--- /dev/null
+/**
+ * @file me1400_ext_irq.c
+ *
+ * @brief ME-1400 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 <asm/io.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+
+#include "medefines.h"
+#include "meinternal.h"
+#include "meerror.h"
+#include "medebug.h"
+#include "meids.h"
+
+#include "me1400_ext_irq.h"
+#include "me1400_ext_irq_reg.h"
+
+/*
+ * Defines
+ */
+#define ME1400_EXT_IRQ_MAGIC_NUMBER 0x1401 /**< The magic number of the class structure. */
+#define ME1400_EXT_IRQ_NUMBER_CHANNELS 1 /**< One channel per counter. */
+
+/*
+ * Functions
+ */
+
+static int me1400_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)
+{
+ me1400_ext_irq_subdevice_t *instance;
+ unsigned long cpu_flags;
+ uint8_t tmp;
+
+ PDEBUG("executed.\n");
+
+ instance = (me1400_ext_irq_subdevice_t *) subdevice;
+
+ if (flags & ~ME_IO_IRQ_START_DIO_BIT) {
+ PERROR("Invalid flag specified.\n");
+ return ME_ERRNO_INVALID_FLAGS;
+ }
+
+ if (channel) {
+ PERROR("Invalid channel.\n");
+ return ME_ERRNO_INVALID_CHANNEL;
+ }
+
+ if (irq_source != ME_IRQ_SOURCE_DIO_LINE) {
+ PERROR("Invalid irq source.\n");
+ return ME_ERRNO_INVALID_IRQ_SOURCE;
+ }
+
+ if (irq_edge != ME_IRQ_EDGE_RISING) {
+ PERROR("Invalid irq edge.\n");
+ return ME_ERRNO_INVALID_IRQ_EDGE;
+ }
+
+ ME_SUBDEVICE_ENTER;
+
+ spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
+
+ spin_lock(instance->clk_src_reg_lock);
+// // Enable IRQ on PLX
+// tmp = inb(instance->plx_intcs_reg) | (PLX_LOCAL_INT1_EN | PLX_LOCAL_INT1_POL | PLX_PCI_INT_EN);
+// outb(tmp, instance->plx_intcs_reg);
+// PDEBUG_REG("ctrl_reg outb(PLX:0x%lX)=0x%x\n", instance->plx_intcs_reg, tmp);
+
+ // Enable IRQ
+ switch (instance->device_id) {
+ case PCI_DEVICE_ID_MEILHAUS_ME140C:
+ case PCI_DEVICE_ID_MEILHAUS_ME140D:
+ tmp = inb(instance->ctrl_reg);
+ tmp |= ME1400CD_EXT_IRQ_CLK_EN;
+ outb(tmp, instance->ctrl_reg);
+ PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
+ instance->reg_base,
+ instance->ctrl_reg - instance->reg_base, tmp);
+ break;
+
+ default:
+ outb(ME1400AB_EXT_IRQ_IRQ_EN, instance->ctrl_reg);
+ PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
+ instance->reg_base,
+ instance->ctrl_reg - instance->reg_base,
+ ME1400AB_EXT_IRQ_IRQ_EN);
+ break;
+ }
+ spin_unlock(instance->clk_src_reg_lock);
+ instance->rised = 0;
+ spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
+
+ ME_SUBDEVICE_EXIT;
+
+ return ME_ERRNO_SUCCESS;
+}
+
+static int me1400_ext_irq_io_irq_wait(struct me_subdevice *subdevice,
+ struct file *filep,
+ int channel,
+ int *irq_count,
+ int *value, int time_out, int flags)
+{
+ me1400_ext_irq_subdevice_t *instance;
+ unsigned long cpu_flags;
+ long t = 0;
+ int err = ME_ERRNO_SUCCESS;
+
+ PDEBUG("executed.\n");
+
+ instance = (me1400_ext_irq_subdevice_t *) subdevice;
+
+ if (flags) {
+ PERROR("Invalid flag specified.\n");
+ return ME_ERRNO_INVALID_FLAGS;
+ }
+
+ if (channel) {
+ PERROR("Invalid channel.\n");
+ return ME_ERRNO_INVALID_CHANNEL;
+ }
+
+ if (time_out < 0) {
+ PERROR("Invalid time out.\n");
+ return ME_ERRNO_INVALID_TIMEOUT;
+ }
+
+ if (time_out) {
+ /* Convert to ticks */
+ 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 me1400_ext_irq_io_irq_stop(struct me_subdevice *subdevice,
+ struct file *filep,
+ int channel, int flags)
+{
+ me1400_ext_irq_subdevice_t *instance;
+ unsigned long cpu_flags;
+ uint8_t tmp;
+ int err = ME_ERRNO_SUCCESS;
+
+ PDEBUG("executed.\n");
+
+ instance = (me1400_ext_irq_subdevice_t *) subdevice;
+
+ if (flags) {
+ PERROR("Invalid flag specified.\n");
+ return ME_ERRNO_INVALID_FLAGS;
+ }
+
+ if (channel) {
+ PERROR("Invalid channel.\n");
+ return ME_ERRNO_INVALID_CHANNEL;
+ }
+
+ ME_SUBDEVICE_ENTER;
+
+ spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
+ spin_lock(instance->clk_src_reg_lock);
+// // Disable IRQ on PLX
+// tmp = inb(instance->plx_intcs_reg) & ( ~(PLX_LOCAL_INT1_EN | PLX_LOCAL_INT1_POL | PLX_PCI_INT_EN));
+// outb(tmp, instance->plx_intcs_reg);
+// PDEBUG_REG("ctrl_reg outb(PLX:0x%lX)=0x%x\n", instance->plx_intcs_reg, tmp);
+
+ switch (instance->device_id) {
+ case PCI_DEVICE_ID_MEILHAUS_ME140C:
+ case PCI_DEVICE_ID_MEILHAUS_ME140D:
+ tmp = inb(instance->ctrl_reg);
+ tmp &= ~ME1400CD_EXT_IRQ_CLK_EN;
+ outb(tmp, instance->ctrl_reg);
+ PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
+ instance->reg_base,
+ instance->ctrl_reg - instance->reg_base, tmp);
+
+ break;
+
+ default:
+ outb(0x00, instance->ctrl_reg);
+ PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
+ instance->reg_base,
+ instance->ctrl_reg - instance->reg_base, 0x00);
+ break;
+ }
+ spin_unlock(instance->clk_src_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 me1400_ext_irq_io_reset_subdevice(struct me_subdevice *subdevice,
+ struct file *filep, int flags)
+{
+ me1400_ext_irq_subdevice_t *instance =
+ (me1400_ext_irq_subdevice_t *) subdevice;
+
+ PDEBUG("executed.\n");
+
+ if (flags) {
+ PERROR("Invalid flag specified.\n");
+ return ME_ERRNO_INVALID_FLAGS;
+ }
+
+ instance->n = 0;
+ return me1400_ext_irq_io_irq_stop(subdevice, filep, 0, flags);
+}
+
+static int me1400_ext_irq_query_number_channels(struct me_subdevice *subdevice,
+ int *number)
+{
+ PDEBUG("executed.\n");
+ *number = ME1400_EXT_IRQ_NUMBER_CHANNELS;
+ return ME_ERRNO_SUCCESS;
+}
+
+static int me1400_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 me1400_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 int me1400_ext_irq_query_subdevice_caps_args(struct me_subdevice
+ *subdevice, int cap,
+ int *args, int count)
+{
+ PDEBUG("executed.\n");
+ return ME_ERRNO_NOT_SUPPORTED;
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19)
+static irqreturn_t me1400_ext_irq_isr(int irq, void *dev_id)
+#else
+static irqreturn_t me1400_ext_irq_isr(int irq, void *dev_id,
+ struct pt_regs *regs)
+#endif
+{
+ me1400_ext_irq_subdevice_t *instance;
+ uint32_t status;
+ uint8_t tmp;
+
+ instance = (me1400_ext_irq_subdevice_t *) dev_id;
+
+ if (irq != instance->irq) {
+ PERROR("Incorrect interrupt num: %d.\n", irq);
+ return IRQ_NONE;
+ }
+
+ spin_lock(&instance->subdevice_lock);
+ status = inl(instance->plx_intcs_reg);
+// if (!((status & PLX_LOCAL_INT1_STATE) && (status & PLX_LOCAL_INT1_EN) && (status & PLX_PCI_INT_EN)))
+ if ((status &
+ (PLX_LOCAL_INT1_STATE | PLX_LOCAL_INT1_EN | PLX_PCI_INT_EN)) !=
+ (PLX_LOCAL_INT1_STATE | PLX_LOCAL_INT1_EN | PLX_PCI_INT_EN)) {
+ spin_unlock(&instance->subdevice_lock);
+ PINFO("%ld Shared interrupt. %s(): irq_status_reg=0x%04X\n",
+ jiffies, __FUNCTION__, status);
+ return IRQ_NONE;
+ }
+
+ inl(instance->ctrl_reg);
+
+ PDEBUG("executed.\n");
+
+ instance->n++;
+ instance->rised = 1;
+
+ switch (instance->device_id) {
+
+ case PCI_DEVICE_ID_MEILHAUS_ME140C:
+ case PCI_DEVICE_ID_MEILHAUS_ME140D:
+ spin_lock(instance->clk_src_reg_lock);
+ tmp = inb(instance->ctrl_reg);
+ tmp &= ~ME1400CD_EXT_IRQ_CLK_EN;
+ outb(tmp, instance->ctrl_reg);
+ PDEBUG_REG("ctrl_reg outb(0x%lX+0x%lX)=0x%x\n",
+ instance->reg_base,
+ instance->ctrl_reg - instance->reg_base, tmp);
+ tmp |= ME1400CD_EXT_IRQ_CLK_EN;
+ outb(tmp, instance->ctrl_reg);
+ PDEBUG_REG("ctrl_reg outb(0x%lX+0x%lX)=0x%x\n",
+ instance->reg_base,
+ instance->ctrl_reg - instance->reg_base, tmp);
+ spin_unlock(instance->clk_src_reg_lock);
+
+ break;
+
+ default:
+ outb(0, instance->ctrl_reg);
+ PDEBUG_REG("ctrl_reg outb(0x%lX+0x%lX)=0x%x\n",
+ instance->reg_base,
+ instance->ctrl_reg - instance->reg_base, 0);
+ outb(ME1400AB_EXT_IRQ_IRQ_EN, instance->ctrl_reg);
+ PDEBUG_REG("ctrl_reg outb(0x%lX+0x%lX)=0x%x\n",
+ instance->reg_base,
+ instance->ctrl_reg - instance->reg_base,
+ ME1400AB_EXT_IRQ_IRQ_EN);
+ break;
+ }
+
+ spin_unlock(&instance->subdevice_lock);
+ wake_up_interruptible_all(&instance->wait_queue);
+
+ return IRQ_HANDLED;
+}
+
+static void me1400_ext_irq_destructor(struct me_subdevice *subdevice)
+{
+ me1400_ext_irq_subdevice_t *instance;
+ uint8_t tmp;
+
+ PDEBUG("executed.\n");
+
+ instance = (me1400_ext_irq_subdevice_t *) subdevice;
+
+ // Disable IRQ on PLX
+ tmp =
+ inb(instance->
+ plx_intcs_reg) & (~(PLX_LOCAL_INT1_EN | PLX_LOCAL_INT1_POL |
+ PLX_PCI_INT_EN));
+ outb(tmp, instance->plx_intcs_reg);
+ PDEBUG_REG("ctrl_reg outb(plx:0x%lX)=0x%x\n", instance->plx_intcs_reg,
+ tmp);
+
+ free_irq(instance->irq, (void *)instance);
+ me_subdevice_deinit(&instance->base);
+ kfree(instance);
+}
+
+me1400_ext_irq_subdevice_t *me1400_ext_irq_constructor(uint32_t device_id,
+ uint32_t plx_reg_base,
+ uint32_t me1400_reg_base,
+ spinlock_t *
+ clk_src_reg_lock,
+ int irq)
+{
+ me1400_ext_irq_subdevice_t *subdevice;
+ int err;
+ uint8_t tmp;
+
+ PDEBUG("executed.\n");
+
+ /* Allocate memory for subdevice instance */
+ subdevice = kmalloc(sizeof(me1400_ext_irq_subdevice_t), GFP_KERNEL);
+
+ if (!subdevice) {
+ PERROR("Cannot get memory for 1400_ext_irq instance.\n");
+ return NULL;
+ }
+
+ memset(subdevice, 0, sizeof(me1400_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->clk_src_reg_lock = clk_src_reg_lock;
+
+ /* Initialize wait queue */
+ init_waitqueue_head(&subdevice->wait_queue);
+
+ subdevice->irq = irq;
+
+ err = request_irq(irq, me1400_ext_irq_isr,
+#ifdef IRQF_DISABLED
+ IRQF_DISABLED | IRQF_SHARED,
+#else
+ SA_INTERRUPT | SA_SHIRQ,
+#endif
+ ME1400_NAME, (void *)subdevice);
+
+ if (err) {
+ PERROR("Can't get irq.\n");
+ me_subdevice_deinit(&subdevice->base);
+ kfree(subdevice);
+ return NULL;
+ }
+ PINFO("Registered irq=%d.\n", subdevice->irq);
+
+ /* Initialize registers */
+ subdevice->plx_intcs_reg = plx_reg_base + PLX_INTCSR_REG;
+ subdevice->ctrl_reg = me1400_reg_base + ME1400AB_EXT_IRQ_CTRL_REG;
+#ifdef MEDEBUG_DEBUG_REG
+ subdevice->reg_base = me1400_reg_base;
+#endif
+
+ // Enable IRQ on PLX
+ tmp =
+ inb(subdevice->
+ plx_intcs_reg) | (PLX_LOCAL_INT1_EN | PLX_LOCAL_INT1_POL |
+ PLX_PCI_INT_EN);
+ outb(tmp, subdevice->plx_intcs_reg);
+ PDEBUG_REG("ctrl_reg outb(Pplx:0x%lX)=0x%x\n", subdevice->plx_intcs_reg,
+ tmp);
+
+ /* Initialize the subdevice methods */
+ subdevice->base.me_subdevice_io_irq_start = me1400_ext_irq_io_irq_start;
+ subdevice->base.me_subdevice_io_irq_wait = me1400_ext_irq_io_irq_wait;
+ subdevice->base.me_subdevice_io_irq_stop = me1400_ext_irq_io_irq_stop;
+ subdevice->base.me_subdevice_io_reset_subdevice =
+ me1400_ext_irq_io_reset_subdevice;
+ subdevice->base.me_subdevice_query_number_channels =
+ me1400_ext_irq_query_number_channels;
+ subdevice->base.me_subdevice_query_subdevice_type =
+ me1400_ext_irq_query_subdevice_type;
+ subdevice->base.me_subdevice_query_subdevice_caps =
+ me1400_ext_irq_query_subdevice_caps;
+ subdevice->base.me_subdevice_query_subdevice_caps_args =
+ me1400_ext_irq_query_subdevice_caps_args;
+ subdevice->base.me_subdevice_destructor = me1400_ext_irq_destructor;
+
+ subdevice->rised = 0;
+ subdevice->n = 0;
+
+ return subdevice;
+}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff