+/*
+ * hotkey.c - ACPI Hotkey Driver ($Revision:$)
+ *
+ * Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * 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.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/proc_fs.h>
+#include <linux/sched.h>
+#include <linux/kmod.h>
+#include <linux/seq_file.h>
+#include <acpi/acpi_drivers.h>
+#include <acpi/acpi_bus.h>
+#include <asm/uaccess.h>
+
+#define HOTKEY_ACPI_VERSION "0.1"
+
+#define HOTKEY_PROC "hotkey"
+#define HOTKEY_EV_CONFIG "event_config"
+#define HOTKEY_PL_CONFIG "poll_config"
+#define HOTKEY_ACTION "action"
+#define HOTKEY_INFO "info"
+
+#define ACPI_HOTK_NAME "Generic Hotkey Driver"
+#define ACPI_HOTK_CLASS "Hotkey"
+#define ACPI_HOTK_DEVICE_NAME "Hotkey"
+#define ACPI_HOTK_HID "Unknown?"
+#define ACPI_HOTKEY_COMPONENT 0x20000000
+
+#define ACPI_HOTKEY_EVENT 0x1
+#define ACPI_HOTKEY_POLLING 0x2
+#define ACPI_UNDEFINED_EVENT 0xf
+
+#define MAX_CONFIG_RECORD_LEN 80
+#define MAX_NAME_PATH_LEN 80
+#define MAX_CALL_PARM 80
+
+#define IS_EVENT(e) 0xff /* ((e) & 0x40000000) */
+#define IS_POLL(e) 0xff /* (~((e) & 0x40000000)) */
+
+#define _COMPONENT ACPI_HOTKEY_COMPONENT
+ACPI_MODULE_NAME("acpi_hotkey")
+
+ MODULE_AUTHOR("luming.yu@intel.com");
+MODULE_DESCRIPTION(ACPI_HOTK_NAME);
+MODULE_LICENSE("GPL");
+
+/* standardized internal hotkey number/event */
+enum {
+ /* Video Extension event */
+ HK_EVENT_CYCLE_OUTPUT_DEVICE = 0x80,
+ HK_EVENT_OUTPUT_DEVICE_STATUS_CHANGE,
+ HK_EVENT_CYCLE_DISPLAY_OUTPUT,
+ HK_EVENT_NEXT_DISPLAY_OUTPUT,
+ HK_EVENT_PREVIOUS_DISPLAY_OUTPUT,
+ HK_EVENT_CYCLE_BRIGHTNESS,
+ HK_EVENT_INCREASE_BRIGHTNESS,
+ HK_EVENT_DECREASE_BRIGHTNESS,
+ HK_EVENT_ZERO_BRIGHTNESS,
+ HK_EVENT_DISPLAY_DEVICE_OFF,
+
+ /* Snd Card event */
+ HK_EVENT_VOLUME_MUTE,
+ HK_EVENT_VOLUME_INCLREASE,
+ HK_EVENT_VOLUME_DECREASE,
+
+ /* running state control */
+ HK_EVENT_ENTERRING_S3,
+ HK_EVENT_ENTERRING_S4,
+ HK_EVENT_ENTERRING_S5,
+};
+
+/* procdir we use */
+static struct proc_dir_entry *hotkey_proc_dir;
+static struct proc_dir_entry *hotkey_config;
+static struct proc_dir_entry *hotkey_poll_config;
+static struct proc_dir_entry *hotkey_action;
+static struct proc_dir_entry *hotkey_info;
+
+/* linkage for all type of hotkey */
+struct acpi_hotkey_link {
+ struct list_head entries;
+ int hotkey_type; /* event or polling based hotkey */
+ int hotkey_standard_num; /* standardized hotkey(event) number */
+};
+
+/* event based hotkey */
+struct acpi_event_hotkey {
+ struct acpi_hotkey_link hotkey_link;
+ int flag;
+ acpi_handle bus_handle; /* bus to install notify handler */
+ int external_hotkey_num; /* external hotkey/event number */
+ acpi_handle action_handle; /* acpi handle attached aml action method */
+ char *action_method; /* action method */
+};
+
+/*
+ * There are two ways to poll status
+ * 1. directy call read_xxx method, without any arguments passed in
+ * 2. call write_xxx method, with arguments passed in, you need
+ * the result is saved in acpi_polling_hotkey.poll_result.
+ * anthoer read command through polling interface.
+ *
+ */
+
+/* polling based hotkey */
+struct acpi_polling_hotkey {
+ struct acpi_hotkey_link hotkey_link;
+ int flag;
+ acpi_handle poll_handle; /* acpi handle attached polling method */
+ char *poll_method; /* poll method */
+ acpi_handle action_handle; /* acpi handle attached action method */
+ char *action_method; /* action method */
+ void *poll_result; /* polling_result */
+ struct proc_dir_entry *proc;
+};
+
+/* hotkey object union */
+union acpi_hotkey {
+ struct list_head entries;
+ struct acpi_hotkey_link link;
+ struct acpi_event_hotkey event_hotkey;
+ struct acpi_polling_hotkey poll_hotkey;
+};
+
+/* hotkey object list */
+struct acpi_hotkey_list {
+ struct list_head *entries;
+ int count;
+};
+
+static int auto_hotkey_add(struct acpi_device *device);
+static int auto_hotkey_remove(struct acpi_device *device, int type);
+
+static struct acpi_driver hotkey_driver = {
+ .name = ACPI_HOTK_NAME,
+ .class = ACPI_HOTK_CLASS,
+ .ids = ACPI_HOTK_HID,
+ .ops = {
+ .add = auto_hotkey_add,
+ .remove = auto_hotkey_remove,
+ },
+};
+
+static int hotkey_open_config(struct inode *inode, struct file *file);
+static ssize_t hotkey_write_config(struct file *file,
+ const char __user * buffer,
+ size_t count, loff_t * data);
+static ssize_t hotkey_write_poll_config(struct file *file,
+ const char __user * buffer,
+ size_t count, loff_t * data);
+static int hotkey_info_open_fs(struct inode *inode, struct file *file);
+static int hotkey_action_open_fs(struct inode *inode, struct file *file);
+static ssize_t hotkey_execute_aml_method(struct file *file,
+ const char __user * buffer,
+ size_t count, loff_t * data);
+static int hotkey_config_seq_show(struct seq_file *seq, void *offset);
+static int hotkey_polling_open_fs(struct inode *inode, struct file *file);
+
+/* event based config */
+static struct file_operations hotkey_config_fops = {
+ .open = hotkey_open_config,
+ .read = seq_read,
+ .write = hotkey_write_config,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+/* polling based config */
+static struct file_operations hotkey_poll_config_fops = {
+ .open = hotkey_open_config,
+ .read = seq_read,
+ .write = hotkey_write_poll_config,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+/* hotkey driver info */
+static struct file_operations hotkey_info_fops = {
+ .open = hotkey_info_open_fs,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+/* action */
+static struct file_operations hotkey_action_fops = {
+ .open = hotkey_action_open_fs,
+ .read = seq_read,
+ .write = hotkey_execute_aml_method,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+/* polling results */
+static struct file_operations hotkey_polling_fops = {
+ .open = hotkey_polling_open_fs,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+struct acpi_hotkey_list global_hotkey_list; /* link all ev or pl hotkey */
+struct list_head hotkey_entries; /* head of the list of hotkey_list */
+
+static int hotkey_info_seq_show(struct seq_file *seq, void *offset)
+{
+ ACPI_FUNCTION_TRACE("hotkey_info_seq_show");
+
+ seq_printf(seq, "Hotkey generic driver ver: %s", HOTKEY_ACPI_VERSION);
+
+ return_VALUE(0);
+}
+
+static int hotkey_info_open_fs(struct inode *inode, struct file *file)
+{
+ return single_open(file, hotkey_info_seq_show, PDE(inode)->data);
+}
+
+static char *format_result(union acpi_object *object)
+{
+ char *buf = (char *)kmalloc(sizeof(union acpi_object), GFP_KERNEL);
+
+ memset(buf, 0, sizeof(union acpi_object));
+
+ /* Now, just support integer type */
+ if (object->type == ACPI_TYPE_INTEGER)
+ sprintf(buf, "%d", (u32) object->integer.value);
+
+ return buf;
+}
+
+static int hotkey_polling_seq_show(struct seq_file *seq, void *offset)
+{
+ struct acpi_polling_hotkey *poll_hotkey =
+ (struct acpi_polling_hotkey *)seq->private;
+
+ ACPI_FUNCTION_TRACE("hotkey_polling_seq_show");
+
+ if (poll_hotkey->poll_result)
+ seq_printf(seq, "%s", format_result(poll_hotkey->poll_result));
+
+ return_VALUE(0);
+}
+
+static int hotkey_polling_open_fs(struct inode *inode, struct file *file)
+{
+ return single_open(file, hotkey_polling_seq_show, PDE(inode)->data);
+}
+
+static int hotkey_action_open_fs(struct inode *inode, struct file *file)
+{
+ return single_open(file, hotkey_info_seq_show, PDE(inode)->data);
+}
+
+/* Mapping external hotkey number to standardized hotkey event num */
+static int hotkey_get_internal_event(int event, struct acpi_hotkey_list *list)
+{
+ struct list_head *entries, *next;
+ int val = 0;
+
+ ACPI_FUNCTION_TRACE("hotkey_get_internal_event");
+
+ list_for_each_safe(entries, next, list->entries) {
+ union acpi_hotkey *key =
+ container_of(entries, union acpi_hotkey, entries);
+ if (key->link.hotkey_type == ACPI_HOTKEY_EVENT
+ && key->event_hotkey.external_hotkey_num == event)
+ val = key->link.hotkey_standard_num;
+ else
+ val = -1;
+ }
+
+ return_VALUE(val);
+}
+
+static void
+acpi_hotkey_notify_handler(acpi_handle handle, u32 event, void *data)
+{
+ struct acpi_device *device = NULL;
+ u32 internal_event;
+
+ ACPI_FUNCTION_TRACE("acpi_hotkey_notify_handler");
+
+ if (acpi_bus_get_device(handle, &device))
+ return_VOID;
+
+ internal_event = hotkey_get_internal_event(event, &global_hotkey_list);
+ acpi_bus_generate_event(device, event, 0);
+
+ return_VOID;
+}
+
+/* Need to invent automatically hotkey add method */
+static int auto_hotkey_add(struct acpi_device *device)
+{
+ /* Implement me */
+ return 0;
+}
+
+/* Need to invent automatically hotkey remove method */
+static int auto_hotkey_remove(struct acpi_device *device, int type)
+{
+ /* Implement me */
+ return 0;
+}
+
+/* Create a proc file for each polling method */
+static int create_polling_proc(union acpi_hotkey *device)
+{
+ struct proc_dir_entry *proc;
+
+ ACPI_FUNCTION_TRACE("create_polling_proc");
+ mode_t mode = S_IFREG | S_IRUGO | S_IWUGO;
+
+ proc = create_proc_entry(device->poll_hotkey.action_method,
+ mode, hotkey_proc_dir);
+
+ if (!proc) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Hotkey: Unable to create %s entry\n",
+ device->poll_hotkey.poll_method));
+ return_VALUE(-ENODEV);
+ } else {
+ proc->proc_fops = &hotkey_polling_fops;
+ proc->owner = THIS_MODULE;
+ proc->data = device;
+ proc->uid = 0;
+ proc->gid = 0;
+ device->poll_hotkey.proc = proc;
+ }
+ return_VALUE(0);
+}
+
+static int is_valid_acpi_path(const char *pathname)
+{
+ acpi_handle handle;
+ acpi_status status;
+ ACPI_FUNCTION_TRACE("is_valid_acpi_path");
+
+ status = acpi_get_handle(NULL, (char *)pathname, &handle);
+ return_VALUE(!ACPI_FAILURE(status));
+}
+
+static int is_valid_hotkey(union acpi_hotkey *device)
+{
+ ACPI_FUNCTION_TRACE("is_valid_hotkey");
+ /* Implement valid check */
+ return_VALUE(1);
+}
+
+static int hotkey_add(union acpi_hotkey *device)
+{
+ int status = 0;
+ struct acpi_device *dev = NULL;
+
+ ACPI_FUNCTION_TRACE("hotkey_add");
+
+ if (device->link.hotkey_type == ACPI_HOTKEY_EVENT) {
+ status =
+ acpi_bus_get_device(device->event_hotkey.bus_handle, &dev);
+ if (status)
+ return_VALUE(status);
+
+ status = acpi_install_notify_handler(dev->handle,
+ ACPI_SYSTEM_NOTIFY,
+ acpi_hotkey_notify_handler,
+ device);
+ } else /* Add polling hotkey */
+ create_polling_proc(device);
+
+ global_hotkey_list.count++;
+
+ list_add_tail(&device->link.entries, global_hotkey_list.entries);
+
+ return_VALUE(status);
+}
+
+static int hotkey_remove(union acpi_hotkey *device)
+{
+ struct list_head *entries, *next;
+
+ ACPI_FUNCTION_TRACE("hotkey_remove");
+
+ list_for_each_safe(entries, next, global_hotkey_list.entries) {
+ union acpi_hotkey *key =
+ container_of(entries, union acpi_hotkey, entries);
+ if (key->link.hotkey_standard_num ==
+ device->link.hotkey_standard_num) {
+ list_del(&key->link.entries);
+ remove_proc_entry(key->poll_hotkey.action_method,
+ hotkey_proc_dir);
+ global_hotkey_list.count--;
+ break;
+ }
+ }
+ return_VALUE(0);
+}
+
+static void hotkey_update(union acpi_hotkey *key)
+{
+ struct list_head *entries, *next;
+
+ ACPI_FUNCTION_TRACE("hotkey_update");
+
+ list_for_each_safe(entries, next, global_hotkey_list.entries) {
+ union acpi_hotkey *key =
+ container_of(entries, union acpi_hotkey, entries);
+ if (key->link.hotkey_standard_num ==
+ key->link.hotkey_standard_num) {
+ key->event_hotkey.bus_handle =
+ key->event_hotkey.bus_handle;
+ key->event_hotkey.external_hotkey_num =
+ key->event_hotkey.external_hotkey_num;
+ key->event_hotkey.action_handle =
+ key->event_hotkey.action_handle;
+ key->event_hotkey.action_method =
+ key->event_hotkey.action_method;
+ break;
+ }
+ }
+
+ return_VOID;
+}
+
+static void free_hotkey_device(union acpi_hotkey *key)
+{
+ struct acpi_device *dev;
+ int status;
+
+ ACPI_FUNCTION_TRACE("free_hotkey_device");
+
+ if (key->link.hotkey_type == ACPI_HOTKEY_EVENT) {
+ status =
+ acpi_bus_get_device(key->event_hotkey.bus_handle, &dev);
+ if (dev->handle)
+ acpi_remove_notify_handler(dev->handle,
+ ACPI_SYSTEM_NOTIFY,
+ acpi_hotkey_notify_handler);
+ } else
+ remove_proc_entry(key->poll_hotkey.action_method,
+ hotkey_proc_dir);
+ kfree(key);
+ return_VOID;
+}
+
+static int
+init_hotkey_device(union acpi_hotkey *key, char *bus_str, char *action_str,
+ char *method, int std_num, int external_num)
+{
+ ACPI_FUNCTION_TRACE("init_hotkey_device");
+
+ key->link.hotkey_type = ACPI_HOTKEY_EVENT;
+ key->link.hotkey_standard_num = std_num;
+ key->event_hotkey.flag = 0;
+ if (is_valid_acpi_path(bus_str))
+ acpi_get_handle((acpi_handle) 0,
+ bus_str, &(key->event_hotkey.bus_handle));
+ else
+ return_VALUE(-ENODEV);
+ key->event_hotkey.external_hotkey_num = external_num;
+ if (is_valid_acpi_path(action_str))
+ acpi_get_handle((acpi_handle) 0,
+ action_str, &(key->event_hotkey.action_handle));
+ key->event_hotkey.action_method = kmalloc(sizeof(method), GFP_KERNEL);
+ strcpy(key->event_hotkey.action_method, method);
+
+ return_VALUE(!is_valid_hotkey(key));
+}
+
+static int
+init_poll_hotkey_device(union acpi_hotkey *key,
+ char *poll_str,
+ char *poll_method,
+ char *action_str, char *action_method, int std_num)
+{
+ ACPI_FUNCTION_TRACE("init_poll_hotkey_device");
+
+ key->link.hotkey_type = ACPI_HOTKEY_POLLING;
+ key->link.hotkey_standard_num = std_num;
+ key->poll_hotkey.flag = 0;
+ if (is_valid_acpi_path(poll_str))
+ acpi_get_handle((acpi_handle) 0,
+ poll_str, &(key->poll_hotkey.poll_handle));
+ else
+ return_VALUE(-ENODEV);
+ key->poll_hotkey.poll_method = poll_method;
+ if (is_valid_acpi_path(action_str))
+ acpi_get_handle((acpi_handle) 0,
+ action_str, &(key->poll_hotkey.action_handle));
+ key->poll_hotkey.action_method =
+ kmalloc(sizeof(action_method), GFP_KERNEL);
+ strcpy(key->poll_hotkey.action_method, action_method);
+ key->poll_hotkey.poll_result =
+ (union acpi_object *)kmalloc(sizeof(union acpi_object), GFP_KERNEL);
+ return_VALUE(is_valid_hotkey(key));
+}
+
+static int check_hotkey_valid(union acpi_hotkey *key,
+ struct acpi_hotkey_list *list)
+{
+ ACPI_FUNCTION_TRACE("check_hotkey_valid");
+ return_VALUE(0);
+}
+
+static int hotkey_open_config(struct inode *inode, struct file *file)
+{
+ ACPI_FUNCTION_TRACE("hotkey_open_config");
+ return_VALUE(single_open
+ (file, hotkey_config_seq_show, PDE(inode)->data));
+}
+
+static int hotkey_config_seq_show(struct seq_file *seq, void *offset)
+{
+ struct acpi_hotkey_list *hotkey_list = &global_hotkey_list;
+ struct list_head *entries, *next;
+ char bus_name[ACPI_PATHNAME_MAX] = { 0 };
+ char action_name[ACPI_PATHNAME_MAX] = { 0 };
+ struct acpi_buffer bus = { ACPI_PATHNAME_MAX, bus_name };
+ struct acpi_buffer act = { ACPI_PATHNAME_MAX, action_name };
+
+ ACPI_FUNCTION_TRACE(("hotkey_config_seq_show"));
+
+ if (!hotkey_list)
+ goto end;
+
+ list_for_each_safe(entries, next, hotkey_list->entries) {
+ union acpi_hotkey *key =
+ container_of(entries, union acpi_hotkey, entries);
+ if (key->link.hotkey_type == ACPI_HOTKEY_EVENT) {
+ acpi_get_name(key->event_hotkey.bus_handle,
+ ACPI_NAME_TYPE_MAX, &bus);
+ acpi_get_name(key->event_hotkey.action_handle,
+ ACPI_NAME_TYPE_MAX, &act);
+ seq_printf(seq, "%s:%s:%s:%d:%d", bus_name,
+ action_name,
+ key->event_hotkey.action_method,
+ key->link.hotkey_standard_num,
+ key->event_hotkey.external_hotkey_num);
+ } /* ACPI_HOTKEY_POLLING */
+ else {
+ acpi_get_name(key->poll_hotkey.poll_handle,
+ ACPI_NAME_TYPE_MAX, &bus);
+ acpi_get_name(key->poll_hotkey.action_handle,
+ ACPI_NAME_TYPE_MAX, &act);
+ seq_printf(seq, "%s:%s:%s:%s:%d", bus_name,
+ key->poll_hotkey.poll_method,
+ action_name,
+ key->poll_hotkey.action_method,
+ key->link.hotkey_standard_num);
+ }
+ }
+ seq_puts(seq, "\n");
+ end:
+ return_VALUE(0);
+}
+
+static int
+get_parms(char *config_record,
+ int *cmd,
+ char *bus_handle,
+ char *bus_method,
+ char *action_handle,
+ char *method, int *internal_event_num, int *external_event_num)
+{
+ char *tmp, *tmp1;
+ ACPI_FUNCTION_TRACE(("get_parms"));
+
+ sscanf(config_record, "%d", cmd);
+
+ tmp = strchr(config_record, ':');
+ tmp++;
+ tmp1 = strchr(tmp, ':');
+ strncpy(bus_handle, tmp, tmp1 - tmp);
+ bus_handle[tmp1 - tmp] = 0;
+
+ tmp = tmp1;
+ tmp++;
+ tmp1 = strchr(tmp, ':');
+ strncpy(bus_method, tmp, tmp1 - tmp);
+ bus_method[tmp1 - tmp] = 0;
+
+ tmp = tmp1;
+ tmp++;
+ tmp1 = strchr(tmp, ':');
+ strncpy(action_handle, tmp, tmp1 - tmp);
+ action_handle[tmp1 - tmp] = 0;
+
+ tmp = tmp1;
+ tmp++;
+ tmp1 = strchr(tmp, ':');
+ strncpy(method, tmp, tmp1 - tmp);
+ method[tmp1 - tmp] = 0;
+
+ sscanf(tmp1 + 1, "%d:%d", internal_event_num, external_event_num);
+ return_VALUE(6);
+}
+
+/* count is length for one input record */
+static ssize_t hotkey_write_config(struct file *file,
+ const char __user * buffer,
+ size_t count, loff_t * data)
+{
+ struct acpi_hotkey_list *hotkey_list = &global_hotkey_list;
+ char config_record[MAX_CONFIG_RECORD_LEN];
+ char bus_handle[MAX_NAME_PATH_LEN];
+ char bus_method[MAX_NAME_PATH_LEN];
+ char action_handle[MAX_NAME_PATH_LEN];
+ char method[20];
+ int cmd, internal_event_num, external_event_num;
+ int ret = 0;
+ union acpi_hotkey *key = NULL;
+
+ ACPI_FUNCTION_TRACE(("hotkey_write_config"));
+
+ if (!hotkey_list || count > MAX_CONFIG_RECORD_LEN) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid arguments\n"));
+ return_VALUE(-EINVAL);
+ }
+
+ if (copy_from_user(config_record, buffer, count)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid data \n"));
+ return_VALUE(-EINVAL);
+ }
+ config_record[count] = '\0';
+
+ ret = get_parms(config_record,
+ &cmd,
+ bus_handle,
+ bus_method,
+ action_handle,
+ method, &internal_event_num, &external_event_num);
+ if (ret != 6) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Invalid data format ret=%d\n", ret));
+ return_VALUE(-EINVAL);
+ }
+
+ key = kmalloc(sizeof(union acpi_hotkey), GFP_KERNEL);
+ ret = init_hotkey_device(key, bus_handle, action_handle, method,
+ internal_event_num, external_event_num);
+
+ if (ret || check_hotkey_valid(key, hotkey_list)) {
+ kfree(key);
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid hotkey \n"));
+ return_VALUE(-EINVAL);
+ }
+ switch (cmd) {
+ case 0:
+ hotkey_add(key);
+ break;
+ case 1:
+ hotkey_remove(key);
+ free_hotkey_device(key);
+ break;
+ case 2:
+ hotkey_update(key);
+ break;
+ default:
+ break;
+ }
+ return_VALUE(count);
+}
+
+/* count is length for one input record */
+static ssize_t hotkey_write_poll_config(struct file *file,
+ const char __user * buffer,
+ size_t count, loff_t * data)
+{
+ struct seq_file *m = (struct seq_file *)file->private_data;
+ struct acpi_hotkey_list *hotkey_list =
+ (struct acpi_hotkey_list *)m->private;
+
+ char config_record[MAX_CONFIG_RECORD_LEN];
+ char polling_handle[MAX_NAME_PATH_LEN];
+ char action_handle[MAX_NAME_PATH_LEN];
+ char poll_method[20], action_method[20];
+ int ret, internal_event_num, cmd, external_event_num;
+ union acpi_hotkey *key = NULL;
+
+ ACPI_FUNCTION_TRACE("hotkey_write_poll_config");
+
+ if (!hotkey_list || count > MAX_CONFIG_RECORD_LEN) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid arguments\n"));
+ return_VALUE(-EINVAL);
+ }
+
+ if (copy_from_user(config_record, buffer, count)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid data \n"));
+ return_VALUE(-EINVAL);
+ }
+ config_record[count] = '\0';
+
+ ret = get_parms(config_record,
+ &cmd,
+ polling_handle,
+ poll_method,
+ action_handle,
+ action_method,
+ &internal_event_num, &external_event_num);
+
+ if (ret != 6) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid data format\n"));
+ return_VALUE(-EINVAL);
+ }
+
+ key = kmalloc(sizeof(union acpi_hotkey), GFP_KERNEL);
+ ret = init_poll_hotkey_device(key, polling_handle, poll_method,
+ action_handle, action_method,
+ internal_event_num);
+ if (ret || check_hotkey_valid(key, hotkey_list)) {
+ kfree(key);
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid hotkey \n"));
+ return_VALUE(-EINVAL);
+ }
+ switch (cmd) {
+ case 0:
+ hotkey_add(key);
+ break;
+ case 1:
+ hotkey_remove(key);
+ break;
+ case 2:
+ hotkey_update(key);
+ break;
+ default:
+ break;
+ }
+ return_VALUE(count);
+}
+
+/*
+ * This function evaluates an ACPI method, given an int as parameter, the
+ * method is searched within the scope of the handle, can be NULL. The output
+ * of the method is written is output, which can also be NULL
+ *
+ * returns 1 if write is successful, 0 else.
+ */
+static int write_acpi_int(acpi_handle handle, const char *method, int val,
+ struct acpi_buffer *output)
+{
+ struct acpi_object_list params; /* list of input parameters (an int here) */
+ union acpi_object in_obj; /* the only param we use */
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE("write_acpi_int");
+ params.count = 1;
+ params.pointer = &in_obj;
+ in_obj.type = ACPI_TYPE_INTEGER;
+ in_obj.integer.value = val;
+
+ status = acpi_evaluate_object(handle, (char *)method, ¶ms, output);
+
+ return_VALUE(status == AE_OK);
+}
+
+static int read_acpi_int(acpi_handle handle, const char *method, int *val)
+{
+ struct acpi_buffer output;
+ union acpi_object out_obj;
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE("read_acpi_int");
+ output.length = sizeof(out_obj);
+ output.pointer = &out_obj;
+
+ status = acpi_evaluate_object(handle, (char *)method, NULL, &output);
+ *val = out_obj.integer.value;
+ return_VALUE((status == AE_OK)
+ && (out_obj.type == ACPI_TYPE_INTEGER));
+}
+
+static acpi_handle
+get_handle_from_hotkeylist(struct acpi_hotkey_list *hotkey_list, int event_num)
+{
+ struct list_head *entries, *next;
+
+ list_for_each_safe(entries, next, hotkey_list->entries) {
+ union acpi_hotkey *key =
+ container_of(entries, union acpi_hotkey, entries);
+ if (key->link.hotkey_type == ACPI_HOTKEY_EVENT
+ && key->link.hotkey_standard_num == event_num) {
+ return (key->event_hotkey.action_handle);
+ }
+ }
+ return (NULL);
+}
+
+static
+char *get_method_from_hotkeylist(struct acpi_hotkey_list *hotkey_list,
+ int event_num)
+{
+ struct list_head *entries, *next;
+
+ list_for_each_safe(entries, next, hotkey_list->entries) {
+ union acpi_hotkey *key =
+ container_of(entries, union acpi_hotkey, entries);
+
+ if (key->link.hotkey_type == ACPI_HOTKEY_EVENT &&
+ key->link.hotkey_standard_num == event_num)
+ return (key->event_hotkey.action_method);
+ }
+ return (NULL);
+}
+
+static struct acpi_polling_hotkey *get_hotkey_by_event(struct
+ acpi_hotkey_list
+ *hotkey_list, int event)
+{
+ struct list_head *entries, *next;
+
+ list_for_each_safe(entries, next, hotkey_list->entries) {
+ union acpi_hotkey *key =
+ container_of(entries, union acpi_hotkey, entries);
+ if (key->link.hotkey_type == ACPI_HOTKEY_POLLING
+ && key->link.hotkey_standard_num == event) {
+ return (&key->poll_hotkey);
+ }
+ }
+ return (NULL);
+}
+
+/*
+ * user call AML method interface:
+ * Call convention:
+ * echo "event_num: arg type : value"
+ * example: echo "1:1:30" > /proc/acpi/action
+ * Just support 1 integer arg passing to AML method
+ */
+
+static ssize_t hotkey_execute_aml_method(struct file *file,
+ const char __user * buffer,
+ size_t count, loff_t * data)
+{
+ struct acpi_hotkey_list *hotkey_list = &global_hotkey_list;
+ char arg[MAX_CALL_PARM];
+ int event, type, value;
+
+ char *method;
+ acpi_handle handle;
+
+ ACPI_FUNCTION_TRACE("hotkey_execte_aml_method");
+
+ if (!hotkey_list || count > MAX_CALL_PARM) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid argument 1"));
+ return_VALUE(-EINVAL);
+ }
+
+ if (copy_from_user(arg, buffer, count)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid argument 2"));
+ return_VALUE(-EINVAL);
+ }
+
+ arg[count] = '\0';
+
+ if (sscanf(arg, "%d:%d:%d", &event, &type, &value) != 3) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid argument 3"));
+ return_VALUE(-EINVAL);
+ }
+
+ if (type == ACPI_TYPE_INTEGER) {
+ handle = get_handle_from_hotkeylist(hotkey_list, event);
+ method = (char *)get_method_from_hotkeylist(hotkey_list, event);
+ if (IS_EVENT(event))
+ write_acpi_int(handle, method, value, NULL);
+ else if (IS_POLL(event)) {
+ struct acpi_polling_hotkey *key;
+ key = (struct acpi_polling_hotkey *)
+ get_hotkey_by_event(hotkey_list, event);
+ read_acpi_int(handle, method, key->poll_result);
+ }
+ } else {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Not supported"));
+ return_VALUE(-EINVAL);
+ }
+
+ return_VALUE(count);
+}
+
+static int __init hotkey_init(void)
+{
+ int result;
+ mode_t mode = S_IFREG | S_IRUGO | S_IWUGO;
+
+ ACPI_FUNCTION_TRACE("hotkey_init");
+
+ if (acpi_disabled)
+ return -ENODEV;
+
+ if (acpi_specific_hotkey_enabled) {
+ printk("Using specific hotkey driver\n");
+ return -ENODEV;
+ }
+
+ hotkey_proc_dir = proc_mkdir(HOTKEY_PROC, acpi_root_dir);
+ if (!hotkey_proc_dir) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Hotkey: Unable to create %s entry\n",
+ HOTKEY_PROC));
+ return (-ENODEV);
+ }
+ hotkey_proc_dir->owner = THIS_MODULE;
+
+ hotkey_config =
+ create_proc_entry(HOTKEY_EV_CONFIG, mode, hotkey_proc_dir);
+ if (!hotkey_config) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Hotkey: Unable to create %s entry\n",
+ HOTKEY_EV_CONFIG));
+ return (-ENODEV);
+ } else {
+ hotkey_config->proc_fops = &hotkey_config_fops;
+ hotkey_config->data = &global_hotkey_list;
+ hotkey_config->owner = THIS_MODULE;
+ hotkey_config->uid = 0;
+ hotkey_config->gid = 0;
+ }
+
+ hotkey_poll_config =
+ create_proc_entry(HOTKEY_PL_CONFIG, mode, hotkey_proc_dir);
+ if (!hotkey_poll_config) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Hotkey: Unable to create %s entry\n",
+ HOTKEY_EV_CONFIG));
+ return (-ENODEV);
+ } else {
+ hotkey_poll_config->proc_fops = &hotkey_poll_config_fops;
+ hotkey_poll_config->data = &global_hotkey_list;
+ hotkey_poll_config->owner = THIS_MODULE;
+ hotkey_poll_config->uid = 0;
+ hotkey_poll_config->gid = 0;
+ }
+
+ hotkey_action = create_proc_entry(HOTKEY_ACTION, mode, hotkey_proc_dir);
+ if (!hotkey_action) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Hotkey: Unable to create %s entry\n",
+ HOTKEY_ACTION));
+ return (-ENODEV);
+ } else {
+ hotkey_action->proc_fops = &hotkey_action_fops;
+ hotkey_action->owner = THIS_MODULE;
+ hotkey_action->uid = 0;
+ hotkey_action->gid = 0;
+ }
+
+ hotkey_info = create_proc_entry(HOTKEY_INFO, mode, hotkey_proc_dir);
+ if (!hotkey_info) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Hotkey: Unable to create %s entry\n",
+ HOTKEY_INFO));
+ return (-ENODEV);
+ } else {
+ hotkey_info->proc_fops = &hotkey_info_fops;
+ hotkey_info->owner = THIS_MODULE;
+ hotkey_info->uid = 0;
+ hotkey_info->gid = 0;
+ }
+
+ result = acpi_bus_register_driver(&hotkey_driver);
+ if (result < 0) {
+ remove_proc_entry(HOTKEY_PROC, acpi_root_dir);
+ return (-ENODEV);
+ }
+ global_hotkey_list.count = 0;
+ global_hotkey_list.entries = &hotkey_entries;
+
+ INIT_LIST_HEAD(&hotkey_entries);
+
+ return (0);
+}
+
+static void __exit hotkey_exit(void)
+{
+ struct list_head *entries, *next;
+
+ ACPI_FUNCTION_TRACE("hotkey_remove");
+
+ list_for_each_safe(entries, next, global_hotkey_list.entries) {
+ union acpi_hotkey *key =
+ container_of(entries, union acpi_hotkey, entries);
+
+ acpi_os_wait_events_complete(NULL);
+ list_del(&key->link.entries);
+ global_hotkey_list.count--;
+ free_hotkey_device(key);
+ }
+ acpi_bus_unregister_driver(&hotkey_driver);
+ remove_proc_entry(HOTKEY_EV_CONFIG, hotkey_proc_dir);
+ remove_proc_entry(HOTKEY_PL_CONFIG, hotkey_proc_dir);
+ remove_proc_entry(HOTKEY_ACTION, hotkey_proc_dir);
+ remove_proc_entry(HOTKEY_INFO, hotkey_proc_dir);
+ remove_proc_entry(HOTKEY_PROC, acpi_root_dir);
+ return;
+}
+
+module_init(hotkey_init);
+module_exit(hotkey_exit);
projects / linux-2.6 / commitdiff