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[ACPI] restore /proc/acpi/button/ (ala 2.6.12)
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Signed-off-by Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
Signed-off-by Len Brown <len.brown@intel.com>
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Alexey Starikovskiy authored and Len Brown committed Aug 3, 2005
1 parent 7b15f5e commit b34a803
Showing 1 changed file with 205 additions and 1 deletion.
206 changes: 205 additions & 1 deletion drivers/acpi/button.c
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Original file line number Diff line number Diff line change
Expand Up @@ -26,13 +26,19 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>


#define ACPI_BUTTON_COMPONENT 0x00080000
#define ACPI_BUTTON_DRIVER_NAME "ACPI Button Driver"
#define ACPI_BUTTON_CLASS "button"
#define ACPI_BUTTON_FILE_INFO "info"
#define ACPI_BUTTON_FILE_STATE "state"
#define ACPI_BUTTON_TYPE_UNKNOWN 0x00
#define ACPI_BUTTON_NOTIFY_STATUS 0x80

#define ACPI_BUTTON_SUBCLASS_POWER "power"
Expand Down Expand Up @@ -64,6 +70,8 @@ MODULE_LICENSE("GPL");

static int acpi_button_add (struct acpi_device *device);
static int acpi_button_remove (struct acpi_device *device, int type);
static int acpi_button_info_open_fs(struct inode *inode, struct file *file);
static int acpi_button_state_open_fs(struct inode *inode, struct file *file);

static struct acpi_driver acpi_button_driver = {
.name = ACPI_BUTTON_DRIVER_NAME,
Expand All @@ -82,6 +90,179 @@ struct acpi_button {
unsigned long pushed;
};

static struct file_operations acpi_button_info_fops = {
.open = acpi_button_info_open_fs,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};

static struct file_operations acpi_button_state_fops = {
.open = acpi_button_state_open_fs,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
/* --------------------------------------------------------------------------
FS Interface (/proc)
-------------------------------------------------------------------------- */

static struct proc_dir_entry *acpi_button_dir;

static int acpi_button_info_seq_show(struct seq_file *seq, void *offset)
{
struct acpi_button *button = (struct acpi_button *) seq->private;

ACPI_FUNCTION_TRACE("acpi_button_info_seq_show");

if (!button || !button->device)
return_VALUE(0);

seq_printf(seq, "type: %s\n",
acpi_device_name(button->device));

return_VALUE(0);
}

static int acpi_button_info_open_fs(struct inode *inode, struct file *file)
{
return single_open(file, acpi_button_info_seq_show, PDE(inode)->data);
}

static int acpi_button_state_seq_show(struct seq_file *seq, void *offset)
{
struct acpi_button *button = (struct acpi_button *) seq->private;
acpi_status status;
unsigned long state;

ACPI_FUNCTION_TRACE("acpi_button_state_seq_show");

if (!button || !button->device)
return_VALUE(0);

status = acpi_evaluate_integer(button->handle,"_LID",NULL,&state);
if (ACPI_FAILURE(status)) {
seq_printf(seq, "state: unsupported\n");
}
else{
seq_printf(seq, "state: %s\n", (state ? "open" : "closed"));
}

return_VALUE(0);
}

static int acpi_button_state_open_fs(struct inode *inode, struct file *file)
{
return single_open(file, acpi_button_state_seq_show, PDE(inode)->data);
}

static struct proc_dir_entry *acpi_power_dir;
static struct proc_dir_entry *acpi_sleep_dir;
static struct proc_dir_entry *acpi_lid_dir;

static int
acpi_button_add_fs (
struct acpi_device *device)
{
struct proc_dir_entry *entry = NULL;
struct acpi_button *button = NULL;

ACPI_FUNCTION_TRACE("acpi_button_add_fs");

if (!device || !acpi_driver_data(device))
return_VALUE(-EINVAL);

button = acpi_driver_data(device);

switch (button->type) {
case ACPI_BUTTON_TYPE_POWER:
case ACPI_BUTTON_TYPE_POWERF:
if (!acpi_power_dir)
acpi_power_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER,
acpi_button_dir);
entry = acpi_power_dir;
break;
case ACPI_BUTTON_TYPE_SLEEP:
case ACPI_BUTTON_TYPE_SLEEPF:
if (!acpi_sleep_dir)
acpi_sleep_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP,
acpi_button_dir);
entry = acpi_sleep_dir;
break;
case ACPI_BUTTON_TYPE_LID:
if (!acpi_lid_dir)
acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID,
acpi_button_dir);
entry = acpi_lid_dir;
break;
}

if (!entry)
return_VALUE(-ENODEV);
entry->owner = THIS_MODULE;

acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry);
if (!acpi_device_dir(device))
return_VALUE(-ENODEV);
acpi_device_dir(device)->owner = THIS_MODULE;

/* 'info' [R] */
entry = create_proc_entry(ACPI_BUTTON_FILE_INFO,
S_IRUGO, acpi_device_dir(device));
if (!entry)
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
"Unable to create '%s' fs entry\n",
ACPI_BUTTON_FILE_INFO));
else {
entry->proc_fops = &acpi_button_info_fops;
entry->data = acpi_driver_data(device);
entry->owner = THIS_MODULE;
}

/* show lid state [R] */
if (button->type == ACPI_BUTTON_TYPE_LID) {
entry = create_proc_entry(ACPI_BUTTON_FILE_STATE,
S_IRUGO, acpi_device_dir(device));
if (!entry)
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
"Unable to create '%s' fs entry\n",
ACPI_BUTTON_FILE_INFO));
else {
entry->proc_fops = &acpi_button_state_fops;
entry->data = acpi_driver_data(device);
entry->owner = THIS_MODULE;
}
}

return_VALUE(0);
}


static int
acpi_button_remove_fs (
struct acpi_device *device)
{
struct acpi_button *button = NULL;

ACPI_FUNCTION_TRACE("acpi_button_remove_fs");

button = acpi_driver_data(device);
if (acpi_device_dir(device)) {
if (button->type == ACPI_BUTTON_TYPE_LID)
remove_proc_entry(ACPI_BUTTON_FILE_STATE,
acpi_device_dir(device));
remove_proc_entry(ACPI_BUTTON_FILE_INFO,
acpi_device_dir(device));

remove_proc_entry(acpi_device_bid(device),
acpi_device_dir(device)->parent);
acpi_device_dir(device) = NULL;
}

return_VALUE(0);
}


/* --------------------------------------------------------------------------
Driver Interface
-------------------------------------------------------------------------- */
Expand Down Expand Up @@ -121,7 +302,8 @@ acpi_button_notify_fixed (

ACPI_FUNCTION_TRACE("acpi_button_notify_fixed");

BUG_ON(!button);
if (!button)
return_ACPI_STATUS(AE_BAD_PARAMETER);

acpi_button_notify(button->handle, ACPI_BUTTON_NOTIFY_STATUS, button);

Expand Down Expand Up @@ -197,6 +379,10 @@ acpi_button_add (
goto end;
}

result = acpi_button_add_fs(device);
if (result)
goto end;

switch (button->type) {
case ACPI_BUTTON_TYPE_POWERF:
status = acpi_install_fixed_event_handler (
Expand Down Expand Up @@ -240,6 +426,7 @@ acpi_button_add (

end:
if (result) {
acpi_button_remove_fs(device);
kfree(button);
}

Expand Down Expand Up @@ -280,6 +467,8 @@ acpi_button_remove (struct acpi_device *device, int type)
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
"Error removing notify handler\n"));

acpi_button_remove_fs(device);

kfree(button);

return_VALUE(0);
Expand All @@ -293,23 +482,38 @@ acpi_button_init (void)

ACPI_FUNCTION_TRACE("acpi_button_init");

acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
if (!acpi_button_dir)
return_VALUE(-ENODEV);
acpi_button_dir->owner = THIS_MODULE;
result = acpi_bus_register_driver(&acpi_button_driver);
if (result < 0) {
remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
return_VALUE(-ENODEV);
}

return_VALUE(0);
}


static void __exit
acpi_button_exit (void)
{
ACPI_FUNCTION_TRACE("acpi_button_exit");

acpi_bus_unregister_driver(&acpi_button_driver);

if (acpi_power_dir)
remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER, acpi_button_dir);
if (acpi_sleep_dir)
remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP, acpi_button_dir);
if (acpi_lid_dir)
remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);

return_VOID;
}


module_init(acpi_button_init);
module_exit(acpi_button_exit);

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