2 * Silicon Laboratories CP210x 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
16 #include <linux/kernel.h>
17 #include <linux/errno.h>
18 #include <linux/slab.h>
19 #include <linux/tty.h>
20 #include <linux/tty_flip.h>
21 #include <linux/module.h>
22 #include <linux/moduleparam.h>
23 #include <linux/usb.h>
24 #include <linux/uaccess.h>
25 #include <linux/usb/serial.h>
30 #define DRIVER_VERSION "v0.09"
31 #define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver"
36 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *);
37 static void cp210x_close(struct usb_serial_port *);
38 static void cp210x_get_termios(struct tty_struct *,
39 struct usb_serial_port *port);
40 static void cp210x_get_termios_port(struct usb_serial_port *port,
41 unsigned int *cflagp, unsigned int *baudp);
42 static void cp210x_change_speed(struct tty_struct *, struct usb_serial_port *,
44 static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *,
46 static int cp210x_tiocmget(struct tty_struct *);
47 static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int);
48 static int cp210x_tiocmset_port(struct usb_serial_port *port,
49 unsigned int, unsigned int);
50 static void cp210x_break_ctl(struct tty_struct *, int);
51 static int cp210x_startup(struct usb_serial *);
52 static void cp210x_release(struct usb_serial *);
53 static void cp210x_dtr_rts(struct usb_serial_port *p, int on);
57 static const struct usb_device_id id_table[] = {
58 { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */
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(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
62 { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
63 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
64 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
65 { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
66 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
67 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
68 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
69 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
70 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
71 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
72 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
73 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
74 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
75 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
76 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
77 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
78 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */
79 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
80 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
81 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
82 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
83 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
84 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
85 { USB_DEVICE(0x10C4, 0x80C4) }, /* Cygnal Integrated Products, Inc., Optris infrared thermometer */
86 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
87 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
88 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
89 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
90 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
91 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
92 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
93 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
94 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
95 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
96 { USB_DEVICE(0x10C4, 0x815F) }, /* Timewave HamLinkUSB */
97 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
98 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
99 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
100 { USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */
101 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
102 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
103 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
104 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
105 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
106 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
107 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
108 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
109 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
110 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */
111 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */
112 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
113 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
114 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
115 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
116 { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
117 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
118 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
119 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
120 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
121 { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */
122 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
123 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
124 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
125 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
126 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
127 { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */
128 { USB_DEVICE(0x10C4, 0xEA80) }, /* Silicon Labs factory default */
129 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
130 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
131 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
132 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
133 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
134 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
135 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
136 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
137 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
138 { USB_DEVICE(0x166A, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */
139 { USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */
140 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
141 { USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */
142 { USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */
143 { USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */
144 { USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */
145 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
146 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
147 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
148 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
149 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
150 { USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */
151 { USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */
152 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
153 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
154 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
155 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
156 { USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */
157 { USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */
158 { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */
159 { USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */
160 { USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */
161 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
162 { } /* Terminating Entry */
165 MODULE_DEVICE_TABLE(usb, id_table);
167 struct cp210x_port_private {
168 __u8 bInterfaceNumber;
171 static struct usb_serial_driver cp210x_device = {
173 .owner = THIS_MODULE,
176 .id_table = id_table,
179 .bulk_out_size = 256,
181 .close = cp210x_close,
182 .break_ctl = cp210x_break_ctl,
183 .set_termios = cp210x_set_termios,
184 .tiocmget = cp210x_tiocmget,
185 .tiocmset = cp210x_tiocmset,
186 .attach = cp210x_startup,
187 .release = cp210x_release,
188 .dtr_rts = cp210x_dtr_rts
191 static struct usb_serial_driver * const serial_drivers[] = {
195 /* Config request types */
196 #define REQTYPE_HOST_TO_INTERFACE 0x41
197 #define REQTYPE_INTERFACE_TO_HOST 0xc1
198 #define REQTYPE_HOST_TO_DEVICE 0x40
199 #define REQTYPE_DEVICE_TO_HOST 0xc0
201 /* Config request codes */
202 #define CP210X_IFC_ENABLE 0x00
203 #define CP210X_SET_BAUDDIV 0x01
204 #define CP210X_GET_BAUDDIV 0x02
205 #define CP210X_SET_LINE_CTL 0x03
206 #define CP210X_GET_LINE_CTL 0x04
207 #define CP210X_SET_BREAK 0x05
208 #define CP210X_IMM_CHAR 0x06
209 #define CP210X_SET_MHS 0x07
210 #define CP210X_GET_MDMSTS 0x08
211 #define CP210X_SET_XON 0x09
212 #define CP210X_SET_XOFF 0x0A
213 #define CP210X_SET_EVENTMASK 0x0B
214 #define CP210X_GET_EVENTMASK 0x0C
215 #define CP210X_SET_CHAR 0x0D
216 #define CP210X_GET_CHARS 0x0E
217 #define CP210X_GET_PROPS 0x0F
218 #define CP210X_GET_COMM_STATUS 0x10
219 #define CP210X_RESET 0x11
220 #define CP210X_PURGE 0x12
221 #define CP210X_SET_FLOW 0x13
222 #define CP210X_GET_FLOW 0x14
223 #define CP210X_EMBED_EVENTS 0x15
224 #define CP210X_GET_EVENTSTATE 0x16
225 #define CP210X_SET_CHARS 0x19
226 #define CP210X_GET_BAUDRATE 0x1D
227 #define CP210X_SET_BAUDRATE 0x1E
229 /* CP210X_IFC_ENABLE */
230 #define UART_ENABLE 0x0001
231 #define UART_DISABLE 0x0000
233 /* CP210X_(SET|GET)_BAUDDIV */
234 #define BAUD_RATE_GEN_FREQ 0x384000
236 /* CP210X_(SET|GET)_LINE_CTL */
237 #define BITS_DATA_MASK 0X0f00
238 #define BITS_DATA_5 0X0500
239 #define BITS_DATA_6 0X0600
240 #define BITS_DATA_7 0X0700
241 #define BITS_DATA_8 0X0800
242 #define BITS_DATA_9 0X0900
244 #define BITS_PARITY_MASK 0x00f0
245 #define BITS_PARITY_NONE 0x0000
246 #define BITS_PARITY_ODD 0x0010
247 #define BITS_PARITY_EVEN 0x0020
248 #define BITS_PARITY_MARK 0x0030
249 #define BITS_PARITY_SPACE 0x0040
251 #define BITS_STOP_MASK 0x000f
252 #define BITS_STOP_1 0x0000
253 #define BITS_STOP_1_5 0x0001
254 #define BITS_STOP_2 0x0002
256 /* CP210X_SET_BREAK */
257 #define BREAK_ON 0x0001
258 #define BREAK_OFF 0x0000
260 /* CP210X_(SET_MHS|GET_MDMSTS) */
261 #define CONTROL_DTR 0x0001
262 #define CONTROL_RTS 0x0002
263 #define CONTROL_CTS 0x0010
264 #define CONTROL_DSR 0x0020
265 #define CONTROL_RING 0x0040
266 #define CONTROL_DCD 0x0080
267 #define CONTROL_WRITE_DTR 0x0100
268 #define CONTROL_WRITE_RTS 0x0200
272 * Reads from the CP210x configuration registers
273 * 'size' is specified in bytes.
274 * 'data' is a pointer to a pre-allocated array of integers large
275 * enough to hold 'size' bytes (with 4 bytes to each integer)
277 static int cp210x_get_config(struct usb_serial_port *port, u8 request,
278 unsigned int *data, int size)
280 struct usb_serial *serial = port->serial;
281 struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
283 int result, i, length;
285 /* Number of integers required to contain the array */
286 length = (((size - 1) | 3) + 1)/4;
288 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
290 dev_err(&port->dev, "%s - out of memory.\n", __func__);
294 /* Issue the request, attempting to read 'size' bytes */
295 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
296 request, REQTYPE_INTERFACE_TO_HOST, 0x0000,
297 port_priv->bInterfaceNumber, buf, size,
298 USB_CTRL_GET_TIMEOUT);
300 /* Convert data into an array of integers */
301 for (i = 0; i < length; i++)
302 data[i] = le32_to_cpu(buf[i]);
306 if (result != size) {
307 dbg("%s - Unable to send config request, "
308 "request=0x%x size=%d result=%d",
309 __func__, request, size, result);
321 * Writes to the CP210x configuration registers
322 * Values less than 16 bits wide are sent directly
323 * 'size' is specified in bytes.
325 static int cp210x_set_config(struct usb_serial_port *port, u8 request,
326 unsigned int *data, int size)
328 struct usb_serial *serial = port->serial;
329 struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
331 int result, i, length;
333 /* Number of integers required to contain the array */
334 length = (((size - 1) | 3) + 1)/4;
336 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
338 dev_err(&port->dev, "%s - out of memory.\n",
343 /* Array of integers into bytes */
344 for (i = 0; i < length; i++)
345 buf[i] = cpu_to_le32(data[i]);
348 result = usb_control_msg(serial->dev,
349 usb_sndctrlpipe(serial->dev, 0),
350 request, REQTYPE_HOST_TO_INTERFACE, 0x0000,
351 port_priv->bInterfaceNumber, buf, size,
352 USB_CTRL_SET_TIMEOUT);
354 result = usb_control_msg(serial->dev,
355 usb_sndctrlpipe(serial->dev, 0),
356 request, REQTYPE_HOST_TO_INTERFACE, data[0],
357 port_priv->bInterfaceNumber, NULL, 0,
358 USB_CTRL_SET_TIMEOUT);
363 if ((size > 2 && result != size) || result < 0) {
364 dbg("%s - Unable to send request, "
365 "request=0x%x size=%d result=%d",
366 __func__, request, size, result);
377 * cp210x_set_config_single
378 * Convenience function for calling cp210x_set_config on single data values
379 * without requiring an integer pointer
381 static inline int cp210x_set_config_single(struct usb_serial_port *port,
382 u8 request, unsigned int data)
384 return cp210x_set_config(port, request, &data, 2);
388 * cp210x_quantise_baudrate
389 * Quantises the baud rate as per AN205 Table 1
391 static unsigned int cp210x_quantise_baudrate(unsigned int baud) {
394 else if (baud <= 600) baud = 600;
395 else if (baud <= 1200) baud = 1200;
396 else if (baud <= 1800) baud = 1800;
397 else if (baud <= 2400) baud = 2400;
398 else if (baud <= 4000) baud = 4000;
399 else if (baud <= 4803) baud = 4800;
400 else if (baud <= 7207) baud = 7200;
401 else if (baud <= 9612) baud = 9600;
402 else if (baud <= 14428) baud = 14400;
403 else if (baud <= 16062) baud = 16000;
404 else if (baud <= 19250) baud = 19200;
405 else if (baud <= 28912) baud = 28800;
406 else if (baud <= 38601) baud = 38400;
407 else if (baud <= 51558) baud = 51200;
408 else if (baud <= 56280) baud = 56000;
409 else if (baud <= 58053) baud = 57600;
410 else if (baud <= 64111) baud = 64000;
411 else if (baud <= 77608) baud = 76800;
412 else if (baud <= 117028) baud = 115200;
413 else if (baud <= 129347) baud = 128000;
414 else if (baud <= 156868) baud = 153600;
415 else if (baud <= 237832) baud = 230400;
416 else if (baud <= 254234) baud = 250000;
417 else if (baud <= 273066) baud = 256000;
418 else if (baud <= 491520) baud = 460800;
419 else if (baud <= 567138) baud = 500000;
420 else if (baud <= 670254) baud = 576000;
421 else if (baud < 1000000)
423 else if (baud > 2000000)
428 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
432 result = cp210x_set_config_single(port, CP210X_IFC_ENABLE,
435 dev_err(&port->dev, "%s - Unable to enable UART\n", __func__);
439 /* Configure the termios structure */
440 cp210x_get_termios(tty, port);
442 /* The baud rate must be initialised on cp2104 */
444 cp210x_change_speed(tty, port, NULL);
446 return usb_serial_generic_open(tty, port);
449 static void cp210x_close(struct usb_serial_port *port)
451 usb_serial_generic_close(port);
453 mutex_lock(&port->serial->disc_mutex);
454 if (!port->serial->disconnected)
455 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
456 mutex_unlock(&port->serial->disc_mutex);
461 * Reads the baud rate, data bits, parity, stop bits and flow control mode
462 * from the device, corrects any unsupported values, and configures the
463 * termios structure to reflect the state of the device
465 static void cp210x_get_termios(struct tty_struct *tty,
466 struct usb_serial_port *port)
471 cp210x_get_termios_port(tty->driver_data,
472 &tty->termios.c_cflag, &baud);
473 tty_encode_baud_rate(tty, baud, baud);
479 cp210x_get_termios_port(port, &cflag, &baud);
484 * cp210x_get_termios_port
485 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
487 static void cp210x_get_termios_port(struct usb_serial_port *port,
488 unsigned int *cflagp, unsigned int *baudp)
490 unsigned int cflag, modem_ctl[4];
494 cp210x_get_config(port, CP210X_GET_BAUDRATE, &baud, 4);
496 dbg("%s - baud rate = %d", __func__, baud);
501 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
503 switch (bits & BITS_DATA_MASK) {
505 dbg("%s - data bits = 5", __func__);
509 dbg("%s - data bits = 6", __func__);
513 dbg("%s - data bits = 7", __func__);
517 dbg("%s - data bits = 8", __func__);
521 dbg("%s - data bits = 9 (not supported, using 8 data bits)",
524 bits &= ~BITS_DATA_MASK;
526 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
529 dbg("%s - Unknown number of data bits, using 8", __func__);
531 bits &= ~BITS_DATA_MASK;
533 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
537 switch (bits & BITS_PARITY_MASK) {
538 case BITS_PARITY_NONE:
539 dbg("%s - parity = NONE", __func__);
542 case BITS_PARITY_ODD:
543 dbg("%s - parity = ODD", __func__);
544 cflag |= (PARENB|PARODD);
546 case BITS_PARITY_EVEN:
547 dbg("%s - parity = EVEN", __func__);
551 case BITS_PARITY_MARK:
552 dbg("%s - parity = MARK", __func__);
553 cflag |= (PARENB|PARODD|CMSPAR);
555 case BITS_PARITY_SPACE:
556 dbg("%s - parity = SPACE", __func__);
558 cflag |= (PARENB|CMSPAR);
561 dbg("%s - Unknown parity mode, disabling parity", __func__);
563 bits &= ~BITS_PARITY_MASK;
564 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
569 switch (bits & BITS_STOP_MASK) {
571 dbg("%s - stop bits = 1", __func__);
574 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
576 bits &= ~BITS_STOP_MASK;
577 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
580 dbg("%s - stop bits = 2", __func__);
584 dbg("%s - Unknown number of stop bits, using 1 stop bit",
586 bits &= ~BITS_STOP_MASK;
587 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
591 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
592 if (modem_ctl[0] & 0x0008) {
593 dbg("%s - flow control = CRTSCTS", __func__);
596 dbg("%s - flow control = NONE", __func__);
604 * CP2101 supports the following baud rates:
606 * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800,
607 * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600
609 * CP2102 and CP2103 support the following additional rates:
611 * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000,
614 * The device will map a requested rate to a supported one, but the result
615 * of requests for rates greater than 1053257 is undefined (see AN205).
617 * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud,
618 * respectively, with an error less than 1%. The actual rates are determined
621 * div = round(freq / (2 x prescale x request))
622 * actual = freq / (2 x prescale x div)
624 * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps
626 * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1
629 static void cp210x_change_speed(struct tty_struct *tty,
630 struct usb_serial_port *port, struct ktermios *old_termios)
634 baud = tty->termios.c_ospeed;
636 /* This maps the requested rate to a rate valid on cp2102 or cp2103,
637 * or to an arbitrary rate in [1M,2M].
639 * NOTE: B0 is not implemented.
641 baud = cp210x_quantise_baudrate(baud);
643 dbg("%s - setting baud rate to %u", __func__, baud);
644 if (cp210x_set_config(port, CP210X_SET_BAUDRATE, &baud,
646 dev_warn(&port->dev, "failed to set baud rate to %u\n", baud);
648 baud = old_termios->c_ospeed;
653 tty_encode_baud_rate(tty, baud, baud);
656 static void cp210x_set_termios(struct tty_struct *tty,
657 struct usb_serial_port *port, struct ktermios *old_termios)
659 unsigned int cflag, old_cflag;
661 unsigned int modem_ctl[4];
663 dbg("%s - port %d", __func__, port->number);
668 cflag = tty->termios.c_cflag;
669 old_cflag = old_termios->c_cflag;
671 if (tty->termios.c_ospeed != old_termios->c_ospeed)
672 cp210x_change_speed(tty, port, old_termios);
674 /* If the number of data bits is to be updated */
675 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
676 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
677 bits &= ~BITS_DATA_MASK;
678 switch (cflag & CSIZE) {
681 dbg("%s - data bits = 5", __func__);
685 dbg("%s - data bits = 6", __func__);
689 dbg("%s - data bits = 7", __func__);
693 dbg("%s - data bits = 8", __func__);
697 dbg("%s - data bits = 9", __func__);
700 dbg("cp210x driver does not "
701 "support the number of bits requested,"
702 " using 8 bit mode");
706 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
707 dbg("Number of data bits requested "
708 "not supported by device");
711 if ((cflag & (PARENB|PARODD|CMSPAR)) !=
712 (old_cflag & (PARENB|PARODD|CMSPAR))) {
713 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
714 bits &= ~BITS_PARITY_MASK;
715 if (cflag & PARENB) {
716 if (cflag & CMSPAR) {
717 if (cflag & PARODD) {
718 bits |= BITS_PARITY_MARK;
719 dbg("%s - parity = MARK", __func__);
721 bits |= BITS_PARITY_SPACE;
722 dbg("%s - parity = SPACE", __func__);
725 if (cflag & PARODD) {
726 bits |= BITS_PARITY_ODD;
727 dbg("%s - parity = ODD", __func__);
729 bits |= BITS_PARITY_EVEN;
730 dbg("%s - parity = EVEN", __func__);
734 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
735 dbg("Parity mode not supported by device");
738 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
739 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
740 bits &= ~BITS_STOP_MASK;
741 if (cflag & CSTOPB) {
743 dbg("%s - stop bits = 2", __func__);
746 dbg("%s - stop bits = 1", __func__);
748 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
749 dbg("Number of stop bits requested "
750 "not supported by device");
753 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
754 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
755 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
756 __func__, modem_ctl[0], modem_ctl[1],
757 modem_ctl[2], modem_ctl[3]);
759 if (cflag & CRTSCTS) {
760 modem_ctl[0] &= ~0x7B;
761 modem_ctl[0] |= 0x09;
763 dbg("%s - flow control = CRTSCTS", __func__);
765 modem_ctl[0] &= ~0x7B;
766 modem_ctl[0] |= 0x01;
767 modem_ctl[1] |= 0x40;
768 dbg("%s - flow control = NONE", __func__);
771 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
772 __func__, modem_ctl[0], modem_ctl[1],
773 modem_ctl[2], modem_ctl[3]);
774 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
779 static int cp210x_tiocmset (struct tty_struct *tty,
780 unsigned int set, unsigned int clear)
782 struct usb_serial_port *port = tty->driver_data;
783 return cp210x_tiocmset_port(port, set, clear);
786 static int cp210x_tiocmset_port(struct usb_serial_port *port,
787 unsigned int set, unsigned int clear)
789 unsigned int control = 0;
791 if (set & TIOCM_RTS) {
792 control |= CONTROL_RTS;
793 control |= CONTROL_WRITE_RTS;
795 if (set & TIOCM_DTR) {
796 control |= CONTROL_DTR;
797 control |= CONTROL_WRITE_DTR;
799 if (clear & TIOCM_RTS) {
800 control &= ~CONTROL_RTS;
801 control |= CONTROL_WRITE_RTS;
803 if (clear & TIOCM_DTR) {
804 control &= ~CONTROL_DTR;
805 control |= CONTROL_WRITE_DTR;
808 dbg("%s - control = 0x%.4x", __func__, control);
810 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
813 static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
816 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0);
818 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS);
821 static int cp210x_tiocmget (struct tty_struct *tty)
823 struct usb_serial_port *port = tty->driver_data;
824 unsigned int control;
827 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
829 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
830 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
831 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
832 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
833 |((control & CONTROL_RING)? TIOCM_RI : 0)
834 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
836 dbg("%s - control = 0x%.2x", __func__, control);
841 static void cp210x_break_ctl (struct tty_struct *tty, int break_state)
843 struct usb_serial_port *port = tty->driver_data;
846 if (break_state == 0)
850 dbg("%s - turning break %s", __func__,
851 state == BREAK_OFF ? "off" : "on");
852 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
855 static int cp210x_startup(struct usb_serial *serial)
857 struct cp210x_port_private *port_priv;
860 /* cp210x buffers behave strangely unless device is reset */
861 usb_reset_device(serial->dev);
863 for (i = 0; i < serial->num_ports; i++) {
864 port_priv = kzalloc(sizeof(*port_priv), GFP_KERNEL);
868 memset(port_priv, 0x00, sizeof(*port_priv));
869 port_priv->bInterfaceNumber =
870 serial->interface->cur_altsetting->desc.bInterfaceNumber;
872 usb_set_serial_port_data(serial->port[i], port_priv);
878 static void cp210x_release(struct usb_serial *serial)
880 struct cp210x_port_private *port_priv;
883 for (i = 0; i < serial->num_ports; i++) {
884 port_priv = usb_get_serial_port_data(serial->port[i]);
886 usb_set_serial_port_data(serial->port[i], NULL);
890 module_usb_serial_driver(serial_drivers, id_table);
892 MODULE_DESCRIPTION(DRIVER_DESC);
893 MODULE_VERSION(DRIVER_VERSION);
894 MODULE_LICENSE("GPL");
896 module_param(debug, bool, S_IRUGO | S_IWUSR);
897 MODULE_PARM_DESC(debug, "Enable verbose debugging messages");