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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 | */ | |
7114a280 AT |
534 | static int __init driver_das1800_init_module(void) |
535 | { | |
536 | return comedi_driver_register(&driver_das1800); | |
537 | } | |
538 | ||
539 | static void __exit driver_das1800_cleanup_module(void) | |
540 | { | |
541 | comedi_driver_unregister(&driver_das1800); | |
542 | } | |
543 | ||
544 | module_init(driver_das1800_init_module); | |
545 | module_exit(driver_das1800_cleanup_module); | |
a69cc3a9 | 546 | |
da91b269 | 547 | static int das1800_init_dma(struct comedi_device *dev, unsigned int dma0, |
0a85b6f0 | 548 | unsigned int dma1) |
a69cc3a9 FMH |
549 | { |
550 | unsigned long flags; | |
551 | ||
a351ecf3 | 552 | /* need an irq to do dma */ |
a69cc3a9 | 553 | if (dev->irq && dma0) { |
a351ecf3 | 554 | /* encode dma0 and dma1 into 2 digit hexadecimal for switch */ |
a69cc3a9 | 555 | switch ((dma0 & 0x7) | (dma1 << 4)) { |
a351ecf3 | 556 | case 0x5: /* dma0 == 5 */ |
a69cc3a9 FMH |
557 | devpriv->dma_bits |= DMA_CH5; |
558 | break; | |
a351ecf3 | 559 | case 0x6: /* dma0 == 6 */ |
a69cc3a9 FMH |
560 | devpriv->dma_bits |= DMA_CH6; |
561 | break; | |
a351ecf3 | 562 | case 0x7: /* dma0 == 7 */ |
a69cc3a9 FMH |
563 | devpriv->dma_bits |= DMA_CH7; |
564 | break; | |
a351ecf3 | 565 | case 0x65: /* dma0 == 5, dma1 == 6 */ |
a69cc3a9 FMH |
566 | devpriv->dma_bits |= DMA_CH5_CH6; |
567 | break; | |
a351ecf3 | 568 | case 0x76: /* dma0 == 6, dma1 == 7 */ |
a69cc3a9 FMH |
569 | devpriv->dma_bits |= DMA_CH6_CH7; |
570 | break; | |
a351ecf3 | 571 | case 0x57: /* dma0 == 7, dma1 == 5 */ |
a69cc3a9 FMH |
572 | devpriv->dma_bits |= DMA_CH7_CH5; |
573 | break; | |
574 | default: | |
575 | printk(" only supports dma channels 5 through 7\n" | |
0a85b6f0 MT |
576 | " Dual dma only allows the following combinations:\n" |
577 | " dma 5,6 / 6,7 / or 7,5\n"); | |
a69cc3a9 FMH |
578 | return -EINVAL; |
579 | break; | |
580 | } | |
581 | if (request_dma(dma0, driver_das1800.driver_name)) { | |
582 | printk(" failed to allocate dma channel %i\n", dma0); | |
583 | return -EINVAL; | |
584 | } | |
585 | devpriv->dma0 = dma0; | |
586 | devpriv->dma_current = dma0; | |
587 | if (dma1) { | |
588 | if (request_dma(dma1, driver_das1800.driver_name)) { | |
589 | printk(" failed to allocate dma channel %i\n", | |
0a85b6f0 | 590 | dma1); |
a69cc3a9 FMH |
591 | return -EINVAL; |
592 | } | |
593 | devpriv->dma1 = dma1; | |
594 | } | |
595 | devpriv->ai_buf0 = kmalloc(DMA_BUF_SIZE, GFP_KERNEL | GFP_DMA); | |
596 | if (devpriv->ai_buf0 == NULL) | |
597 | return -ENOMEM; | |
598 | devpriv->dma_current_buf = devpriv->ai_buf0; | |
599 | if (dma1) { | |
600 | devpriv->ai_buf1 = | |
0a85b6f0 | 601 | kmalloc(DMA_BUF_SIZE, GFP_KERNEL | GFP_DMA); |
a69cc3a9 FMH |
602 | if (devpriv->ai_buf1 == NULL) |
603 | return -ENOMEM; | |
604 | } | |
605 | flags = claim_dma_lock(); | |
606 | disable_dma(devpriv->dma0); | |
607 | set_dma_mode(devpriv->dma0, DMA_MODE_READ); | |
608 | if (dma1) { | |
609 | disable_dma(devpriv->dma1); | |
610 | set_dma_mode(devpriv->dma1, DMA_MODE_READ); | |
611 | } | |
612 | release_dma_lock(flags); | |
613 | } | |
614 | return 0; | |
615 | } | |
616 | ||
0a85b6f0 MT |
617 | static int das1800_attach(struct comedi_device *dev, |
618 | struct comedi_devconfig *it) | |
a69cc3a9 | 619 | { |
34c43922 | 620 | struct comedi_subdevice *s; |
a69cc3a9 FMH |
621 | unsigned long iobase = it->options[0]; |
622 | unsigned int irq = it->options[1]; | |
623 | unsigned int dma0 = it->options[2]; | |
624 | unsigned int dma1 = it->options[3]; | |
625 | unsigned long iobase2; | |
626 | int board; | |
627 | int retval; | |
628 | ||
629 | /* allocate and initialize dev->private */ | |
0c5a144d | 630 | if (alloc_private(dev, sizeof(struct das1800_private)) < 0) |
a69cc3a9 FMH |
631 | return -ENOMEM; |
632 | ||
633 | printk("comedi%d: %s: io 0x%lx", dev->minor, driver_das1800.driver_name, | |
0a85b6f0 | 634 | iobase); |
a69cc3a9 FMH |
635 | if (irq) { |
636 | printk(", irq %u", irq); | |
637 | if (dma0) { | |
638 | printk(", dma %u", dma0); | |
639 | if (dma1) | |
640 | printk(" and %u", dma1); | |
641 | } | |
642 | } | |
643 | printk("\n"); | |
644 | ||
645 | if (iobase == 0) { | |
646 | printk(" io base address required\n"); | |
647 | return -EINVAL; | |
648 | } | |
649 | ||
650 | /* check if io addresses are available */ | |
651 | if (!request_region(iobase, DAS1800_SIZE, driver_das1800.driver_name)) { | |
0a85b6f0 MT |
652 | printk |
653 | (" I/O port conflict: failed to allocate ports 0x%lx to 0x%lx\n", | |
654 | iobase, iobase + DAS1800_SIZE - 1); | |
a69cc3a9 FMH |
655 | return -EIO; |
656 | } | |
657 | dev->iobase = iobase; | |
658 | ||
659 | board = das1800_probe(dev); | |
660 | if (board < 0) { | |
661 | printk(" unable to determine board type\n"); | |
662 | return -ENODEV; | |
663 | } | |
664 | ||
665 | dev->board_ptr = das1800_boards + board; | |
666 | dev->board_name = thisboard->name; | |
667 | ||
a351ecf3 | 668 | /* if it is an 'ao' board with fancy analog out then we need extra io ports */ |
a69cc3a9 FMH |
669 | if (thisboard->ao_ability == 2) { |
670 | iobase2 = iobase + IOBASE2; | |
671 | if (!request_region(iobase2, DAS1800_SIZE, | |
0a85b6f0 MT |
672 | driver_das1800.driver_name)) { |
673 | printk | |
674 | (" I/O port conflict: failed to allocate ports 0x%lx to 0x%lx\n", | |
675 | iobase2, iobase2 + DAS1800_SIZE - 1); | |
a69cc3a9 FMH |
676 | return -EIO; |
677 | } | |
678 | devpriv->iobase2 = iobase2; | |
679 | } | |
680 | ||
681 | /* grab our IRQ */ | |
682 | if (irq) { | |
5f74ea14 | 683 | if (request_irq(irq, das1800_interrupt, 0, |
a69cc3a9 FMH |
684 | driver_das1800.driver_name, dev)) { |
685 | printk(" unable to allocate irq %u\n", irq); | |
686 | return -EINVAL; | |
687 | } | |
688 | } | |
689 | dev->irq = irq; | |
690 | ||
a351ecf3 | 691 | /* set bits that tell card which irq to use */ |
a69cc3a9 FMH |
692 | switch (irq) { |
693 | case 0: | |
694 | break; | |
695 | case 3: | |
696 | devpriv->irq_dma_bits |= 0x8; | |
697 | break; | |
698 | case 5: | |
699 | devpriv->irq_dma_bits |= 0x10; | |
700 | break; | |
701 | case 7: | |
702 | devpriv->irq_dma_bits |= 0x18; | |
703 | break; | |
704 | case 10: | |
705 | devpriv->irq_dma_bits |= 0x28; | |
706 | break; | |
707 | case 11: | |
708 | devpriv->irq_dma_bits |= 0x30; | |
709 | break; | |
710 | case 15: | |
711 | devpriv->irq_dma_bits |= 0x38; | |
712 | break; | |
713 | default: | |
714 | printk(" irq out of range\n"); | |
715 | return -EINVAL; | |
716 | break; | |
717 | } | |
718 | ||
719 | retval = das1800_init_dma(dev, dma0, dma1); | |
720 | if (retval < 0) | |
721 | return retval; | |
722 | ||
723 | if (devpriv->ai_buf0 == NULL) { | |
724 | devpriv->ai_buf0 = | |
0a85b6f0 | 725 | kmalloc(FIFO_SIZE * sizeof(uint16_t), GFP_KERNEL); |
a69cc3a9 FMH |
726 | if (devpriv->ai_buf0 == NULL) |
727 | return -ENOMEM; | |
728 | } | |
729 | ||
730 | if (alloc_subdevices(dev, 4) < 0) | |
731 | return -ENOMEM; | |
732 | ||
733 | /* analog input subdevice */ | |
734 | s = dev->subdevices + 0; | |
735 | dev->read_subdev = s; | |
736 | s->type = COMEDI_SUBD_AI; | |
737 | s->subdev_flags = SDF_READABLE | SDF_DIFF | SDF_GROUND | SDF_CMD_READ; | |
738 | if (thisboard->common) | |
739 | s->subdev_flags |= SDF_COMMON; | |
740 | s->n_chan = thisboard->qram_len; | |
741 | s->len_chanlist = thisboard->qram_len; | |
742 | s->maxdata = (1 << thisboard->resolution) - 1; | |
743 | s->range_table = thisboard->range_ai; | |
744 | s->do_cmd = das1800_ai_do_cmd; | |
745 | s->do_cmdtest = das1800_ai_do_cmdtest; | |
746 | s->insn_read = das1800_ai_rinsn; | |
747 | s->poll = das1800_ai_poll; | |
748 | s->cancel = das1800_cancel; | |
749 | ||
750 | /* analog out */ | |
751 | s = dev->subdevices + 1; | |
752 | if (thisboard->ao_ability == 1) { | |
753 | s->type = COMEDI_SUBD_AO; | |
754 | s->subdev_flags = SDF_WRITABLE; | |
755 | s->n_chan = thisboard->ao_n_chan; | |
756 | s->maxdata = (1 << thisboard->resolution) - 1; | |
757 | s->range_table = &range_ao_1; | |
758 | s->insn_write = das1800_ao_winsn; | |
759 | } else { | |
760 | s->type = COMEDI_SUBD_UNUSED; | |
761 | } | |
762 | ||
763 | /* di */ | |
764 | s = dev->subdevices + 2; | |
765 | s->type = COMEDI_SUBD_DI; | |
766 | s->subdev_flags = SDF_READABLE; | |
767 | s->n_chan = 4; | |
768 | s->maxdata = 1; | |
769 | s->range_table = &range_digital; | |
770 | s->insn_bits = das1800_di_rbits; | |
771 | ||
772 | /* do */ | |
773 | s = dev->subdevices + 3; | |
774 | s->type = COMEDI_SUBD_DO; | |
775 | s->subdev_flags = SDF_WRITABLE | SDF_READABLE; | |
776 | s->n_chan = thisboard->do_n_chan; | |
777 | s->maxdata = 1; | |
778 | s->range_table = &range_digital; | |
779 | s->insn_bits = das1800_do_wbits; | |
780 | ||
781 | das1800_cancel(dev, dev->read_subdev); | |
782 | ||
a351ecf3 | 783 | /* initialize digital out channels */ |
a69cc3a9 FMH |
784 | outb(devpriv->do_bits, dev->iobase + DAS1800_DIGITAL); |
785 | ||
a351ecf3 | 786 | /* initialize analog out channels */ |
a69cc3a9 | 787 | if (thisboard->ao_ability == 1) { |
a351ecf3 | 788 | /* select 'update' dac channel for baseAddress + 0x0 */ |
a69cc3a9 | 789 | outb(DAC(thisboard->ao_n_chan - 1), |
0a85b6f0 | 790 | dev->iobase + DAS1800_SELECT); |
a69cc3a9 FMH |
791 | outw(devpriv->ao_update_bits, dev->iobase + DAS1800_DAC); |
792 | } | |
793 | ||
794 | return 0; | |
795 | }; | |
796 | ||
da91b269 | 797 | static int das1800_detach(struct comedi_device *dev) |
a69cc3a9 FMH |
798 | { |
799 | /* only free stuff if it has been allocated by _attach */ | |
800 | if (dev->iobase) | |
801 | release_region(dev->iobase, DAS1800_SIZE); | |
802 | if (dev->irq) | |
5f74ea14 | 803 | free_irq(dev->irq, dev); |
a69cc3a9 FMH |
804 | if (dev->private) { |
805 | if (devpriv->iobase2) | |
806 | release_region(devpriv->iobase2, DAS1800_SIZE); | |
807 | if (devpriv->dma0) | |
808 | free_dma(devpriv->dma0); | |
809 | if (devpriv->dma1) | |
810 | free_dma(devpriv->dma1); | |
1bf2ee4e DB |
811 | kfree(devpriv->ai_buf0); |
812 | kfree(devpriv->ai_buf1); | |
a69cc3a9 FMH |
813 | } |
814 | ||
815 | printk("comedi%d: %s: remove\n", dev->minor, | |
0a85b6f0 | 816 | driver_das1800.driver_name); |
a69cc3a9 FMH |
817 | |
818 | return 0; | |
819 | }; | |
820 | ||
821 | /* probes and checks das-1800 series board type | |
822 | */ | |
da91b269 | 823 | static int das1800_probe(struct comedi_device *dev) |
a69cc3a9 FMH |
824 | { |
825 | int id; | |
826 | int board; | |
827 | ||
828 | id = (inb(dev->iobase + DAS1800_DIGITAL) >> 4) & 0xf; /* get id bits */ | |
0a85b6f0 | 829 | board = ((struct das1800_board *)dev->board_ptr) - das1800_boards; |
a69cc3a9 FMH |
830 | |
831 | switch (id) { | |
832 | case 0x3: | |
833 | if (board == das1801st_da || board == das1802st_da || | |
0a85b6f0 | 834 | board == das1701st_da || board == das1702st_da) { |
a69cc3a9 | 835 | printk(" Board model: %s\n", |
0a85b6f0 | 836 | das1800_boards[board].name); |
a69cc3a9 FMH |
837 | return board; |
838 | } | |
0a85b6f0 MT |
839 | printk |
840 | (" Board model (probed, not recommended): das-1800st-da series\n"); | |
a69cc3a9 FMH |
841 | return das1801st; |
842 | break; | |
843 | case 0x4: | |
844 | if (board == das1802hr_da || board == das1702hr_da) { | |
845 | printk(" Board model: %s\n", | |
0a85b6f0 | 846 | das1800_boards[board].name); |
a69cc3a9 FMH |
847 | return board; |
848 | } | |
0a85b6f0 MT |
849 | printk |
850 | (" Board model (probed, not recommended): das-1802hr-da\n"); | |
a69cc3a9 FMH |
851 | return das1802hr; |
852 | break; | |
853 | case 0x5: | |
854 | if (board == das1801ao || board == das1802ao || | |
0a85b6f0 | 855 | board == das1701ao || board == das1702ao) { |
a69cc3a9 | 856 | printk(" Board model: %s\n", |
0a85b6f0 | 857 | das1800_boards[board].name); |
a69cc3a9 FMH |
858 | return board; |
859 | } | |
0a85b6f0 MT |
860 | printk |
861 | (" Board model (probed, not recommended): das-1800ao series\n"); | |
a69cc3a9 FMH |
862 | return das1801ao; |
863 | break; | |
864 | case 0x6: | |
865 | if (board == das1802hr || board == das1702hr) { | |
866 | printk(" Board model: %s\n", | |
0a85b6f0 | 867 | das1800_boards[board].name); |
a69cc3a9 FMH |
868 | return board; |
869 | } | |
870 | printk(" Board model (probed, not recommended): das-1802hr\n"); | |
871 | return das1802hr; | |
872 | break; | |
873 | case 0x7: | |
874 | if (board == das1801st || board == das1802st || | |
0a85b6f0 | 875 | board == das1701st || board == das1702st) { |
a69cc3a9 | 876 | printk(" Board model: %s\n", |
0a85b6f0 | 877 | das1800_boards[board].name); |
a69cc3a9 FMH |
878 | return board; |
879 | } | |
0a85b6f0 MT |
880 | printk |
881 | (" Board model (probed, not recommended): das-1800st series\n"); | |
a69cc3a9 FMH |
882 | return das1801st; |
883 | break; | |
884 | case 0x8: | |
885 | if (board == das1801hc || board == das1802hc) { | |
886 | printk(" Board model: %s\n", | |
0a85b6f0 | 887 | das1800_boards[board].name); |
a69cc3a9 FMH |
888 | return board; |
889 | } | |
0a85b6f0 MT |
890 | printk |
891 | (" Board model (probed, not recommended): das-1800hc series\n"); | |
a69cc3a9 FMH |
892 | return das1801hc; |
893 | break; | |
894 | default: | |
0a85b6f0 MT |
895 | printk |
896 | (" Board model: probe returned 0x%x (unknown, please report)\n", | |
897 | id); | |
a69cc3a9 FMH |
898 | return board; |
899 | break; | |
900 | } | |
901 | return -1; | |
902 | } | |
903 | ||
0a85b6f0 MT |
904 | static int das1800_ai_poll(struct comedi_device *dev, |
905 | struct comedi_subdevice *s) | |
a69cc3a9 FMH |
906 | { |
907 | unsigned long flags; | |
908 | ||
a351ecf3 | 909 | /* prevent race with interrupt handler */ |
5f74ea14 | 910 | spin_lock_irqsave(&dev->spinlock, flags); |
a69cc3a9 | 911 | das1800_ai_handler(dev); |
5f74ea14 | 912 | spin_unlock_irqrestore(&dev->spinlock, flags); |
a69cc3a9 FMH |
913 | |
914 | return s->async->buf_write_count - s->async->buf_read_count; | |
915 | } | |
916 | ||
70265d24 | 917 | static irqreturn_t das1800_interrupt(int irq, void *d) |
a69cc3a9 | 918 | { |
71b5f4f1 | 919 | struct comedi_device *dev = d; |
a69cc3a9 FMH |
920 | unsigned int status; |
921 | ||
922 | if (dev->attached == 0) { | |
923 | comedi_error(dev, "premature interrupt"); | |
924 | return IRQ_HANDLED; | |
925 | } | |
926 | ||
927 | /* Prevent race with das1800_ai_poll() on multi processor systems. | |
928 | * Also protects indirect addressing in das1800_ai_handler */ | |
929 | spin_lock(&dev->spinlock); | |
930 | status = inb(dev->iobase + DAS1800_STATUS); | |
931 | ||
932 | /* if interrupt was not caused by das-1800 */ | |
933 | if (!(status & INT)) { | |
934 | spin_unlock(&dev->spinlock); | |
935 | return IRQ_NONE; | |
936 | } | |
937 | /* clear the interrupt status bit INT */ | |
938 | outb(CLEAR_INTR_MASK & ~INT, dev->iobase + DAS1800_STATUS); | |
a351ecf3 | 939 | /* handle interrupt */ |
a69cc3a9 FMH |
940 | das1800_ai_handler(dev); |
941 | ||
942 | spin_unlock(&dev->spinlock); | |
943 | return IRQ_HANDLED; | |
944 | } | |
945 | ||
a351ecf3 | 946 | /* the guts of the interrupt handler, that is shared with das1800_ai_poll */ |
da91b269 | 947 | static void das1800_ai_handler(struct comedi_device *dev) |
a69cc3a9 | 948 | { |
34c43922 | 949 | struct comedi_subdevice *s = dev->subdevices + 0; /* analog input subdevice */ |
d163679c | 950 | struct comedi_async *async = s->async; |
ea6d0d4c | 951 | struct comedi_cmd *cmd = &async->cmd; |
a69cc3a9 FMH |
952 | unsigned int status = inb(dev->iobase + DAS1800_STATUS); |
953 | ||
954 | async->events = 0; | |
a351ecf3 | 955 | /* select adc for base address + 0 */ |
a69cc3a9 | 956 | outb(ADC, dev->iobase + DAS1800_SELECT); |
a351ecf3 | 957 | /* dma buffer full */ |
a69cc3a9 | 958 | if (devpriv->irq_dma_bits & DMA_ENABLED) { |
a351ecf3 | 959 | /* look for data from dma transfer even if dma terminal count hasn't happened yet */ |
a69cc3a9 | 960 | das1800_handle_dma(dev, s, status); |
a351ecf3 | 961 | } else if (status & FHF) { /* if fifo half full */ |
a69cc3a9 | 962 | das1800_handle_fifo_half_full(dev, s); |
a351ecf3 | 963 | } else if (status & FNE) { /* if fifo not empty */ |
a69cc3a9 FMH |
964 | das1800_handle_fifo_not_empty(dev, s); |
965 | } | |
966 | ||
967 | async->events |= COMEDI_CB_BLOCK; | |
968 | /* if the card's fifo has overflowed */ | |
969 | if (status & OVF) { | |
a351ecf3 | 970 | /* clear OVF interrupt bit */ |
a69cc3a9 FMH |
971 | outb(CLEAR_INTR_MASK & ~OVF, dev->iobase + DAS1800_STATUS); |
972 | comedi_error(dev, "DAS1800 FIFO overflow"); | |
973 | das1800_cancel(dev, s); | |
974 | async->events |= COMEDI_CB_ERROR | COMEDI_CB_EOA; | |
975 | comedi_event(dev, s); | |
976 | return; | |
977 | } | |
a351ecf3 | 978 | /* stop taking data if appropriate */ |
a69cc3a9 FMH |
979 | /* stop_src TRIG_EXT */ |
980 | if (status & CT0TC) { | |
a351ecf3 | 981 | /* clear CT0TC interrupt bit */ |
a69cc3a9 | 982 | outb(CLEAR_INTR_MASK & ~CT0TC, dev->iobase + DAS1800_STATUS); |
a351ecf3 | 983 | /* make sure we get all remaining data from board before quitting */ |
a69cc3a9 FMH |
984 | if (devpriv->irq_dma_bits & DMA_ENABLED) |
985 | das1800_flush_dma(dev, s); | |
986 | else | |
987 | das1800_handle_fifo_not_empty(dev, s); | |
988 | das1800_cancel(dev, s); /* disable hardware conversions */ | |
989 | async->events |= COMEDI_CB_EOA; | |
a351ecf3 | 990 | } else if (cmd->stop_src == TRIG_COUNT && devpriv->count == 0) { /* stop_src TRIG_COUNT */ |
a69cc3a9 FMH |
991 | das1800_cancel(dev, s); /* disable hardware conversions */ |
992 | async->events |= COMEDI_CB_EOA; | |
993 | } | |
994 | ||
995 | comedi_event(dev, s); | |
996 | ||
997 | return; | |
998 | } | |
999 | ||
0a85b6f0 MT |
1000 | static void das1800_handle_dma(struct comedi_device *dev, |
1001 | struct comedi_subdevice *s, unsigned int status) | |
a69cc3a9 FMH |
1002 | { |
1003 | unsigned long flags; | |
1004 | const int dual_dma = devpriv->irq_dma_bits & DMA_DUAL; | |
1005 | ||
1006 | flags = claim_dma_lock(); | |
1007 | das1800_flush_dma_channel(dev, s, devpriv->dma_current, | |
0a85b6f0 | 1008 | devpriv->dma_current_buf); |
a351ecf3 | 1009 | /* re-enable dma channel */ |
a69cc3a9 | 1010 | set_dma_addr(devpriv->dma_current, |
0a85b6f0 | 1011 | virt_to_bus(devpriv->dma_current_buf)); |
a69cc3a9 FMH |
1012 | set_dma_count(devpriv->dma_current, devpriv->dma_transfer_size); |
1013 | enable_dma(devpriv->dma_current); | |
1014 | release_dma_lock(flags); | |
1015 | ||
1016 | if (status & DMATC) { | |
a351ecf3 | 1017 | /* clear DMATC interrupt bit */ |
a69cc3a9 | 1018 | outb(CLEAR_INTR_MASK & ~DMATC, dev->iobase + DAS1800_STATUS); |
a351ecf3 | 1019 | /* switch dma channels for next time, if appropriate */ |
a69cc3a9 | 1020 | if (dual_dma) { |
a351ecf3 | 1021 | /* read data from the other channel next time */ |
a69cc3a9 FMH |
1022 | if (devpriv->dma_current == devpriv->dma0) { |
1023 | devpriv->dma_current = devpriv->dma1; | |
1024 | devpriv->dma_current_buf = devpriv->ai_buf1; | |
1025 | } else { | |
1026 | devpriv->dma_current = devpriv->dma0; | |
1027 | devpriv->dma_current_buf = devpriv->ai_buf0; | |
1028 | } | |
1029 | } | |
1030 | } | |
1031 | ||
1032 | return; | |
1033 | } | |
1034 | ||
da91b269 | 1035 | static inline uint16_t munge_bipolar_sample(const struct comedi_device *dev, |
0a85b6f0 | 1036 | uint16_t sample) |
a69cc3a9 FMH |
1037 | { |
1038 | sample += 1 << (thisboard->resolution - 1); | |
1039 | return sample; | |
1040 | } | |
1041 | ||
0a85b6f0 MT |
1042 | static void munge_data(struct comedi_device *dev, uint16_t * array, |
1043 | unsigned int num_elements) | |
a69cc3a9 FMH |
1044 | { |
1045 | unsigned int i; | |
1046 | int unipolar; | |
1047 | ||
1048 | /* see if card is using a unipolar or bipolar range so we can munge data correctly */ | |
1049 | unipolar = inb(dev->iobase + DAS1800_CONTROL_C) & UB; | |
1050 | ||
1051 | /* convert to unsigned type if we are in a bipolar mode */ | |
1052 | if (!unipolar) { | |
1053 | for (i = 0; i < num_elements; i++) { | |
1054 | array[i] = munge_bipolar_sample(dev, array[i]); | |
1055 | } | |
1056 | } | |
1057 | } | |
1058 | ||
1059 | /* Utility function used by das1800_flush_dma() and das1800_handle_dma(). | |
1060 | * Assumes dma lock is held */ | |
0a85b6f0 MT |
1061 | static void das1800_flush_dma_channel(struct comedi_device *dev, |
1062 | struct comedi_subdevice *s, | |
1063 | unsigned int channel, uint16_t * buffer) | |
a69cc3a9 FMH |
1064 | { |
1065 | unsigned int num_bytes, num_samples; | |
ea6d0d4c | 1066 | struct comedi_cmd *cmd = &s->async->cmd; |
a69cc3a9 FMH |
1067 | |
1068 | disable_dma(channel); | |
1069 | ||
1070 | /* clear flip-flop to make sure 2-byte registers | |
1071 | * get set correctly */ | |
1072 | clear_dma_ff(channel); | |
1073 | ||
a351ecf3 | 1074 | /* figure out how many points to read */ |
a69cc3a9 | 1075 | num_bytes = devpriv->dma_transfer_size - get_dma_residue(channel); |
790c5541 | 1076 | num_samples = num_bytes / sizeof(short); |
a69cc3a9 FMH |
1077 | |
1078 | /* if we only need some of the points */ | |
1079 | if (cmd->stop_src == TRIG_COUNT && devpriv->count < num_samples) | |
1080 | num_samples = devpriv->count; | |
1081 | ||
1082 | munge_data(dev, buffer, num_samples); | |
1083 | cfc_write_array_to_buffer(s, buffer, num_bytes); | |
1084 | if (s->async->cmd.stop_src == TRIG_COUNT) | |
1085 | devpriv->count -= num_samples; | |
1086 | ||
1087 | return; | |
1088 | } | |
1089 | ||
25985edc | 1090 | /* flushes remaining data from board when external trigger has stopped acquisition |
a69cc3a9 | 1091 | * and we are using dma transfers */ |
0a85b6f0 MT |
1092 | static void das1800_flush_dma(struct comedi_device *dev, |
1093 | struct comedi_subdevice *s) | |
a69cc3a9 FMH |
1094 | { |
1095 | unsigned long flags; | |
1096 | const int dual_dma = devpriv->irq_dma_bits & DMA_DUAL; | |
1097 | ||
1098 | flags = claim_dma_lock(); | |
1099 | das1800_flush_dma_channel(dev, s, devpriv->dma_current, | |
0a85b6f0 | 1100 | devpriv->dma_current_buf); |
a69cc3a9 FMH |
1101 | |
1102 | if (dual_dma) { | |
a351ecf3 | 1103 | /* switch to other channel and flush it */ |
a69cc3a9 FMH |
1104 | if (devpriv->dma_current == devpriv->dma0) { |
1105 | devpriv->dma_current = devpriv->dma1; | |
1106 | devpriv->dma_current_buf = devpriv->ai_buf1; | |
1107 | } else { | |
1108 | devpriv->dma_current = devpriv->dma0; | |
1109 | devpriv->dma_current_buf = devpriv->ai_buf0; | |
1110 | } | |
1111 | das1800_flush_dma_channel(dev, s, devpriv->dma_current, | |
0a85b6f0 | 1112 | devpriv->dma_current_buf); |
a69cc3a9 FMH |
1113 | } |
1114 | ||
1115 | release_dma_lock(flags); | |
1116 | ||
a351ecf3 | 1117 | /* get any remaining samples in fifo */ |
a69cc3a9 FMH |
1118 | das1800_handle_fifo_not_empty(dev, s); |
1119 | ||
1120 | return; | |
1121 | } | |
1122 | ||
da91b269 | 1123 | static void das1800_handle_fifo_half_full(struct comedi_device *dev, |
0a85b6f0 | 1124 | struct comedi_subdevice *s) |
a69cc3a9 FMH |
1125 | { |
1126 | int numPoints = 0; /* number of points to read */ | |
ea6d0d4c | 1127 | struct comedi_cmd *cmd = &s->async->cmd; |
a69cc3a9 FMH |
1128 | |
1129 | numPoints = FIFO_SIZE / 2; | |
1130 | /* if we only need some of the points */ | |
1131 | if (cmd->stop_src == TRIG_COUNT && devpriv->count < numPoints) | |
1132 | numPoints = devpriv->count; | |
1133 | insw(dev->iobase + DAS1800_FIFO, devpriv->ai_buf0, numPoints); | |
1134 | munge_data(dev, devpriv->ai_buf0, numPoints); | |
1135 | cfc_write_array_to_buffer(s, devpriv->ai_buf0, | |
0a85b6f0 | 1136 | numPoints * sizeof(devpriv->ai_buf0[0])); |
a69cc3a9 FMH |
1137 | if (cmd->stop_src == TRIG_COUNT) |
1138 | devpriv->count -= numPoints; | |
1139 | return; | |
1140 | } | |
1141 | ||
da91b269 | 1142 | static void das1800_handle_fifo_not_empty(struct comedi_device *dev, |
0a85b6f0 | 1143 | struct comedi_subdevice *s) |
a69cc3a9 | 1144 | { |
790c5541 | 1145 | short dpnt; |
a69cc3a9 | 1146 | int unipolar; |
ea6d0d4c | 1147 | struct comedi_cmd *cmd = &s->async->cmd; |
a69cc3a9 FMH |
1148 | |
1149 | unipolar = inb(dev->iobase + DAS1800_CONTROL_C) & UB; | |
1150 | ||
1151 | while (inb(dev->iobase + DAS1800_STATUS) & FNE) { | |
1152 | if (cmd->stop_src == TRIG_COUNT && devpriv->count == 0) | |
1153 | break; | |
1154 | dpnt = inw(dev->iobase + DAS1800_FIFO); | |
1155 | /* convert to unsigned type if we are in a bipolar mode */ | |
1156 | if (!unipolar) ; | |
1157 | dpnt = munge_bipolar_sample(dev, dpnt); | |
1158 | cfc_write_to_buffer(s, dpnt); | |
1159 | if (cmd->stop_src == TRIG_COUNT) | |
1160 | devpriv->count--; | |
1161 | } | |
1162 | ||
1163 | return; | |
1164 | } | |
1165 | ||
da91b269 | 1166 | static int das1800_cancel(struct comedi_device *dev, struct comedi_subdevice *s) |
a69cc3a9 FMH |
1167 | { |
1168 | outb(0x0, dev->iobase + DAS1800_STATUS); /* disable conversions */ | |
1169 | outb(0x0, dev->iobase + DAS1800_CONTROL_B); /* disable interrupts and dma */ | |
1170 | outb(0x0, dev->iobase + DAS1800_CONTROL_A); /* disable and clear fifo and stop triggering */ | |
1171 | if (devpriv->dma0) | |
1172 | disable_dma(devpriv->dma0); | |
1173 | if (devpriv->dma1) | |
1174 | disable_dma(devpriv->dma1); | |
1175 | return 0; | |
1176 | } | |
1177 | ||
1178 | /* test analog input cmd */ | |
0a85b6f0 MT |
1179 | static int das1800_ai_do_cmdtest(struct comedi_device *dev, |
1180 | struct comedi_subdevice *s, | |
1181 | struct comedi_cmd *cmd) | |
a69cc3a9 FMH |
1182 | { |
1183 | int err = 0; | |
1184 | int tmp; | |
1185 | unsigned int tmp_arg; | |
1186 | int i; | |
1187 | int unipolar; | |
1188 | ||
1189 | /* step 1: make sure trigger sources are trivially valid */ | |
1190 | ||
1191 | tmp = cmd->start_src; | |
1192 | cmd->start_src &= TRIG_NOW | TRIG_EXT; | |
1193 | if (!cmd->start_src || tmp != cmd->start_src) | |
1194 | err++; | |
1195 | ||
1196 | tmp = cmd->scan_begin_src; | |
1197 | cmd->scan_begin_src &= TRIG_FOLLOW | TRIG_TIMER | TRIG_EXT; | |
1198 | if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src) | |
1199 | err++; | |
1200 | ||
1201 | tmp = cmd->convert_src; | |
1202 | cmd->convert_src &= TRIG_TIMER | TRIG_EXT; | |
1203 | if (!cmd->convert_src || tmp != cmd->convert_src) | |
1204 | err++; | |
1205 | ||
1206 | tmp = cmd->scan_end_src; | |
1207 | cmd->scan_end_src &= TRIG_COUNT; | |
1208 | if (!cmd->scan_end_src || tmp != cmd->scan_end_src) | |
1209 | err++; | |
1210 | ||
1211 | tmp = cmd->stop_src; | |
1212 | cmd->stop_src &= TRIG_COUNT | TRIG_EXT | TRIG_NONE; | |
1213 | if (!cmd->stop_src || tmp != cmd->stop_src) | |
1214 | err++; | |
1215 | ||
1216 | if (err) | |
1217 | return 1; | |
1218 | ||
1219 | /* step 2: make sure trigger sources are unique and mutually compatible */ | |
1220 | ||
a351ecf3 | 1221 | /* uniqueness check */ |
a69cc3a9 FMH |
1222 | if (cmd->start_src != TRIG_NOW && cmd->start_src != TRIG_EXT) |
1223 | err++; | |
1224 | if (cmd->scan_begin_src != TRIG_FOLLOW && | |
0a85b6f0 MT |
1225 | cmd->scan_begin_src != TRIG_TIMER && |
1226 | cmd->scan_begin_src != TRIG_EXT) | |
a69cc3a9 FMH |
1227 | err++; |
1228 | if (cmd->convert_src != TRIG_TIMER && cmd->convert_src != TRIG_EXT) | |
1229 | err++; | |
1230 | if (cmd->stop_src != TRIG_COUNT && | |
0a85b6f0 | 1231 | cmd->stop_src != TRIG_NONE && cmd->stop_src != TRIG_EXT) |
a69cc3a9 | 1232 | err++; |
a351ecf3 | 1233 | /* compatibility check */ |
a69cc3a9 | 1234 | if (cmd->scan_begin_src != TRIG_FOLLOW && |
0a85b6f0 | 1235 | cmd->convert_src != TRIG_TIMER) |
a69cc3a9 FMH |
1236 | err++; |
1237 | ||
1238 | if (err) | |
1239 | return 2; | |
1240 | ||
1241 | /* step 3: make sure arguments are trivially compatible */ | |
1242 | ||
1243 | if (cmd->start_arg != 0) { | |
1244 | cmd->start_arg = 0; | |
1245 | err++; | |
1246 | } | |
1247 | if (cmd->convert_src == TRIG_TIMER) { | |
1248 | if (cmd->convert_arg < thisboard->ai_speed) { | |
1249 | cmd->convert_arg = thisboard->ai_speed; | |
1250 | err++; | |
1251 | } | |
1252 | } | |
1253 | if (!cmd->chanlist_len) { | |
1254 | cmd->chanlist_len = 1; | |
1255 | err++; | |
1256 | } | |
1257 | if (cmd->scan_end_arg != cmd->chanlist_len) { | |
1258 | cmd->scan_end_arg = cmd->chanlist_len; | |
1259 | err++; | |
1260 | } | |
1261 | ||
1262 | switch (cmd->stop_src) { | |
1263 | case TRIG_COUNT: | |
1264 | if (!cmd->stop_arg) { | |
1265 | cmd->stop_arg = 1; | |
1266 | err++; | |
1267 | } | |
1268 | break; | |
1269 | case TRIG_NONE: | |
1270 | if (cmd->stop_arg != 0) { | |
1271 | cmd->stop_arg = 0; | |
1272 | err++; | |
1273 | } | |
1274 | break; | |
1275 | default: | |
1276 | break; | |
1277 | } | |
1278 | ||
1279 | if (err) | |
1280 | return 3; | |
1281 | ||
1282 | /* step 4: fix up any arguments */ | |
1283 | ||
1284 | if (cmd->convert_src == TRIG_TIMER) { | |
a351ecf3 | 1285 | /* if we are not in burst mode */ |
a69cc3a9 FMH |
1286 | if (cmd->scan_begin_src == TRIG_FOLLOW) { |
1287 | tmp_arg = cmd->convert_arg; | |
1288 | /* calculate counter values that give desired timing */ | |
1289 | i8253_cascade_ns_to_timer_2div(TIMER_BASE, | |
0a85b6f0 MT |
1290 | &(devpriv->divisor1), |
1291 | &(devpriv->divisor2), | |
1292 | &(cmd->convert_arg), | |
1293 | cmd-> | |
1294 | flags & TRIG_ROUND_MASK); | |
a69cc3a9 FMH |
1295 | if (tmp_arg != cmd->convert_arg) |
1296 | err++; | |
1297 | } | |
a351ecf3 | 1298 | /* if we are in burst mode */ |
a69cc3a9 | 1299 | else { |
a351ecf3 | 1300 | /* check that convert_arg is compatible */ |
a69cc3a9 FMH |
1301 | tmp_arg = cmd->convert_arg; |
1302 | cmd->convert_arg = | |
0a85b6f0 MT |
1303 | burst_convert_arg(cmd->convert_arg, |
1304 | cmd->flags & TRIG_ROUND_MASK); | |
a69cc3a9 FMH |
1305 | if (tmp_arg != cmd->convert_arg) |
1306 | err++; | |
1307 | ||
1308 | if (cmd->scan_begin_src == TRIG_TIMER) { | |
a351ecf3 | 1309 | /* if scans are timed faster than conversion rate allows */ |
a69cc3a9 | 1310 | if (cmd->convert_arg * cmd->chanlist_len > |
0a85b6f0 | 1311 | cmd->scan_begin_arg) { |
a69cc3a9 | 1312 | cmd->scan_begin_arg = |
0a85b6f0 MT |
1313 | cmd->convert_arg * |
1314 | cmd->chanlist_len; | |
a69cc3a9 FMH |
1315 | err++; |
1316 | } | |
1317 | tmp_arg = cmd->scan_begin_arg; | |
1318 | /* calculate counter values that give desired timing */ | |
1319 | i8253_cascade_ns_to_timer_2div(TIMER_BASE, | |
0a85b6f0 MT |
1320 | &(devpriv-> |
1321 | divisor1), | |
1322 | &(devpriv-> | |
1323 | divisor2), | |
1324 | &(cmd-> | |
1325 | scan_begin_arg), | |
1326 | cmd-> | |
1327 | flags & | |
1328 | TRIG_ROUND_MASK); | |
a69cc3a9 FMH |
1329 | if (tmp_arg != cmd->scan_begin_arg) |
1330 | err++; | |
1331 | } | |
1332 | } | |
1333 | } | |
1334 | ||
1335 | if (err) | |
1336 | return 4; | |
1337 | ||
a351ecf3 | 1338 | /* make sure user is not trying to mix unipolar and bipolar ranges */ |
a69cc3a9 FMH |
1339 | if (cmd->chanlist) { |
1340 | unipolar = CR_RANGE(cmd->chanlist[0]) & UNIPOLAR; | |
1341 | for (i = 1; i < cmd->chanlist_len; i++) { | |
1342 | if (unipolar != (CR_RANGE(cmd->chanlist[i]) & UNIPOLAR)) { | |
1343 | comedi_error(dev, | |
0a85b6f0 | 1344 | "unipolar and bipolar ranges cannot be mixed in the chanlist"); |
a69cc3a9 FMH |
1345 | err++; |
1346 | break; | |
1347 | } | |
1348 | } | |
1349 | } | |
1350 | ||
1351 | if (err) | |
1352 | return 5; | |
1353 | ||
1354 | return 0; | |
1355 | } | |
1356 | ||
1357 | /* analog input cmd interface */ | |
1358 | ||
a351ecf3 | 1359 | /* first, some utility functions used in the main ai_do_cmd() */ |
a69cc3a9 | 1360 | |
a351ecf3 | 1361 | /* returns appropriate bits for control register a, depending on command */ |
ea6d0d4c | 1362 | static int control_a_bits(struct comedi_cmd cmd) |
a69cc3a9 FMH |
1363 | { |
1364 | int control_a; | |
1365 | ||
a351ecf3 | 1366 | control_a = FFEN; /* enable fifo */ |
a69cc3a9 FMH |
1367 | if (cmd.stop_src == TRIG_EXT) { |
1368 | control_a |= ATEN; | |
1369 | } | |
1370 | switch (cmd.start_src) { | |
1371 | case TRIG_EXT: | |
1372 | control_a |= TGEN | CGSL; | |
1373 | break; | |
1374 | case TRIG_NOW: | |
1375 | control_a |= CGEN; | |
1376 | break; | |
1377 | default: | |
1378 | break; | |
1379 | } | |
1380 | ||
1381 | return control_a; | |
1382 | } | |
1383 | ||
a351ecf3 | 1384 | /* returns appropriate bits for control register c, depending on command */ |
ea6d0d4c | 1385 | static int control_c_bits(struct comedi_cmd cmd) |
a69cc3a9 FMH |
1386 | { |
1387 | int control_c; | |
1388 | int aref; | |
1389 | ||
1390 | /* set clock source to internal or external, select analog reference, | |
1391 | * select unipolar / bipolar | |
1392 | */ | |
1393 | aref = CR_AREF(cmd.chanlist[0]); | |
a351ecf3 | 1394 | control_c = UQEN; /* enable upper qram addresses */ |
a69cc3a9 FMH |
1395 | if (aref != AREF_DIFF) |
1396 | control_c |= SD; | |
1397 | if (aref == AREF_COMMON) | |
1398 | control_c |= CMEN; | |
1399 | /* if a unipolar range was selected */ | |
1400 | if (CR_RANGE(cmd.chanlist[0]) & UNIPOLAR) | |
1401 | control_c |= UB; | |
1402 | switch (cmd.scan_begin_src) { | |
a351ecf3 | 1403 | case TRIG_FOLLOW: /* not in burst mode */ |
a69cc3a9 FMH |
1404 | switch (cmd.convert_src) { |
1405 | case TRIG_TIMER: | |
1406 | /* trig on cascaded counters */ | |
1407 | control_c |= IPCLK; | |
1408 | break; | |
1409 | case TRIG_EXT: | |
1410 | /* trig on falling edge of external trigger */ | |
1411 | control_c |= XPCLK; | |
1412 | break; | |
1413 | default: | |
1414 | break; | |
1415 | } | |
1416 | break; | |
1417 | case TRIG_TIMER: | |
a351ecf3 | 1418 | /* burst mode with internal pacer clock */ |
a69cc3a9 FMH |
1419 | control_c |= BMDE | IPCLK; |
1420 | break; | |
1421 | case TRIG_EXT: | |
a351ecf3 | 1422 | /* burst mode with external trigger */ |
a69cc3a9 FMH |
1423 | control_c |= BMDE | XPCLK; |
1424 | break; | |
1425 | default: | |
1426 | break; | |
1427 | } | |
1428 | ||
1429 | return control_c; | |
1430 | } | |
1431 | ||
a351ecf3 | 1432 | /* sets up counters */ |
da91b269 | 1433 | static int setup_counters(struct comedi_device *dev, struct comedi_cmd cmd) |
a69cc3a9 | 1434 | { |
a351ecf3 | 1435 | /* setup cascaded counters for conversion/scan frequency */ |
a69cc3a9 | 1436 | switch (cmd.scan_begin_src) { |
a351ecf3 | 1437 | case TRIG_FOLLOW: /* not in burst mode */ |
a69cc3a9 FMH |
1438 | if (cmd.convert_src == TRIG_TIMER) { |
1439 | /* set conversion frequency */ | |
1440 | i8253_cascade_ns_to_timer_2div(TIMER_BASE, | |
0a85b6f0 MT |
1441 | &(devpriv->divisor1), |
1442 | &(devpriv->divisor2), | |
1443 | &(cmd.convert_arg), | |
1444 | cmd. | |
1445 | flags & TRIG_ROUND_MASK); | |
a69cc3a9 FMH |
1446 | if (das1800_set_frequency(dev) < 0) { |
1447 | return -1; | |
1448 | } | |
1449 | } | |
1450 | break; | |
a351ecf3 | 1451 | case TRIG_TIMER: /* in burst mode */ |
a69cc3a9 FMH |
1452 | /* set scan frequency */ |
1453 | i8253_cascade_ns_to_timer_2div(TIMER_BASE, &(devpriv->divisor1), | |
0a85b6f0 MT |
1454 | &(devpriv->divisor2), |
1455 | &(cmd.scan_begin_arg), | |
1456 | cmd.flags & TRIG_ROUND_MASK); | |
a69cc3a9 FMH |
1457 | if (das1800_set_frequency(dev) < 0) { |
1458 | return -1; | |
1459 | } | |
1460 | break; | |
1461 | default: | |
1462 | break; | |
1463 | } | |
1464 | ||
a351ecf3 | 1465 | /* setup counter 0 for 'about triggering' */ |
a69cc3a9 | 1466 | if (cmd.stop_src == TRIG_EXT) { |
a351ecf3 | 1467 | /* load counter 0 in mode 0 */ |
a69cc3a9 FMH |
1468 | i8254_load(dev->iobase + DAS1800_COUNTER, 0, 0, 1, 0); |
1469 | } | |
1470 | ||
1471 | return 0; | |
1472 | } | |
1473 | ||
a351ecf3 | 1474 | /* sets up dma */ |
da91b269 | 1475 | static void setup_dma(struct comedi_device *dev, struct comedi_cmd cmd) |
a69cc3a9 FMH |
1476 | { |
1477 | unsigned long lock_flags; | |
1478 | const int dual_dma = devpriv->irq_dma_bits & DMA_DUAL; | |
1479 | ||
1480 | if ((devpriv->irq_dma_bits & DMA_ENABLED) == 0) | |
1481 | return; | |
1482 | ||
1483 | /* determine a reasonable dma transfer size */ | |
1484 | devpriv->dma_transfer_size = suggest_transfer_size(&cmd); | |
1485 | lock_flags = claim_dma_lock(); | |
1486 | disable_dma(devpriv->dma0); | |
1487 | /* clear flip-flop to make sure 2-byte registers for | |
1488 | * count and address get set correctly */ | |
1489 | clear_dma_ff(devpriv->dma0); | |
1490 | set_dma_addr(devpriv->dma0, virt_to_bus(devpriv->ai_buf0)); | |
a351ecf3 | 1491 | /* set appropriate size of transfer */ |
a69cc3a9 FMH |
1492 | set_dma_count(devpriv->dma0, devpriv->dma_transfer_size); |
1493 | devpriv->dma_current = devpriv->dma0; | |
1494 | devpriv->dma_current_buf = devpriv->ai_buf0; | |
1495 | enable_dma(devpriv->dma0); | |
a351ecf3 | 1496 | /* set up dual dma if appropriate */ |
a69cc3a9 FMH |
1497 | if (dual_dma) { |
1498 | disable_dma(devpriv->dma1); | |
1499 | /* clear flip-flop to make sure 2-byte registers for | |
1500 | * count and address get set correctly */ | |
1501 | clear_dma_ff(devpriv->dma1); | |
1502 | set_dma_addr(devpriv->dma1, virt_to_bus(devpriv->ai_buf1)); | |
a351ecf3 | 1503 | /* set appropriate size of transfer */ |
a69cc3a9 FMH |
1504 | set_dma_count(devpriv->dma1, devpriv->dma_transfer_size); |
1505 | enable_dma(devpriv->dma1); | |
1506 | } | |
1507 | release_dma_lock(lock_flags); | |
1508 | ||
1509 | return; | |
1510 | } | |
1511 | ||
a351ecf3 | 1512 | /* programs channel/gain list into card */ |
da91b269 | 1513 | static void program_chanlist(struct comedi_device *dev, struct comedi_cmd cmd) |
a69cc3a9 FMH |
1514 | { |
1515 | int i, n, chan_range; | |
1516 | unsigned long irq_flags; | |
a351ecf3 | 1517 | const int range_mask = 0x3; /* masks unipolar/bipolar bit off range */ |
a69cc3a9 FMH |
1518 | const int range_bitshift = 8; |
1519 | ||
1520 | n = cmd.chanlist_len; | |
a351ecf3 | 1521 | /* spinlock protects indirect addressing */ |
5f74ea14 | 1522 | spin_lock_irqsave(&dev->spinlock, irq_flags); |
a69cc3a9 FMH |
1523 | outb(QRAM, dev->iobase + DAS1800_SELECT); /* select QRAM for baseAddress + 0x0 */ |
1524 | outb(n - 1, dev->iobase + DAS1800_QRAM_ADDRESS); /*set QRAM address start */ | |
1525 | /* make channel / gain list */ | |
1526 | for (i = 0; i < n; i++) { | |
1527 | chan_range = | |
0a85b6f0 MT |
1528 | CR_CHAN(cmd. |
1529 | chanlist[i]) | ((CR_RANGE(cmd.chanlist[i]) & | |
1530 | range_mask) << range_bitshift); | |
a69cc3a9 FMH |
1531 | outw(chan_range, dev->iobase + DAS1800_QRAM); |
1532 | } | |
1533 | outb(n - 1, dev->iobase + DAS1800_QRAM_ADDRESS); /*finish write to QRAM */ | |
5f74ea14 | 1534 | spin_unlock_irqrestore(&dev->spinlock, irq_flags); |
a69cc3a9 FMH |
1535 | |
1536 | return; | |
1537 | } | |
1538 | ||
a351ecf3 | 1539 | /* analog input do_cmd */ |
0a85b6f0 MT |
1540 | static int das1800_ai_do_cmd(struct comedi_device *dev, |
1541 | struct comedi_subdevice *s) | |
a69cc3a9 FMH |
1542 | { |
1543 | int ret; | |
1544 | int control_a, control_c; | |
d163679c | 1545 | struct comedi_async *async = s->async; |
ea6d0d4c | 1546 | struct comedi_cmd cmd = async->cmd; |
a69cc3a9 FMH |
1547 | |
1548 | if (!dev->irq) { | |
1549 | comedi_error(dev, | |
0a85b6f0 | 1550 | "no irq assigned for das-1800, cannot do hardware conversions"); |
a69cc3a9 FMH |
1551 | return -1; |
1552 | } | |
1553 | ||
1554 | /* disable dma on TRIG_WAKE_EOS, or TRIG_RT | |
1555 | * (because dma in handler is unsafe at hard real-time priority) */ | |
1556 | if (cmd.flags & (TRIG_WAKE_EOS | TRIG_RT)) { | |
1557 | devpriv->irq_dma_bits &= ~DMA_ENABLED; | |
1558 | } else { | |
1559 | devpriv->irq_dma_bits |= devpriv->dma_bits; | |
1560 | } | |
a351ecf3 | 1561 | /* interrupt on end of conversion for TRIG_WAKE_EOS */ |
a69cc3a9 | 1562 | if (cmd.flags & TRIG_WAKE_EOS) { |
a351ecf3 | 1563 | /* interrupt fifo not empty */ |
a69cc3a9 FMH |
1564 | devpriv->irq_dma_bits &= ~FIMD; |
1565 | } else { | |
a351ecf3 | 1566 | /* interrupt fifo half full */ |
a69cc3a9 FMH |
1567 | devpriv->irq_dma_bits |= FIMD; |
1568 | } | |
a351ecf3 | 1569 | /* determine how many conversions we need */ |
a69cc3a9 FMH |
1570 | if (cmd.stop_src == TRIG_COUNT) { |
1571 | devpriv->count = cmd.stop_arg * cmd.chanlist_len; | |
1572 | } | |
1573 | ||
1574 | das1800_cancel(dev, s); | |
1575 | ||
a351ecf3 | 1576 | /* determine proper bits for control registers */ |
a69cc3a9 FMH |
1577 | control_a = control_a_bits(cmd); |
1578 | control_c = control_c_bits(cmd); | |
1579 | ||
1580 | /* setup card and start */ | |
1581 | program_chanlist(dev, cmd); | |
1582 | ret = setup_counters(dev, cmd); | |
1583 | if (ret < 0) { | |
1584 | comedi_error(dev, "Error setting up counters"); | |
1585 | return ret; | |
1586 | } | |
1587 | setup_dma(dev, cmd); | |
1588 | outb(control_c, dev->iobase + DAS1800_CONTROL_C); | |
a351ecf3 | 1589 | /* set conversion rate and length for burst mode */ |
a69cc3a9 | 1590 | if (control_c & BMDE) { |
a351ecf3 | 1591 | /* program conversion period with number of microseconds minus 1 */ |
a69cc3a9 | 1592 | outb(cmd.convert_arg / 1000 - 1, |
0a85b6f0 | 1593 | dev->iobase + DAS1800_BURST_RATE); |
a69cc3a9 FMH |
1594 | outb(cmd.chanlist_len - 1, dev->iobase + DAS1800_BURST_LENGTH); |
1595 | } | |
a351ecf3 | 1596 | outb(devpriv->irq_dma_bits, dev->iobase + DAS1800_CONTROL_B); /* enable irq/dma */ |
a69cc3a9 FMH |
1597 | outb(control_a, dev->iobase + DAS1800_CONTROL_A); /* enable fifo and triggering */ |
1598 | outb(CVEN, dev->iobase + DAS1800_STATUS); /* enable conversions */ | |
1599 | ||
1600 | return 0; | |
1601 | } | |
1602 | ||
1603 | /* read analog input */ | |
0a85b6f0 MT |
1604 | static int das1800_ai_rinsn(struct comedi_device *dev, |
1605 | struct comedi_subdevice *s, | |
1606 | struct comedi_insn *insn, unsigned int *data) | |
a69cc3a9 FMH |
1607 | { |
1608 | int i, n; | |
1609 | int chan, range, aref, chan_range; | |
1610 | int timeout = 1000; | |
1611 | short dpnt; | |
1612 | int conv_flags = 0; | |
1613 | unsigned long irq_flags; | |
1614 | ||
1615 | /* set up analog reference and unipolar / bipolar mode */ | |
1616 | aref = CR_AREF(insn->chanspec); | |
1617 | conv_flags |= UQEN; | |
1618 | if (aref != AREF_DIFF) | |
1619 | conv_flags |= SD; | |
1620 | if (aref == AREF_COMMON) | |
1621 | conv_flags |= CMEN; | |
1622 | /* if a unipolar range was selected */ | |
1623 | if (CR_RANGE(insn->chanspec) & UNIPOLAR) | |
1624 | conv_flags |= UB; | |
1625 | ||
1626 | outb(conv_flags, dev->iobase + DAS1800_CONTROL_C); /* software conversion enabled */ | |
1627 | outb(CVEN, dev->iobase + DAS1800_STATUS); /* enable conversions */ | |
1628 | outb(0x0, dev->iobase + DAS1800_CONTROL_A); /* reset fifo */ | |
1629 | outb(FFEN, dev->iobase + DAS1800_CONTROL_A); | |
1630 | ||
1631 | chan = CR_CHAN(insn->chanspec); | |
1632 | /* mask of unipolar/bipolar bit from range */ | |
1633 | range = CR_RANGE(insn->chanspec) & 0x3; | |
1634 | chan_range = chan | (range << 8); | |
5f74ea14 | 1635 | spin_lock_irqsave(&dev->spinlock, irq_flags); |
a69cc3a9 FMH |
1636 | outb(QRAM, dev->iobase + DAS1800_SELECT); /* select QRAM for baseAddress + 0x0 */ |
1637 | outb(0x0, dev->iobase + DAS1800_QRAM_ADDRESS); /* set QRAM address start */ | |
1638 | outw(chan_range, dev->iobase + DAS1800_QRAM); | |
1639 | outb(0x0, dev->iobase + DAS1800_QRAM_ADDRESS); /*finish write to QRAM */ | |
1640 | outb(ADC, dev->iobase + DAS1800_SELECT); /* select ADC for baseAddress + 0x0 */ | |
1641 | ||
1642 | for (n = 0; n < insn->n; n++) { | |
1643 | /* trigger conversion */ | |
1644 | outb(0, dev->iobase + DAS1800_FIFO); | |
1645 | for (i = 0; i < timeout; i++) { | |
1646 | if (inb(dev->iobase + DAS1800_STATUS) & FNE) | |
1647 | break; | |
1648 | } | |
1649 | if (i == timeout) { | |
1650 | comedi_error(dev, "timeout"); | |
d18c5906 GKH |
1651 | n = -ETIME; |
1652 | goto exit; | |
a69cc3a9 FMH |
1653 | } |
1654 | dpnt = inw(dev->iobase + DAS1800_FIFO); | |
1655 | /* shift data to offset binary for bipolar ranges */ | |
1656 | if ((conv_flags & UB) == 0) | |
1657 | dpnt += 1 << (thisboard->resolution - 1); | |
1658 | data[n] = dpnt; | |
1659 | } | |
d18c5906 | 1660 | exit: |
5f74ea14 | 1661 | spin_unlock_irqrestore(&dev->spinlock, irq_flags); |
a69cc3a9 FMH |
1662 | |
1663 | return n; | |
1664 | } | |
1665 | ||
1666 | /* writes to an analog output channel */ | |
0a85b6f0 MT |
1667 | static int das1800_ao_winsn(struct comedi_device *dev, |
1668 | struct comedi_subdevice *s, | |
1669 | struct comedi_insn *insn, unsigned int *data) | |
a69cc3a9 FMH |
1670 | { |
1671 | int chan = CR_CHAN(insn->chanspec); | |
a351ecf3 | 1672 | /* int range = CR_RANGE(insn->chanspec); */ |
a69cc3a9 FMH |
1673 | int update_chan = thisboard->ao_n_chan - 1; |
1674 | short output; | |
1675 | unsigned long irq_flags; | |
1676 | ||
a351ecf3 | 1677 | /* card expects two's complement data */ |
a69cc3a9 | 1678 | output = data[0] - (1 << (thisboard->resolution - 1)); |
a351ecf3 | 1679 | /* if the write is to the 'update' channel, we need to remember its value */ |
a69cc3a9 FMH |
1680 | if (chan == update_chan) |
1681 | devpriv->ao_update_bits = output; | |
a351ecf3 | 1682 | /* write to channel */ |
5f74ea14 | 1683 | spin_lock_irqsave(&dev->spinlock, irq_flags); |
a69cc3a9 FMH |
1684 | outb(DAC(chan), dev->iobase + DAS1800_SELECT); /* select dac channel for baseAddress + 0x0 */ |
1685 | outw(output, dev->iobase + DAS1800_DAC); | |
a351ecf3 | 1686 | /* now we need to write to 'update' channel to update all dac channels */ |
a69cc3a9 FMH |
1687 | if (chan != update_chan) { |
1688 | outb(DAC(update_chan), dev->iobase + DAS1800_SELECT); /* select 'update' channel for baseAddress + 0x0 */ | |
1689 | outw(devpriv->ao_update_bits, dev->iobase + DAS1800_DAC); | |
1690 | } | |
5f74ea14 | 1691 | spin_unlock_irqrestore(&dev->spinlock, irq_flags); |
a69cc3a9 FMH |
1692 | |
1693 | return 1; | |
1694 | } | |
1695 | ||
1696 | /* reads from digital input channels */ | |
0a85b6f0 MT |
1697 | static int das1800_di_rbits(struct comedi_device *dev, |
1698 | struct comedi_subdevice *s, | |
1699 | struct comedi_insn *insn, unsigned int *data) | |
a69cc3a9 FMH |
1700 | { |
1701 | ||
1702 | data[1] = inb(dev->iobase + DAS1800_DIGITAL) & 0xf; | |
1703 | data[0] = 0; | |
1704 | ||
1705 | return 2; | |
1706 | } | |
1707 | ||
1708 | /* writes to digital output channels */ | |
0a85b6f0 MT |
1709 | static int das1800_do_wbits(struct comedi_device *dev, |
1710 | struct comedi_subdevice *s, | |
1711 | struct comedi_insn *insn, unsigned int *data) | |
a69cc3a9 | 1712 | { |
790c5541 | 1713 | unsigned int wbits; |
a69cc3a9 | 1714 | |
a351ecf3 | 1715 | /* only set bits that have been masked */ |
a69cc3a9 FMH |
1716 | data[0] &= (1 << s->n_chan) - 1; |
1717 | wbits = devpriv->do_bits; | |
1718 | wbits &= ~data[0]; | |
1719 | wbits |= data[0] & data[1]; | |
1720 | devpriv->do_bits = wbits; | |
1721 | ||
1722 | outb(devpriv->do_bits, dev->iobase + DAS1800_DIGITAL); | |
1723 | ||
1724 | data[1] = devpriv->do_bits; | |
1725 | ||
1726 | return 2; | |
1727 | } | |
1728 | ||
1729 | /* loads counters with divisor1, divisor2 from private structure */ | |
da91b269 | 1730 | static int das1800_set_frequency(struct comedi_device *dev) |
a69cc3a9 FMH |
1731 | { |
1732 | int err = 0; | |
1733 | ||
a351ecf3 | 1734 | /* counter 1, mode 2 */ |
a69cc3a9 | 1735 | if (i8254_load(dev->iobase + DAS1800_COUNTER, 0, 1, devpriv->divisor1, |
0a85b6f0 | 1736 | 2)) |
a69cc3a9 | 1737 | err++; |
a351ecf3 | 1738 | /* counter 2, mode 2 */ |
a69cc3a9 | 1739 | if (i8254_load(dev->iobase + DAS1800_COUNTER, 0, 2, devpriv->divisor2, |
0a85b6f0 | 1740 | 2)) |
a69cc3a9 FMH |
1741 | err++; |
1742 | if (err) | |
1743 | return -1; | |
1744 | ||
1745 | return 0; | |
1746 | } | |
1747 | ||
1748 | /* converts requested conversion timing to timing compatible with | |
1749 | * hardware, used only when card is in 'burst mode' | |
1750 | */ | |
1751 | static unsigned int burst_convert_arg(unsigned int convert_arg, int round_mode) | |
1752 | { | |
1753 | unsigned int micro_sec; | |
1754 | ||
a351ecf3 | 1755 | /* in burst mode, the maximum conversion time is 64 microseconds */ |
a69cc3a9 FMH |
1756 | if (convert_arg > 64000) |
1757 | convert_arg = 64000; | |
1758 | ||
a351ecf3 | 1759 | /* the conversion time must be an integral number of microseconds */ |
a69cc3a9 FMH |
1760 | switch (round_mode) { |
1761 | case TRIG_ROUND_NEAREST: | |
1762 | default: | |
1763 | micro_sec = (convert_arg + 500) / 1000; | |
1764 | break; | |
1765 | case TRIG_ROUND_DOWN: | |
1766 | micro_sec = convert_arg / 1000; | |
1767 | break; | |
1768 | case TRIG_ROUND_UP: | |
1769 | micro_sec = (convert_arg - 1) / 1000 + 1; | |
1770 | break; | |
1771 | } | |
1772 | ||
a351ecf3 | 1773 | /* return number of nanoseconds */ |
a69cc3a9 FMH |
1774 | return micro_sec * 1000; |
1775 | } | |
1776 | ||
a351ecf3 | 1777 | /* utility function that suggests a dma transfer size based on the conversion period 'ns' */ |
da91b269 | 1778 | static unsigned int suggest_transfer_size(struct comedi_cmd *cmd) |
a69cc3a9 FMH |
1779 | { |
1780 | unsigned int size = DMA_BUF_SIZE; | |
a351ecf3 BP |
1781 | static const int sample_size = 2; /* size in bytes of one sample from board */ |
1782 | unsigned int fill_time = 300000000; /* target time in nanoseconds for filling dma buffer */ | |
1783 | unsigned int max_size; /* maximum size we will allow for a transfer */ | |
a69cc3a9 | 1784 | |
a351ecf3 | 1785 | /* make dma buffer fill in 0.3 seconds for timed modes */ |
a69cc3a9 | 1786 | switch (cmd->scan_begin_src) { |
a351ecf3 | 1787 | case TRIG_FOLLOW: /* not in burst mode */ |
a69cc3a9 FMH |
1788 | if (cmd->convert_src == TRIG_TIMER) |
1789 | size = (fill_time / cmd->convert_arg) * sample_size; | |
1790 | break; | |
1791 | case TRIG_TIMER: | |
1792 | size = (fill_time / (cmd->scan_begin_arg * cmd->chanlist_len)) * | |
0a85b6f0 | 1793 | sample_size; |
a69cc3a9 FMH |
1794 | break; |
1795 | default: | |
1796 | size = DMA_BUF_SIZE; | |
1797 | break; | |
1798 | } | |
1799 | ||
a351ecf3 | 1800 | /* set a minimum and maximum size allowed */ |
a69cc3a9 | 1801 | max_size = DMA_BUF_SIZE; |
a351ecf3 | 1802 | /* if we are taking limited number of conversions, limit transfer size to that */ |
a69cc3a9 | 1803 | if (cmd->stop_src == TRIG_COUNT && |
0a85b6f0 | 1804 | cmd->stop_arg * cmd->chanlist_len * sample_size < max_size) |
a69cc3a9 FMH |
1805 | max_size = cmd->stop_arg * cmd->chanlist_len * sample_size; |
1806 | ||
1807 | if (size > max_size) | |
1808 | size = max_size; | |
1809 | if (size < sample_size) | |
1810 | size = sample_size; | |
1811 | ||
1812 | return size; | |
1813 | } | |
90f703d3 AT |
1814 | |
1815 | MODULE_AUTHOR("Comedi http://www.comedi.org"); | |
1816 | MODULE_DESCRIPTION("Comedi low-level driver"); | |
1817 | MODULE_LICENSE("GPL"); |