2 * usb-serial driver for Quatech USB 2 devices
4 * Copyright (C) 2012 Bill Pemberton (wfp5p@virginia.edu)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License version 2
8 * as published by the Free Software Foundation.
11 * These devices all have only 1 bulk in and 1 bulk out that is shared
12 * for all serial ports.
16 #include <asm/unaligned.h>
17 #include <linux/errno.h>
18 #include <linux/init.h>
19 #include <linux/slab.h>
20 #include <linux/tty.h>
21 #include <linux/tty_driver.h>
22 #include <linux/tty_flip.h>
23 #include <linux/module.h>
24 #include <linux/serial.h>
25 #include <linux/usb.h>
26 #include <linux/usb/serial.h>
27 #include <linux/serial_reg.h>
28 #include <linux/uaccess.h>
30 /* default urb timeout for usb operations */
31 #define QT2_USB_TIMEOUT USB_CTRL_SET_TIMEOUT
33 #define QT_OPEN_CLOSE_CHANNEL 0xca
34 #define QT_SET_GET_DEVICE 0xc2
35 #define QT_SET_GET_REGISTER 0xc0
36 #define QT_GET_SET_PREBUF_TRIG_LVL 0xcc
37 #define QT_SET_ATF 0xcd
38 #define QT_TRANSFER_IN 0xc0
39 #define QT_HW_FLOW_CONTROL_MASK 0xc5
40 #define QT_SW_FLOW_CONTROL_MASK 0xc6
41 #define QT2_BREAK_CONTROL 0xc8
42 #define QT2_GET_SET_UART 0xc1
43 #define QT2_FLUSH_DEVICE 0xc4
44 #define QT2_GET_SET_QMCR 0xe1
45 #define QT2_QMCR_RS232 0x40
46 #define QT2_QMCR_RS422 0x10
48 #define SERIAL_CRTSCTS ((UART_MCR_RTS << 8) | UART_MSR_CTS)
50 #define SERIAL_EVEN_PARITY (UART_LCR_PARITY | UART_LCR_EPAR)
52 /* status bytes for the device */
53 #define QT2_CONTROL_BYTE 0x1b
54 #define QT2_LINE_STATUS 0x00 /* following 1 byte is line status */
55 #define QT2_MODEM_STATUS 0x01 /* following 1 byte is modem status */
56 #define QT2_XMIT_HOLD 0x02 /* following 2 bytes are ?? */
57 #define QT2_CHANGE_PORT 0x03 /* following 1 byte is port to change to */
58 #define QT2_REC_FLUSH 0x04 /* no following info */
59 #define QT2_XMIT_FLUSH 0x05 /* no following info */
60 #define QT2_CONTROL_ESCAPE 0xff /* pass through previous 2 control bytes */
62 #define MAX_BAUD_RATE 921600
63 #define DEFAULT_BAUD_RATE 9600
65 #define QT2_WRITE_BUFFER_SIZE 512 /* size of write buffer */
66 #define QT2_WRITE_CONTROL_SIZE 5 /* control bytes used for a write */
68 #define DRIVER_DESC "Quatech 2nd gen USB to Serial Driver"
70 #define USB_VENDOR_ID_QUATECH 0x061d
71 #define QUATECH_SSU2_100 0xC120 /* RS232 single port */
72 #define QUATECH_DSU2_100 0xC140 /* RS232 dual port */
73 #define QUATECH_DSU2_400 0xC150 /* RS232/422/485 dual port */
74 #define QUATECH_QSU2_100 0xC160 /* RS232 four port */
75 #define QUATECH_QSU2_400 0xC170 /* RS232/422/485 four port */
76 #define QUATECH_ESU2_100 0xC1A0 /* RS232 eight port */
77 #define QUATECH_ESU2_400 0xC180 /* RS232/422/485 eight port */
79 struct qt2_device_detail {
84 #define QT_DETAILS(prod, ports) \
85 .product_id = (prod), \
88 static const struct qt2_device_detail qt2_device_details[] = {
89 {QT_DETAILS(QUATECH_SSU2_100, 1)},
90 {QT_DETAILS(QUATECH_DSU2_400, 2)},
91 {QT_DETAILS(QUATECH_DSU2_100, 2)},
92 {QT_DETAILS(QUATECH_QSU2_400, 4)},
93 {QT_DETAILS(QUATECH_QSU2_100, 4)},
94 {QT_DETAILS(QUATECH_ESU2_400, 8)},
95 {QT_DETAILS(QUATECH_ESU2_100, 8)},
96 {QT_DETAILS(0, 0)} /* Terminating entry */
99 static const struct usb_device_id id_table[] = {
100 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU2_100)},
101 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU2_100)},
102 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU2_400)},
103 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU2_100)},
104 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU2_400)},
105 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU2_100)},
106 {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU2_400)},
107 {} /* Terminating entry */
109 MODULE_DEVICE_TABLE(usb, id_table);
111 struct qt2_serial_private {
112 unsigned char current_port; /* current port for incoming data */
114 struct urb *read_urb; /* shared among all ports */
115 char read_buffer[512];
118 struct qt2_port_private {
124 struct urb *write_urb;
125 char write_buffer[QT2_WRITE_BUFFER_SIZE];
131 struct async_icount icount;
133 struct usb_serial_port *port;
136 static void qt2_update_lsr(struct usb_serial_port *port, unsigned char *ch);
137 static void qt2_update_msr(struct usb_serial_port *port, unsigned char *ch);
138 static void qt2_write_bulk_callback(struct urb *urb);
139 static void qt2_read_bulk_callback(struct urb *urb);
141 static void qt2_release(struct usb_serial *serial)
143 struct qt2_serial_private *serial_priv;
145 serial_priv = usb_get_serial_data(serial);
147 usb_free_urb(serial_priv->read_urb);
151 static inline int calc_baud_divisor(int baudrate)
155 divisor = MAX_BAUD_RATE / baudrate;
156 rem = MAX_BAUD_RATE % baudrate;
157 /* Round to nearest divisor */
158 if (((rem * 2) >= baudrate) && (baudrate != 110))
164 static inline int qt2_set_port_config(struct usb_device *dev,
165 unsigned char port_number,
166 u16 baudrate, u16 lcr)
168 int divisor = calc_baud_divisor(baudrate);
169 u16 index = ((u16) (lcr << 8) | (u16) (port_number));
171 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
172 QT2_GET_SET_UART, 0x40,
173 divisor, index, NULL, 0, QT2_USB_TIMEOUT);
176 static inline int qt2_control_msg(struct usb_device *dev,
177 u8 request, u16 data, u16 index)
179 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
180 request, 0x40, data, index,
181 NULL, 0, QT2_USB_TIMEOUT);
184 static inline int qt2_setdevice(struct usb_device *dev, u8 *data)
186 u16 x = ((u16) (data[1] << 8) | (u16) (data[0]));
188 return qt2_control_msg(dev, QT_SET_GET_DEVICE, x, 0);
192 static inline int qt2_getdevice(struct usb_device *dev, u8 *data)
194 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
195 QT_SET_GET_DEVICE, 0xc0, 0, 0,
196 data, 3, QT2_USB_TIMEOUT);
199 static inline int qt2_getregister(struct usb_device *dev,
204 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
205 QT_SET_GET_REGISTER, 0xc0, reg,
206 uart, data, sizeof(*data), QT2_USB_TIMEOUT);
210 static inline int qt2_setregister(struct usb_device *dev,
211 u8 uart, u8 reg, u16 data)
213 u16 value = (data << 8) | reg;
215 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
216 QT_SET_GET_REGISTER, 0x40, value, uart,
217 NULL, 0, QT2_USB_TIMEOUT);
220 static inline int update_mctrl(struct qt2_port_private *port_priv,
221 unsigned int set, unsigned int clear)
223 struct usb_serial_port *port = port_priv->port;
224 struct usb_device *dev = port->serial->dev;
228 if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) {
230 "update_mctrl - DTR|RTS not being set|cleared\n");
231 return 0; /* no change */
234 clear &= ~set; /* 'set' takes precedence over 'clear' */
237 urb_value |= UART_MCR_DTR;
239 urb_value |= UART_MCR_RTS;
241 status = qt2_setregister(dev, port_priv->device_port, UART_MCR,
245 "update_mctrl - Error from MODEM_CTRL urb: %i\n",
250 static int qt2_calc_num_ports(struct usb_serial *serial)
252 struct qt2_device_detail d;
255 for (i = 0; d = qt2_device_details[i], d.product_id != 0; i++) {
256 if (d.product_id == le16_to_cpu(serial->dev->descriptor.idProduct))
260 /* we didn't recognize the device */
261 dev_err(&serial->dev->dev,
262 "don't know the number of ports, assuming 1\n");
267 static void qt2_set_termios(struct tty_struct *tty,
268 struct usb_serial_port *port,
269 struct ktermios *old_termios)
271 struct usb_device *dev = port->serial->dev;
272 struct qt2_port_private *port_priv;
273 struct ktermios *termios = &tty->termios;
275 unsigned int cflag = termios->c_cflag;
279 port_priv = usb_get_serial_port_data(port);
281 if (cflag & PARENB) {
283 new_lcr |= UART_LCR_PARITY;
285 new_lcr |= SERIAL_EVEN_PARITY;
288 switch (cflag & CSIZE) {
290 new_lcr |= UART_LCR_WLEN5;
293 new_lcr |= UART_LCR_WLEN6;
296 new_lcr |= UART_LCR_WLEN7;
300 new_lcr |= UART_LCR_WLEN8;
304 baud = tty_get_baud_rate(tty);
308 status = qt2_set_port_config(dev, port_priv->device_port, baud,
311 dev_err(&port->dev, "%s - qt2_set_port_config failed: %i\n",
315 status = qt2_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
317 port_priv->device_port);
319 status = qt2_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
320 0, port_priv->device_port);
322 dev_err(&port->dev, "%s - set HW flow control failed: %i\n",
325 if (I_IXOFF(tty) || I_IXON(tty)) {
326 u16 x = ((u16) (START_CHAR(tty) << 8) | (u16) (STOP_CHAR(tty)));
328 status = qt2_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
329 x, port_priv->device_port);
331 status = qt2_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
332 0, port_priv->device_port);
335 dev_err(&port->dev, "%s - set SW flow control failed: %i\n",
340 static int qt2_open(struct tty_struct *tty, struct usb_serial_port *port)
342 struct usb_serial *serial;
343 struct qt2_port_private *port_priv;
349 device_port = (u16) (port->number - port->serial->minor);
351 serial = port->serial;
353 port_priv = usb_get_serial_port_data(port);
355 /* set the port to RS232 mode */
356 status = qt2_control_msg(serial->dev, QT2_GET_SET_QMCR,
357 QT2_QMCR_RS232, device_port);
360 "%s failed to set RS232 mode for port %i error %i\n",
361 __func__, device_port, status);
365 data = kzalloc(2, GFP_KERNEL);
370 status = usb_control_msg(serial->dev,
371 usb_rcvctrlpipe(serial->dev, 0),
372 QT_OPEN_CLOSE_CHANNEL,
374 device_port, data, 2, QT2_USB_TIMEOUT);
377 dev_err(&port->dev, "%s - open port failed %i", __func__,
383 spin_lock_irqsave(&port_priv->lock, flags);
384 port_priv->shadowLSR = data[0];
385 port_priv->shadowMSR = data[1];
386 spin_unlock_irqrestore(&port_priv->lock, flags);
390 /* set to default speed and 8bit word size */
391 status = qt2_set_port_config(serial->dev, device_port,
392 DEFAULT_BAUD_RATE, UART_LCR_WLEN8);
395 "%s - initial setup failed for port %i (%i)\n",
396 __func__, port->number, device_port);
400 port_priv->is_open = true;
401 port_priv->device_port = (u8) device_port;
404 qt2_set_termios(tty, port, &tty->termios);
410 static void qt2_close(struct usb_serial_port *port)
412 struct usb_serial *serial;
413 struct qt2_port_private *port_priv;
417 serial = port->serial;
418 port_priv = usb_get_serial_port_data(port);
420 port_priv->is_open = false;
422 spin_lock_irqsave(&port_priv->urb_lock, flags);
423 usb_kill_urb(port_priv->write_urb);
424 port_priv->urb_in_use = false;
425 spin_unlock_irqrestore(&port_priv->urb_lock, flags);
427 mutex_lock(&port->serial->disc_mutex);
428 if (port->serial->disconnected) {
429 mutex_unlock(&port->serial->disc_mutex);
433 /* flush the port transmit buffer */
434 i = usb_control_msg(serial->dev,
435 usb_rcvctrlpipe(serial->dev, 0),
436 QT2_FLUSH_DEVICE, 0x40, 1,
437 port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT);
440 dev_err(&port->dev, "%s - transmit buffer flush failed: %i\n",
443 /* flush the port receive buffer */
444 i = usb_control_msg(serial->dev,
445 usb_rcvctrlpipe(serial->dev, 0),
446 QT2_FLUSH_DEVICE, 0x40, 0,
447 port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT);
450 dev_err(&port->dev, "%s - receive buffer flush failed: %i\n",
454 i = usb_control_msg(serial->dev,
455 usb_sndctrlpipe(serial->dev, 0),
456 QT_OPEN_CLOSE_CHANNEL,
458 port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT);
461 dev_err(&port->dev, "%s - close port failed %i\n",
464 mutex_unlock(&port->serial->disc_mutex);
467 static void qt2_disconnect(struct usb_serial *serial)
469 struct qt2_serial_private *serial_priv = usb_get_serial_data(serial);
471 usb_kill_urb(serial_priv->read_urb);
474 static int get_serial_info(struct usb_serial_port *port,
475 struct serial_struct __user *retinfo)
477 struct serial_struct tmp;
482 memset(&tmp, 0, sizeof(tmp));
483 tmp.line = port->serial->minor;
486 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
487 tmp.xmit_fifo_size = port->bulk_out_size;
488 tmp.baud_base = 9600;
489 tmp.close_delay = 5*HZ;
490 tmp.closing_wait = 30*HZ;
492 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
497 static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
499 struct qt2_port_private *priv = usb_get_serial_port_data(port);
500 struct async_icount prev, cur;
503 spin_lock_irqsave(&priv->lock, flags);
505 spin_unlock_irqrestore(&priv->lock, flags);
508 wait_event_interruptible(port->delta_msr_wait,
509 (port->serial->disconnected ||
510 (priv->icount.rng != prev.rng) ||
511 (priv->icount.dsr != prev.dsr) ||
512 (priv->icount.dcd != prev.dcd) ||
513 (priv->icount.cts != prev.cts)));
515 if (signal_pending(current))
518 if (port->serial->disconnected)
521 spin_lock_irqsave(&priv->lock, flags);
523 spin_unlock_irqrestore(&priv->lock, flags);
525 if ((prev.rng == cur.rng) &&
526 (prev.dsr == cur.dsr) &&
527 (prev.dcd == cur.dcd) &&
528 (prev.cts == cur.cts))
531 if ((arg & TIOCM_RNG && (prev.rng != cur.rng)) ||
532 (arg & TIOCM_DSR && (prev.dsr != cur.dsr)) ||
533 (arg & TIOCM_CD && (prev.dcd != cur.dcd)) ||
534 (arg & TIOCM_CTS && (prev.cts != cur.cts)))
540 static int qt2_get_icount(struct tty_struct *tty,
541 struct serial_icounter_struct *icount)
543 struct usb_serial_port *port = tty->driver_data;
544 struct qt2_port_private *priv = usb_get_serial_port_data(port);
545 struct async_icount cnow = priv->icount;
547 icount->cts = cnow.cts;
548 icount->dsr = cnow.dsr;
549 icount->rng = cnow.rng;
550 icount->dcd = cnow.dcd;
551 icount->rx = cnow.rx;
552 icount->tx = cnow.tx;
553 icount->frame = cnow.frame;
554 icount->overrun = cnow.overrun;
555 icount->parity = cnow.parity;
556 icount->brk = cnow.brk;
557 icount->buf_overrun = cnow.buf_overrun;
562 static int qt2_ioctl(struct tty_struct *tty,
563 unsigned int cmd, unsigned long arg)
565 struct usb_serial_port *port = tty->driver_data;
569 return get_serial_info(port,
570 (struct serial_struct __user *)arg);
573 return wait_modem_info(port, arg);
582 static void qt2_process_status(struct usb_serial_port *port, unsigned char *ch)
585 case QT2_LINE_STATUS:
586 qt2_update_lsr(port, ch + 1);
588 case QT2_MODEM_STATUS:
589 qt2_update_msr(port, ch + 1);
594 /* not needed, kept to document functionality */
595 static void qt2_process_xmit_empty(struct usb_serial_port *port,
600 bytes_written = (int)(*ch) + (int)(*(ch + 1) << 4);
603 /* not needed, kept to document functionality */
604 static void qt2_process_flush(struct usb_serial_port *port, unsigned char *ch)
609 void qt2_process_read_urb(struct urb *urb)
611 struct usb_serial *serial;
612 struct qt2_serial_private *serial_priv;
613 struct usb_serial_port *port;
614 struct qt2_port_private *port_priv;
618 unsigned char newport;
619 int len = urb->actual_length;
624 ch = urb->transfer_buffer;
625 serial = urb->context;
626 serial_priv = usb_get_serial_data(serial);
627 port = serial->port[serial_priv->current_port];
628 port_priv = usb_get_serial_port_data(port);
630 for (i = 0; i < urb->actual_length; i++) {
631 ch = (unsigned char *)urb->transfer_buffer + i;
632 if ((i <= (len - 3)) &&
633 (*ch == QT2_CONTROL_BYTE) &&
634 (*(ch + 1) == QT2_CONTROL_BYTE)) {
637 case QT2_LINE_STATUS:
638 case QT2_MODEM_STATUS:
641 "%s - status message too short\n",
645 qt2_process_status(port, ch + 2);
652 "%s - xmit_empty message too short\n",
656 qt2_process_xmit_empty(port, ch + 3);
660 case QT2_CHANGE_PORT:
663 "%s - change_port message too short\n",
667 tty_flip_buffer_push(&port->port);
671 if (newport > serial->num_ports) {
673 "%s - port change to invalid port: %i\n",
678 serial_priv->current_port = newport;
679 port = serial->port[serial_priv->current_port];
680 port_priv = usb_get_serial_port_data(port);
686 qt2_process_flush(port, ch + 2);
690 case QT2_CONTROL_ESCAPE:
691 tty_buffer_request_room(&port->port, 2);
692 tty_insert_flip_string(&port->port, ch, 2);
698 "%s - unsupported command %i\n",
699 __func__, *(ch + 2));
706 tty_buffer_request_room(&port->port, 1);
707 tty_insert_flip_string(&port->port, ch, 1);
710 tty_flip_buffer_push(&port->port);
713 static void qt2_write_bulk_callback(struct urb *urb)
715 struct usb_serial_port *port;
716 struct qt2_port_private *port_priv;
719 port_priv = usb_get_serial_port_data(port);
721 spin_lock(&port_priv->urb_lock);
723 port_priv->urb_in_use = false;
724 usb_serial_port_softint(port);
726 spin_unlock(&port_priv->urb_lock);
730 static void qt2_read_bulk_callback(struct urb *urb)
732 struct usb_serial *serial = urb->context;
736 dev_warn(&serial->dev->dev,
737 "%s - non-zero urb status: %i\n", __func__,
742 qt2_process_read_urb(urb);
744 status = usb_submit_urb(urb, GFP_ATOMIC);
746 dev_err(&serial->dev->dev,
747 "%s - resubmit read urb failed: %i\n",
751 static int qt2_setup_urbs(struct usb_serial *serial)
753 struct usb_serial_port *port0;
754 struct qt2_serial_private *serial_priv;
757 port0 = serial->port[0];
759 serial_priv = usb_get_serial_data(serial);
760 serial_priv->read_urb = usb_alloc_urb(0, GFP_KERNEL);
761 if (!serial_priv->read_urb) {
762 dev_err(&serial->dev->dev, "No free urbs available\n");
766 usb_fill_bulk_urb(serial_priv->read_urb, serial->dev,
767 usb_rcvbulkpipe(serial->dev,
768 port0->bulk_in_endpointAddress),
769 serial_priv->read_buffer,
770 sizeof(serial_priv->read_buffer),
771 qt2_read_bulk_callback, serial);
773 status = usb_submit_urb(serial_priv->read_urb, GFP_KERNEL);
775 dev_err(&serial->dev->dev,
776 "%s - submit read urb failed %i\n", __func__, status);
777 usb_free_urb(serial_priv->read_urb);
784 static int qt2_attach(struct usb_serial *serial)
786 struct qt2_serial_private *serial_priv;
790 status = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
791 0xc2, 0x40, 0x8000, 0, NULL, 0,
794 dev_err(&serial->dev->dev,
795 "%s - failed to power on unit: %i\n", __func__, status);
799 serial_priv = kzalloc(sizeof(*serial_priv), GFP_KERNEL);
801 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
805 usb_set_serial_data(serial, serial_priv);
807 status = qt2_setup_urbs(serial);
818 static int qt2_port_probe(struct usb_serial_port *port)
820 struct usb_serial *serial = port->serial;
821 struct qt2_port_private *port_priv;
824 port_priv = kzalloc(sizeof(*port_priv), GFP_KERNEL);
828 spin_lock_init(&port_priv->lock);
829 spin_lock_init(&port_priv->urb_lock);
830 port_priv->port = port;
832 port_priv->write_urb = usb_alloc_urb(0, GFP_KERNEL);
833 if (!port_priv->write_urb) {
837 bEndpointAddress = serial->port[0]->bulk_out_endpointAddress;
838 usb_fill_bulk_urb(port_priv->write_urb, serial->dev,
839 usb_sndbulkpipe(serial->dev, bEndpointAddress),
840 port_priv->write_buffer,
841 sizeof(port_priv->write_buffer),
842 qt2_write_bulk_callback, port);
844 usb_set_serial_port_data(port, port_priv);
849 static int qt2_port_remove(struct usb_serial_port *port)
851 struct qt2_port_private *port_priv;
853 port_priv = usb_get_serial_port_data(port);
854 usb_free_urb(port_priv->write_urb);
860 static int qt2_tiocmget(struct tty_struct *tty)
862 struct usb_serial_port *port = tty->driver_data;
863 struct usb_device *dev = port->serial->dev;
864 struct qt2_port_private *port_priv = usb_get_serial_port_data(port);
868 d = kzalloc(2, GFP_KERNEL);
872 r = qt2_getregister(dev, port_priv->device_port, UART_MCR, d);
876 r = qt2_getregister(dev, port_priv->device_port, UART_MSR, d + 1);
880 r = (d[0] & UART_MCR_DTR ? TIOCM_DTR : 0) |
881 (d[0] & UART_MCR_RTS ? TIOCM_RTS : 0) |
882 (d[1] & UART_MSR_CTS ? TIOCM_CTS : 0) |
883 (d[1] & UART_MSR_DCD ? TIOCM_CAR : 0) |
884 (d[1] & UART_MSR_RI ? TIOCM_RI : 0) |
885 (d[1] & UART_MSR_DSR ? TIOCM_DSR : 0);
892 static int qt2_tiocmset(struct tty_struct *tty,
893 unsigned int set, unsigned int clear)
895 struct qt2_port_private *port_priv;
897 port_priv = usb_get_serial_port_data(tty->driver_data);
898 return update_mctrl(port_priv, set, clear);
901 static void qt2_break_ctl(struct tty_struct *tty, int break_state)
903 struct usb_serial_port *port = tty->driver_data;
904 struct qt2_port_private *port_priv;
908 port_priv = usb_get_serial_port_data(port);
910 if (!port_priv->is_open) {
912 "%s - port is not open\n", __func__);
916 val = (break_state == -1) ? 1 : 0;
918 status = qt2_control_msg(port->serial->dev, QT2_BREAK_CONTROL,
919 val, port_priv->device_port);
922 "%s - failed to send control message: %i\n", __func__,
928 static void qt2_dtr_rts(struct usb_serial_port *port, int on)
930 struct usb_device *dev = port->serial->dev;
931 struct qt2_port_private *port_priv = usb_get_serial_port_data(port);
933 /* Disable flow control */
935 if (qt2_setregister(dev, port_priv->device_port,
937 dev_warn(&port->dev, "error from flowcontrol urb\n");
939 /* drop RTS and DTR */
941 update_mctrl(port_priv, TIOCM_DTR | TIOCM_RTS, 0);
943 update_mctrl(port_priv, 0, TIOCM_DTR | TIOCM_RTS);
946 static void qt2_update_msr(struct usb_serial_port *port, unsigned char *ch)
948 struct qt2_port_private *port_priv;
949 u8 newMSR = (u8) *ch;
952 port_priv = usb_get_serial_port_data(port);
954 spin_lock_irqsave(&port_priv->lock, flags);
955 port_priv->shadowMSR = newMSR;
956 spin_unlock_irqrestore(&port_priv->lock, flags);
958 if (newMSR & UART_MSR_ANY_DELTA) {
959 /* update input line counters */
960 if (newMSR & UART_MSR_DCTS)
961 port_priv->icount.cts++;
963 if (newMSR & UART_MSR_DDSR)
964 port_priv->icount.dsr++;
966 if (newMSR & UART_MSR_DDCD)
967 port_priv->icount.dcd++;
969 if (newMSR & UART_MSR_TERI)
970 port_priv->icount.rng++;
972 wake_up_interruptible(&port->delta_msr_wait);
976 static void qt2_update_lsr(struct usb_serial_port *port, unsigned char *ch)
978 struct qt2_port_private *port_priv;
979 struct async_icount *icount;
981 u8 newLSR = (u8) *ch;
983 port_priv = usb_get_serial_port_data(port);
985 if (newLSR & UART_LSR_BI)
986 newLSR &= (u8) (UART_LSR_OE | UART_LSR_BI);
988 spin_lock_irqsave(&port_priv->lock, flags);
989 port_priv->shadowLSR = newLSR;
990 spin_unlock_irqrestore(&port_priv->lock, flags);
992 icount = &port_priv->icount;
994 if (newLSR & UART_LSR_BRK_ERROR_BITS) {
996 if (newLSR & UART_LSR_BI)
999 if (newLSR & UART_LSR_OE)
1002 if (newLSR & UART_LSR_PE)
1005 if (newLSR & UART_LSR_FE)
1011 static int qt2_write_room(struct tty_struct *tty)
1013 struct usb_serial_port *port = tty->driver_data;
1014 struct qt2_port_private *port_priv;
1015 unsigned long flags = 0;
1018 port_priv = usb_get_serial_port_data(port);
1020 spin_lock_irqsave(&port_priv->urb_lock, flags);
1022 if (port_priv->urb_in_use)
1025 r = QT2_WRITE_BUFFER_SIZE - QT2_WRITE_CONTROL_SIZE;
1027 spin_unlock_irqrestore(&port_priv->urb_lock, flags);
1032 static int qt2_write(struct tty_struct *tty,
1033 struct usb_serial_port *port,
1034 const unsigned char *buf, int count)
1036 struct qt2_port_private *port_priv;
1037 struct urb *write_urb;
1038 unsigned char *data;
1039 unsigned long flags;
1043 port_priv = usb_get_serial_port_data(port);
1045 if (port_priv->write_urb == NULL) {
1046 dev_err(&port->dev, "%s - no output urb\n", __func__);
1049 write_urb = port_priv->write_urb;
1051 count = min(count, QT2_WRITE_BUFFER_SIZE - QT2_WRITE_CONTROL_SIZE);
1053 data = write_urb->transfer_buffer;
1054 spin_lock_irqsave(&port_priv->urb_lock, flags);
1055 if (port_priv->urb_in_use == true) {
1056 dev_err(&port->dev, "qt2_write - urb is in use\n");
1060 *data++ = QT2_CONTROL_BYTE;
1061 *data++ = QT2_CONTROL_BYTE;
1062 *data++ = port_priv->device_port;
1063 put_unaligned_le16(count, data);
1065 memcpy(data, buf, count);
1067 write_urb->transfer_buffer_length = count + QT2_WRITE_CONTROL_SIZE;
1069 status = usb_submit_urb(write_urb, GFP_ATOMIC);
1071 port_priv->urb_in_use = true;
1076 spin_unlock_irqrestore(&port_priv->urb_lock, flags);
1081 static struct usb_serial_driver qt2_device = {
1083 .owner = THIS_MODULE,
1084 .name = "quatech-serial",
1086 .description = DRIVER_DESC,
1087 .id_table = id_table,
1091 .write_room = qt2_write_room,
1092 .calc_num_ports = qt2_calc_num_ports,
1093 .attach = qt2_attach,
1094 .release = qt2_release,
1095 .disconnect = qt2_disconnect,
1096 .port_probe = qt2_port_probe,
1097 .port_remove = qt2_port_remove,
1098 .dtr_rts = qt2_dtr_rts,
1099 .break_ctl = qt2_break_ctl,
1100 .tiocmget = qt2_tiocmget,
1101 .tiocmset = qt2_tiocmset,
1102 .get_icount = qt2_get_icount,
1104 .set_termios = qt2_set_termios,
1107 static struct usb_serial_driver *const serial_drivers[] = {
1111 module_usb_serial_driver(serial_drivers, id_table);
1113 MODULE_DESCRIPTION(DRIVER_DESC);
1114 MODULE_LICENSE("GPL");