1 /*
2 include/linux/comedidev.h
3 header file for kernel-only structures, variables, and constants
4
5 COMEDI - Linux Control and Measurement Device Interface
6 Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org>
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17 */
18
19 #ifndef _COMEDIDEV_H
20 #define _COMEDIDEV_H
21
22 #include <linux/dma-mapping.h>
23 #include <linux/mutex.h>
24 #include <linux/spinlock_types.h>
25 #include <linux/rwsem.h>
26 #include <linux/kref.h>
27
28 #include "comedi.h"
29
30 #define COMEDI_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + (c))
31 #define COMEDI_VERSION_CODE COMEDI_VERSION(COMEDI_MAJORVERSION, \
32 COMEDI_MINORVERSION, COMEDI_MICROVERSION)
33 #define COMEDI_RELEASE VERSION
34
35 #define COMEDI_NUM_BOARD_MINORS 0x30
36
37 struct comedi_subdevice {
38 struct comedi_device *device;
39 int index;
40 int type;
41 int n_chan;
42 int subdev_flags;
43 int len_chanlist; /* maximum length of channel/gain list */
44
45 void *private;
46
47 struct comedi_async *async;
48
49 void *lock;
50 void *busy;
51 unsigned runflags;
52 spinlock_t spin_lock;
53
54 unsigned int io_bits;
55
56 unsigned int maxdata; /* if maxdata==0, use list */
57 const unsigned int *maxdata_list; /* list is channel specific */
58
59 const struct comedi_lrange *range_table;
60 const struct comedi_lrange *const *range_table_list;
61
62 unsigned int *chanlist; /* driver-owned chanlist (not used) */
63
64 int (*insn_read)(struct comedi_device *, struct comedi_subdevice *,
65 struct comedi_insn *, unsigned int *);
66 int (*insn_write)(struct comedi_device *, struct comedi_subdevice *,
67 struct comedi_insn *, unsigned int *);
68 int (*insn_bits)(struct comedi_device *, struct comedi_subdevice *,
69 struct comedi_insn *, unsigned int *);
70 int (*insn_config)(struct comedi_device *, struct comedi_subdevice *,
71 struct comedi_insn *, unsigned int *);
72
73 int (*do_cmd)(struct comedi_device *, struct comedi_subdevice *);
74 int (*do_cmdtest)(struct comedi_device *, struct comedi_subdevice *,
75 struct comedi_cmd *);
76 int (*poll)(struct comedi_device *, struct comedi_subdevice *);
77 int (*cancel)(struct comedi_device *, struct comedi_subdevice *);
78
79 /* called when the buffer changes */
80 int (*buf_change)(struct comedi_device *, struct comedi_subdevice *);
81
82 void (*munge)(struct comedi_device *dev, struct comedi_subdevice *s,
83 void *data, unsigned int num_bytes,
84 unsigned int start_chan_index);
85 enum dma_data_direction async_dma_dir;
86
87 unsigned int state;
88
89 struct device *class_dev;
90 int minor;
91
92 unsigned int *readback;
93 };
94
95 struct comedi_buf_page {
96 void *virt_addr;
97 dma_addr_t dma_addr;
98 };
99
100 struct comedi_buf_map {
101 struct device *dma_hw_dev;
102 struct comedi_buf_page *page_list;
103 unsigned int n_pages;
104 enum dma_data_direction dma_dir;
105 struct kref refcount;
106 };
107
108 /**
109 * struct comedi_async - control data for asynchronous comedi commands
110 * @prealloc_buf: preallocated buffer
111 * @prealloc_bufsz: buffer size (in bytes)
112 * @buf_map: map of buffer pages
113 * @max_bufsize: maximum buffer size (in bytes)
114 * @buf_write_count: "write completed" count (in bytes, modulo 2**32)
115 * @buf_write_alloc_count: "allocated for writing" count (in bytes,
116 * modulo 2**32)
117 * @buf_read_count: "read completed" count (in bytes, modulo 2**32)
118 * @buf_read_alloc_count: "allocated for reading" count (in bytes,
119 * modulo 2**32)
120 * @buf_write_ptr: buffer position for writer
121 * @buf_read_ptr: buffer position for reader
122 * @cur_chan: current position in chanlist for scan (for those
123 * drivers that use it)
124 * @scan_progress: amount received or sent for current scan (in bytes)
125 * @munge_chan: current position in chanlist for "munging"
126 * @munge_count: "munge" count (in bytes, modulo 2**32)
127 * @munge_ptr: buffer position for "munging"
128 * @events: bit-vector of events that have occurred
129 * @cmd: details of comedi command in progress
130 * @wait_head: task wait queue for file reader or writer
131 * @cb_mask: bit-vector of events that should wake waiting tasks
132 * @inttrig: software trigger function for command, or NULL
133 *
134 * Note about the ..._count and ..._ptr members:
135 *
136 * Think of the _Count values being integers of unlimited size, indexing
137 * into a buffer of infinite length (though only an advancing portion
138 * of the buffer of fixed length prealloc_bufsz is accessible at any time).
139 * Then:
140 *
141 * Buf_Read_Count <= Buf_Read_Alloc_Count <= Munge_Count <=
142 * Buf_Write_Count <= Buf_Write_Alloc_Count <=
143 * (Buf_Read_Count + prealloc_bufsz)
144 *
145 * (Those aren't the actual members, apart from prealloc_bufsz.) When
146 * the buffer is reset, those _Count values start at 0 and only increase
147 * in value, maintaining the above inequalities until the next time the
148 * buffer is reset. The buffer is divided into the following regions by
149 * the inequalities:
150 *
151 * [0, Buf_Read_Count):
152 * old region no longer accessible
153 * [Buf_Read_Count, Buf_Read_Alloc_Count):
154 * filled and munged region allocated for reading but not yet read
155 * [Buf_Read_Alloc_Count, Munge_Count):
156 * filled and munged region not yet allocated for reading
157 * [Munge_Count, Buf_Write_Count):
158 * filled region not yet munged
159 * [Buf_Write_Count, Buf_Write_Alloc_Count):
160 * unfilled region allocated for writing but not yet written
161 * [Buf_Write_Alloc_Count, Buf_Read_Count + prealloc_bufsz):
162 * unfilled region not yet allocated for writing
163 * [Buf_Read_Count + prealloc_bufsz, infinity):
164 * unfilled region not yet accessible
165 *
166 * Data needs to be written into the buffer before it can be read out,
167 * and may need to be converted (or "munged") between the two
168 * operations. Extra unfilled buffer space may need to allocated for
169 * writing (advancing Buf_Write_Alloc_Count) before new data is written.
170 * After writing new data, the newly filled space needs to be released
171 * (advancing Buf_Write_Count). This also results in the new data being
172 * "munged" (advancing Munge_Count). Before data is read out of the
173 * buffer, extra space may need to be allocated for reading (advancing
174 * Buf_Read_Alloc_Count). After the data has been read out, the space
175 * needs to be released (advancing Buf_Read_Count).
176 *
177 * The actual members, buf_read_count, buf_read_alloc_count,
178 * munge_count, buf_write_count, and buf_write_alloc_count take the
179 * value of the corresponding capitalized _Count values modulo 2^32
180 * (UINT_MAX+1). Subtracting a "higher" _count value from a "lower"
181 * _count value gives the same answer as subtracting a "higher" _Count
182 * value from a lower _Count value because prealloc_bufsz < UINT_MAX+1.
183 * The modulo operation is done implicitly.
184 *
185 * The buf_read_ptr, munge_ptr, and buf_write_ptr members take the value
186 * of the corresponding capitalized _Count values modulo prealloc_bufsz.
187 * These correspond to byte indices in the physical buffer. The modulo
188 * operation is done by subtracting prealloc_bufsz when the value
189 * exceeds prealloc_bufsz (assuming prealloc_bufsz plus the increment is
190 * less than or equal to UINT_MAX).
191 */
192 struct comedi_async {
193 void *prealloc_buf;
194 unsigned int prealloc_bufsz;
195 struct comedi_buf_map *buf_map;
196 unsigned int max_bufsize;
197 unsigned int buf_write_count;
198 unsigned int buf_write_alloc_count;
199 unsigned int buf_read_count;
200 unsigned int buf_read_alloc_count;
201 unsigned int buf_write_ptr;
202 unsigned int buf_read_ptr;
203 unsigned int cur_chan;
204 unsigned int scan_progress;
205 unsigned int munge_chan;
206 unsigned int munge_count;
207 unsigned int munge_ptr;
208 unsigned int events;
209 struct comedi_cmd cmd;
210 wait_queue_head_t wait_head;
211 unsigned int cb_mask;
212 int (*inttrig)(struct comedi_device *dev, struct comedi_subdevice *s,
213 unsigned int x);
214 };
215
216 struct comedi_driver {
217 struct comedi_driver *next;
218
219 const char *driver_name;
220 struct module *module;
221 int (*attach)(struct comedi_device *, struct comedi_devconfig *);
222 void (*detach)(struct comedi_device *);
223 int (*auto_attach)(struct comedi_device *, unsigned long);
224
225 /* number of elements in board_name and board_id arrays */
226 unsigned int num_names;
227 const char *const *board_name;
228 /* offset in bytes from one board name pointer to the next */
229 int offset;
230 };
231
232 struct comedi_device {
233 int use_count;
234 struct comedi_driver *driver;
235 void *private;
236
237 struct device *class_dev;
238 int minor;
239 unsigned int detach_count;
240 /* hw_dev is passed to dma_alloc_coherent when allocating async buffers
241 * for subdevices that have async_dma_dir set to something other than
242 * DMA_NONE */
243 struct device *hw_dev;
244
245 const char *board_name;
246 const void *board_ptr;
247 bool attached:1;
248 bool ioenabled:1;
249 spinlock_t spinlock;
250 struct mutex mutex;
251 struct rw_semaphore attach_lock;
252 struct kref refcount;
253
254 int n_subdevices;
255 struct comedi_subdevice *subdevices;
256
257 /* dumb */
258 void __iomem *mmio;
259 unsigned long iobase;
260 unsigned long iolen;
261 unsigned int irq;
262
263 struct comedi_subdevice *read_subdev;
264 struct comedi_subdevice *write_subdev;
265
266 struct fasync_struct *async_queue;
267
268 int (*open)(struct comedi_device *dev);
269 void (*close)(struct comedi_device *dev);
270 };
271
272 /*
273 * function prototypes
274 */
275
276 void comedi_event(struct comedi_device *dev, struct comedi_subdevice *s);
277
278 /* we can expand the number of bits used to encode devices/subdevices into
279 the minor number soon, after more distros support > 8 bit minor numbers
280 (like after Debian Etch gets released) */
281 enum comedi_minor_bits {
282 COMEDI_DEVICE_MINOR_MASK = 0xf,
283 COMEDI_SUBDEVICE_MINOR_MASK = 0xf0
284 };
285
286 static const unsigned COMEDI_SUBDEVICE_MINOR_SHIFT = 4;
287 static const unsigned COMEDI_SUBDEVICE_MINOR_OFFSET = 1;
288
289 struct comedi_device *comedi_dev_get_from_minor(unsigned minor);
290 int comedi_dev_put(struct comedi_device *dev);
291
292 void init_polling(void);
293 void cleanup_polling(void);
294 void start_polling(struct comedi_device *);
295 void stop_polling(struct comedi_device *);
296
297 /* subdevice runflags */
298 enum subdevice_runflags {
299 SRF_RT = 0x00000002,
300 /* indicates an COMEDI_CB_ERROR event has occurred since the last
301 * command was started */
302 SRF_ERROR = 0x00000004,
303 SRF_RUNNING = 0x08000000,
304 SRF_FREE_SPRIV = 0x80000000, /* free s->private on detach */
305 };
306
307 bool comedi_is_subdevice_running(struct comedi_subdevice *s);
308
309 void *comedi_alloc_spriv(struct comedi_subdevice *s, size_t size);
310
311 int comedi_check_chanlist(struct comedi_subdevice *s,
312 int n,
313 unsigned int *chanlist);
314
315 /* range stuff */
316
317 #define RANGE(a, b) {(a)*1e6, (b)*1e6, 0}
318 #define RANGE_ext(a, b) {(a)*1e6, (b)*1e6, RF_EXTERNAL}
319 #define RANGE_mA(a, b) {(a)*1e6, (b)*1e6, UNIT_mA}
320 #define RANGE_unitless(a, b) {(a)*1e6, (b)*1e6, 0}
321 #define BIP_RANGE(a) {-(a)*1e6, (a)*1e6, 0}
322 #define UNI_RANGE(a) {0, (a)*1e6, 0}
323
324 extern const struct comedi_lrange range_bipolar10;
325 extern const struct comedi_lrange range_bipolar5;
326 extern const struct comedi_lrange range_bipolar2_5;
327 extern const struct comedi_lrange range_unipolar10;
328 extern const struct comedi_lrange range_unipolar5;
329 extern const struct comedi_lrange range_unipolar2_5;
330 extern const struct comedi_lrange range_0_20mA;
331 extern const struct comedi_lrange range_4_20mA;
332 extern const struct comedi_lrange range_0_32mA;
333 extern const struct comedi_lrange range_unknown;
334
335 #define range_digital range_unipolar5
336
337 #if __GNUC__ >= 3
338 #define GCC_ZERO_LENGTH_ARRAY
339 #else
340 #define GCC_ZERO_LENGTH_ARRAY 0
341 #endif
342
343 struct comedi_lrange {
344 int length;
345 struct comedi_krange range[GCC_ZERO_LENGTH_ARRAY];
346 };
347
comedi_range_is_bipolar(struct comedi_subdevice * s,unsigned int range)348 static inline bool comedi_range_is_bipolar(struct comedi_subdevice *s,
349 unsigned int range)
350 {
351 return s->range_table->range[range].min < 0;
352 }
353
comedi_range_is_unipolar(struct comedi_subdevice * s,unsigned int range)354 static inline bool comedi_range_is_unipolar(struct comedi_subdevice *s,
355 unsigned int range)
356 {
357 return s->range_table->range[range].min >= 0;
358 }
359
comedi_range_is_external(struct comedi_subdevice * s,unsigned int range)360 static inline bool comedi_range_is_external(struct comedi_subdevice *s,
361 unsigned int range)
362 {
363 return !!(s->range_table->range[range].flags & RF_EXTERNAL);
364 }
365
comedi_chan_range_is_bipolar(struct comedi_subdevice * s,unsigned int chan,unsigned int range)366 static inline bool comedi_chan_range_is_bipolar(struct comedi_subdevice *s,
367 unsigned int chan,
368 unsigned int range)
369 {
370 return s->range_table_list[chan]->range[range].min < 0;
371 }
372
comedi_chan_range_is_unipolar(struct comedi_subdevice * s,unsigned int chan,unsigned int range)373 static inline bool comedi_chan_range_is_unipolar(struct comedi_subdevice *s,
374 unsigned int chan,
375 unsigned int range)
376 {
377 return s->range_table_list[chan]->range[range].min >= 0;
378 }
379
comedi_chan_range_is_external(struct comedi_subdevice * s,unsigned int chan,unsigned int range)380 static inline bool comedi_chan_range_is_external(struct comedi_subdevice *s,
381 unsigned int chan,
382 unsigned int range)
383 {
384 return !!(s->range_table_list[chan]->range[range].flags & RF_EXTERNAL);
385 }
386
387 /* munge between offset binary and two's complement values */
comedi_offset_munge(struct comedi_subdevice * s,unsigned int val)388 static inline unsigned int comedi_offset_munge(struct comedi_subdevice *s,
389 unsigned int val)
390 {
391 return val ^ s->maxdata ^ (s->maxdata >> 1);
392 }
393
bytes_per_sample(const struct comedi_subdevice * subd)394 static inline unsigned int bytes_per_sample(const struct comedi_subdevice *subd)
395 {
396 if (subd->subdev_flags & SDF_LSAMPL)
397 return sizeof(unsigned int);
398
399 return sizeof(short);
400 }
401
402 /*
403 * Must set dev->hw_dev if you wish to dma directly into comedi's buffer.
404 * Also useful for retrieving a previously configured hardware device of
405 * known bus type. Set automatically for auto-configured devices.
406 * Automatically set to NULL when detaching hardware device.
407 */
408 int comedi_set_hw_dev(struct comedi_device *dev, struct device *hw_dev);
409
comedi_buf_n_bytes_ready(struct comedi_subdevice * s)410 static inline unsigned int comedi_buf_n_bytes_ready(struct comedi_subdevice *s)
411 {
412 return s->async->buf_write_count - s->async->buf_read_count;
413 }
414
415 unsigned int comedi_buf_write_alloc(struct comedi_subdevice *s, unsigned int n);
416 unsigned int comedi_buf_write_free(struct comedi_subdevice *s, unsigned int n);
417
418 unsigned int comedi_buf_read_n_available(struct comedi_subdevice *s);
419 unsigned int comedi_buf_read_alloc(struct comedi_subdevice *s, unsigned int n);
420 unsigned int comedi_buf_read_free(struct comedi_subdevice *s, unsigned int n);
421
422 int comedi_buf_put(struct comedi_subdevice *s, unsigned short x);
423 int comedi_buf_get(struct comedi_subdevice *s, unsigned short *x);
424
425 void comedi_buf_memcpy_to(struct comedi_subdevice *s, unsigned int offset,
426 const void *source, unsigned int num_bytes);
427 void comedi_buf_memcpy_from(struct comedi_subdevice *s, unsigned int offset,
428 void *destination, unsigned int num_bytes);
429 unsigned int comedi_write_array_to_buffer(struct comedi_subdevice *s,
430 const void *data,
431 unsigned int num_bytes);
432 unsigned int comedi_read_array_from_buffer(struct comedi_subdevice *s,
433 void *data, unsigned int num_bytes);
434
435 /* drivers.c - general comedi driver functions */
436
437 #define COMEDI_TIMEOUT_MS 1000
438
439 int comedi_timeout(struct comedi_device *, struct comedi_subdevice *,
440 struct comedi_insn *,
441 int (*cb)(struct comedi_device *, struct comedi_subdevice *,
442 struct comedi_insn *, unsigned long context),
443 unsigned long context);
444
445 unsigned int comedi_handle_events(struct comedi_device *dev,
446 struct comedi_subdevice *s);
447
448 int comedi_dio_insn_config(struct comedi_device *, struct comedi_subdevice *,
449 struct comedi_insn *, unsigned int *data,
450 unsigned int mask);
451 unsigned int comedi_dio_update_state(struct comedi_subdevice *,
452 unsigned int *data);
453 unsigned int comedi_bytes_per_scan(struct comedi_subdevice *s);
454 void comedi_inc_scan_progress(struct comedi_subdevice *s,
455 unsigned int num_bytes);
456
457 void *comedi_alloc_devpriv(struct comedi_device *, size_t);
458 int comedi_alloc_subdevices(struct comedi_device *, int);
459 int comedi_alloc_subdev_readback(struct comedi_subdevice *);
460
461 int comedi_readback_insn_read(struct comedi_device *, struct comedi_subdevice *,
462 struct comedi_insn *, unsigned int *data);
463
464 int comedi_load_firmware(struct comedi_device *, struct device *,
465 const char *name,
466 int (*cb)(struct comedi_device *,
467 const u8 *data, size_t size,
468 unsigned long context),
469 unsigned long context);
470
471 int __comedi_request_region(struct comedi_device *,
472 unsigned long start, unsigned long len);
473 int comedi_request_region(struct comedi_device *,
474 unsigned long start, unsigned long len);
475 void comedi_legacy_detach(struct comedi_device *);
476
477 int comedi_auto_config(struct device *, struct comedi_driver *,
478 unsigned long context);
479 void comedi_auto_unconfig(struct device *);
480
481 int comedi_driver_register(struct comedi_driver *);
482 void comedi_driver_unregister(struct comedi_driver *);
483
484 /**
485 * module_comedi_driver() - Helper macro for registering a comedi driver
486 * @__comedi_driver: comedi_driver struct
487 *
488 * Helper macro for comedi drivers which do not do anything special in module
489 * init/exit. This eliminates a lot of boilerplate. Each module may only use
490 * this macro once, and calling it replaces module_init() and module_exit().
491 */
492 #define module_comedi_driver(__comedi_driver) \
493 module_driver(__comedi_driver, comedi_driver_register, \
494 comedi_driver_unregister)
495
496 #ifdef CONFIG_COMEDI_PCI_DRIVERS
497
498 /* comedi_pci.c - comedi PCI driver specific functions */
499
500 /*
501 * PCI Vendor IDs not in <linux/pci_ids.h>
502 */
503 #define PCI_VENDOR_ID_KOLTER 0x1001
504 #define PCI_VENDOR_ID_ICP 0x104c
505 #define PCI_VENDOR_ID_DT 0x1116
506 #define PCI_VENDOR_ID_IOTECH 0x1616
507 #define PCI_VENDOR_ID_CONTEC 0x1221
508 #define PCI_VENDOR_ID_RTD 0x1435
509 #define PCI_VENDOR_ID_HUMUSOFT 0x186c
510
511 struct pci_dev;
512 struct pci_driver;
513
514 struct pci_dev *comedi_to_pci_dev(struct comedi_device *);
515
516 int comedi_pci_enable(struct comedi_device *);
517 void comedi_pci_disable(struct comedi_device *);
518 void comedi_pci_detach(struct comedi_device *);
519
520 int comedi_pci_auto_config(struct pci_dev *, struct comedi_driver *,
521 unsigned long context);
522 void comedi_pci_auto_unconfig(struct pci_dev *);
523
524 int comedi_pci_driver_register(struct comedi_driver *, struct pci_driver *);
525 void comedi_pci_driver_unregister(struct comedi_driver *, struct pci_driver *);
526
527 /**
528 * module_comedi_pci_driver() - Helper macro for registering a comedi PCI driver
529 * @__comedi_driver: comedi_driver struct
530 * @__pci_driver: pci_driver struct
531 *
532 * Helper macro for comedi PCI drivers which do not do anything special
533 * in module init/exit. This eliminates a lot of boilerplate. Each
534 * module may only use this macro once, and calling it replaces
535 * module_init() and module_exit()
536 */
537 #define module_comedi_pci_driver(__comedi_driver, __pci_driver) \
538 module_driver(__comedi_driver, comedi_pci_driver_register, \
539 comedi_pci_driver_unregister, &(__pci_driver))
540
541 #else
542
543 /*
544 * Some of the comedi mixed ISA/PCI drivers call the PCI specific
545 * functions. Provide some dummy functions if CONFIG_COMEDI_PCI_DRIVERS
546 * is not enabled.
547 */
548
comedi_to_pci_dev(struct comedi_device * dev)549 static inline struct pci_dev *comedi_to_pci_dev(struct comedi_device *dev)
550 {
551 return NULL;
552 }
553
comedi_pci_enable(struct comedi_device * dev)554 static inline int comedi_pci_enable(struct comedi_device *dev)
555 {
556 return -ENOSYS;
557 }
558
comedi_pci_disable(struct comedi_device * dev)559 static inline void comedi_pci_disable(struct comedi_device *dev)
560 {
561 }
562
comedi_pci_detach(struct comedi_device * dev)563 static inline void comedi_pci_detach(struct comedi_device *dev)
564 {
565 }
566
567 #endif /* CONFIG_COMEDI_PCI_DRIVERS */
568
569 #ifdef CONFIG_COMEDI_PCMCIA_DRIVERS
570
571 /* comedi_pcmcia.c - comedi PCMCIA driver specific functions */
572
573 struct pcmcia_driver;
574 struct pcmcia_device;
575
576 struct pcmcia_device *comedi_to_pcmcia_dev(struct comedi_device *);
577
578 int comedi_pcmcia_enable(struct comedi_device *,
579 int (*conf_check)(struct pcmcia_device *, void *));
580 void comedi_pcmcia_disable(struct comedi_device *);
581
582 int comedi_pcmcia_auto_config(struct pcmcia_device *, struct comedi_driver *);
583 void comedi_pcmcia_auto_unconfig(struct pcmcia_device *);
584
585 int comedi_pcmcia_driver_register(struct comedi_driver *,
586 struct pcmcia_driver *);
587 void comedi_pcmcia_driver_unregister(struct comedi_driver *,
588 struct pcmcia_driver *);
589
590 /**
591 * module_comedi_pcmcia_driver() - Helper macro for registering a comedi PCMCIA driver
592 * @__comedi_driver: comedi_driver struct
593 * @__pcmcia_driver: pcmcia_driver struct
594 *
595 * Helper macro for comedi PCMCIA drivers which do not do anything special
596 * in module init/exit. This eliminates a lot of boilerplate. Each
597 * module may only use this macro once, and calling it replaces
598 * module_init() and module_exit()
599 */
600 #define module_comedi_pcmcia_driver(__comedi_driver, __pcmcia_driver) \
601 module_driver(__comedi_driver, comedi_pcmcia_driver_register, \
602 comedi_pcmcia_driver_unregister, &(__pcmcia_driver))
603
604 #endif /* CONFIG_COMEDI_PCMCIA_DRIVERS */
605
606 #ifdef CONFIG_COMEDI_USB_DRIVERS
607
608 /* comedi_usb.c - comedi USB driver specific functions */
609
610 struct usb_driver;
611 struct usb_interface;
612
613 struct usb_interface *comedi_to_usb_interface(struct comedi_device *);
614 struct usb_device *comedi_to_usb_dev(struct comedi_device *);
615
616 int comedi_usb_auto_config(struct usb_interface *, struct comedi_driver *,
617 unsigned long context);
618 void comedi_usb_auto_unconfig(struct usb_interface *);
619
620 int comedi_usb_driver_register(struct comedi_driver *, struct usb_driver *);
621 void comedi_usb_driver_unregister(struct comedi_driver *, struct usb_driver *);
622
623 /**
624 * module_comedi_usb_driver() - Helper macro for registering a comedi USB driver
625 * @__comedi_driver: comedi_driver struct
626 * @__usb_driver: usb_driver struct
627 *
628 * Helper macro for comedi USB drivers which do not do anything special
629 * in module init/exit. This eliminates a lot of boilerplate. Each
630 * module may only use this macro once, and calling it replaces
631 * module_init() and module_exit()
632 */
633 #define module_comedi_usb_driver(__comedi_driver, __usb_driver) \
634 module_driver(__comedi_driver, comedi_usb_driver_register, \
635 comedi_usb_driver_unregister, &(__usb_driver))
636
637 #endif /* CONFIG_COMEDI_USB_DRIVERS */
638
639 #endif /* _COMEDIDEV_H */
640