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[deliverable/linux.git] / drivers / staging / comedi / drivers / adl_pci9118.c
1 /*
2 * comedi/drivers/adl_pci9118.c
3 *
4 * hardware driver for ADLink cards:
5 * card: PCI-9118DG, PCI-9118HG, PCI-9118HR
6 * driver: pci9118dg, pci9118hg, pci9118hr
7 *
8 * Author: Michal Dobes <dobes@tesnet.cz>
9 *
10 */
11
12 /*
13 * Driver: adl_pci9118
14 * Description: Adlink PCI-9118DG, PCI-9118HG, PCI-9118HR
15 * Author: Michal Dobes <dobes@tesnet.cz>
16 * Devices: [ADLink] PCI-9118DG (pci9118dg), PCI-9118HG (pci9118hg),
17 * PCI-9118HR (pci9118hr)
18 * Status: works
19 *
20 * This driver supports AI, AO, DI and DO subdevices.
21 * AI subdevice supports cmd and insn interface,
22 * other subdevices support only insn interface.
23 * For AI:
24 * - If cmd->scan_begin_src=TRIG_EXT then trigger input is TGIN (pin 46).
25 * - If cmd->convert_src=TRIG_EXT then trigger input is EXTTRG (pin 44).
26 * - If cmd->start_src/stop_src=TRIG_EXT then trigger input is TGIN (pin 46).
27 * - It is not necessary to have cmd.scan_end_arg=cmd.chanlist_len but
28 * cmd.scan_end_arg modulo cmd.chanlist_len must by 0.
29 * - If return value of cmdtest is 5 then you've bad channel list
30 * (it isn't possible mixture S.E. and DIFF inputs or bipolar and unipolar
31 * ranges).
32 *
33 * There are some hardware limitations:
34 * a) You cann't use mixture of unipolar/bipoar ranges or differencial/single
35 * ended inputs.
36 * b) DMA transfers must have the length aligned to two samples (32 bit),
37 * so there is some problems if cmd->chanlist_len is odd. This driver tries
38 * bypass this with adding one sample to the end of the every scan and discard
39 * it on output but this can't be used if cmd->scan_begin_src=TRIG_FOLLOW
40 * and is used flag CMDF_WAKE_EOS, then driver switch to interrupt driven mode
41 * with interrupt after every sample.
42 * c) If isn't used DMA then you can use only mode where
43 * cmd->scan_begin_src=TRIG_FOLLOW.
44 *
45 * Configuration options:
46 * [0] - PCI bus of device (optional)
47 * [1] - PCI slot of device (optional)
48 * If bus/slot is not specified, then first available PCI
49 * card will be used.
50 * [2] - 0= standard 8 DIFF/16 SE channels configuration
51 * n = external multiplexer connected, 1 <= n <= 256
52 * [3] - ignored
53 * [4] - sample&hold signal - card can generate signal for external S&H board
54 * 0 = use SSHO(pin 45) signal is generated in onboard hardware S&H logic
55 * 0 != use ADCHN7(pin 23) signal is generated from driver, number say how
56 * long delay is requested in ns and sign polarity of the hold
57 * (in this case external multiplexor can serve only 128 channels)
58 * [5] - ignored
59 */
60
61 /*
62 * FIXME
63 *
64 * All the supported boards have the same PCI vendor and device IDs, so
65 * auto-attachment of PCI devices will always find the first board type.
66 *
67 * Perhaps the boards have different subdevice IDs that we could use to
68 * distinguish them?
69 *
70 * Need some device attributes so the board type can be corrected after
71 * attachment if necessary, and possibly to set other options supported by
72 * manual attachment.
73 */
74
75 #include <linux/module.h>
76 #include <linux/delay.h>
77 #include <linux/gfp.h>
78 #include <linux/interrupt.h>
79 #include <linux/io.h>
80
81 #include "../comedi_pci.h"
82
83 #include "amcc_s5933.h"
84 #include "comedi_8254.h"
85
86 /*
87 * PCI BAR2 Register map (dev->iobase)
88 */
89 #define PCI9118_TIMER_BASE 0x00
90 #define PCI9118_AI_FIFO_REG 0x10
91 #define PCI9118_AO_REG(x) (0x10 + ((x) * 4))
92 #define PCI9118_AI_STATUS_REG 0x18
93 #define PCI9118_AI_STATUS_NFULL BIT(8) /* 0=FIFO full (fatal) */
94 #define PCI9118_AI_STATUS_NHFULL BIT(7) /* 0=FIFO half full */
95 #define PCI9118_AI_STATUS_NEPTY BIT(6) /* 0=FIFO empty */
96 #define PCI9118_AI_STATUS_ACMP BIT(5) /* 1=about trigger complete */
97 #define PCI9118_AI_STATUS_DTH BIT(4) /* 1=ext. digital trigger */
98 #define PCI9118_AI_STATUS_BOVER BIT(3) /* 1=burst overrun (fatal) */
99 #define PCI9118_AI_STATUS_ADOS BIT(2) /* 1=A/D over speed (warn) */
100 #define PCI9118_AI_STATUS_ADOR BIT(1) /* 1=A/D overrun (fatal) */
101 #define PCI9118_AI_STATUS_ADRDY BIT(0) /* 1=A/D ready */
102 #define PCI9118_AI_CTRL_REG 0x18
103 #define PCI9118_AI_CTRL_UNIP BIT(7) /* 1=unipolar */
104 #define PCI9118_AI_CTRL_DIFF BIT(6) /* 1=differential inputs */
105 #define PCI9118_AI_CTRL_SOFTG BIT(5) /* 1=8254 software gate */
106 #define PCI9118_AI_CTRL_EXTG BIT(4) /* 1=8254 TGIN(pin 46) gate */
107 #define PCI9118_AI_CTRL_EXTM BIT(3) /* 1=ext. trigger (pin 44) */
108 #define PCI9118_AI_CTRL_TMRTR BIT(2) /* 1=8254 is trigger source */
109 #define PCI9118_AI_CTRL_INT BIT(1) /* 1=enable interrupt */
110 #define PCI9118_AI_CTRL_DMA BIT(0) /* 1=enable DMA */
111 #define PCI9118_DIO_REG 0x1c
112 #define PCI9118_SOFTTRG_REG 0x20
113 #define PCI9118_AI_CHANLIST_REG 0x24
114 #define PCI9118_AI_CHANLIST_RANGE(x) (((x) & 0x3) << 8)
115 #define PCI9118_AI_CHANLIST_CHAN(x) ((x) << 0)
116 #define PCI9118_AI_BURST_NUM_REG 0x28
117 #define PCI9118_AI_AUTOSCAN_MODE_REG 0x2c
118 #define PCI9118_AI_CFG_REG 0x30
119 #define PCI9118_AI_CFG_PDTRG BIT(7) /* 1=positive trigger */
120 #define PCI9118_AI_CFG_PETRG BIT(6) /* 1=positive ext. trigger */
121 #define PCI9118_AI_CFG_BSSH BIT(5) /* 1=with sample & hold */
122 #define PCI9118_AI_CFG_BM BIT(4) /* 1=burst mode */
123 #define PCI9118_AI_CFG_BS BIT(3) /* 1=burst mode start */
124 #define PCI9118_AI_CFG_PM BIT(2) /* 1=post trigger */
125 #define PCI9118_AI_CFG_AM BIT(1) /* 1=about trigger */
126 #define PCI9118_AI_CFG_START BIT(0) /* 1=trigger start */
127 #define PCI9118_FIFO_RESET_REG 0x34
128 #define PCI9118_INT_CTRL_REG 0x38
129 #define PCI9118_INT_CTRL_TIMER BIT(3) /* timer interrupt */
130 #define PCI9118_INT_CTRL_ABOUT BIT(2) /* about trigger complete */
131 #define PCI9118_INT_CTRL_HFULL BIT(1) /* A/D FIFO half full */
132 #define PCI9118_INT_CTRL_DTRG BIT(0) /* ext. digital trigger */
133
134 #define START_AI_EXT 0x01 /* start measure on external trigger */
135 #define STOP_AI_EXT 0x02 /* stop measure on external trigger */
136 #define STOP_AI_INT 0x08 /* stop measure on internal trigger */
137
138 static const struct comedi_lrange pci9118_ai_range = {
139 8, {
140 BIP_RANGE(5),
141 BIP_RANGE(2.5),
142 BIP_RANGE(1.25),
143 BIP_RANGE(0.625),
144 UNI_RANGE(10),
145 UNI_RANGE(5),
146 UNI_RANGE(2.5),
147 UNI_RANGE(1.25)
148 }
149 };
150
151 static const struct comedi_lrange pci9118hg_ai_range = {
152 8, {
153 BIP_RANGE(5),
154 BIP_RANGE(0.5),
155 BIP_RANGE(0.05),
156 BIP_RANGE(0.005),
157 UNI_RANGE(10),
158 UNI_RANGE(1),
159 UNI_RANGE(0.1),
160 UNI_RANGE(0.01)
161 }
162 };
163
164 enum pci9118_boardid {
165 BOARD_PCI9118DG,
166 BOARD_PCI9118HG,
167 BOARD_PCI9118HR,
168 };
169
170 struct pci9118_boardinfo {
171 const char *name;
172 unsigned int ai_is_16bit:1;
173 unsigned int is_hg:1;
174 };
175
176 static const struct pci9118_boardinfo pci9118_boards[] = {
177 [BOARD_PCI9118DG] = {
178 .name = "pci9118dg",
179 },
180 [BOARD_PCI9118HG] = {
181 .name = "pci9118hg",
182 .is_hg = 1,
183 },
184 [BOARD_PCI9118HR] = {
185 .name = "pci9118hr",
186 .ai_is_16bit = 1,
187 },
188 };
189
190 struct pci9118_dmabuf {
191 unsigned short *virt; /* virtual address of buffer */
192 dma_addr_t hw; /* hardware (bus) address of buffer */
193 unsigned int size; /* size of dma buffer in bytes */
194 unsigned int use_size; /* which size we may now use for transfer */
195 };
196
197 struct pci9118_private {
198 unsigned long iobase_a; /* base+size for AMCC chip */
199 unsigned int master:1;
200 unsigned int dma_doublebuf:1;
201 unsigned int ai_neverending:1;
202 unsigned int usedma:1;
203 unsigned int usemux:1;
204 unsigned char ai_ctrl;
205 unsigned char int_ctrl;
206 unsigned char ai_cfg;
207 unsigned int ai_do; /* what do AI? 0=nothing, 1 to 4 mode */
208 unsigned int ai_n_realscanlen; /*
209 * what we must transfer for one
210 * outgoing scan include front/back adds
211 */
212 unsigned int ai_act_dmapos; /* position in actual real stream */
213 unsigned int ai_add_front; /*
214 * how many channels we must add
215 * before scan to satisfy S&H?
216 */
217 unsigned int ai_add_back; /*
218 * how many channels we must add
219 * before scan to satisfy DMA?
220 */
221 unsigned int ai_flags;
222 char ai12_startstop; /*
223 * measure can start/stop
224 * on external trigger
225 */
226 unsigned int dma_actbuf; /* which buffer is used now */
227 struct pci9118_dmabuf dmabuf[2];
228 int softsshdelay; /*
229 * >0 use software S&H,
230 * numer is requested delay in ns
231 */
232 unsigned char softsshsample; /*
233 * polarity of S&H signal
234 * in sample state
235 */
236 unsigned char softsshhold; /*
237 * polarity of S&H signal
238 * in hold state
239 */
240 unsigned int ai_ns_min;
241 };
242
243 static void pci9118_amcc_setup_dma(struct comedi_device *dev, unsigned int buf)
244 {
245 struct pci9118_private *devpriv = dev->private;
246 struct pci9118_dmabuf *dmabuf = &devpriv->dmabuf[buf];
247
248 /* set the master write address and transfer count */
249 outl(dmabuf->hw, devpriv->iobase_a + AMCC_OP_REG_MWAR);
250 outl(dmabuf->use_size, devpriv->iobase_a + AMCC_OP_REG_MWTC);
251 }
252
253 static void pci9118_amcc_dma_ena(struct comedi_device *dev, bool enable)
254 {
255 struct pci9118_private *devpriv = dev->private;
256 unsigned int mcsr;
257
258 mcsr = inl(devpriv->iobase_a + AMCC_OP_REG_MCSR);
259 if (enable)
260 mcsr |= RESET_A2P_FLAGS | A2P_HI_PRIORITY | EN_A2P_TRANSFERS;
261 else
262 mcsr &= ~EN_A2P_TRANSFERS;
263 outl(mcsr, devpriv->iobase_a + AMCC_OP_REG_MCSR);
264 }
265
266 static void pci9118_amcc_int_ena(struct comedi_device *dev, bool enable)
267 {
268 struct pci9118_private *devpriv = dev->private;
269 unsigned int intcsr;
270
271 /* enable/disable interrupt for AMCC Incoming Mailbox 4 (32-bit) */
272 intcsr = inl(devpriv->iobase_a + AMCC_OP_REG_INTCSR);
273 if (enable)
274 intcsr |= 0x1f00;
275 else
276 intcsr &= ~0x1f00;
277 outl(intcsr, devpriv->iobase_a + AMCC_OP_REG_INTCSR);
278 }
279
280 static void pci9118_ai_reset_fifo(struct comedi_device *dev)
281 {
282 /* writing any value resets the A/D FIFO */
283 outl(0, dev->iobase + PCI9118_FIFO_RESET_REG);
284 }
285
286 static int pci9118_ai_check_chanlist(struct comedi_device *dev,
287 struct comedi_subdevice *s,
288 struct comedi_cmd *cmd)
289 {
290 struct pci9118_private *devpriv = dev->private;
291 unsigned int range0 = CR_RANGE(cmd->chanlist[0]);
292 unsigned int aref0 = CR_AREF(cmd->chanlist[0]);
293 int i;
294
295 /* single channel scans are always ok */
296 if (cmd->chanlist_len == 1)
297 return 0;
298
299 for (i = 1; i < cmd->chanlist_len; i++) {
300 unsigned int chan = CR_CHAN(cmd->chanlist[i]);
301 unsigned int range = CR_RANGE(cmd->chanlist[i]);
302 unsigned int aref = CR_AREF(cmd->chanlist[i]);
303
304 if (aref != aref0) {
305 dev_err(dev->class_dev,
306 "Differential and single ended inputs can't be mixed!\n");
307 return -EINVAL;
308 }
309 if (comedi_range_is_bipolar(s, range) !=
310 comedi_range_is_bipolar(s, range0)) {
311 dev_err(dev->class_dev,
312 "Bipolar and unipolar ranges can't be mixed!\n");
313 return -EINVAL;
314 }
315 if (!devpriv->usemux && aref == AREF_DIFF &&
316 (chan >= (s->n_chan / 2))) {
317 dev_err(dev->class_dev,
318 "AREF_DIFF is only available for the first 8 channels!\n");
319 return -EINVAL;
320 }
321 }
322
323 return 0;
324 }
325
326 static void pci9118_set_chanlist(struct comedi_device *dev,
327 struct comedi_subdevice *s,
328 int n_chan, unsigned int *chanlist,
329 int frontadd, int backadd)
330 {
331 struct pci9118_private *devpriv = dev->private;
332 unsigned int chan0 = CR_CHAN(chanlist[0]);
333 unsigned int range0 = CR_RANGE(chanlist[0]);
334 unsigned int aref0 = CR_AREF(chanlist[0]);
335 unsigned int ssh = 0x00;
336 unsigned int val;
337 int i;
338
339 /*
340 * Configure analog input based on the first chanlist entry.
341 * All entries are either unipolar or bipolar and single-ended
342 * or differential.
343 */
344 devpriv->ai_ctrl = 0;
345 if (comedi_range_is_unipolar(s, range0))
346 devpriv->ai_ctrl |= PCI9118_AI_CTRL_UNIP;
347 if (aref0 == AREF_DIFF)
348 devpriv->ai_ctrl |= PCI9118_AI_CTRL_DIFF;
349 outl(devpriv->ai_ctrl, dev->iobase + PCI9118_AI_CTRL_REG);
350
351 /* gods know why this sequence! */
352 outl(2, dev->iobase + PCI9118_AI_AUTOSCAN_MODE_REG);
353 outl(0, dev->iobase + PCI9118_AI_AUTOSCAN_MODE_REG);
354 outl(1, dev->iobase + PCI9118_AI_AUTOSCAN_MODE_REG);
355
356 /* insert channels for S&H */
357 if (frontadd) {
358 val = PCI9118_AI_CHANLIST_CHAN(chan0) |
359 PCI9118_AI_CHANLIST_RANGE(range0);
360 ssh = devpriv->softsshsample;
361 for (i = 0; i < frontadd; i++) {
362 outl(val | ssh, dev->iobase + PCI9118_AI_CHANLIST_REG);
363 ssh = devpriv->softsshhold;
364 }
365 }
366
367 /* store chanlist */
368 for (i = 0; i < n_chan; i++) {
369 unsigned int chan = CR_CHAN(chanlist[i]);
370 unsigned int range = CR_RANGE(chanlist[i]);
371
372 val = PCI9118_AI_CHANLIST_CHAN(chan) |
373 PCI9118_AI_CHANLIST_RANGE(range);
374 outl(val | ssh, dev->iobase + PCI9118_AI_CHANLIST_REG);
375 }
376
377 /* insert channels to fit onto 32bit DMA */
378 if (backadd) {
379 val = PCI9118_AI_CHANLIST_CHAN(chan0) |
380 PCI9118_AI_CHANLIST_RANGE(range0);
381 for (i = 0; i < backadd; i++)
382 outl(val | ssh, dev->iobase + PCI9118_AI_CHANLIST_REG);
383 }
384 /* close scan queue */
385 outl(0, dev->iobase + PCI9118_AI_AUTOSCAN_MODE_REG);
386 /* udelay(100); important delay, or first sample will be crippled */
387 }
388
389 static void pci9118_ai_mode4_switch(struct comedi_device *dev,
390 unsigned int next_buf)
391 {
392 struct pci9118_private *devpriv = dev->private;
393 struct pci9118_dmabuf *dmabuf = &devpriv->dmabuf[next_buf];
394
395 devpriv->ai_cfg = PCI9118_AI_CFG_PDTRG | PCI9118_AI_CFG_PETRG |
396 PCI9118_AI_CFG_AM;
397 outl(devpriv->ai_cfg, dev->iobase + PCI9118_AI_CFG_REG);
398 comedi_8254_load(dev->pacer, 0, dmabuf->hw >> 1,
399 I8254_MODE0 | I8254_BINARY);
400 devpriv->ai_cfg |= PCI9118_AI_CFG_START;
401 outl(devpriv->ai_cfg, dev->iobase + PCI9118_AI_CFG_REG);
402 }
403
404 static unsigned int pci9118_ai_samples_ready(struct comedi_device *dev,
405 struct comedi_subdevice *s,
406 unsigned int n_raw_samples)
407 {
408 struct pci9118_private *devpriv = dev->private;
409 struct comedi_cmd *cmd = &s->async->cmd;
410 unsigned int start_pos = devpriv->ai_add_front;
411 unsigned int stop_pos = start_pos + cmd->chanlist_len;
412 unsigned int span_len = stop_pos + devpriv->ai_add_back;
413 unsigned int dma_pos = devpriv->ai_act_dmapos;
414 unsigned int whole_spans, n_samples, x;
415
416 if (span_len == cmd->chanlist_len)
417 return n_raw_samples; /* use all samples */
418
419 /*
420 * Not all samples are to be used. Buffer contents consist of a
421 * possibly non-whole number of spans and a region of each span
422 * is to be used.
423 *
424 * Account for samples in whole number of spans.
425 */
426 whole_spans = n_raw_samples / span_len;
427 n_samples = whole_spans * cmd->chanlist_len;
428 n_raw_samples -= whole_spans * span_len;
429
430 /*
431 * Deal with remaining samples which could overlap up to two spans.
432 */
433 while (n_raw_samples) {
434 if (dma_pos < start_pos) {
435 /* Skip samples before start position. */
436 x = start_pos - dma_pos;
437 if (x > n_raw_samples)
438 x = n_raw_samples;
439 dma_pos += x;
440 n_raw_samples -= x;
441 if (!n_raw_samples)
442 break;
443 }
444 if (dma_pos < stop_pos) {
445 /* Include samples before stop position. */
446 x = stop_pos - dma_pos;
447 if (x > n_raw_samples)
448 x = n_raw_samples;
449 n_samples += x;
450 dma_pos += x;
451 n_raw_samples -= x;
452 }
453 /* Advance to next span. */
454 start_pos += span_len;
455 stop_pos += span_len;
456 }
457 return n_samples;
458 }
459
460 static void pci9118_ai_dma_xfer(struct comedi_device *dev,
461 struct comedi_subdevice *s,
462 unsigned short *dma_buffer,
463 unsigned int n_raw_samples)
464 {
465 struct pci9118_private *devpriv = dev->private;
466 struct comedi_cmd *cmd = &s->async->cmd;
467 unsigned int start_pos = devpriv->ai_add_front;
468 unsigned int stop_pos = start_pos + cmd->chanlist_len;
469 unsigned int span_len = stop_pos + devpriv->ai_add_back;
470 unsigned int dma_pos = devpriv->ai_act_dmapos;
471 unsigned int x;
472
473 if (span_len == cmd->chanlist_len) {
474 /* All samples are to be copied. */
475 comedi_buf_write_samples(s, dma_buffer, n_raw_samples);
476 dma_pos += n_raw_samples;
477 } else {
478 /*
479 * Not all samples are to be copied. Buffer contents consist
480 * of a possibly non-whole number of spans and a region of
481 * each span is to be copied.
482 */
483 while (n_raw_samples) {
484 if (dma_pos < start_pos) {
485 /* Skip samples before start position. */
486 x = start_pos - dma_pos;
487 if (x > n_raw_samples)
488 x = n_raw_samples;
489 dma_pos += x;
490 n_raw_samples -= x;
491 if (!n_raw_samples)
492 break;
493 }
494 if (dma_pos < stop_pos) {
495 /* Copy samples before stop position. */
496 x = stop_pos - dma_pos;
497 if (x > n_raw_samples)
498 x = n_raw_samples;
499 comedi_buf_write_samples(s, dma_buffer, x);
500 dma_pos += x;
501 n_raw_samples -= x;
502 }
503 /* Advance to next span. */
504 start_pos += span_len;
505 stop_pos += span_len;
506 }
507 }
508 /* Update position in span for next time. */
509 devpriv->ai_act_dmapos = dma_pos % span_len;
510 }
511
512 static void pci9118_exttrg_enable(struct comedi_device *dev, bool enable)
513 {
514 struct pci9118_private *devpriv = dev->private;
515
516 if (enable)
517 devpriv->int_ctrl |= PCI9118_INT_CTRL_DTRG;
518 else
519 devpriv->int_ctrl &= ~PCI9118_INT_CTRL_DTRG;
520 outl(devpriv->int_ctrl, dev->iobase + PCI9118_INT_CTRL_REG);
521
522 if (devpriv->int_ctrl)
523 pci9118_amcc_int_ena(dev, true);
524 else
525 pci9118_amcc_int_ena(dev, false);
526 }
527
528 static void pci9118_calc_divisors(struct comedi_device *dev,
529 struct comedi_subdevice *s,
530 unsigned int *tim1, unsigned int *tim2,
531 unsigned int flags, int chans,
532 unsigned int *div1, unsigned int *div2,
533 unsigned int chnsshfront)
534 {
535 struct comedi_8254 *pacer = dev->pacer;
536 struct comedi_cmd *cmd = &s->async->cmd;
537
538 *div1 = *tim2 / pacer->osc_base; /* convert timer (burst) */
539 *div2 = *tim1 / pacer->osc_base; /* scan timer */
540 *div2 = *div2 / *div1; /* major timer is c1*c2 */
541 if (*div2 < chans)
542 *div2 = chans;
543
544 *tim2 = *div1 * pacer->osc_base; /* real convert timer */
545
546 if (cmd->convert_src == TRIG_NOW && !chnsshfront) {
547 /* use BSSH signal */
548 if (*div2 < (chans + 2))
549 *div2 = chans + 2;
550 }
551
552 *tim1 = *div1 * *div2 * pacer->osc_base;
553 }
554
555 static void pci9118_start_pacer(struct comedi_device *dev, int mode)
556 {
557 if (mode == 1 || mode == 2 || mode == 4)
558 comedi_8254_pacer_enable(dev->pacer, 1, 2, true);
559 }
560
561 static int pci9118_ai_cancel(struct comedi_device *dev,
562 struct comedi_subdevice *s)
563 {
564 struct pci9118_private *devpriv = dev->private;
565
566 if (devpriv->usedma)
567 pci9118_amcc_dma_ena(dev, false);
568 pci9118_exttrg_enable(dev, false);
569 comedi_8254_pacer_enable(dev->pacer, 1, 2, false);
570 /* set default config (disable burst and triggers) */
571 devpriv->ai_cfg = PCI9118_AI_CFG_PDTRG | PCI9118_AI_CFG_PETRG;
572 outl(devpriv->ai_cfg, dev->iobase + PCI9118_AI_CFG_REG);
573 /* reset acqusition control */
574 devpriv->ai_ctrl = 0;
575 outl(devpriv->ai_ctrl, dev->iobase + PCI9118_AI_CTRL_REG);
576 outl(0, dev->iobase + PCI9118_AI_BURST_NUM_REG);
577 /* reset scan queue */
578 outl(1, dev->iobase + PCI9118_AI_AUTOSCAN_MODE_REG);
579 outl(2, dev->iobase + PCI9118_AI_AUTOSCAN_MODE_REG);
580 pci9118_ai_reset_fifo(dev);
581
582 devpriv->int_ctrl = 0;
583 outl(devpriv->int_ctrl, dev->iobase + PCI9118_INT_CTRL_REG);
584 pci9118_amcc_int_ena(dev, false);
585
586 devpriv->ai_do = 0;
587 devpriv->usedma = 0;
588
589 devpriv->ai_act_dmapos = 0;
590 s->async->inttrig = NULL;
591 devpriv->ai_neverending = 0;
592 devpriv->dma_actbuf = 0;
593
594 return 0;
595 }
596
597 static void pci9118_ai_munge(struct comedi_device *dev,
598 struct comedi_subdevice *s, void *data,
599 unsigned int num_bytes,
600 unsigned int start_chan_index)
601 {
602 struct pci9118_private *devpriv = dev->private;
603 unsigned short *array = data;
604 unsigned int num_samples = comedi_bytes_to_samples(s, num_bytes);
605 unsigned int i;
606
607 for (i = 0; i < num_samples; i++) {
608 if (devpriv->usedma)
609 array[i] = be16_to_cpu(array[i]);
610 if (s->maxdata == 0xffff)
611 array[i] ^= 0x8000;
612 else
613 array[i] = (array[i] >> 4) & 0x0fff;
614 }
615 }
616
617 static void pci9118_ai_get_onesample(struct comedi_device *dev,
618 struct comedi_subdevice *s)
619 {
620 struct pci9118_private *devpriv = dev->private;
621 struct comedi_cmd *cmd = &s->async->cmd;
622 unsigned short sampl;
623
624 sampl = inl(dev->iobase + PCI9118_AI_FIFO_REG);
625
626 comedi_buf_write_samples(s, &sampl, 1);
627
628 if (!devpriv->ai_neverending) {
629 if (s->async->scans_done >= cmd->stop_arg)
630 s->async->events |= COMEDI_CB_EOA;
631 }
632 }
633
634 static void pci9118_ai_get_dma(struct comedi_device *dev,
635 struct comedi_subdevice *s)
636 {
637 struct pci9118_private *devpriv = dev->private;
638 struct comedi_cmd *cmd = &s->async->cmd;
639 struct pci9118_dmabuf *dmabuf = &devpriv->dmabuf[devpriv->dma_actbuf];
640 unsigned int n_all = comedi_bytes_to_samples(s, dmabuf->use_size);
641 unsigned int n_valid;
642 bool more_dma;
643
644 /* determine whether more DMA buffers to do after this one */
645 n_valid = pci9118_ai_samples_ready(dev, s, n_all);
646 more_dma = n_valid < comedi_nsamples_left(s, n_valid + 1);
647
648 /* switch DMA buffers and restart DMA if double buffering */
649 if (more_dma && devpriv->dma_doublebuf) {
650 devpriv->dma_actbuf = 1 - devpriv->dma_actbuf;
651 pci9118_amcc_setup_dma(dev, devpriv->dma_actbuf);
652 if (devpriv->ai_do == 4)
653 pci9118_ai_mode4_switch(dev, devpriv->dma_actbuf);
654 }
655
656 if (n_all)
657 pci9118_ai_dma_xfer(dev, s, dmabuf->virt, n_all);
658
659 if (!devpriv->ai_neverending) {
660 if (s->async->scans_done >= cmd->stop_arg)
661 s->async->events |= COMEDI_CB_EOA;
662 }
663
664 if (s->async->events & COMEDI_CB_CANCEL_MASK)
665 more_dma = false;
666
667 /* restart DMA if not double buffering */
668 if (more_dma && !devpriv->dma_doublebuf) {
669 pci9118_amcc_setup_dma(dev, 0);
670 if (devpriv->ai_do == 4)
671 pci9118_ai_mode4_switch(dev, 0);
672 }
673 }
674
675 static irqreturn_t pci9118_interrupt(int irq, void *d)
676 {
677 struct comedi_device *dev = d;
678 struct comedi_subdevice *s = dev->read_subdev;
679 struct pci9118_private *devpriv = dev->private;
680 unsigned int intsrc; /* IRQ reasons from card */
681 unsigned int intcsr; /* INT register from AMCC chip */
682 unsigned int adstat; /* STATUS register */
683
684 if (!dev->attached)
685 return IRQ_NONE;
686
687 intsrc = inl(dev->iobase + PCI9118_INT_CTRL_REG) & 0xf;
688 intcsr = inl(devpriv->iobase_a + AMCC_OP_REG_INTCSR);
689
690 if (!intsrc && !(intcsr & ANY_S593X_INT))
691 return IRQ_NONE;
692
693 outl(intcsr | 0x00ff0000, devpriv->iobase_a + AMCC_OP_REG_INTCSR);
694
695 if (intcsr & MASTER_ABORT_INT) {
696 dev_err(dev->class_dev, "AMCC IRQ - MASTER DMA ABORT!\n");
697 s->async->events |= COMEDI_CB_ERROR;
698 goto interrupt_exit;
699 }
700
701 if (intcsr & TARGET_ABORT_INT) {
702 dev_err(dev->class_dev, "AMCC IRQ - TARGET DMA ABORT!\n");
703 s->async->events |= COMEDI_CB_ERROR;
704 goto interrupt_exit;
705 }
706
707 adstat = inl(dev->iobase + PCI9118_AI_STATUS_REG);
708 if ((adstat & PCI9118_AI_STATUS_NFULL) == 0) {
709 dev_err(dev->class_dev,
710 "A/D FIFO Full status (Fatal Error!)\n");
711 s->async->events |= COMEDI_CB_ERROR | COMEDI_CB_OVERFLOW;
712 goto interrupt_exit;
713 }
714 if (adstat & PCI9118_AI_STATUS_BOVER) {
715 dev_err(dev->class_dev,
716 "A/D Burst Mode Overrun Status (Fatal Error!)\n");
717 s->async->events |= COMEDI_CB_ERROR | COMEDI_CB_OVERFLOW;
718 goto interrupt_exit;
719 }
720 if (adstat & PCI9118_AI_STATUS_ADOS) {
721 dev_err(dev->class_dev, "A/D Over Speed Status (Warning!)\n");
722 s->async->events |= COMEDI_CB_ERROR;
723 goto interrupt_exit;
724 }
725 if (adstat & PCI9118_AI_STATUS_ADOR) {
726 dev_err(dev->class_dev, "A/D Overrun Status (Fatal Error!)\n");
727 s->async->events |= COMEDI_CB_ERROR | COMEDI_CB_OVERFLOW;
728 goto interrupt_exit;
729 }
730
731 if (!devpriv->ai_do)
732 return IRQ_HANDLED;
733
734 if (devpriv->ai12_startstop) {
735 if ((adstat & PCI9118_AI_STATUS_DTH) &&
736 (intsrc & PCI9118_INT_CTRL_DTRG)) {
737 /* start/stop of measure */
738 if (devpriv->ai12_startstop & START_AI_EXT) {
739 /* deactivate EXT trigger */
740 devpriv->ai12_startstop &= ~START_AI_EXT;
741 if (!(devpriv->ai12_startstop & STOP_AI_EXT))
742 pci9118_exttrg_enable(dev, false);
743
744 /* start pacer */
745 pci9118_start_pacer(dev, devpriv->ai_do);
746 outl(devpriv->ai_ctrl,
747 dev->iobase + PCI9118_AI_CTRL_REG);
748 } else if (devpriv->ai12_startstop & STOP_AI_EXT) {
749 /* deactivate EXT trigger */
750 devpriv->ai12_startstop &= ~STOP_AI_EXT;
751 pci9118_exttrg_enable(dev, false);
752
753 /* on next interrupt measure will stop */
754 devpriv->ai_neverending = 0;
755 }
756 }
757 }
758
759 if (devpriv->usedma)
760 pci9118_ai_get_dma(dev, s);
761 else
762 pci9118_ai_get_onesample(dev, s);
763
764 interrupt_exit:
765 comedi_handle_events(dev, s);
766 return IRQ_HANDLED;
767 }
768
769 static void pci9118_ai_cmd_start(struct comedi_device *dev)
770 {
771 struct pci9118_private *devpriv = dev->private;
772
773 outl(devpriv->int_ctrl, dev->iobase + PCI9118_INT_CTRL_REG);
774 outl(devpriv->ai_cfg, dev->iobase + PCI9118_AI_CFG_REG);
775 if (devpriv->ai_do != 3) {
776 pci9118_start_pacer(dev, devpriv->ai_do);
777 devpriv->ai_ctrl |= PCI9118_AI_CTRL_SOFTG;
778 }
779 outl(devpriv->ai_ctrl, dev->iobase + PCI9118_AI_CTRL_REG);
780 }
781
782 static int pci9118_ai_inttrig(struct comedi_device *dev,
783 struct comedi_subdevice *s,
784 unsigned int trig_num)
785 {
786 struct comedi_cmd *cmd = &s->async->cmd;
787
788 if (trig_num != cmd->start_arg)
789 return -EINVAL;
790
791 s->async->inttrig = NULL;
792 pci9118_ai_cmd_start(dev);
793
794 return 1;
795 }
796
797 static int pci9118_ai_setup_dma(struct comedi_device *dev,
798 struct comedi_subdevice *s)
799 {
800 struct pci9118_private *devpriv = dev->private;
801 struct comedi_cmd *cmd = &s->async->cmd;
802 struct pci9118_dmabuf *dmabuf0 = &devpriv->dmabuf[0];
803 struct pci9118_dmabuf *dmabuf1 = &devpriv->dmabuf[1];
804 unsigned int dmalen0 = dmabuf0->size;
805 unsigned int dmalen1 = dmabuf1->size;
806 unsigned int scan_bytes = devpriv->ai_n_realscanlen *
807 comedi_bytes_per_sample(s);
808
809 /* isn't output buff smaller that our DMA buff? */
810 if (dmalen0 > s->async->prealloc_bufsz) {
811 /* align to 32bit down */
812 dmalen0 = s->async->prealloc_bufsz & ~3L;
813 }
814 if (dmalen1 > s->async->prealloc_bufsz) {
815 /* align to 32bit down */
816 dmalen1 = s->async->prealloc_bufsz & ~3L;
817 }
818
819 /* we want wake up every scan? */
820 if (devpriv->ai_flags & CMDF_WAKE_EOS) {
821 if (dmalen0 < scan_bytes) {
822 /* uff, too short DMA buffer, disable EOS support! */
823 devpriv->ai_flags &= (~CMDF_WAKE_EOS);
824 dev_info(dev->class_dev,
825 "WAR: DMA0 buf too short, can't support CMDF_WAKE_EOS (%d<%d)\n",
826 dmalen0, scan_bytes);
827 } else {
828 /* short first DMA buffer to one scan */
829 dmalen0 = scan_bytes;
830 if (dmalen0 < 4) {
831 dev_info(dev->class_dev,
832 "ERR: DMA0 buf len bug? (%d<4)\n",
833 dmalen0);
834 dmalen0 = 4;
835 }
836 }
837 }
838 if (devpriv->ai_flags & CMDF_WAKE_EOS) {
839 if (dmalen1 < scan_bytes) {
840 /* uff, too short DMA buffer, disable EOS support! */
841 devpriv->ai_flags &= (~CMDF_WAKE_EOS);
842 dev_info(dev->class_dev,
843 "WAR: DMA1 buf too short, can't support CMDF_WAKE_EOS (%d<%d)\n",
844 dmalen1, scan_bytes);
845 } else {
846 /* short second DMA buffer to one scan */
847 dmalen1 = scan_bytes;
848 if (dmalen1 < 4) {
849 dev_info(dev->class_dev,
850 "ERR: DMA1 buf len bug? (%d<4)\n",
851 dmalen1);
852 dmalen1 = 4;
853 }
854 }
855 }
856
857 /* transfer without CMDF_WAKE_EOS */
858 if (!(devpriv->ai_flags & CMDF_WAKE_EOS)) {
859 unsigned int tmp;
860
861 /* if it's possible then align DMA buffers to length of scan */
862 tmp = dmalen0;
863 dmalen0 = (dmalen0 / scan_bytes) * scan_bytes;
864 dmalen0 &= ~3L;
865 if (!dmalen0)
866 dmalen0 = tmp; /* uff. very long scan? */
867 tmp = dmalen1;
868 dmalen1 = (dmalen1 / scan_bytes) * scan_bytes;
869 dmalen1 &= ~3L;
870 if (!dmalen1)
871 dmalen1 = tmp; /* uff. very long scan? */
872 /*
873 * if measure isn't neverending then test, if it fits whole
874 * into one or two DMA buffers
875 */
876 if (!devpriv->ai_neverending) {
877 unsigned long long scanlen;
878
879 scanlen = (unsigned long long)scan_bytes *
880 cmd->stop_arg;
881
882 /* fits whole measure into one DMA buffer? */
883 if (dmalen0 > scanlen) {
884 dmalen0 = scanlen;
885 dmalen0 &= ~3L;
886 } else {
887 /* fits whole measure into two DMA buffer? */
888 if (dmalen1 > (scanlen - dmalen0)) {
889 dmalen1 = scanlen - dmalen0;
890 dmalen1 &= ~3L;
891 }
892 }
893 }
894 }
895
896 /* these DMA buffer size will be used */
897 devpriv->dma_actbuf = 0;
898 dmabuf0->use_size = dmalen0;
899 dmabuf1->use_size = dmalen1;
900
901 pci9118_amcc_dma_ena(dev, false);
902 pci9118_amcc_setup_dma(dev, 0);
903 /* init DMA transfer */
904 outl(0x00000000 | AINT_WRITE_COMPL,
905 devpriv->iobase_a + AMCC_OP_REG_INTCSR);
906 /* outl(0x02000000|AINT_WRITE_COMPL, devpriv->iobase_a+AMCC_OP_REG_INTCSR); */
907 pci9118_amcc_dma_ena(dev, true);
908 outl(inl(devpriv->iobase_a + AMCC_OP_REG_INTCSR) | EN_A2P_TRANSFERS,
909 devpriv->iobase_a + AMCC_OP_REG_INTCSR);
910 /* allow bus mastering */
911
912 return 0;
913 }
914
915 static int pci9118_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
916 {
917 struct pci9118_private *devpriv = dev->private;
918 struct comedi_8254 *pacer = dev->pacer;
919 struct comedi_cmd *cmd = &s->async->cmd;
920 unsigned int addchans = 0;
921 unsigned int scanlen;
922
923 devpriv->ai12_startstop = 0;
924 devpriv->ai_flags = cmd->flags;
925 devpriv->ai_add_front = 0;
926 devpriv->ai_add_back = 0;
927
928 /* prepare for start/stop conditions */
929 if (cmd->start_src == TRIG_EXT)
930 devpriv->ai12_startstop |= START_AI_EXT;
931 if (cmd->stop_src == TRIG_EXT) {
932 devpriv->ai_neverending = 1;
933 devpriv->ai12_startstop |= STOP_AI_EXT;
934 }
935 if (cmd->stop_src == TRIG_NONE)
936 devpriv->ai_neverending = 1;
937 if (cmd->stop_src == TRIG_COUNT)
938 devpriv->ai_neverending = 0;
939
940 /*
941 * use additional sample at end of every scan
942 * to satisty DMA 32 bit transfer?
943 */
944 devpriv->ai_add_front = 0;
945 devpriv->ai_add_back = 0;
946 if (devpriv->master) {
947 devpriv->usedma = 1;
948 if ((cmd->flags & CMDF_WAKE_EOS) &&
949 (cmd->scan_end_arg == 1)) {
950 if (cmd->convert_src == TRIG_NOW)
951 devpriv->ai_add_back = 1;
952 if (cmd->convert_src == TRIG_TIMER) {
953 devpriv->usedma = 0;
954 /*
955 * use INT transfer if scanlist
956 * have only one channel
957 */
958 }
959 }
960 if ((cmd->flags & CMDF_WAKE_EOS) &&
961 (cmd->scan_end_arg & 1) &&
962 (cmd->scan_end_arg > 1)) {
963 if (cmd->scan_begin_src == TRIG_FOLLOW) {
964 devpriv->usedma = 0;
965 /*
966 * XXX maybe can be corrected to use 16 bit DMA
967 */
968 } else { /*
969 * well, we must insert one sample
970 * to end of EOS to meet 32 bit transfer
971 */
972 devpriv->ai_add_back = 1;
973 }
974 }
975 } else { /* interrupt transfer don't need any correction */
976 devpriv->usedma = 0;
977 }
978
979 /*
980 * we need software S&H signal?
981 * It adds two samples before every scan as minimum
982 */
983 if (cmd->convert_src == TRIG_NOW && devpriv->softsshdelay) {
984 devpriv->ai_add_front = 2;
985 if ((devpriv->usedma == 1) && (devpriv->ai_add_back == 1)) {
986 /* move it to front */
987 devpriv->ai_add_front++;
988 devpriv->ai_add_back = 0;
989 }
990 if (cmd->convert_arg < devpriv->ai_ns_min)
991 cmd->convert_arg = devpriv->ai_ns_min;
992 addchans = devpriv->softsshdelay / cmd->convert_arg;
993 if (devpriv->softsshdelay % cmd->convert_arg)
994 addchans++;
995 if (addchans > (devpriv->ai_add_front - 1)) {
996 /* uff, still short */
997 devpriv->ai_add_front = addchans + 1;
998 if (devpriv->usedma == 1)
999 if ((devpriv->ai_add_front +
1000 cmd->chanlist_len +
1001 devpriv->ai_add_back) & 1)
1002 devpriv->ai_add_front++;
1003 /* round up to 32 bit */
1004 }
1005 }
1006 /* well, we now know what must be all added */
1007 scanlen = devpriv->ai_add_front + cmd->chanlist_len +
1008 devpriv->ai_add_back;
1009 /*
1010 * what we must take from card in real to have cmd->scan_end_arg
1011 * on output?
1012 */
1013 devpriv->ai_n_realscanlen = scanlen *
1014 (cmd->scan_end_arg / cmd->chanlist_len);
1015
1016 if (scanlen > s->len_chanlist) {
1017 dev_err(dev->class_dev,
1018 "range/channel list is too long for actual configuration!\n");
1019 return -EINVAL;
1020 }
1021
1022 /*
1023 * Configure analog input and load the chanlist.
1024 * The acqusition control bits are enabled later.
1025 */
1026 pci9118_set_chanlist(dev, s, cmd->chanlist_len, cmd->chanlist,
1027 devpriv->ai_add_front, devpriv->ai_add_back);
1028
1029 /* Determine acqusition mode and calculate timing */
1030 devpriv->ai_do = 0;
1031 if (cmd->scan_begin_src != TRIG_TIMER &&
1032 cmd->convert_src == TRIG_TIMER) {
1033 /* cascaded timers 1 and 2 are used for convert timing */
1034 if (cmd->scan_begin_src == TRIG_EXT)
1035 devpriv->ai_do = 4;
1036 else
1037 devpriv->ai_do = 1;
1038
1039 comedi_8254_cascade_ns_to_timer(pacer, &cmd->convert_arg,
1040 devpriv->ai_flags &
1041 CMDF_ROUND_NEAREST);
1042 comedi_8254_update_divisors(pacer);
1043
1044 devpriv->ai_ctrl |= PCI9118_AI_CTRL_TMRTR;
1045
1046 if (!devpriv->usedma) {
1047 devpriv->ai_ctrl |= PCI9118_AI_CTRL_INT;
1048 devpriv->int_ctrl |= PCI9118_INT_CTRL_TIMER;
1049 }
1050
1051 if (cmd->scan_begin_src == TRIG_EXT) {
1052 struct pci9118_dmabuf *dmabuf = &devpriv->dmabuf[0];
1053
1054 devpriv->ai_cfg |= PCI9118_AI_CFG_AM;
1055 outl(devpriv->ai_cfg, dev->iobase + PCI9118_AI_CFG_REG);
1056 comedi_8254_load(pacer, 0, dmabuf->hw >> 1,
1057 I8254_MODE0 | I8254_BINARY);
1058 devpriv->ai_cfg |= PCI9118_AI_CFG_START;
1059 }
1060 }
1061
1062 if (cmd->scan_begin_src == TRIG_TIMER &&
1063 cmd->convert_src != TRIG_EXT) {
1064 if (!devpriv->usedma) {
1065 dev_err(dev->class_dev,
1066 "cmd->scan_begin_src=TRIG_TIMER works only with bus mastering!\n");
1067 return -EIO;
1068 }
1069
1070 /* double timed action */
1071 devpriv->ai_do = 2;
1072
1073 pci9118_calc_divisors(dev, s,
1074 &cmd->scan_begin_arg, &cmd->convert_arg,
1075 devpriv->ai_flags,
1076 devpriv->ai_n_realscanlen,
1077 &pacer->divisor1,
1078 &pacer->divisor2,
1079 devpriv->ai_add_front);
1080
1081 devpriv->ai_ctrl |= PCI9118_AI_CTRL_TMRTR;
1082 devpriv->ai_cfg |= PCI9118_AI_CFG_BM | PCI9118_AI_CFG_BS;
1083 if (cmd->convert_src == TRIG_NOW && !devpriv->softsshdelay)
1084 devpriv->ai_cfg |= PCI9118_AI_CFG_BSSH;
1085 outl(devpriv->ai_n_realscanlen,
1086 dev->iobase + PCI9118_AI_BURST_NUM_REG);
1087 }
1088
1089 if (cmd->scan_begin_src == TRIG_FOLLOW &&
1090 cmd->convert_src == TRIG_EXT) {
1091 /* external trigger conversion */
1092 devpriv->ai_do = 3;
1093
1094 devpriv->ai_ctrl |= PCI9118_AI_CTRL_EXTM;
1095 }
1096
1097 if (devpriv->ai_do == 0) {
1098 dev_err(dev->class_dev,
1099 "Unable to determine acqusition mode! BUG in (*do_cmdtest)?\n");
1100 return -EINVAL;
1101 }
1102
1103 if (devpriv->usedma)
1104 devpriv->ai_ctrl |= PCI9118_AI_CTRL_DMA;
1105
1106 /* set default config (disable burst and triggers) */
1107 devpriv->ai_cfg = PCI9118_AI_CFG_PDTRG | PCI9118_AI_CFG_PETRG;
1108 outl(devpriv->ai_cfg, dev->iobase + PCI9118_AI_CFG_REG);
1109 udelay(1);
1110 pci9118_ai_reset_fifo(dev);
1111
1112 /* clear A/D and INT status registers */
1113 inl(dev->iobase + PCI9118_AI_STATUS_REG);
1114 inl(dev->iobase + PCI9118_INT_CTRL_REG);
1115
1116 devpriv->ai_act_dmapos = 0;
1117
1118 if (devpriv->usedma) {
1119 pci9118_ai_setup_dma(dev, s);
1120
1121 outl(0x02000000 | AINT_WRITE_COMPL,
1122 devpriv->iobase_a + AMCC_OP_REG_INTCSR);
1123 } else {
1124 pci9118_amcc_int_ena(dev, true);
1125 }
1126
1127 /* start async command now or wait for internal trigger */
1128 if (cmd->start_src == TRIG_NOW)
1129 pci9118_ai_cmd_start(dev);
1130 else if (cmd->start_src == TRIG_INT)
1131 s->async->inttrig = pci9118_ai_inttrig;
1132
1133 /* enable external trigger for command start/stop */
1134 if (cmd->start_src == TRIG_EXT || cmd->stop_src == TRIG_EXT)
1135 pci9118_exttrg_enable(dev, true);
1136
1137 return 0;
1138 }
1139
1140 static int pci9118_ai_cmdtest(struct comedi_device *dev,
1141 struct comedi_subdevice *s,
1142 struct comedi_cmd *cmd)
1143 {
1144 struct pci9118_private *devpriv = dev->private;
1145 int err = 0;
1146 unsigned int flags;
1147 unsigned int arg;
1148
1149 /* Step 1 : check if triggers are trivially valid */
1150
1151 err |= comedi_check_trigger_src(&cmd->start_src,
1152 TRIG_NOW | TRIG_EXT | TRIG_INT);
1153
1154 flags = TRIG_FOLLOW;
1155 if (devpriv->master)
1156 flags |= TRIG_TIMER | TRIG_EXT;
1157 err |= comedi_check_trigger_src(&cmd->scan_begin_src, flags);
1158
1159 flags = TRIG_TIMER | TRIG_EXT;
1160 if (devpriv->master)
1161 flags |= TRIG_NOW;
1162 err |= comedi_check_trigger_src(&cmd->convert_src, flags);
1163
1164 err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
1165 err |= comedi_check_trigger_src(&cmd->stop_src,
1166 TRIG_COUNT | TRIG_NONE | TRIG_EXT);
1167
1168 if (err)
1169 return 1;
1170
1171 /* Step 2a : make sure trigger sources are unique */
1172
1173 err |= comedi_check_trigger_is_unique(cmd->start_src);
1174 err |= comedi_check_trigger_is_unique(cmd->scan_begin_src);
1175 err |= comedi_check_trigger_is_unique(cmd->convert_src);
1176 err |= comedi_check_trigger_is_unique(cmd->stop_src);
1177
1178 /* Step 2b : and mutually compatible */
1179
1180 if (cmd->start_src == TRIG_EXT && cmd->scan_begin_src == TRIG_EXT)
1181 err |= -EINVAL;
1182
1183 if ((cmd->scan_begin_src & (TRIG_TIMER | TRIG_EXT)) &&
1184 (!(cmd->convert_src & (TRIG_TIMER | TRIG_NOW))))
1185 err |= -EINVAL;
1186
1187 if ((cmd->scan_begin_src == TRIG_FOLLOW) &&
1188 (!(cmd->convert_src & (TRIG_TIMER | TRIG_EXT))))
1189 err |= -EINVAL;
1190
1191 if (cmd->stop_src == TRIG_EXT && cmd->scan_begin_src == TRIG_EXT)
1192 err |= -EINVAL;
1193
1194 if (err)
1195 return 2;
1196
1197 /* Step 3: check if arguments are trivially valid */
1198
1199 switch (cmd->start_src) {
1200 case TRIG_NOW:
1201 case TRIG_EXT:
1202 err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
1203 break;
1204 case TRIG_INT:
1205 /* start_arg is the internal trigger (any value) */
1206 break;
1207 }
1208
1209 if (cmd->scan_begin_src & (TRIG_FOLLOW | TRIG_EXT))
1210 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
1211
1212 if ((cmd->scan_begin_src == TRIG_TIMER) &&
1213 (cmd->convert_src == TRIG_TIMER) && (cmd->scan_end_arg == 1)) {
1214 cmd->scan_begin_src = TRIG_FOLLOW;
1215 cmd->convert_arg = cmd->scan_begin_arg;
1216 cmd->scan_begin_arg = 0;
1217 }
1218
1219 if (cmd->scan_begin_src == TRIG_TIMER) {
1220 err |= comedi_check_trigger_arg_min(&cmd->scan_begin_arg,
1221 devpriv->ai_ns_min);
1222 }
1223
1224 if (cmd->scan_begin_src == TRIG_EXT) {
1225 if (cmd->scan_begin_arg) {
1226 cmd->scan_begin_arg = 0;
1227 err |= -EINVAL;
1228 err |= comedi_check_trigger_arg_max(&cmd->scan_end_arg,
1229 65535);
1230 }
1231 }
1232
1233 if (cmd->convert_src & (TRIG_TIMER | TRIG_NOW)) {
1234 err |= comedi_check_trigger_arg_min(&cmd->convert_arg,
1235 devpriv->ai_ns_min);
1236 }
1237
1238 if (cmd->convert_src == TRIG_EXT)
1239 err |= comedi_check_trigger_arg_is(&cmd->convert_arg, 0);
1240
1241 if (cmd->stop_src == TRIG_COUNT)
1242 err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
1243 else /* TRIG_NONE */
1244 err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
1245
1246 err |= comedi_check_trigger_arg_min(&cmd->chanlist_len, 1);
1247
1248 err |= comedi_check_trigger_arg_min(&cmd->scan_end_arg,
1249 cmd->chanlist_len);
1250
1251 if ((cmd->scan_end_arg % cmd->chanlist_len)) {
1252 cmd->scan_end_arg =
1253 cmd->chanlist_len * (cmd->scan_end_arg / cmd->chanlist_len);
1254 err |= -EINVAL;
1255 }
1256
1257 if (err)
1258 return 3;
1259
1260 /* step 4: fix up any arguments */
1261
1262 if (cmd->scan_begin_src == TRIG_TIMER) {
1263 arg = cmd->scan_begin_arg;
1264 comedi_8254_cascade_ns_to_timer(dev->pacer, &arg, cmd->flags);
1265 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, arg);
1266 }
1267
1268 if (cmd->convert_src & (TRIG_TIMER | TRIG_NOW)) {
1269 arg = cmd->convert_arg;
1270 comedi_8254_cascade_ns_to_timer(dev->pacer, &arg, cmd->flags);
1271 err |= comedi_check_trigger_arg_is(&cmd->convert_arg, arg);
1272
1273 if (cmd->scan_begin_src == TRIG_TIMER &&
1274 cmd->convert_src == TRIG_NOW) {
1275 if (cmd->convert_arg == 0) {
1276 arg = devpriv->ai_ns_min *
1277 (cmd->scan_end_arg + 2);
1278 } else {
1279 arg = cmd->convert_arg * cmd->chanlist_len;
1280 }
1281 err |= comedi_check_trigger_arg_min(&cmd->
1282 scan_begin_arg,
1283 arg);
1284 }
1285 }
1286
1287 if (err)
1288 return 4;
1289
1290 /* Step 5: check channel list if it exists */
1291
1292 if (cmd->chanlist)
1293 err |= pci9118_ai_check_chanlist(dev, s, cmd);
1294
1295 if (err)
1296 return 5;
1297
1298 return 0;
1299 }
1300
1301 static int pci9118_ai_eoc(struct comedi_device *dev,
1302 struct comedi_subdevice *s,
1303 struct comedi_insn *insn,
1304 unsigned long context)
1305 {
1306 unsigned int status;
1307
1308 status = inl(dev->iobase + PCI9118_AI_STATUS_REG);
1309 if (status & PCI9118_AI_STATUS_ADRDY)
1310 return 0;
1311 return -EBUSY;
1312 }
1313
1314 static void pci9118_ai_start_conv(struct comedi_device *dev)
1315 {
1316 /* writing any value triggers an A/D conversion */
1317 outl(0, dev->iobase + PCI9118_SOFTTRG_REG);
1318 }
1319
1320 static int pci9118_ai_insn_read(struct comedi_device *dev,
1321 struct comedi_subdevice *s,
1322 struct comedi_insn *insn,
1323 unsigned int *data)
1324 {
1325 struct pci9118_private *devpriv = dev->private;
1326 unsigned int val;
1327 int ret;
1328 int i;
1329
1330 /*
1331 * Configure analog input based on the chanspec.
1332 * Acqusition is software controlled without interrupts.
1333 */
1334 pci9118_set_chanlist(dev, s, 1, &insn->chanspec, 0, 0);
1335
1336 /* set default config (disable burst and triggers) */
1337 devpriv->ai_cfg = PCI9118_AI_CFG_PDTRG | PCI9118_AI_CFG_PETRG;
1338 outl(devpriv->ai_cfg, dev->iobase + PCI9118_AI_CFG_REG);
1339
1340 pci9118_ai_reset_fifo(dev);
1341
1342 for (i = 0; i < insn->n; i++) {
1343 pci9118_ai_start_conv(dev);
1344
1345 ret = comedi_timeout(dev, s, insn, pci9118_ai_eoc, 0);
1346 if (ret)
1347 return ret;
1348
1349 val = inl(dev->iobase + PCI9118_AI_FIFO_REG);
1350 if (s->maxdata == 0xffff)
1351 data[i] = (val & 0xffff) ^ 0x8000;
1352 else
1353 data[i] = (val >> 4) & 0xfff;
1354 }
1355
1356 return insn->n;
1357 }
1358
1359 static int pci9118_ao_insn_write(struct comedi_device *dev,
1360 struct comedi_subdevice *s,
1361 struct comedi_insn *insn,
1362 unsigned int *data)
1363 {
1364 unsigned int chan = CR_CHAN(insn->chanspec);
1365 unsigned int val = s->readback[chan];
1366 int i;
1367
1368 for (i = 0; i < insn->n; i++) {
1369 val = data[i];
1370 outl(val, dev->iobase + PCI9118_AO_REG(chan));
1371 }
1372 s->readback[chan] = val;
1373
1374 return insn->n;
1375 }
1376
1377 static int pci9118_di_insn_bits(struct comedi_device *dev,
1378 struct comedi_subdevice *s,
1379 struct comedi_insn *insn,
1380 unsigned int *data)
1381 {
1382 /*
1383 * The digital inputs and outputs share the read register.
1384 * bits [7:4] are the digital outputs
1385 * bits [3:0] are the digital inputs
1386 */
1387 data[1] = inl(dev->iobase + PCI9118_DIO_REG) & 0xf;
1388
1389 return insn->n;
1390 }
1391
1392 static int pci9118_do_insn_bits(struct comedi_device *dev,
1393 struct comedi_subdevice *s,
1394 struct comedi_insn *insn,
1395 unsigned int *data)
1396 {
1397 /*
1398 * The digital outputs are set with the same register that
1399 * the digital inputs and outputs are read from. But the
1400 * outputs are set with bits [3:0] so we can simply write
1401 * the s->state to set them.
1402 */
1403 if (comedi_dio_update_state(s, data))
1404 outl(s->state, dev->iobase + PCI9118_DIO_REG);
1405
1406 data[1] = s->state;
1407
1408 return insn->n;
1409 }
1410
1411 static void pci9118_reset(struct comedi_device *dev)
1412 {
1413 /* reset analog input subsystem */
1414 outl(0, dev->iobase + PCI9118_INT_CTRL_REG);
1415 outl(0, dev->iobase + PCI9118_AI_CTRL_REG);
1416 outl(0, dev->iobase + PCI9118_AI_CFG_REG);
1417 pci9118_ai_reset_fifo(dev);
1418
1419 /* clear any pending interrupts and status */
1420 inl(dev->iobase + PCI9118_INT_CTRL_REG);
1421 inl(dev->iobase + PCI9118_AI_STATUS_REG);
1422
1423 /* reset DMA and scan queue */
1424 outl(0, dev->iobase + PCI9118_AI_BURST_NUM_REG);
1425 outl(1, dev->iobase + PCI9118_AI_AUTOSCAN_MODE_REG);
1426 outl(2, dev->iobase + PCI9118_AI_AUTOSCAN_MODE_REG);
1427
1428 /* reset analog outputs to 0V */
1429 outl(2047, dev->iobase + PCI9118_AO_REG(0));
1430 outl(2047, dev->iobase + PCI9118_AO_REG(1));
1431 }
1432
1433 static struct pci_dev *pci9118_find_pci(struct comedi_device *dev,
1434 struct comedi_devconfig *it)
1435 {
1436 struct pci_dev *pcidev = NULL;
1437 int bus = it->options[0];
1438 int slot = it->options[1];
1439
1440 for_each_pci_dev(pcidev) {
1441 if (pcidev->vendor != PCI_VENDOR_ID_AMCC)
1442 continue;
1443 if (pcidev->device != 0x80d9)
1444 continue;
1445 if (bus || slot) {
1446 /* requested particular bus/slot */
1447 if (pcidev->bus->number != bus ||
1448 PCI_SLOT(pcidev->devfn) != slot)
1449 continue;
1450 }
1451 return pcidev;
1452 }
1453 dev_err(dev->class_dev,
1454 "no supported board found! (req. bus/slot : %d/%d)\n",
1455 bus, slot);
1456 return NULL;
1457 }
1458
1459 static void pci9118_alloc_dma(struct comedi_device *dev)
1460 {
1461 struct pci9118_private *devpriv = dev->private;
1462 struct pci9118_dmabuf *dmabuf;
1463 int order;
1464 int i;
1465
1466 for (i = 0; i < 2; i++) {
1467 dmabuf = &devpriv->dmabuf[i];
1468 for (order = 2; order >= 0; order--) {
1469 dmabuf->virt =
1470 dma_alloc_coherent(dev->hw_dev, PAGE_SIZE << order,
1471 &dmabuf->hw, GFP_KERNEL);
1472 if (dmabuf->virt)
1473 break;
1474 }
1475 if (!dmabuf->virt)
1476 break;
1477 dmabuf->size = PAGE_SIZE << order;
1478
1479 if (i == 0)
1480 devpriv->master = 1;
1481 if (i == 1)
1482 devpriv->dma_doublebuf = 1;
1483 }
1484 }
1485
1486 static void pci9118_free_dma(struct comedi_device *dev)
1487 {
1488 struct pci9118_private *devpriv = dev->private;
1489 struct pci9118_dmabuf *dmabuf;
1490 int i;
1491
1492 if (!devpriv)
1493 return;
1494
1495 for (i = 0; i < 2; i++) {
1496 dmabuf = &devpriv->dmabuf[i];
1497 if (dmabuf->virt) {
1498 dma_free_coherent(dev->hw_dev, dmabuf->size,
1499 dmabuf->virt, dmabuf->hw);
1500 }
1501 }
1502 }
1503
1504 static int pci9118_common_attach(struct comedi_device *dev,
1505 int ext_mux, int softsshdelay)
1506 {
1507 const struct pci9118_boardinfo *board = dev->board_ptr;
1508 struct pci_dev *pcidev = comedi_to_pci_dev(dev);
1509 struct pci9118_private *devpriv;
1510 struct comedi_subdevice *s;
1511 int ret;
1512 int i;
1513 u16 u16w;
1514
1515 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
1516 if (!devpriv)
1517 return -ENOMEM;
1518
1519 ret = comedi_pci_enable(dev);
1520 if (ret)
1521 return ret;
1522 pci_set_master(pcidev);
1523
1524 devpriv->iobase_a = pci_resource_start(pcidev, 0);
1525 dev->iobase = pci_resource_start(pcidev, 2);
1526
1527 dev->pacer = comedi_8254_init(dev->iobase + PCI9118_TIMER_BASE,
1528 I8254_OSC_BASE_4MHZ, I8254_IO32, 0);
1529 if (!dev->pacer)
1530 return -ENOMEM;
1531
1532 pci9118_reset(dev);
1533
1534 if (pcidev->irq) {
1535 ret = request_irq(pcidev->irq, pci9118_interrupt, IRQF_SHARED,
1536 dev->board_name, dev);
1537 if (ret == 0) {
1538 dev->irq = pcidev->irq;
1539
1540 pci9118_alloc_dma(dev);
1541 }
1542 }
1543
1544 if (ext_mux > 0) {
1545 if (ext_mux > 256)
1546 ext_mux = 256; /* max 256 channels! */
1547 if (softsshdelay > 0)
1548 if (ext_mux > 128)
1549 ext_mux = 128;
1550 devpriv->usemux = 1;
1551 } else {
1552 devpriv->usemux = 0;
1553 }
1554
1555 if (softsshdelay < 0) {
1556 /* select sample&hold signal polarity */
1557 devpriv->softsshdelay = -softsshdelay;
1558 devpriv->softsshsample = 0x80;
1559 devpriv->softsshhold = 0x00;
1560 } else {
1561 devpriv->softsshdelay = softsshdelay;
1562 devpriv->softsshsample = 0x00;
1563 devpriv->softsshhold = 0x80;
1564 }
1565
1566 pci_read_config_word(pcidev, PCI_COMMAND, &u16w);
1567 pci_write_config_word(pcidev, PCI_COMMAND, u16w | 64);
1568 /* Enable parity check for parity error */
1569
1570 ret = comedi_alloc_subdevices(dev, 4);
1571 if (ret)
1572 return ret;
1573
1574 /* Analog Input subdevice */
1575 s = &dev->subdevices[0];
1576 s->type = COMEDI_SUBD_AI;
1577 s->subdev_flags = SDF_READABLE | SDF_COMMON | SDF_GROUND | SDF_DIFF;
1578 s->n_chan = (devpriv->usemux) ? ext_mux : 16;
1579 s->maxdata = board->ai_is_16bit ? 0xffff : 0x0fff;
1580 s->range_table = board->is_hg ? &pci9118hg_ai_range
1581 : &pci9118_ai_range;
1582 s->insn_read = pci9118_ai_insn_read;
1583 if (dev->irq) {
1584 dev->read_subdev = s;
1585 s->subdev_flags |= SDF_CMD_READ;
1586 s->len_chanlist = 255;
1587 s->do_cmdtest = pci9118_ai_cmdtest;
1588 s->do_cmd = pci9118_ai_cmd;
1589 s->cancel = pci9118_ai_cancel;
1590 s->munge = pci9118_ai_munge;
1591 }
1592
1593 if (s->maxdata == 0xffff) {
1594 /*
1595 * 16-bit samples are from an ADS7805 A/D converter.
1596 * Minimum sampling rate is 10us.
1597 */
1598 devpriv->ai_ns_min = 10000;
1599 } else {
1600 /*
1601 * 12-bit samples are from an ADS7800 A/D converter.
1602 * Minimum sampling rate is 3us.
1603 */
1604 devpriv->ai_ns_min = 3000;
1605 }
1606
1607 /* Analog Output subdevice */
1608 s = &dev->subdevices[1];
1609 s->type = COMEDI_SUBD_AO;
1610 s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_COMMON;
1611 s->n_chan = 2;
1612 s->maxdata = 0x0fff;
1613 s->range_table = &range_bipolar10;
1614 s->insn_write = pci9118_ao_insn_write;
1615
1616 ret = comedi_alloc_subdev_readback(s);
1617 if (ret)
1618 return ret;
1619
1620 /* the analog outputs were reset to 0V, make the readback match */
1621 for (i = 0; i < s->n_chan; i++)
1622 s->readback[i] = 2047;
1623
1624 /* Digital Input subdevice */
1625 s = &dev->subdevices[2];
1626 s->type = COMEDI_SUBD_DI;
1627 s->subdev_flags = SDF_READABLE;
1628 s->n_chan = 4;
1629 s->maxdata = 1;
1630 s->range_table = &range_digital;
1631 s->insn_bits = pci9118_di_insn_bits;
1632
1633 /* Digital Output subdevice */
1634 s = &dev->subdevices[3];
1635 s->type = COMEDI_SUBD_DO;
1636 s->subdev_flags = SDF_WRITABLE;
1637 s->n_chan = 4;
1638 s->maxdata = 1;
1639 s->range_table = &range_digital;
1640 s->insn_bits = pci9118_do_insn_bits;
1641
1642 /* get the current state of the digital outputs */
1643 s->state = inl(dev->iobase + PCI9118_DIO_REG) >> 4;
1644
1645 return 0;
1646 }
1647
1648 static int pci9118_attach(struct comedi_device *dev,
1649 struct comedi_devconfig *it)
1650 {
1651 struct pci_dev *pcidev;
1652 int ext_mux, softsshdelay;
1653
1654 ext_mux = it->options[2];
1655 softsshdelay = it->options[4];
1656
1657 pcidev = pci9118_find_pci(dev, it);
1658 if (!pcidev)
1659 return -EIO;
1660 comedi_set_hw_dev(dev, &pcidev->dev);
1661
1662 return pci9118_common_attach(dev, ext_mux, softsshdelay);
1663 }
1664
1665 static int pci9118_auto_attach(struct comedi_device *dev,
1666 unsigned long context)
1667 {
1668 struct pci_dev *pcidev = comedi_to_pci_dev(dev);
1669 const struct pci9118_boardinfo *board = NULL;
1670
1671 if (context < ARRAY_SIZE(pci9118_boards))
1672 board = &pci9118_boards[context];
1673 if (!board)
1674 return -ENODEV;
1675 dev->board_ptr = board;
1676 dev->board_name = board->name;
1677
1678 /*
1679 * Need to 'get' the PCI device to match the 'put' in pci9118_detach().
1680 * (The 'put' also matches the implicit 'get' by pci9118_find_pci().)
1681 */
1682 pci_dev_get(pcidev);
1683 /* no external mux, no sample-hold delay */
1684 return pci9118_common_attach(dev, 0, 0);
1685 }
1686
1687 static void pci9118_detach(struct comedi_device *dev)
1688 {
1689 struct pci_dev *pcidev = comedi_to_pci_dev(dev);
1690
1691 if (dev->iobase)
1692 pci9118_reset(dev);
1693 comedi_pci_detach(dev);
1694 pci9118_free_dma(dev);
1695 if (pcidev)
1696 pci_dev_put(pcidev);
1697 }
1698
1699 static struct comedi_driver adl_pci9118_driver = {
1700 .driver_name = "adl_pci9118",
1701 .module = THIS_MODULE,
1702 .attach = pci9118_attach,
1703 .auto_attach = pci9118_auto_attach,
1704 .detach = pci9118_detach,
1705 .num_names = ARRAY_SIZE(pci9118_boards),
1706 .board_name = &pci9118_boards[0].name,
1707 .offset = sizeof(struct pci9118_boardinfo),
1708 };
1709
1710 static int adl_pci9118_pci_probe(struct pci_dev *dev,
1711 const struct pci_device_id *id)
1712 {
1713 return comedi_pci_auto_config(dev, &adl_pci9118_driver,
1714 id->driver_data);
1715 }
1716
1717 /* FIXME: All the supported board types have the same device ID! */
1718 static const struct pci_device_id adl_pci9118_pci_table[] = {
1719 { PCI_VDEVICE(AMCC, 0x80d9), BOARD_PCI9118DG },
1720 /* { PCI_VDEVICE(AMCC, 0x80d9), BOARD_PCI9118HG }, */
1721 /* { PCI_VDEVICE(AMCC, 0x80d9), BOARD_PCI9118HR }, */
1722 { 0 }
1723 };
1724 MODULE_DEVICE_TABLE(pci, adl_pci9118_pci_table);
1725
1726 static struct pci_driver adl_pci9118_pci_driver = {
1727 .name = "adl_pci9118",
1728 .id_table = adl_pci9118_pci_table,
1729 .probe = adl_pci9118_pci_probe,
1730 .remove = comedi_pci_auto_unconfig,
1731 };
1732 module_comedi_pci_driver(adl_pci9118_driver, adl_pci9118_pci_driver);
1733
1734 MODULE_AUTHOR("Comedi http://www.comedi.org");
1735 MODULE_DESCRIPTION("Comedi low-level driver");
1736 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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