diff options
Diffstat (limited to 'drivers/staging/meilhaus/me1000_dio.c')
-rw-r--r-- | drivers/staging/meilhaus/me1000_dio.c | 438 |
1 files changed, 438 insertions, 0 deletions
diff --git a/drivers/staging/meilhaus/me1000_dio.c b/drivers/staging/meilhaus/me1000_dio.c new file mode 100644 index 00000000000..87605a9108a --- /dev/null +++ b/drivers/staging/meilhaus/me1000_dio.c @@ -0,0 +1,438 @@ +/** + * @file me1000_dio.c + * + * @brief ME-1000 DIO subdevice instance. + * @note Copyright (C) 2006 Meilhaus Electronic GmbH (support@meilhaus.de) + * @author Guenter Gebhardt + * @author Krzysztof Gantzke (k.gantzke@meilhaus.de) + */ + +/* + * Copyright (C) 2006 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 <asm/io.h> +#include <linux/types.h> + +#include "medefines.h" +#include "meinternal.h" +#include "meerror.h" +#include "medebug.h" + +#include "me1000_dio_reg.h" +#include "me1000_dio.h" + +/* + * Defines + */ +#define ME1000_DIO_MAGIC_NUMBER 0x1000 /**< The magic number of the class structure. */ + +/* + * Functions + */ + +static int me1000_dio_io_reset_subdevice(struct me_subdevice *subdevice, + struct file *filep, int flags) +{ + me1000_dio_subdevice_t *instance; + uint32_t tmp; + + PDEBUG("executed.\n"); + + instance = (me1000_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); + tmp = inl(instance->ctrl_reg); + tmp &= ~(0x1 << instance->dio_idx); + outl(tmp, instance->ctrl_reg); + PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, + instance->ctrl_reg - instance->reg_base, tmp); + spin_unlock(instance->ctrl_reg_lock); + + outl(0x00000000, instance->port_reg); + PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, + instance->ctrl_reg - instance->reg_base, 0); + spin_unlock(&instance->subdevice_lock); + + ME_SUBDEVICE_EXIT; + + return ME_ERRNO_SUCCESS; +} + +static int me1000_dio_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) +{ + me1000_dio_subdevice_t *instance; + int err = ME_ERRNO_SUCCESS; + int ctrl; + 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 = (me1000_dio_subdevice_t *) subdevice; + + ME_SUBDEVICE_ENTER; + + spin_lock(&instance->subdevice_lock); + spin_lock(instance->ctrl_reg_lock); + ctrl = inl(instance->ctrl_reg); + + switch (size) { + case ME_IO_SINGLE_CONFIG_NO_FLAGS: + case ME_IO_SINGLE_CONFIG_DIO_DWORD: + if (channel == 0) { + if (single_config == ME_SINGLE_CONFIG_DIO_INPUT) { + ctrl &= ~(0x1 << instance->dio_idx); + } else if (single_config == ME_SINGLE_CONFIG_DIO_OUTPUT) { + ctrl |= 0x1 << instance->dio_idx; + } else { + PERROR("Invalid port direction.\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) { + outl(ctrl, instance->ctrl_reg); + PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", + instance->reg_base, + instance->ctrl_reg - instance->reg_base, ctrl); + } + spin_unlock(instance->ctrl_reg_lock); + spin_unlock(&instance->subdevice_lock); + + ME_SUBDEVICE_EXIT; + + return err; +} + +static int me1000_dio_io_single_read(struct me_subdevice *subdevice, + struct file *filep, + int channel, + int *value, int time_out, int flags) +{ + me1000_dio_subdevice_t *instance; + int err = ME_ERRNO_SUCCESS; + + PDEBUG("executed.\n"); + + instance = (me1000_dio_subdevice_t *) subdevice; + + ME_SUBDEVICE_ENTER; + + spin_lock(&instance->subdevice_lock); + switch (flags) { + case ME_IO_SINGLE_TYPE_DIO_BIT: + if ((channel >= 0) && (channel < 32)) { + *value = inl(instance->port_reg) & (0x1 << channel); + } else { + PERROR("Invalid bit number.\n"); + err = ME_ERRNO_INVALID_CHANNEL; + } + break; + + case ME_IO_SINGLE_TYPE_DIO_BYTE: + if ((channel >= 0) && (channel < 4)) { + *value = + (inl(instance->port_reg) >> (channel * 8)) & 0xFF; + } else { + PERROR("Invalid byte number.\n"); + err = ME_ERRNO_INVALID_CHANNEL; + } + break; + + case ME_IO_SINGLE_TYPE_DIO_WORD: + if ((channel >= 0) && (channel < 2)) { + *value = + (inl(instance->port_reg) >> (channel * 16)) & + 0xFFFF; + } else { + PERROR("Invalid word number.\n"); + err = ME_ERRNO_INVALID_CHANNEL; + } + break; + + case ME_IO_SINGLE_NO_FLAGS: + case ME_IO_SINGLE_TYPE_DIO_DWORD: + if (channel == 0) { + *value = inl(instance->port_reg); + } else { + PERROR("Invalid dword 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 me1000_dio_io_single_write(struct me_subdevice *subdevice, + struct file *filep, + int channel, + int value, int time_out, int flags) +{ + me1000_dio_subdevice_t *instance; + int err = ME_ERRNO_SUCCESS; + uint32_t config; + uint32_t state; + + PDEBUG("executed.\n"); + + instance = (me1000_dio_subdevice_t *) subdevice; + + ME_SUBDEVICE_ENTER spin_lock(&instance->subdevice_lock); + spin_lock(instance->ctrl_reg_lock); + config = inl(instance->ctrl_reg) & (0x1 << instance->dio_idx); + switch (flags) { + case ME_IO_SINGLE_TYPE_DIO_BIT: + if ((channel >= 0) && (channel < 32)) { + if (config) { + state = inl(instance->port_reg); + state = + value ? (state | (0x1 << channel)) : (state + & + ~(0x1 + << + channel)); + outl(state, instance->port_reg); + PDEBUG_REG("port_reg outl(0x%lX+0x%lX)=0x%x\n", + instance->reg_base, + instance->port_reg - + instance->reg_base, state); + } else { + PERROR("Port is 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_TYPE_DIO_BYTE: + if ((channel >= 0) && (channel < 4)) { + if (config) { + state = inl(instance->port_reg); + state &= ~(0xFF << (channel * 8)); + state |= (value & 0xFF) << (channel * 8); + outl(state, instance->port_reg); + PDEBUG_REG("port_reg outl(0x%lX+0x%lX)=0x%x\n", + instance->reg_base, + instance->port_reg - + instance->reg_base, state); + } else { + PERROR("Port is not in output mode.\n"); + err = ME_ERRNO_PREVIOUS_CONFIG; + } + } else { + PERROR("Invalid byte number.\n"); + err = ME_ERRNO_INVALID_CHANNEL; + } + break; + + case ME_IO_SINGLE_TYPE_DIO_WORD: + if ((channel >= 0) && (channel < 2)) { + if (config) { + state = inl(instance->port_reg); + state &= ~(0xFFFF << (channel * 16)); + state |= (value & 0xFFFF) << (channel * 16); + outl(state, instance->port_reg); + PDEBUG_REG("port_reg outl(0x%lX+0x%lX)=0x%x\n", + instance->reg_base, + instance->port_reg - + instance->reg_base, state); + } else { + PERROR("Port is not in output mode.\n"); + err = ME_ERRNO_PREVIOUS_CONFIG; + } + } else { + PERROR("Invalid word number.\n"); + err = ME_ERRNO_INVALID_CHANNEL; + } + break; + + case ME_IO_SINGLE_NO_FLAGS: + case ME_IO_SINGLE_TYPE_DIO_DWORD: + if (channel == 0) { + if (config) { + outl(value, instance->port_reg); + PDEBUG_REG("port_reg outl(0x%lX+0x%lX)=0x%x\n", + instance->reg_base, + instance->port_reg - + instance->reg_base, value); + } else { + PERROR("Port is not in output mode.\n"); + err = ME_ERRNO_PREVIOUS_CONFIG; + } + } else { + PERROR("Invalid dword number.\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 me1000_dio_query_number_channels(struct me_subdevice *subdevice, + int *number) +{ + PDEBUG("executed.\n"); + *number = ME1000_DIO_NUMBER_CHANNELS; + return ME_ERRNO_SUCCESS; +} + +static int me1000_dio_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 me1000_dio_query_subdevice_caps(struct me_subdevice *subdevice, + int *caps) +{ + me1000_dio_subdevice_t *instance; + + PDEBUG("executed.\n"); + + instance = (me1000_dio_subdevice_t *) subdevice; + + *caps = ME_CAPS_DIO_DIR_DWORD; + + return ME_ERRNO_SUCCESS; +} + +me1000_dio_subdevice_t *me1000_dio_constructor(uint32_t reg_base, + unsigned int dio_idx, + spinlock_t * ctrl_reg_lock) +{ + me1000_dio_subdevice_t *subdevice; + int err; + + PDEBUG("executed.\n"); + + /* Allocate memory for subdevice instance */ + subdevice = kmalloc(sizeof(me1000_dio_subdevice_t), GFP_KERNEL); + + if (!subdevice) { + PERROR("Cannot get memory for ME-1000 DIO instance.\n"); + return NULL; + } + + memset(subdevice, 0, sizeof(me1000_dio_subdevice_t)); + + /* Check if counter index is out of range */ + + if (dio_idx >= ME1000_DIO_NUMBER_PORTS) { + 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 DIO index */ + subdevice->dio_idx = dio_idx; + + /* Initialize registers. */ +#ifdef MEDEBUG_DEBUG_REG + subdevice->reg_base = reg_base; +#endif + subdevice->ctrl_reg = reg_base + ME1000_PORT_MODE; + subdevice->port_reg = + reg_base + ME1000_PORT + (dio_idx * ME1000_PORT_STEP); + + /* Override base class methods. */ + subdevice->base.me_subdevice_io_reset_subdevice = + me1000_dio_io_reset_subdevice; + subdevice->base.me_subdevice_io_single_config = + me1000_dio_io_single_config; + subdevice->base.me_subdevice_io_single_read = me1000_dio_io_single_read; + subdevice->base.me_subdevice_io_single_write = + me1000_dio_io_single_write; + subdevice->base.me_subdevice_query_number_channels = + me1000_dio_query_number_channels; + subdevice->base.me_subdevice_query_subdevice_type = + me1000_dio_query_subdevice_type; + subdevice->base.me_subdevice_query_subdevice_caps = + me1000_dio_query_subdevice_caps; + + return subdevice; +} |