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Staging: add pcc-acpi driver

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Adds the pcc-acpi driver to the staging tree.

From: Hiroshi Miura <miura@da-cha.org>
Cc: YOKOTA Hiroshi <yokota@netlab.is.tsukuba.ac.jp>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Hiroshi Miura 2008-10-22 09:56:28 -07:00 committed by Greg Kroah-Hartman
parent 2515ddc6db
commit c2bf092e02
6 changed files with 996 additions and 0 deletions
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2
drivers/staging/Kconfig
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@ -43,4 +43,6 @@ source "drivers/staging/echo/Kconfig"
source "drivers/staging/at76_usb/Kconfig"
source "drivers/staging/pcc-acpi/Kconfig"
endif # STAGING

1
drivers/staging/Makefile
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@ -13,3 +13,4 @@ obj-$(CONFIG_W35UND) += winbond/
obj-$(CONFIG_PRISM2_USB) += wlan-ng/
obj-$(CONFIG_ECHO) += echo/
obj-$(CONFIG_USB_ATMEL) += at76_usb/
obj-$(CONFIG_PCC_ACPI) += pcc-acpi/

11
drivers/staging/pcc-acpi/Kconfig Normal file
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@ -0,0 +1,11 @@
config PCC_ACPI
tristate "Panasonic ACPI Hotkey support"
depends on ACPI
default n
---help---
This driver provides support for Panasonic hotkeys through the
ACPI interface. This works for the Panasonic R1 (N variant),
R2, R3, T2, W2, and Y2 laptops.
To compile this driver as a module, choose M here. The module
will be called pcc-acpi.

1
drivers/staging/pcc-acpi/Makefile Normal file
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@ -0,0 +1 @@
obj-$(CONFIG_PCC_ACPI) += pcc-acpi.o

7
drivers/staging/pcc-acpi/TODO Normal file
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@ -0,0 +1,7 @@
TODO:
- Lindent fixes
- checkpatch.pl fixes
- verify that the acpi interface is correct
- remove /proc dependancy if needed (not sure yet.)
Please send any patches for this driver to Greg Kroah-Hartman <greg@kroah.com>

974
drivers/staging/pcc-acpi/pcc-acpi.c Normal file
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@ -0,0 +1,974 @@
/*
* Panasonic HotKey and lcd brightness control Extra driver
* (C) 2004 Hiroshi Miura <miura@da-cha.org>
* (C) 2004 NTT DATA Intellilink Co. http://www.intellilink.co.jp/
* (C) YOKOTA Hiroshi <yokota (at) netlab. is. tsukuba. ac. jp>
* (C) 2004 David Bronaugh <dbronaugh>
*
* derived from toshiba_acpi.c, Copyright (C) 2002-2004 John Belmonte
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* publicshed by the Free Software Foundation.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*---------------------------------------------------------------------------
*
* ChangeLog:
*
* Nov.04, 2006 Hiroshi Miura <miura@da-cha.org>
* -v0.9 remove warning about section reference.
* remove acpi_os_free
* add /proc/acpi/pcc/brightness interface to allow HAL to access.
* merge dbronaugh's enhancement
* Aug.17, 2004 David Bronaugh (dbronaugh)
* - Added screen brightness setting interface
* Thanks to the FreeBSD crew (acpi_panasonic.c authors)
* for the ideas I needed to accomplish it
*
* May.29, 2006 Hiroshi Miura <miura@da-cha.org>
* -v0.8.4 follow to change keyinput structure
* thanks Fabian Yamaguchi <fabs@cs.tu-berlin.de>,
* Jacob Bower <jacob.bower@ic.ac.uk> and
* Hiroshi Yokota for providing solutions.
*
* Oct.02, 2004 Hiroshi Miura <miura@da-cha.org>
* -v0.8.2 merge code of YOKOTA Hiroshi <yokota@netlab.is.tsukuba.ac.jp>.
* Add sticky key mode interface.
* Refactoring acpi_pcc_generete_keyinput().
*
* Sep.15, 2004 Hiroshi Miura <miura@da-cha.org>
* -v0.8 Generate key input event on input subsystem.
* This is based on yet another driver written by Ryuta Nakanishi.
*
* Sep.10, 2004 Hiroshi Miura <miura@da-cha.org>
* -v0.7 Change proc interface functions using seq_file
* facility as same as other ACPI drivers.
*
* Aug.28, 2004 Hiroshi Miura <miura@da-cha.org>
* -v0.6.4 Fix a silly error with status checking
*
* Aug.25, 2004 Hiroshi Miura <miura@da-cha.org>
* -v0.6.3 replace read_acpi_int by standard function acpi_evaluate_integer
* some clean up and make smart copyright notice.
* fix return value of pcc_acpi_get_key()
* fix checking return value of acpi_bus_register_driver()
*
* Aug.22, 2004 David Bronaugh <dbronaugh@linuxboxen.org>
* -v0.6.2 Add check on ACPI data (num_sifr)
* Coding style cleanups, better error messages/handling
* Fixed an off-by-one error in memory allocation
*
* Aug.21, 2004 David Bronaugh <dbronaugh@linuxboxen.org>
* -v0.6.1 Fix a silly error with status checking
*
* Aug.20, 2004 David Bronaugh <dbronaugh@linuxboxen.org>
* - v0.6 Correct brightness controls to reflect reality
* based on information gleaned by Hiroshi Miura
* and discussions with Hiroshi Miura
*
* Aug.10, 2004 Hiroshi Miura <miura@da-cha.org>
* - v0.5 support LCD brightness control
* based on the disclosed information by MEI.
*
* Jul.25, 2004 Hiroshi Miura <miura@da-cha.org>
* - v0.4 first post version
* add function to retrive SIFR
*
* Jul.24, 2004 Hiroshi Miura <miura@da-cha.org>
* - v0.3 get proper status of hotkey
*
* Jul.22, 2004 Hiroshi Miura <miura@da-cha.org>
* - v0.2 add HotKey handler
*
* Jul.17, 2004 Hiroshi Miura <miura@da-cha.org>
* - v0.1 start from toshiba_acpi driver written by John Belmonte
*
*/
#define ACPI_PCC_VERSION "0.9"
#include <linux/version.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <linux/ctype.h>
#include <linux/seq_file.h>
#include <asm/uaccess.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
#include <linux/input.h>
/*************************************************************************
* "seq" file template definition.
*/
/* "seq" initializer */
#define SEQ_OPEN_FS(_open_func_name_, _show_func_name_) \
static int _open_func_name_(struct inode *inode, struct file *file) \
{ \
return single_open(file, _show_func_name_, PDE(inode)->data); \
}
/*-------------------------------------------------------------------------
* "seq" fops template for read-only files.
*/
#define SEQ_FILEOPS_R(_open_func_name_) \
{ \
.open = _open_func_name_, \
.read = seq_read, \
.llseek = seq_lseek, \
.release = single_release, \
}
/*------------------------------------------------------------------------
* "seq" fops template for read-write files.
*/
#define SEQ_FILEOPS_RW(_open_func_name_, _write_func_name_) \
{ \
.open = _open_func_name_ , \
.read = seq_read, \
.write = _write_func_name_, \
.llseek = seq_lseek, \
.release = single_release, \
}
/*
* "seq" file template definition ended.
***************************************************************************
*/
#ifndef ACPI_HOTKEY_COMPONENT
#define ACPI_HOTKEY_COMPONENT 0x10000000
#endif
#define _COMPONENT ACPI_HOTKEY_COMPONENT
ACPI_MODULE_NAME("pcc_acpi")
MODULE_AUTHOR("Hiroshi Miura");
MODULE_DESCRIPTION("ACPI HotKey driver for Panasonic Lets Note laptops");
MODULE_LICENSE("GPL");
#define LOGPREFIX "pcc_acpi: "
/****************************************************
* Define ACPI PATHs
****************************************************/
/* Lets note hotkeys */
#define METHOD_HKEY_QUERY "HINF"
#define METHOD_HKEY_SQTY "SQTY"
#define METHOD_HKEY_SINF "SINF"
#define METHOD_HKEY_SSET "SSET"
#define HKEY_NOTIFY 0x80
/* for brightness control */
#define LCD_MAX_BRIGHTNESS 255
/* This may be magical -- beware */
#define LCD_BRIGHTNESS_INCREMENT 17
/* Registers of SINF */
#define SINF_LCD_BRIGHTNESS 4
/*******************************************************************
*
* definitions for /proc/ interface
*
*******************************************************************/
#define ACPI_PCC_DRIVER_NAME "PCC Extra Driver"
#define ACPI_PCC_DEVICE_NAME "PCCExtra"
#define ACPI_PCC_CLASS "pcc"
#define PROC_PCC ACPI_PCC_CLASS
#define ACPI_PCC_INPUT_PHYS "panasonic/hkey0"
/* This is transitional definition */
#ifndef KEY_BATT
# define KEY_BATT 227
#endif
#define PROC_STR_MAX_LEN 8
/* LCD_TYPEs: 0 = Normal, 1 = Semi-transparent
ENV_STATEs: Normal temp=0x01, High temp=0x81, N/A=0x00
*/
enum SINF_BITS { SINF_NUM_BATTERIES = 0,
SINF_LCD_TYPE, /* 1 */
SINF_AC_MAX_BRIGHT, SINF_AC_MIN_BRIGHT, SINF_AC_CUR_BRIGHT, /* 2, 3, 4 */
/* 4 = R1 only handle SINF_AC_CUR_BRIGHT as SINF_CUR_BRIGHT and don't know AC state */
SINF_DC_MAX_BRIGHT, SINF_DC_MIN_BRIGHT, SINF_DC_CUR_BRIGHT, /* 5, 6, 7 */
SINF_MUTE,
SINF_RESERVED, SINF_ENV_STATE, /* 9, 10 */
SINF_STICKY_KEY = 0x80,
};
static int acpi_pcc_hotkey_add(struct acpi_device *device);
static int acpi_pcc_hotkey_remove(struct acpi_device *device, int type);
static int acpi_pcc_hotkey_resume(struct acpi_device *device);
static const struct acpi_device_id pcc_device_ids[] = {
{"MAT0012", 0},
{"MAT0013", 0},
{"MAT0018", 0},
{"MAT0019", 0},
{"", 0},
};
MODULE_DEVICE_TABLE(acpi, pcc_device_ids);
static struct acpi_driver acpi_pcc_driver = {
.name = ACPI_PCC_DRIVER_NAME,
.class = ACPI_PCC_CLASS,
.ids = pcc_device_ids,
.ops = {
.add = acpi_pcc_hotkey_add,
.remove = acpi_pcc_hotkey_remove,
.resume = acpi_pcc_hotkey_resume,
},
};
struct acpi_hotkey {
acpi_handle handle;
struct acpi_device *device;
struct proc_dir_entry *proc_dir_entry;
unsigned long num_sifr;
unsigned long status;
struct input_dev *input_dev;
int sticky_mode;
};
struct pcc_keyinput {
struct acpi_hotkey *hotkey;
int key_mode;
};
/* --------------------------------------------------------------------------
method access functions
-------------------------------------------------------------------------- */
static int acpi_pcc_write_sset(struct acpi_hotkey *hotkey, int func, int val)
{
union acpi_object in_objs[] = {
{ .integer.type = ACPI_TYPE_INTEGER,
.integer.value = func, },
{ .integer.type = ACPI_TYPE_INTEGER,
.integer.value = val, },
};
struct acpi_object_list params = {
.count = ARRAY_SIZE(in_objs),
.pointer = in_objs,
};
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE("acpi_pcc_write_sset");
status = acpi_evaluate_object(hotkey->handle, METHOD_HKEY_SSET, &params, NULL);
return_VALUE(status == AE_OK);
}
static inline int acpi_pcc_get_sqty(struct acpi_device *device)
{
unsigned long s;
acpi_status status;
ACPI_FUNCTION_TRACE("acpi_pcc_get_sqty");
status = acpi_evaluate_integer(device->handle, METHOD_HKEY_SQTY, NULL, &s);
if (ACPI_SUCCESS(status)) {
return_VALUE(s);
} else {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
"evaluation error HKEY.SQTY\n"));
return_VALUE(-EINVAL);
}
}
static int acpi_pcc_retrieve_biosdata(struct acpi_hotkey *hotkey, u32* sinf)
{
acpi_status status;
struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
union acpi_object *hkey = NULL;
int i;
ACPI_FUNCTION_TRACE("acpi_pcc_retrieve_biosdata");
status = acpi_evaluate_object(hotkey->handle, METHOD_HKEY_SINF, 0 , &buffer);
if (ACPI_FAILURE(status)) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "evaluation error HKEY.SINF\n"));
return_VALUE(0);
}
hkey = buffer.pointer;
if (!hkey || (hkey->type != ACPI_TYPE_PACKAGE)) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid HKEY.SINF\n"));
goto end;
}
if (hotkey->num_sifr < hkey->package.count) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "SQTY reports bad SINF length\n"));
status = AE_ERROR;
goto end;
}
for (i = 0; i < hkey->package.count; i++) {
union acpi_object *element = &(hkey->package.elements[i]);
if (likely(element->type == ACPI_TYPE_INTEGER)) {
sinf[i] = element->integer.value;
} else {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid HKEY.SINF data\n"));
}
}
sinf[hkey->package.count] = -1;
end:
kfree(buffer.pointer);
return_VALUE(status == AE_OK);
}
static int acpi_pcc_read_sinf_field(struct seq_file *seq, int field)
{
struct acpi_hotkey *hotkey = (struct acpi_hotkey *) seq->private;
u32* sinf = kmalloc(sizeof(u32) * (hotkey->num_sifr + 1), GFP_KERNEL);
ACPI_FUNCTION_TRACE("acpi_pcc_read_sinf_field");
if (!sinf) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Couldn't allocate %li bytes\n",
sizeof(u32) * hotkey->num_sifr));
return_VALUE(0);
}
if (acpi_pcc_retrieve_biosdata(hotkey, sinf)) {
seq_printf(seq, "%u\n", sinf[field]);
} else {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Couldn't retrieve BIOS data\n"));
}
kfree(sinf);
return_VALUE(0);
}
/* --------------------------------------------------------------------------
user interface functions
-------------------------------------------------------------------------- */
/* read methods */
/* Sinf read methods */
#define PCC_SINF_READ_F(_name_, FUNC) \
static int _name_ (struct seq_file *seq, void *offset) \
{ \
return acpi_pcc_read_sinf_field(seq, (FUNC)); \
}
PCC_SINF_READ_F(acpi_pcc_numbatteries_show, SINF_NUM_BATTERIES);
PCC_SINF_READ_F(acpi_pcc_lcdtype_show, SINF_LCD_TYPE);
PCC_SINF_READ_F(acpi_pcc_ac_brightness_max_show, SINF_AC_MAX_BRIGHT);
PCC_SINF_READ_F(acpi_pcc_ac_brightness_min_show, SINF_AC_MIN_BRIGHT);
PCC_SINF_READ_F(acpi_pcc_ac_brightness_show, SINF_AC_CUR_BRIGHT);
PCC_SINF_READ_F(acpi_pcc_dc_brightness_max_show, SINF_DC_MAX_BRIGHT);
PCC_SINF_READ_F(acpi_pcc_dc_brightness_min_show, SINF_DC_MIN_BRIGHT);
PCC_SINF_READ_F(acpi_pcc_dc_brightness_show, SINF_DC_CUR_BRIGHT);
PCC_SINF_READ_F(acpi_pcc_brightness_show, SINF_AC_CUR_BRIGHT);
PCC_SINF_READ_F(acpi_pcc_mute_show, SINF_MUTE);
static int acpi_pcc_sticky_key_show(struct seq_file *seq, void *offset)
{
struct acpi_hotkey *hotkey = seq->private;
ACPI_FUNCTION_TRACE("acpi_pcc_sticky_key_show");
if (!hotkey || !hotkey->device) {
return_VALUE(0);
}
seq_printf(seq, "%d\n", hotkey->sticky_mode);
return_VALUE(0);
}
static int acpi_pcc_keyinput_show(struct seq_file *seq, void *offset)
{
struct acpi_hotkey *hotkey = (struct acpi_hotkey *) seq->private;
struct input_dev *hotk_input_dev = hotkey->input_dev;
struct pcc_keyinput *keyinput = input_get_drvdata(hotk_input_dev);
ACPI_FUNCTION_TRACE("acpi_pcc_keyinput_show");
seq_printf(seq, "%d\n", keyinput->key_mode);
return_VALUE(0);
}
static int acpi_pcc_version_show(struct seq_file *seq, void *offset)
{
struct acpi_hotkey *hotkey = (struct acpi_hotkey *) seq->private;
ACPI_FUNCTION_TRACE("acpi_pcc_version_show");
if (!hotkey || !hotkey->device)
return 0;
seq_printf(seq, "%s version %s\n", ACPI_PCC_DRIVER_NAME, ACPI_PCC_VERSION);
seq_printf(seq, "%li functions\n", hotkey->num_sifr);
return_VALUE(0);
}
/* write methods */
static ssize_t acpi_pcc_write_single_flag (struct file *file,
const char __user *buffer,
size_t count,
int sinf_func)
{
struct seq_file *seq = file->private_data;
struct acpi_hotkey *hotkey = seq->private;
char write_string[PROC_STR_MAX_LEN];
u32 val;
ACPI_FUNCTION_TRACE("acpi_pcc_write_single_flag");
if (!hotkey || (count > sizeof(write_string) - 1)) {
return_VALUE(-EINVAL);
}
if (copy_from_user(write_string, buffer, count)) {
return_VALUE(-EFAULT);
}
write_string[count] = '\0';
if (sscanf(write_string, "%i", &val) == 1 && (val == 0 || val == 1)) {
acpi_pcc_write_sset(hotkey, sinf_func, val);
}
return_VALUE(count);
}
static unsigned long acpi_pcc_write_brightness(struct file *file, const char __user *buffer,
size_t count,
int min_index, int max_index,
int cur_index)
{
struct seq_file *seq = (struct seq_file *)file->private_data;
struct acpi_hotkey *hotkey = (struct acpi_hotkey *)seq->private;
char write_string[PROC_STR_MAX_LEN];
u32 bright;
u32* sinf = kmalloc(sizeof(u32) * (hotkey->num_sifr + 1), GFP_KERNEL);
ACPI_FUNCTION_TRACE("acpi_pcc_write_brightness");
if (!hotkey || (count > sizeof(write_string) - 1))
return_VALUE(-EINVAL);
if (!sinf) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Couldn't allocate %li bytes\n",
sizeof(u32) * hotkey->num_sifr));
return_VALUE(-EFAULT);
}
if (copy_from_user(write_string, buffer, count))
return_VALUE(-EFAULT);
write_string[count] = '\0';
if (!acpi_pcc_retrieve_biosdata(hotkey, sinf)) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Couldn't retrieve BIOS data\n"));
goto end;
}
if (sscanf(write_string, "%i", &bright) == 1 &&
bright >= sinf[min_index] && bright <= sinf[max_index]) {
acpi_pcc_write_sset(hotkey, cur_index, bright);
}
end:
kfree(sinf);
return_VALUE(count);
}
static ssize_t acpi_pcc_write_ac_brightness(struct file *file, const char __user *buffer,
size_t count, loff_t *ppos)
{
return acpi_pcc_write_brightness(file, buffer, count, SINF_AC_MIN_BRIGHT,
SINF_AC_MAX_BRIGHT,
SINF_AC_CUR_BRIGHT);
}
static ssize_t acpi_pcc_write_dc_brightness(struct file *file, const char __user *buffer,
size_t count, loff_t *ppos)
{
return acpi_pcc_write_brightness(file, buffer, count, SINF_DC_MIN_BRIGHT,
SINF_DC_MAX_BRIGHT,
SINF_DC_CUR_BRIGHT);
}
static ssize_t acpi_pcc_write_no_brightness(struct file *file, const char __user *buffer,
size_t count, loff_t *ppos)
{
return acpi_pcc_write_brightness(file, buffer, count, SINF_AC_MIN_BRIGHT,
SINF_AC_MAX_BRIGHT,
SINF_AC_CUR_BRIGHT);
}
static ssize_t acpi_pcc_write_mute (struct file *file,
const char __user *buffer,
size_t count, loff_t *ppos)
{
return acpi_pcc_write_single_flag(file, buffer, count, SINF_MUTE);
}
static ssize_t acpi_pcc_write_sticky_key (struct file *file,
const char __user *buffer,
size_t count, loff_t *ppos)
{
return acpi_pcc_write_single_flag(file, buffer, count, SINF_STICKY_KEY);
}
static ssize_t acpi_pcc_write_keyinput(struct file *file, const char __user *buffer,
size_t count, loff_t *ppos)
{
struct seq_file *seq = (struct seq_file *)file->private_data;
struct acpi_hotkey *hotkey = (struct acpi_hotkey *)seq->private;
struct pcc_keyinput *keyinput;
char write_string[PROC_STR_MAX_LEN];
int key_mode;
ACPI_FUNCTION_TRACE("acpi_pcc_write_keyinput");
if (!hotkey || (count > sizeof(write_string) - 1))
return_VALUE(-EINVAL);
if (copy_from_user(write_string, buffer, count))
return_VALUE(-EFAULT);
write_string[count] = '\0';
if (sscanf(write_string, "%i", &key_mode) == 1 && (key_mode == 0 || key_mode == 1)) {
keyinput = (struct pcc_keyinput *)input_get_drvdata(hotkey->input_dev);
keyinput->key_mode = key_mode;
}
return_VALUE(count);
}
/* --------------------------------------------------------------------------
hotkey driver
-------------------------------------------------------------------------- */
static void acpi_pcc_generete_keyinput(struct acpi_hotkey *hotkey)
{
struct input_dev *hotk_input_dev = hotkey->input_dev;
struct pcc_keyinput *keyinput = input_get_drvdata(hotk_input_dev);
int hinf = hotkey->status;
int key_code, hkey_num;
const int key_map[] = {
/* 0 */ -1,
/* 1 */ KEY_BRIGHTNESSDOWN,
/* 2 */ KEY_BRIGHTNESSUP,
/* 3 */ -1, /* vga/lcd switch event is not occur on hotkey driver. */
/* 4 */ KEY_MUTE,
/* 5 */ KEY_VOLUMEDOWN,
/* 6 */ KEY_VOLUMEUP,
/* 7 */ KEY_SLEEP,
/* 8 */ -1, /* Change CPU boost: do nothing */
/* 9 */ KEY_BATT,
/* 10 */ KEY_SUSPEND,
};
ACPI_FUNCTION_TRACE("acpi_pcc_generete_keyinput");
if (keyinput->key_mode == 0) { return_VOID; }
hkey_num = hinf & 0xf;
if (( 0 > hkey_num ) ||
(hkey_num > ARRAY_SIZE(key_map))) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
"hotkey number out of range: %d\n",
hkey_num));
return_VOID;
}
key_code = key_map[hkey_num];
if (key_code != -1) {
int pushed = (hinf & 0x80) ? TRUE : FALSE;
input_report_key(hotk_input_dev, key_code, pushed);
input_sync(hotk_input_dev);
}
}
static int acpi_pcc_hotkey_get_key(struct acpi_hotkey *hotkey)
{
unsigned long result;
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE("acpi_pcc_hotkey_get_key");
status = acpi_evaluate_integer(hotkey->handle, METHOD_HKEY_QUERY, NULL, &result);
if (likely(ACPI_SUCCESS(status))) {
hotkey->status = result;
} else {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "error getting hotkey status\n"));
}
return_VALUE(status == AE_OK);
}
void acpi_pcc_hotkey_notify(acpi_handle handle, u32 event, void *data)
{
struct acpi_hotkey *hotkey = (struct acpi_hotkey *) data;
ACPI_FUNCTION_TRACE("acpi_pcc_hotkey_notify");
switch(event) {
case HKEY_NOTIFY:
if (acpi_pcc_hotkey_get_key(hotkey)) {
/* generate event like '"pcc HKEY 00000080 00000084"' when Fn+F4 pressed */
acpi_bus_generate_proc_event(hotkey->device, event, hotkey->status);
}
acpi_pcc_generete_keyinput(hotkey);
break;
default:
/* nothing to do */
break;
}
return_VOID;
}
/* --------------------------------------------------------------------------
FS Interface (/proc)
-------------------------------------------------------------------------- */
/* oepn proc file fs*/
SEQ_OPEN_FS(acpi_pcc_dc_brightness_open_fs, acpi_pcc_dc_brightness_show);
SEQ_OPEN_FS(acpi_pcc_numbatteries_open_fs, acpi_pcc_numbatteries_show);
SEQ_OPEN_FS(acpi_pcc_lcdtype_open_fs, acpi_pcc_lcdtype_show);
SEQ_OPEN_FS(acpi_pcc_ac_brightness_max_open_fs, acpi_pcc_ac_brightness_max_show);
SEQ_OPEN_FS(acpi_pcc_ac_brightness_min_open_fs, acpi_pcc_ac_brightness_min_show);
SEQ_OPEN_FS(acpi_pcc_ac_brightness_open_fs, acpi_pcc_ac_brightness_show);
SEQ_OPEN_FS(acpi_pcc_dc_brightness_max_open_fs, acpi_pcc_dc_brightness_max_show);
SEQ_OPEN_FS(acpi_pcc_dc_brightness_min_open_fs, acpi_pcc_dc_brightness_min_show);
SEQ_OPEN_FS(acpi_pcc_brightness_open_fs, acpi_pcc_brightness_show);
SEQ_OPEN_FS(acpi_pcc_mute_open_fs, acpi_pcc_mute_show);
SEQ_OPEN_FS(acpi_pcc_version_open_fs, acpi_pcc_version_show);
SEQ_OPEN_FS(acpi_pcc_keyinput_open_fs, acpi_pcc_keyinput_show);
SEQ_OPEN_FS(acpi_pcc_sticky_key_open_fs, acpi_pcc_sticky_key_show);
typedef struct file_operations fops_t;
static fops_t acpi_pcc_numbatteries_fops = SEQ_FILEOPS_R (acpi_pcc_numbatteries_open_fs);
static fops_t acpi_pcc_lcdtype_fops = SEQ_FILEOPS_R (acpi_pcc_lcdtype_open_fs);
static fops_t acpi_pcc_mute_fops = SEQ_FILEOPS_RW(acpi_pcc_mute_open_fs, acpi_pcc_write_mute);
static fops_t acpi_pcc_ac_brightness_fops = SEQ_FILEOPS_RW(acpi_pcc_ac_brightness_open_fs, acpi_pcc_write_ac_brightness);
static fops_t acpi_pcc_ac_brightness_max_fops = SEQ_FILEOPS_R(acpi_pcc_ac_brightness_max_open_fs);
static fops_t acpi_pcc_ac_brightness_min_fops = SEQ_FILEOPS_R(acpi_pcc_ac_brightness_min_open_fs);
static fops_t acpi_pcc_dc_brightness_fops = SEQ_FILEOPS_RW(acpi_pcc_dc_brightness_open_fs, acpi_pcc_write_dc_brightness);
static fops_t acpi_pcc_dc_brightness_max_fops = SEQ_FILEOPS_R(acpi_pcc_dc_brightness_max_open_fs);
static fops_t acpi_pcc_dc_brightness_min_fops = SEQ_FILEOPS_R(acpi_pcc_dc_brightness_min_open_fs);
static fops_t acpi_pcc_brightness_fops = SEQ_FILEOPS_RW(acpi_pcc_brightness_open_fs, acpi_pcc_write_no_brightness);
static fops_t acpi_pcc_sticky_key_fops = SEQ_FILEOPS_RW(acpi_pcc_sticky_key_open_fs, acpi_pcc_write_sticky_key);
static fops_t acpi_pcc_keyinput_fops = SEQ_FILEOPS_RW(acpi_pcc_keyinput_open_fs, acpi_pcc_write_keyinput);
static fops_t acpi_pcc_version_fops = SEQ_FILEOPS_R (acpi_pcc_version_open_fs);
typedef struct _ProcItem
{
const char* name;
struct file_operations *fops;
mode_t flag;
} ProcItem;
/* Note: These functions map *exactly* to the SINF/SSET functions */
ProcItem pcc_proc_items_sifr[] =
{
{ "num_batteries", &acpi_pcc_numbatteries_fops, S_IRUGO },
{ "lcd_type", &acpi_pcc_lcdtype_fops, S_IRUGO },
{ "ac_brightness_max" , &acpi_pcc_ac_brightness_max_fops,S_IRUGO },
{ "ac_brightness_min" , &acpi_pcc_ac_brightness_min_fops,S_IRUGO },
{ "ac_brightness" , &acpi_pcc_ac_brightness_fops, S_IFREG | S_IRUGO | S_IWUSR },
{ "dc_brightness_max" , &acpi_pcc_dc_brightness_max_fops,S_IRUGO },
{ "dc_brightness_min" , &acpi_pcc_dc_brightness_min_fops,S_IRUGO },
{ "dc_brightness" , &acpi_pcc_dc_brightness_fops, S_IFREG | S_IRUGO | S_IWUSR },
{ "brightness" , &acpi_pcc_brightness_fops, S_IFREG | S_IRUGO | S_IWUSR },
{ "mute", &acpi_pcc_mute_fops, S_IFREG | S_IRUGO | S_IWUSR },
{ NULL, NULL, 0 },
};
ProcItem pcc_proc_items[] =
{
{ "sticky_key", &acpi_pcc_sticky_key_fops, S_IFREG | S_IRUGO | S_IWUSR },
{ "keyinput", &acpi_pcc_keyinput_fops, S_IFREG | S_IRUGO | S_IWUSR },
{ "version", &acpi_pcc_version_fops, S_IRUGO },
{ NULL, NULL, 0 },
};
static int acpi_pcc_add_device(struct acpi_device *device,
ProcItem *proc_items,
int num)
{
struct proc_dir_entry* proc;
ProcItem* item;
int i;
struct acpi_hotkey *hotkey = (struct acpi_hotkey*)acpi_driver_data(device);
for (item = proc_items, i = 0; item->name && i < num; ++item, ++i) {
proc = create_proc_entry(item->name, item->flag, hotkey->proc_dir_entry);
if (likely(proc)) {
proc->proc_fops = item->fops;
proc->data = hotkey;
proc->owner = THIS_MODULE;
} else {
while (i-- > 0) {
item--;
remove_proc_entry(item->name, hotkey->proc_dir_entry);
}
return -ENODEV;
}
}
return 0;
}
static int acpi_pcc_proc_init(struct acpi_device *device)
{
struct proc_dir_entry* acpi_pcc_dir;
struct acpi_hotkey *hotkey = (struct acpi_hotkey*)acpi_driver_data(device);
acpi_status status;
ACPI_FUNCTION_TRACE("acpi_pcc_proc_init");
acpi_pcc_dir = proc_mkdir(PROC_PCC, acpi_root_dir);
if (unlikely(!acpi_pcc_dir)) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Couldn't create dir in /proc\n"));
return_VALUE(-ENODEV);
}
acpi_pcc_dir->owner = THIS_MODULE;
hotkey->proc_dir_entry = acpi_pcc_dir;
status = acpi_pcc_add_device(device, pcc_proc_items_sifr, hotkey->num_sifr);
status |= acpi_pcc_add_device(device, pcc_proc_items, sizeof(pcc_proc_items)/sizeof(ProcItem));
if (unlikely(status)) {
remove_proc_entry(PROC_PCC, acpi_root_dir);
hotkey->proc_dir_entry = NULL;
return_VALUE(-ENODEV);
}
return_VALUE(status);
}
static void acpi_pcc_remove_device(struct acpi_device *device,
ProcItem *proc_items,
int num)
{
struct acpi_hotkey *hotkey = (struct acpi_hotkey*)acpi_driver_data(device);
ProcItem* item;
int i;
for (item = proc_items, i = 0; item->name != NULL && i < num; ++item, ++i) {
remove_proc_entry(item->name, hotkey->proc_dir_entry);
}
return;
}
/* --------------------------------------------------------------------------
input init
-------------------------------------------------------------------------- */
static int acpi_pcc_init_input(struct acpi_hotkey *hotkey)
{
struct input_dev *hotk_input_dev;
struct pcc_keyinput *pcc_keyinput;
ACPI_FUNCTION_TRACE("acpi_pcc_init_input");
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
hotk_input_dev = input_allocate_device();
if (!hotk_input_dev) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Couldn't allocate input device for hotkey"));
return_VALUE(-ENOMEM);
}
#else
hotk_input_dev = kcalloc(1, sizeof(struct input_dev),GFP_KERNEL);
if (hotk_input_dev == NULL) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Couldn't allocate mem for hotkey"));
return_VALUE(-ENOMEM);
}
#endif
pcc_keyinput = kcalloc(1,sizeof(struct pcc_keyinput),GFP_KERNEL);
if (pcc_keyinput == NULL) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Couldn't allocate mem for hotkey"));
input_unregister_device(hotk_input_dev);
return_VALUE(-ENOMEM);
}
hotk_input_dev->evbit[0] = BIT(EV_KEY);
set_bit(KEY_BRIGHTNESSDOWN, hotk_input_dev->keybit);
set_bit(KEY_BRIGHTNESSUP, hotk_input_dev->keybit);
set_bit(KEY_MUTE, hotk_input_dev->keybit);
set_bit(KEY_VOLUMEDOWN, hotk_input_dev->keybit);
set_bit(KEY_VOLUMEUP, hotk_input_dev->keybit);
set_bit(KEY_SLEEP, hotk_input_dev->keybit);
set_bit(KEY_BATT, hotk_input_dev->keybit);
set_bit(KEY_SUSPEND, hotk_input_dev->keybit);
hotk_input_dev->name = ACPI_PCC_DRIVER_NAME;
hotk_input_dev->phys = ACPI_PCC_INPUT_PHYS;
hotk_input_dev->id.bustype = 0x1a; /* XXX FIXME: BUS_I8042? */
hotk_input_dev->id.vendor = 0x0001;
hotk_input_dev->id.product = 0x0001;
hotk_input_dev->id.version = 0x0100;
pcc_keyinput->key_mode = 1; /* default on */
pcc_keyinput->hotkey = hotkey;
input_set_drvdata(hotk_input_dev, pcc_keyinput);
hotkey->input_dev = hotk_input_dev;
input_register_device(hotk_input_dev);
return_VALUE(0);
}
/* --------------------------------------------------------------------------
module init
-------------------------------------------------------------------------- */
static int acpi_pcc_hotkey_resume(struct acpi_device *device)
{
struct acpi_hotkey *hotkey = acpi_driver_data(device);
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE("acpi_pcc_hotkey_resume");
if (device == NULL || hotkey == NULL) { return_VALUE(-EINVAL); }
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Sticky mode restore: %d\n", hotkey->sticky_mode));
status = acpi_pcc_write_sset(hotkey, SINF_STICKY_KEY, hotkey->sticky_mode);
return_VALUE(status == AE_OK ? 0 : -EINVAL);
}
static int acpi_pcc_hotkey_add (struct acpi_device *device)
{
acpi_status status = AE_OK;
struct acpi_hotkey *hotkey = NULL;
int num_sifr, result;
ACPI_FUNCTION_TRACE("acpi_pcc_hotkey_add");
if (!device) {
return_VALUE(-EINVAL);
}
num_sifr = acpi_pcc_get_sqty(device);
if (num_sifr > 255) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "num_sifr too large"));
return_VALUE(-ENODEV);
}
hotkey = kmalloc(sizeof(struct acpi_hotkey), GFP_KERNEL);
if (!hotkey) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Couldn't allocate mem for hotkey"));
return_VALUE(-ENOMEM);
}
memset(hotkey, 0, sizeof(struct acpi_hotkey));
hotkey->device = device;
hotkey->handle = device->handle;
hotkey->num_sifr = num_sifr;
acpi_driver_data(device) = hotkey;
strcpy(acpi_device_name(device), ACPI_PCC_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_PCC_CLASS);
status = acpi_install_notify_handler (
hotkey->handle,
ACPI_DEVICE_NOTIFY,
acpi_pcc_hotkey_notify,
hotkey);
if (ACPI_FAILURE(status)) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error installing notify handler\n"));
kfree(hotkey);
return_VALUE(-ENODEV);
}
result = acpi_pcc_init_input(hotkey);
if (result) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error installing keyinput handler\n"));
kfree(hotkey);
return_VALUE(result);
}
return_VALUE(acpi_pcc_proc_init(device));
}
static int __init acpi_pcc_init(void)
{
int result = 0;
ACPI_FUNCTION_TRACE("acpi_pcc_init");
if (acpi_disabled) {
return_VALUE(-ENODEV);
}
result = acpi_bus_register_driver(&acpi_pcc_driver);
if (result < 0) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error registering hotkey driver\n"));
return_VALUE(-ENODEV);
}
return_VALUE(0);
}
module_init(acpi_pcc_init);
static int acpi_pcc_hotkey_remove(struct acpi_device *device, int type)
{
acpi_status status = AE_OK;
struct acpi_hotkey *hotkey = acpi_driver_data(device);
ACPI_FUNCTION_TRACE("acpi_pcc_hotkey_remove");
if (!device || !hotkey)
return_VALUE(-EINVAL);
if (hotkey->proc_dir_entry) {
acpi_pcc_remove_device(device, pcc_proc_items_sifr, hotkey->num_sifr);
acpi_pcc_remove_device(device, pcc_proc_items, sizeof(pcc_proc_items)/sizeof(ProcItem));
remove_proc_entry(PROC_PCC, acpi_root_dir);
}
status = acpi_remove_notify_handler(hotkey->handle,
ACPI_DEVICE_NOTIFY, acpi_pcc_hotkey_notify);
if (ACPI_FAILURE(status))
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error removing notify handler\n"));
input_unregister_device(hotkey->input_dev);
kfree(hotkey);
return_VALUE(status == AE_OK);
}
static void __exit acpi_pcc_exit(void)
{
ACPI_FUNCTION_TRACE("acpi_pcc_exit");
acpi_bus_unregister_driver(&acpi_pcc_driver);
return_VOID;
}
module_exit(acpi_pcc_exit);