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   1 /**
   2  * @file mesubdevice.h
   3  *
   4  * @brief Provides the subdevice base class.
   5  * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
   6  * @author Guenter Gebhardt
   7  */
   8
   9 #ifndef _MESUBDEVICE_H_
  10 #define _MESUBDEVICE_H_
  11
  12 #include <linux/list.h>
  13
  14 #include "metypes.h"
  15 #include "meioctl.h"
  16 #include "meslock.h"
  17
  18 # include <linux/workqueue.h>
  19
  20 #ifdef __KERNEL__
  21
  22 /**
  23  * @brief Macro used to enter a subdevice.
  24  */
  25 #define ME_SUBDEVICE_ENTER      \
  26 { \
  27         int err; \
  28         err = me_slock_enter(&instance->base.lock, filep); \
  29         if(err){ \
  30                 PERROR("Cannot enter subdevice.\n"); \
  31                 return err; \
  32         } \
  33 }
  34
  35 /**
  36  * @brief Macro used to exit a subdevice.
  37  */
  38 #define ME_SUBDEVICE_EXIT       \
  39 {\
  40         int err; \
  41         err = me_slock_exit(&instance->base.lock, filep); \
  42         if(err){ \
  43                 PERROR("Cannot exit subdevice.\n"); \
  44                 return err; \
  45         } \
  46 }
  47
  48 /**
  49  * @brief The subdevice base class.
  50  */
  51 typedef struct me_subdevice {
  52         /* Attributes */
  53         struct list_head list;          /**< Enables the subdevice to be added to a dynamic list. */
  54         me_slock_t lock;                /**< Used by user application in order to lock the subdevice for exclusive usage. */
  55
  56         /* Methods */
  57         int (*me_subdevice_io_irq_start) (struct me_subdevice * subdevice,
  58                                           struct file * filep,
  59                                           int channel,
  60                                           int irq_source,
  61                                           int irq_edge, int irq_arg, int flags);
  62
  63         int (*me_subdevice_io_irq_wait) (struct me_subdevice * subdevice,
  64                                          struct file * filep,
  65                                          int channel,
  66                                          int *irq_count,
  67                                          int *value, int time_out, int flags);
  68
  69         int (*me_subdevice_io_irq_stop) (struct me_subdevice * subdevice,
  70                                          struct file * filep,
  71                                          int channel, int flags);
  72
  73         int (*me_subdevice_io_reset_subdevice) (struct me_subdevice * subdevice,
  74                                                 struct file * filep, int flags);
  75
  76         int (*me_subdevice_io_single_config) (struct me_subdevice * subdevice,
  77                                               struct file * filep,
  78                                               int channel,
  79                                               int single_config,
  80                                               int ref,
  81                                               int trig_chan,
  82                                               int trig_type,
  83                                               int trig_edge, int flags);
  84
  85         int (*me_subdevice_io_single_read) (struct me_subdevice * subdevice,
  86                                             struct file * filep,
  87                                             int channel,
  88                                             int *value,
  89                                             int time_out, int flags);
  90
  91         int (*me_subdevice_io_single_write) (struct me_subdevice * subdevice,
  92                                              struct file * filep,
  93                                              int channel,
  94                                              int value,
  95                                              int time_out, int flags);
  96
  97         int (*me_subdevice_io_stream_config) (struct me_subdevice * subdevice,
  98                                               struct file * filep,
  99                                               meIOStreamConfig_t * config_list,
 100                                               int count,
 101                                               meIOStreamTrigger_t * trigger,
 102                                               int fifo_irq_threshold,
 103                                               int flags);
 104
 105         int (*me_subdevice_io_stream_new_values) (struct me_subdevice *
 106                                                   subdevice,
 107                                                   struct file * filep,
 108                                                   int time_out, int *count,
 109                                                   int flags);
 110
 111         int (*me_subdevice_io_stream_read) (struct me_subdevice * subdevice,
 112                                             struct file * filep,
 113                                             int read_mode,
 114                                             int *values, int *count, int flags);
 115
 116         int (*me_subdevice_io_stream_start) (struct me_subdevice * subdevice,
 117                                              struct file * filep,
 118                                              int start_mode,
 119                                              int time_out, int flags);
 120
 121         int (*me_subdevice_io_stream_status) (struct me_subdevice * subdevice,
 122                                               struct file * filep,
 123                                               int wait,
 124                                               int *status,
 125                                               int *count, int flags);
 126
 127         int (*me_subdevice_io_stream_stop) (struct me_subdevice * subdevice,
 128                                             struct file * filep,
 129                                             int stop_mode, int flags);
 130
 131         int (*me_subdevice_io_stream_write) (struct me_subdevice * subdevice,
 132                                              struct file * filep,
 133                                              int write_mode,
 134                                              int *values,
 135                                              int *count, int flags);
 136
 137         int (*me_subdevice_lock_subdevice) (struct me_subdevice * subdevice,
 138                                             struct file * filep,
 139                                             int lock, int flags);
 140
 141         int (*me_subdevice_query_number_channels) (struct me_subdevice *
 142                                                    subdevice, int *number);
 143
 144         int (*me_subdevice_query_number_ranges) (struct me_subdevice *
 145                                                  subdevice, int unit,
 146                                                  int *count);
 147
 148         int (*me_subdevice_query_range_by_min_max) (struct me_subdevice *
 149                                                     subdevice, int unit,
 150                                                     int *min, int *max,
 151                                                     int *maxdata, int *range);
 152
 153         int (*me_subdevice_query_range_info) (struct me_subdevice * subdevice,
 154                                               int range,
 155                                               int *unit,
 156                                               int *min, int *max, int *maxdata);
 157
 158         int (*me_subdevice_query_subdevice_type) (struct me_subdevice *
 159                                                   subdevice, int *type,
 160                                                   int *subtype);
 161
 162         int (*me_subdevice_query_subdevice_caps) (struct me_subdevice *
 163                                                   subdevice, int *caps);
 164
 165         int (*me_subdevice_query_subdevice_caps_args) (struct me_subdevice *
 166                                                        subdevice, int cap,
 167                                                        int *args, int count);
 168
 169         int (*me_subdevice_query_timer) (struct me_subdevice * subdevice,
 170                                          int timer,
 171                                          int *base_frequency,
 172                                          long long *min_ticks,
 173                                          long long *max_ticks);
 174
 175         int (*me_subdevice_config_load) (struct me_subdevice * subdevice,
 176                                          me_cfg_device_entry_t * config);
 177
 178         void (*me_subdevice_destructor) (struct me_subdevice * subdevice);
 179 } me_subdevice_t;
 180
 181 /**
 182  * @brief Initializes a subdevice structure.
 183  *
 184  * @param subdevice The subdevice structure to initialize.
 185  * @return 0 on success.
 186  */
 187 int me_subdevice_init(me_subdevice_t * subdevice);
 188
 189 /**
 190  * @brief Deinitializes a subdevice structure.
 191  *
 192  * @param subdevice The subdevice structure to initialize.
 193  */
 194 void me_subdevice_deinit(me_subdevice_t * subdevice);
 195
 196 #endif
 197 #endif