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>
463 lines
11 KiB
C
463 lines
11 KiB
C
/**
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* @file me8255.c
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*
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* @brief 8255 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 "medefines.h"
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#include "meinternal.h"
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#include "meerror.h"
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#include "medebug.h"
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#include "me8255_reg.h"
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#include "me8255.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 uint8_t get_mode_from_mirror(uint32_t mirror)
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{
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PDEBUG("executed.\n");
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if (mirror & ME8255_PORT_0_OUTPUT) {
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if (mirror & ME8255_PORT_1_OUTPUT) {
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if (mirror & ME8255_PORT_2_OUTPUT) {
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return ME8255_MODE_OOO;
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} else {
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return ME8255_MODE_IOO;
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}
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} else {
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if (mirror & ME8255_PORT_2_OUTPUT) {
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return ME8255_MODE_OIO;
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} else {
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return ME8255_MODE_IIO;
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}
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}
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} else {
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if (mirror & ME8255_PORT_1_OUTPUT) {
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if (mirror & ME8255_PORT_2_OUTPUT) {
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return ME8255_MODE_OOI;
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} else {
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return ME8255_MODE_IOI;
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}
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} else {
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if (mirror & ME8255_PORT_2_OUTPUT) {
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return ME8255_MODE_OII;
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} else {
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return ME8255_MODE_III;
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}
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}
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}
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}
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static int me8255_io_reset_subdevice(struct me_subdevice *subdevice,
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struct file *filep, int flags)
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{
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me8255_subdevice_t *instance;
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PDEBUG("executed.\n");
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instance = (me8255_subdevice_t *) subdevice;
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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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ME_SUBDEVICE_ENTER;
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spin_lock(&instance->subdevice_lock);
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spin_lock(instance->ctrl_reg_lock);
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*instance->ctrl_reg_mirror &=
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~(ME8255_PORT_0_OUTPUT << instance->dio_idx);
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outb(get_mode_from_mirror(*instance->ctrl_reg_mirror),
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instance->ctrl_reg);
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spin_unlock(instance->ctrl_reg_lock);
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outb(0, instance->port_reg);
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spin_unlock(&instance->subdevice_lock);
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ME_SUBDEVICE_EXIT;
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return ME_ERRNO_SUCCESS;
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}
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static int me8255_io_single_config(struct me_subdevice *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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me8255_subdevice_t *instance;
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int err = ME_ERRNO_SUCCESS;
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PDEBUG("executed.\n");
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instance = (me8255_subdevice_t *) subdevice;
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if (flags & ~ME_IO_SINGLE_CONFIG_DIO_BYTE) {
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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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if (channel) {
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PERROR("Invalid channel.\n");
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return ME_ERRNO_INVALID_CHANNEL;
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}
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ME_SUBDEVICE_ENTER;
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spin_lock(&instance->subdevice_lock);
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if (single_config == ME_SINGLE_CONFIG_DIO_INPUT) {
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spin_lock(instance->ctrl_reg_lock);
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*instance->ctrl_reg_mirror &=
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~(ME8255_PORT_0_OUTPUT << instance->dio_idx);
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outb(get_mode_from_mirror(*instance->ctrl_reg_mirror),
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instance->ctrl_reg);
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spin_unlock(instance->ctrl_reg_lock);
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} else if (single_config == ME_SINGLE_CONFIG_DIO_OUTPUT) {
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spin_lock(instance->ctrl_reg_lock);
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*instance->ctrl_reg_mirror |=
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(ME8255_PORT_0_OUTPUT << instance->dio_idx);
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outb(get_mode_from_mirror(*instance->ctrl_reg_mirror),
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instance->ctrl_reg);
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spin_unlock(instance->ctrl_reg_lock);
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} else {
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PERROR("Invalid port direction.\n");
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err = ME_ERRNO_INVALID_SINGLE_CONFIG;
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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 me8255_io_single_read(struct me_subdevice *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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me8255_subdevice_t *instance;
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int err = ME_ERRNO_SUCCESS;
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PDEBUG("executed.\n");
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instance = (me8255_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.\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.\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 me8255_io_single_write(struct me_subdevice *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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me8255_subdevice_t *instance;
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uint8_t byte;
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int err = ME_ERRNO_SUCCESS;
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PDEBUG("executed.\n");
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instance = (me8255_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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if (*instance->
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ctrl_reg_mirror & (ME8255_PORT_0_OUTPUT <<
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instance->dio_idx)) {
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byte = inb(instance->port_reg);
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if (value)
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byte |= 0x1 << channel;
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else
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byte &= ~(0x1 << channel);
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outb(byte, instance->port_reg);
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} else {
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PERROR("Port not in output mode.\n");
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err = ME_ERRNO_PREVIOUS_CONFIG;
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}
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} else {
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PERROR("Invalid bit number.\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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if (*instance->
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ctrl_reg_mirror & (ME8255_PORT_0_OUTPUT <<
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instance->dio_idx)) {
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outb(value, instance->port_reg);
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} else {
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PERROR("Port not in output mode.\n");
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err = ME_ERRNO_PREVIOUS_CONFIG;
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}
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} else {
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PERROR("Invalid byte number.\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 me8255_query_number_channels(struct me_subdevice *subdevice,
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int *number)
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{
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PDEBUG("executed.\n");
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*number = ME8255_NUMBER_CHANNELS;
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return ME_ERRNO_SUCCESS;
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}
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static int me8255_query_subdevice_type(struct me_subdevice *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_DIO;
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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 me8255_query_subdevice_caps(struct me_subdevice *subdevice,
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int *caps)
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{
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PDEBUG("executed.\n");
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*caps = ME_CAPS_DIO_DIR_BYTE;
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return ME_ERRNO_SUCCESS;
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}
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me8255_subdevice_t *me8255_constructor(uint32_t device_id,
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uint32_t reg_base,
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unsigned int me8255_idx,
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unsigned int dio_idx,
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int *ctrl_reg_mirror,
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spinlock_t *ctrl_reg_lock)
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{
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me8255_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(me8255_subdevice_t), GFP_KERNEL);
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if (!subdevice) {
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PERROR("Cannot get memory for 8255 instance.\n");
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return NULL;
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}
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memset(subdevice, 0, sizeof(me8255_subdevice_t));
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/* Check if counter index is out of range */
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if (dio_idx > 2) {
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PERROR("DIO index is out of range.\n");
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kfree(subdevice);
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return NULL;
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}
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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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subdevice->ctrl_reg_lock = ctrl_reg_lock;
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/* Save the pointer to global port settings */
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subdevice->ctrl_reg_mirror = ctrl_reg_mirror;
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/* Save type of Meilhaus device */
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subdevice->device_id = device_id;
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/* Save the indices */
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subdevice->me8255_idx = me8255_idx;
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subdevice->dio_idx = dio_idx;
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/* Do device specific initialization */
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switch (device_id) {
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case PCI_DEVICE_ID_MEILHAUS_ME1400:
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case PCI_DEVICE_ID_MEILHAUS_ME14E0:
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case PCI_DEVICE_ID_MEILHAUS_ME140A:
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case PCI_DEVICE_ID_MEILHAUS_ME14EA:
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/* Check if 8255 index is out of range */
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if (me8255_idx > 0) {
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PERROR("8255 index is out of range.\n");
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me_subdevice_deinit(&subdevice->base);
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kfree(subdevice);
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return NULL;
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}
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case PCI_DEVICE_ID_MEILHAUS_ME140B: /* Fall through */
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case PCI_DEVICE_ID_MEILHAUS_ME14EB:
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/* Check if 8255 index is out of range */
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if (me8255_idx > 1) {
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PERROR("8255 index is out of range.\n");
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me_subdevice_deinit(&subdevice->base);
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kfree(subdevice);
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return NULL;
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}
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/* Get the registers */
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if (me8255_idx == 0) {
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subdevice->ctrl_reg = reg_base + ME1400AB_PORT_A_CTRL;
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subdevice->port_reg =
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reg_base + ME1400AB_PORT_A_0 + dio_idx;
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} else if (me8255_idx == 1) {
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subdevice->ctrl_reg = reg_base + ME1400AB_PORT_B_CTRL;
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subdevice->port_reg =
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reg_base + ME1400AB_PORT_B_0 + dio_idx;
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}
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break;
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case PCI_DEVICE_ID_MEILHAUS_ME140C:
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/* Check if 8255 index is out of range */
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if (me8255_idx > 0) {
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PERROR("8255 index is out of range.\n");
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me_subdevice_deinit(&subdevice->base);
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kfree(subdevice);
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return NULL;
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}
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case PCI_DEVICE_ID_MEILHAUS_ME140D: /* Fall through */
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/* Check if 8255 index is out of range */
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if (me8255_idx > 1) {
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PERROR("8255 index is out of range.\n");
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me_subdevice_deinit(&subdevice->base);
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kfree(subdevice);
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return NULL;
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}
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/* Get the registers */
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if (me8255_idx == 0) {
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subdevice->ctrl_reg = reg_base + ME1400CD_PORT_A_CTRL;
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subdevice->port_reg =
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reg_base + ME1400CD_PORT_A_0 + dio_idx;
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} else if (me8255_idx == 1) {
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subdevice->ctrl_reg = reg_base + ME1400CD_PORT_B_CTRL;
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subdevice->port_reg =
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reg_base + ME1400CD_PORT_B_0 + dio_idx;
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}
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break;
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default:
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PERROR("Unknown device type. dev ID: 0x%04x\n", device_id);
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me_subdevice_deinit(&subdevice->base);
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kfree(subdevice);
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return NULL;
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}
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/* Overload subdevice base class methods. */
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subdevice->base.me_subdevice_io_reset_subdevice =
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me8255_io_reset_subdevice;
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subdevice->base.me_subdevice_io_single_config = me8255_io_single_config;
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subdevice->base.me_subdevice_io_single_read = me8255_io_single_read;
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subdevice->base.me_subdevice_io_single_write = me8255_io_single_write;
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subdevice->base.me_subdevice_query_number_channels =
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me8255_query_number_channels;
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subdevice->base.me_subdevice_query_subdevice_type =
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me8255_query_subdevice_type;
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subdevice->base.me_subdevice_query_subdevice_caps =
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me8255_query_subdevice_caps;
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return subdevice;
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}
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