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18#include <linux/module.h>
19#include <linux/usb.h>
20#include <linux/slab.h>
21#include <linux/sched.h>
22#include <linux/mutex.h>
23#include <linux/poll.h>
24#include <linux/usb/iowarrior.h>
25
26#define DRIVER_AUTHOR "Christian Lucht <lucht@codemercs.com>"
27#define DRIVER_DESC "USB IO-Warrior driver"
28
29#define USB_VENDOR_ID_CODEMERCS 1984
30
31#define USB_DEVICE_ID_CODEMERCS_IOW40 0x1500
32#define USB_DEVICE_ID_CODEMERCS_IOW24 0x1501
33#define USB_DEVICE_ID_CODEMERCS_IOWPV1 0x1511
34#define USB_DEVICE_ID_CODEMERCS_IOWPV2 0x1512
35
36#define USB_DEVICE_ID_CODEMERCS_IOW56 0x1503
37
38#define USB_DEVICE_ID_CODEMERCS_IOW28 0x1504
39#define USB_DEVICE_ID_CODEMERCS_IOW28L 0x1505
40#define USB_DEVICE_ID_CODEMERCS_IOW100 0x1506
41
42
43#define USB_DEVICE_ID_CODEMERCS_IOW24SAG 0x158a
44#define USB_DEVICE_ID_CODEMERCS_IOW56AM 0x158b
45
46
47#ifdef CONFIG_USB_DYNAMIC_MINORS
48#define IOWARRIOR_MINOR_BASE 0
49#else
50#define IOWARRIOR_MINOR_BASE 208
51#endif
52
53
54#define MAX_INTERRUPT_BUFFER 16
55
56
57
58
59
60#define MAX_WRITES_IN_FLIGHT 4
61
62MODULE_AUTHOR(DRIVER_AUTHOR);
63MODULE_DESCRIPTION(DRIVER_DESC);
64MODULE_LICENSE("GPL");
65
66static struct usb_driver iowarrior_driver;
67
68
69
70
71
72
73struct iowarrior {
74 struct mutex mutex;
75 struct usb_device *udev;
76 struct usb_interface *interface;
77 unsigned char minor;
78 struct usb_endpoint_descriptor *int_out_endpoint;
79 struct usb_endpoint_descriptor *int_in_endpoint;
80 struct urb *int_in_urb;
81 unsigned char *int_in_buffer;
82 unsigned char serial_number;
83 unsigned char *read_queue;
84 wait_queue_head_t read_wait;
85 wait_queue_head_t write_wait;
86 atomic_t write_busy;
87 atomic_t read_idx;
88 atomic_t intr_idx;
89 atomic_t overflow_flag;
90 int present;
91 int opened;
92 char chip_serial[9];
93 int report_size;
94 u16 product_id;
95 struct usb_anchor submitted;
96};
97
98
99
100
101
102
103
104
105#define GET_TIMEOUT 5
106#define USB_REQ_GET_REPORT 0x01
107
108static int usb_get_report(struct usb_device *dev,
109 struct usb_host_interface *inter, unsigned char type,
110 unsigned char id, void *buf, int size)
111{
112 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
113 USB_REQ_GET_REPORT,
114 USB_DIR_IN | USB_TYPE_CLASS |
115 USB_RECIP_INTERFACE, (type << 8) + id,
116 inter->desc.bInterfaceNumber, buf, size,
117 GET_TIMEOUT*HZ);
118}
119
120
121#define USB_REQ_SET_REPORT 0x09
122
123static int usb_set_report(struct usb_interface *intf, unsigned char type,
124 unsigned char id, void *buf, int size)
125{
126 return usb_control_msg(interface_to_usbdev(intf),
127 usb_sndctrlpipe(interface_to_usbdev(intf), 0),
128 USB_REQ_SET_REPORT,
129 USB_TYPE_CLASS | USB_RECIP_INTERFACE,
130 (type << 8) + id,
131 intf->cur_altsetting->desc.bInterfaceNumber, buf,
132 size, HZ);
133}
134
135
136
137
138
139static const struct usb_device_id iowarrior_ids[] = {
140 {USB_DEVICE(USB_VENDOR_ID_CODEMERCS, USB_DEVICE_ID_CODEMERCS_IOW40)},
141 {USB_DEVICE(USB_VENDOR_ID_CODEMERCS, USB_DEVICE_ID_CODEMERCS_IOW24)},
142 {USB_DEVICE(USB_VENDOR_ID_CODEMERCS, USB_DEVICE_ID_CODEMERCS_IOWPV1)},
143 {USB_DEVICE(USB_VENDOR_ID_CODEMERCS, USB_DEVICE_ID_CODEMERCS_IOWPV2)},
144 {USB_DEVICE(USB_VENDOR_ID_CODEMERCS, USB_DEVICE_ID_CODEMERCS_IOW56)},
145 {USB_DEVICE(USB_VENDOR_ID_CODEMERCS, USB_DEVICE_ID_CODEMERCS_IOW24SAG)},
146 {USB_DEVICE(USB_VENDOR_ID_CODEMERCS, USB_DEVICE_ID_CODEMERCS_IOW56AM)},
147 {USB_DEVICE(USB_VENDOR_ID_CODEMERCS, USB_DEVICE_ID_CODEMERCS_IOW28)},
148 {USB_DEVICE(USB_VENDOR_ID_CODEMERCS, USB_DEVICE_ID_CODEMERCS_IOW28L)},
149 {USB_DEVICE(USB_VENDOR_ID_CODEMERCS, USB_DEVICE_ID_CODEMERCS_IOW100)},
150 {}
151};
152MODULE_DEVICE_TABLE(usb, iowarrior_ids);
153
154
155
156
157static void iowarrior_callback(struct urb *urb)
158{
159 struct iowarrior *dev = urb->context;
160 int intr_idx;
161 int read_idx;
162 int aux_idx;
163 int offset;
164 int status = urb->status;
165 int retval;
166
167 switch (status) {
168 case 0:
169
170 break;
171 case -ECONNRESET:
172 case -ENOENT:
173 case -ESHUTDOWN:
174 return;
175 default:
176 goto exit;
177 }
178
179 intr_idx = atomic_read(&dev->intr_idx);
180
181 aux_idx = (intr_idx == 0) ? (MAX_INTERRUPT_BUFFER - 1) : (intr_idx - 1);
182 read_idx = atomic_read(&dev->read_idx);
183
184
185 if ((intr_idx != read_idx)
186 && (dev->interface->cur_altsetting->desc.bInterfaceNumber == 0)) {
187
188 offset = aux_idx * (dev->report_size + 1);
189 if (!memcmp
190 (dev->read_queue + offset, urb->transfer_buffer,
191 dev->report_size)) {
192
193 goto exit;
194 }
195 }
196
197
198 aux_idx = (intr_idx == (MAX_INTERRUPT_BUFFER - 1)) ? 0 : (intr_idx + 1);
199 if (read_idx == aux_idx) {
200
201 read_idx = (++read_idx == MAX_INTERRUPT_BUFFER) ? 0 : read_idx;
202 atomic_set(&dev->read_idx, read_idx);
203 atomic_set(&dev->overflow_flag, 1);
204 }
205
206
207 offset = intr_idx * (dev->report_size + 1);
208 memcpy(dev->read_queue + offset, urb->transfer_buffer,
209 dev->report_size);
210 *(dev->read_queue + offset + (dev->report_size)) = dev->serial_number++;
211
212 atomic_set(&dev->intr_idx, aux_idx);
213
214 wake_up_interruptible(&dev->read_wait);
215
216exit:
217 retval = usb_submit_urb(urb, GFP_ATOMIC);
218 if (retval)
219 dev_err(&dev->interface->dev, "%s - usb_submit_urb failed with result %d\n",
220 __func__, retval);
221
222}
223
224
225
226
227static void iowarrior_write_callback(struct urb *urb)
228{
229 struct iowarrior *dev;
230 int status = urb->status;
231
232 dev = urb->context;
233
234 if (status &&
235 !(status == -ENOENT ||
236 status == -ECONNRESET || status == -ESHUTDOWN)) {
237 dev_dbg(&dev->interface->dev,
238 "nonzero write bulk status received: %d\n", status);
239 }
240
241 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
242 urb->transfer_buffer, urb->transfer_dma);
243
244 atomic_dec(&dev->write_busy);
245 wake_up_interruptible(&dev->write_wait);
246}
247
248
249
250
251static inline void iowarrior_delete(struct iowarrior *dev)
252{
253 dev_dbg(&dev->interface->dev, "minor %d\n", dev->minor);
254 kfree(dev->int_in_buffer);
255 usb_free_urb(dev->int_in_urb);
256 kfree(dev->read_queue);
257 usb_put_intf(dev->interface);
258 kfree(dev);
259}
260
261
262
263
264
265static int read_index(struct iowarrior *dev)
266{
267 int intr_idx, read_idx;
268
269 read_idx = atomic_read(&dev->read_idx);
270 intr_idx = atomic_read(&dev->intr_idx);
271
272 return (read_idx == intr_idx ? -1 : read_idx);
273}
274
275
276
277
278static ssize_t iowarrior_read(struct file *file, char __user *buffer,
279 size_t count, loff_t *ppos)
280{
281 struct iowarrior *dev;
282 int read_idx;
283 int offset;
284
285 dev = file->private_data;
286
287
288 if (!dev || !dev->present)
289 return -ENODEV;
290
291 dev_dbg(&dev->interface->dev, "minor %d, count = %zd\n",
292 dev->minor, count);
293
294
295 if ((count != dev->report_size)
296 && (count != (dev->report_size + 1)))
297 return -EINVAL;
298
299
300 do {
301 atomic_set(&dev->overflow_flag, 0);
302 if ((read_idx = read_index(dev)) == -1) {
303
304 if (file->f_flags & O_NONBLOCK)
305 return -EAGAIN;
306 else {
307
308 int r = wait_event_interruptible(dev->read_wait,
309 (!dev->present
310 || (read_idx =
311 read_index
312 (dev)) !=
313 -1));
314 if (r) {
315
316 return -ERESTART;
317 }
318 if (!dev->present) {
319
320 return -ENODEV;
321 }
322 if (read_idx == -1) {
323
324 return 0;
325 }
326 }
327 }
328
329 offset = read_idx * (dev->report_size + 1);
330 if (copy_to_user(buffer, dev->read_queue + offset, count)) {
331 return -EFAULT;
332 }
333 } while (atomic_read(&dev->overflow_flag));
334
335 read_idx = ++read_idx == MAX_INTERRUPT_BUFFER ? 0 : read_idx;
336 atomic_set(&dev->read_idx, read_idx);
337 return count;
338}
339
340
341
342
343static ssize_t iowarrior_write(struct file *file,
344 const char __user *user_buffer,
345 size_t count, loff_t *ppos)
346{
347 struct iowarrior *dev;
348 int retval = 0;
349 char *buf = NULL;
350 struct urb *int_out_urb = NULL;
351
352 dev = file->private_data;
353
354 mutex_lock(&dev->mutex);
355
356 if (!dev->present) {
357 retval = -ENODEV;
358 goto exit;
359 }
360 dev_dbg(&dev->interface->dev, "minor %d, count = %zd\n",
361 dev->minor, count);
362
363 if (count == 0) {
364 retval = 0;
365 goto exit;
366 }
367
368 if (count != dev->report_size) {
369 retval = -EINVAL;
370 goto exit;
371 }
372 switch (dev->product_id) {
373 case USB_DEVICE_ID_CODEMERCS_IOW24:
374 case USB_DEVICE_ID_CODEMERCS_IOW24SAG:
375 case USB_DEVICE_ID_CODEMERCS_IOWPV1:
376 case USB_DEVICE_ID_CODEMERCS_IOWPV2:
377 case USB_DEVICE_ID_CODEMERCS_IOW40:
378
379 buf = memdup_user(user_buffer, count);
380 if (IS_ERR(buf)) {
381 retval = PTR_ERR(buf);
382 goto exit;
383 }
384 retval = usb_set_report(dev->interface, 2, 0, buf, count);
385 kfree(buf);
386 goto exit;
387 case USB_DEVICE_ID_CODEMERCS_IOW56:
388 case USB_DEVICE_ID_CODEMERCS_IOW56AM:
389 case USB_DEVICE_ID_CODEMERCS_IOW28:
390 case USB_DEVICE_ID_CODEMERCS_IOW28L:
391 case USB_DEVICE_ID_CODEMERCS_IOW100:
392
393 if (atomic_read(&dev->write_busy) == MAX_WRITES_IN_FLIGHT) {
394
395 if (file->f_flags & O_NONBLOCK) {
396 retval = -EAGAIN;
397 goto exit;
398 } else {
399 retval = wait_event_interruptible(dev->write_wait,
400 (!dev->present || (atomic_read (&dev-> write_busy) < MAX_WRITES_IN_FLIGHT)));
401 if (retval) {
402
403 retval = -ERESTART;
404 goto exit;
405 }
406 if (!dev->present) {
407
408 retval = -ENODEV;
409 goto exit;
410 }
411 if (!dev->opened) {
412
413 retval = -ENODEV;
414 goto exit;
415 }
416 }
417 }
418 atomic_inc(&dev->write_busy);
419 int_out_urb = usb_alloc_urb(0, GFP_KERNEL);
420 if (!int_out_urb) {
421 retval = -ENOMEM;
422 goto error_no_urb;
423 }
424 buf = usb_alloc_coherent(dev->udev, dev->report_size,
425 GFP_KERNEL, &int_out_urb->transfer_dma);
426 if (!buf) {
427 retval = -ENOMEM;
428 dev_dbg(&dev->interface->dev,
429 "Unable to allocate buffer\n");
430 goto error_no_buffer;
431 }
432 usb_fill_int_urb(int_out_urb, dev->udev,
433 usb_sndintpipe(dev->udev,
434 dev->int_out_endpoint->bEndpointAddress),
435 buf, dev->report_size,
436 iowarrior_write_callback, dev,
437 dev->int_out_endpoint->bInterval);
438 int_out_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
439 if (copy_from_user(buf, user_buffer, count)) {
440 retval = -EFAULT;
441 goto error;
442 }
443 usb_anchor_urb(int_out_urb, &dev->submitted);
444 retval = usb_submit_urb(int_out_urb, GFP_KERNEL);
445 if (retval) {
446 dev_dbg(&dev->interface->dev,
447 "submit error %d for urb nr.%d\n",
448 retval, atomic_read(&dev->write_busy));
449 usb_unanchor_urb(int_out_urb);
450 goto error;
451 }
452
453 retval = count;
454 usb_free_urb(int_out_urb);
455 goto exit;
456 default:
457
458 dev_err(&dev->interface->dev, "%s - not supported for product=0x%x\n",
459 __func__, dev->product_id);
460 retval = -EFAULT;
461 goto exit;
462 }
463error:
464 usb_free_coherent(dev->udev, dev->report_size, buf,
465 int_out_urb->transfer_dma);
466error_no_buffer:
467 usb_free_urb(int_out_urb);
468error_no_urb:
469 atomic_dec(&dev->write_busy);
470 wake_up_interruptible(&dev->write_wait);
471exit:
472 mutex_unlock(&dev->mutex);
473 return retval;
474}
475
476
477
478
479static long iowarrior_ioctl(struct file *file, unsigned int cmd,
480 unsigned long arg)
481{
482 struct iowarrior *dev = NULL;
483 __u8 *buffer;
484 __u8 __user *user_buffer;
485 int retval;
486 int io_res;
487
488 dev = file->private_data;
489 if (!dev)
490 return -ENODEV;
491
492 buffer = kzalloc(dev->report_size, GFP_KERNEL);
493 if (!buffer)
494 return -ENOMEM;
495
496 mutex_lock(&dev->mutex);
497
498
499 if (!dev->present) {
500 retval = -ENODEV;
501 goto error_out;
502 }
503
504 dev_dbg(&dev->interface->dev, "minor %d, cmd 0x%.4x, arg %ld\n",
505 dev->minor, cmd, arg);
506
507 retval = 0;
508 io_res = 0;
509 switch (cmd) {
510 case IOW_WRITE:
511 if (dev->product_id == USB_DEVICE_ID_CODEMERCS_IOW24 ||
512 dev->product_id == USB_DEVICE_ID_CODEMERCS_IOW24SAG ||
513 dev->product_id == USB_DEVICE_ID_CODEMERCS_IOWPV1 ||
514 dev->product_id == USB_DEVICE_ID_CODEMERCS_IOWPV2 ||
515 dev->product_id == USB_DEVICE_ID_CODEMERCS_IOW40) {
516 user_buffer = (__u8 __user *)arg;
517 io_res = copy_from_user(buffer, user_buffer,
518 dev->report_size);
519 if (io_res) {
520 retval = -EFAULT;
521 } else {
522 io_res = usb_set_report(dev->interface, 2, 0,
523 buffer,
524 dev->report_size);
525 if (io_res < 0)
526 retval = io_res;
527 }
528 } else {
529 retval = -EINVAL;
530 dev_err(&dev->interface->dev,
531 "ioctl 'IOW_WRITE' is not supported for product=0x%x.\n",
532 dev->product_id);
533 }
534 break;
535 case IOW_READ:
536 user_buffer = (__u8 __user *)arg;
537 io_res = usb_get_report(dev->udev,
538 dev->interface->cur_altsetting, 1, 0,
539 buffer, dev->report_size);
540 if (io_res < 0)
541 retval = io_res;
542 else {
543 io_res = copy_to_user(user_buffer, buffer, dev->report_size);
544 if (io_res)
545 retval = -EFAULT;
546 }
547 break;
548 case IOW_GETINFO:
549 {
550
551 struct iowarrior_info info;
552
553 struct usb_config_descriptor *cfg_descriptor = &dev->udev->actconfig->desc;
554
555 memset(&info, 0, sizeof(info));
556
557 info.vendor = le16_to_cpu(dev->udev->descriptor.idVendor);
558 info.product = dev->product_id;
559 info.revision = le16_to_cpu(dev->udev->descriptor.bcdDevice);
560
561
562 info.speed = dev->udev->speed;
563 info.if_num = dev->interface->cur_altsetting->desc.bInterfaceNumber;
564 info.report_size = dev->report_size;
565
566
567 memcpy(info.serial, dev->chip_serial,
568 sizeof(dev->chip_serial));
569 if (cfg_descriptor == NULL) {
570 info.power = -1;
571 } else {
572
573 info.power = cfg_descriptor->bMaxPower * 2;
574 }
575 io_res = copy_to_user((struct iowarrior_info __user *)arg, &info,
576 sizeof(struct iowarrior_info));
577 if (io_res)
578 retval = -EFAULT;
579 break;
580 }
581 default:
582
583 retval = -ENOTTY;
584 break;
585 }
586error_out:
587
588 mutex_unlock(&dev->mutex);
589 kfree(buffer);
590 return retval;
591}
592
593
594
595
596static int iowarrior_open(struct inode *inode, struct file *file)
597{
598 struct iowarrior *dev = NULL;
599 struct usb_interface *interface;
600 int subminor;
601 int retval = 0;
602
603 subminor = iminor(inode);
604
605 interface = usb_find_interface(&iowarrior_driver, subminor);
606 if (!interface) {
607 pr_err("%s - error, can't find device for minor %d\n",
608 __func__, subminor);
609 return -ENODEV;
610 }
611
612 dev = usb_get_intfdata(interface);
613 if (!dev)
614 return -ENODEV;
615
616 mutex_lock(&dev->mutex);
617
618
619 if (dev->opened) {
620 retval = -EBUSY;
621 goto out;
622 }
623
624
625 if ((retval = usb_submit_urb(dev->int_in_urb, GFP_KERNEL)) < 0) {
626 dev_err(&interface->dev, "Error %d while submitting URB\n", retval);
627 retval = -EFAULT;
628 goto out;
629 }
630
631 ++dev->opened;
632
633 file->private_data = dev;
634 retval = 0;
635
636out:
637 mutex_unlock(&dev->mutex);
638 return retval;
639}
640
641
642
643
644static int iowarrior_release(struct inode *inode, struct file *file)
645{
646 struct iowarrior *dev;
647 int retval = 0;
648
649 dev = file->private_data;
650 if (!dev)
651 return -ENODEV;
652
653 dev_dbg(&dev->interface->dev, "minor %d\n", dev->minor);
654
655
656 mutex_lock(&dev->mutex);
657
658 if (dev->opened <= 0) {
659 retval = -ENODEV;
660 mutex_unlock(&dev->mutex);
661 } else {
662 dev->opened = 0;
663 retval = 0;
664 if (dev->present) {
665
666
667
668
669 usb_kill_urb(dev->int_in_urb);
670 wake_up_interruptible(&dev->read_wait);
671 wake_up_interruptible(&dev->write_wait);
672 mutex_unlock(&dev->mutex);
673 } else {
674
675 mutex_unlock(&dev->mutex);
676 iowarrior_delete(dev);
677 }
678 }
679 return retval;
680}
681
682static __poll_t iowarrior_poll(struct file *file, poll_table * wait)
683{
684 struct iowarrior *dev = file->private_data;
685 __poll_t mask = 0;
686
687 if (!dev->present)
688 return EPOLLERR | EPOLLHUP;
689
690 poll_wait(file, &dev->read_wait, wait);
691 poll_wait(file, &dev->write_wait, wait);
692
693 if (!dev->present)
694 return EPOLLERR | EPOLLHUP;
695
696 if (read_index(dev) != -1)
697 mask |= EPOLLIN | EPOLLRDNORM;
698
699 if (atomic_read(&dev->write_busy) < MAX_WRITES_IN_FLIGHT)
700 mask |= EPOLLOUT | EPOLLWRNORM;
701 return mask;
702}
703
704
705
706
707
708
709
710
711
712
713static const struct file_operations iowarrior_fops = {
714 .owner = THIS_MODULE,
715 .write = iowarrior_write,
716 .read = iowarrior_read,
717 .unlocked_ioctl = iowarrior_ioctl,
718 .open = iowarrior_open,
719 .release = iowarrior_release,
720 .poll = iowarrior_poll,
721 .llseek = noop_llseek,
722};
723
724static char *iowarrior_devnode(struct device *dev, umode_t *mode)
725{
726 return kasprintf(GFP_KERNEL, "usb/%s", dev_name(dev));
727}
728
729
730
731
732
733static struct usb_class_driver iowarrior_class = {
734 .name = "iowarrior%d",
735 .devnode = iowarrior_devnode,
736 .fops = &iowarrior_fops,
737 .minor_base = IOWARRIOR_MINOR_BASE,
738};
739
740
741
742
743
744
745
746
747
748
749static int iowarrior_probe(struct usb_interface *interface,
750 const struct usb_device_id *id)
751{
752 struct usb_device *udev = interface_to_usbdev(interface);
753 struct iowarrior *dev = NULL;
754 struct usb_host_interface *iface_desc;
755 int retval = -ENOMEM;
756 int res;
757
758
759 dev = kzalloc(sizeof(struct iowarrior), GFP_KERNEL);
760 if (!dev)
761 return retval;
762
763 mutex_init(&dev->mutex);
764
765 atomic_set(&dev->intr_idx, 0);
766 atomic_set(&dev->read_idx, 0);
767 atomic_set(&dev->overflow_flag, 0);
768 init_waitqueue_head(&dev->read_wait);
769 atomic_set(&dev->write_busy, 0);
770 init_waitqueue_head(&dev->write_wait);
771
772 dev->udev = udev;
773 dev->interface = usb_get_intf(interface);
774
775 iface_desc = interface->cur_altsetting;
776 dev->product_id = le16_to_cpu(udev->descriptor.idProduct);
777
778 init_usb_anchor(&dev->submitted);
779
780 res = usb_find_last_int_in_endpoint(iface_desc, &dev->int_in_endpoint);
781 if (res) {
782 dev_err(&interface->dev, "no interrupt-in endpoint found\n");
783 retval = res;
784 goto error;
785 }
786
787 if ((dev->product_id == USB_DEVICE_ID_CODEMERCS_IOW56) ||
788 (dev->product_id == USB_DEVICE_ID_CODEMERCS_IOW56AM) ||
789 (dev->product_id == USB_DEVICE_ID_CODEMERCS_IOW28) ||
790 (dev->product_id == USB_DEVICE_ID_CODEMERCS_IOW28L) ||
791 (dev->product_id == USB_DEVICE_ID_CODEMERCS_IOW100)) {
792 res = usb_find_last_int_out_endpoint(iface_desc,
793 &dev->int_out_endpoint);
794 if (res) {
795 dev_err(&interface->dev, "no interrupt-out endpoint found\n");
796 retval = res;
797 goto error;
798 }
799 }
800
801
802 dev->report_size = usb_endpoint_maxp(dev->int_in_endpoint);
803
804
805
806
807
808 if (dev->interface->cur_altsetting->desc.bInterfaceNumber == 0) {
809 switch (dev->product_id) {
810 case USB_DEVICE_ID_CODEMERCS_IOW56:
811 case USB_DEVICE_ID_CODEMERCS_IOW56AM:
812 dev->report_size = 7;
813 break;
814
815 case USB_DEVICE_ID_CODEMERCS_IOW28:
816 case USB_DEVICE_ID_CODEMERCS_IOW28L:
817 dev->report_size = 4;
818 break;
819
820 case USB_DEVICE_ID_CODEMERCS_IOW100:
821 dev->report_size = 13;
822 break;
823 }
824 }
825
826
827 dev->int_in_urb = usb_alloc_urb(0, GFP_KERNEL);
828 if (!dev->int_in_urb)
829 goto error;
830 dev->int_in_buffer = kmalloc(dev->report_size, GFP_KERNEL);
831 if (!dev->int_in_buffer)
832 goto error;
833 usb_fill_int_urb(dev->int_in_urb, dev->udev,
834 usb_rcvintpipe(dev->udev,
835 dev->int_in_endpoint->bEndpointAddress),
836 dev->int_in_buffer, dev->report_size,
837 iowarrior_callback, dev,
838 dev->int_in_endpoint->bInterval);
839
840 dev->read_queue =
841 kmalloc_array(dev->report_size + 1, MAX_INTERRUPT_BUFFER,
842 GFP_KERNEL);
843 if (!dev->read_queue)
844 goto error;
845
846 memset(dev->chip_serial, 0x00, sizeof(dev->chip_serial));
847 usb_string(udev, udev->descriptor.iSerialNumber, dev->chip_serial,
848 sizeof(dev->chip_serial));
849 if (strlen(dev->chip_serial) != 8)
850 memset(dev->chip_serial, 0x00, sizeof(dev->chip_serial));
851
852
853 if (dev->interface->cur_altsetting->desc.bInterfaceNumber == 0) {
854 usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
855 0x0A,
856 USB_TYPE_CLASS | USB_RECIP_INTERFACE, 0,
857 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
858 }
859
860 dev->present = 1;
861
862
863 usb_set_intfdata(interface, dev);
864
865 retval = usb_register_dev(interface, &iowarrior_class);
866 if (retval) {
867
868 dev_err(&interface->dev, "Not able to get a minor for this device.\n");
869 goto error;
870 }
871
872 dev->minor = interface->minor;
873
874
875 dev_info(&interface->dev, "IOWarrior product=0x%x, serial=%s interface=%d "
876 "now attached to iowarrior%d\n", dev->product_id, dev->chip_serial,
877 iface_desc->desc.bInterfaceNumber, dev->minor - IOWARRIOR_MINOR_BASE);
878 return retval;
879
880error:
881 iowarrior_delete(dev);
882 return retval;
883}
884
885
886
887
888
889
890static void iowarrior_disconnect(struct usb_interface *interface)
891{
892 struct iowarrior *dev = usb_get_intfdata(interface);
893 int minor = dev->minor;
894
895 usb_deregister_dev(interface, &iowarrior_class);
896
897 mutex_lock(&dev->mutex);
898
899
900 dev->present = 0;
901
902 if (dev->opened) {
903
904
905
906
907 usb_kill_urb(dev->int_in_urb);
908 usb_kill_anchored_urbs(&dev->submitted);
909 wake_up_interruptible(&dev->read_wait);
910 wake_up_interruptible(&dev->write_wait);
911 mutex_unlock(&dev->mutex);
912 } else {
913
914 mutex_unlock(&dev->mutex);
915 iowarrior_delete(dev);
916 }
917
918 dev_info(&interface->dev, "I/O-Warror #%d now disconnected\n",
919 minor - IOWARRIOR_MINOR_BASE);
920}
921
922
923static struct usb_driver iowarrior_driver = {
924 .name = "iowarrior",
925 .probe = iowarrior_probe,
926 .disconnect = iowarrior_disconnect,
927 .id_table = iowarrior_ids,
928};
929
930module_usb_driver(iowarrior_driver);
931