rti800.c revision 8629efa4cbf6f89a54a85af4b8bc31762af01800
1/* 2 comedi/drivers/rti800.c 3 Hardware driver for Analog Devices RTI-800/815 board 4 5 COMEDI - Linux Control and Measurement Device Interface 6 Copyright (C) 1998 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: rti800 25Description: Analog Devices RTI-800/815 26Author: ds 27Status: unknown 28Updated: Fri, 05 Sep 2008 14:50:44 +0100 29Devices: [Analog Devices] RTI-800 (rti800), RTI-815 (rti815) 30 31Configuration options: 32 [0] - I/O port base address 33 [1] - IRQ 34 [2] - A/D reference 35 0 = differential 36 1 = pseudodifferential (common) 37 2 = single-ended 38 [3] - A/D range 39 0 = [-10,10] 40 1 = [-5,5] 41 2 = [0,10] 42 [4] - A/D encoding 43 0 = two's complement 44 1 = straight binary 45 [5] - DAC 0 range 46 0 = [-10,10] 47 1 = [0,10] 48 [6] - DAC 0 encoding 49 0 = two's complement 50 1 = straight binary 51 [7] - DAC 1 range (same as DAC 0) 52 [8] - DAC 1 encoding (same as DAC 0) 53*/ 54 55#include "../comedidev.h" 56 57#include <linux/ioport.h> 58 59#define RTI800_SIZE 16 60 61#define RTI800_CSR 0 62#define RTI800_MUXGAIN 1 63#define RTI800_CONVERT 2 64#define RTI800_ADCLO 3 65#define RTI800_ADCHI 4 66#define RTI800_DAC0LO 5 67#define RTI800_DAC0HI 6 68#define RTI800_DAC1LO 7 69#define RTI800_DAC1HI 8 70#define RTI800_CLRFLAGS 9 71#define RTI800_DI 10 72#define RTI800_DO 11 73#define RTI800_9513A_DATA 12 74#define RTI800_9513A_CNTRL 13 75#define RTI800_9513A_STATUS 13 76 77/* 78 * flags for CSR register 79 */ 80 81#define RTI800_BUSY 0x80 82#define RTI800_DONE 0x40 83#define RTI800_OVERRUN 0x20 84#define RTI800_TCR 0x10 85#define RTI800_DMA_ENAB 0x08 86#define RTI800_INTR_TC 0x04 87#define RTI800_INTR_EC 0x02 88#define RTI800_INTR_OVRN 0x01 89 90#define Am9513_8BITBUS 91 92#define Am9513_output_control(a) outb(a, dev->iobase+RTI800_9513A_CNTRL) 93#define Am9513_output_data(a) outb(a, dev->iobase+RTI800_9513A_DATA) 94#define Am9513_input_data() inb(dev->iobase+RTI800_9513A_DATA) 95#define Am9513_input_status() inb(dev->iobase+RTI800_9513A_STATUS) 96 97#include "am9513.h" 98 99static const struct comedi_lrange range_rti800_ai_10_bipolar = { 4, { 100 BIP_RANGE(10), 101 BIP_RANGE(1), 102 BIP_RANGE(0.1), 103 BIP_RANGE(0.02) 104 } 105}; 106static const struct comedi_lrange range_rti800_ai_5_bipolar = { 4, { 107 BIP_RANGE(5), 108 BIP_RANGE(0.5), 109 BIP_RANGE(0.05), 110 BIP_RANGE(0.01) 111 } 112}; 113static const struct comedi_lrange range_rti800_ai_unipolar = { 4, { 114 UNI_RANGE(10), 115 UNI_RANGE(1), 116 UNI_RANGE(0.1), 117 UNI_RANGE(0.02) 118 } 119}; 120 121struct rti800_board { 122 123 const char *name; 124 int has_ao; 125}; 126 127static const struct rti800_board boardtypes[] = { 128 {"rti800", 0}, 129 {"rti815", 1}, 130}; 131 132#define this_board ((const struct rti800_board *)dev->board_ptr) 133 134static int rti800_attach(struct comedi_device *dev, struct comedi_devconfig *it); 135static int rti800_detach(struct comedi_device *dev); 136static struct comedi_driver driver_rti800 = { 137 .driver_name = "rti800", 138 .module = THIS_MODULE, 139 .attach = rti800_attach, 140 .detach = rti800_detach, 141 .num_names = ARRAY_SIZE(boardtypes), 142 .board_name = &boardtypes[0].name, 143 .offset = sizeof(struct rti800_board), 144}; 145 146COMEDI_INITCLEANUP(driver_rti800); 147 148static irqreturn_t rti800_interrupt(int irq, void *dev); 149 150struct rti800_private { 151 enum { 152 adc_diff, adc_pseudodiff, adc_singleended 153 } adc_mux; 154 enum { 155 adc_bipolar10, adc_bipolar5, adc_unipolar10 156 } adc_range; 157 enum { 158 adc_2comp, adc_straight 159 } adc_coding; 160 enum { 161 dac_bipolar10, dac_unipolar10 162 } dac0_range, dac1_range; 163 enum { 164 dac_2comp, dac_straight 165 } dac0_coding, dac1_coding; 166 const struct comedi_lrange *ao_range_type_list[2]; 167 unsigned int ao_readback[2]; 168 int muxgain_bits; 169}; 170 171#define devpriv ((struct rti800_private *)dev->private) 172 173#define RTI800_TIMEOUT 100 174 175static irqreturn_t rti800_interrupt(int irq, void *dev) 176{ 177 return IRQ_HANDLED; 178} 179 180/* settling delay times in usec for different gains */ 181static const int gaindelay[] = { 10, 20, 40, 80 }; 182 183static int rti800_ai_insn_read(struct comedi_device *dev, struct comedi_subdevice *s, 184 struct comedi_insn *insn, unsigned int *data) 185{ 186 int i, t; 187 int status; 188 int chan = CR_CHAN(insn->chanspec); 189 unsigned gain = CR_RANGE(insn->chanspec); 190 unsigned muxgain_bits; 191 192 inb(dev->iobase + RTI800_ADCHI); 193 outb(0, dev->iobase + RTI800_CLRFLAGS); 194 195 muxgain_bits = chan | (gain << 5); 196 if (muxgain_bits != devpriv->muxgain_bits) { 197 devpriv->muxgain_bits = muxgain_bits; 198 outb(devpriv->muxgain_bits, dev->iobase + RTI800_MUXGAIN); 199 /* without a delay here, the RTI_OVERRUN bit 200 * gets set, and you will have an error. */ 201 if (insn->n > 0) { 202 BUG_ON(gain >= ARRAY_SIZE(gaindelay)); 203 comedi_udelay(gaindelay[gain]); 204 } 205 } 206 207 for (i = 0; i < insn->n; i++) { 208 outb(0, dev->iobase + RTI800_CONVERT); 209 for (t = RTI800_TIMEOUT; t; t--) { 210 status = inb(dev->iobase + RTI800_CSR); 211 if (status & RTI800_OVERRUN) { 212 rt_printk("rti800: a/d overrun\n"); 213 outb(0, dev->iobase + RTI800_CLRFLAGS); 214 return -EIO; 215 } 216 if (status & RTI800_DONE) 217 break; 218 comedi_udelay(1); 219 } 220 if (t == 0) { 221 rt_printk("rti800: timeout\n"); 222 return -ETIME; 223 } 224 data[i] = inb(dev->iobase + RTI800_ADCLO); 225 data[i] |= (0xf & inb(dev->iobase + RTI800_ADCHI)) << 8; 226 227 if (devpriv->adc_coding == adc_2comp) { 228 data[i] ^= 0x800; 229 } 230 } 231 232 return i; 233} 234 235static int rti800_ao_insn_read(struct comedi_device *dev, struct comedi_subdevice *s, 236 struct comedi_insn *insn, unsigned int *data) 237{ 238 int i; 239 int chan = CR_CHAN(insn->chanspec); 240 241 for (i = 0; i < insn->n; i++) 242 data[i] = devpriv->ao_readback[chan]; 243 244 return i; 245} 246 247static int rti800_ao_insn_write(struct comedi_device *dev, struct comedi_subdevice *s, 248 struct comedi_insn *insn, unsigned int *data) 249{ 250 int chan = CR_CHAN(insn->chanspec); 251 int d; 252 int i; 253 254 for (i = 0; i < insn->n; i++) { 255 devpriv->ao_readback[chan] = d = data[i]; 256 if (devpriv->dac0_coding == dac_2comp) { 257 d ^= 0x800; 258 } 259 outb(d & 0xff, 260 dev->iobase + (chan ? RTI800_DAC1LO : RTI800_DAC0LO)); 261 outb(d >> 8, 262 dev->iobase + (chan ? RTI800_DAC1HI : RTI800_DAC0HI)); 263 } 264 return i; 265} 266 267static int rti800_di_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s, 268 struct comedi_insn *insn, unsigned int *data) 269{ 270 if (insn->n != 2) 271 return -EINVAL; 272 data[1] = inb(dev->iobase + RTI800_DI); 273 return 2; 274} 275 276static int rti800_do_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s, 277 struct comedi_insn *insn, unsigned int *data) 278{ 279 if (insn->n != 2) 280 return -EINVAL; 281 282 if (data[0]) { 283 s->state &= ~data[0]; 284 s->state |= data[0] & data[1]; 285 /* Outputs are inverted... */ 286 outb(s->state ^ 0xff, dev->iobase + RTI800_DO); 287 } 288 289 data[1] = s->state; 290 291 return 2; 292} 293 294/* 295 options[0] - I/O port 296 options[1] - irq 297 options[2] - a/d mux 298 0=differential, 1=pseudodiff, 2=single 299 options[3] - a/d range 300 0=bipolar10, 1=bipolar5, 2=unipolar10 301 options[4] - a/d coding 302 0=2's comp, 1=straight binary 303 options[5] - dac0 range 304 0=bipolar10, 1=unipolar10 305 options[6] - dac0 coding 306 0=2's comp, 1=straight binary 307 options[7] - dac1 range 308 options[8] - dac1 coding 309 */ 310 311static int rti800_attach(struct comedi_device *dev, struct comedi_devconfig *it) 312{ 313 unsigned int irq; 314 unsigned long iobase; 315 int ret; 316 struct comedi_subdevice *s; 317 318 iobase = it->options[0]; 319 printk("comedi%d: rti800: 0x%04lx ", dev->minor, iobase); 320 if (!request_region(iobase, RTI800_SIZE, "rti800")) { 321 printk("I/O port conflict\n"); 322 return -EIO; 323 } 324 dev->iobase = iobase; 325 326#ifdef DEBUG 327 printk("fingerprint=%x,%x,%x,%x,%x ", 328 inb(dev->iobase + 0), 329 inb(dev->iobase + 1), 330 inb(dev->iobase + 2), 331 inb(dev->iobase + 3), inb(dev->iobase + 4)); 332#endif 333 334 outb(0, dev->iobase + RTI800_CSR); 335 inb(dev->iobase + RTI800_ADCHI); 336 outb(0, dev->iobase + RTI800_CLRFLAGS); 337 338 irq = it->options[1]; 339 if (irq) { 340 printk("( irq = %u )", irq); 341 ret = comedi_request_irq(irq, rti800_interrupt, 0, 342 "rti800", dev); 343 if (ret < 0) { 344 printk(" Failed to allocate IRQ\n"); 345 return ret; 346 } 347 dev->irq = irq; 348 } else { 349 printk("( no irq )"); 350 } 351 352 dev->board_name = this_board->name; 353 354 ret = alloc_subdevices(dev, 4); 355 if (ret < 0) 356 return ret; 357 358 ret = alloc_private(dev, sizeof(struct rti800_private)); 359 if (ret < 0) 360 return ret; 361 362 devpriv->adc_mux = it->options[2]; 363 devpriv->adc_range = it->options[3]; 364 devpriv->adc_coding = it->options[4]; 365 devpriv->dac0_range = it->options[5]; 366 devpriv->dac0_coding = it->options[6]; 367 devpriv->dac1_range = it->options[7]; 368 devpriv->dac1_coding = it->options[8]; 369 devpriv->muxgain_bits = -1; 370 371 s = dev->subdevices + 0; 372 /* ai subdevice */ 373 s->type = COMEDI_SUBD_AI; 374 s->subdev_flags = SDF_READABLE | SDF_GROUND; 375 s->n_chan = (devpriv->adc_mux ? 16 : 8); 376 s->insn_read = rti800_ai_insn_read; 377 s->maxdata = 0xfff; 378 switch (devpriv->adc_range) { 379 case adc_bipolar10: 380 s->range_table = &range_rti800_ai_10_bipolar; 381 break; 382 case adc_bipolar5: 383 s->range_table = &range_rti800_ai_5_bipolar; 384 break; 385 case adc_unipolar10: 386 s->range_table = &range_rti800_ai_unipolar; 387 break; 388 } 389 390 s++; 391 if (this_board->has_ao) { 392 /* ao subdevice (only on rti815) */ 393 s->type = COMEDI_SUBD_AO; 394 s->subdev_flags = SDF_WRITABLE; 395 s->n_chan = 2; 396 s->insn_read = rti800_ao_insn_read; 397 s->insn_write = rti800_ao_insn_write; 398 s->maxdata = 0xfff; 399 s->range_table_list = devpriv->ao_range_type_list; 400 switch (devpriv->dac0_range) { 401 case dac_bipolar10: 402 devpriv->ao_range_type_list[0] = &range_bipolar10; 403 break; 404 case dac_unipolar10: 405 devpriv->ao_range_type_list[0] = &range_unipolar10; 406 break; 407 } 408 switch (devpriv->dac1_range) { 409 case dac_bipolar10: 410 devpriv->ao_range_type_list[1] = &range_bipolar10; 411 break; 412 case dac_unipolar10: 413 devpriv->ao_range_type_list[1] = &range_unipolar10; 414 break; 415 } 416 } else { 417 s->type = COMEDI_SUBD_UNUSED; 418 } 419 420 s++; 421 /* di */ 422 s->type = COMEDI_SUBD_DI; 423 s->subdev_flags = SDF_READABLE; 424 s->n_chan = 8; 425 s->insn_bits = rti800_di_insn_bits; 426 s->maxdata = 1; 427 s->range_table = &range_digital; 428 429 s++; 430 /* do */ 431 s->type = COMEDI_SUBD_DO; 432 s->subdev_flags = SDF_WRITABLE; 433 s->n_chan = 8; 434 s->insn_bits = rti800_do_insn_bits; 435 s->maxdata = 1; 436 s->range_table = &range_digital; 437 438/* don't yet know how to deal with counter/timers */ 439#if 0 440 s++; 441 /* do */ 442 s->type = COMEDI_SUBD_TIMER; 443#endif 444 445 printk("\n"); 446 447 return 0; 448} 449 450static int rti800_detach(struct comedi_device *dev) 451{ 452 printk("comedi%d: rti800: remove\n", dev->minor); 453 454 if (dev->iobase) 455 release_region(dev->iobase, RTI800_SIZE); 456 457 if (dev->irq) 458 comedi_free_irq(dev->irq, dev); 459 460 return 0; 461} 462