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14#include <linux/kernel.h>
15#include <linux/errno.h>
16#include <linux/slab.h>
17#include <linux/tty.h>
18#include <linux/tty_driver.h>
19#include <linux/tty_flip.h>
20#include <linux/module.h>
21#include <linux/spinlock.h>
22#include <linux/uaccess.h>
23#include <linux/usb.h>
24#include <linux/wait.h>
25#include <linux/sched/signal.h>
26#include <linux/usb/serial.h>
27
28
29
30#define DRIVER_AUTHOR "Peter Berger <pberger@brimson.com>, Al Borchers <borchers@steinerpoint.com>"
31#define DRIVER_DESC "Digi AccelePort USB-2/USB-4 Serial Converter driver"
32
33
34
35#define DIGI_OUT_BUF_SIZE 8
36
37
38
39#define DIGI_IN_BUF_SIZE 64
40
41
42#define DIGI_RETRY_TIMEOUT (HZ/10)
43
44
45
46
47#define DIGI_CLOSE_TIMEOUT (5*HZ)
48
49
50
51
52
53#define DIGI_VENDOR_ID 0x05c5
54#define DIGI_2_ID 0x0002
55#define DIGI_4_ID 0x0004
56
57
58
59
60
61#define DIGI_CMD_SET_BAUD_RATE 0
62#define DIGI_CMD_SET_WORD_SIZE 1
63#define DIGI_CMD_SET_PARITY 2
64#define DIGI_CMD_SET_STOP_BITS 3
65#define DIGI_CMD_SET_INPUT_FLOW_CONTROL 4
66#define DIGI_CMD_SET_OUTPUT_FLOW_CONTROL 5
67#define DIGI_CMD_SET_DTR_SIGNAL 6
68#define DIGI_CMD_SET_RTS_SIGNAL 7
69#define DIGI_CMD_READ_INPUT_SIGNALS 8
70#define DIGI_CMD_IFLUSH_FIFO 9
71#define DIGI_CMD_RECEIVE_ENABLE 10
72#define DIGI_CMD_BREAK_CONTROL 11
73#define DIGI_CMD_LOCAL_LOOPBACK 12
74#define DIGI_CMD_TRANSMIT_IDLE 13
75#define DIGI_CMD_READ_UART_REGISTER 14
76#define DIGI_CMD_WRITE_UART_REGISTER 15
77#define DIGI_CMD_AND_UART_REGISTER 16
78#define DIGI_CMD_OR_UART_REGISTER 17
79#define DIGI_CMD_SEND_DATA 18
80#define DIGI_CMD_RECEIVE_DATA 19
81#define DIGI_CMD_RECEIVE_DISABLE 20
82#define DIGI_CMD_GET_PORT_TYPE 21
83
84
85#define DIGI_BAUD_50 0
86#define DIGI_BAUD_75 1
87#define DIGI_BAUD_110 2
88#define DIGI_BAUD_150 3
89#define DIGI_BAUD_200 4
90#define DIGI_BAUD_300 5
91#define DIGI_BAUD_600 6
92#define DIGI_BAUD_1200 7
93#define DIGI_BAUD_1800 8
94#define DIGI_BAUD_2400 9
95#define DIGI_BAUD_4800 10
96#define DIGI_BAUD_7200 11
97#define DIGI_BAUD_9600 12
98#define DIGI_BAUD_14400 13
99#define DIGI_BAUD_19200 14
100#define DIGI_BAUD_28800 15
101#define DIGI_BAUD_38400 16
102#define DIGI_BAUD_57600 17
103#define DIGI_BAUD_76800 18
104#define DIGI_BAUD_115200 19
105#define DIGI_BAUD_153600 20
106#define DIGI_BAUD_230400 21
107#define DIGI_BAUD_460800 22
108
109
110#define DIGI_WORD_SIZE_5 0
111#define DIGI_WORD_SIZE_6 1
112#define DIGI_WORD_SIZE_7 2
113#define DIGI_WORD_SIZE_8 3
114
115#define DIGI_PARITY_NONE 0
116#define DIGI_PARITY_ODD 1
117#define DIGI_PARITY_EVEN 2
118#define DIGI_PARITY_MARK 3
119#define DIGI_PARITY_SPACE 4
120
121#define DIGI_STOP_BITS_1 0
122#define DIGI_STOP_BITS_2 1
123
124#define DIGI_INPUT_FLOW_CONTROL_XON_XOFF 1
125#define DIGI_INPUT_FLOW_CONTROL_RTS 2
126#define DIGI_INPUT_FLOW_CONTROL_DTR 4
127
128#define DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF 1
129#define DIGI_OUTPUT_FLOW_CONTROL_CTS 2
130#define DIGI_OUTPUT_FLOW_CONTROL_DSR 4
131
132#define DIGI_DTR_INACTIVE 0
133#define DIGI_DTR_ACTIVE 1
134#define DIGI_DTR_INPUT_FLOW_CONTROL 2
135
136#define DIGI_RTS_INACTIVE 0
137#define DIGI_RTS_ACTIVE 1
138#define DIGI_RTS_INPUT_FLOW_CONTROL 2
139#define DIGI_RTS_TOGGLE 3
140
141#define DIGI_FLUSH_TX 1
142#define DIGI_FLUSH_RX 2
143#define DIGI_RESUME_TX 4
144
145#define DIGI_TRANSMIT_NOT_IDLE 0
146#define DIGI_TRANSMIT_IDLE 1
147
148#define DIGI_DISABLE 0
149#define DIGI_ENABLE 1
150
151#define DIGI_DEASSERT 0
152#define DIGI_ASSERT 1
153
154
155#define DIGI_OVERRUN_ERROR 4
156#define DIGI_PARITY_ERROR 8
157#define DIGI_FRAMING_ERROR 16
158#define DIGI_BREAK_ERROR 32
159
160
161#define DIGI_NO_ERROR 0
162#define DIGI_BAD_FIRST_PARAMETER 1
163#define DIGI_BAD_SECOND_PARAMETER 2
164#define DIGI_INVALID_LINE 3
165#define DIGI_INVALID_OPCODE 4
166
167
168#define DIGI_READ_INPUT_SIGNALS_SLOT 1
169#define DIGI_READ_INPUT_SIGNALS_ERR 2
170#define DIGI_READ_INPUT_SIGNALS_BUSY 4
171#define DIGI_READ_INPUT_SIGNALS_PE 8
172#define DIGI_READ_INPUT_SIGNALS_CTS 16
173#define DIGI_READ_INPUT_SIGNALS_DSR 32
174#define DIGI_READ_INPUT_SIGNALS_RI 64
175#define DIGI_READ_INPUT_SIGNALS_DCD 128
176
177
178
179
180struct digi_serial {
181 spinlock_t ds_serial_lock;
182 struct usb_serial_port *ds_oob_port;
183 int ds_oob_port_num;
184 int ds_device_started;
185};
186
187struct digi_port {
188 spinlock_t dp_port_lock;
189 int dp_port_num;
190 int dp_out_buf_len;
191 unsigned char dp_out_buf[DIGI_OUT_BUF_SIZE];
192 int dp_write_urb_in_use;
193 unsigned int dp_modem_signals;
194 int dp_transmit_idle;
195 wait_queue_head_t dp_transmit_idle_wait;
196 int dp_throttled;
197 int dp_throttle_restart;
198 wait_queue_head_t dp_flush_wait;
199 wait_queue_head_t dp_close_wait;
200 wait_queue_head_t write_wait;
201 struct usb_serial_port *dp_port;
202};
203
204
205
206
207static int digi_write_oob_command(struct usb_serial_port *port,
208 unsigned char *buf, int count, int interruptible);
209static int digi_write_inb_command(struct usb_serial_port *port,
210 unsigned char *buf, int count, unsigned long timeout);
211static int digi_set_modem_signals(struct usb_serial_port *port,
212 unsigned int modem_signals, int interruptible);
213static int digi_transmit_idle(struct usb_serial_port *port,
214 unsigned long timeout);
215static void digi_rx_throttle(struct tty_struct *tty);
216static void digi_rx_unthrottle(struct tty_struct *tty);
217static void digi_set_termios(struct tty_struct *tty,
218 struct usb_serial_port *port, struct ktermios *old_termios);
219static void digi_break_ctl(struct tty_struct *tty, int break_state);
220static int digi_tiocmget(struct tty_struct *tty);
221static int digi_tiocmset(struct tty_struct *tty, unsigned int set,
222 unsigned int clear);
223static int digi_write(struct tty_struct *tty, struct usb_serial_port *port,
224 const unsigned char *buf, int count);
225static void digi_write_bulk_callback(struct urb *urb);
226static unsigned int digi_write_room(struct tty_struct *tty);
227static unsigned int digi_chars_in_buffer(struct tty_struct *tty);
228static int digi_open(struct tty_struct *tty, struct usb_serial_port *port);
229static void digi_close(struct usb_serial_port *port);
230static void digi_dtr_rts(struct usb_serial_port *port, int on);
231static int digi_startup_device(struct usb_serial *serial);
232static int digi_startup(struct usb_serial *serial);
233static void digi_disconnect(struct usb_serial *serial);
234static void digi_release(struct usb_serial *serial);
235static int digi_port_probe(struct usb_serial_port *port);
236static void digi_port_remove(struct usb_serial_port *port);
237static void digi_read_bulk_callback(struct urb *urb);
238static int digi_read_inb_callback(struct urb *urb);
239static int digi_read_oob_callback(struct urb *urb);
240
241
242static const struct usb_device_id id_table_combined[] = {
243 { USB_DEVICE(DIGI_VENDOR_ID, DIGI_2_ID) },
244 { USB_DEVICE(DIGI_VENDOR_ID, DIGI_4_ID) },
245 { }
246};
247
248static const struct usb_device_id id_table_2[] = {
249 { USB_DEVICE(DIGI_VENDOR_ID, DIGI_2_ID) },
250 { }
251};
252
253static const struct usb_device_id id_table_4[] = {
254 { USB_DEVICE(DIGI_VENDOR_ID, DIGI_4_ID) },
255 { }
256};
257
258MODULE_DEVICE_TABLE(usb, id_table_combined);
259
260
261
262static struct usb_serial_driver digi_acceleport_2_device = {
263 .driver = {
264 .owner = THIS_MODULE,
265 .name = "digi_2",
266 },
267 .description = "Digi 2 port USB adapter",
268 .id_table = id_table_2,
269 .num_ports = 3,
270 .num_bulk_in = 4,
271 .num_bulk_out = 4,
272 .open = digi_open,
273 .close = digi_close,
274 .dtr_rts = digi_dtr_rts,
275 .write = digi_write,
276 .write_room = digi_write_room,
277 .write_bulk_callback = digi_write_bulk_callback,
278 .read_bulk_callback = digi_read_bulk_callback,
279 .chars_in_buffer = digi_chars_in_buffer,
280 .throttle = digi_rx_throttle,
281 .unthrottle = digi_rx_unthrottle,
282 .set_termios = digi_set_termios,
283 .break_ctl = digi_break_ctl,
284 .tiocmget = digi_tiocmget,
285 .tiocmset = digi_tiocmset,
286 .attach = digi_startup,
287 .disconnect = digi_disconnect,
288 .release = digi_release,
289 .port_probe = digi_port_probe,
290 .port_remove = digi_port_remove,
291};
292
293static struct usb_serial_driver digi_acceleport_4_device = {
294 .driver = {
295 .owner = THIS_MODULE,
296 .name = "digi_4",
297 },
298 .description = "Digi 4 port USB adapter",
299 .id_table = id_table_4,
300 .num_ports = 4,
301 .num_bulk_in = 5,
302 .num_bulk_out = 5,
303 .open = digi_open,
304 .close = digi_close,
305 .write = digi_write,
306 .write_room = digi_write_room,
307 .write_bulk_callback = digi_write_bulk_callback,
308 .read_bulk_callback = digi_read_bulk_callback,
309 .chars_in_buffer = digi_chars_in_buffer,
310 .throttle = digi_rx_throttle,
311 .unthrottle = digi_rx_unthrottle,
312 .set_termios = digi_set_termios,
313 .break_ctl = digi_break_ctl,
314 .tiocmget = digi_tiocmget,
315 .tiocmset = digi_tiocmset,
316 .attach = digi_startup,
317 .disconnect = digi_disconnect,
318 .release = digi_release,
319 .port_probe = digi_port_probe,
320 .port_remove = digi_port_remove,
321};
322
323static struct usb_serial_driver * const serial_drivers[] = {
324 &digi_acceleport_2_device, &digi_acceleport_4_device, NULL
325};
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341
342static long cond_wait_interruptible_timeout_irqrestore(
343 wait_queue_head_t *q, long timeout,
344 spinlock_t *lock, unsigned long flags)
345__releases(lock)
346{
347 DEFINE_WAIT(wait);
348
349 prepare_to_wait(q, &wait, TASK_INTERRUPTIBLE);
350 spin_unlock_irqrestore(lock, flags);
351 timeout = schedule_timeout(timeout);
352 finish_wait(q, &wait);
353
354 return timeout;
355}
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367
368static int digi_write_oob_command(struct usb_serial_port *port,
369 unsigned char *buf, int count, int interruptible)
370{
371 int ret = 0;
372 int len;
373 struct usb_serial_port *oob_port = (struct usb_serial_port *)((struct digi_serial *)(usb_get_serial_data(port->serial)))->ds_oob_port;
374 struct digi_port *oob_priv = usb_get_serial_port_data(oob_port);
375 unsigned long flags;
376
377 dev_dbg(&port->dev,
378 "digi_write_oob_command: TOP: port=%d, count=%d\n",
379 oob_priv->dp_port_num, count);
380
381 spin_lock_irqsave(&oob_priv->dp_port_lock, flags);
382 while (count > 0) {
383 while (oob_priv->dp_write_urb_in_use) {
384 cond_wait_interruptible_timeout_irqrestore(
385 &oob_priv->write_wait, DIGI_RETRY_TIMEOUT,
386 &oob_priv->dp_port_lock, flags);
387 if (interruptible && signal_pending(current))
388 return -EINTR;
389 spin_lock_irqsave(&oob_priv->dp_port_lock, flags);
390 }
391
392
393 len = min(count, oob_port->bulk_out_size);
394 if (len > 4)
395 len &= ~3;
396 memcpy(oob_port->write_urb->transfer_buffer, buf, len);
397 oob_port->write_urb->transfer_buffer_length = len;
398 ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC);
399 if (ret == 0) {
400 oob_priv->dp_write_urb_in_use = 1;
401 count -= len;
402 buf += len;
403 }
404 }
405 spin_unlock_irqrestore(&oob_priv->dp_port_lock, flags);
406 if (ret)
407 dev_err(&port->dev, "%s: usb_submit_urb failed, ret=%d\n",
408 __func__, ret);
409 return ret;
410
411}
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425
426static int digi_write_inb_command(struct usb_serial_port *port,
427 unsigned char *buf, int count, unsigned long timeout)
428{
429 int ret = 0;
430 int len;
431 struct digi_port *priv = usb_get_serial_port_data(port);
432 unsigned char *data = port->write_urb->transfer_buffer;
433 unsigned long flags;
434
435 dev_dbg(&port->dev, "digi_write_inb_command: TOP: port=%d, count=%d\n",
436 priv->dp_port_num, count);
437
438 if (timeout)
439 timeout += jiffies;
440 else
441 timeout = ULONG_MAX;
442
443 spin_lock_irqsave(&priv->dp_port_lock, flags);
444 while (count > 0 && ret == 0) {
445 while (priv->dp_write_urb_in_use &&
446 time_before(jiffies, timeout)) {
447 cond_wait_interruptible_timeout_irqrestore(
448 &priv->write_wait, DIGI_RETRY_TIMEOUT,
449 &priv->dp_port_lock, flags);
450 if (signal_pending(current))
451 return -EINTR;
452 spin_lock_irqsave(&priv->dp_port_lock, flags);
453 }
454
455
456
457
458 len = min(count, port->bulk_out_size-2-priv->dp_out_buf_len);
459 if (len > 4)
460 len &= ~3;
461
462
463 if (priv->dp_out_buf_len > 0) {
464 data[0] = DIGI_CMD_SEND_DATA;
465 data[1] = priv->dp_out_buf_len;
466 memcpy(data + 2, priv->dp_out_buf,
467 priv->dp_out_buf_len);
468 memcpy(data + 2 + priv->dp_out_buf_len, buf, len);
469 port->write_urb->transfer_buffer_length
470 = priv->dp_out_buf_len + 2 + len;
471 } else {
472 memcpy(data, buf, len);
473 port->write_urb->transfer_buffer_length = len;
474 }
475
476 ret = usb_submit_urb(port->write_urb, GFP_ATOMIC);
477 if (ret == 0) {
478 priv->dp_write_urb_in_use = 1;
479 priv->dp_out_buf_len = 0;
480 count -= len;
481 buf += len;
482 }
483
484 }
485 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
486
487 if (ret)
488 dev_err(&port->dev,
489 "%s: usb_submit_urb failed, ret=%d, port=%d\n",
490 __func__, ret, priv->dp_port_num);
491 return ret;
492}
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504
505static int digi_set_modem_signals(struct usb_serial_port *port,
506 unsigned int modem_signals, int interruptible)
507{
508
509 int ret;
510 struct digi_port *port_priv = usb_get_serial_port_data(port);
511 struct usb_serial_port *oob_port = (struct usb_serial_port *) ((struct digi_serial *)(usb_get_serial_data(port->serial)))->ds_oob_port;
512 struct digi_port *oob_priv = usb_get_serial_port_data(oob_port);
513 unsigned char *data = oob_port->write_urb->transfer_buffer;
514 unsigned long flags;
515
516 dev_dbg(&port->dev,
517 "digi_set_modem_signals: TOP: port=%d, modem_signals=0x%x\n",
518 port_priv->dp_port_num, modem_signals);
519
520 spin_lock_irqsave(&oob_priv->dp_port_lock, flags);
521 spin_lock(&port_priv->dp_port_lock);
522
523 while (oob_priv->dp_write_urb_in_use) {
524 spin_unlock(&port_priv->dp_port_lock);
525 cond_wait_interruptible_timeout_irqrestore(
526 &oob_priv->write_wait, DIGI_RETRY_TIMEOUT,
527 &oob_priv->dp_port_lock, flags);
528 if (interruptible && signal_pending(current))
529 return -EINTR;
530 spin_lock_irqsave(&oob_priv->dp_port_lock, flags);
531 spin_lock(&port_priv->dp_port_lock);
532 }
533 data[0] = DIGI_CMD_SET_DTR_SIGNAL;
534 data[1] = port_priv->dp_port_num;
535 data[2] = (modem_signals & TIOCM_DTR) ?
536 DIGI_DTR_ACTIVE : DIGI_DTR_INACTIVE;
537 data[3] = 0;
538 data[4] = DIGI_CMD_SET_RTS_SIGNAL;
539 data[5] = port_priv->dp_port_num;
540 data[6] = (modem_signals & TIOCM_RTS) ?
541 DIGI_RTS_ACTIVE : DIGI_RTS_INACTIVE;
542 data[7] = 0;
543
544 oob_port->write_urb->transfer_buffer_length = 8;
545
546 ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC);
547 if (ret == 0) {
548 oob_priv->dp_write_urb_in_use = 1;
549 port_priv->dp_modem_signals &= ~(TIOCM_DTR | TIOCM_RTS);
550 port_priv->dp_modem_signals |=
551 modem_signals & (TIOCM_DTR | TIOCM_RTS);
552 }
553 spin_unlock(&port_priv->dp_port_lock);
554 spin_unlock_irqrestore(&oob_priv->dp_port_lock, flags);
555 if (ret)
556 dev_err(&port->dev, "%s: usb_submit_urb failed, ret=%d\n",
557 __func__, ret);
558 return ret;
559}
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572
573static int digi_transmit_idle(struct usb_serial_port *port,
574 unsigned long timeout)
575{
576 int ret;
577 unsigned char buf[2];
578 struct digi_port *priv = usb_get_serial_port_data(port);
579 unsigned long flags;
580
581 spin_lock_irqsave(&priv->dp_port_lock, flags);
582 priv->dp_transmit_idle = 0;
583 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
584
585 buf[0] = DIGI_CMD_TRANSMIT_IDLE;
586 buf[1] = 0;
587
588 timeout += jiffies;
589
590 ret = digi_write_inb_command(port, buf, 2, timeout - jiffies);
591 if (ret != 0)
592 return ret;
593
594 spin_lock_irqsave(&priv->dp_port_lock, flags);
595
596 while (time_before(jiffies, timeout) && !priv->dp_transmit_idle) {
597 cond_wait_interruptible_timeout_irqrestore(
598 &priv->dp_transmit_idle_wait, DIGI_RETRY_TIMEOUT,
599 &priv->dp_port_lock, flags);
600 if (signal_pending(current))
601 return -EINTR;
602 spin_lock_irqsave(&priv->dp_port_lock, flags);
603 }
604 priv->dp_transmit_idle = 0;
605 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
606 return 0;
607
608}
609
610
611static void digi_rx_throttle(struct tty_struct *tty)
612{
613 unsigned long flags;
614 struct usb_serial_port *port = tty->driver_data;
615 struct digi_port *priv = usb_get_serial_port_data(port);
616
617
618 spin_lock_irqsave(&priv->dp_port_lock, flags);
619 priv->dp_throttled = 1;
620 priv->dp_throttle_restart = 0;
621 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
622}
623
624
625static void digi_rx_unthrottle(struct tty_struct *tty)
626{
627 int ret = 0;
628 unsigned long flags;
629 struct usb_serial_port *port = tty->driver_data;
630 struct digi_port *priv = usb_get_serial_port_data(port);
631
632 spin_lock_irqsave(&priv->dp_port_lock, flags);
633
634
635 if (priv->dp_throttle_restart)
636 ret = usb_submit_urb(port->read_urb, GFP_ATOMIC);
637
638
639 priv->dp_throttled = 0;
640 priv->dp_throttle_restart = 0;
641
642 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
643
644 if (ret)
645 dev_err(&port->dev,
646 "%s: usb_submit_urb failed, ret=%d, port=%d\n",
647 __func__, ret, priv->dp_port_num);
648}
649
650
651static void digi_set_termios(struct tty_struct *tty,
652 struct usb_serial_port *port, struct ktermios *old_termios)
653{
654 struct digi_port *priv = usb_get_serial_port_data(port);
655 struct device *dev = &port->dev;
656 unsigned int iflag = tty->termios.c_iflag;
657 unsigned int cflag = tty->termios.c_cflag;
658 unsigned int old_iflag = old_termios->c_iflag;
659 unsigned int old_cflag = old_termios->c_cflag;
660 unsigned char buf[32];
661 unsigned int modem_signals;
662 int arg, ret;
663 int i = 0;
664 speed_t baud;
665
666 dev_dbg(dev,
667 "digi_set_termios: TOP: port=%d, iflag=0x%x, old_iflag=0x%x, cflag=0x%x, old_cflag=0x%x\n",
668 priv->dp_port_num, iflag, old_iflag, cflag, old_cflag);
669
670
671 baud = tty_get_baud_rate(tty);
672 if (baud != tty_termios_baud_rate(old_termios)) {
673 arg = -1;
674
675
676 if ((old_cflag & CBAUD) == B0) {
677
678
679 modem_signals = TIOCM_DTR;
680 if (!C_CRTSCTS(tty) || !tty_throttled(tty))
681 modem_signals |= TIOCM_RTS;
682 digi_set_modem_signals(port, modem_signals, 1);
683 }
684 switch (baud) {
685
686 case 0: digi_set_modem_signals(port, 0, 1); break;
687 case 50: arg = DIGI_BAUD_50; break;
688 case 75: arg = DIGI_BAUD_75; break;
689 case 110: arg = DIGI_BAUD_110; break;
690 case 150: arg = DIGI_BAUD_150; break;
691 case 200: arg = DIGI_BAUD_200; break;
692 case 300: arg = DIGI_BAUD_300; break;
693 case 600: arg = DIGI_BAUD_600; break;
694 case 1200: arg = DIGI_BAUD_1200; break;
695 case 1800: arg = DIGI_BAUD_1800; break;
696 case 2400: arg = DIGI_BAUD_2400; break;
697 case 4800: arg = DIGI_BAUD_4800; break;
698 case 9600: arg = DIGI_BAUD_9600; break;
699 case 19200: arg = DIGI_BAUD_19200; break;
700 case 38400: arg = DIGI_BAUD_38400; break;
701 case 57600: arg = DIGI_BAUD_57600; break;
702 case 115200: arg = DIGI_BAUD_115200; break;
703 case 230400: arg = DIGI_BAUD_230400; break;
704 case 460800: arg = DIGI_BAUD_460800; break;
705 default:
706 arg = DIGI_BAUD_9600;
707 baud = 9600;
708 break;
709 }
710 if (arg != -1) {
711 buf[i++] = DIGI_CMD_SET_BAUD_RATE;
712 buf[i++] = priv->dp_port_num;
713 buf[i++] = arg;
714 buf[i++] = 0;
715 }
716 }
717
718 tty->termios.c_cflag &= ~CMSPAR;
719
720 if ((cflag & (PARENB | PARODD)) != (old_cflag & (PARENB | PARODD))) {
721 if (cflag & PARENB) {
722 if (cflag & PARODD)
723 arg = DIGI_PARITY_ODD;
724 else
725 arg = DIGI_PARITY_EVEN;
726 } else {
727 arg = DIGI_PARITY_NONE;
728 }
729 buf[i++] = DIGI_CMD_SET_PARITY;
730 buf[i++] = priv->dp_port_num;
731 buf[i++] = arg;
732 buf[i++] = 0;
733 }
734
735 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
736 arg = -1;
737 switch (cflag & CSIZE) {
738 case CS5: arg = DIGI_WORD_SIZE_5; break;
739 case CS6: arg = DIGI_WORD_SIZE_6; break;
740 case CS7: arg = DIGI_WORD_SIZE_7; break;
741 case CS8: arg = DIGI_WORD_SIZE_8; break;
742 default:
743 dev_dbg(dev,
744 "digi_set_termios: can't handle word size %d\n",
745 cflag & CSIZE);
746 break;
747 }
748
749 if (arg != -1) {
750 buf[i++] = DIGI_CMD_SET_WORD_SIZE;
751 buf[i++] = priv->dp_port_num;
752 buf[i++] = arg;
753 buf[i++] = 0;
754 }
755
756 }
757
758
759 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
760
761 if ((cflag & CSTOPB))
762 arg = DIGI_STOP_BITS_2;
763 else
764 arg = DIGI_STOP_BITS_1;
765
766 buf[i++] = DIGI_CMD_SET_STOP_BITS;
767 buf[i++] = priv->dp_port_num;
768 buf[i++] = arg;
769 buf[i++] = 0;
770
771 }
772
773
774 if ((iflag & IXOFF) != (old_iflag & IXOFF) ||
775 (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
776 arg = 0;
777 if (iflag & IXOFF)
778 arg |= DIGI_INPUT_FLOW_CONTROL_XON_XOFF;
779 else
780 arg &= ~DIGI_INPUT_FLOW_CONTROL_XON_XOFF;
781
782 if (cflag & CRTSCTS) {
783 arg |= DIGI_INPUT_FLOW_CONTROL_RTS;
784
785
786
787 buf[i++] = DIGI_CMD_SET_RTS_SIGNAL;
788 buf[i++] = priv->dp_port_num;
789 buf[i++] = DIGI_RTS_ACTIVE;
790 buf[i++] = 0;
791
792 } else {
793 arg &= ~DIGI_INPUT_FLOW_CONTROL_RTS;
794 }
795 buf[i++] = DIGI_CMD_SET_INPUT_FLOW_CONTROL;
796 buf[i++] = priv->dp_port_num;
797 buf[i++] = arg;
798 buf[i++] = 0;
799 }
800
801
802 if ((iflag & IXON) != (old_iflag & IXON) ||
803 (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
804 arg = 0;
805 if (iflag & IXON)
806 arg |= DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF;
807 else
808 arg &= ~DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF;
809
810 if (cflag & CRTSCTS)
811 arg |= DIGI_OUTPUT_FLOW_CONTROL_CTS;
812 else
813 arg &= ~DIGI_OUTPUT_FLOW_CONTROL_CTS;
814
815 buf[i++] = DIGI_CMD_SET_OUTPUT_FLOW_CONTROL;
816 buf[i++] = priv->dp_port_num;
817 buf[i++] = arg;
818 buf[i++] = 0;
819 }
820
821
822 if ((cflag & CREAD) != (old_cflag & CREAD)) {
823 if (cflag & CREAD)
824 arg = DIGI_ENABLE;
825 else
826 arg = DIGI_DISABLE;
827
828 buf[i++] = DIGI_CMD_RECEIVE_ENABLE;
829 buf[i++] = priv->dp_port_num;
830 buf[i++] = arg;
831 buf[i++] = 0;
832 }
833 ret = digi_write_oob_command(port, buf, i, 1);
834 if (ret != 0)
835 dev_dbg(dev, "digi_set_termios: write oob failed, ret=%d\n", ret);
836 tty_encode_baud_rate(tty, baud, baud);
837}
838
839
840static void digi_break_ctl(struct tty_struct *tty, int break_state)
841{
842 struct usb_serial_port *port = tty->driver_data;
843 unsigned char buf[4];
844
845 buf[0] = DIGI_CMD_BREAK_CONTROL;
846 buf[1] = 2;
847 buf[2] = break_state ? 1 : 0;
848 buf[3] = 0;
849 digi_write_inb_command(port, buf, 4, 0);
850}
851
852
853static int digi_tiocmget(struct tty_struct *tty)
854{
855 struct usb_serial_port *port = tty->driver_data;
856 struct digi_port *priv = usb_get_serial_port_data(port);
857 unsigned int val;
858 unsigned long flags;
859
860 spin_lock_irqsave(&priv->dp_port_lock, flags);
861 val = priv->dp_modem_signals;
862 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
863 return val;
864}
865
866
867static int digi_tiocmset(struct tty_struct *tty,
868 unsigned int set, unsigned int clear)
869{
870 struct usb_serial_port *port = tty->driver_data;
871 struct digi_port *priv = usb_get_serial_port_data(port);
872 unsigned int val;
873 unsigned long flags;
874
875 spin_lock_irqsave(&priv->dp_port_lock, flags);
876 val = (priv->dp_modem_signals & ~clear) | set;
877 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
878 return digi_set_modem_signals(port, val, 1);
879}
880
881
882static int digi_write(struct tty_struct *tty, struct usb_serial_port *port,
883 const unsigned char *buf, int count)
884{
885
886 int ret, data_len, new_len;
887 struct digi_port *priv = usb_get_serial_port_data(port);
888 unsigned char *data = port->write_urb->transfer_buffer;
889 unsigned long flags;
890
891 dev_dbg(&port->dev, "digi_write: TOP: port=%d, count=%d\n",
892 priv->dp_port_num, count);
893
894
895 count = min(count, port->bulk_out_size-2);
896 count = min(64, count);
897
898
899
900 spin_lock_irqsave(&priv->dp_port_lock, flags);
901
902
903 if (priv->dp_write_urb_in_use) {
904
905 if (count == 1 && priv->dp_out_buf_len < DIGI_OUT_BUF_SIZE) {
906 priv->dp_out_buf[priv->dp_out_buf_len++] = *buf;
907 new_len = 1;
908 } else {
909 new_len = 0;
910 }
911 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
912 return new_len;
913 }
914
915
916
917 new_len = min(count, port->bulk_out_size-2-priv->dp_out_buf_len);
918 data_len = new_len + priv->dp_out_buf_len;
919
920 if (data_len == 0) {
921 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
922 return 0;
923 }
924
925 port->write_urb->transfer_buffer_length = data_len+2;
926
927 *data++ = DIGI_CMD_SEND_DATA;
928 *data++ = data_len;
929
930
931 memcpy(data, priv->dp_out_buf, priv->dp_out_buf_len);
932 data += priv->dp_out_buf_len;
933
934
935 memcpy(data, buf, new_len);
936
937 ret = usb_submit_urb(port->write_urb, GFP_ATOMIC);
938 if (ret == 0) {
939 priv->dp_write_urb_in_use = 1;
940 ret = new_len;
941 priv->dp_out_buf_len = 0;
942 }
943
944
945 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
946 if (ret < 0)
947 dev_err_console(port,
948 "%s: usb_submit_urb failed, ret=%d, port=%d\n",
949 __func__, ret, priv->dp_port_num);
950 dev_dbg(&port->dev, "digi_write: returning %d\n", ret);
951 return ret;
952
953}
954
955static void digi_write_bulk_callback(struct urb *urb)
956{
957
958 struct usb_serial_port *port = urb->context;
959 struct usb_serial *serial;
960 struct digi_port *priv;
961 struct digi_serial *serial_priv;
962 unsigned long flags;
963 int ret = 0;
964 int status = urb->status;
965 bool wakeup;
966
967
968 if (port == NULL || (priv = usb_get_serial_port_data(port)) == NULL) {
969 pr_err("%s: port or port->private is NULL, status=%d\n",
970 __func__, status);
971 return;
972 }
973 serial = port->serial;
974 if (serial == NULL || (serial_priv = usb_get_serial_data(serial)) == NULL) {
975 dev_err(&port->dev,
976 "%s: serial or serial->private is NULL, status=%d\n",
977 __func__, status);
978 return;
979 }
980
981
982 if (priv->dp_port_num == serial_priv->ds_oob_port_num) {
983 dev_dbg(&port->dev, "digi_write_bulk_callback: oob callback\n");
984 spin_lock_irqsave(&priv->dp_port_lock, flags);
985 priv->dp_write_urb_in_use = 0;
986 wake_up_interruptible(&priv->write_wait);
987 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
988 return;
989 }
990
991
992 wakeup = true;
993 spin_lock_irqsave(&priv->dp_port_lock, flags);
994 priv->dp_write_urb_in_use = 0;
995 if (priv->dp_out_buf_len > 0) {
996 *((unsigned char *)(port->write_urb->transfer_buffer))
997 = (unsigned char)DIGI_CMD_SEND_DATA;
998 *((unsigned char *)(port->write_urb->transfer_buffer) + 1)
999 = (unsigned char)priv->dp_out_buf_len;
1000 port->write_urb->transfer_buffer_length =
1001 priv->dp_out_buf_len + 2;
1002 memcpy(port->write_urb->transfer_buffer + 2, priv->dp_out_buf,
1003 priv->dp_out_buf_len);
1004 ret = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1005 if (ret == 0) {
1006 priv->dp_write_urb_in_use = 1;
1007 priv->dp_out_buf_len = 0;
1008 wakeup = false;
1009 }
1010 }
1011 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
1012
1013 if (ret && ret != -EPERM)
1014 dev_err_console(port,
1015 "%s: usb_submit_urb failed, ret=%d, port=%d\n",
1016 __func__, ret, priv->dp_port_num);
1017
1018 if (wakeup)
1019 tty_port_tty_wakeup(&port->port);
1020}
1021
1022static unsigned int digi_write_room(struct tty_struct *tty)
1023{
1024 struct usb_serial_port *port = tty->driver_data;
1025 struct digi_port *priv = usb_get_serial_port_data(port);
1026 unsigned long flags;
1027 unsigned int room;
1028
1029 spin_lock_irqsave(&priv->dp_port_lock, flags);
1030
1031 if (priv->dp_write_urb_in_use)
1032 room = 0;
1033 else
1034 room = port->bulk_out_size - 2 - priv->dp_out_buf_len;
1035
1036 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
1037 dev_dbg(&port->dev, "digi_write_room: port=%d, room=%u\n", priv->dp_port_num, room);
1038 return room;
1039
1040}
1041
1042static unsigned int digi_chars_in_buffer(struct tty_struct *tty)
1043{
1044 struct usb_serial_port *port = tty->driver_data;
1045 struct digi_port *priv = usb_get_serial_port_data(port);
1046 unsigned long flags;
1047 unsigned int chars;
1048
1049 spin_lock_irqsave(&priv->dp_port_lock, flags);
1050 if (priv->dp_write_urb_in_use)
1051 chars = port->bulk_out_size - 2;
1052 else
1053 chars = priv->dp_out_buf_len;
1054 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
1055
1056 dev_dbg(&port->dev, "%s: port=%d, chars=%d\n", __func__,
1057 priv->dp_port_num, chars);
1058 return chars;
1059}
1060
1061static void digi_dtr_rts(struct usb_serial_port *port, int on)
1062{
1063
1064 digi_set_modem_signals(port, on * (TIOCM_DTR | TIOCM_RTS), 1);
1065}
1066
1067static int digi_open(struct tty_struct *tty, struct usb_serial_port *port)
1068{
1069 int ret;
1070 unsigned char buf[32];
1071 struct digi_port *priv = usb_get_serial_port_data(port);
1072 struct ktermios not_termios;
1073
1074
1075 if (digi_startup_device(port->serial) != 0)
1076 return -ENXIO;
1077
1078
1079 buf[0] = DIGI_CMD_READ_INPUT_SIGNALS;
1080 buf[1] = priv->dp_port_num;
1081 buf[2] = DIGI_ENABLE;
1082 buf[3] = 0;
1083
1084
1085 buf[4] = DIGI_CMD_IFLUSH_FIFO;
1086 buf[5] = priv->dp_port_num;
1087 buf[6] = DIGI_FLUSH_TX | DIGI_FLUSH_RX;
1088 buf[7] = 0;
1089
1090 ret = digi_write_oob_command(port, buf, 8, 1);
1091 if (ret != 0)
1092 dev_dbg(&port->dev, "digi_open: write oob failed, ret=%d\n", ret);
1093
1094
1095 if (tty) {
1096 not_termios.c_cflag = ~tty->termios.c_cflag;
1097 not_termios.c_iflag = ~tty->termios.c_iflag;
1098 digi_set_termios(tty, port, ¬_termios);
1099 }
1100 return 0;
1101}
1102
1103
1104static void digi_close(struct usb_serial_port *port)
1105{
1106 DEFINE_WAIT(wait);
1107 int ret;
1108 unsigned char buf[32];
1109 struct digi_port *priv = usb_get_serial_port_data(port);
1110
1111 mutex_lock(&port->serial->disc_mutex);
1112
1113 if (port->serial->disconnected)
1114 goto exit;
1115
1116
1117 digi_transmit_idle(port, DIGI_CLOSE_TIMEOUT);
1118
1119
1120 buf[0] = DIGI_CMD_SET_INPUT_FLOW_CONTROL;
1121 buf[1] = priv->dp_port_num;
1122 buf[2] = DIGI_DISABLE;
1123 buf[3] = 0;
1124
1125
1126 buf[4] = DIGI_CMD_SET_OUTPUT_FLOW_CONTROL;
1127 buf[5] = priv->dp_port_num;
1128 buf[6] = DIGI_DISABLE;
1129 buf[7] = 0;
1130
1131
1132 buf[8] = DIGI_CMD_READ_INPUT_SIGNALS;
1133 buf[9] = priv->dp_port_num;
1134 buf[10] = DIGI_DISABLE;
1135 buf[11] = 0;
1136
1137
1138 buf[12] = DIGI_CMD_RECEIVE_ENABLE;
1139 buf[13] = priv->dp_port_num;
1140 buf[14] = DIGI_DISABLE;
1141 buf[15] = 0;
1142
1143
1144 buf[16] = DIGI_CMD_IFLUSH_FIFO;
1145 buf[17] = priv->dp_port_num;
1146 buf[18] = DIGI_FLUSH_TX | DIGI_FLUSH_RX;
1147 buf[19] = 0;
1148
1149 ret = digi_write_oob_command(port, buf, 20, 0);
1150 if (ret != 0)
1151 dev_dbg(&port->dev, "digi_close: write oob failed, ret=%d\n",
1152 ret);
1153
1154 prepare_to_wait(&priv->dp_flush_wait, &wait,
1155 TASK_INTERRUPTIBLE);
1156 schedule_timeout(DIGI_CLOSE_TIMEOUT);
1157 finish_wait(&priv->dp_flush_wait, &wait);
1158
1159
1160 usb_kill_urb(port->write_urb);
1161exit:
1162 spin_lock_irq(&priv->dp_port_lock);
1163 priv->dp_write_urb_in_use = 0;
1164 wake_up_interruptible(&priv->dp_close_wait);
1165 spin_unlock_irq(&priv->dp_port_lock);
1166 mutex_unlock(&port->serial->disc_mutex);
1167}
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177static int digi_startup_device(struct usb_serial *serial)
1178{
1179 int i, ret = 0;
1180 struct digi_serial *serial_priv = usb_get_serial_data(serial);
1181 struct usb_serial_port *port;
1182
1183
1184 spin_lock(&serial_priv->ds_serial_lock);
1185 if (serial_priv->ds_device_started) {
1186 spin_unlock(&serial_priv->ds_serial_lock);
1187 return 0;
1188 }
1189 serial_priv->ds_device_started = 1;
1190 spin_unlock(&serial_priv->ds_serial_lock);
1191
1192
1193
1194 for (i = 0; i < serial->type->num_ports + 1; i++) {
1195 port = serial->port[i];
1196 ret = usb_submit_urb(port->read_urb, GFP_KERNEL);
1197 if (ret != 0) {
1198 dev_err(&port->dev,
1199 "%s: usb_submit_urb failed, ret=%d, port=%d\n",
1200 __func__, ret, i);
1201 break;
1202 }
1203 }
1204 return ret;
1205}
1206
1207static int digi_port_init(struct usb_serial_port *port, unsigned port_num)
1208{
1209 struct digi_port *priv;
1210
1211 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1212 if (!priv)
1213 return -ENOMEM;
1214
1215 spin_lock_init(&priv->dp_port_lock);
1216 priv->dp_port_num = port_num;
1217 init_waitqueue_head(&priv->dp_transmit_idle_wait);
1218 init_waitqueue_head(&priv->dp_flush_wait);
1219 init_waitqueue_head(&priv->dp_close_wait);
1220 init_waitqueue_head(&priv->write_wait);
1221 priv->dp_port = port;
1222
1223 usb_set_serial_port_data(port, priv);
1224
1225 return 0;
1226}
1227
1228static int digi_startup(struct usb_serial *serial)
1229{
1230 struct digi_serial *serial_priv;
1231 int ret;
1232
1233 serial_priv = kzalloc(sizeof(*serial_priv), GFP_KERNEL);
1234 if (!serial_priv)
1235 return -ENOMEM;
1236
1237 spin_lock_init(&serial_priv->ds_serial_lock);
1238 serial_priv->ds_oob_port_num = serial->type->num_ports;
1239 serial_priv->ds_oob_port = serial->port[serial_priv->ds_oob_port_num];
1240
1241 ret = digi_port_init(serial_priv->ds_oob_port,
1242 serial_priv->ds_oob_port_num);
1243 if (ret) {
1244 kfree(serial_priv);
1245 return ret;
1246 }
1247
1248 usb_set_serial_data(serial, serial_priv);
1249
1250 return 0;
1251}
1252
1253
1254static void digi_disconnect(struct usb_serial *serial)
1255{
1256 int i;
1257
1258
1259 for (i = 0; i < serial->type->num_ports + 1; i++) {
1260 usb_kill_urb(serial->port[i]->read_urb);
1261 usb_kill_urb(serial->port[i]->write_urb);
1262 }
1263}
1264
1265
1266static void digi_release(struct usb_serial *serial)
1267{
1268 struct digi_serial *serial_priv;
1269 struct digi_port *priv;
1270
1271 serial_priv = usb_get_serial_data(serial);
1272
1273 priv = usb_get_serial_port_data(serial_priv->ds_oob_port);
1274 kfree(priv);
1275
1276 kfree(serial_priv);
1277}
1278
1279static int digi_port_probe(struct usb_serial_port *port)
1280{
1281 return digi_port_init(port, port->port_number);
1282}
1283
1284static void digi_port_remove(struct usb_serial_port *port)
1285{
1286 struct digi_port *priv;
1287
1288 priv = usb_get_serial_port_data(port);
1289 kfree(priv);
1290}
1291
1292static void digi_read_bulk_callback(struct urb *urb)
1293{
1294 struct usb_serial_port *port = urb->context;
1295 struct digi_port *priv;
1296 struct digi_serial *serial_priv;
1297 int ret;
1298 int status = urb->status;
1299
1300
1301 if (port == NULL)
1302 return;
1303 priv = usb_get_serial_port_data(port);
1304 if (priv == NULL) {
1305 dev_err(&port->dev, "%s: port->private is NULL, status=%d\n",
1306 __func__, status);
1307 return;
1308 }
1309 if (port->serial == NULL ||
1310 (serial_priv = usb_get_serial_data(port->serial)) == NULL) {
1311 dev_err(&port->dev, "%s: serial is bad or serial->private "
1312 "is NULL, status=%d\n", __func__, status);
1313 return;
1314 }
1315
1316
1317 if (status) {
1318 dev_err(&port->dev,
1319 "%s: nonzero read bulk status: status=%d, port=%d\n",
1320 __func__, status, priv->dp_port_num);
1321 return;
1322 }
1323
1324
1325 if (priv->dp_port_num == serial_priv->ds_oob_port_num) {
1326 if (digi_read_oob_callback(urb) != 0)
1327 return;
1328 } else {
1329 if (digi_read_inb_callback(urb) != 0)
1330 return;
1331 }
1332
1333
1334 ret = usb_submit_urb(urb, GFP_ATOMIC);
1335 if (ret != 0 && ret != -EPERM) {
1336 dev_err(&port->dev,
1337 "%s: failed resubmitting urb, ret=%d, port=%d\n",
1338 __func__, ret, priv->dp_port_num);
1339 }
1340
1341}
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353static int digi_read_inb_callback(struct urb *urb)
1354{
1355 struct usb_serial_port *port = urb->context;
1356 struct digi_port *priv = usb_get_serial_port_data(port);
1357 unsigned char *buf = urb->transfer_buffer;
1358 unsigned long flags;
1359 int opcode;
1360 int len;
1361 int port_status;
1362 unsigned char *data;
1363 int tty_flag, throttled;
1364
1365
1366 if (urb->actual_length < 2) {
1367 dev_warn(&port->dev, "short packet received\n");
1368 return -1;
1369 }
1370
1371 opcode = buf[0];
1372 len = buf[1];
1373
1374 if (urb->actual_length != len + 2) {
1375 dev_err(&port->dev, "malformed packet received: port=%d, opcode=%d, len=%d, actual_length=%u\n",
1376 priv->dp_port_num, opcode, len, urb->actual_length);
1377 return -1;
1378 }
1379
1380 if (opcode == DIGI_CMD_RECEIVE_DATA && len < 1) {
1381 dev_err(&port->dev, "malformed data packet received\n");
1382 return -1;
1383 }
1384
1385 spin_lock_irqsave(&priv->dp_port_lock, flags);
1386
1387
1388
1389 throttled = priv->dp_throttled;
1390 if (throttled)
1391 priv->dp_throttle_restart = 1;
1392
1393
1394 if (opcode == DIGI_CMD_RECEIVE_DATA) {
1395 port_status = buf[2];
1396 data = &buf[3];
1397
1398
1399 tty_flag = 0;
1400
1401
1402 if (port_status & DIGI_OVERRUN_ERROR)
1403 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
1404
1405
1406
1407 if (port_status & DIGI_BREAK_ERROR)
1408 tty_flag = TTY_BREAK;
1409 else if (port_status & DIGI_PARITY_ERROR)
1410 tty_flag = TTY_PARITY;
1411 else if (port_status & DIGI_FRAMING_ERROR)
1412 tty_flag = TTY_FRAME;
1413
1414
1415 --len;
1416 if (len > 0) {
1417 tty_insert_flip_string_fixed_flag(&port->port, data,
1418 tty_flag, len);
1419 tty_flip_buffer_push(&port->port);
1420 }
1421 }
1422 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
1423
1424 if (opcode == DIGI_CMD_RECEIVE_DISABLE)
1425 dev_dbg(&port->dev, "%s: got RECEIVE_DISABLE\n", __func__);
1426 else if (opcode != DIGI_CMD_RECEIVE_DATA)
1427 dev_dbg(&port->dev, "%s: unknown opcode: %d\n", __func__, opcode);
1428
1429 return throttled ? 1 : 0;
1430
1431}
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443static int digi_read_oob_callback(struct urb *urb)
1444{
1445
1446 struct usb_serial_port *port = urb->context;
1447 struct usb_serial *serial = port->serial;
1448 struct tty_struct *tty;
1449 struct digi_port *priv;
1450 unsigned char *buf = urb->transfer_buffer;
1451 int opcode, line, status, val;
1452 unsigned long flags;
1453 int i;
1454 unsigned int rts;
1455
1456 if (urb->actual_length < 4)
1457 return -1;
1458
1459
1460 for (i = 0; i < urb->actual_length - 3; i += 4) {
1461 opcode = buf[i];
1462 line = buf[i + 1];
1463 status = buf[i + 2];
1464 val = buf[i + 3];
1465
1466 dev_dbg(&port->dev, "digi_read_oob_callback: opcode=%d, line=%d, status=%d, val=%d\n",
1467 opcode, line, status, val);
1468
1469 if (status != 0 || line >= serial->type->num_ports)
1470 continue;
1471
1472 port = serial->port[line];
1473
1474 priv = usb_get_serial_port_data(port);
1475 if (priv == NULL)
1476 return -1;
1477
1478 tty = tty_port_tty_get(&port->port);
1479
1480 rts = 0;
1481 if (tty)
1482 rts = C_CRTSCTS(tty);
1483
1484 if (tty && opcode == DIGI_CMD_READ_INPUT_SIGNALS) {
1485 bool wakeup = false;
1486
1487 spin_lock_irqsave(&priv->dp_port_lock, flags);
1488
1489 if (val & DIGI_READ_INPUT_SIGNALS_CTS) {
1490 priv->dp_modem_signals |= TIOCM_CTS;
1491 if (rts)
1492 wakeup = true;
1493 } else {
1494 priv->dp_modem_signals &= ~TIOCM_CTS;
1495
1496 }
1497 if (val & DIGI_READ_INPUT_SIGNALS_DSR)
1498 priv->dp_modem_signals |= TIOCM_DSR;
1499 else
1500 priv->dp_modem_signals &= ~TIOCM_DSR;
1501 if (val & DIGI_READ_INPUT_SIGNALS_RI)
1502 priv->dp_modem_signals |= TIOCM_RI;
1503 else
1504 priv->dp_modem_signals &= ~TIOCM_RI;
1505 if (val & DIGI_READ_INPUT_SIGNALS_DCD)
1506 priv->dp_modem_signals |= TIOCM_CD;
1507 else
1508 priv->dp_modem_signals &= ~TIOCM_CD;
1509
1510 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
1511
1512 if (wakeup)
1513 tty_port_tty_wakeup(&port->port);
1514 } else if (opcode == DIGI_CMD_TRANSMIT_IDLE) {
1515 spin_lock_irqsave(&priv->dp_port_lock, flags);
1516 priv->dp_transmit_idle = 1;
1517 wake_up_interruptible(&priv->dp_transmit_idle_wait);
1518 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
1519 } else if (opcode == DIGI_CMD_IFLUSH_FIFO) {
1520 wake_up_interruptible(&priv->dp_flush_wait);
1521 }
1522 tty_kref_put(tty);
1523 }
1524 return 0;
1525
1526}
1527
1528module_usb_serial_driver(serial_drivers, id_table_combined);
1529
1530MODULE_AUTHOR(DRIVER_AUTHOR);
1531MODULE_DESCRIPTION(DRIVER_DESC);
1532MODULE_LICENSE("GPL");
1533