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linux/drivers/misc/thinkpad_acpi.c
Henrique de Moraes Holschuh 24e45bbe69 thinkpad-acpi: fix LED handling on older ThinkPads 
The less tested codepaths for LED handling, used on ThinkPads 570, 600e/x,
770e, 770x, A21e, A2xm/p, T20-22, X20 and maybe a few others, would write
data to kernel memory it had no business touching, for leds number 3 and
above.  If one is lucky, that illegal write would cause an OOPS, but
chances are it would silently corrupt a byte.

The problem was introduced in commit af116101, "ACPI: thinkpad-acpi: add
sysfs led class support to thinkpad leds (v3.2)".

Fix the bug by refactoring the entire code to be far more obvious on what
it wants to do.  Also do some defensive "constification".

Issue reported by Karol Lewandowski <lmctlx@gmail.com> (he's an lucky guy
and got an OOPS instead of silent corruption :-) ).

Root cause of the OOPS identified by Adrian Bunk <bunk@kernel.org>.
Thanks, Adrian!

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Tested-by: Karol Lewandowski <lmctlx@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-06-11 19:13:45 -04:00

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/*
* 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 "0.20"
#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 <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
/* 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_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;
}
acpi_driver_data(ibm->acpi->device) = 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 "kzalloc(ibm->driver) failed\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 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;
}
/*************************************************************************
* 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_radiosw(void)
{
int wlsw;
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);
}
}
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 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;
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));
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_input_send_radiosw();
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_input_send_radiosw();
hotkey_radio_sw_notify_change();
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)
{
if (hotkey_mask_get())
printk(TPACPI_ERR
"error while trying to read hot key mask "
"from firmware\n");
tpacpi_input_send_radiosw();
hotkey_radio_sw_notify_change();
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 int bluetooth_get_radiosw(void);
static int bluetooth_set_radiosw(int radio_on);
/* 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");
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) {
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
*/
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 int wan_get_radiosw(void);
static int wan_set_radiosw(int radio_on);
/* 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");
TPACPI_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
*/
#ifdef CONFIG_THINKPAD_ACPI_VIDEO
enum video_access_mode {
TPACPI_VIDEO_NONE = 0,
TPACPI_VIDEO_570, /* 570 */
TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
TPACPI_VIDEO_NEW, /* all others */
};
enum { /* video status flags, based on VIDEO_570 */
TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
};
enum { /* TPACPI_VIDEO_570 constants */
TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
* video_status_flags */
TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
};
static enum video_access_mode video_supported;
static int video_orig_autosw;
static int video_autosw_get(void);
static int video_autosw_set(int enable);
TPACPI_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");
TPACPI_ACPIHANDLE_INIT(vid);
TPACPI_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(TPACPI_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(TPACPI_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(TPACPI_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,
};
#endif /* CONFIG_THINKPAD_ACPI_VIDEO */
/*************************************************************************
* Light (thinklight) subdriver
*/
TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */
TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */
static int light_get_status(void)
{
int status = 0;
if (tp_features.light_status) {
if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
return -EIO;
return (!!status);
}
return -ENXIO;
}
static int light_set_status(int status)
{
int rc;
if (tp_features.light) {
if (cmos_handle) {
rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
(status)?
TP_CMOS_THINKLIGHT_ON :
TP_CMOS_THINKLIGHT_OFF);
} else {
rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
(status)? 1 : 0);
}
return (rc)? 0 : -EIO;
}
return -ENXIO;
}
static void light_set_status_worker(struct work_struct *work)
{
struct tpacpi_led_classdev *data =
container_of(work, struct tpacpi_led_classdev, work);
if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
light_set_status((data->new_brightness != LED_OFF));
}
static void light_sysfs_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
struct tpacpi_led_classdev *data =
container_of(led_cdev,
struct tpacpi_led_classdev,
led_classdev);
data->new_brightness = brightness;
queue_work(tpacpi_wq, &data->work);
}
static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
{
return (light_get_status() == 1)? LED_FULL : LED_OFF;
}
static struct tpacpi_led_classdev tpacpi_led_thinklight = {
.led_classdev = {
.name = "tpacpi::thinklight",
.brightness_set = &light_sysfs_set,
.brightness_get = &light_sysfs_get,
}
};
static int __init light_init(struct ibm_init_struct *iibm)
{
int rc;
vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
TPACPI_ACPIHANDLE_INIT(ledb);
TPACPI_ACPIHANDLE_INIT(lght);
TPACPI_ACPIHANDLE_INIT(cmos);
INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
/* 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, light status is %s\n",
str_supported(tp_features.light),
str_supported(tp_features.light_status));
if (!tp_features.light)
return 1;
rc = led_classdev_register(&tpacpi_pdev->dev,
&tpacpi_led_thinklight.led_classdev);
if (rc < 0) {
tp_features.light = 0;
tp_features.light_status = 0;
} else {
rc = 0;
}
return rc;
}
static void light_exit(void)
{
led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
if (work_pending(&tpacpi_led_thinklight.work))
flush_workqueue(tpacpi_wq);
}
static int light_read(char *p)
{
int len = 0;
int status;
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 {
status = light_get_status();
if (status < 0)
return status;
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)
{
char *cmd;
int newstatus = 0;
if (!tp_features.light)
return -ENODEV;
while ((cmd = next_cmd(&buf))) {
if (strlencmp(cmd, "on") == 0) {
newstatus = 1;
} else if (strlencmp(cmd, "off") == 0) {
newstatus = 0;
} else
return -EINVAL;
}
return light_set_status(newstatus);
}
static struct ibm_struct light_driver_data = {
.name = "light",
.read = light_read,
.write = light_write,
.exit = light_exit,
};
/*************************************************************************
* Dock subdriver
*/
#ifdef CONFIG_THINKPAD_ACPI_DOCK
static void dock_notify(struct ibm_struct *ibm, u32 event);
static int dock_read(char *p);
static int dock_write(char *buf);
TPACPI_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 */
TPACPI_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");
TPACPI_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) {
TPACPI_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(TPACPI_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
TPACPI_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 */
TPACPI_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
"_EJ0", /* all others */
); /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV", /* A3x, R32 */
"\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
); /* all others */
TPACPI_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");
TPACPI_ACPIHANDLE_INIT(bay);
if (bay_handle)
TPACPI_ACPIHANDLE_INIT(bay_ej);
TPACPI_ACPIHANDLE_INIT(bay2);
if (bay2_handle)
TPACPI_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");
TPACPI_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
*/
enum led_access_mode {
TPACPI_LED_NONE = 0,
TPACPI_LED_570, /* 570 */
TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
TPACPI_LED_NEW, /* all others */
};
enum { /* For TPACPI_LED_OLD */
TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
};
enum led_status_t {
TPACPI_LED_OFF = 0,
TPACPI_LED_ON,
TPACPI_LED_BLINK,
};
static enum led_access_mode led_supported;
TPACPI_HANDLE(led, ec, "SLED", /* 570 */
"SYSL", /* 600e/x, 770e, 770x, A21e, A2xm/p, */
/* T20-22, X20-21 */
"LED", /* all others */
); /* R30, R31 */
#define TPACPI_LED_NUMLEDS 8
static struct tpacpi_led_classdev *tpacpi_leds;
static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
/* there's a limit of 19 chars + NULL before 2.6.26 */
"tpacpi::power",
"tpacpi:orange:batt",
"tpacpi:green:batt",
"tpacpi::dock_active",
"tpacpi::bay_active",
"tpacpi::dock_batt",
"tpacpi::unknown_led",
"tpacpi::standby",
};
static int led_get_status(const unsigned int led)
{
int status;
enum led_status_t led_s;
switch (led_supported) {
case TPACPI_LED_570:
if (!acpi_evalf(ec_handle,
&status, "GLED", "dd", 1 << led))
return -EIO;
led_s = (status == 0)?
TPACPI_LED_OFF :
((status == 1)?
TPACPI_LED_ON :
TPACPI_LED_BLINK);
tpacpi_led_state_cache[led] = led_s;
return led_s;
default:
return -ENXIO;
}
/* not reached */
}
static int led_set_status(const unsigned int led,
const enum led_status_t ledstatus)
{
/* off, on, blink. Index is led_status_t */
static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
int rc = 0;
switch (led_supported) {
case TPACPI_LED_570:
/* 570 */
if (led > 7)
return -EINVAL;
if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
(1 << led), led_sled_arg1[ledstatus]))
rc = -EIO;
break;
case TPACPI_LED_OLD:
/* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
if (led > 7)
return -EINVAL;
rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
if (rc >= 0)
rc = ec_write(TPACPI_LED_EC_HLBL,
(ledstatus == TPACPI_LED_BLINK) << led);
if (rc >= 0)
rc = ec_write(TPACPI_LED_EC_HLCL,
(ledstatus != TPACPI_LED_OFF) << led);
break;
case TPACPI_LED_NEW:
/* all others */
if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
led, led_led_arg1[ledstatus]))
rc = -EIO;
break;
default:
rc = -ENXIO;
}
if (!rc)
tpacpi_led_state_cache[led] = ledstatus;
return rc;
}
static void led_sysfs_set_status(unsigned int led,
enum led_brightness brightness)
{
led_set_status(led,
(brightness == LED_OFF) ?
TPACPI_LED_OFF :
(tpacpi_led_state_cache[led] == TPACPI_LED_BLINK) ?
TPACPI_LED_BLINK : TPACPI_LED_ON);
}
static void led_set_status_worker(struct work_struct *work)
{
struct tpacpi_led_classdev *data =
container_of(work, struct tpacpi_led_classdev, work);
if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
led_sysfs_set_status(data->led, data->new_brightness);
}
static void led_sysfs_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
struct tpacpi_led_classdev *data = container_of(led_cdev,
struct tpacpi_led_classdev, led_classdev);
data->new_brightness = brightness;
queue_work(tpacpi_wq, &data->work);
}
static int led_sysfs_blink_set(struct led_classdev *led_cdev,
unsigned long *delay_on, unsigned long *delay_off)
{
struct tpacpi_led_classdev *data = container_of(led_cdev,
struct tpacpi_led_classdev, led_classdev);
/* Can we choose the flash rate? */
if (*delay_on == 0 && *delay_off == 0) {
/* yes. set them to the hardware blink rate (1 Hz) */
*delay_on = 500; /* ms */
*delay_off = 500; /* ms */
} else if ((*delay_on != 500) || (*delay_off != 500))
return -EINVAL;
data->new_brightness = TPACPI_LED_BLINK;
queue_work(tpacpi_wq, &data->work);
return 0;
}
static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
{
int rc;
struct tpacpi_led_classdev *data = container_of(led_cdev,
struct tpacpi_led_classdev, led_classdev);
rc = led_get_status(data->led);
if (rc == TPACPI_LED_OFF || rc < 0)
rc = LED_OFF; /* no error handling in led class :( */
else
rc = LED_FULL;
return rc;
}
static void led_exit(void)
{
unsigned int i;
for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
if (tpacpi_leds[i].led_classdev.name)
led_classdev_unregister(&tpacpi_leds[i].led_classdev);
}
kfree(tpacpi_leds);
}
static int __init led_init(struct ibm_init_struct *iibm)
{
unsigned int i;
int rc;
vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
TPACPI_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);
tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
GFP_KERNEL);
if (!tpacpi_leds) {
printk(TPACPI_ERR "Out of memory for LED data\n");
return -ENOMEM;
}
for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
tpacpi_leds[i].led = i;
tpacpi_leds[i].led_classdev.brightness_set = &led_sysfs_set;
tpacpi_leds[i].led_classdev.blink_set = &led_sysfs_blink_set;
if (led_supported == TPACPI_LED_570)
tpacpi_leds[i].led_classdev.brightness_get =
&led_sysfs_get;
tpacpi_leds[i].led_classdev.name = tpacpi_led_names[i];
INIT_WORK(&tpacpi_leds[i].work, led_set_status_worker);
rc = led_classdev_register(&tpacpi_pdev->dev,
&tpacpi_leds[i].led_classdev);
if (rc < 0) {
tpacpi_leds[i].led_classdev.name = NULL;
led_exit();
return rc;
}
}
return (led_supported != TPACPI_LED_NONE)? 0 : 1;
}
#define str_led_status(s) \
((s) == TPACPI_LED_OFF ? "off" : \
((s) == TPACPI_LED_ON ? "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++) {
status = led_get_status(i);
if (status < 0)
return -EIO;
len += sprintf(p + len, "%d:\t\t%s\n",
i, str_led_status(status));
}
}
len += sprintf(p + len, "commands:\t"
"<led> on, <led> off, <led> blink (<led> is 0-7)\n");
return len;
}
static int led_write(char *buf)
{
char *cmd;
int led, rc;
enum led_status_t s;
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")) {
s = TPACPI_LED_OFF;
} else if (strstr(cmd, "on")) {
s = TPACPI_LED_ON;
} else if (strstr(cmd, "blink")) {
s = TPACPI_LED_BLINK;
} else {
return -EINVAL;
}
rc = led_set_status(led, s);
if (rc < 0)
return rc;
}
return 0;
}
static struct ibm_struct led_driver_data = {
.name = "led",
.read = led_read,
.write = led_write,
.exit = led_exit,
};
/*************************************************************************
* Beep subdriver
*/
TPACPI_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");
TPACPI_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
*/
enum thermal_access_mode {
TPACPI_THERMAL_NONE = 0, /* No thermal support */
TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
};
enum { /* TPACPI_THERMAL_TPEC_* */
TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
};
#define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
struct ibm_thermal_sensors_struct {
s32 temp[TPACPI_MAX_THERMAL_SENSORS];
};
static enum thermal_access_mode thermal_read_mode;
/* 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;
}
/* 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(TPACPI_ERR
"ThinkPad ACPI EC access misbehaving, "
"falling back to ACPI TMPx access "
"mode\n");
thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
} else {
printk(TPACPI_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;
}
}
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
*/
#define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
enum {
TP_EC_BACKLIGHT = 0x31,
/* TP_EC_BACKLIGHT bitmasks */
TP_EC_BACKLIGHT_LVLMSK = 0x1F,
TP_EC_BACKLIGHT_CMDMSK = 0xE0,
TP_EC_BACKLIGHT_MAPSW = 0x20,
};
static struct backlight_device *ibm_backlight_device;
static int brightness_mode;
static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
static struct mutex brightness_mutex;
/*
* ThinkPads can read brightness from two places: EC 0x31, or
* CMOS NVRAM byte 0x5E, bits 0-3.
*
* EC 0x31 has the following layout
* Bit 7: unknown function
* Bit 6: unknown function
* Bit 5: Z: honour scale changes, NZ: ignore scale changes
* Bit 4: must be set to zero to avoid problems
* Bit 3-0: backlight brightness level
*
* brightness_get_raw returns status data in the EC 0x31 layout
*/
static int brightness_get_raw(int *status)
{
u8 lec = 0, lcmos = 0, level = 0;
if (brightness_mode & 1) {
if (!acpi_ec_read(TP_EC_BACKLIGHT, &lec))
return -EIO;
level = lec & TP_EC_BACKLIGHT_LVLMSK;
};
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) {
*status = lec; /* Prefer EC, CMOS is just a backing store */
lec &= TP_EC_BACKLIGHT_LVLMSK;
if (lec == lcmos)
tp_warned.bright_cmos_ec_unsync = 0;
else {
if (!tp_warned.bright_cmos_ec_unsync) {
printk(TPACPI_ERR
"CMOS NVRAM (%u) and EC (%u) do not "
"agree on display brightness level\n",
(unsigned int) lcmos,
(unsigned int) lec);
tp_warned.bright_cmos_ec_unsync = 1;
}
return -EIO;
}
} else {
*status = level;
}
return 0;
}
/* 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;
int command_bits;
if (value > ((tp_features.bright_16levels)? 15 : 7) ||
value < 0)
return -EINVAL;
res = mutex_lock_interruptible(&brightness_mutex);
if (res < 0)
return res;
res = brightness_get_raw(&current_value);
if (res < 0)
goto errout;
command_bits = current_value & TP_EC_BACKLIGHT_CMDMSK;
current_value &= TP_EC_BACKLIGHT_LVLMSK;
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(TP_EC_BACKLIGHT,
(i + inc) | command_bits)) {
res = -EIO;
goto errout;;
}
}
errout:
mutex_unlock(&brightness_mutex);
return res;
}
/* sysfs backlight class ----------------------------------------------- */
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);
}
static int brightness_get(struct backlight_device *bd)
{
int status, res;
res = brightness_get_raw(&status);
if (res < 0)
return 0; /* FIXME: teach backlight about error handling */
return status & TP_EC_BACKLIGHT_LVLMSK;
}
static struct backlight_ops ibm_backlight_data = {
.get_brightness = brightness_get,
.update_status = brightness_update_status,
};
/* --------------------------------------------------------------------- */
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);
/*
* We always attempt to detect acpi support, so as to switch
* Lenovo Vista BIOS to ACPI brightness mode even if we are not
* going to publish a backlight interface
*/
b = tpacpi_check_std_acpi_brightness_support();
if (b > 0) {
if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
printk(TPACPI_NOTICE
"Lenovo BIOS switched to ACPI backlight "
"control mode\n");
}
if (brightness_enable > 1) {
printk(TPACPI_NOTICE
"standard ACPI backlight interface "
"available, not loading native one...\n");
return 1;
}
}
if (!brightness_enable) {
dbg_printk(TPACPI_DBG_INIT,
"brightness support disabled by "
"module parameter\n");
return 1;
}
if (b > 16) {
printk(TPACPI_ERR
"Unsupported brightness interface, "
"please contact %s\n", TPACPI_MAIL);
return 1;
}
if (b == 16)
tp_features.bright_16levels = 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;
if (brightness_get_raw(&b) < 0)
return 1;
if (tp_features.bright_16levels)
printk(TPACPI_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(TPACPI_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 & TP_EC_BACKLIGHT_LVLMSK;
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);
}
}
static int brightness_read(char *p)
{
int len = 0;
int level;
level = brightness_get(NULL);
if (level < 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_offset = 0x30;
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.
*/
enum { /* Fan control constants */
fan_status_offset = 0x2f, /* EC register 0x2f */
fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
* 0x84 must be read before 0x85 */
TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */
TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
};
enum fan_status_access_mode {
TPACPI_FAN_NONE = 0, /* No fan status or control */
TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
};
enum fan_control_access_mode {
TPACPI_FAN_WR_NONE = 0, /* No fan control */
TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
};
enum fan_control_commands {
TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
* and also watchdog cmd */
};
static int fan_control_allowed;
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 int fan_watchdog_maxinterval;
static struct mutex fan_mutex;
static void fan_watchdog_fire(struct work_struct *ignored);
static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */
TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
"\\FSPD", /* 600e/x, 770e, 770x */
); /* all others */
TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
"JFNS", /* 770x-JL */
); /* all others */
/*
* 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 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 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_AUTO)
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 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 (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
msecs_to_jiffies(fan_watchdog_maxinterval
* 1000))) {
printk(TPACPI_ERR
"failed to queue the fan watchdog, "
"watchdog will not trigger\n");
}
} else
fan_watchdog_active = 0;
}
static void fan_watchdog_fire(struct work_struct *ignored)
{
int rc;
if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
return;
printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
rc = fan_set_enable();
if (rc < 0) {
printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
"will try again later...\n", -rc);
/* reschedule for later */
fan_watchdog_reset();
}
}
/*
* 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;
TPACPI_ACPIHANDLE_INIT(fans);
TPACPI_ACPIHANDLE_INIT(gfan);
TPACPI_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(TPACPI_NOTICE
"fan_init: initial fan status "
"is unknown, assuming it is "
"in auto mode\n");
tp_features.fan_ctrl_status_undef = 1;
;;
}
}
} else {
printk(TPACPI_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)
return rc;
rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
&driver_attr_fan_watchdog);
if (rc < 0) {
sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
&fan_attr_group);
return rc;
}
return 0;
} else
return 1;
}
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_workqueue(tpacpi_wq);
}
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 */
rc = fan_get_status_safe(&status);
if (rc < 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 */
rc = fan_get_status_safe(&status);
if (rc < 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");
rc = fan_get_speed(&speed);
if (rc < 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;
*rc = fan_set_level_safe(level);
if (*rc == -ENXIO)
printk(TPACPI_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;
*rc = fan_set_enable();
if (*rc == -ENXIO)
printk(TPACPI_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;
*rc = fan_set_disable();
if (*rc == -ENXIO)
printk(TPACPI_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;
*rc = fan_set_speed(speed);
if (*rc == -ENXIO)
printk(TPACPI_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", TPACPI_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;
/*
* Module and infrastructure proble, init and exit handling
*/
static int force_load;
#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 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);
}
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(TPACPI_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(TPACPI_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;
}
/* 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 (tp->model_str && strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
kfree(tp->model_str);
tp->model_str = NULL;
}
tp->nummodel_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_NAME),
GFP_KERNEL);
}
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 */
TPACPI_ACPIHANDLE_INIT(ec);
if (!ec_handle) {
if (is_thinkpad)
printk(TPACPI_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,
},
#ifdef CONFIG_THINKPAD_ACPI_VIDEO
{
.init = video_init,
.data = &video_driver_data,
},
#endif
{
.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;
}
module_param(experimental, int, 0);
MODULE_PARM_DESC(experimental,
"Enables experimental features when non-zero");
module_param_named(debug, dbg_level, uint, 0);
MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
module_param(force_load, bool, 0);
MODULE_PARM_DESC(force_load,
"Attempts to load the driver even on a "
"mis-identified ThinkPad when true");
module_param_named(fan_control, fan_control_allowed, bool, 0);
MODULE_PARM_DESC(fan_control,
"Enables setting fan parameters features when true");
module_param_named(brightness_mode, brightness_mode, int, 0);
MODULE_PARM_DESC(brightness_mode,
"Selects brightness control strategy: "
"0=auto, 1=EC, 2=CMOS, 3=both");
module_param(brightness_enable, uint, 0);
MODULE_PARM_DESC(brightness_enable,
"Enables backlight control when 1, disables when 0");
module_param(hotkey_report_mode, uint, 0);
MODULE_PARM_DESC(hotkey_report_mode,
"used for backwards compatibility with userspace, "
"see documentation");
#define TPACPI_PARAM(feature) \
module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
"at module load, see documentation")
TPACPI_PARAM(hotkey);
TPACPI_PARAM(bluetooth);
TPACPI_PARAM(video);
TPACPI_PARAM(light);
#ifdef CONFIG_THINKPAD_ACPI_DOCK
TPACPI_PARAM(dock);
#endif
#ifdef CONFIG_THINKPAD_ACPI_BAY
TPACPI_PARAM(bay);
#endif /* CONFIG_THINKPAD_ACPI_BAY */
TPACPI_PARAM(cmos);
TPACPI_PARAM(led);
TPACPI_PARAM(beep);
TPACPI_PARAM(ecdump);
TPACPI_PARAM(brightness);
TPACPI_PARAM(volume);
TPACPI_PARAM(fan);
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(TPACPI_PROC_DIR, acpi_root_dir);
if (tpacpi_wq)
destroy_workqueue(tpacpi_wq);
kfree(thinkpad_id.bios_version_str);
kfree(thinkpad_id.ec_version_str);
kfree(thinkpad_id.model_str);
}
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 */
TPACPI_ACPIHANDLE_INIT(ecrd);
TPACPI_ACPIHANDLE_INIT(ecwr);
tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
if (!tpacpi_wq) {
thinkpad_acpi_module_exit();
return -ENOMEM;
}
proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
if (!proc_dir) {
printk(TPACPI_ERR
"unable to create proc dir " TPACPI_PROC_DIR);
thinkpad_acpi_module_exit();
return -ENODEV;
}
proc_dir->owner = THIS_MODULE;
ret = platform_driver_register(&tpacpi_pdriver);
if (ret) {
printk(TPACPI_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(TPACPI_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(TPACPI_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(TPACPI_DRVR_NAME, -1,
NULL, 0);
if (IS_ERR(tpacpi_pdev)) {
ret = PTR_ERR(tpacpi_pdev);
tpacpi_pdev = NULL;
printk(TPACPI_ERR "unable to register platform device\n");
thinkpad_acpi_module_exit();
return ret;
}
tpacpi_sensors_pdev = platform_device_register_simple(
TPACPI_HWMON_DRVR_NAME,
-1, NULL, 0);
if (IS_ERR(tpacpi_sensors_pdev)) {
ret = PTR_ERR(tpacpi_sensors_pdev);
tpacpi_sensors_pdev = NULL;
printk(TPACPI_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(TPACPI_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(TPACPI_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(TPACPI_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 = TPACPI_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(TPACPI_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;
}
/* Please remove this in year 2009 */
MODULE_ALIAS("ibm_acpi");
MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
/*
* 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]");
MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
MODULE_DESCRIPTION(TPACPI_DESC);
MODULE_VERSION(TPACPI_VERSION);
MODULE_LICENSE("GPL");
module_init(thinkpad_acpi_module_init);
module_exit(thinkpad_acpi_module_exit);
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