619 sc = (struct acpi_hp_softc *)oidp->oid_arg1;
620 function = oidp->oid_arg2;
621 method = acpi_hp_sysctls[function].method;
622
623 ACPI_SERIAL_BEGIN(hp);
624 arg = acpi_hp_sysctl_get(sc, method);
625 oldarg = arg;
626 error = sysctl_handle_int(oidp, &arg, 0, req);
627 if (!error && req->newptr != NULL) {
628 error = acpi_hp_sysctl_set(sc, method, arg, oldarg);
629 }
630 ACPI_SERIAL_END(hp);
631
632 return (error);
633 }
634
635 static int
636 acpi_hp_sysctl_get(struct acpi_hp_softc *sc, int method)
637 {
638 int val = 0;
639
640 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
641 ACPI_SERIAL_ASSERT(hp);
642
643 switch (method) {
644 case ACPI_HP_METHOD_WLAN_ENABLED:
645 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
646 ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
647 val = ((val & HP_MASK_WLAN_ENABLED) != 0);
648 break;
649 case ACPI_HP_METHOD_WLAN_RADIO:
650 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
651 ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
652 val = ((val & HP_MASK_WLAN_RADIO) != 0);
653 break;
654 case ACPI_HP_METHOD_WLAN_ON_AIR:
655 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
656 ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
657 val = ((val & HP_MASK_WLAN_ON_AIR) != 0);
658 break;
659 case ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON:
660 val = sc->wlan_enable_if_radio_on;
661 break;
662 case ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF:
663 val = sc->wlan_disable_if_radio_off;
664 break;
665 case ACPI_HP_METHOD_BLUETOOTH_ENABLED:
666 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
667 ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
668 val = ((val & HP_MASK_BLUETOOTH_ENABLED) != 0);
669 break;
670 case ACPI_HP_METHOD_BLUETOOTH_RADIO:
671 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
672 ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
673 val = ((val & HP_MASK_BLUETOOTH_RADIO) != 0);
674 break;
675 case ACPI_HP_METHOD_BLUETOOTH_ON_AIR:
676 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
677 ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
678 val = ((val & HP_MASK_BLUETOOTH_ON_AIR) != 0);
679 break;
680 case ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON:
681 val = sc->bluetooth_enable_if_radio_on;
682 break;
683 case ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF:
684 val = sc->bluetooth_disable_if_radio_off;
685 break;
686 case ACPI_HP_METHOD_WWAN_ENABLED:
687 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
688 ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
689 val = ((val & HP_MASK_WWAN_ENABLED) != 0);
690 break;
691 case ACPI_HP_METHOD_WWAN_RADIO:
692 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
693 ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
694 val = ((val & HP_MASK_WWAN_RADIO) != 0);
695 break;
696 case ACPI_HP_METHOD_WWAN_ON_AIR:
697 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
698 ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
699 val = ((val & HP_MASK_WWAN_ON_AIR) != 0);
700 break;
701 case ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON:
702 val = sc->wwan_enable_if_radio_on;
703 break;
704 case ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF:
705 val = sc->wwan_disable_if_radio_off;
706 break;
707 case ACPI_HP_METHOD_ALS:
708 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
709 ACPI_HP_WMI_ALS_COMMAND, 0, 0);
710 break;
711 case ACPI_HP_METHOD_DISPLAY:
712 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
713 ACPI_HP_WMI_DISPLAY_COMMAND, 0, 0);
714 break;
715 case ACPI_HP_METHOD_HDDTEMP:
716 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
717 ACPI_HP_WMI_HDDTEMP_COMMAND, 0, 0);
718 break;
719 case ACPI_HP_METHOD_DOCK:
720 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
721 ACPI_HP_WMI_DOCK_COMMAND, 0, 0);
722 break;
723 case ACPI_HP_METHOD_CMI_DETAIL:
724 val = sc->cmi_detail;
725 break;
726 case ACPI_HP_METHOD_VERBOSE:
727 val = sc->verbose;
728 break;
729 }
730
731 return (val);
732 }
733
734 static int
735 acpi_hp_sysctl_set(struct acpi_hp_softc *sc, int method, int arg, int oldarg)
736 {
737 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
738 ACPI_SERIAL_ASSERT(hp);
739
740 if (method != ACPI_HP_METHOD_CMI_DETAIL &&
741 method != ACPI_HP_METHOD_VERBOSE)
742 arg = arg?1:0;
743
744 if (arg != oldarg) {
745 switch (method) {
746 case ACPI_HP_METHOD_WLAN_ENABLED:
747 return (acpi_hp_exec_wmi_command(sc->wmi_dev,
748 ACPI_HP_WMI_WIRELESS_COMMAND, 1,
749 arg?0x101:0x100));
750 case ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON:
751 sc->wlan_enable_if_radio_on = arg;
752 acpi_hp_evaluate_auto_on_off(sc);
753 break;
754 case ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF:
755 sc->wlan_disable_if_radio_off = arg;
756 acpi_hp_evaluate_auto_on_off(sc);
757 break;
758 case ACPI_HP_METHOD_BLUETOOTH_ENABLED:
759 return (acpi_hp_exec_wmi_command(sc->wmi_dev,
760 ACPI_HP_WMI_WIRELESS_COMMAND, 1,
761 arg?0x202:0x200));
762 case ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON:
763 sc->bluetooth_enable_if_radio_on = arg;
764 acpi_hp_evaluate_auto_on_off(sc);
765 break;
766 case ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF:
767 sc->bluetooth_disable_if_radio_off = arg?1:0;
768 acpi_hp_evaluate_auto_on_off(sc);
769 break;
770 case ACPI_HP_METHOD_WWAN_ENABLED:
771 return (acpi_hp_exec_wmi_command(sc->wmi_dev,
772 ACPI_HP_WMI_WIRELESS_COMMAND, 1,
773 arg?0x404:0x400));
774 case ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON:
775 sc->wwan_enable_if_radio_on = arg?1:0;
776 acpi_hp_evaluate_auto_on_off(sc);
777 break;
778 case ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF:
779 sc->wwan_disable_if_radio_off = arg?1:0;
780 acpi_hp_evaluate_auto_on_off(sc);
781 break;
782 case ACPI_HP_METHOD_ALS:
783 return (acpi_hp_exec_wmi_command(sc->wmi_dev,
784 ACPI_HP_WMI_ALS_COMMAND, 1,
785 arg?1:0));
786 case ACPI_HP_METHOD_CMI_DETAIL:
787 sc->cmi_detail = arg;
788 if ((arg & ACPI_HP_CMI_DETAIL_SHOW_MAX_INSTANCE) !=
789 (oldarg & ACPI_HP_CMI_DETAIL_SHOW_MAX_INSTANCE)) {
790 sc->cmi_order_size = -1;
791 }
792 break;
793 case ACPI_HP_METHOD_VERBOSE:
794 sc->verbose = arg;
795 break;
796 }
797 }
798
799 return (0);
800 }
801
802 static __inline void
803 acpi_hp_free_buffer(ACPI_BUFFER* buf) {
804 if (buf && buf->Pointer) {
805 AcpiOsFree(buf->Pointer);
806 }
807 }
808
809 static void
810 acpi_hp_notify(ACPI_HANDLE h, UINT32 notify, void *context)
811 {
812 device_t dev = context;
813 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
814
815 struct acpi_hp_softc *sc = device_get_softc(dev);
816 ACPI_BUFFER response = { ACPI_ALLOCATE_BUFFER, NULL };
817 ACPI_OBJECT *obj;
818 ACPI_WMI_GET_EVENT_DATA(sc->wmi_dev, notify, &response);
819 obj = (ACPI_OBJECT*) response.Pointer;
820 if (obj && obj->Type == ACPI_TYPE_BUFFER && obj->Buffer.Length == 8) {
821 if (*((UINT8 *) obj->Buffer.Pointer) == 0x5) {
822 acpi_hp_evaluate_auto_on_off(sc);
823 }
824 }
825 acpi_hp_free_buffer(&response);
826 }
827
828 static int
829 acpi_hp_exec_wmi_command(device_t wmi_dev, int command, int is_write, int val)
830 {
831 UINT32 params[5] = { 0x55434553,
832 is_write?2:1,
833 command,
834 is_write?4:0,
835 val};
836 UINT32* result;
837 ACPI_OBJECT *obj;
838 ACPI_BUFFER in = { sizeof(params), &params };
839 ACPI_BUFFER out = { ACPI_ALLOCATE_BUFFER, NULL };
840 int retval;
841
842 if (ACPI_FAILURE(ACPI_WMI_EVALUATE_CALL(wmi_dev, ACPI_HP_WMI_BIOS_GUID,
843 0, 0x3, &in, &out))) {
844 acpi_hp_free_buffer(&out);
845 return (-EINVAL);
846 }
847 obj = out.Pointer;
848 if (!obj || obj->Type != ACPI_TYPE_BUFFER) {
849 acpi_hp_free_buffer(&out);
850 return (-EINVAL);
851 }
852 result = (UINT32*) obj->Buffer.Pointer;
853 retval = result[2];
854 if (result[1] > 0) {
855 retval = result[1];
856 }
857 acpi_hp_free_buffer(&out);
858
859 return (retval);
860 }
861
862 static __inline char*
863 acpi_hp_get_string_from_object(ACPI_OBJECT* obj, char* dst, size_t size) {
864 int length;
865
866 dst[0] = 0;
867 if (obj->Type == ACPI_TYPE_STRING) {
868 length = obj->String.Length+1;
869 if (length > size) {
870 length = size - 1;
871 }
872 strlcpy(dst, obj->String.Pointer, length);
873 acpi_hp_hex_decode(dst);
874 }
875
876 return (dst);
877 }
878
879
880 /*
881 * Read BIOS Setting block in instance "instance".
882 * The block returned is ACPI_TYPE_PACKAGE which should contain the following
883 * elements:
884 * Index Meaning
885 * 0 Setting Name [string]
886 * 1 Value (comma separated, asterisk marks the current value) [string]
887 * 2 Path within the bios hierarchy [string]
888 * 3 IsReadOnly [int]
889 * 4 DisplayInUI [int]
890 * 5 RequiresPhysicalPresence [int]
891 * 6 Sequence for ordering within the bios settings (absolute) [int]
892 * 7 Length of prerequisites array [int]
893 * 8..8+[7] PrerequisiteN [string]
894 * 9+[7] Current value (in case of enum) [string] / Array length [int]
895 * 10+[7] Enum length [int] / Array values
896 * 11+[7]ff Enum value at index x [string]
897 */
898 static int
899 acpi_hp_get_cmi_block(device_t wmi_dev, const char* guid, UINT8 instance,
900 char* outbuf, size_t outsize, UINT32* sequence, int detail)
901 {
902 ACPI_OBJECT *obj;
903 ACPI_BUFFER out = { ACPI_ALLOCATE_BUFFER, NULL };
904 int i;
905 int outlen;
906 int size = 255;
907 int has_enums = 0;
908 int valuebase = 0;
909 char string_buffer[size];
910 int enumbase;
911
912 *sequence = 0; /* whack gcc warning */
913 outlen = 0;
914 outbuf[0] = 0;
915 if (ACPI_FAILURE(ACPI_WMI_GET_BLOCK(wmi_dev, guid, instance, &out))) {
916 acpi_hp_free_buffer(&out);
917 return (-EINVAL);
918 }
919 obj = out.Pointer;
920 if (!obj || obj->Type != ACPI_TYPE_PACKAGE) {
921 acpi_hp_free_buffer(&out);
922 return (-EINVAL);
923 }
924
925 if (obj->Package.Count >= 8 &&
926 obj->Package.Elements[7].Type == ACPI_TYPE_INTEGER) {
927 valuebase = 8 + obj->Package.Elements[7].Integer.Value;
928 }
929
930 /* check if this matches our expectations based on limited knowledge */
931 if (valuebase > 7 && obj->Package.Count > valuebase + 1 &&
932 obj->Package.Elements[0].Type == ACPI_TYPE_STRING &&
933 obj->Package.Elements[1].Type == ACPI_TYPE_STRING &&
934 obj->Package.Elements[2].Type == ACPI_TYPE_STRING &&
935 obj->Package.Elements[3].Type == ACPI_TYPE_INTEGER &&
936 obj->Package.Elements[4].Type == ACPI_TYPE_INTEGER &&
937 obj->Package.Elements[5].Type == ACPI_TYPE_INTEGER &&
938 obj->Package.Elements[6].Type == ACPI_TYPE_INTEGER &&
939 obj->Package.Elements[valuebase].Type == ACPI_TYPE_STRING &&
940 obj->Package.Elements[valuebase+1].Type == ACPI_TYPE_INTEGER &&
941 obj->Package.Count > valuebase +
942 obj->Package.Elements[valuebase+1].Integer.Value
943 ) {
944 enumbase = valuebase + 1;
945 if (detail & ACPI_HP_CMI_DETAIL_PATHS) {
946 strlcat(outbuf, acpi_hp_get_string_from_object(
947 &obj->Package.Elements[2], string_buffer, size),
948 outsize);
949 outlen += 48;
950 while (strlen(outbuf) < outlen)
951 strlcat(outbuf, " ", outsize);
952 }
953 strlcat(outbuf, acpi_hp_get_string_from_object(
954 &obj->Package.Elements[0], string_buffer, size),
955 outsize);
956 outlen += 43;
957 while (strlen(outbuf) < outlen)
958 strlcat(outbuf, " ", outsize);
959 strlcat(outbuf, acpi_hp_get_string_from_object(
960 &obj->Package.Elements[valuebase], string_buffer,
961 size),
962 outsize);
963 outlen += 21;
964 while (strlen(outbuf) < outlen)
965 strlcat(outbuf, " ", outsize);
966 for (i = 0; i < strlen(outbuf); ++i)
967 if (outbuf[i] == '\\')
968 outbuf[i] = '/';
969 if (detail & ACPI_HP_CMI_DETAIL_ENUMS) {
970 for (i = enumbase + 1; i < enumbase + 1 +
971 obj->Package.Elements[enumbase].Integer.Value;
972 ++i) {
973 acpi_hp_get_string_from_object(
974 &obj->Package.Elements[i], string_buffer,
975 size);
976 if (strlen(string_buffer) > 1 ||
977 (strlen(string_buffer) == 1 &&
978 string_buffer[0] != ' ')) {
979 if (has_enums)
980 strlcat(outbuf, "/", outsize);
981 else
982 strlcat(outbuf, " (", outsize);
983 strlcat(outbuf, string_buffer, outsize);
984 has_enums = 1;
985 }
986 }
987 }
988 if (has_enums)
989 strlcat(outbuf, ")", outsize);
990 if (detail & ACPI_HP_CMI_DETAIL_FLAGS) {
991 strlcat(outbuf, obj->Package.Elements[3].Integer.Value?
992 " [ReadOnly]":"", outsize);
993 strlcat(outbuf, obj->Package.Elements[4].Integer.Value?
994 "":" [NOUI]", outsize);
995 strlcat(outbuf, obj->Package.Elements[5].Integer.Value?
996 " [RPP]":"", outsize);
997 }
998 *sequence = (UINT32) obj->Package.Elements[6].Integer.Value;
999 }
1000 acpi_hp_free_buffer(&out);
1001
1002 return (0);
1003 }
1004
1005
1006
1007 /*
1008 * Convert given two digit hex string (hexin) to an UINT8 referenced
1009 * by byteout.
1010 * Return != 0 if the was a problem (invalid input)
1011 */
1012 static __inline int acpi_hp_hex_to_int(const UINT8 *hexin, UINT8 *byteout)
1013 {
1014 unsigned int hi;
1015 unsigned int lo;
1016
1017 hi = hexin[0];
1018 lo = hexin[1];
1019 if ('0' <= hi && hi <= '9')
1020 hi -= '0';
1021 else if ('A' <= hi && hi <= 'F')
1022 hi -= ('A' - 10);
1023 else if ('a' <= hi && hi <= 'f')
1024 hi -= ('a' - 10);
1025 else
1026 return (1);
1027 if ('0' <= lo && lo <= '9')
1028 lo -= '0';
1029 else if ('A' <= lo && lo <= 'F')
1030 lo -= ('A' - 10);
1031 else if ('a' <= lo && lo <= 'f')
1032 lo -= ('a' - 10);
1033 else
1034 return (1);
1035 *byteout = (hi << 4) + lo;
1036
1037 return (0);
1038 }
1039
1040
1041 static void
1042 acpi_hp_hex_decode(char* buffer)
1043 {
1044 int i;
1045 int length = strlen(buffer);
1046 UINT8 *uin;
1047 UINT8 uout;
1048
1049 if (((int)length/2)*2 == length || length < 10) return;
1050
1051 for (i = 0; i<length; ++i) {
1052 if (!((i+1)%3)) {
1053 if (buffer[i] != ' ')
1054 return;
1055 }
1056 else
1057 if (!((buffer[i] >= '0' && buffer[i] <= '9') ||
1058 (buffer[i] >= 'A' && buffer[i] <= 'F')))
1059 return;
1060 }
1061
1062 for (i = 0; i<length; i += 3) {
1063 uin = &buffer[i];
1064 uout = 0;
1065 acpi_hp_hex_to_int(uin, &uout);
1066 buffer[i/3] = (char) uout;
1067 }
1068 buffer[(length+1)/3] = 0;
1069 }
1070
1071
1072 /*
1073 * open hpcmi device
1074 */
1075 static int
1076 acpi_hp_hpcmi_open(struct dev_open_args *ap)
1077 {
1078 struct acpi_hp_softc *sc;
1079 int ret;
1080 struct cdev *dev = ap->a_head.a_dev;
1081 struct thread *td = curthread;
1082
1083 if (dev == NULL || dev->si_drv1 == NULL)
1084 return (EBADF);
1085 sc = dev->si_drv1;
1086
1087 ACPI_SERIAL_BEGIN(hp);
1088 if (sc->hpcmi_open_pid != 0) {
1089 ret = EBUSY;
1090 }
1091 else {
1092 if (sbuf_new(&sc->hpcmi_sbuf, NULL, 4096, SBUF_AUTOEXTEND)
1093 == NULL) {
1094 ret = ENXIO;
1095 } else {
1096 sc->hpcmi_open_pid = td->td_proc->p_pid;
1097 sc->hpcmi_bufptr = 0;
1098 ret = 0;
1099 }
1100 }
1101 ACPI_SERIAL_END(hp);
1102
1103 return (ret);
1104 }
1105
1106 /*
1107 * close hpcmi device
1108 */
1109 static int
1110 acpi_hp_hpcmi_close(struct dev_close_args *ap)
1111 {
1112 struct acpi_hp_softc *sc;
1113 int ret;
1114 struct cdev *dev = ap->a_head.a_dev;
1115
1116 if (dev == NULL || dev->si_drv1 == NULL)
1117 return (EBADF);
1118 sc = dev->si_drv1;
1119
1120 ACPI_SERIAL_BEGIN(hp);
1121 if (sc->hpcmi_open_pid == 0) {
1122 ret = EBADF;
1123 }
1124 else {
1125 if (sc->hpcmi_bufptr != -1) {
1126 sbuf_delete(&sc->hpcmi_sbuf);
1127 sc->hpcmi_bufptr = -1;
1128 }
1129 sc->hpcmi_open_pid = 0;
1130 ret = 0;
1131 }
1132 ACPI_SERIAL_END(hp);
1133
1134 return (ret);
1135 }
1136
1137 /*
1138 * Read from hpcmi bios information
1139 */
1140 static int
1141 acpi_hp_hpcmi_read(struct dev_read_args *ap)
1142 {
1143 struct acpi_hp_softc *sc;
1144 int pos, i, l, ret;
1145 UINT8 instance;
1146 UINT8 maxInstance;
1147 UINT32 sequence;
1148 int linesize = 1025;
1149 char line[linesize];
1150 struct cdev *dev = ap->a_head.a_dev;
1151 struct uio *buf = ap->a_uio;
1152
1153 if (dev == NULL || dev->si_drv1 == NULL)
1154 return (EBADF);
1155 sc = dev->si_drv1;
1156
1157 ACPI_SERIAL_BEGIN(hp);
1158 if (sc->hpcmi_open_pid != buf->uio_td->td_proc->p_pid
1159 || sc->hpcmi_bufptr == -1) {
1160 ret = EBADF;
1161 }
1162 else {
1163 if (!sbuf_done(&sc->hpcmi_sbuf)) {
1164 if (sc->cmi_order_size < 0) {
1165 maxInstance = sc->has_cmi;
1166 if (!(sc->cmi_detail &
1167 ACPI_HP_CMI_DETAIL_SHOW_MAX_INSTANCE) &&
1168 maxInstance > 0) {
1169 maxInstance--;
1170 }
1171 sc->cmi_order_size = 0;
1172 for (instance = 0; instance < maxInstance;
1173 ++instance) {
1174 if (acpi_hp_get_cmi_block(sc->wmi_dev,
1175 ACPI_HP_WMI_CMI_GUID, instance,
1176 line, linesize, &sequence,
1177 sc->cmi_detail)) {
1178 instance = maxInstance;
1179 }
1180 else {
1181 pos = sc->cmi_order_size;
1182 for (i=0;
1183 i<sc->cmi_order_size && i<127;
1184 ++i) {
1185 if (sc->cmi_order[i].sequence > sequence) {
1186 pos = i;
1187 break;
1188 }
1189 }
1190 for (i=sc->cmi_order_size;
1191 i>pos;
1192 --i) {
1193 sc->cmi_order[i].sequence =
1194 sc->cmi_order[i-1].sequence;
1195 sc->cmi_order[i].instance =
1196 sc->cmi_order[i-1].instance;
1197 }
1198 sc->cmi_order[pos].sequence =
1199 sequence;
1200 sc->cmi_order[pos].instance =
1201 instance;
1202 sc->cmi_order_size++;
1203 }
1204 }
1205 }
1206 for (i=0; i<sc->cmi_order_size; ++i) {
1207 if (!acpi_hp_get_cmi_block(sc->wmi_dev,
1208 ACPI_HP_WMI_CMI_GUID,
1209 sc->cmi_order[i].instance, line, linesize,
1210 &sequence, sc->cmi_detail)) {
1211 sbuf_printf(&sc->hpcmi_sbuf, "%s\n", line);
1212 }
1213 }
1214 sbuf_finish(&sc->hpcmi_sbuf);
1215 }
1216 if (sbuf_len(&sc->hpcmi_sbuf) <= 0) {
1217 sbuf_delete(&sc->hpcmi_sbuf);
1218 sc->hpcmi_bufptr = -1;
1219 sc->hpcmi_open_pid = 0;
1220 ret = ENOMEM;
1221 } else {
1222 l = min(buf->uio_resid, sbuf_len(&sc->hpcmi_sbuf) -
1223 sc->hpcmi_bufptr);
1224 ret = (l > 0)?uiomove(sbuf_data(&sc->hpcmi_sbuf) +
1225 sc->hpcmi_bufptr, l, buf) : 0;
1226 sc->hpcmi_bufptr += l;
1227 }
1228 }
1229 ACPI_SERIAL_END(hp);
1230
1231 return (ret);
1232 }
DragonFly BSD