ni_at_ao.c revision 90f703d30dd3e0c16ff80f35e34e511385a05ad5
1/* 2 comedi/drivers/ni_at_ao.c 3 Driver for NI AT-AO-6/10 boards 4 5 COMEDI - Linux Control and Measurement Device Interface 6 Copyright (C) 2000,2002 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: ni_at_ao 25Description: National Instruments AT-AO-6/10 26Devices: [National Instruments] AT-AO-6 (at-ao-6), AT-AO-10 (at-ao-10) 27Status: should work 28Author: ds 29Updated: Sun Dec 26 12:26:28 EST 2004 30 31Configuration options: 32 [0] - I/O port base address 33 [1] - IRQ (unused) 34 [2] - DMA (unused) 35 [3] - analog output range, set by jumpers on hardware (0 for -10 to 10V 36 bipolar, 1 for 0V to 10V unipolar) 37 38*/ 39/* 40 * Register-level programming information can be found in NI 41 * document 320379.pdf. 42 */ 43 44#include "../comedidev.h" 45 46#include <linux/ioport.h> 47 48/* board egisters */ 49/* registers with _2_ are accessed when GRP2WR is set in CFG1 */ 50 51#define ATAO_SIZE 0x20 52 53#define ATAO_2_DMATCCLR 0x00 /* W 16 */ 54#define ATAO_DIN 0x00 /* R 16 */ 55#define ATAO_DOUT 0x00 /* W 16 */ 56 57#define ATAO_CFG2 0x02 /* W 16 */ 58#define CALLD1 0x8000 59#define CALLD0 0x4000 60#define FFRTEN 0x2000 61#define DAC2S8 0x1000 62#define DAC2S6 0x0800 63#define DAC2S4 0x0400 64#define DAC2S2 0x0200 65#define DAC2S0 0x0100 66#define LDAC8 0x0080 67#define LDAC6 0x0040 68#define LDAC4 0x0020 69#define LDAC2 0x0010 70#define LDAC0 0x0008 71#define PROMEN 0x0004 72#define SCLK 0x0002 73#define SDATA 0x0001 74 75#define ATAO_2_INT1CLR 0x02 /* W 16 */ 76 77#define ATAO_CFG3 0x04 /* W 16 */ 78#define DMAMODE 0x0040 79#define CLKOUT 0x0020 80#define RCLKEN 0x0010 81#define DOUTEN2 0x0008 82#define DOUTEN1 0x0004 83#define EN2_5V 0x0002 84#define SCANEN 0x0001 85 86#define ATAO_2_INT2CLR 0x04 /* W 16 */ 87 88#define ATAO_82C53_BASE 0x06 /* RW 8 */ 89 90#define ATAO_82C53_CNTR1 0x06 /* RW 8 */ 91#define ATAO_82C53_CNTR2 0x07 /* RW 8 */ 92#define ATAO_82C53_CNTR3 0x08 /* RW 8 */ 93#define ATAO_82C53_CNTRCMD 0x09 /* W 8 */ 94#define CNTRSEL1 0x80 95#define CNTRSEL0 0x40 96#define RWSEL1 0x20 97#define RWSEL0 0x10 98#define MODESEL2 0x08 99#define MODESEL1 0x04 100#define MODESEL0 0x02 101#define BCDSEL 0x01 102 /* read-back command */ 103#define COUNT 0x20 104#define STATUS 0x10 105#define CNTR3 0x08 106#define CNTR2 0x04 107#define CNTR1 0x02 108 /* status */ 109#define OUT 0x80 110#define _NULL 0x40 111#define RW1 0x20 112#define RW0 0x10 113#define MODE2 0x08 114#define MODE1 0x04 115#define MODE0 0x02 116#define BCD 0x01 117 118#define ATAO_2_RTSISHFT 0x06 /* W 8 */ 119#define RSI 0x01 120 121#define ATAO_2_RTSISTRB 0x07 /* W 8 */ 122 123#define ATAO_CFG1 0x0a /* W 16 */ 124#define EXTINT2EN 0x8000 125#define EXTINT1EN 0x4000 126#define CNTINT2EN 0x2000 127#define CNTINT1EN 0x1000 128#define TCINTEN 0x0800 129#define CNT1SRC 0x0400 130#define CNT2SRC 0x0200 131#define FIFOEN 0x0100 132#define GRP2WR 0x0080 133#define EXTUPDEN 0x0040 134#define DMARQ 0x0020 135#define DMAEN 0x0010 136#define CH_mask 0x000f 137#define ATAO_STATUS 0x0a /* R 16 */ 138#define FH 0x0040 139#define FE 0x0020 140#define FF 0x0010 141#define INT2 0x0008 142#define INT1 0x0004 143#define TCINT 0x0002 144#define PROMOUT 0x0001 145 146#define ATAO_FIFO_WRITE 0x0c /* W 16 */ 147#define ATAO_FIFO_CLEAR 0x0c /* R 16 */ 148#define ATAO_DACn(x) (0x0c + 2*(x)) /* W */ 149 150/* 151 * Board descriptions for two imaginary boards. Describing the 152 * boards in this way is optional, and completely driver-dependent. 153 * Some drivers use arrays such as this, other do not. 154 */ 155struct atao_board { 156 const char *name; 157 int n_ao_chans; 158}; 159 160static const struct atao_board atao_boards[] = { 161 { 162 .name = "ai-ao-6", 163 .n_ao_chans = 6, 164 }, 165 { 166 .name = "ai-ao-10", 167 .n_ao_chans = 10, 168 }, 169}; 170 171#define thisboard ((struct atao_board *)dev->board_ptr) 172 173struct atao_private { 174 175 unsigned short cfg1; 176 unsigned short cfg2; 177 unsigned short cfg3; 178 179 /* Used for AO readback */ 180 unsigned int ao_readback[10]; 181}; 182 183#define devpriv ((struct atao_private *)dev->private) 184 185static int atao_attach(struct comedi_device *dev, struct comedi_devconfig *it); 186static int atao_detach(struct comedi_device *dev); 187static struct comedi_driver driver_atao = { 188 .driver_name = "ni_at_ao", 189 .module = THIS_MODULE, 190 .attach = atao_attach, 191 .detach = atao_detach, 192 .board_name = &atao_boards[0].name, 193 .offset = sizeof(struct atao_board), 194 .num_names = ARRAY_SIZE(atao_boards), 195}; 196 197COMEDI_INITCLEANUP(driver_atao); 198 199static void atao_reset(struct comedi_device *dev); 200 201static int atao_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s, 202 struct comedi_insn *insn, unsigned int *data); 203static int atao_ao_rinsn(struct comedi_device *dev, struct comedi_subdevice *s, 204 struct comedi_insn *insn, unsigned int *data); 205static int atao_dio_insn_bits(struct comedi_device *dev, 206 struct comedi_subdevice *s, 207 struct comedi_insn *insn, unsigned int *data); 208static int atao_dio_insn_config(struct comedi_device *dev, 209 struct comedi_subdevice *s, 210 struct comedi_insn *insn, unsigned int *data); 211static int atao_calib_insn_read(struct comedi_device *dev, 212 struct comedi_subdevice *s, 213 struct comedi_insn *insn, unsigned int *data); 214static int atao_calib_insn_write(struct comedi_device *dev, 215 struct comedi_subdevice *s, 216 struct comedi_insn *insn, unsigned int *data); 217 218static int atao_attach(struct comedi_device *dev, struct comedi_devconfig *it) 219{ 220 struct comedi_subdevice *s; 221 unsigned long iobase; 222 int ao_unipolar; 223 224 iobase = it->options[0]; 225 if (iobase == 0) 226 iobase = 0x1c0; 227 ao_unipolar = it->options[3]; 228 229 printk(KERN_INFO "comedi%d: ni_at_ao: 0x%04lx", dev->minor, iobase); 230 231 if (!request_region(iobase, ATAO_SIZE, "ni_at_ao")) { 232 printk(" I/O port conflict\n"); 233 return -EIO; 234 } 235 dev->iobase = iobase; 236 237 /* dev->board_ptr = atao_probe(dev); */ 238 239 dev->board_name = thisboard->name; 240 241 if (alloc_private(dev, sizeof(struct atao_private)) < 0) 242 return -ENOMEM; 243 244 if (alloc_subdevices(dev, 4) < 0) 245 return -ENOMEM; 246 247 s = dev->subdevices + 0; 248 /* analog output subdevice */ 249 s->type = COMEDI_SUBD_AO; 250 s->subdev_flags = SDF_WRITABLE; 251 s->n_chan = thisboard->n_ao_chans; 252 s->maxdata = (1 << 12) - 1; 253 if (ao_unipolar) 254 s->range_table = &range_unipolar10; 255 else 256 s->range_table = &range_bipolar10; 257 s->insn_write = &atao_ao_winsn; 258 s->insn_read = &atao_ao_rinsn; 259 260 s = dev->subdevices + 1; 261 /* digital i/o subdevice */ 262 s->type = COMEDI_SUBD_DIO; 263 s->subdev_flags = SDF_READABLE | SDF_WRITABLE; 264 s->n_chan = 8; 265 s->maxdata = 1; 266 s->range_table = &range_digital; 267 s->insn_bits = atao_dio_insn_bits; 268 s->insn_config = atao_dio_insn_config; 269 270 s = dev->subdevices + 2; 271 /* caldac subdevice */ 272 s->type = COMEDI_SUBD_CALIB; 273 s->subdev_flags = SDF_WRITABLE | SDF_INTERNAL; 274 s->n_chan = 21; 275 s->maxdata = 0xff; 276 s->insn_read = atao_calib_insn_read; 277 s->insn_write = atao_calib_insn_write; 278 279 s = dev->subdevices + 3; 280 /* eeprom subdevice */ 281 /* s->type=COMEDI_SUBD_EEPROM; */ 282 s->type = COMEDI_SUBD_UNUSED; 283 284 atao_reset(dev); 285 286 printk(KERN_INFO "\n"); 287 288 return 0; 289} 290 291static int atao_detach(struct comedi_device *dev) 292{ 293 printk(KERN_INFO "comedi%d: atao: remove\n", dev->minor); 294 295 if (dev->iobase) 296 release_region(dev->iobase, ATAO_SIZE); 297 298 return 0; 299} 300 301static void atao_reset(struct comedi_device *dev) 302{ 303 /* This is the reset sequence described in the manual */ 304 305 devpriv->cfg1 = 0; 306 outw(devpriv->cfg1, dev->iobase + ATAO_CFG1); 307 308 outb(RWSEL0 | MODESEL2, dev->iobase + ATAO_82C53_CNTRCMD); 309 outb(0x03, dev->iobase + ATAO_82C53_CNTR1); 310 outb(CNTRSEL0 | RWSEL0 | MODESEL2, dev->iobase + ATAO_82C53_CNTRCMD); 311 312 devpriv->cfg2 = 0; 313 outw(devpriv->cfg2, dev->iobase + ATAO_CFG2); 314 315 devpriv->cfg3 = 0; 316 outw(devpriv->cfg3, dev->iobase + ATAO_CFG3); 317 318 inw(dev->iobase + ATAO_FIFO_CLEAR); 319 320 devpriv->cfg1 |= GRP2WR; 321 outw(devpriv->cfg1, dev->iobase + ATAO_CFG1); 322 323 outw(0, dev->iobase + ATAO_2_INT1CLR); 324 outw(0, dev->iobase + ATAO_2_INT2CLR); 325 outw(0, dev->iobase + ATAO_2_DMATCCLR); 326 327 devpriv->cfg1 &= ~GRP2WR; 328 outw(devpriv->cfg1, dev->iobase + ATAO_CFG1); 329} 330 331static int atao_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s, 332 struct comedi_insn *insn, unsigned int *data) 333{ 334 int i; 335 int chan = CR_CHAN(insn->chanspec); 336 short bits; 337 338 for (i = 0; i < insn->n; i++) { 339 bits = data[i] - 0x800; 340 if (chan == 0) { 341 devpriv->cfg1 |= GRP2WR; 342 outw(devpriv->cfg1, dev->iobase + ATAO_CFG1); 343 } 344 outw(bits, dev->iobase + ATAO_DACn(chan)); 345 if (chan == 0) { 346 devpriv->cfg1 &= ~GRP2WR; 347 outw(devpriv->cfg1, dev->iobase + ATAO_CFG1); 348 } 349 devpriv->ao_readback[chan] = data[i]; 350 } 351 352 return i; 353} 354 355static int atao_ao_rinsn(struct comedi_device *dev, struct comedi_subdevice *s, 356 struct comedi_insn *insn, unsigned int *data) 357{ 358 int i; 359 int chan = CR_CHAN(insn->chanspec); 360 361 for (i = 0; i < insn->n; i++) 362 data[i] = devpriv->ao_readback[chan]; 363 364 return i; 365} 366 367static int atao_dio_insn_bits(struct comedi_device *dev, 368 struct comedi_subdevice *s, 369 struct comedi_insn *insn, unsigned int *data) 370{ 371 if (insn->n != 2) 372 return -EINVAL; 373 374 if (data[0]) { 375 s->state &= ~data[0]; 376 s->state |= data[0] & data[1]; 377 outw(s->state, dev->iobase + ATAO_DOUT); 378 } 379 380 data[1] = inw(dev->iobase + ATAO_DIN); 381 382 return 2; 383} 384 385static int atao_dio_insn_config(struct comedi_device *dev, 386 struct comedi_subdevice *s, 387 struct comedi_insn *insn, unsigned int *data) 388{ 389 int chan = CR_CHAN(insn->chanspec); 390 unsigned int mask, bit; 391 392 /* The input or output configuration of each digital line is 393 * configured by a special insn_config instruction. chanspec 394 * contains the channel to be changed, and data[0] contains the 395 * value COMEDI_INPUT or COMEDI_OUTPUT. */ 396 397 mask = (chan < 4) ? 0x0f : 0xf0; 398 bit = (chan < 4) ? DOUTEN1 : DOUTEN2; 399 400 switch (data[0]) { 401 case INSN_CONFIG_DIO_OUTPUT: 402 s->io_bits |= mask; 403 devpriv->cfg3 |= bit; 404 break; 405 case INSN_CONFIG_DIO_INPUT: 406 s->io_bits &= ~mask; 407 devpriv->cfg3 &= ~bit; 408 break; 409 case INSN_CONFIG_DIO_QUERY: 410 data[1] = 411 (s->io_bits & (1 << chan)) ? COMEDI_OUTPUT : COMEDI_INPUT; 412 return insn->n; 413 break; 414 default: 415 return -EINVAL; 416 break; 417 } 418 419 outw(devpriv->cfg3, dev->iobase + ATAO_CFG3); 420 421 return 1; 422} 423 424/* 425 * Figure 2-1 in the manual shows 3 chips labeled DAC8800, which 426 * are 8-channel 8-bit DACs. These are most likely the calibration 427 * DACs. It is not explicitly stated in the manual how to access 428 * the caldacs, but we can guess. 429 */ 430static int atao_calib_insn_read(struct comedi_device *dev, 431 struct comedi_subdevice *s, 432 struct comedi_insn *insn, unsigned int *data) 433{ 434 int i; 435 for (i = 0; i < insn->n; i++) 436 data[i] = 0; /* XXX */ 437 return insn->n; 438} 439 440static int atao_calib_insn_write(struct comedi_device *dev, 441 struct comedi_subdevice *s, 442 struct comedi_insn *insn, unsigned int *data) 443{ 444 unsigned int bitstring, bit; 445 unsigned int chan = CR_CHAN(insn->chanspec); 446 447 bitstring = ((chan & 0x7) << 8) | (data[insn->n - 1] & 0xff); 448 449 for (bit = 1 << (11 - 1); bit; bit >>= 1) { 450 outw(devpriv->cfg2 | ((bit & bitstring) ? SDATA : 0), 451 dev->iobase + ATAO_CFG2); 452 outw(devpriv->cfg2 | SCLK | ((bit & bitstring) ? SDATA : 0), 453 dev->iobase + ATAO_CFG2); 454 } 455 /* strobe the appropriate caldac */ 456 outw(devpriv->cfg2 | (((chan >> 3) + 1) << 14), 457 dev->iobase + ATAO_CFG2); 458 outw(devpriv->cfg2, dev->iobase + ATAO_CFG2); 459 460 return insn->n; 461} 462 463MODULE_AUTHOR("Comedi http://www.comedi.org"); 464MODULE_DESCRIPTION("Comedi low-level driver"); 465MODULE_LICENSE("GPL"); 466