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linux/drivers/misc/thinkpad_acpi.c
Henrique de Moraes Holschuh 6c231bd5eb ACPI: thinkpad-acpi: add tablet-mode reporting 
A quick study of the 0x5009/0x500A HKEY event on the X61t DSDT revealed the
existence of the EC HTAB register (EC 0x0f, bit 7), and a compare with the
X41t DSDT shows that HKEY.MHKG can be used to verify if the ThinkPad is
tablet-capable (MHKG present), and in tablet mode (bit 3 of MHKG return is
set).

Add an attribute to report this information, "hotkey_tablet_mode".  This
attribute has poll()/select() support, and can be used along with EV_SW
SW_TABLET_MODE to hook userspace to tablet events.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-16 00:34:06 -05:00

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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 "0.19"
#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 <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
/* 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_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
#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 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;
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;
};
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;
/****************************************************************************
****************************************************************************
*
* 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;
}
/*************************************************************************
* 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\n",
(thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
"IBM" : ((thinkpad_id.vendor ==
PCI_VENDOR_ID_LENOVO) ?
"Lenovo" : "Unknown vendor"),
thinkpad_id.model_str);
return 0;
}
static int thinkpad_acpi_driver_read(char *p)
{
int len = 0;
len += sprintf(p + len, "driver:\t\t%s\n", 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;
return ((s & TP_HOTKEY_TABLET_MASK) != 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) {
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_RADIO, !!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_FILE "d");
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 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 */
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) {
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)
return res;
/* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
for HKEY interface version 0x100 */
if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
if ((hkeyv >> 8) != 1) {
printk(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 && tp_features.hotkey_mask) {
res = hotkey_mask_get();
hotkey_orig_mask = hotkey_mask;
if (!res) {
res = add_many_to_attr_set(
hotkey_dev_attributes,
hotkey_mask_attributes,
ARRAY_SIZE(hotkey_mask_attributes));
}
}
#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 (!res && 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)
return res;
/* 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");
return -ENOMEM;
}
if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
dbg_printk(TPACPI_DBG_INIT,
"using Lenovo default hot key map\n");
memcpy(hotkey_keycode_map, &lenovo_keycode_map,
TPACPI_HOTKEY_MAP_SIZE);
} else {
dbg_printk(TPACPI_DBG_INIT,
"using IBM default hot key map\n");
memcpy(hotkey_keycode_map, &ibm_keycode_map,
TPACPI_HOTKEY_MAP_SIZE);
}
set_bit(EV_KEY, tpacpi_inputdev->evbit);
set_bit(EV_MSC, tpacpi_inputdev->evbit);
set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
tpacpi_inputdev->keycode = hotkey_keycode_map;
for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
if (hotkey_keycode_map[i] != KEY_RESERVED) {
set_bit(hotkey_keycode_map[i],
tpacpi_inputdev->keybit);
} else {
if (i < sizeof(hotkey_reserved_mask)*8)
hotkey_reserved_mask |= 1 << i;
}
}
if (tp_features.hotkey_wlsw) {
set_bit(EV_SW, tpacpi_inputdev->evbit);
set_bit(SW_RADIO, tpacpi_inputdev->swbit);
}
if (tp_features.hotkey_tablet) {
set_bit(EV_SW, tpacpi_inputdev->evbit);
set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
}
dbg_printk(TPACPI_DBG_INIT,
"enabling hot key handling\n");
res = hotkey_status_set(1);
if (res)
return res;
res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
& ~hotkey_reserved_mask)
| hotkey_orig_mask);
if (res < 0 && res != -ENXIO)
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 (tp_features.hotkey)? 0 : 1;
}
static void hotkey_exit(void)
{
#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
hotkey_poll_stop_sync();
#endif
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");
}
if (hotkey_dev_attributes) {
delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
hotkey_dev_attributes = NULL;
}
}
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 __init light_init(struct ibm_init_struct *iibm)
{
vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
TPACPI_ACPIHANDLE_INIT(ledb);
TPACPI_ACPIHANDLE_INIT(lght);
TPACPI_ACPIHANDLE_INIT(cmos);
/* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
if (tp_features.light)
/* light status not supported on
570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
tp_features.light_status =
acpi_evalf(ec_handle, NULL, "KBLT", "qv");
vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
str_supported(tp_features.light));
return (tp_features.light)? 0 : 1;
}
static int light_read(char *p)
{
int len = 0;
int status = 0;
if (!tp_features.light) {
len += sprintf(p + len, "status:\t\tnot supported\n");
} else if (!tp_features.light_status) {
len += sprintf(p + len, "status:\t\tunknown\n");
len += sprintf(p + len, "commands:\ton, off\n");
} else {
if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
return -EIO;
len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
len += sprintf(p + len, "commands:\ton, off\n");
}
return len;
}
static int light_write(char *buf)
{
int cmos_cmd, lght_cmd;
char *cmd;
int success;
if (!tp_features.light)
return -ENODEV;
while ((cmd = next_cmd(&buf))) {
if (strlencmp(cmd, "on") == 0) {
cmos_cmd = 0x0c;
lght_cmd = 1;
} else if (strlencmp(cmd, "off") == 0) {
cmos_cmd = 0x0d;
lght_cmd = 0;
} else
return -EINVAL;
success = cmos_handle ?
acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
if (!success)
return -EIO;
}
return 0;
}
static struct ibm_struct light_driver_data = {
.name = "light",
.read = light_read,
.write = light_write,
};
/*************************************************************************
* Dock subdriver
*/
#ifdef CONFIG_THINKPAD_ACPI_DOCK
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 */
};
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 */
static int __init led_init(struct ibm_init_struct *iibm)
{
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);
return (led_supported != TPACPI_LED_NONE)? 0 : 1;
}
#define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
static int led_read(char *p)
{
int len = 0;
if (!led_supported) {
len += sprintf(p + len, "status:\t\tnot supported\n");
return len;
}
len += sprintf(p + len, "status:\t\tsupported\n");
if (led_supported == TPACPI_LED_570) {
/* 570 */
int i, status;
for (i = 0; i < 8; i++) {
if (!acpi_evalf(ec_handle,
&status, "GLED", "dd", 1 << i))
return -EIO;
len += sprintf(p + len, "%d:\t\t%s\n",
i, led_status(status));
}
}
len += sprintf(p + len, "commands:\t"
"<led> on, <led> off, <led> blink (<led> is 0-7)\n");
return len;
}
/* off, on, blink */
static const int led_sled_arg1[] = { 0, 1, 3 };
static const int led_exp_hlbl[] = { 0, 0, 1 }; /* led# * */
static const int led_exp_hlcl[] = { 0, 1, 1 }; /* led# * */
static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
static int led_write(char *buf)
{
char *cmd;
int led, ind, ret;
if (!led_supported)
return -ENODEV;
while ((cmd = next_cmd(&buf))) {
if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
return -EINVAL;
if (strstr(cmd, "off")) {
ind = 0;
} else if (strstr(cmd, "on")) {
ind = 1;
} else if (strstr(cmd, "blink")) {
ind = 2;
} else
return -EINVAL;
if (led_supported == TPACPI_LED_570) {
/* 570 */
led = 1 << led;
if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
led, led_sled_arg1[ind]))
return -EIO;
} else if (led_supported == TPACPI_LED_OLD) {
/* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
led = 1 << led;
ret = ec_write(TPACPI_LED_EC_HLMS, led);
if (ret >= 0)
ret = ec_write(TPACPI_LED_EC_HLBL,
led * led_exp_hlbl[ind]);
if (ret >= 0)
ret = ec_write(TPACPI_LED_EC_HLCL,
led * led_exp_hlcl[ind]);
if (ret < 0)
return ret;
} else {
/* all others */
if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
led, led_led_arg1[ind]))
return -EIO;
}
}
return 0;
}
static struct ibm_struct led_driver_data = {
.name = "led",
.read = led_read,
.write = led_write,
};
/*************************************************************************
* Beep subdriver
*/
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"
static struct backlight_device *ibm_backlight_device;
static int brightness_offset = 0x31;
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.
*/
static int brightness_get(struct backlight_device *bd)
{
u8 lec = 0, lcmos = 0, level = 0;
if (brightness_mode & 1) {
if (!acpi_ec_read(brightness_offset, &lec))
return -EIO;
lec &= (tp_features.bright_16levels)? 0x0f : 0x07;
level = lec;
};
if (brightness_mode & 2) {
lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
& TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
>> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
level = lcmos;
}
if (brightness_mode == 3 && lec != lcmos) {
printk(TPACPI_ERR
"CMOS NVRAM (%u) and EC (%u) do not agree "
"on display brightness level\n",
(unsigned int) lcmos,
(unsigned int) lec);
return -EIO;
}
return level;
}
/* May return EINTR which can always be mapped to ERESTARTSYS */
static int brightness_set(int value)
{
int cmos_cmd, inc, i, res;
int current_value;
if (value > ((tp_features.bright_16levels)? 15 : 7))
return -EINVAL;
res = mutex_lock_interruptible(&brightness_mutex);
if (res < 0)
return res;
current_value = brightness_get(NULL);
if (current_value < 0) {
res = current_value;
goto errout;
}
cmos_cmd = value > current_value ?
TP_CMOS_BRIGHTNESS_UP :
TP_CMOS_BRIGHTNESS_DOWN;
inc = (value > current_value)? 1 : -1;
res = 0;
for (i = current_value; i != value; i += inc) {
if ((brightness_mode & 2) &&
issue_thinkpad_cmos_command(cmos_cmd)) {
res = -EIO;
goto errout;
}
if ((brightness_mode & 1) &&
!acpi_ec_write(brightness_offset, i + inc)) {
res = -EIO;
goto errout;;
}
}
errout:
mutex_unlock(&brightness_mutex);
return res;
}
/* 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 struct backlight_ops ibm_backlight_data = {
.get_brightness = brightness_get,
.update_status = brightness_update_status,
};
/* --------------------------------------------------------------------- */
static int __init tpacpi_query_bcll_levels(acpi_handle handle)
{
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *obj;
int rc;
if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
obj = (union acpi_object *)buffer.pointer;
if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
printk(TPACPI_ERR "Unknown BCLL 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 brightness_find_bcll(acpi_handle handle, u32 lvl,
void *context, void **rv)
{
char name[ACPI_PATH_SEGMENT_LENGTH];
struct acpi_buffer buffer = { sizeof(name), &name };
if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
!strncmp("BCLL", name, sizeof(name) - 1)) {
if (tpacpi_query_bcll_levels(handle) == 16) {
*rv = handle;
return AE_CTRL_TERMINATE;
} else {
return AE_OK;
}
} else {
return AE_OK;
}
}
static int __init brightness_check_levels(void)
{
int status;
void *found_node = NULL;
if (!vid_handle) {
TPACPI_ACPIHANDLE_INIT(vid);
}
if (!vid_handle)
return 0;
/* Search for a BCLL package with 16 levels */
status = acpi_walk_namespace(ACPI_TYPE_PACKAGE, vid_handle, 3,
brightness_find_bcll, NULL,
&found_node);
return (ACPI_SUCCESS(status) && found_node != NULL);
}
static acpi_status __init brightness_find_bcl(acpi_handle handle, u32 lvl,
void *context, void **rv)
{
char name[ACPI_PATH_SEGMENT_LENGTH];
struct acpi_buffer buffer = { sizeof(name), &name };
if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
!strncmp("_BCL", name, sizeof(name) - 1)) {
*rv = handle;
return AE_CTRL_TERMINATE;
} else {
return AE_OK;
}
}
static int __init brightness_check_std_acpi_support(void)
{
int status;
void *found_node = NULL;
if (!vid_handle) {
TPACPI_ACPIHANDLE_INIT(vid);
}
if (!vid_handle)
return 0;
/* Search for a _BCL method, but don't execute it */
status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
brightness_find_bcl, NULL, &found_node);
return (ACPI_SUCCESS(status) && found_node != NULL);
}
static int __init brightness_init(struct ibm_init_struct *iibm)
{
int b;
vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
mutex_init(&brightness_mutex);
if (!brightness_enable) {
dbg_printk(TPACPI_DBG_INIT,
"brightness support disabled by "
"module parameter\n");
return 1;
} else if (brightness_enable > 1) {
if (brightness_check_std_acpi_support()) {
printk(TPACPI_NOTICE
"standard ACPI backlight interface "
"available, not loading native one...\n");
return 1;
}
}
if (!brightness_mode) {
if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
brightness_mode = 2;
else
brightness_mode = 3;
dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
brightness_mode);
}
if (brightness_mode > 3)
return -EINVAL;
tp_features.bright_16levels =
thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO &&
brightness_check_levels();
b = brightness_get(NULL);
if (b < 0)
return 1;
if (tp_features.bright_16levels)
printk(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;
backlight_update_status(ibm_backlight_device);
return 0;
}
static void brightness_exit(void)
{
if (ibm_backlight_device) {
vdbg_printk(TPACPI_DBG_EXIT,
"calling backlight_device_unregister()\n");
backlight_device_unregister(ibm_backlight_device);
ibm_backlight_device = NULL;
}
}
static int brightness_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 (!schedule_delayed_work(&fan_watchdog_task,
msecs_to_jiffies(fan_watchdog_maxinterval
* 1000))) {
printk(TPACPI_ERR
"failed to schedule 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))
rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
&driver_attr_fan_watchdog);
if (rc < 0)
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_scheduled_work();
}
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 (strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
kfree(tp->model_str);
tp->model_str = NULL;
}
}
static int __init probe_for_thinkpad(void)
{
int is_thinkpad;
if (acpi_disabled)
return -ENODEV;
/*
* Non-ancient models have better DMI tagging, but very old models
* don't.
*/
is_thinkpad = (thinkpad_id.model_str != NULL);
/* ec is required because many other handles are relative to it */
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);
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);
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");
/*
* 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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