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