--- /dev/null
+/**
+ * @file mesubdevice.h
+ *
+ * @brief Provides the subdevice base class.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ */
+
+#ifndef _MESUBDEVICE_H_
+#define _MESUBDEVICE_H_
+
+#include <linux/list.h>
+
+#include "metypes.h"
+#include "meioctl.h"
+#include "meslock.h"
+
+# include <linux/workqueue.h>
+
+#ifdef __KERNEL__
+
+/**
+ * @brief Macro used to enter a subdevice.
+ */
+#define ME_SUBDEVICE_ENTER \
+{ \
+ int err; \
+ err = me_slock_enter(&instance->base.lock, filep); \
+ if(err){ \
+ PERROR("Cannot enter subdevice.\n"); \
+ return err; \
+ } \
+}
+
+/**
+ * @brief Macro used to exit a subdevice.
+ */
+#define ME_SUBDEVICE_EXIT \
+{\
+ int err; \
+ err = me_slock_exit(&instance->base.lock, filep); \
+ if(err){ \
+ PERROR("Cannot exit subdevice.\n"); \
+ return err; \
+ } \
+}
+
+/**
+ * @brief The subdevice base class.
+ */
+typedef struct me_subdevice {
+ /* Attributes */
+ struct list_head list; /**< Enables the subdevice to be added to a dynamic list. */
+ me_slock_t lock; /**< Used by user application in order to lock the subdevice for exclusive usage. */
+
+ /* Methods */
+ int (*me_subdevice_io_irq_start) (struct me_subdevice * subdevice,
+ struct file * filep,
+ int channel,
+ int irq_source,
+ int irq_edge, int irq_arg, int flags);
+
+ int (*me_subdevice_io_irq_wait) (struct me_subdevice * subdevice,
+ struct file * filep,
+ int channel,
+ int *irq_count,
+ int *value, int time_out, int flags);
+
+ int (*me_subdevice_io_irq_stop) (struct me_subdevice * subdevice,
+ struct file * filep,
+ int channel, int flags);
+
+ int (*me_subdevice_io_reset_subdevice) (struct me_subdevice * subdevice,
+ struct file * filep, int flags);
+
+ int (*me_subdevice_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);
+
+ int (*me_subdevice_io_single_read) (struct me_subdevice * subdevice,
+ struct file * filep,
+ int channel,
+ int *value,
+ int time_out, int flags);
+
+ int (*me_subdevice_io_single_write) (struct me_subdevice * subdevice,
+ struct file * filep,
+ int channel,
+ int value,
+ int time_out, int flags);
+
+ int (*me_subdevice_io_stream_config) (struct me_subdevice * subdevice,
+ struct file * filep,
+ meIOStreamConfig_t * config_list,
+ int count,
+ meIOStreamTrigger_t * trigger,
+ int fifo_irq_threshold,
+ int flags);
+
+ int (*me_subdevice_io_stream_new_values) (struct me_subdevice *
+ subdevice,
+ struct file * filep,
+ int time_out, int *count,
+ int flags);
+
+ int (*me_subdevice_io_stream_read) (struct me_subdevice * subdevice,
+ struct file * filep,
+ int read_mode,
+ int *values, int *count, int flags);
+
+ int (*me_subdevice_io_stream_start) (struct me_subdevice * subdevice,
+ struct file * filep,
+ int start_mode,
+ int time_out, int flags);
+
+ int (*me_subdevice_io_stream_status) (struct me_subdevice * subdevice,
+ struct file * filep,
+ int wait,
+ int *status,
+ int *count, int flags);
+
+ int (*me_subdevice_io_stream_stop) (struct me_subdevice * subdevice,
+ struct file * filep,
+ int stop_mode, int flags);
+
+ int (*me_subdevice_io_stream_write) (struct me_subdevice * subdevice,
+ struct file * filep,
+ int write_mode,
+ int *values,
+ int *count, int flags);
+
+ int (*me_subdevice_lock_subdevice) (struct me_subdevice * subdevice,
+ struct file * filep,
+ int lock, int flags);
+
+ int (*me_subdevice_query_number_channels) (struct me_subdevice *
+ subdevice, int *number);
+
+ int (*me_subdevice_query_number_ranges) (struct me_subdevice *
+ subdevice, int unit,
+ int *count);
+
+ int (*me_subdevice_query_range_by_min_max) (struct me_subdevice *
+ subdevice, int unit,
+ int *min, int *max,
+ int *maxdata, int *range);
+
+ int (*me_subdevice_query_range_info) (struct me_subdevice * subdevice,
+ int range,
+ int *unit,
+ int *min, int *max, int *maxdata);
+
+ int (*me_subdevice_query_subdevice_type) (struct me_subdevice *
+ subdevice, int *type,
+ int *subtype);
+
+ int (*me_subdevice_query_subdevice_caps) (struct me_subdevice *
+ subdevice, int *caps);
+
+ int (*me_subdevice_query_subdevice_caps_args) (struct me_subdevice *
+ subdevice, int cap,
+ int *args, int count);
+
+ int (*me_subdevice_query_timer) (struct me_subdevice * subdevice,
+ int timer,
+ int *base_frequency,
+ long long *min_ticks,
+ long long *max_ticks);
+
+ int (*me_subdevice_config_load) (struct me_subdevice * subdevice,
+ me_cfg_device_entry_t * config);
+
+ void (*me_subdevice_destructor) (struct me_subdevice * subdevice);
+} me_subdevice_t;
+
+/**
+ * @brief Initializes a subdevice structure.
+ *
+ * @param subdevice The subdevice structure to initialize.
+ * @return 0 on success.
+ */
+int me_subdevice_init(me_subdevice_t * subdevice);
+
+/**
+ * @brief Deinitializes a subdevice structure.
+ *
+ * @param subdevice The subdevice structure to initialize.
+ */
+void me_subdevice_deinit(me_subdevice_t * subdevice);
+
+#endif
+#endif
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