Commit | Line | Data |
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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> | |
ed9eccbe DS |
29 | #include <linux/kdev_t.h> |
30 | #include <linux/slab.h> | |
31 | #include <linux/errno.h> | |
32 | #include <linux/spinlock.h> | |
33 | #include <linux/mutex.h> | |
34 | #include <linux/wait.h> | |
35 | #include <linux/mm.h> | |
36 | #include <linux/init.h> | |
37 | #include <linux/vmalloc.h> | |
74b847f4 | 38 | #include "interrupt.h" |
ed9eccbe | 39 | #include <linux/dma-mapping.h> |
e0dcef71 GKH |
40 | #include <linux/uaccess.h> |
41 | #include <linux/io.h> | |
ed9eccbe DS |
42 | |
43 | #include "comedi.h" | |
44 | ||
e0dcef71 GKH |
45 | #define DPRINTK(format, args...) do { \ |
46 | if (comedi_debug) \ | |
47 | printk(KERN_DEBUG "comedi: " format , ## args); \ | |
48 | } while (0) | |
ed9eccbe | 49 | |
e0dcef71 GKH |
50 | #define COMEDI_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + (c)) |
51 | #define COMEDI_VERSION_CODE COMEDI_VERSION(COMEDI_MAJORVERSION, COMEDI_MINORVERSION, COMEDI_MICROVERSION) | |
ed9eccbe DS |
52 | #define COMEDI_RELEASE VERSION |
53 | ||
54 | #define COMEDI_INITCLEANUP_NOMODULE(x) \ | |
55 | static int __init x ## _init_module(void) \ | |
51b713a6 | 56 | {return comedi_driver_register(&(x)); } \ |
ed9eccbe | 57 | static void __exit x ## _cleanup_module(void) \ |
51b713a6 | 58 | {comedi_driver_unregister(&(x)); } \ |
ed9eccbe DS |
59 | module_init(x ## _init_module); \ |
60 | module_exit(x ## _cleanup_module); \ | |
61 | ||
62 | #define COMEDI_MODULE_MACROS \ | |
63 | MODULE_AUTHOR("Comedi http://www.comedi.org"); \ | |
64 | MODULE_DESCRIPTION("Comedi low-level driver"); \ | |
65 | MODULE_LICENSE("GPL"); \ | |
66 | ||
67 | #define COMEDI_INITCLEANUP(x) \ | |
68 | COMEDI_MODULE_MACROS \ | |
69 | COMEDI_INITCLEANUP_NOMODULE(x) | |
70 | ||
71 | #define COMEDI_PCI_INITCLEANUP_NOMODULE(comedi_driver, pci_id_table) \ | |
72 | static int __devinit comedi_driver ## _pci_probe(struct pci_dev *dev, \ | |
73 | const struct pci_device_id *ent) \ | |
74 | { \ | |
75 | return comedi_pci_auto_config(dev, comedi_driver.driver_name); \ | |
76 | } \ | |
77 | static void __devexit comedi_driver ## _pci_remove(struct pci_dev *dev) \ | |
78 | { \ | |
79 | comedi_pci_auto_unconfig(dev); \ | |
80 | } \ | |
81 | static struct pci_driver comedi_driver ## _pci_driver = \ | |
82 | { \ | |
83 | .id_table = pci_id_table, \ | |
e0dcef71 GKH |
84 | .probe = &comedi_driver ## _pci_probe, \ |
85 | .remove = __devexit_p(&comedi_driver ## _pci_remove) \ | |
ed9eccbe DS |
86 | }; \ |
87 | static int __init comedi_driver ## _init_module(void) \ | |
88 | { \ | |
89 | int retval; \ | |
e0dcef71 GKH |
90 | retval = comedi_driver_register(&comedi_driver); \ |
91 | if (retval < 0) \ | |
92 | return retval; \ | |
93 | comedi_driver ## _pci_driver.name = (char *)comedi_driver.driver_name; \ | |
94 | return pci_register_driver(&comedi_driver ## _pci_driver); \ | |
ed9eccbe DS |
95 | } \ |
96 | static void __exit comedi_driver ## _cleanup_module(void) \ | |
97 | { \ | |
e0dcef71 GKH |
98 | pci_unregister_driver(&comedi_driver ## _pci_driver); \ |
99 | comedi_driver_unregister(&comedi_driver); \ | |
ed9eccbe DS |
100 | } \ |
101 | module_init(comedi_driver ## _init_module); \ | |
102 | module_exit(comedi_driver ## _cleanup_module); | |
103 | ||
104 | #define COMEDI_PCI_INITCLEANUP(comedi_driver, pci_id_table) \ | |
105 | COMEDI_MODULE_MACROS \ | |
106 | COMEDI_PCI_INITCLEANUP_NOMODULE(comedi_driver, pci_id_table) | |
107 | ||
108 | #define PCI_VENDOR_ID_INOVA 0x104c | |
109 | #define PCI_VENDOR_ID_NATINST 0x1093 | |
110 | #define PCI_VENDOR_ID_DATX 0x1116 | |
111 | #define PCI_VENDOR_ID_COMPUTERBOARDS 0x1307 | |
112 | #define PCI_VENDOR_ID_ADVANTECH 0x13fe | |
113 | #define PCI_VENDOR_ID_RTD 0x1435 | |
114 | #define PCI_VENDOR_ID_AMPLICON 0x14dc | |
115 | #define PCI_VENDOR_ID_ADLINK 0x144a | |
116 | #define PCI_VENDOR_ID_ICP 0x104c | |
117 | #define PCI_VENDOR_ID_CONTEC 0x1221 | |
118 | #define PCI_VENDOR_ID_MEILHAUS 0x1402 | |
119 | ||
120 | #define COMEDI_NUM_MINORS 0x100 | |
ed9eccbe DS |
121 | #define COMEDI_NUM_BOARD_MINORS 0x30 |
122 | #define COMEDI_FIRST_SUBDEVICE_MINOR COMEDI_NUM_BOARD_MINORS | |
123 | ||
ed9eccbe DS |
124 | #define COMEDI_DEVICE_CREATE(cs, parent, devt, drvdata, device, fmt...) \ |
125 | device_create(cs, ((parent) ? (parent) : (device)), devt, drvdata, fmt) | |
126 | ||
34c43922 | 127 | struct comedi_subdevice { |
71b5f4f1 | 128 | struct comedi_device *device; |
ed9eccbe DS |
129 | int type; |
130 | int n_chan; | |
131 | volatile int subdev_flags; | |
132 | int len_chanlist; /* maximum length of channel/gain list */ | |
133 | ||
134 | void *private; | |
135 | ||
d163679c | 136 | struct comedi_async *async; |
ed9eccbe DS |
137 | |
138 | void *lock; | |
139 | void *busy; | |
140 | unsigned runflags; | |
141 | spinlock_t spin_lock; | |
142 | ||
143 | int io_bits; | |
144 | ||
790c5541 BP |
145 | unsigned int maxdata; /* if maxdata==0, use list */ |
146 | const unsigned int *maxdata_list; /* list is channel specific */ | |
ed9eccbe DS |
147 | |
148 | unsigned int flags; | |
149 | const unsigned int *flaglist; | |
150 | ||
151 | unsigned int settling_time_0; | |
152 | ||
9ced1de6 BP |
153 | const struct comedi_lrange *range_table; |
154 | const struct comedi_lrange *const *range_table_list; | |
ed9eccbe DS |
155 | |
156 | unsigned int *chanlist; /* driver-owned chanlist (not used) */ | |
157 | ||
34c43922 | 158 | int (*insn_read) (struct comedi_device *, struct comedi_subdevice *, comedi_insn *, |
790c5541 | 159 | unsigned int *); |
34c43922 | 160 | int (*insn_write) (struct comedi_device *, struct comedi_subdevice *, comedi_insn *, |
790c5541 | 161 | unsigned int *); |
34c43922 | 162 | int (*insn_bits) (struct comedi_device *, struct comedi_subdevice *, comedi_insn *, |
790c5541 | 163 | unsigned int *); |
34c43922 | 164 | int (*insn_config) (struct comedi_device *, struct comedi_subdevice *, comedi_insn *, |
790c5541 | 165 | unsigned int *); |
ed9eccbe | 166 | |
34c43922 | 167 | int (*do_cmd) (struct comedi_device *, struct comedi_subdevice *); |
ea6d0d4c | 168 | int (*do_cmdtest) (struct comedi_device *, struct comedi_subdevice *, struct comedi_cmd *); |
34c43922 BP |
169 | int (*poll) (struct comedi_device *, struct comedi_subdevice *); |
170 | int (*cancel) (struct comedi_device *, struct comedi_subdevice *); | |
171 | /* int (*do_lock)(struct comedi_device *,struct comedi_subdevice *); */ | |
172 | /* int (*do_unlock)(struct comedi_device *,struct comedi_subdevice *); */ | |
ed9eccbe DS |
173 | |
174 | /* called when the buffer changes */ | |
34c43922 | 175 | int (*buf_change) (struct comedi_device *dev, struct comedi_subdevice *s, |
ed9eccbe DS |
176 | unsigned long new_size); |
177 | ||
34c43922 | 178 | void (*munge) (struct comedi_device *dev, struct comedi_subdevice *s, void *data, |
ed9eccbe DS |
179 | unsigned int num_bytes, unsigned int start_chan_index); |
180 | enum dma_data_direction async_dma_dir; | |
181 | ||
182 | unsigned int state; | |
183 | ||
0bfbbe8f | 184 | struct device *class_dev; |
ed9eccbe DS |
185 | int minor; |
186 | }; | |
187 | ||
188 | struct comedi_buf_page { | |
189 | void *virt_addr; | |
190 | dma_addr_t dma_addr; | |
191 | }; | |
192 | ||
d163679c | 193 | struct comedi_async { |
34c43922 | 194 | struct comedi_subdevice *subdevice; |
ed9eccbe DS |
195 | |
196 | void *prealloc_buf; /* pre-allocated buffer */ | |
197 | unsigned int prealloc_bufsz; /* buffer size, in bytes */ | |
198 | struct comedi_buf_page *buf_page_list; /* virtual and dma address of each page */ | |
199 | unsigned n_buf_pages; /* num elements in buf_page_list */ | |
200 | ||
201 | unsigned int max_bufsize; /* maximum buffer size, bytes */ | |
202 | unsigned int mmap_count; /* current number of mmaps of prealloc_buf */ | |
203 | ||
204 | unsigned int buf_write_count; /* byte count for writer (write completed) */ | |
205 | unsigned int buf_write_alloc_count; /* byte count for writer (allocated for writing) */ | |
206 | unsigned int buf_read_count; /* byte count for reader (read completed) */ | |
207 | unsigned int buf_read_alloc_count; /* byte count for reader (allocated for reading) */ | |
208 | ||
209 | unsigned int buf_write_ptr; /* buffer marker for writer */ | |
210 | unsigned int buf_read_ptr; /* buffer marker for reader */ | |
211 | ||
212 | unsigned int cur_chan; /* useless channel marker for interrupt */ | |
213 | /* number of bytes that have been received for current scan */ | |
214 | unsigned int scan_progress; | |
215 | /* keeps track of where we are in chanlist as for munging */ | |
216 | unsigned int munge_chan; | |
217 | /* number of bytes that have been munged */ | |
218 | unsigned int munge_count; | |
219 | /* buffer marker for munging */ | |
220 | unsigned int munge_ptr; | |
221 | ||
222 | unsigned int events; /* events that have occurred */ | |
223 | ||
ea6d0d4c | 224 | struct comedi_cmd cmd; |
ed9eccbe DS |
225 | |
226 | wait_queue_head_t wait_head; | |
227 | ||
e0dcef71 | 228 | /* callback stuff */ |
ed9eccbe DS |
229 | unsigned int cb_mask; |
230 | int (*cb_func) (unsigned int flags, void *); | |
231 | void *cb_arg; | |
232 | ||
34c43922 | 233 | int (*inttrig) (struct comedi_device *dev, struct comedi_subdevice *s, |
e0dcef71 | 234 | unsigned int x); |
ed9eccbe DS |
235 | }; |
236 | ||
139dfbdf BP |
237 | struct comedi_driver { |
238 | struct comedi_driver *next; | |
ed9eccbe DS |
239 | |
240 | const char *driver_name; | |
241 | struct module *module; | |
71b5f4f1 BP |
242 | int (*attach) (struct comedi_device *, comedi_devconfig *); |
243 | int (*detach) (struct comedi_device *); | |
ed9eccbe DS |
244 | |
245 | /* number of elements in board_name and board_id arrays */ | |
246 | unsigned int num_names; | |
247 | const char *const *board_name; | |
248 | /* offset in bytes from one board name pointer to the next */ | |
249 | int offset; | |
250 | }; | |
251 | ||
71b5f4f1 | 252 | struct comedi_device { |
ed9eccbe | 253 | int use_count; |
139dfbdf | 254 | struct comedi_driver *driver; |
ed9eccbe DS |
255 | void *private; |
256 | ||
0bfbbe8f | 257 | struct device *class_dev; |
ed9eccbe | 258 | int minor; |
e0dcef71 GKH |
259 | /* hw_dev is passed to dma_alloc_coherent when allocating async buffers |
260 | * for subdevices that have async_dma_dir set to something other than | |
261 | * DMA_NONE */ | |
ed9eccbe DS |
262 | struct device *hw_dev; |
263 | ||
264 | const char *board_name; | |
265 | const void *board_ptr; | |
266 | int attached; | |
267 | int rt; | |
268 | spinlock_t spinlock; | |
269 | struct mutex mutex; | |
270 | int in_request_module; | |
271 | ||
272 | int n_subdevices; | |
34c43922 | 273 | struct comedi_subdevice *subdevices; |
ed9eccbe DS |
274 | |
275 | /* dumb */ | |
276 | unsigned long iobase; | |
277 | unsigned int irq; | |
278 | ||
34c43922 BP |
279 | struct comedi_subdevice *read_subdev; |
280 | struct comedi_subdevice *write_subdev; | |
ed9eccbe DS |
281 | |
282 | struct fasync_struct *async_queue; | |
283 | ||
71b5f4f1 BP |
284 | void (*open) (struct comedi_device *dev); |
285 | void (*close) (struct comedi_device *dev); | |
ed9eccbe DS |
286 | }; |
287 | ||
288 | struct comedi_device_file_info { | |
71b5f4f1 | 289 | struct comedi_device *device; |
34c43922 BP |
290 | struct comedi_subdevice *read_subdevice; |
291 | struct comedi_subdevice *write_subdevice; | |
ed9eccbe DS |
292 | }; |
293 | ||
294 | #ifdef CONFIG_COMEDI_DEBUG | |
295 | extern int comedi_debug; | |
296 | #else | |
e0dcef71 | 297 | static const int comedi_debug; |
ed9eccbe DS |
298 | #endif |
299 | ||
300 | /* | |
301 | * function prototypes | |
302 | */ | |
303 | ||
34c43922 | 304 | void comedi_event(struct comedi_device *dev, struct comedi_subdevice *s); |
71b5f4f1 | 305 | void comedi_error(const struct comedi_device *dev, const char *s); |
ed9eccbe DS |
306 | |
307 | /* we can expand the number of bits used to encode devices/subdevices into | |
308 | the minor number soon, after more distros support > 8 bit minor numbers | |
309 | (like after Debian Etch gets released) */ | |
310 | enum comedi_minor_bits { | |
311 | COMEDI_DEVICE_MINOR_MASK = 0xf, | |
312 | COMEDI_SUBDEVICE_MINOR_MASK = 0xf0 | |
313 | }; | |
314 | static const unsigned COMEDI_SUBDEVICE_MINOR_SHIFT = 4; | |
315 | static const unsigned COMEDI_SUBDEVICE_MINOR_OFFSET = 1; | |
316 | ||
e0dcef71 | 317 | struct comedi_device_file_info *comedi_get_device_file_info(unsigned minor); |
ed9eccbe | 318 | |
34c43922 | 319 | static inline struct comedi_subdevice *comedi_get_read_subdevice( |
e0dcef71 | 320 | const struct comedi_device_file_info *info) |
ed9eccbe | 321 | { |
e0dcef71 GKH |
322 | if (info->read_subdevice) |
323 | return info->read_subdevice; | |
324 | if (info->device == NULL) | |
325 | return NULL; | |
ed9eccbe DS |
326 | return info->device->read_subdev; |
327 | } | |
328 | ||
34c43922 | 329 | static inline struct comedi_subdevice *comedi_get_write_subdevice( |
e0dcef71 | 330 | const struct comedi_device_file_info *info) |
ed9eccbe | 331 | { |
e0dcef71 GKH |
332 | if (info->write_subdevice) |
333 | return info->write_subdevice; | |
334 | if (info->device == NULL) | |
335 | return NULL; | |
ed9eccbe DS |
336 | return info->device->write_subdev; |
337 | } | |
338 | ||
71b5f4f1 BP |
339 | void comedi_device_detach(struct comedi_device *dev); |
340 | int comedi_device_attach(struct comedi_device *dev, comedi_devconfig *it); | |
139dfbdf BP |
341 | int comedi_driver_register(struct comedi_driver *); |
342 | int comedi_driver_unregister(struct comedi_driver *); | |
ed9eccbe DS |
343 | |
344 | void init_polling(void); | |
345 | void cleanup_polling(void); | |
71b5f4f1 BP |
346 | void start_polling(struct comedi_device *); |
347 | void stop_polling(struct comedi_device *); | |
ed9eccbe | 348 | |
34c43922 | 349 | int comedi_buf_alloc(struct comedi_device *dev, struct comedi_subdevice *s, unsigned long |
ed9eccbe DS |
350 | new_size); |
351 | ||
352 | #ifdef CONFIG_PROC_FS | |
353 | void comedi_proc_init(void); | |
354 | void comedi_proc_cleanup(void); | |
355 | #else | |
356 | static inline void comedi_proc_init(void) | |
357 | { | |
358 | } | |
359 | static inline void comedi_proc_cleanup(void) | |
360 | { | |
361 | } | |
362 | #endif | |
363 | ||
364 | /* subdevice runflags */ | |
365 | enum subdevice_runflags { | |
366 | SRF_USER = 0x00000001, | |
367 | SRF_RT = 0x00000002, | |
e0dcef71 GKH |
368 | /* indicates an COMEDI_CB_ERROR event has occurred since the last |
369 | * command was started */ | |
ed9eccbe DS |
370 | SRF_ERROR = 0x00000004, |
371 | SRF_RUNNING = 0x08000000 | |
372 | }; | |
373 | ||
374 | /* | |
375 | various internal comedi functions | |
376 | */ | |
377 | ||
71b5f4f1 | 378 | int do_rangeinfo_ioctl(struct comedi_device *dev, comedi_rangeinfo *arg); |
34c43922 BP |
379 | int check_chanlist(struct comedi_subdevice *s, int n, unsigned int *chanlist); |
380 | void comedi_set_subdevice_runflags(struct comedi_subdevice *s, unsigned mask, | |
ed9eccbe | 381 | unsigned bits); |
34c43922 BP |
382 | unsigned comedi_get_subdevice_runflags(struct comedi_subdevice *s); |
383 | int insn_inval(struct comedi_device *dev, struct comedi_subdevice *s, | |
790c5541 | 384 | comedi_insn *insn, unsigned int *data); |
ed9eccbe DS |
385 | |
386 | /* range stuff */ | |
387 | ||
e0dcef71 GKH |
388 | #define RANGE(a, b) {(a)*1e6, (b)*1e6, 0} |
389 | #define RANGE_ext(a, b) {(a)*1e6, (b)*1e6, RF_EXTERNAL} | |
390 | #define RANGE_mA(a, b) {(a)*1e6, (b)*1e6, UNIT_mA} | |
391 | #define RANGE_unitless(a, b) {(a)*1e6, (b)*1e6, 0} /* XXX */ | |
392 | #define BIP_RANGE(a) {-(a)*1e6, (a)*1e6, 0} | |
393 | #define UNI_RANGE(a) {0, (a)*1e6, 0} | |
ed9eccbe | 394 | |
9ced1de6 BP |
395 | extern const struct comedi_lrange range_bipolar10; |
396 | extern const struct comedi_lrange range_bipolar5; | |
397 | extern const struct comedi_lrange range_bipolar2_5; | |
398 | extern const struct comedi_lrange range_unipolar10; | |
399 | extern const struct comedi_lrange range_unipolar5; | |
400 | extern const struct comedi_lrange range_unknown; | |
ed9eccbe DS |
401 | |
402 | #define range_digital range_unipolar5 | |
403 | ||
404 | #if __GNUC__ >= 3 | |
405 | #define GCC_ZERO_LENGTH_ARRAY | |
406 | #else | |
407 | #define GCC_ZERO_LENGTH_ARRAY 0 | |
408 | #endif | |
409 | ||
9ced1de6 | 410 | struct comedi_lrange { |
ed9eccbe DS |
411 | int length; |
412 | comedi_krange range[GCC_ZERO_LENGTH_ARRAY]; | |
413 | }; | |
414 | ||
415 | /* some silly little inline functions */ | |
416 | ||
71b5f4f1 | 417 | static inline int alloc_subdevices(struct comedi_device *dev, |
e0dcef71 | 418 | unsigned int num_subdevices) |
ed9eccbe DS |
419 | { |
420 | unsigned i; | |
421 | ||
422 | dev->n_subdevices = num_subdevices; | |
423 | dev->subdevices = | |
34c43922 | 424 | kcalloc(num_subdevices, sizeof(struct comedi_subdevice), GFP_KERNEL); |
ed9eccbe DS |
425 | if (!dev->subdevices) |
426 | return -ENOMEM; | |
427 | for (i = 0; i < num_subdevices; ++i) { | |
428 | dev->subdevices[i].device = dev; | |
429 | dev->subdevices[i].async_dma_dir = DMA_NONE; | |
430 | spin_lock_init(&dev->subdevices[i].spin_lock); | |
431 | dev->subdevices[i].minor = -1; | |
432 | } | |
433 | return 0; | |
434 | } | |
435 | ||
71b5f4f1 | 436 | static inline int alloc_private(struct comedi_device *dev, int size) |
ed9eccbe DS |
437 | { |
438 | dev->private = kzalloc(size, GFP_KERNEL); | |
439 | if (!dev->private) | |
440 | return -ENOMEM; | |
441 | return 0; | |
442 | } | |
443 | ||
34c43922 | 444 | static inline unsigned int bytes_per_sample(const struct comedi_subdevice *subd) |
ed9eccbe DS |
445 | { |
446 | if (subd->subdev_flags & SDF_LSAMPL) | |
790c5541 | 447 | return sizeof(unsigned int); |
ed9eccbe | 448 | else |
790c5541 | 449 | return sizeof(short); |
ed9eccbe DS |
450 | } |
451 | ||
452 | /* must be used in attach to set dev->hw_dev if you wish to dma directly | |
453 | into comedi's buffer */ | |
71b5f4f1 | 454 | static inline void comedi_set_hw_dev(struct comedi_device *dev, struct device *hw_dev) |
ed9eccbe | 455 | { |
e0dcef71 | 456 | if (dev->hw_dev) |
ed9eccbe | 457 | put_device(dev->hw_dev); |
e0dcef71 | 458 | |
ed9eccbe DS |
459 | dev->hw_dev = hw_dev; |
460 | if (dev->hw_dev) { | |
461 | dev->hw_dev = get_device(dev->hw_dev); | |
462 | BUG_ON(dev->hw_dev == NULL); | |
463 | } | |
464 | } | |
465 | ||
d163679c BP |
466 | int comedi_buf_put(struct comedi_async *async, short x); |
467 | int comedi_buf_get(struct comedi_async *async, short *x); | |
ed9eccbe | 468 | |
d163679c BP |
469 | unsigned int comedi_buf_write_n_available(struct comedi_async *async); |
470 | unsigned int comedi_buf_write_alloc(struct comedi_async *async, unsigned int nbytes); | |
471 | unsigned int comedi_buf_write_alloc_strict(struct comedi_async *async, | |
ed9eccbe | 472 | unsigned int nbytes); |
d163679c BP |
473 | unsigned comedi_buf_write_free(struct comedi_async *async, unsigned int nbytes); |
474 | unsigned comedi_buf_read_alloc(struct comedi_async *async, unsigned nbytes); | |
475 | unsigned comedi_buf_read_free(struct comedi_async *async, unsigned int nbytes); | |
476 | unsigned int comedi_buf_read_n_available(struct comedi_async *async); | |
477 | void comedi_buf_memcpy_to(struct comedi_async *async, unsigned int offset, | |
ed9eccbe | 478 | const void *source, unsigned int num_bytes); |
d163679c | 479 | void comedi_buf_memcpy_from(struct comedi_async *async, unsigned int offset, |
ed9eccbe | 480 | void *destination, unsigned int num_bytes); |
d163679c | 481 | static inline unsigned comedi_buf_write_n_allocated(struct comedi_async *async) |
ed9eccbe DS |
482 | { |
483 | return async->buf_write_alloc_count - async->buf_write_count; | |
484 | } | |
d163679c | 485 | static inline unsigned comedi_buf_read_n_allocated(struct comedi_async *async) |
ed9eccbe DS |
486 | { |
487 | return async->buf_read_alloc_count - async->buf_read_count; | |
488 | } | |
489 | ||
d163679c | 490 | void comedi_reset_async_buf(struct comedi_async *async); |
ed9eccbe DS |
491 | |
492 | static inline void *comedi_aux_data(int options[], int n) | |
493 | { | |
494 | unsigned long address; | |
495 | unsigned long addressLow; | |
496 | int bit_shift; | |
497 | if (sizeof(int) >= sizeof(void *)) | |
498 | address = options[COMEDI_DEVCONF_AUX_DATA_LO]; | |
499 | else { | |
500 | address = options[COMEDI_DEVCONF_AUX_DATA_HI]; | |
501 | bit_shift = sizeof(int) * 8; | |
502 | address <<= bit_shift; | |
503 | addressLow = options[COMEDI_DEVCONF_AUX_DATA_LO]; | |
504 | addressLow &= (1UL << bit_shift) - 1; | |
505 | address |= addressLow; | |
506 | } | |
507 | if (n >= 1) | |
508 | address += options[COMEDI_DEVCONF_AUX_DATA0_LENGTH]; | |
509 | if (n >= 2) | |
510 | address += options[COMEDI_DEVCONF_AUX_DATA1_LENGTH]; | |
511 | if (n >= 3) | |
512 | address += options[COMEDI_DEVCONF_AUX_DATA2_LENGTH]; | |
513 | BUG_ON(n > 3); | |
514 | return (void *)address; | |
515 | } | |
516 | ||
517 | int comedi_alloc_board_minor(struct device *hardware_device); | |
518 | void comedi_free_board_minor(unsigned minor); | |
34c43922 BP |
519 | int comedi_alloc_subdevice_minor(struct comedi_device *dev, struct comedi_subdevice *s); |
520 | void comedi_free_subdevice_minor(struct comedi_subdevice *s); | |
ed9eccbe DS |
521 | int comedi_pci_auto_config(struct pci_dev *pcidev, const char *board_name); |
522 | void comedi_pci_auto_unconfig(struct pci_dev *pcidev); | |
c28264da BP |
523 | struct usb_device; /* forward declaration */ |
524 | int comedi_usb_auto_config(struct usb_device *usbdev, const char *board_name); | |
525 | void comedi_usb_auto_unconfig(struct usb_device *usbdev); | |
ed9eccbe | 526 | |
ed9eccbe | 527 | #include "comedi_rt.h" |
ed9eccbe DS |
528 | |
529 | #endif /* _COMEDIDEV_H */ |