usbduxfast.c revision e57795a1a7ebf8ac91cfb82070cf19bf01ee4ac0
1/* 2 * Copyright (C) 2004 Bernd Porr, Bernd.Porr@f2s.com 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 17 */ 18 19/* 20 * I must give credit here to Chris Baugher who 21 * wrote the driver for AT-MIO-16d. I used some parts of this 22 * driver. I also must give credits to David Brownell 23 * who supported me with the USB development. 24 * 25 * Bernd Porr 26 * 27 * 28 * Revision history: 29 * 0.9: Dropping the first data packet which seems to be from the last transfer. 30 * Buffer overflows in the FX2 are handed over to comedi. 31 * 0.92: Dropping now 4 packets. The quad buffer has to be emptied. 32 * Added insn command basically for testing. Sample rate is 33 * 1MHz/16ch=62.5kHz 34 * 0.99: Ian Abbott pointed out a bug which has been corrected. Thanks! 35 * 0.99a: added external trigger. 36 * 1.00: added firmware kernel request to the driver which fixed 37 * udev coldplug problem 38 */ 39 40#include <linux/kernel.h> 41#include <linux/firmware.h> 42#include <linux/module.h> 43#include <linux/init.h> 44#include <linux/slab.h> 45#include <linux/input.h> 46#include <linux/usb.h> 47#include <linux/smp_lock.h> 48#include <linux/fcntl.h> 49#include <linux/compiler.h> 50#include "comedi_fc.h" 51#include "../comedidev.h" 52 53 54#define DRIVER_VERSION "v1.0" 55#define DRIVER_AUTHOR "Bernd Porr, BerndPorr@f2s.com" 56#define DRIVER_DESC "USB-DUXfast, BerndPorr@f2s.com" 57#define BOARDNAME "usbduxfast" 58 59/* 60 * timeout for the USB-transfer 61 */ 62#define EZTIMEOUT 30 63 64/* 65 * constants for "firmware" upload and download 66 */ 67#define USBDUXFASTSUB_FIRMWARE 0xA0 68#define VENDOR_DIR_IN 0xC0 69#define VENDOR_DIR_OUT 0x40 70 71/* 72 * internal adresses of the 8051 processor 73 */ 74#define USBDUXFASTSUB_CPUCS 0xE600 75 76/* 77 * max lenghth of the transfer-buffer for software upload 78 */ 79#define TB_LEN 0x2000 80 81/* 82 * input endpoint number 83 */ 84#define BULKINEP 6 85 86/* 87 * endpoint for the A/D channellist: bulk OUT 88 */ 89#define CHANNELLISTEP 4 90 91/* 92 * number of channels 93 */ 94#define NUMCHANNELS 32 95 96/* 97 * size of the waveform descriptor 98 */ 99#define WAVESIZE 0x20 100 101/* 102 * size of one A/D value 103 */ 104#define SIZEADIN (sizeof(int16_t)) 105 106/* 107 * size of the input-buffer IN BYTES 108 */ 109#define SIZEINBUF 512 110 111/* 112 * 16 bytes 113 */ 114#define SIZEINSNBUF 512 115 116/* 117 * size of the buffer for the dux commands in bytes 118 */ 119#define SIZEOFDUXBUFFER 256 120 121/* 122 * number of in-URBs which receive the data: min=5 123 */ 124#define NUMOFINBUFFERSHIGH 10 125 126/* 127 * total number of usbduxfast devices 128 */ 129#define NUMUSBDUXFAST 16 130 131/* 132 * number of subdevices 133 */ 134#define N_SUBDEVICES 1 135 136/* 137 * analogue in subdevice 138 */ 139#define SUBDEV_AD 0 140 141/* 142 * min delay steps for more than one channel 143 * basically when the mux gives up ;-) 144 * 145 * steps at 30MHz in the FX2 146 */ 147#define MIN_SAMPLING_PERIOD 9 148 149/* 150 * max number of 1/30MHz delay steps 151 */ 152#define MAX_SAMPLING_PERIOD 500 153 154/* 155 * number of received packets to ignore before we start handing data 156 * over to comedi, it's quad buffering and we have to ignore 4 packets 157 */ 158#define PACKETS_TO_IGNORE 4 159 160/* 161 * comedi constants 162 */ 163static const comedi_lrange range_usbduxfast_ai_range = { 164 2, { BIP_RANGE(0.75), BIP_RANGE(0.5) } 165}; 166 167/* 168 * private structure of one subdevice 169 * 170 * this is the structure which holds all the data of this driver 171 * one sub device just now: A/D 172 */ 173struct usbduxfastsub_s { 174 int attached; /* is attached? */ 175 int probed; /* is it associated with a subdevice? */ 176 struct usb_device *usbdev; /* pointer to the usb-device */ 177 struct urb *urbIn; /* BULK-transfer handling: urb */ 178 int8_t *transfer_buffer; 179 int16_t *insnBuffer; /* input buffer for single insn */ 180 int ifnum; /* interface number */ 181 struct usb_interface *interface; /* interface structure */ 182 comedi_device *comedidev; /* comedi device for the interrupt 183 context */ 184 short int ai_cmd_running; /* asynchronous command is running */ 185 short int ai_continous; /* continous aquisition */ 186 long int ai_sample_count; /* number of samples to aquire */ 187 uint8_t *dux_commands; /* commands */ 188 int ignore; /* counter which ignores the first 189 buffers */ 190 struct semaphore sem; 191}; 192 193/* 194 * The pointer to the private usb-data of the driver 195 * is also the private data for the comedi-device. 196 * This has to be global as the usb subsystem needs 197 * global variables. The other reason is that this 198 * structure must be there _before_ any comedi 199 * command is issued. The usb subsystem must be 200 * initialised before comedi can access it. 201 */ 202static struct usbduxfastsub_s usbduxfastsub[NUMUSBDUXFAST]; 203 204static DECLARE_MUTEX(start_stop_sem); 205 206/* 207 * bulk transfers to usbduxfast 208 */ 209#define SENDADCOMMANDS 0 210#define SENDINITEP6 1 211 212static int send_dux_commands(struct usbduxfastsub_s *udfs, int cmd_type) 213{ 214 int tmp, nsent; 215 216 udfs->dux_commands[0] = cmd_type; 217 218#ifdef CONFIG_COMEDI_DEBUG 219 printk(KERN_DEBUG "comedi%d: usbduxfast: dux_commands: ", 220 udfs->comedidev->minor); 221 for (tmp = 0; tmp < SIZEOFDUXBUFFER; tmp++) 222 printk(" %02x", udfs->dux_commands[tmp]); 223 printk("\n"); 224#endif 225 226 tmp = usb_bulk_msg(udfs->usbdev, 227 usb_sndbulkpipe(udfs->usbdev, CHANNELLISTEP), 228 udfs->dux_commands, SIZEOFDUXBUFFER, &nsent, 10000); 229 if (tmp < 0) 230 printk(KERN_ERR "comedi%d: could not transmit dux_commands to" 231 "the usb-device, err=%d\n", udfs->comedidev->minor, tmp); 232 return tmp; 233} 234 235/* 236 * Stops the data acquision. 237 * It should be safe to call this function from any context. 238 */ 239static int usbduxfastsub_unlink_InURBs(struct usbduxfastsub_s *udfs) 240{ 241 int j = 0; 242 int err = 0; 243 244 if (udfs && udfs->urbIn) { 245 udfs->ai_cmd_running = 0; 246 /* waits until a running transfer is over */ 247 usb_kill_urb(udfs->urbIn); 248 j = 0; 249 } 250#ifdef CONFIG_COMEDI_DEBUG 251 printk(KERN_DEBUG "comedi: usbduxfast: unlinked InURB: res=%d\n", j); 252#endif 253 return err; 254} 255 256/* 257 * This will stop a running acquisition operation. 258 * Is called from within this driver from both the 259 * interrupt context and from comedi. 260 */ 261static int usbduxfast_ai_stop(struct usbduxfastsub_s *udfs, 262 int do_unlink) 263{ 264 int ret = 0; 265 266 if (!udfs) { 267 printk(KERN_ERR "comedi?: usbduxfast_ai_stop: udfs=NULL!\n"); 268 return -EFAULT; 269 } 270 271#ifdef CONFIG_COMEDI_DEBUG 272 printk(KERN_DEBUG "comedi: usbduxfast_ai_stop\n"); 273#endif 274 275 udfs->ai_cmd_running = 0; 276 277 if (do_unlink) 278 ret = usbduxfastsub_unlink_InURBs(udfs); /* stop aquistion */ 279 280 return ret; 281} 282 283/* 284 * This will cancel a running acquisition operation. 285 * This is called by comedi but never from inside the driver. 286 */ 287static int usbduxfast_ai_cancel(comedi_device *dev, comedi_subdevice *s) 288{ 289 struct usbduxfastsub_s *udfs; 290 int ret; 291 292 /* force unlink of all urbs */ 293#ifdef CONFIG_COMEDI_DEBUG 294 printk(KERN_DEBUG "comedi: usbduxfast_ai_cancel\n"); 295#endif 296 udfs = dev->private; 297 if (!udfs) { 298 printk(KERN_ERR "comedi: usbduxfast_ai_cancel: udfs=NULL\n"); 299 return -EFAULT; 300 } 301 down(&udfs->sem); 302 if (!udfs->probed) { 303 up(&udfs->sem); 304 return -ENODEV; 305 } 306 /* unlink */ 307 ret = usbduxfast_ai_stop(udfs, 1); 308 up(&udfs->sem); 309 310 return ret; 311} 312 313/* 314 * analogue IN 315 * interrupt service routine 316 */ 317static void usbduxfastsub_ai_Irq(struct urb *urb PT_REGS_ARG) 318{ 319 int n, err; 320 struct usbduxfastsub_s *udfs; 321 comedi_device *this_comedidev; 322 comedi_subdevice *s; 323 uint16_t *p; 324 325 /* sanity checks - is the urb there? */ 326 if (!urb) { 327 printk(KERN_ERR "comedi_: usbduxfast_: ao int-handler called " 328 "with urb=NULL!\n"); 329 return; 330 } 331 /* the context variable points to the subdevice */ 332 this_comedidev = urb->context; 333 if (!this_comedidev) { 334 printk(KERN_ERR "comedi_: usbduxfast_: urb context is a NULL " 335 "pointer!\n"); 336 return; 337 } 338 /* the private structure of the subdevice is usbduxfastsub_s */ 339 udfs = this_comedidev->private; 340 if (!udfs) { 341 printk(KERN_ERR "comedi_: usbduxfast_: private of comedi " 342 "subdev is a NULL pointer!\n"); 343 return; 344 } 345 /* are we running a command? */ 346 if (unlikely(!udfs->ai_cmd_running)) { 347 /* 348 * not running a command 349 * do not continue execution if no asynchronous command 350 * is running in particular not resubmit 351 */ 352 return; 353 } 354 355 if (unlikely(!udfs->attached)) { 356 /* no comedi device there */ 357 return; 358 } 359 /* subdevice which is the AD converter */ 360 s = this_comedidev->subdevices + SUBDEV_AD; 361 362 /* first we test if something unusual has just happened */ 363 switch (urb->status) { 364 case 0: 365 break; 366 367 /* 368 * happens after an unlink command or when the device 369 * is plugged out 370 */ 371 case -ECONNRESET: 372 case -ENOENT: 373 case -ESHUTDOWN: 374 case -ECONNABORTED: 375 /* tell this comedi */ 376 s->async->events |= COMEDI_CB_EOA; 377 s->async->events |= COMEDI_CB_ERROR; 378 comedi_event(udfs->comedidev, s); 379 /* stop the transfer w/o unlink */ 380 usbduxfast_ai_stop(udfs, 0); 381 return; 382 383 default: 384 printk("comedi%d: usbduxfast: non-zero urb status received in " 385 "ai intr context: %d\n", 386 udfs->comedidev->minor, urb->status); 387 s->async->events |= COMEDI_CB_EOA; 388 s->async->events |= COMEDI_CB_ERROR; 389 comedi_event(udfs->comedidev, s); 390 usbduxfast_ai_stop(udfs, 0); 391 return; 392 } 393 394 p = urb->transfer_buffer; 395 if (!udfs->ignore) { 396 if (!udfs->ai_continous) { 397 /* not continous, fixed number of samples */ 398 n = urb->actual_length / sizeof(uint16_t); 399 if (unlikely(udfs->ai_sample_count < n)) { 400 /* 401 * we have send only a fraction of the bytes 402 * received 403 */ 404 cfc_write_array_to_buffer(s, 405 urb->transfer_buffer, 406 udfs->ai_sample_count 407 * sizeof(uint16_t)); 408 usbduxfast_ai_stop(udfs, 0); 409 /* say comedi that the acquistion is over */ 410 s->async->events |= COMEDI_CB_EOA; 411 comedi_event(udfs->comedidev, s); 412 return; 413 } 414 udfs->ai_sample_count -= n; 415 } 416 /* write the full buffer to comedi */ 417 cfc_write_array_to_buffer(s, urb->transfer_buffer, 418 urb->actual_length); 419 420 /* tell comedi that data is there */ 421 comedi_event(udfs->comedidev, s); 422 423 } else { 424 /* ignore this packet */ 425 udfs->ignore--; 426 } 427 428 /* 429 * command is still running 430 * resubmit urb for BULK transfer 431 */ 432 urb->dev = udfs->usbdev; 433 urb->status = 0; 434 err = usb_submit_urb(urb, GFP_ATOMIC); 435 if (err < 0) { 436 printk(KERN_ERR "comedi%d: usbduxfast: urb resubm failed: %d", 437 udfs->comedidev->minor, err); 438 s->async->events |= COMEDI_CB_EOA; 439 s->async->events |= COMEDI_CB_ERROR; 440 comedi_event(udfs->comedidev, s); 441 usbduxfast_ai_stop(udfs, 0); 442 } 443} 444 445static int usbduxfastsub_start(struct usbduxfastsub_s *udfs) 446{ 447 int ret; 448 unsigned char local_transfer_buffer[16]; 449 450 /* 7f92 to zero */ 451 local_transfer_buffer[0] = 0; 452 ret = usb_control_msg(udfs->usbdev, 453 usb_sndctrlpipe(udfs->usbdev, 0), 454 USBDUXFASTSUB_FIRMWARE, /* bRequest, "Firmware" */ 455 VENDOR_DIR_OUT, /* bmRequestType */ 456 USBDUXFASTSUB_CPUCS, /* Value */ 457 0x0000, /* Index */ 458 local_transfer_buffer, /* address of the transfer buffer */ 459 1, /* Length */ 460 EZTIMEOUT); /* Timeout */ 461 if (ret < 0) { 462 printk("comedi_: usbduxfast_: control msg failed (start)\n"); 463 return ret; 464 } 465 466 return 0; 467} 468 469static int usbduxfastsub_stop(struct usbduxfastsub_s *udfs) 470{ 471 int ret; 472 unsigned char local_transfer_buffer[16]; 473 474 /* 7f92 to one */ 475 local_transfer_buffer[0] = 1; 476 ret = usb_control_msg(udfs->usbdev, 477 usb_sndctrlpipe(udfs->usbdev, 0), 478 USBDUXFASTSUB_FIRMWARE, /* bRequest, "Firmware" */ 479 VENDOR_DIR_OUT, /* bmRequestType */ 480 USBDUXFASTSUB_CPUCS, /* Value */ 481 0x0000, /* Index */ 482 local_transfer_buffer, 483 1, /* Length */ 484 EZTIMEOUT); /* Timeout */ 485 if (ret < 0) { 486 printk(KERN_ERR "comedi_: usbduxfast: control msg failed " 487 "(stop)\n"); 488 return ret; 489 } 490 491 return 0; 492} 493 494static int usbduxfastsub_upload(struct usbduxfastsub_s *udfs, 495 unsigned char *local_transfer_buffer, 496 unsigned int startAddr, unsigned int len) 497{ 498 int ret; 499 500#ifdef CONFIG_COMEDI_DEBUG 501 printk(KERN_DEBUG "comedi: usbduxfast: uploading %d bytes", len); 502 printk(KERN_DEBUG " to addr %d, first byte=%d.\n", 503 startAddr, local_transfer_buffer[0]); 504#endif 505 ret = usb_control_msg(udfs->usbdev, 506 usb_sndctrlpipe(udfs->usbdev, 0), 507 USBDUXFASTSUB_FIRMWARE, /* brequest, firmware */ 508 VENDOR_DIR_OUT, /* bmRequestType */ 509 startAddr, /* value */ 510 0x0000, /* index */ 511 local_transfer_buffer, /* our local safe buffer */ 512 len, /* length */ 513 EZTIMEOUT); /* timeout */ 514 515#ifdef CONFIG_COMEDI_DEBUG 516 printk(KERN_DEBUG "comedi_: usbduxfast: result=%d\n", ret); 517#endif 518 519 if (ret < 0) { 520 printk(KERN_ERR "comedi_: usbduxfast: uppload failed\n"); 521 return ret; 522 } 523 524 return 0; 525} 526 527int firmwareUpload(struct usbduxfastsub_s *udfs, unsigned char *firmwareBinary, 528 int sizeFirmware) 529{ 530 int ret; 531 532 if (!firmwareBinary) 533 return 0; 534 535 ret = usbduxfastsub_stop(udfs); 536 if (ret < 0) { 537 printk(KERN_ERR "comedi_: usbduxfast: can not stop firmware\n"); 538 return ret; 539 } 540 ret = usbduxfastsub_upload(udfs, firmwareBinary, 0, sizeFirmware); 541 if (ret < 0) { 542 printk(KERN_ERR "comedi_: usbduxfast: firmware upload failed\n"); 543 return ret; 544 } 545 ret = usbduxfastsub_start(udfs); 546 if (ret < 0) { 547 printk(KERN_ERR "comedi_: usbduxfast: can not start firmware\n"); 548 return ret; 549 } 550 551 return 0; 552} 553 554int usbduxfastsub_submit_InURBs(struct usbduxfastsub_s *udfs) 555{ 556 int ret; 557 558 if (!udfs) 559 return -EFAULT; 560 561 usb_fill_bulk_urb(udfs->urbIn, udfs->usbdev, 562 usb_rcvbulkpipe(udfs->usbdev, BULKINEP), 563 udfs->transfer_buffer, 564 SIZEINBUF, usbduxfastsub_ai_Irq, udfs->comedidev); 565 566#ifdef CONFIG_COMEDI_DEBUG 567 printk(KERN_DEBUG "comedi%d: usbduxfast: submitting in-urb: " 568 "0x%p,0x%p\n", udfs->comedidev->minor, udfs->urbIn->context, 569 udfs->urbIn->dev); 570#endif 571 ret = usb_submit_urb(udfs->urbIn, GFP_ATOMIC); 572 if (ret) { 573 printk(KERN_ERR "comedi_: usbduxfast: ai: usb_submit_urb error" 574 " %d\n", ret); 575 return ret; 576 } 577 return 0; 578} 579 580static int usbduxfast_ai_cmdtest(comedi_device *dev, 581 comedi_subdevice *s, comedi_cmd *cmd) 582{ 583 int err = 0, stop_mask = 0; 584 long int steps, tmp; 585 int minSamplPer; 586 struct usbduxfastsub_s *udfs = dev->private; 587 588 if (!udfs->probed) 589 return -ENODEV; 590 591#ifdef CONFIG_COMEDI_DEBUG 592 printk(KERN_DEBUG "comedi%d: usbduxfast_ai_cmdtest\n", dev->minor); 593 printk(KERN_DEBUG "comedi%d: usbduxfast: convert_arg=%u " 594 "scan_begin_arg=%u\n", 595 dev->minor, cmd->convert_arg, cmd->scan_begin_arg); 596#endif 597 /* step 1: make sure trigger sources are trivially valid */ 598 599 tmp = cmd->start_src; 600 cmd->start_src &= TRIG_NOW | TRIG_EXT | TRIG_INT; 601 if (!cmd->start_src || tmp != cmd->start_src) 602 err++; 603 604 tmp = cmd->scan_begin_src; 605 cmd->scan_begin_src &= TRIG_TIMER | TRIG_FOLLOW | TRIG_EXT; 606 if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src) 607 err++; 608 609 tmp = cmd->convert_src; 610 cmd->convert_src &= TRIG_TIMER | TRIG_EXT; 611 if (!cmd->convert_src || tmp != cmd->convert_src) 612 err++; 613 614 tmp = cmd->scan_end_src; 615 cmd->scan_end_src &= TRIG_COUNT; 616 if (!cmd->scan_end_src || tmp != cmd->scan_end_src) 617 err++; 618 619 tmp = cmd->stop_src; 620 stop_mask = TRIG_COUNT | TRIG_NONE; 621 cmd->stop_src &= stop_mask; 622 if (!cmd->stop_src || tmp != cmd->stop_src) 623 err++; 624 625 if (err) 626 return 1; 627 628 /* 629 * step 2: make sure trigger sources are unique and mutually compatible 630 */ 631 632 if (cmd->start_src != TRIG_NOW && 633 cmd->start_src != TRIG_EXT && cmd->start_src != TRIG_INT) 634 err++; 635 if (cmd->scan_begin_src != TRIG_TIMER && 636 cmd->scan_begin_src != TRIG_FOLLOW && 637 cmd->scan_begin_src != TRIG_EXT) 638 err++; 639 if (cmd->convert_src != TRIG_TIMER && cmd->convert_src != TRIG_EXT) 640 err++; 641 if (cmd->stop_src != TRIG_COUNT && 642 cmd->stop_src != TRIG_EXT && cmd->stop_src != TRIG_NONE) 643 err++; 644 645 /* can't have external stop and start triggers at once */ 646 if (cmd->start_src == TRIG_EXT && cmd->stop_src == TRIG_EXT) 647 err++; 648 649 if (err) 650 return 2; 651 652 /* step 3: make sure arguments are trivially compatible */ 653 654 if (cmd->start_src == TRIG_NOW && cmd->start_arg != 0) { 655 cmd->start_arg = 0; 656 err++; 657 } 658 659 if (!cmd->chanlist_len) 660 err++; 661 662 if (cmd->scan_end_arg != cmd->chanlist_len) { 663 cmd->scan_end_arg = cmd->chanlist_len; 664 err++; 665 } 666 667 if (cmd->chanlist_len == 1) 668 minSamplPer = 1; 669 else 670 minSamplPer = MIN_SAMPLING_PERIOD; 671 672 if (cmd->convert_src == TRIG_TIMER) { 673 steps = cmd->convert_arg * 30; 674 if (steps < (minSamplPer * 1000)) 675 steps = minSamplPer * 1000; 676 677 if (steps > (MAX_SAMPLING_PERIOD * 1000)) 678 steps = MAX_SAMPLING_PERIOD * 1000; 679 680 /* calc arg again */ 681 tmp = steps / 30; 682 if (cmd->convert_arg != tmp) { 683 cmd->convert_arg = tmp; 684 err++; 685 } 686 } 687 688 if (cmd->scan_begin_src == TRIG_TIMER) 689 err++; 690 691 /* stop source */ 692 switch (cmd->stop_src) { 693 case TRIG_COUNT: 694 if (!cmd->stop_arg) { 695 cmd->stop_arg = 1; 696 err++; 697 } 698 break; 699 case TRIG_NONE: 700 if (cmd->stop_arg != 0) { 701 cmd->stop_arg = 0; 702 err++; 703 } 704 break; 705 /* 706 * TRIG_EXT doesn't care since it doesn't trigger 707 * off a numbered channel 708 */ 709 default: 710 break; 711 } 712 713 if (err) 714 return 3; 715 716 /* step 4: fix up any arguments */ 717 718 return 0; 719 720} 721 722static int usbduxfast_ai_inttrig(comedi_device *dev, 723 comedi_subdevice *s, unsigned int trignum) 724{ 725 int ret; 726 struct usbduxfastsub_s *udfs = dev->private; 727 728 if (!udfs) 729 return -EFAULT; 730 731 down(&udfs->sem); 732 if (!udfs->probed) { 733 up(&udfs->sem); 734 return -ENODEV; 735 } 736#ifdef CONFIG_COMEDI_DEBUG 737 printk(KERN_DEBUG "comedi%d: usbduxfast_ai_inttrig\n", dev->minor); 738#endif 739 740 if (trignum != 0) { 741 printk(KERN_ERR "comedi%d: usbduxfast_ai_inttrig: invalid" 742 " trignum\n", dev->minor); 743 up(&udfs->sem); 744 return -EINVAL; 745 } 746 if (!udfs->ai_cmd_running) { 747 udfs->ai_cmd_running = 1; 748 ret = usbduxfastsub_submit_InURBs(udfs); 749 if (ret < 0) { 750 printk(KERN_ERR "comedi%d: usbduxfast_ai_inttrig: " 751 "urbSubmit: err=%d\n", dev->minor, ret); 752 udfs->ai_cmd_running = 0; 753 up(&udfs->sem); 754 return ret; 755 } 756 s->async->inttrig = NULL; 757 } else { 758 printk(KERN_ERR "comedi%d: ai_inttrig but acqu is already" 759 " running\n", dev->minor); 760 } 761 up(&udfs->sem); 762 return 1; 763} 764 765/* 766 * offsets for the GPIF bytes 767 * the first byte is the command byte 768 */ 769#define LENBASE (1+0x00) 770#define OPBASE (1+0x08) 771#define OUTBASE (1+0x10) 772#define LOGBASE (1+0x18) 773 774static int usbduxfast_ai_cmd(comedi_device *dev, comedi_subdevice *s) 775{ 776 comedi_cmd *cmd = &s->async->cmd; 777 unsigned int chan, gain, rngmask = 0xff; 778 int i, j, ret; 779 struct usbduxfastsub_s *udfs; 780 int result; 781 long steps, steps_tmp; 782 783#ifdef CONFIG_COMEDI_DEBUG 784 printk(KERN_DEBUG "comedi%d: usbduxfast_ai_cmd\n", dev->minor); 785#endif 786 udfs = dev->private; 787 if (!udfs) 788 return -EFAULT; 789 790 down(&udfs->sem); 791 if (!udfs->probed) { 792 up(&udfs->sem); 793 return -ENODEV; 794 } 795 if (udfs->ai_cmd_running) { 796 printk(KERN_ERR "comedi%d: ai_cmd not possible. Another ai_cmd" 797 " is running.\n", dev->minor); 798 up(&udfs->sem); 799 return -EBUSY; 800 } 801 /* set current channel of the running aquisition to zero */ 802 s->async->cur_chan = 0; 803 804 /* 805 * ignore the first buffers from the device if there 806 * is an error condition 807 */ 808 udfs->ignore = PACKETS_TO_IGNORE; 809 810 if (cmd->chanlist_len > 0) { 811 gain = CR_RANGE(cmd->chanlist[0]); 812 for (i = 0; i < cmd->chanlist_len; ++i) { 813 chan = CR_CHAN(cmd->chanlist[i]); 814 if (chan != i) { 815 printk(KERN_ERR "comedi%d: cmd is accepting " 816 "only consecutive channels.\n", 817 dev->minor); 818 up(&udfs->sem); 819 return -EINVAL; 820 } 821 if ((gain != CR_RANGE(cmd->chanlist[i])) 822 && (cmd->chanlist_len > 3)) { 823 printk(KERN_ERR "comedi%d: the gain must be" 824 " the same for all channels.\n", 825 dev->minor); 826 up(&udfs->sem); 827 return -EINVAL; 828 } 829 if (i >= NUMCHANNELS) { 830 printk(KERN_ERR "comedi%d: channel list too" 831 " long\n", dev->minor); 832 break; 833 } 834 } 835 } 836 steps = 0; 837 if (cmd->scan_begin_src == TRIG_TIMER) { 838 printk(KERN_ERR "comedi%d: usbduxfast: " 839 "scan_begin_src==TRIG_TIMER not valid.\n", dev->minor); 840 up(&udfs->sem); 841 return -EINVAL; 842 } 843 if (cmd->convert_src == TRIG_TIMER) 844 steps = (cmd->convert_arg * 30) / 1000; 845 846 if ((steps < MIN_SAMPLING_PERIOD) && (cmd->chanlist_len != 1)) { 847 printk(KERN_ERR "comedi%d: usbduxfast: ai_cmd: steps=%ld, " 848 "scan_begin_arg=%d. Not properly tested by cmdtest?\n", 849 dev->minor, steps, cmd->scan_begin_arg); 850 up(&udfs->sem); 851 return -EINVAL; 852 } 853 if (steps > MAX_SAMPLING_PERIOD) { 854 printk(KERN_ERR "comedi%d: usbduxfast: ai_cmd: sampling rate " 855 "too low.\n", dev->minor); 856 up(&udfs->sem); 857 return -EINVAL; 858 } 859 if ((cmd->start_src == TRIG_EXT) && (cmd->chanlist_len != 1) 860 && (cmd->chanlist_len != 16)) { 861 printk(KERN_ERR "comedi%d: usbduxfast: ai_cmd: TRIG_EXT only" 862 " with 1 or 16 channels possible.\n", dev->minor); 863 up(&udfs->sem); 864 return -EINVAL; 865 } 866#ifdef CONFIG_COMEDI_DEBUG 867 printk(KERN_DEBUG "comedi%d: usbduxfast: steps=%ld, convert_arg=%u\n", 868 dev->minor, steps, cmd->convert_arg); 869#endif 870 871 switch (cmd->chanlist_len) { 872 case 1: 873 /* 874 * one channel 875 */ 876 877 if (CR_RANGE(cmd->chanlist[0]) > 0) 878 rngmask = 0xff - 0x04; 879 else 880 rngmask = 0xff; 881 882 /* 883 * for external trigger: looping in this state until 884 * the RDY0 pin becomes zero 885 */ 886 887 /* we loop here until ready has been set */ 888 if (cmd->start_src == TRIG_EXT) { 889 /* branch back to state 0 */ 890 udfs->dux_commands[LENBASE+0] = 0x01; 891 /* deceision state w/o data */ 892 udfs->dux_commands[OPBASE+0] = 0x01; 893 udfs->dux_commands[OUTBASE+0] = 0xFF & rngmask; 894 /* RDY0 = 0 */ 895 udfs->dux_commands[LOGBASE+0] = 0x00; 896 } else { /* we just proceed to state 1 */ 897 udfs->dux_commands[LENBASE+0] = 1; 898 udfs->dux_commands[OPBASE+0] = 0; 899 udfs->dux_commands[OUTBASE+0] = 0xFF & rngmask; 900 udfs->dux_commands[LOGBASE+0] = 0; 901 } 902 903 if (steps < MIN_SAMPLING_PERIOD) { 904 /* for fast single channel aqu without mux */ 905 if (steps <= 1) { 906 /* 907 * we just stay here at state 1 and rexecute 908 * the same state this gives us 30MHz sampling 909 * rate 910 */ 911 912 /* branch back to state 1 */ 913 udfs->dux_commands[LENBASE+1] = 0x89; 914 /* deceision state with data */ 915 udfs->dux_commands[OPBASE+1] = 0x03; 916 udfs->dux_commands[OUTBASE+1] = 0xFF & rngmask; 917 /* doesn't matter */ 918 udfs->dux_commands[LOGBASE+1] = 0xFF; 919 } else { 920 /* 921 * we loop through two states: data and delay 922 * max rate is 15MHz 923 */ 924 udfs->dux_commands[LENBASE+1] = steps - 1; 925 /* data */ 926 udfs->dux_commands[OPBASE+1] = 0x02; 927 udfs->dux_commands[OUTBASE+1] = 0xFF & rngmask; 928 /* doesn't matter */ 929 udfs->dux_commands[LOGBASE+1] = 0; 930 /* branch back to state 1 */ 931 udfs->dux_commands[LENBASE+2] = 0x09; 932 /* deceision state w/o data */ 933 udfs->dux_commands[OPBASE+2] = 0x01; 934 udfs->dux_commands[OUTBASE+2] = 0xFF & rngmask; 935 /* doesn't matter */ 936 udfs->dux_commands[LOGBASE+2] = 0xFF; 937 } 938 } else { 939 /* 940 * we loop through 3 states: 2x delay and 1x data 941 * this gives a min sampling rate of 60kHz 942 */ 943 944 /* we have 1 state with duration 1 */ 945 steps = steps - 1; 946 947 /* do the first part of the delay */ 948 udfs->dux_commands[LENBASE+1] = steps / 2; 949 udfs->dux_commands[OPBASE+1] = 0; 950 udfs->dux_commands[OUTBASE+1] = 0xFF & rngmask; 951 udfs->dux_commands[LOGBASE+1] = 0; 952 953 /* and the second part */ 954 udfs->dux_commands[LENBASE+2] = steps - steps / 2; 955 udfs->dux_commands[OPBASE+2] = 0; 956 udfs->dux_commands[OUTBASE+2] = 0xFF & rngmask; 957 udfs->dux_commands[LOGBASE+2] = 0; 958 959 /* get the data and branch back */ 960 961 /* branch back to state 1 */ 962 udfs->dux_commands[LENBASE+3] = 0x09; 963 /* deceision state w data */ 964 udfs->dux_commands[OPBASE+3] = 0x03; 965 udfs->dux_commands[OUTBASE+3] = 0xFF & rngmask; 966 /* doesn't matter */ 967 udfs->dux_commands[LOGBASE+3] = 0xFF; 968 } 969 break; 970 971 case 2: 972 /* 973 * two channels 974 * commit data to the FIFO 975 */ 976 977 if (CR_RANGE(cmd->chanlist[0]) > 0) 978 rngmask = 0xff - 0x04; 979 else 980 rngmask = 0xff; 981 982 udfs->dux_commands[LENBASE+0] = 1; 983 /* data */ 984 udfs->dux_commands[OPBASE+0] = 0x02; 985 udfs->dux_commands[OUTBASE+0] = 0xFF & rngmask; 986 udfs->dux_commands[LOGBASE+0] = 0; 987 988 /* we have 1 state with duration 1: state 0 */ 989 steps_tmp = steps - 1; 990 991 if (CR_RANGE(cmd->chanlist[1]) > 0) 992 rngmask = 0xff - 0x04; 993 else 994 rngmask = 0xff; 995 996 /* do the first part of the delay */ 997 udfs->dux_commands[LENBASE+1] = steps_tmp / 2; 998 udfs->dux_commands[OPBASE+1] = 0; 999 /* count */ 1000 udfs->dux_commands[OUTBASE+1] = 0xFE & rngmask; 1001 udfs->dux_commands[LOGBASE+1] = 0; 1002 1003 /* and the second part */ 1004 udfs->dux_commands[LENBASE+2] = steps_tmp - steps_tmp / 2; 1005 udfs->dux_commands[OPBASE+2] = 0; 1006 udfs->dux_commands[OUTBASE+2] = 0xFF & rngmask; 1007 udfs->dux_commands[LOGBASE+2] = 0; 1008 1009 udfs->dux_commands[LENBASE+3] = 1; 1010 /* data */ 1011 udfs->dux_commands[OPBASE+3] = 0x02; 1012 udfs->dux_commands[OUTBASE+3] = 0xFF & rngmask; 1013 udfs->dux_commands[LOGBASE+3] = 0; 1014 1015 /* 1016 * we have 2 states with duration 1: step 6 and 1017 * the IDLE state 1018 */ 1019 steps_tmp = steps - 2; 1020 1021 if (CR_RANGE(cmd->chanlist[0]) > 0) 1022 rngmask = 0xff - 0x04; 1023 else 1024 rngmask = 0xff; 1025 1026 /* do the first part of the delay */ 1027 udfs->dux_commands[LENBASE+4] = steps_tmp / 2; 1028 udfs->dux_commands[OPBASE+4] = 0; 1029 /* reset */ 1030 udfs->dux_commands[OUTBASE+4] = (0xFF - 0x02) & rngmask; 1031 udfs->dux_commands[LOGBASE+4] = 0; 1032 1033 /* and the second part */ 1034 udfs->dux_commands[LENBASE+5] = steps_tmp - steps_tmp / 2; 1035 udfs->dux_commands[OPBASE+5] = 0; 1036 udfs->dux_commands[OUTBASE+5] = 0xFF & rngmask; 1037 udfs->dux_commands[LOGBASE+5] = 0; 1038 1039 udfs->dux_commands[LENBASE+6] = 1; 1040 udfs->dux_commands[OPBASE+6] = 0; 1041 udfs->dux_commands[OUTBASE+6] = 0xFF & rngmask; 1042 udfs->dux_commands[LOGBASE+6] = 0; 1043 break; 1044 1045 case 3: 1046 /* 1047 * three channels 1048 */ 1049 for (j = 0; j < 1; j++) { 1050 if (CR_RANGE(cmd->chanlist[j]) > 0) 1051 rngmask = 0xff - 0x04; 1052 else 1053 rngmask = 0xff; 1054 /* 1055 * commit data to the FIFO and do the first part 1056 * of the delay 1057 */ 1058 udfs->dux_commands[LENBASE+j*2] = steps / 2; 1059 /* data */ 1060 udfs->dux_commands[OPBASE+j*2] = 0x02; 1061 /* no change */ 1062 udfs->dux_commands[OUTBASE+j*2] = 0xFF & rngmask; 1063 udfs->dux_commands[LOGBASE+j*2] = 0; 1064 1065 if (CR_RANGE(cmd->chanlist[j + 1]) > 0) 1066 rngmask = 0xff - 0x04; 1067 else 1068 rngmask = 0xff; 1069 1070 /* do the second part of the delay */ 1071 udfs->dux_commands[LENBASE+j*2+1] = steps - steps / 2; 1072 /* no data */ 1073 udfs->dux_commands[OPBASE+j*2+1] = 0; 1074 /* count */ 1075 udfs->dux_commands[OUTBASE+j*2+1] = 0xFE & rngmask; 1076 udfs->dux_commands[LOGBASE+j*2+1] = 0; 1077 } 1078 1079 /* 2 steps with duration 1: the idele step and step 6: */ 1080 steps_tmp = steps - 2; 1081 1082 /* commit data to the FIFO and do the first part of the delay */ 1083 udfs->dux_commands[LENBASE+4] = steps_tmp / 2; 1084 /* data */ 1085 udfs->dux_commands[OPBASE+4] = 0x02; 1086 udfs->dux_commands[OUTBASE+4] = 0xFF & rngmask; 1087 udfs->dux_commands[LOGBASE+4] = 0; 1088 1089 if (CR_RANGE(cmd->chanlist[0]) > 0) 1090 rngmask = 0xff - 0x04; 1091 else 1092 rngmask = 0xff; 1093 1094 /* do the second part of the delay */ 1095 udfs->dux_commands[LENBASE+5] = steps_tmp - steps_tmp / 2; 1096 /* no data */ 1097 udfs->dux_commands[OPBASE+5] = 0; 1098 /* reset */ 1099 udfs->dux_commands[OUTBASE+5] = (0xFF - 0x02) & rngmask; 1100 udfs->dux_commands[LOGBASE+5] = 0; 1101 1102 udfs->dux_commands[LENBASE+6] = 1; 1103 udfs->dux_commands[OPBASE+6] = 0; 1104 udfs->dux_commands[OUTBASE+6] = 0xFF & rngmask; 1105 udfs->dux_commands[LOGBASE+6] = 0; 1106 1107 case 16: 1108 if (CR_RANGE(cmd->chanlist[0]) > 0) 1109 rngmask = 0xff - 0x04; 1110 else 1111 rngmask = 0xff; 1112 1113 if (cmd->start_src == TRIG_EXT) { 1114 /* 1115 * we loop here until ready has been set 1116 */ 1117 1118 /* branch back to state 0 */ 1119 udfs->dux_commands[LENBASE+0] = 0x01; 1120 /* deceision state w/o data */ 1121 udfs->dux_commands[OPBASE+0] = 0x01; 1122 /* reset */ 1123 udfs->dux_commands[OUTBASE+0] = (0xFF-0x02) & rngmask; 1124 /* RDY0 = 0 */ 1125 udfs->dux_commands[LOGBASE+0] = 0x00; 1126 } else { 1127 /* 1128 * we just proceed to state 1 1129 */ 1130 1131 /* 30us reset pulse */ 1132 udfs->dux_commands[LENBASE+0] = 255; 1133 udfs->dux_commands[OPBASE+0] = 0; 1134 /* reset */ 1135 udfs->dux_commands[OUTBASE+0] = (0xFF-0x02) & rngmask; 1136 udfs->dux_commands[LOGBASE+0] = 0; 1137 } 1138 1139 /* commit data to the FIFO */ 1140 udfs->dux_commands[LENBASE+1] = 1; 1141 /* data */ 1142 udfs->dux_commands[OPBASE+1] = 0x02; 1143 udfs->dux_commands[OUTBASE+1] = 0xFF & rngmask; 1144 udfs->dux_commands[LOGBASE+1] = 0; 1145 1146 /* we have 2 states with duration 1 */ 1147 steps = steps - 2; 1148 1149 /* do the first part of the delay */ 1150 udfs->dux_commands[LENBASE+2] = steps / 2; 1151 udfs->dux_commands[OPBASE+2] = 0; 1152 udfs->dux_commands[OUTBASE+2] = 0xFE & rngmask; 1153 udfs->dux_commands[LOGBASE+2] = 0; 1154 1155 /* and the second part */ 1156 udfs->dux_commands[LENBASE+3] = steps - steps / 2; 1157 udfs->dux_commands[OPBASE+3] = 0; 1158 udfs->dux_commands[OUTBASE+3] = 0xFF & rngmask; 1159 udfs->dux_commands[LOGBASE+3] = 0; 1160 1161 /* branch back to state 1 */ 1162 udfs->dux_commands[LENBASE+4] = 0x09; 1163 /* deceision state w/o data */ 1164 udfs->dux_commands[OPBASE+4] = 0x01; 1165 udfs->dux_commands[OUTBASE+4] = 0xFF & rngmask; 1166 /* doesn't matter */ 1167 udfs->dux_commands[LOGBASE+4] = 0xFF; 1168 1169 break; 1170 1171 default: 1172 printk(KERN_ERR "comedi %d: unsupported combination of " 1173 "channels\n", dev->minor); 1174 up(&udfs->sem); 1175 return -EFAULT; 1176 } 1177 1178#ifdef CONFIG_COMEDI_DEBUG 1179 printk(KERN_DEBUG "comedi %d: sending commands to the usb device\n", 1180 dev->minor); 1181#endif 1182 /* 0 means that the AD commands are sent */ 1183 result = send_dux_commands(udfs, SENDADCOMMANDS); 1184 if (result < 0) { 1185 printk(KERN_ERR "comedi%d: adc command could not be submitted." 1186 "Aborting...\n", dev->minor); 1187 up(&udfs->sem); 1188 return result; 1189 } 1190 if (cmd->stop_src == TRIG_COUNT) { 1191 udfs->ai_sample_count = cmd->stop_arg * cmd->scan_end_arg; 1192 if (udfs->ai_sample_count < 1) { 1193 printk(KERN_ERR "comedi%d: " 1194 "(cmd->stop_arg)*(cmd->scan_end_arg)<1, " 1195 "aborting.\n", dev->minor); 1196 up(&udfs->sem); 1197 return -EFAULT; 1198 } 1199 udfs->ai_continous = 0; 1200 } else { 1201 /* continous aquisition */ 1202 udfs->ai_continous = 1; 1203 udfs->ai_sample_count = 0; 1204 } 1205 1206 if ((cmd->start_src == TRIG_NOW) || (cmd->start_src == TRIG_EXT)) { 1207 /* enable this acquisition operation */ 1208 udfs->ai_cmd_running = 1; 1209 ret = usbduxfastsub_submit_InURBs(udfs); 1210 if (ret < 0) { 1211 udfs->ai_cmd_running = 0; 1212 /* fixme: unlink here?? */ 1213 up(&udfs->sem); 1214 return ret; 1215 } 1216 s->async->inttrig = NULL; 1217 } else { 1218 /* 1219 * TRIG_INT 1220 * don't enable the acquision operation 1221 * wait for an internal signal 1222 */ 1223 s->async->inttrig = usbduxfast_ai_inttrig; 1224 } 1225 up(&udfs->sem); 1226 1227 return 0; 1228} 1229 1230/* 1231 * Mode 0 is used to get a single conversion on demand. 1232 */ 1233static int usbduxfast_ai_insn_read(comedi_device *dev, 1234 comedi_subdevice *s, comedi_insn *insn, lsampl_t *data) 1235{ 1236 int i, j, n, actual_length; 1237 int chan, range, rngmask; 1238 int err; 1239 struct usbduxfastsub_s *udfs; 1240 1241 udfs = dev->private; 1242 if (!udfs) { 1243 printk(KERN_ERR "comedi%d: ai_insn_read: no usb dev.\n", 1244 dev->minor); 1245 return -ENODEV; 1246 } 1247#ifdef CONFIG_COMEDI_DEBUG 1248 printk(KERN_DEBUG "comedi%d: ai_insn_read, insn->n=%d, " 1249 "insn->subdev=%d\n", dev->minor, insn->n, insn->subdev); 1250#endif 1251 down(&udfs->sem); 1252 if (!udfs->probed) { 1253 up(&udfs->sem); 1254 return -ENODEV; 1255 } 1256 if (udfs->ai_cmd_running) { 1257 printk(KERN_ERR "comedi%d: ai_insn_read not possible. Async " 1258 "Command is running.\n", dev->minor); 1259 up(&udfs->sem); 1260 return -EBUSY; 1261 } 1262 /* sample one channel */ 1263 chan = CR_CHAN(insn->chanspec); 1264 range = CR_RANGE(insn->chanspec); 1265 /* set command for the first channel */ 1266 1267 if (range > 0) 1268 rngmask = 0xff - 0x04; 1269 else 1270 rngmask = 0xff; 1271 1272 /* commit data to the FIFO */ 1273 udfs->dux_commands[LENBASE+0] = 1; 1274 /* data */ 1275 udfs->dux_commands[OPBASE+0] = 0x02; 1276 udfs->dux_commands[OUTBASE+0] = 0xFF & rngmask; 1277 udfs->dux_commands[LOGBASE+0] = 0; 1278 1279 /* do the first part of the delay */ 1280 udfs->dux_commands[LENBASE+1] = 12; 1281 udfs->dux_commands[OPBASE+1] = 0; 1282 udfs->dux_commands[OUTBASE+1] = 0xFE & rngmask; 1283 udfs->dux_commands[LOGBASE+1] = 0; 1284 1285 udfs->dux_commands[LENBASE+2] = 1; 1286 udfs->dux_commands[OPBASE+2] = 0; 1287 udfs->dux_commands[OUTBASE+2] = 0xFE & rngmask; 1288 udfs->dux_commands[LOGBASE+2] = 0; 1289 1290 udfs->dux_commands[LENBASE+3] = 1; 1291 udfs->dux_commands[OPBASE+3] = 0; 1292 udfs->dux_commands[OUTBASE+3] = 0xFE & rngmask; 1293 udfs->dux_commands[LOGBASE+3] = 0; 1294 1295 udfs->dux_commands[LENBASE+4] = 1; 1296 udfs->dux_commands[OPBASE+4] = 0; 1297 udfs->dux_commands[OUTBASE+4] = 0xFE & rngmask; 1298 udfs->dux_commands[LOGBASE+4] = 0; 1299 1300 /* second part */ 1301 udfs->dux_commands[LENBASE+5] = 12; 1302 udfs->dux_commands[OPBASE+5] = 0; 1303 udfs->dux_commands[OUTBASE+5] = 0xFF & rngmask; 1304 udfs->dux_commands[LOGBASE+5] = 0; 1305 1306 udfs->dux_commands[LENBASE+6] = 1; 1307 udfs->dux_commands[OPBASE+6] = 0; 1308 udfs->dux_commands[OUTBASE+6] = 0xFF & rngmask; 1309 udfs->dux_commands[LOGBASE+0] = 0; 1310 1311#ifdef CONFIG_COMEDI_DEBUG 1312 printk(KERN_DEBUG "comedi %d: sending commands to the usb device\n", 1313 dev->minor); 1314#endif 1315 /* 0 means that the AD commands are sent */ 1316 err = send_dux_commands(udfs, SENDADCOMMANDS); 1317 if (err < 0) { 1318 printk(KERN_ERR "comedi%d: adc command could not be submitted." 1319 "Aborting...\n", dev->minor); 1320 up(&udfs->sem); 1321 return err; 1322 } 1323#ifdef CONFIG_COMEDI_DEBUG 1324 printk(KERN_DEBUG "comedi%d: usbduxfast: submitting in-urb: " 1325 "0x%p,0x%p\n", udfs->comedidev->minor, udfs->urbIn->context, 1326 udfs->urbIn->dev); 1327#endif 1328 for (i = 0; i < PACKETS_TO_IGNORE; i++) { 1329 err = usb_bulk_msg(udfs->usbdev, 1330 usb_rcvbulkpipe(udfs->usbdev, BULKINEP), 1331 udfs->transfer_buffer, SIZEINBUF, 1332 &actual_length, 10000); 1333 if (err < 0) { 1334 printk(KERN_ERR "comedi%d: insn timeout. No data.\n", 1335 dev->minor); 1336 up(&udfs->sem); 1337 return err; 1338 } 1339 } 1340 /* data points */ 1341 for (i = 0; i < insn->n;) { 1342 err = usb_bulk_msg(udfs->usbdev, 1343 usb_rcvbulkpipe(udfs->usbdev, BULKINEP), 1344 udfs->transfer_buffer, SIZEINBUF, 1345 &actual_length, 10000); 1346 if (err < 0) { 1347 printk(KERN_ERR "comedi%d: insn data error: %d\n", 1348 dev->minor, err); 1349 up(&udfs->sem); 1350 return err; 1351 } 1352 n = actual_length / sizeof(uint16_t); 1353 if ((n % 16) != 0) { 1354 printk(KERN_ERR "comedi%d: insn data packet " 1355 "corrupted.\n", dev->minor); 1356 up(&udfs->sem); 1357 return -EINVAL; 1358 } 1359 for (j = chan; (j < n) && (i < insn->n); j = j + 16) { 1360 data[i] = ((uint16_t *) (udfs->transfer_buffer))[j]; 1361 i++; 1362 } 1363 } 1364 up(&udfs->sem); 1365 return i; 1366} 1367 1368static unsigned hex2unsigned(char *h) 1369{ 1370 unsigned hi, lo; 1371 1372 if (h[0] > '9') 1373 hi = h[0] - 'A' + 0x0a; 1374 else 1375 hi = h[0] - '0'; 1376 1377 if (h[1] > '9') 1378 lo = h[1] - 'A' + 0x0a; 1379 else 1380 lo = h[1] - '0'; 1381 1382 return hi * 0x10 + lo; 1383} 1384 1385/* for FX2 */ 1386#define FIRMWARE_MAX_LEN 0x2000 1387 1388/* 1389 * taken from David Brownell's fxload and adjusted for this driver 1390 */ 1391static int read_firmware(struct usbduxfastsub_s *udfs, const void *firmwarePtr, 1392 long size) 1393{ 1394 int i = 0; 1395 unsigned char *fp = (char *)firmwarePtr; 1396 unsigned char *firmwareBinary; 1397 int res = 0; 1398 int maxAddr = 0; 1399 1400 firmwareBinary = kmalloc(FIRMWARE_MAX_LEN, GFP_KERNEL); 1401 if (!firmwareBinary) { 1402 printk(KERN_ERR "comedi_: usbduxfast: mem alloc for firmware " 1403 " failed\n"); 1404 return -ENOMEM; 1405 } 1406 1407 for (;;) { 1408 char buf[256], *cp; 1409 char type; 1410 int len; 1411 int idx, off; 1412 int j = 0; 1413 1414 /* get one line */ 1415 while ((i < size) && (fp[i] != 13) && (fp[i] != 10)) { 1416 buf[j] = fp[i]; 1417 i++; 1418 j++; 1419 if (j >= sizeof(buf)) { 1420 printk(KERN_ERR "comedi_: usbduxfast: bogus " 1421 "firmware file!\n"); 1422 kfree(firmwareBinary); 1423 return -1; 1424 } 1425 } 1426 /* get rid of LF/CR/... */ 1427 while ((i < size) && ((fp[i] == 13) || (fp[i] == 10) 1428 || (fp[i] == 0))) 1429 i++; 1430 1431 buf[j] = 0; 1432 /* printk("comedi_: buf=%s\n",buf); */ 1433 1434 /* 1435 * EXTENSION: "# comment-till-end-of-line", 1436 * for copyrights etc 1437 */ 1438 if (buf[0] == '#') 1439 continue; 1440 1441 if (buf[0] != ':') { 1442 printk(KERN_ERR "comedi_: usbduxfast: upload: not an " 1443 "ihex record: %s", buf); 1444 kfree(firmwareBinary); 1445 return -EFAULT; 1446 } 1447 1448 /* Read the length field (up to 16 bytes) */ 1449 len = hex2unsigned(buf + 1); 1450 1451 /* Read the target offset */ 1452 off = (hex2unsigned(buf + 3) * 0x0100) + hex2unsigned(buf + 5); 1453 1454 if ((off + len) > maxAddr) 1455 maxAddr = off + len; 1456 1457 if (maxAddr >= FIRMWARE_MAX_LEN) { 1458 printk(KERN_ERR "comedi_: usbduxfast: firmware upload " 1459 "goes beyond FX2 RAM boundaries."); 1460 kfree(firmwareBinary); 1461 return -EFAULT; 1462 } 1463 /* printk("comedi_: usbduxfast: off=%x, len=%x:",off,len); */ 1464 1465 /* Read the record type */ 1466 type = hex2unsigned(buf + 7); 1467 1468 /* If this is an EOF record, then make it so. */ 1469 if (type == 1) 1470 break; 1471 1472 if (type != 0) { 1473 printk(KERN_ERR "comedi_: usbduxfast: unsupported " 1474 "record type: %u\n", type); 1475 kfree(firmwareBinary); 1476 return -EFAULT; 1477 } 1478 1479 for (idx = 0, cp = buf + 9; idx < len; idx += 1, cp += 2) { 1480 firmwareBinary[idx + off] = hex2unsigned(cp); 1481 /* printk("%02x ",firmwareBinary[idx+off]); */ 1482 } 1483 1484 /* printk("\n"); */ 1485 1486 if (i >= size) { 1487 printk(KERN_ERR "comedi_: usbduxfast: unexpected end " 1488 "of hex file\n"); 1489 break; 1490 } 1491 1492 } 1493 res = firmwareUpload(udfs, firmwareBinary, maxAddr + 1); 1494 kfree(firmwareBinary); 1495 return res; 1496} 1497 1498static void tidy_up(struct usbduxfastsub_s *udfs) 1499{ 1500#ifdef CONFIG_COMEDI_DEBUG 1501 printk(KERN_DEBUG "comedi_: usbduxfast: tiding up\n"); 1502#endif 1503 1504 if (!udfs) 1505 return; 1506 1507 /* shows the usb subsystem that the driver is down */ 1508 if (udfs->interface) 1509 usb_set_intfdata(udfs->interface, NULL); 1510 1511 udfs->probed = 0; 1512 1513 if (udfs->urbIn) { 1514 /* waits until a running transfer is over */ 1515 usb_kill_urb(udfs->urbIn); 1516 1517 kfree(udfs->transfer_buffer); 1518 udfs->transfer_buffer = NULL; 1519 1520 usb_free_urb(udfs->urbIn); 1521 udfs->urbIn = NULL; 1522 } 1523 1524 kfree(udfs->insnBuffer); 1525 udfs->insnBuffer = NULL; 1526 1527 kfree(udfs->dux_commands); 1528 udfs->dux_commands = NULL; 1529 1530 udfs->ai_cmd_running = 0; 1531} 1532 1533static void usbduxfast_firmware_request_complete_handler(const struct firmware *fw, 1534 void *context) 1535{ 1536 struct usbduxfastsub_s *usbduxfastsub_tmp = context; 1537 struct usb_device *usbdev = usbduxfastsub_tmp->usbdev; 1538 int ret; 1539 1540 if (fw == NULL) 1541 return; 1542 1543 /* 1544 * we need to upload the firmware here because fw will be 1545 * freed once we've left this function 1546 */ 1547 ret = read_firmware(usbduxfastsub_tmp, fw->data, fw->size); 1548 1549 if (ret) { 1550 dev_err(&usbdev->dev, 1551 "Could not upload firmware (err=%d)\n", 1552 ret); 1553 return; 1554 } 1555 1556 comedi_usb_auto_config(usbdev, BOARDNAME); 1557} 1558 1559/* 1560 * allocate memory for the urbs and initialise them 1561 */ 1562static int usbduxfastsub_probe(struct usb_interface *uinterf, 1563 const struct usb_device_id *id) 1564{ 1565 struct usb_device *udev = interface_to_usbdev(uinterf); 1566 int i; 1567 int index; 1568 int ret; 1569 1570 if (udev->speed != USB_SPEED_HIGH) { 1571 printk(KERN_ERR "comedi_: usbduxfast_: This driver needs" 1572 "USB 2.0 to operate. Aborting...\n"); 1573 return -ENODEV; 1574 } 1575#ifdef CONFIG_COMEDI_DEBUG 1576 printk(KERN_DEBUG "comedi_: usbduxfast_: finding a free structure for " 1577 "the usb-device\n"); 1578#endif 1579 down(&start_stop_sem); 1580 /* look for a free place in the usbduxfast array */ 1581 index = -1; 1582 for (i = 0; i < NUMUSBDUXFAST; i++) { 1583 if (!usbduxfastsub[i].probed) { 1584 index = i; 1585 break; 1586 } 1587 } 1588 1589 /* no more space */ 1590 if (index == -1) { 1591 printk(KERN_ERR "Too many usbduxfast-devices connected.\n"); 1592 up(&start_stop_sem); 1593 return -EMFILE; 1594 } 1595#ifdef CONFIG_COMEDI_DEBUG 1596 printk(KERN_DEBUG "comedi_: usbduxfast: usbduxfastsub[%d] is ready to " 1597 "connect to comedi.\n", index); 1598#endif 1599 1600 init_MUTEX(&(usbduxfastsub[index].sem)); 1601 /* save a pointer to the usb device */ 1602 usbduxfastsub[index].usbdev = udev; 1603 1604 /* save the interface itself */ 1605 usbduxfastsub[index].interface = uinterf; 1606 /* get the interface number from the interface */ 1607 usbduxfastsub[index].ifnum = uinterf->altsetting->desc.bInterfaceNumber; 1608 /* 1609 * hand the private data over to the usb subsystem 1610 * will be needed for disconnect 1611 */ 1612 usb_set_intfdata(uinterf, &(usbduxfastsub[index])); 1613 1614#ifdef CONFIG_COMEDI_DEBUG 1615 printk(KERN_DEBUG "comedi_: usbduxfast: ifnum=%d\n", 1616 usbduxfastsub[index].ifnum); 1617#endif 1618 /* create space for the commands going to the usb device */ 1619 usbduxfastsub[index].dux_commands = kmalloc(SIZEOFDUXBUFFER, 1620 GFP_KERNEL); 1621 if (!usbduxfastsub[index].dux_commands) { 1622 printk(KERN_ERR "comedi_: usbduxfast: error alloc space for " 1623 "dac commands\n"); 1624 tidy_up(&(usbduxfastsub[index])); 1625 up(&start_stop_sem); 1626 return -ENOMEM; 1627 } 1628 /* create space of the instruction buffer */ 1629 usbduxfastsub[index].insnBuffer = kmalloc(SIZEINSNBUF, GFP_KERNEL); 1630 if (!usbduxfastsub[index].insnBuffer) { 1631 printk(KERN_ERR "comedi_: usbduxfast: could not alloc space " 1632 "for insnBuffer\n"); 1633 tidy_up(&(usbduxfastsub[index])); 1634 up(&start_stop_sem); 1635 return -ENOMEM; 1636 } 1637 /* setting to alternate setting 1: enabling bulk ep */ 1638 i = usb_set_interface(usbduxfastsub[index].usbdev, 1639 usbduxfastsub[index].ifnum, 1); 1640 if (i < 0) { 1641 printk(KERN_ERR "comedi_: usbduxfast%d: could not switch to " 1642 "alternate setting 1.\n", index); 1643 tidy_up(&(usbduxfastsub[index])); 1644 up(&start_stop_sem); 1645 return -ENODEV; 1646 } 1647 usbduxfastsub[index].urbIn = usb_alloc_urb(0, GFP_KERNEL); 1648 if (!usbduxfastsub[index].urbIn) { 1649 printk(KERN_ERR "comedi_: usbduxfast%d: Could not alloc." 1650 "urb\n", index); 1651 tidy_up(&(usbduxfastsub[index])); 1652 up(&start_stop_sem); 1653 return -ENOMEM; 1654 } 1655 usbduxfastsub[index].transfer_buffer = kmalloc(SIZEINBUF, GFP_KERNEL); 1656 if (!usbduxfastsub[index].transfer_buffer) { 1657 printk(KERN_ERR "comedi_: usbduxfast%d: could not alloc. " 1658 "transb.\n", index); 1659 tidy_up(&(usbduxfastsub[index])); 1660 up(&start_stop_sem); 1661 return -ENOMEM; 1662 } 1663 /* we've reached the bottom of the function */ 1664 usbduxfastsub[index].probed = 1; 1665 up(&start_stop_sem); 1666 1667 ret = request_firmware_nowait(THIS_MODULE, 1668 FW_ACTION_HOTPLUG, 1669 "usbduxfast_firmware.hex", 1670 &udev->dev, 1671 usbduxfastsub + index, 1672 usbduxfast_firmware_request_complete_handler); 1673 1674 if (ret) { 1675 dev_err(&udev->dev, "could not load firmware (err=%d)\n", 1676 ret); 1677 return ret; 1678 } 1679 1680 printk(KERN_INFO "comedi_: usbduxfast%d has been successfully " 1681 "initialized.\n", index); 1682 /* success */ 1683 return 0; 1684} 1685 1686static void usbduxfastsub_disconnect(struct usb_interface *intf) 1687{ 1688 struct usbduxfastsub_s *udfs = usb_get_intfdata(intf); 1689 struct usb_device *udev = interface_to_usbdev(intf); 1690 1691 if (!udfs) { 1692 printk(KERN_ERR "comedi_: usbduxfast: disconnect called with " 1693 "null pointer.\n"); 1694 return; 1695 } 1696 if (udfs->usbdev != udev) { 1697 printk(KERN_ERR "comedi_: usbduxfast: BUG! called with wrong " 1698 "ptr!!!\n"); 1699 return; 1700 } 1701 1702 comedi_usb_auto_unconfig(udev); 1703 1704 down(&start_stop_sem); 1705 down(&udfs->sem); 1706 tidy_up(udfs); 1707 up(&udfs->sem); 1708 up(&start_stop_sem); 1709 1710#ifdef CONFIG_COMEDI_DEBUG 1711 printk(KERN_DEBUG "comedi_: usbduxfast: disconnected from the usb\n"); 1712#endif 1713} 1714 1715/* 1716 * is called when comedi-config is called 1717 */ 1718static int usbduxfast_attach(comedi_device *dev, comedi_devconfig *it) 1719{ 1720 int ret; 1721 int index; 1722 int i; 1723 comedi_subdevice *s = NULL; 1724 dev->private = NULL; 1725 1726 down(&start_stop_sem); 1727 /* 1728 * find a valid device which has been detected by the 1729 * probe function of the usb 1730 */ 1731 index = -1; 1732 for (i = 0; i < NUMUSBDUXFAST; i++) { 1733 if (usbduxfastsub[i].probed && !usbduxfastsub[i].attached) { 1734 index = i; 1735 break; 1736 } 1737 } 1738 1739 if (index < 0) { 1740 printk(KERN_ERR "comedi%d: usbduxfast: error: attach failed, " 1741 "no usbduxfast devs connected to the usb bus.\n", 1742 dev->minor); 1743 up(&start_stop_sem); 1744 return -ENODEV; 1745 } 1746 1747 down(&(usbduxfastsub[index].sem)); 1748 /* pointer back to the corresponding comedi device */ 1749 usbduxfastsub[index].comedidev = dev; 1750 1751 /* trying to upload the firmware into the chip */ 1752 if (comedi_aux_data(it->options, 0) && 1753 it->options[COMEDI_DEVCONF_AUX_DATA_LENGTH]) { 1754 read_firmware(&usbduxfastsub[index], 1755 comedi_aux_data(it->options, 0), 1756 it->options[COMEDI_DEVCONF_AUX_DATA_LENGTH]); 1757 } 1758 1759 dev->board_name = BOARDNAME; 1760 1761 /* set number of subdevices */ 1762 dev->n_subdevices = N_SUBDEVICES; 1763 1764 /* allocate space for the subdevices */ 1765 ret = alloc_subdevices(dev, N_SUBDEVICES); 1766 if (ret < 0) { 1767 printk(KERN_ERR "comedi%d: usbduxfast: error alloc space for " 1768 "subdev\n", dev->minor); 1769 up(&(usbduxfastsub[index].sem)); 1770 up(&start_stop_sem); 1771 return ret; 1772 } 1773 1774 printk(KERN_INFO "comedi%d: usbduxfast: usb-device %d is attached to " 1775 "comedi.\n", dev->minor, index); 1776 /* private structure is also simply the usb-structure */ 1777 dev->private = usbduxfastsub + index; 1778 /* the first subdevice is the A/D converter */ 1779 s = dev->subdevices + SUBDEV_AD; 1780 /* 1781 * the URBs get the comedi subdevice which is responsible for reading 1782 * this is the subdevice which reads data 1783 */ 1784 dev->read_subdev = s; 1785 /* the subdevice receives as private structure the usb-structure */ 1786 s->private = NULL; 1787 /* analog input */ 1788 s->type = COMEDI_SUBD_AI; 1789 /* readable and ref is to ground */ 1790 s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_CMD_READ; 1791 /* 16 channels */ 1792 s->n_chan = 16; 1793 /* length of the channellist */ 1794 s->len_chanlist = 16; 1795 /* callback functions */ 1796 s->insn_read = usbduxfast_ai_insn_read; 1797 s->do_cmdtest = usbduxfast_ai_cmdtest; 1798 s->do_cmd = usbduxfast_ai_cmd; 1799 s->cancel = usbduxfast_ai_cancel; 1800 /* max value from the A/D converter (12bit+1 bit for overflow) */ 1801 s->maxdata = 0x1000; 1802 /* range table to convert to physical units */ 1803 s->range_table = &range_usbduxfast_ai_range; 1804 1805 /* finally decide that it's attached */ 1806 usbduxfastsub[index].attached = 1; 1807 1808 up(&(usbduxfastsub[index].sem)); 1809 up(&start_stop_sem); 1810 printk(KERN_INFO "comedi%d: successfully attached to usbduxfast.\n", 1811 dev->minor); 1812 1813 return 0; 1814} 1815 1816static int usbduxfast_detach(comedi_device *dev) 1817{ 1818 struct usbduxfastsub_s *udfs; 1819 1820 if (!dev) { 1821 printk(KERN_ERR "comedi?: usbduxfast: detach without dev " 1822 "variable...\n"); 1823 return -EFAULT; 1824 } 1825 1826#ifdef CONFIG_COMEDI_DEBUG 1827 printk(KERN_DEBUG "comedi%d: usbduxfast: detach usb device\n", 1828 dev->minor); 1829#endif 1830 1831 udfs = dev->private; 1832 if (!udfs) { 1833 printk(KERN_ERR "comedi?: usbduxfast: detach without ptr to " 1834 "usbduxfastsub[]\n"); 1835 return -EFAULT; 1836 } 1837 1838 down(&udfs->sem); 1839 down(&start_stop_sem); 1840 /* 1841 * Don't allow detach to free the private structure 1842 * It's one entry of of usbduxfastsub[] 1843 */ 1844 dev->private = NULL; 1845 udfs->attached = 0; 1846 udfs->comedidev = NULL; 1847#ifdef CONFIG_COMEDI_DEBUG 1848 printk(KERN_DEBUG "comedi%d: usbduxfast: detach: successfully " 1849 "removed\n", dev->minor); 1850#endif 1851 up(&start_stop_sem); 1852 up(&udfs->sem); 1853 return 0; 1854} 1855 1856/* 1857 * main driver struct 1858 */ 1859static comedi_driver driver_usbduxfast = { 1860 .driver_name = "usbduxfast", 1861 .module = THIS_MODULE, 1862 .attach = usbduxfast_attach, 1863 .detach = usbduxfast_detach 1864}; 1865 1866/* 1867 * Table with the USB-devices: just now only testing IDs 1868 */ 1869static struct usb_device_id usbduxfastsub_table[] = { 1870 /* { USB_DEVICE(0x4b4, 0x8613) }, testing */ 1871 { USB_DEVICE(0x13d8, 0x0010) }, /* real ID */ 1872 { USB_DEVICE(0x13d8, 0x0011) }, /* real ID */ 1873 { } /* Terminating entry */ 1874}; 1875 1876MODULE_DEVICE_TABLE(usb, usbduxfastsub_table); 1877 1878/* 1879 * The usbduxfastsub-driver 1880 */ 1881static struct usb_driver usbduxfastsub_driver = { 1882#ifdef COMEDI_HAVE_USB_DRIVER_OWNER 1883 .owner = THIS_MODULE, 1884#endif 1885 .name = BOARDNAME, 1886 .probe = usbduxfastsub_probe, 1887 .disconnect = usbduxfastsub_disconnect, 1888 .id_table = usbduxfastsub_table 1889}; 1890 1891/* 1892 * Can't use the nice macro as I have also to initialise the USB subsystem: 1893 * registering the usb-system _and_ the comedi-driver 1894 */ 1895static int __init init_usbduxfast(void) 1896{ 1897 printk(KERN_INFO 1898 KBUILD_MODNAME ": " DRIVER_VERSION ":" DRIVER_DESC "\n"); 1899 usb_register(&usbduxfastsub_driver); 1900 comedi_driver_register(&driver_usbduxfast); 1901 return 0; 1902} 1903 1904/* 1905 * deregistering the comedi driver and the usb-subsystem 1906 */ 1907static void __exit exit_usbduxfast(void) 1908{ 1909 comedi_driver_unregister(&driver_usbduxfast); 1910 usb_deregister(&usbduxfastsub_driver); 1911} 1912 1913module_init(init_usbduxfast); 1914module_exit(exit_usbduxfast); 1915 1916MODULE_AUTHOR(DRIVER_AUTHOR); 1917MODULE_DESCRIPTION(DRIVER_DESC); 1918MODULE_LICENSE("GPL"); 1919