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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 | ||
3420f6b4 | 17 | ftp://ftp.quatech.com/Manuals/daqp-208.pdf |
62ed6662 BB |
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.h> |
54 | #include <pcmcia/cistpl.h> | |
55 | #include <pcmcia/cisreg.h> | |
56 | #include <pcmcia/ds.h> | |
57 | ||
7ec52ed2 AIB |
58 | #include <linux/completion.h> |
59 | ||
62ed6662 BB |
60 | /* Maximum number of separate DAQP devices we'll allow */ |
61 | #define MAX_DEV 4 | |
62 | ||
ab64f663 | 63 | struct local_info_t { |
62ed6662 | 64 | struct pcmcia_device *link; |
62ed6662 BB |
65 | int stop; |
66 | int table_index; | |
67 | char board_name[32]; | |
68 | ||
69 | enum { semaphore, buffer } interrupt_mode; | |
70 | ||
7ec52ed2 | 71 | struct completion eos; |
62ed6662 | 72 | |
71b5f4f1 | 73 | struct comedi_device *dev; |
34c43922 | 74 | struct comedi_subdevice *s; |
62ed6662 | 75 | int count; |
ab64f663 | 76 | }; |
62ed6662 BB |
77 | |
78 | /* A list of "instances" of the device. */ | |
79 | ||
ab64f663 | 80 | static struct local_info_t *dev_table[MAX_DEV] = { NULL, /* ... */ }; |
62ed6662 BB |
81 | |
82 | /* The DAQP communicates with the system through a 16 byte I/O window. */ | |
83 | ||
84 | #define DAQP_FIFO_SIZE 4096 | |
85 | ||
86 | #define DAQP_FIFO 0 | |
87 | #define DAQP_SCANLIST 1 | |
88 | #define DAQP_CONTROL 2 | |
89 | #define DAQP_STATUS 2 | |
90 | #define DAQP_DIGITAL_IO 3 | |
91 | #define DAQP_PACER_LOW 4 | |
92 | #define DAQP_PACER_MID 5 | |
93 | #define DAQP_PACER_HIGH 6 | |
94 | #define DAQP_COMMAND 7 | |
95 | #define DAQP_DA 8 | |
96 | #define DAQP_TIMER 10 | |
97 | #define DAQP_AUX 15 | |
98 | ||
99 | #define DAQP_SCANLIST_DIFFERENTIAL 0x4000 | |
100 | #define DAQP_SCANLIST_GAIN(x) ((x)<<12) | |
101 | #define DAQP_SCANLIST_CHANNEL(x) ((x)<<8) | |
102 | #define DAQP_SCANLIST_START 0x0080 | |
103 | #define DAQP_SCANLIST_EXT_GAIN(x) ((x)<<4) | |
104 | #define DAQP_SCANLIST_EXT_CHANNEL(x) (x) | |
105 | ||
106 | #define DAQP_CONTROL_PACER_100kHz 0xc0 | |
107 | #define DAQP_CONTROL_PACER_1MHz 0x80 | |
108 | #define DAQP_CONTROL_PACER_5MHz 0x40 | |
109 | #define DAQP_CONTROL_PACER_EXTERNAL 0x00 | |
110 | #define DAQP_CONTORL_EXPANSION 0x20 | |
111 | #define DAQP_CONTROL_EOS_INT_ENABLE 0x10 | |
112 | #define DAQP_CONTROL_FIFO_INT_ENABLE 0x08 | |
113 | #define DAQP_CONTROL_TRIGGER_ONESHOT 0x00 | |
114 | #define DAQP_CONTROL_TRIGGER_CONTINUOUS 0x04 | |
115 | #define DAQP_CONTROL_TRIGGER_INTERNAL 0x00 | |
116 | #define DAQP_CONTROL_TRIGGER_EXTERNAL 0x02 | |
117 | #define DAQP_CONTROL_TRIGGER_RISING 0x00 | |
118 | #define DAQP_CONTROL_TRIGGER_FALLING 0x01 | |
119 | ||
120 | #define DAQP_STATUS_IDLE 0x80 | |
121 | #define DAQP_STATUS_RUNNING 0x40 | |
122 | #define DAQP_STATUS_EVENTS 0x38 | |
123 | #define DAQP_STATUS_DATA_LOST 0x20 | |
124 | #define DAQP_STATUS_END_OF_SCAN 0x10 | |
125 | #define DAQP_STATUS_FIFO_THRESHOLD 0x08 | |
126 | #define DAQP_STATUS_FIFO_FULL 0x04 | |
127 | #define DAQP_STATUS_FIFO_NEARFULL 0x02 | |
128 | #define DAQP_STATUS_FIFO_EMPTY 0x01 | |
129 | ||
130 | #define DAQP_COMMAND_ARM 0x80 | |
131 | #define DAQP_COMMAND_RSTF 0x40 | |
132 | #define DAQP_COMMAND_RSTQ 0x20 | |
133 | #define DAQP_COMMAND_STOP 0x10 | |
134 | #define DAQP_COMMAND_LATCH 0x08 | |
135 | #define DAQP_COMMAND_100kHz 0x00 | |
136 | #define DAQP_COMMAND_50kHz 0x02 | |
137 | #define DAQP_COMMAND_25kHz 0x04 | |
138 | #define DAQP_COMMAND_FIFO_DATA 0x01 | |
139 | #define DAQP_COMMAND_FIFO_PROGRAM 0x00 | |
140 | ||
141 | #define DAQP_AUX_TRIGGER_TTL 0x00 | |
142 | #define DAQP_AUX_TRIGGER_ANALOG 0x80 | |
143 | #define DAQP_AUX_TRIGGER_PRETRIGGER 0x40 | |
144 | #define DAQP_AUX_TIMER_INT_ENABLE 0x20 | |
145 | #define DAQP_AUX_TIMER_RELOAD 0x00 | |
146 | #define DAQP_AUX_TIMER_PAUSE 0x08 | |
147 | #define DAQP_AUX_TIMER_GO 0x10 | |
148 | #define DAQP_AUX_TIMER_GO_EXTERNAL 0x18 | |
149 | #define DAQP_AUX_TIMER_EXTERNAL_SRC 0x04 | |
150 | #define DAQP_AUX_TIMER_INTERNAL_SRC 0x00 | |
151 | #define DAQP_AUX_DA_DIRECT 0x00 | |
152 | #define DAQP_AUX_DA_OVERFLOW 0x01 | |
153 | #define DAQP_AUX_DA_EXTERNAL 0x02 | |
154 | #define DAQP_AUX_DA_PACER 0x03 | |
155 | ||
156 | #define DAQP_AUX_RUNNING 0x80 | |
157 | #define DAQP_AUX_TRIGGERED 0x40 | |
158 | #define DAQP_AUX_DA_BUFFER 0x20 | |
159 | #define DAQP_AUX_TIMER_OVERFLOW 0x10 | |
160 | #define DAQP_AUX_CONVERSION 0x08 | |
161 | #define DAQP_AUX_DATA_LOST 0x04 | |
162 | #define DAQP_AUX_FIFO_NEARFULL 0x02 | |
163 | #define DAQP_AUX_FIFO_EMPTY 0x01 | |
164 | ||
165 | /* These range structures tell COMEDI how the sample values map to | |
68c3dbff BP |
166 | * voltages. The A/D converter has four .ranges = +/- 10V through |
167 | * +/- 1.25V, and the D/A converter has only .one = +/- 5V. | |
62ed6662 BB |
168 | */ |
169 | ||
9ced1de6 | 170 | static const struct comedi_lrange range_daqp_ai = { 4, { |
0a85b6f0 MT |
171 | BIP_RANGE(10), |
172 | BIP_RANGE(5), | |
173 | BIP_RANGE(2.5), | |
174 | BIP_RANGE(1.25) | |
175 | } | |
62ed6662 BB |
176 | }; |
177 | ||
9ced1de6 | 178 | static const struct comedi_lrange range_daqp_ao = { 1, {BIP_RANGE(5)} }; |
62ed6662 BB |
179 | |
180 | /*====================================================================*/ | |
181 | ||
182 | /* comedi interface code */ | |
183 | ||
da91b269 BP |
184 | static int daqp_attach(struct comedi_device *dev, struct comedi_devconfig *it); |
185 | static int daqp_detach(struct comedi_device *dev); | |
139dfbdf | 186 | static struct comedi_driver driver_daqp = { |
68c3dbff BP |
187 | .driver_name = "quatech_daqp_cs", |
188 | .module = THIS_MODULE, | |
189 | .attach = daqp_attach, | |
190 | .detach = daqp_detach, | |
62ed6662 BB |
191 | }; |
192 | ||
193 | #ifdef DAQP_DEBUG | |
194 | ||
da91b269 | 195 | static void daqp_dump(struct comedi_device *dev) |
62ed6662 | 196 | { |
3420f6b4 | 197 | printk(KERN_INFO "DAQP: status %02x; aux status %02x\n", |
0a85b6f0 | 198 | inb(dev->iobase + DAQP_STATUS), inb(dev->iobase + DAQP_AUX)); |
62ed6662 BB |
199 | } |
200 | ||
201 | static void hex_dump(char *str, void *ptr, int len) | |
202 | { | |
203 | unsigned char *cptr = ptr; | |
204 | int i; | |
205 | ||
206 | printk(str); | |
207 | ||
208 | for (i = 0; i < len; i++) { | |
3420f6b4 | 209 | if (i % 16 == 0) |
5fc9e4d5 | 210 | printk("\n%p:", cptr); |
3420f6b4 | 211 | |
62ed6662 BB |
212 | printk(" %02x", *(cptr++)); |
213 | } | |
214 | printk("\n"); | |
215 | } | |
216 | ||
217 | #endif | |
218 | ||
219 | /* Cancel a running acquisition */ | |
220 | ||
da91b269 | 221 | static int daqp_ai_cancel(struct comedi_device *dev, struct comedi_subdevice *s) |
62ed6662 | 222 | { |
0a85b6f0 | 223 | struct local_info_t *local = (struct local_info_t *)s->private; |
62ed6662 | 224 | |
3420f6b4 | 225 | if (local->stop) |
62ed6662 | 226 | return -EIO; |
3420f6b4 | 227 | |
62ed6662 BB |
228 | |
229 | outb(DAQP_COMMAND_STOP, dev->iobase + DAQP_COMMAND); | |
230 | ||
231 | /* flush any linguring data in FIFO - superfluous here */ | |
232 | /* outb(DAQP_COMMAND_RSTF, dev->iobase+DAQP_COMMAND); */ | |
233 | ||
234 | local->interrupt_mode = semaphore; | |
235 | ||
236 | return 0; | |
237 | } | |
238 | ||
239 | /* Interrupt handler | |
240 | * | |
241 | * Operates in one of two modes. If local->interrupt_mode is | |
7ec52ed2 | 242 | * 'semaphore', just signal the local->eos completion and return |
62ed6662 BB |
243 | * (one-shot mode). Otherwise (continuous mode), read data in from |
244 | * the card, transfer it to the buffer provided by the higher-level | |
245 | * comedi kernel module, and signal various comedi callback routines, | |
246 | * which run pretty quick. | |
247 | */ | |
e3752a1d | 248 | static enum irqreturn daqp_interrupt(int irq, void *dev_id) |
62ed6662 | 249 | { |
0a85b6f0 | 250 | struct local_info_t *local = (struct local_info_t *)dev_id; |
71b5f4f1 | 251 | struct comedi_device *dev; |
34c43922 | 252 | struct comedi_subdevice *s; |
62ed6662 BB |
253 | int loop_limit = 10000; |
254 | int status; | |
255 | ||
256 | if (local == NULL) { | |
257 | printk(KERN_WARNING | |
0a85b6f0 | 258 | "daqp_interrupt(): irq %d for unknown device.\n", irq); |
e3752a1d | 259 | return IRQ_NONE; |
62ed6662 BB |
260 | } |
261 | ||
262 | dev = local->dev; | |
263 | if (dev == NULL) { | |
264 | printk(KERN_WARNING "daqp_interrupt(): NULL comedi_device.\n"); | |
e3752a1d | 265 | return IRQ_NONE; |
62ed6662 BB |
266 | } |
267 | ||
268 | if (!dev->attached) { | |
269 | printk(KERN_WARNING | |
0a85b6f0 | 270 | "daqp_interrupt(): struct comedi_device not yet attached.\n"); |
e3752a1d | 271 | return IRQ_NONE; |
62ed6662 BB |
272 | } |
273 | ||
274 | s = local->s; | |
275 | if (s == NULL) { | |
276 | printk(KERN_WARNING | |
0a85b6f0 | 277 | "daqp_interrupt(): NULL comedi_subdevice.\n"); |
e3752a1d | 278 | return IRQ_NONE; |
62ed6662 BB |
279 | } |
280 | ||
0a85b6f0 | 281 | if ((struct local_info_t *)s->private != local) { |
62ed6662 | 282 | printk(KERN_WARNING |
0a85b6f0 | 283 | "daqp_interrupt(): invalid comedi_subdevice.\n"); |
e3752a1d | 284 | return IRQ_NONE; |
62ed6662 BB |
285 | } |
286 | ||
287 | switch (local->interrupt_mode) { | |
288 | ||
289 | case semaphore: | |
290 | ||
7ec52ed2 | 291 | complete(&local->eos); |
62ed6662 BB |
292 | break; |
293 | ||
294 | case buffer: | |
295 | ||
296 | while (!((status = inb(dev->iobase + DAQP_STATUS)) | |
0a85b6f0 | 297 | & DAQP_STATUS_FIFO_EMPTY)) { |
62ed6662 | 298 | |
790c5541 | 299 | short data; |
62ed6662 BB |
300 | |
301 | if (status & DAQP_STATUS_DATA_LOST) { | |
302 | s->async->events |= | |
0a85b6f0 | 303 | COMEDI_CB_EOA | COMEDI_CB_OVERFLOW; |
62ed6662 BB |
304 | printk("daqp: data lost\n"); |
305 | daqp_ai_cancel(dev, s); | |
306 | break; | |
307 | } | |
308 | ||
309 | data = inb(dev->iobase + DAQP_FIFO); | |
310 | data |= inb(dev->iobase + DAQP_FIFO) << 8; | |
311 | data ^= 0x8000; | |
312 | ||
313 | comedi_buf_put(s->async, data); | |
314 | ||
315 | /* If there's a limit, decrement it | |
316 | * and stop conversion if zero | |
317 | */ | |
318 | ||
319 | if (local->count > 0) { | |
320 | local->count--; | |
321 | if (local->count == 0) { | |
322 | daqp_ai_cancel(dev, s); | |
323 | s->async->events |= COMEDI_CB_EOA; | |
324 | break; | |
325 | } | |
326 | } | |
327 | ||
328 | if ((loop_limit--) <= 0) | |
329 | break; | |
330 | } | |
331 | ||
332 | if (loop_limit <= 0) { | |
333 | printk(KERN_WARNING | |
0a85b6f0 | 334 | "loop_limit reached in daqp_interrupt()\n"); |
62ed6662 BB |
335 | daqp_ai_cancel(dev, s); |
336 | s->async->events |= COMEDI_CB_EOA | COMEDI_CB_ERROR; | |
337 | } | |
338 | ||
339 | s->async->events |= COMEDI_CB_BLOCK; | |
340 | ||
341 | comedi_event(dev, s); | |
342 | } | |
e3752a1d | 343 | return IRQ_HANDLED; |
62ed6662 BB |
344 | } |
345 | ||
346 | /* One-shot analog data acquisition routine */ | |
347 | ||
0a85b6f0 MT |
348 | static int daqp_ai_insn_read(struct comedi_device *dev, |
349 | struct comedi_subdevice *s, | |
350 | struct comedi_insn *insn, unsigned int *data) | |
62ed6662 | 351 | { |
0a85b6f0 | 352 | struct local_info_t *local = (struct local_info_t *)s->private; |
62ed6662 BB |
353 | int i; |
354 | int v; | |
355 | int counter = 10000; | |
356 | ||
3420f6b4 | 357 | if (local->stop) |
62ed6662 | 358 | return -EIO; |
3420f6b4 | 359 | |
62ed6662 BB |
360 | |
361 | /* Stop any running conversion */ | |
362 | daqp_ai_cancel(dev, s); | |
363 | ||
364 | outb(0, dev->iobase + DAQP_AUX); | |
365 | ||
366 | /* Reset scan list queue */ | |
367 | outb(DAQP_COMMAND_RSTQ, dev->iobase + DAQP_COMMAND); | |
368 | ||
369 | /* Program one scan list entry */ | |
370 | ||
371 | v = DAQP_SCANLIST_CHANNEL(CR_CHAN(insn->chanspec)) | |
0a85b6f0 | 372 | | DAQP_SCANLIST_GAIN(CR_RANGE(insn->chanspec)); |
62ed6662 | 373 | |
3420f6b4 | 374 | if (CR_AREF(insn->chanspec) == AREF_DIFF) |
62ed6662 | 375 | v |= DAQP_SCANLIST_DIFFERENTIAL; |
3420f6b4 | 376 | |
62ed6662 BB |
377 | |
378 | v |= DAQP_SCANLIST_START; | |
379 | ||
380 | outb(v & 0xff, dev->iobase + DAQP_SCANLIST); | |
381 | outb(v >> 8, dev->iobase + DAQP_SCANLIST); | |
382 | ||
383 | /* Reset data FIFO (see page 28 of DAQP User's Manual) */ | |
384 | ||
385 | outb(DAQP_COMMAND_RSTF, dev->iobase + DAQP_COMMAND); | |
386 | ||
387 | /* Set trigger */ | |
388 | ||
389 | v = DAQP_CONTROL_TRIGGER_ONESHOT | DAQP_CONTROL_TRIGGER_INTERNAL | |
0a85b6f0 | 390 | | DAQP_CONTROL_PACER_100kHz | DAQP_CONTROL_EOS_INT_ENABLE; |
62ed6662 BB |
391 | |
392 | outb(v, dev->iobase + DAQP_CONTROL); | |
393 | ||
394 | /* Reset any pending interrupts (my card has a tendancy to require | |
395 | * require multiple reads on the status register to achieve this) | |
396 | */ | |
397 | ||
398 | while (--counter | |
0a85b6f0 | 399 | && (inb(dev->iobase + DAQP_STATUS) & DAQP_STATUS_EVENTS)) ; |
62ed6662 BB |
400 | if (!counter) { |
401 | printk("daqp: couldn't clear interrupts in status register\n"); | |
402 | return -1; | |
403 | } | |
404 | ||
7ec52ed2 | 405 | init_completion(&local->eos); |
62ed6662 BB |
406 | local->interrupt_mode = semaphore; |
407 | local->dev = dev; | |
408 | local->s = s; | |
409 | ||
410 | for (i = 0; i < insn->n; i++) { | |
411 | ||
412 | /* Start conversion */ | |
413 | outb(DAQP_COMMAND_ARM | DAQP_COMMAND_FIFO_DATA, | |
0a85b6f0 | 414 | dev->iobase + DAQP_COMMAND); |
62ed6662 | 415 | |
7ec52ed2 | 416 | /* Wait for interrupt service routine to unblock completion */ |
62ed6662 | 417 | /* Maybe could use a timeout here, but it's interruptible */ |
7ec52ed2 | 418 | if (wait_for_completion_interruptible(&local->eos)) |
62ed6662 BB |
419 | return -EINTR; |
420 | ||
421 | data[i] = inb(dev->iobase + DAQP_FIFO); | |
422 | data[i] |= inb(dev->iobase + DAQP_FIFO) << 8; | |
423 | data[i] ^= 0x8000; | |
424 | } | |
425 | ||
426 | return insn->n; | |
427 | } | |
428 | ||
429 | /* This function converts ns nanoseconds to a counter value suitable | |
430 | * for programming the device. We always use the DAQP's 5 MHz clock, | |
431 | * which with its 24-bit counter, allows values up to 84 seconds. | |
432 | * Also, the function adjusts ns so that it cooresponds to the actual | |
433 | * time that the device will use. | |
434 | */ | |
435 | ||
436 | static int daqp_ns_to_timer(unsigned int *ns, int round) | |
437 | { | |
438 | int timer; | |
439 | ||
440 | timer = *ns / 200; | |
441 | *ns = timer * 200; | |
442 | ||
443 | return timer; | |
444 | } | |
445 | ||
446 | /* cmdtest tests a particular command to see if it is valid. | |
447 | * Using the cmdtest ioctl, a user can create a valid cmd | |
448 | * and then have it executed by the cmd ioctl. | |
449 | * | |
450 | * cmdtest returns 1,2,3,4 or 0, depending on which tests | |
451 | * the command passes. | |
452 | */ | |
453 | ||
0a85b6f0 MT |
454 | static int daqp_ai_cmdtest(struct comedi_device *dev, |
455 | struct comedi_subdevice *s, struct comedi_cmd *cmd) | |
62ed6662 BB |
456 | { |
457 | int err = 0; | |
458 | int tmp; | |
459 | ||
460 | /* step 1: make sure trigger sources are trivially valid */ | |
461 | ||
462 | tmp = cmd->start_src; | |
463 | cmd->start_src &= TRIG_NOW; | |
464 | if (!cmd->start_src || tmp != cmd->start_src) | |
465 | err++; | |
466 | ||
467 | tmp = cmd->scan_begin_src; | |
468 | cmd->scan_begin_src &= TRIG_TIMER | TRIG_FOLLOW; | |
469 | if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src) | |
470 | err++; | |
471 | ||
472 | tmp = cmd->convert_src; | |
473 | cmd->convert_src &= TRIG_TIMER | TRIG_NOW; | |
474 | if (!cmd->convert_src || tmp != cmd->convert_src) | |
475 | err++; | |
476 | ||
477 | tmp = cmd->scan_end_src; | |
478 | cmd->scan_end_src &= TRIG_COUNT; | |
479 | if (!cmd->scan_end_src || tmp != cmd->scan_end_src) | |
480 | err++; | |
481 | ||
482 | tmp = cmd->stop_src; | |
483 | cmd->stop_src &= TRIG_COUNT | TRIG_NONE; | |
484 | if (!cmd->stop_src || tmp != cmd->stop_src) | |
485 | err++; | |
486 | ||
487 | if (err) | |
488 | return 1; | |
489 | ||
3420f6b4 GS |
490 | /* |
491 | * step 2: make sure trigger sources | |
492 | * are unique and mutually compatible | |
493 | */ | |
62ed6662 | 494 | |
828684f9 | 495 | /* note that mutual compatibility is not an issue here */ |
62ed6662 | 496 | if (cmd->scan_begin_src != TRIG_TIMER && |
0a85b6f0 | 497 | cmd->scan_begin_src != TRIG_FOLLOW) |
62ed6662 BB |
498 | err++; |
499 | if (cmd->convert_src != TRIG_NOW && cmd->convert_src != TRIG_TIMER) | |
500 | err++; | |
501 | if (cmd->scan_begin_src == TRIG_FOLLOW && cmd->convert_src == TRIG_NOW) | |
502 | err++; | |
503 | if (cmd->stop_src != TRIG_COUNT && cmd->stop_src != TRIG_NONE) | |
504 | err++; | |
505 | ||
506 | if (err) | |
507 | return 2; | |
508 | ||
509 | /* step 3: make sure arguments are trivially compatible */ | |
510 | ||
511 | if (cmd->start_arg != 0) { | |
512 | cmd->start_arg = 0; | |
513 | err++; | |
514 | } | |
515 | #define MAX_SPEED 10000 /* 100 kHz - in nanoseconds */ | |
516 | ||
517 | if (cmd->scan_begin_src == TRIG_TIMER | |
0a85b6f0 | 518 | && cmd->scan_begin_arg < MAX_SPEED) { |
62ed6662 BB |
519 | cmd->scan_begin_arg = MAX_SPEED; |
520 | err++; | |
521 | } | |
522 | ||
523 | /* If both scan_begin and convert are both timer values, the only | |
524 | * way that can make sense is if the scan time is the number of | |
525 | * conversions times the convert time | |
526 | */ | |
527 | ||
528 | if (cmd->scan_begin_src == TRIG_TIMER && cmd->convert_src == TRIG_TIMER | |
0a85b6f0 | 529 | && cmd->scan_begin_arg != cmd->convert_arg * cmd->scan_end_arg) { |
62ed6662 BB |
530 | err++; |
531 | } | |
532 | ||
533 | if (cmd->convert_src == TRIG_TIMER && cmd->convert_arg < MAX_SPEED) { | |
534 | cmd->convert_arg = MAX_SPEED; | |
535 | err++; | |
536 | } | |
537 | ||
538 | if (cmd->scan_end_arg != cmd->chanlist_len) { | |
539 | cmd->scan_end_arg = cmd->chanlist_len; | |
540 | err++; | |
541 | } | |
542 | if (cmd->stop_src == TRIG_COUNT) { | |
543 | if (cmd->stop_arg > 0x00ffffff) { | |
544 | cmd->stop_arg = 0x00ffffff; | |
545 | err++; | |
546 | } | |
547 | } else { | |
548 | /* TRIG_NONE */ | |
549 | if (cmd->stop_arg != 0) { | |
550 | cmd->stop_arg = 0; | |
551 | err++; | |
552 | } | |
553 | } | |
554 | ||
555 | if (err) | |
556 | return 3; | |
557 | ||
558 | /* step 4: fix up any arguments */ | |
559 | ||
560 | if (cmd->scan_begin_src == TRIG_TIMER) { | |
561 | tmp = cmd->scan_begin_arg; | |
562 | daqp_ns_to_timer(&cmd->scan_begin_arg, | |
0a85b6f0 | 563 | cmd->flags & TRIG_ROUND_MASK); |
62ed6662 BB |
564 | if (tmp != cmd->scan_begin_arg) |
565 | err++; | |
566 | } | |
567 | ||
568 | if (cmd->convert_src == TRIG_TIMER) { | |
569 | tmp = cmd->convert_arg; | |
570 | daqp_ns_to_timer(&cmd->convert_arg, | |
0a85b6f0 | 571 | cmd->flags & TRIG_ROUND_MASK); |
62ed6662 BB |
572 | if (tmp != cmd->convert_arg) |
573 | err++; | |
574 | } | |
575 | ||
576 | if (err) | |
577 | return 4; | |
578 | ||
579 | return 0; | |
580 | } | |
581 | ||
da91b269 | 582 | static int daqp_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s) |
62ed6662 | 583 | { |
0a85b6f0 | 584 | struct local_info_t *local = (struct local_info_t *)s->private; |
ea6d0d4c | 585 | struct comedi_cmd *cmd = &s->async->cmd; |
e3752a1d | 586 | int counter; |
62ed6662 BB |
587 | int scanlist_start_on_every_entry; |
588 | int threshold; | |
589 | ||
590 | int i; | |
591 | int v; | |
592 | ||
3420f6b4 | 593 | if (local->stop) |
62ed6662 | 594 | return -EIO; |
3420f6b4 | 595 | |
62ed6662 BB |
596 | |
597 | /* Stop any running conversion */ | |
598 | daqp_ai_cancel(dev, s); | |
599 | ||
600 | outb(0, dev->iobase + DAQP_AUX); | |
601 | ||
602 | /* Reset scan list queue */ | |
603 | outb(DAQP_COMMAND_RSTQ, dev->iobase + DAQP_COMMAND); | |
604 | ||
605 | /* Program pacer clock | |
606 | * | |
607 | * There's two modes we can operate in. If convert_src is | |
608 | * TRIG_TIMER, then convert_arg specifies the time between | |
609 | * each conversion, so we program the pacer clock to that | |
610 | * frequency and set the SCANLIST_START bit on every scanlist | |
611 | * entry. Otherwise, convert_src is TRIG_NOW, which means | |
612 | * we want the fastest possible conversions, scan_begin_src | |
613 | * is TRIG_TIMER, and scan_begin_arg specifies the time between | |
614 | * each scan, so we program the pacer clock to this frequency | |
615 | * and only set the SCANLIST_START bit on the first entry. | |
616 | */ | |
617 | ||
618 | if (cmd->convert_src == TRIG_TIMER) { | |
e3752a1d | 619 | counter = daqp_ns_to_timer(&cmd->convert_arg, |
0a85b6f0 | 620 | cmd->flags & TRIG_ROUND_MASK); |
62ed6662 BB |
621 | outb(counter & 0xff, dev->iobase + DAQP_PACER_LOW); |
622 | outb((counter >> 8) & 0xff, dev->iobase + DAQP_PACER_MID); | |
623 | outb((counter >> 16) & 0xff, dev->iobase + DAQP_PACER_HIGH); | |
624 | scanlist_start_on_every_entry = 1; | |
625 | } else { | |
e3752a1d | 626 | counter = daqp_ns_to_timer(&cmd->scan_begin_arg, |
0a85b6f0 | 627 | cmd->flags & TRIG_ROUND_MASK); |
62ed6662 BB |
628 | outb(counter & 0xff, dev->iobase + DAQP_PACER_LOW); |
629 | outb((counter >> 8) & 0xff, dev->iobase + DAQP_PACER_MID); | |
630 | outb((counter >> 16) & 0xff, dev->iobase + DAQP_PACER_HIGH); | |
631 | scanlist_start_on_every_entry = 0; | |
632 | } | |
633 | ||
634 | /* Program scan list */ | |
635 | ||
636 | for (i = 0; i < cmd->chanlist_len; i++) { | |
637 | ||
638 | int chanspec = cmd->chanlist[i]; | |
639 | ||
640 | /* Program one scan list entry */ | |
641 | ||
642 | v = DAQP_SCANLIST_CHANNEL(CR_CHAN(chanspec)) | |
0a85b6f0 | 643 | | DAQP_SCANLIST_GAIN(CR_RANGE(chanspec)); |
62ed6662 | 644 | |
3420f6b4 | 645 | if (CR_AREF(chanspec) == AREF_DIFF) |
62ed6662 | 646 | v |= DAQP_SCANLIST_DIFFERENTIAL; |
62ed6662 | 647 | |
3420f6b4 | 648 | if (i == 0 || scanlist_start_on_every_entry) |
62ed6662 | 649 | v |= DAQP_SCANLIST_START; |
62ed6662 BB |
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 | 762 | if (!counter) { |
3420f6b4 GS |
763 | printk(KERN_ERR |
764 | "daqp: couldn't clear interrupts in status register\n"); | |
62ed6662 BB |
765 | return -1; |
766 | } | |
767 | ||
768 | local->interrupt_mode = buffer; | |
769 | local->dev = dev; | |
770 | local->s = s; | |
771 | ||
772 | /* Start conversion */ | |
773 | outb(DAQP_COMMAND_ARM | DAQP_COMMAND_FIFO_DATA, | |
0a85b6f0 | 774 | dev->iobase + DAQP_COMMAND); |
62ed6662 BB |
775 | |
776 | return 0; | |
777 | } | |
778 | ||
779 | /* Single-shot analog output routine */ | |
780 | ||
0a85b6f0 MT |
781 | static int daqp_ao_insn_write(struct comedi_device *dev, |
782 | struct comedi_subdevice *s, | |
783 | struct comedi_insn *insn, unsigned int *data) | |
62ed6662 | 784 | { |
0a85b6f0 | 785 | struct local_info_t *local = (struct local_info_t *)s->private; |
62ed6662 BB |
786 | int d; |
787 | unsigned int chan; | |
788 | ||
3420f6b4 | 789 | if (local->stop) |
62ed6662 | 790 | return -EIO; |
62ed6662 BB |
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 | 813 | |
3420f6b4 | 814 | if (local->stop) |
62ed6662 | 815 | return -EIO; |
62ed6662 BB |
816 | |
817 | data[0] = inb(dev->iobase + DAQP_DIGITAL_IO); | |
818 | ||
819 | return 1; | |
820 | } | |
821 | ||
822 | /* Digital output routine */ | |
823 | ||
0a85b6f0 MT |
824 | static int daqp_do_insn_write(struct comedi_device *dev, |
825 | struct comedi_subdevice *s, | |
826 | struct comedi_insn *insn, unsigned int *data) | |
62ed6662 | 827 | { |
0a85b6f0 | 828 | struct local_info_t *local = (struct local_info_t *)s->private; |
62ed6662 | 829 | |
3420f6b4 | 830 | if (local->stop) |
62ed6662 | 831 | return -EIO; |
62ed6662 BB |
832 | |
833 | outw(data[0] & 0xf, dev->iobase + DAQP_DIGITAL_IO); | |
834 | ||
835 | return 1; | |
836 | } | |
837 | ||
838 | /* daqp_attach is called via comedi_config to attach a comedi device | |
839 | * to a /dev/comedi*. Note that this is different from daqp_cs_attach() | |
840 | * which is called by the pcmcia subsystem to attach the PCMCIA card | |
841 | * when it is inserted. | |
842 | */ | |
843 | ||
da91b269 | 844 | static int daqp_attach(struct comedi_device *dev, struct comedi_devconfig *it) |
62ed6662 BB |
845 | { |
846 | int ret; | |
ab64f663 | 847 | struct local_info_t *local = dev_table[it->options[0]]; |
34c43922 | 848 | struct comedi_subdevice *s; |
62ed6662 BB |
849 | |
850 | if (it->options[0] < 0 || it->options[0] >= MAX_DEV || !local) { | |
851 | printk("comedi%d: No such daqp device %d\n", | |
0a85b6f0 | 852 | dev->minor, it->options[0]); |
62ed6662 BB |
853 | return -EIO; |
854 | } | |
855 | ||
856 | /* Typically brittle code that I don't completely understand, | |
857 | * but "it works on my card". The intent is to pull the model | |
858 | * number of the card out the PCMCIA CIS and stash it away as | |
859 | * the COMEDI board_name. Looks like the third field in | |
860 | * CISTPL_VERS_1 (offset 2) holds what we're looking for. If | |
861 | * it doesn't work, who cares, just leave it as "DAQP". | |
862 | */ | |
863 | ||
864 | strcpy(local->board_name, "DAQP"); | |
865 | dev->board_name = local->board_name; | |
55a19b39 DB |
866 | if (local->link->prod_id[2]) { |
867 | if (strncmp(local->link->prod_id[2], "DAQP", 4) == 0) { | |
868 | strncpy(local->board_name, local->link->prod_id[2], | |
869 | sizeof(local->board_name)); | |
62ed6662 BB |
870 | } |
871 | } | |
872 | ||
9a017a91 | 873 | dev->iobase = local->link->resource[0]->start; |
62ed6662 | 874 | |
c3744138 BP |
875 | ret = alloc_subdevices(dev, 4); |
876 | if (ret < 0) | |
62ed6662 BB |
877 | return ret; |
878 | ||
3420f6b4 | 879 | printk(KERN_INFO "comedi%d: attaching daqp%d (io 0x%04lx)\n", |
0a85b6f0 | 880 | dev->minor, it->options[0], dev->iobase); |
62ed6662 BB |
881 | |
882 | s = dev->subdevices + 0; | |
883 | dev->read_subdev = s; | |
884 | s->private = local; | |
885 | s->type = COMEDI_SUBD_AI; | |
886 | s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF | SDF_CMD_READ; | |
887 | s->n_chan = 8; | |
888 | s->len_chanlist = 2048; | |
889 | s->maxdata = 0xffff; | |
890 | s->range_table = &range_daqp_ai; | |
891 | s->insn_read = daqp_ai_insn_read; | |
892 | s->do_cmdtest = daqp_ai_cmdtest; | |
893 | s->do_cmd = daqp_ai_cmd; | |
894 | s->cancel = daqp_ai_cancel; | |
895 | ||
896 | s = dev->subdevices + 1; | |
897 | dev->write_subdev = s; | |
898 | s->private = local; | |
899 | s->type = COMEDI_SUBD_AO; | |
900 | s->subdev_flags = SDF_WRITEABLE; | |
901 | s->n_chan = 2; | |
902 | s->len_chanlist = 1; | |
903 | s->maxdata = 0x0fff; | |
904 | s->range_table = &range_daqp_ao; | |
905 | s->insn_write = daqp_ao_insn_write; | |
906 | ||
907 | s = dev->subdevices + 2; | |
908 | s->private = local; | |
909 | s->type = COMEDI_SUBD_DI; | |
910 | s->subdev_flags = SDF_READABLE; | |
911 | s->n_chan = 1; | |
912 | s->len_chanlist = 1; | |
913 | s->insn_read = daqp_di_insn_read; | |
914 | ||
915 | s = dev->subdevices + 3; | |
916 | s->private = local; | |
917 | s->type = COMEDI_SUBD_DO; | |
918 | s->subdev_flags = SDF_WRITEABLE; | |
919 | s->n_chan = 1; | |
920 | s->len_chanlist = 1; | |
921 | s->insn_write = daqp_do_insn_write; | |
922 | ||
923 | return 1; | |
924 | } | |
925 | ||
926 | /* daqp_detach (called from comedi_comdig) does nothing. If the PCMCIA | |
927 | * card is removed, daqp_cs_detach() is called by the pcmcia subsystem. | |
928 | */ | |
929 | ||
da91b269 | 930 | static int daqp_detach(struct comedi_device *dev) |
62ed6662 | 931 | { |
3420f6b4 | 932 | printk(KERN_INFO "comedi%d: detaching daqp\n", dev->minor); |
62ed6662 BB |
933 | |
934 | return 0; | |
935 | } | |
936 | ||
937 | /*==================================================================== | |
938 | ||
939 | PCMCIA interface code | |
940 | ||
941 | The rest of the code in this file is based on dummy_cs.c v1.24 | |
942 | from the Linux pcmcia_cs distribution v3.1.8 and is subject | |
943 | to the following license agreement. | |
944 | ||
945 | The remaining contents of this file are subject to the Mozilla Public | |
946 | License Version 1.1 (the "License"); you may not use this file | |
947 | except in compliance with the License. You may obtain a copy of | |
948 | the License at http://www.mozilla.org/MPL/ | |
949 | ||
950 | Software distributed under the License is distributed on an "AS | |
951 | IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or | |
952 | implied. See the License for the specific language governing | |
953 | rights and limitations under the License. | |
954 | ||
955 | The initial developer of the original code is David A. Hinds | |
956 | <dhinds@pcmcia.sourceforge.org>. Portions created by David A. Hinds | |
957 | are Copyright (C) 1999 David A. Hinds. All Rights Reserved. | |
958 | ||
959 | Alternatively, the contents of this file may be used under the | |
960 | terms of the GNU Public License version 2 (the "GPL"), in which | |
961 | case the provisions of the GPL are applicable instead of the | |
962 | above. If you wish to allow the use of your version of this file | |
963 | only under the terms of the GPL and not to allow others to use | |
964 | your version of this file under the MPL, indicate your decision | |
965 | by deleting the provisions above and replace them with the notice | |
966 | and other provisions required by the GPL. If you do not delete | |
967 | the provisions above, a recipient may use your version of this | |
968 | file under either the MPL or the GPL. | |
969 | ||
970 | ======================================================================*/ | |
971 | ||
972 | /* | |
973 | The event() function is this driver's Card Services event handler. | |
974 | It will be called by Card Services when an appropriate card status | |
975 | event is received. The config() and release() entry points are | |
976 | used to configure or release a socket, in response to card | |
977 | insertion and ejection events. | |
978 | ||
979 | Kernel version 2.6.16 upwards uses suspend() and resume() functions | |
980 | instead of an event() function. | |
981 | */ | |
982 | ||
983 | static void daqp_cs_config(struct pcmcia_device *link); | |
984 | static void daqp_cs_release(struct pcmcia_device *link); | |
985 | static int daqp_cs_suspend(struct pcmcia_device *p_dev); | |
986 | static int daqp_cs_resume(struct pcmcia_device *p_dev); | |
987 | ||
988 | /* | |
989 | The attach() and detach() entry points are used to create and destroy | |
990 | "instances" of the driver, where each instance represents everything | |
991 | needed to manage one actual PCMCIA card. | |
992 | */ | |
993 | ||
994 | static int daqp_cs_attach(struct pcmcia_device *); | |
995 | static void daqp_cs_detach(struct pcmcia_device *); | |
996 | ||
62ed6662 BB |
997 | /*====================================================================== |
998 | ||
999 | daqp_cs_attach() creates an "instance" of the driver, allocating | |
1000 | local data structures for one device. The device is registered | |
1001 | with Card Services. | |
1002 | ||
1003 | The dev_link structure is initialized, but we don't actually | |
1004 | configure the card at this point -- we wait until we receive a | |
1005 | card insertion event. | |
1006 | ||
1007 | ======================================================================*/ | |
1008 | ||
1009 | static int daqp_cs_attach(struct pcmcia_device *link) | |
1010 | { | |
ab64f663 | 1011 | struct local_info_t *local; |
62ed6662 BB |
1012 | int i; |
1013 | ||
55a19b39 | 1014 | dev_dbg(&link->dev, "daqp_cs_attach()\n"); |
62ed6662 BB |
1015 | |
1016 | for (i = 0; i < MAX_DEV; i++) | |
1017 | if (dev_table[i] == NULL) | |
1018 | break; | |
1019 | if (i == MAX_DEV) { | |
1020 | printk(KERN_NOTICE "daqp_cs: no devices available\n"); | |
1021 | return -ENODEV; | |
1022 | } | |
1023 | ||
1024 | /* Allocate space for private device-specific data */ | |
ab64f663 | 1025 | local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL); |
62ed6662 BB |
1026 | if (!local) |
1027 | return -ENOMEM; | |
1028 | ||
1029 | local->table_index = i; | |
1030 | dev_table[i] = local; | |
1031 | local->link = link; | |
1032 | link->priv = local; | |
1033 | ||
62ed6662 BB |
1034 | /* |
1035 | General socket configuration defaults can go here. In this | |
1036 | client, we assume very little, and rely on the CIS for almost | |
1037 | everything. In most clients, many details (i.e., number, sizes, | |
1038 | and attributes of IO windows) are fixed by the nature of the | |
1039 | device, and can be hard-wired here. | |
1040 | */ | |
1041 | link->conf.Attributes = 0; | |
1042 | link->conf.IntType = INT_MEMORY_AND_IO; | |
1043 | ||
1044 | daqp_cs_config(link); | |
1045 | ||
1046 | return 0; | |
1047 | } /* daqp_cs_attach */ | |
1048 | ||
1049 | /*====================================================================== | |
1050 | ||
1051 | This deletes a driver "instance". The device is de-registered | |
1052 | with Card Services. If it has been released, all local data | |
1053 | structures are freed. Otherwise, the structures will be freed | |
1054 | when the device is released. | |
1055 | ||
1056 | ======================================================================*/ | |
1057 | ||
1058 | static void daqp_cs_detach(struct pcmcia_device *link) | |
1059 | { | |
ab64f663 | 1060 | struct local_info_t *dev = link->priv; |
62ed6662 | 1061 | |
55a19b39 | 1062 | dev_dbg(&link->dev, "daqp_cs_detach\n"); |
62ed6662 | 1063 | |
7622802e JMC |
1064 | dev->stop = 1; |
1065 | daqp_cs_release(link); | |
62ed6662 BB |
1066 | |
1067 | /* Unlink device structure, and free it */ | |
1068 | dev_table[dev->table_index] = NULL; | |
f25bd6bf | 1069 | kfree(dev); |
62ed6662 BB |
1070 | |
1071 | } /* daqp_cs_detach */ | |
1072 | ||
1073 | /*====================================================================== | |
1074 | ||
1075 | daqp_cs_config() is scheduled to run after a CARD_INSERTION event | |
1076 | is received, to configure the PCMCIA socket, and to make the | |
1077 | device available to the system. | |
1078 | ||
1079 | ======================================================================*/ | |
1080 | ||
c3744138 | 1081 | |
55a19b39 DB |
1082 | static int daqp_pcmcia_config_loop(struct pcmcia_device *p_dev, |
1083 | cistpl_cftable_entry_t *cfg, | |
1084 | cistpl_cftable_entry_t *dflt, | |
1085 | unsigned int vcc, | |
1086 | void *priv_data) | |
1087 | { | |
1088 | if (cfg->index == 0) | |
1089 | return -ENODEV; | |
62ed6662 | 1090 | |
55a19b39 | 1091 | /* Do we need to allocate an interrupt? */ |
eb14120f | 1092 | p_dev->conf.Attributes |= CONF_ENABLE_IRQ; |
55a19b39 DB |
1093 | |
1094 | /* IO window settings */ | |
90abdc3b | 1095 | p_dev->resource[0]->end = p_dev->resource[1]->end = 0; |
55a19b39 DB |
1096 | if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) { |
1097 | cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io; | |
90abdc3b DB |
1098 | p_dev->io_lines = io->flags & CISTPL_IO_LINES_MASK; |
1099 | p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH; | |
1100 | p_dev->resource[0]->flags |= | |
1101 | pcmcia_io_cfg_data_width(io->flags); | |
1102 | p_dev->resource[0]->start = io->win[0].base; | |
1103 | p_dev->resource[0]->end = io->win[0].len; | |
55a19b39 | 1104 | if (io->nwin > 1) { |
90abdc3b DB |
1105 | p_dev->resource[1]->flags = p_dev->resource[0]->flags; |
1106 | p_dev->resource[1]->start = io->win[1].base; | |
1107 | p_dev->resource[1]->end = io->win[1].len; | |
55a19b39 | 1108 | } |
62ed6662 | 1109 | } |
c3744138 | 1110 | |
55a19b39 | 1111 | /* This reserves IO space but doesn't actually enable it */ |
90abdc3b | 1112 | return pcmcia_request_io(p_dev); |
55a19b39 | 1113 | } |
62ed6662 | 1114 | |
55a19b39 DB |
1115 | static void daqp_cs_config(struct pcmcia_device *link) |
1116 | { | |
55a19b39 | 1117 | int ret; |
62ed6662 | 1118 | |
55a19b39 | 1119 | dev_dbg(&link->dev, "daqp_cs_config\n"); |
62ed6662 | 1120 | |
55a19b39 DB |
1121 | ret = pcmcia_loop_config(link, daqp_pcmcia_config_loop, NULL); |
1122 | if (ret) { | |
1123 | dev_warn(&link->dev, "no configuration found\n"); | |
1124 | goto failed; | |
62ed6662 BB |
1125 | } |
1126 | ||
eb14120f DB |
1127 | ret = pcmcia_request_irq(link, daqp_interrupt); |
1128 | if (ret) | |
1129 | goto failed; | |
62ed6662 BB |
1130 | |
1131 | /* | |
1132 | This actually configures the PCMCIA socket -- setting up | |
1133 | the I/O windows and the interrupt mapping, and putting the | |
1134 | card and host interface into "Memory and IO" mode. | |
1135 | */ | |
55a19b39 DB |
1136 | ret = pcmcia_request_configuration(link, &link->conf); |
1137 | if (ret) | |
1138 | goto failed; | |
62ed6662 | 1139 | |
62ed6662 | 1140 | /* Finally, report what we've done */ |
7622802e | 1141 | dev_info(&link->dev, "index 0x%02x", link->conf.ConfigIndex); |
62ed6662 | 1142 | if (link->conf.Attributes & CONF_ENABLE_IRQ) |
eb14120f | 1143 | printk(", irq %u", link->irq); |
9a017a91 DB |
1144 | if (link->resource[0]) |
1145 | printk(" & %pR", link->resource[0]); | |
1146 | if (link->resource[1]) | |
1147 | printk(" & %pR", link->resource[1]); | |
62ed6662 BB |
1148 | printk("\n"); |
1149 | ||
1150 | return; | |
1151 | ||
55a19b39 | 1152 | failed: |
62ed6662 BB |
1153 | daqp_cs_release(link); |
1154 | ||
1155 | } /* daqp_cs_config */ | |
1156 | ||
1157 | static void daqp_cs_release(struct pcmcia_device *link) | |
1158 | { | |
55a19b39 | 1159 | dev_dbg(&link->dev, "daqp_cs_release\n"); |
62ed6662 BB |
1160 | |
1161 | pcmcia_disable_device(link); | |
1162 | } /* daqp_cs_release */ | |
1163 | ||
1164 | /*====================================================================== | |
1165 | ||
1166 | The card status event handler. Mostly, this schedules other | |
1167 | stuff to run after an event is received. | |
1168 | ||
1169 | When a CARD_REMOVAL event is received, we immediately set a | |
1170 | private flag to block future accesses to this device. All the | |
1171 | functions that actually access the device should check this flag | |
1172 | to make sure the card is still present. | |
1173 | ||
1174 | ======================================================================*/ | |
1175 | ||
1176 | static int daqp_cs_suspend(struct pcmcia_device *link) | |
1177 | { | |
ab64f663 | 1178 | struct local_info_t *local = link->priv; |
62ed6662 BB |
1179 | |
1180 | /* Mark the device as stopped, to block IO until later */ | |
1181 | local->stop = 1; | |
1182 | return 0; | |
1183 | } | |
1184 | ||
1185 | static int daqp_cs_resume(struct pcmcia_device *link) | |
1186 | { | |
ab64f663 | 1187 | struct local_info_t *local = link->priv; |
62ed6662 BB |
1188 | |
1189 | local->stop = 0; | |
1190 | ||
1191 | return 0; | |
1192 | } | |
1193 | ||
1194 | /*====================================================================*/ | |
1195 | ||
1196 | #ifdef MODULE | |
1197 | ||
1198 | static struct pcmcia_device_id daqp_cs_id_table[] = { | |
1199 | PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0027), | |
1200 | PCMCIA_DEVICE_NULL | |
1201 | }; | |
1202 | ||
1203 | MODULE_DEVICE_TABLE(pcmcia, daqp_cs_id_table); | |
6c7f8196 AK |
1204 | MODULE_AUTHOR("Brent Baccala <baccala@freesoft.org>"); |
1205 | MODULE_DESCRIPTION("Comedi driver for Quatech DAQP PCMCIA data capture cards"); | |
1206 | MODULE_LICENSE("GPL"); | |
62ed6662 | 1207 | |
e3752a1d | 1208 | static struct pcmcia_driver daqp_cs_driver = { |
62ed6662 BB |
1209 | .probe = daqp_cs_attach, |
1210 | .remove = daqp_cs_detach, | |
1211 | .suspend = daqp_cs_suspend, | |
1212 | .resume = daqp_cs_resume, | |
1213 | .id_table = daqp_cs_id_table, | |
1214 | .owner = THIS_MODULE, | |
1215 | .drv = { | |
1685e633 | 1216 | .name = "quatech_daqp_cs", |
62ed6662 BB |
1217 | }, |
1218 | }; | |
1219 | ||
1220 | int __init init_module(void) | |
1221 | { | |
62ed6662 BB |
1222 | pcmcia_register_driver(&daqp_cs_driver); |
1223 | comedi_driver_register(&driver_daqp); | |
1224 | return 0; | |
1225 | } | |
1226 | ||
1227 | void __exit cleanup_module(void) | |
1228 | { | |
62ed6662 BB |
1229 | comedi_driver_unregister(&driver_daqp); |
1230 | pcmcia_unregister_driver(&daqp_cs_driver); | |
1231 | } | |
1232 | ||
1233 | #endif |