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, 0x8281) }, /* Nanotec Plug & Drive */
114 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */
115 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
116 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
117 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
118 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
119 { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
120 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
121 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
122 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
123 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
124 { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */
125 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
126 { USB_DEVICE(0x10C4, 0x85F8) }, /* Virtenio Preon32 */
127 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
128 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
129 { USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */
130 { USB_DEVICE(0x10C4, 0x88A5) }, /* Planet Innovation Ingeni ZigBee USB Device */
131 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
132 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
133 { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */
134 { USB_DEVICE(0x10C4, 0xEA80) }, /* Silicon Labs factory default */
135 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
136 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
137 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
138 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
139 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
140 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
141 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
142 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
143 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
144 { USB_DEVICE(0x166A, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */
145 { USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */
146 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
147 { USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */
148 { USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */
149 { USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */
150 { USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */
151 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
152 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
153 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
154 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
155 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
156 { USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */
157 { USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */
158 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
159 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
160 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
161 { USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */
162 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
163 { USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */
164 { USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */
165 { USB_DEVICE(0x1FB9, 0x0100) }, /* Lake Shore Model 121 Current Source */
166 { USB_DEVICE(0x1FB9, 0x0200) }, /* Lake Shore Model 218A Temperature Monitor */
167 { USB_DEVICE(0x1FB9, 0x0201) }, /* Lake Shore Model 219 Temperature Monitor */
168 { USB_DEVICE(0x1FB9, 0x0202) }, /* Lake Shore Model 233 Temperature Transmitter */
169 { USB_DEVICE(0x1FB9, 0x0203) }, /* Lake Shore Model 235 Temperature Transmitter */
170 { USB_DEVICE(0x1FB9, 0x0300) }, /* Lake Shore Model 335 Temperature Controller */
171 { USB_DEVICE(0x1FB9, 0x0301) }, /* Lake Shore Model 336 Temperature Controller */
172 { USB_DEVICE(0x1FB9, 0x0302) }, /* Lake Shore Model 350 Temperature Controller */
173 { USB_DEVICE(0x1FB9, 0x0303) }, /* Lake Shore Model 371 AC Bridge */
174 { USB_DEVICE(0x1FB9, 0x0400) }, /* Lake Shore Model 411 Handheld Gaussmeter */
175 { USB_DEVICE(0x1FB9, 0x0401) }, /* Lake Shore Model 425 Gaussmeter */
176 { USB_DEVICE(0x1FB9, 0x0402) }, /* Lake Shore Model 455A Gaussmeter */
177 { USB_DEVICE(0x1FB9, 0x0403) }, /* Lake Shore Model 475A Gaussmeter */
178 { USB_DEVICE(0x1FB9, 0x0404) }, /* Lake Shore Model 465 Three Axis Gaussmeter */
179 { USB_DEVICE(0x1FB9, 0x0600) }, /* Lake Shore Model 625A Superconducting MPS */
180 { USB_DEVICE(0x1FB9, 0x0601) }, /* Lake Shore Model 642A Magnet Power Supply */
181 { USB_DEVICE(0x1FB9, 0x0602) }, /* Lake Shore Model 648 Magnet Power Supply */
182 { USB_DEVICE(0x1FB9, 0x0700) }, /* Lake Shore Model 737 VSM Controller */
183 { USB_DEVICE(0x1FB9, 0x0701) }, /* Lake Shore Model 776 Hall Matrix */
184 { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */
185 { USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */
186 { USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */
187 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
188 { } /* Terminating Entry */
191 MODULE_DEVICE_TABLE(usb, id_table);
193 struct cp210x_port_private {
194 __u8 bInterfaceNumber;
197 static struct usb_driver cp210x_driver = {
199 .probe = usb_serial_probe,
200 .disconnect = usb_serial_disconnect,
201 .id_table = id_table,
205 static struct usb_serial_driver cp210x_device = {
207 .owner = THIS_MODULE,
210 .usb_driver = &cp210x_driver,
211 .id_table = id_table,
214 .bulk_out_size = 256,
216 .close = cp210x_close,
217 .break_ctl = cp210x_break_ctl,
218 .set_termios = cp210x_set_termios,
219 .tiocmget = cp210x_tiocmget,
220 .tiocmset = cp210x_tiocmset,
221 .attach = cp210x_startup,
222 .release = cp210x_release,
223 .dtr_rts = cp210x_dtr_rts
226 /* Config request types */
227 #define REQTYPE_HOST_TO_DEVICE 0x41
228 #define REQTYPE_DEVICE_TO_HOST 0xc1
230 /* Config request codes */
231 #define CP210X_IFC_ENABLE 0x00
232 #define CP210X_SET_BAUDDIV 0x01
233 #define CP210X_GET_BAUDDIV 0x02
234 #define CP210X_SET_LINE_CTL 0x03
235 #define CP210X_GET_LINE_CTL 0x04
236 #define CP210X_SET_BREAK 0x05
237 #define CP210X_IMM_CHAR 0x06
238 #define CP210X_SET_MHS 0x07
239 #define CP210X_GET_MDMSTS 0x08
240 #define CP210X_SET_XON 0x09
241 #define CP210X_SET_XOFF 0x0A
242 #define CP210X_SET_EVENTMASK 0x0B
243 #define CP210X_GET_EVENTMASK 0x0C
244 #define CP210X_SET_CHAR 0x0D
245 #define CP210X_GET_CHARS 0x0E
246 #define CP210X_GET_PROPS 0x0F
247 #define CP210X_GET_COMM_STATUS 0x10
248 #define CP210X_RESET 0x11
249 #define CP210X_PURGE 0x12
250 #define CP210X_SET_FLOW 0x13
251 #define CP210X_GET_FLOW 0x14
252 #define CP210X_EMBED_EVENTS 0x15
253 #define CP210X_GET_EVENTSTATE 0x16
254 #define CP210X_SET_CHARS 0x19
255 #define CP210X_GET_BAUDRATE 0x1D
256 #define CP210X_SET_BAUDRATE 0x1E
258 /* CP210X_IFC_ENABLE */
259 #define UART_ENABLE 0x0001
260 #define UART_DISABLE 0x0000
262 /* CP210X_(SET|GET)_BAUDDIV */
263 #define BAUD_RATE_GEN_FREQ 0x384000
265 /* CP210X_(SET|GET)_LINE_CTL */
266 #define BITS_DATA_MASK 0X0f00
267 #define BITS_DATA_5 0X0500
268 #define BITS_DATA_6 0X0600
269 #define BITS_DATA_7 0X0700
270 #define BITS_DATA_8 0X0800
271 #define BITS_DATA_9 0X0900
273 #define BITS_PARITY_MASK 0x00f0
274 #define BITS_PARITY_NONE 0x0000
275 #define BITS_PARITY_ODD 0x0010
276 #define BITS_PARITY_EVEN 0x0020
277 #define BITS_PARITY_MARK 0x0030
278 #define BITS_PARITY_SPACE 0x0040
280 #define BITS_STOP_MASK 0x000f
281 #define BITS_STOP_1 0x0000
282 #define BITS_STOP_1_5 0x0001
283 #define BITS_STOP_2 0x0002
285 /* CP210X_SET_BREAK */
286 #define BREAK_ON 0x0001
287 #define BREAK_OFF 0x0000
289 /* CP210X_(SET_MHS|GET_MDMSTS) */
290 #define CONTROL_DTR 0x0001
291 #define CONTROL_RTS 0x0002
292 #define CONTROL_CTS 0x0010
293 #define CONTROL_DSR 0x0020
294 #define CONTROL_RING 0x0040
295 #define CONTROL_DCD 0x0080
296 #define CONTROL_WRITE_DTR 0x0100
297 #define CONTROL_WRITE_RTS 0x0200
301 * Reads from the CP210x configuration registers
302 * 'size' is specified in bytes.
303 * 'data' is a pointer to a pre-allocated array of integers large
304 * enough to hold 'size' bytes (with 4 bytes to each integer)
306 static int cp210x_get_config(struct usb_serial_port *port, u8 request,
307 unsigned int *data, int size)
309 struct usb_serial *serial = port->serial;
310 struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
312 int result, i, length;
314 /* Number of integers required to contain the array */
315 length = (((size - 1) | 3) + 1)/4;
317 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
319 dev_err(&port->dev, "%s - out of memory.\n", __func__);
323 /* Issue the request, attempting to read 'size' bytes */
324 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
325 request, REQTYPE_DEVICE_TO_HOST, 0x0000,
326 port_priv->bInterfaceNumber, buf, size,
327 USB_CTRL_GET_TIMEOUT);
329 /* Convert data into an array of integers */
330 for (i = 0; i < length; i++)
331 data[i] = le32_to_cpu(buf[i]);
335 if (result != size) {
336 dbg("%s - Unable to send config request, "
337 "request=0x%x size=%d result=%d\n",
338 __func__, request, size, result);
347 * Writes to the CP210x configuration registers
348 * Values less than 16 bits wide are sent directly
349 * 'size' is specified in bytes.
351 static int cp210x_set_config(struct usb_serial_port *port, u8 request,
352 unsigned int *data, int size)
354 struct usb_serial *serial = port->serial;
355 struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
357 int result, i, length;
359 /* Number of integers required to contain the array */
360 length = (((size - 1) | 3) + 1)/4;
362 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
364 dev_err(&port->dev, "%s - out of memory.\n",
369 /* Array of integers into bytes */
370 for (i = 0; i < length; i++)
371 buf[i] = cpu_to_le32(data[i]);
374 result = usb_control_msg(serial->dev,
375 usb_sndctrlpipe(serial->dev, 0),
376 request, REQTYPE_HOST_TO_DEVICE, 0x0000,
377 port_priv->bInterfaceNumber, buf, size,
378 USB_CTRL_SET_TIMEOUT);
380 result = usb_control_msg(serial->dev,
381 usb_sndctrlpipe(serial->dev, 0),
382 request, REQTYPE_HOST_TO_DEVICE, data[0],
383 port_priv->bInterfaceNumber, NULL, 0,
384 USB_CTRL_SET_TIMEOUT);
389 if ((size > 2 && result != size) || result < 0) {
390 dbg("%s - Unable to send request, "
391 "request=0x%x size=%d result=%d\n",
392 __func__, request, size, result);
400 * cp210x_set_config_single
401 * Convenience function for calling cp210x_set_config on single data values
402 * without requiring an integer pointer
404 static inline int cp210x_set_config_single(struct usb_serial_port *port,
405 u8 request, unsigned int data)
407 return cp210x_set_config(port, request, &data, 2);
411 * cp210x_quantise_baudrate
412 * Quantises the baud rate as per AN205 Table 1
414 static unsigned int cp210x_quantise_baudrate(unsigned int baud) {
417 else if (baud <= 600) baud = 600;
418 else if (baud <= 1200) baud = 1200;
419 else if (baud <= 1800) baud = 1800;
420 else if (baud <= 2400) baud = 2400;
421 else if (baud <= 4000) baud = 4000;
422 else if (baud <= 4803) baud = 4800;
423 else if (baud <= 7207) baud = 7200;
424 else if (baud <= 9612) baud = 9600;
425 else if (baud <= 14428) baud = 14400;
426 else if (baud <= 16062) baud = 16000;
427 else if (baud <= 19250) baud = 19200;
428 else if (baud <= 28912) baud = 28800;
429 else if (baud <= 38601) baud = 38400;
430 else if (baud <= 51558) baud = 51200;
431 else if (baud <= 56280) baud = 56000;
432 else if (baud <= 58053) baud = 57600;
433 else if (baud <= 64111) baud = 64000;
434 else if (baud <= 77608) baud = 76800;
435 else if (baud <= 117028) baud = 115200;
436 else if (baud <= 129347) baud = 128000;
437 else if (baud <= 156868) baud = 153600;
438 else if (baud <= 237832) baud = 230400;
439 else if (baud <= 254234) baud = 250000;
440 else if (baud <= 273066) baud = 256000;
441 else if (baud <= 491520) baud = 460800;
442 else if (baud <= 567138) baud = 500000;
443 else if (baud <= 670254) baud = 576000;
444 else if (baud < 1000000)
446 else if (baud > 2000000)
451 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
453 dbg("%s - port %d", __func__, port->number);
455 if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) {
456 dev_err(&port->dev, "%s - Unable to enable UART\n",
461 /* Configure the termios structure */
462 cp210x_get_termios(tty, port);
464 /* The baud rate must be initialised on cp2104 */
466 cp210x_change_speed(tty, port, NULL);
468 return usb_serial_generic_open(tty, port);
471 static void cp210x_close(struct usb_serial_port *port)
473 dbg("%s - port %d", __func__, port->number);
475 usb_serial_generic_close(port);
477 mutex_lock(&port->serial->disc_mutex);
478 if (!port->serial->disconnected)
479 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
480 mutex_unlock(&port->serial->disc_mutex);
485 * Reads the baud rate, data bits, parity, stop bits and flow control mode
486 * from the device, corrects any unsupported values, and configures the
487 * termios structure to reflect the state of the device
489 static void cp210x_get_termios(struct tty_struct *tty,
490 struct usb_serial_port *port)
495 cp210x_get_termios_port(tty->driver_data,
496 &tty->termios->c_cflag, &baud);
497 tty_encode_baud_rate(tty, baud, baud);
503 cp210x_get_termios_port(port, &cflag, &baud);
508 * cp210x_get_termios_port
509 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
511 static void cp210x_get_termios_port(struct usb_serial_port *port,
512 unsigned int *cflagp, unsigned int *baudp)
514 unsigned int cflag, modem_ctl[4];
518 dbg("%s - port %d", __func__, port->number);
520 cp210x_get_config(port, CP210X_GET_BAUDRATE, &baud, 4);
522 dbg("%s - baud rate = %d", __func__, baud);
527 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
529 switch (bits & BITS_DATA_MASK) {
531 dbg("%s - data bits = 5", __func__);
535 dbg("%s - data bits = 6", __func__);
539 dbg("%s - data bits = 7", __func__);
543 dbg("%s - data bits = 8", __func__);
547 dbg("%s - data bits = 9 (not supported, using 8 data bits)",
550 bits &= ~BITS_DATA_MASK;
552 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
555 dbg("%s - Unknown number of data bits, using 8", __func__);
557 bits &= ~BITS_DATA_MASK;
559 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
563 switch (bits & BITS_PARITY_MASK) {
564 case BITS_PARITY_NONE:
565 dbg("%s - parity = NONE", __func__);
568 case BITS_PARITY_ODD:
569 dbg("%s - parity = ODD", __func__);
570 cflag |= (PARENB|PARODD);
572 case BITS_PARITY_EVEN:
573 dbg("%s - parity = EVEN", __func__);
577 case BITS_PARITY_MARK:
578 dbg("%s - parity = MARK (not supported, disabling parity)",
581 bits &= ~BITS_PARITY_MASK;
582 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
584 case BITS_PARITY_SPACE:
585 dbg("%s - parity = SPACE (not supported, disabling parity)",
588 bits &= ~BITS_PARITY_MASK;
589 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
592 dbg("%s - Unknown parity mode, disabling parity", __func__);
594 bits &= ~BITS_PARITY_MASK;
595 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
600 switch (bits & BITS_STOP_MASK) {
602 dbg("%s - stop bits = 1", __func__);
605 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
607 bits &= ~BITS_STOP_MASK;
608 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
611 dbg("%s - stop bits = 2", __func__);
615 dbg("%s - Unknown number of stop bits, using 1 stop bit",
617 bits &= ~BITS_STOP_MASK;
618 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
622 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
623 if (modem_ctl[0] & 0x0008) {
624 dbg("%s - flow control = CRTSCTS", __func__);
627 dbg("%s - flow control = NONE", __func__);
635 * CP2101 supports the following baud rates:
637 * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800,
638 * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600
640 * CP2102 and CP2103 support the following additional rates:
642 * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000,
645 * The device will map a requested rate to a supported one, but the result
646 * of requests for rates greater than 1053257 is undefined (see AN205).
648 * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud,
649 * respectively, with an error less than 1%. The actual rates are determined
652 * div = round(freq / (2 x prescale x request))
653 * actual = freq / (2 x prescale x div)
655 * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps
657 * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1
660 static void cp210x_change_speed(struct tty_struct *tty,
661 struct usb_serial_port *port, struct ktermios *old_termios)
665 baud = tty->termios->c_ospeed;
667 /* This maps the requested rate to a rate valid on cp2102 or cp2103,
668 * or to an arbitrary rate in [1M,2M].
670 * NOTE: B0 is not implemented.
672 baud = cp210x_quantise_baudrate(baud);
674 dbg("%s - setting baud rate to %u", __func__, baud);
675 if (cp210x_set_config(port, CP210X_SET_BAUDRATE, &baud,
677 dev_warn(&port->dev, "failed to set baud rate to %u\n", baud);
679 baud = old_termios->c_ospeed;
684 tty_encode_baud_rate(tty, baud, baud);
687 static void cp210x_set_termios(struct tty_struct *tty,
688 struct usb_serial_port *port, struct ktermios *old_termios)
690 unsigned int cflag, old_cflag;
692 unsigned int modem_ctl[4];
694 dbg("%s - port %d", __func__, port->number);
699 tty->termios->c_cflag &= ~CMSPAR;
700 cflag = tty->termios->c_cflag;
701 old_cflag = old_termios->c_cflag;
703 if (tty->termios->c_ospeed != old_termios->c_ospeed)
704 cp210x_change_speed(tty, port, old_termios);
706 /* If the number of data bits is to be updated */
707 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
708 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
709 bits &= ~BITS_DATA_MASK;
710 switch (cflag & CSIZE) {
713 dbg("%s - data bits = 5", __func__);
717 dbg("%s - data bits = 6", __func__);
721 dbg("%s - data bits = 7", __func__);
725 dbg("%s - data bits = 8", __func__);
729 dbg("%s - data bits = 9", __func__);
732 dbg("cp210x driver does not "
733 "support the number of bits requested,"
734 " using 8 bit mode\n");
738 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
739 dbg("Number of data bits requested "
740 "not supported by device\n");
743 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
744 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
745 bits &= ~BITS_PARITY_MASK;
746 if (cflag & PARENB) {
747 if (cflag & PARODD) {
748 bits |= BITS_PARITY_ODD;
749 dbg("%s - parity = ODD", __func__);
751 bits |= BITS_PARITY_EVEN;
752 dbg("%s - parity = EVEN", __func__);
755 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
756 dbg("Parity mode not supported "
760 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
761 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
762 bits &= ~BITS_STOP_MASK;
763 if (cflag & CSTOPB) {
765 dbg("%s - stop bits = 2", __func__);
768 dbg("%s - stop bits = 1", __func__);
770 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
771 dbg("Number of stop bits requested "
772 "not supported by device\n");
775 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
776 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
777 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
778 __func__, modem_ctl[0], modem_ctl[1],
779 modem_ctl[2], modem_ctl[3]);
781 if (cflag & CRTSCTS) {
782 modem_ctl[0] &= ~0x7B;
783 modem_ctl[0] |= 0x09;
785 dbg("%s - flow control = CRTSCTS", __func__);
787 modem_ctl[0] &= ~0x7B;
788 modem_ctl[0] |= 0x01;
789 modem_ctl[1] |= 0x40;
790 dbg("%s - flow control = NONE", __func__);
793 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
794 __func__, modem_ctl[0], modem_ctl[1],
795 modem_ctl[2], modem_ctl[3]);
796 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
801 static int cp210x_tiocmset (struct tty_struct *tty,
802 unsigned int set, unsigned int clear)
804 struct usb_serial_port *port = tty->driver_data;
805 return cp210x_tiocmset_port(port, set, clear);
808 static int cp210x_tiocmset_port(struct usb_serial_port *port,
809 unsigned int set, unsigned int clear)
811 unsigned int control = 0;
813 dbg("%s - port %d", __func__, port->number);
815 if (set & TIOCM_RTS) {
816 control |= CONTROL_RTS;
817 control |= CONTROL_WRITE_RTS;
819 if (set & TIOCM_DTR) {
820 control |= CONTROL_DTR;
821 control |= CONTROL_WRITE_DTR;
823 if (clear & TIOCM_RTS) {
824 control &= ~CONTROL_RTS;
825 control |= CONTROL_WRITE_RTS;
827 if (clear & TIOCM_DTR) {
828 control &= ~CONTROL_DTR;
829 control |= CONTROL_WRITE_DTR;
832 dbg("%s - control = 0x%.4x", __func__, control);
834 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
837 static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
840 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0);
842 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS);
845 static int cp210x_tiocmget (struct tty_struct *tty)
847 struct usb_serial_port *port = tty->driver_data;
848 unsigned int control;
851 dbg("%s - port %d", __func__, port->number);
853 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
855 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
856 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
857 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
858 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
859 |((control & CONTROL_RING)? TIOCM_RI : 0)
860 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
862 dbg("%s - control = 0x%.2x", __func__, control);
867 static void cp210x_break_ctl (struct tty_struct *tty, int break_state)
869 struct usb_serial_port *port = tty->driver_data;
872 dbg("%s - port %d", __func__, port->number);
873 if (break_state == 0)
877 dbg("%s - turning break %s", __func__,
878 state == BREAK_OFF ? "off" : "on");
879 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
882 static int cp210x_startup(struct usb_serial *serial)
884 struct cp210x_port_private *port_priv;
887 /* cp210x buffers behave strangely unless device is reset */
888 usb_reset_device(serial->dev);
890 for (i = 0; i < serial->num_ports; i++) {
891 port_priv = kzalloc(sizeof(*port_priv), GFP_KERNEL);
895 memset(port_priv, 0x00, sizeof(*port_priv));
896 port_priv->bInterfaceNumber =
897 serial->interface->cur_altsetting->desc.bInterfaceNumber;
899 usb_set_serial_port_data(serial->port[i], port_priv);
905 static void cp210x_release(struct usb_serial *serial)
907 struct cp210x_port_private *port_priv;
910 for (i = 0; i < serial->num_ports; i++) {
911 port_priv = usb_get_serial_port_data(serial->port[i]);
913 usb_set_serial_port_data(serial->port[i], NULL);
917 static int __init cp210x_init(void)
921 retval = usb_serial_register(&cp210x_device);
923 return retval; /* Failed to register */
925 retval = usb_register(&cp210x_driver);
927 /* Failed to register */
928 usb_serial_deregister(&cp210x_device);
933 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
938 static void __exit cp210x_exit(void)
940 usb_deregister(&cp210x_driver);
941 usb_serial_deregister(&cp210x_device);
944 module_init(cp210x_init);
945 module_exit(cp210x_exit);
947 MODULE_DESCRIPTION(DRIVER_DESC);
948 MODULE_VERSION(DRIVER_VERSION);
949 MODULE_LICENSE("GPL");
951 module_param(debug, bool, S_IRUGO | S_IWUSR);
952 MODULE_PARM_DESC(debug, "Enable verbose debugging messages");