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);
55 static const struct usb_device_id id_table[] = {
56 { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */
57 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
58 { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
59 { USB_DEVICE(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
60 { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
61 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
62 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
63 { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
64 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
65 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
66 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
67 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
68 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
69 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
70 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
71 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
72 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
73 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
74 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
75 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
76 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */
77 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
78 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
79 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
80 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
81 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
82 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
83 { USB_DEVICE(0x10C4, 0x80C4) }, /* Cygnal Integrated Products, Inc., Optris infrared thermometer */
84 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
85 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
86 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
87 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
88 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
89 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
90 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
91 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
92 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
93 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
94 { USB_DEVICE(0x10C4, 0x815F) }, /* Timewave HamLinkUSB */
95 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
96 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
97 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
98 { USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */
99 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
100 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
101 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
102 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
103 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
104 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
105 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
106 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
107 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
108 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */
109 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */
110 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
111 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
112 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
113 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
114 { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
115 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
116 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
117 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
118 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
119 { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */
120 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
121 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
122 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
123 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
124 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
125 { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */
126 { USB_DEVICE(0x10C4, 0xEA80) }, /* Silicon Labs factory default */
127 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
128 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
129 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
130 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
131 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
132 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
133 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
134 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
135 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
136 { USB_DEVICE(0x166A, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */
137 { USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */
138 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
139 { USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */
140 { USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */
141 { USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */
142 { USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */
143 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
144 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
145 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
146 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
147 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
148 { USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */
149 { USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */
150 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
151 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
152 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
153 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
154 { USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */
155 { USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */
156 { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */
157 { USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */
158 { USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */
159 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
160 { } /* Terminating Entry */
163 MODULE_DEVICE_TABLE(usb, id_table);
165 struct cp210x_port_private {
166 __u8 bInterfaceNumber;
169 static struct usb_serial_driver cp210x_device = {
171 .owner = THIS_MODULE,
174 .id_table = id_table,
177 .bulk_out_size = 256,
179 .close = cp210x_close,
180 .break_ctl = cp210x_break_ctl,
181 .set_termios = cp210x_set_termios,
182 .tiocmget = cp210x_tiocmget,
183 .tiocmset = cp210x_tiocmset,
184 .attach = cp210x_startup,
185 .release = cp210x_release,
186 .dtr_rts = cp210x_dtr_rts
189 static struct usb_serial_driver * const serial_drivers[] = {
193 /* Config request types */
194 #define REQTYPE_HOST_TO_INTERFACE 0x41
195 #define REQTYPE_INTERFACE_TO_HOST 0xc1
196 #define REQTYPE_HOST_TO_DEVICE 0x40
197 #define REQTYPE_DEVICE_TO_HOST 0xc0
199 /* Config request codes */
200 #define CP210X_IFC_ENABLE 0x00
201 #define CP210X_SET_BAUDDIV 0x01
202 #define CP210X_GET_BAUDDIV 0x02
203 #define CP210X_SET_LINE_CTL 0x03
204 #define CP210X_GET_LINE_CTL 0x04
205 #define CP210X_SET_BREAK 0x05
206 #define CP210X_IMM_CHAR 0x06
207 #define CP210X_SET_MHS 0x07
208 #define CP210X_GET_MDMSTS 0x08
209 #define CP210X_SET_XON 0x09
210 #define CP210X_SET_XOFF 0x0A
211 #define CP210X_SET_EVENTMASK 0x0B
212 #define CP210X_GET_EVENTMASK 0x0C
213 #define CP210X_SET_CHAR 0x0D
214 #define CP210X_GET_CHARS 0x0E
215 #define CP210X_GET_PROPS 0x0F
216 #define CP210X_GET_COMM_STATUS 0x10
217 #define CP210X_RESET 0x11
218 #define CP210X_PURGE 0x12
219 #define CP210X_SET_FLOW 0x13
220 #define CP210X_GET_FLOW 0x14
221 #define CP210X_EMBED_EVENTS 0x15
222 #define CP210X_GET_EVENTSTATE 0x16
223 #define CP210X_SET_CHARS 0x19
224 #define CP210X_GET_BAUDRATE 0x1D
225 #define CP210X_SET_BAUDRATE 0x1E
227 /* CP210X_IFC_ENABLE */
228 #define UART_ENABLE 0x0001
229 #define UART_DISABLE 0x0000
231 /* CP210X_(SET|GET)_BAUDDIV */
232 #define BAUD_RATE_GEN_FREQ 0x384000
234 /* CP210X_(SET|GET)_LINE_CTL */
235 #define BITS_DATA_MASK 0X0f00
236 #define BITS_DATA_5 0X0500
237 #define BITS_DATA_6 0X0600
238 #define BITS_DATA_7 0X0700
239 #define BITS_DATA_8 0X0800
240 #define BITS_DATA_9 0X0900
242 #define BITS_PARITY_MASK 0x00f0
243 #define BITS_PARITY_NONE 0x0000
244 #define BITS_PARITY_ODD 0x0010
245 #define BITS_PARITY_EVEN 0x0020
246 #define BITS_PARITY_MARK 0x0030
247 #define BITS_PARITY_SPACE 0x0040
249 #define BITS_STOP_MASK 0x000f
250 #define BITS_STOP_1 0x0000
251 #define BITS_STOP_1_5 0x0001
252 #define BITS_STOP_2 0x0002
254 /* CP210X_SET_BREAK */
255 #define BREAK_ON 0x0001
256 #define BREAK_OFF 0x0000
258 /* CP210X_(SET_MHS|GET_MDMSTS) */
259 #define CONTROL_DTR 0x0001
260 #define CONTROL_RTS 0x0002
261 #define CONTROL_CTS 0x0010
262 #define CONTROL_DSR 0x0020
263 #define CONTROL_RING 0x0040
264 #define CONTROL_DCD 0x0080
265 #define CONTROL_WRITE_DTR 0x0100
266 #define CONTROL_WRITE_RTS 0x0200
270 * Reads from the CP210x configuration registers
271 * 'size' is specified in bytes.
272 * 'data' is a pointer to a pre-allocated array of integers large
273 * enough to hold 'size' bytes (with 4 bytes to each integer)
275 static int cp210x_get_config(struct usb_serial_port *port, u8 request,
276 unsigned int *data, int size)
278 struct usb_serial *serial = port->serial;
279 struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
281 int result, i, length;
283 /* Number of integers required to contain the array */
284 length = (((size - 1) | 3) + 1)/4;
286 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
288 dev_err(&port->dev, "%s - out of memory.\n", __func__);
292 /* Issue the request, attempting to read 'size' bytes */
293 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
294 request, REQTYPE_INTERFACE_TO_HOST, 0x0000,
295 port_priv->bInterfaceNumber, buf, size,
296 USB_CTRL_GET_TIMEOUT);
298 /* Convert data into an array of integers */
299 for (i = 0; i < length; i++)
300 data[i] = le32_to_cpu(buf[i]);
304 if (result != size) {
305 dev_dbg(&port->dev, "%s - Unable to send config request, request=0x%x size=%d result=%d\n",
306 __func__, request, size, result);
318 * Writes to the CP210x configuration registers
319 * Values less than 16 bits wide are sent directly
320 * 'size' is specified in bytes.
322 static int cp210x_set_config(struct usb_serial_port *port, u8 request,
323 unsigned int *data, int size)
325 struct usb_serial *serial = port->serial;
326 struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
328 int result, i, length;
330 /* Number of integers required to contain the array */
331 length = (((size - 1) | 3) + 1)/4;
333 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
335 dev_err(&port->dev, "%s - out of memory.\n",
340 /* Array of integers into bytes */
341 for (i = 0; i < length; i++)
342 buf[i] = cpu_to_le32(data[i]);
345 result = usb_control_msg(serial->dev,
346 usb_sndctrlpipe(serial->dev, 0),
347 request, REQTYPE_HOST_TO_INTERFACE, 0x0000,
348 port_priv->bInterfaceNumber, buf, size,
349 USB_CTRL_SET_TIMEOUT);
351 result = usb_control_msg(serial->dev,
352 usb_sndctrlpipe(serial->dev, 0),
353 request, REQTYPE_HOST_TO_INTERFACE, data[0],
354 port_priv->bInterfaceNumber, NULL, 0,
355 USB_CTRL_SET_TIMEOUT);
360 if ((size > 2 && result != size) || result < 0) {
361 dev_dbg(&port->dev, "%s - Unable to send request, request=0x%x size=%d result=%d\n",
362 __func__, request, size, result);
373 * cp210x_set_config_single
374 * Convenience function for calling cp210x_set_config on single data values
375 * without requiring an integer pointer
377 static inline int cp210x_set_config_single(struct usb_serial_port *port,
378 u8 request, unsigned int data)
380 return cp210x_set_config(port, request, &data, 2);
384 * cp210x_quantise_baudrate
385 * Quantises the baud rate as per AN205 Table 1
387 static unsigned int cp210x_quantise_baudrate(unsigned int baud) {
390 else if (baud <= 600) baud = 600;
391 else if (baud <= 1200) baud = 1200;
392 else if (baud <= 1800) baud = 1800;
393 else if (baud <= 2400) baud = 2400;
394 else if (baud <= 4000) baud = 4000;
395 else if (baud <= 4803) baud = 4800;
396 else if (baud <= 7207) baud = 7200;
397 else if (baud <= 9612) baud = 9600;
398 else if (baud <= 14428) baud = 14400;
399 else if (baud <= 16062) baud = 16000;
400 else if (baud <= 19250) baud = 19200;
401 else if (baud <= 28912) baud = 28800;
402 else if (baud <= 38601) baud = 38400;
403 else if (baud <= 51558) baud = 51200;
404 else if (baud <= 56280) baud = 56000;
405 else if (baud <= 58053) baud = 57600;
406 else if (baud <= 64111) baud = 64000;
407 else if (baud <= 77608) baud = 76800;
408 else if (baud <= 117028) baud = 115200;
409 else if (baud <= 129347) baud = 128000;
410 else if (baud <= 156868) baud = 153600;
411 else if (baud <= 237832) baud = 230400;
412 else if (baud <= 254234) baud = 250000;
413 else if (baud <= 273066) baud = 256000;
414 else if (baud <= 491520) baud = 460800;
415 else if (baud <= 567138) baud = 500000;
416 else if (baud <= 670254) baud = 576000;
417 else if (baud < 1000000)
419 else if (baud > 2000000)
424 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
428 result = cp210x_set_config_single(port, CP210X_IFC_ENABLE,
431 dev_err(&port->dev, "%s - Unable to enable UART\n", __func__);
435 /* Configure the termios structure */
436 cp210x_get_termios(tty, port);
438 /* The baud rate must be initialised on cp2104 */
440 cp210x_change_speed(tty, port, NULL);
442 return usb_serial_generic_open(tty, port);
445 static void cp210x_close(struct usb_serial_port *port)
447 usb_serial_generic_close(port);
449 mutex_lock(&port->serial->disc_mutex);
450 if (!port->serial->disconnected)
451 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
452 mutex_unlock(&port->serial->disc_mutex);
457 * Reads the baud rate, data bits, parity, stop bits and flow control mode
458 * from the device, corrects any unsupported values, and configures the
459 * termios structure to reflect the state of the device
461 static void cp210x_get_termios(struct tty_struct *tty,
462 struct usb_serial_port *port)
467 cp210x_get_termios_port(tty->driver_data,
468 &tty->termios.c_cflag, &baud);
469 tty_encode_baud_rate(tty, baud, baud);
475 cp210x_get_termios_port(port, &cflag, &baud);
480 * cp210x_get_termios_port
481 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
483 static void cp210x_get_termios_port(struct usb_serial_port *port,
484 unsigned int *cflagp, unsigned int *baudp)
486 struct device *dev = &port->dev;
487 unsigned int cflag, modem_ctl[4];
491 cp210x_get_config(port, CP210X_GET_BAUDRATE, &baud, 4);
493 dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
498 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
500 switch (bits & BITS_DATA_MASK) {
502 dev_dbg(dev, "%s - data bits = 5\n", __func__);
506 dev_dbg(dev, "%s - data bits = 6\n", __func__);
510 dev_dbg(dev, "%s - data bits = 7\n", __func__);
514 dev_dbg(dev, "%s - data bits = 8\n", __func__);
518 dev_dbg(dev, "%s - data bits = 9 (not supported, using 8 data bits)\n", __func__);
520 bits &= ~BITS_DATA_MASK;
522 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
525 dev_dbg(dev, "%s - Unknown number of data bits, using 8\n", __func__);
527 bits &= ~BITS_DATA_MASK;
529 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
533 switch (bits & BITS_PARITY_MASK) {
534 case BITS_PARITY_NONE:
535 dev_dbg(dev, "%s - parity = NONE\n", __func__);
538 case BITS_PARITY_ODD:
539 dev_dbg(dev, "%s - parity = ODD\n", __func__);
540 cflag |= (PARENB|PARODD);
542 case BITS_PARITY_EVEN:
543 dev_dbg(dev, "%s - parity = EVEN\n", __func__);
547 case BITS_PARITY_MARK:
548 dev_dbg(dev, "%s - parity = MARK\n", __func__);
549 cflag |= (PARENB|PARODD|CMSPAR);
551 case BITS_PARITY_SPACE:
552 dev_dbg(dev, "%s - parity = SPACE\n", __func__);
554 cflag |= (PARENB|CMSPAR);
557 dev_dbg(dev, "%s - Unknown parity mode, disabling parity\n", __func__);
559 bits &= ~BITS_PARITY_MASK;
560 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
565 switch (bits & BITS_STOP_MASK) {
567 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
570 dev_dbg(dev, "%s - stop bits = 1.5 (not supported, using 1 stop bit)\n", __func__);
571 bits &= ~BITS_STOP_MASK;
572 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
575 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
579 dev_dbg(dev, "%s - Unknown number of stop bits, using 1 stop bit\n", __func__);
580 bits &= ~BITS_STOP_MASK;
581 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
585 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
586 if (modem_ctl[0] & 0x0008) {
587 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__);
590 dev_dbg(dev, "%s - flow control = NONE\n", __func__);
598 * CP2101 supports the following baud rates:
600 * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800,
601 * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600
603 * CP2102 and CP2103 support the following additional rates:
605 * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000,
608 * The device will map a requested rate to a supported one, but the result
609 * of requests for rates greater than 1053257 is undefined (see AN205).
611 * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud,
612 * respectively, with an error less than 1%. The actual rates are determined
615 * div = round(freq / (2 x prescale x request))
616 * actual = freq / (2 x prescale x div)
618 * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps
620 * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1
623 static void cp210x_change_speed(struct tty_struct *tty,
624 struct usb_serial_port *port, struct ktermios *old_termios)
628 baud = tty->termios.c_ospeed;
630 /* This maps the requested rate to a rate valid on cp2102 or cp2103,
631 * or to an arbitrary rate in [1M,2M].
633 * NOTE: B0 is not implemented.
635 baud = cp210x_quantise_baudrate(baud);
637 dev_dbg(&port->dev, "%s - setting baud rate to %u\n", __func__, baud);
638 if (cp210x_set_config(port, CP210X_SET_BAUDRATE, &baud,
640 dev_warn(&port->dev, "failed to set baud rate to %u\n", baud);
642 baud = old_termios->c_ospeed;
647 tty_encode_baud_rate(tty, baud, baud);
650 static void cp210x_set_termios(struct tty_struct *tty,
651 struct usb_serial_port *port, struct ktermios *old_termios)
653 struct device *dev = &port->dev;
654 unsigned int cflag, old_cflag;
656 unsigned int modem_ctl[4];
658 dev_dbg(dev, "%s - port %d\n", __func__, port->number);
663 cflag = tty->termios.c_cflag;
664 old_cflag = old_termios->c_cflag;
666 if (tty->termios.c_ospeed != old_termios->c_ospeed)
667 cp210x_change_speed(tty, port, old_termios);
669 /* If the number of data bits is to be updated */
670 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
671 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
672 bits &= ~BITS_DATA_MASK;
673 switch (cflag & CSIZE) {
676 dev_dbg(dev, "%s - data bits = 5\n", __func__);
680 dev_dbg(dev, "%s - data bits = 6\n", __func__);
684 dev_dbg(dev, "%s - data bits = 7\n", __func__);
688 dev_dbg(dev, "%s - data bits = 8\n", __func__);
692 dev_dbg(dev, "%s - data bits = 9\n", __func__);
695 dev_dbg(dev, "cp210x driver does not support the number of bits requested, using 8 bit mode\n");
699 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
700 dev_dbg(dev, "Number of data bits requested not supported by device\n");
703 if ((cflag & (PARENB|PARODD|CMSPAR)) !=
704 (old_cflag & (PARENB|PARODD|CMSPAR))) {
705 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
706 bits &= ~BITS_PARITY_MASK;
707 if (cflag & PARENB) {
708 if (cflag & CMSPAR) {
709 if (cflag & PARODD) {
710 bits |= BITS_PARITY_MARK;
711 dev_dbg(dev, "%s - parity = MARK\n", __func__);
713 bits |= BITS_PARITY_SPACE;
714 dev_dbg(dev, "%s - parity = SPACE\n", __func__);
717 if (cflag & PARODD) {
718 bits |= BITS_PARITY_ODD;
719 dev_dbg(dev, "%s - parity = ODD\n", __func__);
721 bits |= BITS_PARITY_EVEN;
722 dev_dbg(dev, "%s - parity = EVEN\n", __func__);
726 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
727 dev_dbg(dev, "Parity mode not supported by device\n");
730 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
731 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
732 bits &= ~BITS_STOP_MASK;
733 if (cflag & CSTOPB) {
735 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
738 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
740 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
741 dev_dbg(dev, "Number of stop bits requested not supported by device\n");
744 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
745 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
746 dev_dbg(dev, "%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n",
747 __func__, modem_ctl[0], modem_ctl[1],
748 modem_ctl[2], modem_ctl[3]);
750 if (cflag & CRTSCTS) {
751 modem_ctl[0] &= ~0x7B;
752 modem_ctl[0] |= 0x09;
754 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__);
756 modem_ctl[0] &= ~0x7B;
757 modem_ctl[0] |= 0x01;
758 modem_ctl[1] |= 0x40;
759 dev_dbg(dev, "%s - flow control = NONE\n", __func__);
762 dev_dbg(dev, "%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n",
763 __func__, modem_ctl[0], modem_ctl[1],
764 modem_ctl[2], modem_ctl[3]);
765 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
770 static int cp210x_tiocmset (struct tty_struct *tty,
771 unsigned int set, unsigned int clear)
773 struct usb_serial_port *port = tty->driver_data;
774 return cp210x_tiocmset_port(port, set, clear);
777 static int cp210x_tiocmset_port(struct usb_serial_port *port,
778 unsigned int set, unsigned int clear)
780 unsigned int control = 0;
782 if (set & TIOCM_RTS) {
783 control |= CONTROL_RTS;
784 control |= CONTROL_WRITE_RTS;
786 if (set & TIOCM_DTR) {
787 control |= CONTROL_DTR;
788 control |= CONTROL_WRITE_DTR;
790 if (clear & TIOCM_RTS) {
791 control &= ~CONTROL_RTS;
792 control |= CONTROL_WRITE_RTS;
794 if (clear & TIOCM_DTR) {
795 control &= ~CONTROL_DTR;
796 control |= CONTROL_WRITE_DTR;
799 dev_dbg(&port->dev, "%s - control = 0x%.4x\n", __func__, control);
801 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
804 static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
807 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0);
809 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS);
812 static int cp210x_tiocmget (struct tty_struct *tty)
814 struct usb_serial_port *port = tty->driver_data;
815 unsigned int control;
818 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
820 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
821 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
822 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
823 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
824 |((control & CONTROL_RING)? TIOCM_RI : 0)
825 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
827 dev_dbg(&port->dev, "%s - control = 0x%.2x\n", __func__, control);
832 static void cp210x_break_ctl (struct tty_struct *tty, int break_state)
834 struct usb_serial_port *port = tty->driver_data;
837 if (break_state == 0)
841 dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
842 state == BREAK_OFF ? "off" : "on");
843 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
846 static int cp210x_startup(struct usb_serial *serial)
848 struct cp210x_port_private *port_priv;
851 /* cp210x buffers behave strangely unless device is reset */
852 usb_reset_device(serial->dev);
854 for (i = 0; i < serial->num_ports; i++) {
855 port_priv = kzalloc(sizeof(*port_priv), GFP_KERNEL);
859 port_priv->bInterfaceNumber =
860 serial->interface->cur_altsetting->desc.bInterfaceNumber;
862 usb_set_serial_port_data(serial->port[i], port_priv);
868 static void cp210x_release(struct usb_serial *serial)
870 struct cp210x_port_private *port_priv;
873 for (i = 0; i < serial->num_ports; i++) {
874 port_priv = usb_get_serial_port_data(serial->port[i]);
876 usb_set_serial_port_data(serial->port[i], NULL);
880 module_usb_serial_driver(serial_drivers, id_table);
882 MODULE_DESCRIPTION(DRIVER_DESC);
883 MODULE_VERSION(DRIVER_VERSION);
884 MODULE_LICENSE("GPL");