diff options
Diffstat (limited to 'drivers/staging/meilhaus/me8100_di.c')
| -rw-r--r-- | drivers/staging/meilhaus/me8100_di.c | 693 |
1 files changed, 693 insertions, 0 deletions
diff --git a/drivers/staging/meilhaus/me8100_di.c b/drivers/staging/meilhaus/me8100_di.c new file mode 100644 index 000000000000..971727c9e305 --- /dev/null +++ b/drivers/staging/meilhaus/me8100_di.c @@ -0,0 +1,693 @@ +/** + * @file me8100_di.c + * + * @brief ME-8100 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 "meplx_reg.h" +#include "me8100_reg.h" +#include "me8100_di_reg.h" +#include "me8100_di.h" + +/* + * Defines + */ + +/* + * Functions + */ + +static int me8100_di_io_reset_subdevice(struct me_subdevice *subdevice, + struct file *filep, int flags) +{ + me8100_di_subdevice_t *instance; + unsigned short ctrl; + unsigned long cpu_flags; + + PDEBUG("executed.\n"); + + instance = (me8100_di_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); + ctrl = inw(instance->ctrl_reg); + ctrl &= ~(ME8100_DIO_CTRL_BIT_INTB_1 | ME8100_DIO_CTRL_BIT_INTB_0); + outw(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); + + outw(0, instance->mask_reg); + PDEBUG_REG("mask_reg outw(0x%lX+0x%lX)=0x%x\n", instance->reg_base, + instance->mask_reg - instance->reg_base, 0); + outw(0, instance->pattern_reg); + PDEBUG_REG("pattern_reg outw(0x%lX+0x%lX)=0x%x\n", instance->reg_base, + instance->pattern_reg - instance->reg_base, 0); + instance->rised = -1; + instance->irq_count = 0; + instance->filtering_flag = 0; + spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags); + + outl(PLX_INTCSR_LOCAL_INT1_EN | + PLX_INTCSR_LOCAL_INT1_POL | + PLX_INTCSR_LOCAL_INT2_EN | + PLX_INTCSR_LOCAL_INT2_POL | + PLX_INTCSR_PCI_INT_EN, instance->irq_status_reg); + PDEBUG_REG("plx:irq_status_reg outl(0x%lX)=0x%x\n", + instance->irq_status_reg, + PLX_INTCSR_LOCAL_INT1_EN | PLX_INTCSR_LOCAL_INT1_POL | + PLX_INTCSR_LOCAL_INT2_EN | PLX_INTCSR_LOCAL_INT2_POL | + PLX_INTCSR_PCI_INT_EN); + + wake_up_interruptible_all(&instance->wait_queue); + ME_SUBDEVICE_EXIT; + + return ME_ERRNO_SUCCESS; +} + +static int me8100_di_io_irq_start(me_subdevice_t * subdevice, + struct file *filep, + int channel, + int irq_source, + int irq_edge, int irq_arg, int flags) +{ + me8100_di_subdevice_t *instance; + int err = ME_ERRNO_SUCCESS; + uint16_t ctrl; + unsigned long cpu_flags; + + PDEBUG("executed.\n"); + + instance = (me8100_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_WORD)) { + 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_WORD)) { + PERROR("Invalid flag specified.\n"); + return ME_ERRNO_INVALID_FLAGS; + } + + if (irq_edge != ME_IRQ_EDGE_ANY) { + PERROR("Invalid irq edge specified.\n"); + return ME_ERRNO_INVALID_IRQ_EDGE; + } + + if (!(irq_arg & 0xFFFF)) { + 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, cpu_flags); + if (irq_source == ME_IRQ_SOURCE_DIO_PATTERN) { + outw(irq_arg, instance->pattern_reg); + 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) { + outw(irq_arg, instance->mask_reg); + } + + spin_lock(instance->ctrl_reg_lock); + ctrl = inw(instance->ctrl_reg); + ctrl |= ME8100_DIO_CTRL_BIT_INTB_0; + if (irq_source == ME_IRQ_SOURCE_DIO_PATTERN) { + ctrl &= ~ME8100_DIO_CTRL_BIT_INTB_1; + } + + if (irq_source == ME_IRQ_SOURCE_DIO_MASK) { + ctrl |= ME8100_DIO_CTRL_BIT_INTB_1; + } + outw(ctrl, instance->ctrl_reg); + PDEBUG_REG("ctrl_reg outw(0x%lX+0x%lX)=0x%x\n", instance->reg_base, + instance->ctrl_reg - instance->reg_base, ctrl); + spin_unlock(instance->ctrl_reg_lock); + + instance->rised = 0; + instance->status_value = 0; + instance->status_value_edges = 0; + instance->line_value = inw(instance->port_reg); + instance->status_flag = flags & ME_IO_IRQ_START_EXTENDED_STATUS; + spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags); + + ME_SUBDEVICE_EXIT; + + return err; +} + +static int me8100_di_io_irq_wait(me_subdevice_t * subdevice, + struct file *filep, + int channel, + int *irq_count, + int *value, int time_out, int flags) +{ + me8100_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 = (me8100_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->irq_count; + + if (time_out) { + t = wait_event_interruptible_timeout(instance-> + wait_queue, + ((count != + instance-> + irq_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->irq_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->irq_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 me8100_di_io_irq_stop(me_subdevice_t * subdevice, + struct file *filep, int channel, int flags) +{ + me8100_di_subdevice_t *instance; + uint16_t ctrl; + unsigned long cpu_flags; + + PDEBUG("executed.\n"); + + instance = (me8100_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, cpu_flags); + spin_lock(instance->ctrl_reg_lock); + ctrl = inw(instance->ctrl_reg); + ctrl &= ~(ME8100_DIO_CTRL_BIT_INTB_1 | ME8100_DIO_CTRL_BIT_INTB_0); + outw(ctrl, instance->ctrl_reg); + PDEBUG_REG("ctrl_reg outw(0x%lX+0x%lX)=0x%x\n", instance->reg_base, + instance->ctrl_reg - instance->reg_base, ctrl); + spin_unlock(instance->ctrl_reg_lock); + instance->rised = -1; + instance->status_value = 0; + instance->status_value_edges = 0; + instance->filtering_flag = 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 me8100_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) +{ + me8100_di_subdevice_t *instance; + int err = ME_ERRNO_SUCCESS; + + PDEBUG("executed.\n"); + + instance = (me8100_di_subdevice_t *) subdevice; + + ME_SUBDEVICE_ENTER; + + spin_lock(&instance->subdevice_lock); + + switch (flags) { + case ME_IO_SINGLE_CONFIG_NO_FLAGS: + case ME_IO_SINGLE_CONFIG_DIO_WORD: + if (channel == 0) { + if (single_config == ME_SINGLE_CONFIG_DIO_INPUT) { + } else { + PERROR + ("Invalid port configuration 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(&instance->subdevice_lock); + + ME_SUBDEVICE_EXIT; + + return err; +} + +static int me8100_di_io_single_read(me_subdevice_t * subdevice, + struct file *filep, + int channel, + int *value, int time_out, int flags) +{ + me8100_di_subdevice_t *instance; + int err = ME_ERRNO_SUCCESS; + + PDEBUG("executed.\n"); + + instance = (me8100_di_subdevice_t *) subdevice; + + ME_SUBDEVICE_ENTER; + + spin_lock(&instance->subdevice_lock); + + switch (flags) { + + case ME_IO_SINGLE_TYPE_DIO_BIT: + if ((channel >= 0) && (channel < 16)) { + *value = inw(instance->port_reg) & (0x1 << channel); + } else { + PERROR("Invalid bit number specified.\n"); + err = ME_ERRNO_INVALID_CHANNEL; + } + break; + + case ME_IO_SINGLE_TYPE_DIO_BYTE: + if (channel == 0) { + *value = inw(instance->port_reg) & 0xFF; + } else if (channel == 1) { + *value = (inw(instance->port_reg) >> 8) & 0xFF; + } else { + PERROR("Invalid byte number specified.\n"); + err = ME_ERRNO_INVALID_CHANNEL; + } + break; + + case ME_IO_SINGLE_NO_FLAGS: + case ME_IO_SINGLE_TYPE_DIO_WORD: + if (channel == 0) { + *value = inw(instance->port_reg); + } else { + PERROR("Invalid word number specified.\n"); + err = ME_ERRNO_INVALID_CHANNEL; + } + + break; + + default: + PERROR("Invalid flags specified.\n"); + err = ME_ERRNO_INVALID_FLAGS; + } + + spin_unlock(&instance->subdevice_lock); + + ME_SUBDEVICE_EXIT; + + return err; +} + +static int me8100_di_query_number_channels(me_subdevice_t * subdevice, + int *number) +{ + PDEBUG("executed.\n"); + *number = 16; + return ME_ERRNO_SUCCESS; +} + +static int me8100_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 me8100_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_ANY; + return ME_ERRNO_SUCCESS; +} + +static void me8100_di_destructor(struct me_subdevice *subdevice) +{ + me8100_di_subdevice_t *instance; + + PDEBUG("executed.\n"); + + instance = (me8100_di_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 me8100_isr(int irq, void *dev_id) +#else +static irqreturn_t me8100_isr(int irq, void *dev_id, struct pt_regs *regs) +#endif +{ + me8100_di_subdevice_t *instance; + uint32_t icsr; + + uint16_t irq_status; + uint16_t line_value = 0; + + uint32_t status_val = 0; + + PDEBUG("executed.\n"); + + instance = (me8100_di_subdevice_t *) dev_id; + + if (irq != instance->irq) { + PERROR("Incorrect interrupt num: %d.\n", irq); + return IRQ_NONE; + } + + icsr = inl(instance->irq_status_reg); + if (instance->di_idx == 0) { + + if ((icsr & + (PLX_INTCSR_LOCAL_INT1_STATE | PLX_INTCSR_PCI_INT_EN | + PLX_INTCSR_LOCAL_INT1_EN)) != + (PLX_INTCSR_LOCAL_INT1_STATE | PLX_INTCSR_PCI_INT_EN | + PLX_INTCSR_LOCAL_INT1_EN)) { + PINFO + ("%ld Shared interrupt. %s(): idx=0 plx:irq_status_reg=0x%04X\n", + jiffies, __func__, icsr); + return IRQ_NONE; + } + } else if (instance->di_idx == 1) { + if ((icsr & + (PLX_INTCSR_LOCAL_INT2_STATE | PLX_INTCSR_PCI_INT_EN | + PLX_INTCSR_LOCAL_INT2_EN)) != + (PLX_INTCSR_LOCAL_INT2_STATE | PLX_INTCSR_PCI_INT_EN | + PLX_INTCSR_LOCAL_INT2_EN)) { + PINFO + ("%ld Shared interrupt. %s(): idx=1 plx:irq_status_reg=0x%04X\n", + jiffies, __func__, icsr); + return IRQ_NONE; + } + } else { + PERROR("%s():Wrong interrupt idx=%d csr=0x%X.\n", __func__, + instance->di_idx, icsr); + return IRQ_NONE; + } + + PDEBUG("me8100_isr():Interrupt from idx=%d occured.\n", + instance->di_idx); + spin_lock(&instance->subdevice_lock); + inw(instance->irq_reset_reg); + line_value = inw(instance->port_reg); + + irq_status = instance->line_value ^ line_value; + + // Make extended information. + status_val |= (0x00FF & (~(uint16_t) instance->line_value & line_value)) << 16; //Raise + status_val |= (0x00FF & ((uint16_t) instance->line_value & ~line_value)); //Fall + + instance->line_value = line_value; + + 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->irq_count++; + } + } else { + instance->rised = 1; + instance->irq_count++; + } + + spin_unlock(&instance->subdevice_lock); + wake_up_interruptible_all(&instance->wait_queue); + + return IRQ_HANDLED; +} + +me8100_di_subdevice_t *me8100_di_constructor(uint32_t me8100_reg_base, + uint32_t plx_reg_base, + unsigned int di_idx, + int irq, + spinlock_t * ctrl_reg_lock) +{ + me8100_di_subdevice_t *subdevice; + int err; + + PDEBUG("executed.\n"); + + /* Allocate memory for subdevice instance */ + subdevice = kmalloc(sizeof(me8100_di_subdevice_t), GFP_KERNEL); + + if (!subdevice) { + PERROR("Cannot get memory for subdevice instance.\n"); + return NULL; + } + + memset(subdevice, 0, sizeof(me8100_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; + } + // Initialize spin locks. + spin_lock_init(&subdevice->subdevice_lock); + + subdevice->ctrl_reg_lock = ctrl_reg_lock; + + /* Save the subdevice index. */ + subdevice->di_idx = di_idx; + + /* Initialize wait queue */ + init_waitqueue_head(&subdevice->wait_queue); + + /* Register interrupt service routine. */ + subdevice->irq = irq; + err = request_irq(subdevice->irq, me8100_isr, +#ifdef IRQF_DISABLED + IRQF_DISABLED | IRQF_SHARED, +#else + SA_INTERRUPT | SA_SHIRQ, +#endif + ME8100_NAME, (void *)subdevice); + + if (err) { + PERROR("Cannot initialize subdevice base class instance.\n"); + kfree(subdevice); + return NULL; + } + PINFO("Registered irq=%d.\n", subdevice->irq); + + /* Initialize the registers */ + subdevice->ctrl_reg = + me8100_reg_base + ME8100_CTRL_REG_A + di_idx * ME8100_REG_OFFSET; + subdevice->port_reg = + me8100_reg_base + ME8100_DI_REG_A + di_idx * ME8100_REG_OFFSET; + subdevice->mask_reg = + me8100_reg_base + ME8100_MASK_REG_A + di_idx * ME8100_REG_OFFSET; + subdevice->pattern_reg = + me8100_reg_base + ME8100_PATTERN_REG_A + di_idx * ME8100_REG_OFFSET; + subdevice->din_int_reg = + me8100_reg_base + ME8100_INT_DI_REG_A + di_idx * ME8100_REG_OFFSET; + subdevice->irq_reset_reg = + me8100_reg_base + ME8100_RES_INT_REG_A + di_idx * ME8100_REG_OFFSET; + subdevice->irq_status_reg = plx_reg_base + PLX_INTCSR; +#ifdef MEDEBUG_DEBUG_REG + subdevice->reg_base = me8100_reg_base; +#endif + + /* Overload base class methods. */ + subdevice->base.me_subdevice_io_irq_start = me8100_di_io_irq_start; + subdevice->base.me_subdevice_io_irq_wait = me8100_di_io_irq_wait; + subdevice->base.me_subdevice_io_irq_stop = me8100_di_io_irq_stop; + subdevice->base.me_subdevice_io_reset_subdevice = + me8100_di_io_reset_subdevice; + subdevice->base.me_subdevice_io_single_config = + me8100_di_io_single_config; + subdevice->base.me_subdevice_io_single_read = me8100_di_io_single_read; + subdevice->base.me_subdevice_query_number_channels = + me8100_di_query_number_channels; + subdevice->base.me_subdevice_query_subdevice_type = + me8100_di_query_subdevice_type; + subdevice->base.me_subdevice_query_subdevice_caps = + me8100_di_query_subdevice_caps; + subdevice->base.me_subdevice_destructor = me8100_di_destructor; + + subdevice->rised = 0; + subdevice->irq_count = 0; + + return subdevice; +} |