| /** |
| * @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, __func__, 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; |
| } |