2 * Digi AccelePort USB-4 and USB-2 Serial Converters
4 * Copyright 2000 by Digi International
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * Shamelessly based on Brian Warner's keyspan_pda.c and Greg Kroah-Hartman's
14 * Peter Berger (pberger@brimson.com)
15 * Al Borchers (borchers@steinerpoint.com)
18 #include <linux/kernel.h>
19 #include <linux/errno.h>
20 #include <linux/slab.h>
21 #include <linux/tty.h>
22 #include <linux/tty_driver.h>
23 #include <linux/tty_flip.h>
24 #include <linux/module.h>
25 #include <linux/spinlock.h>
26 #include <linux/uaccess.h>
27 #include <linux/usb.h>
28 #include <linux/wait.h>
29 #include <linux/usb/serial.h>
33 #define DRIVER_AUTHOR "Peter Berger <pberger@brimson.com>, Al Borchers <borchers@steinerpoint.com>"
34 #define DRIVER_DESC "Digi AccelePort USB-2/USB-4 Serial Converter driver"
36 /* port output buffer length -- must be <= transfer buffer length - 2 */
37 /* so we can be sure to send the full buffer in one urb */
38 #define DIGI_OUT_BUF_SIZE 8
40 /* port input buffer length -- must be >= transfer buffer length - 3 */
41 /* so we can be sure to hold at least one full buffer from one urb */
42 #define DIGI_IN_BUF_SIZE 64
44 /* retry timeout while sleeping */
45 #define DIGI_RETRY_TIMEOUT (HZ/10)
47 /* timeout while waiting for tty output to drain in close */
48 /* this delay is used twice in close, so the total delay could */
49 /* be twice this value */
50 #define DIGI_CLOSE_TIMEOUT (5*HZ)
53 /* AccelePort USB Defines */
56 #define DIGI_VENDOR_ID 0x05c5
57 #define DIGI_2_ID 0x0002 /* USB-2 */
58 #define DIGI_4_ID 0x0004 /* USB-4 */
61 * "INB": can be used on the in-band endpoint
62 * "OOB": can be used on the out-of-band endpoint
64 #define DIGI_CMD_SET_BAUD_RATE 0 /* INB, OOB */
65 #define DIGI_CMD_SET_WORD_SIZE 1 /* INB, OOB */
66 #define DIGI_CMD_SET_PARITY 2 /* INB, OOB */
67 #define DIGI_CMD_SET_STOP_BITS 3 /* INB, OOB */
68 #define DIGI_CMD_SET_INPUT_FLOW_CONTROL 4 /* INB, OOB */
69 #define DIGI_CMD_SET_OUTPUT_FLOW_CONTROL 5 /* INB, OOB */
70 #define DIGI_CMD_SET_DTR_SIGNAL 6 /* INB, OOB */
71 #define DIGI_CMD_SET_RTS_SIGNAL 7 /* INB, OOB */
72 #define DIGI_CMD_READ_INPUT_SIGNALS 8 /* OOB */
73 #define DIGI_CMD_IFLUSH_FIFO 9 /* OOB */
74 #define DIGI_CMD_RECEIVE_ENABLE 10 /* INB, OOB */
75 #define DIGI_CMD_BREAK_CONTROL 11 /* INB, OOB */
76 #define DIGI_CMD_LOCAL_LOOPBACK 12 /* INB, OOB */
77 #define DIGI_CMD_TRANSMIT_IDLE 13 /* INB, OOB */
78 #define DIGI_CMD_READ_UART_REGISTER 14 /* OOB */
79 #define DIGI_CMD_WRITE_UART_REGISTER 15 /* INB, OOB */
80 #define DIGI_CMD_AND_UART_REGISTER 16 /* INB, OOB */
81 #define DIGI_CMD_OR_UART_REGISTER 17 /* INB, OOB */
82 #define DIGI_CMD_SEND_DATA 18 /* INB */
83 #define DIGI_CMD_RECEIVE_DATA 19 /* INB */
84 #define DIGI_CMD_RECEIVE_DISABLE 20 /* INB */
85 #define DIGI_CMD_GET_PORT_TYPE 21 /* OOB */
88 #define DIGI_BAUD_50 0
89 #define DIGI_BAUD_75 1
90 #define DIGI_BAUD_110 2
91 #define DIGI_BAUD_150 3
92 #define DIGI_BAUD_200 4
93 #define DIGI_BAUD_300 5
94 #define DIGI_BAUD_600 6
95 #define DIGI_BAUD_1200 7
96 #define DIGI_BAUD_1800 8
97 #define DIGI_BAUD_2400 9
98 #define DIGI_BAUD_4800 10
99 #define DIGI_BAUD_7200 11
100 #define DIGI_BAUD_9600 12
101 #define DIGI_BAUD_14400 13
102 #define DIGI_BAUD_19200 14
103 #define DIGI_BAUD_28800 15
104 #define DIGI_BAUD_38400 16
105 #define DIGI_BAUD_57600 17
106 #define DIGI_BAUD_76800 18
107 #define DIGI_BAUD_115200 19
108 #define DIGI_BAUD_153600 20
109 #define DIGI_BAUD_230400 21
110 #define DIGI_BAUD_460800 22
113 #define DIGI_WORD_SIZE_5 0
114 #define DIGI_WORD_SIZE_6 1
115 #define DIGI_WORD_SIZE_7 2
116 #define DIGI_WORD_SIZE_8 3
118 #define DIGI_PARITY_NONE 0
119 #define DIGI_PARITY_ODD 1
120 #define DIGI_PARITY_EVEN 2
121 #define DIGI_PARITY_MARK 3
122 #define DIGI_PARITY_SPACE 4
124 #define DIGI_STOP_BITS_1 0
125 #define DIGI_STOP_BITS_2 1
127 #define DIGI_INPUT_FLOW_CONTROL_XON_XOFF 1
128 #define DIGI_INPUT_FLOW_CONTROL_RTS 2
129 #define DIGI_INPUT_FLOW_CONTROL_DTR 4
131 #define DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF 1
132 #define DIGI_OUTPUT_FLOW_CONTROL_CTS 2
133 #define DIGI_OUTPUT_FLOW_CONTROL_DSR 4
135 #define DIGI_DTR_INACTIVE 0
136 #define DIGI_DTR_ACTIVE 1
137 #define DIGI_DTR_INPUT_FLOW_CONTROL 2
139 #define DIGI_RTS_INACTIVE 0
140 #define DIGI_RTS_ACTIVE 1
141 #define DIGI_RTS_INPUT_FLOW_CONTROL 2
142 #define DIGI_RTS_TOGGLE 3
144 #define DIGI_FLUSH_TX 1
145 #define DIGI_FLUSH_RX 2
146 #define DIGI_RESUME_TX 4 /* clears xoff condition */
148 #define DIGI_TRANSMIT_NOT_IDLE 0
149 #define DIGI_TRANSMIT_IDLE 1
151 #define DIGI_DISABLE 0
152 #define DIGI_ENABLE 1
154 #define DIGI_DEASSERT 0
155 #define DIGI_ASSERT 1
157 /* in band status codes */
158 #define DIGI_OVERRUN_ERROR 4
159 #define DIGI_PARITY_ERROR 8
160 #define DIGI_FRAMING_ERROR 16
161 #define DIGI_BREAK_ERROR 32
163 /* out of band status */
164 #define DIGI_NO_ERROR 0
165 #define DIGI_BAD_FIRST_PARAMETER 1
166 #define DIGI_BAD_SECOND_PARAMETER 2
167 #define DIGI_INVALID_LINE 3
168 #define DIGI_INVALID_OPCODE 4
171 #define DIGI_READ_INPUT_SIGNALS_SLOT 1
172 #define DIGI_READ_INPUT_SIGNALS_ERR 2
173 #define DIGI_READ_INPUT_SIGNALS_BUSY 4
174 #define DIGI_READ_INPUT_SIGNALS_PE 8
175 #define DIGI_READ_INPUT_SIGNALS_CTS 16
176 #define DIGI_READ_INPUT_SIGNALS_DSR 32
177 #define DIGI_READ_INPUT_SIGNALS_RI 64
178 #define DIGI_READ_INPUT_SIGNALS_DCD 128
184 spinlock_t ds_serial_lock;
185 struct usb_serial_port *ds_oob_port; /* out-of-band port */
186 int ds_oob_port_num; /* index of out-of-band port */
187 int ds_device_started;
191 spinlock_t dp_port_lock;
194 unsigned char dp_out_buf[DIGI_OUT_BUF_SIZE];
195 int dp_write_urb_in_use;
196 unsigned int dp_modem_signals;
197 int dp_transmit_idle;
198 wait_queue_head_t dp_transmit_idle_wait;
200 int dp_throttle_restart;
201 wait_queue_head_t dp_flush_wait;
202 wait_queue_head_t dp_close_wait; /* wait queue for close */
203 struct usb_serial_port *dp_port;
207 /* Local Function Declarations */
209 static int digi_write_oob_command(struct usb_serial_port *port,
210 unsigned char *buf, int count, int interruptible);
211 static int digi_write_inb_command(struct usb_serial_port *port,
212 unsigned char *buf, int count, unsigned long timeout);
213 static int digi_set_modem_signals(struct usb_serial_port *port,
214 unsigned int modem_signals, int interruptible);
215 static int digi_transmit_idle(struct usb_serial_port *port,
216 unsigned long timeout);
217 static void digi_rx_throttle(struct tty_struct *tty);
218 static void digi_rx_unthrottle(struct tty_struct *tty);
219 static void digi_set_termios(struct tty_struct *tty,
220 struct usb_serial_port *port, struct ktermios *old_termios);
221 static void digi_break_ctl(struct tty_struct *tty, int break_state);
222 static int digi_tiocmget(struct tty_struct *tty);
223 static int digi_tiocmset(struct tty_struct *tty, unsigned int set,
225 static int digi_write(struct tty_struct *tty, struct usb_serial_port *port,
226 const unsigned char *buf, int count);
227 static void digi_write_bulk_callback(struct urb *urb);
228 static int digi_write_room(struct tty_struct *tty);
229 static int digi_chars_in_buffer(struct tty_struct *tty);
230 static int digi_open(struct tty_struct *tty, struct usb_serial_port *port);
231 static void digi_close(struct usb_serial_port *port);
232 static void digi_dtr_rts(struct usb_serial_port *port, int on);
233 static int digi_startup_device(struct usb_serial *serial);
234 static int digi_startup(struct usb_serial *serial);
235 static void digi_disconnect(struct usb_serial *serial);
236 static void digi_release(struct usb_serial *serial);
237 static int digi_port_probe(struct usb_serial_port *port);
238 static int digi_port_remove(struct usb_serial_port *port);
239 static void digi_read_bulk_callback(struct urb *urb);
240 static int digi_read_inb_callback(struct urb *urb);
241 static int digi_read_oob_callback(struct urb *urb);
244 static const struct usb_device_id id_table_combined[] = {
245 { USB_DEVICE(DIGI_VENDOR_ID, DIGI_2_ID) },
246 { USB_DEVICE(DIGI_VENDOR_ID, DIGI_4_ID) },
247 { } /* Terminating entry */
250 static const struct usb_device_id id_table_2[] = {
251 { USB_DEVICE(DIGI_VENDOR_ID, DIGI_2_ID) },
252 { } /* Terminating entry */
255 static const struct usb_device_id id_table_4[] = {
256 { USB_DEVICE(DIGI_VENDOR_ID, DIGI_4_ID) },
257 { } /* Terminating entry */
260 MODULE_DEVICE_TABLE(usb, id_table_combined);
262 /* device info needed for the Digi serial converter */
264 static struct usb_serial_driver digi_acceleport_2_device = {
266 .owner = THIS_MODULE,
269 .description = "Digi 2 port USB adapter",
270 .id_table = id_table_2,
274 .dtr_rts = digi_dtr_rts,
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,
293 static struct usb_serial_driver digi_acceleport_4_device = {
295 .owner = THIS_MODULE,
298 .description = "Digi 4 port USB adapter",
299 .id_table = id_table_4,
304 .write_room = digi_write_room,
305 .write_bulk_callback = digi_write_bulk_callback,
306 .read_bulk_callback = digi_read_bulk_callback,
307 .chars_in_buffer = digi_chars_in_buffer,
308 .throttle = digi_rx_throttle,
309 .unthrottle = digi_rx_unthrottle,
310 .set_termios = digi_set_termios,
311 .break_ctl = digi_break_ctl,
312 .tiocmget = digi_tiocmget,
313 .tiocmset = digi_tiocmset,
314 .attach = digi_startup,
315 .disconnect = digi_disconnect,
316 .release = digi_release,
317 .port_probe = digi_port_probe,
318 .port_remove = digi_port_remove,
321 static struct usb_serial_driver * const serial_drivers[] = {
322 &digi_acceleport_2_device, &digi_acceleport_4_device, NULL
328 * Cond Wait Interruptible Timeout Irqrestore
330 * Do spin_unlock_irqrestore and interruptible_sleep_on_timeout
331 * so that wake ups are not lost if they occur between the unlock
332 * and the sleep. In other words, spin_unlock_irqrestore and
333 * interruptible_sleep_on_timeout are "atomic" with respect to
334 * wake ups. This is used to implement condition variables.
336 * interruptible_sleep_on_timeout is deprecated and has been replaced
337 * with the equivalent code.
340 static long cond_wait_interruptible_timeout_irqrestore(
341 wait_queue_head_t *q, long timeout,
342 spinlock_t *lock, unsigned long flags)
347 prepare_to_wait(q, &wait, TASK_INTERRUPTIBLE);
348 spin_unlock_irqrestore(lock, flags);
349 timeout = schedule_timeout(timeout);
350 finish_wait(q, &wait);
356 * Digi Write OOB Command
358 * Write commands on the out of band port. Commands are 4
359 * bytes each, multiple commands can be sent at once, and
360 * no command will be split across USB packets. Returns 0
361 * if successful, -EINTR if interrupted while sleeping and
362 * the interruptible flag is true, or a negative error
363 * returned by usb_submit_urb.
366 static int digi_write_oob_command(struct usb_serial_port *port,
367 unsigned char *buf, int count, int interruptible)
371 struct usb_serial_port *oob_port = (struct usb_serial_port *)((struct digi_serial *)(usb_get_serial_data(port->serial)))->ds_oob_port;
372 struct digi_port *oob_priv = usb_get_serial_port_data(oob_port);
373 unsigned long flags = 0;
376 "digi_write_oob_command: TOP: port=%d, count=%d\n",
377 oob_priv->dp_port_num, count);
379 spin_lock_irqsave(&oob_priv->dp_port_lock, flags);
381 while (oob_priv->dp_write_urb_in_use) {
382 cond_wait_interruptible_timeout_irqrestore(
383 &oob_port->write_wait, DIGI_RETRY_TIMEOUT,
384 &oob_priv->dp_port_lock, flags);
385 if (interruptible && signal_pending(current))
387 spin_lock_irqsave(&oob_priv->dp_port_lock, flags);
390 /* len must be a multiple of 4, so commands are not split */
391 len = min(count, oob_port->bulk_out_size);
394 memcpy(oob_port->write_urb->transfer_buffer, buf, len);
395 oob_port->write_urb->transfer_buffer_length = len;
396 ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC);
398 oob_priv->dp_write_urb_in_use = 1;
403 spin_unlock_irqrestore(&oob_priv->dp_port_lock, flags);
405 dev_err(&port->dev, "%s: usb_submit_urb failed, ret=%d\n",
413 * Digi Write In Band Command
415 * Write commands on the given port. Commands are 4
416 * bytes each, multiple commands can be sent at once, and
417 * no command will be split across USB packets. If timeout
418 * is non-zero, write in band command will return after
419 * waiting unsuccessfully for the URB status to clear for
420 * timeout ticks. Returns 0 if successful, or a negative
421 * error returned by digi_write.
424 static int digi_write_inb_command(struct usb_serial_port *port,
425 unsigned char *buf, int count, unsigned long timeout)
429 struct digi_port *priv = usb_get_serial_port_data(port);
430 unsigned char *data = port->write_urb->transfer_buffer;
431 unsigned long flags = 0;
433 dev_dbg(&port->dev, "digi_write_inb_command: TOP: port=%d, count=%d\n",
434 priv->dp_port_num, count);
441 spin_lock_irqsave(&priv->dp_port_lock, flags);
442 while (count > 0 && ret == 0) {
443 while (priv->dp_write_urb_in_use &&
444 time_before(jiffies, timeout)) {
445 cond_wait_interruptible_timeout_irqrestore(
446 &port->write_wait, DIGI_RETRY_TIMEOUT,
447 &priv->dp_port_lock, flags);
448 if (signal_pending(current))
450 spin_lock_irqsave(&priv->dp_port_lock, flags);
453 /* len must be a multiple of 4 and small enough to */
454 /* guarantee the write will send buffered data first, */
455 /* so commands are in order with data and not split */
456 len = min(count, port->bulk_out_size-2-priv->dp_out_buf_len);
460 /* write any buffered data first */
461 if (priv->dp_out_buf_len > 0) {
462 data[0] = DIGI_CMD_SEND_DATA;
463 data[1] = priv->dp_out_buf_len;
464 memcpy(data + 2, priv->dp_out_buf,
465 priv->dp_out_buf_len);
466 memcpy(data + 2 + priv->dp_out_buf_len, buf, len);
467 port->write_urb->transfer_buffer_length
468 = priv->dp_out_buf_len + 2 + len;
470 memcpy(data, buf, len);
471 port->write_urb->transfer_buffer_length = len;
474 ret = usb_submit_urb(port->write_urb, GFP_ATOMIC);
476 priv->dp_write_urb_in_use = 1;
477 priv->dp_out_buf_len = 0;
483 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
487 "%s: usb_submit_urb failed, ret=%d, port=%d\n",
488 __func__, ret, priv->dp_port_num);
494 * Digi Set Modem Signals
496 * Sets or clears DTR and RTS on the port, according to the
497 * modem_signals argument. Use TIOCM_DTR and TIOCM_RTS flags
498 * for the modem_signals argument. Returns 0 if successful,
499 * -EINTR if interrupted while sleeping, or a non-zero error
500 * returned by usb_submit_urb.
503 static int digi_set_modem_signals(struct usb_serial_port *port,
504 unsigned int modem_signals, int interruptible)
508 struct digi_port *port_priv = usb_get_serial_port_data(port);
509 struct usb_serial_port *oob_port = (struct usb_serial_port *) ((struct digi_serial *)(usb_get_serial_data(port->serial)))->ds_oob_port;
510 struct digi_port *oob_priv = usb_get_serial_port_data(oob_port);
511 unsigned char *data = oob_port->write_urb->transfer_buffer;
512 unsigned long flags = 0;
516 "digi_set_modem_signals: TOP: port=%d, modem_signals=0x%x\n",
517 port_priv->dp_port_num, modem_signals);
519 spin_lock_irqsave(&oob_priv->dp_port_lock, flags);
520 spin_lock(&port_priv->dp_port_lock);
522 while (oob_priv->dp_write_urb_in_use) {
523 spin_unlock(&port_priv->dp_port_lock);
524 cond_wait_interruptible_timeout_irqrestore(
525 &oob_port->write_wait, DIGI_RETRY_TIMEOUT,
526 &oob_priv->dp_port_lock, flags);
527 if (interruptible && signal_pending(current))
529 spin_lock_irqsave(&oob_priv->dp_port_lock, flags);
530 spin_lock(&port_priv->dp_port_lock);
532 data[0] = DIGI_CMD_SET_DTR_SIGNAL;
533 data[1] = port_priv->dp_port_num;
534 data[2] = (modem_signals & TIOCM_DTR) ?
535 DIGI_DTR_ACTIVE : DIGI_DTR_INACTIVE;
537 data[4] = DIGI_CMD_SET_RTS_SIGNAL;
538 data[5] = port_priv->dp_port_num;
539 data[6] = (modem_signals & TIOCM_RTS) ?
540 DIGI_RTS_ACTIVE : DIGI_RTS_INACTIVE;
543 oob_port->write_urb->transfer_buffer_length = 8;
545 ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC);
547 oob_priv->dp_write_urb_in_use = 1;
548 port_priv->dp_modem_signals =
549 (port_priv->dp_modem_signals&~(TIOCM_DTR|TIOCM_RTS))
550 | (modem_signals&(TIOCM_DTR|TIOCM_RTS));
552 spin_unlock(&port_priv->dp_port_lock);
553 spin_unlock_irqrestore(&oob_priv->dp_port_lock, flags);
555 dev_err(&port->dev, "%s: usb_submit_urb failed, ret=%d\n",
563 * Digi transmit idle waits, up to timeout ticks, for the transmitter
564 * to go idle. It returns 0 if successful or a negative error.
566 * There are race conditions here if more than one process is calling
567 * digi_transmit_idle on the same port at the same time. However, this
568 * is only called from close, and only one process can be in close on a
569 * port at a time, so its ok.
572 static int digi_transmit_idle(struct usb_serial_port *port,
573 unsigned long timeout)
576 unsigned char buf[2];
577 struct digi_port *priv = usb_get_serial_port_data(port);
578 unsigned long flags = 0;
580 spin_lock_irqsave(&priv->dp_port_lock, flags);
581 priv->dp_transmit_idle = 0;
582 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
584 buf[0] = DIGI_CMD_TRANSMIT_IDLE;
589 ret = digi_write_inb_command(port, buf, 2, timeout - jiffies);
593 spin_lock_irqsave(&priv->dp_port_lock, flags);
595 while (time_before(jiffies, timeout) && !priv->dp_transmit_idle) {
596 cond_wait_interruptible_timeout_irqrestore(
597 &priv->dp_transmit_idle_wait, DIGI_RETRY_TIMEOUT,
598 &priv->dp_port_lock, flags);
599 if (signal_pending(current))
601 spin_lock_irqsave(&priv->dp_port_lock, flags);
603 priv->dp_transmit_idle = 0;
604 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
610 static void digi_rx_throttle(struct tty_struct *tty)
613 struct usb_serial_port *port = tty->driver_data;
614 struct digi_port *priv = usb_get_serial_port_data(port);
616 /* stop receiving characters by not resubmitting the read urb */
617 spin_lock_irqsave(&priv->dp_port_lock, flags);
618 priv->dp_throttled = 1;
619 priv->dp_throttle_restart = 0;
620 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
624 static void digi_rx_unthrottle(struct tty_struct *tty)
628 struct usb_serial_port *port = tty->driver_data;
629 struct digi_port *priv = usb_get_serial_port_data(port);
631 spin_lock_irqsave(&priv->dp_port_lock, flags);
633 /* restart read chain */
634 if (priv->dp_throttle_restart)
635 ret = usb_submit_urb(port->read_urb, GFP_ATOMIC);
637 /* turn throttle off */
638 priv->dp_throttled = 0;
639 priv->dp_throttle_restart = 0;
641 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
645 "%s: usb_submit_urb failed, ret=%d, port=%d\n",
646 __func__, ret, priv->dp_port_num);
650 static void digi_set_termios(struct tty_struct *tty,
651 struct usb_serial_port *port, struct ktermios *old_termios)
653 struct digi_port *priv = usb_get_serial_port_data(port);
654 struct device *dev = &port->dev;
655 unsigned int iflag = tty->termios.c_iflag;
656 unsigned int cflag = tty->termios.c_cflag;
657 unsigned int old_iflag = old_termios->c_iflag;
658 unsigned int old_cflag = old_termios->c_cflag;
659 unsigned char buf[32];
660 unsigned int modem_signals;
666 "digi_set_termios: TOP: port=%d, iflag=0x%x, old_iflag=0x%x, cflag=0x%x, old_cflag=0x%x\n",
667 priv->dp_port_num, iflag, old_iflag, cflag, old_cflag);
670 baud = tty_get_baud_rate(tty);
671 if (baud != tty_termios_baud_rate(old_termios)) {
674 /* reassert DTR and (maybe) RTS on transition from B0 */
675 if ((old_cflag&CBAUD) == B0) {
676 /* don't set RTS if using hardware flow control */
677 /* and throttling input */
678 modem_signals = TIOCM_DTR;
679 if (!(tty->termios.c_cflag & CRTSCTS) ||
680 !test_bit(TTY_THROTTLED, &tty->flags))
681 modem_signals |= TIOCM_RTS;
682 digi_set_modem_signals(port, modem_signals, 1);
685 /* drop DTR and RTS on transition to B0 */
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;
706 arg = DIGI_BAUD_9600;
711 buf[i++] = DIGI_CMD_SET_BAUD_RATE;
712 buf[i++] = priv->dp_port_num;
718 tty->termios.c_cflag &= ~CMSPAR;
720 if ((cflag&(PARENB|PARODD)) != (old_cflag&(PARENB|PARODD))) {
723 arg = DIGI_PARITY_ODD;
725 arg = DIGI_PARITY_EVEN;
727 arg = DIGI_PARITY_NONE;
729 buf[i++] = DIGI_CMD_SET_PARITY;
730 buf[i++] = priv->dp_port_num;
735 if ((cflag&CSIZE) != (old_cflag&CSIZE)) {
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;
744 "digi_set_termios: can't handle word size %d\n",
750 buf[i++] = DIGI_CMD_SET_WORD_SIZE;
751 buf[i++] = priv->dp_port_num;
759 if ((cflag&CSTOPB) != (old_cflag&CSTOPB)) {
762 arg = DIGI_STOP_BITS_2;
764 arg = DIGI_STOP_BITS_1;
766 buf[i++] = DIGI_CMD_SET_STOP_BITS;
767 buf[i++] = priv->dp_port_num;
773 /* set input flow control */
774 if ((iflag&IXOFF) != (old_iflag&IXOFF)
775 || (cflag&CRTSCTS) != (old_cflag&CRTSCTS)) {
778 arg |= DIGI_INPUT_FLOW_CONTROL_XON_XOFF;
780 arg &= ~DIGI_INPUT_FLOW_CONTROL_XON_XOFF;
783 arg |= DIGI_INPUT_FLOW_CONTROL_RTS;
785 /* On USB-4 it is necessary to assert RTS prior */
786 /* to selecting RTS input flow control. */
787 buf[i++] = DIGI_CMD_SET_RTS_SIGNAL;
788 buf[i++] = priv->dp_port_num;
789 buf[i++] = DIGI_RTS_ACTIVE;
793 arg &= ~DIGI_INPUT_FLOW_CONTROL_RTS;
795 buf[i++] = DIGI_CMD_SET_INPUT_FLOW_CONTROL;
796 buf[i++] = priv->dp_port_num;
801 /* set output flow control */
802 if ((iflag & IXON) != (old_iflag & IXON)
803 || (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
806 arg |= DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF;
808 arg &= ~DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF;
810 if (cflag & CRTSCTS) {
811 arg |= DIGI_OUTPUT_FLOW_CONTROL_CTS;
813 arg &= ~DIGI_OUTPUT_FLOW_CONTROL_CTS;
816 buf[i++] = DIGI_CMD_SET_OUTPUT_FLOW_CONTROL;
817 buf[i++] = priv->dp_port_num;
822 /* set receive enable/disable */
823 if ((cflag & CREAD) != (old_cflag & CREAD)) {
829 buf[i++] = DIGI_CMD_RECEIVE_ENABLE;
830 buf[i++] = priv->dp_port_num;
834 ret = digi_write_oob_command(port, buf, i, 1);
836 dev_dbg(dev, "digi_set_termios: write oob failed, ret=%d\n", ret);
837 tty_encode_baud_rate(tty, baud, baud);
841 static void digi_break_ctl(struct tty_struct *tty, int break_state)
843 struct usb_serial_port *port = tty->driver_data;
844 unsigned char buf[4];
846 buf[0] = DIGI_CMD_BREAK_CONTROL;
847 buf[1] = 2; /* length */
848 buf[2] = break_state ? 1 : 0;
849 buf[3] = 0; /* pad */
850 digi_write_inb_command(port, buf, 4, 0);
854 static int digi_tiocmget(struct tty_struct *tty)
856 struct usb_serial_port *port = tty->driver_data;
857 struct digi_port *priv = usb_get_serial_port_data(port);
861 spin_lock_irqsave(&priv->dp_port_lock, flags);
862 val = priv->dp_modem_signals;
863 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
868 static int digi_tiocmset(struct tty_struct *tty,
869 unsigned int set, unsigned int clear)
871 struct usb_serial_port *port = tty->driver_data;
872 struct digi_port *priv = usb_get_serial_port_data(port);
876 spin_lock_irqsave(&priv->dp_port_lock, flags);
877 val = (priv->dp_modem_signals & ~clear) | set;
878 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
879 return digi_set_modem_signals(port, val, 1);
883 static int digi_write(struct tty_struct *tty, struct usb_serial_port *port,
884 const unsigned char *buf, int count)
887 int ret, data_len, new_len;
888 struct digi_port *priv = usb_get_serial_port_data(port);
889 unsigned char *data = port->write_urb->transfer_buffer;
890 unsigned long flags = 0;
893 "digi_write: TOP: port=%d, count=%d, in_interrupt=%ld\n",
894 priv->dp_port_num, count, in_interrupt());
896 /* copy user data (which can sleep) before getting spin lock */
897 count = min(count, port->bulk_out_size-2);
898 count = min(64, count);
900 /* be sure only one write proceeds at a time */
901 /* there are races on the port private buffer */
902 spin_lock_irqsave(&priv->dp_port_lock, flags);
904 /* wait for urb status clear to submit another urb */
905 if (priv->dp_write_urb_in_use) {
906 /* buffer data if count is 1 (probably put_char) if possible */
907 if (count == 1 && priv->dp_out_buf_len < DIGI_OUT_BUF_SIZE) {
908 priv->dp_out_buf[priv->dp_out_buf_len++] = *buf;
913 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
917 /* allow space for any buffered data and for new data, up to */
918 /* transfer buffer size - 2 (for command and length bytes) */
919 new_len = min(count, port->bulk_out_size-2-priv->dp_out_buf_len);
920 data_len = new_len + priv->dp_out_buf_len;
923 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
927 port->write_urb->transfer_buffer_length = data_len+2;
929 *data++ = DIGI_CMD_SEND_DATA;
932 /* copy in buffered data first */
933 memcpy(data, priv->dp_out_buf, priv->dp_out_buf_len);
934 data += priv->dp_out_buf_len;
936 /* copy in new data */
937 memcpy(data, buf, new_len);
939 ret = usb_submit_urb(port->write_urb, GFP_ATOMIC);
941 priv->dp_write_urb_in_use = 1;
943 priv->dp_out_buf_len = 0;
946 /* return length of new data written, or error */
947 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
949 dev_err_console(port,
950 "%s: usb_submit_urb failed, ret=%d, port=%d\n",
951 __func__, ret, priv->dp_port_num);
952 dev_dbg(&port->dev, "digi_write: returning %d\n", ret);
957 static void digi_write_bulk_callback(struct urb *urb)
960 struct usb_serial_port *port = urb->context;
961 struct usb_serial *serial;
962 struct digi_port *priv;
963 struct digi_serial *serial_priv;
965 int status = urb->status;
968 /* port and serial sanity check */
969 if (port == NULL || (priv = usb_get_serial_port_data(port)) == NULL) {
970 pr_err("%s: port or port->private is NULL, status=%d\n",
974 serial = port->serial;
975 if (serial == NULL || (serial_priv = usb_get_serial_data(serial)) == NULL) {
977 "%s: serial or serial->private is NULL, status=%d\n",
982 /* handle oob callback */
983 if (priv->dp_port_num == serial_priv->ds_oob_port_num) {
984 dev_dbg(&port->dev, "digi_write_bulk_callback: oob callback\n");
985 spin_lock(&priv->dp_port_lock);
986 priv->dp_write_urb_in_use = 0;
987 wake_up_interruptible(&port->write_wait);
988 spin_unlock(&priv->dp_port_lock);
992 /* try to send any buffered data on this port */
994 spin_lock(&priv->dp_port_lock);
995 priv->dp_write_urb_in_use = 0;
996 if (priv->dp_out_buf_len > 0) {
997 *((unsigned char *)(port->write_urb->transfer_buffer))
998 = (unsigned char)DIGI_CMD_SEND_DATA;
999 *((unsigned char *)(port->write_urb->transfer_buffer) + 1)
1000 = (unsigned char)priv->dp_out_buf_len;
1001 port->write_urb->transfer_buffer_length =
1002 priv->dp_out_buf_len + 2;
1003 memcpy(port->write_urb->transfer_buffer + 2, priv->dp_out_buf,
1004 priv->dp_out_buf_len);
1005 ret = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1007 priv->dp_write_urb_in_use = 1;
1008 priv->dp_out_buf_len = 0;
1012 spin_unlock(&priv->dp_port_lock);
1014 if (ret && ret != -EPERM)
1015 dev_err_console(port,
1016 "%s: usb_submit_urb failed, ret=%d, port=%d\n",
1017 __func__, ret, priv->dp_port_num);
1020 tty_port_tty_wakeup(&port->port);
1023 static int digi_write_room(struct tty_struct *tty)
1025 struct usb_serial_port *port = tty->driver_data;
1026 struct digi_port *priv = usb_get_serial_port_data(port);
1028 unsigned long flags = 0;
1030 spin_lock_irqsave(&priv->dp_port_lock, flags);
1032 if (priv->dp_write_urb_in_use)
1035 room = port->bulk_out_size - 2 - priv->dp_out_buf_len;
1037 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
1038 dev_dbg(&port->dev, "digi_write_room: port=%d, room=%d\n", priv->dp_port_num, room);
1043 static int digi_chars_in_buffer(struct tty_struct *tty)
1045 struct usb_serial_port *port = tty->driver_data;
1046 struct digi_port *priv = usb_get_serial_port_data(port);
1048 if (priv->dp_write_urb_in_use) {
1049 dev_dbg(&port->dev, "digi_chars_in_buffer: port=%d, chars=%d\n",
1050 priv->dp_port_num, port->bulk_out_size - 2);
1051 /* return(port->bulk_out_size - 2); */
1054 dev_dbg(&port->dev, "digi_chars_in_buffer: port=%d, chars=%d\n",
1055 priv->dp_port_num, priv->dp_out_buf_len);
1056 return priv->dp_out_buf_len;
1061 static void digi_dtr_rts(struct usb_serial_port *port, int on)
1063 /* Adjust DTR and RTS */
1064 digi_set_modem_signals(port, on * (TIOCM_DTR|TIOCM_RTS), 1);
1067 static int digi_open(struct tty_struct *tty, struct usb_serial_port *port)
1070 unsigned char buf[32];
1071 struct digi_port *priv = usb_get_serial_port_data(port);
1072 struct ktermios not_termios;
1074 /* be sure the device is started up */
1075 if (digi_startup_device(port->serial) != 0)
1078 /* read modem signals automatically whenever they change */
1079 buf[0] = DIGI_CMD_READ_INPUT_SIGNALS;
1080 buf[1] = priv->dp_port_num;
1081 buf[2] = DIGI_ENABLE;
1085 buf[4] = DIGI_CMD_IFLUSH_FIFO;
1086 buf[5] = priv->dp_port_num;
1087 buf[6] = DIGI_FLUSH_TX | DIGI_FLUSH_RX;
1090 ret = digi_write_oob_command(port, buf, 8, 1);
1092 dev_dbg(&port->dev, "digi_open: write oob failed, ret=%d\n", ret);
1094 /* set termios settings */
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);
1104 static void digi_close(struct usb_serial_port *port)
1108 unsigned char buf[32];
1109 struct digi_port *priv = usb_get_serial_port_data(port);
1111 mutex_lock(&port->serial->disc_mutex);
1112 /* if disconnected, just clear flags */
1113 if (port->serial->disconnected)
1116 /* FIXME: Transmit idle belongs in the wait_unti_sent path */
1117 digi_transmit_idle(port, DIGI_CLOSE_TIMEOUT);
1119 /* disable input flow control */
1120 buf[0] = DIGI_CMD_SET_INPUT_FLOW_CONTROL;
1121 buf[1] = priv->dp_port_num;
1122 buf[2] = DIGI_DISABLE;
1125 /* disable output flow control */
1126 buf[4] = DIGI_CMD_SET_OUTPUT_FLOW_CONTROL;
1127 buf[5] = priv->dp_port_num;
1128 buf[6] = DIGI_DISABLE;
1131 /* disable reading modem signals automatically */
1132 buf[8] = DIGI_CMD_READ_INPUT_SIGNALS;
1133 buf[9] = priv->dp_port_num;
1134 buf[10] = DIGI_DISABLE;
1137 /* disable receive */
1138 buf[12] = DIGI_CMD_RECEIVE_ENABLE;
1139 buf[13] = priv->dp_port_num;
1140 buf[14] = DIGI_DISABLE;
1144 buf[16] = DIGI_CMD_IFLUSH_FIFO;
1145 buf[17] = priv->dp_port_num;
1146 buf[18] = DIGI_FLUSH_TX | DIGI_FLUSH_RX;
1149 ret = digi_write_oob_command(port, buf, 20, 0);
1151 dev_dbg(&port->dev, "digi_close: write oob failed, ret=%d\n",
1153 /* wait for final commands on oob port to complete */
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);
1159 /* shutdown any outstanding bulk writes */
1160 usb_kill_urb(port->write_urb);
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);
1171 * Digi Startup Device
1173 * Starts reads on all ports. Must be called AFTER startup, with
1174 * urbs initialized. Returns 0 if successful, non-zero error otherwise.
1177 static int digi_startup_device(struct usb_serial *serial)
1180 struct digi_serial *serial_priv = usb_get_serial_data(serial);
1181 struct usb_serial_port *port;
1183 /* be sure this happens exactly once */
1184 spin_lock(&serial_priv->ds_serial_lock);
1185 if (serial_priv->ds_device_started) {
1186 spin_unlock(&serial_priv->ds_serial_lock);
1189 serial_priv->ds_device_started = 1;
1190 spin_unlock(&serial_priv->ds_serial_lock);
1192 /* start reading from each bulk in endpoint for the device */
1193 /* set USB_DISABLE_SPD flag for write bulk urbs */
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);
1199 "%s: usb_submit_urb failed, ret=%d, port=%d\n",
1207 static int digi_port_init(struct usb_serial_port *port, unsigned port_num)
1209 struct digi_port *priv;
1211 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
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 priv->dp_port = port;
1222 init_waitqueue_head(&port->write_wait);
1224 usb_set_serial_port_data(port, priv);
1229 static int digi_startup(struct usb_serial *serial)
1231 struct device *dev = &serial->interface->dev;
1232 struct digi_serial *serial_priv;
1236 /* check whether the device has the expected number of endpoints */
1237 if (serial->num_port_pointers < serial->type->num_ports + 1) {
1238 dev_err(dev, "OOB endpoints missing\n");
1242 for (i = 0; i < serial->type->num_ports + 1 ; i++) {
1243 if (!serial->port[i]->read_urb) {
1244 dev_err(dev, "bulk-in endpoint missing\n");
1247 if (!serial->port[i]->write_urb) {
1248 dev_err(dev, "bulk-out endpoint missing\n");
1253 serial_priv = kzalloc(sizeof(*serial_priv), GFP_KERNEL);
1257 spin_lock_init(&serial_priv->ds_serial_lock);
1258 serial_priv->ds_oob_port_num = serial->type->num_ports;
1259 serial_priv->ds_oob_port = serial->port[serial_priv->ds_oob_port_num];
1261 ret = digi_port_init(serial_priv->ds_oob_port,
1262 serial_priv->ds_oob_port_num);
1268 usb_set_serial_data(serial, serial_priv);
1274 static void digi_disconnect(struct usb_serial *serial)
1278 /* stop reads and writes on all ports */
1279 for (i = 0; i < serial->type->num_ports + 1; i++) {
1280 usb_kill_urb(serial->port[i]->read_urb);
1281 usb_kill_urb(serial->port[i]->write_urb);
1286 static void digi_release(struct usb_serial *serial)
1288 struct digi_serial *serial_priv;
1289 struct digi_port *priv;
1291 serial_priv = usb_get_serial_data(serial);
1293 priv = usb_get_serial_port_data(serial_priv->ds_oob_port);
1299 static int digi_port_probe(struct usb_serial_port *port)
1301 return digi_port_init(port, port->port_number);
1304 static int digi_port_remove(struct usb_serial_port *port)
1306 struct digi_port *priv;
1308 priv = usb_get_serial_port_data(port);
1314 static void digi_read_bulk_callback(struct urb *urb)
1316 struct usb_serial_port *port = urb->context;
1317 struct digi_port *priv;
1318 struct digi_serial *serial_priv;
1320 int status = urb->status;
1322 /* port sanity check, do not resubmit if port is not valid */
1325 priv = usb_get_serial_port_data(port);
1327 dev_err(&port->dev, "%s: port->private is NULL, status=%d\n",
1331 if (port->serial == NULL ||
1332 (serial_priv = usb_get_serial_data(port->serial)) == NULL) {
1333 dev_err(&port->dev, "%s: serial is bad or serial->private "
1334 "is NULL, status=%d\n", __func__, status);
1338 /* do not resubmit urb if it has any status error */
1341 "%s: nonzero read bulk status: status=%d, port=%d\n",
1342 __func__, status, priv->dp_port_num);
1346 /* handle oob or inb callback, do not resubmit if error */
1347 if (priv->dp_port_num == serial_priv->ds_oob_port_num) {
1348 if (digi_read_oob_callback(urb) != 0)
1351 if (digi_read_inb_callback(urb) != 0)
1356 ret = usb_submit_urb(urb, GFP_ATOMIC);
1357 if (ret != 0 && ret != -EPERM) {
1359 "%s: failed resubmitting urb, ret=%d, port=%d\n",
1360 __func__, ret, priv->dp_port_num);
1366 * Digi Read INB Callback
1368 * Digi Read INB Callback handles reads on the in band ports, sending
1369 * the data on to the tty subsystem. When called we know port and
1370 * port->private are not NULL and port->serial has been validated.
1371 * It returns 0 if successful, 1 if successful but the port is
1372 * throttled, and -1 if the sanity checks failed.
1375 static int digi_read_inb_callback(struct urb *urb)
1377 struct usb_serial_port *port = urb->context;
1378 struct digi_port *priv = usb_get_serial_port_data(port);
1379 unsigned char *buf = urb->transfer_buffer;
1383 unsigned char *data;
1384 int flag, throttled;
1386 /* short/multiple packet check */
1387 if (urb->actual_length < 2) {
1388 dev_warn(&port->dev, "short packet received\n");
1395 if (urb->actual_length != len + 2) {
1396 dev_err(&port->dev, "malformed packet received: port=%d, opcode=%d, len=%d, actual_length=%u\n",
1397 priv->dp_port_num, opcode, len, urb->actual_length);
1401 if (opcode == DIGI_CMD_RECEIVE_DATA && len < 1) {
1402 dev_err(&port->dev, "malformed data packet received\n");
1406 spin_lock(&priv->dp_port_lock);
1408 /* check for throttle; if set, do not resubmit read urb */
1409 /* indicate the read chain needs to be restarted on unthrottle */
1410 throttled = priv->dp_throttled;
1412 priv->dp_throttle_restart = 1;
1415 if (opcode == DIGI_CMD_RECEIVE_DATA) {
1416 port_status = buf[2];
1419 /* get flag from port_status */
1422 /* overrun is special, not associated with a char */
1423 if (port_status & DIGI_OVERRUN_ERROR)
1424 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
1426 /* break takes precedence over parity, */
1427 /* which takes precedence over framing errors */
1428 if (port_status & DIGI_BREAK_ERROR)
1430 else if (port_status & DIGI_PARITY_ERROR)
1432 else if (port_status & DIGI_FRAMING_ERROR)
1435 /* data length is len-1 (one byte of len is port_status) */
1438 tty_insert_flip_string_fixed_flag(&port->port, data,
1440 tty_flip_buffer_push(&port->port);
1443 spin_unlock(&priv->dp_port_lock);
1445 if (opcode == DIGI_CMD_RECEIVE_DISABLE)
1446 dev_dbg(&port->dev, "%s: got RECEIVE_DISABLE\n", __func__);
1447 else if (opcode != DIGI_CMD_RECEIVE_DATA)
1448 dev_dbg(&port->dev, "%s: unknown opcode: %d\n", __func__, opcode);
1450 return throttled ? 1 : 0;
1456 * Digi Read OOB Callback
1458 * Digi Read OOB Callback handles reads on the out of band port.
1459 * When called we know port and port->private are not NULL and
1460 * the port->serial is valid. It returns 0 if successful, and
1461 * -1 if the sanity checks failed.
1464 static int digi_read_oob_callback(struct urb *urb)
1467 struct usb_serial_port *port = urb->context;
1468 struct usb_serial *serial = port->serial;
1469 struct tty_struct *tty;
1470 struct digi_port *priv = usb_get_serial_port_data(port);
1471 unsigned char *buf = urb->transfer_buffer;
1472 int opcode, line, status, val;
1476 if (urb->actual_length < 4)
1479 /* handle each oob command */
1480 for (i = 0; i < urb->actual_length - 3; i += 4) {
1483 status = buf[i + 2];
1486 dev_dbg(&port->dev, "digi_read_oob_callback: opcode=%d, line=%d, status=%d, val=%d\n",
1487 opcode, line, status, val);
1489 if (status != 0 || line >= serial->type->num_ports)
1492 port = serial->port[line];
1494 priv = usb_get_serial_port_data(port);
1498 tty = tty_port_tty_get(&port->port);
1502 rts = tty->termios.c_cflag & CRTSCTS;
1504 if (tty && opcode == DIGI_CMD_READ_INPUT_SIGNALS) {
1505 bool wakeup = false;
1507 spin_lock(&priv->dp_port_lock);
1508 /* convert from digi flags to termiox flags */
1509 if (val & DIGI_READ_INPUT_SIGNALS_CTS) {
1510 priv->dp_modem_signals |= TIOCM_CTS;
1514 priv->dp_modem_signals &= ~TIOCM_CTS;
1515 /* port must be open to use tty struct */
1517 if (val & DIGI_READ_INPUT_SIGNALS_DSR)
1518 priv->dp_modem_signals |= TIOCM_DSR;
1520 priv->dp_modem_signals &= ~TIOCM_DSR;
1521 if (val & DIGI_READ_INPUT_SIGNALS_RI)
1522 priv->dp_modem_signals |= TIOCM_RI;
1524 priv->dp_modem_signals &= ~TIOCM_RI;
1525 if (val & DIGI_READ_INPUT_SIGNALS_DCD)
1526 priv->dp_modem_signals |= TIOCM_CD;
1528 priv->dp_modem_signals &= ~TIOCM_CD;
1530 spin_unlock(&priv->dp_port_lock);
1533 tty_port_tty_wakeup(&port->port);
1534 } else if (opcode == DIGI_CMD_TRANSMIT_IDLE) {
1535 spin_lock(&priv->dp_port_lock);
1536 priv->dp_transmit_idle = 1;
1537 wake_up_interruptible(&priv->dp_transmit_idle_wait);
1538 spin_unlock(&priv->dp_port_lock);
1539 } else if (opcode == DIGI_CMD_IFLUSH_FIFO) {
1540 wake_up_interruptible(&priv->dp_flush_wait);
1548 module_usb_serial_driver(serial_drivers, id_table_combined);
1550 MODULE_AUTHOR(DRIVER_AUTHOR);
1551 MODULE_DESCRIPTION(DRIVER_DESC);
1552 MODULE_LICENSE("GPL");