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Merge git://git.infradead.org/users/willy/linux-nvme
[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 static bool debug;
20
21 /* Version Information */
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 /* Quatech VID */
27 #define QUATECH_SSU200 0xC030 /* SSU200 */
28 #define QUATECH_DSU100 0xC040 /* DSU100 */
29 #define QUATECH_DSU200 0xC050 /* DSU200 */
30 #define QUATECH_QSU100 0xC060 /* QSU100 */
31 #define QUATECH_QSU200 0xC070 /* QSU200 */
32 #define QUATECH_ESU100A 0xC080 /* ESU100A */
33 #define QUATECH_ESU100B 0xC081 /* ESU100B */
34 #define QUATECH_ESU200A 0xC0A0 /* ESU200A */
35 #define QUATECH_ESU200B 0xC0A1 /* ESU200B */
36 #define QUATECH_HSU100A 0xC090 /* HSU100A */
37 #define QUATECH_HSU100B 0xC091 /* HSU100B */
38 #define QUATECH_HSU100C 0xC092 /* HSU100C */
39 #define QUATECH_HSU100D 0xC093 /* HSU100D */
40 #define QUATECH_HSU200A 0xC0B0 /* HSU200A */
41 #define QUATECH_HSU200B 0xC0B1 /* HSU200B */
42 #define QUATECH_HSU200C 0xC0B2 /* HSU200C */
43 #define QUATECH_HSU200D 0xC0B3 /* HSU200D */
44
45 #define QT_SET_GET_DEVICE 0xc2
46 #define QT_OPEN_CLOSE_CHANNEL 0xca
47 #define QT_GET_SET_PREBUF_TRIG_LVL 0xcc
48 #define QT_SET_ATF 0xcd
49 #define QT_GET_SET_REGISTER 0xc0
50 #define QT_GET_SET_UART 0xc1
51 #define QT_HW_FLOW_CONTROL_MASK 0xc5
52 #define QT_SW_FLOW_CONTROL_MASK 0xc6
53 #define QT_SW_FLOW_CONTROL_DISABLE 0xc7
54 #define QT_BREAK_CONTROL 0xc8
55
56 #define USBD_TRANSFER_DIRECTION_IN 0xc0
57 #define USBD_TRANSFER_DIRECTION_OUT 0x40
58
59 #define MAX_BAUD_RATE 460800
60 #define MAX_BAUD_REMAINDER 4608
61
62 #define DIV_LATCH_LS 0x00
63 #define XMT_HOLD_REGISTER 0x00
64 #define XVR_BUFFER_REGISTER 0x00
65 #define DIV_LATCH_MS 0x01
66 #define FIFO_CONTROL_REGISTER 0x02
67 #define LINE_CONTROL_REGISTER 0x03
68 #define MODEM_CONTROL_REGISTER 0x04
69 #define LINE_STATUS_REGISTER 0x05
70 #define MODEM_STATUS_REGISTER 0x06
71
72 #define SERIAL_MCR_DTR 0x01
73 #define SERIAL_MCR_RTS 0x02
74 #define SERIAL_MCR_LOOP 0x10
75
76 #define SERIAL_MSR_CTS 0x10
77 #define SERIAL_MSR_CD 0x80
78 #define SERIAL_MSR_RI 0x40
79 #define SERIAL_MSR_DSR 0x20
80 #define SERIAL_MSR_MASK 0xf0
81
82 #define SERIAL_8_DATA 0x03
83 #define SERIAL_7_DATA 0x02
84 #define SERIAL_6_DATA 0x01
85 #define SERIAL_5_DATA 0x00
86
87 #define SERIAL_ODD_PARITY 0X08
88 #define SERIAL_EVEN_PARITY 0X18
89 #define SERIAL_TWO_STOPB 0x04
90 #define SERIAL_ONE_STOPB 0x00
91
92 #define DEFAULT_DIVISOR 0x30 /* gives 9600 baud rate */
93 #define DEFAULT_LCR SERIAL_8_DATA /* 8, none , 1 */
94
95 #define FULLPWRBIT 0x00000080
96 #define NEXT_BOARD_POWER_BIT 0x00000004
97
98 #define SERIAL_LSR_OE 0x02
99 #define SERIAL_LSR_PE 0x04
100 #define SERIAL_LSR_FE 0x08
101 #define SERIAL_LSR_BI 0x10
102
103 #define SERIAL_MSR_CTS 0x10
104 #define SERIAL_MSR_CD 0x80
105 #define SERIAL_MSR_RI 0x40
106 #define SERIAL_MSR_DSR 0x20
107 #define SERIAL_MSR_MASK 0xf0
108
109 #define PREFUFF_LEVEL_CONSERVATIVE 128
110 #define ATC_DISABLED 0x0
111
112 #define RR_BITS 0x03 /* for clearing clock bits */
113 #define DUPMODE_BITS 0xc0
114 #define CLKS_X4 0x02
115
116 #define LOOPMODE_BITS 0x41 /* LOOP1 = b6, LOOP0 = b0 (PORT B) */
117 #define ALL_LOOPBACK 0x01
118 #define MODEM_CTRL 0x40
119 #define RS232_MODE 0x00
120
121 static const struct usb_device_id id_table[] = {
122 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU200)},
123 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU100)},
124 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU200)},
125 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU100)},
126 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU200)},
127 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU100A)},
128 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU100B)},
129 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU200A)},
130 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU200B)},
131 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU100A)},
132 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU100B)},
133 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU100C)},
134 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU100D)},
135 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU200A)},
136 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU200B)},
137 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU200C)},
138 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU200D)},
139 {} /* Terminating entry */
140 };
141 MODULE_DEVICE_TABLE(usb, id_table);
142
143 struct qt_get_device_data {
144 __u8 porta;
145 __u8 portb;
146 __u8 portc;
147 };
148
149 struct qt_open_channel_data {
150 __u8 line_status;
151 __u8 modem_status;
152 };
153
154 struct quatech_port {
155 int port_num; /* number of the port */
156 struct urb *write_urb; /* write URB for this port */
157 struct urb *read_urb; /* read URB for this port */
158 struct urb *int_urb;
159
160 __u8 shadowLCR; /* last LCR value received */
161 __u8 shadowMCR; /* last MCR value received */
162 __u8 shadowMSR; /* last MSR value received */
163 __u8 shadowLSR; /* last LSR value received */
164 char open_ports;
165
166 /* Used for TIOCMIWAIT */
167 wait_queue_head_t msr_wait;
168 char prev_status, diff_status;
169
170 wait_queue_head_t wait;
171
172 struct async_icount icount;
173
174 struct usb_serial_port *port; /* owner of this object */
175 struct qt_get_device_data DeviceData;
176 struct mutex lock;
177 bool read_urb_busy;
178 int RxHolding;
179 int ReadBulkStopped;
180 char closePending;
181 };
182
183 static int port_paranoia_check(struct usb_serial_port *port,
184 const char *function)
185 {
186 if (!port) {
187 dbg("%s - port == NULL", function);
188 return -1;
189 }
190 if (!port->serial) {
191 dbg("%s - port->serial == NULL\n", function);
192 return -1;
193 }
194
195 return 0;
196 }
197
198 static int serial_paranoia_check(struct usb_serial *serial,
199 const char *function)
200 {
201 if (!serial) {
202 dbg("%s - serial == NULL\n", function);
203 return -1;
204 }
205
206 if (!serial->type) {
207 dbg("%s - serial->type == NULL!", function);
208 return -1;
209 }
210
211 return 0;
212 }
213
214 static inline struct quatech_port *qt_get_port_private(struct usb_serial_port
215 *port)
216 {
217 return (struct quatech_port *)usb_get_serial_port_data(port);
218 }
219
220 static inline void qt_set_port_private(struct usb_serial_port *port,
221 struct quatech_port *data)
222 {
223 usb_set_serial_port_data(port, (void *)data);
224 }
225
226 static struct usb_serial *get_usb_serial(struct usb_serial_port *port,
227 const char *function)
228 {
229 /* if no port was specified, or it fails a paranoia check */
230 if (!port ||
231 port_paranoia_check(port, function) ||
232 serial_paranoia_check(port->serial, function)) {
233 /*
234 * then say that we dont have a valid usb_serial thing,
235 * which will end up genrating -ENODEV return values
236 */
237 return NULL;
238 }
239
240 return port->serial;
241 }
242
243 static void ProcessLineStatus(struct quatech_port *qt_port,
244 unsigned char line_status)
245 {
246
247 qt_port->shadowLSR =
248 line_status & (SERIAL_LSR_OE | SERIAL_LSR_PE | SERIAL_LSR_FE |
249 SERIAL_LSR_BI);
250 return;
251 }
252
253 static void ProcessModemStatus(struct quatech_port *qt_port,
254 unsigned char modem_status)
255 {
256
257 qt_port->shadowMSR = modem_status;
258 wake_up_interruptible(&qt_port->wait);
259 return;
260 }
261
262 static void ProcessRxChar(struct tty_struct *tty, struct usb_serial_port *port,
263 unsigned char data)
264 {
265 struct urb *urb = port->read_urb;
266 if (urb->actual_length)
267 tty_insert_flip_char(tty, data, TTY_NORMAL);
268 }
269
270 static void qt_write_bulk_callback(struct urb *urb)
271 {
272 struct tty_struct *tty;
273 int status;
274 struct quatech_port *quatech_port;
275
276 status = urb->status;
277
278 if (status) {
279 dbg("nonzero write bulk status received:%d\n", status);
280 return;
281 }
282
283 quatech_port = urb->context;
284
285 tty = tty_port_tty_get(&quatech_port->port->port);
286
287 if (tty)
288 tty_wakeup(tty);
289 tty_kref_put(tty);
290 }
291
292 static void qt_interrupt_callback(struct urb *urb)
293 {
294 /* FIXME */
295 }
296
297 static void qt_read_bulk_callback(struct urb *urb)
298 {
299
300 struct usb_serial_port *port = urb->context;
301 struct usb_serial *serial = get_usb_serial(port, __func__);
302 struct quatech_port *qt_port = qt_get_port_private(port);
303 unsigned char *data;
304 struct tty_struct *tty;
305 unsigned int index;
306 unsigned int RxCount;
307 int i, result;
308 int flag, flag_data;
309
310 if (urb->status) {
311 qt_port->ReadBulkStopped = 1;
312 dbg("%s - nonzero write bulk status received: %d\n",
313 __func__, urb->status);
314 return;
315 }
316
317 tty = tty_port_tty_get(&port->port);
318 if (!tty) {
319 dbg("%s - bad tty pointer - exiting", __func__);
320 return;
321 }
322
323 data = urb->transfer_buffer;
324
325 RxCount = urb->actual_length;
326
327 /* index = MINOR(port->tty->device) - serial->minor; */
328 index = tty->index - serial->minor;
329
330 dbg("%s - port->RxHolding = %d\n", __func__, qt_port->RxHolding);
331
332 if (port_paranoia_check(port, __func__) != 0) {
333 dbg("%s - port_paranoia_check, exiting\n", __func__);
334 qt_port->ReadBulkStopped = 1;
335 goto exit;
336 }
337
338 if (!serial) {
339 dbg("%s - bad serial pointer, exiting\n", __func__);
340 goto exit;
341 }
342 if (qt_port->closePending == 1) {
343 /* Were closing , stop reading */
344 dbg("%s - (qt_port->closepending == 1\n", __func__);
345 qt_port->ReadBulkStopped = 1;
346 goto exit;
347 }
348
349 /*
350 * RxHolding is asserted by throttle, if we assert it, we're not
351 * receiving any more characters and let the box handle the flow
352 * control
353 */
354 if (qt_port->RxHolding == 1) {
355 qt_port->ReadBulkStopped = 1;
356 goto exit;
357 }
358
359 if (urb->status) {
360 qt_port->ReadBulkStopped = 1;
361
362 dbg("%s - nonzero read bulk status received: %d\n",
363 __func__, urb->status);
364 goto exit;
365 }
366
367 if (tty && RxCount) {
368 flag_data = 0;
369 for (i = 0; i < RxCount; ++i) {
370 /* Look ahead code here */
371 if ((i <= (RxCount - 3)) && (data[i] == 0x1b)
372 && (data[i + 1] == 0x1b)) {
373 flag = 0;
374 switch (data[i + 2]) {
375 case 0x00:
376 /* line status change 4th byte must follow */
377 if (i > (RxCount - 4)) {
378 dbg("Illegal escape seuences in received data\n");
379 break;
380 }
381 ProcessLineStatus(qt_port, data[i + 3]);
382 i += 3;
383 flag = 1;
384 break;
385
386 case 0x01:
387 /* Modem status status change 4th byte must follow */
388 dbg("Modem status status.\n");
389 if (i > (RxCount - 4)) {
390 dbg("Illegal escape sequences in received data\n");
391 break;
392 }
393 ProcessModemStatus(qt_port,
394 data[i + 3]);
395 i += 3;
396 flag = 1;
397 break;
398 case 0xff:
399 dbg("No status sequence.\n");
400
401 if (tty) {
402 ProcessRxChar(tty, port, data[i]);
403 ProcessRxChar(tty, port, data[i + 1]);
404 }
405 i += 2;
406 break;
407 }
408 if (flag == 1)
409 continue;
410 }
411
412 if (tty && urb->actual_length)
413 tty_insert_flip_char(tty, data[i], TTY_NORMAL);
414
415 }
416 tty_flip_buffer_push(tty);
417 }
418
419 /* Continue trying to always read */
420 usb_fill_bulk_urb(port->read_urb, serial->dev,
421 usb_rcvbulkpipe(serial->dev,
422 port->bulk_in_endpointAddress),
423 port->read_urb->transfer_buffer,
424 port->read_urb->transfer_buffer_length,
425 qt_read_bulk_callback, port);
426 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
427 if (result)
428 dbg("%s - failed resubmitting read urb, error %d",
429 __func__, result);
430 else {
431 if (tty && RxCount) {
432 tty_flip_buffer_push(tty);
433 tty_schedule_flip(tty);
434 }
435 }
436
437 schedule_work(&port->work);
438 exit:
439 tty_kref_put(tty);
440 }
441
442 /*
443 * qt_get_device
444 * Issue a GET_DEVICE vendor-specific request on the default control pipe If
445 * successful, fills in the qt_get_device_data structure pointed to by
446 * device_data, otherwise return a negative error number of the problem.
447 */
448
449 static int qt_get_device(struct usb_serial *serial,
450 struct qt_get_device_data *device_data)
451 {
452 int result;
453 unsigned char *transfer_buffer;
454
455 transfer_buffer =
456 kmalloc(sizeof(struct qt_get_device_data), GFP_KERNEL);
457 if (!transfer_buffer)
458 return -ENOMEM;
459
460 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
461 QT_SET_GET_DEVICE, 0xc0, 0, 0,
462 transfer_buffer,
463 sizeof(struct qt_get_device_data), 300);
464 if (result > 0)
465 memcpy(device_data, transfer_buffer,
466 sizeof(struct qt_get_device_data));
467 kfree(transfer_buffer);
468
469 return result;
470 }
471
472 /****************************************************************************
473 * BoxSetPrebufferLevel
474 TELLS BOX WHEN TO ASSERT FLOW CONTROL
475 ****************************************************************************/
476 static int BoxSetPrebufferLevel(struct usb_serial *serial)
477 {
478 int result;
479 __u16 buffer_length;
480
481 buffer_length = PREFUFF_LEVEL_CONSERVATIVE;
482 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
483 QT_GET_SET_PREBUF_TRIG_LVL, 0x40,
484 buffer_length, 0, NULL, 0, 300);
485 return result;
486 }
487
488 /****************************************************************************
489 * BoxSetATC
490 TELLS BOX WHEN TO ASSERT automatic transmitter control
491 ****************************************************************************/
492 static int BoxSetATC(struct usb_serial *serial, __u16 n_Mode)
493 {
494 int result;
495 __u16 buffer_length;
496
497 buffer_length = PREFUFF_LEVEL_CONSERVATIVE;
498
499 result =
500 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
501 QT_SET_ATF, 0x40, n_Mode, 0, NULL, 0, 300);
502
503 return result;
504 }
505
506 /**
507 * qt_set_device
508 * Issue a SET_DEVICE vendor-specific request on the default control pipe If
509 * successful returns the number of bytes written, otherwise it returns a
510 * negative error number of the problem.
511 */
512 static int qt_set_device(struct usb_serial *serial,
513 struct qt_get_device_data *device_data)
514 {
515 int result;
516 __u16 length;
517 __u16 PortSettings;
518
519 PortSettings = ((__u16) (device_data->portb));
520 PortSettings = (PortSettings << 8);
521 PortSettings += ((__u16) (device_data->porta));
522
523 length = sizeof(struct qt_get_device_data);
524 dbg("%s - PortSettings = 0x%x\n", __func__, PortSettings);
525
526 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
527 QT_SET_GET_DEVICE, 0x40, PortSettings,
528 0, NULL, 0, 300);
529 return result;
530 }
531
532 static int qt_open_channel(struct usb_serial *serial, __u16 Uart_Number,
533 struct qt_open_channel_data *pDeviceData)
534 {
535 int result;
536
537 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
538 QT_OPEN_CLOSE_CHANNEL,
539 USBD_TRANSFER_DIRECTION_IN, 1, Uart_Number,
540 pDeviceData,
541 sizeof(struct qt_open_channel_data), 300);
542
543 return result;
544
545 }
546
547 static int qt_close_channel(struct usb_serial *serial, __u16 Uart_Number)
548 {
549 int result;
550
551 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
552 QT_OPEN_CLOSE_CHANNEL,
553 USBD_TRANSFER_DIRECTION_OUT, 0, Uart_Number,
554 NULL, 0, 300);
555
556 return result;
557
558 }
559
560 /****************************************************************************
561 * BoxGetRegister
562 * issuse a GET_REGISTER vendor-spcific request on the default control pipe
563 * If successful, fills in the pValue with the register value asked for
564 ****************************************************************************/
565 static int BoxGetRegister(struct usb_serial *serial, unsigned short Uart_Number,
566 unsigned short Register_Num, __u8 *pValue)
567 {
568 int result;
569 __u16 current_length;
570
571 current_length = sizeof(struct qt_get_device_data);
572
573 result =
574 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
575 QT_GET_SET_REGISTER, 0xC0, Register_Num,
576 Uart_Number, (void *)pValue, sizeof(*pValue), 300);
577
578 return result;
579 }
580
581 /****************************************************************************
582 * BoxSetRegister
583 * issuse a GET_REGISTER vendor-spcific request on the default control pipe
584 * If successful, fills in the pValue with the register value asked for
585 ****************************************************************************/
586 static int BoxSetRegister(struct usb_serial *serial, unsigned short Uart_Number,
587 unsigned short Register_Num, unsigned short Value)
588 {
589 int result;
590 unsigned short RegAndByte;
591
592 RegAndByte = Value;
593 RegAndByte = RegAndByte << 8;
594 RegAndByte = RegAndByte + Register_Num;
595
596 /*
597 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
598 QT_GET_SET_REGISTER, 0xC0, Register_Num,
599 Uart_Number, NULL, 0, 300);
600 */
601
602 result =
603 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
604 QT_GET_SET_REGISTER, 0x40, RegAndByte, Uart_Number,
605 NULL, 0, 300);
606
607 return result;
608 }
609
610 /*
611 * qt_setuart
612 * issues a SET_UART vendor-specific request on the default control pipe
613 * If successful sets baud rate divisor and LCR value
614 */
615 static int qt_setuart(struct usb_serial *serial, unsigned short Uart_Number,
616 unsigned short default_divisor, unsigned char default_LCR)
617 {
618 int result;
619 unsigned short UartNumandLCR;
620
621 UartNumandLCR = (default_LCR << 8) + Uart_Number;
622
623 result =
624 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
625 QT_GET_SET_UART, 0x40, default_divisor,
626 UartNumandLCR, NULL, 0, 300);
627
628 return result;
629 }
630
631 static int BoxSetHW_FlowCtrl(struct usb_serial *serial, unsigned int index,
632 int bSet)
633 {
634 __u8 mcr = 0;
635 __u8 msr = 0, MOUT_Value = 0;
636 unsigned int status;
637
638 if (bSet == 1) {
639 /* flow control, box will clear RTS line to prevent remote */
640 mcr = SERIAL_MCR_RTS;
641 } /* device from xmitting more chars */
642 else {
643 /* no flow control to remote device */
644 mcr = 0;
645
646 }
647 MOUT_Value = mcr << 8;
648
649 if (bSet == 1) {
650 /* flow control, box will inhibit xmit data if CTS line is
651 * asserted */
652 msr = SERIAL_MSR_CTS;
653 } else {
654 /* Box will not inhimbe xmit data due to CTS line */
655 msr = 0;
656 }
657 MOUT_Value |= msr;
658
659 status =
660 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
661 QT_HW_FLOW_CONTROL_MASK, 0x40, MOUT_Value,
662 index, NULL, 0, 300);
663 return status;
664
665 }
666
667 static int BoxSetSW_FlowCtrl(struct usb_serial *serial, __u16 index,
668 unsigned char stop_char, unsigned char start_char)
669 {
670 __u16 nSWflowout;
671 int result;
672
673 nSWflowout = start_char << 8;
674 nSWflowout = (unsigned short)stop_char;
675
676 result =
677 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
678 QT_SW_FLOW_CONTROL_MASK, 0x40, nSWflowout,
679 index, NULL, 0, 300);
680 return result;
681
682 }
683
684 static int BoxDisable_SW_FlowCtrl(struct usb_serial *serial, __u16 index)
685 {
686 int result;
687
688 result =
689 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
690 QT_SW_FLOW_CONTROL_DISABLE, 0x40, 0, index,
691 NULL, 0, 300);
692 return result;
693
694 }
695
696 static int qt_startup(struct usb_serial *serial)
697 {
698 struct usb_serial_port *port;
699 struct quatech_port *qt_port;
700 struct qt_get_device_data DeviceData;
701 int i;
702 int status;
703
704 /* Now setup per port private data */
705 for (i = 0; i < serial->num_ports; i++) {
706 port = serial->port[i];
707 qt_port = kzalloc(sizeof(*qt_port), GFP_KERNEL);
708 if (!qt_port) {
709 dbg("%s: kmalloc for quatech_port (%d) failed!.",
710 __func__, i);
711 for (--i; i >= 0; i--) {
712 port = serial->port[i];
713 kfree(usb_get_serial_port_data(port));
714 usb_set_serial_port_data(port, NULL);
715 }
716 return -ENOMEM;
717 }
718 mutex_init(&qt_port->lock);
719
720 usb_set_serial_port_data(port, qt_port);
721
722 }
723
724 status = qt_get_device(serial, &DeviceData);
725 if (status < 0) {
726 dbg(__FILE__ "box_get_device failed");
727 goto startup_error;
728 }
729
730 dbg(__FILE__ "DeviceData.portb = 0x%x", DeviceData.portb);
731
732 DeviceData.portb &= ~FULLPWRBIT;
733 dbg(__FILE__ "Changing DeviceData.portb to 0x%x", DeviceData.portb);
734
735 status = qt_set_device(serial, &DeviceData);
736 if (status < 0) {
737 dbg(__FILE__ "qt_set_device failed\n");
738 goto startup_error;
739 }
740
741 status = qt_get_device(serial, &DeviceData);
742 if (status < 0) {
743 dbg(__FILE__ "qt_get_device failed");
744 goto startup_error;
745 }
746
747 switch (serial->dev->descriptor.idProduct) {
748 case QUATECH_DSU100:
749 case QUATECH_QSU100:
750 case QUATECH_ESU100A:
751 case QUATECH_ESU100B:
752 case QUATECH_HSU100A:
753 case QUATECH_HSU100B:
754 case QUATECH_HSU100C:
755 case QUATECH_HSU100D:
756 DeviceData.porta &= ~(RR_BITS | DUPMODE_BITS);
757 DeviceData.porta |= CLKS_X4;
758 DeviceData.portb &= ~(LOOPMODE_BITS);
759 DeviceData.portb |= RS232_MODE;
760 break;
761
762 case QUATECH_SSU200:
763 case QUATECH_DSU200:
764 case QUATECH_QSU200:
765 case QUATECH_ESU200A:
766 case QUATECH_ESU200B:
767 case QUATECH_HSU200A:
768 case QUATECH_HSU200B:
769 case QUATECH_HSU200C:
770 case QUATECH_HSU200D:
771 DeviceData.porta &= ~(RR_BITS | DUPMODE_BITS);
772 DeviceData.porta |= CLKS_X4;
773 DeviceData.portb &= ~(LOOPMODE_BITS);
774 DeviceData.portb |= ALL_LOOPBACK;
775 break;
776 default:
777 DeviceData.porta &= ~(RR_BITS | DUPMODE_BITS);
778 DeviceData.porta |= CLKS_X4;
779 DeviceData.portb &= ~(LOOPMODE_BITS);
780 DeviceData.portb |= RS232_MODE;
781 break;
782
783 }
784
785 status = BoxSetPrebufferLevel(serial); /* sets to default value */
786 if (status < 0) {
787 dbg(__FILE__ "BoxSetPrebufferLevel failed\n");
788 goto startup_error;
789 }
790
791 status = BoxSetATC(serial, ATC_DISABLED);
792 if (status < 0) {
793 dbg(__FILE__ "BoxSetATC failed\n");
794 goto startup_error;
795 }
796
797 dbg(__FILE__ "DeviceData.portb = 0x%x", DeviceData.portb);
798
799 DeviceData.portb |= NEXT_BOARD_POWER_BIT;
800 dbg(__FILE__ "Changing DeviceData.portb to 0x%x", DeviceData.portb);
801
802 status = qt_set_device(serial, &DeviceData);
803 if (status < 0) {
804 dbg(__FILE__ "qt_set_device failed\n");
805 goto startup_error;
806 }
807
808 dbg("Exit Success %s\n", __func__);
809
810 return 0;
811
812 startup_error:
813 for (i = 0; i < serial->num_ports; i++) {
814 port = serial->port[i];
815 qt_port = qt_get_port_private(port);
816 kfree(qt_port);
817 usb_set_serial_port_data(port, NULL);
818 }
819
820 dbg("Exit fail %s\n", __func__);
821
822 return -EIO;
823 }
824
825 static void qt_release(struct usb_serial *serial)
826 {
827 struct usb_serial_port *port;
828 struct quatech_port *qt_port;
829 int i;
830
831 for (i = 0; i < serial->num_ports; i++) {
832 port = serial->port[i];
833 if (!port)
834 continue;
835
836 qt_port = usb_get_serial_port_data(port);
837 kfree(qt_port);
838 usb_set_serial_port_data(port, NULL);
839 }
840
841 }
842
843 static int qt_open(struct tty_struct *tty,
844 struct usb_serial_port *port)
845 {
846 struct usb_serial *serial;
847 struct quatech_port *quatech_port;
848 struct quatech_port *port0;
849 struct qt_open_channel_data ChannelData;
850
851 int result;
852
853 if (port_paranoia_check(port, __func__))
854 return -ENODEV;
855
856 serial = port->serial;
857
858 if (serial_paranoia_check(serial, __func__))
859 return -ENODEV;
860
861 quatech_port = qt_get_port_private(port);
862 port0 = qt_get_port_private(serial->port[0]);
863
864 if (quatech_port == NULL || port0 == NULL)
865 return -ENODEV;
866
867 usb_clear_halt(serial->dev, port->write_urb->pipe);
868 usb_clear_halt(serial->dev, port->read_urb->pipe);
869 port0->open_ports++;
870
871 result = qt_get_device(serial, &port0->DeviceData);
872
873 /* Port specific setups */
874 result = qt_open_channel(serial, port->number, &ChannelData);
875 if (result < 0) {
876 dbg(__FILE__ "qt_open_channel failed\n");
877 return result;
878 }
879 dbg(__FILE__ "qt_open_channel completed.\n");
880
881 /* FIXME: are these needed? Does it even do anything useful? */
882 quatech_port->shadowLSR = ChannelData.line_status &
883 (SERIAL_LSR_OE | SERIAL_LSR_PE | SERIAL_LSR_FE | SERIAL_LSR_BI);
884
885 quatech_port->shadowMSR = ChannelData.modem_status &
886 (SERIAL_MSR_CTS | SERIAL_MSR_DSR | SERIAL_MSR_RI | SERIAL_MSR_CD);
887
888 /* Set Baud rate to default and turn off (default)flow control here */
889 result = qt_setuart(serial, port->number, DEFAULT_DIVISOR, DEFAULT_LCR);
890 if (result < 0) {
891 dbg(__FILE__ "qt_setuart failed\n");
892 return result;
893 }
894 dbg(__FILE__ "qt_setuart completed.\n");
895
896 /*
897 * Put this here to make it responsive to stty and defaults set by
898 * the tty layer
899 */
900 /* FIXME: is this needed? */
901 /* qt_set_termios(tty, port, NULL); */
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 /* set up interrupt urb */
907 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
908 serial->dev,
909 usb_rcvintpipe(serial->dev,
910 serial->port[0]->interrupt_in_endpointAddress),
911 serial->port[0]->interrupt_in_buffer,
912 serial->port[0]->
913 interrupt_in_urb->transfer_buffer_length,
914 qt_interrupt_callback, serial,
915 serial->port[0]->
916 interrupt_in_urb->interval);
917
918 result =
919 usb_submit_urb(serial->port[0]->interrupt_in_urb,
920 GFP_KERNEL);
921 if (result) {
922 dev_err(&port->dev,
923 "%s - Error %d submitting "
924 "interrupt urb\n", __func__, result);
925 }
926
927 }
928
929 }
930
931 dbg("port number is %d\n", port->number);
932 dbg("serial number is %d\n", port->serial->minor);
933 dbg("Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
934 dbg("BulkOut endpoint is %d\n", port->bulk_out_endpointAddress);
935 dbg("Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress);
936 dbg("port's number in the device is %d\n", quatech_port->port_num);
937 quatech_port->read_urb = port->read_urb;
938
939 /* set up our bulk in urb */
940
941 usb_fill_bulk_urb(quatech_port->read_urb,
942 serial->dev,
943 usb_rcvbulkpipe(serial->dev,
944 port->bulk_in_endpointAddress),
945 port->bulk_in_buffer,
946 quatech_port->read_urb->transfer_buffer_length,
947 qt_read_bulk_callback, quatech_port);
948
949 dbg("qt_open: bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
950 quatech_port->read_urb_busy = true;
951 result = usb_submit_urb(quatech_port->read_urb, GFP_KERNEL);
952 if (result) {
953 dev_err(&port->dev,
954 "%s - Error %d submitting control urb\n",
955 __func__, result);
956 quatech_port->read_urb_busy = false;
957 }
958
959 /* initialize our wait queues */
960 init_waitqueue_head(&quatech_port->wait);
961 init_waitqueue_head(&quatech_port->msr_wait);
962
963 /* initialize our icount structure */
964 memset(&(quatech_port->icount), 0x00, sizeof(quatech_port->icount));
965
966 return 0;
967
968 }
969
970 static int qt_chars_in_buffer(struct tty_struct *tty)
971 {
972 struct usb_serial_port *port = tty->driver_data;
973 struct usb_serial *serial;
974 int chars = 0;
975
976 serial = get_usb_serial(port, __func__);
977
978 if (serial->num_bulk_out) {
979 if (port->write_urb->status == -EINPROGRESS)
980 chars = port->write_urb->transfer_buffer_length;
981 }
982
983 dbg("%s - returns %d\n", __func__, chars);
984
985 return chars;
986 }
987
988 static void qt_block_until_empty(struct tty_struct *tty,
989 struct quatech_port *qt_port)
990 {
991 int timeout = HZ / 10;
992 int wait = 30;
993 int count;
994
995 while (1) {
996
997 count = qt_chars_in_buffer(tty);
998
999 if (count <= 0)
1000 return;
1001
1002 interruptible_sleep_on_timeout(&qt_port->wait, timeout);
1003
1004 wait--;
1005 if (wait == 0) {
1006 dbg("%s - TIMEOUT", __func__);
1007 return;
1008 } else {
1009 wait = 30;
1010 }
1011 }
1012 }
1013
1014 static void qt_close(struct usb_serial_port *port)
1015 {
1016 struct usb_serial *serial = port->serial;
1017 struct quatech_port *qt_port;
1018 struct quatech_port *port0;
1019 struct tty_struct *tty;
1020 int status;
1021 unsigned int index;
1022 status = 0;
1023
1024 tty = tty_port_tty_get(&port->port);
1025 index = tty->index - serial->minor;
1026
1027 qt_port = qt_get_port_private(port);
1028 port0 = qt_get_port_private(serial->port[0]);
1029
1030 /* shutdown any bulk reads that might be going on */
1031 if (serial->num_bulk_out)
1032 usb_unlink_urb(port->write_urb);
1033 if (serial->num_bulk_in)
1034 usb_unlink_urb(port->read_urb);
1035
1036 /* wait up to for transmitter to empty */
1037 if (serial->dev)
1038 qt_block_until_empty(tty, qt_port);
1039 tty_kref_put(tty);
1040
1041 /* Close uart channel */
1042 status = qt_close_channel(serial, index);
1043 if (status < 0)
1044 dbg("%s - port %d qt_close_channel failed.\n",
1045 __func__, port->number);
1046
1047 port0->open_ports--;
1048
1049 dbg("qt_num_open_ports in close%d:in port%d\n",
1050 port0->open_ports, port->number);
1051
1052 if (port0->open_ports == 0) {
1053 if (serial->port[0]->interrupt_in_urb) {
1054 dbg("%s", "Shutdown interrupt_in_urb\n");
1055 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1056 }
1057
1058 }
1059
1060 if (qt_port->write_urb) {
1061 /* if this urb had a transfer buffer already (old tx) free it */
1062 kfree(qt_port->write_urb->transfer_buffer);
1063 usb_free_urb(qt_port->write_urb);
1064 }
1065
1066 }
1067
1068 static int qt_write(struct tty_struct *tty, struct usb_serial_port *port,
1069 const unsigned char *buf, int count)
1070 {
1071 int result;
1072 struct usb_serial *serial = get_usb_serial(port, __func__);
1073
1074 if (serial == NULL)
1075 return -ENODEV;
1076
1077 if (count == 0) {
1078 dbg("%s - write request of 0 bytes\n", __func__);
1079 return 0;
1080 }
1081
1082 /* only do something if we have a bulk out endpoint */
1083 if (serial->num_bulk_out) {
1084 if (port->write_urb->status == -EINPROGRESS) {
1085 dbg("%s - already writing\n", __func__);
1086 return 0;
1087 }
1088
1089 count =
1090 (count > port->bulk_out_size) ? port->bulk_out_size : count;
1091 memcpy(port->write_urb->transfer_buffer, buf, count);
1092
1093 /* set up our urb */
1094
1095 usb_fill_bulk_urb(port->write_urb, serial->dev,
1096 usb_sndbulkpipe(serial->dev,
1097 port->
1098 bulk_out_endpointAddress),
1099 port->write_urb->transfer_buffer, count,
1100 qt_write_bulk_callback, port);
1101
1102 /* send the data out the bulk port */
1103 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1104 if (result)
1105 dbg("%s - failed submitting write urb, error %d\n",
1106 __func__, result);
1107 else
1108 result = count;
1109
1110 return result;
1111 }
1112
1113 /* no bulk out, so return 0 bytes written */
1114 return 0;
1115 }
1116
1117 static int qt_write_room(struct tty_struct *tty)
1118 {
1119 struct usb_serial_port *port = tty->driver_data;
1120 struct usb_serial *serial;
1121 struct quatech_port *qt_port;
1122
1123 int retval = -EINVAL;
1124
1125 if (port_paranoia_check(port, __func__)) {
1126 dbg("%s", "Invalid port\n");
1127 return -1;
1128 }
1129
1130 serial = get_usb_serial(port, __func__);
1131
1132 if (!serial)
1133 return -ENODEV;
1134
1135 qt_port = qt_get_port_private(port);
1136
1137 mutex_lock(&qt_port->lock);
1138
1139 if (serial->num_bulk_out) {
1140 if (port->write_urb->status != -EINPROGRESS)
1141 retval = port->bulk_out_size;
1142 }
1143
1144 mutex_unlock(&qt_port->lock);
1145 return retval;
1146
1147 }
1148
1149 static int qt_ioctl(struct tty_struct *tty,
1150 unsigned int cmd, unsigned long arg)
1151 {
1152 struct usb_serial_port *port = tty->driver_data;
1153 struct quatech_port *qt_port = qt_get_port_private(port);
1154 struct usb_serial *serial = get_usb_serial(port, __func__);
1155 unsigned int index;
1156
1157 dbg("%s cmd 0x%04x", __func__, cmd);
1158
1159 index = tty->index - serial->minor;
1160
1161 if (cmd == TIOCMIWAIT) {
1162 while (qt_port != NULL) {
1163 interruptible_sleep_on(&qt_port->msr_wait);
1164 if (signal_pending(current))
1165 return -ERESTARTSYS;
1166 else {
1167 char diff = qt_port->diff_status;
1168
1169 if (diff == 0)
1170 return -EIO; /* no change => error */
1171
1172 /* Consume all events */
1173 qt_port->diff_status = 0;
1174
1175 if (((arg & TIOCM_RNG)
1176 && (diff & SERIAL_MSR_RI))
1177 || ((arg & TIOCM_DSR)
1178 && (diff & SERIAL_MSR_DSR))
1179 || ((arg & TIOCM_CD)
1180 && (diff & SERIAL_MSR_CD))
1181 || ((arg & TIOCM_CTS)
1182 && (diff & SERIAL_MSR_CTS))) {
1183 return 0;
1184 }
1185 }
1186 }
1187 return 0;
1188 }
1189
1190 dbg("%s -No ioctl for that one. port = %d\n", __func__, port->number);
1191 return -ENOIOCTLCMD;
1192 }
1193
1194 static void qt_set_termios(struct tty_struct *tty,
1195 struct usb_serial_port *port,
1196 struct ktermios *old_termios)
1197 {
1198 struct ktermios *termios = tty->termios;
1199 unsigned char new_LCR = 0;
1200 unsigned int cflag = termios->c_cflag;
1201 unsigned int index;
1202 int baud, divisor, remainder;
1203 int status;
1204
1205 index = tty->index - port->serial->minor;
1206
1207 switch (cflag) {
1208 case CS5:
1209 new_LCR |= SERIAL_5_DATA;
1210 break;
1211 case CS6:
1212 new_LCR |= SERIAL_6_DATA;
1213 break;
1214 case CS7:
1215 new_LCR |= SERIAL_7_DATA;
1216 break;
1217 default:
1218 case CS8:
1219 new_LCR |= SERIAL_8_DATA;
1220 break;
1221 }
1222
1223 /* Parity stuff */
1224 if (cflag & PARENB) {
1225 if (cflag & PARODD)
1226 new_LCR |= SERIAL_ODD_PARITY;
1227 else
1228 new_LCR |= SERIAL_EVEN_PARITY;
1229 }
1230 if (cflag & CSTOPB)
1231 new_LCR |= SERIAL_TWO_STOPB;
1232 else
1233 new_LCR |= SERIAL_ONE_STOPB;
1234
1235 dbg("%s - 4\n", __func__);
1236
1237 /* Thats the LCR stuff, go ahead and set it */
1238 baud = tty_get_baud_rate(tty);
1239 if (!baud)
1240 /* pick a default, any default... */
1241 baud = 9600;
1242
1243 dbg("%s - got baud = %d\n", __func__, baud);
1244
1245 divisor = MAX_BAUD_RATE / baud;
1246 remainder = MAX_BAUD_RATE % baud;
1247 /* Round to nearest divisor */
1248 if (((remainder * 2) >= baud) && (baud != 110))
1249 divisor++;
1250
1251 /*
1252 * Set Baud rate to default and turn off (default)flow control here
1253 */
1254 status =
1255 qt_setuart(port->serial, index, (unsigned short)divisor, new_LCR);
1256 if (status < 0) {
1257 dbg(__FILE__ "qt_setuart failed\n");
1258 return;
1259 }
1260
1261 /* Now determine flow control */
1262 if (cflag & CRTSCTS) {
1263 dbg("%s - Enabling HW flow control port %d\n", __func__,
1264 port->number);
1265
1266 /* Enable RTS/CTS flow control */
1267 status = BoxSetHW_FlowCtrl(port->serial, index, 1);
1268
1269 if (status < 0) {
1270 dbg(__FILE__ "BoxSetHW_FlowCtrl failed\n");
1271 return;
1272 }
1273 } else {
1274 /* Disable RTS/CTS flow control */
1275 dbg("%s - disabling HW flow control port %d\n", __func__,
1276 port->number);
1277
1278 status = BoxSetHW_FlowCtrl(port->serial, index, 0);
1279 if (status < 0) {
1280 dbg(__FILE__ "BoxSetHW_FlowCtrl failed\n");
1281 return;
1282 }
1283
1284 }
1285
1286 /* if we are implementing XON/XOFF, set the start and stop character in
1287 * the device */
1288 if (I_IXOFF(tty) || I_IXON(tty)) {
1289 unsigned char stop_char = STOP_CHAR(tty);
1290 unsigned char start_char = START_CHAR(tty);
1291 status =
1292 BoxSetSW_FlowCtrl(port->serial, index, stop_char,
1293 start_char);
1294 if (status < 0)
1295 dbg(__FILE__ "BoxSetSW_FlowCtrl (enabled) failed\n");
1296
1297 } else {
1298 /* disable SW flow control */
1299 status = BoxDisable_SW_FlowCtrl(port->serial, index);
1300 if (status < 0)
1301 dbg(__FILE__ "BoxSetSW_FlowCtrl (diabling) failed\n");
1302
1303 }
1304 tty->termios->c_cflag &= ~CMSPAR;
1305 /* FIXME: Error cases should be returning the actual bits changed only */
1306 }
1307
1308 static void qt_break(struct tty_struct *tty, int break_state)
1309 {
1310 struct usb_serial_port *port = tty->driver_data;
1311 struct usb_serial *serial = get_usb_serial(port, __func__);
1312 struct quatech_port *qt_port;
1313 u16 index, onoff;
1314 unsigned int result;
1315
1316 index = tty->index - serial->minor;
1317
1318 qt_port = qt_get_port_private(port);
1319
1320 if (break_state == -1)
1321 onoff = 1;
1322 else
1323 onoff = 0;
1324
1325 mutex_lock(&qt_port->lock);
1326
1327 result =
1328 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
1329 QT_BREAK_CONTROL, 0x40, onoff, index, NULL, 0, 300);
1330
1331 mutex_unlock(&qt_port->lock);
1332 }
1333
1334 static inline int qt_real_tiocmget(struct tty_struct *tty,
1335 struct usb_serial_port *port,
1336 struct usb_serial *serial)
1337 {
1338
1339 u8 mcr;
1340 u8 msr;
1341 unsigned int result = 0;
1342 int status;
1343 unsigned int index;
1344
1345 index = tty->index - serial->minor;
1346 status =
1347 BoxGetRegister(port->serial, index, MODEM_CONTROL_REGISTER, &mcr);
1348 if (status >= 0) {
1349 status =
1350 BoxGetRegister(port->serial, index,
1351 MODEM_STATUS_REGISTER, &msr);
1352
1353 }
1354
1355 if (status >= 0) {
1356 result = ((mcr & SERIAL_MCR_DTR) ? TIOCM_DTR : 0)
1357 /* DTR IS SET */
1358 | ((mcr & SERIAL_MCR_RTS) ? TIOCM_RTS : 0)
1359 /* RTS IS SET */
1360 | ((msr & SERIAL_MSR_CTS) ? TIOCM_CTS : 0)
1361 /* CTS is set */
1362 | ((msr & SERIAL_MSR_CD) ? TIOCM_CAR : 0)
1363 /* Carrier detect is set */
1364 | ((msr & SERIAL_MSR_RI) ? TIOCM_RI : 0)
1365 /* Ring indicator set */
1366 | ((msr & SERIAL_MSR_DSR) ? TIOCM_DSR : 0);
1367 /* DSR is set */
1368 return result;
1369
1370 } else
1371 return -ESPIPE;
1372 }
1373
1374 static inline int qt_real_tiocmset(struct tty_struct *tty,
1375 struct usb_serial_port *port,
1376 struct usb_serial *serial,
1377 unsigned int value)
1378 {
1379
1380 u8 mcr;
1381 int status;
1382 unsigned int index;
1383
1384 index = tty->index - serial->minor;
1385 status =
1386 BoxGetRegister(port->serial, index, MODEM_CONTROL_REGISTER, &mcr);
1387 if (status < 0)
1388 return -ESPIPE;
1389
1390 /*
1391 * Turn off the RTS and DTR and loopback and then only turn on what was
1392 * asked for
1393 */
1394 mcr &= ~(SERIAL_MCR_RTS | SERIAL_MCR_DTR | SERIAL_MCR_LOOP);
1395 if (value & TIOCM_RTS)
1396 mcr |= SERIAL_MCR_RTS;
1397 if (value & TIOCM_DTR)
1398 mcr |= SERIAL_MCR_DTR;
1399 if (value & TIOCM_LOOP)
1400 mcr |= SERIAL_MCR_LOOP;
1401
1402 status =
1403 BoxSetRegister(port->serial, index, MODEM_CONTROL_REGISTER, mcr);
1404 if (status < 0)
1405 return -ESPIPE;
1406 else
1407 return 0;
1408 }
1409
1410 static int qt_tiocmget(struct tty_struct *tty)
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 = -ENODEV;
1416
1417 if (!serial)
1418 return -ENODEV;
1419
1420 mutex_lock(&qt_port->lock);
1421 retval = qt_real_tiocmget(tty, port, serial);
1422 mutex_unlock(&qt_port->lock);
1423 return retval;
1424 }
1425
1426 static int qt_tiocmset(struct tty_struct *tty,
1427 unsigned int set, unsigned int clear)
1428 {
1429
1430 struct usb_serial_port *port = tty->driver_data;
1431 struct usb_serial *serial = get_usb_serial(port, __func__);
1432 struct quatech_port *qt_port = qt_get_port_private(port);
1433 int retval = -ENODEV;
1434
1435 if (!serial)
1436 return -ENODEV;
1437
1438 mutex_lock(&qt_port->lock);
1439 retval = qt_real_tiocmset(tty, port, serial, set);
1440 mutex_unlock(&qt_port->lock);
1441 return retval;
1442 }
1443
1444 static void qt_throttle(struct tty_struct *tty)
1445 {
1446 struct usb_serial_port *port = tty->driver_data;
1447 struct usb_serial *serial = get_usb_serial(port, __func__);
1448 struct quatech_port *qt_port;
1449
1450 if (!serial)
1451 return;
1452
1453 qt_port = qt_get_port_private(port);
1454
1455 mutex_lock(&qt_port->lock);
1456
1457 /* pass on to the driver specific version of this function */
1458 qt_port->RxHolding = 1;
1459
1460 mutex_unlock(&qt_port->lock);
1461 return;
1462 }
1463
1464 static void qt_unthrottle(struct tty_struct *tty)
1465 {
1466 struct usb_serial_port *port = tty->driver_data;
1467 struct usb_serial *serial = get_usb_serial(port, __func__);
1468 struct quatech_port *qt_port;
1469 unsigned int result;
1470
1471 if (!serial)
1472 return;
1473
1474 qt_port = qt_get_port_private(port);
1475
1476 mutex_lock(&qt_port->lock);
1477
1478 if (qt_port->RxHolding == 1) {
1479 dbg("%s -qt_port->RxHolding == 1\n", __func__);
1480
1481 qt_port->RxHolding = 0;
1482 dbg("%s - qt_port->RxHolding = 0\n", __func__);
1483
1484 /* if we have a bulk endpoint, start it up */
1485 if ((serial->num_bulk_in) && (qt_port->ReadBulkStopped == 1)) {
1486 /* Start reading from the device */
1487 usb_fill_bulk_urb(port->read_urb, serial->dev,
1488 usb_rcvbulkpipe(serial->dev,
1489 port->bulk_in_endpointAddress),
1490 port->read_urb->transfer_buffer,
1491 port->read_urb->
1492 transfer_buffer_length,
1493 qt_read_bulk_callback, port);
1494 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
1495 if (result)
1496 dev_err(&port->dev,
1497 "%s - failed restarting read urb, error %d\n",
1498 __func__, result);
1499 }
1500 }
1501 mutex_unlock(&qt_port->lock);
1502 return;
1503
1504 }
1505
1506 static int qt_calc_num_ports(struct usb_serial *serial)
1507 {
1508 int num_ports;
1509
1510 dbg("numberofendpoints: %d\n",
1511 (int)serial->interface->cur_altsetting->desc.bNumEndpoints);
1512 dbg("numberofendpoints: %d\n",
1513 (int)serial->interface->altsetting->desc.bNumEndpoints);
1514
1515 num_ports =
1516 (serial->interface->cur_altsetting->desc.bNumEndpoints - 1) / 2;
1517
1518 return num_ports;
1519 }
1520
1521 static struct usb_serial_driver quatech_device = {
1522 .driver = {
1523 .owner = THIS_MODULE,
1524 .name = "serqt",
1525 },
1526 .description = DRIVER_DESC,
1527 .id_table = id_table,
1528 .num_ports = 8,
1529 .open = qt_open,
1530 .close = qt_close,
1531 .write = qt_write,
1532 .write_room = qt_write_room,
1533 .chars_in_buffer = qt_chars_in_buffer,
1534 .throttle = qt_throttle,
1535 .unthrottle = qt_unthrottle,
1536 .calc_num_ports = qt_calc_num_ports,
1537 .ioctl = qt_ioctl,
1538 .set_termios = qt_set_termios,
1539 .break_ctl = qt_break,
1540 .tiocmget = qt_tiocmget,
1541 .tiocmset = qt_tiocmset,
1542 .attach = qt_startup,
1543 .release = qt_release,
1544 };
1545
1546 static struct usb_serial_driver * const serial_drivers[] = {
1547 &quatech_device, NULL
1548 };
1549
1550 module_usb_serial_driver(serial_drivers, id_table);
1551
1552 MODULE_AUTHOR(DRIVER_AUTHOR);
1553 MODULE_DESCRIPTION(DRIVER_DESC);
1554 MODULE_LICENSE("GPL");
1555
1556 module_param(debug, bool, S_IRUGO | S_IWUSR);
1557 MODULE_PARM_DESC(debug, "Debug enabled or not");
kernel source for telekom puls (alcatel/mediatek)