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Linux/drivers/staging/comedi/drivers/ni_atmio.c

  1 /*
  2     comedi/drivers/ni_atmio.c
  3     Hardware driver for NI AT-MIO E series cards
  4 
  5     COMEDI - Linux Control and Measurement Device Interface
  6     Copyright (C) 1997-2001 David A. Schleef <ds@schleef.org>
  7 
  8     This program is free software; you can redistribute it and/or modify
  9     it under the terms of the GNU General Public License as published by
 10     the Free Software Foundation; either version 2 of the License, or
 11     (at your option) any later version.
 12 
 13     This program is distributed in the hope that it will be useful,
 14     but WITHOUT ANY WARRANTY; without even the implied warranty of
 15     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 16     GNU General Public License for more details.
 17 */
 18 /*
 19 Driver: ni_atmio
 20 Description: National Instruments AT-MIO-E series
 21 Author: ds
 22 Devices: [National Instruments] AT-MIO-16E-1 (ni_atmio),
 23   AT-MIO-16E-2, AT-MIO-16E-10, AT-MIO-16DE-10, AT-MIO-64E-3,
 24   AT-MIO-16XE-50, AT-MIO-16XE-10, AT-AI-16XE-10
 25 Status: works
 26 Updated: Thu May  1 20:03:02 CDT 2003
 27 
 28 The driver has 2.6 kernel isapnp support, and
 29 will automatically probe for a supported board if the
 30 I/O base is left unspecified with comedi_config.
 31 However, many of
 32 the isapnp id numbers are unknown.  If your board is not
 33 recognized, please send the output of 'cat /proc/isapnp'
 34 (you may need to modprobe the isa-pnp module for
 35 /proc/isapnp to exist) so the
 36 id numbers for your board can be added to the driver.
 37 
 38 Otherwise, you can use the isapnptools package to configure
 39 your board.  Use isapnp to
 40 configure the I/O base and IRQ for the board, and then pass
 41 the same values as
 42 parameters in comedi_config.  A sample isapnp.conf file is included
 43 in the etc/ directory of Comedilib.
 44 
 45 Comedilib includes a utility to autocalibrate these boards.  The
 46 boards seem to boot into a state where the all calibration DACs
 47 are at one extreme of their range, thus the default calibration
 48 is terrible.  Calibration at boot is strongly encouraged.
 49 
 50 To use the extended digital I/O on some of the boards, enable the
 51 8255 driver when configuring the Comedi source tree.
 52 
 53 External triggering is supported for some events.  The channel index
 54 (scan_begin_arg, etc.) maps to PFI0 - PFI9.
 55 
 56 Some of the more esoteric triggering possibilities of these boards
 57 are not supported.
 58 */
 59 /*
 60         The real guts of the driver is in ni_mio_common.c, which is included
 61         both here and in ni_pcimio.c
 62 
 63         Interrupt support added by Truxton Fulton <trux@truxton.com>
 64 
 65         References for specifications:
 66 
 67            340747b.pdf  Register Level Programmer Manual (obsolete)
 68            340747c.pdf  Register Level Programmer Manual (new)
 69            DAQ-STC reference manual
 70 
 71         Other possibly relevant info:
 72 
 73            320517c.pdf  User manual (obsolete)
 74            320517f.pdf  User manual (new)
 75            320889a.pdf  delete
 76            320906c.pdf  maximum signal ratings
 77            321066a.pdf  about 16x
 78            321791a.pdf  discontinuation of at-mio-16e-10 rev. c
 79            321808a.pdf  about at-mio-16e-10 rev P
 80            321837a.pdf  discontinuation of at-mio-16de-10 rev d
 81            321838a.pdf  about at-mio-16de-10 rev N
 82 
 83         ISSUES:
 84 
 85         need to deal with external reference for DAC, and other DAC
 86         properties in board properties
 87 
 88         deal with at-mio-16de-10 revision D to N changes, etc.
 89 
 90 */
 91 
 92 #include <linux/module.h>
 93 #include <linux/interrupt.h>
 94 #include "../comedidev.h"
 95 
 96 #include <linux/isapnp.h>
 97 
 98 #include "ni_stc.h"
 99 #include "8255.h"
100 
101 #define ATMIO 1
102 #undef PCIMIO
103 
104 /*
105  *  AT specific setup
106  */
107 
108 #define NI_SIZE 0x20
109 
110 #define MAX_N_CALDACS 32
111 
112 static const struct ni_board_struct ni_boards[] = {
113         {.device_id = 44,
114          .isapnp_id = 0x0000,   /* XXX unknown */
115          .name = "at-mio-16e-1",
116          .n_adchan = 16,
117          .adbits = 12,
118          .ai_fifo_depth = 8192,
119          .alwaysdither = 0,
120          .gainlkup = ai_gain_16,
121          .ai_speed = 800,
122          .n_aochan = 2,
123          .aobits = 12,
124          .ao_fifo_depth = 2048,
125          .ao_range_table = &range_ni_E_ao_ext,
126          .ao_unipolar = 1,
127          .ao_speed = 1000,
128          .has_8255 = 0,
129          .num_p0_dio_channels = 8,
130          .caldac = {mb88341},
131          },
132         {.device_id = 25,
133          .isapnp_id = 0x1900,
134          .name = "at-mio-16e-2",
135          .n_adchan = 16,
136          .adbits = 12,
137          .ai_fifo_depth = 2048,
138          .alwaysdither = 0,
139          .gainlkup = ai_gain_16,
140          .ai_speed = 2000,
141          .n_aochan = 2,
142          .aobits = 12,
143          .ao_fifo_depth = 2048,
144          .ao_range_table = &range_ni_E_ao_ext,
145          .ao_unipolar = 1,
146          .ao_speed = 1000,
147          .has_8255 = 0,
148          .num_p0_dio_channels = 8,
149          .caldac = {mb88341},
150          },
151         {.device_id = 36,
152          .isapnp_id = 0x2400,
153          .name = "at-mio-16e-10",
154          .n_adchan = 16,
155          .adbits = 12,
156          .ai_fifo_depth = 512,
157          .alwaysdither = 0,
158          .gainlkup = ai_gain_16,
159          .ai_speed = 10000,
160          .n_aochan = 2,
161          .aobits = 12,
162          .ao_fifo_depth = 0,
163          .ao_range_table = &range_ni_E_ao_ext,
164          .ao_unipolar = 1,
165          .ao_speed = 10000,
166          .num_p0_dio_channels = 8,
167          .caldac = {ad8804_debug},
168          .has_8255 = 0,
169          },
170         {.device_id = 37,
171          .isapnp_id = 0x2500,
172          .name = "at-mio-16de-10",
173          .n_adchan = 16,
174          .adbits = 12,
175          .ai_fifo_depth = 512,
176          .alwaysdither = 0,
177          .gainlkup = ai_gain_16,
178          .ai_speed = 10000,
179          .n_aochan = 2,
180          .aobits = 12,
181          .ao_fifo_depth = 0,
182          .ao_range_table = &range_ni_E_ao_ext,
183          .ao_unipolar = 1,
184          .ao_speed = 10000,
185          .num_p0_dio_channels = 8,
186          .caldac = {ad8804_debug},
187          .has_8255 = 1,
188          },
189         {.device_id = 38,
190          .isapnp_id = 0x2600,
191          .name = "at-mio-64e-3",
192          .n_adchan = 64,
193          .adbits = 12,
194          .ai_fifo_depth = 2048,
195          .alwaysdither = 0,
196          .gainlkup = ai_gain_16,
197          .ai_speed = 2000,
198          .n_aochan = 2,
199          .aobits = 12,
200          .ao_fifo_depth = 2048,
201          .ao_range_table = &range_ni_E_ao_ext,
202          .ao_unipolar = 1,
203          .ao_speed = 1000,
204          .has_8255 = 0,
205          .num_p0_dio_channels = 8,
206          .caldac = {ad8804_debug},
207          },
208         {.device_id = 39,
209          .isapnp_id = 0x2700,
210          .name = "at-mio-16xe-50",
211          .n_adchan = 16,
212          .adbits = 16,
213          .ai_fifo_depth = 512,
214          .alwaysdither = 1,
215          .gainlkup = ai_gain_8,
216          .ai_speed = 50000,
217          .n_aochan = 2,
218          .aobits = 12,
219          .ao_fifo_depth = 0,
220          .ao_range_table = &range_bipolar10,
221          .ao_unipolar = 0,
222          .ao_speed = 50000,
223          .num_p0_dio_channels = 8,
224          .caldac = {dac8800, dac8043},
225          .has_8255 = 0,
226          },
227         {.device_id = 50,
228          .isapnp_id = 0x0000,   /* XXX unknown */
229          .name = "at-mio-16xe-10",
230          .n_adchan = 16,
231          .adbits = 16,
232          .ai_fifo_depth = 512,
233          .alwaysdither = 1,
234          .gainlkup = ai_gain_14,
235          .ai_speed = 10000,
236          .n_aochan = 2,
237          .aobits = 16,
238          .ao_fifo_depth = 2048,
239          .ao_range_table = &range_ni_E_ao_ext,
240          .ao_unipolar = 1,
241          .ao_speed = 1000,
242          .num_p0_dio_channels = 8,
243          .caldac = {dac8800, dac8043, ad8522},
244          .has_8255 = 0,
245          },
246         {.device_id = 51,
247          .isapnp_id = 0x0000,   /* XXX unknown */
248          .name = "at-ai-16xe-10",
249          .n_adchan = 16,
250          .adbits = 16,
251          .ai_fifo_depth = 512,
252          .alwaysdither = 1,     /* unknown */
253          .gainlkup = ai_gain_14,
254          .ai_speed = 10000,
255          .n_aochan = 0,
256          .aobits = 0,
257          .ao_fifo_depth = 0,
258          .ao_unipolar = 0,
259          .num_p0_dio_channels = 8,
260          .caldac = {dac8800, dac8043, ad8522},
261          .has_8255 = 0,
262          }
263 };
264 
265 static const int ni_irqpin[] = {
266         -1, -1, -1, 0, 1, 2, -1, 3, -1, -1, 4, 5, 6, -1, -1, 7
267 };
268 
269 #define interrupt_pin(a)        (ni_irqpin[(a)])
270 
271 #define IRQ_POLARITY 0
272 
273 #define NI_E_IRQ_FLAGS          0
274 
275 struct ni_private {
276         struct pnp_dev *isapnp_dev;
277         NI_PRIVATE_COMMON
278 
279 };
280 
281 /* How we access registers */
282 
283 #define ni_writel(a, b)         (outl((a), (b)+dev->iobase))
284 #define ni_readl(a)             (inl((a)+dev->iobase))
285 #define ni_writew(a, b)         (outw((a), (b)+dev->iobase))
286 #define ni_readw(a)             (inw((a)+dev->iobase))
287 #define ni_writeb(a, b)         (outb((a), (b)+dev->iobase))
288 #define ni_readb(a)             (inb((a)+dev->iobase))
289 
290 /* How we access windowed registers */
291 
292 /* We automatically take advantage of STC registers that can be
293  * read/written directly in the I/O space of the board.  The
294  * AT-MIO devices map the low 8 STC registers to iobase+addr*2. */
295 
296 static void ni_atmio_win_out(struct comedi_device *dev, uint16_t data, int addr)
297 {
298         struct ni_private *devpriv = dev->private;
299         unsigned long flags;
300 
301         spin_lock_irqsave(&devpriv->window_lock, flags);
302         if ((addr) < 8) {
303                 ni_writew(data, addr * 2);
304         } else {
305                 ni_writew(addr, Window_Address);
306                 ni_writew(data, Window_Data);
307         }
308         spin_unlock_irqrestore(&devpriv->window_lock, flags);
309 }
310 
311 static uint16_t ni_atmio_win_in(struct comedi_device *dev, int addr)
312 {
313         struct ni_private *devpriv = dev->private;
314         unsigned long flags;
315         uint16_t ret;
316 
317         spin_lock_irqsave(&devpriv->window_lock, flags);
318         if (addr < 8) {
319                 ret = ni_readw(addr * 2);
320         } else {
321                 ni_writew(addr, Window_Address);
322                 ret = ni_readw(Window_Data);
323         }
324         spin_unlock_irqrestore(&devpriv->window_lock, flags);
325 
326         return ret;
327 }
328 
329 static struct pnp_device_id device_ids[] = {
330         {.id = "NIC1900", .driver_data = 0},
331         {.id = "NIC2400", .driver_data = 0},
332         {.id = "NIC2500", .driver_data = 0},
333         {.id = "NIC2600", .driver_data = 0},
334         {.id = "NIC2700", .driver_data = 0},
335         {.id = ""}
336 };
337 
338 MODULE_DEVICE_TABLE(pnp, device_ids);
339 
340 #include "ni_mio_common.c"
341 
342 static int ni_isapnp_find_board(struct pnp_dev **dev)
343 {
344         struct pnp_dev *isapnp_dev = NULL;
345         int i;
346 
347         for (i = 0; i < ARRAY_SIZE(ni_boards); i++) {
348                 isapnp_dev = pnp_find_dev(NULL,
349                                           ISAPNP_VENDOR('N', 'I', 'C'),
350                                           ISAPNP_FUNCTION(ni_boards[i].
351                                                           isapnp_id), NULL);
352 
353                 if (isapnp_dev == NULL || isapnp_dev->card == NULL)
354                         continue;
355 
356                 if (pnp_device_attach(isapnp_dev) < 0) {
357                         printk
358                          ("ni_atmio: %s found but already active, skipping.\n",
359                           ni_boards[i].name);
360                         continue;
361                 }
362                 if (pnp_activate_dev(isapnp_dev) < 0) {
363                         pnp_device_detach(isapnp_dev);
364                         return -EAGAIN;
365                 }
366                 if (!pnp_port_valid(isapnp_dev, 0)
367                     || !pnp_irq_valid(isapnp_dev, 0)) {
368                         pnp_device_detach(isapnp_dev);
369                         printk("ni_atmio: pnp invalid port or irq, aborting\n");
370                         return -ENOMEM;
371                 }
372                 break;
373         }
374         if (i == ARRAY_SIZE(ni_boards))
375                 return -ENODEV;
376         *dev = isapnp_dev;
377         return 0;
378 }
379 
380 static int ni_getboardtype(struct comedi_device *dev)
381 {
382         int device_id = ni_read_eeprom(dev, 511);
383         int i;
384 
385         for (i = 0; i < ARRAY_SIZE(ni_boards); i++) {
386                 if (ni_boards[i].device_id == device_id)
387                         return i;
388 
389         }
390         if (device_id == 255)
391                 printk(" can't find board\n");
392          else if (device_id == 0)
393                 printk(" EEPROM read error (?) or device not found\n");
394          else
395                 printk(" unknown device ID %d -- contact author\n", device_id);
396 
397         return -1;
398 }
399 
400 static int ni_atmio_attach(struct comedi_device *dev,
401                            struct comedi_devconfig *it)
402 {
403         const struct ni_board_struct *boardtype;
404         struct ni_private *devpriv;
405         struct pnp_dev *isapnp_dev;
406         int ret;
407         unsigned long iobase;
408         int board;
409         unsigned int irq;
410 
411         ret = ni_alloc_private(dev);
412         if (ret)
413                 return ret;
414         devpriv = dev->private;
415 
416         devpriv->stc_writew = &ni_atmio_win_out;
417         devpriv->stc_readw = &ni_atmio_win_in;
418         devpriv->stc_writel = &win_out2;
419         devpriv->stc_readl = &win_in2;
420 
421         iobase = it->options[0];
422         irq = it->options[1];
423         isapnp_dev = NULL;
424         if (iobase == 0) {
425                 ret = ni_isapnp_find_board(&isapnp_dev);
426                 if (ret < 0)
427                         return ret;
428 
429                 iobase = pnp_port_start(isapnp_dev, 0);
430                 irq = pnp_irq(isapnp_dev, 0);
431                 devpriv->isapnp_dev = isapnp_dev;
432         }
433 
434         ret = comedi_request_region(dev, iobase, NI_SIZE);
435         if (ret)
436                 return ret;
437 
438         /* get board type */
439 
440         board = ni_getboardtype(dev);
441         if (board < 0)
442                 return -EIO;
443 
444         dev->board_ptr = ni_boards + board;
445         boardtype = comedi_board(dev);
446 
447         printk(" %s", boardtype->name);
448         dev->board_name = boardtype->name;
449 
450         /* irq stuff */
451 
452         if (irq != 0) {
453                 if (irq > 15 || ni_irqpin[irq] == -1) {
454                         printk(" invalid irq %u\n", irq);
455                         return -EINVAL;
456                 }
457                 printk(" ( irq = %u )", irq);
458                 ret = request_irq(irq, ni_E_interrupt, NI_E_IRQ_FLAGS,
459                                   "ni_atmio", dev);
460 
461                 if (ret < 0) {
462                         printk(" irq not available\n");
463                         return -EINVAL;
464                 }
465                 dev->irq = irq;
466         }
467 
468         /* generic E series stuff in ni_mio_common.c */
469 
470         ret = ni_E_init(dev);
471         if (ret < 0)
472                 return ret;
473 
474 
475         return 0;
476 }
477 
478 static void ni_atmio_detach(struct comedi_device *dev)
479 {
480         struct ni_private *devpriv = dev->private;
481 
482         mio_common_detach(dev);
483         comedi_legacy_detach(dev);
484         if (devpriv->isapnp_dev)
485                 pnp_device_detach(devpriv->isapnp_dev);
486 }
487 
488 static struct comedi_driver ni_atmio_driver = {
489         .driver_name    = "ni_atmio",
490         .module         = THIS_MODULE,
491         .attach         = ni_atmio_attach,
492         .detach         = ni_atmio_detach,
493 };
494 module_comedi_driver(ni_atmio_driver);
495 

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