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(0x0846, 0x1100) }, /* NetGear Managed Switch M4100 series, M5300 series, M7100 series */
64 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
65 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
66 { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
67 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
68 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
69 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
70 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
71 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
72 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
73 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
74 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
75 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
76 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
77 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
78 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
79 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */
80 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
81 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
82 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
83 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
84 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
85 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
86 { USB_DEVICE(0x10C4, 0x80C4) }, /* Cygnal Integrated Products, Inc., Optris infrared thermometer */
87 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
88 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
89 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
90 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
91 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
92 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
93 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
94 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
95 { USB_DEVICE(0x2405, 0x0003) }, /* West Mountain Radio RIGblaster Advantage */
96 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
97 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
98 { USB_DEVICE(0x10C4, 0x815F) }, /* Timewave HamLinkUSB */
99 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
100 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
101 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
102 { USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */
103 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
104 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
105 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
106 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
107 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
108 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
109 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
110 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
111 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
112 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */
113 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */
114 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
115 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
116 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
117 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
118 { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
119 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
120 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
121 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
122 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
123 { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */
124 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
125 { USB_DEVICE(0x10C4, 0x85F8) }, /* Virtenio Preon32 */
126 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
127 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
128 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
129 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
130 { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */
131 { USB_DEVICE(0x10C4, 0xEA80) }, /* Silicon Labs factory default */
132 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
133 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
134 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
135 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
136 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
137 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
138 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
139 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
140 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
141 { USB_DEVICE(0x166A, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */
142 { USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */
143 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
144 { USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */
145 { USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */
146 { USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */
147 { USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */
148 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
149 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
150 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
151 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
152 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
153 { USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */
154 { USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */
155 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
156 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
157 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
158 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
159 { USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */
160 { USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */
161 { USB_DEVICE(0x1FB9, 0x0100) }, /* Lake Shore Model 121 Current Source */
162 { USB_DEVICE(0x1FB9, 0x0200) }, /* Lake Shore Model 218A Temperature Monitor */
163 { USB_DEVICE(0x1FB9, 0x0201) }, /* Lake Shore Model 219 Temperature Monitor */
164 { USB_DEVICE(0x1FB9, 0x0202) }, /* Lake Shore Model 233 Temperature Transmitter */
165 { USB_DEVICE(0x1FB9, 0x0203) }, /* Lake Shore Model 235 Temperature Transmitter */
166 { USB_DEVICE(0x1FB9, 0x0300) }, /* Lake Shore Model 335 Temperature Controller */
167 { USB_DEVICE(0x1FB9, 0x0301) }, /* Lake Shore Model 336 Temperature Controller */
168 { USB_DEVICE(0x1FB9, 0x0302) }, /* Lake Shore Model 350 Temperature Controller */
169 { USB_DEVICE(0x1FB9, 0x0303) }, /* Lake Shore Model 371 AC Bridge */
170 { USB_DEVICE(0x1FB9, 0x0400) }, /* Lake Shore Model 411 Handheld Gaussmeter */
171 { USB_DEVICE(0x1FB9, 0x0401) }, /* Lake Shore Model 425 Gaussmeter */
172 { USB_DEVICE(0x1FB9, 0x0402) }, /* Lake Shore Model 455A Gaussmeter */
173 { USB_DEVICE(0x1FB9, 0x0403) }, /* Lake Shore Model 475A Gaussmeter */
174 { USB_DEVICE(0x1FB9, 0x0404) }, /* Lake Shore Model 465 Three Axis Gaussmeter */
175 { USB_DEVICE(0x1FB9, 0x0600) }, /* Lake Shore Model 625A Superconducting MPS */
176 { USB_DEVICE(0x1FB9, 0x0601) }, /* Lake Shore Model 642A Magnet Power Supply */
177 { USB_DEVICE(0x1FB9, 0x0602) }, /* Lake Shore Model 648 Magnet Power Supply */
178 { USB_DEVICE(0x1FB9, 0x0700) }, /* Lake Shore Model 737 VSM Controller */
179 { USB_DEVICE(0x1FB9, 0x0701) }, /* Lake Shore Model 776 Hall Matrix */
180 { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */
181 { USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */
182 { USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */
183 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
184 { } /* Terminating Entry */
187 MODULE_DEVICE_TABLE(usb, id_table);
189 struct cp210x_port_private {
190 __u8 bInterfaceNumber;
193 static struct usb_driver cp210x_driver = {
195 .probe = usb_serial_probe,
196 .disconnect = usb_serial_disconnect,
197 .id_table = id_table,
201 static struct usb_serial_driver cp210x_device = {
203 .owner = THIS_MODULE,
206 .usb_driver = &cp210x_driver,
207 .id_table = id_table,
210 .bulk_out_size = 256,
212 .close = cp210x_close,
213 .break_ctl = cp210x_break_ctl,
214 .set_termios = cp210x_set_termios,
215 .tiocmget = cp210x_tiocmget,
216 .tiocmset = cp210x_tiocmset,
217 .attach = cp210x_startup,
218 .release = cp210x_release,
219 .dtr_rts = cp210x_dtr_rts
222 /* Config request types */
223 #define REQTYPE_HOST_TO_DEVICE 0x41
224 #define REQTYPE_DEVICE_TO_HOST 0xc1
226 /* Config request codes */
227 #define CP210X_IFC_ENABLE 0x00
228 #define CP210X_SET_BAUDDIV 0x01
229 #define CP210X_GET_BAUDDIV 0x02
230 #define CP210X_SET_LINE_CTL 0x03
231 #define CP210X_GET_LINE_CTL 0x04
232 #define CP210X_SET_BREAK 0x05
233 #define CP210X_IMM_CHAR 0x06
234 #define CP210X_SET_MHS 0x07
235 #define CP210X_GET_MDMSTS 0x08
236 #define CP210X_SET_XON 0x09
237 #define CP210X_SET_XOFF 0x0A
238 #define CP210X_SET_EVENTMASK 0x0B
239 #define CP210X_GET_EVENTMASK 0x0C
240 #define CP210X_SET_CHAR 0x0D
241 #define CP210X_GET_CHARS 0x0E
242 #define CP210X_GET_PROPS 0x0F
243 #define CP210X_GET_COMM_STATUS 0x10
244 #define CP210X_RESET 0x11
245 #define CP210X_PURGE 0x12
246 #define CP210X_SET_FLOW 0x13
247 #define CP210X_GET_FLOW 0x14
248 #define CP210X_EMBED_EVENTS 0x15
249 #define CP210X_GET_EVENTSTATE 0x16
250 #define CP210X_SET_CHARS 0x19
251 #define CP210X_GET_BAUDRATE 0x1D
252 #define CP210X_SET_BAUDRATE 0x1E
254 /* CP210X_IFC_ENABLE */
255 #define UART_ENABLE 0x0001
256 #define UART_DISABLE 0x0000
258 /* CP210X_(SET|GET)_BAUDDIV */
259 #define BAUD_RATE_GEN_FREQ 0x384000
261 /* CP210X_(SET|GET)_LINE_CTL */
262 #define BITS_DATA_MASK 0X0f00
263 #define BITS_DATA_5 0X0500
264 #define BITS_DATA_6 0X0600
265 #define BITS_DATA_7 0X0700
266 #define BITS_DATA_8 0X0800
267 #define BITS_DATA_9 0X0900
269 #define BITS_PARITY_MASK 0x00f0
270 #define BITS_PARITY_NONE 0x0000
271 #define BITS_PARITY_ODD 0x0010
272 #define BITS_PARITY_EVEN 0x0020
273 #define BITS_PARITY_MARK 0x0030
274 #define BITS_PARITY_SPACE 0x0040
276 #define BITS_STOP_MASK 0x000f
277 #define BITS_STOP_1 0x0000
278 #define BITS_STOP_1_5 0x0001
279 #define BITS_STOP_2 0x0002
281 /* CP210X_SET_BREAK */
282 #define BREAK_ON 0x0001
283 #define BREAK_OFF 0x0000
285 /* CP210X_(SET_MHS|GET_MDMSTS) */
286 #define CONTROL_DTR 0x0001
287 #define CONTROL_RTS 0x0002
288 #define CONTROL_CTS 0x0010
289 #define CONTROL_DSR 0x0020
290 #define CONTROL_RING 0x0040
291 #define CONTROL_DCD 0x0080
292 #define CONTROL_WRITE_DTR 0x0100
293 #define CONTROL_WRITE_RTS 0x0200
297 * Reads from the CP210x configuration registers
298 * 'size' is specified in bytes.
299 * 'data' is a pointer to a pre-allocated array of integers large
300 * enough to hold 'size' bytes (with 4 bytes to each integer)
302 static int cp210x_get_config(struct usb_serial_port *port, u8 request,
303 unsigned int *data, int size)
305 struct usb_serial *serial = port->serial;
306 struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
308 int result, i, length;
310 /* Number of integers required to contain the array */
311 length = (((size - 1) | 3) + 1)/4;
313 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
315 dev_err(&port->dev, "%s - out of memory.\n", __func__);
319 /* Issue the request, attempting to read 'size' bytes */
320 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
321 request, REQTYPE_DEVICE_TO_HOST, 0x0000,
322 port_priv->bInterfaceNumber, buf, size,
323 USB_CTRL_GET_TIMEOUT);
325 /* Convert data into an array of integers */
326 for (i = 0; i < length; i++)
327 data[i] = le32_to_cpu(buf[i]);
331 if (result != size) {
332 dbg("%s - Unable to send config request, "
333 "request=0x%x size=%d result=%d\n",
334 __func__, request, size, result);
343 * Writes to the CP210x configuration registers
344 * Values less than 16 bits wide are sent directly
345 * 'size' is specified in bytes.
347 static int cp210x_set_config(struct usb_serial_port *port, u8 request,
348 unsigned int *data, int size)
350 struct usb_serial *serial = port->serial;
351 struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
353 int result, i, length;
355 /* Number of integers required to contain the array */
356 length = (((size - 1) | 3) + 1)/4;
358 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
360 dev_err(&port->dev, "%s - out of memory.\n",
365 /* Array of integers into bytes */
366 for (i = 0; i < length; i++)
367 buf[i] = cpu_to_le32(data[i]);
370 result = usb_control_msg(serial->dev,
371 usb_sndctrlpipe(serial->dev, 0),
372 request, REQTYPE_HOST_TO_DEVICE, 0x0000,
373 port_priv->bInterfaceNumber, buf, size,
374 USB_CTRL_SET_TIMEOUT);
376 result = usb_control_msg(serial->dev,
377 usb_sndctrlpipe(serial->dev, 0),
378 request, REQTYPE_HOST_TO_DEVICE, data[0],
379 port_priv->bInterfaceNumber, NULL, 0,
380 USB_CTRL_SET_TIMEOUT);
385 if ((size > 2 && result != size) || result < 0) {
386 dbg("%s - Unable to send request, "
387 "request=0x%x size=%d result=%d\n",
388 __func__, request, size, result);
396 * cp210x_set_config_single
397 * Convenience function for calling cp210x_set_config on single data values
398 * without requiring an integer pointer
400 static inline int cp210x_set_config_single(struct usb_serial_port *port,
401 u8 request, unsigned int data)
403 return cp210x_set_config(port, request, &data, 2);
407 * cp210x_quantise_baudrate
408 * Quantises the baud rate as per AN205 Table 1
410 static unsigned int cp210x_quantise_baudrate(unsigned int baud) {
413 else if (baud <= 600) baud = 600;
414 else if (baud <= 1200) baud = 1200;
415 else if (baud <= 1800) baud = 1800;
416 else if (baud <= 2400) baud = 2400;
417 else if (baud <= 4000) baud = 4000;
418 else if (baud <= 4803) baud = 4800;
419 else if (baud <= 7207) baud = 7200;
420 else if (baud <= 9612) baud = 9600;
421 else if (baud <= 14428) baud = 14400;
422 else if (baud <= 16062) baud = 16000;
423 else if (baud <= 19250) baud = 19200;
424 else if (baud <= 28912) baud = 28800;
425 else if (baud <= 38601) baud = 38400;
426 else if (baud <= 51558) baud = 51200;
427 else if (baud <= 56280) baud = 56000;
428 else if (baud <= 58053) baud = 57600;
429 else if (baud <= 64111) baud = 64000;
430 else if (baud <= 77608) baud = 76800;
431 else if (baud <= 117028) baud = 115200;
432 else if (baud <= 129347) baud = 128000;
433 else if (baud <= 156868) baud = 153600;
434 else if (baud <= 237832) baud = 230400;
435 else if (baud <= 254234) baud = 250000;
436 else if (baud <= 273066) baud = 256000;
437 else if (baud <= 491520) baud = 460800;
438 else if (baud <= 567138) baud = 500000;
439 else if (baud <= 670254) baud = 576000;
440 else if (baud < 1000000)
442 else if (baud > 2000000)
447 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
449 dbg("%s - port %d", __func__, port->number);
451 if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) {
452 dev_err(&port->dev, "%s - Unable to enable UART\n",
457 /* Configure the termios structure */
458 cp210x_get_termios(tty, port);
460 /* The baud rate must be initialised on cp2104 */
462 cp210x_change_speed(tty, port, NULL);
464 return usb_serial_generic_open(tty, port);
467 static void cp210x_close(struct usb_serial_port *port)
469 dbg("%s - port %d", __func__, port->number);
471 usb_serial_generic_close(port);
473 mutex_lock(&port->serial->disc_mutex);
474 if (!port->serial->disconnected)
475 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
476 mutex_unlock(&port->serial->disc_mutex);
481 * Reads the baud rate, data bits, parity, stop bits and flow control mode
482 * from the device, corrects any unsupported values, and configures the
483 * termios structure to reflect the state of the device
485 static void cp210x_get_termios(struct tty_struct *tty,
486 struct usb_serial_port *port)
491 cp210x_get_termios_port(tty->driver_data,
492 &tty->termios->c_cflag, &baud);
493 tty_encode_baud_rate(tty, baud, baud);
499 cp210x_get_termios_port(port, &cflag, &baud);
504 * cp210x_get_termios_port
505 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
507 static void cp210x_get_termios_port(struct usb_serial_port *port,
508 unsigned int *cflagp, unsigned int *baudp)
510 unsigned int cflag, modem_ctl[4];
514 dbg("%s - port %d", __func__, port->number);
516 cp210x_get_config(port, CP210X_GET_BAUDRATE, &baud, 4);
518 dbg("%s - baud rate = %d", __func__, baud);
523 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
525 switch (bits & BITS_DATA_MASK) {
527 dbg("%s - data bits = 5", __func__);
531 dbg("%s - data bits = 6", __func__);
535 dbg("%s - data bits = 7", __func__);
539 dbg("%s - data bits = 8", __func__);
543 dbg("%s - data bits = 9 (not supported, using 8 data bits)",
546 bits &= ~BITS_DATA_MASK;
548 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
551 dbg("%s - Unknown number of data bits, using 8", __func__);
553 bits &= ~BITS_DATA_MASK;
555 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
559 switch (bits & BITS_PARITY_MASK) {
560 case BITS_PARITY_NONE:
561 dbg("%s - parity = NONE", __func__);
564 case BITS_PARITY_ODD:
565 dbg("%s - parity = ODD", __func__);
566 cflag |= (PARENB|PARODD);
568 case BITS_PARITY_EVEN:
569 dbg("%s - parity = EVEN", __func__);
573 case BITS_PARITY_MARK:
574 dbg("%s - parity = MARK (not supported, disabling parity)",
577 bits &= ~BITS_PARITY_MASK;
578 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
580 case BITS_PARITY_SPACE:
581 dbg("%s - parity = SPACE (not supported, disabling parity)",
584 bits &= ~BITS_PARITY_MASK;
585 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
588 dbg("%s - Unknown parity mode, disabling parity", __func__);
590 bits &= ~BITS_PARITY_MASK;
591 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
596 switch (bits & BITS_STOP_MASK) {
598 dbg("%s - stop bits = 1", __func__);
601 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
603 bits &= ~BITS_STOP_MASK;
604 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
607 dbg("%s - stop bits = 2", __func__);
611 dbg("%s - Unknown number of stop bits, using 1 stop bit",
613 bits &= ~BITS_STOP_MASK;
614 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
618 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
619 if (modem_ctl[0] & 0x0008) {
620 dbg("%s - flow control = CRTSCTS", __func__);
623 dbg("%s - flow control = NONE", __func__);
631 * CP2101 supports the following baud rates:
633 * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800,
634 * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600
636 * CP2102 and CP2103 support the following additional rates:
638 * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000,
641 * The device will map a requested rate to a supported one, but the result
642 * of requests for rates greater than 1053257 is undefined (see AN205).
644 * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud,
645 * respectively, with an error less than 1%. The actual rates are determined
648 * div = round(freq / (2 x prescale x request))
649 * actual = freq / (2 x prescale x div)
651 * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps
653 * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1
656 static void cp210x_change_speed(struct tty_struct *tty,
657 struct usb_serial_port *port, struct ktermios *old_termios)
661 baud = tty->termios->c_ospeed;
663 /* This maps the requested rate to a rate valid on cp2102 or cp2103,
664 * or to an arbitrary rate in [1M,2M].
666 * NOTE: B0 is not implemented.
668 baud = cp210x_quantise_baudrate(baud);
670 dbg("%s - setting baud rate to %u", __func__, baud);
671 if (cp210x_set_config(port, CP210X_SET_BAUDRATE, &baud,
673 dev_warn(&port->dev, "failed to set baud rate to %u\n", baud);
675 baud = old_termios->c_ospeed;
680 tty_encode_baud_rate(tty, baud, baud);
683 static void cp210x_set_termios(struct tty_struct *tty,
684 struct usb_serial_port *port, struct ktermios *old_termios)
686 unsigned int cflag, old_cflag;
688 unsigned int modem_ctl[4];
690 dbg("%s - port %d", __func__, port->number);
695 tty->termios->c_cflag &= ~CMSPAR;
696 cflag = tty->termios->c_cflag;
697 old_cflag = old_termios->c_cflag;
699 if (tty->termios->c_ospeed != old_termios->c_ospeed)
700 cp210x_change_speed(tty, port, old_termios);
702 /* If the number of data bits is to be updated */
703 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
704 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
705 bits &= ~BITS_DATA_MASK;
706 switch (cflag & CSIZE) {
709 dbg("%s - data bits = 5", __func__);
713 dbg("%s - data bits = 6", __func__);
717 dbg("%s - data bits = 7", __func__);
721 dbg("%s - data bits = 8", __func__);
725 dbg("%s - data bits = 9", __func__);
728 dbg("cp210x driver does not "
729 "support the number of bits requested,"
730 " using 8 bit mode\n");
734 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
735 dbg("Number of data bits requested "
736 "not supported by device\n");
739 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
740 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
741 bits &= ~BITS_PARITY_MASK;
742 if (cflag & PARENB) {
743 if (cflag & PARODD) {
744 bits |= BITS_PARITY_ODD;
745 dbg("%s - parity = ODD", __func__);
747 bits |= BITS_PARITY_EVEN;
748 dbg("%s - parity = EVEN", __func__);
751 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
752 dbg("Parity mode not supported "
756 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
757 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
758 bits &= ~BITS_STOP_MASK;
759 if (cflag & CSTOPB) {
761 dbg("%s - stop bits = 2", __func__);
764 dbg("%s - stop bits = 1", __func__);
766 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
767 dbg("Number of stop bits requested "
768 "not supported by device\n");
771 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
772 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
773 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
774 __func__, modem_ctl[0], modem_ctl[1],
775 modem_ctl[2], modem_ctl[3]);
777 if (cflag & CRTSCTS) {
778 modem_ctl[0] &= ~0x7B;
779 modem_ctl[0] |= 0x09;
781 dbg("%s - flow control = CRTSCTS", __func__);
783 modem_ctl[0] &= ~0x7B;
784 modem_ctl[0] |= 0x01;
785 modem_ctl[1] |= 0x40;
786 dbg("%s - flow control = NONE", __func__);
789 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
790 __func__, modem_ctl[0], modem_ctl[1],
791 modem_ctl[2], modem_ctl[3]);
792 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
797 static int cp210x_tiocmset (struct tty_struct *tty,
798 unsigned int set, unsigned int clear)
800 struct usb_serial_port *port = tty->driver_data;
801 return cp210x_tiocmset_port(port, set, clear);
804 static int cp210x_tiocmset_port(struct usb_serial_port *port,
805 unsigned int set, unsigned int clear)
807 unsigned int control = 0;
809 dbg("%s - port %d", __func__, port->number);
811 if (set & TIOCM_RTS) {
812 control |= CONTROL_RTS;
813 control |= CONTROL_WRITE_RTS;
815 if (set & TIOCM_DTR) {
816 control |= CONTROL_DTR;
817 control |= CONTROL_WRITE_DTR;
819 if (clear & TIOCM_RTS) {
820 control &= ~CONTROL_RTS;
821 control |= CONTROL_WRITE_RTS;
823 if (clear & TIOCM_DTR) {
824 control &= ~CONTROL_DTR;
825 control |= CONTROL_WRITE_DTR;
828 dbg("%s - control = 0x%.4x", __func__, control);
830 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
833 static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
836 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0);
838 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS);
841 static int cp210x_tiocmget (struct tty_struct *tty)
843 struct usb_serial_port *port = tty->driver_data;
844 unsigned int control;
847 dbg("%s - port %d", __func__, port->number);
849 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
851 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
852 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
853 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
854 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
855 |((control & CONTROL_RING)? TIOCM_RI : 0)
856 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
858 dbg("%s - control = 0x%.2x", __func__, control);
863 static void cp210x_break_ctl (struct tty_struct *tty, int break_state)
865 struct usb_serial_port *port = tty->driver_data;
868 dbg("%s - port %d", __func__, port->number);
869 if (break_state == 0)
873 dbg("%s - turning break %s", __func__,
874 state == BREAK_OFF ? "off" : "on");
875 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
878 static int cp210x_startup(struct usb_serial *serial)
880 struct cp210x_port_private *port_priv;
883 /* cp210x buffers behave strangely unless device is reset */
884 usb_reset_device(serial->dev);
886 for (i = 0; i < serial->num_ports; i++) {
887 port_priv = kzalloc(sizeof(*port_priv), GFP_KERNEL);
891 memset(port_priv, 0x00, sizeof(*port_priv));
892 port_priv->bInterfaceNumber =
893 serial->interface->cur_altsetting->desc.bInterfaceNumber;
895 usb_set_serial_port_data(serial->port[i], port_priv);
901 static void cp210x_release(struct usb_serial *serial)
903 struct cp210x_port_private *port_priv;
906 for (i = 0; i < serial->num_ports; i++) {
907 port_priv = usb_get_serial_port_data(serial->port[i]);
909 usb_set_serial_port_data(serial->port[i], NULL);
913 static int __init cp210x_init(void)
917 retval = usb_serial_register(&cp210x_device);
919 return retval; /* Failed to register */
921 retval = usb_register(&cp210x_driver);
923 /* Failed to register */
924 usb_serial_deregister(&cp210x_device);
929 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
934 static void __exit cp210x_exit(void)
936 usb_deregister(&cp210x_driver);
937 usb_serial_deregister(&cp210x_device);
940 module_init(cp210x_init);
941 module_exit(cp210x_exit);
943 MODULE_DESCRIPTION(DRIVER_DESC);
944 MODULE_VERSION(DRIVER_VERSION);
945 MODULE_LICENSE("GPL");
947 module_param(debug, bool, S_IRUGO | S_IWUSR);
948 MODULE_PARM_DESC(debug, "Enable verbose debugging messages");