2 * Silicon Laboratories CP2101/CP2102 USB to RS232 serial adaptor driver
4 * Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk)
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
8 * 2 as published by the Free Software Foundation.
10 * Support to set flow control line levels using TIOCMGET and TIOCMSET
11 * thanks to Karl Hiramoto karl@hiramoto.org. RTSCTS hardware flow
12 * control thanks to Munir Nassar nassarmu@real-time.com
15 * Buffers are not flushed when the port is opened.
16 * Multiple calls to write() may fail with "Resource temporarily unavailable"
20 #include <linux/kernel.h>
21 #include <linux/errno.h>
22 #include <linux/slab.h>
23 #include <linux/tty.h>
24 #include <linux/tty_flip.h>
25 #include <linux/module.h>
26 #include <linux/moduleparam.h>
27 #include <linux/usb.h>
28 #include <linux/uaccess.h>
29 #include <linux/usb/serial.h>
34 #define DRIVER_VERSION "v0.07"
35 #define DRIVER_DESC "Silicon Labs CP2101/CP2102 RS232 serial adaptor driver"
40 static int cp2101_open(struct tty_struct *, struct usb_serial_port *,
42 static void cp2101_cleanup(struct usb_serial_port *);
43 static void cp2101_close(struct tty_struct *, struct usb_serial_port *,
45 static void cp2101_get_termios(struct tty_struct *);
46 static void cp2101_set_termios(struct tty_struct *, struct usb_serial_port *,
48 static int cp2101_tiocmget(struct tty_struct *, struct file *);
49 static int cp2101_tiocmset(struct tty_struct *, struct file *,
50 unsigned int, unsigned int);
51 static void cp2101_break_ctl(struct tty_struct *, int);
52 static int cp2101_startup(struct usb_serial *);
53 static void cp2101_shutdown(struct usb_serial *);
58 static struct usb_device_id id_table [] = {
59 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
60 { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
61 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
62 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
63 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
64 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
65 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
66 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
67 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
68 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
69 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
70 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
71 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
72 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
73 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
74 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
75 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
76 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
77 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
78 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
79 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
80 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
81 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
82 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
83 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
84 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
85 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
86 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
87 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
88 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
89 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */
90 { USB_DEVICE(0x10c4, 0x8293) }, /* Telegesys ETRX2USB */
91 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
92 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
93 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
94 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
95 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
96 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
97 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
98 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
99 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
100 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
101 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
102 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
103 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
104 { } /* Terminating Entry */
107 MODULE_DEVICE_TABLE(usb, id_table);
109 static struct usb_driver cp2101_driver = {
111 .probe = usb_serial_probe,
112 .disconnect = usb_serial_disconnect,
113 .id_table = id_table,
117 static struct usb_serial_driver cp2101_device = {
119 .owner = THIS_MODULE,
122 .usb_driver = &cp2101_driver,
123 .id_table = id_table,
126 .close = cp2101_close,
127 .break_ctl = cp2101_break_ctl,
128 .set_termios = cp2101_set_termios,
129 .tiocmget = cp2101_tiocmget,
130 .tiocmset = cp2101_tiocmset,
131 .attach = cp2101_startup,
132 .shutdown = cp2101_shutdown,
135 /* Config request types */
136 #define REQTYPE_HOST_TO_DEVICE 0x41
137 #define REQTYPE_DEVICE_TO_HOST 0xc1
139 /* Config SET requests. To GET, add 1 to the request number */
140 #define CP2101_UART 0x00 /* Enable / Disable */
141 #define CP2101_BAUDRATE 0x01 /* (BAUD_RATE_GEN_FREQ / baudrate) */
142 #define CP2101_BITS 0x03 /* 0x(0)(databits)(parity)(stopbits) */
143 #define CP2101_BREAK 0x05 /* On / Off */
144 #define CP2101_CONTROL 0x07 /* Flow control line states */
145 #define CP2101_MODEMCTL 0x13 /* Modem controls */
146 #define CP2101_CONFIG_6 0x19 /* 6 bytes of config data ??? */
149 #define UART_ENABLE 0x0001
150 #define UART_DISABLE 0x0000
152 /* CP2101_BAUDRATE */
153 #define BAUD_RATE_GEN_FREQ 0x384000
156 #define BITS_DATA_MASK 0X0f00
157 #define BITS_DATA_5 0X0500
158 #define BITS_DATA_6 0X0600
159 #define BITS_DATA_7 0X0700
160 #define BITS_DATA_8 0X0800
161 #define BITS_DATA_9 0X0900
163 #define BITS_PARITY_MASK 0x00f0
164 #define BITS_PARITY_NONE 0x0000
165 #define BITS_PARITY_ODD 0x0010
166 #define BITS_PARITY_EVEN 0x0020
167 #define BITS_PARITY_MARK 0x0030
168 #define BITS_PARITY_SPACE 0x0040
170 #define BITS_STOP_MASK 0x000f
171 #define BITS_STOP_1 0x0000
172 #define BITS_STOP_1_5 0x0001
173 #define BITS_STOP_2 0x0002
176 #define BREAK_ON 0x0000
177 #define BREAK_OFF 0x0001
180 #define CONTROL_DTR 0x0001
181 #define CONTROL_RTS 0x0002
182 #define CONTROL_CTS 0x0010
183 #define CONTROL_DSR 0x0020
184 #define CONTROL_RING 0x0040
185 #define CONTROL_DCD 0x0080
186 #define CONTROL_WRITE_DTR 0x0100
187 #define CONTROL_WRITE_RTS 0x0200
191 * Reads from the CP2101 configuration registers
192 * 'size' is specified in bytes.
193 * 'data' is a pointer to a pre-allocated array of integers large
194 * enough to hold 'size' bytes (with 4 bytes to each integer)
196 static int cp2101_get_config(struct usb_serial_port *port, u8 request,
197 unsigned int *data, int size)
199 struct usb_serial *serial = port->serial;
201 int result, i, length;
203 /* Number of integers required to contain the array */
204 length = (((size - 1) | 3) + 1)/4;
206 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
208 dev_err(&port->dev, "%s - out of memory.\n", __func__);
212 /* For get requests, the request number must be incremented */
215 /* Issue the request, attempting to read 'size' bytes */
216 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
217 request, REQTYPE_DEVICE_TO_HOST, 0x0000,
220 /* Convert data into an array of integers */
221 for (i = 0; i < length; i++)
222 data[i] = le32_to_cpu(buf[i]);
226 if (result != size) {
227 dev_err(&port->dev, "%s - Unable to send config request, "
228 "request=0x%x size=%d result=%d\n",
229 __func__, request, size, result);
238 * Writes to the CP2101 configuration registers
239 * Values less than 16 bits wide are sent directly
240 * 'size' is specified in bytes.
242 static int cp2101_set_config(struct usb_serial_port *port, u8 request,
243 unsigned int *data, int size)
245 struct usb_serial *serial = port->serial;
247 int result, i, length;
249 /* Number of integers required to contain the array */
250 length = (((size - 1) | 3) + 1)/4;
252 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
254 dev_err(&port->dev, "%s - out of memory.\n",
259 /* Array of integers into bytes */
260 for (i = 0; i < length; i++)
261 buf[i] = cpu_to_le32(data[i]);
264 result = usb_control_msg(serial->dev,
265 usb_sndctrlpipe(serial->dev, 0),
266 request, REQTYPE_HOST_TO_DEVICE, 0x0000,
269 result = usb_control_msg(serial->dev,
270 usb_sndctrlpipe(serial->dev, 0),
271 request, REQTYPE_HOST_TO_DEVICE, data[0],
277 if ((size > 2 && result != size) || result < 0) {
278 dev_err(&port->dev, "%s - Unable to send request, "
279 "request=0x%x size=%d result=%d\n",
280 __func__, request, size, result);
284 /* Single data value */
285 result = usb_control_msg(serial->dev,
286 usb_sndctrlpipe(serial->dev, 0),
287 request, REQTYPE_HOST_TO_DEVICE, data[0],
293 * cp2101_set_config_single
294 * Convenience function for calling cp2101_set_config on single data values
295 * without requiring an integer pointer
297 static inline int cp2101_set_config_single(struct usb_serial_port *port,
298 u8 request, unsigned int data)
300 return cp2101_set_config(port, request, &data, 2);
303 static int cp2101_open(struct tty_struct *tty, struct usb_serial_port *port,
306 struct usb_serial *serial = port->serial;
309 dbg("%s - port %d", __func__, port->number);
311 if (cp2101_set_config_single(port, CP2101_UART, UART_ENABLE)) {
312 dev_err(&port->dev, "%s - Unable to enable UART\n",
317 /* Start reading from the device */
318 usb_fill_bulk_urb(port->read_urb, serial->dev,
319 usb_rcvbulkpipe(serial->dev,
320 port->bulk_in_endpointAddress),
321 port->read_urb->transfer_buffer,
322 port->read_urb->transfer_buffer_length,
323 serial->type->read_bulk_callback,
325 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
327 dev_err(&port->dev, "%s - failed resubmitting read urb, "
328 "error %d\n", __func__, result);
332 /* Configure the termios structure */
333 cp2101_get_termios(tty);
335 /* Set the DTR and RTS pins low */
336 cp2101_tiocmset(tty, NULL, TIOCM_DTR | TIOCM_RTS, 0);
341 static void cp2101_cleanup(struct usb_serial_port *port)
343 struct usb_serial *serial = port->serial;
345 dbg("%s - port %d", __func__, port->number);
348 /* shutdown any bulk reads that might be going on */
349 if (serial->num_bulk_out)
350 usb_kill_urb(port->write_urb);
351 if (serial->num_bulk_in)
352 usb_kill_urb(port->read_urb);
356 static void cp2101_close(struct tty_struct *tty, struct usb_serial_port *port,
359 dbg("%s - port %d", __func__, port->number);
361 /* shutdown our urbs */
362 dbg("%s - shutting down urbs", __func__);
363 usb_kill_urb(port->write_urb);
364 usb_kill_urb(port->read_urb);
366 mutex_lock(&port->serial->disc_mutex);
367 if (!port->serial->disconnected)
368 cp2101_set_config_single(port, CP2101_UART, UART_DISABLE);
369 mutex_unlock(&port->serial->disc_mutex);
374 * Reads the baud rate, data bits, parity, stop bits and flow control mode
375 * from the device, corrects any unsupported values, and configures the
376 * termios structure to reflect the state of the device
378 static void cp2101_get_termios (struct tty_struct *tty)
380 struct usb_serial_port *port = tty->driver_data;
381 unsigned int cflag, modem_ctl[4];
385 dbg("%s - port %d", __func__, port->number);
387 cp2101_get_config(port, CP2101_BAUDRATE, &baud, 2);
388 /* Convert to baudrate */
390 baud = BAUD_RATE_GEN_FREQ / baud;
392 dbg("%s - baud rate = %d", __func__, baud);
394 tty_encode_baud_rate(tty, baud, baud);
395 cflag = tty->termios->c_cflag;
397 cp2101_get_config(port, CP2101_BITS, &bits, 2);
399 switch (bits & BITS_DATA_MASK) {
401 dbg("%s - data bits = 5", __func__);
405 dbg("%s - data bits = 6", __func__);
409 dbg("%s - data bits = 7", __func__);
413 dbg("%s - data bits = 8", __func__);
417 dbg("%s - data bits = 9 (not supported, using 8 data bits)",
420 bits &= ~BITS_DATA_MASK;
422 cp2101_set_config(port, CP2101_BITS, &bits, 2);
425 dbg("%s - Unknown number of data bits, using 8", __func__);
427 bits &= ~BITS_DATA_MASK;
429 cp2101_set_config(port, CP2101_BITS, &bits, 2);
433 switch (bits & BITS_PARITY_MASK) {
434 case BITS_PARITY_NONE:
435 dbg("%s - parity = NONE", __func__);
438 case BITS_PARITY_ODD:
439 dbg("%s - parity = ODD", __func__);
440 cflag |= (PARENB|PARODD);
442 case BITS_PARITY_EVEN:
443 dbg("%s - parity = EVEN", __func__);
447 case BITS_PARITY_MARK:
448 dbg("%s - parity = MARK (not supported, disabling parity)",
451 bits &= ~BITS_PARITY_MASK;
452 cp2101_set_config(port, CP2101_BITS, &bits, 2);
454 case BITS_PARITY_SPACE:
455 dbg("%s - parity = SPACE (not supported, disabling parity)",
458 bits &= ~BITS_PARITY_MASK;
459 cp2101_set_config(port, CP2101_BITS, &bits, 2);
462 dbg("%s - Unknown parity mode, disabling parity", __func__);
464 bits &= ~BITS_PARITY_MASK;
465 cp2101_set_config(port, CP2101_BITS, &bits, 2);
470 switch (bits & BITS_STOP_MASK) {
472 dbg("%s - stop bits = 1", __func__);
475 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
477 bits &= ~BITS_STOP_MASK;
478 cp2101_set_config(port, CP2101_BITS, &bits, 2);
481 dbg("%s - stop bits = 2", __func__);
485 dbg("%s - Unknown number of stop bits, using 1 stop bit",
487 bits &= ~BITS_STOP_MASK;
488 cp2101_set_config(port, CP2101_BITS, &bits, 2);
492 cp2101_get_config(port, CP2101_MODEMCTL, modem_ctl, 16);
493 if (modem_ctl[0] & 0x0008) {
494 dbg("%s - flow control = CRTSCTS", __func__);
497 dbg("%s - flow control = NONE", __func__);
501 tty->termios->c_cflag = cflag;
504 static void cp2101_set_termios(struct tty_struct *tty,
505 struct usb_serial_port *port, struct ktermios *old_termios)
507 unsigned int cflag, old_cflag;
508 unsigned int baud = 0, bits;
509 unsigned int modem_ctl[4];
511 dbg("%s - port %d", __func__, port->number);
516 tty->termios->c_cflag &= ~CMSPAR;
517 cflag = tty->termios->c_cflag;
518 old_cflag = old_termios->c_cflag;
519 baud = tty_get_baud_rate(tty);
521 /* If the baud rate is to be updated*/
522 if (baud != tty_termios_baud_rate(old_termios)) {
551 dbg("%s - Setting baud rate to %d baud", __func__,
553 if (cp2101_set_config_single(port, CP2101_BAUDRATE,
554 (BAUD_RATE_GEN_FREQ / baud))) {
555 dev_err(&port->dev, "Baud rate requested not "
556 "supported by device\n");
557 baud = tty_termios_baud_rate(old_termios);
561 /* Report back the resulting baud rate */
562 tty_encode_baud_rate(tty, baud, baud);
564 /* If the number of data bits is to be updated */
565 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
566 cp2101_get_config(port, CP2101_BITS, &bits, 2);
567 bits &= ~BITS_DATA_MASK;
568 switch (cflag & CSIZE) {
571 dbg("%s - data bits = 5", __func__);
575 dbg("%s - data bits = 6", __func__);
579 dbg("%s - data bits = 7", __func__);
583 dbg("%s - data bits = 8", __func__);
587 dbg("%s - data bits = 9", __func__);
590 dev_err(&port->dev, "cp2101 driver does not "
591 "support the number of bits requested,"
592 " using 8 bit mode\n");
596 if (cp2101_set_config(port, CP2101_BITS, &bits, 2))
597 dev_err(&port->dev, "Number of data bits requested "
598 "not supported by device\n");
601 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
602 cp2101_get_config(port, CP2101_BITS, &bits, 2);
603 bits &= ~BITS_PARITY_MASK;
604 if (cflag & PARENB) {
605 if (cflag & PARODD) {
606 bits |= BITS_PARITY_ODD;
607 dbg("%s - parity = ODD", __func__);
609 bits |= BITS_PARITY_EVEN;
610 dbg("%s - parity = EVEN", __func__);
613 if (cp2101_set_config(port, CP2101_BITS, &bits, 2))
614 dev_err(&port->dev, "Parity mode not supported "
618 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
619 cp2101_get_config(port, CP2101_BITS, &bits, 2);
620 bits &= ~BITS_STOP_MASK;
621 if (cflag & CSTOPB) {
623 dbg("%s - stop bits = 2", __func__);
626 dbg("%s - stop bits = 1", __func__);
628 if (cp2101_set_config(port, CP2101_BITS, &bits, 2))
629 dev_err(&port->dev, "Number of stop bits requested "
630 "not supported by device\n");
633 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
634 cp2101_get_config(port, CP2101_MODEMCTL, modem_ctl, 16);
635 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
636 __func__, modem_ctl[0], modem_ctl[1],
637 modem_ctl[2], modem_ctl[3]);
639 if (cflag & CRTSCTS) {
640 modem_ctl[0] &= ~0x7B;
641 modem_ctl[0] |= 0x09;
643 dbg("%s - flow control = CRTSCTS", __func__);
645 modem_ctl[0] &= ~0x7B;
646 modem_ctl[0] |= 0x01;
647 modem_ctl[1] |= 0x40;
648 dbg("%s - flow control = NONE", __func__);
651 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
652 __func__, modem_ctl[0], modem_ctl[1],
653 modem_ctl[2], modem_ctl[3]);
654 cp2101_set_config(port, CP2101_MODEMCTL, modem_ctl, 16);
659 static int cp2101_tiocmset (struct tty_struct *tty, struct file *file,
660 unsigned int set, unsigned int clear)
662 struct usb_serial_port *port = tty->driver_data;
663 unsigned int control = 0;
665 dbg("%s - port %d", __func__, port->number);
667 if (set & TIOCM_RTS) {
668 control |= CONTROL_RTS;
669 control |= CONTROL_WRITE_RTS;
671 if (set & TIOCM_DTR) {
672 control |= CONTROL_DTR;
673 control |= CONTROL_WRITE_DTR;
675 if (clear & TIOCM_RTS) {
676 control &= ~CONTROL_RTS;
677 control |= CONTROL_WRITE_RTS;
679 if (clear & TIOCM_DTR) {
680 control &= ~CONTROL_DTR;
681 control |= CONTROL_WRITE_DTR;
684 dbg("%s - control = 0x%.4x", __func__, control);
686 return cp2101_set_config(port, CP2101_CONTROL, &control, 2);
690 static int cp2101_tiocmget (struct tty_struct *tty, struct file *file)
692 struct usb_serial_port *port = tty->driver_data;
693 unsigned int control;
696 dbg("%s - port %d", __func__, port->number);
698 cp2101_get_config(port, CP2101_CONTROL, &control, 1);
700 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
701 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
702 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
703 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
704 |((control & CONTROL_RING)? TIOCM_RI : 0)
705 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
707 dbg("%s - control = 0x%.2x", __func__, control);
712 static void cp2101_break_ctl (struct tty_struct *tty, int break_state)
714 struct usb_serial_port *port = tty->driver_data;
717 dbg("%s - port %d", __func__, port->number);
718 if (break_state == 0)
722 dbg("%s - turning break %s", __func__,
723 state == BREAK_OFF ? "off" : "on");
724 cp2101_set_config(port, CP2101_BREAK, &state, 2);
727 static int cp2101_startup(struct usb_serial *serial)
729 /* CP2101 buffers behave strangely unless device is reset */
730 usb_reset_device(serial->dev);
734 static void cp2101_shutdown(struct usb_serial *serial)
740 /* Stop reads and writes on all ports */
741 for (i = 0; i < serial->num_ports; ++i)
742 cp2101_cleanup(serial->port[i]);
745 static int __init cp2101_init(void)
749 retval = usb_serial_register(&cp2101_device);
751 return retval; /* Failed to register */
753 retval = usb_register(&cp2101_driver);
755 /* Failed to register */
756 usb_serial_deregister(&cp2101_device);
761 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
766 static void __exit cp2101_exit(void)
768 usb_deregister(&cp2101_driver);
769 usb_serial_deregister(&cp2101_device);
772 module_init(cp2101_init);
773 module_exit(cp2101_exit);
775 MODULE_DESCRIPTION(DRIVER_DESC);
776 MODULE_VERSION(DRIVER_VERSION);
777 MODULE_LICENSE("GPL");
779 module_param(debug, bool, S_IRUGO | S_IWUSR);
780 MODULE_PARM_DESC(debug, "Enable verbose debugging messages");