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 #define QUATECH_SSU100_2 0xC120 /* SSU100_2 */
45 #define QUATECH_DSU100_2 0xC140 /* DSU100_2 */
46 #define QUATECH_DSU400_2 0xC150 /* DSU400_2 */
47 #define QUATECH_QSU100_2 0xC160 /* QSU100_2 */
48 #define QUATECH_QSU400_2 0xC170 /* QSU400_2 */
49 #define QUATECH_ESU400_2 0xC180 /* ESU400_2 */
50 #define QUATECH_ESU100_2 0xC1A0 /* ESU100_2 */
51
52 #define QT_SET_GET_DEVICE 0xc2
53 #define QT_OPEN_CLOSE_CHANNEL 0xca
54 #define QT_GET_SET_PREBUF_TRIG_LVL 0xcc
55 #define QT_SET_ATF 0xcd
56 #define QT_GET_SET_REGISTER 0xc0
57 #define QT_GET_SET_UART 0xc1
58 #define QT_HW_FLOW_CONTROL_MASK 0xc5
59 #define QT_SW_FLOW_CONTROL_MASK 0xc6
60 #define QT_SW_FLOW_CONTROL_DISABLE 0xc7
61 #define QT_BREAK_CONTROL 0xc8
62
63 #define USBD_TRANSFER_DIRECTION_IN 0xc0
64 #define USBD_TRANSFER_DIRECTION_OUT 0x40
65
66 #define MAX_BAUD_RATE 460800
67 #define MAX_BAUD_REMAINDER 4608
68
69 #define DIV_LATCH_LS 0x00
70 #define XMT_HOLD_REGISTER 0x00
71 #define XVR_BUFFER_REGISTER 0x00
72 #define DIV_LATCH_MS 0x01
73 #define FIFO_CONTROL_REGISTER 0x02
74 #define LINE_CONTROL_REGISTER 0x03
75 #define MODEM_CONTROL_REGISTER 0x04
76 #define LINE_STATUS_REGISTER 0x05
77 #define MODEM_STATUS_REGISTER 0x06
78
79 #define SERIAL_MCR_DTR 0x01
80 #define SERIAL_MCR_RTS 0x02
81 #define SERIAL_MCR_LOOP 0x10
82
83 #define SERIAL_MSR_CTS 0x10
84 #define SERIAL_MSR_CD 0x80
85 #define SERIAL_MSR_RI 0x40
86 #define SERIAL_MSR_DSR 0x20
87 #define SERIAL_MSR_MASK 0xf0
88
89 #define SERIAL_8_DATA 0x03
90 #define SERIAL_7_DATA 0x02
91 #define SERIAL_6_DATA 0x01
92 #define SERIAL_5_DATA 0x00
93
94 #define SERIAL_ODD_PARITY 0X08
95 #define SERIAL_EVEN_PARITY 0X18
96 #define SERIAL_TWO_STOPB 0x04
97 #define SERIAL_ONE_STOPB 0x00
98
99 #define DEFAULT_DIVISOR 0x30 /* gives 9600 baud rate */
100 #define DEFAULT_LCR SERIAL_8_DATA /* 8, none , 1 */
101
102 #define FULLPWRBIT 0x00000080
103 #define NEXT_BOARD_POWER_BIT 0x00000004
104
105 #define SERIAL_LSR_OE 0x02
106 #define SERIAL_LSR_PE 0x04
107 #define SERIAL_LSR_FE 0x08
108 #define SERIAL_LSR_BI 0x10
109
110 #define SERIAL_MSR_CTS 0x10
111 #define SERIAL_MSR_CD 0x80
112 #define SERIAL_MSR_RI 0x40
113 #define SERIAL_MSR_DSR 0x20
114 #define SERIAL_MSR_MASK 0xf0
115
116 #define PREFUFF_LEVEL_CONSERVATIVE 128
117 #define ATC_DISABLED 0x0
118
119 #define RR_BITS 0x03 /* for clearing clock bits */
120 #define DUPMODE_BITS 0xc0
121 #define CLKS_X4 0x02
122
123 #define LOOPMODE_BITS 0x41 /* LOOP1 = b6, LOOP0 = b0 (PORT B) */
124 #define ALL_LOOPBACK 0x01
125 #define MODEM_CTRL 0x40
126 #define RS232_MODE 0x00
127
128 static const struct usb_device_id serqt_id_table[] = {
129 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU200)},
130 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU100)},
131 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU200)},
132 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU100)},
133 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU200)},
134 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU100A)},
135 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU100B)},
136 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU200A)},
137 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU200B)},
138 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU100A)},
139 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU100B)},
140 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU100C)},
141 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU100D)},
142 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU200A)},
143 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU200B)},
144 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU200C)},
145 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU200D)},
146 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU100_2)},
147 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU100_2)},
148 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU400_2)},
149 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU100_2)},
150 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU400_2)},
151 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU400_2)},
152 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU100_2)},
153 {} /* Terminating entry */
154 };
155
156 MODULE_DEVICE_TABLE(usb, serqt_id_table);
157
158 struct qt_get_device_data {
159 __u8 porta;
160 __u8 portb;
161 __u8 portc;
162 };
163
164 struct qt_open_channel_data {
165 __u8 line_status;
166 __u8 modem_status;
167 };
168
169 struct quatech_port {
170 int port_num; /* number of the port */
171 struct urb *write_urb; /* write URB for this port */
172 struct urb *read_urb; /* read URB for this port */
173 struct urb *int_urb;
174
175 __u8 shadowLCR; /* last LCR value received */
176 __u8 shadowMCR; /* last MCR value received */
177 __u8 shadowMSR; /* last MSR value received */
178 __u8 shadowLSR; /* last LSR value received */
179 char open_ports;
180
181 /* Used for TIOCMIWAIT */
182 wait_queue_head_t msr_wait;
183 char prev_status, diff_status;
184
185 wait_queue_head_t wait;
186
187 struct async_icount icount;
188
189 struct usb_serial_port *port; /* owner of this object */
190 struct qt_get_device_data DeviceData;
191 struct mutex lock;
192 bool read_urb_busy;
193 int RxHolding;
194 int ReadBulkStopped;
195 char closePending;
196 };
197
198 static struct usb_driver serqt_usb_driver = {
199 .name = "quatech-usb-serial",
200 .probe = usb_serial_probe,
201 .disconnect = usb_serial_disconnect,
202 .id_table = serqt_id_table,
203 .no_dynamic_id = 1,
204 };
205
port_paranoia_check(struct usb_serial_port * port,const char * function)206 static int port_paranoia_check(struct usb_serial_port *port,
207 const char *function)
208 {
209 if (!port) {
210 dbg("%s - port == NULL", function);
211 return -1;
212 }
213 if (!port->serial) {
214 dbg("%s - port->serial == NULL\n", function);
215 return -1;
216 }
217
218 return 0;
219 }
220
serial_paranoia_check(struct usb_serial * serial,const char * function)221 static int serial_paranoia_check(struct usb_serial *serial,
222 const char *function)
223 {
224 if (!serial) {
225 dbg("%s - serial == NULL\n", function);
226 return -1;
227 }
228
229 if (!serial->type) {
230 dbg("%s - serial->type == NULL!", function);
231 return -1;
232 }
233
234 return 0;
235 }
236
qt_get_port_private(struct usb_serial_port * port)237 static inline struct quatech_port *qt_get_port_private(struct usb_serial_port
238 *port)
239 {
240 return (struct quatech_port *)usb_get_serial_port_data(port);
241 }
242
qt_set_port_private(struct usb_serial_port * port,struct quatech_port * data)243 static inline void qt_set_port_private(struct usb_serial_port *port,
244 struct quatech_port *data)
245 {
246 usb_set_serial_port_data(port, (void *)data);
247 }
248
get_usb_serial(struct usb_serial_port * port,const char * function)249 static struct usb_serial *get_usb_serial(struct usb_serial_port *port,
250 const char *function)
251 {
252 /* if no port was specified, or it fails a paranoia check */
253 if (!port ||
254 port_paranoia_check(port, function) ||
255 serial_paranoia_check(port->serial, function)) {
256 /*
257 * then say that we dont have a valid usb_serial thing,
258 * which will end up genrating -ENODEV return values
259 */
260 return NULL;
261 }
262
263 return port->serial;
264 }
265
ProcessLineStatus(struct quatech_port * qt_port,unsigned char line_status)266 static void ProcessLineStatus(struct quatech_port *qt_port,
267 unsigned char line_status)
268 {
269
270 qt_port->shadowLSR =
271 line_status & (SERIAL_LSR_OE | SERIAL_LSR_PE | SERIAL_LSR_FE |
272 SERIAL_LSR_BI);
273 return;
274 }
275
ProcessModemStatus(struct quatech_port * qt_port,unsigned char modem_status)276 static void ProcessModemStatus(struct quatech_port *qt_port,
277 unsigned char modem_status)
278 {
279
280 qt_port->shadowMSR = modem_status;
281 wake_up_interruptible(&qt_port->wait);
282 return;
283 }
284
ProcessRxChar(struct tty_struct * tty,struct usb_serial_port * port,unsigned char data)285 static void ProcessRxChar(struct tty_struct *tty, struct usb_serial_port *port,
286 unsigned char data)
287 {
288 struct urb *urb = port->read_urb;
289 if (urb->actual_length)
290 tty_insert_flip_char(tty, data, TTY_NORMAL);
291 }
292
qt_write_bulk_callback(struct urb * urb)293 static void qt_write_bulk_callback(struct urb *urb)
294 {
295 struct tty_struct *tty;
296 int status;
297 struct quatech_port *quatech_port;
298
299 status = urb->status;
300
301 if (status) {
302 dbg("nonzero write bulk status received:%d\n", status);
303 return;
304 }
305
306 quatech_port = urb->context;
307
308 dbg("%s - port %d\n", __func__, quatech_port->port_num);
309
310 tty = tty_port_tty_get(&quatech_port->port->port);
311
312 if (tty)
313 tty_wakeup(tty);
314 tty_kref_put(tty);
315 }
316
qt_interrupt_callback(struct urb * urb)317 static void qt_interrupt_callback(struct urb *urb)
318 {
319 /* FIXME */
320 }
321
qt_read_bulk_callback(struct urb * urb)322 static void qt_read_bulk_callback(struct urb *urb)
323 {
324
325 struct usb_serial_port *port = urb->context;
326 struct usb_serial *serial = get_usb_serial(port, __func__);
327 struct quatech_port *qt_port = qt_get_port_private(port);
328 unsigned char *data;
329 struct tty_struct *tty;
330 unsigned int index;
331 unsigned int RxCount;
332 int i, result;
333 int flag, flag_data;
334
335 if (urb->status) {
336 qt_port->ReadBulkStopped = 1;
337 dbg("%s - nonzero write bulk status received: %d\n",
338 __func__, urb->status);
339 return;
340 }
341
342 tty = tty_port_tty_get(&port->port);
343 if (!tty) {
344 dbg("%s - bad tty pointer - exiting", __func__);
345 return;
346 }
347
348 data = urb->transfer_buffer;
349
350 RxCount = urb->actual_length;
351
352 /* index = MINOR(port->tty->device) - serial->minor; */
353 index = tty->index - serial->minor;
354
355 dbg("%s - port %d\n", __func__, port->number);
356 dbg("%s - port->RxHolding = %d\n", __func__, qt_port->RxHolding);
357
358 if (port_paranoia_check(port, __func__) != 0) {
359 dbg("%s - port_paranoia_check, exiting\n", __func__);
360 qt_port->ReadBulkStopped = 1;
361 goto exit;
362 }
363
364 if (!serial) {
365 dbg("%s - bad serial pointer, exiting\n", __func__);
366 goto exit;
367 }
368 if (qt_port->closePending == 1) {
369 /* Were closing , stop reading */
370 dbg("%s - (qt_port->closepending == 1\n", __func__);
371 qt_port->ReadBulkStopped = 1;
372 goto exit;
373 }
374
375 /*
376 * RxHolding is asserted by throttle, if we assert it, we're not
377 * receiving any more characters and let the box handle the flow
378 * control
379 */
380 if (qt_port->RxHolding == 1) {
381 qt_port->ReadBulkStopped = 1;
382 goto exit;
383 }
384
385 if (urb->status) {
386 qt_port->ReadBulkStopped = 1;
387
388 dbg("%s - nonzero read bulk status received: %d\n",
389 __func__, urb->status);
390 goto exit;
391 }
392
393 if (tty && RxCount) {
394 flag_data = 0;
395 for (i = 0; i < RxCount; ++i) {
396 /* Look ahead code here */
397 if ((i <= (RxCount - 3)) && (data[i] == 0x1b)
398 && (data[i + 1] == 0x1b)) {
399 flag = 0;
400 switch (data[i + 2]) {
401 case 0x00:
402 /* line status change 4th byte must follow */
403 if (i > (RxCount - 4)) {
404 dbg("Illegal escape seuences in received data\n");
405 break;
406 }
407 ProcessLineStatus(qt_port, data[i + 3]);
408 i += 3;
409 flag = 1;
410 break;
411
412 case 0x01:
413 /* Modem status status change 4th byte must follow */
414 dbg("Modem status status.\n");
415 if (i > (RxCount - 4)) {
416 dbg("Illegal escape sequences in received data\n");
417 break;
418 }
419 ProcessModemStatus(qt_port,
420 data[i + 3]);
421 i += 3;
422 flag = 1;
423 break;
424 case 0xff:
425 dbg("No status sequence.\n");
426
427 if (tty) {
428 ProcessRxChar(tty, port, data[i]);
429 ProcessRxChar(tty, port, data[i + 1]);
430 }
431 i += 2;
432 break;
433 }
434 if (flag == 1)
435 continue;
436 }
437
438 if (tty && urb->actual_length)
439 tty_insert_flip_char(tty, data[i], TTY_NORMAL);
440
441 }
442 tty_flip_buffer_push(tty);
443 }
444
445 /* Continue trying to always read */
446 usb_fill_bulk_urb(port->read_urb, serial->dev,
447 usb_rcvbulkpipe(serial->dev,
448 port->bulk_in_endpointAddress),
449 port->read_urb->transfer_buffer,
450 port->read_urb->transfer_buffer_length,
451 qt_read_bulk_callback, port);
452 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
453 if (result)
454 dbg("%s - failed resubmitting read urb, error %d",
455 __func__, result);
456 else {
457 if (tty && RxCount) {
458 tty_flip_buffer_push(tty);
459 tty_schedule_flip(tty);
460 }
461 }
462
463 schedule_work(&port->work);
464 exit:
465 tty_kref_put(tty);
466 }
467
468 /*
469 * qt_get_device
470 * Issue a GET_DEVICE vendor-specific request on the default control pipe If
471 * successful, fills in the qt_get_device_data structure pointed to by
472 * device_data, otherwise return a negative error number of the problem.
473 */
474
qt_get_device(struct usb_serial * serial,struct qt_get_device_data * device_data)475 static int qt_get_device(struct usb_serial *serial,
476 struct qt_get_device_data *device_data)
477 {
478 int result;
479 unsigned char *transfer_buffer;
480
481 transfer_buffer =
482 kmalloc(sizeof(struct qt_get_device_data), GFP_KERNEL);
483 if (!transfer_buffer)
484 return -ENOMEM;
485
486 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
487 QT_SET_GET_DEVICE, 0xc0, 0, 0,
488 transfer_buffer,
489 sizeof(struct qt_get_device_data), 300);
490 if (result > 0)
491 memcpy(device_data, transfer_buffer,
492 sizeof(struct qt_get_device_data));
493 kfree(transfer_buffer);
494
495 return result;
496 }
497
498 /****************************************************************************
499 * BoxSetPrebufferLevel
500 TELLS BOX WHEN TO ASSERT FLOW CONTROL
501 ****************************************************************************/
BoxSetPrebufferLevel(struct usb_serial * serial)502 static int BoxSetPrebufferLevel(struct usb_serial *serial)
503 {
504 int result;
505 __u16 buffer_length;
506
507 buffer_length = PREFUFF_LEVEL_CONSERVATIVE;
508 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
509 QT_GET_SET_PREBUF_TRIG_LVL, 0x40,
510 buffer_length, 0, NULL, 0, 300);
511 return result;
512 }
513
514 /****************************************************************************
515 * BoxSetATC
516 TELLS BOX WHEN TO ASSERT automatic transmitter control
517 ****************************************************************************/
BoxSetATC(struct usb_serial * serial,__u16 n_Mode)518 static int BoxSetATC(struct usb_serial *serial, __u16 n_Mode)
519 {
520 int result;
521 __u16 buffer_length;
522
523 buffer_length = PREFUFF_LEVEL_CONSERVATIVE;
524
525 result =
526 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
527 QT_SET_ATF, 0x40, n_Mode, 0, NULL, 0, 300);
528
529 return result;
530 }
531
532 /**
533 * qt_set_device
534 * Issue a SET_DEVICE vendor-specific request on the default control pipe If
535 * successful returns the number of bytes written, otherwise it returns a
536 * negative error number of the problem.
537 */
qt_set_device(struct usb_serial * serial,struct qt_get_device_data * device_data)538 static int qt_set_device(struct usb_serial *serial,
539 struct qt_get_device_data *device_data)
540 {
541 int result;
542 __u16 length;
543 __u16 PortSettings;
544
545 PortSettings = ((__u16) (device_data->portb));
546 PortSettings = (PortSettings << 8);
547 PortSettings += ((__u16) (device_data->porta));
548
549 length = sizeof(struct qt_get_device_data);
550 dbg("%s - PortSettings = 0x%x\n", __func__, PortSettings);
551
552 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
553 QT_SET_GET_DEVICE, 0x40, PortSettings,
554 0, NULL, 0, 300);
555 return result;
556 }
557
qt_open_channel(struct usb_serial * serial,__u16 Uart_Number,struct qt_open_channel_data * pDeviceData)558 static int qt_open_channel(struct usb_serial *serial, __u16 Uart_Number,
559 struct qt_open_channel_data *pDeviceData)
560 {
561 int result;
562
563 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
564 QT_OPEN_CLOSE_CHANNEL,
565 USBD_TRANSFER_DIRECTION_IN, 1, Uart_Number,
566 pDeviceData,
567 sizeof(struct qt_open_channel_data), 300);
568
569 return result;
570
571 }
572
qt_close_channel(struct usb_serial * serial,__u16 Uart_Number)573 static int qt_close_channel(struct usb_serial *serial, __u16 Uart_Number)
574 {
575 int result;
576
577 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
578 QT_OPEN_CLOSE_CHANNEL,
579 USBD_TRANSFER_DIRECTION_OUT, 0, Uart_Number,
580 NULL, 0, 300);
581
582 return result;
583
584 }
585
586 /****************************************************************************
587 * BoxGetRegister
588 * issuse a GET_REGISTER vendor-spcific request on the default control pipe
589 * If successful, fills in the pValue with the register value asked for
590 ****************************************************************************/
BoxGetRegister(struct usb_serial * serial,unsigned short Uart_Number,unsigned short Register_Num,__u8 * pValue)591 static int BoxGetRegister(struct usb_serial *serial, unsigned short Uart_Number,
592 unsigned short Register_Num, __u8 *pValue)
593 {
594 int result;
595 __u16 current_length;
596
597 current_length = sizeof(struct qt_get_device_data);
598
599 result =
600 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
601 QT_GET_SET_REGISTER, 0xC0, Register_Num,
602 Uart_Number, (void *)pValue, sizeof(*pValue), 300);
603
604 return result;
605 }
606
607 /****************************************************************************
608 * BoxSetRegister
609 * issuse a GET_REGISTER vendor-spcific request on the default control pipe
610 * If successful, fills in the pValue with the register value asked for
611 ****************************************************************************/
BoxSetRegister(struct usb_serial * serial,unsigned short Uart_Number,unsigned short Register_Num,unsigned short Value)612 static int BoxSetRegister(struct usb_serial *serial, unsigned short Uart_Number,
613 unsigned short Register_Num, unsigned short Value)
614 {
615 int result;
616 unsigned short RegAndByte;
617
618 RegAndByte = Value;
619 RegAndByte = RegAndByte << 8;
620 RegAndByte = RegAndByte + Register_Num;
621
622 /*
623 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
624 QT_GET_SET_REGISTER, 0xC0, Register_Num,
625 Uart_Number, NULL, 0, 300);
626 */
627
628 result =
629 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
630 QT_GET_SET_REGISTER, 0x40, RegAndByte, Uart_Number,
631 NULL, 0, 300);
632
633 return result;
634 }
635
636 /*
637 * qt_setuart
638 * issuse a SET_UART vendor-spcific request on the default control pipe
639 * If successful sets baud rate divisor and LCR value
640 */
qt_setuart(struct usb_serial * serial,unsigned short Uart_Number,unsigned short default_divisor,unsigned char default_LCR)641 static int qt_setuart(struct usb_serial *serial, unsigned short Uart_Number,
642 unsigned short default_divisor, unsigned char default_LCR)
643 {
644 int result;
645 unsigned short UartNumandLCR;
646
647 UartNumandLCR = (default_LCR << 8) + Uart_Number;
648
649 result =
650 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
651 QT_GET_SET_UART, 0x40, default_divisor,
652 UartNumandLCR, NULL, 0, 300);
653
654 return result;
655 }
656
BoxSetHW_FlowCtrl(struct usb_serial * serial,unsigned int index,int bSet)657 static int BoxSetHW_FlowCtrl(struct usb_serial *serial, unsigned int index,
658 int bSet)
659 {
660 __u8 mcr = 0;
661 __u8 msr = 0, MOUT_Value = 0;
662 unsigned int status;
663
664 if (bSet == 1) {
665 /* flow control, box will clear RTS line to prevent remote */
666 mcr = SERIAL_MCR_RTS;
667 } /* device from xmitting more chars */
668 else {
669 /* no flow control to remote device */
670 mcr = 0;
671
672 }
673 MOUT_Value = mcr << 8;
674
675 if (bSet == 1) {
676 /* flow control, box will inhibit xmit data if CTS line is
677 * asserted */
678 msr = SERIAL_MSR_CTS;
679 } else {
680 /* Box will not inhimbe xmit data due to CTS line */
681 msr = 0;
682 }
683 MOUT_Value |= msr;
684
685 status =
686 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
687 QT_HW_FLOW_CONTROL_MASK, 0x40, MOUT_Value,
688 index, NULL, 0, 300);
689 return status;
690
691 }
692
BoxSetSW_FlowCtrl(struct usb_serial * serial,__u16 index,unsigned char stop_char,unsigned char start_char)693 static int BoxSetSW_FlowCtrl(struct usb_serial *serial, __u16 index,
694 unsigned char stop_char, unsigned char start_char)
695 {
696 __u16 nSWflowout;
697 int result;
698
699 nSWflowout = start_char << 8;
700 nSWflowout = (unsigned short)stop_char;
701
702 result =
703 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
704 QT_SW_FLOW_CONTROL_MASK, 0x40, nSWflowout,
705 index, NULL, 0, 300);
706 return result;
707
708 }
709
BoxDisable_SW_FlowCtrl(struct usb_serial * serial,__u16 index)710 static int BoxDisable_SW_FlowCtrl(struct usb_serial *serial, __u16 index)
711 {
712 int result;
713
714 result =
715 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
716 QT_SW_FLOW_CONTROL_DISABLE, 0x40, 0, index,
717 NULL, 0, 300);
718 return result;
719
720 }
721
qt_startup(struct usb_serial * serial)722 static int qt_startup(struct usb_serial *serial)
723 {
724 struct usb_serial_port *port;
725 struct quatech_port *qt_port;
726 struct qt_get_device_data DeviceData;
727 int i;
728 int status;
729
730 dbg("enterting %s", __func__);
731
732 /* Now setup per port private data */
733 for (i = 0; i < serial->num_ports; i++) {
734 port = serial->port[i];
735 qt_port = kzalloc(sizeof(*qt_port), GFP_KERNEL);
736 if (!qt_port) {
737 dbg("%s: kmalloc for quatech_port (%d) failed!.",
738 __func__, i);
739 for (--i; i >= 0; i--) {
740 port = serial->port[i];
741 kfree(usb_get_serial_port_data(port));
742 usb_set_serial_port_data(port, NULL);
743 }
744 return -ENOMEM;
745 }
746 mutex_init(&qt_port->lock);
747
748 usb_set_serial_port_data(port, qt_port);
749
750 }
751
752 status = qt_get_device(serial, &DeviceData);
753 if (status < 0) {
754 dbg(__FILE__ "box_get_device failed");
755 goto startup_error;
756 }
757
758 dbg(__FILE__ "DeviceData.portb = 0x%x", DeviceData.portb);
759
760 DeviceData.portb &= ~FULLPWRBIT;
761 dbg(__FILE__ "Changing DeviceData.portb to 0x%x", DeviceData.portb);
762
763 status = qt_set_device(serial, &DeviceData);
764 if (status < 0) {
765 dbg(__FILE__ "qt_set_device failed\n");
766 goto startup_error;
767 }
768
769 status = qt_get_device(serial, &DeviceData);
770 if (status < 0) {
771 dbg(__FILE__ "qt_get_device failed");
772 goto startup_error;
773 }
774
775 switch (serial->dev->descriptor.idProduct) {
776 case QUATECH_DSU100:
777 case QUATECH_QSU100:
778 case QUATECH_ESU100A:
779 case QUATECH_ESU100B:
780 case QUATECH_HSU100A:
781 case QUATECH_HSU100B:
782 case QUATECH_HSU100C:
783 case QUATECH_HSU100D:
784 DeviceData.porta &= ~(RR_BITS | DUPMODE_BITS);
785 DeviceData.porta |= CLKS_X4;
786 DeviceData.portb &= ~(LOOPMODE_BITS);
787 DeviceData.portb |= RS232_MODE;
788 break;
789
790 case QUATECH_SSU200:
791 case QUATECH_DSU200:
792 case QUATECH_QSU200:
793 case QUATECH_ESU200A:
794 case QUATECH_ESU200B:
795 case QUATECH_HSU200A:
796 case QUATECH_HSU200B:
797 case QUATECH_HSU200C:
798 case QUATECH_HSU200D:
799 DeviceData.porta &= ~(RR_BITS | DUPMODE_BITS);
800 DeviceData.porta |= CLKS_X4;
801 DeviceData.portb &= ~(LOOPMODE_BITS);
802 DeviceData.portb |= ALL_LOOPBACK;
803 break;
804 default:
805 DeviceData.porta &= ~(RR_BITS | DUPMODE_BITS);
806 DeviceData.porta |= CLKS_X4;
807 DeviceData.portb &= ~(LOOPMODE_BITS);
808 DeviceData.portb |= RS232_MODE;
809 break;
810
811 }
812
813 status = BoxSetPrebufferLevel(serial); /* sets to default value */
814 if (status < 0) {
815 dbg(__FILE__ "BoxSetPrebufferLevel failed\n");
816 goto startup_error;
817 }
818
819 status = BoxSetATC(serial, ATC_DISABLED);
820 if (status < 0) {
821 dbg(__FILE__ "BoxSetATC failed\n");
822 goto startup_error;
823 }
824
825 dbg(__FILE__ "DeviceData.portb = 0x%x", DeviceData.portb);
826
827 DeviceData.portb |= NEXT_BOARD_POWER_BIT;
828 dbg(__FILE__ "Changing DeviceData.portb to 0x%x", DeviceData.portb);
829
830 status = qt_set_device(serial, &DeviceData);
831 if (status < 0) {
832 dbg(__FILE__ "qt_set_device failed\n");
833 goto startup_error;
834 }
835
836 dbg("Exit Success %s\n", __func__);
837
838 return 0;
839
840 startup_error:
841 for (i = 0; i < serial->num_ports; i++) {
842 port = serial->port[i];
843 qt_port = qt_get_port_private(port);
844 kfree(qt_port);
845 usb_set_serial_port_data(port, NULL);
846 }
847
848 dbg("Exit fail %s\n", __func__);
849
850 return -EIO;
851 }
852
qt_release(struct usb_serial * serial)853 static void qt_release(struct usb_serial *serial)
854 {
855 struct usb_serial_port *port;
856 struct quatech_port *qt_port;
857 int i;
858
859 dbg("enterting %s", __func__);
860
861 for (i = 0; i < serial->num_ports; i++) {
862 port = serial->port[i];
863 if (!port)
864 continue;
865
866 qt_port = usb_get_serial_port_data(port);
867 kfree(qt_port);
868 usb_set_serial_port_data(port, NULL);
869 }
870
871 }
872
qt_open(struct tty_struct * tty,struct usb_serial_port * port)873 static int qt_open(struct tty_struct *tty,
874 struct usb_serial_port *port)
875 {
876 struct usb_serial *serial;
877 struct quatech_port *quatech_port;
878 struct quatech_port *port0;
879 struct qt_open_channel_data ChannelData;
880
881 int result;
882
883 if (port_paranoia_check(port, __func__))
884 return -ENODEV;
885
886 dbg("%s - port %d\n", __func__, port->number);
887
888 serial = port->serial;
889
890 if (serial_paranoia_check(serial, __func__))
891 return -ENODEV;
892
893 quatech_port = qt_get_port_private(port);
894 port0 = qt_get_port_private(serial->port[0]);
895
896 if (quatech_port == NULL || port0 == NULL)
897 return -ENODEV;
898
899 usb_clear_halt(serial->dev, port->write_urb->pipe);
900 usb_clear_halt(serial->dev, port->read_urb->pipe);
901 port0->open_ports++;
902
903 result = qt_get_device(serial, &port0->DeviceData);
904
905 /* Port specific setups */
906 result = qt_open_channel(serial, port->number, &ChannelData);
907 if (result < 0) {
908 dbg(__FILE__ "qt_open_channel failed\n");
909 return result;
910 }
911 dbg(__FILE__ "qt_open_channel completed.\n");
912
913 /* FIXME: are these needed? Does it even do anything useful? */
914 quatech_port->shadowLSR = ChannelData.line_status &
915 (SERIAL_LSR_OE | SERIAL_LSR_PE | SERIAL_LSR_FE | SERIAL_LSR_BI);
916
917 quatech_port->shadowMSR = ChannelData.modem_status &
918 (SERIAL_MSR_CTS | SERIAL_MSR_DSR | SERIAL_MSR_RI | SERIAL_MSR_CD);
919
920 /* Set Baud rate to default and turn off (default)flow control here */
921 result = qt_setuart(serial, port->number, DEFAULT_DIVISOR, DEFAULT_LCR);
922 if (result < 0) {
923 dbg(__FILE__ "qt_setuart failed\n");
924 return result;
925 }
926 dbg(__FILE__ "qt_setuart completed.\n");
927
928 /*
929 * Put this here to make it responsive to stty and defaults set by
930 * the tty layer
931 */
932 /* FIXME: is this needed? */
933 /* qt_set_termios(tty, port, NULL); */
934
935 /* Check to see if we've set up our endpoint info yet */
936 if (port0->open_ports == 1) {
937 if (serial->port[0]->interrupt_in_buffer == NULL) {
938 /* set up interrupt urb */
939 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
940 serial->dev,
941 usb_rcvintpipe(serial->dev,
942 serial->port[0]->interrupt_in_endpointAddress),
943 serial->port[0]->interrupt_in_buffer,
944 serial->port[0]->
945 interrupt_in_urb->transfer_buffer_length,
946 qt_interrupt_callback, serial,
947 serial->port[0]->
948 interrupt_in_urb->interval);
949
950 result =
951 usb_submit_urb(serial->port[0]->interrupt_in_urb,
952 GFP_KERNEL);
953 if (result) {
954 dev_err(&port->dev,
955 "%s - Error %d submitting "
956 "interrupt urb\n", __func__, result);
957 }
958
959 }
960
961 }
962
963 dbg("port number is %d\n", port->number);
964 dbg("serial number is %d\n", port->serial->minor);
965 dbg("Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
966 dbg("BulkOut endpoint is %d\n", port->bulk_out_endpointAddress);
967 dbg("Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress);
968 dbg("port's number in the device is %d\n", quatech_port->port_num);
969 quatech_port->read_urb = port->read_urb;
970
971 /* set up our bulk in urb */
972
973 usb_fill_bulk_urb(quatech_port->read_urb,
974 serial->dev,
975 usb_rcvbulkpipe(serial->dev,
976 port->bulk_in_endpointAddress),
977 port->bulk_in_buffer,
978 quatech_port->read_urb->transfer_buffer_length,
979 qt_read_bulk_callback, quatech_port);
980
981 dbg("qt_open: bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
982 quatech_port->read_urb_busy = true;
983 result = usb_submit_urb(quatech_port->read_urb, GFP_KERNEL);
984 if (result) {
985 dev_err(&port->dev,
986 "%s - Error %d submitting control urb\n",
987 __func__, result);
988 quatech_port->read_urb_busy = false;
989 }
990
991 /* initialize our wait queues */
992 init_waitqueue_head(&quatech_port->wait);
993 init_waitqueue_head(&quatech_port->msr_wait);
994
995 /* initialize our icount structure */
996 memset(&(quatech_port->icount), 0x00, sizeof(quatech_port->icount));
997
998 return 0;
999
1000 }
1001
qt_chars_in_buffer(struct tty_struct * tty)1002 static int qt_chars_in_buffer(struct tty_struct *tty)
1003 {
1004 struct usb_serial_port *port = tty->driver_data;
1005 struct usb_serial *serial;
1006 int chars = 0;
1007
1008 serial = get_usb_serial(port, __func__);
1009
1010 dbg("%s - port %d\n", __func__, port->number);
1011
1012 if (serial->num_bulk_out) {
1013 if (port->write_urb->status == -EINPROGRESS)
1014 chars = port->write_urb->transfer_buffer_length;
1015 }
1016
1017 dbg("%s - returns %d\n", __func__, chars);
1018
1019 return chars;
1020 }
1021
qt_block_until_empty(struct tty_struct * tty,struct quatech_port * qt_port)1022 static void qt_block_until_empty(struct tty_struct *tty,
1023 struct quatech_port *qt_port)
1024 {
1025 int timeout = HZ / 10;
1026 int wait = 30;
1027 int count;
1028
1029 while (1) {
1030
1031 count = qt_chars_in_buffer(tty);
1032
1033 if (count <= 0)
1034 return;
1035
1036 interruptible_sleep_on_timeout(&qt_port->wait, timeout);
1037
1038 wait--;
1039 if (wait == 0) {
1040 dbg("%s - TIMEOUT", __func__);
1041 return;
1042 } else {
1043 wait = 30;
1044 }
1045 }
1046 }
1047
qt_close(struct usb_serial_port * port)1048 static void qt_close(struct usb_serial_port *port)
1049 {
1050 struct usb_serial *serial = port->serial;
1051 struct quatech_port *qt_port;
1052 struct quatech_port *port0;
1053 struct tty_struct *tty;
1054 int status;
1055 unsigned int index;
1056 status = 0;
1057
1058 dbg("%s - port %d\n", __func__, port->number);
1059
1060 tty = tty_port_tty_get(&port->port);
1061 index = tty->index - serial->minor;
1062
1063 qt_port = qt_get_port_private(port);
1064 port0 = qt_get_port_private(serial->port[0]);
1065
1066 /* shutdown any bulk reads that might be going on */
1067 if (serial->num_bulk_out)
1068 usb_unlink_urb(port->write_urb);
1069 if (serial->num_bulk_in)
1070 usb_unlink_urb(port->read_urb);
1071
1072 /* wait up to for transmitter to empty */
1073 if (serial->dev)
1074 qt_block_until_empty(tty, qt_port);
1075 tty_kref_put(tty);
1076
1077 /* Close uart channel */
1078 status = qt_close_channel(serial, index);
1079 if (status < 0)
1080 dbg("%s - port %d qt_close_channel failed.\n",
1081 __func__, port->number);
1082
1083 port0->open_ports--;
1084
1085 dbg("qt_num_open_ports in close%d:in port%d\n",
1086 port0->open_ports, port->number);
1087
1088 if (port0->open_ports == 0) {
1089 if (serial->port[0]->interrupt_in_urb) {
1090 dbg("%s", "Shutdown interrupt_in_urb\n");
1091 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1092 }
1093
1094 }
1095
1096 if (qt_port->write_urb) {
1097 /* if this urb had a transfer buffer already (old tx) free it */
1098 kfree(qt_port->write_urb->transfer_buffer);
1099 usb_free_urb(qt_port->write_urb);
1100 }
1101
1102 }
1103
qt_write(struct tty_struct * tty,struct usb_serial_port * port,const unsigned char * buf,int count)1104 static int qt_write(struct tty_struct *tty, struct usb_serial_port *port,
1105 const unsigned char *buf, int count)
1106 {
1107 int result;
1108 struct usb_serial *serial = get_usb_serial(port, __func__);
1109
1110 if (serial == NULL)
1111 return -ENODEV;
1112
1113 dbg("%s - port %d\n", __func__, port->number);
1114
1115 if (count == 0) {
1116 dbg("%s - write request of 0 bytes\n", __func__);
1117 return 0;
1118 }
1119
1120 /* only do something if we have a bulk out endpoint */
1121 if (serial->num_bulk_out) {
1122 if (port->write_urb->status == -EINPROGRESS) {
1123 dbg("%s - already writing\n", __func__);
1124 return 0;
1125 }
1126
1127 count =
1128 (count > port->bulk_out_size) ? port->bulk_out_size : count;
1129 memcpy(port->write_urb->transfer_buffer, buf, count);
1130
1131 /* set up our urb */
1132
1133 usb_fill_bulk_urb(port->write_urb, serial->dev,
1134 usb_sndbulkpipe(serial->dev,
1135 port->
1136 bulk_out_endpointAddress),
1137 port->write_urb->transfer_buffer, count,
1138 qt_write_bulk_callback, port);
1139
1140 /* send the data out the bulk port */
1141 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1142 if (result)
1143 dbg("%s - failed submitting write urb, error %d\n",
1144 __func__, result);
1145 else
1146 result = count;
1147
1148 return result;
1149 }
1150
1151 /* no bulk out, so return 0 bytes written */
1152 return 0;
1153 }
1154
qt_write_room(struct tty_struct * tty)1155 static int qt_write_room(struct tty_struct *tty)
1156 {
1157 struct usb_serial_port *port = tty->driver_data;
1158 struct usb_serial *serial;
1159 struct quatech_port *qt_port;
1160
1161 int retval = -EINVAL;
1162
1163 if (port_paranoia_check(port, __func__)) {
1164 dbg("%s", "Invalid port\n");
1165 return -1;
1166 }
1167
1168 serial = get_usb_serial(port, __func__);
1169
1170 if (!serial)
1171 return -ENODEV;
1172
1173 qt_port = qt_get_port_private(port);
1174
1175 mutex_lock(&qt_port->lock);
1176
1177 dbg("%s - port %d\n", __func__, port->number);
1178
1179 if (serial->num_bulk_out) {
1180 if (port->write_urb->status != -EINPROGRESS)
1181 retval = port->bulk_out_size;
1182 }
1183
1184 mutex_unlock(&qt_port->lock);
1185 return retval;
1186
1187 }
1188
qt_ioctl(struct tty_struct * tty,unsigned int cmd,unsigned long arg)1189 static int qt_ioctl(struct tty_struct *tty,
1190 unsigned int cmd, unsigned long arg)
1191 {
1192 struct usb_serial_port *port = tty->driver_data;
1193 struct quatech_port *qt_port = qt_get_port_private(port);
1194 struct usb_serial *serial = get_usb_serial(port, __func__);
1195 unsigned int index;
1196
1197 dbg("%s cmd 0x%04x", __func__, cmd);
1198
1199 index = tty->index - serial->minor;
1200
1201 if (cmd == TIOCMIWAIT) {
1202 while (qt_port != NULL) {
1203 interruptible_sleep_on(&qt_port->msr_wait);
1204 if (signal_pending(current))
1205 return -ERESTARTSYS;
1206 else {
1207 char diff = qt_port->diff_status;
1208
1209 if (diff == 0)
1210 return -EIO; /* no change => error */
1211
1212 /* Consume all events */
1213 qt_port->diff_status = 0;
1214
1215 if (((arg & TIOCM_RNG)
1216 && (diff & SERIAL_MSR_RI))
1217 || ((arg & TIOCM_DSR)
1218 && (diff & SERIAL_MSR_DSR))
1219 || ((arg & TIOCM_CD)
1220 && (diff & SERIAL_MSR_CD))
1221 || ((arg & TIOCM_CTS)
1222 && (diff & SERIAL_MSR_CTS))) {
1223 return 0;
1224 }
1225 }
1226 }
1227 return 0;
1228 }
1229
1230 dbg("%s -No ioctl for that one. port = %d\n", __func__, port->number);
1231 return -ENOIOCTLCMD;
1232 }
1233
qt_set_termios(struct tty_struct * tty,struct usb_serial_port * port,struct ktermios * old_termios)1234 static void qt_set_termios(struct tty_struct *tty,
1235 struct usb_serial_port *port,
1236 struct ktermios *old_termios)
1237 {
1238 struct ktermios *termios = tty->termios;
1239 unsigned char new_LCR = 0;
1240 unsigned int cflag = termios->c_cflag;
1241 unsigned int index;
1242 int baud, divisor, remainder;
1243 int status;
1244
1245 dbg("%s", __func__);
1246
1247 index = tty->index - port->serial->minor;
1248
1249 switch (cflag) {
1250 case CS5:
1251 new_LCR |= SERIAL_5_DATA;
1252 break;
1253 case CS6:
1254 new_LCR |= SERIAL_6_DATA;
1255 break;
1256 case CS7:
1257 new_LCR |= SERIAL_7_DATA;
1258 break;
1259 default:
1260 case CS8:
1261 new_LCR |= SERIAL_8_DATA;
1262 break;
1263 }
1264
1265 /* Parity stuff */
1266 if (cflag & PARENB) {
1267 if (cflag & PARODD)
1268 new_LCR |= SERIAL_ODD_PARITY;
1269 else
1270 new_LCR |= SERIAL_EVEN_PARITY;
1271 }
1272 if (cflag & CSTOPB)
1273 new_LCR |= SERIAL_TWO_STOPB;
1274 else
1275 new_LCR |= SERIAL_ONE_STOPB;
1276
1277 dbg("%s - 4\n", __func__);
1278
1279 /* Thats the LCR stuff, go ahead and set it */
1280 baud = tty_get_baud_rate(tty);
1281 if (!baud)
1282 /* pick a default, any default... */
1283 baud = 9600;
1284
1285 dbg("%s - got baud = %d\n", __func__, baud);
1286
1287 divisor = MAX_BAUD_RATE / baud;
1288 remainder = MAX_BAUD_RATE % baud;
1289 /* Round to nearest divisor */
1290 if (((remainder * 2) >= baud) && (baud != 110))
1291 divisor++;
1292
1293 /*
1294 * Set Baud rate to default and turn off (default)flow control here
1295 */
1296 status =
1297 qt_setuart(port->serial, index, (unsigned short)divisor, new_LCR);
1298 if (status < 0) {
1299 dbg(__FILE__ "qt_setuart failed\n");
1300 return;
1301 }
1302
1303 /* Now determine flow control */
1304 if (cflag & CRTSCTS) {
1305 dbg("%s - Enabling HW flow control port %d\n", __func__,
1306 port->number);
1307
1308 /* Enable RTS/CTS flow control */
1309 status = BoxSetHW_FlowCtrl(port->serial, index, 1);
1310
1311 if (status < 0) {
1312 dbg(__FILE__ "BoxSetHW_FlowCtrl failed\n");
1313 return;
1314 }
1315 } else {
1316 /* Disable RTS/CTS flow control */
1317 dbg("%s - disabling HW flow control port %d\n", __func__,
1318 port->number);
1319
1320 status = BoxSetHW_FlowCtrl(port->serial, index, 0);
1321 if (status < 0) {
1322 dbg(__FILE__ "BoxSetHW_FlowCtrl failed\n");
1323 return;
1324 }
1325
1326 }
1327
1328 /* if we are implementing XON/XOFF, set the start and stop character in
1329 * the device */
1330 if (I_IXOFF(tty) || I_IXON(tty)) {
1331 unsigned char stop_char = STOP_CHAR(tty);
1332 unsigned char start_char = START_CHAR(tty);
1333 status =
1334 BoxSetSW_FlowCtrl(port->serial, index, stop_char,
1335 start_char);
1336 if (status < 0)
1337 dbg(__FILE__ "BoxSetSW_FlowCtrl (enabled) failed\n");
1338
1339 } else {
1340 /* disable SW flow control */
1341 status = BoxDisable_SW_FlowCtrl(port->serial, index);
1342 if (status < 0)
1343 dbg(__FILE__ "BoxSetSW_FlowCtrl (diabling) failed\n");
1344
1345 }
1346 tty->termios->c_cflag &= ~CMSPAR;
1347 /* FIXME: Error cases should be returning the actual bits changed only */
1348 }
1349
qt_break(struct tty_struct * tty,int break_state)1350 static void qt_break(struct tty_struct *tty, int break_state)
1351 {
1352 struct usb_serial_port *port = tty->driver_data;
1353 struct usb_serial *serial = get_usb_serial(port, __func__);
1354 struct quatech_port *qt_port;
1355 u16 index, onoff;
1356 unsigned int result;
1357
1358 index = tty->index - serial->minor;
1359
1360 qt_port = qt_get_port_private(port);
1361
1362 if (break_state == -1)
1363 onoff = 1;
1364 else
1365 onoff = 0;
1366
1367 mutex_lock(&qt_port->lock);
1368
1369 dbg("%s - port %d\n", __func__, port->number);
1370
1371 result =
1372 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
1373 QT_BREAK_CONTROL, 0x40, onoff, index, NULL, 0, 300);
1374
1375 mutex_unlock(&qt_port->lock);
1376 }
1377
qt_real_tiocmget(struct tty_struct * tty,struct usb_serial_port * port,struct usb_serial * serial)1378 static inline int qt_real_tiocmget(struct tty_struct *tty,
1379 struct usb_serial_port *port,
1380 struct usb_serial *serial)
1381 {
1382
1383 u8 mcr;
1384 u8 msr;
1385 unsigned int result = 0;
1386 int status;
1387 unsigned int index;
1388
1389 dbg("%s - port %d, tty =0x%p\n", __func__, port->number, tty);
1390
1391 index = tty->index - serial->minor;
1392 status =
1393 BoxGetRegister(port->serial, index, MODEM_CONTROL_REGISTER, &mcr);
1394 if (status >= 0) {
1395 status =
1396 BoxGetRegister(port->serial, index,
1397 MODEM_STATUS_REGISTER, &msr);
1398
1399 }
1400
1401 if (status >= 0) {
1402 result = ((mcr & SERIAL_MCR_DTR) ? TIOCM_DTR : 0)
1403 /* DTR IS SET */
1404 | ((mcr & SERIAL_MCR_RTS) ? TIOCM_RTS : 0)
1405 /* RTS IS SET */
1406 | ((msr & SERIAL_MSR_CTS) ? TIOCM_CTS : 0)
1407 /* CTS is set */
1408 | ((msr & SERIAL_MSR_CD) ? TIOCM_CAR : 0)
1409 /* Carrier detect is set */
1410 | ((msr & SERIAL_MSR_RI) ? TIOCM_RI : 0)
1411 /* Ring indicator set */
1412 | ((msr & SERIAL_MSR_DSR) ? TIOCM_DSR : 0);
1413 /* DSR is set */
1414 return result;
1415
1416 } else
1417 return -ESPIPE;
1418 }
1419
qt_real_tiocmset(struct tty_struct * tty,struct usb_serial_port * port,struct usb_serial * serial,unsigned int value)1420 static inline int qt_real_tiocmset(struct tty_struct *tty,
1421 struct usb_serial_port *port,
1422 struct usb_serial *serial,
1423 unsigned int value)
1424 {
1425
1426 u8 mcr;
1427 int status;
1428 unsigned int index;
1429
1430 dbg("%s - port %d\n", __func__, port->number);
1431
1432 index = tty->index - serial->minor;
1433 status =
1434 BoxGetRegister(port->serial, index, MODEM_CONTROL_REGISTER, &mcr);
1435 if (status < 0)
1436 return -ESPIPE;
1437
1438 /*
1439 * Turn off the RTS and DTR and loopbcck and then only turn on what was
1440 * asked for
1441 */
1442 mcr &= ~(SERIAL_MCR_RTS | SERIAL_MCR_DTR | SERIAL_MCR_LOOP);
1443 if (value & TIOCM_RTS)
1444 mcr |= SERIAL_MCR_RTS;
1445 if (value & TIOCM_DTR)
1446 mcr |= SERIAL_MCR_DTR;
1447 if (value & TIOCM_LOOP)
1448 mcr |= SERIAL_MCR_LOOP;
1449
1450 status =
1451 BoxSetRegister(port->serial, index, MODEM_CONTROL_REGISTER, mcr);
1452 if (status < 0)
1453 return -ESPIPE;
1454 else
1455 return 0;
1456 }
1457
qt_tiocmget(struct tty_struct * tty)1458 static int qt_tiocmget(struct tty_struct *tty)
1459 {
1460 struct usb_serial_port *port = tty->driver_data;
1461 struct usb_serial *serial = get_usb_serial(port, __func__);
1462 struct quatech_port *qt_port = qt_get_port_private(port);
1463 int retval = -ENODEV;
1464
1465 dbg("In %s\n", __func__);
1466
1467 if (!serial)
1468 return -ENODEV;
1469
1470 mutex_lock(&qt_port->lock);
1471
1472 dbg("%s - port %d\n", __func__, port->number);
1473 dbg("%s - port->RxHolding = %d\n", __func__, qt_port->RxHolding);
1474
1475 retval = qt_real_tiocmget(tty, port, serial);
1476
1477 mutex_unlock(&qt_port->lock);
1478 return retval;
1479 }
1480
qt_tiocmset(struct tty_struct * tty,unsigned int set,unsigned int clear)1481 static int qt_tiocmset(struct tty_struct *tty,
1482 unsigned int set, unsigned int clear)
1483 {
1484
1485 struct usb_serial_port *port = tty->driver_data;
1486 struct usb_serial *serial = get_usb_serial(port, __func__);
1487 struct quatech_port *qt_port = qt_get_port_private(port);
1488 int retval = -ENODEV;
1489
1490 dbg("In %s\n", __func__);
1491
1492 if (!serial)
1493 return -ENODEV;
1494
1495 mutex_lock(&qt_port->lock);
1496
1497 dbg("%s - port %d\n", __func__, port->number);
1498 dbg("%s - qt_port->RxHolding = %d\n", __func__, qt_port->RxHolding);
1499
1500 retval = qt_real_tiocmset(tty, port, serial, set);
1501
1502 mutex_unlock(&qt_port->lock);
1503 return retval;
1504 }
1505
qt_throttle(struct tty_struct * tty)1506 static void qt_throttle(struct tty_struct *tty)
1507 {
1508 struct usb_serial_port *port = tty->driver_data;
1509 struct usb_serial *serial = get_usb_serial(port, __func__);
1510 struct quatech_port *qt_port;
1511
1512 dbg("%s - port %d\n", __func__, port->number);
1513
1514 if (!serial)
1515 return;
1516
1517 qt_port = qt_get_port_private(port);
1518
1519 mutex_lock(&qt_port->lock);
1520
1521 /* pass on to the driver specific version of this function */
1522 qt_port->RxHolding = 1;
1523 dbg("%s - port->RxHolding = 1\n", __func__);
1524
1525 mutex_unlock(&qt_port->lock);
1526 return;
1527 }
1528
qt_unthrottle(struct tty_struct * tty)1529 static void qt_unthrottle(struct tty_struct *tty)
1530 {
1531 struct usb_serial_port *port = tty->driver_data;
1532 struct usb_serial *serial = get_usb_serial(port, __func__);
1533 struct quatech_port *qt_port;
1534 unsigned int result;
1535
1536 if (!serial)
1537 return;
1538
1539 qt_port = qt_get_port_private(port);
1540
1541 mutex_lock(&qt_port->lock);
1542
1543 dbg("%s - port %d\n", __func__, port->number);
1544
1545 if (qt_port->RxHolding == 1) {
1546 dbg("%s -qt_port->RxHolding == 1\n", __func__);
1547
1548 qt_port->RxHolding = 0;
1549 dbg("%s - qt_port->RxHolding = 0\n", __func__);
1550
1551 /* if we have a bulk endpoint, start it up */
1552 if ((serial->num_bulk_in) && (qt_port->ReadBulkStopped == 1)) {
1553 /* Start reading from the device */
1554 usb_fill_bulk_urb(port->read_urb, serial->dev,
1555 usb_rcvbulkpipe(serial->dev,
1556 port->bulk_in_endpointAddress),
1557 port->read_urb->transfer_buffer,
1558 port->read_urb->
1559 transfer_buffer_length,
1560 qt_read_bulk_callback, port);
1561 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
1562 if (result)
1563 err("%s - failed restarting read urb, error %d",
1564 __func__, result);
1565 }
1566 }
1567 mutex_unlock(&qt_port->lock);
1568 return;
1569
1570 }
1571
qt_calc_num_ports(struct usb_serial * serial)1572 static int qt_calc_num_ports(struct usb_serial *serial)
1573 {
1574 int num_ports;
1575
1576 dbg("numberofendpoints: %d\n",
1577 (int)serial->interface->cur_altsetting->desc.bNumEndpoints);
1578 dbg("numberofendpoints: %d\n",
1579 (int)serial->interface->altsetting->desc.bNumEndpoints);
1580
1581 num_ports =
1582 (serial->interface->cur_altsetting->desc.bNumEndpoints - 1) / 2;
1583
1584 return num_ports;
1585 }
1586
1587 static struct usb_serial_driver quatech_device = {
1588 .driver = {
1589 .owner = THIS_MODULE,
1590 .name = "serqt",
1591 },
1592 .description = DRIVER_DESC,
1593 .usb_driver = &serqt_usb_driver,
1594 .id_table = serqt_id_table,
1595 .num_ports = 8,
1596 .open = qt_open,
1597 .close = qt_close,
1598 .write = qt_write,
1599 .write_room = qt_write_room,
1600 .chars_in_buffer = qt_chars_in_buffer,
1601 .throttle = qt_throttle,
1602 .unthrottle = qt_unthrottle,
1603 .calc_num_ports = qt_calc_num_ports,
1604 .ioctl = qt_ioctl,
1605 .set_termios = qt_set_termios,
1606 .break_ctl = qt_break,
1607 .tiocmget = qt_tiocmget,
1608 .tiocmset = qt_tiocmset,
1609 .attach = qt_startup,
1610 .release = qt_release,
1611 };
1612
serqt_usb_init(void)1613 static int __init serqt_usb_init(void)
1614 {
1615 int retval;
1616
1617 dbg("%s\n", __func__);
1618
1619 /* register with usb-serial */
1620 retval = usb_serial_register(&quatech_device);
1621
1622 if (retval)
1623 goto failed_usb_serial_register;
1624
1625 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1626 DRIVER_DESC "\n");
1627
1628 /* register with usb */
1629
1630 retval = usb_register(&serqt_usb_driver);
1631 if (retval == 0)
1632 return 0;
1633
1634 /* if we're here, usb_register() failed */
1635 usb_serial_deregister(&quatech_device);
1636 failed_usb_serial_register:
1637 return retval;
1638 }
1639
serqt_usb_exit(void)1640 static void __exit serqt_usb_exit(void)
1641 {
1642 usb_deregister(&serqt_usb_driver);
1643 usb_serial_deregister(&quatech_device);
1644 }
1645
1646 module_init(serqt_usb_init);
1647 module_exit(serqt_usb_exit);
1648
1649 MODULE_AUTHOR(DRIVER_AUTHOR);
1650 MODULE_DESCRIPTION(DRIVER_DESC);
1651 MODULE_LICENSE("GPL");
1652
1653 module_param(debug, bool, S_IRUGO | S_IWUSR);
1654 MODULE_PARM_DESC(debug, "Debug enabled or not");
1655