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2
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5
6
7#include <linux/errno.h>
8#include <linux/init.h>
9#include <linux/slab.h>
10#include <linux/tty.h>
11#include <linux/tty_driver.h>
12#include <linux/tty_flip.h>
13#include <linux/module.h>
14#include <linux/serial.h>
15#include <linux/usb.h>
16#include <linux/usb/serial.h>
17#include <linux/uaccess.h>
18
19static int debug;
20
21
22#define DRIVER_VERSION "v2.14"
23#define DRIVER_AUTHOR "Tim Gobeli, Quatech, Inc"
24#define DRIVER_DESC "Quatech USB to Serial Driver"
25
26#define USB_VENDOR_ID_QUATECH 0x061d
27#define QUATECH_SSU100 0xC020
28#define QUATECH_SSU200 0xC030
29#define QUATECH_DSU100 0xC040
30#define QUATECH_DSU200 0xC050
31#define QUATECH_QSU100 0xC060
32#define QUATECH_QSU200 0xC070
33#define QUATECH_ESU100A 0xC080
34#define QUATECH_ESU100B 0xC081
35#define QUATECH_ESU200A 0xC0A0
36#define QUATECH_ESU200B 0xC0A1
37#define QUATECH_HSU100A 0xC090
38#define QUATECH_HSU100B 0xC091
39#define QUATECH_HSU100C 0xC092
40#define QUATECH_HSU100D 0xC093
41#define QUATECH_HSU200A 0xC0B0
42#define QUATECH_HSU200B 0xC0B1
43#define QUATECH_HSU200C 0xC0B2
44#define QUATECH_HSU200D 0xC0B3
45#define QUATECH_SSU100_2 0xC120
46#define QUATECH_DSU100_2 0xC140
47#define QUATECH_DSU400_2 0xC150
48#define QUATECH_QSU100_2 0xC160
49#define QUATECH_QSU400_2 0xC170
50#define QUATECH_ESU400_2 0xC180
51#define QUATECH_ESU100_2 0xC1A0
52
53#define QT_SET_GET_DEVICE 0xc2
54#define QT_OPEN_CLOSE_CHANNEL 0xca
55#define QT_GET_SET_PREBUF_TRIG_LVL 0xcc
56#define QT_SET_ATF 0xcd
57#define QT_GET_SET_REGISTER 0xc0
58#define QT_GET_SET_UART 0xc1
59#define QT_HW_FLOW_CONTROL_MASK 0xc5
60#define QT_SW_FLOW_CONTROL_MASK 0xc6
61#define QT_SW_FLOW_CONTROL_DISABLE 0xc7
62#define QT_BREAK_CONTROL 0xc8
63
64#define USBD_TRANSFER_DIRECTION_IN 0xc0
65#define USBD_TRANSFER_DIRECTION_OUT 0x40
66
67#define MAX_BAUD_RATE 460800
68#define MAX_BAUD_REMAINDER 4608
69
70#define DIV_LATCH_LS 0x00
71#define XMT_HOLD_REGISTER 0x00
72#define XVR_BUFFER_REGISTER 0x00
73#define DIV_LATCH_MS 0x01
74#define FIFO_CONTROL_REGISTER 0x02
75#define LINE_CONTROL_REGISTER 0x03
76#define MODEM_CONTROL_REGISTER 0x04
77#define LINE_STATUS_REGISTER 0x05
78#define MODEM_STATUS_REGISTER 0x06
79
80#define SERIAL_MCR_DTR 0x01
81#define SERIAL_MCR_RTS 0x02
82#define SERIAL_MCR_LOOP 0x10
83
84#define SERIAL_MSR_CTS 0x10
85#define SERIAL_MSR_CD 0x80
86#define SERIAL_MSR_RI 0x40
87#define SERIAL_MSR_DSR 0x20
88#define SERIAL_MSR_MASK 0xf0
89
90#define SERIAL_8_DATA 0x03
91#define SERIAL_7_DATA 0x02
92#define SERIAL_6_DATA 0x01
93#define SERIAL_5_DATA 0x00
94
95#define SERIAL_ODD_PARITY 0X08
96#define SERIAL_EVEN_PARITY 0X18
97#define SERIAL_TWO_STOPB 0x04
98#define SERIAL_ONE_STOPB 0x00
99
100#define DEFAULT_DIVISOR 0x30
101#define DEFAULT_LCR SERIAL_8_DATA
102
103#define FULLPWRBIT 0x00000080
104#define NEXT_BOARD_POWER_BIT 0x00000004
105
106#define SERIAL_LSR_OE 0x02
107#define SERIAL_LSR_PE 0x04
108#define SERIAL_LSR_FE 0x08
109#define SERIAL_LSR_BI 0x10
110
111#define SERIAL_MSR_CTS 0x10
112#define SERIAL_MSR_CD 0x80
113#define SERIAL_MSR_RI 0x40
114#define SERIAL_MSR_DSR 0x20
115#define SERIAL_MSR_MASK 0xf0
116
117#define PREFUFF_LEVEL_CONSERVATIVE 128
118#define ATC_DISABLED 0x0
119
120#define RR_BITS 0x03
121#define DUPMODE_BITS 0xc0
122#define CLKS_X4 0x02
123
124#define LOOPMODE_BITS 0x41
125#define ALL_LOOPBACK 0x01
126#define MODEM_CTRL 0x40
127#define RS232_MODE 0x00
128
129static const struct usb_device_id serqt_id_table[] = {
130 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU100)},
131 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU200)},
132 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU100)},
133 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU200)},
134 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU100)},
135 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU200)},
136 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU100A)},
137 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU100B)},
138 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU200A)},
139 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU200B)},
140 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU100A)},
141 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU100B)},
142 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU100C)},
143 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU100D)},
144 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU200A)},
145 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU200B)},
146 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU200C)},
147 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU200D)},
148 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU100_2)},
149 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU100_2)},
150 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU400_2)},
151 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU100_2)},
152 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU400_2)},
153 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU400_2)},
154 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU100_2)},
155 {}
156};
157
158MODULE_DEVICE_TABLE(usb, serqt_id_table);
159
160struct qt_get_device_data {
161 __u8 porta;
162 __u8 portb;
163 __u8 portc;
164};
165
166struct qt_open_channel_data {
167 __u8 line_status;
168 __u8 modem_status;
169};
170
171struct quatech_port {
172 int port_num;
173 struct urb *write_urb;
174 struct urb *read_urb;
175 struct urb *int_urb;
176
177 __u8 shadowLCR;
178 __u8 shadowMCR;
179 __u8 shadowMSR;
180 __u8 shadowLSR;
181 char open_ports;
182
183
184 wait_queue_head_t msr_wait;
185 char prev_status, diff_status;
186
187 wait_queue_head_t wait;
188
189 struct async_icount icount;
190
191 struct usb_serial_port *port;
192 struct qt_get_device_data DeviceData;
193 spinlock_t lock;
194 bool read_urb_busy;
195 int RxHolding;
196 int ReadBulkStopped;
197 char closePending;
198};
199
200static struct usb_driver serqt_usb_driver = {
201 .name = "quatech-usb-serial",
202 .probe = usb_serial_probe,
203 .disconnect = usb_serial_disconnect,
204 .id_table = serqt_id_table,
205 .no_dynamic_id = 1,
206};
207
208static int port_paranoia_check(struct usb_serial_port *port,
209 const char *function)
210{
211 if (!port) {
212 dbg("%s - port == NULL", function);
213 return -1;
214 }
215 if (!port->serial) {
216 dbg("%s - port->serial == NULL\n", function);
217 return -1;
218 }
219
220 return 0;
221}
222
223static int serial_paranoia_check(struct usb_serial *serial,
224 const char *function)
225{
226 if (!serial) {
227 dbg("%s - serial == NULL\n", function);
228 return -1;
229 }
230
231 if (!serial->type) {
232 dbg("%s - serial->type == NULL!", function);
233 return -1;
234 }
235
236 return 0;
237}
238
239static inline struct quatech_port *qt_get_port_private(struct usb_serial_port
240 *port)
241{
242 return (struct quatech_port *)usb_get_serial_port_data(port);
243}
244
245static inline void qt_set_port_private(struct usb_serial_port *port,
246 struct quatech_port *data)
247{
248 usb_set_serial_port_data(port, (void *)data);
249}
250
251static struct usb_serial *get_usb_serial(struct usb_serial_port *port,
252 const char *function)
253{
254
255 if (!port ||
256 port_paranoia_check(port, function) ||
257 serial_paranoia_check(port->serial, function)) {
258
259
260
261
262 return NULL;
263 }
264
265 return port->serial;
266}
267
268static void ProcessLineStatus(struct quatech_port *qt_port,
269 unsigned char line_status)
270{
271
272 qt_port->shadowLSR =
273 line_status & (SERIAL_LSR_OE | SERIAL_LSR_PE | SERIAL_LSR_FE |
274 SERIAL_LSR_BI);
275 return;
276}
277
278static void ProcessModemStatus(struct quatech_port *qt_port,
279 unsigned char modem_status)
280{
281
282 qt_port->shadowMSR = modem_status;
283 wake_up_interruptible(&qt_port->wait);
284 return;
285}
286
287static void ProcessRxChar(struct tty_struct *tty, struct usb_serial_port *port,
288 unsigned char data)
289{
290 struct urb *urb = port->read_urb;
291 if (urb->actual_length)
292 tty_insert_flip_char(tty, data, TTY_NORMAL);
293}
294
295static void qt_write_bulk_callback(struct urb *urb)
296{
297 struct tty_struct *tty;
298 int status;
299 struct quatech_port *quatech_port;
300
301 status = urb->status;
302
303 if (status) {
304 dbg("nonzero write bulk status received:%d\n", status);
305 return;
306 }
307
308 quatech_port = urb->context;
309
310 dbg("%s - port %d\n", __func__, quatech_port->port_num);
311
312 tty = tty_port_tty_get(&quatech_port->port->port);
313
314 if (tty)
315 tty_wakeup(tty);
316 tty_kref_put(tty);
317}
318
319static void qt_interrupt_callback(struct urb *urb)
320{
321
322}
323
324static void qt_read_bulk_callback(struct urb *urb)
325{
326
327 struct usb_serial_port *port = urb->context;
328 struct usb_serial *serial = get_usb_serial(port, __func__);
329 struct quatech_port *qt_port = qt_get_port_private(port);
330 unsigned char *data;
331 struct tty_struct *tty;
332 unsigned int index;
333 unsigned int RxCount;
334 int i, result;
335 int flag, flag_data;
336
337 if (urb->status) {
338 qt_port->ReadBulkStopped = 1;
339 dbg("%s - nonzero write bulk status received: %d\n",
340 __func__, urb->status);
341 return;
342 }
343
344 tty = tty_port_tty_get(&port->port);
345 if (!tty) {
346 dbg("%s - bad tty pointer - exiting", __func__);
347 return;
348 }
349
350 data = urb->transfer_buffer;
351
352 RxCount = urb->actual_length;
353
354
355 index = tty->index - serial->minor;
356
357 dbg("%s - port %d\n", __func__, port->number);
358 dbg("%s - port->RxHolding = %d\n", __func__, qt_port->RxHolding);
359
360 if (port_paranoia_check(port, __func__) != 0) {
361 dbg("%s - port_paranoia_check, exiting\n", __func__);
362 qt_port->ReadBulkStopped = 1;
363 goto exit;
364 }
365
366 if (!serial) {
367 dbg("%s - bad serial pointer, exiting\n", __func__);
368 goto exit;
369 }
370 if (qt_port->closePending == 1) {
371
372 dbg("%s - (qt_port->closepending == 1\n", __func__);
373 qt_port->ReadBulkStopped = 1;
374 goto exit;
375 }
376
377
378
379
380
381
382 if (qt_port->RxHolding == 1) {
383 qt_port->ReadBulkStopped = 1;
384 goto exit;
385 }
386
387 if (urb->status) {
388 qt_port->ReadBulkStopped = 1;
389
390 dbg("%s - nonzero read bulk status received: %d\n",
391 __func__, urb->status);
392 goto exit;
393 }
394
395 if (tty && RxCount) {
396 flag_data = 0;
397 for (i = 0; i < RxCount; ++i) {
398
399 if ((i <= (RxCount - 3)) && (data[i] == 0x1b)
400 && (data[i + 1] == 0x1b)) {
401 flag = 0;
402 switch (data[i + 2]) {
403 case 0x00:
404
405 if (i > (RxCount - 4)) {
406 dbg("Illegal escape seuences in received data\n");
407 break;
408 }
409 ProcessLineStatus(qt_port, data[i + 3]);
410 i += 3;
411 flag = 1;
412 break;
413
414 case 0x01:
415
416 dbg("Modem status status.\n");
417 if (i > (RxCount - 4)) {
418 dbg("Illegal escape sequences in received data\n");
419 break;
420 }
421 ProcessModemStatus(qt_port,
422 data[i + 3]);
423 i += 3;
424 flag = 1;
425 break;
426 case 0xff:
427 dbg("No status sequence.\n");
428
429 if (tty) {
430 ProcessRxChar(tty, port, data[i]);
431 ProcessRxChar(tty, port, data[i + 1]);
432 }
433 i += 2;
434 break;
435 }
436 if (flag == 1)
437 continue;
438 }
439
440 if (tty && urb->actual_length)
441 tty_insert_flip_char(tty, data[i], TTY_NORMAL);
442
443 }
444 tty_flip_buffer_push(tty);
445 }
446
447
448 usb_fill_bulk_urb(port->read_urb, serial->dev,
449 usb_rcvbulkpipe(serial->dev,
450 port->bulk_in_endpointAddress),
451 port->read_urb->transfer_buffer,
452 port->read_urb->transfer_buffer_length,
453 qt_read_bulk_callback, port);
454 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
455 if (result)
456 dbg("%s - failed resubmitting read urb, error %d",
457 __func__, result);
458 else {
459 if (tty && RxCount) {
460 tty_flip_buffer_push(tty);
461 tty_schedule_flip(tty);
462 }
463 }
464
465 schedule_work(&port->work);
466exit:
467 tty_kref_put(tty);
468}
469
470
471
472
473
474
475
476
477static int qt_get_device(struct usb_serial *serial,
478 struct qt_get_device_data *device_data)
479{
480 int result;
481 unsigned char *transfer_buffer;
482
483 transfer_buffer =
484 kmalloc(sizeof(struct qt_get_device_data), GFP_KERNEL);
485 if (!transfer_buffer)
486 return -ENOMEM;
487
488 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
489 QT_SET_GET_DEVICE, 0xc0, 0, 0,
490 transfer_buffer,
491 sizeof(struct qt_get_device_data), 300);
492 if (result > 0)
493 memcpy(device_data, transfer_buffer,
494 sizeof(struct qt_get_device_data));
495 kfree(transfer_buffer);
496
497 return result;
498}
499
500
501
502
503
504static int BoxSetPrebufferLevel(struct usb_serial *serial)
505{
506 int result;
507 __u16 buffer_length;
508
509 buffer_length = PREFUFF_LEVEL_CONSERVATIVE;
510 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
511 QT_GET_SET_PREBUF_TRIG_LVL, 0x40,
512 buffer_length, 0, NULL, 0, 300);
513 return result;
514}
515
516
517
518
519
520static int BoxSetATC(struct usb_serial *serial, __u16 n_Mode)
521{
522 int result;
523 __u16 buffer_length;
524
525 buffer_length = PREFUFF_LEVEL_CONSERVATIVE;
526
527 result =
528 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
529 QT_SET_ATF, 0x40, n_Mode, 0, NULL, 0, 300);
530
531 return result;
532}
533
534
535
536
537
538
539
540static int qt_set_device(struct usb_serial *serial,
541 struct qt_get_device_data *device_data)
542{
543 int result;
544 __u16 length;
545 __u16 PortSettings;
546
547 PortSettings = ((__u16) (device_data->portb));
548 PortSettings = (PortSettings << 8);
549 PortSettings += ((__u16) (device_data->porta));
550
551 length = sizeof(struct qt_get_device_data);
552 dbg("%s - PortSettings = 0x%x\n", __func__, PortSettings);
553
554 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
555 QT_SET_GET_DEVICE, 0x40, PortSettings,
556 0, NULL, 0, 300);
557 return result;
558}
559
560static int qt_open_channel(struct usb_serial *serial, __u16 Uart_Number,
561 struct qt_open_channel_data *pDeviceData)
562{
563 int result;
564
565 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
566 QT_OPEN_CLOSE_CHANNEL,
567 USBD_TRANSFER_DIRECTION_IN, 1, Uart_Number,
568 pDeviceData,
569 sizeof(struct qt_open_channel_data), 300);
570
571 return result;
572
573}
574
575static int qt_close_channel(struct usb_serial *serial, __u16 Uart_Number)
576{
577 int result;
578
579 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
580 QT_OPEN_CLOSE_CHANNEL,
581 USBD_TRANSFER_DIRECTION_OUT, 0, Uart_Number,
582 NULL, 0, 300);
583
584 return result;
585
586}
587
588
589
590
591
592
593static int BoxGetRegister(struct usb_serial *serial, unsigned short Uart_Number,
594 unsigned short Register_Num, __u8 *pValue)
595{
596 int result;
597 __u16 current_length;
598
599 current_length = sizeof(struct qt_get_device_data);
600
601 result =
602 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
603 QT_GET_SET_REGISTER, 0xC0, Register_Num,
604 Uart_Number, (void *)pValue, sizeof(*pValue), 300);
605
606 return result;
607}
608
609
610
611
612
613
614static int BoxSetRegister(struct usb_serial *serial, unsigned short Uart_Number,
615 unsigned short Register_Num, unsigned short Value)
616{
617 int result;
618 unsigned short RegAndByte;
619
620 RegAndByte = Value;
621 RegAndByte = RegAndByte << 8;
622 RegAndByte = RegAndByte + Register_Num;
623
624
625
626
627
628
629
630 result =
631 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
632 QT_GET_SET_REGISTER, 0x40, RegAndByte, Uart_Number,
633 NULL, 0, 300);
634
635 return result;
636}
637
638
639
640
641
642
643static int qt_setuart(struct usb_serial *serial, unsigned short Uart_Number,
644 unsigned short default_divisor, unsigned char default_LCR)
645{
646 int result;
647 unsigned short UartNumandLCR;
648
649 UartNumandLCR = (default_LCR << 8) + Uart_Number;
650
651 result =
652 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
653 QT_GET_SET_UART, 0x40, default_divisor,
654 UartNumandLCR, NULL, 0, 300);
655
656 return result;
657}
658
659static int BoxSetHW_FlowCtrl(struct usb_serial *serial, unsigned int index,
660 int bSet)
661{
662 __u8 mcr = 0;
663 __u8 msr = 0, MOUT_Value = 0;
664 unsigned int status;
665
666 if (bSet == 1) {
667
668 mcr = SERIAL_MCR_RTS;
669 }
670 else {
671
672 mcr = 0;
673
674 }
675 MOUT_Value = mcr << 8;
676
677 if (bSet == 1) {
678
679
680 msr = SERIAL_MSR_CTS;
681 } else {
682
683 msr = 0;
684 }
685 MOUT_Value |= msr;
686
687 status =
688 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
689 QT_HW_FLOW_CONTROL_MASK, 0x40, MOUT_Value,
690 index, NULL, 0, 300);
691 return status;
692
693}
694
695static int BoxSetSW_FlowCtrl(struct usb_serial *serial, __u16 index,
696 unsigned char stop_char, unsigned char start_char)
697{
698 __u16 nSWflowout;
699 int result;
700
701 nSWflowout = start_char << 8;
702 nSWflowout = (unsigned short)stop_char;
703
704 result =
705 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
706 QT_SW_FLOW_CONTROL_MASK, 0x40, nSWflowout,
707 index, NULL, 0, 300);
708 return result;
709
710}
711
712static int BoxDisable_SW_FlowCtrl(struct usb_serial *serial, __u16 index)
713{
714 int result;
715
716 result =
717 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
718 QT_SW_FLOW_CONTROL_DISABLE, 0x40, 0, index,
719 NULL, 0, 300);
720 return result;
721
722}
723
724static int qt_startup(struct usb_serial *serial)
725{
726 struct usb_serial_port *port;
727 struct quatech_port *qt_port;
728 struct qt_get_device_data DeviceData;
729 int i;
730 int status;
731
732 dbg("enterting %s", __func__);
733
734
735 for (i = 0; i < serial->num_ports; i++) {
736 port = serial->port[i];
737 qt_port = kzalloc(sizeof(*qt_port), GFP_KERNEL);
738 if (!qt_port) {
739 dbg("%s: kmalloc for quatech_port (%d) failed!.",
740 __func__, i);
741 for (--i; i >= 0; i--) {
742 port = serial->port[i];
743 kfree(usb_get_serial_port_data(port));
744 usb_set_serial_port_data(port, NULL);
745 }
746 return -ENOMEM;
747 }
748 spin_lock_init(&qt_port->lock);
749
750 usb_set_serial_port_data(port, qt_port);
751
752 }
753
754 status = qt_get_device(serial, &DeviceData);
755 if (status < 0) {
756 dbg(__FILE__ "box_get_device failed");
757 goto startup_error;
758 }
759
760 dbg(__FILE__ "DeviceData.portb = 0x%x", DeviceData.portb);
761
762 DeviceData.portb &= ~FULLPWRBIT;
763 dbg(__FILE__ "Changing DeviceData.portb to 0x%x", DeviceData.portb);
764
765 status = qt_set_device(serial, &DeviceData);
766 if (status < 0) {
767 dbg(__FILE__ "qt_set_device failed\n");
768 goto startup_error;
769 }
770
771 status = qt_get_device(serial, &DeviceData);
772 if (status < 0) {
773 dbg(__FILE__ "qt_get_device failed");
774 goto startup_error;
775 }
776
777 switch (serial->dev->descriptor.idProduct) {
778 case QUATECH_SSU100:
779 case QUATECH_DSU100:
780 case QUATECH_QSU100:
781 case QUATECH_ESU100A:
782 case QUATECH_ESU100B:
783 case QUATECH_HSU100A:
784 case QUATECH_HSU100B:
785 case QUATECH_HSU100C:
786 case QUATECH_HSU100D:
787 DeviceData.porta &= ~(RR_BITS | DUPMODE_BITS);
788 DeviceData.porta |= CLKS_X4;
789 DeviceData.portb &= ~(LOOPMODE_BITS);
790 DeviceData.portb |= RS232_MODE;
791 break;
792
793 case QUATECH_SSU200:
794 case QUATECH_DSU200:
795 case QUATECH_QSU200:
796 case QUATECH_ESU200A:
797 case QUATECH_ESU200B:
798 case QUATECH_HSU200A:
799 case QUATECH_HSU200B:
800 case QUATECH_HSU200C:
801 case QUATECH_HSU200D:
802 DeviceData.porta &= ~(RR_BITS | DUPMODE_BITS);
803 DeviceData.porta |= CLKS_X4;
804 DeviceData.portb &= ~(LOOPMODE_BITS);
805 DeviceData.portb |= ALL_LOOPBACK;
806 break;
807 default:
808 DeviceData.porta &= ~(RR_BITS | DUPMODE_BITS);
809 DeviceData.porta |= CLKS_X4;
810 DeviceData.portb &= ~(LOOPMODE_BITS);
811 DeviceData.portb |= RS232_MODE;
812 break;
813
814 }
815
816 status = BoxSetPrebufferLevel(serial);
817 if (status < 0) {
818 dbg(__FILE__ "BoxSetPrebufferLevel failed\n");
819 goto startup_error;
820 }
821
822 status = BoxSetATC(serial, ATC_DISABLED);
823 if (status < 0) {
824 dbg(__FILE__ "BoxSetATC failed\n");
825 goto startup_error;
826 }
827
828 dbg(__FILE__ "DeviceData.portb = 0x%x", DeviceData.portb);
829
830 DeviceData.portb |= NEXT_BOARD_POWER_BIT;
831 dbg(__FILE__ "Changing DeviceData.portb to 0x%x", DeviceData.portb);
832
833 status = qt_set_device(serial, &DeviceData);
834 if (status < 0) {
835 dbg(__FILE__ "qt_set_device failed\n");
836 goto startup_error;
837 }
838
839 dbg("Exit Success %s\n", __func__);
840
841 return 0;
842
843startup_error:
844 for (i = 0; i < serial->num_ports; i++) {
845 port = serial->port[i];
846 qt_port = qt_get_port_private(port);
847 kfree(qt_port);
848 usb_set_serial_port_data(port, NULL);
849 }
850
851 dbg("Exit fail %s\n", __func__);
852
853 return -EIO;
854}
855
856static void qt_release(struct usb_serial *serial)
857{
858 struct usb_serial_port *port;
859 struct quatech_port *qt_port;
860 int i;
861
862 dbg("enterting %s", __func__);
863
864 for (i = 0; i < serial->num_ports; i++) {
865 port = serial->port[i];
866 if (!port)
867 continue;
868
869 qt_port = usb_get_serial_port_data(port);
870 kfree(qt_port);
871 usb_set_serial_port_data(port, NULL);
872 }
873
874}
875
876static int qt_open(struct tty_struct *tty,
877 struct usb_serial_port *port)
878{
879 struct usb_serial *serial;
880 struct quatech_port *quatech_port;
881 struct quatech_port *port0;
882 struct qt_open_channel_data ChannelData;
883
884 int result;
885
886 if (port_paranoia_check(port, __func__))
887 return -ENODEV;
888
889 dbg("%s - port %d\n", __func__, port->number);
890
891 serial = port->serial;
892
893 if (serial_paranoia_check(serial, __func__))
894 return -ENODEV;
895
896 quatech_port = qt_get_port_private(port);
897 port0 = qt_get_port_private(serial->port[0]);
898
899 if (quatech_port == NULL || port0 == NULL)
900 return -ENODEV;
901
902 usb_clear_halt(serial->dev, port->write_urb->pipe);
903 usb_clear_halt(serial->dev, port->read_urb->pipe);
904 port0->open_ports++;
905
906 result = qt_get_device(serial, &port0->DeviceData);
907
908
909 result = qt_open_channel(serial, port->number, &ChannelData);
910 if (result < 0) {
911 dbg(__FILE__ "qt_open_channel failed\n");
912 return result;
913 }
914 dbg(__FILE__ "qt_open_channel completed.\n");
915
916
917 quatech_port->shadowLSR = ChannelData.line_status &
918 (SERIAL_LSR_OE | SERIAL_LSR_PE | SERIAL_LSR_FE | SERIAL_LSR_BI);
919
920 quatech_port->shadowMSR = ChannelData.modem_status &
921 (SERIAL_MSR_CTS | SERIAL_MSR_DSR | SERIAL_MSR_RI | SERIAL_MSR_CD);
922
923
924 result = qt_setuart(serial, port->number, DEFAULT_DIVISOR, DEFAULT_LCR);
925 if (result < 0) {
926 dbg(__FILE__ "qt_setuart failed\n");
927 return result;
928 }
929 dbg(__FILE__ "qt_setuart completed.\n");
930
931
932
933
934
935
936
937
938
939 if (port0->open_ports == 1) {
940 if (serial->port[0]->interrupt_in_buffer == NULL) {
941
942 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
943 serial->dev,
944 usb_rcvintpipe(serial->dev,
945 serial->port[0]->interrupt_in_endpointAddress),
946 serial->port[0]->interrupt_in_buffer,
947 serial->port[0]->
948 interrupt_in_urb->transfer_buffer_length,
949 qt_interrupt_callback, serial,
950 serial->port[0]->
951 interrupt_in_urb->interval);
952
953 result =
954 usb_submit_urb(serial->port[0]->interrupt_in_urb,
955 GFP_KERNEL);
956 if (result) {
957 dev_err(&port->dev,
958 "%s - Error %d submitting "
959 "interrupt urb\n", __func__, result);
960 }
961
962 }
963
964 }
965
966 dbg("port number is %d\n", port->number);
967 dbg("serial number is %d\n", port->serial->minor);
968 dbg("Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
969 dbg("BulkOut endpoint is %d\n", port->bulk_out_endpointAddress);
970 dbg("Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress);
971 dbg("port's number in the device is %d\n", quatech_port->port_num);
972 quatech_port->read_urb = port->read_urb;
973
974
975
976 usb_fill_bulk_urb(quatech_port->read_urb,
977 serial->dev,
978 usb_rcvbulkpipe(serial->dev,
979 port->bulk_in_endpointAddress),
980 port->bulk_in_buffer,
981 quatech_port->read_urb->transfer_buffer_length,
982 qt_read_bulk_callback, quatech_port);
983
984 dbg("qt_open: bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
985 quatech_port->read_urb_busy = true;
986 result = usb_submit_urb(quatech_port->read_urb, GFP_KERNEL);
987 if (result) {
988 dev_err(&port->dev,
989 "%s - Error %d submitting control urb\n",
990 __func__, result);
991 quatech_port->read_urb_busy = false;
992 }
993
994
995 init_waitqueue_head(&quatech_port->wait);
996 init_waitqueue_head(&quatech_port->msr_wait);
997
998
999 memset(&(quatech_port->icount), 0x00, sizeof(quatech_port->icount));
1000
1001 return 0;
1002
1003}
1004
1005static int qt_chars_in_buffer(struct tty_struct *tty)
1006{
1007 struct usb_serial_port *port = tty->driver_data;
1008 struct usb_serial *serial;
1009 int chars = 0;
1010
1011 serial = get_usb_serial(port, __func__);
1012
1013 dbg("%s - port %d\n", __func__, port->number);
1014
1015 if (serial->num_bulk_out) {
1016 if (port->write_urb->status == -EINPROGRESS)
1017 chars = port->write_urb->transfer_buffer_length;
1018 }
1019
1020 dbg("%s - returns %d\n", __func__, chars);
1021
1022 return chars;
1023}
1024
1025static void qt_block_until_empty(struct tty_struct *tty,
1026 struct quatech_port *qt_port)
1027{
1028 int timeout = HZ / 10;
1029 int wait = 30;
1030 int count;
1031
1032 while (1) {
1033
1034 count = qt_chars_in_buffer(tty);
1035
1036 if (count <= 0)
1037 return;
1038
1039 interruptible_sleep_on_timeout(&qt_port->wait, timeout);
1040
1041 wait--;
1042 if (wait == 0) {
1043 dbg("%s - TIMEOUT", __func__);
1044 return;
1045 } else {
1046 wait = 30;
1047 }
1048 }
1049}
1050
1051static void qt_close(struct usb_serial_port *port)
1052{
1053 struct usb_serial *serial = port->serial;
1054 struct quatech_port *qt_port;
1055 struct quatech_port *port0;
1056 struct tty_struct *tty;
1057 int status;
1058 unsigned int index;
1059 status = 0;
1060
1061 dbg("%s - port %d\n", __func__, port->number);
1062
1063 tty = tty_port_tty_get(&port->port);
1064 index = tty->index - serial->minor;
1065
1066 qt_port = qt_get_port_private(port);
1067 port0 = qt_get_port_private(serial->port[0]);
1068
1069
1070 if (serial->num_bulk_out)
1071 usb_unlink_urb(port->write_urb);
1072 if (serial->num_bulk_in)
1073 usb_unlink_urb(port->read_urb);
1074
1075
1076 if (serial->dev)
1077 qt_block_until_empty(tty, qt_port);
1078 tty_kref_put(tty);
1079
1080
1081 status = qt_close_channel(serial, index);
1082 if (status < 0)
1083 dbg("%s - port %d qt_close_channel failed.\n",
1084 __func__, port->number);
1085
1086 port0->open_ports--;
1087
1088 dbg("qt_num_open_ports in close%d:in port%d\n",
1089 port0->open_ports, port->number);
1090
1091 if (port0->open_ports == 0) {
1092 if (serial->port[0]->interrupt_in_urb) {
1093 dbg("%s", "Shutdown interrupt_in_urb\n");
1094 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1095 }
1096
1097 }
1098
1099 if (qt_port->write_urb) {
1100
1101 if (qt_port->write_urb->transfer_buffer != NULL)
1102 kfree(qt_port->write_urb->transfer_buffer);
1103 usb_free_urb(qt_port->write_urb);
1104 }
1105
1106}
1107
1108static int qt_write(struct tty_struct *tty, struct usb_serial_port *port,
1109 const unsigned char *buf, int count)
1110{
1111 int result;
1112 struct usb_serial *serial = get_usb_serial(port, __func__);
1113
1114 if (serial == NULL)
1115 return -ENODEV;
1116
1117 dbg("%s - port %d\n", __func__, port->number);
1118
1119 if (count == 0) {
1120 dbg("%s - write request of 0 bytes\n", __func__);
1121 return 0;
1122 }
1123
1124
1125 if (serial->num_bulk_out) {
1126 if (port->write_urb->status == -EINPROGRESS) {
1127 dbg("%s - already writing\n", __func__);
1128 return 0;
1129 }
1130
1131 count =
1132 (count > port->bulk_out_size) ? port->bulk_out_size : count;
1133 memcpy(port->write_urb->transfer_buffer, buf, count);
1134
1135
1136
1137 usb_fill_bulk_urb(port->write_urb, serial->dev,
1138 usb_sndbulkpipe(serial->dev,
1139 port->
1140 bulk_out_endpointAddress),
1141 port->write_urb->transfer_buffer, count,
1142 qt_write_bulk_callback, port);
1143
1144
1145 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1146 if (result)
1147 dbg("%s - failed submitting write urb, error %d\n",
1148 __func__, result);
1149 else
1150 result = count;
1151
1152 return result;
1153 }
1154
1155
1156 return 0;
1157}
1158
1159static int qt_write_room(struct tty_struct *tty)
1160{
1161 struct usb_serial_port *port = tty->driver_data;
1162 struct usb_serial *serial;
1163 struct quatech_port *qt_port;
1164 unsigned long flags;
1165
1166 int retval = -EINVAL;
1167
1168 if (port_paranoia_check(port, __func__)) {
1169 dbg("%s", "Invalid port\n");
1170 return -1;
1171 }
1172
1173 serial = get_usb_serial(port, __func__);
1174
1175 if (!serial)
1176 return -ENODEV;
1177
1178 qt_port = qt_get_port_private(port);
1179
1180 spin_lock_irqsave(&qt_port->lock, flags);
1181
1182 dbg("%s - port %d\n", __func__, port->number);
1183
1184 if (serial->num_bulk_out) {
1185 if (port->write_urb->status != -EINPROGRESS)
1186 retval = port->bulk_out_size;
1187 }
1188
1189 spin_unlock_irqrestore(&qt_port->lock, flags);
1190 return retval;
1191
1192}
1193
1194static int qt_ioctl(struct tty_struct *tty, struct file *file,
1195 unsigned int cmd, unsigned long arg)
1196{
1197 struct usb_serial_port *port = tty->driver_data;
1198 struct quatech_port *qt_port = qt_get_port_private(port);
1199 struct usb_serial *serial = get_usb_serial(port, __func__);
1200 unsigned int index;
1201
1202 dbg("%s cmd 0x%04x", __func__, cmd);
1203
1204 index = tty->index - serial->minor;
1205
1206 if (cmd == TIOCMIWAIT) {
1207 while (qt_port != NULL) {
1208 interruptible_sleep_on(&qt_port->msr_wait);
1209 if (signal_pending(current))
1210 return -ERESTARTSYS;
1211 else {
1212 char diff = qt_port->diff_status;
1213
1214 if (diff == 0)
1215 return -EIO;
1216
1217
1218 qt_port->diff_status = 0;
1219
1220 if (((arg & TIOCM_RNG)
1221 && (diff & SERIAL_MSR_RI))
1222 || ((arg & TIOCM_DSR)
1223 && (diff & SERIAL_MSR_DSR))
1224 || ((arg & TIOCM_CD)
1225 && (diff & SERIAL_MSR_CD))
1226 || ((arg & TIOCM_CTS)
1227 && (diff & SERIAL_MSR_CTS))) {
1228 return 0;
1229 }
1230 }
1231 }
1232 return 0;
1233 }
1234
1235 dbg("%s -No ioctl for that one. port = %d\n", __func__, port->number);
1236 return -ENOIOCTLCMD;
1237}
1238
1239static void qt_set_termios(struct tty_struct *tty,
1240 struct usb_serial_port *port,
1241 struct ktermios *old_termios)
1242{
1243 struct ktermios *termios = tty->termios;
1244 unsigned char new_LCR = 0;
1245 unsigned int cflag = termios->c_cflag;
1246 unsigned int index;
1247 int baud, divisor, remainder;
1248 int status;
1249
1250 dbg("%s", __func__);
1251
1252 index = tty->index - port->serial->minor;
1253
1254 switch (cflag) {
1255 case CS5:
1256 new_LCR |= SERIAL_5_DATA;
1257 break;
1258 case CS6:
1259 new_LCR |= SERIAL_6_DATA;
1260 break;
1261 case CS7:
1262 new_LCR |= SERIAL_7_DATA;
1263 break;
1264 default:
1265 case CS8:
1266 new_LCR |= SERIAL_8_DATA;
1267 break;
1268 }
1269
1270
1271 if (cflag & PARENB) {
1272 if (cflag & PARODD)
1273 new_LCR |= SERIAL_ODD_PARITY;
1274 else
1275 new_LCR |= SERIAL_EVEN_PARITY;
1276 }
1277 if (cflag & CSTOPB)
1278 new_LCR |= SERIAL_TWO_STOPB;
1279 else
1280 new_LCR |= SERIAL_ONE_STOPB;
1281
1282 dbg("%s - 4\n", __func__);
1283
1284
1285 baud = tty_get_baud_rate(tty);
1286 if (!baud)
1287
1288 baud = 9600;
1289
1290 dbg("%s - got baud = %d\n", __func__, baud);
1291
1292 divisor = MAX_BAUD_RATE / baud;
1293 remainder = MAX_BAUD_RATE % baud;
1294
1295 if (((remainder * 2) >= baud) && (baud != 110))
1296 divisor++;
1297
1298
1299
1300
1301 status =
1302 qt_setuart(port->serial, index, (unsigned short)divisor, new_LCR);
1303 if (status < 0) {
1304 dbg(__FILE__ "qt_setuart failed\n");
1305 return;
1306 }
1307
1308
1309 if (cflag & CRTSCTS) {
1310 dbg("%s - Enabling HW flow control port %d\n", __func__,
1311 port->number);
1312
1313
1314 status = BoxSetHW_FlowCtrl(port->serial, index, 1);
1315
1316 if (status < 0) {
1317 dbg(__FILE__ "BoxSetHW_FlowCtrl failed\n");
1318 return;
1319 }
1320 } else {
1321
1322 dbg("%s - disabling HW flow control port %d\n", __func__,
1323 port->number);
1324
1325 status = BoxSetHW_FlowCtrl(port->serial, index, 0);
1326 if (status < 0) {
1327 dbg(__FILE__ "BoxSetHW_FlowCtrl failed\n");
1328 return;
1329 }
1330
1331 }
1332
1333
1334
1335 if (I_IXOFF(tty) || I_IXON(tty)) {
1336 unsigned char stop_char = STOP_CHAR(tty);
1337 unsigned char start_char = START_CHAR(tty);
1338 status =
1339 BoxSetSW_FlowCtrl(port->serial, index, stop_char,
1340 start_char);
1341 if (status < 0)
1342 dbg(__FILE__ "BoxSetSW_FlowCtrl (enabled) failed\n");
1343
1344 } else {
1345
1346 status = BoxDisable_SW_FlowCtrl(port->serial, index);
1347 if (status < 0)
1348 dbg(__FILE__ "BoxSetSW_FlowCtrl (diabling) failed\n");
1349
1350 }
1351 tty->termios->c_cflag &= ~CMSPAR;
1352
1353}
1354
1355static void qt_break(struct tty_struct *tty, int break_state)
1356{
1357 struct usb_serial_port *port = tty->driver_data;
1358 struct usb_serial *serial = get_usb_serial(port, __func__);
1359 struct quatech_port *qt_port;
1360 u16 index, onoff;
1361 unsigned int result;
1362 unsigned long flags;
1363
1364 index = tty->index - serial->minor;
1365
1366 qt_port = qt_get_port_private(port);
1367
1368 if (break_state == -1)
1369 onoff = 1;
1370 else
1371 onoff = 0;
1372
1373 spin_lock_irqsave(&qt_port->lock, flags);
1374
1375 dbg("%s - port %d\n", __func__, port->number);
1376
1377 result =
1378 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
1379 QT_BREAK_CONTROL, 0x40, onoff, index, NULL, 0, 300);
1380
1381 spin_unlock_irqrestore(&qt_port->lock, flags);
1382}
1383
1384static inline int qt_real_tiocmget(struct tty_struct *tty,
1385 struct usb_serial_port *port,
1386 struct file *file, struct usb_serial *serial)
1387{
1388
1389 u8 mcr;
1390 u8 msr;
1391 unsigned int result = 0;
1392 int status;
1393 unsigned int index;
1394
1395 dbg("%s - port %d, tty =0x%p\n", __func__, port->number, tty);
1396
1397 index = tty->index - serial->minor;
1398 status =
1399 BoxGetRegister(port->serial, index, MODEM_CONTROL_REGISTER, &mcr);
1400 if (status >= 0) {
1401 status =
1402 BoxGetRegister(port->serial, index,
1403 MODEM_STATUS_REGISTER, &msr);
1404
1405 }
1406
1407 if (status >= 0) {
1408 result = ((mcr & SERIAL_MCR_DTR) ? TIOCM_DTR : 0)
1409
1410 | ((mcr & SERIAL_MCR_RTS) ? TIOCM_RTS : 0)
1411
1412 | ((msr & SERIAL_MSR_CTS) ? TIOCM_CTS : 0)
1413
1414 | ((msr & SERIAL_MSR_CD) ? TIOCM_CAR : 0)
1415
1416 | ((msr & SERIAL_MSR_RI) ? TIOCM_RI : 0)
1417
1418 | ((msr & SERIAL_MSR_DSR) ? TIOCM_DSR : 0);
1419
1420 return result;
1421
1422 } else
1423 return -ESPIPE;
1424}
1425
1426static inline int qt_real_tiocmset(struct tty_struct *tty,
1427 struct usb_serial_port *port,
1428 struct file *file,
1429 struct usb_serial *serial,
1430 unsigned int value)
1431{
1432
1433 u8 mcr;
1434 int status;
1435 unsigned int index;
1436
1437 dbg("%s - port %d\n", __func__, port->number);
1438
1439 index = tty->index - serial->minor;
1440 status =
1441 BoxGetRegister(port->serial, index, MODEM_CONTROL_REGISTER, &mcr);
1442 if (status < 0)
1443 return -ESPIPE;
1444
1445
1446
1447
1448
1449 mcr &= ~(SERIAL_MCR_RTS | SERIAL_MCR_DTR | SERIAL_MCR_LOOP);
1450 if (value & TIOCM_RTS)
1451 mcr |= SERIAL_MCR_RTS;
1452 if (value & TIOCM_DTR)
1453 mcr |= SERIAL_MCR_DTR;
1454 if (value & TIOCM_LOOP)
1455 mcr |= SERIAL_MCR_LOOP;
1456
1457 status =
1458 BoxSetRegister(port->serial, index, MODEM_CONTROL_REGISTER, mcr);
1459 if (status < 0)
1460 return -ESPIPE;
1461 else
1462 return 0;
1463}
1464
1465static int qt_tiocmget(struct tty_struct *tty, struct file *file)
1466{
1467 struct usb_serial_port *port = tty->driver_data;
1468 struct usb_serial *serial = get_usb_serial(port, __func__);
1469 struct quatech_port *qt_port = qt_get_port_private(port);
1470 int retval = -ENODEV;
1471 unsigned long flags;
1472
1473 dbg("In %s\n", __func__);
1474
1475 if (!serial)
1476 return -ENODEV;
1477
1478 spin_lock_irqsave(&qt_port->lock, flags);
1479
1480 dbg("%s - port %d\n", __func__, port->number);
1481 dbg("%s - port->RxHolding = %d\n", __func__, qt_port->RxHolding);
1482
1483 retval = qt_real_tiocmget(tty, port, file, serial);
1484
1485 spin_unlock_irqrestore(&qt_port->lock, flags);
1486 return retval;
1487}
1488
1489static int qt_tiocmset(struct tty_struct *tty, struct file *file,
1490 unsigned int set, unsigned int clear)
1491{
1492
1493 struct usb_serial_port *port = tty->driver_data;
1494 struct usb_serial *serial = get_usb_serial(port, __func__);
1495 struct quatech_port *qt_port = qt_get_port_private(port);
1496 unsigned long flags;
1497 int retval = -ENODEV;
1498
1499 dbg("In %s\n", __func__);
1500
1501 if (!serial)
1502 return -ENODEV;
1503
1504 spin_lock_irqsave(&qt_port->lock, flags);
1505
1506 dbg("%s - port %d\n", __func__, port->number);
1507 dbg("%s - qt_port->RxHolding = %d\n", __func__, qt_port->RxHolding);
1508
1509 retval = qt_real_tiocmset(tty, port, file, serial, set);
1510
1511 spin_unlock_irqrestore(&qt_port->lock, flags);
1512 return retval;
1513}
1514
1515static void qt_throttle(struct tty_struct *tty)
1516{
1517 struct usb_serial_port *port = tty->driver_data;
1518 struct usb_serial *serial = get_usb_serial(port, __func__);
1519 struct quatech_port *qt_port;
1520 unsigned long flags;
1521
1522 dbg("%s - port %d\n", __func__, port->number);
1523
1524 if (!serial)
1525 return;
1526
1527 qt_port = qt_get_port_private(port);
1528
1529 spin_lock_irqsave(&qt_port->lock, flags);
1530
1531
1532 qt_port->RxHolding = 1;
1533 dbg("%s - port->RxHolding = 1\n", __func__);
1534
1535 spin_unlock_irqrestore(&qt_port->lock, flags);
1536 return;
1537}
1538
1539static void qt_unthrottle(struct tty_struct *tty)
1540{
1541 struct usb_serial_port *port = tty->driver_data;
1542 struct usb_serial *serial = get_usb_serial(port, __func__);
1543 struct quatech_port *qt_port;
1544 unsigned long flags;
1545 unsigned int result;
1546
1547 if (!serial)
1548 return;
1549
1550 qt_port = qt_get_port_private(port);
1551
1552 spin_lock_irqsave(&qt_port->lock, flags);
1553
1554 dbg("%s - port %d\n", __func__, port->number);
1555
1556 if (qt_port->RxHolding == 1) {
1557 dbg("%s -qt_port->RxHolding == 1\n", __func__);
1558
1559 qt_port->RxHolding = 0;
1560 dbg("%s - qt_port->RxHolding = 0\n", __func__);
1561
1562
1563 if ((serial->num_bulk_in) && (qt_port->ReadBulkStopped == 1)) {
1564
1565 usb_fill_bulk_urb(port->read_urb, serial->dev,
1566 usb_rcvbulkpipe(serial->dev,
1567 port->bulk_in_endpointAddress),
1568 port->read_urb->transfer_buffer,
1569 port->read_urb->
1570 transfer_buffer_length,
1571 qt_read_bulk_callback, port);
1572 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
1573 if (result)
1574 err("%s - failed restarting read urb, error %d",
1575 __func__, result);
1576 }
1577 }
1578 spin_unlock_irqrestore(&qt_port->lock, flags);
1579 return;
1580
1581}
1582
1583static int qt_calc_num_ports(struct usb_serial *serial)
1584{
1585 int num_ports;
1586
1587 dbg("numberofendpoints: %d\n",
1588 (int)serial->interface->cur_altsetting->desc.bNumEndpoints);
1589 dbg("numberofendpoints: %d\n",
1590 (int)serial->interface->altsetting->desc.bNumEndpoints);
1591
1592 num_ports =
1593 (serial->interface->cur_altsetting->desc.bNumEndpoints - 1) / 2;
1594
1595 return num_ports;
1596}
1597
1598static struct usb_serial_driver quatech_device = {
1599 .driver = {
1600 .owner = THIS_MODULE,
1601 .name = "serqt",
1602 },
1603 .description = DRIVER_DESC,
1604 .usb_driver = &serqt_usb_driver,
1605 .id_table = serqt_id_table,
1606 .num_ports = 8,
1607 .open = qt_open,
1608 .close = qt_close,
1609 .write = qt_write,
1610 .write_room = qt_write_room,
1611 .chars_in_buffer = qt_chars_in_buffer,
1612 .throttle = qt_throttle,
1613 .unthrottle = qt_unthrottle,
1614 .calc_num_ports = qt_calc_num_ports,
1615 .ioctl = qt_ioctl,
1616 .set_termios = qt_set_termios,
1617 .break_ctl = qt_break,
1618 .tiocmget = qt_tiocmget,
1619 .tiocmset = qt_tiocmset,
1620 .attach = qt_startup,
1621 .release = qt_release,
1622};
1623
1624static int __init serqt_usb_init(void)
1625{
1626 int retval;
1627
1628 dbg("%s\n", __func__);
1629
1630
1631 retval = usb_serial_register(&quatech_device);
1632
1633 if (retval)
1634 goto failed_usb_serial_register;
1635
1636 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1637 DRIVER_DESC "\n");
1638
1639
1640
1641 retval = usb_register(&serqt_usb_driver);
1642 if (retval == 0)
1643 return 0;
1644
1645
1646 usb_serial_deregister(&quatech_device);
1647failed_usb_serial_register:
1648 return retval;
1649}
1650
1651static void __exit serqt_usb_exit(void)
1652{
1653 usb_deregister(&serqt_usb_driver);
1654 usb_serial_deregister(&quatech_device);
1655}
1656
1657module_init(serqt_usb_init);
1658module_exit(serqt_usb_exit);
1659
1660MODULE_AUTHOR(DRIVER_AUTHOR);
1661MODULE_DESCRIPTION(DRIVER_DESC);
1662MODULE_LICENSE("GPL");
1663
1664module_param(debug, bool, S_IRUGO | S_IWUSR);
1665MODULE_PARM_DESC(debug, "Debug enabled or not");
1666
