| /** |
| * @file me8200_do.c |
| * |
| * @brief ME-8200 digital output 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 <asm/io.h> |
| #include <linux/types.h> |
| #include <linux/version.h> |
| |
| #include "medefines.h" |
| #include "meinternal.h" |
| #include "meerror.h" |
| |
| #include "meids.h" |
| #include "medebug.h" |
| #include "me8200_reg.h" |
| #include "me8200_do_reg.h" |
| #include "me8200_do.h" |
| |
| /* |
| * Defines |
| */ |
| |
| /* |
| * Functions |
| */ |
| |
| static int me8200_do_io_irq_start(me_subdevice_t * subdevice, |
| struct file *filep, |
| int channel, |
| int irq_source, |
| int irq_edge, int irq_arg, int flags) |
| { |
| me8200_do_subdevice_t *instance; |
| int err = ME_ERRNO_SUCCESS; |
| uint8_t tmp; |
| unsigned long status; |
| |
| if (flags & ~ME_IO_IRQ_START_DIO_BYTE) { |
| PERROR("Invalid flag specified.\n"); |
| return ME_ERRNO_INVALID_FLAGS; |
| } |
| |
| if (channel != 0) { |
| PERROR("Invalid channel specified.\n"); |
| return ME_ERRNO_INVALID_CHANNEL; |
| } |
| |
| if (irq_source != ME_IRQ_SOURCE_DIO_OVER_TEMP) { |
| PERROR("Invalid interrupt source specified.\n"); |
| return ME_ERRNO_INVALID_IRQ_SOURCE; |
| } |
| |
| PDEBUG("executed.\n"); |
| |
| instance = (me8200_do_subdevice_t *) subdevice; |
| |
| ME_SUBDEVICE_ENTER; |
| |
| spin_lock_irqsave(&instance->subdevice_lock, status); |
| spin_lock(instance->irq_mode_lock); |
| tmp = inb(instance->irq_ctrl_reg); |
| tmp |= |
| ME8200_IRQ_MODE_BIT_ENABLE_POWER << (ME8200_IRQ_MODE_POWER_SHIFT * |
| instance->do_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_mode_lock); |
| instance->rised = 0; |
| spin_unlock_irqrestore(&instance->subdevice_lock, status); |
| |
| ME_SUBDEVICE_EXIT; |
| |
| return err; |
| } |
| |
| static int me8200_do_io_irq_wait(me_subdevice_t * subdevice, |
| struct file *filep, |
| int channel, |
| int *irq_count, |
| int *value, int time_out, int flags) |
| { |
| me8200_do_subdevice_t *instance; |
| int err = ME_ERRNO_SUCCESS; |
| long t = 0; |
| unsigned long cpu_flags; |
| |
| PDEBUG("executed.\n"); |
| |
| instance = (me8200_do_subdevice_t *) subdevice; |
| |
| if (flags) { |
| PERROR("Invalid flag specified.\n"); |
| return ME_ERRNO_INVALID_FLAGS; |
| } |
| |
| 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 = 0; |
| spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags); |
| |
| ME_SUBDEVICE_EXIT; |
| |
| return err; |
| } |
| |
| static int me8200_do_io_irq_stop(me_subdevice_t * subdevice, |
| struct file *filep, int channel, int flags) |
| { |
| me8200_do_subdevice_t *instance; |
| uint8_t tmp; |
| unsigned long cpu_flags; |
| |
| PDEBUG("executed.\n"); |
| |
| instance = (me8200_do_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->irq_mode_lock); |
| tmp = inb(instance->irq_ctrl_reg); |
| tmp &= |
| ~(ME8200_IRQ_MODE_BIT_ENABLE_POWER << |
| (ME8200_IRQ_MODE_POWER_SHIFT * instance->do_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_mode_lock); |
| instance->rised = -1; |
| spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags); |
| wake_up_interruptible_all(&instance->wait_queue); |
| |
| ME_SUBDEVICE_EXIT; |
| |
| return ME_ERRNO_SUCCESS; |
| } |
| |
| static int me8200_do_io_reset_subdevice(struct me_subdevice *subdevice, |
| struct file *filep, int flags) |
| { |
| me8200_do_subdevice_t *instance; |
| unsigned long cpu_flags; |
| uint8_t tmp; |
| |
| PDEBUG("executed.\n"); |
| |
| instance = (me8200_do_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); |
| outb(0x00, instance->port_reg); |
| PDEBUG_REG("port_reg outb(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| instance->port_reg - instance->reg_base, 0x00); |
| spin_lock(instance->irq_mode_lock); |
| tmp = inb(instance->irq_ctrl_reg); |
| tmp &= |
| ~(ME8200_IRQ_MODE_BIT_ENABLE_POWER << |
| (ME8200_IRQ_MODE_POWER_SHIFT * instance->do_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_mode_lock); |
| instance->rised = -1; |
| instance->count = 0; |
| spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags); |
| wake_up_interruptible_all(&instance->wait_queue); |
| |
| ME_SUBDEVICE_EXIT; |
| |
| return ME_ERRNO_SUCCESS; |
| } |
| |
| static int me8200_do_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_do_subdevice_t *instance; |
| int err = ME_ERRNO_SUCCESS; |
| unsigned long status; |
| |
| PDEBUG("executed.\n"); |
| |
| instance = (me8200_do_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_OUTPUT) { |
| } else { |
| PERROR("Invalid byte direction specified.\n"); |
| err = ME_ERRNO_INVALID_SINGLE_CONFIG; |
| } |
| } else { |
| PERROR("Invalid byte specified.\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_do_io_single_read(me_subdevice_t * subdevice, |
| struct file *filep, |
| int channel, |
| int *value, int time_out, int flags) |
| { |
| me8200_do_subdevice_t *instance; |
| int err = ME_ERRNO_SUCCESS; |
| unsigned long status; |
| |
| PDEBUG("executed.\n"); |
| |
| instance = (me8200_do_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 byte number specified.\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_do_io_single_write(me_subdevice_t * subdevice, |
| struct file *filep, |
| int channel, |
| int value, int time_out, int flags) |
| { |
| me8200_do_subdevice_t *instance; |
| int err = ME_ERRNO_SUCCESS; |
| uint8_t state; |
| unsigned long status; |
| |
| PDEBUG("executed.\n"); |
| |
| instance = (me8200_do_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)) { |
| state = inb(instance->port_reg); |
| state = |
| value ? (state | (0x1 << channel)) : (state & |
| ~(0x1 << |
| channel)); |
| outb(state, instance->port_reg); |
| PDEBUG_REG("port_reg outb(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->port_reg - instance->reg_base, |
| state); |
| } 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) { |
| outb(value, instance->port_reg); |
| PDEBUG_REG("port_reg outb(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->port_reg - instance->reg_base, |
| value); |
| } else { |
| PERROR("Invalid byte number specified.\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_do_query_number_channels(me_subdevice_t * subdevice, |
| int *number) |
| { |
| PDEBUG("executed.\n"); |
| *number = 8; |
| return ME_ERRNO_SUCCESS; |
| } |
| |
| static int me8200_do_query_subdevice_type(me_subdevice_t * subdevice, |
| int *type, int *subtype) |
| { |
| PDEBUG("executed.\n"); |
| *type = ME_TYPE_DO; |
| *subtype = ME_SUBTYPE_SINGLE; |
| return ME_ERRNO_SUCCESS; |
| } |
| |
| static int me8200_do_query_subdevice_caps(me_subdevice_t * subdevice, int *caps) |
| { |
| PDEBUG("executed.\n"); |
| *caps = ME_CAPS_DIO_OVER_TEMP_IRQ; |
| return ME_ERRNO_SUCCESS; |
| } |
| |
| static void me8200_do_destructor(struct me_subdevice *subdevice) |
| { |
| me8200_do_subdevice_t *instance; |
| |
| PDEBUG("executed.\n"); |
| |
| instance = (me8200_do_subdevice_t *) subdevice; |
| |
| free_irq(instance->irq, (void *)instance); |
| me_subdevice_deinit(&instance->base); |
| kfree(instance); |
| } |
| |
| #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19) |
| static irqreturn_t me8200_do_isr(int irq, void *dev_id) |
| #else |
| static irqreturn_t me8200_do_isr(int irq, void *dev_id, struct pt_regs *regs) |
| #endif |
| { |
| me8200_do_subdevice_t *instance; |
| uint16_t ctrl; |
| uint8_t irq_status; |
| |
| instance = (me8200_do_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 & |
| (ME8200_DO_IRQ_STATUS_BIT_ACTIVE << instance->do_idx))) { |
| PINFO |
| ("%ld Shared interrupt. %s(): idx=%d irq_status_reg=0x%04X\n", |
| jiffies, __func__, instance->do_idx, irq_status); |
| return IRQ_NONE; |
| } |
| |
| PDEBUG("executed.\n"); |
| |
| spin_lock(&instance->subdevice_lock); |
| instance->rised = 1; |
| instance->count++; |
| |
| spin_lock(instance->irq_mode_lock); |
| ctrl = inw(instance->irq_ctrl_reg); |
| ctrl |= ME8200_IRQ_MODE_BIT_CLEAR_POWER << instance->do_idx; |
| outw(ctrl, instance->irq_ctrl_reg); |
| PDEBUG_REG("irq_ctrl_reg outw(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| instance->irq_ctrl_reg - instance->reg_base, ctrl); |
| ctrl &= ~(ME8200_IRQ_MODE_BIT_CLEAR_POWER << instance->do_idx); |
| outw(ctrl, instance->irq_ctrl_reg); |
| PDEBUG_REG("irq_ctrl_reg outw(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| instance->irq_ctrl_reg - instance->reg_base, ctrl); |
| spin_unlock(instance->irq_mode_lock); |
| spin_unlock(&instance->subdevice_lock); |
| wake_up_interruptible_all(&instance->wait_queue); |
| |
| return IRQ_HANDLED; |
| } |
| |
| me8200_do_subdevice_t *me8200_do_constructor(uint32_t reg_base, |
| unsigned int do_idx, |
| int irq, |
| spinlock_t * irq_mode_lock) |
| { |
| me8200_do_subdevice_t *subdevice; |
| int err; |
| |
| PDEBUG("executed.\n"); |
| |
| /* Allocate memory for subdevice instance */ |
| subdevice = kmalloc(sizeof(me8200_do_subdevice_t), GFP_KERNEL); |
| |
| if (!subdevice) { |
| PERROR("Cannot get memory for subdevice instance.\n"); |
| return NULL; |
| } |
| |
| memset(subdevice, 0, sizeof(me8200_do_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->irq_mode_lock = irq_mode_lock; |
| |
| /* Save the index of the digital output */ |
| subdevice->do_idx = do_idx; |
| subdevice->irq = irq; |
| |
| /* Initialize the registers */ |
| if (do_idx == 0) { |
| subdevice->port_reg = reg_base + ME8200_DO_PORT_0_REG; |
| } else if (do_idx == 1) { |
| subdevice->port_reg = reg_base + ME8200_DO_PORT_1_REG; |
| } else { |
| PERROR("Wrong subdevice idx=%d.\n", do_idx); |
| kfree(subdevice); |
| return NULL; |
| } |
| subdevice->irq_ctrl_reg = reg_base + ME8200_IRQ_MODE_REG; |
| subdevice->irq_status_reg = reg_base + ME8200_DO_IRQ_STATUS_REG; |
| #ifdef MEDEBUG_DEBUG_REG |
| subdevice->reg_base = reg_base; |
| #endif |
| |
| /* Initialize the wait queue */ |
| init_waitqueue_head(&subdevice->wait_queue); |
| |
| /* Request the interrupt line */ |
| err = request_irq(irq, me8200_do_isr, |
| #ifdef IRQF_DISABLED |
| IRQF_DISABLED | IRQF_SHARED, |
| #else |
| SA_INTERRUPT | SA_SHIRQ, |
| #endif |
| ME8200_NAME, (void *)subdevice); |
| |
| if (err) { |
| PERROR("Cannot get interrupt line.\n"); |
| kfree(subdevice); |
| return NULL; |
| } |
| PINFO("Registered irq=%d.\n", irq); |
| |
| /* Overload base class methods. */ |
| subdevice->base.me_subdevice_io_irq_start = me8200_do_io_irq_start; |
| subdevice->base.me_subdevice_io_irq_wait = me8200_do_io_irq_wait; |
| subdevice->base.me_subdevice_io_irq_stop = me8200_do_io_irq_stop; |
| subdevice->base.me_subdevice_io_reset_subdevice = |
| me8200_do_io_reset_subdevice; |
| subdevice->base.me_subdevice_io_single_config = |
| me8200_do_io_single_config; |
| subdevice->base.me_subdevice_io_single_read = me8200_do_io_single_read; |
| subdevice->base.me_subdevice_io_single_write = |
| me8200_do_io_single_write; |
| subdevice->base.me_subdevice_query_number_channels = |
| me8200_do_query_number_channels; |
| subdevice->base.me_subdevice_query_subdevice_type = |
| me8200_do_query_subdevice_type; |
| subdevice->base.me_subdevice_query_subdevice_caps = |
| me8200_do_query_subdevice_caps; |
| subdevice->base.me_subdevice_destructor = me8200_do_destructor; |
| |
| subdevice->rised = 0; |
| subdevice->count = 0; |
| |
| return subdevice; |
| } |