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Staging: comedi: cb_pcidas64: fix up build warnings
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / staging / comedi / drivers / cb_pcidas64.c
blob79aa286e9bb4a796d19d31f715c19e36b85f5c4b
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 #include <asm/system.h>
90
91 #include "comedi_pci.h"
92 #include "8253.h"
93 #include "8255.h"
94 #include "plx9080.h"
95 #include "comedi_fc.h"
96
97 #undef PCIDAS64_DEBUG /* disable debugging code */
98 /* #define PCIDAS64_DEBUG enable debugging code */
99
100 #ifdef PCIDAS64_DEBUG
101 #define DEBUG_PRINT(format, args...) printk(format , ## args)
102 #else
103 #define DEBUG_PRINT(format, args...)
104 #endif
105
106 #define TIMER_BASE 25 /* 40MHz master clock */
107 #define PRESCALED_TIMER_BASE 10000 /* 100kHz 'prescaled' clock for slow aquisition, maybe I'll support this someday */
108 #define DMA_BUFFER_SIZE 0x1000
109
110 #define PCI_VENDOR_ID_COMPUTERBOARDS 0x1307
111
112 /* maximum value that can be loaded into board's 24-bit counters*/
113 static const int max_counter_value = 0xffffff;
114
115 /* PCI-DAS64xxx base addresses */
116
117 /* indices of base address regions */
118 enum base_address_regions {
119 PLX9080_BADDRINDEX = 0,
120 MAIN_BADDRINDEX = 2,
121 DIO_COUNTER_BADDRINDEX = 3,
122 };
123
124 /* priv(dev)->main_iobase registers */
125 enum write_only_registers {
126 INTR_ENABLE_REG = 0x0, /* interrupt enable register */
127 HW_CONFIG_REG = 0x2, /* hardware config register */
128 DAQ_SYNC_REG = 0xc,
129 DAQ_ATRIG_LOW_4020_REG = 0xc,
130 ADC_CONTROL0_REG = 0x10, /* adc control register 0 */
131 ADC_CONTROL1_REG = 0x12, /* adc control register 1 */
132 CALIBRATION_REG = 0x14,
133 ADC_SAMPLE_INTERVAL_LOWER_REG = 0x16, /* lower 16 bits of adc sample interval counter */
134 ADC_SAMPLE_INTERVAL_UPPER_REG = 0x18, /* upper 8 bits of adc sample interval counter */
135 ADC_DELAY_INTERVAL_LOWER_REG = 0x1a, /* lower 16 bits of delay interval counter */
136 ADC_DELAY_INTERVAL_UPPER_REG = 0x1c, /* upper 8 bits of delay interval counter */
137 ADC_COUNT_LOWER_REG = 0x1e, /* lower 16 bits of hardware conversion/scan counter */
138 ADC_COUNT_UPPER_REG = 0x20, /* upper 8 bits of hardware conversion/scan counter */
139 ADC_START_REG = 0x22, /* software trigger to start aquisition */
140 ADC_CONVERT_REG = 0x24, /* initiates single conversion */
141 ADC_QUEUE_CLEAR_REG = 0x26, /* clears adc queue */
142 ADC_QUEUE_LOAD_REG = 0x28, /* loads adc queue */
143 ADC_BUFFER_CLEAR_REG = 0x2a,
144 ADC_QUEUE_HIGH_REG = 0x2c, /* high channel for internal queue, use adc_chan_bits() inline above */
145 DAC_CONTROL0_REG = 0x50, /* dac control register 0 */
146 DAC_CONTROL1_REG = 0x52, /* dac control register 0 */
147 DAC_SAMPLE_INTERVAL_LOWER_REG = 0x54, /* lower 16 bits of dac sample interval counter */
148 DAC_SAMPLE_INTERVAL_UPPER_REG = 0x56, /* upper 8 bits of dac sample interval counter */
149 DAC_SELECT_REG = 0x60,
150 DAC_START_REG = 0x64,
151 DAC_BUFFER_CLEAR_REG = 0x66, /* clear dac buffer */
152 };
153 static inline unsigned int dac_convert_reg(unsigned int channel)
154 {
155 return 0x70 + (2 * (channel & 0x1));
156 }
157
158 static inline unsigned int dac_lsb_4020_reg(unsigned int channel)
159 {
160 return 0x70 + (4 * (channel & 0x1));
161 }
162
163 static inline unsigned int dac_msb_4020_reg(unsigned int channel)
164 {
165 return 0x72 + (4 * (channel & 0x1));
166 }
167
168 enum read_only_registers {
169 HW_STATUS_REG = 0x0, /* hardware status register, reading this apparently clears pending interrupts as well */
170 PIPE1_READ_REG = 0x4,
171 ADC_READ_PNTR_REG = 0x8,
172 LOWER_XFER_REG = 0x10,
173 ADC_WRITE_PNTR_REG = 0xc,
174 PREPOST_REG = 0x14,
175 };
176
177 enum read_write_registers {
178 I8255_4020_REG = 0x48, /* 8255 offset, for 4020 only */
179 ADC_QUEUE_FIFO_REG = 0x100, /* external channel/gain queue, uses same bits as ADC_QUEUE_LOAD_REG */
180 ADC_FIFO_REG = 0x200, /* adc data fifo */
181 DAC_FIFO_REG = 0x300, /* dac data fifo, has weird interactions with external channel queue */
182 };
183
184 /* priv(dev)->dio_counter_iobase registers */
185 enum dio_counter_registers {
186 DIO_8255_OFFSET = 0x0,
187 DO_REG = 0x20,
188 DI_REG = 0x28,
189 DIO_DIRECTION_60XX_REG = 0x40,
190 DIO_DATA_60XX_REG = 0x48,
191 };
192
193 /* bit definitions for write-only registers */
194
195 enum intr_enable_contents {
196 ADC_INTR_SRC_MASK = 0x3, /* bits that set adc interrupt source */
197 ADC_INTR_QFULL_BITS = 0x0, /* interrupt fifo quater full */
198 ADC_INTR_EOC_BITS = 0x1, /* interrupt end of conversion */
199 ADC_INTR_EOSCAN_BITS = 0x2, /* interrupt end of scan */
200 ADC_INTR_EOSEQ_BITS = 0x3, /* interrupt end of sequence (probably wont use this it's pretty fancy) */
201 EN_ADC_INTR_SRC_BIT = 0x4, /* enable adc interrupt source */
202 EN_ADC_DONE_INTR_BIT = 0x8, /* enable adc aquisition done interrupt */
203 DAC_INTR_SRC_MASK = 0x30,
204 DAC_INTR_QEMPTY_BITS = 0x0,
205 DAC_INTR_HIGH_CHAN_BITS = 0x10,
206 EN_DAC_INTR_SRC_BIT = 0x40, /* enable dac interrupt source */
207 EN_DAC_DONE_INTR_BIT = 0x80,
208 EN_ADC_ACTIVE_INTR_BIT = 0x200, /* enable adc active interrupt */
209 EN_ADC_STOP_INTR_BIT = 0x400, /* enable adc stop trigger interrupt */
210 EN_DAC_ACTIVE_INTR_BIT = 0x800, /* enable dac active interrupt */
211 EN_DAC_UNDERRUN_BIT = 0x4000, /* enable dac underrun status bit */
212 EN_ADC_OVERRUN_BIT = 0x8000, /* enable adc overrun status bit */
213 };
214
215 enum hw_config_contents {
216 MASTER_CLOCK_4020_MASK = 0x3, /* bits that specify master clock source for 4020 */
217 INTERNAL_CLOCK_4020_BITS = 0x1, /* use 40 MHz internal master clock for 4020 */
218 BNC_CLOCK_4020_BITS = 0x2, /* use BNC input for master clock */
219 EXT_CLOCK_4020_BITS = 0x3, /* use dio input for master clock */
220 EXT_QUEUE_BIT = 0x200, /* use external channel/gain queue (more versatile than internal queue) */
221 SLOW_DAC_BIT = 0x400, /* use 225 nanosec strobe when loading dac instead of 50 nanosec */
222 HW_CONFIG_DUMMY_BITS = 0x2000, /* bit with unknown function yet given as default value in pci-das64 manual */
223 DMA_CH_SELECT_BIT = 0x8000, /* bit selects channels 1/0 for analog input/output, otherwise 0/1 */
224 FIFO_SIZE_REG = 0x4, /* allows adjustment of fifo sizes */
225 DAC_FIFO_SIZE_MASK = 0xff00, /* bits that set dac fifo size */
226 DAC_FIFO_BITS = 0xf800, /* 8k sample ao fifo */
227 };
228 #define DAC_FIFO_SIZE 0x2000
229
230 enum daq_atrig_low_4020_contents {
231 EXT_AGATE_BNC_BIT = 0x8000, /* use trig/ext clk bnc input for analog gate signal */
232 EXT_STOP_TRIG_BNC_BIT = 0x4000, /* use trig/ext clk bnc input for external stop trigger signal */
233 EXT_START_TRIG_BNC_BIT = 0x2000, /* use trig/ext clk bnc input for external start trigger signal */
234 };
235 static inline uint16_t analog_trig_low_threshold_bits(uint16_t threshold)
236 {
237 return threshold & 0xfff;
238 }
239
240 enum adc_control0_contents {
241 ADC_GATE_SRC_MASK = 0x3, /* bits that select gate */
242 ADC_SOFT_GATE_BITS = 0x1, /* software gate */
243 ADC_EXT_GATE_BITS = 0x2, /* external digital gate */
244 ADC_ANALOG_GATE_BITS = 0x3, /* analog level gate */
245 ADC_GATE_LEVEL_BIT = 0x4, /* level-sensitive gate (for digital) */
246 ADC_GATE_POLARITY_BIT = 0x8, /* gate active low */
247 ADC_START_TRIG_SOFT_BITS = 0x10,
248 ADC_START_TRIG_EXT_BITS = 0x20,
249 ADC_START_TRIG_ANALOG_BITS = 0x30,
250 ADC_START_TRIG_MASK = 0x30,
251 ADC_START_TRIG_FALLING_BIT = 0x40, /* trig 1 uses falling edge */
252 ADC_EXT_CONV_FALLING_BIT = 0x800, /* external pacing uses falling edge */
253 ADC_SAMPLE_COUNTER_EN_BIT = 0x1000, /* enable hardware scan counter */
254 ADC_DMA_DISABLE_BIT = 0x4000, /* disables dma */
255 ADC_ENABLE_BIT = 0x8000, /* master adc enable */
256 };
257
258 enum adc_control1_contents {
259 ADC_QUEUE_CONFIG_BIT = 0x1, /* should be set for boards with > 16 channels */
260 CONVERT_POLARITY_BIT = 0x10,
261 EOC_POLARITY_BIT = 0x20,
262 ADC_SW_GATE_BIT = 0x40, /* software gate of adc */
263 ADC_DITHER_BIT = 0x200, /* turn on extra noise for dithering */
264 RETRIGGER_BIT = 0x800,
265 ADC_LO_CHANNEL_4020_MASK = 0x300,
266 ADC_HI_CHANNEL_4020_MASK = 0xc00,
267 TWO_CHANNEL_4020_BITS = 0x1000, /* two channel mode for 4020 */
268 FOUR_CHANNEL_4020_BITS = 0x2000, /* four channel mode for 4020 */
269 CHANNEL_MODE_4020_MASK = 0x3000,
270 ADC_MODE_MASK = 0xf000,
271 };
272 static inline uint16_t adc_lo_chan_4020_bits(unsigned int channel)
273 {
274 return (channel & 0x3) << 8;
275 };
276
277 static inline uint16_t adc_hi_chan_4020_bits(unsigned int channel)
278 {
279 return (channel & 0x3) << 10;
280 };
281
282 static inline uint16_t adc_mode_bits(unsigned int mode)
283 {
284 return (mode & 0xf) << 12;
285 };
286
287 enum calibration_contents {
288 SELECT_8800_BIT = 0x1,
289 SELECT_8402_64XX_BIT = 0x2,
290 SELECT_1590_60XX_BIT = 0x2,
291 CAL_EN_64XX_BIT = 0x40, /* calibration enable for 64xx series */
292 SERIAL_DATA_IN_BIT = 0x80,
293 SERIAL_CLOCK_BIT = 0x100,
294 CAL_EN_60XX_BIT = 0x200, /* calibration enable for 60xx series */
295 CAL_GAIN_BIT = 0x800,
296 };
297 /* calibration sources for 6025 are:
298 * 0 : ground
299 * 1 : 10V
300 * 2 : 5V
301 * 3 : 0.5V
302 * 4 : 0.05V
303 * 5 : ground
304 * 6 : dac channel 0
305 * 7 : dac channel 1
306 */
307 static inline uint16_t adc_src_bits(unsigned int source)
308 {
309 return (source & 0xf) << 3;
310 };
311
312 static inline uint16_t adc_convert_chan_4020_bits(unsigned int channel)
313 {
314 return (channel & 0x3) << 8;
315 };
316
317 enum adc_queue_load_contents {
318 UNIP_BIT = 0x800, /* unipolar/bipolar bit */
319 ADC_SE_DIFF_BIT = 0x1000, /* single-ended/ differential bit */
320 ADC_COMMON_BIT = 0x2000, /* non-referenced single-ended (common-mode input) */
321 QUEUE_EOSEQ_BIT = 0x4000, /* queue end of sequence */
322 QUEUE_EOSCAN_BIT = 0x8000, /* queue end of scan */
323 };
324 static inline uint16_t adc_chan_bits(unsigned int channel)
325 {
326 return channel & 0x3f;
327 };
328
329 enum dac_control0_contents {
330 DAC_ENABLE_BIT = 0x8000, /* dac controller enable bit */
331 DAC_CYCLIC_STOP_BIT = 0x4000,
332 DAC_WAVEFORM_MODE_BIT = 0x100,
333 DAC_EXT_UPDATE_FALLING_BIT = 0x80,
334 DAC_EXT_UPDATE_ENABLE_BIT = 0x40,
335 WAVEFORM_TRIG_MASK = 0x30,
336 WAVEFORM_TRIG_DISABLED_BITS = 0x0,
337 WAVEFORM_TRIG_SOFT_BITS = 0x10,
338 WAVEFORM_TRIG_EXT_BITS = 0x20,
339 WAVEFORM_TRIG_ADC1_BITS = 0x30,
340 WAVEFORM_TRIG_FALLING_BIT = 0x8,
341 WAVEFORM_GATE_LEVEL_BIT = 0x4,
342 WAVEFORM_GATE_ENABLE_BIT = 0x2,
343 WAVEFORM_GATE_SELECT_BIT = 0x1,
344 };
345
346 enum dac_control1_contents {
347 DAC_WRITE_POLARITY_BIT = 0x800, /* board-dependent setting */
348 DAC1_EXT_REF_BIT = 0x200,
349 DAC0_EXT_REF_BIT = 0x100,
350 DAC_OUTPUT_ENABLE_BIT = 0x80, /* dac output enable bit */
351 DAC_UPDATE_POLARITY_BIT = 0x40, /* board-dependent setting */
352 DAC_SW_GATE_BIT = 0x20,
353 DAC1_UNIPOLAR_BIT = 0x8,
354 DAC0_UNIPOLAR_BIT = 0x2,
355 };
356
357 /* bit definitions for read-only registers */
358 enum hw_status_contents {
359 DAC_UNDERRUN_BIT = 0x1,
360 ADC_OVERRUN_BIT = 0x2,
361 DAC_ACTIVE_BIT = 0x4,
362 ADC_ACTIVE_BIT = 0x8,
363 DAC_INTR_PENDING_BIT = 0x10,
364 ADC_INTR_PENDING_BIT = 0x20,
365 DAC_DONE_BIT = 0x40,
366 ADC_DONE_BIT = 0x80,
367 EXT_INTR_PENDING_BIT = 0x100,
368 ADC_STOP_BIT = 0x200,
369 };
370 static inline uint16_t pipe_full_bits(uint16_t hw_status_bits)
371 {
372 return (hw_status_bits >> 10) & 0x3;
373 };
374
375 static inline unsigned int dma_chain_flag_bits(uint16_t prepost_bits)
376 {
377 return (prepost_bits >> 6) & 0x3;
378 }
379
380 static inline unsigned int adc_upper_read_ptr_code(uint16_t prepost_bits)
381 {
382 return (prepost_bits >> 12) & 0x3;
383 }
384
385 static inline unsigned int adc_upper_write_ptr_code(uint16_t prepost_bits)
386 {
387 return (prepost_bits >> 14) & 0x3;
388 }
389
390 /* I2C addresses for 4020 */
391 enum i2c_addresses {
392 RANGE_CAL_I2C_ADDR = 0x20,
393 CALDAC0_I2C_ADDR = 0xc,
394 CALDAC1_I2C_ADDR = 0xd,
395 };
396
397 enum range_cal_i2c_contents {
398 ADC_SRC_4020_MASK = 0x70, /* bits that set what source the adc converter measures */
399 BNC_TRIG_THRESHOLD_0V_BIT = 0x80, /* make bnc trig/ext clock threshold 0V instead of 2.5V */
400 };
401 static inline uint8_t adc_src_4020_bits(unsigned int source)
402 {
403 return (source << 4) & ADC_SRC_4020_MASK;
404 };
405
406 static inline uint8_t attenuate_bit(unsigned int channel)
407 {
408 /* attenuate channel (+-5V input range) */
409 return 1 << (channel & 0x3);
410 };
411
412 /* analog input ranges for 64xx boards */
413 static const struct comedi_lrange ai_ranges_64xx = {
414 8,
415 {
416 BIP_RANGE(10),
417 BIP_RANGE(5),
418 BIP_RANGE(2.5),
419 BIP_RANGE(1.25),
420 UNI_RANGE(10),
421 UNI_RANGE(5),
422 UNI_RANGE(2.5),
423 UNI_RANGE(1.25)
424 }
425 };
426
427 /* analog input ranges for 60xx boards */
428 static const struct comedi_lrange ai_ranges_60xx = {
429 4,
430 {
431 BIP_RANGE(10),
432 BIP_RANGE(5),
433 BIP_RANGE(0.5),
434 BIP_RANGE(0.05),
435 }
436 };
437
438 /* analog input ranges for 6030, etc boards */
439 static const struct comedi_lrange ai_ranges_6030 = {
440 14,
441 {
442 BIP_RANGE(10),
443 BIP_RANGE(5),
444 BIP_RANGE(2),
445 BIP_RANGE(1),
446 BIP_RANGE(0.5),
447 BIP_RANGE(0.2),
448 BIP_RANGE(0.1),
449 UNI_RANGE(10),
450 UNI_RANGE(5),
451 UNI_RANGE(2),
452 UNI_RANGE(1),
453 UNI_RANGE(0.5),
454 UNI_RANGE(0.2),
455 UNI_RANGE(0.1),
456 }
457 };
458
459 /* analog input ranges for 6052, etc boards */
460 static const struct comedi_lrange ai_ranges_6052 = {
461 15,
462 {
463 BIP_RANGE(10),
464 BIP_RANGE(5),
465 BIP_RANGE(2.5),
466 BIP_RANGE(1),
467 BIP_RANGE(0.5),
468 BIP_RANGE(0.25),
469 BIP_RANGE(0.1),
470 BIP_RANGE(0.05),
471 UNI_RANGE(10),
472 UNI_RANGE(5),
473 UNI_RANGE(2),
474 UNI_RANGE(1),
475 UNI_RANGE(0.5),
476 UNI_RANGE(0.2),
477 UNI_RANGE(0.1),
478 }
479 };
480
481 /* analog input ranges for 4020 board */
482 static const struct comedi_lrange ai_ranges_4020 = {
483 2,
484 {
485 BIP_RANGE(5),
486 BIP_RANGE(1),
487 }
488 };
489
490 /* analog output ranges */
491 static const struct comedi_lrange ao_ranges_64xx = {
492 4,
493 {
494 BIP_RANGE(5),
495 BIP_RANGE(10),
496 UNI_RANGE(5),
497 UNI_RANGE(10),
498 }
499 };
500
501 static const int ao_range_code_64xx[] = {
502 0x0,
503 0x1,
504 0x2,
505 0x3,
506 };
507
508 static const struct comedi_lrange ao_ranges_60xx = {
509 1,
510 {
511 BIP_RANGE(10),
512 }
513 };
514
515 static const int ao_range_code_60xx[] = {
516 0x0,
517 };
518
519 static const struct comedi_lrange ao_ranges_6030 = {
520 2,
521 {
522 BIP_RANGE(10),
523 UNI_RANGE(10),
524 }
525 };
526
527 static const int ao_range_code_6030[] = {
528 0x0,
529 0x2,
530 };
531
532 static const struct comedi_lrange ao_ranges_4020 = {
533 2,
534 {
535 BIP_RANGE(5),
536 BIP_RANGE(10),
537 }
538 };
539
540 static const int ao_range_code_4020[] = {
541 0x1,
542 0x0,
543 };
544
545 enum register_layout {
546 LAYOUT_60XX,
547 LAYOUT_64XX,
548 LAYOUT_4020,
549 };
550
551 struct hw_fifo_info {
552 unsigned int num_segments;
553 unsigned int max_segment_length;
554 unsigned int sample_packing_ratio;
555 uint16_t fifo_size_reg_mask;
556 };
557
558 struct pcidas64_board {
559 const char *name;
560 int device_id; /* pci device id */
561 int ai_se_chans; /* number of ai inputs in single-ended mode */
562 int ai_bits; /* analog input resolution */
563 int ai_speed; /* fastest conversion period in ns */
564 const struct comedi_lrange *ai_range_table;
565 int ao_nchan; /* number of analog out channels */
566 int ao_bits; /* analog output resolution */
567 int ao_scan_speed; /* analog output speed (for a scan, not conversion) */
568 const struct comedi_lrange *ao_range_table;
569 const int *ao_range_code;
570 const struct hw_fifo_info *const ai_fifo;
571 enum register_layout layout; /* different board families have slightly different registers */
572 unsigned has_8255:1;
573 };
574
575 static const struct hw_fifo_info ai_fifo_4020 = {
576 .num_segments = 2,
577 .max_segment_length = 0x8000,
578 .sample_packing_ratio = 2,
579 .fifo_size_reg_mask = 0x7f,
580 };
581
582 static const struct hw_fifo_info ai_fifo_64xx = {
583 .num_segments = 4,
584 .max_segment_length = 0x800,
585 .sample_packing_ratio = 1,
586 .fifo_size_reg_mask = 0x3f,
587 };
588
589 static const struct hw_fifo_info ai_fifo_60xx = {
590 .num_segments = 4,
591 .max_segment_length = 0x800,
592 .sample_packing_ratio = 1,
593 .fifo_size_reg_mask = 0x7f,
594 };
595
596 /* maximum number of dma transfers we will chain together into a ring
597 * (and the maximum number of dma buffers we maintain) */
598 #define MAX_AI_DMA_RING_COUNT (0x80000 / DMA_BUFFER_SIZE)
599 #define MIN_AI_DMA_RING_COUNT (0x10000 / DMA_BUFFER_SIZE)
600 #define AO_DMA_RING_COUNT (0x10000 / DMA_BUFFER_SIZE)
601 static inline unsigned int ai_dma_ring_count(struct pcidas64_board *board)
602 {
603 if (board->layout == LAYOUT_4020)
604 return MAX_AI_DMA_RING_COUNT;
605 else
606 return MIN_AI_DMA_RING_COUNT;
607 }
608
609 static const int bytes_in_sample = 2;
610
611 static const struct pcidas64_board pcidas64_boards[] = {
612 {
613 .name = "pci-das6402/16",
614 .device_id = 0x1d,
615 .ai_se_chans = 64,
616 .ai_bits = 16,
617 .ai_speed = 5000,
618 .ao_nchan = 2,
619 .ao_bits = 16,
620 .ao_scan_speed = 10000,
621 .layout = LAYOUT_64XX,
622 .ai_range_table = &ai_ranges_64xx,
623 .ao_range_table = &ao_ranges_64xx,
624 .ao_range_code = ao_range_code_64xx,
625 .ai_fifo = &ai_fifo_64xx,
626 .has_8255 = 1,
627 },
628 {
629 .name = "pci-das6402/12", /* XXX check */
630 .device_id = 0x1e,
631 .ai_se_chans = 64,
632 .ai_bits = 12,
633 .ai_speed = 5000,
634 .ao_nchan = 2,
635 .ao_bits = 12,
636 .ao_scan_speed = 10000,
637 .layout = LAYOUT_64XX,
638 .ai_range_table = &ai_ranges_64xx,
639 .ao_range_table = &ao_ranges_64xx,
640 .ao_range_code = ao_range_code_64xx,
641 .ai_fifo = &ai_fifo_64xx,
642 .has_8255 = 1,
643 },
644 {
645 .name = "pci-das64/m1/16",
646 .device_id = 0x35,
647 .ai_se_chans = 64,
648 .ai_bits = 16,
649 .ai_speed = 1000,
650 .ao_nchan = 2,
651 .ao_bits = 16,
652 .ao_scan_speed = 10000,
653 .layout = LAYOUT_64XX,
654 .ai_range_table = &ai_ranges_64xx,
655 .ao_range_table = &ao_ranges_64xx,
656 .ao_range_code = ao_range_code_64xx,
657 .ai_fifo = &ai_fifo_64xx,
658 .has_8255 = 1,
659 },
660 {
661 .name = "pci-das64/m2/16",
662 .device_id = 0x36,
663 .ai_se_chans = 64,
664 .ai_bits = 16,
665 .ai_speed = 500,
666 .ao_nchan = 2,
667 .ao_bits = 16,
668 .ao_scan_speed = 10000,
669 .layout = LAYOUT_64XX,
670 .ai_range_table = &ai_ranges_64xx,
671 .ao_range_table = &ao_ranges_64xx,
672 .ao_range_code = ao_range_code_64xx,
673 .ai_fifo = &ai_fifo_64xx,
674 .has_8255 = 1,
675 },
676 {
677 .name = "pci-das64/m3/16",
678 .device_id = 0x37,
679 .ai_se_chans = 64,
680 .ai_bits = 16,
681 .ai_speed = 333,
682 .ao_nchan = 2,
683 .ao_bits = 16,
684 .ao_scan_speed = 10000,
685 .layout = LAYOUT_64XX,
686 .ai_range_table = &ai_ranges_64xx,
687 .ao_range_table = &ao_ranges_64xx,
688 .ao_range_code = ao_range_code_64xx,
689 .ai_fifo = &ai_fifo_64xx,
690 .has_8255 = 1,
691 },
692 {
693 .name = "pci-das6013",
694 .device_id = 0x78,
695 .ai_se_chans = 16,
696 .ai_bits = 16,
697 .ai_speed = 5000,
698 .ao_nchan = 0,
699 .ao_bits = 16,
700 .layout = LAYOUT_60XX,
701 .ai_range_table = &ai_ranges_60xx,
702 .ao_range_table = &ao_ranges_60xx,
703 .ao_range_code = ao_range_code_60xx,
704 .ai_fifo = &ai_fifo_60xx,
705 .has_8255 = 0,
706 },
707 {
708 .name = "pci-das6014",
709 .device_id = 0x79,
710 .ai_se_chans = 16,
711 .ai_bits = 16,
712 .ai_speed = 5000,
713 .ao_nchan = 2,
714 .ao_bits = 16,
715 .ao_scan_speed = 100000,
716 .layout = LAYOUT_60XX,
717 .ai_range_table = &ai_ranges_60xx,
718 .ao_range_table = &ao_ranges_60xx,
719 .ao_range_code = ao_range_code_60xx,
720 .ai_fifo = &ai_fifo_60xx,
721 .has_8255 = 0,
722 },
723 {
724 .name = "pci-das6023",
725 .device_id = 0x5d,
726 .ai_se_chans = 16,
727 .ai_bits = 12,
728 .ai_speed = 5000,
729 .ao_nchan = 0,
730 .ao_scan_speed = 100000,
731 .layout = LAYOUT_60XX,
732 .ai_range_table = &ai_ranges_60xx,
733 .ao_range_table = &ao_ranges_60xx,
734 .ao_range_code = ao_range_code_60xx,
735 .ai_fifo = &ai_fifo_60xx,
736 .has_8255 = 1,
737 },
738 {
739 .name = "pci-das6025",
740 .device_id = 0x5e,
741 .ai_se_chans = 16,
742 .ai_bits = 12,
743 .ai_speed = 5000,
744 .ao_nchan = 2,
745 .ao_bits = 12,
746 .ao_scan_speed = 100000,
747 .layout = LAYOUT_60XX,
748 .ai_range_table = &ai_ranges_60xx,
749 .ao_range_table = &ao_ranges_60xx,
750 .ao_range_code = ao_range_code_60xx,
751 .ai_fifo = &ai_fifo_60xx,
752 .has_8255 = 1,
753 },
754 {
755 .name = "pci-das6030",
756 .device_id = 0x5f,
757 .ai_se_chans = 16,
758 .ai_bits = 16,
759 .ai_speed = 10000,
760 .ao_nchan = 2,
761 .ao_bits = 16,
762 .ao_scan_speed = 10000,
763 .layout = LAYOUT_60XX,
764 .ai_range_table = &ai_ranges_6030,
765 .ao_range_table = &ao_ranges_6030,
766 .ao_range_code = ao_range_code_6030,
767 .ai_fifo = &ai_fifo_60xx,
768 .has_8255 = 0,
769 },
770 {
771 .name = "pci-das6031",
772 .device_id = 0x60,
773 .ai_se_chans = 64,
774 .ai_bits = 16,
775 .ai_speed = 10000,
776 .ao_nchan = 2,
777 .ao_bits = 16,
778 .ao_scan_speed = 10000,
779 .layout = LAYOUT_60XX,
780 .ai_range_table = &ai_ranges_6030,
781 .ao_range_table = &ao_ranges_6030,
782 .ao_range_code = ao_range_code_6030,
783 .ai_fifo = &ai_fifo_60xx,
784 .has_8255 = 0,
785 },
786 {
787 .name = "pci-das6032",
788 .device_id = 0x61,
789 .ai_se_chans = 16,
790 .ai_bits = 16,
791 .ai_speed = 10000,
792 .ao_nchan = 0,
793 .layout = LAYOUT_60XX,
794 .ai_range_table = &ai_ranges_6030,
795 .ai_fifo = &ai_fifo_60xx,
796 .has_8255 = 0,
797 },
798 {
799 .name = "pci-das6033",
800 .device_id = 0x62,
801 .ai_se_chans = 64,
802 .ai_bits = 16,
803 .ai_speed = 10000,
804 .ao_nchan = 0,
805 .layout = LAYOUT_60XX,
806 .ai_range_table = &ai_ranges_6030,
807 .ai_fifo = &ai_fifo_60xx,
808 .has_8255 = 0,
809 },
810 {
811 .name = "pci-das6034",
812 .device_id = 0x63,
813 .ai_se_chans = 16,
814 .ai_bits = 16,
815 .ai_speed = 5000,
816 .ao_nchan = 0,
817 .ao_scan_speed = 0,
818 .layout = LAYOUT_60XX,
819 .ai_range_table = &ai_ranges_60xx,
820 .ai_fifo = &ai_fifo_60xx,
821 .has_8255 = 0,
822 },
823 {
824 .name = "pci-das6035",
825 .device_id = 0x64,
826 .ai_se_chans = 16,
827 .ai_bits = 16,
828 .ai_speed = 5000,
829 .ao_nchan = 2,
830 .ao_bits = 12,
831 .ao_scan_speed = 100000,
832 .layout = LAYOUT_60XX,
833 .ai_range_table = &ai_ranges_60xx,
834 .ao_range_table = &ao_ranges_60xx,
835 .ao_range_code = ao_range_code_60xx,
836 .ai_fifo = &ai_fifo_60xx,
837 .has_8255 = 0,
838 },
839 {
840 .name = "pci-das6036",
841 .device_id = 0x6f,
842 .ai_se_chans = 16,
843 .ai_bits = 16,
844 .ai_speed = 5000,
845 .ao_nchan = 2,
846 .ao_bits = 16,
847 .ao_scan_speed = 100000,
848 .layout = LAYOUT_60XX,
849 .ai_range_table = &ai_ranges_60xx,
850 .ao_range_table = &ao_ranges_60xx,
851 .ao_range_code = ao_range_code_60xx,
852 .ai_fifo = &ai_fifo_60xx,
853 .has_8255 = 0,
854 },
855 {
856 .name = "pci-das6040",
857 .device_id = 0x65,
858 .ai_se_chans = 16,
859 .ai_bits = 12,
860 .ai_speed = 2000,
861 .ao_nchan = 2,
862 .ao_bits = 12,
863 .ao_scan_speed = 1000,
864 .layout = LAYOUT_60XX,
865 .ai_range_table = &ai_ranges_6052,
866 .ao_range_table = &ao_ranges_6030,
867 .ao_range_code = ao_range_code_6030,
868 .ai_fifo = &ai_fifo_60xx,
869 .has_8255 = 0,
870 },
871 {
872 .name = "pci-das6052",
873 .device_id = 0x66,
874 .ai_se_chans = 16,
875 .ai_bits = 16,
876 .ai_speed = 3333,
877 .ao_nchan = 2,
878 .ao_bits = 16,
879 .ao_scan_speed = 3333,
880 .layout = LAYOUT_60XX,
881 .ai_range_table = &ai_ranges_6052,
882 .ao_range_table = &ao_ranges_6030,
883 .ao_range_code = ao_range_code_6030,
884 .ai_fifo = &ai_fifo_60xx,
885 .has_8255 = 0,
886 },
887 {
888 .name = "pci-das6070",
889 .device_id = 0x67,
890 .ai_se_chans = 16,
891 .ai_bits = 12,
892 .ai_speed = 800,
893 .ao_nchan = 2,
894 .ao_bits = 12,
895 .ao_scan_speed = 1000,
896 .layout = LAYOUT_60XX,
897 .ai_range_table = &ai_ranges_6052,
898 .ao_range_table = &ao_ranges_6030,
899 .ao_range_code = ao_range_code_6030,
900 .ai_fifo = &ai_fifo_60xx,
901 .has_8255 = 0,
902 },
903 {
904 .name = "pci-das6071",
905 .device_id = 0x68,
906 .ai_se_chans = 64,
907 .ai_bits = 12,
908 .ai_speed = 800,
909 .ao_nchan = 2,
910 .ao_bits = 12,
911 .ao_scan_speed = 1000,
912 .layout = LAYOUT_60XX,
913 .ai_range_table = &ai_ranges_6052,
914 .ao_range_table = &ao_ranges_6030,
915 .ao_range_code = ao_range_code_6030,
916 .ai_fifo = &ai_fifo_60xx,
917 .has_8255 = 0,
918 },
919 {
920 .name = "pci-das4020/12",
921 .device_id = 0x52,
922 .ai_se_chans = 4,
923 .ai_bits = 12,
924 .ai_speed = 50,
925 .ao_bits = 12,
926 .ao_nchan = 2,
927 .ao_scan_speed = 0, /* no hardware pacing on ao */
928 .layout = LAYOUT_4020,
929 .ai_range_table = &ai_ranges_4020,
930 .ao_range_table = &ao_ranges_4020,
931 .ao_range_code = ao_range_code_4020,
932 .ai_fifo = &ai_fifo_4020,
933 .has_8255 = 1,
934 },
935 #if 0
936 {
937 .name = "pci-das6402/16/jr",
938 .device_id = 0 /* XXX, */
939 .ai_se_chans = 64,
940 .ai_bits = 16,
941 .ai_speed = 5000,
942 .ao_nchan = 0,
943 .ao_scan_speed = 10000,
944 .layout = LAYOUT_64XX,
945 .ai_range_table = &ai_ranges_64xx,
946 .ai_fifo = ai_fifo_64xx,
947 .has_8255 = 1,
948 },
949 {
950 .name = "pci-das64/m1/16/jr",
951 .device_id = 0 /* XXX, */
952 .ai_se_chans = 64,
953 .ai_bits = 16,
954 .ai_speed = 1000,
955 .ao_nchan = 0,
956 .ao_scan_speed = 10000,
957 .layout = LAYOUT_64XX,
958 .ai_range_table = &ai_ranges_64xx,
959 .ai_fifo = ai_fifo_64xx,
960 .has_8255 = 1,
961 },
962 {
963 .name = "pci-das64/m2/16/jr",
964 .device_id = 0 /* XXX, */
965 .ai_se_chans = 64,
966 .ai_bits = 16,
967 .ai_speed = 500,
968 .ao_nchan = 0,
969 .ao_scan_speed = 10000,
970 .layout = LAYOUT_64XX,
971 .ai_range_table = &ai_ranges_64xx,
972 .ai_fifo = ai_fifo_64xx,
973 .has_8255 = 1,
974 },
975 {
976 .name = "pci-das64/m3/16/jr",
977 .device_id = 0 /* XXX, */
978 .ai_se_chans = 64,
979 .ai_bits = 16,
980 .ai_speed = 333,
981 .ao_nchan = 0,
982 .ao_scan_speed = 10000,
983 .layout = LAYOUT_64XX,
984 .ai_range_table = &ai_ranges_64xx,
985 .ai_fifo = ai_fifo_64xx,
986 .has_8255 = 1,
987 },
988 {
989 .name = "pci-das64/m1/14",
990 .device_id = 0, /* XXX */
991 .ai_se_chans = 64,
992 .ai_bits = 14,
993 .ai_speed = 1000,
994 .ao_nchan = 2,
995 .ao_scan_speed = 10000,
996 .layout = LAYOUT_64XX,
997 .ai_range_table = &ai_ranges_64xx,
998 .ai_fifo = ai_fifo_64xx,
999 .has_8255 = 1,
1000 },
1001 {
1002 .name = "pci-das64/m2/14",
1003 .device_id = 0, /* XXX */
1004 .ai_se_chans = 64,
1005 .ai_bits = 14,
1006 .ai_speed = 500,
1007 .ao_nchan = 2,
1008 .ao_scan_speed = 10000,
1009 .layout = LAYOUT_64XX,
1010 .ai_range_table = &ai_ranges_64xx,
1011 .ai_fifo = ai_fifo_64xx,
1012 .has_8255 = 1,
1013 },
1014 {
1015 .name = "pci-das64/m3/14",
1016 .device_id = 0, /* XXX */
1017 .ai_se_chans = 64,
1018 .ai_bits = 14,
1019 .ai_speed = 333,
1020 .ao_nchan = 2,
1021 .ao_scan_speed = 10000,
1022 .layout = LAYOUT_64XX,
1023 .ai_range_table = &ai_ranges_64xx,
1024 .ai_fifo = ai_fifo_64xx,
1025 .has_8255 = 1,
1026 },
1027 #endif
1028 };
1029
1030 static DEFINE_PCI_DEVICE_TABLE(pcidas64_pci_table) = {
1031 {
1032 PCI_VENDOR_ID_COMPUTERBOARDS, 0x001d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1033 {
1034 PCI_VENDOR_ID_COMPUTERBOARDS, 0x001e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1035 {
1036 PCI_VENDOR_ID_COMPUTERBOARDS, 0x0035, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1037 {
1038 PCI_VENDOR_ID_COMPUTERBOARDS, 0x0036, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1039 {
1040 PCI_VENDOR_ID_COMPUTERBOARDS, 0x0037, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1041 {
1042 PCI_VENDOR_ID_COMPUTERBOARDS, 0x0052, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1043 {
1044 PCI_VENDOR_ID_COMPUTERBOARDS, 0x005d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1045 {
1046 PCI_VENDOR_ID_COMPUTERBOARDS, 0x005e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1047 {
1048 PCI_VENDOR_ID_COMPUTERBOARDS, 0x005f, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1049 {
1050 PCI_VENDOR_ID_COMPUTERBOARDS, 0x0061, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1051 {
1052 PCI_VENDOR_ID_COMPUTERBOARDS, 0x0062, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1053 {
1054 PCI_VENDOR_ID_COMPUTERBOARDS, 0x0063, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1055 {
1056 PCI_VENDOR_ID_COMPUTERBOARDS, 0x0064, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1057 {
1058 PCI_VENDOR_ID_COMPUTERBOARDS, 0x0066, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1059 {
1060 PCI_VENDOR_ID_COMPUTERBOARDS, 0x0067, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1061 {
1062 PCI_VENDOR_ID_COMPUTERBOARDS, 0x0068, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1063 {
1064 PCI_VENDOR_ID_COMPUTERBOARDS, 0x006f, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1065 {
1066 PCI_VENDOR_ID_COMPUTERBOARDS, 0x0078, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1067 {
1068 PCI_VENDOR_ID_COMPUTERBOARDS, 0x0079, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1069 {
1070 0}
1071 };
1072
1073 MODULE_DEVICE_TABLE(pci, pcidas64_pci_table);
1074
1075 static inline struct pcidas64_board *board(const struct comedi_device *dev)
1076 {
1077 return (struct pcidas64_board *)dev->board_ptr;
1078 }
1079
1080 static inline unsigned short se_diff_bit_6xxx(struct comedi_device *dev,
1081 int use_differential)
1082 {
1083 if ((board(dev)->layout == LAYOUT_64XX && !use_differential) ||
1084 (board(dev)->layout == LAYOUT_60XX && use_differential))
1085 return ADC_SE_DIFF_BIT;
1086 else
1087 return 0;
1088 };
1089
1090 struct ext_clock_info {
1091 unsigned int divisor; /* master clock divisor to use for scans with external master clock */
1092 unsigned int chanspec; /* chanspec for master clock input when used as scan begin src */
1093 };
1094
1095 /* this structure is for data unique to this hardware driver. */
1096 struct pcidas64_private {
1097
1098 struct pci_dev *hw_dev; /* pointer to board's pci_dev struct */
1099 /* base addresses (physical) */
1100 resource_size_t plx9080_phys_iobase;
1101 resource_size_t main_phys_iobase;
1102 resource_size_t dio_counter_phys_iobase;
1103 /* base addresses (ioremapped) */
1104 void __iomem *plx9080_iobase;
1105 void __iomem *main_iobase;
1106 void __iomem *dio_counter_iobase;
1107 /* local address (used by dma controller) */
1108 uint32_t local0_iobase;
1109 uint32_t local1_iobase;
1110 volatile unsigned int ai_count; /* number of analog input samples remaining */
1111 uint16_t *ai_buffer[MAX_AI_DMA_RING_COUNT]; /* dma buffers for analog input */
1112 dma_addr_t ai_buffer_bus_addr[MAX_AI_DMA_RING_COUNT]; /* physical addresses of ai dma buffers */
1113 struct plx_dma_desc *ai_dma_desc; /* array of ai dma descriptors read by plx9080, allocated to get proper alignment */
1114 dma_addr_t ai_dma_desc_bus_addr; /* physical address of ai dma descriptor array */
1115 volatile unsigned int ai_dma_index; /* index of the ai dma descriptor/buffer that is currently being used */
1116 uint16_t *ao_buffer[AO_DMA_RING_COUNT]; /* dma buffers for analog output */
1117 dma_addr_t ao_buffer_bus_addr[AO_DMA_RING_COUNT]; /* physical addresses of ao dma buffers */
1118 struct plx_dma_desc *ao_dma_desc;
1119 dma_addr_t ao_dma_desc_bus_addr;
1120 volatile unsigned int ao_dma_index; /* keeps track of buffer where the next ao sample should go */
1121 volatile unsigned long ao_count; /* number of analog output samples remaining */
1122 volatile unsigned int ao_value[2]; /* remember what the analog outputs are set to, to allow readback */
1123 unsigned int hw_revision; /* stc chip hardware revision number */
1124 volatile unsigned int intr_enable_bits; /* last bits sent to INTR_ENABLE_REG register */
1125 volatile uint16_t adc_control1_bits; /* last bits sent to ADC_CONTROL1_REG register */
1126 volatile uint16_t fifo_size_bits; /* last bits sent to FIFO_SIZE_REG register */
1127 volatile uint16_t hw_config_bits; /* last bits sent to HW_CONFIG_REG register */
1128 volatile uint16_t dac_control1_bits;
1129 volatile uint32_t plx_control_bits; /* last bits written to plx9080 control register */
1130 volatile uint32_t plx_intcsr_bits; /* last bits written to plx interrupt control and status register */
1131 volatile int calibration_source; /* index of calibration source readable through ai ch0 */
1132 volatile uint8_t i2c_cal_range_bits; /* bits written to i2c calibration/range register */
1133 volatile unsigned int ext_trig_falling; /* configure digital triggers to trigger on falling edge */
1134 /* states of various devices stored to enable read-back */
1135 unsigned int ad8402_state[2];
1136 unsigned int caldac_state[8];
1137 volatile short ai_cmd_running;
1138 unsigned int ai_fifo_segment_length;
1139 struct ext_clock_info ext_clock;
1140 short ao_bounce_buffer[DAC_FIFO_SIZE];
1141 };
1142
1143 /* inline function that makes it easier to
1144 * access the private structure.
1145 */
1146 static inline struct pcidas64_private *priv(struct comedi_device *dev)
1147 {
1148 return dev->private;
1149 }
1150
1151 /*
1152 * The comedi_driver structure tells the Comedi core module
1153 * which functions to call to configure/deconfigure (attach/detach)
1154 * the board, and also about the kernel module that contains
1155 * the device code.
1156 */
1157 static int attach(struct comedi_device *dev, struct comedi_devconfig *it);
1158 static int detach(struct comedi_device *dev);
1159 static struct comedi_driver driver_cb_pcidas = {
1160 .driver_name = "cb_pcidas64",
1161 .module = THIS_MODULE,
1162 .attach = attach,
1163 .detach = detach,
1164 };
1165
1166 static int ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
1167 struct comedi_insn *insn, unsigned int *data);
1168 static int ai_config_insn(struct comedi_device *dev, struct comedi_subdevice *s,
1169 struct comedi_insn *insn, unsigned int *data);
1170 static int ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
1171 struct comedi_insn *insn, unsigned int *data);
1172 static int ao_readback_insn(struct comedi_device *dev,
1173 struct comedi_subdevice *s,
1174 struct comedi_insn *insn, unsigned int *data);
1175 static int ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s);
1176 static int ai_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s,
1177 struct comedi_cmd *cmd);
1178 static int ao_cmd(struct comedi_device *dev, struct comedi_subdevice *s);
1179 static int ao_inttrig(struct comedi_device *dev,
1180 struct comedi_subdevice *subdev, unsigned int trig_num);
1181 static int ao_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s,
1182 struct comedi_cmd *cmd);
1183 static irqreturn_t handle_interrupt(int irq, void *d);
1184 static int ai_cancel(struct comedi_device *dev, struct comedi_subdevice *s);
1185 static int ao_cancel(struct comedi_device *dev, struct comedi_subdevice *s);
1186 static int dio_callback(int dir, int port, int data, unsigned long arg);
1187 static int dio_callback_4020(int dir, int port, int data, unsigned long arg);
1188 static int di_rbits(struct comedi_device *dev, struct comedi_subdevice *s,
1189 struct comedi_insn *insn, unsigned int *data);
1190 static int do_wbits(struct comedi_device *dev, struct comedi_subdevice *s,
1191 struct comedi_insn *insn, unsigned int *data);
1192 static int dio_60xx_config_insn(struct comedi_device *dev,
1193 struct comedi_subdevice *s,
1194 struct comedi_insn *insn, unsigned int *data);
1195 static int dio_60xx_wbits(struct comedi_device *dev, struct comedi_subdevice *s,
1196 struct comedi_insn *insn, unsigned int *data);
1197 static int calib_read_insn(struct comedi_device *dev,
1198 struct comedi_subdevice *s, struct comedi_insn *insn,
1199 unsigned int *data);
1200 static int calib_write_insn(struct comedi_device *dev,
1201 struct comedi_subdevice *s,
1202 struct comedi_insn *insn, unsigned int *data);
1203 static int ad8402_read_insn(struct comedi_device *dev,
1204 struct comedi_subdevice *s,
1205 struct comedi_insn *insn, unsigned int *data);
1206 static void ad8402_write(struct comedi_device *dev, unsigned int channel,
1207 unsigned int value);
1208 static int ad8402_write_insn(struct comedi_device *dev,
1209 struct comedi_subdevice *s,
1210 struct comedi_insn *insn, unsigned int *data);
1211 static int eeprom_read_insn(struct comedi_device *dev,
1212 struct comedi_subdevice *s,
1213 struct comedi_insn *insn, unsigned int *data);
1214 static void check_adc_timing(struct comedi_device *dev, struct comedi_cmd *cmd);
1215 static unsigned int get_divisor(unsigned int ns, unsigned int flags);
1216 static void i2c_write(struct comedi_device *dev, unsigned int address,
1217 const uint8_t * data, unsigned int length);
1218 static void caldac_write(struct comedi_device *dev, unsigned int channel,
1219 unsigned int value);
1220 static int caldac_8800_write(struct comedi_device *dev, unsigned int address,
1221 uint8_t value);
1222 /* static int dac_1590_write(struct comedi_device *dev, unsigned int dac_a, unsigned int dac_b); */
1223 static int caldac_i2c_write(struct comedi_device *dev,
1224 unsigned int caldac_channel, unsigned int value);
1225 static void abort_dma(struct comedi_device *dev, unsigned int channel);
1226 static void disable_plx_interrupts(struct comedi_device *dev);
1227 static int set_ai_fifo_size(struct comedi_device *dev,
1228 unsigned int num_samples);
1229 static unsigned int ai_fifo_size(struct comedi_device *dev);
1230 static int set_ai_fifo_segment_length(struct comedi_device *dev,
1231 unsigned int num_entries);
1232 static void disable_ai_pacing(struct comedi_device *dev);
1233 static void disable_ai_interrupts(struct comedi_device *dev);
1234 static void enable_ai_interrupts(struct comedi_device *dev,
1235 const struct comedi_cmd *cmd);
1236 static unsigned int get_ao_divisor(unsigned int ns, unsigned int flags);
1237 static void load_ao_dma(struct comedi_device *dev,
1238 const struct comedi_cmd *cmd);
1239
1240 COMEDI_PCI_INITCLEANUP(driver_cb_pcidas, pcidas64_pci_table);
1241
1242 static unsigned int ai_range_bits_6xxx(const struct comedi_device *dev,
1243 unsigned int range_index)
1244 {
1245 const struct comedi_krange *range =
1246 &board(dev)->ai_range_table->range[range_index];
1247 unsigned int bits = 0;
1248
1249 switch (range->max) {
1250 case 10000000:
1251 bits = 0x000;
1252 break;
1253 case 5000000:
1254 bits = 0x100;
1255 break;
1256 case 2000000:
1257 case 2500000:
1258 bits = 0x200;
1259 break;
1260 case 1000000:
1261 case 1250000:
1262 bits = 0x300;
1263 break;
1264 case 500000:
1265 bits = 0x400;
1266 break;
1267 case 200000:
1268 case 250000:
1269 bits = 0x500;
1270 break;
1271 case 100000:
1272 bits = 0x600;
1273 break;
1274 case 50000:
1275 bits = 0x700;
1276 break;
1277 default:
1278 comedi_error(dev, "bug! in ai_range_bits_6xxx");
1279 break;
1280 }
1281 if (range->min == 0)
1282 bits += 0x900;
1283 return bits;
1284 }
1285
1286 static unsigned int hw_revision(const struct comedi_device *dev,
1287 uint16_t hw_status_bits)
1288 {
1289 if (board(dev)->layout == LAYOUT_4020)
1290 return (hw_status_bits >> 13) & 0x7;
1291
1292 return (hw_status_bits >> 12) & 0xf;
1293 }
1294
1295 static void set_dac_range_bits(struct comedi_device *dev,
1296 volatile uint16_t * bits, unsigned int channel,
1297 unsigned int range)
1298 {
1299 unsigned int code = board(dev)->ao_range_code[range];
1300
1301 if (channel > 1)
1302 comedi_error(dev, "bug! bad channel?");
1303 if (code & ~0x3)
1304 comedi_error(dev, "bug! bad range code?");
1305
1306 *bits &= ~(0x3 << (2 * channel));
1307 *bits |= code << (2 * channel);
1308 };
1309
1310 static inline int ao_cmd_is_supported(const struct pcidas64_board *board)
1311 {
1312 return board->ao_nchan && board->layout != LAYOUT_4020;
1313 }
1314
1315 /* initialize plx9080 chip */
1316 static void init_plx9080(struct comedi_device *dev)
1317 {
1318 uint32_t bits;
1319 void __iomem *plx_iobase = priv(dev)->plx9080_iobase;
1320
1321 priv(dev)->plx_control_bits =
1322 readl(priv(dev)->plx9080_iobase + PLX_CONTROL_REG);
1323
1324 /* plx9080 dump */
1325 DEBUG_PRINT(" plx interrupt status 0x%x\n",
1326 readl(plx_iobase + PLX_INTRCS_REG));
1327 DEBUG_PRINT(" plx id bits 0x%x\n", readl(plx_iobase + PLX_ID_REG));
1328 DEBUG_PRINT(" plx control reg 0x%x\n", priv(dev)->plx_control_bits);
1329 DEBUG_PRINT(" plx mode/arbitration reg 0x%x\n",
1330 readl(plx_iobase + PLX_MARB_REG));
1331 DEBUG_PRINT(" plx region0 reg 0x%x\n",
1332 readl(plx_iobase + PLX_REGION0_REG));
1333 DEBUG_PRINT(" plx region1 reg 0x%x\n",
1334 readl(plx_iobase + PLX_REGION1_REG));
1335
1336 DEBUG_PRINT(" plx revision 0x%x\n",
1337 readl(plx_iobase + PLX_REVISION_REG));
1338 DEBUG_PRINT(" plx dma channel 0 mode 0x%x\n",
1339 readl(plx_iobase + PLX_DMA0_MODE_REG));
1340 DEBUG_PRINT(" plx dma channel 1 mode 0x%x\n",
1341 readl(plx_iobase + PLX_DMA1_MODE_REG));
1342 DEBUG_PRINT(" plx dma channel 0 pci address 0x%x\n",
1343 readl(plx_iobase + PLX_DMA0_PCI_ADDRESS_REG));
1344 DEBUG_PRINT(" plx dma channel 0 local address 0x%x\n",
1345 readl(plx_iobase + PLX_DMA0_LOCAL_ADDRESS_REG));
1346 DEBUG_PRINT(" plx dma channel 0 transfer size 0x%x\n",
1347 readl(plx_iobase + PLX_DMA0_TRANSFER_SIZE_REG));
1348 DEBUG_PRINT(" plx dma channel 0 descriptor 0x%x\n",
1349 readl(plx_iobase + PLX_DMA0_DESCRIPTOR_REG));
1350 DEBUG_PRINT(" plx dma channel 0 command status 0x%x\n",
1351 readb(plx_iobase + PLX_DMA0_CS_REG));
1352 DEBUG_PRINT(" plx dma channel 0 threshold 0x%x\n",
1353 readl(plx_iobase + PLX_DMA0_THRESHOLD_REG));
1354 DEBUG_PRINT(" plx bigend 0x%x\n", readl(plx_iobase + PLX_BIGEND_REG));
1355
1356 #ifdef __BIG_ENDIAN
1357 bits = BIGEND_DMA0 | BIGEND_DMA1;
1358 #else
1359 bits = 0;
1360 #endif
1361 writel(bits, priv(dev)->plx9080_iobase + PLX_BIGEND_REG);
1362
1363 disable_plx_interrupts(dev);
1364
1365 abort_dma(dev, 0);
1366 abort_dma(dev, 1);
1367
1368 /* configure dma0 mode */
1369 bits = 0;
1370 /* enable ready input, not sure if this is necessary */
1371 bits |= PLX_DMA_EN_READYIN_BIT;
1372 /* enable bterm, not sure if this is necessary */
1373 bits |= PLX_EN_BTERM_BIT;
1374 /* enable dma chaining */
1375 bits |= PLX_EN_CHAIN_BIT;
1376 /* enable interrupt on dma done (probably don't need this, since chain never finishes) */
1377 bits |= PLX_EN_DMA_DONE_INTR_BIT;
1378 /* don't increment local address during transfers (we are transferring from a fixed fifo register) */
1379 bits |= PLX_LOCAL_ADDR_CONST_BIT;
1380 /* route dma interrupt to pci bus */
1381 bits |= PLX_DMA_INTR_PCI_BIT;
1382 /* enable demand mode */
1383 bits |= PLX_DEMAND_MODE_BIT;
1384 /* enable local burst mode */
1385 bits |= PLX_DMA_LOCAL_BURST_EN_BIT;
1386 /* 4020 uses 32 bit dma */
1387 if (board(dev)->layout == LAYOUT_4020) {
1388 bits |= PLX_LOCAL_BUS_32_WIDE_BITS;
1389 } else { /* localspace0 bus is 16 bits wide */
1390 bits |= PLX_LOCAL_BUS_16_WIDE_BITS;
1391 }
1392 writel(bits, plx_iobase + PLX_DMA1_MODE_REG);
1393 if (ao_cmd_is_supported(board(dev)))
1394 writel(bits, plx_iobase + PLX_DMA0_MODE_REG);
1395
1396 /* enable interrupts on plx 9080 */
1397 priv(dev)->plx_intcsr_bits |=
1398 ICS_AERR | ICS_PERR | ICS_PIE | ICS_PLIE | ICS_PAIE | ICS_LIE |
1399 ICS_DMA0_E | ICS_DMA1_E;
1400 writel(priv(dev)->plx_intcsr_bits,
1401 priv(dev)->plx9080_iobase + PLX_INTRCS_REG);
1402 }
1403
1404 /* Allocate and initialize the subdevice structures.
1405 */
1406 static int setup_subdevices(struct comedi_device *dev)
1407 {
1408 struct comedi_subdevice *s;
1409 void __iomem *dio_8255_iobase;
1410 int i;
1411
1412 if (alloc_subdevices(dev, 10) < 0)
1413 return -ENOMEM;
1414
1415 s = dev->subdevices + 0;
1416 /* analog input subdevice */
1417 dev->read_subdev = s;
1418 s->type = COMEDI_SUBD_AI;
1419 s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DITHER | SDF_CMD_READ;
1420 if (board(dev)->layout == LAYOUT_60XX)
1421 s->subdev_flags |= SDF_COMMON | SDF_DIFF;
1422 else if (board(dev)->layout == LAYOUT_64XX)
1423 s->subdev_flags |= SDF_DIFF;
1424 /* XXX Number of inputs in differential mode is ignored */
1425 s->n_chan = board(dev)->ai_se_chans;
1426 s->len_chanlist = 0x2000;
1427 s->maxdata = (1 << board(dev)->ai_bits) - 1;
1428 s->range_table = board(dev)->ai_range_table;
1429 s->insn_read = ai_rinsn;
1430 s->insn_config = ai_config_insn;
1431 s->do_cmd = ai_cmd;
1432 s->do_cmdtest = ai_cmdtest;
1433 s->cancel = ai_cancel;
1434 if (board(dev)->layout == LAYOUT_4020) {
1435 uint8_t data;
1436 /* set adc to read from inputs (not internal calibration sources) */
1437 priv(dev)->i2c_cal_range_bits = adc_src_4020_bits(4);
1438 /* set channels to +-5 volt input ranges */
1439 for (i = 0; i < s->n_chan; i++)
1440 priv(dev)->i2c_cal_range_bits |= attenuate_bit(i);
1441 data = priv(dev)->i2c_cal_range_bits;
1442 i2c_write(dev, RANGE_CAL_I2C_ADDR, &data, sizeof(data));
1443 }
1444
1445 /* analog output subdevice */
1446 s = dev->subdevices + 1;
1447 if (board(dev)->ao_nchan) {
1448 s->type = COMEDI_SUBD_AO;
1449 s->subdev_flags =
1450 SDF_READABLE | SDF_WRITABLE | SDF_GROUND | SDF_CMD_WRITE;
1451 s->n_chan = board(dev)->ao_nchan;
1452 s->maxdata = (1 << board(dev)->ao_bits) - 1;
1453 s->range_table = board(dev)->ao_range_table;
1454 s->insn_read = ao_readback_insn;
1455 s->insn_write = ao_winsn;
1456 if (ao_cmd_is_supported(board(dev))) {
1457 dev->write_subdev = s;
1458 s->do_cmdtest = ao_cmdtest;
1459 s->do_cmd = ao_cmd;
1460 s->len_chanlist = board(dev)->ao_nchan;
1461 s->cancel = ao_cancel;
1462 }
1463 } else {
1464 s->type = COMEDI_SUBD_UNUSED;
1465 }
1466
1467 /* digital input */
1468 s = dev->subdevices + 2;
1469 if (board(dev)->layout == LAYOUT_64XX) {
1470 s->type = COMEDI_SUBD_DI;
1471 s->subdev_flags = SDF_READABLE;
1472 s->n_chan = 4;
1473 s->maxdata = 1;
1474 s->range_table = &range_digital;
1475 s->insn_bits = di_rbits;
1476 } else
1477 s->type = COMEDI_SUBD_UNUSED;
1478
1479 /* digital output */
1480 if (board(dev)->layout == LAYOUT_64XX) {
1481 s = dev->subdevices + 3;
1482 s->type = COMEDI_SUBD_DO;
1483 s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
1484 s->n_chan = 4;
1485 s->maxdata = 1;
1486 s->range_table = &range_digital;
1487 s->insn_bits = do_wbits;
1488 } else
1489 s->type = COMEDI_SUBD_UNUSED;
1490
1491 /* 8255 */
1492 s = dev->subdevices + 4;
1493 if (board(dev)->has_8255) {
1494 if (board(dev)->layout == LAYOUT_4020) {
1495 dio_8255_iobase =
1496 priv(dev)->main_iobase + I8255_4020_REG;
1497 subdev_8255_init(dev, s, dio_callback_4020,
1498 (unsigned long)dio_8255_iobase);
1499 } else {
1500 dio_8255_iobase =
1501 priv(dev)->dio_counter_iobase + DIO_8255_OFFSET;
1502 subdev_8255_init(dev, s, dio_callback,
1503 (unsigned long)dio_8255_iobase);
1504 }
1505 } else
1506 s->type = COMEDI_SUBD_UNUSED;
1507
1508 /* 8 channel dio for 60xx */
1509 s = dev->subdevices + 5;
1510 if (board(dev)->layout == LAYOUT_60XX) {
1511 s->type = COMEDI_SUBD_DIO;
1512 s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
1513 s->n_chan = 8;
1514 s->maxdata = 1;
1515 s->range_table = &range_digital;
1516 s->insn_config = dio_60xx_config_insn;
1517 s->insn_bits = dio_60xx_wbits;
1518 } else
1519 s->type = COMEDI_SUBD_UNUSED;
1520
1521 /* caldac */
1522 s = dev->subdevices + 6;
1523 s->type = COMEDI_SUBD_CALIB;
1524 s->subdev_flags = SDF_READABLE | SDF_WRITABLE | SDF_INTERNAL;
1525 s->n_chan = 8;
1526 if (board(dev)->layout == LAYOUT_4020)
1527 s->maxdata = 0xfff;
1528 else
1529 s->maxdata = 0xff;
1530 s->insn_read = calib_read_insn;
1531 s->insn_write = calib_write_insn;
1532 for (i = 0; i < s->n_chan; i++)
1533 caldac_write(dev, i, s->maxdata / 2);
1534
1535 /* 2 channel ad8402 potentiometer */
1536 s = dev->subdevices + 7;
1537 if (board(dev)->layout == LAYOUT_64XX) {
1538 s->type = COMEDI_SUBD_CALIB;
1539 s->subdev_flags = SDF_READABLE | SDF_WRITABLE | SDF_INTERNAL;
1540 s->n_chan = 2;
1541 s->insn_read = ad8402_read_insn;
1542 s->insn_write = ad8402_write_insn;
1543 s->maxdata = 0xff;
1544 for (i = 0; i < s->n_chan; i++)
1545 ad8402_write(dev, i, s->maxdata / 2);
1546 } else
1547 s->type = COMEDI_SUBD_UNUSED;
1548
1549 /* serial EEPROM, if present */
1550 s = dev->subdevices + 8;
1551 if (readl(priv(dev)->plx9080_iobase + PLX_CONTROL_REG) & CTL_EECHK) {
1552 s->type = COMEDI_SUBD_MEMORY;
1553 s->subdev_flags = SDF_READABLE | SDF_INTERNAL;
1554 s->n_chan = 128;
1555 s->maxdata = 0xffff;
1556 s->insn_read = eeprom_read_insn;
1557 } else
1558 s->type = COMEDI_SUBD_UNUSED;
1559
1560 /* user counter subd XXX */
1561 s = dev->subdevices + 9;
1562 s->type = COMEDI_SUBD_UNUSED;
1563
1564 return 0;
1565 }
1566
1567 static void disable_plx_interrupts(struct comedi_device *dev)
1568 {
1569 priv(dev)->plx_intcsr_bits = 0;
1570 writel(priv(dev)->plx_intcsr_bits,
1571 priv(dev)->plx9080_iobase + PLX_INTRCS_REG);
1572 }
1573
1574 static void init_stc_registers(struct comedi_device *dev)
1575 {
1576 uint16_t bits;
1577 unsigned long flags;
1578
1579 spin_lock_irqsave(&dev->spinlock, flags);
1580
1581 /* bit should be set for 6025, although docs say boards with <= 16 chans should be cleared XXX */
1582 if (1)
1583 priv(dev)->adc_control1_bits |= ADC_QUEUE_CONFIG_BIT;
1584 writew(priv(dev)->adc_control1_bits,
1585 priv(dev)->main_iobase + ADC_CONTROL1_REG);
1586
1587 /* 6402/16 manual says this register must be initialized to 0xff? */
1588 writew(0xff, priv(dev)->main_iobase + ADC_SAMPLE_INTERVAL_UPPER_REG);
1589
1590 bits = SLOW_DAC_BIT | DMA_CH_SELECT_BIT;
1591 if (board(dev)->layout == LAYOUT_4020)
1592 bits |= INTERNAL_CLOCK_4020_BITS;
1593 priv(dev)->hw_config_bits |= bits;
1594 writew(priv(dev)->hw_config_bits,
1595 priv(dev)->main_iobase + HW_CONFIG_REG);
1596
1597 writew(0, priv(dev)->main_iobase + DAQ_SYNC_REG);
1598 writew(0, priv(dev)->main_iobase + CALIBRATION_REG);
1599
1600 spin_unlock_irqrestore(&dev->spinlock, flags);
1601
1602 /* set fifos to maximum size */
1603 priv(dev)->fifo_size_bits |= DAC_FIFO_BITS;
1604 set_ai_fifo_segment_length(dev,
1605 board(dev)->ai_fifo->max_segment_length);
1606
1607 priv(dev)->dac_control1_bits = DAC_OUTPUT_ENABLE_BIT;
1608 priv(dev)->intr_enable_bits = /* EN_DAC_INTR_SRC_BIT | DAC_INTR_QEMPTY_BITS | */
1609 EN_DAC_DONE_INTR_BIT | EN_DAC_UNDERRUN_BIT;
1610 writew(priv(dev)->intr_enable_bits,
1611 priv(dev)->main_iobase + INTR_ENABLE_REG);
1612
1613 disable_ai_pacing(dev);
1614 };
1615
1616 static int alloc_and_init_dma_members(struct comedi_device *dev)
1617 {
1618 int i;
1619
1620 /* alocate pci dma buffers */
1621 for (i = 0; i < ai_dma_ring_count(board(dev)); i++) {
1622 priv(dev)->ai_buffer[i] =
1623 pci_alloc_consistent(priv(dev)->hw_dev, DMA_BUFFER_SIZE,
1624 &priv(dev)->ai_buffer_bus_addr[i]);
1625 if (priv(dev)->ai_buffer[i] == NULL)
1626 return -ENOMEM;
1627
1628 }
1629 for (i = 0; i < AO_DMA_RING_COUNT; i++) {
1630 if (ao_cmd_is_supported(board(dev))) {
1631 priv(dev)->ao_buffer[i] =
1632 pci_alloc_consistent(priv(dev)->hw_dev,
1633 DMA_BUFFER_SIZE,
1634 &priv(dev)->
1635 ao_buffer_bus_addr[i]);
1636 if (priv(dev)->ao_buffer[i] == NULL)
1637 return -ENOMEM;
1638
1639 }
1640 }
1641 /* allocate dma descriptors */
1642 priv(dev)->ai_dma_desc =
1643 pci_alloc_consistent(priv(dev)->hw_dev,
1644 sizeof(struct plx_dma_desc) *
1645 ai_dma_ring_count(board(dev)),
1646 &priv(dev)->ai_dma_desc_bus_addr);
1647 if (priv(dev)->ai_dma_desc == NULL)
1648 return -ENOMEM;
1649
1650 DEBUG_PRINT("ai dma descriptors start at bus addr 0x%x\n",
1651 priv(dev)->ai_dma_desc_bus_addr);
1652 if (ao_cmd_is_supported(board(dev))) {
1653 priv(dev)->ao_dma_desc =
1654 pci_alloc_consistent(priv(dev)->hw_dev,
1655 sizeof(struct plx_dma_desc) *
1656 AO_DMA_RING_COUNT,
1657 &priv(dev)->ao_dma_desc_bus_addr);
1658 if (priv(dev)->ao_dma_desc == NULL)
1659 return -ENOMEM;
1660
1661 DEBUG_PRINT("ao dma descriptors start at bus addr 0x%x\n",
1662 priv(dev)->ao_dma_desc_bus_addr);
1663 }
1664 /* initialize dma descriptors */
1665 for (i = 0; i < ai_dma_ring_count(board(dev)); i++) {
1666 priv(dev)->ai_dma_desc[i].pci_start_addr =
1667 cpu_to_le32(priv(dev)->ai_buffer_bus_addr[i]);
1668 if (board(dev)->layout == LAYOUT_4020)
1669 priv(dev)->ai_dma_desc[i].local_start_addr =
1670 cpu_to_le32(priv(dev)->local1_iobase +
1671 ADC_FIFO_REG);
1672 else
1673 priv(dev)->ai_dma_desc[i].local_start_addr =
1674 cpu_to_le32(priv(dev)->local0_iobase +
1675 ADC_FIFO_REG);
1676 priv(dev)->ai_dma_desc[i].transfer_size = cpu_to_le32(0);
1677 priv(dev)->ai_dma_desc[i].next =
1678 cpu_to_le32((priv(dev)->ai_dma_desc_bus_addr + ((i +
1679 1) %
1680 ai_dma_ring_count
1681 (board
1682 (dev))) *
1683 sizeof(priv(dev)->ai_dma_desc[0])) |
1684 PLX_DESC_IN_PCI_BIT | PLX_INTR_TERM_COUNT |
1685 PLX_XFER_LOCAL_TO_PCI);
1686 }
1687 if (ao_cmd_is_supported(board(dev))) {
1688 for (i = 0; i < AO_DMA_RING_COUNT; i++) {
1689 priv(dev)->ao_dma_desc[i].pci_start_addr =
1690 cpu_to_le32(priv(dev)->ao_buffer_bus_addr[i]);
1691 priv(dev)->ao_dma_desc[i].local_start_addr =
1692 cpu_to_le32(priv(dev)->local0_iobase +
1693 DAC_FIFO_REG);
1694 priv(dev)->ao_dma_desc[i].transfer_size =
1695 cpu_to_le32(0);
1696 priv(dev)->ao_dma_desc[i].next =
1697 cpu_to_le32((priv(dev)->ao_dma_desc_bus_addr +
1698 ((i + 1) % (AO_DMA_RING_COUNT)) *
1699 sizeof(priv(dev)->ao_dma_desc[0])) |
1700 PLX_DESC_IN_PCI_BIT |
1701 PLX_INTR_TERM_COUNT);
1702 }
1703 }
1704 return 0;
1705 }
1706
1707 static inline void warn_external_queue(struct comedi_device *dev)
1708 {
1709 comedi_error(dev,
1710 "AO command and AI external channel queue cannot be used simultaneously.");
1711 comedi_error(dev,
1712 "Use internal AI channel queue (channels must be consecutive and use same range/aref)");
1713 }
1714
1715 /*
1716 * Attach is called by the Comedi core to configure the driver
1717 * for a particular board.
1718 */
1719 static int attach(struct comedi_device *dev, struct comedi_devconfig *it)
1720 {
1721 struct pci_dev *pcidev;
1722 int index;
1723 uint32_t local_range, local_decode;
1724 int retval;
1725
1726 printk("comedi%d: cb_pcidas64\n", dev->minor);
1727
1728 /*
1729 * Allocate the private structure area.
1730 */
1731 if (alloc_private(dev, sizeof(struct pcidas64_private)) < 0)
1732 return -ENOMEM;
1733
1734 /*
1735 * Probe the device to determine what device in the series it is.
1736 */
1737
1738 for (pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL);
1739 pcidev != NULL;
1740 pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pcidev)) {
1741 /* is it not a computer boards card? */
1742 if (pcidev->vendor != PCI_VENDOR_ID_COMPUTERBOARDS)
1743 continue;
1744 /* loop through cards supported by this driver */
1745 for (index = 0; index < ARRAY_SIZE(pcidas64_boards); index++) {
1746 if (pcidas64_boards[index].device_id != pcidev->device)
1747 continue;
1748 /* was a particular bus/slot requested? */
1749 if (it->options[0] || it->options[1]) {
1750 /* are we on the wrong bus/slot? */
1751 if (pcidev->bus->number != it->options[0] ||
1752 PCI_SLOT(pcidev->devfn) != it->options[1]) {
1753 continue;
1754 }
1755 }
1756 priv(dev)->hw_dev = pcidev;
1757 dev->board_ptr = pcidas64_boards + index;
1758 break;
1759 }
1760 if (dev->board_ptr)
1761 break;
1762 }
1763
1764 if (dev->board_ptr == NULL) {
1765 printk
1766 ("No supported ComputerBoards/MeasurementComputing card found\n");
1767 return -EIO;
1768 }
1769
1770 printk("Found %s on bus %i, slot %i\n", board(dev)->name,
1771 pcidev->bus->number, PCI_SLOT(pcidev->devfn));
1772
1773 if (comedi_pci_enable(pcidev, driver_cb_pcidas.driver_name)) {
1774 printk(KERN_WARNING
1775 " failed to enable PCI device and request regions\n");
1776 return -EIO;
1777 }
1778 pci_set_master(pcidev);
1779
1780 /* Initialize dev->board_name */
1781 dev->board_name = board(dev)->name;
1782
1783 priv(dev)->plx9080_phys_iobase =
1784 pci_resource_start(pcidev, PLX9080_BADDRINDEX);
1785 priv(dev)->main_phys_iobase =
1786 pci_resource_start(pcidev, MAIN_BADDRINDEX);
1787 priv(dev)->dio_counter_phys_iobase =
1788 pci_resource_start(pcidev, DIO_COUNTER_BADDRINDEX);
1789
1790 /* remap, won't work with 2.0 kernels but who cares */
1791 priv(dev)->plx9080_iobase = ioremap(priv(dev)->plx9080_phys_iobase,
1792 pci_resource_len(pcidev,
1793 PLX9080_BADDRINDEX));
1794 priv(dev)->main_iobase =
1795 ioremap(priv(dev)->main_phys_iobase,
1796 pci_resource_len(pcidev, MAIN_BADDRINDEX));
1797 priv(dev)->dio_counter_iobase =
1798 ioremap(priv(dev)->dio_counter_phys_iobase,
1799 pci_resource_len(pcidev, DIO_COUNTER_BADDRINDEX));
1800
1801 if (!priv(dev)->plx9080_iobase || !priv(dev)->main_iobase
1802 || !priv(dev)->dio_counter_iobase) {
1803 printk(" failed to remap io memory\n");
1804 return -ENOMEM;
1805 }
1806
1807 DEBUG_PRINT(" plx9080 remapped to 0x%p\n", priv(dev)->plx9080_iobase);
1808 DEBUG_PRINT(" main remapped to 0x%p\n", priv(dev)->main_iobase);
1809 DEBUG_PRINT(" diocounter remapped to 0x%p\n",
1810 priv(dev)->dio_counter_iobase);
1811
1812 /* figure out what local addresses are */
1813 local_range =
1814 readl(priv(dev)->plx9080_iobase + PLX_LAS0RNG_REG) & LRNG_MEM_MASK;
1815 local_decode =
1816 readl(priv(dev)->plx9080_iobase +
1817 PLX_LAS0MAP_REG) & local_range & LMAP_MEM_MASK;
1818 priv(dev)->local0_iobase =
1819 ((uint32_t) priv(dev)->main_phys_iobase & ~local_range) |
1820 local_decode;
1821 local_range =
1822 readl(priv(dev)->plx9080_iobase + PLX_LAS1RNG_REG) & LRNG_MEM_MASK;
1823 local_decode =
1824 readl(priv(dev)->plx9080_iobase +
1825 PLX_LAS1MAP_REG) & local_range & LMAP_MEM_MASK;
1826 priv(dev)->local1_iobase =
1827 ((uint32_t) priv(dev)->dio_counter_phys_iobase & ~local_range) |
1828 local_decode;
1829
1830 DEBUG_PRINT(" local 0 io addr 0x%x\n", priv(dev)->local0_iobase);
1831 DEBUG_PRINT(" local 1 io addr 0x%x\n", priv(dev)->local1_iobase);
1832
1833 retval = alloc_and_init_dma_members(dev);
1834 if (retval < 0)
1835 return retval;
1836
1837 priv(dev)->hw_revision =
1838 hw_revision(dev, readw(priv(dev)->main_iobase + HW_STATUS_REG));
1839 printk(" stc hardware revision %i\n", priv(dev)->hw_revision);
1840 init_plx9080(dev);
1841 init_stc_registers(dev);
1842 /* get irq */
1843 if (request_irq(pcidev->irq, handle_interrupt, IRQF_SHARED,
1844 "cb_pcidas64", dev)) {
1845 printk(" unable to allocate irq %u\n", pcidev->irq);
1846 return -EINVAL;
1847 }
1848 dev->irq = pcidev->irq;
1849 printk(" irq %u\n", dev->irq);
1850
1851 retval = setup_subdevices(dev);
1852 if (retval < 0)
1853 return retval;
1854
1855
1856 return 0;
1857 }
1858
1859 /*
1860 * _detach is called to deconfigure a device. It should deallocate
1861 * resources.
1862 * This function is also called when _attach() fails, so it should be
1863 * careful not to release resources that were not necessarily
1864 * allocated by _attach(). dev->private and dev->subdevices are
1865 * deallocated automatically by the core.
1866 */
1867 static int detach(struct comedi_device *dev)
1868 {
1869 unsigned int i;
1870
1871 printk("comedi%d: cb_pcidas: remove\n", dev->minor);
1872
1873 if (dev->irq)
1874 free_irq(dev->irq, dev);
1875 if (priv(dev)) {
1876 if (priv(dev)->hw_dev) {
1877 if (priv(dev)->plx9080_iobase) {
1878 disable_plx_interrupts(dev);
1879 iounmap(priv(dev)->plx9080_iobase);
1880 }
1881 if (priv(dev)->main_iobase)
1882 iounmap(priv(dev)->main_iobase);
1883 if (priv(dev)->dio_counter_iobase)
1884 iounmap(priv(dev)->dio_counter_iobase);
1885 /* free pci dma buffers */
1886 for (i = 0; i < ai_dma_ring_count(board(dev)); i++) {
1887 if (priv(dev)->ai_buffer[i])
1888 pci_free_consistent(priv(dev)->hw_dev,
1889 DMA_BUFFER_SIZE,
1890 priv(dev)->
1891 ai_buffer[i],
1892 priv
1893 (dev)->ai_buffer_bus_addr
1894 [i]);
1895 }
1896 for (i = 0; i < AO_DMA_RING_COUNT; i++) {
1897 if (priv(dev)->ao_buffer[i])
1898 pci_free_consistent(priv(dev)->hw_dev,
1899 DMA_BUFFER_SIZE,
1900 priv(dev)->
1901 ao_buffer[i],
1902 priv
1903 (dev)->ao_buffer_bus_addr
1904 [i]);
1905 }
1906 /* free dma descriptors */
1907 if (priv(dev)->ai_dma_desc)
1908 pci_free_consistent(priv(dev)->hw_dev,
1909 sizeof(struct plx_dma_desc)
1910 *
1911 ai_dma_ring_count(board
1912 (dev)),
1913 priv(dev)->ai_dma_desc,
1914 priv(dev)->
1915 ai_dma_desc_bus_addr);
1916 if (priv(dev)->ao_dma_desc)
1917 pci_free_consistent(priv(dev)->hw_dev,
1918 sizeof(struct plx_dma_desc)
1919 * AO_DMA_RING_COUNT,
1920 priv(dev)->ao_dma_desc,
1921 priv(dev)->
1922 ao_dma_desc_bus_addr);
1923 if (priv(dev)->main_phys_iobase)
1924 comedi_pci_disable(priv(dev)->hw_dev);
1925
1926 pci_dev_put(priv(dev)->hw_dev);
1927 }
1928 }
1929 if (dev->subdevices)
1930 subdev_8255_cleanup(dev, dev->subdevices + 4);
1931
1932 return 0;
1933 }
1934
1935 static int ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
1936 struct comedi_insn *insn, unsigned int *data)
1937 {
1938 unsigned int bits = 0, n, i;
1939 unsigned int channel, range, aref;
1940 unsigned long flags;
1941 static const int timeout = 100;
1942
1943 DEBUG_PRINT("chanspec 0x%x\n", insn->chanspec);
1944 channel = CR_CHAN(insn->chanspec);
1945 range = CR_RANGE(insn->chanspec);
1946 aref = CR_AREF(insn->chanspec);
1947
1948 /* disable card's analog input interrupt sources and pacing */
1949 /* 4020 generates dac done interrupts even though they are disabled */
1950 disable_ai_pacing(dev);
1951
1952 spin_lock_irqsave(&dev->spinlock, flags);
1953 if (insn->chanspec & CR_ALT_FILTER)
1954 priv(dev)->adc_control1_bits |= ADC_DITHER_BIT;
1955 else
1956 priv(dev)->adc_control1_bits &= ~ADC_DITHER_BIT;
1957 writew(priv(dev)->adc_control1_bits,
1958 priv(dev)->main_iobase + ADC_CONTROL1_REG);
1959 spin_unlock_irqrestore(&dev->spinlock, flags);
1960
1961 if (board(dev)->layout != LAYOUT_4020) {
1962 /* use internal queue */
1963 priv(dev)->hw_config_bits &= ~EXT_QUEUE_BIT;
1964 writew(priv(dev)->hw_config_bits,
1965 priv(dev)->main_iobase + HW_CONFIG_REG);
1966
1967 /* ALT_SOURCE is internal calibration reference */
1968 if (insn->chanspec & CR_ALT_SOURCE) {
1969 unsigned int cal_en_bit;
1970
1971 DEBUG_PRINT("reading calibration source\n");
1972 if (board(dev)->layout == LAYOUT_60XX)
1973 cal_en_bit = CAL_EN_60XX_BIT;
1974 else
1975 cal_en_bit = CAL_EN_64XX_BIT;
1976 /* select internal reference source to connect to channel 0 */
1977 writew(cal_en_bit |
1978 adc_src_bits(priv(dev)->calibration_source),
1979 priv(dev)->main_iobase + CALIBRATION_REG);
1980 } else {
1981 /* make sure internal calibration source is turned off */
1982 writew(0, priv(dev)->main_iobase + CALIBRATION_REG);
1983 }
1984 /* load internal queue */
1985 bits = 0;
1986 /* set gain */
1987 bits |= ai_range_bits_6xxx(dev, CR_RANGE(insn->chanspec));
1988 /* set single-ended / differential */
1989 bits |= se_diff_bit_6xxx(dev, aref == AREF_DIFF);
1990 if (aref == AREF_COMMON)
1991 bits |= ADC_COMMON_BIT;
1992 bits |= adc_chan_bits(channel);
1993 /* set stop channel */
1994 writew(adc_chan_bits(channel),
1995 priv(dev)->main_iobase + ADC_QUEUE_HIGH_REG);
1996 /* set start channel, and rest of settings */
1997 writew(bits, priv(dev)->main_iobase + ADC_QUEUE_LOAD_REG);
1998 } else {
1999 uint8_t old_cal_range_bits = priv(dev)->i2c_cal_range_bits;
2000
2001 priv(dev)->i2c_cal_range_bits &= ~ADC_SRC_4020_MASK;
2002 if (insn->chanspec & CR_ALT_SOURCE) {
2003 DEBUG_PRINT("reading calibration source\n");
2004 priv(dev)->i2c_cal_range_bits |=
2005 adc_src_4020_bits(priv(dev)->calibration_source);
2006 } else { /* select BNC inputs */
2007 priv(dev)->i2c_cal_range_bits |= adc_src_4020_bits(4);
2008 }
2009 /* select range */
2010 if (range == 0)
2011 priv(dev)->i2c_cal_range_bits |= attenuate_bit(channel);
2012 else
2013 priv(dev)->i2c_cal_range_bits &=
2014 ~attenuate_bit(channel);
2015 /* update calibration/range i2c register only if necessary, as it is very slow */
2016 if (old_cal_range_bits != priv(dev)->i2c_cal_range_bits) {
2017 uint8_t i2c_data = priv(dev)->i2c_cal_range_bits;
2018 i2c_write(dev, RANGE_CAL_I2C_ADDR, &i2c_data,
2019 sizeof(i2c_data));
2020 }
2021
2022 /* 4020 manual asks that sample interval register to be set before writing to convert register.
2023 * Using somewhat arbitrary setting of 4 master clock ticks = 0.1 usec */
2024 writew(0,
2025 priv(dev)->main_iobase + ADC_SAMPLE_INTERVAL_UPPER_REG);
2026 writew(2,
2027 priv(dev)->main_iobase + ADC_SAMPLE_INTERVAL_LOWER_REG);
2028 }
2029
2030 for (n = 0; n < insn->n; n++) {
2031
2032 /* clear adc buffer (inside loop for 4020 sake) */
2033 writew(0, priv(dev)->main_iobase + ADC_BUFFER_CLEAR_REG);
2034
2035 /* trigger conversion, bits sent only matter for 4020 */
2036 writew(adc_convert_chan_4020_bits(CR_CHAN(insn->chanspec)),
2037 priv(dev)->main_iobase + ADC_CONVERT_REG);
2038
2039 /* wait for data */
2040 for (i = 0; i < timeout; i++) {
2041 bits = readw(priv(dev)->main_iobase + HW_STATUS_REG);
2042 DEBUG_PRINT(" pipe bits 0x%x\n", pipe_full_bits(bits));
2043 if (board(dev)->layout == LAYOUT_4020) {
2044 if (readw(priv(dev)->main_iobase +
2045 ADC_WRITE_PNTR_REG))
2046 break;
2047 } else {
2048 if (pipe_full_bits(bits))
2049 break;
2050 }
2051 udelay(1);
2052 }
2053 DEBUG_PRINT(" looped %i times waiting for data\n", i);
2054 if (i == timeout) {
2055 comedi_error(dev, " analog input read insn timed out");
2056 printk(" status 0x%x\n", bits);
2057 return -ETIME;
2058 }
2059 if (board(dev)->layout == LAYOUT_4020)
2060 data[n] =
2061 readl(priv(dev)->dio_counter_iobase +
2062 ADC_FIFO_REG) & 0xffff;
2063 else
2064 data[n] =
2065 readw(priv(dev)->main_iobase + PIPE1_READ_REG);
2066 }
2067
2068 return n;
2069 }
2070
2071 static int ai_config_calibration_source(struct comedi_device *dev,
2072 unsigned int *data)
2073 {
2074 unsigned int source = data[1];
2075 int num_calibration_sources;
2076
2077 if (board(dev)->layout == LAYOUT_60XX)
2078 num_calibration_sources = 16;
2079 else
2080 num_calibration_sources = 8;
2081 if (source >= num_calibration_sources) {
2082 printk("invalid calibration source: %i\n", source);
2083 return -EINVAL;
2084 }
2085
2086 DEBUG_PRINT("setting calibration source to %i\n", source);
2087 priv(dev)->calibration_source = source;
2088
2089 return 2;
2090 }
2091
2092 static int ai_config_block_size(struct comedi_device *dev, unsigned int *data)
2093 {
2094 int fifo_size;
2095 const struct hw_fifo_info *const fifo = board(dev)->ai_fifo;
2096 unsigned int block_size, requested_block_size;
2097 int retval;
2098
2099 requested_block_size = data[1];
2100
2101 if (requested_block_size) {
2102 fifo_size =
2103 requested_block_size * fifo->num_segments / bytes_in_sample;
2104
2105 retval = set_ai_fifo_size(dev, fifo_size);
2106 if (retval < 0)
2107 return retval;
2108
2109 }
2110
2111 block_size = ai_fifo_size(dev) / fifo->num_segments * bytes_in_sample;
2112
2113 data[1] = block_size;
2114
2115 return 2;
2116 }
2117
2118 static int ai_config_master_clock_4020(struct comedi_device *dev,
2119 unsigned int *data)
2120 {
2121 unsigned int divisor = data[4];
2122 int retval = 0;
2123
2124 if (divisor < 2) {
2125 divisor = 2;
2126 retval = -EAGAIN;
2127 }
2128
2129 switch (data[1]) {
2130 case COMEDI_EV_SCAN_BEGIN:
2131 priv(dev)->ext_clock.divisor = divisor;
2132 priv(dev)->ext_clock.chanspec = data[2];
2133 break;
2134 default:
2135 return -EINVAL;
2136 break;
2137 }
2138
2139 data[4] = divisor;
2140
2141 return retval ? retval : 5;
2142 }
2143
2144 /* XXX could add support for 60xx series */
2145 static int ai_config_master_clock(struct comedi_device *dev, unsigned int *data)
2146 {
2147
2148 switch (board(dev)->layout) {
2149 case LAYOUT_4020:
2150 return ai_config_master_clock_4020(dev, data);
2151 break;
2152 default:
2153 return -EINVAL;
2154 break;
2155 }
2156
2157 return -EINVAL;
2158 }
2159
2160 static int ai_config_insn(struct comedi_device *dev, struct comedi_subdevice *s,
2161 struct comedi_insn *insn, unsigned int *data)
2162 {
2163 int id = data[0];
2164
2165 switch (id) {
2166 case INSN_CONFIG_ALT_SOURCE:
2167 return ai_config_calibration_source(dev, data);
2168 break;
2169 case INSN_CONFIG_BLOCK_SIZE:
2170 return ai_config_block_size(dev, data);
2171 break;
2172 case INSN_CONFIG_TIMER_1:
2173 return ai_config_master_clock(dev, data);
2174 break;
2175 default:
2176 return -EINVAL;
2177 break;
2178 }
2179 return -EINVAL;
2180 }
2181
2182 static int ai_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s,
2183 struct comedi_cmd *cmd)
2184 {
2185 int err = 0;
2186 int tmp;
2187 unsigned int tmp_arg, tmp_arg2;
2188 int i;
2189 int aref;
2190 unsigned int triggers;
2191
2192 /* step 1: make sure trigger sources are trivially valid */
2193
2194 tmp = cmd->start_src;
2195 cmd->start_src &= TRIG_NOW | TRIG_EXT;
2196 if (!cmd->start_src || tmp != cmd->start_src)
2197 err++;
2198
2199 tmp = cmd->scan_begin_src;
2200 triggers = TRIG_TIMER;
2201 if (board(dev)->layout == LAYOUT_4020)
2202 triggers |= TRIG_OTHER;
2203 else
2204 triggers |= TRIG_FOLLOW;
2205 cmd->scan_begin_src &= triggers;
2206 if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
2207 err++;
2208
2209 tmp = cmd->convert_src;
2210 triggers = TRIG_TIMER;
2211 if (board(dev)->layout == LAYOUT_4020)
2212 triggers |= TRIG_NOW;
2213 else
2214 triggers |= TRIG_EXT;
2215 cmd->convert_src &= triggers;
2216 if (!cmd->convert_src || tmp != cmd->convert_src)
2217 err++;
2218
2219 tmp = cmd->scan_end_src;
2220 cmd->scan_end_src &= TRIG_COUNT;
2221 if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
2222 err++;
2223
2224 tmp = cmd->stop_src;
2225 cmd->stop_src &= TRIG_COUNT | TRIG_EXT | TRIG_NONE;
2226 if (!cmd->stop_src || tmp != cmd->stop_src)
2227 err++;
2228
2229 if (err)
2230 return 1;
2231
2232 /* step 2: make sure trigger sources are unique and mutually compatible */
2233
2234 /* uniqueness check */
2235 if (cmd->start_src != TRIG_NOW && cmd->start_src != TRIG_EXT)
2236 err++;
2237 if (cmd->scan_begin_src != TRIG_TIMER &&
2238 cmd->scan_begin_src != TRIG_OTHER &&
2239 cmd->scan_begin_src != TRIG_FOLLOW)
2240 err++;
2241 if (cmd->convert_src != TRIG_TIMER &&
2242 cmd->convert_src != TRIG_EXT && cmd->convert_src != TRIG_NOW)
2243 err++;
2244 if (cmd->stop_src != TRIG_COUNT &&
2245 cmd->stop_src != TRIG_NONE && cmd->stop_src != TRIG_EXT)
2246 err++;
2247
2248 /* compatibility check */
2249 if (cmd->convert_src == TRIG_EXT && cmd->scan_begin_src == TRIG_TIMER)
2250 err++;
2251 if (cmd->stop_src != TRIG_COUNT &&
2252 cmd->stop_src != TRIG_NONE && cmd->stop_src != TRIG_EXT)
2253 err++;
2254
2255 if (err)
2256 return 2;
2257
2258 /* step 3: make sure arguments are trivially compatible */
2259
2260 if (cmd->convert_src == TRIG_TIMER) {
2261 if (board(dev)->layout == LAYOUT_4020) {
2262 if (cmd->convert_arg) {
2263 cmd->convert_arg = 0;
2264 err++;
2265 }
2266 } else {
2267 if (cmd->convert_arg < board(dev)->ai_speed) {
2268 cmd->convert_arg = board(dev)->ai_speed;
2269 err++;
2270 }
2271 if (cmd->scan_begin_src == TRIG_TIMER) {
2272 /* if scans are timed faster than conversion rate allows */
2273 if (cmd->convert_arg * cmd->chanlist_len >
2274 cmd->scan_begin_arg) {
2275 cmd->scan_begin_arg =
2276 cmd->convert_arg *
2277 cmd->chanlist_len;
2278 err++;
2279 }
2280 }
2281 }
2282 }
2283
2284 if (!cmd->chanlist_len) {
2285 cmd->chanlist_len = 1;
2286 err++;
2287 }
2288 if (cmd->scan_end_arg != cmd->chanlist_len) {
2289 cmd->scan_end_arg = cmd->chanlist_len;
2290 err++;
2291 }
2292
2293 switch (cmd->stop_src) {
2294 case TRIG_EXT:
2295 break;
2296 case TRIG_COUNT:
2297 if (!cmd->stop_arg) {
2298 cmd->stop_arg = 1;
2299 err++;
2300 }
2301 break;
2302 case TRIG_NONE:
2303 if (cmd->stop_arg != 0) {
2304 cmd->stop_arg = 0;
2305 err++;
2306 }
2307 break;
2308 default:
2309 break;
2310 }
2311
2312 if (err)
2313 return 3;
2314
2315 /* step 4: fix up any arguments */
2316
2317 if (cmd->convert_src == TRIG_TIMER) {
2318 tmp_arg = cmd->convert_arg;
2319 tmp_arg2 = cmd->scan_begin_arg;
2320 check_adc_timing(dev, cmd);
2321 if (tmp_arg != cmd->convert_arg)
2322 err++;
2323 if (tmp_arg2 != cmd->scan_begin_arg)
2324 err++;
2325 }
2326
2327 if (err)
2328 return 4;
2329
2330 /* make sure user is doesn't change analog reference mid chanlist */
2331 if (cmd->chanlist) {
2332 aref = CR_AREF(cmd->chanlist[0]);
2333 for (i = 1; i < cmd->chanlist_len; i++) {
2334 if (aref != CR_AREF(cmd->chanlist[i])) {
2335 comedi_error(dev,
2336 "all elements in chanlist must use the same analog reference");
2337 err++;
2338 break;
2339 }
2340 }
2341 /* check 4020 chanlist */
2342 if (board(dev)->layout == LAYOUT_4020) {
2343 unsigned int first_channel = CR_CHAN(cmd->chanlist[0]);
2344 for (i = 1; i < cmd->chanlist_len; i++) {
2345 if (CR_CHAN(cmd->chanlist[i]) !=
2346 first_channel + i) {
2347 comedi_error(dev,
2348 "chanlist must use consecutive channels");
2349 err++;
2350 break;
2351 }
2352 }
2353 if (cmd->chanlist_len == 3) {
2354 comedi_error(dev,
2355 "chanlist cannot be 3 channels long, use 1, 2, or 4 channels");
2356 err++;
2357 }
2358 }
2359 }
2360
2361 if (err)
2362 return 5;
2363
2364 return 0;
2365 }
2366
2367 static int use_hw_sample_counter(struct comedi_cmd *cmd)
2368 {
2369 /* disable for now until I work out a race */
2370 return 0;
2371
2372 if (cmd->stop_src == TRIG_COUNT && cmd->stop_arg <= max_counter_value)
2373 return 1;
2374 else
2375 return 0;
2376 }
2377
2378 static void setup_sample_counters(struct comedi_device *dev,
2379 struct comedi_cmd *cmd)
2380 {
2381 if (cmd->stop_src == TRIG_COUNT) {
2382 /* set software count */
2383 priv(dev)->ai_count = cmd->stop_arg * cmd->chanlist_len;
2384 }
2385 /* load hardware conversion counter */
2386 if (use_hw_sample_counter(cmd)) {
2387 writew(cmd->stop_arg & 0xffff,
2388 priv(dev)->main_iobase + ADC_COUNT_LOWER_REG);
2389 writew((cmd->stop_arg >> 16) & 0xff,
2390 priv(dev)->main_iobase + ADC_COUNT_UPPER_REG);
2391 } else {
2392 writew(1, priv(dev)->main_iobase + ADC_COUNT_LOWER_REG);
2393 }
2394 }
2395
2396 static inline unsigned int dma_transfer_size(struct comedi_device *dev)
2397 {
2398 unsigned int num_samples;
2399
2400 num_samples =
2401 priv(dev)->ai_fifo_segment_length *
2402 board(dev)->ai_fifo->sample_packing_ratio;
2403 if (num_samples > DMA_BUFFER_SIZE / sizeof(uint16_t))
2404 num_samples = DMA_BUFFER_SIZE / sizeof(uint16_t);
2405
2406 return num_samples;
2407 }
2408
2409 static void disable_ai_pacing(struct comedi_device *dev)
2410 {
2411 unsigned long flags;
2412
2413 disable_ai_interrupts(dev);
2414
2415 spin_lock_irqsave(&dev->spinlock, flags);
2416 priv(dev)->adc_control1_bits &= ~ADC_SW_GATE_BIT;
2417 writew(priv(dev)->adc_control1_bits,
2418 priv(dev)->main_iobase + ADC_CONTROL1_REG);
2419 spin_unlock_irqrestore(&dev->spinlock, flags);
2420
2421 /* disable pacing, triggering, etc */
2422 writew(ADC_DMA_DISABLE_BIT | ADC_SOFT_GATE_BITS | ADC_GATE_LEVEL_BIT,
2423 priv(dev)->main_iobase + ADC_CONTROL0_REG);
2424 }
2425
2426 static void disable_ai_interrupts(struct comedi_device *dev)
2427 {
2428 unsigned long flags;
2429
2430 spin_lock_irqsave(&dev->spinlock, flags);
2431 priv(dev)->intr_enable_bits &=
2432 ~EN_ADC_INTR_SRC_BIT & ~EN_ADC_DONE_INTR_BIT &
2433 ~EN_ADC_ACTIVE_INTR_BIT & ~EN_ADC_STOP_INTR_BIT &
2434 ~EN_ADC_OVERRUN_BIT & ~ADC_INTR_SRC_MASK;
2435 writew(priv(dev)->intr_enable_bits,
2436 priv(dev)->main_iobase + INTR_ENABLE_REG);
2437 spin_unlock_irqrestore(&dev->spinlock, flags);
2438
2439 DEBUG_PRINT("intr enable bits 0x%x\n", priv(dev)->intr_enable_bits);
2440 }
2441
2442 static void enable_ai_interrupts(struct comedi_device *dev,
2443 const struct comedi_cmd *cmd)
2444 {
2445 uint32_t bits;
2446 unsigned long flags;
2447
2448 bits = EN_ADC_OVERRUN_BIT | EN_ADC_DONE_INTR_BIT |
2449 EN_ADC_ACTIVE_INTR_BIT | EN_ADC_STOP_INTR_BIT;
2450 /* Use pio transfer and interrupt on end of conversion if TRIG_WAKE_EOS flag is set. */
2451 if (cmd->flags & TRIG_WAKE_EOS) {
2452 /* 4020 doesn't support pio transfers except for fifo dregs */
2453 if (board(dev)->layout != LAYOUT_4020)
2454 bits |= ADC_INTR_EOSCAN_BITS | EN_ADC_INTR_SRC_BIT;
2455 }
2456 spin_lock_irqsave(&dev->spinlock, flags);
2457 priv(dev)->intr_enable_bits |= bits;
2458 writew(priv(dev)->intr_enable_bits,
2459 priv(dev)->main_iobase + INTR_ENABLE_REG);
2460 DEBUG_PRINT("intr enable bits 0x%x\n", priv(dev)->intr_enable_bits);
2461 spin_unlock_irqrestore(&dev->spinlock, flags);
2462 }
2463
2464 static uint32_t ai_convert_counter_6xxx(const struct comedi_device *dev,
2465 const struct comedi_cmd *cmd)
2466 {
2467 /* supposed to load counter with desired divisor minus 3 */
2468 return cmd->convert_arg / TIMER_BASE - 3;
2469 }
2470
2471 static uint32_t ai_scan_counter_6xxx(struct comedi_device *dev,
2472 struct comedi_cmd *cmd)
2473 {
2474 uint32_t count;
2475 /* figure out how long we need to delay at end of scan */
2476 switch (cmd->scan_begin_src) {
2477 case TRIG_TIMER:
2478 count = (cmd->scan_begin_arg -
2479 (cmd->convert_arg * (cmd->chanlist_len - 1)))
2480 / TIMER_BASE;
2481 break;
2482 case TRIG_FOLLOW:
2483 count = cmd->convert_arg / TIMER_BASE;
2484 break;
2485 default:
2486 return 0;
2487 break;
2488 }
2489 return count - 3;
2490 }
2491
2492 static uint32_t ai_convert_counter_4020(struct comedi_device *dev,
2493 struct comedi_cmd *cmd)
2494 {
2495 unsigned int divisor;
2496
2497 switch (cmd->scan_begin_src) {
2498 case TRIG_TIMER:
2499 divisor = cmd->scan_begin_arg / TIMER_BASE;
2500 break;
2501 case TRIG_OTHER:
2502 divisor = priv(dev)->ext_clock.divisor;
2503 break;
2504 default: /* should never happen */
2505 comedi_error(dev, "bug! failed to set ai pacing!");
2506 divisor = 1000;
2507 break;
2508 }
2509
2510 /* supposed to load counter with desired divisor minus 2 for 4020 */
2511 return divisor - 2;
2512 }
2513
2514 static void select_master_clock_4020(struct comedi_device *dev,
2515 const struct comedi_cmd *cmd)
2516 {
2517 /* select internal/external master clock */
2518 priv(dev)->hw_config_bits &= ~MASTER_CLOCK_4020_MASK;
2519 if (cmd->scan_begin_src == TRIG_OTHER) {
2520 int chanspec = priv(dev)->ext_clock.chanspec;
2521
2522 if (CR_CHAN(chanspec))
2523 priv(dev)->hw_config_bits |= BNC_CLOCK_4020_BITS;
2524 else
2525 priv(dev)->hw_config_bits |= EXT_CLOCK_4020_BITS;
2526 } else {
2527 priv(dev)->hw_config_bits |= INTERNAL_CLOCK_4020_BITS;
2528 }
2529 writew(priv(dev)->hw_config_bits,
2530 priv(dev)->main_iobase + HW_CONFIG_REG);
2531 }
2532
2533 static void select_master_clock(struct comedi_device *dev,
2534 const struct comedi_cmd *cmd)
2535 {
2536 switch (board(dev)->layout) {
2537 case LAYOUT_4020:
2538 select_master_clock_4020(dev, cmd);
2539 break;
2540 default:
2541 break;
2542 }
2543 }
2544
2545 static inline void dma_start_sync(struct comedi_device *dev,
2546 unsigned int channel)
2547 {
2548 unsigned long flags;
2549
2550 /* spinlock for plx dma control/status reg */
2551 spin_lock_irqsave(&dev->spinlock, flags);
2552 if (channel)
2553 writeb(PLX_DMA_EN_BIT | PLX_DMA_START_BIT |
2554 PLX_CLEAR_DMA_INTR_BIT,
2555 priv(dev)->plx9080_iobase + PLX_DMA1_CS_REG);
2556 else
2557 writeb(PLX_DMA_EN_BIT | PLX_DMA_START_BIT |
2558 PLX_CLEAR_DMA_INTR_BIT,
2559 priv(dev)->plx9080_iobase + PLX_DMA0_CS_REG);
2560 spin_unlock_irqrestore(&dev->spinlock, flags);
2561 }
2562
2563 static void set_ai_pacing(struct comedi_device *dev, struct comedi_cmd *cmd)
2564 {
2565 uint32_t convert_counter = 0, scan_counter = 0;
2566
2567 check_adc_timing(dev, cmd);
2568
2569 select_master_clock(dev, cmd);
2570
2571 if (board(dev)->layout == LAYOUT_4020) {
2572 convert_counter = ai_convert_counter_4020(dev, cmd);
2573 } else {
2574 convert_counter = ai_convert_counter_6xxx(dev, cmd);
2575 scan_counter = ai_scan_counter_6xxx(dev, cmd);
2576 }
2577
2578 /* load lower 16 bits of convert interval */
2579 writew(convert_counter & 0xffff,
2580 priv(dev)->main_iobase + ADC_SAMPLE_INTERVAL_LOWER_REG);
2581 DEBUG_PRINT("convert counter 0x%x\n", convert_counter);
2582 /* load upper 8 bits of convert interval */
2583 writew((convert_counter >> 16) & 0xff,
2584 priv(dev)->main_iobase + ADC_SAMPLE_INTERVAL_UPPER_REG);
2585 /* load lower 16 bits of scan delay */
2586 writew(scan_counter & 0xffff,
2587 priv(dev)->main_iobase + ADC_DELAY_INTERVAL_LOWER_REG);
2588 /* load upper 8 bits of scan delay */
2589 writew((scan_counter >> 16) & 0xff,
2590 priv(dev)->main_iobase + ADC_DELAY_INTERVAL_UPPER_REG);
2591 DEBUG_PRINT("scan counter 0x%x\n", scan_counter);
2592 }
2593
2594 static int use_internal_queue_6xxx(const struct comedi_cmd *cmd)
2595 {
2596 int i;
2597 for (i = 0; i + 1 < cmd->chanlist_len; i++) {
2598 if (CR_CHAN(cmd->chanlist[i + 1]) !=
2599 CR_CHAN(cmd->chanlist[i]) + 1)
2600 return 0;
2601 if (CR_RANGE(cmd->chanlist[i + 1]) !=
2602 CR_RANGE(cmd->chanlist[i]))
2603 return 0;
2604 if (CR_AREF(cmd->chanlist[i + 1]) != CR_AREF(cmd->chanlist[i]))
2605 return 0;
2606 }
2607 return 1;
2608 }
2609
2610 static int setup_channel_queue(struct comedi_device *dev,
2611 const struct comedi_cmd *cmd)
2612 {
2613 unsigned short bits;
2614 int i;
2615
2616 if (board(dev)->layout != LAYOUT_4020) {
2617 if (use_internal_queue_6xxx(cmd)) {
2618 priv(dev)->hw_config_bits &= ~EXT_QUEUE_BIT;
2619 writew(priv(dev)->hw_config_bits,
2620 priv(dev)->main_iobase + HW_CONFIG_REG);
2621 bits = 0;
2622 /* set channel */
2623 bits |= adc_chan_bits(CR_CHAN(cmd->chanlist[0]));
2624 /* set gain */
2625 bits |= ai_range_bits_6xxx(dev,
2626 CR_RANGE(cmd->chanlist[0]));
2627 /* set single-ended / differential */
2628 bits |= se_diff_bit_6xxx(dev,
2629 CR_AREF(cmd->chanlist[0]) ==
2630 AREF_DIFF);
2631 if (CR_AREF(cmd->chanlist[0]) == AREF_COMMON)
2632 bits |= ADC_COMMON_BIT;
2633 /* set stop channel */
2634 writew(adc_chan_bits
2635 (CR_CHAN(cmd->chanlist[cmd->chanlist_len - 1])),
2636 priv(dev)->main_iobase + ADC_QUEUE_HIGH_REG);
2637 /* set start channel, and rest of settings */
2638 writew(bits,
2639 priv(dev)->main_iobase + ADC_QUEUE_LOAD_REG);
2640 } else {
2641 /* use external queue */
2642 if (dev->write_subdev && dev->write_subdev->busy) {
2643 warn_external_queue(dev);
2644 return -EBUSY;
2645 }
2646 priv(dev)->hw_config_bits |= EXT_QUEUE_BIT;
2647 writew(priv(dev)->hw_config_bits,
2648 priv(dev)->main_iobase + HW_CONFIG_REG);
2649 /* clear DAC buffer to prevent weird interactions */
2650 writew(0,
2651 priv(dev)->main_iobase + DAC_BUFFER_CLEAR_REG);
2652 /* clear queue pointer */
2653 writew(0, priv(dev)->main_iobase + ADC_QUEUE_CLEAR_REG);
2654 /* load external queue */
2655 for (i = 0; i < cmd->chanlist_len; i++) {
2656 bits = 0;
2657 /* set channel */
2658 bits |=
2659 adc_chan_bits(CR_CHAN(cmd->chanlist[i]));
2660 /* set gain */
2661 bits |= ai_range_bits_6xxx(dev,
2662 CR_RANGE(cmd->
2663 chanlist
2664 [i]));
2665 /* set single-ended / differential */
2666 bits |= se_diff_bit_6xxx(dev,
2667 CR_AREF(cmd->
2668 chanlist[i]) ==
2669 AREF_DIFF);
2670 if (CR_AREF(cmd->chanlist[i]) == AREF_COMMON)
2671 bits |= ADC_COMMON_BIT;
2672 /* mark end of queue */
2673 if (i == cmd->chanlist_len - 1)
2674 bits |= QUEUE_EOSCAN_BIT |
2675 QUEUE_EOSEQ_BIT;
2676 writew(bits,
2677 priv(dev)->main_iobase +
2678 ADC_QUEUE_FIFO_REG);
2679 DEBUG_PRINT
2680 ("wrote 0x%x to external channel queue\n",
2681 bits);
2682 }
2683 /* doing a queue clear is not specified in board docs,
2684 * but required for reliable operation */
2685 writew(0, priv(dev)->main_iobase + ADC_QUEUE_CLEAR_REG);
2686 /* prime queue holding register */
2687 writew(0, priv(dev)->main_iobase + ADC_QUEUE_LOAD_REG);
2688 }
2689 } else {
2690 unsigned short old_cal_range_bits =
2691 priv(dev)->i2c_cal_range_bits;
2692
2693 priv(dev)->i2c_cal_range_bits &= ~ADC_SRC_4020_MASK;
2694 /* select BNC inputs */
2695 priv(dev)->i2c_cal_range_bits |= adc_src_4020_bits(4);
2696 /* select ranges */
2697 for (i = 0; i < cmd->chanlist_len; i++) {
2698 unsigned int channel = CR_CHAN(cmd->chanlist[i]);
2699 unsigned int range = CR_RANGE(cmd->chanlist[i]);
2700
2701 if (range == 0)
2702 priv(dev)->i2c_cal_range_bits |=
2703 attenuate_bit(channel);
2704 else
2705 priv(dev)->i2c_cal_range_bits &=
2706 ~attenuate_bit(channel);
2707 }
2708 /* update calibration/range i2c register only if necessary, as it is very slow */
2709 if (old_cal_range_bits != priv(dev)->i2c_cal_range_bits) {
2710 uint8_t i2c_data = priv(dev)->i2c_cal_range_bits;
2711 i2c_write(dev, RANGE_CAL_I2C_ADDR, &i2c_data,
2712 sizeof(i2c_data));
2713 }
2714 }
2715 return 0;
2716 }
2717
2718 static inline void load_first_dma_descriptor(struct comedi_device *dev,
2719 unsigned int dma_channel,
2720 unsigned int descriptor_bits)
2721 {
2722 /* The transfer size, pci address, and local address registers
2723 * are supposedly unused during chained dma,
2724 * but I have found that left over values from last operation
2725 * occasionally cause problems with transfer of first dma
2726 * block. Initializing them to zero seems to fix the problem. */
2727 if (dma_channel) {
2728 writel(0,
2729 priv(dev)->plx9080_iobase + PLX_DMA1_TRANSFER_SIZE_REG);
2730 writel(0, priv(dev)->plx9080_iobase + PLX_DMA1_PCI_ADDRESS_REG);
2731 writel(0,
2732 priv(dev)->plx9080_iobase + PLX_DMA1_LOCAL_ADDRESS_REG);
2733 writel(descriptor_bits,
2734 priv(dev)->plx9080_iobase + PLX_DMA1_DESCRIPTOR_REG);
2735 } else {
2736 writel(0,
2737 priv(dev)->plx9080_iobase + PLX_DMA0_TRANSFER_SIZE_REG);
2738 writel(0, priv(dev)->plx9080_iobase + PLX_DMA0_PCI_ADDRESS_REG);
2739 writel(0,
2740 priv(dev)->plx9080_iobase + PLX_DMA0_LOCAL_ADDRESS_REG);
2741 writel(descriptor_bits,
2742 priv(dev)->plx9080_iobase + PLX_DMA0_DESCRIPTOR_REG);
2743 }
2744 }
2745
2746 static int ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
2747 {
2748 struct comedi_async *async = s->async;
2749 struct comedi_cmd *cmd = &async->cmd;
2750 uint32_t bits;
2751 unsigned int i;
2752 unsigned long flags;
2753 int retval;
2754
2755 disable_ai_pacing(dev);
2756 abort_dma(dev, 1);
2757
2758 retval = setup_channel_queue(dev, cmd);
2759 if (retval < 0)
2760 return retval;
2761
2762 /* make sure internal calibration source is turned off */
2763 writew(0, priv(dev)->main_iobase + CALIBRATION_REG);
2764
2765 set_ai_pacing(dev, cmd);
2766
2767 setup_sample_counters(dev, cmd);
2768
2769 enable_ai_interrupts(dev, cmd);
2770
2771 spin_lock_irqsave(&dev->spinlock, flags);
2772 /* set mode, allow conversions through software gate */
2773 priv(dev)->adc_control1_bits |= ADC_SW_GATE_BIT;
2774 priv(dev)->adc_control1_bits &= ~ADC_DITHER_BIT;
2775 if (board(dev)->layout != LAYOUT_4020) {
2776 priv(dev)->adc_control1_bits &= ~ADC_MODE_MASK;
2777 if (cmd->convert_src == TRIG_EXT)
2778 priv(dev)->adc_control1_bits |= adc_mode_bits(13); /* good old mode 13 */
2779 else
2780 priv(dev)->adc_control1_bits |= adc_mode_bits(8); /* mode 8. What else could you need? */
2781 } else {
2782 priv(dev)->adc_control1_bits &= ~CHANNEL_MODE_4020_MASK;
2783 if (cmd->chanlist_len == 4)
2784 priv(dev)->adc_control1_bits |= FOUR_CHANNEL_4020_BITS;
2785 else if (cmd->chanlist_len == 2)
2786 priv(dev)->adc_control1_bits |= TWO_CHANNEL_4020_BITS;
2787 priv(dev)->adc_control1_bits &= ~ADC_LO_CHANNEL_4020_MASK;
2788 priv(dev)->adc_control1_bits |=
2789 adc_lo_chan_4020_bits(CR_CHAN(cmd->chanlist[0]));
2790 priv(dev)->adc_control1_bits &= ~ADC_HI_CHANNEL_4020_MASK;
2791 priv(dev)->adc_control1_bits |=
2792 adc_hi_chan_4020_bits(CR_CHAN
2793 (cmd->
2794 chanlist[cmd->chanlist_len - 1]));
2795 }
2796 writew(priv(dev)->adc_control1_bits,
2797 priv(dev)->main_iobase + ADC_CONTROL1_REG);
2798 DEBUG_PRINT("control1 bits 0x%x\n", priv(dev)->adc_control1_bits);
2799 spin_unlock_irqrestore(&dev->spinlock, flags);
2800
2801 /* clear adc buffer */
2802 writew(0, priv(dev)->main_iobase + ADC_BUFFER_CLEAR_REG);
2803
2804 if ((cmd->flags & TRIG_WAKE_EOS) == 0 ||
2805 board(dev)->layout == LAYOUT_4020) {
2806 priv(dev)->ai_dma_index = 0;
2807
2808 /* set dma transfer size */
2809 for (i = 0; i < ai_dma_ring_count(board(dev)); i++)
2810 priv(dev)->ai_dma_desc[i].transfer_size =
2811 cpu_to_le32(dma_transfer_size(dev) *
2812 sizeof(uint16_t));
2813
2814 /* give location of first dma descriptor */
2815 load_first_dma_descriptor(dev, 1,
2816 priv(dev)->ai_dma_desc_bus_addr |
2817 PLX_DESC_IN_PCI_BIT |
2818 PLX_INTR_TERM_COUNT |
2819 PLX_XFER_LOCAL_TO_PCI);
2820
2821 dma_start_sync(dev, 1);
2822 }
2823
2824 if (board(dev)->layout == LAYOUT_4020) {
2825 /* set source for external triggers */
2826 bits = 0;
2827 if (cmd->start_src == TRIG_EXT && CR_CHAN(cmd->start_arg))
2828 bits |= EXT_START_TRIG_BNC_BIT;
2829 if (cmd->stop_src == TRIG_EXT && CR_CHAN(cmd->stop_arg))
2830 bits |= EXT_STOP_TRIG_BNC_BIT;
2831 writew(bits, priv(dev)->main_iobase + DAQ_ATRIG_LOW_4020_REG);
2832 }
2833
2834 spin_lock_irqsave(&dev->spinlock, flags);
2835
2836 /* enable pacing, triggering, etc */
2837 bits = ADC_ENABLE_BIT | ADC_SOFT_GATE_BITS | ADC_GATE_LEVEL_BIT;
2838 if (cmd->flags & TRIG_WAKE_EOS)
2839 bits |= ADC_DMA_DISABLE_BIT;
2840 /* set start trigger */
2841 if (cmd->start_src == TRIG_EXT) {
2842 bits |= ADC_START_TRIG_EXT_BITS;
2843 if (cmd->start_arg & CR_INVERT)
2844 bits |= ADC_START_TRIG_FALLING_BIT;
2845 } else if (cmd->start_src == TRIG_NOW)
2846 bits |= ADC_START_TRIG_SOFT_BITS;
2847 if (use_hw_sample_counter(cmd))
2848 bits |= ADC_SAMPLE_COUNTER_EN_BIT;
2849 writew(bits, priv(dev)->main_iobase + ADC_CONTROL0_REG);
2850 DEBUG_PRINT("control0 bits 0x%x\n", bits);
2851
2852 priv(dev)->ai_cmd_running = 1;
2853
2854 spin_unlock_irqrestore(&dev->spinlock, flags);
2855
2856 /* start aquisition */
2857 if (cmd->start_src == TRIG_NOW) {
2858 writew(0, priv(dev)->main_iobase + ADC_START_REG);
2859 DEBUG_PRINT("soft trig\n");
2860 }
2861
2862 return 0;
2863 }
2864
2865 /* read num_samples from 16 bit wide ai fifo */
2866 static void pio_drain_ai_fifo_16(struct comedi_device *dev)
2867 {
2868 struct comedi_subdevice *s = dev->read_subdev;
2869 struct comedi_async *async = s->async;
2870 struct comedi_cmd *cmd = &async->cmd;
2871 unsigned int i;
2872 uint16_t prepost_bits;
2873 int read_segment, read_index, write_segment, write_index;
2874 int num_samples;
2875
2876 do {
2877 /* get least significant 15 bits */
2878 read_index =
2879 readw(priv(dev)->main_iobase + ADC_READ_PNTR_REG) & 0x7fff;
2880 write_index =
2881 readw(priv(dev)->main_iobase + ADC_WRITE_PNTR_REG) & 0x7fff;
2882 /* Get most significant bits (grey code). Different boards use different code
2883 * so use a scheme that doesn't depend on encoding. This read must
2884 * occur after reading least significant 15 bits to avoid race
2885 * with fifo switching to next segment. */
2886 prepost_bits = readw(priv(dev)->main_iobase + PREPOST_REG);
2887
2888 /* if read and write pointers are not on the same fifo segment, read to the
2889 * end of the read segment */
2890 read_segment = adc_upper_read_ptr_code(prepost_bits);
2891 write_segment = adc_upper_write_ptr_code(prepost_bits);
2892
2893 DEBUG_PRINT(" rd seg %i, wrt seg %i, rd idx %i, wrt idx %i\n",
2894 read_segment, write_segment, read_index,
2895 write_index);
2896
2897 if (read_segment != write_segment)
2898 num_samples =
2899 priv(dev)->ai_fifo_segment_length - read_index;
2900 else
2901 num_samples = write_index - read_index;
2902
2903 if (cmd->stop_src == TRIG_COUNT) {
2904 if (priv(dev)->ai_count == 0)
2905 break;
2906 if (num_samples > priv(dev)->ai_count)
2907 num_samples = priv(dev)->ai_count;
2908
2909 priv(dev)->ai_count -= num_samples;
2910 }
2911
2912 if (num_samples < 0) {
2913 printk(" cb_pcidas64: bug! num_samples < 0\n");
2914 break;
2915 }
2916
2917 DEBUG_PRINT(" read %i samples from fifo\n", num_samples);
2918
2919 for (i = 0; i < num_samples; i++) {
2920 cfc_write_to_buffer(s,
2921 readw(priv(dev)->main_iobase +
2922 ADC_FIFO_REG));
2923 }
2924
2925 } while (read_segment != write_segment);
2926 }
2927
2928 /* Read from 32 bit wide ai fifo of 4020 - deal with insane grey coding of pointers.
2929 * The pci-4020 hardware only supports
2930 * dma transfers (it only supports the use of pio for draining the last remaining
2931 * points from the fifo when a data aquisition operation has completed).
2932 */
2933 static void pio_drain_ai_fifo_32(struct comedi_device *dev)
2934 {
2935 struct comedi_subdevice *s = dev->read_subdev;
2936 struct comedi_async *async = s->async;
2937 struct comedi_cmd *cmd = &async->cmd;
2938 unsigned int i;
2939 unsigned int max_transfer = 100000;
2940 uint32_t fifo_data;
2941 int write_code =
2942 readw(priv(dev)->main_iobase + ADC_WRITE_PNTR_REG) & 0x7fff;
2943 int read_code =
2944 readw(priv(dev)->main_iobase + ADC_READ_PNTR_REG) & 0x7fff;
2945
2946 if (cmd->stop_src == TRIG_COUNT) {
2947 if (max_transfer > priv(dev)->ai_count)
2948 max_transfer = priv(dev)->ai_count;
2949
2950 }
2951 for (i = 0; read_code != write_code && i < max_transfer;) {
2952 fifo_data = readl(priv(dev)->dio_counter_iobase + ADC_FIFO_REG);
2953 cfc_write_to_buffer(s, fifo_data & 0xffff);
2954 i++;
2955 if (i < max_transfer) {
2956 cfc_write_to_buffer(s, (fifo_data >> 16) & 0xffff);
2957 i++;
2958 }
2959 read_code =
2960 readw(priv(dev)->main_iobase + ADC_READ_PNTR_REG) & 0x7fff;
2961 }
2962 priv(dev)->ai_count -= i;
2963 }
2964
2965 /* empty fifo */
2966 static void pio_drain_ai_fifo(struct comedi_device *dev)
2967 {
2968 if (board(dev)->layout == LAYOUT_4020)
2969 pio_drain_ai_fifo_32(dev);
2970 else
2971 pio_drain_ai_fifo_16(dev);
2972 }
2973
2974 static void drain_dma_buffers(struct comedi_device *dev, unsigned int channel)
2975 {
2976 struct comedi_async *async = dev->read_subdev->async;
2977 uint32_t next_transfer_addr;
2978 int j;
2979 int num_samples = 0;
2980 void __iomem *pci_addr_reg;
2981
2982 if (channel)
2983 pci_addr_reg =
2984 priv(dev)->plx9080_iobase + PLX_DMA1_PCI_ADDRESS_REG;
2985 else
2986 pci_addr_reg =
2987 priv(dev)->plx9080_iobase + PLX_DMA0_PCI_ADDRESS_REG;
2988
2989 /* loop until we have read all the full buffers */
2990 for (j = 0, next_transfer_addr = readl(pci_addr_reg);
2991 (next_transfer_addr <
2992 priv(dev)->ai_buffer_bus_addr[priv(dev)->ai_dma_index]
2993 || next_transfer_addr >=
2994 priv(dev)->ai_buffer_bus_addr[priv(dev)->ai_dma_index] +
2995 DMA_BUFFER_SIZE) && j < ai_dma_ring_count(board(dev)); j++) {
2996 /* transfer data from dma buffer to comedi buffer */
2997 num_samples = dma_transfer_size(dev);
2998 if (async->cmd.stop_src == TRIG_COUNT) {
2999 if (num_samples > priv(dev)->ai_count)
3000 num_samples = priv(dev)->ai_count;
3001 priv(dev)->ai_count -= num_samples;
3002 }
3003 cfc_write_array_to_buffer(dev->read_subdev,
3004 priv(dev)->ai_buffer[priv(dev)->
3005 ai_dma_index],
3006 num_samples * sizeof(uint16_t));
3007 priv(dev)->ai_dma_index =
3008 (priv(dev)->ai_dma_index +
3009 1) % ai_dma_ring_count(board(dev));
3010
3011 DEBUG_PRINT("next buffer addr 0x%lx\n",
3012 (unsigned long)priv(dev)->
3013 ai_buffer_bus_addr[priv(dev)->ai_dma_index]);
3014 DEBUG_PRINT("pci addr reg 0x%x\n", next_transfer_addr);
3015 }
3016 /* XXX check for dma ring buffer overrun (use end-of-chain bit to mark last
3017 * unused buffer) */
3018 }
3019
3020 static void handle_ai_interrupt(struct comedi_device *dev,
3021 unsigned short status,
3022 unsigned int plx_status)
3023 {
3024 struct comedi_subdevice *s = dev->read_subdev;
3025 struct comedi_async *async = s->async;
3026 struct comedi_cmd *cmd = &async->cmd;
3027 uint8_t dma1_status;
3028 unsigned long flags;
3029
3030 /* check for fifo overrun */
3031 if (status & ADC_OVERRUN_BIT) {
3032 comedi_error(dev, "fifo overrun");
3033 async->events |= COMEDI_CB_EOA | COMEDI_CB_ERROR;
3034 }
3035 /* spin lock makes sure noone else changes plx dma control reg */
3036 spin_lock_irqsave(&dev->spinlock, flags);
3037 dma1_status = readb(priv(dev)->plx9080_iobase + PLX_DMA1_CS_REG);
3038 if (plx_status & ICS_DMA1_A) { /* dma chan 1 interrupt */
3039 writeb((dma1_status & PLX_DMA_EN_BIT) | PLX_CLEAR_DMA_INTR_BIT,
3040 priv(dev)->plx9080_iobase + PLX_DMA1_CS_REG);
3041 DEBUG_PRINT("dma1 status 0x%x\n", dma1_status);
3042
3043 if (dma1_status & PLX_DMA_EN_BIT)
3044 drain_dma_buffers(dev, 1);
3045
3046 DEBUG_PRINT(" cleared dma ch1 interrupt\n");
3047 }
3048 spin_unlock_irqrestore(&dev->spinlock, flags);
3049
3050 if (status & ADC_DONE_BIT)
3051 DEBUG_PRINT("adc done interrupt\n");
3052
3053 /* drain fifo with pio */
3054 if ((status & ADC_DONE_BIT) ||
3055 ((cmd->flags & TRIG_WAKE_EOS) &&
3056 (status & ADC_INTR_PENDING_BIT) &&
3057 (board(dev)->layout != LAYOUT_4020))) {
3058 DEBUG_PRINT("pio fifo drain\n");
3059 spin_lock_irqsave(&dev->spinlock, flags);
3060 if (priv(dev)->ai_cmd_running) {
3061 spin_unlock_irqrestore(&dev->spinlock, flags);
3062 pio_drain_ai_fifo(dev);
3063 } else
3064 spin_unlock_irqrestore(&dev->spinlock, flags);
3065 }
3066 /* if we are have all the data, then quit */
3067 if ((cmd->stop_src == TRIG_COUNT && priv(dev)->ai_count <= 0) ||
3068 (cmd->stop_src == TRIG_EXT && (status & ADC_STOP_BIT))) {
3069 async->events |= COMEDI_CB_EOA;
3070 }
3071
3072 cfc_handle_events(dev, s);
3073 }
3074
3075 static inline unsigned int prev_ao_dma_index(struct comedi_device *dev)
3076 {
3077 unsigned int buffer_index;
3078
3079 if (priv(dev)->ao_dma_index == 0)
3080 buffer_index = AO_DMA_RING_COUNT - 1;
3081 else
3082 buffer_index = priv(dev)->ao_dma_index - 1;
3083 return buffer_index;
3084 }
3085
3086 static int last_ao_dma_load_completed(struct comedi_device *dev)
3087 {
3088 unsigned int buffer_index;
3089 unsigned int transfer_address;
3090 unsigned short dma_status;
3091
3092 buffer_index = prev_ao_dma_index(dev);
3093 dma_status = readb(priv(dev)->plx9080_iobase + PLX_DMA0_CS_REG);
3094 if ((dma_status & PLX_DMA_DONE_BIT) == 0)
3095 return 0;
3096
3097 transfer_address =
3098 readl(priv(dev)->plx9080_iobase + PLX_DMA0_PCI_ADDRESS_REG);
3099 if (transfer_address != priv(dev)->ao_buffer_bus_addr[buffer_index])
3100 return 0;
3101
3102 return 1;
3103 }
3104
3105 static int ao_stopped_by_error(struct comedi_device *dev,
3106 const struct comedi_cmd *cmd)
3107 {
3108 if (cmd->stop_src == TRIG_NONE)
3109 return 1;
3110 if (cmd->stop_src == TRIG_COUNT) {
3111 if (priv(dev)->ao_count)
3112 return 1;
3113 if (last_ao_dma_load_completed(dev) == 0)
3114 return 1;
3115 }
3116 return 0;
3117 }
3118
3119 static inline int ao_dma_needs_restart(struct comedi_device *dev,
3120 unsigned short dma_status)
3121 {
3122 if ((dma_status & PLX_DMA_DONE_BIT) == 0 ||
3123 (dma_status & PLX_DMA_EN_BIT) == 0)
3124 return 0;
3125 if (last_ao_dma_load_completed(dev))
3126 return 0;
3127
3128 return 1;
3129 }
3130
3131 static void restart_ao_dma(struct comedi_device *dev)
3132 {
3133 unsigned int dma_desc_bits;
3134
3135 dma_desc_bits =
3136 readl(priv(dev)->plx9080_iobase + PLX_DMA0_DESCRIPTOR_REG);
3137 dma_desc_bits &= ~PLX_END_OF_CHAIN_BIT;
3138 DEBUG_PRINT("restarting ao dma, descriptor reg 0x%x\n", dma_desc_bits);
3139 load_first_dma_descriptor(dev, 0, dma_desc_bits);
3140
3141 dma_start_sync(dev, 0);
3142 }
3143
3144 static void handle_ao_interrupt(struct comedi_device *dev,
3145 unsigned short status, unsigned int plx_status)
3146 {
3147 struct comedi_subdevice *s = dev->write_subdev;
3148 struct comedi_async *async;
3149 struct comedi_cmd *cmd;
3150 uint8_t dma0_status;
3151 unsigned long flags;
3152
3153 /* board might not support ao, in which case write_subdev is NULL */
3154 if (s == NULL)
3155 return;
3156 async = s->async;
3157 cmd = &async->cmd;
3158
3159 /* spin lock makes sure noone else changes plx dma control reg */
3160 spin_lock_irqsave(&dev->spinlock, flags);
3161 dma0_status = readb(priv(dev)->plx9080_iobase + PLX_DMA0_CS_REG);
3162 if (plx_status & ICS_DMA0_A) { /* dma chan 0 interrupt */
3163 if ((dma0_status & PLX_DMA_EN_BIT)
3164 && !(dma0_status & PLX_DMA_DONE_BIT))
3165 writeb(PLX_DMA_EN_BIT | PLX_CLEAR_DMA_INTR_BIT,
3166 priv(dev)->plx9080_iobase + PLX_DMA0_CS_REG);
3167 else
3168 writeb(PLX_CLEAR_DMA_INTR_BIT,
3169 priv(dev)->plx9080_iobase + PLX_DMA0_CS_REG);
3170 spin_unlock_irqrestore(&dev->spinlock, flags);
3171 DEBUG_PRINT("dma0 status 0x%x\n", dma0_status);
3172 if (dma0_status & PLX_DMA_EN_BIT) {
3173 load_ao_dma(dev, cmd);
3174 /* try to recover from dma end-of-chain event */
3175 if (ao_dma_needs_restart(dev, dma0_status))
3176 restart_ao_dma(dev);
3177 }
3178 DEBUG_PRINT(" cleared dma ch0 interrupt\n");
3179 } else
3180 spin_unlock_irqrestore(&dev->spinlock, flags);
3181
3182 if ((status & DAC_DONE_BIT)) {
3183 async->events |= COMEDI_CB_EOA;
3184 if (ao_stopped_by_error(dev, cmd))
3185 async->events |= COMEDI_CB_ERROR;
3186 DEBUG_PRINT("plx dma0 desc reg 0x%x\n",
3187 readl(priv(dev)->plx9080_iobase +
3188 PLX_DMA0_DESCRIPTOR_REG));
3189 DEBUG_PRINT("plx dma0 address reg 0x%x\n",
3190 readl(priv(dev)->plx9080_iobase +
3191 PLX_DMA0_PCI_ADDRESS_REG));
3192 }
3193 cfc_handle_events(dev, s);
3194 }
3195
3196 static irqreturn_t handle_interrupt(int irq, void *d)
3197 {
3198 struct comedi_device *dev = d;
3199 unsigned short status;
3200 uint32_t plx_status;
3201 uint32_t plx_bits;
3202
3203 plx_status = readl(priv(dev)->plx9080_iobase + PLX_INTRCS_REG);
3204 status = readw(priv(dev)->main_iobase + HW_STATUS_REG);
3205
3206 DEBUG_PRINT("cb_pcidas64: hw status 0x%x ", status);
3207 DEBUG_PRINT("plx status 0x%x\n", plx_status);
3208
3209 /* an interrupt before all the postconfig stuff gets done could
3210 * cause a NULL dereference if we continue through the
3211 * interrupt handler */
3212 if (dev->attached == 0) {
3213 DEBUG_PRINT("cb_pcidas64: premature interrupt, ignoring",
3214 status);
3215 return IRQ_HANDLED;
3216 }
3217 handle_ai_interrupt(dev, status, plx_status);
3218 handle_ao_interrupt(dev, status, plx_status);
3219
3220 /* clear possible plx9080 interrupt sources */
3221 if (plx_status & ICS_LDIA) { /* clear local doorbell interrupt */
3222 plx_bits = readl(priv(dev)->plx9080_iobase + PLX_DBR_OUT_REG);
3223 writel(plx_bits, priv(dev)->plx9080_iobase + PLX_DBR_OUT_REG);
3224 DEBUG_PRINT(" cleared local doorbell bits 0x%x\n", plx_bits);
3225 }
3226
3227 DEBUG_PRINT("exiting handler\n");
3228
3229 return IRQ_HANDLED;
3230 }
3231
3232 static void abort_dma(struct comedi_device *dev, unsigned int channel)
3233 {
3234 unsigned long flags;
3235
3236 /* spinlock for plx dma control/status reg */
3237 spin_lock_irqsave(&dev->spinlock, flags);
3238
3239 plx9080_abort_dma(priv(dev)->plx9080_iobase, channel);
3240
3241 spin_unlock_irqrestore(&dev->spinlock, flags);
3242 }
3243
3244 static int ai_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
3245 {
3246 unsigned long flags;
3247
3248 spin_lock_irqsave(&dev->spinlock, flags);
3249 if (priv(dev)->ai_cmd_running == 0) {
3250 spin_unlock_irqrestore(&dev->spinlock, flags);
3251 return 0;
3252 }
3253 priv(dev)->ai_cmd_running = 0;
3254 spin_unlock_irqrestore(&dev->spinlock, flags);
3255
3256 disable_ai_pacing(dev);
3257
3258 abort_dma(dev, 1);
3259
3260 DEBUG_PRINT("ai canceled\n");
3261 return 0;
3262 }
3263
3264 static int ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
3265 struct comedi_insn *insn, unsigned int *data)
3266 {
3267 int chan = CR_CHAN(insn->chanspec);
3268 int range = CR_RANGE(insn->chanspec);
3269
3270 /* do some initializing */
3271 writew(0, priv(dev)->main_iobase + DAC_CONTROL0_REG);
3272
3273 /* set range */
3274 set_dac_range_bits(dev, &priv(dev)->dac_control1_bits, chan, range);
3275 writew(priv(dev)->dac_control1_bits,
3276 priv(dev)->main_iobase + DAC_CONTROL1_REG);
3277
3278 /* write to channel */
3279 if (board(dev)->layout == LAYOUT_4020) {
3280 writew(data[0] & 0xff,
3281 priv(dev)->main_iobase + dac_lsb_4020_reg(chan));
3282 writew((data[0] >> 8) & 0xf,
3283 priv(dev)->main_iobase + dac_msb_4020_reg(chan));
3284 } else {
3285 writew(data[0], priv(dev)->main_iobase + dac_convert_reg(chan));
3286 }
3287
3288 /* remember output value */
3289 priv(dev)->ao_value[chan] = data[0];
3290
3291 return 1;
3292 }
3293
3294 static int ao_readback_insn(struct comedi_device *dev,
3295 struct comedi_subdevice *s,
3296 struct comedi_insn *insn, unsigned int *data)
3297 {
3298 data[0] = priv(dev)->ao_value[CR_CHAN(insn->chanspec)];
3299
3300 return 1;
3301 }
3302
3303 static void set_dac_control0_reg(struct comedi_device *dev,
3304 const struct comedi_cmd *cmd)
3305 {
3306 unsigned int bits = DAC_ENABLE_BIT | WAVEFORM_GATE_LEVEL_BIT |
3307 WAVEFORM_GATE_ENABLE_BIT | WAVEFORM_GATE_SELECT_BIT;
3308
3309 if (cmd->start_src == TRIG_EXT) {
3310 bits |= WAVEFORM_TRIG_EXT_BITS;
3311 if (cmd->start_arg & CR_INVERT)
3312 bits |= WAVEFORM_TRIG_FALLING_BIT;
3313 } else {
3314 bits |= WAVEFORM_TRIG_SOFT_BITS;
3315 }
3316 if (cmd->scan_begin_src == TRIG_EXT) {
3317 bits |= DAC_EXT_UPDATE_ENABLE_BIT;
3318 if (cmd->scan_begin_arg & CR_INVERT)
3319 bits |= DAC_EXT_UPDATE_FALLING_BIT;
3320 }
3321 writew(bits, priv(dev)->main_iobase + DAC_CONTROL0_REG);
3322 }
3323
3324 static void set_dac_control1_reg(struct comedi_device *dev,
3325 const struct comedi_cmd *cmd)
3326 {
3327 int i;
3328
3329 for (i = 0; i < cmd->chanlist_len; i++) {
3330 int channel, range;
3331
3332 channel = CR_CHAN(cmd->chanlist[i]);
3333 range = CR_RANGE(cmd->chanlist[i]);
3334 set_dac_range_bits(dev, &priv(dev)->dac_control1_bits, channel,
3335 range);
3336 }
3337 priv(dev)->dac_control1_bits |= DAC_SW_GATE_BIT;
3338 writew(priv(dev)->dac_control1_bits,
3339 priv(dev)->main_iobase + DAC_CONTROL1_REG);
3340 }
3341
3342 static void set_dac_select_reg(struct comedi_device *dev,
3343 const struct comedi_cmd *cmd)
3344 {
3345 uint16_t bits;
3346 unsigned int first_channel, last_channel;
3347
3348 first_channel = CR_CHAN(cmd->chanlist[0]);
3349 last_channel = CR_CHAN(cmd->chanlist[cmd->chanlist_len - 1]);
3350 if (last_channel < first_channel)
3351 comedi_error(dev, "bug! last ao channel < first ao channel");
3352
3353 bits = (first_channel & 0x7) | (last_channel & 0x7) << 3;
3354
3355 writew(bits, priv(dev)->main_iobase + DAC_SELECT_REG);
3356 }
3357
3358 static void set_dac_interval_regs(struct comedi_device *dev,
3359 const struct comedi_cmd *cmd)
3360 {
3361 unsigned int divisor;
3362
3363 if (cmd->scan_begin_src != TRIG_TIMER)
3364 return;
3365
3366 divisor = get_ao_divisor(cmd->scan_begin_arg, cmd->flags);
3367 if (divisor > max_counter_value) {
3368 comedi_error(dev, "bug! ao divisor too big");
3369 divisor = max_counter_value;
3370 }
3371 writew(divisor & 0xffff,
3372 priv(dev)->main_iobase + DAC_SAMPLE_INTERVAL_LOWER_REG);
3373 writew((divisor >> 16) & 0xff,
3374 priv(dev)->main_iobase + DAC_SAMPLE_INTERVAL_UPPER_REG);
3375 }
3376
3377 static unsigned int load_ao_dma_buffer(struct comedi_device *dev,
3378 const struct comedi_cmd *cmd)
3379 {
3380 unsigned int num_bytes, buffer_index, prev_buffer_index;
3381 unsigned int next_bits;
3382
3383 buffer_index = priv(dev)->ao_dma_index;
3384 prev_buffer_index = prev_ao_dma_index(dev);
3385
3386 DEBUG_PRINT("attempting to load ao buffer %i (0x%x)\n", buffer_index,
3387 priv(dev)->ao_buffer_bus_addr[buffer_index]);
3388
3389 num_bytes = comedi_buf_read_n_available(dev->write_subdev->async);
3390 if (num_bytes > DMA_BUFFER_SIZE)
3391 num_bytes = DMA_BUFFER_SIZE;
3392 if (cmd->stop_src == TRIG_COUNT && num_bytes > priv(dev)->ao_count)
3393 num_bytes = priv(dev)->ao_count;
3394 num_bytes -= num_bytes % bytes_in_sample;
3395
3396 if (num_bytes == 0)
3397 return 0;
3398
3399 DEBUG_PRINT("loading %i bytes\n", num_bytes);
3400
3401 num_bytes = cfc_read_array_from_buffer(dev->write_subdev,
3402 priv(dev)->
3403 ao_buffer[buffer_index],
3404 num_bytes);
3405 priv(dev)->ao_dma_desc[buffer_index].transfer_size =
3406 cpu_to_le32(num_bytes);
3407 /* set end of chain bit so we catch underruns */
3408 next_bits = le32_to_cpu(priv(dev)->ao_dma_desc[buffer_index].next);
3409 next_bits |= PLX_END_OF_CHAIN_BIT;
3410 priv(dev)->ao_dma_desc[buffer_index].next = cpu_to_le32(next_bits);
3411 /* clear end of chain bit on previous buffer now that we have set it
3412 * for the last buffer */
3413 next_bits = le32_to_cpu(priv(dev)->ao_dma_desc[prev_buffer_index].next);
3414 next_bits &= ~PLX_END_OF_CHAIN_BIT;
3415 priv(dev)->ao_dma_desc[prev_buffer_index].next = cpu_to_le32(next_bits);
3416
3417 priv(dev)->ao_dma_index = (buffer_index + 1) % AO_DMA_RING_COUNT;
3418 priv(dev)->ao_count -= num_bytes;
3419
3420 return num_bytes;
3421 }
3422
3423 static void load_ao_dma(struct comedi_device *dev, const struct comedi_cmd *cmd)
3424 {
3425 unsigned int num_bytes;
3426 unsigned int next_transfer_addr;
3427 void __iomem *pci_addr_reg =
3428 priv(dev)->plx9080_iobase + PLX_DMA0_PCI_ADDRESS_REG;
3429 unsigned int buffer_index;
3430
3431 do {
3432 buffer_index = priv(dev)->ao_dma_index;
3433 /* don't overwrite data that hasn't been transferred yet */
3434 next_transfer_addr = readl(pci_addr_reg);
3435 if (next_transfer_addr >=
3436 priv(dev)->ao_buffer_bus_addr[buffer_index]
3437 && next_transfer_addr <
3438 priv(dev)->ao_buffer_bus_addr[buffer_index] +
3439 DMA_BUFFER_SIZE)
3440 return;
3441 num_bytes = load_ao_dma_buffer(dev, cmd);
3442 } while (num_bytes >= DMA_BUFFER_SIZE);
3443 }
3444
3445 static int prep_ao_dma(struct comedi_device *dev, const struct comedi_cmd *cmd)
3446 {
3447 unsigned int num_bytes;
3448 int i;
3449
3450 /* clear queue pointer too, since external queue has
3451 * weird interactions with ao fifo */
3452 writew(0, priv(dev)->main_iobase + ADC_QUEUE_CLEAR_REG);
3453 writew(0, priv(dev)->main_iobase + DAC_BUFFER_CLEAR_REG);
3454
3455 num_bytes = (DAC_FIFO_SIZE / 2) * bytes_in_sample;
3456 if (cmd->stop_src == TRIG_COUNT &&
3457 num_bytes / bytes_in_sample > priv(dev)->ao_count)
3458 num_bytes = priv(dev)->ao_count * bytes_in_sample;
3459 num_bytes = cfc_read_array_from_buffer(dev->write_subdev,
3460 priv(dev)->ao_bounce_buffer,
3461 num_bytes);
3462 for (i = 0; i < num_bytes / bytes_in_sample; i++) {
3463 writew(priv(dev)->ao_bounce_buffer[i],
3464 priv(dev)->main_iobase + DAC_FIFO_REG);
3465 }
3466 priv(dev)->ao_count -= num_bytes / bytes_in_sample;
3467 if (cmd->stop_src == TRIG_COUNT && priv(dev)->ao_count == 0)
3468 return 0;
3469 num_bytes = load_ao_dma_buffer(dev, cmd);
3470 if (num_bytes == 0)
3471 return -1;
3472 if (num_bytes >= DMA_BUFFER_SIZE) ;
3473 load_ao_dma(dev, cmd);
3474
3475 dma_start_sync(dev, 0);
3476
3477 return 0;
3478 }
3479
3480 static inline int external_ai_queue_in_use(struct comedi_device *dev)
3481 {
3482 if (dev->read_subdev->busy)
3483 return 0;
3484 if (board(dev)->layout == LAYOUT_4020)
3485 return 0;
3486 else if (use_internal_queue_6xxx(&dev->read_subdev->async->cmd))
3487 return 0;
3488 return 1;
3489 }
3490
3491 static int ao_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
3492 {
3493 struct comedi_cmd *cmd = &s->async->cmd;
3494
3495 if (external_ai_queue_in_use(dev)) {
3496 warn_external_queue(dev);
3497 return -EBUSY;
3498 }
3499 /* disable analog output system during setup */
3500 writew(0x0, priv(dev)->main_iobase + DAC_CONTROL0_REG);
3501
3502 priv(dev)->ao_dma_index = 0;
3503 priv(dev)->ao_count = cmd->stop_arg * cmd->chanlist_len;
3504
3505 set_dac_select_reg(dev, cmd);
3506 set_dac_interval_regs(dev, cmd);
3507 load_first_dma_descriptor(dev, 0, priv(dev)->ao_dma_desc_bus_addr |
3508 PLX_DESC_IN_PCI_BIT | PLX_INTR_TERM_COUNT);
3509
3510 set_dac_control1_reg(dev, cmd);
3511 s->async->inttrig = ao_inttrig;
3512
3513 return 0;
3514 }
3515
3516 static int ao_inttrig(struct comedi_device *dev, struct comedi_subdevice *s,
3517 unsigned int trig_num)
3518 {
3519 struct comedi_cmd *cmd = &s->async->cmd;
3520 int retval;
3521
3522 if (trig_num != 0)
3523 return -EINVAL;
3524
3525 retval = prep_ao_dma(dev, cmd);
3526 if (retval < 0)
3527 return -EPIPE;
3528
3529 set_dac_control0_reg(dev, cmd);
3530
3531 if (cmd->start_src == TRIG_INT)
3532 writew(0, priv(dev)->main_iobase + DAC_START_REG);
3533
3534 s->async->inttrig = NULL;
3535
3536 return 0;
3537 }
3538
3539 static int ao_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s,
3540 struct comedi_cmd *cmd)
3541 {
3542 int err = 0;
3543 int tmp;
3544 unsigned int tmp_arg;
3545 int i;
3546
3547 /* step 1: make sure trigger sources are trivially valid */
3548
3549 tmp = cmd->start_src;
3550 cmd->start_src &= TRIG_INT | TRIG_EXT;
3551 if (!cmd->start_src || tmp != cmd->start_src)
3552 err++;
3553
3554 tmp = cmd->scan_begin_src;
3555 cmd->scan_begin_src &= TRIG_TIMER | TRIG_EXT;
3556 if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
3557 err++;
3558
3559 tmp = cmd->convert_src;
3560 cmd->convert_src &= TRIG_NOW;
3561 if (!cmd->convert_src || tmp != cmd->convert_src)
3562 err++;
3563
3564 tmp = cmd->scan_end_src;
3565 cmd->scan_end_src &= TRIG_COUNT;
3566 if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
3567 err++;
3568
3569 tmp = cmd->stop_src;
3570 cmd->stop_src &= TRIG_NONE;
3571 if (!cmd->stop_src || tmp != cmd->stop_src)
3572 err++;
3573
3574 if (err)
3575 return 1;
3576
3577 /* step 2: make sure trigger sources are unique and mutually compatible */
3578
3579 /* uniqueness check */
3580 if (cmd->start_src != TRIG_INT && cmd->start_src != TRIG_EXT)
3581 err++;
3582 if (cmd->scan_begin_src != TRIG_TIMER &&
3583 cmd->scan_begin_src != TRIG_EXT)
3584 err++;
3585
3586 /* compatibility check */
3587 if (cmd->convert_src == TRIG_EXT && cmd->scan_begin_src == TRIG_TIMER)
3588 err++;
3589 if (cmd->stop_src != TRIG_COUNT &&
3590 cmd->stop_src != TRIG_NONE && cmd->stop_src != TRIG_EXT)
3591 err++;
3592
3593 if (err)
3594 return 2;
3595
3596 /* step 3: make sure arguments are trivially compatible */
3597
3598 if (cmd->scan_begin_src == TRIG_TIMER) {
3599 if (cmd->scan_begin_arg < board(dev)->ao_scan_speed) {
3600 cmd->scan_begin_arg = board(dev)->ao_scan_speed;
3601 err++;
3602 }
3603 if (get_ao_divisor(cmd->scan_begin_arg,
3604 cmd->flags) > max_counter_value) {
3605 cmd->scan_begin_arg =
3606 (max_counter_value + 2) * TIMER_BASE;
3607 err++;
3608 }
3609 }
3610
3611 if (!cmd->chanlist_len) {
3612 cmd->chanlist_len = 1;
3613 err++;
3614 }
3615 if (cmd->scan_end_arg != cmd->chanlist_len) {
3616 cmd->scan_end_arg = cmd->chanlist_len;
3617 err++;
3618 }
3619
3620 if (err)
3621 return 3;
3622
3623 /* step 4: fix up any arguments */
3624
3625 if (cmd->scan_begin_src == TRIG_TIMER) {
3626 tmp_arg = cmd->scan_begin_arg;
3627 cmd->scan_begin_arg =
3628 get_divisor(cmd->scan_begin_arg, cmd->flags) * TIMER_BASE;
3629 if (tmp_arg != cmd->scan_begin_arg)
3630 err++;
3631 }
3632
3633 if (err)
3634 return 4;
3635
3636 if (cmd->chanlist) {
3637 unsigned int first_channel = CR_CHAN(cmd->chanlist[0]);
3638 for (i = 1; i < cmd->chanlist_len; i++) {
3639 if (CR_CHAN(cmd->chanlist[i]) != first_channel + i) {
3640 comedi_error(dev,
3641 "chanlist must use consecutive channels");
3642 err++;
3643 break;
3644 }
3645 }
3646 }
3647
3648 if (err)
3649 return 5;
3650
3651 return 0;
3652 }
3653
3654 static int ao_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
3655 {
3656 writew(0x0, priv(dev)->main_iobase + DAC_CONTROL0_REG);
3657 abort_dma(dev, 0);
3658 return 0;
3659 }
3660
3661 static int dio_callback(int dir, int port, int data, unsigned long arg)
3662 {
3663 void __iomem *iobase = (void __iomem *)arg;
3664 if (dir) {
3665 writeb(data, iobase + port);
3666 DEBUG_PRINT("wrote 0x%x to port %i\n", data, port);
3667 return 0;
3668 } else {
3669 return readb(iobase + port);
3670 }
3671 }
3672
3673 static int dio_callback_4020(int dir, int port, int data, unsigned long arg)
3674 {
3675 void __iomem *iobase = (void __iomem *)arg;
3676 if (dir) {
3677 writew(data, iobase + 2 * port);
3678 return 0;
3679 } else {
3680 return readw(iobase + 2 * port);
3681 }
3682 }
3683
3684 static int di_rbits(struct comedi_device *dev, struct comedi_subdevice *s,
3685 struct comedi_insn *insn, unsigned int *data)
3686 {
3687 unsigned int bits;
3688
3689 bits = readb(priv(dev)->dio_counter_iobase + DI_REG);
3690 bits &= 0xf;
3691 data[1] = bits;
3692 data[0] = 0;
3693
3694 return 2;
3695 }
3696
3697 static int do_wbits(struct comedi_device *dev, struct comedi_subdevice *s,
3698 struct comedi_insn *insn, unsigned int *data)
3699 {
3700 data[0] &= 0xf;
3701 /* zero bits we are going to change */
3702 s->state &= ~data[0];
3703 /* set new bits */
3704 s->state |= data[0] & data[1];
3705
3706 writeb(s->state, priv(dev)->dio_counter_iobase + DO_REG);
3707
3708 data[1] = s->state;
3709
3710 return 2;
3711 }
3712
3713 static int dio_60xx_config_insn(struct comedi_device *dev,
3714 struct comedi_subdevice *s,
3715 struct comedi_insn *insn, unsigned int *data)
3716 {
3717 unsigned int mask;
3718
3719 mask = 1 << CR_CHAN(insn->chanspec);
3720
3721 switch (data[0]) {
3722 case INSN_CONFIG_DIO_INPUT:
3723 s->io_bits &= ~mask;
3724 break;
3725 case INSN_CONFIG_DIO_OUTPUT:
3726 s->io_bits |= mask;
3727 break;
3728 case INSN_CONFIG_DIO_QUERY:
3729 data[1] = (s->io_bits & mask) ? COMEDI_OUTPUT : COMEDI_INPUT;
3730 return 2;
3731 default:
3732 return -EINVAL;
3733 }
3734
3735 writeb(s->io_bits,
3736 priv(dev)->dio_counter_iobase + DIO_DIRECTION_60XX_REG);
3737
3738 return 1;
3739 }
3740
3741 static int dio_60xx_wbits(struct comedi_device *dev, struct comedi_subdevice *s,
3742 struct comedi_insn *insn, unsigned int *data)
3743 {
3744 if (data[0]) {
3745 s->state &= ~data[0];
3746 s->state |= (data[0] & data[1]);
3747 writeb(s->state,
3748 priv(dev)->dio_counter_iobase + DIO_DATA_60XX_REG);
3749 }
3750
3751 data[1] = readb(priv(dev)->dio_counter_iobase + DIO_DATA_60XX_REG);
3752
3753 return 2;
3754 }
3755
3756 static void caldac_write(struct comedi_device *dev, unsigned int channel,
3757 unsigned int value)
3758 {
3759 priv(dev)->caldac_state[channel] = value;
3760
3761 switch (board(dev)->layout) {
3762 case LAYOUT_60XX:
3763 case LAYOUT_64XX:
3764 caldac_8800_write(dev, channel, value);
3765 break;
3766 case LAYOUT_4020:
3767 caldac_i2c_write(dev, channel, value);
3768 break;
3769 default:
3770 break;
3771 }
3772 }
3773
3774 static int calib_write_insn(struct comedi_device *dev,
3775 struct comedi_subdevice *s,
3776 struct comedi_insn *insn, unsigned int *data)
3777 {
3778 int channel = CR_CHAN(insn->chanspec);
3779
3780 /* return immediately if setting hasn't changed, since
3781 * programming these things is slow */
3782 if (priv(dev)->caldac_state[channel] == data[0])
3783 return 1;
3784
3785 caldac_write(dev, channel, data[0]);
3786
3787 return 1;
3788 }
3789
3790 static int calib_read_insn(struct comedi_device *dev,
3791 struct comedi_subdevice *s, struct comedi_insn *insn,
3792 unsigned int *data)
3793 {
3794 unsigned int channel = CR_CHAN(insn->chanspec);
3795
3796 data[0] = priv(dev)->caldac_state[channel];
3797
3798 return 1;
3799 }
3800
3801 static void ad8402_write(struct comedi_device *dev, unsigned int channel,
3802 unsigned int value)
3803 {
3804 static const int bitstream_length = 10;
3805 unsigned int bit, register_bits;
3806 unsigned int bitstream = ((channel & 0x3) << 8) | (value & 0xff);
3807 static const int ad8402_udelay = 1;
3808
3809 priv(dev)->ad8402_state[channel] = value;
3810
3811 register_bits = SELECT_8402_64XX_BIT;
3812 udelay(ad8402_udelay);
3813 writew(register_bits, priv(dev)->main_iobase + CALIBRATION_REG);
3814
3815 for (bit = 1 << (bitstream_length - 1); bit; bit >>= 1) {
3816 if (bitstream & bit)
3817 register_bits |= SERIAL_DATA_IN_BIT;
3818 else
3819 register_bits &= ~SERIAL_DATA_IN_BIT;
3820 udelay(ad8402_udelay);
3821 writew(register_bits, priv(dev)->main_iobase + CALIBRATION_REG);
3822 udelay(ad8402_udelay);
3823 writew(register_bits | SERIAL_CLOCK_BIT,
3824 priv(dev)->main_iobase + CALIBRATION_REG);
3825 }
3826
3827 udelay(ad8402_udelay);
3828 writew(0, priv(dev)->main_iobase + CALIBRATION_REG);
3829 }
3830
3831 /* for pci-das6402/16, channel 0 is analog input gain and channel 1 is offset */
3832 static int ad8402_write_insn(struct comedi_device *dev,
3833 struct comedi_subdevice *s,
3834 struct comedi_insn *insn, unsigned int *data)
3835 {
3836 int channel = CR_CHAN(insn->chanspec);
3837
3838 /* return immediately if setting hasn't changed, since
3839 * programming these things is slow */
3840 if (priv(dev)->ad8402_state[channel] == data[0])
3841 return 1;
3842
3843 priv(dev)->ad8402_state[channel] = data[0];
3844
3845 ad8402_write(dev, channel, data[0]);
3846
3847 return 1;
3848 }
3849
3850 static int ad8402_read_insn(struct comedi_device *dev,
3851 struct comedi_subdevice *s,
3852 struct comedi_insn *insn, unsigned int *data)
3853 {
3854 unsigned int channel = CR_CHAN(insn->chanspec);
3855
3856 data[0] = priv(dev)->ad8402_state[channel];
3857
3858 return 1;
3859 }
3860
3861 static uint16_t read_eeprom(struct comedi_device *dev, uint8_t address)
3862 {
3863 static const int bitstream_length = 11;
3864 static const int read_command = 0x6;
3865 unsigned int bitstream = (read_command << 8) | address;
3866 unsigned int bit;
3867 void __iomem * const plx_control_addr =
3868 priv(dev)->plx9080_iobase + PLX_CONTROL_REG;
3869 uint16_t value;
3870 static const int value_length = 16;
3871 static const int eeprom_udelay = 1;
3872
3873 udelay(eeprom_udelay);
3874 priv(dev)->plx_control_bits &= ~CTL_EE_CLK & ~CTL_EE_CS;
3875 /* make sure we don't send anything to the i2c bus on 4020 */
3876 priv(dev)->plx_control_bits |= CTL_USERO;
3877 writel(priv(dev)->plx_control_bits, plx_control_addr);
3878 /* activate serial eeprom */
3879 udelay(eeprom_udelay);
3880 priv(dev)->plx_control_bits |= CTL_EE_CS;
3881 writel(priv(dev)->plx_control_bits, plx_control_addr);
3882
3883 /* write read command and desired memory address */
3884 for (bit = 1 << (bitstream_length - 1); bit; bit >>= 1) {
3885 /* set bit to be written */
3886 udelay(eeprom_udelay);
3887 if (bitstream & bit)
3888 priv(dev)->plx_control_bits |= CTL_EE_W;
3889 else
3890 priv(dev)->plx_control_bits &= ~CTL_EE_W;
3891 writel(priv(dev)->plx_control_bits, plx_control_addr);
3892 /* clock in bit */
3893 udelay(eeprom_udelay);
3894 priv(dev)->plx_control_bits |= CTL_EE_CLK;
3895 writel(priv(dev)->plx_control_bits, plx_control_addr);
3896 udelay(eeprom_udelay);
3897 priv(dev)->plx_control_bits &= ~CTL_EE_CLK;
3898 writel(priv(dev)->plx_control_bits, plx_control_addr);
3899 }
3900 /* read back value from eeprom memory location */
3901 value = 0;
3902 for (bit = 1 << (value_length - 1); bit; bit >>= 1) {
3903 /* clock out bit */
3904 udelay(eeprom_udelay);
3905 priv(dev)->plx_control_bits |= CTL_EE_CLK;
3906 writel(priv(dev)->plx_control_bits, plx_control_addr);
3907 udelay(eeprom_udelay);
3908 priv(dev)->plx_control_bits &= ~CTL_EE_CLK;
3909 writel(priv(dev)->plx_control_bits, plx_control_addr);
3910 udelay(eeprom_udelay);
3911 if (readl(plx_control_addr) & CTL_EE_R)
3912 value |= bit;
3913 }
3914
3915 /* deactivate eeprom serial input */
3916 udelay(eeprom_udelay);
3917 priv(dev)->plx_control_bits &= ~CTL_EE_CS;
3918 writel(priv(dev)->plx_control_bits, plx_control_addr);
3919
3920 return value;
3921 }
3922
3923 static int eeprom_read_insn(struct comedi_device *dev,
3924 struct comedi_subdevice *s,
3925 struct comedi_insn *insn, unsigned int *data)
3926 {
3927 data[0] = read_eeprom(dev, CR_CHAN(insn->chanspec));
3928
3929 return 1;
3930 }
3931
3932 /* utility function that rounds desired timing to an achievable time, and
3933 * sets cmd members appropriately.
3934 * adc paces conversions from master clock by dividing by (x + 3) where x is 24 bit number
3935 */
3936 static void check_adc_timing(struct comedi_device *dev, struct comedi_cmd *cmd)
3937 {
3938 unsigned int convert_divisor = 0, scan_divisor;
3939 static const int min_convert_divisor = 3;
3940 static const int max_convert_divisor =
3941 max_counter_value + min_convert_divisor;
3942 static const int min_scan_divisor_4020 = 2;
3943 unsigned long long max_scan_divisor, min_scan_divisor;
3944
3945 if (cmd->convert_src == TRIG_TIMER) {
3946 if (board(dev)->layout == LAYOUT_4020) {
3947 cmd->convert_arg = 0;
3948 } else {
3949 convert_divisor =
3950 get_divisor(cmd->convert_arg, cmd->flags);
3951 if (convert_divisor > max_convert_divisor)
3952 convert_divisor = max_convert_divisor;
3953 if (convert_divisor < min_convert_divisor)
3954 convert_divisor = min_convert_divisor;
3955 cmd->convert_arg = convert_divisor * TIMER_BASE;
3956 }
3957 } else if (cmd->convert_src == TRIG_NOW)
3958 cmd->convert_arg = 0;
3959
3960 if (cmd->scan_begin_src == TRIG_TIMER) {
3961 scan_divisor = get_divisor(cmd->scan_begin_arg, cmd->flags);
3962 if (cmd->convert_src == TRIG_TIMER) {
3963 /* XXX check for integer overflows */
3964 min_scan_divisor = convert_divisor * cmd->chanlist_len;
3965 max_scan_divisor =
3966 (convert_divisor * cmd->chanlist_len - 1) +
3967 max_counter_value;
3968 } else {
3969 min_scan_divisor = min_scan_divisor_4020;
3970 max_scan_divisor = max_counter_value + min_scan_divisor;
3971 }
3972 if (scan_divisor > max_scan_divisor)
3973 scan_divisor = max_scan_divisor;
3974 if (scan_divisor < min_scan_divisor)
3975 scan_divisor = min_scan_divisor;
3976 cmd->scan_begin_arg = scan_divisor * TIMER_BASE;
3977 }
3978
3979 return;
3980 }
3981
3982 /* Gets nearest achievable timing given master clock speed, does not
3983 * take into account possible minimum/maximum divisor values. Used
3984 * by other timing checking functions. */
3985 static unsigned int get_divisor(unsigned int ns, unsigned int flags)
3986 {
3987 unsigned int divisor;
3988
3989 switch (flags & TRIG_ROUND_MASK) {
3990 case TRIG_ROUND_UP:
3991 divisor = (ns + TIMER_BASE - 1) / TIMER_BASE;
3992 break;
3993 case TRIG_ROUND_DOWN:
3994 divisor = ns / TIMER_BASE;
3995 break;
3996 case TRIG_ROUND_NEAREST:
3997 default:
3998 divisor = (ns + TIMER_BASE / 2) / TIMER_BASE;
3999 break;
4000 }
4001 return divisor;
4002 }
4003
4004 static unsigned int get_ao_divisor(unsigned int ns, unsigned int flags)
4005 {
4006 return get_divisor(ns, flags) - 2;
4007 }
4008
4009 /* adjusts the size of hardware fifo (which determines block size for dma xfers) */
4010 static int set_ai_fifo_size(struct comedi_device *dev, unsigned int num_samples)
4011 {
4012 unsigned int num_fifo_entries;
4013 int retval;
4014 const struct hw_fifo_info *const fifo = board(dev)->ai_fifo;
4015
4016 num_fifo_entries = num_samples / fifo->sample_packing_ratio;
4017
4018 retval = set_ai_fifo_segment_length(dev,
4019 num_fifo_entries /
4020 fifo->num_segments);
4021 if (retval < 0)
4022 return retval;
4023
4024 num_samples = retval * fifo->num_segments * fifo->sample_packing_ratio;
4025
4026 DEBUG_PRINT("set hardware fifo size to %i\n", num_samples);
4027
4028 return num_samples;
4029 }
4030
4031 /* query length of fifo */
4032 static unsigned int ai_fifo_size(struct comedi_device *dev)
4033 {
4034 return priv(dev)->ai_fifo_segment_length *
4035 board(dev)->ai_fifo->num_segments *
4036 board(dev)->ai_fifo->sample_packing_ratio;
4037 }
4038
4039 static int set_ai_fifo_segment_length(struct comedi_device *dev,
4040 unsigned int num_entries)
4041 {
4042 static const int increment_size = 0x100;
4043 const struct hw_fifo_info *const fifo = board(dev)->ai_fifo;
4044 unsigned int num_increments;
4045 uint16_t bits;
4046
4047 if (num_entries < increment_size)
4048 num_entries = increment_size;
4049 if (num_entries > fifo->max_segment_length)
4050 num_entries = fifo->max_segment_length;
4051
4052 /* 1 == 256 entries, 2 == 512 entries, etc */
4053 num_increments = (num_entries + increment_size / 2) / increment_size;
4054
4055 bits = (~(num_increments - 1)) & fifo->fifo_size_reg_mask;
4056 priv(dev)->fifo_size_bits &= ~fifo->fifo_size_reg_mask;
4057 priv(dev)->fifo_size_bits |= bits;
4058 writew(priv(dev)->fifo_size_bits,
4059 priv(dev)->main_iobase + FIFO_SIZE_REG);
4060
4061 priv(dev)->ai_fifo_segment_length = num_increments * increment_size;
4062
4063 DEBUG_PRINT("set hardware fifo segment length to %i\n",
4064 priv(dev)->ai_fifo_segment_length);
4065
4066 return priv(dev)->ai_fifo_segment_length;
4067 }
4068
4069 /* pci-6025 8800 caldac:
4070 * address 0 == dac channel 0 offset
4071 * address 1 == dac channel 0 gain
4072 * address 2 == dac channel 1 offset
4073 * address 3 == dac channel 1 gain
4074 * address 4 == fine adc offset
4075 * address 5 == coarse adc offset
4076 * address 6 == coarse adc gain
4077 * address 7 == fine adc gain
4078 */
4079 /* pci-6402/16 uses all 8 channels for dac:
4080 * address 0 == dac channel 0 fine gain
4081 * address 1 == dac channel 0 coarse gain
4082 * address 2 == dac channel 0 coarse offset
4083 * address 3 == dac channel 1 coarse offset
4084 * address 4 == dac channel 1 fine gain
4085 * address 5 == dac channel 1 coarse gain
4086 * address 6 == dac channel 0 fine offset
4087 * address 7 == dac channel 1 fine offset
4088 */
4089
4090 static int caldac_8800_write(struct comedi_device *dev, unsigned int address,
4091 uint8_t value)
4092 {
4093 static const int num_caldac_channels = 8;
4094 static const int bitstream_length = 11;
4095 unsigned int bitstream = ((address & 0x7) << 8) | value;
4096 unsigned int bit, register_bits;
4097 static const int caldac_8800_udelay = 1;
4098
4099 if (address >= num_caldac_channels) {
4100 comedi_error(dev, "illegal caldac channel");
4101 return -1;
4102 }
4103 for (bit = 1 << (bitstream_length - 1); bit; bit >>= 1) {
4104 register_bits = 0;
4105 if (bitstream & bit)
4106 register_bits |= SERIAL_DATA_IN_BIT;
4107 udelay(caldac_8800_udelay);
4108 writew(register_bits, priv(dev)->main_iobase + CALIBRATION_REG);
4109 register_bits |= SERIAL_CLOCK_BIT;
4110 udelay(caldac_8800_udelay);
4111 writew(register_bits, priv(dev)->main_iobase + CALIBRATION_REG);
4112 }
4113 udelay(caldac_8800_udelay);
4114 writew(SELECT_8800_BIT, priv(dev)->main_iobase + CALIBRATION_REG);
4115 udelay(caldac_8800_udelay);
4116 writew(0, priv(dev)->main_iobase + CALIBRATION_REG);
4117 udelay(caldac_8800_udelay);
4118 return 0;
4119 }
4120
4121 /* 4020 caldacs */
4122 static int caldac_i2c_write(struct comedi_device *dev,
4123 unsigned int caldac_channel, unsigned int value)
4124 {
4125 uint8_t serial_bytes[3];
4126 uint8_t i2c_addr;
4127 enum pointer_bits {
4128 /* manual has gain and offset bits switched */
4129 OFFSET_0_2 = 0x1,
4130 GAIN_0_2 = 0x2,
4131 OFFSET_1_3 = 0x4,
4132 GAIN_1_3 = 0x8,
4133 };
4134 enum data_bits {
4135 NOT_CLEAR_REGISTERS = 0x20,
4136 };
4137
4138 switch (caldac_channel) {
4139 case 0: /* chan 0 offset */
4140 i2c_addr = CALDAC0_I2C_ADDR;
4141 serial_bytes[0] = OFFSET_0_2;
4142 break;
4143 case 1: /* chan 1 offset */
4144 i2c_addr = CALDAC0_I2C_ADDR;
4145 serial_bytes[0] = OFFSET_1_3;
4146 break;
4147 case 2: /* chan 2 offset */
4148 i2c_addr = CALDAC1_I2C_ADDR;
4149 serial_bytes[0] = OFFSET_0_2;
4150 break;
4151 case 3: /* chan 3 offset */
4152 i2c_addr = CALDAC1_I2C_ADDR;
4153 serial_bytes[0] = OFFSET_1_3;
4154 break;
4155 case 4: /* chan 0 gain */
4156 i2c_addr = CALDAC0_I2C_ADDR;
4157 serial_bytes[0] = GAIN_0_2;
4158 break;
4159 case 5: /* chan 1 gain */
4160 i2c_addr = CALDAC0_I2C_ADDR;
4161 serial_bytes[0] = GAIN_1_3;
4162 break;
4163 case 6: /* chan 2 gain */
4164 i2c_addr = CALDAC1_I2C_ADDR;
4165 serial_bytes[0] = GAIN_0_2;
4166 break;
4167 case 7: /* chan 3 gain */
4168 i2c_addr = CALDAC1_I2C_ADDR;
4169 serial_bytes[0] = GAIN_1_3;
4170 break;
4171 default:
4172 comedi_error(dev, "invalid caldac channel\n");
4173 return -1;
4174 break;
4175 }
4176 serial_bytes[1] = NOT_CLEAR_REGISTERS | ((value >> 8) & 0xf);
4177 serial_bytes[2] = value & 0xff;
4178 i2c_write(dev, i2c_addr, serial_bytes, 3);
4179 return 0;
4180 }
4181
4182 /* Their i2c requires a huge delay on setting clock or data high for some reason */
4183 static const int i2c_high_udelay = 1000;
4184 static const int i2c_low_udelay = 10;
4185
4186 /* set i2c data line high or low */
4187 static void i2c_set_sda(struct comedi_device *dev, int state)
4188 {
4189 static const int data_bit = CTL_EE_W;
4190 void __iomem *plx_control_addr = priv(dev)->plx9080_iobase +
4191 PLX_CONTROL_REG;
4192
4193 if (state) {
4194 /* set data line high */
4195 priv(dev)->plx_control_bits &= ~data_bit;
4196 writel(priv(dev)->plx_control_bits, plx_control_addr);
4197 udelay(i2c_high_udelay);
4198 } else { /* set data line low */
4199
4200 priv(dev)->plx_control_bits |= data_bit;
4201 writel(priv(dev)->plx_control_bits, plx_control_addr);
4202 udelay(i2c_low_udelay);
4203 }
4204 }
4205
4206 /* set i2c clock line high or low */
4207 static void i2c_set_scl(struct comedi_device *dev, int state)
4208 {
4209 static const int clock_bit = CTL_USERO;
4210 void __iomem *plx_control_addr = priv(dev)->plx9080_iobase +
4211 PLX_CONTROL_REG;
4212
4213 if (state) {
4214 /* set clock line high */
4215 priv(dev)->plx_control_bits &= ~clock_bit;
4216 writel(priv(dev)->plx_control_bits, plx_control_addr);
4217 udelay(i2c_high_udelay);
4218 } else { /* set clock line low */
4219
4220 priv(dev)->plx_control_bits |= clock_bit;
4221 writel(priv(dev)->plx_control_bits, plx_control_addr);
4222 udelay(i2c_low_udelay);
4223 }
4224 }
4225
4226 static void i2c_write_byte(struct comedi_device *dev, uint8_t byte)
4227 {
4228 uint8_t bit;
4229 unsigned int num_bits = 8;
4230
4231 DEBUG_PRINT("writing to i2c byte 0x%x\n", byte);
4232
4233 for (bit = 1 << (num_bits - 1); bit; bit >>= 1) {
4234 i2c_set_scl(dev, 0);
4235 if ((byte & bit))
4236 i2c_set_sda(dev, 1);
4237 else
4238 i2c_set_sda(dev, 0);
4239 i2c_set_scl(dev, 1);
4240 }
4241 }
4242
4243 /* we can't really read the lines, so fake it */
4244 static int i2c_read_ack(struct comedi_device *dev)
4245 {
4246 i2c_set_scl(dev, 0);
4247 i2c_set_sda(dev, 1);
4248 i2c_set_scl(dev, 1);
4249
4250 return 0; /* return fake acknowledge bit */
4251 }
4252
4253 /* send start bit */
4254 static void i2c_start(struct comedi_device *dev)
4255 {
4256 i2c_set_scl(dev, 1);
4257 i2c_set_sda(dev, 1);
4258 i2c_set_sda(dev, 0);
4259 }
4260
4261 /* send stop bit */
4262 static void i2c_stop(struct comedi_device *dev)
4263 {
4264 i2c_set_scl(dev, 0);
4265 i2c_set_sda(dev, 0);
4266 i2c_set_scl(dev, 1);
4267 i2c_set_sda(dev, 1);
4268 }
4269
4270 static void i2c_write(struct comedi_device *dev, unsigned int address,
4271 const uint8_t * data, unsigned int length)
4272 {
4273 unsigned int i;
4274 uint8_t bitstream;
4275 static const int read_bit = 0x1;
4276
4277 /* XXX need mutex to prevent simultaneous attempts to access eeprom and i2c bus */
4278
4279 /* make sure we dont send anything to eeprom */
4280 priv(dev)->plx_control_bits &= ~CTL_EE_CS;
4281
4282 i2c_stop(dev);
4283 i2c_start(dev);
4284
4285 /* send address and write bit */
4286 bitstream = (address << 1) & ~read_bit;
4287 i2c_write_byte(dev, bitstream);
4288
4289 /* get acknowledge */
4290 if (i2c_read_ack(dev) != 0) {
4291 comedi_error(dev, "i2c write failed: no acknowledge");
4292 i2c_stop(dev);
4293 return;
4294 }
4295 /* write data bytes */
4296 for (i = 0; i < length; i++) {
4297 i2c_write_byte(dev, data[i]);
4298 if (i2c_read_ack(dev) != 0) {
4299 comedi_error(dev, "i2c write failed: no acknowledge");
4300 i2c_stop(dev);
4301 return;
4302 }
4303 }
4304 i2c_stop(dev);
4305 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree