[mirror_ubuntu-zesty-kernel.git] / drivers / staging / meilhaus / me8200_do.c

/**
 * @file me8200_do.c
 *
 * @brief ME-8200 digital output subdevice instance.
 * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
 * @author Guenter Gebhardt
 * @author Krzysztof Gantzke	(k.gantzke@meilhaus.de)
 */

/*
 * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
 *
 * This file 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifndef __KERNEL__
#  define __KERNEL__
#endif

/*
 * Includes
 */
#include <linux/module.h>

#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/types.h>

#include "medefines.h"
#include "meinternal.h"
#include "meerror.h"

#include "meids.h"
#include "medebug.h"
#include "me8200_reg.h"
#include "me8200_do_reg.h"
#include "me8200_do.h"

/*
 * Defines
 */

/*
 * Functions
 */

static int me8200_do_io_irq_start(me_subdevice_t *subdevice,
				  struct file *filep,
				  int channel,
				  int irq_source,
				  int irq_edge, int irq_arg, int flags)
{
	me8200_do_subdevice_t *instance;
	int err = ME_ERRNO_SUCCESS;
	uint8_t tmp;
	unsigned long status;

	if (flags & ~ME_IO_IRQ_START_DIO_BYTE) {
		PERROR("Invalid flag specified.\n");
		return ME_ERRNO_INVALID_FLAGS;
	}

	if (channel != 0) {
		PERROR("Invalid channel specified.\n");
		return ME_ERRNO_INVALID_CHANNEL;
	}

	if (irq_source != ME_IRQ_SOURCE_DIO_OVER_TEMP) {
		PERROR("Invalid interrupt source specified.\n");
		return ME_ERRNO_INVALID_IRQ_SOURCE;
	}

	PDEBUG("executed.\n");

	instance = (me8200_do_subdevice_t *) subdevice;

	ME_SUBDEVICE_ENTER;

	spin_lock_irqsave(&instance->subdevice_lock, status);
	spin_lock(instance->irq_mode_lock);
	tmp = inb(instance->irq_ctrl_reg);
	tmp |=
	    ME8200_IRQ_MODE_BIT_ENABLE_POWER << (ME8200_IRQ_MODE_POWER_SHIFT *
						 instance->do_idx);
	outb(tmp, instance->irq_ctrl_reg);
	PDEBUG_REG("irq_ctrl_reg outb(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
		   instance->irq_ctrl_reg - instance->reg_base, tmp);
	spin_unlock(instance->irq_mode_lock);
	instance->rised = 0;
	spin_unlock_irqrestore(&instance->subdevice_lock, status);

	ME_SUBDEVICE_EXIT;

	return err;
}

static int me8200_do_io_irq_wait(me_subdevice_t *subdevice,
				 struct file *filep,
				 int channel,
				 int *irq_count,
				 int *value, int time_out, int flags)
{
	me8200_do_subdevice_t *instance;
	int err = ME_ERRNO_SUCCESS;
	long t = 0;
	unsigned long cpu_flags;

	PDEBUG("executed.\n");

	instance = (me8200_do_subdevice_t *) subdevice;

	if (flags) {
		PERROR("Invalid flag specified.\n");
		return ME_ERRNO_INVALID_FLAGS;
	}

	if (time_out < 0) {
		PERROR("Invalid time_out specified.\n");
		return ME_ERRNO_INVALID_TIMEOUT;
	}

	if (time_out) {
		t = (time_out * HZ) / 1000;

		if (t == 0)
			t = 1;
	}

	ME_SUBDEVICE_ENTER;

	if (instance->rised <= 0) {
		instance->rised = 0;

		if (time_out) {
			t = wait_event_interruptible_timeout(instance->
							     wait_queue,
							     (instance->rised !=
							      0), t);

			if (t == 0) {
				PERROR
				    ("Wait on external interrupt timed out.\n");
				err = ME_ERRNO_TIMEOUT;
			}
		} else {
			wait_event_interruptible(instance->wait_queue,
						 (instance->rised != 0));
		}

		if (instance->rised < 0) {
			PERROR("Wait on interrupt aborted by user.\n");
			err = ME_ERRNO_CANCELLED;
		}
	}

	if (signal_pending(current)) {
		PERROR("Wait on external interrupt aborted by signal.\n");
		err = ME_ERRNO_SIGNAL;
	}

	spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
	instance->rised = 0;
	*irq_count = instance->count;
	*value = 0;
	spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);

	ME_SUBDEVICE_EXIT;

	return err;
}

static int me8200_do_io_irq_stop(me_subdevice_t *subdevice,
				 struct file *filep, int channel, int flags)
{
	me8200_do_subdevice_t *instance;
	uint8_t tmp;
	unsigned long cpu_flags;

	PDEBUG("executed.\n");

	instance = (me8200_do_subdevice_t *) subdevice;

	if (flags) {
		PERROR("Invalid flag specified.\n");
		return ME_ERRNO_INVALID_FLAGS;
	}

	ME_SUBDEVICE_ENTER;

	spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
	spin_lock(instance->irq_mode_lock);
	tmp = inb(instance->irq_ctrl_reg);
	tmp &=
	    ~(ME8200_IRQ_MODE_BIT_ENABLE_POWER <<
	      (ME8200_IRQ_MODE_POWER_SHIFT * instance->do_idx));
	outb(tmp, instance->irq_ctrl_reg);
	PDEBUG_REG("irq_ctrl_reg outb(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
		   instance->irq_ctrl_reg - instance->reg_base, tmp);
	spin_unlock(instance->irq_mode_lock);
	instance->rised = -1;
	spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
	wake_up_interruptible_all(&instance->wait_queue);

	ME_SUBDEVICE_EXIT;

	return ME_ERRNO_SUCCESS;
}

static int me8200_do_io_reset_subdevice(struct me_subdevice *subdevice,
					struct file *filep, int flags)
{
	me8200_do_subdevice_t *instance;
	unsigned long cpu_flags;
	uint8_t tmp;

	PDEBUG("executed.\n");

	instance = (me8200_do_subdevice_t *) subdevice;

	if (flags) {
		PERROR("Invalid flag specified.\n");
		return ME_ERRNO_INVALID_FLAGS;
	}

	ME_SUBDEVICE_ENTER;

	spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
	outb(0x00, instance->port_reg);
	PDEBUG_REG("port_reg outb(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
		   instance->port_reg - instance->reg_base, 0x00);
	spin_lock(instance->irq_mode_lock);
	tmp = inb(instance->irq_ctrl_reg);
	tmp &=
	    ~(ME8200_IRQ_MODE_BIT_ENABLE_POWER <<
	      (ME8200_IRQ_MODE_POWER_SHIFT * instance->do_idx));
	outb(tmp, instance->irq_ctrl_reg);
	PDEBUG_REG("irq_ctrl_reg outb(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
		   instance->irq_ctrl_reg - instance->reg_base, tmp);
	spin_unlock(instance->irq_mode_lock);
	instance->rised = -1;
	instance->count = 0;
	spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
	wake_up_interruptible_all(&instance->wait_queue);

	ME_SUBDEVICE_EXIT;

	return ME_ERRNO_SUCCESS;
}

static int me8200_do_io_single_config(me_subdevice_t *subdevice,
				      struct file *filep,
				      int channel,
				      int single_config,
				      int ref,
				      int trig_chan,
				      int trig_type, int trig_edge, int flags)
{
	me8200_do_subdevice_t *instance;
	int err = ME_ERRNO_SUCCESS;
	unsigned long status;

	PDEBUG("executed.\n");

	instance = (me8200_do_subdevice_t *) subdevice;

	ME_SUBDEVICE_ENTER;

	spin_lock_irqsave(&instance->subdevice_lock, status);
	switch (flags) {
	case ME_IO_SINGLE_CONFIG_NO_FLAGS:
	case ME_IO_SINGLE_CONFIG_DIO_BYTE:
		if (channel == 0) {
			if (single_config == ME_SINGLE_CONFIG_DIO_OUTPUT) {
			} else {
				PERROR("Invalid byte direction specified.\n");
				err = ME_ERRNO_INVALID_SINGLE_CONFIG;
			}
		} else {
			PERROR("Invalid byte specified.\n");
			err = ME_ERRNO_INVALID_CHANNEL;
		}
		break;

	default:
		PERROR("Invalid flags specified.\n");
		err = ME_ERRNO_INVALID_FLAGS;
	}
	spin_unlock_irqrestore(&instance->subdevice_lock, status);

	ME_SUBDEVICE_EXIT;

	return err;
}

static int me8200_do_io_single_read(me_subdevice_t *subdevice,
				    struct file *filep,
				    int channel,
				    int *value, int time_out, int flags)
{
	me8200_do_subdevice_t *instance;
	int err = ME_ERRNO_SUCCESS;
	unsigned long status;

	PDEBUG("executed.\n");

	instance = (me8200_do_subdevice_t *) subdevice;

	ME_SUBDEVICE_ENTER;

	spin_lock_irqsave(&instance->subdevice_lock, status);
	switch (flags) {
	case ME_IO_SINGLE_TYPE_DIO_BIT:
		if ((channel >= 0) && (channel < 8)) {
			*value = inb(instance->port_reg) & (0x1 << channel);
		} else {
			PERROR("Invalid bit number specified.\n");
			err = ME_ERRNO_INVALID_CHANNEL;
		}
		break;

	case ME_IO_SINGLE_NO_FLAGS:
	case ME_IO_SINGLE_TYPE_DIO_BYTE:
		if (channel == 0) {
			*value = inb(instance->port_reg);
		} else {
			PERROR("Invalid byte number specified.\n");
			err = ME_ERRNO_INVALID_CHANNEL;
		}
		break;

	default:
		PERROR("Invalid flags specified.\n");
		err = ME_ERRNO_INVALID_FLAGS;
	}
	spin_unlock_irqrestore(&instance->subdevice_lock, status);

	ME_SUBDEVICE_EXIT;

	return err;
}

static int me8200_do_io_single_write(me_subdevice_t *subdevice,
				     struct file *filep,
				     int channel,
				     int value, int time_out, int flags)
{
	me8200_do_subdevice_t *instance;
	int err = ME_ERRNO_SUCCESS;
	uint8_t state;
	unsigned long status;

	PDEBUG("executed.\n");

	instance = (me8200_do_subdevice_t *) subdevice;

	ME_SUBDEVICE_ENTER;

	spin_lock_irqsave(&instance->subdevice_lock, status);
	switch (flags) {
	case ME_IO_SINGLE_TYPE_DIO_BIT:
		if ((channel >= 0) && (channel < 8)) {
			state = inb(instance->port_reg);
			state =
			    value ? (state | (0x1 << channel)) : (state &
								  ~(0x1 <<
								    channel));
			outb(state, instance->port_reg);
			PDEBUG_REG("port_reg outb(0x%lX+0x%lX)=0x%x\n",
				   instance->reg_base,
				   instance->port_reg - instance->reg_base,
				   state);
		} else {
			PERROR("Invalid bit number specified.\n");
			err = ME_ERRNO_INVALID_CHANNEL;
		}
		break;

	case ME_IO_SINGLE_NO_FLAGS:
	case ME_IO_SINGLE_TYPE_DIO_BYTE:
		if (channel == 0) {
			outb(value, instance->port_reg);
			PDEBUG_REG("port_reg outb(0x%lX+0x%lX)=0x%x\n",
				   instance->reg_base,
				   instance->port_reg - instance->reg_base,
				   value);
		} else {
			PERROR("Invalid byte number specified.\n");
			err = ME_ERRNO_INVALID_CHANNEL;
		}
		break;

	default:
		PERROR("Invalid flags specified.\n");
		err = ME_ERRNO_INVALID_FLAGS;
	}
	spin_unlock_irqrestore(&instance->subdevice_lock, status);

	ME_SUBDEVICE_EXIT;

	return err;
}

static int me8200_do_query_number_channels(me_subdevice_t *subdevice,
					   int *number)
{
	PDEBUG("executed.\n");
	*number = 8;
	return ME_ERRNO_SUCCESS;
}

static int me8200_do_query_subdevice_type(me_subdevice_t *subdevice,
					  int *type, int *subtype)
{
	PDEBUG("executed.\n");
	*type = ME_TYPE_DO;
	*subtype = ME_SUBTYPE_SINGLE;
	return ME_ERRNO_SUCCESS;
}

static int me8200_do_query_subdevice_caps(me_subdevice_t *subdevice, int *caps)
{
	PDEBUG("executed.\n");
	*caps = ME_CAPS_DIO_OVER_TEMP_IRQ;
	return ME_ERRNO_SUCCESS;
}

static void me8200_do_destructor(struct me_subdevice *subdevice)
{
	me8200_do_subdevice_t *instance;

	PDEBUG("executed.\n");

	instance = (me8200_do_subdevice_t *) subdevice;

	free_irq(instance->irq, (void *)instance);
	me_subdevice_deinit(&instance->base);
	kfree(instance);
}

static irqreturn_t me8200_do_isr(int irq, void *dev_id)
{
	me8200_do_subdevice_t *instance;
	uint16_t ctrl;
	uint8_t irq_status;

	instance = (me8200_do_subdevice_t *) dev_id;

	if (irq != instance->irq) {
		PERROR("Incorrect interrupt num: %d.\n", irq);
		return IRQ_NONE;
	}

	irq_status = inb(instance->irq_status_reg);
	if (!
	    (irq_status &
	     (ME8200_DO_IRQ_STATUS_BIT_ACTIVE << instance->do_idx))) {
		PINFO
		    ("%ld Shared interrupt. %s(): idx=%d irq_status_reg=0x%04X\n",
		     jiffies, __func__, instance->do_idx, irq_status);
		return IRQ_NONE;
	}

	PDEBUG("executed.\n");

	spin_lock(&instance->subdevice_lock);
	instance->rised = 1;
	instance->count++;

	spin_lock(instance->irq_mode_lock);
	ctrl = inw(instance->irq_ctrl_reg);
	ctrl |= ME8200_IRQ_MODE_BIT_CLEAR_POWER << instance->do_idx;
	outw(ctrl, instance->irq_ctrl_reg);
	PDEBUG_REG("irq_ctrl_reg outw(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
		   instance->irq_ctrl_reg - instance->reg_base, ctrl);
	ctrl &= ~(ME8200_IRQ_MODE_BIT_CLEAR_POWER << instance->do_idx);
	outw(ctrl, instance->irq_ctrl_reg);
	PDEBUG_REG("irq_ctrl_reg outw(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
		   instance->irq_ctrl_reg - instance->reg_base, ctrl);
	spin_unlock(instance->irq_mode_lock);
	spin_unlock(&instance->subdevice_lock);
	wake_up_interruptible_all(&instance->wait_queue);

	return IRQ_HANDLED;
}

me8200_do_subdevice_t *me8200_do_constructor(uint32_t reg_base,
					     unsigned int do_idx,
					     int irq,
					     spinlock_t *irq_mode_lock)
{
	me8200_do_subdevice_t *subdevice;
	int err;

	PDEBUG("executed.\n");

	/* Allocate memory for subdevice instance */
	subdevice = kmalloc(sizeof(me8200_do_subdevice_t), GFP_KERNEL);

	if (!subdevice) {
		PERROR("Cannot get memory for subdevice instance.\n");
		return NULL;
	}

	memset(subdevice, 0, sizeof(me8200_do_subdevice_t));

	/* Initialize subdevice base class */
	err = me_subdevice_init(&subdevice->base);

	if (err) {
		PERROR("Cannot initialize subdevice base class instance.\n");
		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,
			  IRQF_DISABLED | IRQF_SHARED,
			  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;
}
Commit	Line	Data
3fedd148 DK	1	/**
	2	* @file me8200_do.c
	3	*
	4	* @brief ME-8200 digital output subdevice instance.
	5	* @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
	6	* @author Guenter Gebhardt
	7	* @author Krzysztof Gantzke (k.gantzke@meilhaus.de)
	8	*/
	9
	10	/*
	11	* Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
	12	*
	13	* This file is free software; you can redistribute it and/or modify
	14	* it under the terms of the GNU General Public License as published by
	15	* the Free Software Foundation; either version 2 of the License, or
	16	* (at your option) any later version.
	17	*
	18	* This program is distributed in the hope that it will be useful,
	19	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	20	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	21	* GNU General Public License for more details.
	22	*
	23	* You should have received a copy of the GNU General Public License
	24	* along with this program; if not, write to the Free Software
	25	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	26	*/
	27
	28	#ifndef __KERNEL__
	29	# define __KERNEL__
	30	#endif
	31
	32	/*
	33	* Includes
	34	*/
	35	#include <linux/module.h>
	36
	37	#include <linux/slab.h>
	38	#include <linux/spinlock.h>
	39	#include <linux/interrupt.h>
451084d2	40	#include <linux/io.h>
3fedd148	41	#include <linux/types.h>
3fedd148 DK	42
	43	#include "medefines.h"
	44	#include "meinternal.h"
	45	#include "meerror.h"
	46
	47	#include "meids.h"
	48	#include "medebug.h"
	49	#include "me8200_reg.h"
	50	#include "me8200_do_reg.h"
	51	#include "me8200_do.h"
	52
	53	/*
	54	* Defines
	55	*/
	56
	57	/*
	58	* Functions
	59	*/
	60
451084d2	61	static int me8200_do_io_irq_start(me_subdevice_t *subdevice,
3fedd148 DK	62	struct file *filep,
	63	int channel,
	64	int irq_source,
	65	int irq_edge, int irq_arg, int flags)
	66	{
	67	me8200_do_subdevice_t *instance;
	68	int err = ME_ERRNO_SUCCESS;
	69	uint8_t tmp;
	70	unsigned long status;
	71
	72	if (flags & ~ME_IO_IRQ_START_DIO_BYTE) {
	73	PERROR("Invalid flag specified.\n");
	74	return ME_ERRNO_INVALID_FLAGS;
	75	}
	76
	77	if (channel != 0) {
	78	PERROR("Invalid channel specified.\n");
	79	return ME_ERRNO_INVALID_CHANNEL;
	80	}
	81
	82	if (irq_source != ME_IRQ_SOURCE_DIO_OVER_TEMP) {
	83	PERROR("Invalid interrupt source specified.\n");
	84	return ME_ERRNO_INVALID_IRQ_SOURCE;
	85	}
	86
	87	PDEBUG("executed.\n");
	88
	89	instance = (me8200_do_subdevice_t *) subdevice;
	90
	91	ME_SUBDEVICE_ENTER;
	92
	93	spin_lock_irqsave(&instance->subdevice_lock, status);
	94	spin_lock(instance->irq_mode_lock);
	95	tmp = inb(instance->irq_ctrl_reg);
	96	tmp \|=
	97	ME8200_IRQ_MODE_BIT_ENABLE_POWER << (ME8200_IRQ_MODE_POWER_SHIFT *
	98	instance->do_idx);
	99	outb(tmp, instance->irq_ctrl_reg);
	100	PDEBUG_REG("irq_ctrl_reg outb(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
	101	instance->irq_ctrl_reg - instance->reg_base, tmp);
	102	spin_unlock(instance->irq_mode_lock);
	103	instance->rised = 0;
	104	spin_unlock_irqrestore(&instance->subdevice_lock, status);
	105
	106	ME_SUBDEVICE_EXIT;
	107
	108	return err;
	109	}
	110
451084d2	111	static int me8200_do_io_irq_wait(me_subdevice_t *subdevice,
3fedd148 DK	112	struct file *filep,
	113	int channel,
	114	int *irq_count,
	115	int *value, int time_out, int flags)
	116	{
	117	me8200_do_subdevice_t *instance;
	118	int err = ME_ERRNO_SUCCESS;
	119	long t = 0;
	120	unsigned long cpu_flags;
	121
	122	PDEBUG("executed.\n");
	123
	124	instance = (me8200_do_subdevice_t *) subdevice;
	125
	126	if (flags) {
	127	PERROR("Invalid flag specified.\n");
	128	return ME_ERRNO_INVALID_FLAGS;
	129	}
	130
	131	if (time_out < 0) {
	132	PERROR("Invalid time_out specified.\n");
	133	return ME_ERRNO_INVALID_TIMEOUT;
	134	}
	135
	136	if (time_out) {
	137	t = (time_out * HZ) / 1000;
	138
	139	if (t == 0)
	140	t = 1;
	141	}
	142
	143	ME_SUBDEVICE_ENTER;
	144
	145	if (instance->rised <= 0) {
	146	instance->rised = 0;
	147
	148	if (time_out) {
	149	t = wait_event_interruptible_timeout(instance->
	150	wait_queue,
	151	(instance->rised !=
	152	0), t);
	153
	154	if (t == 0) {
	155	PERROR
	156	("Wait on external interrupt timed out.\n");
	157	err = ME_ERRNO_TIMEOUT;
	158	}
	159	} else {
	160	wait_event_interruptible(instance->wait_queue,
	161	(instance->rised != 0));
	162	}
	163
	164	if (instance->rised < 0) {
	165	PERROR("Wait on interrupt aborted by user.\n");
	166	err = ME_ERRNO_CANCELLED;
	167	}
	168	}
	169
	170	if (signal_pending(current)) {
	171	PERROR("Wait on external interrupt aborted by signal.\n");
	172	err = ME_ERRNO_SIGNAL;
	173	}
	174
	175	spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
176	instance->rised = 0;
177	*irq_count = instance->count;
178	*value = 0;
179	spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
180
181	ME_SUBDEVICE_EXIT;
182
183	return err;
184	}
185
451084d2	186	static int me8200_do_io_irq_stop(me_subdevice_t *subdevice,
3fedd148 DK	187	struct file *filep, int channel, int flags)
	188	{
	189	me8200_do_subdevice_t *instance;
	190	uint8_t tmp;
	191	unsigned long cpu_flags;
	192
	193	PDEBUG("executed.\n");
	194
	195	instance = (me8200_do_subdevice_t *) subdevice;
	196
	197	if (flags) {
	198	PERROR("Invalid flag specified.\n");
	199	return ME_ERRNO_INVALID_FLAGS;
	200	}
	201
	202	ME_SUBDEVICE_ENTER;
	203
	204	spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
	205	spin_lock(instance->irq_mode_lock);
	206	tmp = inb(instance->irq_ctrl_reg);
	207	tmp &=
	208	~(ME8200_IRQ_MODE_BIT_ENABLE_POWER <<
	209	(ME8200_IRQ_MODE_POWER_SHIFT * instance->do_idx));
	210	outb(tmp, instance->irq_ctrl_reg);
	211	PDEBUG_REG("irq_ctrl_reg outb(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
	212	instance->irq_ctrl_reg - instance->reg_base, tmp);
	213	spin_unlock(instance->irq_mode_lock);
	214	instance->rised = -1;
	215	spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
	216	wake_up_interruptible_all(&instance->wait_queue);
	217
	218	ME_SUBDEVICE_EXIT;
	219
	220	return ME_ERRNO_SUCCESS;
	221	}
	222
	223	static int me8200_do_io_reset_subdevice(struct me_subdevice *subdevice,
	224	struct file *filep, int flags)
	225	{
	226	me8200_do_subdevice_t *instance;
	227	unsigned long cpu_flags;
	228	uint8_t tmp;
	229
	230	PDEBUG("executed.\n");
	231
	232	instance = (me8200_do_subdevice_t *) subdevice;
	233
	234	if (flags) {
	235	PERROR("Invalid flag specified.\n");
	236	return ME_ERRNO_INVALID_FLAGS;
	237	}
	238
	239	ME_SUBDEVICE_ENTER;
	240
	241	spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
	242	outb(0x00, instance->port_reg);
	243	PDEBUG_REG("port_reg outb(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
	244	instance->port_reg - instance->reg_base, 0x00);
	245	spin_lock(instance->irq_mode_lock);
	246	tmp = inb(instance->irq_ctrl_reg);
	247	tmp &=
	248	~(ME8200_IRQ_MODE_BIT_ENABLE_POWER <<
	249	(ME8200_IRQ_MODE_POWER_SHIFT * instance->do_idx));
	250	outb(tmp, instance->irq_ctrl_reg);
251	PDEBUG_REG("irq_ctrl_reg outb(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
252	instance->irq_ctrl_reg - instance->reg_base, tmp);
253	spin_unlock(instance->irq_mode_lock);
254	instance->rised = -1;
255	instance->count = 0;
256	spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
257	wake_up_interruptible_all(&instance->wait_queue);
258
259	ME_SUBDEVICE_EXIT;
260
261	return ME_ERRNO_SUCCESS;
262	}
263
451084d2	264	static int me8200_do_io_single_config(me_subdevice_t *subdevice,
3fedd148 DK	265	struct file *filep,
	266	int channel,
	267	int single_config,
	268	int ref,
	269	int trig_chan,
	270	int trig_type, int trig_edge, int flags)
	271	{
	272	me8200_do_subdevice_t *instance;
	273	int err = ME_ERRNO_SUCCESS;
	274	unsigned long status;
	275
	276	PDEBUG("executed.\n");
	277
	278	instance = (me8200_do_subdevice_t *) subdevice;
	279
	280	ME_SUBDEVICE_ENTER;
	281
	282	spin_lock_irqsave(&instance->subdevice_lock, status);
	283	switch (flags) {
	284	case ME_IO_SINGLE_CONFIG_NO_FLAGS:
	285	case ME_IO_SINGLE_CONFIG_DIO_BYTE:
	286	if (channel == 0) {
	287	if (single_config == ME_SINGLE_CONFIG_DIO_OUTPUT) {
	288	} else {
	289	PERROR("Invalid byte direction specified.\n");
	290	err = ME_ERRNO_INVALID_SINGLE_CONFIG;
	291	}
	292	} else {
	293	PERROR("Invalid byte specified.\n");
	294	err = ME_ERRNO_INVALID_CHANNEL;
	295	}
	296	break;
	297
	298	default:
	299	PERROR("Invalid flags specified.\n");
	300	err = ME_ERRNO_INVALID_FLAGS;
	301	}
	302	spin_unlock_irqrestore(&instance->subdevice_lock, status);
	303
	304	ME_SUBDEVICE_EXIT;
	305
	306	return err;
	307	}
	308
451084d2	309	static int me8200_do_io_single_read(me_subdevice_t *subdevice,
3fedd148 DK	310	struct file *filep,
	311	int channel,
	312	int *value, int time_out, int flags)
	313	{
	314	me8200_do_subdevice_t *instance;
	315	int err = ME_ERRNO_SUCCESS;
	316	unsigned long status;
	317
	318	PDEBUG("executed.\n");
	319
	320	instance = (me8200_do_subdevice_t *) subdevice;
	321
	322	ME_SUBDEVICE_ENTER;
	323
	324	spin_lock_irqsave(&instance->subdevice_lock, status);
	325	switch (flags) {
	326	case ME_IO_SINGLE_TYPE_DIO_BIT:
	327	if ((channel >= 0) && (channel < 8)) {
	328	*value = inb(instance->port_reg) & (0x1 << channel);
	329	} else {
	330	PERROR("Invalid bit number specified.\n");
	331	err = ME_ERRNO_INVALID_CHANNEL;
	332	}
	333	break;
	334
	335	case ME_IO_SINGLE_NO_FLAGS:
	336	case ME_IO_SINGLE_TYPE_DIO_BYTE:
	337	if (channel == 0) {
	338	*value = inb(instance->port_reg);
	339	} else {
	340	PERROR("Invalid byte number specified.\n");
	341	err = ME_ERRNO_INVALID_CHANNEL;
	342	}
	343	break;
	344
	345	default:
	346	PERROR("Invalid flags specified.\n");
	347	err = ME_ERRNO_INVALID_FLAGS;
	348	}
	349	spin_unlock_irqrestore(&instance->subdevice_lock, status);
	350
	351	ME_SUBDEVICE_EXIT;
	352
	353	return err;
	354	}
	355
451084d2	356	static int me8200_do_io_single_write(me_subdevice_t *subdevice,
3fedd148 DK	357	struct file *filep,
	358	int channel,
	359	int value, int time_out, int flags)
	360	{
	361	me8200_do_subdevice_t *instance;
	362	int err = ME_ERRNO_SUCCESS;
	363	uint8_t state;
	364	unsigned long status;
	365
	366	PDEBUG("executed.\n");
	367
	368	instance = (me8200_do_subdevice_t *) subdevice;
	369
	370	ME_SUBDEVICE_ENTER;
	371
	372	spin_lock_irqsave(&instance->subdevice_lock, status);
	373	switch (flags) {
	374	case ME_IO_SINGLE_TYPE_DIO_BIT:
	375	if ((channel >= 0) && (channel < 8)) {
	376	state = inb(instance->port_reg);
	377	state =
	378	value ? (state \| (0x1 << channel)) : (state &
	379	~(0x1 <<
	380	channel));
	381	outb(state, instance->port_reg);
	382	PDEBUG_REG("port_reg outb(0x%lX+0x%lX)=0x%x\n",
	383	instance->reg_base,
	384	instance->port_reg - instance->reg_base,
	385	state);
	386	} else {
	387	PERROR("Invalid bit number specified.\n");
	388	err = ME_ERRNO_INVALID_CHANNEL;
	389	}
	390	break;
	391
	392	case ME_IO_SINGLE_NO_FLAGS:
	393	case ME_IO_SINGLE_TYPE_DIO_BYTE:
	394	if (channel == 0) {
	395	outb(value, instance->port_reg);
	396	PDEBUG_REG("port_reg outb(0x%lX+0x%lX)=0x%x\n",
	397	instance->reg_base,
	398	instance->port_reg - instance->reg_base,
	399	value);
	400	} else {
	401	PERROR("Invalid byte number specified.\n");
	402	err = ME_ERRNO_INVALID_CHANNEL;
	403	}
	404	break;
	405
	406	default:
	407	PERROR("Invalid flags specified.\n");
	408	err = ME_ERRNO_INVALID_FLAGS;
	409	}
	410	spin_unlock_irqrestore(&instance->subdevice_lock, status);
	411
	412	ME_SUBDEVICE_EXIT;
	413
	414	return err;
	415	}
	416
451084d2	417	static int me8200_do_query_number_channels(me_subdevice_t *subdevice,
3fedd148 DK	418	int *number)
	419	{
	420	PDEBUG("executed.\n");
	421	*number = 8;
	422	return ME_ERRNO_SUCCESS;
	423	}
	424
451084d2	425	static int me8200_do_query_subdevice_type(me_subdevice_t *subdevice,
3fedd148 DK	426	int type, int subtype)
	427	{
	428	PDEBUG("executed.\n");
	429	*type = ME_TYPE_DO;
	430	*subtype = ME_SUBTYPE_SINGLE;
	431	return ME_ERRNO_SUCCESS;
	432	}
	433
451084d2	434	static int me8200_do_query_subdevice_caps(me_subdevice_t subdevice, int caps)
3fedd148 DK	435	{
	436	PDEBUG("executed.\n");
	437	*caps = ME_CAPS_DIO_OVER_TEMP_IRQ;
	438	return ME_ERRNO_SUCCESS;
	439	}
	440
	441	static void me8200_do_destructor(struct me_subdevice *subdevice)
	442	{
	443	me8200_do_subdevice_t *instance;
	444
	445	PDEBUG("executed.\n");
	446
	447	instance = (me8200_do_subdevice_t *) subdevice;
	448
	449	free_irq(instance->irq, (void *)instance);
	450	me_subdevice_deinit(&instance->base);
	451	kfree(instance);
	452	}
	453
3fedd148	454	static irqreturn_t me8200_do_isr(int irq, void *dev_id)
3fedd148 DK	455	{
	456	me8200_do_subdevice_t *instance;
	457	uint16_t ctrl;
	458	uint8_t irq_status;
	459
	460	instance = (me8200_do_subdevice_t *) dev_id;
	461
	462	if (irq != instance->irq) {
	463	PERROR("Incorrect interrupt num: %d.\n", irq);
	464	return IRQ_NONE;
	465	}
	466
	467	irq_status = inb(instance->irq_status_reg);
	468	if (!
	469	(irq_status &
	470	(ME8200_DO_IRQ_STATUS_BIT_ACTIVE << instance->do_idx))) {
	471	PINFO
	472	("%ld Shared interrupt. %s(): idx=%d irq_status_reg=0x%04X\n",
d599edca	473	jiffies, __func__, instance->do_idx, irq_status);
3fedd148 DK	474	return IRQ_NONE;
	475	}
	476
	477	PDEBUG("executed.\n");
	478
	479	spin_lock(&instance->subdevice_lock);
	480	instance->rised = 1;
	481	instance->count++;
	482
	483	spin_lock(instance->irq_mode_lock);
	484	ctrl = inw(instance->irq_ctrl_reg);
	485	ctrl \|= ME8200_IRQ_MODE_BIT_CLEAR_POWER << instance->do_idx;
	486	outw(ctrl, instance->irq_ctrl_reg);
	487	PDEBUG_REG("irq_ctrl_reg outw(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
	488	instance->irq_ctrl_reg - instance->reg_base, ctrl);
	489	ctrl &= ~(ME8200_IRQ_MODE_BIT_CLEAR_POWER << instance->do_idx);
	490	outw(ctrl, instance->irq_ctrl_reg);
	491	PDEBUG_REG("irq_ctrl_reg outw(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
	492	instance->irq_ctrl_reg - instance->reg_base, ctrl);
	493	spin_unlock(instance->irq_mode_lock);
	494	spin_unlock(&instance->subdevice_lock);
	495	wake_up_interruptible_all(&instance->wait_queue);
	496
	497	return IRQ_HANDLED;
	498	}
	499
	500	me8200_do_subdevice_t *me8200_do_constructor(uint32_t reg_base,
	501	unsigned int do_idx,
	502	int irq,
451084d2	503	spinlock_t *irq_mode_lock)
3fedd148 DK	504	{
	505	me8200_do_subdevice_t *subdevice;
	506	int err;
	507
	508	PDEBUG("executed.\n");
	509
	510	/* Allocate memory for subdevice instance */
	511	subdevice = kmalloc(sizeof(me8200_do_subdevice_t), GFP_KERNEL);
	512
	513	if (!subdevice) {
	514	PERROR("Cannot get memory for subdevice instance.\n");
	515	return NULL;
	516	}
	517
	518	memset(subdevice, 0, sizeof(me8200_do_subdevice_t));
	519
	520	/* Initialize subdevice base class */
	521	err = me_subdevice_init(&subdevice->base);
	522
	523	if (err) {
	524	PERROR("Cannot initialize subdevice base class instance.\n");
	525	kfree(subdevice);
	526	return NULL;
	527	}
	528	// Initialize spin locks.
	529	spin_lock_init(&subdevice->subdevice_lock);
	530
	531	subdevice->irq_mode_lock = irq_mode_lock;
	532
	533	/* Save the index of the digital output */
	534	subdevice->do_idx = do_idx;
	535	subdevice->irq = irq;
	536
	537	/* Initialize the registers */
	538	if (do_idx == 0) {
	539	subdevice->port_reg = reg_base + ME8200_DO_PORT_0_REG;
	540	} else if (do_idx == 1) {
	541	subdevice->port_reg = reg_base + ME8200_DO_PORT_1_REG;
	542	} else {
	543	PERROR("Wrong subdevice idx=%d.\n", do_idx);
	544	kfree(subdevice);
	545	return NULL;
	546	}
	547	subdevice->irq_ctrl_reg = reg_base + ME8200_IRQ_MODE_REG;
	548	subdevice->irq_status_reg = reg_base + ME8200_DO_IRQ_STATUS_REG;
	549	#ifdef MEDEBUG_DEBUG_REG
	550	subdevice->reg_base = reg_base;
	551	#endif
	552
	553	/* Initialize the wait queue */
	554	init_waitqueue_head(&subdevice->wait_queue);
	555
	556	/* Request the interrupt line */
	557	err = request_irq(irq, me8200_do_isr,
3fedd148	558	IRQF_DISABLED \| IRQF_SHARED,
3fedd148 DK	559	ME8200_NAME, (void *)subdevice);
	560
	561	if (err) {
	562	PERROR("Cannot get interrupt line.\n");
	563	kfree(subdevice);
	564	return NULL;
	565	}
	566	PINFO("Registered irq=%d.\n", irq);
	567
	568	/* Overload base class methods. */
	569	subdevice->base.me_subdevice_io_irq_start = me8200_do_io_irq_start;
	570	subdevice->base.me_subdevice_io_irq_wait = me8200_do_io_irq_wait;
	571	subdevice->base.me_subdevice_io_irq_stop = me8200_do_io_irq_stop;
	572	subdevice->base.me_subdevice_io_reset_subdevice =
	573	me8200_do_io_reset_subdevice;
	574	subdevice->base.me_subdevice_io_single_config =
	575	me8200_do_io_single_config;
	576	subdevice->base.me_subdevice_io_single_read = me8200_do_io_single_read;
	577	subdevice->base.me_subdevice_io_single_write =
	578	me8200_do_io_single_write;
	579	subdevice->base.me_subdevice_query_number_channels =
	580	me8200_do_query_number_channels;
	581	subdevice->base.me_subdevice_query_subdevice_type =
	582	me8200_do_query_subdevice_type;
	583	subdevice->base.me_subdevice_query_subdevice_caps =
	584	me8200_do_query_subdevice_caps;
	585	subdevice->base.me_subdevice_destructor = me8200_do_destructor;
	586
	587	subdevice->rised = 0;
	588	subdevice->count = 0;
	589
	590	return subdevice;
	591	}