sys/dev/acpica/acpi_hp/acpi_hp.c

   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 }