[ACPI] restore /proc/acpi/button/ (ala 2.6.12)
Signed-off-by Alexey Starikovskiy <alexey.y.starikovskiy@intel.com> Signed-off-by Len Brown <len.brown@intel.com>
This commit is contained in:
Alexey Starikovskiy
Len Brown
Родитель
7b15f5e7bb
Коммит
b34a8030ee
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@ -26,6 +26,9 @@
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <acpi/acpi_bus.h>
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#include <acpi/acpi_drivers.h>
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@ -33,6 +36,9 @@
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#define ACPI_BUTTON_COMPONENT 0x00080000
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#define ACPI_BUTTON_DRIVER_NAME "ACPI Button Driver"
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#define ACPI_BUTTON_CLASS "button"
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#define ACPI_BUTTON_FILE_INFO "info"
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#define ACPI_BUTTON_FILE_STATE "state"
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#define ACPI_BUTTON_TYPE_UNKNOWN 0x00
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#define ACPI_BUTTON_NOTIFY_STATUS 0x80
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#define ACPI_BUTTON_SUBCLASS_POWER "power"
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@ -64,6 +70,8 @@ MODULE_LICENSE("GPL");
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static int acpi_button_add (struct acpi_device *device);
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static int acpi_button_remove (struct acpi_device *device, int type);
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static int acpi_button_info_open_fs(struct inode *inode, struct file *file);
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static int acpi_button_state_open_fs(struct inode *inode, struct file *file);
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static struct acpi_driver acpi_button_driver = {
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.name = ACPI_BUTTON_DRIVER_NAME,
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@ -82,6 +90,179 @@ struct acpi_button {
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unsigned long pushed;
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};
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static struct file_operations acpi_button_info_fops = {
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.open = acpi_button_info_open_fs,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static struct file_operations acpi_button_state_fops = {
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.open = acpi_button_state_open_fs,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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/* --------------------------------------------------------------------------
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FS Interface (/proc)
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-------------------------------------------------------------------------- */
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static struct proc_dir_entry *acpi_button_dir;
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static int acpi_button_info_seq_show(struct seq_file *seq, void *offset)
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{
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struct acpi_button *button = (struct acpi_button *) seq->private;
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ACPI_FUNCTION_TRACE("acpi_button_info_seq_show");
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if (!button || !button->device)
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return_VALUE(0);
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seq_printf(seq, "type: %s\n",
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acpi_device_name(button->device));
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return_VALUE(0);
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}
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static int acpi_button_info_open_fs(struct inode *inode, struct file *file)
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{
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return single_open(file, acpi_button_info_seq_show, PDE(inode)->data);
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}
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static int acpi_button_state_seq_show(struct seq_file *seq, void *offset)
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{
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struct acpi_button *button = (struct acpi_button *) seq->private;
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acpi_status status;
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unsigned long state;
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ACPI_FUNCTION_TRACE("acpi_button_state_seq_show");
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if (!button || !button->device)
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return_VALUE(0);
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status = acpi_evaluate_integer(button->handle,"_LID",NULL,&state);
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if (ACPI_FAILURE(status)) {
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seq_printf(seq, "state: unsupported\n");
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}
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else{
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seq_printf(seq, "state: %s\n", (state ? "open" : "closed"));
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}
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return_VALUE(0);
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}
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static int acpi_button_state_open_fs(struct inode *inode, struct file *file)
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{
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return single_open(file, acpi_button_state_seq_show, PDE(inode)->data);
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}
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static struct proc_dir_entry *acpi_power_dir;
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static struct proc_dir_entry *acpi_sleep_dir;
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static struct proc_dir_entry *acpi_lid_dir;
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static int
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acpi_button_add_fs (
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struct acpi_device *device)
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{
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struct proc_dir_entry *entry = NULL;
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struct acpi_button *button = NULL;
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ACPI_FUNCTION_TRACE("acpi_button_add_fs");
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if (!device || !acpi_driver_data(device))
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return_VALUE(-EINVAL);
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button = acpi_driver_data(device);
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switch (button->type) {
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case ACPI_BUTTON_TYPE_POWER:
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case ACPI_BUTTON_TYPE_POWERF:
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if (!acpi_power_dir)
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acpi_power_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER,
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acpi_button_dir);
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entry = acpi_power_dir;
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break;
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case ACPI_BUTTON_TYPE_SLEEP:
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case ACPI_BUTTON_TYPE_SLEEPF:
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if (!acpi_sleep_dir)
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acpi_sleep_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP,
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acpi_button_dir);
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entry = acpi_sleep_dir;
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break;
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case ACPI_BUTTON_TYPE_LID:
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if (!acpi_lid_dir)
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acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID,
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acpi_button_dir);
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entry = acpi_lid_dir;
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break;
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}
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if (!entry)
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return_VALUE(-ENODEV);
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entry->owner = THIS_MODULE;
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acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry);
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if (!acpi_device_dir(device))
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return_VALUE(-ENODEV);
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acpi_device_dir(device)->owner = THIS_MODULE;
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/* 'info' [R] */
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entry = create_proc_entry(ACPI_BUTTON_FILE_INFO,
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S_IRUGO, acpi_device_dir(device));
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if (!entry)
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"Unable to create '%s' fs entry\n",
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ACPI_BUTTON_FILE_INFO));
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else {
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entry->proc_fops = &acpi_button_info_fops;
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entry->data = acpi_driver_data(device);
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entry->owner = THIS_MODULE;
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}
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/* show lid state [R] */
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if (button->type == ACPI_BUTTON_TYPE_LID) {
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entry = create_proc_entry(ACPI_BUTTON_FILE_STATE,
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S_IRUGO, acpi_device_dir(device));
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if (!entry)
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"Unable to create '%s' fs entry\n",
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ACPI_BUTTON_FILE_INFO));
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else {
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entry->proc_fops = &acpi_button_state_fops;
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entry->data = acpi_driver_data(device);
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entry->owner = THIS_MODULE;
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}
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}
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return_VALUE(0);
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}
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static int
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acpi_button_remove_fs (
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struct acpi_device *device)
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{
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struct acpi_button *button = NULL;
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ACPI_FUNCTION_TRACE("acpi_button_remove_fs");
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button = acpi_driver_data(device);
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if (acpi_device_dir(device)) {
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if (button->type == ACPI_BUTTON_TYPE_LID)
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remove_proc_entry(ACPI_BUTTON_FILE_STATE,
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acpi_device_dir(device));
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remove_proc_entry(ACPI_BUTTON_FILE_INFO,
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acpi_device_dir(device));
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remove_proc_entry(acpi_device_bid(device),
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acpi_device_dir(device)->parent);
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acpi_device_dir(device) = NULL;
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}
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return_VALUE(0);
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}
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/* --------------------------------------------------------------------------
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Driver Interface
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-------------------------------------------------------------------------- */
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@ -121,7 +302,8 @@ acpi_button_notify_fixed (
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ACPI_FUNCTION_TRACE("acpi_button_notify_fixed");
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BUG_ON(!button);
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if (!button)
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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acpi_button_notify(button->handle, ACPI_BUTTON_NOTIFY_STATUS, button);
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@ -197,6 +379,10 @@ acpi_button_add (
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goto end;
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}
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result = acpi_button_add_fs(device);
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if (result)
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goto end;
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switch (button->type) {
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case ACPI_BUTTON_TYPE_POWERF:
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status = acpi_install_fixed_event_handler (
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@ -240,6 +426,7 @@ acpi_button_add (
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end:
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if (result) {
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acpi_button_remove_fs(device);
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kfree(button);
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}
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@ -280,6 +467,8 @@ acpi_button_remove (struct acpi_device *device, int type)
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"Error removing notify handler\n"));
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acpi_button_remove_fs(device);
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kfree(button);
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return_VALUE(0);
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@ -293,14 +482,20 @@ acpi_button_init (void)
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ACPI_FUNCTION_TRACE("acpi_button_init");
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acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
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if (!acpi_button_dir)
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return_VALUE(-ENODEV);
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acpi_button_dir->owner = THIS_MODULE;
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result = acpi_bus_register_driver(&acpi_button_driver);
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if (result < 0) {
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remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
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return_VALUE(-ENODEV);
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}
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return_VALUE(0);
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}
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static void __exit
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acpi_button_exit (void)
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{
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@ -308,8 +503,17 @@ acpi_button_exit (void)
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acpi_bus_unregister_driver(&acpi_button_driver);
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if (acpi_power_dir)
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remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER, acpi_button_dir);
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if (acpi_sleep_dir)
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remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP, acpi_button_dir);
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if (acpi_lid_dir)
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remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
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remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
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return_VOID;
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}
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module_init(acpi_button_init);
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module_exit(acpi_button_exit);
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