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124b13b2 FMH |
1 | /* |
2 | comedi/drivers/ni_labpc.c | |
3 | Driver for National Instruments Lab-PC series boards and compatibles | |
4 | Copyright (C) 2001, 2002, 2003 Frank Mori Hess <fmhess@users.sourceforge.net> | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | ||
20 | ************************************************************************ | |
21 | */ | |
22 | /* | |
23 | Driver: ni_labpc | |
24 | Description: National Instruments Lab-PC (& compatibles) | |
25 | Author: Frank Mori Hess <fmhess@users.sourceforge.net> | |
26 | Devices: [National Instruments] Lab-PC-1200 (labpc-1200), | |
27 | Lab-PC-1200AI (labpc-1200ai), Lab-PC+ (lab-pc+), PCI-1200 (ni_labpc) | |
28 | Status: works | |
29 | ||
30 | Tested with lab-pc-1200. For the older Lab-PC+, not all input ranges | |
31 | and analog references will work, the available ranges/arefs will | |
32 | depend on how you have configured the jumpers on your board | |
33 | (see your owner's manual). | |
34 | ||
35 | Kernel-level ISA plug-and-play support for the lab-pc-1200 | |
36 | boards has not | |
37 | yet been added to the driver, mainly due to the fact that | |
38 | I don't know the device id numbers. If you have one | |
39 | of these boards, | |
631dd1a8 | 40 | please file a bug report at http://comedi.org/ |
124b13b2 FMH |
41 | so I can get the necessary information from you. |
42 | ||
43 | The 1200 series boards have onboard calibration dacs for correcting | |
44 | analog input/output offsets and gains. The proper settings for these | |
45 | caldacs are stored on the board's eeprom. To read the caldac values | |
46 | from the eeprom and store them into a file that can be then be used by | |
47 | comedilib, use the comedi_calibrate program. | |
48 | ||
49 | Configuration options - ISA boards: | |
50 | [0] - I/O port base address | |
51 | [1] - IRQ (optional, required for timed or externally triggered conversions) | |
52 | [2] - DMA channel (optional) | |
53 | ||
54 | Configuration options - PCI boards: | |
55 | [0] - bus (optional) | |
56 | [1] - slot (optional) | |
57 | ||
58 | The Lab-pc+ has quirky chanlist requirements | |
59 | when scanning multiple channels. Multiple channel scan | |
60 | sequence must start at highest channel, then decrement down to | |
61 | channel 0. The rest of the cards can scan down like lab-pc+ or scan | |
62 | up from channel zero. Chanlists consisting of all one channel | |
63 | are also legal, and allow you to pace conversions in bursts. | |
64 | ||
65 | */ | |
66 | ||
67 | /* | |
68 | ||
69 | NI manuals: | |
70 | 341309a (labpc-1200 register manual) | |
71 | 340914a (pci-1200) | |
72 | 320502b (lab-pc+) | |
73 | ||
74 | */ | |
75 | ||
76 | #undef LABPC_DEBUG | |
f6b49620 | 77 | /* #define LABPC_DEBUG enable debugging messages */ |
124b13b2 | 78 | |
25436dc9 | 79 | #include <linux/interrupt.h> |
5a0e3ad6 | 80 | #include <linux/slab.h> |
124b13b2 FMH |
81 | #include "../comedidev.h" |
82 | ||
83 | #include <linux/delay.h> | |
84 | #include <asm/dma.h> | |
85 | ||
86 | #include "8253.h" | |
87 | #include "8255.h" | |
88 | #include "mite.h" | |
89 | #include "comedi_fc.h" | |
90 | #include "ni_labpc.h" | |
91 | ||
92 | #define DRV_NAME "ni_labpc" | |
93 | ||
e41a6f6d SR |
94 | /* size of io region used by board */ |
95 | #define LABPC_SIZE 32 | |
96 | /* 2 MHz master clock */ | |
97 | #define LABPC_TIMER_BASE 500 | |
124b13b2 FMH |
98 | |
99 | /* Registers for the lab-pc+ */ | |
100 | ||
f6b49620 | 101 | /* write-only registers */ |
124b13b2 FMH |
102 | #define COMMAND1_REG 0x0 |
103 | #define ADC_GAIN_MASK (0x7 << 4) | |
104 | #define ADC_CHAN_BITS(x) ((x) & 0x7) | |
e41a6f6d SR |
105 | /* enables multi channel scans */ |
106 | #define ADC_SCAN_EN_BIT 0x80 | |
124b13b2 | 107 | #define COMMAND2_REG 0x1 |
e41a6f6d SR |
108 | /* enable pretriggering (used in conjunction with SWTRIG) */ |
109 | #define PRETRIG_BIT 0x1 | |
110 | /* enable paced conversions on external trigger */ | |
111 | #define HWTRIG_BIT 0x2 | |
112 | /* enable paced conversions */ | |
113 | #define SWTRIG_BIT 0x4 | |
114 | /* use two cascaded counters for pacing */ | |
115 | #define CASCADE_BIT 0x8 | |
124b13b2 FMH |
116 | #define DAC_PACED_BIT(channel) (0x40 << ((channel) & 0x1)) |
117 | #define COMMAND3_REG 0x2 | |
e41a6f6d SR |
118 | /* enable dma transfers */ |
119 | #define DMA_EN_BIT 0x1 | |
120 | /* enable interrupts for 8255 */ | |
121 | #define DIO_INTR_EN_BIT 0x2 | |
122 | /* enable dma terminal count interrupt */ | |
123 | #define DMATC_INTR_EN_BIT 0x4 | |
124 | /* enable timer interrupt */ | |
125 | #define TIMER_INTR_EN_BIT 0x8 | |
126 | /* enable error interrupt */ | |
127 | #define ERR_INTR_EN_BIT 0x10 | |
128 | /* enable fifo not empty interrupt */ | |
129 | #define ADC_FNE_INTR_EN_BIT 0x20 | |
124b13b2 FMH |
130 | #define ADC_CONVERT_REG 0x3 |
131 | #define DAC_LSB_REG(channel) (0x4 + 2 * ((channel) & 0x1)) | |
132 | #define DAC_MSB_REG(channel) (0x5 + 2 * ((channel) & 0x1)) | |
133 | #define ADC_CLEAR_REG 0x8 | |
134 | #define DMATC_CLEAR_REG 0xa | |
135 | #define TIMER_CLEAR_REG 0xc | |
e41a6f6d SR |
136 | /* 1200 boards only */ |
137 | #define COMMAND6_REG 0xe | |
138 | /* select ground or common-mode reference */ | |
139 | #define ADC_COMMON_BIT 0x1 | |
140 | /* adc unipolar */ | |
141 | #define ADC_UNIP_BIT 0x2 | |
142 | /* dac unipolar */ | |
143 | #define DAC_UNIP_BIT(channel) (0x4 << ((channel) & 0x1)) | |
144 | /* enable fifo half full interrupt */ | |
145 | #define ADC_FHF_INTR_EN_BIT 0x20 | |
146 | /* enable interrupt on end of hardware count */ | |
147 | #define A1_INTR_EN_BIT 0x40 | |
148 | /* scan up from channel zero instead of down to zero */ | |
149 | #define ADC_SCAN_UP_BIT 0x80 | |
124b13b2 | 150 | #define COMMAND4_REG 0xf |
e41a6f6d SR |
151 | /* enables 'interval' scanning */ |
152 | #define INTERVAL_SCAN_EN_BIT 0x1 | |
153 | /* enables external signal on counter b1 output to trigger scan */ | |
154 | #define EXT_SCAN_EN_BIT 0x2 | |
155 | /* chooses direction (output or input) for EXTCONV* line */ | |
156 | #define EXT_CONVERT_OUT_BIT 0x4 | |
157 | /* chooses differential inputs for adc (in conjunction with board jumper) */ | |
158 | #define ADC_DIFF_BIT 0x8 | |
124b13b2 | 159 | #define EXT_CONVERT_DISABLE_BIT 0x10 |
e41a6f6d SR |
160 | /* 1200 boards only, calibration stuff */ |
161 | #define COMMAND5_REG 0x1c | |
162 | /* enable eeprom for write */ | |
163 | #define EEPROM_WRITE_UNPROTECT_BIT 0x4 | |
164 | /* enable dithering */ | |
165 | #define DITHER_EN_BIT 0x8 | |
166 | /* load calibration dac */ | |
167 | #define CALDAC_LOAD_BIT 0x10 | |
168 | /* serial clock - rising edge writes, falling edge reads */ | |
169 | #define SCLOCK_BIT 0x20 | |
170 | /* serial data bit for writing to eeprom or calibration dacs */ | |
171 | #define SDATA_BIT 0x40 | |
172 | /* enable eeprom for read/write */ | |
173 | #define EEPROM_EN_BIT 0x80 | |
124b13b2 FMH |
174 | #define INTERVAL_COUNT_REG 0x1e |
175 | #define INTERVAL_LOAD_REG 0x1f | |
176 | #define INTERVAL_LOAD_BITS 0x1 | |
177 | ||
f6b49620 | 178 | /* read-only registers */ |
124b13b2 | 179 | #define STATUS1_REG 0x0 |
e41a6f6d SR |
180 | /* data is available in fifo */ |
181 | #define DATA_AVAIL_BIT 0x1 | |
182 | /* overrun has occurred */ | |
183 | #define OVERRUN_BIT 0x2 | |
184 | /* fifo overflow */ | |
185 | #define OVERFLOW_BIT 0x4 | |
25985edc | 186 | /* timer interrupt has occurred */ |
e41a6f6d | 187 | #define TIMER_BIT 0x8 |
25985edc | 188 | /* dma terminal count has occurred */ |
e41a6f6d | 189 | #define DMATC_BIT 0x10 |
25985edc | 190 | /* external trigger has occurred */ |
e41a6f6d SR |
191 | #define EXT_TRIG_BIT 0x40 |
192 | /* 1200 boards only */ | |
193 | #define STATUS2_REG 0x1d | |
194 | /* programmable eeprom serial output */ | |
195 | #define EEPROM_OUT_BIT 0x1 | |
196 | /* counter A1 terminal count */ | |
197 | #define A1_TC_BIT 0x2 | |
198 | /* fifo not half full */ | |
199 | #define FNHF_BIT 0x4 | |
124b13b2 FMH |
200 | #define ADC_FIFO_REG 0xa |
201 | ||
202 | #define DIO_BASE_REG 0x10 | |
203 | #define COUNTER_A_BASE_REG 0x14 | |
204 | #define COUNTER_A_CONTROL_REG (COUNTER_A_BASE_REG + 0x3) | |
e41a6f6d SR |
205 | /* check modes put conversion pacer output in harmless state (a0 mode 2) */ |
206 | #define INIT_A0_BITS 0x14 | |
207 | /* put hardware conversion counter output in harmless state (a1 mode 0) */ | |
208 | #define INIT_A1_BITS 0x70 | |
124b13b2 FMH |
209 | #define COUNTER_B_BASE_REG 0x18 |
210 | ||
814900c9 BP |
211 | static int labpc_attach(struct comedi_device *dev, struct comedi_devconfig *it); |
212 | static int labpc_cancel(struct comedi_device *dev, struct comedi_subdevice *s); | |
70265d24 | 213 | static irqreturn_t labpc_interrupt(int irq, void *d); |
814900c9 BP |
214 | static int labpc_drain_fifo(struct comedi_device *dev); |
215 | static void labpc_drain_dma(struct comedi_device *dev); | |
216 | static void handle_isa_dma(struct comedi_device *dev); | |
217 | static void labpc_drain_dregs(struct comedi_device *dev); | |
0a85b6f0 MT |
218 | static int labpc_ai_cmdtest(struct comedi_device *dev, |
219 | struct comedi_subdevice *s, struct comedi_cmd *cmd); | |
814900c9 BP |
220 | static int labpc_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s); |
221 | static int labpc_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s, | |
0a85b6f0 | 222 | struct comedi_insn *insn, unsigned int *data); |
814900c9 | 223 | static int labpc_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s, |
0a85b6f0 | 224 | struct comedi_insn *insn, unsigned int *data); |
814900c9 | 225 | static int labpc_ao_rinsn(struct comedi_device *dev, struct comedi_subdevice *s, |
0a85b6f0 MT |
226 | struct comedi_insn *insn, unsigned int *data); |
227 | static int labpc_calib_read_insn(struct comedi_device *dev, | |
228 | struct comedi_subdevice *s, | |
229 | struct comedi_insn *insn, unsigned int *data); | |
230 | static int labpc_calib_write_insn(struct comedi_device *dev, | |
231 | struct comedi_subdevice *s, | |
232 | struct comedi_insn *insn, unsigned int *data); | |
233 | static int labpc_eeprom_read_insn(struct comedi_device *dev, | |
234 | struct comedi_subdevice *s, | |
235 | struct comedi_insn *insn, unsigned int *data); | |
236 | static int labpc_eeprom_write_insn(struct comedi_device *dev, | |
237 | struct comedi_subdevice *s, | |
238 | struct comedi_insn *insn, | |
239 | unsigned int *data); | |
ea6d0d4c | 240 | static unsigned int labpc_suggest_transfer_size(struct comedi_cmd cmd); |
814900c9 | 241 | static void labpc_adc_timing(struct comedi_device *dev, struct comedi_cmd *cmd); |
124b13b2 | 242 | #ifdef CONFIG_COMEDI_PCI |
71b5f4f1 | 243 | static int labpc_find_device(struct comedi_device *dev, int bus, int slot); |
124b13b2 FMH |
244 | #endif |
245 | static int labpc_dio_mem_callback(int dir, int port, int data, | |
0a85b6f0 | 246 | unsigned long arg); |
814900c9 | 247 | static void labpc_serial_out(struct comedi_device *dev, unsigned int value, |
0a85b6f0 | 248 | unsigned int num_bits); |
814900c9 BP |
249 | static unsigned int labpc_serial_in(struct comedi_device *dev); |
250 | static unsigned int labpc_eeprom_read(struct comedi_device *dev, | |
0a85b6f0 | 251 | unsigned int address); |
814900c9 | 252 | static unsigned int labpc_eeprom_read_status(struct comedi_device *dev); |
d6269644 | 253 | static int labpc_eeprom_write(struct comedi_device *dev, |
0a85b6f0 MT |
254 | unsigned int address, |
255 | unsigned int value); | |
814900c9 | 256 | static void write_caldac(struct comedi_device *dev, unsigned int channel, |
0a85b6f0 | 257 | unsigned int value); |
124b13b2 FMH |
258 | |
259 | enum scan_mode { | |
260 | MODE_SINGLE_CHAN, | |
261 | MODE_SINGLE_CHAN_INTERVAL, | |
262 | MODE_MULT_CHAN_UP, | |
263 | MODE_MULT_CHAN_DOWN, | |
264 | }; | |
265 | ||
f6b49620 | 266 | /* analog input ranges */ |
124b13b2 | 267 | #define NUM_LABPC_PLUS_AI_RANGES 16 |
f6b49620 | 268 | /* indicates unipolar ranges */ |
124b13b2 FMH |
269 | static const int labpc_plus_is_unipolar[NUM_LABPC_PLUS_AI_RANGES] = { |
270 | 0, | |
271 | 0, | |
272 | 0, | |
273 | 0, | |
274 | 0, | |
275 | 0, | |
276 | 0, | |
277 | 0, | |
278 | 1, | |
279 | 1, | |
280 | 1, | |
281 | 1, | |
282 | 1, | |
283 | 1, | |
284 | 1, | |
285 | 1, | |
286 | }; | |
287 | ||
f6b49620 | 288 | /* map range index to gain bits */ |
124b13b2 FMH |
289 | static const int labpc_plus_ai_gain_bits[NUM_LABPC_PLUS_AI_RANGES] = { |
290 | 0x00, | |
291 | 0x10, | |
292 | 0x20, | |
293 | 0x30, | |
294 | 0x40, | |
295 | 0x50, | |
296 | 0x60, | |
297 | 0x70, | |
298 | 0x00, | |
299 | 0x10, | |
300 | 0x20, | |
301 | 0x30, | |
302 | 0x40, | |
303 | 0x50, | |
304 | 0x60, | |
305 | 0x70, | |
306 | }; | |
0a85b6f0 | 307 | |
9ced1de6 | 308 | static const struct comedi_lrange range_labpc_plus_ai = { |
124b13b2 FMH |
309 | NUM_LABPC_PLUS_AI_RANGES, |
310 | { | |
0a85b6f0 MT |
311 | BIP_RANGE(5), |
312 | BIP_RANGE(4), | |
313 | BIP_RANGE(2.5), | |
314 | BIP_RANGE(1), | |
315 | BIP_RANGE(0.5), | |
316 | BIP_RANGE(0.25), | |
317 | BIP_RANGE(0.1), | |
318 | BIP_RANGE(0.05), | |
319 | UNI_RANGE(10), | |
320 | UNI_RANGE(8), | |
321 | UNI_RANGE(5), | |
322 | UNI_RANGE(2), | |
323 | UNI_RANGE(1), | |
324 | UNI_RANGE(0.5), | |
325 | UNI_RANGE(0.2), | |
326 | UNI_RANGE(0.1), | |
327 | } | |
124b13b2 FMH |
328 | }; |
329 | ||
330 | #define NUM_LABPC_1200_AI_RANGES 14 | |
f6b49620 | 331 | /* indicates unipolar ranges */ |
124b13b2 FMH |
332 | const int labpc_1200_is_unipolar[NUM_LABPC_1200_AI_RANGES] = { |
333 | 0, | |
334 | 0, | |
335 | 0, | |
336 | 0, | |
337 | 0, | |
338 | 0, | |
339 | 0, | |
340 | 1, | |
341 | 1, | |
342 | 1, | |
343 | 1, | |
344 | 1, | |
345 | 1, | |
346 | 1, | |
347 | }; | |
0656bb35 | 348 | EXPORT_SYMBOL_GPL(labpc_1200_is_unipolar); |
124b13b2 | 349 | |
f6b49620 | 350 | /* map range index to gain bits */ |
124b13b2 FMH |
351 | const int labpc_1200_ai_gain_bits[NUM_LABPC_1200_AI_RANGES] = { |
352 | 0x00, | |
353 | 0x20, | |
354 | 0x30, | |
355 | 0x40, | |
356 | 0x50, | |
357 | 0x60, | |
358 | 0x70, | |
359 | 0x00, | |
360 | 0x20, | |
361 | 0x30, | |
362 | 0x40, | |
363 | 0x50, | |
364 | 0x60, | |
365 | 0x70, | |
366 | }; | |
0656bb35 | 367 | EXPORT_SYMBOL_GPL(labpc_1200_ai_gain_bits); |
0a85b6f0 | 368 | |
9ced1de6 | 369 | const struct comedi_lrange range_labpc_1200_ai = { |
124b13b2 FMH |
370 | NUM_LABPC_1200_AI_RANGES, |
371 | { | |
0a85b6f0 MT |
372 | BIP_RANGE(5), |
373 | BIP_RANGE(2.5), | |
374 | BIP_RANGE(1), | |
375 | BIP_RANGE(0.5), | |
376 | BIP_RANGE(0.25), | |
377 | BIP_RANGE(0.1), | |
378 | BIP_RANGE(0.05), | |
379 | UNI_RANGE(10), | |
380 | UNI_RANGE(5), | |
381 | UNI_RANGE(2), | |
382 | UNI_RANGE(1), | |
383 | UNI_RANGE(0.5), | |
384 | UNI_RANGE(0.2), | |
385 | UNI_RANGE(0.1), | |
386 | } | |
124b13b2 | 387 | }; |
0656bb35 | 388 | EXPORT_SYMBOL_GPL(range_labpc_1200_ai); |
124b13b2 | 389 | |
f6b49620 | 390 | /* analog output ranges */ |
124b13b2 | 391 | #define AO_RANGE_IS_UNIPOLAR 0x1 |
9ced1de6 | 392 | static const struct comedi_lrange range_labpc_ao = { |
124b13b2 FMH |
393 | 2, |
394 | { | |
0a85b6f0 MT |
395 | BIP_RANGE(5), |
396 | UNI_RANGE(10), | |
397 | } | |
124b13b2 FMH |
398 | }; |
399 | ||
400 | /* functions that do inb/outb and readb/writeb so we can use | |
401 | * function pointers to decide which to use */ | |
402 | static inline unsigned int labpc_inb(unsigned long address) | |
403 | { | |
404 | return inb(address); | |
405 | } | |
0a85b6f0 | 406 | |
124b13b2 FMH |
407 | static inline void labpc_outb(unsigned int byte, unsigned long address) |
408 | { | |
409 | outb(byte, address); | |
410 | } | |
0a85b6f0 | 411 | |
124b13b2 FMH |
412 | static inline unsigned int labpc_readb(unsigned long address) |
413 | { | |
414 | return readb((void *)address); | |
415 | } | |
0a85b6f0 | 416 | |
124b13b2 FMH |
417 | static inline void labpc_writeb(unsigned int byte, unsigned long address) |
418 | { | |
419 | writeb(byte, (void *)address); | |
420 | } | |
421 | ||
9ad00740 | 422 | static const struct labpc_board_struct labpc_boards[] = { |
124b13b2 | 423 | { |
0a85b6f0 MT |
424 | .name = "lab-pc-1200", |
425 | .ai_speed = 10000, | |
426 | .bustype = isa_bustype, | |
427 | .register_layout = labpc_1200_layout, | |
428 | .has_ao = 1, | |
429 | .ai_range_table = &range_labpc_1200_ai, | |
430 | .ai_range_code = labpc_1200_ai_gain_bits, | |
431 | .ai_range_is_unipolar = labpc_1200_is_unipolar, | |
432 | .ai_scan_up = 1, | |
433 | .memory_mapped_io = 0, | |
434 | }, | |
124b13b2 | 435 | { |
0a85b6f0 MT |
436 | .name = "lab-pc-1200ai", |
437 | .ai_speed = 10000, | |
438 | .bustype = isa_bustype, | |
439 | .register_layout = labpc_1200_layout, | |
440 | .has_ao = 0, | |
441 | .ai_range_table = &range_labpc_1200_ai, | |
442 | .ai_range_code = labpc_1200_ai_gain_bits, | |
443 | .ai_range_is_unipolar = labpc_1200_is_unipolar, | |
444 | .ai_scan_up = 1, | |
445 | .memory_mapped_io = 0, | |
446 | }, | |
124b13b2 | 447 | { |
0a85b6f0 MT |
448 | .name = "lab-pc+", |
449 | .ai_speed = 12000, | |
450 | .bustype = isa_bustype, | |
451 | .register_layout = labpc_plus_layout, | |
452 | .has_ao = 1, | |
453 | .ai_range_table = &range_labpc_plus_ai, | |
454 | .ai_range_code = labpc_plus_ai_gain_bits, | |
455 | .ai_range_is_unipolar = labpc_plus_is_unipolar, | |
456 | .ai_scan_up = 0, | |
457 | .memory_mapped_io = 0, | |
458 | }, | |
124b13b2 FMH |
459 | #ifdef CONFIG_COMEDI_PCI |
460 | { | |
0a85b6f0 MT |
461 | .name = "pci-1200", |
462 | .device_id = 0x161, | |
463 | .ai_speed = 10000, | |
464 | .bustype = pci_bustype, | |
465 | .register_layout = labpc_1200_layout, | |
466 | .has_ao = 1, | |
467 | .ai_range_table = &range_labpc_1200_ai, | |
468 | .ai_range_code = labpc_1200_ai_gain_bits, | |
469 | .ai_range_is_unipolar = labpc_1200_is_unipolar, | |
470 | .ai_scan_up = 1, | |
471 | .memory_mapped_io = 1, | |
472 | }, | |
e41a6f6d | 473 | /* dummy entry so pci board works when comedi_config is passed driver name */ |
124b13b2 | 474 | { |
0a85b6f0 MT |
475 | .name = DRV_NAME, |
476 | .bustype = pci_bustype, | |
477 | }, | |
124b13b2 FMH |
478 | #endif |
479 | }; | |
480 | ||
481 | /* | |
482 | * Useful for shorthand access to the particular board structure | |
483 | */ | |
9ad00740 | 484 | #define thisboard ((struct labpc_board_struct *)dev->board_ptr) |
124b13b2 | 485 | |
e41a6f6d SR |
486 | /* size in bytes of dma buffer */ |
487 | static const int dma_buffer_size = 0xff00; | |
488 | /* 2 bytes per sample */ | |
489 | static const int sample_size = 2; | |
124b13b2 | 490 | |
0a4eb4b6 | 491 | #define devpriv ((struct labpc_private *)dev->private) |
124b13b2 | 492 | |
139dfbdf | 493 | static struct comedi_driver driver_labpc = { |
124b13b2 FMH |
494 | .driver_name = DRV_NAME, |
495 | .module = THIS_MODULE, | |
496 | .attach = labpc_attach, | |
497 | .detach = labpc_common_detach, | |
8629efa4 | 498 | .num_names = ARRAY_SIZE(labpc_boards), |
124b13b2 | 499 | .board_name = &labpc_boards[0].name, |
9ad00740 | 500 | .offset = sizeof(struct labpc_board_struct), |
124b13b2 FMH |
501 | }; |
502 | ||
503 | #ifdef CONFIG_COMEDI_PCI | |
504 | static DEFINE_PCI_DEVICE_TABLE(labpc_pci_table) = { | |
4e40cee9 GKH |
505 | {PCI_DEVICE(PCI_VENDOR_ID_NI, 0x161)}, |
506 | {0} | |
124b13b2 FMH |
507 | }; |
508 | ||
509 | MODULE_DEVICE_TABLE(pci, labpc_pci_table); | |
510 | #endif /* CONFIG_COMEDI_PCI */ | |
511 | ||
da91b269 | 512 | static inline int labpc_counter_load(struct comedi_device *dev, |
0a85b6f0 MT |
513 | unsigned long base_address, |
514 | unsigned int counter_number, | |
515 | unsigned int count, unsigned int mode) | |
124b13b2 FMH |
516 | { |
517 | if (thisboard->memory_mapped_io) | |
518 | return i8254_mm_load((void *)base_address, 0, counter_number, | |
0a85b6f0 | 519 | count, mode); |
124b13b2 FMH |
520 | else |
521 | return i8254_load(base_address, 0, counter_number, count, mode); | |
522 | } | |
523 | ||
da91b269 | 524 | int labpc_common_attach(struct comedi_device *dev, unsigned long iobase, |
0a85b6f0 | 525 | unsigned int irq, unsigned int dma_chan) |
124b13b2 | 526 | { |
34c43922 | 527 | struct comedi_subdevice *s; |
124b13b2 FMH |
528 | int i; |
529 | unsigned long dma_flags, isr_flags; | |
530 | short lsb, msb; | |
531 | ||
88d8ed4b MD |
532 | printk(KERN_ERR "comedi%d: ni_labpc: %s, io 0x%lx", dev->minor, |
533 | thisboard->name, | |
0a85b6f0 | 534 | iobase); |
412bd046 | 535 | if (irq) |
124b13b2 | 536 | printk(", irq %u", irq); |
412bd046 | 537 | if (dma_chan) |
124b13b2 | 538 | printk(", dma %u", dma_chan); |
124b13b2 FMH |
539 | printk("\n"); |
540 | ||
541 | if (iobase == 0) { | |
177d4282 | 542 | printk(KERN_ERR "io base address is zero!\n"); |
124b13b2 FMH |
543 | return -EINVAL; |
544 | } | |
f6b49620 | 545 | /* request io regions for isa boards */ |
124b13b2 FMH |
546 | if (thisboard->bustype == isa_bustype) { |
547 | /* check if io addresses are available */ | |
548 | if (!request_region(iobase, LABPC_SIZE, | |
0a85b6f0 | 549 | driver_labpc.driver_name)) { |
88d8ed4b | 550 | printk(KERN_ERR "I/O port conflict\n"); |
124b13b2 FMH |
551 | return -EIO; |
552 | } | |
553 | } | |
554 | dev->iobase = iobase; | |
555 | ||
556 | if (thisboard->memory_mapped_io) { | |
557 | devpriv->read_byte = labpc_readb; | |
558 | devpriv->write_byte = labpc_writeb; | |
559 | } else { | |
560 | devpriv->read_byte = labpc_inb; | |
561 | devpriv->write_byte = labpc_outb; | |
562 | } | |
e41a6f6d | 563 | /* initialize board's command registers */ |
124b13b2 FMH |
564 | devpriv->write_byte(devpriv->command1_bits, dev->iobase + COMMAND1_REG); |
565 | devpriv->write_byte(devpriv->command2_bits, dev->iobase + COMMAND2_REG); | |
566 | devpriv->write_byte(devpriv->command3_bits, dev->iobase + COMMAND3_REG); | |
567 | devpriv->write_byte(devpriv->command4_bits, dev->iobase + COMMAND4_REG); | |
568 | if (thisboard->register_layout == labpc_1200_layout) { | |
569 | devpriv->write_byte(devpriv->command5_bits, | |
0a85b6f0 | 570 | dev->iobase + COMMAND5_REG); |
124b13b2 | 571 | devpriv->write_byte(devpriv->command6_bits, |
0a85b6f0 | 572 | dev->iobase + COMMAND6_REG); |
124b13b2 FMH |
573 | } |
574 | ||
575 | /* grab our IRQ */ | |
576 | if (irq) { | |
577 | isr_flags = 0; | |
d1ce3184 IA |
578 | if (thisboard->bustype == pci_bustype |
579 | || thisboard->bustype == pcmcia_bustype) | |
124b13b2 | 580 | isr_flags |= IRQF_SHARED; |
5f74ea14 | 581 | if (request_irq(irq, labpc_interrupt, isr_flags, |
124b13b2 | 582 | driver_labpc.driver_name, dev)) { |
88d8ed4b | 583 | printk(KERN_ERR "unable to allocate irq %u\n", irq); |
124b13b2 FMH |
584 | return -EINVAL; |
585 | } | |
586 | } | |
587 | dev->irq = irq; | |
588 | ||
e41a6f6d | 589 | /* grab dma channel */ |
124b13b2 | 590 | if (dma_chan > 3) { |
88d8ed4b | 591 | printk(KERN_ERR " invalid dma channel %u\n", dma_chan); |
124b13b2 FMH |
592 | return -EINVAL; |
593 | } else if (dma_chan) { | |
e41a6f6d | 594 | /* allocate dma buffer */ |
124b13b2 | 595 | devpriv->dma_buffer = |
0a85b6f0 | 596 | kmalloc(dma_buffer_size, GFP_KERNEL | GFP_DMA); |
124b13b2 | 597 | if (devpriv->dma_buffer == NULL) { |
88d8ed4b | 598 | printk(KERN_ERR " failed to allocate dma buffer\n"); |
124b13b2 FMH |
599 | return -ENOMEM; |
600 | } | |
601 | if (request_dma(dma_chan, driver_labpc.driver_name)) { | |
88d8ed4b | 602 | printk(KERN_ERR " failed to allocate dma channel %u\n", |
0a85b6f0 | 603 | dma_chan); |
124b13b2 FMH |
604 | return -EINVAL; |
605 | } | |
606 | devpriv->dma_chan = dma_chan; | |
607 | dma_flags = claim_dma_lock(); | |
608 | disable_dma(devpriv->dma_chan); | |
609 | set_dma_mode(devpriv->dma_chan, DMA_MODE_READ); | |
610 | release_dma_lock(dma_flags); | |
611 | } | |
612 | ||
613 | dev->board_name = thisboard->name; | |
614 | ||
615 | if (alloc_subdevices(dev, 5) < 0) | |
616 | return -ENOMEM; | |
617 | ||
618 | /* analog input subdevice */ | |
619 | s = dev->subdevices + 0; | |
620 | dev->read_subdev = s; | |
621 | s->type = COMEDI_SUBD_AI; | |
622 | s->subdev_flags = | |
0a85b6f0 | 623 | SDF_READABLE | SDF_GROUND | SDF_COMMON | SDF_DIFF | SDF_CMD_READ; |
124b13b2 FMH |
624 | s->n_chan = 8; |
625 | s->len_chanlist = 8; | |
e41a6f6d | 626 | s->maxdata = (1 << 12) - 1; /* 12 bit resolution */ |
124b13b2 FMH |
627 | s->range_table = thisboard->ai_range_table; |
628 | s->do_cmd = labpc_ai_cmd; | |
629 | s->do_cmdtest = labpc_ai_cmdtest; | |
630 | s->insn_read = labpc_ai_rinsn; | |
631 | s->cancel = labpc_cancel; | |
632 | ||
633 | /* analog output */ | |
634 | s = dev->subdevices + 1; | |
635 | if (thisboard->has_ao) { | |
639b9f1e SR |
636 | /* |
637 | * Could provide command support, except it only has a | |
412bd046 | 638 | * one sample hardware buffer for analog output and no |
639b9f1e SR |
639 | * underrun flag. |
640 | */ | |
124b13b2 FMH |
641 | s->type = COMEDI_SUBD_AO; |
642 | s->subdev_flags = SDF_READABLE | SDF_WRITABLE | SDF_GROUND; | |
643 | s->n_chan = NUM_AO_CHAN; | |
f6b49620 | 644 | s->maxdata = (1 << 12) - 1; /* 12 bit resolution */ |
124b13b2 FMH |
645 | s->range_table = &range_labpc_ao; |
646 | s->insn_read = labpc_ao_rinsn; | |
647 | s->insn_write = labpc_ao_winsn; | |
648 | /* initialize analog outputs to a known value */ | |
649 | for (i = 0; i < s->n_chan; i++) { | |
650 | devpriv->ao_value[i] = s->maxdata / 2; | |
651 | lsb = devpriv->ao_value[i] & 0xff; | |
652 | msb = (devpriv->ao_value[i] >> 8) & 0xff; | |
653 | devpriv->write_byte(lsb, dev->iobase + DAC_LSB_REG(i)); | |
654 | devpriv->write_byte(msb, dev->iobase + DAC_MSB_REG(i)); | |
655 | } | |
656 | } else { | |
657 | s->type = COMEDI_SUBD_UNUSED; | |
658 | } | |
659 | ||
660 | /* 8255 dio */ | |
661 | s = dev->subdevices + 2; | |
412bd046 | 662 | /* if board uses io memory we have to give a custom callback |
663 | * function to the 8255 driver */ | |
124b13b2 FMH |
664 | if (thisboard->memory_mapped_io) |
665 | subdev_8255_init(dev, s, labpc_dio_mem_callback, | |
0a85b6f0 | 666 | (unsigned long)(dev->iobase + DIO_BASE_REG)); |
124b13b2 FMH |
667 | else |
668 | subdev_8255_init(dev, s, NULL, dev->iobase + DIO_BASE_REG); | |
669 | ||
f6b49620 | 670 | /* calibration subdevices for boards that have one */ |
124b13b2 FMH |
671 | s = dev->subdevices + 3; |
672 | if (thisboard->register_layout == labpc_1200_layout) { | |
673 | s->type = COMEDI_SUBD_CALIB; | |
674 | s->subdev_flags = SDF_READABLE | SDF_WRITABLE | SDF_INTERNAL; | |
675 | s->n_chan = 16; | |
676 | s->maxdata = 0xff; | |
677 | s->insn_read = labpc_calib_read_insn; | |
678 | s->insn_write = labpc_calib_write_insn; | |
679 | ||
680 | for (i = 0; i < s->n_chan; i++) | |
681 | write_caldac(dev, i, s->maxdata / 2); | |
682 | } else | |
683 | s->type = COMEDI_SUBD_UNUSED; | |
684 | ||
685 | /* EEPROM */ | |
686 | s = dev->subdevices + 4; | |
687 | if (thisboard->register_layout == labpc_1200_layout) { | |
688 | s->type = COMEDI_SUBD_MEMORY; | |
689 | s->subdev_flags = SDF_READABLE | SDF_WRITABLE | SDF_INTERNAL; | |
690 | s->n_chan = EEPROM_SIZE; | |
691 | s->maxdata = 0xff; | |
692 | s->insn_read = labpc_eeprom_read_insn; | |
693 | s->insn_write = labpc_eeprom_write_insn; | |
694 | ||
412bd046 | 695 | for (i = 0; i < EEPROM_SIZE; i++) |
124b13b2 | 696 | devpriv->eeprom_data[i] = labpc_eeprom_read(dev, i); |
124b13b2 | 697 | #ifdef LABPC_DEBUG |
88d8ed4b | 698 | printk(KERN_ERR " eeprom:"); |
412bd046 | 699 | for (i = 0; i < EEPROM_SIZE; i++) |
124b13b2 | 700 | printk(" %i:0x%x ", i, devpriv->eeprom_data[i]); |
124b13b2 FMH |
701 | printk("\n"); |
702 | #endif | |
703 | } else | |
704 | s->type = COMEDI_SUBD_UNUSED; | |
705 | ||
706 | return 0; | |
707 | } | |
0656bb35 | 708 | EXPORT_SYMBOL_GPL(labpc_common_attach); |
124b13b2 | 709 | |
da91b269 | 710 | static int labpc_attach(struct comedi_device *dev, struct comedi_devconfig *it) |
124b13b2 FMH |
711 | { |
712 | unsigned long iobase = 0; | |
713 | unsigned int irq = 0; | |
714 | unsigned int dma_chan = 0; | |
715 | #ifdef CONFIG_COMEDI_PCI | |
716 | int retval; | |
717 | #endif | |
718 | ||
719 | /* allocate and initialize dev->private */ | |
0a4eb4b6 | 720 | if (alloc_private(dev, sizeof(struct labpc_private)) < 0) |
124b13b2 FMH |
721 | return -ENOMEM; |
722 | ||
e41a6f6d | 723 | /* get base address, irq etc. based on bustype */ |
124b13b2 FMH |
724 | switch (thisboard->bustype) { |
725 | case isa_bustype: | |
726 | iobase = it->options[0]; | |
727 | irq = it->options[1]; | |
728 | dma_chan = it->options[2]; | |
729 | break; | |
730 | case pci_bustype: | |
731 | #ifdef CONFIG_COMEDI_PCI | |
732 | retval = labpc_find_device(dev, it->options[0], it->options[1]); | |
412bd046 | 733 | if (retval < 0) |
124b13b2 | 734 | return retval; |
124b13b2 FMH |
735 | retval = mite_setup(devpriv->mite); |
736 | if (retval < 0) | |
737 | return retval; | |
738 | iobase = (unsigned long)devpriv->mite->daq_io_addr; | |
739 | irq = mite_irq(devpriv->mite); | |
740 | #else | |
88d8ed4b MD |
741 | printk(KERN_ERR " this driver has not been built with PCI " |
742 | "support.\n"); | |
124b13b2 FMH |
743 | return -EINVAL; |
744 | #endif | |
745 | break; | |
746 | case pcmcia_bustype: | |
0a85b6f0 MT |
747 | printk |
748 | (" this driver does not support pcmcia cards, use ni_labpc_cs.o\n"); | |
124b13b2 FMH |
749 | return -EINVAL; |
750 | break; | |
751 | default: | |
88d8ed4b | 752 | printk(KERN_ERR "bug! couldn't determine board type\n"); |
124b13b2 FMH |
753 | return -EINVAL; |
754 | break; | |
755 | } | |
756 | ||
757 | return labpc_common_attach(dev, iobase, irq, dma_chan); | |
758 | } | |
759 | ||
f6b49620 | 760 | /* adapted from ni_pcimio for finding mite based boards (pc-1200) */ |
124b13b2 | 761 | #ifdef CONFIG_COMEDI_PCI |
71b5f4f1 | 762 | static int labpc_find_device(struct comedi_device *dev, int bus, int slot) |
124b13b2 FMH |
763 | { |
764 | struct mite_struct *mite; | |
765 | int i; | |
766 | for (mite = mite_devices; mite; mite = mite->next) { | |
767 | if (mite->used) | |
768 | continue; | |
e41a6f6d | 769 | /* if bus/slot are specified then make sure we have the right bus/slot */ |
124b13b2 FMH |
770 | if (bus || slot) { |
771 | if (bus != mite->pcidev->bus->number | |
0a85b6f0 | 772 | || slot != PCI_SLOT(mite->pcidev->devfn)) |
124b13b2 FMH |
773 | continue; |
774 | } | |
775 | for (i = 0; i < driver_labpc.num_names; i++) { | |
776 | if (labpc_boards[i].bustype != pci_bustype) | |
777 | continue; | |
778 | if (mite_device_id(mite) == labpc_boards[i].device_id) { | |
779 | devpriv->mite = mite; | |
e41a6f6d | 780 | /* fixup board pointer, in case we were using the dummy "ni_labpc" entry */ |
124b13b2 FMH |
781 | dev->board_ptr = &labpc_boards[i]; |
782 | return 0; | |
783 | } | |
784 | } | |
785 | } | |
88d8ed4b | 786 | printk(KERN_ERR "no device found\n"); |
124b13b2 FMH |
787 | mite_list_devices(); |
788 | return -EIO; | |
789 | } | |
790 | #endif | |
791 | ||
da91b269 | 792 | int labpc_common_detach(struct comedi_device *dev) |
124b13b2 | 793 | { |
88d8ed4b | 794 | printk(KERN_ERR "comedi%d: ni_labpc: detach\n", dev->minor); |
124b13b2 FMH |
795 | |
796 | if (dev->subdevices) | |
797 | subdev_8255_cleanup(dev, dev->subdevices + 2); | |
798 | ||
799 | /* only free stuff if it has been allocated by _attach */ | |
e4e1f289 | 800 | kfree(devpriv->dma_buffer); |
124b13b2 FMH |
801 | if (devpriv->dma_chan) |
802 | free_dma(devpriv->dma_chan); | |
803 | if (dev->irq) | |
5f74ea14 | 804 | free_irq(dev->irq, dev); |
124b13b2 FMH |
805 | if (thisboard->bustype == isa_bustype && dev->iobase) |
806 | release_region(dev->iobase, LABPC_SIZE); | |
807 | #ifdef CONFIG_COMEDI_PCI | |
808 | if (devpriv->mite) | |
809 | mite_unsetup(devpriv->mite); | |
810 | #endif | |
811 | ||
812 | return 0; | |
813 | }; | |
0656bb35 | 814 | EXPORT_SYMBOL_GPL(labpc_common_detach); |
124b13b2 | 815 | |
da91b269 | 816 | static void labpc_clear_adc_fifo(const struct comedi_device *dev) |
124b13b2 FMH |
817 | { |
818 | devpriv->write_byte(0x1, dev->iobase + ADC_CLEAR_REG); | |
819 | devpriv->read_byte(dev->iobase + ADC_FIFO_REG); | |
820 | devpriv->read_byte(dev->iobase + ADC_FIFO_REG); | |
821 | } | |
822 | ||
da91b269 | 823 | static int labpc_cancel(struct comedi_device *dev, struct comedi_subdevice *s) |
124b13b2 FMH |
824 | { |
825 | unsigned long flags; | |
826 | ||
5f74ea14 | 827 | spin_lock_irqsave(&dev->spinlock, flags); |
124b13b2 FMH |
828 | devpriv->command2_bits &= ~SWTRIG_BIT & ~HWTRIG_BIT & ~PRETRIG_BIT; |
829 | devpriv->write_byte(devpriv->command2_bits, dev->iobase + COMMAND2_REG); | |
5f74ea14 | 830 | spin_unlock_irqrestore(&dev->spinlock, flags); |
124b13b2 FMH |
831 | |
832 | devpriv->command3_bits = 0; | |
833 | devpriv->write_byte(devpriv->command3_bits, dev->iobase + COMMAND3_REG); | |
834 | ||
835 | return 0; | |
836 | } | |
837 | ||
da91b269 | 838 | static enum scan_mode labpc_ai_scan_mode(const struct comedi_cmd *cmd) |
124b13b2 FMH |
839 | { |
840 | if (cmd->chanlist_len == 1) | |
841 | return MODE_SINGLE_CHAN; | |
842 | ||
843 | /* chanlist may be NULL during cmdtest. */ | |
844 | if (cmd->chanlist == NULL) | |
845 | return MODE_MULT_CHAN_UP; | |
846 | ||
847 | if (CR_CHAN(cmd->chanlist[0]) == CR_CHAN(cmd->chanlist[1])) | |
848 | return MODE_SINGLE_CHAN_INTERVAL; | |
849 | ||
850 | if (CR_CHAN(cmd->chanlist[0]) < CR_CHAN(cmd->chanlist[1])) | |
851 | return MODE_MULT_CHAN_UP; | |
852 | ||
853 | if (CR_CHAN(cmd->chanlist[0]) > CR_CHAN(cmd->chanlist[1])) | |
854 | return MODE_MULT_CHAN_DOWN; | |
855 | ||
88d8ed4b | 856 | printk(KERN_ERR "ni_labpc: bug! this should never happen\n"); |
124b13b2 FMH |
857 | |
858 | return 0; | |
859 | } | |
860 | ||
da91b269 | 861 | static int labpc_ai_chanlist_invalid(const struct comedi_device *dev, |
0a85b6f0 | 862 | const struct comedi_cmd *cmd) |
124b13b2 FMH |
863 | { |
864 | int mode, channel, range, aref, i; | |
865 | ||
866 | if (cmd->chanlist == NULL) | |
867 | return 0; | |
868 | ||
869 | mode = labpc_ai_scan_mode(cmd); | |
870 | ||
871 | if (mode == MODE_SINGLE_CHAN) | |
872 | return 0; | |
873 | ||
874 | if (mode == MODE_SINGLE_CHAN_INTERVAL) { | |
875 | if (cmd->chanlist_len > 0xff) { | |
876 | comedi_error(dev, | |
0a85b6f0 | 877 | "ni_labpc: chanlist too long for single channel interval mode\n"); |
124b13b2 FMH |
878 | return 1; |
879 | } | |
880 | } | |
881 | ||
882 | channel = CR_CHAN(cmd->chanlist[0]); | |
883 | range = CR_RANGE(cmd->chanlist[0]); | |
884 | aref = CR_AREF(cmd->chanlist[0]); | |
885 | ||
886 | for (i = 0; i < cmd->chanlist_len; i++) { | |
887 | ||
888 | switch (mode) { | |
889 | case MODE_SINGLE_CHAN_INTERVAL: | |
890 | if (CR_CHAN(cmd->chanlist[i]) != channel) { | |
891 | comedi_error(dev, | |
0a85b6f0 | 892 | "channel scanning order specified in chanlist is not supported by hardware.\n"); |
124b13b2 FMH |
893 | return 1; |
894 | } | |
895 | break; | |
896 | case MODE_MULT_CHAN_UP: | |
897 | if (CR_CHAN(cmd->chanlist[i]) != i) { | |
898 | comedi_error(dev, | |
0a85b6f0 | 899 | "channel scanning order specified in chanlist is not supported by hardware.\n"); |
124b13b2 FMH |
900 | return 1; |
901 | } | |
902 | break; | |
903 | case MODE_MULT_CHAN_DOWN: | |
904 | if (CR_CHAN(cmd->chanlist[i]) != | |
0a85b6f0 | 905 | cmd->chanlist_len - i - 1) { |
124b13b2 | 906 | comedi_error(dev, |
0a85b6f0 | 907 | "channel scanning order specified in chanlist is not supported by hardware.\n"); |
124b13b2 FMH |
908 | return 1; |
909 | } | |
910 | break; | |
911 | default: | |
88d8ed4b | 912 | printk(KERN_ERR "ni_labpc: bug! in chanlist check\n"); |
124b13b2 FMH |
913 | return 1; |
914 | break; | |
915 | } | |
916 | ||
917 | if (CR_RANGE(cmd->chanlist[i]) != range) { | |
918 | comedi_error(dev, | |
0a85b6f0 | 919 | "entries in chanlist must all have the same range\n"); |
124b13b2 FMH |
920 | return 1; |
921 | } | |
922 | ||
923 | if (CR_AREF(cmd->chanlist[i]) != aref) { | |
924 | comedi_error(dev, | |
0a85b6f0 | 925 | "entries in chanlist must all have the same reference\n"); |
124b13b2 FMH |
926 | return 1; |
927 | } | |
928 | } | |
929 | ||
930 | return 0; | |
931 | } | |
932 | ||
da91b269 | 933 | static int labpc_use_continuous_mode(const struct comedi_cmd *cmd) |
124b13b2 FMH |
934 | { |
935 | if (labpc_ai_scan_mode(cmd) == MODE_SINGLE_CHAN) | |
936 | return 1; | |
937 | ||
938 | if (cmd->scan_begin_src == TRIG_FOLLOW) | |
939 | return 1; | |
940 | ||
941 | return 0; | |
942 | } | |
943 | ||
da91b269 | 944 | static unsigned int labpc_ai_convert_period(const struct comedi_cmd *cmd) |
124b13b2 FMH |
945 | { |
946 | if (cmd->convert_src != TRIG_TIMER) | |
947 | return 0; | |
948 | ||
949 | if (labpc_ai_scan_mode(cmd) == MODE_SINGLE_CHAN && | |
0a85b6f0 | 950 | cmd->scan_begin_src == TRIG_TIMER) |
124b13b2 FMH |
951 | return cmd->scan_begin_arg; |
952 | ||
953 | return cmd->convert_arg; | |
954 | } | |
955 | ||
da91b269 | 956 | static void labpc_set_ai_convert_period(struct comedi_cmd *cmd, unsigned int ns) |
124b13b2 FMH |
957 | { |
958 | if (cmd->convert_src != TRIG_TIMER) | |
959 | return; | |
960 | ||
961 | if (labpc_ai_scan_mode(cmd) == MODE_SINGLE_CHAN && | |
0a85b6f0 | 962 | cmd->scan_begin_src == TRIG_TIMER) { |
124b13b2 FMH |
963 | cmd->scan_begin_arg = ns; |
964 | if (cmd->convert_arg > cmd->scan_begin_arg) | |
965 | cmd->convert_arg = cmd->scan_begin_arg; | |
966 | } else | |
967 | cmd->convert_arg = ns; | |
968 | } | |
969 | ||
da91b269 | 970 | static unsigned int labpc_ai_scan_period(const struct comedi_cmd *cmd) |
124b13b2 FMH |
971 | { |
972 | if (cmd->scan_begin_src != TRIG_TIMER) | |
973 | return 0; | |
974 | ||
975 | if (labpc_ai_scan_mode(cmd) == MODE_SINGLE_CHAN && | |
0a85b6f0 | 976 | cmd->convert_src == TRIG_TIMER) |
124b13b2 FMH |
977 | return 0; |
978 | ||
979 | return cmd->scan_begin_arg; | |
980 | } | |
981 | ||
da91b269 | 982 | static void labpc_set_ai_scan_period(struct comedi_cmd *cmd, unsigned int ns) |
124b13b2 FMH |
983 | { |
984 | if (cmd->scan_begin_src != TRIG_TIMER) | |
985 | return; | |
986 | ||
987 | if (labpc_ai_scan_mode(cmd) == MODE_SINGLE_CHAN && | |
0a85b6f0 | 988 | cmd->convert_src == TRIG_TIMER) |
124b13b2 FMH |
989 | return; |
990 | ||
991 | cmd->scan_begin_arg = ns; | |
992 | } | |
993 | ||
0a85b6f0 MT |
994 | static int labpc_ai_cmdtest(struct comedi_device *dev, |
995 | struct comedi_subdevice *s, struct comedi_cmd *cmd) | |
124b13b2 FMH |
996 | { |
997 | int err = 0; | |
998 | int tmp, tmp2; | |
999 | int stop_mask; | |
1000 | ||
1001 | /* step 1: make sure trigger sources are trivially valid */ | |
1002 | ||
1003 | tmp = cmd->start_src; | |
1004 | cmd->start_src &= TRIG_NOW | TRIG_EXT; | |
1005 | if (!cmd->start_src || tmp != cmd->start_src) | |
1006 | err++; | |
1007 | ||
1008 | tmp = cmd->scan_begin_src; | |
1009 | cmd->scan_begin_src &= TRIG_TIMER | TRIG_FOLLOW | TRIG_EXT; | |
1010 | if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src) | |
1011 | err++; | |
1012 | ||
1013 | tmp = cmd->convert_src; | |
1014 | cmd->convert_src &= TRIG_TIMER | TRIG_EXT; | |
1015 | if (!cmd->convert_src || tmp != cmd->convert_src) | |
1016 | err++; | |
1017 | ||
1018 | tmp = cmd->scan_end_src; | |
1019 | cmd->scan_end_src &= TRIG_COUNT; | |
1020 | if (!cmd->scan_end_src || tmp != cmd->scan_end_src) | |
1021 | err++; | |
1022 | ||
1023 | tmp = cmd->stop_src; | |
1024 | stop_mask = TRIG_COUNT | TRIG_NONE; | |
1025 | if (thisboard->register_layout == labpc_1200_layout) | |
1026 | stop_mask |= TRIG_EXT; | |
1027 | cmd->stop_src &= stop_mask; | |
1028 | if (!cmd->stop_src || tmp != cmd->stop_src) | |
1029 | err++; | |
1030 | ||
1031 | if (err) | |
1032 | return 1; | |
1033 | ||
1034 | /* step 2: make sure trigger sources are unique and mutually compatible */ | |
1035 | ||
1036 | if (cmd->start_src != TRIG_NOW && cmd->start_src != TRIG_EXT) | |
1037 | err++; | |
1038 | if (cmd->scan_begin_src != TRIG_TIMER && | |
0a85b6f0 MT |
1039 | cmd->scan_begin_src != TRIG_FOLLOW && |
1040 | cmd->scan_begin_src != TRIG_EXT) | |
124b13b2 FMH |
1041 | err++; |
1042 | if (cmd->convert_src != TRIG_TIMER && cmd->convert_src != TRIG_EXT) | |
1043 | err++; | |
1044 | if (cmd->stop_src != TRIG_COUNT && | |
0a85b6f0 | 1045 | cmd->stop_src != TRIG_EXT && cmd->stop_src != TRIG_NONE) |
124b13b2 FMH |
1046 | err++; |
1047 | ||
e41a6f6d | 1048 | /* can't have external stop and start triggers at once */ |
124b13b2 FMH |
1049 | if (cmd->start_src == TRIG_EXT && cmd->stop_src == TRIG_EXT) |
1050 | err++; | |
1051 | ||
1052 | if (err) | |
1053 | return 2; | |
1054 | ||
1055 | /* step 3: make sure arguments are trivially compatible */ | |
1056 | ||
1057 | if (cmd->start_arg == TRIG_NOW && cmd->start_arg != 0) { | |
1058 | cmd->start_arg = 0; | |
1059 | err++; | |
1060 | } | |
1061 | ||
412bd046 | 1062 | if (!cmd->chanlist_len) |
124b13b2 | 1063 | err++; |
412bd046 | 1064 | |
124b13b2 FMH |
1065 | if (cmd->scan_end_arg != cmd->chanlist_len) { |
1066 | cmd->scan_end_arg = cmd->chanlist_len; | |
1067 | err++; | |
1068 | } | |
1069 | ||
1070 | if (cmd->convert_src == TRIG_TIMER) { | |
1071 | if (cmd->convert_arg < thisboard->ai_speed) { | |
1072 | cmd->convert_arg = thisboard->ai_speed; | |
1073 | err++; | |
1074 | } | |
1075 | } | |
e41a6f6d | 1076 | /* make sure scan timing is not too fast */ |
124b13b2 FMH |
1077 | if (cmd->scan_begin_src == TRIG_TIMER) { |
1078 | if (cmd->convert_src == TRIG_TIMER && | |
0a85b6f0 MT |
1079 | cmd->scan_begin_arg < |
1080 | cmd->convert_arg * cmd->chanlist_len) { | |
124b13b2 | 1081 | cmd->scan_begin_arg = |
0a85b6f0 | 1082 | cmd->convert_arg * cmd->chanlist_len; |
124b13b2 FMH |
1083 | err++; |
1084 | } | |
1085 | if (cmd->scan_begin_arg < | |
0a85b6f0 | 1086 | thisboard->ai_speed * cmd->chanlist_len) { |
124b13b2 | 1087 | cmd->scan_begin_arg = |
0a85b6f0 | 1088 | thisboard->ai_speed * cmd->chanlist_len; |
124b13b2 FMH |
1089 | err++; |
1090 | } | |
1091 | } | |
e41a6f6d | 1092 | /* stop source */ |
124b13b2 FMH |
1093 | switch (cmd->stop_src) { |
1094 | case TRIG_COUNT: | |
1095 | if (!cmd->stop_arg) { | |
1096 | cmd->stop_arg = 1; | |
1097 | err++; | |
1098 | } | |
1099 | break; | |
1100 | case TRIG_NONE: | |
1101 | if (cmd->stop_arg != 0) { | |
1102 | cmd->stop_arg = 0; | |
1103 | err++; | |
1104 | } | |
1105 | break; | |
1309e617 MD |
1106 | /* |
1107 | * TRIG_EXT doesn't care since it doesn't | |
1108 | * trigger off a numbered channel | |
1109 | */ | |
124b13b2 FMH |
1110 | default: |
1111 | break; | |
1112 | } | |
1113 | ||
1114 | if (err) | |
1115 | return 3; | |
1116 | ||
1117 | /* step 4: fix up any arguments */ | |
1118 | ||
1119 | tmp = cmd->convert_arg; | |
1120 | tmp2 = cmd->scan_begin_arg; | |
1121 | labpc_adc_timing(dev, cmd); | |
1122 | if (tmp != cmd->convert_arg || tmp2 != cmd->scan_begin_arg) | |
1123 | err++; | |
1124 | ||
1125 | if (err) | |
1126 | return 4; | |
1127 | ||
1128 | if (labpc_ai_chanlist_invalid(dev, cmd)) | |
1129 | return 5; | |
1130 | ||
1131 | return 0; | |
1132 | } | |
1133 | ||
da91b269 | 1134 | static int labpc_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s) |
124b13b2 FMH |
1135 | { |
1136 | int channel, range, aref; | |
1137 | unsigned long irq_flags; | |
1138 | int ret; | |
d163679c | 1139 | struct comedi_async *async = s->async; |
ea6d0d4c | 1140 | struct comedi_cmd *cmd = &async->cmd; |
124b13b2 FMH |
1141 | enum transfer_type xfer; |
1142 | unsigned long flags; | |
1143 | ||
1144 | if (!dev->irq) { | |
1145 | comedi_error(dev, "no irq assigned, cannot perform command"); | |
1146 | return -1; | |
1147 | } | |
1148 | ||
1149 | range = CR_RANGE(cmd->chanlist[0]); | |
1150 | aref = CR_AREF(cmd->chanlist[0]); | |
1151 | ||
25985edc | 1152 | /* make sure board is disabled before setting up acquisition */ |
5f74ea14 | 1153 | spin_lock_irqsave(&dev->spinlock, flags); |
124b13b2 FMH |
1154 | devpriv->command2_bits &= ~SWTRIG_BIT & ~HWTRIG_BIT & ~PRETRIG_BIT; |
1155 | devpriv->write_byte(devpriv->command2_bits, dev->iobase + COMMAND2_REG); | |
5f74ea14 | 1156 | spin_unlock_irqrestore(&dev->spinlock, flags); |
124b13b2 FMH |
1157 | |
1158 | devpriv->command3_bits = 0; | |
1159 | devpriv->write_byte(devpriv->command3_bits, dev->iobase + COMMAND3_REG); | |
1160 | ||
f6b49620 | 1161 | /* initialize software conversion count */ |
412bd046 | 1162 | if (cmd->stop_src == TRIG_COUNT) |
124b13b2 | 1163 | devpriv->count = cmd->stop_arg * cmd->chanlist_len; |
65d6d26c | 1164 | |
f6b49620 | 1165 | /* setup hardware conversion counter */ |
124b13b2 | 1166 | if (cmd->stop_src == TRIG_EXT) { |
1309e617 MD |
1167 | /* |
1168 | * load counter a1 with count of 3 | |
1169 | * (pc+ manual says this is minimum allowed) using mode 0 | |
1170 | */ | |
124b13b2 | 1171 | ret = labpc_counter_load(dev, dev->iobase + COUNTER_A_BASE_REG, |
0a85b6f0 | 1172 | 1, 3, 0); |
124b13b2 FMH |
1173 | if (ret < 0) { |
1174 | comedi_error(dev, "error loading counter a1"); | |
1175 | return -1; | |
1176 | } | |
1309e617 MD |
1177 | } else /* |
1178 | * otherwise, just put a1 in mode 0 | |
1179 | * with no count to set its output low | |
1180 | */ | |
124b13b2 | 1181 | devpriv->write_byte(INIT_A1_BITS, |
0a85b6f0 | 1182 | dev->iobase + COUNTER_A_CONTROL_REG); |
124b13b2 | 1183 | |
f6b49620 BP |
1184 | /* figure out what method we will use to transfer data */ |
1185 | if (devpriv->dma_chan && /* need a dma channel allocated */ | |
1309e617 MD |
1186 | /* |
1187 | * dma unsafe at RT priority, | |
1188 | * and too much setup time for TRIG_WAKE_EOS for | |
1189 | */ | |
0a85b6f0 MT |
1190 | (cmd->flags & (TRIG_WAKE_EOS | TRIG_RT)) == 0 && |
1191 | /* only available on the isa boards */ | |
1192 | thisboard->bustype == isa_bustype) { | |
124b13b2 | 1193 | xfer = isa_dma_transfer; |
1309e617 MD |
1194 | /* pc-plus has no fifo-half full interrupt */ |
1195 | } else if (thisboard->register_layout == labpc_1200_layout && | |
0a85b6f0 MT |
1196 | /* wake-end-of-scan should interrupt on fifo not empty */ |
1197 | (cmd->flags & TRIG_WAKE_EOS) == 0 && | |
1198 | /* make sure we are taking more than just a few points */ | |
1199 | (cmd->stop_src != TRIG_COUNT || devpriv->count > 256)) { | |
124b13b2 FMH |
1200 | xfer = fifo_half_full_transfer; |
1201 | } else | |
1202 | xfer = fifo_not_empty_transfer; | |
1203 | devpriv->current_transfer = xfer; | |
1204 | ||
f6b49620 | 1205 | /* setup command6 register for 1200 boards */ |
124b13b2 | 1206 | if (thisboard->register_layout == labpc_1200_layout) { |
f6b49620 | 1207 | /* reference inputs to ground or common? */ |
124b13b2 FMH |
1208 | if (aref != AREF_GROUND) |
1209 | devpriv->command6_bits |= ADC_COMMON_BIT; | |
1210 | else | |
1211 | devpriv->command6_bits &= ~ADC_COMMON_BIT; | |
f6b49620 | 1212 | /* bipolar or unipolar range? */ |
124b13b2 FMH |
1213 | if (thisboard->ai_range_is_unipolar[range]) |
1214 | devpriv->command6_bits |= ADC_UNIP_BIT; | |
1215 | else | |
1216 | devpriv->command6_bits &= ~ADC_UNIP_BIT; | |
f6b49620 | 1217 | /* interrupt on fifo half full? */ |
124b13b2 FMH |
1218 | if (xfer == fifo_half_full_transfer) |
1219 | devpriv->command6_bits |= ADC_FHF_INTR_EN_BIT; | |
1220 | else | |
1221 | devpriv->command6_bits &= ~ADC_FHF_INTR_EN_BIT; | |
f6b49620 | 1222 | /* enable interrupt on counter a1 terminal count? */ |
124b13b2 FMH |
1223 | if (cmd->stop_src == TRIG_EXT) |
1224 | devpriv->command6_bits |= A1_INTR_EN_BIT; | |
1225 | else | |
1226 | devpriv->command6_bits &= ~A1_INTR_EN_BIT; | |
f6b49620 | 1227 | /* are we scanning up or down through channels? */ |
124b13b2 FMH |
1228 | if (labpc_ai_scan_mode(cmd) == MODE_MULT_CHAN_UP) |
1229 | devpriv->command6_bits |= ADC_SCAN_UP_BIT; | |
1230 | else | |
1231 | devpriv->command6_bits &= ~ADC_SCAN_UP_BIT; | |
f6b49620 | 1232 | /* write to register */ |
124b13b2 | 1233 | devpriv->write_byte(devpriv->command6_bits, |
0a85b6f0 | 1234 | dev->iobase + COMMAND6_REG); |
124b13b2 FMH |
1235 | } |
1236 | ||
1237 | /* setup channel list, etc (command1 register) */ | |
1238 | devpriv->command1_bits = 0; | |
1239 | if (labpc_ai_scan_mode(cmd) == MODE_MULT_CHAN_UP) | |
1240 | channel = CR_CHAN(cmd->chanlist[cmd->chanlist_len - 1]); | |
1241 | else | |
1242 | channel = CR_CHAN(cmd->chanlist[0]); | |
e41a6f6d | 1243 | /* munge channel bits for differential / scan disabled mode */ |
124b13b2 FMH |
1244 | if (labpc_ai_scan_mode(cmd) != MODE_SINGLE_CHAN && aref == AREF_DIFF) |
1245 | channel *= 2; | |
1246 | devpriv->command1_bits |= ADC_CHAN_BITS(channel); | |
1247 | devpriv->command1_bits |= thisboard->ai_range_code[range]; | |
1248 | devpriv->write_byte(devpriv->command1_bits, dev->iobase + COMMAND1_REG); | |
e41a6f6d | 1249 | /* manual says to set scan enable bit on second pass */ |
124b13b2 | 1250 | if (labpc_ai_scan_mode(cmd) == MODE_MULT_CHAN_UP || |
0a85b6f0 | 1251 | labpc_ai_scan_mode(cmd) == MODE_MULT_CHAN_DOWN) { |
124b13b2 | 1252 | devpriv->command1_bits |= ADC_SCAN_EN_BIT; |
e41a6f6d SR |
1253 | /* need a brief delay before enabling scan, or scan |
1254 | * list will get screwed when you switch | |
124b13b2 | 1255 | * between scan up to scan down mode - dunno why */ |
5f74ea14 | 1256 | udelay(1); |
124b13b2 | 1257 | devpriv->write_byte(devpriv->command1_bits, |
0a85b6f0 | 1258 | dev->iobase + COMMAND1_REG); |
124b13b2 | 1259 | } |
f6b49620 | 1260 | /* setup any external triggering/pacing (command4 register) */ |
124b13b2 FMH |
1261 | devpriv->command4_bits = 0; |
1262 | if (cmd->convert_src != TRIG_EXT) | |
1263 | devpriv->command4_bits |= EXT_CONVERT_DISABLE_BIT; | |
1264 | /* XXX should discard first scan when using interval scanning | |
1265 | * since manual says it is not synced with scan clock */ | |
1266 | if (labpc_use_continuous_mode(cmd) == 0) { | |
1267 | devpriv->command4_bits |= INTERVAL_SCAN_EN_BIT; | |
1268 | if (cmd->scan_begin_src == TRIG_EXT) | |
1269 | devpriv->command4_bits |= EXT_SCAN_EN_BIT; | |
1270 | } | |
f6b49620 | 1271 | /* single-ended/differential */ |
124b13b2 FMH |
1272 | if (aref == AREF_DIFF) |
1273 | devpriv->command4_bits |= ADC_DIFF_BIT; | |
1274 | devpriv->write_byte(devpriv->command4_bits, dev->iobase + COMMAND4_REG); | |
1275 | ||
1276 | devpriv->write_byte(cmd->chanlist_len, | |
0a85b6f0 | 1277 | dev->iobase + INTERVAL_COUNT_REG); |
f6b49620 | 1278 | /* load count */ |
124b13b2 | 1279 | devpriv->write_byte(INTERVAL_LOAD_BITS, |
0a85b6f0 | 1280 | dev->iobase + INTERVAL_LOAD_REG); |
124b13b2 FMH |
1281 | |
1282 | if (cmd->convert_src == TRIG_TIMER || cmd->scan_begin_src == TRIG_TIMER) { | |
f6b49620 | 1283 | /* set up pacing */ |
124b13b2 | 1284 | labpc_adc_timing(dev, cmd); |
f6b49620 | 1285 | /* load counter b0 in mode 3 */ |
124b13b2 | 1286 | ret = labpc_counter_load(dev, dev->iobase + COUNTER_B_BASE_REG, |
0a85b6f0 | 1287 | 0, devpriv->divisor_b0, 3); |
124b13b2 FMH |
1288 | if (ret < 0) { |
1289 | comedi_error(dev, "error loading counter b0"); | |
1290 | return -1; | |
1291 | } | |
1292 | } | |
f6b49620 | 1293 | /* set up conversion pacing */ |
124b13b2 | 1294 | if (labpc_ai_convert_period(cmd)) { |
f6b49620 | 1295 | /* load counter a0 in mode 2 */ |
124b13b2 | 1296 | ret = labpc_counter_load(dev, dev->iobase + COUNTER_A_BASE_REG, |
0a85b6f0 | 1297 | 0, devpriv->divisor_a0, 2); |
124b13b2 FMH |
1298 | if (ret < 0) { |
1299 | comedi_error(dev, "error loading counter a0"); | |
1300 | return -1; | |
1301 | } | |
1302 | } else | |
1303 | devpriv->write_byte(INIT_A0_BITS, | |
0a85b6f0 | 1304 | dev->iobase + COUNTER_A_CONTROL_REG); |
124b13b2 | 1305 | |
f6b49620 | 1306 | /* set up scan pacing */ |
124b13b2 | 1307 | if (labpc_ai_scan_period(cmd)) { |
f6b49620 | 1308 | /* load counter b1 in mode 2 */ |
124b13b2 | 1309 | ret = labpc_counter_load(dev, dev->iobase + COUNTER_B_BASE_REG, |
0a85b6f0 | 1310 | 1, devpriv->divisor_b1, 2); |
124b13b2 FMH |
1311 | if (ret < 0) { |
1312 | comedi_error(dev, "error loading counter b1"); | |
1313 | return -1; | |
1314 | } | |
1315 | } | |
1316 | ||
1317 | labpc_clear_adc_fifo(dev); | |
1318 | ||
f6b49620 | 1319 | /* set up dma transfer */ |
124b13b2 FMH |
1320 | if (xfer == isa_dma_transfer) { |
1321 | irq_flags = claim_dma_lock(); | |
1322 | disable_dma(devpriv->dma_chan); | |
1323 | /* clear flip-flop to make sure 2-byte registers for | |
1324 | * count and address get set correctly */ | |
1325 | clear_dma_ff(devpriv->dma_chan); | |
1326 | set_dma_addr(devpriv->dma_chan, | |
0a85b6f0 | 1327 | virt_to_bus(devpriv->dma_buffer)); |
f6b49620 | 1328 | /* set appropriate size of transfer */ |
124b13b2 FMH |
1329 | devpriv->dma_transfer_size = labpc_suggest_transfer_size(*cmd); |
1330 | if (cmd->stop_src == TRIG_COUNT && | |
0a85b6f0 | 1331 | devpriv->count * sample_size < devpriv->dma_transfer_size) { |
124b13b2 | 1332 | devpriv->dma_transfer_size = |
0a85b6f0 | 1333 | devpriv->count * sample_size; |
124b13b2 FMH |
1334 | } |
1335 | set_dma_count(devpriv->dma_chan, devpriv->dma_transfer_size); | |
1336 | enable_dma(devpriv->dma_chan); | |
1337 | release_dma_lock(irq_flags); | |
f6b49620 | 1338 | /* enable board's dma */ |
124b13b2 FMH |
1339 | devpriv->command3_bits |= DMA_EN_BIT | DMATC_INTR_EN_BIT; |
1340 | } else | |
1341 | devpriv->command3_bits &= ~DMA_EN_BIT & ~DMATC_INTR_EN_BIT; | |
1342 | ||
f6b49620 | 1343 | /* enable error interrupts */ |
124b13b2 | 1344 | devpriv->command3_bits |= ERR_INTR_EN_BIT; |
f6b49620 | 1345 | /* enable fifo not empty interrupt? */ |
124b13b2 FMH |
1346 | if (xfer == fifo_not_empty_transfer) |
1347 | devpriv->command3_bits |= ADC_FNE_INTR_EN_BIT; | |
1348 | else | |
1349 | devpriv->command3_bits &= ~ADC_FNE_INTR_EN_BIT; | |
1350 | devpriv->write_byte(devpriv->command3_bits, dev->iobase + COMMAND3_REG); | |
1351 | ||
25985edc | 1352 | /* startup acquisition */ |
124b13b2 | 1353 | |
f6b49620 BP |
1354 | /* command2 reg */ |
1355 | /* use 2 cascaded counters for pacing */ | |
5f74ea14 | 1356 | spin_lock_irqsave(&dev->spinlock, flags); |
124b13b2 FMH |
1357 | devpriv->command2_bits |= CASCADE_BIT; |
1358 | switch (cmd->start_src) { | |
1359 | case TRIG_EXT: | |
1360 | devpriv->command2_bits |= HWTRIG_BIT; | |
1361 | devpriv->command2_bits &= ~PRETRIG_BIT & ~SWTRIG_BIT; | |
1362 | break; | |
1363 | case TRIG_NOW: | |
1364 | devpriv->command2_bits |= SWTRIG_BIT; | |
1365 | devpriv->command2_bits &= ~PRETRIG_BIT & ~HWTRIG_BIT; | |
1366 | break; | |
1367 | default: | |
1368 | comedi_error(dev, "bug with start_src"); | |
1369 | return -1; | |
1370 | break; | |
1371 | } | |
1372 | switch (cmd->stop_src) { | |
1373 | case TRIG_EXT: | |
1374 | devpriv->command2_bits |= HWTRIG_BIT | PRETRIG_BIT; | |
1375 | break; | |
1376 | case TRIG_COUNT: | |
1377 | case TRIG_NONE: | |
1378 | break; | |
1379 | default: | |
1380 | comedi_error(dev, "bug with stop_src"); | |
1381 | return -1; | |
1382 | } | |
1383 | devpriv->write_byte(devpriv->command2_bits, dev->iobase + COMMAND2_REG); | |
5f74ea14 | 1384 | spin_unlock_irqrestore(&dev->spinlock, flags); |
124b13b2 FMH |
1385 | |
1386 | return 0; | |
1387 | } | |
1388 | ||
1389 | /* interrupt service routine */ | |
70265d24 | 1390 | static irqreturn_t labpc_interrupt(int irq, void *d) |
124b13b2 | 1391 | { |
71b5f4f1 | 1392 | struct comedi_device *dev = d; |
34c43922 | 1393 | struct comedi_subdevice *s = dev->read_subdev; |
d163679c | 1394 | struct comedi_async *async; |
ea6d0d4c | 1395 | struct comedi_cmd *cmd; |
124b13b2 FMH |
1396 | |
1397 | if (dev->attached == 0) { | |
1398 | comedi_error(dev, "premature interrupt"); | |
1399 | return IRQ_HANDLED; | |
1400 | } | |
1401 | ||
1402 | async = s->async; | |
1403 | cmd = &async->cmd; | |
1404 | async->events = 0; | |
1405 | ||
e41a6f6d | 1406 | /* read board status */ |
124b13b2 FMH |
1407 | devpriv->status1_bits = devpriv->read_byte(dev->iobase + STATUS1_REG); |
1408 | if (thisboard->register_layout == labpc_1200_layout) | |
1409 | devpriv->status2_bits = | |
0a85b6f0 | 1410 | devpriv->read_byte(dev->iobase + STATUS2_REG); |
124b13b2 FMH |
1411 | |
1412 | if ((devpriv->status1_bits & (DMATC_BIT | TIMER_BIT | OVERFLOW_BIT | | |
0a85b6f0 MT |
1413 | OVERRUN_BIT | DATA_AVAIL_BIT)) == 0 |
1414 | && (devpriv->status2_bits & A1_TC_BIT) == 0 | |
1415 | && (devpriv->status2_bits & FNHF_BIT)) { | |
124b13b2 FMH |
1416 | return IRQ_NONE; |
1417 | } | |
1418 | ||
1419 | if (devpriv->status1_bits & OVERRUN_BIT) { | |
e41a6f6d | 1420 | /* clear error interrupt */ |
124b13b2 FMH |
1421 | devpriv->write_byte(0x1, dev->iobase + ADC_CLEAR_REG); |
1422 | async->events |= COMEDI_CB_ERROR | COMEDI_CB_EOA; | |
1423 | comedi_event(dev, s); | |
1424 | comedi_error(dev, "overrun"); | |
1425 | return IRQ_HANDLED; | |
1426 | } | |
1427 | ||
1428 | if (devpriv->current_transfer == isa_dma_transfer) { | |
639b9f1e SR |
1429 | /* |
1430 | * if a dma terminal count of external stop trigger | |
1431 | * has occurred | |
1432 | */ | |
124b13b2 | 1433 | if (devpriv->status1_bits & DMATC_BIT || |
0a85b6f0 MT |
1434 | (thisboard->register_layout == labpc_1200_layout |
1435 | && devpriv->status2_bits & A1_TC_BIT)) { | |
124b13b2 FMH |
1436 | handle_isa_dma(dev); |
1437 | } | |
1438 | } else | |
1439 | labpc_drain_fifo(dev); | |
1440 | ||
1441 | if (devpriv->status1_bits & TIMER_BIT) { | |
1442 | comedi_error(dev, "handled timer interrupt?"); | |
f6b49620 | 1443 | /* clear it */ |
124b13b2 FMH |
1444 | devpriv->write_byte(0x1, dev->iobase + TIMER_CLEAR_REG); |
1445 | } | |
1446 | ||
1447 | if (devpriv->status1_bits & OVERFLOW_BIT) { | |
f6b49620 | 1448 | /* clear error interrupt */ |
124b13b2 FMH |
1449 | devpriv->write_byte(0x1, dev->iobase + ADC_CLEAR_REG); |
1450 | async->events |= COMEDI_CB_ERROR | COMEDI_CB_EOA; | |
1451 | comedi_event(dev, s); | |
1452 | comedi_error(dev, "overflow"); | |
1453 | return IRQ_HANDLED; | |
1454 | } | |
f6b49620 | 1455 | /* handle external stop trigger */ |
124b13b2 FMH |
1456 | if (cmd->stop_src == TRIG_EXT) { |
1457 | if (devpriv->status2_bits & A1_TC_BIT) { | |
1458 | labpc_drain_dregs(dev); | |
1459 | labpc_cancel(dev, s); | |
1460 | async->events |= COMEDI_CB_EOA; | |
1461 | } | |
1462 | } | |
1463 | ||
1464 | /* TRIG_COUNT end of acquisition */ | |
1465 | if (cmd->stop_src == TRIG_COUNT) { | |
1466 | if (devpriv->count == 0) { | |
1467 | labpc_cancel(dev, s); | |
1468 | async->events |= COMEDI_CB_EOA; | |
1469 | } | |
1470 | } | |
1471 | ||
1472 | comedi_event(dev, s); | |
1473 | return IRQ_HANDLED; | |
1474 | } | |
1475 | ||
f6b49620 | 1476 | /* read all available samples from ai fifo */ |
da91b269 | 1477 | static int labpc_drain_fifo(struct comedi_device *dev) |
124b13b2 FMH |
1478 | { |
1479 | unsigned int lsb, msb; | |
790c5541 | 1480 | short data; |
d163679c | 1481 | struct comedi_async *async = dev->read_subdev->async; |
124b13b2 FMH |
1482 | const int timeout = 10000; |
1483 | unsigned int i; | |
1484 | ||
1485 | devpriv->status1_bits = devpriv->read_byte(dev->iobase + STATUS1_REG); | |
1486 | ||
1487 | for (i = 0; (devpriv->status1_bits & DATA_AVAIL_BIT) && i < timeout; | |
0a85b6f0 | 1488 | i++) { |
f6b49620 | 1489 | /* quit if we have all the data we want */ |
124b13b2 FMH |
1490 | if (async->cmd.stop_src == TRIG_COUNT) { |
1491 | if (devpriv->count == 0) | |
1492 | break; | |
1493 | devpriv->count--; | |
1494 | } | |
1495 | lsb = devpriv->read_byte(dev->iobase + ADC_FIFO_REG); | |
1496 | msb = devpriv->read_byte(dev->iobase + ADC_FIFO_REG); | |
1497 | data = (msb << 8) | lsb; | |
1498 | cfc_write_to_buffer(dev->read_subdev, data); | |
1499 | devpriv->status1_bits = | |
0a85b6f0 | 1500 | devpriv->read_byte(dev->iobase + STATUS1_REG); |
124b13b2 FMH |
1501 | } |
1502 | if (i == timeout) { | |
1503 | comedi_error(dev, "ai timeout, fifo never empties"); | |
1504 | async->events |= COMEDI_CB_ERROR | COMEDI_CB_EOA; | |
1505 | return -1; | |
1506 | } | |
1507 | ||
1508 | return 0; | |
1509 | } | |
1510 | ||
da91b269 | 1511 | static void labpc_drain_dma(struct comedi_device *dev) |
124b13b2 | 1512 | { |
34c43922 | 1513 | struct comedi_subdevice *s = dev->read_subdev; |
d163679c | 1514 | struct comedi_async *async = s->async; |
124b13b2 FMH |
1515 | int status; |
1516 | unsigned long flags; | |
1517 | unsigned int max_points, num_points, residue, leftover; | |
1518 | int i; | |
1519 | ||
1520 | status = devpriv->status1_bits; | |
1521 | ||
1522 | flags = claim_dma_lock(); | |
1523 | disable_dma(devpriv->dma_chan); | |
1524 | /* clear flip-flop to make sure 2-byte registers for | |
1525 | * count and address get set correctly */ | |
1526 | clear_dma_ff(devpriv->dma_chan); | |
1527 | ||
f6b49620 | 1528 | /* figure out how many points to read */ |
124b13b2 FMH |
1529 | max_points = devpriv->dma_transfer_size / sample_size; |
1530 | /* residue is the number of points left to be done on the dma | |
1531 | * transfer. It should always be zero at this point unless | |
1532 | * the stop_src is set to external triggering. | |
1533 | */ | |
1534 | residue = get_dma_residue(devpriv->dma_chan) / sample_size; | |
1535 | num_points = max_points - residue; | |
1536 | if (devpriv->count < num_points && async->cmd.stop_src == TRIG_COUNT) | |
1537 | num_points = devpriv->count; | |
1538 | ||
f6b49620 | 1539 | /* figure out how many points will be stored next time */ |
124b13b2 FMH |
1540 | leftover = 0; |
1541 | if (async->cmd.stop_src != TRIG_COUNT) { | |
1542 | leftover = devpriv->dma_transfer_size / sample_size; | |
1543 | } else if (devpriv->count > num_points) { | |
1544 | leftover = devpriv->count - num_points; | |
1545 | if (leftover > max_points) | |
1546 | leftover = max_points; | |
1547 | } | |
1548 | ||
1549 | /* write data to comedi buffer */ | |
412bd046 | 1550 | for (i = 0; i < num_points; i++) |
124b13b2 | 1551 | cfc_write_to_buffer(s, devpriv->dma_buffer[i]); |
65d6d26c | 1552 | |
124b13b2 FMH |
1553 | if (async->cmd.stop_src == TRIG_COUNT) |
1554 | devpriv->count -= num_points; | |
1555 | ||
f6b49620 | 1556 | /* set address and count for next transfer */ |
124b13b2 FMH |
1557 | set_dma_addr(devpriv->dma_chan, virt_to_bus(devpriv->dma_buffer)); |
1558 | set_dma_count(devpriv->dma_chan, leftover * sample_size); | |
1559 | release_dma_lock(flags); | |
1560 | ||
1561 | async->events |= COMEDI_CB_BLOCK; | |
1562 | } | |
1563 | ||
da91b269 | 1564 | static void handle_isa_dma(struct comedi_device *dev) |
124b13b2 FMH |
1565 | { |
1566 | labpc_drain_dma(dev); | |
1567 | ||
1568 | enable_dma(devpriv->dma_chan); | |
1569 | ||
f6b49620 | 1570 | /* clear dma tc interrupt */ |
124b13b2 FMH |
1571 | devpriv->write_byte(0x1, dev->iobase + DMATC_CLEAR_REG); |
1572 | } | |
1573 | ||
25985edc LDM |
1574 | /* makes sure all data acquired by board is transferred to comedi (used |
1575 | * when acquisition is terminated by stop_src == TRIG_EXT). */ | |
da91b269 | 1576 | static void labpc_drain_dregs(struct comedi_device *dev) |
124b13b2 FMH |
1577 | { |
1578 | if (devpriv->current_transfer == isa_dma_transfer) | |
1579 | labpc_drain_dma(dev); | |
1580 | ||
1581 | labpc_drain_fifo(dev); | |
1582 | } | |
1583 | ||
da91b269 | 1584 | static int labpc_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s, |
0a85b6f0 | 1585 | struct comedi_insn *insn, unsigned int *data) |
124b13b2 FMH |
1586 | { |
1587 | int i, n; | |
1588 | int chan, range; | |
1589 | int lsb, msb; | |
1590 | int timeout = 1000; | |
1591 | unsigned long flags; | |
1592 | ||
f6b49620 | 1593 | /* disable timed conversions */ |
5f74ea14 | 1594 | spin_lock_irqsave(&dev->spinlock, flags); |
124b13b2 FMH |
1595 | devpriv->command2_bits &= ~SWTRIG_BIT & ~HWTRIG_BIT & ~PRETRIG_BIT; |
1596 | devpriv->write_byte(devpriv->command2_bits, dev->iobase + COMMAND2_REG); | |
5f74ea14 | 1597 | spin_unlock_irqrestore(&dev->spinlock, flags); |
124b13b2 | 1598 | |
f6b49620 | 1599 | /* disable interrupt generation and dma */ |
124b13b2 FMH |
1600 | devpriv->command3_bits = 0; |
1601 | devpriv->write_byte(devpriv->command3_bits, dev->iobase + COMMAND3_REG); | |
1602 | ||
1603 | /* set gain and channel */ | |
1604 | devpriv->command1_bits = 0; | |
1605 | chan = CR_CHAN(insn->chanspec); | |
1606 | range = CR_RANGE(insn->chanspec); | |
1607 | devpriv->command1_bits |= thisboard->ai_range_code[range]; | |
e41a6f6d | 1608 | /* munge channel bits for differential/scan disabled mode */ |
124b13b2 FMH |
1609 | if (CR_AREF(insn->chanspec) == AREF_DIFF) |
1610 | chan *= 2; | |
1611 | devpriv->command1_bits |= ADC_CHAN_BITS(chan); | |
1612 | devpriv->write_byte(devpriv->command1_bits, dev->iobase + COMMAND1_REG); | |
1613 | ||
e41a6f6d | 1614 | /* setup command6 register for 1200 boards */ |
124b13b2 | 1615 | if (thisboard->register_layout == labpc_1200_layout) { |
f6b49620 | 1616 | /* reference inputs to ground or common? */ |
124b13b2 FMH |
1617 | if (CR_AREF(insn->chanspec) != AREF_GROUND) |
1618 | devpriv->command6_bits |= ADC_COMMON_BIT; | |
1619 | else | |
1620 | devpriv->command6_bits &= ~ADC_COMMON_BIT; | |
e41a6f6d | 1621 | /* bipolar or unipolar range? */ |
124b13b2 FMH |
1622 | if (thisboard->ai_range_is_unipolar[range]) |
1623 | devpriv->command6_bits |= ADC_UNIP_BIT; | |
1624 | else | |
1625 | devpriv->command6_bits &= ~ADC_UNIP_BIT; | |
e41a6f6d | 1626 | /* don't interrupt on fifo half full */ |
124b13b2 | 1627 | devpriv->command6_bits &= ~ADC_FHF_INTR_EN_BIT; |
e41a6f6d | 1628 | /* don't enable interrupt on counter a1 terminal count? */ |
124b13b2 | 1629 | devpriv->command6_bits &= ~A1_INTR_EN_BIT; |
e41a6f6d | 1630 | /* write to register */ |
124b13b2 | 1631 | devpriv->write_byte(devpriv->command6_bits, |
0a85b6f0 | 1632 | dev->iobase + COMMAND6_REG); |
124b13b2 | 1633 | } |
e41a6f6d | 1634 | /* setup command4 register */ |
124b13b2 FMH |
1635 | devpriv->command4_bits = 0; |
1636 | devpriv->command4_bits |= EXT_CONVERT_DISABLE_BIT; | |
e41a6f6d | 1637 | /* single-ended/differential */ |
124b13b2 FMH |
1638 | if (CR_AREF(insn->chanspec) == AREF_DIFF) |
1639 | devpriv->command4_bits |= ADC_DIFF_BIT; | |
1640 | devpriv->write_byte(devpriv->command4_bits, dev->iobase + COMMAND4_REG); | |
1641 | ||
1309e617 MD |
1642 | /* |
1643 | * initialize pacer counter output to make sure it doesn't | |
1644 | * cause any problems | |
1645 | */ | |
124b13b2 FMH |
1646 | devpriv->write_byte(INIT_A0_BITS, dev->iobase + COUNTER_A_CONTROL_REG); |
1647 | ||
1648 | labpc_clear_adc_fifo(dev); | |
1649 | ||
1650 | for (n = 0; n < insn->n; n++) { | |
1651 | /* trigger conversion */ | |
1652 | devpriv->write_byte(0x1, dev->iobase + ADC_CONVERT_REG); | |
1653 | ||
1654 | for (i = 0; i < timeout; i++) { | |
1655 | if (devpriv->read_byte(dev->iobase + | |
0a85b6f0 | 1656 | STATUS1_REG) & DATA_AVAIL_BIT) |
124b13b2 | 1657 | break; |
5f74ea14 | 1658 | udelay(1); |
124b13b2 FMH |
1659 | } |
1660 | if (i == timeout) { | |
1661 | comedi_error(dev, "timeout"); | |
1662 | return -ETIME; | |
1663 | } | |
1664 | lsb = devpriv->read_byte(dev->iobase + ADC_FIFO_REG); | |
1665 | msb = devpriv->read_byte(dev->iobase + ADC_FIFO_REG); | |
1666 | data[n] = (msb << 8) | lsb; | |
1667 | } | |
1668 | ||
1669 | return n; | |
1670 | } | |
1671 | ||
f6b49620 | 1672 | /* analog output insn */ |
da91b269 | 1673 | static int labpc_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s, |
0a85b6f0 | 1674 | struct comedi_insn *insn, unsigned int *data) |
124b13b2 FMH |
1675 | { |
1676 | int channel, range; | |
1677 | unsigned long flags; | |
1678 | int lsb, msb; | |
1679 | ||
1680 | channel = CR_CHAN(insn->chanspec); | |
1681 | ||
e41a6f6d | 1682 | /* turn off pacing of analog output channel */ |
124b13b2 FMH |
1683 | /* note: hardware bug in daqcard-1200 means pacing cannot |
1684 | * be independently enabled/disabled for its the two channels */ | |
5f74ea14 | 1685 | spin_lock_irqsave(&dev->spinlock, flags); |
124b13b2 FMH |
1686 | devpriv->command2_bits &= ~DAC_PACED_BIT(channel); |
1687 | devpriv->write_byte(devpriv->command2_bits, dev->iobase + COMMAND2_REG); | |
5f74ea14 | 1688 | spin_unlock_irqrestore(&dev->spinlock, flags); |
124b13b2 | 1689 | |
e41a6f6d | 1690 | /* set range */ |
124b13b2 FMH |
1691 | if (thisboard->register_layout == labpc_1200_layout) { |
1692 | range = CR_RANGE(insn->chanspec); | |
1693 | if (range & AO_RANGE_IS_UNIPOLAR) | |
1694 | devpriv->command6_bits |= DAC_UNIP_BIT(channel); | |
1695 | else | |
1696 | devpriv->command6_bits &= ~DAC_UNIP_BIT(channel); | |
f6b49620 | 1697 | /* write to register */ |
124b13b2 | 1698 | devpriv->write_byte(devpriv->command6_bits, |
0a85b6f0 | 1699 | dev->iobase + COMMAND6_REG); |
124b13b2 | 1700 | } |
e41a6f6d | 1701 | /* send data */ |
124b13b2 FMH |
1702 | lsb = data[0] & 0xff; |
1703 | msb = (data[0] >> 8) & 0xff; | |
1704 | devpriv->write_byte(lsb, dev->iobase + DAC_LSB_REG(channel)); | |
1705 | devpriv->write_byte(msb, dev->iobase + DAC_MSB_REG(channel)); | |
1706 | ||
e41a6f6d | 1707 | /* remember value for readback */ |
124b13b2 FMH |
1708 | devpriv->ao_value[channel] = data[0]; |
1709 | ||
1710 | return 1; | |
1711 | } | |
1712 | ||
f6b49620 | 1713 | /* analog output readback insn */ |
da91b269 | 1714 | static int labpc_ao_rinsn(struct comedi_device *dev, struct comedi_subdevice *s, |
0a85b6f0 | 1715 | struct comedi_insn *insn, unsigned int *data) |
124b13b2 FMH |
1716 | { |
1717 | data[0] = devpriv->ao_value[CR_CHAN(insn->chanspec)]; | |
1718 | ||
1719 | return 1; | |
1720 | } | |
1721 | ||
0a85b6f0 MT |
1722 | static int labpc_calib_read_insn(struct comedi_device *dev, |
1723 | struct comedi_subdevice *s, | |
1724 | struct comedi_insn *insn, unsigned int *data) | |
124b13b2 FMH |
1725 | { |
1726 | data[0] = devpriv->caldac[CR_CHAN(insn->chanspec)]; | |
1727 | ||
1728 | return 1; | |
1729 | } | |
1730 | ||
0a85b6f0 MT |
1731 | static int labpc_calib_write_insn(struct comedi_device *dev, |
1732 | struct comedi_subdevice *s, | |
1733 | struct comedi_insn *insn, unsigned int *data) | |
124b13b2 FMH |
1734 | { |
1735 | int channel = CR_CHAN(insn->chanspec); | |
1736 | ||
1737 | write_caldac(dev, channel, data[0]); | |
1738 | return 1; | |
1739 | } | |
1740 | ||
0a85b6f0 MT |
1741 | static int labpc_eeprom_read_insn(struct comedi_device *dev, |
1742 | struct comedi_subdevice *s, | |
1743 | struct comedi_insn *insn, unsigned int *data) | |
124b13b2 FMH |
1744 | { |
1745 | data[0] = devpriv->eeprom_data[CR_CHAN(insn->chanspec)]; | |
1746 | ||
1747 | return 1; | |
1748 | } | |
1749 | ||
0a85b6f0 MT |
1750 | static int labpc_eeprom_write_insn(struct comedi_device *dev, |
1751 | struct comedi_subdevice *s, | |
1752 | struct comedi_insn *insn, unsigned int *data) | |
124b13b2 FMH |
1753 | { |
1754 | int channel = CR_CHAN(insn->chanspec); | |
1755 | int ret; | |
1756 | ||
f6b49620 | 1757 | /* only allow writes to user area of eeprom */ |
124b13b2 | 1758 | if (channel < 16 || channel > 127) { |
0a85b6f0 MT |
1759 | printk |
1760 | ("eeprom writes are only allowed to channels 16 through 127 (the pointer and user areas)"); | |
124b13b2 FMH |
1761 | return -EINVAL; |
1762 | } | |
1763 | ||
1764 | ret = labpc_eeprom_write(dev, channel, data[0]); | |
1765 | if (ret < 0) | |
1766 | return ret; | |
1767 | ||
1768 | return 1; | |
1769 | } | |
1770 | ||
f6b49620 | 1771 | /* utility function that suggests a dma transfer size in bytes */ |
ea6d0d4c | 1772 | static unsigned int labpc_suggest_transfer_size(struct comedi_cmd cmd) |
124b13b2 FMH |
1773 | { |
1774 | unsigned int size; | |
1775 | unsigned int freq; | |
1776 | ||
1777 | if (cmd.convert_src == TRIG_TIMER) | |
1778 | freq = 1000000000 / cmd.convert_arg; | |
e41a6f6d | 1779 | /* return some default value */ |
124b13b2 FMH |
1780 | else |
1781 | freq = 0xffffffff; | |
1782 | ||
e41a6f6d | 1783 | /* make buffer fill in no more than 1/3 second */ |
124b13b2 FMH |
1784 | size = (freq / 3) * sample_size; |
1785 | ||
e41a6f6d | 1786 | /* set a minimum and maximum size allowed */ |
124b13b2 FMH |
1787 | if (size > dma_buffer_size) |
1788 | size = dma_buffer_size - dma_buffer_size % sample_size; | |
1789 | else if (size < sample_size) | |
1790 | size = sample_size; | |
1791 | ||
1792 | return size; | |
1793 | } | |
1794 | ||
f6b49620 | 1795 | /* figures out what counter values to use based on command */ |
da91b269 | 1796 | static void labpc_adc_timing(struct comedi_device *dev, struct comedi_cmd *cmd) |
124b13b2 | 1797 | { |
e41a6f6d SR |
1798 | /* max value for 16 bit counter in mode 2 */ |
1799 | const int max_counter_value = 0x10000; | |
1800 | /* min value for 16 bit counter in mode 2 */ | |
1801 | const int min_counter_value = 2; | |
124b13b2 FMH |
1802 | unsigned int base_period; |
1803 | ||
e41a6f6d SR |
1804 | /* |
1805 | * if both convert and scan triggers are TRIG_TIMER, then they | |
1806 | * both rely on counter b0 | |
1807 | */ | |
124b13b2 | 1808 | if (labpc_ai_convert_period(cmd) && labpc_ai_scan_period(cmd)) { |
e41a6f6d SR |
1809 | /* |
1810 | * pick the lowest b0 divisor value we can (for maximum input | |
1811 | * clock speed on convert and scan counters) | |
1812 | */ | |
124b13b2 | 1813 | devpriv->divisor_b0 = (labpc_ai_scan_period(cmd) - 1) / |
0a85b6f0 | 1814 | (LABPC_TIMER_BASE * max_counter_value) + 1; |
124b13b2 FMH |
1815 | if (devpriv->divisor_b0 < min_counter_value) |
1816 | devpriv->divisor_b0 = min_counter_value; | |
1817 | if (devpriv->divisor_b0 > max_counter_value) | |
1818 | devpriv->divisor_b0 = max_counter_value; | |
1819 | ||
1820 | base_period = LABPC_TIMER_BASE * devpriv->divisor_b0; | |
1821 | ||
f6b49620 | 1822 | /* set a0 for conversion frequency and b1 for scan frequency */ |
124b13b2 FMH |
1823 | switch (cmd->flags & TRIG_ROUND_MASK) { |
1824 | default: | |
1825 | case TRIG_ROUND_NEAREST: | |
1826 | devpriv->divisor_a0 = | |
0a85b6f0 MT |
1827 | (labpc_ai_convert_period(cmd) + |
1828 | (base_period / 2)) / base_period; | |
124b13b2 | 1829 | devpriv->divisor_b1 = |
0a85b6f0 MT |
1830 | (labpc_ai_scan_period(cmd) + |
1831 | (base_period / 2)) / base_period; | |
124b13b2 FMH |
1832 | break; |
1833 | case TRIG_ROUND_UP: | |
1834 | devpriv->divisor_a0 = | |
0a85b6f0 MT |
1835 | (labpc_ai_convert_period(cmd) + (base_period - |
1836 | 1)) / base_period; | |
124b13b2 | 1837 | devpriv->divisor_b1 = |
0a85b6f0 MT |
1838 | (labpc_ai_scan_period(cmd) + (base_period - |
1839 | 1)) / base_period; | |
124b13b2 FMH |
1840 | break; |
1841 | case TRIG_ROUND_DOWN: | |
1842 | devpriv->divisor_a0 = | |
0a85b6f0 | 1843 | labpc_ai_convert_period(cmd) / base_period; |
124b13b2 | 1844 | devpriv->divisor_b1 = |
0a85b6f0 | 1845 | labpc_ai_scan_period(cmd) / base_period; |
124b13b2 FMH |
1846 | break; |
1847 | } | |
f6b49620 | 1848 | /* make sure a0 and b1 values are acceptable */ |
124b13b2 FMH |
1849 | if (devpriv->divisor_a0 < min_counter_value) |
1850 | devpriv->divisor_a0 = min_counter_value; | |
1851 | if (devpriv->divisor_a0 > max_counter_value) | |
1852 | devpriv->divisor_a0 = max_counter_value; | |
1853 | if (devpriv->divisor_b1 < min_counter_value) | |
1854 | devpriv->divisor_b1 = min_counter_value; | |
1855 | if (devpriv->divisor_b1 > max_counter_value) | |
1856 | devpriv->divisor_b1 = max_counter_value; | |
f6b49620 | 1857 | /* write corrected timings to command */ |
124b13b2 | 1858 | labpc_set_ai_convert_period(cmd, |
0a85b6f0 | 1859 | base_period * devpriv->divisor_a0); |
124b13b2 | 1860 | labpc_set_ai_scan_period(cmd, |
0a85b6f0 | 1861 | base_period * devpriv->divisor_b1); |
e41a6f6d SR |
1862 | /* |
1863 | * if only one TRIG_TIMER is used, we can employ the generic | |
1864 | * cascaded timing functions | |
1865 | */ | |
124b13b2 FMH |
1866 | } else if (labpc_ai_scan_period(cmd)) { |
1867 | unsigned int scan_period; | |
1868 | ||
1869 | scan_period = labpc_ai_scan_period(cmd); | |
1309e617 MD |
1870 | /* |
1871 | * calculate cascaded counter values | |
1872 | * that give desired scan timing | |
1873 | */ | |
124b13b2 | 1874 | i8253_cascade_ns_to_timer_2div(LABPC_TIMER_BASE, |
0a85b6f0 MT |
1875 | &(devpriv->divisor_b1), |
1876 | &(devpriv->divisor_b0), | |
1877 | &scan_period, | |
1878 | cmd->flags & TRIG_ROUND_MASK); | |
124b13b2 FMH |
1879 | labpc_set_ai_scan_period(cmd, scan_period); |
1880 | } else if (labpc_ai_convert_period(cmd)) { | |
1881 | unsigned int convert_period; | |
1882 | ||
1883 | convert_period = labpc_ai_convert_period(cmd); | |
1309e617 MD |
1884 | /* |
1885 | * calculate cascaded counter values | |
1886 | * that give desired conversion timing | |
1887 | */ | |
124b13b2 | 1888 | i8253_cascade_ns_to_timer_2div(LABPC_TIMER_BASE, |
0a85b6f0 MT |
1889 | &(devpriv->divisor_a0), |
1890 | &(devpriv->divisor_b0), | |
1891 | &convert_period, | |
1892 | cmd->flags & TRIG_ROUND_MASK); | |
124b13b2 FMH |
1893 | labpc_set_ai_convert_period(cmd, convert_period); |
1894 | } | |
1895 | } | |
1896 | ||
1897 | static int labpc_dio_mem_callback(int dir, int port, int data, | |
0a85b6f0 | 1898 | unsigned long iobase) |
124b13b2 FMH |
1899 | { |
1900 | if (dir) { | |
1901 | writeb(data, (void *)(iobase + port)); | |
1902 | return 0; | |
1903 | } else { | |
1904 | return readb((void *)(iobase + port)); | |
1905 | } | |
1906 | } | |
1907 | ||
f6b49620 | 1908 | /* lowlevel write to eeprom/dac */ |
da91b269 | 1909 | static void labpc_serial_out(struct comedi_device *dev, unsigned int value, |
0a85b6f0 | 1910 | unsigned int value_width) |
124b13b2 FMH |
1911 | { |
1912 | int i; | |
1913 | ||
1914 | for (i = 1; i <= value_width; i++) { | |
f6b49620 | 1915 | /* clear serial clock */ |
124b13b2 | 1916 | devpriv->command5_bits &= ~SCLOCK_BIT; |
f6b49620 | 1917 | /* send bits most significant bit first */ |
124b13b2 FMH |
1918 | if (value & (1 << (value_width - i))) |
1919 | devpriv->command5_bits |= SDATA_BIT; | |
1920 | else | |
1921 | devpriv->command5_bits &= ~SDATA_BIT; | |
5f74ea14 | 1922 | udelay(1); |
124b13b2 | 1923 | devpriv->write_byte(devpriv->command5_bits, |
0a85b6f0 | 1924 | dev->iobase + COMMAND5_REG); |
f6b49620 | 1925 | /* set clock to load bit */ |
124b13b2 | 1926 | devpriv->command5_bits |= SCLOCK_BIT; |
5f74ea14 | 1927 | udelay(1); |
124b13b2 | 1928 | devpriv->write_byte(devpriv->command5_bits, |
0a85b6f0 | 1929 | dev->iobase + COMMAND5_REG); |
124b13b2 FMH |
1930 | } |
1931 | } | |
1932 | ||
f6b49620 | 1933 | /* lowlevel read from eeprom */ |
da91b269 | 1934 | static unsigned int labpc_serial_in(struct comedi_device *dev) |
124b13b2 FMH |
1935 | { |
1936 | unsigned int value = 0; | |
1937 | int i; | |
f6b49620 | 1938 | const int value_width = 8; /* number of bits wide values are */ |
124b13b2 FMH |
1939 | |
1940 | for (i = 1; i <= value_width; i++) { | |
f6b49620 | 1941 | /* set serial clock */ |
124b13b2 | 1942 | devpriv->command5_bits |= SCLOCK_BIT; |
5f74ea14 | 1943 | udelay(1); |
124b13b2 | 1944 | devpriv->write_byte(devpriv->command5_bits, |
0a85b6f0 | 1945 | dev->iobase + COMMAND5_REG); |
f6b49620 | 1946 | /* clear clock bit */ |
124b13b2 | 1947 | devpriv->command5_bits &= ~SCLOCK_BIT; |
5f74ea14 | 1948 | udelay(1); |
124b13b2 | 1949 | devpriv->write_byte(devpriv->command5_bits, |
0a85b6f0 | 1950 | dev->iobase + COMMAND5_REG); |
f6b49620 | 1951 | /* read bits most significant bit first */ |
5f74ea14 | 1952 | udelay(1); |
124b13b2 | 1953 | devpriv->status2_bits = |
0a85b6f0 | 1954 | devpriv->read_byte(dev->iobase + STATUS2_REG); |
412bd046 | 1955 | if (devpriv->status2_bits & EEPROM_OUT_BIT) |
124b13b2 | 1956 | value |= 1 << (value_width - i); |
124b13b2 FMH |
1957 | } |
1958 | ||
1959 | return value; | |
1960 | } | |
1961 | ||
0a85b6f0 MT |
1962 | static unsigned int labpc_eeprom_read(struct comedi_device *dev, |
1963 | unsigned int address) | |
124b13b2 FMH |
1964 | { |
1965 | unsigned int value; | |
e41a6f6d SR |
1966 | /* bits to tell eeprom to expect a read */ |
1967 | const int read_instruction = 0x3; | |
1968 | /* 8 bit write lengths to eeprom */ | |
1969 | const int write_length = 8; | |
124b13b2 | 1970 | |
f6b49620 | 1971 | /* enable read/write to eeprom */ |
124b13b2 | 1972 | devpriv->command5_bits &= ~EEPROM_EN_BIT; |
5f74ea14 | 1973 | udelay(1); |
124b13b2 FMH |
1974 | devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); |
1975 | devpriv->command5_bits |= EEPROM_EN_BIT | EEPROM_WRITE_UNPROTECT_BIT; | |
5f74ea14 | 1976 | udelay(1); |
124b13b2 FMH |
1977 | devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); |
1978 | ||
f6b49620 | 1979 | /* send read instruction */ |
124b13b2 | 1980 | labpc_serial_out(dev, read_instruction, write_length); |
f6b49620 | 1981 | /* send 8 bit address to read from */ |
124b13b2 | 1982 | labpc_serial_out(dev, address, write_length); |
f6b49620 | 1983 | /* read result */ |
124b13b2 FMH |
1984 | value = labpc_serial_in(dev); |
1985 | ||
f6b49620 | 1986 | /* disable read/write to eeprom */ |
124b13b2 | 1987 | devpriv->command5_bits &= ~EEPROM_EN_BIT & ~EEPROM_WRITE_UNPROTECT_BIT; |
5f74ea14 | 1988 | udelay(1); |
124b13b2 FMH |
1989 | devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); |
1990 | ||
1991 | return value; | |
1992 | } | |
1993 | ||
d6269644 JL |
1994 | static int labpc_eeprom_write(struct comedi_device *dev, |
1995 | unsigned int address, unsigned int value) | |
124b13b2 FMH |
1996 | { |
1997 | const int write_enable_instruction = 0x6; | |
1998 | const int write_instruction = 0x2; | |
f6b49620 | 1999 | const int write_length = 8; /* 8 bit write lengths to eeprom */ |
124b13b2 FMH |
2000 | const int write_in_progress_bit = 0x1; |
2001 | const int timeout = 10000; | |
2002 | int i; | |
2003 | ||
f6b49620 | 2004 | /* make sure there isn't already a write in progress */ |
124b13b2 FMH |
2005 | for (i = 0; i < timeout; i++) { |
2006 | if ((labpc_eeprom_read_status(dev) & write_in_progress_bit) == | |
0a85b6f0 | 2007 | 0) |
124b13b2 FMH |
2008 | break; |
2009 | } | |
2010 | if (i == timeout) { | |
2011 | comedi_error(dev, "eeprom write timed out"); | |
2012 | return -ETIME; | |
2013 | } | |
f6b49620 | 2014 | /* update software copy of eeprom */ |
124b13b2 FMH |
2015 | devpriv->eeprom_data[address] = value; |
2016 | ||
f6b49620 | 2017 | /* enable read/write to eeprom */ |
124b13b2 | 2018 | devpriv->command5_bits &= ~EEPROM_EN_BIT; |
5f74ea14 | 2019 | udelay(1); |
124b13b2 FMH |
2020 | devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); |
2021 | devpriv->command5_bits |= EEPROM_EN_BIT | EEPROM_WRITE_UNPROTECT_BIT; | |
5f74ea14 | 2022 | udelay(1); |
124b13b2 FMH |
2023 | devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); |
2024 | ||
f6b49620 | 2025 | /* send write_enable instruction */ |
124b13b2 FMH |
2026 | labpc_serial_out(dev, write_enable_instruction, write_length); |
2027 | devpriv->command5_bits &= ~EEPROM_EN_BIT; | |
5f74ea14 | 2028 | udelay(1); |
124b13b2 FMH |
2029 | devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); |
2030 | ||
f6b49620 | 2031 | /* send write instruction */ |
124b13b2 | 2032 | devpriv->command5_bits |= EEPROM_EN_BIT; |
5f74ea14 | 2033 | udelay(1); |
124b13b2 FMH |
2034 | devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); |
2035 | labpc_serial_out(dev, write_instruction, write_length); | |
f6b49620 | 2036 | /* send 8 bit address to write to */ |
124b13b2 | 2037 | labpc_serial_out(dev, address, write_length); |
f6b49620 | 2038 | /* write value */ |
124b13b2 FMH |
2039 | labpc_serial_out(dev, value, write_length); |
2040 | devpriv->command5_bits &= ~EEPROM_EN_BIT; | |
5f74ea14 | 2041 | udelay(1); |
124b13b2 FMH |
2042 | devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); |
2043 | ||
f6b49620 | 2044 | /* disable read/write to eeprom */ |
124b13b2 | 2045 | devpriv->command5_bits &= ~EEPROM_EN_BIT & ~EEPROM_WRITE_UNPROTECT_BIT; |
5f74ea14 | 2046 | udelay(1); |
124b13b2 FMH |
2047 | devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); |
2048 | ||
2049 | return 0; | |
2050 | } | |
2051 | ||
da91b269 | 2052 | static unsigned int labpc_eeprom_read_status(struct comedi_device *dev) |
124b13b2 FMH |
2053 | { |
2054 | unsigned int value; | |
2055 | const int read_status_instruction = 0x5; | |
f6b49620 | 2056 | const int write_length = 8; /* 8 bit write lengths to eeprom */ |
124b13b2 | 2057 | |
f6b49620 | 2058 | /* enable read/write to eeprom */ |
124b13b2 | 2059 | devpriv->command5_bits &= ~EEPROM_EN_BIT; |
5f74ea14 | 2060 | udelay(1); |
124b13b2 FMH |
2061 | devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); |
2062 | devpriv->command5_bits |= EEPROM_EN_BIT | EEPROM_WRITE_UNPROTECT_BIT; | |
5f74ea14 | 2063 | udelay(1); |
124b13b2 FMH |
2064 | devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); |
2065 | ||
f6b49620 | 2066 | /* send read status instruction */ |
124b13b2 | 2067 | labpc_serial_out(dev, read_status_instruction, write_length); |
f6b49620 | 2068 | /* read result */ |
124b13b2 FMH |
2069 | value = labpc_serial_in(dev); |
2070 | ||
f6b49620 | 2071 | /* disable read/write to eeprom */ |
124b13b2 | 2072 | devpriv->command5_bits &= ~EEPROM_EN_BIT & ~EEPROM_WRITE_UNPROTECT_BIT; |
5f74ea14 | 2073 | udelay(1); |
124b13b2 FMH |
2074 | devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); |
2075 | ||
2076 | return value; | |
2077 | } | |
2078 | ||
f6b49620 | 2079 | /* writes to 8 bit calibration dacs */ |
da91b269 | 2080 | static void write_caldac(struct comedi_device *dev, unsigned int channel, |
0a85b6f0 | 2081 | unsigned int value) |
124b13b2 FMH |
2082 | { |
2083 | if (value == devpriv->caldac[channel]) | |
2084 | return; | |
2085 | devpriv->caldac[channel] = value; | |
2086 | ||
f6b49620 | 2087 | /* clear caldac load bit and make sure we don't write to eeprom */ |
124b13b2 | 2088 | devpriv->command5_bits &= |
0a85b6f0 | 2089 | ~CALDAC_LOAD_BIT & ~EEPROM_EN_BIT & ~EEPROM_WRITE_UNPROTECT_BIT; |
5f74ea14 | 2090 | udelay(1); |
124b13b2 FMH |
2091 | devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); |
2092 | ||
f6b49620 | 2093 | /* write 4 bit channel */ |
124b13b2 | 2094 | labpc_serial_out(dev, channel, 4); |
f6b49620 | 2095 | /* write 8 bit caldac value */ |
124b13b2 FMH |
2096 | labpc_serial_out(dev, value, 8); |
2097 | ||
f6b49620 | 2098 | /* set and clear caldac bit to load caldac value */ |
124b13b2 | 2099 | devpriv->command5_bits |= CALDAC_LOAD_BIT; |
5f74ea14 | 2100 | udelay(1); |
124b13b2 FMH |
2101 | devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); |
2102 | devpriv->command5_bits &= ~CALDAC_LOAD_BIT; | |
5f74ea14 | 2103 | udelay(1); |
124b13b2 FMH |
2104 | devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); |
2105 | } | |
2106 | ||
2107 | #ifdef CONFIG_COMEDI_PCI | |
727b286b AT |
2108 | static int __devinit driver_labpc_pci_probe(struct pci_dev *dev, |
2109 | const struct pci_device_id *ent) | |
2110 | { | |
2111 | return comedi_pci_auto_config(dev, driver_labpc.driver_name); | |
2112 | } | |
2113 | ||
2114 | static void __devexit driver_labpc_pci_remove(struct pci_dev *dev) | |
2115 | { | |
2116 | comedi_pci_auto_unconfig(dev); | |
2117 | } | |
2118 | ||
2119 | static struct pci_driver driver_labpc_pci_driver = { | |
2120 | .id_table = labpc_pci_table, | |
2121 | .probe = &driver_labpc_pci_probe, | |
2122 | .remove = __devexit_p(&driver_labpc_pci_remove) | |
2123 | }; | |
2124 | ||
2125 | static int __init driver_labpc_init_module(void) | |
2126 | { | |
2127 | int retval; | |
2128 | ||
2129 | retval = comedi_driver_register(&driver_labpc); | |
2130 | if (retval < 0) | |
2131 | return retval; | |
2132 | ||
2133 | driver_labpc_pci_driver.name = (char *)driver_labpc.driver_name; | |
2134 | return pci_register_driver(&driver_labpc_pci_driver); | |
2135 | } | |
2136 | ||
2137 | static void __exit driver_labpc_cleanup_module(void) | |
2138 | { | |
2139 | pci_unregister_driver(&driver_labpc_pci_driver); | |
2140 | comedi_driver_unregister(&driver_labpc); | |
2141 | } | |
2142 | ||
2143 | module_init(driver_labpc_init_module); | |
2144 | module_exit(driver_labpc_cleanup_module); | |
124b13b2 | 2145 | #else |
7114a280 AT |
2146 | static int __init driver_labpc_init_module(void) |
2147 | { | |
2148 | return comedi_driver_register(&driver_labpc); | |
2149 | } | |
2150 | ||
2151 | static void __exit driver_labpc_cleanup_module(void) | |
2152 | { | |
2153 | comedi_driver_unregister(&driver_labpc); | |
2154 | } | |
2155 | ||
2156 | module_init(driver_labpc_init_module); | |
2157 | module_exit(driver_labpc_cleanup_module); | |
124b13b2 FMH |
2158 | #endif |
2159 | ||
90f703d3 AT |
2160 | |
2161 | MODULE_AUTHOR("Comedi http://www.comedi.org"); | |
2162 | MODULE_DESCRIPTION("Comedi low-level driver"); | |
2163 | MODULE_LICENSE("GPL"); |