Commit | Line | Data |
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6a5c8664 IA |
1 | /* |
2 | comedi/drivers/amplc_pc236.c | |
3 | Driver for Amplicon PC36AT and PCI236 DIO boards. | |
4 | ||
5 | Copyright (C) 2002 MEV Ltd. <http://www.mev.co.uk/> | |
6 | ||
7 | COMEDI - Linux Control and Measurement Device Interface | |
8 | Copyright (C) 2000 David A. Schleef <ds@schleef.org> | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program; if not, write to the Free Software | |
22 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | ||
24 | */ | |
25 | /* | |
26 | Driver: amplc_pc236 | |
27 | Description: Amplicon PC36AT, PCI236 | |
28 | Author: Ian Abbott <abbotti@mev.co.uk> | |
29 | Devices: [Amplicon] PC36AT (pc36at), PCI236 (pci236 or amplc_pc236) | |
0d6e5dad | 30 | Updated: Wed, 01 Apr 2009 15:41:25 +0100 |
6a5c8664 IA |
31 | Status: works |
32 | ||
33 | Configuration options - PC36AT: | |
34 | [0] - I/O port base address | |
35 | [1] - IRQ (optional) | |
36 | ||
37 | Configuration options - PCI236: | |
38 | [0] - PCI bus of device (optional) | |
39 | [1] - PCI slot of device (optional) | |
40 | If bus/slot is not specified, the first available PCI device will be | |
41 | used. | |
42 | ||
43 | The PC36AT ISA board and PCI236 PCI board have a single 8255 appearing | |
44 | as subdevice 0. | |
45 | ||
46 | Subdevice 1 pretends to be a digital input device, but it always returns | |
47 | 0 when read. However, if you run a command with scan_begin_src=TRIG_EXT, | |
0d6e5dad | 48 | a rising edge on port C bit 3 acts as an external trigger, which can be |
6a5c8664 IA |
49 | used to wake up tasks. This is like the comedi_parport device, but the |
50 | only way to physically disable the interrupt on the PC36AT is to remove | |
51 | the IRQ jumper. If no interrupt is connected, then subdevice 1 is | |
52 | unused. | |
53 | */ | |
54 | ||
70265d24 JS |
55 | #include <linux/interrupt.h> |
56 | ||
6a5c8664 IA |
57 | #include "../comedidev.h" |
58 | ||
59 | #include "comedi_pci.h" | |
60 | ||
61 | #include "8255.h" | |
62 | #include "plx9052.h" | |
63 | ||
64 | #define PC236_DRIVER_NAME "amplc_pc236" | |
65 | ||
66 | /* PCI236 PCI configuration register information */ | |
67 | #define PCI_VENDOR_ID_AMPLICON 0x14dc | |
68 | #define PCI_DEVICE_ID_AMPLICON_PCI236 0x0009 | |
69 | #define PCI_DEVICE_ID_INVALID 0xffff | |
70 | ||
71 | /* PC36AT / PCI236 registers */ | |
72 | ||
73 | #define PC236_IO_SIZE 4 | |
74 | #define PC236_LCR_IO_SIZE 128 | |
75 | ||
76 | /* | |
77 | * INTCSR values for PCI236. | |
78 | */ | |
79 | /* Disable interrupt, also clear any interrupt there */ | |
53106ae6 | 80 | #define PCI236_INTR_DISABLE (PLX9052_INTCSR_LI1ENAB_DISABLED \ |
6a5c8664 IA |
81 | | PLX9052_INTCSR_LI1POL_HIGH \ |
82 | | PLX9052_INTCSR_LI2POL_HIGH \ | |
83 | | PLX9052_INTCSR_PCIENAB_DISABLED \ | |
84 | | PLX9052_INTCSR_LI1SEL_EDGE \ | |
53106ae6 | 85 | | PLX9052_INTCSR_LI1CLRINT_ASSERTED) |
6a5c8664 | 86 | /* Enable interrupt, also clear any interrupt there. */ |
53106ae6 | 87 | #define PCI236_INTR_ENABLE (PLX9052_INTCSR_LI1ENAB_ENABLED \ |
6a5c8664 IA |
88 | | PLX9052_INTCSR_LI1POL_HIGH \ |
89 | | PLX9052_INTCSR_LI2POL_HIGH \ | |
90 | | PLX9052_INTCSR_PCIENAB_ENABLED \ | |
91 | | PLX9052_INTCSR_LI1SEL_EDGE \ | |
53106ae6 | 92 | | PLX9052_INTCSR_LI1CLRINT_ASSERTED) |
6a5c8664 IA |
93 | |
94 | /* | |
95 | * Board descriptions for Amplicon PC36AT and PCI236. | |
96 | */ | |
97 | ||
98 | enum pc236_bustype { isa_bustype, pci_bustype }; | |
99 | enum pc236_model { pc36at_model, pci236_model, anypci_model }; | |
100 | ||
57ad8696 | 101 | struct pc236_board { |
6a5c8664 IA |
102 | const char *name; |
103 | const char *fancy_name; | |
104 | unsigned short devid; | |
105 | enum pc236_bustype bustype; | |
106 | enum pc236_model model; | |
57ad8696 BP |
107 | }; |
108 | static const struct pc236_board pc236_boards[] = { | |
6a5c8664 | 109 | { |
68c3dbff BP |
110 | .name = "pc36at", |
111 | .fancy_name = "PC36AT", | |
112 | .bustype = isa_bustype, | |
113 | .model = pc36at_model, | |
6a5c8664 IA |
114 | }, |
115 | #ifdef CONFIG_COMEDI_PCI | |
116 | { | |
68c3dbff BP |
117 | .name = "pci236", |
118 | .fancy_name = "PCI236", | |
119 | .devid = PCI_DEVICE_ID_AMPLICON_PCI236, | |
120 | .bustype = pci_bustype, | |
121 | .model = pci236_model, | |
6a5c8664 IA |
122 | }, |
123 | #endif | |
124 | #ifdef CONFIG_COMEDI_PCI | |
125 | { | |
68c3dbff BP |
126 | .name = PC236_DRIVER_NAME, |
127 | .fancy_name = PC236_DRIVER_NAME, | |
128 | .devid = PCI_DEVICE_ID_INVALID, | |
129 | .bustype = pci_bustype, | |
130 | .model = anypci_model, /* wildcard */ | |
6a5c8664 IA |
131 | }, |
132 | #endif | |
133 | }; | |
134 | ||
135 | #ifdef CONFIG_COMEDI_PCI | |
136 | static DEFINE_PCI_DEVICE_TABLE(pc236_pci_table) = { | |
137 | {PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI236, PCI_ANY_ID, | |
138 | PCI_ANY_ID, 0, 0, 0}, | |
139 | {0} | |
140 | }; | |
141 | ||
142 | MODULE_DEVICE_TABLE(pci, pc236_pci_table); | |
143 | #endif /* CONFIG_COMEDI_PCI */ | |
144 | ||
145 | /* | |
146 | * Useful for shorthand access to the particular board structure | |
147 | */ | |
57ad8696 | 148 | #define thisboard ((const struct pc236_board *)dev->board_ptr) |
6a5c8664 IA |
149 | |
150 | /* this structure is for data unique to this hardware driver. If | |
151 | several hardware drivers keep similar information in this structure, | |
71b5f4f1 | 152 | feel free to suggest moving the variable to the struct comedi_device struct. */ |
f1ee810a | 153 | struct pc236_private { |
6a5c8664 IA |
154 | #ifdef CONFIG_COMEDI_PCI |
155 | /* PCI device */ | |
156 | struct pci_dev *pci_dev; | |
157 | unsigned long lcr_iobase; /* PLX PCI9052 config registers in PCIBAR1 */ | |
158 | #endif | |
159 | int enable_irq; | |
f1ee810a | 160 | }; |
6a5c8664 | 161 | |
f1ee810a | 162 | #define devpriv ((struct pc236_private *)dev->private) |
6a5c8664 IA |
163 | |
164 | /* | |
139dfbdf | 165 | * The struct comedi_driver structure tells the Comedi core module |
6a5c8664 IA |
166 | * which functions to call to configure/deconfigure (attach/detach) |
167 | * the board, and also about the kernel module that contains | |
168 | * the device code. | |
169 | */ | |
da91b269 BP |
170 | static int pc236_attach(struct comedi_device *dev, struct comedi_devconfig *it); |
171 | static int pc236_detach(struct comedi_device *dev); | |
139dfbdf | 172 | static struct comedi_driver driver_amplc_pc236 = { |
68c3dbff BP |
173 | .driver_name = PC236_DRIVER_NAME, |
174 | .module = THIS_MODULE, | |
175 | .attach = pc236_attach, | |
176 | .detach = pc236_detach, | |
177 | .board_name = &pc236_boards[0].name, | |
178 | .offset = sizeof(struct pc236_board), | |
8629efa4 | 179 | .num_names = ARRAY_SIZE(pc236_boards), |
6a5c8664 IA |
180 | }; |
181 | ||
182 | #ifdef CONFIG_COMEDI_PCI | |
183 | COMEDI_PCI_INITCLEANUP(driver_amplc_pc236, pc236_pci_table); | |
184 | #else | |
185 | COMEDI_INITCLEANUP(driver_amplc_pc236); | |
186 | #endif | |
187 | ||
188 | static int pc236_request_region(unsigned minor, unsigned long from, | |
189 | unsigned long extent); | |
814900c9 BP |
190 | static void pc236_intr_disable(struct comedi_device *dev); |
191 | static void pc236_intr_enable(struct comedi_device *dev); | |
192 | static int pc236_intr_check(struct comedi_device *dev); | |
193 | static int pc236_intr_insn(struct comedi_device *dev, struct comedi_subdevice *s, | |
194 | struct comedi_insn *insn, unsigned int *data); | |
195 | static int pc236_intr_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s, | |
196 | struct comedi_cmd *cmd); | |
197 | static int pc236_intr_cmd(struct comedi_device *dev, struct comedi_subdevice *s); | |
198 | static int pc236_intr_cancel(struct comedi_device *dev, struct comedi_subdevice *s); | |
70265d24 | 199 | static irqreturn_t pc236_interrupt(int irq, void *d); |
6a5c8664 IA |
200 | |
201 | /* | |
202 | * This function looks for a PCI device matching the requested board name, | |
203 | * bus and slot. | |
204 | */ | |
205 | #ifdef CONFIG_COMEDI_PCI | |
206 | static int | |
da91b269 | 207 | pc236_find_pci(struct comedi_device *dev, int bus, int slot, |
6a5c8664 IA |
208 | struct pci_dev **pci_dev_p) |
209 | { | |
210 | struct pci_dev *pci_dev = NULL; | |
211 | ||
212 | *pci_dev_p = NULL; | |
213 | ||
214 | /* Look for matching PCI device. */ | |
215 | for (pci_dev = pci_get_device(PCI_VENDOR_ID_AMPLICON, PCI_ANY_ID, NULL); | |
216 | pci_dev != NULL; | |
217 | pci_dev = pci_get_device(PCI_VENDOR_ID_AMPLICON, | |
218 | PCI_ANY_ID, pci_dev)) { | |
219 | /* If bus/slot specified, check them. */ | |
220 | if (bus || slot) { | |
221 | if (bus != pci_dev->bus->number | |
222 | || slot != PCI_SLOT(pci_dev->devfn)) | |
223 | continue; | |
224 | } | |
225 | if (thisboard->model == anypci_model) { | |
226 | /* Match any supported model. */ | |
227 | int i; | |
228 | ||
229 | for (i = 0; i < ARRAY_SIZE(pc236_boards); i++) { | |
230 | if (pc236_boards[i].bustype != pci_bustype) | |
231 | continue; | |
232 | if (pci_dev->device == pc236_boards[i].devid) { | |
233 | /* Change board_ptr to matched board. */ | |
234 | dev->board_ptr = &pc236_boards[i]; | |
235 | break; | |
236 | } | |
237 | } | |
238 | if (i == ARRAY_SIZE(pc236_boards)) | |
239 | continue; | |
240 | } else { | |
241 | /* Match specific model name. */ | |
242 | if (pci_dev->device != thisboard->devid) | |
243 | continue; | |
244 | } | |
245 | ||
246 | /* Found a match. */ | |
247 | *pci_dev_p = pci_dev; | |
248 | return 0; | |
249 | } | |
250 | /* No match found. */ | |
251 | if (bus || slot) { | |
252 | printk(KERN_ERR | |
253 | "comedi%d: error! no %s found at pci %02x:%02x!\n", | |
254 | dev->minor, thisboard->name, bus, slot); | |
255 | } else { | |
256 | printk(KERN_ERR "comedi%d: error! no %s found!\n", | |
257 | dev->minor, thisboard->name); | |
258 | } | |
259 | return -EIO; | |
260 | } | |
261 | #endif | |
262 | ||
263 | /* | |
264 | * Attach is called by the Comedi core to configure the driver | |
265 | * for a particular board. If you specified a board_name array | |
266 | * in the driver structure, dev->board_ptr contains that | |
267 | * address. | |
268 | */ | |
da91b269 | 269 | static int pc236_attach(struct comedi_device *dev, struct comedi_devconfig *it) |
6a5c8664 | 270 | { |
34c43922 | 271 | struct comedi_subdevice *s; |
6a5c8664 IA |
272 | unsigned long iobase = 0; |
273 | unsigned int irq = 0; | |
274 | #ifdef CONFIG_COMEDI_PCI | |
275 | struct pci_dev *pci_dev = NULL; | |
276 | int bus = 0, slot = 0; | |
277 | #endif | |
278 | int share_irq = 0; | |
279 | int ret; | |
280 | ||
281 | printk(KERN_DEBUG "comedi%d: %s: attach\n", dev->minor, | |
282 | PC236_DRIVER_NAME); | |
283 | /* | |
284 | * Allocate the private structure area. alloc_private() is a | |
285 | * convenient macro defined in comedidev.h. | |
286 | */ | |
c3744138 BP |
287 | ret = alloc_private(dev, sizeof(struct pc236_private)); |
288 | if (ret < 0) { | |
6a5c8664 IA |
289 | printk(KERN_ERR "comedi%d: error! out of memory!\n", |
290 | dev->minor); | |
291 | return ret; | |
292 | } | |
293 | /* Process options. */ | |
294 | switch (thisboard->bustype) { | |
295 | case isa_bustype: | |
296 | iobase = it->options[0]; | |
297 | irq = it->options[1]; | |
298 | share_irq = 0; | |
299 | break; | |
300 | #ifdef CONFIG_COMEDI_PCI | |
301 | case pci_bustype: | |
302 | bus = it->options[0]; | |
303 | slot = it->options[1]; | |
304 | share_irq = 1; | |
305 | ||
c3744138 BP |
306 | ret = pc236_find_pci(dev, bus, slot, &pci_dev); |
307 | if (ret < 0) | |
6a5c8664 IA |
308 | return ret; |
309 | devpriv->pci_dev = pci_dev; | |
310 | break; | |
311 | #endif /* CONFIG_COMEDI_PCI */ | |
312 | default: | |
313 | printk(KERN_ERR | |
314 | "comedi%d: %s: BUG! cannot determine board type!\n", | |
315 | dev->minor, PC236_DRIVER_NAME); | |
316 | return -EINVAL; | |
317 | break; | |
318 | } | |
319 | ||
320 | /* | |
321 | * Initialize dev->board_name. | |
322 | */ | |
323 | dev->board_name = thisboard->name; | |
324 | ||
325 | /* Enable device and reserve I/O spaces. */ | |
326 | #ifdef CONFIG_COMEDI_PCI | |
327 | if (pci_dev) { | |
c3744138 BP |
328 | |
329 | ret = comedi_pci_enable(pci_dev, PC236_DRIVER_NAME); | |
330 | if (ret < 0) { | |
6a5c8664 IA |
331 | printk(KERN_ERR |
332 | "comedi%d: error! cannot enable PCI device and request regions!\n", | |
333 | dev->minor); | |
334 | return ret; | |
335 | } | |
336 | devpriv->lcr_iobase = pci_resource_start(pci_dev, 1); | |
337 | iobase = pci_resource_start(pci_dev, 2); | |
338 | irq = pci_dev->irq; | |
339 | } else | |
340 | #endif | |
341 | { | |
342 | ret = pc236_request_region(dev->minor, iobase, PC236_IO_SIZE); | |
343 | if (ret < 0) { | |
344 | return ret; | |
345 | } | |
346 | } | |
347 | dev->iobase = iobase; | |
348 | ||
349 | /* | |
350 | * Allocate the subdevice structures. alloc_subdevice() is a | |
351 | * convenient macro defined in comedidev.h. | |
352 | */ | |
c3744138 BP |
353 | ret = alloc_subdevices(dev, 2); |
354 | if (ret < 0) { | |
6a5c8664 IA |
355 | printk(KERN_ERR "comedi%d: error! out of memory!\n", |
356 | dev->minor); | |
357 | return ret; | |
358 | } | |
359 | ||
360 | s = dev->subdevices + 0; | |
361 | /* digital i/o subdevice (8255) */ | |
c3744138 BP |
362 | ret = subdev_8255_init(dev, s, NULL, iobase); |
363 | if (ret < 0) { | |
6a5c8664 IA |
364 | printk(KERN_ERR "comedi%d: error! out of memory!\n", |
365 | dev->minor); | |
366 | return ret; | |
367 | } | |
368 | s = dev->subdevices + 1; | |
369 | dev->read_subdev = s; | |
370 | s->type = COMEDI_SUBD_UNUSED; | |
371 | pc236_intr_disable(dev); | |
372 | if (irq) { | |
373 | unsigned long flags = share_irq ? IRQF_SHARED : 0; | |
374 | ||
375 | if (comedi_request_irq(irq, pc236_interrupt, flags, | |
376 | PC236_DRIVER_NAME, dev) >= 0) { | |
377 | dev->irq = irq; | |
378 | s->type = COMEDI_SUBD_DI; | |
379 | s->subdev_flags = SDF_READABLE | SDF_CMD_READ; | |
380 | s->n_chan = 1; | |
381 | s->maxdata = 1; | |
382 | s->range_table = &range_digital; | |
383 | s->insn_bits = pc236_intr_insn; | |
384 | s->do_cmdtest = pc236_intr_cmdtest; | |
385 | s->do_cmd = pc236_intr_cmd; | |
386 | s->cancel = pc236_intr_cancel; | |
387 | } | |
388 | } | |
389 | printk(KERN_INFO "comedi%d: %s ", dev->minor, dev->board_name); | |
390 | if (thisboard->bustype == isa_bustype) { | |
391 | printk("(base %#lx) ", iobase); | |
392 | } else { | |
393 | #ifdef CONFIG_COMEDI_PCI | |
394 | printk("(pci %s) ", pci_name(pci_dev)); | |
395 | #endif | |
396 | } | |
397 | if (irq) { | |
398 | printk("(irq %u%s) ", irq, (dev->irq ? "" : " UNAVAILABLE")); | |
399 | } else { | |
400 | printk("(no irq) "); | |
401 | } | |
402 | ||
403 | printk("attached\n"); | |
404 | ||
405 | return 1; | |
406 | } | |
407 | ||
408 | /* | |
409 | * _detach is called to deconfigure a device. It should deallocate | |
410 | * resources. | |
411 | * This function is also called when _attach() fails, so it should be | |
412 | * careful not to release resources that were not necessarily | |
413 | * allocated by _attach(). dev->private and dev->subdevices are | |
414 | * deallocated automatically by the core. | |
415 | */ | |
da91b269 | 416 | static int pc236_detach(struct comedi_device *dev) |
6a5c8664 IA |
417 | { |
418 | printk(KERN_DEBUG "comedi%d: %s: detach\n", dev->minor, | |
419 | PC236_DRIVER_NAME); | |
420 | if (devpriv) { | |
421 | pc236_intr_disable(dev); | |
422 | } | |
423 | if (dev->irq) | |
424 | comedi_free_irq(dev->irq, dev); | |
425 | if (dev->subdevices) { | |
426 | subdev_8255_cleanup(dev, dev->subdevices + 0); | |
427 | } | |
428 | if (devpriv) { | |
429 | #ifdef CONFIG_COMEDI_PCI | |
430 | if (devpriv->pci_dev) { | |
431 | if (dev->iobase) { | |
432 | comedi_pci_disable(devpriv->pci_dev); | |
433 | } | |
434 | pci_dev_put(devpriv->pci_dev); | |
435 | } else | |
436 | #endif | |
437 | { | |
438 | if (dev->iobase) { | |
439 | release_region(dev->iobase, PC236_IO_SIZE); | |
440 | } | |
441 | } | |
442 | } | |
443 | if (dev->board_name) { | |
444 | printk(KERN_INFO "comedi%d: %s removed\n", | |
445 | dev->minor, dev->board_name); | |
446 | } | |
447 | return 0; | |
448 | } | |
449 | ||
450 | /* | |
451 | * This function checks and requests an I/O region, reporting an error | |
452 | * if there is a conflict. | |
453 | */ | |
454 | static int pc236_request_region(unsigned minor, unsigned long from, | |
455 | unsigned long extent) | |
456 | { | |
457 | if (!from || !request_region(from, extent, PC236_DRIVER_NAME)) { | |
458 | printk(KERN_ERR "comedi%d: I/O port conflict (%#lx,%lu)!\n", | |
459 | minor, from, extent); | |
460 | return -EIO; | |
461 | } | |
462 | return 0; | |
463 | } | |
464 | ||
465 | /* | |
466 | * This function is called to mark the interrupt as disabled (no command | |
467 | * configured on subdevice 1) and to physically disable the interrupt | |
468 | * (not possible on the PC36AT, except by removing the IRQ jumper!). | |
469 | */ | |
da91b269 | 470 | static void pc236_intr_disable(struct comedi_device *dev) |
6a5c8664 IA |
471 | { |
472 | unsigned long flags; | |
473 | ||
474 | comedi_spin_lock_irqsave(&dev->spinlock, flags); | |
475 | devpriv->enable_irq = 0; | |
476 | #ifdef CONFIG_COMEDI_PCI | |
477 | if (devpriv->lcr_iobase) | |
478 | outl(PCI236_INTR_DISABLE, devpriv->lcr_iobase + PLX9052_INTCSR); | |
479 | #endif | |
480 | comedi_spin_unlock_irqrestore(&dev->spinlock, flags); | |
481 | } | |
482 | ||
483 | /* | |
484 | * This function is called to mark the interrupt as enabled (a command | |
485 | * configured on subdevice 1) and to physically enable the interrupt | |
486 | * (not possible on the PC36AT, except by (re)connecting the IRQ jumper!). | |
487 | */ | |
da91b269 | 488 | static void pc236_intr_enable(struct comedi_device *dev) |
6a5c8664 IA |
489 | { |
490 | unsigned long flags; | |
491 | ||
492 | comedi_spin_lock_irqsave(&dev->spinlock, flags); | |
493 | devpriv->enable_irq = 1; | |
494 | #ifdef CONFIG_COMEDI_PCI | |
495 | if (devpriv->lcr_iobase) | |
496 | outl(PCI236_INTR_ENABLE, devpriv->lcr_iobase + PLX9052_INTCSR); | |
497 | #endif | |
498 | comedi_spin_unlock_irqrestore(&dev->spinlock, flags); | |
499 | } | |
500 | ||
501 | /* | |
502 | * This function is called when an interrupt occurs to check whether | |
503 | * the interrupt has been marked as enabled and was generated by the | |
504 | * board. If so, the function prepares the hardware for the next | |
505 | * interrupt. | |
506 | * Returns 0 if the interrupt should be ignored. | |
507 | */ | |
da91b269 | 508 | static int pc236_intr_check(struct comedi_device *dev) |
6a5c8664 IA |
509 | { |
510 | int retval = 0; | |
511 | unsigned long flags; | |
512 | ||
513 | comedi_spin_lock_irqsave(&dev->spinlock, flags); | |
514 | if (devpriv->enable_irq) { | |
515 | retval = 1; | |
516 | #ifdef CONFIG_COMEDI_PCI | |
517 | if (devpriv->lcr_iobase) { | |
518 | if ((inl(devpriv->lcr_iobase + PLX9052_INTCSR) | |
519 | & PLX9052_INTCSR_LI1STAT_MASK) | |
520 | == PLX9052_INTCSR_LI1STAT_INACTIVE) { | |
521 | retval = 0; | |
522 | } else { | |
523 | /* Clear interrupt and keep it enabled. */ | |
524 | outl(PCI236_INTR_ENABLE, | |
525 | devpriv->lcr_iobase + PLX9052_INTCSR); | |
526 | } | |
527 | } | |
528 | #endif | |
529 | } | |
530 | comedi_spin_unlock_irqrestore(&dev->spinlock, flags); | |
531 | ||
532 | return retval; | |
533 | } | |
534 | ||
535 | /* | |
536 | * Input from subdevice 1. | |
537 | * Copied from the comedi_parport driver. | |
538 | */ | |
da91b269 BP |
539 | static int pc236_intr_insn(struct comedi_device *dev, struct comedi_subdevice *s, |
540 | struct comedi_insn *insn, unsigned int *data) | |
6a5c8664 IA |
541 | { |
542 | data[1] = 0; | |
543 | return 2; | |
544 | } | |
545 | ||
546 | /* | |
547 | * Subdevice 1 command test. | |
548 | * Copied from the comedi_parport driver. | |
549 | */ | |
da91b269 BP |
550 | static int pc236_intr_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s, |
551 | struct comedi_cmd *cmd) | |
6a5c8664 IA |
552 | { |
553 | int err = 0; | |
554 | int tmp; | |
555 | ||
556 | /* step 1 */ | |
557 | ||
558 | tmp = cmd->start_src; | |
559 | cmd->start_src &= TRIG_NOW; | |
560 | if (!cmd->start_src || tmp != cmd->start_src) | |
561 | err++; | |
562 | ||
563 | tmp = cmd->scan_begin_src; | |
564 | cmd->scan_begin_src &= TRIG_EXT; | |
565 | if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src) | |
566 | err++; | |
567 | ||
568 | tmp = cmd->convert_src; | |
569 | cmd->convert_src &= TRIG_FOLLOW; | |
570 | if (!cmd->convert_src || tmp != cmd->convert_src) | |
571 | err++; | |
572 | ||
573 | tmp = cmd->scan_end_src; | |
574 | cmd->scan_end_src &= TRIG_COUNT; | |
575 | if (!cmd->scan_end_src || tmp != cmd->scan_end_src) | |
576 | err++; | |
577 | ||
578 | tmp = cmd->stop_src; | |
579 | cmd->stop_src &= TRIG_NONE; | |
580 | if (!cmd->stop_src || tmp != cmd->stop_src) | |
581 | err++; | |
582 | ||
583 | if (err) | |
584 | return 1; | |
585 | ||
586 | /* step 2: ignored */ | |
587 | ||
588 | if (err) | |
589 | return 2; | |
590 | ||
591 | /* step 3: */ | |
592 | ||
593 | if (cmd->start_arg != 0) { | |
594 | cmd->start_arg = 0; | |
595 | err++; | |
596 | } | |
597 | if (cmd->scan_begin_arg != 0) { | |
598 | cmd->scan_begin_arg = 0; | |
599 | err++; | |
600 | } | |
601 | if (cmd->convert_arg != 0) { | |
602 | cmd->convert_arg = 0; | |
603 | err++; | |
604 | } | |
605 | if (cmd->scan_end_arg != 1) { | |
606 | cmd->scan_end_arg = 1; | |
607 | err++; | |
608 | } | |
609 | if (cmd->stop_arg != 0) { | |
610 | cmd->stop_arg = 0; | |
611 | err++; | |
612 | } | |
613 | ||
614 | if (err) | |
615 | return 3; | |
616 | ||
617 | /* step 4: ignored */ | |
618 | ||
619 | if (err) | |
620 | return 4; | |
621 | ||
622 | return 0; | |
623 | } | |
624 | ||
625 | /* | |
626 | * Subdevice 1 command. | |
627 | */ | |
da91b269 | 628 | static int pc236_intr_cmd(struct comedi_device *dev, struct comedi_subdevice *s) |
6a5c8664 IA |
629 | { |
630 | pc236_intr_enable(dev); | |
631 | ||
632 | return 0; | |
633 | } | |
634 | ||
635 | /* | |
636 | * Subdevice 1 cancel command. | |
637 | */ | |
da91b269 | 638 | static int pc236_intr_cancel(struct comedi_device *dev, struct comedi_subdevice *s) |
6a5c8664 IA |
639 | { |
640 | pc236_intr_disable(dev); | |
641 | ||
642 | return 0; | |
643 | } | |
644 | ||
645 | /* | |
646 | * Interrupt service routine. | |
647 | * Based on the comedi_parport driver. | |
648 | */ | |
70265d24 | 649 | static irqreturn_t pc236_interrupt(int irq, void *d) |
6a5c8664 | 650 | { |
71b5f4f1 | 651 | struct comedi_device *dev = d; |
34c43922 | 652 | struct comedi_subdevice *s = dev->subdevices + 1; |
6a5c8664 IA |
653 | int handled; |
654 | ||
655 | handled = pc236_intr_check(dev); | |
656 | if (dev->attached && handled) { | |
657 | comedi_buf_put(s->async, 0); | |
658 | s->async->events |= COMEDI_CB_BLOCK | COMEDI_CB_EOS; | |
659 | comedi_event(dev, s); | |
660 | } | |
661 | return IRQ_RETVAL(handled); | |
662 | } |