cb_pcimdas.c revision 631dd1a885b6d7e9f6f51b4e5b311c2bb04c323c
1/* 2 comedi/drivers/cb_pcimdas.c 3 Comedi driver for Computer Boards PCIM-DAS1602/16 4 5 COMEDI - Linux Control and Measurement Device Interface 6 Copyright (C) 2000 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 You should have received a copy of the GNU General Public License 19 along with this program; if not, write to the Free Software 20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21 22*/ 23/* 24Driver: cb_pcimdas 25Description: Measurement Computing PCI Migration series boards 26Devices: [ComputerBoards] PCIM-DAS1602/16 (cb_pcimdas) 27Author: Richard Bytheway 28Updated: Wed, 13 Nov 2002 12:34:56 +0000 29Status: experimental 30 31Written to support the PCIM-DAS1602/16 on a 2.4 series kernel. 32 33Configuration Options: 34 [0] - PCI bus number 35 [1] - PCI slot number 36 37Developed from cb_pcidas and skel by Richard Bytheway (mocelet@sucs.org). 38Only supports DIO, AO and simple AI in it's present form. 39No interrupts, multi channel or FIFO AI, although the card looks like it could support this. 40See http://www.mccdaq.com/PDFs/Manuals/pcim-das1602-16.pdf for more details. 41*/ 42 43#include "../comedidev.h" 44 45#include <linux/delay.h> 46#include <linux/interrupt.h> 47 48#include "comedi_pci.h" 49#include "plx9052.h" 50#include "8255.h" 51 52/* #define CBPCIMDAS_DEBUG */ 53#undef CBPCIMDAS_DEBUG 54 55#define PCI_VENDOR_ID_COMPUTERBOARDS 0x1307 56 57/* Registers for the PCIM-DAS1602/16 */ 58 59/* sizes of io regions (bytes) */ 60#define BADR0_SIZE 2 /* ?? */ 61#define BADR1_SIZE 4 62#define BADR2_SIZE 6 63#define BADR3_SIZE 16 64#define BADR4_SIZE 4 65 66/* DAC Offsets */ 67#define ADC_TRIG 0 68#define DAC0_OFFSET 2 69#define DAC1_OFFSET 4 70 71/* AI and Counter Constants */ 72#define MUX_LIMITS 0 73#define MAIN_CONN_DIO 1 74#define ADC_STAT 2 75#define ADC_CONV_STAT 3 76#define ADC_INT 4 77#define ADC_PACER 5 78#define BURST_MODE 6 79#define PROG_GAIN 7 80#define CLK8254_1_DATA 8 81#define CLK8254_2_DATA 9 82#define CLK8254_3_DATA 10 83#define CLK8254_CONTROL 11 84#define USER_COUNTER 12 85#define RESID_COUNT_H 13 86#define RESID_COUNT_L 14 87 88/* Board description */ 89struct cb_pcimdas_board { 90 const char *name; 91 unsigned short device_id; 92 int ai_se_chans; /* Inputs in single-ended mode */ 93 int ai_diff_chans; /* Inputs in differential mode */ 94 int ai_bits; /* analog input resolution */ 95 int ai_speed; /* fastest conversion period in ns */ 96 int ao_nchan; /* number of analog out channels */ 97 int ao_bits; /* analogue output resolution */ 98 int has_ao_fifo; /* analog output has fifo */ 99 int ao_scan_speed; /* analog output speed for 1602 series (for a scan, not conversion) */ 100 int fifo_size; /* number of samples fifo can hold */ 101 int dio_bits; /* number of dio bits */ 102 int has_dio; /* has DIO */ 103 const struct comedi_lrange *ranges; 104}; 105 106static const struct cb_pcimdas_board cb_pcimdas_boards[] = { 107 { 108 .name = "PCIM-DAS1602/16", 109 .device_id = 0x56, 110 .ai_se_chans = 16, 111 .ai_diff_chans = 8, 112 .ai_bits = 16, 113 .ai_speed = 10000, /* ?? */ 114 .ao_nchan = 2, 115 .ao_bits = 12, 116 .has_ao_fifo = 0, /* ?? */ 117 .ao_scan_speed = 10000, 118 /* ?? */ 119 .fifo_size = 1024, 120 .dio_bits = 24, 121 .has_dio = 1, 122/* .ranges = &cb_pcimdas_ranges, */ 123 }, 124}; 125 126/* This is used by modprobe to translate PCI IDs to drivers. Should 127 * only be used for PCI and ISA-PnP devices */ 128static DEFINE_PCI_DEVICE_TABLE(cb_pcimdas_pci_table) = { 129 { 130 PCI_VENDOR_ID_COMPUTERBOARDS, 0x0056, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, 131 { 132 0} 133}; 134 135MODULE_DEVICE_TABLE(pci, cb_pcimdas_pci_table); 136 137#define N_BOARDS 1 /* Max number of boards supported */ 138 139/* 140 * Useful for shorthand access to the particular board structure 141 */ 142#define thisboard ((const struct cb_pcimdas_board *)dev->board_ptr) 143 144/* this structure is for data unique to this hardware driver. If 145 several hardware drivers keep similar information in this structure, 146 feel free to suggest moving the variable to the struct comedi_device struct. */ 147struct cb_pcimdas_private { 148 int data; 149 150 /* would be useful for a PCI device */ 151 struct pci_dev *pci_dev; 152 153 /* base addresses */ 154 unsigned long BADR0; 155 unsigned long BADR1; 156 unsigned long BADR2; 157 unsigned long BADR3; 158 unsigned long BADR4; 159 160 /* Used for AO readback */ 161 unsigned int ao_readback[2]; 162 163 /* Used for DIO */ 164 unsigned short int port_a; /* copy of BADR4+0 */ 165 unsigned short int port_b; /* copy of BADR4+1 */ 166 unsigned short int port_c; /* copy of BADR4+2 */ 167 unsigned short int dio_mode; /* copy of BADR4+3 */ 168 169}; 170 171/* 172 * most drivers define the following macro to make it easy to 173 * access the private structure. 174 */ 175#define devpriv ((struct cb_pcimdas_private *)dev->private) 176 177/* 178 * The struct comedi_driver structure tells the Comedi core module 179 * which functions to call to configure/deconfigure (attach/detach) 180 * the board, and also about the kernel module that contains 181 * the device code. 182 */ 183static int cb_pcimdas_attach(struct comedi_device *dev, 184 struct comedi_devconfig *it); 185static int cb_pcimdas_detach(struct comedi_device *dev); 186static struct comedi_driver driver_cb_pcimdas = { 187 .driver_name = "cb_pcimdas", 188 .module = THIS_MODULE, 189 .attach = cb_pcimdas_attach, 190 .detach = cb_pcimdas_detach, 191}; 192 193static int cb_pcimdas_ai_rinsn(struct comedi_device *dev, 194 struct comedi_subdevice *s, 195 struct comedi_insn *insn, unsigned int *data); 196static int cb_pcimdas_ao_winsn(struct comedi_device *dev, 197 struct comedi_subdevice *s, 198 struct comedi_insn *insn, unsigned int *data); 199static int cb_pcimdas_ao_rinsn(struct comedi_device *dev, 200 struct comedi_subdevice *s, 201 struct comedi_insn *insn, unsigned int *data); 202 203/* 204 * Attach is called by the Comedi core to configure the driver 205 * for a particular board. If you specified a board_name array 206 * in the driver structure, dev->board_ptr contains that 207 * address. 208 */ 209static int cb_pcimdas_attach(struct comedi_device *dev, 210 struct comedi_devconfig *it) 211{ 212 struct comedi_subdevice *s; 213 struct pci_dev *pcidev = NULL; 214 int index; 215 /* int i; */ 216 217 printk("comedi%d: cb_pcimdas: ", dev->minor); 218 219/* 220 * Allocate the private structure area. 221 */ 222 if (alloc_private(dev, sizeof(struct cb_pcimdas_private)) < 0) 223 return -ENOMEM; 224 225/* 226 * Probe the device to determine what device in the series it is. 227 */ 228 printk("\n"); 229 230 for_each_pci_dev(pcidev) { 231 /* is it not a computer boards card? */ 232 if (pcidev->vendor != PCI_VENDOR_ID_COMPUTERBOARDS) 233 continue; 234 /* loop through cards supported by this driver */ 235 for (index = 0; index < N_BOARDS; index++) { 236 if (cb_pcimdas_boards[index].device_id != 237 pcidev->device) 238 continue; 239 /* was a particular bus/slot requested? */ 240 if (it->options[0] || it->options[1]) { 241 /* are we on the wrong bus/slot? */ 242 if (pcidev->bus->number != it->options[0] || 243 PCI_SLOT(pcidev->devfn) != it->options[1]) { 244 continue; 245 } 246 } 247 devpriv->pci_dev = pcidev; 248 dev->board_ptr = cb_pcimdas_boards + index; 249 goto found; 250 } 251 } 252 253 printk("No supported ComputerBoards/MeasurementComputing card found on " 254 "requested position\n"); 255 return -EIO; 256 257found: 258 259 printk("Found %s on bus %i, slot %i\n", cb_pcimdas_boards[index].name, 260 pcidev->bus->number, PCI_SLOT(pcidev->devfn)); 261 262 /* Warn about non-tested features */ 263 switch (thisboard->device_id) { 264 case 0x56: 265 break; 266 default: 267 printk("THIS CARD IS UNSUPPORTED.\n" 268 "PLEASE REPORT USAGE TO <mocelet@sucs.org>\n"); 269 }; 270 271 if (comedi_pci_enable(pcidev, "cb_pcimdas")) { 272 printk(" Failed to enable PCI device and request regions\n"); 273 return -EIO; 274 } 275 276 devpriv->BADR0 = pci_resource_start(devpriv->pci_dev, 0); 277 devpriv->BADR1 = pci_resource_start(devpriv->pci_dev, 1); 278 devpriv->BADR2 = pci_resource_start(devpriv->pci_dev, 2); 279 devpriv->BADR3 = pci_resource_start(devpriv->pci_dev, 3); 280 devpriv->BADR4 = pci_resource_start(devpriv->pci_dev, 4); 281 282#ifdef CBPCIMDAS_DEBUG 283 printk("devpriv->BADR0 = 0x%lx\n", devpriv->BADR0); 284 printk("devpriv->BADR1 = 0x%lx\n", devpriv->BADR1); 285 printk("devpriv->BADR2 = 0x%lx\n", devpriv->BADR2); 286 printk("devpriv->BADR3 = 0x%lx\n", devpriv->BADR3); 287 printk("devpriv->BADR4 = 0x%lx\n", devpriv->BADR4); 288#endif 289 290/* Dont support IRQ yet */ 291/* get irq */ 292/* if(request_irq(devpriv->pci_dev->irq, cb_pcimdas_interrupt, IRQF_SHARED, "cb_pcimdas", dev )) */ 293/* { */ 294/* printk(" unable to allocate irq %u\n", devpriv->pci_dev->irq); */ 295/* return -EINVAL; */ 296/* } */ 297/* dev->irq = devpriv->pci_dev->irq; */ 298 299 /* Initialize dev->board_name */ 300 dev->board_name = thisboard->name; 301 302/* 303 * Allocate the subdevice structures. alloc_subdevice() is a 304 * convenient macro defined in comedidev.h. 305 */ 306 if (alloc_subdevices(dev, 3) < 0) 307 return -ENOMEM; 308 309 s = dev->subdevices + 0; 310 /* dev->read_subdev=s; */ 311 /* analog input subdevice */ 312 s->type = COMEDI_SUBD_AI; 313 s->subdev_flags = SDF_READABLE | SDF_GROUND; 314 s->n_chan = thisboard->ai_se_chans; 315 s->maxdata = (1 << thisboard->ai_bits) - 1; 316 s->range_table = &range_unknown; 317 s->len_chanlist = 1; /* This is the maximum chanlist length that */ 318 /* the board can handle */ 319 s->insn_read = cb_pcimdas_ai_rinsn; 320 321 s = dev->subdevices + 1; 322 /* analog output subdevice */ 323 s->type = COMEDI_SUBD_AO; 324 s->subdev_flags = SDF_WRITABLE; 325 s->n_chan = thisboard->ao_nchan; 326 s->maxdata = 1 << thisboard->ao_bits; 327 s->range_table = &range_unknown; /* ranges are hardware settable, but not software readable. */ 328 s->insn_write = &cb_pcimdas_ao_winsn; 329 s->insn_read = &cb_pcimdas_ao_rinsn; 330 331 s = dev->subdevices + 2; 332 /* digital i/o subdevice */ 333 if (thisboard->has_dio) 334 subdev_8255_init(dev, s, NULL, devpriv->BADR4); 335 else 336 s->type = COMEDI_SUBD_UNUSED; 337 338 printk("attached\n"); 339 340 return 1; 341} 342 343/* 344 * _detach is called to deconfigure a device. It should deallocate 345 * resources. 346 * This function is also called when _attach() fails, so it should be 347 * careful not to release resources that were not necessarily 348 * allocated by _attach(). dev->private and dev->subdevices are 349 * deallocated automatically by the core. 350 */ 351static int cb_pcimdas_detach(struct comedi_device *dev) 352{ 353#ifdef CBPCIMDAS_DEBUG 354 if (devpriv) { 355 printk("devpriv->BADR0 = 0x%lx\n", devpriv->BADR0); 356 printk("devpriv->BADR1 = 0x%lx\n", devpriv->BADR1); 357 printk("devpriv->BADR2 = 0x%lx\n", devpriv->BADR2); 358 printk("devpriv->BADR3 = 0x%lx\n", devpriv->BADR3); 359 printk("devpriv->BADR4 = 0x%lx\n", devpriv->BADR4); 360 } 361#endif 362 printk("comedi%d: cb_pcimdas: remove\n", dev->minor); 363 if (dev->irq) 364 free_irq(dev->irq, dev); 365 if (devpriv) { 366 if (devpriv->pci_dev) { 367 if (devpriv->BADR0) 368 comedi_pci_disable(devpriv->pci_dev); 369 pci_dev_put(devpriv->pci_dev); 370 } 371 } 372 373 return 0; 374} 375 376/* 377 * "instructions" read/write data in "one-shot" or "software-triggered" 378 * mode. 379 */ 380static int cb_pcimdas_ai_rinsn(struct comedi_device *dev, 381 struct comedi_subdevice *s, 382 struct comedi_insn *insn, unsigned int *data) 383{ 384 int n, i; 385 unsigned int d; 386 unsigned int busy; 387 int chan = CR_CHAN(insn->chanspec); 388 unsigned short chanlims; 389 int maxchans; 390 391 /* only support sw initiated reads from a single channel */ 392 393 /* check channel number */ 394 if ((inb(devpriv->BADR3 + 2) & 0x20) == 0) /* differential mode */ 395 maxchans = thisboard->ai_diff_chans; 396 else 397 maxchans = thisboard->ai_se_chans; 398 399 if (chan > (maxchans - 1)) 400 return -ETIMEDOUT; /* *** Wrong error code. Fixme. */ 401 402 /* configure for sw initiated read */ 403 d = inb(devpriv->BADR3 + 5); 404 if ((d & 0x03) > 0) { /* only reset if needed. */ 405 d = d & 0xfd; 406 outb(d, devpriv->BADR3 + 5); 407 } 408 outb(0x01, devpriv->BADR3 + 6); /* set bursting off, conversions on */ 409 outb(0x00, devpriv->BADR3 + 7); /* set range to 10V. UP/BP is controlled by a switch on the board */ 410 411 /* write channel limits to multiplexer, set Low (bits 0-3) and High (bits 4-7) channels to chan. */ 412 chanlims = chan | (chan << 4); 413 outb(chanlims, devpriv->BADR3 + 0); 414 415 /* convert n samples */ 416 for (n = 0; n < insn->n; n++) { 417 /* trigger conversion */ 418 outw(0, devpriv->BADR2 + 0); 419 420#define TIMEOUT 1000 /* typically takes 5 loops on a lightly loaded Pentium 100MHz, */ 421 /* this is likely to be 100 loops on a 2GHz machine, so set 1000 as the limit. */ 422 423 /* wait for conversion to end */ 424 for (i = 0; i < TIMEOUT; i++) { 425 busy = inb(devpriv->BADR3 + 2) & 0x80; 426 if (!busy) 427 break; 428 } 429 if (i == TIMEOUT) { 430 printk("timeout\n"); 431 return -ETIMEDOUT; 432 } 433 /* read data */ 434 d = inw(devpriv->BADR2 + 0); 435 436 /* mangle the data as necessary */ 437 /* d ^= 1<<(thisboard->ai_bits-1); // 16 bit data from ADC, so no mangle needed. */ 438 439 data[n] = d; 440 } 441 442 /* return the number of samples read/written */ 443 return n; 444} 445 446static int cb_pcimdas_ao_winsn(struct comedi_device *dev, 447 struct comedi_subdevice *s, 448 struct comedi_insn *insn, unsigned int *data) 449{ 450 int i; 451 int chan = CR_CHAN(insn->chanspec); 452 453 /* Writing a list of values to an AO channel is probably not 454 * very useful, but that's how the interface is defined. */ 455 for (i = 0; i < insn->n; i++) { 456 switch (chan) { 457 case 0: 458 outw(data[i] & 0x0FFF, devpriv->BADR2 + DAC0_OFFSET); 459 break; 460 case 1: 461 outw(data[i] & 0x0FFF, devpriv->BADR2 + DAC1_OFFSET); 462 break; 463 default: 464 return -1; 465 } 466 devpriv->ao_readback[chan] = data[i]; 467 } 468 469 /* return the number of samples read/written */ 470 return i; 471} 472 473/* AO subdevices should have a read insn as well as a write insn. 474 * Usually this means copying a value stored in devpriv. */ 475static int cb_pcimdas_ao_rinsn(struct comedi_device *dev, 476 struct comedi_subdevice *s, 477 struct comedi_insn *insn, unsigned int *data) 478{ 479 int i; 480 int chan = CR_CHAN(insn->chanspec); 481 482 for (i = 0; i < insn->n; i++) 483 data[i] = devpriv->ao_readback[chan]; 484 485 return i; 486} 487 488/* 489 * A convenient macro that defines init_module() and cleanup_module(), 490 * as necessary. 491 */ 492static int __devinit driver_cb_pcimdas_pci_probe(struct pci_dev *dev, 493 const struct pci_device_id 494 *ent) 495{ 496 return comedi_pci_auto_config(dev, driver_cb_pcimdas.driver_name); 497} 498 499static void __devexit driver_cb_pcimdas_pci_remove(struct pci_dev *dev) 500{ 501 comedi_pci_auto_unconfig(dev); 502} 503 504static struct pci_driver driver_cb_pcimdas_pci_driver = { 505 .id_table = cb_pcimdas_pci_table, 506 .probe = &driver_cb_pcimdas_pci_probe, 507 .remove = __devexit_p(&driver_cb_pcimdas_pci_remove) 508}; 509 510static int __init driver_cb_pcimdas_init_module(void) 511{ 512 int retval; 513 514 retval = comedi_driver_register(&driver_cb_pcimdas); 515 if (retval < 0) 516 return retval; 517 518 driver_cb_pcimdas_pci_driver.name = 519 (char *)driver_cb_pcimdas.driver_name; 520 return pci_register_driver(&driver_cb_pcimdas_pci_driver); 521} 522 523static void __exit driver_cb_pcimdas_cleanup_module(void) 524{ 525 pci_unregister_driver(&driver_cb_pcimdas_pci_driver); 526 comedi_driver_unregister(&driver_cb_pcimdas); 527} 528 529module_init(driver_cb_pcimdas_init_module); 530module_exit(driver_cb_pcimdas_cleanup_module); 531 532MODULE_AUTHOR("Comedi http://www.comedi.org"); 533MODULE_DESCRIPTION("Comedi low-level driver"); 534MODULE_LICENSE("GPL"); 535