diff options
Diffstat (limited to 'drivers/staging/meilhaus/me4600_ext_irq.c')
-rw-r--r-- | drivers/staging/meilhaus/me4600_ext_irq.c | 457 |
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 cfb4adb..0000000 --- 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; -} |