451084d2e0
Cc: David Kiliani <mail@davidkiliani.de> Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
475 lines
11 KiB
C
475 lines
11 KiB
C
/**
|
|
* @file me0600_ext_irq.c
|
|
*
|
|
* @brief ME-630 external interrupt 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/version.h>
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/slab.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/io.h>
|
|
#include <linux/types.h>
|
|
#include <linux/interrupt.h>
|
|
|
|
#include "medefines.h"
|
|
#include "meinternal.h"
|
|
#include "meerror.h"
|
|
#include "meids.h"
|
|
#include "medebug.h"
|
|
|
|
#include "meplx_reg.h"
|
|
#include "me0600_ext_irq_reg.h"
|
|
#include "me0600_ext_irq.h"
|
|
|
|
/*
|
|
* Functions
|
|
*/
|
|
|
|
static int me0600_ext_irq_io_irq_start(struct me_subdevice *subdevice,
|
|
struct file *filep,
|
|
int channel,
|
|
int irq_source,
|
|
int irq_edge, int irq_arg, int flags)
|
|
{
|
|
me0600_ext_irq_subdevice_t *instance;
|
|
uint32_t tmp;
|
|
unsigned long cpu_flags;
|
|
|
|
PDEBUG("executed.\n");
|
|
|
|
instance = (me0600_ext_irq_subdevice_t *) subdevice;
|
|
|
|
if (flags & ~ME_IO_IRQ_START_DIO_BIT) {
|
|
PERROR("Invalid flag specified.\n");
|
|
return ME_ERRNO_INVALID_FLAGS;
|
|
}
|
|
|
|
if (instance->lintno > 1) {
|
|
PERROR("Wrong idx=%d.\n", instance->lintno);
|
|
return ME_ERRNO_INVALID_SUBDEVICE;
|
|
}
|
|
|
|
if (channel) {
|
|
PERROR("Invalid channel specified.\n");
|
|
return ME_ERRNO_INVALID_CHANNEL;
|
|
}
|
|
|
|
if (irq_source != ME_IRQ_SOURCE_DIO_LINE) {
|
|
PERROR("Invalid irq source specified.\n");
|
|
return ME_ERRNO_INVALID_IRQ_SOURCE;
|
|
}
|
|
|
|
if (irq_edge != ME_IRQ_EDGE_RISING) {
|
|
PERROR("Invalid irq edge specified.\n");
|
|
return ME_ERRNO_INVALID_IRQ_EDGE;
|
|
}
|
|
|
|
ME_SUBDEVICE_ENTER;
|
|
|
|
spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
|
|
spin_lock(instance->intcsr_lock);
|
|
tmp = inl(instance->intcsr);
|
|
switch (instance->lintno) {
|
|
case 0:
|
|
tmp |=
|
|
PLX_INTCSR_LOCAL_INT1_EN | PLX_INTCSR_LOCAL_INT1_POL |
|
|
PLX_INTCSR_PCI_INT_EN;
|
|
break;
|
|
case 1:
|
|
tmp |=
|
|
PLX_INTCSR_LOCAL_INT2_EN | PLX_INTCSR_LOCAL_INT2_POL |
|
|
PLX_INTCSR_PCI_INT_EN;
|
|
break;
|
|
}
|
|
outl(tmp, instance->intcsr);
|
|
PDEBUG_REG("intcsr outl(plx:0x%X)=0x%x\n", instance->intcsr, tmp);
|
|
spin_unlock(instance->intcsr_lock);
|
|
instance->rised = 0;
|
|
spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
|
|
|
|
ME_SUBDEVICE_EXIT;
|
|
|
|
return ME_ERRNO_SUCCESS;
|
|
}
|
|
|
|
static int me0600_ext_irq_io_irq_wait(struct me_subdevice *subdevice,
|
|
struct file *filep,
|
|
int channel,
|
|
int *irq_count,
|
|
int *value, int time_out, int flags)
|
|
{
|
|
me0600_ext_irq_subdevice_t *instance;
|
|
int err = ME_ERRNO_SUCCESS;
|
|
long t = 0;
|
|
unsigned long cpu_flags;
|
|
|
|
PDEBUG("executed.\n");
|
|
|
|
instance = (me0600_ext_irq_subdevice_t *) subdevice;
|
|
|
|
if (flags) {
|
|
PERROR("Invalid flag specified.\n");
|
|
return ME_ERRNO_INVALID_FLAGS;
|
|
}
|
|
|
|
if (channel) {
|
|
PERROR("Invalid channel specified.\n");
|
|
return ME_ERRNO_INVALID_CHANNEL;
|
|
}
|
|
|
|
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 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 interrupt aborted by signal.\n");
|
|
err = ME_ERRNO_SIGNAL;
|
|
}
|
|
|
|
spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
|
|
instance->rised = 0;
|
|
*irq_count = instance->n;
|
|
*value = 1;
|
|
spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
|
|
|
|
ME_SUBDEVICE_EXIT;
|
|
|
|
return err;
|
|
}
|
|
|
|
static int me0600_ext_irq_io_irq_stop(struct me_subdevice *subdevice,
|
|
struct file *filep,
|
|
int channel, int flags)
|
|
{
|
|
me0600_ext_irq_subdevice_t *instance;
|
|
int err = ME_ERRNO_SUCCESS;
|
|
uint32_t tmp;
|
|
unsigned long cpu_flags;
|
|
|
|
PDEBUG("executed.\n");
|
|
|
|
instance = (me0600_ext_irq_subdevice_t *) subdevice;
|
|
|
|
if (flags) {
|
|
PERROR("Invalid flag specified.\n");
|
|
return ME_ERRNO_INVALID_FLAGS;
|
|
}
|
|
|
|
if (instance->lintno > 1) {
|
|
PERROR("Wrong idx=%d.\n", instance->lintno);
|
|
return ME_ERRNO_INVALID_SUBDEVICE;
|
|
}
|
|
|
|
if (channel) {
|
|
PERROR("Invalid channel specified.\n");
|
|
return ME_ERRNO_INVALID_CHANNEL;
|
|
}
|
|
|
|
ME_SUBDEVICE_ENTER;
|
|
|
|
spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
|
|
spin_lock(instance->intcsr_lock);
|
|
tmp = inl(instance->intcsr);
|
|
switch (instance->lintno) {
|
|
case 0:
|
|
tmp &= ~PLX_INTCSR_LOCAL_INT1_EN;
|
|
break;
|
|
case 1:
|
|
tmp &= ~PLX_INTCSR_LOCAL_INT2_EN;
|
|
break;
|
|
}
|
|
outl(tmp, instance->intcsr);
|
|
PDEBUG_REG("intcsr outl(plx:0x%X)=0x%x\n", instance->intcsr, tmp);
|
|
spin_unlock(instance->intcsr_lock);
|
|
instance->rised = -1;
|
|
spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
|
|
wake_up_interruptible_all(&instance->wait_queue);
|
|
|
|
ME_SUBDEVICE_EXIT;
|
|
|
|
return err;
|
|
}
|
|
|
|
static int me0600_ext_irq_io_reset_subdevice(struct me_subdevice *subdevice,
|
|
struct file *filep, int flags)
|
|
{
|
|
me0600_ext_irq_subdevice_t *instance;
|
|
uint32_t tmp;
|
|
unsigned long cpu_flags;
|
|
|
|
PDEBUG("executed.\n");
|
|
|
|
instance = (me0600_ext_irq_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->intcsr_lock);
|
|
tmp = inl(instance->intcsr);
|
|
switch (instance->lintno) {
|
|
case 0:
|
|
tmp |= PLX_INTCSR_LOCAL_INT1_POL | PLX_INTCSR_PCI_INT_EN;
|
|
tmp &= ~PLX_INTCSR_LOCAL_INT1_EN;
|
|
break;
|
|
case 1:
|
|
tmp |= PLX_INTCSR_LOCAL_INT2_POL | PLX_INTCSR_PCI_INT_EN;
|
|
tmp &= ~PLX_INTCSR_LOCAL_INT2_EN;
|
|
break;
|
|
}
|
|
outl(tmp, instance->intcsr);
|
|
PDEBUG_REG("intcsr outl(plx:0x%X)=0x%x\n", instance->intcsr, tmp);
|
|
spin_unlock(instance->intcsr_lock);
|
|
|
|
instance->rised = -1;
|
|
instance->n = 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 me0600_ext_irq_query_number_channels(struct me_subdevice *subdevice,
|
|
int *number)
|
|
{
|
|
PDEBUG("executed.\n");
|
|
*number = 1;
|
|
return ME_ERRNO_SUCCESS;
|
|
}
|
|
|
|
static int me0600_ext_irq_query_subdevice_type(struct me_subdevice *subdevice,
|
|
int *type, int *subtype)
|
|
{
|
|
PDEBUG("executed.\n");
|
|
*type = ME_TYPE_EXT_IRQ;
|
|
*subtype = ME_SUBTYPE_SINGLE;
|
|
return ME_ERRNO_SUCCESS;
|
|
}
|
|
|
|
static int me0600_ext_irq_query_subdevice_caps(struct me_subdevice *subdevice,
|
|
int *caps)
|
|
{
|
|
PDEBUG("executed.\n");
|
|
*caps = ME_CAPS_EXT_IRQ_EDGE_RISING;
|
|
return ME_ERRNO_SUCCESS;
|
|
}
|
|
|
|
static void me0600_ext_irq_destructor(struct me_subdevice *subdevice)
|
|
{
|
|
me0600_ext_irq_subdevice_t *instance;
|
|
|
|
PDEBUG("executed.\n");
|
|
|
|
instance = (me0600_ext_irq_subdevice_t *) subdevice;
|
|
|
|
free_irq(instance->irq, (void *)instance);
|
|
me_subdevice_deinit(&instance->base);
|
|
kfree(instance);
|
|
}
|
|
|
|
static irqreturn_t me0600_isr(int irq, void *dev_id)
|
|
{
|
|
me0600_ext_irq_subdevice_t *instance;
|
|
uint32_t status;
|
|
uint32_t mask = PLX_INTCSR_PCI_INT_EN;
|
|
irqreturn_t ret = IRQ_HANDLED;
|
|
|
|
instance = (me0600_ext_irq_subdevice_t *) dev_id;
|
|
|
|
if (irq != instance->irq) {
|
|
PERROR("Incorrect interrupt num: %d.\n", irq);
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
PDEBUG("executed.\n");
|
|
|
|
if (instance->lintno > 1) {
|
|
PERROR_CRITICAL
|
|
("%s():Wrong subdevice index=%d plx:irq_status_reg=0x%04X.\n",
|
|
__func__, instance->lintno, inl(instance->intcsr));
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
spin_lock(&instance->subdevice_lock);
|
|
spin_lock(instance->intcsr_lock);
|
|
status = inl(instance->intcsr);
|
|
switch (instance->lintno) {
|
|
case 0:
|
|
mask |= PLX_INTCSR_LOCAL_INT1_STATE | PLX_INTCSR_LOCAL_INT1_EN;
|
|
break;
|
|
case 1:
|
|
mask |= PLX_INTCSR_LOCAL_INT2_STATE | PLX_INTCSR_LOCAL_INT2_EN;
|
|
break;
|
|
}
|
|
|
|
if ((status & mask) == mask) {
|
|
instance->rised = 1;
|
|
instance->n++;
|
|
inb(instance->reset_reg);
|
|
PDEBUG("Interrupt detected.\n");
|
|
} else {
|
|
PINFO
|
|
("%ld Shared interrupt. %s(): idx=0 plx:irq_status_reg=0x%04X\n",
|
|
jiffies, __func__, status);
|
|
ret = IRQ_NONE;
|
|
}
|
|
spin_unlock(instance->intcsr_lock);
|
|
spin_unlock(&instance->subdevice_lock);
|
|
|
|
wake_up_interruptible_all(&instance->wait_queue);
|
|
|
|
return ret;
|
|
}
|
|
|
|
me0600_ext_irq_subdevice_t *me0600_ext_irq_constructor(uint32_t plx_reg_base,
|
|
uint32_t me0600_reg_base,
|
|
spinlock_t *intcsr_lock,
|
|
unsigned ext_irq_idx,
|
|
int irq)
|
|
{
|
|
me0600_ext_irq_subdevice_t *subdevice;
|
|
int err;
|
|
|
|
PDEBUG("executed.\n");
|
|
|
|
/* Allocate memory for subdevice instance */
|
|
subdevice = kmalloc(sizeof(me0600_ext_irq_subdevice_t), GFP_KERNEL);
|
|
|
|
if (!subdevice) {
|
|
PERROR("Cannot get memory for 630_ext_irq instance.\n");
|
|
return NULL;
|
|
}
|
|
|
|
memset(subdevice, 0, sizeof(me0600_ext_irq_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->intcsr_lock = intcsr_lock;
|
|
|
|
/* Initialize wait queue */
|
|
init_waitqueue_head(&subdevice->wait_queue);
|
|
|
|
subdevice->lintno = ext_irq_idx;
|
|
|
|
/* Request interrupt line */
|
|
subdevice->irq = irq;
|
|
|
|
err = request_irq(subdevice->irq, me0600_isr,
|
|
#ifdef IRQF_DISABLED
|
|
IRQF_DISABLED | IRQF_SHARED,
|
|
#else
|
|
SA_INTERRUPT | SA_SHIRQ,
|
|
#endif
|
|
ME0600_NAME, (void *)subdevice);
|
|
|
|
if (err) {
|
|
PERROR("Cannot get interrupt line.\n");
|
|
kfree(subdevice);
|
|
return NULL;
|
|
}
|
|
PINFO("Registered irq=%d.\n", subdevice->irq);
|
|
|
|
/* Initialize registers */
|
|
subdevice->intcsr = plx_reg_base + PLX_INTCSR;
|
|
subdevice->reset_reg =
|
|
me0600_reg_base + ME0600_INT_0_RESET_REG + ext_irq_idx;
|
|
|
|
/* Initialize the subdevice methods */
|
|
subdevice->base.me_subdevice_io_irq_start = me0600_ext_irq_io_irq_start;
|
|
subdevice->base.me_subdevice_io_irq_wait = me0600_ext_irq_io_irq_wait;
|
|
subdevice->base.me_subdevice_io_irq_stop = me0600_ext_irq_io_irq_stop;
|
|
subdevice->base.me_subdevice_io_reset_subdevice =
|
|
me0600_ext_irq_io_reset_subdevice;
|
|
subdevice->base.me_subdevice_query_number_channels =
|
|
me0600_ext_irq_query_number_channels;
|
|
subdevice->base.me_subdevice_query_subdevice_type =
|
|
me0600_ext_irq_query_subdevice_type;
|
|
subdevice->base.me_subdevice_query_subdevice_caps =
|
|
me0600_ext_irq_query_subdevice_caps;
|
|
subdevice->base.me_subdevice_destructor = me0600_ext_irq_destructor;
|
|
|
|
subdevice->rised = 0;
|
|
subdevice->n = 0;
|
|
|
|
return subdevice;
|
|
}
|