2 * comedi/drivers/amplc_pci230.c
3 * Driver for Amplicon PCI230 and PCI260 Multifunction I/O boards.
5 * Copyright (C) 2001 Allan Willcox <allanwillcox@ozemail.com.au>
7 * COMEDI - Linux Control and Measurement Device Interface
8 * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
22 * Driver: amplc_pci230
23 * Description: Amplicon PCI230, PCI260 Multifunction I/O boards
24 * Author: Allan Willcox <allanwillcox@ozemail.com.au>,
25 * Steve D Sharples <steve.sharples@nottingham.ac.uk>,
26 * Ian Abbott <abbotti@mev.co.uk>
27 * Updated: Mon, 01 Sep 2014 10:09:16 +0000
28 * Devices: [Amplicon] PCI230 (amplc_pci230), PCI230+, PCI260, PCI260+
31 * Configuration options:
34 * Manual configuration of PCI cards is not supported; they are configured
37 * The PCI230+ and PCI260+ have the same PCI device IDs as the PCI230 and
38 * PCI260, but can be distinguished by the size of the PCI regions. A
39 * card will be configured as a "+" model if detected as such.
52 * The AI subdevice has 16 single-ended channels or 8 differential
55 * The PCI230 and PCI260 cards have 12-bit resolution. The PCI230+ and
56 * PCI260+ cards have 16-bit resolution.
58 * For differential mode, use inputs 2N and 2N+1 for channel N (e.g. use
59 * inputs 14 and 15 for channel 7). If the card is physically a PCI230
60 * or PCI260 then it actually uses a "pseudo-differential" mode where the
61 * inputs are sampled a few microseconds apart. The PCI230+ and PCI260+
62 * use true differential sampling. Another difference is that if the
63 * card is physically a PCI230 or PCI260, the inverting input is 2N,
64 * whereas for a PCI230+ or PCI260+ the inverting input is 2N+1. So if a
65 * PCI230 is physically replaced by a PCI230+ (or a PCI260 with a
66 * PCI260+) and differential mode is used, the differential inputs need
67 * to be physically swapped on the connector.
69 * The following input ranges are supported:
74 * 3 => [-1.25, +1.25] V
81 * +=========+==============+===========+============+==========+
82 * |start_src|scan_begin_src|convert_src|scan_end_src| stop_src |
83 * +=========+==============+===========+============+==========+
84 * |TRIG_NOW | TRIG_FOLLOW |TRIG_TIMER | TRIG_COUNT |TRIG_NONE |
85 * |TRIG_INT | |TRIG_EXT(3)| |TRIG_COUNT|
87 * | |--------------|-----------| | |
88 * | | TRIG_TIMER(1)|TRIG_TIMER | | |
89 * | | TRIG_EXT(2) | | | |
90 * | | TRIG_INT | | | |
91 * +---------+--------------+-----------+------------+----------+
93 * Note 1: If AI command and AO command are used simultaneously, only
94 * one may have scan_begin_src == TRIG_TIMER.
96 * Note 2: For PCI230 and PCI230+, scan_begin_src == TRIG_EXT uses
97 * DIO channel 16 (pin 49) which will need to be configured as
98 * a digital input. For PCI260+, the EXTTRIG/EXTCONVCLK input
99 * (pin 17) is used instead. For PCI230, scan_begin_src ==
100 * TRIG_EXT is not supported. The trigger is a rising edge
103 * Note 3: For convert_src == TRIG_EXT, the EXTTRIG/EXTCONVCLK input
104 * (pin 25 on PCI230(+), pin 17 on PCI260(+)) is used. The
105 * convert_arg value is interpreted as follows:
107 * convert_arg == (CR_EDGE | 0) => rising edge
108 * convert_arg == (CR_EDGE | CR_INVERT | 0) => falling edge
109 * convert_arg == 0 => falling edge (backwards compatibility)
110 * convert_arg == 1 => rising edge (backwards compatibility)
112 * All entries in the channel list must use the same analogue reference.
113 * If the analogue reference is not AREF_DIFF (not differential) each
114 * pair of channel numbers (0 and 1, 2 and 3, etc.) must use the same
115 * input range. The input ranges used in the sequence must be all
116 * bipolar (ranges 0 to 3) or all unipolar (ranges 4 to 6). The channel
117 * sequence must consist of 1 or more identical subsequences. Within the
118 * subsequence, channels must be in ascending order with no repeated
119 * channels. For example, the following sequences are valid: 0 1 2 3
120 * (single valid subsequence), 0 2 3 5 0 2 3 5 (repeated valid
121 * subsequence), 1 1 1 1 (repeated valid subsequence). The following
122 * sequences are invalid: 0 3 2 1 (invalid subsequence), 0 2 3 5 0 2 3
123 * (incompletely repeated subsequence). Some versions of the PCI230+ and
124 * PCI260+ have a bug that requires a subsequence longer than one entry
125 * long to include channel 0.
129 * The AO subdevice has 2 channels with 12-bit resolution.
130 * The following output ranges are supported:
136 * +=========+==============+===========+============+==========+
137 * |start_src|scan_begin_src|convert_src|scan_end_src| stop_src |
138 * +=========+==============+===========+============+==========+
139 * |TRIG_INT | TRIG_TIMER(1)| TRIG_NOW | TRIG_COUNT |TRIG_NONE |
140 * | | TRIG_EXT(2) | | |TRIG_COUNT|
141 * | | TRIG_INT | | | |
142 * +---------+--------------+-----------+------------+----------+
144 * Note 1: If AI command and AO command are used simultaneously, only
145 * one may have scan_begin_src == TRIG_TIMER.
147 * Note 2: scan_begin_src == TRIG_EXT is only supported if the card is
148 * configured as a PCI230+ and is only supported on later
149 * versions of the card. As a card configured as a PCI230+ is
150 * not guaranteed to support external triggering, please consider
151 * this support to be a bonus. It uses the EXTTRIG/ EXTCONVCLK
152 * input (PCI230+ pin 25). Triggering will be on the rising edge
153 * unless the CR_INVERT flag is set in scan_begin_arg.
155 * The channels in the channel sequence must be in ascending order with
156 * no repeats. All entries in the channel sequence must use the same
161 * The DIO subdevice is a 8255 chip providing 24 DIO channels. The DIO
162 * channels are configurable as inputs or outputs in four groups:
164 * Port A - channels 0 to 7
165 * Port B - channels 8 to 15
166 * Port CL - channels 16 to 19
167 * Port CH - channels 20 to 23
169 * Only mode 0 of the 8255 chip is supported.
171 * Bit 0 of port C (DIO channel 16) is also used as an external scan
172 * trigger input for AI commands on PCI230 and PCI230+, so would need to
173 * be configured as an input to use it for that purpose.
177 * Extra triggered scan functionality, interrupt bug-fix added by Steve
178 * Sharples. Support for PCI230+/260+, more triggered scan functionality,
179 * and workarounds for (or detection of) various hardware problems added
183 #include <linux/module.h>
184 #include <linux/delay.h>
185 #include <linux/interrupt.h>
187 #include "../comedi_pci.h"
189 #include "comedi_8254.h"
193 * PCI230 PCI configuration register information
195 #define PCI_DEVICE_ID_PCI230 0x0000
196 #define PCI_DEVICE_ID_PCI260 0x0006
199 * PCI230 i/o space 1 registers.
201 #define PCI230_PPI_X_BASE 0x00 /* User PPI (82C55) base */
202 #define PCI230_PPI_X_A 0x00 /* User PPI (82C55) port A */
203 #define PCI230_PPI_X_B 0x01 /* User PPI (82C55) port B */
204 #define PCI230_PPI_X_C 0x02 /* User PPI (82C55) port C */
205 #define PCI230_PPI_X_CMD 0x03 /* User PPI (82C55) control word */
206 #define PCI230_Z2_CT_BASE 0x14 /* 82C54 counter/timer base */
207 #define PCI230_ZCLK_SCE 0x1A /* Group Z Clock Configuration */
208 #define PCI230_ZGAT_SCE 0x1D /* Group Z Gate Configuration */
209 #define PCI230_INT_SCE 0x1E /* Interrupt source mask (w) */
210 #define PCI230_INT_STAT 0x1E /* Interrupt status (r) */
213 * PCI230 i/o space 2 registers.
215 #define PCI230_DACCON 0x00 /* DAC control */
216 #define PCI230_DACOUT1 0x02 /* DAC channel 0 (w) */
217 #define PCI230_DACOUT2 0x04 /* DAC channel 1 (w) (not FIFO mode) */
218 #define PCI230_ADCDATA 0x08 /* ADC data (r) */
219 #define PCI230_ADCSWTRIG 0x08 /* ADC software trigger (w) */
220 #define PCI230_ADCCON 0x0A /* ADC control */
221 #define PCI230_ADCEN 0x0C /* ADC channel enable bits */
222 #define PCI230_ADCG 0x0E /* ADC gain control bits */
223 /* PCI230+ i/o space 2 additional registers. */
224 #define PCI230P_ADCTRIG 0x10 /* ADC start acquisition trigger */
225 #define PCI230P_ADCTH 0x12 /* ADC analog trigger threshold */
226 #define PCI230P_ADCFFTH 0x14 /* ADC FIFO interrupt threshold */
227 #define PCI230P_ADCFFLEV 0x16 /* ADC FIFO level (r) */
228 #define PCI230P_ADCPTSC 0x18 /* ADC pre-trigger sample count (r) */
229 #define PCI230P_ADCHYST 0x1A /* ADC analog trigger hysteresys */
230 #define PCI230P_EXTFUNC 0x1C /* Extended functions */
231 #define PCI230P_HWVER 0x1E /* Hardware version (r) */
232 /* PCI230+ hardware version 2 onwards. */
233 #define PCI230P2_DACDATA 0x02 /* DAC data (FIFO mode) (w) */
234 #define PCI230P2_DACSWTRIG 0x02 /* DAC soft trigger (FIFO mode) (r) */
235 #define PCI230P2_DACEN 0x06 /* DAC channel enable (FIFO mode) */
238 * DACCON read-write values.
240 #define PCI230_DAC_OR(x) (((x) & 0x1) << 0)
241 #define PCI230_DAC_OR_UNI PCI230_DAC_OR(0) /* Output unipolar */
242 #define PCI230_DAC_OR_BIP PCI230_DAC_OR(1) /* Output bipolar */
243 #define PCI230_DAC_OR_MASK PCI230_DAC_OR(1)
245 * The following applies only if DAC FIFO support is enabled in the EXTFUNC
246 * register (and only for PCI230+ hardware version 2 onwards).
248 #define PCI230P2_DAC_FIFO_EN BIT(8) /* FIFO enable */
250 * The following apply only if the DAC FIFO is enabled (and only for PCI230+
251 * hardware version 2 onwards).
253 #define PCI230P2_DAC_TRIG(x) (((x) & 0x7) << 2)
254 #define PCI230P2_DAC_TRIG_NONE PCI230P2_DAC_TRIG(0) /* none */
255 #define PCI230P2_DAC_TRIG_SW PCI230P2_DAC_TRIG(1) /* soft trig */
256 #define PCI230P2_DAC_TRIG_EXTP PCI230P2_DAC_TRIG(2) /* ext + edge */
257 #define PCI230P2_DAC_TRIG_EXTN PCI230P2_DAC_TRIG(3) /* ext - edge */
258 #define PCI230P2_DAC_TRIG_Z2CT0 PCI230P2_DAC_TRIG(4) /* Z2 CT0 out */
259 #define PCI230P2_DAC_TRIG_Z2CT1 PCI230P2_DAC_TRIG(5) /* Z2 CT1 out */
260 #define PCI230P2_DAC_TRIG_Z2CT2 PCI230P2_DAC_TRIG(6) /* Z2 CT2 out */
261 #define PCI230P2_DAC_TRIG_MASK PCI230P2_DAC_TRIG(7)
262 #define PCI230P2_DAC_FIFO_WRAP BIT(7) /* FIFO wraparound mode */
263 #define PCI230P2_DAC_INT_FIFO(x) (((x) & 7) << 9)
264 #define PCI230P2_DAC_INT_FIFO_EMPTY PCI230P2_DAC_INT_FIFO(0) /* empty */
265 #define PCI230P2_DAC_INT_FIFO_NEMPTY PCI230P2_DAC_INT_FIFO(1) /* !empty */
266 #define PCI230P2_DAC_INT_FIFO_NHALF PCI230P2_DAC_INT_FIFO(2) /* !half */
267 #define PCI230P2_DAC_INT_FIFO_HALF PCI230P2_DAC_INT_FIFO(3) /* half */
268 #define PCI230P2_DAC_INT_FIFO_NFULL PCI230P2_DAC_INT_FIFO(4) /* !full */
269 #define PCI230P2_DAC_INT_FIFO_FULL PCI230P2_DAC_INT_FIFO(5) /* full */
270 #define PCI230P2_DAC_INT_FIFO_MASK PCI230P2_DAC_INT_FIFO(7)
273 * DACCON read-only values.
275 #define PCI230_DAC_BUSY BIT(1) /* DAC busy. */
277 * The following apply only if the DAC FIFO is enabled (and only for PCI230+
278 * hardware version 2 onwards).
280 #define PCI230P2_DAC_FIFO_UNDERRUN_LATCHED BIT(5) /* Underrun error */
281 #define PCI230P2_DAC_FIFO_EMPTY BIT(13) /* FIFO empty */
282 #define PCI230P2_DAC_FIFO_FULL BIT(14) /* FIFO full */
283 #define PCI230P2_DAC_FIFO_HALF BIT(15) /* FIFO half full */
286 * DACCON write-only, transient values.
289 * The following apply only if the DAC FIFO is enabled (and only for PCI230+
290 * hardware version 2 onwards).
292 #define PCI230P2_DAC_FIFO_UNDERRUN_CLEAR BIT(5) /* Clear underrun */
293 #define PCI230P2_DAC_FIFO_RESET BIT(12) /* FIFO reset */
296 * PCI230+ hardware version 2 DAC FIFO levels.
298 #define PCI230P2_DAC_FIFOLEVEL_HALF 512
299 #define PCI230P2_DAC_FIFOLEVEL_FULL 1024
300 /* Free space in DAC FIFO. */
301 #define PCI230P2_DAC_FIFOROOM_EMPTY PCI230P2_DAC_FIFOLEVEL_FULL
302 #define PCI230P2_DAC_FIFOROOM_ONETOHALF \
303 (PCI230P2_DAC_FIFOLEVEL_FULL - PCI230P2_DAC_FIFOLEVEL_HALF)
304 #define PCI230P2_DAC_FIFOROOM_HALFTOFULL 1
305 #define PCI230P2_DAC_FIFOROOM_FULL 0
308 * ADCCON read/write values.
310 #define PCI230_ADC_TRIG(x) (((x) & 0x7) << 0)
311 #define PCI230_ADC_TRIG_NONE PCI230_ADC_TRIG(0) /* none */
312 #define PCI230_ADC_TRIG_SW PCI230_ADC_TRIG(1) /* soft trig */
313 #define PCI230_ADC_TRIG_EXTP PCI230_ADC_TRIG(2) /* ext + edge */
314 #define PCI230_ADC_TRIG_EXTN PCI230_ADC_TRIG(3) /* ext - edge */
315 #define PCI230_ADC_TRIG_Z2CT0 PCI230_ADC_TRIG(4) /* Z2 CT0 out*/
316 #define PCI230_ADC_TRIG_Z2CT1 PCI230_ADC_TRIG(5) /* Z2 CT1 out */
317 #define PCI230_ADC_TRIG_Z2CT2 PCI230_ADC_TRIG(6) /* Z2 CT2 out */
318 #define PCI230_ADC_TRIG_MASK PCI230_ADC_TRIG(7)
319 #define PCI230_ADC_IR(x) (((x) & 0x1) << 3)
320 #define PCI230_ADC_IR_UNI PCI230_ADC_IR(0) /* Input unipolar */
321 #define PCI230_ADC_IR_BIP PCI230_ADC_IR(1) /* Input bipolar */
322 #define PCI230_ADC_IR_MASK PCI230_ADC_IR(1)
323 #define PCI230_ADC_IM(x) (((x) & 0x1) << 4)
324 #define PCI230_ADC_IM_SE PCI230_ADC_IM(0) /* single ended */
325 #define PCI230_ADC_IM_DIF PCI230_ADC_IM(1) /* differential */
326 #define PCI230_ADC_IM_MASK PCI230_ADC_IM(1)
327 #define PCI230_ADC_FIFO_EN BIT(8) /* FIFO enable */
328 #define PCI230_ADC_INT_FIFO(x) (((x) & 0x7) << 9)
329 #define PCI230_ADC_INT_FIFO_EMPTY PCI230_ADC_INT_FIFO(0) /* empty */
330 #define PCI230_ADC_INT_FIFO_NEMPTY PCI230_ADC_INT_FIFO(1) /* !empty */
331 #define PCI230_ADC_INT_FIFO_NHALF PCI230_ADC_INT_FIFO(2) /* !half */
332 #define PCI230_ADC_INT_FIFO_HALF PCI230_ADC_INT_FIFO(3) /* half */
333 #define PCI230_ADC_INT_FIFO_NFULL PCI230_ADC_INT_FIFO(4) /* !full */
334 #define PCI230_ADC_INT_FIFO_FULL PCI230_ADC_INT_FIFO(5) /* full */
335 #define PCI230P_ADC_INT_FIFO_THRESH PCI230_ADC_INT_FIFO(7) /* threshold */
336 #define PCI230_ADC_INT_FIFO_MASK PCI230_ADC_INT_FIFO(7)
339 * ADCCON write-only, transient values.
341 #define PCI230_ADC_FIFO_RESET BIT(12) /* FIFO reset */
342 #define PCI230_ADC_GLOB_RESET BIT(13) /* Global reset */
345 * ADCCON read-only values.
347 #define PCI230_ADC_BUSY BIT(15) /* ADC busy */
348 #define PCI230_ADC_FIFO_EMPTY BIT(12) /* FIFO empty */
349 #define PCI230_ADC_FIFO_FULL BIT(13) /* FIFO full */
350 #define PCI230_ADC_FIFO_HALF BIT(14) /* FIFO half full */
351 #define PCI230_ADC_FIFO_FULL_LATCHED BIT(5) /* FIFO overrun occurred */
354 * PCI230 ADC FIFO levels.
356 #define PCI230_ADC_FIFOLEVEL_HALFFULL 2049 /* Value for FIFO half full */
357 #define PCI230_ADC_FIFOLEVEL_FULL 4096 /* FIFO size */
360 * PCI230+ EXTFUNC values.
362 /* Route EXTTRIG pin to external gate inputs. */
363 #define PCI230P_EXTFUNC_GAT_EXTTRIG BIT(0)
364 /* PCI230+ hardware version 2 values. */
365 /* Allow DAC FIFO to be enabled. */
366 #define PCI230P2_EXTFUNC_DACFIFO BIT(1)
369 * Counter/timer clock input configuration sources.
371 #define CLK_CLK 0 /* reserved (channel-specific clock) */
372 #define CLK_10MHZ 1 /* internal 10 MHz clock */
373 #define CLK_1MHZ 2 /* internal 1 MHz clock */
374 #define CLK_100KHZ 3 /* internal 100 kHz clock */
375 #define CLK_10KHZ 4 /* internal 10 kHz clock */
376 #define CLK_1KHZ 5 /* internal 1 kHz clock */
377 #define CLK_OUTNM1 6 /* output of channel-1 modulo total */
378 #define CLK_EXT 7 /* external clock */
379 /* Macro to construct clock input configuration register value. */
380 #define CLK_CONFIG(chan, src) ((((chan) & 3) << 3) | ((src) & 7))
383 * Counter/timer gate input configuration sources.
385 #define GAT_VCC 0 /* VCC (i.e. enabled) */
386 #define GAT_GND 1 /* GND (i.e. disabled) */
387 #define GAT_EXT 2 /* external gate input (PPCn on PCI230) */
388 #define GAT_NOUTNM2 3 /* inverted output of channel-2 modulo total */
390 static inline unsigned int pci230_gat_config(unsigned int chan,
393 return ((chan & 3) << 3) | (src & 7);
397 * Summary of CLK_OUTNM1 and GAT_NOUTNM2 connections for PCI230 and PCI260:
399 * Channel's Channel's
400 * clock input gate input
401 * Channel CLK_OUTNM1 GAT_NOUTNM2
402 * ------- ---------- -----------
403 * Z2-CT0 Z2-CT2-OUT /Z2-CT1-OUT
404 * Z2-CT1 Z2-CT0-OUT /Z2-CT2-OUT
405 * Z2-CT2 Z2-CT1-OUT /Z2-CT0-OUT
409 * Interrupt enables/status register values.
411 #define PCI230_INT_DISABLE 0
412 #define PCI230_INT_PPI_C0 BIT(0)
413 #define PCI230_INT_PPI_C3 BIT(1)
414 #define PCI230_INT_ADC BIT(2)
415 #define PCI230_INT_ZCLK_CT1 BIT(5)
416 /* For PCI230+ hardware version 2 when DAC FIFO enabled. */
417 #define PCI230P2_INT_DAC BIT(4)
420 * (Potentially) shared resources and their owners
423 RES_Z2CT0 = BIT(0), /* Z2-CT0 */
424 RES_Z2CT1 = BIT(1), /* Z2-CT1 */
425 RES_Z2CT2 = BIT(2) /* Z2-CT2 */
429 OWNER_AICMD, /* Owned by AI command */
430 OWNER_AOCMD, /* Owned by AO command */
431 NUM_OWNERS /* Number of owners */
438 /* Combine old and new bits. */
439 #define COMBINE(old, new, mask) (((old) & ~(mask)) | ((new) & (mask)))
441 /* Current CPU. XXX should this be hard_smp_processor_id()? */
442 #define THISCPU smp_processor_id()
445 * Board descriptions for the two boards supported.
448 struct pci230_board {
451 unsigned char ai_bits;
452 unsigned char ao_bits;
453 unsigned char min_hwver; /* Minimum hardware version supported. */
457 static const struct pci230_board pci230_boards[] = {
460 .id = PCI_DEVICE_ID_PCI230,
468 .id = PCI_DEVICE_ID_PCI260,
474 .id = PCI_DEVICE_ID_PCI230,
481 .id = PCI_DEVICE_ID_PCI260,
486 struct pci230_private {
487 spinlock_t isr_spinlock; /* Interrupt spin lock */
488 spinlock_t res_spinlock; /* Shared resources spin lock */
489 spinlock_t ai_stop_spinlock; /* Spin lock for stopping AI command */
490 spinlock_t ao_stop_spinlock; /* Spin lock for stopping AO command */
491 unsigned long daqio; /* PCI230's DAQ I/O space */
492 int intr_cpuid; /* ID of CPU running ISR */
493 unsigned short hwver; /* Hardware version (for '+' models) */
494 unsigned short adccon; /* ADCCON register value */
495 unsigned short daccon; /* DACCON register value */
496 unsigned short adcfifothresh; /* ADC FIFO threshold (PCI230+/260+) */
497 unsigned short adcg; /* ADCG register value */
498 unsigned char ier; /* Interrupt enable bits */
499 unsigned char res_owned[NUM_OWNERS]; /* Owned resources */
500 bool intr_running:1; /* Flag set in interrupt routine */
501 bool ai_bipolar:1; /* Flag AI range is bipolar */
502 bool ao_bipolar:1; /* Flag AO range is bipolar */
503 bool ai_cmd_started:1; /* Flag AI command started */
504 bool ao_cmd_started:1; /* Flag AO command started */
507 /* PCI230 clock source periods in ns */
508 static const unsigned int pci230_timebase[8] = {
509 [CLK_10MHZ] = I8254_OSC_BASE_10MHZ,
510 [CLK_1MHZ] = I8254_OSC_BASE_1MHZ,
511 [CLK_100KHZ] = I8254_OSC_BASE_100KHZ,
512 [CLK_10KHZ] = I8254_OSC_BASE_10KHZ,
513 [CLK_1KHZ] = I8254_OSC_BASE_1KHZ,
516 /* PCI230 analogue input range table */
517 static const struct comedi_lrange pci230_ai_range = {
529 /* PCI230 analogue gain bits for each input range. */
530 static const unsigned char pci230_ai_gain[7] = { 0, 1, 2, 3, 1, 2, 3 };
532 /* PCI230 analogue output range table */
533 static const struct comedi_lrange pci230_ao_range = {
540 static unsigned short pci230_ai_read(struct comedi_device *dev)
542 const struct pci230_board *board = dev->board_ptr;
543 struct pci230_private *devpriv = dev->private;
547 data = inw(devpriv->daqio + PCI230_ADCDATA);
549 * PCI230 is 12 bit - stored in upper bits of 16 bit register
550 * (lower four bits reserved for expansion). PCI230+ is 16 bit AI.
552 * If a bipolar range was specified, mangle it
553 * (twos complement->straight binary).
555 if (devpriv->ai_bipolar)
557 data >>= (16 - board->ai_bits);
561 static unsigned short pci230_ao_mangle_datum(struct comedi_device *dev,
562 unsigned short datum)
564 const struct pci230_board *board = dev->board_ptr;
565 struct pci230_private *devpriv = dev->private;
568 * PCI230 is 12 bit - stored in upper bits of 16 bit register (lower
569 * four bits reserved for expansion). PCI230+ is also 12 bit AO.
571 datum <<= (16 - board->ao_bits);
573 * If a bipolar range was specified, mangle it
574 * (straight binary->twos complement).
576 if (devpriv->ao_bipolar)
581 static void pci230_ao_write_nofifo(struct comedi_device *dev,
582 unsigned short datum, unsigned int chan)
584 struct pci230_private *devpriv = dev->private;
586 /* Write mangled datum to appropriate DACOUT register. */
587 outw(pci230_ao_mangle_datum(dev, datum),
588 devpriv->daqio + ((chan == 0) ? PCI230_DACOUT1 : PCI230_DACOUT2));
591 static void pci230_ao_write_fifo(struct comedi_device *dev,
592 unsigned short datum, unsigned int chan)
594 struct pci230_private *devpriv = dev->private;
596 /* Write mangled datum to appropriate DACDATA register. */
597 outw(pci230_ao_mangle_datum(dev, datum),
598 devpriv->daqio + PCI230P2_DACDATA);
601 static bool pci230_claim_shared(struct comedi_device *dev,
602 unsigned char res_mask, unsigned int owner)
604 struct pci230_private *devpriv = dev->private;
606 unsigned long irqflags;
608 spin_lock_irqsave(&devpriv->res_spinlock, irqflags);
609 for (o = 0; o < NUM_OWNERS; o++) {
612 if (devpriv->res_owned[o] & res_mask) {
613 spin_unlock_irqrestore(&devpriv->res_spinlock,
618 devpriv->res_owned[owner] |= res_mask;
619 spin_unlock_irqrestore(&devpriv->res_spinlock, irqflags);
623 static void pci230_release_shared(struct comedi_device *dev,
624 unsigned char res_mask, unsigned int owner)
626 struct pci230_private *devpriv = dev->private;
627 unsigned long irqflags;
629 spin_lock_irqsave(&devpriv->res_spinlock, irqflags);
630 devpriv->res_owned[owner] &= ~res_mask;
631 spin_unlock_irqrestore(&devpriv->res_spinlock, irqflags);
634 static void pci230_release_all_resources(struct comedi_device *dev,
637 pci230_release_shared(dev, (unsigned char)~0, owner);
640 static unsigned int pci230_divide_ns(u64 ns, unsigned int timebase,
647 rem = do_div(div, timebase);
648 switch (flags & CMDF_ROUND_MASK) {
650 case CMDF_ROUND_NEAREST:
651 div += DIV_ROUND_CLOSEST(rem, timebase);
653 case CMDF_ROUND_DOWN:
656 div += DIV_ROUND_UP(rem, timebase);
659 return div > UINT_MAX ? UINT_MAX : (unsigned int)div;
663 * Given desired period in ns, returns the required internal clock source
664 * and gets the initial count.
666 static unsigned int pci230_choose_clk_count(u64 ns, unsigned int *count,
669 unsigned int clk_src, cnt;
671 for (clk_src = CLK_10MHZ;; clk_src++) {
672 cnt = pci230_divide_ns(ns, pci230_timebase[clk_src], flags);
673 if (cnt <= 65536 || clk_src == CLK_1KHZ)
680 static void pci230_ns_to_single_timer(unsigned int *ns, unsigned int flags)
683 unsigned int clk_src;
685 clk_src = pci230_choose_clk_count(*ns, &count, flags);
686 *ns = count * pci230_timebase[clk_src];
689 static void pci230_ct_setup_ns_mode(struct comedi_device *dev, unsigned int ct,
690 unsigned int mode, u64 ns,
693 unsigned int clk_src;
697 comedi_8254_set_mode(dev->pacer, ct, mode);
698 /* Determine clock source and count. */
699 clk_src = pci230_choose_clk_count(ns, &count, flags);
700 /* Program clock source. */
701 outb(CLK_CONFIG(ct, clk_src), dev->iobase + PCI230_ZCLK_SCE);
702 /* Set initial count. */
706 comedi_8254_write(dev->pacer, ct, count);
709 static void pci230_cancel_ct(struct comedi_device *dev, unsigned int ct)
711 /* Counter ct, 8254 mode 1, initial count not written. */
712 comedi_8254_set_mode(dev->pacer, ct, I8254_MODE1);
715 static int pci230_ai_eoc(struct comedi_device *dev,
716 struct comedi_subdevice *s,
717 struct comedi_insn *insn,
718 unsigned long context)
720 struct pci230_private *devpriv = dev->private;
723 status = inw(devpriv->daqio + PCI230_ADCCON);
724 if ((status & PCI230_ADC_FIFO_EMPTY) == 0)
729 static int pci230_ai_insn_read(struct comedi_device *dev,
730 struct comedi_subdevice *s,
731 struct comedi_insn *insn, unsigned int *data)
733 struct pci230_private *devpriv = dev->private;
735 unsigned int chan, range, aref;
736 unsigned int gainshift;
737 unsigned short adccon, adcen;
740 /* Unpack channel and range. */
741 chan = CR_CHAN(insn->chanspec);
742 range = CR_RANGE(insn->chanspec);
743 aref = CR_AREF(insn->chanspec);
744 if (aref == AREF_DIFF) {
746 if (chan >= s->n_chan / 2) {
747 dev_dbg(dev->class_dev,
748 "%s: differential channel number out of range 0 to %u\n",
749 __func__, (s->n_chan / 2) - 1);
755 * Use Z2-CT2 as a conversion trigger instead of the built-in
756 * software trigger, as otherwise triggering of differential channels
757 * doesn't work properly for some versions of PCI230/260. Also set
758 * FIFO mode because the ADC busy bit only works for software triggers.
760 adccon = PCI230_ADC_TRIG_Z2CT2 | PCI230_ADC_FIFO_EN;
761 /* Set Z2-CT2 output low to avoid any false triggers. */
762 comedi_8254_set_mode(dev->pacer, 2, I8254_MODE0);
763 devpriv->ai_bipolar = comedi_range_is_bipolar(s, range);
764 if (aref == AREF_DIFF) {
766 gainshift = chan * 2;
767 if (devpriv->hwver == 0) {
769 * Original PCI230/260 expects both inputs of the
770 * differential channel to be enabled.
772 adcen = 3 << gainshift;
775 * PCI230+/260+ expects only one input of the
776 * differential channel to be enabled.
778 adcen = 1 << gainshift;
780 adccon |= PCI230_ADC_IM_DIF;
784 gainshift = chan & ~1;
785 adccon |= PCI230_ADC_IM_SE;
787 devpriv->adcg = (devpriv->adcg & ~(3 << gainshift)) |
788 (pci230_ai_gain[range] << gainshift);
789 if (devpriv->ai_bipolar)
790 adccon |= PCI230_ADC_IR_BIP;
792 adccon |= PCI230_ADC_IR_UNI;
795 * Enable only this channel in the scan list - otherwise by default
796 * we'll get one sample from each channel.
798 outw(adcen, devpriv->daqio + PCI230_ADCEN);
800 /* Set gain for channel. */
801 outw(devpriv->adcg, devpriv->daqio + PCI230_ADCG);
803 /* Specify uni/bip, se/diff, conversion source, and reset FIFO. */
804 devpriv->adccon = adccon;
805 outw(adccon | PCI230_ADC_FIFO_RESET, devpriv->daqio + PCI230_ADCCON);
807 /* Convert n samples */
808 for (n = 0; n < insn->n; n++) {
810 * Trigger conversion by toggling Z2-CT2 output
811 * (finish with output high).
813 comedi_8254_set_mode(dev->pacer, 2, I8254_MODE0);
814 comedi_8254_set_mode(dev->pacer, 2, I8254_MODE1);
816 /* wait for conversion to end */
817 ret = comedi_timeout(dev, s, insn, pci230_ai_eoc, 0);
822 data[n] = pci230_ai_read(dev);
825 /* return the number of samples read/written */
829 static int pci230_ao_insn_write(struct comedi_device *dev,
830 struct comedi_subdevice *s,
831 struct comedi_insn *insn,
834 struct pci230_private *devpriv = dev->private;
835 unsigned int chan = CR_CHAN(insn->chanspec);
836 unsigned int range = CR_RANGE(insn->chanspec);
837 unsigned int val = s->readback[chan];
841 * Set range - see analogue output range table; 0 => unipolar 10V,
842 * 1 => bipolar +/-10V range scale
844 devpriv->ao_bipolar = comedi_range_is_bipolar(s, range);
845 outw(range, devpriv->daqio + PCI230_DACCON);
847 for (i = 0; i < insn->n; i++) {
849 pci230_ao_write_nofifo(dev, val, chan);
851 s->readback[chan] = val;
856 static int pci230_ao_check_chanlist(struct comedi_device *dev,
857 struct comedi_subdevice *s,
858 struct comedi_cmd *cmd)
860 unsigned int prev_chan = CR_CHAN(cmd->chanlist[0]);
861 unsigned int range0 = CR_RANGE(cmd->chanlist[0]);
864 for (i = 1; i < cmd->chanlist_len; i++) {
865 unsigned int chan = CR_CHAN(cmd->chanlist[i]);
866 unsigned int range = CR_RANGE(cmd->chanlist[i]);
868 if (chan < prev_chan) {
869 dev_dbg(dev->class_dev,
870 "%s: channel numbers must increase\n",
875 if (range != range0) {
876 dev_dbg(dev->class_dev,
877 "%s: channels must have the same range\n",
888 static int pci230_ao_cmdtest(struct comedi_device *dev,
889 struct comedi_subdevice *s, struct comedi_cmd *cmd)
891 const struct pci230_board *board = dev->board_ptr;
892 struct pci230_private *devpriv = dev->private;
896 /* Step 1 : check if triggers are trivially valid */
898 err |= comedi_check_trigger_src(&cmd->start_src, TRIG_INT);
900 tmp = TRIG_TIMER | TRIG_INT;
901 if (board->min_hwver > 0 && devpriv->hwver >= 2) {
903 * For PCI230+ hardware version 2 onwards, allow external
904 * trigger from EXTTRIG/EXTCONVCLK input (PCI230+ pin 25).
906 * FIXME: The permitted scan_begin_src values shouldn't depend
907 * on devpriv->hwver (the detected card's actual hardware
908 * version). They should only depend on board->min_hwver
909 * (the static capabilities of the configured card). To fix
910 * it, a new card model, e.g. "pci230+2" would have to be
911 * defined with min_hwver set to 2. It doesn't seem worth it
912 * for this alone. At the moment, please consider
913 * scan_begin_src==TRIG_EXT support to be a bonus rather than a
918 err |= comedi_check_trigger_src(&cmd->scan_begin_src, tmp);
920 err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_NOW);
921 err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
922 err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
927 /* Step 2a : make sure trigger sources are unique */
929 err |= comedi_check_trigger_is_unique(cmd->scan_begin_src);
930 err |= comedi_check_trigger_is_unique(cmd->stop_src);
932 /* Step 2b : and mutually compatible */
937 /* Step 3: check if arguments are trivially valid */
939 err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
941 #define MAX_SPEED_AO 8000 /* 8000 ns => 125 kHz */
943 * Comedi limit due to unsigned int cmd. Driver limit =
944 * 2^16 (16bit * counter) * 1000000ns (1kHz onboard clock) = 65.536s
946 #define MIN_SPEED_AO 4294967295u /* 4294967295ns = 4.29s */
948 switch (cmd->scan_begin_src) {
950 err |= comedi_check_trigger_arg_min(&cmd->scan_begin_arg,
952 err |= comedi_check_trigger_arg_max(&cmd->scan_begin_arg,
957 * External trigger - for PCI230+ hardware version 2 onwards.
959 /* Trigger number must be 0. */
960 if (cmd->scan_begin_arg & ~CR_FLAGS_MASK) {
961 cmd->scan_begin_arg = COMBINE(cmd->scan_begin_arg, 0,
966 * The only flags allowed are CR_EDGE and CR_INVERT.
967 * The CR_EDGE flag is ignored.
969 if (cmd->scan_begin_arg & CR_FLAGS_MASK &
970 ~(CR_EDGE | CR_INVERT)) {
971 cmd->scan_begin_arg =
972 COMBINE(cmd->scan_begin_arg, 0,
973 CR_FLAGS_MASK & ~(CR_EDGE | CR_INVERT));
978 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
982 err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
985 if (cmd->stop_src == TRIG_COUNT)
986 err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
988 err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
993 /* Step 4: fix up any arguments */
995 if (cmd->scan_begin_src == TRIG_TIMER) {
996 tmp = cmd->scan_begin_arg;
997 pci230_ns_to_single_timer(&cmd->scan_begin_arg, cmd->flags);
998 if (tmp != cmd->scan_begin_arg)
1005 /* Step 5: check channel list if it exists */
1006 if (cmd->chanlist && cmd->chanlist_len > 0)
1007 err |= pci230_ao_check_chanlist(dev, s, cmd);
1015 static void pci230_ao_stop(struct comedi_device *dev,
1016 struct comedi_subdevice *s)
1018 struct pci230_private *devpriv = dev->private;
1019 unsigned long irqflags;
1020 unsigned char intsrc;
1022 struct comedi_cmd *cmd;
1024 spin_lock_irqsave(&devpriv->ao_stop_spinlock, irqflags);
1025 started = devpriv->ao_cmd_started;
1026 devpriv->ao_cmd_started = false;
1027 spin_unlock_irqrestore(&devpriv->ao_stop_spinlock, irqflags);
1030 cmd = &s->async->cmd;
1031 if (cmd->scan_begin_src == TRIG_TIMER) {
1032 /* Stop scan rate generator. */
1033 pci230_cancel_ct(dev, 1);
1035 /* Determine interrupt source. */
1036 if (devpriv->hwver < 2) {
1037 /* Not using DAC FIFO. Using CT1 interrupt. */
1038 intsrc = PCI230_INT_ZCLK_CT1;
1040 /* Using DAC FIFO interrupt. */
1041 intsrc = PCI230P2_INT_DAC;
1044 * Disable interrupt and wait for interrupt routine to finish running
1045 * unless we are called from the interrupt routine.
1047 spin_lock_irqsave(&devpriv->isr_spinlock, irqflags);
1048 devpriv->ier &= ~intsrc;
1049 while (devpriv->intr_running && devpriv->intr_cpuid != THISCPU) {
1050 spin_unlock_irqrestore(&devpriv->isr_spinlock, irqflags);
1051 spin_lock_irqsave(&devpriv->isr_spinlock, irqflags);
1053 outb(devpriv->ier, dev->iobase + PCI230_INT_SCE);
1054 spin_unlock_irqrestore(&devpriv->isr_spinlock, irqflags);
1055 if (devpriv->hwver >= 2) {
1057 * Using DAC FIFO. Reset FIFO, clear underrun error,
1060 devpriv->daccon &= PCI230_DAC_OR_MASK;
1061 outw(devpriv->daccon | PCI230P2_DAC_FIFO_RESET |
1062 PCI230P2_DAC_FIFO_UNDERRUN_CLEAR,
1063 devpriv->daqio + PCI230_DACCON);
1065 /* Release resources. */
1066 pci230_release_all_resources(dev, OWNER_AOCMD);
1069 static void pci230_handle_ao_nofifo(struct comedi_device *dev,
1070 struct comedi_subdevice *s)
1072 struct comedi_async *async = s->async;
1073 struct comedi_cmd *cmd = &async->cmd;
1074 unsigned short data;
1077 if (cmd->stop_src == TRIG_COUNT && async->scans_done >= cmd->stop_arg)
1080 for (i = 0; i < cmd->chanlist_len; i++) {
1081 unsigned int chan = CR_CHAN(cmd->chanlist[i]);
1083 if (!comedi_buf_read_samples(s, &data, 1)) {
1084 async->events |= COMEDI_CB_OVERFLOW;
1087 pci230_ao_write_nofifo(dev, data, chan);
1088 s->readback[chan] = data;
1091 if (cmd->stop_src == TRIG_COUNT && async->scans_done >= cmd->stop_arg)
1092 async->events |= COMEDI_CB_EOA;
1096 * Loads DAC FIFO (if using it) from buffer.
1097 * Returns false if AO finished due to completion or error, true if still going.
1099 static bool pci230_handle_ao_fifo(struct comedi_device *dev,
1100 struct comedi_subdevice *s)
1102 struct pci230_private *devpriv = dev->private;
1103 struct comedi_async *async = s->async;
1104 struct comedi_cmd *cmd = &async->cmd;
1105 unsigned int num_scans = comedi_nscans_left(s, 0);
1107 unsigned short dacstat;
1109 unsigned int events = 0;
1111 /* Get DAC FIFO status. */
1112 dacstat = inw(devpriv->daqio + PCI230_DACCON);
1114 if (cmd->stop_src == TRIG_COUNT && num_scans == 0)
1115 events |= COMEDI_CB_EOA;
1118 /* Check for FIFO underrun. */
1119 if (dacstat & PCI230P2_DAC_FIFO_UNDERRUN_LATCHED) {
1120 dev_err(dev->class_dev, "AO FIFO underrun\n");
1121 events |= COMEDI_CB_OVERFLOW | COMEDI_CB_ERROR;
1124 * Check for buffer underrun if FIFO less than half full
1125 * (otherwise there will be loads of "DAC FIFO not half full"
1128 if (num_scans == 0 &&
1129 (dacstat & PCI230P2_DAC_FIFO_HALF) == 0) {
1130 dev_err(dev->class_dev, "AO buffer underrun\n");
1131 events |= COMEDI_CB_OVERFLOW | COMEDI_CB_ERROR;
1135 /* Determine how much room is in the FIFO (in samples). */
1136 if (dacstat & PCI230P2_DAC_FIFO_FULL)
1137 room = PCI230P2_DAC_FIFOROOM_FULL;
1138 else if (dacstat & PCI230P2_DAC_FIFO_HALF)
1139 room = PCI230P2_DAC_FIFOROOM_HALFTOFULL;
1140 else if (dacstat & PCI230P2_DAC_FIFO_EMPTY)
1141 room = PCI230P2_DAC_FIFOROOM_EMPTY;
1143 room = PCI230P2_DAC_FIFOROOM_ONETOHALF;
1144 /* Convert room to number of scans that can be added. */
1145 room /= cmd->chanlist_len;
1146 /* Determine number of scans to process. */
1147 if (num_scans > room)
1149 /* Process scans. */
1150 for (n = 0; n < num_scans; n++) {
1151 for (i = 0; i < cmd->chanlist_len; i++) {
1152 unsigned int chan = CR_CHAN(cmd->chanlist[i]);
1153 unsigned short datum;
1155 comedi_buf_read_samples(s, &datum, 1);
1156 pci230_ao_write_fifo(dev, datum, chan);
1157 s->readback[chan] = datum;
1161 if (cmd->stop_src == TRIG_COUNT &&
1162 async->scans_done >= cmd->stop_arg) {
1164 * All data for the command has been written
1165 * to FIFO. Set FIFO interrupt trigger level
1168 devpriv->daccon &= ~PCI230P2_DAC_INT_FIFO_MASK;
1169 devpriv->daccon |= PCI230P2_DAC_INT_FIFO_EMPTY;
1170 outw(devpriv->daccon, devpriv->daqio + PCI230_DACCON);
1172 /* Check if FIFO underrun occurred while writing to FIFO. */
1173 dacstat = inw(devpriv->daqio + PCI230_DACCON);
1174 if (dacstat & PCI230P2_DAC_FIFO_UNDERRUN_LATCHED) {
1175 dev_err(dev->class_dev, "AO FIFO underrun\n");
1176 events |= COMEDI_CB_OVERFLOW | COMEDI_CB_ERROR;
1179 async->events |= events;
1180 return !(async->events & COMEDI_CB_CANCEL_MASK);
1183 static int pci230_ao_inttrig_scan_begin(struct comedi_device *dev,
1184 struct comedi_subdevice *s,
1185 unsigned int trig_num)
1187 struct pci230_private *devpriv = dev->private;
1188 unsigned long irqflags;
1193 spin_lock_irqsave(&devpriv->ao_stop_spinlock, irqflags);
1194 if (!devpriv->ao_cmd_started) {
1195 spin_unlock_irqrestore(&devpriv->ao_stop_spinlock, irqflags);
1199 if (devpriv->hwver < 2) {
1200 /* Not using DAC FIFO. */
1201 spin_unlock_irqrestore(&devpriv->ao_stop_spinlock, irqflags);
1202 pci230_handle_ao_nofifo(dev, s);
1203 comedi_handle_events(dev, s);
1205 /* Using DAC FIFO. */
1206 /* Read DACSWTRIG register to trigger conversion. */
1207 inw(devpriv->daqio + PCI230P2_DACSWTRIG);
1208 spin_unlock_irqrestore(&devpriv->ao_stop_spinlock, irqflags);
1210 /* Delay. Should driver be responsible for this? */
1211 /* XXX TODO: See if DAC busy bit can be used. */
1216 static void pci230_ao_start(struct comedi_device *dev,
1217 struct comedi_subdevice *s)
1219 struct pci230_private *devpriv = dev->private;
1220 struct comedi_async *async = s->async;
1221 struct comedi_cmd *cmd = &async->cmd;
1222 unsigned long irqflags;
1224 devpriv->ao_cmd_started = true;
1226 if (devpriv->hwver >= 2) {
1227 /* Using DAC FIFO. */
1228 unsigned short scantrig;
1231 /* Preload FIFO data. */
1232 run = pci230_handle_ao_fifo(dev, s);
1233 comedi_handle_events(dev, s);
1238 /* Set scan trigger source. */
1239 switch (cmd->scan_begin_src) {
1241 scantrig = PCI230P2_DAC_TRIG_Z2CT1;
1244 /* Trigger on EXTTRIG/EXTCONVCLK pin. */
1245 if ((cmd->scan_begin_arg & CR_INVERT) == 0) {
1247 scantrig = PCI230P2_DAC_TRIG_EXTP;
1250 scantrig = PCI230P2_DAC_TRIG_EXTN;
1254 scantrig = PCI230P2_DAC_TRIG_SW;
1257 /* Shouldn't get here. */
1258 scantrig = PCI230P2_DAC_TRIG_NONE;
1262 (devpriv->daccon & ~PCI230P2_DAC_TRIG_MASK) | scantrig;
1263 outw(devpriv->daccon, devpriv->daqio + PCI230_DACCON);
1265 switch (cmd->scan_begin_src) {
1267 if (devpriv->hwver < 2) {
1268 /* Not using DAC FIFO. */
1269 /* Enable CT1 timer interrupt. */
1270 spin_lock_irqsave(&devpriv->isr_spinlock, irqflags);
1271 devpriv->ier |= PCI230_INT_ZCLK_CT1;
1272 outb(devpriv->ier, dev->iobase + PCI230_INT_SCE);
1273 spin_unlock_irqrestore(&devpriv->isr_spinlock,
1276 /* Set CT1 gate high to start counting. */
1277 outb(pci230_gat_config(1, GAT_VCC),
1278 dev->iobase + PCI230_ZGAT_SCE);
1281 async->inttrig = pci230_ao_inttrig_scan_begin;
1284 if (devpriv->hwver >= 2) {
1285 /* Using DAC FIFO. Enable DAC FIFO interrupt. */
1286 spin_lock_irqsave(&devpriv->isr_spinlock, irqflags);
1287 devpriv->ier |= PCI230P2_INT_DAC;
1288 outb(devpriv->ier, dev->iobase + PCI230_INT_SCE);
1289 spin_unlock_irqrestore(&devpriv->isr_spinlock, irqflags);
1293 static int pci230_ao_inttrig_start(struct comedi_device *dev,
1294 struct comedi_subdevice *s,
1295 unsigned int trig_num)
1297 struct comedi_cmd *cmd = &s->async->cmd;
1299 if (trig_num != cmd->start_src)
1302 s->async->inttrig = NULL;
1303 pci230_ao_start(dev, s);
1308 static int pci230_ao_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
1310 struct pci230_private *devpriv = dev->private;
1311 unsigned short daccon;
1314 /* Get the command. */
1315 struct comedi_cmd *cmd = &s->async->cmd;
1317 if (cmd->scan_begin_src == TRIG_TIMER) {
1319 if (!pci230_claim_shared(dev, RES_Z2CT1, OWNER_AOCMD))
1324 * Set range - see analogue output range table; 0 => unipolar 10V,
1325 * 1 => bipolar +/-10V range scale
1327 range = CR_RANGE(cmd->chanlist[0]);
1328 devpriv->ao_bipolar = comedi_range_is_bipolar(s, range);
1329 daccon = devpriv->ao_bipolar ? PCI230_DAC_OR_BIP : PCI230_DAC_OR_UNI;
1330 /* Use DAC FIFO for hardware version 2 onwards. */
1331 if (devpriv->hwver >= 2) {
1332 unsigned short dacen;
1336 for (i = 0; i < cmd->chanlist_len; i++)
1337 dacen |= 1 << CR_CHAN(cmd->chanlist[i]);
1339 /* Set channel scan list. */
1340 outw(dacen, devpriv->daqio + PCI230P2_DACEN);
1343 * Set DAC scan source to 'none'.
1344 * Set DAC FIFO interrupt trigger level to 'not half full'.
1345 * Reset DAC FIFO and clear underrun.
1347 * N.B. DAC FIFO interrupts are currently disabled.
1349 daccon |= PCI230P2_DAC_FIFO_EN | PCI230P2_DAC_FIFO_RESET |
1350 PCI230P2_DAC_FIFO_UNDERRUN_CLEAR |
1351 PCI230P2_DAC_TRIG_NONE | PCI230P2_DAC_INT_FIFO_NHALF;
1355 outw(daccon, devpriv->daqio + PCI230_DACCON);
1356 /* Preserve most of DACCON apart from write-only, transient bits. */
1357 devpriv->daccon = daccon & ~(PCI230P2_DAC_FIFO_RESET |
1358 PCI230P2_DAC_FIFO_UNDERRUN_CLEAR);
1360 if (cmd->scan_begin_src == TRIG_TIMER) {
1362 * Set the counter timer 1 to the specified scan frequency.
1363 * cmd->scan_begin_arg is sampling period in ns.
1364 * Gate it off for now.
1366 outb(pci230_gat_config(1, GAT_GND),
1367 dev->iobase + PCI230_ZGAT_SCE);
1368 pci230_ct_setup_ns_mode(dev, 1, I8254_MODE3,
1369 cmd->scan_begin_arg,
1373 /* N.B. cmd->start_src == TRIG_INT */
1374 s->async->inttrig = pci230_ao_inttrig_start;
1379 static int pci230_ao_cancel(struct comedi_device *dev,
1380 struct comedi_subdevice *s)
1382 pci230_ao_stop(dev, s);
1386 static int pci230_ai_check_scan_period(struct comedi_cmd *cmd)
1388 unsigned int min_scan_period, chanlist_len;
1391 chanlist_len = cmd->chanlist_len;
1392 if (cmd->chanlist_len == 0)
1395 min_scan_period = chanlist_len * cmd->convert_arg;
1396 if (min_scan_period < chanlist_len ||
1397 min_scan_period < cmd->convert_arg) {
1398 /* Arithmetic overflow. */
1399 min_scan_period = UINT_MAX;
1402 if (cmd->scan_begin_arg < min_scan_period) {
1403 cmd->scan_begin_arg = min_scan_period;
1410 static int pci230_ai_check_chanlist(struct comedi_device *dev,
1411 struct comedi_subdevice *s,
1412 struct comedi_cmd *cmd)
1414 struct pci230_private *devpriv = dev->private;
1415 unsigned int max_diff_chan = (s->n_chan / 2) - 1;
1416 unsigned int prev_chan = 0;
1417 unsigned int prev_range = 0;
1418 unsigned int prev_aref = 0;
1419 bool prev_bipolar = false;
1420 unsigned int subseq_len = 0;
1423 for (i = 0; i < cmd->chanlist_len; i++) {
1424 unsigned int chanspec = cmd->chanlist[i];
1425 unsigned int chan = CR_CHAN(chanspec);
1426 unsigned int range = CR_RANGE(chanspec);
1427 unsigned int aref = CR_AREF(chanspec);
1428 bool bipolar = comedi_range_is_bipolar(s, range);
1430 if (aref == AREF_DIFF && chan >= max_diff_chan) {
1431 dev_dbg(dev->class_dev,
1432 "%s: differential channel number out of range 0 to %u\n",
1433 __func__, max_diff_chan);
1439 * Channel numbers must strictly increase or
1440 * subsequence must repeat exactly.
1442 if (chan <= prev_chan && subseq_len == 0)
1445 if (subseq_len > 0 &&
1446 cmd->chanlist[i % subseq_len] != chanspec) {
1447 dev_dbg(dev->class_dev,
1448 "%s: channel numbers must increase or sequence must repeat exactly\n",
1453 if (aref != prev_aref) {
1454 dev_dbg(dev->class_dev,
1455 "%s: channel sequence analogue references must be all the same (single-ended or differential)\n",
1460 if (bipolar != prev_bipolar) {
1461 dev_dbg(dev->class_dev,
1462 "%s: channel sequence ranges must be all bipolar or all unipolar\n",
1467 if (aref != AREF_DIFF && range != prev_range &&
1468 ((chan ^ prev_chan) & ~1) == 0) {
1469 dev_dbg(dev->class_dev,
1470 "%s: single-ended channel pairs must have the same range\n",
1478 prev_bipolar = bipolar;
1481 if (subseq_len == 0)
1482 subseq_len = cmd->chanlist_len;
1484 if (cmd->chanlist_len % subseq_len) {
1485 dev_dbg(dev->class_dev,
1486 "%s: sequence must repeat exactly\n", __func__);
1491 * Buggy PCI230+ or PCI260+ requires channel 0 to be (first) in the
1492 * sequence if the sequence contains more than one channel. Hardware
1493 * versions 1 and 2 have the bug. There is no hardware version 3.
1495 * Actually, there are two firmwares that report themselves as
1496 * hardware version 1 (the boards have different ADC chips with
1497 * slightly different timing requirements, which was supposed to
1498 * be invisible to software). The first one doesn't seem to have
1499 * the bug, but the second one does, and we can't tell them apart!
1501 if (devpriv->hwver > 0 && devpriv->hwver < 4) {
1502 if (subseq_len > 1 && CR_CHAN(cmd->chanlist[0])) {
1503 dev_info(dev->class_dev,
1504 "amplc_pci230: ai_cmdtest: Buggy PCI230+/260+ h/w version %u requires first channel of multi-channel sequence to be 0 (corrected in h/w version 4)\n",
1513 static int pci230_ai_cmdtest(struct comedi_device *dev,
1514 struct comedi_subdevice *s, struct comedi_cmd *cmd)
1516 const struct pci230_board *board = dev->board_ptr;
1517 struct pci230_private *devpriv = dev->private;
1521 /* Step 1 : check if triggers are trivially valid */
1523 err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_INT);
1525 tmp = TRIG_FOLLOW | TRIG_TIMER | TRIG_INT;
1526 if (board->have_dio || board->min_hwver > 0) {
1528 * Unfortunately, we cannot trigger a scan off an external
1529 * source on the PCI260 board, since it uses the PPIC0 (DIO)
1530 * input, which isn't present on the PCI260. For PCI260+
1531 * we can use the EXTTRIG/EXTCONVCLK input on pin 17 instead.
1535 err |= comedi_check_trigger_src(&cmd->scan_begin_src, tmp);
1536 err |= comedi_check_trigger_src(&cmd->convert_src,
1537 TRIG_TIMER | TRIG_INT | TRIG_EXT);
1538 err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
1539 err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
1544 /* Step 2a : make sure trigger sources are unique */
1546 err |= comedi_check_trigger_is_unique(cmd->start_src);
1547 err |= comedi_check_trigger_is_unique(cmd->scan_begin_src);
1548 err |= comedi_check_trigger_is_unique(cmd->convert_src);
1549 err |= comedi_check_trigger_is_unique(cmd->stop_src);
1551 /* Step 2b : and mutually compatible */
1554 * If scan_begin_src is not TRIG_FOLLOW, then a monostable will be
1555 * set up to generate a fixed number of timed conversion pulses.
1557 if (cmd->scan_begin_src != TRIG_FOLLOW &&
1558 cmd->convert_src != TRIG_TIMER)
1564 /* Step 3: check if arguments are trivially valid */
1566 err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
1568 #define MAX_SPEED_AI_SE 3200 /* PCI230 SE: 3200 ns => 312.5 kHz */
1569 #define MAX_SPEED_AI_DIFF 8000 /* PCI230 DIFF: 8000 ns => 125 kHz */
1570 #define MAX_SPEED_AI_PLUS 4000 /* PCI230+: 4000 ns => 250 kHz */
1572 * Comedi limit due to unsigned int cmd. Driver limit =
1573 * 2^16 (16bit * counter) * 1000000ns (1kHz onboard clock) = 65.536s
1575 #define MIN_SPEED_AI 4294967295u /* 4294967295ns = 4.29s */
1577 if (cmd->convert_src == TRIG_TIMER) {
1578 unsigned int max_speed_ai;
1580 if (devpriv->hwver == 0) {
1582 * PCI230 or PCI260. Max speed depends whether
1583 * single-ended or pseudo-differential.
1585 if (cmd->chanlist && cmd->chanlist_len > 0) {
1586 /* Peek analogue reference of first channel. */
1587 if (CR_AREF(cmd->chanlist[0]) == AREF_DIFF)
1588 max_speed_ai = MAX_SPEED_AI_DIFF;
1590 max_speed_ai = MAX_SPEED_AI_SE;
1593 /* No channel list. Assume single-ended. */
1594 max_speed_ai = MAX_SPEED_AI_SE;
1597 /* PCI230+ or PCI260+. */
1598 max_speed_ai = MAX_SPEED_AI_PLUS;
1601 err |= comedi_check_trigger_arg_min(&cmd->convert_arg,
1603 err |= comedi_check_trigger_arg_max(&cmd->convert_arg,
1605 } else if (cmd->convert_src == TRIG_EXT) {
1609 * convert_arg == (CR_EDGE | 0)
1610 * => trigger on +ve edge.
1611 * convert_arg == (CR_EDGE | CR_INVERT | 0)
1612 * => trigger on -ve edge.
1614 if (cmd->convert_arg & CR_FLAGS_MASK) {
1615 /* Trigger number must be 0. */
1616 if (cmd->convert_arg & ~CR_FLAGS_MASK) {
1617 cmd->convert_arg = COMBINE(cmd->convert_arg, 0,
1622 * The only flags allowed are CR_INVERT and CR_EDGE.
1623 * CR_EDGE is required.
1625 if ((cmd->convert_arg & CR_FLAGS_MASK & ~CR_INVERT) !=
1627 /* Set CR_EDGE, preserve CR_INVERT. */
1629 COMBINE(cmd->start_arg, CR_EDGE | 0,
1630 CR_FLAGS_MASK & ~CR_INVERT);
1635 * Backwards compatibility with previous versions:
1636 * convert_arg == 0 => trigger on -ve edge.
1637 * convert_arg == 1 => trigger on +ve edge.
1639 err |= comedi_check_trigger_arg_max(&cmd->convert_arg,
1643 err |= comedi_check_trigger_arg_is(&cmd->convert_arg, 0);
1646 err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
1649 if (cmd->stop_src == TRIG_COUNT)
1650 err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
1651 else /* TRIG_NONE */
1652 err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
1654 if (cmd->scan_begin_src == TRIG_EXT) {
1656 * external "trigger" to begin each scan:
1657 * scan_begin_arg==0 => use PPC0 input -> gate of CT0 -> gate
1658 * of CT2 (sample convert trigger is CT2)
1660 if (cmd->scan_begin_arg & ~CR_FLAGS_MASK) {
1661 cmd->scan_begin_arg = COMBINE(cmd->scan_begin_arg, 0,
1665 /* The only flag allowed is CR_EDGE, which is ignored. */
1666 if (cmd->scan_begin_arg & CR_FLAGS_MASK & ~CR_EDGE) {
1667 cmd->scan_begin_arg = COMBINE(cmd->scan_begin_arg, 0,
1668 CR_FLAGS_MASK & ~CR_EDGE);
1671 } else if (cmd->scan_begin_src == TRIG_TIMER) {
1672 /* N.B. cmd->convert_arg is also TRIG_TIMER */
1673 if (!pci230_ai_check_scan_period(cmd))
1677 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
1683 /* Step 4: fix up any arguments */
1685 if (cmd->convert_src == TRIG_TIMER) {
1686 tmp = cmd->convert_arg;
1687 pci230_ns_to_single_timer(&cmd->convert_arg, cmd->flags);
1688 if (tmp != cmd->convert_arg)
1692 if (cmd->scan_begin_src == TRIG_TIMER) {
1693 /* N.B. cmd->convert_arg is also TRIG_TIMER */
1694 tmp = cmd->scan_begin_arg;
1695 pci230_ns_to_single_timer(&cmd->scan_begin_arg, cmd->flags);
1696 if (!pci230_ai_check_scan_period(cmd)) {
1697 /* Was below minimum required. Round up. */
1698 pci230_ns_to_single_timer(&cmd->scan_begin_arg,
1700 pci230_ai_check_scan_period(cmd);
1702 if (tmp != cmd->scan_begin_arg)
1709 /* Step 5: check channel list if it exists */
1710 if (cmd->chanlist && cmd->chanlist_len > 0)
1711 err |= pci230_ai_check_chanlist(dev, s, cmd);
1719 static void pci230_ai_update_fifo_trigger_level(struct comedi_device *dev,
1720 struct comedi_subdevice *s)
1722 struct pci230_private *devpriv = dev->private;
1723 struct comedi_cmd *cmd = &s->async->cmd;
1725 unsigned short triglev;
1726 unsigned short adccon;
1728 if (cmd->flags & CMDF_WAKE_EOS)
1729 wake = cmd->scan_end_arg - s->async->cur_chan;
1731 wake = comedi_nsamples_left(s, PCI230_ADC_FIFOLEVEL_HALFFULL);
1733 if (wake >= PCI230_ADC_FIFOLEVEL_HALFFULL) {
1734 triglev = PCI230_ADC_INT_FIFO_HALF;
1735 } else if (wake > 1 && devpriv->hwver > 0) {
1736 /* PCI230+/260+ programmable FIFO interrupt level. */
1737 if (devpriv->adcfifothresh != wake) {
1738 devpriv->adcfifothresh = wake;
1739 outw(wake, devpriv->daqio + PCI230P_ADCFFTH);
1741 triglev = PCI230P_ADC_INT_FIFO_THRESH;
1743 triglev = PCI230_ADC_INT_FIFO_NEMPTY;
1745 adccon = (devpriv->adccon & ~PCI230_ADC_INT_FIFO_MASK) | triglev;
1746 if (adccon != devpriv->adccon) {
1747 devpriv->adccon = adccon;
1748 outw(adccon, devpriv->daqio + PCI230_ADCCON);
1752 static int pci230_ai_inttrig_convert(struct comedi_device *dev,
1753 struct comedi_subdevice *s,
1754 unsigned int trig_num)
1756 struct pci230_private *devpriv = dev->private;
1757 unsigned long irqflags;
1758 unsigned int delayus;
1763 spin_lock_irqsave(&devpriv->ai_stop_spinlock, irqflags);
1764 if (!devpriv->ai_cmd_started) {
1765 spin_unlock_irqrestore(&devpriv->ai_stop_spinlock, irqflags);
1769 * Trigger conversion by toggling Z2-CT2 output.
1770 * Finish with output high.
1772 comedi_8254_set_mode(dev->pacer, 2, I8254_MODE0);
1773 comedi_8254_set_mode(dev->pacer, 2, I8254_MODE1);
1775 * Delay. Should driver be responsible for this? An
1776 * alternative would be to wait until conversion is complete,
1777 * but we can't tell when it's complete because the ADC busy
1778 * bit has a different meaning when FIFO enabled (and when
1779 * FIFO not enabled, it only works for software triggers).
1781 if ((devpriv->adccon & PCI230_ADC_IM_MASK) == PCI230_ADC_IM_DIF &&
1782 devpriv->hwver == 0) {
1783 /* PCI230/260 in differential mode */
1786 /* single-ended or PCI230+/260+ */
1789 spin_unlock_irqrestore(&devpriv->ai_stop_spinlock, irqflags);
1794 static int pci230_ai_inttrig_scan_begin(struct comedi_device *dev,
1795 struct comedi_subdevice *s,
1796 unsigned int trig_num)
1798 struct pci230_private *devpriv = dev->private;
1799 unsigned long irqflags;
1805 spin_lock_irqsave(&devpriv->ai_stop_spinlock, irqflags);
1806 if (devpriv->ai_cmd_started) {
1807 /* Trigger scan by waggling CT0 gate source. */
1808 zgat = pci230_gat_config(0, GAT_GND);
1809 outb(zgat, dev->iobase + PCI230_ZGAT_SCE);
1810 zgat = pci230_gat_config(0, GAT_VCC);
1811 outb(zgat, dev->iobase + PCI230_ZGAT_SCE);
1813 spin_unlock_irqrestore(&devpriv->ai_stop_spinlock, irqflags);
1818 static void pci230_ai_stop(struct comedi_device *dev,
1819 struct comedi_subdevice *s)
1821 struct pci230_private *devpriv = dev->private;
1822 unsigned long irqflags;
1823 struct comedi_cmd *cmd;
1826 spin_lock_irqsave(&devpriv->ai_stop_spinlock, irqflags);
1827 started = devpriv->ai_cmd_started;
1828 devpriv->ai_cmd_started = false;
1829 spin_unlock_irqrestore(&devpriv->ai_stop_spinlock, irqflags);
1832 cmd = &s->async->cmd;
1833 if (cmd->convert_src == TRIG_TIMER) {
1834 /* Stop conversion rate generator. */
1835 pci230_cancel_ct(dev, 2);
1837 if (cmd->scan_begin_src != TRIG_FOLLOW) {
1838 /* Stop scan period monostable. */
1839 pci230_cancel_ct(dev, 0);
1841 spin_lock_irqsave(&devpriv->isr_spinlock, irqflags);
1843 * Disable ADC interrupt and wait for interrupt routine to finish
1844 * running unless we are called from the interrupt routine.
1846 devpriv->ier &= ~PCI230_INT_ADC;
1847 while (devpriv->intr_running && devpriv->intr_cpuid != THISCPU) {
1848 spin_unlock_irqrestore(&devpriv->isr_spinlock, irqflags);
1849 spin_lock_irqsave(&devpriv->isr_spinlock, irqflags);
1851 outb(devpriv->ier, dev->iobase + PCI230_INT_SCE);
1852 spin_unlock_irqrestore(&devpriv->isr_spinlock, irqflags);
1854 * Reset FIFO, disable FIFO and set start conversion source to none.
1855 * Keep se/diff and bip/uni settings.
1858 (devpriv->adccon & (PCI230_ADC_IR_MASK | PCI230_ADC_IM_MASK)) |
1859 PCI230_ADC_TRIG_NONE;
1860 outw(devpriv->adccon | PCI230_ADC_FIFO_RESET,
1861 devpriv->daqio + PCI230_ADCCON);
1862 /* Release resources. */
1863 pci230_release_all_resources(dev, OWNER_AICMD);
1866 static void pci230_ai_start(struct comedi_device *dev,
1867 struct comedi_subdevice *s)
1869 struct pci230_private *devpriv = dev->private;
1870 unsigned long irqflags;
1871 unsigned short conv;
1872 struct comedi_async *async = s->async;
1873 struct comedi_cmd *cmd = &async->cmd;
1875 devpriv->ai_cmd_started = true;
1877 /* Enable ADC FIFO trigger level interrupt. */
1878 spin_lock_irqsave(&devpriv->isr_spinlock, irqflags);
1879 devpriv->ier |= PCI230_INT_ADC;
1880 outb(devpriv->ier, dev->iobase + PCI230_INT_SCE);
1881 spin_unlock_irqrestore(&devpriv->isr_spinlock, irqflags);
1884 * Update conversion trigger source which is currently set
1885 * to CT2 output, which is currently stuck high.
1887 switch (cmd->convert_src) {
1889 conv = PCI230_ADC_TRIG_NONE;
1892 /* Using CT2 output. */
1893 conv = PCI230_ADC_TRIG_Z2CT2;
1896 if (cmd->convert_arg & CR_EDGE) {
1897 if ((cmd->convert_arg & CR_INVERT) == 0) {
1898 /* Trigger on +ve edge. */
1899 conv = PCI230_ADC_TRIG_EXTP;
1901 /* Trigger on -ve edge. */
1902 conv = PCI230_ADC_TRIG_EXTN;
1905 /* Backwards compatibility. */
1906 if (cmd->convert_arg) {
1907 /* Trigger on +ve edge. */
1908 conv = PCI230_ADC_TRIG_EXTP;
1910 /* Trigger on -ve edge. */
1911 conv = PCI230_ADC_TRIG_EXTN;
1917 * Use CT2 output for software trigger due to problems
1918 * in differential mode on PCI230/260.
1920 conv = PCI230_ADC_TRIG_Z2CT2;
1923 devpriv->adccon = (devpriv->adccon & ~PCI230_ADC_TRIG_MASK) | conv;
1924 outw(devpriv->adccon, devpriv->daqio + PCI230_ADCCON);
1925 if (cmd->convert_src == TRIG_INT)
1926 async->inttrig = pci230_ai_inttrig_convert;
1929 * Update FIFO interrupt trigger level, which is currently
1932 pci230_ai_update_fifo_trigger_level(dev, s);
1933 if (cmd->convert_src == TRIG_TIMER) {
1934 /* Update timer gates. */
1937 if (cmd->scan_begin_src != TRIG_FOLLOW) {
1939 * Conversion timer CT2 needs to be gated by
1940 * inverted output of monostable CT2.
1942 zgat = pci230_gat_config(2, GAT_NOUTNM2);
1945 * Conversion timer CT2 needs to be gated on
1948 zgat = pci230_gat_config(2, GAT_VCC);
1950 outb(zgat, dev->iobase + PCI230_ZGAT_SCE);
1951 if (cmd->scan_begin_src != TRIG_FOLLOW) {
1952 /* Set monostable CT0 trigger source. */
1953 switch (cmd->scan_begin_src) {
1955 zgat = pci230_gat_config(0, GAT_VCC);
1959 * For CT0 on PCI230, the external trigger
1960 * (gate) signal comes from PPC0, which is
1961 * channel 16 of the DIO subdevice. The
1962 * application needs to configure this as an
1963 * input in order to use it as an external scan
1966 zgat = pci230_gat_config(0, GAT_EXT);
1970 * Monostable CT0 triggered by rising edge on
1971 * inverted output of CT1 (falling edge on CT1).
1973 zgat = pci230_gat_config(0, GAT_NOUTNM2);
1977 * Monostable CT0 is triggered by inttrig
1978 * function waggling the CT0 gate source.
1980 zgat = pci230_gat_config(0, GAT_VCC);
1983 outb(zgat, dev->iobase + PCI230_ZGAT_SCE);
1984 switch (cmd->scan_begin_src) {
1987 * Scan period timer CT1 needs to be
1988 * gated on to start counting.
1990 zgat = pci230_gat_config(1, GAT_VCC);
1991 outb(zgat, dev->iobase + PCI230_ZGAT_SCE);
1994 async->inttrig = pci230_ai_inttrig_scan_begin;
1998 } else if (cmd->convert_src != TRIG_INT) {
1999 /* No longer need Z2-CT2. */
2000 pci230_release_shared(dev, RES_Z2CT2, OWNER_AICMD);
2004 static int pci230_ai_inttrig_start(struct comedi_device *dev,
2005 struct comedi_subdevice *s,
2006 unsigned int trig_num)
2008 struct comedi_cmd *cmd = &s->async->cmd;
2010 if (trig_num != cmd->start_arg)
2013 s->async->inttrig = NULL;
2014 pci230_ai_start(dev, s);
2019 static void pci230_handle_ai(struct comedi_device *dev,
2020 struct comedi_subdevice *s)
2022 struct pci230_private *devpriv = dev->private;
2023 struct comedi_async *async = s->async;
2024 struct comedi_cmd *cmd = &async->cmd;
2025 unsigned int status_fifo;
2027 unsigned int nsamples;
2028 unsigned int fifoamount;
2031 /* Determine number of samples to read. */
2032 nsamples = comedi_nsamples_left(s, PCI230_ADC_FIFOLEVEL_HALFFULL);
2037 for (i = 0; i < nsamples; i++) {
2038 if (fifoamount == 0) {
2039 /* Read FIFO state. */
2040 status_fifo = inw(devpriv->daqio + PCI230_ADCCON);
2041 if (status_fifo & PCI230_ADC_FIFO_FULL_LATCHED) {
2043 * Report error otherwise FIFO overruns will go
2044 * unnoticed by the caller.
2046 dev_err(dev->class_dev, "AI FIFO overrun\n");
2047 async->events |= COMEDI_CB_ERROR;
2049 } else if (status_fifo & PCI230_ADC_FIFO_EMPTY) {
2052 } else if (status_fifo & PCI230_ADC_FIFO_HALF) {
2053 /* FIFO half full. */
2054 fifoamount = PCI230_ADC_FIFOLEVEL_HALFFULL;
2055 } else if (devpriv->hwver > 0) {
2056 /* Read PCI230+/260+ ADC FIFO level. */
2057 fifoamount = inw(devpriv->daqio +
2059 if (fifoamount == 0)
2060 break; /* Shouldn't happen. */
2062 /* FIFO not empty. */
2067 val = pci230_ai_read(dev);
2068 if (!comedi_buf_write_samples(s, &val, 1))
2073 if (cmd->stop_src == TRIG_COUNT &&
2074 async->scans_done >= cmd->stop_arg) {
2075 async->events |= COMEDI_CB_EOA;
2080 /* update FIFO interrupt trigger level if still running */
2081 if (!(async->events & COMEDI_CB_CANCEL_MASK))
2082 pci230_ai_update_fifo_trigger_level(dev, s);
2085 static int pci230_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
2087 struct pci230_private *devpriv = dev->private;
2088 unsigned int i, chan, range, diff;
2089 unsigned int res_mask;
2090 unsigned short adccon, adcen;
2093 /* Get the command. */
2094 struct comedi_async *async = s->async;
2095 struct comedi_cmd *cmd = &async->cmd;
2098 * Determine which shared resources are needed.
2102 * Need Z2-CT2 to supply a conversion trigger source at a high
2103 * logic level, even if not doing timed conversions.
2105 res_mask |= RES_Z2CT2;
2106 if (cmd->scan_begin_src != TRIG_FOLLOW) {
2107 /* Using Z2-CT0 monostable to gate Z2-CT2 conversion timer */
2108 res_mask |= RES_Z2CT0;
2109 if (cmd->scan_begin_src == TRIG_TIMER) {
2110 /* Using Z2-CT1 for scan frequency */
2111 res_mask |= RES_Z2CT1;
2114 /* Claim resources. */
2115 if (!pci230_claim_shared(dev, res_mask, OWNER_AICMD))
2120 * - Set channel scan list.
2121 * - Set channel gains.
2122 * - Enable and reset FIFO, specify uni/bip, se/diff, and set
2123 * start conversion source to point to something at a high logic
2124 * level (we use the output of counter/timer 2 for this purpose.
2125 * - PAUSE to allow things to settle down.
2126 * - Reset the FIFO again because it needs resetting twice and there
2127 * may have been a false conversion trigger on some versions of
2128 * PCI230/260 due to the start conversion source being set to a
2130 * - Enable ADC FIFO level interrupt.
2131 * - Set actual conversion trigger source and FIFO interrupt trigger
2133 * - If convert_src is TRIG_TIMER, set up the timers.
2136 adccon = PCI230_ADC_FIFO_EN;
2139 if (CR_AREF(cmd->chanlist[0]) == AREF_DIFF) {
2140 /* Differential - all channels must be differential. */
2142 adccon |= PCI230_ADC_IM_DIF;
2144 /* Single ended - all channels must be single-ended. */
2146 adccon |= PCI230_ADC_IM_SE;
2149 range = CR_RANGE(cmd->chanlist[0]);
2150 devpriv->ai_bipolar = comedi_range_is_bipolar(s, range);
2151 if (devpriv->ai_bipolar)
2152 adccon |= PCI230_ADC_IR_BIP;
2154 adccon |= PCI230_ADC_IR_UNI;
2156 for (i = 0; i < cmd->chanlist_len; i++) {
2157 unsigned int gainshift;
2159 chan = CR_CHAN(cmd->chanlist[i]);
2160 range = CR_RANGE(cmd->chanlist[i]);
2162 gainshift = 2 * chan;
2163 if (devpriv->hwver == 0) {
2165 * Original PCI230/260 expects both inputs of
2166 * the differential channel to be enabled.
2168 adcen |= 3 << gainshift;
2171 * PCI230+/260+ expects only one input of the
2172 * differential channel to be enabled.
2174 adcen |= 1 << gainshift;
2177 gainshift = chan & ~1;
2180 devpriv->adcg = (devpriv->adcg & ~(3 << gainshift)) |
2181 (pci230_ai_gain[range] << gainshift);
2184 /* Set channel scan list. */
2185 outw(adcen, devpriv->daqio + PCI230_ADCEN);
2187 /* Set channel gains. */
2188 outw(devpriv->adcg, devpriv->daqio + PCI230_ADCG);
2191 * Set counter/timer 2 output high for use as the initial start
2192 * conversion source.
2194 comedi_8254_set_mode(dev->pacer, 2, I8254_MODE1);
2197 * Temporarily use CT2 output as conversion trigger source and
2198 * temporarily set FIFO interrupt trigger level to 'full'.
2200 adccon |= PCI230_ADC_INT_FIFO_FULL | PCI230_ADC_TRIG_Z2CT2;
2203 * Enable and reset FIFO, specify FIFO trigger level full, specify
2204 * uni/bip, se/diff, and temporarily set the start conversion source
2205 * to CT2 output. Note that CT2 output is currently high, and this
2206 * will produce a false conversion trigger on some versions of the
2207 * PCI230/260, but that will be dealt with later.
2209 devpriv->adccon = adccon;
2210 outw(adccon | PCI230_ADC_FIFO_RESET, devpriv->daqio + PCI230_ADCCON);
2214 * Failure to include this will result in the first few channels'-worth
2215 * of data being corrupt, normally manifesting itself by large negative
2216 * voltages. It seems the board needs time to settle between the first
2217 * FIFO reset (above) and the second FIFO reset (below). Setting the
2218 * channel gains and scan list _before_ the first FIFO reset also
2219 * helps, though only slightly.
2221 usleep_range(25, 100);
2223 /* Reset FIFO again. */
2224 outw(adccon | PCI230_ADC_FIFO_RESET, devpriv->daqio + PCI230_ADCCON);
2226 if (cmd->convert_src == TRIG_TIMER) {
2228 * Set up CT2 as conversion timer, but gate it off for now.
2229 * Note, counter/timer output 2 can be monitored on the
2230 * connector: PCI230 pin 21, PCI260 pin 18.
2232 zgat = pci230_gat_config(2, GAT_GND);
2233 outb(zgat, dev->iobase + PCI230_ZGAT_SCE);
2234 /* Set counter/timer 2 to the specified conversion period. */
2235 pci230_ct_setup_ns_mode(dev, 2, I8254_MODE3, cmd->convert_arg,
2237 if (cmd->scan_begin_src != TRIG_FOLLOW) {
2239 * Set up monostable on CT0 output for scan timing. A
2240 * rising edge on the trigger (gate) input of CT0 will
2241 * trigger the monostable, causing its output to go low
2242 * for the configured period. The period depends on
2243 * the conversion period and the number of conversions
2246 * Set the trigger high before setting up the
2247 * monostable to stop it triggering. The trigger
2248 * source will be changed later.
2250 zgat = pci230_gat_config(0, GAT_VCC);
2251 outb(zgat, dev->iobase + PCI230_ZGAT_SCE);
2252 pci230_ct_setup_ns_mode(dev, 0, I8254_MODE1,
2253 ((u64)cmd->convert_arg *
2256 if (cmd->scan_begin_src == TRIG_TIMER) {
2258 * Monostable on CT0 will be triggered by
2259 * output of CT1 at configured scan frequency.
2261 * Set up CT1 but gate it off for now.
2263 zgat = pci230_gat_config(1, GAT_GND);
2264 outb(zgat, dev->iobase + PCI230_ZGAT_SCE);
2265 pci230_ct_setup_ns_mode(dev, 1, I8254_MODE3,
2266 cmd->scan_begin_arg,
2272 if (cmd->start_src == TRIG_INT)
2273 s->async->inttrig = pci230_ai_inttrig_start;
2275 pci230_ai_start(dev, s);
2280 static int pci230_ai_cancel(struct comedi_device *dev,
2281 struct comedi_subdevice *s)
2283 pci230_ai_stop(dev, s);
2287 /* Interrupt handler */
2288 static irqreturn_t pci230_interrupt(int irq, void *d)
2290 unsigned char status_int, valid_status_int, temp_ier;
2291 struct comedi_device *dev = d;
2292 struct pci230_private *devpriv = dev->private;
2293 struct comedi_subdevice *s_ao = dev->write_subdev;
2294 struct comedi_subdevice *s_ai = dev->read_subdev;
2295 unsigned long irqflags;
2297 /* Read interrupt status/enable register. */
2298 status_int = inb(dev->iobase + PCI230_INT_STAT);
2300 if (status_int == PCI230_INT_DISABLE)
2303 spin_lock_irqsave(&devpriv->isr_spinlock, irqflags);
2304 valid_status_int = devpriv->ier & status_int;
2306 * Disable triggered interrupts.
2307 * (Only those interrupts that need re-enabling, are, later in the
2310 temp_ier = devpriv->ier & ~status_int;
2311 outb(temp_ier, dev->iobase + PCI230_INT_SCE);
2312 devpriv->intr_running = true;
2313 devpriv->intr_cpuid = THISCPU;
2314 spin_unlock_irqrestore(&devpriv->isr_spinlock, irqflags);
2317 * Check the source of interrupt and handle it.
2318 * The PCI230 can cope with concurrent ADC, DAC, PPI C0 and C3
2319 * interrupts. However, at present (Comedi-0.7.60) does not allow
2320 * concurrent execution of commands, instructions or a mixture of the
2324 if (valid_status_int & PCI230_INT_ZCLK_CT1)
2325 pci230_handle_ao_nofifo(dev, s_ao);
2327 if (valid_status_int & PCI230P2_INT_DAC)
2328 pci230_handle_ao_fifo(dev, s_ao);
2330 if (valid_status_int & PCI230_INT_ADC)
2331 pci230_handle_ai(dev, s_ai);
2333 /* Reenable interrupts. */
2334 spin_lock_irqsave(&devpriv->isr_spinlock, irqflags);
2335 if (devpriv->ier != temp_ier)
2336 outb(devpriv->ier, dev->iobase + PCI230_INT_SCE);
2337 devpriv->intr_running = false;
2338 spin_unlock_irqrestore(&devpriv->isr_spinlock, irqflags);
2341 comedi_handle_events(dev, s_ao);
2342 comedi_handle_events(dev, s_ai);
2347 /* Check if PCI device matches a specific board. */
2348 static bool pci230_match_pci_board(const struct pci230_board *board,
2349 struct pci_dev *pci_dev)
2351 /* assume pci_dev->device != PCI_DEVICE_ID_INVALID */
2352 if (board->id != pci_dev->device)
2354 if (board->min_hwver == 0)
2356 /* Looking for a '+' model. First check length of registers. */
2357 if (pci_resource_len(pci_dev, 3) < 32)
2358 return false; /* Not a '+' model. */
2360 * TODO: temporarily enable PCI device and read the hardware version
2361 * register. For now, assume it's okay.
2366 /* Look for board matching PCI device. */
2367 static const struct pci230_board *pci230_find_pci_board(struct pci_dev *pci_dev)
2371 for (i = 0; i < ARRAY_SIZE(pci230_boards); i++)
2372 if (pci230_match_pci_board(&pci230_boards[i], pci_dev))
2373 return &pci230_boards[i];
2377 static int pci230_auto_attach(struct comedi_device *dev,
2378 unsigned long context_unused)
2380 struct pci_dev *pci_dev = comedi_to_pci_dev(dev);
2381 const struct pci230_board *board;
2382 struct pci230_private *devpriv;
2383 struct comedi_subdevice *s;
2386 dev_info(dev->class_dev, "amplc_pci230: attach pci %s\n",
2389 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
2393 spin_lock_init(&devpriv->isr_spinlock);
2394 spin_lock_init(&devpriv->res_spinlock);
2395 spin_lock_init(&devpriv->ai_stop_spinlock);
2396 spin_lock_init(&devpriv->ao_stop_spinlock);
2398 board = pci230_find_pci_board(pci_dev);
2400 dev_err(dev->class_dev,
2401 "amplc_pci230: BUG! cannot determine board type!\n");
2404 dev->board_ptr = board;
2405 dev->board_name = board->name;
2407 rc = comedi_pci_enable(dev);
2412 * Read base addresses of the PCI230's two I/O regions from PCI
2413 * configuration register.
2415 dev->iobase = pci_resource_start(pci_dev, 2);
2416 devpriv->daqio = pci_resource_start(pci_dev, 3);
2417 dev_dbg(dev->class_dev,
2418 "%s I/O region 1 0x%04lx I/O region 2 0x%04lx\n",
2419 dev->board_name, dev->iobase, devpriv->daqio);
2420 /* Read bits of DACCON register - only the output range. */
2421 devpriv->daccon = inw(devpriv->daqio + PCI230_DACCON) &
2424 * Read hardware version register and set extended function register
2427 if (pci_resource_len(pci_dev, 3) >= 32) {
2428 unsigned short extfunc = 0;
2430 devpriv->hwver = inw(devpriv->daqio + PCI230P_HWVER);
2431 if (devpriv->hwver < board->min_hwver) {
2432 dev_err(dev->class_dev,
2433 "%s - bad hardware version - got %u, need %u\n",
2434 dev->board_name, devpriv->hwver,
2438 if (devpriv->hwver > 0) {
2439 if (!board->have_dio) {
2441 * No DIO ports. Route counters' external gates
2442 * to the EXTTRIG signal (PCI260+ pin 17).
2443 * (Otherwise, they would be routed to DIO
2444 * inputs PC0, PC1 and PC2 which don't exist
2447 extfunc |= PCI230P_EXTFUNC_GAT_EXTTRIG;
2449 if (board->ao_bits && devpriv->hwver >= 2) {
2450 /* Enable DAC FIFO functionality. */
2451 extfunc |= PCI230P2_EXTFUNC_DACFIFO;
2454 outw(extfunc, devpriv->daqio + PCI230P_EXTFUNC);
2455 if (extfunc & PCI230P2_EXTFUNC_DACFIFO) {
2457 * Temporarily enable DAC FIFO, reset it and disable
2460 outw(devpriv->daccon | PCI230P2_DAC_FIFO_EN |
2461 PCI230P2_DAC_FIFO_RESET,
2462 devpriv->daqio + PCI230_DACCON);
2463 /* Clear DAC FIFO channel enable register. */
2464 outw(0, devpriv->daqio + PCI230P2_DACEN);
2465 /* Disable DAC FIFO. */
2466 outw(devpriv->daccon, devpriv->daqio + PCI230_DACCON);
2469 /* Disable board's interrupts. */
2470 outb(0, dev->iobase + PCI230_INT_SCE);
2471 /* Set ADC to a reasonable state. */
2473 devpriv->adccon = PCI230_ADC_TRIG_NONE | PCI230_ADC_IM_SE |
2475 outw(1 << 0, devpriv->daqio + PCI230_ADCEN);
2476 outw(devpriv->adcg, devpriv->daqio + PCI230_ADCG);
2477 outw(devpriv->adccon | PCI230_ADC_FIFO_RESET,
2478 devpriv->daqio + PCI230_ADCCON);
2481 rc = request_irq(pci_dev->irq, pci230_interrupt, IRQF_SHARED,
2482 dev->board_name, dev);
2484 dev->irq = pci_dev->irq;
2487 dev->pacer = comedi_8254_init(dev->iobase + PCI230_Z2_CT_BASE,
2492 rc = comedi_alloc_subdevices(dev, 3);
2496 s = &dev->subdevices[0];
2497 /* analog input subdevice */
2498 s->type = COMEDI_SUBD_AI;
2499 s->subdev_flags = SDF_READABLE | SDF_DIFF | SDF_GROUND;
2501 s->maxdata = (1 << board->ai_bits) - 1;
2502 s->range_table = &pci230_ai_range;
2503 s->insn_read = pci230_ai_insn_read;
2504 s->len_chanlist = 256; /* but there are restrictions. */
2506 dev->read_subdev = s;
2507 s->subdev_flags |= SDF_CMD_READ;
2508 s->do_cmd = pci230_ai_cmd;
2509 s->do_cmdtest = pci230_ai_cmdtest;
2510 s->cancel = pci230_ai_cancel;
2513 s = &dev->subdevices[1];
2514 /* analog output subdevice */
2515 if (board->ao_bits) {
2516 s->type = COMEDI_SUBD_AO;
2517 s->subdev_flags = SDF_WRITABLE | SDF_GROUND;
2519 s->maxdata = (1 << board->ao_bits) - 1;
2520 s->range_table = &pci230_ao_range;
2521 s->insn_write = pci230_ao_insn_write;
2522 s->len_chanlist = 2;
2524 dev->write_subdev = s;
2525 s->subdev_flags |= SDF_CMD_WRITE;
2526 s->do_cmd = pci230_ao_cmd;
2527 s->do_cmdtest = pci230_ao_cmdtest;
2528 s->cancel = pci230_ao_cancel;
2531 rc = comedi_alloc_subdev_readback(s);
2535 s->type = COMEDI_SUBD_UNUSED;
2538 s = &dev->subdevices[2];
2539 /* digital i/o subdevice */
2540 if (board->have_dio) {
2541 rc = subdev_8255_init(dev, s, NULL, PCI230_PPI_X_BASE);
2545 s->type = COMEDI_SUBD_UNUSED;
2551 static struct comedi_driver amplc_pci230_driver = {
2552 .driver_name = "amplc_pci230",
2553 .module = THIS_MODULE,
2554 .auto_attach = pci230_auto_attach,
2555 .detach = comedi_pci_detach,
2558 static int amplc_pci230_pci_probe(struct pci_dev *dev,
2559 const struct pci_device_id *id)
2561 return comedi_pci_auto_config(dev, &lc_pci230_driver,
2565 static const struct pci_device_id amplc_pci230_pci_table[] = {
2566 { PCI_DEVICE(PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_PCI230) },
2567 { PCI_DEVICE(PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_PCI260) },
2570 MODULE_DEVICE_TABLE(pci, amplc_pci230_pci_table);
2572 static struct pci_driver amplc_pci230_pci_driver = {
2573 .name = "amplc_pci230",
2574 .id_table = amplc_pci230_pci_table,
2575 .probe = amplc_pci230_pci_probe,
2576 .remove = comedi_pci_auto_unconfig,
2578 module_comedi_pci_driver(amplc_pci230_driver, amplc_pci230_pci_driver);
2580 MODULE_AUTHOR("Comedi http://www.comedi.org");
2581 MODULE_DESCRIPTION("Comedi driver for Amplicon PCI230(+) and PCI260(+)");
2582 MODULE_LICENSE("GPL");