Commit | Line | Data |
---|---|---|
ed9eccbe DS |
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 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | ||
22 | */ | |
23 | ||
24 | #ifndef _COMEDIDEV_H | |
25 | #define _COMEDIDEV_H | |
26 | ||
27 | #include <linux/kernel.h> | |
28 | #include <linux/module.h> | |
29 | #include <linux/version.h> | |
30 | #include <linux/kdev_t.h> | |
31 | #include <linux/slab.h> | |
32 | #include <linux/errno.h> | |
33 | #include <linux/spinlock.h> | |
34 | #include <linux/mutex.h> | |
35 | #include <linux/wait.h> | |
36 | #include <linux/mm.h> | |
37 | #include <linux/init.h> | |
38 | #include <linux/vmalloc.h> | |
39 | #include <linux/mm.h> | |
74b847f4 | 40 | #include "interrupt.h" |
ed9eccbe | 41 | #include <linux/dma-mapping.h> |
e0dcef71 GKH |
42 | #include <linux/uaccess.h> |
43 | #include <linux/io.h> | |
ed9eccbe DS |
44 | |
45 | #include "comedi.h" | |
46 | ||
e0dcef71 GKH |
47 | #define DPRINTK(format, args...) do { \ |
48 | if (comedi_debug) \ | |
49 | printk(KERN_DEBUG "comedi: " format , ## args); \ | |
50 | } while (0) | |
ed9eccbe | 51 | |
e0dcef71 GKH |
52 | #define COMEDI_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + (c)) |
53 | #define COMEDI_VERSION_CODE COMEDI_VERSION(COMEDI_MAJORVERSION, COMEDI_MINORVERSION, COMEDI_MICROVERSION) | |
ed9eccbe DS |
54 | #define COMEDI_RELEASE VERSION |
55 | ||
56 | #define COMEDI_INITCLEANUP_NOMODULE(x) \ | |
57 | static int __init x ## _init_module(void) \ | |
58 | {return comedi_driver_register(&(x));} \ | |
59 | static void __exit x ## _cleanup_module(void) \ | |
60 | {comedi_driver_unregister(&(x));} \ | |
61 | module_init(x ## _init_module); \ | |
62 | module_exit(x ## _cleanup_module); \ | |
63 | ||
64 | #define COMEDI_MODULE_MACROS \ | |
65 | MODULE_AUTHOR("Comedi http://www.comedi.org"); \ | |
66 | MODULE_DESCRIPTION("Comedi low-level driver"); \ | |
67 | MODULE_LICENSE("GPL"); \ | |
68 | ||
69 | #define COMEDI_INITCLEANUP(x) \ | |
70 | COMEDI_MODULE_MACROS \ | |
71 | COMEDI_INITCLEANUP_NOMODULE(x) | |
72 | ||
73 | #define COMEDI_PCI_INITCLEANUP_NOMODULE(comedi_driver, pci_id_table) \ | |
74 | static int __devinit comedi_driver ## _pci_probe(struct pci_dev *dev, \ | |
75 | const struct pci_device_id *ent) \ | |
76 | { \ | |
77 | return comedi_pci_auto_config(dev, comedi_driver.driver_name); \ | |
78 | } \ | |
79 | static void __devexit comedi_driver ## _pci_remove(struct pci_dev *dev) \ | |
80 | { \ | |
81 | comedi_pci_auto_unconfig(dev); \ | |
82 | } \ | |
83 | static struct pci_driver comedi_driver ## _pci_driver = \ | |
84 | { \ | |
85 | .id_table = pci_id_table, \ | |
e0dcef71 GKH |
86 | .probe = &comedi_driver ## _pci_probe, \ |
87 | .remove = __devexit_p(&comedi_driver ## _pci_remove) \ | |
ed9eccbe DS |
88 | }; \ |
89 | static int __init comedi_driver ## _init_module(void) \ | |
90 | { \ | |
91 | int retval; \ | |
e0dcef71 GKH |
92 | retval = comedi_driver_register(&comedi_driver); \ |
93 | if (retval < 0) \ | |
94 | return retval; \ | |
95 | comedi_driver ## _pci_driver.name = (char *)comedi_driver.driver_name; \ | |
96 | return pci_register_driver(&comedi_driver ## _pci_driver); \ | |
ed9eccbe DS |
97 | } \ |
98 | static void __exit comedi_driver ## _cleanup_module(void) \ | |
99 | { \ | |
e0dcef71 GKH |
100 | pci_unregister_driver(&comedi_driver ## _pci_driver); \ |
101 | comedi_driver_unregister(&comedi_driver); \ | |
ed9eccbe DS |
102 | } \ |
103 | module_init(comedi_driver ## _init_module); \ | |
104 | module_exit(comedi_driver ## _cleanup_module); | |
105 | ||
106 | #define COMEDI_PCI_INITCLEANUP(comedi_driver, pci_id_table) \ | |
107 | COMEDI_MODULE_MACROS \ | |
108 | COMEDI_PCI_INITCLEANUP_NOMODULE(comedi_driver, pci_id_table) | |
109 | ||
110 | #define PCI_VENDOR_ID_INOVA 0x104c | |
111 | #define PCI_VENDOR_ID_NATINST 0x1093 | |
112 | #define PCI_VENDOR_ID_DATX 0x1116 | |
113 | #define PCI_VENDOR_ID_COMPUTERBOARDS 0x1307 | |
114 | #define PCI_VENDOR_ID_ADVANTECH 0x13fe | |
115 | #define PCI_VENDOR_ID_RTD 0x1435 | |
116 | #define PCI_VENDOR_ID_AMPLICON 0x14dc | |
117 | #define PCI_VENDOR_ID_ADLINK 0x144a | |
118 | #define PCI_VENDOR_ID_ICP 0x104c | |
119 | #define PCI_VENDOR_ID_CONTEC 0x1221 | |
120 | #define PCI_VENDOR_ID_MEILHAUS 0x1402 | |
121 | ||
122 | #define COMEDI_NUM_MINORS 0x100 | |
123 | #define COMEDI_NUM_LEGACY_MINORS 0x10 | |
124 | #define COMEDI_NUM_BOARD_MINORS 0x30 | |
125 | #define COMEDI_FIRST_SUBDEVICE_MINOR COMEDI_NUM_BOARD_MINORS | |
126 | ||
127 | typedef struct comedi_device_struct comedi_device; | |
128 | typedef struct comedi_subdevice_struct comedi_subdevice; | |
129 | typedef struct comedi_async_struct comedi_async; | |
130 | typedef struct comedi_driver_struct comedi_driver; | |
131 | typedef struct comedi_lrange_struct comedi_lrange; | |
132 | ||
133 | typedef struct device device_create_result_type; | |
134 | ||
135 | #define COMEDI_DEVICE_CREATE(cs, parent, devt, drvdata, device, fmt...) \ | |
136 | device_create(cs, ((parent) ? (parent) : (device)), devt, drvdata, fmt) | |
137 | ||
138 | struct comedi_subdevice_struct { | |
139 | comedi_device *device; | |
140 | int type; | |
141 | int n_chan; | |
142 | volatile int subdev_flags; | |
143 | int len_chanlist; /* maximum length of channel/gain list */ | |
144 | ||
145 | void *private; | |
146 | ||
147 | comedi_async *async; | |
148 | ||
149 | void *lock; | |
150 | void *busy; | |
151 | unsigned runflags; | |
152 | spinlock_t spin_lock; | |
153 | ||
154 | int io_bits; | |
155 | ||
156 | lsampl_t maxdata; /* if maxdata==0, use list */ | |
157 | const lsampl_t *maxdata_list; /* list is channel specific */ | |
158 | ||
159 | unsigned int flags; | |
160 | const unsigned int *flaglist; | |
161 | ||
162 | unsigned int settling_time_0; | |
163 | ||
164 | const comedi_lrange *range_table; | |
165 | const comedi_lrange *const *range_table_list; | |
166 | ||
167 | unsigned int *chanlist; /* driver-owned chanlist (not used) */ | |
168 | ||
169 | int (*insn_read) (comedi_device *, comedi_subdevice *, comedi_insn *, | |
170 | lsampl_t *); | |
171 | int (*insn_write) (comedi_device *, comedi_subdevice *, comedi_insn *, | |
172 | lsampl_t *); | |
173 | int (*insn_bits) (comedi_device *, comedi_subdevice *, comedi_insn *, | |
174 | lsampl_t *); | |
175 | int (*insn_config) (comedi_device *, comedi_subdevice *, comedi_insn *, | |
176 | lsampl_t *); | |
177 | ||
178 | int (*do_cmd) (comedi_device *, comedi_subdevice *); | |
179 | int (*do_cmdtest) (comedi_device *, comedi_subdevice *, comedi_cmd *); | |
180 | int (*poll) (comedi_device *, comedi_subdevice *); | |
181 | int (*cancel) (comedi_device *, comedi_subdevice *); | |
e0dcef71 GKH |
182 | /* int (*do_lock)(comedi_device *,comedi_subdevice *); */ |
183 | /* int (*do_unlock)(comedi_device *,comedi_subdevice *); */ | |
ed9eccbe DS |
184 | |
185 | /* called when the buffer changes */ | |
e0dcef71 | 186 | int (*buf_change) (comedi_device *dev, comedi_subdevice *s, |
ed9eccbe DS |
187 | unsigned long new_size); |
188 | ||
e0dcef71 | 189 | void (*munge) (comedi_device *dev, comedi_subdevice *s, void *data, |
ed9eccbe DS |
190 | unsigned int num_bytes, unsigned int start_chan_index); |
191 | enum dma_data_direction async_dma_dir; | |
192 | ||
193 | unsigned int state; | |
194 | ||
195 | device_create_result_type *class_dev; | |
196 | int minor; | |
197 | }; | |
198 | ||
199 | struct comedi_buf_page { | |
200 | void *virt_addr; | |
201 | dma_addr_t dma_addr; | |
202 | }; | |
203 | ||
204 | struct comedi_async_struct { | |
205 | comedi_subdevice *subdevice; | |
206 | ||
207 | void *prealloc_buf; /* pre-allocated buffer */ | |
208 | unsigned int prealloc_bufsz; /* buffer size, in bytes */ | |
209 | struct comedi_buf_page *buf_page_list; /* virtual and dma address of each page */ | |
210 | unsigned n_buf_pages; /* num elements in buf_page_list */ | |
211 | ||
212 | unsigned int max_bufsize; /* maximum buffer size, bytes */ | |
213 | unsigned int mmap_count; /* current number of mmaps of prealloc_buf */ | |
214 | ||
215 | unsigned int buf_write_count; /* byte count for writer (write completed) */ | |
216 | unsigned int buf_write_alloc_count; /* byte count for writer (allocated for writing) */ | |
217 | unsigned int buf_read_count; /* byte count for reader (read completed) */ | |
218 | unsigned int buf_read_alloc_count; /* byte count for reader (allocated for reading) */ | |
219 | ||
220 | unsigned int buf_write_ptr; /* buffer marker for writer */ | |
221 | unsigned int buf_read_ptr; /* buffer marker for reader */ | |
222 | ||
223 | unsigned int cur_chan; /* useless channel marker for interrupt */ | |
224 | /* number of bytes that have been received for current scan */ | |
225 | unsigned int scan_progress; | |
226 | /* keeps track of where we are in chanlist as for munging */ | |
227 | unsigned int munge_chan; | |
228 | /* number of bytes that have been munged */ | |
229 | unsigned int munge_count; | |
230 | /* buffer marker for munging */ | |
231 | unsigned int munge_ptr; | |
232 | ||
233 | unsigned int events; /* events that have occurred */ | |
234 | ||
235 | comedi_cmd cmd; | |
236 | ||
237 | wait_queue_head_t wait_head; | |
238 | ||
e0dcef71 | 239 | /* callback stuff */ |
ed9eccbe DS |
240 | unsigned int cb_mask; |
241 | int (*cb_func) (unsigned int flags, void *); | |
242 | void *cb_arg; | |
243 | ||
e0dcef71 GKH |
244 | int (*inttrig) (comedi_device *dev, comedi_subdevice *s, |
245 | unsigned int x); | |
ed9eccbe DS |
246 | }; |
247 | ||
248 | struct comedi_driver_struct { | |
249 | struct comedi_driver_struct *next; | |
250 | ||
251 | const char *driver_name; | |
252 | struct module *module; | |
253 | int (*attach) (comedi_device *, comedi_devconfig *); | |
254 | int (*detach) (comedi_device *); | |
255 | ||
256 | /* number of elements in board_name and board_id arrays */ | |
257 | unsigned int num_names; | |
258 | const char *const *board_name; | |
259 | /* offset in bytes from one board name pointer to the next */ | |
260 | int offset; | |
261 | }; | |
262 | ||
263 | struct comedi_device_struct { | |
264 | int use_count; | |
265 | comedi_driver *driver; | |
266 | void *private; | |
267 | ||
268 | device_create_result_type *class_dev; | |
269 | int minor; | |
e0dcef71 GKH |
270 | /* hw_dev is passed to dma_alloc_coherent when allocating async buffers |
271 | * for subdevices that have async_dma_dir set to something other than | |
272 | * DMA_NONE */ | |
ed9eccbe DS |
273 | struct device *hw_dev; |
274 | ||
275 | const char *board_name; | |
276 | const void *board_ptr; | |
277 | int attached; | |
278 | int rt; | |
279 | spinlock_t spinlock; | |
280 | struct mutex mutex; | |
281 | int in_request_module; | |
282 | ||
283 | int n_subdevices; | |
284 | comedi_subdevice *subdevices; | |
285 | ||
286 | /* dumb */ | |
287 | unsigned long iobase; | |
288 | unsigned int irq; | |
289 | ||
290 | comedi_subdevice *read_subdev; | |
291 | comedi_subdevice *write_subdev; | |
292 | ||
293 | struct fasync_struct *async_queue; | |
294 | ||
e0dcef71 GKH |
295 | void (*open) (comedi_device *dev); |
296 | void (*close) (comedi_device *dev); | |
ed9eccbe DS |
297 | }; |
298 | ||
299 | struct comedi_device_file_info { | |
300 | comedi_device *device; | |
301 | comedi_subdevice *read_subdevice; | |
302 | comedi_subdevice *write_subdevice; | |
303 | }; | |
304 | ||
305 | #ifdef CONFIG_COMEDI_DEBUG | |
306 | extern int comedi_debug; | |
307 | #else | |
e0dcef71 | 308 | static const int comedi_debug; |
ed9eccbe DS |
309 | #endif |
310 | ||
311 | /* | |
312 | * function prototypes | |
313 | */ | |
314 | ||
e0dcef71 GKH |
315 | void comedi_event(comedi_device *dev, comedi_subdevice *s); |
316 | void comedi_error(const comedi_device *dev, const char *s); | |
ed9eccbe DS |
317 | |
318 | /* we can expand the number of bits used to encode devices/subdevices into | |
319 | the minor number soon, after more distros support > 8 bit minor numbers | |
320 | (like after Debian Etch gets released) */ | |
321 | enum comedi_minor_bits { | |
322 | COMEDI_DEVICE_MINOR_MASK = 0xf, | |
323 | COMEDI_SUBDEVICE_MINOR_MASK = 0xf0 | |
324 | }; | |
325 | static const unsigned COMEDI_SUBDEVICE_MINOR_SHIFT = 4; | |
326 | static const unsigned COMEDI_SUBDEVICE_MINOR_OFFSET = 1; | |
327 | ||
e0dcef71 | 328 | struct comedi_device_file_info *comedi_get_device_file_info(unsigned minor); |
ed9eccbe | 329 | |
e0dcef71 GKH |
330 | static inline comedi_subdevice *comedi_get_read_subdevice( |
331 | const struct comedi_device_file_info *info) | |
ed9eccbe | 332 | { |
e0dcef71 GKH |
333 | if (info->read_subdevice) |
334 | return info->read_subdevice; | |
335 | if (info->device == NULL) | |
336 | return NULL; | |
ed9eccbe DS |
337 | return info->device->read_subdev; |
338 | } | |
339 | ||
e0dcef71 GKH |
340 | static inline comedi_subdevice *comedi_get_write_subdevice( |
341 | const struct comedi_device_file_info *info) | |
ed9eccbe | 342 | { |
e0dcef71 GKH |
343 | if (info->write_subdevice) |
344 | return info->write_subdevice; | |
345 | if (info->device == NULL) | |
346 | return NULL; | |
ed9eccbe DS |
347 | return info->device->write_subdev; |
348 | } | |
349 | ||
e0dcef71 GKH |
350 | void comedi_device_detach(comedi_device *dev); |
351 | int comedi_device_attach(comedi_device *dev, comedi_devconfig *it); | |
ed9eccbe DS |
352 | int comedi_driver_register(comedi_driver *); |
353 | int comedi_driver_unregister(comedi_driver *); | |
354 | ||
355 | void init_polling(void); | |
356 | void cleanup_polling(void); | |
357 | void start_polling(comedi_device *); | |
358 | void stop_polling(comedi_device *); | |
359 | ||
e0dcef71 | 360 | int comedi_buf_alloc(comedi_device *dev, comedi_subdevice *s, unsigned long |
ed9eccbe DS |
361 | new_size); |
362 | ||
363 | #ifdef CONFIG_PROC_FS | |
364 | void comedi_proc_init(void); | |
365 | void comedi_proc_cleanup(void); | |
366 | #else | |
367 | static inline void comedi_proc_init(void) | |
368 | { | |
369 | } | |
370 | static inline void comedi_proc_cleanup(void) | |
371 | { | |
372 | } | |
373 | #endif | |
374 | ||
375 | /* subdevice runflags */ | |
376 | enum subdevice_runflags { | |
377 | SRF_USER = 0x00000001, | |
378 | SRF_RT = 0x00000002, | |
e0dcef71 GKH |
379 | /* indicates an COMEDI_CB_ERROR event has occurred since the last |
380 | * command was started */ | |
ed9eccbe DS |
381 | SRF_ERROR = 0x00000004, |
382 | SRF_RUNNING = 0x08000000 | |
383 | }; | |
384 | ||
385 | /* | |
386 | various internal comedi functions | |
387 | */ | |
388 | ||
e0dcef71 GKH |
389 | int do_rangeinfo_ioctl(comedi_device *dev, comedi_rangeinfo *arg); |
390 | int check_chanlist(comedi_subdevice *s, int n, unsigned int *chanlist); | |
391 | void comedi_set_subdevice_runflags(comedi_subdevice *s, unsigned mask, | |
ed9eccbe | 392 | unsigned bits); |
e0dcef71 GKH |
393 | unsigned comedi_get_subdevice_runflags(comedi_subdevice *s); |
394 | int insn_inval(comedi_device *dev, comedi_subdevice *s, | |
395 | comedi_insn *insn, lsampl_t *data); | |
ed9eccbe DS |
396 | |
397 | /* range stuff */ | |
398 | ||
e0dcef71 GKH |
399 | #define RANGE(a, b) {(a)*1e6, (b)*1e6, 0} |
400 | #define RANGE_ext(a, b) {(a)*1e6, (b)*1e6, RF_EXTERNAL} | |
401 | #define RANGE_mA(a, b) {(a)*1e6, (b)*1e6, UNIT_mA} | |
402 | #define RANGE_unitless(a, b) {(a)*1e6, (b)*1e6, 0} /* XXX */ | |
403 | #define BIP_RANGE(a) {-(a)*1e6, (a)*1e6, 0} | |
404 | #define UNI_RANGE(a) {0, (a)*1e6, 0} | |
ed9eccbe DS |
405 | |
406 | extern const comedi_lrange range_bipolar10; | |
407 | extern const comedi_lrange range_bipolar5; | |
408 | extern const comedi_lrange range_bipolar2_5; | |
409 | extern const comedi_lrange range_unipolar10; | |
410 | extern const comedi_lrange range_unipolar5; | |
411 | extern const comedi_lrange range_unknown; | |
412 | ||
413 | #define range_digital range_unipolar5 | |
414 | ||
415 | #if __GNUC__ >= 3 | |
416 | #define GCC_ZERO_LENGTH_ARRAY | |
417 | #else | |
418 | #define GCC_ZERO_LENGTH_ARRAY 0 | |
419 | #endif | |
420 | ||
421 | struct comedi_lrange_struct { | |
422 | int length; | |
423 | comedi_krange range[GCC_ZERO_LENGTH_ARRAY]; | |
424 | }; | |
425 | ||
426 | /* some silly little inline functions */ | |
427 | ||
e0dcef71 GKH |
428 | static inline int alloc_subdevices(comedi_device *dev, |
429 | unsigned int num_subdevices) | |
ed9eccbe DS |
430 | { |
431 | unsigned i; | |
432 | ||
433 | dev->n_subdevices = num_subdevices; | |
434 | dev->subdevices = | |
435 | kcalloc(num_subdevices, sizeof(comedi_subdevice), GFP_KERNEL); | |
436 | if (!dev->subdevices) | |
437 | return -ENOMEM; | |
438 | for (i = 0; i < num_subdevices; ++i) { | |
439 | dev->subdevices[i].device = dev; | |
440 | dev->subdevices[i].async_dma_dir = DMA_NONE; | |
441 | spin_lock_init(&dev->subdevices[i].spin_lock); | |
442 | dev->subdevices[i].minor = -1; | |
443 | } | |
444 | return 0; | |
445 | } | |
446 | ||
e0dcef71 | 447 | static inline int alloc_private(comedi_device *dev, int size) |
ed9eccbe DS |
448 | { |
449 | dev->private = kzalloc(size, GFP_KERNEL); | |
450 | if (!dev->private) | |
451 | return -ENOMEM; | |
452 | return 0; | |
453 | } | |
454 | ||
e0dcef71 | 455 | static inline unsigned int bytes_per_sample(const comedi_subdevice *subd) |
ed9eccbe DS |
456 | { |
457 | if (subd->subdev_flags & SDF_LSAMPL) | |
458 | return sizeof(lsampl_t); | |
459 | else | |
460 | return sizeof(sampl_t); | |
461 | } | |
462 | ||
463 | /* must be used in attach to set dev->hw_dev if you wish to dma directly | |
464 | into comedi's buffer */ | |
e0dcef71 | 465 | static inline void comedi_set_hw_dev(comedi_device *dev, struct device *hw_dev) |
ed9eccbe | 466 | { |
e0dcef71 | 467 | if (dev->hw_dev) |
ed9eccbe | 468 | put_device(dev->hw_dev); |
e0dcef71 | 469 | |
ed9eccbe DS |
470 | dev->hw_dev = hw_dev; |
471 | if (dev->hw_dev) { | |
472 | dev->hw_dev = get_device(dev->hw_dev); | |
473 | BUG_ON(dev->hw_dev == NULL); | |
474 | } | |
475 | } | |
476 | ||
e0dcef71 GKH |
477 | int comedi_buf_put(comedi_async *async, sampl_t x); |
478 | int comedi_buf_get(comedi_async *async, sampl_t *x); | |
ed9eccbe | 479 | |
e0dcef71 GKH |
480 | unsigned int comedi_buf_write_n_available(comedi_async *async); |
481 | unsigned int comedi_buf_write_alloc(comedi_async *async, unsigned int nbytes); | |
482 | unsigned int comedi_buf_write_alloc_strict(comedi_async *async, | |
ed9eccbe | 483 | unsigned int nbytes); |
e0dcef71 GKH |
484 | unsigned comedi_buf_write_free(comedi_async *async, unsigned int nbytes); |
485 | unsigned comedi_buf_read_alloc(comedi_async *async, unsigned nbytes); | |
486 | unsigned comedi_buf_read_free(comedi_async *async, unsigned int nbytes); | |
487 | unsigned int comedi_buf_read_n_available(comedi_async *async); | |
488 | void comedi_buf_memcpy_to(comedi_async *async, unsigned int offset, | |
ed9eccbe | 489 | const void *source, unsigned int num_bytes); |
e0dcef71 | 490 | void comedi_buf_memcpy_from(comedi_async *async, unsigned int offset, |
ed9eccbe | 491 | void *destination, unsigned int num_bytes); |
e0dcef71 | 492 | static inline unsigned comedi_buf_write_n_allocated(comedi_async *async) |
ed9eccbe DS |
493 | { |
494 | return async->buf_write_alloc_count - async->buf_write_count; | |
495 | } | |
e0dcef71 | 496 | static inline unsigned comedi_buf_read_n_allocated(comedi_async *async) |
ed9eccbe DS |
497 | { |
498 | return async->buf_read_alloc_count - async->buf_read_count; | |
499 | } | |
500 | ||
e0dcef71 | 501 | void comedi_reset_async_buf(comedi_async *async); |
ed9eccbe DS |
502 | |
503 | static inline void *comedi_aux_data(int options[], int n) | |
504 | { | |
505 | unsigned long address; | |
506 | unsigned long addressLow; | |
507 | int bit_shift; | |
508 | if (sizeof(int) >= sizeof(void *)) | |
509 | address = options[COMEDI_DEVCONF_AUX_DATA_LO]; | |
510 | else { | |
511 | address = options[COMEDI_DEVCONF_AUX_DATA_HI]; | |
512 | bit_shift = sizeof(int) * 8; | |
513 | address <<= bit_shift; | |
514 | addressLow = options[COMEDI_DEVCONF_AUX_DATA_LO]; | |
515 | addressLow &= (1UL << bit_shift) - 1; | |
516 | address |= addressLow; | |
517 | } | |
518 | if (n >= 1) | |
519 | address += options[COMEDI_DEVCONF_AUX_DATA0_LENGTH]; | |
520 | if (n >= 2) | |
521 | address += options[COMEDI_DEVCONF_AUX_DATA1_LENGTH]; | |
522 | if (n >= 3) | |
523 | address += options[COMEDI_DEVCONF_AUX_DATA2_LENGTH]; | |
524 | BUG_ON(n > 3); | |
525 | return (void *)address; | |
526 | } | |
527 | ||
528 | int comedi_alloc_board_minor(struct device *hardware_device); | |
529 | void comedi_free_board_minor(unsigned minor); | |
530 | int comedi_alloc_subdevice_minor(comedi_device *dev, comedi_subdevice *s); | |
531 | void comedi_free_subdevice_minor(comedi_subdevice *s); | |
532 | int comedi_pci_auto_config(struct pci_dev *pcidev, const char *board_name); | |
533 | void comedi_pci_auto_unconfig(struct pci_dev *pcidev); | |
534 | ||
ed9eccbe | 535 | #include "comedi_rt.h" |
ed9eccbe DS |
536 | |
537 | #endif /* _COMEDIDEV_H */ |