Logo Search packages:      
Sourcecode: linux version File versions  Download package

thinkpad_acpi.c

/*
 *  thinkpad_acpi.c - ThinkPad ACPI Extras
 *
 *
 *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
 *  Copyright (C) 2006-2007 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 *  02110-1301, USA.
 */

#define IBM_VERSION "0.17"
#define TPACPI_SYSFS_VERSION 0x020000

/*
 *  Changelog:
 *  2007-03-27  0.14    renamed to thinkpad_acpi and moved to
 *                drivers/misc.
 *
 *  2006-11-22    0.13  new maintainer
 *                changelog now lives in git commit history, and will
 *                not be updated further in-file.
 *
 *  2005-08-17  0.12    fix compilation on 2.6.13-rc kernels
 *  2005-03-17    0.11  support for 600e, 770x
 *                    thanks to Jamie Lentin <lentinj@dial.pipex.com>
 *                support for 770e, G41
 *                G40 and G41 don't have a thinklight
 *                temperatures no longer experimental
 *                experimental brightness control
 *                experimental volume control
 *                experimental fan enable/disable
 *  2005-01-16    0.10  fix module loading on R30, R31
 *  2005-01-16    0.9   support for 570, R30, R31
 *                ultrabay support on A22p, A3x
 *                limit arg for cmos, led, beep, drop experimental status
 *                more capable led control on A21e, A22p, T20-22, X20
 *                experimental temperatures and fan speed
 *                experimental embedded controller register dump
 *                mark more functions as __init, drop incorrect __exit
 *                use MODULE_VERSION
 *                    thanks to Henrik Brix Andersen <brix@gentoo.org>
 *                fix parameter passing on module loading
 *                    thanks to Rusty Russell <rusty@rustcorp.com.au>
 *                    thanks to Jim Radford <radford@blackbean.org>
 *  2004-11-08    0.8   fix init error case, don't return from a macro
 *                    thanks to Chris Wright <chrisw@osdl.org>
 *  2004-10-23    0.7   fix module loading on A21e, A22p, T20, T21, X20
 *                fix led control on A21e
 *  2004-10-19    0.6   use acpi_bus_register_driver() to claim HKEY device
 *  2004-10-18    0.5   thinklight support on A21e, G40, R32, T20, T21, X20
 *                proc file format changed
 *                video_switch command
 *                experimental cmos control
 *                experimental led control
 *                experimental acpi sounds
 *  2004-09-16    0.4   support for module parameters
 *                hotkey mask can be prefixed by 0x
 *                video output switching
 *                video expansion control
 *                ultrabay eject support
 *                removed lcd brightness/on/off control, didn't work
 *  2004-08-17    0.3   support for R40
 *                lcd off, brightness control
 *                thinklight on/off
 *  2004-08-14    0.2   support for T series, X20
 *                bluetooth enable/disable
 *                hotkey events disabled by default
 *                removed fan control, currently useless
 *  2004-08-09    0.1   initial release, support for X series
 */

#include "thinkpad_acpi.h"

MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
MODULE_DESCRIPTION(IBM_DESC);
MODULE_VERSION(IBM_VERSION);
MODULE_LICENSE("GPL");

/* Please remove this in year 2009 */
MODULE_ALIAS("ibm_acpi");

/*
 * DMI matching for module autoloading
 *
 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
 *
 * Only models listed in thinkwiki will be supported, so add yours
 * if it is not there yet.
 */
#define IBM_BIOS_MODULE_ALIAS(__type) \
      MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")

/* Non-ancient thinkpads */
MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");

/* Ancient thinkpad BIOSes have to be identified by
 * BIOS type or model number, and there are far less
 * BIOS types than model numbers... */
IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");

#define __unused __attribute__ ((unused))

static enum {
      TPACPI_LIFE_INIT = 0,
      TPACPI_LIFE_RUNNING,
      TPACPI_LIFE_EXITING,
} tpacpi_lifecycle;

/****************************************************************************
 ****************************************************************************
 *
 * ACPI Helpers and device model
 *
 ****************************************************************************
 ****************************************************************************/

/*************************************************************************
 * ACPI basic handles
 */

static acpi_handle root_handle;

#define IBM_HANDLE(object, parent, paths...)                \
      static acpi_handle  object##_handle;                  \
      static acpi_handle *object##_parent = &parent##_handle;     \
      static char        *object##_path;              \
      static char        *object##_paths[] = { paths }

IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",      /* 240, 240x */
         "\\_SB.PCI.ISA.EC",  /* 570 */
         "\\_SB.PCI0.ISA0.EC0",     /* 600e/x, 770e, 770x */
         "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
         "\\_SB.PCI0.AD4S.EC0",     /* i1400, R30 */
         "\\_SB.PCI0.ICH3.EC0",     /* R31 */
         "\\_SB.PCI0.LPC.EC", /* all others */
         );

IBM_HANDLE(ecrd, ec, "ECRD"); /* 570 */
IBM_HANDLE(ecwr, ec, "ECWR"); /* 570 */


/*************************************************************************
 * Misc ACPI handles
 */

IBM_HANDLE(cmos, root, "\\UCMS",    /* R50, R50e, R50p, R51, T4x, X31, X40 */
         "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
         "\\CMS",       /* R40, R40e */
         );             /* all others */

IBM_HANDLE(hkey, ec, "\\_SB.HKEY",  /* 600e/x, 770e, 770x */
         "^HKEY",       /* R30, R31 */
         "HKEY",        /* all others */
         );             /* 570 */


/*************************************************************************
 * ACPI helpers
 */

static int acpi_evalf(acpi_handle handle,
                  void *res, char *method, char *fmt, ...)
{
      char *fmt0 = fmt;
      struct acpi_object_list params;
      union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
      struct acpi_buffer result, *resultp;
      union acpi_object out_obj;
      acpi_status status;
      va_list ap;
      char res_type;
      int success;
      int quiet;

      if (!*fmt) {
            printk(IBM_ERR "acpi_evalf() called with empty format\n");
            return 0;
      }

      if (*fmt == 'q') {
            quiet = 1;
            fmt++;
      } else
            quiet = 0;

      res_type = *(fmt++);

      params.count = 0;
      params.pointer = &in_objs[0];

      va_start(ap, fmt);
      while (*fmt) {
            char c = *(fmt++);
            switch (c) {
            case 'd':   /* int */
                  in_objs[params.count].integer.value = va_arg(ap, int);
                  in_objs[params.count++].type = ACPI_TYPE_INTEGER;
                  break;
                  /* add more types as needed */
            default:
                  printk(IBM_ERR "acpi_evalf() called "
                         "with invalid format character '%c'\n", c);
                  return 0;
            }
      }
      va_end(ap);

      if (res_type != 'v') {
            result.length = sizeof(out_obj);
            result.pointer = &out_obj;
            resultp = &result;
      } else
            resultp = NULL;

      status = acpi_evaluate_object(handle, method, &params, resultp);

      switch (res_type) {
      case 'd':         /* int */
            if (res)
                  *(int *)res = out_obj.integer.value;
            success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
            break;
      case 'v':         /* void */
            success = status == AE_OK;
            break;
            /* add more types as needed */
      default:
            printk(IBM_ERR "acpi_evalf() called "
                   "with invalid format character '%c'\n", res_type);
            return 0;
      }

      if (!success && !quiet)
            printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
                   method, fmt0, status);

      return success;
}

static void __unused acpi_print_int(acpi_handle handle, char *method)
{
      int i;

      if (acpi_evalf(handle, &i, method, "d"))
            printk(IBM_INFO "%s = 0x%x\n", method, i);
      else
            printk(IBM_ERR "error calling %s\n", method);
}

static int acpi_ec_read(int i, u8 * p)
{
      int v;

      if (ecrd_handle) {
            if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
                  return 0;
            *p = v;
      } else {
            if (ec_read(i, p) < 0)
                  return 0;
      }

      return 1;
}

static int acpi_ec_write(int i, u8 v)
{
      if (ecwr_handle) {
            if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
                  return 0;
      } else {
            if (ec_write(i, v) < 0)
                  return 0;
      }

      return 1;
}

static int _sta(acpi_handle handle)
{
      int status;

      if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
            status = 0;

      return status;
}

static int issue_thinkpad_cmos_command(int cmos_cmd)
{
      if (!cmos_handle)
            return -ENXIO;

      if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
            return -EIO;

      return 0;
}

/*************************************************************************
 * ACPI device model
 */

static void drv_acpi_handle_init(char *name,
                     acpi_handle *handle, acpi_handle parent,
                     char **paths, int num_paths, char **path)
{
      int i;
      acpi_status status;

      vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
            name);

      for (i = 0; i < num_paths; i++) {
            status = acpi_get_handle(parent, paths[i], handle);
            if (ACPI_SUCCESS(status)) {
                  *path = paths[i];
                  dbg_printk(TPACPI_DBG_INIT,
                           "Found ACPI handle %s for %s\n",
                           *path, name);
                  return;
            }
      }

      vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
                name);
      *handle = NULL;
}

static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
{
      struct ibm_struct *ibm = data;

      if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
            return;

      if (!ibm || !ibm->acpi || !ibm->acpi->notify)
            return;

      ibm->acpi->notify(ibm, event);
}

static int __init setup_acpi_notify(struct ibm_struct *ibm)
{
      acpi_status status;
      int rc;

      BUG_ON(!ibm->acpi);

      if (!*ibm->acpi->handle)
            return 0;

      vdbg_printk(TPACPI_DBG_INIT,
            "setting up ACPI notify for %s\n", ibm->name);

      rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
      if (rc < 0) {
            printk(IBM_ERR "acpi_bus_get_device(%s) failed: %d\n",
                  ibm->name, rc);
            return -ENODEV;
      }

      acpi_driver_data(ibm->acpi->device) = ibm;
      sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
            IBM_ACPI_EVENT_PREFIX,
            ibm->name);

      status = acpi_install_notify_handler(*ibm->acpi->handle,
                  ibm->acpi->type, dispatch_acpi_notify, ibm);
      if (ACPI_FAILURE(status)) {
            if (status == AE_ALREADY_EXISTS) {
                  printk(IBM_NOTICE "another device driver is already handling %s events\n",
                        ibm->name);
            } else {
                  printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
                        ibm->name, status);
            }
            return -ENODEV;
      }
      ibm->flags.acpi_notify_installed = 1;
      return 0;
}

static int __init tpacpi_device_add(struct acpi_device *device)
{
      return 0;
}

static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
{
      int rc;

      dbg_printk(TPACPI_DBG_INIT,
            "registering %s as an ACPI driver\n", ibm->name);

      BUG_ON(!ibm->acpi);

      ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
      if (!ibm->acpi->driver) {
            printk(IBM_ERR "kzalloc(ibm->driver) failed\n");
            return -ENOMEM;
      }

      sprintf(ibm->acpi->driver->name, "%s_%s", IBM_NAME, ibm->name);
      ibm->acpi->driver->ids = ibm->acpi->hid;

      ibm->acpi->driver->ops.add = &tpacpi_device_add;

      rc = acpi_bus_register_driver(ibm->acpi->driver);
      if (rc < 0) {
            printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
                   ibm->name, rc);
            kfree(ibm->acpi->driver);
            ibm->acpi->driver = NULL;
      } else if (!rc)
            ibm->flags.acpi_driver_registered = 1;

      return rc;
}


/****************************************************************************
 ****************************************************************************
 *
 * Procfs Helpers
 *
 ****************************************************************************
 ****************************************************************************/

static int dispatch_procfs_read(char *page, char **start, off_t off,
                  int count, int *eof, void *data)
{
      struct ibm_struct *ibm = data;
      int len;

      if (!ibm || !ibm->read)
            return -EINVAL;

      len = ibm->read(page);
      if (len < 0)
            return len;

      if (len <= off + count)
            *eof = 1;
      *start = page + off;
      len -= off;
      if (len > count)
            len = count;
      if (len < 0)
            len = 0;

      return len;
}

static int dispatch_procfs_write(struct file *file,
                  const char __user * userbuf,
                  unsigned long count, void *data)
{
      struct ibm_struct *ibm = data;
      char *kernbuf;
      int ret;

      if (!ibm || !ibm->write)
            return -EINVAL;

      kernbuf = kmalloc(count + 2, GFP_KERNEL);
      if (!kernbuf)
            return -ENOMEM;

      if (copy_from_user(kernbuf, userbuf, count)) {
            kfree(kernbuf);
            return -EFAULT;
      }

      kernbuf[count] = 0;
      strcat(kernbuf, ",");
      ret = ibm->write(kernbuf);
      if (ret == 0)
            ret = count;

      kfree(kernbuf);

      return ret;
}

static char *next_cmd(char **cmds)
{
      char *start = *cmds;
      char *end;

      while ((end = strchr(start, ',')) && end == start)
            start = end + 1;

      if (!end)
            return NULL;

      *end = 0;
      *cmds = end + 1;
      return start;
}


/****************************************************************************
 ****************************************************************************
 *
 * Device model: input, hwmon and platform
 *
 ****************************************************************************
 ****************************************************************************/

static struct platform_device *tpacpi_pdev;
static struct platform_device *tpacpi_sensors_pdev;
static struct device *tpacpi_hwmon;
static struct input_dev *tpacpi_inputdev;
static struct mutex tpacpi_inputdev_send_mutex;


static int tpacpi_resume_handler(struct platform_device *pdev)
{
      struct ibm_struct *ibm, *itmp;

      list_for_each_entry_safe(ibm, itmp,
                         &tpacpi_all_drivers,
                         all_drivers) {
            if (ibm->resume)
                  (ibm->resume)();
      }

      return 0;
}

static struct platform_driver tpacpi_pdriver = {
      .driver = {
            .name = IBM_DRVR_NAME,
            .owner = THIS_MODULE,
      },
      .resume = tpacpi_resume_handler,
};

static struct platform_driver tpacpi_hwmon_pdriver = {
      .driver = {
            .name = IBM_HWMON_DRVR_NAME,
            .owner = THIS_MODULE,
      },
};

/*************************************************************************
 * thinkpad-acpi driver attributes
 */

/* interface_version --------------------------------------------------- */
static ssize_t tpacpi_driver_interface_version_show(
                        struct device_driver *drv,
                        char *buf)
{
      return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
}

static DRIVER_ATTR(interface_version, S_IRUGO,
            tpacpi_driver_interface_version_show, NULL);

/* debug_level --------------------------------------------------------- */
static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
                                    char *buf)
{
      return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
}

static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
                                    const char *buf, size_t count)
{
      unsigned long t;

      if (parse_strtoul(buf, 0xffff, &t))
            return -EINVAL;

      dbg_level = t;

      return count;
}

static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
            tpacpi_driver_debug_show, tpacpi_driver_debug_store);

/* version ------------------------------------------------------------- */
static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
                                    char *buf)
{
      return snprintf(buf, PAGE_SIZE, "%s v%s\n", IBM_DESC, IBM_VERSION);
}

static DRIVER_ATTR(version, S_IRUGO,
            tpacpi_driver_version_show, NULL);

/* --------------------------------------------------------------------- */

static struct driver_attribute* tpacpi_driver_attributes[] = {
      &driver_attr_debug_level, &driver_attr_version,
      &driver_attr_interface_version,
};

static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
{
      int i, res;

      i = 0;
      res = 0;
      while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
            res = driver_create_file(drv, tpacpi_driver_attributes[i]);
            i++;
      }

      return res;
}

static void tpacpi_remove_driver_attributes(struct device_driver *drv)
{
      int i;

      for(i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
            driver_remove_file(drv, tpacpi_driver_attributes[i]);
}

/*************************************************************************
 * sysfs support helpers
 */

struct attribute_set_obj {
      struct attribute_set s;
      struct attribute *a;
} __attribute__((packed));

static struct attribute_set *create_attr_set(unsigned int max_members,
                                    const char* name)
{
      struct attribute_set_obj *sobj;

      if (max_members == 0)
            return NULL;

      /* Allocates space for implicit NULL at the end too */
      sobj = kzalloc(sizeof(struct attribute_set_obj) +
                max_members * sizeof(struct attribute *),
                GFP_KERNEL);
      if (!sobj)
            return NULL;
      sobj->s.max_members = max_members;
      sobj->s.group.attrs = &sobj->a;
      sobj->s.group.name = name;

      return &sobj->s;
}

/* not multi-threaded safe, use it in a single thread per set */
static int add_to_attr_set(struct attribute_set* s, struct attribute *attr)
{
      if (!s || !attr)
            return -EINVAL;

      if (s->members >= s->max_members)
            return -ENOMEM;

      s->group.attrs[s->members] = attr;
      s->members++;

      return 0;
}

static int add_many_to_attr_set(struct attribute_set* s,
                  struct attribute **attr,
                  unsigned int count)
{
      int i, res;

      for (i = 0; i < count; i++) {
            res = add_to_attr_set(s, attr[i]);
            if (res)
                  return res;
      }

      return 0;
}

static void delete_attr_set(struct attribute_set* s, struct kobject *kobj)
{
      sysfs_remove_group(kobj, &s->group);
      destroy_attr_set(s);
}

static int parse_strtoul(const char *buf,
            unsigned long max, unsigned long *value)
{
      char *endp;

      while (*buf && isspace(*buf))
            buf++;
      *value = simple_strtoul(buf, &endp, 0);
      while (*endp && isspace(*endp))
            endp++;
      if (*endp || *value > max)
            return -EINVAL;

      return 0;
}

/****************************************************************************
 ****************************************************************************
 *
 * Subdrivers
 *
 ****************************************************************************
 ****************************************************************************/

/*************************************************************************
 * thinkpad-acpi init subdriver
 */

static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
{
      printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
      printk(IBM_INFO "%s\n", IBM_URL);

      printk(IBM_INFO "ThinkPad BIOS %s, EC %s\n",
            (thinkpad_id.bios_version_str) ?
                  thinkpad_id.bios_version_str : "unknown",
            (thinkpad_id.ec_version_str) ?
                  thinkpad_id.ec_version_str : "unknown");

      if (thinkpad_id.vendor && thinkpad_id.model_str)
            printk(IBM_INFO "%s %s\n",
                  (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
                        "IBM" : ((thinkpad_id.vendor ==
                                    PCI_VENDOR_ID_LENOVO) ?
                              "Lenovo" : "Unknown vendor"),
                  thinkpad_id.model_str);

      return 0;
}

static int thinkpad_acpi_driver_read(char *p)
{
      int len = 0;

      len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
      len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);

      return len;
}

static struct ibm_struct thinkpad_acpi_driver_data = {
      .name = "driver",
      .read = thinkpad_acpi_driver_read,
};

/*************************************************************************
 * Hotkey subdriver
 */

static int hotkey_orig_status;
static u32 hotkey_orig_mask;
static u32 hotkey_all_mask;
static u32 hotkey_reserved_mask;

static u16 *hotkey_keycode_map;

static struct attribute_set *hotkey_dev_attributes;

static int hotkey_get_wlsw(int *status)
{
      if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
            return -EIO;
      return 0;
}

/* sysfs hotkey enable ------------------------------------------------- */
static ssize_t hotkey_enable_show(struct device *dev,
                     struct device_attribute *attr,
                     char *buf)
{
      int res, status;
      u32 mask;

      res = hotkey_get(&status, &mask);
      if (res)
            return res;

      return snprintf(buf, PAGE_SIZE, "%d\n", status);
}

static ssize_t hotkey_enable_store(struct device *dev,
                      struct device_attribute *attr,
                      const char *buf, size_t count)
{
      unsigned long t;
      int res, status;
      u32 mask;

      if (parse_strtoul(buf, 1, &t))
            return -EINVAL;

      res = hotkey_get(&status, &mask);
      if (!res)
            res = hotkey_set(t, mask);

      return (res) ? res : count;
}

static struct device_attribute dev_attr_hotkey_enable =
      __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
            hotkey_enable_show, hotkey_enable_store);

/* sysfs hotkey mask --------------------------------------------------- */
static ssize_t hotkey_mask_show(struct device *dev,
                     struct device_attribute *attr,
                     char *buf)
{
      int res, status;
      u32 mask;

      res = hotkey_get(&status, &mask);
      if (res)
            return res;

      return snprintf(buf, PAGE_SIZE, "0x%08x\n", mask);
}

static ssize_t hotkey_mask_store(struct device *dev,
                      struct device_attribute *attr,
                      const char *buf, size_t count)
{
      unsigned long t;
      int res, status;
      u32 mask;

      if (parse_strtoul(buf, 0xffffffffUL, &t))
            return -EINVAL;

      res = hotkey_get(&status, &mask);
      if (!res)
            hotkey_set(status, t);

      return (res) ? res : count;
}

static struct device_attribute dev_attr_hotkey_mask =
      __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
            hotkey_mask_show, hotkey_mask_store);

/* sysfs hotkey bios_enabled ------------------------------------------- */
static ssize_t hotkey_bios_enabled_show(struct device *dev,
                     struct device_attribute *attr,
                     char *buf)
{
      return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
}

static struct device_attribute dev_attr_hotkey_bios_enabled =
      __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);

/* sysfs hotkey bios_mask ---------------------------------------------- */
static ssize_t hotkey_bios_mask_show(struct device *dev,
                     struct device_attribute *attr,
                     char *buf)
{
      return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
}

static struct device_attribute dev_attr_hotkey_bios_mask =
      __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);

/* sysfs hotkey all_mask ----------------------------------------------- */
static ssize_t hotkey_all_mask_show(struct device *dev,
                     struct device_attribute *attr,
                     char *buf)
{
      return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_all_mask);
}

static struct device_attribute dev_attr_hotkey_all_mask =
      __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);

/* sysfs hotkey recommended_mask --------------------------------------- */
static ssize_t hotkey_recommended_mask_show(struct device *dev,
                                  struct device_attribute *attr,
                                  char *buf)
{
      return snprintf(buf, PAGE_SIZE, "0x%08x\n",
                  hotkey_all_mask & ~hotkey_reserved_mask);
}

static struct device_attribute dev_attr_hotkey_recommended_mask =
      __ATTR(hotkey_recommended_mask, S_IRUGO,
            hotkey_recommended_mask_show, NULL);

/* sysfs hotkey radio_sw ----------------------------------------------- */
static ssize_t hotkey_radio_sw_show(struct device *dev,
                     struct device_attribute *attr,
                     char *buf)
{
      int res, s;
      res = hotkey_get_wlsw(&s);
      if (res < 0)
            return res;

      return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
}

static struct device_attribute dev_attr_hotkey_radio_sw =
      __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);

/* sysfs hotkey report_mode -------------------------------------------- */
static ssize_t hotkey_report_mode_show(struct device *dev,
                     struct device_attribute *attr,
                     char *buf)
{
      return snprintf(buf, PAGE_SIZE, "%d\n",
            (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
}

static struct device_attribute dev_attr_hotkey_report_mode =
      __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);

/* --------------------------------------------------------------------- */

static struct attribute *hotkey_attributes[] __initdata = {
      &dev_attr_hotkey_enable.attr,
      &dev_attr_hotkey_report_mode.attr,
};

static struct attribute *hotkey_mask_attributes[] __initdata = {
      &dev_attr_hotkey_mask.attr,
      &dev_attr_hotkey_bios_enabled.attr,
      &dev_attr_hotkey_bios_mask.attr,
      &dev_attr_hotkey_all_mask.attr,
      &dev_attr_hotkey_recommended_mask.attr,
};

static int __init hotkey_init(struct ibm_init_struct *iibm)
{

      static u16 ibm_keycode_map[] __initdata = {
            /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
            KEY_FN_F1,  KEY_FN_F2,  KEY_COFFEE, KEY_SLEEP,
            KEY_WLAN,   KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
            KEY_FN_F9,  KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
            /* Scan codes 0x0C to 0x0F: Other ACPI HKEY hot keys */
            KEY_UNKNOWN,      /* 0x0C: FN+BACKSPACE */
            KEY_UNKNOWN,      /* 0x0D: FN+INSERT */
            KEY_UNKNOWN,      /* 0x0E: FN+DELETE */
            KEY_RESERVED,     /* 0x0F: FN+HOME (brightness up) */
            /* Scan codes 0x10 to 0x1F: Extended ACPI HKEY hot keys */
            KEY_RESERVED,     /* 0x10: FN+END (brightness down) */
            KEY_RESERVED,     /* 0x11: FN+PGUP (thinklight toggle) */
            KEY_UNKNOWN,      /* 0x12: FN+PGDOWN */
            KEY_ZOOM,   /* 0x13: FN+SPACE (zoom) */
            KEY_RESERVED,     /* 0x14: VOLUME UP */
            KEY_RESERVED,     /* 0x15: VOLUME DOWN */
            KEY_RESERVED,     /* 0x16: MUTE */
            KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
            /* (assignments unknown, please report if found) */
            KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
            KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
      };
      static u16 lenovo_keycode_map[] __initdata = {
            /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
            KEY_FN_F1,  KEY_COFFEE, KEY_BATTERY,      KEY_SLEEP,
            KEY_WLAN,   KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
            KEY_FN_F9,  KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND,
            /* Scan codes 0x0C to 0x0F: Other ACPI HKEY hot keys */
            KEY_UNKNOWN,      /* 0x0C: FN+BACKSPACE */
            KEY_UNKNOWN,      /* 0x0D: FN+INSERT */
            KEY_UNKNOWN,      /* 0x0E: FN+DELETE */
            KEY_RESERVED,     /* 0x0F: FN+HOME (brightness up) */
            /* Scan codes 0x10 to 0x1F: Extended ACPI HKEY hot keys */
            KEY_RESERVED,     /* 0x10: FN+END (brightness down) */
            KEY_RESERVED,     /* 0x11: FN+PGUP (thinklight toggle) */
            KEY_UNKNOWN,      /* 0x12: FN+PGDOWN */
            KEY_ZOOM,   /* 0x13: FN+SPACE (zoom) */
            KEY_RESERVED,     /* 0x14: VOLUME UP */
            KEY_RESERVED,     /* 0x15: VOLUME DOWN */
            KEY_RESERVED,     /* 0x16: MUTE */
            KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */
            /* (assignments unknown, please report if found) */
            KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
            KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
      };

#define TPACPI_HOTKEY_MAP_LEN       ARRAY_SIZE(ibm_keycode_map)
#define TPACPI_HOTKEY_MAP_SIZE            sizeof(ibm_keycode_map)
#define TPACPI_HOTKEY_MAP_TYPESIZE  sizeof(ibm_keycode_map[0])

      int res, i;
      int status;
      int hkeyv;

      vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");

      BUG_ON(!tpacpi_inputdev);

      IBM_ACPIHANDLE_INIT(hkey);
      mutex_init(&hotkey_mutex);

      /* hotkey not supported on 570 */
      tp_features.hotkey = hkey_handle != NULL;

      vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
            str_supported(tp_features.hotkey));

      if (tp_features.hotkey) {
            hotkey_dev_attributes = create_attr_set(8, NULL);
            if (!hotkey_dev_attributes)
                  return -ENOMEM;
            res = add_many_to_attr_set(hotkey_dev_attributes,
                        hotkey_attributes,
                        ARRAY_SIZE(hotkey_attributes));
            if (res)
                  return res;

            /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
               A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
               for HKEY interface version 0x100 */
            if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
                  if ((hkeyv >> 8) != 1) {
                        printk(IBM_ERR "unknown version of the "
                               "HKEY interface: 0x%x\n", hkeyv);
                        printk(IBM_ERR "please report this to %s\n",
                               IBM_MAIL);
                  } else {
                        /*
                         * MHKV 0x100 in A31, R40, R40e,
                         * T4x, X31, and later
                         * */
                        tp_features.hotkey_mask = 1;
                  }
            }

            vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
                  str_supported(tp_features.hotkey_mask));

            if (tp_features.hotkey_mask) {
                  if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
                              "MHKA", "qd")) {
                        printk(IBM_ERR
                               "missing MHKA handler, "
                               "please report this to %s\n",
                               IBM_MAIL);
                        hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
                  }
            }

            res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
            if (!res && tp_features.hotkey_mask) {
                  res = add_many_to_attr_set(hotkey_dev_attributes,
                        hotkey_mask_attributes,
                        ARRAY_SIZE(hotkey_mask_attributes));
            }

            /* Not all thinkpads have a hardware radio switch */
            if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
                  tp_features.hotkey_wlsw = 1;
                  printk(IBM_INFO
                        "radio switch found; radios are %s\n",
                        enabled(status, 0));
                  res = add_to_attr_set(hotkey_dev_attributes,
                              &dev_attr_hotkey_radio_sw.attr);
            }

            if (!res)
                  res = register_attr_set_with_sysfs(
                              hotkey_dev_attributes,
                              &tpacpi_pdev->dev.kobj);
            if (res)
                  return res;

            /* Set up key map */

            hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
                                    GFP_KERNEL);
            if (!hotkey_keycode_map) {
                  printk(IBM_ERR "failed to allocate memory for key map\n");
                  return -ENOMEM;
            }

            if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
                  dbg_printk(TPACPI_DBG_INIT,
                           "using Lenovo default hot key map\n");
                  memcpy(hotkey_keycode_map, &lenovo_keycode_map,
                        TPACPI_HOTKEY_MAP_SIZE);
            } else {
                  dbg_printk(TPACPI_DBG_INIT,
                           "using IBM default hot key map\n");
                  memcpy(hotkey_keycode_map, &ibm_keycode_map,
                        TPACPI_HOTKEY_MAP_SIZE);
            }

            set_bit(EV_KEY, tpacpi_inputdev->evbit);
            set_bit(EV_MSC, tpacpi_inputdev->evbit);
            set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
            tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
            tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
            tpacpi_inputdev->keycode = hotkey_keycode_map;
            for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
                  if (hotkey_keycode_map[i] != KEY_RESERVED) {
                        set_bit(hotkey_keycode_map[i],
                              tpacpi_inputdev->keybit);
                  } else {
                        if (i < sizeof(hotkey_reserved_mask)*8)
                              hotkey_reserved_mask |= 1 << i;
                  }
            }

            if (tp_features.hotkey_wlsw) {
                  set_bit(EV_SW, tpacpi_inputdev->evbit);
                  set_bit(SW_RADIO, tpacpi_inputdev->swbit);
            }

            dbg_printk(TPACPI_DBG_INIT,
                        "enabling hot key handling\n");
            res = hotkey_set(1, (hotkey_all_mask & ~hotkey_reserved_mask)
                              | hotkey_orig_mask);
            if (res)
                  return res;

            dbg_printk(TPACPI_DBG_INIT,
                        "legacy hot key reporting over procfs %s\n",
                        (hotkey_report_mode < 2) ?
                              "enabled" : "disabled");
      }

      return (tp_features.hotkey)? 0 : 1;
}

static void hotkey_exit(void)
{
      int res;

      if (tp_features.hotkey) {
            dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
            res = hotkey_set(hotkey_orig_status, hotkey_orig_mask);
            if (res)
                  printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
      }

      if (hotkey_dev_attributes) {
            delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
            hotkey_dev_attributes = NULL;
      }
}

static void tpacpi_input_send_key(unsigned int scancode,
                          unsigned int keycode)
{
      if (keycode != KEY_RESERVED) {
            mutex_lock(&tpacpi_inputdev_send_mutex);

            input_report_key(tpacpi_inputdev, keycode, 1);
            if (keycode == KEY_UNKNOWN)
                  input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
                            scancode);
            input_sync(tpacpi_inputdev);

            input_report_key(tpacpi_inputdev, keycode, 0);
            if (keycode == KEY_UNKNOWN)
                  input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
                            scancode);
            input_sync(tpacpi_inputdev);

            mutex_unlock(&tpacpi_inputdev_send_mutex);
      }
}

static void tpacpi_input_send_radiosw(void)
{
      int wlsw;

      mutex_lock(&tpacpi_inputdev_send_mutex);

      if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
            input_report_switch(tpacpi_inputdev,
                            SW_RADIO, !!wlsw);
            input_sync(tpacpi_inputdev);
      }

      mutex_unlock(&tpacpi_inputdev_send_mutex);
}

static void hotkey_notify(struct ibm_struct *ibm, u32 event)
{
      u32 hkey;
      unsigned int keycode, scancode;
      int send_acpi_ev;
      int ignore_acpi_ev;

      if (event != 0x80) {
            printk(IBM_ERR "unknown HKEY notification event %d\n", event);
            /* forward it to userspace, maybe it knows how to handle it */
            acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
                                    ibm->acpi->device->dev.bus_id,
                                    event, 0);
            return;
      }

      while (1) {
            if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
                  printk(IBM_ERR "failed to retrieve HKEY event\n");
                  return;
            }

            if (hkey == 0) {
                  /* queue empty */
                  return;
            }

            send_acpi_ev = 0;
            ignore_acpi_ev = 0;

            switch (hkey >> 12) {
            case 1:
                  /* 0x1000-0x1FFF: key presses */
                  scancode = hkey & 0xfff;
                  if (scancode > 0 && scancode < 0x21) {
                        scancode--;
                        keycode = hotkey_keycode_map[scancode];
                        tpacpi_input_send_key(scancode, keycode);
                  } else {
                        printk(IBM_ERR
                               "hotkey 0x%04x out of range for keyboard map\n",
                               hkey);
                        send_acpi_ev = 1;
                  }
                  break;
            case 5:
                  /* 0x5000-0x5FFF: LID */
                  /* we don't handle it through this path, just
                   * eat up known LID events */
                  if (hkey != 0x5001 && hkey != 0x5002) {
                        printk(IBM_ERR
                               "unknown LID-related HKEY event: 0x%04x\n",
                               hkey);
                        send_acpi_ev = 1;
                  } else {
                        ignore_acpi_ev = 1;
                  }
                  break;
            case 7:
                  /* 0x7000-0x7FFF: misc */
                  if (tp_features.hotkey_wlsw && hkey == 0x7000) {
                        tpacpi_input_send_radiosw();
                        break;
                  }
                  /* fallthrough to default */
            default:
                  /* case 2: dock-related */
                  /*    0x2305 - T43 waking up due to bay lever eject while aslept */
                  /* case 3: ultra-bay related. maybe bay in dock? */
                  /*    0x3003 - T43 after wake up by bay lever eject (0x2305) */
                  printk(IBM_NOTICE "unhandled HKEY event 0x%04x\n", hkey);
                  send_acpi_ev = 1;
            }

            /* Legacy events */
            if (!ignore_acpi_ev && (send_acpi_ev || hotkey_report_mode < 2)) {
                  acpi_bus_generate_proc_event(ibm->acpi->device, event, hkey);
            }

            /* netlink events */
            if (!ignore_acpi_ev && send_acpi_ev) {
                  acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
                                          ibm->acpi->device->dev.bus_id,
                                          event, hkey);
            }
      }
}

static void hotkey_resume(void)
{
      tpacpi_input_send_radiosw();
}

/*
 * Call with hotkey_mutex held
 */
static int hotkey_get(int *status, u32 *mask)
{
      if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
            return -EIO;

      if (tp_features.hotkey_mask)
            if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
                  return -EIO;

      return 0;
}

/*
 * Call with hotkey_mutex held
 */
static int hotkey_set(int status, u32 mask)
{
      int i;

      if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
            return -EIO;

      if (tp_features.hotkey_mask)
            for (i = 0; i < 32; i++) {
                  int bit = ((1 << i) & mask) != 0;
                  if (!acpi_evalf(hkey_handle,
                              NULL, "MHKM", "vdd", i + 1, bit))
                        return -EIO;
            }

      return 0;
}

/* procfs -------------------------------------------------------------- */
static int hotkey_read(char *p)
{
      int res, status;
      u32 mask;
      int len = 0;

      if (!tp_features.hotkey) {
            len += sprintf(p + len, "status:\t\tnot supported\n");
            return len;
      }

      if (mutex_lock_interruptible(&hotkey_mutex))
            return -ERESTARTSYS;
      res = hotkey_get(&status, &mask);
      mutex_unlock(&hotkey_mutex);
      if (res)
            return res;

      len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
      if (tp_features.hotkey_mask) {
            len += sprintf(p + len, "mask:\t\t0x%08x\n", mask);
            len += sprintf(p + len,
                         "commands:\tenable, disable, reset, <mask>\n");
      } else {
            len += sprintf(p + len, "mask:\t\tnot supported\n");
            len += sprintf(p + len, "commands:\tenable, disable, reset\n");
      }

      return len;
}

static int hotkey_write(char *buf)
{
      int res, status;
      u32 mask;
      char *cmd;
      int do_cmd = 0;

      if (!tp_features.hotkey)
            return -ENODEV;

      if (mutex_lock_interruptible(&hotkey_mutex))
            return -ERESTARTSYS;

      res = hotkey_get(&status, &mask);
      if (res)
            goto errexit;

      res = 0;
      while ((cmd = next_cmd(&buf))) {
            if (strlencmp(cmd, "enable") == 0) {
                  status = 1;
            } else if (strlencmp(cmd, "disable") == 0) {
                  status = 0;
            } else if (strlencmp(cmd, "reset") == 0) {
                  status = hotkey_orig_status;
                  mask = hotkey_orig_mask;
            } else if (sscanf(cmd, "0x%x", &mask) == 1) {
                  /* mask set */
            } else if (sscanf(cmd, "%x", &mask) == 1) {
                  /* mask set */
            } else {
                  res = -EINVAL;
                  goto errexit;
            }
            do_cmd = 1;
      }

      if (do_cmd)
            res = hotkey_set(status, mask);

errexit:
      mutex_unlock(&hotkey_mutex);
      return res;
}

static const struct acpi_device_id ibm_htk_device_ids[] = {
      {IBM_HKEY_HID, 0},
      {"", 0},
};

static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
      .hid = ibm_htk_device_ids,
      .notify = hotkey_notify,
      .handle = &hkey_handle,
      .type = ACPI_DEVICE_NOTIFY,
};

static struct ibm_struct hotkey_driver_data = {
      .name = "hotkey",
      .read = hotkey_read,
      .write = hotkey_write,
      .exit = hotkey_exit,
      .resume = hotkey_resume,
      .acpi = &ibm_hotkey_acpidriver,
};

/*************************************************************************
 * Bluetooth subdriver
 */

/* sysfs bluetooth enable ---------------------------------------------- */
static ssize_t bluetooth_enable_show(struct device *dev,
                     struct device_attribute *attr,
                     char *buf)
{
      int status;

      status = bluetooth_get_radiosw();
      if (status < 0)
            return status;

      return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
}

static ssize_t bluetooth_enable_store(struct device *dev,
                      struct device_attribute *attr,
                      const char *buf, size_t count)
{
      unsigned long t;
      int res;

      if (parse_strtoul(buf, 1, &t))
            return -EINVAL;

      res = bluetooth_set_radiosw(t);

      return (res) ? res : count;
}

static struct device_attribute dev_attr_bluetooth_enable =
      __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
            bluetooth_enable_show, bluetooth_enable_store);

/* --------------------------------------------------------------------- */

static struct attribute *bluetooth_attributes[] = {
      &dev_attr_bluetooth_enable.attr,
      NULL
};

static const struct attribute_group bluetooth_attr_group = {
      .attrs = bluetooth_attributes,
};

static int __init bluetooth_init(struct ibm_init_struct *iibm)
{
      int res;
      int status = 0;

      vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");

      IBM_ACPIHANDLE_INIT(hkey);

      /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
         G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
      tp_features.bluetooth = hkey_handle &&
          acpi_evalf(hkey_handle, &status, "GBDC", "qd");

      vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
            str_supported(tp_features.bluetooth),
            status);

      if (tp_features.bluetooth) {
            if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
                  /* no bluetooth hardware present in system */
                  tp_features.bluetooth = 0;
                  dbg_printk(TPACPI_DBG_INIT,
                           "bluetooth hardware not installed\n");
            } else {
                  res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
                              &bluetooth_attr_group);
                  if (res)
                        return res;
            }
      }

      return (tp_features.bluetooth)? 0 : 1;
}

static void bluetooth_exit(void)
{
      sysfs_remove_group(&tpacpi_pdev->dev.kobj,
                  &bluetooth_attr_group);
}

static int bluetooth_get_radiosw(void)
{
      int status;

      if (!tp_features.bluetooth)
            return -ENODEV;

      if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
            return -EIO;

      return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
}

static int bluetooth_set_radiosw(int radio_on)
{
      int status;

      if (!tp_features.bluetooth)
            return -ENODEV;

      if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
            return -EIO;
      if (radio_on)
            status |= TP_ACPI_BLUETOOTH_RADIOSSW;
      else
            status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
      if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
            return -EIO;

      return 0;
}

/* procfs -------------------------------------------------------------- */
static int bluetooth_read(char *p)
{
      int len = 0;
      int status = bluetooth_get_radiosw();

      if (!tp_features.bluetooth)
            len += sprintf(p + len, "status:\t\tnot supported\n");
      else {
            len += sprintf(p + len, "status:\t\t%s\n",
                        (status)? "enabled" : "disabled");
            len += sprintf(p + len, "commands:\tenable, disable\n");
      }

      return len;
}

static int bluetooth_write(char *buf)
{
      char *cmd;

      if (!tp_features.bluetooth)
            return -ENODEV;

      while ((cmd = next_cmd(&buf))) {
            if (strlencmp(cmd, "enable") == 0) {
                  bluetooth_set_radiosw(1);
            } else if (strlencmp(cmd, "disable") == 0) {
                  bluetooth_set_radiosw(0);
            } else
                  return -EINVAL;
      }

      return 0;
}

static struct ibm_struct bluetooth_driver_data = {
      .name = "bluetooth",
      .read = bluetooth_read,
      .write = bluetooth_write,
      .exit = bluetooth_exit,
};

/*************************************************************************
 * Wan subdriver
 */

/* sysfs wan enable ---------------------------------------------------- */
static ssize_t wan_enable_show(struct device *dev,
                     struct device_attribute *attr,
                     char *buf)
{
      int status;

      status = wan_get_radiosw();
      if (status < 0)
            return status;

      return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
}

static ssize_t wan_enable_store(struct device *dev,
                      struct device_attribute *attr,
                      const char *buf, size_t count)
{
      unsigned long t;
      int res;

      if (parse_strtoul(buf, 1, &t))
            return -EINVAL;

      res = wan_set_radiosw(t);

      return (res) ? res : count;
}

static struct device_attribute dev_attr_wan_enable =
      __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
            wan_enable_show, wan_enable_store);

/* --------------------------------------------------------------------- */

static struct attribute *wan_attributes[] = {
      &dev_attr_wan_enable.attr,
      NULL
};

static const struct attribute_group wan_attr_group = {
      .attrs = wan_attributes,
};

static int __init wan_init(struct ibm_init_struct *iibm)
{
      int res;
      int status = 0;

      vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");

      IBM_ACPIHANDLE_INIT(hkey);

      tp_features.wan = hkey_handle &&
          acpi_evalf(hkey_handle, &status, "GWAN", "qd");

      vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
            str_supported(tp_features.wan),
            status);

      if (tp_features.wan) {
            if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
                  /* no wan hardware present in system */
                  tp_features.wan = 0;
                  dbg_printk(TPACPI_DBG_INIT,
                           "wan hardware not installed\n");
            } else {
                  res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
                              &wan_attr_group);
                  if (res)
                        return res;
            }
      }

      return (tp_features.wan)? 0 : 1;
}

static void wan_exit(void)
{
      sysfs_remove_group(&tpacpi_pdev->dev.kobj,
            &wan_attr_group);
}

static int wan_get_radiosw(void)
{
      int status;

      if (!tp_features.wan)
            return -ENODEV;

      if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
            return -EIO;

      return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
}

static int wan_set_radiosw(int radio_on)
{
      int status;

      if (!tp_features.wan)
            return -ENODEV;

      if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
            return -EIO;
      if (radio_on)
            status |= TP_ACPI_WANCARD_RADIOSSW;
      else
            status &= ~TP_ACPI_WANCARD_RADIOSSW;
      if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
            return -EIO;

      return 0;
}

/* procfs -------------------------------------------------------------- */
static int wan_read(char *p)
{
      int len = 0;
      int status = wan_get_radiosw();

      if (!tp_features.wan)
            len += sprintf(p + len, "status:\t\tnot supported\n");
      else {
            len += sprintf(p + len, "status:\t\t%s\n",
                        (status)? "enabled" : "disabled");
            len += sprintf(p + len, "commands:\tenable, disable\n");
      }

      return len;
}

static int wan_write(char *buf)
{
      char *cmd;

      if (!tp_features.wan)
            return -ENODEV;

      while ((cmd = next_cmd(&buf))) {
            if (strlencmp(cmd, "enable") == 0) {
                  wan_set_radiosw(1);
            } else if (strlencmp(cmd, "disable") == 0) {
                  wan_set_radiosw(0);
            } else
                  return -EINVAL;
      }

      return 0;
}

static struct ibm_struct wan_driver_data = {
      .name = "wan",
      .read = wan_read,
      .write = wan_write,
      .exit = wan_exit,
      .flags.experimental = 1,
};

/*************************************************************************
 * Video subdriver
 */

static enum video_access_mode video_supported;
static int video_orig_autosw;

IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",      /* 570 */
         "\\_SB.PCI0.AGP0.VID0",    /* 600e/x, 770x */
         "\\_SB.PCI0.VID0",   /* 770e */
         "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
         "\\_SB.PCI0.AGP.VID",      /* all others */
         );                   /* R30, R31 */

IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");  /* G41 */

static int __init video_init(struct ibm_init_struct *iibm)
{
      int ivga;

      vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");

      IBM_ACPIHANDLE_INIT(vid);
      IBM_ACPIHANDLE_INIT(vid2);

      if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
            /* G41, assume IVGA doesn't change */
            vid_handle = vid2_handle;

      if (!vid_handle)
            /* video switching not supported on R30, R31 */
            video_supported = TPACPI_VIDEO_NONE;
      else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
            /* 570 */
            video_supported = TPACPI_VIDEO_570;
      else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
            /* 600e/x, 770e, 770x */
            video_supported = TPACPI_VIDEO_770;
      else
            /* all others */
            video_supported = TPACPI_VIDEO_NEW;

      vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
            str_supported(video_supported != TPACPI_VIDEO_NONE),
            video_supported);

      return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
}

static void video_exit(void)
{
      dbg_printk(TPACPI_DBG_EXIT,
               "restoring original video autoswitch mode\n");
      if (video_autosw_set(video_orig_autosw))
            printk(IBM_ERR "error while trying to restore original "
                  "video autoswitch mode\n");
}

static int video_outputsw_get(void)
{
      int status = 0;
      int i;

      switch (video_supported) {
      case TPACPI_VIDEO_570:
            if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
                         TP_ACPI_VIDEO_570_PHSCMD))
                  return -EIO;
            status = i & TP_ACPI_VIDEO_570_PHSMASK;
            break;
      case TPACPI_VIDEO_770:
            if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
                  return -EIO;
            if (i)
                  status |= TP_ACPI_VIDEO_S_LCD;
            if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
                  return -EIO;
            if (i)
                  status |= TP_ACPI_VIDEO_S_CRT;
            break;
      case TPACPI_VIDEO_NEW:
            if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
                !acpi_evalf(NULL, &i, "\\VCDC", "d"))
                  return -EIO;
            if (i)
                  status |= TP_ACPI_VIDEO_S_CRT;

            if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
                !acpi_evalf(NULL, &i, "\\VCDL", "d"))
                  return -EIO;
            if (i)
                  status |= TP_ACPI_VIDEO_S_LCD;
            if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
                  return -EIO;
            if (i)
                  status |= TP_ACPI_VIDEO_S_DVI;
            break;
      default:
            return -ENOSYS;
      }

      return status;
}

static int video_outputsw_set(int status)
{
      int autosw;
      int res = 0;

      switch (video_supported) {
      case TPACPI_VIDEO_570:
            res = acpi_evalf(NULL, NULL,
                         "\\_SB.PHS2", "vdd",
                         TP_ACPI_VIDEO_570_PHS2CMD,
                         status | TP_ACPI_VIDEO_570_PHS2SET);
            break;
      case TPACPI_VIDEO_770:
            autosw = video_autosw_get();
            if (autosw < 0)
                  return autosw;

            res = video_autosw_set(1);
            if (res)
                  return res;
            res = acpi_evalf(vid_handle, NULL,
                         "ASWT", "vdd", status * 0x100, 0);
            if (!autosw && video_autosw_set(autosw)) {
                  printk(IBM_ERR "video auto-switch left enabled due to error\n");
                  return -EIO;
            }
            break;
      case TPACPI_VIDEO_NEW:
            res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
                  acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
            break;
      default:
            return -ENOSYS;
      }

      return (res)? 0 : -EIO;
}

static int video_autosw_get(void)
{
      int autosw = 0;

      switch (video_supported) {
      case TPACPI_VIDEO_570:
            if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
                  return -EIO;
            break;
      case TPACPI_VIDEO_770:
      case TPACPI_VIDEO_NEW:
            if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
                  return -EIO;
            break;
      default:
            return -ENOSYS;
      }

      return autosw & 1;
}

static int video_autosw_set(int enable)
{
      if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
            return -EIO;
      return 0;
}

static int video_outputsw_cycle(void)
{
      int autosw = video_autosw_get();
      int res;

      if (autosw < 0)
            return autosw;

      switch (video_supported) {
      case TPACPI_VIDEO_570:
            res = video_autosw_set(1);
            if (res)
                  return res;
            res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
            break;
      case TPACPI_VIDEO_770:
      case TPACPI_VIDEO_NEW:
            res = video_autosw_set(1);
            if (res)
                  return res;
            res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
            break;
      default:
            return -ENOSYS;
      }
      if (!autosw && video_autosw_set(autosw)) {
            printk(IBM_ERR "video auto-switch left enabled due to error\n");
            return -EIO;
      }

      return (res)? 0 : -EIO;
}

static int video_expand_toggle(void)
{
      switch (video_supported) {
      case TPACPI_VIDEO_570:
            return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
                  0 : -EIO;
      case TPACPI_VIDEO_770:
            return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
                  0 : -EIO;
      case TPACPI_VIDEO_NEW:
            return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
                  0 : -EIO;
      default:
            return -ENOSYS;
      }
      /* not reached */
}

static int video_read(char *p)
{
      int status, autosw;
      int len = 0;

      if (video_supported == TPACPI_VIDEO_NONE) {
            len += sprintf(p + len, "status:\t\tnot supported\n");
            return len;
      }

      status = video_outputsw_get();
      if (status < 0)
            return status;

      autosw = video_autosw_get();
      if (autosw < 0)
            return autosw;

      len += sprintf(p + len, "status:\t\tsupported\n");
      len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
      len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
      if (video_supported == TPACPI_VIDEO_NEW)
            len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
      len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
      len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
      len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
      if (video_supported == TPACPI_VIDEO_NEW)
            len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
      len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
      len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");

      return len;
}

static int video_write(char *buf)
{
      char *cmd;
      int enable, disable, status;
      int res;

      if (video_supported == TPACPI_VIDEO_NONE)
            return -ENODEV;

      enable = 0;
      disable = 0;

      while ((cmd = next_cmd(&buf))) {
            if (strlencmp(cmd, "lcd_enable") == 0) {
                  enable |= TP_ACPI_VIDEO_S_LCD;
            } else if (strlencmp(cmd, "lcd_disable") == 0) {
                  disable |= TP_ACPI_VIDEO_S_LCD;
            } else if (strlencmp(cmd, "crt_enable") == 0) {
                  enable |= TP_ACPI_VIDEO_S_CRT;
            } else if (strlencmp(cmd, "crt_disable") == 0) {
                  disable |= TP_ACPI_VIDEO_S_CRT;
            } else if (video_supported == TPACPI_VIDEO_NEW &&
                     strlencmp(cmd, "dvi_enable") == 0) {
                  enable |= TP_ACPI_VIDEO_S_DVI;
            } else if (video_supported == TPACPI_VIDEO_NEW &&
                     strlencmp(cmd, "dvi_disable") == 0) {
                  disable |= TP_ACPI_VIDEO_S_DVI;
            } else if (strlencmp(cmd, "auto_enable") == 0) {
                  res = video_autosw_set(1);
                  if (res)
                        return res;
            } else if (strlencmp(cmd, "auto_disable") == 0) {
                  res = video_autosw_set(0);
                  if (res)
                        return res;
            } else if (strlencmp(cmd, "video_switch") == 0) {
                  res = video_outputsw_cycle();
                  if (res)
                        return res;
            } else if (strlencmp(cmd, "expand_toggle") == 0) {
                  res = video_expand_toggle();
                  if (res)
                        return res;
            } else
                  return -EINVAL;
      }

      if (enable || disable) {
            status = video_outputsw_get();
            if (status < 0)
                  return status;
            res = video_outputsw_set((status & ~disable) | enable);
            if (res)
                  return res;
      }

      return 0;
}

static struct ibm_struct video_driver_data = {
      .name = "video",
      .read = video_read,
      .write = video_write,
      .exit = video_exit,
};

/*************************************************************************
 * Light (thinklight) subdriver
 */

IBM_HANDLE(lght, root, "\\LGHT");   /* A21e, A2xm/p, T20-22, X20-21 */
IBM_HANDLE(ledb, ec, "LEDB");       /* G4x */

static int __init light_init(struct ibm_init_struct *iibm)
{
      vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");

      IBM_ACPIHANDLE_INIT(ledb);
      IBM_ACPIHANDLE_INIT(lght);
      IBM_ACPIHANDLE_INIT(cmos);

      /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
      tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;

      if (tp_features.light)
            /* light status not supported on
               570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
            tp_features.light_status =
                  acpi_evalf(ec_handle, NULL, "KBLT", "qv");

      vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
            str_supported(tp_features.light));

      return (tp_features.light)? 0 : 1;
}

static int light_read(char *p)
{
      int len = 0;
      int status = 0;

      if (!tp_features.light) {
            len += sprintf(p + len, "status:\t\tnot supported\n");
      } else if (!tp_features.light_status) {
            len += sprintf(p + len, "status:\t\tunknown\n");
            len += sprintf(p + len, "commands:\ton, off\n");
      } else {
            if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
                  return -EIO;
            len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
            len += sprintf(p + len, "commands:\ton, off\n");
      }

      return len;
}

static int light_write(char *buf)
{
      int cmos_cmd, lght_cmd;
      char *cmd;
      int success;

      if (!tp_features.light)
            return -ENODEV;

      while ((cmd = next_cmd(&buf))) {
            if (strlencmp(cmd, "on") == 0) {
                  cmos_cmd = 0x0c;
                  lght_cmd = 1;
            } else if (strlencmp(cmd, "off") == 0) {
                  cmos_cmd = 0x0d;
                  lght_cmd = 0;
            } else
                  return -EINVAL;

            success = cmos_handle ?
                acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
                acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
            if (!success)
                  return -EIO;
      }

      return 0;
}

static struct ibm_struct light_driver_data = {
      .name = "light",
      .read = light_read,
      .write = light_write,
};

/*************************************************************************
 * Dock subdriver
 */

#ifdef CONFIG_THINKPAD_ACPI_DOCK

IBM_HANDLE(dock, root, "\\_SB.GDCK",      /* X30, X31, X40 */
         "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
         "\\_SB.PCI0.PCI1.DOCK",    /* all others */
         "\\_SB.PCI.ISA.SLCE",      /* 570 */
    );                        /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */

/* don't list other alternatives as we install a notify handler on the 570 */
IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */

static const struct acpi_device_id ibm_pci_device_ids[] = {
      {PCI_ROOT_HID_STRING, 0},
      {"", 0},
};

static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
      {
       .notify = dock_notify,
       .handle = &dock_handle,
       .type = ACPI_SYSTEM_NOTIFY,
      },
      {
      /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
       * We just use it to get notifications of dock hotplug
       * in very old thinkpads */
       .hid = ibm_pci_device_ids,
       .notify = dock_notify,
       .handle = &pci_handle,
       .type = ACPI_SYSTEM_NOTIFY,
      },
};

static struct ibm_struct dock_driver_data[2] = {
      {
       .name = "dock",
       .read = dock_read,
       .write = dock_write,
       .acpi = &ibm_dock_acpidriver[0],
      },
      {
       .name = "dock",
       .acpi = &ibm_dock_acpidriver[1],
      },
};

#define dock_docked() (_sta(dock_handle) & 1)

static int __init dock_init(struct ibm_init_struct *iibm)
{
      vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");

      IBM_ACPIHANDLE_INIT(dock);

      vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
            str_supported(dock_handle != NULL));

      return (dock_handle)? 0 : 1;
}

static int __init dock_init2(struct ibm_init_struct *iibm)
{
      int dock2_needed;

      vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");

      if (dock_driver_data[0].flags.acpi_driver_registered &&
          dock_driver_data[0].flags.acpi_notify_installed) {
            IBM_ACPIHANDLE_INIT(pci);
            dock2_needed = (pci_handle != NULL);
            vdbg_printk(TPACPI_DBG_INIT,
                      "dock PCI handler for the TP 570 is %s\n",
                      str_supported(dock2_needed));
      } else {
            vdbg_printk(TPACPI_DBG_INIT,
            "dock subdriver part 2 not required\n");
            dock2_needed = 0;
      }

      return (dock2_needed)? 0 : 1;
}

static void dock_notify(struct ibm_struct *ibm, u32 event)
{
      int docked = dock_docked();
      int pci = ibm->acpi->hid && ibm->acpi->device &&
            acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
      int data;

      if (event == 1 && !pci) /* 570 */
            data = 1;   /* button */
      else if (event == 1 && pci)   /* 570 */
            data = 3;   /* dock */
      else if (event == 3 && docked)
            data = 1;   /* button */
      else if (event == 3 && !docked)
            data = 2;   /* undock */
      else if (event == 0 && docked)
            data = 3;   /* dock */
      else {
            printk(IBM_ERR "unknown dock event %d, status %d\n",
                   event, _sta(dock_handle));
            data = 0;   /* unknown */
      }
      acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
      acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
                                ibm->acpi->device->dev.bus_id,
                                event, data);
}

static int dock_read(char *p)
{
      int len = 0;
      int docked = dock_docked();

      if (!dock_handle)
            len += sprintf(p + len, "status:\t\tnot supported\n");
      else if (!docked)
            len += sprintf(p + len, "status:\t\tundocked\n");
      else {
            len += sprintf(p + len, "status:\t\tdocked\n");
            len += sprintf(p + len, "commands:\tdock, undock\n");
      }

      return len;
}

static int dock_write(char *buf)
{
      char *cmd;

      if (!dock_docked())
            return -ENODEV;

      while ((cmd = next_cmd(&buf))) {
            if (strlencmp(cmd, "undock") == 0) {
                  if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
                      !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
                        return -EIO;
            } else if (strlencmp(cmd, "dock") == 0) {
                  if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
                        return -EIO;
            } else
                  return -EINVAL;
      }

      return 0;
}

#endif /* CONFIG_THINKPAD_ACPI_DOCK */

/*************************************************************************
 * Bay subdriver
 */

#ifdef CONFIG_THINKPAD_ACPI_BAY
IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",      /* 570 */
         "\\_SB.PCI0.IDE0.IDES.IDSM",     /* 600e/x, 770e, 770x */
         "\\_SB.PCI0.SATA.SCND.MSTR",     /* T60, X60, Z60 */
         "\\_SB.PCI0.IDE0.SCND.MSTR",     /* all others */
         );                   /* A21e, R30, R31 */
IBM_HANDLE(bay_ej, bay, "_EJ3",     /* 600e/x, A2xm/p, A3x */
         "_EJ0",        /* all others */
         );             /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",   /* A3x, R32 */
         "\\_SB.PCI0.IDE0.IDEP.IDPS",     /* 600e/x, 770e, 770x */
         );                   /* all others */
IBM_HANDLE(bay2_ej, bay2, "_EJ3",   /* 600e/x, 770e, A3x */
         "_EJ0",              /* 770x */
         );                   /* all others */

static int __init bay_init(struct ibm_init_struct *iibm)
{
      vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");

      IBM_ACPIHANDLE_INIT(bay);
      if (bay_handle)
            IBM_ACPIHANDLE_INIT(bay_ej);
      IBM_ACPIHANDLE_INIT(bay2);
      if (bay2_handle)
            IBM_ACPIHANDLE_INIT(bay2_ej);

      tp_features.bay_status = bay_handle &&
            acpi_evalf(bay_handle, NULL, "_STA", "qv");
      tp_features.bay_status2 = bay2_handle &&
            acpi_evalf(bay2_handle, NULL, "_STA", "qv");

      tp_features.bay_eject = bay_handle && bay_ej_handle &&
            (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
      tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
            (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);

      vdbg_printk(TPACPI_DBG_INIT,
            "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
            str_supported(tp_features.bay_status),
            str_supported(tp_features.bay_eject),
            str_supported(tp_features.bay_status2),
            str_supported(tp_features.bay_eject2));

      return (tp_features.bay_status || tp_features.bay_eject ||
            tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
}

static void bay_notify(struct ibm_struct *ibm, u32 event)
{
      acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
      acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
                                ibm->acpi->device->dev.bus_id,
                                event, 0);
}

#define bay_occupied(b) (_sta(b##_handle) & 1)

static int bay_read(char *p)
{
      int len = 0;
      int occupied = bay_occupied(bay);
      int occupied2 = bay_occupied(bay2);
      int eject, eject2;

      len += sprintf(p + len, "status:\t\t%s\n",
            tp_features.bay_status ?
                  (occupied ? "occupied" : "unoccupied") :
                        "not supported");
      if (tp_features.bay_status2)
            len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
                         "occupied" : "unoccupied");

      eject = tp_features.bay_eject && occupied;
      eject2 = tp_features.bay_eject2 && occupied2;

      if (eject && eject2)
            len += sprintf(p + len, "commands:\teject, eject2\n");
      else if (eject)
            len += sprintf(p + len, "commands:\teject\n");
      else if (eject2)
            len += sprintf(p + len, "commands:\teject2\n");

      return len;
}

static int bay_write(char *buf)
{
      char *cmd;

      if (!tp_features.bay_eject && !tp_features.bay_eject2)
            return -ENODEV;

      while ((cmd = next_cmd(&buf))) {
            if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
                  if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
                        return -EIO;
            } else if (tp_features.bay_eject2 &&
                     strlencmp(cmd, "eject2") == 0) {
                  if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
                        return -EIO;
            } else
                  return -EINVAL;
      }

      return 0;
}

static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
      .notify = bay_notify,
      .handle = &bay_handle,
      .type = ACPI_SYSTEM_NOTIFY,
};

static struct ibm_struct bay_driver_data = {
      .name = "bay",
      .read = bay_read,
      .write = bay_write,
      .acpi = &ibm_bay_acpidriver,
};

#endif /* CONFIG_THINKPAD_ACPI_BAY */

/*************************************************************************
 * CMOS subdriver
 */

/* sysfs cmos_command -------------------------------------------------- */
static ssize_t cmos_command_store(struct device *dev,
                      struct device_attribute *attr,
                      const char *buf, size_t count)
{
      unsigned long cmos_cmd;
      int res;

      if (parse_strtoul(buf, 21, &cmos_cmd))
            return -EINVAL;

      res = issue_thinkpad_cmos_command(cmos_cmd);
      return (res)? res : count;
}

static struct device_attribute dev_attr_cmos_command =
      __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);

/* --------------------------------------------------------------------- */

static int __init cmos_init(struct ibm_init_struct *iibm)
{
      int res;

      vdbg_printk(TPACPI_DBG_INIT,
            "initializing cmos commands subdriver\n");

      IBM_ACPIHANDLE_INIT(cmos);

      vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
            str_supported(cmos_handle != NULL));

      res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
      if (res)
            return res;

      return (cmos_handle)? 0 : 1;
}

static void cmos_exit(void)
{
      device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
}

static int cmos_read(char *p)
{
      int len = 0;

      /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
         R30, R31, T20-22, X20-21 */
      if (!cmos_handle)
            len += sprintf(p + len, "status:\t\tnot supported\n");
      else {
            len += sprintf(p + len, "status:\t\tsupported\n");
            len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
      }

      return len;
}

static int cmos_write(char *buf)
{
      char *cmd;
      int cmos_cmd, res;

      while ((cmd = next_cmd(&buf))) {
            if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
                cmos_cmd >= 0 && cmos_cmd <= 21) {
                  /* cmos_cmd set */
            } else
                  return -EINVAL;

            res = issue_thinkpad_cmos_command(cmos_cmd);
            if (res)
                  return res;
      }

      return 0;
}

static struct ibm_struct cmos_driver_data = {
      .name = "cmos",
      .read = cmos_read,
      .write = cmos_write,
      .exit = cmos_exit,
};

/*************************************************************************
 * LED subdriver
 */

static enum led_access_mode led_supported;

IBM_HANDLE(led, ec, "SLED",   /* 570 */
         "SYSL",        /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
         "LED",         /* all others */
         );             /* R30, R31 */

static int __init led_init(struct ibm_init_struct *iibm)
{
      vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");

      IBM_ACPIHANDLE_INIT(led);

      if (!led_handle)
            /* led not supported on R30, R31 */
            led_supported = TPACPI_LED_NONE;
      else if (strlencmp(led_path, "SLED") == 0)
            /* 570 */
            led_supported = TPACPI_LED_570;
      else if (strlencmp(led_path, "SYSL") == 0)
            /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
            led_supported = TPACPI_LED_OLD;
      else
            /* all others */
            led_supported = TPACPI_LED_NEW;

      vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
            str_supported(led_supported), led_supported);

      return (led_supported != TPACPI_LED_NONE)? 0 : 1;
}

#define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))

static int led_read(char *p)
{
      int len = 0;

      if (!led_supported) {
            len += sprintf(p + len, "status:\t\tnot supported\n");
            return len;
      }
      len += sprintf(p + len, "status:\t\tsupported\n");

      if (led_supported == TPACPI_LED_570) {
            /* 570 */
            int i, status;
            for (i = 0; i < 8; i++) {
                  if (!acpi_evalf(ec_handle,
                              &status, "GLED", "dd", 1 << i))
                        return -EIO;
                  len += sprintf(p + len, "%d:\t\t%s\n",
                               i, led_status(status));
            }
      }

      len += sprintf(p + len, "commands:\t"
                   "<led> on, <led> off, <led> blink (<led> is 0-7)\n");

      return len;
}

/* off, on, blink */
static const int led_sled_arg1[] = { 0, 1, 3 };
static const int led_exp_hlbl[] = { 0, 0, 1 };  /* led# * */
static const int led_exp_hlcl[] = { 0, 1, 1 };  /* led# * */
static const int led_led_arg1[] = { 0, 0x80, 0xc0 };

static int led_write(char *buf)
{
      char *cmd;
      int led, ind, ret;

      if (!led_supported)
            return -ENODEV;

      while ((cmd = next_cmd(&buf))) {
            if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
                  return -EINVAL;

            if (strstr(cmd, "off")) {
                  ind = 0;
            } else if (strstr(cmd, "on")) {
                  ind = 1;
            } else if (strstr(cmd, "blink")) {
                  ind = 2;
            } else
                  return -EINVAL;

            if (led_supported == TPACPI_LED_570) {
                  /* 570 */
                  led = 1 << led;
                  if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
                              led, led_sled_arg1[ind]))
                        return -EIO;
            } else if (led_supported == TPACPI_LED_OLD) {
                  /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
                  led = 1 << led;
                  ret = ec_write(TPACPI_LED_EC_HLMS, led);
                  if (ret >= 0)
                        ret =
                            ec_write(TPACPI_LED_EC_HLBL,
                                   led * led_exp_hlbl[ind]);
                  if (ret >= 0)
                        ret =
                            ec_write(TPACPI_LED_EC_HLCL,
                                   led * led_exp_hlcl[ind]);
                  if (ret < 0)
                        return ret;
            } else {
                  /* all others */
                  if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
                              led, led_led_arg1[ind]))
                        return -EIO;
            }
      }

      return 0;
}

static struct ibm_struct led_driver_data = {
      .name = "led",
      .read = led_read,
      .write = led_write,
};

/*************************************************************************
 * Beep subdriver
 */

IBM_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */

static int __init beep_init(struct ibm_init_struct *iibm)
{
      vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");

      IBM_ACPIHANDLE_INIT(beep);

      vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
            str_supported(beep_handle != NULL));

      return (beep_handle)? 0 : 1;
}

static int beep_read(char *p)
{
      int len = 0;

      if (!beep_handle)
            len += sprintf(p + len, "status:\t\tnot supported\n");
      else {
            len += sprintf(p + len, "status:\t\tsupported\n");
            len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
      }

      return len;
}

static int beep_write(char *buf)
{
      char *cmd;
      int beep_cmd;

      if (!beep_handle)
            return -ENODEV;

      while ((cmd = next_cmd(&buf))) {
            if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
                beep_cmd >= 0 && beep_cmd <= 17) {
                  /* beep_cmd set */
            } else
                  return -EINVAL;
            if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
                  return -EIO;
      }

      return 0;
}

static struct ibm_struct beep_driver_data = {
      .name = "beep",
      .read = beep_read,
      .write = beep_write,
};

/*************************************************************************
 * Thermal subdriver
 */

static enum thermal_access_mode thermal_read_mode;

/* sysfs temp##_input -------------------------------------------------- */

static ssize_t thermal_temp_input_show(struct device *dev,
                     struct device_attribute *attr,
                     char *buf)
{
      struct sensor_device_attribute *sensor_attr =
                              to_sensor_dev_attr(attr);
      int idx = sensor_attr->index;
      s32 value;
      int res;

      res = thermal_get_sensor(idx, &value);
      if (res)
            return res;
      if (value == TP_EC_THERMAL_TMP_NA * 1000)
            return -ENXIO;

      return snprintf(buf, PAGE_SIZE, "%d\n", value);
}

#define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
       SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, thermal_temp_input_show, NULL, _idxB)

static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
      THERMAL_SENSOR_ATTR_TEMP(1, 0),
      THERMAL_SENSOR_ATTR_TEMP(2, 1),
      THERMAL_SENSOR_ATTR_TEMP(3, 2),
      THERMAL_SENSOR_ATTR_TEMP(4, 3),
      THERMAL_SENSOR_ATTR_TEMP(5, 4),
      THERMAL_SENSOR_ATTR_TEMP(6, 5),
      THERMAL_SENSOR_ATTR_TEMP(7, 6),
      THERMAL_SENSOR_ATTR_TEMP(8, 7),
      THERMAL_SENSOR_ATTR_TEMP(9, 8),
      THERMAL_SENSOR_ATTR_TEMP(10, 9),
      THERMAL_SENSOR_ATTR_TEMP(11, 10),
      THERMAL_SENSOR_ATTR_TEMP(12, 11),
      THERMAL_SENSOR_ATTR_TEMP(13, 12),
      THERMAL_SENSOR_ATTR_TEMP(14, 13),
      THERMAL_SENSOR_ATTR_TEMP(15, 14),
      THERMAL_SENSOR_ATTR_TEMP(16, 15),
};

#define THERMAL_ATTRS(X) \
      &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr

static struct attribute *thermal_temp_input_attr[] = {
      THERMAL_ATTRS(8),
      THERMAL_ATTRS(9),
      THERMAL_ATTRS(10),
      THERMAL_ATTRS(11),
      THERMAL_ATTRS(12),
      THERMAL_ATTRS(13),
      THERMAL_ATTRS(14),
      THERMAL_ATTRS(15),
      THERMAL_ATTRS(0),
      THERMAL_ATTRS(1),
      THERMAL_ATTRS(2),
      THERMAL_ATTRS(3),
      THERMAL_ATTRS(4),
      THERMAL_ATTRS(5),
      THERMAL_ATTRS(6),
      THERMAL_ATTRS(7),
      NULL
};

static const struct attribute_group thermal_temp_input16_group = {
      .attrs = thermal_temp_input_attr
};

static const struct attribute_group thermal_temp_input8_group = {
      .attrs = &thermal_temp_input_attr[8]
};

#undef THERMAL_SENSOR_ATTR_TEMP
#undef THERMAL_ATTRS

/* --------------------------------------------------------------------- */

static int __init thermal_init(struct ibm_init_struct *iibm)
{
      u8 t, ta1, ta2;
      int i;
      int acpi_tmp7;
      int res;

      vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");

      acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");

      if (thinkpad_id.ec_model) {
            /*
             * Direct EC access mode: sensors at registers
             * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
             * non-implemented, thermal sensors return 0x80 when
             * not available
             */

            ta1 = ta2 = 0;
            for (i = 0; i < 8; i++) {
                  if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
                        ta1 |= t;
                  } else {
                        ta1 = 0;
                        break;
                  }
                  if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
                        ta2 |= t;
                  } else {
                        ta1 = 0;
                        break;
                  }
            }
            if (ta1 == 0) {
                  /* This is sheer paranoia, but we handle it anyway */
                  if (acpi_tmp7) {
                        printk(IBM_ERR
                               "ThinkPad ACPI EC access misbehaving, "
                               "falling back to ACPI TMPx access mode\n");
                        thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
                  } else {
                        printk(IBM_ERR
                               "ThinkPad ACPI EC access misbehaving, "
                               "disabling thermal sensors access\n");
                        thermal_read_mode = TPACPI_THERMAL_NONE;
                  }
            } else {
                  thermal_read_mode =
                      (ta2 != 0) ?
                      TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
            }
      } else if (acpi_tmp7) {
            if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
                  /* 600e/x, 770e, 770x */
                  thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
            } else {
                  /* Standard ACPI TMPx access, max 8 sensors */
                  thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
            }
      } else {
            /* temperatures not supported on 570, G4x, R30, R31, R32 */
            thermal_read_mode = TPACPI_THERMAL_NONE;
      }

      vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
            str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
            thermal_read_mode);

      switch(thermal_read_mode) {
      case TPACPI_THERMAL_TPEC_16:
            res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
                        &thermal_temp_input16_group);
            if (res)
                  return res;
            break;
      case TPACPI_THERMAL_TPEC_8:
      case TPACPI_THERMAL_ACPI_TMP07:
      case TPACPI_THERMAL_ACPI_UPDT:
            res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
                        &thermal_temp_input8_group);
            if (res)
                  return res;
            break;
      case TPACPI_THERMAL_NONE:
      default:
            return 1;
      }

      return 0;
}

static void thermal_exit(void)
{
      switch(thermal_read_mode) {
      case TPACPI_THERMAL_TPEC_16:
            sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
                           &thermal_temp_input16_group);
            break;
      case TPACPI_THERMAL_TPEC_8:
      case TPACPI_THERMAL_ACPI_TMP07:
      case TPACPI_THERMAL_ACPI_UPDT:
            sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
                           &thermal_temp_input16_group);
            break;
      case TPACPI_THERMAL_NONE:
      default:
            break;
      }
}

/* idx is zero-based */
static int thermal_get_sensor(int idx, s32 *value)
{
      int t;
      s8 tmp;
      char tmpi[5];

      t = TP_EC_THERMAL_TMP0;

      switch (thermal_read_mode) {
#if TPACPI_MAX_THERMAL_SENSORS >= 16
      case TPACPI_THERMAL_TPEC_16:
            if (idx >= 8 && idx <= 15) {
                  t = TP_EC_THERMAL_TMP8;
                  idx -= 8;
            }
            /* fallthrough */
#endif
      case TPACPI_THERMAL_TPEC_8:
            if (idx <= 7) {
                  if (!acpi_ec_read(t + idx, &tmp))
                        return -EIO;
                  *value = tmp * 1000;
                  return 0;
            }
            break;

      case TPACPI_THERMAL_ACPI_UPDT:
            if (idx <= 7) {
                  snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
                  if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
                        return -EIO;
                  if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
                        return -EIO;
                  *value = (t - 2732) * 100;
                  return 0;
            }
            break;

      case TPACPI_THERMAL_ACPI_TMP07:
            if (idx <= 7) {
                  snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
                  if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
                        return -EIO;
                  if (t > 127 || t < -127)
                        t = TP_EC_THERMAL_TMP_NA;
                  *value = t * 1000;
                  return 0;
            }
            break;

      case TPACPI_THERMAL_NONE:
      default:
            return -ENOSYS;
      }

      return -EINVAL;
}

static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
{
      int res, i;
      int n;

      n = 8;
      i = 0;

      if (!s)
            return -EINVAL;

      if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
            n = 16;

      for(i = 0 ; i < n; i++) {
            res = thermal_get_sensor(i, &s->temp[i]);
            if (res)
                  return res;
      }

      return n;
}

static int thermal_read(char *p)
{
      int len = 0;
      int n, i;
      struct ibm_thermal_sensors_struct t;

      n = thermal_get_sensors(&t);
      if (unlikely(n < 0))
            return n;

      len += sprintf(p + len, "temperatures:\t");

      if (n > 0) {
            for (i = 0; i < (n - 1); i++)
                  len += sprintf(p + len, "%d ", t.temp[i] / 1000);
            len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
      } else
            len += sprintf(p + len, "not supported\n");

      return len;
}

static struct ibm_struct thermal_driver_data = {
      .name = "thermal",
      .read = thermal_read,
      .exit = thermal_exit,
};

/*************************************************************************
 * EC Dump subdriver
 */

static u8 ecdump_regs[256];

static int ecdump_read(char *p)
{
      int len = 0;
      int i, j;
      u8 v;

      len += sprintf(p + len, "EC      "
                   " +00 +01 +02 +03 +04 +05 +06 +07"
                   " +08 +09 +0a +0b +0c +0d +0e +0f\n");
      for (i = 0; i < 256; i += 16) {
            len += sprintf(p + len, "EC 0x%02x:", i);
            for (j = 0; j < 16; j++) {
                  if (!acpi_ec_read(i + j, &v))
                        break;
                  if (v != ecdump_regs[i + j])
                        len += sprintf(p + len, " *%02x", v);
                  else
                        len += sprintf(p + len, "  %02x", v);
                  ecdump_regs[i + j] = v;
            }
            len += sprintf(p + len, "\n");
            if (j != 16)
                  break;
      }

      /* These are way too dangerous to advertise openly... */
#if 0
      len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
                   " (<offset> is 00-ff, <value> is 00-ff)\n");
      len += sprintf(p + len, "commands:\t0x<offset> <value>  "
                   " (<offset> is 00-ff, <value> is 0-255)\n");
#endif
      return len;
}

static int ecdump_write(char *buf)
{
      char *cmd;
      int i, v;

      while ((cmd = next_cmd(&buf))) {
            if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
                  /* i and v set */
            } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
                  /* i and v set */
            } else
                  return -EINVAL;
            if (i >= 0 && i < 256 && v >= 0 && v < 256) {
                  if (!acpi_ec_write(i, v))
                        return -EIO;
            } else
                  return -EINVAL;
      }

      return 0;
}

static struct ibm_struct ecdump_driver_data = {
      .name = "ecdump",
      .read = ecdump_read,
      .write = ecdump_write,
      .flags.experimental = 1,
};

/*************************************************************************
 * Backlight/brightness subdriver
 */

static struct backlight_device *ibm_backlight_device;

static struct backlight_ops ibm_backlight_data = {
        .get_brightness = brightness_get,
        .update_status  = brightness_update_status,
};

static struct mutex brightness_mutex;

static int __init tpacpi_query_bcll_levels(acpi_handle handle)
{
      struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
      union acpi_object *obj;
      int rc;

      if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
            obj = (union acpi_object *)buffer.pointer;
            if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
                  printk(IBM_ERR "Unknown BCLL data, "
                         "please report this to %s\n", IBM_MAIL);
                  rc = 0;
            } else {
                  rc = obj->package.count;
            }
      } else {
            return 0;
      }

      kfree(buffer.pointer);
      return rc;
}

static acpi_status __init brightness_find_bcll(acpi_handle handle, u32 lvl,
                              void *context, void **rv)
{
      char name[ACPI_PATH_SEGMENT_LENGTH];
      struct acpi_buffer buffer = { sizeof(name), &name };

      if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
          !strncmp("BCLL", name, sizeof(name) - 1)) {
            if (tpacpi_query_bcll_levels(handle) == 16) {
                  *rv = handle;
                  return AE_CTRL_TERMINATE;
            } else {
                  return AE_OK;
            }
      } else {
            return AE_OK;
      }
}

static int __init brightness_check_levels(void)
{
      int status;
      void *found_node = NULL;

      if (!vid_handle) {
            IBM_ACPIHANDLE_INIT(vid);
      }
      if (!vid_handle)
            return 0;

      /* Search for a BCLL package with 16 levels */
      status = acpi_walk_namespace(ACPI_TYPE_PACKAGE, vid_handle, 3,
                              brightness_find_bcll, NULL, &found_node);

      return (ACPI_SUCCESS(status) && found_node != NULL);
}

static acpi_status __init brightness_find_bcl(acpi_handle handle, u32 lvl,
                              void *context, void **rv)
{
      char name[ACPI_PATH_SEGMENT_LENGTH];
      struct acpi_buffer buffer = { sizeof(name), &name };

      if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
          !strncmp("_BCL", name, sizeof(name) - 1)) {
            *rv = handle;
            return AE_CTRL_TERMINATE;
      } else {
            return AE_OK;
      }
}

static int __init brightness_check_std_acpi_support(void)
{
      int status;
      void *found_node = NULL;

      if (!vid_handle) {
            IBM_ACPIHANDLE_INIT(vid);
      }
      if (!vid_handle)
            return 0;

      /* Search for a _BCL method, but don't execute it */
      status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
                                   brightness_find_bcl, NULL, &found_node);

      return (ACPI_SUCCESS(status) && found_node != NULL);
}

static int __init brightness_init(struct ibm_init_struct *iibm)
{
      int b;

      vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");

      mutex_init(&brightness_mutex);

      if (!brightness_enable) {
            dbg_printk(TPACPI_DBG_INIT,
                       "brightness support disabled by module parameter\n");
            return 1;
      } else if (brightness_enable > 1) {
            if (brightness_check_std_acpi_support()) {
                  printk(IBM_NOTICE
                         "standard ACPI backlight interface available, not loading native one...\n");
                  return 1;
            }
      }

      if (!brightness_mode) {
            if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
                  brightness_mode = 2;
            else
                  brightness_mode = 3;

            dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
                  brightness_mode);
      }

      if (brightness_mode > 3)
            return -EINVAL;

      tp_features.bright_16levels =
                  thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO &&
                  brightness_check_levels();

      b = brightness_get(NULL);
      if (b < 0)
            return 1;

      if (tp_features.bright_16levels)
            printk(IBM_INFO "detected a 16-level brightness capable ThinkPad\n");

      ibm_backlight_device = backlight_device_register(
                              TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
                              &ibm_backlight_data);
      if (IS_ERR(ibm_backlight_device)) {
            printk(IBM_ERR "Could not register backlight device\n");
            return PTR_ERR(ibm_backlight_device);
      }
      vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");

      ibm_backlight_device->props.max_brightness =
                        (tp_features.bright_16levels)? 15 : 7;
      ibm_backlight_device->props.brightness = b;
      backlight_update_status(ibm_backlight_device);

      return 0;
}

static void brightness_exit(void)
{
      if (ibm_backlight_device) {
            vdbg_printk(TPACPI_DBG_EXIT,
                      "calling backlight_device_unregister()\n");
            backlight_device_unregister(ibm_backlight_device);
            ibm_backlight_device = NULL;
      }
}

static int brightness_update_status(struct backlight_device *bd)
{
      /* it is the backlight class's job (caller) to handle
       * EINTR and other errors properly */
      return brightness_set(
            (bd->props.fb_blank == FB_BLANK_UNBLANK &&
             bd->props.power == FB_BLANK_UNBLANK) ?
                        bd->props.brightness : 0);
}

/*
 * ThinkPads can read brightness from two places: EC 0x31, or
 * CMOS NVRAM byte 0x5E, bits 0-3.
 */
static int brightness_get(struct backlight_device *bd)
{
      u8 lec = 0, lcmos = 0, level = 0;

      if (brightness_mode & 1) {
            if (!acpi_ec_read(brightness_offset, &lec))
                  return -EIO;
            lec &= (tp_features.bright_16levels)? 0x0f : 0x07;
            level = lec;
      };
      if (brightness_mode & 2) {
            lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
                   & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
                  >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
            lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
            level = lcmos;
      }

      if (brightness_mode == 3 && lec != lcmos) {
            printk(IBM_ERR
                  "CMOS NVRAM (%u) and EC (%u) do not agree "
                  "on display brightness level\n",
                  (unsigned int) lcmos,
                  (unsigned int) lec);
            return -EIO;
      }

      return level;
}

/* May return EINTR which can always be mapped to ERESTARTSYS */
static int brightness_set(int value)
{
      int cmos_cmd, inc, i, res;
      int current_value;

      if (value > ((tp_features.bright_16levels)? 15 : 7))
            return -EINVAL;

      res = mutex_lock_interruptible(&brightness_mutex);
      if (res < 0)
            return res;

      current_value = brightness_get(NULL);
      if (current_value < 0) {
            res = current_value;
            goto errout;
      }

      cmos_cmd = value > current_value ?
                  TP_CMOS_BRIGHTNESS_UP :
                  TP_CMOS_BRIGHTNESS_DOWN;
      inc = (value > current_value)? 1 : -1;

      res = 0;
      for (i = current_value; i != value; i += inc) {
            if ((brightness_mode & 2) &&
                issue_thinkpad_cmos_command(cmos_cmd)) {
                  res = -EIO;
                  goto errout;
            }
            if ((brightness_mode & 1) &&
                !acpi_ec_write(brightness_offset, i + inc)) {
                  res = -EIO;
                  goto errout;;
            }
      }

errout:
      mutex_unlock(&brightness_mutex);
      return res;
}

static int brightness_read(char *p)
{
      int len = 0;
      int level;

      if ((level = brightness_get(NULL)) < 0) {
            len += sprintf(p + len, "level:\t\tunreadable\n");
      } else {
            len += sprintf(p + len, "level:\t\t%d\n", level);
            len += sprintf(p + len, "commands:\tup, down\n");
            len += sprintf(p + len, "commands:\tlevel <level>"
                         " (<level> is 0-%d)\n",
                         (tp_features.bright_16levels) ? 15 : 7);
      }

      return len;
}

static int brightness_write(char *buf)
{
      int level;
      int rc;
      char *cmd;
      int max_level = (tp_features.bright_16levels) ? 15 : 7;

      level = brightness_get(NULL);
      if (level < 0)
            return level;

      while ((cmd = next_cmd(&buf))) {
            if (strlencmp(cmd, "up") == 0) {
                  if (level < max_level)
                        level++;
            } else if (strlencmp(cmd, "down") == 0) {
                  if (level > 0)
                        level--;
            } else if (sscanf(cmd, "level %d", &level) == 1 &&
                     level >= 0 && level <= max_level) {
                  /* new level set */
            } else
                  return -EINVAL;
      }

      /*
       * Now we know what the final level should be, so we try to set it.
       * Doing it this way makes the syscall restartable in case of EINTR
       */
      rc = brightness_set(level);
      return (rc == -EINTR)? ERESTARTSYS : rc;
}

static struct ibm_struct brightness_driver_data = {
      .name = "brightness",
      .read = brightness_read,
      .write = brightness_write,
      .exit = brightness_exit,
};

/*************************************************************************
 * Volume subdriver
 */

static int volume_read(char *p)
{
      int len = 0;
      u8 level;

      if (!acpi_ec_read(volume_offset, &level)) {
            len += sprintf(p + len, "level:\t\tunreadable\n");
      } else {
            len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
            len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
            len += sprintf(p + len, "commands:\tup, down, mute\n");
            len += sprintf(p + len, "commands:\tlevel <level>"
                         " (<level> is 0-15)\n");
      }

      return len;
}

static int volume_write(char *buf)
{
      int cmos_cmd, inc, i;
      u8 level, mute;
      int new_level, new_mute;
      char *cmd;

      while ((cmd = next_cmd(&buf))) {
            if (!acpi_ec_read(volume_offset, &level))
                  return -EIO;
            new_mute = mute = level & 0x40;
            new_level = level = level & 0xf;

            if (strlencmp(cmd, "up") == 0) {
                  if (mute)
                        new_mute = 0;
                  else
                        new_level = level == 15 ? 15 : level + 1;
            } else if (strlencmp(cmd, "down") == 0) {
                  if (mute)
                        new_mute = 0;
                  else
                        new_level = level == 0 ? 0 : level - 1;
            } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
                     new_level >= 0 && new_level <= 15) {
                  /* new_level set */
            } else if (strlencmp(cmd, "mute") == 0) {
                  new_mute = 0x40;
            } else
                  return -EINVAL;

            if (new_level != level) {     /* mute doesn't change */
                  cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
                  inc = new_level > level ? 1 : -1;

                  if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
                             !acpi_ec_write(volume_offset, level)))
                        return -EIO;

                  for (i = level; i != new_level; i += inc)
                        if (issue_thinkpad_cmos_command(cmos_cmd) ||
                            !acpi_ec_write(volume_offset, i + inc))
                              return -EIO;

                  if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
                             !acpi_ec_write(volume_offset,
                                        new_level + mute)))
                        return -EIO;
            }

            if (new_mute != mute) { /* level doesn't change */
                  cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;

                  if (issue_thinkpad_cmos_command(cmos_cmd) ||
                      !acpi_ec_write(volume_offset, level + new_mute))
                        return -EIO;
            }
      }

      return 0;
}

static struct ibm_struct volume_driver_data = {
      .name = "volume",
      .read = volume_read,
      .write = volume_write,
};

/*************************************************************************
 * Fan subdriver
 */

/*
 * FAN ACCESS MODES
 *
 * TPACPI_FAN_RD_ACPI_GFAN:
 *    ACPI GFAN method: returns fan level
 *
 *    see TPACPI_FAN_WR_ACPI_SFAN
 *    EC 0x2f (HFSP) not available if GFAN exists
 *
 * TPACPI_FAN_WR_ACPI_SFAN:
 *    ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
 *
 *    EC 0x2f (HFSP) might be available *for reading*, but do not use
 *    it for writing.
 *
 * TPACPI_FAN_WR_TPEC:
 *    ThinkPad EC register 0x2f (HFSP): fan control loop mode
 *    Supported on almost all ThinkPads
 *
 *    Fan speed changes of any sort (including those caused by the
 *    disengaged mode) are usually done slowly by the firmware as the
 *    maximum ammount of fan duty cycle change per second seems to be
 *    limited.
 *
 *    Reading is not available if GFAN exists.
 *    Writing is not available if SFAN exists.
 *
 *    Bits
 *     7    automatic mode engaged;
 *          (default operation mode of the ThinkPad)
 *          fan level is ignored in this mode.
 *     6    full speed mode (takes precedence over bit 7);
 *          not available on all thinkpads.  May disable
 *          the tachometer while the fan controller ramps up
 *          the speed (which can take up to a few *minutes*).
 *          Speeds up fan to 100% duty-cycle, which is far above
 *          the standard RPM levels.  It is not impossible that
 *          it could cause hardware damage.
 *    5-3   unused in some models.  Extra bits for fan level
 *          in others, but still useless as all values above
 *          7 map to the same speed as level 7 in these models.
 *    2-0   fan level (0..7 usually)
 *                0x00 = stop
 *                0x07 = max (set when temperatures critical)
 *          Some ThinkPads may have other levels, see
 *          TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
 *
 *    FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
 *    boot. Apparently the EC does not intialize it, so unless ACPI DSDT
 *    does so, its initial value is meaningless (0x07).
 *
 *    For firmware bugs, refer to:
 *    http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
 *
 *    ----
 *
 *    ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
 *    Main fan tachometer reading (in RPM)
 *
 *    This register is present on all ThinkPads with a new-style EC, and
 *    it is known not to be present on the A21m/e, and T22, as there is
 *    something else in offset 0x84 according to the ACPI DSDT.  Other
 *    ThinkPads from this same time period (and earlier) probably lack the
 *    tachometer as well.
 *
 *    Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
 *    was never fixed by IBM to report the EC firmware version string
 *    probably support the tachometer (like the early X models), so
 *    detecting it is quite hard.  We need more data to know for sure.
 *
 *    FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
 *    might result.
 *
 *    FIRMWARE BUG: may go stale while the EC is switching to full speed
 *    mode.
 *
 *    For firmware bugs, refer to:
 *    http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
 *
 * TPACPI_FAN_WR_ACPI_FANS:
 *    ThinkPad X31, X40, X41.  Not available in the X60.
 *
 *    FANS ACPI handle: takes three arguments: low speed, medium speed,
 *    high speed.  ACPI DSDT seems to map these three speeds to levels
 *    as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
 *    (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
 *
 *    The speeds are stored on handles
 *    (FANA:FAN9), (FANC:FANB), (FANE:FAND).
 *
 *    There are three default speed sets, acessible as handles:
 *    FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
 *
 *    ACPI DSDT switches which set is in use depending on various
 *    factors.
 *
 *    TPACPI_FAN_WR_TPEC is also available and should be used to
 *    command the fan.  The X31/X40/X41 seems to have 8 fan levels,
 *    but the ACPI tables just mention level 7.
 */

static enum fan_status_access_mode fan_status_access_mode;
static enum fan_control_access_mode fan_control_access_mode;
static enum fan_control_commands fan_control_commands;

static u8 fan_control_initial_status;
static u8 fan_control_desired_level;

static void fan_watchdog_fire(struct work_struct *ignored);
static int fan_watchdog_maxinterval;
static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);

IBM_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
IBM_HANDLE(gfan, ec, "GFAN",  /* 570 */
         "\\FSPD",            /* 600e/x, 770e, 770x */
         );             /* all others */
IBM_HANDLE(sfan, ec, "SFAN",  /* 570 */
         "JFNS",        /* 770x-JL */
         );             /* all others */

/*
 * SYSFS fan layout: hwmon compatible (device)
 *
 * pwm*_enable:
 *    0: "disengaged" mode
 *    1: manual mode
 *    2: native EC "auto" mode (recommended, hardware default)
 *
 * pwm*: set speed in manual mode, ignored otherwise.
 *    0 is level 0; 255 is level 7. Intermediate points done with linear
 *    interpolation.
 *
 * fan*_input: tachometer reading, RPM
 *
 *
 * SYSFS fan layout: extensions
 *
 * fan_watchdog (driver):
 *    fan watchdog interval in seconds, 0 disables (default), max 120
 */

/* sysfs fan pwm1_enable ----------------------------------------------- */
static ssize_t fan_pwm1_enable_show(struct device *dev,
                            struct device_attribute *attr,
                            char *buf)
{
      int res, mode;
      u8 status;

      res = fan_get_status_safe(&status);
      if (res)
            return res;

      if (unlikely(tp_features.fan_ctrl_status_undef)) {
            if (status != fan_control_initial_status) {
                  tp_features.fan_ctrl_status_undef = 0;
            } else {
                  /* Return most likely status. In fact, it
                   * might be the only possible status */
                  status = TP_EC_FAN_AUTO;
            }
      }

      if (status & TP_EC_FAN_FULLSPEED) {
            mode = 0;
      } else if (status & TP_EC_FAN_AUTO) {
            mode = 2;
      } else
            mode = 1;

      return snprintf(buf, PAGE_SIZE, "%d\n", mode);
}

static ssize_t fan_pwm1_enable_store(struct device *dev,
                             struct device_attribute *attr,
                             const char *buf, size_t count)
{
      unsigned long t;
      int res, level;

      if (parse_strtoul(buf, 2, &t))
            return -EINVAL;

      switch (t) {
      case 0:
            level = TP_EC_FAN_FULLSPEED;
            break;
      case 1:
            level = TPACPI_FAN_LAST_LEVEL;
            break;
      case 2:
            level = TP_EC_FAN_AUTO;
            break;
      case 3:
            /* reserved for software-controlled auto mode */
            return -ENOSYS;
      default:
            return -EINVAL;
      }

      res = fan_set_level_safe(level);
      if (res == -ENXIO)
            return -EINVAL;
      else if (res < 0)
            return res;

      fan_watchdog_reset();

      return count;
}

static struct device_attribute dev_attr_fan_pwm1_enable =
      __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
            fan_pwm1_enable_show, fan_pwm1_enable_store);

/* sysfs fan pwm1 ------------------------------------------------------ */
static ssize_t fan_pwm1_show(struct device *dev,
                       struct device_attribute *attr,
                       char *buf)
{
      int res;
      u8 status;

      res = fan_get_status_safe(&status);
      if (res)
            return res;

      if (unlikely(tp_features.fan_ctrl_status_undef)) {
            if (status != fan_control_initial_status) {
                  tp_features.fan_ctrl_status_undef = 0;
            } else {
                  status = TP_EC_FAN_AUTO;
            }
      }

      if ((status &
           (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
            status = fan_control_desired_level;

      if (status > 7)
            status = 7;

      return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
}

static ssize_t fan_pwm1_store(struct device *dev,
                        struct device_attribute *attr,
                        const char *buf, size_t count)
{
      unsigned long s;
      int rc;
      u8 status, newlevel;

      if (parse_strtoul(buf, 255, &s))
            return -EINVAL;

      /* scale down from 0-255 to 0-7 */
      newlevel = (s >> 5) & 0x07;

      if (mutex_lock_interruptible(&fan_mutex))
            return -ERESTARTSYS;

      rc = fan_get_status(&status);
      if (!rc && (status &
                (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
            rc = fan_set_level(newlevel);
            if (rc == -ENXIO)
                  rc = -EINVAL;
            else if (!rc) {
                  fan_update_desired_level(newlevel);
                  fan_watchdog_reset();
            }
      }

      mutex_unlock(&fan_mutex);
      return (rc)? rc : count;
}

static struct device_attribute dev_attr_fan_pwm1 =
      __ATTR(pwm1, S_IWUSR | S_IRUGO,
            fan_pwm1_show, fan_pwm1_store);

/* sysfs fan fan1_input ------------------------------------------------ */
static ssize_t fan_fan1_input_show(struct device *dev,
                     struct device_attribute *attr,
                     char *buf)
{
      int res;
      unsigned int speed;

      res = fan_get_speed(&speed);
      if (res < 0)
            return res;

      return snprintf(buf, PAGE_SIZE, "%u\n", speed);
}

static struct device_attribute dev_attr_fan_fan1_input =
      __ATTR(fan1_input, S_IRUGO,
            fan_fan1_input_show, NULL);

/* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
                             char *buf)
{
      return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
}

static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
                              const char *buf, size_t count)
{
      unsigned long t;

      if (parse_strtoul(buf, 120, &t))
            return -EINVAL;

      if (!fan_control_allowed)
            return -EPERM;

      fan_watchdog_maxinterval = t;
      fan_watchdog_reset();

      return count;
}

static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
            fan_fan_watchdog_show, fan_fan_watchdog_store);

/* --------------------------------------------------------------------- */
static struct attribute *fan_attributes[] = {
      &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
      &dev_attr_fan_fan1_input.attr,
      NULL
};

static const struct attribute_group fan_attr_group = {
      .attrs = fan_attributes,
};

static int __init fan_init(struct ibm_init_struct *iibm)
{
      int rc;

      vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");

      mutex_init(&fan_mutex);
      fan_status_access_mode = TPACPI_FAN_NONE;
      fan_control_access_mode = TPACPI_FAN_WR_NONE;
      fan_control_commands = 0;
      fan_watchdog_maxinterval = 0;
      tp_features.fan_ctrl_status_undef = 0;
      fan_control_desired_level = 7;

      IBM_ACPIHANDLE_INIT(fans);
      IBM_ACPIHANDLE_INIT(gfan);
      IBM_ACPIHANDLE_INIT(sfan);

      if (gfan_handle) {
            /* 570, 600e/x, 770e, 770x */
            fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
      } else {
            /* all other ThinkPads: note that even old-style
             * ThinkPad ECs supports the fan control register */
            if (likely(acpi_ec_read(fan_status_offset,
                              &fan_control_initial_status))) {
                  fan_status_access_mode = TPACPI_FAN_RD_TPEC;

                  /* In some ThinkPads, neither the EC nor the ACPI
                   * DSDT initialize the fan status, and it ends up
                   * being set to 0x07 when it *could* be either
                   * 0x07 or 0x80.
                   *
                   * Enable for TP-1Y (T43), TP-78 (R51e),
                   * TP-76 (R52), TP-70 (T43, R52), which are known
                   * to be buggy. */
                  if (fan_control_initial_status == 0x07) {
                        switch (thinkpad_id.ec_model) {
                        case 0x5931: /* TP-1Y */
                        case 0x3837: /* TP-78 */
                        case 0x3637: /* TP-76 */
                        case 0x3037: /* TP-70 */
                              printk(IBM_NOTICE
                                     "fan_init: initial fan status is "
                                     "unknown, assuming it is in auto "
                                     "mode\n");
                              tp_features.fan_ctrl_status_undef = 1;
                              ;;
                        }
                  }
            } else {
                  printk(IBM_ERR
                         "ThinkPad ACPI EC access misbehaving, "
                         "fan status and control unavailable\n");
                  return 1;
            }
      }

      if (sfan_handle) {
            /* 570, 770x-JL */
            fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
            fan_control_commands |=
                TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
      } else {
            if (!gfan_handle) {
                  /* gfan without sfan means no fan control */
                  /* all other models implement TP EC 0x2f control */

                  if (fans_handle) {
                        /* X31, X40, X41 */
                        fan_control_access_mode =
                            TPACPI_FAN_WR_ACPI_FANS;
                        fan_control_commands |=
                            TPACPI_FAN_CMD_SPEED |
                            TPACPI_FAN_CMD_LEVEL |
                            TPACPI_FAN_CMD_ENABLE;
                  } else {
                        fan_control_access_mode = TPACPI_FAN_WR_TPEC;
                        fan_control_commands |=
                            TPACPI_FAN_CMD_LEVEL |
                            TPACPI_FAN_CMD_ENABLE;
                  }
            }
      }

      vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
            str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
              fan_control_access_mode != TPACPI_FAN_WR_NONE),
            fan_status_access_mode, fan_control_access_mode);

      /* fan control master switch */
      if (!fan_control_allowed) {
            fan_control_access_mode = TPACPI_FAN_WR_NONE;
            fan_control_commands = 0;
            dbg_printk(TPACPI_DBG_INIT,
                     "fan control features disabled by parameter\n");
      }

      /* update fan_control_desired_level */
      if (fan_status_access_mode != TPACPI_FAN_NONE)
            fan_get_status_safe(NULL);

      if (fan_status_access_mode != TPACPI_FAN_NONE ||
          fan_control_access_mode != TPACPI_FAN_WR_NONE) {
            rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
                               &fan_attr_group);
            if (!(rc < 0))
                  rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
                              &driver_attr_fan_watchdog);
            if (rc < 0)
                  return rc;
            return 0;
      } else
            return 1;
}

/*
 * Call with fan_mutex held
 */
static void fan_update_desired_level(u8 status)
{
      if ((status &
           (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
            if (status > 7)
                  fan_control_desired_level = 7;
            else
                  fan_control_desired_level = status;
      }
}

static int fan_get_status(u8 *status)
{
      u8 s;

      /* TODO:
       * Add TPACPI_FAN_RD_ACPI_FANS ? */

      switch (fan_status_access_mode) {
      case TPACPI_FAN_RD_ACPI_GFAN:
            /* 570, 600e/x, 770e, 770x */

            if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
                  return -EIO;

            if (likely(status))
                  *status = s & 0x07;

            break;

      case TPACPI_FAN_RD_TPEC:
            /* all except 570, 600e/x, 770e, 770x */
            if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
                  return -EIO;

            if (likely(status))
                  *status = s;

            break;

      default:
            return -ENXIO;
      }

      return 0;
}

static int fan_get_status_safe(u8 *status)
{
      int rc;
      u8 s;

      if (mutex_lock_interruptible(&fan_mutex))
            return -ERESTARTSYS;
      rc = fan_get_status(&s);
      if (!rc)
            fan_update_desired_level(s);
      mutex_unlock(&fan_mutex);

      if (status)
            *status = s;

      return rc;
}

static void fan_exit(void)
{
      vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending fan watchdog tasks\n");

      /* FIXME: can we really do this unconditionally? */
      sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
      driver_remove_file(&tpacpi_hwmon_pdriver.driver, &driver_attr_fan_watchdog);

      cancel_delayed_work(&fan_watchdog_task);
      flush_scheduled_work();
}

static int fan_get_speed(unsigned int *speed)
{
      u8 hi, lo;

      switch (fan_status_access_mode) {
      case TPACPI_FAN_RD_TPEC:
            /* all except 570, 600e/x, 770e, 770x */
            if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
                       !acpi_ec_read(fan_rpm_offset + 1, &hi)))
                  return -EIO;

            if (likely(speed))
                  *speed = (hi << 8) | lo;

            break;

      default:
            return -ENXIO;
      }

      return 0;
}

static void fan_watchdog_fire(struct work_struct *ignored)
{
      int rc;

      if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
            return;

      printk(IBM_NOTICE "fan watchdog: enabling fan\n");
      rc = fan_set_enable();
      if (rc < 0) {
            printk(IBM_ERR "fan watchdog: error %d while enabling fan, "
                  "will try again later...\n", -rc);
            /* reschedule for later */
            fan_watchdog_reset();
      }
}

static void fan_watchdog_reset(void)
{
      static int fan_watchdog_active;

      if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
            return;

      if (fan_watchdog_active)
            cancel_delayed_work(&fan_watchdog_task);

      if (fan_watchdog_maxinterval > 0 &&
          tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
            fan_watchdog_active = 1;
            if (!schedule_delayed_work(&fan_watchdog_task,
                        msecs_to_jiffies(fan_watchdog_maxinterval
                                     * 1000))) {
                  printk(IBM_ERR "failed to schedule the fan watchdog, "
                         "watchdog will not trigger\n");
            }
      } else
            fan_watchdog_active = 0;
}

static int fan_set_level(int level)
{
      if (!fan_control_allowed)
            return -EPERM;

      switch (fan_control_access_mode) {
      case TPACPI_FAN_WR_ACPI_SFAN:
            if (level >= 0 && level <= 7) {
                  if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
                        return -EIO;
            } else
                  return -EINVAL;
            break;

      case TPACPI_FAN_WR_ACPI_FANS:
      case TPACPI_FAN_WR_TPEC:
            if ((level != TP_EC_FAN_AUTO) &&
                (level != TP_EC_FAN_FULLSPEED) &&
                ((level < 0) || (level > 7)))
                  return -EINVAL;

            /* safety net should the EC not support AUTO
             * or FULLSPEED mode bits and just ignore them */
            if (level & TP_EC_FAN_FULLSPEED)
                  level |= 7; /* safety min speed 7 */
            else if (level & TP_EC_FAN_FULLSPEED)
                  level |= 4; /* safety min speed 4 */

            if (!acpi_ec_write(fan_status_offset, level))
                  return -EIO;
            else
                  tp_features.fan_ctrl_status_undef = 0;
            break;

      default:
            return -ENXIO;
      }
      return 0;
}

static int fan_set_level_safe(int level)
{
      int rc;

      if (!fan_control_allowed)
            return -EPERM;

      if (mutex_lock_interruptible(&fan_mutex))
            return -ERESTARTSYS;

      if (level == TPACPI_FAN_LAST_LEVEL)
            level = fan_control_desired_level;

      rc = fan_set_level(level);
      if (!rc)
            fan_update_desired_level(level);

      mutex_unlock(&fan_mutex);
      return rc;
}

static int fan_set_enable(void)
{
      u8 s;
      int rc;

      if (!fan_control_allowed)
            return -EPERM;

      if (mutex_lock_interruptible(&fan_mutex))
            return -ERESTARTSYS;

      switch (fan_control_access_mode) {
      case TPACPI_FAN_WR_ACPI_FANS:
      case TPACPI_FAN_WR_TPEC:
            rc = fan_get_status(&s);
            if (rc < 0)
                  break;

            /* Don't go out of emergency fan mode */
            if (s != 7) {
                  s &= 0x07;
                  s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
            }

            if (!acpi_ec_write(fan_status_offset, s))
                  rc = -EIO;
            else {
                  tp_features.fan_ctrl_status_undef = 0;
                  rc = 0;
            }
            break;

      case TPACPI_FAN_WR_ACPI_SFAN:
            rc = fan_get_status(&s);
            if (rc < 0)
                  break;

            s &= 0x07;

            /* Set fan to at least level 4 */
            s |= 4;

            if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
                  rc= -EIO;
            else
                  rc = 0;
            break;

      default:
            rc = -ENXIO;
      }

      mutex_unlock(&fan_mutex);
      return rc;
}

static int fan_set_disable(void)
{
      int rc;

      if (!fan_control_allowed)
            return -EPERM;

      if (mutex_lock_interruptible(&fan_mutex))
            return -ERESTARTSYS;

      rc = 0;
      switch (fan_control_access_mode) {
      case TPACPI_FAN_WR_ACPI_FANS:
      case TPACPI_FAN_WR_TPEC:
            if (!acpi_ec_write(fan_status_offset, 0x00))
                  rc = -EIO;
            else {
                  fan_control_desired_level = 0;
                  tp_features.fan_ctrl_status_undef = 0;
            }
            break;

      case TPACPI_FAN_WR_ACPI_SFAN:
            if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
                  rc = -EIO;
            else
                  fan_control_desired_level = 0;
            break;

      default:
            rc = -ENXIO;
      }


      mutex_unlock(&fan_mutex);
      return rc;
}

static int fan_set_speed(int speed)
{
      int rc;

      if (!fan_control_allowed)
            return -EPERM;

      if (mutex_lock_interruptible(&fan_mutex))
            return -ERESTARTSYS;

      rc = 0;
      switch (fan_control_access_mode) {
      case TPACPI_FAN_WR_ACPI_FANS:
            if (speed >= 0 && speed <= 65535) {
                  if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
                              speed, speed, speed))
                        rc = -EIO;
            } else
                  rc = -EINVAL;
            break;

      default:
            rc = -ENXIO;
      }

      mutex_unlock(&fan_mutex);
      return rc;
}

static int fan_read(char *p)
{
      int len = 0;
      int rc;
      u8 status;
      unsigned int speed = 0;

      switch (fan_status_access_mode) {
      case TPACPI_FAN_RD_ACPI_GFAN:
            /* 570, 600e/x, 770e, 770x */
            if ((rc = fan_get_status_safe(&status)) < 0)
                  return rc;

            len += sprintf(p + len, "status:\t\t%s\n"
                         "level:\t\t%d\n",
                         (status != 0) ? "enabled" : "disabled", status);
            break;

      case TPACPI_FAN_RD_TPEC:
            /* all except 570, 600e/x, 770e, 770x */
            if ((rc = fan_get_status_safe(&status)) < 0)
                  return rc;

            if (unlikely(tp_features.fan_ctrl_status_undef)) {
                  if (status != fan_control_initial_status)
                        tp_features.fan_ctrl_status_undef = 0;
                  else
                        /* Return most likely status. In fact, it
                         * might be the only possible status */
                        status = TP_EC_FAN_AUTO;
            }

            len += sprintf(p + len, "status:\t\t%s\n",
                         (status != 0) ? "enabled" : "disabled");

            if ((rc = fan_get_speed(&speed)) < 0)
                  return rc;

            len += sprintf(p + len, "speed:\t\t%d\n", speed);

            if (status & TP_EC_FAN_FULLSPEED)
                  /* Disengaged mode takes precedence */
                  len += sprintf(p + len, "level:\t\tdisengaged\n");
            else if (status & TP_EC_FAN_AUTO)
                  len += sprintf(p + len, "level:\t\tauto\n");
            else
                  len += sprintf(p + len, "level:\t\t%d\n", status);
            break;

      case TPACPI_FAN_NONE:
      default:
            len += sprintf(p + len, "status:\t\tnot supported\n");
      }

      if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
            len += sprintf(p + len, "commands:\tlevel <level>");

            switch (fan_control_access_mode) {
            case TPACPI_FAN_WR_ACPI_SFAN:
                  len += sprintf(p + len, " (<level> is 0-7)\n");
                  break;

            default:
                  len += sprintf(p + len, " (<level> is 0-7, "
                               "auto, disengaged, full-speed)\n");
                  break;
            }
      }

      if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
            len += sprintf(p + len, "commands:\tenable, disable\n"
                         "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
                         "1-120 (seconds))\n");

      if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
            len += sprintf(p + len, "commands:\tspeed <speed>"
                         " (<speed> is 0-65535)\n");

      return len;
}

static int fan_write_cmd_level(const char *cmd, int *rc)
{
      int level;

      if (strlencmp(cmd, "level auto") == 0)
            level = TP_EC_FAN_AUTO;
      else if ((strlencmp(cmd, "level disengaged") == 0) |
               (strlencmp(cmd, "level full-speed") == 0))
            level = TP_EC_FAN_FULLSPEED;
      else if (sscanf(cmd, "level %d", &level) != 1)
            return 0;

      if ((*rc = fan_set_level_safe(level)) == -ENXIO)
            printk(IBM_ERR "level command accepted for unsupported "
                   "access mode %d", fan_control_access_mode);

      return 1;
}

static int fan_write_cmd_enable(const char *cmd, int *rc)
{
      if (strlencmp(cmd, "enable") != 0)
            return 0;

      if ((*rc = fan_set_enable()) == -ENXIO)
            printk(IBM_ERR "enable command accepted for unsupported "
                   "access mode %d", fan_control_access_mode);

      return 1;
}

static int fan_write_cmd_disable(const char *cmd, int *rc)
{
      if (strlencmp(cmd, "disable") != 0)
            return 0;

      if ((*rc = fan_set_disable()) == -ENXIO)
            printk(IBM_ERR "disable command accepted for unsupported "
                   "access mode %d", fan_control_access_mode);

      return 1;
}

static int fan_write_cmd_speed(const char *cmd, int *rc)
{
      int speed;

      /* TODO:
       * Support speed <low> <medium> <high> ? */

      if (sscanf(cmd, "speed %d", &speed) != 1)
            return 0;

      if ((*rc = fan_set_speed(speed)) == -ENXIO)
            printk(IBM_ERR "speed command accepted for unsupported "
                   "access mode %d", fan_control_access_mode);

      return 1;
}

static int fan_write_cmd_watchdog(const char *cmd, int *rc)
{
      int interval;

      if (sscanf(cmd, "watchdog %d", &interval) != 1)
            return 0;

      if (interval < 0 || interval > 120)
            *rc = -EINVAL;
      else
            fan_watchdog_maxinterval = interval;

      return 1;
}

static int fan_write(char *buf)
{
      char *cmd;
      int rc = 0;

      while (!rc && (cmd = next_cmd(&buf))) {
            if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
                  fan_write_cmd_level(cmd, &rc)) &&
                !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
                  (fan_write_cmd_enable(cmd, &rc) ||
                   fan_write_cmd_disable(cmd, &rc) ||
                   fan_write_cmd_watchdog(cmd, &rc))) &&
                !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
                  fan_write_cmd_speed(cmd, &rc))
                )
                  rc = -EINVAL;
            else if (!rc)
                  fan_watchdog_reset();
      }

      return rc;
}

static struct ibm_struct fan_driver_data = {
      .name = "fan",
      .read = fan_read,
      .write = fan_write,
      .exit = fan_exit,
};

/****************************************************************************
 ****************************************************************************
 *
 * Infrastructure
 *
 ****************************************************************************
 ****************************************************************************/

/* sysfs name ---------------------------------------------------------- */
static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
                     struct device_attribute *attr,
                     char *buf)
{
      return snprintf(buf, PAGE_SIZE, "%s\n", IBM_NAME);
}

static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
      __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);

/* --------------------------------------------------------------------- */

/* /proc support */
static struct proc_dir_entry *proc_dir;

/* Subdriver registry */
static LIST_HEAD(tpacpi_all_drivers);


/*
 * Module and infrastructure proble, init and exit handling
 */

#ifdef CONFIG_THINKPAD_ACPI_DEBUG
static const char * __init str_supported(int is_supported)
{
      static char text_unsupported[] __initdata = "not supported";

      return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
}
#endif /* CONFIG_THINKPAD_ACPI_DEBUG */

static int __init ibm_init(struct ibm_init_struct *iibm)
{
      int ret;
      struct ibm_struct *ibm = iibm->data;
      struct proc_dir_entry *entry;

      BUG_ON(ibm == NULL);

      INIT_LIST_HEAD(&ibm->all_drivers);

      if (ibm->flags.experimental && !experimental)
            return 0;

      dbg_printk(TPACPI_DBG_INIT,
            "probing for %s\n", ibm->name);

      if (iibm->init) {
            ret = iibm->init(iibm);
            if (ret > 0)
                  return 0;   /* probe failed */
            if (ret)
                  return ret;

            ibm->flags.init_called = 1;
      }

      if (ibm->acpi) {
            if (ibm->acpi->hid) {
                  ret = register_tpacpi_subdriver(ibm);
                  if (ret)
                        goto err_out;
            }

            if (ibm->acpi->notify) {
                  ret = setup_acpi_notify(ibm);
                  if (ret == -ENODEV) {
                        printk(IBM_NOTICE "disabling subdriver %s\n",
                              ibm->name);
                        ret = 0;
                        goto err_out;
                  }
                  if (ret < 0)
                        goto err_out;
            }
      }

      dbg_printk(TPACPI_DBG_INIT,
            "%s installed\n", ibm->name);

      if (ibm->read) {
            entry = create_proc_entry(ibm->name,
                                S_IFREG | S_IRUGO | S_IWUSR,
                                proc_dir);
            if (!entry) {
                  printk(IBM_ERR "unable to create proc entry %s\n",
                         ibm->name);
                  ret = -ENODEV;
                  goto err_out;
            }
            entry->owner = THIS_MODULE;
            entry->data = ibm;
            entry->read_proc = &dispatch_procfs_read;
            if (ibm->write)
                  entry->write_proc = &dispatch_procfs_write;
            ibm->flags.proc_created = 1;
      }

      list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);

      return 0;

err_out:
      dbg_printk(TPACPI_DBG_INIT,
            "%s: at error exit path with result %d\n",
            ibm->name, ret);

      ibm_exit(ibm);
      return (ret < 0)? ret : 0;
}

static void ibm_exit(struct ibm_struct *ibm)
{
      dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);

      list_del_init(&ibm->all_drivers);

      if (ibm->flags.acpi_notify_installed) {
            dbg_printk(TPACPI_DBG_EXIT,
                  "%s: acpi_remove_notify_handler\n", ibm->name);
            BUG_ON(!ibm->acpi);
            acpi_remove_notify_handler(*ibm->acpi->handle,
                                 ibm->acpi->type,
                                 dispatch_acpi_notify);
            ibm->flags.acpi_notify_installed = 0;
            ibm->flags.acpi_notify_installed = 0;
      }

      if (ibm->flags.proc_created) {
            dbg_printk(TPACPI_DBG_EXIT,
                  "%s: remove_proc_entry\n", ibm->name);
            remove_proc_entry(ibm->name, proc_dir);
            ibm->flags.proc_created = 0;
      }

      if (ibm->flags.acpi_driver_registered) {
            dbg_printk(TPACPI_DBG_EXIT,
                  "%s: acpi_bus_unregister_driver\n", ibm->name);
            BUG_ON(!ibm->acpi);
            acpi_bus_unregister_driver(ibm->acpi->driver);
            kfree(ibm->acpi->driver);
            ibm->acpi->driver = NULL;
            ibm->flags.acpi_driver_registered = 0;
      }

      if (ibm->flags.init_called && ibm->exit) {
            ibm->exit();
            ibm->flags.init_called = 0;
      }

      dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
}

/* Probing */

static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
{
      const struct dmi_device *dev = NULL;
      char ec_fw_string[18];

      if (!tp)
            return;

      memset(tp, 0, sizeof(*tp));

      if (dmi_name_in_vendors("IBM"))
            tp->vendor = PCI_VENDOR_ID_IBM;
      else if (dmi_name_in_vendors("LENOVO"))
            tp->vendor = PCI_VENDOR_ID_LENOVO;
      else
            return;

      tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
                              GFP_KERNEL);
      if (!tp->bios_version_str)
            return;
      tp->bios_model = tp->bios_version_str[0]
                   | (tp->bios_version_str[1] << 8);

      /*
       * ThinkPad T23 or newer, A31 or newer, R50e or newer,
       * X32 or newer, all Z series;  Some models must have an
       * up-to-date BIOS or they will not be detected.
       *
       * See http://thinkwiki.org/wiki/List_of_DMI_IDs
       */
      while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
            if (sscanf(dev->name,
                     "IBM ThinkPad Embedded Controller -[%17c",
                     ec_fw_string) == 1) {
                  ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
                  ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;

                  tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
                  tp->ec_model = ec_fw_string[0]
                              | (ec_fw_string[1] << 8);
                  break;
            }
      }

      tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
                              GFP_KERNEL);
      if (strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
            kfree(tp->model_str);
            tp->model_str = NULL;
      }
}

static int __init probe_for_thinkpad(void)
{
      int is_thinkpad;

      if (acpi_disabled)
            return -ENODEV;

      /*
       * Non-ancient models have better DMI tagging, but very old models
       * don't.
       */
      is_thinkpad = (thinkpad_id.model_str != NULL);

      /* ec is required because many other handles are relative to it */
      IBM_ACPIHANDLE_INIT(ec);
      if (!ec_handle) {
            if (is_thinkpad)
                  printk(IBM_ERR
                        "Not yet supported ThinkPad detected!\n");
            return -ENODEV;
      }

      /*
       * Risks a regression on very old machines, but reduces potential
       * false positives a damn great deal
       */
      if (!is_thinkpad)
            is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);

      if (!is_thinkpad && !force_load)
            return -ENODEV;

      return 0;
}


/* Module init, exit, parameters */

static struct ibm_init_struct ibms_init[] __initdata = {
      {
            .init = thinkpad_acpi_driver_init,
            .data = &thinkpad_acpi_driver_data,
      },
      {
            .init = hotkey_init,
            .data = &hotkey_driver_data,
      },
      {
            .init = bluetooth_init,
            .data = &bluetooth_driver_data,
      },
      {
            .init = wan_init,
            .data = &wan_driver_data,
      },
      {
            .init = video_init,
            .data = &video_driver_data,
      },
      {
            .init = light_init,
            .data = &light_driver_data,
      },
#ifdef CONFIG_THINKPAD_ACPI_DOCK
      {
            .init = dock_init,
            .data = &dock_driver_data[0],
      },
      {
            .init = dock_init2,
            .data = &dock_driver_data[1],
      },
#endif
#ifdef CONFIG_THINKPAD_ACPI_BAY
      {
            .init = bay_init,
            .data = &bay_driver_data,
      },
#endif
      {
            .init = cmos_init,
            .data = &cmos_driver_data,
      },
      {
            .init = led_init,
            .data = &led_driver_data,
      },
      {
            .init = beep_init,
            .data = &beep_driver_data,
      },
      {
            .init = thermal_init,
            .data = &thermal_driver_data,
      },
      {
            .data = &ecdump_driver_data,
      },
      {
            .init = brightness_init,
            .data = &brightness_driver_data,
      },
      {
            .data = &volume_driver_data,
      },
      {
            .init = fan_init,
            .data = &fan_driver_data,
      },
};

static int __init set_ibm_param(const char *val, struct kernel_param *kp)
{
      unsigned int i;
      struct ibm_struct *ibm;

      if (!kp || !kp->name || !val)
            return -EINVAL;

      for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
            ibm = ibms_init[i].data;
            WARN_ON(ibm == NULL);

            if (!ibm || !ibm->name)
                  continue;

            if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
                  if (strlen(val) > sizeof(ibms_init[i].param) - 2)
                        return -ENOSPC;
                  strcpy(ibms_init[i].param, val);
                  strcat(ibms_init[i].param, ",");
                  return 0;
            }
      }

      return -EINVAL;
}

static int experimental;
module_param(experimental, int, 0);

static u32 dbg_level;
module_param_named(debug, dbg_level, uint, 0);

static int force_load;
module_param(force_load, bool, 0);

static int fan_control_allowed;
module_param_named(fan_control, fan_control_allowed, bool, 0);

static int brightness_mode;
module_param_named(brightness_mode, brightness_mode, int, 0);

static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
module_param(brightness_enable, uint, 0);

static unsigned int hotkey_report_mode;
module_param(hotkey_report_mode, uint, 0);

#define IBM_PARAM(feature) \
      module_param_call(feature, set_ibm_param, NULL, NULL, 0)

IBM_PARAM(hotkey);
IBM_PARAM(bluetooth);
IBM_PARAM(video);
IBM_PARAM(light);
#ifdef CONFIG_THINKPAD_ACPI_DOCK
IBM_PARAM(dock);
#endif
#ifdef CONFIG_THINKPAD_ACPI_BAY
IBM_PARAM(bay);
#endif /* CONFIG_THINKPAD_ACPI_BAY */
IBM_PARAM(cmos);
IBM_PARAM(led);
IBM_PARAM(beep);
IBM_PARAM(ecdump);
IBM_PARAM(brightness);
IBM_PARAM(volume);
IBM_PARAM(fan);

static int __init thinkpad_acpi_module_init(void)
{
      int ret, i;

      tpacpi_lifecycle = TPACPI_LIFE_INIT;

      /* Parameter checking */
      if (hotkey_report_mode > 2)
            return -EINVAL;

      /* Driver-level probe */

      get_thinkpad_model_data(&thinkpad_id);
      ret = probe_for_thinkpad();
      if (ret) {
            thinkpad_acpi_module_exit();
            return ret;
      }

      /* Driver initialization */

      IBM_ACPIHANDLE_INIT(ecrd);
      IBM_ACPIHANDLE_INIT(ecwr);

      proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
      if (!proc_dir) {
            printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
            thinkpad_acpi_module_exit();
            return -ENODEV;
      }
      proc_dir->owner = THIS_MODULE;

      ret = platform_driver_register(&tpacpi_pdriver);
      if (ret) {
            printk(IBM_ERR "unable to register main platform driver\n");
            thinkpad_acpi_module_exit();
            return ret;
      }
      tp_features.platform_drv_registered = 1;

      ret = platform_driver_register(&tpacpi_hwmon_pdriver);
      if (ret) {
            printk(IBM_ERR "unable to register hwmon platform driver\n");
            thinkpad_acpi_module_exit();
            return ret;
      }
      tp_features.sensors_pdrv_registered = 1;

      ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
      if (!ret) {
            tp_features.platform_drv_attrs_registered = 1;
            ret = tpacpi_create_driver_attributes(&tpacpi_hwmon_pdriver.driver);
      }
      if (ret) {
            printk(IBM_ERR "unable to create sysfs driver attributes\n");
            thinkpad_acpi_module_exit();
            return ret;
      }
      tp_features.sensors_pdrv_attrs_registered = 1;


      /* Device initialization */
      tpacpi_pdev = platform_device_register_simple(IBM_DRVR_NAME, -1,
                                          NULL, 0);
      if (IS_ERR(tpacpi_pdev)) {
            ret = PTR_ERR(tpacpi_pdev);
            tpacpi_pdev = NULL;
            printk(IBM_ERR "unable to register platform device\n");
            thinkpad_acpi_module_exit();
            return ret;
      }
      tpacpi_sensors_pdev = platform_device_register_simple(
                                          IBM_HWMON_DRVR_NAME,
                                          -1, NULL, 0);
      if (IS_ERR(tpacpi_sensors_pdev)) {
            ret = PTR_ERR(tpacpi_sensors_pdev);
            tpacpi_sensors_pdev = NULL;
            printk(IBM_ERR "unable to register hwmon platform device\n");
            thinkpad_acpi_module_exit();
            return ret;
      }
      ret = device_create_file(&tpacpi_sensors_pdev->dev,
                         &dev_attr_thinkpad_acpi_pdev_name);
      if (ret) {
            printk(IBM_ERR
                  "unable to create sysfs hwmon device attributes\n");
            thinkpad_acpi_module_exit();
            return ret;
      }
      tp_features.sensors_pdev_attrs_registered = 1;
      tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
      if (IS_ERR(tpacpi_hwmon)) {
            ret = PTR_ERR(tpacpi_hwmon);
            tpacpi_hwmon = NULL;
            printk(IBM_ERR "unable to register hwmon device\n");
            thinkpad_acpi_module_exit();
            return ret;
      }
      mutex_init(&tpacpi_inputdev_send_mutex);
      tpacpi_inputdev = input_allocate_device();
      if (!tpacpi_inputdev) {
            printk(IBM_ERR "unable to allocate input device\n");
            thinkpad_acpi_module_exit();
            return -ENOMEM;
      } else {
            /* Prepare input device, but don't register */
            tpacpi_inputdev->name = "ThinkPad Extra Buttons";
            tpacpi_inputdev->phys = IBM_DRVR_NAME "/input0";
            tpacpi_inputdev->id.bustype = BUS_HOST;
            tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
                                    thinkpad_id.vendor :
                                    PCI_VENDOR_ID_IBM;
            tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
            tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
      }
      for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
            ret = ibm_init(&ibms_init[i]);
            if (ret >= 0 && *ibms_init[i].param)
                  ret = ibms_init[i].data->write(ibms_init[i].param);
            if (ret < 0) {
                  thinkpad_acpi_module_exit();
                  return ret;
            }
      }
      ret = input_register_device(tpacpi_inputdev);
      if (ret < 0) {
            printk(IBM_ERR "unable to register input device\n");
            thinkpad_acpi_module_exit();
            return ret;
      } else {
            tp_features.input_device_registered = 1;
      }

      tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
      return 0;
}

static void thinkpad_acpi_module_exit(void)
{
      struct ibm_struct *ibm, *itmp;

      tpacpi_lifecycle = TPACPI_LIFE_EXITING;

      list_for_each_entry_safe_reverse(ibm, itmp,
                               &tpacpi_all_drivers,
                               all_drivers) {
            ibm_exit(ibm);
      }

      dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");

      if (tpacpi_inputdev) {
            if (tp_features.input_device_registered)
                  input_unregister_device(tpacpi_inputdev);
            else
                  input_free_device(tpacpi_inputdev);
      }

      if (tpacpi_hwmon)
            hwmon_device_unregister(tpacpi_hwmon);

      if (tp_features.sensors_pdev_attrs_registered)
            device_remove_file(&tpacpi_sensors_pdev->dev,
                           &dev_attr_thinkpad_acpi_pdev_name);
      if (tpacpi_sensors_pdev)
            platform_device_unregister(tpacpi_sensors_pdev);
      if (tpacpi_pdev)
            platform_device_unregister(tpacpi_pdev);

      if (tp_features.sensors_pdrv_attrs_registered)
            tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
      if (tp_features.platform_drv_attrs_registered)
            tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);

      if (tp_features.sensors_pdrv_registered)
            platform_driver_unregister(&tpacpi_hwmon_pdriver);

      if (tp_features.platform_drv_registered)
            platform_driver_unregister(&tpacpi_pdriver);

      if (proc_dir)
            remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);

      kfree(thinkpad_id.bios_version_str);
      kfree(thinkpad_id.ec_version_str);
      kfree(thinkpad_id.model_str);
}

module_init(thinkpad_acpi_module_init);
module_exit(thinkpad_acpi_module_exit);

Generated by  Doxygen 1.6.0   Back to index