1// SPDX-License-Identifier: GPL-2.0
2/*
3 * comedi/drivers/adv_pci_dio.c
4 *
5 * Author: Michal Dobes <dobes@tesnet.cz>
6 *
7 * Hardware driver for Advantech PCI DIO cards.
8 */
9
10/*
11 * Driver: adv_pci_dio
12 * Description: Advantech Digital I/O Cards
13 * Devices: [Advantech] PCI-1730 (adv_pci_dio), PCI-1733,
14 * PCI-1734, PCI-1735U, PCI-1736UP, PCI-1739U, PCI-1750,
15 * PCI-1751, PCI-1752, PCI-1753, PCI-1753+PCI-1753E,
16 * PCI-1754, PCI-1756, PCI-1761, PCI-1762
17 * Author: Michal Dobes <dobes@tesnet.cz>
18 * Updated: Fri, 25 Aug 2017 07:23:06 +0300
19 * Status: untested
20 *
21 * Configuration Options: not applicable, uses PCI auto config
22 */
23
24#include <linux/module.h>
25#include <linux/delay.h>
26#include <linux/comedi/comedi_pci.h>
27#include <linux/comedi/comedi_8255.h>
28#include <linux/comedi/comedi_8254.h>
29
30/*
31 * Register offset definitions
32 */
33
34/* PCI-1730, PCI-1733, PCI-1736 interrupt control registers */
35#define PCI173X_INT_EN_REG 0x0008 /* R/W: enable/disable */
36#define PCI173X_INT_RF_REG 0x000c /* R/W: falling/rising edge */
37#define PCI173X_INT_FLAG_REG 0x0010 /* R: status */
38#define PCI173X_INT_CLR_REG 0x0010 /* W: clear */
39
40#define PCI173X_INT_IDI0 0x01 /* IDI0 edge occurred */
41#define PCI173X_INT_IDI1 0x02 /* IDI1 edge occurred */
42#define PCI173X_INT_DI0 0x04 /* DI0 edge occurred */
43#define PCI173X_INT_DI1 0x08 /* DI1 edge occurred */
44
45/* PCI-1739U, PCI-1750, PCI1751 interrupt control registers */
46#define PCI1750_INT_REG 0x20 /* R/W: status/control */
47
48/* PCI-1753, PCI-1753E interrupt control registers */
49#define PCI1753_INT_REG(x) (0x10 + (x)) /* R/W: control group 0 to 3 */
50#define PCI1753E_INT_REG(x) (0x30 + (x)) /* R/W: control group 0 to 3 */
51
52/* PCI-1754, PCI-1756 interrupt control registers */
53#define PCI1754_INT_REG(x) (0x08 + (x) * 2) /* R/W: control group 0 to 3 */
54
55/* PCI-1752, PCI-1756 special registers */
56#define PCI1752_CFC_REG 0x12 /* R/W: channel freeze function */
57
58/* PCI-1761 interrupt control registers */
59#define PCI1761_INT_EN_REG 0x03 /* R/W: enable/disable interrupts */
60#define PCI1761_INT_RF_REG 0x04 /* R/W: falling/rising edge */
61#define PCI1761_INT_CLR_REG 0x05 /* R/W: clear interrupts */
62
63/* PCI-1762 interrupt control registers */
64#define PCI1762_INT_REG 0x06 /* R/W: status/control */
65
66/* maximum number of subdevice descriptions in the boardinfo */
67#define PCI_DIO_MAX_DI_SUBDEVS 2 /* 2 x 8/16/32 input channels max */
68#define PCI_DIO_MAX_DO_SUBDEVS 2 /* 2 x 8/16/32 output channels max */
69#define PCI_DIO_MAX_DIO_SUBDEVG 2 /* 2 x any number of 8255 devices max */
70#define PCI_DIO_MAX_IRQ_SUBDEVS 4 /* 4 x 1 input IRQ channels max */
71
72enum pci_dio_boardid {
73 TYPE_PCI1730,
74 TYPE_PCI1733,
75 TYPE_PCI1734,
76 TYPE_PCI1735,
77 TYPE_PCI1736,
78 TYPE_PCI1739,
79 TYPE_PCI1750,
80 TYPE_PCI1751,
81 TYPE_PCI1752,
82 TYPE_PCI1753,
83 TYPE_PCI1753E,
84 TYPE_PCI1754,
85 TYPE_PCI1756,
86 TYPE_PCI1761,
87 TYPE_PCI1762
88};
89
90struct diosubd_data {
91 int chans; /* num of chans or 8255 devices */
92 unsigned long addr; /* PCI address offset */
93};
94
95struct dio_irq_subd_data {
96 unsigned short int_en; /* interrupt enable/status bit */
97 unsigned long addr; /* PCI address offset */
98};
99
100struct dio_boardtype {
101 const char *name; /* board name */
102 int nsubdevs;
103 struct diosubd_data sdi[PCI_DIO_MAX_DI_SUBDEVS];
104 struct diosubd_data sdo[PCI_DIO_MAX_DO_SUBDEVS];
105 struct diosubd_data sdio[PCI_DIO_MAX_DIO_SUBDEVG];
106 struct dio_irq_subd_data sdirq[PCI_DIO_MAX_IRQ_SUBDEVS];
107 unsigned long id_reg;
108 unsigned long timer_regbase;
109 unsigned int is_16bit:1;
110};
111
112static const struct dio_boardtype boardtypes[] = {
113 [TYPE_PCI1730] = {
114 .name = "pci1730",
115 /* DI, IDI, DO, IDO, ID, IRQ_DI0, IRQ_DI1, IRQ_IDI0, IRQ_IDI1 */
116 .nsubdevs = 9,
117 .sdi[0] = { 16, 0x02, }, /* DI 0-15 */
118 .sdi[1] = { 16, 0x00, }, /* ISO DI 0-15 */
119 .sdo[0] = { 16, 0x02, }, /* DO 0-15 */
120 .sdo[1] = { 16, 0x00, }, /* ISO DO 0-15 */
121 .id_reg = 0x04,
122 .sdirq[0] = { PCI173X_INT_DI0, 0x02, }, /* DI 0 */
123 .sdirq[1] = { PCI173X_INT_DI1, 0x02, }, /* DI 1 */
124 .sdirq[2] = { PCI173X_INT_IDI0, 0x00, }, /* ISO DI 0 */
125 .sdirq[3] = { PCI173X_INT_IDI1, 0x00, }, /* ISO DI 1 */
126 },
127 [TYPE_PCI1733] = {
128 .name = "pci1733",
129 .nsubdevs = 2,
130 .sdi[1] = { 32, 0x00, }, /* ISO DI 0-31 */
131 .id_reg = 0x04,
132 },
133 [TYPE_PCI1734] = {
134 .name = "pci1734",
135 .nsubdevs = 2,
136 .sdo[1] = { 32, 0x00, }, /* ISO DO 0-31 */
137 .id_reg = 0x04,
138 },
139 [TYPE_PCI1735] = {
140 .name = "pci1735",
141 .nsubdevs = 4,
142 .sdi[0] = { 32, 0x00, }, /* DI 0-31 */
143 .sdo[0] = { 32, 0x00, }, /* DO 0-31 */
144 .id_reg = 0x08,
145 .timer_regbase = 0x04,
146 },
147 [TYPE_PCI1736] = {
148 .name = "pci1736",
149 .nsubdevs = 3,
150 .sdi[1] = { 16, 0x00, }, /* ISO DI 0-15 */
151 .sdo[1] = { 16, 0x00, }, /* ISO DO 0-15 */
152 .id_reg = 0x04,
153 },
154 [TYPE_PCI1739] = {
155 .name = "pci1739",
156 .nsubdevs = 3,
157 .sdio[0] = { 2, 0x00, }, /* 8255 DIO */
158 .id_reg = 0x08,
159 },
160 [TYPE_PCI1750] = {
161 .name = "pci1750",
162 .nsubdevs = 2,
163 .sdi[1] = { 16, 0x00, }, /* ISO DI 0-15 */
164 .sdo[1] = { 16, 0x00, }, /* ISO DO 0-15 */
165 },
166 [TYPE_PCI1751] = {
167 .name = "pci1751",
168 .nsubdevs = 3,
169 .sdio[0] = { 2, 0x00, }, /* 8255 DIO */
170 .timer_regbase = 0x18,
171 },
172 [TYPE_PCI1752] = {
173 .name = "pci1752",
174 .nsubdevs = 3,
175 .sdo[0] = { 32, 0x00, }, /* DO 0-31 */
176 .sdo[1] = { 32, 0x04, }, /* DO 32-63 */
177 .id_reg = 0x10,
178 .is_16bit = 1,
179 },
180 [TYPE_PCI1753] = {
181 .name = "pci1753",
182 .nsubdevs = 4,
183 .sdio[0] = { 4, 0x00, }, /* 8255 DIO */
184 },
185 [TYPE_PCI1753E] = {
186 .name = "pci1753e",
187 .nsubdevs = 8,
188 .sdio[0] = { 4, 0x00, }, /* 8255 DIO */
189 .sdio[1] = { 4, 0x20, }, /* 8255 DIO */
190 },
191 [TYPE_PCI1754] = {
192 .name = "pci1754",
193 .nsubdevs = 3,
194 .sdi[0] = { 32, 0x00, }, /* DI 0-31 */
195 .sdi[1] = { 32, 0x04, }, /* DI 32-63 */
196 .id_reg = 0x10,
197 .is_16bit = 1,
198 },
199 [TYPE_PCI1756] = {
200 .name = "pci1756",
201 .nsubdevs = 3,
202 .sdi[1] = { 32, 0x00, }, /* DI 0-31 */
203 .sdo[1] = { 32, 0x04, }, /* DO 0-31 */
204 .id_reg = 0x10,
205 .is_16bit = 1,
206 },
207 [TYPE_PCI1761] = {
208 .name = "pci1761",
209 .nsubdevs = 3,
210 .sdi[1] = { 8, 0x01 }, /* ISO DI 0-7 */
211 .sdo[1] = { 8, 0x00 }, /* RELAY DO 0-7 */
212 .id_reg = 0x02,
213 },
214 [TYPE_PCI1762] = {
215 .name = "pci1762",
216 .nsubdevs = 3,
217 .sdi[1] = { 16, 0x02, }, /* ISO DI 0-15 */
218 .sdo[1] = { 16, 0x00, }, /* ISO DO 0-15 */
219 .id_reg = 0x04,
220 .is_16bit = 1,
221 },
222};
223
224struct pci_dio_dev_private_data {
225 int boardtype;
226 int irq_subd;
227 unsigned short int_ctrl;
228 unsigned short int_rf;
229};
230
231struct pci_dio_sd_private_data {
232 spinlock_t subd_slock; /* spin-lock for cmd_running */
233 unsigned long port_offset;
234 short int cmd_running;
235};
236
237static void process_irq(struct comedi_device *dev, unsigned int subdev,
238 unsigned char irqflags)
239{
240 struct comedi_subdevice *s = &dev->subdevices[subdev];
241 struct pci_dio_sd_private_data *sd_priv = s->private;
242 unsigned long reg = sd_priv->port_offset;
243 struct comedi_async *async_p = s->async;
244
245 if (async_p) {
246 unsigned short val = inw(port: dev->iobase + reg);
247
248 spin_lock(lock: &sd_priv->subd_slock);
249 if (sd_priv->cmd_running)
250 comedi_buf_write_samples(s, data: &val, nsamples: 1);
251 spin_unlock(lock: &sd_priv->subd_slock);
252 comedi_handle_events(dev, s);
253 }
254}
255
256static irqreturn_t pci_dio_interrupt(int irq, void *p_device)
257{
258 struct comedi_device *dev = p_device;
259 struct pci_dio_dev_private_data *dev_private = dev->private;
260 const struct dio_boardtype *board = dev->board_ptr;
261 unsigned long cpu_flags;
262 unsigned char irqflags;
263 int i;
264
265 if (!dev->attached) {
266 /* Ignore interrupt before device fully attached. */
267 /* Might not even have allocated subdevices yet! */
268 return IRQ_NONE;
269 }
270
271 /* Check if we are source of interrupt */
272 spin_lock_irqsave(&dev->spinlock, cpu_flags);
273 irqflags = inb(port: dev->iobase + PCI173X_INT_FLAG_REG);
274 if (!(irqflags & 0x0F)) {
275 spin_unlock_irqrestore(lock: &dev->spinlock, flags: cpu_flags);
276 return IRQ_NONE;
277 }
278
279 /* clear all current interrupt flags */
280 outb(value: irqflags, port: dev->iobase + PCI173X_INT_CLR_REG);
281 spin_unlock_irqrestore(lock: &dev->spinlock, flags: cpu_flags);
282
283 /* check irq subdevice triggers */
284 for (i = 0; i < PCI_DIO_MAX_IRQ_SUBDEVS; i++) {
285 if (irqflags & board->sdirq[i].int_en)
286 process_irq(dev, subdev: dev_private->irq_subd + i, irqflags);
287 }
288
289 return IRQ_HANDLED;
290}
291
292static int pci_dio_asy_cmdtest(struct comedi_device *dev,
293 struct comedi_subdevice *s,
294 struct comedi_cmd *cmd)
295{
296 int err = 0;
297
298 /* Step 1 : check if triggers are trivially valid */
299
300 err |= comedi_check_trigger_src(src: &cmd->start_src, TRIG_NOW);
301 err |= comedi_check_trigger_src(src: &cmd->scan_begin_src, TRIG_EXT);
302 err |= comedi_check_trigger_src(src: &cmd->convert_src, TRIG_FOLLOW);
303 err |= comedi_check_trigger_src(src: &cmd->scan_end_src, TRIG_COUNT);
304 err |= comedi_check_trigger_src(src: &cmd->stop_src, TRIG_NONE);
305
306 if (err)
307 return 1;
308
309 /* Step 2a : make sure trigger sources are unique */
310 /* Step 2b : and mutually compatible */
311
312 /* Step 3: check if arguments are trivially valid */
313
314 err |= comedi_check_trigger_arg_is(arg: &cmd->start_arg, val: 0);
315 /*
316 * For scan_begin_arg, the trigger number must be 0 and the only
317 * allowed flags are CR_EDGE and CR_INVERT. CR_EDGE is ignored,
318 * CR_INVERT sets the trigger to falling edge.
319 */
320 if (cmd->scan_begin_arg & ~(CR_EDGE | CR_INVERT)) {
321 cmd->scan_begin_arg &= (CR_EDGE | CR_INVERT);
322 err |= -EINVAL;
323 }
324 err |= comedi_check_trigger_arg_is(arg: &cmd->convert_arg, val: 0);
325 err |= comedi_check_trigger_arg_is(arg: &cmd->scan_end_arg,
326 val: cmd->chanlist_len);
327 err |= comedi_check_trigger_arg_is(arg: &cmd->stop_arg, val: 0);
328
329 if (err)
330 return 3;
331
332 /* Step 4: fix up any arguments */
333
334 /* Step 5: check channel list if it exists */
335
336 return 0;
337}
338
339static int pci_dio_asy_cmd(struct comedi_device *dev,
340 struct comedi_subdevice *s)
341{
342 struct pci_dio_dev_private_data *dev_private = dev->private;
343 struct pci_dio_sd_private_data *sd_priv = s->private;
344 const struct dio_boardtype *board = dev->board_ptr;
345 struct comedi_cmd *cmd = &s->async->cmd;
346 unsigned long cpu_flags;
347 unsigned short int_en;
348
349 int_en = board->sdirq[s->index - dev_private->irq_subd].int_en;
350
351 spin_lock_irqsave(&dev->spinlock, cpu_flags);
352 if (cmd->scan_begin_arg & CR_INVERT)
353 dev_private->int_rf |= int_en; /* falling edge */
354 else
355 dev_private->int_rf &= ~int_en; /* rising edge */
356 outb(value: dev_private->int_rf, port: dev->iobase + PCI173X_INT_RF_REG);
357 dev_private->int_ctrl |= int_en; /* enable interrupt source */
358 outb(value: dev_private->int_ctrl, port: dev->iobase + PCI173X_INT_EN_REG);
359 spin_unlock_irqrestore(lock: &dev->spinlock, flags: cpu_flags);
360
361 spin_lock_irqsave(&sd_priv->subd_slock, cpu_flags);
362 sd_priv->cmd_running = 1;
363 spin_unlock_irqrestore(lock: &sd_priv->subd_slock, flags: cpu_flags);
364
365 return 0;
366}
367
368static int pci_dio_asy_cancel(struct comedi_device *dev,
369 struct comedi_subdevice *s)
370{
371 struct pci_dio_dev_private_data *dev_private = dev->private;
372 struct pci_dio_sd_private_data *sd_priv = s->private;
373 const struct dio_boardtype *board = dev->board_ptr;
374 unsigned long cpu_flags;
375 unsigned short int_en;
376
377 spin_lock_irqsave(&sd_priv->subd_slock, cpu_flags);
378 sd_priv->cmd_running = 0;
379 spin_unlock_irqrestore(lock: &sd_priv->subd_slock, flags: cpu_flags);
380
381 int_en = board->sdirq[s->index - dev_private->irq_subd].int_en;
382
383 spin_lock_irqsave(&dev->spinlock, cpu_flags);
384 dev_private->int_ctrl &= ~int_en;
385 outb(value: dev_private->int_ctrl, port: dev->iobase + PCI173X_INT_EN_REG);
386 spin_unlock_irqrestore(lock: &dev->spinlock, flags: cpu_flags);
387
388 return 0;
389}
390
391/* same as _insn_bits_di_ because the IRQ-pins are the DI-ports */
392static int pci_dio_insn_bits_dirq_b(struct comedi_device *dev,
393 struct comedi_subdevice *s,
394 struct comedi_insn *insn,
395 unsigned int *data)
396{
397 struct pci_dio_sd_private_data *sd_priv = s->private;
398 unsigned long reg = (unsigned long)sd_priv->port_offset;
399 unsigned long iobase = dev->iobase + reg;
400
401 data[1] = inb(port: iobase);
402
403 return insn->n;
404}
405
406static int pci_dio_insn_bits_di_b(struct comedi_device *dev,
407 struct comedi_subdevice *s,
408 struct comedi_insn *insn,
409 unsigned int *data)
410{
411 unsigned long reg = (unsigned long)s->private;
412 unsigned long iobase = dev->iobase + reg;
413
414 data[1] = inb(port: iobase);
415 if (s->n_chan > 8)
416 data[1] |= (inb(port: iobase + 1) << 8);
417 if (s->n_chan > 16)
418 data[1] |= (inb(port: iobase + 2) << 16);
419 if (s->n_chan > 24)
420 data[1] |= (inb(port: iobase + 3) << 24);
421
422 return insn->n;
423}
424
425static int pci_dio_insn_bits_di_w(struct comedi_device *dev,
426 struct comedi_subdevice *s,
427 struct comedi_insn *insn,
428 unsigned int *data)
429{
430 unsigned long reg = (unsigned long)s->private;
431 unsigned long iobase = dev->iobase + reg;
432
433 data[1] = inw(port: iobase);
434 if (s->n_chan > 16)
435 data[1] |= (inw(port: iobase + 2) << 16);
436
437 return insn->n;
438}
439
440static int pci_dio_insn_bits_do_b(struct comedi_device *dev,
441 struct comedi_subdevice *s,
442 struct comedi_insn *insn,
443 unsigned int *data)
444{
445 unsigned long reg = (unsigned long)s->private;
446 unsigned long iobase = dev->iobase + reg;
447
448 if (comedi_dio_update_state(s, data)) {
449 outb(value: s->state & 0xff, port: iobase);
450 if (s->n_chan > 8)
451 outb(value: (s->state >> 8) & 0xff, port: iobase + 1);
452 if (s->n_chan > 16)
453 outb(value: (s->state >> 16) & 0xff, port: iobase + 2);
454 if (s->n_chan > 24)
455 outb(value: (s->state >> 24) & 0xff, port: iobase + 3);
456 }
457
458 data[1] = s->state;
459
460 return insn->n;
461}
462
463static int pci_dio_insn_bits_do_w(struct comedi_device *dev,
464 struct comedi_subdevice *s,
465 struct comedi_insn *insn,
466 unsigned int *data)
467{
468 unsigned long reg = (unsigned long)s->private;
469 unsigned long iobase = dev->iobase + reg;
470
471 if (comedi_dio_update_state(s, data)) {
472 outw(value: s->state & 0xffff, port: iobase);
473 if (s->n_chan > 16)
474 outw(value: (s->state >> 16) & 0xffff, port: iobase + 2);
475 }
476
477 data[1] = s->state;
478
479 return insn->n;
480}
481
482static int pci_dio_reset(struct comedi_device *dev, unsigned long cardtype)
483{
484 struct pci_dio_dev_private_data *dev_private = dev->private;
485 /* disable channel freeze function on the PCI-1752/1756 boards */
486 if (cardtype == TYPE_PCI1752 || cardtype == TYPE_PCI1756)
487 outw(value: 0, port: dev->iobase + PCI1752_CFC_REG);
488
489 /* disable and clear interrupts */
490 switch (cardtype) {
491 case TYPE_PCI1730:
492 case TYPE_PCI1733:
493 case TYPE_PCI1736:
494 dev_private->int_ctrl = 0x00;
495 outb(value: dev_private->int_ctrl, port: dev->iobase + PCI173X_INT_EN_REG);
496 /* Reset all 4 Int Flags */
497 outb(value: 0x0f, port: dev->iobase + PCI173X_INT_CLR_REG);
498 /* Rising Edge => IRQ . On all 4 Pins */
499 dev_private->int_rf = 0x00;
500 outb(value: dev_private->int_rf, port: dev->iobase + PCI173X_INT_RF_REG);
501 break;
502 case TYPE_PCI1739:
503 case TYPE_PCI1750:
504 case TYPE_PCI1751:
505 outb(value: 0x88, port: dev->iobase + PCI1750_INT_REG);
506 break;
507 case TYPE_PCI1753:
508 case TYPE_PCI1753E:
509 outb(value: 0x88, port: dev->iobase + PCI1753_INT_REG(0));
510 outb(value: 0x80, port: dev->iobase + PCI1753_INT_REG(1));
511 outb(value: 0x80, port: dev->iobase + PCI1753_INT_REG(2));
512 outb(value: 0x80, port: dev->iobase + PCI1753_INT_REG(3));
513 if (cardtype == TYPE_PCI1753E) {
514 outb(value: 0x88, port: dev->iobase + PCI1753E_INT_REG(0));
515 outb(value: 0x80, port: dev->iobase + PCI1753E_INT_REG(1));
516 outb(value: 0x80, port: dev->iobase + PCI1753E_INT_REG(2));
517 outb(value: 0x80, port: dev->iobase + PCI1753E_INT_REG(3));
518 }
519 break;
520 case TYPE_PCI1754:
521 case TYPE_PCI1756:
522 outw(value: 0x08, port: dev->iobase + PCI1754_INT_REG(0));
523 outw(value: 0x08, port: dev->iobase + PCI1754_INT_REG(1));
524 if (cardtype == TYPE_PCI1754) {
525 outw(value: 0x08, port: dev->iobase + PCI1754_INT_REG(2));
526 outw(value: 0x08, port: dev->iobase + PCI1754_INT_REG(3));
527 }
528 break;
529 case TYPE_PCI1761:
530 /* disable interrupts */
531 outb(value: 0, port: dev->iobase + PCI1761_INT_EN_REG);
532 /* clear interrupts */
533 outb(value: 0xff, port: dev->iobase + PCI1761_INT_CLR_REG);
534 /* set rising edge trigger */
535 outb(value: 0, port: dev->iobase + PCI1761_INT_RF_REG);
536 break;
537 case TYPE_PCI1762:
538 outw(value: 0x0101, port: dev->iobase + PCI1762_INT_REG);
539 break;
540 default:
541 break;
542 }
543
544 return 0;
545}
546
547static int pci_dio_auto_attach(struct comedi_device *dev,
548 unsigned long context)
549{
550 struct pci_dev *pcidev = comedi_to_pci_dev(dev);
551 const struct dio_boardtype *board = NULL;
552 struct comedi_subdevice *s;
553 struct pci_dio_dev_private_data *dev_private;
554 int ret, subdev, i, j;
555
556 if (context < ARRAY_SIZE(boardtypes))
557 board = &boardtypes[context];
558 if (!board)
559 return -ENODEV;
560 dev->board_ptr = board;
561 dev->board_name = board->name;
562
563 dev_private = comedi_alloc_devpriv(dev, size: sizeof(*dev_private));
564 if (!dev_private)
565 return -ENOMEM;
566
567 ret = comedi_pci_enable(dev);
568 if (ret)
569 return ret;
570 if (context == TYPE_PCI1736)
571 dev->iobase = pci_resource_start(pcidev, 0);
572 else
573 dev->iobase = pci_resource_start(pcidev, 2);
574
575 dev_private->boardtype = context;
576 pci_dio_reset(dev, cardtype: context);
577
578 /* request IRQ if device has irq subdevices */
579 if (board->sdirq[0].int_en && pcidev->irq) {
580 ret = request_irq(irq: pcidev->irq, handler: pci_dio_interrupt, IRQF_SHARED,
581 name: dev->board_name, dev);
582 if (ret == 0)
583 dev->irq = pcidev->irq;
584 }
585
586 ret = comedi_alloc_subdevices(dev, num_subdevices: board->nsubdevs);
587 if (ret)
588 return ret;
589
590 subdev = 0;
591 for (i = 0; i < PCI_DIO_MAX_DI_SUBDEVS; i++) {
592 const struct diosubd_data *d = &board->sdi[i];
593
594 if (d->chans) {
595 s = &dev->subdevices[subdev++];
596 s->type = COMEDI_SUBD_DI;
597 s->subdev_flags = SDF_READABLE;
598 s->n_chan = d->chans;
599 s->maxdata = 1;
600 s->range_table = &range_digital;
601 s->insn_bits = board->is_16bit
602 ? pci_dio_insn_bits_di_w
603 : pci_dio_insn_bits_di_b;
604 s->private = (void *)d->addr;
605 }
606 }
607
608 for (i = 0; i < PCI_DIO_MAX_DO_SUBDEVS; i++) {
609 const struct diosubd_data *d = &board->sdo[i];
610
611 if (d->chans) {
612 s = &dev->subdevices[subdev++];
613 s->type = COMEDI_SUBD_DO;
614 s->subdev_flags = SDF_WRITABLE;
615 s->n_chan = d->chans;
616 s->maxdata = 1;
617 s->range_table = &range_digital;
618 s->insn_bits = board->is_16bit
619 ? pci_dio_insn_bits_do_w
620 : pci_dio_insn_bits_do_b;
621 s->private = (void *)d->addr;
622
623 /* reset all outputs to 0 */
624 if (board->is_16bit) {
625 outw(value: 0, port: dev->iobase + d->addr);
626 if (s->n_chan > 16)
627 outw(value: 0, port: dev->iobase + d->addr + 2);
628 } else {
629 outb(value: 0, port: dev->iobase + d->addr);
630 if (s->n_chan > 8)
631 outb(value: 0, port: dev->iobase + d->addr + 1);
632 if (s->n_chan > 16)
633 outb(value: 0, port: dev->iobase + d->addr + 2);
634 if (s->n_chan > 24)
635 outb(value: 0, port: dev->iobase + d->addr + 3);
636 }
637 }
638 }
639
640 for (i = 0; i < PCI_DIO_MAX_DIO_SUBDEVG; i++) {
641 const struct diosubd_data *d = &board->sdio[i];
642
643 for (j = 0; j < d->chans; j++) {
644 s = &dev->subdevices[subdev++];
645 ret = subdev_8255_io_init(dev, s,
646 regbase: d->addr + j * I8255_SIZE);
647 if (ret)
648 return ret;
649 }
650 }
651
652 if (board->id_reg) {
653 s = &dev->subdevices[subdev++];
654 s->type = COMEDI_SUBD_DI;
655 s->subdev_flags = SDF_READABLE | SDF_INTERNAL;
656 s->n_chan = 4;
657 s->maxdata = 1;
658 s->range_table = &range_digital;
659 s->insn_bits = board->is_16bit ? pci_dio_insn_bits_di_w
660 : pci_dio_insn_bits_di_b;
661 s->private = (void *)board->id_reg;
662 }
663
664 if (board->timer_regbase) {
665 s = &dev->subdevices[subdev++];
666
667 dev->pacer =
668 comedi_8254_io_alloc(iobase: dev->iobase + board->timer_regbase,
669 osc_base: 0, I8254_IO8, regshift: 0);
670 if (IS_ERR(ptr: dev->pacer))
671 return PTR_ERR(ptr: dev->pacer);
672
673 comedi_8254_subdevice_init(s, i8254: dev->pacer);
674 }
675
676 dev_private->irq_subd = subdev; /* first interrupt subdevice index */
677 for (i = 0; i < PCI_DIO_MAX_IRQ_SUBDEVS; ++i) {
678 struct pci_dio_sd_private_data *sd_priv = NULL;
679 const struct dio_irq_subd_data *d = &board->sdirq[i];
680
681 if (d->int_en) {
682 s = &dev->subdevices[subdev++];
683 s->type = COMEDI_SUBD_DI;
684 s->subdev_flags = SDF_READABLE;
685 s->n_chan = 1;
686 s->maxdata = 1;
687 s->range_table = &range_digital;
688 s->insn_bits = pci_dio_insn_bits_dirq_b;
689 sd_priv = comedi_alloc_spriv(s, size: sizeof(*sd_priv));
690 if (!sd_priv)
691 return -ENOMEM;
692
693 spin_lock_init(&sd_priv->subd_slock);
694 sd_priv->port_offset = d->addr;
695 sd_priv->cmd_running = 0;
696
697 if (dev->irq) {
698 dev->read_subdev = s;
699 s->type = COMEDI_SUBD_DI;
700 s->subdev_flags = SDF_READABLE | SDF_CMD_READ;
701 s->len_chanlist = 1;
702 s->do_cmdtest = pci_dio_asy_cmdtest;
703 s->do_cmd = pci_dio_asy_cmd;
704 s->cancel = pci_dio_asy_cancel;
705 }
706 }
707 }
708
709 return 0;
710}
711
712static void pci_dio_detach(struct comedi_device *dev)
713{
714 struct pci_dio_dev_private_data *dev_private = dev->private;
715 int boardtype = dev_private->boardtype;
716
717 if (dev->iobase)
718 pci_dio_reset(dev, cardtype: boardtype);
719 comedi_pci_detach(dev);
720}
721
722static struct comedi_driver adv_pci_dio_driver = {
723 .driver_name = "adv_pci_dio",
724 .module = THIS_MODULE,
725 .auto_attach = pci_dio_auto_attach,
726 .detach = pci_dio_detach,
727};
728
729static unsigned long pci_dio_override_cardtype(struct pci_dev *pcidev,
730 unsigned long cardtype)
731{
732 /*
733 * Change cardtype from TYPE_PCI1753 to TYPE_PCI1753E if expansion
734 * board available. Need to enable PCI device and request the main
735 * registers PCI BAR temporarily to perform the test.
736 */
737 if (cardtype != TYPE_PCI1753)
738 return cardtype;
739 if (pci_enable_device(dev: pcidev) < 0)
740 return cardtype;
741 if (pci_request_region(pcidev, 2, "adv_pci_dio") == 0) {
742 /*
743 * This test is based on Advantech's "advdaq" driver source
744 * (which declares its module licence as "GPL" although the
745 * driver source does not include a "COPYING" file).
746 */
747 unsigned long reg = pci_resource_start(pcidev, 2) + 53;
748
749 outb(value: 0x05, port: reg);
750 if ((inb(port: reg) & 0x07) == 0x02) {
751 outb(value: 0x02, port: reg);
752 if ((inb(port: reg) & 0x07) == 0x05)
753 cardtype = TYPE_PCI1753E;
754 }
755 pci_release_region(pcidev, 2);
756 }
757 pci_disable_device(dev: pcidev);
758 return cardtype;
759}
760
761static int adv_pci_dio_pci_probe(struct pci_dev *dev,
762 const struct pci_device_id *id)
763{
764 unsigned long cardtype;
765
766 cardtype = pci_dio_override_cardtype(pcidev: dev, cardtype: id->driver_data);
767 return comedi_pci_auto_config(pcidev: dev, driver: &adv_pci_dio_driver, context: cardtype);
768}
769
770static const struct pci_device_id adv_pci_dio_pci_table[] = {
771 { PCI_VDEVICE(ADVANTECH, 0x1730), TYPE_PCI1730 },
772 { PCI_VDEVICE(ADVANTECH, 0x1733), TYPE_PCI1733 },
773 { PCI_VDEVICE(ADVANTECH, 0x1734), TYPE_PCI1734 },
774 { PCI_VDEVICE(ADVANTECH, 0x1735), TYPE_PCI1735 },
775 { PCI_VDEVICE(ADVANTECH, 0x1736), TYPE_PCI1736 },
776 { PCI_VDEVICE(ADVANTECH, 0x1739), TYPE_PCI1739 },
777 { PCI_VDEVICE(ADVANTECH, 0x1750), TYPE_PCI1750 },
778 { PCI_VDEVICE(ADVANTECH, 0x1751), TYPE_PCI1751 },
779 { PCI_VDEVICE(ADVANTECH, 0x1752), TYPE_PCI1752 },
780 { PCI_VDEVICE(ADVANTECH, 0x1753), TYPE_PCI1753 },
781 { PCI_VDEVICE(ADVANTECH, 0x1754), TYPE_PCI1754 },
782 { PCI_VDEVICE(ADVANTECH, 0x1756), TYPE_PCI1756 },
783 { PCI_VDEVICE(ADVANTECH, 0x1761), TYPE_PCI1761 },
784 { PCI_VDEVICE(ADVANTECH, 0x1762), TYPE_PCI1762 },
785 { 0 }
786};
787MODULE_DEVICE_TABLE(pci, adv_pci_dio_pci_table);
788
789static struct pci_driver adv_pci_dio_pci_driver = {
790 .name = "adv_pci_dio",
791 .id_table = adv_pci_dio_pci_table,
792 .probe = adv_pci_dio_pci_probe,
793 .remove = comedi_pci_auto_unconfig,
794};
795module_comedi_pci_driver(adv_pci_dio_driver, adv_pci_dio_pci_driver);
796
797MODULE_AUTHOR("Comedi https://www.comedi.org");
798MODULE_DESCRIPTION("Comedi driver for Advantech Digital I/O Cards");
799MODULE_LICENSE("GPL");
800

source code of linux/drivers/comedi/drivers/adv_pci_dio.c