diff options
Diffstat (limited to 'drivers/staging/meilhaus/me8200_do.c')
| -rw-r--r-- | drivers/staging/meilhaus/me8200_do.c | 600 |
1 files changed, 600 insertions, 0 deletions
diff --git a/drivers/staging/meilhaus/me8200_do.c b/drivers/staging/meilhaus/me8200_do.c new file mode 100644 index 00000000000..d2bebd16ff4 --- /dev/null +++ b/drivers/staging/meilhaus/me8200_do.c @@ -0,0 +1,600 @@ +/** + * @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; +} |