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