1/* 2 * Silicon Laboratories CP210x USB to RS232 serial adaptor driver 3 * 4 * Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk) 5 * 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. 9 * 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 13 * 14 */ 15 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> 26 27/* 28 * Version Information 29 */ 30#define DRIVER_VERSION "v0.09" 31#define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver" 32 33/* 34 * Function Prototypes 35 */ 36static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *); 37static void cp210x_close(struct usb_serial_port *); 38static void cp210x_get_termios(struct tty_struct *, 39 struct usb_serial_port *port); 40static void cp210x_get_termios_port(struct usb_serial_port *port, 41 unsigned int *cflagp, unsigned int *baudp); 42static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *, 43 struct ktermios*); 44static int cp210x_tiocmget(struct tty_struct *, struct file *); 45static int cp210x_tiocmset(struct tty_struct *, struct file *, 46 unsigned int, unsigned int); 47static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *, 48 unsigned int, unsigned int); 49static void cp210x_break_ctl(struct tty_struct *, int); 50static int cp210x_startup(struct usb_serial *); 51static void cp210x_dtr_rts(struct usb_serial_port *p, int on); 52 53static int debug; 54 55static 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, 0x80CA) }, /* Degree Controls Inc */ 84 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */ 85 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */ 86 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */ 87 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */ 88 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */ 89 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */ 90 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */ 91 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */ 92 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */ 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, 0x81AC) }, /* MSD Dash Hawk */ 97 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */ 98 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */ 99 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */ 100 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */ 101 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */ 102 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */ 103 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */ 104 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */ 105 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */ 106 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesys ETRX2USB */ 107 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */ 108 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */ 109 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */ 110 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */ 111 { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */ 112 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */ 113 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */ 114 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */ 115 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */ 116 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ 117 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ 118 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */ 119 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */ 120 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */ 121 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */ 122 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */ 123 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ 124 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */ 125 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ 126 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */ 127 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ 128 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ 129 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */ 130 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */ 131 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */ 132 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */ 133 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */ 134 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */ 135 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */ 136 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */ 137 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */ 138 { } /* Terminating Entry */ 139}; 140 141MODULE_DEVICE_TABLE(usb, id_table); 142 143static struct usb_driver cp210x_driver = { 144 .name = "cp210x", 145 .probe = usb_serial_probe, 146 .disconnect = usb_serial_disconnect, 147 .id_table = id_table, 148 .no_dynamic_id = 1, 149}; 150 151static struct usb_serial_driver cp210x_device = { 152 .driver = { 153 .owner = THIS_MODULE, 154 .name = "cp210x", 155 }, 156 .usb_driver = &cp210x_driver, 157 .id_table = id_table, 158 .num_ports = 1, 159 .bulk_in_size = 256, 160 .bulk_out_size = 256, 161 .open = cp210x_open, 162 .close = cp210x_close, 163 .break_ctl = cp210x_break_ctl, 164 .set_termios = cp210x_set_termios, 165 .tiocmget = cp210x_tiocmget, 166 .tiocmset = cp210x_tiocmset, 167 .attach = cp210x_startup, 168 .dtr_rts = cp210x_dtr_rts 169}; 170 171/* Config request types */ 172#define REQTYPE_HOST_TO_DEVICE 0x41 173#define REQTYPE_DEVICE_TO_HOST 0xc1 174 175/* Config request codes */ 176#define CP210X_IFC_ENABLE 0x00 177#define CP210X_SET_BAUDDIV 0x01 178#define CP210X_GET_BAUDDIV 0x02 179#define CP210X_SET_LINE_CTL 0x03 180#define CP210X_GET_LINE_CTL 0x04 181#define CP210X_SET_BREAK 0x05 182#define CP210X_IMM_CHAR 0x06 183#define CP210X_SET_MHS 0x07 184#define CP210X_GET_MDMSTS 0x08 185#define CP210X_SET_XON 0x09 186#define CP210X_SET_XOFF 0x0A 187#define CP210X_SET_EVENTMASK 0x0B 188#define CP210X_GET_EVENTMASK 0x0C 189#define CP210X_SET_CHAR 0x0D 190#define CP210X_GET_CHARS 0x0E 191#define CP210X_GET_PROPS 0x0F 192#define CP210X_GET_COMM_STATUS 0x10 193#define CP210X_RESET 0x11 194#define CP210X_PURGE 0x12 195#define CP210X_SET_FLOW 0x13 196#define CP210X_GET_FLOW 0x14 197#define CP210X_EMBED_EVENTS 0x15 198#define CP210X_GET_EVENTSTATE 0x16 199#define CP210X_SET_CHARS 0x19 200 201/* CP210X_IFC_ENABLE */ 202#define UART_ENABLE 0x0001 203#define UART_DISABLE 0x0000 204 205/* CP210X_(SET|GET)_BAUDDIV */ 206#define BAUD_RATE_GEN_FREQ 0x384000 207 208/* CP210X_(SET|GET)_LINE_CTL */ 209#define BITS_DATA_MASK 0X0f00 210#define BITS_DATA_5 0X0500 211#define BITS_DATA_6 0X0600 212#define BITS_DATA_7 0X0700 213#define BITS_DATA_8 0X0800 214#define BITS_DATA_9 0X0900 215 216#define BITS_PARITY_MASK 0x00f0 217#define BITS_PARITY_NONE 0x0000 218#define BITS_PARITY_ODD 0x0010 219#define BITS_PARITY_EVEN 0x0020 220#define BITS_PARITY_MARK 0x0030 221#define BITS_PARITY_SPACE 0x0040 222 223#define BITS_STOP_MASK 0x000f 224#define BITS_STOP_1 0x0000 225#define BITS_STOP_1_5 0x0001 226#define BITS_STOP_2 0x0002 227 228/* CP210X_SET_BREAK */ 229#define BREAK_ON 0x0001 230#define BREAK_OFF 0x0000 231 232/* CP210X_(SET_MHS|GET_MDMSTS) */ 233#define CONTROL_DTR 0x0001 234#define CONTROL_RTS 0x0002 235#define CONTROL_CTS 0x0010 236#define CONTROL_DSR 0x0020 237#define CONTROL_RING 0x0040 238#define CONTROL_DCD 0x0080 239#define CONTROL_WRITE_DTR 0x0100 240#define CONTROL_WRITE_RTS 0x0200 241 242/* 243 * cp210x_get_config 244 * Reads from the CP210x configuration registers 245 * 'size' is specified in bytes. 246 * 'data' is a pointer to a pre-allocated array of integers large 247 * enough to hold 'size' bytes (with 4 bytes to each integer) 248 */ 249static int cp210x_get_config(struct usb_serial_port *port, u8 request, 250 unsigned int *data, int size) 251{ 252 struct usb_serial *serial = port->serial; 253 __le32 *buf; 254 int result, i, length; 255 256 /* Number of integers required to contain the array */ 257 length = (((size - 1) | 3) + 1)/4; 258 259 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL); 260 if (!buf) { 261 dev_err(&port->dev, "%s - out of memory.\n", __func__); 262 return -ENOMEM; 263 } 264 265 /* Issue the request, attempting to read 'size' bytes */ 266 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 267 request, REQTYPE_DEVICE_TO_HOST, 0x0000, 268 0, buf, size, 300); 269 270 /* Convert data into an array of integers */ 271 for (i = 0; i < length; i++) 272 data[i] = le32_to_cpu(buf[i]); 273 274 kfree(buf); 275 276 if (result != size) { 277 dbg("%s - Unable to send config request, " 278 "request=0x%x size=%d result=%d\n", 279 __func__, request, size, result); 280 return -EPROTO; 281 } 282 283 return 0; 284} 285 286/* 287 * cp210x_set_config 288 * Writes to the CP210x configuration registers 289 * Values less than 16 bits wide are sent directly 290 * 'size' is specified in bytes. 291 */ 292static int cp210x_set_config(struct usb_serial_port *port, u8 request, 293 unsigned int *data, int size) 294{ 295 struct usb_serial *serial = port->serial; 296 __le32 *buf; 297 int result, i, length; 298 299 /* Number of integers required to contain the array */ 300 length = (((size - 1) | 3) + 1)/4; 301 302 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL); 303 if (!buf) { 304 dev_err(&port->dev, "%s - out of memory.\n", 305 __func__); 306 return -ENOMEM; 307 } 308 309 /* Array of integers into bytes */ 310 for (i = 0; i < length; i++) 311 buf[i] = cpu_to_le32(data[i]); 312 313 if (size > 2) { 314 result = usb_control_msg(serial->dev, 315 usb_sndctrlpipe(serial->dev, 0), 316 request, REQTYPE_HOST_TO_DEVICE, 0x0000, 317 0, buf, size, 300); 318 } else { 319 result = usb_control_msg(serial->dev, 320 usb_sndctrlpipe(serial->dev, 0), 321 request, REQTYPE_HOST_TO_DEVICE, data[0], 322 0, NULL, 0, 300); 323 } 324 325 kfree(buf); 326 327 if ((size > 2 && result != size) || result < 0) { 328 dbg("%s - Unable to send request, " 329 "request=0x%x size=%d result=%d\n", 330 __func__, request, size, result); 331 return -EPROTO; 332 } 333 334 return 0; 335} 336 337/* 338 * cp210x_set_config_single 339 * Convenience function for calling cp210x_set_config on single data values 340 * without requiring an integer pointer 341 */ 342static inline int cp210x_set_config_single(struct usb_serial_port *port, 343 u8 request, unsigned int data) 344{ 345 return cp210x_set_config(port, request, &data, 2); 346} 347 348/* 349 * cp210x_quantise_baudrate 350 * Quantises the baud rate as per AN205 Table 1 351 */ 352static unsigned int cp210x_quantise_baudrate(unsigned int baud) { 353 if (baud <= 56) baud = 0; 354 else if (baud <= 300) baud = 300; 355 else if (baud <= 600) baud = 600; 356 else if (baud <= 1200) baud = 1200; 357 else if (baud <= 1800) baud = 1800; 358 else if (baud <= 2400) baud = 2400; 359 else if (baud <= 4000) baud = 4000; 360 else if (baud <= 4803) baud = 4800; 361 else if (baud <= 7207) baud = 7200; 362 else if (baud <= 9612) baud = 9600; 363 else if (baud <= 14428) baud = 14400; 364 else if (baud <= 16062) baud = 16000; 365 else if (baud <= 19250) baud = 19200; 366 else if (baud <= 28912) baud = 28800; 367 else if (baud <= 38601) baud = 38400; 368 else if (baud <= 51558) baud = 51200; 369 else if (baud <= 56280) baud = 56000; 370 else if (baud <= 58053) baud = 57600; 371 else if (baud <= 64111) baud = 64000; 372 else if (baud <= 77608) baud = 76800; 373 else if (baud <= 117028) baud = 115200; 374 else if (baud <= 129347) baud = 128000; 375 else if (baud <= 156868) baud = 153600; 376 else if (baud <= 237832) baud = 230400; 377 else if (baud <= 254234) baud = 250000; 378 else if (baud <= 273066) baud = 256000; 379 else if (baud <= 491520) baud = 460800; 380 else if (baud <= 567138) baud = 500000; 381 else if (baud <= 670254) baud = 576000; 382 else if (baud <= 1053257) baud = 921600; 383 else if (baud <= 1474560) baud = 1228800; 384 else if (baud <= 2457600) baud = 1843200; 385 else baud = 3686400; 386 return baud; 387} 388 389static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port) 390{ 391 int result; 392 393 dbg("%s - port %d", __func__, port->number); 394 395 if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) { 396 dev_err(&port->dev, "%s - Unable to enable UART\n", 397 __func__); 398 return -EPROTO; 399 } 400 401 result = usb_serial_generic_open(tty, port); 402 if (result) 403 return result; 404 405 /* Configure the termios structure */ 406 cp210x_get_termios(tty, port); 407 return 0; 408} 409 410static void cp210x_close(struct usb_serial_port *port) 411{ 412 dbg("%s - port %d", __func__, port->number); 413 414 usb_serial_generic_close(port); 415 416 mutex_lock(&port->serial->disc_mutex); 417 if (!port->serial->disconnected) 418 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE); 419 mutex_unlock(&port->serial->disc_mutex); 420} 421 422/* 423 * cp210x_get_termios 424 * Reads the baud rate, data bits, parity, stop bits and flow control mode 425 * from the device, corrects any unsupported values, and configures the 426 * termios structure to reflect the state of the device 427 */ 428static void cp210x_get_termios(struct tty_struct *tty, 429 struct usb_serial_port *port) 430{ 431 unsigned int baud; 432 433 if (tty) { 434 cp210x_get_termios_port(tty->driver_data, 435 &tty->termios->c_cflag, &baud); 436 tty_encode_baud_rate(tty, baud, baud); 437 } 438 439 else { 440 unsigned int cflag; 441 cflag = 0; 442 cp210x_get_termios_port(port, &cflag, &baud); 443 } 444} 445 446/* 447 * cp210x_get_termios_port 448 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port. 449 */ 450static void cp210x_get_termios_port(struct usb_serial_port *port, 451 unsigned int *cflagp, unsigned int *baudp) 452{ 453 unsigned int cflag, modem_ctl[4]; 454 unsigned int baud; 455 unsigned int bits; 456 457 dbg("%s - port %d", __func__, port->number); 458 459 cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2); 460 /* Convert to baudrate */ 461 if (baud) 462 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud); 463 464 dbg("%s - baud rate = %d", __func__, baud); 465 *baudp = baud; 466 467 cflag = *cflagp; 468 469 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 470 cflag &= ~CSIZE; 471 switch (bits & BITS_DATA_MASK) { 472 case BITS_DATA_5: 473 dbg("%s - data bits = 5", __func__); 474 cflag |= CS5; 475 break; 476 case BITS_DATA_6: 477 dbg("%s - data bits = 6", __func__); 478 cflag |= CS6; 479 break; 480 case BITS_DATA_7: 481 dbg("%s - data bits = 7", __func__); 482 cflag |= CS7; 483 break; 484 case BITS_DATA_8: 485 dbg("%s - data bits = 8", __func__); 486 cflag |= CS8; 487 break; 488 case BITS_DATA_9: 489 dbg("%s - data bits = 9 (not supported, using 8 data bits)", 490 __func__); 491 cflag |= CS8; 492 bits &= ~BITS_DATA_MASK; 493 bits |= BITS_DATA_8; 494 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 495 break; 496 default: 497 dbg("%s - Unknown number of data bits, using 8", __func__); 498 cflag |= CS8; 499 bits &= ~BITS_DATA_MASK; 500 bits |= BITS_DATA_8; 501 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 502 break; 503 } 504 505 switch (bits & BITS_PARITY_MASK) { 506 case BITS_PARITY_NONE: 507 dbg("%s - parity = NONE", __func__); 508 cflag &= ~PARENB; 509 break; 510 case BITS_PARITY_ODD: 511 dbg("%s - parity = ODD", __func__); 512 cflag |= (PARENB|PARODD); 513 break; 514 case BITS_PARITY_EVEN: 515 dbg("%s - parity = EVEN", __func__); 516 cflag &= ~PARODD; 517 cflag |= PARENB; 518 break; 519 case BITS_PARITY_MARK: 520 dbg("%s - parity = MARK (not supported, disabling parity)", 521 __func__); 522 cflag &= ~PARENB; 523 bits &= ~BITS_PARITY_MASK; 524 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 525 break; 526 case BITS_PARITY_SPACE: 527 dbg("%s - parity = SPACE (not supported, disabling parity)", 528 __func__); 529 cflag &= ~PARENB; 530 bits &= ~BITS_PARITY_MASK; 531 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 532 break; 533 default: 534 dbg("%s - Unknown parity mode, disabling parity", __func__); 535 cflag &= ~PARENB; 536 bits &= ~BITS_PARITY_MASK; 537 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 538 break; 539 } 540 541 cflag &= ~CSTOPB; 542 switch (bits & BITS_STOP_MASK) { 543 case BITS_STOP_1: 544 dbg("%s - stop bits = 1", __func__); 545 break; 546 case BITS_STOP_1_5: 547 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)", 548 __func__); 549 bits &= ~BITS_STOP_MASK; 550 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 551 break; 552 case BITS_STOP_2: 553 dbg("%s - stop bits = 2", __func__); 554 cflag |= CSTOPB; 555 break; 556 default: 557 dbg("%s - Unknown number of stop bits, using 1 stop bit", 558 __func__); 559 bits &= ~BITS_STOP_MASK; 560 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 561 break; 562 } 563 564 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 565 if (modem_ctl[0] & 0x0008) { 566 dbg("%s - flow control = CRTSCTS", __func__); 567 cflag |= CRTSCTS; 568 } else { 569 dbg("%s - flow control = NONE", __func__); 570 cflag &= ~CRTSCTS; 571 } 572 573 *cflagp = cflag; 574} 575 576static void cp210x_set_termios(struct tty_struct *tty, 577 struct usb_serial_port *port, struct ktermios *old_termios) 578{ 579 unsigned int cflag, old_cflag; 580 unsigned int baud = 0, bits; 581 unsigned int modem_ctl[4]; 582 583 dbg("%s - port %d", __func__, port->number); 584 585 if (!tty) 586 return; 587 588 tty->termios->c_cflag &= ~CMSPAR; 589 cflag = tty->termios->c_cflag; 590 old_cflag = old_termios->c_cflag; 591 baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty)); 592 593 /* If the baud rate is to be updated*/ 594 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) { 595 dbg("%s - Setting baud rate to %d baud", __func__, 596 baud); 597 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV, 598 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) { 599 dbg("Baud rate requested not supported by device"); 600 baud = tty_termios_baud_rate(old_termios); 601 } 602 } 603 /* Report back the resulting baud rate */ 604 tty_encode_baud_rate(tty, baud, baud); 605 606 /* If the number of data bits is to be updated */ 607 if ((cflag & CSIZE) != (old_cflag & CSIZE)) { 608 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 609 bits &= ~BITS_DATA_MASK; 610 switch (cflag & CSIZE) { 611 case CS5: 612 bits |= BITS_DATA_5; 613 dbg("%s - data bits = 5", __func__); 614 break; 615 case CS6: 616 bits |= BITS_DATA_6; 617 dbg("%s - data bits = 6", __func__); 618 break; 619 case CS7: 620 bits |= BITS_DATA_7; 621 dbg("%s - data bits = 7", __func__); 622 break; 623 case CS8: 624 bits |= BITS_DATA_8; 625 dbg("%s - data bits = 8", __func__); 626 break; 627 /*case CS9: 628 bits |= BITS_DATA_9; 629 dbg("%s - data bits = 9", __func__); 630 break;*/ 631 default: 632 dbg("cp210x driver does not " 633 "support the number of bits requested," 634 " using 8 bit mode\n"); 635 bits |= BITS_DATA_8; 636 break; 637 } 638 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 639 dbg("Number of data bits requested " 640 "not supported by device\n"); 641 } 642 643 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) { 644 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 645 bits &= ~BITS_PARITY_MASK; 646 if (cflag & PARENB) { 647 if (cflag & PARODD) { 648 bits |= BITS_PARITY_ODD; 649 dbg("%s - parity = ODD", __func__); 650 } else { 651 bits |= BITS_PARITY_EVEN; 652 dbg("%s - parity = EVEN", __func__); 653 } 654 } 655 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 656 dbg("Parity mode not supported " 657 "by device\n"); 658 } 659 660 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { 661 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 662 bits &= ~BITS_STOP_MASK; 663 if (cflag & CSTOPB) { 664 bits |= BITS_STOP_2; 665 dbg("%s - stop bits = 2", __func__); 666 } else { 667 bits |= BITS_STOP_1; 668 dbg("%s - stop bits = 1", __func__); 669 } 670 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 671 dbg("Number of stop bits requested " 672 "not supported by device\n"); 673 } 674 675 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { 676 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 677 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", 678 __func__, modem_ctl[0], modem_ctl[1], 679 modem_ctl[2], modem_ctl[3]); 680 681 if (cflag & CRTSCTS) { 682 modem_ctl[0] &= ~0x7B; 683 modem_ctl[0] |= 0x09; 684 modem_ctl[1] = 0x80; 685 dbg("%s - flow control = CRTSCTS", __func__); 686 } else { 687 modem_ctl[0] &= ~0x7B; 688 modem_ctl[0] |= 0x01; 689 modem_ctl[1] |= 0x40; 690 dbg("%s - flow control = NONE", __func__); 691 } 692 693 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", 694 __func__, modem_ctl[0], modem_ctl[1], 695 modem_ctl[2], modem_ctl[3]); 696 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16); 697 } 698 699} 700 701static int cp210x_tiocmset (struct tty_struct *tty, struct file *file, 702 unsigned int set, unsigned int clear) 703{ 704 struct usb_serial_port *port = tty->driver_data; 705 return cp210x_tiocmset_port(port, file, set, clear); 706} 707 708static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *file, 709 unsigned int set, unsigned int clear) 710{ 711 unsigned int control = 0; 712 713 dbg("%s - port %d", __func__, port->number); 714 715 if (set & TIOCM_RTS) { 716 control |= CONTROL_RTS; 717 control |= CONTROL_WRITE_RTS; 718 } 719 if (set & TIOCM_DTR) { 720 control |= CONTROL_DTR; 721 control |= CONTROL_WRITE_DTR; 722 } 723 if (clear & TIOCM_RTS) { 724 control &= ~CONTROL_RTS; 725 control |= CONTROL_WRITE_RTS; 726 } 727 if (clear & TIOCM_DTR) { 728 control &= ~CONTROL_DTR; 729 control |= CONTROL_WRITE_DTR; 730 } 731 732 dbg("%s - control = 0x%.4x", __func__, control); 733 734 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2); 735} 736 737static void cp210x_dtr_rts(struct usb_serial_port *p, int on) 738{ 739 if (on) 740 cp210x_tiocmset_port(p, NULL, TIOCM_DTR|TIOCM_RTS, 0); 741 else 742 cp210x_tiocmset_port(p, NULL, 0, TIOCM_DTR|TIOCM_RTS); 743} 744 745static int cp210x_tiocmget (struct tty_struct *tty, struct file *file) 746{ 747 struct usb_serial_port *port = tty->driver_data; 748 unsigned int control; 749 int result; 750 751 dbg("%s - port %d", __func__, port->number); 752 753 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1); 754 755 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) 756 |((control & CONTROL_RTS) ? TIOCM_RTS : 0) 757 |((control & CONTROL_CTS) ? TIOCM_CTS : 0) 758 |((control & CONTROL_DSR) ? TIOCM_DSR : 0) 759 |((control & CONTROL_RING)? TIOCM_RI : 0) 760 |((control & CONTROL_DCD) ? TIOCM_CD : 0); 761 762 dbg("%s - control = 0x%.2x", __func__, control); 763 764 return result; 765} 766 767static void cp210x_break_ctl (struct tty_struct *tty, int break_state) 768{ 769 struct usb_serial_port *port = tty->driver_data; 770 unsigned int state; 771 772 dbg("%s - port %d", __func__, port->number); 773 if (break_state == 0) 774 state = BREAK_OFF; 775 else 776 state = BREAK_ON; 777 dbg("%s - turning break %s", __func__, 778 state == BREAK_OFF ? "off" : "on"); 779 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2); 780} 781 782static int cp210x_startup(struct usb_serial *serial) 783{ 784 /* cp210x buffers behave strangely unless device is reset */ 785 usb_reset_device(serial->dev); 786 return 0; 787} 788 789static int __init cp210x_init(void) 790{ 791 int retval; 792 793 retval = usb_serial_register(&cp210x_device); 794 if (retval) 795 return retval; /* Failed to register */ 796 797 retval = usb_register(&cp210x_driver); 798 if (retval) { 799 /* Failed to register */ 800 usb_serial_deregister(&cp210x_device); 801 return retval; 802 } 803 804 /* Success */ 805 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 806 DRIVER_DESC "\n"); 807 return 0; 808} 809 810static void __exit cp210x_exit(void) 811{ 812 usb_deregister(&cp210x_driver); 813 usb_serial_deregister(&cp210x_device); 814} 815 816module_init(cp210x_init); 817module_exit(cp210x_exit); 818 819MODULE_DESCRIPTION(DRIVER_DESC); 820MODULE_VERSION(DRIVER_VERSION); 821MODULE_LICENSE("GPL"); 822 823module_param(debug, bool, S_IRUGO | S_IWUSR); 824MODULE_PARM_DESC(debug, "Enable verbose debugging messages"); 825