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a69cc3a9 FMH |
1 | /* |
2 | comedi/drivers/das1800.c | |
3 | Driver for Keitley das1700/das1800 series boards | |
4 | Copyright (C) 2000 Frank Mori Hess <fmhess@users.sourceforge.net> | |
5 | ||
6 | COMEDI - Linux Control and Measurement Device Interface | |
7 | Copyright (C) 2000 David A. Schleef <ds@schleef.org> | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | ||
23 | ************************************************************************ | |
24 | */ | |
25 | /* | |
26 | Driver: das1800 | |
27 | Description: Keithley Metrabyte DAS1800 (& compatibles) | |
28 | Author: Frank Mori Hess <fmhess@users.sourceforge.net> | |
29 | Devices: [Keithley Metrabyte] DAS-1701ST (das-1701st), | |
30 | DAS-1701ST-DA (das-1701st-da), DAS-1701/AO (das-1701ao), | |
31 | DAS-1702ST (das-1702st), DAS-1702ST-DA (das-1702st-da), | |
32 | DAS-1702HR (das-1702hr), DAS-1702HR-DA (das-1702hr-da), | |
33 | DAS-1702/AO (das-1702ao), DAS-1801ST (das-1801st), | |
34 | DAS-1801ST-DA (das-1801st-da), DAS-1801HC (das-1801hc), | |
35 | DAS-1801AO (das-1801ao), DAS-1802ST (das-1802st), | |
36 | DAS-1802ST-DA (das-1802st-da), DAS-1802HR (das-1802hr), | |
37 | DAS-1802HR-DA (das-1802hr-da), DAS-1802HC (das-1802hc), | |
38 | DAS-1802AO (das-1802ao) | |
39 | Status: works | |
40 | ||
41 | The waveform analog output on the 'ao' cards is not supported. | |
42 | If you need it, send me (Frank Hess) an email. | |
43 | ||
44 | Configuration options: | |
45 | [0] - I/O port base address | |
46 | [1] - IRQ (optional, required for timed or externally triggered conversions) | |
47 | [2] - DMA0 (optional, requires irq) | |
48 | [3] - DMA1 (optional, requires irq and dma0) | |
49 | */ | |
50 | /* | |
51 | ||
52 | This driver supports the following Keithley boards: | |
53 | ||
54 | das-1701st | |
55 | das-1701st-da | |
56 | das-1701ao | |
57 | das-1702st | |
58 | das-1702st-da | |
59 | das-1702hr | |
60 | das-1702hr-da | |
61 | das-1702ao | |
62 | das-1801st | |
63 | das-1801st-da | |
64 | das-1801hc | |
65 | das-1801ao | |
66 | das-1802st | |
67 | das-1802st-da | |
68 | das-1802hr | |
69 | das-1802hr-da | |
70 | das-1802hc | |
71 | das-1802ao | |
72 | ||
73 | Options: | |
74 | [0] - base io address | |
75 | [1] - irq (optional, required for timed or externally triggered conversions) | |
76 | [2] - dma0 (optional, requires irq) | |
77 | [3] - dma1 (optional, requires irq and dma0) | |
78 | ||
79 | irq can be omitted, although the cmd interface will not work without it. | |
80 | ||
81 | analog input cmd triggers supported: | |
82 | start_src: TRIG_NOW | TRIG_EXT | |
83 | scan_begin_src: TRIG_FOLLOW | TRIG_TIMER | TRIG_EXT | |
84 | scan_end_src: TRIG_COUNT | |
85 | convert_src: TRIG_TIMER | TRIG_EXT (TRIG_EXT requires scan_begin_src == TRIG_FOLLOW) | |
86 | stop_src: TRIG_COUNT | TRIG_EXT | TRIG_NONE | |
87 | ||
88 | scan_begin_src triggers TRIG_TIMER and TRIG_EXT use the card's | |
89 | 'burst mode' which limits the valid conversion time to 64 microseconds | |
90 | (convert_arg <= 64000). This limitation does not apply if scan_begin_src | |
91 | is TRIG_FOLLOW. | |
92 | ||
93 | NOTES: | |
94 | Only the DAS-1801ST has been tested by me. | |
95 | Unipolar and bipolar ranges cannot be mixed in the channel/gain list. | |
96 | ||
97 | TODO: | |
98 | Make it automatically allocate irq and dma channels if they are not specified | |
99 | Add support for analog out on 'ao' cards | |
100 | read insn for analog out | |
101 | */ | |
102 | ||
25436dc9 | 103 | #include <linux/interrupt.h> |
5a0e3ad6 | 104 | #include <linux/slab.h> |
a69cc3a9 FMH |
105 | #include "../comedidev.h" |
106 | ||
107 | #include <linux/ioport.h> | |
108 | #include <asm/dma.h> | |
109 | ||
110 | #include "8253.h" | |
111 | #include "comedi_fc.h" | |
112 | ||
a351ecf3 BP |
113 | /* misc. defines */ |
114 | #define DAS1800_SIZE 16 /* uses 16 io addresses */ | |
115 | #define FIFO_SIZE 1024 /* 1024 sample fifo */ | |
116 | #define TIMER_BASE 200 /* 5 Mhz master clock */ | |
117 | #define UNIPOLAR 0x4 /* bit that determines whether input range is uni/bipolar */ | |
118 | #define DMA_BUF_SIZE 0x1ff00 /* size in bytes of dma buffers */ | |
a69cc3a9 FMH |
119 | |
120 | /* Registers for the das1800 */ | |
121 | #define DAS1800_FIFO 0x0 | |
122 | #define DAS1800_QRAM 0x0 | |
123 | #define DAS1800_DAC 0x0 | |
124 | #define DAS1800_SELECT 0x2 | |
125 | #define ADC 0x0 | |
126 | #define QRAM 0x1 | |
127 | #define DAC(a) (0x2 + a) | |
128 | #define DAS1800_DIGITAL 0x3 | |
129 | #define DAS1800_CONTROL_A 0x4 | |
130 | #define FFEN 0x1 | |
131 | #define CGEN 0x4 | |
132 | #define CGSL 0x8 | |
133 | #define TGEN 0x10 | |
134 | #define TGSL 0x20 | |
135 | #define ATEN 0x80 | |
136 | #define DAS1800_CONTROL_B 0x5 | |
137 | #define DMA_CH5 0x1 | |
138 | #define DMA_CH6 0x2 | |
139 | #define DMA_CH7 0x3 | |
140 | #define DMA_CH5_CH6 0x5 | |
141 | #define DMA_CH6_CH7 0x6 | |
142 | #define DMA_CH7_CH5 0x7 | |
a351ecf3 | 143 | #define DMA_ENABLED 0x3 /* mask used to determine if dma is enabled */ |
a69cc3a9 FMH |
144 | #define DMA_DUAL 0x4 |
145 | #define IRQ3 0x8 | |
146 | #define IRQ5 0x10 | |
147 | #define IRQ7 0x18 | |
148 | #define IRQ10 0x28 | |
149 | #define IRQ11 0x30 | |
150 | #define IRQ15 0x38 | |
151 | #define FIMD 0x40 | |
152 | #define DAS1800_CONTROL_C 0X6 | |
153 | #define IPCLK 0x1 | |
154 | #define XPCLK 0x3 | |
155 | #define BMDE 0x4 | |
156 | #define CMEN 0x8 | |
157 | #define UQEN 0x10 | |
158 | #define SD 0x40 | |
159 | #define UB 0x80 | |
160 | #define DAS1800_STATUS 0x7 | |
a351ecf3 | 161 | /* bits that prevent interrupt status bits (and CVEN) from being cleared on write */ |
a69cc3a9 FMH |
162 | #define CLEAR_INTR_MASK (CVEN_MASK | 0x1f) |
163 | #define INT 0x1 | |
164 | #define DMATC 0x2 | |
165 | #define CT0TC 0x8 | |
166 | #define OVF 0x10 | |
167 | #define FHF 0x20 | |
168 | #define FNE 0x40 | |
a351ecf3 | 169 | #define CVEN_MASK 0x40 /* masks CVEN on write */ |
a69cc3a9 FMH |
170 | #define CVEN 0x80 |
171 | #define DAS1800_BURST_LENGTH 0x8 | |
172 | #define DAS1800_BURST_RATE 0x9 | |
173 | #define DAS1800_QRAM_ADDRESS 0xa | |
174 | #define DAS1800_COUNTER 0xc | |
175 | ||
a351ecf3 | 176 | #define IOBASE2 0x400 /* offset of additional ioports used on 'ao' cards */ |
a69cc3a9 FMH |
177 | |
178 | enum { | |
179 | das1701st, das1701st_da, das1702st, das1702st_da, das1702hr, | |
180 | das1702hr_da, | |
181 | das1701ao, das1702ao, das1801st, das1801st_da, das1802st, das1802st_da, | |
182 | das1802hr, das1802hr_da, das1801hc, das1802hc, das1801ao, das1802ao | |
183 | }; | |
184 | ||
0a85b6f0 MT |
185 | static int das1800_attach(struct comedi_device *dev, |
186 | struct comedi_devconfig *it); | |
814900c9 BP |
187 | static int das1800_detach(struct comedi_device *dev); |
188 | static int das1800_probe(struct comedi_device *dev); | |
0a85b6f0 MT |
189 | static int das1800_cancel(struct comedi_device *dev, |
190 | struct comedi_subdevice *s); | |
70265d24 | 191 | static irqreturn_t das1800_interrupt(int irq, void *d); |
0a85b6f0 MT |
192 | static int das1800_ai_poll(struct comedi_device *dev, |
193 | struct comedi_subdevice *s); | |
814900c9 | 194 | static void das1800_ai_handler(struct comedi_device *dev); |
0a85b6f0 MT |
195 | static void das1800_handle_dma(struct comedi_device *dev, |
196 | struct comedi_subdevice *s, unsigned int status); | |
197 | static void das1800_flush_dma(struct comedi_device *dev, | |
198 | struct comedi_subdevice *s); | |
199 | static void das1800_flush_dma_channel(struct comedi_device *dev, | |
200 | struct comedi_subdevice *s, | |
201 | unsigned int channel, uint16_t * buffer); | |
814900c9 | 202 | static void das1800_handle_fifo_half_full(struct comedi_device *dev, |
0a85b6f0 | 203 | struct comedi_subdevice *s); |
814900c9 | 204 | static void das1800_handle_fifo_not_empty(struct comedi_device *dev, |
0a85b6f0 MT |
205 | struct comedi_subdevice *s); |
206 | static int das1800_ai_do_cmdtest(struct comedi_device *dev, | |
207 | struct comedi_subdevice *s, | |
208 | struct comedi_cmd *cmd); | |
209 | static int das1800_ai_do_cmd(struct comedi_device *dev, | |
210 | struct comedi_subdevice *s); | |
211 | static int das1800_ai_rinsn(struct comedi_device *dev, | |
212 | struct comedi_subdevice *s, | |
213 | struct comedi_insn *insn, unsigned int *data); | |
214 | static int das1800_ao_winsn(struct comedi_device *dev, | |
215 | struct comedi_subdevice *s, | |
216 | struct comedi_insn *insn, unsigned int *data); | |
217 | static int das1800_di_rbits(struct comedi_device *dev, | |
218 | struct comedi_subdevice *s, | |
219 | struct comedi_insn *insn, unsigned int *data); | |
220 | static int das1800_do_wbits(struct comedi_device *dev, | |
221 | struct comedi_subdevice *s, | |
222 | struct comedi_insn *insn, unsigned int *data); | |
814900c9 BP |
223 | |
224 | static int das1800_set_frequency(struct comedi_device *dev); | |
a69cc3a9 | 225 | static unsigned int burst_convert_arg(unsigned int convert_arg, int round_mode); |
814900c9 | 226 | static unsigned int suggest_transfer_size(struct comedi_cmd *cmd); |
a69cc3a9 | 227 | |
a351ecf3 | 228 | /* analog input ranges */ |
9ced1de6 | 229 | static const struct comedi_lrange range_ai_das1801 = { |
a69cc3a9 FMH |
230 | 8, |
231 | { | |
0a85b6f0 MT |
232 | RANGE(-5, 5), |
233 | RANGE(-1, 1), | |
234 | RANGE(-0.1, 0.1), | |
235 | RANGE(-0.02, 0.02), | |
236 | RANGE(0, 5), | |
237 | RANGE(0, 1), | |
238 | RANGE(0, 0.1), | |
239 | RANGE(0, 0.02), | |
240 | } | |
a69cc3a9 FMH |
241 | }; |
242 | ||
9ced1de6 | 243 | static const struct comedi_lrange range_ai_das1802 = { |
a69cc3a9 FMH |
244 | 8, |
245 | { | |
0a85b6f0 MT |
246 | RANGE(-10, 10), |
247 | RANGE(-5, 5), | |
248 | RANGE(-2.5, 2.5), | |
249 | RANGE(-1.25, 1.25), | |
250 | RANGE(0, 10), | |
251 | RANGE(0, 5), | |
252 | RANGE(0, 2.5), | |
253 | RANGE(0, 1.25), | |
254 | } | |
a69cc3a9 FMH |
255 | }; |
256 | ||
ce422cf3 | 257 | struct das1800_board { |
a69cc3a9 FMH |
258 | const char *name; |
259 | int ai_speed; /* max conversion period in nanoseconds */ | |
260 | int resolution; /* bits of ai resolution */ | |
261 | int qram_len; /* length of card's channel / gain queue */ | |
262 | int common; /* supports AREF_COMMON flag */ | |
263 | int do_n_chan; /* number of digital output channels */ | |
264 | int ao_ability; /* 0 == no analog out, 1 == basic analog out, 2 == waveform analog out */ | |
265 | int ao_n_chan; /* number of analog out channels */ | |
9ced1de6 | 266 | const struct comedi_lrange *range_ai; /* available input ranges */ |
ce422cf3 | 267 | }; |
a69cc3a9 FMH |
268 | |
269 | /* Warning: the maximum conversion speeds listed below are | |
270 | * not always achievable depending on board setup (see | |
271 | * user manual.) | |
272 | */ | |
ce422cf3 | 273 | static const struct das1800_board das1800_boards[] = { |
a69cc3a9 | 274 | { |
0a85b6f0 MT |
275 | .name = "das-1701st", |
276 | .ai_speed = 6250, | |
277 | .resolution = 12, | |
278 | .qram_len = 256, | |
279 | .common = 1, | |
280 | .do_n_chan = 4, | |
281 | .ao_ability = 0, | |
282 | .ao_n_chan = 0, | |
283 | .range_ai = &range_ai_das1801, | |
284 | }, | |
a69cc3a9 | 285 | { |
0a85b6f0 MT |
286 | .name = "das-1701st-da", |
287 | .ai_speed = 6250, | |
288 | .resolution = 12, | |
289 | .qram_len = 256, | |
290 | .common = 1, | |
291 | .do_n_chan = 4, | |
292 | .ao_ability = 1, | |
293 | .ao_n_chan = 4, | |
294 | .range_ai = &range_ai_das1801, | |
295 | }, | |
a69cc3a9 | 296 | { |
0a85b6f0 MT |
297 | .name = "das-1702st", |
298 | .ai_speed = 6250, | |
299 | .resolution = 12, | |
300 | .qram_len = 256, | |
301 | .common = 1, | |
302 | .do_n_chan = 4, | |
303 | .ao_ability = 0, | |
304 | .ao_n_chan = 0, | |
305 | .range_ai = &range_ai_das1802, | |
306 | }, | |
a69cc3a9 | 307 | { |
0a85b6f0 MT |
308 | .name = "das-1702st-da", |
309 | .ai_speed = 6250, | |
310 | .resolution = 12, | |
311 | .qram_len = 256, | |
312 | .common = 1, | |
313 | .do_n_chan = 4, | |
314 | .ao_ability = 1, | |
315 | .ao_n_chan = 4, | |
316 | .range_ai = &range_ai_das1802, | |
317 | }, | |
a69cc3a9 | 318 | { |
0a85b6f0 MT |
319 | .name = "das-1702hr", |
320 | .ai_speed = 20000, | |
321 | .resolution = 16, | |
322 | .qram_len = 256, | |
323 | .common = 1, | |
324 | .do_n_chan = 4, | |
325 | .ao_ability = 0, | |
326 | .ao_n_chan = 0, | |
327 | .range_ai = &range_ai_das1802, | |
328 | }, | |
a69cc3a9 | 329 | { |
0a85b6f0 MT |
330 | .name = "das-1702hr-da", |
331 | .ai_speed = 20000, | |
332 | .resolution = 16, | |
333 | .qram_len = 256, | |
334 | .common = 1, | |
335 | .do_n_chan = 4, | |
336 | .ao_ability = 1, | |
337 | .ao_n_chan = 2, | |
338 | .range_ai = &range_ai_das1802, | |
339 | }, | |
a69cc3a9 | 340 | { |
0a85b6f0 MT |
341 | .name = "das-1701ao", |
342 | .ai_speed = 6250, | |
343 | .resolution = 12, | |
344 | .qram_len = 256, | |
345 | .common = 1, | |
346 | .do_n_chan = 4, | |
347 | .ao_ability = 2, | |
348 | .ao_n_chan = 2, | |
349 | .range_ai = &range_ai_das1801, | |
350 | }, | |
a69cc3a9 | 351 | { |
0a85b6f0 MT |
352 | .name = "das-1702ao", |
353 | .ai_speed = 6250, | |
354 | .resolution = 12, | |
355 | .qram_len = 256, | |
356 | .common = 1, | |
357 | .do_n_chan = 4, | |
358 | .ao_ability = 2, | |
359 | .ao_n_chan = 2, | |
360 | .range_ai = &range_ai_das1802, | |
361 | }, | |
a69cc3a9 | 362 | { |
0a85b6f0 MT |
363 | .name = "das-1801st", |
364 | .ai_speed = 3000, | |
365 | .resolution = 12, | |
366 | .qram_len = 256, | |
367 | .common = 1, | |
368 | .do_n_chan = 4, | |
369 | .ao_ability = 0, | |
370 | .ao_n_chan = 0, | |
371 | .range_ai = &range_ai_das1801, | |
372 | }, | |
a69cc3a9 | 373 | { |
0a85b6f0 MT |
374 | .name = "das-1801st-da", |
375 | .ai_speed = 3000, | |
376 | .resolution = 12, | |
377 | .qram_len = 256, | |
378 | .common = 1, | |
379 | .do_n_chan = 4, | |
380 | .ao_ability = 0, | |
381 | .ao_n_chan = 4, | |
382 | .range_ai = &range_ai_das1801, | |
383 | }, | |
a69cc3a9 | 384 | { |
0a85b6f0 MT |
385 | .name = "das-1802st", |
386 | .ai_speed = 3000, | |
387 | .resolution = 12, | |
388 | .qram_len = 256, | |
389 | .common = 1, | |
390 | .do_n_chan = 4, | |
391 | .ao_ability = 0, | |
392 | .ao_n_chan = 0, | |
393 | .range_ai = &range_ai_das1802, | |
394 | }, | |
a69cc3a9 | 395 | { |
0a85b6f0 MT |
396 | .name = "das-1802st-da", |
397 | .ai_speed = 3000, | |
398 | .resolution = 12, | |
399 | .qram_len = 256, | |
400 | .common = 1, | |
401 | .do_n_chan = 4, | |
402 | .ao_ability = 1, | |
403 | .ao_n_chan = 4, | |
404 | .range_ai = &range_ai_das1802, | |
405 | }, | |
a69cc3a9 | 406 | { |
0a85b6f0 MT |
407 | .name = "das-1802hr", |
408 | .ai_speed = 10000, | |
409 | .resolution = 16, | |
410 | .qram_len = 256, | |
411 | .common = 1, | |
412 | .do_n_chan = 4, | |
413 | .ao_ability = 0, | |
414 | .ao_n_chan = 0, | |
415 | .range_ai = &range_ai_das1802, | |
416 | }, | |
a69cc3a9 | 417 | { |
0a85b6f0 MT |
418 | .name = "das-1802hr-da", |
419 | .ai_speed = 10000, | |
420 | .resolution = 16, | |
421 | .qram_len = 256, | |
422 | .common = 1, | |
423 | .do_n_chan = 4, | |
424 | .ao_ability = 1, | |
425 | .ao_n_chan = 2, | |
426 | .range_ai = &range_ai_das1802, | |
427 | }, | |
a69cc3a9 | 428 | { |
0a85b6f0 MT |
429 | .name = "das-1801hc", |
430 | .ai_speed = 3000, | |
431 | .resolution = 12, | |
432 | .qram_len = 64, | |
433 | .common = 0, | |
434 | .do_n_chan = 8, | |
435 | .ao_ability = 1, | |
436 | .ao_n_chan = 2, | |
437 | .range_ai = &range_ai_das1801, | |
438 | }, | |
a69cc3a9 | 439 | { |
0a85b6f0 MT |
440 | .name = "das-1802hc", |
441 | .ai_speed = 3000, | |
442 | .resolution = 12, | |
443 | .qram_len = 64, | |
444 | .common = 0, | |
445 | .do_n_chan = 8, | |
446 | .ao_ability = 1, | |
447 | .ao_n_chan = 2, | |
448 | .range_ai = &range_ai_das1802, | |
449 | }, | |
a69cc3a9 | 450 | { |
0a85b6f0 MT |
451 | .name = "das-1801ao", |
452 | .ai_speed = 3000, | |
453 | .resolution = 12, | |
454 | .qram_len = 256, | |
455 | .common = 1, | |
456 | .do_n_chan = 4, | |
457 | .ao_ability = 2, | |
458 | .ao_n_chan = 2, | |
459 | .range_ai = &range_ai_das1801, | |
460 | }, | |
a69cc3a9 | 461 | { |
0a85b6f0 MT |
462 | .name = "das-1802ao", |
463 | .ai_speed = 3000, | |
464 | .resolution = 12, | |
465 | .qram_len = 256, | |
466 | .common = 1, | |
467 | .do_n_chan = 4, | |
468 | .ao_ability = 2, | |
469 | .ao_n_chan = 2, | |
470 | .range_ai = &range_ai_das1802, | |
471 | }, | |
a69cc3a9 FMH |
472 | }; |
473 | ||
474 | /* | |
475 | * Useful for shorthand access to the particular board structure | |
476 | */ | |
ce422cf3 | 477 | #define thisboard ((const struct das1800_board *)dev->board_ptr) |
a69cc3a9 | 478 | |
0c5a144d | 479 | struct das1800_private { |
a69cc3a9 FMH |
480 | volatile unsigned int count; /* number of data points left to be taken */ |
481 | unsigned int divisor1; /* value to load into board's counter 1 for timed conversions */ | |
482 | unsigned int divisor2; /* value to load into board's counter 2 for timed conversions */ | |
483 | int do_bits; /* digital output bits */ | |
484 | int irq_dma_bits; /* bits for control register b */ | |
485 | /* dma bits for control register b, stored so that dma can be | |
486 | * turned on and off */ | |
487 | int dma_bits; | |
488 | unsigned int dma0; /* dma channels used */ | |
489 | unsigned int dma1; | |
490 | volatile unsigned int dma_current; /* dma channel currently in use */ | |
491 | uint16_t *ai_buf0; /* pointers to dma buffers */ | |
492 | uint16_t *ai_buf1; | |
493 | uint16_t *dma_current_buf; /* pointer to dma buffer currently being used */ | |
494 | unsigned int dma_transfer_size; /* size of transfer currently used, in bytes */ | |
495 | unsigned long iobase2; /* secondary io address used for analog out on 'ao' boards */ | |
496 | short ao_update_bits; /* remembers the last write to the 'update' dac */ | |
0c5a144d | 497 | }; |
a69cc3a9 | 498 | |
0c5a144d | 499 | #define devpriv ((struct das1800_private *)dev->private) |
a69cc3a9 | 500 | |
a351ecf3 | 501 | /* analog out range for boards with basic analog out */ |
9ced1de6 | 502 | static const struct comedi_lrange range_ao_1 = { |
a69cc3a9 FMH |
503 | 1, |
504 | { | |
0a85b6f0 MT |
505 | RANGE(-10, 10), |
506 | } | |
a69cc3a9 FMH |
507 | }; |
508 | ||
a351ecf3 | 509 | /* analog out range for 'ao' boards */ |
a69cc3a9 | 510 | /* |
9ced1de6 | 511 | static const struct comedi_lrange range_ao_2 = { |
a69cc3a9 FMH |
512 | 2, |
513 | { | |
514 | RANGE(-10, 10), | |
515 | RANGE(-5, 5), | |
516 | } | |
517 | }; | |
518 | */ | |
519 | ||
139dfbdf | 520 | static struct comedi_driver driver_das1800 = { |
68c3dbff BP |
521 | .driver_name = "das1800", |
522 | .module = THIS_MODULE, | |
523 | .attach = das1800_attach, | |
524 | .detach = das1800_detach, | |
8629efa4 | 525 | .num_names = ARRAY_SIZE(das1800_boards), |
68c3dbff BP |
526 | .board_name = &das1800_boards[0].name, |
527 | .offset = sizeof(struct das1800_board), | |
a69cc3a9 FMH |
528 | }; |
529 | ||
530 | /* | |
531 | * A convenient macro that defines init_module() and cleanup_module(), | |
532 | * as necessary. | |
533 | */ | |
534 | COMEDI_INITCLEANUP(driver_das1800); | |
535 | ||
da91b269 | 536 | static int das1800_init_dma(struct comedi_device *dev, unsigned int dma0, |
0a85b6f0 | 537 | unsigned int dma1) |
a69cc3a9 FMH |
538 | { |
539 | unsigned long flags; | |
540 | ||
a351ecf3 | 541 | /* need an irq to do dma */ |
a69cc3a9 | 542 | if (dev->irq && dma0) { |
a351ecf3 | 543 | /* encode dma0 and dma1 into 2 digit hexadecimal for switch */ |
a69cc3a9 | 544 | switch ((dma0 & 0x7) | (dma1 << 4)) { |
a351ecf3 | 545 | case 0x5: /* dma0 == 5 */ |
a69cc3a9 FMH |
546 | devpriv->dma_bits |= DMA_CH5; |
547 | break; | |
a351ecf3 | 548 | case 0x6: /* dma0 == 6 */ |
a69cc3a9 FMH |
549 | devpriv->dma_bits |= DMA_CH6; |
550 | break; | |
a351ecf3 | 551 | case 0x7: /* dma0 == 7 */ |
a69cc3a9 FMH |
552 | devpriv->dma_bits |= DMA_CH7; |
553 | break; | |
a351ecf3 | 554 | case 0x65: /* dma0 == 5, dma1 == 6 */ |
a69cc3a9 FMH |
555 | devpriv->dma_bits |= DMA_CH5_CH6; |
556 | break; | |
a351ecf3 | 557 | case 0x76: /* dma0 == 6, dma1 == 7 */ |
a69cc3a9 FMH |
558 | devpriv->dma_bits |= DMA_CH6_CH7; |
559 | break; | |
a351ecf3 | 560 | case 0x57: /* dma0 == 7, dma1 == 5 */ |
a69cc3a9 FMH |
561 | devpriv->dma_bits |= DMA_CH7_CH5; |
562 | break; | |
563 | default: | |
564 | printk(" only supports dma channels 5 through 7\n" | |
0a85b6f0 MT |
565 | " Dual dma only allows the following combinations:\n" |
566 | " dma 5,6 / 6,7 / or 7,5\n"); | |
a69cc3a9 FMH |
567 | return -EINVAL; |
568 | break; | |
569 | } | |
570 | if (request_dma(dma0, driver_das1800.driver_name)) { | |
571 | printk(" failed to allocate dma channel %i\n", dma0); | |
572 | return -EINVAL; | |
573 | } | |
574 | devpriv->dma0 = dma0; | |
575 | devpriv->dma_current = dma0; | |
576 | if (dma1) { | |
577 | if (request_dma(dma1, driver_das1800.driver_name)) { | |
578 | printk(" failed to allocate dma channel %i\n", | |
0a85b6f0 | 579 | dma1); |
a69cc3a9 FMH |
580 | return -EINVAL; |
581 | } | |
582 | devpriv->dma1 = dma1; | |
583 | } | |
584 | devpriv->ai_buf0 = kmalloc(DMA_BUF_SIZE, GFP_KERNEL | GFP_DMA); | |
585 | if (devpriv->ai_buf0 == NULL) | |
586 | return -ENOMEM; | |
587 | devpriv->dma_current_buf = devpriv->ai_buf0; | |
588 | if (dma1) { | |
589 | devpriv->ai_buf1 = | |
0a85b6f0 | 590 | kmalloc(DMA_BUF_SIZE, GFP_KERNEL | GFP_DMA); |
a69cc3a9 FMH |
591 | if (devpriv->ai_buf1 == NULL) |
592 | return -ENOMEM; | |
593 | } | |
594 | flags = claim_dma_lock(); | |
595 | disable_dma(devpriv->dma0); | |
596 | set_dma_mode(devpriv->dma0, DMA_MODE_READ); | |
597 | if (dma1) { | |
598 | disable_dma(devpriv->dma1); | |
599 | set_dma_mode(devpriv->dma1, DMA_MODE_READ); | |
600 | } | |
601 | release_dma_lock(flags); | |
602 | } | |
603 | return 0; | |
604 | } | |
605 | ||
0a85b6f0 MT |
606 | static int das1800_attach(struct comedi_device *dev, |
607 | struct comedi_devconfig *it) | |
a69cc3a9 | 608 | { |
34c43922 | 609 | struct comedi_subdevice *s; |
a69cc3a9 FMH |
610 | unsigned long iobase = it->options[0]; |
611 | unsigned int irq = it->options[1]; | |
612 | unsigned int dma0 = it->options[2]; | |
613 | unsigned int dma1 = it->options[3]; | |
614 | unsigned long iobase2; | |
615 | int board; | |
616 | int retval; | |
617 | ||
618 | /* allocate and initialize dev->private */ | |
0c5a144d | 619 | if (alloc_private(dev, sizeof(struct das1800_private)) < 0) |
a69cc3a9 FMH |
620 | return -ENOMEM; |
621 | ||
622 | printk("comedi%d: %s: io 0x%lx", dev->minor, driver_das1800.driver_name, | |
0a85b6f0 | 623 | iobase); |
a69cc3a9 FMH |
624 | if (irq) { |
625 | printk(", irq %u", irq); | |
626 | if (dma0) { | |
627 | printk(", dma %u", dma0); | |
628 | if (dma1) | |
629 | printk(" and %u", dma1); | |
630 | } | |
631 | } | |
632 | printk("\n"); | |
633 | ||
634 | if (iobase == 0) { | |
635 | printk(" io base address required\n"); | |
636 | return -EINVAL; | |
637 | } | |
638 | ||
639 | /* check if io addresses are available */ | |
640 | if (!request_region(iobase, DAS1800_SIZE, driver_das1800.driver_name)) { | |
0a85b6f0 MT |
641 | printk |
642 | (" I/O port conflict: failed to allocate ports 0x%lx to 0x%lx\n", | |
643 | iobase, iobase + DAS1800_SIZE - 1); | |
a69cc3a9 FMH |
644 | return -EIO; |
645 | } | |
646 | dev->iobase = iobase; | |
647 | ||
648 | board = das1800_probe(dev); | |
649 | if (board < 0) { | |
650 | printk(" unable to determine board type\n"); | |
651 | return -ENODEV; | |
652 | } | |
653 | ||
654 | dev->board_ptr = das1800_boards + board; | |
655 | dev->board_name = thisboard->name; | |
656 | ||
a351ecf3 | 657 | /* if it is an 'ao' board with fancy analog out then we need extra io ports */ |
a69cc3a9 FMH |
658 | if (thisboard->ao_ability == 2) { |
659 | iobase2 = iobase + IOBASE2; | |
660 | if (!request_region(iobase2, DAS1800_SIZE, | |
0a85b6f0 MT |
661 | driver_das1800.driver_name)) { |
662 | printk | |
663 | (" I/O port conflict: failed to allocate ports 0x%lx to 0x%lx\n", | |
664 | iobase2, iobase2 + DAS1800_SIZE - 1); | |
a69cc3a9 FMH |
665 | return -EIO; |
666 | } | |
667 | devpriv->iobase2 = iobase2; | |
668 | } | |
669 | ||
670 | /* grab our IRQ */ | |
671 | if (irq) { | |
5f74ea14 | 672 | if (request_irq(irq, das1800_interrupt, 0, |
a69cc3a9 FMH |
673 | driver_das1800.driver_name, dev)) { |
674 | printk(" unable to allocate irq %u\n", irq); | |
675 | return -EINVAL; | |
676 | } | |
677 | } | |
678 | dev->irq = irq; | |
679 | ||
a351ecf3 | 680 | /* set bits that tell card which irq to use */ |
a69cc3a9 FMH |
681 | switch (irq) { |
682 | case 0: | |
683 | break; | |
684 | case 3: | |
685 | devpriv->irq_dma_bits |= 0x8; | |
686 | break; | |
687 | case 5: | |
688 | devpriv->irq_dma_bits |= 0x10; | |
689 | break; | |
690 | case 7: | |
691 | devpriv->irq_dma_bits |= 0x18; | |
692 | break; | |
693 | case 10: | |
694 | devpriv->irq_dma_bits |= 0x28; | |
695 | break; | |
696 | case 11: | |
697 | devpriv->irq_dma_bits |= 0x30; | |
698 | break; | |
699 | case 15: | |
700 | devpriv->irq_dma_bits |= 0x38; | |
701 | break; | |
702 | default: | |
703 | printk(" irq out of range\n"); | |
704 | return -EINVAL; | |
705 | break; | |
706 | } | |
707 | ||
708 | retval = das1800_init_dma(dev, dma0, dma1); | |
709 | if (retval < 0) | |
710 | return retval; | |
711 | ||
712 | if (devpriv->ai_buf0 == NULL) { | |
713 | devpriv->ai_buf0 = | |
0a85b6f0 | 714 | kmalloc(FIFO_SIZE * sizeof(uint16_t), GFP_KERNEL); |
a69cc3a9 FMH |
715 | if (devpriv->ai_buf0 == NULL) |
716 | return -ENOMEM; | |
717 | } | |
718 | ||
719 | if (alloc_subdevices(dev, 4) < 0) | |
720 | return -ENOMEM; | |
721 | ||
722 | /* analog input subdevice */ | |
723 | s = dev->subdevices + 0; | |
724 | dev->read_subdev = s; | |
725 | s->type = COMEDI_SUBD_AI; | |
726 | s->subdev_flags = SDF_READABLE | SDF_DIFF | SDF_GROUND | SDF_CMD_READ; | |
727 | if (thisboard->common) | |
728 | s->subdev_flags |= SDF_COMMON; | |
729 | s->n_chan = thisboard->qram_len; | |
730 | s->len_chanlist = thisboard->qram_len; | |
731 | s->maxdata = (1 << thisboard->resolution) - 1; | |
732 | s->range_table = thisboard->range_ai; | |
733 | s->do_cmd = das1800_ai_do_cmd; | |
734 | s->do_cmdtest = das1800_ai_do_cmdtest; | |
735 | s->insn_read = das1800_ai_rinsn; | |
736 | s->poll = das1800_ai_poll; | |
737 | s->cancel = das1800_cancel; | |
738 | ||
739 | /* analog out */ | |
740 | s = dev->subdevices + 1; | |
741 | if (thisboard->ao_ability == 1) { | |
742 | s->type = COMEDI_SUBD_AO; | |
743 | s->subdev_flags = SDF_WRITABLE; | |
744 | s->n_chan = thisboard->ao_n_chan; | |
745 | s->maxdata = (1 << thisboard->resolution) - 1; | |
746 | s->range_table = &range_ao_1; | |
747 | s->insn_write = das1800_ao_winsn; | |
748 | } else { | |
749 | s->type = COMEDI_SUBD_UNUSED; | |
750 | } | |
751 | ||
752 | /* di */ | |
753 | s = dev->subdevices + 2; | |
754 | s->type = COMEDI_SUBD_DI; | |
755 | s->subdev_flags = SDF_READABLE; | |
756 | s->n_chan = 4; | |
757 | s->maxdata = 1; | |
758 | s->range_table = &range_digital; | |
759 | s->insn_bits = das1800_di_rbits; | |
760 | ||
761 | /* do */ | |
762 | s = dev->subdevices + 3; | |
763 | s->type = COMEDI_SUBD_DO; | |
764 | s->subdev_flags = SDF_WRITABLE | SDF_READABLE; | |
765 | s->n_chan = thisboard->do_n_chan; | |
766 | s->maxdata = 1; | |
767 | s->range_table = &range_digital; | |
768 | s->insn_bits = das1800_do_wbits; | |
769 | ||
770 | das1800_cancel(dev, dev->read_subdev); | |
771 | ||
a351ecf3 | 772 | /* initialize digital out channels */ |
a69cc3a9 FMH |
773 | outb(devpriv->do_bits, dev->iobase + DAS1800_DIGITAL); |
774 | ||
a351ecf3 | 775 | /* initialize analog out channels */ |
a69cc3a9 | 776 | if (thisboard->ao_ability == 1) { |
a351ecf3 | 777 | /* select 'update' dac channel for baseAddress + 0x0 */ |
a69cc3a9 | 778 | outb(DAC(thisboard->ao_n_chan - 1), |
0a85b6f0 | 779 | dev->iobase + DAS1800_SELECT); |
a69cc3a9 FMH |
780 | outw(devpriv->ao_update_bits, dev->iobase + DAS1800_DAC); |
781 | } | |
782 | ||
783 | return 0; | |
784 | }; | |
785 | ||
da91b269 | 786 | static int das1800_detach(struct comedi_device *dev) |
a69cc3a9 FMH |
787 | { |
788 | /* only free stuff if it has been allocated by _attach */ | |
789 | if (dev->iobase) | |
790 | release_region(dev->iobase, DAS1800_SIZE); | |
791 | if (dev->irq) | |
5f74ea14 | 792 | free_irq(dev->irq, dev); |
a69cc3a9 FMH |
793 | if (dev->private) { |
794 | if (devpriv->iobase2) | |
795 | release_region(devpriv->iobase2, DAS1800_SIZE); | |
796 | if (devpriv->dma0) | |
797 | free_dma(devpriv->dma0); | |
798 | if (devpriv->dma1) | |
799 | free_dma(devpriv->dma1); | |
800 | if (devpriv->ai_buf0) | |
801 | kfree(devpriv->ai_buf0); | |
802 | if (devpriv->ai_buf1) | |
803 | kfree(devpriv->ai_buf1); | |
804 | } | |
805 | ||
806 | printk("comedi%d: %s: remove\n", dev->minor, | |
0a85b6f0 | 807 | driver_das1800.driver_name); |
a69cc3a9 FMH |
808 | |
809 | return 0; | |
810 | }; | |
811 | ||
812 | /* probes and checks das-1800 series board type | |
813 | */ | |
da91b269 | 814 | static int das1800_probe(struct comedi_device *dev) |
a69cc3a9 FMH |
815 | { |
816 | int id; | |
817 | int board; | |
818 | ||
819 | id = (inb(dev->iobase + DAS1800_DIGITAL) >> 4) & 0xf; /* get id bits */ | |
0a85b6f0 | 820 | board = ((struct das1800_board *)dev->board_ptr) - das1800_boards; |
a69cc3a9 FMH |
821 | |
822 | switch (id) { | |
823 | case 0x3: | |
824 | if (board == das1801st_da || board == das1802st_da || | |
0a85b6f0 | 825 | board == das1701st_da || board == das1702st_da) { |
a69cc3a9 | 826 | printk(" Board model: %s\n", |
0a85b6f0 | 827 | das1800_boards[board].name); |
a69cc3a9 FMH |
828 | return board; |
829 | } | |
0a85b6f0 MT |
830 | printk |
831 | (" Board model (probed, not recommended): das-1800st-da series\n"); | |
a69cc3a9 FMH |
832 | return das1801st; |
833 | break; | |
834 | case 0x4: | |
835 | if (board == das1802hr_da || board == das1702hr_da) { | |
836 | printk(" Board model: %s\n", | |
0a85b6f0 | 837 | das1800_boards[board].name); |
a69cc3a9 FMH |
838 | return board; |
839 | } | |
0a85b6f0 MT |
840 | printk |
841 | (" Board model (probed, not recommended): das-1802hr-da\n"); | |
a69cc3a9 FMH |
842 | return das1802hr; |
843 | break; | |
844 | case 0x5: | |
845 | if (board == das1801ao || board == das1802ao || | |
0a85b6f0 | 846 | board == das1701ao || board == das1702ao) { |
a69cc3a9 | 847 | printk(" Board model: %s\n", |
0a85b6f0 | 848 | das1800_boards[board].name); |
a69cc3a9 FMH |
849 | return board; |
850 | } | |
0a85b6f0 MT |
851 | printk |
852 | (" Board model (probed, not recommended): das-1800ao series\n"); | |
a69cc3a9 FMH |
853 | return das1801ao; |
854 | break; | |
855 | case 0x6: | |
856 | if (board == das1802hr || board == das1702hr) { | |
857 | printk(" Board model: %s\n", | |
0a85b6f0 | 858 | das1800_boards[board].name); |
a69cc3a9 FMH |
859 | return board; |
860 | } | |
861 | printk(" Board model (probed, not recommended): das-1802hr\n"); | |
862 | return das1802hr; | |
863 | break; | |
864 | case 0x7: | |
865 | if (board == das1801st || board == das1802st || | |
0a85b6f0 | 866 | board == das1701st || board == das1702st) { |
a69cc3a9 | 867 | printk(" Board model: %s\n", |
0a85b6f0 | 868 | das1800_boards[board].name); |
a69cc3a9 FMH |
869 | return board; |
870 | } | |
0a85b6f0 MT |
871 | printk |
872 | (" Board model (probed, not recommended): das-1800st series\n"); | |
a69cc3a9 FMH |
873 | return das1801st; |
874 | break; | |
875 | case 0x8: | |
876 | if (board == das1801hc || board == das1802hc) { | |
877 | printk(" Board model: %s\n", | |
0a85b6f0 | 878 | das1800_boards[board].name); |
a69cc3a9 FMH |
879 | return board; |
880 | } | |
0a85b6f0 MT |
881 | printk |
882 | (" Board model (probed, not recommended): das-1800hc series\n"); | |
a69cc3a9 FMH |
883 | return das1801hc; |
884 | break; | |
885 | default: | |
0a85b6f0 MT |
886 | printk |
887 | (" Board model: probe returned 0x%x (unknown, please report)\n", | |
888 | id); | |
a69cc3a9 FMH |
889 | return board; |
890 | break; | |
891 | } | |
892 | return -1; | |
893 | } | |
894 | ||
0a85b6f0 MT |
895 | static int das1800_ai_poll(struct comedi_device *dev, |
896 | struct comedi_subdevice *s) | |
a69cc3a9 FMH |
897 | { |
898 | unsigned long flags; | |
899 | ||
a351ecf3 | 900 | /* prevent race with interrupt handler */ |
5f74ea14 | 901 | spin_lock_irqsave(&dev->spinlock, flags); |
a69cc3a9 | 902 | das1800_ai_handler(dev); |
5f74ea14 | 903 | spin_unlock_irqrestore(&dev->spinlock, flags); |
a69cc3a9 FMH |
904 | |
905 | return s->async->buf_write_count - s->async->buf_read_count; | |
906 | } | |
907 | ||
70265d24 | 908 | static irqreturn_t das1800_interrupt(int irq, void *d) |
a69cc3a9 | 909 | { |
71b5f4f1 | 910 | struct comedi_device *dev = d; |
a69cc3a9 FMH |
911 | unsigned int status; |
912 | ||
913 | if (dev->attached == 0) { | |
914 | comedi_error(dev, "premature interrupt"); | |
915 | return IRQ_HANDLED; | |
916 | } | |
917 | ||
918 | /* Prevent race with das1800_ai_poll() on multi processor systems. | |
919 | * Also protects indirect addressing in das1800_ai_handler */ | |
920 | spin_lock(&dev->spinlock); | |
921 | status = inb(dev->iobase + DAS1800_STATUS); | |
922 | ||
923 | /* if interrupt was not caused by das-1800 */ | |
924 | if (!(status & INT)) { | |
925 | spin_unlock(&dev->spinlock); | |
926 | return IRQ_NONE; | |
927 | } | |
928 | /* clear the interrupt status bit INT */ | |
929 | outb(CLEAR_INTR_MASK & ~INT, dev->iobase + DAS1800_STATUS); | |
a351ecf3 | 930 | /* handle interrupt */ |
a69cc3a9 FMH |
931 | das1800_ai_handler(dev); |
932 | ||
933 | spin_unlock(&dev->spinlock); | |
934 | return IRQ_HANDLED; | |
935 | } | |
936 | ||
a351ecf3 | 937 | /* the guts of the interrupt handler, that is shared with das1800_ai_poll */ |
da91b269 | 938 | static void das1800_ai_handler(struct comedi_device *dev) |
a69cc3a9 | 939 | { |
34c43922 | 940 | struct comedi_subdevice *s = dev->subdevices + 0; /* analog input subdevice */ |
d163679c | 941 | struct comedi_async *async = s->async; |
ea6d0d4c | 942 | struct comedi_cmd *cmd = &async->cmd; |
a69cc3a9 FMH |
943 | unsigned int status = inb(dev->iobase + DAS1800_STATUS); |
944 | ||
945 | async->events = 0; | |
a351ecf3 | 946 | /* select adc for base address + 0 */ |
a69cc3a9 | 947 | outb(ADC, dev->iobase + DAS1800_SELECT); |
a351ecf3 | 948 | /* dma buffer full */ |
a69cc3a9 | 949 | if (devpriv->irq_dma_bits & DMA_ENABLED) { |
a351ecf3 | 950 | /* look for data from dma transfer even if dma terminal count hasn't happened yet */ |
a69cc3a9 | 951 | das1800_handle_dma(dev, s, status); |
a351ecf3 | 952 | } else if (status & FHF) { /* if fifo half full */ |
a69cc3a9 | 953 | das1800_handle_fifo_half_full(dev, s); |
a351ecf3 | 954 | } else if (status & FNE) { /* if fifo not empty */ |
a69cc3a9 FMH |
955 | das1800_handle_fifo_not_empty(dev, s); |
956 | } | |
957 | ||
958 | async->events |= COMEDI_CB_BLOCK; | |
959 | /* if the card's fifo has overflowed */ | |
960 | if (status & OVF) { | |
a351ecf3 | 961 | /* clear OVF interrupt bit */ |
a69cc3a9 FMH |
962 | outb(CLEAR_INTR_MASK & ~OVF, dev->iobase + DAS1800_STATUS); |
963 | comedi_error(dev, "DAS1800 FIFO overflow"); | |
964 | das1800_cancel(dev, s); | |
965 | async->events |= COMEDI_CB_ERROR | COMEDI_CB_EOA; | |
966 | comedi_event(dev, s); | |
967 | return; | |
968 | } | |
a351ecf3 | 969 | /* stop taking data if appropriate */ |
a69cc3a9 FMH |
970 | /* stop_src TRIG_EXT */ |
971 | if (status & CT0TC) { | |
a351ecf3 | 972 | /* clear CT0TC interrupt bit */ |
a69cc3a9 | 973 | outb(CLEAR_INTR_MASK & ~CT0TC, dev->iobase + DAS1800_STATUS); |
a351ecf3 | 974 | /* make sure we get all remaining data from board before quitting */ |
a69cc3a9 FMH |
975 | if (devpriv->irq_dma_bits & DMA_ENABLED) |
976 | das1800_flush_dma(dev, s); | |
977 | else | |
978 | das1800_handle_fifo_not_empty(dev, s); | |
979 | das1800_cancel(dev, s); /* disable hardware conversions */ | |
980 | async->events |= COMEDI_CB_EOA; | |
a351ecf3 | 981 | } else if (cmd->stop_src == TRIG_COUNT && devpriv->count == 0) { /* stop_src TRIG_COUNT */ |
a69cc3a9 FMH |
982 | das1800_cancel(dev, s); /* disable hardware conversions */ |
983 | async->events |= COMEDI_CB_EOA; | |
984 | } | |
985 | ||
986 | comedi_event(dev, s); | |
987 | ||
988 | return; | |
989 | } | |
990 | ||
0a85b6f0 MT |
991 | static void das1800_handle_dma(struct comedi_device *dev, |
992 | struct comedi_subdevice *s, unsigned int status) | |
a69cc3a9 FMH |
993 | { |
994 | unsigned long flags; | |
995 | const int dual_dma = devpriv->irq_dma_bits & DMA_DUAL; | |
996 | ||
997 | flags = claim_dma_lock(); | |
998 | das1800_flush_dma_channel(dev, s, devpriv->dma_current, | |
0a85b6f0 | 999 | devpriv->dma_current_buf); |
a351ecf3 | 1000 | /* re-enable dma channel */ |
a69cc3a9 | 1001 | set_dma_addr(devpriv->dma_current, |
0a85b6f0 | 1002 | virt_to_bus(devpriv->dma_current_buf)); |
a69cc3a9 FMH |
1003 | set_dma_count(devpriv->dma_current, devpriv->dma_transfer_size); |
1004 | enable_dma(devpriv->dma_current); | |
1005 | release_dma_lock(flags); | |
1006 | ||
1007 | if (status & DMATC) { | |
a351ecf3 | 1008 | /* clear DMATC interrupt bit */ |
a69cc3a9 | 1009 | outb(CLEAR_INTR_MASK & ~DMATC, dev->iobase + DAS1800_STATUS); |
a351ecf3 | 1010 | /* switch dma channels for next time, if appropriate */ |
a69cc3a9 | 1011 | if (dual_dma) { |
a351ecf3 | 1012 | /* read data from the other channel next time */ |
a69cc3a9 FMH |
1013 | if (devpriv->dma_current == devpriv->dma0) { |
1014 | devpriv->dma_current = devpriv->dma1; | |
1015 | devpriv->dma_current_buf = devpriv->ai_buf1; | |
1016 | } else { | |
1017 | devpriv->dma_current = devpriv->dma0; | |
1018 | devpriv->dma_current_buf = devpriv->ai_buf0; | |
1019 | } | |
1020 | } | |
1021 | } | |
1022 | ||
1023 | return; | |
1024 | } | |
1025 | ||
da91b269 | 1026 | static inline uint16_t munge_bipolar_sample(const struct comedi_device *dev, |
0a85b6f0 | 1027 | uint16_t sample) |
a69cc3a9 FMH |
1028 | { |
1029 | sample += 1 << (thisboard->resolution - 1); | |
1030 | return sample; | |
1031 | } | |
1032 | ||
0a85b6f0 MT |
1033 | static void munge_data(struct comedi_device *dev, uint16_t * array, |
1034 | unsigned int num_elements) | |
a69cc3a9 FMH |
1035 | { |
1036 | unsigned int i; | |
1037 | int unipolar; | |
1038 | ||
1039 | /* see if card is using a unipolar or bipolar range so we can munge data correctly */ | |
1040 | unipolar = inb(dev->iobase + DAS1800_CONTROL_C) & UB; | |
1041 | ||
1042 | /* convert to unsigned type if we are in a bipolar mode */ | |
1043 | if (!unipolar) { | |
1044 | for (i = 0; i < num_elements; i++) { | |
1045 | array[i] = munge_bipolar_sample(dev, array[i]); | |
1046 | } | |
1047 | } | |
1048 | } | |
1049 | ||
1050 | /* Utility function used by das1800_flush_dma() and das1800_handle_dma(). | |
1051 | * Assumes dma lock is held */ | |
0a85b6f0 MT |
1052 | static void das1800_flush_dma_channel(struct comedi_device *dev, |
1053 | struct comedi_subdevice *s, | |
1054 | unsigned int channel, uint16_t * buffer) | |
a69cc3a9 FMH |
1055 | { |
1056 | unsigned int num_bytes, num_samples; | |
ea6d0d4c | 1057 | struct comedi_cmd *cmd = &s->async->cmd; |
a69cc3a9 FMH |
1058 | |
1059 | disable_dma(channel); | |
1060 | ||
1061 | /* clear flip-flop to make sure 2-byte registers | |
1062 | * get set correctly */ | |
1063 | clear_dma_ff(channel); | |
1064 | ||
a351ecf3 | 1065 | /* figure out how many points to read */ |
a69cc3a9 | 1066 | num_bytes = devpriv->dma_transfer_size - get_dma_residue(channel); |
790c5541 | 1067 | num_samples = num_bytes / sizeof(short); |
a69cc3a9 FMH |
1068 | |
1069 | /* if we only need some of the points */ | |
1070 | if (cmd->stop_src == TRIG_COUNT && devpriv->count < num_samples) | |
1071 | num_samples = devpriv->count; | |
1072 | ||
1073 | munge_data(dev, buffer, num_samples); | |
1074 | cfc_write_array_to_buffer(s, buffer, num_bytes); | |
1075 | if (s->async->cmd.stop_src == TRIG_COUNT) | |
1076 | devpriv->count -= num_samples; | |
1077 | ||
1078 | return; | |
1079 | } | |
1080 | ||
1081 | /* flushes remaining data from board when external trigger has stopped aquisition | |
1082 | * and we are using dma transfers */ | |
0a85b6f0 MT |
1083 | static void das1800_flush_dma(struct comedi_device *dev, |
1084 | struct comedi_subdevice *s) | |
a69cc3a9 FMH |
1085 | { |
1086 | unsigned long flags; | |
1087 | const int dual_dma = devpriv->irq_dma_bits & DMA_DUAL; | |
1088 | ||
1089 | flags = claim_dma_lock(); | |
1090 | das1800_flush_dma_channel(dev, s, devpriv->dma_current, | |
0a85b6f0 | 1091 | devpriv->dma_current_buf); |
a69cc3a9 FMH |
1092 | |
1093 | if (dual_dma) { | |
a351ecf3 | 1094 | /* switch to other channel and flush it */ |
a69cc3a9 FMH |
1095 | if (devpriv->dma_current == devpriv->dma0) { |
1096 | devpriv->dma_current = devpriv->dma1; | |
1097 | devpriv->dma_current_buf = devpriv->ai_buf1; | |
1098 | } else { | |
1099 | devpriv->dma_current = devpriv->dma0; | |
1100 | devpriv->dma_current_buf = devpriv->ai_buf0; | |
1101 | } | |
1102 | das1800_flush_dma_channel(dev, s, devpriv->dma_current, | |
0a85b6f0 | 1103 | devpriv->dma_current_buf); |
a69cc3a9 FMH |
1104 | } |
1105 | ||
1106 | release_dma_lock(flags); | |
1107 | ||
a351ecf3 | 1108 | /* get any remaining samples in fifo */ |
a69cc3a9 FMH |
1109 | das1800_handle_fifo_not_empty(dev, s); |
1110 | ||
1111 | return; | |
1112 | } | |
1113 | ||
da91b269 | 1114 | static void das1800_handle_fifo_half_full(struct comedi_device *dev, |
0a85b6f0 | 1115 | struct comedi_subdevice *s) |
a69cc3a9 FMH |
1116 | { |
1117 | int numPoints = 0; /* number of points to read */ | |
ea6d0d4c | 1118 | struct comedi_cmd *cmd = &s->async->cmd; |
a69cc3a9 FMH |
1119 | |
1120 | numPoints = FIFO_SIZE / 2; | |
1121 | /* if we only need some of the points */ | |
1122 | if (cmd->stop_src == TRIG_COUNT && devpriv->count < numPoints) | |
1123 | numPoints = devpriv->count; | |
1124 | insw(dev->iobase + DAS1800_FIFO, devpriv->ai_buf0, numPoints); | |
1125 | munge_data(dev, devpriv->ai_buf0, numPoints); | |
1126 | cfc_write_array_to_buffer(s, devpriv->ai_buf0, | |
0a85b6f0 | 1127 | numPoints * sizeof(devpriv->ai_buf0[0])); |
a69cc3a9 FMH |
1128 | if (cmd->stop_src == TRIG_COUNT) |
1129 | devpriv->count -= numPoints; | |
1130 | return; | |
1131 | } | |
1132 | ||
da91b269 | 1133 | static void das1800_handle_fifo_not_empty(struct comedi_device *dev, |
0a85b6f0 | 1134 | struct comedi_subdevice *s) |
a69cc3a9 | 1135 | { |
790c5541 | 1136 | short dpnt; |
a69cc3a9 | 1137 | int unipolar; |
ea6d0d4c | 1138 | struct comedi_cmd *cmd = &s->async->cmd; |
a69cc3a9 FMH |
1139 | |
1140 | unipolar = inb(dev->iobase + DAS1800_CONTROL_C) & UB; | |
1141 | ||
1142 | while (inb(dev->iobase + DAS1800_STATUS) & FNE) { | |
1143 | if (cmd->stop_src == TRIG_COUNT && devpriv->count == 0) | |
1144 | break; | |
1145 | dpnt = inw(dev->iobase + DAS1800_FIFO); | |
1146 | /* convert to unsigned type if we are in a bipolar mode */ | |
1147 | if (!unipolar) ; | |
1148 | dpnt = munge_bipolar_sample(dev, dpnt); | |
1149 | cfc_write_to_buffer(s, dpnt); | |
1150 | if (cmd->stop_src == TRIG_COUNT) | |
1151 | devpriv->count--; | |
1152 | } | |
1153 | ||
1154 | return; | |
1155 | } | |
1156 | ||
da91b269 | 1157 | static int das1800_cancel(struct comedi_device *dev, struct comedi_subdevice *s) |
a69cc3a9 FMH |
1158 | { |
1159 | outb(0x0, dev->iobase + DAS1800_STATUS); /* disable conversions */ | |
1160 | outb(0x0, dev->iobase + DAS1800_CONTROL_B); /* disable interrupts and dma */ | |
1161 | outb(0x0, dev->iobase + DAS1800_CONTROL_A); /* disable and clear fifo and stop triggering */ | |
1162 | if (devpriv->dma0) | |
1163 | disable_dma(devpriv->dma0); | |
1164 | if (devpriv->dma1) | |
1165 | disable_dma(devpriv->dma1); | |
1166 | return 0; | |
1167 | } | |
1168 | ||
1169 | /* test analog input cmd */ | |
0a85b6f0 MT |
1170 | static int das1800_ai_do_cmdtest(struct comedi_device *dev, |
1171 | struct comedi_subdevice *s, | |
1172 | struct comedi_cmd *cmd) | |
a69cc3a9 FMH |
1173 | { |
1174 | int err = 0; | |
1175 | int tmp; | |
1176 | unsigned int tmp_arg; | |
1177 | int i; | |
1178 | int unipolar; | |
1179 | ||
1180 | /* step 1: make sure trigger sources are trivially valid */ | |
1181 | ||
1182 | tmp = cmd->start_src; | |
1183 | cmd->start_src &= TRIG_NOW | TRIG_EXT; | |
1184 | if (!cmd->start_src || tmp != cmd->start_src) | |
1185 | err++; | |
1186 | ||
1187 | tmp = cmd->scan_begin_src; | |
1188 | cmd->scan_begin_src &= TRIG_FOLLOW | TRIG_TIMER | TRIG_EXT; | |
1189 | if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src) | |
1190 | err++; | |
1191 | ||
1192 | tmp = cmd->convert_src; | |
1193 | cmd->convert_src &= TRIG_TIMER | TRIG_EXT; | |
1194 | if (!cmd->convert_src || tmp != cmd->convert_src) | |
1195 | err++; | |
1196 | ||
1197 | tmp = cmd->scan_end_src; | |
1198 | cmd->scan_end_src &= TRIG_COUNT; | |
1199 | if (!cmd->scan_end_src || tmp != cmd->scan_end_src) | |
1200 | err++; | |
1201 | ||
1202 | tmp = cmd->stop_src; | |
1203 | cmd->stop_src &= TRIG_COUNT | TRIG_EXT | TRIG_NONE; | |
1204 | if (!cmd->stop_src || tmp != cmd->stop_src) | |
1205 | err++; | |
1206 | ||
1207 | if (err) | |
1208 | return 1; | |
1209 | ||
1210 | /* step 2: make sure trigger sources are unique and mutually compatible */ | |
1211 | ||
a351ecf3 | 1212 | /* uniqueness check */ |
a69cc3a9 FMH |
1213 | if (cmd->start_src != TRIG_NOW && cmd->start_src != TRIG_EXT) |
1214 | err++; | |
1215 | if (cmd->scan_begin_src != TRIG_FOLLOW && | |
0a85b6f0 MT |
1216 | cmd->scan_begin_src != TRIG_TIMER && |
1217 | cmd->scan_begin_src != TRIG_EXT) | |
a69cc3a9 FMH |
1218 | err++; |
1219 | if (cmd->convert_src != TRIG_TIMER && cmd->convert_src != TRIG_EXT) | |
1220 | err++; | |
1221 | if (cmd->stop_src != TRIG_COUNT && | |
0a85b6f0 | 1222 | cmd->stop_src != TRIG_NONE && cmd->stop_src != TRIG_EXT) |
a69cc3a9 | 1223 | err++; |
a351ecf3 | 1224 | /* compatibility check */ |
a69cc3a9 | 1225 | if (cmd->scan_begin_src != TRIG_FOLLOW && |
0a85b6f0 | 1226 | cmd->convert_src != TRIG_TIMER) |
a69cc3a9 FMH |
1227 | err++; |
1228 | ||
1229 | if (err) | |
1230 | return 2; | |
1231 | ||
1232 | /* step 3: make sure arguments are trivially compatible */ | |
1233 | ||
1234 | if (cmd->start_arg != 0) { | |
1235 | cmd->start_arg = 0; | |
1236 | err++; | |
1237 | } | |
1238 | if (cmd->convert_src == TRIG_TIMER) { | |
1239 | if (cmd->convert_arg < thisboard->ai_speed) { | |
1240 | cmd->convert_arg = thisboard->ai_speed; | |
1241 | err++; | |
1242 | } | |
1243 | } | |
1244 | if (!cmd->chanlist_len) { | |
1245 | cmd->chanlist_len = 1; | |
1246 | err++; | |
1247 | } | |
1248 | if (cmd->scan_end_arg != cmd->chanlist_len) { | |
1249 | cmd->scan_end_arg = cmd->chanlist_len; | |
1250 | err++; | |
1251 | } | |
1252 | ||
1253 | switch (cmd->stop_src) { | |
1254 | case TRIG_COUNT: | |
1255 | if (!cmd->stop_arg) { | |
1256 | cmd->stop_arg = 1; | |
1257 | err++; | |
1258 | } | |
1259 | break; | |
1260 | case TRIG_NONE: | |
1261 | if (cmd->stop_arg != 0) { | |
1262 | cmd->stop_arg = 0; | |
1263 | err++; | |
1264 | } | |
1265 | break; | |
1266 | default: | |
1267 | break; | |
1268 | } | |
1269 | ||
1270 | if (err) | |
1271 | return 3; | |
1272 | ||
1273 | /* step 4: fix up any arguments */ | |
1274 | ||
1275 | if (cmd->convert_src == TRIG_TIMER) { | |
a351ecf3 | 1276 | /* if we are not in burst mode */ |
a69cc3a9 FMH |
1277 | if (cmd->scan_begin_src == TRIG_FOLLOW) { |
1278 | tmp_arg = cmd->convert_arg; | |
1279 | /* calculate counter values that give desired timing */ | |
1280 | i8253_cascade_ns_to_timer_2div(TIMER_BASE, | |
0a85b6f0 MT |
1281 | &(devpriv->divisor1), |
1282 | &(devpriv->divisor2), | |
1283 | &(cmd->convert_arg), | |
1284 | cmd-> | |
1285 | flags & TRIG_ROUND_MASK); | |
a69cc3a9 FMH |
1286 | if (tmp_arg != cmd->convert_arg) |
1287 | err++; | |
1288 | } | |
a351ecf3 | 1289 | /* if we are in burst mode */ |
a69cc3a9 | 1290 | else { |
a351ecf3 | 1291 | /* check that convert_arg is compatible */ |
a69cc3a9 FMH |
1292 | tmp_arg = cmd->convert_arg; |
1293 | cmd->convert_arg = | |
0a85b6f0 MT |
1294 | burst_convert_arg(cmd->convert_arg, |
1295 | cmd->flags & TRIG_ROUND_MASK); | |
a69cc3a9 FMH |
1296 | if (tmp_arg != cmd->convert_arg) |
1297 | err++; | |
1298 | ||
1299 | if (cmd->scan_begin_src == TRIG_TIMER) { | |
a351ecf3 | 1300 | /* if scans are timed faster than conversion rate allows */ |
a69cc3a9 | 1301 | if (cmd->convert_arg * cmd->chanlist_len > |
0a85b6f0 | 1302 | cmd->scan_begin_arg) { |
a69cc3a9 | 1303 | cmd->scan_begin_arg = |
0a85b6f0 MT |
1304 | cmd->convert_arg * |
1305 | cmd->chanlist_len; | |
a69cc3a9 FMH |
1306 | err++; |
1307 | } | |
1308 | tmp_arg = cmd->scan_begin_arg; | |
1309 | /* calculate counter values that give desired timing */ | |
1310 | i8253_cascade_ns_to_timer_2div(TIMER_BASE, | |
0a85b6f0 MT |
1311 | &(devpriv-> |
1312 | divisor1), | |
1313 | &(devpriv-> | |
1314 | divisor2), | |
1315 | &(cmd-> | |
1316 | scan_begin_arg), | |
1317 | cmd-> | |
1318 | flags & | |
1319 | TRIG_ROUND_MASK); | |
a69cc3a9 FMH |
1320 | if (tmp_arg != cmd->scan_begin_arg) |
1321 | err++; | |
1322 | } | |
1323 | } | |
1324 | } | |
1325 | ||
1326 | if (err) | |
1327 | return 4; | |
1328 | ||
a351ecf3 | 1329 | /* make sure user is not trying to mix unipolar and bipolar ranges */ |
a69cc3a9 FMH |
1330 | if (cmd->chanlist) { |
1331 | unipolar = CR_RANGE(cmd->chanlist[0]) & UNIPOLAR; | |
1332 | for (i = 1; i < cmd->chanlist_len; i++) { | |
1333 | if (unipolar != (CR_RANGE(cmd->chanlist[i]) & UNIPOLAR)) { | |
1334 | comedi_error(dev, | |
0a85b6f0 | 1335 | "unipolar and bipolar ranges cannot be mixed in the chanlist"); |
a69cc3a9 FMH |
1336 | err++; |
1337 | break; | |
1338 | } | |
1339 | } | |
1340 | } | |
1341 | ||
1342 | if (err) | |
1343 | return 5; | |
1344 | ||
1345 | return 0; | |
1346 | } | |
1347 | ||
1348 | /* analog input cmd interface */ | |
1349 | ||
a351ecf3 | 1350 | /* first, some utility functions used in the main ai_do_cmd() */ |
a69cc3a9 | 1351 | |
a351ecf3 | 1352 | /* returns appropriate bits for control register a, depending on command */ |
ea6d0d4c | 1353 | static int control_a_bits(struct comedi_cmd cmd) |
a69cc3a9 FMH |
1354 | { |
1355 | int control_a; | |
1356 | ||
a351ecf3 | 1357 | control_a = FFEN; /* enable fifo */ |
a69cc3a9 FMH |
1358 | if (cmd.stop_src == TRIG_EXT) { |
1359 | control_a |= ATEN; | |
1360 | } | |
1361 | switch (cmd.start_src) { | |
1362 | case TRIG_EXT: | |
1363 | control_a |= TGEN | CGSL; | |
1364 | break; | |
1365 | case TRIG_NOW: | |
1366 | control_a |= CGEN; | |
1367 | break; | |
1368 | default: | |
1369 | break; | |
1370 | } | |
1371 | ||
1372 | return control_a; | |
1373 | } | |
1374 | ||
a351ecf3 | 1375 | /* returns appropriate bits for control register c, depending on command */ |
ea6d0d4c | 1376 | static int control_c_bits(struct comedi_cmd cmd) |
a69cc3a9 FMH |
1377 | { |
1378 | int control_c; | |
1379 | int aref; | |
1380 | ||
1381 | /* set clock source to internal or external, select analog reference, | |
1382 | * select unipolar / bipolar | |
1383 | */ | |
1384 | aref = CR_AREF(cmd.chanlist[0]); | |
a351ecf3 | 1385 | control_c = UQEN; /* enable upper qram addresses */ |
a69cc3a9 FMH |
1386 | if (aref != AREF_DIFF) |
1387 | control_c |= SD; | |
1388 | if (aref == AREF_COMMON) | |
1389 | control_c |= CMEN; | |
1390 | /* if a unipolar range was selected */ | |
1391 | if (CR_RANGE(cmd.chanlist[0]) & UNIPOLAR) | |
1392 | control_c |= UB; | |
1393 | switch (cmd.scan_begin_src) { | |
a351ecf3 | 1394 | case TRIG_FOLLOW: /* not in burst mode */ |
a69cc3a9 FMH |
1395 | switch (cmd.convert_src) { |
1396 | case TRIG_TIMER: | |
1397 | /* trig on cascaded counters */ | |
1398 | control_c |= IPCLK; | |
1399 | break; | |
1400 | case TRIG_EXT: | |
1401 | /* trig on falling edge of external trigger */ | |
1402 | control_c |= XPCLK; | |
1403 | break; | |
1404 | default: | |
1405 | break; | |
1406 | } | |
1407 | break; | |
1408 | case TRIG_TIMER: | |
a351ecf3 | 1409 | /* burst mode with internal pacer clock */ |
a69cc3a9 FMH |
1410 | control_c |= BMDE | IPCLK; |
1411 | break; | |
1412 | case TRIG_EXT: | |
a351ecf3 | 1413 | /* burst mode with external trigger */ |
a69cc3a9 FMH |
1414 | control_c |= BMDE | XPCLK; |
1415 | break; | |
1416 | default: | |
1417 | break; | |
1418 | } | |
1419 | ||
1420 | return control_c; | |
1421 | } | |
1422 | ||
a351ecf3 | 1423 | /* sets up counters */ |
da91b269 | 1424 | static int setup_counters(struct comedi_device *dev, struct comedi_cmd cmd) |
a69cc3a9 | 1425 | { |
a351ecf3 | 1426 | /* setup cascaded counters for conversion/scan frequency */ |
a69cc3a9 | 1427 | switch (cmd.scan_begin_src) { |
a351ecf3 | 1428 | case TRIG_FOLLOW: /* not in burst mode */ |
a69cc3a9 FMH |
1429 | if (cmd.convert_src == TRIG_TIMER) { |
1430 | /* set conversion frequency */ | |
1431 | i8253_cascade_ns_to_timer_2div(TIMER_BASE, | |
0a85b6f0 MT |
1432 | &(devpriv->divisor1), |
1433 | &(devpriv->divisor2), | |
1434 | &(cmd.convert_arg), | |
1435 | cmd. | |
1436 | flags & TRIG_ROUND_MASK); | |
a69cc3a9 FMH |
1437 | if (das1800_set_frequency(dev) < 0) { |
1438 | return -1; | |
1439 | } | |
1440 | } | |
1441 | break; | |
a351ecf3 | 1442 | case TRIG_TIMER: /* in burst mode */ |
a69cc3a9 FMH |
1443 | /* set scan frequency */ |
1444 | i8253_cascade_ns_to_timer_2div(TIMER_BASE, &(devpriv->divisor1), | |
0a85b6f0 MT |
1445 | &(devpriv->divisor2), |
1446 | &(cmd.scan_begin_arg), | |
1447 | cmd.flags & TRIG_ROUND_MASK); | |
a69cc3a9 FMH |
1448 | if (das1800_set_frequency(dev) < 0) { |
1449 | return -1; | |
1450 | } | |
1451 | break; | |
1452 | default: | |
1453 | break; | |
1454 | } | |
1455 | ||
a351ecf3 | 1456 | /* setup counter 0 for 'about triggering' */ |
a69cc3a9 | 1457 | if (cmd.stop_src == TRIG_EXT) { |
a351ecf3 | 1458 | /* load counter 0 in mode 0 */ |
a69cc3a9 FMH |
1459 | i8254_load(dev->iobase + DAS1800_COUNTER, 0, 0, 1, 0); |
1460 | } | |
1461 | ||
1462 | return 0; | |
1463 | } | |
1464 | ||
a351ecf3 | 1465 | /* sets up dma */ |
da91b269 | 1466 | static void setup_dma(struct comedi_device *dev, struct comedi_cmd cmd) |
a69cc3a9 FMH |
1467 | { |
1468 | unsigned long lock_flags; | |
1469 | const int dual_dma = devpriv->irq_dma_bits & DMA_DUAL; | |
1470 | ||
1471 | if ((devpriv->irq_dma_bits & DMA_ENABLED) == 0) | |
1472 | return; | |
1473 | ||
1474 | /* determine a reasonable dma transfer size */ | |
1475 | devpriv->dma_transfer_size = suggest_transfer_size(&cmd); | |
1476 | lock_flags = claim_dma_lock(); | |
1477 | disable_dma(devpriv->dma0); | |
1478 | /* clear flip-flop to make sure 2-byte registers for | |
1479 | * count and address get set correctly */ | |
1480 | clear_dma_ff(devpriv->dma0); | |
1481 | set_dma_addr(devpriv->dma0, virt_to_bus(devpriv->ai_buf0)); | |
a351ecf3 | 1482 | /* set appropriate size of transfer */ |
a69cc3a9 FMH |
1483 | set_dma_count(devpriv->dma0, devpriv->dma_transfer_size); |
1484 | devpriv->dma_current = devpriv->dma0; | |
1485 | devpriv->dma_current_buf = devpriv->ai_buf0; | |
1486 | enable_dma(devpriv->dma0); | |
a351ecf3 | 1487 | /* set up dual dma if appropriate */ |
a69cc3a9 FMH |
1488 | if (dual_dma) { |
1489 | disable_dma(devpriv->dma1); | |
1490 | /* clear flip-flop to make sure 2-byte registers for | |
1491 | * count and address get set correctly */ | |
1492 | clear_dma_ff(devpriv->dma1); | |
1493 | set_dma_addr(devpriv->dma1, virt_to_bus(devpriv->ai_buf1)); | |
a351ecf3 | 1494 | /* set appropriate size of transfer */ |
a69cc3a9 FMH |
1495 | set_dma_count(devpriv->dma1, devpriv->dma_transfer_size); |
1496 | enable_dma(devpriv->dma1); | |
1497 | } | |
1498 | release_dma_lock(lock_flags); | |
1499 | ||
1500 | return; | |
1501 | } | |
1502 | ||
a351ecf3 | 1503 | /* programs channel/gain list into card */ |
da91b269 | 1504 | static void program_chanlist(struct comedi_device *dev, struct comedi_cmd cmd) |
a69cc3a9 FMH |
1505 | { |
1506 | int i, n, chan_range; | |
1507 | unsigned long irq_flags; | |
a351ecf3 | 1508 | const int range_mask = 0x3; /* masks unipolar/bipolar bit off range */ |
a69cc3a9 FMH |
1509 | const int range_bitshift = 8; |
1510 | ||
1511 | n = cmd.chanlist_len; | |
a351ecf3 | 1512 | /* spinlock protects indirect addressing */ |
5f74ea14 | 1513 | spin_lock_irqsave(&dev->spinlock, irq_flags); |
a69cc3a9 FMH |
1514 | outb(QRAM, dev->iobase + DAS1800_SELECT); /* select QRAM for baseAddress + 0x0 */ |
1515 | outb(n - 1, dev->iobase + DAS1800_QRAM_ADDRESS); /*set QRAM address start */ | |
1516 | /* make channel / gain list */ | |
1517 | for (i = 0; i < n; i++) { | |
1518 | chan_range = | |
0a85b6f0 MT |
1519 | CR_CHAN(cmd. |
1520 | chanlist[i]) | ((CR_RANGE(cmd.chanlist[i]) & | |
1521 | range_mask) << range_bitshift); | |
a69cc3a9 FMH |
1522 | outw(chan_range, dev->iobase + DAS1800_QRAM); |
1523 | } | |
1524 | outb(n - 1, dev->iobase + DAS1800_QRAM_ADDRESS); /*finish write to QRAM */ | |
5f74ea14 | 1525 | spin_unlock_irqrestore(&dev->spinlock, irq_flags); |
a69cc3a9 FMH |
1526 | |
1527 | return; | |
1528 | } | |
1529 | ||
a351ecf3 | 1530 | /* analog input do_cmd */ |
0a85b6f0 MT |
1531 | static int das1800_ai_do_cmd(struct comedi_device *dev, |
1532 | struct comedi_subdevice *s) | |
a69cc3a9 FMH |
1533 | { |
1534 | int ret; | |
1535 | int control_a, control_c; | |
d163679c | 1536 | struct comedi_async *async = s->async; |
ea6d0d4c | 1537 | struct comedi_cmd cmd = async->cmd; |
a69cc3a9 FMH |
1538 | |
1539 | if (!dev->irq) { | |
1540 | comedi_error(dev, | |
0a85b6f0 | 1541 | "no irq assigned for das-1800, cannot do hardware conversions"); |
a69cc3a9 FMH |
1542 | return -1; |
1543 | } | |
1544 | ||
1545 | /* disable dma on TRIG_WAKE_EOS, or TRIG_RT | |
1546 | * (because dma in handler is unsafe at hard real-time priority) */ | |
1547 | if (cmd.flags & (TRIG_WAKE_EOS | TRIG_RT)) { | |
1548 | devpriv->irq_dma_bits &= ~DMA_ENABLED; | |
1549 | } else { | |
1550 | devpriv->irq_dma_bits |= devpriv->dma_bits; | |
1551 | } | |
a351ecf3 | 1552 | /* interrupt on end of conversion for TRIG_WAKE_EOS */ |
a69cc3a9 | 1553 | if (cmd.flags & TRIG_WAKE_EOS) { |
a351ecf3 | 1554 | /* interrupt fifo not empty */ |
a69cc3a9 FMH |
1555 | devpriv->irq_dma_bits &= ~FIMD; |
1556 | } else { | |
a351ecf3 | 1557 | /* interrupt fifo half full */ |
a69cc3a9 FMH |
1558 | devpriv->irq_dma_bits |= FIMD; |
1559 | } | |
a351ecf3 | 1560 | /* determine how many conversions we need */ |
a69cc3a9 FMH |
1561 | if (cmd.stop_src == TRIG_COUNT) { |
1562 | devpriv->count = cmd.stop_arg * cmd.chanlist_len; | |
1563 | } | |
1564 | ||
1565 | das1800_cancel(dev, s); | |
1566 | ||
a351ecf3 | 1567 | /* determine proper bits for control registers */ |
a69cc3a9 FMH |
1568 | control_a = control_a_bits(cmd); |
1569 | control_c = control_c_bits(cmd); | |
1570 | ||
1571 | /* setup card and start */ | |
1572 | program_chanlist(dev, cmd); | |
1573 | ret = setup_counters(dev, cmd); | |
1574 | if (ret < 0) { | |
1575 | comedi_error(dev, "Error setting up counters"); | |
1576 | return ret; | |
1577 | } | |
1578 | setup_dma(dev, cmd); | |
1579 | outb(control_c, dev->iobase + DAS1800_CONTROL_C); | |
a351ecf3 | 1580 | /* set conversion rate and length for burst mode */ |
a69cc3a9 | 1581 | if (control_c & BMDE) { |
a351ecf3 | 1582 | /* program conversion period with number of microseconds minus 1 */ |
a69cc3a9 | 1583 | outb(cmd.convert_arg / 1000 - 1, |
0a85b6f0 | 1584 | dev->iobase + DAS1800_BURST_RATE); |
a69cc3a9 FMH |
1585 | outb(cmd.chanlist_len - 1, dev->iobase + DAS1800_BURST_LENGTH); |
1586 | } | |
a351ecf3 | 1587 | outb(devpriv->irq_dma_bits, dev->iobase + DAS1800_CONTROL_B); /* enable irq/dma */ |
a69cc3a9 FMH |
1588 | outb(control_a, dev->iobase + DAS1800_CONTROL_A); /* enable fifo and triggering */ |
1589 | outb(CVEN, dev->iobase + DAS1800_STATUS); /* enable conversions */ | |
1590 | ||
1591 | return 0; | |
1592 | } | |
1593 | ||
1594 | /* read analog input */ | |
0a85b6f0 MT |
1595 | static int das1800_ai_rinsn(struct comedi_device *dev, |
1596 | struct comedi_subdevice *s, | |
1597 | struct comedi_insn *insn, unsigned int *data) | |
a69cc3a9 FMH |
1598 | { |
1599 | int i, n; | |
1600 | int chan, range, aref, chan_range; | |
1601 | int timeout = 1000; | |
1602 | short dpnt; | |
1603 | int conv_flags = 0; | |
1604 | unsigned long irq_flags; | |
1605 | ||
1606 | /* set up analog reference and unipolar / bipolar mode */ | |
1607 | aref = CR_AREF(insn->chanspec); | |
1608 | conv_flags |= UQEN; | |
1609 | if (aref != AREF_DIFF) | |
1610 | conv_flags |= SD; | |
1611 | if (aref == AREF_COMMON) | |
1612 | conv_flags |= CMEN; | |
1613 | /* if a unipolar range was selected */ | |
1614 | if (CR_RANGE(insn->chanspec) & UNIPOLAR) | |
1615 | conv_flags |= UB; | |
1616 | ||
1617 | outb(conv_flags, dev->iobase + DAS1800_CONTROL_C); /* software conversion enabled */ | |
1618 | outb(CVEN, dev->iobase + DAS1800_STATUS); /* enable conversions */ | |
1619 | outb(0x0, dev->iobase + DAS1800_CONTROL_A); /* reset fifo */ | |
1620 | outb(FFEN, dev->iobase + DAS1800_CONTROL_A); | |
1621 | ||
1622 | chan = CR_CHAN(insn->chanspec); | |
1623 | /* mask of unipolar/bipolar bit from range */ | |
1624 | range = CR_RANGE(insn->chanspec) & 0x3; | |
1625 | chan_range = chan | (range << 8); | |
5f74ea14 | 1626 | spin_lock_irqsave(&dev->spinlock, irq_flags); |
a69cc3a9 FMH |
1627 | outb(QRAM, dev->iobase + DAS1800_SELECT); /* select QRAM for baseAddress + 0x0 */ |
1628 | outb(0x0, dev->iobase + DAS1800_QRAM_ADDRESS); /* set QRAM address start */ | |
1629 | outw(chan_range, dev->iobase + DAS1800_QRAM); | |
1630 | outb(0x0, dev->iobase + DAS1800_QRAM_ADDRESS); /*finish write to QRAM */ | |
1631 | outb(ADC, dev->iobase + DAS1800_SELECT); /* select ADC for baseAddress + 0x0 */ | |
1632 | ||
1633 | for (n = 0; n < insn->n; n++) { | |
1634 | /* trigger conversion */ | |
1635 | outb(0, dev->iobase + DAS1800_FIFO); | |
1636 | for (i = 0; i < timeout; i++) { | |
1637 | if (inb(dev->iobase + DAS1800_STATUS) & FNE) | |
1638 | break; | |
1639 | } | |
1640 | if (i == timeout) { | |
1641 | comedi_error(dev, "timeout"); | |
1642 | return -ETIME; | |
1643 | } | |
1644 | dpnt = inw(dev->iobase + DAS1800_FIFO); | |
1645 | /* shift data to offset binary for bipolar ranges */ | |
1646 | if ((conv_flags & UB) == 0) | |
1647 | dpnt += 1 << (thisboard->resolution - 1); | |
1648 | data[n] = dpnt; | |
1649 | } | |
5f74ea14 | 1650 | spin_unlock_irqrestore(&dev->spinlock, irq_flags); |
a69cc3a9 FMH |
1651 | |
1652 | return n; | |
1653 | } | |
1654 | ||
1655 | /* writes to an analog output channel */ | |
0a85b6f0 MT |
1656 | static int das1800_ao_winsn(struct comedi_device *dev, |
1657 | struct comedi_subdevice *s, | |
1658 | struct comedi_insn *insn, unsigned int *data) | |
a69cc3a9 FMH |
1659 | { |
1660 | int chan = CR_CHAN(insn->chanspec); | |
a351ecf3 | 1661 | /* int range = CR_RANGE(insn->chanspec); */ |
a69cc3a9 FMH |
1662 | int update_chan = thisboard->ao_n_chan - 1; |
1663 | short output; | |
1664 | unsigned long irq_flags; | |
1665 | ||
a351ecf3 | 1666 | /* card expects two's complement data */ |
a69cc3a9 | 1667 | output = data[0] - (1 << (thisboard->resolution - 1)); |
a351ecf3 | 1668 | /* if the write is to the 'update' channel, we need to remember its value */ |
a69cc3a9 FMH |
1669 | if (chan == update_chan) |
1670 | devpriv->ao_update_bits = output; | |
a351ecf3 | 1671 | /* write to channel */ |
5f74ea14 | 1672 | spin_lock_irqsave(&dev->spinlock, irq_flags); |
a69cc3a9 FMH |
1673 | outb(DAC(chan), dev->iobase + DAS1800_SELECT); /* select dac channel for baseAddress + 0x0 */ |
1674 | outw(output, dev->iobase + DAS1800_DAC); | |
a351ecf3 | 1675 | /* now we need to write to 'update' channel to update all dac channels */ |
a69cc3a9 FMH |
1676 | if (chan != update_chan) { |
1677 | outb(DAC(update_chan), dev->iobase + DAS1800_SELECT); /* select 'update' channel for baseAddress + 0x0 */ | |
1678 | outw(devpriv->ao_update_bits, dev->iobase + DAS1800_DAC); | |
1679 | } | |
5f74ea14 | 1680 | spin_unlock_irqrestore(&dev->spinlock, irq_flags); |
a69cc3a9 FMH |
1681 | |
1682 | return 1; | |
1683 | } | |
1684 | ||
1685 | /* reads from digital input channels */ | |
0a85b6f0 MT |
1686 | static int das1800_di_rbits(struct comedi_device *dev, |
1687 | struct comedi_subdevice *s, | |
1688 | struct comedi_insn *insn, unsigned int *data) | |
a69cc3a9 FMH |
1689 | { |
1690 | ||
1691 | data[1] = inb(dev->iobase + DAS1800_DIGITAL) & 0xf; | |
1692 | data[0] = 0; | |
1693 | ||
1694 | return 2; | |
1695 | } | |
1696 | ||
1697 | /* writes to digital output channels */ | |
0a85b6f0 MT |
1698 | static int das1800_do_wbits(struct comedi_device *dev, |
1699 | struct comedi_subdevice *s, | |
1700 | struct comedi_insn *insn, unsigned int *data) | |
a69cc3a9 | 1701 | { |
790c5541 | 1702 | unsigned int wbits; |
a69cc3a9 | 1703 | |
a351ecf3 | 1704 | /* only set bits that have been masked */ |
a69cc3a9 FMH |
1705 | data[0] &= (1 << s->n_chan) - 1; |
1706 | wbits = devpriv->do_bits; | |
1707 | wbits &= ~data[0]; | |
1708 | wbits |= data[0] & data[1]; | |
1709 | devpriv->do_bits = wbits; | |
1710 | ||
1711 | outb(devpriv->do_bits, dev->iobase + DAS1800_DIGITAL); | |
1712 | ||
1713 | data[1] = devpriv->do_bits; | |
1714 | ||
1715 | return 2; | |
1716 | } | |
1717 | ||
1718 | /* loads counters with divisor1, divisor2 from private structure */ | |
da91b269 | 1719 | static int das1800_set_frequency(struct comedi_device *dev) |
a69cc3a9 FMH |
1720 | { |
1721 | int err = 0; | |
1722 | ||
a351ecf3 | 1723 | /* counter 1, mode 2 */ |
a69cc3a9 | 1724 | if (i8254_load(dev->iobase + DAS1800_COUNTER, 0, 1, devpriv->divisor1, |
0a85b6f0 | 1725 | 2)) |
a69cc3a9 | 1726 | err++; |
a351ecf3 | 1727 | /* counter 2, mode 2 */ |
a69cc3a9 | 1728 | if (i8254_load(dev->iobase + DAS1800_COUNTER, 0, 2, devpriv->divisor2, |
0a85b6f0 | 1729 | 2)) |
a69cc3a9 FMH |
1730 | err++; |
1731 | if (err) | |
1732 | return -1; | |
1733 | ||
1734 | return 0; | |
1735 | } | |
1736 | ||
1737 | /* converts requested conversion timing to timing compatible with | |
1738 | * hardware, used only when card is in 'burst mode' | |
1739 | */ | |
1740 | static unsigned int burst_convert_arg(unsigned int convert_arg, int round_mode) | |
1741 | { | |
1742 | unsigned int micro_sec; | |
1743 | ||
a351ecf3 | 1744 | /* in burst mode, the maximum conversion time is 64 microseconds */ |
a69cc3a9 FMH |
1745 | if (convert_arg > 64000) |
1746 | convert_arg = 64000; | |
1747 | ||
a351ecf3 | 1748 | /* the conversion time must be an integral number of microseconds */ |
a69cc3a9 FMH |
1749 | switch (round_mode) { |
1750 | case TRIG_ROUND_NEAREST: | |
1751 | default: | |
1752 | micro_sec = (convert_arg + 500) / 1000; | |
1753 | break; | |
1754 | case TRIG_ROUND_DOWN: | |
1755 | micro_sec = convert_arg / 1000; | |
1756 | break; | |
1757 | case TRIG_ROUND_UP: | |
1758 | micro_sec = (convert_arg - 1) / 1000 + 1; | |
1759 | break; | |
1760 | } | |
1761 | ||
a351ecf3 | 1762 | /* return number of nanoseconds */ |
a69cc3a9 FMH |
1763 | return micro_sec * 1000; |
1764 | } | |
1765 | ||
a351ecf3 | 1766 | /* utility function that suggests a dma transfer size based on the conversion period 'ns' */ |
da91b269 | 1767 | static unsigned int suggest_transfer_size(struct comedi_cmd *cmd) |
a69cc3a9 FMH |
1768 | { |
1769 | unsigned int size = DMA_BUF_SIZE; | |
a351ecf3 BP |
1770 | static const int sample_size = 2; /* size in bytes of one sample from board */ |
1771 | unsigned int fill_time = 300000000; /* target time in nanoseconds for filling dma buffer */ | |
1772 | unsigned int max_size; /* maximum size we will allow for a transfer */ | |
a69cc3a9 | 1773 | |
a351ecf3 | 1774 | /* make dma buffer fill in 0.3 seconds for timed modes */ |
a69cc3a9 | 1775 | switch (cmd->scan_begin_src) { |
a351ecf3 | 1776 | case TRIG_FOLLOW: /* not in burst mode */ |
a69cc3a9 FMH |
1777 | if (cmd->convert_src == TRIG_TIMER) |
1778 | size = (fill_time / cmd->convert_arg) * sample_size; | |
1779 | break; | |
1780 | case TRIG_TIMER: | |
1781 | size = (fill_time / (cmd->scan_begin_arg * cmd->chanlist_len)) * | |
0a85b6f0 | 1782 | sample_size; |
a69cc3a9 FMH |
1783 | break; |
1784 | default: | |
1785 | size = DMA_BUF_SIZE; | |
1786 | break; | |
1787 | } | |
1788 | ||
a351ecf3 | 1789 | /* set a minimum and maximum size allowed */ |
a69cc3a9 | 1790 | max_size = DMA_BUF_SIZE; |
a351ecf3 | 1791 | /* if we are taking limited number of conversions, limit transfer size to that */ |
a69cc3a9 | 1792 | if (cmd->stop_src == TRIG_COUNT && |
0a85b6f0 | 1793 | cmd->stop_arg * cmd->chanlist_len * sample_size < max_size) |
a69cc3a9 FMH |
1794 | max_size = cmd->stop_arg * cmd->chanlist_len * sample_size; |
1795 | ||
1796 | if (size > max_size) | |
1797 | size = max_size; | |
1798 | if (size < sample_size) | |
1799 | size = sample_size; | |
1800 | ||
1801 | return size; | |
1802 | } |