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[deliverable/linux.git] / drivers / staging / comedi / drivers / cb_pcidas64.c
1 /*
2 comedi/drivers/cb_pcidas64.c
3 This is a driver for the ComputerBoards/MeasurementComputing PCI-DAS
4 64xx, 60xx, and 4020 cards.
5
6 Author: Frank Mori Hess <fmhess@users.sourceforge.net>
7 Copyright (C) 2001, 2002 Frank Mori Hess
8
9 Thanks also go to the following people:
10
11 Steve Rosenbluth, for providing the source code for
12 his pci-das6402 driver, and source code for working QNX pci-6402
13 drivers by Greg Laird and Mariusz Bogacz. None of the code was
14 used directly here, but it was useful as an additional source of
15 documentation on how to program the boards.
16
17 John Sims, for much testing and feedback on pcidas-4020 support.
18
19 COMEDI - Linux Control and Measurement Device Interface
20 Copyright (C) 1997-8 David A. Schleef <ds@schleef.org>
21
22 This program is free software; you can redistribute it and/or modify
23 it under the terms of the GNU General Public License as published by
24 the Free Software Foundation; either version 2 of the License, or
25 (at your option) any later version.
26
27 This program is distributed in the hope that it will be useful,
28 but WITHOUT ANY WARRANTY; without even the implied warranty of
29 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
30 GNU General Public License for more details.
31
32 You should have received a copy of the GNU General Public License
33 along with this program; if not, write to the Free Software
34 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
35
36 ************************************************************************/
37
38 /*
39
40 Driver: cb_pcidas64
41 Description: MeasurementComputing PCI-DAS64xx, 60XX, and 4020 series with the PLX 9080 PCI controller
42 Author: Frank Mori Hess <fmhess@users.sourceforge.net>
43 Status: works
44 Updated: 2002-10-09
45 Devices: [Measurement Computing] PCI-DAS6402/16 (cb_pcidas64),
46 PCI-DAS6402/12, PCI-DAS64/M1/16, PCI-DAS64/M2/16,
47 PCI-DAS64/M3/16, PCI-DAS6402/16/JR, PCI-DAS64/M1/16/JR,
48 PCI-DAS64/M2/16/JR, PCI-DAS64/M3/16/JR, PCI-DAS64/M1/14,
49 PCI-DAS64/M2/14, PCI-DAS64/M3/14, PCI-DAS6013, PCI-DAS6014,
50 PCI-DAS6023, PCI-DAS6025, PCI-DAS6030,
51 PCI-DAS6031, PCI-DAS6032, PCI-DAS6033, PCI-DAS6034,
52 PCI-DAS6035, PCI-DAS6036, PCI-DAS6040, PCI-DAS6052,
53 PCI-DAS6070, PCI-DAS6071, PCI-DAS4020/12
54
55 Configuration options:
56 [0] - PCI bus of device (optional)
57 [1] - PCI slot of device (optional)
58
59 These boards may be autocalibrated with the comedi_calibrate utility.
60
61 To select the bnc trigger input on the 4020 (instead of the dio input),
62 specify a nonzero channel in the chanspec. If you wish to use an external
63 master clock on the 4020, you may do so by setting the scan_begin_src
64 to TRIG_OTHER, and using an INSN_CONFIG_TIMER_1 configuration insn
65 to configure the divisor to use for the external clock.
66
67 Some devices are not identified because the PCI device IDs are not yet
68 known. If you have such a board, please file a bug report at
69 https://bugs.comedi.org.
70
71 */
72
73 /*
74
75 TODO:
76 make it return error if user attempts an ai command that uses the
77 external queue, and an ao command simultaneously
78 user counter subdevice
79 there are a number of boards this driver will support when they are
80 fully released, but does not yet since the pci device id numbers
81 are not yet available.
82 support prescaled 100khz clock for slow pacing (not available on 6000 series?)
83 make ao fifo size adjustable like ai fifo
84 */
85
86 #include "../comedidev.h"
87 #include <linux/delay.h>
88 #include <linux/interrupt.h>
89
90 #include "8253.h"
91 #include "8255.h"
92 #include "plx9080.h"
93 #include "comedi_fc.h"
94
95 #undef PCIDAS64_DEBUG /* disable debugging code */
96 /* #define PCIDAS64_DEBUG enable debugging code */
97
98 #ifdef PCIDAS64_DEBUG
99 #define DEBUG_PRINT(format, args...) printk(format , ## args)
100 #else
101 #define DEBUG_PRINT(format, args...)
102 #endif
103
104 #define TIMER_BASE 25 /* 40MHz master clock */
105 #define PRESCALED_TIMER_BASE 10000 /* 100kHz 'prescaled' clock for slow acquisition, maybe I'll support this someday */
106 #define DMA_BUFFER_SIZE 0x1000
107
108 #define PCI_VENDOR_ID_COMPUTERBOARDS 0x1307
109
110 /* maximum value that can be loaded into board's 24-bit counters*/
111 static const int max_counter_value = 0xffffff;
112
113 /* PCI-DAS64xxx base addresses */
114
115 /* indices of base address regions */
116 enum base_address_regions {
117 PLX9080_BADDRINDEX = 0,
118 MAIN_BADDRINDEX = 2,
119 DIO_COUNTER_BADDRINDEX = 3,
120 };
121
122 /* devpriv->main_iobase registers */
123 enum write_only_registers {
124 INTR_ENABLE_REG = 0x0, /* interrupt enable register */
125 HW_CONFIG_REG = 0x2, /* hardware config register */
126 DAQ_SYNC_REG = 0xc,
127 DAQ_ATRIG_LOW_4020_REG = 0xc,
128 ADC_CONTROL0_REG = 0x10, /* adc control register 0 */
129 ADC_CONTROL1_REG = 0x12, /* adc control register 1 */
130 CALIBRATION_REG = 0x14,
131 ADC_SAMPLE_INTERVAL_LOWER_REG = 0x16, /* lower 16 bits of adc sample interval counter */
132 ADC_SAMPLE_INTERVAL_UPPER_REG = 0x18, /* upper 8 bits of adc sample interval counter */
133 ADC_DELAY_INTERVAL_LOWER_REG = 0x1a, /* lower 16 bits of delay interval counter */
134 ADC_DELAY_INTERVAL_UPPER_REG = 0x1c, /* upper 8 bits of delay interval counter */
135 ADC_COUNT_LOWER_REG = 0x1e, /* lower 16 bits of hardware conversion/scan counter */
136 ADC_COUNT_UPPER_REG = 0x20, /* upper 8 bits of hardware conversion/scan counter */
137 ADC_START_REG = 0x22, /* software trigger to start acquisition */
138 ADC_CONVERT_REG = 0x24, /* initiates single conversion */
139 ADC_QUEUE_CLEAR_REG = 0x26, /* clears adc queue */
140 ADC_QUEUE_LOAD_REG = 0x28, /* loads adc queue */
141 ADC_BUFFER_CLEAR_REG = 0x2a,
142 ADC_QUEUE_HIGH_REG = 0x2c, /* high channel for internal queue, use adc_chan_bits() inline above */
143 DAC_CONTROL0_REG = 0x50, /* dac control register 0 */
144 DAC_CONTROL1_REG = 0x52, /* dac control register 0 */
145 DAC_SAMPLE_INTERVAL_LOWER_REG = 0x54, /* lower 16 bits of dac sample interval counter */
146 DAC_SAMPLE_INTERVAL_UPPER_REG = 0x56, /* upper 8 bits of dac sample interval counter */
147 DAC_SELECT_REG = 0x60,
148 DAC_START_REG = 0x64,
149 DAC_BUFFER_CLEAR_REG = 0x66, /* clear dac buffer */
150 };
151 static inline unsigned int dac_convert_reg(unsigned int channel)
152 {
153 return 0x70 + (2 * (channel & 0x1));
154 }
155
156 static inline unsigned int dac_lsb_4020_reg(unsigned int channel)
157 {
158 return 0x70 + (4 * (channel & 0x1));
159 }
160
161 static inline unsigned int dac_msb_4020_reg(unsigned int channel)
162 {
163 return 0x72 + (4 * (channel & 0x1));
164 }
165
166 enum read_only_registers {
167 HW_STATUS_REG = 0x0, /* hardware status register, reading this apparently clears pending interrupts as well */
168 PIPE1_READ_REG = 0x4,
169 ADC_READ_PNTR_REG = 0x8,
170 LOWER_XFER_REG = 0x10,
171 ADC_WRITE_PNTR_REG = 0xc,
172 PREPOST_REG = 0x14,
173 };
174
175 enum read_write_registers {
176 I8255_4020_REG = 0x48, /* 8255 offset, for 4020 only */
177 ADC_QUEUE_FIFO_REG = 0x100, /* external channel/gain queue, uses same bits as ADC_QUEUE_LOAD_REG */
178 ADC_FIFO_REG = 0x200, /* adc data fifo */
179 DAC_FIFO_REG = 0x300, /* dac data fifo, has weird interactions with external channel queue */
180 };
181
182 /* devpriv->dio_counter_iobase registers */
183 enum dio_counter_registers {
184 DIO_8255_OFFSET = 0x0,
185 DO_REG = 0x20,
186 DI_REG = 0x28,
187 DIO_DIRECTION_60XX_REG = 0x40,
188 DIO_DATA_60XX_REG = 0x48,
189 };
190
191 /* bit definitions for write-only registers */
192
193 enum intr_enable_contents {
194 ADC_INTR_SRC_MASK = 0x3, /* bits that set adc interrupt source */
195 ADC_INTR_QFULL_BITS = 0x0, /* interrupt fifo quater full */
196 ADC_INTR_EOC_BITS = 0x1, /* interrupt end of conversion */
197 ADC_INTR_EOSCAN_BITS = 0x2, /* interrupt end of scan */
198 ADC_INTR_EOSEQ_BITS = 0x3, /* interrupt end of sequence (probably wont use this it's pretty fancy) */
199 EN_ADC_INTR_SRC_BIT = 0x4, /* enable adc interrupt source */
200 EN_ADC_DONE_INTR_BIT = 0x8, /* enable adc acquisition done interrupt */
201 DAC_INTR_SRC_MASK = 0x30,
202 DAC_INTR_QEMPTY_BITS = 0x0,
203 DAC_INTR_HIGH_CHAN_BITS = 0x10,
204 EN_DAC_INTR_SRC_BIT = 0x40, /* enable dac interrupt source */
205 EN_DAC_DONE_INTR_BIT = 0x80,
206 EN_ADC_ACTIVE_INTR_BIT = 0x200, /* enable adc active interrupt */
207 EN_ADC_STOP_INTR_BIT = 0x400, /* enable adc stop trigger interrupt */
208 EN_DAC_ACTIVE_INTR_BIT = 0x800, /* enable dac active interrupt */
209 EN_DAC_UNDERRUN_BIT = 0x4000, /* enable dac underrun status bit */
210 EN_ADC_OVERRUN_BIT = 0x8000, /* enable adc overrun status bit */
211 };
212
213 enum hw_config_contents {
214 MASTER_CLOCK_4020_MASK = 0x3, /* bits that specify master clock source for 4020 */
215 INTERNAL_CLOCK_4020_BITS = 0x1, /* use 40 MHz internal master clock for 4020 */
216 BNC_CLOCK_4020_BITS = 0x2, /* use BNC input for master clock */
217 EXT_CLOCK_4020_BITS = 0x3, /* use dio input for master clock */
218 EXT_QUEUE_BIT = 0x200, /* use external channel/gain queue (more versatile than internal queue) */
219 SLOW_DAC_BIT = 0x400, /* use 225 nanosec strobe when loading dac instead of 50 nanosec */
220 HW_CONFIG_DUMMY_BITS = 0x2000, /* bit with unknown function yet given as default value in pci-das64 manual */
221 DMA_CH_SELECT_BIT = 0x8000, /* bit selects channels 1/0 for analog input/output, otherwise 0/1 */
222 FIFO_SIZE_REG = 0x4, /* allows adjustment of fifo sizes */
223 DAC_FIFO_SIZE_MASK = 0xff00, /* bits that set dac fifo size */
224 DAC_FIFO_BITS = 0xf800, /* 8k sample ao fifo */
225 };
226 #define DAC_FIFO_SIZE 0x2000
227
228 enum daq_atrig_low_4020_contents {
229 EXT_AGATE_BNC_BIT = 0x8000, /* use trig/ext clk bnc input for analog gate signal */
230 EXT_STOP_TRIG_BNC_BIT = 0x4000, /* use trig/ext clk bnc input for external stop trigger signal */
231 EXT_START_TRIG_BNC_BIT = 0x2000, /* use trig/ext clk bnc input for external start trigger signal */
232 };
233 static inline uint16_t analog_trig_low_threshold_bits(uint16_t threshold)
234 {
235 return threshold & 0xfff;
236 }
237
238 enum adc_control0_contents {
239 ADC_GATE_SRC_MASK = 0x3, /* bits that select gate */
240 ADC_SOFT_GATE_BITS = 0x1, /* software gate */
241 ADC_EXT_GATE_BITS = 0x2, /* external digital gate */
242 ADC_ANALOG_GATE_BITS = 0x3, /* analog level gate */
243 ADC_GATE_LEVEL_BIT = 0x4, /* level-sensitive gate (for digital) */
244 ADC_GATE_POLARITY_BIT = 0x8, /* gate active low */
245 ADC_START_TRIG_SOFT_BITS = 0x10,
246 ADC_START_TRIG_EXT_BITS = 0x20,
247 ADC_START_TRIG_ANALOG_BITS = 0x30,
248 ADC_START_TRIG_MASK = 0x30,
249 ADC_START_TRIG_FALLING_BIT = 0x40, /* trig 1 uses falling edge */
250 ADC_EXT_CONV_FALLING_BIT = 0x800, /* external pacing uses falling edge */
251 ADC_SAMPLE_COUNTER_EN_BIT = 0x1000, /* enable hardware scan counter */
252 ADC_DMA_DISABLE_BIT = 0x4000, /* disables dma */
253 ADC_ENABLE_BIT = 0x8000, /* master adc enable */
254 };
255
256 enum adc_control1_contents {
257 ADC_QUEUE_CONFIG_BIT = 0x1, /* should be set for boards with > 16 channels */
258 CONVERT_POLARITY_BIT = 0x10,
259 EOC_POLARITY_BIT = 0x20,
260 ADC_SW_GATE_BIT = 0x40, /* software gate of adc */
261 ADC_DITHER_BIT = 0x200, /* turn on extra noise for dithering */
262 RETRIGGER_BIT = 0x800,
263 ADC_LO_CHANNEL_4020_MASK = 0x300,
264 ADC_HI_CHANNEL_4020_MASK = 0xc00,
265 TWO_CHANNEL_4020_BITS = 0x1000, /* two channel mode for 4020 */
266 FOUR_CHANNEL_4020_BITS = 0x2000, /* four channel mode for 4020 */
267 CHANNEL_MODE_4020_MASK = 0x3000,
268 ADC_MODE_MASK = 0xf000,
269 };
270 static inline uint16_t adc_lo_chan_4020_bits(unsigned int channel)
271 {
272 return (channel & 0x3) << 8;
273 };
274
275 static inline uint16_t adc_hi_chan_4020_bits(unsigned int channel)
276 {
277 return (channel & 0x3) << 10;
278 };
279
280 static inline uint16_t adc_mode_bits(unsigned int mode)
281 {
282 return (mode & 0xf) << 12;
283 };
284
285 enum calibration_contents {
286 SELECT_8800_BIT = 0x1,
287 SELECT_8402_64XX_BIT = 0x2,
288 SELECT_1590_60XX_BIT = 0x2,
289 CAL_EN_64XX_BIT = 0x40, /* calibration enable for 64xx series */
290 SERIAL_DATA_IN_BIT = 0x80,
291 SERIAL_CLOCK_BIT = 0x100,
292 CAL_EN_60XX_BIT = 0x200, /* calibration enable for 60xx series */
293 CAL_GAIN_BIT = 0x800,
294 };
295 /* calibration sources for 6025 are:
296 * 0 : ground
297 * 1 : 10V
298 * 2 : 5V
299 * 3 : 0.5V
300 * 4 : 0.05V
301 * 5 : ground
302 * 6 : dac channel 0
303 * 7 : dac channel 1
304 */
305 static inline uint16_t adc_src_bits(unsigned int source)
306 {
307 return (source & 0xf) << 3;
308 };
309
310 static inline uint16_t adc_convert_chan_4020_bits(unsigned int channel)
311 {
312 return (channel & 0x3) << 8;
313 };
314
315 enum adc_queue_load_contents {
316 UNIP_BIT = 0x800, /* unipolar/bipolar bit */
317 ADC_SE_DIFF_BIT = 0x1000, /* single-ended/ differential bit */
318 ADC_COMMON_BIT = 0x2000, /* non-referenced single-ended (common-mode input) */
319 QUEUE_EOSEQ_BIT = 0x4000, /* queue end of sequence */
320 QUEUE_EOSCAN_BIT = 0x8000, /* queue end of scan */
321 };
322 static inline uint16_t adc_chan_bits(unsigned int channel)
323 {
324 return channel & 0x3f;
325 };
326
327 enum dac_control0_contents {
328 DAC_ENABLE_BIT = 0x8000, /* dac controller enable bit */
329 DAC_CYCLIC_STOP_BIT = 0x4000,
330 DAC_WAVEFORM_MODE_BIT = 0x100,
331 DAC_EXT_UPDATE_FALLING_BIT = 0x80,
332 DAC_EXT_UPDATE_ENABLE_BIT = 0x40,
333 WAVEFORM_TRIG_MASK = 0x30,
334 WAVEFORM_TRIG_DISABLED_BITS = 0x0,
335 WAVEFORM_TRIG_SOFT_BITS = 0x10,
336 WAVEFORM_TRIG_EXT_BITS = 0x20,
337 WAVEFORM_TRIG_ADC1_BITS = 0x30,
338 WAVEFORM_TRIG_FALLING_BIT = 0x8,
339 WAVEFORM_GATE_LEVEL_BIT = 0x4,
340 WAVEFORM_GATE_ENABLE_BIT = 0x2,
341 WAVEFORM_GATE_SELECT_BIT = 0x1,
342 };
343
344 enum dac_control1_contents {
345 DAC_WRITE_POLARITY_BIT = 0x800, /* board-dependent setting */
346 DAC1_EXT_REF_BIT = 0x200,
347 DAC0_EXT_REF_BIT = 0x100,
348 DAC_OUTPUT_ENABLE_BIT = 0x80, /* dac output enable bit */
349 DAC_UPDATE_POLARITY_BIT = 0x40, /* board-dependent setting */
350 DAC_SW_GATE_BIT = 0x20,
351 DAC1_UNIPOLAR_BIT = 0x8,
352 DAC0_UNIPOLAR_BIT = 0x2,
353 };
354
355 /* bit definitions for read-only registers */
356 enum hw_status_contents {
357 DAC_UNDERRUN_BIT = 0x1,
358 ADC_OVERRUN_BIT = 0x2,
359 DAC_ACTIVE_BIT = 0x4,
360 ADC_ACTIVE_BIT = 0x8,
361 DAC_INTR_PENDING_BIT = 0x10,
362 ADC_INTR_PENDING_BIT = 0x20,
363 DAC_DONE_BIT = 0x40,
364 ADC_DONE_BIT = 0x80,
365 EXT_INTR_PENDING_BIT = 0x100,
366 ADC_STOP_BIT = 0x200,
367 };
368 static inline uint16_t pipe_full_bits(uint16_t hw_status_bits)
369 {
370 return (hw_status_bits >> 10) & 0x3;
371 };
372
373 static inline unsigned int dma_chain_flag_bits(uint16_t prepost_bits)
374 {
375 return (prepost_bits >> 6) & 0x3;
376 }
377
378 static inline unsigned int adc_upper_read_ptr_code(uint16_t prepost_bits)
379 {
380 return (prepost_bits >> 12) & 0x3;
381 }
382
383 static inline unsigned int adc_upper_write_ptr_code(uint16_t prepost_bits)
384 {
385 return (prepost_bits >> 14) & 0x3;
386 }
387
388 /* I2C addresses for 4020 */
389 enum i2c_addresses {
390 RANGE_CAL_I2C_ADDR = 0x20,
391 CALDAC0_I2C_ADDR = 0xc,
392 CALDAC1_I2C_ADDR = 0xd,
393 };
394
395 enum range_cal_i2c_contents {
396 ADC_SRC_4020_MASK = 0x70, /* bits that set what source the adc converter measures */
397 BNC_TRIG_THRESHOLD_0V_BIT = 0x80, /* make bnc trig/ext clock threshold 0V instead of 2.5V */
398 };
399 static inline uint8_t adc_src_4020_bits(unsigned int source)
400 {
401 return (source << 4) & ADC_SRC_4020_MASK;
402 };
403
404 static inline uint8_t attenuate_bit(unsigned int channel)
405 {
406 /* attenuate channel (+-5V input range) */
407 return 1 << (channel & 0x3);
408 };
409
410 /* analog input ranges for 64xx boards */
411 static const struct comedi_lrange ai_ranges_64xx = {
412 8,
413 {
414 BIP_RANGE(10),
415 BIP_RANGE(5),
416 BIP_RANGE(2.5),
417 BIP_RANGE(1.25),
418 UNI_RANGE(10),
419 UNI_RANGE(5),
420 UNI_RANGE(2.5),
421 UNI_RANGE(1.25)
422 }
423 };
424
425 /* analog input ranges for 60xx boards */
426 static const struct comedi_lrange ai_ranges_60xx = {
427 4,
428 {
429 BIP_RANGE(10),
430 BIP_RANGE(5),
431 BIP_RANGE(0.5),
432 BIP_RANGE(0.05),
433 }
434 };
435
436 /* analog input ranges for 6030, etc boards */
437 static const struct comedi_lrange ai_ranges_6030 = {
438 14,
439 {
440 BIP_RANGE(10),
441 BIP_RANGE(5),
442 BIP_RANGE(2),
443 BIP_RANGE(1),
444 BIP_RANGE(0.5),
445 BIP_RANGE(0.2),
446 BIP_RANGE(0.1),
447 UNI_RANGE(10),
448 UNI_RANGE(5),
449 UNI_RANGE(2),
450 UNI_RANGE(1),
451 UNI_RANGE(0.5),
452 UNI_RANGE(0.2),
453 UNI_RANGE(0.1),
454 }
455 };
456
457 /* analog input ranges for 6052, etc boards */
458 static const struct comedi_lrange ai_ranges_6052 = {
459 15,
460 {
461 BIP_RANGE(10),
462 BIP_RANGE(5),
463 BIP_RANGE(2.5),
464 BIP_RANGE(1),
465 BIP_RANGE(0.5),
466 BIP_RANGE(0.25),
467 BIP_RANGE(0.1),
468 BIP_RANGE(0.05),
469 UNI_RANGE(10),
470 UNI_RANGE(5),
471 UNI_RANGE(2),
472 UNI_RANGE(1),
473 UNI_RANGE(0.5),
474 UNI_RANGE(0.2),
475 UNI_RANGE(0.1),
476 }
477 };
478
479 /* analog input ranges for 4020 board */
480 static const struct comedi_lrange ai_ranges_4020 = {
481 2,
482 {
483 BIP_RANGE(5),
484 BIP_RANGE(1),
485 }
486 };
487
488 /* analog output ranges */
489 static const struct comedi_lrange ao_ranges_64xx = {
490 4,
491 {
492 BIP_RANGE(5),
493 BIP_RANGE(10),
494 UNI_RANGE(5),
495 UNI_RANGE(10),
496 }
497 };
498
499 static const int ao_range_code_64xx[] = {
500 0x0,
501 0x1,
502 0x2,
503 0x3,
504 };
505
506 static const struct comedi_lrange ao_ranges_60xx = {
507 1,
508 {
509 BIP_RANGE(10),
510 }
511 };
512
513 static const int ao_range_code_60xx[] = {
514 0x0,
515 };
516
517 static const struct comedi_lrange ao_ranges_6030 = {
518 2,
519 {
520 BIP_RANGE(10),
521 UNI_RANGE(10),
522 }
523 };
524
525 static const int ao_range_code_6030[] = {
526 0x0,
527 0x2,
528 };
529
530 static const struct comedi_lrange ao_ranges_4020 = {
531 2,
532 {
533 BIP_RANGE(5),
534 BIP_RANGE(10),
535 }
536 };
537
538 static const int ao_range_code_4020[] = {
539 0x1,
540 0x0,
541 };
542
543 enum register_layout {
544 LAYOUT_60XX,
545 LAYOUT_64XX,
546 LAYOUT_4020,
547 };
548
549 struct hw_fifo_info {
550 unsigned int num_segments;
551 unsigned int max_segment_length;
552 unsigned int sample_packing_ratio;
553 uint16_t fifo_size_reg_mask;
554 };
555
556 struct pcidas64_board {
557 const char *name;
558 int device_id; /* pci device id */
559 int ai_se_chans; /* number of ai inputs in single-ended mode */
560 int ai_bits; /* analog input resolution */
561 int ai_speed; /* fastest conversion period in ns */
562 const struct comedi_lrange *ai_range_table;
563 int ao_nchan; /* number of analog out channels */
564 int ao_bits; /* analog output resolution */
565 int ao_scan_speed; /* analog output speed (for a scan, not conversion) */
566 const struct comedi_lrange *ao_range_table;
567 const int *ao_range_code;
568 const struct hw_fifo_info *const ai_fifo;
569 enum register_layout layout; /* different board families have slightly different registers */
570 unsigned has_8255:1;
571 };
572
573 static const struct hw_fifo_info ai_fifo_4020 = {
574 .num_segments = 2,
575 .max_segment_length = 0x8000,
576 .sample_packing_ratio = 2,
577 .fifo_size_reg_mask = 0x7f,
578 };
579
580 static const struct hw_fifo_info ai_fifo_64xx = {
581 .num_segments = 4,
582 .max_segment_length = 0x800,
583 .sample_packing_ratio = 1,
584 .fifo_size_reg_mask = 0x3f,
585 };
586
587 static const struct hw_fifo_info ai_fifo_60xx = {
588 .num_segments = 4,
589 .max_segment_length = 0x800,
590 .sample_packing_ratio = 1,
591 .fifo_size_reg_mask = 0x7f,
592 };
593
594 /* maximum number of dma transfers we will chain together into a ring
595 * (and the maximum number of dma buffers we maintain) */
596 #define MAX_AI_DMA_RING_COUNT (0x80000 / DMA_BUFFER_SIZE)
597 #define MIN_AI_DMA_RING_COUNT (0x10000 / DMA_BUFFER_SIZE)
598 #define AO_DMA_RING_COUNT (0x10000 / DMA_BUFFER_SIZE)
599 static inline unsigned int ai_dma_ring_count(struct pcidas64_board *board)
600 {
601 if (board->layout == LAYOUT_4020)
602 return MAX_AI_DMA_RING_COUNT;
603 else
604 return MIN_AI_DMA_RING_COUNT;
605 }
606
607 static const int bytes_in_sample = 2;
608
609 static const struct pcidas64_board pcidas64_boards[] = {
610 {
611 .name = "pci-das6402/16",
612 .device_id = 0x1d,
613 .ai_se_chans = 64,
614 .ai_bits = 16,
615 .ai_speed = 5000,
616 .ao_nchan = 2,
617 .ao_bits = 16,
618 .ao_scan_speed = 10000,
619 .layout = LAYOUT_64XX,
620 .ai_range_table = &ai_ranges_64xx,
621 .ao_range_table = &ao_ranges_64xx,
622 .ao_range_code = ao_range_code_64xx,
623 .ai_fifo = &ai_fifo_64xx,
624 .has_8255 = 1,
625 },
626 {
627 .name = "pci-das6402/12", /* XXX check */
628 .device_id = 0x1e,
629 .ai_se_chans = 64,
630 .ai_bits = 12,
631 .ai_speed = 5000,
632 .ao_nchan = 2,
633 .ao_bits = 12,
634 .ao_scan_speed = 10000,
635 .layout = LAYOUT_64XX,
636 .ai_range_table = &ai_ranges_64xx,
637 .ao_range_table = &ao_ranges_64xx,
638 .ao_range_code = ao_range_code_64xx,
639 .ai_fifo = &ai_fifo_64xx,
640 .has_8255 = 1,
641 },
642 {
643 .name = "pci-das64/m1/16",
644 .device_id = 0x35,
645 .ai_se_chans = 64,
646 .ai_bits = 16,
647 .ai_speed = 1000,
648 .ao_nchan = 2,
649 .ao_bits = 16,
650 .ao_scan_speed = 10000,
651 .layout = LAYOUT_64XX,
652 .ai_range_table = &ai_ranges_64xx,
653 .ao_range_table = &ao_ranges_64xx,
654 .ao_range_code = ao_range_code_64xx,
655 .ai_fifo = &ai_fifo_64xx,
656 .has_8255 = 1,
657 },
658 {
659 .name = "pci-das64/m2/16",
660 .device_id = 0x36,
661 .ai_se_chans = 64,
662 .ai_bits = 16,
663 .ai_speed = 500,
664 .ao_nchan = 2,
665 .ao_bits = 16,
666 .ao_scan_speed = 10000,
667 .layout = LAYOUT_64XX,
668 .ai_range_table = &ai_ranges_64xx,
669 .ao_range_table = &ao_ranges_64xx,
670 .ao_range_code = ao_range_code_64xx,
671 .ai_fifo = &ai_fifo_64xx,
672 .has_8255 = 1,
673 },
674 {
675 .name = "pci-das64/m3/16",
676 .device_id = 0x37,
677 .ai_se_chans = 64,
678 .ai_bits = 16,
679 .ai_speed = 333,
680 .ao_nchan = 2,
681 .ao_bits = 16,
682 .ao_scan_speed = 10000,
683 .layout = LAYOUT_64XX,
684 .ai_range_table = &ai_ranges_64xx,
685 .ao_range_table = &ao_ranges_64xx,
686 .ao_range_code = ao_range_code_64xx,
687 .ai_fifo = &ai_fifo_64xx,
688 .has_8255 = 1,
689 },
690 {
691 .name = "pci-das6013",
692 .device_id = 0x78,
693 .ai_se_chans = 16,
694 .ai_bits = 16,
695 .ai_speed = 5000,
696 .ao_nchan = 0,
697 .ao_bits = 16,
698 .layout = LAYOUT_60XX,
699 .ai_range_table = &ai_ranges_60xx,
700 .ao_range_table = &ao_ranges_60xx,
701 .ao_range_code = ao_range_code_60xx,
702 .ai_fifo = &ai_fifo_60xx,
703 .has_8255 = 0,
704 },
705 {
706 .name = "pci-das6014",
707 .device_id = 0x79,
708 .ai_se_chans = 16,
709 .ai_bits = 16,
710 .ai_speed = 5000,
711 .ao_nchan = 2,
712 .ao_bits = 16,
713 .ao_scan_speed = 100000,
714 .layout = LAYOUT_60XX,
715 .ai_range_table = &ai_ranges_60xx,
716 .ao_range_table = &ao_ranges_60xx,
717 .ao_range_code = ao_range_code_60xx,
718 .ai_fifo = &ai_fifo_60xx,
719 .has_8255 = 0,
720 },
721 {
722 .name = "pci-das6023",
723 .device_id = 0x5d,
724 .ai_se_chans = 16,
725 .ai_bits = 12,
726 .ai_speed = 5000,
727 .ao_nchan = 0,
728 .ao_scan_speed = 100000,
729 .layout = LAYOUT_60XX,
730 .ai_range_table = &ai_ranges_60xx,
731 .ao_range_table = &ao_ranges_60xx,
732 .ao_range_code = ao_range_code_60xx,
733 .ai_fifo = &ai_fifo_60xx,
734 .has_8255 = 1,
735 },
736 {
737 .name = "pci-das6025",
738 .device_id = 0x5e,
739 .ai_se_chans = 16,
740 .ai_bits = 12,
741 .ai_speed = 5000,
742 .ao_nchan = 2,
743 .ao_bits = 12,
744 .ao_scan_speed = 100000,
745 .layout = LAYOUT_60XX,
746 .ai_range_table = &ai_ranges_60xx,
747 .ao_range_table = &ao_ranges_60xx,
748 .ao_range_code = ao_range_code_60xx,
749 .ai_fifo = &ai_fifo_60xx,
750 .has_8255 = 1,
751 },
752 {
753 .name = "pci-das6030",
754 .device_id = 0x5f,
755 .ai_se_chans = 16,
756 .ai_bits = 16,
757 .ai_speed = 10000,
758 .ao_nchan = 2,
759 .ao_bits = 16,
760 .ao_scan_speed = 10000,
761 .layout = LAYOUT_60XX,
762 .ai_range_table = &ai_ranges_6030,
763 .ao_range_table = &ao_ranges_6030,
764 .ao_range_code = ao_range_code_6030,
765 .ai_fifo = &ai_fifo_60xx,
766 .has_8255 = 0,
767 },
768 {
769 .name = "pci-das6031",
770 .device_id = 0x60,
771 .ai_se_chans = 64,
772 .ai_bits = 16,
773 .ai_speed = 10000,
774 .ao_nchan = 2,
775 .ao_bits = 16,
776 .ao_scan_speed = 10000,
777 .layout = LAYOUT_60XX,
778 .ai_range_table = &ai_ranges_6030,
779 .ao_range_table = &ao_ranges_6030,
780 .ao_range_code = ao_range_code_6030,
781 .ai_fifo = &ai_fifo_60xx,
782 .has_8255 = 0,
783 },
784 {
785 .name = "pci-das6032",
786 .device_id = 0x61,
787 .ai_se_chans = 16,
788 .ai_bits = 16,
789 .ai_speed = 10000,
790 .ao_nchan = 0,
791 .layout = LAYOUT_60XX,
792 .ai_range_table = &ai_ranges_6030,
793 .ai_fifo = &ai_fifo_60xx,
794 .has_8255 = 0,
795 },
796 {
797 .name = "pci-das6033",
798 .device_id = 0x62,
799 .ai_se_chans = 64,
800 .ai_bits = 16,
801 .ai_speed = 10000,
802 .ao_nchan = 0,
803 .layout = LAYOUT_60XX,
804 .ai_range_table = &ai_ranges_6030,
805 .ai_fifo = &ai_fifo_60xx,
806 .has_8255 = 0,
807 },
808 {
809 .name = "pci-das6034",
810 .device_id = 0x63,
811 .ai_se_chans = 16,
812 .ai_bits = 16,
813 .ai_speed = 5000,
814 .ao_nchan = 0,
815 .ao_scan_speed = 0,
816 .layout = LAYOUT_60XX,
817 .ai_range_table = &ai_ranges_60xx,
818 .ai_fifo = &ai_fifo_60xx,
819 .has_8255 = 0,
820 },
821 {
822 .name = "pci-das6035",
823 .device_id = 0x64,
824 .ai_se_chans = 16,
825 .ai_bits = 16,
826 .ai_speed = 5000,
827 .ao_nchan = 2,
828 .ao_bits = 12,
829 .ao_scan_speed = 100000,
830 .layout = LAYOUT_60XX,
831 .ai_range_table = &ai_ranges_60xx,
832 .ao_range_table = &ao_ranges_60xx,
833 .ao_range_code = ao_range_code_60xx,
834 .ai_fifo = &ai_fifo_60xx,
835 .has_8255 = 0,
836 },
837 {
838 .name = "pci-das6036",
839 .device_id = 0x6f,
840 .ai_se_chans = 16,
841 .ai_bits = 16,
842 .ai_speed = 5000,
843 .ao_nchan = 2,
844 .ao_bits = 16,
845 .ao_scan_speed = 100000,
846 .layout = LAYOUT_60XX,
847 .ai_range_table = &ai_ranges_60xx,
848 .ao_range_table = &ao_ranges_60xx,
849 .ao_range_code = ao_range_code_60xx,
850 .ai_fifo = &ai_fifo_60xx,
851 .has_8255 = 0,
852 },
853 {
854 .name = "pci-das6040",
855 .device_id = 0x65,
856 .ai_se_chans = 16,
857 .ai_bits = 12,
858 .ai_speed = 2000,
859 .ao_nchan = 2,
860 .ao_bits = 12,
861 .ao_scan_speed = 1000,
862 .layout = LAYOUT_60XX,
863 .ai_range_table = &ai_ranges_6052,
864 .ao_range_table = &ao_ranges_6030,
865 .ao_range_code = ao_range_code_6030,
866 .ai_fifo = &ai_fifo_60xx,
867 .has_8255 = 0,
868 },
869 {
870 .name = "pci-das6052",
871 .device_id = 0x66,
872 .ai_se_chans = 16,
873 .ai_bits = 16,
874 .ai_speed = 3333,
875 .ao_nchan = 2,
876 .ao_bits = 16,
877 .ao_scan_speed = 3333,
878 .layout = LAYOUT_60XX,
879 .ai_range_table = &ai_ranges_6052,
880 .ao_range_table = &ao_ranges_6030,
881 .ao_range_code = ao_range_code_6030,
882 .ai_fifo = &ai_fifo_60xx,
883 .has_8255 = 0,
884 },
885 {
886 .name = "pci-das6070",
887 .device_id = 0x67,
888 .ai_se_chans = 16,
889 .ai_bits = 12,
890 .ai_speed = 800,
891 .ao_nchan = 2,
892 .ao_bits = 12,
893 .ao_scan_speed = 1000,
894 .layout = LAYOUT_60XX,
895 .ai_range_table = &ai_ranges_6052,
896 .ao_range_table = &ao_ranges_6030,
897 .ao_range_code = ao_range_code_6030,
898 .ai_fifo = &ai_fifo_60xx,
899 .has_8255 = 0,
900 },
901 {
902 .name = "pci-das6071",
903 .device_id = 0x68,
904 .ai_se_chans = 64,
905 .ai_bits = 12,
906 .ai_speed = 800,
907 .ao_nchan = 2,
908 .ao_bits = 12,
909 .ao_scan_speed = 1000,
910 .layout = LAYOUT_60XX,
911 .ai_range_table = &ai_ranges_6052,
912 .ao_range_table = &ao_ranges_6030,
913 .ao_range_code = ao_range_code_6030,
914 .ai_fifo = &ai_fifo_60xx,
915 .has_8255 = 0,
916 },
917 {
918 .name = "pci-das4020/12",
919 .device_id = 0x52,
920 .ai_se_chans = 4,
921 .ai_bits = 12,
922 .ai_speed = 50,
923 .ao_bits = 12,
924 .ao_nchan = 2,
925 .ao_scan_speed = 0, /* no hardware pacing on ao */
926 .layout = LAYOUT_4020,
927 .ai_range_table = &ai_ranges_4020,
928 .ao_range_table = &ao_ranges_4020,
929 .ao_range_code = ao_range_code_4020,
930 .ai_fifo = &ai_fifo_4020,
931 .has_8255 = 1,
932 },
933 #if 0
934 {
935 .name = "pci-das6402/16/jr",
936 .device_id = 0 /* XXX, */
937 .ai_se_chans = 64,
938 .ai_bits = 16,
939 .ai_speed = 5000,
940 .ao_nchan = 0,
941 .ao_scan_speed = 10000,
942 .layout = LAYOUT_64XX,
943 .ai_range_table = &ai_ranges_64xx,
944 .ai_fifo = ai_fifo_64xx,
945 .has_8255 = 1,
946 },
947 {
948 .name = "pci-das64/m1/16/jr",
949 .device_id = 0 /* XXX, */
950 .ai_se_chans = 64,
951 .ai_bits = 16,
952 .ai_speed = 1000,
953 .ao_nchan = 0,
954 .ao_scan_speed = 10000,
955 .layout = LAYOUT_64XX,
956 .ai_range_table = &ai_ranges_64xx,
957 .ai_fifo = ai_fifo_64xx,
958 .has_8255 = 1,
959 },
960 {
961 .name = "pci-das64/m2/16/jr",
962 .device_id = 0 /* XXX, */
963 .ai_se_chans = 64,
964 .ai_bits = 16,
965 .ai_speed = 500,
966 .ao_nchan = 0,
967 .ao_scan_speed = 10000,
968 .layout = LAYOUT_64XX,
969 .ai_range_table = &ai_ranges_64xx,
970 .ai_fifo = ai_fifo_64xx,
971 .has_8255 = 1,
972 },
973 {
974 .name = "pci-das64/m3/16/jr",
975 .device_id = 0 /* XXX, */
976 .ai_se_chans = 64,
977 .ai_bits = 16,
978 .ai_speed = 333,
979 .ao_nchan = 0,
980 .ao_scan_speed = 10000,
981 .layout = LAYOUT_64XX,
982 .ai_range_table = &ai_ranges_64xx,
983 .ai_fifo = ai_fifo_64xx,
984 .has_8255 = 1,
985 },
986 {
987 .name = "pci-das64/m1/14",
988 .device_id = 0, /* XXX */
989 .ai_se_chans = 64,
990 .ai_bits = 14,
991 .ai_speed = 1000,
992 .ao_nchan = 2,
993 .ao_scan_speed = 10000,
994 .layout = LAYOUT_64XX,
995 .ai_range_table = &ai_ranges_64xx,
996 .ai_fifo = ai_fifo_64xx,
997 .has_8255 = 1,
998 },
999 {
1000 .name = "pci-das64/m2/14",
1001 .device_id = 0, /* XXX */
1002 .ai_se_chans = 64,
1003 .ai_bits = 14,
1004 .ai_speed = 500,
1005 .ao_nchan = 2,
1006 .ao_scan_speed = 10000,
1007 .layout = LAYOUT_64XX,
1008 .ai_range_table = &ai_ranges_64xx,
1009 .ai_fifo = ai_fifo_64xx,
1010 .has_8255 = 1,
1011 },
1012 {
1013 .name = "pci-das64/m3/14",
1014 .device_id = 0, /* XXX */
1015 .ai_se_chans = 64,
1016 .ai_bits = 14,
1017 .ai_speed = 333,
1018 .ao_nchan = 2,
1019 .ao_scan_speed = 10000,
1020 .layout = LAYOUT_64XX,
1021 .ai_range_table = &ai_ranges_64xx,
1022 .ai_fifo = ai_fifo_64xx,
1023 .has_8255 = 1,
1024 },
1025 #endif
1026 };
1027
1028 static inline struct pcidas64_board *board(const struct comedi_device *dev)
1029 {
1030 return (struct pcidas64_board *)dev->board_ptr;
1031 }
1032
1033 static inline unsigned short se_diff_bit_6xxx(struct comedi_device *dev,
1034 int use_differential)
1035 {
1036 if ((board(dev)->layout == LAYOUT_64XX && !use_differential) ||
1037 (board(dev)->layout == LAYOUT_60XX && use_differential))
1038 return ADC_SE_DIFF_BIT;
1039 else
1040 return 0;
1041 };
1042
1043 struct ext_clock_info {
1044 unsigned int divisor; /* master clock divisor to use for scans with external master clock */
1045 unsigned int chanspec; /* chanspec for master clock input when used as scan begin src */
1046 };
1047
1048 /* this structure is for data unique to this hardware driver. */
1049 struct pcidas64_private {
1050 /* base addresses (physical) */
1051 resource_size_t plx9080_phys_iobase;
1052 resource_size_t main_phys_iobase;
1053 resource_size_t dio_counter_phys_iobase;
1054 /* base addresses (ioremapped) */
1055 void __iomem *plx9080_iobase;
1056 void __iomem *main_iobase;
1057 void __iomem *dio_counter_iobase;
1058 /* local address (used by dma controller) */
1059 uint32_t local0_iobase;
1060 uint32_t local1_iobase;
1061 volatile unsigned int ai_count; /* number of analog input samples remaining */
1062 uint16_t *ai_buffer[MAX_AI_DMA_RING_COUNT]; /* dma buffers for analog input */
1063 dma_addr_t ai_buffer_bus_addr[MAX_AI_DMA_RING_COUNT]; /* physical addresses of ai dma buffers */
1064 struct plx_dma_desc *ai_dma_desc; /* array of ai dma descriptors read by plx9080, allocated to get proper alignment */
1065 dma_addr_t ai_dma_desc_bus_addr; /* physical address of ai dma descriptor array */
1066 volatile unsigned int ai_dma_index; /* index of the ai dma descriptor/buffer that is currently being used */
1067 uint16_t *ao_buffer[AO_DMA_RING_COUNT]; /* dma buffers for analog output */
1068 dma_addr_t ao_buffer_bus_addr[AO_DMA_RING_COUNT]; /* physical addresses of ao dma buffers */
1069 struct plx_dma_desc *ao_dma_desc;
1070 dma_addr_t ao_dma_desc_bus_addr;
1071 volatile unsigned int ao_dma_index; /* keeps track of buffer where the next ao sample should go */
1072 volatile unsigned long ao_count; /* number of analog output samples remaining */
1073 volatile unsigned int ao_value[2]; /* remember what the analog outputs are set to, to allow readback */
1074 unsigned int hw_revision; /* stc chip hardware revision number */
1075 volatile unsigned int intr_enable_bits; /* last bits sent to INTR_ENABLE_REG register */
1076 volatile uint16_t adc_control1_bits; /* last bits sent to ADC_CONTROL1_REG register */
1077 volatile uint16_t fifo_size_bits; /* last bits sent to FIFO_SIZE_REG register */
1078 volatile uint16_t hw_config_bits; /* last bits sent to HW_CONFIG_REG register */
1079 volatile uint16_t dac_control1_bits;
1080 volatile uint32_t plx_control_bits; /* last bits written to plx9080 control register */
1081 volatile uint32_t plx_intcsr_bits; /* last bits written to plx interrupt control and status register */
1082 volatile int calibration_source; /* index of calibration source readable through ai ch0 */
1083 volatile uint8_t i2c_cal_range_bits; /* bits written to i2c calibration/range register */
1084 volatile unsigned int ext_trig_falling; /* configure digital triggers to trigger on falling edge */
1085 /* states of various devices stored to enable read-back */
1086 unsigned int ad8402_state[2];
1087 unsigned int caldac_state[8];
1088 volatile short ai_cmd_running;
1089 unsigned int ai_fifo_segment_length;
1090 struct ext_clock_info ext_clock;
1091 short ao_bounce_buffer[DAC_FIFO_SIZE];
1092 };
1093
1094 static int ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
1095 struct comedi_insn *insn, unsigned int *data);
1096 static int ai_config_insn(struct comedi_device *dev, struct comedi_subdevice *s,
1097 struct comedi_insn *insn, unsigned int *data);
1098 static int ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
1099 struct comedi_insn *insn, unsigned int *data);
1100 static int ao_readback_insn(struct comedi_device *dev,
1101 struct comedi_subdevice *s,
1102 struct comedi_insn *insn, unsigned int *data);
1103 static int ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s);
1104 static int ai_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s,
1105 struct comedi_cmd *cmd);
1106 static int ao_cmd(struct comedi_device *dev, struct comedi_subdevice *s);
1107 static int ao_inttrig(struct comedi_device *dev,
1108 struct comedi_subdevice *subdev, unsigned int trig_num);
1109 static int ao_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s,
1110 struct comedi_cmd *cmd);
1111 static irqreturn_t handle_interrupt(int irq, void *d);
1112 static int ai_cancel(struct comedi_device *dev, struct comedi_subdevice *s);
1113 static int ao_cancel(struct comedi_device *dev, struct comedi_subdevice *s);
1114 static int dio_callback(int dir, int port, int data, unsigned long arg);
1115 static int dio_callback_4020(int dir, int port, int data, unsigned long arg);
1116 static int di_rbits(struct comedi_device *dev, struct comedi_subdevice *s,
1117 struct comedi_insn *insn, unsigned int *data);
1118 static int do_wbits(struct comedi_device *dev, struct comedi_subdevice *s,
1119 struct comedi_insn *insn, unsigned int *data);
1120 static int dio_60xx_config_insn(struct comedi_device *dev,
1121 struct comedi_subdevice *s,
1122 struct comedi_insn *insn, unsigned int *data);
1123 static int dio_60xx_wbits(struct comedi_device *dev, struct comedi_subdevice *s,
1124 struct comedi_insn *insn, unsigned int *data);
1125 static int calib_read_insn(struct comedi_device *dev,
1126 struct comedi_subdevice *s, struct comedi_insn *insn,
1127 unsigned int *data);
1128 static int calib_write_insn(struct comedi_device *dev,
1129 struct comedi_subdevice *s,
1130 struct comedi_insn *insn, unsigned int *data);
1131 static int ad8402_read_insn(struct comedi_device *dev,
1132 struct comedi_subdevice *s,
1133 struct comedi_insn *insn, unsigned int *data);
1134 static void ad8402_write(struct comedi_device *dev, unsigned int channel,
1135 unsigned int value);
1136 static int ad8402_write_insn(struct comedi_device *dev,
1137 struct comedi_subdevice *s,
1138 struct comedi_insn *insn, unsigned int *data);
1139 static int eeprom_read_insn(struct comedi_device *dev,
1140 struct comedi_subdevice *s,
1141 struct comedi_insn *insn, unsigned int *data);
1142 static void check_adc_timing(struct comedi_device *dev, struct comedi_cmd *cmd);
1143 static unsigned int get_divisor(unsigned int ns, unsigned int flags);
1144 static void i2c_write(struct comedi_device *dev, unsigned int address,
1145 const uint8_t *data, unsigned int length);
1146 static void caldac_write(struct comedi_device *dev, unsigned int channel,
1147 unsigned int value);
1148 static int caldac_8800_write(struct comedi_device *dev, unsigned int address,
1149 uint8_t value);
1150 /* static int dac_1590_write(struct comedi_device *dev, unsigned int dac_a, unsigned int dac_b); */
1151 static int caldac_i2c_write(struct comedi_device *dev,
1152 unsigned int caldac_channel, unsigned int value);
1153 static void abort_dma(struct comedi_device *dev, unsigned int channel);
1154 static void disable_plx_interrupts(struct comedi_device *dev);
1155 static int set_ai_fifo_size(struct comedi_device *dev,
1156 unsigned int num_samples);
1157 static unsigned int ai_fifo_size(struct comedi_device *dev);
1158 static int set_ai_fifo_segment_length(struct comedi_device *dev,
1159 unsigned int num_entries);
1160 static void disable_ai_pacing(struct comedi_device *dev);
1161 static void disable_ai_interrupts(struct comedi_device *dev);
1162 static void enable_ai_interrupts(struct comedi_device *dev,
1163 const struct comedi_cmd *cmd);
1164 static unsigned int get_ao_divisor(unsigned int ns, unsigned int flags);
1165 static void load_ao_dma(struct comedi_device *dev,
1166 const struct comedi_cmd *cmd);
1167
1168 static unsigned int ai_range_bits_6xxx(const struct comedi_device *dev,
1169 unsigned int range_index)
1170 {
1171 const struct comedi_krange *range =
1172 &board(dev)->ai_range_table->range[range_index];
1173 unsigned int bits = 0;
1174
1175 switch (range->max) {
1176 case 10000000:
1177 bits = 0x000;
1178 break;
1179 case 5000000:
1180 bits = 0x100;
1181 break;
1182 case 2000000:
1183 case 2500000:
1184 bits = 0x200;
1185 break;
1186 case 1000000:
1187 case 1250000:
1188 bits = 0x300;
1189 break;
1190 case 500000:
1191 bits = 0x400;
1192 break;
1193 case 200000:
1194 case 250000:
1195 bits = 0x500;
1196 break;
1197 case 100000:
1198 bits = 0x600;
1199 break;
1200 case 50000:
1201 bits = 0x700;
1202 break;
1203 default:
1204 comedi_error(dev, "bug! in ai_range_bits_6xxx");
1205 break;
1206 }
1207 if (range->min == 0)
1208 bits += 0x900;
1209 return bits;
1210 }
1211
1212 static unsigned int hw_revision(const struct comedi_device *dev,
1213 uint16_t hw_status_bits)
1214 {
1215 if (board(dev)->layout == LAYOUT_4020)
1216 return (hw_status_bits >> 13) & 0x7;
1217
1218 return (hw_status_bits >> 12) & 0xf;
1219 }
1220
1221 static void set_dac_range_bits(struct comedi_device *dev,
1222 volatile uint16_t *bits, unsigned int channel,
1223 unsigned int range)
1224 {
1225 unsigned int code = board(dev)->ao_range_code[range];
1226
1227 if (channel > 1)
1228 comedi_error(dev, "bug! bad channel?");
1229 if (code & ~0x3)
1230 comedi_error(dev, "bug! bad range code?");
1231
1232 *bits &= ~(0x3 << (2 * channel));
1233 *bits |= code << (2 * channel);
1234 };
1235
1236 static inline int ao_cmd_is_supported(const struct pcidas64_board *board)
1237 {
1238 return board->ao_nchan && board->layout != LAYOUT_4020;
1239 }
1240
1241 /* initialize plx9080 chip */
1242 static void init_plx9080(struct comedi_device *dev)
1243 {
1244 struct pcidas64_private *devpriv = dev->private;
1245 uint32_t bits;
1246 void __iomem *plx_iobase = devpriv->plx9080_iobase;
1247
1248 devpriv->plx_control_bits =
1249 readl(devpriv->plx9080_iobase + PLX_CONTROL_REG);
1250
1251 /* plx9080 dump */
1252 DEBUG_PRINT(" plx interrupt status 0x%x\n",
1253 readl(plx_iobase + PLX_INTRCS_REG));
1254 DEBUG_PRINT(" plx id bits 0x%x\n", readl(plx_iobase + PLX_ID_REG));
1255 DEBUG_PRINT(" plx control reg 0x%x\n", devpriv->plx_control_bits);
1256 DEBUG_PRINT(" plx mode/arbitration reg 0x%x\n",
1257 readl(plx_iobase + PLX_MARB_REG));
1258 DEBUG_PRINT(" plx region0 reg 0x%x\n",
1259 readl(plx_iobase + PLX_REGION0_REG));
1260 DEBUG_PRINT(" plx region1 reg 0x%x\n",
1261 readl(plx_iobase + PLX_REGION1_REG));
1262
1263 DEBUG_PRINT(" plx revision 0x%x\n",
1264 readl(plx_iobase + PLX_REVISION_REG));
1265 DEBUG_PRINT(" plx dma channel 0 mode 0x%x\n",
1266 readl(plx_iobase + PLX_DMA0_MODE_REG));
1267 DEBUG_PRINT(" plx dma channel 1 mode 0x%x\n",
1268 readl(plx_iobase + PLX_DMA1_MODE_REG));
1269 DEBUG_PRINT(" plx dma channel 0 pci address 0x%x\n",
1270 readl(plx_iobase + PLX_DMA0_PCI_ADDRESS_REG));
1271 DEBUG_PRINT(" plx dma channel 0 local address 0x%x\n",
1272 readl(plx_iobase + PLX_DMA0_LOCAL_ADDRESS_REG));
1273 DEBUG_PRINT(" plx dma channel 0 transfer size 0x%x\n",
1274 readl(plx_iobase + PLX_DMA0_TRANSFER_SIZE_REG));
1275 DEBUG_PRINT(" plx dma channel 0 descriptor 0x%x\n",
1276 readl(plx_iobase + PLX_DMA0_DESCRIPTOR_REG));
1277 DEBUG_PRINT(" plx dma channel 0 command status 0x%x\n",
1278 readb(plx_iobase + PLX_DMA0_CS_REG));
1279 DEBUG_PRINT(" plx dma channel 0 threshold 0x%x\n",
1280 readl(plx_iobase + PLX_DMA0_THRESHOLD_REG));
1281 DEBUG_PRINT(" plx bigend 0x%x\n", readl(plx_iobase + PLX_BIGEND_REG));
1282
1283 #ifdef __BIG_ENDIAN
1284 bits = BIGEND_DMA0 | BIGEND_DMA1;
1285 #else
1286 bits = 0;
1287 #endif
1288 writel(bits, devpriv->plx9080_iobase + PLX_BIGEND_REG);
1289
1290 disable_plx_interrupts(dev);
1291
1292 abort_dma(dev, 0);
1293 abort_dma(dev, 1);
1294
1295 /* configure dma0 mode */
1296 bits = 0;
1297 /* enable ready input, not sure if this is necessary */
1298 bits |= PLX_DMA_EN_READYIN_BIT;
1299 /* enable bterm, not sure if this is necessary */
1300 bits |= PLX_EN_BTERM_BIT;
1301 /* enable dma chaining */
1302 bits |= PLX_EN_CHAIN_BIT;
1303 /* enable interrupt on dma done (probably don't need this, since chain never finishes) */
1304 bits |= PLX_EN_DMA_DONE_INTR_BIT;
1305 /* don't increment local address during transfers (we are transferring from a fixed fifo register) */
1306 bits |= PLX_LOCAL_ADDR_CONST_BIT;
1307 /* route dma interrupt to pci bus */
1308 bits |= PLX_DMA_INTR_PCI_BIT;
1309 /* enable demand mode */
1310 bits |= PLX_DEMAND_MODE_BIT;
1311 /* enable local burst mode */
1312 bits |= PLX_DMA_LOCAL_BURST_EN_BIT;
1313 /* 4020 uses 32 bit dma */
1314 if (board(dev)->layout == LAYOUT_4020) {
1315 bits |= PLX_LOCAL_BUS_32_WIDE_BITS;
1316 } else { /* localspace0 bus is 16 bits wide */
1317 bits |= PLX_LOCAL_BUS_16_WIDE_BITS;
1318 }
1319 writel(bits, plx_iobase + PLX_DMA1_MODE_REG);
1320 if (ao_cmd_is_supported(board(dev)))
1321 writel(bits, plx_iobase + PLX_DMA0_MODE_REG);
1322
1323 /* enable interrupts on plx 9080 */
1324 devpriv->plx_intcsr_bits |=
1325 ICS_AERR | ICS_PERR | ICS_PIE | ICS_PLIE | ICS_PAIE | ICS_LIE |
1326 ICS_DMA0_E | ICS_DMA1_E;
1327 writel(devpriv->plx_intcsr_bits,
1328 devpriv->plx9080_iobase + PLX_INTRCS_REG);
1329 }
1330
1331 /* Allocate and initialize the subdevice structures.
1332 */
1333 static int setup_subdevices(struct comedi_device *dev)
1334 {
1335 struct pcidas64_private *devpriv = dev->private;
1336 struct comedi_subdevice *s;
1337 void __iomem *dio_8255_iobase;
1338 int i;
1339 int ret;
1340
1341 ret = comedi_alloc_subdevices(dev, 10);
1342 if (ret)
1343 return ret;
1344
1345 s = &dev->subdevices[0];
1346 /* analog input subdevice */
1347 dev->read_subdev = s;
1348 s->type = COMEDI_SUBD_AI;
1349 s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DITHER | SDF_CMD_READ;
1350 if (board(dev)->layout == LAYOUT_60XX)
1351 s->subdev_flags |= SDF_COMMON | SDF_DIFF;
1352 else if (board(dev)->layout == LAYOUT_64XX)
1353 s->subdev_flags |= SDF_DIFF;
1354 /* XXX Number of inputs in differential mode is ignored */
1355 s->n_chan = board(dev)->ai_se_chans;
1356 s->len_chanlist = 0x2000;
1357 s->maxdata = (1 << board(dev)->ai_bits) - 1;
1358 s->range_table = board(dev)->ai_range_table;
1359 s->insn_read = ai_rinsn;
1360 s->insn_config = ai_config_insn;
1361 s->do_cmd = ai_cmd;
1362 s->do_cmdtest = ai_cmdtest;
1363 s->cancel = ai_cancel;
1364 if (board(dev)->layout == LAYOUT_4020) {
1365 uint8_t data;
1366 /* set adc to read from inputs (not internal calibration sources) */
1367 devpriv->i2c_cal_range_bits = adc_src_4020_bits(4);
1368 /* set channels to +-5 volt input ranges */
1369 for (i = 0; i < s->n_chan; i++)
1370 devpriv->i2c_cal_range_bits |= attenuate_bit(i);
1371 data = devpriv->i2c_cal_range_bits;
1372 i2c_write(dev, RANGE_CAL_I2C_ADDR, &data, sizeof(data));
1373 }
1374
1375 /* analog output subdevice */
1376 s = &dev->subdevices[1];
1377 if (board(dev)->ao_nchan) {
1378 s->type = COMEDI_SUBD_AO;
1379 s->subdev_flags =
1380 SDF_READABLE | SDF_WRITABLE | SDF_GROUND | SDF_CMD_WRITE;
1381 s->n_chan = board(dev)->ao_nchan;
1382 s->maxdata = (1 << board(dev)->ao_bits) - 1;
1383 s->range_table = board(dev)->ao_range_table;
1384 s->insn_read = ao_readback_insn;
1385 s->insn_write = ao_winsn;
1386 if (ao_cmd_is_supported(board(dev))) {
1387 dev->write_subdev = s;
1388 s->do_cmdtest = ao_cmdtest;
1389 s->do_cmd = ao_cmd;
1390 s->len_chanlist = board(dev)->ao_nchan;
1391 s->cancel = ao_cancel;
1392 }
1393 } else {
1394 s->type = COMEDI_SUBD_UNUSED;
1395 }
1396
1397 /* digital input */
1398 s = &dev->subdevices[2];
1399 if (board(dev)->layout == LAYOUT_64XX) {
1400 s->type = COMEDI_SUBD_DI;
1401 s->subdev_flags = SDF_READABLE;
1402 s->n_chan = 4;
1403 s->maxdata = 1;
1404 s->range_table = &range_digital;
1405 s->insn_bits = di_rbits;
1406 } else
1407 s->type = COMEDI_SUBD_UNUSED;
1408
1409 /* digital output */
1410 if (board(dev)->layout == LAYOUT_64XX) {
1411 s = &dev->subdevices[3];
1412 s->type = COMEDI_SUBD_DO;
1413 s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
1414 s->n_chan = 4;
1415 s->maxdata = 1;
1416 s->range_table = &range_digital;
1417 s->insn_bits = do_wbits;
1418 } else
1419 s->type = COMEDI_SUBD_UNUSED;
1420
1421 /* 8255 */
1422 s = &dev->subdevices[4];
1423 if (board(dev)->has_8255) {
1424 if (board(dev)->layout == LAYOUT_4020) {
1425 dio_8255_iobase =
1426 devpriv->main_iobase + I8255_4020_REG;
1427 subdev_8255_init(dev, s, dio_callback_4020,
1428 (unsigned long)dio_8255_iobase);
1429 } else {
1430 dio_8255_iobase =
1431 devpriv->dio_counter_iobase + DIO_8255_OFFSET;
1432 subdev_8255_init(dev, s, dio_callback,
1433 (unsigned long)dio_8255_iobase);
1434 }
1435 } else
1436 s->type = COMEDI_SUBD_UNUSED;
1437
1438 /* 8 channel dio for 60xx */
1439 s = &dev->subdevices[5];
1440 if (board(dev)->layout == LAYOUT_60XX) {
1441 s->type = COMEDI_SUBD_DIO;
1442 s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
1443 s->n_chan = 8;
1444 s->maxdata = 1;
1445 s->range_table = &range_digital;
1446 s->insn_config = dio_60xx_config_insn;
1447 s->insn_bits = dio_60xx_wbits;
1448 } else
1449 s->type = COMEDI_SUBD_UNUSED;
1450
1451 /* caldac */
1452 s = &dev->subdevices[6];
1453 s->type = COMEDI_SUBD_CALIB;
1454 s->subdev_flags = SDF_READABLE | SDF_WRITABLE | SDF_INTERNAL;
1455 s->n_chan = 8;
1456 if (board(dev)->layout == LAYOUT_4020)
1457 s->maxdata = 0xfff;
1458 else
1459 s->maxdata = 0xff;
1460 s->insn_read = calib_read_insn;
1461 s->insn_write = calib_write_insn;
1462 for (i = 0; i < s->n_chan; i++)
1463 caldac_write(dev, i, s->maxdata / 2);
1464
1465 /* 2 channel ad8402 potentiometer */
1466 s = &dev->subdevices[7];
1467 if (board(dev)->layout == LAYOUT_64XX) {
1468 s->type = COMEDI_SUBD_CALIB;
1469 s->subdev_flags = SDF_READABLE | SDF_WRITABLE | SDF_INTERNAL;
1470 s->n_chan = 2;
1471 s->insn_read = ad8402_read_insn;
1472 s->insn_write = ad8402_write_insn;
1473 s->maxdata = 0xff;
1474 for (i = 0; i < s->n_chan; i++)
1475 ad8402_write(dev, i, s->maxdata / 2);
1476 } else
1477 s->type = COMEDI_SUBD_UNUSED;
1478
1479 /* serial EEPROM, if present */
1480 s = &dev->subdevices[8];
1481 if (readl(devpriv->plx9080_iobase + PLX_CONTROL_REG) & CTL_EECHK) {
1482 s->type = COMEDI_SUBD_MEMORY;
1483 s->subdev_flags = SDF_READABLE | SDF_INTERNAL;
1484 s->n_chan = 128;
1485 s->maxdata = 0xffff;
1486 s->insn_read = eeprom_read_insn;
1487 } else
1488 s->type = COMEDI_SUBD_UNUSED;
1489
1490 /* user counter subd XXX */
1491 s = &dev->subdevices[9];
1492 s->type = COMEDI_SUBD_UNUSED;
1493
1494 return 0;
1495 }
1496
1497 static void disable_plx_interrupts(struct comedi_device *dev)
1498 {
1499 struct pcidas64_private *devpriv = dev->private;
1500
1501 devpriv->plx_intcsr_bits = 0;
1502 writel(devpriv->plx_intcsr_bits,
1503 devpriv->plx9080_iobase + PLX_INTRCS_REG);
1504 }
1505
1506 static void init_stc_registers(struct comedi_device *dev)
1507 {
1508 struct pcidas64_private *devpriv = dev->private;
1509 uint16_t bits;
1510 unsigned long flags;
1511
1512 spin_lock_irqsave(&dev->spinlock, flags);
1513
1514 /* bit should be set for 6025, although docs say boards with <= 16 chans should be cleared XXX */
1515 if (1)
1516 devpriv->adc_control1_bits |= ADC_QUEUE_CONFIG_BIT;
1517 writew(devpriv->adc_control1_bits,
1518 devpriv->main_iobase + ADC_CONTROL1_REG);
1519
1520 /* 6402/16 manual says this register must be initialized to 0xff? */
1521 writew(0xff, devpriv->main_iobase + ADC_SAMPLE_INTERVAL_UPPER_REG);
1522
1523 bits = SLOW_DAC_BIT | DMA_CH_SELECT_BIT;
1524 if (board(dev)->layout == LAYOUT_4020)
1525 bits |= INTERNAL_CLOCK_4020_BITS;
1526 devpriv->hw_config_bits |= bits;
1527 writew(devpriv->hw_config_bits,
1528 devpriv->main_iobase + HW_CONFIG_REG);
1529
1530 writew(0, devpriv->main_iobase + DAQ_SYNC_REG);
1531 writew(0, devpriv->main_iobase + CALIBRATION_REG);
1532
1533 spin_unlock_irqrestore(&dev->spinlock, flags);
1534
1535 /* set fifos to maximum size */
1536 devpriv->fifo_size_bits |= DAC_FIFO_BITS;
1537 set_ai_fifo_segment_length(dev,
1538 board(dev)->ai_fifo->max_segment_length);
1539
1540 devpriv->dac_control1_bits = DAC_OUTPUT_ENABLE_BIT;
1541 devpriv->intr_enable_bits = /* EN_DAC_INTR_SRC_BIT | DAC_INTR_QEMPTY_BITS | */
1542 EN_DAC_DONE_INTR_BIT | EN_DAC_UNDERRUN_BIT;
1543 writew(devpriv->intr_enable_bits,
1544 devpriv->main_iobase + INTR_ENABLE_REG);
1545
1546 disable_ai_pacing(dev);
1547 };
1548
1549 static int alloc_and_init_dma_members(struct comedi_device *dev)
1550 {
1551 struct pci_dev *pcidev = comedi_to_pci_dev(dev);
1552 struct pcidas64_private *devpriv = dev->private;
1553 int i;
1554
1555 /* alocate pci dma buffers */
1556 for (i = 0; i < ai_dma_ring_count(board(dev)); i++) {
1557 devpriv->ai_buffer[i] =
1558 pci_alloc_consistent(pcidev, DMA_BUFFER_SIZE,
1559 &devpriv->ai_buffer_bus_addr[i]);
1560 if (devpriv->ai_buffer[i] == NULL)
1561 return -ENOMEM;
1562
1563 }
1564 for (i = 0; i < AO_DMA_RING_COUNT; i++) {
1565 if (ao_cmd_is_supported(board(dev))) {
1566 devpriv->ao_buffer[i] =
1567 pci_alloc_consistent(pcidev,
1568 DMA_BUFFER_SIZE,
1569 &devpriv->
1570 ao_buffer_bus_addr[i]);
1571 if (devpriv->ao_buffer[i] == NULL)
1572 return -ENOMEM;
1573
1574 }
1575 }
1576 /* allocate dma descriptors */
1577 devpriv->ai_dma_desc =
1578 pci_alloc_consistent(pcidev,
1579 sizeof(struct plx_dma_desc) *
1580 ai_dma_ring_count(board(dev)),
1581 &devpriv->ai_dma_desc_bus_addr);
1582 if (devpriv->ai_dma_desc == NULL)
1583 return -ENOMEM;
1584
1585 DEBUG_PRINT("ai dma descriptors start at bus addr 0x%x\n",
1586 devpriv->ai_dma_desc_bus_addr);
1587 if (ao_cmd_is_supported(board(dev))) {
1588 devpriv->ao_dma_desc =
1589 pci_alloc_consistent(pcidev,
1590 sizeof(struct plx_dma_desc) *
1591 AO_DMA_RING_COUNT,
1592 &devpriv->ao_dma_desc_bus_addr);
1593 if (devpriv->ao_dma_desc == NULL)
1594 return -ENOMEM;
1595
1596 DEBUG_PRINT("ao dma descriptors start at bus addr 0x%x\n",
1597 devpriv->ao_dma_desc_bus_addr);
1598 }
1599 /* initialize dma descriptors */
1600 for (i = 0; i < ai_dma_ring_count(board(dev)); i++) {
1601 devpriv->ai_dma_desc[i].pci_start_addr =
1602 cpu_to_le32(devpriv->ai_buffer_bus_addr[i]);
1603 if (board(dev)->layout == LAYOUT_4020)
1604 devpriv->ai_dma_desc[i].local_start_addr =
1605 cpu_to_le32(devpriv->local1_iobase +
1606 ADC_FIFO_REG);
1607 else
1608 devpriv->ai_dma_desc[i].local_start_addr =
1609 cpu_to_le32(devpriv->local0_iobase +
1610 ADC_FIFO_REG);
1611 devpriv->ai_dma_desc[i].transfer_size = cpu_to_le32(0);
1612 devpriv->ai_dma_desc[i].next =
1613 cpu_to_le32((devpriv->ai_dma_desc_bus_addr + ((i +
1614 1) %
1615 ai_dma_ring_count
1616 (board
1617 (dev))) *
1618 sizeof(devpriv->ai_dma_desc[0])) |
1619 PLX_DESC_IN_PCI_BIT | PLX_INTR_TERM_COUNT |
1620 PLX_XFER_LOCAL_TO_PCI);
1621 }
1622 if (ao_cmd_is_supported(board(dev))) {
1623 for (i = 0; i < AO_DMA_RING_COUNT; i++) {
1624 devpriv->ao_dma_desc[i].pci_start_addr =
1625 cpu_to_le32(devpriv->ao_buffer_bus_addr[i]);
1626 devpriv->ao_dma_desc[i].local_start_addr =
1627 cpu_to_le32(devpriv->local0_iobase +
1628 DAC_FIFO_REG);
1629 devpriv->ao_dma_desc[i].transfer_size =
1630 cpu_to_le32(0);
1631 devpriv->ao_dma_desc[i].next =
1632 cpu_to_le32((devpriv->ao_dma_desc_bus_addr +
1633 ((i + 1) % (AO_DMA_RING_COUNT)) *
1634 sizeof(devpriv->ao_dma_desc[0])) |
1635 PLX_DESC_IN_PCI_BIT |
1636 PLX_INTR_TERM_COUNT);
1637 }
1638 }
1639 return 0;
1640 }
1641
1642 static inline void warn_external_queue(struct comedi_device *dev)
1643 {
1644 comedi_error(dev,
1645 "AO command and AI external channel queue cannot be used simultaneously.");
1646 comedi_error(dev,
1647 "Use internal AI channel queue (channels must be consecutive and use same range/aref)");
1648 }
1649
1650 static struct pci_dev *cb_pcidas64_find_pci_dev(struct comedi_device *dev,
1651 struct comedi_devconfig *it)
1652 {
1653 struct pci_dev *pcidev = NULL;
1654 int bus = it->options[0];
1655 int slot = it->options[1];
1656 int i;
1657
1658 for_each_pci_dev(pcidev) {
1659 if (bus || slot) {
1660 if (bus != pcidev->bus->number ||
1661 slot != PCI_SLOT(pcidev->devfn))
1662 continue;
1663 }
1664 if (pcidev->vendor != PCI_VENDOR_ID_COMPUTERBOARDS)
1665 continue;
1666
1667 for (i = 0; i < ARRAY_SIZE(pcidas64_boards); i++) {
1668 if (pcidas64_boards[i].device_id != pcidev->device)
1669 continue;
1670 dev->board_ptr = pcidas64_boards + i;
1671 return pcidev;
1672 }
1673 }
1674 dev_err(dev->class_dev,
1675 "No supported board found! (req. bus %d, slot %d)\n",
1676 bus, slot);
1677 return NULL;
1678 }
1679
1680 /*
1681 * Attach is called by the Comedi core to configure the driver
1682 * for a particular board.
1683 */
1684 static int attach(struct comedi_device *dev, struct comedi_devconfig *it)
1685 {
1686 struct pcidas64_private *devpriv;
1687 struct pci_dev *pcidev;
1688 uint32_t local_range, local_decode;
1689 int retval;
1690
1691 retval = alloc_private(dev, sizeof(*devpriv));
1692 if (retval)
1693 return retval;
1694 devpriv = dev->private;
1695
1696 pcidev = cb_pcidas64_find_pci_dev(dev, it);
1697 if (!pcidev)
1698 return -EIO;
1699 comedi_set_hw_dev(dev, &pcidev->dev);
1700
1701 if (comedi_pci_enable(pcidev, dev->driver->driver_name)) {
1702 dev_warn(dev->class_dev,
1703 "failed to enable PCI device and request regions\n");
1704 return -EIO;
1705 }
1706 pci_set_master(pcidev);
1707
1708 /* Initialize dev->board_name */
1709 dev->board_name = board(dev)->name;
1710
1711 dev->iobase = pci_resource_start(pcidev, MAIN_BADDRINDEX);
1712
1713 devpriv->plx9080_phys_iobase =
1714 pci_resource_start(pcidev, PLX9080_BADDRINDEX);
1715 devpriv->main_phys_iobase = dev->iobase;
1716 devpriv->dio_counter_phys_iobase =
1717 pci_resource_start(pcidev, DIO_COUNTER_BADDRINDEX);
1718
1719 /* remap, won't work with 2.0 kernels but who cares */
1720 devpriv->plx9080_iobase = ioremap(devpriv->plx9080_phys_iobase,
1721 pci_resource_len(pcidev,
1722 PLX9080_BADDRINDEX));
1723 devpriv->main_iobase =
1724 ioremap(devpriv->main_phys_iobase,
1725 pci_resource_len(pcidev, MAIN_BADDRINDEX));
1726 devpriv->dio_counter_iobase =
1727 ioremap(devpriv->dio_counter_phys_iobase,
1728 pci_resource_len(pcidev, DIO_COUNTER_BADDRINDEX));
1729
1730 if (!devpriv->plx9080_iobase || !devpriv->main_iobase
1731 || !devpriv->dio_counter_iobase) {
1732 dev_warn(dev->class_dev, "failed to remap io memory\n");
1733 return -ENOMEM;
1734 }
1735
1736 DEBUG_PRINT(" plx9080 remapped to 0x%p\n", devpriv->plx9080_iobase);
1737 DEBUG_PRINT(" main remapped to 0x%p\n", devpriv->main_iobase);
1738 DEBUG_PRINT(" diocounter remapped to 0x%p\n",
1739 devpriv->dio_counter_iobase);
1740
1741 /* figure out what local addresses are */
1742 local_range =
1743 readl(devpriv->plx9080_iobase + PLX_LAS0RNG_REG) & LRNG_MEM_MASK;
1744 local_decode =
1745 readl(devpriv->plx9080_iobase +
1746 PLX_LAS0MAP_REG) & local_range & LMAP_MEM_MASK;
1747 devpriv->local0_iobase =
1748 ((uint32_t) devpriv->main_phys_iobase & ~local_range) |
1749 local_decode;
1750 local_range =
1751 readl(devpriv->plx9080_iobase + PLX_LAS1RNG_REG) & LRNG_MEM_MASK;
1752 local_decode =
1753 readl(devpriv->plx9080_iobase +
1754 PLX_LAS1MAP_REG) & local_range & LMAP_MEM_MASK;
1755 devpriv->local1_iobase =
1756 ((uint32_t) devpriv->dio_counter_phys_iobase & ~local_range) |
1757 local_decode;
1758
1759 DEBUG_PRINT(" local 0 io addr 0x%x\n", devpriv->local0_iobase);
1760 DEBUG_PRINT(" local 1 io addr 0x%x\n", devpriv->local1_iobase);
1761
1762 retval = alloc_and_init_dma_members(dev);
1763 if (retval < 0)
1764 return retval;
1765
1766 devpriv->hw_revision =
1767 hw_revision(dev, readw(devpriv->main_iobase + HW_STATUS_REG));
1768 dev_dbg(dev->class_dev, "stc hardware revision %i\n",
1769 devpriv->hw_revision);
1770 init_plx9080(dev);
1771 init_stc_registers(dev);
1772 /* get irq */
1773 if (request_irq(pcidev->irq, handle_interrupt, IRQF_SHARED,
1774 "cb_pcidas64", dev)) {
1775 dev_dbg(dev->class_dev, "unable to allocate irq %u\n",
1776 pcidev->irq);
1777 return -EINVAL;
1778 }
1779 dev->irq = pcidev->irq;
1780 dev_dbg(dev->class_dev, "irq %u\n", dev->irq);
1781
1782 retval = setup_subdevices(dev);
1783 if (retval < 0)
1784 return retval;
1785
1786
1787 return 0;
1788 }
1789
1790 static void detach(struct comedi_device *dev)
1791 {
1792 struct pci_dev *pcidev = comedi_to_pci_dev(dev);
1793 struct pcidas64_private *devpriv = dev->private;
1794 unsigned int i;
1795
1796 if (dev->irq)
1797 free_irq(dev->irq, dev);
1798 if (devpriv) {
1799 if (pcidev) {
1800 if (devpriv->plx9080_iobase) {
1801 disable_plx_interrupts(dev);
1802 iounmap(devpriv->plx9080_iobase);
1803 }
1804 if (devpriv->main_iobase)
1805 iounmap(devpriv->main_iobase);
1806 if (devpriv->dio_counter_iobase)
1807 iounmap(devpriv->dio_counter_iobase);
1808 /* free pci dma buffers */
1809 for (i = 0; i < ai_dma_ring_count(board(dev)); i++) {
1810 if (devpriv->ai_buffer[i])
1811 pci_free_consistent(pcidev,
1812 DMA_BUFFER_SIZE,
1813 devpriv->ai_buffer[i],
1814 devpriv->ai_buffer_bus_addr[i]);
1815 }
1816 for (i = 0; i < AO_DMA_RING_COUNT; i++) {
1817 if (devpriv->ao_buffer[i])
1818 pci_free_consistent(pcidev,
1819 DMA_BUFFER_SIZE,
1820 devpriv->ao_buffer[i],
1821 devpriv->ao_buffer_bus_addr[i]);
1822 }
1823 /* free dma descriptors */
1824 if (devpriv->ai_dma_desc)
1825 pci_free_consistent(pcidev,
1826 sizeof(struct plx_dma_desc) *
1827 ai_dma_ring_count(board(dev)),
1828 devpriv->ai_dma_desc,
1829 devpriv->ai_dma_desc_bus_addr);
1830 if (devpriv->ao_dma_desc)
1831 pci_free_consistent(pcidev,
1832 sizeof(struct plx_dma_desc) *
1833 AO_DMA_RING_COUNT,
1834 devpriv->ao_dma_desc,
1835 devpriv->ao_dma_desc_bus_addr);
1836 }
1837 }
1838 if (dev->subdevices)
1839 subdev_8255_cleanup(dev, &dev->subdevices[4]);
1840 if (pcidev) {
1841 if (dev->iobase)
1842 comedi_pci_disable(pcidev);
1843
1844 pci_dev_put(pcidev);
1845 }
1846 }
1847
1848 static int ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
1849 struct comedi_insn *insn, unsigned int *data)
1850 {
1851 struct pcidas64_private *devpriv = dev->private;
1852 unsigned int bits = 0, n, i;
1853 unsigned int channel, range, aref;
1854 unsigned long flags;
1855 static const int timeout = 100;
1856
1857 DEBUG_PRINT("chanspec 0x%x\n", insn->chanspec);
1858 channel = CR_CHAN(insn->chanspec);
1859 range = CR_RANGE(insn->chanspec);
1860 aref = CR_AREF(insn->chanspec);
1861
1862 /* disable card's analog input interrupt sources and pacing */
1863 /* 4020 generates dac done interrupts even though they are disabled */
1864 disable_ai_pacing(dev);
1865
1866 spin_lock_irqsave(&dev->spinlock, flags);
1867 if (insn->chanspec & CR_ALT_FILTER)
1868 devpriv->adc_control1_bits |= ADC_DITHER_BIT;
1869 else
1870 devpriv->adc_control1_bits &= ~ADC_DITHER_BIT;
1871 writew(devpriv->adc_control1_bits,
1872 devpriv->main_iobase + ADC_CONTROL1_REG);
1873 spin_unlock_irqrestore(&dev->spinlock, flags);
1874
1875 if (board(dev)->layout != LAYOUT_4020) {
1876 /* use internal queue */
1877 devpriv->hw_config_bits &= ~EXT_QUEUE_BIT;
1878 writew(devpriv->hw_config_bits,
1879 devpriv->main_iobase + HW_CONFIG_REG);
1880
1881 /* ALT_SOURCE is internal calibration reference */
1882 if (insn->chanspec & CR_ALT_SOURCE) {
1883 unsigned int cal_en_bit;
1884
1885 DEBUG_PRINT("reading calibration source\n");
1886 if (board(dev)->layout == LAYOUT_60XX)
1887 cal_en_bit = CAL_EN_60XX_BIT;
1888 else
1889 cal_en_bit = CAL_EN_64XX_BIT;
1890 /* select internal reference source to connect to channel 0 */
1891 writew(cal_en_bit |
1892 adc_src_bits(devpriv->calibration_source),
1893 devpriv->main_iobase + CALIBRATION_REG);
1894 } else {
1895 /* make sure internal calibration source is turned off */
1896 writew(0, devpriv->main_iobase + CALIBRATION_REG);
1897 }
1898 /* load internal queue */
1899 bits = 0;
1900 /* set gain */
1901 bits |= ai_range_bits_6xxx(dev, CR_RANGE(insn->chanspec));
1902 /* set single-ended / differential */
1903 bits |= se_diff_bit_6xxx(dev, aref == AREF_DIFF);
1904 if (aref == AREF_COMMON)
1905 bits |= ADC_COMMON_BIT;
1906 bits |= adc_chan_bits(channel);
1907 /* set stop channel */
1908 writew(adc_chan_bits(channel),
1909 devpriv->main_iobase + ADC_QUEUE_HIGH_REG);
1910 /* set start channel, and rest of settings */
1911 writew(bits, devpriv->main_iobase + ADC_QUEUE_LOAD_REG);
1912 } else {
1913 uint8_t old_cal_range_bits = devpriv->i2c_cal_range_bits;
1914
1915 devpriv->i2c_cal_range_bits &= ~ADC_SRC_4020_MASK;
1916 if (insn->chanspec & CR_ALT_SOURCE) {
1917 DEBUG_PRINT("reading calibration source\n");
1918 devpriv->i2c_cal_range_bits |=
1919 adc_src_4020_bits(devpriv->calibration_source);
1920 } else { /* select BNC inputs */
1921 devpriv->i2c_cal_range_bits |= adc_src_4020_bits(4);
1922 }
1923 /* select range */
1924 if (range == 0)
1925 devpriv->i2c_cal_range_bits |= attenuate_bit(channel);
1926 else
1927 devpriv->i2c_cal_range_bits &=
1928 ~attenuate_bit(channel);
1929 /* update calibration/range i2c register only if necessary, as it is very slow */
1930 if (old_cal_range_bits != devpriv->i2c_cal_range_bits) {
1931 uint8_t i2c_data = devpriv->i2c_cal_range_bits;
1932 i2c_write(dev, RANGE_CAL_I2C_ADDR, &i2c_data,
1933 sizeof(i2c_data));
1934 }
1935
1936 /* 4020 manual asks that sample interval register to be set before writing to convert register.
1937 * Using somewhat arbitrary setting of 4 master clock ticks = 0.1 usec */
1938 writew(0,
1939 devpriv->main_iobase + ADC_SAMPLE_INTERVAL_UPPER_REG);
1940 writew(2,
1941 devpriv->main_iobase + ADC_SAMPLE_INTERVAL_LOWER_REG);
1942 }
1943
1944 for (n = 0; n < insn->n; n++) {
1945
1946 /* clear adc buffer (inside loop for 4020 sake) */
1947 writew(0, devpriv->main_iobase + ADC_BUFFER_CLEAR_REG);
1948
1949 /* trigger conversion, bits sent only matter for 4020 */
1950 writew(adc_convert_chan_4020_bits(CR_CHAN(insn->chanspec)),
1951 devpriv->main_iobase + ADC_CONVERT_REG);
1952
1953 /* wait for data */
1954 for (i = 0; i < timeout; i++) {
1955 bits = readw(devpriv->main_iobase + HW_STATUS_REG);
1956 DEBUG_PRINT(" pipe bits 0x%x\n", pipe_full_bits(bits));
1957 if (board(dev)->layout == LAYOUT_4020) {
1958 if (readw(devpriv->main_iobase +
1959 ADC_WRITE_PNTR_REG))
1960 break;
1961 } else {
1962 if (pipe_full_bits(bits))
1963 break;
1964 }
1965 udelay(1);
1966 }
1967 DEBUG_PRINT(" looped %i times waiting for data\n", i);
1968 if (i == timeout) {
1969 comedi_error(dev, " analog input read insn timed out");
1970 printk(" status 0x%x\n", bits);
1971 return -ETIME;
1972 }
1973 if (board(dev)->layout == LAYOUT_4020)
1974 data[n] =
1975 readl(devpriv->dio_counter_iobase +
1976 ADC_FIFO_REG) & 0xffff;
1977 else
1978 data[n] =
1979 readw(devpriv->main_iobase + PIPE1_READ_REG);
1980 }
1981
1982 return n;
1983 }
1984
1985 static int ai_config_calibration_source(struct comedi_device *dev,
1986 unsigned int *data)
1987 {
1988 struct pcidas64_private *devpriv = dev->private;
1989 unsigned int source = data[1];
1990 int num_calibration_sources;
1991
1992 if (board(dev)->layout == LAYOUT_60XX)
1993 num_calibration_sources = 16;
1994 else
1995 num_calibration_sources = 8;
1996 if (source >= num_calibration_sources) {
1997 dev_dbg(dev->class_dev, "invalid calibration source: %i\n",
1998 source);
1999 return -EINVAL;
2000 }
2001
2002 DEBUG_PRINT("setting calibration source to %i\n", source);
2003 devpriv->calibration_source = source;
2004
2005 return 2;
2006 }
2007
2008 static int ai_config_block_size(struct comedi_device *dev, unsigned int *data)
2009 {
2010 int fifo_size;
2011 const struct hw_fifo_info *const fifo = board(dev)->ai_fifo;
2012 unsigned int block_size, requested_block_size;
2013 int retval;
2014
2015 requested_block_size = data[1];
2016
2017 if (requested_block_size) {
2018 fifo_size =
2019 requested_block_size * fifo->num_segments / bytes_in_sample;
2020
2021 retval = set_ai_fifo_size(dev, fifo_size);
2022 if (retval < 0)
2023 return retval;
2024
2025 }
2026
2027 block_size = ai_fifo_size(dev) / fifo->num_segments * bytes_in_sample;
2028
2029 data[1] = block_size;
2030
2031 return 2;
2032 }
2033
2034 static int ai_config_master_clock_4020(struct comedi_device *dev,
2035 unsigned int *data)
2036 {
2037 struct pcidas64_private *devpriv = dev->private;
2038 unsigned int divisor = data[4];
2039 int retval = 0;
2040
2041 if (divisor < 2) {
2042 divisor = 2;
2043 retval = -EAGAIN;
2044 }
2045
2046 switch (data[1]) {
2047 case COMEDI_EV_SCAN_BEGIN:
2048 devpriv->ext_clock.divisor = divisor;
2049 devpriv->ext_clock.chanspec = data[2];
2050 break;
2051 default:
2052 return -EINVAL;
2053 break;
2054 }
2055
2056 data[4] = divisor;
2057
2058 return retval ? retval : 5;
2059 }
2060
2061 /* XXX could add support for 60xx series */
2062 static int ai_config_master_clock(struct comedi_device *dev, unsigned int *data)
2063 {
2064
2065 switch (board(dev)->layout) {
2066 case LAYOUT_4020:
2067 return ai_config_master_clock_4020(dev, data);
2068 break;
2069 default:
2070 return -EINVAL;
2071 break;
2072 }
2073
2074 return -EINVAL;
2075 }
2076
2077 static int ai_config_insn(struct comedi_device *dev, struct comedi_subdevice *s,
2078 struct comedi_insn *insn, unsigned int *data)
2079 {
2080 int id = data[0];
2081
2082 switch (id) {
2083 case INSN_CONFIG_ALT_SOURCE:
2084 return ai_config_calibration_source(dev, data);
2085 break;
2086 case INSN_CONFIG_BLOCK_SIZE:
2087 return ai_config_block_size(dev, data);
2088 break;
2089 case INSN_CONFIG_TIMER_1:
2090 return ai_config_master_clock(dev, data);
2091 break;
2092 default:
2093 return -EINVAL;
2094 break;
2095 }
2096 return -EINVAL;
2097 }
2098
2099 static int ai_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s,
2100 struct comedi_cmd *cmd)
2101 {
2102 int err = 0;
2103 unsigned int tmp_arg, tmp_arg2;
2104 int i;
2105 int aref;
2106 unsigned int triggers;
2107
2108 /* Step 1 : check if triggers are trivially valid */
2109
2110 err |= cfc_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_EXT);
2111
2112 triggers = TRIG_TIMER;
2113 if (board(dev)->layout == LAYOUT_4020)
2114 triggers |= TRIG_OTHER;
2115 else
2116 triggers |= TRIG_FOLLOW;
2117 err |= cfc_check_trigger_src(&cmd->scan_begin_src, triggers);
2118
2119 triggers = TRIG_TIMER;
2120 if (board(dev)->layout == LAYOUT_4020)
2121 triggers |= TRIG_NOW;
2122 else
2123 triggers |= TRIG_EXT;
2124 err |= cfc_check_trigger_src(&cmd->convert_src, triggers);
2125
2126 err |= cfc_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
2127 err |= cfc_check_trigger_src(&cmd->stop_src,
2128 TRIG_COUNT | TRIG_EXT | TRIG_NONE);
2129
2130 if (err)
2131 return 1;
2132
2133 /* Step 2a : make sure trigger sources are unique */
2134
2135 err |= cfc_check_trigger_is_unique(cmd->start_src);
2136 err |= cfc_check_trigger_is_unique(cmd->scan_begin_src);
2137 err |= cfc_check_trigger_is_unique(cmd->convert_src);
2138 err |= cfc_check_trigger_is_unique(cmd->stop_src);
2139
2140 /* Step 2b : and mutually compatible */
2141
2142 if (cmd->convert_src == TRIG_EXT && cmd->scan_begin_src == TRIG_TIMER)
2143 err |= -EINVAL;
2144 if (cmd->stop_src != TRIG_COUNT &&
2145 cmd->stop_src != TRIG_NONE && cmd->stop_src != TRIG_EXT)
2146 err |= -EINVAL;
2147
2148 if (err)
2149 return 2;
2150
2151 /* step 3: make sure arguments are trivially compatible */
2152
2153 if (cmd->convert_src == TRIG_TIMER) {
2154 if (board(dev)->layout == LAYOUT_4020) {
2155 if (cmd->convert_arg) {
2156 cmd->convert_arg = 0;
2157 err++;
2158 }
2159 } else {
2160 if (cmd->convert_arg < board(dev)->ai_speed) {
2161 cmd->convert_arg = board(dev)->ai_speed;
2162 err++;
2163 }
2164 if (cmd->scan_begin_src == TRIG_TIMER) {
2165 /* if scans are timed faster than conversion rate allows */
2166 if (cmd->convert_arg * cmd->chanlist_len >
2167 cmd->scan_begin_arg) {
2168 cmd->scan_begin_arg =
2169 cmd->convert_arg *
2170 cmd->chanlist_len;
2171 err++;
2172 }
2173 }
2174 }
2175 }
2176
2177 if (!cmd->chanlist_len) {
2178 cmd->chanlist_len = 1;
2179 err++;
2180 }
2181 if (cmd->scan_end_arg != cmd->chanlist_len) {
2182 cmd->scan_end_arg = cmd->chanlist_len;
2183 err++;
2184 }
2185
2186 switch (cmd->stop_src) {
2187 case TRIG_EXT:
2188 break;
2189 case TRIG_COUNT:
2190 if (!cmd->stop_arg) {
2191 cmd->stop_arg = 1;
2192 err++;
2193 }
2194 break;
2195 case TRIG_NONE:
2196 if (cmd->stop_arg != 0) {
2197 cmd->stop_arg = 0;
2198 err++;
2199 }
2200 break;
2201 default:
2202 break;
2203 }
2204
2205 if (err)
2206 return 3;
2207
2208 /* step 4: fix up any arguments */
2209
2210 if (cmd->convert_src == TRIG_TIMER) {
2211 tmp_arg = cmd->convert_arg;
2212 tmp_arg2 = cmd->scan_begin_arg;
2213 check_adc_timing(dev, cmd);
2214 if (tmp_arg != cmd->convert_arg)
2215 err++;
2216 if (tmp_arg2 != cmd->scan_begin_arg)
2217 err++;
2218 }
2219
2220 if (err)
2221 return 4;
2222
2223 /* make sure user is doesn't change analog reference mid chanlist */
2224 if (cmd->chanlist) {
2225 aref = CR_AREF(cmd->chanlist[0]);
2226 for (i = 1; i < cmd->chanlist_len; i++) {
2227 if (aref != CR_AREF(cmd->chanlist[i])) {
2228 comedi_error(dev,
2229 "all elements in chanlist must use the same analog reference");
2230 err++;
2231 break;
2232 }
2233 }
2234 /* check 4020 chanlist */
2235 if (board(dev)->layout == LAYOUT_4020) {
2236 unsigned int first_channel = CR_CHAN(cmd->chanlist[0]);
2237 for (i = 1; i < cmd->chanlist_len; i++) {
2238 if (CR_CHAN(cmd->chanlist[i]) !=
2239 first_channel + i) {
2240 comedi_error(dev,
2241 "chanlist must use consecutive channels");
2242 err++;
2243 break;
2244 }
2245 }
2246 if (cmd->chanlist_len == 3) {
2247 comedi_error(dev,
2248 "chanlist cannot be 3 channels long, use 1, 2, or 4 channels");
2249 err++;
2250 }
2251 }
2252 }
2253
2254 if (err)
2255 return 5;
2256
2257 return 0;
2258 }
2259
2260 static int use_hw_sample_counter(struct comedi_cmd *cmd)
2261 {
2262 /* disable for now until I work out a race */
2263 return 0;
2264
2265 if (cmd->stop_src == TRIG_COUNT && cmd->stop_arg <= max_counter_value)
2266 return 1;
2267 else
2268 return 0;
2269 }
2270
2271 static void setup_sample_counters(struct comedi_device *dev,
2272 struct comedi_cmd *cmd)
2273 {
2274 struct pcidas64_private *devpriv = dev->private;
2275
2276 if (cmd->stop_src == TRIG_COUNT) {
2277 /* set software count */
2278 devpriv->ai_count = cmd->stop_arg * cmd->chanlist_len;
2279 }
2280 /* load hardware conversion counter */
2281 if (use_hw_sample_counter(cmd)) {
2282 writew(cmd->stop_arg & 0xffff,
2283 devpriv->main_iobase + ADC_COUNT_LOWER_REG);
2284 writew((cmd->stop_arg >> 16) & 0xff,
2285 devpriv->main_iobase + ADC_COUNT_UPPER_REG);
2286 } else {
2287 writew(1, devpriv->main_iobase + ADC_COUNT_LOWER_REG);
2288 }
2289 }
2290
2291 static inline unsigned int dma_transfer_size(struct comedi_device *dev)
2292 {
2293 struct pcidas64_private *devpriv = dev->private;
2294 unsigned int num_samples;
2295
2296 num_samples =
2297 devpriv->ai_fifo_segment_length *
2298 board(dev)->ai_fifo->sample_packing_ratio;
2299 if (num_samples > DMA_BUFFER_SIZE / sizeof(uint16_t))
2300 num_samples = DMA_BUFFER_SIZE / sizeof(uint16_t);
2301
2302 return num_samples;
2303 }
2304
2305 static void disable_ai_pacing(struct comedi_device *dev)
2306 {
2307 struct pcidas64_private *devpriv = dev->private;
2308 unsigned long flags;
2309
2310 disable_ai_interrupts(dev);
2311
2312 spin_lock_irqsave(&dev->spinlock, flags);
2313 devpriv->adc_control1_bits &= ~ADC_SW_GATE_BIT;
2314 writew(devpriv->adc_control1_bits,
2315 devpriv->main_iobase + ADC_CONTROL1_REG);
2316 spin_unlock_irqrestore(&dev->spinlock, flags);
2317
2318 /* disable pacing, triggering, etc */
2319 writew(ADC_DMA_DISABLE_BIT | ADC_SOFT_GATE_BITS | ADC_GATE_LEVEL_BIT,
2320 devpriv->main_iobase + ADC_CONTROL0_REG);
2321 }
2322
2323 static void disable_ai_interrupts(struct comedi_device *dev)
2324 {
2325 struct pcidas64_private *devpriv = dev->private;
2326 unsigned long flags;
2327
2328 spin_lock_irqsave(&dev->spinlock, flags);
2329 devpriv->intr_enable_bits &=
2330 ~EN_ADC_INTR_SRC_BIT & ~EN_ADC_DONE_INTR_BIT &
2331 ~EN_ADC_ACTIVE_INTR_BIT & ~EN_ADC_STOP_INTR_BIT &
2332 ~EN_ADC_OVERRUN_BIT & ~ADC_INTR_SRC_MASK;
2333 writew(devpriv->intr_enable_bits,
2334 devpriv->main_iobase + INTR_ENABLE_REG);
2335 spin_unlock_irqrestore(&dev->spinlock, flags);
2336
2337 DEBUG_PRINT("intr enable bits 0x%x\n", devpriv->intr_enable_bits);
2338 }
2339
2340 static void enable_ai_interrupts(struct comedi_device *dev,
2341 const struct comedi_cmd *cmd)
2342 {
2343 struct pcidas64_private *devpriv = dev->private;
2344 uint32_t bits;
2345 unsigned long flags;
2346
2347 bits = EN_ADC_OVERRUN_BIT | EN_ADC_DONE_INTR_BIT |
2348 EN_ADC_ACTIVE_INTR_BIT | EN_ADC_STOP_INTR_BIT;
2349 /* Use pio transfer and interrupt on end of conversion if TRIG_WAKE_EOS flag is set. */
2350 if (cmd->flags & TRIG_WAKE_EOS) {
2351 /* 4020 doesn't support pio transfers except for fifo dregs */
2352 if (board(dev)->layout != LAYOUT_4020)
2353 bits |= ADC_INTR_EOSCAN_BITS | EN_ADC_INTR_SRC_BIT;
2354 }
2355 spin_lock_irqsave(&dev->spinlock, flags);
2356 devpriv->intr_enable_bits |= bits;
2357 writew(devpriv->intr_enable_bits,
2358 devpriv->main_iobase + INTR_ENABLE_REG);
2359 DEBUG_PRINT("intr enable bits 0x%x\n", devpriv->intr_enable_bits);
2360 spin_unlock_irqrestore(&dev->spinlock, flags);
2361 }
2362
2363 static uint32_t ai_convert_counter_6xxx(const struct comedi_device *dev,
2364 const struct comedi_cmd *cmd)
2365 {
2366 /* supposed to load counter with desired divisor minus 3 */
2367 return cmd->convert_arg / TIMER_BASE - 3;
2368 }
2369
2370 static uint32_t ai_scan_counter_6xxx(struct comedi_device *dev,
2371 struct comedi_cmd *cmd)
2372 {
2373 uint32_t count;
2374 /* figure out how long we need to delay at end of scan */
2375 switch (cmd->scan_begin_src) {
2376 case TRIG_TIMER:
2377 count = (cmd->scan_begin_arg -
2378 (cmd->convert_arg * (cmd->chanlist_len - 1)))
2379 / TIMER_BASE;
2380 break;
2381 case TRIG_FOLLOW:
2382 count = cmd->convert_arg / TIMER_BASE;
2383 break;
2384 default:
2385 return 0;
2386 break;
2387 }
2388 return count - 3;
2389 }
2390
2391 static uint32_t ai_convert_counter_4020(struct comedi_device *dev,
2392 struct comedi_cmd *cmd)
2393 {
2394 struct pcidas64_private *devpriv = dev->private;
2395 unsigned int divisor;
2396
2397 switch (cmd->scan_begin_src) {
2398 case TRIG_TIMER:
2399 divisor = cmd->scan_begin_arg / TIMER_BASE;
2400 break;
2401 case TRIG_OTHER:
2402 divisor = devpriv->ext_clock.divisor;
2403 break;
2404 default: /* should never happen */
2405 comedi_error(dev, "bug! failed to set ai pacing!");
2406 divisor = 1000;
2407 break;
2408 }
2409
2410 /* supposed to load counter with desired divisor minus 2 for 4020 */
2411 return divisor - 2;
2412 }
2413
2414 static void select_master_clock_4020(struct comedi_device *dev,
2415 const struct comedi_cmd *cmd)
2416 {
2417 struct pcidas64_private *devpriv = dev->private;
2418
2419 /* select internal/external master clock */
2420 devpriv->hw_config_bits &= ~MASTER_CLOCK_4020_MASK;
2421 if (cmd->scan_begin_src == TRIG_OTHER) {
2422 int chanspec = devpriv->ext_clock.chanspec;
2423
2424 if (CR_CHAN(chanspec))
2425 devpriv->hw_config_bits |= BNC_CLOCK_4020_BITS;
2426 else
2427 devpriv->hw_config_bits |= EXT_CLOCK_4020_BITS;
2428 } else {
2429 devpriv->hw_config_bits |= INTERNAL_CLOCK_4020_BITS;
2430 }
2431 writew(devpriv->hw_config_bits,
2432 devpriv->main_iobase + HW_CONFIG_REG);
2433 }
2434
2435 static void select_master_clock(struct comedi_device *dev,
2436 const struct comedi_cmd *cmd)
2437 {
2438 switch (board(dev)->layout) {
2439 case LAYOUT_4020:
2440 select_master_clock_4020(dev, cmd);
2441 break;
2442 default:
2443 break;
2444 }
2445 }
2446
2447 static inline void dma_start_sync(struct comedi_device *dev,
2448 unsigned int channel)
2449 {
2450 struct pcidas64_private *devpriv = dev->private;
2451 unsigned long flags;
2452
2453 /* spinlock for plx dma control/status reg */
2454 spin_lock_irqsave(&dev->spinlock, flags);
2455 if (channel)
2456 writeb(PLX_DMA_EN_BIT | PLX_DMA_START_BIT |
2457 PLX_CLEAR_DMA_INTR_BIT,
2458 devpriv->plx9080_iobase + PLX_DMA1_CS_REG);
2459 else
2460 writeb(PLX_DMA_EN_BIT | PLX_DMA_START_BIT |
2461 PLX_CLEAR_DMA_INTR_BIT,
2462 devpriv->plx9080_iobase + PLX_DMA0_CS_REG);
2463 spin_unlock_irqrestore(&dev->spinlock, flags);
2464 }
2465
2466 static void set_ai_pacing(struct comedi_device *dev, struct comedi_cmd *cmd)
2467 {
2468 struct pcidas64_private *devpriv = dev->private;
2469 uint32_t convert_counter = 0, scan_counter = 0;
2470
2471 check_adc_timing(dev, cmd);
2472
2473 select_master_clock(dev, cmd);
2474
2475 if (board(dev)->layout == LAYOUT_4020) {
2476 convert_counter = ai_convert_counter_4020(dev, cmd);
2477 } else {
2478 convert_counter = ai_convert_counter_6xxx(dev, cmd);
2479 scan_counter = ai_scan_counter_6xxx(dev, cmd);
2480 }
2481
2482 /* load lower 16 bits of convert interval */
2483 writew(convert_counter & 0xffff,
2484 devpriv->main_iobase + ADC_SAMPLE_INTERVAL_LOWER_REG);
2485 DEBUG_PRINT("convert counter 0x%x\n", convert_counter);
2486 /* load upper 8 bits of convert interval */
2487 writew((convert_counter >> 16) & 0xff,
2488 devpriv->main_iobase + ADC_SAMPLE_INTERVAL_UPPER_REG);
2489 /* load lower 16 bits of scan delay */
2490 writew(scan_counter & 0xffff,
2491 devpriv->main_iobase + ADC_DELAY_INTERVAL_LOWER_REG);
2492 /* load upper 8 bits of scan delay */
2493 writew((scan_counter >> 16) & 0xff,
2494 devpriv->main_iobase + ADC_DELAY_INTERVAL_UPPER_REG);
2495 DEBUG_PRINT("scan counter 0x%x\n", scan_counter);
2496 }
2497
2498 static int use_internal_queue_6xxx(const struct comedi_cmd *cmd)
2499 {
2500 int i;
2501 for (i = 0; i + 1 < cmd->chanlist_len; i++) {
2502 if (CR_CHAN(cmd->chanlist[i + 1]) !=
2503 CR_CHAN(cmd->chanlist[i]) + 1)
2504 return 0;
2505 if (CR_RANGE(cmd->chanlist[i + 1]) !=
2506 CR_RANGE(cmd->chanlist[i]))
2507 return 0;
2508 if (CR_AREF(cmd->chanlist[i + 1]) != CR_AREF(cmd->chanlist[i]))
2509 return 0;
2510 }
2511 return 1;
2512 }
2513
2514 static int setup_channel_queue(struct comedi_device *dev,
2515 const struct comedi_cmd *cmd)
2516 {
2517 struct pcidas64_private *devpriv = dev->private;
2518 unsigned short bits;
2519 int i;
2520
2521 if (board(dev)->layout != LAYOUT_4020) {
2522 if (use_internal_queue_6xxx(cmd)) {
2523 devpriv->hw_config_bits &= ~EXT_QUEUE_BIT;
2524 writew(devpriv->hw_config_bits,
2525 devpriv->main_iobase + HW_CONFIG_REG);
2526 bits = 0;
2527 /* set channel */
2528 bits |= adc_chan_bits(CR_CHAN(cmd->chanlist[0]));
2529 /* set gain */
2530 bits |= ai_range_bits_6xxx(dev,
2531 CR_RANGE(cmd->chanlist[0]));
2532 /* set single-ended / differential */
2533 bits |= se_diff_bit_6xxx(dev,
2534 CR_AREF(cmd->chanlist[0]) ==
2535 AREF_DIFF);
2536 if (CR_AREF(cmd->chanlist[0]) == AREF_COMMON)
2537 bits |= ADC_COMMON_BIT;
2538 /* set stop channel */
2539 writew(adc_chan_bits
2540 (CR_CHAN(cmd->chanlist[cmd->chanlist_len - 1])),
2541 devpriv->main_iobase + ADC_QUEUE_HIGH_REG);
2542 /* set start channel, and rest of settings */
2543 writew(bits,
2544 devpriv->main_iobase + ADC_QUEUE_LOAD_REG);
2545 } else {
2546 /* use external queue */
2547 if (dev->write_subdev && dev->write_subdev->busy) {
2548 warn_external_queue(dev);
2549 return -EBUSY;
2550 }
2551 devpriv->hw_config_bits |= EXT_QUEUE_BIT;
2552 writew(devpriv->hw_config_bits,
2553 devpriv->main_iobase + HW_CONFIG_REG);
2554 /* clear DAC buffer to prevent weird interactions */
2555 writew(0,
2556 devpriv->main_iobase + DAC_BUFFER_CLEAR_REG);
2557 /* clear queue pointer */
2558 writew(0, devpriv->main_iobase + ADC_QUEUE_CLEAR_REG);
2559 /* load external queue */
2560 for (i = 0; i < cmd->chanlist_len; i++) {
2561 bits = 0;
2562 /* set channel */
2563 bits |=
2564 adc_chan_bits(CR_CHAN(cmd->chanlist[i]));
2565 /* set gain */
2566 bits |= ai_range_bits_6xxx(dev,
2567 CR_RANGE(cmd->
2568 chanlist
2569 [i]));
2570 /* set single-ended / differential */
2571 bits |= se_diff_bit_6xxx(dev,
2572 CR_AREF(cmd->
2573 chanlist[i]) ==
2574 AREF_DIFF);
2575 if (CR_AREF(cmd->chanlist[i]) == AREF_COMMON)
2576 bits |= ADC_COMMON_BIT;
2577 /* mark end of queue */
2578 if (i == cmd->chanlist_len - 1)
2579 bits |= QUEUE_EOSCAN_BIT |
2580 QUEUE_EOSEQ_BIT;
2581 writew(bits,
2582 devpriv->main_iobase +
2583 ADC_QUEUE_FIFO_REG);
2584 DEBUG_PRINT
2585 ("wrote 0x%x to external channel queue\n",
2586 bits);
2587 }
2588 /* doing a queue clear is not specified in board docs,
2589 * but required for reliable operation */
2590 writew(0, devpriv->main_iobase + ADC_QUEUE_CLEAR_REG);
2591 /* prime queue holding register */
2592 writew(0, devpriv->main_iobase + ADC_QUEUE_LOAD_REG);
2593 }
2594 } else {
2595 unsigned short old_cal_range_bits =
2596 devpriv->i2c_cal_range_bits;
2597
2598 devpriv->i2c_cal_range_bits &= ~ADC_SRC_4020_MASK;
2599 /* select BNC inputs */
2600 devpriv->i2c_cal_range_bits |= adc_src_4020_bits(4);
2601 /* select ranges */
2602 for (i = 0; i < cmd->chanlist_len; i++) {
2603 unsigned int channel = CR_CHAN(cmd->chanlist[i]);
2604 unsigned int range = CR_RANGE(cmd->chanlist[i]);
2605
2606 if (range == 0)
2607 devpriv->i2c_cal_range_bits |=
2608 attenuate_bit(channel);
2609 else
2610 devpriv->i2c_cal_range_bits &=
2611 ~attenuate_bit(channel);
2612 }
2613 /* update calibration/range i2c register only if necessary, as it is very slow */
2614 if (old_cal_range_bits != devpriv->i2c_cal_range_bits) {
2615 uint8_t i2c_data = devpriv->i2c_cal_range_bits;
2616 i2c_write(dev, RANGE_CAL_I2C_ADDR, &i2c_data,
2617 sizeof(i2c_data));
2618 }
2619 }
2620 return 0;
2621 }
2622
2623 static inline void load_first_dma_descriptor(struct comedi_device *dev,
2624 unsigned int dma_channel,
2625 unsigned int descriptor_bits)
2626 {
2627 struct pcidas64_private *devpriv = dev->private;
2628
2629 /* The transfer size, pci address, and local address registers
2630 * are supposedly unused during chained dma,
2631 * but I have found that left over values from last operation
2632 * occasionally cause problems with transfer of first dma
2633 * block. Initializing them to zero seems to fix the problem. */
2634 if (dma_channel) {
2635 writel(0,
2636 devpriv->plx9080_iobase + PLX_DMA1_TRANSFER_SIZE_REG);
2637 writel(0, devpriv->plx9080_iobase + PLX_DMA1_PCI_ADDRESS_REG);
2638 writel(0,
2639 devpriv->plx9080_iobase + PLX_DMA1_LOCAL_ADDRESS_REG);
2640 writel(descriptor_bits,
2641 devpriv->plx9080_iobase + PLX_DMA1_DESCRIPTOR_REG);
2642 } else {
2643 writel(0,
2644 devpriv->plx9080_iobase + PLX_DMA0_TRANSFER_SIZE_REG);
2645 writel(0, devpriv->plx9080_iobase + PLX_DMA0_PCI_ADDRESS_REG);
2646 writel(0,
2647 devpriv->plx9080_iobase + PLX_DMA0_LOCAL_ADDRESS_REG);
2648 writel(descriptor_bits,
2649 devpriv->plx9080_iobase + PLX_DMA0_DESCRIPTOR_REG);
2650 }
2651 }
2652
2653 static int ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
2654 {
2655 struct pcidas64_private *devpriv = dev->private;
2656 struct comedi_async *async = s->async;
2657 struct comedi_cmd *cmd = &async->cmd;
2658 uint32_t bits;
2659 unsigned int i;
2660 unsigned long flags;
2661 int retval;
2662
2663 disable_ai_pacing(dev);
2664 abort_dma(dev, 1);
2665
2666 retval = setup_channel_queue(dev, cmd);
2667 if (retval < 0)
2668 return retval;
2669
2670 /* make sure internal calibration source is turned off */
2671 writew(0, devpriv->main_iobase + CALIBRATION_REG);
2672
2673 set_ai_pacing(dev, cmd);
2674
2675 setup_sample_counters(dev, cmd);
2676
2677 enable_ai_interrupts(dev, cmd);
2678
2679 spin_lock_irqsave(&dev->spinlock, flags);
2680 /* set mode, allow conversions through software gate */
2681 devpriv->adc_control1_bits |= ADC_SW_GATE_BIT;
2682 devpriv->adc_control1_bits &= ~ADC_DITHER_BIT;
2683 if (board(dev)->layout != LAYOUT_4020) {
2684 devpriv->adc_control1_bits &= ~ADC_MODE_MASK;
2685 if (cmd->convert_src == TRIG_EXT)
2686 devpriv->adc_control1_bits |= adc_mode_bits(13); /* good old mode 13 */
2687 else
2688 devpriv->adc_control1_bits |= adc_mode_bits(8); /* mode 8. What else could you need? */
2689 } else {
2690 devpriv->adc_control1_bits &= ~CHANNEL_MODE_4020_MASK;
2691 if (cmd->chanlist_len == 4)
2692 devpriv->adc_control1_bits |= FOUR_CHANNEL_4020_BITS;
2693 else if (cmd->chanlist_len == 2)
2694 devpriv->adc_control1_bits |= TWO_CHANNEL_4020_BITS;
2695 devpriv->adc_control1_bits &= ~ADC_LO_CHANNEL_4020_MASK;
2696 devpriv->adc_control1_bits |=
2697 adc_lo_chan_4020_bits(CR_CHAN(cmd->chanlist[0]));
2698 devpriv->adc_control1_bits &= ~ADC_HI_CHANNEL_4020_MASK;
2699 devpriv->adc_control1_bits |=
2700 adc_hi_chan_4020_bits(CR_CHAN
2701 (cmd->
2702 chanlist[cmd->chanlist_len - 1]));
2703 }
2704 writew(devpriv->adc_control1_bits,
2705 devpriv->main_iobase + ADC_CONTROL1_REG);
2706 DEBUG_PRINT("control1 bits 0x%x\n", devpriv->adc_control1_bits);
2707 spin_unlock_irqrestore(&dev->spinlock, flags);
2708
2709 /* clear adc buffer */
2710 writew(0, devpriv->main_iobase + ADC_BUFFER_CLEAR_REG);
2711
2712 if ((cmd->flags & TRIG_WAKE_EOS) == 0 ||
2713 board(dev)->layout == LAYOUT_4020) {
2714 devpriv->ai_dma_index = 0;
2715
2716 /* set dma transfer size */
2717 for (i = 0; i < ai_dma_ring_count(board(dev)); i++)
2718 devpriv->ai_dma_desc[i].transfer_size =
2719 cpu_to_le32(dma_transfer_size(dev) *
2720 sizeof(uint16_t));
2721
2722 /* give location of first dma descriptor */
2723 load_first_dma_descriptor(dev, 1,
2724 devpriv->ai_dma_desc_bus_addr |
2725 PLX_DESC_IN_PCI_BIT |
2726 PLX_INTR_TERM_COUNT |
2727 PLX_XFER_LOCAL_TO_PCI);
2728
2729 dma_start_sync(dev, 1);
2730 }
2731
2732 if (board(dev)->layout == LAYOUT_4020) {
2733 /* set source for external triggers */
2734 bits = 0;
2735 if (cmd->start_src == TRIG_EXT && CR_CHAN(cmd->start_arg))
2736 bits |= EXT_START_TRIG_BNC_BIT;
2737 if (cmd->stop_src == TRIG_EXT && CR_CHAN(cmd->stop_arg))
2738 bits |= EXT_STOP_TRIG_BNC_BIT;
2739 writew(bits, devpriv->main_iobase + DAQ_ATRIG_LOW_4020_REG);
2740 }
2741
2742 spin_lock_irqsave(&dev->spinlock, flags);
2743
2744 /* enable pacing, triggering, etc */
2745 bits = ADC_ENABLE_BIT | ADC_SOFT_GATE_BITS | ADC_GATE_LEVEL_BIT;
2746 if (cmd->flags & TRIG_WAKE_EOS)
2747 bits |= ADC_DMA_DISABLE_BIT;
2748 /* set start trigger */
2749 if (cmd->start_src == TRIG_EXT) {
2750 bits |= ADC_START_TRIG_EXT_BITS;
2751 if (cmd->start_arg & CR_INVERT)
2752 bits |= ADC_START_TRIG_FALLING_BIT;
2753 } else if (cmd->start_src == TRIG_NOW)
2754 bits |= ADC_START_TRIG_SOFT_BITS;
2755 if (use_hw_sample_counter(cmd))
2756 bits |= ADC_SAMPLE_COUNTER_EN_BIT;
2757 writew(bits, devpriv->main_iobase + ADC_CONTROL0_REG);
2758 DEBUG_PRINT("control0 bits 0x%x\n", bits);
2759
2760 devpriv->ai_cmd_running = 1;
2761
2762 spin_unlock_irqrestore(&dev->spinlock, flags);
2763
2764 /* start acquisition */
2765 if (cmd->start_src == TRIG_NOW) {
2766 writew(0, devpriv->main_iobase + ADC_START_REG);
2767 DEBUG_PRINT("soft trig\n");
2768 }
2769
2770 return 0;
2771 }
2772
2773 /* read num_samples from 16 bit wide ai fifo */
2774 static void pio_drain_ai_fifo_16(struct comedi_device *dev)
2775 {
2776 struct pcidas64_private *devpriv = dev->private;
2777 struct comedi_subdevice *s = dev->read_subdev;
2778 struct comedi_async *async = s->async;
2779 struct comedi_cmd *cmd = &async->cmd;
2780 unsigned int i;
2781 uint16_t prepost_bits;
2782 int read_segment, read_index, write_segment, write_index;
2783 int num_samples;
2784
2785 do {
2786 /* get least significant 15 bits */
2787 read_index =
2788 readw(devpriv->main_iobase + ADC_READ_PNTR_REG) & 0x7fff;
2789 write_index =
2790 readw(devpriv->main_iobase + ADC_WRITE_PNTR_REG) & 0x7fff;
2791 /* Get most significant bits (grey code). Different boards use different code
2792 * so use a scheme that doesn't depend on encoding. This read must
2793 * occur after reading least significant 15 bits to avoid race
2794 * with fifo switching to next segment. */
2795 prepost_bits = readw(devpriv->main_iobase + PREPOST_REG);
2796
2797 /* if read and write pointers are not on the same fifo segment, read to the
2798 * end of the read segment */
2799 read_segment = adc_upper_read_ptr_code(prepost_bits);
2800 write_segment = adc_upper_write_ptr_code(prepost_bits);
2801
2802 DEBUG_PRINT(" rd seg %i, wrt seg %i, rd idx %i, wrt idx %i\n",
2803 read_segment, write_segment, read_index,
2804 write_index);
2805
2806 if (read_segment != write_segment)
2807 num_samples =
2808 devpriv->ai_fifo_segment_length - read_index;
2809 else
2810 num_samples = write_index - read_index;
2811
2812 if (cmd->stop_src == TRIG_COUNT) {
2813 if (devpriv->ai_count == 0)
2814 break;
2815 if (num_samples > devpriv->ai_count)
2816 num_samples = devpriv->ai_count;
2817
2818 devpriv->ai_count -= num_samples;
2819 }
2820
2821 if (num_samples < 0) {
2822 dev_err(dev->class_dev,
2823 "cb_pcidas64: bug! num_samples < 0\n");
2824 break;
2825 }
2826
2827 DEBUG_PRINT(" read %i samples from fifo\n", num_samples);
2828
2829 for (i = 0; i < num_samples; i++) {
2830 cfc_write_to_buffer(s,
2831 readw(devpriv->main_iobase +
2832 ADC_FIFO_REG));
2833 }
2834
2835 } while (read_segment != write_segment);
2836 }
2837
2838 /* Read from 32 bit wide ai fifo of 4020 - deal with insane grey coding of pointers.
2839 * The pci-4020 hardware only supports
2840 * dma transfers (it only supports the use of pio for draining the last remaining
2841 * points from the fifo when a data acquisition operation has completed).
2842 */
2843 static void pio_drain_ai_fifo_32(struct comedi_device *dev)
2844 {
2845 struct pcidas64_private *devpriv = dev->private;
2846 struct comedi_subdevice *s = dev->read_subdev;
2847 struct comedi_async *async = s->async;
2848 struct comedi_cmd *cmd = &async->cmd;
2849 unsigned int i;
2850 unsigned int max_transfer = 100000;
2851 uint32_t fifo_data;
2852 int write_code =
2853 readw(devpriv->main_iobase + ADC_WRITE_PNTR_REG) & 0x7fff;
2854 int read_code =
2855 readw(devpriv->main_iobase + ADC_READ_PNTR_REG) & 0x7fff;
2856
2857 if (cmd->stop_src == TRIG_COUNT) {
2858 if (max_transfer > devpriv->ai_count)
2859 max_transfer = devpriv->ai_count;
2860
2861 }
2862 for (i = 0; read_code != write_code && i < max_transfer;) {
2863 fifo_data = readl(devpriv->dio_counter_iobase + ADC_FIFO_REG);
2864 cfc_write_to_buffer(s, fifo_data & 0xffff);
2865 i++;
2866 if (i < max_transfer) {
2867 cfc_write_to_buffer(s, (fifo_data >> 16) & 0xffff);
2868 i++;
2869 }
2870 read_code =
2871 readw(devpriv->main_iobase + ADC_READ_PNTR_REG) & 0x7fff;
2872 }
2873 devpriv->ai_count -= i;
2874 }
2875
2876 /* empty fifo */
2877 static void pio_drain_ai_fifo(struct comedi_device *dev)
2878 {
2879 if (board(dev)->layout == LAYOUT_4020)
2880 pio_drain_ai_fifo_32(dev);
2881 else
2882 pio_drain_ai_fifo_16(dev);
2883 }
2884
2885 static void drain_dma_buffers(struct comedi_device *dev, unsigned int channel)
2886 {
2887 struct pcidas64_private *devpriv = dev->private;
2888 struct comedi_async *async = dev->read_subdev->async;
2889 uint32_t next_transfer_addr;
2890 int j;
2891 int num_samples = 0;
2892 void __iomem *pci_addr_reg;
2893
2894 if (channel)
2895 pci_addr_reg =
2896 devpriv->plx9080_iobase + PLX_DMA1_PCI_ADDRESS_REG;
2897 else
2898 pci_addr_reg =
2899 devpriv->plx9080_iobase + PLX_DMA0_PCI_ADDRESS_REG;
2900
2901 /* loop until we have read all the full buffers */
2902 for (j = 0, next_transfer_addr = readl(pci_addr_reg);
2903 (next_transfer_addr <
2904 devpriv->ai_buffer_bus_addr[devpriv->ai_dma_index]
2905 || next_transfer_addr >=
2906 devpriv->ai_buffer_bus_addr[devpriv->ai_dma_index] +
2907 DMA_BUFFER_SIZE) && j < ai_dma_ring_count(board(dev)); j++) {
2908 /* transfer data from dma buffer to comedi buffer */
2909 num_samples = dma_transfer_size(dev);
2910 if (async->cmd.stop_src == TRIG_COUNT) {
2911 if (num_samples > devpriv->ai_count)
2912 num_samples = devpriv->ai_count;
2913 devpriv->ai_count -= num_samples;
2914 }
2915 cfc_write_array_to_buffer(dev->read_subdev,
2916 devpriv->ai_buffer[devpriv->
2917 ai_dma_index],
2918 num_samples * sizeof(uint16_t));
2919 devpriv->ai_dma_index =
2920 (devpriv->ai_dma_index +
2921 1) % ai_dma_ring_count(board(dev));
2922
2923 DEBUG_PRINT("next buffer addr 0x%lx\n",
2924 (unsigned long)devpriv->
2925 ai_buffer_bus_addr[devpriv->ai_dma_index]);
2926 DEBUG_PRINT("pci addr reg 0x%x\n", next_transfer_addr);
2927 }
2928 /* XXX check for dma ring buffer overrun (use end-of-chain bit to mark last
2929 * unused buffer) */
2930 }
2931
2932 static void handle_ai_interrupt(struct comedi_device *dev,
2933 unsigned short status,
2934 unsigned int plx_status)
2935 {
2936 struct pcidas64_private *devpriv = dev->private;
2937 struct comedi_subdevice *s = dev->read_subdev;
2938 struct comedi_async *async = s->async;
2939 struct comedi_cmd *cmd = &async->cmd;
2940 uint8_t dma1_status;
2941 unsigned long flags;
2942
2943 /* check for fifo overrun */
2944 if (status & ADC_OVERRUN_BIT) {
2945 comedi_error(dev, "fifo overrun");
2946 async->events |= COMEDI_CB_EOA | COMEDI_CB_ERROR;
2947 }
2948 /* spin lock makes sure no one else changes plx dma control reg */
2949 spin_lock_irqsave(&dev->spinlock, flags);
2950 dma1_status = readb(devpriv->plx9080_iobase + PLX_DMA1_CS_REG);
2951 if (plx_status & ICS_DMA1_A) { /* dma chan 1 interrupt */
2952 writeb((dma1_status & PLX_DMA_EN_BIT) | PLX_CLEAR_DMA_INTR_BIT,
2953 devpriv->plx9080_iobase + PLX_DMA1_CS_REG);
2954 DEBUG_PRINT("dma1 status 0x%x\n", dma1_status);
2955
2956 if (dma1_status & PLX_DMA_EN_BIT)
2957 drain_dma_buffers(dev, 1);
2958
2959 DEBUG_PRINT(" cleared dma ch1 interrupt\n");
2960 }
2961 spin_unlock_irqrestore(&dev->spinlock, flags);
2962
2963 if (status & ADC_DONE_BIT)
2964 DEBUG_PRINT("adc done interrupt\n");
2965
2966 /* drain fifo with pio */
2967 if ((status & ADC_DONE_BIT) ||
2968 ((cmd->flags & TRIG_WAKE_EOS) &&
2969 (status & ADC_INTR_PENDING_BIT) &&
2970 (board(dev)->layout != LAYOUT_4020))) {
2971 DEBUG_PRINT("pio fifo drain\n");
2972 spin_lock_irqsave(&dev->spinlock, flags);
2973 if (devpriv->ai_cmd_running) {
2974 spin_unlock_irqrestore(&dev->spinlock, flags);
2975 pio_drain_ai_fifo(dev);
2976 } else
2977 spin_unlock_irqrestore(&dev->spinlock, flags);
2978 }
2979 /* if we are have all the data, then quit */
2980 if ((cmd->stop_src == TRIG_COUNT && (int)devpriv->ai_count <= 0) ||
2981 (cmd->stop_src == TRIG_EXT && (status & ADC_STOP_BIT))) {
2982 async->events |= COMEDI_CB_EOA;
2983 }
2984
2985 cfc_handle_events(dev, s);
2986 }
2987
2988 static inline unsigned int prev_ao_dma_index(struct comedi_device *dev)
2989 {
2990 struct pcidas64_private *devpriv = dev->private;
2991 unsigned int buffer_index;
2992
2993 if (devpriv->ao_dma_index == 0)
2994 buffer_index = AO_DMA_RING_COUNT - 1;
2995 else
2996 buffer_index = devpriv->ao_dma_index - 1;
2997 return buffer_index;
2998 }
2999
3000 static int last_ao_dma_load_completed(struct comedi_device *dev)
3001 {
3002 struct pcidas64_private *devpriv = dev->private;
3003 unsigned int buffer_index;
3004 unsigned int transfer_address;
3005 unsigned short dma_status;
3006
3007 buffer_index = prev_ao_dma_index(dev);
3008 dma_status = readb(devpriv->plx9080_iobase + PLX_DMA0_CS_REG);
3009 if ((dma_status & PLX_DMA_DONE_BIT) == 0)
3010 return 0;
3011
3012 transfer_address =
3013 readl(devpriv->plx9080_iobase + PLX_DMA0_PCI_ADDRESS_REG);
3014 if (transfer_address != devpriv->ao_buffer_bus_addr[buffer_index])
3015 return 0;
3016
3017 return 1;
3018 }
3019
3020 static int ao_stopped_by_error(struct comedi_device *dev,
3021 const struct comedi_cmd *cmd)
3022 {
3023 struct pcidas64_private *devpriv = dev->private;
3024
3025 if (cmd->stop_src == TRIG_NONE)
3026 return 1;
3027 if (cmd->stop_src == TRIG_COUNT) {
3028 if (devpriv->ao_count)
3029 return 1;
3030 if (last_ao_dma_load_completed(dev) == 0)
3031 return 1;
3032 }
3033 return 0;
3034 }
3035
3036 static inline int ao_dma_needs_restart(struct comedi_device *dev,
3037 unsigned short dma_status)
3038 {
3039 if ((dma_status & PLX_DMA_DONE_BIT) == 0 ||
3040 (dma_status & PLX_DMA_EN_BIT) == 0)
3041 return 0;
3042 if (last_ao_dma_load_completed(dev))
3043 return 0;
3044
3045 return 1;
3046 }
3047
3048 static void restart_ao_dma(struct comedi_device *dev)
3049 {
3050 struct pcidas64_private *devpriv = dev->private;
3051 unsigned int dma_desc_bits;
3052
3053 dma_desc_bits =
3054 readl(devpriv->plx9080_iobase + PLX_DMA0_DESCRIPTOR_REG);
3055 dma_desc_bits &= ~PLX_END_OF_CHAIN_BIT;
3056 DEBUG_PRINT("restarting ao dma, descriptor reg 0x%x\n", dma_desc_bits);
3057 load_first_dma_descriptor(dev, 0, dma_desc_bits);
3058
3059 dma_start_sync(dev, 0);
3060 }
3061
3062 static void handle_ao_interrupt(struct comedi_device *dev,
3063 unsigned short status, unsigned int plx_status)
3064 {
3065 struct pcidas64_private *devpriv = dev->private;
3066 struct comedi_subdevice *s = dev->write_subdev;
3067 struct comedi_async *async;
3068 struct comedi_cmd *cmd;
3069 uint8_t dma0_status;
3070 unsigned long flags;
3071
3072 /* board might not support ao, in which case write_subdev is NULL */
3073 if (s == NULL)
3074 return;
3075 async = s->async;
3076 cmd = &async->cmd;
3077
3078 /* spin lock makes sure no one else changes plx dma control reg */
3079 spin_lock_irqsave(&dev->spinlock, flags);
3080 dma0_status = readb(devpriv->plx9080_iobase + PLX_DMA0_CS_REG);
3081 if (plx_status & ICS_DMA0_A) { /* dma chan 0 interrupt */
3082 if ((dma0_status & PLX_DMA_EN_BIT)
3083 && !(dma0_status & PLX_DMA_DONE_BIT))
3084 writeb(PLX_DMA_EN_BIT | PLX_CLEAR_DMA_INTR_BIT,
3085 devpriv->plx9080_iobase + PLX_DMA0_CS_REG);
3086 else
3087 writeb(PLX_CLEAR_DMA_INTR_BIT,
3088 devpriv->plx9080_iobase + PLX_DMA0_CS_REG);
3089 spin_unlock_irqrestore(&dev->spinlock, flags);
3090 DEBUG_PRINT("dma0 status 0x%x\n", dma0_status);
3091 if (dma0_status & PLX_DMA_EN_BIT) {
3092 load_ao_dma(dev, cmd);
3093 /* try to recover from dma end-of-chain event */
3094 if (ao_dma_needs_restart(dev, dma0_status))
3095 restart_ao_dma(dev);
3096 }
3097 DEBUG_PRINT(" cleared dma ch0 interrupt\n");
3098 } else
3099 spin_unlock_irqrestore(&dev->spinlock, flags);
3100
3101 if ((status & DAC_DONE_BIT)) {
3102 async->events |= COMEDI_CB_EOA;
3103 if (ao_stopped_by_error(dev, cmd))
3104 async->events |= COMEDI_CB_ERROR;
3105 DEBUG_PRINT("plx dma0 desc reg 0x%x\n",
3106 readl(devpriv->plx9080_iobase +
3107 PLX_DMA0_DESCRIPTOR_REG));
3108 DEBUG_PRINT("plx dma0 address reg 0x%x\n",
3109 readl(devpriv->plx9080_iobase +
3110 PLX_DMA0_PCI_ADDRESS_REG));
3111 }
3112 cfc_handle_events(dev, s);
3113 }
3114
3115 static irqreturn_t handle_interrupt(int irq, void *d)
3116 {
3117 struct comedi_device *dev = d;
3118 struct pcidas64_private *devpriv = dev->private;
3119 unsigned short status;
3120 uint32_t plx_status;
3121 uint32_t plx_bits;
3122
3123 plx_status = readl(devpriv->plx9080_iobase + PLX_INTRCS_REG);
3124 status = readw(devpriv->main_iobase + HW_STATUS_REG);
3125
3126 DEBUG_PRINT("cb_pcidas64: hw status 0x%x ", status);
3127 DEBUG_PRINT("plx status 0x%x\n", plx_status);
3128
3129 /* an interrupt before all the postconfig stuff gets done could
3130 * cause a NULL dereference if we continue through the
3131 * interrupt handler */
3132 if (dev->attached == 0) {
3133 DEBUG_PRINT("cb_pcidas64: premature interrupt, ignoring",
3134 status);
3135 return IRQ_HANDLED;
3136 }
3137 handle_ai_interrupt(dev, status, plx_status);
3138 handle_ao_interrupt(dev, status, plx_status);
3139
3140 /* clear possible plx9080 interrupt sources */
3141 if (plx_status & ICS_LDIA) { /* clear local doorbell interrupt */
3142 plx_bits = readl(devpriv->plx9080_iobase + PLX_DBR_OUT_REG);
3143 writel(plx_bits, devpriv->plx9080_iobase + PLX_DBR_OUT_REG);
3144 DEBUG_PRINT(" cleared local doorbell bits 0x%x\n", plx_bits);
3145 }
3146
3147 DEBUG_PRINT("exiting handler\n");
3148
3149 return IRQ_HANDLED;
3150 }
3151
3152 static void abort_dma(struct comedi_device *dev, unsigned int channel)
3153 {
3154 struct pcidas64_private *devpriv = dev->private;
3155 unsigned long flags;
3156
3157 /* spinlock for plx dma control/status reg */
3158 spin_lock_irqsave(&dev->spinlock, flags);
3159
3160 plx9080_abort_dma(devpriv->plx9080_iobase, channel);
3161
3162 spin_unlock_irqrestore(&dev->spinlock, flags);
3163 }
3164
3165 static int ai_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
3166 {
3167 struct pcidas64_private *devpriv = dev->private;
3168 unsigned long flags;
3169
3170 spin_lock_irqsave(&dev->spinlock, flags);
3171 if (devpriv->ai_cmd_running == 0) {
3172 spin_unlock_irqrestore(&dev->spinlock, flags);
3173 return 0;
3174 }
3175 devpriv->ai_cmd_running = 0;
3176 spin_unlock_irqrestore(&dev->spinlock, flags);
3177
3178 disable_ai_pacing(dev);
3179
3180 abort_dma(dev, 1);
3181
3182 DEBUG_PRINT("ai canceled\n");
3183 return 0;
3184 }
3185
3186 static int ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
3187 struct comedi_insn *insn, unsigned int *data)
3188 {
3189 struct pcidas64_private *devpriv = dev->private;
3190 int chan = CR_CHAN(insn->chanspec);
3191 int range = CR_RANGE(insn->chanspec);
3192
3193 /* do some initializing */
3194 writew(0, devpriv->main_iobase + DAC_CONTROL0_REG);
3195
3196 /* set range */
3197 set_dac_range_bits(dev, &devpriv->dac_control1_bits, chan, range);
3198 writew(devpriv->dac_control1_bits,
3199 devpriv->main_iobase + DAC_CONTROL1_REG);
3200
3201 /* write to channel */
3202 if (board(dev)->layout == LAYOUT_4020) {
3203 writew(data[0] & 0xff,
3204 devpriv->main_iobase + dac_lsb_4020_reg(chan));
3205 writew((data[0] >> 8) & 0xf,
3206 devpriv->main_iobase + dac_msb_4020_reg(chan));
3207 } else {
3208 writew(data[0], devpriv->main_iobase + dac_convert_reg(chan));
3209 }
3210
3211 /* remember output value */
3212 devpriv->ao_value[chan] = data[0];
3213
3214 return 1;
3215 }
3216
3217 static int ao_readback_insn(struct comedi_device *dev,
3218 struct comedi_subdevice *s,
3219 struct comedi_insn *insn, unsigned int *data)
3220 {
3221 struct pcidas64_private *devpriv = dev->private;
3222
3223 data[0] = devpriv->ao_value[CR_CHAN(insn->chanspec)];
3224
3225 return 1;
3226 }
3227
3228 static void set_dac_control0_reg(struct comedi_device *dev,
3229 const struct comedi_cmd *cmd)
3230 {
3231 struct pcidas64_private *devpriv = dev->private;
3232 unsigned int bits = DAC_ENABLE_BIT | WAVEFORM_GATE_LEVEL_BIT |
3233 WAVEFORM_GATE_ENABLE_BIT | WAVEFORM_GATE_SELECT_BIT;
3234
3235 if (cmd->start_src == TRIG_EXT) {
3236 bits |= WAVEFORM_TRIG_EXT_BITS;
3237 if (cmd->start_arg & CR_INVERT)
3238 bits |= WAVEFORM_TRIG_FALLING_BIT;
3239 } else {
3240 bits |= WAVEFORM_TRIG_SOFT_BITS;
3241 }
3242 if (cmd->scan_begin_src == TRIG_EXT) {
3243 bits |= DAC_EXT_UPDATE_ENABLE_BIT;
3244 if (cmd->scan_begin_arg & CR_INVERT)
3245 bits |= DAC_EXT_UPDATE_FALLING_BIT;
3246 }
3247 writew(bits, devpriv->main_iobase + DAC_CONTROL0_REG);
3248 }
3249
3250 static void set_dac_control1_reg(struct comedi_device *dev,
3251 const struct comedi_cmd *cmd)
3252 {
3253 struct pcidas64_private *devpriv = dev->private;
3254 int i;
3255
3256 for (i = 0; i < cmd->chanlist_len; i++) {
3257 int channel, range;
3258
3259 channel = CR_CHAN(cmd->chanlist[i]);
3260 range = CR_RANGE(cmd->chanlist[i]);
3261 set_dac_range_bits(dev, &devpriv->dac_control1_bits, channel,
3262 range);
3263 }
3264 devpriv->dac_control1_bits |= DAC_SW_GATE_BIT;
3265 writew(devpriv->dac_control1_bits,
3266 devpriv->main_iobase + DAC_CONTROL1_REG);
3267 }
3268
3269 static void set_dac_select_reg(struct comedi_device *dev,
3270 const struct comedi_cmd *cmd)
3271 {
3272 struct pcidas64_private *devpriv = dev->private;
3273 uint16_t bits;
3274 unsigned int first_channel, last_channel;
3275
3276 first_channel = CR_CHAN(cmd->chanlist[0]);
3277 last_channel = CR_CHAN(cmd->chanlist[cmd->chanlist_len - 1]);
3278 if (last_channel < first_channel)
3279 comedi_error(dev, "bug! last ao channel < first ao channel");
3280
3281 bits = (first_channel & 0x7) | (last_channel & 0x7) << 3;
3282
3283 writew(bits, devpriv->main_iobase + DAC_SELECT_REG);
3284 }
3285
3286 static void set_dac_interval_regs(struct comedi_device *dev,
3287 const struct comedi_cmd *cmd)
3288 {
3289 struct pcidas64_private *devpriv = dev->private;
3290 unsigned int divisor;
3291
3292 if (cmd->scan_begin_src != TRIG_TIMER)
3293 return;
3294
3295 divisor = get_ao_divisor(cmd->scan_begin_arg, cmd->flags);
3296 if (divisor > max_counter_value) {
3297 comedi_error(dev, "bug! ao divisor too big");
3298 divisor = max_counter_value;
3299 }
3300 writew(divisor & 0xffff,
3301 devpriv->main_iobase + DAC_SAMPLE_INTERVAL_LOWER_REG);
3302 writew((divisor >> 16) & 0xff,
3303 devpriv->main_iobase + DAC_SAMPLE_INTERVAL_UPPER_REG);
3304 }
3305
3306 static unsigned int load_ao_dma_buffer(struct comedi_device *dev,
3307 const struct comedi_cmd *cmd)
3308 {
3309 struct pcidas64_private *devpriv = dev->private;
3310 unsigned int num_bytes, buffer_index, prev_buffer_index;
3311 unsigned int next_bits;
3312
3313 buffer_index = devpriv->ao_dma_index;
3314 prev_buffer_index = prev_ao_dma_index(dev);
3315
3316 DEBUG_PRINT("attempting to load ao buffer %i (0x%x)\n", buffer_index,
3317 devpriv->ao_buffer_bus_addr[buffer_index]);
3318
3319 num_bytes = comedi_buf_read_n_available(dev->write_subdev->async);
3320 if (num_bytes > DMA_BUFFER_SIZE)
3321 num_bytes = DMA_BUFFER_SIZE;
3322 if (cmd->stop_src == TRIG_COUNT && num_bytes > devpriv->ao_count)
3323 num_bytes = devpriv->ao_count;
3324 num_bytes -= num_bytes % bytes_in_sample;
3325
3326 if (num_bytes == 0)
3327 return 0;
3328
3329 DEBUG_PRINT("loading %i bytes\n", num_bytes);
3330
3331 num_bytes = cfc_read_array_from_buffer(dev->write_subdev,
3332 devpriv->
3333 ao_buffer[buffer_index],
3334 num_bytes);
3335 devpriv->ao_dma_desc[buffer_index].transfer_size =
3336 cpu_to_le32(num_bytes);
3337 /* set end of chain bit so we catch underruns */
3338 next_bits = le32_to_cpu(devpriv->ao_dma_desc[buffer_index].next);
3339 next_bits |= PLX_END_OF_CHAIN_BIT;
3340 devpriv->ao_dma_desc[buffer_index].next = cpu_to_le32(next_bits);
3341 /* clear end of chain bit on previous buffer now that we have set it
3342 * for the last buffer */
3343 next_bits = le32_to_cpu(devpriv->ao_dma_desc[prev_buffer_index].next);
3344 next_bits &= ~PLX_END_OF_CHAIN_BIT;
3345 devpriv->ao_dma_desc[prev_buffer_index].next = cpu_to_le32(next_bits);
3346
3347 devpriv->ao_dma_index = (buffer_index + 1) % AO_DMA_RING_COUNT;
3348 devpriv->ao_count -= num_bytes;
3349
3350 return num_bytes;
3351 }
3352
3353 static void load_ao_dma(struct comedi_device *dev, const struct comedi_cmd *cmd)
3354 {
3355 struct pcidas64_private *devpriv = dev->private;
3356 unsigned int num_bytes;
3357 unsigned int next_transfer_addr;
3358 void __iomem *pci_addr_reg =
3359 devpriv->plx9080_iobase + PLX_DMA0_PCI_ADDRESS_REG;
3360 unsigned int buffer_index;
3361
3362 do {
3363 buffer_index = devpriv->ao_dma_index;
3364 /* don't overwrite data that hasn't been transferred yet */
3365 next_transfer_addr = readl(pci_addr_reg);
3366 if (next_transfer_addr >=
3367 devpriv->ao_buffer_bus_addr[buffer_index]
3368 && next_transfer_addr <
3369 devpriv->ao_buffer_bus_addr[buffer_index] +
3370 DMA_BUFFER_SIZE)
3371 return;
3372 num_bytes = load_ao_dma_buffer(dev, cmd);
3373 } while (num_bytes >= DMA_BUFFER_SIZE);
3374 }
3375
3376 static int prep_ao_dma(struct comedi_device *dev, const struct comedi_cmd *cmd)
3377 {
3378 struct pcidas64_private *devpriv = dev->private;
3379 unsigned int num_bytes;
3380 int i;
3381
3382 /* clear queue pointer too, since external queue has
3383 * weird interactions with ao fifo */
3384 writew(0, devpriv->main_iobase + ADC_QUEUE_CLEAR_REG);
3385 writew(0, devpriv->main_iobase + DAC_BUFFER_CLEAR_REG);
3386
3387 num_bytes = (DAC_FIFO_SIZE / 2) * bytes_in_sample;
3388 if (cmd->stop_src == TRIG_COUNT &&
3389 num_bytes / bytes_in_sample > devpriv->ao_count)
3390 num_bytes = devpriv->ao_count * bytes_in_sample;
3391 num_bytes = cfc_read_array_from_buffer(dev->write_subdev,
3392 devpriv->ao_bounce_buffer,
3393 num_bytes);
3394 for (i = 0; i < num_bytes / bytes_in_sample; i++) {
3395 writew(devpriv->ao_bounce_buffer[i],
3396 devpriv->main_iobase + DAC_FIFO_REG);
3397 }
3398 devpriv->ao_count -= num_bytes / bytes_in_sample;
3399 if (cmd->stop_src == TRIG_COUNT && devpriv->ao_count == 0)
3400 return 0;
3401 num_bytes = load_ao_dma_buffer(dev, cmd);
3402 if (num_bytes == 0)
3403 return -1;
3404 if (num_bytes >= DMA_BUFFER_SIZE) ;
3405 load_ao_dma(dev, cmd);
3406
3407 dma_start_sync(dev, 0);
3408
3409 return 0;
3410 }
3411
3412 static inline int external_ai_queue_in_use(struct comedi_device *dev)
3413 {
3414 if (dev->read_subdev->busy)
3415 return 0;
3416 if (board(dev)->layout == LAYOUT_4020)
3417 return 0;
3418 else if (use_internal_queue_6xxx(&dev->read_subdev->async->cmd))
3419 return 0;
3420 return 1;
3421 }
3422
3423 static int ao_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
3424 {
3425 struct pcidas64_private *devpriv = dev->private;
3426 struct comedi_cmd *cmd = &s->async->cmd;
3427
3428 if (external_ai_queue_in_use(dev)) {
3429 warn_external_queue(dev);
3430 return -EBUSY;
3431 }
3432 /* disable analog output system during setup */
3433 writew(0x0, devpriv->main_iobase + DAC_CONTROL0_REG);
3434
3435 devpriv->ao_dma_index = 0;
3436 devpriv->ao_count = cmd->stop_arg * cmd->chanlist_len;
3437
3438 set_dac_select_reg(dev, cmd);
3439 set_dac_interval_regs(dev, cmd);
3440 load_first_dma_descriptor(dev, 0, devpriv->ao_dma_desc_bus_addr |
3441 PLX_DESC_IN_PCI_BIT | PLX_INTR_TERM_COUNT);
3442
3443 set_dac_control1_reg(dev, cmd);
3444 s->async->inttrig = ao_inttrig;
3445
3446 return 0;
3447 }
3448
3449 static int ao_inttrig(struct comedi_device *dev, struct comedi_subdevice *s,
3450 unsigned int trig_num)
3451 {
3452 struct pcidas64_private *devpriv = dev->private;
3453 struct comedi_cmd *cmd = &s->async->cmd;
3454 int retval;
3455
3456 if (trig_num != 0)
3457 return -EINVAL;
3458
3459 retval = prep_ao_dma(dev, cmd);
3460 if (retval < 0)
3461 return -EPIPE;
3462
3463 set_dac_control0_reg(dev, cmd);
3464
3465 if (cmd->start_src == TRIG_INT)
3466 writew(0, devpriv->main_iobase + DAC_START_REG);
3467
3468 s->async->inttrig = NULL;
3469
3470 return 0;
3471 }
3472
3473 static int ao_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s,
3474 struct comedi_cmd *cmd)
3475 {
3476 int err = 0;
3477 unsigned int tmp_arg;
3478 int i;
3479
3480 /* Step 1 : check if triggers are trivially valid */
3481
3482 err |= cfc_check_trigger_src(&cmd->start_src, TRIG_INT | TRIG_EXT);
3483 err |= cfc_check_trigger_src(&cmd->scan_begin_src,
3484 TRIG_TIMER | TRIG_EXT);
3485 err |= cfc_check_trigger_src(&cmd->convert_src, TRIG_NOW);
3486 err |= cfc_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
3487 err |= cfc_check_trigger_src(&cmd->stop_src, TRIG_NONE);
3488
3489 if (err)
3490 return 1;
3491
3492 /* Step 2a : make sure trigger sources are unique */
3493
3494 err |= cfc_check_trigger_is_unique(cmd->start_src);
3495 err |= cfc_check_trigger_is_unique(cmd->scan_begin_src);
3496
3497 /* Step 2b : and mutually compatible */
3498
3499 if (cmd->convert_src == TRIG_EXT && cmd->scan_begin_src == TRIG_TIMER)
3500 err |= -EINVAL;
3501 if (cmd->stop_src != TRIG_COUNT &&
3502 cmd->stop_src != TRIG_NONE && cmd->stop_src != TRIG_EXT)
3503 err |= -EINVAL;
3504
3505 if (err)
3506 return 2;
3507
3508 /* step 3: make sure arguments are trivially compatible */
3509
3510 if (cmd->scan_begin_src == TRIG_TIMER) {
3511 if (cmd->scan_begin_arg < board(dev)->ao_scan_speed) {
3512 cmd->scan_begin_arg = board(dev)->ao_scan_speed;
3513 err++;
3514 }
3515 if (get_ao_divisor(cmd->scan_begin_arg,
3516 cmd->flags) > max_counter_value) {
3517 cmd->scan_begin_arg =
3518 (max_counter_value + 2) * TIMER_BASE;
3519 err++;
3520 }
3521 }
3522
3523 if (!cmd->chanlist_len) {
3524 cmd->chanlist_len = 1;
3525 err++;
3526 }
3527 if (cmd->scan_end_arg != cmd->chanlist_len) {
3528 cmd->scan_end_arg = cmd->chanlist_len;
3529 err++;
3530 }
3531
3532 if (err)
3533 return 3;
3534
3535 /* step 4: fix up any arguments */
3536
3537 if (cmd->scan_begin_src == TRIG_TIMER) {
3538 tmp_arg = cmd->scan_begin_arg;
3539 cmd->scan_begin_arg =
3540 get_divisor(cmd->scan_begin_arg, cmd->flags) * TIMER_BASE;
3541 if (tmp_arg != cmd->scan_begin_arg)
3542 err++;
3543 }
3544
3545 if (err)
3546 return 4;
3547
3548 if (cmd->chanlist) {
3549 unsigned int first_channel = CR_CHAN(cmd->chanlist[0]);
3550 for (i = 1; i < cmd->chanlist_len; i++) {
3551 if (CR_CHAN(cmd->chanlist[i]) != first_channel + i) {
3552 comedi_error(dev,
3553 "chanlist must use consecutive channels");
3554 err++;
3555 break;
3556 }
3557 }
3558 }
3559
3560 if (err)
3561 return 5;
3562
3563 return 0;
3564 }
3565
3566 static int ao_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
3567 {
3568 struct pcidas64_private *devpriv = dev->private;
3569
3570 writew(0x0, devpriv->main_iobase + DAC_CONTROL0_REG);
3571 abort_dma(dev, 0);
3572 return 0;
3573 }
3574
3575 static int dio_callback(int dir, int port, int data, unsigned long arg)
3576 {
3577 void __iomem *iobase = (void __iomem *)arg;
3578 if (dir) {
3579 writeb(data, iobase + port);
3580 DEBUG_PRINT("wrote 0x%x to port %i\n", data, port);
3581 return 0;
3582 } else {
3583 return readb(iobase + port);
3584 }
3585 }
3586
3587 static int dio_callback_4020(int dir, int port, int data, unsigned long arg)
3588 {
3589 void __iomem *iobase = (void __iomem *)arg;
3590 if (dir) {
3591 writew(data, iobase + 2 * port);
3592 return 0;
3593 } else {
3594 return readw(iobase + 2 * port);
3595 }
3596 }
3597
3598 static int di_rbits(struct comedi_device *dev, struct comedi_subdevice *s,
3599 struct comedi_insn *insn, unsigned int *data)
3600 {
3601 struct pcidas64_private *devpriv = dev->private;
3602 unsigned int bits;
3603
3604 bits = readb(devpriv->dio_counter_iobase + DI_REG);
3605 bits &= 0xf;
3606 data[1] = bits;
3607 data[0] = 0;
3608
3609 return insn->n;
3610 }
3611
3612 static int do_wbits(struct comedi_device *dev, struct comedi_subdevice *s,
3613 struct comedi_insn *insn, unsigned int *data)
3614 {
3615 struct pcidas64_private *devpriv = dev->private;
3616
3617 data[0] &= 0xf;
3618 /* zero bits we are going to change */
3619 s->state &= ~data[0];
3620 /* set new bits */
3621 s->state |= data[0] & data[1];
3622
3623 writeb(s->state, devpriv->dio_counter_iobase + DO_REG);
3624
3625 data[1] = s->state;
3626
3627 return insn->n;
3628 }
3629
3630 static int dio_60xx_config_insn(struct comedi_device *dev,
3631 struct comedi_subdevice *s,
3632 struct comedi_insn *insn, unsigned int *data)
3633 {
3634 struct pcidas64_private *devpriv = dev->private;
3635 unsigned int mask;
3636
3637 mask = 1 << CR_CHAN(insn->chanspec);
3638
3639 switch (data[0]) {
3640 case INSN_CONFIG_DIO_INPUT:
3641 s->io_bits &= ~mask;
3642 break;
3643 case INSN_CONFIG_DIO_OUTPUT:
3644 s->io_bits |= mask;
3645 break;
3646 case INSN_CONFIG_DIO_QUERY:
3647 data[1] = (s->io_bits & mask) ? COMEDI_OUTPUT : COMEDI_INPUT;
3648 return 2;
3649 default:
3650 return -EINVAL;
3651 }
3652
3653 writeb(s->io_bits,
3654 devpriv->dio_counter_iobase + DIO_DIRECTION_60XX_REG);
3655
3656 return 1;
3657 }
3658
3659 static int dio_60xx_wbits(struct comedi_device *dev, struct comedi_subdevice *s,
3660 struct comedi_insn *insn, unsigned int *data)
3661 {
3662 struct pcidas64_private *devpriv = dev->private;
3663
3664 if (data[0]) {
3665 s->state &= ~data[0];
3666 s->state |= (data[0] & data[1]);
3667 writeb(s->state,
3668 devpriv->dio_counter_iobase + DIO_DATA_60XX_REG);
3669 }
3670
3671 data[1] = readb(devpriv->dio_counter_iobase + DIO_DATA_60XX_REG);
3672
3673 return insn->n;
3674 }
3675
3676 static void caldac_write(struct comedi_device *dev, unsigned int channel,
3677 unsigned int value)
3678 {
3679 struct pcidas64_private *devpriv = dev->private;
3680
3681 devpriv->caldac_state[channel] = value;
3682
3683 switch (board(dev)->layout) {
3684 case LAYOUT_60XX:
3685 case LAYOUT_64XX:
3686 caldac_8800_write(dev, channel, value);
3687 break;
3688 case LAYOUT_4020:
3689 caldac_i2c_write(dev, channel, value);
3690 break;
3691 default:
3692 break;
3693 }
3694 }
3695
3696 static int calib_write_insn(struct comedi_device *dev,
3697 struct comedi_subdevice *s,
3698 struct comedi_insn *insn, unsigned int *data)
3699 {
3700 struct pcidas64_private *devpriv = dev->private;
3701 int channel = CR_CHAN(insn->chanspec);
3702
3703 /* return immediately if setting hasn't changed, since
3704 * programming these things is slow */
3705 if (devpriv->caldac_state[channel] == data[0])
3706 return 1;
3707
3708 caldac_write(dev, channel, data[0]);
3709
3710 return 1;
3711 }
3712
3713 static int calib_read_insn(struct comedi_device *dev,
3714 struct comedi_subdevice *s, struct comedi_insn *insn,
3715 unsigned int *data)
3716 {
3717 struct pcidas64_private *devpriv = dev->private;
3718 unsigned int channel = CR_CHAN(insn->chanspec);
3719
3720 data[0] = devpriv->caldac_state[channel];
3721
3722 return 1;
3723 }
3724
3725 static void ad8402_write(struct comedi_device *dev, unsigned int channel,
3726 unsigned int value)
3727 {
3728 struct pcidas64_private *devpriv = dev->private;
3729 static const int bitstream_length = 10;
3730 unsigned int bit, register_bits;
3731 unsigned int bitstream = ((channel & 0x3) << 8) | (value & 0xff);
3732 static const int ad8402_udelay = 1;
3733
3734 devpriv->ad8402_state[channel] = value;
3735
3736 register_bits = SELECT_8402_64XX_BIT;
3737 udelay(ad8402_udelay);
3738 writew(register_bits, devpriv->main_iobase + CALIBRATION_REG);
3739
3740 for (bit = 1 << (bitstream_length - 1); bit; bit >>= 1) {
3741 if (bitstream & bit)
3742 register_bits |= SERIAL_DATA_IN_BIT;
3743 else
3744 register_bits &= ~SERIAL_DATA_IN_BIT;
3745 udelay(ad8402_udelay);
3746 writew(register_bits, devpriv->main_iobase + CALIBRATION_REG);
3747 udelay(ad8402_udelay);
3748 writew(register_bits | SERIAL_CLOCK_BIT,
3749 devpriv->main_iobase + CALIBRATION_REG);
3750 }
3751
3752 udelay(ad8402_udelay);
3753 writew(0, devpriv->main_iobase + CALIBRATION_REG);
3754 }
3755
3756 /* for pci-das6402/16, channel 0 is analog input gain and channel 1 is offset */
3757 static int ad8402_write_insn(struct comedi_device *dev,
3758 struct comedi_subdevice *s,
3759 struct comedi_insn *insn, unsigned int *data)
3760 {
3761 struct pcidas64_private *devpriv = dev->private;
3762 int channel = CR_CHAN(insn->chanspec);
3763
3764 /* return immediately if setting hasn't changed, since
3765 * programming these things is slow */
3766 if (devpriv->ad8402_state[channel] == data[0])
3767 return 1;
3768
3769 devpriv->ad8402_state[channel] = data[0];
3770
3771 ad8402_write(dev, channel, data[0]);
3772
3773 return 1;
3774 }
3775
3776 static int ad8402_read_insn(struct comedi_device *dev,
3777 struct comedi_subdevice *s,
3778 struct comedi_insn *insn, unsigned int *data)
3779 {
3780 struct pcidas64_private *devpriv = dev->private;
3781 unsigned int channel = CR_CHAN(insn->chanspec);
3782
3783 data[0] = devpriv->ad8402_state[channel];
3784
3785 return 1;
3786 }
3787
3788 static uint16_t read_eeprom(struct comedi_device *dev, uint8_t address)
3789 {
3790 struct pcidas64_private *devpriv = dev->private;
3791 static const int bitstream_length = 11;
3792 static const int read_command = 0x6;
3793 unsigned int bitstream = (read_command << 8) | address;
3794 unsigned int bit;
3795 void __iomem * const plx_control_addr =
3796 devpriv->plx9080_iobase + PLX_CONTROL_REG;
3797 uint16_t value;
3798 static const int value_length = 16;
3799 static const int eeprom_udelay = 1;
3800
3801 udelay(eeprom_udelay);
3802 devpriv->plx_control_bits &= ~CTL_EE_CLK & ~CTL_EE_CS;
3803 /* make sure we don't send anything to the i2c bus on 4020 */
3804 devpriv->plx_control_bits |= CTL_USERO;
3805 writel(devpriv->plx_control_bits, plx_control_addr);
3806 /* activate serial eeprom */
3807 udelay(eeprom_udelay);
3808 devpriv->plx_control_bits |= CTL_EE_CS;
3809 writel(devpriv->plx_control_bits, plx_control_addr);
3810
3811 /* write read command and desired memory address */
3812 for (bit = 1 << (bitstream_length - 1); bit; bit >>= 1) {
3813 /* set bit to be written */
3814 udelay(eeprom_udelay);
3815 if (bitstream & bit)
3816 devpriv->plx_control_bits |= CTL_EE_W;
3817 else
3818 devpriv->plx_control_bits &= ~CTL_EE_W;
3819 writel(devpriv->plx_control_bits, plx_control_addr);
3820 /* clock in bit */
3821 udelay(eeprom_udelay);
3822 devpriv->plx_control_bits |= CTL_EE_CLK;
3823 writel(devpriv->plx_control_bits, plx_control_addr);
3824 udelay(eeprom_udelay);
3825 devpriv->plx_control_bits &= ~CTL_EE_CLK;
3826 writel(devpriv->plx_control_bits, plx_control_addr);
3827 }
3828 /* read back value from eeprom memory location */
3829 value = 0;
3830 for (bit = 1 << (value_length - 1); bit; bit >>= 1) {
3831 /* clock out bit */
3832 udelay(eeprom_udelay);
3833 devpriv->plx_control_bits |= CTL_EE_CLK;
3834 writel(devpriv->plx_control_bits, plx_control_addr);
3835 udelay(eeprom_udelay);
3836 devpriv->plx_control_bits &= ~CTL_EE_CLK;
3837 writel(devpriv->plx_control_bits, plx_control_addr);
3838 udelay(eeprom_udelay);
3839 if (readl(plx_control_addr) & CTL_EE_R)
3840 value |= bit;
3841 }
3842
3843 /* deactivate eeprom serial input */
3844 udelay(eeprom_udelay);
3845 devpriv->plx_control_bits &= ~CTL_EE_CS;
3846 writel(devpriv->plx_control_bits, plx_control_addr);
3847
3848 return value;
3849 }
3850
3851 static int eeprom_read_insn(struct comedi_device *dev,
3852 struct comedi_subdevice *s,
3853 struct comedi_insn *insn, unsigned int *data)
3854 {
3855 data[0] = read_eeprom(dev, CR_CHAN(insn->chanspec));
3856
3857 return 1;
3858 }
3859
3860 /* utility function that rounds desired timing to an achievable time, and
3861 * sets cmd members appropriately.
3862 * adc paces conversions from master clock by dividing by (x + 3) where x is 24 bit number
3863 */
3864 static void check_adc_timing(struct comedi_device *dev, struct comedi_cmd *cmd)
3865 {
3866 unsigned int convert_divisor = 0, scan_divisor;
3867 static const int min_convert_divisor = 3;
3868 static const int max_convert_divisor =
3869 max_counter_value + min_convert_divisor;
3870 static const int min_scan_divisor_4020 = 2;
3871 unsigned long long max_scan_divisor, min_scan_divisor;
3872
3873 if (cmd->convert_src == TRIG_TIMER) {
3874 if (board(dev)->layout == LAYOUT_4020) {
3875 cmd->convert_arg = 0;
3876 } else {
3877 convert_divisor =
3878 get_divisor(cmd->convert_arg, cmd->flags);
3879 if (convert_divisor > max_convert_divisor)
3880 convert_divisor = max_convert_divisor;
3881 if (convert_divisor < min_convert_divisor)
3882 convert_divisor = min_convert_divisor;
3883 cmd->convert_arg = convert_divisor * TIMER_BASE;
3884 }
3885 } else if (cmd->convert_src == TRIG_NOW)
3886 cmd->convert_arg = 0;
3887
3888 if (cmd->scan_begin_src == TRIG_TIMER) {
3889 scan_divisor = get_divisor(cmd->scan_begin_arg, cmd->flags);
3890 if (cmd->convert_src == TRIG_TIMER) {
3891 /* XXX check for integer overflows */
3892 min_scan_divisor = convert_divisor * cmd->chanlist_len;
3893 max_scan_divisor =
3894 (convert_divisor * cmd->chanlist_len - 1) +
3895 max_counter_value;
3896 } else {
3897 min_scan_divisor = min_scan_divisor_4020;
3898 max_scan_divisor = max_counter_value + min_scan_divisor;
3899 }
3900 if (scan_divisor > max_scan_divisor)
3901 scan_divisor = max_scan_divisor;
3902 if (scan_divisor < min_scan_divisor)
3903 scan_divisor = min_scan_divisor;
3904 cmd->scan_begin_arg = scan_divisor * TIMER_BASE;
3905 }
3906
3907 return;
3908 }
3909
3910 /* Gets nearest achievable timing given master clock speed, does not
3911 * take into account possible minimum/maximum divisor values. Used
3912 * by other timing checking functions. */
3913 static unsigned int get_divisor(unsigned int ns, unsigned int flags)
3914 {
3915 unsigned int divisor;
3916
3917 switch (flags & TRIG_ROUND_MASK) {
3918 case TRIG_ROUND_UP:
3919 divisor = (ns + TIMER_BASE - 1) / TIMER_BASE;
3920 break;
3921 case TRIG_ROUND_DOWN:
3922 divisor = ns / TIMER_BASE;
3923 break;
3924 case TRIG_ROUND_NEAREST:
3925 default:
3926 divisor = (ns + TIMER_BASE / 2) / TIMER_BASE;
3927 break;
3928 }
3929 return divisor;
3930 }
3931
3932 static unsigned int get_ao_divisor(unsigned int ns, unsigned int flags)
3933 {
3934 return get_divisor(ns, flags) - 2;
3935 }
3936
3937 /* adjusts the size of hardware fifo (which determines block size for dma xfers) */
3938 static int set_ai_fifo_size(struct comedi_device *dev, unsigned int num_samples)
3939 {
3940 unsigned int num_fifo_entries;
3941 int retval;
3942 const struct hw_fifo_info *const fifo = board(dev)->ai_fifo;
3943
3944 num_fifo_entries = num_samples / fifo->sample_packing_ratio;
3945
3946 retval = set_ai_fifo_segment_length(dev,
3947 num_fifo_entries /
3948 fifo->num_segments);
3949 if (retval < 0)
3950 return retval;
3951
3952 num_samples = retval * fifo->num_segments * fifo->sample_packing_ratio;
3953
3954 DEBUG_PRINT("set hardware fifo size to %i\n", num_samples);
3955
3956 return num_samples;
3957 }
3958
3959 /* query length of fifo */
3960 static unsigned int ai_fifo_size(struct comedi_device *dev)
3961 {
3962 struct pcidas64_private *devpriv = dev->private;
3963
3964 return devpriv->ai_fifo_segment_length *
3965 board(dev)->ai_fifo->num_segments *
3966 board(dev)->ai_fifo->sample_packing_ratio;
3967 }
3968
3969 static int set_ai_fifo_segment_length(struct comedi_device *dev,
3970 unsigned int num_entries)
3971 {
3972 struct pcidas64_private *devpriv = dev->private;
3973 static const int increment_size = 0x100;
3974 const struct hw_fifo_info *const fifo = board(dev)->ai_fifo;
3975 unsigned int num_increments;
3976 uint16_t bits;
3977
3978 if (num_entries < increment_size)
3979 num_entries = increment_size;
3980 if (num_entries > fifo->max_segment_length)
3981 num_entries = fifo->max_segment_length;
3982
3983 /* 1 == 256 entries, 2 == 512 entries, etc */
3984 num_increments = (num_entries + increment_size / 2) / increment_size;
3985
3986 bits = (~(num_increments - 1)) & fifo->fifo_size_reg_mask;
3987 devpriv->fifo_size_bits &= ~fifo->fifo_size_reg_mask;
3988 devpriv->fifo_size_bits |= bits;
3989 writew(devpriv->fifo_size_bits,
3990 devpriv->main_iobase + FIFO_SIZE_REG);
3991
3992 devpriv->ai_fifo_segment_length = num_increments * increment_size;
3993
3994 DEBUG_PRINT("set hardware fifo segment length to %i\n",
3995 devpriv->ai_fifo_segment_length);
3996
3997 return devpriv->ai_fifo_segment_length;
3998 }
3999
4000 /* pci-6025 8800 caldac:
4001 * address 0 == dac channel 0 offset
4002 * address 1 == dac channel 0 gain
4003 * address 2 == dac channel 1 offset
4004 * address 3 == dac channel 1 gain
4005 * address 4 == fine adc offset
4006 * address 5 == coarse adc offset
4007 * address 6 == coarse adc gain
4008 * address 7 == fine adc gain
4009 */
4010 /* pci-6402/16 uses all 8 channels for dac:
4011 * address 0 == dac channel 0 fine gain
4012 * address 1 == dac channel 0 coarse gain
4013 * address 2 == dac channel 0 coarse offset
4014 * address 3 == dac channel 1 coarse offset
4015 * address 4 == dac channel 1 fine gain
4016 * address 5 == dac channel 1 coarse gain
4017 * address 6 == dac channel 0 fine offset
4018 * address 7 == dac channel 1 fine offset
4019 */
4020
4021 static int caldac_8800_write(struct comedi_device *dev, unsigned int address,
4022 uint8_t value)
4023 {
4024 struct pcidas64_private *devpriv = dev->private;
4025 static const int num_caldac_channels = 8;
4026 static const int bitstream_length = 11;
4027 unsigned int bitstream = ((address & 0x7) << 8) | value;
4028 unsigned int bit, register_bits;
4029 static const int caldac_8800_udelay = 1;
4030
4031 if (address >= num_caldac_channels) {
4032 comedi_error(dev, "illegal caldac channel");
4033 return -1;
4034 }
4035 for (bit = 1 << (bitstream_length - 1); bit; bit >>= 1) {
4036 register_bits = 0;
4037 if (bitstream & bit)
4038 register_bits |= SERIAL_DATA_IN_BIT;
4039 udelay(caldac_8800_udelay);
4040 writew(register_bits, devpriv->main_iobase + CALIBRATION_REG);
4041 register_bits |= SERIAL_CLOCK_BIT;
4042 udelay(caldac_8800_udelay);
4043 writew(register_bits, devpriv->main_iobase + CALIBRATION_REG);
4044 }
4045 udelay(caldac_8800_udelay);
4046 writew(SELECT_8800_BIT, devpriv->main_iobase + CALIBRATION_REG);
4047 udelay(caldac_8800_udelay);
4048 writew(0, devpriv->main_iobase + CALIBRATION_REG);
4049 udelay(caldac_8800_udelay);
4050 return 0;
4051 }
4052
4053 /* 4020 caldacs */
4054 static int caldac_i2c_write(struct comedi_device *dev,
4055 unsigned int caldac_channel, unsigned int value)
4056 {
4057 uint8_t serial_bytes[3];
4058 uint8_t i2c_addr;
4059 enum pointer_bits {
4060 /* manual has gain and offset bits switched */
4061 OFFSET_0_2 = 0x1,
4062 GAIN_0_2 = 0x2,
4063 OFFSET_1_3 = 0x4,
4064 GAIN_1_3 = 0x8,
4065 };
4066 enum data_bits {
4067 NOT_CLEAR_REGISTERS = 0x20,
4068 };
4069
4070 switch (caldac_channel) {
4071 case 0: /* chan 0 offset */
4072 i2c_addr = CALDAC0_I2C_ADDR;
4073 serial_bytes[0] = OFFSET_0_2;
4074 break;
4075 case 1: /* chan 1 offset */
4076 i2c_addr = CALDAC0_I2C_ADDR;
4077 serial_bytes[0] = OFFSET_1_3;
4078 break;
4079 case 2: /* chan 2 offset */
4080 i2c_addr = CALDAC1_I2C_ADDR;
4081 serial_bytes[0] = OFFSET_0_2;
4082 break;
4083 case 3: /* chan 3 offset */
4084 i2c_addr = CALDAC1_I2C_ADDR;
4085 serial_bytes[0] = OFFSET_1_3;
4086 break;
4087 case 4: /* chan 0 gain */
4088 i2c_addr = CALDAC0_I2C_ADDR;
4089 serial_bytes[0] = GAIN_0_2;
4090 break;
4091 case 5: /* chan 1 gain */
4092 i2c_addr = CALDAC0_I2C_ADDR;
4093 serial_bytes[0] = GAIN_1_3;
4094 break;
4095 case 6: /* chan 2 gain */
4096 i2c_addr = CALDAC1_I2C_ADDR;
4097 serial_bytes[0] = GAIN_0_2;
4098 break;
4099 case 7: /* chan 3 gain */
4100 i2c_addr = CALDAC1_I2C_ADDR;
4101 serial_bytes[0] = GAIN_1_3;
4102 break;
4103 default:
4104 comedi_error(dev, "invalid caldac channel\n");
4105 return -1;
4106 break;
4107 }
4108 serial_bytes[1] = NOT_CLEAR_REGISTERS | ((value >> 8) & 0xf);
4109 serial_bytes[2] = value & 0xff;
4110 i2c_write(dev, i2c_addr, serial_bytes, 3);
4111 return 0;
4112 }
4113
4114 /* Their i2c requires a huge delay on setting clock or data high for some reason */
4115 static const int i2c_high_udelay = 1000;
4116 static const int i2c_low_udelay = 10;
4117
4118 /* set i2c data line high or low */
4119 static void i2c_set_sda(struct comedi_device *dev, int state)
4120 {
4121 struct pcidas64_private *devpriv = dev->private;
4122 static const int data_bit = CTL_EE_W;
4123 void __iomem *plx_control_addr = devpriv->plx9080_iobase +
4124 PLX_CONTROL_REG;
4125
4126 if (state) {
4127 /* set data line high */
4128 devpriv->plx_control_bits &= ~data_bit;
4129 writel(devpriv->plx_control_bits, plx_control_addr);
4130 udelay(i2c_high_udelay);
4131 } else { /* set data line low */
4132
4133 devpriv->plx_control_bits |= data_bit;
4134 writel(devpriv->plx_control_bits, plx_control_addr);
4135 udelay(i2c_low_udelay);
4136 }
4137 }
4138
4139 /* set i2c clock line high or low */
4140 static void i2c_set_scl(struct comedi_device *dev, int state)
4141 {
4142 struct pcidas64_private *devpriv = dev->private;
4143 static const int clock_bit = CTL_USERO;
4144 void __iomem *plx_control_addr = devpriv->plx9080_iobase +
4145 PLX_CONTROL_REG;
4146
4147 if (state) {
4148 /* set clock line high */
4149 devpriv->plx_control_bits &= ~clock_bit;
4150 writel(devpriv->plx_control_bits, plx_control_addr);
4151 udelay(i2c_high_udelay);
4152 } else { /* set clock line low */
4153
4154 devpriv->plx_control_bits |= clock_bit;
4155 writel(devpriv->plx_control_bits, plx_control_addr);
4156 udelay(i2c_low_udelay);
4157 }
4158 }
4159
4160 static void i2c_write_byte(struct comedi_device *dev, uint8_t byte)
4161 {
4162 uint8_t bit;
4163 unsigned int num_bits = 8;
4164
4165 DEBUG_PRINT("writing to i2c byte 0x%x\n", byte);
4166
4167 for (bit = 1 << (num_bits - 1); bit; bit >>= 1) {
4168 i2c_set_scl(dev, 0);
4169 if ((byte & bit))
4170 i2c_set_sda(dev, 1);
4171 else
4172 i2c_set_sda(dev, 0);
4173 i2c_set_scl(dev, 1);
4174 }
4175 }
4176
4177 /* we can't really read the lines, so fake it */
4178 static int i2c_read_ack(struct comedi_device *dev)
4179 {
4180 i2c_set_scl(dev, 0);
4181 i2c_set_sda(dev, 1);
4182 i2c_set_scl(dev, 1);
4183
4184 return 0; /* return fake acknowledge bit */
4185 }
4186
4187 /* send start bit */
4188 static void i2c_start(struct comedi_device *dev)
4189 {
4190 i2c_set_scl(dev, 1);
4191 i2c_set_sda(dev, 1);
4192 i2c_set_sda(dev, 0);
4193 }
4194
4195 /* send stop bit */
4196 static void i2c_stop(struct comedi_device *dev)
4197 {
4198 i2c_set_scl(dev, 0);
4199 i2c_set_sda(dev, 0);
4200 i2c_set_scl(dev, 1);
4201 i2c_set_sda(dev, 1);
4202 }
4203
4204 static void i2c_write(struct comedi_device *dev, unsigned int address,
4205 const uint8_t *data, unsigned int length)
4206 {
4207 struct pcidas64_private *devpriv = dev->private;
4208 unsigned int i;
4209 uint8_t bitstream;
4210 static const int read_bit = 0x1;
4211
4212 /* XXX need mutex to prevent simultaneous attempts to access eeprom and i2c bus */
4213
4214 /* make sure we dont send anything to eeprom */
4215 devpriv->plx_control_bits &= ~CTL_EE_CS;
4216
4217 i2c_stop(dev);
4218 i2c_start(dev);
4219
4220 /* send address and write bit */
4221 bitstream = (address << 1) & ~read_bit;
4222 i2c_write_byte(dev, bitstream);
4223
4224 /* get acknowledge */
4225 if (i2c_read_ack(dev) != 0) {
4226 comedi_error(dev, "i2c write failed: no acknowledge");
4227 i2c_stop(dev);
4228 return;
4229 }
4230 /* write data bytes */
4231 for (i = 0; i < length; i++) {
4232 i2c_write_byte(dev, data[i]);
4233 if (i2c_read_ack(dev) != 0) {
4234 comedi_error(dev, "i2c write failed: no acknowledge");
4235 i2c_stop(dev);
4236 return;
4237 }
4238 }
4239 i2c_stop(dev);
4240 }
4241
4242 static struct comedi_driver cb_pcidas64_driver = {
4243 .driver_name = "cb_pcidas64",
4244 .module = THIS_MODULE,
4245 .attach = attach,
4246 .detach = detach,
4247 };
4248
4249 static int __devinit cb_pcidas64_pci_probe(struct pci_dev *dev,
4250 const struct pci_device_id *ent)
4251 {
4252 return comedi_pci_auto_config(dev, &cb_pcidas64_driver);
4253 }
4254
4255 static void __devexit cb_pcidas64_pci_remove(struct pci_dev *dev)
4256 {
4257 comedi_pci_auto_unconfig(dev);
4258 }
4259
4260 static DEFINE_PCI_DEVICE_TABLE(cb_pcidas64_pci_table) = {
4261 { PCI_DEVICE(PCI_VENDOR_ID_COMPUTERBOARDS, 0x001d) },
4262 { PCI_DEVICE(PCI_VENDOR_ID_COMPUTERBOARDS, 0x001e) },
4263 { PCI_DEVICE(PCI_VENDOR_ID_COMPUTERBOARDS, 0x0035) },
4264 { PCI_DEVICE(PCI_VENDOR_ID_COMPUTERBOARDS, 0x0036) },
4265 { PCI_DEVICE(PCI_VENDOR_ID_COMPUTERBOARDS, 0x0037) },
4266 { PCI_DEVICE(PCI_VENDOR_ID_COMPUTERBOARDS, 0x0052) },
4267 { PCI_DEVICE(PCI_VENDOR_ID_COMPUTERBOARDS, 0x005d) },
4268 { PCI_DEVICE(PCI_VENDOR_ID_COMPUTERBOARDS, 0x005e) },
4269 { PCI_DEVICE(PCI_VENDOR_ID_COMPUTERBOARDS, 0x005f) },
4270 { PCI_DEVICE(PCI_VENDOR_ID_COMPUTERBOARDS, 0x0061) },
4271 { PCI_DEVICE(PCI_VENDOR_ID_COMPUTERBOARDS, 0x0062) },
4272 { PCI_DEVICE(PCI_VENDOR_ID_COMPUTERBOARDS, 0x0063) },
4273 { PCI_DEVICE(PCI_VENDOR_ID_COMPUTERBOARDS, 0x0064) },
4274 { PCI_DEVICE(PCI_VENDOR_ID_COMPUTERBOARDS, 0x0066) },
4275 { PCI_DEVICE(PCI_VENDOR_ID_COMPUTERBOARDS, 0x0067) },
4276 { PCI_DEVICE(PCI_VENDOR_ID_COMPUTERBOARDS, 0x0068) },
4277 { PCI_DEVICE(PCI_VENDOR_ID_COMPUTERBOARDS, 0x006f) },
4278 { PCI_DEVICE(PCI_VENDOR_ID_COMPUTERBOARDS, 0x0078) },
4279 { PCI_DEVICE(PCI_VENDOR_ID_COMPUTERBOARDS, 0x0079) },
4280 { 0 }
4281 };
4282 MODULE_DEVICE_TABLE(pci, cb_pcidas64_pci_table);
4283
4284 static struct pci_driver cb_pcidas64_pci_driver = {
4285 .name = "cb_pcidas64",
4286 .id_table = cb_pcidas64_pci_table,
4287 .probe = cb_pcidas64_pci_probe,
4288 .remove = __devexit_p(cb_pcidas64_pci_remove),
4289 };
4290 module_comedi_pci_driver(cb_pcidas64_driver, cb_pcidas64_pci_driver);
4291
4292 MODULE_AUTHOR("Comedi http://www.comedi.org");
4293 MODULE_DESCRIPTION("Comedi low-level driver");
4294 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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