451084d2e0
Cc: David Kiliani <mail@davidkiliani.de> Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
247 lines
5.7 KiB
C
247 lines
5.7 KiB
C
/**
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* @file me0900_di.c
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*
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* @brief ME-9x digital input subdevice instance.
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* @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
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* @author Guenter Gebhardt
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*/
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/*
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* Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
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*
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* This file is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __KERNEL__
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# define __KERNEL__
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#endif
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/*
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* Includes
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/io.h>
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#include <linux/types.h>
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#include <linux/interrupt.h>
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#include <linux/version.h>
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#include "medefines.h"
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#include "meinternal.h"
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#include "meerror.h"
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#include "meids.h"
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#include "medebug.h"
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#include "meplx_reg.h"
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#include "me0900_reg.h"
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#include "me0900_di.h"
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/*
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* Defines
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*/
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/*
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* Functions
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*/
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static int me0900_di_io_reset_subdevice(struct me_subdevice *subdevice,
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struct file *filep, int flags)
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{
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PDEBUG("executed.\n");
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if (flags) {
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PERROR("Invalid flag specified.\n");
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return ME_ERRNO_INVALID_FLAGS;
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}
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return ME_ERRNO_SUCCESS;
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}
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static int me0900_di_io_single_config(me_subdevice_t *subdevice,
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struct file *filep,
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int channel,
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int single_config,
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int ref,
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int trig_chan,
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int trig_type, int trig_edge, int flags)
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{
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me0900_di_subdevice_t *instance;
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int err = ME_ERRNO_SUCCESS;
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PDEBUG("executed.\n");
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instance = (me0900_di_subdevice_t *) subdevice;
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ME_SUBDEVICE_ENTER;
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spin_lock(&instance->subdevice_lock);
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switch (flags) {
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case ME_IO_SINGLE_CONFIG_NO_FLAGS:
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case ME_IO_SINGLE_TYPE_DIO_BYTE:
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if (channel == 0) {
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if (single_config == ME_SINGLE_CONFIG_DIO_INPUT) {
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} else {
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PERROR("Invalid byte direction specified.\n");
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err = ME_ERRNO_INVALID_SINGLE_CONFIG;
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}
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} else {
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PERROR("Invalid byte number specified.\n");
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err = ME_ERRNO_INVALID_CHANNEL;
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}
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break;
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default:
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PERROR("Invalid flags specified.\n");
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err = ME_ERRNO_INVALID_FLAGS;
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}
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spin_unlock(&instance->subdevice_lock);
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ME_SUBDEVICE_EXIT;
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return err;
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}
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static int me0900_di_io_single_read(me_subdevice_t *subdevice,
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struct file *filep,
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int channel,
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int *value, int time_out, int flags)
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{
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me0900_di_subdevice_t *instance;
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int err = ME_ERRNO_SUCCESS;
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PDEBUG("executed.\n");
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instance = (me0900_di_subdevice_t *) subdevice;
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ME_SUBDEVICE_ENTER;
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spin_lock(&instance->subdevice_lock);
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switch (flags) {
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case ME_IO_SINGLE_TYPE_DIO_BIT:
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if ((channel >= 0) && (channel < 8)) {
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*value = (~inb(instance->port_reg)) & (0x1 << channel);
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} else {
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PERROR("Invalid bit number specified.\n");
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err = ME_ERRNO_INVALID_CHANNEL;
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}
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break;
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case ME_IO_SINGLE_NO_FLAGS:
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case ME_IO_SINGLE_TYPE_DIO_BYTE:
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if (channel == 0) {
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*value = ~inb(instance->port_reg);
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} else {
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PERROR("Invalid byte number specified.\n");
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err = ME_ERRNO_INVALID_CHANNEL;
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}
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break;
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default:
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PERROR("Invalid flags specified.\n");
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err = ME_ERRNO_INVALID_FLAGS;
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}
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spin_unlock(&instance->subdevice_lock);
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ME_SUBDEVICE_EXIT;
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return err;
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}
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static int me0900_di_query_number_channels(me_subdevice_t *subdevice,
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int *number)
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{
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PDEBUG("executed.\n");
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*number = 8;
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return ME_ERRNO_SUCCESS;
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}
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static int me0900_di_query_subdevice_type(me_subdevice_t *subdevice,
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int *type, int *subtype)
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{
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PDEBUG("executed.\n");
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*type = ME_TYPE_DI;
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*subtype = ME_SUBTYPE_SINGLE;
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return ME_ERRNO_SUCCESS;
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}
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static int me0900_di_query_subdevice_caps(me_subdevice_t *subdevice, int *caps)
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{
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PDEBUG("executed.\n");
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*caps = 0;
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return ME_ERRNO_SUCCESS;
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}
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me0900_di_subdevice_t *me0900_di_constructor(uint32_t reg_base,
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unsigned int di_idx)
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{
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me0900_di_subdevice_t *subdevice;
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int err;
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PDEBUG("executed.\n");
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/* Allocate memory for subdevice instance */
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subdevice = kmalloc(sizeof(me0900_di_subdevice_t), GFP_KERNEL);
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if (!subdevice) {
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PERROR("Cannot get memory for subdevice instance.\n");
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return NULL;
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}
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memset(subdevice, 0, sizeof(me0900_di_subdevice_t));
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/* Initialize subdevice base class */
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err = me_subdevice_init(&subdevice->base);
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if (err) {
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PERROR("Cannot initialize subdevice base class instance.\n");
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kfree(subdevice);
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return NULL;
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}
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// Initialize spin locks.
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spin_lock_init(&subdevice->subdevice_lock);
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/* Save the subdevice index. */
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subdevice->di_idx = di_idx;
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/* Initialize registers */
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if (di_idx == 0) {
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subdevice->ctrl_reg = reg_base + ME0900_CTRL_REG;
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subdevice->port_reg = reg_base + ME0900_PORT_A_REG;
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} else {
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subdevice->ctrl_reg = reg_base + ME0900_CTRL_REG;
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subdevice->port_reg = reg_base + ME0900_PORT_B_REG;
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}
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#ifdef MEDEBUG_DEBUG_REG
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subdevice->reg_base = reg_base;
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#endif
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/* Overload base class methods. */
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subdevice->base.me_subdevice_io_reset_subdevice =
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me0900_di_io_reset_subdevice;
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subdevice->base.me_subdevice_io_single_config =
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me0900_di_io_single_config;
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subdevice->base.me_subdevice_io_single_read = me0900_di_io_single_read;
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subdevice->base.me_subdevice_query_number_channels =
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me0900_di_query_number_channels;
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subdevice->base.me_subdevice_query_subdevice_type =
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me0900_di_query_subdevice_type;
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subdevice->base.me_subdevice_query_subdevice_caps =
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me0900_di_query_subdevice_caps;
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return subdevice;
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}
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