summaryrefslogtreecommitdiffstats
path: root/net/rfkill/rfkill-input.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/rfkill/rfkill-input.c')
-rw-r--r--net/rfkill/rfkill-input.c390
1 files changed, 0 insertions, 390 deletions
diff --git a/net/rfkill/rfkill-input.c b/net/rfkill/rfkill-input.c
deleted file mode 100644
index 60a34f3b5f6..00000000000
--- a/net/rfkill/rfkill-input.c
+++ /dev/null
@@ -1,390 +0,0 @@
-/*
- * Input layer to RF Kill interface connector
- *
- * Copyright (c) 2007 Dmitry Torokhov
- */
-
-/*
- * 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 published
- * by the Free Software Foundation.
- */
-
-#include <linux/module.h>
-#include <linux/input.h>
-#include <linux/slab.h>
-#include <linux/workqueue.h>
-#include <linux/init.h>
-#include <linux/rfkill.h>
-#include <linux/sched.h>
-
-#include "rfkill-input.h"
-
-MODULE_AUTHOR("Dmitry Torokhov <dtor@mail.ru>");
-MODULE_DESCRIPTION("Input layer to RF switch connector");
-MODULE_LICENSE("GPL");
-
-enum rfkill_input_master_mode {
- RFKILL_INPUT_MASTER_DONOTHING = 0,
- RFKILL_INPUT_MASTER_RESTORE = 1,
- RFKILL_INPUT_MASTER_UNBLOCKALL = 2,
- RFKILL_INPUT_MASTER_MAX, /* marker */
-};
-
-/* Delay (in ms) between consecutive switch ops */
-#define RFKILL_OPS_DELAY 200
-
-static enum rfkill_input_master_mode rfkill_master_switch_mode =
- RFKILL_INPUT_MASTER_UNBLOCKALL;
-module_param_named(master_switch_mode, rfkill_master_switch_mode, uint, 0);
-MODULE_PARM_DESC(master_switch_mode,
- "SW_RFKILL_ALL ON should: 0=do nothing; 1=restore; 2=unblock all");
-
-enum rfkill_global_sched_op {
- RFKILL_GLOBAL_OP_EPO = 0,
- RFKILL_GLOBAL_OP_RESTORE,
- RFKILL_GLOBAL_OP_UNLOCK,
- RFKILL_GLOBAL_OP_UNBLOCK,
-};
-
-struct rfkill_task {
- struct delayed_work dwork;
-
- /* ensures that task is serialized */
- struct mutex mutex;
-
- /* protects everything below */
- spinlock_t lock;
-
- /* pending regular switch operations (1=pending) */
- unsigned long sw_pending[BITS_TO_LONGS(RFKILL_TYPE_MAX)];
-
- /* should the state be complemented (1=yes) */
- unsigned long sw_togglestate[BITS_TO_LONGS(RFKILL_TYPE_MAX)];
-
- bool global_op_pending;
- enum rfkill_global_sched_op op;
-
- /* last time it was scheduled */
- unsigned long last_scheduled;
-};
-
-static void __rfkill_handle_global_op(enum rfkill_global_sched_op op)
-{
- unsigned int i;
-
- switch (op) {
- case RFKILL_GLOBAL_OP_EPO:
- rfkill_epo();
- break;
- case RFKILL_GLOBAL_OP_RESTORE:
- rfkill_restore_states();
- break;
- case RFKILL_GLOBAL_OP_UNLOCK:
- rfkill_remove_epo_lock();
- break;
- case RFKILL_GLOBAL_OP_UNBLOCK:
- rfkill_remove_epo_lock();
- for (i = 0; i < RFKILL_TYPE_MAX; i++)
- rfkill_switch_all(i, RFKILL_STATE_UNBLOCKED);
- break;
- default:
- /* memory corruption or bug, fail safely */
- rfkill_epo();
- WARN(1, "Unknown requested operation %d! "
- "rfkill Emergency Power Off activated\n",
- op);
- }
-}
-
-static void __rfkill_handle_normal_op(const enum rfkill_type type,
- const bool c)
-{
- enum rfkill_state state;
-
- state = rfkill_get_global_state(type);
- if (c)
- state = rfkill_state_complement(state);
-
- rfkill_switch_all(type, state);
-}
-
-static void rfkill_task_handler(struct work_struct *work)
-{
- struct rfkill_task *task = container_of(work,
- struct rfkill_task, dwork.work);
- bool doit = true;
-
- mutex_lock(&task->mutex);
-
- spin_lock_irq(&task->lock);
- while (doit) {
- if (task->global_op_pending) {
- enum rfkill_global_sched_op op = task->op;
- task->global_op_pending = false;
- memset(task->sw_pending, 0, sizeof(task->sw_pending));
- spin_unlock_irq(&task->lock);
-
- __rfkill_handle_global_op(op);
-
- /* make sure we do at least one pass with
- * !task->global_op_pending */
- spin_lock_irq(&task->lock);
- continue;
- } else if (!rfkill_is_epo_lock_active()) {
- unsigned int i = 0;
-
- while (!task->global_op_pending &&
- i < RFKILL_TYPE_MAX) {
- if (test_and_clear_bit(i, task->sw_pending)) {
- bool c;
- c = test_and_clear_bit(i,
- task->sw_togglestate);
- spin_unlock_irq(&task->lock);
-
- __rfkill_handle_normal_op(i, c);
-
- spin_lock_irq(&task->lock);
- }
- i++;
- }
- }
- doit = task->global_op_pending;
- }
- spin_unlock_irq(&task->lock);
-
- mutex_unlock(&task->mutex);
-}
-
-static struct rfkill_task rfkill_task = {
- .dwork = __DELAYED_WORK_INITIALIZER(rfkill_task.dwork,
- rfkill_task_handler),
- .mutex = __MUTEX_INITIALIZER(rfkill_task.mutex),
- .lock = __SPIN_LOCK_UNLOCKED(rfkill_task.lock),
-};
-
-static unsigned long rfkill_ratelimit(const unsigned long last)
-{
- const unsigned long delay = msecs_to_jiffies(RFKILL_OPS_DELAY);
- return (time_after(jiffies, last + delay)) ? 0 : delay;
-}
-
-static void rfkill_schedule_ratelimited(void)
-{
- if (!delayed_work_pending(&rfkill_task.dwork)) {
- schedule_delayed_work(&rfkill_task.dwork,
- rfkill_ratelimit(rfkill_task.last_scheduled));
- rfkill_task.last_scheduled = jiffies;
- }
-}
-
-static void rfkill_schedule_global_op(enum rfkill_global_sched_op op)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&rfkill_task.lock, flags);
- rfkill_task.op = op;
- rfkill_task.global_op_pending = true;
- if (op == RFKILL_GLOBAL_OP_EPO && !rfkill_is_epo_lock_active()) {
- /* bypass the limiter for EPO */
- cancel_delayed_work(&rfkill_task.dwork);
- schedule_delayed_work(&rfkill_task.dwork, 0);
- rfkill_task.last_scheduled = jiffies;
- } else
- rfkill_schedule_ratelimited();
- spin_unlock_irqrestore(&rfkill_task.lock, flags);
-}
-
-static void rfkill_schedule_toggle(enum rfkill_type type)
-{
- unsigned long flags;
-
- if (rfkill_is_epo_lock_active())
- return;
-
- spin_lock_irqsave(&rfkill_task.lock, flags);
- if (!rfkill_task.global_op_pending) {
- set_bit(type, rfkill_task.sw_pending);
- change_bit(type, rfkill_task.sw_togglestate);
- rfkill_schedule_ratelimited();
- }
- spin_unlock_irqrestore(&rfkill_task.lock, flags);
-}
-
-static void rfkill_schedule_evsw_rfkillall(int state)
-{
- if (state) {
- switch (rfkill_master_switch_mode) {
- case RFKILL_INPUT_MASTER_UNBLOCKALL:
- rfkill_schedule_global_op(RFKILL_GLOBAL_OP_UNBLOCK);
- break;
- case RFKILL_INPUT_MASTER_RESTORE:
- rfkill_schedule_global_op(RFKILL_GLOBAL_OP_RESTORE);
- break;
- case RFKILL_INPUT_MASTER_DONOTHING:
- rfkill_schedule_global_op(RFKILL_GLOBAL_OP_UNLOCK);
- break;
- default:
- /* memory corruption or driver bug! fail safely */
- rfkill_schedule_global_op(RFKILL_GLOBAL_OP_EPO);
- WARN(1, "Unknown rfkill_master_switch_mode (%d), "
- "driver bug or memory corruption detected!\n",
- rfkill_master_switch_mode);
- break;
- }
- } else
- rfkill_schedule_global_op(RFKILL_GLOBAL_OP_EPO);
-}
-
-static void rfkill_event(struct input_handle *handle, unsigned int type,
- unsigned int code, int data)
-{
- if (type == EV_KEY && data == 1) {
- enum rfkill_type t;
-
- switch (code) {
- case KEY_WLAN:
- t = RFKILL_TYPE_WLAN;
- break;
- case KEY_BLUETOOTH:
- t = RFKILL_TYPE_BLUETOOTH;
- break;
- case KEY_UWB:
- t = RFKILL_TYPE_UWB;
- break;
- case KEY_WIMAX:
- t = RFKILL_TYPE_WIMAX;
- break;
- default:
- return;
- }
- rfkill_schedule_toggle(t);
- return;
- } else if (type == EV_SW) {
- switch (code) {
- case SW_RFKILL_ALL:
- rfkill_schedule_evsw_rfkillall(data);
- return;
- default:
- return;
- }
- }
-}
-
-static int rfkill_connect(struct input_handler *handler, struct input_dev *dev,
- const struct input_device_id *id)
-{
- struct input_handle *handle;
- int error;
-
- handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
- if (!handle)
- return -ENOMEM;
-
- handle->dev = dev;
- handle->handler = handler;
- handle->name = "rfkill";
-
- /* causes rfkill_start() to be called */
- error = input_register_handle(handle);
- if (error)
- goto err_free_handle;
-
- error = input_open_device(handle);
- if (error)
- goto err_unregister_handle;
-
- return 0;
-
- err_unregister_handle:
- input_unregister_handle(handle);
- err_free_handle:
- kfree(handle);
- return error;
-}
-
-static void rfkill_start(struct input_handle *handle)
-{
- /* Take event_lock to guard against configuration changes, we
- * should be able to deal with concurrency with rfkill_event()
- * just fine (which event_lock will also avoid). */
- spin_lock_irq(&handle->dev->event_lock);
-
- if (test_bit(EV_SW, handle->dev->evbit)) {
- if (test_bit(SW_RFKILL_ALL, handle->dev->swbit))
- rfkill_schedule_evsw_rfkillall(test_bit(SW_RFKILL_ALL,
- handle->dev->sw));
- /* add resync for further EV_SW events here */
- }
-
- spin_unlock_irq(&handle->dev->event_lock);
-}
-
-static void rfkill_disconnect(struct input_handle *handle)
-{
- input_close_device(handle);
- input_unregister_handle(handle);
- kfree(handle);
-}
-
-static const struct input_device_id rfkill_ids[] = {
- {
- .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
- .evbit = { BIT_MASK(EV_KEY) },
- .keybit = { [BIT_WORD(KEY_WLAN)] = BIT_MASK(KEY_WLAN) },
- },
- {
- .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
- .evbit = { BIT_MASK(EV_KEY) },
- .keybit = { [BIT_WORD(KEY_BLUETOOTH)] = BIT_MASK(KEY_BLUETOOTH) },
- },
- {
- .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
- .evbit = { BIT_MASK(EV_KEY) },
- .keybit = { [BIT_WORD(KEY_UWB)] = BIT_MASK(KEY_UWB) },
- },
- {
- .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
- .evbit = { BIT_MASK(EV_KEY) },
- .keybit = { [BIT_WORD(KEY_WIMAX)] = BIT_MASK(KEY_WIMAX) },
- },
- {
- .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_SWBIT,
- .evbit = { BIT(EV_SW) },
- .swbit = { [BIT_WORD(SW_RFKILL_ALL)] = BIT_MASK(SW_RFKILL_ALL) },
- },
- { }
-};
-
-static struct input_handler rfkill_handler = {
- .event = rfkill_event,
- .connect = rfkill_connect,
- .disconnect = rfkill_disconnect,
- .start = rfkill_start,
- .name = "rfkill",
- .id_table = rfkill_ids,
-};
-
-static int __init rfkill_handler_init(void)
-{
- if (rfkill_master_switch_mode >= RFKILL_INPUT_MASTER_MAX)
- return -EINVAL;
-
- /*
- * The penalty to not doing this is a possible RFKILL_OPS_DELAY delay
- * at the first use. Acceptable, but if we can avoid it, why not?
- */
- rfkill_task.last_scheduled =
- jiffies - msecs_to_jiffies(RFKILL_OPS_DELAY) - 1;
- return input_register_handler(&rfkill_handler);
-}
-
-static void __exit rfkill_handler_exit(void)
-{
- input_unregister_handler(&rfkill_handler);
- cancel_delayed_work_sync(&rfkill_task.dwork);
- rfkill_remove_epo_lock();
-}
-
-module_init(rfkill_handler_init);
-module_exit(rfkill_handler_exit);