]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blame - drivers/usb/serial/quatech2.c
projects / mirror_ubuntu-bionic-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
USB: quatech2: switch to generic get_icount implementation
[mirror_ubuntu-bionic-kernel.git] / drivers / usb / serial / quatech2.c
CommitLineData
f7a33e60
BP		 1/*
2 * usb-serial driver for Quatech USB 2 devices
3 *
f88e6a30
BP		 4 * Copyright (C) 2012 Bill Pemberton (wfp5p@virginia.edu)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License version 2
8 * as published by the Free Software Foundation.
9 *
f7a33e60
BP		 10 *
11 * These devices all have only 1 bulk in and 1 bulk out that is shared
12 * for all serial ports.
13 *
14 */
15
16#include <asm/unaligned.h>
17#include <linux/errno.h>
18#include <linux/init.h>
19#include <linux/slab.h>
20#include <linux/tty.h>
21#include <linux/tty_driver.h>
22#include <linux/tty_flip.h>
23#include <linux/module.h>
24#include <linux/serial.h>
25#include <linux/usb.h>
26#include <linux/usb/serial.h>
27#include <linux/serial_reg.h>
28#include <linux/uaccess.h>
29
f7a33e60
BP		 30/* default urb timeout for usb operations */
31#define QT2_USB_TIMEOUT USB_CTRL_SET_TIMEOUT
32
33#define QT_OPEN_CLOSE_CHANNEL 0xca
34#define QT_SET_GET_DEVICE 0xc2
35#define QT_SET_GET_REGISTER 0xc0
36#define QT_GET_SET_PREBUF_TRIG_LVL 0xcc
37#define QT_SET_ATF 0xcd
38#define QT_TRANSFER_IN 0xc0
39#define QT_HW_FLOW_CONTROL_MASK 0xc5
40#define QT_SW_FLOW_CONTROL_MASK 0xc6
41#define QT2_BREAK_CONTROL 0xc8
42#define QT2_GET_SET_UART 0xc1
43#define QT2_FLUSH_DEVICE 0xc4
44#define QT2_GET_SET_QMCR 0xe1
45#define QT2_QMCR_RS232 0x40
46#define QT2_QMCR_RS422 0x10
47
48#define SERIAL_CRTSCTS ((UART_MCR_RTS << 8) | UART_MSR_CTS)
49
50#define SERIAL_EVEN_PARITY (UART_LCR_PARITY | UART_LCR_EPAR)
51
52/* status bytes for the device */
53#define QT2_CONTROL_BYTE 0x1b
54#define QT2_LINE_STATUS 0x00 /* following 1 byte is line status */
55#define QT2_MODEM_STATUS 0x01 /* following 1 byte is modem status */
56#define QT2_XMIT_HOLD 0x02 /* following 2 bytes are ?? */
57#define QT2_CHANGE_PORT 0x03 /* following 1 byte is port to change to */
58#define QT2_REC_FLUSH 0x04 /* no following info */
59#define QT2_XMIT_FLUSH 0x05 /* no following info */
60#define QT2_CONTROL_ESCAPE 0xff /* pass through previous 2 control bytes */
61
62#define MAX_BAUD_RATE 921600
63#define DEFAULT_BAUD_RATE 9600
64
65#define QT2_WRITE_BUFFER_SIZE 512 /* size of write buffer */
66#define QT2_WRITE_CONTROL_SIZE 5 /* control bytes used for a write */
67
f7a33e60
BP		 68#define DRIVER_DESC "Quatech 2nd gen USB to Serial Driver"
69
70#define USB_VENDOR_ID_QUATECH 0x061d
71#define QUATECH_SSU2_100 0xC120 /* RS232 single port */
72#define QUATECH_DSU2_100 0xC140 /* RS232 dual port */
73#define QUATECH_DSU2_400 0xC150 /* RS232/422/485 dual port */
74#define QUATECH_QSU2_100 0xC160 /* RS232 four port */
75#define QUATECH_QSU2_400 0xC170 /* RS232/422/485 four port */
76#define QUATECH_ESU2_100 0xC1A0 /* RS232 eight port */
77#define QUATECH_ESU2_400 0xC180 /* RS232/422/485 eight port */
78
79struct qt2_device_detail {
80 int product_id;
81 int num_ports;
82};
83
84#define QT_DETAILS(prod, ports) \
85 .product_id = (prod), \
86 .num_ports = (ports)
87
88static const struct qt2_device_detail qt2_device_details[] = {
89 {QT_DETAILS(QUATECH_SSU2_100, 1)},
90 {QT_DETAILS(QUATECH_DSU2_400, 2)},
91 {QT_DETAILS(QUATECH_DSU2_100, 2)},
92 {QT_DETAILS(QUATECH_QSU2_400, 4)},
93 {QT_DETAILS(QUATECH_QSU2_100, 4)},
94 {QT_DETAILS(QUATECH_ESU2_400, 8)},
95 {QT_DETAILS(QUATECH_ESU2_100, 8)},
96 {QT_DETAILS(0, 0)} /* Terminating entry */
97};
98
99static const struct usb_device_id id_table[] = {
100 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU2_100)},
101 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU2_100)},
102 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU2_400)},
103 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU2_100)},
104 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU2_400)},
105 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU2_100)},
106 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU2_400)},
107 {} /* Terminating entry */
108};
109MODULE_DEVICE_TABLE(usb, id_table);
110
111struct qt2_serial_private {
112 unsigned char current_port; /* current port for incoming data */
113
114 struct urb *read_urb; /* shared among all ports */
115 char read_buffer[512];
116};
117
118struct qt2_port_private {
119 bool is_open;
120 u8 device_port;
121
122 spinlock_t urb_lock;
123 bool urb_in_use;
124 struct urb *write_urb;
125 char write_buffer[QT2_WRITE_BUFFER_SIZE];
126
127 spinlock_t lock;
128 u8 shadowLSR;
129 u8 shadowMSR;
130
f7a33e60
BP		 131 struct usb_serial_port *port;
132};
133
134static void qt2_update_lsr(struct usb_serial_port *port, unsigned char *ch);
135static void qt2_update_msr(struct usb_serial_port *port, unsigned char *ch);
136static void qt2_write_bulk_callback(struct urb *urb);
137static void qt2_read_bulk_callback(struct urb *urb);
138
139static void qt2_release(struct usb_serial *serial)
140{
40d04738 141 struct qt2_serial_private *serial_priv;
f7a33e60 142
40d04738 143 serial_priv = usb_get_serial_data(serial);
f7a33e60 144
40d04738
JH		 145 usb_free_urb(serial_priv->read_urb);
146 kfree(serial_priv);
f7a33e60
BP		 147}
148
149static inline int calc_baud_divisor(int baudrate)
150{
151 int divisor, rem;
152
153 divisor = MAX_BAUD_RATE / baudrate;
154 rem = MAX_BAUD_RATE % baudrate;
155 /* Round to nearest divisor */
156 if (((rem * 2) >= baudrate) && (baudrate != 110))
157 divisor++;
158
159 return divisor;
160}
161
162static inline int qt2_set_port_config(struct usb_device *dev,
163 unsigned char port_number,
164 u16 baudrate, u16 lcr)
165{
166 int divisor = calc_baud_divisor(baudrate);
167 u16 index = ((u16) (lcr << 8) | (u16) (port_number));
168
169 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
170 QT2_GET_SET_UART, 0x40,
171 divisor, index, NULL, 0, QT2_USB_TIMEOUT);
172}
173
174static inline int qt2_control_msg(struct usb_device *dev,
175 u8 request, u16 data, u16 index)
176{
177 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
178 request, 0x40, data, index,
179 NULL, 0, QT2_USB_TIMEOUT);
180}
181
182static inline int qt2_setdevice(struct usb_device *dev, u8 *data)
183{
184 u16 x = ((u16) (data[1] << 8) | (u16) (data[0]));
185
186 return qt2_control_msg(dev, QT_SET_GET_DEVICE, x, 0);
187}
188
189
190static inline int qt2_getdevice(struct usb_device *dev, u8 *data)
191{
192 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
193 QT_SET_GET_DEVICE, 0xc0, 0, 0,
194 data, 3, QT2_USB_TIMEOUT);
195}
196
197static inline int qt2_getregister(struct usb_device *dev,
198 u8 uart,
199 u8 reg,
200 u8 *data)
201{
202 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
203 QT_SET_GET_REGISTER, 0xc0, reg,
204 uart, data, sizeof(*data), QT2_USB_TIMEOUT);
205
206}
207
208static inline int qt2_setregister(struct usb_device *dev,
209 u8 uart, u8 reg, u16 data)
210{
211 u16 value = (data << 8) | reg;
212
213 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
214 QT_SET_GET_REGISTER, 0x40, value, uart,
215 NULL, 0, QT2_USB_TIMEOUT);
216}
217
218static inline int update_mctrl(struct qt2_port_private *port_priv,
219 unsigned int set, unsigned int clear)
220{
221 struct usb_serial_port *port = port_priv->port;
222 struct usb_device *dev = port->serial->dev;
223 unsigned urb_value;
224 int status;
225
226 if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) {
227 dev_dbg(&port->dev,
228 "update_mctrl - DTR|RTS not being set|cleared\n");
229 return 0; /* no change */
230 }
231
232 clear &= ~set; /* 'set' takes precedence over 'clear' */
233 urb_value = 0;
234 if (set & TIOCM_DTR)
235 urb_value |= UART_MCR_DTR;
236 if (set & TIOCM_RTS)
237 urb_value |= UART_MCR_RTS;
238
239 status = qt2_setregister(dev, port_priv->device_port, UART_MCR,
240 urb_value);
241 if (status < 0)
242 dev_err(&port->dev,
243 "update_mctrl - Error from MODEM_CTRL urb: %i\n",
244 status);
245 return status;
246}
247
248static int qt2_calc_num_ports(struct usb_serial *serial)
249{
250 struct qt2_device_detail d;
251 int i;
252
253 for (i = 0; d = qt2_device_details[i], d.product_id != 0; i++) {
254 if (d.product_id == le16_to_cpu(serial->dev->descriptor.idProduct))
255 return d.num_ports;
256 }
257
258 /* we didn't recognize the device */
259 dev_err(&serial->dev->dev,
260 "don't know the number of ports, assuming 1\n");
261
262 return 1;
263}
264
265static void qt2_set_termios(struct tty_struct *tty,
266 struct usb_serial_port *port,
267 struct ktermios *old_termios)
268{
269 struct usb_device *dev = port->serial->dev;
270 struct qt2_port_private *port_priv;
adc8d746 271 struct ktermios *termios = &tty->termios;
f7a33e60
BP		 272 u16 baud;
273 unsigned int cflag = termios->c_cflag;
274 u16 new_lcr = 0;
275 int status;
276
277 port_priv = usb_get_serial_port_data(port);
278
279 if (cflag & PARENB) {
280 if (cflag & PARODD)
281 new_lcr |= UART_LCR_PARITY;
282 else
283 new_lcr |= SERIAL_EVEN_PARITY;
284 }
285
286 switch (cflag & CSIZE) {
287 case CS5:
288 new_lcr |= UART_LCR_WLEN5;
289 break;
290 case CS6:
291 new_lcr |= UART_LCR_WLEN6;
292 break;
293 case CS7:
294 new_lcr |= UART_LCR_WLEN7;
295 break;
296 default:
297 case CS8:
298 new_lcr |= UART_LCR_WLEN8;
299 break;
300 }
301
302 baud = tty_get_baud_rate(tty);
303 if (!baud)
304 baud = 9600;
305
306 status = qt2_set_port_config(dev, port_priv->device_port, baud,
307 new_lcr);
308 if (status < 0)
309 dev_err(&port->dev, "%s - qt2_set_port_config failed: %i\n",
310 __func__, status);
311
312 if (cflag & CRTSCTS)
313 status = qt2_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
314 SERIAL_CRTSCTS,
315 port_priv->device_port);
316 else
317 status = qt2_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
318 0, port_priv->device_port);
319 if (status < 0)
320 dev_err(&port->dev, "%s - set HW flow control failed: %i\n",
321 __func__, status);
322
323 if (I_IXOFF(tty) || I_IXON(tty)) {
324 u16 x = ((u16) (START_CHAR(tty) << 8) | (u16) (STOP_CHAR(tty)));
325
326 status = qt2_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
327 x, port_priv->device_port);
328 } else
329 status = qt2_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
330 0, port_priv->device_port);
331
332 if (status < 0)
333 dev_err(&port->dev, "%s - set SW flow control failed: %i\n",
334 __func__, status);
335
336}
337
338static int qt2_open(struct tty_struct *tty, struct usb_serial_port *port)
339{
340 struct usb_serial *serial;
f7a33e60
BP		 341 struct qt2_port_private *port_priv;
342 u8 *data;
343 u16 device_port;
344 int status;
345 unsigned long flags;
346
347 device_port = (u16) (port->number - port->serial->minor);
348
349 serial = port->serial;
350
351 port_priv = usb_get_serial_port_data(port);
f7a33e60
BP		 352
353 /* set the port to RS232 mode */
354 status = qt2_control_msg(serial->dev, QT2_GET_SET_QMCR,
355 QT2_QMCR_RS232, device_port);
356 if (status < 0) {
357 dev_err(&port->dev,
358 "%s failed to set RS232 mode for port %i error %i\n",
359 __func__, device_port, status);
360 return status;
361 }
362
363 data = kzalloc(2, GFP_KERNEL);
364 if (!data)
365 return -ENOMEM;
366
367 /* open the port */
368 status = usb_control_msg(serial->dev,
369 usb_rcvctrlpipe(serial->dev, 0),
370 QT_OPEN_CLOSE_CHANNEL,
371 0xc0, 0,
372 device_port, data, 2, QT2_USB_TIMEOUT);
373
374 if (status < 0) {
375 dev_err(&port->dev, "%s - open port failed %i", __func__,
376 status);
377 kfree(data);
378 return status;
379 }
380
381 spin_lock_irqsave(&port_priv->lock, flags);
382 port_priv->shadowLSR = data[0];
383 port_priv->shadowMSR = data[1];
384 spin_unlock_irqrestore(&port_priv->lock, flags);
385
386 kfree(data);
387
388 /* set to default speed and 8bit word size */
389 status = qt2_set_port_config(serial->dev, device_port,
390 DEFAULT_BAUD_RATE, UART_LCR_WLEN8);
391 if (status < 0) {
392 dev_err(&port->dev,
393 "%s - initial setup failed for port %i (%i)\n",
394 __func__, port->number, device_port);
395 return status;
396 }
397
398 port_priv->is_open = true;
399 port_priv->device_port = (u8) device_port;
400
401 if (tty)
adc8d746 402 qt2_set_termios(tty, port, &tty->termios);
f7a33e60
BP		 403
404 return 0;
405
406}
407
408static void qt2_close(struct usb_serial_port *port)
409{
410 struct usb_serial *serial;
f7a33e60
BP		 411 struct qt2_port_private *port_priv;
412 unsigned long flags;
413 int i;
414
415 serial = port->serial;
f7a33e60
BP		 416 port_priv = usb_get_serial_port_data(port);
417
418 port_priv->is_open = false;
419
420 spin_lock_irqsave(&port_priv->urb_lock, flags);
8e512ab0 421 usb_kill_urb(port_priv->write_urb);
f7a33e60
BP		 422 port_priv->urb_in_use = false;
423 spin_unlock_irqrestore(&port_priv->urb_lock, flags);
424
2f0295ad
JH		 425 mutex_lock(&port->serial->disc_mutex);
426 if (port->serial->disconnected) {
427 mutex_unlock(&port->serial->disc_mutex);
428 return;
429 }
430
f7a33e60
BP		 431 /* flush the port transmit buffer */
432 i = usb_control_msg(serial->dev,
433 usb_rcvctrlpipe(serial->dev, 0),
434 QT2_FLUSH_DEVICE, 0x40, 1,
435 port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT);
436
437 if (i < 0)
438 dev_err(&port->dev, "%s - transmit buffer flush failed: %i\n",
439 __func__, i);
440
441 /* flush the port receive buffer */
442 i = usb_control_msg(serial->dev,
443 usb_rcvctrlpipe(serial->dev, 0),
444 QT2_FLUSH_DEVICE, 0x40, 0,
445 port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT);
446
447 if (i < 0)
448 dev_err(&port->dev, "%s - receive buffer flush failed: %i\n",
449 __func__, i);
450
451 /* close the port */
452 i = usb_control_msg(serial->dev,
453 usb_sndctrlpipe(serial->dev, 0),
454 QT_OPEN_CLOSE_CHANNEL,
455 0x40, 0,
456 port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT);
457
458 if (i < 0)
459 dev_err(&port->dev, "%s - close port failed %i\n",
460 __func__, i);
461
2f0295ad 462 mutex_unlock(&port->serial->disc_mutex);
f7a33e60
BP		 463}
464
465static void qt2_disconnect(struct usb_serial *serial)
466{
467 struct qt2_serial_private *serial_priv = usb_get_serial_data(serial);
f7a33e60 468
8e512ab0 469 usb_kill_urb(serial_priv->read_urb);
f7a33e60
BP		 470}
471
472static int get_serial_info(struct usb_serial_port *port,
473 struct serial_struct __user *retinfo)
474{
475 struct serial_struct tmp;
476
477 if (!retinfo)
478 return -EFAULT;
479
480 memset(&tmp, 0, sizeof(tmp));
481 tmp.line = port->serial->minor;
482 tmp.port = 0;
483 tmp.irq = 0;
484 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
485 tmp.xmit_fifo_size = port->bulk_out_size;
486 tmp.baud_base = 9600;
487 tmp.close_delay = 5*HZ;
488 tmp.closing_wait = 30*HZ;
489
490 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
491 return -EFAULT;
492 return 0;
493}
494
495static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
496{
497 struct qt2_port_private *priv = usb_get_serial_port_data(port);
498 struct async_icount prev, cur;
499 unsigned long flags;
500
501 spin_lock_irqsave(&priv->lock, flags);
0a4142fb 502 prev = port->icount;
f7a33e60
BP		 503 spin_unlock_irqrestore(&priv->lock, flags);
504
505 while (1) {
69f87f40
JH		 506 wait_event_interruptible(port->delta_msr_wait,
507 (port->serial->disconnected ||
0a4142fb
JH		 508 (port->icount.rng != prev.rng) ||
509 (port->icount.dsr != prev.dsr) ||
510 (port->icount.dcd != prev.dcd) ||
511 (port->icount.cts != prev.cts)));
f7a33e60
BP		 512
513 if (signal_pending(current))
514 return -ERESTARTSYS;
515
69f87f40
JH		 516 if (port->serial->disconnected)
517 return -EIO;
518
f7a33e60 519 spin_lock_irqsave(&priv->lock, flags);
0a4142fb 520 cur = port->icount;
f7a33e60
BP		 521 spin_unlock_irqrestore(&priv->lock, flags);
522
523 if ((prev.rng == cur.rng) &&
524 (prev.dsr == cur.dsr) &&
525 (prev.dcd == cur.dcd) &&
526 (prev.cts == cur.cts))
527 return -EIO;
528
529 if ((arg & TIOCM_RNG && (prev.rng != cur.rng)) ||
530 (arg & TIOCM_DSR && (prev.dsr != cur.dsr)) ||
531 (arg & TIOCM_CD && (prev.dcd != cur.dcd)) ||
532 (arg & TIOCM_CTS && (prev.cts != cur.cts)))
533 return 0;
534 }
535 return 0;
536}
537
f7a33e60
BP		 538static int qt2_ioctl(struct tty_struct *tty,
539 unsigned int cmd, unsigned long arg)
540{
541 struct usb_serial_port *port = tty->driver_data;
542
543 switch (cmd) {
544 case TIOCGSERIAL:
545 return get_serial_info(port,
546 (struct serial_struct __user *)arg);
547
548 case TIOCMIWAIT:
549 return wait_modem_info(port, arg);
550
551 default:
552 break;
553 }
554
555 return -ENOIOCTLCMD;
556}
557
558static void qt2_process_status(struct usb_serial_port *port, unsigned char *ch)
559{
560 switch (*ch) {
561 case QT2_LINE_STATUS:
562 qt2_update_lsr(port, ch + 1);
563 break;
564 case QT2_MODEM_STATUS:
565 qt2_update_msr(port, ch + 1);
566 break;
567 }
568}
569
570/* not needed, kept to document functionality */
571static void qt2_process_xmit_empty(struct usb_serial_port *port,
572 unsigned char *ch)
573{
574 int bytes_written;
575
576 bytes_written = (int)(*ch) + (int)(*(ch + 1) << 4);
577}
578
579/* not needed, kept to document functionality */
580static void qt2_process_flush(struct usb_serial_port *port, unsigned char *ch)
581{
582 return;
583}
584
585void qt2_process_read_urb(struct urb *urb)
586{
587 struct usb_serial *serial;
588 struct qt2_serial_private *serial_priv;
589 struct usb_serial_port *port;
590 struct qt2_port_private *port_priv;
f7a33e60
BP		 591 bool escapeflag;
592 unsigned char *ch;
593 int i;
594 unsigned char newport;
595 int len = urb->actual_length;
596
597 if (!len)
598 return;
599
600 ch = urb->transfer_buffer;
f7a33e60
BP		 601 serial = urb->context;
602 serial_priv = usb_get_serial_data(serial);
603 port = serial->port[serial_priv->current_port];
604 port_priv = usb_get_serial_port_data(port);
605
f7a33e60
BP		 606 for (i = 0; i < urb->actual_length; i++) {
607 ch = (unsigned char *)urb->transfer_buffer + i;
608 if ((i <= (len - 3)) &&
609 (*ch == QT2_CONTROL_BYTE) &&
610 (*(ch + 1) == QT2_CONTROL_BYTE)) {
611 escapeflag = false;
612 switch (*(ch + 2)) {
613 case QT2_LINE_STATUS:
614 case QT2_MODEM_STATUS:
615 if (i > (len - 4)) {
616 dev_warn(&port->dev,
617 "%s - status message too short\n",
618 __func__);
619 break;
620 }
621 qt2_process_status(port, ch + 2);
622 i += 3;
623 escapeflag = true;
624 break;
625 case QT2_XMIT_HOLD:
626 if (i > (len - 5)) {
627 dev_warn(&port->dev,
628 "%s - xmit_empty message too short\n",
629 __func__);
630 break;
631 }
632 qt2_process_xmit_empty(port, ch + 3);
633 i += 4;
634 escapeflag = true;
635 break;
636 case QT2_CHANGE_PORT:
637 if (i > (len - 4)) {
638 dev_warn(&port->dev,
639 "%s - change_port message too short\n",
640 __func__);
641 break;
642 }
29727f3b 643 tty_flip_buffer_push(&port->port);
f7a33e60
BP		 644
645 newport = *(ch + 3);
646
647 if (newport > serial->num_ports) {
648 dev_err(&port->dev,
649 "%s - port change to invalid port: %i\n",
650 __func__, newport);
651 break;
652 }
653
654 serial_priv->current_port = newport;
655 port = serial->port[serial_priv->current_port];
656 port_priv = usb_get_serial_port_data(port);
f7a33e60
BP		 657 i += 3;
658 escapeflag = true;
659 break;
660 case QT2_REC_FLUSH:
661 case QT2_XMIT_FLUSH:
662 qt2_process_flush(port, ch + 2);
663 i += 2;
664 escapeflag = true;
665 break;
666 case QT2_CONTROL_ESCAPE:
227434f8 667 tty_buffer_request_room(&port->port, 2);
05c7cd39 668 tty_insert_flip_string(&port->port, ch, 2);
f7a33e60
BP		 669 i += 2;
670 escapeflag = true;
671 break;
672 default:
673 dev_warn(&port->dev,
674 "%s - unsupported command %i\n",
675 __func__, *(ch + 2));
676 break;
677 }
678 if (escapeflag)
679 continue;
680 }
681
05c7cd39
JS		 682 tty_buffer_request_room(&port->port, 1);
683 tty_insert_flip_string(&port->port, ch, 1);
f7a33e60
BP		 684 }
685
29727f3b 686 tty_flip_buffer_push(&port->port);
f7a33e60
BP		 687}
688
689static void qt2_write_bulk_callback(struct urb *urb)
690{
691 struct usb_serial_port *port;
692 struct qt2_port_private *port_priv;
693
694 port = urb->context;
695 port_priv = usb_get_serial_port_data(port);
696
697 spin_lock(&port_priv->urb_lock);
698
699 port_priv->urb_in_use = false;
700 usb_serial_port_softint(port);
701
702 spin_unlock(&port_priv->urb_lock);
703
704}
705
706static void qt2_read_bulk_callback(struct urb *urb)
707{
708 struct usb_serial *serial = urb->context;
709 int status;
710
711 if (urb->status) {
712 dev_warn(&serial->dev->dev,
713 "%s - non-zero urb status: %i\n", __func__,
714 urb->status);
715 return;
716 }
717
718 qt2_process_read_urb(urb);
719
720 status = usb_submit_urb(urb, GFP_ATOMIC);
721 if (status != 0)
722 dev_err(&serial->dev->dev,
723 "%s - resubmit read urb failed: %i\n",
724 __func__, status);
725}
726
727static int qt2_setup_urbs(struct usb_serial *serial)
728{
f7a33e60
BP		 729 struct usb_serial_port *port0;
730 struct qt2_serial_private *serial_priv;
40d04738 731 int status;
f7a33e60
BP		 732
733 port0 = serial->port[0];
734
735 serial_priv = usb_get_serial_data(serial);
736 serial_priv->read_urb = usb_alloc_urb(0, GFP_KERNEL);
737 if (!serial_priv->read_urb) {
738 dev_err(&serial->dev->dev, "No free urbs available\n");
739 return -ENOMEM;
740 }
741
742 usb_fill_bulk_urb(serial_priv->read_urb, serial->dev,
743 usb_rcvbulkpipe(serial->dev,
744 port0->bulk_in_endpointAddress),
745 serial_priv->read_buffer,
746 sizeof(serial_priv->read_buffer),
747 qt2_read_bulk_callback, serial);
748
f7a33e60
BP		 749 status = usb_submit_urb(serial_priv->read_urb, GFP_KERNEL);
750 if (status != 0) {
751 dev_err(&serial->dev->dev,
752 "%s - submit read urb failed %i\n", __func__, status);
b8a00550 753 usb_free_urb(serial_priv->read_urb);
f7a33e60
BP		 754 return status;
755 }
756
757 return 0;
f7a33e60
BP		 758}
759
760static int qt2_attach(struct usb_serial *serial)
761{
762 struct qt2_serial_private *serial_priv;
40d04738 763 int status;
f7a33e60
BP		 764
765 /* power on unit */
766 status = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
767 0xc2, 0x40, 0x8000, 0, NULL, 0,
768 QT2_USB_TIMEOUT);
769 if (status < 0) {
770 dev_err(&serial->dev->dev,
771 "%s - failed to power on unit: %i\n", __func__, status);
772 return status;
773 }
774
775 serial_priv = kzalloc(sizeof(*serial_priv), GFP_KERNEL);
776 if (!serial_priv) {
777 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
778 return -ENOMEM;
779 }
780
781 usb_set_serial_data(serial, serial_priv);
782
f7a33e60
BP		 783 status = qt2_setup_urbs(serial);
784 if (status != 0)
785 goto attach_failed;
786
787 return 0;
788
789attach_failed:
f7a33e60
BP		 790 kfree(serial_priv);
791 return status;
792}
793
40d04738
JH		 794static int qt2_port_probe(struct usb_serial_port *port)
795{
796 struct usb_serial *serial = port->serial;
797 struct qt2_port_private *port_priv;
798 u8 bEndpointAddress;
799
800 port_priv = kzalloc(sizeof(*port_priv), GFP_KERNEL);
801 if (!port_priv)
802 return -ENOMEM;
803
804 spin_lock_init(&port_priv->lock);
805 spin_lock_init(&port_priv->urb_lock);
40d04738
JH		 806 port_priv->port = port;
807
808 port_priv->write_urb = usb_alloc_urb(0, GFP_KERNEL);
809 if (!port_priv->write_urb) {
810 kfree(port_priv);
811 return -ENOMEM;
812 }
813 bEndpointAddress = serial->port[0]->bulk_out_endpointAddress;
814 usb_fill_bulk_urb(port_priv->write_urb, serial->dev,
815 usb_sndbulkpipe(serial->dev, bEndpointAddress),
816 port_priv->write_buffer,
817 sizeof(port_priv->write_buffer),
818 qt2_write_bulk_callback, port);
819
820 usb_set_serial_port_data(port, port_priv);
821
822 return 0;
823}
824
825static int qt2_port_remove(struct usb_serial_port *port)
826{
827 struct qt2_port_private *port_priv;
828
829 port_priv = usb_get_serial_port_data(port);
830 usb_free_urb(port_priv->write_urb);
831 kfree(port_priv);
832
833 return 0;
834}
835
f7a33e60
BP		 836static int qt2_tiocmget(struct tty_struct *tty)
837{
838 struct usb_serial_port *port = tty->driver_data;
839 struct usb_device *dev = port->serial->dev;
840 struct qt2_port_private *port_priv = usb_get_serial_port_data(port);
841 u8 *d;
842 int r;
843
844 d = kzalloc(2, GFP_KERNEL);
845 if (!d)
846 return -ENOMEM;
847
848 r = qt2_getregister(dev, port_priv->device_port, UART_MCR, d);
849 if (r < 0)
850 goto mget_out;
851
852 r = qt2_getregister(dev, port_priv->device_port, UART_MSR, d + 1);
853 if (r < 0)
854 goto mget_out;
855
856 r = (d[0] & UART_MCR_DTR ? TIOCM_DTR : 0) |
857 (d[0] & UART_MCR_RTS ? TIOCM_RTS : 0) |
858 (d[1] & UART_MSR_CTS ? TIOCM_CTS : 0) |
859 (d[1] & UART_MSR_DCD ? TIOCM_CAR : 0) |
860 (d[1] & UART_MSR_RI ? TIOCM_RI : 0) |
861 (d[1] & UART_MSR_DSR ? TIOCM_DSR : 0);
862
863mget_out:
864 kfree(d);
865 return r;
866}
867
868static int qt2_tiocmset(struct tty_struct *tty,
869 unsigned int set, unsigned int clear)
870{
871 struct qt2_port_private *port_priv;
872
873 port_priv = usb_get_serial_port_data(tty->driver_data);
874 return update_mctrl(port_priv, set, clear);
875}
876
877static void qt2_break_ctl(struct tty_struct *tty, int break_state)
878{
879 struct usb_serial_port *port = tty->driver_data;
880 struct qt2_port_private *port_priv;
881 int status;
882 u16 val;
883
884 port_priv = usb_get_serial_port_data(port);
885
886 if (!port_priv->is_open) {
887 dev_err(&port->dev,
888 "%s - port is not open\n", __func__);
889 return;
890 }
891
892 val = (break_state == -1) ? 1 : 0;
893
894 status = qt2_control_msg(port->serial->dev, QT2_BREAK_CONTROL,
895 val, port_priv->device_port);
896 if (status < 0)
897 dev_warn(&port->dev,
898 "%s - failed to send control message: %i\n", __func__,
899 status);
900}
901
902
903
904static void qt2_dtr_rts(struct usb_serial_port *port, int on)
905{
906 struct usb_device *dev = port->serial->dev;
907 struct qt2_port_private *port_priv = usb_get_serial_port_data(port);
908
b2ca6990
JH		 909 /* Disable flow control */
910 if (!on) {
911 if (qt2_setregister(dev, port_priv->device_port,
f7a33e60
BP		 912 UART_MCR, 0) < 0)
913 dev_warn(&port->dev, "error from flowcontrol urb\n");
f7a33e60 914 }
b2ca6990
JH		 915 /* drop RTS and DTR */
916 if (on)
917 update_mctrl(port_priv, TIOCM_DTR | TIOCM_RTS, 0);
918 else
919 update_mctrl(port_priv, 0, TIOCM_DTR | TIOCM_RTS);
f7a33e60
BP		 920}
921
922static void qt2_update_msr(struct usb_serial_port *port, unsigned char *ch)
923{
924 struct qt2_port_private *port_priv;
925 u8 newMSR = (u8) *ch;
926 unsigned long flags;
927
928 port_priv = usb_get_serial_port_data(port);
929
930 spin_lock_irqsave(&port_priv->lock, flags);
931 port_priv->shadowMSR = newMSR;
932 spin_unlock_irqrestore(&port_priv->lock, flags);
933
934 if (newMSR & UART_MSR_ANY_DELTA) {
935 /* update input line counters */
936 if (newMSR & UART_MSR_DCTS)
0a4142fb 937 port->icount.cts++;
f7a33e60 938 if (newMSR & UART_MSR_DDSR)
0a4142fb 939 port->icount.dsr++;
f7a33e60 940 if (newMSR & UART_MSR_DDCD)
0a4142fb 941 port->icount.dcd++;
f7a33e60 942 if (newMSR & UART_MSR_TERI)
0a4142fb 943 port->icount.rng++;
f7a33e60 944
69f87f40 945 wake_up_interruptible(&port->delta_msr_wait);
f7a33e60
BP		 946 }
947}
948
949static void qt2_update_lsr(struct usb_serial_port *port, unsigned char *ch)
950{
951 struct qt2_port_private *port_priv;
952 struct async_icount *icount;
953 unsigned long flags;
954 u8 newLSR = (u8) *ch;
955
956 port_priv = usb_get_serial_port_data(port);
957
958 if (newLSR & UART_LSR_BI)
959 newLSR &= (u8) (UART_LSR_OE | UART_LSR_BI);
960
961 spin_lock_irqsave(&port_priv->lock, flags);
962 port_priv->shadowLSR = newLSR;
963 spin_unlock_irqrestore(&port_priv->lock, flags);
964
0a4142fb 965 icount = &port->icount;
f7a33e60
BP		 966
967 if (newLSR & UART_LSR_BRK_ERROR_BITS) {
968
969 if (newLSR & UART_LSR_BI)
970 icount->brk++;
971
972 if (newLSR & UART_LSR_OE)
973 icount->overrun++;
974
975 if (newLSR & UART_LSR_PE)
976 icount->parity++;
977
978 if (newLSR & UART_LSR_FE)
979 icount->frame++;
980 }
981
982}
983
984static int qt2_write_room(struct tty_struct *tty)
985{
986 struct usb_serial_port *port = tty->driver_data;
987 struct qt2_port_private *port_priv;
988 unsigned long flags = 0;
989 int r;
990
991 port_priv = usb_get_serial_port_data(port);
992
993 spin_lock_irqsave(&port_priv->urb_lock, flags);
994
995 if (port_priv->urb_in_use)
996 r = 0;
997 else
998 r = QT2_WRITE_BUFFER_SIZE - QT2_WRITE_CONTROL_SIZE;
999
1000 spin_unlock_irqrestore(&port_priv->urb_lock, flags);
1001
1002 return r;
1003}
1004
1005static int qt2_write(struct tty_struct *tty,
1006 struct usb_serial_port *port,
1007 const unsigned char *buf, int count)
1008{
1009 struct qt2_port_private *port_priv;
1010 struct urb *write_urb;
1011 unsigned char *data;
1012 unsigned long flags;
1013 int status;
1014 int bytes_out = 0;
1015
1016 port_priv = usb_get_serial_port_data(port);
1017
1018 if (port_priv->write_urb == NULL) {
1019 dev_err(&port->dev, "%s - no output urb\n", __func__);
1020 return 0;
1021 }
1022 write_urb = port_priv->write_urb;
1023
1024 count = min(count, QT2_WRITE_BUFFER_SIZE - QT2_WRITE_CONTROL_SIZE);
1025
1026 data = write_urb->transfer_buffer;
1027 spin_lock_irqsave(&port_priv->urb_lock, flags);
1028 if (port_priv->urb_in_use == true) {
788a661a 1029 dev_err(&port->dev, "qt2_write - urb is in use\n");
f7a33e60
BP		 1030 goto write_out;
1031 }
1032
1033 *data++ = QT2_CONTROL_BYTE;
1034 *data++ = QT2_CONTROL_BYTE;
1035 *data++ = port_priv->device_port;
1036 put_unaligned_le16(count, data);
1037 data += 2;
1038 memcpy(data, buf, count);
1039
1040 write_urb->transfer_buffer_length = count + QT2_WRITE_CONTROL_SIZE;
1041
1042 status = usb_submit_urb(write_urb, GFP_ATOMIC);
1043 if (status == 0) {
1044 port_priv->urb_in_use = true;
1045 bytes_out += count;
1046 }
1047
1048write_out:
1049 spin_unlock_irqrestore(&port_priv->urb_lock, flags);
1050 return bytes_out;
1051}
1052
1053
1054static struct usb_serial_driver qt2_device = {
1055 .driver = {
1056 .owner = THIS_MODULE,
1057 .name = "quatech-serial",
1058 },
1059 .description = DRIVER_DESC,
1060 .id_table = id_table,
1061 .open = qt2_open,
1062 .close = qt2_close,
1063 .write = qt2_write,
1064 .write_room = qt2_write_room,
1065 .calc_num_ports = qt2_calc_num_ports,
1066 .attach = qt2_attach,
1067 .release = qt2_release,
1068 .disconnect = qt2_disconnect,
40d04738
JH		 1069 .port_probe = qt2_port_probe,
1070 .port_remove = qt2_port_remove,
f7a33e60
BP		 1071 .dtr_rts = qt2_dtr_rts,
1072 .break_ctl = qt2_break_ctl,
1073 .tiocmget = qt2_tiocmget,
1074 .tiocmset = qt2_tiocmset,
0a4142fb 1075 .get_icount = usb_serial_generic_get_icount,
f7a33e60
BP		 1076 .ioctl = qt2_ioctl,
1077 .set_termios = qt2_set_termios,
1078};
1079
1080static struct usb_serial_driver *const serial_drivers[] = {
1081 &qt2_device, NULL
1082};
1083
1084module_usb_serial_driver(serial_drivers, id_table);
1085
1086MODULE_DESCRIPTION(DRIVER_DESC);
1087MODULE_LICENSE("GPL");
ubuntu-bionic-kernel mirror