1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * usbdux.c 4 * Copyright (C) 2003-2014 Bernd Porr, mail@berndporr.me.uk 5 */ 6 7 /* 8 * Driver: usbdux 9 * Description: University of Stirling USB DAQ & INCITE Technology Limited 10 * Devices: [ITL] USB-DUX (usbdux) 11 * Author: Bernd Porr <mail@berndporr.me.uk> 12 * Updated: 10 Oct 2014 13 * Status: Stable 14 * 15 * Connection scheme for the counter at the digital port: 16 * 0=/CLK0, 1=UP/DOWN0, 2=RESET0, 4=/CLK1, 5=UP/DOWN1, 6=RESET1. 17 * The sampling rate of the counter is approximately 500Hz. 18 * 19 * Note that under USB2.0 the length of the channel list determines 20 * the max sampling rate. If you sample only one channel you get 8kHz 21 * sampling rate. If you sample two channels you get 4kHz and so on. 22 */ 23 24 /* 25 * I must give credit here to Chris Baugher who 26 * wrote the driver for AT-MIO-16d. I used some parts of this 27 * driver. I also must give credits to David Brownell 28 * who supported me with the USB development. 29 * 30 * Bernd Porr 31 * 32 * 33 * Revision history: 34 * 0.94: D/A output should work now with any channel list combinations 35 * 0.95: .owner commented out for kernel vers below 2.4.19 36 * sanity checks in ai/ao_cmd 37 * 0.96: trying to get it working with 2.6, moved all memory alloc to comedi's 38 * attach final USB IDs 39 * moved memory allocation completely to the corresponding comedi 40 * functions firmware upload is by fxload and no longer by comedi (due to 41 * enumeration) 42 * 0.97: USB IDs received, adjusted table 43 * 0.98: SMP, locking, memory alloc: moved all usb memory alloc 44 * to the usb subsystem and moved all comedi related memory 45 * alloc to comedi. 46 * | kernel | registration | usbdux-usb | usbdux-comedi | comedi | 47 * 0.99: USB 2.0: changed protocol to isochronous transfer 48 * IRQ transfer is too buggy and too risky in 2.0 49 * for the high speed ISO transfer is now a working version 50 * available 51 * 0.99b: Increased the iso transfer buffer for high sp.to 10 buffers. Some VIA 52 * chipsets miss out IRQs. Deeper buffering is needed. 53 * 1.00: full USB 2.0 support for the A/D converter. Now: max 8kHz sampling 54 * rate. 55 * Firmware vers 1.00 is needed for this. 56 * Two 16 bit up/down/reset counter with a sampling rate of 1kHz 57 * And loads of cleaning up, in particular streamlining the 58 * bulk transfers. 59 * 1.1: moved EP4 transfers to EP1 to make space for a PWM output on EP4 60 * 1.2: added PWM support via EP4 61 * 2.0: PWM seems to be stable and is not interfering with the other functions 62 * 2.1: changed PWM API 63 * 2.2: added firmware kernel request to fix an udev problem 64 * 2.3: corrected a bug in bulk timeouts which were far too short 65 * 2.4: fixed a bug which causes the driver to hang when it ran out of data. 66 * Thanks to Jan-Matthias Braun and Ian to spot the bug and fix it. 67 * 68 */ 69 70 #include <linux/kernel.h> 71 #include <linux/module.h> 72 #include <linux/slab.h> 73 #include <linux/input.h> 74 #include <linux/fcntl.h> 75 #include <linux/compiler.h> 76 #include <linux/comedi/comedi_usb.h> 77 78 /* constants for firmware upload and download */ 79 #define USBDUX_FIRMWARE "usbdux_firmware.bin" 80 #define USBDUX_FIRMWARE_MAX_LEN 0x2000 81 #define USBDUX_FIRMWARE_CMD 0xa0 82 #define VENDOR_DIR_IN 0xc0 83 #define VENDOR_DIR_OUT 0x40 84 #define USBDUX_CPU_CS 0xe600 85 86 /* usbdux bulk transfer commands */ 87 #define USBDUX_CMD_MULT_AI 0 88 #define USBDUX_CMD_AO 1 89 #define USBDUX_CMD_DIO_CFG 2 90 #define USBDUX_CMD_DIO_BITS 3 91 #define USBDUX_CMD_SINGLE_AI 4 92 #define USBDUX_CMD_TIMER_RD 5 93 #define USBDUX_CMD_TIMER_WR 6 94 #define USBDUX_CMD_PWM_ON 7 95 #define USBDUX_CMD_PWM_OFF 8 96 97 /* timeout for the USB-transfer in ms */ 98 #define BULK_TIMEOUT 1000 99 100 /* 300Hz max frequ under PWM */ 101 #define MIN_PWM_PERIOD ((long)(1E9 / 300)) 102 103 /* Default PWM frequency */ 104 #define PWM_DEFAULT_PERIOD ((long)(1E9 / 100)) 105 106 /* Size of one A/D value */ 107 #define SIZEADIN ((sizeof(u16))) 108 109 /* 110 * Size of the input-buffer IN BYTES 111 * Always multiple of 8 for 8 microframes which is needed in the highspeed mode 112 */ 113 #define SIZEINBUF (8 * SIZEADIN) 114 115 /* 16 bytes. */ 116 #define SIZEINSNBUF 16 117 118 /* size of one value for the D/A converter: channel and value */ 119 #define SIZEDAOUT ((sizeof(u8) + sizeof(u16))) 120 121 /* 122 * Size of the output-buffer in bytes 123 * Actually only the first 4 triplets are used but for the 124 * high speed mode we need to pad it to 8 (microframes). 125 */ 126 #define SIZEOUTBUF (8 * SIZEDAOUT) 127 128 /* 129 * Size of the buffer for the dux commands: just now max size is determined 130 * by the analogue out + command byte + panic bytes... 131 */ 132 #define SIZEOFDUXBUFFER (8 * SIZEDAOUT + 2) 133 134 /* Number of in-URBs which receive the data: min=2 */ 135 #define NUMOFINBUFFERSFULL 5 136 137 /* Number of out-URBs which send the data: min=2 */ 138 #define NUMOFOUTBUFFERSFULL 5 139 140 /* Number of in-URBs which receive the data: min=5 */ 141 /* must have more buffers due to buggy USB ctr */ 142 #define NUMOFINBUFFERSHIGH 10 143 144 /* Number of out-URBs which send the data: min=5 */ 145 /* must have more buffers due to buggy USB ctr */ 146 #define NUMOFOUTBUFFERSHIGH 10 147 148 /* number of retries to get the right dux command */ 149 #define RETRIES 10 150 151 static const struct comedi_lrange range_usbdux_ai_range = { 152 4, { 153 BIP_RANGE(4.096), 154 BIP_RANGE(4.096 / 2), 155 UNI_RANGE(4.096), 156 UNI_RANGE(4.096 / 2) 157 } 158 }; 159 160 static const struct comedi_lrange range_usbdux_ao_range = { 161 2, { 162 BIP_RANGE(4.096), 163 UNI_RANGE(4.096) 164 } 165 }; 166 167 struct usbdux_private { 168 /* actual number of in-buffers */ 169 int n_ai_urbs; 170 /* actual number of out-buffers */ 171 int n_ao_urbs; 172 /* ISO-transfer handling: buffers */ 173 struct urb **ai_urbs; 174 struct urb **ao_urbs; 175 /* pwm-transfer handling */ 176 struct urb *pwm_urb; 177 /* PWM period */ 178 unsigned int pwm_period; 179 /* PWM internal delay for the GPIF in the FX2 */ 180 u8 pwm_delay; 181 /* size of the PWM buffer which holds the bit pattern */ 182 int pwm_buf_sz; 183 /* input buffer for the ISO-transfer */ 184 __le16 *in_buf; 185 /* input buffer for single insn */ 186 __le16 *insn_buf; 187 188 unsigned int high_speed:1; 189 unsigned int ai_cmd_running:1; 190 unsigned int ao_cmd_running:1; 191 unsigned int pwm_cmd_running:1; 192 193 /* time between samples in units of the timer */ 194 unsigned int ai_timer; 195 unsigned int ao_timer; 196 /* counter between aquisitions */ 197 unsigned int ai_counter; 198 unsigned int ao_counter; 199 /* interval in frames/uframes */ 200 unsigned int ai_interval; 201 /* commands */ 202 u8 *dux_commands; 203 struct mutex mut; 204 }; 205 206 static void usbdux_unlink_urbs(struct urb **urbs, int num_urbs) 207 { 208 int i; 209 210 for (i = 0; i < num_urbs; i++) 211 usb_kill_urb(urbs[i]); 212 } 213 214 static void usbdux_ai_stop(struct comedi_device *dev, int do_unlink) 215 { 216 struct usbdux_private *devpriv = dev->private; 217 218 if (do_unlink && devpriv->ai_urbs) 219 usbdux_unlink_urbs(devpriv->ai_urbs, devpriv->n_ai_urbs); 220 221 devpriv->ai_cmd_running = 0; 222 } 223 224 static int usbdux_ai_cancel(struct comedi_device *dev, 225 struct comedi_subdevice *s) 226 { 227 struct usbdux_private *devpriv = dev->private; 228 229 /* prevent other CPUs from submitting new commands just now */ 230 mutex_lock(&devpriv->mut); 231 /* unlink only if the urb really has been submitted */ 232 usbdux_ai_stop(dev, devpriv->ai_cmd_running); 233 mutex_unlock(&devpriv->mut); 234 235 return 0; 236 } 237 238 static void usbduxsub_ai_handle_urb(struct comedi_device *dev, 239 struct comedi_subdevice *s, 240 struct urb *urb) 241 { 242 struct usbdux_private *devpriv = dev->private; 243 struct comedi_async *async = s->async; 244 struct comedi_cmd *cmd = &async->cmd; 245 int ret; 246 int i; 247 248 devpriv->ai_counter--; 249 if (devpriv->ai_counter == 0) { 250 devpriv->ai_counter = devpriv->ai_timer; 251 252 /* get the data from the USB bus and hand it over to comedi */ 253 for (i = 0; i < cmd->chanlist_len; i++) { 254 unsigned int range = CR_RANGE(cmd->chanlist[i]); 255 u16 val = le16_to_cpu(devpriv->in_buf[i]); 256 257 /* bipolar data is two's-complement */ 258 if (comedi_range_is_bipolar(s, range)) 259 val = comedi_offset_munge(s, val); 260 261 /* transfer data */ 262 if (!comedi_buf_write_samples(s, &val, 1)) 263 return; 264 } 265 266 if (cmd->stop_src == TRIG_COUNT && 267 async->scans_done >= cmd->stop_arg) 268 async->events |= COMEDI_CB_EOA; 269 } 270 271 /* if command is still running, resubmit urb */ 272 if (!(async->events & COMEDI_CB_CANCEL_MASK)) { 273 urb->dev = comedi_to_usb_dev(dev); 274 ret = usb_submit_urb(urb, GFP_ATOMIC); 275 if (ret < 0) { 276 dev_err(dev->class_dev, 277 "urb resubmit failed in int-context! err=%d\n", 278 ret); 279 if (ret == -EL2NSYNC) 280 dev_err(dev->class_dev, 281 "buggy USB host controller or bug in IRQ handler!\n"); 282 async->events |= COMEDI_CB_ERROR; 283 } 284 } 285 } 286 287 static void usbduxsub_ai_isoc_irq(struct urb *urb) 288 { 289 struct comedi_device *dev = urb->context; 290 struct comedi_subdevice *s = dev->read_subdev; 291 struct comedi_async *async = s->async; 292 struct usbdux_private *devpriv = dev->private; 293 294 /* exit if not running a command, do not resubmit urb */ 295 if (!devpriv->ai_cmd_running) 296 return; 297 298 switch (urb->status) { 299 case 0: 300 /* copy the result in the transfer buffer */ 301 memcpy(devpriv->in_buf, urb->transfer_buffer, SIZEINBUF); 302 usbduxsub_ai_handle_urb(dev, s, urb); 303 break; 304 305 case -EILSEQ: 306 /* 307 * error in the ISOchronous data 308 * we don't copy the data into the transfer buffer 309 * and recycle the last data byte 310 */ 311 dev_dbg(dev->class_dev, "CRC error in ISO IN stream\n"); 312 usbduxsub_ai_handle_urb(dev, s, urb); 313 break; 314 315 case -ECONNRESET: 316 case -ENOENT: 317 case -ESHUTDOWN: 318 case -ECONNABORTED: 319 /* after an unlink command, unplug, ... etc */ 320 async->events |= COMEDI_CB_ERROR; 321 break; 322 323 default: 324 /* a real error */ 325 dev_err(dev->class_dev, 326 "Non-zero urb status received in ai intr context: %d\n", 327 urb->status); 328 async->events |= COMEDI_CB_ERROR; 329 break; 330 } 331 332 /* 333 * comedi_handle_events() cannot be used in this driver. The (*cancel) 334 * operation would unlink the urb. 335 */ 336 if (async->events & COMEDI_CB_CANCEL_MASK) 337 usbdux_ai_stop(dev, 0); 338 339 comedi_event(dev, s); 340 } 341 342 static void usbdux_ao_stop(struct comedi_device *dev, int do_unlink) 343 { 344 struct usbdux_private *devpriv = dev->private; 345 346 if (do_unlink && devpriv->ao_urbs) 347 usbdux_unlink_urbs(devpriv->ao_urbs, devpriv->n_ao_urbs); 348 349 devpriv->ao_cmd_running = 0; 350 } 351 352 static int usbdux_ao_cancel(struct comedi_device *dev, 353 struct comedi_subdevice *s) 354 { 355 struct usbdux_private *devpriv = dev->private; 356 357 /* prevent other CPUs from submitting a command just now */ 358 mutex_lock(&devpriv->mut); 359 /* unlink only if it is really running */ 360 usbdux_ao_stop(dev, devpriv->ao_cmd_running); 361 mutex_unlock(&devpriv->mut); 362 363 return 0; 364 } 365 366 static void usbduxsub_ao_handle_urb(struct comedi_device *dev, 367 struct comedi_subdevice *s, 368 struct urb *urb) 369 { 370 struct usbdux_private *devpriv = dev->private; 371 struct comedi_async *async = s->async; 372 struct comedi_cmd *cmd = &async->cmd; 373 u8 *datap; 374 int ret; 375 int i; 376 377 devpriv->ao_counter--; 378 if (devpriv->ao_counter == 0) { 379 devpriv->ao_counter = devpriv->ao_timer; 380 381 if (cmd->stop_src == TRIG_COUNT && 382 async->scans_done >= cmd->stop_arg) { 383 async->events |= COMEDI_CB_EOA; 384 return; 385 } 386 387 /* transmit data to the USB bus */ 388 datap = urb->transfer_buffer; 389 *datap++ = cmd->chanlist_len; 390 for (i = 0; i < cmd->chanlist_len; i++) { 391 unsigned int chan = CR_CHAN(cmd->chanlist[i]); 392 unsigned short val; 393 394 if (!comedi_buf_read_samples(s, &val, 1)) { 395 dev_err(dev->class_dev, "buffer underflow\n"); 396 async->events |= COMEDI_CB_OVERFLOW; 397 return; 398 } 399 400 /* pointer to the DA */ 401 *datap++ = val & 0xff; 402 *datap++ = (val >> 8) & 0xff; 403 *datap++ = chan << 6; 404 s->readback[chan] = val; 405 } 406 } 407 408 /* if command is still running, resubmit urb for BULK transfer */ 409 if (!(async->events & COMEDI_CB_CANCEL_MASK)) { 410 urb->transfer_buffer_length = SIZEOUTBUF; 411 urb->dev = comedi_to_usb_dev(dev); 412 urb->status = 0; 413 if (devpriv->high_speed) 414 urb->interval = 8; /* uframes */ 415 else 416 urb->interval = 1; /* frames */ 417 urb->number_of_packets = 1; 418 urb->iso_frame_desc[0].offset = 0; 419 urb->iso_frame_desc[0].length = SIZEOUTBUF; 420 urb->iso_frame_desc[0].status = 0; 421 ret = usb_submit_urb(urb, GFP_ATOMIC); 422 if (ret < 0) { 423 dev_err(dev->class_dev, 424 "ao urb resubm failed in int-cont. ret=%d", 425 ret); 426 if (ret == -EL2NSYNC) 427 dev_err(dev->class_dev, 428 "buggy USB host controller or bug in IRQ handling!\n"); 429 async->events |= COMEDI_CB_ERROR; 430 } 431 } 432 } 433 434 static void usbduxsub_ao_isoc_irq(struct urb *urb) 435 { 436 struct comedi_device *dev = urb->context; 437 struct comedi_subdevice *s = dev->write_subdev; 438 struct comedi_async *async = s->async; 439 struct usbdux_private *devpriv = dev->private; 440 441 /* exit if not running a command, do not resubmit urb */ 442 if (!devpriv->ao_cmd_running) 443 return; 444 445 switch (urb->status) { 446 case 0: 447 usbduxsub_ao_handle_urb(dev, s, urb); 448 break; 449 450 case -ECONNRESET: 451 case -ENOENT: 452 case -ESHUTDOWN: 453 case -ECONNABORTED: 454 /* after an unlink command, unplug, ... etc */ 455 async->events |= COMEDI_CB_ERROR; 456 break; 457 458 default: 459 /* a real error */ 460 dev_err(dev->class_dev, 461 "Non-zero urb status received in ao intr context: %d\n", 462 urb->status); 463 async->events |= COMEDI_CB_ERROR; 464 break; 465 } 466 467 /* 468 * comedi_handle_events() cannot be used in this driver. The (*cancel) 469 * operation would unlink the urb. 470 */ 471 if (async->events & COMEDI_CB_CANCEL_MASK) 472 usbdux_ao_stop(dev, 0); 473 474 comedi_event(dev, s); 475 } 476 477 static int usbdux_submit_urbs(struct comedi_device *dev, 478 struct urb **urbs, int num_urbs, 479 int input_urb) 480 { 481 struct usb_device *usb = comedi_to_usb_dev(dev); 482 struct usbdux_private *devpriv = dev->private; 483 struct urb *urb; 484 int ret; 485 int i; 486 487 /* Submit all URBs and start the transfer on the bus */ 488 for (i = 0; i < num_urbs; i++) { 489 urb = urbs[i]; 490 491 /* in case of a resubmission after an unlink... */ 492 if (input_urb) 493 urb->interval = devpriv->ai_interval; 494 urb->context = dev; 495 urb->dev = usb; 496 urb->status = 0; 497 urb->transfer_flags = URB_ISO_ASAP; 498 499 ret = usb_submit_urb(urb, GFP_ATOMIC); 500 if (ret) 501 return ret; 502 } 503 return 0; 504 } 505 506 static int usbdux_ai_cmdtest(struct comedi_device *dev, 507 struct comedi_subdevice *s, struct comedi_cmd *cmd) 508 { 509 struct usbdux_private *devpriv = dev->private; 510 int err = 0; 511 512 /* Step 1 : check if triggers are trivially valid */ 513 514 err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_INT); 515 err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_TIMER); 516 err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_NOW); 517 err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT); 518 err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE); 519 520 if (err) 521 return 1; 522 523 /* Step 2a : make sure trigger sources are unique */ 524 525 err |= comedi_check_trigger_is_unique(cmd->start_src); 526 err |= comedi_check_trigger_is_unique(cmd->stop_src); 527 528 /* Step 2b : and mutually compatible */ 529 530 if (err) 531 return 2; 532 533 /* Step 3: check if arguments are trivially valid */ 534 535 err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0); 536 537 if (cmd->scan_begin_src == TRIG_FOLLOW) /* internal trigger */ 538 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0); 539 540 if (cmd->scan_begin_src == TRIG_TIMER) { 541 /* full speed does 1kHz scans every USB frame */ 542 unsigned int arg = 1000000; 543 unsigned int min_arg = arg; 544 545 if (devpriv->high_speed) { 546 /* 547 * In high speed mode microframes are possible. 548 * However, during one microframe we can roughly 549 * sample one channel. Thus, the more channels 550 * are in the channel list the more time we need. 551 */ 552 int i = 1; 553 554 /* find a power of 2 for the number of channels */ 555 while (i < cmd->chanlist_len) 556 i = i * 2; 557 558 arg /= 8; 559 min_arg = arg * i; 560 } 561 err |= comedi_check_trigger_arg_min(&cmd->scan_begin_arg, 562 min_arg); 563 /* calc the real sampling rate with the rounding errors */ 564 arg = (cmd->scan_begin_arg / arg) * arg; 565 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, arg); 566 } 567 568 err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg, 569 cmd->chanlist_len); 570 571 if (cmd->stop_src == TRIG_COUNT) 572 err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1); 573 else /* TRIG_NONE */ 574 err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0); 575 576 if (err) 577 return 3; 578 579 return 0; 580 } 581 582 /* 583 * creates the ADC command for the MAX1271 584 * range is the range value from comedi 585 */ 586 static u8 create_adc_command(unsigned int chan, unsigned int range) 587 { 588 u8 p = (range <= 1); 589 u8 r = ((range % 2) == 0); 590 591 return (chan << 4) | ((p == 1) << 2) | ((r == 1) << 3); 592 } 593 594 static int send_dux_commands(struct comedi_device *dev, unsigned int cmd_type) 595 { 596 struct usb_device *usb = comedi_to_usb_dev(dev); 597 struct usbdux_private *devpriv = dev->private; 598 int nsent; 599 600 devpriv->dux_commands[0] = cmd_type; 601 602 return usb_bulk_msg(usb, usb_sndbulkpipe(usb, 1), 603 devpriv->dux_commands, SIZEOFDUXBUFFER, 604 &nsent, BULK_TIMEOUT); 605 } 606 607 static int receive_dux_commands(struct comedi_device *dev, unsigned int command) 608 { 609 struct usb_device *usb = comedi_to_usb_dev(dev); 610 struct usbdux_private *devpriv = dev->private; 611 int ret; 612 int nrec; 613 int i; 614 615 for (i = 0; i < RETRIES; i++) { 616 ret = usb_bulk_msg(usb, usb_rcvbulkpipe(usb, 8), 617 devpriv->insn_buf, SIZEINSNBUF, 618 &nrec, BULK_TIMEOUT); 619 if (ret < 0) 620 return ret; 621 if (le16_to_cpu(devpriv->insn_buf[0]) == command) 622 return ret; 623 } 624 /* command not received */ 625 return -EFAULT; 626 } 627 628 static int usbdux_ai_inttrig(struct comedi_device *dev, 629 struct comedi_subdevice *s, 630 unsigned int trig_num) 631 { 632 struct usbdux_private *devpriv = dev->private; 633 struct comedi_cmd *cmd = &s->async->cmd; 634 int ret; 635 636 if (trig_num != cmd->start_arg) 637 return -EINVAL; 638 639 mutex_lock(&devpriv->mut); 640 641 if (!devpriv->ai_cmd_running) { 642 devpriv->ai_cmd_running = 1; 643 ret = usbdux_submit_urbs(dev, devpriv->ai_urbs, 644 devpriv->n_ai_urbs, 1); 645 if (ret < 0) { 646 devpriv->ai_cmd_running = 0; 647 goto ai_trig_exit; 648 } 649 s->async->inttrig = NULL; 650 } else { 651 ret = -EBUSY; 652 } 653 654 ai_trig_exit: 655 mutex_unlock(&devpriv->mut); 656 return ret; 657 } 658 659 static int usbdux_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s) 660 { 661 struct usbdux_private *devpriv = dev->private; 662 struct comedi_cmd *cmd = &s->async->cmd; 663 int len = cmd->chanlist_len; 664 int ret = -EBUSY; 665 int i; 666 667 /* block other CPUs from starting an ai_cmd */ 668 mutex_lock(&devpriv->mut); 669 670 if (devpriv->ai_cmd_running) 671 goto ai_cmd_exit; 672 673 devpriv->dux_commands[1] = len; 674 for (i = 0; i < len; ++i) { 675 unsigned int chan = CR_CHAN(cmd->chanlist[i]); 676 unsigned int range = CR_RANGE(cmd->chanlist[i]); 677 678 devpriv->dux_commands[i + 2] = create_adc_command(chan, range); 679 } 680 681 ret = send_dux_commands(dev, USBDUX_CMD_MULT_AI); 682 if (ret < 0) 683 goto ai_cmd_exit; 684 685 if (devpriv->high_speed) { 686 /* 687 * every channel gets a time window of 125us. Thus, if we 688 * sample all 8 channels we need 1ms. If we sample only one 689 * channel we need only 125us 690 */ 691 devpriv->ai_interval = 1; 692 /* find a power of 2 for the interval */ 693 while (devpriv->ai_interval < len) 694 devpriv->ai_interval *= 2; 695 696 devpriv->ai_timer = cmd->scan_begin_arg / 697 (125000 * devpriv->ai_interval); 698 } else { 699 /* interval always 1ms */ 700 devpriv->ai_interval = 1; 701 devpriv->ai_timer = cmd->scan_begin_arg / 1000000; 702 } 703 if (devpriv->ai_timer < 1) { 704 ret = -EINVAL; 705 goto ai_cmd_exit; 706 } 707 708 devpriv->ai_counter = devpriv->ai_timer; 709 710 if (cmd->start_src == TRIG_NOW) { 711 /* enable this acquisition operation */ 712 devpriv->ai_cmd_running = 1; 713 ret = usbdux_submit_urbs(dev, devpriv->ai_urbs, 714 devpriv->n_ai_urbs, 1); 715 if (ret < 0) { 716 devpriv->ai_cmd_running = 0; 717 /* fixme: unlink here?? */ 718 goto ai_cmd_exit; 719 } 720 s->async->inttrig = NULL; 721 } else { 722 /* TRIG_INT */ 723 /* don't enable the acquision operation */ 724 /* wait for an internal signal */ 725 s->async->inttrig = usbdux_ai_inttrig; 726 } 727 728 ai_cmd_exit: 729 mutex_unlock(&devpriv->mut); 730 731 return ret; 732 } 733 734 /* Mode 0 is used to get a single conversion on demand */ 735 static int usbdux_ai_insn_read(struct comedi_device *dev, 736 struct comedi_subdevice *s, 737 struct comedi_insn *insn, 738 unsigned int *data) 739 { 740 struct usbdux_private *devpriv = dev->private; 741 unsigned int chan = CR_CHAN(insn->chanspec); 742 unsigned int range = CR_RANGE(insn->chanspec); 743 unsigned int val; 744 int ret = -EBUSY; 745 int i; 746 747 mutex_lock(&devpriv->mut); 748 749 if (devpriv->ai_cmd_running) 750 goto ai_read_exit; 751 752 /* set command for the first channel */ 753 devpriv->dux_commands[1] = create_adc_command(chan, range); 754 755 /* adc commands */ 756 ret = send_dux_commands(dev, USBDUX_CMD_SINGLE_AI); 757 if (ret < 0) 758 goto ai_read_exit; 759 760 for (i = 0; i < insn->n; i++) { 761 ret = receive_dux_commands(dev, USBDUX_CMD_SINGLE_AI); 762 if (ret < 0) 763 goto ai_read_exit; 764 765 val = le16_to_cpu(devpriv->insn_buf[1]); 766 767 /* bipolar data is two's-complement */ 768 if (comedi_range_is_bipolar(s, range)) 769 val = comedi_offset_munge(s, val); 770 771 data[i] = val; 772 } 773 774 ai_read_exit: 775 mutex_unlock(&devpriv->mut); 776 777 return ret ? ret : insn->n; 778 } 779 780 static int usbdux_ao_insn_read(struct comedi_device *dev, 781 struct comedi_subdevice *s, 782 struct comedi_insn *insn, 783 unsigned int *data) 784 { 785 struct usbdux_private *devpriv = dev->private; 786 int ret; 787 788 mutex_lock(&devpriv->mut); 789 ret = comedi_readback_insn_read(dev, s, insn, data); 790 mutex_unlock(&devpriv->mut); 791 792 return ret; 793 } 794 795 static int usbdux_ao_insn_write(struct comedi_device *dev, 796 struct comedi_subdevice *s, 797 struct comedi_insn *insn, 798 unsigned int *data) 799 { 800 struct usbdux_private *devpriv = dev->private; 801 unsigned int chan = CR_CHAN(insn->chanspec); 802 __le16 *p = (__le16 *)&devpriv->dux_commands[2]; 803 int ret = -EBUSY; 804 int i; 805 806 mutex_lock(&devpriv->mut); 807 808 if (devpriv->ao_cmd_running) 809 goto ao_write_exit; 810 811 /* number of channels: 1 */ 812 devpriv->dux_commands[1] = 1; 813 /* channel number */ 814 devpriv->dux_commands[4] = chan << 6; 815 816 for (i = 0; i < insn->n; i++) { 817 unsigned int val = data[i]; 818 819 /* one 16 bit value */ 820 *p = cpu_to_le16(val); 821 822 ret = send_dux_commands(dev, USBDUX_CMD_AO); 823 if (ret < 0) 824 goto ao_write_exit; 825 826 s->readback[chan] = val; 827 } 828 829 ao_write_exit: 830 mutex_unlock(&devpriv->mut); 831 832 return ret ? ret : insn->n; 833 } 834 835 static int usbdux_ao_inttrig(struct comedi_device *dev, 836 struct comedi_subdevice *s, 837 unsigned int trig_num) 838 { 839 struct usbdux_private *devpriv = dev->private; 840 struct comedi_cmd *cmd = &s->async->cmd; 841 int ret; 842 843 if (trig_num != cmd->start_arg) 844 return -EINVAL; 845 846 mutex_lock(&devpriv->mut); 847 848 if (!devpriv->ao_cmd_running) { 849 devpriv->ao_cmd_running = 1; 850 ret = usbdux_submit_urbs(dev, devpriv->ao_urbs, 851 devpriv->n_ao_urbs, 0); 852 if (ret < 0) { 853 devpriv->ao_cmd_running = 0; 854 goto ao_trig_exit; 855 } 856 s->async->inttrig = NULL; 857 } else { 858 ret = -EBUSY; 859 } 860 861 ao_trig_exit: 862 mutex_unlock(&devpriv->mut); 863 return ret; 864 } 865 866 static int usbdux_ao_cmdtest(struct comedi_device *dev, 867 struct comedi_subdevice *s, struct comedi_cmd *cmd) 868 { 869 int err = 0; 870 unsigned int flags; 871 872 /* Step 1 : check if triggers are trivially valid */ 873 874 err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_INT); 875 876 if (0) { /* (devpriv->high_speed) */ 877 /* the sampling rate is set by the coversion rate */ 878 flags = TRIG_FOLLOW; 879 } else { 880 /* start a new scan (output at once) with a timer */ 881 flags = TRIG_TIMER; 882 } 883 err |= comedi_check_trigger_src(&cmd->scan_begin_src, flags); 884 885 if (0) { /* (devpriv->high_speed) */ 886 /* 887 * in usb-2.0 only one conversion it transmitted 888 * but with 8kHz/n 889 */ 890 flags = TRIG_TIMER; 891 } else { 892 /* 893 * all conversion events happen simultaneously with 894 * a rate of 1kHz/n 895 */ 896 flags = TRIG_NOW; 897 } 898 err |= comedi_check_trigger_src(&cmd->convert_src, flags); 899 900 err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT); 901 err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE); 902 903 if (err) 904 return 1; 905 906 /* Step 2a : make sure trigger sources are unique */ 907 908 err |= comedi_check_trigger_is_unique(cmd->start_src); 909 err |= comedi_check_trigger_is_unique(cmd->stop_src); 910 911 /* Step 2b : and mutually compatible */ 912 913 if (err) 914 return 2; 915 916 /* Step 3: check if arguments are trivially valid */ 917 918 err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0); 919 920 if (cmd->scan_begin_src == TRIG_FOLLOW) /* internal trigger */ 921 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0); 922 923 if (cmd->scan_begin_src == TRIG_TIMER) { 924 err |= comedi_check_trigger_arg_min(&cmd->scan_begin_arg, 925 1000000); 926 } 927 928 /* not used now, is for later use */ 929 if (cmd->convert_src == TRIG_TIMER) 930 err |= comedi_check_trigger_arg_min(&cmd->convert_arg, 125000); 931 932 err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg, 933 cmd->chanlist_len); 934 935 if (cmd->stop_src == TRIG_COUNT) 936 err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1); 937 else /* TRIG_NONE */ 938 err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0); 939 940 if (err) 941 return 3; 942 943 return 0; 944 } 945 946 static int usbdux_ao_cmd(struct comedi_device *dev, struct comedi_subdevice *s) 947 { 948 struct usbdux_private *devpriv = dev->private; 949 struct comedi_cmd *cmd = &s->async->cmd; 950 int ret = -EBUSY; 951 952 mutex_lock(&devpriv->mut); 953 954 if (devpriv->ao_cmd_running) 955 goto ao_cmd_exit; 956 957 /* we count in steps of 1ms (125us) */ 958 /* 125us mode not used yet */ 959 if (0) { /* (devpriv->high_speed) */ 960 /* 125us */ 961 /* timing of the conversion itself: every 125 us */ 962 devpriv->ao_timer = cmd->convert_arg / 125000; 963 } else { 964 /* 1ms */ 965 /* timing of the scan: we get all channels at once */ 966 devpriv->ao_timer = cmd->scan_begin_arg / 1000000; 967 if (devpriv->ao_timer < 1) { 968 ret = -EINVAL; 969 goto ao_cmd_exit; 970 } 971 } 972 973 devpriv->ao_counter = devpriv->ao_timer; 974 975 if (cmd->start_src == TRIG_NOW) { 976 /* enable this acquisition operation */ 977 devpriv->ao_cmd_running = 1; 978 ret = usbdux_submit_urbs(dev, devpriv->ao_urbs, 979 devpriv->n_ao_urbs, 0); 980 if (ret < 0) { 981 devpriv->ao_cmd_running = 0; 982 /* fixme: unlink here?? */ 983 goto ao_cmd_exit; 984 } 985 s->async->inttrig = NULL; 986 } else { 987 /* TRIG_INT */ 988 /* submit the urbs later */ 989 /* wait for an internal signal */ 990 s->async->inttrig = usbdux_ao_inttrig; 991 } 992 993 ao_cmd_exit: 994 mutex_unlock(&devpriv->mut); 995 996 return ret; 997 } 998 999 static int usbdux_dio_insn_config(struct comedi_device *dev, 1000 struct comedi_subdevice *s, 1001 struct comedi_insn *insn, 1002 unsigned int *data) 1003 { 1004 int ret; 1005 1006 ret = comedi_dio_insn_config(dev, s, insn, data, 0); 1007 if (ret) 1008 return ret; 1009 1010 /* 1011 * We don't tell the firmware here as it would take 8 frames 1012 * to submit the information. We do it in the insn_bits. 1013 */ 1014 return insn->n; 1015 } 1016 1017 static int usbdux_dio_insn_bits(struct comedi_device *dev, 1018 struct comedi_subdevice *s, 1019 struct comedi_insn *insn, 1020 unsigned int *data) 1021 { 1022 struct usbdux_private *devpriv = dev->private; 1023 int ret; 1024 1025 mutex_lock(&devpriv->mut); 1026 1027 comedi_dio_update_state(s, data); 1028 1029 /* Always update the hardware. See the (*insn_config). */ 1030 devpriv->dux_commands[1] = s->io_bits; 1031 devpriv->dux_commands[2] = s->state; 1032 1033 /* 1034 * This command also tells the firmware to return 1035 * the digital input lines. 1036 */ 1037 ret = send_dux_commands(dev, USBDUX_CMD_DIO_BITS); 1038 if (ret < 0) 1039 goto dio_exit; 1040 ret = receive_dux_commands(dev, USBDUX_CMD_DIO_BITS); 1041 if (ret < 0) 1042 goto dio_exit; 1043 1044 data[1] = le16_to_cpu(devpriv->insn_buf[1]); 1045 1046 dio_exit: 1047 mutex_unlock(&devpriv->mut); 1048 1049 return ret ? ret : insn->n; 1050 } 1051 1052 static int usbdux_counter_read(struct comedi_device *dev, 1053 struct comedi_subdevice *s, 1054 struct comedi_insn *insn, 1055 unsigned int *data) 1056 { 1057 struct usbdux_private *devpriv = dev->private; 1058 unsigned int chan = CR_CHAN(insn->chanspec); 1059 int ret = 0; 1060 int i; 1061 1062 mutex_lock(&devpriv->mut); 1063 1064 for (i = 0; i < insn->n; i++) { 1065 ret = send_dux_commands(dev, USBDUX_CMD_TIMER_RD); 1066 if (ret < 0) 1067 goto counter_read_exit; 1068 ret = receive_dux_commands(dev, USBDUX_CMD_TIMER_RD); 1069 if (ret < 0) 1070 goto counter_read_exit; 1071 1072 data[i] = le16_to_cpu(devpriv->insn_buf[chan + 1]); 1073 } 1074 1075 counter_read_exit: 1076 mutex_unlock(&devpriv->mut); 1077 1078 return ret ? ret : insn->n; 1079 } 1080 1081 static int usbdux_counter_write(struct comedi_device *dev, 1082 struct comedi_subdevice *s, 1083 struct comedi_insn *insn, 1084 unsigned int *data) 1085 { 1086 struct usbdux_private *devpriv = dev->private; 1087 unsigned int chan = CR_CHAN(insn->chanspec); 1088 __le16 *p = (__le16 *)&devpriv->dux_commands[2]; 1089 int ret = 0; 1090 int i; 1091 1092 mutex_lock(&devpriv->mut); 1093 1094 devpriv->dux_commands[1] = chan; 1095 1096 for (i = 0; i < insn->n; i++) { 1097 *p = cpu_to_le16(data[i]); 1098 1099 ret = send_dux_commands(dev, USBDUX_CMD_TIMER_WR); 1100 if (ret < 0) 1101 break; 1102 } 1103 1104 mutex_unlock(&devpriv->mut); 1105 1106 return ret ? ret : insn->n; 1107 } 1108 1109 static int usbdux_counter_config(struct comedi_device *dev, 1110 struct comedi_subdevice *s, 1111 struct comedi_insn *insn, unsigned int *data) 1112 { 1113 /* nothing to do so far */ 1114 return 2; 1115 } 1116 1117 static void usbduxsub_unlink_pwm_urbs(struct comedi_device *dev) 1118 { 1119 struct usbdux_private *devpriv = dev->private; 1120 1121 usb_kill_urb(devpriv->pwm_urb); 1122 } 1123 1124 static void usbdux_pwm_stop(struct comedi_device *dev, int do_unlink) 1125 { 1126 struct usbdux_private *devpriv = dev->private; 1127 1128 if (do_unlink) 1129 usbduxsub_unlink_pwm_urbs(dev); 1130 1131 devpriv->pwm_cmd_running = 0; 1132 } 1133 1134 static int usbdux_pwm_cancel(struct comedi_device *dev, 1135 struct comedi_subdevice *s) 1136 { 1137 struct usbdux_private *devpriv = dev->private; 1138 int ret; 1139 1140 mutex_lock(&devpriv->mut); 1141 /* unlink only if it is really running */ 1142 usbdux_pwm_stop(dev, devpriv->pwm_cmd_running); 1143 ret = send_dux_commands(dev, USBDUX_CMD_PWM_OFF); 1144 mutex_unlock(&devpriv->mut); 1145 1146 return ret; 1147 } 1148 1149 static void usbduxsub_pwm_irq(struct urb *urb) 1150 { 1151 struct comedi_device *dev = urb->context; 1152 struct usbdux_private *devpriv = dev->private; 1153 int ret; 1154 1155 switch (urb->status) { 1156 case 0: 1157 /* success */ 1158 break; 1159 1160 case -ECONNRESET: 1161 case -ENOENT: 1162 case -ESHUTDOWN: 1163 case -ECONNABORTED: 1164 /* 1165 * after an unlink command, unplug, ... etc 1166 * no unlink needed here. Already shutting down. 1167 */ 1168 if (devpriv->pwm_cmd_running) 1169 usbdux_pwm_stop(dev, 0); 1170 1171 return; 1172 1173 default: 1174 /* a real error */ 1175 if (devpriv->pwm_cmd_running) { 1176 dev_err(dev->class_dev, 1177 "Non-zero urb status received in pwm intr context: %d\n", 1178 urb->status); 1179 usbdux_pwm_stop(dev, 0); 1180 } 1181 return; 1182 } 1183 1184 /* are we actually running? */ 1185 if (!devpriv->pwm_cmd_running) 1186 return; 1187 1188 urb->transfer_buffer_length = devpriv->pwm_buf_sz; 1189 urb->dev = comedi_to_usb_dev(dev); 1190 urb->status = 0; 1191 if (devpriv->pwm_cmd_running) { 1192 ret = usb_submit_urb(urb, GFP_ATOMIC); 1193 if (ret < 0) { 1194 dev_err(dev->class_dev, 1195 "pwm urb resubm failed in int-cont. ret=%d", 1196 ret); 1197 if (ret == -EL2NSYNC) 1198 dev_err(dev->class_dev, 1199 "buggy USB host controller or bug in IRQ handling!\n"); 1200 1201 /* don't do an unlink here */ 1202 usbdux_pwm_stop(dev, 0); 1203 } 1204 } 1205 } 1206 1207 static int usbduxsub_submit_pwm_urbs(struct comedi_device *dev) 1208 { 1209 struct usb_device *usb = comedi_to_usb_dev(dev); 1210 struct usbdux_private *devpriv = dev->private; 1211 struct urb *urb = devpriv->pwm_urb; 1212 1213 /* in case of a resubmission after an unlink... */ 1214 usb_fill_bulk_urb(urb, usb, usb_sndbulkpipe(usb, 4), 1215 urb->transfer_buffer, 1216 devpriv->pwm_buf_sz, 1217 usbduxsub_pwm_irq, 1218 dev); 1219 1220 return usb_submit_urb(urb, GFP_ATOMIC); 1221 } 1222 1223 static int usbdux_pwm_period(struct comedi_device *dev, 1224 struct comedi_subdevice *s, 1225 unsigned int period) 1226 { 1227 struct usbdux_private *devpriv = dev->private; 1228 int fx2delay; 1229 1230 if (period < MIN_PWM_PERIOD) 1231 return -EAGAIN; 1232 1233 fx2delay = (period / (6 * 512 * 1000 / 33)) - 6; 1234 if (fx2delay > 255) 1235 return -EAGAIN; 1236 1237 devpriv->pwm_delay = fx2delay; 1238 devpriv->pwm_period = period; 1239 1240 return 0; 1241 } 1242 1243 static int usbdux_pwm_start(struct comedi_device *dev, 1244 struct comedi_subdevice *s) 1245 { 1246 struct usbdux_private *devpriv = dev->private; 1247 int ret = 0; 1248 1249 mutex_lock(&devpriv->mut); 1250 1251 if (devpriv->pwm_cmd_running) 1252 goto pwm_start_exit; 1253 1254 devpriv->dux_commands[1] = devpriv->pwm_delay; 1255 ret = send_dux_commands(dev, USBDUX_CMD_PWM_ON); 1256 if (ret < 0) 1257 goto pwm_start_exit; 1258 1259 /* initialise the buffer */ 1260 memset(devpriv->pwm_urb->transfer_buffer, 0, devpriv->pwm_buf_sz); 1261 1262 devpriv->pwm_cmd_running = 1; 1263 ret = usbduxsub_submit_pwm_urbs(dev); 1264 if (ret < 0) 1265 devpriv->pwm_cmd_running = 0; 1266 1267 pwm_start_exit: 1268 mutex_unlock(&devpriv->mut); 1269 1270 return ret; 1271 } 1272 1273 static void usbdux_pwm_pattern(struct comedi_device *dev, 1274 struct comedi_subdevice *s, 1275 unsigned int chan, 1276 unsigned int value, 1277 unsigned int sign) 1278 { 1279 struct usbdux_private *devpriv = dev->private; 1280 char pwm_mask = (1 << chan); /* DIO bit for the PWM data */ 1281 char sgn_mask = (16 << chan); /* DIO bit for the sign */ 1282 char *buf = (char *)(devpriv->pwm_urb->transfer_buffer); 1283 int szbuf = devpriv->pwm_buf_sz; 1284 int i; 1285 1286 for (i = 0; i < szbuf; i++) { 1287 char c = *buf; 1288 1289 c &= ~pwm_mask; 1290 if (i < value) 1291 c |= pwm_mask; 1292 if (!sign) 1293 c &= ~sgn_mask; 1294 else 1295 c |= sgn_mask; 1296 *buf++ = c; 1297 } 1298 } 1299 1300 static int usbdux_pwm_write(struct comedi_device *dev, 1301 struct comedi_subdevice *s, 1302 struct comedi_insn *insn, 1303 unsigned int *data) 1304 { 1305 unsigned int chan = CR_CHAN(insn->chanspec); 1306 1307 /* 1308 * It doesn't make sense to support more than one value here 1309 * because it would just overwrite the PWM buffer. 1310 */ 1311 if (insn->n != 1) 1312 return -EINVAL; 1313 1314 /* 1315 * The sign is set via a special INSN only, this gives us 8 bits 1316 * for normal operation, sign is 0 by default. 1317 */ 1318 usbdux_pwm_pattern(dev, s, chan, data[0], 0); 1319 1320 return insn->n; 1321 } 1322 1323 static int usbdux_pwm_config(struct comedi_device *dev, 1324 struct comedi_subdevice *s, 1325 struct comedi_insn *insn, 1326 unsigned int *data) 1327 { 1328 struct usbdux_private *devpriv = dev->private; 1329 unsigned int chan = CR_CHAN(insn->chanspec); 1330 1331 switch (data[0]) { 1332 case INSN_CONFIG_ARM: 1333 /* 1334 * if not zero the PWM is limited to a certain time which is 1335 * not supported here 1336 */ 1337 if (data[1] != 0) 1338 return -EINVAL; 1339 return usbdux_pwm_start(dev, s); 1340 case INSN_CONFIG_DISARM: 1341 return usbdux_pwm_cancel(dev, s); 1342 case INSN_CONFIG_GET_PWM_STATUS: 1343 data[1] = devpriv->pwm_cmd_running; 1344 return 0; 1345 case INSN_CONFIG_PWM_SET_PERIOD: 1346 return usbdux_pwm_period(dev, s, data[1]); 1347 case INSN_CONFIG_PWM_GET_PERIOD: 1348 data[1] = devpriv->pwm_period; 1349 return 0; 1350 case INSN_CONFIG_PWM_SET_H_BRIDGE: 1351 /* 1352 * data[1] = value 1353 * data[2] = sign (for a relay) 1354 */ 1355 usbdux_pwm_pattern(dev, s, chan, data[1], (data[2] != 0)); 1356 return 0; 1357 case INSN_CONFIG_PWM_GET_H_BRIDGE: 1358 /* values are not kept in this driver, nothing to return here */ 1359 return -EINVAL; 1360 } 1361 return -EINVAL; 1362 } 1363 1364 static int usbdux_firmware_upload(struct comedi_device *dev, 1365 const u8 *data, size_t size, 1366 unsigned long context) 1367 { 1368 struct usb_device *usb = comedi_to_usb_dev(dev); 1369 u8 *buf; 1370 u8 *tmp; 1371 int ret; 1372 1373 if (!data) 1374 return 0; 1375 1376 if (size > USBDUX_FIRMWARE_MAX_LEN) { 1377 dev_err(dev->class_dev, 1378 "usbdux firmware binary it too large for FX2.\n"); 1379 return -ENOMEM; 1380 } 1381 1382 /* we generate a local buffer for the firmware */ 1383 buf = kmemdup(data, size, GFP_KERNEL); 1384 if (!buf) 1385 return -ENOMEM; 1386 1387 /* we need a malloc'ed buffer for usb_control_msg() */ 1388 tmp = kmalloc(1, GFP_KERNEL); 1389 if (!tmp) { 1390 kfree(buf); 1391 return -ENOMEM; 1392 } 1393 1394 /* stop the current firmware on the device */ 1395 *tmp = 1; /* 7f92 to one */ 1396 ret = usb_control_msg(usb, usb_sndctrlpipe(usb, 0), 1397 USBDUX_FIRMWARE_CMD, 1398 VENDOR_DIR_OUT, 1399 USBDUX_CPU_CS, 0x0000, 1400 tmp, 1, 1401 BULK_TIMEOUT); 1402 if (ret < 0) { 1403 dev_err(dev->class_dev, "can not stop firmware\n"); 1404 goto done; 1405 } 1406 1407 /* upload the new firmware to the device */ 1408 ret = usb_control_msg(usb, usb_sndctrlpipe(usb, 0), 1409 USBDUX_FIRMWARE_CMD, 1410 VENDOR_DIR_OUT, 1411 0, 0x0000, 1412 buf, size, 1413 BULK_TIMEOUT); 1414 if (ret < 0) { 1415 dev_err(dev->class_dev, "firmware upload failed\n"); 1416 goto done; 1417 } 1418 1419 /* start the new firmware on the device */ 1420 *tmp = 0; /* 7f92 to zero */ 1421 ret = usb_control_msg(usb, usb_sndctrlpipe(usb, 0), 1422 USBDUX_FIRMWARE_CMD, 1423 VENDOR_DIR_OUT, 1424 USBDUX_CPU_CS, 0x0000, 1425 tmp, 1, 1426 BULK_TIMEOUT); 1427 if (ret < 0) 1428 dev_err(dev->class_dev, "can not start firmware\n"); 1429 1430 done: 1431 kfree(tmp); 1432 kfree(buf); 1433 return ret; 1434 } 1435 1436 static int usbdux_alloc_usb_buffers(struct comedi_device *dev) 1437 { 1438 struct usb_device *usb = comedi_to_usb_dev(dev); 1439 struct usbdux_private *devpriv = dev->private; 1440 struct urb *urb; 1441 int i; 1442 1443 devpriv->dux_commands = kzalloc(SIZEOFDUXBUFFER, GFP_KERNEL); 1444 devpriv->in_buf = kzalloc(SIZEINBUF, GFP_KERNEL); 1445 devpriv->insn_buf = kzalloc(SIZEINSNBUF, GFP_KERNEL); 1446 devpriv->ai_urbs = kcalloc(devpriv->n_ai_urbs, sizeof(void *), 1447 GFP_KERNEL); 1448 devpriv->ao_urbs = kcalloc(devpriv->n_ao_urbs, sizeof(void *), 1449 GFP_KERNEL); 1450 if (!devpriv->dux_commands || !devpriv->in_buf || !devpriv->insn_buf || 1451 !devpriv->ai_urbs || !devpriv->ao_urbs) 1452 return -ENOMEM; 1453 1454 for (i = 0; i < devpriv->n_ai_urbs; i++) { 1455 /* one frame: 1ms */ 1456 urb = usb_alloc_urb(1, GFP_KERNEL); 1457 if (!urb) 1458 return -ENOMEM; 1459 devpriv->ai_urbs[i] = urb; 1460 1461 urb->dev = usb; 1462 urb->context = dev; 1463 urb->pipe = usb_rcvisocpipe(usb, 6); 1464 urb->transfer_flags = URB_ISO_ASAP; 1465 urb->transfer_buffer = kzalloc(SIZEINBUF, GFP_KERNEL); 1466 if (!urb->transfer_buffer) 1467 return -ENOMEM; 1468 1469 urb->complete = usbduxsub_ai_isoc_irq; 1470 urb->number_of_packets = 1; 1471 urb->transfer_buffer_length = SIZEINBUF; 1472 urb->iso_frame_desc[0].offset = 0; 1473 urb->iso_frame_desc[0].length = SIZEINBUF; 1474 } 1475 1476 for (i = 0; i < devpriv->n_ao_urbs; i++) { 1477 /* one frame: 1ms */ 1478 urb = usb_alloc_urb(1, GFP_KERNEL); 1479 if (!urb) 1480 return -ENOMEM; 1481 devpriv->ao_urbs[i] = urb; 1482 1483 urb->dev = usb; 1484 urb->context = dev; 1485 urb->pipe = usb_sndisocpipe(usb, 2); 1486 urb->transfer_flags = URB_ISO_ASAP; 1487 urb->transfer_buffer = kzalloc(SIZEOUTBUF, GFP_KERNEL); 1488 if (!urb->transfer_buffer) 1489 return -ENOMEM; 1490 1491 urb->complete = usbduxsub_ao_isoc_irq; 1492 urb->number_of_packets = 1; 1493 urb->transfer_buffer_length = SIZEOUTBUF; 1494 urb->iso_frame_desc[0].offset = 0; 1495 urb->iso_frame_desc[0].length = SIZEOUTBUF; 1496 if (devpriv->high_speed) 1497 urb->interval = 8; /* uframes */ 1498 else 1499 urb->interval = 1; /* frames */ 1500 } 1501 1502 /* pwm */ 1503 if (devpriv->pwm_buf_sz) { 1504 urb = usb_alloc_urb(0, GFP_KERNEL); 1505 if (!urb) 1506 return -ENOMEM; 1507 devpriv->pwm_urb = urb; 1508 1509 /* max bulk ep size in high speed */ 1510 urb->transfer_buffer = kzalloc(devpriv->pwm_buf_sz, 1511 GFP_KERNEL); 1512 if (!urb->transfer_buffer) 1513 return -ENOMEM; 1514 } 1515 1516 return 0; 1517 } 1518 1519 static void usbdux_free_usb_buffers(struct comedi_device *dev) 1520 { 1521 struct usbdux_private *devpriv = dev->private; 1522 struct urb *urb; 1523 int i; 1524 1525 urb = devpriv->pwm_urb; 1526 if (urb) { 1527 kfree(urb->transfer_buffer); 1528 usb_free_urb(urb); 1529 } 1530 if (devpriv->ao_urbs) { 1531 for (i = 0; i < devpriv->n_ao_urbs; i++) { 1532 urb = devpriv->ao_urbs[i]; 1533 if (urb) { 1534 kfree(urb->transfer_buffer); 1535 usb_free_urb(urb); 1536 } 1537 } 1538 kfree(devpriv->ao_urbs); 1539 } 1540 if (devpriv->ai_urbs) { 1541 for (i = 0; i < devpriv->n_ai_urbs; i++) { 1542 urb = devpriv->ai_urbs[i]; 1543 if (urb) { 1544 kfree(urb->transfer_buffer); 1545 usb_free_urb(urb); 1546 } 1547 } 1548 kfree(devpriv->ai_urbs); 1549 } 1550 kfree(devpriv->insn_buf); 1551 kfree(devpriv->in_buf); 1552 kfree(devpriv->dux_commands); 1553 } 1554 1555 static int usbdux_auto_attach(struct comedi_device *dev, 1556 unsigned long context_unused) 1557 { 1558 struct usb_interface *intf = comedi_to_usb_interface(dev); 1559 struct usb_device *usb = comedi_to_usb_dev(dev); 1560 struct usbdux_private *devpriv; 1561 struct comedi_subdevice *s; 1562 int ret; 1563 1564 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv)); 1565 if (!devpriv) 1566 return -ENOMEM; 1567 1568 mutex_init(&devpriv->mut); 1569 1570 usb_set_intfdata(intf, devpriv); 1571 1572 devpriv->high_speed = (usb->speed == USB_SPEED_HIGH); 1573 if (devpriv->high_speed) { 1574 devpriv->n_ai_urbs = NUMOFINBUFFERSHIGH; 1575 devpriv->n_ao_urbs = NUMOFOUTBUFFERSHIGH; 1576 devpriv->pwm_buf_sz = 512; 1577 } else { 1578 devpriv->n_ai_urbs = NUMOFINBUFFERSFULL; 1579 devpriv->n_ao_urbs = NUMOFOUTBUFFERSFULL; 1580 } 1581 1582 ret = usbdux_alloc_usb_buffers(dev); 1583 if (ret) 1584 return ret; 1585 1586 /* setting to alternate setting 3: enabling iso ep and bulk ep. */ 1587 ret = usb_set_interface(usb, intf->altsetting->desc.bInterfaceNumber, 1588 3); 1589 if (ret < 0) { 1590 dev_err(dev->class_dev, 1591 "could not set alternate setting 3 in high speed\n"); 1592 return ret; 1593 } 1594 1595 ret = comedi_load_firmware(dev, &usb->dev, USBDUX_FIRMWARE, 1596 usbdux_firmware_upload, 0); 1597 if (ret < 0) 1598 return ret; 1599 1600 ret = comedi_alloc_subdevices(dev, (devpriv->high_speed) ? 5 : 4); 1601 if (ret) 1602 return ret; 1603 1604 /* Analog Input subdevice */ 1605 s = &dev->subdevices[0]; 1606 dev->read_subdev = s; 1607 s->type = COMEDI_SUBD_AI; 1608 s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_CMD_READ; 1609 s->n_chan = 8; 1610 s->maxdata = 0x0fff; 1611 s->len_chanlist = 8; 1612 s->range_table = &range_usbdux_ai_range; 1613 s->insn_read = usbdux_ai_insn_read; 1614 s->do_cmdtest = usbdux_ai_cmdtest; 1615 s->do_cmd = usbdux_ai_cmd; 1616 s->cancel = usbdux_ai_cancel; 1617 1618 /* Analog Output subdevice */ 1619 s = &dev->subdevices[1]; 1620 dev->write_subdev = s; 1621 s->type = COMEDI_SUBD_AO; 1622 s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_CMD_WRITE; 1623 s->n_chan = 4; 1624 s->maxdata = 0x0fff; 1625 s->len_chanlist = s->n_chan; 1626 s->range_table = &range_usbdux_ao_range; 1627 s->do_cmdtest = usbdux_ao_cmdtest; 1628 s->do_cmd = usbdux_ao_cmd; 1629 s->cancel = usbdux_ao_cancel; 1630 s->insn_read = usbdux_ao_insn_read; 1631 s->insn_write = usbdux_ao_insn_write; 1632 1633 ret = comedi_alloc_subdev_readback(s); 1634 if (ret) 1635 return ret; 1636 1637 /* Digital I/O subdevice */ 1638 s = &dev->subdevices[2]; 1639 s->type = COMEDI_SUBD_DIO; 1640 s->subdev_flags = SDF_READABLE | SDF_WRITABLE; 1641 s->n_chan = 8; 1642 s->maxdata = 1; 1643 s->range_table = &range_digital; 1644 s->insn_bits = usbdux_dio_insn_bits; 1645 s->insn_config = usbdux_dio_insn_config; 1646 1647 /* Counter subdevice */ 1648 s = &dev->subdevices[3]; 1649 s->type = COMEDI_SUBD_COUNTER; 1650 s->subdev_flags = SDF_WRITABLE | SDF_READABLE; 1651 s->n_chan = 4; 1652 s->maxdata = 0xffff; 1653 s->insn_read = usbdux_counter_read; 1654 s->insn_write = usbdux_counter_write; 1655 s->insn_config = usbdux_counter_config; 1656 1657 if (devpriv->high_speed) { 1658 /* PWM subdevice */ 1659 s = &dev->subdevices[4]; 1660 s->type = COMEDI_SUBD_PWM; 1661 s->subdev_flags = SDF_WRITABLE | SDF_PWM_HBRIDGE; 1662 s->n_chan = 8; 1663 s->maxdata = devpriv->pwm_buf_sz; 1664 s->insn_write = usbdux_pwm_write; 1665 s->insn_config = usbdux_pwm_config; 1666 1667 usbdux_pwm_period(dev, s, PWM_DEFAULT_PERIOD); 1668 } 1669 1670 return 0; 1671 } 1672 1673 static void usbdux_detach(struct comedi_device *dev) 1674 { 1675 struct usb_interface *intf = comedi_to_usb_interface(dev); 1676 struct usbdux_private *devpriv = dev->private; 1677 1678 usb_set_intfdata(intf, NULL); 1679 1680 if (!devpriv) 1681 return; 1682 1683 mutex_lock(&devpriv->mut); 1684 1685 /* force unlink all urbs */ 1686 usbdux_pwm_stop(dev, 1); 1687 usbdux_ao_stop(dev, 1); 1688 usbdux_ai_stop(dev, 1); 1689 1690 usbdux_free_usb_buffers(dev); 1691 1692 mutex_unlock(&devpriv->mut); 1693 1694 mutex_destroy(&devpriv->mut); 1695 } 1696 1697 static struct comedi_driver usbdux_driver = { 1698 .driver_name = "usbdux", 1699 .module = THIS_MODULE, 1700 .auto_attach = usbdux_auto_attach, 1701 .detach = usbdux_detach, 1702 }; 1703 1704 static int usbdux_usb_probe(struct usb_interface *intf, 1705 const struct usb_device_id *id) 1706 { 1707 return comedi_usb_auto_config(intf, &usbdux_driver, 0); 1708 } 1709 1710 static const struct usb_device_id usbdux_usb_table[] = { 1711 { USB_DEVICE(0x13d8, 0x0001) }, 1712 { USB_DEVICE(0x13d8, 0x0002) }, 1713 { } 1714 }; 1715 MODULE_DEVICE_TABLE(usb, usbdux_usb_table); 1716 1717 static struct usb_driver usbdux_usb_driver = { 1718 .name = "usbdux", 1719 .probe = usbdux_usb_probe, 1720 .disconnect = comedi_usb_auto_unconfig, 1721 .id_table = usbdux_usb_table, 1722 }; 1723 module_comedi_usb_driver(usbdux_driver, usbdux_usb_driver); 1724 1725 MODULE_AUTHOR("Bernd Porr, BerndPorr@f2s.com"); 1726 MODULE_DESCRIPTION("Stirling/ITL USB-DUX -- Bernd.Porr@f2s.com"); 1727 MODULE_LICENSE("GPL"); 1728 MODULE_FIRMWARE(USBDUX_FIRMWARE); 1729