Commit | Line | Data |
---|---|---|
62ed6662 BB |
1 | /*====================================================================== |
2 | ||
3 | comedi/drivers/quatech_daqp_cs.c | |
4 | ||
5 | Quatech DAQP PCMCIA data capture cards COMEDI client driver | |
6 | Copyright (C) 2000, 2003 Brent Baccala <baccala@freesoft.org> | |
7 | The DAQP interface code in this file is released into the public domain. | |
8 | ||
9 | COMEDI - Linux Control and Measurement Device Interface | |
10 | Copyright (C) 1998 David A. Schleef <ds@schleef.org> | |
11 | http://www.comedi.org/ | |
12 | ||
13 | quatech_daqp_cs.c 1.10 | |
14 | ||
15 | Documentation for the DAQP PCMCIA cards can be found on Quatech's site: | |
16 | ||
17 | ftp://ftp.quatech.com/Manuals/daqp-208.pdf | |
18 | ||
19 | This manual is for both the DAQP-208 and the DAQP-308. | |
20 | ||
21 | What works: | |
22 | ||
23 | - A/D conversion | |
24 | - 8 channels | |
25 | - 4 gain ranges | |
26 | - ground ref or differential | |
27 | - single-shot and timed both supported | |
28 | - D/A conversion, single-shot | |
29 | - digital I/O | |
30 | ||
31 | What doesn't: | |
32 | ||
33 | - any kind of triggering - external or D/A channel 1 | |
34 | - the card's optional expansion board | |
35 | - the card's timer (for anything other than A/D conversion) | |
36 | - D/A update modes other than immediate (i.e, timed) | |
37 | - fancier timing modes | |
38 | - setting card's FIFO buffer thresholds to anything but default | |
39 | ||
40 | ======================================================================*/ | |
41 | ||
42 | /* | |
43 | Driver: quatech_daqp_cs | |
44 | Description: Quatech DAQP PCMCIA data capture cards | |
45 | Author: Brent Baccala <baccala@freesoft.org> | |
46 | Status: works | |
47 | Devices: [Quatech] DAQP-208 (daqp), DAQP-308 | |
48 | */ | |
49 | ||
50 | #include "../comedidev.h" | |
3142788b | 51 | #include <linux/semaphore.h> |
62ed6662 | 52 | |
62ed6662 BB |
53 | #include <pcmcia/cs_types.h> |
54 | #include <pcmcia/cs.h> | |
55 | #include <pcmcia/cistpl.h> | |
56 | #include <pcmcia/cisreg.h> | |
57 | #include <pcmcia/ds.h> | |
58 | ||
7ec52ed2 AIB |
59 | #include <linux/completion.h> |
60 | ||
62ed6662 BB |
61 | /* Maximum number of separate DAQP devices we'll allow */ |
62 | #define MAX_DEV 4 | |
63 | ||
ab64f663 | 64 | struct local_info_t { |
62ed6662 | 65 | struct pcmcia_device *link; |
62ed6662 BB |
66 | int stop; |
67 | int table_index; | |
68 | char board_name[32]; | |
69 | ||
70 | enum { semaphore, buffer } interrupt_mode; | |
71 | ||
7ec52ed2 | 72 | struct completion eos; |
62ed6662 | 73 | |
71b5f4f1 | 74 | struct comedi_device *dev; |
34c43922 | 75 | struct comedi_subdevice *s; |
62ed6662 | 76 | int count; |
ab64f663 | 77 | }; |
62ed6662 BB |
78 | |
79 | /* A list of "instances" of the device. */ | |
80 | ||
ab64f663 | 81 | static struct local_info_t *dev_table[MAX_DEV] = { NULL, /* ... */ }; |
62ed6662 BB |
82 | |
83 | /* The DAQP communicates with the system through a 16 byte I/O window. */ | |
84 | ||
85 | #define DAQP_FIFO_SIZE 4096 | |
86 | ||
87 | #define DAQP_FIFO 0 | |
88 | #define DAQP_SCANLIST 1 | |
89 | #define DAQP_CONTROL 2 | |
90 | #define DAQP_STATUS 2 | |
91 | #define DAQP_DIGITAL_IO 3 | |
92 | #define DAQP_PACER_LOW 4 | |
93 | #define DAQP_PACER_MID 5 | |
94 | #define DAQP_PACER_HIGH 6 | |
95 | #define DAQP_COMMAND 7 | |
96 | #define DAQP_DA 8 | |
97 | #define DAQP_TIMER 10 | |
98 | #define DAQP_AUX 15 | |
99 | ||
100 | #define DAQP_SCANLIST_DIFFERENTIAL 0x4000 | |
101 | #define DAQP_SCANLIST_GAIN(x) ((x)<<12) | |
102 | #define DAQP_SCANLIST_CHANNEL(x) ((x)<<8) | |
103 | #define DAQP_SCANLIST_START 0x0080 | |
104 | #define DAQP_SCANLIST_EXT_GAIN(x) ((x)<<4) | |
105 | #define DAQP_SCANLIST_EXT_CHANNEL(x) (x) | |
106 | ||
107 | #define DAQP_CONTROL_PACER_100kHz 0xc0 | |
108 | #define DAQP_CONTROL_PACER_1MHz 0x80 | |
109 | #define DAQP_CONTROL_PACER_5MHz 0x40 | |
110 | #define DAQP_CONTROL_PACER_EXTERNAL 0x00 | |
111 | #define DAQP_CONTORL_EXPANSION 0x20 | |
112 | #define DAQP_CONTROL_EOS_INT_ENABLE 0x10 | |
113 | #define DAQP_CONTROL_FIFO_INT_ENABLE 0x08 | |
114 | #define DAQP_CONTROL_TRIGGER_ONESHOT 0x00 | |
115 | #define DAQP_CONTROL_TRIGGER_CONTINUOUS 0x04 | |
116 | #define DAQP_CONTROL_TRIGGER_INTERNAL 0x00 | |
117 | #define DAQP_CONTROL_TRIGGER_EXTERNAL 0x02 | |
118 | #define DAQP_CONTROL_TRIGGER_RISING 0x00 | |
119 | #define DAQP_CONTROL_TRIGGER_FALLING 0x01 | |
120 | ||
121 | #define DAQP_STATUS_IDLE 0x80 | |
122 | #define DAQP_STATUS_RUNNING 0x40 | |
123 | #define DAQP_STATUS_EVENTS 0x38 | |
124 | #define DAQP_STATUS_DATA_LOST 0x20 | |
125 | #define DAQP_STATUS_END_OF_SCAN 0x10 | |
126 | #define DAQP_STATUS_FIFO_THRESHOLD 0x08 | |
127 | #define DAQP_STATUS_FIFO_FULL 0x04 | |
128 | #define DAQP_STATUS_FIFO_NEARFULL 0x02 | |
129 | #define DAQP_STATUS_FIFO_EMPTY 0x01 | |
130 | ||
131 | #define DAQP_COMMAND_ARM 0x80 | |
132 | #define DAQP_COMMAND_RSTF 0x40 | |
133 | #define DAQP_COMMAND_RSTQ 0x20 | |
134 | #define DAQP_COMMAND_STOP 0x10 | |
135 | #define DAQP_COMMAND_LATCH 0x08 | |
136 | #define DAQP_COMMAND_100kHz 0x00 | |
137 | #define DAQP_COMMAND_50kHz 0x02 | |
138 | #define DAQP_COMMAND_25kHz 0x04 | |
139 | #define DAQP_COMMAND_FIFO_DATA 0x01 | |
140 | #define DAQP_COMMAND_FIFO_PROGRAM 0x00 | |
141 | ||
142 | #define DAQP_AUX_TRIGGER_TTL 0x00 | |
143 | #define DAQP_AUX_TRIGGER_ANALOG 0x80 | |
144 | #define DAQP_AUX_TRIGGER_PRETRIGGER 0x40 | |
145 | #define DAQP_AUX_TIMER_INT_ENABLE 0x20 | |
146 | #define DAQP_AUX_TIMER_RELOAD 0x00 | |
147 | #define DAQP_AUX_TIMER_PAUSE 0x08 | |
148 | #define DAQP_AUX_TIMER_GO 0x10 | |
149 | #define DAQP_AUX_TIMER_GO_EXTERNAL 0x18 | |
150 | #define DAQP_AUX_TIMER_EXTERNAL_SRC 0x04 | |
151 | #define DAQP_AUX_TIMER_INTERNAL_SRC 0x00 | |
152 | #define DAQP_AUX_DA_DIRECT 0x00 | |
153 | #define DAQP_AUX_DA_OVERFLOW 0x01 | |
154 | #define DAQP_AUX_DA_EXTERNAL 0x02 | |
155 | #define DAQP_AUX_DA_PACER 0x03 | |
156 | ||
157 | #define DAQP_AUX_RUNNING 0x80 | |
158 | #define DAQP_AUX_TRIGGERED 0x40 | |
159 | #define DAQP_AUX_DA_BUFFER 0x20 | |
160 | #define DAQP_AUX_TIMER_OVERFLOW 0x10 | |
161 | #define DAQP_AUX_CONVERSION 0x08 | |
162 | #define DAQP_AUX_DATA_LOST 0x04 | |
163 | #define DAQP_AUX_FIFO_NEARFULL 0x02 | |
164 | #define DAQP_AUX_FIFO_EMPTY 0x01 | |
165 | ||
166 | /* These range structures tell COMEDI how the sample values map to | |
68c3dbff BP |
167 | * voltages. The A/D converter has four .ranges = +/- 10V through |
168 | * +/- 1.25V, and the D/A converter has only .one = +/- 5V. | |
62ed6662 BB |
169 | */ |
170 | ||
9ced1de6 | 171 | static const struct comedi_lrange range_daqp_ai = { 4, { |
0a85b6f0 MT |
172 | BIP_RANGE(10), |
173 | BIP_RANGE(5), | |
174 | BIP_RANGE(2.5), | |
175 | BIP_RANGE(1.25) | |
176 | } | |
62ed6662 BB |
177 | }; |
178 | ||
9ced1de6 | 179 | static const struct comedi_lrange range_daqp_ao = { 1, {BIP_RANGE(5)} }; |
62ed6662 BB |
180 | |
181 | /*====================================================================*/ | |
182 | ||
183 | /* comedi interface code */ | |
184 | ||
da91b269 BP |
185 | static int daqp_attach(struct comedi_device *dev, struct comedi_devconfig *it); |
186 | static int daqp_detach(struct comedi_device *dev); | |
139dfbdf | 187 | static struct comedi_driver driver_daqp = { |
68c3dbff BP |
188 | .driver_name = "quatech_daqp_cs", |
189 | .module = THIS_MODULE, | |
190 | .attach = daqp_attach, | |
191 | .detach = daqp_detach, | |
62ed6662 BB |
192 | }; |
193 | ||
194 | #ifdef DAQP_DEBUG | |
195 | ||
da91b269 | 196 | static void daqp_dump(struct comedi_device *dev) |
62ed6662 BB |
197 | { |
198 | printk("DAQP: status %02x; aux status %02x\n", | |
0a85b6f0 | 199 | inb(dev->iobase + DAQP_STATUS), inb(dev->iobase + DAQP_AUX)); |
62ed6662 BB |
200 | } |
201 | ||
202 | static void hex_dump(char *str, void *ptr, int len) | |
203 | { | |
204 | unsigned char *cptr = ptr; | |
205 | int i; | |
206 | ||
207 | printk(str); | |
208 | ||
209 | for (i = 0; i < len; i++) { | |
210 | if (i % 16 == 0) { | |
211 | printk("\n0x%08x:", (unsigned int)cptr); | |
212 | } | |
213 | printk(" %02x", *(cptr++)); | |
214 | } | |
215 | printk("\n"); | |
216 | } | |
217 | ||
218 | #endif | |
219 | ||
220 | /* Cancel a running acquisition */ | |
221 | ||
da91b269 | 222 | static int daqp_ai_cancel(struct comedi_device *dev, struct comedi_subdevice *s) |
62ed6662 | 223 | { |
0a85b6f0 | 224 | struct local_info_t *local = (struct local_info_t *)s->private; |
62ed6662 BB |
225 | |
226 | if (local->stop) { | |
227 | return -EIO; | |
228 | } | |
229 | ||
230 | outb(DAQP_COMMAND_STOP, dev->iobase + DAQP_COMMAND); | |
231 | ||
232 | /* flush any linguring data in FIFO - superfluous here */ | |
233 | /* outb(DAQP_COMMAND_RSTF, dev->iobase+DAQP_COMMAND); */ | |
234 | ||
235 | local->interrupt_mode = semaphore; | |
236 | ||
237 | return 0; | |
238 | } | |
239 | ||
240 | /* Interrupt handler | |
241 | * | |
242 | * Operates in one of two modes. If local->interrupt_mode is | |
7ec52ed2 | 243 | * 'semaphore', just signal the local->eos completion and return |
62ed6662 BB |
244 | * (one-shot mode). Otherwise (continuous mode), read data in from |
245 | * the card, transfer it to the buffer provided by the higher-level | |
246 | * comedi kernel module, and signal various comedi callback routines, | |
247 | * which run pretty quick. | |
248 | */ | |
e3752a1d | 249 | static enum irqreturn daqp_interrupt(int irq, void *dev_id) |
62ed6662 | 250 | { |
0a85b6f0 | 251 | struct local_info_t *local = (struct local_info_t *)dev_id; |
71b5f4f1 | 252 | struct comedi_device *dev; |
34c43922 | 253 | struct comedi_subdevice *s; |
62ed6662 BB |
254 | int loop_limit = 10000; |
255 | int status; | |
256 | ||
257 | if (local == NULL) { | |
258 | printk(KERN_WARNING | |
0a85b6f0 | 259 | "daqp_interrupt(): irq %d for unknown device.\n", irq); |
e3752a1d | 260 | return IRQ_NONE; |
62ed6662 BB |
261 | } |
262 | ||
263 | dev = local->dev; | |
264 | if (dev == NULL) { | |
265 | printk(KERN_WARNING "daqp_interrupt(): NULL comedi_device.\n"); | |
e3752a1d | 266 | return IRQ_NONE; |
62ed6662 BB |
267 | } |
268 | ||
269 | if (!dev->attached) { | |
270 | printk(KERN_WARNING | |
0a85b6f0 | 271 | "daqp_interrupt(): struct comedi_device not yet attached.\n"); |
e3752a1d | 272 | return IRQ_NONE; |
62ed6662 BB |
273 | } |
274 | ||
275 | s = local->s; | |
276 | if (s == NULL) { | |
277 | printk(KERN_WARNING | |
0a85b6f0 | 278 | "daqp_interrupt(): NULL comedi_subdevice.\n"); |
e3752a1d | 279 | return IRQ_NONE; |
62ed6662 BB |
280 | } |
281 | ||
0a85b6f0 | 282 | if ((struct local_info_t *)s->private != local) { |
62ed6662 | 283 | printk(KERN_WARNING |
0a85b6f0 | 284 | "daqp_interrupt(): invalid comedi_subdevice.\n"); |
e3752a1d | 285 | return IRQ_NONE; |
62ed6662 BB |
286 | } |
287 | ||
288 | switch (local->interrupt_mode) { | |
289 | ||
290 | case semaphore: | |
291 | ||
7ec52ed2 | 292 | complete(&local->eos); |
62ed6662 BB |
293 | break; |
294 | ||
295 | case buffer: | |
296 | ||
297 | while (!((status = inb(dev->iobase + DAQP_STATUS)) | |
0a85b6f0 | 298 | & DAQP_STATUS_FIFO_EMPTY)) { |
62ed6662 | 299 | |
790c5541 | 300 | short data; |
62ed6662 BB |
301 | |
302 | if (status & DAQP_STATUS_DATA_LOST) { | |
303 | s->async->events |= | |
0a85b6f0 | 304 | COMEDI_CB_EOA | COMEDI_CB_OVERFLOW; |
62ed6662 BB |
305 | printk("daqp: data lost\n"); |
306 | daqp_ai_cancel(dev, s); | |
307 | break; | |
308 | } | |
309 | ||
310 | data = inb(dev->iobase + DAQP_FIFO); | |
311 | data |= inb(dev->iobase + DAQP_FIFO) << 8; | |
312 | data ^= 0x8000; | |
313 | ||
314 | comedi_buf_put(s->async, data); | |
315 | ||
316 | /* If there's a limit, decrement it | |
317 | * and stop conversion if zero | |
318 | */ | |
319 | ||
320 | if (local->count > 0) { | |
321 | local->count--; | |
322 | if (local->count == 0) { | |
323 | daqp_ai_cancel(dev, s); | |
324 | s->async->events |= COMEDI_CB_EOA; | |
325 | break; | |
326 | } | |
327 | } | |
328 | ||
329 | if ((loop_limit--) <= 0) | |
330 | break; | |
331 | } | |
332 | ||
333 | if (loop_limit <= 0) { | |
334 | printk(KERN_WARNING | |
0a85b6f0 | 335 | "loop_limit reached in daqp_interrupt()\n"); |
62ed6662 BB |
336 | daqp_ai_cancel(dev, s); |
337 | s->async->events |= COMEDI_CB_EOA | COMEDI_CB_ERROR; | |
338 | } | |
339 | ||
340 | s->async->events |= COMEDI_CB_BLOCK; | |
341 | ||
342 | comedi_event(dev, s); | |
343 | } | |
e3752a1d | 344 | return IRQ_HANDLED; |
62ed6662 BB |
345 | } |
346 | ||
347 | /* One-shot analog data acquisition routine */ | |
348 | ||
0a85b6f0 MT |
349 | static int daqp_ai_insn_read(struct comedi_device *dev, |
350 | struct comedi_subdevice *s, | |
351 | struct comedi_insn *insn, unsigned int *data) | |
62ed6662 | 352 | { |
0a85b6f0 | 353 | struct local_info_t *local = (struct local_info_t *)s->private; |
62ed6662 BB |
354 | int i; |
355 | int v; | |
356 | int counter = 10000; | |
357 | ||
358 | if (local->stop) { | |
359 | return -EIO; | |
360 | } | |
361 | ||
362 | /* Stop any running conversion */ | |
363 | daqp_ai_cancel(dev, s); | |
364 | ||
365 | outb(0, dev->iobase + DAQP_AUX); | |
366 | ||
367 | /* Reset scan list queue */ | |
368 | outb(DAQP_COMMAND_RSTQ, dev->iobase + DAQP_COMMAND); | |
369 | ||
370 | /* Program one scan list entry */ | |
371 | ||
372 | v = DAQP_SCANLIST_CHANNEL(CR_CHAN(insn->chanspec)) | |
0a85b6f0 | 373 | | DAQP_SCANLIST_GAIN(CR_RANGE(insn->chanspec)); |
62ed6662 BB |
374 | |
375 | if (CR_AREF(insn->chanspec) == AREF_DIFF) { | |
376 | v |= DAQP_SCANLIST_DIFFERENTIAL; | |
377 | } | |
378 | ||
379 | v |= DAQP_SCANLIST_START; | |
380 | ||
381 | outb(v & 0xff, dev->iobase + DAQP_SCANLIST); | |
382 | outb(v >> 8, dev->iobase + DAQP_SCANLIST); | |
383 | ||
384 | /* Reset data FIFO (see page 28 of DAQP User's Manual) */ | |
385 | ||
386 | outb(DAQP_COMMAND_RSTF, dev->iobase + DAQP_COMMAND); | |
387 | ||
388 | /* Set trigger */ | |
389 | ||
390 | v = DAQP_CONTROL_TRIGGER_ONESHOT | DAQP_CONTROL_TRIGGER_INTERNAL | |
0a85b6f0 | 391 | | DAQP_CONTROL_PACER_100kHz | DAQP_CONTROL_EOS_INT_ENABLE; |
62ed6662 BB |
392 | |
393 | outb(v, dev->iobase + DAQP_CONTROL); | |
394 | ||
395 | /* Reset any pending interrupts (my card has a tendancy to require | |
396 | * require multiple reads on the status register to achieve this) | |
397 | */ | |
398 | ||
399 | while (--counter | |
0a85b6f0 | 400 | && (inb(dev->iobase + DAQP_STATUS) & DAQP_STATUS_EVENTS)) ; |
62ed6662 BB |
401 | if (!counter) { |
402 | printk("daqp: couldn't clear interrupts in status register\n"); | |
403 | return -1; | |
404 | } | |
405 | ||
7ec52ed2 | 406 | init_completion(&local->eos); |
62ed6662 BB |
407 | local->interrupt_mode = semaphore; |
408 | local->dev = dev; | |
409 | local->s = s; | |
410 | ||
411 | for (i = 0; i < insn->n; i++) { | |
412 | ||
413 | /* Start conversion */ | |
414 | outb(DAQP_COMMAND_ARM | DAQP_COMMAND_FIFO_DATA, | |
0a85b6f0 | 415 | dev->iobase + DAQP_COMMAND); |
62ed6662 | 416 | |
7ec52ed2 | 417 | /* Wait for interrupt service routine to unblock completion */ |
62ed6662 | 418 | /* Maybe could use a timeout here, but it's interruptible */ |
7ec52ed2 | 419 | if (wait_for_completion_interruptible(&local->eos)) |
62ed6662 BB |
420 | return -EINTR; |
421 | ||
422 | data[i] = inb(dev->iobase + DAQP_FIFO); | |
423 | data[i] |= inb(dev->iobase + DAQP_FIFO) << 8; | |
424 | data[i] ^= 0x8000; | |
425 | } | |
426 | ||
427 | return insn->n; | |
428 | } | |
429 | ||
430 | /* This function converts ns nanoseconds to a counter value suitable | |
431 | * for programming the device. We always use the DAQP's 5 MHz clock, | |
432 | * which with its 24-bit counter, allows values up to 84 seconds. | |
433 | * Also, the function adjusts ns so that it cooresponds to the actual | |
434 | * time that the device will use. | |
435 | */ | |
436 | ||
437 | static int daqp_ns_to_timer(unsigned int *ns, int round) | |
438 | { | |
439 | int timer; | |
440 | ||
441 | timer = *ns / 200; | |
442 | *ns = timer * 200; | |
443 | ||
444 | return timer; | |
445 | } | |
446 | ||
447 | /* cmdtest tests a particular command to see if it is valid. | |
448 | * Using the cmdtest ioctl, a user can create a valid cmd | |
449 | * and then have it executed by the cmd ioctl. | |
450 | * | |
451 | * cmdtest returns 1,2,3,4 or 0, depending on which tests | |
452 | * the command passes. | |
453 | */ | |
454 | ||
0a85b6f0 MT |
455 | static int daqp_ai_cmdtest(struct comedi_device *dev, |
456 | struct comedi_subdevice *s, struct comedi_cmd *cmd) | |
62ed6662 BB |
457 | { |
458 | int err = 0; | |
459 | int tmp; | |
460 | ||
461 | /* step 1: make sure trigger sources are trivially valid */ | |
462 | ||
463 | tmp = cmd->start_src; | |
464 | cmd->start_src &= TRIG_NOW; | |
465 | if (!cmd->start_src || tmp != cmd->start_src) | |
466 | err++; | |
467 | ||
468 | tmp = cmd->scan_begin_src; | |
469 | cmd->scan_begin_src &= TRIG_TIMER | TRIG_FOLLOW; | |
470 | if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src) | |
471 | err++; | |
472 | ||
473 | tmp = cmd->convert_src; | |
474 | cmd->convert_src &= TRIG_TIMER | TRIG_NOW; | |
475 | if (!cmd->convert_src || tmp != cmd->convert_src) | |
476 | err++; | |
477 | ||
478 | tmp = cmd->scan_end_src; | |
479 | cmd->scan_end_src &= TRIG_COUNT; | |
480 | if (!cmd->scan_end_src || tmp != cmd->scan_end_src) | |
481 | err++; | |
482 | ||
483 | tmp = cmd->stop_src; | |
484 | cmd->stop_src &= TRIG_COUNT | TRIG_NONE; | |
485 | if (!cmd->stop_src || tmp != cmd->stop_src) | |
486 | err++; | |
487 | ||
488 | if (err) | |
489 | return 1; | |
490 | ||
491 | /* step 2: make sure trigger sources are unique and mutually compatible */ | |
492 | ||
828684f9 | 493 | /* note that mutual compatibility is not an issue here */ |
62ed6662 | 494 | if (cmd->scan_begin_src != TRIG_TIMER && |
0a85b6f0 | 495 | cmd->scan_begin_src != TRIG_FOLLOW) |
62ed6662 BB |
496 | err++; |
497 | if (cmd->convert_src != TRIG_NOW && cmd->convert_src != TRIG_TIMER) | |
498 | err++; | |
499 | if (cmd->scan_begin_src == TRIG_FOLLOW && cmd->convert_src == TRIG_NOW) | |
500 | err++; | |
501 | if (cmd->stop_src != TRIG_COUNT && cmd->stop_src != TRIG_NONE) | |
502 | err++; | |
503 | ||
504 | if (err) | |
505 | return 2; | |
506 | ||
507 | /* step 3: make sure arguments are trivially compatible */ | |
508 | ||
509 | if (cmd->start_arg != 0) { | |
510 | cmd->start_arg = 0; | |
511 | err++; | |
512 | } | |
513 | #define MAX_SPEED 10000 /* 100 kHz - in nanoseconds */ | |
514 | ||
515 | if (cmd->scan_begin_src == TRIG_TIMER | |
0a85b6f0 | 516 | && cmd->scan_begin_arg < MAX_SPEED) { |
62ed6662 BB |
517 | cmd->scan_begin_arg = MAX_SPEED; |
518 | err++; | |
519 | } | |
520 | ||
521 | /* If both scan_begin and convert are both timer values, the only | |
522 | * way that can make sense is if the scan time is the number of | |
523 | * conversions times the convert time | |
524 | */ | |
525 | ||
526 | if (cmd->scan_begin_src == TRIG_TIMER && cmd->convert_src == TRIG_TIMER | |
0a85b6f0 | 527 | && cmd->scan_begin_arg != cmd->convert_arg * cmd->scan_end_arg) { |
62ed6662 BB |
528 | err++; |
529 | } | |
530 | ||
531 | if (cmd->convert_src == TRIG_TIMER && cmd->convert_arg < MAX_SPEED) { | |
532 | cmd->convert_arg = MAX_SPEED; | |
533 | err++; | |
534 | } | |
535 | ||
536 | if (cmd->scan_end_arg != cmd->chanlist_len) { | |
537 | cmd->scan_end_arg = cmd->chanlist_len; | |
538 | err++; | |
539 | } | |
540 | if (cmd->stop_src == TRIG_COUNT) { | |
541 | if (cmd->stop_arg > 0x00ffffff) { | |
542 | cmd->stop_arg = 0x00ffffff; | |
543 | err++; | |
544 | } | |
545 | } else { | |
546 | /* TRIG_NONE */ | |
547 | if (cmd->stop_arg != 0) { | |
548 | cmd->stop_arg = 0; | |
549 | err++; | |
550 | } | |
551 | } | |
552 | ||
553 | if (err) | |
554 | return 3; | |
555 | ||
556 | /* step 4: fix up any arguments */ | |
557 | ||
558 | if (cmd->scan_begin_src == TRIG_TIMER) { | |
559 | tmp = cmd->scan_begin_arg; | |
560 | daqp_ns_to_timer(&cmd->scan_begin_arg, | |
0a85b6f0 | 561 | cmd->flags & TRIG_ROUND_MASK); |
62ed6662 BB |
562 | if (tmp != cmd->scan_begin_arg) |
563 | err++; | |
564 | } | |
565 | ||
566 | if (cmd->convert_src == TRIG_TIMER) { | |
567 | tmp = cmd->convert_arg; | |
568 | daqp_ns_to_timer(&cmd->convert_arg, | |
0a85b6f0 | 569 | cmd->flags & TRIG_ROUND_MASK); |
62ed6662 BB |
570 | if (tmp != cmd->convert_arg) |
571 | err++; | |
572 | } | |
573 | ||
574 | if (err) | |
575 | return 4; | |
576 | ||
577 | return 0; | |
578 | } | |
579 | ||
da91b269 | 580 | static int daqp_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s) |
62ed6662 | 581 | { |
0a85b6f0 | 582 | struct local_info_t *local = (struct local_info_t *)s->private; |
ea6d0d4c | 583 | struct comedi_cmd *cmd = &s->async->cmd; |
e3752a1d | 584 | int counter; |
62ed6662 BB |
585 | int scanlist_start_on_every_entry; |
586 | int threshold; | |
587 | ||
588 | int i; | |
589 | int v; | |
590 | ||
591 | if (local->stop) { | |
592 | return -EIO; | |
593 | } | |
594 | ||
595 | /* Stop any running conversion */ | |
596 | daqp_ai_cancel(dev, s); | |
597 | ||
598 | outb(0, dev->iobase + DAQP_AUX); | |
599 | ||
600 | /* Reset scan list queue */ | |
601 | outb(DAQP_COMMAND_RSTQ, dev->iobase + DAQP_COMMAND); | |
602 | ||
603 | /* Program pacer clock | |
604 | * | |
605 | * There's two modes we can operate in. If convert_src is | |
606 | * TRIG_TIMER, then convert_arg specifies the time between | |
607 | * each conversion, so we program the pacer clock to that | |
608 | * frequency and set the SCANLIST_START bit on every scanlist | |
609 | * entry. Otherwise, convert_src is TRIG_NOW, which means | |
610 | * we want the fastest possible conversions, scan_begin_src | |
611 | * is TRIG_TIMER, and scan_begin_arg specifies the time between | |
612 | * each scan, so we program the pacer clock to this frequency | |
613 | * and only set the SCANLIST_START bit on the first entry. | |
614 | */ | |
615 | ||
616 | if (cmd->convert_src == TRIG_TIMER) { | |
e3752a1d | 617 | counter = daqp_ns_to_timer(&cmd->convert_arg, |
0a85b6f0 | 618 | cmd->flags & TRIG_ROUND_MASK); |
62ed6662 BB |
619 | outb(counter & 0xff, dev->iobase + DAQP_PACER_LOW); |
620 | outb((counter >> 8) & 0xff, dev->iobase + DAQP_PACER_MID); | |
621 | outb((counter >> 16) & 0xff, dev->iobase + DAQP_PACER_HIGH); | |
622 | scanlist_start_on_every_entry = 1; | |
623 | } else { | |
e3752a1d | 624 | counter = daqp_ns_to_timer(&cmd->scan_begin_arg, |
0a85b6f0 | 625 | cmd->flags & TRIG_ROUND_MASK); |
62ed6662 BB |
626 | outb(counter & 0xff, dev->iobase + DAQP_PACER_LOW); |
627 | outb((counter >> 8) & 0xff, dev->iobase + DAQP_PACER_MID); | |
628 | outb((counter >> 16) & 0xff, dev->iobase + DAQP_PACER_HIGH); | |
629 | scanlist_start_on_every_entry = 0; | |
630 | } | |
631 | ||
632 | /* Program scan list */ | |
633 | ||
634 | for (i = 0; i < cmd->chanlist_len; i++) { | |
635 | ||
636 | int chanspec = cmd->chanlist[i]; | |
637 | ||
638 | /* Program one scan list entry */ | |
639 | ||
640 | v = DAQP_SCANLIST_CHANNEL(CR_CHAN(chanspec)) | |
0a85b6f0 | 641 | | DAQP_SCANLIST_GAIN(CR_RANGE(chanspec)); |
62ed6662 BB |
642 | |
643 | if (CR_AREF(chanspec) == AREF_DIFF) { | |
644 | v |= DAQP_SCANLIST_DIFFERENTIAL; | |
645 | } | |
646 | ||
647 | if (i == 0 || scanlist_start_on_every_entry) { | |
648 | v |= DAQP_SCANLIST_START; | |
649 | } | |
650 | ||
651 | outb(v & 0xff, dev->iobase + DAQP_SCANLIST); | |
652 | outb(v >> 8, dev->iobase + DAQP_SCANLIST); | |
653 | } | |
654 | ||
655 | /* Now it's time to program the FIFO threshold, basically the | |
656 | * number of samples the card will buffer before it interrupts | |
657 | * the CPU. | |
658 | * | |
659 | * If we don't have a stop count, then use half the size of | |
660 | * the FIFO (the manufacturer's recommendation). Consider | |
661 | * that the FIFO can hold 2K samples (4K bytes). With the | |
662 | * threshold set at half the FIFO size, we have a margin of | |
663 | * error of 1024 samples. At the chip's maximum sample rate | |
664 | * of 100,000 Hz, the CPU would have to delay interrupt | |
665 | * service for a full 10 milliseconds in order to lose data | |
666 | * here (as opposed to higher up in the kernel). I've never | |
667 | * seen it happen. However, for slow sample rates it may | |
668 | * buffer too much data and introduce too much delay for the | |
669 | * user application. | |
670 | * | |
671 | * If we have a stop count, then things get more interesting. | |
672 | * If the stop count is less than the FIFO size (actually | |
673 | * three-quarters of the FIFO size - see below), we just use | |
674 | * the stop count itself as the threshold, the card interrupts | |
675 | * us when that many samples have been taken, and we kill the | |
676 | * acquisition at that point and are done. If the stop count | |
677 | * is larger than that, then we divide it by 2 until it's less | |
678 | * than three quarters of the FIFO size (we always leave the | |
679 | * top quarter of the FIFO as protection against sluggish CPU | |
680 | * interrupt response) and use that as the threshold. So, if | |
681 | * the stop count is 4000 samples, we divide by two twice to | |
682 | * get 1000 samples, use that as the threshold, take four | |
683 | * interrupts to get our 4000 samples and are done. | |
684 | * | |
685 | * The algorithm could be more clever. For example, if 81000 | |
686 | * samples are requested, we could set the threshold to 1500 | |
687 | * samples and take 54 interrupts to get 81000. But 54 isn't | |
688 | * a power of two, so this algorithm won't find that option. | |
689 | * Instead, it'll set the threshold at 1266 and take 64 | |
690 | * interrupts to get 81024 samples, of which the last 24 will | |
691 | * be discarded... but we won't get the last interrupt until | |
692 | * they've been collected. To find the first option, the | |
693 | * computer could look at the prime decomposition of the | |
694 | * sample count (81000 = 3^4 * 5^3 * 2^3) and factor it into a | |
695 | * threshold (1500 = 3 * 5^3 * 2^2) and an interrupt count (54 | |
696 | * = 3^3 * 2). Hmmm... a one-line while loop or prime | |
697 | * decomposition of integers... I'll leave it the way it is. | |
698 | * | |
699 | * I'll also note a mini-race condition before ignoring it in | |
700 | * the code. Let's say we're taking 4000 samples, as before. | |
701 | * After 1000 samples, we get an interrupt. But before that | |
702 | * interrupt is completely serviced, another sample is taken | |
703 | * and loaded into the FIFO. Since the interrupt handler | |
704 | * empties the FIFO before returning, it will read 1001 samples. | |
705 | * If that happens four times, we'll end up taking 4004 samples, | |
706 | * not 4000. The interrupt handler will discard the extra four | |
707 | * samples (by halting the acquisition with four samples still | |
708 | * in the FIFO), but we will have to wait for them. | |
709 | * | |
710 | * In short, this code works pretty well, but for either of | |
711 | * the two reasons noted, might end up waiting for a few more | |
712 | * samples than actually requested. Shouldn't make too much | |
713 | * of a difference. | |
714 | */ | |
715 | ||
716 | /* Save away the number of conversions we should perform, and | |
717 | * compute the FIFO threshold (in bytes, not samples - that's | |
718 | * why we multiple local->count by 2 = sizeof(sample)) | |
719 | */ | |
720 | ||
721 | if (cmd->stop_src == TRIG_COUNT) { | |
722 | local->count = cmd->stop_arg * cmd->scan_end_arg; | |
723 | threshold = 2 * local->count; | |
724 | while (threshold > DAQP_FIFO_SIZE * 3 / 4) | |
725 | threshold /= 2; | |
726 | } else { | |
727 | local->count = -1; | |
728 | threshold = DAQP_FIFO_SIZE / 2; | |
729 | } | |
730 | ||
731 | /* Reset data FIFO (see page 28 of DAQP User's Manual) */ | |
732 | ||
733 | outb(DAQP_COMMAND_RSTF, dev->iobase + DAQP_COMMAND); | |
734 | ||
735 | /* Set FIFO threshold. First two bytes are near-empty | |
736 | * threshold, which is unused; next two bytes are near-full | |
737 | * threshold. We computed the number of bytes we want in the | |
738 | * FIFO when the interrupt is generated, what the card wants | |
739 | * is actually the number of available bytes left in the FIFO | |
740 | * when the interrupt is to happen. | |
741 | */ | |
742 | ||
743 | outb(0x00, dev->iobase + DAQP_FIFO); | |
744 | outb(0x00, dev->iobase + DAQP_FIFO); | |
745 | ||
746 | outb((DAQP_FIFO_SIZE - threshold) & 0xff, dev->iobase + DAQP_FIFO); | |
747 | outb((DAQP_FIFO_SIZE - threshold) >> 8, dev->iobase + DAQP_FIFO); | |
748 | ||
749 | /* Set trigger */ | |
750 | ||
751 | v = DAQP_CONTROL_TRIGGER_CONTINUOUS | DAQP_CONTROL_TRIGGER_INTERNAL | |
0a85b6f0 | 752 | | DAQP_CONTROL_PACER_5MHz | DAQP_CONTROL_FIFO_INT_ENABLE; |
62ed6662 BB |
753 | |
754 | outb(v, dev->iobase + DAQP_CONTROL); | |
755 | ||
756 | /* Reset any pending interrupts (my card has a tendancy to require | |
757 | * require multiple reads on the status register to achieve this) | |
758 | */ | |
e3752a1d | 759 | counter = 100; |
62ed6662 | 760 | while (--counter |
0a85b6f0 | 761 | && (inb(dev->iobase + DAQP_STATUS) & DAQP_STATUS_EVENTS)) ; |
62ed6662 BB |
762 | if (!counter) { |
763 | printk("daqp: couldn't clear interrupts in status register\n"); | |
764 | return -1; | |
765 | } | |
766 | ||
767 | local->interrupt_mode = buffer; | |
768 | local->dev = dev; | |
769 | local->s = s; | |
770 | ||
771 | /* Start conversion */ | |
772 | outb(DAQP_COMMAND_ARM | DAQP_COMMAND_FIFO_DATA, | |
0a85b6f0 | 773 | dev->iobase + DAQP_COMMAND); |
62ed6662 BB |
774 | |
775 | return 0; | |
776 | } | |
777 | ||
778 | /* Single-shot analog output routine */ | |
779 | ||
0a85b6f0 MT |
780 | static int daqp_ao_insn_write(struct comedi_device *dev, |
781 | struct comedi_subdevice *s, | |
782 | struct comedi_insn *insn, unsigned int *data) | |
62ed6662 | 783 | { |
0a85b6f0 | 784 | struct local_info_t *local = (struct local_info_t *)s->private; |
62ed6662 BB |
785 | int d; |
786 | unsigned int chan; | |
787 | ||
788 | if (local->stop) { | |
789 | return -EIO; | |
790 | } | |
791 | ||
792 | chan = CR_CHAN(insn->chanspec); | |
793 | d = data[0]; | |
794 | d &= 0x0fff; | |
795 | d ^= 0x0800; /* Flip the sign */ | |
796 | d |= chan << 12; | |
797 | ||
798 | /* Make sure D/A update mode is direct update */ | |
799 | outb(0, dev->iobase + DAQP_AUX); | |
800 | ||
801 | outw(d, dev->iobase + DAQP_DA); | |
802 | ||
803 | return 1; | |
804 | } | |
805 | ||
806 | /* Digital input routine */ | |
807 | ||
0a85b6f0 MT |
808 | static int daqp_di_insn_read(struct comedi_device *dev, |
809 | struct comedi_subdevice *s, | |
810 | struct comedi_insn *insn, unsigned int *data) | |
62ed6662 | 811 | { |
0a85b6f0 | 812 | struct local_info_t *local = (struct local_info_t *)s->private; |
62ed6662 BB |
813 | |
814 | if (local->stop) { | |
815 | return -EIO; | |
816 | } | |
817 | ||
818 | data[0] = inb(dev->iobase + DAQP_DIGITAL_IO); | |
819 | ||
820 | return 1; | |
821 | } | |
822 | ||
823 | /* Digital output routine */ | |
824 | ||
0a85b6f0 MT |
825 | static int daqp_do_insn_write(struct comedi_device *dev, |
826 | struct comedi_subdevice *s, | |
827 | struct comedi_insn *insn, unsigned int *data) | |
62ed6662 | 828 | { |
0a85b6f0 | 829 | struct local_info_t *local = (struct local_info_t *)s->private; |
62ed6662 BB |
830 | |
831 | if (local->stop) { | |
832 | return -EIO; | |
833 | } | |
834 | ||
835 | outw(data[0] & 0xf, dev->iobase + DAQP_DIGITAL_IO); | |
836 | ||
837 | return 1; | |
838 | } | |
839 | ||
840 | /* daqp_attach is called via comedi_config to attach a comedi device | |
841 | * to a /dev/comedi*. Note that this is different from daqp_cs_attach() | |
842 | * which is called by the pcmcia subsystem to attach the PCMCIA card | |
843 | * when it is inserted. | |
844 | */ | |
845 | ||
da91b269 | 846 | static int daqp_attach(struct comedi_device *dev, struct comedi_devconfig *it) |
62ed6662 BB |
847 | { |
848 | int ret; | |
ab64f663 | 849 | struct local_info_t *local = dev_table[it->options[0]]; |
34c43922 | 850 | struct comedi_subdevice *s; |
62ed6662 BB |
851 | |
852 | if (it->options[0] < 0 || it->options[0] >= MAX_DEV || !local) { | |
853 | printk("comedi%d: No such daqp device %d\n", | |
0a85b6f0 | 854 | dev->minor, it->options[0]); |
62ed6662 BB |
855 | return -EIO; |
856 | } | |
857 | ||
858 | /* Typically brittle code that I don't completely understand, | |
859 | * but "it works on my card". The intent is to pull the model | |
860 | * number of the card out the PCMCIA CIS and stash it away as | |
861 | * the COMEDI board_name. Looks like the third field in | |
862 | * CISTPL_VERS_1 (offset 2) holds what we're looking for. If | |
863 | * it doesn't work, who cares, just leave it as "DAQP". | |
864 | */ | |
865 | ||
866 | strcpy(local->board_name, "DAQP"); | |
867 | dev->board_name = local->board_name; | |
55a19b39 DB |
868 | if (local->link->prod_id[2]) { |
869 | if (strncmp(local->link->prod_id[2], "DAQP", 4) == 0) { | |
870 | strncpy(local->board_name, local->link->prod_id[2], | |
871 | sizeof(local->board_name)); | |
62ed6662 BB |
872 | } |
873 | } | |
874 | ||
875 | dev->iobase = local->link->io.BasePort1; | |
876 | ||
c3744138 BP |
877 | ret = alloc_subdevices(dev, 4); |
878 | if (ret < 0) | |
62ed6662 BB |
879 | return ret; |
880 | ||
881 | printk("comedi%d: attaching daqp%d (io 0x%04lx)\n", | |
0a85b6f0 | 882 | dev->minor, it->options[0], dev->iobase); |
62ed6662 BB |
883 | |
884 | s = dev->subdevices + 0; | |
885 | dev->read_subdev = s; | |
886 | s->private = local; | |
887 | s->type = COMEDI_SUBD_AI; | |
888 | s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF | SDF_CMD_READ; | |
889 | s->n_chan = 8; | |
890 | s->len_chanlist = 2048; | |
891 | s->maxdata = 0xffff; | |
892 | s->range_table = &range_daqp_ai; | |
893 | s->insn_read = daqp_ai_insn_read; | |
894 | s->do_cmdtest = daqp_ai_cmdtest; | |
895 | s->do_cmd = daqp_ai_cmd; | |
896 | s->cancel = daqp_ai_cancel; | |
897 | ||
898 | s = dev->subdevices + 1; | |
899 | dev->write_subdev = s; | |
900 | s->private = local; | |
901 | s->type = COMEDI_SUBD_AO; | |
902 | s->subdev_flags = SDF_WRITEABLE; | |
903 | s->n_chan = 2; | |
904 | s->len_chanlist = 1; | |
905 | s->maxdata = 0x0fff; | |
906 | s->range_table = &range_daqp_ao; | |
907 | s->insn_write = daqp_ao_insn_write; | |
908 | ||
909 | s = dev->subdevices + 2; | |
910 | s->private = local; | |
911 | s->type = COMEDI_SUBD_DI; | |
912 | s->subdev_flags = SDF_READABLE; | |
913 | s->n_chan = 1; | |
914 | s->len_chanlist = 1; | |
915 | s->insn_read = daqp_di_insn_read; | |
916 | ||
917 | s = dev->subdevices + 3; | |
918 | s->private = local; | |
919 | s->type = COMEDI_SUBD_DO; | |
920 | s->subdev_flags = SDF_WRITEABLE; | |
921 | s->n_chan = 1; | |
922 | s->len_chanlist = 1; | |
923 | s->insn_write = daqp_do_insn_write; | |
924 | ||
925 | return 1; | |
926 | } | |
927 | ||
928 | /* daqp_detach (called from comedi_comdig) does nothing. If the PCMCIA | |
929 | * card is removed, daqp_cs_detach() is called by the pcmcia subsystem. | |
930 | */ | |
931 | ||
da91b269 | 932 | static int daqp_detach(struct comedi_device *dev) |
62ed6662 BB |
933 | { |
934 | printk("comedi%d: detaching daqp\n", dev->minor); | |
935 | ||
936 | return 0; | |
937 | } | |
938 | ||
939 | /*==================================================================== | |
940 | ||
941 | PCMCIA interface code | |
942 | ||
943 | The rest of the code in this file is based on dummy_cs.c v1.24 | |
944 | from the Linux pcmcia_cs distribution v3.1.8 and is subject | |
945 | to the following license agreement. | |
946 | ||
947 | The remaining contents of this file are subject to the Mozilla Public | |
948 | License Version 1.1 (the "License"); you may not use this file | |
949 | except in compliance with the License. You may obtain a copy of | |
950 | the License at http://www.mozilla.org/MPL/ | |
951 | ||
952 | Software distributed under the License is distributed on an "AS | |
953 | IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or | |
954 | implied. See the License for the specific language governing | |
955 | rights and limitations under the License. | |
956 | ||
957 | The initial developer of the original code is David A. Hinds | |
958 | <dhinds@pcmcia.sourceforge.org>. Portions created by David A. Hinds | |
959 | are Copyright (C) 1999 David A. Hinds. All Rights Reserved. | |
960 | ||
961 | Alternatively, the contents of this file may be used under the | |
962 | terms of the GNU Public License version 2 (the "GPL"), in which | |
963 | case the provisions of the GPL are applicable instead of the | |
964 | above. If you wish to allow the use of your version of this file | |
965 | only under the terms of the GPL and not to allow others to use | |
966 | your version of this file under the MPL, indicate your decision | |
967 | by deleting the provisions above and replace them with the notice | |
968 | and other provisions required by the GPL. If you do not delete | |
969 | the provisions above, a recipient may use your version of this | |
970 | file under either the MPL or the GPL. | |
971 | ||
972 | ======================================================================*/ | |
973 | ||
974 | /* | |
975 | The event() function is this driver's Card Services event handler. | |
976 | It will be called by Card Services when an appropriate card status | |
977 | event is received. The config() and release() entry points are | |
978 | used to configure or release a socket, in response to card | |
979 | insertion and ejection events. | |
980 | ||
981 | Kernel version 2.6.16 upwards uses suspend() and resume() functions | |
982 | instead of an event() function. | |
983 | */ | |
984 | ||
985 | static void daqp_cs_config(struct pcmcia_device *link); | |
986 | static void daqp_cs_release(struct pcmcia_device *link); | |
987 | static int daqp_cs_suspend(struct pcmcia_device *p_dev); | |
988 | static int daqp_cs_resume(struct pcmcia_device *p_dev); | |
989 | ||
990 | /* | |
991 | The attach() and detach() entry points are used to create and destroy | |
992 | "instances" of the driver, where each instance represents everything | |
993 | needed to manage one actual PCMCIA card. | |
994 | */ | |
995 | ||
996 | static int daqp_cs_attach(struct pcmcia_device *); | |
997 | static void daqp_cs_detach(struct pcmcia_device *); | |
998 | ||
999 | /* | |
1000 | The dev_info variable is the "key" that is used to match up this | |
1001 | device driver with appropriate cards, through the card configuration | |
1002 | database. | |
1003 | */ | |
1004 | ||
1005 | static const dev_info_t dev_info = "quatech_daqp_cs"; | |
1006 | ||
1007 | /*====================================================================== | |
1008 | ||
1009 | daqp_cs_attach() creates an "instance" of the driver, allocating | |
1010 | local data structures for one device. The device is registered | |
1011 | with Card Services. | |
1012 | ||
1013 | The dev_link structure is initialized, but we don't actually | |
1014 | configure the card at this point -- we wait until we receive a | |
1015 | card insertion event. | |
1016 | ||
1017 | ======================================================================*/ | |
1018 | ||
1019 | static int daqp_cs_attach(struct pcmcia_device *link) | |
1020 | { | |
ab64f663 | 1021 | struct local_info_t *local; |
62ed6662 BB |
1022 | int i; |
1023 | ||
55a19b39 | 1024 | dev_dbg(&link->dev, "daqp_cs_attach()\n"); |
62ed6662 BB |
1025 | |
1026 | for (i = 0; i < MAX_DEV; i++) | |
1027 | if (dev_table[i] == NULL) | |
1028 | break; | |
1029 | if (i == MAX_DEV) { | |
1030 | printk(KERN_NOTICE "daqp_cs: no devices available\n"); | |
1031 | return -ENODEV; | |
1032 | } | |
1033 | ||
1034 | /* Allocate space for private device-specific data */ | |
ab64f663 | 1035 | local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL); |
62ed6662 BB |
1036 | if (!local) |
1037 | return -ENOMEM; | |
1038 | ||
1039 | local->table_index = i; | |
1040 | dev_table[i] = local; | |
1041 | local->link = link; | |
1042 | link->priv = local; | |
1043 | ||
62ed6662 BB |
1044 | /* |
1045 | General socket configuration defaults can go here. In this | |
1046 | client, we assume very little, and rely on the CIS for almost | |
1047 | everything. In most clients, many details (i.e., number, sizes, | |
1048 | and attributes of IO windows) are fixed by the nature of the | |
1049 | device, and can be hard-wired here. | |
1050 | */ | |
1051 | link->conf.Attributes = 0; | |
1052 | link->conf.IntType = INT_MEMORY_AND_IO; | |
1053 | ||
1054 | daqp_cs_config(link); | |
1055 | ||
1056 | return 0; | |
1057 | } /* daqp_cs_attach */ | |
1058 | ||
1059 | /*====================================================================== | |
1060 | ||
1061 | This deletes a driver "instance". The device is de-registered | |
1062 | with Card Services. If it has been released, all local data | |
1063 | structures are freed. Otherwise, the structures will be freed | |
1064 | when the device is released. | |
1065 | ||
1066 | ======================================================================*/ | |
1067 | ||
1068 | static void daqp_cs_detach(struct pcmcia_device *link) | |
1069 | { | |
ab64f663 | 1070 | struct local_info_t *dev = link->priv; |
62ed6662 | 1071 | |
55a19b39 | 1072 | dev_dbg(&link->dev, "daqp_cs_detach\n"); |
62ed6662 | 1073 | |
7622802e JMC |
1074 | dev->stop = 1; |
1075 | daqp_cs_release(link); | |
62ed6662 BB |
1076 | |
1077 | /* Unlink device structure, and free it */ | |
1078 | dev_table[dev->table_index] = NULL; | |
1079 | if (dev) | |
1080 | kfree(dev); | |
1081 | ||
1082 | } /* daqp_cs_detach */ | |
1083 | ||
1084 | /*====================================================================== | |
1085 | ||
1086 | daqp_cs_config() is scheduled to run after a CARD_INSERTION event | |
1087 | is received, to configure the PCMCIA socket, and to make the | |
1088 | device available to the system. | |
1089 | ||
1090 | ======================================================================*/ | |
1091 | ||
c3744138 | 1092 | |
55a19b39 DB |
1093 | static int daqp_pcmcia_config_loop(struct pcmcia_device *p_dev, |
1094 | cistpl_cftable_entry_t *cfg, | |
1095 | cistpl_cftable_entry_t *dflt, | |
1096 | unsigned int vcc, | |
1097 | void *priv_data) | |
1098 | { | |
1099 | if (cfg->index == 0) | |
1100 | return -ENODEV; | |
62ed6662 | 1101 | |
55a19b39 | 1102 | /* Do we need to allocate an interrupt? */ |
eb14120f | 1103 | p_dev->conf.Attributes |= CONF_ENABLE_IRQ; |
55a19b39 DB |
1104 | |
1105 | /* IO window settings */ | |
1106 | p_dev->io.NumPorts1 = p_dev->io.NumPorts2 = 0; | |
1107 | if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) { | |
1108 | cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io; | |
1109 | p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO; | |
1110 | if (!(io->flags & CISTPL_IO_8BIT)) | |
1111 | p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_16; | |
1112 | if (!(io->flags & CISTPL_IO_16BIT)) | |
1113 | p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8; | |
1114 | p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK; | |
1115 | p_dev->io.BasePort1 = io->win[0].base; | |
1116 | p_dev->io.NumPorts1 = io->win[0].len; | |
1117 | if (io->nwin > 1) { | |
1118 | p_dev->io.Attributes2 = p_dev->io.Attributes1; | |
1119 | p_dev->io.BasePort2 = io->win[1].base; | |
1120 | p_dev->io.NumPorts2 = io->win[1].len; | |
1121 | } | |
62ed6662 | 1122 | } |
c3744138 | 1123 | |
55a19b39 DB |
1124 | /* This reserves IO space but doesn't actually enable it */ |
1125 | return pcmcia_request_io(p_dev, &p_dev->io); | |
1126 | } | |
62ed6662 | 1127 | |
55a19b39 DB |
1128 | static void daqp_cs_config(struct pcmcia_device *link) |
1129 | { | |
55a19b39 | 1130 | int ret; |
62ed6662 | 1131 | |
55a19b39 | 1132 | dev_dbg(&link->dev, "daqp_cs_config\n"); |
62ed6662 | 1133 | |
55a19b39 DB |
1134 | ret = pcmcia_loop_config(link, daqp_pcmcia_config_loop, NULL); |
1135 | if (ret) { | |
1136 | dev_warn(&link->dev, "no configuration found\n"); | |
1137 | goto failed; | |
62ed6662 BB |
1138 | } |
1139 | ||
eb14120f DB |
1140 | ret = pcmcia_request_irq(link, daqp_interrupt); |
1141 | if (ret) | |
1142 | goto failed; | |
62ed6662 BB |
1143 | |
1144 | /* | |
1145 | This actually configures the PCMCIA socket -- setting up | |
1146 | the I/O windows and the interrupt mapping, and putting the | |
1147 | card and host interface into "Memory and IO" mode. | |
1148 | */ | |
55a19b39 DB |
1149 | ret = pcmcia_request_configuration(link, &link->conf); |
1150 | if (ret) | |
1151 | goto failed; | |
62ed6662 | 1152 | |
62ed6662 | 1153 | /* Finally, report what we've done */ |
7622802e | 1154 | dev_info(&link->dev, "index 0x%02x", link->conf.ConfigIndex); |
62ed6662 | 1155 | if (link->conf.Attributes & CONF_ENABLE_IRQ) |
eb14120f | 1156 | printk(", irq %u", link->irq); |
62ed6662 BB |
1157 | if (link->io.NumPorts1) |
1158 | printk(", io 0x%04x-0x%04x", link->io.BasePort1, | |
0a85b6f0 | 1159 | link->io.BasePort1 + link->io.NumPorts1 - 1); |
62ed6662 BB |
1160 | if (link->io.NumPorts2) |
1161 | printk(" & 0x%04x-0x%04x", link->io.BasePort2, | |
0a85b6f0 | 1162 | link->io.BasePort2 + link->io.NumPorts2 - 1); |
62ed6662 BB |
1163 | printk("\n"); |
1164 | ||
1165 | return; | |
1166 | ||
55a19b39 | 1167 | failed: |
62ed6662 BB |
1168 | daqp_cs_release(link); |
1169 | ||
1170 | } /* daqp_cs_config */ | |
1171 | ||
1172 | static void daqp_cs_release(struct pcmcia_device *link) | |
1173 | { | |
55a19b39 | 1174 | dev_dbg(&link->dev, "daqp_cs_release\n"); |
62ed6662 BB |
1175 | |
1176 | pcmcia_disable_device(link); | |
1177 | } /* daqp_cs_release */ | |
1178 | ||
1179 | /*====================================================================== | |
1180 | ||
1181 | The card status event handler. Mostly, this schedules other | |
1182 | stuff to run after an event is received. | |
1183 | ||
1184 | When a CARD_REMOVAL event is received, we immediately set a | |
1185 | private flag to block future accesses to this device. All the | |
1186 | functions that actually access the device should check this flag | |
1187 | to make sure the card is still present. | |
1188 | ||
1189 | ======================================================================*/ | |
1190 | ||
1191 | static int daqp_cs_suspend(struct pcmcia_device *link) | |
1192 | { | |
ab64f663 | 1193 | struct local_info_t *local = link->priv; |
62ed6662 BB |
1194 | |
1195 | /* Mark the device as stopped, to block IO until later */ | |
1196 | local->stop = 1; | |
1197 | return 0; | |
1198 | } | |
1199 | ||
1200 | static int daqp_cs_resume(struct pcmcia_device *link) | |
1201 | { | |
ab64f663 | 1202 | struct local_info_t *local = link->priv; |
62ed6662 BB |
1203 | |
1204 | local->stop = 0; | |
1205 | ||
1206 | return 0; | |
1207 | } | |
1208 | ||
1209 | /*====================================================================*/ | |
1210 | ||
1211 | #ifdef MODULE | |
1212 | ||
1213 | static struct pcmcia_device_id daqp_cs_id_table[] = { | |
1214 | PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0027), | |
1215 | PCMCIA_DEVICE_NULL | |
1216 | }; | |
1217 | ||
1218 | MODULE_DEVICE_TABLE(pcmcia, daqp_cs_id_table); | |
6c7f8196 AK |
1219 | MODULE_AUTHOR("Brent Baccala <baccala@freesoft.org>"); |
1220 | MODULE_DESCRIPTION("Comedi driver for Quatech DAQP PCMCIA data capture cards"); | |
1221 | MODULE_LICENSE("GPL"); | |
62ed6662 | 1222 | |
e3752a1d | 1223 | static struct pcmcia_driver daqp_cs_driver = { |
62ed6662 BB |
1224 | .probe = daqp_cs_attach, |
1225 | .remove = daqp_cs_detach, | |
1226 | .suspend = daqp_cs_suspend, | |
1227 | .resume = daqp_cs_resume, | |
1228 | .id_table = daqp_cs_id_table, | |
1229 | .owner = THIS_MODULE, | |
1230 | .drv = { | |
0a85b6f0 | 1231 | .name = dev_info, |
62ed6662 BB |
1232 | }, |
1233 | }; | |
1234 | ||
1235 | int __init init_module(void) | |
1236 | { | |
62ed6662 BB |
1237 | pcmcia_register_driver(&daqp_cs_driver); |
1238 | comedi_driver_register(&driver_daqp); | |
1239 | return 0; | |
1240 | } | |
1241 | ||
1242 | void __exit cleanup_module(void) | |
1243 | { | |
62ed6662 BB |
1244 | comedi_driver_unregister(&driver_daqp); |
1245 | pcmcia_unregister_driver(&daqp_cs_driver); | |
1246 | } | |
1247 | ||
1248 | #endif |