ni_labpc.c revision c19cc78efe922e86da7ba694dbfc4be066dd7eb4
1/* 2 comedi/drivers/ni_labpc.c 3 Driver for National Instruments Lab-PC series boards and compatibles 4 Copyright (C) 2001, 2002, 2003 Frank Mori Hess <fmhess@users.sourceforge.net> 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 19 20************************************************************************ 21*/ 22/* 23Driver: ni_labpc 24Description: National Instruments Lab-PC (& compatibles) 25Author: Frank Mori Hess <fmhess@users.sourceforge.net> 26Devices: [National Instruments] Lab-PC-1200 (labpc-1200), 27 Lab-PC-1200AI (labpc-1200ai), Lab-PC+ (lab-pc+), PCI-1200 (ni_labpc) 28Status: works 29 30Tested with lab-pc-1200. For the older Lab-PC+, not all input ranges 31and analog references will work, the available ranges/arefs will 32depend on how you have configured the jumpers on your board 33(see your owner's manual). 34 35Kernel-level ISA plug-and-play support for the lab-pc-1200 36boards has not 37yet been added to the driver, mainly due to the fact that 38I don't know the device id numbers. If you have one 39of these boards, 40please file a bug report at http://comedi.org/ 41so I can get the necessary information from you. 42 43The 1200 series boards have onboard calibration dacs for correcting 44analog input/output offsets and gains. The proper settings for these 45caldacs are stored on the board's eeprom. To read the caldac values 46from the eeprom and store them into a file that can be then be used by 47comedilib, use the comedi_calibrate program. 48 49Configuration options - ISA boards: 50 [0] - I/O port base address 51 [1] - IRQ (optional, required for timed or externally triggered conversions) 52 [2] - DMA channel (optional) 53 54Configuration options - PCI boards: 55 [0] - bus (optional) 56 [1] - slot (optional) 57 58The Lab-pc+ has quirky chanlist requirements 59when scanning multiple channels. Multiple channel scan 60sequence must start at highest channel, then decrement down to 61channel 0. The rest of the cards can scan down like lab-pc+ or scan 62up from channel zero. Chanlists consisting of all one channel 63are also legal, and allow you to pace conversions in bursts. 64 65*/ 66 67/* 68 69NI manuals: 70341309a (labpc-1200 register manual) 71340914a (pci-1200) 72320502b (lab-pc+) 73 74*/ 75 76#undef LABPC_DEBUG 77/* #define LABPC_DEBUG enable debugging messages */ 78 79#include <linux/interrupt.h> 80#include <linux/slab.h> 81#include <linux/io.h> 82#include "../comedidev.h" 83 84#include <linux/delay.h> 85#include <asm/dma.h> 86 87#include "8253.h" 88#include "8255.h" 89#include "mite.h" 90#include "comedi_fc.h" 91#include "ni_labpc.h" 92 93#define DRV_NAME "ni_labpc" 94 95/* size of io region used by board */ 96#define LABPC_SIZE 32 97/* 2 MHz master clock */ 98#define LABPC_TIMER_BASE 500 99 100/* Registers for the lab-pc+ */ 101 102/* write-only registers */ 103#define COMMAND1_REG 0x0 104#define ADC_GAIN_MASK (0x7 << 4) 105#define ADC_CHAN_BITS(x) ((x) & 0x7) 106/* enables multi channel scans */ 107#define ADC_SCAN_EN_BIT 0x80 108#define COMMAND2_REG 0x1 109/* enable pretriggering (used in conjunction with SWTRIG) */ 110#define PRETRIG_BIT 0x1 111/* enable paced conversions on external trigger */ 112#define HWTRIG_BIT 0x2 113/* enable paced conversions */ 114#define SWTRIG_BIT 0x4 115/* use two cascaded counters for pacing */ 116#define CASCADE_BIT 0x8 117#define DAC_PACED_BIT(channel) (0x40 << ((channel) & 0x1)) 118#define COMMAND3_REG 0x2 119/* enable dma transfers */ 120#define DMA_EN_BIT 0x1 121/* enable interrupts for 8255 */ 122#define DIO_INTR_EN_BIT 0x2 123/* enable dma terminal count interrupt */ 124#define DMATC_INTR_EN_BIT 0x4 125/* enable timer interrupt */ 126#define TIMER_INTR_EN_BIT 0x8 127/* enable error interrupt */ 128#define ERR_INTR_EN_BIT 0x10 129/* enable fifo not empty interrupt */ 130#define ADC_FNE_INTR_EN_BIT 0x20 131#define ADC_CONVERT_REG 0x3 132#define DAC_LSB_REG(channel) (0x4 + 2 * ((channel) & 0x1)) 133#define DAC_MSB_REG(channel) (0x5 + 2 * ((channel) & 0x1)) 134#define ADC_CLEAR_REG 0x8 135#define DMATC_CLEAR_REG 0xa 136#define TIMER_CLEAR_REG 0xc 137/* 1200 boards only */ 138#define COMMAND6_REG 0xe 139/* select ground or common-mode reference */ 140#define ADC_COMMON_BIT 0x1 141/* adc unipolar */ 142#define ADC_UNIP_BIT 0x2 143/* dac unipolar */ 144#define DAC_UNIP_BIT(channel) (0x4 << ((channel) & 0x1)) 145/* enable fifo half full interrupt */ 146#define ADC_FHF_INTR_EN_BIT 0x20 147/* enable interrupt on end of hardware count */ 148#define A1_INTR_EN_BIT 0x40 149/* scan up from channel zero instead of down to zero */ 150#define ADC_SCAN_UP_BIT 0x80 151#define COMMAND4_REG 0xf 152/* enables 'interval' scanning */ 153#define INTERVAL_SCAN_EN_BIT 0x1 154/* enables external signal on counter b1 output to trigger scan */ 155#define EXT_SCAN_EN_BIT 0x2 156/* chooses direction (output or input) for EXTCONV* line */ 157#define EXT_CONVERT_OUT_BIT 0x4 158/* chooses differential inputs for adc (in conjunction with board jumper) */ 159#define ADC_DIFF_BIT 0x8 160#define EXT_CONVERT_DISABLE_BIT 0x10 161/* 1200 boards only, calibration stuff */ 162#define COMMAND5_REG 0x1c 163/* enable eeprom for write */ 164#define EEPROM_WRITE_UNPROTECT_BIT 0x4 165/* enable dithering */ 166#define DITHER_EN_BIT 0x8 167/* load calibration dac */ 168#define CALDAC_LOAD_BIT 0x10 169/* serial clock - rising edge writes, falling edge reads */ 170#define SCLOCK_BIT 0x20 171/* serial data bit for writing to eeprom or calibration dacs */ 172#define SDATA_BIT 0x40 173/* enable eeprom for read/write */ 174#define EEPROM_EN_BIT 0x80 175#define INTERVAL_COUNT_REG 0x1e 176#define INTERVAL_LOAD_REG 0x1f 177#define INTERVAL_LOAD_BITS 0x1 178 179/* read-only registers */ 180#define STATUS1_REG 0x0 181/* data is available in fifo */ 182#define DATA_AVAIL_BIT 0x1 183/* overrun has occurred */ 184#define OVERRUN_BIT 0x2 185/* fifo overflow */ 186#define OVERFLOW_BIT 0x4 187/* timer interrupt has occurred */ 188#define TIMER_BIT 0x8 189/* dma terminal count has occurred */ 190#define DMATC_BIT 0x10 191/* external trigger has occurred */ 192#define EXT_TRIG_BIT 0x40 193/* 1200 boards only */ 194#define STATUS2_REG 0x1d 195/* programmable eeprom serial output */ 196#define EEPROM_OUT_BIT 0x1 197/* counter A1 terminal count */ 198#define A1_TC_BIT 0x2 199/* fifo not half full */ 200#define FNHF_BIT 0x4 201#define ADC_FIFO_REG 0xa 202 203#define DIO_BASE_REG 0x10 204#define COUNTER_A_BASE_REG 0x14 205#define COUNTER_A_CONTROL_REG (COUNTER_A_BASE_REG + 0x3) 206/* check modes put conversion pacer output in harmless state (a0 mode 2) */ 207#define INIT_A0_BITS 0x14 208/* put hardware conversion counter output in harmless state (a1 mode 0) */ 209#define INIT_A1_BITS 0x70 210#define COUNTER_B_BASE_REG 0x18 211 212static int labpc_attach(struct comedi_device *dev, struct comedi_devconfig *it); 213static int labpc_cancel(struct comedi_device *dev, struct comedi_subdevice *s); 214static irqreturn_t labpc_interrupt(int irq, void *d); 215static int labpc_drain_fifo(struct comedi_device *dev); 216#ifdef CONFIG_ISA_DMA_API 217static void labpc_drain_dma(struct comedi_device *dev); 218static void handle_isa_dma(struct comedi_device *dev); 219#endif 220static void labpc_drain_dregs(struct comedi_device *dev); 221static int labpc_ai_cmdtest(struct comedi_device *dev, 222 struct comedi_subdevice *s, struct comedi_cmd *cmd); 223static int labpc_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s); 224static int labpc_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s, 225 struct comedi_insn *insn, unsigned int *data); 226static int labpc_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s, 227 struct comedi_insn *insn, unsigned int *data); 228static int labpc_ao_rinsn(struct comedi_device *dev, struct comedi_subdevice *s, 229 struct comedi_insn *insn, unsigned int *data); 230static int labpc_calib_read_insn(struct comedi_device *dev, 231 struct comedi_subdevice *s, 232 struct comedi_insn *insn, unsigned int *data); 233static int labpc_calib_write_insn(struct comedi_device *dev, 234 struct comedi_subdevice *s, 235 struct comedi_insn *insn, unsigned int *data); 236static int labpc_eeprom_read_insn(struct comedi_device *dev, 237 struct comedi_subdevice *s, 238 struct comedi_insn *insn, unsigned int *data); 239static int labpc_eeprom_write_insn(struct comedi_device *dev, 240 struct comedi_subdevice *s, 241 struct comedi_insn *insn, 242 unsigned int *data); 243static void labpc_adc_timing(struct comedi_device *dev, struct comedi_cmd *cmd); 244#ifdef CONFIG_ISA_DMA_API 245static unsigned int labpc_suggest_transfer_size(struct comedi_cmd cmd); 246#endif 247#ifdef CONFIG_COMEDI_PCI 248static int labpc_find_device(struct comedi_device *dev, int bus, int slot); 249#endif 250static int labpc_dio_mem_callback(int dir, int port, int data, 251 unsigned long arg); 252static void labpc_serial_out(struct comedi_device *dev, unsigned int value, 253 unsigned int num_bits); 254static unsigned int labpc_serial_in(struct comedi_device *dev); 255static unsigned int labpc_eeprom_read(struct comedi_device *dev, 256 unsigned int address); 257static unsigned int labpc_eeprom_read_status(struct comedi_device *dev); 258static int labpc_eeprom_write(struct comedi_device *dev, 259 unsigned int address, 260 unsigned int value); 261static void write_caldac(struct comedi_device *dev, unsigned int channel, 262 unsigned int value); 263 264enum scan_mode { 265 MODE_SINGLE_CHAN, 266 MODE_SINGLE_CHAN_INTERVAL, 267 MODE_MULT_CHAN_UP, 268 MODE_MULT_CHAN_DOWN, 269}; 270 271/* analog input ranges */ 272#define NUM_LABPC_PLUS_AI_RANGES 16 273/* indicates unipolar ranges */ 274static const int labpc_plus_is_unipolar[NUM_LABPC_PLUS_AI_RANGES] = { 275 0, 276 0, 277 0, 278 0, 279 0, 280 0, 281 0, 282 0, 283 1, 284 1, 285 1, 286 1, 287 1, 288 1, 289 1, 290 1, 291}; 292 293/* map range index to gain bits */ 294static const int labpc_plus_ai_gain_bits[NUM_LABPC_PLUS_AI_RANGES] = { 295 0x00, 296 0x10, 297 0x20, 298 0x30, 299 0x40, 300 0x50, 301 0x60, 302 0x70, 303 0x00, 304 0x10, 305 0x20, 306 0x30, 307 0x40, 308 0x50, 309 0x60, 310 0x70, 311}; 312 313static const struct comedi_lrange range_labpc_plus_ai = { 314 NUM_LABPC_PLUS_AI_RANGES, 315 { 316 BIP_RANGE(5), 317 BIP_RANGE(4), 318 BIP_RANGE(2.5), 319 BIP_RANGE(1), 320 BIP_RANGE(0.5), 321 BIP_RANGE(0.25), 322 BIP_RANGE(0.1), 323 BIP_RANGE(0.05), 324 UNI_RANGE(10), 325 UNI_RANGE(8), 326 UNI_RANGE(5), 327 UNI_RANGE(2), 328 UNI_RANGE(1), 329 UNI_RANGE(0.5), 330 UNI_RANGE(0.2), 331 UNI_RANGE(0.1), 332 } 333}; 334 335#define NUM_LABPC_1200_AI_RANGES 14 336/* indicates unipolar ranges */ 337const int labpc_1200_is_unipolar[NUM_LABPC_1200_AI_RANGES] = { 338 0, 339 0, 340 0, 341 0, 342 0, 343 0, 344 0, 345 1, 346 1, 347 1, 348 1, 349 1, 350 1, 351 1, 352}; 353EXPORT_SYMBOL_GPL(labpc_1200_is_unipolar); 354 355/* map range index to gain bits */ 356const int labpc_1200_ai_gain_bits[NUM_LABPC_1200_AI_RANGES] = { 357 0x00, 358 0x20, 359 0x30, 360 0x40, 361 0x50, 362 0x60, 363 0x70, 364 0x00, 365 0x20, 366 0x30, 367 0x40, 368 0x50, 369 0x60, 370 0x70, 371}; 372EXPORT_SYMBOL_GPL(labpc_1200_ai_gain_bits); 373 374const struct comedi_lrange range_labpc_1200_ai = { 375 NUM_LABPC_1200_AI_RANGES, 376 { 377 BIP_RANGE(5), 378 BIP_RANGE(2.5), 379 BIP_RANGE(1), 380 BIP_RANGE(0.5), 381 BIP_RANGE(0.25), 382 BIP_RANGE(0.1), 383 BIP_RANGE(0.05), 384 UNI_RANGE(10), 385 UNI_RANGE(5), 386 UNI_RANGE(2), 387 UNI_RANGE(1), 388 UNI_RANGE(0.5), 389 UNI_RANGE(0.2), 390 UNI_RANGE(0.1), 391 } 392}; 393EXPORT_SYMBOL_GPL(range_labpc_1200_ai); 394 395/* analog output ranges */ 396#define AO_RANGE_IS_UNIPOLAR 0x1 397static const struct comedi_lrange range_labpc_ao = { 398 2, 399 { 400 BIP_RANGE(5), 401 UNI_RANGE(10), 402 } 403}; 404 405/* functions that do inb/outb and readb/writeb so we can use 406 * function pointers to decide which to use */ 407static inline unsigned int labpc_inb(unsigned long address) 408{ 409 return inb(address); 410} 411 412static inline void labpc_outb(unsigned int byte, unsigned long address) 413{ 414 outb(byte, address); 415} 416 417static inline unsigned int labpc_readb(unsigned long address) 418{ 419 return readb((void *)address); 420} 421 422static inline void labpc_writeb(unsigned int byte, unsigned long address) 423{ 424 writeb(byte, (void *)address); 425} 426 427static const struct labpc_board_struct labpc_boards[] = { 428 { 429 .name = "lab-pc-1200", 430 .ai_speed = 10000, 431 .bustype = isa_bustype, 432 .register_layout = labpc_1200_layout, 433 .has_ao = 1, 434 .ai_range_table = &range_labpc_1200_ai, 435 .ai_range_code = labpc_1200_ai_gain_bits, 436 .ai_range_is_unipolar = labpc_1200_is_unipolar, 437 .ai_scan_up = 1, 438 .memory_mapped_io = 0, 439 }, 440 { 441 .name = "lab-pc-1200ai", 442 .ai_speed = 10000, 443 .bustype = isa_bustype, 444 .register_layout = labpc_1200_layout, 445 .has_ao = 0, 446 .ai_range_table = &range_labpc_1200_ai, 447 .ai_range_code = labpc_1200_ai_gain_bits, 448 .ai_range_is_unipolar = labpc_1200_is_unipolar, 449 .ai_scan_up = 1, 450 .memory_mapped_io = 0, 451 }, 452 { 453 .name = "lab-pc+", 454 .ai_speed = 12000, 455 .bustype = isa_bustype, 456 .register_layout = labpc_plus_layout, 457 .has_ao = 1, 458 .ai_range_table = &range_labpc_plus_ai, 459 .ai_range_code = labpc_plus_ai_gain_bits, 460 .ai_range_is_unipolar = labpc_plus_is_unipolar, 461 .ai_scan_up = 0, 462 .memory_mapped_io = 0, 463 }, 464#ifdef CONFIG_COMEDI_PCI 465 { 466 .name = "pci-1200", 467 .device_id = 0x161, 468 .ai_speed = 10000, 469 .bustype = pci_bustype, 470 .register_layout = labpc_1200_layout, 471 .has_ao = 1, 472 .ai_range_table = &range_labpc_1200_ai, 473 .ai_range_code = labpc_1200_ai_gain_bits, 474 .ai_range_is_unipolar = labpc_1200_is_unipolar, 475 .ai_scan_up = 1, 476 .memory_mapped_io = 1, 477 }, 478/* dummy entry so pci board works when comedi_config is passed driver name */ 479 { 480 .name = DRV_NAME, 481 .bustype = pci_bustype, 482 }, 483#endif 484}; 485 486/* 487 * Useful for shorthand access to the particular board structure 488 */ 489#define thisboard ((struct labpc_board_struct *)dev->board_ptr) 490 491/* size in bytes of dma buffer */ 492static const int dma_buffer_size = 0xff00; 493/* 2 bytes per sample */ 494static const int sample_size = 2; 495 496#define devpriv ((struct labpc_private *)dev->private) 497 498static struct comedi_driver driver_labpc = { 499 .driver_name = DRV_NAME, 500 .module = THIS_MODULE, 501 .attach = labpc_attach, 502 .detach = labpc_common_detach, 503 .num_names = ARRAY_SIZE(labpc_boards), 504 .board_name = &labpc_boards[0].name, 505 .offset = sizeof(struct labpc_board_struct), 506}; 507 508#ifdef CONFIG_COMEDI_PCI 509static DEFINE_PCI_DEVICE_TABLE(labpc_pci_table) = { 510 {PCI_DEVICE(PCI_VENDOR_ID_NI, 0x161)}, 511 {0} 512}; 513 514MODULE_DEVICE_TABLE(pci, labpc_pci_table); 515#endif /* CONFIG_COMEDI_PCI */ 516 517static inline int labpc_counter_load(struct comedi_device *dev, 518 unsigned long base_address, 519 unsigned int counter_number, 520 unsigned int count, unsigned int mode) 521{ 522 if (thisboard->memory_mapped_io) 523 return i8254_mm_load((void *)base_address, 0, counter_number, 524 count, mode); 525 else 526 return i8254_load(base_address, 0, counter_number, count, mode); 527} 528 529int labpc_common_attach(struct comedi_device *dev, unsigned long iobase, 530 unsigned int irq, unsigned int dma_chan) 531{ 532 struct comedi_subdevice *s; 533 int i; 534 unsigned long isr_flags; 535#ifdef CONFIG_ISA_DMA_API 536 unsigned long dma_flags; 537#endif 538 short lsb, msb; 539 540 printk(KERN_ERR "comedi%d: ni_labpc: %s, io 0x%lx", dev->minor, 541 thisboard->name, 542 iobase); 543 if (irq) 544 printk(", irq %u", irq); 545 if (dma_chan) 546 printk(", dma %u", dma_chan); 547 printk("\n"); 548 549 if (iobase == 0) { 550 printk(KERN_ERR "io base address is zero!\n"); 551 return -EINVAL; 552 } 553 /* request io regions for isa boards */ 554 if (thisboard->bustype == isa_bustype) { 555 /* check if io addresses are available */ 556 if (!request_region(iobase, LABPC_SIZE, 557 driver_labpc.driver_name)) { 558 printk(KERN_ERR "I/O port conflict\n"); 559 return -EIO; 560 } 561 } 562 dev->iobase = iobase; 563 564 if (thisboard->memory_mapped_io) { 565 devpriv->read_byte = labpc_readb; 566 devpriv->write_byte = labpc_writeb; 567 } else { 568 devpriv->read_byte = labpc_inb; 569 devpriv->write_byte = labpc_outb; 570 } 571 /* initialize board's command registers */ 572 devpriv->write_byte(devpriv->command1_bits, dev->iobase + COMMAND1_REG); 573 devpriv->write_byte(devpriv->command2_bits, dev->iobase + COMMAND2_REG); 574 devpriv->write_byte(devpriv->command3_bits, dev->iobase + COMMAND3_REG); 575 devpriv->write_byte(devpriv->command4_bits, dev->iobase + COMMAND4_REG); 576 if (thisboard->register_layout == labpc_1200_layout) { 577 devpriv->write_byte(devpriv->command5_bits, 578 dev->iobase + COMMAND5_REG); 579 devpriv->write_byte(devpriv->command6_bits, 580 dev->iobase + COMMAND6_REG); 581 } 582 583 /* grab our IRQ */ 584 if (irq) { 585 isr_flags = 0; 586 if (thisboard->bustype == pci_bustype 587 || thisboard->bustype == pcmcia_bustype) 588 isr_flags |= IRQF_SHARED; 589 if (request_irq(irq, labpc_interrupt, isr_flags, 590 driver_labpc.driver_name, dev)) { 591 printk(KERN_ERR "unable to allocate irq %u\n", irq); 592 return -EINVAL; 593 } 594 } 595 dev->irq = irq; 596 597#ifdef CONFIG_ISA_DMA_API 598 /* grab dma channel */ 599 if (dma_chan > 3) { 600 printk(KERN_ERR " invalid dma channel %u\n", dma_chan); 601 return -EINVAL; 602 } else if (dma_chan) { 603 /* allocate dma buffer */ 604 devpriv->dma_buffer = 605 kmalloc(dma_buffer_size, GFP_KERNEL | GFP_DMA); 606 if (devpriv->dma_buffer == NULL) { 607 printk(KERN_ERR " failed to allocate dma buffer\n"); 608 return -ENOMEM; 609 } 610 if (request_dma(dma_chan, driver_labpc.driver_name)) { 611 printk(KERN_ERR " failed to allocate dma channel %u\n", 612 dma_chan); 613 return -EINVAL; 614 } 615 devpriv->dma_chan = dma_chan; 616 dma_flags = claim_dma_lock(); 617 disable_dma(devpriv->dma_chan); 618 set_dma_mode(devpriv->dma_chan, DMA_MODE_READ); 619 release_dma_lock(dma_flags); 620 } 621#endif 622 623 dev->board_name = thisboard->name; 624 625 if (alloc_subdevices(dev, 5) < 0) 626 return -ENOMEM; 627 628 /* analog input subdevice */ 629 s = dev->subdevices + 0; 630 dev->read_subdev = s; 631 s->type = COMEDI_SUBD_AI; 632 s->subdev_flags = 633 SDF_READABLE | SDF_GROUND | SDF_COMMON | SDF_DIFF | SDF_CMD_READ; 634 s->n_chan = 8; 635 s->len_chanlist = 8; 636 s->maxdata = (1 << 12) - 1; /* 12 bit resolution */ 637 s->range_table = thisboard->ai_range_table; 638 s->do_cmd = labpc_ai_cmd; 639 s->do_cmdtest = labpc_ai_cmdtest; 640 s->insn_read = labpc_ai_rinsn; 641 s->cancel = labpc_cancel; 642 643 /* analog output */ 644 s = dev->subdevices + 1; 645 if (thisboard->has_ao) { 646 /* 647 * Could provide command support, except it only has a 648 * one sample hardware buffer for analog output and no 649 * underrun flag. 650 */ 651 s->type = COMEDI_SUBD_AO; 652 s->subdev_flags = SDF_READABLE | SDF_WRITABLE | SDF_GROUND; 653 s->n_chan = NUM_AO_CHAN; 654 s->maxdata = (1 << 12) - 1; /* 12 bit resolution */ 655 s->range_table = &range_labpc_ao; 656 s->insn_read = labpc_ao_rinsn; 657 s->insn_write = labpc_ao_winsn; 658 /* initialize analog outputs to a known value */ 659 for (i = 0; i < s->n_chan; i++) { 660 devpriv->ao_value[i] = s->maxdata / 2; 661 lsb = devpriv->ao_value[i] & 0xff; 662 msb = (devpriv->ao_value[i] >> 8) & 0xff; 663 devpriv->write_byte(lsb, dev->iobase + DAC_LSB_REG(i)); 664 devpriv->write_byte(msb, dev->iobase + DAC_MSB_REG(i)); 665 } 666 } else { 667 s->type = COMEDI_SUBD_UNUSED; 668 } 669 670 /* 8255 dio */ 671 s = dev->subdevices + 2; 672 /* if board uses io memory we have to give a custom callback 673 * function to the 8255 driver */ 674 if (thisboard->memory_mapped_io) 675 subdev_8255_init(dev, s, labpc_dio_mem_callback, 676 (unsigned long)(dev->iobase + DIO_BASE_REG)); 677 else 678 subdev_8255_init(dev, s, NULL, dev->iobase + DIO_BASE_REG); 679 680 /* calibration subdevices for boards that have one */ 681 s = dev->subdevices + 3; 682 if (thisboard->register_layout == labpc_1200_layout) { 683 s->type = COMEDI_SUBD_CALIB; 684 s->subdev_flags = SDF_READABLE | SDF_WRITABLE | SDF_INTERNAL; 685 s->n_chan = 16; 686 s->maxdata = 0xff; 687 s->insn_read = labpc_calib_read_insn; 688 s->insn_write = labpc_calib_write_insn; 689 690 for (i = 0; i < s->n_chan; i++) 691 write_caldac(dev, i, s->maxdata / 2); 692 } else 693 s->type = COMEDI_SUBD_UNUSED; 694 695 /* EEPROM */ 696 s = dev->subdevices + 4; 697 if (thisboard->register_layout == labpc_1200_layout) { 698 s->type = COMEDI_SUBD_MEMORY; 699 s->subdev_flags = SDF_READABLE | SDF_WRITABLE | SDF_INTERNAL; 700 s->n_chan = EEPROM_SIZE; 701 s->maxdata = 0xff; 702 s->insn_read = labpc_eeprom_read_insn; 703 s->insn_write = labpc_eeprom_write_insn; 704 705 for (i = 0; i < EEPROM_SIZE; i++) 706 devpriv->eeprom_data[i] = labpc_eeprom_read(dev, i); 707#ifdef LABPC_DEBUG 708 printk(KERN_ERR " eeprom:"); 709 for (i = 0; i < EEPROM_SIZE; i++) 710 printk(" %i:0x%x ", i, devpriv->eeprom_data[i]); 711 printk("\n"); 712#endif 713 } else 714 s->type = COMEDI_SUBD_UNUSED; 715 716 return 0; 717} 718EXPORT_SYMBOL_GPL(labpc_common_attach); 719 720static int labpc_attach(struct comedi_device *dev, struct comedi_devconfig *it) 721{ 722 unsigned long iobase = 0; 723 unsigned int irq = 0; 724 unsigned int dma_chan = 0; 725#ifdef CONFIG_COMEDI_PCI 726 int retval; 727#endif 728 729 /* allocate and initialize dev->private */ 730 if (alloc_private(dev, sizeof(struct labpc_private)) < 0) 731 return -ENOMEM; 732 733 /* get base address, irq etc. based on bustype */ 734 switch (thisboard->bustype) { 735 case isa_bustype: 736#ifdef CONFIG_ISA_DMA_API 737 iobase = it->options[0]; 738 irq = it->options[1]; 739 dma_chan = it->options[2]; 740#else 741 printk(KERN_ERR " this driver has not been built with ISA DMA " 742 "support.\n"); 743 return -EINVAL; 744#endif 745 break; 746 case pci_bustype: 747#ifdef CONFIG_COMEDI_PCI 748 retval = labpc_find_device(dev, it->options[0], it->options[1]); 749 if (retval < 0) 750 return retval; 751 retval = mite_setup(devpriv->mite); 752 if (retval < 0) 753 return retval; 754 iobase = (unsigned long)devpriv->mite->daq_io_addr; 755 irq = mite_irq(devpriv->mite); 756#else 757 printk(KERN_ERR " this driver has not been built with PCI " 758 "support.\n"); 759 return -EINVAL; 760#endif 761 break; 762 case pcmcia_bustype: 763 printk 764 (" this driver does not support pcmcia cards, use ni_labpc_cs.o\n"); 765 return -EINVAL; 766 break; 767 default: 768 printk(KERN_ERR "bug! couldn't determine board type\n"); 769 return -EINVAL; 770 break; 771 } 772 773 return labpc_common_attach(dev, iobase, irq, dma_chan); 774} 775 776/* adapted from ni_pcimio for finding mite based boards (pc-1200) */ 777#ifdef CONFIG_COMEDI_PCI 778static int labpc_find_device(struct comedi_device *dev, int bus, int slot) 779{ 780 struct mite_struct *mite; 781 int i; 782 for (mite = mite_devices; mite; mite = mite->next) { 783 if (mite->used) 784 continue; 785/* if bus/slot are specified then make sure we have the right bus/slot */ 786 if (bus || slot) { 787 if (bus != mite->pcidev->bus->number 788 || slot != PCI_SLOT(mite->pcidev->devfn)) 789 continue; 790 } 791 for (i = 0; i < driver_labpc.num_names; i++) { 792 if (labpc_boards[i].bustype != pci_bustype) 793 continue; 794 if (mite_device_id(mite) == labpc_boards[i].device_id) { 795 devpriv->mite = mite; 796/* fixup board pointer, in case we were using the dummy "ni_labpc" entry */ 797 dev->board_ptr = &labpc_boards[i]; 798 return 0; 799 } 800 } 801 } 802 printk(KERN_ERR "no device found\n"); 803 mite_list_devices(); 804 return -EIO; 805} 806#endif 807 808int labpc_common_detach(struct comedi_device *dev) 809{ 810 printk(KERN_ERR "comedi%d: ni_labpc: detach\n", dev->minor); 811 812 if (dev->subdevices) 813 subdev_8255_cleanup(dev, dev->subdevices + 2); 814 815#ifdef CONFIG_ISA_DMA_API 816 /* only free stuff if it has been allocated by _attach */ 817 kfree(devpriv->dma_buffer); 818 if (devpriv->dma_chan) 819 free_dma(devpriv->dma_chan); 820#endif 821 if (dev->irq) 822 free_irq(dev->irq, dev); 823 if (thisboard->bustype == isa_bustype && dev->iobase) 824 release_region(dev->iobase, LABPC_SIZE); 825#ifdef CONFIG_COMEDI_PCI 826 if (devpriv->mite) 827 mite_unsetup(devpriv->mite); 828#endif 829 830 return 0; 831}; 832EXPORT_SYMBOL_GPL(labpc_common_detach); 833 834static void labpc_clear_adc_fifo(const struct comedi_device *dev) 835{ 836 devpriv->write_byte(0x1, dev->iobase + ADC_CLEAR_REG); 837 devpriv->read_byte(dev->iobase + ADC_FIFO_REG); 838 devpriv->read_byte(dev->iobase + ADC_FIFO_REG); 839} 840 841static int labpc_cancel(struct comedi_device *dev, struct comedi_subdevice *s) 842{ 843 unsigned long flags; 844 845 spin_lock_irqsave(&dev->spinlock, flags); 846 devpriv->command2_bits &= ~SWTRIG_BIT & ~HWTRIG_BIT & ~PRETRIG_BIT; 847 devpriv->write_byte(devpriv->command2_bits, dev->iobase + COMMAND2_REG); 848 spin_unlock_irqrestore(&dev->spinlock, flags); 849 850 devpriv->command3_bits = 0; 851 devpriv->write_byte(devpriv->command3_bits, dev->iobase + COMMAND3_REG); 852 853 return 0; 854} 855 856static enum scan_mode labpc_ai_scan_mode(const struct comedi_cmd *cmd) 857{ 858 if (cmd->chanlist_len == 1) 859 return MODE_SINGLE_CHAN; 860 861 /* chanlist may be NULL during cmdtest. */ 862 if (cmd->chanlist == NULL) 863 return MODE_MULT_CHAN_UP; 864 865 if (CR_CHAN(cmd->chanlist[0]) == CR_CHAN(cmd->chanlist[1])) 866 return MODE_SINGLE_CHAN_INTERVAL; 867 868 if (CR_CHAN(cmd->chanlist[0]) < CR_CHAN(cmd->chanlist[1])) 869 return MODE_MULT_CHAN_UP; 870 871 if (CR_CHAN(cmd->chanlist[0]) > CR_CHAN(cmd->chanlist[1])) 872 return MODE_MULT_CHAN_DOWN; 873 874 printk(KERN_ERR "ni_labpc: bug! this should never happen\n"); 875 876 return 0; 877} 878 879static int labpc_ai_chanlist_invalid(const struct comedi_device *dev, 880 const struct comedi_cmd *cmd) 881{ 882 int mode, channel, range, aref, i; 883 884 if (cmd->chanlist == NULL) 885 return 0; 886 887 mode = labpc_ai_scan_mode(cmd); 888 889 if (mode == MODE_SINGLE_CHAN) 890 return 0; 891 892 if (mode == MODE_SINGLE_CHAN_INTERVAL) { 893 if (cmd->chanlist_len > 0xff) { 894 comedi_error(dev, 895 "ni_labpc: chanlist too long for single channel interval mode\n"); 896 return 1; 897 } 898 } 899 900 channel = CR_CHAN(cmd->chanlist[0]); 901 range = CR_RANGE(cmd->chanlist[0]); 902 aref = CR_AREF(cmd->chanlist[0]); 903 904 for (i = 0; i < cmd->chanlist_len; i++) { 905 906 switch (mode) { 907 case MODE_SINGLE_CHAN_INTERVAL: 908 if (CR_CHAN(cmd->chanlist[i]) != channel) { 909 comedi_error(dev, 910 "channel scanning order specified in chanlist is not supported by hardware.\n"); 911 return 1; 912 } 913 break; 914 case MODE_MULT_CHAN_UP: 915 if (CR_CHAN(cmd->chanlist[i]) != i) { 916 comedi_error(dev, 917 "channel scanning order specified in chanlist is not supported by hardware.\n"); 918 return 1; 919 } 920 break; 921 case MODE_MULT_CHAN_DOWN: 922 if (CR_CHAN(cmd->chanlist[i]) != 923 cmd->chanlist_len - i - 1) { 924 comedi_error(dev, 925 "channel scanning order specified in chanlist is not supported by hardware.\n"); 926 return 1; 927 } 928 break; 929 default: 930 printk(KERN_ERR "ni_labpc: bug! in chanlist check\n"); 931 return 1; 932 break; 933 } 934 935 if (CR_RANGE(cmd->chanlist[i]) != range) { 936 comedi_error(dev, 937 "entries in chanlist must all have the same range\n"); 938 return 1; 939 } 940 941 if (CR_AREF(cmd->chanlist[i]) != aref) { 942 comedi_error(dev, 943 "entries in chanlist must all have the same reference\n"); 944 return 1; 945 } 946 } 947 948 return 0; 949} 950 951static int labpc_use_continuous_mode(const struct comedi_cmd *cmd) 952{ 953 if (labpc_ai_scan_mode(cmd) == MODE_SINGLE_CHAN) 954 return 1; 955 956 if (cmd->scan_begin_src == TRIG_FOLLOW) 957 return 1; 958 959 return 0; 960} 961 962static unsigned int labpc_ai_convert_period(const struct comedi_cmd *cmd) 963{ 964 if (cmd->convert_src != TRIG_TIMER) 965 return 0; 966 967 if (labpc_ai_scan_mode(cmd) == MODE_SINGLE_CHAN && 968 cmd->scan_begin_src == TRIG_TIMER) 969 return cmd->scan_begin_arg; 970 971 return cmd->convert_arg; 972} 973 974static void labpc_set_ai_convert_period(struct comedi_cmd *cmd, unsigned int ns) 975{ 976 if (cmd->convert_src != TRIG_TIMER) 977 return; 978 979 if (labpc_ai_scan_mode(cmd) == MODE_SINGLE_CHAN && 980 cmd->scan_begin_src == TRIG_TIMER) { 981 cmd->scan_begin_arg = ns; 982 if (cmd->convert_arg > cmd->scan_begin_arg) 983 cmd->convert_arg = cmd->scan_begin_arg; 984 } else 985 cmd->convert_arg = ns; 986} 987 988static unsigned int labpc_ai_scan_period(const struct comedi_cmd *cmd) 989{ 990 if (cmd->scan_begin_src != TRIG_TIMER) 991 return 0; 992 993 if (labpc_ai_scan_mode(cmd) == MODE_SINGLE_CHAN && 994 cmd->convert_src == TRIG_TIMER) 995 return 0; 996 997 return cmd->scan_begin_arg; 998} 999 1000static void labpc_set_ai_scan_period(struct comedi_cmd *cmd, unsigned int ns) 1001{ 1002 if (cmd->scan_begin_src != TRIG_TIMER) 1003 return; 1004 1005 if (labpc_ai_scan_mode(cmd) == MODE_SINGLE_CHAN && 1006 cmd->convert_src == TRIG_TIMER) 1007 return; 1008 1009 cmd->scan_begin_arg = ns; 1010} 1011 1012static int labpc_ai_cmdtest(struct comedi_device *dev, 1013 struct comedi_subdevice *s, struct comedi_cmd *cmd) 1014{ 1015 int err = 0; 1016 int tmp, tmp2; 1017 int stop_mask; 1018 1019 /* step 1: make sure trigger sources are trivially valid */ 1020 1021 tmp = cmd->start_src; 1022 cmd->start_src &= TRIG_NOW | TRIG_EXT; 1023 if (!cmd->start_src || tmp != cmd->start_src) 1024 err++; 1025 1026 tmp = cmd->scan_begin_src; 1027 cmd->scan_begin_src &= TRIG_TIMER | TRIG_FOLLOW | TRIG_EXT; 1028 if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src) 1029 err++; 1030 1031 tmp = cmd->convert_src; 1032 cmd->convert_src &= TRIG_TIMER | TRIG_EXT; 1033 if (!cmd->convert_src || tmp != cmd->convert_src) 1034 err++; 1035 1036 tmp = cmd->scan_end_src; 1037 cmd->scan_end_src &= TRIG_COUNT; 1038 if (!cmd->scan_end_src || tmp != cmd->scan_end_src) 1039 err++; 1040 1041 tmp = cmd->stop_src; 1042 stop_mask = TRIG_COUNT | TRIG_NONE; 1043 if (thisboard->register_layout == labpc_1200_layout) 1044 stop_mask |= TRIG_EXT; 1045 cmd->stop_src &= stop_mask; 1046 if (!cmd->stop_src || tmp != cmd->stop_src) 1047 err++; 1048 1049 if (err) 1050 return 1; 1051 1052 /* step 2: make sure trigger sources are unique and mutually compatible */ 1053 1054 if (cmd->start_src != TRIG_NOW && cmd->start_src != TRIG_EXT) 1055 err++; 1056 if (cmd->scan_begin_src != TRIG_TIMER && 1057 cmd->scan_begin_src != TRIG_FOLLOW && 1058 cmd->scan_begin_src != TRIG_EXT) 1059 err++; 1060 if (cmd->convert_src != TRIG_TIMER && cmd->convert_src != TRIG_EXT) 1061 err++; 1062 if (cmd->stop_src != TRIG_COUNT && 1063 cmd->stop_src != TRIG_EXT && cmd->stop_src != TRIG_NONE) 1064 err++; 1065 1066 /* can't have external stop and start triggers at once */ 1067 if (cmd->start_src == TRIG_EXT && cmd->stop_src == TRIG_EXT) 1068 err++; 1069 1070 if (err) 1071 return 2; 1072 1073 /* step 3: make sure arguments are trivially compatible */ 1074 1075 if (cmd->start_arg == TRIG_NOW && cmd->start_arg != 0) { 1076 cmd->start_arg = 0; 1077 err++; 1078 } 1079 1080 if (!cmd->chanlist_len) 1081 err++; 1082 1083 if (cmd->scan_end_arg != cmd->chanlist_len) { 1084 cmd->scan_end_arg = cmd->chanlist_len; 1085 err++; 1086 } 1087 1088 if (cmd->convert_src == TRIG_TIMER) { 1089 if (cmd->convert_arg < thisboard->ai_speed) { 1090 cmd->convert_arg = thisboard->ai_speed; 1091 err++; 1092 } 1093 } 1094 /* make sure scan timing is not too fast */ 1095 if (cmd->scan_begin_src == TRIG_TIMER) { 1096 if (cmd->convert_src == TRIG_TIMER && 1097 cmd->scan_begin_arg < 1098 cmd->convert_arg * cmd->chanlist_len) { 1099 cmd->scan_begin_arg = 1100 cmd->convert_arg * cmd->chanlist_len; 1101 err++; 1102 } 1103 if (cmd->scan_begin_arg < 1104 thisboard->ai_speed * cmd->chanlist_len) { 1105 cmd->scan_begin_arg = 1106 thisboard->ai_speed * cmd->chanlist_len; 1107 err++; 1108 } 1109 } 1110 /* stop source */ 1111 switch (cmd->stop_src) { 1112 case TRIG_COUNT: 1113 if (!cmd->stop_arg) { 1114 cmd->stop_arg = 1; 1115 err++; 1116 } 1117 break; 1118 case TRIG_NONE: 1119 if (cmd->stop_arg != 0) { 1120 cmd->stop_arg = 0; 1121 err++; 1122 } 1123 break; 1124 /* 1125 * TRIG_EXT doesn't care since it doesn't 1126 * trigger off a numbered channel 1127 */ 1128 default: 1129 break; 1130 } 1131 1132 if (err) 1133 return 3; 1134 1135 /* step 4: fix up any arguments */ 1136 1137 tmp = cmd->convert_arg; 1138 tmp2 = cmd->scan_begin_arg; 1139 labpc_adc_timing(dev, cmd); 1140 if (tmp != cmd->convert_arg || tmp2 != cmd->scan_begin_arg) 1141 err++; 1142 1143 if (err) 1144 return 4; 1145 1146 if (labpc_ai_chanlist_invalid(dev, cmd)) 1147 return 5; 1148 1149 return 0; 1150} 1151 1152static int labpc_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s) 1153{ 1154 int channel, range, aref; 1155#ifdef CONFIG_ISA_DMA_API 1156 unsigned long irq_flags; 1157#endif 1158 int ret; 1159 struct comedi_async *async = s->async; 1160 struct comedi_cmd *cmd = &async->cmd; 1161 enum transfer_type xfer; 1162 unsigned long flags; 1163 1164 if (!dev->irq) { 1165 comedi_error(dev, "no irq assigned, cannot perform command"); 1166 return -1; 1167 } 1168 1169 range = CR_RANGE(cmd->chanlist[0]); 1170 aref = CR_AREF(cmd->chanlist[0]); 1171 1172 /* make sure board is disabled before setting up acquisition */ 1173 spin_lock_irqsave(&dev->spinlock, flags); 1174 devpriv->command2_bits &= ~SWTRIG_BIT & ~HWTRIG_BIT & ~PRETRIG_BIT; 1175 devpriv->write_byte(devpriv->command2_bits, dev->iobase + COMMAND2_REG); 1176 spin_unlock_irqrestore(&dev->spinlock, flags); 1177 1178 devpriv->command3_bits = 0; 1179 devpriv->write_byte(devpriv->command3_bits, dev->iobase + COMMAND3_REG); 1180 1181 /* initialize software conversion count */ 1182 if (cmd->stop_src == TRIG_COUNT) 1183 devpriv->count = cmd->stop_arg * cmd->chanlist_len; 1184 1185 /* setup hardware conversion counter */ 1186 if (cmd->stop_src == TRIG_EXT) { 1187 /* 1188 * load counter a1 with count of 3 1189 * (pc+ manual says this is minimum allowed) using mode 0 1190 */ 1191 ret = labpc_counter_load(dev, dev->iobase + COUNTER_A_BASE_REG, 1192 1, 3, 0); 1193 if (ret < 0) { 1194 comedi_error(dev, "error loading counter a1"); 1195 return -1; 1196 } 1197 } else /* 1198 * otherwise, just put a1 in mode 0 1199 * with no count to set its output low 1200 */ 1201 devpriv->write_byte(INIT_A1_BITS, 1202 dev->iobase + COUNTER_A_CONTROL_REG); 1203 1204#ifdef CONFIG_ISA_DMA_API 1205 /* figure out what method we will use to transfer data */ 1206 if (devpriv->dma_chan && /* need a dma channel allocated */ 1207 /* 1208 * dma unsafe at RT priority, 1209 * and too much setup time for TRIG_WAKE_EOS for 1210 */ 1211 (cmd->flags & (TRIG_WAKE_EOS | TRIG_RT)) == 0 && 1212 /* only available on the isa boards */ 1213 thisboard->bustype == isa_bustype) { 1214 xfer = isa_dma_transfer; 1215 /* pc-plus has no fifo-half full interrupt */ 1216 } else 1217#endif 1218 if (thisboard->register_layout == labpc_1200_layout && 1219 /* wake-end-of-scan should interrupt on fifo not empty */ 1220 (cmd->flags & TRIG_WAKE_EOS) == 0 && 1221 /* make sure we are taking more than just a few points */ 1222 (cmd->stop_src != TRIG_COUNT || devpriv->count > 256)) { 1223 xfer = fifo_half_full_transfer; 1224 } else 1225 xfer = fifo_not_empty_transfer; 1226 devpriv->current_transfer = xfer; 1227 1228 /* setup command6 register for 1200 boards */ 1229 if (thisboard->register_layout == labpc_1200_layout) { 1230 /* reference inputs to ground or common? */ 1231 if (aref != AREF_GROUND) 1232 devpriv->command6_bits |= ADC_COMMON_BIT; 1233 else 1234 devpriv->command6_bits &= ~ADC_COMMON_BIT; 1235 /* bipolar or unipolar range? */ 1236 if (thisboard->ai_range_is_unipolar[range]) 1237 devpriv->command6_bits |= ADC_UNIP_BIT; 1238 else 1239 devpriv->command6_bits &= ~ADC_UNIP_BIT; 1240 /* interrupt on fifo half full? */ 1241 if (xfer == fifo_half_full_transfer) 1242 devpriv->command6_bits |= ADC_FHF_INTR_EN_BIT; 1243 else 1244 devpriv->command6_bits &= ~ADC_FHF_INTR_EN_BIT; 1245 /* enable interrupt on counter a1 terminal count? */ 1246 if (cmd->stop_src == TRIG_EXT) 1247 devpriv->command6_bits |= A1_INTR_EN_BIT; 1248 else 1249 devpriv->command6_bits &= ~A1_INTR_EN_BIT; 1250 /* are we scanning up or down through channels? */ 1251 if (labpc_ai_scan_mode(cmd) == MODE_MULT_CHAN_UP) 1252 devpriv->command6_bits |= ADC_SCAN_UP_BIT; 1253 else 1254 devpriv->command6_bits &= ~ADC_SCAN_UP_BIT; 1255 /* write to register */ 1256 devpriv->write_byte(devpriv->command6_bits, 1257 dev->iobase + COMMAND6_REG); 1258 } 1259 1260 /* setup channel list, etc (command1 register) */ 1261 devpriv->command1_bits = 0; 1262 if (labpc_ai_scan_mode(cmd) == MODE_MULT_CHAN_UP) 1263 channel = CR_CHAN(cmd->chanlist[cmd->chanlist_len - 1]); 1264 else 1265 channel = CR_CHAN(cmd->chanlist[0]); 1266 /* munge channel bits for differential / scan disabled mode */ 1267 if (labpc_ai_scan_mode(cmd) != MODE_SINGLE_CHAN && aref == AREF_DIFF) 1268 channel *= 2; 1269 devpriv->command1_bits |= ADC_CHAN_BITS(channel); 1270 devpriv->command1_bits |= thisboard->ai_range_code[range]; 1271 devpriv->write_byte(devpriv->command1_bits, dev->iobase + COMMAND1_REG); 1272 /* manual says to set scan enable bit on second pass */ 1273 if (labpc_ai_scan_mode(cmd) == MODE_MULT_CHAN_UP || 1274 labpc_ai_scan_mode(cmd) == MODE_MULT_CHAN_DOWN) { 1275 devpriv->command1_bits |= ADC_SCAN_EN_BIT; 1276 /* need a brief delay before enabling scan, or scan 1277 * list will get screwed when you switch 1278 * between scan up to scan down mode - dunno why */ 1279 udelay(1); 1280 devpriv->write_byte(devpriv->command1_bits, 1281 dev->iobase + COMMAND1_REG); 1282 } 1283 /* setup any external triggering/pacing (command4 register) */ 1284 devpriv->command4_bits = 0; 1285 if (cmd->convert_src != TRIG_EXT) 1286 devpriv->command4_bits |= EXT_CONVERT_DISABLE_BIT; 1287 /* XXX should discard first scan when using interval scanning 1288 * since manual says it is not synced with scan clock */ 1289 if (labpc_use_continuous_mode(cmd) == 0) { 1290 devpriv->command4_bits |= INTERVAL_SCAN_EN_BIT; 1291 if (cmd->scan_begin_src == TRIG_EXT) 1292 devpriv->command4_bits |= EXT_SCAN_EN_BIT; 1293 } 1294 /* single-ended/differential */ 1295 if (aref == AREF_DIFF) 1296 devpriv->command4_bits |= ADC_DIFF_BIT; 1297 devpriv->write_byte(devpriv->command4_bits, dev->iobase + COMMAND4_REG); 1298 1299 devpriv->write_byte(cmd->chanlist_len, 1300 dev->iobase + INTERVAL_COUNT_REG); 1301 /* load count */ 1302 devpriv->write_byte(INTERVAL_LOAD_BITS, 1303 dev->iobase + INTERVAL_LOAD_REG); 1304 1305 if (cmd->convert_src == TRIG_TIMER || cmd->scan_begin_src == TRIG_TIMER) { 1306 /* set up pacing */ 1307 labpc_adc_timing(dev, cmd); 1308 /* load counter b0 in mode 3 */ 1309 ret = labpc_counter_load(dev, dev->iobase + COUNTER_B_BASE_REG, 1310 0, devpriv->divisor_b0, 3); 1311 if (ret < 0) { 1312 comedi_error(dev, "error loading counter b0"); 1313 return -1; 1314 } 1315 } 1316 /* set up conversion pacing */ 1317 if (labpc_ai_convert_period(cmd)) { 1318 /* load counter a0 in mode 2 */ 1319 ret = labpc_counter_load(dev, dev->iobase + COUNTER_A_BASE_REG, 1320 0, devpriv->divisor_a0, 2); 1321 if (ret < 0) { 1322 comedi_error(dev, "error loading counter a0"); 1323 return -1; 1324 } 1325 } else 1326 devpriv->write_byte(INIT_A0_BITS, 1327 dev->iobase + COUNTER_A_CONTROL_REG); 1328 1329 /* set up scan pacing */ 1330 if (labpc_ai_scan_period(cmd)) { 1331 /* load counter b1 in mode 2 */ 1332 ret = labpc_counter_load(dev, dev->iobase + COUNTER_B_BASE_REG, 1333 1, devpriv->divisor_b1, 2); 1334 if (ret < 0) { 1335 comedi_error(dev, "error loading counter b1"); 1336 return -1; 1337 } 1338 } 1339 1340 labpc_clear_adc_fifo(dev); 1341 1342#ifdef CONFIG_ISA_DMA_API 1343 /* set up dma transfer */ 1344 if (xfer == isa_dma_transfer) { 1345 irq_flags = claim_dma_lock(); 1346 disable_dma(devpriv->dma_chan); 1347 /* clear flip-flop to make sure 2-byte registers for 1348 * count and address get set correctly */ 1349 clear_dma_ff(devpriv->dma_chan); 1350 set_dma_addr(devpriv->dma_chan, 1351 virt_to_bus(devpriv->dma_buffer)); 1352 /* set appropriate size of transfer */ 1353 devpriv->dma_transfer_size = labpc_suggest_transfer_size(*cmd); 1354 if (cmd->stop_src == TRIG_COUNT && 1355 devpriv->count * sample_size < devpriv->dma_transfer_size) { 1356 devpriv->dma_transfer_size = 1357 devpriv->count * sample_size; 1358 } 1359 set_dma_count(devpriv->dma_chan, devpriv->dma_transfer_size); 1360 enable_dma(devpriv->dma_chan); 1361 release_dma_lock(irq_flags); 1362 /* enable board's dma */ 1363 devpriv->command3_bits |= DMA_EN_BIT | DMATC_INTR_EN_BIT; 1364 } else 1365 devpriv->command3_bits &= ~DMA_EN_BIT & ~DMATC_INTR_EN_BIT; 1366#endif 1367 1368 /* enable error interrupts */ 1369 devpriv->command3_bits |= ERR_INTR_EN_BIT; 1370 /* enable fifo not empty interrupt? */ 1371 if (xfer == fifo_not_empty_transfer) 1372 devpriv->command3_bits |= ADC_FNE_INTR_EN_BIT; 1373 else 1374 devpriv->command3_bits &= ~ADC_FNE_INTR_EN_BIT; 1375 devpriv->write_byte(devpriv->command3_bits, dev->iobase + COMMAND3_REG); 1376 1377 /* startup acquisition */ 1378 1379 /* command2 reg */ 1380 /* use 2 cascaded counters for pacing */ 1381 spin_lock_irqsave(&dev->spinlock, flags); 1382 devpriv->command2_bits |= CASCADE_BIT; 1383 switch (cmd->start_src) { 1384 case TRIG_EXT: 1385 devpriv->command2_bits |= HWTRIG_BIT; 1386 devpriv->command2_bits &= ~PRETRIG_BIT & ~SWTRIG_BIT; 1387 break; 1388 case TRIG_NOW: 1389 devpriv->command2_bits |= SWTRIG_BIT; 1390 devpriv->command2_bits &= ~PRETRIG_BIT & ~HWTRIG_BIT; 1391 break; 1392 default: 1393 comedi_error(dev, "bug with start_src"); 1394 return -1; 1395 break; 1396 } 1397 switch (cmd->stop_src) { 1398 case TRIG_EXT: 1399 devpriv->command2_bits |= HWTRIG_BIT | PRETRIG_BIT; 1400 break; 1401 case TRIG_COUNT: 1402 case TRIG_NONE: 1403 break; 1404 default: 1405 comedi_error(dev, "bug with stop_src"); 1406 return -1; 1407 } 1408 devpriv->write_byte(devpriv->command2_bits, dev->iobase + COMMAND2_REG); 1409 spin_unlock_irqrestore(&dev->spinlock, flags); 1410 1411 return 0; 1412} 1413 1414/* interrupt service routine */ 1415static irqreturn_t labpc_interrupt(int irq, void *d) 1416{ 1417 struct comedi_device *dev = d; 1418 struct comedi_subdevice *s = dev->read_subdev; 1419 struct comedi_async *async; 1420 struct comedi_cmd *cmd; 1421 1422 if (dev->attached == 0) { 1423 comedi_error(dev, "premature interrupt"); 1424 return IRQ_HANDLED; 1425 } 1426 1427 async = s->async; 1428 cmd = &async->cmd; 1429 async->events = 0; 1430 1431 /* read board status */ 1432 devpriv->status1_bits = devpriv->read_byte(dev->iobase + STATUS1_REG); 1433 if (thisboard->register_layout == labpc_1200_layout) 1434 devpriv->status2_bits = 1435 devpriv->read_byte(dev->iobase + STATUS2_REG); 1436 1437 if ((devpriv->status1_bits & (DMATC_BIT | TIMER_BIT | OVERFLOW_BIT | 1438 OVERRUN_BIT | DATA_AVAIL_BIT)) == 0 1439 && (devpriv->status2_bits & A1_TC_BIT) == 0 1440 && (devpriv->status2_bits & FNHF_BIT)) { 1441 return IRQ_NONE; 1442 } 1443 1444 if (devpriv->status1_bits & OVERRUN_BIT) { 1445 /* clear error interrupt */ 1446 devpriv->write_byte(0x1, dev->iobase + ADC_CLEAR_REG); 1447 async->events |= COMEDI_CB_ERROR | COMEDI_CB_EOA; 1448 comedi_event(dev, s); 1449 comedi_error(dev, "overrun"); 1450 return IRQ_HANDLED; 1451 } 1452 1453#ifdef CONFIG_ISA_DMA_API 1454 if (devpriv->current_transfer == isa_dma_transfer) { 1455 /* 1456 * if a dma terminal count of external stop trigger 1457 * has occurred 1458 */ 1459 if (devpriv->status1_bits & DMATC_BIT || 1460 (thisboard->register_layout == labpc_1200_layout 1461 && devpriv->status2_bits & A1_TC_BIT)) { 1462 handle_isa_dma(dev); 1463 } 1464 } else 1465#endif 1466 labpc_drain_fifo(dev); 1467 1468 if (devpriv->status1_bits & TIMER_BIT) { 1469 comedi_error(dev, "handled timer interrupt?"); 1470 /* clear it */ 1471 devpriv->write_byte(0x1, dev->iobase + TIMER_CLEAR_REG); 1472 } 1473 1474 if (devpriv->status1_bits & OVERFLOW_BIT) { 1475 /* clear error interrupt */ 1476 devpriv->write_byte(0x1, dev->iobase + ADC_CLEAR_REG); 1477 async->events |= COMEDI_CB_ERROR | COMEDI_CB_EOA; 1478 comedi_event(dev, s); 1479 comedi_error(dev, "overflow"); 1480 return IRQ_HANDLED; 1481 } 1482 /* handle external stop trigger */ 1483 if (cmd->stop_src == TRIG_EXT) { 1484 if (devpriv->status2_bits & A1_TC_BIT) { 1485 labpc_drain_dregs(dev); 1486 labpc_cancel(dev, s); 1487 async->events |= COMEDI_CB_EOA; 1488 } 1489 } 1490 1491 /* TRIG_COUNT end of acquisition */ 1492 if (cmd->stop_src == TRIG_COUNT) { 1493 if (devpriv->count == 0) { 1494 labpc_cancel(dev, s); 1495 async->events |= COMEDI_CB_EOA; 1496 } 1497 } 1498 1499 comedi_event(dev, s); 1500 return IRQ_HANDLED; 1501} 1502 1503/* read all available samples from ai fifo */ 1504static int labpc_drain_fifo(struct comedi_device *dev) 1505{ 1506 unsigned int lsb, msb; 1507 short data; 1508 struct comedi_async *async = dev->read_subdev->async; 1509 const int timeout = 10000; 1510 unsigned int i; 1511 1512 devpriv->status1_bits = devpriv->read_byte(dev->iobase + STATUS1_REG); 1513 1514 for (i = 0; (devpriv->status1_bits & DATA_AVAIL_BIT) && i < timeout; 1515 i++) { 1516 /* quit if we have all the data we want */ 1517 if (async->cmd.stop_src == TRIG_COUNT) { 1518 if (devpriv->count == 0) 1519 break; 1520 devpriv->count--; 1521 } 1522 lsb = devpriv->read_byte(dev->iobase + ADC_FIFO_REG); 1523 msb = devpriv->read_byte(dev->iobase + ADC_FIFO_REG); 1524 data = (msb << 8) | lsb; 1525 cfc_write_to_buffer(dev->read_subdev, data); 1526 devpriv->status1_bits = 1527 devpriv->read_byte(dev->iobase + STATUS1_REG); 1528 } 1529 if (i == timeout) { 1530 comedi_error(dev, "ai timeout, fifo never empties"); 1531 async->events |= COMEDI_CB_ERROR | COMEDI_CB_EOA; 1532 return -1; 1533 } 1534 1535 return 0; 1536} 1537 1538#ifdef CONFIG_ISA_DMA_API 1539static void labpc_drain_dma(struct comedi_device *dev) 1540{ 1541 struct comedi_subdevice *s = dev->read_subdev; 1542 struct comedi_async *async = s->async; 1543 int status; 1544 unsigned long flags; 1545 unsigned int max_points, num_points, residue, leftover; 1546 int i; 1547 1548 status = devpriv->status1_bits; 1549 1550 flags = claim_dma_lock(); 1551 disable_dma(devpriv->dma_chan); 1552 /* clear flip-flop to make sure 2-byte registers for 1553 * count and address get set correctly */ 1554 clear_dma_ff(devpriv->dma_chan); 1555 1556 /* figure out how many points to read */ 1557 max_points = devpriv->dma_transfer_size / sample_size; 1558 /* residue is the number of points left to be done on the dma 1559 * transfer. It should always be zero at this point unless 1560 * the stop_src is set to external triggering. 1561 */ 1562 residue = get_dma_residue(devpriv->dma_chan) / sample_size; 1563 num_points = max_points - residue; 1564 if (devpriv->count < num_points && async->cmd.stop_src == TRIG_COUNT) 1565 num_points = devpriv->count; 1566 1567 /* figure out how many points will be stored next time */ 1568 leftover = 0; 1569 if (async->cmd.stop_src != TRIG_COUNT) { 1570 leftover = devpriv->dma_transfer_size / sample_size; 1571 } else if (devpriv->count > num_points) { 1572 leftover = devpriv->count - num_points; 1573 if (leftover > max_points) 1574 leftover = max_points; 1575 } 1576 1577 /* write data to comedi buffer */ 1578 for (i = 0; i < num_points; i++) 1579 cfc_write_to_buffer(s, devpriv->dma_buffer[i]); 1580 1581 if (async->cmd.stop_src == TRIG_COUNT) 1582 devpriv->count -= num_points; 1583 1584 /* set address and count for next transfer */ 1585 set_dma_addr(devpriv->dma_chan, virt_to_bus(devpriv->dma_buffer)); 1586 set_dma_count(devpriv->dma_chan, leftover * sample_size); 1587 release_dma_lock(flags); 1588 1589 async->events |= COMEDI_CB_BLOCK; 1590} 1591 1592static void handle_isa_dma(struct comedi_device *dev) 1593{ 1594 labpc_drain_dma(dev); 1595 1596 enable_dma(devpriv->dma_chan); 1597 1598 /* clear dma tc interrupt */ 1599 devpriv->write_byte(0x1, dev->iobase + DMATC_CLEAR_REG); 1600} 1601#endif 1602 1603/* makes sure all data acquired by board is transferred to comedi (used 1604 * when acquisition is terminated by stop_src == TRIG_EXT). */ 1605static void labpc_drain_dregs(struct comedi_device *dev) 1606{ 1607#ifdef CONFIG_ISA_DMA_API 1608 if (devpriv->current_transfer == isa_dma_transfer) 1609 labpc_drain_dma(dev); 1610#endif 1611 1612 labpc_drain_fifo(dev); 1613} 1614 1615static int labpc_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s, 1616 struct comedi_insn *insn, unsigned int *data) 1617{ 1618 int i, n; 1619 int chan, range; 1620 int lsb, msb; 1621 int timeout = 1000; 1622 unsigned long flags; 1623 1624 /* disable timed conversions */ 1625 spin_lock_irqsave(&dev->spinlock, flags); 1626 devpriv->command2_bits &= ~SWTRIG_BIT & ~HWTRIG_BIT & ~PRETRIG_BIT; 1627 devpriv->write_byte(devpriv->command2_bits, dev->iobase + COMMAND2_REG); 1628 spin_unlock_irqrestore(&dev->spinlock, flags); 1629 1630 /* disable interrupt generation and dma */ 1631 devpriv->command3_bits = 0; 1632 devpriv->write_byte(devpriv->command3_bits, dev->iobase + COMMAND3_REG); 1633 1634 /* set gain and channel */ 1635 devpriv->command1_bits = 0; 1636 chan = CR_CHAN(insn->chanspec); 1637 range = CR_RANGE(insn->chanspec); 1638 devpriv->command1_bits |= thisboard->ai_range_code[range]; 1639 /* munge channel bits for differential/scan disabled mode */ 1640 if (CR_AREF(insn->chanspec) == AREF_DIFF) 1641 chan *= 2; 1642 devpriv->command1_bits |= ADC_CHAN_BITS(chan); 1643 devpriv->write_byte(devpriv->command1_bits, dev->iobase + COMMAND1_REG); 1644 1645 /* setup command6 register for 1200 boards */ 1646 if (thisboard->register_layout == labpc_1200_layout) { 1647 /* reference inputs to ground or common? */ 1648 if (CR_AREF(insn->chanspec) != AREF_GROUND) 1649 devpriv->command6_bits |= ADC_COMMON_BIT; 1650 else 1651 devpriv->command6_bits &= ~ADC_COMMON_BIT; 1652 /* bipolar or unipolar range? */ 1653 if (thisboard->ai_range_is_unipolar[range]) 1654 devpriv->command6_bits |= ADC_UNIP_BIT; 1655 else 1656 devpriv->command6_bits &= ~ADC_UNIP_BIT; 1657 /* don't interrupt on fifo half full */ 1658 devpriv->command6_bits &= ~ADC_FHF_INTR_EN_BIT; 1659 /* don't enable interrupt on counter a1 terminal count? */ 1660 devpriv->command6_bits &= ~A1_INTR_EN_BIT; 1661 /* write to register */ 1662 devpriv->write_byte(devpriv->command6_bits, 1663 dev->iobase + COMMAND6_REG); 1664 } 1665 /* setup command4 register */ 1666 devpriv->command4_bits = 0; 1667 devpriv->command4_bits |= EXT_CONVERT_DISABLE_BIT; 1668 /* single-ended/differential */ 1669 if (CR_AREF(insn->chanspec) == AREF_DIFF) 1670 devpriv->command4_bits |= ADC_DIFF_BIT; 1671 devpriv->write_byte(devpriv->command4_bits, dev->iobase + COMMAND4_REG); 1672 1673 /* 1674 * initialize pacer counter output to make sure it doesn't 1675 * cause any problems 1676 */ 1677 devpriv->write_byte(INIT_A0_BITS, dev->iobase + COUNTER_A_CONTROL_REG); 1678 1679 labpc_clear_adc_fifo(dev); 1680 1681 for (n = 0; n < insn->n; n++) { 1682 /* trigger conversion */ 1683 devpriv->write_byte(0x1, dev->iobase + ADC_CONVERT_REG); 1684 1685 for (i = 0; i < timeout; i++) { 1686 if (devpriv->read_byte(dev->iobase + 1687 STATUS1_REG) & DATA_AVAIL_BIT) 1688 break; 1689 udelay(1); 1690 } 1691 if (i == timeout) { 1692 comedi_error(dev, "timeout"); 1693 return -ETIME; 1694 } 1695 lsb = devpriv->read_byte(dev->iobase + ADC_FIFO_REG); 1696 msb = devpriv->read_byte(dev->iobase + ADC_FIFO_REG); 1697 data[n] = (msb << 8) | lsb; 1698 } 1699 1700 return n; 1701} 1702 1703/* analog output insn */ 1704static int labpc_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s, 1705 struct comedi_insn *insn, unsigned int *data) 1706{ 1707 int channel, range; 1708 unsigned long flags; 1709 int lsb, msb; 1710 1711 channel = CR_CHAN(insn->chanspec); 1712 1713 /* turn off pacing of analog output channel */ 1714 /* note: hardware bug in daqcard-1200 means pacing cannot 1715 * be independently enabled/disabled for its the two channels */ 1716 spin_lock_irqsave(&dev->spinlock, flags); 1717 devpriv->command2_bits &= ~DAC_PACED_BIT(channel); 1718 devpriv->write_byte(devpriv->command2_bits, dev->iobase + COMMAND2_REG); 1719 spin_unlock_irqrestore(&dev->spinlock, flags); 1720 1721 /* set range */ 1722 if (thisboard->register_layout == labpc_1200_layout) { 1723 range = CR_RANGE(insn->chanspec); 1724 if (range & AO_RANGE_IS_UNIPOLAR) 1725 devpriv->command6_bits |= DAC_UNIP_BIT(channel); 1726 else 1727 devpriv->command6_bits &= ~DAC_UNIP_BIT(channel); 1728 /* write to register */ 1729 devpriv->write_byte(devpriv->command6_bits, 1730 dev->iobase + COMMAND6_REG); 1731 } 1732 /* send data */ 1733 lsb = data[0] & 0xff; 1734 msb = (data[0] >> 8) & 0xff; 1735 devpriv->write_byte(lsb, dev->iobase + DAC_LSB_REG(channel)); 1736 devpriv->write_byte(msb, dev->iobase + DAC_MSB_REG(channel)); 1737 1738 /* remember value for readback */ 1739 devpriv->ao_value[channel] = data[0]; 1740 1741 return 1; 1742} 1743 1744/* analog output readback insn */ 1745static int labpc_ao_rinsn(struct comedi_device *dev, struct comedi_subdevice *s, 1746 struct comedi_insn *insn, unsigned int *data) 1747{ 1748 data[0] = devpriv->ao_value[CR_CHAN(insn->chanspec)]; 1749 1750 return 1; 1751} 1752 1753static int labpc_calib_read_insn(struct comedi_device *dev, 1754 struct comedi_subdevice *s, 1755 struct comedi_insn *insn, unsigned int *data) 1756{ 1757 data[0] = devpriv->caldac[CR_CHAN(insn->chanspec)]; 1758 1759 return 1; 1760} 1761 1762static int labpc_calib_write_insn(struct comedi_device *dev, 1763 struct comedi_subdevice *s, 1764 struct comedi_insn *insn, unsigned int *data) 1765{ 1766 int channel = CR_CHAN(insn->chanspec); 1767 1768 write_caldac(dev, channel, data[0]); 1769 return 1; 1770} 1771 1772static int labpc_eeprom_read_insn(struct comedi_device *dev, 1773 struct comedi_subdevice *s, 1774 struct comedi_insn *insn, unsigned int *data) 1775{ 1776 data[0] = devpriv->eeprom_data[CR_CHAN(insn->chanspec)]; 1777 1778 return 1; 1779} 1780 1781static int labpc_eeprom_write_insn(struct comedi_device *dev, 1782 struct comedi_subdevice *s, 1783 struct comedi_insn *insn, unsigned int *data) 1784{ 1785 int channel = CR_CHAN(insn->chanspec); 1786 int ret; 1787 1788 /* only allow writes to user area of eeprom */ 1789 if (channel < 16 || channel > 127) { 1790 printk 1791 ("eeprom writes are only allowed to channels 16 through 127 (the pointer and user areas)"); 1792 return -EINVAL; 1793 } 1794 1795 ret = labpc_eeprom_write(dev, channel, data[0]); 1796 if (ret < 0) 1797 return ret; 1798 1799 return 1; 1800} 1801 1802#ifdef CONFIG_ISA_DMA_API 1803/* utility function that suggests a dma transfer size in bytes */ 1804static unsigned int labpc_suggest_transfer_size(struct comedi_cmd cmd) 1805{ 1806 unsigned int size; 1807 unsigned int freq; 1808 1809 if (cmd.convert_src == TRIG_TIMER) 1810 freq = 1000000000 / cmd.convert_arg; 1811 /* return some default value */ 1812 else 1813 freq = 0xffffffff; 1814 1815 /* make buffer fill in no more than 1/3 second */ 1816 size = (freq / 3) * sample_size; 1817 1818 /* set a minimum and maximum size allowed */ 1819 if (size > dma_buffer_size) 1820 size = dma_buffer_size - dma_buffer_size % sample_size; 1821 else if (size < sample_size) 1822 size = sample_size; 1823 1824 return size; 1825} 1826#endif 1827 1828/* figures out what counter values to use based on command */ 1829static void labpc_adc_timing(struct comedi_device *dev, struct comedi_cmd *cmd) 1830{ 1831 /* max value for 16 bit counter in mode 2 */ 1832 const int max_counter_value = 0x10000; 1833 /* min value for 16 bit counter in mode 2 */ 1834 const int min_counter_value = 2; 1835 unsigned int base_period; 1836 1837 /* 1838 * if both convert and scan triggers are TRIG_TIMER, then they 1839 * both rely on counter b0 1840 */ 1841 if (labpc_ai_convert_period(cmd) && labpc_ai_scan_period(cmd)) { 1842 /* 1843 * pick the lowest b0 divisor value we can (for maximum input 1844 * clock speed on convert and scan counters) 1845 */ 1846 devpriv->divisor_b0 = (labpc_ai_scan_period(cmd) - 1) / 1847 (LABPC_TIMER_BASE * max_counter_value) + 1; 1848 if (devpriv->divisor_b0 < min_counter_value) 1849 devpriv->divisor_b0 = min_counter_value; 1850 if (devpriv->divisor_b0 > max_counter_value) 1851 devpriv->divisor_b0 = max_counter_value; 1852 1853 base_period = LABPC_TIMER_BASE * devpriv->divisor_b0; 1854 1855 /* set a0 for conversion frequency and b1 for scan frequency */ 1856 switch (cmd->flags & TRIG_ROUND_MASK) { 1857 default: 1858 case TRIG_ROUND_NEAREST: 1859 devpriv->divisor_a0 = 1860 (labpc_ai_convert_period(cmd) + 1861 (base_period / 2)) / base_period; 1862 devpriv->divisor_b1 = 1863 (labpc_ai_scan_period(cmd) + 1864 (base_period / 2)) / base_period; 1865 break; 1866 case TRIG_ROUND_UP: 1867 devpriv->divisor_a0 = 1868 (labpc_ai_convert_period(cmd) + (base_period - 1869 1)) / base_period; 1870 devpriv->divisor_b1 = 1871 (labpc_ai_scan_period(cmd) + (base_period - 1872 1)) / base_period; 1873 break; 1874 case TRIG_ROUND_DOWN: 1875 devpriv->divisor_a0 = 1876 labpc_ai_convert_period(cmd) / base_period; 1877 devpriv->divisor_b1 = 1878 labpc_ai_scan_period(cmd) / base_period; 1879 break; 1880 } 1881 /* make sure a0 and b1 values are acceptable */ 1882 if (devpriv->divisor_a0 < min_counter_value) 1883 devpriv->divisor_a0 = min_counter_value; 1884 if (devpriv->divisor_a0 > max_counter_value) 1885 devpriv->divisor_a0 = max_counter_value; 1886 if (devpriv->divisor_b1 < min_counter_value) 1887 devpriv->divisor_b1 = min_counter_value; 1888 if (devpriv->divisor_b1 > max_counter_value) 1889 devpriv->divisor_b1 = max_counter_value; 1890 /* write corrected timings to command */ 1891 labpc_set_ai_convert_period(cmd, 1892 base_period * devpriv->divisor_a0); 1893 labpc_set_ai_scan_period(cmd, 1894 base_period * devpriv->divisor_b1); 1895 /* 1896 * if only one TRIG_TIMER is used, we can employ the generic 1897 * cascaded timing functions 1898 */ 1899 } else if (labpc_ai_scan_period(cmd)) { 1900 unsigned int scan_period; 1901 1902 scan_period = labpc_ai_scan_period(cmd); 1903 /* 1904 * calculate cascaded counter values 1905 * that give desired scan timing 1906 */ 1907 i8253_cascade_ns_to_timer_2div(LABPC_TIMER_BASE, 1908 &(devpriv->divisor_b1), 1909 &(devpriv->divisor_b0), 1910 &scan_period, 1911 cmd->flags & TRIG_ROUND_MASK); 1912 labpc_set_ai_scan_period(cmd, scan_period); 1913 } else if (labpc_ai_convert_period(cmd)) { 1914 unsigned int convert_period; 1915 1916 convert_period = labpc_ai_convert_period(cmd); 1917 /* 1918 * calculate cascaded counter values 1919 * that give desired conversion timing 1920 */ 1921 i8253_cascade_ns_to_timer_2div(LABPC_TIMER_BASE, 1922 &(devpriv->divisor_a0), 1923 &(devpriv->divisor_b0), 1924 &convert_period, 1925 cmd->flags & TRIG_ROUND_MASK); 1926 labpc_set_ai_convert_period(cmd, convert_period); 1927 } 1928} 1929 1930static int labpc_dio_mem_callback(int dir, int port, int data, 1931 unsigned long iobase) 1932{ 1933 if (dir) { 1934 writeb(data, (void *)(iobase + port)); 1935 return 0; 1936 } else { 1937 return readb((void *)(iobase + port)); 1938 } 1939} 1940 1941/* lowlevel write to eeprom/dac */ 1942static void labpc_serial_out(struct comedi_device *dev, unsigned int value, 1943 unsigned int value_width) 1944{ 1945 int i; 1946 1947 for (i = 1; i <= value_width; i++) { 1948 /* clear serial clock */ 1949 devpriv->command5_bits &= ~SCLOCK_BIT; 1950 /* send bits most significant bit first */ 1951 if (value & (1 << (value_width - i))) 1952 devpriv->command5_bits |= SDATA_BIT; 1953 else 1954 devpriv->command5_bits &= ~SDATA_BIT; 1955 udelay(1); 1956 devpriv->write_byte(devpriv->command5_bits, 1957 dev->iobase + COMMAND5_REG); 1958 /* set clock to load bit */ 1959 devpriv->command5_bits |= SCLOCK_BIT; 1960 udelay(1); 1961 devpriv->write_byte(devpriv->command5_bits, 1962 dev->iobase + COMMAND5_REG); 1963 } 1964} 1965 1966/* lowlevel read from eeprom */ 1967static unsigned int labpc_serial_in(struct comedi_device *dev) 1968{ 1969 unsigned int value = 0; 1970 int i; 1971 const int value_width = 8; /* number of bits wide values are */ 1972 1973 for (i = 1; i <= value_width; i++) { 1974 /* set serial clock */ 1975 devpriv->command5_bits |= SCLOCK_BIT; 1976 udelay(1); 1977 devpriv->write_byte(devpriv->command5_bits, 1978 dev->iobase + COMMAND5_REG); 1979 /* clear clock bit */ 1980 devpriv->command5_bits &= ~SCLOCK_BIT; 1981 udelay(1); 1982 devpriv->write_byte(devpriv->command5_bits, 1983 dev->iobase + COMMAND5_REG); 1984 /* read bits most significant bit first */ 1985 udelay(1); 1986 devpriv->status2_bits = 1987 devpriv->read_byte(dev->iobase + STATUS2_REG); 1988 if (devpriv->status2_bits & EEPROM_OUT_BIT) 1989 value |= 1 << (value_width - i); 1990 } 1991 1992 return value; 1993} 1994 1995static unsigned int labpc_eeprom_read(struct comedi_device *dev, 1996 unsigned int address) 1997{ 1998 unsigned int value; 1999 /* bits to tell eeprom to expect a read */ 2000 const int read_instruction = 0x3; 2001 /* 8 bit write lengths to eeprom */ 2002 const int write_length = 8; 2003 2004 /* enable read/write to eeprom */ 2005 devpriv->command5_bits &= ~EEPROM_EN_BIT; 2006 udelay(1); 2007 devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); 2008 devpriv->command5_bits |= EEPROM_EN_BIT | EEPROM_WRITE_UNPROTECT_BIT; 2009 udelay(1); 2010 devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); 2011 2012 /* send read instruction */ 2013 labpc_serial_out(dev, read_instruction, write_length); 2014 /* send 8 bit address to read from */ 2015 labpc_serial_out(dev, address, write_length); 2016 /* read result */ 2017 value = labpc_serial_in(dev); 2018 2019 /* disable read/write to eeprom */ 2020 devpriv->command5_bits &= ~EEPROM_EN_BIT & ~EEPROM_WRITE_UNPROTECT_BIT; 2021 udelay(1); 2022 devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); 2023 2024 return value; 2025} 2026 2027static int labpc_eeprom_write(struct comedi_device *dev, 2028 unsigned int address, unsigned int value) 2029{ 2030 const int write_enable_instruction = 0x6; 2031 const int write_instruction = 0x2; 2032 const int write_length = 8; /* 8 bit write lengths to eeprom */ 2033 const int write_in_progress_bit = 0x1; 2034 const int timeout = 10000; 2035 int i; 2036 2037 /* make sure there isn't already a write in progress */ 2038 for (i = 0; i < timeout; i++) { 2039 if ((labpc_eeprom_read_status(dev) & write_in_progress_bit) == 2040 0) 2041 break; 2042 } 2043 if (i == timeout) { 2044 comedi_error(dev, "eeprom write timed out"); 2045 return -ETIME; 2046 } 2047 /* update software copy of eeprom */ 2048 devpriv->eeprom_data[address] = value; 2049 2050 /* enable read/write to eeprom */ 2051 devpriv->command5_bits &= ~EEPROM_EN_BIT; 2052 udelay(1); 2053 devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); 2054 devpriv->command5_bits |= EEPROM_EN_BIT | EEPROM_WRITE_UNPROTECT_BIT; 2055 udelay(1); 2056 devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); 2057 2058 /* send write_enable instruction */ 2059 labpc_serial_out(dev, write_enable_instruction, write_length); 2060 devpriv->command5_bits &= ~EEPROM_EN_BIT; 2061 udelay(1); 2062 devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); 2063 2064 /* send write instruction */ 2065 devpriv->command5_bits |= EEPROM_EN_BIT; 2066 udelay(1); 2067 devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); 2068 labpc_serial_out(dev, write_instruction, write_length); 2069 /* send 8 bit address to write to */ 2070 labpc_serial_out(dev, address, write_length); 2071 /* write value */ 2072 labpc_serial_out(dev, value, write_length); 2073 devpriv->command5_bits &= ~EEPROM_EN_BIT; 2074 udelay(1); 2075 devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); 2076 2077 /* disable read/write to eeprom */ 2078 devpriv->command5_bits &= ~EEPROM_EN_BIT & ~EEPROM_WRITE_UNPROTECT_BIT; 2079 udelay(1); 2080 devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); 2081 2082 return 0; 2083} 2084 2085static unsigned int labpc_eeprom_read_status(struct comedi_device *dev) 2086{ 2087 unsigned int value; 2088 const int read_status_instruction = 0x5; 2089 const int write_length = 8; /* 8 bit write lengths to eeprom */ 2090 2091 /* enable read/write to eeprom */ 2092 devpriv->command5_bits &= ~EEPROM_EN_BIT; 2093 udelay(1); 2094 devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); 2095 devpriv->command5_bits |= EEPROM_EN_BIT | EEPROM_WRITE_UNPROTECT_BIT; 2096 udelay(1); 2097 devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); 2098 2099 /* send read status instruction */ 2100 labpc_serial_out(dev, read_status_instruction, write_length); 2101 /* read result */ 2102 value = labpc_serial_in(dev); 2103 2104 /* disable read/write to eeprom */ 2105 devpriv->command5_bits &= ~EEPROM_EN_BIT & ~EEPROM_WRITE_UNPROTECT_BIT; 2106 udelay(1); 2107 devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); 2108 2109 return value; 2110} 2111 2112/* writes to 8 bit calibration dacs */ 2113static void write_caldac(struct comedi_device *dev, unsigned int channel, 2114 unsigned int value) 2115{ 2116 if (value == devpriv->caldac[channel]) 2117 return; 2118 devpriv->caldac[channel] = value; 2119 2120 /* clear caldac load bit and make sure we don't write to eeprom */ 2121 devpriv->command5_bits &= 2122 ~CALDAC_LOAD_BIT & ~EEPROM_EN_BIT & ~EEPROM_WRITE_UNPROTECT_BIT; 2123 udelay(1); 2124 devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); 2125 2126 /* write 4 bit channel */ 2127 labpc_serial_out(dev, channel, 4); 2128 /* write 8 bit caldac value */ 2129 labpc_serial_out(dev, value, 8); 2130 2131 /* set and clear caldac bit to load caldac value */ 2132 devpriv->command5_bits |= CALDAC_LOAD_BIT; 2133 udelay(1); 2134 devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); 2135 devpriv->command5_bits &= ~CALDAC_LOAD_BIT; 2136 udelay(1); 2137 devpriv->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG); 2138} 2139 2140#ifdef CONFIG_COMEDI_PCI 2141static int __devinit driver_labpc_pci_probe(struct pci_dev *dev, 2142 const struct pci_device_id *ent) 2143{ 2144 return comedi_pci_auto_config(dev, driver_labpc.driver_name); 2145} 2146 2147static void __devexit driver_labpc_pci_remove(struct pci_dev *dev) 2148{ 2149 comedi_pci_auto_unconfig(dev); 2150} 2151 2152static struct pci_driver driver_labpc_pci_driver = { 2153 .id_table = labpc_pci_table, 2154 .probe = &driver_labpc_pci_probe, 2155 .remove = __devexit_p(&driver_labpc_pci_remove) 2156}; 2157 2158static int __init driver_labpc_init_module(void) 2159{ 2160 int retval; 2161 2162 retval = comedi_driver_register(&driver_labpc); 2163 if (retval < 0) 2164 return retval; 2165 2166 driver_labpc_pci_driver.name = (char *)driver_labpc.driver_name; 2167 return pci_register_driver(&driver_labpc_pci_driver); 2168} 2169 2170static void __exit driver_labpc_cleanup_module(void) 2171{ 2172 pci_unregister_driver(&driver_labpc_pci_driver); 2173 comedi_driver_unregister(&driver_labpc); 2174} 2175 2176module_init(driver_labpc_init_module); 2177module_exit(driver_labpc_cleanup_module); 2178#else 2179static int __init driver_labpc_init_module(void) 2180{ 2181 return comedi_driver_register(&driver_labpc); 2182} 2183 2184static void __exit driver_labpc_cleanup_module(void) 2185{ 2186 comedi_driver_unregister(&driver_labpc); 2187} 2188 2189module_init(driver_labpc_init_module); 2190module_exit(driver_labpc_cleanup_module); 2191#endif 2192 2193 2194MODULE_AUTHOR("Comedi http://www.comedi.org"); 2195MODULE_DESCRIPTION("Comedi low-level driver"); 2196MODULE_LICENSE("GPL"); 2197