| /** |
| * @file me6000_dio.c |
| * |
| * @brief ME-6000 digital input/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/io.h> |
| #include <linux/types.h> |
| |
| #include "medefines.h" |
| #include "meinternal.h" |
| #include "meerror.h" |
| |
| #include "medebug.h" |
| #include "me6000_dio_reg.h" |
| #include "me6000_dio.h" |
| |
| /* |
| * Defines |
| */ |
| |
| /* |
| * Functions |
| */ |
| |
| static int me6000_dio_io_reset_subdevice(struct me_subdevice *subdevice, |
| struct file *filep, int flags) |
| { |
| me6000_dio_subdevice_t *instance; |
| uint8_t mode; |
| |
| PDEBUG("executed.\n"); |
| |
| instance = (me6000_dio_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); |
| mode = inb(instance->ctrl_reg); |
| mode &= ~(0x3 << (instance->dio_idx * 2)); |
| outb(mode, instance->ctrl_reg); |
| PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| instance->ctrl_reg - instance->reg_base, mode); |
| spin_unlock(instance->ctrl_reg_lock); |
| |
| outb(0x00, instance->port_reg); |
| PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, |
| instance->ctrl_reg - instance->reg_base, 0x00); |
| spin_unlock(&instance->subdevice_lock); |
| |
| ME_SUBDEVICE_EXIT; |
| |
| return ME_ERRNO_SUCCESS; |
| } |
| |
| static int me6000_dio_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) |
| { |
| me6000_dio_subdevice_t *instance; |
| int err = ME_ERRNO_SUCCESS; |
| uint8_t mode; |
| int size = |
| flags & (ME_IO_SINGLE_CONFIG_DIO_BIT | ME_IO_SINGLE_CONFIG_DIO_BYTE |
| | ME_IO_SINGLE_CONFIG_DIO_WORD | |
| ME_IO_SINGLE_CONFIG_DIO_DWORD); |
| |
| PDEBUG("executed.\n"); |
| |
| instance = (me6000_dio_subdevice_t *) subdevice; |
| |
| ME_SUBDEVICE_ENTER spin_lock(&instance->subdevice_lock); |
| spin_lock(instance->ctrl_reg_lock); |
| mode = inb(instance->ctrl_reg); |
| switch (size) { |
| case ME_IO_SINGLE_CONFIG_NO_FLAGS: |
| case ME_IO_SINGLE_CONFIG_DIO_BYTE: |
| if (channel == 0) { |
| if (single_config == ME_SINGLE_CONFIG_DIO_INPUT) { |
| mode &= |
| ~((ME6000_DIO_CTRL_BIT_MODE_0 | |
| ME6000_DIO_CTRL_BIT_MODE_1) << |
| (instance->dio_idx * 2)); |
| } else if (single_config == ME_SINGLE_CONFIG_DIO_OUTPUT) { |
| mode &= |
| ~((ME6000_DIO_CTRL_BIT_MODE_0 | |
| ME6000_DIO_CTRL_BIT_MODE_1) << |
| (instance->dio_idx * 2)); |
| mode |= |
| ME6000_DIO_CTRL_BIT_MODE_0 << (instance-> |
| dio_idx * 2); |
| } 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.\n"); |
| err = ME_ERRNO_INVALID_FLAGS; |
| } |
| |
| if (!err) { |
| outb(mode, instance->ctrl_reg); |
| PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", |
| instance->reg_base, |
| instance->ctrl_reg - instance->reg_base, mode); |
| } |
| spin_unlock(instance->ctrl_reg_lock); |
| spin_unlock(&instance->subdevice_lock); |
| |
| ME_SUBDEVICE_EXIT; |
| |
| return err; |
| } |
| |
| static int me6000_dio_io_single_read(me_subdevice_t *subdevice, |
| struct file *filep, |
| int channel, |
| int *value, int time_out, int flags) |
| { |
| me6000_dio_subdevice_t *instance; |
| int err = ME_ERRNO_SUCCESS; |
| uint8_t mode; |
| |
| PDEBUG("executed.\n"); |
| |
| instance = (me6000_dio_subdevice_t *) subdevice; |
| |
| ME_SUBDEVICE_ENTER spin_lock(&instance->subdevice_lock); |
| spin_lock(instance->ctrl_reg_lock); |
| switch (flags) { |
| case ME_IO_SINGLE_TYPE_DIO_BIT: |
| if ((channel >= 0) && (channel < 8)) { |
| mode = |
| inb(instance-> |
| ctrl_reg) & ((ME6000_DIO_CTRL_BIT_MODE_0 | |
| ME6000_DIO_CTRL_BIT_MODE_1) << |
| (instance->dio_idx * 2)); |
| if ((mode == |
| (ME6000_DIO_CTRL_BIT_MODE_0 << |
| (instance->dio_idx * 2))) || !mode) { |
| *value = |
| inb(instance->port_reg) & (0x1 << channel); |
| } else { |
| PERROR("Port not in output or input mode.\n"); |
| err = ME_ERRNO_PREVIOUS_CONFIG; |
| } |
| } 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) { |
| mode = |
| inb(instance-> |
| ctrl_reg) & ((ME6000_DIO_CTRL_BIT_MODE_0 | |
| ME6000_DIO_CTRL_BIT_MODE_1) << |
| (instance->dio_idx * 2)); |
| if ((mode == |
| (ME6000_DIO_CTRL_BIT_MODE_0 << |
| (instance->dio_idx * 2))) || !mode) { |
| *value = inb(instance->port_reg) & 0x00FF; |
| } else { |
| PERROR("Port not in output or input mode.\n"); |
| err = ME_ERRNO_PREVIOUS_CONFIG; |
| } |
| } 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(instance->ctrl_reg_lock); |
| spin_unlock(&instance->subdevice_lock); |
| |
| ME_SUBDEVICE_EXIT; |
| |
| return err; |
| } |
| |
| static int me6000_dio_io_single_write(me_subdevice_t *subdevice, |
| struct file *filep, |
| int channel, |
| int value, int time_out, int flags) |
| { |
| me6000_dio_subdevice_t *instance; |
| int err = ME_ERRNO_SUCCESS; |
| uint8_t mode; |
| uint8_t byte; |
| |
| PDEBUG("executed.\n"); |
| |
| instance = (me6000_dio_subdevice_t *) subdevice; |
| |
| ME_SUBDEVICE_ENTER spin_lock(&instance->subdevice_lock); |
| spin_lock(instance->ctrl_reg_lock); |
| switch (flags) { |
| case ME_IO_SINGLE_TYPE_DIO_BIT: |
| if ((channel >= 0) && (channel < 8)) { |
| mode = |
| inb(instance-> |
| ctrl_reg) & ((ME6000_DIO_CTRL_BIT_MODE_0 | |
| ME6000_DIO_CTRL_BIT_MODE_1) << |
| (instance->dio_idx * 2)); |
| |
| if (mode == |
| (ME6000_DIO_CTRL_BIT_MODE_0 << |
| (instance->dio_idx * 2))) { |
| byte = inb(instance->port_reg) & 0x00FF; |
| |
| if (value) |
| byte |= 0x1 << channel; |
| else |
| byte &= ~(0x1 << channel); |
| |
| outb(byte, instance->port_reg); |
| } else { |
| PERROR("Port not in output or input mode.\n"); |
| err = ME_ERRNO_PREVIOUS_CONFIG; |
| } |
| } 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) { |
| mode = |
| inb(instance-> |
| ctrl_reg) & ((ME6000_DIO_CTRL_BIT_MODE_0 | |
| ME6000_DIO_CTRL_BIT_MODE_1) << |
| (instance->dio_idx * 2)); |
| |
| if (mode == |
| (ME6000_DIO_CTRL_BIT_MODE_0 << |
| (instance->dio_idx * 2))) { |
| outb(value, instance->port_reg); |
| } else { |
| PERROR("Port not in output or input mode.\n"); |
| err = ME_ERRNO_PREVIOUS_CONFIG; |
| } |
| } 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(instance->ctrl_reg_lock); |
| spin_unlock(&instance->subdevice_lock); |
| |
| ME_SUBDEVICE_EXIT; |
| |
| return err; |
| } |
| |
| static int me6000_dio_query_number_channels(me_subdevice_t *subdevice, |
| int *number) |
| { |
| PDEBUG("executed.\n"); |
| *number = 8; |
| return ME_ERRNO_SUCCESS; |
| } |
| |
| static int me6000_dio_query_subdevice_type(me_subdevice_t *subdevice, |
| int *type, int *subtype) |
| { |
| PDEBUG("executed.\n"); |
| *type = ME_TYPE_DIO; |
| *subtype = ME_SUBTYPE_SINGLE; |
| return ME_ERRNO_SUCCESS; |
| } |
| |
| static int me6000_dio_query_subdevice_caps(me_subdevice_t *subdevice, |
| int *caps) |
| { |
| PDEBUG("executed.\n"); |
| *caps = ME_CAPS_DIO_DIR_BYTE; |
| return ME_ERRNO_SUCCESS; |
| } |
| |
| me6000_dio_subdevice_t *me6000_dio_constructor(uint32_t reg_base, |
| unsigned int dio_idx, |
| spinlock_t *ctrl_reg_lock) |
| { |
| me6000_dio_subdevice_t *subdevice; |
| int err; |
| |
| PDEBUG("executed.\n"); |
| |
| /* Allocate memory for subdevice instance */ |
| subdevice = kmalloc(sizeof(me6000_dio_subdevice_t), GFP_KERNEL); |
| |
| if (!subdevice) { |
| PERROR("Cannot get memory for subdevice instance.\n"); |
| return NULL; |
| } |
| |
| memset(subdevice, 0, sizeof(me6000_dio_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; |
| } |
| |
| /* Set the subdevice ports */ |
| subdevice->ctrl_reg = reg_base + ME6000_DIO_CTRL_REG; |
| switch (dio_idx) { |
| case 0: |
| subdevice->port_reg = reg_base + ME6000_DIO_PORT_0_REG; |
| break; |
| case 1: |
| subdevice->port_reg = reg_base + ME6000_DIO_PORT_1_REG; |
| break; |
| default: |
| err = ME_ERRNO_INVALID_SUBDEVICE; |
| } |
| |
| 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 digital i/o index */ |
| subdevice->dio_idx = dio_idx; |
| |
| #ifdef MEDEBUG_DEBUG_REG |
| subdevice->reg_base = reg_base; |
| #endif |
| |
| /* Overload base class methods. */ |
| subdevice->base.me_subdevice_io_reset_subdevice = |
| me6000_dio_io_reset_subdevice; |
| subdevice->base.me_subdevice_io_single_config = |
| me6000_dio_io_single_config; |
| subdevice->base.me_subdevice_io_single_read = me6000_dio_io_single_read; |
| subdevice->base.me_subdevice_io_single_write = |
| me6000_dio_io_single_write; |
| subdevice->base.me_subdevice_query_number_channels = |
| me6000_dio_query_number_channels; |
| subdevice->base.me_subdevice_query_subdevice_type = |
| me6000_dio_query_subdevice_type; |
| subdevice->base.me_subdevice_query_subdevice_caps = |
| me6000_dio_query_subdevice_caps; |
| |
| return subdevice; |
| } |
