2 * Silicon Laboratories CP210x USB to RS232 serial adaptor driver
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
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>
27 #define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver"
32 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *);
33 static void cp210x_close(struct usb_serial_port *);
34 static void cp210x_get_termios(struct tty_struct *, struct usb_serial_port *);
35 static void cp210x_get_termios_port(struct usb_serial_port *port,
36 unsigned int *cflagp, unsigned int *baudp);
37 static void cp210x_change_speed(struct tty_struct *, struct usb_serial_port *,
39 static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *,
41 static int cp210x_tiocmget(struct tty_struct *);
42 static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int);
43 static int cp210x_tiocmset_port(struct usb_serial_port *port,
44 unsigned int, unsigned int);
45 static void cp210x_break_ctl(struct tty_struct *, int);
46 static int cp210x_startup(struct usb_serial *);
47 static void cp210x_release(struct usb_serial *);
48 static void cp210x_dtr_rts(struct usb_serial_port *p, int on);
50 static const struct usb_device_id id_table[] = {
51 { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */
52 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
53 { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
54 { USB_DEVICE(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
55 { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
56 { USB_DEVICE(0x0846, 0x1100) }, /* NetGear Managed Switch M4100 series, M5300 series, M7100 series */
57 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
58 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
59 { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
60 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
61 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
62 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
63 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
64 { USB_DEVICE(0x0FDE, 0xCA05) }, /* OWL Wireless Electricity Monitor CM-160 */
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, 0x0F91) }, /* Vstabi */
69 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
70 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
71 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
72 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
73 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */
74 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
75 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
76 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
77 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
78 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
79 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
80 { USB_DEVICE(0x10C4, 0x80C4) }, /* Cygnal Integrated Products, Inc., Optris infrared thermometer */
81 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
82 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
83 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
84 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
85 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
86 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
87 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
88 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
89 { USB_DEVICE(0x2405, 0x0003) }, /* West Mountain Radio RIGblaster Advantage */
90 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
91 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
92 { USB_DEVICE(0x10C4, 0x815F) }, /* Timewave HamLinkUSB */
93 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
94 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
95 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
96 { USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */
97 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
98 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
99 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
100 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
101 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
102 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
103 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
104 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
105 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
106 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */
107 { USB_DEVICE(0x10C4, 0x8281) }, /* Nanotec Plug & Drive */
108 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */
109 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
110 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
111 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
112 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
113 { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
114 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
115 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
116 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
117 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
118 { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */
119 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
120 { USB_DEVICE(0x10C4, 0x85F8) }, /* Virtenio Preon32 */
121 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
122 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
123 { USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */
124 { USB_DEVICE(0x10C4, 0x88A5) }, /* Planet Innovation Ingeni ZigBee USB Device */
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(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */
156 { USB_DEVICE(0x1B1C, 0x1C00) }, /* Corsair USB Dongle */
157 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
158 { USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */
159 { USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */
160 { USB_DEVICE(0x1FB9, 0x0100) }, /* Lake Shore Model 121 Current Source */
161 { USB_DEVICE(0x1FB9, 0x0200) }, /* Lake Shore Model 218A Temperature Monitor */
162 { USB_DEVICE(0x1FB9, 0x0201) }, /* Lake Shore Model 219 Temperature Monitor */
163 { USB_DEVICE(0x1FB9, 0x0202) }, /* Lake Shore Model 233 Temperature Transmitter */
164 { USB_DEVICE(0x1FB9, 0x0203) }, /* Lake Shore Model 235 Temperature Transmitter */
165 { USB_DEVICE(0x1FB9, 0x0300) }, /* Lake Shore Model 335 Temperature Controller */
166 { USB_DEVICE(0x1FB9, 0x0301) }, /* Lake Shore Model 336 Temperature Controller */
167 { USB_DEVICE(0x1FB9, 0x0302) }, /* Lake Shore Model 350 Temperature Controller */
168 { USB_DEVICE(0x1FB9, 0x0303) }, /* Lake Shore Model 371 AC Bridge */
169 { USB_DEVICE(0x1FB9, 0x0400) }, /* Lake Shore Model 411 Handheld Gaussmeter */
170 { USB_DEVICE(0x1FB9, 0x0401) }, /* Lake Shore Model 425 Gaussmeter */
171 { USB_DEVICE(0x1FB9, 0x0402) }, /* Lake Shore Model 455A Gaussmeter */
172 { USB_DEVICE(0x1FB9, 0x0403) }, /* Lake Shore Model 475A Gaussmeter */
173 { USB_DEVICE(0x1FB9, 0x0404) }, /* Lake Shore Model 465 Three Axis Gaussmeter */
174 { USB_DEVICE(0x1FB9, 0x0600) }, /* Lake Shore Model 625A Superconducting MPS */
175 { USB_DEVICE(0x1FB9, 0x0601) }, /* Lake Shore Model 642A Magnet Power Supply */
176 { USB_DEVICE(0x1FB9, 0x0602) }, /* Lake Shore Model 648 Magnet Power Supply */
177 { USB_DEVICE(0x1FB9, 0x0700) }, /* Lake Shore Model 737 VSM Controller */
178 { USB_DEVICE(0x1FB9, 0x0701) }, /* Lake Shore Model 776 Hall Matrix */
179 { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */
180 { USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */
181 { USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */
182 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
183 { } /* Terminating Entry */
186 MODULE_DEVICE_TABLE(usb, id_table);
188 struct cp210x_serial_private {
189 __u8 bInterfaceNumber;
192 static struct usb_serial_driver cp210x_device = {
194 .owner = THIS_MODULE,
197 .id_table = id_table,
200 .bulk_out_size = 256,
202 .close = cp210x_close,
203 .break_ctl = cp210x_break_ctl,
204 .set_termios = cp210x_set_termios,
205 .tiocmget = cp210x_tiocmget,
206 .tiocmset = cp210x_tiocmset,
207 .attach = cp210x_startup,
208 .release = cp210x_release,
209 .dtr_rts = cp210x_dtr_rts
212 static struct usb_serial_driver * const serial_drivers[] = {
216 /* Config request types */
217 #define REQTYPE_HOST_TO_INTERFACE 0x41
218 #define REQTYPE_INTERFACE_TO_HOST 0xc1
219 #define REQTYPE_HOST_TO_DEVICE 0x40
220 #define REQTYPE_DEVICE_TO_HOST 0xc0
222 /* Config request codes */
223 #define CP210X_IFC_ENABLE 0x00
224 #define CP210X_SET_BAUDDIV 0x01
225 #define CP210X_GET_BAUDDIV 0x02
226 #define CP210X_SET_LINE_CTL 0x03
227 #define CP210X_GET_LINE_CTL 0x04
228 #define CP210X_SET_BREAK 0x05
229 #define CP210X_IMM_CHAR 0x06
230 #define CP210X_SET_MHS 0x07
231 #define CP210X_GET_MDMSTS 0x08
232 #define CP210X_SET_XON 0x09
233 #define CP210X_SET_XOFF 0x0A
234 #define CP210X_SET_EVENTMASK 0x0B
235 #define CP210X_GET_EVENTMASK 0x0C
236 #define CP210X_SET_CHAR 0x0D
237 #define CP210X_GET_CHARS 0x0E
238 #define CP210X_GET_PROPS 0x0F
239 #define CP210X_GET_COMM_STATUS 0x10
240 #define CP210X_RESET 0x11
241 #define CP210X_PURGE 0x12
242 #define CP210X_SET_FLOW 0x13
243 #define CP210X_GET_FLOW 0x14
244 #define CP210X_EMBED_EVENTS 0x15
245 #define CP210X_GET_EVENTSTATE 0x16
246 #define CP210X_SET_CHARS 0x19
247 #define CP210X_GET_BAUDRATE 0x1D
248 #define CP210X_SET_BAUDRATE 0x1E
250 /* CP210X_IFC_ENABLE */
251 #define UART_ENABLE 0x0001
252 #define UART_DISABLE 0x0000
254 /* CP210X_(SET|GET)_BAUDDIV */
255 #define BAUD_RATE_GEN_FREQ 0x384000
257 /* CP210X_(SET|GET)_LINE_CTL */
258 #define BITS_DATA_MASK 0X0f00
259 #define BITS_DATA_5 0X0500
260 #define BITS_DATA_6 0X0600
261 #define BITS_DATA_7 0X0700
262 #define BITS_DATA_8 0X0800
263 #define BITS_DATA_9 0X0900
265 #define BITS_PARITY_MASK 0x00f0
266 #define BITS_PARITY_NONE 0x0000
267 #define BITS_PARITY_ODD 0x0010
268 #define BITS_PARITY_EVEN 0x0020
269 #define BITS_PARITY_MARK 0x0030
270 #define BITS_PARITY_SPACE 0x0040
272 #define BITS_STOP_MASK 0x000f
273 #define BITS_STOP_1 0x0000
274 #define BITS_STOP_1_5 0x0001
275 #define BITS_STOP_2 0x0002
277 /* CP210X_SET_BREAK */
278 #define BREAK_ON 0x0001
279 #define BREAK_OFF 0x0000
281 /* CP210X_(SET_MHS|GET_MDMSTS) */
282 #define CONTROL_DTR 0x0001
283 #define CONTROL_RTS 0x0002
284 #define CONTROL_CTS 0x0010
285 #define CONTROL_DSR 0x0020
286 #define CONTROL_RING 0x0040
287 #define CONTROL_DCD 0x0080
288 #define CONTROL_WRITE_DTR 0x0100
289 #define CONTROL_WRITE_RTS 0x0200
293 * Reads from the CP210x configuration registers
294 * 'size' is specified in bytes.
295 * 'data' is a pointer to a pre-allocated array of integers large
296 * enough to hold 'size' bytes (with 4 bytes to each integer)
298 static int cp210x_get_config(struct usb_serial_port *port, u8 request,
299 unsigned int *data, int size)
301 struct usb_serial *serial = port->serial;
302 struct cp210x_serial_private *spriv = usb_get_serial_data(serial);
304 int result, i, length;
306 /* Number of integers required to contain the array */
307 length = (((size - 1) | 3) + 1) / 4;
309 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
313 /* Issue the request, attempting to read 'size' bytes */
314 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
315 request, REQTYPE_INTERFACE_TO_HOST, 0x0000,
316 spriv->bInterfaceNumber, buf, size,
317 USB_CTRL_GET_TIMEOUT);
319 /* Convert data into an array of integers */
320 for (i = 0; i < length; i++)
321 data[i] = le32_to_cpu(buf[i]);
325 if (result != size) {
326 dev_dbg(&port->dev, "%s - Unable to send config request, request=0x%x size=%d result=%d\n",
327 __func__, request, size, result);
339 * Writes to the CP210x configuration registers
340 * Values less than 16 bits wide are sent directly
341 * 'size' is specified in bytes.
343 static int cp210x_set_config(struct usb_serial_port *port, u8 request,
344 unsigned int *data, int size)
346 struct usb_serial *serial = port->serial;
347 struct cp210x_serial_private *spriv = usb_get_serial_data(serial);
349 int result, i, length;
351 /* Number of integers required to contain the array */
352 length = (((size - 1) | 3) + 1) / 4;
354 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
358 /* Array of integers into bytes */
359 for (i = 0; i < length; i++)
360 buf[i] = cpu_to_le32(data[i]);
363 result = usb_control_msg(serial->dev,
364 usb_sndctrlpipe(serial->dev, 0),
365 request, REQTYPE_HOST_TO_INTERFACE, 0x0000,
366 spriv->bInterfaceNumber, buf, size,
367 USB_CTRL_SET_TIMEOUT);
369 result = usb_control_msg(serial->dev,
370 usb_sndctrlpipe(serial->dev, 0),
371 request, REQTYPE_HOST_TO_INTERFACE, data[0],
372 spriv->bInterfaceNumber, NULL, 0,
373 USB_CTRL_SET_TIMEOUT);
378 if ((size > 2 && result != size) || result < 0) {
379 dev_dbg(&port->dev, "%s - Unable to send request, request=0x%x size=%d result=%d\n",
380 __func__, request, size, result);
391 * cp210x_set_config_single
392 * Convenience function for calling cp210x_set_config on single data values
393 * without requiring an integer pointer
395 static inline int cp210x_set_config_single(struct usb_serial_port *port,
396 u8 request, unsigned int data)
398 return cp210x_set_config(port, request, &data, 2);
402 * cp210x_quantise_baudrate
403 * Quantises the baud rate as per AN205 Table 1
405 static unsigned int cp210x_quantise_baudrate(unsigned int baud)
409 else if (baud <= 600) baud = 600;
410 else if (baud <= 1200) baud = 1200;
411 else if (baud <= 1800) baud = 1800;
412 else if (baud <= 2400) baud = 2400;
413 else if (baud <= 4000) baud = 4000;
414 else if (baud <= 4803) baud = 4800;
415 else if (baud <= 7207) baud = 7200;
416 else if (baud <= 9612) baud = 9600;
417 else if (baud <= 14428) baud = 14400;
418 else if (baud <= 16062) baud = 16000;
419 else if (baud <= 19250) baud = 19200;
420 else if (baud <= 28912) baud = 28800;
421 else if (baud <= 38601) baud = 38400;
422 else if (baud <= 51558) baud = 51200;
423 else if (baud <= 56280) baud = 56000;
424 else if (baud <= 58053) baud = 57600;
425 else if (baud <= 64111) baud = 64000;
426 else if (baud <= 77608) baud = 76800;
427 else if (baud <= 117028) baud = 115200;
428 else if (baud <= 129347) baud = 128000;
429 else if (baud <= 156868) baud = 153600;
430 else if (baud <= 237832) baud = 230400;
431 else if (baud <= 254234) baud = 250000;
432 else if (baud <= 273066) baud = 256000;
433 else if (baud <= 491520) baud = 460800;
434 else if (baud <= 567138) baud = 500000;
435 else if (baud <= 670254) baud = 576000;
436 else if (baud < 1000000)
438 else if (baud > 2000000)
443 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
447 result = cp210x_set_config_single(port, CP210X_IFC_ENABLE,
450 dev_err(&port->dev, "%s - Unable to enable UART\n", __func__);
454 /* Configure the termios structure */
455 cp210x_get_termios(tty, port);
457 /* The baud rate must be initialised on cp2104 */
459 cp210x_change_speed(tty, port, NULL);
461 return usb_serial_generic_open(tty, port);
464 static void cp210x_close(struct usb_serial_port *port)
466 usb_serial_generic_close(port);
467 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
472 * Reads the baud rate, data bits, parity, stop bits and flow control mode
473 * from the device, corrects any unsupported values, and configures the
474 * termios structure to reflect the state of the device
476 static void cp210x_get_termios(struct tty_struct *tty,
477 struct usb_serial_port *port)
482 cp210x_get_termios_port(tty->driver_data,
483 &tty->termios.c_cflag, &baud);
484 tty_encode_baud_rate(tty, baud, baud);
488 cp210x_get_termios_port(port, &cflag, &baud);
493 * cp210x_get_termios_port
494 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
496 static void cp210x_get_termios_port(struct usb_serial_port *port,
497 unsigned int *cflagp, unsigned int *baudp)
499 struct device *dev = &port->dev;
500 unsigned int cflag, modem_ctl[4];
504 cp210x_get_config(port, CP210X_GET_BAUDRATE, &baud, 4);
506 dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
511 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
513 switch (bits & BITS_DATA_MASK) {
515 dev_dbg(dev, "%s - data bits = 5\n", __func__);
519 dev_dbg(dev, "%s - data bits = 6\n", __func__);
523 dev_dbg(dev, "%s - data bits = 7\n", __func__);
527 dev_dbg(dev, "%s - data bits = 8\n", __func__);
531 dev_dbg(dev, "%s - data bits = 9 (not supported, using 8 data bits)\n", __func__);
533 bits &= ~BITS_DATA_MASK;
535 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
538 dev_dbg(dev, "%s - Unknown number of data bits, using 8\n", __func__);
540 bits &= ~BITS_DATA_MASK;
542 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
546 switch (bits & BITS_PARITY_MASK) {
547 case BITS_PARITY_NONE:
548 dev_dbg(dev, "%s - parity = NONE\n", __func__);
551 case BITS_PARITY_ODD:
552 dev_dbg(dev, "%s - parity = ODD\n", __func__);
553 cflag |= (PARENB|PARODD);
555 case BITS_PARITY_EVEN:
556 dev_dbg(dev, "%s - parity = EVEN\n", __func__);
560 case BITS_PARITY_MARK:
561 dev_dbg(dev, "%s - parity = MARK\n", __func__);
562 cflag |= (PARENB|PARODD|CMSPAR);
564 case BITS_PARITY_SPACE:
565 dev_dbg(dev, "%s - parity = SPACE\n", __func__);
567 cflag |= (PARENB|CMSPAR);
570 dev_dbg(dev, "%s - Unknown parity mode, disabling parity\n", __func__);
572 bits &= ~BITS_PARITY_MASK;
573 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
578 switch (bits & BITS_STOP_MASK) {
580 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
583 dev_dbg(dev, "%s - stop bits = 1.5 (not supported, using 1 stop bit)\n", __func__);
584 bits &= ~BITS_STOP_MASK;
585 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
588 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
592 dev_dbg(dev, "%s - Unknown number of stop bits, using 1 stop bit\n", __func__);
593 bits &= ~BITS_STOP_MASK;
594 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
598 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
599 if (modem_ctl[0] & 0x0008) {
600 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__);
603 dev_dbg(dev, "%s - flow control = NONE\n", __func__);
611 * CP2101 supports the following baud rates:
613 * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800,
614 * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600
616 * CP2102 and CP2103 support the following additional rates:
618 * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000,
621 * The device will map a requested rate to a supported one, but the result
622 * of requests for rates greater than 1053257 is undefined (see AN205).
624 * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud,
625 * respectively, with an error less than 1%. The actual rates are determined
628 * div = round(freq / (2 x prescale x request))
629 * actual = freq / (2 x prescale x div)
631 * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps
633 * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1
636 static void cp210x_change_speed(struct tty_struct *tty,
637 struct usb_serial_port *port, struct ktermios *old_termios)
641 baud = tty->termios.c_ospeed;
643 /* This maps the requested rate to a rate valid on cp2102 or cp2103,
644 * or to an arbitrary rate in [1M,2M].
646 * NOTE: B0 is not implemented.
648 baud = cp210x_quantise_baudrate(baud);
650 dev_dbg(&port->dev, "%s - setting baud rate to %u\n", __func__, baud);
651 if (cp210x_set_config(port, CP210X_SET_BAUDRATE, &baud,
653 dev_warn(&port->dev, "failed to set baud rate to %u\n", baud);
655 baud = old_termios->c_ospeed;
660 tty_encode_baud_rate(tty, baud, baud);
663 static void cp210x_set_termios(struct tty_struct *tty,
664 struct usb_serial_port *port, struct ktermios *old_termios)
666 struct device *dev = &port->dev;
667 unsigned int cflag, old_cflag;
669 unsigned int modem_ctl[4];
671 cflag = tty->termios.c_cflag;
672 old_cflag = old_termios->c_cflag;
674 if (tty->termios.c_ospeed != old_termios->c_ospeed)
675 cp210x_change_speed(tty, port, old_termios);
677 /* If the number of data bits is to be updated */
678 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
679 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
680 bits &= ~BITS_DATA_MASK;
681 switch (cflag & CSIZE) {
684 dev_dbg(dev, "%s - data bits = 5\n", __func__);
688 dev_dbg(dev, "%s - data bits = 6\n", __func__);
692 dev_dbg(dev, "%s - data bits = 7\n", __func__);
696 dev_dbg(dev, "%s - data bits = 8\n", __func__);
700 dev_dbg(dev, "%s - data bits = 9\n", __func__);
703 dev_dbg(dev, "cp210x driver does not support the number of bits requested, using 8 bit mode\n");
707 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
708 dev_dbg(dev, "Number of data bits requested not supported by device\n");
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 dev_dbg(dev, "%s - parity = MARK\n", __func__);
721 bits |= BITS_PARITY_SPACE;
722 dev_dbg(dev, "%s - parity = SPACE\n", __func__);
725 if (cflag & PARODD) {
726 bits |= BITS_PARITY_ODD;
727 dev_dbg(dev, "%s - parity = ODD\n", __func__);
729 bits |= BITS_PARITY_EVEN;
730 dev_dbg(dev, "%s - parity = EVEN\n", __func__);
734 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
735 dev_dbg(dev, "Parity mode not supported by device\n");
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 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
746 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
748 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
749 dev_dbg(dev, "Number of stop bits requested not supported by device\n");
752 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
753 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
754 dev_dbg(dev, "%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n",
755 __func__, modem_ctl[0], modem_ctl[1],
756 modem_ctl[2], modem_ctl[3]);
758 if (cflag & CRTSCTS) {
759 modem_ctl[0] &= ~0x7B;
760 modem_ctl[0] |= 0x09;
762 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__);
764 modem_ctl[0] &= ~0x7B;
765 modem_ctl[0] |= 0x01;
766 modem_ctl[1] |= 0x40;
767 dev_dbg(dev, "%s - flow control = NONE\n", __func__);
770 dev_dbg(dev, "%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n",
771 __func__, modem_ctl[0], modem_ctl[1],
772 modem_ctl[2], modem_ctl[3]);
773 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
778 static int cp210x_tiocmset(struct tty_struct *tty,
779 unsigned int set, unsigned int clear)
781 struct usb_serial_port *port = tty->driver_data;
782 return cp210x_tiocmset_port(port, set, clear);
785 static int cp210x_tiocmset_port(struct usb_serial_port *port,
786 unsigned int set, unsigned int clear)
788 unsigned int control = 0;
790 if (set & TIOCM_RTS) {
791 control |= CONTROL_RTS;
792 control |= CONTROL_WRITE_RTS;
794 if (set & TIOCM_DTR) {
795 control |= CONTROL_DTR;
796 control |= CONTROL_WRITE_DTR;
798 if (clear & TIOCM_RTS) {
799 control &= ~CONTROL_RTS;
800 control |= CONTROL_WRITE_RTS;
802 if (clear & TIOCM_DTR) {
803 control &= ~CONTROL_DTR;
804 control |= CONTROL_WRITE_DTR;
807 dev_dbg(&port->dev, "%s - control = 0x%.4x\n", __func__, control);
809 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
812 static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
815 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0);
817 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS);
820 static int cp210x_tiocmget(struct tty_struct *tty)
822 struct usb_serial_port *port = tty->driver_data;
823 unsigned int control;
826 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
828 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
829 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
830 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
831 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
832 |((control & CONTROL_RING)? TIOCM_RI : 0)
833 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
835 dev_dbg(&port->dev, "%s - control = 0x%.2x\n", __func__, control);
840 static void cp210x_break_ctl(struct tty_struct *tty, int break_state)
842 struct usb_serial_port *port = tty->driver_data;
845 if (break_state == 0)
849 dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
850 state == BREAK_OFF ? "off" : "on");
851 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
854 static int cp210x_startup(struct usb_serial *serial)
856 struct usb_host_interface *cur_altsetting;
857 struct cp210x_serial_private *spriv;
859 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL);
863 cur_altsetting = serial->interface->cur_altsetting;
864 spriv->bInterfaceNumber = cur_altsetting->desc.bInterfaceNumber;
866 usb_set_serial_data(serial, spriv);
871 static void cp210x_release(struct usb_serial *serial)
873 struct cp210x_serial_private *spriv;
875 spriv = usb_get_serial_data(serial);
879 module_usb_serial_driver(serial_drivers, id_table);
881 MODULE_DESCRIPTION(DRIVER_DESC);
882 MODULE_LICENSE("GPL");