| /** |
| * @file me8200_di.c |
| * |
| * @brief ME-8200 digital input 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 <asm/io.h> |
| #include <linux/types.h> |
| #include <linux/interrupt.h> |
| #include <linux/version.h> |
| |
| #include "medefines.h" |
| #include "meerror.h" |
| |
| #include "meids.h" |
| #include "medebug.h" |
| #include "me8200_reg.h" |
| #include "me8200_di_reg.h" |
| #include "me8200_di.h" |
| |
| /// Defines |
| static void me8200_di_destructor(struct me_subdevice *subdevice); |
| static int me8200_di_io_irq_start(me_subdevice_t * subdevice, |
| struct file *filep, |
| int channel, |
| int irq_source, |
| int irq_edge, int irq_arg, int flags); |
| static int me8200_di_io_irq_wait(me_subdevice_t * subdevice, |
| struct file *filep, |
| int channel, |
| int *irq_count, |
| int *value, int time_out, int flags); |
| static int me8200_di_io_irq_stop(me_subdevice_t * subdevice, |
| struct file *filep, int channel, int flags); |
| static int me8200_di_io_single_config(me_subdevice_t * subdevice, |
| struct file *filep, |
| int channel, |
| int single_config, |
| int ref, |
| int trig_chan, |
| int trig_type, int trig_edge, int flags); |
| static int me8200_di_io_single_read(me_subdevice_t * subdevice, |
| struct file *filep, |
| int channel, |
| int *value, int time_out, int flags); |
| static int me8200_di_io_reset_subdevice(struct me_subdevice *subdevice, |
| struct file *filep, int flags); |
| static int me8200_di_query_number_channels(me_subdevice_t * subdevice, |
| int *number); |
| static int me8200_di_query_subdevice_type(me_subdevice_t * subdevice, |
| int *type, int *subtype); |
| static int me8200_di_query_subdevice_caps(me_subdevice_t * subdevice, |
| int *caps); |
| #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19) |
| static irqreturn_t me8200_isr(int irq, void *dev_id); |
| #else |
| static irqreturn_t me8200_isr(int irq, void *dev_id, struct pt_regs *regs); |
| #endif |
| #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19) |
| static irqreturn_t me8200_isr_EX(int irq, void *dev_id); |
| #else |
| static irqreturn_t me8200_isr_EX(int irq, void *dev_id, struct pt_regs *regs); |
| #endif |
| static void me8200_di_check_version(me8200_di_subdevice_t * instance, |
| unsigned long addr); |
| |
| ///Functions |
| static int me8200_di_io_irq_start(me_subdevice_t * subdevice, |
| struct file *filep, |
| int channel, |
| int irq_source, |
| int irq_edge, int irq_arg, int flags) |
| { |
| me8200_di_subdevice_t *instance; |
| int err = ME_ERRNO_SUCCESS; |
| volatile uint8_t tmp; |
| unsigned long status; |
| |
| PDEBUG("executed.\n"); |
| |
| instance = (me8200_di_subdevice_t *) subdevice; |
| |
| if (irq_source == ME_IRQ_SOURCE_DIO_PATTERN) { |
| if (flags & |
| ~(ME_IO_IRQ_START_PATTERN_FILTERING | |
| ME_IO_IRQ_START_DIO_BYTE)) { |
| PERROR("Invalid flag specified.\n"); |
| return ME_ERRNO_INVALID_FLAGS; |
| } |
| |
| if (irq_edge != ME_IRQ_EDGE_NOT_USED) { |
| PERROR("Invalid irq edge specified.\n"); |
| return ME_ERRNO_INVALID_IRQ_EDGE; |
| } |
| } else if (irq_source == ME_IRQ_SOURCE_DIO_MASK) { |
| if (flags & |
| ~(ME_IO_IRQ_START_EXTENDED_STATUS | |
| ME_IO_IRQ_START_DIO_BYTE)) { |
| 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_arg & 0xFF)) { |
| PERROR("No mask specified.\n"); |
| return ME_ERRNO_INVALID_IRQ_ARG; |
| } |
| } else { |
| 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_irqsave(&instance->subdevice_lock, status); |
| if (irq_source == ME_IRQ_SOURCE_DIO_PATTERN) { |
| outb(irq_arg, instance->compare_reg); |
| PDEBUG_REG("compare_reg outb(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->compare_reg - instance->reg_base, irq_arg); |
| outb(0xFF, instance->mask_reg); |
| PDEBUG_REG("mask_reg outb(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->mask_reg - instance->reg_base, 0xff); |
| instance->compare_value = irq_arg; |
| instance->filtering_flag = |
| (flags & ME_IO_IRQ_START_PATTERN_FILTERING) ? 1 : 0; |
| } |
| if (irq_source == ME_IRQ_SOURCE_DIO_MASK) { |
| outb(irq_arg, instance->mask_reg); |
| PDEBUG_REG("mask_reg outb(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->mask_reg - instance->reg_base, irq_arg); |
| instance->filtering_flag = 0; |
| } |
| |
| spin_lock(instance->irq_mode_lock); |
| tmp = inb(instance->irq_mode_reg); |
| tmp &= |
| ~(ME8200_IRQ_MODE_MASK << |
| (ME8200_IRQ_MODE_DI_SHIFT * instance->di_idx)); |
| if (irq_source == ME_IRQ_SOURCE_DIO_PATTERN) { |
| tmp |= |
| ME8200_IRQ_MODE_MASK_COMPARE << (ME8200_IRQ_MODE_DI_SHIFT * |
| instance->di_idx); |
| } |
| |
| if (irq_source == ME_IRQ_SOURCE_DIO_MASK) { |
| tmp |= |
| ME8200_IRQ_MODE_MASK_MASK << (ME8200_IRQ_MODE_DI_SHIFT * |
| instance->di_idx); |
| } |
| outb(tmp, instance->irq_mode_reg); |
| PDEBUG_REG("irq_mode_reg outb(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| instance->irq_mode_reg - instance->reg_base, tmp); |
| spin_unlock(instance->irq_mode_lock); |
| |
| spin_lock(instance->irq_ctrl_lock); |
| tmp = inb(instance->irq_ctrl_reg); |
| tmp |= |
| (ME8200_DI_IRQ_CTRL_BIT_CLEAR << |
| (ME8200_DI_IRQ_CTRL_SHIFT * instance->di_idx)); |
| tmp |= |
| ME8200_DI_IRQ_CTRL_BIT_ENABLE << (ME8200_DI_IRQ_CTRL_SHIFT * |
| instance->di_idx); |
| |
| if (irq_source == ME_IRQ_SOURCE_DIO_MASK) { |
| tmp &= |
| ~(ME8200_DI_IRQ_CTRL_MASK_EDGE << |
| (ME8200_DI_IRQ_CTRL_SHIFT * instance->di_idx)); |
| if (irq_edge == ME_IRQ_EDGE_RISING) { |
| tmp |= |
| ME8200_DI_IRQ_CTRL_MASK_EDGE_RISING << |
| (ME8200_DI_IRQ_CTRL_SHIFT * instance->di_idx); |
| } else if (irq_edge == ME_IRQ_EDGE_FALLING) { |
| tmp |= |
| ME8200_DI_IRQ_CTRL_MASK_EDGE_FALLING << |
| (ME8200_DI_IRQ_CTRL_SHIFT * instance->di_idx); |
| } else if (irq_edge == ME_IRQ_EDGE_ANY) { |
| tmp |= |
| ME8200_DI_IRQ_CTRL_MASK_EDGE_ANY << |
| (ME8200_DI_IRQ_CTRL_SHIFT * instance->di_idx); |
| } |
| } |
| outb(tmp, instance->irq_ctrl_reg); |
| PDEBUG_REG("irq_ctrl_reg outb(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| instance->irq_ctrl_reg - instance->reg_base, tmp); |
| tmp &= |
| ~(ME8200_DI_IRQ_CTRL_BIT_CLEAR << |
| (ME8200_DI_IRQ_CTRL_SHIFT * instance->di_idx)); |
| outb(tmp, instance->irq_ctrl_reg); |
| PDEBUG_REG("irq_ctrl_reg outb(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| instance->irq_ctrl_reg - instance->reg_base, tmp); |
| |
| instance->line_value = inb(instance->port_reg); |
| spin_unlock(instance->irq_ctrl_lock); |
| |
| instance->rised = 0; |
| instance->status_value = 0; |
| instance->status_value_edges = 0; |
| instance->status_flag = flags & ME_IO_IRQ_START_EXTENDED_STATUS; |
| spin_unlock_irqrestore(&instance->subdevice_lock, status); |
| ME_SUBDEVICE_EXIT; |
| |
| return err; |
| } |
| |
| static int me8200_di_io_irq_wait(me_subdevice_t * subdevice, |
| struct file *filep, |
| int channel, |
| int *irq_count, |
| int *value, int time_out, int flags) |
| { |
| me8200_di_subdevice_t *instance; |
| int err = ME_ERRNO_SUCCESS; |
| long t = 0; |
| unsigned long cpu_flags; |
| int count; |
| |
| PDEBUG("executed.\n"); |
| PDEVELOP("PID: %d.\n", current->pid); |
| |
| instance = (me8200_di_subdevice_t *) subdevice; |
| |
| if (flags & |
| ~(ME_IO_IRQ_WAIT_NORMAL_STATUS | ME_IO_IRQ_WAIT_EXTENDED_STATUS)) { |
| 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; |
| count = instance->count; |
| |
| if (time_out) { |
| t = wait_event_interruptible_timeout(instance-> |
| wait_queue, |
| ((count != |
| instance->count) |
| || (instance-> |
| rised < 0)), |
| t); |
| // 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, |
| ((count != instance->count) |
| || (instance->rised < 0))); |
| // 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); |
| *irq_count = instance->count; |
| if (!err) { |
| if (flags & ME_IO_IRQ_WAIT_NORMAL_STATUS) { |
| *value = instance->status_value; |
| } else if (flags & ME_IO_IRQ_WAIT_EXTENDED_STATUS) { |
| *value = instance->status_value_edges; |
| } else { // Use default |
| if (!instance->status_flag) { |
| *value = instance->status_value; |
| } else { |
| *value = instance->status_value_edges; |
| } |
| } |
| instance->rised = 0; |
| /* |
| instance->status_value = 0; |
| instance->status_value_edges = 0; |
| */ |
| } else { |
| *value = 0; |
| } |
| spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags); |
| |
| ME_SUBDEVICE_EXIT; |
| |
| return err; |
| } |
| |
| static int me8200_di_io_irq_stop(me_subdevice_t * subdevice, |
| struct file *filep, int channel, int flags) |
| { |
| me8200_di_subdevice_t *instance; |
| uint8_t tmp; |
| unsigned long status; |
| |
| PDEBUG("executed.\n"); |
| |
| instance = (me8200_di_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, status); |
| spin_lock(instance->irq_ctrl_lock); |
| tmp = inb(instance->irq_ctrl_reg); |
| tmp |= |
| (ME8200_DI_IRQ_CTRL_BIT_ENABLE << |
| (ME8200_DI_IRQ_CTRL_SHIFT * instance->di_idx)); |
| outb(tmp, instance->irq_ctrl_reg); |
| PDEBUG_REG("irq_ctrl_reg outb(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| instance->irq_ctrl_reg - instance->reg_base, tmp); |
| tmp &= |
| ~(ME8200_DI_IRQ_CTRL_BIT_ENABLE << |
| (ME8200_DI_IRQ_CTRL_SHIFT * instance->di_idx)); |
| tmp |= |
| (ME8200_DI_IRQ_CTRL_BIT_CLEAR << |
| (ME8200_DI_IRQ_CTRL_SHIFT * instance->di_idx)); |
| // tmp &= ~(ME8200_DI_IRQ_CTRL_BIT_CLEAR << (ME8200_DI_IRQ_CTRL_SHIFT * instance->di_idx)); |
| outb(tmp, instance->irq_ctrl_reg); |
| PDEBUG_REG("irq_ctrl_reg outb(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| instance->irq_ctrl_reg - instance->reg_base, tmp); |
| spin_unlock(instance->irq_ctrl_lock); |
| |
| instance->rised = -1; |
| instance->status_value = 0; |
| instance->status_value_edges = 0; |
| instance->filtering_flag = 0; |
| spin_unlock_irqrestore(&instance->subdevice_lock, status); |
| wake_up_interruptible_all(&instance->wait_queue); |
| |
| ME_SUBDEVICE_EXIT; |
| |
| return ME_ERRNO_SUCCESS; |
| } |
| |
| static int me8200_di_io_single_config(me_subdevice_t * subdevice, |
| struct file *filep, |
| int channel, |
| int single_config, |
| int ref, |
| int trig_chan, |
| int trig_type, int trig_edge, int flags) |
| { |
| me8200_di_subdevice_t *instance; |
| int err = ME_ERRNO_SUCCESS; |
| unsigned long status; |
| |
| PDEBUG("executed.\n"); |
| |
| instance = (me8200_di_subdevice_t *) subdevice; |
| |
| ME_SUBDEVICE_ENTER; |
| |
| spin_lock_irqsave(&instance->subdevice_lock, status); |
| |
| switch (flags) { |
| case ME_IO_SINGLE_CONFIG_NO_FLAGS: |
| case ME_IO_SINGLE_CONFIG_DIO_BYTE: |
| if (channel == 0) { |
| if (single_config == ME_SINGLE_CONFIG_DIO_INPUT) { |
| } else { |
| PERROR("Invalid port direction specified.\n"); |
| err = ME_ERRNO_INVALID_SINGLE_CONFIG; |
| } |
| } else { |
| PERROR("Invalid channel number.\n"); |
| err = ME_ERRNO_INVALID_CHANNEL; |
| } |
| break; |
| |
| default: |
| PERROR("Invalid flags specified.\n"); |
| err = ME_ERRNO_INVALID_FLAGS; |
| } |
| |
| spin_unlock_irqrestore(&instance->subdevice_lock, status); |
| |
| ME_SUBDEVICE_EXIT; |
| |
| return err; |
| } |
| |
| static int me8200_di_io_single_read(me_subdevice_t * subdevice, |
| struct file *filep, |
| int channel, |
| int *value, int time_out, int flags) |
| { |
| me8200_di_subdevice_t *instance; |
| int err = ME_ERRNO_SUCCESS; |
| unsigned long status; |
| |
| PDEBUG("executed.\n"); |
| |
| instance = (me8200_di_subdevice_t *) subdevice; |
| |
| ME_SUBDEVICE_ENTER; |
| |
| spin_lock_irqsave(&instance->subdevice_lock, status); |
| |
| switch (flags) { |
| case ME_IO_SINGLE_TYPE_DIO_BIT: |
| if ((channel >= 0) && (channel < 8)) { |
| *value = inb(instance->port_reg) & (0x1 << channel); |
| } else { |
| PERROR("Invalid bit number specified.\n"); |
| err = ME_ERRNO_INVALID_CHANNEL; |
| } |
| break; |
| |
| case ME_IO_SINGLE_NO_FLAGS: |
| case ME_IO_SINGLE_TYPE_DIO_BYTE: |
| if (channel == 0) { |
| *value = inb(instance->port_reg); |
| } else { |
| PERROR("Invalid channel number.\n"); |
| err = ME_ERRNO_INVALID_CHANNEL; |
| } |
| break; |
| |
| default: |
| PERROR("Invalid flags specified.\n"); |
| err = ME_ERRNO_INVALID_FLAGS; |
| } |
| |
| spin_unlock_irqrestore(&instance->subdevice_lock, status); |
| |
| ME_SUBDEVICE_EXIT; |
| |
| return err; |
| } |
| |
| static int me8200_di_io_reset_subdevice(struct me_subdevice *subdevice, |
| struct file *filep, int flags) |
| { |
| me8200_di_subdevice_t *instance = (me8200_di_subdevice_t *) subdevice; |
| |
| PDEBUG("executed.\n"); |
| |
| if (flags) { |
| PERROR("Invalid flag specified.\n"); |
| return ME_ERRNO_INVALID_FLAGS; |
| } |
| |
| instance->count = 0; |
| return me8200_di_io_irq_stop(subdevice, filep, 0, 0); |
| } |
| |
| static int me8200_di_query_number_channels(me_subdevice_t * subdevice, |
| int *number) |
| { |
| PDEBUG("executed.\n"); |
| *number = 8; |
| return ME_ERRNO_SUCCESS; |
| } |
| |
| static int me8200_di_query_subdevice_type(me_subdevice_t * subdevice, |
| int *type, int *subtype) |
| { |
| PDEBUG("executed.\n"); |
| *type = ME_TYPE_DI; |
| *subtype = ME_SUBTYPE_SINGLE; |
| return ME_ERRNO_SUCCESS; |
| } |
| |
| static int me8200_di_query_subdevice_caps(me_subdevice_t * subdevice, int *caps) |
| { |
| PDEBUG("executed.\n"); |
| *caps = |
| ME_CAPS_DIO_BIT_PATTERN_IRQ | |
| ME_CAPS_DIO_BIT_MASK_IRQ_EDGE_RISING | |
| ME_CAPS_DIO_BIT_MASK_IRQ_EDGE_FALLING | |
| ME_CAPS_DIO_BIT_MASK_IRQ_EDGE_ANY; |
| return ME_ERRNO_SUCCESS; |
| } |
| |
| #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19) |
| static irqreturn_t me8200_isr(int irq, void *dev_id) |
| #else |
| static irqreturn_t me8200_isr(int irq, void *dev_id, struct pt_regs *regs) |
| #endif |
| { |
| me8200_di_subdevice_t *instance; |
| uint8_t ctrl; |
| uint8_t irq_status; |
| uint8_t line_value = 0; |
| uint8_t line_status = 0; |
| uint32_t status_val = 0; |
| |
| instance = (me8200_di_subdevice_t *) dev_id; |
| |
| if (irq != instance->irq) { |
| PERROR("Incorrect interrupt num: %d.\n", irq); |
| return IRQ_NONE; |
| } |
| |
| irq_status = inb(instance->irq_status_reg); |
| if (!irq_status) { |
| PINFO |
| ("%ld Shared interrupt. %s(): idx=%d irq_status_reg=0x%04X\n", |
| jiffies, __func__, instance->di_idx, irq_status); |
| return IRQ_NONE; |
| } |
| |
| PDEBUG("executed.\n"); |
| |
| spin_lock(&instance->subdevice_lock); |
| spin_lock(instance->irq_ctrl_lock); |
| ctrl = inb(instance->irq_ctrl_reg); |
| ctrl |= |
| ME8200_DI_IRQ_CTRL_BIT_CLEAR << (ME8200_DI_IRQ_CTRL_SHIFT * |
| instance->di_idx); |
| outb(ctrl, instance->irq_ctrl_reg); |
| PDEBUG_REG("irq_ctrl_reg outb(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| instance->irq_ctrl_reg - instance->reg_base, ctrl); |
| ctrl &= |
| ~(ME8200_DI_IRQ_CTRL_BIT_CLEAR << |
| (ME8200_DI_IRQ_CTRL_SHIFT * instance->di_idx)); |
| outb(ctrl, instance->irq_ctrl_reg); |
| PDEBUG_REG("irq_ctrl_reg outb(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| instance->irq_ctrl_reg - instance->reg_base, ctrl); |
| |
| line_value = inb(instance->port_reg); |
| spin_unlock(instance->irq_ctrl_lock); |
| |
| line_status = ((uint8_t) instance->line_value ^ line_value); |
| |
| // Make extended information. |
| status_val |= (0x00FF & (~(uint8_t) instance->line_value & line_value)) << 16; //Raise |
| status_val |= (0x00FF & ((uint8_t) instance->line_value & ~line_value)); //Fall |
| |
| instance->line_value = (int)line_value; |
| |
| if (instance->rised == 0) { |
| instance->status_value = irq_status | line_status; |
| instance->status_value_edges = status_val; |
| } else { |
| instance->status_value |= irq_status | line_status; |
| instance->status_value_edges |= status_val; |
| } |
| |
| if (instance->filtering_flag) { // For compare mode only. |
| if (instance->compare_value == instance->line_value) { |
| instance->rised = 1; |
| instance->count++; |
| } |
| } else { |
| instance->rised = 1; |
| instance->count++; |
| } |
| spin_unlock(&instance->subdevice_lock); |
| |
| spin_unlock(&instance->subdevice_lock); |
| |
| wake_up_interruptible_all(&instance->wait_queue); |
| |
| return IRQ_HANDLED; |
| } |
| |
| #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19) |
| static irqreturn_t me8200_isr_EX(int irq, void *dev_id) |
| #else |
| static irqreturn_t me8200_isr_EX(int irq, void *dev_id, struct pt_regs *regs) |
| #endif |
| { |
| me8200_di_subdevice_t *instance; |
| uint8_t irq_status = 0; |
| uint16_t irq_status_EX = 0; |
| uint32_t status_val = 0; |
| int i, j; |
| |
| instance = (me8200_di_subdevice_t *) dev_id; |
| |
| if (irq != instance->irq) { |
| PERROR("Incorrect interrupt num: %d.\n", irq); |
| return IRQ_NONE; |
| } |
| |
| PDEBUG("executed.\n"); |
| |
| //Reset latches. Copy status to extended registers. |
| irq_status = inb(instance->irq_status_reg); |
| PDEBUG_REG("idx=%d irq_status_reg=0x%02X\n", instance->di_idx, |
| irq_status); |
| |
| if (!irq_status) { |
| PINFO |
| ("%ld Shared interrupt. %s(): idx=%d irq_status_reg=0x%04X\n", |
| jiffies, __func__, instance->di_idx, irq_status); |
| return IRQ_NONE; |
| } |
| |
| irq_status_EX = inb(instance->irq_status_low_reg); |
| irq_status_EX |= (inb(instance->irq_status_high_reg) << 8); |
| |
| PDEVELOP("EXTENDED REG: 0x%04x\n", irq_status_EX); |
| instance->line_value = inb(instance->port_reg); |
| |
| // Format extended information. |
| for (i = 0, j = 0; i < 8; i++, j += 2) { |
| status_val |= ((0x01 << j) & irq_status_EX) >> (j - i); //Fall |
| status_val |= ((0x01 << (j + 1)) & irq_status_EX) << (15 - j + i); //Raise |
| } |
| |
| spin_lock(&instance->subdevice_lock); |
| if (instance->rised == 0) { |
| instance->status_value = irq_status; |
| instance->status_value_edges = status_val; |
| } else { |
| instance->status_value |= irq_status; |
| instance->status_value_edges |= status_val; |
| } |
| |
| if (instance->filtering_flag) { // For compare mode only. |
| if (instance->compare_value == instance->line_value) { |
| instance->rised = 1; |
| instance->count++; |
| } |
| } else { |
| instance->rised = 1; |
| instance->count++; |
| } |
| spin_unlock(&instance->subdevice_lock); |
| |
| wake_up_interruptible_all(&instance->wait_queue); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static void me8200_di_destructor(struct me_subdevice *subdevice) |
| { |
| me8200_di_subdevice_t *instance; |
| |
| PDEBUG("executed.\n"); |
| |
| instance = (me8200_di_subdevice_t *) subdevice; |
| |
| free_irq(instance->irq, (void *)instance); |
| me_subdevice_deinit(&instance->base); |
| kfree(instance); |
| } |
| |
| me8200_di_subdevice_t *me8200_di_constructor(uint32_t me8200_regbase, |
| unsigned int di_idx, |
| int irq, |
| spinlock_t * irq_ctrl_lock, |
| spinlock_t * irq_mode_lock) |
| { |
| me8200_di_subdevice_t *subdevice; |
| int err; |
| |
| PDEBUG("executed.\n"); |
| |
| /* Allocate memory for subdevice instance */ |
| subdevice = kmalloc(sizeof(me8200_di_subdevice_t), GFP_KERNEL); |
| |
| if (!subdevice) { |
| PERROR("Cannot get memory for subdevice instance.\n"); |
| return NULL; |
| } |
| |
| memset(subdevice, 0, sizeof(me8200_di_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; |
| } |
| // Check firmware version. |
| me8200_di_check_version(subdevice, |
| me8200_regbase + ME8200_FIRMWARE_VERSION_REG); |
| |
| // Initialize spin locks. |
| spin_lock_init(&subdevice->subdevice_lock); |
| |
| subdevice->irq_ctrl_lock = irq_ctrl_lock; |
| subdevice->irq_mode_lock = irq_mode_lock; |
| |
| /* Save the subdevice index. */ |
| subdevice->di_idx = di_idx; |
| |
| /* Initialize registers */ |
| if (di_idx == 0) { |
| subdevice->port_reg = me8200_regbase + ME8200_DI_PORT_0_REG; |
| subdevice->mask_reg = me8200_regbase + ME8200_DI_MASK_0_REG; |
| subdevice->compare_reg = |
| me8200_regbase + ME8200_DI_COMPARE_0_REG; |
| subdevice->irq_status_reg = |
| me8200_regbase + ME8200_DI_CHANGE_0_REG; |
| |
| subdevice->irq_status_low_reg = |
| me8200_regbase + ME8200_DI_EXTEND_CHANGE_0_LOW_REG; |
| subdevice->irq_status_high_reg = |
| me8200_regbase + ME8200_DI_EXTEND_CHANGE_0_HIGH_REG; |
| } else if (di_idx == 1) { |
| subdevice->port_reg = me8200_regbase + ME8200_DI_PORT_1_REG; |
| subdevice->mask_reg = me8200_regbase + ME8200_DI_MASK_1_REG; |
| subdevice->compare_reg = |
| me8200_regbase + ME8200_DI_COMPARE_1_REG; |
| subdevice->irq_status_reg = |
| me8200_regbase + ME8200_DI_CHANGE_1_REG; |
| |
| subdevice->irq_status_low_reg = |
| me8200_regbase + ME8200_DI_EXTEND_CHANGE_1_LOW_REG; |
| subdevice->irq_status_high_reg = |
| me8200_regbase + ME8200_DI_EXTEND_CHANGE_1_HIGH_REG; |
| } else { |
| PERROR("Wrong subdevice idx=%d.\n", di_idx); |
| kfree(subdevice); |
| return NULL; |
| } |
| subdevice->irq_ctrl_reg = me8200_regbase + ME8200_DI_IRQ_CTRL_REG; |
| subdevice->irq_mode_reg = me8200_regbase + ME8200_IRQ_MODE_REG; |
| #ifdef MEDEBUG_DEBUG_REG |
| subdevice->reg_base = me8200_regbase; |
| #endif |
| |
| /* Initialize wait queue */ |
| init_waitqueue_head(&subdevice->wait_queue); |
| |
| /* Overload base class methods. */ |
| subdevice->base.me_subdevice_io_irq_start = me8200_di_io_irq_start; |
| subdevice->base.me_subdevice_io_irq_wait = me8200_di_io_irq_wait; |
| subdevice->base.me_subdevice_io_irq_stop = me8200_di_io_irq_stop; |
| subdevice->base.me_subdevice_io_reset_subdevice = |
| me8200_di_io_reset_subdevice; |
| subdevice->base.me_subdevice_io_single_config = |
| me8200_di_io_single_config; |
| subdevice->base.me_subdevice_io_single_read = me8200_di_io_single_read; |
| subdevice->base.me_subdevice_query_number_channels = |
| me8200_di_query_number_channels; |
| subdevice->base.me_subdevice_query_subdevice_type = |
| me8200_di_query_subdevice_type; |
| subdevice->base.me_subdevice_query_subdevice_caps = |
| me8200_di_query_subdevice_caps; |
| subdevice->base.me_subdevice_destructor = me8200_di_destructor; |
| |
| subdevice->rised = 0; |
| subdevice->count = 0; |
| |
| /* Register interrupt service routine. */ |
| subdevice->irq = irq; |
| if (subdevice->version > 0) { // NEW |
| err = request_irq(subdevice->irq, me8200_isr_EX, |
| #ifdef IRQF_DISABLED |
| IRQF_DISABLED | IRQF_SHARED, |
| #else |
| SA_INTERRUPT | SA_SHIRQ, |
| #endif |
| ME8200_NAME, (void *)subdevice); |
| } else { //OLD |
| err = request_irq(subdevice->irq, me8200_isr, |
| #ifdef IRQF_DISABLED |
| IRQF_DISABLED | IRQF_SHARED, |
| #else |
| SA_INTERRUPT | SA_SHIRQ, |
| #endif |
| ME8200_NAME, (void *)subdevice); |
| } |
| |
| if (err) { |
| PERROR("Cannot initialize subdevice base class instance.\n"); |
| kfree(subdevice); |
| return NULL; |
| } |
| PDEBUG("Registred irq=%d.\n", subdevice->irq); |
| |
| return subdevice; |
| } |
| |
| static void me8200_di_check_version(me8200_di_subdevice_t * instance, |
| unsigned long addr) |
| { |
| |
| PDEBUG("executed.\n"); |
| instance->version = 0x000000FF & inb(addr); |
| PDEVELOP("me8200 firmware version: %d\n", instance->version); |
| |
| /// @note Fix for wrong values in this registry. |
| if ((instance->version < 0x7) || (instance->version > 0x1F)) |
| instance->version = 0x0; |
| } |