usbduxfast.c revision 8867635903ea4c52776820954ae7aaaca1e438cb
1#define DRIVER_VERSION "v0.99a" 2#define DRIVER_AUTHOR "Bernd Porr, BerndPorr@f2s.com" 3#define DRIVER_DESC "USB-DUXfast, BerndPorr@f2s.com" 4/* 5 comedi/drivers/usbduxfast.c 6 Copyright (C) 2004 Bernd Porr, Bernd.Porr@f2s.com 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 2 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program; if not, write to the Free Software 20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21*/ 22 23/* 24Driver: usbduxfast 25Description: ITL USB-DUXfast 26Devices: [ITL] USB-DUX (usbduxfast.o) 27Author: Bernd Porr <BerndPorr@f2s.com> 28Updated: 04 Dec 2006 29Status: testing 30*/ 31 32/* 33 * I must give credit here to Chris Baugher who 34 * wrote the driver for AT-MIO-16d. I used some parts of this 35 * driver. I also must give credits to David Brownell 36 * who supported me with the USB development. 37 * 38 * Bernd Porr 39 * 40 * 41 * Revision history: 42 * 0.9: Dropping the first data packet which seems to be from the last transfer. 43 * Buffer overflows in the FX2 are handed over to comedi. 44 * 0.92: Dropping now 4 packets. The quad buffer has to be emptied. 45 * Added insn command basically for testing. Sample rate is 1MHz/16ch=62.5kHz 46 * 0.99: Ian Abbott pointed out a bug which has been corrected. Thanks! 47 * 0.99a: added external trigger. 48 */ 49 50#include <linux/kernel.h> 51#include <linux/module.h> 52#include <linux/init.h> 53#include <linux/slab.h> 54#include <linux/input.h> 55#include <linux/usb.h> 56#include <linux/smp_lock.h> 57#include <linux/fcntl.h> 58#include <linux/compiler.h> 59#include "comedi_fc.h" 60#include "../comedidev.h" 61 62// (un)comment this if you want to have debug info. 63//#define CONFIG_COMEDI_DEBUG 64#undef CONFIG_COMEDI_DEBUG 65 66#define BOARDNAME "usbduxfast" 67 68// timeout for the USB-transfer 69#define EZTIMEOUT 30 70 71// constants for "firmware" upload and download 72#define USBDUXFASTSUB_FIRMWARE 0xA0 73#define VENDOR_DIR_IN 0xC0 74#define VENDOR_DIR_OUT 0x40 75 76// internal adresses of the 8051 processor 77#define USBDUXFASTSUB_CPUCS 0xE600 78 79// max lenghth of the transfer-buffer for software upload 80#define TB_LEN 0x2000 81 82// Input endpoint number 83#define BULKINEP 6 84 85// Endpoint for the A/D channellist: bulk OUT 86#define CHANNELLISTEP 4 87 88// Number of channels 89#define NUMCHANNELS 32 90 91// size of the waveform descriptor 92#define WAVESIZE 0x20 93 94// Size of one A/D value 95#define SIZEADIN ((sizeof(int16_t))) 96 97// Size of the input-buffer IN BYTES 98#define SIZEINBUF 512 99 100// 16 bytes. 101#define SIZEINSNBUF 512 102 103// Size of the buffer for the dux commands 104#define SIZEOFDUXBUFFER 256 // bytes 105 106// Number of in-URBs which receive the data: min=5 107#define NUMOFINBUFFERSHIGH 10 108 109// Total number of usbduxfast devices 110#define NUMUSBDUXFAST 16 111 112// Number of subdevices 113#define N_SUBDEVICES 1 114 115// Analogue in subdevice 116#define SUBDEV_AD 0 117 118// min delay steps for more than one channel 119// basically when the mux gives up. ;-) 120#define MIN_SAMPLING_PERIOD 9 // steps at 30MHz in the FX2 121 122// Max number of 1/30MHz delay steps: 123#define MAX_SAMPLING_PERIOD 500 124 125// Number of received packets to ignore before we start handing data over to comedi. 126// It's quad buffering and we have to ignore 4 packets. 127#define PACKETS_TO_IGNORE 4 128 129///////////////////////////////////////////// 130// comedi constants 131static const comedi_lrange range_usbduxfast_ai_range = { 2, { 132 BIP_RANGE(0.75), 133 BIP_RANGE(0.5), 134 } 135}; 136 137/* 138 * private structure of one subdevice 139 */ 140 141// This is the structure which holds all the data of this driver 142// one sub device just now: A/D 143typedef struct { 144 // attached? 145 int attached; 146 // is it associated with a subdevice? 147 int probed; 148 // pointer to the usb-device 149 struct usb_device *usbdev; 150 // BULK-transfer handling: urb 151 struct urb *urbIn; 152 int8_t *transfer_buffer; 153 // input buffer for single insn 154 int16_t *insnBuffer; 155 // interface number 156 int ifnum; 157#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0) 158 // interface structure in 2.6 159 struct usb_interface *interface; 160#endif 161 // comedi device for the interrupt context 162 comedi_device *comedidev; 163 // asynchronous command is running 164 short int ai_cmd_running; 165 // continous aquisition 166 short int ai_continous; 167 // number of samples to aquire 168 long int ai_sample_count; 169 // commands 170 uint8_t *dux_commands; 171 // counter which ignores the first buffers 172 int ignore; 173 struct semaphore sem; 174} usbduxfastsub_t; 175 176// The pointer to the private usb-data of the driver 177// is also the private data for the comedi-device. 178// This has to be global as the usb subsystem needs 179// global variables. The other reason is that this 180// structure must be there _before_ any comedi 181// command is issued. The usb subsystem must be 182// initialised before comedi can access it. 183static usbduxfastsub_t usbduxfastsub[NUMUSBDUXFAST]; 184 185static DECLARE_MUTEX(start_stop_sem); 186 187// bulk transfers to usbduxfast 188 189#define SENDADCOMMANDS 0 190#define SENDINITEP6 1 191 192static int send_dux_commands(usbduxfastsub_t * this_usbduxfastsub, int cmd_type) 193{ 194 int result, nsent; 195 this_usbduxfastsub->dux_commands[0] = cmd_type; 196#ifdef CONFIG_COMEDI_DEBUG 197 int i; 198 printk("comedi%d: usbduxfast: dux_commands: ", 199 this_usbduxfastsub->comedidev->minor); 200 for (i = 0; i < SIZEOFDUXBUFFER; i++) { 201 printk(" %02x", this_usbduxfastsub->dux_commands[i]); 202 } 203 printk("\n"); 204#endif 205 result = usb_bulk_msg(this_usbduxfastsub->usbdev, 206 usb_sndbulkpipe(this_usbduxfastsub->usbdev, 207 CHANNELLISTEP), 208 this_usbduxfastsub->dux_commands, SIZEOFDUXBUFFER, 209 &nsent, 10000); 210 if (result < 0) { 211 printk("comedi%d: could not transmit dux_commands to the usb-device, err=%d\n", this_usbduxfastsub->comedidev->minor, result); 212 } 213 return result; 214} 215 216// Stops the data acquision 217// It should be safe to call this function from any context 218static int usbduxfastsub_unlink_InURBs(usbduxfastsub_t * usbduxfastsub_tmp) 219{ 220 int j = 0; 221 int err = 0; 222 223 if (usbduxfastsub_tmp && usbduxfastsub_tmp->urbIn) { 224 usbduxfastsub_tmp->ai_cmd_running = 0; 225#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,8) 226 j = usb_unlink_urb(usbduxfastsub_tmp->urbIn); 227 if (j < 0) { 228 err = j; 229 } 230#else 231 // waits until a running transfer is over 232 usb_kill_urb(usbduxfastsub_tmp->urbIn); 233 j = 0; 234#endif 235 } 236#ifdef CONFIG_COMEDI_DEBUG 237 printk("comedi: usbduxfast: unlinked InURB: res=%d\n", j); 238#endif 239 return err; 240} 241 242/* This will stop a running acquisition operation */ 243// Is called from within this driver from both the 244// interrupt context and from comedi 245static int usbduxfast_ai_stop(usbduxfastsub_t * this_usbduxfastsub, 246 int do_unlink) 247{ 248 int ret = 0; 249 250 if (!this_usbduxfastsub) { 251 printk("comedi?: usbduxfast_ai_stop: this_usbduxfastsub=NULL!\n"); 252 return -EFAULT; 253 } 254#ifdef CONFIG_COMEDI_DEBUG 255 printk("comedi: usbduxfast_ai_stop\n"); 256#endif 257 258 this_usbduxfastsub->ai_cmd_running = 0; 259 260 if (do_unlink) { 261 // stop aquistion 262 ret = usbduxfastsub_unlink_InURBs(this_usbduxfastsub); 263 } 264 265 return ret; 266} 267 268// This will cancel a running acquisition operation. 269// This is called by comedi but never from inside the 270// driver. 271static int usbduxfast_ai_cancel(comedi_device * dev, comedi_subdevice * s) 272{ 273 usbduxfastsub_t *this_usbduxfastsub; 274 int res = 0; 275 276 // force unlink of all urbs 277#ifdef CONFIG_COMEDI_DEBUG 278 printk("comedi: usbduxfast_ai_cancel\n"); 279#endif 280 this_usbduxfastsub = dev->private; 281 if (!this_usbduxfastsub) { 282 printk("comedi: usbduxfast_ai_cancel: this_usbduxfastsub=NULL\n"); 283 return -EFAULT; 284 } 285 down(&this_usbduxfastsub->sem); 286 if (!(this_usbduxfastsub->probed)) { 287 up(&this_usbduxfastsub->sem); 288 return -ENODEV; 289 } 290 // unlink 291 res = usbduxfast_ai_stop(this_usbduxfastsub, 1); 292 up(&this_usbduxfastsub->sem); 293 294 return res; 295} 296 297// analogue IN 298// interrupt service routine 299#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0) 300static void usbduxfastsub_ai_Irq(struct urb *urb) 301#else 302static void usbduxfastsub_ai_Irq(struct urb *urb PT_REGS_ARG) 303#endif 304{ 305 int n, err; 306 usbduxfastsub_t *this_usbduxfastsub; 307 comedi_device *this_comedidev; 308 comedi_subdevice *s; 309 uint16_t *p; 310 311 // sanity checks 312 // is the urb there? 313 if (!urb) { 314 printk("comedi_: usbduxfast_: ao int-handler called with urb=NULL!\n"); 315 return; 316 } 317 // the context variable points to the subdevice 318 this_comedidev = urb->context; 319 if (!this_comedidev) { 320 printk("comedi_: usbduxfast_: urb context is a NULL pointer!\n"); 321 return; 322 } 323 // the private structure of the subdevice is usbduxfastsub_t 324 this_usbduxfastsub = this_comedidev->private; 325 if (!this_usbduxfastsub) { 326 printk("comedi_: usbduxfast_: private of comedi subdev is a NULL pointer!\n"); 327 return; 328 } 329 // are we running a command? 330 if (unlikely(!(this_usbduxfastsub->ai_cmd_running))) { 331 // not running a command 332 // do not continue execution if no asynchronous command is running 333 // in particular not resubmit 334 return; 335 } 336 337 if (unlikely(!(this_usbduxfastsub->attached))) { 338 // no comedi device there 339 return; 340 } 341 // subdevice which is the AD converter 342 s = this_comedidev->subdevices + SUBDEV_AD; 343 344 // first we test if something unusual has just happened 345 switch (urb->status) { 346 case 0: 347 break; 348 349 // happens after an unlink command or when the device is plugged out 350 case -ECONNRESET: 351 case -ENOENT: 352 case -ESHUTDOWN: 353 case -ECONNABORTED: 354 // tell this comedi 355 s->async->events |= COMEDI_CB_EOA; 356 s->async->events |= COMEDI_CB_ERROR; 357 comedi_event(this_usbduxfastsub->comedidev, s); 358 // stop the transfer w/o unlink 359 usbduxfast_ai_stop(this_usbduxfastsub, 0); 360 return; 361 362 default: 363 printk("comedi%d: usbduxfast: non-zero urb status received in ai intr context: %d\n", this_usbduxfastsub->comedidev->minor, urb->status); 364 s->async->events |= COMEDI_CB_EOA; 365 s->async->events |= COMEDI_CB_ERROR; 366 comedi_event(this_usbduxfastsub->comedidev, s); 367 usbduxfast_ai_stop(this_usbduxfastsub, 0); 368 return; 369 } 370 371 p = urb->transfer_buffer; 372 if (!this_usbduxfastsub->ignore) { 373 if (!(this_usbduxfastsub->ai_continous)) { 374 // not continous, fixed number of samples 375 n = urb->actual_length / sizeof(uint16_t); 376 if (unlikely(this_usbduxfastsub->ai_sample_count < n)) { 377 // we have send only a fraction of the bytes received 378 cfc_write_array_to_buffer(s, 379 urb->transfer_buffer, 380 this_usbduxfastsub->ai_sample_count * 381 sizeof(uint16_t)); 382 usbduxfast_ai_stop(this_usbduxfastsub, 0); 383 // say comedi that the acquistion is over 384 s->async->events |= COMEDI_CB_EOA; 385 comedi_event(this_usbduxfastsub->comedidev, s); 386 return; 387 } 388 this_usbduxfastsub->ai_sample_count -= n; 389 } 390 // write the full buffer to comedi 391 cfc_write_array_to_buffer(s, 392 urb->transfer_buffer, urb->actual_length); 393 394 // tell comedi that data is there 395 comedi_event(this_usbduxfastsub->comedidev, s); 396 397 } else { 398 // ignore this packet 399 this_usbduxfastsub->ignore--; 400 } 401 402 // command is still running 403 // resubmit urb for BULK transfer 404 urb->dev = this_usbduxfastsub->usbdev; 405 urb->status = 0; 406 err = usb_submit_urb(urb, GFP_ATOMIC); 407 if (err < 0) { 408 printk("comedi%d: usbduxfast: urb resubm failed: %d", 409 this_usbduxfastsub->comedidev->minor, err); 410 s->async->events |= COMEDI_CB_EOA; 411 s->async->events |= COMEDI_CB_ERROR; 412 comedi_event(this_usbduxfastsub->comedidev, s); 413 usbduxfast_ai_stop(this_usbduxfastsub, 0); 414 } 415} 416 417static int usbduxfastsub_start(usbduxfastsub_t * usbduxfastsub) 418{ 419 int errcode = 0; 420 unsigned char local_transfer_buffer[16]; 421 422 if (usbduxfastsub->probed) { 423 // 7f92 to zero 424 local_transfer_buffer[0] = 0; 425 errcode = usb_control_msg(usbduxfastsub->usbdev, 426 // create a pipe for a control transfer 427 usb_sndctrlpipe(usbduxfastsub->usbdev, 0), 428 // bRequest, "Firmware" 429 USBDUXFASTSUB_FIRMWARE, 430 // bmRequestType 431 VENDOR_DIR_OUT, 432 // Value 433 USBDUXFASTSUB_CPUCS, 434 // Index 435 0x0000, 436 // address of the transfer buffer 437 local_transfer_buffer, 438 // Length 439 1, 440 // Timeout 441 EZTIMEOUT); 442 if (errcode < 0) { 443 printk("comedi_: usbduxfast_: control msg failed (start)\n"); 444 return errcode; 445 } 446 } 447 return 0; 448} 449 450static int usbduxfastsub_stop(usbduxfastsub_t * usbduxfastsub) 451{ 452 int errcode = 0; 453 454 unsigned char local_transfer_buffer[16]; 455 if (usbduxfastsub->probed) { 456 // 7f92 to one 457 local_transfer_buffer[0] = 1; 458 errcode = usb_control_msg(usbduxfastsub->usbdev, 459 usb_sndctrlpipe(usbduxfastsub->usbdev, 0), 460 // bRequest, "Firmware" 461 USBDUXFASTSUB_FIRMWARE, 462 // bmRequestType 463 VENDOR_DIR_OUT, 464 // Value 465 USBDUXFASTSUB_CPUCS, 466 // Index 467 0x0000, local_transfer_buffer, 468 // Length 469 1, 470 // Timeout 471 EZTIMEOUT); 472 if (errcode < 0) { 473 printk("comedi_: usbduxfast: control msg failed (stop)\n"); 474 return errcode; 475 } 476 } 477 return 0; 478} 479 480static int usbduxfastsub_upload(usbduxfastsub_t * usbduxfastsub, 481 unsigned char *local_transfer_buffer, 482 unsigned int startAddr, unsigned int len) 483{ 484 int errcode; 485 486 if (usbduxfastsub->probed) { 487#ifdef CONFIG_COMEDI_DEBUG 488 printk("comedi%d: usbduxfast: uploading %d bytes", 489 usbduxfastsub->comedidev->minor, len); 490 printk(" to addr %d, first byte=%d.\n", 491 startAddr, local_transfer_buffer[0]); 492#endif 493 errcode = usb_control_msg(usbduxfastsub->usbdev, 494 usb_sndctrlpipe(usbduxfastsub->usbdev, 0), 495 // brequest, firmware 496 USBDUXFASTSUB_FIRMWARE, 497 // bmRequestType 498 VENDOR_DIR_OUT, 499 // value 500 startAddr, 501 // index 502 0x0000, 503 // our local safe buffer 504 local_transfer_buffer, 505 // length 506 len, 507 // timeout 508 EZTIMEOUT); 509#ifdef CONFIG_COMEDI_DEBUG 510 printk("comedi_: usbduxfast: result=%d\n", errcode); 511#endif 512 if (errcode < 0) { 513 printk("comedi_: usbduxfast: uppload failed\n"); 514 return errcode; 515 } 516 } else { 517 // no device on the bus for this index 518 return -EFAULT; 519 } 520 return 0; 521} 522 523int firmwareUpload(usbduxfastsub_t * usbduxfastsub, 524 unsigned char *firmwareBinary, int sizeFirmware) 525{ 526 int ret; 527 528 if (!firmwareBinary) { 529 return 0; 530 } 531 ret = usbduxfastsub_stop(usbduxfastsub); 532 if (ret < 0) { 533 printk("comedi_: usbduxfast: can not stop firmware\n"); 534 return ret; 535 } 536 ret = usbduxfastsub_upload(usbduxfastsub, 537 firmwareBinary, 0, sizeFirmware); 538 if (ret < 0) { 539 printk("comedi_: usbduxfast: firmware upload failed\n"); 540 return ret; 541 } 542 ret = usbduxfastsub_start(usbduxfastsub); 543 if (ret < 0) { 544 printk("comedi_: usbduxfast: can not start firmware\n"); 545 return ret; 546 } 547 return 0; 548} 549 550int usbduxfastsub_submit_InURBs(usbduxfastsub_t * usbduxfastsub) 551{ 552 int errFlag; 553 554 if (!usbduxfastsub) { 555 return -EFAULT; 556 } 557 usb_fill_bulk_urb(usbduxfastsub->urbIn, 558 usbduxfastsub->usbdev, 559 usb_rcvbulkpipe(usbduxfastsub->usbdev, BULKINEP), 560 usbduxfastsub->transfer_buffer, 561 SIZEINBUF, usbduxfastsub_ai_Irq, usbduxfastsub->comedidev); 562 563#ifdef CONFIG_COMEDI_DEBUG 564 printk("comedi%d: usbduxfast: submitting in-urb: %x,%x\n", 565 usbduxfastsub->comedidev->minor, 566 (int)(usbduxfastsub->urbIn->context), 567 (int)(usbduxfastsub->urbIn->dev)); 568#endif 569 errFlag = usb_submit_urb(usbduxfastsub->urbIn, GFP_ATOMIC); 570 if (errFlag) { 571 printk("comedi_: usbduxfast: ai: usb_submit_urb error %d\n", 572 errFlag); 573 return errFlag; 574 } 575 return 0; 576} 577 578static int usbduxfast_ai_cmdtest(comedi_device * dev, 579 comedi_subdevice * s, comedi_cmd * cmd) 580{ 581 int err = 0, stop_mask = 0; 582 long int steps, tmp = 0; 583 int minSamplPer; 584 usbduxfastsub_t *this_usbduxfastsub = dev->private; 585 if (!(this_usbduxfastsub->probed)) { 586 return -ENODEV; 587 } 588#ifdef CONFIG_COMEDI_DEBUG 589 printk("comedi%d: usbduxfast_ai_cmdtest\n", dev->minor); 590 printk("comedi%d: usbduxfast: convert_arg=%u scan_begin_arg=%u\n", 591 dev->minor, cmd->convert_arg, cmd->scan_begin_arg); 592#endif 593 /* step 1: make sure trigger sources are trivially valid */ 594 595 tmp = cmd->start_src; 596 cmd->start_src &= TRIG_NOW | TRIG_EXT | TRIG_INT; 597 if (!cmd->start_src || tmp != cmd->start_src) 598 err++; 599 600 tmp = cmd->scan_begin_src; 601 cmd->scan_begin_src &= TRIG_TIMER | TRIG_FOLLOW | TRIG_EXT; 602 if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src) 603 err++; 604 605 tmp = cmd->convert_src; 606 cmd->convert_src &= TRIG_TIMER | TRIG_EXT; 607 if (!cmd->convert_src || tmp != cmd->convert_src) 608 err++; 609 610 tmp = cmd->scan_end_src; 611 cmd->scan_end_src &= TRIG_COUNT; 612 if (!cmd->scan_end_src || tmp != cmd->scan_end_src) 613 err++; 614 615 tmp = cmd->stop_src; 616 stop_mask = TRIG_COUNT | TRIG_NONE; 617 cmd->stop_src &= stop_mask; 618 if (!cmd->stop_src || tmp != cmd->stop_src) 619 err++; 620 621 if (err) 622 return 1; 623 624 /* step 2: make sure trigger sources are unique and mutually compatible */ 625 626 if (cmd->start_src != TRIG_NOW && 627 cmd->start_src != TRIG_EXT && cmd->start_src != TRIG_INT) 628 err++; 629 if (cmd->scan_begin_src != TRIG_TIMER && 630 cmd->scan_begin_src != TRIG_FOLLOW && 631 cmd->scan_begin_src != TRIG_EXT) 632 err++; 633 if (cmd->convert_src != TRIG_TIMER && cmd->convert_src != TRIG_EXT) 634 err++; 635 if (cmd->stop_src != TRIG_COUNT && 636 cmd->stop_src != TRIG_EXT && cmd->stop_src != TRIG_NONE) 637 err++; 638 639 // can't have external stop and start triggers at once 640 if (cmd->start_src == TRIG_EXT && cmd->stop_src == TRIG_EXT) 641 err++; 642 643 if (err) 644 return 2; 645 646 /* step 3: make sure arguments are trivially compatible */ 647 648 if (cmd->start_src == TRIG_NOW && cmd->start_arg != 0) { 649 cmd->start_arg = 0; 650 err++; 651 } 652 653 if (!cmd->chanlist_len) { 654 err++; 655 } 656 if (cmd->scan_end_arg != cmd->chanlist_len) { 657 cmd->scan_end_arg = cmd->chanlist_len; 658 err++; 659 } 660 661 if (cmd->chanlist_len == 1) { 662 minSamplPer = 1; 663 } else { 664 minSamplPer = MIN_SAMPLING_PERIOD; 665 } 666 667 if (cmd->convert_src == TRIG_TIMER) { 668 steps = cmd->convert_arg * 30; 669 if (steps < (minSamplPer * 1000)) { 670 steps = minSamplPer * 1000; 671 } 672 if (steps > (MAX_SAMPLING_PERIOD * 1000)) { 673 steps = MAX_SAMPLING_PERIOD * 1000; 674 } 675 // calc arg again 676 tmp = steps / 30; 677 if (cmd->convert_arg != tmp) { 678 cmd->convert_arg = tmp; 679 err++; 680 } 681 } 682 683 if (cmd->scan_begin_src == TRIG_TIMER) { 684 err++; 685 } 686 // stop source 687 switch (cmd->stop_src) { 688 case TRIG_COUNT: 689 if (!cmd->stop_arg) { 690 cmd->stop_arg = 1; 691 err++; 692 } 693 break; 694 case TRIG_NONE: 695 if (cmd->stop_arg != 0) { 696 cmd->stop_arg = 0; 697 err++; 698 } 699 break; 700 // TRIG_EXT doesn't care since it doesn't trigger off a numbered channel 701 default: 702 break; 703 } 704 705 if (err) 706 return 3; 707 708 /* step 4: fix up any arguments */ 709 710 return 0; 711 712} 713 714static int usbduxfast_ai_inttrig(comedi_device * dev, 715 comedi_subdevice * s, unsigned int trignum) 716{ 717 int ret; 718 usbduxfastsub_t *this_usbduxfastsub = dev->private; 719 if (!this_usbduxfastsub) { 720 return -EFAULT; 721 } 722 down(&this_usbduxfastsub->sem); 723 if (!(this_usbduxfastsub->probed)) { 724 up(&this_usbduxfastsub->sem); 725 return -ENODEV; 726 } 727#ifdef CONFIG_COMEDI_DEBUG 728 printk("comedi%d: usbduxfast_ai_inttrig\n", dev->minor); 729#endif 730 731 if (trignum != 0) { 732 printk("comedi%d: usbduxfast_ai_inttrig: invalid trignum\n", 733 dev->minor); 734 up(&this_usbduxfastsub->sem); 735 return -EINVAL; 736 } 737 if (!(this_usbduxfastsub->ai_cmd_running)) { 738 this_usbduxfastsub->ai_cmd_running = 1; 739 ret = usbduxfastsub_submit_InURBs(this_usbduxfastsub); 740 if (ret < 0) { 741 printk("comedi%d: usbduxfast_ai_inttrig: urbSubmit: err=%d\n", dev->minor, ret); 742 this_usbduxfastsub->ai_cmd_running = 0; 743 up(&this_usbduxfastsub->sem); 744 return ret; 745 } 746 s->async->inttrig = NULL; 747 } else { 748 printk("comedi%d: ai_inttrig but acqu is already running\n", 749 dev->minor); 750 } 751 up(&this_usbduxfastsub->sem); 752 return 1; 753} 754 755// offsets for the GPIF bytes 756// the first byte is the command byte 757#define LENBASE 1+0x00 758#define OPBASE 1+0x08 759#define OUTBASE 1+0x10 760#define LOGBASE 1+0x18 761 762static int usbduxfast_ai_cmd(comedi_device * dev, comedi_subdevice * s) 763{ 764 comedi_cmd *cmd = &s->async->cmd; 765 unsigned int chan, gain, rngmask = 0xff; 766 int i, j, ret; 767 usbduxfastsub_t *this_usbduxfastsub = dev->private; 768 int result; 769 long steps, steps_tmp; 770 771#ifdef CONFIG_COMEDI_DEBUG 772 printk("comedi%d: usbduxfast_ai_cmd\n", dev->minor); 773#endif 774 if (!this_usbduxfastsub) { 775 return -EFAULT; 776 } 777 down(&this_usbduxfastsub->sem); 778 if (!(this_usbduxfastsub->probed)) { 779 up(&this_usbduxfastsub->sem); 780 return -ENODEV; 781 } 782 if (this_usbduxfastsub->ai_cmd_running) { 783 printk("comedi%d: ai_cmd not possible. Another ai_cmd is running.\n", dev->minor); 784 up(&this_usbduxfastsub->sem); 785 return -EBUSY; 786 } 787 // set current channel of the running aquisition to zero 788 s->async->cur_chan = 0; 789 790 // ignore the first buffers from the device if there is an error condition 791 this_usbduxfastsub->ignore = PACKETS_TO_IGNORE; 792 793 if (cmd->chanlist_len > 0) { 794 gain = CR_RANGE(cmd->chanlist[0]); 795 for (i = 0; i < cmd->chanlist_len; ++i) { 796 chan = CR_CHAN(cmd->chanlist[i]); 797 if (chan != i) { 798 printk("comedi%d: cmd is accepting only consecutive channels.\n", dev->minor); 799 up(&this_usbduxfastsub->sem); 800 return -EINVAL; 801 } 802 if ((gain != CR_RANGE(cmd->chanlist[i])) 803 && (cmd->chanlist_len > 3)) { 804 printk("comedi%d: the gain must be the same for all channels.\n", dev->minor); 805 up(&this_usbduxfastsub->sem); 806 return -EINVAL; 807 } 808 if (i >= NUMCHANNELS) { 809 printk("comedi%d: channel list too long\n", 810 dev->minor); 811 break; 812 } 813 } 814 } 815 steps = 0; 816 if (cmd->scan_begin_src == TRIG_TIMER) { 817 printk("comedi%d: usbduxfast: scan_begin_src==TRIG_TIMER not valid.\n", dev->minor); 818 up(&this_usbduxfastsub->sem); 819 return -EINVAL; 820 } 821 if (cmd->convert_src == TRIG_TIMER) { 822 steps = (cmd->convert_arg * 30) / 1000; 823 } 824 if ((steps < MIN_SAMPLING_PERIOD) && (cmd->chanlist_len != 1)) { 825 printk("comedi%d: usbduxfast: ai_cmd: steps=%ld, scan_begin_arg=%d. Not properly tested by cmdtest?\n", dev->minor, steps, cmd->scan_begin_arg); 826 up(&this_usbduxfastsub->sem); 827 return -EINVAL; 828 } 829 if (steps > MAX_SAMPLING_PERIOD) { 830 printk("comedi%d: usbduxfast: ai_cmd: sampling rate too low.\n", 831 dev->minor); 832 up(&this_usbduxfastsub->sem); 833 return -EINVAL; 834 } 835 if ((cmd->start_src == TRIG_EXT) && (cmd->chanlist_len != 1) 836 && (cmd->chanlist_len != 16)) { 837 printk("comedi%d: usbduxfast: ai_cmd: TRIG_EXT only with 1 or 16 channels possible.\n", dev->minor); 838 up(&this_usbduxfastsub->sem); 839 return -EINVAL; 840 } 841#ifdef CONFIG_COMEDI_DEBUG 842 printk("comedi%d: usbduxfast: steps=%ld, convert_arg=%u, ai_timer=%u\n", 843 dev->minor, 844 steps, cmd->convert_arg, this_usbduxfastsub->ai_timer); 845#endif 846 847 switch (cmd->chanlist_len) { 848 // one channel 849 case 1: 850 if (CR_RANGE(cmd->chanlist[0]) > 0) 851 rngmask = 0xff - 0x04; 852 else 853 rngmask = 0xff; 854 855 // for external trigger: looping in this state until the RDY0 pin 856 // becomes zero 857 if (cmd->start_src == TRIG_EXT) { // we loop here until ready has been set 858 this_usbduxfastsub->dux_commands[LENBASE + 0] = 0x01; // branch back to state 0 859 this_usbduxfastsub->dux_commands[OPBASE + 0] = 0x01; // deceision state w/o data 860 this_usbduxfastsub->dux_commands[OUTBASE + 0] = 861 0xFF & rngmask; 862 this_usbduxfastsub->dux_commands[LOGBASE + 0] = 0x00; // RDY0 = 0 863 } else { // we just proceed to state 1 864 this_usbduxfastsub->dux_commands[LENBASE + 0] = 1; 865 this_usbduxfastsub->dux_commands[OPBASE + 0] = 0; 866 this_usbduxfastsub->dux_commands[OUTBASE + 0] = 867 0xFF & rngmask; 868 this_usbduxfastsub->dux_commands[LOGBASE + 0] = 0; 869 } 870 871 if (steps < MIN_SAMPLING_PERIOD) { 872 // for fast single channel aqu without mux 873 if (steps <= 1) { 874 // we just stay here at state 1 and rexecute the same state 875 // this gives us 30MHz sampling rate 876 this_usbduxfastsub->dux_commands[LENBASE + 1] = 0x89; // branch back to state 1 877 this_usbduxfastsub->dux_commands[OPBASE + 1] = 0x03; // deceision state with data 878 this_usbduxfastsub->dux_commands[OUTBASE + 1] = 879 0xFF & rngmask; 880 this_usbduxfastsub->dux_commands[LOGBASE + 1] = 0xFF; // doesn't matter 881 } else { 882 // we loop through two states: data and delay: max rate is 15Mhz 883 this_usbduxfastsub->dux_commands[LENBASE + 1] = 884 steps - 1; 885 this_usbduxfastsub->dux_commands[OPBASE + 1] = 0x02; // data 886 this_usbduxfastsub->dux_commands[OUTBASE + 1] = 887 0xFF & rngmask; 888 this_usbduxfastsub->dux_commands[LOGBASE + 1] = 0; // doesn't matter 889 890 this_usbduxfastsub->dux_commands[LENBASE + 2] = 0x09; // branch back to state 1 891 this_usbduxfastsub->dux_commands[OPBASE + 2] = 0x01; // deceision state w/o data 892 this_usbduxfastsub->dux_commands[OUTBASE + 2] = 893 0xFF & rngmask; 894 this_usbduxfastsub->dux_commands[LOGBASE + 2] = 0xFF; // doesn't matter 895 } 896 } else { 897 // we loop through 3 states: 2x delay and 1x data. This gives a min 898 // sampling rate of 60kHz. 899 900 // we have 1 state with duration 1 901 steps = steps - 1; 902 903 // do the first part of the delay 904 this_usbduxfastsub->dux_commands[LENBASE + 1] = 905 steps / 2; 906 this_usbduxfastsub->dux_commands[OPBASE + 1] = 0; 907 this_usbduxfastsub->dux_commands[OUTBASE + 1] = 908 0xFF & rngmask; 909 this_usbduxfastsub->dux_commands[LOGBASE + 1] = 0; 910 911 // and the second part 912 this_usbduxfastsub->dux_commands[LENBASE + 2] = 913 steps - steps / 2; 914 this_usbduxfastsub->dux_commands[OPBASE + 2] = 0; 915 this_usbduxfastsub->dux_commands[OUTBASE + 2] = 916 0xFF & rngmask; 917 this_usbduxfastsub->dux_commands[LOGBASE + 2] = 0; 918 919 // get the data and branch back 920 this_usbduxfastsub->dux_commands[LENBASE + 3] = 0x09; // branch back to state 1 921 this_usbduxfastsub->dux_commands[OPBASE + 3] = 0x03; // deceision state w data 922 this_usbduxfastsub->dux_commands[OUTBASE + 3] = 923 0xFF & rngmask; 924 this_usbduxfastsub->dux_commands[LOGBASE + 3] = 0xFF; // doesn't matter 925 } 926 break; 927 928 case 2: 929 // two channels 930 // commit data to the FIFO 931 if (CR_RANGE(cmd->chanlist[0]) > 0) 932 rngmask = 0xff - 0x04; 933 else 934 rngmask = 0xff; 935 this_usbduxfastsub->dux_commands[LENBASE + 0] = 1; 936 this_usbduxfastsub->dux_commands[OPBASE + 0] = 0x02; // data 937 this_usbduxfastsub->dux_commands[OUTBASE + 0] = 0xFF & rngmask; 938 this_usbduxfastsub->dux_commands[LOGBASE + 0] = 0; 939 940 // we have 1 state with duration 1: state 0 941 steps_tmp = steps - 1; 942 943 if (CR_RANGE(cmd->chanlist[1]) > 0) 944 rngmask = 0xff - 0x04; 945 else 946 rngmask = 0xff; 947 // do the first part of the delay 948 this_usbduxfastsub->dux_commands[LENBASE + 1] = steps_tmp / 2; 949 this_usbduxfastsub->dux_commands[OPBASE + 1] = 0; 950 this_usbduxfastsub->dux_commands[OUTBASE + 1] = 0xFE & rngmask; //count 951 this_usbduxfastsub->dux_commands[LOGBASE + 1] = 0; 952 953 // and the second part 954 this_usbduxfastsub->dux_commands[LENBASE + 2] = 955 steps_tmp - steps_tmp / 2; 956 this_usbduxfastsub->dux_commands[OPBASE + 2] = 0; 957 this_usbduxfastsub->dux_commands[OUTBASE + 2] = 0xFF & rngmask; 958 this_usbduxfastsub->dux_commands[LOGBASE + 2] = 0; 959 960 this_usbduxfastsub->dux_commands[LENBASE + 3] = 1; 961 this_usbduxfastsub->dux_commands[OPBASE + 3] = 0x02; // data 962 this_usbduxfastsub->dux_commands[OUTBASE + 3] = 0xFF & rngmask; 963 this_usbduxfastsub->dux_commands[LOGBASE + 3] = 0; 964 965 // we have 2 states with duration 1: step 6 and the IDLE state 966 steps_tmp = steps - 2; 967 968 if (CR_RANGE(cmd->chanlist[0]) > 0) 969 rngmask = 0xff - 0x04; 970 else 971 rngmask = 0xff; 972 // do the first part of the delay 973 this_usbduxfastsub->dux_commands[LENBASE + 4] = steps_tmp / 2; 974 this_usbduxfastsub->dux_commands[OPBASE + 4] = 0; 975 this_usbduxfastsub->dux_commands[OUTBASE + 4] = (0xFF - 0x02) & rngmask; //reset 976 this_usbduxfastsub->dux_commands[LOGBASE + 4] = 0; 977 978 // and the second part 979 this_usbduxfastsub->dux_commands[LENBASE + 5] = 980 steps_tmp - steps_tmp / 2; 981 this_usbduxfastsub->dux_commands[OPBASE + 5] = 0; 982 this_usbduxfastsub->dux_commands[OUTBASE + 5] = 0xFF & rngmask; 983 this_usbduxfastsub->dux_commands[LOGBASE + 5] = 0; 984 985 this_usbduxfastsub->dux_commands[LENBASE + 6] = 1; 986 this_usbduxfastsub->dux_commands[OPBASE + 6] = 0; 987 this_usbduxfastsub->dux_commands[OUTBASE + 6] = 0xFF & rngmask; 988 this_usbduxfastsub->dux_commands[LOGBASE + 6] = 0; 989 break; 990 991 case 3: 992 // three channels 993 for (j = 0; j < 1; j++) { 994 if (CR_RANGE(cmd->chanlist[j]) > 0) 995 rngmask = 0xff - 0x04; 996 else 997 rngmask = 0xff; 998 // commit data to the FIFO and do the first part of the delay 999 this_usbduxfastsub->dux_commands[LENBASE + j * 2] = 1000 steps / 2; 1001 this_usbduxfastsub->dux_commands[OPBASE + j * 2] = 0x02; // data 1002 this_usbduxfastsub->dux_commands[OUTBASE + j * 2] = 0xFF & rngmask; // no change 1003 this_usbduxfastsub->dux_commands[LOGBASE + j * 2] = 0; 1004 1005 if (CR_RANGE(cmd->chanlist[j + 1]) > 0) 1006 rngmask = 0xff - 0x04; 1007 else 1008 rngmask = 0xff; 1009 // do the second part of the delay 1010 this_usbduxfastsub->dux_commands[LENBASE + j * 2 + 1] = 1011 steps - steps / 2; 1012 this_usbduxfastsub->dux_commands[OPBASE + j * 2 + 1] = 0; // no data 1013 this_usbduxfastsub->dux_commands[OUTBASE + j * 2 + 1] = 0xFE & rngmask; //count 1014 this_usbduxfastsub->dux_commands[LOGBASE + j * 2 + 1] = 1015 0; 1016 } 1017 1018 // 2 steps with duration 1: the idele step and step 6: 1019 steps_tmp = steps - 2; 1020 // commit data to the FIFO and do the first part of the delay 1021 this_usbduxfastsub->dux_commands[LENBASE + 4] = steps_tmp / 2; 1022 this_usbduxfastsub->dux_commands[OPBASE + 4] = 0x02; // data 1023 this_usbduxfastsub->dux_commands[OUTBASE + 4] = 0xFF & rngmask; // no change 1024 this_usbduxfastsub->dux_commands[LOGBASE + 4] = 0; 1025 1026 if (CR_RANGE(cmd->chanlist[0]) > 0) 1027 rngmask = 0xff - 0x04; 1028 else 1029 rngmask = 0xff; 1030 // do the second part of the delay 1031 this_usbduxfastsub->dux_commands[LENBASE + 5] = 1032 steps_tmp - steps_tmp / 2; 1033 this_usbduxfastsub->dux_commands[OPBASE + 5] = 0; // no data 1034 this_usbduxfastsub->dux_commands[OUTBASE + 5] = (0xFF - 0x02) & rngmask; // reset 1035 this_usbduxfastsub->dux_commands[LOGBASE + 5] = 0; 1036 1037 this_usbduxfastsub->dux_commands[LENBASE + 6] = 1; 1038 this_usbduxfastsub->dux_commands[OPBASE + 6] = 0; 1039 this_usbduxfastsub->dux_commands[OUTBASE + 6] = 0xFF & rngmask; 1040 this_usbduxfastsub->dux_commands[LOGBASE + 6] = 0; 1041 1042 case 16: 1043 if (CR_RANGE(cmd->chanlist[0]) > 0) 1044 rngmask = 0xff - 0x04; 1045 else 1046 rngmask = 0xff; 1047 if (cmd->start_src == TRIG_EXT) { // we loop here until ready has been set 1048 this_usbduxfastsub->dux_commands[LENBASE + 0] = 0x01; // branch back to state 0 1049 this_usbduxfastsub->dux_commands[OPBASE + 0] = 0x01; // deceision state w/o data 1050 this_usbduxfastsub->dux_commands[OUTBASE + 0] = (0xFF - 0x02) & rngmask; // reset 1051 this_usbduxfastsub->dux_commands[LOGBASE + 0] = 0x00; // RDY0 = 0 1052 } else { // we just proceed to state 1 1053 this_usbduxfastsub->dux_commands[LENBASE + 0] = 255; // 30us reset pulse 1054 this_usbduxfastsub->dux_commands[OPBASE + 0] = 0; 1055 this_usbduxfastsub->dux_commands[OUTBASE + 0] = (0xFF - 0x02) & rngmask; // reset 1056 this_usbduxfastsub->dux_commands[LOGBASE + 0] = 0; 1057 } 1058 1059 // commit data to the FIFO 1060 this_usbduxfastsub->dux_commands[LENBASE + 1] = 1; 1061 this_usbduxfastsub->dux_commands[OPBASE + 1] = 0x02; // data 1062 this_usbduxfastsub->dux_commands[OUTBASE + 1] = 0xFF & rngmask; 1063 this_usbduxfastsub->dux_commands[LOGBASE + 1] = 0; 1064 1065 // we have 2 states with duration 1 1066 steps = steps - 2; 1067 1068 // do the first part of the delay 1069 this_usbduxfastsub->dux_commands[LENBASE + 2] = steps / 2; 1070 this_usbduxfastsub->dux_commands[OPBASE + 2] = 0; 1071 this_usbduxfastsub->dux_commands[OUTBASE + 2] = 0xFE & rngmask; 1072 this_usbduxfastsub->dux_commands[LOGBASE + 2] = 0; 1073 1074 // and the second part 1075 this_usbduxfastsub->dux_commands[LENBASE + 3] = 1076 steps - steps / 2; 1077 this_usbduxfastsub->dux_commands[OPBASE + 3] = 0; 1078 this_usbduxfastsub->dux_commands[OUTBASE + 3] = 0xFF & rngmask; 1079 this_usbduxfastsub->dux_commands[LOGBASE + 3] = 0; 1080 1081 this_usbduxfastsub->dux_commands[LENBASE + 4] = 0x09; // branch back to state 1 1082 this_usbduxfastsub->dux_commands[OPBASE + 4] = 0x01; // deceision state w/o data 1083 this_usbduxfastsub->dux_commands[OUTBASE + 4] = 0xFF & rngmask; 1084 this_usbduxfastsub->dux_commands[LOGBASE + 4] = 0xFF; // doesn't matter 1085 1086 break; 1087 1088 default: 1089 printk("comedi %d: unsupported combination of channels\n", 1090 dev->minor); 1091 up(&this_usbduxfastsub->sem); 1092 return -EFAULT; 1093 } 1094 1095#ifdef CONFIG_COMEDI_DEBUG 1096 printk("comedi %d: sending commands to the usb device\n", dev->minor); 1097#endif 1098 // 0 means that the AD commands are sent 1099 result = send_dux_commands(this_usbduxfastsub, SENDADCOMMANDS); 1100 if (result < 0) { 1101 printk("comedi%d: adc command could not be submitted. Aborting...\n", dev->minor); 1102 up(&this_usbduxfastsub->sem); 1103 return result; 1104 } 1105 if (cmd->stop_src == TRIG_COUNT) { 1106 this_usbduxfastsub->ai_sample_count = 1107 (cmd->stop_arg) * (cmd->scan_end_arg); 1108 if (usbduxfastsub->ai_sample_count < 1) { 1109 printk("comedi%d: (cmd->stop_arg)*(cmd->scan_end_arg)<1, aborting.\n", dev->minor); 1110 up(&this_usbduxfastsub->sem); 1111 return -EFAULT; 1112 } 1113 this_usbduxfastsub->ai_continous = 0; 1114 } else { 1115 // continous aquisition 1116 this_usbduxfastsub->ai_continous = 1; 1117 this_usbduxfastsub->ai_sample_count = 0; 1118 } 1119 1120 if ((cmd->start_src == TRIG_NOW) || (cmd->start_src == TRIG_EXT)) { 1121 // enable this acquisition operation 1122 this_usbduxfastsub->ai_cmd_running = 1; 1123 ret = usbduxfastsub_submit_InURBs(this_usbduxfastsub); 1124 if (ret < 0) { 1125 this_usbduxfastsub->ai_cmd_running = 0; 1126 // fixme: unlink here?? 1127 up(&this_usbduxfastsub->sem); 1128 return ret; 1129 } 1130 s->async->inttrig = NULL; 1131 } else { 1132 /* TRIG_INT */ 1133 // don't enable the acquision operation 1134 // wait for an internal signal 1135 s->async->inttrig = usbduxfast_ai_inttrig; 1136 } 1137 up(&this_usbduxfastsub->sem); 1138 1139 return 0; 1140} 1141 1142/* Mode 0 is used to get a single conversion on demand */ 1143static int usbduxfast_ai_insn_read(comedi_device * dev, 1144 comedi_subdevice * s, comedi_insn * insn, lsampl_t * data) 1145{ 1146 int i, j, n, actual_length; 1147 int chan, range, rngmask; 1148 int err; 1149 usbduxfastsub_t *usbduxfastsub = dev->private; 1150 1151 if (!usbduxfastsub) { 1152 printk("comedi%d: ai_insn_read: no usb dev.\n", dev->minor); 1153 return -ENODEV; 1154 } 1155#ifdef CONFIG_COMEDI_DEBUG 1156 printk("comedi%d: ai_insn_read, insn->n=%d, insn->subdev=%d\n", 1157 dev->minor, insn->n, insn->subdev); 1158#endif 1159 down(&usbduxfastsub->sem); 1160 if (!(usbduxfastsub->probed)) { 1161 up(&usbduxfastsub->sem); 1162 return -ENODEV; 1163 } 1164 if (usbduxfastsub->ai_cmd_running) { 1165 printk("comedi%d: ai_insn_read not possible. Async Command is running.\n", dev->minor); 1166 up(&usbduxfastsub->sem); 1167 return -EBUSY; 1168 } 1169 // sample one channel 1170 chan = CR_CHAN(insn->chanspec); 1171 range = CR_RANGE(insn->chanspec); 1172 // set command for the first channel 1173 1174 if (range > 0) 1175 rngmask = 0xff - 0x04; 1176 else 1177 rngmask = 0xff; 1178 // commit data to the FIFO 1179 usbduxfastsub->dux_commands[LENBASE + 0] = 1; 1180 usbduxfastsub->dux_commands[OPBASE + 0] = 0x02; // data 1181 usbduxfastsub->dux_commands[OUTBASE + 0] = 0xFF & rngmask; 1182 usbduxfastsub->dux_commands[LOGBASE + 0] = 0; 1183 1184 // do the first part of the delay 1185 usbduxfastsub->dux_commands[LENBASE + 1] = 12; 1186 usbduxfastsub->dux_commands[OPBASE + 1] = 0; 1187 usbduxfastsub->dux_commands[OUTBASE + 1] = 0xFE & rngmask; 1188 usbduxfastsub->dux_commands[LOGBASE + 1] = 0; 1189 1190 usbduxfastsub->dux_commands[LENBASE + 2] = 1; 1191 usbduxfastsub->dux_commands[OPBASE + 2] = 0; 1192 usbduxfastsub->dux_commands[OUTBASE + 2] = 0xFE & rngmask; 1193 usbduxfastsub->dux_commands[LOGBASE + 2] = 0; 1194 1195 usbduxfastsub->dux_commands[LENBASE + 3] = 1; 1196 usbduxfastsub->dux_commands[OPBASE + 3] = 0; 1197 usbduxfastsub->dux_commands[OUTBASE + 3] = 0xFE & rngmask; 1198 usbduxfastsub->dux_commands[LOGBASE + 3] = 0; 1199 1200 usbduxfastsub->dux_commands[LENBASE + 4] = 1; 1201 usbduxfastsub->dux_commands[OPBASE + 4] = 0; 1202 usbduxfastsub->dux_commands[OUTBASE + 4] = 0xFE & rngmask; 1203 usbduxfastsub->dux_commands[LOGBASE + 4] = 0; 1204 1205 // second part 1206 usbduxfastsub->dux_commands[LENBASE + 5] = 12; 1207 usbduxfastsub->dux_commands[OPBASE + 5] = 0; 1208 usbduxfastsub->dux_commands[OUTBASE + 5] = 0xFF & rngmask; 1209 usbduxfastsub->dux_commands[LOGBASE + 5] = 0; 1210 1211 usbduxfastsub->dux_commands[LENBASE + 6] = 1; 1212 usbduxfastsub->dux_commands[OPBASE + 6] = 0; 1213 usbduxfastsub->dux_commands[OUTBASE + 6] = 0xFF & rngmask; 1214 usbduxfastsub->dux_commands[LOGBASE + 0] = 0; 1215 1216#ifdef CONFIG_COMEDI_DEBUG 1217 printk("comedi %d: sending commands to the usb device\n", dev->minor); 1218#endif 1219 // 0 means that the AD commands are sent 1220 err = send_dux_commands(usbduxfastsub, SENDADCOMMANDS); 1221 if (err < 0) { 1222 printk("comedi%d: adc command could not be submitted. Aborting...\n", dev->minor); 1223 up(&usbduxfastsub->sem); 1224 return err; 1225 } 1226#ifdef CONFIG_COMEDI_DEBUG 1227 printk("comedi%d: usbduxfast: submitting in-urb: %x,%x\n", 1228 usbduxfastsub->comedidev->minor, 1229 (int)(usbduxfastsub->urbIn->context), 1230 (int)(usbduxfastsub->urbIn->dev)); 1231#endif 1232 for (i = 0; i < PACKETS_TO_IGNORE; i++) { 1233 err = usb_bulk_msg(usbduxfastsub->usbdev, 1234 usb_rcvbulkpipe(usbduxfastsub->usbdev, 1235 BULKINEP), 1236 usbduxfastsub->transfer_buffer, SIZEINBUF, 1237 &actual_length, 10000); 1238 if (err < 0) { 1239 printk("comedi%d: insn timeout. No data.\n", 1240 dev->minor); 1241 up(&usbduxfastsub->sem); 1242 return err; 1243 } 1244 } 1245 // data points 1246 for (i = 0; i < insn->n;) { 1247 err = usb_bulk_msg(usbduxfastsub->usbdev, 1248 usb_rcvbulkpipe(usbduxfastsub->usbdev, 1249 BULKINEP), 1250 usbduxfastsub->transfer_buffer, SIZEINBUF, 1251 &actual_length, 10000); 1252 if (err < 0) { 1253 printk("comedi%d: insn data error: %d\n", 1254 dev->minor, err); 1255 up(&usbduxfastsub->sem); 1256 return err; 1257 } 1258 n = actual_length / sizeof(uint16_t); 1259 if ((n % 16) != 0) { 1260 printk("comedi%d: insn data packet corrupted.\n", 1261 dev->minor); 1262 up(&usbduxfastsub->sem); 1263 return -EINVAL; 1264 } 1265 for (j = chan; (j < n) && (i < insn->n); j = j + 16) { 1266 data[i] = 1267 ((uint16_t *) (usbduxfastsub-> 1268 transfer_buffer))[j]; 1269 i++; 1270 } 1271 } 1272 up(&usbduxfastsub->sem); 1273 return i; 1274} 1275 1276static unsigned hex2unsigned(char *h) 1277{ 1278 unsigned hi, lo; 1279 if (h[0] > '9') { 1280 hi = h[0] - 'A' + 0x0a; 1281 } else { 1282 hi = h[0] - '0'; 1283 } 1284 if (h[1] > '9') { 1285 lo = h[1] - 'A' + 0x0a; 1286 } else { 1287 lo = h[1] - '0'; 1288 } 1289 return hi * 0x10 + lo; 1290} 1291 1292// for FX2 1293#define FIRMWARE_MAX_LEN 0x2000 1294 1295// taken from David Brownell's fxload and adjusted for this driver 1296static int read_firmware(usbduxfastsub_t * usbduxfastsub, void *firmwarePtr, 1297 long size) 1298{ 1299 int i = 0; 1300 unsigned char *fp = (char *)firmwarePtr; 1301 unsigned char *firmwareBinary = NULL; 1302 int res = 0; 1303 int maxAddr = 0; 1304 1305 firmwareBinary = kmalloc(FIRMWARE_MAX_LEN, GFP_KERNEL); 1306 if (!firmwareBinary) { 1307 printk("comedi_: usbduxfast: mem alloc for firmware failed\n"); 1308 return -ENOMEM; 1309 } 1310 1311 for (;;) { 1312 char buf[256], *cp; 1313 char type; 1314 int len; 1315 int idx, off; 1316 int j = 0; 1317 1318 // get one line 1319 while ((i < size) && (fp[i] != 13) && (fp[i] != 10)) { 1320 buf[j] = fp[i]; 1321 i++; 1322 j++; 1323 if (j >= sizeof(buf)) { 1324 printk("comedi_: usbduxfast: bogus firmware file!\n"); 1325 return -1; 1326 } 1327 } 1328 // get rid of LF/CR/... 1329 while ((i < size) && ((fp[i] == 13) || (fp[i] == 10) 1330 || (fp[i] == 0))) { 1331 i++; 1332 } 1333 1334 buf[j] = 0; 1335 //printk("comedi_: buf=%s\n",buf); 1336 1337 /* EXTENSION: "# comment-till-end-of-line", for copyrights etc */ 1338 if (buf[0] == '#') 1339 continue; 1340 1341 if (buf[0] != ':') { 1342 printk("comedi_: usbduxfast: upload: not an ihex record: %s", buf); 1343 return -EFAULT; 1344 } 1345 1346 /* Read the length field (up to 16 bytes) */ 1347 len = hex2unsigned(buf + 1); 1348 1349 /* Read the target offset */ 1350 off = (hex2unsigned(buf + 3) * 0x0100) + hex2unsigned(buf + 5); 1351 1352 if ((off + len) > maxAddr) { 1353 maxAddr = off + len; 1354 } 1355 1356 if (maxAddr >= FIRMWARE_MAX_LEN) { 1357 printk("comedi_: usbduxfast: firmware upload goes beyond FX2 RAM boundaries."); 1358 return -EFAULT; 1359 } 1360 //printk("comedi_: usbduxfast: off=%x, len=%x:",off,len); 1361 1362 /* Read the record type */ 1363 type = hex2unsigned(buf + 7); 1364 1365 /* If this is an EOF record, then make it so. */ 1366 if (type == 1) { 1367 break; 1368 } 1369 1370 if (type != 0) { 1371 printk("comedi_: usbduxfast: unsupported record type: %u\n", type); 1372 return -EFAULT; 1373 } 1374 1375 for (idx = 0, cp = buf + 9; idx < len; idx += 1, cp += 2) { 1376 firmwareBinary[idx + off] = hex2unsigned(cp); 1377 //printk("%02x ",firmwareBinary[idx+off]); 1378 } 1379 //printk("\n"); 1380 1381 if (i >= size) { 1382 printk("comedi_: usbduxfast: unexpected end of hex file\n"); 1383 break; 1384 } 1385 1386 } 1387 res = firmwareUpload(usbduxfastsub, firmwareBinary, maxAddr + 1); 1388 kfree(firmwareBinary); 1389 return res; 1390} 1391 1392static void tidy_up(usbduxfastsub_t * usbduxfastsub_tmp) 1393{ 1394#ifdef CONFIG_COMEDI_DEBUG 1395 printk("comedi_: usbduxfast: tiding up\n"); 1396#endif 1397 if (!usbduxfastsub_tmp) { 1398 return; 1399 } 1400#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0) 1401 // shows the usb subsystem that the driver is down 1402 if (usbduxfastsub_tmp->interface) { 1403 usb_set_intfdata(usbduxfastsub_tmp->interface, NULL); 1404 } 1405#endif 1406 1407 usbduxfastsub_tmp->probed = 0; 1408 1409 if (usbduxfastsub_tmp->urbIn) { 1410#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,8) 1411 // waits until a running transfer is over 1412 // thus, under 2.4 hotplugging while a command 1413 // is running is not safe 1414 usb_kill_urb(usbduxfastsub_tmp->urbIn); 1415#endif 1416 if (usbduxfastsub_tmp->transfer_buffer) { 1417 kfree(usbduxfastsub_tmp->transfer_buffer); 1418 usbduxfastsub_tmp->transfer_buffer = NULL; 1419 } 1420 usb_free_urb(usbduxfastsub_tmp->urbIn); 1421 usbduxfastsub_tmp->urbIn = NULL; 1422 } 1423 if (usbduxfastsub_tmp->insnBuffer) { 1424 kfree(usbduxfastsub_tmp->insnBuffer); 1425 usbduxfastsub_tmp->insnBuffer = NULL; 1426 } 1427 if (usbduxfastsub_tmp->dux_commands) { 1428 kfree(usbduxfastsub_tmp->dux_commands); 1429 usbduxfastsub_tmp->dux_commands = NULL; 1430 } 1431 usbduxfastsub_tmp->ai_cmd_running = 0; 1432} 1433 1434// allocate memory for the urbs and initialise them 1435#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0) 1436static void *usbduxfastsub_probe(struct usb_device *udev, 1437 unsigned int interfnum, const struct usb_device_id *id) 1438{ 1439#else 1440static int usbduxfastsub_probe(struct usb_interface *uinterf, 1441 const struct usb_device_id *id) 1442{ 1443 struct usb_device *udev = interface_to_usbdev(uinterf); 1444#endif 1445 int i; 1446 int index; 1447 1448 if (udev->speed != USB_SPEED_HIGH) { 1449 printk("comedi_: usbduxfast_: This driver needs USB 2.0 to operate. Aborting...\n"); 1450 return -ENODEV; 1451 } 1452#ifdef CONFIG_COMEDI_DEBUG 1453 printk("comedi_: usbduxfast_: finding a free structure for the usb-device\n"); 1454#endif 1455 down(&start_stop_sem); 1456 // look for a free place in the usbduxfast array 1457 index = -1; 1458 for (i = 0; i < NUMUSBDUXFAST; i++) { 1459 if (!(usbduxfastsub[i].probed)) { 1460 index = i; 1461 break; 1462 } 1463 } 1464 1465 // no more space 1466 if (index == -1) { 1467 printk("Too many usbduxfast-devices connected.\n"); 1468 up(&start_stop_sem); 1469 return -EMFILE; 1470 } 1471#ifdef CONFIG_COMEDI_DEBUG 1472 printk("comedi_: usbduxfast: usbduxfastsub[%d] is ready to connect to comedi.\n", index); 1473#endif 1474 1475 init_MUTEX(&(usbduxfastsub[index].sem)); 1476 // save a pointer to the usb device 1477 usbduxfastsub[index].usbdev = udev; 1478 1479#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0) 1480 // save the interface number 1481 usbduxfastsub[index].ifnum = interfnum; 1482#else 1483 // 2.6: save the interface itself 1484 usbduxfastsub[index].interface = uinterf; 1485 // get the interface number from the interface 1486 usbduxfastsub[index].ifnum = uinterf->altsetting->desc.bInterfaceNumber; 1487 // hand the private data over to the usb subsystem 1488 // will be needed for disconnect 1489 usb_set_intfdata(uinterf, &(usbduxfastsub[index])); 1490#endif 1491 1492#ifdef CONFIG_COMEDI_DEBUG 1493 printk("comedi_: usbduxfast: ifnum=%d\n", usbduxfastsub[index].ifnum); 1494#endif 1495 // create space for the commands going to the usb device 1496 usbduxfastsub[index].dux_commands = kmalloc(SIZEOFDUXBUFFER, 1497 GFP_KERNEL); 1498 if (!usbduxfastsub[index].dux_commands) { 1499 printk("comedi_: usbduxfast: error alloc space for dac commands\n"); 1500 tidy_up(&(usbduxfastsub[index])); 1501 up(&start_stop_sem); 1502 return -ENOMEM; 1503 } 1504 // create space of the instruction buffer 1505 usbduxfastsub[index].insnBuffer = kmalloc(SIZEINSNBUF, GFP_KERNEL); 1506 if (!(usbduxfastsub[index].insnBuffer)) { 1507 printk("comedi_: usbduxfast: could not alloc space for insnBuffer\n"); 1508 tidy_up(&(usbduxfastsub[index])); 1509 up(&start_stop_sem); 1510 return -ENOMEM; 1511 } 1512 // setting to alternate setting 1: enabling bulk ep 1513 i = usb_set_interface(usbduxfastsub[index].usbdev, 1514 usbduxfastsub[index].ifnum, 1); 1515 if (i < 0) { 1516 printk("comedi_: usbduxfast%d: could not switch to alternate setting 1.\n", index); 1517 tidy_up(&(usbduxfastsub[index])); 1518 up(&start_stop_sem); 1519 return -ENODEV; 1520 } 1521 usbduxfastsub[index].urbIn = usb_alloc_urb(0, GFP_KERNEL); 1522 if (usbduxfastsub[index].urbIn == NULL) { 1523 printk("comedi_: usbduxfast%d: Could not alloc. urb\n", index); 1524 tidy_up(&(usbduxfastsub[index])); 1525 up(&start_stop_sem); 1526 return -ENOMEM; 1527 } 1528 usbduxfastsub[index].transfer_buffer = kmalloc(SIZEINBUF, GFP_KERNEL); 1529 if (!(usbduxfastsub[index].transfer_buffer)) { 1530 printk("comedi_: usbduxfast%d: could not alloc. transb.\n", 1531 index); 1532 tidy_up(&(usbduxfastsub[index])); 1533 up(&start_stop_sem); 1534 return -ENOMEM; 1535 } 1536 // we've reached the bottom of the function 1537 usbduxfastsub[index].probed = 1; 1538 up(&start_stop_sem); 1539 printk("comedi_: usbduxfast%d has been successfully initialized.\n", 1540 index); 1541#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0) 1542 return (void *)(&usbduxfastsub[index]); 1543#else 1544 // success 1545 return 0; 1546#endif 1547} 1548 1549#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0) 1550static void usbduxfastsub_disconnect(struct usb_device *udev, void *ptr) 1551{ 1552 usbduxfastsub_t *usbduxfastsub_tmp = (usbduxfastsub_t *) ptr; 1553#else 1554static void usbduxfastsub_disconnect(struct usb_interface *intf) 1555{ 1556 usbduxfastsub_t *usbduxfastsub_tmp = usb_get_intfdata(intf); 1557 struct usb_device *udev = interface_to_usbdev(intf); 1558#endif 1559 if (!usbduxfastsub_tmp) { 1560 printk("comedi_: usbduxfast: disconnect called with null pointer.\n"); 1561 return; 1562 } 1563 if (usbduxfastsub_tmp->usbdev != udev) { 1564 printk("comedi_: usbduxfast: BUG! called with wrong ptr!!!\n"); 1565 return; 1566 } 1567 down(&start_stop_sem); 1568 down(&usbduxfastsub_tmp->sem); 1569 tidy_up(usbduxfastsub_tmp); 1570 up(&usbduxfastsub_tmp->sem); 1571 up(&start_stop_sem); 1572#ifdef CONFIG_COMEDI_DEBUG 1573 printk("comedi_: usbduxfast: disconnected from the usb\n"); 1574#endif 1575} 1576 1577// is called when comedi-config is called 1578static int usbduxfast_attach(comedi_device * dev, comedi_devconfig * it) 1579{ 1580 int ret; 1581 int index; 1582 int i; 1583 comedi_subdevice *s = NULL; 1584 dev->private = NULL; 1585 1586 down(&start_stop_sem); 1587 // find a valid device which has been detected by the probe function of the usb 1588 index = -1; 1589 for (i = 0; i < NUMUSBDUXFAST; i++) { 1590 if ((usbduxfastsub[i].probed) && (!usbduxfastsub[i].attached)) { 1591 index = i; 1592 break; 1593 } 1594 } 1595 1596 if (index < 0) { 1597 printk("comedi%d: usbduxfast: error: attach failed, no usbduxfast devs connected to the usb bus.\n", dev->minor); 1598 up(&start_stop_sem); 1599 return -ENODEV; 1600 } 1601 1602 down(&(usbduxfastsub[index].sem)); 1603 // pointer back to the corresponding comedi device 1604 usbduxfastsub[index].comedidev = dev; 1605 1606 // trying to upload the firmware into the chip 1607 if (comedi_aux_data(it->options, 0) && 1608 it->options[COMEDI_DEVCONF_AUX_DATA_LENGTH]) { 1609 read_firmware(usbduxfastsub, 1610 comedi_aux_data(it->options, 0), 1611 it->options[COMEDI_DEVCONF_AUX_DATA_LENGTH]); 1612 } 1613 1614 dev->board_name = BOARDNAME; 1615 1616 /* set number of subdevices */ 1617 dev->n_subdevices = N_SUBDEVICES; 1618 1619 // allocate space for the subdevices 1620 if ((ret = alloc_subdevices(dev, N_SUBDEVICES)) < 0) { 1621 printk("comedi%d: usbduxfast: error alloc space for subdev\n", 1622 dev->minor); 1623 up(&start_stop_sem); 1624 return ret; 1625 } 1626 1627 printk("comedi%d: usbduxfast: usb-device %d is attached to comedi.\n", 1628 dev->minor, index); 1629 // private structure is also simply the usb-structure 1630 dev->private = usbduxfastsub + index; 1631 // the first subdevice is the A/D converter 1632 s = dev->subdevices + SUBDEV_AD; 1633 // the URBs get the comedi subdevice 1634 // which is responsible for reading 1635 // this is the subdevice which reads data 1636 dev->read_subdev = s; 1637 // the subdevice receives as private structure the 1638 // usb-structure 1639 s->private = NULL; 1640 // analog input 1641 s->type = COMEDI_SUBD_AI; 1642 // readable and ref is to ground 1643 s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_CMD_READ; 1644 // 16 channels 1645 s->n_chan = 16; 1646 // length of the channellist 1647 s->len_chanlist = 16; 1648 // callback functions 1649 s->insn_read = usbduxfast_ai_insn_read; 1650 s->do_cmdtest = usbduxfast_ai_cmdtest; 1651 s->do_cmd = usbduxfast_ai_cmd; 1652 s->cancel = usbduxfast_ai_cancel; 1653 // max value from the A/D converter (12bit+1 bit for overflow) 1654 s->maxdata = 0x1000; 1655 // range table to convert to physical units 1656 s->range_table = &range_usbduxfast_ai_range; 1657 1658 // finally decide that it's attached 1659 usbduxfastsub[index].attached = 1; 1660 1661 up(&(usbduxfastsub[index].sem)); 1662 1663 up(&start_stop_sem); 1664 1665 printk("comedi%d: successfully attached to usbduxfast.\n", dev->minor); 1666 1667 return 0; 1668} 1669 1670static int usbduxfast_detach(comedi_device * dev) 1671{ 1672 usbduxfastsub_t *usbduxfastsub_tmp; 1673 1674#ifdef CONFIG_COMEDI_DEBUG 1675 printk("comedi%d: usbduxfast: detach usb device\n", dev->minor); 1676#endif 1677 1678 if (!dev) { 1679 printk("comedi?: usbduxfast: detach without dev variable...\n"); 1680 return -EFAULT; 1681 } 1682 1683 usbduxfastsub_tmp = dev->private; 1684 if (!usbduxfastsub_tmp) { 1685 printk("comedi?: usbduxfast: detach without ptr to usbduxfastsub[]\n"); 1686 return -EFAULT; 1687 } 1688 1689 down(&usbduxfastsub_tmp->sem); 1690 down(&start_stop_sem); 1691 // Don't allow detach to free the private structure 1692 // It's one entry of of usbduxfastsub[] 1693 dev->private = NULL; 1694 usbduxfastsub_tmp->attached = 0; 1695 usbduxfastsub_tmp->comedidev = NULL; 1696#ifdef CONFIG_COMEDI_DEBUG 1697 printk("comedi%d: usbduxfast: detach: successfully removed\n", 1698 dev->minor); 1699#endif 1700 up(&start_stop_sem); 1701 up(&usbduxfastsub_tmp->sem); 1702 return 0; 1703} 1704 1705/* main driver struct */ 1706static comedi_driver driver_usbduxfast = { 1707 driver_name:"usbduxfast", 1708 module:THIS_MODULE, 1709 attach:usbduxfast_attach, 1710 detach:usbduxfast_detach, 1711}; 1712 1713static void init_usb_devices(void) 1714{ 1715 int index; 1716#ifdef CONFIG_COMEDI_DEBUG 1717 printk("comedi_: usbduxfast: setting all possible devs to invalid\n"); 1718#endif 1719 // all devices entries are invalid to begin with 1720 // they will become valid by the probe function 1721 // and then finally by the attach-function 1722 for (index = 0; index < NUMUSBDUXFAST; index++) { 1723 memset(&(usbduxfastsub[index]), 0x00, 1724 sizeof(usbduxfastsub[index])); 1725 init_MUTEX(&(usbduxfastsub[index].sem)); 1726 } 1727} 1728 1729// Table with the USB-devices: just now only testing IDs 1730static struct usb_device_id usbduxfastsub_table[] = { 1731 // { USB_DEVICE(0x4b4, 0x8613), //testing 1732 // }, 1733 {USB_DEVICE(0x13d8, 0x0010) //real ID 1734 }, 1735 {USB_DEVICE(0x13d8, 0x0011) //real ID 1736 }, 1737 {} /* Terminating entry */ 1738}; 1739 1740MODULE_DEVICE_TABLE(usb, usbduxfastsub_table); 1741 1742// The usbduxfastsub-driver 1743static struct usb_driver usbduxfastsub_driver = { 1744#ifdef COMEDI_HAVE_USB_DRIVER_OWNER 1745 owner:THIS_MODULE, 1746#endif 1747 name:BOARDNAME, 1748 probe:usbduxfastsub_probe, 1749 disconnect:usbduxfastsub_disconnect, 1750 id_table:usbduxfastsub_table, 1751}; 1752 1753// Can't use the nice macro as I have also to initialise the USB 1754// subsystem: 1755// registering the usb-system _and_ the comedi-driver 1756static int init_usbduxfast(void) 1757{ 1758 printk(KERN_INFO KBUILD_MODNAME ": " 1759 DRIVER_VERSION ":" DRIVER_DESC "\n"); 1760 init_usb_devices(); 1761 usb_register(&usbduxfastsub_driver); 1762 comedi_driver_register(&driver_usbduxfast); 1763 return 0; 1764} 1765 1766// deregistering the comedi driver and the usb-subsystem 1767static void exit_usbduxfast(void) 1768{ 1769 comedi_driver_unregister(&driver_usbduxfast); 1770 usb_deregister(&usbduxfastsub_driver); 1771} 1772 1773module_init(init_usbduxfast); 1774module_exit(exit_usbduxfast); 1775 1776MODULE_AUTHOR(DRIVER_AUTHOR); 1777MODULE_DESCRIPTION(DRIVER_DESC); 1778MODULE_LICENSE("GPL"); 1779