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20#include <linux/kernel.h>
21#include <linux/errno.h>
22#include <linux/init.h>
23#include <linux/slab.h>
24#include <linux/smp_lock.h>
25#include <linux/tty.h>
26#include <linux/tty_driver.h>
27#include <linux/tty_flip.h>
28#include <linux/module.h>
29#include <linux/moduleparam.h>
30#include <linux/seq_file.h>
31#include <linux/spinlock.h>
32#include <linux/mutex.h>
33#include <linux/list.h>
34#include <linux/uaccess.h>
35#include <linux/serial.h>
36#include <linux/usb.h>
37#include <linux/usb/serial.h>
38#include <linux/kfifo.h>
39#include "pl2303.h"
40
41
42
43
44#define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com, http://www.kroah.com/linux/"
45#define DRIVER_DESC "USB Serial Driver core"
46
47
48static struct usb_driver usb_serial_driver = {
49 .name = "usbserial",
50 .probe = usb_serial_probe,
51 .disconnect = usb_serial_disconnect,
52 .suspend = usb_serial_suspend,
53 .resume = usb_serial_resume,
54 .no_dynamic_id = 1,
55};
56
57
58
59
60
61
62
63
64static int debug;
65
66static struct usb_serial *serial_table[SERIAL_TTY_MINORS];
67static DEFINE_MUTEX(table_lock);
68static LIST_HEAD(usb_serial_driver_list);
69
70
71
72
73
74
75struct usb_serial *usb_serial_get_by_index(unsigned index)
76{
77 struct usb_serial *serial;
78
79 mutex_lock(&table_lock);
80 serial = serial_table[index];
81
82 if (serial) {
83 mutex_lock(&serial->disc_mutex);
84 if (serial->disconnected) {
85 mutex_unlock(&serial->disc_mutex);
86 serial = NULL;
87 } else {
88 kref_get(&serial->kref);
89 }
90 }
91 mutex_unlock(&table_lock);
92 return serial;
93}
94
95static struct usb_serial *get_free_serial(struct usb_serial *serial,
96 int num_ports, unsigned int *minor)
97{
98 unsigned int i, j;
99 int good_spot;
100
101 dbg("%s %d", __func__, num_ports);
102
103 *minor = 0;
104 mutex_lock(&table_lock);
105 for (i = 0; i < SERIAL_TTY_MINORS; ++i) {
106 if (serial_table[i])
107 continue;
108
109 good_spot = 1;
110 for (j = 1; j <= num_ports-1; ++j)
111 if ((i+j >= SERIAL_TTY_MINORS) || (serial_table[i+j])) {
112 good_spot = 0;
113 i += j;
114 break;
115 }
116 if (good_spot == 0)
117 continue;
118
119 *minor = i;
120 j = 0;
121 dbg("%s - minor base = %d", __func__, *minor);
122 for (i = *minor; (i < (*minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i) {
123 serial_table[i] = serial;
124 serial->port[j++]->number = i;
125 }
126 mutex_unlock(&table_lock);
127 return serial;
128 }
129 mutex_unlock(&table_lock);
130 return NULL;
131}
132
133static void return_serial(struct usb_serial *serial)
134{
135 int i;
136
137 dbg("%s", __func__);
138
139 mutex_lock(&table_lock);
140 for (i = 0; i < serial->num_ports; ++i)
141 serial_table[serial->minor + i] = NULL;
142 mutex_unlock(&table_lock);
143}
144
145static void destroy_serial(struct kref *kref)
146{
147 struct usb_serial *serial;
148 struct usb_serial_port *port;
149 int i;
150
151 serial = to_usb_serial(kref);
152
153 dbg("%s - %s", __func__, serial->type->description);
154
155
156 if (serial->minor != SERIAL_TTY_NO_MINOR)
157 return_serial(serial);
158
159 if (serial->attached)
160 serial->type->release(serial);
161
162
163 for (i = 0; i < serial->num_port_pointers; ++i) {
164 port = serial->port[i];
165 if (port) {
166 port->serial = NULL;
167 put_device(&port->dev);
168 }
169 }
170
171 usb_put_dev(serial->dev);
172 kfree(serial);
173}
174
175void usb_serial_put(struct usb_serial *serial)
176{
177 kref_put(&serial->kref, destroy_serial);
178}
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196
197
198static int serial_install(struct tty_driver *driver, struct tty_struct *tty)
199{
200 int idx = tty->index;
201 struct usb_serial *serial;
202 struct usb_serial_port *port;
203 int retval = -ENODEV;
204
205 dbg("%s", __func__);
206
207 serial = usb_serial_get_by_index(idx);
208 if (!serial)
209 return retval;
210
211 port = serial->port[idx - serial->minor];
212 if (!port)
213 goto error_no_port;
214 if (!try_module_get(serial->type->driver.owner))
215 goto error_module_get;
216
217
218 retval = tty_init_termios(tty);
219 if (retval)
220 goto error_init_termios;
221
222 retval = usb_autopm_get_interface(serial->interface);
223 if (retval)
224 goto error_get_interface;
225
226 mutex_unlock(&serial->disc_mutex);
227
228
229 if (serial->type->init_termios)
230 serial->type->init_termios(tty);
231
232 tty->driver_data = port;
233
234
235 tty_driver_kref_get(driver);
236 tty->count++;
237 driver->ttys[idx] = tty;
238 return retval;
239
240 error_get_interface:
241 error_init_termios:
242 module_put(serial->type->driver.owner);
243 error_module_get:
244 error_no_port:
245 usb_serial_put(serial);
246 mutex_unlock(&serial->disc_mutex);
247 return retval;
248}
249
250static int serial_open(struct tty_struct *tty, struct file *filp)
251{
252 struct usb_serial_port *port = tty->driver_data;
253 struct usb_serial *serial = port->serial;
254 int retval;
255
256 dbg("%s - port %d", __func__, port->number);
257
258 spin_lock_irq(&port->port.lock);
259 if (!tty_hung_up_p(filp))
260 ++port->port.count;
261 spin_unlock_irq(&port->port.lock);
262 tty_port_tty_set(&port->port, tty);
263
264
265
266
267 if (!test_bit(ASYNCB_INITIALIZED, &port->port.flags)) {
268 if (mutex_lock_interruptible(&port->mutex))
269 return -ERESTARTSYS;
270 mutex_lock(&serial->disc_mutex);
271 if (serial->disconnected)
272 retval = -ENODEV;
273 else
274 retval = port->serial->type->open(tty, port);
275 mutex_unlock(&serial->disc_mutex);
276 mutex_unlock(&port->mutex);
277 if (retval)
278 return retval;
279 set_bit(ASYNCB_INITIALIZED, &port->port.flags);
280 }
281
282
283 retval = tty_port_block_til_ready(&port->port, tty, filp);
284 return retval;
285}
286
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291
292
293
294static void serial_down(struct usb_serial_port *port)
295{
296 struct usb_serial_driver *drv = port->serial->type;
297
298
299
300
301
302 if (port->console)
303 return;
304
305
306
307
308 if (!test_and_clear_bit(ASYNCB_INITIALIZED, &port->port.flags))
309 return;
310
311 mutex_lock(&port->mutex);
312 if (drv->close)
313 drv->close(port);
314 mutex_unlock(&port->mutex);
315}
316
317static void serial_hangup(struct tty_struct *tty)
318{
319 struct usb_serial_port *port = tty->driver_data;
320
321 dbg("%s - port %d", __func__, port->number);
322
323 serial_down(port);
324 tty_port_hangup(&port->port);
325}
326
327static void serial_close(struct tty_struct *tty, struct file *filp)
328{
329 struct usb_serial_port *port = tty->driver_data;
330
331 dbg("%s - port %d", __func__, port->number);
332
333 if (tty_hung_up_p(filp))
334 return;
335 if (tty_port_close_start(&port->port, tty, filp) == 0)
336 return;
337 serial_down(port);
338 tty_port_close_end(&port->port, tty);
339 tty_port_tty_set(&port->port, NULL);
340}
341
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351
352static void serial_cleanup(struct tty_struct *tty)
353{
354 struct usb_serial_port *port = tty->driver_data;
355 struct usb_serial *serial;
356 struct module *owner;
357
358
359
360
361 if (port->console)
362 return;
363
364 dbg("%s - port %d", __func__, port->number);
365
366 tty->driver_data = NULL;
367
368 serial = port->serial;
369 owner = serial->type->driver.owner;
370
371 mutex_lock(&serial->disc_mutex);
372 if (!serial->disconnected)
373 usb_autopm_put_interface(serial->interface);
374 mutex_unlock(&serial->disc_mutex);
375
376 usb_serial_put(serial);
377 module_put(owner);
378}
379
380static int serial_write(struct tty_struct *tty, const unsigned char *buf,
381 int count)
382{
383 struct usb_serial_port *port = tty->driver_data;
384 int retval = -ENODEV;
385
386 if (port->serial->dev->state == USB_STATE_NOTATTACHED)
387 goto exit;
388
389 dbg("%s - port %d, %d byte(s)", __func__, port->number, count);
390
391
392
393 WARN_ON(!port->port.count);
394
395
396 retval = port->serial->type->write(tty, port, buf, count);
397
398exit:
399 return retval;
400}
401
402static int serial_write_room(struct tty_struct *tty)
403{
404 struct usb_serial_port *port = tty->driver_data;
405 dbg("%s - port %d", __func__, port->number);
406 WARN_ON(!port->port.count);
407
408 return port->serial->type->write_room(tty);
409}
410
411static int serial_chars_in_buffer(struct tty_struct *tty)
412{
413 struct usb_serial_port *port = tty->driver_data;
414 dbg("%s = port %d", __func__, port->number);
415
416
417
418 if (port->serial->disconnected)
419 return 0;
420
421 return port->serial->type->chars_in_buffer(tty);
422}
423
424static void serial_throttle(struct tty_struct *tty)
425{
426 struct usb_serial_port *port = tty->driver_data;
427 dbg("%s - port %d", __func__, port->number);
428
429 WARN_ON(!port->port.count);
430
431 if (port->serial->type->throttle)
432 port->serial->type->throttle(tty);
433}
434
435static void serial_unthrottle(struct tty_struct *tty)
436{
437 struct usb_serial_port *port = tty->driver_data;
438 dbg("%s - port %d", __func__, port->number);
439
440 WARN_ON(!port->port.count);
441
442 if (port->serial->type->unthrottle)
443 port->serial->type->unthrottle(tty);
444}
445
446static int serial_ioctl(struct tty_struct *tty, struct file *file,
447 unsigned int cmd, unsigned long arg)
448{
449 struct usb_serial_port *port = tty->driver_data;
450 int retval = -ENODEV;
451
452 dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd);
453
454 WARN_ON(!port->port.count);
455
456
457
458 if (port->serial->type->ioctl) {
459 retval = port->serial->type->ioctl(tty, file, cmd, arg);
460 } else
461 retval = -ENOIOCTLCMD;
462 return retval;
463}
464
465static void serial_set_termios(struct tty_struct *tty, struct ktermios *old)
466{
467 struct usb_serial_port *port = tty->driver_data;
468 dbg("%s - port %d", __func__, port->number);
469
470 WARN_ON(!port->port.count);
471
472
473 if (port->serial->type->set_termios)
474 port->serial->type->set_termios(tty, port, old);
475 else
476 tty_termios_copy_hw(tty->termios, old);
477}
478
479static int serial_break(struct tty_struct *tty, int break_state)
480{
481 struct usb_serial_port *port = tty->driver_data;
482
483 dbg("%s - port %d", __func__, port->number);
484
485 WARN_ON(!port->port.count);
486
487
488 if (port->serial->type->break_ctl)
489 port->serial->type->break_ctl(tty, break_state);
490 return 0;
491}
492
493static int serial_proc_show(struct seq_file *m, void *v)
494{
495 struct usb_serial *serial;
496 int i;
497 char tmp[40];
498
499 dbg("%s", __func__);
500 seq_puts(m, "usbserinfo:1.0 driver:2.0\n");
501 for (i = 0; i < SERIAL_TTY_MINORS; ++i) {
502 serial = usb_serial_get_by_index(i);
503 if (serial == NULL)
504 continue;
505
506 seq_printf(m, "%d:", i);
507 if (serial->type->driver.owner)
508 seq_printf(m, " module:%s",
509 module_name(serial->type->driver.owner));
510 seq_printf(m, " name:\"%s\"",
511 serial->type->description);
512 seq_printf(m, " vendor:%04x product:%04x",
513 le16_to_cpu(serial->dev->descriptor.idVendor),
514 le16_to_cpu(serial->dev->descriptor.idProduct));
515 seq_printf(m, " num_ports:%d", serial->num_ports);
516 seq_printf(m, " port:%d", i - serial->minor + 1);
517 usb_make_path(serial->dev, tmp, sizeof(tmp));
518 seq_printf(m, " path:%s", tmp);
519
520 seq_putc(m, '\n');
521 usb_serial_put(serial);
522 mutex_unlock(&serial->disc_mutex);
523 }
524 return 0;
525}
526
527static int serial_proc_open(struct inode *inode, struct file *file)
528{
529 return single_open(file, serial_proc_show, NULL);
530}
531
532static const struct file_operations serial_proc_fops = {
533 .owner = THIS_MODULE,
534 .open = serial_proc_open,
535 .read = seq_read,
536 .llseek = seq_lseek,
537 .release = single_release,
538};
539
540static int serial_tiocmget(struct tty_struct *tty, struct file *file)
541{
542 struct usb_serial_port *port = tty->driver_data;
543
544 dbg("%s - port %d", __func__, port->number);
545
546 WARN_ON(!port->port.count);
547 if (port->serial->type->tiocmget)
548 return port->serial->type->tiocmget(tty, file);
549 return -EINVAL;
550}
551
552static int serial_tiocmset(struct tty_struct *tty, struct file *file,
553 unsigned int set, unsigned int clear)
554{
555 struct usb_serial_port *port = tty->driver_data;
556
557 dbg("%s - port %d", __func__, port->number);
558
559 WARN_ON(!port->port.count);
560 if (port->serial->type->tiocmset)
561 return port->serial->type->tiocmset(tty, file, set, clear);
562 return -EINVAL;
563}
564
565
566
567
568
569
570void usb_serial_port_softint(struct usb_serial_port *port)
571{
572 schedule_work(&port->work);
573}
574EXPORT_SYMBOL_GPL(usb_serial_port_softint);
575
576static void usb_serial_port_work(struct work_struct *work)
577{
578 struct usb_serial_port *port =
579 container_of(work, struct usb_serial_port, work);
580 struct tty_struct *tty;
581
582 dbg("%s - port %d", __func__, port->number);
583
584 tty = tty_port_tty_get(&port->port);
585 if (!tty)
586 return;
587
588 tty_wakeup(tty);
589 tty_kref_put(tty);
590}
591
592static void kill_traffic(struct usb_serial_port *port)
593{
594 usb_kill_urb(port->read_urb);
595 usb_kill_urb(port->write_urb);
596
597
598
599
600
601
602
603
604
605
606 usb_kill_urb(port->read_urb);
607 usb_kill_urb(port->interrupt_in_urb);
608 usb_kill_urb(port->interrupt_out_urb);
609}
610
611static void port_release(struct device *dev)
612{
613 struct usb_serial_port *port = to_usb_serial_port(dev);
614
615 dbg ("%s - %s", __func__, dev_name(dev));
616
617
618
619
620
621 kill_traffic(port);
622 cancel_work_sync(&port->work);
623
624 usb_free_urb(port->read_urb);
625 usb_free_urb(port->write_urb);
626 usb_free_urb(port->interrupt_in_urb);
627 usb_free_urb(port->interrupt_out_urb);
628 if (!IS_ERR(port->write_fifo) && port->write_fifo)
629 kfifo_free(port->write_fifo);
630 kfree(port->bulk_in_buffer);
631 kfree(port->bulk_out_buffer);
632 kfree(port->interrupt_in_buffer);
633 kfree(port->interrupt_out_buffer);
634 kfree(port);
635}
636
637static struct usb_serial *create_serial(struct usb_device *dev,
638 struct usb_interface *interface,
639 struct usb_serial_driver *driver)
640{
641 struct usb_serial *serial;
642
643 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
644 if (!serial) {
645 dev_err(&dev->dev, "%s - out of memory\n", __func__);
646 return NULL;
647 }
648 serial->dev = usb_get_dev(dev);
649 serial->type = driver;
650 serial->interface = interface;
651 kref_init(&serial->kref);
652 mutex_init(&serial->disc_mutex);
653 serial->minor = SERIAL_TTY_NO_MINOR;
654
655 return serial;
656}
657
658static const struct usb_device_id *match_dynamic_id(struct usb_interface *intf,
659 struct usb_serial_driver *drv)
660{
661 struct usb_dynid *dynid;
662
663 spin_lock(&drv->dynids.lock);
664 list_for_each_entry(dynid, &drv->dynids.list, node) {
665 if (usb_match_one_id(intf, &dynid->id)) {
666 spin_unlock(&drv->dynids.lock);
667 return &dynid->id;
668 }
669 }
670 spin_unlock(&drv->dynids.lock);
671 return NULL;
672}
673
674static const struct usb_device_id *get_iface_id(struct usb_serial_driver *drv,
675 struct usb_interface *intf)
676{
677 const struct usb_device_id *id;
678
679 id = usb_match_id(intf, drv->id_table);
680 if (id) {
681 dbg("static descriptor matches");
682 goto exit;
683 }
684 id = match_dynamic_id(intf, drv);
685 if (id)
686 dbg("dynamic descriptor matches");
687exit:
688 return id;
689}
690
691static struct usb_serial_driver *search_serial_device(
692 struct usb_interface *iface)
693{
694 const struct usb_device_id *id;
695 struct usb_serial_driver *drv;
696
697
698 list_for_each_entry(drv, &usb_serial_driver_list, driver_list) {
699 id = get_iface_id(drv, iface);
700 if (id)
701 return drv;
702 }
703
704 return NULL;
705}
706
707static int serial_carrier_raised(struct tty_port *port)
708{
709 struct usb_serial_port *p = container_of(port, struct usb_serial_port, port);
710 struct usb_serial_driver *drv = p->serial->type;
711 if (drv->carrier_raised)
712 return drv->carrier_raised(p);
713
714 return 1;
715}
716
717static void serial_dtr_rts(struct tty_port *port, int on)
718{
719 struct usb_serial_port *p = container_of(port, struct usb_serial_port, port);
720 struct usb_serial_driver *drv = p->serial->type;
721 if (drv->dtr_rts)
722 drv->dtr_rts(p, on);
723}
724
725static const struct tty_port_operations serial_port_ops = {
726 .carrier_raised = serial_carrier_raised,
727 .dtr_rts = serial_dtr_rts,
728};
729
730int usb_serial_probe(struct usb_interface *interface,
731 const struct usb_device_id *id)
732{
733 struct usb_device *dev = interface_to_usbdev(interface);
734 struct usb_serial *serial = NULL;
735 struct usb_serial_port *port;
736 struct usb_host_interface *iface_desc;
737 struct usb_endpoint_descriptor *endpoint;
738 struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS];
739 struct usb_endpoint_descriptor *interrupt_out_endpoint[MAX_NUM_PORTS];
740 struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS];
741 struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS];
742 struct usb_serial_driver *type = NULL;
743 int retval;
744 unsigned int minor;
745 int buffer_size;
746 int i;
747 int num_interrupt_in = 0;
748 int num_interrupt_out = 0;
749 int num_bulk_in = 0;
750 int num_bulk_out = 0;
751 int num_ports = 0;
752 int max_endpoints;
753
754 lock_kernel();
755 type = search_serial_device(interface);
756 if (!type) {
757 unlock_kernel();
758 dbg("none matched");
759 return -ENODEV;
760 }
761
762 serial = create_serial(dev, interface, type);
763 if (!serial) {
764 unlock_kernel();
765 dev_err(&interface->dev, "%s - out of memory\n", __func__);
766 return -ENOMEM;
767 }
768
769
770 if (type->probe) {
771 const struct usb_device_id *id;
772
773 if (!try_module_get(type->driver.owner)) {
774 unlock_kernel();
775 dev_err(&interface->dev,
776 "module get failed, exiting\n");
777 kfree(serial);
778 return -EIO;
779 }
780
781 id = get_iface_id(type, interface);
782 retval = type->probe(serial, id);
783 module_put(type->driver.owner);
784
785 if (retval) {
786 unlock_kernel();
787 dbg("sub driver rejected device");
788 kfree(serial);
789 return retval;
790 }
791 }
792
793
794
795 iface_desc = interface->cur_altsetting;
796 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
797 endpoint = &iface_desc->endpoint[i].desc;
798
799 if (usb_endpoint_is_bulk_in(endpoint)) {
800
801 dbg("found bulk in on endpoint %d", i);
802 bulk_in_endpoint[num_bulk_in] = endpoint;
803 ++num_bulk_in;
804 }
805
806 if (usb_endpoint_is_bulk_out(endpoint)) {
807
808 dbg("found bulk out on endpoint %d", i);
809 bulk_out_endpoint[num_bulk_out] = endpoint;
810 ++num_bulk_out;
811 }
812
813 if (usb_endpoint_is_int_in(endpoint)) {
814
815 dbg("found interrupt in on endpoint %d", i);
816 interrupt_in_endpoint[num_interrupt_in] = endpoint;
817 ++num_interrupt_in;
818 }
819
820 if (usb_endpoint_is_int_out(endpoint)) {
821
822 dbg("found interrupt out on endpoint %d", i);
823 interrupt_out_endpoint[num_interrupt_out] = endpoint;
824 ++num_interrupt_out;
825 }
826 }
827
828#if defined(CONFIG_USB_SERIAL_PL2303) || defined(CONFIG_USB_SERIAL_PL2303_MODULE)
829
830
831 if (((le16_to_cpu(dev->descriptor.idVendor) == PL2303_VENDOR_ID) &&
832 (le16_to_cpu(dev->descriptor.idProduct) == PL2303_PRODUCT_ID)) ||
833 ((le16_to_cpu(dev->descriptor.idVendor) == ATEN_VENDOR_ID) &&
834 (le16_to_cpu(dev->descriptor.idProduct) == ATEN_PRODUCT_ID)) ||
835 ((le16_to_cpu(dev->descriptor.idVendor) == ALCOR_VENDOR_ID) &&
836 (le16_to_cpu(dev->descriptor.idProduct) == ALCOR_PRODUCT_ID)) ||
837 ((le16_to_cpu(dev->descriptor.idVendor) == SIEMENS_VENDOR_ID) &&
838 (le16_to_cpu(dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_EF81))) {
839 if (interface != dev->actconfig->interface[0]) {
840
841 iface_desc = dev->actconfig->interface[0]->cur_altsetting;
842 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
843 endpoint = &iface_desc->endpoint[i].desc;
844 if (usb_endpoint_is_int_in(endpoint)) {
845
846 dbg("found interrupt in for Prolific device on separate interface");
847 interrupt_in_endpoint[num_interrupt_in] = endpoint;
848 ++num_interrupt_in;
849 }
850 }
851 }
852
853
854
855
856
857 if (num_bulk_in == 0 || num_bulk_out == 0) {
858 unlock_kernel();
859 dev_info(&interface->dev, "PL-2303 hack: descriptors matched but endpoints did not\n");
860 kfree(serial);
861 return -ENODEV;
862 }
863 }
864
865#endif
866
867#ifdef CONFIG_USB_SERIAL_GENERIC
868 if (type == &usb_serial_generic_device) {
869 num_ports = num_bulk_out;
870 if (num_ports == 0) {
871 unlock_kernel();
872 dev_err(&interface->dev,
873 "Generic device with no bulk out, not allowed.\n");
874 kfree(serial);
875 return -EIO;
876 }
877 }
878#endif
879 if (!num_ports) {
880
881 if (type->calc_num_ports) {
882 if (!try_module_get(type->driver.owner)) {
883 unlock_kernel();
884 dev_err(&interface->dev,
885 "module get failed, exiting\n");
886 kfree(serial);
887 return -EIO;
888 }
889 num_ports = type->calc_num_ports(serial);
890 module_put(type->driver.owner);
891 }
892 if (!num_ports)
893 num_ports = type->num_ports;
894 }
895
896 serial->num_ports = num_ports;
897 serial->num_bulk_in = num_bulk_in;
898 serial->num_bulk_out = num_bulk_out;
899 serial->num_interrupt_in = num_interrupt_in;
900 serial->num_interrupt_out = num_interrupt_out;
901
902
903 dev_info(&interface->dev, "%s converter detected\n",
904 type->description);
905
906
907
908
909 max_endpoints = max(num_bulk_in, num_bulk_out);
910 max_endpoints = max(max_endpoints, num_interrupt_in);
911 max_endpoints = max(max_endpoints, num_interrupt_out);
912 max_endpoints = max(max_endpoints, (int)serial->num_ports);
913 serial->num_port_pointers = max_endpoints;
914 unlock_kernel();
915
916 dbg("%s - setting up %d port structures for this device",
917 __func__, max_endpoints);
918 for (i = 0; i < max_endpoints; ++i) {
919 port = kzalloc(sizeof(struct usb_serial_port), GFP_KERNEL);
920 if (!port)
921 goto probe_error;
922 tty_port_init(&port->port);
923 port->port.ops = &serial_port_ops;
924 port->serial = serial;
925 spin_lock_init(&port->lock);
926 mutex_init(&port->mutex);
927 INIT_WORK(&port->work, usb_serial_port_work);
928 serial->port[i] = port;
929 port->dev.parent = &interface->dev;
930 port->dev.driver = NULL;
931 port->dev.bus = &usb_serial_bus_type;
932 port->dev.release = &port_release;
933 device_initialize(&port->dev);
934 }
935
936
937 for (i = 0; i < num_bulk_in; ++i) {
938 endpoint = bulk_in_endpoint[i];
939 port = serial->port[i];
940 port->read_urb = usb_alloc_urb(0, GFP_KERNEL);
941 if (!port->read_urb) {
942 dev_err(&interface->dev, "No free urbs available\n");
943 goto probe_error;
944 }
945 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
946 port->bulk_in_size = buffer_size;
947 port->bulk_in_endpointAddress = endpoint->bEndpointAddress;
948 port->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
949 if (!port->bulk_in_buffer) {
950 dev_err(&interface->dev,
951 "Couldn't allocate bulk_in_buffer\n");
952 goto probe_error;
953 }
954 usb_fill_bulk_urb(port->read_urb, dev,
955 usb_rcvbulkpipe(dev,
956 endpoint->bEndpointAddress),
957 port->bulk_in_buffer, buffer_size,
958 serial->type->read_bulk_callback, port);
959 }
960
961 for (i = 0; i < num_bulk_out; ++i) {
962 endpoint = bulk_out_endpoint[i];
963 port = serial->port[i];
964 port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
965 if (!port->write_urb) {
966 dev_err(&interface->dev, "No free urbs available\n");
967 goto probe_error;
968 }
969 port->write_fifo = kfifo_alloc(PAGE_SIZE, GFP_KERNEL,
970 &port->lock);
971 if (IS_ERR(port->write_fifo))
972 goto probe_error;
973 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
974 port->bulk_out_size = buffer_size;
975 port->bulk_out_endpointAddress = endpoint->bEndpointAddress;
976 port->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
977 if (!port->bulk_out_buffer) {
978 dev_err(&interface->dev,
979 "Couldn't allocate bulk_out_buffer\n");
980 goto probe_error;
981 }
982 usb_fill_bulk_urb(port->write_urb, dev,
983 usb_sndbulkpipe(dev,
984 endpoint->bEndpointAddress),
985 port->bulk_out_buffer, buffer_size,
986 serial->type->write_bulk_callback, port);
987 }
988
989 if (serial->type->read_int_callback) {
990 for (i = 0; i < num_interrupt_in; ++i) {
991 endpoint = interrupt_in_endpoint[i];
992 port = serial->port[i];
993 port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL);
994 if (!port->interrupt_in_urb) {
995 dev_err(&interface->dev,
996 "No free urbs available\n");
997 goto probe_error;
998 }
999 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
1000 port->interrupt_in_endpointAddress =
1001 endpoint->bEndpointAddress;
1002 port->interrupt_in_buffer = kmalloc(buffer_size,
1003 GFP_KERNEL);
1004 if (!port->interrupt_in_buffer) {
1005 dev_err(&interface->dev,
1006 "Couldn't allocate interrupt_in_buffer\n");
1007 goto probe_error;
1008 }
1009 usb_fill_int_urb(port->interrupt_in_urb, dev,
1010 usb_rcvintpipe(dev,
1011 endpoint->bEndpointAddress),
1012 port->interrupt_in_buffer, buffer_size,
1013 serial->type->read_int_callback, port,
1014 endpoint->bInterval);
1015 }
1016 } else if (num_interrupt_in) {
1017 dbg("the device claims to support interrupt in transfers, but read_int_callback is not defined");
1018 }
1019
1020 if (serial->type->write_int_callback) {
1021 for (i = 0; i < num_interrupt_out; ++i) {
1022 endpoint = interrupt_out_endpoint[i];
1023 port = serial->port[i];
1024 port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL);
1025 if (!port->interrupt_out_urb) {
1026 dev_err(&interface->dev,
1027 "No free urbs available\n");
1028 goto probe_error;
1029 }
1030 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
1031 port->interrupt_out_size = buffer_size;
1032 port->interrupt_out_endpointAddress =
1033 endpoint->bEndpointAddress;
1034 port->interrupt_out_buffer = kmalloc(buffer_size,
1035 GFP_KERNEL);
1036 if (!port->interrupt_out_buffer) {
1037 dev_err(&interface->dev,
1038 "Couldn't allocate interrupt_out_buffer\n");
1039 goto probe_error;
1040 }
1041 usb_fill_int_urb(port->interrupt_out_urb, dev,
1042 usb_sndintpipe(dev,
1043 endpoint->bEndpointAddress),
1044 port->interrupt_out_buffer, buffer_size,
1045 serial->type->write_int_callback, port,
1046 endpoint->bInterval);
1047 }
1048 } else if (num_interrupt_out) {
1049 dbg("the device claims to support interrupt out transfers, but write_int_callback is not defined");
1050 }
1051
1052
1053 if (type->attach) {
1054 if (!try_module_get(type->driver.owner)) {
1055 dev_err(&interface->dev,
1056 "module get failed, exiting\n");
1057 goto probe_error;
1058 }
1059 retval = type->attach(serial);
1060 module_put(type->driver.owner);
1061 if (retval < 0)
1062 goto probe_error;
1063 serial->attached = 1;
1064 if (retval > 0) {
1065
1066
1067 serial->num_ports = 0;
1068 goto exit;
1069 }
1070 } else {
1071 serial->attached = 1;
1072 }
1073
1074 if (get_free_serial(serial, num_ports, &minor) == NULL) {
1075 dev_err(&interface->dev, "No more free serial devices\n");
1076 goto probe_error;
1077 }
1078 serial->minor = minor;
1079
1080
1081 for (i = 0; i < num_ports; ++i) {
1082 port = serial->port[i];
1083 dev_set_name(&port->dev, "ttyUSB%d", port->number);
1084 dbg ("%s - registering %s", __func__, dev_name(&port->dev));
1085 port->dev_state = PORT_REGISTERING;
1086 retval = device_add(&port->dev);
1087 if (retval) {
1088 dev_err(&port->dev, "Error registering port device, "
1089 "continuing\n");
1090 port->dev_state = PORT_UNREGISTERED;
1091 } else {
1092 port->dev_state = PORT_REGISTERED;
1093 }
1094 }
1095
1096 usb_serial_console_init(debug, minor);
1097
1098exit:
1099
1100 usb_set_intfdata(interface, serial);
1101 return 0;
1102
1103probe_error:
1104 usb_serial_put(serial);
1105 return -EIO;
1106}
1107EXPORT_SYMBOL_GPL(usb_serial_probe);
1108
1109void usb_serial_disconnect(struct usb_interface *interface)
1110{
1111 int i;
1112 struct usb_serial *serial = usb_get_intfdata(interface);
1113 struct device *dev = &interface->dev;
1114 struct usb_serial_port *port;
1115
1116 usb_serial_console_disconnect(serial);
1117 dbg("%s", __func__);
1118
1119 mutex_lock(&serial->disc_mutex);
1120 usb_set_intfdata(interface, NULL);
1121
1122 serial->disconnected = 1;
1123 mutex_unlock(&serial->disc_mutex);
1124
1125 for (i = 0; i < serial->num_ports; ++i) {
1126 port = serial->port[i];
1127 if (port) {
1128 struct tty_struct *tty = tty_port_tty_get(&port->port);
1129 if (tty) {
1130 tty_vhangup(tty);
1131 tty_kref_put(tty);
1132 }
1133 kill_traffic(port);
1134 cancel_work_sync(&port->work);
1135 if (port->dev_state == PORT_REGISTERED) {
1136
1137
1138
1139
1140 if (!port->dev.driver) {
1141 int rc;
1142
1143 port->dev.driver =
1144 &serial->type->driver;
1145 rc = device_bind_driver(&port->dev);
1146 }
1147 port->dev_state = PORT_UNREGISTERING;
1148 device_del(&port->dev);
1149 port->dev_state = PORT_UNREGISTERED;
1150 }
1151 }
1152 }
1153 serial->type->disconnect(serial);
1154
1155
1156 usb_serial_put(serial);
1157 dev_info(dev, "device disconnected\n");
1158}
1159EXPORT_SYMBOL_GPL(usb_serial_disconnect);
1160
1161int usb_serial_suspend(struct usb_interface *intf, pm_message_t message)
1162{
1163 struct usb_serial *serial = usb_get_intfdata(intf);
1164 struct usb_serial_port *port;
1165 int i, r = 0;
1166
1167 serial->suspending = 1;
1168
1169 if (serial->type->suspend) {
1170 r = serial->type->suspend(serial, message);
1171 if (r < 0) {
1172 serial->suspending = 0;
1173 goto err_out;
1174 }
1175 }
1176
1177 for (i = 0; i < serial->num_ports; ++i) {
1178 port = serial->port[i];
1179 if (port)
1180 kill_traffic(port);
1181 }
1182
1183err_out:
1184 return r;
1185}
1186EXPORT_SYMBOL(usb_serial_suspend);
1187
1188int usb_serial_resume(struct usb_interface *intf)
1189{
1190 struct usb_serial *serial = usb_get_intfdata(intf);
1191 int rv;
1192
1193 serial->suspending = 0;
1194 if (serial->type->resume)
1195 rv = serial->type->resume(serial);
1196 else
1197 rv = usb_serial_generic_resume(serial);
1198
1199 return rv;
1200}
1201EXPORT_SYMBOL(usb_serial_resume);
1202
1203static const struct tty_operations serial_ops = {
1204 .open = serial_open,
1205 .close = serial_close,
1206 .write = serial_write,
1207 .hangup = serial_hangup,
1208 .write_room = serial_write_room,
1209 .ioctl = serial_ioctl,
1210 .set_termios = serial_set_termios,
1211 .throttle = serial_throttle,
1212 .unthrottle = serial_unthrottle,
1213 .break_ctl = serial_break,
1214 .chars_in_buffer = serial_chars_in_buffer,
1215 .tiocmget = serial_tiocmget,
1216 .tiocmset = serial_tiocmset,
1217 .cleanup = serial_cleanup,
1218 .install = serial_install,
1219 .proc_fops = &serial_proc_fops,
1220};
1221
1222
1223struct tty_driver *usb_serial_tty_driver;
1224
1225static int __init usb_serial_init(void)
1226{
1227 int i;
1228 int result;
1229
1230 usb_serial_tty_driver = alloc_tty_driver(SERIAL_TTY_MINORS);
1231 if (!usb_serial_tty_driver)
1232 return -ENOMEM;
1233
1234
1235 for (i = 0; i < SERIAL_TTY_MINORS; ++i)
1236 serial_table[i] = NULL;
1237
1238 result = bus_register(&usb_serial_bus_type);
1239 if (result) {
1240 printk(KERN_ERR "usb-serial: %s - registering bus driver "
1241 "failed\n", __func__);
1242 goto exit_bus;
1243 }
1244
1245 usb_serial_tty_driver->owner = THIS_MODULE;
1246 usb_serial_tty_driver->driver_name = "usbserial";
1247 usb_serial_tty_driver->name = "ttyUSB";
1248 usb_serial_tty_driver->major = SERIAL_TTY_MAJOR;
1249 usb_serial_tty_driver->minor_start = 0;
1250 usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
1251 usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL;
1252 usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW |
1253 TTY_DRIVER_DYNAMIC_DEV;
1254 usb_serial_tty_driver->init_termios = tty_std_termios;
1255 usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD
1256 | HUPCL | CLOCAL;
1257 usb_serial_tty_driver->init_termios.c_ispeed = 9600;
1258 usb_serial_tty_driver->init_termios.c_ospeed = 9600;
1259 tty_set_operations(usb_serial_tty_driver, &serial_ops);
1260 result = tty_register_driver(usb_serial_tty_driver);
1261 if (result) {
1262 printk(KERN_ERR "usb-serial: %s - tty_register_driver failed\n",
1263 __func__);
1264 goto exit_reg_driver;
1265 }
1266
1267
1268 result = usb_register(&usb_serial_driver);
1269 if (result < 0) {
1270 printk(KERN_ERR "usb-serial: %s - usb_register failed\n",
1271 __func__);
1272 goto exit_tty;
1273 }
1274
1275
1276 result = usb_serial_generic_register(debug);
1277 if (result < 0) {
1278 printk(KERN_ERR "usb-serial: %s - registering generic "
1279 "driver failed\n", __func__);
1280 goto exit_generic;
1281 }
1282
1283 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1284
1285 return result;
1286
1287exit_generic:
1288 usb_deregister(&usb_serial_driver);
1289
1290exit_tty:
1291 tty_unregister_driver(usb_serial_tty_driver);
1292
1293exit_reg_driver:
1294 bus_unregister(&usb_serial_bus_type);
1295
1296exit_bus:
1297 printk(KERN_ERR "usb-serial: %s - returning with error %d\n",
1298 __func__, result);
1299 put_tty_driver(usb_serial_tty_driver);
1300 return result;
1301}
1302
1303
1304static void __exit usb_serial_exit(void)
1305{
1306 usb_serial_console_exit();
1307
1308 usb_serial_generic_deregister();
1309
1310 usb_deregister(&usb_serial_driver);
1311 tty_unregister_driver(usb_serial_tty_driver);
1312 put_tty_driver(usb_serial_tty_driver);
1313 bus_unregister(&usb_serial_bus_type);
1314}
1315
1316
1317module_init(usb_serial_init);
1318module_exit(usb_serial_exit);
1319
1320#define set_to_generic_if_null(type, function) \
1321 do { \
1322 if (!type->function) { \
1323 type->function = usb_serial_generic_##function; \
1324 dbg("Had to override the " #function \
1325 " usb serial operation with the generic one.");\
1326 } \
1327 } while (0)
1328
1329static void fixup_generic(struct usb_serial_driver *device)
1330{
1331 set_to_generic_if_null(device, open);
1332 set_to_generic_if_null(device, write);
1333 set_to_generic_if_null(device, close);
1334 set_to_generic_if_null(device, write_room);
1335 set_to_generic_if_null(device, chars_in_buffer);
1336 set_to_generic_if_null(device, read_bulk_callback);
1337 set_to_generic_if_null(device, write_bulk_callback);
1338 set_to_generic_if_null(device, disconnect);
1339 set_to_generic_if_null(device, release);
1340}
1341
1342int usb_serial_register(struct usb_serial_driver *driver)
1343{
1344
1345 int retval;
1346
1347 if (usb_disabled())
1348 return -ENODEV;
1349
1350 fixup_generic(driver);
1351
1352 if (!driver->description)
1353 driver->description = driver->driver.name;
1354
1355
1356 list_add(&driver->driver_list, &usb_serial_driver_list);
1357
1358 retval = usb_serial_bus_register(driver);
1359 if (retval) {
1360 printk(KERN_ERR "usb-serial: problem %d when registering "
1361 "driver %s\n", retval, driver->description);
1362 list_del(&driver->driver_list);
1363 } else
1364 printk(KERN_INFO "USB Serial support registered for %s\n",
1365 driver->description);
1366
1367 return retval;
1368}
1369EXPORT_SYMBOL_GPL(usb_serial_register);
1370
1371
1372void usb_serial_deregister(struct usb_serial_driver *device)
1373{
1374
1375 printk(KERN_INFO "USB Serial deregistering driver %s\n",
1376 device->description);
1377 list_del(&device->driver_list);
1378 usb_serial_bus_deregister(device);
1379}
1380EXPORT_SYMBOL_GPL(usb_serial_deregister);
1381
1382
1383MODULE_AUTHOR(DRIVER_AUTHOR);
1384MODULE_DESCRIPTION(DRIVER_DESC);
1385MODULE_LICENSE("GPL");
1386
1387module_param(debug, bool, S_IRUGO | S_IWUSR);
1388MODULE_PARM_DESC(debug, "Debug enabled or not");
1389