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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/cistpl.h> |
54 | #include <pcmcia/cisreg.h> | |
55 | #include <pcmcia/ds.h> | |
56 | ||
7ec52ed2 AIB |
57 | #include <linux/completion.h> |
58 | ||
62ed6662 BB |
59 | /* Maximum number of separate DAQP devices we'll allow */ |
60 | #define MAX_DEV 4 | |
61 | ||
ab64f663 | 62 | struct local_info_t { |
62ed6662 | 63 | struct pcmcia_device *link; |
62ed6662 BB |
64 | int stop; |
65 | int table_index; | |
66 | char board_name[32]; | |
67 | ||
68 | enum { semaphore, buffer } interrupt_mode; | |
69 | ||
7ec52ed2 | 70 | struct completion eos; |
62ed6662 | 71 | |
71b5f4f1 | 72 | struct comedi_device *dev; |
34c43922 | 73 | struct comedi_subdevice *s; |
62ed6662 | 74 | int count; |
ab64f663 | 75 | }; |
62ed6662 BB |
76 | |
77 | /* A list of "instances" of the device. */ | |
78 | ||
ab64f663 | 79 | static struct local_info_t *dev_table[MAX_DEV] = { NULL, /* ... */ }; |
62ed6662 BB |
80 | |
81 | /* The DAQP communicates with the system through a 16 byte I/O window. */ | |
82 | ||
83 | #define DAQP_FIFO_SIZE 4096 | |
84 | ||
85 | #define DAQP_FIFO 0 | |
86 | #define DAQP_SCANLIST 1 | |
87 | #define DAQP_CONTROL 2 | |
88 | #define DAQP_STATUS 2 | |
89 | #define DAQP_DIGITAL_IO 3 | |
90 | #define DAQP_PACER_LOW 4 | |
91 | #define DAQP_PACER_MID 5 | |
92 | #define DAQP_PACER_HIGH 6 | |
93 | #define DAQP_COMMAND 7 | |
94 | #define DAQP_DA 8 | |
95 | #define DAQP_TIMER 10 | |
96 | #define DAQP_AUX 15 | |
97 | ||
98 | #define DAQP_SCANLIST_DIFFERENTIAL 0x4000 | |
99 | #define DAQP_SCANLIST_GAIN(x) ((x)<<12) | |
100 | #define DAQP_SCANLIST_CHANNEL(x) ((x)<<8) | |
101 | #define DAQP_SCANLIST_START 0x0080 | |
102 | #define DAQP_SCANLIST_EXT_GAIN(x) ((x)<<4) | |
103 | #define DAQP_SCANLIST_EXT_CHANNEL(x) (x) | |
104 | ||
105 | #define DAQP_CONTROL_PACER_100kHz 0xc0 | |
106 | #define DAQP_CONTROL_PACER_1MHz 0x80 | |
107 | #define DAQP_CONTROL_PACER_5MHz 0x40 | |
108 | #define DAQP_CONTROL_PACER_EXTERNAL 0x00 | |
109 | #define DAQP_CONTORL_EXPANSION 0x20 | |
110 | #define DAQP_CONTROL_EOS_INT_ENABLE 0x10 | |
111 | #define DAQP_CONTROL_FIFO_INT_ENABLE 0x08 | |
112 | #define DAQP_CONTROL_TRIGGER_ONESHOT 0x00 | |
113 | #define DAQP_CONTROL_TRIGGER_CONTINUOUS 0x04 | |
114 | #define DAQP_CONTROL_TRIGGER_INTERNAL 0x00 | |
115 | #define DAQP_CONTROL_TRIGGER_EXTERNAL 0x02 | |
116 | #define DAQP_CONTROL_TRIGGER_RISING 0x00 | |
117 | #define DAQP_CONTROL_TRIGGER_FALLING 0x01 | |
118 | ||
119 | #define DAQP_STATUS_IDLE 0x80 | |
120 | #define DAQP_STATUS_RUNNING 0x40 | |
121 | #define DAQP_STATUS_EVENTS 0x38 | |
122 | #define DAQP_STATUS_DATA_LOST 0x20 | |
123 | #define DAQP_STATUS_END_OF_SCAN 0x10 | |
124 | #define DAQP_STATUS_FIFO_THRESHOLD 0x08 | |
125 | #define DAQP_STATUS_FIFO_FULL 0x04 | |
126 | #define DAQP_STATUS_FIFO_NEARFULL 0x02 | |
127 | #define DAQP_STATUS_FIFO_EMPTY 0x01 | |
128 | ||
129 | #define DAQP_COMMAND_ARM 0x80 | |
130 | #define DAQP_COMMAND_RSTF 0x40 | |
131 | #define DAQP_COMMAND_RSTQ 0x20 | |
132 | #define DAQP_COMMAND_STOP 0x10 | |
133 | #define DAQP_COMMAND_LATCH 0x08 | |
134 | #define DAQP_COMMAND_100kHz 0x00 | |
135 | #define DAQP_COMMAND_50kHz 0x02 | |
136 | #define DAQP_COMMAND_25kHz 0x04 | |
137 | #define DAQP_COMMAND_FIFO_DATA 0x01 | |
138 | #define DAQP_COMMAND_FIFO_PROGRAM 0x00 | |
139 | ||
140 | #define DAQP_AUX_TRIGGER_TTL 0x00 | |
141 | #define DAQP_AUX_TRIGGER_ANALOG 0x80 | |
142 | #define DAQP_AUX_TRIGGER_PRETRIGGER 0x40 | |
143 | #define DAQP_AUX_TIMER_INT_ENABLE 0x20 | |
144 | #define DAQP_AUX_TIMER_RELOAD 0x00 | |
145 | #define DAQP_AUX_TIMER_PAUSE 0x08 | |
146 | #define DAQP_AUX_TIMER_GO 0x10 | |
147 | #define DAQP_AUX_TIMER_GO_EXTERNAL 0x18 | |
148 | #define DAQP_AUX_TIMER_EXTERNAL_SRC 0x04 | |
149 | #define DAQP_AUX_TIMER_INTERNAL_SRC 0x00 | |
150 | #define DAQP_AUX_DA_DIRECT 0x00 | |
151 | #define DAQP_AUX_DA_OVERFLOW 0x01 | |
152 | #define DAQP_AUX_DA_EXTERNAL 0x02 | |
153 | #define DAQP_AUX_DA_PACER 0x03 | |
154 | ||
155 | #define DAQP_AUX_RUNNING 0x80 | |
156 | #define DAQP_AUX_TRIGGERED 0x40 | |
157 | #define DAQP_AUX_DA_BUFFER 0x20 | |
158 | #define DAQP_AUX_TIMER_OVERFLOW 0x10 | |
159 | #define DAQP_AUX_CONVERSION 0x08 | |
160 | #define DAQP_AUX_DATA_LOST 0x04 | |
161 | #define DAQP_AUX_FIFO_NEARFULL 0x02 | |
162 | #define DAQP_AUX_FIFO_EMPTY 0x01 | |
163 | ||
164 | /* These range structures tell COMEDI how the sample values map to | |
68c3dbff BP |
165 | * voltages. The A/D converter has four .ranges = +/- 10V through |
166 | * +/- 1.25V, and the D/A converter has only .one = +/- 5V. | |
62ed6662 BB |
167 | */ |
168 | ||
9ced1de6 | 169 | static const struct comedi_lrange range_daqp_ai = { 4, { |
0a85b6f0 MT |
170 | BIP_RANGE(10), |
171 | BIP_RANGE(5), | |
172 | BIP_RANGE(2.5), | |
173 | BIP_RANGE(1.25) | |
174 | } | |
62ed6662 BB |
175 | }; |
176 | ||
9ced1de6 | 177 | static const struct comedi_lrange range_daqp_ao = { 1, {BIP_RANGE(5)} }; |
62ed6662 BB |
178 | |
179 | /*====================================================================*/ | |
180 | ||
181 | /* comedi interface code */ | |
182 | ||
da91b269 BP |
183 | static int daqp_attach(struct comedi_device *dev, struct comedi_devconfig *it); |
184 | static int daqp_detach(struct comedi_device *dev); | |
139dfbdf | 185 | static struct comedi_driver driver_daqp = { |
68c3dbff BP |
186 | .driver_name = "quatech_daqp_cs", |
187 | .module = THIS_MODULE, | |
188 | .attach = daqp_attach, | |
189 | .detach = daqp_detach, | |
62ed6662 BB |
190 | }; |
191 | ||
192 | #ifdef DAQP_DEBUG | |
193 | ||
da91b269 | 194 | static void daqp_dump(struct comedi_device *dev) |
62ed6662 | 195 | { |
3420f6b4 | 196 | printk(KERN_INFO "DAQP: status %02x; aux status %02x\n", |
0a85b6f0 | 197 | inb(dev->iobase + DAQP_STATUS), inb(dev->iobase + DAQP_AUX)); |
62ed6662 BB |
198 | } |
199 | ||
200 | static void hex_dump(char *str, void *ptr, int len) | |
201 | { | |
202 | unsigned char *cptr = ptr; | |
203 | int i; | |
204 | ||
205 | printk(str); | |
206 | ||
207 | for (i = 0; i < len; i++) { | |
3420f6b4 | 208 | if (i % 16 == 0) |
5fc9e4d5 | 209 | printk("\n%p:", cptr); |
3420f6b4 | 210 | |
62ed6662 BB |
211 | printk(" %02x", *(cptr++)); |
212 | } | |
213 | printk("\n"); | |
214 | } | |
215 | ||
216 | #endif | |
217 | ||
218 | /* Cancel a running acquisition */ | |
219 | ||
da91b269 | 220 | static int daqp_ai_cancel(struct comedi_device *dev, struct comedi_subdevice *s) |
62ed6662 | 221 | { |
0a85b6f0 | 222 | struct local_info_t *local = (struct local_info_t *)s->private; |
62ed6662 | 223 | |
3420f6b4 | 224 | if (local->stop) |
62ed6662 | 225 | return -EIO; |
3420f6b4 | 226 | |
62ed6662 BB |
227 | |
228 | outb(DAQP_COMMAND_STOP, dev->iobase + DAQP_COMMAND); | |
229 | ||
230 | /* flush any linguring data in FIFO - superfluous here */ | |
231 | /* outb(DAQP_COMMAND_RSTF, dev->iobase+DAQP_COMMAND); */ | |
232 | ||
233 | local->interrupt_mode = semaphore; | |
234 | ||
235 | return 0; | |
236 | } | |
237 | ||
238 | /* Interrupt handler | |
239 | * | |
240 | * Operates in one of two modes. If local->interrupt_mode is | |
7ec52ed2 | 241 | * 'semaphore', just signal the local->eos completion and return |
62ed6662 BB |
242 | * (one-shot mode). Otherwise (continuous mode), read data in from |
243 | * the card, transfer it to the buffer provided by the higher-level | |
244 | * comedi kernel module, and signal various comedi callback routines, | |
245 | * which run pretty quick. | |
246 | */ | |
e3752a1d | 247 | static enum irqreturn daqp_interrupt(int irq, void *dev_id) |
62ed6662 | 248 | { |
0a85b6f0 | 249 | struct local_info_t *local = (struct local_info_t *)dev_id; |
71b5f4f1 | 250 | struct comedi_device *dev; |
34c43922 | 251 | struct comedi_subdevice *s; |
62ed6662 BB |
252 | int loop_limit = 10000; |
253 | int status; | |
254 | ||
255 | if (local == NULL) { | |
256 | printk(KERN_WARNING | |
0a85b6f0 | 257 | "daqp_interrupt(): irq %d for unknown device.\n", irq); |
e3752a1d | 258 | return IRQ_NONE; |
62ed6662 BB |
259 | } |
260 | ||
261 | dev = local->dev; | |
262 | if (dev == NULL) { | |
263 | printk(KERN_WARNING "daqp_interrupt(): NULL comedi_device.\n"); | |
e3752a1d | 264 | return IRQ_NONE; |
62ed6662 BB |
265 | } |
266 | ||
267 | if (!dev->attached) { | |
268 | printk(KERN_WARNING | |
0a85b6f0 | 269 | "daqp_interrupt(): struct comedi_device not yet attached.\n"); |
e3752a1d | 270 | return IRQ_NONE; |
62ed6662 BB |
271 | } |
272 | ||
273 | s = local->s; | |
274 | if (s == NULL) { | |
275 | printk(KERN_WARNING | |
0a85b6f0 | 276 | "daqp_interrupt(): NULL comedi_subdevice.\n"); |
e3752a1d | 277 | return IRQ_NONE; |
62ed6662 BB |
278 | } |
279 | ||
0a85b6f0 | 280 | if ((struct local_info_t *)s->private != local) { |
62ed6662 | 281 | printk(KERN_WARNING |
0a85b6f0 | 282 | "daqp_interrupt(): invalid comedi_subdevice.\n"); |
e3752a1d | 283 | return IRQ_NONE; |
62ed6662 BB |
284 | } |
285 | ||
286 | switch (local->interrupt_mode) { | |
287 | ||
288 | case semaphore: | |
289 | ||
7ec52ed2 | 290 | complete(&local->eos); |
62ed6662 BB |
291 | break; |
292 | ||
293 | case buffer: | |
294 | ||
295 | while (!((status = inb(dev->iobase + DAQP_STATUS)) | |
0a85b6f0 | 296 | & DAQP_STATUS_FIFO_EMPTY)) { |
62ed6662 | 297 | |
790c5541 | 298 | short data; |
62ed6662 BB |
299 | |
300 | if (status & DAQP_STATUS_DATA_LOST) { | |
301 | s->async->events |= | |
0a85b6f0 | 302 | COMEDI_CB_EOA | COMEDI_CB_OVERFLOW; |
62ed6662 BB |
303 | printk("daqp: data lost\n"); |
304 | daqp_ai_cancel(dev, s); | |
305 | break; | |
306 | } | |
307 | ||
308 | data = inb(dev->iobase + DAQP_FIFO); | |
309 | data |= inb(dev->iobase + DAQP_FIFO) << 8; | |
310 | data ^= 0x8000; | |
311 | ||
312 | comedi_buf_put(s->async, data); | |
313 | ||
314 | /* If there's a limit, decrement it | |
315 | * and stop conversion if zero | |
316 | */ | |
317 | ||
318 | if (local->count > 0) { | |
319 | local->count--; | |
320 | if (local->count == 0) { | |
321 | daqp_ai_cancel(dev, s); | |
322 | s->async->events |= COMEDI_CB_EOA; | |
323 | break; | |
324 | } | |
325 | } | |
326 | ||
327 | if ((loop_limit--) <= 0) | |
328 | break; | |
329 | } | |
330 | ||
331 | if (loop_limit <= 0) { | |
332 | printk(KERN_WARNING | |
0a85b6f0 | 333 | "loop_limit reached in daqp_interrupt()\n"); |
62ed6662 BB |
334 | daqp_ai_cancel(dev, s); |
335 | s->async->events |= COMEDI_CB_EOA | COMEDI_CB_ERROR; | |
336 | } | |
337 | ||
338 | s->async->events |= COMEDI_CB_BLOCK; | |
339 | ||
340 | comedi_event(dev, s); | |
341 | } | |
e3752a1d | 342 | return IRQ_HANDLED; |
62ed6662 BB |
343 | } |
344 | ||
345 | /* One-shot analog data acquisition routine */ | |
346 | ||
0a85b6f0 MT |
347 | static int daqp_ai_insn_read(struct comedi_device *dev, |
348 | struct comedi_subdevice *s, | |
349 | struct comedi_insn *insn, unsigned int *data) | |
62ed6662 | 350 | { |
0a85b6f0 | 351 | struct local_info_t *local = (struct local_info_t *)s->private; |
62ed6662 BB |
352 | int i; |
353 | int v; | |
354 | int counter = 10000; | |
355 | ||
3420f6b4 | 356 | if (local->stop) |
62ed6662 | 357 | return -EIO; |
3420f6b4 | 358 | |
62ed6662 BB |
359 | |
360 | /* Stop any running conversion */ | |
361 | daqp_ai_cancel(dev, s); | |
362 | ||
363 | outb(0, dev->iobase + DAQP_AUX); | |
364 | ||
365 | /* Reset scan list queue */ | |
366 | outb(DAQP_COMMAND_RSTQ, dev->iobase + DAQP_COMMAND); | |
367 | ||
368 | /* Program one scan list entry */ | |
369 | ||
370 | v = DAQP_SCANLIST_CHANNEL(CR_CHAN(insn->chanspec)) | |
0a85b6f0 | 371 | | DAQP_SCANLIST_GAIN(CR_RANGE(insn->chanspec)); |
62ed6662 | 372 | |
3420f6b4 | 373 | if (CR_AREF(insn->chanspec) == AREF_DIFF) |
62ed6662 | 374 | v |= DAQP_SCANLIST_DIFFERENTIAL; |
3420f6b4 | 375 | |
62ed6662 BB |
376 | |
377 | v |= DAQP_SCANLIST_START; | |
378 | ||
379 | outb(v & 0xff, dev->iobase + DAQP_SCANLIST); | |
380 | outb(v >> 8, dev->iobase + DAQP_SCANLIST); | |
381 | ||
382 | /* Reset data FIFO (see page 28 of DAQP User's Manual) */ | |
383 | ||
384 | outb(DAQP_COMMAND_RSTF, dev->iobase + DAQP_COMMAND); | |
385 | ||
386 | /* Set trigger */ | |
387 | ||
388 | v = DAQP_CONTROL_TRIGGER_ONESHOT | DAQP_CONTROL_TRIGGER_INTERNAL | |
0a85b6f0 | 389 | | DAQP_CONTROL_PACER_100kHz | DAQP_CONTROL_EOS_INT_ENABLE; |
62ed6662 BB |
390 | |
391 | outb(v, dev->iobase + DAQP_CONTROL); | |
392 | ||
393 | /* Reset any pending interrupts (my card has a tendancy to require | |
394 | * require multiple reads on the status register to achieve this) | |
395 | */ | |
396 | ||
397 | while (--counter | |
0a85b6f0 | 398 | && (inb(dev->iobase + DAQP_STATUS) & DAQP_STATUS_EVENTS)) ; |
62ed6662 BB |
399 | if (!counter) { |
400 | printk("daqp: couldn't clear interrupts in status register\n"); | |
401 | return -1; | |
402 | } | |
403 | ||
7ec52ed2 | 404 | init_completion(&local->eos); |
62ed6662 BB |
405 | local->interrupt_mode = semaphore; |
406 | local->dev = dev; | |
407 | local->s = s; | |
408 | ||
409 | for (i = 0; i < insn->n; i++) { | |
410 | ||
411 | /* Start conversion */ | |
412 | outb(DAQP_COMMAND_ARM | DAQP_COMMAND_FIFO_DATA, | |
0a85b6f0 | 413 | dev->iobase + DAQP_COMMAND); |
62ed6662 | 414 | |
7ec52ed2 | 415 | /* Wait for interrupt service routine to unblock completion */ |
62ed6662 | 416 | /* Maybe could use a timeout here, but it's interruptible */ |
7ec52ed2 | 417 | if (wait_for_completion_interruptible(&local->eos)) |
62ed6662 BB |
418 | return -EINTR; |
419 | ||
420 | data[i] = inb(dev->iobase + DAQP_FIFO); | |
421 | data[i] |= inb(dev->iobase + DAQP_FIFO) << 8; | |
422 | data[i] ^= 0x8000; | |
423 | } | |
424 | ||
425 | return insn->n; | |
426 | } | |
427 | ||
428 | /* This function converts ns nanoseconds to a counter value suitable | |
429 | * for programming the device. We always use the DAQP's 5 MHz clock, | |
430 | * which with its 24-bit counter, allows values up to 84 seconds. | |
431 | * Also, the function adjusts ns so that it cooresponds to the actual | |
432 | * time that the device will use. | |
433 | */ | |
434 | ||
435 | static int daqp_ns_to_timer(unsigned int *ns, int round) | |
436 | { | |
437 | int timer; | |
438 | ||
439 | timer = *ns / 200; | |
440 | *ns = timer * 200; | |
441 | ||
442 | return timer; | |
443 | } | |
444 | ||
445 | /* cmdtest tests a particular command to see if it is valid. | |
446 | * Using the cmdtest ioctl, a user can create a valid cmd | |
447 | * and then have it executed by the cmd ioctl. | |
448 | * | |
449 | * cmdtest returns 1,2,3,4 or 0, depending on which tests | |
450 | * the command passes. | |
451 | */ | |
452 | ||
0a85b6f0 MT |
453 | static int daqp_ai_cmdtest(struct comedi_device *dev, |
454 | struct comedi_subdevice *s, struct comedi_cmd *cmd) | |
62ed6662 BB |
455 | { |
456 | int err = 0; | |
457 | int tmp; | |
458 | ||
459 | /* step 1: make sure trigger sources are trivially valid */ | |
460 | ||
461 | tmp = cmd->start_src; | |
462 | cmd->start_src &= TRIG_NOW; | |
463 | if (!cmd->start_src || tmp != cmd->start_src) | |
464 | err++; | |
465 | ||
466 | tmp = cmd->scan_begin_src; | |
467 | cmd->scan_begin_src &= TRIG_TIMER | TRIG_FOLLOW; | |
468 | if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src) | |
469 | err++; | |
470 | ||
471 | tmp = cmd->convert_src; | |
472 | cmd->convert_src &= TRIG_TIMER | TRIG_NOW; | |
473 | if (!cmd->convert_src || tmp != cmd->convert_src) | |
474 | err++; | |
475 | ||
476 | tmp = cmd->scan_end_src; | |
477 | cmd->scan_end_src &= TRIG_COUNT; | |
478 | if (!cmd->scan_end_src || tmp != cmd->scan_end_src) | |
479 | err++; | |
480 | ||
481 | tmp = cmd->stop_src; | |
482 | cmd->stop_src &= TRIG_COUNT | TRIG_NONE; | |
483 | if (!cmd->stop_src || tmp != cmd->stop_src) | |
484 | err++; | |
485 | ||
486 | if (err) | |
487 | return 1; | |
488 | ||
3420f6b4 GS |
489 | /* |
490 | * step 2: make sure trigger sources | |
491 | * are unique and mutually compatible | |
492 | */ | |
62ed6662 | 493 | |
828684f9 | 494 | /* note that mutual compatibility is not an issue here */ |
62ed6662 | 495 | if (cmd->scan_begin_src != TRIG_TIMER && |
0a85b6f0 | 496 | cmd->scan_begin_src != TRIG_FOLLOW) |
62ed6662 BB |
497 | err++; |
498 | if (cmd->convert_src != TRIG_NOW && cmd->convert_src != TRIG_TIMER) | |
499 | err++; | |
500 | if (cmd->scan_begin_src == TRIG_FOLLOW && cmd->convert_src == TRIG_NOW) | |
501 | err++; | |
502 | if (cmd->stop_src != TRIG_COUNT && cmd->stop_src != TRIG_NONE) | |
503 | err++; | |
504 | ||
505 | if (err) | |
506 | return 2; | |
507 | ||
508 | /* step 3: make sure arguments are trivially compatible */ | |
509 | ||
510 | if (cmd->start_arg != 0) { | |
511 | cmd->start_arg = 0; | |
512 | err++; | |
513 | } | |
514 | #define MAX_SPEED 10000 /* 100 kHz - in nanoseconds */ | |
515 | ||
516 | if (cmd->scan_begin_src == TRIG_TIMER | |
0a85b6f0 | 517 | && cmd->scan_begin_arg < MAX_SPEED) { |
62ed6662 BB |
518 | cmd->scan_begin_arg = MAX_SPEED; |
519 | err++; | |
520 | } | |
521 | ||
522 | /* If both scan_begin and convert are both timer values, the only | |
523 | * way that can make sense is if the scan time is the number of | |
524 | * conversions times the convert time | |
525 | */ | |
526 | ||
527 | if (cmd->scan_begin_src == TRIG_TIMER && cmd->convert_src == TRIG_TIMER | |
0a85b6f0 | 528 | && cmd->scan_begin_arg != cmd->convert_arg * cmd->scan_end_arg) { |
62ed6662 BB |
529 | err++; |
530 | } | |
531 | ||
532 | if (cmd->convert_src == TRIG_TIMER && cmd->convert_arg < MAX_SPEED) { | |
533 | cmd->convert_arg = MAX_SPEED; | |
534 | err++; | |
535 | } | |
536 | ||
537 | if (cmd->scan_end_arg != cmd->chanlist_len) { | |
538 | cmd->scan_end_arg = cmd->chanlist_len; | |
539 | err++; | |
540 | } | |
541 | if (cmd->stop_src == TRIG_COUNT) { | |
542 | if (cmd->stop_arg > 0x00ffffff) { | |
543 | cmd->stop_arg = 0x00ffffff; | |
544 | err++; | |
545 | } | |
546 | } else { | |
547 | /* TRIG_NONE */ | |
548 | if (cmd->stop_arg != 0) { | |
549 | cmd->stop_arg = 0; | |
550 | err++; | |
551 | } | |
552 | } | |
553 | ||
554 | if (err) | |
555 | return 3; | |
556 | ||
557 | /* step 4: fix up any arguments */ | |
558 | ||
559 | if (cmd->scan_begin_src == TRIG_TIMER) { | |
560 | tmp = cmd->scan_begin_arg; | |
561 | daqp_ns_to_timer(&cmd->scan_begin_arg, | |
0a85b6f0 | 562 | cmd->flags & TRIG_ROUND_MASK); |
62ed6662 BB |
563 | if (tmp != cmd->scan_begin_arg) |
564 | err++; | |
565 | } | |
566 | ||
567 | if (cmd->convert_src == TRIG_TIMER) { | |
568 | tmp = cmd->convert_arg; | |
569 | daqp_ns_to_timer(&cmd->convert_arg, | |
0a85b6f0 | 570 | cmd->flags & TRIG_ROUND_MASK); |
62ed6662 BB |
571 | if (tmp != cmd->convert_arg) |
572 | err++; | |
573 | } | |
574 | ||
575 | if (err) | |
576 | return 4; | |
577 | ||
578 | return 0; | |
579 | } | |
580 | ||
da91b269 | 581 | static int daqp_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s) |
62ed6662 | 582 | { |
0a85b6f0 | 583 | struct local_info_t *local = (struct local_info_t *)s->private; |
ea6d0d4c | 584 | struct comedi_cmd *cmd = &s->async->cmd; |
e3752a1d | 585 | int counter; |
62ed6662 BB |
586 | int scanlist_start_on_every_entry; |
587 | int threshold; | |
588 | ||
589 | int i; | |
590 | int v; | |
591 | ||
3420f6b4 | 592 | if (local->stop) |
62ed6662 | 593 | return -EIO; |
3420f6b4 | 594 | |
62ed6662 BB |
595 | |
596 | /* Stop any running conversion */ | |
597 | daqp_ai_cancel(dev, s); | |
598 | ||
599 | outb(0, dev->iobase + DAQP_AUX); | |
600 | ||
601 | /* Reset scan list queue */ | |
602 | outb(DAQP_COMMAND_RSTQ, dev->iobase + DAQP_COMMAND); | |
603 | ||
604 | /* Program pacer clock | |
605 | * | |
606 | * There's two modes we can operate in. If convert_src is | |
607 | * TRIG_TIMER, then convert_arg specifies the time between | |
608 | * each conversion, so we program the pacer clock to that | |
609 | * frequency and set the SCANLIST_START bit on every scanlist | |
610 | * entry. Otherwise, convert_src is TRIG_NOW, which means | |
611 | * we want the fastest possible conversions, scan_begin_src | |
612 | * is TRIG_TIMER, and scan_begin_arg specifies the time between | |
613 | * each scan, so we program the pacer clock to this frequency | |
614 | * and only set the SCANLIST_START bit on the first entry. | |
615 | */ | |
616 | ||
617 | if (cmd->convert_src == TRIG_TIMER) { | |
e3752a1d | 618 | counter = daqp_ns_to_timer(&cmd->convert_arg, |
0a85b6f0 | 619 | cmd->flags & TRIG_ROUND_MASK); |
62ed6662 BB |
620 | outb(counter & 0xff, dev->iobase + DAQP_PACER_LOW); |
621 | outb((counter >> 8) & 0xff, dev->iobase + DAQP_PACER_MID); | |
622 | outb((counter >> 16) & 0xff, dev->iobase + DAQP_PACER_HIGH); | |
623 | scanlist_start_on_every_entry = 1; | |
624 | } else { | |
e3752a1d | 625 | counter = daqp_ns_to_timer(&cmd->scan_begin_arg, |
0a85b6f0 | 626 | cmd->flags & TRIG_ROUND_MASK); |
62ed6662 BB |
627 | outb(counter & 0xff, dev->iobase + DAQP_PACER_LOW); |
628 | outb((counter >> 8) & 0xff, dev->iobase + DAQP_PACER_MID); | |
629 | outb((counter >> 16) & 0xff, dev->iobase + DAQP_PACER_HIGH); | |
630 | scanlist_start_on_every_entry = 0; | |
631 | } | |
632 | ||
633 | /* Program scan list */ | |
634 | ||
635 | for (i = 0; i < cmd->chanlist_len; i++) { | |
636 | ||
637 | int chanspec = cmd->chanlist[i]; | |
638 | ||
639 | /* Program one scan list entry */ | |
640 | ||
641 | v = DAQP_SCANLIST_CHANNEL(CR_CHAN(chanspec)) | |
0a85b6f0 | 642 | | DAQP_SCANLIST_GAIN(CR_RANGE(chanspec)); |
62ed6662 | 643 | |
3420f6b4 | 644 | if (CR_AREF(chanspec) == AREF_DIFF) |
62ed6662 | 645 | v |= DAQP_SCANLIST_DIFFERENTIAL; |
62ed6662 | 646 | |
3420f6b4 | 647 | if (i == 0 || scanlist_start_on_every_entry) |
62ed6662 | 648 | v |= DAQP_SCANLIST_START; |
62ed6662 BB |
649 | |
650 | outb(v & 0xff, dev->iobase + DAQP_SCANLIST); | |
651 | outb(v >> 8, dev->iobase + DAQP_SCANLIST); | |
652 | } | |
653 | ||
654 | /* Now it's time to program the FIFO threshold, basically the | |
655 | * number of samples the card will buffer before it interrupts | |
656 | * the CPU. | |
657 | * | |
658 | * If we don't have a stop count, then use half the size of | |
659 | * the FIFO (the manufacturer's recommendation). Consider | |
660 | * that the FIFO can hold 2K samples (4K bytes). With the | |
661 | * threshold set at half the FIFO size, we have a margin of | |
662 | * error of 1024 samples. At the chip's maximum sample rate | |
663 | * of 100,000 Hz, the CPU would have to delay interrupt | |
664 | * service for a full 10 milliseconds in order to lose data | |
665 | * here (as opposed to higher up in the kernel). I've never | |
666 | * seen it happen. However, for slow sample rates it may | |
667 | * buffer too much data and introduce too much delay for the | |
668 | * user application. | |
669 | * | |
670 | * If we have a stop count, then things get more interesting. | |
671 | * If the stop count is less than the FIFO size (actually | |
672 | * three-quarters of the FIFO size - see below), we just use | |
673 | * the stop count itself as the threshold, the card interrupts | |
674 | * us when that many samples have been taken, and we kill the | |
675 | * acquisition at that point and are done. If the stop count | |
676 | * is larger than that, then we divide it by 2 until it's less | |
677 | * than three quarters of the FIFO size (we always leave the | |
678 | * top quarter of the FIFO as protection against sluggish CPU | |
679 | * interrupt response) and use that as the threshold. So, if | |
680 | * the stop count is 4000 samples, we divide by two twice to | |
681 | * get 1000 samples, use that as the threshold, take four | |
682 | * interrupts to get our 4000 samples and are done. | |
683 | * | |
684 | * The algorithm could be more clever. For example, if 81000 | |
685 | * samples are requested, we could set the threshold to 1500 | |
686 | * samples and take 54 interrupts to get 81000. But 54 isn't | |
687 | * a power of two, so this algorithm won't find that option. | |
688 | * Instead, it'll set the threshold at 1266 and take 64 | |
689 | * interrupts to get 81024 samples, of which the last 24 will | |
690 | * be discarded... but we won't get the last interrupt until | |
691 | * they've been collected. To find the first option, the | |
692 | * computer could look at the prime decomposition of the | |
693 | * sample count (81000 = 3^4 * 5^3 * 2^3) and factor it into a | |
694 | * threshold (1500 = 3 * 5^3 * 2^2) and an interrupt count (54 | |
695 | * = 3^3 * 2). Hmmm... a one-line while loop or prime | |
696 | * decomposition of integers... I'll leave it the way it is. | |
697 | * | |
698 | * I'll also note a mini-race condition before ignoring it in | |
699 | * the code. Let's say we're taking 4000 samples, as before. | |
700 | * After 1000 samples, we get an interrupt. But before that | |
701 | * interrupt is completely serviced, another sample is taken | |
702 | * and loaded into the FIFO. Since the interrupt handler | |
703 | * empties the FIFO before returning, it will read 1001 samples. | |
704 | * If that happens four times, we'll end up taking 4004 samples, | |
705 | * not 4000. The interrupt handler will discard the extra four | |
706 | * samples (by halting the acquisition with four samples still | |
707 | * in the FIFO), but we will have to wait for them. | |
708 | * | |
709 | * In short, this code works pretty well, but for either of | |
710 | * the two reasons noted, might end up waiting for a few more | |
711 | * samples than actually requested. Shouldn't make too much | |
712 | * of a difference. | |
713 | */ | |
714 | ||
715 | /* Save away the number of conversions we should perform, and | |
716 | * compute the FIFO threshold (in bytes, not samples - that's | |
717 | * why we multiple local->count by 2 = sizeof(sample)) | |
718 | */ | |
719 | ||
720 | if (cmd->stop_src == TRIG_COUNT) { | |
721 | local->count = cmd->stop_arg * cmd->scan_end_arg; | |
722 | threshold = 2 * local->count; | |
723 | while (threshold > DAQP_FIFO_SIZE * 3 / 4) | |
724 | threshold /= 2; | |
725 | } else { | |
726 | local->count = -1; | |
727 | threshold = DAQP_FIFO_SIZE / 2; | |
728 | } | |
729 | ||
730 | /* Reset data FIFO (see page 28 of DAQP User's Manual) */ | |
731 | ||
732 | outb(DAQP_COMMAND_RSTF, dev->iobase + DAQP_COMMAND); | |
733 | ||
734 | /* Set FIFO threshold. First two bytes are near-empty | |
735 | * threshold, which is unused; next two bytes are near-full | |
736 | * threshold. We computed the number of bytes we want in the | |
737 | * FIFO when the interrupt is generated, what the card wants | |
738 | * is actually the number of available bytes left in the FIFO | |
739 | * when the interrupt is to happen. | |
740 | */ | |
741 | ||
742 | outb(0x00, dev->iobase + DAQP_FIFO); | |
743 | outb(0x00, dev->iobase + DAQP_FIFO); | |
744 | ||
745 | outb((DAQP_FIFO_SIZE - threshold) & 0xff, dev->iobase + DAQP_FIFO); | |
746 | outb((DAQP_FIFO_SIZE - threshold) >> 8, dev->iobase + DAQP_FIFO); | |
747 | ||
748 | /* Set trigger */ | |
749 | ||
750 | v = DAQP_CONTROL_TRIGGER_CONTINUOUS | DAQP_CONTROL_TRIGGER_INTERNAL | |
0a85b6f0 | 751 | | DAQP_CONTROL_PACER_5MHz | DAQP_CONTROL_FIFO_INT_ENABLE; |
62ed6662 BB |
752 | |
753 | outb(v, dev->iobase + DAQP_CONTROL); | |
754 | ||
755 | /* Reset any pending interrupts (my card has a tendancy to require | |
756 | * require multiple reads on the status register to achieve this) | |
757 | */ | |
e3752a1d | 758 | counter = 100; |
62ed6662 | 759 | while (--counter |
0a85b6f0 | 760 | && (inb(dev->iobase + DAQP_STATUS) & DAQP_STATUS_EVENTS)) ; |
62ed6662 | 761 | if (!counter) { |
3420f6b4 GS |
762 | printk(KERN_ERR |
763 | "daqp: couldn't clear interrupts in status register\n"); | |
62ed6662 BB |
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 | ||
3420f6b4 | 788 | if (local->stop) |
62ed6662 | 789 | return -EIO; |
62ed6662 BB |
790 | |
791 | chan = CR_CHAN(insn->chanspec); | |
792 | d = data[0]; | |
793 | d &= 0x0fff; | |
794 | d ^= 0x0800; /* Flip the sign */ | |
795 | d |= chan << 12; | |
796 | ||
797 | /* Make sure D/A update mode is direct update */ | |
798 | outb(0, dev->iobase + DAQP_AUX); | |
799 | ||
800 | outw(d, dev->iobase + DAQP_DA); | |
801 | ||
802 | return 1; | |
803 | } | |
804 | ||
805 | /* Digital input routine */ | |
806 | ||
0a85b6f0 MT |
807 | static int daqp_di_insn_read(struct comedi_device *dev, |
808 | struct comedi_subdevice *s, | |
809 | struct comedi_insn *insn, unsigned int *data) | |
62ed6662 | 810 | { |
0a85b6f0 | 811 | struct local_info_t *local = (struct local_info_t *)s->private; |
62ed6662 | 812 | |
3420f6b4 | 813 | if (local->stop) |
62ed6662 | 814 | return -EIO; |
62ed6662 BB |
815 | |
816 | data[0] = inb(dev->iobase + DAQP_DIGITAL_IO); | |
817 | ||
818 | return 1; | |
819 | } | |
820 | ||
821 | /* Digital output routine */ | |
822 | ||
0a85b6f0 MT |
823 | static int daqp_do_insn_write(struct comedi_device *dev, |
824 | struct comedi_subdevice *s, | |
825 | struct comedi_insn *insn, unsigned int *data) | |
62ed6662 | 826 | { |
0a85b6f0 | 827 | struct local_info_t *local = (struct local_info_t *)s->private; |
62ed6662 | 828 | |
3420f6b4 | 829 | if (local->stop) |
62ed6662 | 830 | return -EIO; |
62ed6662 BB |
831 | |
832 | outw(data[0] & 0xf, dev->iobase + DAQP_DIGITAL_IO); | |
833 | ||
834 | return 1; | |
835 | } | |
836 | ||
837 | /* daqp_attach is called via comedi_config to attach a comedi device | |
838 | * to a /dev/comedi*. Note that this is different from daqp_cs_attach() | |
839 | * which is called by the pcmcia subsystem to attach the PCMCIA card | |
840 | * when it is inserted. | |
841 | */ | |
842 | ||
da91b269 | 843 | static int daqp_attach(struct comedi_device *dev, struct comedi_devconfig *it) |
62ed6662 BB |
844 | { |
845 | int ret; | |
ab64f663 | 846 | struct local_info_t *local = dev_table[it->options[0]]; |
34c43922 | 847 | struct comedi_subdevice *s; |
62ed6662 BB |
848 | |
849 | if (it->options[0] < 0 || it->options[0] >= MAX_DEV || !local) { | |
850 | printk("comedi%d: No such daqp device %d\n", | |
0a85b6f0 | 851 | dev->minor, it->options[0]); |
62ed6662 BB |
852 | return -EIO; |
853 | } | |
854 | ||
855 | /* Typically brittle code that I don't completely understand, | |
856 | * but "it works on my card". The intent is to pull the model | |
857 | * number of the card out the PCMCIA CIS and stash it away as | |
858 | * the COMEDI board_name. Looks like the third field in | |
859 | * CISTPL_VERS_1 (offset 2) holds what we're looking for. If | |
860 | * it doesn't work, who cares, just leave it as "DAQP". | |
861 | */ | |
862 | ||
863 | strcpy(local->board_name, "DAQP"); | |
864 | dev->board_name = local->board_name; | |
55a19b39 DB |
865 | if (local->link->prod_id[2]) { |
866 | if (strncmp(local->link->prod_id[2], "DAQP", 4) == 0) { | |
867 | strncpy(local->board_name, local->link->prod_id[2], | |
868 | sizeof(local->board_name)); | |
62ed6662 BB |
869 | } |
870 | } | |
871 | ||
9a017a91 | 872 | dev->iobase = local->link->resource[0]->start; |
62ed6662 | 873 | |
c3744138 BP |
874 | ret = alloc_subdevices(dev, 4); |
875 | if (ret < 0) | |
62ed6662 BB |
876 | return ret; |
877 | ||
3420f6b4 | 878 | printk(KERN_INFO "comedi%d: attaching daqp%d (io 0x%04lx)\n", |
0a85b6f0 | 879 | dev->minor, it->options[0], dev->iobase); |
62ed6662 BB |
880 | |
881 | s = dev->subdevices + 0; | |
882 | dev->read_subdev = s; | |
883 | s->private = local; | |
884 | s->type = COMEDI_SUBD_AI; | |
885 | s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF | SDF_CMD_READ; | |
886 | s->n_chan = 8; | |
887 | s->len_chanlist = 2048; | |
888 | s->maxdata = 0xffff; | |
889 | s->range_table = &range_daqp_ai; | |
890 | s->insn_read = daqp_ai_insn_read; | |
891 | s->do_cmdtest = daqp_ai_cmdtest; | |
892 | s->do_cmd = daqp_ai_cmd; | |
893 | s->cancel = daqp_ai_cancel; | |
894 | ||
895 | s = dev->subdevices + 1; | |
896 | dev->write_subdev = s; | |
897 | s->private = local; | |
898 | s->type = COMEDI_SUBD_AO; | |
899 | s->subdev_flags = SDF_WRITEABLE; | |
900 | s->n_chan = 2; | |
901 | s->len_chanlist = 1; | |
902 | s->maxdata = 0x0fff; | |
903 | s->range_table = &range_daqp_ao; | |
904 | s->insn_write = daqp_ao_insn_write; | |
905 | ||
906 | s = dev->subdevices + 2; | |
907 | s->private = local; | |
908 | s->type = COMEDI_SUBD_DI; | |
909 | s->subdev_flags = SDF_READABLE; | |
910 | s->n_chan = 1; | |
911 | s->len_chanlist = 1; | |
912 | s->insn_read = daqp_di_insn_read; | |
913 | ||
914 | s = dev->subdevices + 3; | |
915 | s->private = local; | |
916 | s->type = COMEDI_SUBD_DO; | |
917 | s->subdev_flags = SDF_WRITEABLE; | |
918 | s->n_chan = 1; | |
919 | s->len_chanlist = 1; | |
920 | s->insn_write = daqp_do_insn_write; | |
921 | ||
922 | return 1; | |
923 | } | |
924 | ||
925 | /* daqp_detach (called from comedi_comdig) does nothing. If the PCMCIA | |
926 | * card is removed, daqp_cs_detach() is called by the pcmcia subsystem. | |
927 | */ | |
928 | ||
da91b269 | 929 | static int daqp_detach(struct comedi_device *dev) |
62ed6662 | 930 | { |
3420f6b4 | 931 | printk(KERN_INFO "comedi%d: detaching daqp\n", dev->minor); |
62ed6662 BB |
932 | |
933 | return 0; | |
934 | } | |
935 | ||
936 | /*==================================================================== | |
937 | ||
938 | PCMCIA interface code | |
939 | ||
940 | The rest of the code in this file is based on dummy_cs.c v1.24 | |
941 | from the Linux pcmcia_cs distribution v3.1.8 and is subject | |
942 | to the following license agreement. | |
943 | ||
944 | The remaining contents of this file are subject to the Mozilla Public | |
945 | License Version 1.1 (the "License"); you may not use this file | |
946 | except in compliance with the License. You may obtain a copy of | |
947 | the License at http://www.mozilla.org/MPL/ | |
948 | ||
949 | Software distributed under the License is distributed on an "AS | |
950 | IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or | |
951 | implied. See the License for the specific language governing | |
952 | rights and limitations under the License. | |
953 | ||
954 | The initial developer of the original code is David A. Hinds | |
955 | <dhinds@pcmcia.sourceforge.org>. Portions created by David A. Hinds | |
956 | are Copyright (C) 1999 David A. Hinds. All Rights Reserved. | |
957 | ||
958 | Alternatively, the contents of this file may be used under the | |
959 | terms of the GNU Public License version 2 (the "GPL"), in which | |
960 | case the provisions of the GPL are applicable instead of the | |
961 | above. If you wish to allow the use of your version of this file | |
962 | only under the terms of the GPL and not to allow others to use | |
963 | your version of this file under the MPL, indicate your decision | |
964 | by deleting the provisions above and replace them with the notice | |
965 | and other provisions required by the GPL. If you do not delete | |
966 | the provisions above, a recipient may use your version of this | |
967 | file under either the MPL or the GPL. | |
968 | ||
969 | ======================================================================*/ | |
970 | ||
971 | /* | |
972 | The event() function is this driver's Card Services event handler. | |
973 | It will be called by Card Services when an appropriate card status | |
974 | event is received. The config() and release() entry points are | |
975 | used to configure or release a socket, in response to card | |
976 | insertion and ejection events. | |
977 | ||
978 | Kernel version 2.6.16 upwards uses suspend() and resume() functions | |
979 | instead of an event() function. | |
980 | */ | |
981 | ||
982 | static void daqp_cs_config(struct pcmcia_device *link); | |
983 | static void daqp_cs_release(struct pcmcia_device *link); | |
984 | static int daqp_cs_suspend(struct pcmcia_device *p_dev); | |
985 | static int daqp_cs_resume(struct pcmcia_device *p_dev); | |
986 | ||
987 | /* | |
988 | The attach() and detach() entry points are used to create and destroy | |
989 | "instances" of the driver, where each instance represents everything | |
990 | needed to manage one actual PCMCIA card. | |
991 | */ | |
992 | ||
993 | static int daqp_cs_attach(struct pcmcia_device *); | |
994 | static void daqp_cs_detach(struct pcmcia_device *); | |
995 | ||
62ed6662 BB |
996 | /*====================================================================== |
997 | ||
998 | daqp_cs_attach() creates an "instance" of the driver, allocating | |
999 | local data structures for one device. The device is registered | |
1000 | with Card Services. | |
1001 | ||
1002 | The dev_link structure is initialized, but we don't actually | |
1003 | configure the card at this point -- we wait until we receive a | |
1004 | card insertion event. | |
1005 | ||
1006 | ======================================================================*/ | |
1007 | ||
1008 | static int daqp_cs_attach(struct pcmcia_device *link) | |
1009 | { | |
ab64f663 | 1010 | struct local_info_t *local; |
62ed6662 BB |
1011 | int i; |
1012 | ||
55a19b39 | 1013 | dev_dbg(&link->dev, "daqp_cs_attach()\n"); |
62ed6662 BB |
1014 | |
1015 | for (i = 0; i < MAX_DEV; i++) | |
1016 | if (dev_table[i] == NULL) | |
1017 | break; | |
1018 | if (i == MAX_DEV) { | |
1019 | printk(KERN_NOTICE "daqp_cs: no devices available\n"); | |
1020 | return -ENODEV; | |
1021 | } | |
1022 | ||
1023 | /* Allocate space for private device-specific data */ | |
ab64f663 | 1024 | local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL); |
62ed6662 BB |
1025 | if (!local) |
1026 | return -ENOMEM; | |
1027 | ||
1028 | local->table_index = i; | |
1029 | dev_table[i] = local; | |
1030 | local->link = link; | |
1031 | link->priv = local; | |
1032 | ||
62ed6662 BB |
1033 | daqp_cs_config(link); |
1034 | ||
1035 | return 0; | |
1036 | } /* daqp_cs_attach */ | |
1037 | ||
1038 | /*====================================================================== | |
1039 | ||
1040 | This deletes a driver "instance". The device is de-registered | |
1041 | with Card Services. If it has been released, all local data | |
1042 | structures are freed. Otherwise, the structures will be freed | |
1043 | when the device is released. | |
1044 | ||
1045 | ======================================================================*/ | |
1046 | ||
1047 | static void daqp_cs_detach(struct pcmcia_device *link) | |
1048 | { | |
ab64f663 | 1049 | struct local_info_t *dev = link->priv; |
62ed6662 | 1050 | |
55a19b39 | 1051 | dev_dbg(&link->dev, "daqp_cs_detach\n"); |
62ed6662 | 1052 | |
7622802e JMC |
1053 | dev->stop = 1; |
1054 | daqp_cs_release(link); | |
62ed6662 BB |
1055 | |
1056 | /* Unlink device structure, and free it */ | |
1057 | dev_table[dev->table_index] = NULL; | |
f25bd6bf | 1058 | kfree(dev); |
62ed6662 BB |
1059 | |
1060 | } /* daqp_cs_detach */ | |
1061 | ||
1062 | /*====================================================================== | |
1063 | ||
1064 | daqp_cs_config() is scheduled to run after a CARD_INSERTION event | |
1065 | is received, to configure the PCMCIA socket, and to make the | |
1066 | device available to the system. | |
1067 | ||
1068 | ======================================================================*/ | |
1069 | ||
c3744138 | 1070 | |
00990e7c | 1071 | static int daqp_pcmcia_config_loop(struct pcmcia_device *p_dev, void *priv_data) |
55a19b39 | 1072 | { |
00990e7c DB |
1073 | if (p_dev->config_index == 0) |
1074 | return -EINVAL; | |
62ed6662 | 1075 | |
90abdc3b | 1076 | return pcmcia_request_io(p_dev); |
55a19b39 | 1077 | } |
62ed6662 | 1078 | |
55a19b39 DB |
1079 | static void daqp_cs_config(struct pcmcia_device *link) |
1080 | { | |
55a19b39 | 1081 | int ret; |
62ed6662 | 1082 | |
55a19b39 | 1083 | dev_dbg(&link->dev, "daqp_cs_config\n"); |
62ed6662 | 1084 | |
00990e7c DB |
1085 | link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO; |
1086 | ||
55a19b39 DB |
1087 | ret = pcmcia_loop_config(link, daqp_pcmcia_config_loop, NULL); |
1088 | if (ret) { | |
1089 | dev_warn(&link->dev, "no configuration found\n"); | |
1090 | goto failed; | |
62ed6662 BB |
1091 | } |
1092 | ||
eb14120f DB |
1093 | ret = pcmcia_request_irq(link, daqp_interrupt); |
1094 | if (ret) | |
1095 | goto failed; | |
62ed6662 BB |
1096 | |
1097 | /* | |
1098 | This actually configures the PCMCIA socket -- setting up | |
1099 | the I/O windows and the interrupt mapping, and putting the | |
1100 | card and host interface into "Memory and IO" mode. | |
1101 | */ | |
1ac71e5a | 1102 | ret = pcmcia_enable_device(link); |
55a19b39 DB |
1103 | if (ret) |
1104 | goto failed; | |
62ed6662 | 1105 | |
62ed6662 | 1106 | /* Finally, report what we've done */ |
7feabb64 | 1107 | dev_info(&link->dev, "index 0x%02x", link->config_index); |
1ac71e5a | 1108 | printk(", irq %u", link->irq); |
9a017a91 DB |
1109 | if (link->resource[0]) |
1110 | printk(" & %pR", link->resource[0]); | |
1111 | if (link->resource[1]) | |
1112 | printk(" & %pR", link->resource[1]); | |
62ed6662 BB |
1113 | printk("\n"); |
1114 | ||
1115 | return; | |
1116 | ||
55a19b39 | 1117 | failed: |
62ed6662 BB |
1118 | daqp_cs_release(link); |
1119 | ||
1120 | } /* daqp_cs_config */ | |
1121 | ||
1122 | static void daqp_cs_release(struct pcmcia_device *link) | |
1123 | { | |
55a19b39 | 1124 | dev_dbg(&link->dev, "daqp_cs_release\n"); |
62ed6662 BB |
1125 | |
1126 | pcmcia_disable_device(link); | |
1127 | } /* daqp_cs_release */ | |
1128 | ||
1129 | /*====================================================================== | |
1130 | ||
1131 | The card status event handler. Mostly, this schedules other | |
1132 | stuff to run after an event is received. | |
1133 | ||
1134 | When a CARD_REMOVAL event is received, we immediately set a | |
1135 | private flag to block future accesses to this device. All the | |
1136 | functions that actually access the device should check this flag | |
1137 | to make sure the card is still present. | |
1138 | ||
1139 | ======================================================================*/ | |
1140 | ||
1141 | static int daqp_cs_suspend(struct pcmcia_device *link) | |
1142 | { | |
ab64f663 | 1143 | struct local_info_t *local = link->priv; |
62ed6662 BB |
1144 | |
1145 | /* Mark the device as stopped, to block IO until later */ | |
1146 | local->stop = 1; | |
1147 | return 0; | |
1148 | } | |
1149 | ||
1150 | static int daqp_cs_resume(struct pcmcia_device *link) | |
1151 | { | |
ab64f663 | 1152 | struct local_info_t *local = link->priv; |
62ed6662 BB |
1153 | |
1154 | local->stop = 0; | |
1155 | ||
1156 | return 0; | |
1157 | } | |
1158 | ||
1159 | /*====================================================================*/ | |
1160 | ||
1161 | #ifdef MODULE | |
1162 | ||
1163 | static struct pcmcia_device_id daqp_cs_id_table[] = { | |
1164 | PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0027), | |
1165 | PCMCIA_DEVICE_NULL | |
1166 | }; | |
1167 | ||
1168 | MODULE_DEVICE_TABLE(pcmcia, daqp_cs_id_table); | |
6c7f8196 AK |
1169 | MODULE_AUTHOR("Brent Baccala <baccala@freesoft.org>"); |
1170 | MODULE_DESCRIPTION("Comedi driver for Quatech DAQP PCMCIA data capture cards"); | |
1171 | MODULE_LICENSE("GPL"); | |
62ed6662 | 1172 | |
e3752a1d | 1173 | static struct pcmcia_driver daqp_cs_driver = { |
62ed6662 BB |
1174 | .probe = daqp_cs_attach, |
1175 | .remove = daqp_cs_detach, | |
1176 | .suspend = daqp_cs_suspend, | |
1177 | .resume = daqp_cs_resume, | |
1178 | .id_table = daqp_cs_id_table, | |
1179 | .owner = THIS_MODULE, | |
1180 | .drv = { | |
1685e633 | 1181 | .name = "quatech_daqp_cs", |
62ed6662 BB |
1182 | }, |
1183 | }; | |
1184 | ||
1185 | int __init init_module(void) | |
1186 | { | |
62ed6662 BB |
1187 | pcmcia_register_driver(&daqp_cs_driver); |
1188 | comedi_driver_register(&driver_daqp); | |
1189 | return 0; | |
1190 | } | |
1191 | ||
1192 | void __exit cleanup_module(void) | |
1193 | { | |
62ed6662 BB |
1194 | comedi_driver_unregister(&driver_daqp); |
1195 | pcmcia_unregister_driver(&daqp_cs_driver); | |
1196 | } | |
1197 | ||
1198 | #endif |