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 wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */
132 struct async_icount icount;
134 struct usb_serial_port *port;
137 static void qt2_update_lsr(struct usb_serial_port *port, unsigned char *ch);
138 static void qt2_update_msr(struct usb_serial_port *port, unsigned char *ch);
139 static void qt2_write_bulk_callback(struct urb *urb);
140 static void qt2_read_bulk_callback(struct urb *urb);
142 static void qt2_release(struct usb_serial *serial)
144 struct qt2_serial_private *serial_priv;
146 serial_priv = usb_get_serial_data(serial);
148 usb_free_urb(serial_priv->read_urb);
152 static inline int calc_baud_divisor(int baudrate)
156 divisor = MAX_BAUD_RATE / baudrate;
157 rem = MAX_BAUD_RATE % baudrate;
158 /* Round to nearest divisor */
159 if (((rem * 2) >= baudrate) && (baudrate != 110))
165 static inline int qt2_set_port_config(struct usb_device *dev,
166 unsigned char port_number,
167 u16 baudrate, u16 lcr)
169 int divisor = calc_baud_divisor(baudrate);
170 u16 index = ((u16) (lcr << 8) | (u16) (port_number));
172 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
173 QT2_GET_SET_UART, 0x40,
174 divisor, index, NULL, 0, QT2_USB_TIMEOUT);
177 static inline int qt2_control_msg(struct usb_device *dev,
178 u8 request, u16 data, u16 index)
180 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
181 request, 0x40, data, index,
182 NULL, 0, QT2_USB_TIMEOUT);
185 static inline int qt2_setdevice(struct usb_device *dev, u8 *data)
187 u16 x = ((u16) (data[1] << 8) | (u16) (data[0]));
189 return qt2_control_msg(dev, QT_SET_GET_DEVICE, x, 0);
193 static inline int qt2_getdevice(struct usb_device *dev, u8 *data)
195 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
196 QT_SET_GET_DEVICE, 0xc0, 0, 0,
197 data, 3, QT2_USB_TIMEOUT);
200 static inline int qt2_getregister(struct usb_device *dev,
205 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
206 QT_SET_GET_REGISTER, 0xc0, reg,
207 uart, data, sizeof(*data), QT2_USB_TIMEOUT);
211 static inline int qt2_setregister(struct usb_device *dev,
212 u8 uart, u8 reg, u16 data)
214 u16 value = (data << 8) | reg;
216 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
217 QT_SET_GET_REGISTER, 0x40, value, uart,
218 NULL, 0, QT2_USB_TIMEOUT);
221 static inline int update_mctrl(struct qt2_port_private *port_priv,
222 unsigned int set, unsigned int clear)
224 struct usb_serial_port *port = port_priv->port;
225 struct usb_device *dev = port->serial->dev;
229 if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) {
231 "update_mctrl - DTR|RTS not being set|cleared\n");
232 return 0; /* no change */
235 clear &= ~set; /* 'set' takes precedence over 'clear' */
238 urb_value |= UART_MCR_DTR;
240 urb_value |= UART_MCR_RTS;
242 status = qt2_setregister(dev, port_priv->device_port, UART_MCR,
246 "update_mctrl - Error from MODEM_CTRL urb: %i\n",
251 static int qt2_calc_num_ports(struct usb_serial *serial)
253 struct qt2_device_detail d;
256 for (i = 0; d = qt2_device_details[i], d.product_id != 0; i++) {
257 if (d.product_id == le16_to_cpu(serial->dev->descriptor.idProduct))
261 /* we didn't recognize the device */
262 dev_err(&serial->dev->dev,
263 "don't know the number of ports, assuming 1\n");
268 static void qt2_set_termios(struct tty_struct *tty,
269 struct usb_serial_port *port,
270 struct ktermios *old_termios)
272 struct usb_device *dev = port->serial->dev;
273 struct qt2_port_private *port_priv;
274 struct ktermios *termios = &tty->termios;
276 unsigned int cflag = termios->c_cflag;
280 port_priv = usb_get_serial_port_data(port);
282 if (cflag & PARENB) {
284 new_lcr |= UART_LCR_PARITY;
286 new_lcr |= SERIAL_EVEN_PARITY;
289 switch (cflag & CSIZE) {
291 new_lcr |= UART_LCR_WLEN5;
294 new_lcr |= UART_LCR_WLEN6;
297 new_lcr |= UART_LCR_WLEN7;
301 new_lcr |= UART_LCR_WLEN8;
305 baud = tty_get_baud_rate(tty);
309 status = qt2_set_port_config(dev, port_priv->device_port, baud,
312 dev_err(&port->dev, "%s - qt2_set_port_config failed: %i\n",
316 status = qt2_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
318 port_priv->device_port);
320 status = qt2_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
321 0, port_priv->device_port);
323 dev_err(&port->dev, "%s - set HW flow control failed: %i\n",
326 if (I_IXOFF(tty) || I_IXON(tty)) {
327 u16 x = ((u16) (START_CHAR(tty) << 8) | (u16) (STOP_CHAR(tty)));
329 status = qt2_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
330 x, port_priv->device_port);
332 status = qt2_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
333 0, port_priv->device_port);
336 dev_err(&port->dev, "%s - set SW flow control failed: %i\n",
341 static int qt2_open(struct tty_struct *tty, struct usb_serial_port *port)
343 struct usb_serial *serial;
344 struct qt2_port_private *port_priv;
350 device_port = (u16) (port->number - port->serial->minor);
352 serial = port->serial;
354 port_priv = usb_get_serial_port_data(port);
356 /* set the port to RS232 mode */
357 status = qt2_control_msg(serial->dev, QT2_GET_SET_QMCR,
358 QT2_QMCR_RS232, device_port);
361 "%s failed to set RS232 mode for port %i error %i\n",
362 __func__, device_port, status);
366 data = kzalloc(2, GFP_KERNEL);
371 status = usb_control_msg(serial->dev,
372 usb_rcvctrlpipe(serial->dev, 0),
373 QT_OPEN_CLOSE_CHANNEL,
375 device_port, data, 2, QT2_USB_TIMEOUT);
378 dev_err(&port->dev, "%s - open port failed %i", __func__,
384 spin_lock_irqsave(&port_priv->lock, flags);
385 port_priv->shadowLSR = data[0];
386 port_priv->shadowMSR = data[1];
387 spin_unlock_irqrestore(&port_priv->lock, flags);
391 /* set to default speed and 8bit word size */
392 status = qt2_set_port_config(serial->dev, device_port,
393 DEFAULT_BAUD_RATE, UART_LCR_WLEN8);
396 "%s - initial setup failed for port %i (%i)\n",
397 __func__, port->number, device_port);
401 port_priv->is_open = true;
402 port_priv->device_port = (u8) device_port;
405 qt2_set_termios(tty, port, &tty->termios);
411 static void qt2_close(struct usb_serial_port *port)
413 struct usb_serial *serial;
414 struct qt2_port_private *port_priv;
418 serial = port->serial;
419 port_priv = usb_get_serial_port_data(port);
421 port_priv->is_open = false;
423 spin_lock_irqsave(&port_priv->urb_lock, flags);
424 usb_kill_urb(port_priv->write_urb);
425 port_priv->urb_in_use = false;
426 spin_unlock_irqrestore(&port_priv->urb_lock, flags);
428 mutex_lock(&port->serial->disc_mutex);
429 if (port->serial->disconnected) {
430 mutex_unlock(&port->serial->disc_mutex);
434 /* flush the port transmit buffer */
435 i = usb_control_msg(serial->dev,
436 usb_rcvctrlpipe(serial->dev, 0),
437 QT2_FLUSH_DEVICE, 0x40, 1,
438 port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT);
441 dev_err(&port->dev, "%s - transmit buffer flush failed: %i\n",
444 /* flush the port receive buffer */
445 i = usb_control_msg(serial->dev,
446 usb_rcvctrlpipe(serial->dev, 0),
447 QT2_FLUSH_DEVICE, 0x40, 0,
448 port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT);
451 dev_err(&port->dev, "%s - receive buffer flush failed: %i\n",
455 i = usb_control_msg(serial->dev,
456 usb_sndctrlpipe(serial->dev, 0),
457 QT_OPEN_CLOSE_CHANNEL,
459 port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT);
462 dev_err(&port->dev, "%s - close port failed %i\n",
465 mutex_unlock(&port->serial->disc_mutex);
468 static void qt2_disconnect(struct usb_serial *serial)
470 struct qt2_serial_private *serial_priv = usb_get_serial_data(serial);
472 usb_kill_urb(serial_priv->read_urb);
475 static int get_serial_info(struct usb_serial_port *port,
476 struct serial_struct __user *retinfo)
478 struct serial_struct tmp;
483 memset(&tmp, 0, sizeof(tmp));
484 tmp.line = port->serial->minor;
487 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
488 tmp.xmit_fifo_size = port->bulk_out_size;
489 tmp.baud_base = 9600;
490 tmp.close_delay = 5*HZ;
491 tmp.closing_wait = 30*HZ;
493 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
498 static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
500 struct qt2_port_private *priv = usb_get_serial_port_data(port);
501 struct async_icount prev, cur;
504 spin_lock_irqsave(&priv->lock, flags);
506 spin_unlock_irqrestore(&priv->lock, flags);
509 wait_event_interruptible(priv->delta_msr_wait,
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 spin_lock_irqsave(&priv->lock, flags);
520 spin_unlock_irqrestore(&priv->lock, flags);
522 if ((prev.rng == cur.rng) &&
523 (prev.dsr == cur.dsr) &&
524 (prev.dcd == cur.dcd) &&
525 (prev.cts == cur.cts))
528 if ((arg & TIOCM_RNG && (prev.rng != cur.rng)) ||
529 (arg & TIOCM_DSR && (prev.dsr != cur.dsr)) ||
530 (arg & TIOCM_CD && (prev.dcd != cur.dcd)) ||
531 (arg & TIOCM_CTS && (prev.cts != cur.cts)))
537 static int qt2_get_icount(struct tty_struct *tty,
538 struct serial_icounter_struct *icount)
540 struct usb_serial_port *port = tty->driver_data;
541 struct qt2_port_private *priv = usb_get_serial_port_data(port);
542 struct async_icount cnow = priv->icount;
544 icount->cts = cnow.cts;
545 icount->dsr = cnow.dsr;
546 icount->rng = cnow.rng;
547 icount->dcd = cnow.dcd;
548 icount->rx = cnow.rx;
549 icount->tx = cnow.tx;
550 icount->frame = cnow.frame;
551 icount->overrun = cnow.overrun;
552 icount->parity = cnow.parity;
553 icount->brk = cnow.brk;
554 icount->buf_overrun = cnow.buf_overrun;
559 static int qt2_ioctl(struct tty_struct *tty,
560 unsigned int cmd, unsigned long arg)
562 struct usb_serial_port *port = tty->driver_data;
566 return get_serial_info(port,
567 (struct serial_struct __user *)arg);
570 return wait_modem_info(port, arg);
579 static void qt2_process_status(struct usb_serial_port *port, unsigned char *ch)
582 case QT2_LINE_STATUS:
583 qt2_update_lsr(port, ch + 1);
585 case QT2_MODEM_STATUS:
586 qt2_update_msr(port, ch + 1);
591 /* not needed, kept to document functionality */
592 static void qt2_process_xmit_empty(struct usb_serial_port *port,
597 bytes_written = (int)(*ch) + (int)(*(ch + 1) << 4);
600 /* not needed, kept to document functionality */
601 static void qt2_process_flush(struct usb_serial_port *port, unsigned char *ch)
606 void qt2_process_read_urb(struct urb *urb)
608 struct usb_serial *serial;
609 struct qt2_serial_private *serial_priv;
610 struct usb_serial_port *port;
611 struct qt2_port_private *port_priv;
612 struct tty_struct *tty;
616 unsigned char newport;
617 int len = urb->actual_length;
622 ch = urb->transfer_buffer;
624 serial = urb->context;
625 serial_priv = usb_get_serial_data(serial);
626 port = serial->port[serial_priv->current_port];
627 port_priv = usb_get_serial_port_data(port);
629 if (port_priv->is_open)
630 tty = tty_port_tty_get(&port->port);
632 for (i = 0; i < urb->actual_length; i++) {
633 ch = (unsigned char *)urb->transfer_buffer + i;
634 if ((i <= (len - 3)) &&
635 (*ch == QT2_CONTROL_BYTE) &&
636 (*(ch + 1) == QT2_CONTROL_BYTE)) {
639 case QT2_LINE_STATUS:
640 case QT2_MODEM_STATUS:
643 "%s - status message too short\n",
647 qt2_process_status(port, ch + 2);
654 "%s - xmit_empty message too short\n",
658 qt2_process_xmit_empty(port, ch + 3);
662 case QT2_CHANGE_PORT:
665 "%s - change_port message too short\n",
670 tty_flip_buffer_push(tty);
676 if (newport > serial->num_ports) {
678 "%s - port change to invalid port: %i\n",
683 serial_priv->current_port = newport;
684 port = serial->port[serial_priv->current_port];
685 port_priv = usb_get_serial_port_data(port);
686 if (port_priv->is_open)
687 tty = tty_port_tty_get(&port->port);
695 qt2_process_flush(port, ch + 2);
699 case QT2_CONTROL_ESCAPE:
700 tty_buffer_request_room(tty, 2);
701 tty_insert_flip_string(tty, ch, 2);
707 "%s - unsupported command %i\n",
708 __func__, *(ch + 2));
716 tty_buffer_request_room(tty, 1);
717 tty_insert_flip_string(tty, ch, 1);
722 tty_flip_buffer_push(tty);
727 static void qt2_write_bulk_callback(struct urb *urb)
729 struct usb_serial_port *port;
730 struct qt2_port_private *port_priv;
733 port_priv = usb_get_serial_port_data(port);
735 spin_lock(&port_priv->urb_lock);
737 port_priv->urb_in_use = false;
738 usb_serial_port_softint(port);
740 spin_unlock(&port_priv->urb_lock);
744 static void qt2_read_bulk_callback(struct urb *urb)
746 struct usb_serial *serial = urb->context;
750 dev_warn(&serial->dev->dev,
751 "%s - non-zero urb status: %i\n", __func__,
756 qt2_process_read_urb(urb);
758 status = usb_submit_urb(urb, GFP_ATOMIC);
760 dev_err(&serial->dev->dev,
761 "%s - resubmit read urb failed: %i\n",
765 static int qt2_setup_urbs(struct usb_serial *serial)
767 struct usb_serial_port *port0;
768 struct qt2_serial_private *serial_priv;
771 port0 = serial->port[0];
773 serial_priv = usb_get_serial_data(serial);
774 serial_priv->read_urb = usb_alloc_urb(0, GFP_KERNEL);
775 if (!serial_priv->read_urb) {
776 dev_err(&serial->dev->dev, "No free urbs available\n");
780 usb_fill_bulk_urb(serial_priv->read_urb, serial->dev,
781 usb_rcvbulkpipe(serial->dev,
782 port0->bulk_in_endpointAddress),
783 serial_priv->read_buffer,
784 sizeof(serial_priv->read_buffer),
785 qt2_read_bulk_callback, serial);
787 status = usb_submit_urb(serial_priv->read_urb, GFP_KERNEL);
789 dev_err(&serial->dev->dev,
790 "%s - submit read urb failed %i\n", __func__, status);
791 usb_free_urb(serial_priv->read_urb);
798 static int qt2_attach(struct usb_serial *serial)
800 struct qt2_serial_private *serial_priv;
804 status = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
805 0xc2, 0x40, 0x8000, 0, NULL, 0,
808 dev_err(&serial->dev->dev,
809 "%s - failed to power on unit: %i\n", __func__, status);
813 serial_priv = kzalloc(sizeof(*serial_priv), GFP_KERNEL);
815 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
819 usb_set_serial_data(serial, serial_priv);
821 status = qt2_setup_urbs(serial);
832 static int qt2_port_probe(struct usb_serial_port *port)
834 struct usb_serial *serial = port->serial;
835 struct qt2_port_private *port_priv;
838 port_priv = kzalloc(sizeof(*port_priv), GFP_KERNEL);
842 spin_lock_init(&port_priv->lock);
843 spin_lock_init(&port_priv->urb_lock);
844 init_waitqueue_head(&port_priv->delta_msr_wait);
845 port_priv->port = port;
847 port_priv->write_urb = usb_alloc_urb(0, GFP_KERNEL);
848 if (!port_priv->write_urb) {
852 bEndpointAddress = serial->port[0]->bulk_out_endpointAddress;
853 usb_fill_bulk_urb(port_priv->write_urb, serial->dev,
854 usb_sndbulkpipe(serial->dev, bEndpointAddress),
855 port_priv->write_buffer,
856 sizeof(port_priv->write_buffer),
857 qt2_write_bulk_callback, port);
859 usb_set_serial_port_data(port, port_priv);
864 static int qt2_port_remove(struct usb_serial_port *port)
866 struct qt2_port_private *port_priv;
868 port_priv = usb_get_serial_port_data(port);
869 usb_free_urb(port_priv->write_urb);
875 static int qt2_tiocmget(struct tty_struct *tty)
877 struct usb_serial_port *port = tty->driver_data;
878 struct usb_device *dev = port->serial->dev;
879 struct qt2_port_private *port_priv = usb_get_serial_port_data(port);
883 d = kzalloc(2, GFP_KERNEL);
887 r = qt2_getregister(dev, port_priv->device_port, UART_MCR, d);
891 r = qt2_getregister(dev, port_priv->device_port, UART_MSR, d + 1);
895 r = (d[0] & UART_MCR_DTR ? TIOCM_DTR : 0) |
896 (d[0] & UART_MCR_RTS ? TIOCM_RTS : 0) |
897 (d[1] & UART_MSR_CTS ? TIOCM_CTS : 0) |
898 (d[1] & UART_MSR_DCD ? TIOCM_CAR : 0) |
899 (d[1] & UART_MSR_RI ? TIOCM_RI : 0) |
900 (d[1] & UART_MSR_DSR ? TIOCM_DSR : 0);
907 static int qt2_tiocmset(struct tty_struct *tty,
908 unsigned int set, unsigned int clear)
910 struct qt2_port_private *port_priv;
912 port_priv = usb_get_serial_port_data(tty->driver_data);
913 return update_mctrl(port_priv, set, clear);
916 static void qt2_break_ctl(struct tty_struct *tty, int break_state)
918 struct usb_serial_port *port = tty->driver_data;
919 struct qt2_port_private *port_priv;
923 port_priv = usb_get_serial_port_data(port);
925 if (!port_priv->is_open) {
927 "%s - port is not open\n", __func__);
931 val = (break_state == -1) ? 1 : 0;
933 status = qt2_control_msg(port->serial->dev, QT2_BREAK_CONTROL,
934 val, port_priv->device_port);
937 "%s - failed to send control message: %i\n", __func__,
943 static void qt2_dtr_rts(struct usb_serial_port *port, int on)
945 struct usb_device *dev = port->serial->dev;
946 struct qt2_port_private *port_priv = usb_get_serial_port_data(port);
948 mutex_lock(&port->serial->disc_mutex);
949 if (!port->serial->disconnected) {
950 /* Disable flow control */
951 if (!on && qt2_setregister(dev, port_priv->device_port,
953 dev_warn(&port->dev, "error from flowcontrol urb\n");
954 /* drop RTS and DTR */
956 update_mctrl(port_priv, TIOCM_DTR | TIOCM_RTS, 0);
958 update_mctrl(port_priv, 0, TIOCM_DTR | TIOCM_RTS);
960 mutex_unlock(&port->serial->disc_mutex);
963 static void qt2_update_msr(struct usb_serial_port *port, unsigned char *ch)
965 struct qt2_port_private *port_priv;
966 u8 newMSR = (u8) *ch;
969 port_priv = usb_get_serial_port_data(port);
971 spin_lock_irqsave(&port_priv->lock, flags);
972 port_priv->shadowMSR = newMSR;
973 spin_unlock_irqrestore(&port_priv->lock, flags);
975 if (newMSR & UART_MSR_ANY_DELTA) {
976 /* update input line counters */
977 if (newMSR & UART_MSR_DCTS)
978 port_priv->icount.cts++;
980 if (newMSR & UART_MSR_DDSR)
981 port_priv->icount.dsr++;
983 if (newMSR & UART_MSR_DDCD)
984 port_priv->icount.dcd++;
986 if (newMSR & UART_MSR_TERI)
987 port_priv->icount.rng++;
989 wake_up_interruptible(&port_priv->delta_msr_wait);
993 static void qt2_update_lsr(struct usb_serial_port *port, unsigned char *ch)
995 struct qt2_port_private *port_priv;
996 struct async_icount *icount;
998 u8 newLSR = (u8) *ch;
1000 port_priv = usb_get_serial_port_data(port);
1002 if (newLSR & UART_LSR_BI)
1003 newLSR &= (u8) (UART_LSR_OE | UART_LSR_BI);
1005 spin_lock_irqsave(&port_priv->lock, flags);
1006 port_priv->shadowLSR = newLSR;
1007 spin_unlock_irqrestore(&port_priv->lock, flags);
1009 icount = &port_priv->icount;
1011 if (newLSR & UART_LSR_BRK_ERROR_BITS) {
1013 if (newLSR & UART_LSR_BI)
1016 if (newLSR & UART_LSR_OE)
1019 if (newLSR & UART_LSR_PE)
1022 if (newLSR & UART_LSR_FE)
1028 static int qt2_write_room(struct tty_struct *tty)
1030 struct usb_serial_port *port = tty->driver_data;
1031 struct qt2_port_private *port_priv;
1032 unsigned long flags = 0;
1035 port_priv = usb_get_serial_port_data(port);
1037 spin_lock_irqsave(&port_priv->urb_lock, flags);
1039 if (port_priv->urb_in_use)
1042 r = QT2_WRITE_BUFFER_SIZE - QT2_WRITE_CONTROL_SIZE;
1044 spin_unlock_irqrestore(&port_priv->urb_lock, flags);
1049 static int qt2_write(struct tty_struct *tty,
1050 struct usb_serial_port *port,
1051 const unsigned char *buf, int count)
1053 struct qt2_port_private *port_priv;
1054 struct urb *write_urb;
1055 unsigned char *data;
1056 unsigned long flags;
1060 port_priv = usb_get_serial_port_data(port);
1062 if (port_priv->write_urb == NULL) {
1063 dev_err(&port->dev, "%s - no output urb\n", __func__);
1066 write_urb = port_priv->write_urb;
1068 count = min(count, QT2_WRITE_BUFFER_SIZE - QT2_WRITE_CONTROL_SIZE);
1070 data = write_urb->transfer_buffer;
1071 spin_lock_irqsave(&port_priv->urb_lock, flags);
1072 if (port_priv->urb_in_use == true) {
1073 dev_err(&port->dev, "qt2_write - urb is in use\n");
1077 *data++ = QT2_CONTROL_BYTE;
1078 *data++ = QT2_CONTROL_BYTE;
1079 *data++ = port_priv->device_port;
1080 put_unaligned_le16(count, data);
1082 memcpy(data, buf, count);
1084 write_urb->transfer_buffer_length = count + QT2_WRITE_CONTROL_SIZE;
1086 status = usb_submit_urb(write_urb, GFP_ATOMIC);
1088 port_priv->urb_in_use = true;
1093 spin_unlock_irqrestore(&port_priv->urb_lock, flags);
1098 static struct usb_serial_driver qt2_device = {
1100 .owner = THIS_MODULE,
1101 .name = "quatech-serial",
1103 .description = DRIVER_DESC,
1104 .id_table = id_table,
1108 .write_room = qt2_write_room,
1109 .calc_num_ports = qt2_calc_num_ports,
1110 .attach = qt2_attach,
1111 .release = qt2_release,
1112 .disconnect = qt2_disconnect,
1113 .port_probe = qt2_port_probe,
1114 .port_remove = qt2_port_remove,
1115 .dtr_rts = qt2_dtr_rts,
1116 .break_ctl = qt2_break_ctl,
1117 .tiocmget = qt2_tiocmget,
1118 .tiocmset = qt2_tiocmset,
1119 .get_icount = qt2_get_icount,
1121 .set_termios = qt2_set_termios,
1124 static struct usb_serial_driver *const serial_drivers[] = {
1128 module_usb_serial_driver(serial_drivers, id_table);
1130 MODULE_DESCRIPTION(DRIVER_DESC);
1131 MODULE_LICENSE("GPL");