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-rw-r--r--drivers/staging/meilhaus/me1000_dio.c438
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 000000000000..87605a9108ae
--- /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;
+}