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16#include <linux/module.h>
17#include <linux/usb.h>
18#include <linux/init.h>
19#include <linux/slab.h>
20#include <linux/sched.h>
21#include <linux/smp_lock.h>
22#include <linux/poll.h>
23#include <linux/usb/iowarrior.h>
24
25
26#define DRIVER_VERSION "v0.4.0"
27#define DRIVER_AUTHOR "Christian Lucht <lucht@codemercs.com>"
28#define DRIVER_DESC "USB IO-Warrior driver (Linux 2.6.x)"
29
30#define USB_VENDOR_ID_CODEMERCS 1984
31
32#define USB_DEVICE_ID_CODEMERCS_IOW40 0x1500
33#define USB_DEVICE_ID_CODEMERCS_IOW24 0x1501
34#define USB_DEVICE_ID_CODEMERCS_IOWPV1 0x1511
35#define USB_DEVICE_ID_CODEMERCS_IOWPV2 0x1512
36
37#define USB_DEVICE_ID_CODEMERCS_IOW56 0x1503
38
39
40#ifdef CONFIG_USB_DYNAMIC_MINORS
41#define IOWARRIOR_MINOR_BASE 0
42#else
43#define IOWARRIOR_MINOR_BASE 208
44#endif
45
46
47#define MAX_INTERRUPT_BUFFER 16
48
49
50
51
52
53#define MAX_WRITES_IN_FLIGHT 4
54
55
56#undef dbg
57#define dbg( format, arg... ) do { if( debug ) printk( KERN_DEBUG __FILE__ ": " format "\n" , ## arg ); } while ( 0 )
58
59MODULE_AUTHOR(DRIVER_AUTHOR);
60MODULE_DESCRIPTION(DRIVER_DESC);
61MODULE_LICENSE("GPL");
62
63
64static int debug = 0;
65module_param(debug, bool, 0644);
66MODULE_PARM_DESC(debug, "debug=1 enables debugging messages");
67
68static struct usb_driver iowarrior_driver;
69static DEFINE_MUTEX(iowarrior_open_disc_lock);
70
71
72
73
74
75
76struct iowarrior {
77 struct mutex mutex;
78 struct usb_device *udev;
79 struct usb_interface *interface;
80 unsigned char minor;
81 struct usb_endpoint_descriptor *int_out_endpoint;
82 struct usb_endpoint_descriptor *int_in_endpoint;
83 struct urb *int_in_urb;
84 unsigned char *int_in_buffer;
85 unsigned char serial_number;
86 unsigned char *read_queue;
87 wait_queue_head_t read_wait;
88 wait_queue_head_t write_wait;
89 atomic_t write_busy;
90 atomic_t read_idx;
91 atomic_t intr_idx;
92 spinlock_t intr_idx_lock;
93 atomic_t overflow_flag;
94 int present;
95 int opened;
96 char chip_serial[9];
97 int report_size;
98 u16 product_id;
99};
100
101
102
103
104
105
106
107
108#define GET_TIMEOUT 5
109#define USB_REQ_GET_REPORT 0x01
110
111static int usb_get_report(struct usb_device *dev,
112 struct usb_host_interface *inter, unsigned char type,
113 unsigned char id, void *buf, int size)
114{
115 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
116 USB_REQ_GET_REPORT,
117 USB_DIR_IN | USB_TYPE_CLASS |
118 USB_RECIP_INTERFACE, (type << 8) + id,
119 inter->desc.bInterfaceNumber, buf, size,
120 GET_TIMEOUT*HZ);
121}
122
123
124#define USB_REQ_SET_REPORT 0x09
125
126static int usb_set_report(struct usb_interface *intf, unsigned char type,
127 unsigned char id, void *buf, int size)
128{
129 return usb_control_msg(interface_to_usbdev(intf),
130 usb_sndctrlpipe(interface_to_usbdev(intf), 0),
131 USB_REQ_SET_REPORT,
132 USB_TYPE_CLASS | USB_RECIP_INTERFACE,
133 (type << 8) + id,
134 intf->cur_altsetting->desc.bInterfaceNumber, buf,
135 size, HZ);
136}
137
138
139
140
141
142static struct usb_device_id iowarrior_ids[] = {
143 {USB_DEVICE(USB_VENDOR_ID_CODEMERCS, USB_DEVICE_ID_CODEMERCS_IOW40)},
144 {USB_DEVICE(USB_VENDOR_ID_CODEMERCS, USB_DEVICE_ID_CODEMERCS_IOW24)},
145 {USB_DEVICE(USB_VENDOR_ID_CODEMERCS, USB_DEVICE_ID_CODEMERCS_IOWPV1)},
146 {USB_DEVICE(USB_VENDOR_ID_CODEMERCS, USB_DEVICE_ID_CODEMERCS_IOWPV2)},
147 {USB_DEVICE(USB_VENDOR_ID_CODEMERCS, USB_DEVICE_ID_CODEMERCS_IOW56)},
148 {}
149};
150MODULE_DEVICE_TABLE(usb, iowarrior_ids);
151
152
153
154
155static void iowarrior_callback(struct urb *urb)
156{
157 struct iowarrior *dev = urb->context;
158 int intr_idx;
159 int read_idx;
160 int aux_idx;
161 int offset;
162 int status = urb->status;
163 int retval;
164
165 switch (status) {
166 case 0:
167
168 break;
169 case -ECONNRESET:
170 case -ENOENT:
171 case -ESHUTDOWN:
172 return;
173 default:
174 goto exit;
175 }
176
177 spin_lock(&dev->intr_idx_lock);
178 intr_idx = atomic_read(&dev->intr_idx);
179
180 aux_idx = (intr_idx == 0) ? (MAX_INTERRUPT_BUFFER - 1) : (intr_idx - 1);
181 read_idx = atomic_read(&dev->read_idx);
182
183
184 if ((intr_idx != read_idx)
185 && (dev->interface->cur_altsetting->desc.bInterfaceNumber == 0)) {
186
187 offset = aux_idx * (dev->report_size + 1);
188 if (!memcmp
189 (dev->read_queue + offset, urb->transfer_buffer,
190 dev->report_size)) {
191
192 spin_unlock(&dev->intr_idx_lock);
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 spin_unlock(&dev->intr_idx_lock);
214
215 wake_up_interruptible(&dev->read_wait);
216
217exit:
218 retval = usb_submit_urb(urb, GFP_ATOMIC);
219 if (retval)
220 dev_err(&dev->interface->dev, "%s - usb_submit_urb failed with result %d\n",
221 __func__, retval);
222
223}
224
225
226
227
228static void iowarrior_write_callback(struct urb *urb)
229{
230 struct iowarrior *dev;
231 int status = urb->status;
232
233 dev = urb->context;
234
235 if (status &&
236 !(status == -ENOENT ||
237 status == -ECONNRESET || status == -ESHUTDOWN)) {
238 dbg("%s - nonzero write bulk status received: %d",
239 __func__, status);
240 }
241
242 usb_buffer_free(urb->dev, urb->transfer_buffer_length,
243 urb->transfer_buffer, urb->transfer_dma);
244
245 atomic_dec(&dev->write_busy);
246 wake_up_interruptible(&dev->write_wait);
247}
248
249
250
251
252static inline void iowarrior_delete(struct iowarrior *dev)
253{
254 dbg("%s - minor %d", __func__, dev->minor);
255 kfree(dev->int_in_buffer);
256 usb_free_urb(dev->int_in_urb);
257 kfree(dev->read_queue);
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 = (struct iowarrior *)file->private_data;
286
287
288 if (dev == NULL || !dev->present)
289 return -ENODEV;
290
291 dbg("%s - minor %d, count = %zd", __func__, dev->minor, count);
292
293
294 if ((count != dev->report_size)
295 && (count != (dev->report_size + 1)))
296 return -EINVAL;
297
298
299 do {
300 atomic_set(&dev->overflow_flag, 0);
301 if ((read_idx = read_index(dev)) == -1) {
302
303 if (file->f_flags & O_NONBLOCK)
304 return -EAGAIN;
305 else {
306
307 int r = wait_event_interruptible(dev->read_wait,
308 (!dev->present
309 || (read_idx =
310 read_index
311 (dev)) !=
312 -1));
313 if (r) {
314
315 return -ERESTART;
316 }
317 if (!dev->present) {
318
319 return -ENODEV;
320 }
321 if (read_idx == -1) {
322
323 return 0;
324 }
325 }
326 }
327
328 offset = read_idx * (dev->report_size + 1);
329 if (copy_to_user(buffer, dev->read_queue + offset, count)) {
330 return -EFAULT;
331 }
332 } while (atomic_read(&dev->overflow_flag));
333
334 read_idx = ++read_idx == MAX_INTERRUPT_BUFFER ? 0 : read_idx;
335 atomic_set(&dev->read_idx, read_idx);
336 return count;
337}
338
339
340
341
342static ssize_t iowarrior_write(struct file *file,
343 const char __user *user_buffer,
344 size_t count, loff_t *ppos)
345{
346 struct iowarrior *dev;
347 int retval = 0;
348 char *buf = NULL;
349 struct urb *int_out_urb = NULL;
350
351 dev = (struct iowarrior *)file->private_data;
352
353 mutex_lock(&dev->mutex);
354
355 if (!dev->present) {
356 retval = -ENODEV;
357 goto exit;
358 }
359 dbg("%s - minor %d, count = %zd", __func__, dev->minor, count);
360
361 if (count == 0) {
362 retval = 0;
363 goto exit;
364 }
365
366 if (count != dev->report_size) {
367 retval = -EINVAL;
368 goto exit;
369 }
370 switch (dev->product_id) {
371 case USB_DEVICE_ID_CODEMERCS_IOW24:
372 case USB_DEVICE_ID_CODEMERCS_IOWPV1:
373 case USB_DEVICE_ID_CODEMERCS_IOWPV2:
374 case USB_DEVICE_ID_CODEMERCS_IOW40:
375
376 buf = kmalloc(8, GFP_KERNEL);
377 if (!buf) {
378 retval = -ENOMEM;
379 goto exit;
380 }
381 if (copy_from_user(buf, user_buffer, count)) {
382 retval = -EFAULT;
383 kfree(buf);
384 goto exit;
385 }
386 retval = usb_set_report(dev->interface, 2, 0, buf, count);
387 kfree(buf);
388 goto exit;
389 break;
390 case USB_DEVICE_ID_CODEMERCS_IOW56:
391
392 if (atomic_read(&dev->write_busy) == MAX_WRITES_IN_FLIGHT) {
393
394 if (file->f_flags & O_NONBLOCK) {
395 retval = -EAGAIN;
396 goto exit;
397 } else {
398 retval = wait_event_interruptible(dev->write_wait,
399 (!dev->present || (atomic_read (&dev-> write_busy) < MAX_WRITES_IN_FLIGHT)));
400 if (retval) {
401
402 retval = -ERESTART;
403 goto exit;
404 }
405 if (!dev->present) {
406
407 retval = -ENODEV;
408 goto exit;
409 }
410 if (!dev->opened) {
411
412 retval = -ENODEV;
413 goto exit;
414 }
415 }
416 }
417 atomic_inc(&dev->write_busy);
418 int_out_urb = usb_alloc_urb(0, GFP_KERNEL);
419 if (!int_out_urb) {
420 retval = -ENOMEM;
421 dbg("%s Unable to allocate urb ", __func__);
422 goto error_no_urb;
423 }
424 buf = usb_buffer_alloc(dev->udev, dev->report_size,
425 GFP_KERNEL, &int_out_urb->transfer_dma);
426 if (!buf) {
427 retval = -ENOMEM;
428 dbg("%s Unable to allocate buffer ", __func__);
429 goto error_no_buffer;
430 }
431 usb_fill_int_urb(int_out_urb, dev->udev,
432 usb_sndintpipe(dev->udev,
433 dev->int_out_endpoint->bEndpointAddress),
434 buf, dev->report_size,
435 iowarrior_write_callback, dev,
436 dev->int_out_endpoint->bInterval);
437 int_out_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
438 if (copy_from_user(buf, user_buffer, count)) {
439 retval = -EFAULT;
440 goto error;
441 }
442 retval = usb_submit_urb(int_out_urb, GFP_KERNEL);
443 if (retval) {
444 dbg("%s submit error %d for urb nr.%d", __func__,
445 retval, atomic_read(&dev->write_busy));
446 goto error;
447 }
448
449 retval = count;
450 usb_free_urb(int_out_urb);
451 goto exit;
452 break;
453 default:
454
455 dev_err(&dev->interface->dev, "%s - not supported for product=0x%x\n",
456 __func__, dev->product_id);
457 retval = -EFAULT;
458 goto exit;
459 break;
460 }
461error:
462 usb_buffer_free(dev->udev, dev->report_size, buf,
463 int_out_urb->transfer_dma);
464error_no_buffer:
465 usb_free_urb(int_out_urb);
466error_no_urb:
467 atomic_dec(&dev->write_busy);
468 wake_up_interruptible(&dev->write_wait);
469exit:
470 mutex_unlock(&dev->mutex);
471 return retval;
472}
473
474
475
476
477static long iowarrior_ioctl(struct file *file, unsigned int cmd,
478 unsigned long arg)
479{
480 struct iowarrior *dev = NULL;
481 __u8 *buffer;
482 __u8 __user *user_buffer;
483 int retval;
484 int io_res;
485
486 dev = (struct iowarrior *)file->private_data;
487 if (dev == NULL) {
488 return -ENODEV;
489 }
490
491 buffer = kzalloc(dev->report_size, GFP_KERNEL);
492 if (!buffer)
493 return -ENOMEM;
494
495
496 lock_kernel();
497 mutex_lock(&dev->mutex);
498
499
500 if (!dev->present) {
501 retval = -ENODEV;
502 goto error_out;
503 }
504
505 dbg("%s - minor %d, cmd 0x%.4x, arg %ld", __func__, dev->minor, cmd,
506 arg);
507
508 retval = 0;
509 io_res = 0;
510 switch (cmd) {
511 case IOW_WRITE:
512 if (dev->product_id == USB_DEVICE_ID_CODEMERCS_IOW24 ||
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 < 0)
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
556 info.vendor = le16_to_cpu(dev->udev->descriptor.idVendor);
557 info.product = dev->product_id;
558 info.revision = le16_to_cpu(dev->udev->descriptor.bcdDevice);
559
560
561 info.speed = le16_to_cpu(dev->udev->speed);
562 info.if_num = dev->interface->cur_altsetting->desc.bInterfaceNumber;
563 info.report_size = dev->report_size;
564
565
566 memcpy(info.serial, dev->chip_serial,
567 sizeof(dev->chip_serial));
568 if (cfg_descriptor == NULL) {
569 info.power = -1;
570 } else {
571
572 info.power = cfg_descriptor->bMaxPower * 2;
573 }
574 io_res = copy_to_user((struct iowarrior_info __user *)arg, &info,
575 sizeof(struct iowarrior_info));
576 if (io_res < 0)
577 retval = -EFAULT;
578 break;
579 }
580 default:
581
582 retval = -ENOTTY;
583 break;
584 }
585error_out:
586
587 mutex_unlock(&dev->mutex);
588 unlock_kernel();
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 dbg("%s", __func__);
604
605 subminor = iminor(inode);
606
607 interface = usb_find_interface(&iowarrior_driver, subminor);
608 if (!interface) {
609 err("%s - error, can't find device for minor %d", __func__,
610 subminor);
611 return -ENODEV;
612 }
613
614 mutex_lock(&iowarrior_open_disc_lock);
615 dev = usb_get_intfdata(interface);
616 if (!dev) {
617 mutex_unlock(&iowarrior_open_disc_lock);
618 return -ENODEV;
619 }
620
621 mutex_lock(&dev->mutex);
622 mutex_unlock(&iowarrior_open_disc_lock);
623
624
625 if (dev->opened) {
626 retval = -EBUSY;
627 goto out;
628 }
629
630
631 if ((retval = usb_submit_urb(dev->int_in_urb, GFP_KERNEL)) < 0) {
632 dev_err(&interface->dev, "Error %d while submitting URB\n", retval);
633 retval = -EFAULT;
634 goto out;
635 }
636
637 ++dev->opened;
638
639 file->private_data = dev;
640 retval = 0;
641
642out:
643 mutex_unlock(&dev->mutex);
644 return retval;
645}
646
647
648
649
650static int iowarrior_release(struct inode *inode, struct file *file)
651{
652 struct iowarrior *dev;
653 int retval = 0;
654
655 dev = (struct iowarrior *)file->private_data;
656 if (dev == NULL) {
657 return -ENODEV;
658 }
659
660 dbg("%s - minor %d", __func__, dev->minor);
661
662
663 mutex_lock(&dev->mutex);
664
665 if (dev->opened <= 0) {
666 retval = -ENODEV;
667 mutex_unlock(&dev->mutex);
668 } else {
669 dev->opened = 0;
670 retval = 0;
671 if (dev->present) {
672
673
674
675
676 usb_kill_urb(dev->int_in_urb);
677 wake_up_interruptible(&dev->read_wait);
678 wake_up_interruptible(&dev->write_wait);
679 mutex_unlock(&dev->mutex);
680 } else {
681
682 mutex_unlock(&dev->mutex);
683 iowarrior_delete(dev);
684 }
685 }
686 return retval;
687}
688
689static unsigned iowarrior_poll(struct file *file, poll_table * wait)
690{
691 struct iowarrior *dev = file->private_data;
692 unsigned int mask = 0;
693
694 if (!dev->present)
695 return POLLERR | POLLHUP;
696
697 poll_wait(file, &dev->read_wait, wait);
698 poll_wait(file, &dev->write_wait, wait);
699
700 if (!dev->present)
701 return POLLERR | POLLHUP;
702
703 if (read_index(dev) != -1)
704 mask |= POLLIN | POLLRDNORM;
705
706 if (atomic_read(&dev->write_busy) < MAX_WRITES_IN_FLIGHT)
707 mask |= POLLOUT | POLLWRNORM;
708 return mask;
709}
710
711
712
713
714
715
716
717
718
719
720static const struct file_operations iowarrior_fops = {
721 .owner = THIS_MODULE,
722 .write = iowarrior_write,
723 .read = iowarrior_read,
724 .unlocked_ioctl = iowarrior_ioctl,
725 .open = iowarrior_open,
726 .release = iowarrior_release,
727 .poll = iowarrior_poll,
728};
729
730static char *iowarrior_devnode(struct device *dev, mode_t *mode)
731{
732 return kasprintf(GFP_KERNEL, "usb/%s", dev_name(dev));
733}
734
735
736
737
738
739static struct usb_class_driver iowarrior_class = {
740 .name = "iowarrior%d",
741 .devnode = iowarrior_devnode,
742 .fops = &iowarrior_fops,
743 .minor_base = IOWARRIOR_MINOR_BASE,
744};
745
746
747
748
749
750
751
752
753
754
755static int iowarrior_probe(struct usb_interface *interface,
756 const struct usb_device_id *id)
757{
758 struct usb_device *udev = interface_to_usbdev(interface);
759 struct iowarrior *dev = NULL;
760 struct usb_host_interface *iface_desc;
761 struct usb_endpoint_descriptor *endpoint;
762 int i;
763 int retval = -ENOMEM;
764
765
766 dev = kzalloc(sizeof(struct iowarrior), GFP_KERNEL);
767 if (dev == NULL) {
768 dev_err(&interface->dev, "Out of memory\n");
769 return retval;
770 }
771
772 mutex_init(&dev->mutex);
773
774 atomic_set(&dev->intr_idx, 0);
775 atomic_set(&dev->read_idx, 0);
776 spin_lock_init(&dev->intr_idx_lock);
777 atomic_set(&dev->overflow_flag, 0);
778 init_waitqueue_head(&dev->read_wait);
779 atomic_set(&dev->write_busy, 0);
780 init_waitqueue_head(&dev->write_wait);
781
782 dev->udev = udev;
783 dev->interface = interface;
784
785 iface_desc = interface->cur_altsetting;
786 dev->product_id = le16_to_cpu(udev->descriptor.idProduct);
787
788
789 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
790 endpoint = &iface_desc->endpoint[i].desc;
791
792 if (usb_endpoint_is_int_in(endpoint))
793 dev->int_in_endpoint = endpoint;
794 if (usb_endpoint_is_int_out(endpoint))
795
796 dev->int_out_endpoint = endpoint;
797 }
798
799 dev->report_size = le16_to_cpu(dev->int_in_endpoint->wMaxPacketSize);
800 if ((dev->interface->cur_altsetting->desc.bInterfaceNumber == 0) &&
801 (dev->product_id == USB_DEVICE_ID_CODEMERCS_IOW56))
802
803 dev->report_size = 7;
804
805
806 dev->int_in_urb = usb_alloc_urb(0, GFP_KERNEL);
807 if (!dev->int_in_urb) {
808 dev_err(&interface->dev, "Couldn't allocate interrupt_in_urb\n");
809 goto error;
810 }
811 dev->int_in_buffer = kmalloc(dev->report_size, GFP_KERNEL);
812 if (!dev->int_in_buffer) {
813 dev_err(&interface->dev, "Couldn't allocate int_in_buffer\n");
814 goto error;
815 }
816 usb_fill_int_urb(dev->int_in_urb, dev->udev,
817 usb_rcvintpipe(dev->udev,
818 dev->int_in_endpoint->bEndpointAddress),
819 dev->int_in_buffer, dev->report_size,
820 iowarrior_callback, dev,
821 dev->int_in_endpoint->bInterval);
822
823 dev->read_queue =
824 kmalloc(((dev->report_size + 1) * MAX_INTERRUPT_BUFFER),
825 GFP_KERNEL);
826 if (!dev->read_queue) {
827 dev_err(&interface->dev, "Couldn't allocate read_queue\n");
828 goto error;
829 }
830
831 memset(dev->chip_serial, 0x00, sizeof(dev->chip_serial));
832 usb_string(udev, udev->descriptor.iSerialNumber, dev->chip_serial,
833 sizeof(dev->chip_serial));
834 if (strlen(dev->chip_serial) != 8)
835 memset(dev->chip_serial, 0x00, sizeof(dev->chip_serial));
836
837
838 if (dev->interface->cur_altsetting->desc.bInterfaceNumber == 0) {
839 usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
840 0x0A,
841 USB_TYPE_CLASS | USB_RECIP_INTERFACE, 0,
842 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
843 }
844
845 dev->present = 1;
846
847
848 usb_set_intfdata(interface, dev);
849
850 retval = usb_register_dev(interface, &iowarrior_class);
851 if (retval) {
852
853 dev_err(&interface->dev, "Not able to get a minor for this device.\n");
854 usb_set_intfdata(interface, NULL);
855 goto error;
856 }
857
858 dev->minor = interface->minor;
859
860
861 dev_info(&interface->dev, "IOWarrior product=0x%x, serial=%s interface=%d "
862 "now attached to iowarrior%d\n", dev->product_id, dev->chip_serial,
863 iface_desc->desc.bInterfaceNumber, dev->minor - IOWARRIOR_MINOR_BASE);
864 return retval;
865
866error:
867 iowarrior_delete(dev);
868 return retval;
869}
870
871
872
873
874
875
876static void iowarrior_disconnect(struct usb_interface *interface)
877{
878 struct iowarrior *dev;
879 int minor;
880
881 dev = usb_get_intfdata(interface);
882 mutex_lock(&iowarrior_open_disc_lock);
883 usb_set_intfdata(interface, NULL);
884
885 minor = dev->minor;
886
887
888 usb_deregister_dev(interface, &iowarrior_class);
889
890 mutex_lock(&dev->mutex);
891
892
893 dev->present = 0;
894
895 mutex_unlock(&dev->mutex);
896 mutex_unlock(&iowarrior_open_disc_lock);
897
898 if (dev->opened) {
899
900
901
902
903 usb_kill_urb(dev->int_in_urb);
904 wake_up_interruptible(&dev->read_wait);
905 wake_up_interruptible(&dev->write_wait);
906 } else {
907
908 iowarrior_delete(dev);
909 }
910
911 dev_info(&interface->dev, "I/O-Warror #%d now disconnected\n",
912 minor - IOWARRIOR_MINOR_BASE);
913}
914
915
916static struct usb_driver iowarrior_driver = {
917 .name = "iowarrior",
918 .probe = iowarrior_probe,
919 .disconnect = iowarrior_disconnect,
920 .id_table = iowarrior_ids,
921};
922
923static int __init iowarrior_init(void)
924{
925 return usb_register(&iowarrior_driver);
926}
927
928static void __exit iowarrior_exit(void)
929{
930 usb_deregister(&iowarrior_driver);
931}
932
933module_init(iowarrior_init);
934module_exit(iowarrior_exit);
935