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path: root/drivers/staging/meilhaus/me0600_ext_irq.c
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Diffstat (limited to 'drivers/staging/meilhaus/me0600_ext_irq.c')
-rw-r--r--drivers/staging/meilhaus/me0600_ext_irq.c469
1 files changed, 0 insertions, 469 deletions
diff --git a/drivers/staging/meilhaus/me0600_ext_irq.c b/drivers/staging/meilhaus/me0600_ext_irq.c
deleted file mode 100644
index 1d098420a54..00000000000
--- a/drivers/staging/meilhaus/me0600_ext_irq.c
+++ /dev/null
@@ -1,469 +0,0 @@
-/**
- * @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/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,
- IRQF_DISABLED | IRQF_SHARED,
- 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;
-}
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