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Diffstat (limited to 'drivers/staging/meilhaus/me4600_ext_irq.c')
-rw-r--r--drivers/staging/meilhaus/me4600_ext_irq.c457
1 files changed, 0 insertions, 457 deletions
diff --git a/drivers/staging/meilhaus/me4600_ext_irq.c b/drivers/staging/meilhaus/me4600_ext_irq.c
deleted file mode 100644
index cfb4adbd41ab..000000000000
--- a/drivers/staging/meilhaus/me4600_ext_irq.c
+++ /dev/null
@@ -1,457 +0,0 @@
-/**
- * @file me4600_ext_irq.c
- *
- * @brief ME-4000 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/interrupt.h>
-#include <linux/io.h>
-#include <linux/types.h>
-
-#include "medefines.h"
-#include "meinternal.h"
-#include "meerror.h"
-
-#include "medebug.h"
-#include "meids.h"
-#include "me4600_reg.h"
-#include "me4600_ai_reg.h"
-#include "me4600_ext_irq_reg.h"
-#include "me4600_ext_irq.h"
-
-/*
- * Defines
- */
-
-/*
- * Functions
- */
-
-static int me4600_ext_irq_io_irq_start(me_subdevice_t *subdevice,
- struct file *filep,
- int channel,
- int irq_source,
- int irq_edge, int irq_arg, int flags)
-{
- me4600_ext_irq_subdevice_t *instance;
- int err = ME_ERRNO_SUCCESS;
- unsigned long cpu_flags;
- uint32_t tmp;
-
- PDEBUG("executed.\n");
-
- instance = (me4600_ext_irq_subdevice_t *) subdevice;
-
- if (flags & ~ME_IO_IRQ_START_DIO_BIT) {
- PERROR("Invalid flag specified.\n");
- return ME_ERRNO_INVALID_FLAGS;
- }
-
- if ((irq_edge != ME_IRQ_EDGE_RISING)
- && (irq_edge != ME_IRQ_EDGE_FALLING)
- && (irq_edge != ME_IRQ_EDGE_ANY)
- ) {
- PERROR("Invalid irq edge specified.\n");
- return ME_ERRNO_INVALID_IRQ_EDGE;
- }
-
- if (irq_source != ME_IRQ_SOURCE_DIO_LINE) {
- PERROR("Invalid irq source specified.\n");
- return ME_ERRNO_INVALID_IRQ_SOURCE;
- }
-
- if (channel) {
- PERROR("Invalid channel specified.\n");
- return ME_ERRNO_INVALID_CHANNEL;
- }
-
- ME_SUBDEVICE_ENTER;
-
- spin_lock(&instance->subdevice_lock);
- tmp = 0x0; //inl(instance->ext_irq_config_reg);
-
- if (irq_edge == ME_IRQ_EDGE_RISING) {
- //tmp &= ~ME4600_EXT_IRQ_CONFIG_MASK;
- //tmp |= ME4600_EXT_IRQ_CONFIG_MASK_RISING;
- } else if (irq_edge == ME_IRQ_EDGE_FALLING) {
- //tmp &= ~ME4600_EXT_IRQ_CONFIG_MASK;
- //tmp |= ME4600_EXT_IRQ_CONFIG_MASK_FALLING;
- tmp = ME4600_EXT_IRQ_CONFIG_MASK_FALLING;
- } else if (irq_edge == ME_IRQ_EDGE_ANY) {
- //tmp &= ~ME4600_EXT_IRQ_CONFIG_MASK;
- //tmp |= ME4600_EXT_IRQ_CONFIG_MASK_ANY;
- tmp = ME4600_EXT_IRQ_CONFIG_MASK_ANY;
- }
-
- outl(tmp, instance->ext_irq_config_reg);
- PDEBUG_REG("ext_irq_config_reg outl(0x%lX+0x%lX)=0x%x\n",
- instance->reg_base,
- instance->ext_irq_config_reg - instance->reg_base, tmp);
-
- spin_lock_irqsave(instance->ctrl_reg_lock, cpu_flags);
- tmp = inl(instance->ctrl_reg);
- tmp &= ~(ME4600_AI_CTRL_BIT_EX_IRQ | ME4600_AI_CTRL_BIT_EX_IRQ_RESET);
- tmp |= ME4600_AI_CTRL_BIT_EX_IRQ;
- outl(tmp, instance->ctrl_reg);
- spin_unlock_irqrestore(instance->ctrl_reg_lock, cpu_flags);
- instance->rised = 0;
- spin_unlock(&instance->subdevice_lock);
-
- ME_SUBDEVICE_EXIT;
-
- return err;
-}
-
-static int me4600_ext_irq_io_irq_wait(me_subdevice_t *subdevice,
- struct file *filep,
- int channel,
- int *irq_count,
- int *value, int time_out, int flags)
-{
- me4600_ext_irq_subdevice_t *instance;
- int err = ME_ERRNO_SUCCESS;
- long t = 0;
- unsigned long cpu_flags;
-
- PDEBUG("executed.\n");
-
- instance = (me4600_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 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 = instance->value;
- spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
-
- ME_SUBDEVICE_EXIT;
-
- return err;
-}
-
-static int me4600_ext_irq_io_irq_stop(me_subdevice_t *subdevice,
- struct file *filep,
- int channel, int flags)
-{
- me4600_ext_irq_subdevice_t *instance;
- int err = ME_ERRNO_SUCCESS;
- unsigned long cpu_flags;
- uint32_t tmp;
-
- PDEBUG("executed.\n");
-
- instance = (me4600_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;
- }
-
- ME_SUBDEVICE_ENTER;
-
- spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
- spin_lock(instance->ctrl_reg_lock);
- tmp = inl(instance->ctrl_reg);
- tmp &= ~(ME4600_AI_CTRL_BIT_EX_IRQ | ME4600_AI_CTRL_BIT_EX_IRQ_RESET);
- outl(tmp, instance->ctrl_reg);
- PDEBUG_REG("ctrl_regv outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
- instance->ctrl_reg - instance->reg_base, tmp);
- spin_unlock(instance->ctrl_reg_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 me4600_ext_irq_io_reset_subdevice(me_subdevice_t *subdevice,
- struct file *filep, int flags)
-{
- me4600_ext_irq_subdevice_t *instance;
- unsigned long cpu_flags;
- uint32_t tmp;
-
- PDEBUG("executed.\n");
-
- instance = (me4600_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->ctrl_reg_lock);
- tmp = inl(instance->ctrl_reg);
- tmp &= ~(ME4600_AI_CTRL_BIT_EX_IRQ | ME4600_AI_CTRL_BIT_EX_IRQ_RESET);
- outl(tmp, instance->ctrl_reg);
- PDEBUG_REG("ctrl_regv outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
- instance->ctrl_reg - instance->reg_base, tmp);
- spin_unlock(instance->ctrl_reg_lock);
- instance->rised = -1;
- instance->count = 0;
- outl(ME4600_EXT_IRQ_CONFIG_MASK_ANY, instance->ext_irq_config_reg);
- PDEBUG_REG("ext_irq_config_reg outl(0x%lX+0x%lX)=0x%x\n",
- instance->reg_base,
- instance->ext_irq_config_reg - instance->reg_base,
- ME4600_EXT_IRQ_CONFIG_MASK_ANY);
- spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
- wake_up_interruptible_all(&instance->wait_queue);
-
- ME_SUBDEVICE_EXIT;
-
- return ME_ERRNO_SUCCESS;
-}
-
-static void me4600_ext_irq_destructor(struct me_subdevice *subdevice)
-{
- me4600_ext_irq_subdevice_t *instance;
-
- PDEBUG("executed.\n");
- instance = (me4600_ext_irq_subdevice_t *) subdevice;
- me_subdevice_deinit(&instance->base);
- free_irq(instance->irq, instance);
- kfree(instance);
-}
-
-static int me4600_ext_irq_query_number_channels(me_subdevice_t *subdevice,
- int *number)
-{
- PDEBUG("executed.\n");
- *number = 1;
- return ME_ERRNO_SUCCESS;
-}
-
-static int me4600_ext_irq_query_subdevice_type(me_subdevice_t *subdevice,
- int *type, int *subtype)
-{
- PDEBUG("executed.\n");
- *type = ME_TYPE_EXT_IRQ;
- *subtype = ME_SUBTYPE_SINGLE;
- return ME_ERRNO_SUCCESS;
-}
-
-static int me4600_ext_irq_query_subdevice_caps(me_subdevice_t *subdevice,
- int *caps)
-{
- PDEBUG("executed.\n");
- *caps =
- ME_CAPS_EXT_IRQ_EDGE_RISING | ME_CAPS_EXT_IRQ_EDGE_FALLING |
- ME_CAPS_EXT_IRQ_EDGE_ANY;
- return ME_ERRNO_SUCCESS;
-}
-
-static irqreturn_t me4600_ext_irq_isr(int irq, void *dev_id)
-{
- me4600_ext_irq_subdevice_t *instance;
- uint32_t ctrl;
- uint32_t irq_status;
-
- instance = (me4600_ext_irq_subdevice_t *) dev_id;
-
- if (irq != instance->irq) {
- PERROR("Incorrect interrupt num: %d.\n", irq);
- return IRQ_NONE;
- }
-
- irq_status = inl(instance->irq_status_reg);
- if (!(irq_status & ME4600_IRQ_STATUS_BIT_EX)) {
- PINFO("%ld Shared interrupt. %s(): irq_status_reg=0x%04X\n",
- jiffies, __func__, irq_status);
- return IRQ_NONE;
- }
-
- PDEBUG("executed.\n");
-
- spin_lock(&instance->subdevice_lock);
- instance->rised = 1;
- instance->value = inl(instance->ext_irq_value_reg);
- instance->count++;
-
- spin_lock(instance->ctrl_reg_lock);
- ctrl = inl(instance->ctrl_reg);
- ctrl |= ME4600_AI_CTRL_BIT_EX_IRQ_RESET;
- outl(ctrl, instance->ctrl_reg);
- PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
- instance->ctrl_reg - instance->reg_base, ctrl);
- ctrl &= ~ME4600_AI_CTRL_BIT_EX_IRQ_RESET;
- outl(ctrl, instance->ctrl_reg);
- PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
- instance->ctrl_reg - instance->reg_base, ctrl);
- spin_unlock(instance->ctrl_reg_lock);
-
- spin_unlock(&instance->subdevice_lock);
- wake_up_interruptible_all(&instance->wait_queue);
-
- return IRQ_HANDLED;
-}
-
-me4600_ext_irq_subdevice_t *me4600_ext_irq_constructor(uint32_t reg_base,
- int irq,
- spinlock_t *
- ctrl_reg_lock)
-{
- me4600_ext_irq_subdevice_t *subdevice;
- int err;
-
- PDEBUG("executed.\n");
-
- /* Allocate memory for subdevice instance */
- subdevice = kmalloc(sizeof(me4600_ext_irq_subdevice_t), GFP_KERNEL);
-
- if (!subdevice) {
- PERROR("Cannot get memory for subdevice instance.\n");
- return NULL;
- }
-
- memset(subdevice, 0, sizeof(me4600_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->ctrl_reg_lock = ctrl_reg_lock;
-
- /* Initialize wait queue */
- init_waitqueue_head(&subdevice->wait_queue);
-
- /* Register interrupt */
- subdevice->irq = irq;
-
- if (request_irq(subdevice->irq, me4600_ext_irq_isr,
- IRQF_DISABLED | IRQF_SHARED,
- ME4600_NAME, subdevice)) {
- PERROR("Cannot register interrupt.\n");
- kfree(subdevice);
- return NULL;
- }
- PINFO("Registered irq=%d.\n", subdevice->irq);
-
- /* Initialize registers */
- subdevice->irq_status_reg = reg_base + ME4600_IRQ_STATUS_REG;
- subdevice->ctrl_reg = reg_base + ME4600_AI_CTRL_REG;
- subdevice->ext_irq_config_reg = reg_base + ME4600_EXT_IRQ_CONFIG_REG;
- subdevice->ext_irq_value_reg = reg_base + ME4600_EXT_IRQ_VALUE_REG;
-#ifdef MEDEBUG_DEBUG_REG
- subdevice->reg_base = reg_base;
-#endif
-
- /* Override base class methods. */
- subdevice->base.me_subdevice_destructor = me4600_ext_irq_destructor;
- subdevice->base.me_subdevice_io_reset_subdevice =
- me4600_ext_irq_io_reset_subdevice;
- subdevice->base.me_subdevice_io_irq_start = me4600_ext_irq_io_irq_start;
- subdevice->base.me_subdevice_io_irq_wait = me4600_ext_irq_io_irq_wait;
- subdevice->base.me_subdevice_io_irq_stop = me4600_ext_irq_io_irq_stop;
- subdevice->base.me_subdevice_query_number_channels =
- me4600_ext_irq_query_number_channels;
- subdevice->base.me_subdevice_query_subdevice_type =
- me4600_ext_irq_query_subdevice_type;
- subdevice->base.me_subdevice_query_subdevice_caps =
- me4600_ext_irq_query_subdevice_caps;
-
- subdevice->rised = 0;
- subdevice->count = 0;
-
- return subdevice;
-}
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