diff options
Diffstat (limited to 'apps/drivers/device/device.cpp')
| -rw-r--r-- | apps/drivers/device/device.cpp | 227 |
1 files changed, 0 insertions, 227 deletions
diff --git a/apps/drivers/device/device.cpp b/apps/drivers/device/device.cpp deleted file mode 100644 index 04a5222c3..000000000 --- a/apps/drivers/device/device.cpp +++ /dev/null @@ -1,227 +0,0 @@ -/**************************************************************************** - * - * Copyright (C) 2012 PX4 Development Team. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * 3. Neither the name PX4 nor the names of its contributors may be - * used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS - * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE - * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, - * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS - * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED - * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN - * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - * - ****************************************************************************/ - -/** - * @file device.cpp - * - * Fundamental driver base class for the device framework. - */ - -#include "device.h" - -#include <nuttx/arch.h> -#include <stdio.h> -#include <unistd.h> - -namespace device -{ - -/** - * Interrupt dispatch table entry. - */ -struct irq_entry { - int irq; - Device *owner; -}; - -static const unsigned irq_nentries = 8; /**< size of the interrupt dispatch table */ -static irq_entry irq_entries[irq_nentries]; /**< interrupt dispatch table (XXX should be a vector) */ - -/** - * Register an interrupt to a specific device. - * - * @param irq The interrupt number to register. - * @param owner The device receiving the interrupt. - * @return OK if the interrupt was registered. - */ -static int register_interrupt(int irq, Device *owner); - -/** - * Unregister an interrupt. - * - * @param irq The previously-registered interrupt to be de-registered. - */ -static void unregister_interrupt(int irq); - -/** - * Handle an interrupt. - * - * @param irq The interrupt being invoked. - * @param context The interrupt register context. - * @return Always returns OK. - */ -static int interrupt(int irq, void *context); - -Device::Device(const char *name, - int irq) : - // public - // protected - _name(name), - _debug_enabled(false), - // private - _irq(irq), - _irq_attached(false) -{ - sem_init(&_lock, 0, 1); -} - -Device::~Device() -{ - sem_destroy(&_lock); - - if (_irq_attached) - unregister_interrupt(_irq); -} - -int -Device::init() -{ - int ret = OK; - - // If assigned an interrupt, connect it - if (_irq) { - /* ensure it's disabled */ - up_disable_irq(_irq); - - /* register */ - ret = register_interrupt(_irq, this); - - if (ret != OK) - goto out; - - _irq_attached = true; - } - -out: - return ret; -} - -void -Device::interrupt_enable() -{ - if (_irq_attached) - up_enable_irq(_irq); -} - -void -Device::interrupt_disable() -{ - if (_irq_attached) - up_disable_irq(_irq); -} - -void -Device::interrupt(void *context) -{ - // default action is to disable the interrupt so we don't get called again - interrupt_disable(); -} - -void -Device::log(const char *fmt, ...) -{ - va_list ap; - - printf("[%s] ", _name); - va_start(ap, fmt); - vprintf(fmt, ap); - va_end(ap); - printf("\n"); - fflush(stdout); -} - -void -Device::debug(const char *fmt, ...) -{ - va_list ap; - - if (_debug_enabled) { - printf("<%s> ", _name); - va_start(ap, fmt); - vprintf(fmt, ap); - va_end(ap); - printf("\n"); - fflush(stdout); - } -} - -static int -register_interrupt(int irq, Device *owner) -{ - int ret = -ENOMEM; - - // look for a slot where we can register the interrupt - for (unsigned i = 0; i < irq_nentries; i++) { - if (irq_entries[i].irq == 0) { - - // great, we could put it here; try attaching it - ret = irq_attach(irq, &interrupt); - - if (ret == OK) { - irq_entries[i].irq = irq; - irq_entries[i].owner = owner; - } - - break; - } - } - - return ret; -} - -static void -unregister_interrupt(int irq) -{ - for (unsigned i = 0; i < irq_nentries; i++) { - if (irq_entries[i].irq == irq) { - irq_entries[i].irq = 0; - irq_entries[i].owner = nullptr; - } - } -} - -static int -interrupt(int irq, void *context) -{ - for (unsigned i = 0; i < irq_nentries; i++) { - if (irq_entries[i].irq == irq) { - irq_entries[i].owner->interrupt(context); - break; - } - } - - return OK; -} - - -} // namespace device
\ No newline at end of file |