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Merge tag 'v3.10.85' into update
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / staging / serqt_usb2 / serqt_usb2.c
1 /*
2 * This code was developed for the Quatech USB line for linux, it used
3 * much of the code developed by Greg Kroah-Hartman for USB serial devices
4 *
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 /* Version Information */
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 /* Quatech VID */
25 #define QUATECH_SSU200 0xC030 /* SSU200 */
26 #define QUATECH_DSU100 0xC040 /* DSU100 */
27 #define QUATECH_DSU200 0xC050 /* DSU200 */
28 #define QUATECH_QSU100 0xC060 /* QSU100 */
29 #define QUATECH_QSU200 0xC070 /* QSU200 */
30 #define QUATECH_ESU100A 0xC080 /* ESU100A */
31 #define QUATECH_ESU100B 0xC081 /* ESU100B */
32 #define QUATECH_ESU200A 0xC0A0 /* ESU200A */
33 #define QUATECH_ESU200B 0xC0A1 /* ESU200B */
34 #define QUATECH_HSU100A 0xC090 /* HSU100A */
35 #define QUATECH_HSU100B 0xC091 /* HSU100B */
36 #define QUATECH_HSU100C 0xC092 /* HSU100C */
37 #define QUATECH_HSU100D 0xC093 /* HSU100D */
38 #define QUATECH_HSU200A 0xC0B0 /* HSU200A */
39 #define QUATECH_HSU200B 0xC0B1 /* HSU200B */
40 #define QUATECH_HSU200C 0xC0B2 /* HSU200C */
41 #define QUATECH_HSU200D 0xC0B3 /* HSU200D */
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 /* gives 9600 baud rate */
91 #define DEFAULT_LCR SERIAL_8_DATA /* 8, none , 1 */
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 /* for clearing clock bits */
111 #define DUPMODE_BITS 0xc0
112 #define CLKS_X4 0x02
113
114 #define LOOPMODE_BITS 0x41 /* LOOP1 = b6, LOOP0 = b0 (PORT B) */
115 #define ALL_LOOPBACK 0x01
116 #define MODEM_CTRL 0x40
117 #define RS232_MODE 0x00
118
119 static 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 {} /* Terminating entry */
138 };
139 MODULE_DEVICE_TABLE(usb, id_table);
140
141 struct qt_get_device_data {
142 __u8 porta;
143 __u8 portb;
144 __u8 portc;
145 };
146
147 struct qt_open_channel_data {
148 __u8 line_status;
149 __u8 modem_status;
150 };
151
152 struct quatech_port {
153 int port_num; /* number of the port */
154 struct urb *write_urb; /* write URB for this port */
155 struct urb *read_urb; /* read URB for this port */
156 struct urb *int_urb;
157
158 __u8 shadowLCR; /* last LCR value received */
159 __u8 shadowMCR; /* last MCR value received */
160 __u8 shadowMSR; /* last MSR value received */
161 __u8 shadowLSR; /* last LSR value received */
162 char open_ports;
163
164 /* Used for TIOCMIWAIT */
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; /* owner of this object */
173 struct qt_get_device_data DeviceData;
174 struct mutex lock;
175 bool read_urb_busy;
176 int RxHolding;
177 int ReadBulkStopped;
178 char closePending;
179 };
180
181 static 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
196 static 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
212 static 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
218 static 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
224 static struct usb_serial *get_usb_serial(struct usb_serial_port *port,
225 const char *function)
226 {
227 /* if no port was specified, or it fails a paranoia check */
228 if (!port ||
229 port_paranoia_check(port, function) ||
230 serial_paranoia_check(port->serial, function)) {
231 /*
232 * then say that we dont have a valid usb_serial thing,
233 * which will end up genrating -ENODEV return values
234 */
235 return NULL;
236 }
237
238 return port->serial;
239 }
240
241 static void ProcessLineStatus(struct quatech_port *qt_port,
242 unsigned char line_status)
243 {
244
245 qt_port->shadowLSR =
246 line_status & (SERIAL_LSR_OE | SERIAL_LSR_PE | SERIAL_LSR_FE |
247 SERIAL_LSR_BI);
248 }
249
250 static void ProcessModemStatus(struct quatech_port *qt_port,
251 unsigned char modem_status)
252 {
253
254 qt_port->shadowMSR = modem_status;
255 wake_up_interruptible(&qt_port->wait);
256 }
257
258 static void ProcessRxChar(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
265 static 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
283 static void qt_interrupt_callback(struct urb *urb)
284 {
285 /* FIXME */
286 }
287
288 static 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 RxCount = urb->actual_length;
295
296 for (i = 0; i < RxCount; ++i) {
297 /* Look ahead code here */
298 if ((i <= (RxCount - 3)) && (data[i] == 0x1b)
299 && (data[i + 1] == 0x1b)) {
300 flag = 0;
301 switch (data[i + 2]) {
302 case 0x00:
303 if (i > (RxCount - 4)) {
304 dev_dbg(&port->dev,
305 "Illegal escape seuences in received data\n");
306 break;
307 }
308
309 ProcessLineStatus(qt_port, data[i + 3]);
310
311 i += 3;
312 flag = 1;
313 break;
314
315 case 0x01:
316 if (i > (RxCount - 4)) {
317 dev_dbg(&port->dev,
318 "Illegal escape seuences in received data\n");
319 break;
320 }
321
322 ProcessModemStatus(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 ProcessRxChar(port, data[i]);
332 ProcessRxChar(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
348 static 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->ReadBulkStopped = 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->RxHolding = %d\n", __func__, qt_port->RxHolding);
366
367 if (port_paranoia_check(port, __func__) != 0) {
368 qt_port->ReadBulkStopped = 1;
369 return;
370 }
371
372 if (!serial)
373 return;
374
375 if (qt_port->closePending == 1) {
376 /* Were closing , stop reading */
377 dev_dbg(&port->dev,
378 "%s - (qt_port->closepending == 1\n", __func__);
379 qt_port->ReadBulkStopped = 1;
380 return;
381 }
382
383 /*
384 * RxHolding is asserted by throttle, if we assert it, we're not
385 * receiving any more characters and let the box handle the flow
386 * control
387 */
388 if (qt_port->RxHolding == 1) {
389 qt_port->ReadBulkStopped = 1;
390 return;
391 }
392
393 if (urb->status) {
394 qt_port->ReadBulkStopped = 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 /* Continue trying to always read */
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 * qt_get_device
429 * Issue a GET_DEVICE vendor-specific request on the default control pipe If
430 * successful, fills in the qt_get_device_data structure pointed to by
431 * device_data, otherwise return a negative error number of the problem.
432 */
433
434 static 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 * BoxSetPrebufferLevel
459 TELLS BOX WHEN TO ASSERT FLOW CONTROL
460 ****************************************************************************/
461 static int BoxSetPrebufferLevel(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 * BoxSetATC
475 TELLS BOX WHEN TO ASSERT automatic transmitter control
476 ****************************************************************************/
477 static int BoxSetATC(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 * qt_set_device
493 * Issue a SET_DEVICE vendor-specific request on the default control pipe If
494 * successful returns the number of bytes written, otherwise it returns a
495 * negative error number of the problem.
496 */
497 static 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 PortSettings;
503
504 PortSettings = ((__u16) (device_data->portb));
505 PortSettings = (PortSettings << 8);
506 PortSettings += ((__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, PortSettings,
512 0, NULL, 0, 300);
513 return result;
514 }
515
516 static int qt_open_channel(struct usb_serial *serial, __u16 Uart_Number,
517 struct qt_open_channel_data *pDeviceData)
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_Number,
524 pDeviceData,
525 sizeof(struct qt_open_channel_data), 300);
526
527 return result;
528
529 }
530
531 static int qt_close_channel(struct usb_serial *serial, __u16 Uart_Number)
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_Number,
538 NULL, 0, 300);
539
540 return result;
541
542 }
543
544 /****************************************************************************
545 * BoxGetRegister
546 * issuse a GET_REGISTER vendor-spcific request on the default control pipe
547 * If successful, fills in the pValue with the register value asked for
548 ****************************************************************************/
549 static int BoxGetRegister(struct usb_serial *serial, unsigned short Uart_Number,
550 unsigned short Register_Num, __u8 *pValue)
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_Number, (void *)pValue, sizeof(*pValue), 300);
561
562 return result;
563 }
564
565 /****************************************************************************
566 * BoxSetRegister
567 * issuse a GET_REGISTER vendor-spcific request on the default control pipe
568 * If successful, fills in the pValue with the register value asked for
569 ****************************************************************************/
570 static int BoxSetRegister(struct usb_serial *serial, unsigned short Uart_Number,
571 unsigned short Register_Num, unsigned short Value)
572 {
573 int result;
574 unsigned short RegAndByte;
575
576 RegAndByte = Value;
577 RegAndByte = RegAndByte << 8;
578 RegAndByte = RegAndByte + Register_Num;
579
580 /*
581 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
582 QT_GET_SET_REGISTER, 0xC0, Register_Num,
583 Uart_Number, NULL, 0, 300);
584 */
585
586 result =
587 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
588 QT_GET_SET_REGISTER, 0x40, RegAndByte, Uart_Number,
589 NULL, 0, 300);
590
591 return result;
592 }
593
594 /*
595 * qt_setuart
596 * issues a SET_UART vendor-specific request on the default control pipe
597 * If successful sets baud rate divisor and LCR value
598 */
599 static int qt_setuart(struct usb_serial *serial, unsigned short Uart_Number,
600 unsigned short default_divisor, unsigned char default_LCR)
601 {
602 int result;
603 unsigned short UartNumandLCR;
604
605 UartNumandLCR = (default_LCR << 8) + Uart_Number;
606
607 result =
608 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
609 QT_GET_SET_UART, 0x40, default_divisor,
610 UartNumandLCR, NULL, 0, 300);
611
612 return result;
613 }
614
615 static int BoxSetHW_FlowCtrl(struct usb_serial *serial, unsigned int index,
616 int bSet)
617 {
618 __u8 mcr = 0;
619 __u8 msr = 0, MOUT_Value = 0;
620 unsigned int status;
621
622 if (bSet == 1) {
623 /* flow control, box will clear RTS line to prevent remote */
624 mcr = SERIAL_MCR_RTS;
625 } /* device from xmitting more chars */
626 else {
627 /* no flow control to remote device */
628 mcr = 0;
629
630 }
631 MOUT_Value = mcr << 8;
632
633 if (bSet == 1) {
634 /* flow control, box will inhibit xmit data if CTS line is
635 * asserted */
636 msr = SERIAL_MSR_CTS;
637 } else {
638 /* Box will not inhimbe xmit data due to CTS line */
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
651 static int BoxSetSW_FlowCtrl(struct usb_serial *serial, __u16 index,
652 unsigned char stop_char, unsigned char start_char)
653 {
654 __u16 nSWflowout;
655 int result;
656
657 nSWflowout = start_char << 8;
658 nSWflowout = (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, nSWflowout,
663 index, NULL, 0, 300);
664 return result;
665
666 }
667
668 static int BoxDisable_SW_FlowCtrl(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
680 static 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 DeviceData;
686 int i;
687 int status;
688
689 /* Now setup per port private data */
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, &DeviceData);
708 if (status < 0)
709 goto startup_error;
710
711 dev_dbg(dev, "DeviceData.portb = 0x%x\n", DeviceData.portb);
712
713 DeviceData.portb &= ~FULLPWRBIT;
714 dev_dbg(dev, "Changing DeviceData.portb to 0x%x\n", DeviceData.portb);
715
716 status = qt_set_device(serial, &DeviceData);
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, &DeviceData);
723 if (status < 0) {
724 dev_dbg(dev, "qt_get_device failed\n");
725 goto startup_error;
726 }
727
728 switch (le16_to_cpu(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 DeviceData.porta &= ~(RR_BITS | DUPMODE_BITS);
738 DeviceData.porta |= CLKS_X4;
739 DeviceData.portb &= ~(LOOPMODE_BITS);
740 DeviceData.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 DeviceData.porta &= ~(RR_BITS | DUPMODE_BITS);
753 DeviceData.porta |= CLKS_X4;
754 DeviceData.portb &= ~(LOOPMODE_BITS);
755 DeviceData.portb |= ALL_LOOPBACK;
756 break;
757 default:
758 DeviceData.porta &= ~(RR_BITS | DUPMODE_BITS);
759 DeviceData.porta |= CLKS_X4;
760 DeviceData.portb &= ~(LOOPMODE_BITS);
761 DeviceData.portb |= RS232_MODE;
762 break;
763
764 }
765
766 status = BoxSetPrebufferLevel(serial); /* sets to default value */
767 if (status < 0) {
768 dev_dbg(dev, "BoxSetPrebufferLevel failed\n");
769 goto startup_error;
770 }
771
772 status = BoxSetATC(serial, ATC_DISABLED);
773 if (status < 0) {
774 dev_dbg(dev, "BoxSetATC failed\n");
775 goto startup_error;
776 }
777
778 dev_dbg(dev, "DeviceData.portb = 0x%x\n", DeviceData.portb);
779
780 DeviceData.portb |= NEXT_BOARD_POWER_BIT;
781 dev_dbg(dev, "Changing DeviceData.portb to 0x%x\n", DeviceData.portb);
782
783 status = qt_set_device(serial, &DeviceData);
784 if (status < 0) {
785 dev_dbg(dev, "qt_set_device failed\n");
786 goto startup_error;
787 }
788
789 return 0;
790
791 startup_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
802 static 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
820 static 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 /* set up interrupt urb */
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
845 static 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 ChannelData;
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->DeviceData);
874
875 /* Port specific setups */
876 result = qt_open_channel(serial, port->number, &ChannelData);
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 /* FIXME: are these needed? Does it even do anything useful? */
884 quatech_port->shadowLSR = ChannelData.line_status &
885 (SERIAL_LSR_OE | SERIAL_LSR_PE | SERIAL_LSR_FE | SERIAL_LSR_BI);
886
887 quatech_port->shadowMSR = ChannelData.modem_status &
888 (SERIAL_MSR_CTS | SERIAL_MSR_DSR | SERIAL_MSR_RI | SERIAL_MSR_CD);
889
890 /* Set Baud rate to default and turn off (default)flow control here */
891 result = qt_setuart(serial, 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 * Put this here to make it responsive to stty and defaults set by
900 * the tty layer
901 */
902
903 /* Check to see if we've set up our endpoint info yet */
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, "port number is %d\n", port->number);
910 dev_dbg(&port->dev, "serial number is %d\n", port->serial->minor);
911 dev_dbg(&port->dev,
912 "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
913 dev_dbg(&port->dev,
914 "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress);
915 dev_dbg(&port->dev, "Interrupt endpoint is %d\n",
916 port->interrupt_in_endpointAddress);
917 dev_dbg(&port->dev, "port's number in the device is %d\n",
918 quatech_port->port_num);
919 quatech_port->read_urb = port->read_urb;
920
921 /* set up our bulk in urb */
922
923 usb_fill_bulk_urb(quatech_port->read_urb,
924 serial->dev,
925 usb_rcvbulkpipe(serial->dev,
926 port->bulk_in_endpointAddress),
927 port->bulk_in_buffer,
928 quatech_port->read_urb->transfer_buffer_length,
929 qt_read_bulk_callback, quatech_port);
930
931 dev_dbg(&port->dev, "qt_open: bulkin endpoint is %d\n",
932 port->bulk_in_endpointAddress);
933 quatech_port->read_urb_busy = true;
934 result = usb_submit_urb(quatech_port->read_urb, GFP_KERNEL);
935 if (result) {
936 dev_err(&port->dev,
937 "%s - Error %d submitting control urb\n",
938 __func__, result);
939 quatech_port->read_urb_busy = false;
940 }
941
942 /* initialize our wait queues */
943 init_waitqueue_head(&quatech_port->wait);
944 init_waitqueue_head(&quatech_port->msr_wait);
945
946 /* initialize our icount structure */
947 memset(&(quatech_port->icount), 0x00, sizeof(quatech_port->icount));
948
949 return 0;
950
951 }
952
953 static int qt_chars_in_buffer(struct tty_struct *tty)
954 {
955 struct usb_serial_port *port = tty->driver_data;
956 struct usb_serial *serial;
957 int chars = 0;
958
959 serial = get_usb_serial(port, __func__);
960
961 if (serial->num_bulk_out) {
962 if (port->write_urb->status == -EINPROGRESS)
963 chars = port->write_urb->transfer_buffer_length;
964 }
965
966 return chars;
967 }
968
969 static void qt_block_until_empty(struct tty_struct *tty,
970 struct quatech_port *qt_port)
971 {
972 int timeout = HZ / 10;
973 int wait = 30;
974 int count;
975
976 while (1) {
977
978 count = qt_chars_in_buffer(tty);
979
980 if (count <= 0)
981 return;
982
983 interruptible_sleep_on_timeout(&qt_port->wait, timeout);
984
985 wait--;
986 if (wait == 0) {
987 dev_dbg(&qt_port->port->dev, "%s - TIMEOUT", __func__);
988 return;
989 } else {
990 wait = 30;
991 }
992 }
993 }
994
995 static void qt_close(struct usb_serial_port *port)
996 {
997 struct usb_serial *serial = port->serial;
998 struct quatech_port *qt_port;
999 struct quatech_port *port0;
1000 struct tty_struct *tty;
1001 int status;
1002 unsigned int index;
1003 status = 0;
1004
1005 tty = tty_port_tty_get(&port->port);
1006 index = tty->index - serial->minor;
1007
1008 qt_port = qt_get_port_private(port);
1009 port0 = qt_get_port_private(serial->port[0]);
1010
1011 /* shutdown any bulk reads that might be going on */
1012 if (serial->num_bulk_out)
1013 usb_unlink_urb(port->write_urb);
1014 if (serial->num_bulk_in)
1015 usb_unlink_urb(port->read_urb);
1016
1017 /* wait up to for transmitter to empty */
1018 if (serial->dev)
1019 qt_block_until_empty(tty, qt_port);
1020 tty_kref_put(tty);
1021
1022 /* Close uart channel */
1023 status = qt_close_channel(serial, index);
1024 if (status < 0)
1025 dev_dbg(&port->dev,
1026 "%s - port %d qt_close_channel failed.\n",
1027 __func__, port->number);
1028
1029 port0->open_ports--;
1030
1031 dev_dbg(&port->dev, "qt_num_open_ports in close%d:in port%d\n",
1032 port0->open_ports, port->number);
1033
1034 if (port0->open_ports == 0) {
1035 if (serial->port[0]->interrupt_in_urb) {
1036 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n");
1037 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1038 }
1039
1040 }
1041
1042 if (qt_port->write_urb) {
1043 /* if this urb had a transfer buffer already (old tx) free it */
1044 kfree(qt_port->write_urb->transfer_buffer);
1045 usb_free_urb(qt_port->write_urb);
1046 }
1047
1048 }
1049
1050 static int qt_write(struct tty_struct *tty, struct usb_serial_port *port,
1051 const unsigned char *buf, int count)
1052 {
1053 int result;
1054 struct usb_serial *serial = get_usb_serial(port, __func__);
1055
1056 if (serial == NULL)
1057 return -ENODEV;
1058
1059 if (count == 0) {
1060 dev_dbg(&port->dev,
1061 "%s - write request of 0 bytes\n", __func__);
1062 return 0;
1063 }
1064
1065 /* only do something if we have a bulk out endpoint */
1066 if (serial->num_bulk_out) {
1067 if (port->write_urb->status == -EINPROGRESS) {
1068 dev_dbg(&port->dev, "%s - already writing\n", __func__);
1069 return 0;
1070 }
1071
1072 count =
1073 (count > port->bulk_out_size) ? port->bulk_out_size : count;
1074 memcpy(port->write_urb->transfer_buffer, buf, count);
1075
1076 /* set up our urb */
1077
1078 usb_fill_bulk_urb(port->write_urb, serial->dev,
1079 usb_sndbulkpipe(serial->dev,
1080 port->
1081 bulk_out_endpointAddress),
1082 port->write_urb->transfer_buffer, count,
1083 qt_write_bulk_callback, port);
1084
1085 /* send the data out the bulk port */
1086 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1087 if (result)
1088 dev_dbg(&port->dev,
1089 "%s - failed submitting write urb, error %d\n",
1090 __func__, result);
1091 else
1092 result = count;
1093
1094 return result;
1095 }
1096
1097 /* no bulk out, so return 0 bytes written */
1098 return 0;
1099 }
1100
1101 static int qt_write_room(struct tty_struct *tty)
1102 {
1103 struct usb_serial_port *port = tty->driver_data;
1104 struct usb_serial *serial;
1105 struct quatech_port *qt_port;
1106
1107 int retval = -EINVAL;
1108
1109 if (port_paranoia_check(port, __func__))
1110 return -1;
1111
1112 serial = get_usb_serial(port, __func__);
1113
1114 if (!serial)
1115 return -ENODEV;
1116
1117 qt_port = qt_get_port_private(port);
1118
1119 mutex_lock(&qt_port->lock);
1120
1121 if (serial->num_bulk_out) {
1122 if (port->write_urb->status != -EINPROGRESS)
1123 retval = port->bulk_out_size;
1124 }
1125
1126 mutex_unlock(&qt_port->lock);
1127 return retval;
1128
1129 }
1130
1131 static int qt_ioctl(struct tty_struct *tty,
1132 unsigned int cmd, unsigned long arg)
1133 {
1134 struct usb_serial_port *port = tty->driver_data;
1135 struct quatech_port *qt_port = qt_get_port_private(port);
1136 struct usb_serial *serial = get_usb_serial(port, __func__);
1137 unsigned int index;
1138
1139 dev_dbg(&port->dev, "%s cmd 0x%04x\n", __func__, cmd);
1140
1141 index = tty->index - serial->minor;
1142
1143 if (cmd == TIOCMIWAIT) {
1144 while (qt_port != NULL) {
1145 interruptible_sleep_on(&qt_port->msr_wait);
1146 if (signal_pending(current))
1147 return -ERESTARTSYS;
1148 else {
1149 char diff = qt_port->diff_status;
1150
1151 if (diff == 0)
1152 return -EIO; /* no change => error */
1153
1154 /* Consume all events */
1155 qt_port->diff_status = 0;
1156
1157 if (((arg & TIOCM_RNG)
1158 && (diff & SERIAL_MSR_RI))
1159 || ((arg & TIOCM_DSR)
1160 && (diff & SERIAL_MSR_DSR))
1161 || ((arg & TIOCM_CD)
1162 && (diff & SERIAL_MSR_CD))
1163 || ((arg & TIOCM_CTS)
1164 && (diff & SERIAL_MSR_CTS))) {
1165 return 0;
1166 }
1167 }
1168 }
1169 return 0;
1170 }
1171
1172 dev_dbg(&port->dev, "%s -No ioctl for that one. port = %d\n",
1173 __func__, port->number);
1174 return -ENOIOCTLCMD;
1175 }
1176
1177 static void qt_set_termios(struct tty_struct *tty,
1178 struct usb_serial_port *port,
1179 struct ktermios *old_termios)
1180 {
1181 struct ktermios *termios = &tty->termios;
1182 unsigned char new_LCR = 0;
1183 unsigned int cflag = termios->c_cflag;
1184 unsigned int index;
1185 int baud, divisor, remainder;
1186 int status;
1187
1188 index = tty->index - port->serial->minor;
1189
1190 switch (cflag & CSIZE) {
1191 case CS5:
1192 new_LCR |= SERIAL_5_DATA;
1193 break;
1194 case CS6:
1195 new_LCR |= SERIAL_6_DATA;
1196 break;
1197 case CS7:
1198 new_LCR |= SERIAL_7_DATA;
1199 break;
1200 default:
1201 termios->c_cflag &= ~CSIZE;
1202 termios->c_cflag |= CS8;
1203 case CS8:
1204 new_LCR |= SERIAL_8_DATA;
1205 break;
1206 }
1207
1208 /* Parity stuff */
1209 if (cflag & PARENB) {
1210 if (cflag & PARODD)
1211 new_LCR |= SERIAL_ODD_PARITY;
1212 else
1213 new_LCR |= SERIAL_EVEN_PARITY;
1214 }
1215 if (cflag & CSTOPB)
1216 new_LCR |= SERIAL_TWO_STOPB;
1217 else
1218 new_LCR |= SERIAL_ONE_STOPB;
1219
1220 dev_dbg(&port->dev, "%s - 4\n", __func__);
1221
1222 /* Thats the LCR stuff, go ahead and set it */
1223 baud = tty_get_baud_rate(tty);
1224 if (!baud)
1225 /* pick a default, any default... */
1226 baud = 9600;
1227
1228 dev_dbg(&port->dev, "%s - got baud = %d\n", __func__, baud);
1229
1230 divisor = MAX_BAUD_RATE / baud;
1231 remainder = MAX_BAUD_RATE % baud;
1232 /* Round to nearest divisor */
1233 if (((remainder * 2) >= baud) && (baud != 110))
1234 divisor++;
1235
1236 /*
1237 * Set Baud rate to default and turn off (default)flow control here
1238 */
1239 status =
1240 qt_setuart(port->serial, index, (unsigned short)divisor, new_LCR);
1241 if (status < 0) {
1242 dev_dbg(&port->dev, "qt_setuart failed\n");
1243 return;
1244 }
1245
1246 /* Now determine flow control */
1247 if (cflag & CRTSCTS) {
1248 dev_dbg(&port->dev, "%s - Enabling HW flow control port %d\n",
1249 __func__, port->number);
1250
1251 /* Enable RTS/CTS flow control */
1252 status = BoxSetHW_FlowCtrl(port->serial, index, 1);
1253
1254 if (status < 0) {
1255 dev_dbg(&port->dev, "BoxSetHW_FlowCtrl failed\n");
1256 return;
1257 }
1258 } else {
1259 /* Disable RTS/CTS flow control */
1260 dev_dbg(&port->dev,
1261 "%s - disabling HW flow control port %d\n",
1262 __func__, port->number);
1263
1264 status = BoxSetHW_FlowCtrl(port->serial, index, 0);
1265 if (status < 0) {
1266 dev_dbg(&port->dev, "BoxSetHW_FlowCtrl failed\n");
1267 return;
1268 }
1269
1270 }
1271
1272 /* if we are implementing XON/XOFF, set the start and stop character in
1273 * the device */
1274 if (I_IXOFF(tty) || I_IXON(tty)) {
1275 unsigned char stop_char = STOP_CHAR(tty);
1276 unsigned char start_char = START_CHAR(tty);
1277 status =
1278 BoxSetSW_FlowCtrl(port->serial, index, stop_char,
1279 start_char);
1280 if (status < 0)
1281 dev_dbg(&port->dev,
1282 "BoxSetSW_FlowCtrl (enabled) failed\n");
1283
1284 } else {
1285 /* disable SW flow control */
1286 status = BoxDisable_SW_FlowCtrl(port->serial, index);
1287 if (status < 0)
1288 dev_dbg(&port->dev,
1289 "BoxSetSW_FlowCtrl (diabling) failed\n");
1290
1291 }
1292 termios->c_cflag &= ~CMSPAR;
1293 /* FIXME:
1294 Error cases should be returning the actual bits changed only
1295 */
1296 }
1297
1298 static void qt_break(struct tty_struct *tty, int break_state)
1299 {
1300 struct usb_serial_port *port = tty->driver_data;
1301 struct usb_serial *serial = get_usb_serial(port, __func__);
1302 struct quatech_port *qt_port;
1303 u16 index, onoff;
1304 unsigned int result;
1305
1306 index = tty->index - serial->minor;
1307
1308 qt_port = qt_get_port_private(port);
1309
1310 if (break_state == -1)
1311 onoff = 1;
1312 else
1313 onoff = 0;
1314
1315 mutex_lock(&qt_port->lock);
1316
1317 result =
1318 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
1319 QT_BREAK_CONTROL, 0x40, onoff, index, NULL, 0, 300);
1320
1321 mutex_unlock(&qt_port->lock);
1322 }
1323
1324 static inline int qt_real_tiocmget(struct tty_struct *tty,
1325 struct usb_serial_port *port,
1326 struct usb_serial *serial)
1327 {
1328
1329 u8 mcr;
1330 u8 msr;
1331 unsigned int result = 0;
1332 int status;
1333 unsigned int index;
1334
1335 index = tty->index - serial->minor;
1336 status =
1337 BoxGetRegister(port->serial, index, MODEM_CONTROL_REGISTER, &mcr);
1338 if (status >= 0) {
1339 status =
1340 BoxGetRegister(port->serial, index,
1341 MODEM_STATUS_REGISTER, &msr);
1342
1343 }
1344
1345 if (status >= 0) {
1346 result = ((mcr & SERIAL_MCR_DTR) ? TIOCM_DTR : 0)
1347 /* DTR IS SET */
1348 | ((mcr & SERIAL_MCR_RTS) ? TIOCM_RTS : 0)
1349 /* RTS IS SET */
1350 | ((msr & SERIAL_MSR_CTS) ? TIOCM_CTS : 0)
1351 /* CTS is set */
1352 | ((msr & SERIAL_MSR_CD) ? TIOCM_CAR : 0)
1353 /* Carrier detect is set */
1354 | ((msr & SERIAL_MSR_RI) ? TIOCM_RI : 0)
1355 /* Ring indicator set */
1356 | ((msr & SERIAL_MSR_DSR) ? TIOCM_DSR : 0);
1357 /* DSR is set */
1358 return result;
1359
1360 } else
1361 return -ESPIPE;
1362 }
1363
1364 static inline int qt_real_tiocmset(struct tty_struct *tty,
1365 struct usb_serial_port *port,
1366 struct usb_serial *serial,
1367 unsigned int value)
1368 {
1369
1370 u8 mcr;
1371 int status;
1372 unsigned int index;
1373
1374 index = tty->index - serial->minor;
1375 status =
1376 BoxGetRegister(port->serial, index, MODEM_CONTROL_REGISTER, &mcr);
1377 if (status < 0)
1378 return -ESPIPE;
1379
1380 /*
1381 * Turn off the RTS and DTR and loopback and then only turn on what was
1382 * asked for
1383 */
1384 mcr &= ~(SERIAL_MCR_RTS | SERIAL_MCR_DTR | SERIAL_MCR_LOOP);
1385 if (value & TIOCM_RTS)
1386 mcr |= SERIAL_MCR_RTS;
1387 if (value & TIOCM_DTR)
1388 mcr |= SERIAL_MCR_DTR;
1389 if (value & TIOCM_LOOP)
1390 mcr |= SERIAL_MCR_LOOP;
1391
1392 status =
1393 BoxSetRegister(port->serial, index, MODEM_CONTROL_REGISTER, mcr);
1394 if (status < 0)
1395 return -ESPIPE;
1396 else
1397 return 0;
1398 }
1399
1400 static int qt_tiocmget(struct tty_struct *tty)
1401 {
1402 struct usb_serial_port *port = tty->driver_data;
1403 struct usb_serial *serial = get_usb_serial(port, __func__);
1404 struct quatech_port *qt_port = qt_get_port_private(port);
1405 int retval;
1406
1407 if (!serial)
1408 return -ENODEV;
1409
1410 mutex_lock(&qt_port->lock);
1411 retval = qt_real_tiocmget(tty, port, serial);
1412 mutex_unlock(&qt_port->lock);
1413 return retval;
1414 }
1415
1416 static int qt_tiocmset(struct tty_struct *tty,
1417 unsigned int set, unsigned int clear)
1418 {
1419
1420 struct usb_serial_port *port = tty->driver_data;
1421 struct usb_serial *serial = get_usb_serial(port, __func__);
1422 struct quatech_port *qt_port = qt_get_port_private(port);
1423 int retval;
1424
1425 if (!serial)
1426 return -ENODEV;
1427
1428 mutex_lock(&qt_port->lock);
1429 retval = qt_real_tiocmset(tty, port, serial, set);
1430 mutex_unlock(&qt_port->lock);
1431 return retval;
1432 }
1433
1434 static void qt_throttle(struct tty_struct *tty)
1435 {
1436 struct usb_serial_port *port = tty->driver_data;
1437 struct usb_serial *serial = get_usb_serial(port, __func__);
1438 struct quatech_port *qt_port;
1439
1440 if (!serial)
1441 return;
1442
1443 qt_port = qt_get_port_private(port);
1444
1445 mutex_lock(&qt_port->lock);
1446
1447 /* pass on to the driver specific version of this function */
1448 qt_port->RxHolding = 1;
1449
1450 mutex_unlock(&qt_port->lock);
1451 }
1452
1453 static void qt_submit_urb_from_unthrottle(struct usb_serial_port *port,
1454 struct usb_serial *serial)
1455 {
1456 int result;
1457
1458 /* Start reading from the device */
1459 usb_fill_bulk_urb(port->read_urb, serial->dev,
1460 usb_rcvbulkpipe(serial->dev,
1461 port->bulk_in_endpointAddress),
1462 port->read_urb->transfer_buffer,
1463 port->read_urb->transfer_buffer_length,
1464 qt_read_bulk_callback, port);
1465
1466 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
1467
1468 if (result)
1469 dev_err(&port->dev,
1470 "%s - failed restarting read urb, error %d\n",
1471 __func__, result);
1472 }
1473
1474 static void qt_unthrottle(struct tty_struct *tty)
1475 {
1476 struct usb_serial_port *port = tty->driver_data;
1477 struct usb_serial *serial = get_usb_serial(port, __func__);
1478 struct quatech_port *qt_port;
1479
1480 if (!serial)
1481 return;
1482
1483 qt_port = qt_get_port_private(port);
1484
1485 mutex_lock(&qt_port->lock);
1486
1487 if (qt_port->RxHolding == 1) {
1488 dev_dbg(&port->dev, "%s -qt_port->RxHolding == 1\n", __func__);
1489
1490 qt_port->RxHolding = 0;
1491 dev_dbg(&port->dev, "%s - qt_port->RxHolding = 0\n", __func__);
1492
1493 /* if we have a bulk endpoint, start it up */
1494 if ((serial->num_bulk_in) && (qt_port->ReadBulkStopped == 1))
1495 qt_submit_urb_from_unthrottle(port, serial);
1496 }
1497 mutex_unlock(&qt_port->lock);
1498 }
1499
1500 static int qt_calc_num_ports(struct usb_serial *serial)
1501 {
1502 int num_ports;
1503
1504 num_ports =
1505 (serial->interface->cur_altsetting->desc.bNumEndpoints - 1) / 2;
1506
1507 return num_ports;
1508 }
1509
1510 static struct usb_serial_driver quatech_device = {
1511 .driver = {
1512 .owner = THIS_MODULE,
1513 .name = "serqt",
1514 },
1515 .description = DRIVER_DESC,
1516 .id_table = id_table,
1517 .num_ports = 8,
1518 .open = qt_open,
1519 .close = qt_close,
1520 .write = qt_write,
1521 .write_room = qt_write_room,
1522 .chars_in_buffer = qt_chars_in_buffer,
1523 .throttle = qt_throttle,
1524 .unthrottle = qt_unthrottle,
1525 .calc_num_ports = qt_calc_num_ports,
1526 .ioctl = qt_ioctl,
1527 .set_termios = qt_set_termios,
1528 .break_ctl = qt_break,
1529 .tiocmget = qt_tiocmget,
1530 .tiocmset = qt_tiocmset,
1531 .attach = qt_startup,
1532 .release = qt_release,
1533 };
1534
1535 static struct usb_serial_driver * const serial_drivers[] = {
1536 &quatech_device, NULL
1537 };
1538
1539 module_usb_serial_driver(serial_drivers, id_table);
1540
1541 MODULE_AUTHOR(DRIVER_AUTHOR);
1542 MODULE_DESCRIPTION(DRIVER_DESC);
1543 MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)