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kernel / pub / scm / linux / kernel / git / hyperv / linux / refs/tags/v2.6.28-rc5 / . / drivers / misc / thinkpad_acpi.c
blob: 7a4a26b0edd2219dd28c3f4fb3475cd074ab81bd [file] [log] [blame]
/*
* thinkpad_acpi.c - ThinkPad ACPI Extras
*
*
* Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
* Copyright (C) 2006-2008 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 TPACPI_VERSION "0.21"
#define TPACPI_SYSFS_VERSION 0x020200
/*
* Changelog:
* 2007-10-20 changelog trimmed down
*
* 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.
*
* 2005-03-17 0.11 support for 600e, 770x
* thanks to Jamie Lentin <lentinj@dial.pipex.com>
*
* 2005-01-16 0.9 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>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/kthread.h>
#include <linux/freezer.h>
#include <linux/delay.h>
#include <linux/nvram.h>
#include <linux/proc_fs.h>
#include <linux/sysfs.h>
#include <linux/backlight.h>
#include <linux/fb.h>
#include <linux/platform_device.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/input.h>
#include <linux/leds.h>
#include <linux/rfkill.h>
#include <asm/uaccess.h>
#include <linux/dmi.h>
#include <linux/jiffies.h>
#include <linux/workqueue.h>
#include <acpi/acpi_drivers.h>
#include <acpi/acnamesp.h>
#include <linux/pci_ids.h>
/* ThinkPad CMOS commands */
#define TP_CMOS_VOLUME_DOWN 0
#define TP_CMOS_VOLUME_UP 1
#define TP_CMOS_VOLUME_MUTE 2
#define TP_CMOS_BRIGHTNESS_UP 4
#define TP_CMOS_BRIGHTNESS_DOWN 5
#define TP_CMOS_THINKLIGHT_ON 12
#define TP_CMOS_THINKLIGHT_OFF 13
/* NVRAM Addresses */
enum tp_nvram_addr {
TP_NVRAM_ADDR_HK2 = 0x57,
TP_NVRAM_ADDR_THINKLIGHT = 0x58,
TP_NVRAM_ADDR_VIDEO = 0x59,
TP_NVRAM_ADDR_BRIGHTNESS = 0x5e,
TP_NVRAM_ADDR_MIXER = 0x60,
};
/* NVRAM bit masks */
enum {
TP_NVRAM_MASK_HKT_THINKPAD = 0x08,
TP_NVRAM_MASK_HKT_ZOOM = 0x20,
TP_NVRAM_MASK_HKT_DISPLAY = 0x40,
TP_NVRAM_MASK_HKT_HIBERNATE = 0x80,
TP_NVRAM_MASK_THINKLIGHT = 0x10,
TP_NVRAM_MASK_HKT_DISPEXPND = 0x30,
TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20,
TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f,
TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0,
TP_NVRAM_MASK_MUTE = 0x40,
TP_NVRAM_MASK_HKT_VOLUME = 0x80,
TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f,
TP_NVRAM_POS_LEVEL_VOLUME = 0,
};
/* ACPI HIDs */
#define TPACPI_ACPI_HKEY_HID "IBM0068"
/* Input IDs */
#define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */
#define TPACPI_HKEY_INPUT_VERSION 0x4101
/****************************************************************************
* Main driver
*/
#define TPACPI_NAME "thinkpad"
#define TPACPI_DESC "ThinkPad ACPI Extras"
#define TPACPI_FILE TPACPI_NAME "_acpi"
#define TPACPI_URL "http://ibm-acpi.sf.net/"
#define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
#define TPACPI_PROC_DIR "ibm"
#define TPACPI_ACPI_EVENT_PREFIX "ibm"
#define TPACPI_DRVR_NAME TPACPI_FILE
#define TPACPI_DRVR_SHORTNAME "tpacpi"
#define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
#define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
#define TPACPI_WORKQUEUE_NAME "ktpacpid"
#define TPACPI_MAX_ACPI_ARGS 3
/* rfkill switches */
enum {
TPACPI_RFK_BLUETOOTH_SW_ID = 0,
TPACPI_RFK_WWAN_SW_ID,
};
/* Debugging */
#define TPACPI_LOG TPACPI_FILE ": "
#define TPACPI_ERR KERN_ERR TPACPI_LOG
#define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
#define TPACPI_INFO KERN_INFO TPACPI_LOG
#define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG
#define TPACPI_DBG_ALL 0xffff
#define TPACPI_DBG_INIT 0x0001
#define TPACPI_DBG_EXIT 0x0002
#define dbg_printk(a_dbg_level, format, arg...) \
do { if (dbg_level & a_dbg_level) \
printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
} while (0)
#ifdef CONFIG_THINKPAD_ACPI_DEBUG
#define vdbg_printk(a_dbg_level, format, arg...) \
dbg_printk(a_dbg_level, format, ## arg)
static const char *str_supported(int is_supported);
#else
#define vdbg_printk(a_dbg_level, format, arg...)
#endif
#define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
#define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
#define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
/****************************************************************************
* Driver-wide structs and misc. variables
*/
struct ibm_struct;
struct tp_acpi_drv_struct {
const struct acpi_device_id *hid;
struct acpi_driver *driver;
void (*notify) (struct ibm_struct *, u32);
acpi_handle *handle;
u32 type;
struct acpi_device *device;
};
struct ibm_struct {
char *name;
int (*read) (char *);
int (*write) (char *);
void (*exit) (void);
void (*resume) (void);
void (*suspend) (pm_message_t state);
struct list_head all_drivers;
struct tp_acpi_drv_struct *acpi;
struct {
u8 acpi_driver_registered:1;
u8 acpi_notify_installed:1;
u8 proc_created:1;
u8 init_called:1;
u8 experimental:1;
} flags;
};
struct ibm_init_struct {
char param[32];
int (*init) (struct ibm_init_struct *);
struct ibm_struct *data;
};
static struct {
#ifdef CONFIG_THINKPAD_ACPI_BAY
u32 bay_status:1;
u32 bay_eject:1;
u32 bay_status2:1;
u32 bay_eject2:1;
#endif
u32 bluetooth:1;
u32 hotkey:1;
u32 hotkey_mask:1;
u32 hotkey_wlsw:1;
u32 hotkey_tablet:1;
u32 light:1;
u32 light_status:1;
u32 bright_16levels:1;
u32 bright_acpimode:1;
u32 wan:1;
u32 fan_ctrl_status_undef:1;
u32 input_device_registered:1;
u32 platform_drv_registered:1;
u32 platform_drv_attrs_registered:1;
u32 sensors_pdrv_registered:1;
u32 sensors_pdrv_attrs_registered:1;
u32 sensors_pdev_attrs_registered:1;
u32 hotkey_poll_active:1;
} tp_features;
static struct {
u16 hotkey_mask_ff:1;
u16 bright_cmos_ec_unsync:1;
} tp_warned;
struct thinkpad_id_data {
unsigned int vendor; /* ThinkPad vendor:
* PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
char *ec_version_str; /* Something like 1ZHT51WW-1.04a */
u16 bios_model; /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
u16 ec_model;
char *model_str; /* ThinkPad T43 */
char *nummodel_str; /* 9384A9C for a 9384-A9C model */
};
static struct thinkpad_id_data thinkpad_id;
static enum {
TPACPI_LIFE_INIT = 0,
TPACPI_LIFE_RUNNING,
TPACPI_LIFE_EXITING,
} tpacpi_lifecycle;
static int experimental;
static u32 dbg_level;
static struct workqueue_struct *tpacpi_wq;
/* Special LED class that can defer work */
struct tpacpi_led_classdev {
struct led_classdev led_classdev;
struct work_struct work;
enum led_brightness new_brightness;
unsigned int led;
};
/****************************************************************************
****************************************************************************
*
* ACPI Helpers and device model
*
****************************************************************************
****************************************************************************/
/*************************************************************************
* ACPI basic handles
*/
static acpi_handle root_handle;
#define TPACPI_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 }
TPACPI_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 */
);
TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */
TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */
TPACPI_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 */
TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */
"^HKEY", /* R30, R31 */
"HKEY", /* all others */
); /* 570 */
TPACPI_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 */
/*************************************************************************
* 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[TPACPI_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(TPACPI_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(TPACPI_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(TPACPI_ERR "acpi_evalf() called "
"with invalid format character '%c'\n", res_type);
return 0;
}
if (!success && !quiet)
printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
method, fmt0, status);
return success;
}
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;
}
#if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
static int _sta(acpi_handle handle)
{
int status;
if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
status = 0;
return status;
}
#endif
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
*/
#define TPACPI_ACPIHANDLE_INIT(object) \
drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
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(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
ibm->name, rc);
return -ENODEV;
}
ibm->acpi->device->driver_data = ibm;
sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
TPACPI_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(TPACPI_NOTICE
"another device driver is already "
"handling %s events\n", ibm->name);
} else {
printk(TPACPI_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(TPACPI_ERR
"failed to allocate memory for ibm->acpi->driver\n");
return -ENOMEM;
}
sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_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(TPACPI_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 LIST_HEAD(tpacpi_all_drivers);
static int tpacpi_suspend_handler(struct platform_device *pdev,
pm_message_t state)
{
struct ibm_struct *ibm, *itmp;
list_for_each_entry_safe(ibm, itmp,
&tpacpi_all_drivers,
all_drivers) {
if (ibm->suspend)
(ibm->suspend)(state);
}
return 0;
}
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 = TPACPI_DRVR_NAME,
.owner = THIS_MODULE,
},
.suspend = tpacpi_suspend_handler,
.resume = tpacpi_resume_handler,
};
static struct platform_driver tpacpi_hwmon_pdriver = {
.driver = {
.name = TPACPI_HWMON_DRVR_NAME,
.owner = THIS_MODULE,
},
};
/*************************************************************************
* sysfs support helpers
*/
struct attribute_set {
unsigned int members, max_members;
struct attribute_group group;
};
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;
}
#define destroy_attr_set(_set) \
kfree(_set);
/* 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);
}
#define register_attr_set_with_sysfs(_attr_set, _kobj) \
sysfs_create_group(_kobj, &_attr_set->group)
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;
}
static void tpacpi_disable_brightness_delay(void)
{
if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
printk(TPACPI_NOTICE
"ACPI backlight control delay disabled\n");
}
static int __init tpacpi_query_bcl_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(TPACPI_ERR "Unknown _BCL data, "
"please report this to %s\n", TPACPI_MAIL);
rc = 0;
} else {
rc = obj->package.count;
}
} else {
return 0;
}
kfree(buffer.pointer);
return rc;
}
static acpi_status __init tpacpi_acpi_walk_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)) {
BUG_ON(!rv || !*rv);
**(int **)rv = tpacpi_query_bcl_levels(handle);
return AE_CTRL_TERMINATE;
} else {
return AE_OK;
}
}
/*
* Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
*/
static int __init tpacpi_check_std_acpi_brightness_support(void)
{
int status;
int bcl_levels = 0;
void *bcl_ptr = &bcl_levels;
if (!vid_handle) {
TPACPI_ACPIHANDLE_INIT(vid);
}
if (!vid_handle)
return 0;
/*
* Search for a _BCL method, and execute it. This is safe on all
* ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
* BIOS in ACPI backlight control mode. We do NOT have to care
* about calling the _BCL method in an enabled video device, any
* will do for our purposes.
*/
status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
tpacpi_acpi_walk_find_bcl, NULL,
&bcl_ptr);
if (ACPI_SUCCESS(status) && bcl_levels > 2) {
tp_features.bright_acpimode = 1;
return (bcl_levels - 2);
}
return 0;
}
static int __init tpacpi_new_rfkill(const unsigned int id,
struct rfkill **rfk,
const enum rfkill_type rfktype,
const char *name,
int (*toggle_radio)(void *, enum rfkill_state),
int (*get_state)(void *, enum rfkill_state *))
{
int res;
enum rfkill_state initial_state;
*rfk = rfkill_allocate(&tpacpi_pdev->dev, rfktype);
if (!*rfk) {
printk(TPACPI_ERR
"failed to allocate memory for rfkill class\n");
return -ENOMEM;
}
(*rfk)->name = name;
(*rfk)->get_state = get_state;
(*rfk)->toggle_radio = toggle_radio;
if (!get_state(NULL, &initial_state))
(*rfk)->state = initial_state;
res = rfkill_register(*rfk);
if (res < 0) {
printk(TPACPI_ERR
"failed to register %s rfkill switch: %d\n",
name, res);
rfkill_free(*rfk);
*rfk = NULL;
return res;
}
return 0;
}
/*************************************************************************
* 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",
TPACPI_DESC, TPACPI_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]);
}
/****************************************************************************
****************************************************************************
*
* Subdrivers
*
****************************************************************************
****************************************************************************/
/*************************************************************************
* thinkpad-acpi init subdriver
*/
static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
{
printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
printk(TPACPI_INFO "%s\n", TPACPI_URL);
printk(TPACPI_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(TPACPI_INFO "%s %s, model %s\n",
(thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
"IBM" : ((thinkpad_id.vendor ==
PCI_VENDOR_ID_LENOVO) ?
"Lenovo" : "Unknown vendor"),
thinkpad_id.model_str,
(thinkpad_id.nummodel_str) ?
thinkpad_id.nummodel_str : "unknown");
return 0;
}
static int thinkpad_acpi_driver_read(char *p)
{
int len = 0;
len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
return len;
}
static struct ibm_struct thinkpad_acpi_driver_data = {
.name = "driver",
.read = thinkpad_acpi_driver_read,
};
/*************************************************************************
* Hotkey subdriver
*/
enum { /* hot key scan codes (derived from ACPI DSDT) */
TP_ACPI_HOTKEYSCAN_FNF1 = 0,
TP_ACPI_HOTKEYSCAN_FNF2,
TP_ACPI_HOTKEYSCAN_FNF3,
TP_ACPI_HOTKEYSCAN_FNF4,
TP_ACPI_HOTKEYSCAN_FNF5,
TP_ACPI_HOTKEYSCAN_FNF6,
TP_ACPI_HOTKEYSCAN_FNF7,
TP_ACPI_HOTKEYSCAN_FNF8,
TP_ACPI_HOTKEYSCAN_FNF9,
TP_ACPI_HOTKEYSCAN_FNF10,
TP_ACPI_HOTKEYSCAN_FNF11,
TP_ACPI_HOTKEYSCAN_FNF12,
TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
TP_ACPI_HOTKEYSCAN_FNINSERT,
TP_ACPI_HOTKEYSCAN_FNDELETE,
TP_ACPI_HOTKEYSCAN_FNHOME,
TP_ACPI_HOTKEYSCAN_FNEND,
TP_ACPI_HOTKEYSCAN_FNPAGEUP,
TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
TP_ACPI_HOTKEYSCAN_FNSPACE,
TP_ACPI_HOTKEYSCAN_VOLUMEUP,
TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
TP_ACPI_HOTKEYSCAN_MUTE,
TP_ACPI_HOTKEYSCAN_THINKPAD,
};
enum { /* Keys available through NVRAM polling */
TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U,
};
enum { /* Positions of some of the keys in hotkey masks */
TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
};
enum { /* NVRAM to ACPI HKEY group map */
TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK |
TP_ACPI_HKEY_ZOOM_MASK |
TP_ACPI_HKEY_DISPSWTCH_MASK |
TP_ACPI_HKEY_HIBERNATE_MASK,
TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK |
TP_ACPI_HKEY_BRGHTDWN_MASK,
TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK |
TP_ACPI_HKEY_VOLDWN_MASK |
TP_ACPI_HKEY_MUTE_MASK,
};
#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
struct tp_nvram_state {
u16 thinkpad_toggle:1;
u16 zoom_toggle:1;
u16 display_toggle:1;
u16 thinklight_toggle:1;
u16 hibernate_toggle:1;
u16 displayexp_toggle:1;
u16 display_state:1;
u16 brightness_toggle:1;
u16 volume_toggle:1;
u16 mute:1;
u8 brightness_level;
u8 volume_level;
};
static struct task_struct *tpacpi_hotkey_task;
static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */
static int hotkey_poll_freq = 10; /* Hz */
static struct mutex hotkey_thread_mutex;
static struct mutex hotkey_thread_data_mutex;
static unsigned int hotkey_config_change;
#else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
#define hotkey_source_mask 0U
#endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
static struct mutex hotkey_mutex;
static enum { /* Reasons for waking up */
TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */
TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */
TP_ACPI_WAKEUP_UNDOCK, /* Undock request */
} hotkey_wakeup_reason;
static int hotkey_autosleep_ack;
static int hotkey_orig_status;
static u32 hotkey_orig_mask;
static u32 hotkey_all_mask;
static u32 hotkey_reserved_mask;
static u32 hotkey_mask;
static unsigned int hotkey_report_mode;
static u16 *hotkey_keycode_map;
static struct attribute_set *hotkey_dev_attributes;
#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
#define HOTKEY_CONFIG_CRITICAL_START \
do { \
mutex_lock(&hotkey_thread_data_mutex); \
hotkey_config_change++; \
} while (0);
#define HOTKEY_CONFIG_CRITICAL_END \
mutex_unlock(&hotkey_thread_data_mutex);
#else
#define HOTKEY_CONFIG_CRITICAL_START
#define HOTKEY_CONFIG_CRITICAL_END
#endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
/* HKEY.MHKG() return bits */
#define TP_HOTKEY_TABLET_MASK (1 << 3)
static int hotkey_get_wlsw(int *status)
{
if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
return -EIO;
return 0;
}
static int hotkey_get_tablet_mode(int *status)
{
int s;
if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
return -EIO;
*status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
return 0;
}
/*
* Call with hotkey_mutex held
*/
static int hotkey_mask_get(void)
{
u32 m = 0;
if (tp_features.hotkey_mask) {
if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
return -EIO;
}
hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
return 0;
}
/*
* Call with hotkey_mutex held
*/
static int hotkey_mask_set(u32 mask)
{
int i;
int rc = 0;
if (tp_features.hotkey_mask) {
if (!tp_warned.hotkey_mask_ff &&
(mask == 0xffff || mask == 0xffffff ||
mask == 0xffffffff)) {
tp_warned.hotkey_mask_ff = 1;
printk(TPACPI_NOTICE
"setting the hotkey mask to 0x%08x is likely "
"not the best way to go about it\n", mask);
printk(TPACPI_NOTICE
"please consider using the driver defaults, "
"and refer to up-to-date thinkpad-acpi "
"documentation\n");
}
HOTKEY_CONFIG_CRITICAL_START
for (i = 0; i < 32; i++) {
u32 m = 1 << i;
/* enable in firmware mask only keys not in NVRAM
* mode, but enable the key in the cached hotkey_mask
* regardless of mode, or the key will end up
* disabled by hotkey_mask_get() */
if (!acpi_evalf(hkey_handle,
NULL, "MHKM", "vdd", i + 1,
!!((mask & ~hotkey_source_mask) & m))) {
rc = -EIO;
break;
} else {
hotkey_mask = (hotkey_mask & ~m) | (mask & m);
}
}
HOTKEY_CONFIG_CRITICAL_END
/* hotkey_mask_get must be called unconditionally below */
if (!hotkey_mask_get() && !rc &&
(hotkey_mask & ~hotkey_source_mask) !=
(mask & ~hotkey_source_mask)) {
printk(TPACPI_NOTICE
"requested hot key mask 0x%08x, but "
"firmware forced it to 0x%08x\n",
mask, hotkey_mask);
}
} else {
#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
HOTKEY_CONFIG_CRITICAL_START
hotkey_mask = mask & hotkey_source_mask;
HOTKEY_CONFIG_CRITICAL_END
hotkey_mask_get();
if (hotkey_mask != mask) {
printk(TPACPI_NOTICE
"requested hot key mask 0x%08x, "
"forced to 0x%08x (NVRAM poll mask is "
"0x%08x): no firmware mask support\n",
mask, hotkey_mask, hotkey_source_mask);
}
#else
hotkey_mask_get();
rc = -ENXIO;
#endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
}
return rc;
}
static int hotkey_status_get(int *status)
{
if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
return -EIO;
return 0;
}
static int hotkey_status_set(int status)
{
if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
return -EIO;
return 0;
}
static void tpacpi_input_send_tabletsw(void)
{
int state;
if (tp_features.hotkey_tablet &&
!hotkey_get_tablet_mode(&state)) {
mutex_lock(&tpacpi_inputdev_send_mutex);
input_report_switch(tpacpi_inputdev,
SW_TABLET_MODE, !!state);
input_sync(tpacpi_inputdev);
mutex_unlock(&tpacpi_inputdev_send_mutex);
}
}
static void tpacpi_input_send_key(unsigned int scancode)
{
unsigned int keycode;
keycode = hotkey_keycode_map[scancode];
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);
}
}
#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
static void tpacpi_hotkey_send_key(unsigned int scancode)
{
tpacpi_input_send_key(scancode);
if (hotkey_report_mode < 2) {
acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
0x80, 0x1001 + scancode);
}
}
static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
{
u8 d;
if (m & TP_NVRAM_HKEY_GROUP_HK2) {
d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
}
if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
}
if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
n->displayexp_toggle =
!!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
}
if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
>> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
n->brightness_toggle =
!!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
}
if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
>> TP_NVRAM_POS_LEVEL_VOLUME;
n->mute = !!(d & TP_NVRAM_MASK_MUTE);
n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
}
}
#define TPACPI_COMPARE_KEY(__scancode, __member) \
do { \
if ((mask & (1 << __scancode)) && \
oldn->__member != newn->__member) \
tpacpi_hotkey_send_key(__scancode); \
} while (0)
#define TPACPI_MAY_SEND_KEY(__scancode) \
do { if (mask & (1 << __scancode)) \
tpacpi_hotkey_send_key(__scancode); } while (0)
static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
struct tp_nvram_state *newn,
u32 mask)
{
TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
/* handle volume */
if (oldn->volume_toggle != newn->volume_toggle) {
if (oldn->mute != newn->mute) {
TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
}
if (oldn->volume_level > newn->volume_level) {
TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
} else if (oldn->volume_level < newn->volume_level) {
TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
} else if (oldn->mute == newn->mute) {
/* repeated key presses that didn't change state */
if (newn->mute) {
TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
} else if (newn->volume_level != 0) {
TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
} else {
TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
}
}
}
/* handle brightness */
if (oldn->brightness_toggle != newn->brightness_toggle) {
if (oldn->brightness_level < newn->brightness_level) {
TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
} else if (oldn->brightness_level > newn->brightness_level) {
TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
} else {
/* repeated key presses that didn't change state */
if (newn->brightness_level != 0) {
TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
} else {
TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
}
}
}
}
#undef TPACPI_COMPARE_KEY
#undef TPACPI_MAY_SEND_KEY
static int hotkey_kthread(void *data)
{
struct tp_nvram_state s[2];
u32 mask;
unsigned int si, so;
unsigned long t;
unsigned int change_detector, must_reset;
mutex_lock(&hotkey_thread_mutex);
if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
goto exit;
set_freezable();
so = 0;
si = 1;
t = 0;
/* Initial state for compares */
mutex_lock(&hotkey_thread_data_mutex);
change_detector = hotkey_config_change;
mask = hotkey_source_mask & hotkey_mask;
mutex_unlock(&hotkey_thread_data_mutex);
hotkey_read_nvram(&s[so], mask);
while (!kthread_should_stop() && hotkey_poll_freq) {
if (t == 0)
t = 1000/hotkey_poll_freq;
t = msleep_interruptible(t);
if (unlikely(kthread_should_stop()))
break;
must_reset = try_to_freeze();
if (t > 0 && !must_reset)
continue;
mutex_lock(&hotkey_thread_data_mutex);
if (must_reset || hotkey_config_change != change_detector) {
/* forget old state on thaw or config change */
si = so;
t = 0;
change_detector = hotkey_config_change;
}
mask = hotkey_source_mask & hotkey_mask;
mutex_unlock(&hotkey_thread_data_mutex);
if (likely(mask)) {
hotkey_read_nvram(&s[si], mask);
if (likely(si != so)) {
hotkey_compare_and_issue_event(&s[so], &s[si],
mask);
}
}
so = si;
si ^= 1;
}
exit:
mutex_unlock(&hotkey_thread_mutex);
return 0;
}
static void hotkey_poll_stop_sync(void)
{
if (tpacpi_hotkey_task) {
if (frozen(tpacpi_hotkey_task) ||
freezing(tpacpi_hotkey_task))
thaw_process(tpacpi_hotkey_task);
kthread_stop(tpacpi_hotkey_task);
tpacpi_hotkey_task = NULL;
mutex_lock(&hotkey_thread_mutex);
/* at this point, the thread did exit */
mutex_unlock(&hotkey_thread_mutex);
}
}
/* call with hotkey_mutex held */
static void hotkey_poll_setup(int may_warn)
{
if ((hotkey_source_mask & hotkey_mask) != 0 &&
hotkey_poll_freq > 0 &&
(tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
if (!tpacpi_hotkey_task) {
tpacpi_hotkey_task = kthread_run(hotkey_kthread,
NULL, TPACPI_NVRAM_KTHREAD_NAME);
if (IS_ERR(tpacpi_hotkey_task)) {
tpacpi_hotkey_task = NULL;
printk(TPACPI_ERR
"could not create kernel thread "
"for hotkey polling\n");
}
}
} else {
hotkey_poll_stop_sync();
if (may_warn &&
hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
printk(TPACPI_NOTICE
"hot keys 0x%08x require polling, "
"which is currently disabled\n",
hotkey_source_mask);
}
}
}
static void hotkey_poll_setup_safe(int may_warn)
{
mutex_lock(&hotkey_mutex);
hotkey_poll_setup(may_warn);
mutex_unlock(&hotkey_mutex);
}
#else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
static void hotkey_poll_setup_safe(int __unused)
{
}
#endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
static int hotkey_inputdev_open(struct input_dev *dev)
{
switch (tpacpi_lifecycle) {
case TPACPI_LIFE_INIT:
/*
* hotkey_init will call hotkey_poll_setup_safe
* at the appropriate moment
*/
return 0;
case TPACPI_LIFE_EXITING:
return -EBUSY;
case TPACPI_LIFE_RUNNING:
hotkey_poll_setup_safe(0);
return 0;
}
/* Should only happen if tpacpi_lifecycle is corrupt */
BUG();
return -EBUSY;
}
static void hotkey_inputdev_close(struct input_dev *dev)
{
/* disable hotkey polling when possible */
if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
hotkey_poll_setup_safe(0);
}
/* sysfs hotkey enable ------------------------------------------------- */
static ssize_t hotkey_enable_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int res, status;
res = hotkey_status_get(&status);
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;
if (parse_strtoul(buf, 1, &t))
return -EINVAL;
res = hotkey_status_set(t);
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;
if (mutex_lock_interruptible(&hotkey_mutex))
return -ERESTARTSYS;
res = hotkey_mask_get();
mutex_unlock(&hotkey_mutex);
return (res)?
res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_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;
if (parse_strtoul(buf, 0xffffffffUL, &t))
return -EINVAL;
if (mutex_lock_interruptible(&hotkey_mutex))
return -ERESTARTSYS;
res = hotkey_mask_set(t);
#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
hotkey_poll_setup(1);
#endif
mutex_unlock(&hotkey_mutex);
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 | hotkey_source_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_source_mask)
& ~hotkey_reserved_mask);
}
static struct device_attribute dev_attr_hotkey_recommended_mask =
__ATTR(hotkey_recommended_mask, S_IRUGO,
hotkey_recommended_mask_show, NULL);
#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
/* sysfs hotkey hotkey_source_mask ------------------------------------- */
static ssize_t hotkey_source_mask_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
}
static ssize_t hotkey_source_mask_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
unsigned long t;
if (parse_strtoul(buf, 0xffffffffUL, &t) ||
((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
return -EINVAL;
if (mutex_lock_interruptible(&hotkey_mutex))
return -ERESTARTSYS;
HOTKEY_CONFIG_CRITICAL_START
hotkey_source_mask = t;
HOTKEY_CONFIG_CRITICAL_END
hotkey_poll_setup(1);
mutex_unlock(&hotkey_mutex);
return count;
}
static struct device_attribute dev_attr_hotkey_source_mask =
__ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
hotkey_source_mask_show, hotkey_source_mask_store);
/* sysfs hotkey hotkey_poll_freq --------------------------------------- */
static ssize_t hotkey_poll_freq_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
}
static ssize_t hotkey_poll_freq_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
unsigned long t;
if (parse_strtoul(buf, 25, &t))
return -EINVAL;
if (mutex_lock_interruptible(&hotkey_mutex))
return -ERESTARTSYS;
hotkey_poll_freq = t;
hotkey_poll_setup(1);
mutex_unlock(&hotkey_mutex);
return count;
}
static struct device_attribute dev_attr_hotkey_poll_freq =
__ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
hotkey_poll_freq_show, hotkey_poll_freq_store);
#endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
/* sysfs hotkey radio_sw (pollable) ------------------------------------ */
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);
static void hotkey_radio_sw_notify_change(void)
{
if (tp_features.hotkey_wlsw)
sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
"hotkey_radio_sw");
}
/* sysfs hotkey tablet mode (pollable) --------------------------------- */
static ssize_t hotkey_tablet_mode_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int res, s;
res = hotkey_get_tablet_mode(&s);
if (res < 0)
return res;
return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
}
static struct device_attribute dev_attr_hotkey_tablet_mode =
__ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
static void hotkey_tablet_mode_notify_change(void)
{
if (tp_features.hotkey_tablet)
sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
"hotkey_tablet_mode");
}
/* 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);
/* sysfs wakeup reason (pollable) -------------------------------------- */
static ssize_t hotkey_wakeup_reason_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
}
static struct device_attribute dev_attr_hotkey_wakeup_reason =
__ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
static void hotkey_wakeup_reason_notify_change(void)
{
if (tp_features.hotkey_mask)
sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
"wakeup_reason");
}
/* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
}
static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
__ATTR(wakeup_hotunplug_complete, S_IRUGO,
hotkey_wakeup_hotunplug_complete_show, NULL);
static void hotkey_wakeup_hotunplug_complete_notify_change(void)
{
if (tp_features.hotkey_mask)
sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
"wakeup_hotunplug_complete");
}
/* --------------------------------------------------------------------- */
static struct attribute *hotkey_attributes[] __initdata = {
&dev_attr_hotkey_enable.attr,
&dev_attr_hotkey_bios_enabled.attr,
&dev_attr_hotkey_report_mode.attr,
#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
&dev_attr_hotkey_mask.attr,
&dev_attr_hotkey_all_mask.attr,
&dev_attr_hotkey_recommended_mask.attr,
&dev_attr_hotkey_source_mask.attr,
&dev_attr_hotkey_poll_freq.attr,
#endif
};
static struct attribute *hotkey_mask_attributes[] __initdata = {
&dev_attr_hotkey_bios_mask.attr,
#ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
&dev_attr_hotkey_mask.attr,
&dev_attr_hotkey_all_mask.attr,
&dev_attr_hotkey_recommended_mask.attr,
#endif
&dev_attr_hotkey_wakeup_reason.attr,
&dev_attr_hotkey_wakeup_hotunplug_complete.attr,
};
static void bluetooth_update_rfk(void);
static void wan_update_rfk(void);
static void tpacpi_send_radiosw_update(void)
{
int wlsw;
/* Sync these BEFORE sending any rfkill events */
if (tp_features.bluetooth)
bluetooth_update_rfk();
if (tp_features.wan)
wan_update_rfk();
if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
mutex_lock(&tpacpi_inputdev_send_mutex);
input_report_switch(tpacpi_inputdev,
SW_RFKILL_ALL, !!wlsw);
input_sync(tpacpi_inputdev);
mutex_unlock(&tpacpi_inputdev_send_mutex);
}
hotkey_radio_sw_notify_change();
}
static void hotkey_exit(void)
{
#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
hotkey_poll_stop_sync();
#endif
if (hotkey_dev_attributes)
delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
kfree(hotkey_keycode_map);
if (tp_features.hotkey) {
dbg_printk(TPACPI_DBG_EXIT,
"restoring original hot key mask\n");
/* no short-circuit boolean operator below! */
if ((hotkey_mask_set(hotkey_orig_mask) |
hotkey_status_set(hotkey_orig_status)) != 0)
printk(TPACPI_ERR
"failed to restore hot key mask "
"to BIOS defaults\n");
}
}
static int __init hotkey_init(struct ibm_init_struct *iibm)
{
/* Requirements for changing the default keymaps:
*
* 1. Many of the keys are mapped to KEY_RESERVED for very
* good reasons. Do not change them unless you have deep
* knowledge on the IBM and Lenovo ThinkPad firmware for
* the various ThinkPad models. The driver behaves
* differently for KEY_RESERVED: such keys have their
* hot key mask *unset* in mask_recommended, and also
* in the initial hot key mask programmed into the
* firmware at driver load time, which means the firm-
* ware may react very differently if you change them to
* something else;
*
* 2. You must be subscribed to the linux-thinkpad and
* ibm-acpi-devel mailing lists, and you should read the
* list archives since 2007 if you want to change the
* keymaps. This requirement exists so that you will
* know the past history of problems with the thinkpad-
* acpi driver keymaps, and also that you will be
* listening to any bug reports;
*
* 3. Do not send thinkpad-acpi specific patches directly to
* for merging, *ever*. Send them to the linux-acpi
* mailinglist for comments. Merging is to be done only
* through acpi-test and the ACPI maintainer.
*
* If the above is too much to ask, don't change the keymap.
* Ask the thinkpad-acpi maintainer to do it, instead.
*/
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 0x1F: Other ACPI HKEY hot keys */
KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
KEY_UNKNOWN, /* 0x0D: FN+INSERT */
KEY_UNKNOWN, /* 0x0E: FN+DELETE */
/* brightness: firmware always reacts to them, unless
* X.org did some tricks in the radeon BIOS scratch
* registers of *some* models */
KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
KEY_RESERVED, /* 0x10: FN+END (brightness down) */
/* Thinklight: firmware always react to it */
KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */
KEY_UNKNOWN, /* 0x12: FN+PGDOWN */
KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */
/* Volume: firmware always react to it and reprograms
* the built-in *extra* mixer. Never map it to control
* another mixer by default. */
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 0x1F: Other ACPI HKEY hot keys */
KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */
KEY_UNKNOWN, /* 0x0D: FN+INSERT */
KEY_UNKNOWN, /* 0x0E: FN+DELETE */
/* These either have to go through ACPI video, or
* act like in the IBM ThinkPads, so don't ever
* enable them by default */
KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */
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) */
/* Volume: z60/z61, T60 (BIOS version?): firmware always
* react to it and reprograms the built-in *extra* mixer.
* Never map it to control another mixer by default.
*
* T60?, T61, R60?, R61: firmware and EC tries to send
* these over the regular keyboard, so these are no-ops,
* but there are still weird bugs re. MUTE, so do not
* change unless you get test reports from all Lenovo
* models. May cause the BIOS to interfere with the
* HDA mixer.
*/
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);
BUG_ON(tpacpi_inputdev->open != NULL ||
tpacpi_inputdev->close != NULL);
TPACPI_ACPIHANDLE_INIT(hkey);
mutex_init(&hotkey_mutex);
#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
mutex_init(&hotkey_thread_mutex);
mutex_init(&hotkey_thread_data_mutex);
#endif
/* 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)
return 1;
tpacpi_disable_brightness_delay();
hotkey_dev_attributes = create_attr_set(13, NULL);
if (!hotkey_dev_attributes)
return -ENOMEM;
res = add_many_to_attr_set(hotkey_dev_attributes,
hotkey_attributes,
ARRAY_SIZE(hotkey_attributes));
if (res)
goto err_exit;
/* 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(TPACPI_ERR "unknown version of the "
"HKEY interface: 0x%x\n", hkeyv);
printk(TPACPI_ERR "please report this to %s\n",
TPACPI_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(TPACPI_ERR
"missing MHKA handler, "
"please report this to %s\n",
TPACPI_MAIL);
/* FN+F12, FN+F4, FN+F3 */
hotkey_all_mask = 0x080cU;
}
}
/* hotkey_source_mask *must* be zero for
* the first hotkey_mask_get */
res = hotkey_status_get(&hotkey_orig_status);
if (res)
goto err_exit;
if (tp_features.hotkey_mask) {
res = hotkey_mask_get();
if (res)
goto err_exit;
hotkey_orig_mask = hotkey_mask;
res = add_many_to_attr_set(
hotkey_dev_attributes,
hotkey_mask_attributes,
ARRAY_SIZE(hotkey_mask_attributes));
if (res)
goto err_exit;
}
#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
if (tp_features.hotkey_mask) {
hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
& ~hotkey_all_mask;
} else {
hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
}
vdbg_printk(TPACPI_DBG_INIT,
"hotkey source mask 0x%08x, polling freq %d\n",
hotkey_source_mask, hotkey_poll_freq);
#endif
/* Not all thinkpads have a hardware radio switch */
if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
tp_features.hotkey_wlsw = 1;
printk(TPACPI_INFO
"radio switch found; radios are %s\n",
enabled(status, 0));
}
if (tp_features.hotkey_wlsw)
res = add_to_attr_set(hotkey_dev_attributes,
&dev_attr_hotkey_radio_sw.attr);
/* For X41t, X60t, X61t Tablets... */
if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
tp_features.hotkey_tablet = 1;
printk(TPACPI_INFO
"possible tablet mode switch found; "
"ThinkPad in %s mode\n",
(status & TP_HOTKEY_TABLET_MASK)?
"tablet" : "laptop");
res = add_to_attr_set(hotkey_dev_attributes,
&dev_attr_hotkey_tablet_mode.attr);
}
if (!res)
res = register_attr_set_with_sysfs(
hotkey_dev_attributes,
&tpacpi_pdev->dev.kobj);
if (res)
goto err_exit;
/* Set up key map */
hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
GFP_KERNEL);
if (!hotkey_keycode_map) {
printk(TPACPI_ERR
"failed to allocate memory for key map\n");
res = -ENOMEM;
goto err_exit;
}
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_RFKILL_ALL, tpacpi_inputdev->swbit);
}
if (tp_features.hotkey_tablet) {
set_bit(EV_SW, tpacpi_inputdev->evbit);
set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
}
/* Do not issue duplicate brightness change events to
* userspace */
if (!tp_features.bright_acpimode)
/* update bright_acpimode... */
tpacpi_check_std_acpi_brightness_support();
if (tp_features.bright_acpimode) {
printk(TPACPI_INFO
"This ThinkPad has standard ACPI backlight "
"brightness control, supported by the ACPI "
"video driver\n");
printk(TPACPI_NOTICE
"Disabling thinkpad-acpi brightness events "
"by default...\n");
/* The hotkey_reserved_mask change below is not
* necessary while the keys are at KEY_RESERVED in the
* default map, but better safe than sorry, leave it
* here as a marker of what we have to do, especially
* when we finally become able to set this at runtime
* on response to X.org requests */
hotkey_reserved_mask |=
(1 << TP_ACPI_HOTKEYSCAN_FNHOME)
| (1 << TP_ACPI_HOTKEYSCAN_FNEND);
}
dbg_printk(TPACPI_DBG_INIT, "enabling hot key handling\n");
res = hotkey_status_set(1);
if (res) {
hotkey_exit();
return res;
}
res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
& ~hotkey_reserved_mask)
| hotkey_orig_mask);
if (res < 0 && res != -ENXIO) {
hotkey_exit();
return res;
}
dbg_printk(TPACPI_DBG_INIT,
"legacy hot key reporting over procfs %s\n",
(hotkey_report_mode < 2) ?
"enabled" : "disabled");
tpacpi_inputdev->open = &hotkey_inputdev_open;
tpacpi_inputdev->close = &hotkey_inputdev_close;
hotkey_poll_setup_safe(1);
tpacpi_send_radiosw_update();
tpacpi_input_send_tabletsw();
return 0;
err_exit:
delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
hotkey_dev_attributes = NULL;
return (res < 0)? res : 1;
}
static void hotkey_notify(struct ibm_struct *ibm, u32 event)
{
u32 hkey;
unsigned int scancode;
int send_acpi_ev;
int ignore_acpi_ev;
int unk_ev;
if (event != 0x80) {
printk(TPACPI_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(TPACPI_ERR "failed to retrieve HKEY event\n");
return;
}
if (hkey == 0) {
/* queue empty */
return;
}
send_acpi_ev = 1;
ignore_acpi_ev = 0;
unk_ev = 0;
switch (hkey >> 12) {
case 1:
/* 0x1000-0x1FFF: key presses */
scancode = hkey & 0xfff;
if (scancode > 0 && scancode < 0x21) {
scancode--;
if (!(hotkey_source_mask & (1 << scancode))) {
tpacpi_input_send_key(scancode);
send_acpi_ev = 0;
} else {
ignore_acpi_ev = 1;
}
} else {
unk_ev = 1;
}
break;
case 2:
/* Wakeup reason */
switch (hkey) {
case 0x2304: /* suspend, undock */
case 0x2404: /* hibernation, undock */
hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
ignore_acpi_ev = 1;
break;
case 0x2305: /* suspend, bay eject */
case 0x2405: /* hibernation, bay eject */
hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
ignore_acpi_ev = 1;
break;
default:
unk_ev = 1;
}
if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
printk(TPACPI_INFO
"woke up due to a hot-unplug "
"request...\n");
hotkey_wakeup_reason_notify_change();
}
break;
case 3:
/* bay-related wakeups */
if (hkey == 0x3003) {
hotkey_autosleep_ack = 1;
printk(TPACPI_INFO
"bay ejected\n");
hotkey_wakeup_hotunplug_complete_notify_change();
} else {
unk_ev = 1;
}
break;
case 4:
/* dock-related wakeups */
if (hkey == 0x4003) {
hotkey_autosleep_ack = 1;
printk(TPACPI_INFO
"undocked\n");
hotkey_wakeup_hotunplug_complete_notify_change();
} else {
unk_ev = 1;
}
break;
case 5:
/* 0x5000-0x5FFF: human interface helpers */
switch (hkey) {
case 0x5010: /* Lenovo new BIOS: brightness changed */
case 0x500b: /* X61t: tablet pen inserted into bay */
case 0x500c: /* X61t: tablet pen removed from bay */
break;
case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
case 0x500a: /* X41t-X61t: swivel down (normal mode) */
tpacpi_input_send_tabletsw();
hotkey_tablet_mode_notify_change();
send_acpi_ev = 0;
break;
case 0x5001:
case 0x5002:
/* LID switch events. Do not propagate */
ignore_acpi_ev = 1;
break;
default:
unk_ev = 1;
}
break;
case 7:
/* 0x7000-0x7FFF: misc */
if (tp_features.hotkey_wlsw && hkey == 0x7000) {
tpacpi_send_radiosw_update();
send_acpi_ev = 0;
break;
}
/* fallthrough to default */
default:
unk_ev = 1;
}
if (unk_ev) {
printk(TPACPI_NOTICE
"unhandled HKEY event 0x%04x\n", hkey);
}
/* 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_suspend(pm_message_t state)
{
/* Do these on suspend, we get the events on early resume! */
hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
hotkey_autosleep_ack = 0;
}
static void hotkey_resume(void)
{
tpacpi_disable_brightness_delay();
if (hotkey_mask_get())
printk(TPACPI_ERR
"error while trying to read hot key mask "
"from firmware\n");
tpacpi_send_radiosw_update();
hotkey_tablet_mode_notify_change();
hotkey_wakeup_reason_notify_change();
hotkey_wakeup_hotunplug_complete_notify_change();
hotkey_poll_setup_safe(0);
}
/* procfs -------------------------------------------------------------- */
static int hotkey_read(char *p)
{
int res, status;
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_status_get(&status);
if (!res)
res = hotkey_mask_get();
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", hotkey_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;
if (!tp_features.hotkey)
return -ENODEV;
if (mutex_lock_interruptible(&hotkey_mutex))
return -ERESTARTSYS;
status = -1;
mask = hotkey_mask;
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;
}
}
if (status != -1)
res = hotkey_status_set(status);
if (!res && mask != hotkey_mask)
res = hotkey_mask_set(mask);
errexit:
mutex_unlock(&hotkey_mutex);
return res;
}
static const struct acpi_device_id ibm_htk_device_ids[] = {
{TPACPI_ACPI_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,
.suspend = hotkey_suspend,
.acpi = &ibm_hotkey_acpidriver,
};
/*************************************************************************
* Bluetooth subdriver
*/
enum {
/* ACPI GBDC/SBDC bits */
TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
TP_ACPI_BLUETOOTH_UNK = 0x04, /* unknown function */
};
static struct rfkill *tpacpi_bluetooth_rfkill;
static int bluetooth_get_radiosw(void)
{
int status;
if (!tp_features.bluetooth)
return -ENODEV;
/* WLSW overrides bluetooth in firmware/hardware, reflect that */
if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
return RFKILL_STATE_HARD_BLOCKED;
if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
return -EIO;
return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
}
static void bluetooth_update_rfk(void)
{
int status;
if (!tpacpi_bluetooth_rfkill)
return;
status = bluetooth_get_radiosw();
if (status < 0)
return;
rfkill_force_state(tpacpi_bluetooth_rfkill, status);
}
static int bluetooth_set_radiosw(int radio_on, int update_rfk)
{
int status;
if (!tp_features.bluetooth)
return -ENODEV;
/* WLSW overrides bluetooth in firmware/hardware, but there is no
* reason to risk weird behaviour. */
if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
&& radio_on)
return -EPERM;
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;
if (update_rfk)
bluetooth_update_rfk();
return 0;
}
/* 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 == RFKILL_STATE_UNBLOCKED) ? 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, 1);
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 tpacpi_bluetooth_rfk_get(void *data, enum rfkill_state *state)
{
int bts = bluetooth_get_radiosw();
if (bts < 0)
return bts;
*state = bts;
return 0;
}
static int tpacpi_bluetooth_rfk_set(void *data, enum rfkill_state state)
{
return bluetooth_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
}
static void bluetooth_exit(void)
{
if (tpacpi_bluetooth_rfkill)
rfkill_unregister(tpacpi_bluetooth_rfkill);
sysfs_remove_group(&tpacpi_pdev->dev.kobj,
&bluetooth_attr_group);
}
static int __init bluetooth_init(struct ibm_init_struct *iibm)
{
int res;
int status = 0;
vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
TPACPI_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 &&
!(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");
}
if (!tp_features.bluetooth)
return 1;
res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
&bluetooth_attr_group);
if (res)
return res;
res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
&tpacpi_bluetooth_rfkill,
RFKILL_TYPE_BLUETOOTH,
"tpacpi_bluetooth_sw",
tpacpi_bluetooth_rfk_set,
tpacpi_bluetooth_rfk_get);
if (res) {
bluetooth_exit();
return res;
}
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 == RFKILL_STATE_UNBLOCKED) ?
"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, 1);
} else if (strlencmp(cmd, "disable") == 0) {
bluetooth_set_radiosw(0, 1);
} 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
*/
enum {
/* ACPI GWAN/SWAN bits */
TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
TP_ACPI_WANCARD_UNK = 0x04, /* unknown function */
};
static struct rfkill *tpacpi_wan_rfkill;
static int wan_get_radiosw(void)
{
int status;
if (!tp_features.wan)
return -ENODEV;
/* WLSW overrides WWAN in firmware/hardware, reflect that */
if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
return RFKILL_STATE_HARD_BLOCKED;
if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
return -EIO;
return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?