1 // SPDX-License-Identifier: GPL-2.0+
3 * Digi AccelePort USB-4 and USB-2 Serial Converters
5 * Copyright 2000 by Digi International
7 * Shamelessly based on Brian Warner's keyspan_pda.c and Greg Kroah-Hartman's
10 * Peter Berger (pberger@brimson.com)
11 * Al Borchers (borchers@steinerpoint.com)
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>
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"
33 /* port output buffer length -- must be <= transfer buffer length - 2 */
34 /* so we can be sure to send the full buffer in one urb */
35 #define DIGI_OUT_BUF_SIZE 8
37 /* port input buffer length -- must be >= transfer buffer length - 3 */
38 /* so we can be sure to hold at least one full buffer from one urb */
39 #define DIGI_IN_BUF_SIZE 64
41 /* retry timeout while sleeping */
42 #define DIGI_RETRY_TIMEOUT (HZ/10)
44 /* timeout while waiting for tty output to drain in close */
45 /* this delay is used twice in close, so the total delay could */
46 /* be twice this value */
47 #define DIGI_CLOSE_TIMEOUT (5*HZ)
50 /* AccelePort USB Defines */
53 #define DIGI_VENDOR_ID 0x05c5
54 #define DIGI_2_ID 0x0002 /* USB-2 */
55 #define DIGI_4_ID 0x0004 /* USB-4 */
58 * "INB": can be used on the in-band endpoint
59 * "OOB": can be used on the out-of-band endpoint
61 #define DIGI_CMD_SET_BAUD_RATE 0 /* INB, OOB */
62 #define DIGI_CMD_SET_WORD_SIZE 1 /* INB, OOB */
63 #define DIGI_CMD_SET_PARITY 2 /* INB, OOB */
64 #define DIGI_CMD_SET_STOP_BITS 3 /* INB, OOB */
65 #define DIGI_CMD_SET_INPUT_FLOW_CONTROL 4 /* INB, OOB */
66 #define DIGI_CMD_SET_OUTPUT_FLOW_CONTROL 5 /* INB, OOB */
67 #define DIGI_CMD_SET_DTR_SIGNAL 6 /* INB, OOB */
68 #define DIGI_CMD_SET_RTS_SIGNAL 7 /* INB, OOB */
69 #define DIGI_CMD_READ_INPUT_SIGNALS 8 /* OOB */
70 #define DIGI_CMD_IFLUSH_FIFO 9 /* OOB */
71 #define DIGI_CMD_RECEIVE_ENABLE 10 /* INB, OOB */
72 #define DIGI_CMD_BREAK_CONTROL 11 /* INB, OOB */
73 #define DIGI_CMD_LOCAL_LOOPBACK 12 /* INB, OOB */
74 #define DIGI_CMD_TRANSMIT_IDLE 13 /* INB, OOB */
75 #define DIGI_CMD_READ_UART_REGISTER 14 /* OOB */
76 #define DIGI_CMD_WRITE_UART_REGISTER 15 /* INB, OOB */
77 #define DIGI_CMD_AND_UART_REGISTER 16 /* INB, OOB */
78 #define DIGI_CMD_OR_UART_REGISTER 17 /* INB, OOB */
79 #define DIGI_CMD_SEND_DATA 18 /* INB */
80 #define DIGI_CMD_RECEIVE_DATA 19 /* INB */
81 #define DIGI_CMD_RECEIVE_DISABLE 20 /* INB */
82 #define DIGI_CMD_GET_PORT_TYPE 21 /* OOB */
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
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
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
121 #define DIGI_STOP_BITS_1 0
122 #define DIGI_STOP_BITS_2 1
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
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
132 #define DIGI_DTR_INACTIVE 0
133 #define DIGI_DTR_ACTIVE 1
134 #define DIGI_DTR_INPUT_FLOW_CONTROL 2
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
141 #define DIGI_FLUSH_TX 1
142 #define DIGI_FLUSH_RX 2
143 #define DIGI_RESUME_TX 4 /* clears xoff condition */
145 #define DIGI_TRANSMIT_NOT_IDLE 0
146 #define DIGI_TRANSMIT_IDLE 1
148 #define DIGI_DISABLE 0
149 #define DIGI_ENABLE 1
151 #define DIGI_DEASSERT 0
152 #define DIGI_ASSERT 1
154 /* in band status codes */
155 #define DIGI_OVERRUN_ERROR 4
156 #define DIGI_PARITY_ERROR 8
157 #define DIGI_FRAMING_ERROR 16
158 #define DIGI_BREAK_ERROR 32
160 /* out of band status */
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
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
181 spinlock_t ds_serial_lock;
182 struct usb_serial_port *ds_oob_port; /* out-of-band port */
183 int ds_oob_port_num; /* index of out-of-band port */
184 int ds_device_started;
188 spinlock_t dp_port_lock;
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;
197 int dp_throttle_restart;
198 wait_queue_head_t dp_flush_wait;
199 wait_queue_head_t dp_close_wait; /* wait queue for close */
200 struct usb_serial_port *dp_port;
204 /* Local Function Declarations */
206 static int digi_write_oob_command(struct usb_serial_port *port,
207 unsigned char *buf, int count, int interruptible);
208 static int digi_write_inb_command(struct usb_serial_port *port,
209 unsigned char *buf, int count, unsigned long timeout);
210 static int digi_set_modem_signals(struct usb_serial_port *port,
211 unsigned int modem_signals, int interruptible);
212 static int digi_transmit_idle(struct usb_serial_port *port,
213 unsigned long timeout);
214 static void digi_rx_throttle(struct tty_struct *tty);
215 static void digi_rx_unthrottle(struct tty_struct *tty);
216 static void digi_set_termios(struct tty_struct *tty,
217 struct usb_serial_port *port, struct ktermios *old_termios);
218 static void digi_break_ctl(struct tty_struct *tty, int break_state);
219 static int digi_tiocmget(struct tty_struct *tty);
220 static int digi_tiocmset(struct tty_struct *tty, unsigned int set,
222 static int digi_write(struct tty_struct *tty, struct usb_serial_port *port,
223 const unsigned char *buf, int count);
224 static void digi_write_bulk_callback(struct urb *urb);
225 static int digi_write_room(struct tty_struct *tty);
226 static int digi_chars_in_buffer(struct tty_struct *tty);
227 static int digi_open(struct tty_struct *tty, struct usb_serial_port *port);
228 static void digi_close(struct usb_serial_port *port);
229 static void digi_dtr_rts(struct usb_serial_port *port, int on);
230 static int digi_startup_device(struct usb_serial *serial);
231 static int digi_startup(struct usb_serial *serial);
232 static void digi_disconnect(struct usb_serial *serial);
233 static void digi_release(struct usb_serial *serial);
234 static int digi_port_probe(struct usb_serial_port *port);
235 static int digi_port_remove(struct usb_serial_port *port);
236 static void digi_read_bulk_callback(struct urb *urb);
237 static int digi_read_inb_callback(struct urb *urb);
238 static int digi_read_oob_callback(struct urb *urb);
241 static const struct usb_device_id id_table_combined[] = {
242 { USB_DEVICE(DIGI_VENDOR_ID, DIGI_2_ID) },
243 { USB_DEVICE(DIGI_VENDOR_ID, DIGI_4_ID) },
244 { } /* Terminating entry */
247 static const struct usb_device_id id_table_2[] = {
248 { USB_DEVICE(DIGI_VENDOR_ID, DIGI_2_ID) },
249 { } /* Terminating entry */
252 static const struct usb_device_id id_table_4[] = {
253 { USB_DEVICE(DIGI_VENDOR_ID, DIGI_4_ID) },
254 { } /* Terminating entry */
257 MODULE_DEVICE_TABLE(usb, id_table_combined);
259 /* device info needed for the Digi serial converter */
261 static struct usb_serial_driver digi_acceleport_2_device = {
263 .owner = THIS_MODULE,
266 .description = "Digi 2 port USB adapter",
267 .id_table = id_table_2,
273 .dtr_rts = digi_dtr_rts,
275 .write_room = digi_write_room,
276 .write_bulk_callback = digi_write_bulk_callback,
277 .read_bulk_callback = digi_read_bulk_callback,
278 .chars_in_buffer = digi_chars_in_buffer,
279 .throttle = digi_rx_throttle,
280 .unthrottle = digi_rx_unthrottle,
281 .set_termios = digi_set_termios,
282 .break_ctl = digi_break_ctl,
283 .tiocmget = digi_tiocmget,
284 .tiocmset = digi_tiocmset,
285 .attach = digi_startup,
286 .disconnect = digi_disconnect,
287 .release = digi_release,
288 .port_probe = digi_port_probe,
289 .port_remove = digi_port_remove,
292 static struct usb_serial_driver digi_acceleport_4_device = {
294 .owner = THIS_MODULE,
297 .description = "Digi 4 port USB adapter",
298 .id_table = id_table_4,
305 .write_room = digi_write_room,
306 .write_bulk_callback = digi_write_bulk_callback,
307 .read_bulk_callback = digi_read_bulk_callback,
308 .chars_in_buffer = digi_chars_in_buffer,
309 .throttle = digi_rx_throttle,
310 .unthrottle = digi_rx_unthrottle,
311 .set_termios = digi_set_termios,
312 .break_ctl = digi_break_ctl,
313 .tiocmget = digi_tiocmget,
314 .tiocmset = digi_tiocmset,
315 .attach = digi_startup,
316 .disconnect = digi_disconnect,
317 .release = digi_release,
318 .port_probe = digi_port_probe,
319 .port_remove = digi_port_remove,
322 static struct usb_serial_driver * const serial_drivers[] = {
323 &digi_acceleport_2_device, &digi_acceleport_4_device, NULL
329 * Cond Wait Interruptible Timeout Irqrestore
331 * Do spin_unlock_irqrestore and interruptible_sleep_on_timeout
332 * so that wake ups are not lost if they occur between the unlock
333 * and the sleep. In other words, spin_unlock_irqrestore and
334 * interruptible_sleep_on_timeout are "atomic" with respect to
335 * wake ups. This is used to implement condition variables.
337 * interruptible_sleep_on_timeout is deprecated and has been replaced
338 * with the equivalent code.
341 static long cond_wait_interruptible_timeout_irqrestore(
342 wait_queue_head_t *q, long timeout,
343 spinlock_t *lock, unsigned long flags)
348 prepare_to_wait(q, &wait, TASK_INTERRUPTIBLE);
349 spin_unlock_irqrestore(lock, flags);
350 timeout = schedule_timeout(timeout);
351 finish_wait(q, &wait);
357 * Digi Write OOB Command
359 * Write commands on the out of band port. Commands are 4
360 * bytes each, multiple commands can be sent at once, and
361 * no command will be split across USB packets. Returns 0
362 * if successful, -EINTR if interrupted while sleeping and
363 * the interruptible flag is true, or a negative error
364 * returned by usb_submit_urb.
367 static int digi_write_oob_command(struct usb_serial_port *port,
368 unsigned char *buf, int count, int interruptible)
372 struct usb_serial_port *oob_port = (struct usb_serial_port *)((struct digi_serial *)(usb_get_serial_data(port->serial)))->ds_oob_port;
373 struct digi_port *oob_priv = usb_get_serial_port_data(oob_port);
374 unsigned long flags = 0;
377 "digi_write_oob_command: TOP: port=%d, count=%d\n",
378 oob_priv->dp_port_num, count);
380 spin_lock_irqsave(&oob_priv->dp_port_lock, flags);
382 while (oob_priv->dp_write_urb_in_use) {
383 cond_wait_interruptible_timeout_irqrestore(
384 &oob_port->write_wait, DIGI_RETRY_TIMEOUT,
385 &oob_priv->dp_port_lock, flags);
386 if (interruptible && signal_pending(current))
388 spin_lock_irqsave(&oob_priv->dp_port_lock, flags);
391 /* len must be a multiple of 4, so commands are not split */
392 len = min(count, oob_port->bulk_out_size);
395 memcpy(oob_port->write_urb->transfer_buffer, buf, len);
396 oob_port->write_urb->transfer_buffer_length = len;
397 ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC);
399 oob_priv->dp_write_urb_in_use = 1;
404 spin_unlock_irqrestore(&oob_priv->dp_port_lock, flags);
406 dev_err(&port->dev, "%s: usb_submit_urb failed, ret=%d\n",
414 * Digi Write In Band Command
416 * Write commands on the given port. Commands are 4
417 * bytes each, multiple commands can be sent at once, and
418 * no command will be split across USB packets. If timeout
419 * is non-zero, write in band command will return after
420 * waiting unsuccessfully for the URB status to clear for
421 * timeout ticks. Returns 0 if successful, or a negative
422 * error returned by digi_write.
425 static int digi_write_inb_command(struct usb_serial_port *port,
426 unsigned char *buf, int count, unsigned long timeout)
430 struct digi_port *priv = usb_get_serial_port_data(port);
431 unsigned char *data = port->write_urb->transfer_buffer;
432 unsigned long flags = 0;
434 dev_dbg(&port->dev, "digi_write_inb_command: TOP: port=%d, count=%d\n",
435 priv->dp_port_num, count);
442 spin_lock_irqsave(&priv->dp_port_lock, flags);
443 while (count > 0 && ret == 0) {
444 while (priv->dp_write_urb_in_use &&
445 time_before(jiffies, timeout)) {
446 cond_wait_interruptible_timeout_irqrestore(
447 &port->write_wait, DIGI_RETRY_TIMEOUT,
448 &priv->dp_port_lock, flags);
449 if (signal_pending(current))
451 spin_lock_irqsave(&priv->dp_port_lock, flags);
454 /* len must be a multiple of 4 and small enough to */
455 /* guarantee the write will send buffered data first, */
456 /* so commands are in order with data and not split */
457 len = min(count, port->bulk_out_size-2-priv->dp_out_buf_len);
461 /* write any buffered data first */
462 if (priv->dp_out_buf_len > 0) {
463 data[0] = DIGI_CMD_SEND_DATA;
464 data[1] = priv->dp_out_buf_len;
465 memcpy(data + 2, priv->dp_out_buf,
466 priv->dp_out_buf_len);
467 memcpy(data + 2 + priv->dp_out_buf_len, buf, len);
468 port->write_urb->transfer_buffer_length
469 = priv->dp_out_buf_len + 2 + len;
471 memcpy(data, buf, len);
472 port->write_urb->transfer_buffer_length = len;
475 ret = usb_submit_urb(port->write_urb, GFP_ATOMIC);
477 priv->dp_write_urb_in_use = 1;
478 priv->dp_out_buf_len = 0;
484 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
488 "%s: usb_submit_urb failed, ret=%d, port=%d\n",
489 __func__, ret, priv->dp_port_num);
495 * Digi Set Modem Signals
497 * Sets or clears DTR and RTS on the port, according to the
498 * modem_signals argument. Use TIOCM_DTR and TIOCM_RTS flags
499 * for the modem_signals argument. Returns 0 if successful,
500 * -EINTR if interrupted while sleeping, or a non-zero error
501 * returned by usb_submit_urb.
504 static int digi_set_modem_signals(struct usb_serial_port *port,
505 unsigned int modem_signals, int interruptible)
509 struct digi_port *port_priv = usb_get_serial_port_data(port);
510 struct usb_serial_port *oob_port = (struct usb_serial_port *) ((struct digi_serial *)(usb_get_serial_data(port->serial)))->ds_oob_port;
511 struct digi_port *oob_priv = usb_get_serial_port_data(oob_port);
512 unsigned char *data = oob_port->write_urb->transfer_buffer;
513 unsigned long flags = 0;
517 "digi_set_modem_signals: TOP: port=%d, modem_signals=0x%x\n",
518 port_priv->dp_port_num, modem_signals);
520 spin_lock_irqsave(&oob_priv->dp_port_lock, flags);
521 spin_lock(&port_priv->dp_port_lock);
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_port->write_wait, DIGI_RETRY_TIMEOUT,
527 &oob_priv->dp_port_lock, flags);
528 if (interruptible && signal_pending(current))
530 spin_lock_irqsave(&oob_priv->dp_port_lock, flags);
531 spin_lock(&port_priv->dp_port_lock);
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;
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;
544 oob_port->write_urb->transfer_buffer_length = 8;
546 ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC);
548 oob_priv->dp_write_urb_in_use = 1;
549 port_priv->dp_modem_signals =
550 (port_priv->dp_modem_signals&~(TIOCM_DTR|TIOCM_RTS))
551 | (modem_signals&(TIOCM_DTR|TIOCM_RTS));
553 spin_unlock(&port_priv->dp_port_lock);
554 spin_unlock_irqrestore(&oob_priv->dp_port_lock, flags);
556 dev_err(&port->dev, "%s: usb_submit_urb failed, ret=%d\n",
564 * Digi transmit idle waits, up to timeout ticks, for the transmitter
565 * to go idle. It returns 0 if successful or a negative error.
567 * There are race conditions here if more than one process is calling
568 * digi_transmit_idle on the same port at the same time. However, this
569 * is only called from close, and only one process can be in close on a
570 * port at a time, so its ok.
573 static int digi_transmit_idle(struct usb_serial_port *port,
574 unsigned long timeout)
577 unsigned char buf[2];
578 struct digi_port *priv = usb_get_serial_port_data(port);
579 unsigned long flags = 0;
581 spin_lock_irqsave(&priv->dp_port_lock, flags);
582 priv->dp_transmit_idle = 0;
583 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
585 buf[0] = DIGI_CMD_TRANSMIT_IDLE;
590 ret = digi_write_inb_command(port, buf, 2, timeout - jiffies);
594 spin_lock_irqsave(&priv->dp_port_lock, flags);
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))
602 spin_lock_irqsave(&priv->dp_port_lock, flags);
604 priv->dp_transmit_idle = 0;
605 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
611 static void digi_rx_throttle(struct tty_struct *tty)
614 struct usb_serial_port *port = tty->driver_data;
615 struct digi_port *priv = usb_get_serial_port_data(port);
617 /* stop receiving characters by not resubmitting the read urb */
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);
625 static void digi_rx_unthrottle(struct tty_struct *tty)
629 struct usb_serial_port *port = tty->driver_data;
630 struct digi_port *priv = usb_get_serial_port_data(port);
632 spin_lock_irqsave(&priv->dp_port_lock, flags);
634 /* restart read chain */
635 if (priv->dp_throttle_restart)
636 ret = usb_submit_urb(port->read_urb, GFP_ATOMIC);
638 /* turn throttle off */
639 priv->dp_throttled = 0;
640 priv->dp_throttle_restart = 0;
642 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
646 "%s: usb_submit_urb failed, ret=%d, port=%d\n",
647 __func__, ret, priv->dp_port_num);
651 static void digi_set_termios(struct tty_struct *tty,
652 struct usb_serial_port *port, struct ktermios *old_termios)
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;
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);
671 baud = tty_get_baud_rate(tty);
672 if (baud != tty_termios_baud_rate(old_termios)) {
675 /* reassert DTR and (maybe) RTS on transition from B0 */
676 if ((old_cflag & CBAUD) == B0) {
677 /* don't set RTS if using hardware flow control */
678 /* and throttling input */
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);
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;
966 int status = urb->status;
969 /* port and serial sanity check */
970 if (port == NULL || (priv = usb_get_serial_port_data(port)) == NULL) {
971 pr_err("%s: port or port->private is NULL, status=%d\n",
975 serial = port->serial;
976 if (serial == NULL || (serial_priv = usb_get_serial_data(serial)) == NULL) {
978 "%s: serial or serial->private is NULL, status=%d\n",
983 /* handle oob callback */
984 if (priv->dp_port_num == serial_priv->ds_oob_port_num) {
985 dev_dbg(&port->dev, "digi_write_bulk_callback: oob callback\n");
986 spin_lock_irqsave(&priv->dp_port_lock, flags);
987 priv->dp_write_urb_in_use = 0;
988 wake_up_interruptible(&port->write_wait);
989 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
993 /* try to send any buffered data on this port */
995 spin_lock_irqsave(&priv->dp_port_lock, flags);
996 priv->dp_write_urb_in_use = 0;
997 if (priv->dp_out_buf_len > 0) {
998 *((unsigned char *)(port->write_urb->transfer_buffer))
999 = (unsigned char)DIGI_CMD_SEND_DATA;
1000 *((unsigned char *)(port->write_urb->transfer_buffer) + 1)
1001 = (unsigned char)priv->dp_out_buf_len;
1002 port->write_urb->transfer_buffer_length =
1003 priv->dp_out_buf_len + 2;
1004 memcpy(port->write_urb->transfer_buffer + 2, priv->dp_out_buf,
1005 priv->dp_out_buf_len);
1006 ret = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1008 priv->dp_write_urb_in_use = 1;
1009 priv->dp_out_buf_len = 0;
1013 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
1015 if (ret && ret != -EPERM)
1016 dev_err_console(port,
1017 "%s: usb_submit_urb failed, ret=%d, port=%d\n",
1018 __func__, ret, priv->dp_port_num);
1021 tty_port_tty_wakeup(&port->port);
1024 static int digi_write_room(struct tty_struct *tty)
1026 struct usb_serial_port *port = tty->driver_data;
1027 struct digi_port *priv = usb_get_serial_port_data(port);
1029 unsigned long flags = 0;
1031 spin_lock_irqsave(&priv->dp_port_lock, flags);
1033 if (priv->dp_write_urb_in_use)
1036 room = port->bulk_out_size - 2 - priv->dp_out_buf_len;
1038 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
1039 dev_dbg(&port->dev, "digi_write_room: port=%d, room=%d\n", priv->dp_port_num, room);
1044 static int digi_chars_in_buffer(struct tty_struct *tty)
1046 struct usb_serial_port *port = tty->driver_data;
1047 struct digi_port *priv = usb_get_serial_port_data(port);
1049 if (priv->dp_write_urb_in_use) {
1050 dev_dbg(&port->dev, "digi_chars_in_buffer: port=%d, chars=%d\n",
1051 priv->dp_port_num, port->bulk_out_size - 2);
1052 /* return(port->bulk_out_size - 2); */
1055 dev_dbg(&port->dev, "digi_chars_in_buffer: port=%d, chars=%d\n",
1056 priv->dp_port_num, priv->dp_out_buf_len);
1057 return priv->dp_out_buf_len;
1062 static void digi_dtr_rts(struct usb_serial_port *port, int on)
1064 /* Adjust DTR and RTS */
1065 digi_set_modem_signals(port, on * (TIOCM_DTR|TIOCM_RTS), 1);
1068 static int digi_open(struct tty_struct *tty, struct usb_serial_port *port)
1071 unsigned char buf[32];
1072 struct digi_port *priv = usb_get_serial_port_data(port);
1073 struct ktermios not_termios;
1075 /* be sure the device is started up */
1076 if (digi_startup_device(port->serial) != 0)
1079 /* read modem signals automatically whenever they change */
1080 buf[0] = DIGI_CMD_READ_INPUT_SIGNALS;
1081 buf[1] = priv->dp_port_num;
1082 buf[2] = DIGI_ENABLE;
1086 buf[4] = DIGI_CMD_IFLUSH_FIFO;
1087 buf[5] = priv->dp_port_num;
1088 buf[6] = DIGI_FLUSH_TX | DIGI_FLUSH_RX;
1091 ret = digi_write_oob_command(port, buf, 8, 1);
1093 dev_dbg(&port->dev, "digi_open: write oob failed, ret=%d\n", ret);
1095 /* set termios settings */
1097 not_termios.c_cflag = ~tty->termios.c_cflag;
1098 not_termios.c_iflag = ~tty->termios.c_iflag;
1099 digi_set_termios(tty, port, ¬_termios);
1105 static void digi_close(struct usb_serial_port *port)
1109 unsigned char buf[32];
1110 struct digi_port *priv = usb_get_serial_port_data(port);
1112 mutex_lock(&port->serial->disc_mutex);
1113 /* if disconnected, just clear flags */
1114 if (port->serial->disconnected)
1117 /* FIXME: Transmit idle belongs in the wait_unti_sent path */
1118 digi_transmit_idle(port, DIGI_CLOSE_TIMEOUT);
1120 /* disable input flow control */
1121 buf[0] = DIGI_CMD_SET_INPUT_FLOW_CONTROL;
1122 buf[1] = priv->dp_port_num;
1123 buf[2] = DIGI_DISABLE;
1126 /* disable output flow control */
1127 buf[4] = DIGI_CMD_SET_OUTPUT_FLOW_CONTROL;
1128 buf[5] = priv->dp_port_num;
1129 buf[6] = DIGI_DISABLE;
1132 /* disable reading modem signals automatically */
1133 buf[8] = DIGI_CMD_READ_INPUT_SIGNALS;
1134 buf[9] = priv->dp_port_num;
1135 buf[10] = DIGI_DISABLE;
1138 /* disable receive */
1139 buf[12] = DIGI_CMD_RECEIVE_ENABLE;
1140 buf[13] = priv->dp_port_num;
1141 buf[14] = DIGI_DISABLE;
1145 buf[16] = DIGI_CMD_IFLUSH_FIFO;
1146 buf[17] = priv->dp_port_num;
1147 buf[18] = DIGI_FLUSH_TX | DIGI_FLUSH_RX;
1150 ret = digi_write_oob_command(port, buf, 20, 0);
1152 dev_dbg(&port->dev, "digi_close: write oob failed, ret=%d\n",
1154 /* wait for final commands on oob port to complete */
1155 prepare_to_wait(&priv->dp_flush_wait, &wait,
1156 TASK_INTERRUPTIBLE);
1157 schedule_timeout(DIGI_CLOSE_TIMEOUT);
1158 finish_wait(&priv->dp_flush_wait, &wait);
1160 /* shutdown any outstanding bulk writes */
1161 usb_kill_urb(port->write_urb);
1163 spin_lock_irq(&priv->dp_port_lock);
1164 priv->dp_write_urb_in_use = 0;
1165 wake_up_interruptible(&priv->dp_close_wait);
1166 spin_unlock_irq(&priv->dp_port_lock);
1167 mutex_unlock(&port->serial->disc_mutex);
1172 * Digi Startup Device
1174 * Starts reads on all ports. Must be called AFTER startup, with
1175 * urbs initialized. Returns 0 if successful, non-zero error otherwise.
1178 static int digi_startup_device(struct usb_serial *serial)
1181 struct digi_serial *serial_priv = usb_get_serial_data(serial);
1182 struct usb_serial_port *port;
1184 /* be sure this happens exactly once */
1185 spin_lock(&serial_priv->ds_serial_lock);
1186 if (serial_priv->ds_device_started) {
1187 spin_unlock(&serial_priv->ds_serial_lock);
1190 serial_priv->ds_device_started = 1;
1191 spin_unlock(&serial_priv->ds_serial_lock);
1193 /* start reading from each bulk in endpoint for the device */
1194 /* set USB_DISABLE_SPD flag for write bulk urbs */
1195 for (i = 0; i < serial->type->num_ports + 1; i++) {
1196 port = serial->port[i];
1197 ret = usb_submit_urb(port->read_urb, GFP_KERNEL);
1200 "%s: usb_submit_urb failed, ret=%d, port=%d\n",
1208 static int digi_port_init(struct usb_serial_port *port, unsigned port_num)
1210 struct digi_port *priv;
1212 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1216 spin_lock_init(&priv->dp_port_lock);
1217 priv->dp_port_num = port_num;
1218 init_waitqueue_head(&priv->dp_transmit_idle_wait);
1219 init_waitqueue_head(&priv->dp_flush_wait);
1220 init_waitqueue_head(&priv->dp_close_wait);
1221 priv->dp_port = port;
1223 init_waitqueue_head(&port->write_wait);
1225 usb_set_serial_port_data(port, priv);
1230 static int digi_startup(struct usb_serial *serial)
1232 struct digi_serial *serial_priv;
1235 serial_priv = kzalloc(sizeof(*serial_priv), GFP_KERNEL);
1239 spin_lock_init(&serial_priv->ds_serial_lock);
1240 serial_priv->ds_oob_port_num = serial->type->num_ports;
1241 serial_priv->ds_oob_port = serial->port[serial_priv->ds_oob_port_num];
1243 ret = digi_port_init(serial_priv->ds_oob_port,
1244 serial_priv->ds_oob_port_num);
1250 usb_set_serial_data(serial, serial_priv);
1256 static void digi_disconnect(struct usb_serial *serial)
1260 /* stop reads and writes on all ports */
1261 for (i = 0; i < serial->type->num_ports + 1; i++) {
1262 usb_kill_urb(serial->port[i]->read_urb);
1263 usb_kill_urb(serial->port[i]->write_urb);
1268 static void digi_release(struct usb_serial *serial)
1270 struct digi_serial *serial_priv;
1271 struct digi_port *priv;
1273 serial_priv = usb_get_serial_data(serial);
1275 priv = usb_get_serial_port_data(serial_priv->ds_oob_port);
1281 static int digi_port_probe(struct usb_serial_port *port)
1283 return digi_port_init(port, port->port_number);
1286 static int digi_port_remove(struct usb_serial_port *port)
1288 struct digi_port *priv;
1290 priv = usb_get_serial_port_data(port);
1296 static void digi_read_bulk_callback(struct urb *urb)
1298 struct usb_serial_port *port = urb->context;
1299 struct digi_port *priv;
1300 struct digi_serial *serial_priv;
1302 int status = urb->status;
1304 /* port sanity check, do not resubmit if port is not valid */
1307 priv = usb_get_serial_port_data(port);
1309 dev_err(&port->dev, "%s: port->private is NULL, status=%d\n",
1313 if (port->serial == NULL ||
1314 (serial_priv = usb_get_serial_data(port->serial)) == NULL) {
1315 dev_err(&port->dev, "%s: serial is bad or serial->private "
1316 "is NULL, status=%d\n", __func__, status);
1320 /* do not resubmit urb if it has any status error */
1323 "%s: nonzero read bulk status: status=%d, port=%d\n",
1324 __func__, status, priv->dp_port_num);
1328 /* handle oob or inb callback, do not resubmit if error */
1329 if (priv->dp_port_num == serial_priv->ds_oob_port_num) {
1330 if (digi_read_oob_callback(urb) != 0)
1333 if (digi_read_inb_callback(urb) != 0)
1338 ret = usb_submit_urb(urb, GFP_ATOMIC);
1339 if (ret != 0 && ret != -EPERM) {
1341 "%s: failed resubmitting urb, ret=%d, port=%d\n",
1342 __func__, ret, priv->dp_port_num);
1348 * Digi Read INB Callback
1350 * Digi Read INB Callback handles reads on the in band ports, sending
1351 * the data on to the tty subsystem. When called we know port and
1352 * port->private are not NULL and port->serial has been validated.
1353 * It returns 0 if successful, 1 if successful but the port is
1354 * throttled, and -1 if the sanity checks failed.
1357 static int digi_read_inb_callback(struct urb *urb)
1359 struct usb_serial_port *port = urb->context;
1360 struct digi_port *priv = usb_get_serial_port_data(port);
1361 unsigned char *buf = urb->transfer_buffer;
1362 unsigned long flags;
1366 unsigned char *data;
1367 int tty_flag, throttled;
1369 /* short/multiple packet check */
1370 if (urb->actual_length < 2) {
1371 dev_warn(&port->dev, "short packet received\n");
1378 if (urb->actual_length != len + 2) {
1379 dev_err(&port->dev, "malformed packet received: port=%d, opcode=%d, len=%d, actual_length=%u\n",
1380 priv->dp_port_num, opcode, len, urb->actual_length);
1384 if (opcode == DIGI_CMD_RECEIVE_DATA && len < 1) {
1385 dev_err(&port->dev, "malformed data packet received\n");
1389 spin_lock_irqsave(&priv->dp_port_lock, flags);
1391 /* check for throttle; if set, do not resubmit read urb */
1392 /* indicate the read chain needs to be restarted on unthrottle */
1393 throttled = priv->dp_throttled;
1395 priv->dp_throttle_restart = 1;
1398 if (opcode == DIGI_CMD_RECEIVE_DATA) {
1399 port_status = buf[2];
1402 /* get flag from port_status */
1405 /* overrun is special, not associated with a char */
1406 if (port_status & DIGI_OVERRUN_ERROR)
1407 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
1409 /* break takes precedence over parity, */
1410 /* which takes precedence over framing errors */
1411 if (port_status & DIGI_BREAK_ERROR)
1412 tty_flag = TTY_BREAK;
1413 else if (port_status & DIGI_PARITY_ERROR)
1414 tty_flag = TTY_PARITY;
1415 else if (port_status & DIGI_FRAMING_ERROR)
1416 tty_flag = TTY_FRAME;
1418 /* data length is len-1 (one byte of len is port_status) */
1421 tty_insert_flip_string_fixed_flag(&port->port, data,
1423 tty_flip_buffer_push(&port->port);
1426 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
1428 if (opcode == DIGI_CMD_RECEIVE_DISABLE)
1429 dev_dbg(&port->dev, "%s: got RECEIVE_DISABLE\n", __func__);
1430 else if (opcode != DIGI_CMD_RECEIVE_DATA)
1431 dev_dbg(&port->dev, "%s: unknown opcode: %d\n", __func__, opcode);
1433 return throttled ? 1 : 0;
1439 * Digi Read OOB Callback
1441 * Digi Read OOB Callback handles reads on the out of band port.
1442 * When called we know port and port->private are not NULL and
1443 * the port->serial is valid. It returns 0 if successful, and
1444 * -1 if the sanity checks failed.
1447 static int digi_read_oob_callback(struct urb *urb)
1450 struct usb_serial_port *port = urb->context;
1451 struct usb_serial *serial = port->serial;
1452 struct tty_struct *tty;
1453 struct digi_port *priv = usb_get_serial_port_data(port);
1454 unsigned char *buf = urb->transfer_buffer;
1455 int opcode, line, status, val;
1456 unsigned long flags;
1460 if (urb->actual_length < 4)
1463 /* handle each oob command */
1464 for (i = 0; i < urb->actual_length - 3; i += 4) {
1467 status = buf[i + 2];
1470 dev_dbg(&port->dev, "digi_read_oob_callback: opcode=%d, line=%d, status=%d, val=%d\n",
1471 opcode, line, status, val);
1473 if (status != 0 || line >= serial->type->num_ports)
1476 port = serial->port[line];
1478 priv = usb_get_serial_port_data(port);
1482 tty = tty_port_tty_get(&port->port);
1486 rts = C_CRTSCTS(tty);
1488 if (tty && opcode == DIGI_CMD_READ_INPUT_SIGNALS) {
1489 bool wakeup = false;
1491 spin_lock_irqsave(&priv->dp_port_lock, flags);
1492 /* convert from digi flags to termiox flags */
1493 if (val & DIGI_READ_INPUT_SIGNALS_CTS) {
1494 priv->dp_modem_signals |= TIOCM_CTS;
1498 priv->dp_modem_signals &= ~TIOCM_CTS;
1499 /* port must be open to use tty struct */
1501 if (val & DIGI_READ_INPUT_SIGNALS_DSR)
1502 priv->dp_modem_signals |= TIOCM_DSR;
1504 priv->dp_modem_signals &= ~TIOCM_DSR;
1505 if (val & DIGI_READ_INPUT_SIGNALS_RI)
1506 priv->dp_modem_signals |= TIOCM_RI;
1508 priv->dp_modem_signals &= ~TIOCM_RI;
1509 if (val & DIGI_READ_INPUT_SIGNALS_DCD)
1510 priv->dp_modem_signals |= TIOCM_CD;
1512 priv->dp_modem_signals &= ~TIOCM_CD;
1514 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
1517 tty_port_tty_wakeup(&port->port);
1518 } else if (opcode == DIGI_CMD_TRANSMIT_IDLE) {
1519 spin_lock_irqsave(&priv->dp_port_lock, flags);
1520 priv->dp_transmit_idle = 1;
1521 wake_up_interruptible(&priv->dp_transmit_idle_wait);
1522 spin_unlock_irqrestore(&priv->dp_port_lock, flags);
1523 } else if (opcode == DIGI_CMD_IFLUSH_FIFO) {
1524 wake_up_interruptible(&priv->dp_flush_wait);
1532 module_usb_serial_driver(serial_drivers, id_table_combined);
1534 MODULE_AUTHOR(DRIVER_AUTHOR);
1535 MODULE_DESCRIPTION(DRIVER_DESC);
1536 MODULE_LICENSE("GPL");