blob: ec9c6389752f7a2f757c22e20f70a07357dd6c11 [file] [log] [blame]
/**
* @file me8255.c
*
* @brief 8255 subdevice instance.
* @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
* @author Guenter Gebhardt
*/
/*
* 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/io.h>
#include <linux/types.h>
#include "medefines.h"
#include "meinternal.h"
#include "meerror.h"
#include "medebug.h"
#include "me8255_reg.h"
#include "me8255.h"
/*
* Defines
*/
/*
* Functions
*/
static uint8_t get_mode_from_mirror(uint32_t mirror)
{
PDEBUG("executed.\n");
if (mirror & ME8255_PORT_0_OUTPUT) {
if (mirror & ME8255_PORT_1_OUTPUT) {
if (mirror & ME8255_PORT_2_OUTPUT) {
return ME8255_MODE_OOO;
} else {
return ME8255_MODE_IOO;
}
} else {
if (mirror & ME8255_PORT_2_OUTPUT) {
return ME8255_MODE_OIO;
} else {
return ME8255_MODE_IIO;
}
}
} else {
if (mirror & ME8255_PORT_1_OUTPUT) {
if (mirror & ME8255_PORT_2_OUTPUT) {
return ME8255_MODE_OOI;
} else {
return ME8255_MODE_IOI;
}
} else {
if (mirror & ME8255_PORT_2_OUTPUT) {
return ME8255_MODE_OII;
} else {
return ME8255_MODE_III;
}
}
}
}
static int me8255_io_reset_subdevice(struct me_subdevice *subdevice,
struct file *filep, int flags)
{
me8255_subdevice_t *instance;
PDEBUG("executed.\n");
instance = (me8255_subdevice_t *) subdevice;
if (flags) {
PERROR("Invalid flag specified.\n");
return ME_ERRNO_INVALID_FLAGS;
}
ME_SUBDEVICE_ENTER;
spin_lock(&instance->subdevice_lock);
spin_lock(instance->ctrl_reg_lock);
*instance->ctrl_reg_mirror &=
~(ME8255_PORT_0_OUTPUT << instance->dio_idx);
outb(get_mode_from_mirror(*instance->ctrl_reg_mirror),
instance->ctrl_reg);
spin_unlock(instance->ctrl_reg_lock);
outb(0, instance->port_reg);
spin_unlock(&instance->subdevice_lock);
ME_SUBDEVICE_EXIT;
return ME_ERRNO_SUCCESS;
}
static int me8255_io_single_config(struct me_subdevice *subdevice,
struct file *filep,
int channel,
int single_config,
int ref,
int trig_chan,
int trig_type, int trig_edge, int flags)
{
me8255_subdevice_t *instance;
int err = ME_ERRNO_SUCCESS;
PDEBUG("executed.\n");
instance = (me8255_subdevice_t *) subdevice;
if (flags & ~ME_IO_SINGLE_CONFIG_DIO_BYTE) {
PERROR("Invalid flag specified.\n");
return ME_ERRNO_INVALID_FLAGS;
}
if (channel) {
PERROR("Invalid channel.\n");
return ME_ERRNO_INVALID_CHANNEL;
}
ME_SUBDEVICE_ENTER;
spin_lock(&instance->subdevice_lock);
if (single_config == ME_SINGLE_CONFIG_DIO_INPUT) {
spin_lock(instance->ctrl_reg_lock);
*instance->ctrl_reg_mirror &=
~(ME8255_PORT_0_OUTPUT << instance->dio_idx);
outb(get_mode_from_mirror(*instance->ctrl_reg_mirror),
instance->ctrl_reg);
spin_unlock(instance->ctrl_reg_lock);
} else if (single_config == ME_SINGLE_CONFIG_DIO_OUTPUT) {
spin_lock(instance->ctrl_reg_lock);
*instance->ctrl_reg_mirror |=
(ME8255_PORT_0_OUTPUT << instance->dio_idx);
outb(get_mode_from_mirror(*instance->ctrl_reg_mirror),
instance->ctrl_reg);
spin_unlock(instance->ctrl_reg_lock);
} else {
PERROR("Invalid port direction.\n");
err = ME_ERRNO_INVALID_SINGLE_CONFIG;
}
spin_unlock(&instance->subdevice_lock);
ME_SUBDEVICE_EXIT;
return err;
}
static int me8255_io_single_read(struct me_subdevice *subdevice,
struct file *filep,
int channel,
int *value, int time_out, int flags)
{
me8255_subdevice_t *instance;
int err = ME_ERRNO_SUCCESS;
PDEBUG("executed.\n");
instance = (me8255_subdevice_t *) subdevice;
ME_SUBDEVICE_ENTER;
spin_lock(&instance->subdevice_lock);
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.\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.\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 me8255_io_single_write(struct me_subdevice *subdevice,
struct file *filep,
int channel,
int value, int time_out, int flags)
{
me8255_subdevice_t *instance;
uint8_t byte;
int err = ME_ERRNO_SUCCESS;
PDEBUG("executed.\n");
instance = (me8255_subdevice_t *) subdevice;
ME_SUBDEVICE_ENTER;
spin_lock(&instance->subdevice_lock);
switch (flags) {
case ME_IO_SINGLE_TYPE_DIO_BIT:
if ((channel >= 0) && (channel < 8)) {
if (*instance->
ctrl_reg_mirror & (ME8255_PORT_0_OUTPUT <<
instance->dio_idx)) {
byte = inb(instance->port_reg);
if (value)
byte |= 0x1 << channel;
else
byte &= ~(0x1 << channel);
outb(byte, instance->port_reg);
} else {
PERROR("Port not in output mode.\n");
err = ME_ERRNO_PREVIOUS_CONFIG;
}
} else {
PERROR("Invalid bit number.\n");
err = ME_ERRNO_INVALID_CHANNEL;
}
break;
case ME_IO_SINGLE_NO_FLAGS:
case ME_IO_SINGLE_TYPE_DIO_BYTE:
if (channel == 0) {
if (*instance->
ctrl_reg_mirror & (ME8255_PORT_0_OUTPUT <<
instance->dio_idx)) {
outb(value, instance->port_reg);
} else {
PERROR("Port not in output mode.\n");
err = ME_ERRNO_PREVIOUS_CONFIG;
}
} else {
PERROR("Invalid byte 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 me8255_query_number_channels(struct me_subdevice *subdevice,
int *number)
{
PDEBUG("executed.\n");
*number = ME8255_NUMBER_CHANNELS;
return ME_ERRNO_SUCCESS;
}
static int me8255_query_subdevice_type(struct me_subdevice *subdevice,
int *type, int *subtype)
{
PDEBUG("executed.\n");
*type = ME_TYPE_DIO;
*subtype = ME_SUBTYPE_SINGLE;
return ME_ERRNO_SUCCESS;
}
static int me8255_query_subdevice_caps(struct me_subdevice *subdevice,
int *caps)
{
PDEBUG("executed.\n");
*caps = ME_CAPS_DIO_DIR_BYTE;
return ME_ERRNO_SUCCESS;
}
me8255_subdevice_t *me8255_constructor(uint32_t device_id,
uint32_t reg_base,
unsigned int me8255_idx,
unsigned int dio_idx,
int *ctrl_reg_mirror,
spinlock_t *ctrl_reg_lock)
{
me8255_subdevice_t *subdevice;
int err;
PDEBUG("executed.\n");
/* Allocate memory for subdevice instance */
subdevice = kmalloc(sizeof(me8255_subdevice_t), GFP_KERNEL);
if (!subdevice) {
PERROR("Cannot get memory for 8255 instance.\n");
return NULL;
}
memset(subdevice, 0, sizeof(me8255_subdevice_t));
/* Check if counter index is out of range */
if (dio_idx > 2) {
PERROR("DIO index is out of range.\n");
kfree(subdevice);
return NULL;
}
/* 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 pointer to global port settings */
subdevice->ctrl_reg_mirror = ctrl_reg_mirror;
/* Save type of Meilhaus device */
subdevice->device_id = device_id;
/* Save the indices */
subdevice->me8255_idx = me8255_idx;
subdevice->dio_idx = dio_idx;
/* Do device specific initialization */
switch (device_id) {
case PCI_DEVICE_ID_MEILHAUS_ME1400:
case PCI_DEVICE_ID_MEILHAUS_ME14E0:
case PCI_DEVICE_ID_MEILHAUS_ME140A:
case PCI_DEVICE_ID_MEILHAUS_ME14EA:
/* Check if 8255 index is out of range */
if (me8255_idx > 0) {
PERROR("8255 index is out of range.\n");
me_subdevice_deinit(&subdevice->base);
kfree(subdevice);
return NULL;
}
case PCI_DEVICE_ID_MEILHAUS_ME140B: /* Fall through */
case PCI_DEVICE_ID_MEILHAUS_ME14EB:
/* Check if 8255 index is out of range */
if (me8255_idx > 1) {
PERROR("8255 index is out of range.\n");
me_subdevice_deinit(&subdevice->base);
kfree(subdevice);
return NULL;
}
/* Get the registers */
if (me8255_idx == 0) {
subdevice->ctrl_reg = reg_base + ME1400AB_PORT_A_CTRL;
subdevice->port_reg =
reg_base + ME1400AB_PORT_A_0 + dio_idx;
} else if (me8255_idx == 1) {
subdevice->ctrl_reg = reg_base + ME1400AB_PORT_B_CTRL;
subdevice->port_reg =
reg_base + ME1400AB_PORT_B_0 + dio_idx;
}
break;
case PCI_DEVICE_ID_MEILHAUS_ME140C:
/* Check if 8255 index is out of range */
if (me8255_idx > 0) {
PERROR("8255 index is out of range.\n");
me_subdevice_deinit(&subdevice->base);
kfree(subdevice);
return NULL;
}
case PCI_DEVICE_ID_MEILHAUS_ME140D: /* Fall through */
/* Check if 8255 index is out of range */
if (me8255_idx > 1) {
PERROR("8255 index is out of range.\n");
me_subdevice_deinit(&subdevice->base);
kfree(subdevice);
return NULL;
}
/* Get the registers */
if (me8255_idx == 0) {
subdevice->ctrl_reg = reg_base + ME1400CD_PORT_A_CTRL;
subdevice->port_reg =
reg_base + ME1400CD_PORT_A_0 + dio_idx;
} else if (me8255_idx == 1) {
subdevice->ctrl_reg = reg_base + ME1400CD_PORT_B_CTRL;
subdevice->port_reg =
reg_base + ME1400CD_PORT_B_0 + dio_idx;
}
break;
default:
PERROR("Unknown device type. dev ID: 0x%04x\n", device_id);
me_subdevice_deinit(&subdevice->base);
kfree(subdevice);
return NULL;
}
/* Overload subdevice base class methods. */
subdevice->base.me_subdevice_io_reset_subdevice =
me8255_io_reset_subdevice;
subdevice->base.me_subdevice_io_single_config = me8255_io_single_config;
subdevice->base.me_subdevice_io_single_read = me8255_io_single_read;
subdevice->base.me_subdevice_io_single_write = me8255_io_single_write;
subdevice->base.me_subdevice_query_number_channels =
me8255_query_number_channels;
subdevice->base.me_subdevice_query_subdevice_type =
me8255_query_subdevice_type;
subdevice->base.me_subdevice_query_subdevice_caps =
me8255_query_subdevice_caps;
return subdevice;
}