unioxx5.c revision da91b2692e0939b307f9047192d2b9fe07793e7a
1/*************************************************************************** 2 * * 3 * comedi/drivers/unioxx5.c * 4 * Driver for Fastwel UNIOxx-5 (analog and digital i/o) boards. * 5 * * 6 * Copyright (C) 2006 Kruchinin Daniil (asgard) [asgard@etersoft.ru] * 7 * * 8 * COMEDI - Linux Control and Measurement Device Interface * 9 * Copyright (C) 1998,2000 David A. Schleef <ds@schleef.org> * 10 * * 11 * This program is free software; you can redistribute it and/or modify * 12 * it under the terms of the GNU General Public License as published by * 13 * the Free Software Foundation; either version 2 of the License, or * 14 * (at your option) any later version. * 15 * * 16 * This program is distributed in the hope that it will be useful, * 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of * 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * 19 * GNU General Public License for more details. * 20 * * 21 * You should have received a copy of the GNU General Public License * 22 * along with this program; if not, write to the Free Software * 23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * 24 * * 25 ***************************************************************************/ 26/* 27 28Driver: unioxx5 29Description: Driver for Fastwel UNIOxx-5 (analog and digital i/o) boards. 30Author: Kruchinin Daniil (asgard) <asgard@etersoft.ru> 31Status: unknown 32Updated: 2006-10-09 33Devices: [Fastwel] UNIOxx-5 (unioxx5), 34 35 This card supports digital and analog I/O. It written for g01 36 subdevices only. 37 channels range: 0 .. 23 dio channels 38 and 0 .. 11 analog modules range 39 During attaching unioxx5 module displays modules identifiers 40 (see dmesg after comedi_config) in format: 41 | [module_number] module_id | 42 43*/ 44 45#include "../comedidev.h" 46#include <linux/ioport.h> 47 48#define DRIVER_NAME "unioxx5" 49#define UNIOXX5_SIZE 0x10 50#define UNIOXX5_SUBDEV_BASE 0xA000 /* base addr of first subdev */ 51#define UNIOXX5_SUBDEV_ODDS 0x400 52 53/* modules types */ 54#define MODULE_DIGITAL 0 55#define MODULE_OUTPUT_MASK 0x80 /* analog input/output */ 56 57/* constants for digital i/o */ 58#define UNIOXX5_NUM_OF_CHANS 24 59 60/* constants for analog i/o */ 61#define TxBE 0x10 /* transmit buffer enable */ 62#define RxCA 0x20 /* 1 receive character available */ 63#define Rx2CA 0x40 /* 2 receive character available */ 64#define Rx4CA 0x80 /* 4 receive character available */ 65 66/* bytes mask errors */ 67#define Rx2CA_ERR_MASK 0x04 /* 2 bytes receiving error */ 68#define Rx4CA_ERR_MASK 0x08 /* 4 bytes receiving error */ 69 70/* channel modes */ 71#define ALL_2_INPUT 0 /* config all digital channels to input */ 72#define ALL_2_OUTPUT 1 /* config all digital channels to output */ 73 74/* 'private' structure for each subdevice */ 75struct unioxx5_subd_priv { 76 int usp_iobase; 77 unsigned char usp_module_type[12]; /* 12 modules. each can be 70L or 73L */ 78 unsigned char usp_extra_data[12][4]; /* for saving previous written value for analog modules */ 79 unsigned char usp_prev_wr_val[3]; /* previous written value */ 80 unsigned char usp_prev_cn_val[3]; /* previous channel value */ 81}; 82 83static int unioxx5_attach(struct comedi_device *dev, struct comedi_devconfig *it); 84static int unioxx5_subdev_write(struct comedi_device *dev, struct comedi_subdevice *subdev, 85 struct comedi_insn *insn, unsigned int *data); 86static int unioxx5_subdev_read(struct comedi_device *dev, struct comedi_subdevice *subdev, 87 struct comedi_insn *insn, unsigned int *data); 88static int unioxx5_insn_config(struct comedi_device *dev, struct comedi_subdevice *subdev, 89 struct comedi_insn *insn, unsigned int *data); 90static int unioxx5_detach(struct comedi_device *dev); 91static int __unioxx5_subdev_init(struct comedi_subdevice *subdev, int subdev_iobase, 92 int minor); 93static int __unioxx5_digital_write(struct unioxx5_subd_priv *usp, unsigned int *data, 94 int channel, int minor); 95static int __unioxx5_digital_read(struct unioxx5_subd_priv *usp, unsigned int *data, 96 int channel, int minor); 97/* static void __unioxx5_digital_config(struct unioxx5_subd_priv* usp, int mode); */ 98static int __unioxx5_analog_write(struct unioxx5_subd_priv *usp, unsigned int *data, 99 int channel, int minor); 100static int __unioxx5_analog_read(struct unioxx5_subd_priv *usp, unsigned int *data, 101 int channel, int minor); 102static int __unioxx5_define_chan_offset(int chan_num); 103static void __unioxx5_analog_config(struct unioxx5_subd_priv *usp, int channel); 104 105static struct comedi_driver unioxx5_driver = { 106 driver_name:DRIVER_NAME, 107 module:THIS_MODULE, 108 attach:unioxx5_attach, 109 detach:unioxx5_detach 110}; 111 112COMEDI_INITCLEANUP(unioxx5_driver); 113 114static int unioxx5_attach(struct comedi_device *dev, struct comedi_devconfig *it) 115{ 116 int iobase, i, n_subd; 117 int id, num, ba; 118 119 iobase = it->options[0]; 120 121 dev->board_name = DRIVER_NAME; 122 dev->iobase = iobase; 123 iobase += UNIOXX5_SUBDEV_BASE; 124 125 /* defining number of subdevices and getting they types (it must be 'g01') */ 126 for (i = n_subd = 0, ba = iobase; i < 4; i++, ba += UNIOXX5_SUBDEV_ODDS) { 127 id = inb(ba + 0xE); 128 num = inb(ba + 0xF); 129 130 if (id != 'g' || num != 1) 131 continue; 132 133 n_subd++; 134 } 135 136 /* unioxx5 can has from two to four subdevices */ 137 if (n_subd < 2) { 138 printk(KERN_ERR 139 "your card must has at least 2 'g01' subdevices\n"); 140 return -1; 141 } 142 143 if (alloc_subdevices(dev, n_subd) < 0) { 144 printk(KERN_ERR "out of memory\n"); 145 return -ENOMEM; 146 } 147 148 /* initializing each of for same subdevices */ 149 for (i = 0; i < n_subd; i++, iobase += UNIOXX5_SUBDEV_ODDS) { 150 if (__unioxx5_subdev_init(&dev->subdevices[i], iobase, 151 dev->minor) < 0) 152 return -1; 153 } 154 155 printk("attached\n"); 156 return 0; 157} 158 159static int unioxx5_subdev_read(struct comedi_device *dev, struct comedi_subdevice *subdev, 160 struct comedi_insn *insn, unsigned int *data) 161{ 162 struct unioxx5_subd_priv *usp = subdev->private; 163 int channel, type; 164 165 channel = CR_CHAN(insn->chanspec); 166 type = usp->usp_module_type[channel / 2]; /* defining module type(analog or digital) */ 167 168 if (type == MODULE_DIGITAL) { 169 if (!__unioxx5_digital_read(usp, data, channel, dev->minor)) 170 return -1; 171 } else { 172 if (!__unioxx5_analog_read(usp, data, channel, dev->minor)) 173 return -1; 174 } 175 176 return 1; 177} 178 179static int unioxx5_subdev_write(struct comedi_device *dev, struct comedi_subdevice *subdev, 180 struct comedi_insn *insn, unsigned int *data) 181{ 182 struct unioxx5_subd_priv *usp = subdev->private; 183 int channel, type; 184 185 channel = CR_CHAN(insn->chanspec); 186 type = usp->usp_module_type[channel / 2]; /* defining module type(analog or digital) */ 187 188 if (type == MODULE_DIGITAL) { 189 if (!__unioxx5_digital_write(usp, data, channel, dev->minor)) 190 return -1; 191 } else { 192 if (!__unioxx5_analog_write(usp, data, channel, dev->minor)) 193 return -1; 194 } 195 196 return 1; 197} 198 199/* for digital modules only */ 200static int unioxx5_insn_config(struct comedi_device *dev, struct comedi_subdevice *subdev, 201 struct comedi_insn *insn, unsigned int *data) 202{ 203 int channel_offset, flags, channel = CR_CHAN(insn->chanspec), type; 204 struct unioxx5_subd_priv *usp = subdev->private; 205 int mask = 1 << (channel & 0x07); 206 207 type = usp->usp_module_type[channel / 2]; 208 209 if (type != MODULE_DIGITAL) { 210 printk(KERN_ERR 211 "comedi%d: channel configuration accessible only for digital modules\n", 212 dev->minor); 213 return -1; 214 } 215 216 if ((channel_offset = __unioxx5_define_chan_offset(channel)) < 0) { 217 printk(KERN_ERR 218 "comedi%d: undefined channel %d. channel range is 0 .. 23\n", 219 dev->minor, channel); 220 return -1; 221 } 222 223 /* gets previously written value */ 224 flags = usp->usp_prev_cn_val[channel_offset - 1]; 225 226 switch (*data) { 227 case COMEDI_INPUT: 228 flags &= ~mask; 229 break; 230 case COMEDI_OUTPUT: 231 flags |= mask; 232 break; 233 default: 234 printk(KERN_ERR "comedi%d: unknown flag\n", dev->minor); 235 return -1; 236 } 237 238 /* *\ 239 * sets channels buffer to 1(after this we are allowed to * 240 * change channel type on input or output) * 241 \* */ 242 outb(1, usp->usp_iobase + 0); 243 outb(flags, usp->usp_iobase + channel_offset); /* changes type of _one_ channel */ 244 outb(0, usp->usp_iobase + 0); /* sets channels bank to 0(allows directly input/output) */ 245 usp->usp_prev_cn_val[channel_offset - 1] = flags; /* saves written value */ 246 247 return 0; 248} 249 250static int unioxx5_detach(struct comedi_device *dev) 251{ 252 int i; 253 struct comedi_subdevice *subdev; 254 struct unioxx5_subd_priv *usp; 255 256 for (i = 0; i < dev->n_subdevices; i++) { 257 subdev = &dev->subdevices[i]; 258 usp = subdev->private; 259 release_region(usp->usp_iobase, UNIOXX5_SIZE); 260 kfree(subdev->private); 261 } 262 263 return 0; 264} 265 266/* initializing subdevice with given address */ 267static int __unioxx5_subdev_init(struct comedi_subdevice *subdev, int subdev_iobase, 268 int minor) 269{ 270 struct unioxx5_subd_priv *usp; 271 int i, to, ndef_flag = 0; 272 273 if (!request_region(subdev_iobase, UNIOXX5_SIZE, DRIVER_NAME)) { 274 printk(KERN_ERR "comedi%d: I/O port conflict\n", minor); 275 return -EIO; 276 } 277 278 if ((usp = (struct unioxx5_subd_priv *) kzalloc(sizeof(*usp), 279 GFP_KERNEL)) == NULL) { 280 printk(KERN_ERR "comedi%d: erorr! --> out of memory!\n", minor); 281 return -1; 282 } 283 284 usp->usp_iobase = subdev_iobase; 285 printk("comedi%d: |", minor); 286 287 /* defining modules types */ 288 for (i = 0; i < 12; i++) { 289 to = 10000; 290 291 __unioxx5_analog_config(usp, i * 2); 292 outb(i + 1, subdev_iobase + 5); /* sends channel number to card */ 293 outb('H', subdev_iobase + 6); /* requests EEPROM world */ 294 while (!(inb(subdev_iobase + 0) & TxBE)) ; /* waits while writting will be allowed */ 295 outb(0, subdev_iobase + 6); 296 297 /* waits while reading of two bytes will be allowed */ 298 while (!(inb(subdev_iobase + 0) & Rx2CA)) { 299 if (--to <= 0) { 300 ndef_flag = 1; 301 break; 302 } 303 } 304 305 if (ndef_flag) { 306 usp->usp_module_type[i] = 0; 307 ndef_flag = 0; 308 } else 309 usp->usp_module_type[i] = inb(subdev_iobase + 6); 310 311 printk(" [%d] 0x%02x |", i, usp->usp_module_type[i]); 312 comedi_udelay(1); 313 } 314 315 printk("\n"); 316 317 /* initial subdevice for digital or analog i/o */ 318 subdev->type = COMEDI_SUBD_DIO; 319 subdev->private = usp; 320 subdev->subdev_flags = SDF_READABLE | SDF_WRITABLE; 321 subdev->n_chan = UNIOXX5_NUM_OF_CHANS; 322 subdev->maxdata = 0xFFF; 323 subdev->range_table = &range_digital; 324 subdev->insn_read = unioxx5_subdev_read; 325 subdev->insn_write = unioxx5_subdev_write; 326 subdev->insn_config = unioxx5_insn_config; /* for digital modules only!!! */ 327 328 printk("subdevice configured\n"); 329 330 return 0; 331} 332 333static int __unioxx5_digital_write(struct unioxx5_subd_priv *usp, unsigned int *data, 334 int channel, int minor) 335{ 336 int channel_offset, val; 337 int mask = 1 << (channel & 0x07); 338 339 if ((channel_offset = __unioxx5_define_chan_offset(channel)) < 0) { 340 printk(KERN_ERR 341 "comedi%d: undefined channel %d. channel range is 0 .. 23\n", 342 minor, channel); 343 return 0; 344 } 345 346 val = usp->usp_prev_wr_val[channel_offset - 1]; /* getting previous written value */ 347 348 if (*data) 349 val |= mask; 350 else 351 val &= ~mask; 352 353 outb(val, usp->usp_iobase + channel_offset); 354 usp->usp_prev_wr_val[channel_offset - 1] = val; /* saving new written value */ 355 356 return 1; 357} 358 359/* function for digital reading */ 360static int __unioxx5_digital_read(struct unioxx5_subd_priv *usp, unsigned int *data, 361 int channel, int minor) 362{ 363 int channel_offset, mask = 1 << (channel & 0x07); 364 365 if ((channel_offset = __unioxx5_define_chan_offset(channel)) < 0) { 366 printk(KERN_ERR 367 "comedi%d: undefined channel %d. channel range is 0 .. 23\n", 368 minor, channel); 369 return 0; 370 } 371 372 *data = inb(usp->usp_iobase + channel_offset); 373 *data &= mask; 374 375 if (channel_offset > 1) 376 channel -= 2 << channel_offset; /* this operation is created for correct readed value to 0 or 1 */ 377 378 *data >>= channel; 379 return 1; 380} 381 382#if 0 /* not used? */ 383static void __unioxx5_digital_config(struct unioxx5_subd_priv *usp, int mode) 384{ 385 int i, mask; 386 387 mask = (mode == ALL_2_OUTPUT) ? 0xFF : 0x00; 388 printk("COMEDI: mode = %d\n", mask); 389 390 outb(1, usp->usp_iobase + 0); 391 392 for (i = 0; i < 3; i++) 393 outb(mask, usp->usp_iobase + i); 394 395 outb(0, usp->usp_iobase + 0); 396} 397#endif 398 399static int __unioxx5_analog_write(struct unioxx5_subd_priv *usp, unsigned int *data, 400 int channel, int minor) 401{ 402 int module, i; 403 404 module = channel / 2; /* definig module number(0 .. 11) */ 405 i = (channel % 2) << 1; /* depends on type of channel (A or B) */ 406 407 /* defining if given module can work on output */ 408 if (!(usp->usp_module_type[module] & MODULE_OUTPUT_MASK)) { 409 printk(KERN_ERR 410 "comedi%d: module in position %d with id 0x%0x is for input only!\n", 411 minor, module, usp->usp_module_type[module]); 412 return 0; 413 } 414 415 __unioxx5_analog_config(usp, channel); 416 /* saving minor byte */ 417 usp->usp_extra_data[module][i++] = (unsigned char)(*data & 0x00FF); 418 /* saving major byte */ 419 usp->usp_extra_data[module][i] = (unsigned char)((*data & 0xFF00) >> 8); 420 421 /* while(!((inb(usp->usp_iobase + 0)) & TxBE)); */ 422 outb(module + 1, usp->usp_iobase + 5); /* sending module number to card(1 .. 12) */ 423 outb('W', usp->usp_iobase + 6); /* sends (W)rite command to module */ 424 425 /* sending for bytes to module(one byte per cycle iteration) */ 426 for (i = 0; i < 4; i++) { 427 while (!((inb(usp->usp_iobase + 0)) & TxBE)) ; /* waits while writting will be allowed */ 428 outb(usp->usp_extra_data[module][i], usp->usp_iobase + 6); 429 } 430 431 return 1; 432} 433 434static int __unioxx5_analog_read(struct unioxx5_subd_priv *usp, unsigned int *data, 435 int channel, int minor) 436{ 437 int module_no, read_ch; 438 char control; 439 440 module_no = channel / 2; 441 read_ch = channel % 2; /* depend on type of channel (A or B) */ 442 443 /* defining if given module can work on input */ 444 if (usp->usp_module_type[module_no] & MODULE_OUTPUT_MASK) { 445 printk(KERN_ERR 446 "comedi%d: module in position %d with id 0x%02x is for output only", 447 minor, module_no, usp->usp_module_type[module_no]); 448 return 0; 449 } 450 451 __unioxx5_analog_config(usp, channel); 452 outb(module_no + 1, usp->usp_iobase + 5); /* sends module number to card(1 .. 12) */ 453 outb('V', usp->usp_iobase + 6); /* sends to module (V)erify command */ 454 control = inb(usp->usp_iobase); /* get control register byte */ 455 456 /* waits while reading four bytes will be allowed */ 457 while (!((control = inb(usp->usp_iobase + 0)) & Rx4CA)) ; 458 459 /* if four bytes readding error occurs - return 0(false) */ 460 if ((control & Rx4CA_ERR_MASK)) { 461 printk("COMEDI: 4 bytes error\n"); 462 return 0; 463 } 464 465 if (read_ch) 466 *data = inw(usp->usp_iobase + 6); /* channel B */ 467 else 468 *data = inw(usp->usp_iobase + 4); /* channel A */ 469 470 return 1; 471} 472 473/* configure channels for analog i/o (even to output, odd to input) */ 474static void __unioxx5_analog_config(struct unioxx5_subd_priv *usp, int channel) 475{ 476 int chan_a, chan_b, conf, channel_offset; 477 478 channel_offset = __unioxx5_define_chan_offset(channel); 479 conf = usp->usp_prev_cn_val[channel_offset - 1]; 480 chan_a = chan_b = 1; 481 482 /* setting channel A and channel B mask */ 483 if (channel % 2 == 0) { 484 chan_a <<= channel & 0x07; 485 chan_b <<= (channel + 1) & 0x07; 486 } else { 487 chan_a <<= (channel - 1) & 0x07; 488 chan_b <<= channel & 0x07; 489 } 490 491 conf |= chan_a; /* even channel ot output */ 492 conf &= ~chan_b; /* odd channel to input */ 493 494 outb(1, usp->usp_iobase + 0); 495 outb(conf, usp->usp_iobase + channel_offset); 496 outb(0, usp->usp_iobase + 0); 497 498 usp->usp_prev_cn_val[channel_offset - 1] = conf; 499} 500 501/* *\ 502 * this function defines if the given channel number * 503 * enters in default numeric interspace(from 0 to 23) * 504 * and it returns address offset for usage needed * 505 * channel. * 506\* */ 507 508static int __unioxx5_define_chan_offset(int chan_num) 509{ 510 511 if (chan_num < 0 || chan_num > 23) 512 return -1; 513 514 return (chan_num >> 3) + 1; 515} 516