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Merge branch 'for-linus' of git://github.com/schandinat/linux-2.6
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / staging / comedi / drivers / ni_tio.c
1 /*
2 comedi/drivers/ni_tio.c
3 Support for NI general purpose counters
4
5 Copyright (C) 2006 Frank Mori Hess <fmhess@users.sourceforge.net>
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22 /*
23 Driver: ni_tio
24 Description: National Instruments general purpose counters
25 Devices:
26 Author: J.P. Mellor <jpmellor@rose-hulman.edu>,
27 Herman.Bruyninckx@mech.kuleuven.ac.be,
28 Wim.Meeussen@mech.kuleuven.ac.be,
29 Klaas.Gadeyne@mech.kuleuven.ac.be,
30 Frank Mori Hess <fmhess@users.sourceforge.net>
31 Updated: Thu Nov 16 09:50:32 EST 2006
32 Status: works
33
34 This module is not used directly by end-users. Rather, it
35 is used by other drivers (for example ni_660x and ni_pcimio)
36 to provide support for NI's general purpose counters. It was
37 originally based on the counter code from ni_660x.c and
38 ni_mio_common.c.
39
40 References:
41 DAQ 660x Register-Level Programmer Manual (NI 370505A-01)
42 DAQ 6601/6602 User Manual (NI 322137B-01)
43 340934b.pdf DAQ-STC reference manual
44
45 */
46 /*
47 TODO:
48 Support use of both banks X and Y
49 */
50
51 #include "ni_tio_internal.h"
52
53 static uint64_t ni_tio_clock_period_ps(const struct ni_gpct *counter,
54 unsigned generic_clock_source);
55 static unsigned ni_tio_generic_clock_src_select(const struct ni_gpct *counter);
56
57 MODULE_AUTHOR("Comedi <comedi@comedi.org>");
58 MODULE_DESCRIPTION("Comedi support for NI general-purpose counters");
59 MODULE_LICENSE("GPL");
60
61 static inline enum Gi_Counting_Mode_Reg_Bits Gi_Alternate_Sync_Bit(enum
62 ni_gpct_variant
63 variant)
64 {
65 switch (variant) {
66 case ni_gpct_variant_e_series:
67 return 0;
68 break;
69 case ni_gpct_variant_m_series:
70 return Gi_M_Series_Alternate_Sync_Bit;
71 break;
72 case ni_gpct_variant_660x:
73 return Gi_660x_Alternate_Sync_Bit;
74 break;
75 default:
76 BUG();
77 break;
78 }
79 return 0;
80 }
81
82 static inline enum Gi_Counting_Mode_Reg_Bits Gi_Prescale_X2_Bit(enum
83 ni_gpct_variant
84 variant)
85 {
86 switch (variant) {
87 case ni_gpct_variant_e_series:
88 return 0;
89 break;
90 case ni_gpct_variant_m_series:
91 return Gi_M_Series_Prescale_X2_Bit;
92 break;
93 case ni_gpct_variant_660x:
94 return Gi_660x_Prescale_X2_Bit;
95 break;
96 default:
97 BUG();
98 break;
99 }
100 return 0;
101 }
102
103 static inline enum Gi_Counting_Mode_Reg_Bits Gi_Prescale_X8_Bit(enum
104 ni_gpct_variant
105 variant)
106 {
107 switch (variant) {
108 case ni_gpct_variant_e_series:
109 return 0;
110 break;
111 case ni_gpct_variant_m_series:
112 return Gi_M_Series_Prescale_X8_Bit;
113 break;
114 case ni_gpct_variant_660x:
115 return Gi_660x_Prescale_X8_Bit;
116 break;
117 default:
118 BUG();
119 break;
120 }
121 return 0;
122 }
123
124 static inline enum Gi_Counting_Mode_Reg_Bits Gi_HW_Arm_Select_Mask(enum
125 ni_gpct_variant
126 variant)
127 {
128 switch (variant) {
129 case ni_gpct_variant_e_series:
130 return 0;
131 break;
132 case ni_gpct_variant_m_series:
133 return Gi_M_Series_HW_Arm_Select_Mask;
134 break;
135 case ni_gpct_variant_660x:
136 return Gi_660x_HW_Arm_Select_Mask;
137 break;
138 default:
139 BUG();
140 break;
141 }
142 return 0;
143 }
144
145 /* clock sources for ni_660x boards, get bits with Gi_Source_Select_Bits() */
146 enum ni_660x_clock_source {
147 NI_660x_Timebase_1_Clock = 0x0, /* 20MHz */
148 NI_660x_Source_Pin_i_Clock = 0x1,
149 NI_660x_Next_Gate_Clock = 0xa,
150 NI_660x_Timebase_2_Clock = 0x12, /* 100KHz */
151 NI_660x_Next_TC_Clock = 0x13,
152 NI_660x_Timebase_3_Clock = 0x1e, /* 80MHz */
153 NI_660x_Logic_Low_Clock = 0x1f,
154 };
155 static const unsigned ni_660x_max_rtsi_channel = 6;
156 static inline unsigned NI_660x_RTSI_Clock(unsigned n)
157 {
158 BUG_ON(n > ni_660x_max_rtsi_channel);
159 return 0xb + n;
160 }
161
162 static const unsigned ni_660x_max_source_pin = 7;
163 static inline unsigned NI_660x_Source_Pin_Clock(unsigned n)
164 {
165 BUG_ON(n > ni_660x_max_source_pin);
166 return 0x2 + n;
167 }
168
169 /* clock sources for ni e and m series boards, get bits with Gi_Source_Select_Bits() */
170 enum ni_m_series_clock_source {
171 NI_M_Series_Timebase_1_Clock = 0x0, /* 20MHz */
172 NI_M_Series_Timebase_2_Clock = 0x12, /* 100KHz */
173 NI_M_Series_Next_TC_Clock = 0x13,
174 NI_M_Series_Next_Gate_Clock = 0x14, /* when Gi_Src_SubSelect = 0 */
175 NI_M_Series_PXI_Star_Trigger_Clock = 0x14, /* when Gi_Src_SubSelect = 1 */
176 NI_M_Series_PXI10_Clock = 0x1d,
177 NI_M_Series_Timebase_3_Clock = 0x1e, /* 80MHz, when Gi_Src_SubSelect = 0 */
178 NI_M_Series_Analog_Trigger_Out_Clock = 0x1e, /* when Gi_Src_SubSelect = 1 */
179 NI_M_Series_Logic_Low_Clock = 0x1f,
180 };
181 static const unsigned ni_m_series_max_pfi_channel = 15;
182 static inline unsigned NI_M_Series_PFI_Clock(unsigned n)
183 {
184 BUG_ON(n > ni_m_series_max_pfi_channel);
185 if (n < 10)
186 return 1 + n;
187 else
188 return 0xb + n;
189 }
190
191 static const unsigned ni_m_series_max_rtsi_channel = 7;
192 static inline unsigned NI_M_Series_RTSI_Clock(unsigned n)
193 {
194 BUG_ON(n > ni_m_series_max_rtsi_channel);
195 if (n == 7)
196 return 0x1b;
197 else
198 return 0xb + n;
199 }
200
201 enum ni_660x_gate_select {
202 NI_660x_Source_Pin_i_Gate_Select = 0x0,
203 NI_660x_Gate_Pin_i_Gate_Select = 0x1,
204 NI_660x_Next_SRC_Gate_Select = 0xa,
205 NI_660x_Next_Out_Gate_Select = 0x14,
206 NI_660x_Logic_Low_Gate_Select = 0x1f,
207 };
208 static const unsigned ni_660x_max_gate_pin = 7;
209 static inline unsigned NI_660x_Gate_Pin_Gate_Select(unsigned n)
210 {
211 BUG_ON(n > ni_660x_max_gate_pin);
212 return 0x2 + n;
213 }
214
215 static inline unsigned NI_660x_RTSI_Gate_Select(unsigned n)
216 {
217 BUG_ON(n > ni_660x_max_rtsi_channel);
218 return 0xb + n;
219 }
220
221 enum ni_m_series_gate_select {
222 NI_M_Series_Timestamp_Mux_Gate_Select = 0x0,
223 NI_M_Series_AI_START2_Gate_Select = 0x12,
224 NI_M_Series_PXI_Star_Trigger_Gate_Select = 0x13,
225 NI_M_Series_Next_Out_Gate_Select = 0x14,
226 NI_M_Series_AI_START1_Gate_Select = 0x1c,
227 NI_M_Series_Next_SRC_Gate_Select = 0x1d,
228 NI_M_Series_Analog_Trigger_Out_Gate_Select = 0x1e,
229 NI_M_Series_Logic_Low_Gate_Select = 0x1f,
230 };
231 static inline unsigned NI_M_Series_RTSI_Gate_Select(unsigned n)
232 {
233 BUG_ON(n > ni_m_series_max_rtsi_channel);
234 if (n == 7)
235 return 0x1b;
236 return 0xb + n;
237 }
238
239 static inline unsigned NI_M_Series_PFI_Gate_Select(unsigned n)
240 {
241 BUG_ON(n > ni_m_series_max_pfi_channel);
242 if (n < 10)
243 return 1 + n;
244 return 0xb + n;
245 }
246
247 static inline unsigned Gi_Source_Select_Bits(unsigned source)
248 {
249 return (source << Gi_Source_Select_Shift) & Gi_Source_Select_Mask;
250 }
251
252 static inline unsigned Gi_Gate_Select_Bits(unsigned gate_select)
253 {
254 return (gate_select << Gi_Gate_Select_Shift) & Gi_Gate_Select_Mask;
255 }
256
257 enum ni_660x_second_gate_select {
258 NI_660x_Source_Pin_i_Second_Gate_Select = 0x0,
259 NI_660x_Up_Down_Pin_i_Second_Gate_Select = 0x1,
260 NI_660x_Next_SRC_Second_Gate_Select = 0xa,
261 NI_660x_Next_Out_Second_Gate_Select = 0x14,
262 NI_660x_Selected_Gate_Second_Gate_Select = 0x1e,
263 NI_660x_Logic_Low_Second_Gate_Select = 0x1f,
264 };
265 static const unsigned ni_660x_max_up_down_pin = 7;
266 static inline unsigned NI_660x_Up_Down_Pin_Second_Gate_Select(unsigned n)
267 {
268 BUG_ON(n > ni_660x_max_up_down_pin);
269 return 0x2 + n;
270 }
271
272 static inline unsigned NI_660x_RTSI_Second_Gate_Select(unsigned n)
273 {
274 BUG_ON(n > ni_660x_max_rtsi_channel);
275 return 0xb + n;
276 }
277
278 static const unsigned int counter_status_mask =
279 COMEDI_COUNTER_ARMED | COMEDI_COUNTER_COUNTING;
280
281 static int __init ni_tio_init_module(void)
282 {
283 return 0;
284 }
285
286 module_init(ni_tio_init_module);
287
288 static void __exit ni_tio_cleanup_module(void)
289 {
290 }
291
292 module_exit(ni_tio_cleanup_module);
293
294 struct ni_gpct_device *ni_gpct_device_construct(struct comedi_device *dev,
295 void (*write_register) (struct
296 ni_gpct
297 *
298 counter,
299 unsigned
300 bits,
301 enum
302 ni_gpct_register
303 reg),
304 unsigned (*read_register)
305 (struct ni_gpct *counter,
306 enum ni_gpct_register reg),
307 enum ni_gpct_variant variant,
308 unsigned num_counters)
309 {
310 unsigned i;
311
312 struct ni_gpct_device *counter_dev =
313 kzalloc(sizeof(struct ni_gpct_device), GFP_KERNEL);
314 if (counter_dev == NULL)
315 return NULL;
316 counter_dev->dev = dev;
317 counter_dev->write_register = write_register;
318 counter_dev->read_register = read_register;
319 counter_dev->variant = variant;
320 spin_lock_init(&counter_dev->regs_lock);
321 BUG_ON(num_counters == 0);
322 counter_dev->counters =
323 kzalloc(sizeof(struct ni_gpct) * num_counters, GFP_KERNEL);
324 if (counter_dev->counters == NULL) {
325 kfree(counter_dev);
326 return NULL;
327 }
328 for (i = 0; i < num_counters; ++i) {
329 counter_dev->counters[i].counter_dev = counter_dev;
330 spin_lock_init(&counter_dev->counters[i].lock);
331 }
332 counter_dev->num_counters = num_counters;
333 return counter_dev;
334 }
335 EXPORT_SYMBOL_GPL(ni_gpct_device_construct);
336
337 void ni_gpct_device_destroy(struct ni_gpct_device *counter_dev)
338 {
339 if (counter_dev->counters == NULL)
340 return;
341 kfree(counter_dev->counters);
342 kfree(counter_dev);
343 }
344 EXPORT_SYMBOL_GPL(ni_gpct_device_destroy);
345
346 static int ni_tio_second_gate_registers_present(const struct ni_gpct_device
347 *counter_dev)
348 {
349 switch (counter_dev->variant) {
350 case ni_gpct_variant_e_series:
351 return 0;
352 break;
353 case ni_gpct_variant_m_series:
354 case ni_gpct_variant_660x:
355 return 1;
356 break;
357 default:
358 BUG();
359 break;
360 }
361 return 0;
362 }
363
364 static void ni_tio_reset_count_and_disarm(struct ni_gpct *counter)
365 {
366 write_register(counter, Gi_Reset_Bit(counter->counter_index),
367 NITIO_Gxx_Joint_Reset_Reg(counter->counter_index));
368 }
369
370 void ni_tio_init_counter(struct ni_gpct *counter)
371 {
372 struct ni_gpct_device *counter_dev = counter->counter_dev;
373
374 ni_tio_reset_count_and_disarm(counter);
375 /* initialize counter registers */
376 counter_dev->regs[NITIO_Gi_Autoincrement_Reg(counter->counter_index)] =
377 0x0;
378 write_register(counter,
379 counter_dev->
380 regs[NITIO_Gi_Autoincrement_Reg(counter->counter_index)],
381 NITIO_Gi_Autoincrement_Reg(counter->counter_index));
382 ni_tio_set_bits(counter, NITIO_Gi_Command_Reg(counter->counter_index),
383 ~0, Gi_Synchronize_Gate_Bit);
384 ni_tio_set_bits(counter, NITIO_Gi_Mode_Reg(counter->counter_index), ~0,
385 0);
386 counter_dev->regs[NITIO_Gi_LoadA_Reg(counter->counter_index)] = 0x0;
387 write_register(counter,
388 counter_dev->
389 regs[NITIO_Gi_LoadA_Reg(counter->counter_index)],
390 NITIO_Gi_LoadA_Reg(counter->counter_index));
391 counter_dev->regs[NITIO_Gi_LoadB_Reg(counter->counter_index)] = 0x0;
392 write_register(counter,
393 counter_dev->
394 regs[NITIO_Gi_LoadB_Reg(counter->counter_index)],
395 NITIO_Gi_LoadB_Reg(counter->counter_index));
396 ni_tio_set_bits(counter,
397 NITIO_Gi_Input_Select_Reg(counter->counter_index), ~0,
398 0);
399 if (ni_tio_counting_mode_registers_present(counter_dev)) {
400 ni_tio_set_bits(counter,
401 NITIO_Gi_Counting_Mode_Reg(counter->
402 counter_index), ~0,
403 0);
404 }
405 if (ni_tio_second_gate_registers_present(counter_dev)) {
406 counter_dev->
407 regs[NITIO_Gi_Second_Gate_Reg(counter->counter_index)] =
408 0x0;
409 write_register(counter,
410 counter_dev->
411 regs[NITIO_Gi_Second_Gate_Reg
412 (counter->counter_index)],
413 NITIO_Gi_Second_Gate_Reg(counter->
414 counter_index));
415 }
416 ni_tio_set_bits(counter,
417 NITIO_Gi_DMA_Config_Reg(counter->counter_index), ~0,
418 0x0);
419 ni_tio_set_bits(counter,
420 NITIO_Gi_Interrupt_Enable_Reg(counter->counter_index),
421 ~0, 0x0);
422 }
423 EXPORT_SYMBOL_GPL(ni_tio_init_counter);
424
425 static unsigned int ni_tio_counter_status(struct ni_gpct *counter)
426 {
427 unsigned int status = 0;
428 const unsigned bits = read_register(counter,
429 NITIO_Gxx_Status_Reg(counter->
430 counter_index));
431 if (bits & Gi_Armed_Bit(counter->counter_index)) {
432 status |= COMEDI_COUNTER_ARMED;
433 if (bits & Gi_Counting_Bit(counter->counter_index))
434 status |= COMEDI_COUNTER_COUNTING;
435 }
436 return status;
437 }
438
439 static void ni_tio_set_sync_mode(struct ni_gpct *counter, int force_alt_sync)
440 {
441 struct ni_gpct_device *counter_dev = counter->counter_dev;
442 const unsigned counting_mode_reg =
443 NITIO_Gi_Counting_Mode_Reg(counter->counter_index);
444 static const uint64_t min_normal_sync_period_ps = 25000;
445 const uint64_t clock_period_ps = ni_tio_clock_period_ps(counter,
446 ni_tio_generic_clock_src_select
447 (counter));
448
449 if (ni_tio_counting_mode_registers_present(counter_dev) == 0)
450 return;
451
452 switch (ni_tio_get_soft_copy(counter, counting_mode_reg) & Gi_Counting_Mode_Mask) {
453 case Gi_Counting_Mode_QuadratureX1_Bits:
454 case Gi_Counting_Mode_QuadratureX2_Bits:
455 case Gi_Counting_Mode_QuadratureX4_Bits:
456 case Gi_Counting_Mode_Sync_Source_Bits:
457 force_alt_sync = 1;
458 break;
459 default:
460 break;
461 }
462 /* It's not clear what we should do if clock_period is unknown, so we are not
463 using the alt sync bit in that case, but allow the caller to decide by using the
464 force_alt_sync parameter. */
465 if (force_alt_sync ||
466 (clock_period_ps && clock_period_ps < min_normal_sync_period_ps)) {
467 ni_tio_set_bits(counter, counting_mode_reg,
468 Gi_Alternate_Sync_Bit(counter_dev->variant),
469 Gi_Alternate_Sync_Bit(counter_dev->variant));
470 } else {
471 ni_tio_set_bits(counter, counting_mode_reg,
472 Gi_Alternate_Sync_Bit(counter_dev->variant),
473 0x0);
474 }
475 }
476
477 static int ni_tio_set_counter_mode(struct ni_gpct *counter, unsigned mode)
478 {
479 struct ni_gpct_device *counter_dev = counter->counter_dev;
480 unsigned mode_reg_mask;
481 unsigned mode_reg_values;
482 unsigned input_select_bits = 0;
483 /* these bits map directly on to the mode register */
484 static const unsigned mode_reg_direct_mask =
485 NI_GPCT_GATE_ON_BOTH_EDGES_BIT | NI_GPCT_EDGE_GATE_MODE_MASK |
486 NI_GPCT_STOP_MODE_MASK | NI_GPCT_OUTPUT_MODE_MASK |
487 NI_GPCT_HARDWARE_DISARM_MASK | NI_GPCT_LOADING_ON_TC_BIT |
488 NI_GPCT_LOADING_ON_GATE_BIT | NI_GPCT_LOAD_B_SELECT_BIT;
489
490 mode_reg_mask = mode_reg_direct_mask | Gi_Reload_Source_Switching_Bit;
491 mode_reg_values = mode & mode_reg_direct_mask;
492 switch (mode & NI_GPCT_RELOAD_SOURCE_MASK) {
493 case NI_GPCT_RELOAD_SOURCE_FIXED_BITS:
494 break;
495 case NI_GPCT_RELOAD_SOURCE_SWITCHING_BITS:
496 mode_reg_values |= Gi_Reload_Source_Switching_Bit;
497 break;
498 case NI_GPCT_RELOAD_SOURCE_GATE_SELECT_BITS:
499 input_select_bits |= Gi_Gate_Select_Load_Source_Bit;
500 mode_reg_mask |= Gi_Gating_Mode_Mask;
501 mode_reg_values |= Gi_Level_Gating_Bits;
502 break;
503 default:
504 break;
505 }
506 ni_tio_set_bits(counter, NITIO_Gi_Mode_Reg(counter->counter_index),
507 mode_reg_mask, mode_reg_values);
508
509 if (ni_tio_counting_mode_registers_present(counter_dev)) {
510 unsigned counting_mode_bits = 0;
511 counting_mode_bits |=
512 (mode >> NI_GPCT_COUNTING_MODE_SHIFT) &
513 Gi_Counting_Mode_Mask;
514 counting_mode_bits |=
515 ((mode >> NI_GPCT_INDEX_PHASE_BITSHIFT) <<
516 Gi_Index_Phase_Bitshift) & Gi_Index_Phase_Mask;
517 if (mode & NI_GPCT_INDEX_ENABLE_BIT)
518 counting_mode_bits |= Gi_Index_Mode_Bit;
519 ni_tio_set_bits(counter,
520 NITIO_Gi_Counting_Mode_Reg(counter->
521 counter_index),
522 Gi_Counting_Mode_Mask | Gi_Index_Phase_Mask |
523 Gi_Index_Mode_Bit, counting_mode_bits);
524 ni_tio_set_sync_mode(counter, 0);
525 }
526
527 ni_tio_set_bits(counter, NITIO_Gi_Command_Reg(counter->counter_index),
528 Gi_Up_Down_Mask,
529 (mode >> NI_GPCT_COUNTING_DIRECTION_SHIFT) <<
530 Gi_Up_Down_Shift);
531
532 if (mode & NI_GPCT_OR_GATE_BIT)
533 input_select_bits |= Gi_Or_Gate_Bit;
534 if (mode & NI_GPCT_INVERT_OUTPUT_BIT)
535 input_select_bits |= Gi_Output_Polarity_Bit;
536 ni_tio_set_bits(counter,
537 NITIO_Gi_Input_Select_Reg(counter->counter_index),
538 Gi_Gate_Select_Load_Source_Bit | Gi_Or_Gate_Bit |
539 Gi_Output_Polarity_Bit, input_select_bits);
540
541 return 0;
542 }
543
544 int ni_tio_arm(struct ni_gpct *counter, int arm, unsigned start_trigger)
545 {
546 struct ni_gpct_device *counter_dev = counter->counter_dev;
547
548 unsigned command_transient_bits = 0;
549
550 if (arm) {
551 switch (start_trigger) {
552 case NI_GPCT_ARM_IMMEDIATE:
553 command_transient_bits |= Gi_Arm_Bit;
554 break;
555 case NI_GPCT_ARM_PAIRED_IMMEDIATE:
556 command_transient_bits |= Gi_Arm_Bit | Gi_Arm_Copy_Bit;
557 break;
558 default:
559 break;
560 }
561 if (ni_tio_counting_mode_registers_present(counter_dev)) {
562 unsigned counting_mode_bits = 0;
563
564 switch (start_trigger) {
565 case NI_GPCT_ARM_IMMEDIATE:
566 case NI_GPCT_ARM_PAIRED_IMMEDIATE:
567 break;
568 default:
569 if (start_trigger & NI_GPCT_ARM_UNKNOWN) {
570 /* pass-through the least significant bits so we can figure out what select later */
571 unsigned hw_arm_select_bits =
572 (start_trigger <<
573 Gi_HW_Arm_Select_Shift) &
574 Gi_HW_Arm_Select_Mask
575 (counter_dev->variant);
576
577 counting_mode_bits |=
578 Gi_HW_Arm_Enable_Bit |
579 hw_arm_select_bits;
580 } else {
581 return -EINVAL;
582 }
583 break;
584 }
585 ni_tio_set_bits(counter,
586 NITIO_Gi_Counting_Mode_Reg
587 (counter->counter_index),
588 Gi_HW_Arm_Select_Mask
589 (counter_dev->variant) |
590 Gi_HW_Arm_Enable_Bit,
591 counting_mode_bits);
592 }
593 } else {
594 command_transient_bits |= Gi_Disarm_Bit;
595 }
596 ni_tio_set_bits_transient(counter,
597 NITIO_Gi_Command_Reg(counter->counter_index),
598 0, 0, command_transient_bits);
599 return 0;
600 }
601 EXPORT_SYMBOL_GPL(ni_tio_arm);
602
603 static unsigned ni_660x_source_select_bits(unsigned int clock_source)
604 {
605 unsigned ni_660x_clock;
606 unsigned i;
607 const unsigned clock_select_bits =
608 clock_source & NI_GPCT_CLOCK_SRC_SELECT_MASK;
609
610 switch (clock_select_bits) {
611 case NI_GPCT_TIMEBASE_1_CLOCK_SRC_BITS:
612 ni_660x_clock = NI_660x_Timebase_1_Clock;
613 break;
614 case NI_GPCT_TIMEBASE_2_CLOCK_SRC_BITS:
615 ni_660x_clock = NI_660x_Timebase_2_Clock;
616 break;
617 case NI_GPCT_TIMEBASE_3_CLOCK_SRC_BITS:
618 ni_660x_clock = NI_660x_Timebase_3_Clock;
619 break;
620 case NI_GPCT_LOGIC_LOW_CLOCK_SRC_BITS:
621 ni_660x_clock = NI_660x_Logic_Low_Clock;
622 break;
623 case NI_GPCT_SOURCE_PIN_i_CLOCK_SRC_BITS:
624 ni_660x_clock = NI_660x_Source_Pin_i_Clock;
625 break;
626 case NI_GPCT_NEXT_GATE_CLOCK_SRC_BITS:
627 ni_660x_clock = NI_660x_Next_Gate_Clock;
628 break;
629 case NI_GPCT_NEXT_TC_CLOCK_SRC_BITS:
630 ni_660x_clock = NI_660x_Next_TC_Clock;
631 break;
632 default:
633 for (i = 0; i <= ni_660x_max_rtsi_channel; ++i) {
634 if (clock_select_bits == NI_GPCT_RTSI_CLOCK_SRC_BITS(i)) {
635 ni_660x_clock = NI_660x_RTSI_Clock(i);
636 break;
637 }
638 }
639 if (i <= ni_660x_max_rtsi_channel)
640 break;
641 for (i = 0; i <= ni_660x_max_source_pin; ++i) {
642 if (clock_select_bits ==
643 NI_GPCT_SOURCE_PIN_CLOCK_SRC_BITS(i)) {
644 ni_660x_clock = NI_660x_Source_Pin_Clock(i);
645 break;
646 }
647 }
648 if (i <= ni_660x_max_source_pin)
649 break;
650 ni_660x_clock = 0;
651 BUG();
652 break;
653 }
654 return Gi_Source_Select_Bits(ni_660x_clock);
655 }
656
657 static unsigned ni_m_series_source_select_bits(unsigned int clock_source)
658 {
659 unsigned ni_m_series_clock;
660 unsigned i;
661 const unsigned clock_select_bits =
662 clock_source & NI_GPCT_CLOCK_SRC_SELECT_MASK;
663 switch (clock_select_bits) {
664 case NI_GPCT_TIMEBASE_1_CLOCK_SRC_BITS:
665 ni_m_series_clock = NI_M_Series_Timebase_1_Clock;
666 break;
667 case NI_GPCT_TIMEBASE_2_CLOCK_SRC_BITS:
668 ni_m_series_clock = NI_M_Series_Timebase_2_Clock;
669 break;
670 case NI_GPCT_TIMEBASE_3_CLOCK_SRC_BITS:
671 ni_m_series_clock = NI_M_Series_Timebase_3_Clock;
672 break;
673 case NI_GPCT_LOGIC_LOW_CLOCK_SRC_BITS:
674 ni_m_series_clock = NI_M_Series_Logic_Low_Clock;
675 break;
676 case NI_GPCT_NEXT_GATE_CLOCK_SRC_BITS:
677 ni_m_series_clock = NI_M_Series_Next_Gate_Clock;
678 break;
679 case NI_GPCT_NEXT_TC_CLOCK_SRC_BITS:
680 ni_m_series_clock = NI_M_Series_Next_TC_Clock;
681 break;
682 case NI_GPCT_PXI10_CLOCK_SRC_BITS:
683 ni_m_series_clock = NI_M_Series_PXI10_Clock;
684 break;
685 case NI_GPCT_PXI_STAR_TRIGGER_CLOCK_SRC_BITS:
686 ni_m_series_clock = NI_M_Series_PXI_Star_Trigger_Clock;
687 break;
688 case NI_GPCT_ANALOG_TRIGGER_OUT_CLOCK_SRC_BITS:
689 ni_m_series_clock = NI_M_Series_Analog_Trigger_Out_Clock;
690 break;
691 default:
692 for (i = 0; i <= ni_m_series_max_rtsi_channel; ++i) {
693 if (clock_select_bits == NI_GPCT_RTSI_CLOCK_SRC_BITS(i)) {
694 ni_m_series_clock = NI_M_Series_RTSI_Clock(i);
695 break;
696 }
697 }
698 if (i <= ni_m_series_max_rtsi_channel)
699 break;
700 for (i = 0; i <= ni_m_series_max_pfi_channel; ++i) {
701 if (clock_select_bits == NI_GPCT_PFI_CLOCK_SRC_BITS(i)) {
702 ni_m_series_clock = NI_M_Series_PFI_Clock(i);
703 break;
704 }
705 }
706 if (i <= ni_m_series_max_pfi_channel)
707 break;
708 printk(KERN_ERR "invalid clock source 0x%lx\n",
709 (unsigned long)clock_source);
710 BUG();
711 ni_m_series_clock = 0;
712 break;
713 }
714 return Gi_Source_Select_Bits(ni_m_series_clock);
715 };
716
717 static void ni_tio_set_source_subselect(struct ni_gpct *counter,
718 unsigned int clock_source)
719 {
720 struct ni_gpct_device *counter_dev = counter->counter_dev;
721 const unsigned second_gate_reg =
722 NITIO_Gi_Second_Gate_Reg(counter->counter_index);
723
724 if (counter_dev->variant != ni_gpct_variant_m_series)
725 return;
726 switch (clock_source & NI_GPCT_CLOCK_SRC_SELECT_MASK) {
727 /* Gi_Source_Subselect is zero */
728 case NI_GPCT_NEXT_GATE_CLOCK_SRC_BITS:
729 case NI_GPCT_TIMEBASE_3_CLOCK_SRC_BITS:
730 counter_dev->regs[second_gate_reg] &= ~Gi_Source_Subselect_Bit;
731 break;
732 /* Gi_Source_Subselect is one */
733 case NI_GPCT_ANALOG_TRIGGER_OUT_CLOCK_SRC_BITS:
734 case NI_GPCT_PXI_STAR_TRIGGER_CLOCK_SRC_BITS:
735 counter_dev->regs[second_gate_reg] |= Gi_Source_Subselect_Bit;
736 break;
737 /* Gi_Source_Subselect doesn't matter */
738 default:
739 return;
740 break;
741 }
742 write_register(counter, counter_dev->regs[second_gate_reg],
743 second_gate_reg);
744 }
745
746 static int ni_tio_set_clock_src(struct ni_gpct *counter,
747 unsigned int clock_source,
748 unsigned int period_ns)
749 {
750 struct ni_gpct_device *counter_dev = counter->counter_dev;
751 unsigned input_select_bits = 0;
752 static const uint64_t pico_per_nano = 1000;
753
754 /*FIXME: validate clock source */
755 switch (counter_dev->variant) {
756 case ni_gpct_variant_660x:
757 input_select_bits |= ni_660x_source_select_bits(clock_source);
758 break;
759 case ni_gpct_variant_e_series:
760 case ni_gpct_variant_m_series:
761 input_select_bits |=
762 ni_m_series_source_select_bits(clock_source);
763 break;
764 default:
765 BUG();
766 break;
767 }
768 if (clock_source & NI_GPCT_INVERT_CLOCK_SRC_BIT)
769 input_select_bits |= Gi_Source_Polarity_Bit;
770 ni_tio_set_bits(counter,
771 NITIO_Gi_Input_Select_Reg(counter->counter_index),
772 Gi_Source_Select_Mask | Gi_Source_Polarity_Bit,
773 input_select_bits);
774 ni_tio_set_source_subselect(counter, clock_source);
775 if (ni_tio_counting_mode_registers_present(counter_dev)) {
776 const unsigned prescaling_mode =
777 clock_source & NI_GPCT_PRESCALE_MODE_CLOCK_SRC_MASK;
778 unsigned counting_mode_bits = 0;
779
780 switch (prescaling_mode) {
781 case NI_GPCT_NO_PRESCALE_CLOCK_SRC_BITS:
782 break;
783 case NI_GPCT_PRESCALE_X2_CLOCK_SRC_BITS:
784 counting_mode_bits |=
785 Gi_Prescale_X2_Bit(counter_dev->variant);
786 break;
787 case NI_GPCT_PRESCALE_X8_CLOCK_SRC_BITS:
788 counting_mode_bits |=
789 Gi_Prescale_X8_Bit(counter_dev->variant);
790 break;
791 default:
792 return -EINVAL;
793 break;
794 }
795 ni_tio_set_bits(counter,
796 NITIO_Gi_Counting_Mode_Reg(counter->
797 counter_index),
798 Gi_Prescale_X2_Bit(counter_dev->variant) |
799 Gi_Prescale_X8_Bit(counter_dev->variant),
800 counting_mode_bits);
801 }
802 counter->clock_period_ps = pico_per_nano * period_ns;
803 ni_tio_set_sync_mode(counter, 0);
804 return 0;
805 }
806
807 static unsigned ni_tio_clock_src_modifiers(const struct ni_gpct *counter)
808 {
809 struct ni_gpct_device *counter_dev = counter->counter_dev;
810 const unsigned counting_mode_bits = ni_tio_get_soft_copy(counter,
811 NITIO_Gi_Counting_Mode_Reg
812 (counter->
813 counter_index));
814 unsigned bits = 0;
815
816 if (ni_tio_get_soft_copy(counter,
817 NITIO_Gi_Input_Select_Reg
818 (counter->counter_index)) &
819 Gi_Source_Polarity_Bit)
820 bits |= NI_GPCT_INVERT_CLOCK_SRC_BIT;
821 if (counting_mode_bits & Gi_Prescale_X2_Bit(counter_dev->variant))
822 bits |= NI_GPCT_PRESCALE_X2_CLOCK_SRC_BITS;
823 if (counting_mode_bits & Gi_Prescale_X8_Bit(counter_dev->variant))
824 bits |= NI_GPCT_PRESCALE_X8_CLOCK_SRC_BITS;
825 return bits;
826 }
827
828 static unsigned ni_m_series_clock_src_select(const struct ni_gpct *counter)
829 {
830 struct ni_gpct_device *counter_dev = counter->counter_dev;
831 const unsigned second_gate_reg =
832 NITIO_Gi_Second_Gate_Reg(counter->counter_index);
833 unsigned clock_source = 0;
834 unsigned i;
835 const unsigned input_select = (ni_tio_get_soft_copy(counter,
836 NITIO_Gi_Input_Select_Reg
837 (counter->counter_index))
838 & Gi_Source_Select_Mask) >>
839 Gi_Source_Select_Shift;
840
841 switch (input_select) {
842 case NI_M_Series_Timebase_1_Clock:
843 clock_source = NI_GPCT_TIMEBASE_1_CLOCK_SRC_BITS;
844 break;
845 case NI_M_Series_Timebase_2_Clock:
846 clock_source = NI_GPCT_TIMEBASE_2_CLOCK_SRC_BITS;
847 break;
848 case NI_M_Series_Timebase_3_Clock:
849 if (counter_dev->regs[second_gate_reg] &
850 Gi_Source_Subselect_Bit)
851 clock_source =
852 NI_GPCT_ANALOG_TRIGGER_OUT_CLOCK_SRC_BITS;
853 else
854 clock_source = NI_GPCT_TIMEBASE_3_CLOCK_SRC_BITS;
855 break;
856 case NI_M_Series_Logic_Low_Clock:
857 clock_source = NI_GPCT_LOGIC_LOW_CLOCK_SRC_BITS;
858 break;
859 case NI_M_Series_Next_Gate_Clock:
860 if (counter_dev->regs[second_gate_reg] &
861 Gi_Source_Subselect_Bit)
862 clock_source = NI_GPCT_PXI_STAR_TRIGGER_CLOCK_SRC_BITS;
863 else
864 clock_source = NI_GPCT_NEXT_GATE_CLOCK_SRC_BITS;
865 break;
866 case NI_M_Series_PXI10_Clock:
867 clock_source = NI_GPCT_PXI10_CLOCK_SRC_BITS;
868 break;
869 case NI_M_Series_Next_TC_Clock:
870 clock_source = NI_GPCT_NEXT_TC_CLOCK_SRC_BITS;
871 break;
872 default:
873 for (i = 0; i <= ni_m_series_max_rtsi_channel; ++i) {
874 if (input_select == NI_M_Series_RTSI_Clock(i)) {
875 clock_source = NI_GPCT_RTSI_CLOCK_SRC_BITS(i);
876 break;
877 }
878 }
879 if (i <= ni_m_series_max_rtsi_channel)
880 break;
881 for (i = 0; i <= ni_m_series_max_pfi_channel; ++i) {
882 if (input_select == NI_M_Series_PFI_Clock(i)) {
883 clock_source = NI_GPCT_PFI_CLOCK_SRC_BITS(i);
884 break;
885 }
886 }
887 if (i <= ni_m_series_max_pfi_channel)
888 break;
889 BUG();
890 break;
891 }
892 clock_source |= ni_tio_clock_src_modifiers(counter);
893 return clock_source;
894 }
895
896 static unsigned ni_660x_clock_src_select(const struct ni_gpct *counter)
897 {
898 unsigned clock_source = 0;
899 unsigned i;
900 const unsigned input_select = (ni_tio_get_soft_copy(counter,
901 NITIO_Gi_Input_Select_Reg
902 (counter->counter_index))
903 & Gi_Source_Select_Mask) >>
904 Gi_Source_Select_Shift;
905
906 switch (input_select) {
907 case NI_660x_Timebase_1_Clock:
908 clock_source = NI_GPCT_TIMEBASE_1_CLOCK_SRC_BITS;
909 break;
910 case NI_660x_Timebase_2_Clock:
911 clock_source = NI_GPCT_TIMEBASE_2_CLOCK_SRC_BITS;
912 break;
913 case NI_660x_Timebase_3_Clock:
914 clock_source = NI_GPCT_TIMEBASE_3_CLOCK_SRC_BITS;
915 break;
916 case NI_660x_Logic_Low_Clock:
917 clock_source = NI_GPCT_LOGIC_LOW_CLOCK_SRC_BITS;
918 break;
919 case NI_660x_Source_Pin_i_Clock:
920 clock_source = NI_GPCT_SOURCE_PIN_i_CLOCK_SRC_BITS;
921 break;
922 case NI_660x_Next_Gate_Clock:
923 clock_source = NI_GPCT_NEXT_GATE_CLOCK_SRC_BITS;
924 break;
925 case NI_660x_Next_TC_Clock:
926 clock_source = NI_GPCT_NEXT_TC_CLOCK_SRC_BITS;
927 break;
928 default:
929 for (i = 0; i <= ni_660x_max_rtsi_channel; ++i) {
930 if (input_select == NI_660x_RTSI_Clock(i)) {
931 clock_source = NI_GPCT_RTSI_CLOCK_SRC_BITS(i);
932 break;
933 }
934 }
935 if (i <= ni_660x_max_rtsi_channel)
936 break;
937 for (i = 0; i <= ni_660x_max_source_pin; ++i) {
938 if (input_select == NI_660x_Source_Pin_Clock(i)) {
939 clock_source =
940 NI_GPCT_SOURCE_PIN_CLOCK_SRC_BITS(i);
941 break;
942 }
943 }
944 if (i <= ni_660x_max_source_pin)
945 break;
946 BUG();
947 break;
948 }
949 clock_source |= ni_tio_clock_src_modifiers(counter);
950 return clock_source;
951 }
952
953 static unsigned ni_tio_generic_clock_src_select(const struct ni_gpct *counter)
954 {
955 switch (counter->counter_dev->variant) {
956 case ni_gpct_variant_e_series:
957 case ni_gpct_variant_m_series:
958 return ni_m_series_clock_src_select(counter);
959 break;
960 case ni_gpct_variant_660x:
961 return ni_660x_clock_src_select(counter);
962 break;
963 default:
964 BUG();
965 break;
966 }
967 return 0;
968 }
969
970 static uint64_t ni_tio_clock_period_ps(const struct ni_gpct *counter,
971 unsigned generic_clock_source)
972 {
973 uint64_t clock_period_ps;
974
975 switch (generic_clock_source & NI_GPCT_CLOCK_SRC_SELECT_MASK) {
976 case NI_GPCT_TIMEBASE_1_CLOCK_SRC_BITS:
977 clock_period_ps = 50000;
978 break;
979 case NI_GPCT_TIMEBASE_2_CLOCK_SRC_BITS:
980 clock_period_ps = 10000000;
981 break;
982 case NI_GPCT_TIMEBASE_3_CLOCK_SRC_BITS:
983 clock_period_ps = 12500;
984 break;
985 case NI_GPCT_PXI10_CLOCK_SRC_BITS:
986 clock_period_ps = 100000;
987 break;
988 default:
989 /* clock period is specified by user with prescaling already taken into account. */
990 return counter->clock_period_ps;
991 break;
992 }
993
994 switch (generic_clock_source & NI_GPCT_PRESCALE_MODE_CLOCK_SRC_MASK) {
995 case NI_GPCT_NO_PRESCALE_CLOCK_SRC_BITS:
996 break;
997 case NI_GPCT_PRESCALE_X2_CLOCK_SRC_BITS:
998 clock_period_ps *= 2;
999 break;
1000 case NI_GPCT_PRESCALE_X8_CLOCK_SRC_BITS:
1001 clock_period_ps *= 8;
1002 break;
1003 default:
1004 BUG();
1005 break;
1006 }
1007 return clock_period_ps;
1008 }
1009
1010 static void ni_tio_get_clock_src(struct ni_gpct *counter,
1011 unsigned int *clock_source,
1012 unsigned int *period_ns)
1013 {
1014 static const unsigned pico_per_nano = 1000;
1015 uint64_t temp64;
1016 *clock_source = ni_tio_generic_clock_src_select(counter);
1017 temp64 = ni_tio_clock_period_ps(counter, *clock_source);
1018 do_div(temp64, pico_per_nano);
1019 *period_ns = temp64;
1020 }
1021
1022 static void ni_tio_set_first_gate_modifiers(struct ni_gpct *counter,
1023 unsigned int gate_source)
1024 {
1025 const unsigned mode_mask = Gi_Gate_Polarity_Bit | Gi_Gating_Mode_Mask;
1026 unsigned mode_values = 0;
1027
1028 if (gate_source & CR_INVERT)
1029 mode_values |= Gi_Gate_Polarity_Bit;
1030 if (gate_source & CR_EDGE)
1031 mode_values |= Gi_Rising_Edge_Gating_Bits;
1032 else
1033 mode_values |= Gi_Level_Gating_Bits;
1034 ni_tio_set_bits(counter, NITIO_Gi_Mode_Reg(counter->counter_index),
1035 mode_mask, mode_values);
1036 }
1037
1038 static int ni_660x_set_first_gate(struct ni_gpct *counter,
1039 unsigned int gate_source)
1040 {
1041 const unsigned selected_gate = CR_CHAN(gate_source);
1042 /* bits of selected_gate that may be meaningful to input select register */
1043 const unsigned selected_gate_mask = 0x1f;
1044 unsigned ni_660x_gate_select;
1045 unsigned i;
1046
1047 switch (selected_gate) {
1048 case NI_GPCT_NEXT_SOURCE_GATE_SELECT:
1049 ni_660x_gate_select = NI_660x_Next_SRC_Gate_Select;
1050 break;
1051 case NI_GPCT_NEXT_OUT_GATE_SELECT:
1052 case NI_GPCT_LOGIC_LOW_GATE_SELECT:
1053 case NI_GPCT_SOURCE_PIN_i_GATE_SELECT:
1054 case NI_GPCT_GATE_PIN_i_GATE_SELECT:
1055 ni_660x_gate_select = selected_gate & selected_gate_mask;
1056 break;
1057 default:
1058 for (i = 0; i <= ni_660x_max_rtsi_channel; ++i) {
1059 if (selected_gate == NI_GPCT_RTSI_GATE_SELECT(i)) {
1060 ni_660x_gate_select =
1061 selected_gate & selected_gate_mask;
1062 break;
1063 }
1064 }
1065 if (i <= ni_660x_max_rtsi_channel)
1066 break;
1067 for (i = 0; i <= ni_660x_max_gate_pin; ++i) {
1068 if (selected_gate == NI_GPCT_GATE_PIN_GATE_SELECT(i)) {
1069 ni_660x_gate_select =
1070 selected_gate & selected_gate_mask;
1071 break;
1072 }
1073 }
1074 if (i <= ni_660x_max_gate_pin)
1075 break;
1076 return -EINVAL;
1077 break;
1078 }
1079 ni_tio_set_bits(counter,
1080 NITIO_Gi_Input_Select_Reg(counter->counter_index),
1081 Gi_Gate_Select_Mask,
1082 Gi_Gate_Select_Bits(ni_660x_gate_select));
1083 return 0;
1084 }
1085
1086 static int ni_m_series_set_first_gate(struct ni_gpct *counter,
1087 unsigned int gate_source)
1088 {
1089 const unsigned selected_gate = CR_CHAN(gate_source);
1090 /* bits of selected_gate that may be meaningful to input select register */
1091 const unsigned selected_gate_mask = 0x1f;
1092 unsigned ni_m_series_gate_select;
1093 unsigned i;
1094
1095 switch (selected_gate) {
1096 case NI_GPCT_TIMESTAMP_MUX_GATE_SELECT:
1097 case NI_GPCT_AI_START2_GATE_SELECT:
1098 case NI_GPCT_PXI_STAR_TRIGGER_GATE_SELECT:
1099 case NI_GPCT_NEXT_OUT_GATE_SELECT:
1100 case NI_GPCT_AI_START1_GATE_SELECT:
1101 case NI_GPCT_NEXT_SOURCE_GATE_SELECT:
1102 case NI_GPCT_ANALOG_TRIGGER_OUT_GATE_SELECT:
1103 case NI_GPCT_LOGIC_LOW_GATE_SELECT:
1104 ni_m_series_gate_select = selected_gate & selected_gate_mask;
1105 break;
1106 default:
1107 for (i = 0; i <= ni_m_series_max_rtsi_channel; ++i) {
1108 if (selected_gate == NI_GPCT_RTSI_GATE_SELECT(i)) {
1109 ni_m_series_gate_select =
1110 selected_gate & selected_gate_mask;
1111 break;
1112 }
1113 }
1114 if (i <= ni_m_series_max_rtsi_channel)
1115 break;
1116 for (i = 0; i <= ni_m_series_max_pfi_channel; ++i) {
1117 if (selected_gate == NI_GPCT_PFI_GATE_SELECT(i)) {
1118 ni_m_series_gate_select =
1119 selected_gate & selected_gate_mask;
1120 break;
1121 }
1122 }
1123 if (i <= ni_m_series_max_pfi_channel)
1124 break;
1125 return -EINVAL;
1126 break;
1127 }
1128 ni_tio_set_bits(counter,
1129 NITIO_Gi_Input_Select_Reg(counter->counter_index),
1130 Gi_Gate_Select_Mask,
1131 Gi_Gate_Select_Bits(ni_m_series_gate_select));
1132 return 0;
1133 }
1134
1135 static int ni_660x_set_second_gate(struct ni_gpct *counter,
1136 unsigned int gate_source)
1137 {
1138 struct ni_gpct_device *counter_dev = counter->counter_dev;
1139 const unsigned second_gate_reg =
1140 NITIO_Gi_Second_Gate_Reg(counter->counter_index);
1141 const unsigned selected_second_gate = CR_CHAN(gate_source);
1142 /* bits of second_gate that may be meaningful to second gate register */
1143 static const unsigned selected_second_gate_mask = 0x1f;
1144 unsigned ni_660x_second_gate_select;
1145 unsigned i;
1146
1147 switch (selected_second_gate) {
1148 case NI_GPCT_SOURCE_PIN_i_GATE_SELECT:
1149 case NI_GPCT_UP_DOWN_PIN_i_GATE_SELECT:
1150 case NI_GPCT_SELECTED_GATE_GATE_SELECT:
1151 case NI_GPCT_NEXT_OUT_GATE_SELECT:
1152 case NI_GPCT_LOGIC_LOW_GATE_SELECT:
1153 ni_660x_second_gate_select =
1154 selected_second_gate & selected_second_gate_mask;
1155 break;
1156 case NI_GPCT_NEXT_SOURCE_GATE_SELECT:
1157 ni_660x_second_gate_select =
1158 NI_660x_Next_SRC_Second_Gate_Select;
1159 break;
1160 default:
1161 for (i = 0; i <= ni_660x_max_rtsi_channel; ++i) {
1162 if (selected_second_gate == NI_GPCT_RTSI_GATE_SELECT(i)) {
1163 ni_660x_second_gate_select =
1164 selected_second_gate &
1165 selected_second_gate_mask;
1166 break;
1167 }
1168 }
1169 if (i <= ni_660x_max_rtsi_channel)
1170 break;
1171 for (i = 0; i <= ni_660x_max_up_down_pin; ++i) {
1172 if (selected_second_gate ==
1173 NI_GPCT_UP_DOWN_PIN_GATE_SELECT(i)) {
1174 ni_660x_second_gate_select =
1175 selected_second_gate &
1176 selected_second_gate_mask;
1177 break;
1178 }
1179 }
1180 if (i <= ni_660x_max_up_down_pin)
1181 break;
1182 return -EINVAL;
1183 break;
1184 };
1185 counter_dev->regs[second_gate_reg] |= Gi_Second_Gate_Mode_Bit;
1186 counter_dev->regs[second_gate_reg] &= ~Gi_Second_Gate_Select_Mask;
1187 counter_dev->regs[second_gate_reg] |=
1188 Gi_Second_Gate_Select_Bits(ni_660x_second_gate_select);
1189 write_register(counter, counter_dev->regs[second_gate_reg],
1190 second_gate_reg);
1191 return 0;
1192 }
1193
1194 static int ni_m_series_set_second_gate(struct ni_gpct *counter,
1195 unsigned int gate_source)
1196 {
1197 struct ni_gpct_device *counter_dev = counter->counter_dev;
1198 const unsigned second_gate_reg =
1199 NITIO_Gi_Second_Gate_Reg(counter->counter_index);
1200 const unsigned selected_second_gate = CR_CHAN(gate_source);
1201 /* bits of second_gate that may be meaningful to second gate register */
1202 static const unsigned selected_second_gate_mask = 0x1f;
1203 unsigned ni_m_series_second_gate_select;
1204
1205 /* FIXME: We don't know what the m-series second gate codes are, so we'll just pass
1206 the bits through for now. */
1207 switch (selected_second_gate) {
1208 default:
1209 ni_m_series_second_gate_select =
1210 selected_second_gate & selected_second_gate_mask;
1211 break;
1212 };
1213 counter_dev->regs[second_gate_reg] |= Gi_Second_Gate_Mode_Bit;
1214 counter_dev->regs[second_gate_reg] &= ~Gi_Second_Gate_Select_Mask;
1215 counter_dev->regs[second_gate_reg] |=
1216 Gi_Second_Gate_Select_Bits(ni_m_series_second_gate_select);
1217 write_register(counter, counter_dev->regs[second_gate_reg],
1218 second_gate_reg);
1219 return 0;
1220 }
1221
1222 int ni_tio_set_gate_src(struct ni_gpct *counter, unsigned gate_index,
1223 unsigned int gate_source)
1224 {
1225 struct ni_gpct_device *counter_dev = counter->counter_dev;
1226 const unsigned second_gate_reg =
1227 NITIO_Gi_Second_Gate_Reg(counter->counter_index);
1228
1229 switch (gate_index) {
1230 case 0:
1231 if (CR_CHAN(gate_source) == NI_GPCT_DISABLED_GATE_SELECT) {
1232 ni_tio_set_bits(counter,
1233 NITIO_Gi_Mode_Reg(counter->
1234 counter_index),
1235 Gi_Gating_Mode_Mask,
1236 Gi_Gating_Disabled_Bits);
1237 return 0;
1238 }
1239 ni_tio_set_first_gate_modifiers(counter, gate_source);
1240 switch (counter_dev->variant) {
1241 case ni_gpct_variant_e_series:
1242 case ni_gpct_variant_m_series:
1243 return ni_m_series_set_first_gate(counter, gate_source);
1244 break;
1245 case ni_gpct_variant_660x:
1246 return ni_660x_set_first_gate(counter, gate_source);
1247 break;
1248 default:
1249 BUG();
1250 break;
1251 }
1252 break;
1253 case 1:
1254 if (ni_tio_second_gate_registers_present(counter_dev) == 0)
1255 return -EINVAL;
1256 if (CR_CHAN(gate_source) == NI_GPCT_DISABLED_GATE_SELECT) {
1257 counter_dev->regs[second_gate_reg] &=
1258 ~Gi_Second_Gate_Mode_Bit;
1259 write_register(counter,
1260 counter_dev->regs[second_gate_reg],
1261 second_gate_reg);
1262 return 0;
1263 }
1264 if (gate_source & CR_INVERT) {
1265 counter_dev->regs[second_gate_reg] |=
1266 Gi_Second_Gate_Polarity_Bit;
1267 } else {
1268 counter_dev->regs[second_gate_reg] &=
1269 ~Gi_Second_Gate_Polarity_Bit;
1270 }
1271 switch (counter_dev->variant) {
1272 case ni_gpct_variant_m_series:
1273 return ni_m_series_set_second_gate(counter,
1274 gate_source);
1275 break;
1276 case ni_gpct_variant_660x:
1277 return ni_660x_set_second_gate(counter, gate_source);
1278 break;
1279 default:
1280 BUG();
1281 break;
1282 }
1283 break;
1284 default:
1285 return -EINVAL;
1286 break;
1287 }
1288 return 0;
1289 }
1290 EXPORT_SYMBOL_GPL(ni_tio_set_gate_src);
1291
1292 static int ni_tio_set_other_src(struct ni_gpct *counter, unsigned index,
1293 unsigned int source)
1294 {
1295 struct ni_gpct_device *counter_dev = counter->counter_dev;
1296
1297 if (counter_dev->variant == ni_gpct_variant_m_series) {
1298 unsigned int abz_reg, shift, mask;
1299
1300 abz_reg = NITIO_Gi_ABZ_Reg(counter->counter_index);
1301 switch (index) {
1302 case NI_GPCT_SOURCE_ENCODER_A:
1303 shift = 10;
1304 break;
1305 case NI_GPCT_SOURCE_ENCODER_B:
1306 shift = 5;
1307 break;
1308 case NI_GPCT_SOURCE_ENCODER_Z:
1309 shift = 0;
1310 break;
1311 default:
1312 return -EINVAL;
1313 break;
1314 }
1315 mask = 0x1f << shift;
1316 if (source > 0x1f) {
1317 /* Disable gate */
1318 source = 0x1f;
1319 }
1320 counter_dev->regs[abz_reg] &= ~mask;
1321 counter_dev->regs[abz_reg] |= (source << shift) & mask;
1322 write_register(counter, counter_dev->regs[abz_reg], abz_reg);
1323 /* printk("%s %x %d %d\n", __func__, counter_dev->regs[abz_reg], index, source); */
1324 return 0;
1325 }
1326 return -EINVAL;
1327 }
1328
1329 static unsigned ni_660x_first_gate_to_generic_gate_source(unsigned
1330 ni_660x_gate_select)
1331 {
1332 unsigned i;
1333
1334 switch (ni_660x_gate_select) {
1335 case NI_660x_Source_Pin_i_Gate_Select:
1336 return NI_GPCT_SOURCE_PIN_i_GATE_SELECT;
1337 break;
1338 case NI_660x_Gate_Pin_i_Gate_Select:
1339 return NI_GPCT_GATE_PIN_i_GATE_SELECT;
1340 break;
1341 case NI_660x_Next_SRC_Gate_Select:
1342 return NI_GPCT_NEXT_SOURCE_GATE_SELECT;
1343 break;
1344 case NI_660x_Next_Out_Gate_Select:
1345 return NI_GPCT_NEXT_OUT_GATE_SELECT;
1346 break;
1347 case NI_660x_Logic_Low_Gate_Select:
1348 return NI_GPCT_LOGIC_LOW_GATE_SELECT;
1349 break;
1350 default:
1351 for (i = 0; i <= ni_660x_max_rtsi_channel; ++i) {
1352 if (ni_660x_gate_select == NI_660x_RTSI_Gate_Select(i)) {
1353 return NI_GPCT_RTSI_GATE_SELECT(i);
1354 break;
1355 }
1356 }
1357 if (i <= ni_660x_max_rtsi_channel)
1358 break;
1359 for (i = 0; i <= ni_660x_max_gate_pin; ++i) {
1360 if (ni_660x_gate_select ==
1361 NI_660x_Gate_Pin_Gate_Select(i)) {
1362 return NI_GPCT_GATE_PIN_GATE_SELECT(i);
1363 break;
1364 }
1365 }
1366 if (i <= ni_660x_max_gate_pin)
1367 break;
1368 BUG();
1369 break;
1370 }
1371 return 0;
1372 };
1373
1374 static unsigned ni_m_series_first_gate_to_generic_gate_source(unsigned
1375 ni_m_series_gate_select)
1376 {
1377 unsigned i;
1378
1379 switch (ni_m_series_gate_select) {
1380 case NI_M_Series_Timestamp_Mux_Gate_Select:
1381 return NI_GPCT_TIMESTAMP_MUX_GATE_SELECT;
1382 break;
1383 case NI_M_Series_AI_START2_Gate_Select:
1384 return NI_GPCT_AI_START2_GATE_SELECT;
1385 break;
1386 case NI_M_Series_PXI_Star_Trigger_Gate_Select:
1387 return NI_GPCT_PXI_STAR_TRIGGER_GATE_SELECT;
1388 break;
1389 case NI_M_Series_Next_Out_Gate_Select:
1390 return NI_GPCT_NEXT_OUT_GATE_SELECT;
1391 break;
1392 case NI_M_Series_AI_START1_Gate_Select:
1393 return NI_GPCT_AI_START1_GATE_SELECT;
1394 break;
1395 case NI_M_Series_Next_SRC_Gate_Select:
1396 return NI_GPCT_NEXT_SOURCE_GATE_SELECT;
1397 break;
1398 case NI_M_Series_Analog_Trigger_Out_Gate_Select:
1399 return NI_GPCT_ANALOG_TRIGGER_OUT_GATE_SELECT;
1400 break;
1401 case NI_M_Series_Logic_Low_Gate_Select:
1402 return NI_GPCT_LOGIC_LOW_GATE_SELECT;
1403 break;
1404 default:
1405 for (i = 0; i <= ni_m_series_max_rtsi_channel; ++i) {
1406 if (ni_m_series_gate_select ==
1407 NI_M_Series_RTSI_Gate_Select(i)) {
1408 return NI_GPCT_RTSI_GATE_SELECT(i);
1409 break;
1410 }
1411 }
1412 if (i <= ni_m_series_max_rtsi_channel)
1413 break;
1414 for (i = 0; i <= ni_m_series_max_pfi_channel; ++i) {
1415 if (ni_m_series_gate_select ==
1416 NI_M_Series_PFI_Gate_Select(i)) {
1417 return NI_GPCT_PFI_GATE_SELECT(i);
1418 break;
1419 }
1420 }
1421 if (i <= ni_m_series_max_pfi_channel)
1422 break;
1423 BUG();
1424 break;
1425 }
1426 return 0;
1427 };
1428
1429 static unsigned ni_660x_second_gate_to_generic_gate_source(unsigned
1430 ni_660x_gate_select)
1431 {
1432 unsigned i;
1433
1434 switch (ni_660x_gate_select) {
1435 case NI_660x_Source_Pin_i_Second_Gate_Select:
1436 return NI_GPCT_SOURCE_PIN_i_GATE_SELECT;
1437 break;
1438 case NI_660x_Up_Down_Pin_i_Second_Gate_Select:
1439 return NI_GPCT_UP_DOWN_PIN_i_GATE_SELECT;
1440 break;
1441 case NI_660x_Next_SRC_Second_Gate_Select:
1442 return NI_GPCT_NEXT_SOURCE_GATE_SELECT;
1443 break;
1444 case NI_660x_Next_Out_Second_Gate_Select:
1445 return NI_GPCT_NEXT_OUT_GATE_SELECT;
1446 break;
1447 case NI_660x_Selected_Gate_Second_Gate_Select:
1448 return NI_GPCT_SELECTED_GATE_GATE_SELECT;
1449 break;
1450 case NI_660x_Logic_Low_Second_Gate_Select:
1451 return NI_GPCT_LOGIC_LOW_GATE_SELECT;
1452 break;
1453 default:
1454 for (i = 0; i <= ni_660x_max_rtsi_channel; ++i) {
1455 if (ni_660x_gate_select ==
1456 NI_660x_RTSI_Second_Gate_Select(i)) {
1457 return NI_GPCT_RTSI_GATE_SELECT(i);
1458 break;
1459 }
1460 }
1461 if (i <= ni_660x_max_rtsi_channel)
1462 break;
1463 for (i = 0; i <= ni_660x_max_up_down_pin; ++i) {
1464 if (ni_660x_gate_select ==
1465 NI_660x_Up_Down_Pin_Second_Gate_Select(i)) {
1466 return NI_GPCT_UP_DOWN_PIN_GATE_SELECT(i);
1467 break;
1468 }
1469 }
1470 if (i <= ni_660x_max_up_down_pin)
1471 break;
1472 BUG();
1473 break;
1474 }
1475 return 0;
1476 };
1477
1478 static unsigned ni_m_series_second_gate_to_generic_gate_source(unsigned
1479 ni_m_series_gate_select)
1480 {
1481 /*FIXME: the second gate sources for the m series are undocumented, so we just return
1482 * the raw bits for now. */
1483 switch (ni_m_series_gate_select) {
1484 default:
1485 return ni_m_series_gate_select;
1486 break;
1487 }
1488 return 0;
1489 };
1490
1491 static int ni_tio_get_gate_src(struct ni_gpct *counter, unsigned gate_index,
1492 unsigned int *gate_source)
1493 {
1494 struct ni_gpct_device *counter_dev = counter->counter_dev;
1495 const unsigned mode_bits = ni_tio_get_soft_copy(counter,
1496 NITIO_Gi_Mode_Reg
1497 (counter->
1498 counter_index));
1499 const unsigned second_gate_reg =
1500 NITIO_Gi_Second_Gate_Reg(counter->counter_index);
1501 unsigned gate_select_bits;
1502
1503 switch (gate_index) {
1504 case 0:
1505 if ((mode_bits & Gi_Gating_Mode_Mask) ==
1506 Gi_Gating_Disabled_Bits) {
1507 *gate_source = NI_GPCT_DISABLED_GATE_SELECT;
1508 return 0;
1509 } else {
1510 gate_select_bits =
1511 (ni_tio_get_soft_copy(counter,
1512 NITIO_Gi_Input_Select_Reg
1513 (counter->counter_index)) &
1514 Gi_Gate_Select_Mask) >> Gi_Gate_Select_Shift;
1515 }
1516 switch (counter_dev->variant) {
1517 case ni_gpct_variant_e_series:
1518 case ni_gpct_variant_m_series:
1519 *gate_source =
1520 ni_m_series_first_gate_to_generic_gate_source
1521 (gate_select_bits);
1522 break;
1523 case ni_gpct_variant_660x:
1524 *gate_source =
1525 ni_660x_first_gate_to_generic_gate_source
1526 (gate_select_bits);
1527 break;
1528 default:
1529 BUG();
1530 break;
1531 }
1532 if (mode_bits & Gi_Gate_Polarity_Bit)
1533 *gate_source |= CR_INVERT;
1534 if ((mode_bits & Gi_Gating_Mode_Mask) != Gi_Level_Gating_Bits)
1535 *gate_source |= CR_EDGE;
1536 break;
1537 case 1:
1538 if ((mode_bits & Gi_Gating_Mode_Mask) == Gi_Gating_Disabled_Bits
1539 || (counter_dev->regs[second_gate_reg] &
1540 Gi_Second_Gate_Mode_Bit)
1541 == 0) {
1542 *gate_source = NI_GPCT_DISABLED_GATE_SELECT;
1543 return 0;
1544 } else {
1545 gate_select_bits =
1546 (counter_dev->regs[second_gate_reg] &
1547 Gi_Second_Gate_Select_Mask) >>
1548 Gi_Second_Gate_Select_Shift;
1549 }
1550 switch (counter_dev->variant) {
1551 case ni_gpct_variant_e_series:
1552 case ni_gpct_variant_m_series:
1553 *gate_source =
1554 ni_m_series_second_gate_to_generic_gate_source
1555 (gate_select_bits);
1556 break;
1557 case ni_gpct_variant_660x:
1558 *gate_source =
1559 ni_660x_second_gate_to_generic_gate_source
1560 (gate_select_bits);
1561 break;
1562 default:
1563 BUG();
1564 break;
1565 }
1566 if (counter_dev->regs[second_gate_reg] &
1567 Gi_Second_Gate_Polarity_Bit) {
1568 *gate_source |= CR_INVERT;
1569 }
1570 /* second gate can't have edge/level mode set independently */
1571 if ((mode_bits & Gi_Gating_Mode_Mask) != Gi_Level_Gating_Bits)
1572 *gate_source |= CR_EDGE;
1573 break;
1574 default:
1575 return -EINVAL;
1576 break;
1577 }
1578 return 0;
1579 }
1580
1581 int ni_tio_insn_config(struct ni_gpct *counter,
1582 struct comedi_insn *insn, unsigned int *data)
1583 {
1584 switch (data[0]) {
1585 case INSN_CONFIG_SET_COUNTER_MODE:
1586 return ni_tio_set_counter_mode(counter, data[1]);
1587 break;
1588 case INSN_CONFIG_ARM:
1589 return ni_tio_arm(counter, 1, data[1]);
1590 break;
1591 case INSN_CONFIG_DISARM:
1592 ni_tio_arm(counter, 0, 0);
1593 return 0;
1594 break;
1595 case INSN_CONFIG_GET_COUNTER_STATUS:
1596 data[1] = ni_tio_counter_status(counter);
1597 data[2] = counter_status_mask;
1598 return 0;
1599 break;
1600 case INSN_CONFIG_SET_CLOCK_SRC:
1601 return ni_tio_set_clock_src(counter, data[1], data[2]);
1602 break;
1603 case INSN_CONFIG_GET_CLOCK_SRC:
1604 ni_tio_get_clock_src(counter, &data[1], &data[2]);
1605 return 0;
1606 break;
1607 case INSN_CONFIG_SET_GATE_SRC:
1608 return ni_tio_set_gate_src(counter, data[1], data[2]);
1609 break;
1610 case INSN_CONFIG_GET_GATE_SRC:
1611 return ni_tio_get_gate_src(counter, data[1], &data[2]);
1612 break;
1613 case INSN_CONFIG_SET_OTHER_SRC:
1614 return ni_tio_set_other_src(counter, data[1], data[2]);
1615 break;
1616 case INSN_CONFIG_RESET:
1617 ni_tio_reset_count_and_disarm(counter);
1618 return 0;
1619 break;
1620 default:
1621 break;
1622 }
1623 return -EINVAL;
1624 }
1625 EXPORT_SYMBOL_GPL(ni_tio_insn_config);
1626
1627 int ni_tio_rinsn(struct ni_gpct *counter, struct comedi_insn *insn,
1628 unsigned int *data)
1629 {
1630 struct ni_gpct_device *counter_dev = counter->counter_dev;
1631 const unsigned channel = CR_CHAN(insn->chanspec);
1632 unsigned first_read;
1633 unsigned second_read;
1634 unsigned correct_read;
1635
1636 if (insn->n < 1)
1637 return 0;
1638 switch (channel) {
1639 case 0:
1640 ni_tio_set_bits(counter,
1641 NITIO_Gi_Command_Reg(counter->counter_index),
1642 Gi_Save_Trace_Bit, 0);
1643 ni_tio_set_bits(counter,
1644 NITIO_Gi_Command_Reg(counter->counter_index),
1645 Gi_Save_Trace_Bit, Gi_Save_Trace_Bit);
1646 /* The count doesn't get latched until the next clock edge, so it is possible the count
1647 may change (once) while we are reading. Since the read of the SW_Save_Reg isn't
1648 atomic (apparently even when it's a 32 bit register according to 660x docs),
1649 we need to read twice and make sure the reading hasn't changed. If it has,
1650 a third read will be correct since the count value will definitely have latched by then. */
1651 first_read =
1652 read_register(counter,
1653 NITIO_Gi_SW_Save_Reg(counter->counter_index));
1654 second_read =
1655 read_register(counter,
1656 NITIO_Gi_SW_Save_Reg(counter->counter_index));
1657 if (first_read != second_read)
1658 correct_read =
1659 read_register(counter,
1660 NITIO_Gi_SW_Save_Reg(counter->
1661 counter_index));
1662 else
1663 correct_read = first_read;
1664 data[0] = correct_read;
1665 return 0;
1666 break;
1667 case 1:
1668 data[0] =
1669 counter_dev->
1670 regs[NITIO_Gi_LoadA_Reg(counter->counter_index)];
1671 break;
1672 case 2:
1673 data[0] =
1674 counter_dev->
1675 regs[NITIO_Gi_LoadB_Reg(counter->counter_index)];
1676 break;
1677 };
1678 return 0;
1679 }
1680 EXPORT_SYMBOL_GPL(ni_tio_rinsn);
1681
1682 static unsigned ni_tio_next_load_register(struct ni_gpct *counter)
1683 {
1684 const unsigned bits = read_register(counter,
1685 NITIO_Gxx_Status_Reg(counter->
1686 counter_index));
1687
1688 if (bits & Gi_Next_Load_Source_Bit(counter->counter_index))
1689 return NITIO_Gi_LoadB_Reg(counter->counter_index);
1690 else
1691 return NITIO_Gi_LoadA_Reg(counter->counter_index);
1692 }
1693
1694 int ni_tio_winsn(struct ni_gpct *counter, struct comedi_insn *insn,
1695 unsigned int *data)
1696 {
1697 struct ni_gpct_device *counter_dev = counter->counter_dev;
1698 const unsigned channel = CR_CHAN(insn->chanspec);
1699 unsigned load_reg;
1700
1701 if (insn->n < 1)
1702 return 0;
1703 switch (channel) {
1704 case 0:
1705 /* Unsafe if counter is armed. Should probably check status and return -EBUSY if armed. */
1706 /* Don't disturb load source select, just use whichever load register is already selected. */
1707 load_reg = ni_tio_next_load_register(counter);
1708 write_register(counter, data[0], load_reg);
1709 ni_tio_set_bits_transient(counter,
1710 NITIO_Gi_Command_Reg(counter->
1711 counter_index),
1712 0, 0, Gi_Load_Bit);
1713 /* restore state of load reg to whatever the user set last set it to */
1714 write_register(counter, counter_dev->regs[load_reg], load_reg);
1715 break;
1716 case 1:
1717 counter_dev->regs[NITIO_Gi_LoadA_Reg(counter->counter_index)] =
1718 data[0];
1719 write_register(counter, data[0],
1720 NITIO_Gi_LoadA_Reg(counter->counter_index));
1721 break;
1722 case 2:
1723 counter_dev->regs[NITIO_Gi_LoadB_Reg(counter->counter_index)] =
1724 data[0];
1725 write_register(counter, data[0],
1726 NITIO_Gi_LoadB_Reg(counter->counter_index));
1727 break;
1728 default:
1729 return -EINVAL;
1730 break;
1731 }
1732 return 0;
1733 }
1734 EXPORT_SYMBOL_GPL(ni_tio_winsn);
kernel source for telekom puls (alcatel/mediatek)