![Alexander Beregalov](/assets/img/avatar_default.png)
Cc: David Kiliani <mail@davidkiliani.de> Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
597 lines
15 KiB
C
597 lines
15 KiB
C
/**
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* @file me8200_do.c
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*
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* @brief ME-8200 digital output subdevice instance.
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* @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
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* @author Guenter Gebhardt
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* @author Krzysztof Gantzke (k.gantzke@meilhaus.de)
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*/
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/*
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* Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
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*
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* This file is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __KERNEL__
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# define __KERNEL__
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#endif
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/*
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* Includes
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/types.h>
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#include <linux/version.h>
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#include "medefines.h"
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#include "meinternal.h"
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#include "meerror.h"
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#include "meids.h"
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#include "medebug.h"
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#include "me8200_reg.h"
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#include "me8200_do_reg.h"
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#include "me8200_do.h"
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/*
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* Defines
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*/
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/*
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* Functions
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*/
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static int me8200_do_io_irq_start(me_subdevice_t *subdevice,
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struct file *filep,
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int channel,
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int irq_source,
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int irq_edge, int irq_arg, int flags)
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{
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me8200_do_subdevice_t *instance;
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int err = ME_ERRNO_SUCCESS;
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uint8_t tmp;
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unsigned long status;
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if (flags & ~ME_IO_IRQ_START_DIO_BYTE) {
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PERROR("Invalid flag specified.\n");
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return ME_ERRNO_INVALID_FLAGS;
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}
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if (channel != 0) {
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PERROR("Invalid channel specified.\n");
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return ME_ERRNO_INVALID_CHANNEL;
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}
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if (irq_source != ME_IRQ_SOURCE_DIO_OVER_TEMP) {
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PERROR("Invalid interrupt source specified.\n");
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return ME_ERRNO_INVALID_IRQ_SOURCE;
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}
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PDEBUG("executed.\n");
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instance = (me8200_do_subdevice_t *) subdevice;
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ME_SUBDEVICE_ENTER;
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spin_lock_irqsave(&instance->subdevice_lock, status);
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spin_lock(instance->irq_mode_lock);
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tmp = inb(instance->irq_ctrl_reg);
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tmp |=
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ME8200_IRQ_MODE_BIT_ENABLE_POWER << (ME8200_IRQ_MODE_POWER_SHIFT *
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instance->do_idx);
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outb(tmp, instance->irq_ctrl_reg);
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PDEBUG_REG("irq_ctrl_reg outb(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
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instance->irq_ctrl_reg - instance->reg_base, tmp);
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spin_unlock(instance->irq_mode_lock);
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instance->rised = 0;
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spin_unlock_irqrestore(&instance->subdevice_lock, status);
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ME_SUBDEVICE_EXIT;
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return err;
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}
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static int me8200_do_io_irq_wait(me_subdevice_t *subdevice,
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struct file *filep,
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int channel,
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int *irq_count,
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int *value, int time_out, int flags)
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{
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me8200_do_subdevice_t *instance;
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int err = ME_ERRNO_SUCCESS;
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long t = 0;
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unsigned long cpu_flags;
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PDEBUG("executed.\n");
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instance = (me8200_do_subdevice_t *) subdevice;
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if (flags) {
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PERROR("Invalid flag specified.\n");
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return ME_ERRNO_INVALID_FLAGS;
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}
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if (time_out < 0) {
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PERROR("Invalid time_out specified.\n");
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return ME_ERRNO_INVALID_TIMEOUT;
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}
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if (time_out) {
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t = (time_out * HZ) / 1000;
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if (t == 0)
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t = 1;
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}
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ME_SUBDEVICE_ENTER;
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if (instance->rised <= 0) {
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instance->rised = 0;
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if (time_out) {
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t = wait_event_interruptible_timeout(instance->
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wait_queue,
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(instance->rised !=
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0), t);
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if (t == 0) {
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PERROR
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("Wait on external interrupt timed out.\n");
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err = ME_ERRNO_TIMEOUT;
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}
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} else {
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wait_event_interruptible(instance->wait_queue,
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(instance->rised != 0));
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}
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if (instance->rised < 0) {
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PERROR("Wait on interrupt aborted by user.\n");
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err = ME_ERRNO_CANCELLED;
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}
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}
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if (signal_pending(current)) {
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PERROR("Wait on external interrupt aborted by signal.\n");
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err = ME_ERRNO_SIGNAL;
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}
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spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
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instance->rised = 0;
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*irq_count = instance->count;
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*value = 0;
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spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
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ME_SUBDEVICE_EXIT;
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return err;
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}
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static int me8200_do_io_irq_stop(me_subdevice_t *subdevice,
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struct file *filep, int channel, int flags)
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{
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me8200_do_subdevice_t *instance;
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uint8_t tmp;
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unsigned long cpu_flags;
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PDEBUG("executed.\n");
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instance = (me8200_do_subdevice_t *) subdevice;
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if (flags) {
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PERROR("Invalid flag specified.\n");
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return ME_ERRNO_INVALID_FLAGS;
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}
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ME_SUBDEVICE_ENTER;
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spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
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spin_lock(instance->irq_mode_lock);
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tmp = inb(instance->irq_ctrl_reg);
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tmp &=
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~(ME8200_IRQ_MODE_BIT_ENABLE_POWER <<
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(ME8200_IRQ_MODE_POWER_SHIFT * instance->do_idx));
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outb(tmp, instance->irq_ctrl_reg);
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PDEBUG_REG("irq_ctrl_reg outb(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
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instance->irq_ctrl_reg - instance->reg_base, tmp);
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spin_unlock(instance->irq_mode_lock);
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instance->rised = -1;
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spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
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wake_up_interruptible_all(&instance->wait_queue);
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ME_SUBDEVICE_EXIT;
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return ME_ERRNO_SUCCESS;
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}
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static int me8200_do_io_reset_subdevice(struct me_subdevice *subdevice,
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struct file *filep, int flags)
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{
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me8200_do_subdevice_t *instance;
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unsigned long cpu_flags;
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uint8_t tmp;
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PDEBUG("executed.\n");
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instance = (me8200_do_subdevice_t *) subdevice;
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if (flags) {
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PERROR("Invalid flag specified.\n");
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return ME_ERRNO_INVALID_FLAGS;
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}
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ME_SUBDEVICE_ENTER;
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spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
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outb(0x00, instance->port_reg);
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PDEBUG_REG("port_reg outb(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
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instance->port_reg - instance->reg_base, 0x00);
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spin_lock(instance->irq_mode_lock);
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tmp = inb(instance->irq_ctrl_reg);
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tmp &=
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~(ME8200_IRQ_MODE_BIT_ENABLE_POWER <<
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(ME8200_IRQ_MODE_POWER_SHIFT * instance->do_idx));
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outb(tmp, instance->irq_ctrl_reg);
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PDEBUG_REG("irq_ctrl_reg outb(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
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instance->irq_ctrl_reg - instance->reg_base, tmp);
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spin_unlock(instance->irq_mode_lock);
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instance->rised = -1;
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instance->count = 0;
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spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
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wake_up_interruptible_all(&instance->wait_queue);
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ME_SUBDEVICE_EXIT;
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return ME_ERRNO_SUCCESS;
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}
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static int me8200_do_io_single_config(me_subdevice_t *subdevice,
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struct file *filep,
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int channel,
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int single_config,
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int ref,
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int trig_chan,
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int trig_type, int trig_edge, int flags)
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{
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me8200_do_subdevice_t *instance;
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int err = ME_ERRNO_SUCCESS;
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unsigned long status;
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PDEBUG("executed.\n");
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instance = (me8200_do_subdevice_t *) subdevice;
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ME_SUBDEVICE_ENTER;
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spin_lock_irqsave(&instance->subdevice_lock, status);
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switch (flags) {
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case ME_IO_SINGLE_CONFIG_NO_FLAGS:
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case ME_IO_SINGLE_CONFIG_DIO_BYTE:
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if (channel == 0) {
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if (single_config == ME_SINGLE_CONFIG_DIO_OUTPUT) {
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} else {
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PERROR("Invalid byte direction specified.\n");
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err = ME_ERRNO_INVALID_SINGLE_CONFIG;
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}
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} else {
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PERROR("Invalid byte specified.\n");
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err = ME_ERRNO_INVALID_CHANNEL;
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}
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break;
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default:
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PERROR("Invalid flags specified.\n");
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err = ME_ERRNO_INVALID_FLAGS;
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}
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spin_unlock_irqrestore(&instance->subdevice_lock, status);
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ME_SUBDEVICE_EXIT;
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return err;
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}
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static int me8200_do_io_single_read(me_subdevice_t *subdevice,
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struct file *filep,
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int channel,
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int *value, int time_out, int flags)
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{
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me8200_do_subdevice_t *instance;
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int err = ME_ERRNO_SUCCESS;
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unsigned long status;
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PDEBUG("executed.\n");
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instance = (me8200_do_subdevice_t *) subdevice;
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ME_SUBDEVICE_ENTER;
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spin_lock_irqsave(&instance->subdevice_lock, status);
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switch (flags) {
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case ME_IO_SINGLE_TYPE_DIO_BIT:
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if ((channel >= 0) && (channel < 8)) {
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*value = inb(instance->port_reg) & (0x1 << channel);
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} else {
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PERROR("Invalid bit number specified.\n");
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err = ME_ERRNO_INVALID_CHANNEL;
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}
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break;
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case ME_IO_SINGLE_NO_FLAGS:
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case ME_IO_SINGLE_TYPE_DIO_BYTE:
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if (channel == 0) {
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*value = inb(instance->port_reg);
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} else {
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PERROR("Invalid byte number specified.\n");
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err = ME_ERRNO_INVALID_CHANNEL;
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}
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break;
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default:
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PERROR("Invalid flags specified.\n");
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err = ME_ERRNO_INVALID_FLAGS;
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}
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spin_unlock_irqrestore(&instance->subdevice_lock, status);
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ME_SUBDEVICE_EXIT;
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return err;
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}
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static int me8200_do_io_single_write(me_subdevice_t *subdevice,
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struct file *filep,
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int channel,
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int value, int time_out, int flags)
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{
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me8200_do_subdevice_t *instance;
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int err = ME_ERRNO_SUCCESS;
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uint8_t state;
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unsigned long status;
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PDEBUG("executed.\n");
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instance = (me8200_do_subdevice_t *) subdevice;
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ME_SUBDEVICE_ENTER;
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spin_lock_irqsave(&instance->subdevice_lock, status);
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switch (flags) {
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case ME_IO_SINGLE_TYPE_DIO_BIT:
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if ((channel >= 0) && (channel < 8)) {
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state = inb(instance->port_reg);
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state =
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value ? (state | (0x1 << channel)) : (state &
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~(0x1 <<
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channel));
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outb(state, instance->port_reg);
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PDEBUG_REG("port_reg outb(0x%lX+0x%lX)=0x%x\n",
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instance->reg_base,
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instance->port_reg - instance->reg_base,
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state);
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} else {
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PERROR("Invalid bit number specified.\n");
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err = ME_ERRNO_INVALID_CHANNEL;
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}
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break;
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case ME_IO_SINGLE_NO_FLAGS:
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case ME_IO_SINGLE_TYPE_DIO_BYTE:
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if (channel == 0) {
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outb(value, instance->port_reg);
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PDEBUG_REG("port_reg outb(0x%lX+0x%lX)=0x%x\n",
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instance->reg_base,
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instance->port_reg - instance->reg_base,
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value);
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} else {
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PERROR("Invalid byte number specified.\n");
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err = ME_ERRNO_INVALID_CHANNEL;
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}
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break;
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default:
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PERROR("Invalid flags specified.\n");
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err = ME_ERRNO_INVALID_FLAGS;
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}
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spin_unlock_irqrestore(&instance->subdevice_lock, status);
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ME_SUBDEVICE_EXIT;
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return err;
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}
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static int me8200_do_query_number_channels(me_subdevice_t *subdevice,
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int *number)
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{
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PDEBUG("executed.\n");
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*number = 8;
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return ME_ERRNO_SUCCESS;
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}
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static int me8200_do_query_subdevice_type(me_subdevice_t *subdevice,
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int *type, int *subtype)
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{
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PDEBUG("executed.\n");
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*type = ME_TYPE_DO;
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*subtype = ME_SUBTYPE_SINGLE;
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return ME_ERRNO_SUCCESS;
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}
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static int me8200_do_query_subdevice_caps(me_subdevice_t *subdevice, int *caps)
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{
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PDEBUG("executed.\n");
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*caps = ME_CAPS_DIO_OVER_TEMP_IRQ;
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return ME_ERRNO_SUCCESS;
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}
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static void me8200_do_destructor(struct me_subdevice *subdevice)
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{
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me8200_do_subdevice_t *instance;
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PDEBUG("executed.\n");
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instance = (me8200_do_subdevice_t *) subdevice;
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free_irq(instance->irq, (void *)instance);
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me_subdevice_deinit(&instance->base);
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kfree(instance);
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}
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static irqreturn_t me8200_do_isr(int irq, void *dev_id)
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{
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me8200_do_subdevice_t *instance;
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uint16_t ctrl;
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uint8_t irq_status;
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instance = (me8200_do_subdevice_t *) dev_id;
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if (irq != instance->irq) {
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PERROR("Incorrect interrupt num: %d.\n", irq);
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return IRQ_NONE;
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}
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irq_status = inb(instance->irq_status_reg);
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if (!
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(irq_status &
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(ME8200_DO_IRQ_STATUS_BIT_ACTIVE << instance->do_idx))) {
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PINFO
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("%ld Shared interrupt. %s(): idx=%d irq_status_reg=0x%04X\n",
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jiffies, __func__, instance->do_idx, irq_status);
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return IRQ_NONE;
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}
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PDEBUG("executed.\n");
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spin_lock(&instance->subdevice_lock);
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instance->rised = 1;
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instance->count++;
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spin_lock(instance->irq_mode_lock);
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ctrl = inw(instance->irq_ctrl_reg);
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ctrl |= ME8200_IRQ_MODE_BIT_CLEAR_POWER << instance->do_idx;
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outw(ctrl, instance->irq_ctrl_reg);
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PDEBUG_REG("irq_ctrl_reg outw(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
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instance->irq_ctrl_reg - instance->reg_base, ctrl);
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ctrl &= ~(ME8200_IRQ_MODE_BIT_CLEAR_POWER << instance->do_idx);
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outw(ctrl, instance->irq_ctrl_reg);
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PDEBUG_REG("irq_ctrl_reg outw(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
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instance->irq_ctrl_reg - instance->reg_base, ctrl);
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spin_unlock(instance->irq_mode_lock);
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spin_unlock(&instance->subdevice_lock);
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wake_up_interruptible_all(&instance->wait_queue);
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return IRQ_HANDLED;
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}
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me8200_do_subdevice_t *me8200_do_constructor(uint32_t reg_base,
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unsigned int do_idx,
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int irq,
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spinlock_t *irq_mode_lock)
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{
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me8200_do_subdevice_t *subdevice;
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int err;
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PDEBUG("executed.\n");
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/* Allocate memory for subdevice instance */
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subdevice = kmalloc(sizeof(me8200_do_subdevice_t), GFP_KERNEL);
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if (!subdevice) {
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PERROR("Cannot get memory for subdevice instance.\n");
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return NULL;
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}
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memset(subdevice, 0, sizeof(me8200_do_subdevice_t));
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/* Initialize subdevice base class */
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err = me_subdevice_init(&subdevice->base);
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if (err) {
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PERROR("Cannot initialize subdevice base class instance.\n");
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kfree(subdevice);
|
|
return NULL;
|
|
}
|
|
// Initialize spin locks.
|
|
spin_lock_init(&subdevice->subdevice_lock);
|
|
|
|
subdevice->irq_mode_lock = irq_mode_lock;
|
|
|
|
/* Save the index of the digital output */
|
|
subdevice->do_idx = do_idx;
|
|
subdevice->irq = irq;
|
|
|
|
/* Initialize the registers */
|
|
if (do_idx == 0) {
|
|
subdevice->port_reg = reg_base + ME8200_DO_PORT_0_REG;
|
|
} else if (do_idx == 1) {
|
|
subdevice->port_reg = reg_base + ME8200_DO_PORT_1_REG;
|
|
} else {
|
|
PERROR("Wrong subdevice idx=%d.\n", do_idx);
|
|
kfree(subdevice);
|
|
return NULL;
|
|
}
|
|
subdevice->irq_ctrl_reg = reg_base + ME8200_IRQ_MODE_REG;
|
|
subdevice->irq_status_reg = reg_base + ME8200_DO_IRQ_STATUS_REG;
|
|
#ifdef MEDEBUG_DEBUG_REG
|
|
subdevice->reg_base = reg_base;
|
|
#endif
|
|
|
|
/* Initialize the wait queue */
|
|
init_waitqueue_head(&subdevice->wait_queue);
|
|
|
|
/* Request the interrupt line */
|
|
err = request_irq(irq, me8200_do_isr,
|
|
#ifdef IRQF_DISABLED
|
|
IRQF_DISABLED | IRQF_SHARED,
|
|
#else
|
|
SA_INTERRUPT | SA_SHIRQ,
|
|
#endif
|
|
ME8200_NAME, (void *)subdevice);
|
|
|
|
if (err) {
|
|
PERROR("Cannot get interrupt line.\n");
|
|
kfree(subdevice);
|
|
return NULL;
|
|
}
|
|
PINFO("Registered irq=%d.\n", irq);
|
|
|
|
/* Overload base class methods. */
|
|
subdevice->base.me_subdevice_io_irq_start = me8200_do_io_irq_start;
|
|
subdevice->base.me_subdevice_io_irq_wait = me8200_do_io_irq_wait;
|
|
subdevice->base.me_subdevice_io_irq_stop = me8200_do_io_irq_stop;
|
|
subdevice->base.me_subdevice_io_reset_subdevice =
|
|
me8200_do_io_reset_subdevice;
|
|
subdevice->base.me_subdevice_io_single_config =
|
|
me8200_do_io_single_config;
|
|
subdevice->base.me_subdevice_io_single_read = me8200_do_io_single_read;
|
|
subdevice->base.me_subdevice_io_single_write =
|
|
me8200_do_io_single_write;
|
|
subdevice->base.me_subdevice_query_number_channels =
|
|
me8200_do_query_number_channels;
|
|
subdevice->base.me_subdevice_query_subdevice_type =
|
|
me8200_do_query_subdevice_type;
|
|
subdevice->base.me_subdevice_query_subdevice_caps =
|
|
me8200_do_query_subdevice_caps;
|
|
subdevice->base.me_subdevice_destructor = me8200_do_destructor;
|
|
|
|
subdevice->rised = 0;
|
|
subdevice->count = 0;
|
|
|
|
return subdevice;
|
|
}
|