sys/dev/acpi_support/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
  27 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD$");
  29
  30 /*
  31  * Driver for extra ACPI-controlled features found on HP laptops
  32  * that use a WMI enabled BIOS (e.g. HP Compaq 8510p and 6510p).
  33  * Allows to control and read status of integrated hardware and read
  34  * BIOS settings through CMI.
  35  * Inspired by the hp-wmi driver, which implements a subset of these
  36  * features (hotkeys) on Linux.
  37  *
  38  * HP CMI whitepaper:
  39  *     http://h20331.www2.hp.com/Hpsub/downloads/cmi_whitepaper.pdf
  40  * wmi-hp for Linux:
  41  *     http://www.kernel.org
  42  * WMI and ACPI:
  43  *     http://www.microsoft.com/whdc/system/pnppwr/wmi/wmi-acpi.mspx
  44  */
  45
  46 #include "opt_acpi.h"
  47 #include <sys/param.h>
  48 #include <sys/conf.h>
  49 #include <sys/uio.h>
  50 #include <sys/proc.h>
  51 #include <sys/kernel.h>
  52 #include <sys/bus.h>
  53 #include <sys/sbuf.h>
  54 #include <sys/module.h>
  55 #include <sys/sysctl.h>
  56
  57 #include <contrib/dev/acpica/include/acpi.h>
  58 #include <contrib/dev/acpica/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 cdevsw hpcmi_cdevsw = {
 315         .d_version = D_VERSION,
 316         .d_open = acpi_hp_hpcmi_open,
 317         .d_close = acpi_hp_hpcmi_close,
 318         .d_read = acpi_hp_hpcmi_read,
 319         .d_name = "hpcmi",
 320 };
 321
 322 static device_method_t acpi_hp_methods[] = {
 323         DEVMETHOD(device_identify, acpi_hp_identify),
 324         DEVMETHOD(device_probe, acpi_hp_probe),
 325         DEVMETHOD(device_attach, acpi_hp_attach),
 326         DEVMETHOD(device_detach, acpi_hp_detach),
 327
 328         DEVMETHOD_END
 329 };
 330
 331 static driver_t acpi_hp_driver = {
 332         "acpi_hp",
 333         acpi_hp_methods,
 334         sizeof(struct acpi_hp_softc),
 335 };
 336
 337 static devclass_t acpi_hp_devclass;
 338
 339 DRIVER_MODULE(acpi_hp, acpi_wmi, acpi_hp_driver, acpi_hp_devclass,
 340                 0, 0);
 341 MODULE_DEPEND(acpi_hp, acpi_wmi, 1, 1, 1);
 342 MODULE_DEPEND(acpi_hp, acpi, 1, 1, 1);
 343
 344 static void
 345 acpi_hp_evaluate_auto_on_off(struct acpi_hp_softc *sc)
 346 {
 347         int     wireless;
 348         int     new_wlan_status;
 349         int     new_bluetooth_status;
 350         int     new_wwan_status;
 351
 352         wireless = acpi_hp_exec_wmi_command(sc->wmi_dev,
 353                     ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 354         new_wlan_status = -1;
 355         new_bluetooth_status = -1;
 356         new_wwan_status = -1;
 357
 358         if (sc->verbose)
 359                 device_printf(sc->wmi_dev, "Wireless status is %x\n", wireless);
 360         if (sc->wlan_disable_if_radio_off && !(wireless & HP_MASK_WLAN_RADIO)
 361             &&  (wireless & HP_MASK_WLAN_ENABLED)) {
 362                 acpi_hp_exec_wmi_command(sc->wmi_dev,
 363                     ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x100);
 364                 new_wlan_status = 0;
 365         }
 366         else if (sc->wlan_enable_if_radio_on && (wireless & HP_MASK_WLAN_RADIO)
 367                 &&  !(wireless & HP_MASK_WLAN_ENABLED)) {
 368                 acpi_hp_exec_wmi_command(sc->wmi_dev,
 369                     ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x101);
 370                 new_wlan_status = 1;
 371         }
 372         if (sc->bluetooth_disable_if_radio_off &&
 373             !(wireless & HP_MASK_BLUETOOTH_RADIO) &&
 374             (wireless & HP_MASK_BLUETOOTH_ENABLED)) {
 375                 acpi_hp_exec_wmi_command(sc->wmi_dev,
 376                     ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x200);
 377                 new_bluetooth_status = 0;
 378         }
 379         else if (sc->bluetooth_enable_if_radio_on &&
 380                 (wireless & HP_MASK_BLUETOOTH_RADIO) &&
 381                 !(wireless & HP_MASK_BLUETOOTH_ENABLED)) {
 382                 acpi_hp_exec_wmi_command(sc->wmi_dev,
 383                     ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x202);
 384                 new_bluetooth_status = 1;
 385         }
 386         if (sc->wwan_disable_if_radio_off &&
 387             !(wireless & HP_MASK_WWAN_RADIO) &&
 388             (wireless & HP_MASK_WWAN_ENABLED)) {
 389                 acpi_hp_exec_wmi_command(sc->wmi_dev,
 390                 ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x400);
 391                 new_wwan_status = 0;
 392         }
 393         else if (sc->wwan_enable_if_radio_on &&
 394                 (wireless & HP_MASK_WWAN_RADIO) &&
 395                 !(wireless & HP_MASK_WWAN_ENABLED)) {
 396                 acpi_hp_exec_wmi_command(sc->wmi_dev,
 397                     ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x404);
 398                 new_wwan_status = 1;
 399         }
 400
 401         if (new_wlan_status == -1) {
 402                 new_wlan_status = (wireless & HP_MASK_WLAN_ON_AIR);
 403                 if ((new_wlan_status?1:0) != sc->was_wlan_on_air) {
 404                         sc->was_wlan_on_air = sc->was_wlan_on_air?0:1;
 405                         if (sc->verbose)
 406                                 device_printf(sc->wmi_dev,
 407                                     "WLAN on air changed to %i "
 408                                     "(new_wlan_status is %i)\n",
 409                                     sc->was_wlan_on_air, new_wlan_status);
 410                         acpi_UserNotify("HP", ACPI_ROOT_OBJECT,
 411                             0xc0+sc->was_wlan_on_air);
 412                 }
 413         }
 414         if (new_bluetooth_status == -1) {
 415                 new_bluetooth_status = (wireless & HP_MASK_BLUETOOTH_ON_AIR);
 416                 if ((new_bluetooth_status?1:0) != sc->was_bluetooth_on_air) {
 417                         sc->was_bluetooth_on_air = sc->was_bluetooth_on_air?
 418                             0:1;
 419                         if (sc->verbose)
 420                                 device_printf(sc->wmi_dev,
 421                                     "BLUETOOTH on air changed"
 422                                     " to %i (new_bluetooth_status is %i)\n",
 423                                     sc->was_bluetooth_on_air,
 424                                     new_bluetooth_status);
 425                         acpi_UserNotify("HP", ACPI_ROOT_OBJECT,
 426                             0xd0+sc->was_bluetooth_on_air);
 427                 }
 428         }
 429         if (new_wwan_status == -1) {
 430                 new_wwan_status = (wireless & HP_MASK_WWAN_ON_AIR);
 431                 if ((new_wwan_status?1:0) != sc->was_wwan_on_air) {
 432                         sc->was_wwan_on_air = sc->was_wwan_on_air?0:1;
 433                         if (sc->verbose)
 434                                 device_printf(sc->wmi_dev,
 435                                     "WWAN on air changed to %i"
 436                                     " (new_wwan_status is %i)\n",
 437                                     sc->was_wwan_on_air, new_wwan_status);
 438                         acpi_UserNotify("HP", ACPI_ROOT_OBJECT,
 439                             0xe0+sc->was_wwan_on_air);
 440                 }
 441         }
 442 }
 443
 444 static void
 445 acpi_hp_identify(driver_t *driver, device_t parent)
 446 {
 447
 448         /* Don't do anything if driver is disabled. */
 449         if (acpi_disabled("hp"))
 450                 return;
 451
 452         /* Add only a single device instance. */
 453         if (device_find_child(parent, "acpi_hp", -1) != NULL)
 454                 return;
 455
 456         if (BUS_ADD_CHILD(parent, 0, "acpi_hp", -1) == NULL)
 457                 device_printf(parent, "add acpi_hp child failed\n");
 458 }
 459
 460 static int
 461 acpi_hp_probe(device_t dev)
 462 {
 463
 464         device_set_desc(dev, "HP ACPI-WMI Mapping");
 465         return (0);
 466 }
 467
 468 static int
 469 acpi_hp_attach(device_t dev)
 470 {
 471         struct acpi_hp_softc    *sc;
 472         int                     arg;
 473
 474         ACPI_FUNCTION_TRACE((char *)(uintptr_t) __func__);
 475
 476         sc = device_get_softc(dev);
 477         sc->dev = dev;
 478         sc->has_notify = 0;
 479         sc->has_cmi = 0;
 480         sc->bluetooth_enable_if_radio_on = 0;
 481         sc->bluetooth_disable_if_radio_off = 0;
 482         sc->wlan_enable_if_radio_on = 0;
 483         sc->wlan_disable_if_radio_off = 0;
 484         sc->wlan_enable_if_radio_on = 0;
 485         sc->wlan_disable_if_radio_off = 0;
 486         sc->was_wlan_on_air = 0;
 487         sc->was_bluetooth_on_air = 0;
 488         sc->was_wwan_on_air = 0;
 489         sc->cmi_detail = 0;
 490         sc->cmi_order_size = -1;
 491         sc->verbose = 0;
 492         memset(sc->cmi_order, 0, sizeof(sc->cmi_order));
 493
 494         sc->wmi_dev = device_get_parent(dev);
 495         if (!ACPI_WMI_PROVIDES_GUID_STRING(sc->wmi_dev,
 496             ACPI_HP_WMI_BIOS_GUID)) {
 497                 device_printf(dev,
 498                     "WMI device does not provide the HP BIOS GUID\n");
 499                 return (EINVAL);
 500         }
 501         if (ACPI_WMI_PROVIDES_GUID_STRING(sc->wmi_dev,
 502             ACPI_HP_WMI_EVENT_GUID)) {
 503                 device_printf(dev,
 504                     "HP event GUID detected, installing event handler\n");
 505                 if (ACPI_WMI_INSTALL_EVENT_HANDLER(sc->wmi_dev,
 506                     ACPI_HP_WMI_EVENT_GUID, acpi_hp_notify, dev)) {
 507                         device_printf(dev,
 508                             "Could not install notification handler!\n");
 509                 }
 510                 else {
 511                         sc->has_notify = 1;
 512                 }
 513         }
 514         if ((sc->has_cmi =
 515             ACPI_WMI_PROVIDES_GUID_STRING(sc->wmi_dev, ACPI_HP_WMI_CMI_GUID)
 516             )) {
 517                 device_printf(dev, "HP CMI GUID detected\n");
 518         }
 519
 520         if (sc->has_cmi) {
 521                 sc->hpcmi_dev_t = make_dev(&hpcmi_cdevsw, 0, UID_ROOT,
 522                             GID_WHEEL, 0644, "hpcmi");
 523                 sc->hpcmi_dev_t->si_drv1 = sc;
 524                 sc->hpcmi_open_pid = 0;
 525                 sc->hpcmi_bufptr = -1;
 526         }
 527
 528         ACPI_SERIAL_BEGIN(hp);
 529
 530         sc->sysctl_ctx = device_get_sysctl_ctx(dev);
 531         sc->sysctl_tree = device_get_sysctl_tree(dev);
 532         for (int i = 0; acpi_hp_sysctls[i].name != NULL; ++i) {
 533                 arg = 0;
 534                 if ((!sc->has_notify &&
 535                     (acpi_hp_sysctls[i].method ==
 536                         ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON ||
 537                     acpi_hp_sysctls[i].method ==
 538                         ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF ||
 539                     acpi_hp_sysctls[i].method ==
 540                         ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON ||
 541                     acpi_hp_sysctls[i].method ==
 542                         ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF ||
 543                     acpi_hp_sysctls[i].method ==
 544                         ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON ||
 545                     acpi_hp_sysctls[i].method ==
 546                         ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF)) ||
 547                     (arg = acpi_hp_sysctl_get(sc,
 548                     acpi_hp_sysctls[i].method)) < 0) {
 549                         continue;
 550                 }
 551                 if (acpi_hp_sysctls[i].method == ACPI_HP_METHOD_WLAN_ON_AIR) {
 552                         sc->was_wlan_on_air = arg;
 553                 }
 554                 else if (acpi_hp_sysctls[i].method ==
 555                             ACPI_HP_METHOD_BLUETOOTH_ON_AIR) {
 556                         sc->was_bluetooth_on_air = arg;
 557                 }
 558                 else if (acpi_hp_sysctls[i].method ==
 559                             ACPI_HP_METHOD_WWAN_ON_AIR) {
 560                         sc->was_wwan_on_air = arg;
 561                 }
 562
 563                 SYSCTL_ADD_PROC(sc->sysctl_ctx,
 564                 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO,
 565                         acpi_hp_sysctls[i].name, acpi_hp_sysctls[i].access,
 566                         sc, i, acpi_hp_sysctl, "I",
 567                         acpi_hp_sysctls[i].description);
 568         }
 569         ACPI_SERIAL_END(hp);
 570
 571         return (0);
 572 }
 573
 574 static int
 575 acpi_hp_detach(device_t dev)
 576 {
 577         struct acpi_hp_softc *sc;
 578
 579         ACPI_FUNCTION_TRACE((char *)(uintptr_t) __func__);
 580         sc = device_get_softc(dev);
 581         if (sc->has_cmi && sc->hpcmi_open_pid != 0)
 582                 return (EBUSY);
 583
 584         if (sc->has_notify)
 585                 ACPI_WMI_REMOVE_EVENT_HANDLER(dev, ACPI_HP_WMI_EVENT_GUID);
 586
 587         if (sc->has_cmi) {
 588                 if (sc->hpcmi_bufptr != -1) {
 589                         sbuf_delete(&sc->hpcmi_sbuf);
 590                         sc->hpcmi_bufptr = -1;
 591                 }
 592                 sc->hpcmi_open_pid = 0;
 593                 destroy_dev(sc->hpcmi_dev_t);
 594         }
 595
 596         return (0);
 597 }
 598
 599 static int
 600 acpi_hp_sysctl(SYSCTL_HANDLER_ARGS)
 601 {
 602         struct acpi_hp_softc    *sc;
 603         int                     arg;
 604         int                     oldarg;
 605         int                     error = 0;
 606         int                     function;
 607         int                     method;
 608
 609         ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 610
 611         sc = (struct acpi_hp_softc *)oidp->oid_arg1;
 612         function = oidp->oid_arg2;
 613         method = acpi_hp_sysctls[function].method;
 614
 615         ACPI_SERIAL_BEGIN(hp);
 616         arg = acpi_hp_sysctl_get(sc, method);
 617         oldarg = arg;
 618         error = sysctl_handle_int(oidp, &arg, 0, req);
 619         if (!error && req->newptr != NULL) {
 620                 error = acpi_hp_sysctl_set(sc, method, arg, oldarg);
 621         }
 622         ACPI_SERIAL_END(hp);
 623
 624         return (error);
 625 }
 626
 627 static int
 628 acpi_hp_sysctl_get(struct acpi_hp_softc *sc, int method)
 629 {
 630         int     val = 0;
 631
 632         ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 633         ACPI_SERIAL_ASSERT(hp);
 634
 635         switch (method) {
 636         case ACPI_HP_METHOD_WLAN_ENABLED:
 637                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 638                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 639                 val = ((val & HP_MASK_WLAN_ENABLED) != 0);
 640                 break;
 641         case ACPI_HP_METHOD_WLAN_RADIO:
 642                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 643                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 644                 val = ((val & HP_MASK_WLAN_RADIO) != 0);
 645                 break;
 646         case ACPI_HP_METHOD_WLAN_ON_AIR:
 647                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 648                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 649                 val = ((val & HP_MASK_WLAN_ON_AIR) != 0);
 650                 break;
 651         case ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON:
 652                 val = sc->wlan_enable_if_radio_on;
 653                 break;
 654         case ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF:
 655                 val = sc->wlan_disable_if_radio_off;
 656                 break;
 657         case ACPI_HP_METHOD_BLUETOOTH_ENABLED:
 658                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 659                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 660                 val = ((val & HP_MASK_BLUETOOTH_ENABLED) != 0);
 661                 break;
 662         case ACPI_HP_METHOD_BLUETOOTH_RADIO:
 663                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 664                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 665                 val = ((val & HP_MASK_BLUETOOTH_RADIO) != 0);
 666                 break;
 667         case ACPI_HP_METHOD_BLUETOOTH_ON_AIR:
 668                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 669                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 670                 val = ((val & HP_MASK_BLUETOOTH_ON_AIR) != 0);
 671                 break;
 672         case ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON:
 673                 val = sc->bluetooth_enable_if_radio_on;
 674                 break;
 675         case ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF:
 676                 val = sc->bluetooth_disable_if_radio_off;
 677                 break;
 678         case ACPI_HP_METHOD_WWAN_ENABLED:
 679                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 680                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 681                 val = ((val & HP_MASK_WWAN_ENABLED) != 0);
 682                 break;
 683         case ACPI_HP_METHOD_WWAN_RADIO:
 684                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 685                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 686                 val = ((val & HP_MASK_WWAN_RADIO) != 0);
 687                 break;
 688         case ACPI_HP_METHOD_WWAN_ON_AIR:
 689                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 690                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 691                 val = ((val & HP_MASK_WWAN_ON_AIR) != 0);
 692                 break;
 693         case ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON:
 694                 val = sc->wwan_enable_if_radio_on;
 695                 break;
 696         case ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF:
 697                 val = sc->wwan_disable_if_radio_off;
 698                 break;
 699         case ACPI_HP_METHOD_ALS:
 700                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 701                         ACPI_HP_WMI_ALS_COMMAND, 0, 0);
 702                 break;
 703         case ACPI_HP_METHOD_DISPLAY:
 704                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 705                         ACPI_HP_WMI_DISPLAY_COMMAND, 0, 0);
 706                 break;
 707         case ACPI_HP_METHOD_HDDTEMP:
 708                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 709                         ACPI_HP_WMI_HDDTEMP_COMMAND, 0, 0);
 710                 break;
 711         case ACPI_HP_METHOD_DOCK:
 712                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 713                         ACPI_HP_WMI_DOCK_COMMAND, 0, 0);
 714                 break;
 715         case ACPI_HP_METHOD_CMI_DETAIL:
 716                 val = sc->cmi_detail;
 717                 break;
 718         case ACPI_HP_METHOD_VERBOSE:
 719                 val = sc->verbose;
 720                 break;
 721         }
 722
 723         return (val);
 724 }
 725
 726 static int
 727 acpi_hp_sysctl_set(struct acpi_hp_softc *sc, int method, int arg, int oldarg)
 728 {
 729         ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 730         ACPI_SERIAL_ASSERT(hp);
 731
 732         if (method != ACPI_HP_METHOD_CMI_DETAIL &&
 733             method != ACPI_HP_METHOD_VERBOSE)
 734                 arg = arg?1:0;
 735
 736         if (arg != oldarg) {
 737                 switch (method) {
 738                 case ACPI_HP_METHOD_WLAN_ENABLED:
 739                         return (acpi_hp_exec_wmi_command(sc->wmi_dev,
 740                                     ACPI_HP_WMI_WIRELESS_COMMAND, 1,
 741                                     arg?0x101:0x100));
 742                 case ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON:
 743                         sc->wlan_enable_if_radio_on = arg;
 744                         acpi_hp_evaluate_auto_on_off(sc);
 745                         break;
 746                 case ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF:
 747                         sc->wlan_disable_if_radio_off = arg;
 748                         acpi_hp_evaluate_auto_on_off(sc);
 749                         break;
 750                 case ACPI_HP_METHOD_BLUETOOTH_ENABLED:
 751                         return (acpi_hp_exec_wmi_command(sc->wmi_dev,
 752                                     ACPI_HP_WMI_WIRELESS_COMMAND, 1,
 753                                     arg?0x202:0x200));
 754                 case ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON:
 755                         sc->bluetooth_enable_if_radio_on = arg;
 756                         acpi_hp_evaluate_auto_on_off(sc);
 757                         break;
 758                 case ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF:
 759                         sc->bluetooth_disable_if_radio_off = arg?1:0;
 760                         acpi_hp_evaluate_auto_on_off(sc);
 761                         break;
 762                 case ACPI_HP_METHOD_WWAN_ENABLED:
 763                         return (acpi_hp_exec_wmi_command(sc->wmi_dev,
 764                                     ACPI_HP_WMI_WIRELESS_COMMAND, 1,
 765                                     arg?0x404:0x400));
 766                 case ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON:
 767                         sc->wwan_enable_if_radio_on = arg?1:0;
 768                         acpi_hp_evaluate_auto_on_off(sc);
 769                         break;
 770                 case ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF:
 771                         sc->wwan_disable_if_radio_off = arg?1:0;
 772                         acpi_hp_evaluate_auto_on_off(sc);
 773                         break;
 774                 case ACPI_HP_METHOD_ALS:
 775                         return (acpi_hp_exec_wmi_command(sc->wmi_dev,
 776                                     ACPI_HP_WMI_ALS_COMMAND, 1,
 777                                     arg?1:0));
 778                 case ACPI_HP_METHOD_CMI_DETAIL:
 779                         sc->cmi_detail = arg;
 780                         if ((arg & ACPI_HP_CMI_DETAIL_SHOW_MAX_INSTANCE) !=
 781                             (oldarg & ACPI_HP_CMI_DETAIL_SHOW_MAX_INSTANCE)) {
 782                             sc->cmi_order_size = -1;
 783                         }
 784                         break;
 785                 case ACPI_HP_METHOD_VERBOSE:
 786                         sc->verbose = arg;
 787                         break;
 788                 }
 789         }
 790
 791         return (0);
 792 }
 793
 794 static __inline void
 795 acpi_hp_free_buffer(ACPI_BUFFER* buf) {
 796         if (buf && buf->Pointer) {
 797                 AcpiOsFree(buf->Pointer);
 798         }
 799 }
 800
 801 static void
 802 acpi_hp_notify(ACPI_HANDLE h, UINT32 notify, void *context)
 803 {
 804         device_t dev = context;
 805         ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
 806
 807         struct acpi_hp_softc *sc = device_get_softc(dev);
 808         ACPI_BUFFER response = { ACPI_ALLOCATE_BUFFER, NULL };
 809         ACPI_OBJECT *obj;
 810         ACPI_WMI_GET_EVENT_DATA(sc->wmi_dev, notify, &response);
 811         obj = (ACPI_OBJECT*) response.Pointer;
 812         if (obj && obj->Type == ACPI_TYPE_BUFFER && obj->Buffer.Length == 8) {
 813                 if (*((UINT8 *) obj->Buffer.Pointer) == 0x5) {
 814                         acpi_hp_evaluate_auto_on_off(sc);
 815                 }
 816         }
 817         acpi_hp_free_buffer(&response);
 818 }
 819
 820 static int
 821 acpi_hp_exec_wmi_command(device_t wmi_dev, int command, int is_write, int val)
 822 {
 823         UINT32          params[5] = { 0x55434553,
 824                             is_write?2:1,
 825                             command,
 826                             is_write?4:0,
 827                             val};
 828         UINT32*         result;
 829         ACPI_OBJECT     *obj;
 830         ACPI_BUFFER     in = { sizeof(params), &params };
 831         ACPI_BUFFER     out = { ACPI_ALLOCATE_BUFFER, NULL };
 832         int retval;
 833
 834         if (ACPI_FAILURE(ACPI_WMI_EVALUATE_CALL(wmi_dev, ACPI_HP_WMI_BIOS_GUID,
 835                     0, 0x3, &in, &out))) {
 836                 acpi_hp_free_buffer(&out);
 837                 return (-EINVAL);
 838         }
 839         obj = out.Pointer;
 840         if (!obj || obj->Type != ACPI_TYPE_BUFFER) {
 841                 acpi_hp_free_buffer(&out);
 842                 return (-EINVAL);
 843         }
 844         result = (UINT32*) obj->Buffer.Pointer;
 845         retval = result[2];
 846         if (result[1] > 0) {
 847                 retval = result[1];
 848         }
 849         acpi_hp_free_buffer(&out);
 850
 851         return (retval);
 852 }
 853
 854 static __inline char*
 855 acpi_hp_get_string_from_object(ACPI_OBJECT* obj, char* dst, size_t size) {
 856         int     length;
 857
 858         dst[0] = 0;
 859         if (obj->Type == ACPI_TYPE_STRING) {
 860                 length = obj->String.Length+1;
 861                 if (length > size) {
 862                         length = size - 1;
 863                 }
 864                 strlcpy(dst, obj->String.Pointer, length);
 865                 acpi_hp_hex_decode(dst);
 866         }
 867
 868         return (dst);
 869 }
 870
 871
 872 /*
 873  * Read BIOS Setting block in instance "instance".
 874  * The block returned is ACPI_TYPE_PACKAGE which should contain the following
 875  * elements:
 876  * Index Meaning
 877  * 0        Setting Name [string]
 878  * 1        Value (comma separated, asterisk marks the current value) [string]
 879  * 2        Path within the bios hierarchy [string]
 880  * 3        IsReadOnly [int]
 881  * 4        DisplayInUI [int]
 882  * 5        RequiresPhysicalPresence [int]
 883  * 6        Sequence for ordering within the bios settings (absolute) [int]
 884  * 7        Length of prerequisites array [int]
 885  * 8..8+[7] PrerequisiteN [string]
 886  * 9+[7]    Current value (in case of enum) [string] / Array length [int]
 887  * 10+[7]   Enum length [int] / Array values
 888  * 11+[7]ff Enum value at index x [string]
 889  */
 890 static int
 891 acpi_hp_get_cmi_block(device_t wmi_dev, const char* guid, UINT8 instance,
 892     char* outbuf, size_t outsize, UINT32* sequence, int detail)
 893 {
 894         ACPI_OBJECT     *obj;
 895         ACPI_BUFFER     out = { ACPI_ALLOCATE_BUFFER, NULL };
 896         int             i;
 897         int             outlen;
 898         int             size = 255;
 899         int             has_enums = 0;
 900         int             valuebase = 0;
 901         char            string_buffer[size];
 902         int             enumbase;
 903
 904         outlen = 0;
 905         outbuf[0] = 0;
 906         if (ACPI_FAILURE(ACPI_WMI_GET_BLOCK(wmi_dev, guid, instance, &out))) {
 907                 acpi_hp_free_buffer(&out);
 908                 return (-EINVAL);
 909         }
 910         obj = out.Pointer;
 911         if (!obj || obj->Type != ACPI_TYPE_PACKAGE) {
 912                 acpi_hp_free_buffer(&out);
 913                 return (-EINVAL);
 914         }
 915
 916         if (obj->Package.Count >= 8 &&
 917             obj->Package.Elements[7].Type == ACPI_TYPE_INTEGER) {
 918             valuebase = 8 + obj->Package.Elements[7].Integer.Value;
 919         }
 920
 921         /* check if this matches our expectations based on limited knowledge */
 922         if (valuebase > 7 && obj->Package.Count > valuebase + 1 &&
 923             obj->Package.Elements[0].Type == ACPI_TYPE_STRING &&
 924             obj->Package.Elements[1].Type == ACPI_TYPE_STRING &&
 925             obj->Package.Elements[2].Type == ACPI_TYPE_STRING &&
 926             obj->Package.Elements[3].Type == ACPI_TYPE_INTEGER &&
 927             obj->Package.Elements[4].Type == ACPI_TYPE_INTEGER &&
 928             obj->Package.Elements[5].Type == ACPI_TYPE_INTEGER &&
 929             obj->Package.Elements[6].Type == ACPI_TYPE_INTEGER &&
 930             obj->Package.Elements[valuebase].Type == ACPI_TYPE_STRING &&
 931             obj->Package.Elements[valuebase+1].Type == ACPI_TYPE_INTEGER &&
 932             obj->Package.Count > valuebase +
 933                 obj->Package.Elements[valuebase+1].Integer.Value
 934            ) {
 935                 enumbase = valuebase + 1;
 936                 if (detail & ACPI_HP_CMI_DETAIL_PATHS) {
 937                         strlcat(outbuf, acpi_hp_get_string_from_object(
 938                                 &obj->Package.Elements[2], string_buffer, size),
 939                                 outsize);
 940                         outlen += 48;
 941                         while (strlen(outbuf) < outlen)
 942                                 strlcat(outbuf, " ", outsize);
 943                 }
 944                 strlcat(outbuf, acpi_hp_get_string_from_object(
 945                                 &obj->Package.Elements[0], string_buffer, size),
 946                                 outsize);
 947                 outlen += 43;
 948                 while (strlen(outbuf) < outlen)
 949                         strlcat(outbuf, " ", outsize);
 950                 strlcat(outbuf, acpi_hp_get_string_from_object(
 951                                 &obj->Package.Elements[valuebase], string_buffer,
 952                                 size),
 953                                 outsize);
 954                 outlen += 21;
 955                 while (strlen(outbuf) < outlen)
 956                         strlcat(outbuf, " ", outsize);
 957                 for (i = 0; i < strlen(outbuf); ++i)
 958                         if (outbuf[i] == '\\')
 959                                 outbuf[i] = '/';
 960                 if (detail & ACPI_HP_CMI_DETAIL_ENUMS) {
 961                         for (i = enumbase + 1; i < enumbase + 1 +
 962                             obj->Package.Elements[enumbase].Integer.Value;
 963                             ++i) {
 964                                 acpi_hp_get_string_from_object(
 965                                     &obj->Package.Elements[i], string_buffer,
 966                                     size);
 967                                 if (strlen(string_buffer) > 1 ||
 968                                     (strlen(string_buffer) == 1 &&
 969                                     string_buffer[0] != ' ')) {
 970                                         if (has_enums)
 971                                                 strlcat(outbuf, "/", outsize);
 972                                         else
 973                                                 strlcat(outbuf, " (", outsize);
 974                                         strlcat(outbuf, string_buffer, outsize);
 975                                         has_enums = 1;
 976                                 }
 977                         }
 978                 }
 979                 if (has_enums)
 980                         strlcat(outbuf, ")", outsize);
 981                 if (detail & ACPI_HP_CMI_DETAIL_FLAGS) {
 982                         strlcat(outbuf, obj->Package.Elements[3].Integer.Value?
 983                             " [ReadOnly]":"", outsize);
 984                         strlcat(outbuf, obj->Package.Elements[4].Integer.Value?
 985                             "":" [NOUI]", outsize);
 986                         strlcat(outbuf, obj->Package.Elements[5].Integer.Value?
 987                             " [RPP]":"", outsize);
 988                 }
 989                 *sequence = (UINT32) obj->Package.Elements[6].Integer.Value;
 990         }
 991         acpi_hp_free_buffer(&out);
 992
 993         return (0);
 994 }
 995
 996
 997
 998 /*
 999  * Convert given two digit hex string (hexin) to an UINT8 referenced
1000  * by byteout.
1001  * Return != 0 if the was a problem (invalid input)
1002  */
1003 static __inline int acpi_hp_hex_to_int(const UINT8 *hexin, UINT8 *byteout)
1004 {
1005         unsigned int    hi;
1006         unsigned int    lo;
1007
1008         hi = hexin[0];
1009         lo = hexin[1];
1010         if ('0' <= hi && hi <= '9')
1011                 hi -= '0';
1012         else if ('A' <= hi && hi <= 'F')
1013                 hi -= ('A' - 10);
1014         else if ('a' <= hi && hi <= 'f')
1015                 hi -= ('a' - 10);
1016         else
1017                 return (1);
1018         if ('0' <= lo && lo <= '9')
1019                 lo -= '0';
1020         else if ('A' <= lo && lo <= 'F')
1021                 lo -= ('A' - 10);
1022         else if ('a' <= lo && lo <= 'f')
1023                 lo -= ('a' - 10);
1024         else
1025                 return (1);
1026         *byteout = (hi << 4) + lo;
1027
1028         return (0);
1029 }
1030
1031
1032 static void
1033 acpi_hp_hex_decode(char* buffer)
1034 {
1035         int     i;
1036         int     length = strlen(buffer);
1037         UINT8   *uin;
1038         UINT8   uout;
1039
1040         if (((int)length/2)*2 == length || length < 10) return;
1041
1042         for (i = 0; i<length; ++i) {
1043                 if (!((i+1)%3)) {
1044                         if (buffer[i] != ' ')
1045                                 return;
1046                 }
1047                 else
1048                         if (!((buffer[i] >= '0' && buffer[i] <= '9') ||
1049                             (buffer[i] >= 'A' && buffer[i] <= 'F')))
1050                                 return;
1051         }
1052
1053         for (i = 0; i<length; i += 3) {
1054                 uin = &buffer[i];
1055                 uout = 0;
1056                 acpi_hp_hex_to_int(uin, &uout);
1057                 buffer[i/3] = (char) uout;
1058         }
1059         buffer[(length+1)/3] = 0;
1060 }
1061
1062
1063 /*
1064  * open hpcmi device
1065  */
1066 static int
1067 acpi_hp_hpcmi_open(struct cdev* dev, int flags, int mode, struct thread *td)
1068 {
1069         struct acpi_hp_softc    *sc;
1070         int                     ret;
1071
1072         if (dev == NULL || dev->si_drv1 == NULL)
1073                 return (EBADF);
1074         sc = dev->si_drv1;
1075
1076         ACPI_SERIAL_BEGIN(hp);
1077         if (sc->hpcmi_open_pid != 0) {
1078                 ret = EBUSY;
1079         }
1080         else {
1081                 if (sbuf_new(&sc->hpcmi_sbuf, NULL, 4096, SBUF_AUTOEXTEND)
1082                     == NULL) {
1083                         ret = ENXIO;
1084                 } else {
1085                         sc->hpcmi_open_pid = td->td_proc->p_pid;
1086                         sc->hpcmi_bufptr = 0;
1087                         ret = 0;
1088                 }
1089         }
1090         ACPI_SERIAL_END(hp);
1091
1092         return (ret);
1093 }
1094
1095 /*
1096  * close hpcmi device
1097  */
1098 static int
1099 acpi_hp_hpcmi_close(struct cdev* dev, int flags, int mode, struct thread *td)
1100 {
1101         struct acpi_hp_softc    *sc;
1102         int                     ret;
1103
1104         if (dev == NULL || dev->si_drv1 == NULL)
1105                 return (EBADF);
1106         sc = dev->si_drv1;
1107
1108         ACPI_SERIAL_BEGIN(hp);
1109         if (sc->hpcmi_open_pid == 0) {
1110                 ret = EBADF;
1111         }
1112         else {
1113                 if (sc->hpcmi_bufptr != -1) {
1114                         sbuf_delete(&sc->hpcmi_sbuf);
1115                         sc->hpcmi_bufptr = -1;
1116                 }
1117                 sc->hpcmi_open_pid = 0;
1118                 ret = 0;
1119         }
1120         ACPI_SERIAL_END(hp);
1121
1122         return (ret);
1123 }
1124
1125 /*
1126  * Read from hpcmi bios information
1127  */
1128 static int
1129 acpi_hp_hpcmi_read(struct cdev *dev, struct uio *buf, int flag)
1130 {
1131         struct acpi_hp_softc    *sc;
1132         int                     pos, i, l, ret;
1133         UINT8                   instance;
1134         UINT8                   maxInstance;
1135         UINT32                  sequence;
1136         int                     linesize = 1025;
1137         char                    line[linesize];
1138
1139         if (dev == NULL || dev->si_drv1 == NULL)
1140                 return (EBADF);
1141         sc = dev->si_drv1;
1142
1143         ACPI_SERIAL_BEGIN(hp);
1144         if (sc->hpcmi_open_pid != buf->uio_td->td_proc->p_pid
1145             || sc->hpcmi_bufptr == -1) {
1146                 ret = EBADF;
1147         }
1148         else {
1149                 if (!sbuf_done(&sc->hpcmi_sbuf)) {
1150                         if (sc->cmi_order_size < 0) {
1151                                 maxInstance = sc->has_cmi;
1152                                 if (!(sc->cmi_detail &
1153                                     ACPI_HP_CMI_DETAIL_SHOW_MAX_INSTANCE) &&
1154                                     maxInstance > 0) {
1155                                         maxInstance--;
1156                                 }
1157                                 sc->cmi_order_size = 0;
1158                                 for (instance = 0; instance < maxInstance;
1159                                     ++instance) {
1160                                         if (acpi_hp_get_cmi_block(sc->wmi_dev,
1161                                                 ACPI_HP_WMI_CMI_GUID, instance,
1162                                                 line, linesize, &sequence,
1163                                                 sc->cmi_detail)) {
1164                                                 instance = maxInstance;
1165                                         }
1166                                         else {
1167                                                 pos = sc->cmi_order_size;
1168                                                 for (i=0;
1169                                                   i<sc->cmi_order_size && i<127;
1170                                                      ++i) {
1171                                 if (sc->cmi_order[i].sequence > sequence) {
1172                                                                 pos = i;
1173                                                                 break;
1174                                                         }
1175                                                 }
1176                                                 for (i=sc->cmi_order_size;
1177                                                     i>pos;
1178                                                     --i) {
1179                                                 sc->cmi_order[i].sequence =
1180                                                     sc->cmi_order[i-1].sequence;
1181                                                 sc->cmi_order[i].instance =
1182                                                     sc->cmi_order[i-1].instance;
1183                                                 }
1184                                                 sc->cmi_order[pos].sequence =
1185                                                     sequence;
1186                                                 sc->cmi_order[pos].instance =
1187                                                     instance;
1188                                                 sc->cmi_order_size++;
1189                                         }
1190                                 }
1191                         }
1192                         for (i=0; i<sc->cmi_order_size; ++i) {
1193                                 if (!acpi_hp_get_cmi_block(sc->wmi_dev,
1194                                     ACPI_HP_WMI_CMI_GUID,
1195                                     sc->cmi_order[i].instance, line, linesize,
1196                                     &sequence, sc->cmi_detail)) {
1197                                         sbuf_printf(&sc->hpcmi_sbuf, "%s\n", line);
1198                                 }
1199                         }
1200                         sbuf_finish(&sc->hpcmi_sbuf);
1201                 }
1202                 if (sbuf_len(&sc->hpcmi_sbuf) <= 0) {
1203                         sbuf_delete(&sc->hpcmi_sbuf);
1204                         sc->hpcmi_bufptr = -1;
1205                         sc->hpcmi_open_pid = 0;
1206                         ret = ENOMEM;
1207                 } else {
1208                         l = min(buf->uio_resid, sbuf_len(&sc->hpcmi_sbuf) -
1209                             sc->hpcmi_bufptr);
1210                         ret = (l > 0)?uiomove(sbuf_data(&sc->hpcmi_sbuf) +
1211                             sc->hpcmi_bufptr, l, buf) : 0;
1212                         sc->hpcmi_bufptr += l;
1213                 }
1214         }
1215         ACPI_SERIAL_END(hp);
1216
1217         return (ret);
1218 }