Commit | Line | Data |
---|---|---|
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 \ |
9f7a344b BA |
81 | | PLX9052_INTCSR_LI1POL_HIGH \ |
82 | | PLX9052_INTCSR_LI2POL_HIGH \ | |
83 | | PLX9052_INTCSR_PCIENAB_DISABLED \ | |
84 | | PLX9052_INTCSR_LI1SEL_EDGE \ | |
85 | | PLX9052_INTCSR_LI1CLRINT_ASSERTED) | |
6a5c8664 | 86 | /* Enable interrupt, also clear any interrupt there. */ |
53106ae6 | 87 | #define PCI236_INTR_ENABLE (PLX9052_INTCSR_LI1ENAB_ENABLED \ |
9f7a344b BA |
88 | | PLX9052_INTCSR_LI1POL_HIGH \ |
89 | | PLX9052_INTCSR_LI2POL_HIGH \ | |
90 | | PLX9052_INTCSR_PCIENAB_ENABLED \ | |
91 | | PLX9052_INTCSR_LI1SEL_EDGE \ | |
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 | { |
0a85b6f0 MT |
110 | .name = "pc36at", |
111 | .fancy_name = "PC36AT", | |
112 | .bustype = isa_bustype, | |
113 | .model = pc36at_model, | |
114 | }, | |
6a5c8664 IA |
115 | #ifdef CONFIG_COMEDI_PCI |
116 | { | |
0a85b6f0 MT |
117 | .name = "pci236", |
118 | .fancy_name = "PCI236", | |
119 | .devid = PCI_DEVICE_ID_AMPLICON_PCI236, | |
120 | .bustype = pci_bustype, | |
121 | .model = pci236_model, | |
122 | }, | |
6a5c8664 IA |
123 | #endif |
124 | #ifdef CONFIG_COMEDI_PCI | |
125 | { | |
0a85b6f0 MT |
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 */ | |
131 | }, | |
6a5c8664 IA |
132 | #endif |
133 | }; | |
134 | ||
135 | #ifdef CONFIG_COMEDI_PCI | |
136 | static DEFINE_PCI_DEVICE_TABLE(pc236_pci_table) = { | |
0a85b6f0 MT |
137 | { |
138 | PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI236, | |
139 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, { | |
140 | 0} | |
6a5c8664 IA |
141 | }; |
142 | ||
143 | MODULE_DEVICE_TABLE(pci, pc236_pci_table); | |
144 | #endif /* CONFIG_COMEDI_PCI */ | |
145 | ||
146 | /* | |
147 | * Useful for shorthand access to the particular board structure | |
148 | */ | |
57ad8696 | 149 | #define thisboard ((const struct pc236_board *)dev->board_ptr) |
6a5c8664 IA |
150 | |
151 | /* this structure is for data unique to this hardware driver. If | |
152 | several hardware drivers keep similar information in this structure, | |
9f7a344b BA |
153 | feel free to suggest moving the variable to the struct comedi_device struct. |
154 | */ | |
f1ee810a | 155 | struct pc236_private { |
6a5c8664 IA |
156 | #ifdef CONFIG_COMEDI_PCI |
157 | /* PCI device */ | |
158 | struct pci_dev *pci_dev; | |
9f7a344b | 159 | unsigned long lcr_iobase; /* PLX PCI9052 config registers in PCIBAR1 */ |
6a5c8664 IA |
160 | #endif |
161 | int enable_irq; | |
f1ee810a | 162 | }; |
6a5c8664 | 163 | |
f1ee810a | 164 | #define devpriv ((struct pc236_private *)dev->private) |
6a5c8664 IA |
165 | |
166 | /* | |
139dfbdf | 167 | * The struct comedi_driver structure tells the Comedi core module |
6a5c8664 IA |
168 | * which functions to call to configure/deconfigure (attach/detach) |
169 | * the board, and also about the kernel module that contains | |
170 | * the device code. | |
171 | */ | |
da91b269 BP |
172 | static int pc236_attach(struct comedi_device *dev, struct comedi_devconfig *it); |
173 | static int pc236_detach(struct comedi_device *dev); | |
139dfbdf | 174 | static struct comedi_driver driver_amplc_pc236 = { |
68c3dbff BP |
175 | .driver_name = PC236_DRIVER_NAME, |
176 | .module = THIS_MODULE, | |
177 | .attach = pc236_attach, | |
178 | .detach = pc236_detach, | |
179 | .board_name = &pc236_boards[0].name, | |
180 | .offset = sizeof(struct pc236_board), | |
8629efa4 | 181 | .num_names = ARRAY_SIZE(pc236_boards), |
6a5c8664 IA |
182 | }; |
183 | ||
184 | #ifdef CONFIG_COMEDI_PCI | |
727b286b AT |
185 | static int __devinit driver_amplc_pc236_pci_probe(struct pci_dev *dev, |
186 | const struct pci_device_id | |
187 | *ent) | |
188 | { | |
189 | return comedi_pci_auto_config(dev, driver_amplc_pc236.driver_name); | |
190 | } | |
191 | ||
192 | static void __devexit driver_amplc_pc236_pci_remove(struct pci_dev *dev) | |
193 | { | |
194 | comedi_pci_auto_unconfig(dev); | |
195 | } | |
196 | ||
197 | static struct pci_driver driver_amplc_pc236_pci_driver = { | |
198 | .id_table = pc236_pci_table, | |
199 | .probe = &driver_amplc_pc236_pci_probe, | |
200 | .remove = __devexit_p(&driver_amplc_pc236_pci_remove) | |
201 | }; | |
202 | ||
203 | static int __init driver_amplc_pc236_init_module(void) | |
204 | { | |
205 | int retval; | |
206 | ||
207 | retval = comedi_driver_register(&driver_amplc_pc236); | |
208 | if (retval < 0) | |
209 | return retval; | |
210 | ||
211 | driver_amplc_pc236_pci_driver.name = | |
212 | (char *)driver_amplc_pc236.driver_name; | |
213 | return pci_register_driver(&driver_amplc_pc236_pci_driver); | |
214 | } | |
215 | ||
216 | static void __exit driver_amplc_pc236_cleanup_module(void) | |
217 | { | |
218 | pci_unregister_driver(&driver_amplc_pc236_pci_driver); | |
219 | comedi_driver_unregister(&driver_amplc_pc236); | |
220 | } | |
221 | ||
222 | module_init(driver_amplc_pc236_init_module); | |
223 | module_exit(driver_amplc_pc236_cleanup_module); | |
6a5c8664 | 224 | #else |
7114a280 AT |
225 | static int __init driver_amplc_pc236_init_module(void) |
226 | { | |
227 | return comedi_driver_register(&driver_amplc_pc236); | |
228 | } | |
229 | ||
230 | static void __exit driver_amplc_pc236_cleanup_module(void) | |
231 | { | |
232 | comedi_driver_unregister(&driver_amplc_pc236); | |
233 | } | |
234 | ||
235 | module_init(driver_amplc_pc236_init_module); | |
236 | module_exit(driver_amplc_pc236_cleanup_module); | |
6a5c8664 IA |
237 | #endif |
238 | ||
239 | static int pc236_request_region(unsigned minor, unsigned long from, | |
0a85b6f0 | 240 | unsigned long extent); |
814900c9 BP |
241 | static void pc236_intr_disable(struct comedi_device *dev); |
242 | static void pc236_intr_enable(struct comedi_device *dev); | |
243 | static int pc236_intr_check(struct comedi_device *dev); | |
0a85b6f0 MT |
244 | static int pc236_intr_insn(struct comedi_device *dev, |
245 | struct comedi_subdevice *s, struct comedi_insn *insn, | |
246 | unsigned int *data); | |
247 | static int pc236_intr_cmdtest(struct comedi_device *dev, | |
248 | struct comedi_subdevice *s, | |
249 | struct comedi_cmd *cmd); | |
250 | static int pc236_intr_cmd(struct comedi_device *dev, | |
251 | struct comedi_subdevice *s); | |
252 | static int pc236_intr_cancel(struct comedi_device *dev, | |
253 | struct comedi_subdevice *s); | |
70265d24 | 254 | static irqreturn_t pc236_interrupt(int irq, void *d); |
6a5c8664 IA |
255 | |
256 | /* | |
257 | * This function looks for a PCI device matching the requested board name, | |
258 | * bus and slot. | |
259 | */ | |
260 | #ifdef CONFIG_COMEDI_PCI | |
261 | static int | |
da91b269 | 262 | pc236_find_pci(struct comedi_device *dev, int bus, int slot, |
0a85b6f0 | 263 | struct pci_dev **pci_dev_p) |
6a5c8664 IA |
264 | { |
265 | struct pci_dev *pci_dev = NULL; | |
266 | ||
267 | *pci_dev_p = NULL; | |
268 | ||
269 | /* Look for matching PCI device. */ | |
270 | for (pci_dev = pci_get_device(PCI_VENDOR_ID_AMPLICON, PCI_ANY_ID, NULL); | |
0a85b6f0 MT |
271 | pci_dev != NULL; |
272 | pci_dev = pci_get_device(PCI_VENDOR_ID_AMPLICON, | |
273 | PCI_ANY_ID, pci_dev)) { | |
6a5c8664 IA |
274 | /* If bus/slot specified, check them. */ |
275 | if (bus || slot) { | |
276 | if (bus != pci_dev->bus->number | |
0a85b6f0 | 277 | || slot != PCI_SLOT(pci_dev->devfn)) |
6a5c8664 IA |
278 | continue; |
279 | } | |
280 | if (thisboard->model == anypci_model) { | |
281 | /* Match any supported model. */ | |
282 | int i; | |
283 | ||
284 | for (i = 0; i < ARRAY_SIZE(pc236_boards); i++) { | |
285 | if (pc236_boards[i].bustype != pci_bustype) | |
286 | continue; | |
287 | if (pci_dev->device == pc236_boards[i].devid) { | |
288 | /* Change board_ptr to matched board. */ | |
289 | dev->board_ptr = &pc236_boards[i]; | |
290 | break; | |
291 | } | |
292 | } | |
293 | if (i == ARRAY_SIZE(pc236_boards)) | |
294 | continue; | |
295 | } else { | |
296 | /* Match specific model name. */ | |
297 | if (pci_dev->device != thisboard->devid) | |
298 | continue; | |
299 | } | |
300 | ||
301 | /* Found a match. */ | |
302 | *pci_dev_p = pci_dev; | |
303 | return 0; | |
304 | } | |
305 | /* No match found. */ | |
306 | if (bus || slot) { | |
307 | printk(KERN_ERR | |
0a85b6f0 MT |
308 | "comedi%d: error! no %s found at pci %02x:%02x!\n", |
309 | dev->minor, thisboard->name, bus, slot); | |
6a5c8664 IA |
310 | } else { |
311 | printk(KERN_ERR "comedi%d: error! no %s found!\n", | |
0a85b6f0 | 312 | dev->minor, thisboard->name); |
6a5c8664 IA |
313 | } |
314 | return -EIO; | |
315 | } | |
316 | #endif | |
317 | ||
318 | /* | |
319 | * Attach is called by the Comedi core to configure the driver | |
320 | * for a particular board. If you specified a board_name array | |
321 | * in the driver structure, dev->board_ptr contains that | |
322 | * address. | |
323 | */ | |
da91b269 | 324 | static int pc236_attach(struct comedi_device *dev, struct comedi_devconfig *it) |
6a5c8664 | 325 | { |
34c43922 | 326 | struct comedi_subdevice *s; |
6a5c8664 IA |
327 | unsigned long iobase = 0; |
328 | unsigned int irq = 0; | |
329 | #ifdef CONFIG_COMEDI_PCI | |
330 | struct pci_dev *pci_dev = NULL; | |
331 | int bus = 0, slot = 0; | |
332 | #endif | |
333 | int share_irq = 0; | |
334 | int ret; | |
335 | ||
336 | printk(KERN_DEBUG "comedi%d: %s: attach\n", dev->minor, | |
0a85b6f0 | 337 | PC236_DRIVER_NAME); |
6a5c8664 IA |
338 | /* |
339 | * Allocate the private structure area. alloc_private() is a | |
340 | * convenient macro defined in comedidev.h. | |
341 | */ | |
c3744138 BP |
342 | ret = alloc_private(dev, sizeof(struct pc236_private)); |
343 | if (ret < 0) { | |
6a5c8664 | 344 | printk(KERN_ERR "comedi%d: error! out of memory!\n", |
0a85b6f0 | 345 | dev->minor); |
6a5c8664 IA |
346 | return ret; |
347 | } | |
348 | /* Process options. */ | |
349 | switch (thisboard->bustype) { | |
350 | case isa_bustype: | |
351 | iobase = it->options[0]; | |
352 | irq = it->options[1]; | |
353 | share_irq = 0; | |
354 | break; | |
355 | #ifdef CONFIG_COMEDI_PCI | |
356 | case pci_bustype: | |
357 | bus = it->options[0]; | |
358 | slot = it->options[1]; | |
359 | share_irq = 1; | |
360 | ||
c3744138 BP |
361 | ret = pc236_find_pci(dev, bus, slot, &pci_dev); |
362 | if (ret < 0) | |
6a5c8664 IA |
363 | return ret; |
364 | devpriv->pci_dev = pci_dev; | |
365 | break; | |
366 | #endif /* CONFIG_COMEDI_PCI */ | |
367 | default: | |
368 | printk(KERN_ERR | |
0a85b6f0 MT |
369 | "comedi%d: %s: BUG! cannot determine board type!\n", |
370 | dev->minor, PC236_DRIVER_NAME); | |
6a5c8664 IA |
371 | return -EINVAL; |
372 | break; | |
373 | } | |
374 | ||
375 | /* | |
376 | * Initialize dev->board_name. | |
377 | */ | |
378 | dev->board_name = thisboard->name; | |
379 | ||
380 | /* Enable device and reserve I/O spaces. */ | |
381 | #ifdef CONFIG_COMEDI_PCI | |
382 | if (pci_dev) { | |
c3744138 BP |
383 | |
384 | ret = comedi_pci_enable(pci_dev, PC236_DRIVER_NAME); | |
385 | if (ret < 0) { | |
6a5c8664 | 386 | printk(KERN_ERR |
0a85b6f0 MT |
387 | "comedi%d: error! cannot enable PCI device and request regions!\n", |
388 | dev->minor); | |
6a5c8664 IA |
389 | return ret; |
390 | } | |
391 | devpriv->lcr_iobase = pci_resource_start(pci_dev, 1); | |
392 | iobase = pci_resource_start(pci_dev, 2); | |
393 | irq = pci_dev->irq; | |
394 | } else | |
395 | #endif | |
396 | { | |
397 | ret = pc236_request_region(dev->minor, iobase, PC236_IO_SIZE); | |
9f7a344b | 398 | if (ret < 0) |
6a5c8664 | 399 | return ret; |
6a5c8664 IA |
400 | } |
401 | dev->iobase = iobase; | |
402 | ||
403 | /* | |
404 | * Allocate the subdevice structures. alloc_subdevice() is a | |
405 | * convenient macro defined in comedidev.h. | |
406 | */ | |
c3744138 BP |
407 | ret = alloc_subdevices(dev, 2); |
408 | if (ret < 0) { | |
6a5c8664 | 409 | printk(KERN_ERR "comedi%d: error! out of memory!\n", |
0a85b6f0 | 410 | dev->minor); |
6a5c8664 IA |
411 | return ret; |
412 | } | |
413 | ||
414 | s = dev->subdevices + 0; | |
415 | /* digital i/o subdevice (8255) */ | |
c3744138 BP |
416 | ret = subdev_8255_init(dev, s, NULL, iobase); |
417 | if (ret < 0) { | |
6a5c8664 | 418 | printk(KERN_ERR "comedi%d: error! out of memory!\n", |
0a85b6f0 | 419 | dev->minor); |
6a5c8664 IA |
420 | return ret; |
421 | } | |
422 | s = dev->subdevices + 1; | |
423 | dev->read_subdev = s; | |
424 | s->type = COMEDI_SUBD_UNUSED; | |
425 | pc236_intr_disable(dev); | |
426 | if (irq) { | |
427 | unsigned long flags = share_irq ? IRQF_SHARED : 0; | |
428 | ||
5f74ea14 | 429 | if (request_irq(irq, pc236_interrupt, flags, |
6a5c8664 IA |
430 | PC236_DRIVER_NAME, dev) >= 0) { |
431 | dev->irq = irq; | |
432 | s->type = COMEDI_SUBD_DI; | |
433 | s->subdev_flags = SDF_READABLE | SDF_CMD_READ; | |
434 | s->n_chan = 1; | |
435 | s->maxdata = 1; | |
436 | s->range_table = &range_digital; | |
437 | s->insn_bits = pc236_intr_insn; | |
438 | s->do_cmdtest = pc236_intr_cmdtest; | |
439 | s->do_cmd = pc236_intr_cmd; | |
440 | s->cancel = pc236_intr_cancel; | |
441 | } | |
442 | } | |
443 | printk(KERN_INFO "comedi%d: %s ", dev->minor, dev->board_name); | |
444 | if (thisboard->bustype == isa_bustype) { | |
445 | printk("(base %#lx) ", iobase); | |
446 | } else { | |
447 | #ifdef CONFIG_COMEDI_PCI | |
448 | printk("(pci %s) ", pci_name(pci_dev)); | |
449 | #endif | |
450 | } | |
9f7a344b | 451 | if (irq) |
6a5c8664 | 452 | printk("(irq %u%s) ", irq, (dev->irq ? "" : " UNAVAILABLE")); |
9f7a344b | 453 | else |
6a5c8664 | 454 | printk("(no irq) "); |
6a5c8664 IA |
455 | |
456 | printk("attached\n"); | |
457 | ||
458 | return 1; | |
459 | } | |
460 | ||
461 | /* | |
462 | * _detach is called to deconfigure a device. It should deallocate | |
463 | * resources. | |
464 | * This function is also called when _attach() fails, so it should be | |
465 | * careful not to release resources that were not necessarily | |
466 | * allocated by _attach(). dev->private and dev->subdevices are | |
467 | * deallocated automatically by the core. | |
468 | */ | |
da91b269 | 469 | static int pc236_detach(struct comedi_device *dev) |
6a5c8664 IA |
470 | { |
471 | printk(KERN_DEBUG "comedi%d: %s: detach\n", dev->minor, | |
0a85b6f0 | 472 | PC236_DRIVER_NAME); |
9f7a344b | 473 | if (devpriv) |
6a5c8664 | 474 | pc236_intr_disable(dev); |
9f7a344b | 475 | |
6a5c8664 | 476 | if (dev->irq) |
5f74ea14 | 477 | free_irq(dev->irq, dev); |
9f7a344b | 478 | if (dev->subdevices) |
6a5c8664 | 479 | subdev_8255_cleanup(dev, dev->subdevices + 0); |
6a5c8664 IA |
480 | if (devpriv) { |
481 | #ifdef CONFIG_COMEDI_PCI | |
482 | if (devpriv->pci_dev) { | |
9f7a344b | 483 | if (dev->iobase) |
6a5c8664 | 484 | comedi_pci_disable(devpriv->pci_dev); |
6a5c8664 IA |
485 | pci_dev_put(devpriv->pci_dev); |
486 | } else | |
487 | #endif | |
488 | { | |
9f7a344b | 489 | if (dev->iobase) |
6a5c8664 | 490 | release_region(dev->iobase, PC236_IO_SIZE); |
6a5c8664 IA |
491 | } |
492 | } | |
493 | if (dev->board_name) { | |
494 | printk(KERN_INFO "comedi%d: %s removed\n", | |
0a85b6f0 | 495 | dev->minor, dev->board_name); |
6a5c8664 IA |
496 | } |
497 | return 0; | |
498 | } | |
499 | ||
500 | /* | |
501 | * This function checks and requests an I/O region, reporting an error | |
502 | * if there is a conflict. | |
503 | */ | |
504 | static int pc236_request_region(unsigned minor, unsigned long from, | |
0a85b6f0 | 505 | unsigned long extent) |
6a5c8664 IA |
506 | { |
507 | if (!from || !request_region(from, extent, PC236_DRIVER_NAME)) { | |
508 | printk(KERN_ERR "comedi%d: I/O port conflict (%#lx,%lu)!\n", | |
0a85b6f0 | 509 | minor, from, extent); |
6a5c8664 IA |
510 | return -EIO; |
511 | } | |
512 | return 0; | |
513 | } | |
514 | ||
515 | /* | |
516 | * This function is called to mark the interrupt as disabled (no command | |
517 | * configured on subdevice 1) and to physically disable the interrupt | |
518 | * (not possible on the PC36AT, except by removing the IRQ jumper!). | |
519 | */ | |
da91b269 | 520 | static void pc236_intr_disable(struct comedi_device *dev) |
6a5c8664 IA |
521 | { |
522 | unsigned long flags; | |
523 | ||
5f74ea14 | 524 | spin_lock_irqsave(&dev->spinlock, flags); |
6a5c8664 IA |
525 | devpriv->enable_irq = 0; |
526 | #ifdef CONFIG_COMEDI_PCI | |
527 | if (devpriv->lcr_iobase) | |
528 | outl(PCI236_INTR_DISABLE, devpriv->lcr_iobase + PLX9052_INTCSR); | |
529 | #endif | |
5f74ea14 | 530 | spin_unlock_irqrestore(&dev->spinlock, flags); |
6a5c8664 IA |
531 | } |
532 | ||
533 | /* | |
534 | * This function is called to mark the interrupt as enabled (a command | |
535 | * configured on subdevice 1) and to physically enable the interrupt | |
536 | * (not possible on the PC36AT, except by (re)connecting the IRQ jumper!). | |
537 | */ | |
da91b269 | 538 | static void pc236_intr_enable(struct comedi_device *dev) |
6a5c8664 IA |
539 | { |
540 | unsigned long flags; | |
541 | ||
5f74ea14 | 542 | spin_lock_irqsave(&dev->spinlock, flags); |
6a5c8664 IA |
543 | devpriv->enable_irq = 1; |
544 | #ifdef CONFIG_COMEDI_PCI | |
545 | if (devpriv->lcr_iobase) | |
546 | outl(PCI236_INTR_ENABLE, devpriv->lcr_iobase + PLX9052_INTCSR); | |
547 | #endif | |
5f74ea14 | 548 | spin_unlock_irqrestore(&dev->spinlock, flags); |
6a5c8664 IA |
549 | } |
550 | ||
551 | /* | |
552 | * This function is called when an interrupt occurs to check whether | |
553 | * the interrupt has been marked as enabled and was generated by the | |
554 | * board. If so, the function prepares the hardware for the next | |
555 | * interrupt. | |
556 | * Returns 0 if the interrupt should be ignored. | |
557 | */ | |
da91b269 | 558 | static int pc236_intr_check(struct comedi_device *dev) |
6a5c8664 IA |
559 | { |
560 | int retval = 0; | |
561 | unsigned long flags; | |
562 | ||
5f74ea14 | 563 | spin_lock_irqsave(&dev->spinlock, flags); |
6a5c8664 IA |
564 | if (devpriv->enable_irq) { |
565 | retval = 1; | |
566 | #ifdef CONFIG_COMEDI_PCI | |
567 | if (devpriv->lcr_iobase) { | |
568 | if ((inl(devpriv->lcr_iobase + PLX9052_INTCSR) | |
0a85b6f0 MT |
569 | & PLX9052_INTCSR_LI1STAT_MASK) |
570 | == PLX9052_INTCSR_LI1STAT_INACTIVE) { | |
6a5c8664 IA |
571 | retval = 0; |
572 | } else { | |
573 | /* Clear interrupt and keep it enabled. */ | |
574 | outl(PCI236_INTR_ENABLE, | |
0a85b6f0 | 575 | devpriv->lcr_iobase + PLX9052_INTCSR); |
6a5c8664 IA |
576 | } |
577 | } | |
578 | #endif | |
579 | } | |
5f74ea14 | 580 | spin_unlock_irqrestore(&dev->spinlock, flags); |
6a5c8664 IA |
581 | |
582 | return retval; | |
583 | } | |
584 | ||
585 | /* | |
586 | * Input from subdevice 1. | |
587 | * Copied from the comedi_parport driver. | |
588 | */ | |
0a85b6f0 MT |
589 | static int pc236_intr_insn(struct comedi_device *dev, |
590 | struct comedi_subdevice *s, struct comedi_insn *insn, | |
591 | unsigned int *data) | |
6a5c8664 IA |
592 | { |
593 | data[1] = 0; | |
594 | return 2; | |
595 | } | |
596 | ||
597 | /* | |
598 | * Subdevice 1 command test. | |
599 | * Copied from the comedi_parport driver. | |
600 | */ | |
0a85b6f0 MT |
601 | static int pc236_intr_cmdtest(struct comedi_device *dev, |
602 | struct comedi_subdevice *s, | |
603 | struct comedi_cmd *cmd) | |
6a5c8664 IA |
604 | { |
605 | int err = 0; | |
606 | int tmp; | |
607 | ||
608 | /* step 1 */ | |
609 | ||
610 | tmp = cmd->start_src; | |
611 | cmd->start_src &= TRIG_NOW; | |
612 | if (!cmd->start_src || tmp != cmd->start_src) | |
613 | err++; | |
614 | ||
615 | tmp = cmd->scan_begin_src; | |
616 | cmd->scan_begin_src &= TRIG_EXT; | |
617 | if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src) | |
618 | err++; | |
619 | ||
620 | tmp = cmd->convert_src; | |
621 | cmd->convert_src &= TRIG_FOLLOW; | |
622 | if (!cmd->convert_src || tmp != cmd->convert_src) | |
623 | err++; | |
624 | ||
625 | tmp = cmd->scan_end_src; | |
626 | cmd->scan_end_src &= TRIG_COUNT; | |
627 | if (!cmd->scan_end_src || tmp != cmd->scan_end_src) | |
628 | err++; | |
629 | ||
630 | tmp = cmd->stop_src; | |
631 | cmd->stop_src &= TRIG_NONE; | |
632 | if (!cmd->stop_src || tmp != cmd->stop_src) | |
633 | err++; | |
634 | ||
635 | if (err) | |
636 | return 1; | |
637 | ||
638 | /* step 2: ignored */ | |
639 | ||
640 | if (err) | |
641 | return 2; | |
642 | ||
643 | /* step 3: */ | |
644 | ||
645 | if (cmd->start_arg != 0) { | |
646 | cmd->start_arg = 0; | |
647 | err++; | |
648 | } | |
649 | if (cmd->scan_begin_arg != 0) { | |
650 | cmd->scan_begin_arg = 0; | |
651 | err++; | |
652 | } | |
653 | if (cmd->convert_arg != 0) { | |
654 | cmd->convert_arg = 0; | |
655 | err++; | |
656 | } | |
657 | if (cmd->scan_end_arg != 1) { | |
658 | cmd->scan_end_arg = 1; | |
659 | err++; | |
660 | } | |
661 | if (cmd->stop_arg != 0) { | |
662 | cmd->stop_arg = 0; | |
663 | err++; | |
664 | } | |
665 | ||
666 | if (err) | |
667 | return 3; | |
668 | ||
669 | /* step 4: ignored */ | |
670 | ||
671 | if (err) | |
672 | return 4; | |
673 | ||
674 | return 0; | |
675 | } | |
676 | ||
677 | /* | |
678 | * Subdevice 1 command. | |
679 | */ | |
da91b269 | 680 | static int pc236_intr_cmd(struct comedi_device *dev, struct comedi_subdevice *s) |
6a5c8664 IA |
681 | { |
682 | pc236_intr_enable(dev); | |
683 | ||
684 | return 0; | |
685 | } | |
686 | ||
687 | /* | |
688 | * Subdevice 1 cancel command. | |
689 | */ | |
0a85b6f0 MT |
690 | static int pc236_intr_cancel(struct comedi_device *dev, |
691 | struct comedi_subdevice *s) | |
6a5c8664 IA |
692 | { |
693 | pc236_intr_disable(dev); | |
694 | ||
695 | return 0; | |
696 | } | |
697 | ||
698 | /* | |
699 | * Interrupt service routine. | |
700 | * Based on the comedi_parport driver. | |
701 | */ | |
70265d24 | 702 | static irqreturn_t pc236_interrupt(int irq, void *d) |
6a5c8664 | 703 | { |
71b5f4f1 | 704 | struct comedi_device *dev = d; |
34c43922 | 705 | struct comedi_subdevice *s = dev->subdevices + 1; |
6a5c8664 IA |
706 | int handled; |
707 | ||
708 | handled = pc236_intr_check(dev); | |
709 | if (dev->attached && handled) { | |
710 | comedi_buf_put(s->async, 0); | |
711 | s->async->events |= COMEDI_CB_BLOCK | COMEDI_CB_EOS; | |
712 | comedi_event(dev, s); | |
713 | } | |
714 | return IRQ_RETVAL(handled); | |
715 | } | |
90f703d3 AT |
716 | |
717 | MODULE_AUTHOR("Comedi http://www.comedi.org"); | |
718 | MODULE_DESCRIPTION("Comedi low-level driver"); | |
719 | MODULE_LICENSE("GPL"); |