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 */ 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_set_termios(struct tty_struct *, struct usb_serial_port *, 43 struct ktermios*); 44 static int cp210x_tiocmget(struct tty_struct *); 45 static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int); 46 static int cp210x_tiocmset_port(struct usb_serial_port *port, 47 unsigned int, unsigned int); 48 static void cp210x_break_ctl(struct tty_struct *, int); 49 static int cp210x_startup(struct usb_serial *); 50 static void cp210x_dtr_rts(struct usb_serial_port *p, int on); 51 52 static bool debug; 53 54 static const struct usb_device_id id_table[] = { 55 { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */ 56 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */ 57 { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */ 58 { USB_DEVICE(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */ 59 { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */ 60 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */ 61 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */ 62 { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */ 63 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */ 64 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */ 65 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */ 66 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */ 67 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */ 68 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */ 69 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */ 70 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */ 71 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */ 72 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */ 73 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */ 74 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */ 75 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */ 76 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */ 77 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */ 78 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */ 79 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */ 80 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */ 81 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */ 82 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */ 83 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */ 84 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */ 85 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */ 86 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */ 87 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */ 88 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */ 89 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */ 90 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */ 91 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */ 92 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */ 93 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */ 94 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */ 95 { USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */ 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 demonstration module */ 106 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis 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, 0x85EA) }, /* AC-Services IBUS-IF */ 117 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */ 118 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */ 119 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */ 120 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ 121 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ 122 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */ 123 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */ 124 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */ 125 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */ 126 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */ 127 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ 128 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */ 129 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ 130 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */ 131 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ 132 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ 133 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */ 134 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */ 135 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */ 136 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */ 137 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */ 138 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */ 139 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */ 140 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */ 141 { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */ 142 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */ 143 { } /* Terminating Entry */ 144 }; 145 146 MODULE_DEVICE_TABLE(usb, id_table); 147 148 static struct usb_driver cp210x_driver = { 149 .name = "cp210x", 150 .probe = usb_serial_probe, 151 .disconnect = usb_serial_disconnect, 152 .id_table = id_table, 153 .no_dynamic_id = 1, 154 }; 155 156 static struct usb_serial_driver cp210x_device = { 157 .driver = { 158 .owner = THIS_MODULE, 159 .name = "cp210x", 160 }, 161 .usb_driver = &cp210x_driver, 162 .id_table = id_table, 163 .num_ports = 1, 164 .bulk_in_size = 256, 165 .bulk_out_size = 256, 166 .open = cp210x_open, 167 .close = cp210x_close, 168 .break_ctl = cp210x_break_ctl, 169 .set_termios = cp210x_set_termios, 170 .tiocmget = cp210x_tiocmget, 171 .tiocmset = cp210x_tiocmset, 172 .attach = cp210x_startup, 173 .dtr_rts = cp210x_dtr_rts 174 }; 175 176 /* Config request types */ 177 #define REQTYPE_HOST_TO_DEVICE 0x41 178 #define REQTYPE_DEVICE_TO_HOST 0xc1 179 180 /* Config request codes */ 181 #define CP210X_IFC_ENABLE 0x00 182 #define CP210X_SET_BAUDDIV 0x01 183 #define CP210X_GET_BAUDDIV 0x02 184 #define CP210X_SET_LINE_CTL 0x03 185 #define CP210X_GET_LINE_CTL 0x04 186 #define CP210X_SET_BREAK 0x05 187 #define CP210X_IMM_CHAR 0x06 188 #define CP210X_SET_MHS 0x07 189 #define CP210X_GET_MDMSTS 0x08 190 #define CP210X_SET_XON 0x09 191 #define CP210X_SET_XOFF 0x0A 192 #define CP210X_SET_EVENTMASK 0x0B 193 #define CP210X_GET_EVENTMASK 0x0C 194 #define CP210X_SET_CHAR 0x0D 195 #define CP210X_GET_CHARS 0x0E 196 #define CP210X_GET_PROPS 0x0F 197 #define CP210X_GET_COMM_STATUS 0x10 198 #define CP210X_RESET 0x11 199 #define CP210X_PURGE 0x12 200 #define CP210X_SET_FLOW 0x13 201 #define CP210X_GET_FLOW 0x14 202 #define CP210X_EMBED_EVENTS 0x15 203 #define CP210X_GET_EVENTSTATE 0x16 204 #define CP210X_SET_CHARS 0x19 205 #define CP210X_GET_BAUDRATE 0x1D 206 #define CP210X_SET_BAUDRATE 0x1E 207 208 /* CP210X_IFC_ENABLE */ 209 #define UART_ENABLE 0x0001 210 #define UART_DISABLE 0x0000 211 212 /* CP210X_(SET|GET)_BAUDDIV */ 213 #define BAUD_RATE_GEN_FREQ 0x384000 214 215 /* CP210X_(SET|GET)_LINE_CTL */ 216 #define BITS_DATA_MASK 0X0f00 217 #define BITS_DATA_5 0X0500 218 #define BITS_DATA_6 0X0600 219 #define BITS_DATA_7 0X0700 220 #define BITS_DATA_8 0X0800 221 #define BITS_DATA_9 0X0900 222 223 #define BITS_PARITY_MASK 0x00f0 224 #define BITS_PARITY_NONE 0x0000 225 #define BITS_PARITY_ODD 0x0010 226 #define BITS_PARITY_EVEN 0x0020 227 #define BITS_PARITY_MARK 0x0030 228 #define BITS_PARITY_SPACE 0x0040 229 230 #define BITS_STOP_MASK 0x000f 231 #define BITS_STOP_1 0x0000 232 #define BITS_STOP_1_5 0x0001 233 #define BITS_STOP_2 0x0002 234 235 /* CP210X_SET_BREAK */ 236 #define BREAK_ON 0x0001 237 #define BREAK_OFF 0x0000 238 239 /* CP210X_(SET_MHS|GET_MDMSTS) */ 240 #define CONTROL_DTR 0x0001 241 #define CONTROL_RTS 0x0002 242 #define CONTROL_CTS 0x0010 243 #define CONTROL_DSR 0x0020 244 #define CONTROL_RING 0x0040 245 #define CONTROL_DCD 0x0080 246 #define CONTROL_WRITE_DTR 0x0100 247 #define CONTROL_WRITE_RTS 0x0200 248 249 /* 250 * cp210x_get_config 251 * Reads from the CP210x configuration registers 252 * 'size' is specified in bytes. 253 * 'data' is a pointer to a pre-allocated array of integers large 254 * enough to hold 'size' bytes (with 4 bytes to each integer) 255 */ 256 static int cp210x_get_config(struct usb_serial_port *port, u8 request, 257 unsigned int *data, int size) 258 { 259 struct usb_serial *serial = port->serial; 260 __le32 *buf; 261 int result, i, length; 262 263 /* Number of integers required to contain the array */ 264 length = (((size - 1) | 3) + 1)/4; 265 266 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL); 267 if (!buf) { 268 dev_err(&port->dev, "%s - out of memory.\n", __func__); 269 return -ENOMEM; 270 } 271 272 /* Issue the request, attempting to read 'size' bytes */ 273 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 274 request, REQTYPE_DEVICE_TO_HOST, 0x0000, 275 0, buf, size, 300); 276 277 /* Convert data into an array of integers */ 278 for (i = 0; i < length; i++) 279 data[i] = le32_to_cpu(buf[i]); 280 281 kfree(buf); 282 283 if (result != size) { 284 dbg("%s - Unable to send config request, " 285 "request=0x%x size=%d result=%d\n", 286 __func__, request, size, result); 287 if (result > 0) 288 result = -EPROTO; 289 290 return result; 291 } 292 293 return 0; 294 } 295 296 /* 297 * cp210x_set_config 298 * Writes to the CP210x configuration registers 299 * Values less than 16 bits wide are sent directly 300 * 'size' is specified in bytes. 301 */ 302 static int cp210x_set_config(struct usb_serial_port *port, u8 request, 303 unsigned int *data, int size) 304 { 305 struct usb_serial *serial = port->serial; 306 __le32 *buf; 307 int result, i, length; 308 309 /* Number of integers required to contain the array */ 310 length = (((size - 1) | 3) + 1)/4; 311 312 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL); 313 if (!buf) { 314 dev_err(&port->dev, "%s - out of memory.\n", 315 __func__); 316 return -ENOMEM; 317 } 318 319 /* Array of integers into bytes */ 320 for (i = 0; i < length; i++) 321 buf[i] = cpu_to_le32(data[i]); 322 323 if (size > 2) { 324 result = usb_control_msg(serial->dev, 325 usb_sndctrlpipe(serial->dev, 0), 326 request, REQTYPE_HOST_TO_DEVICE, 0x0000, 327 0, buf, size, 300); 328 } else { 329 result = usb_control_msg(serial->dev, 330 usb_sndctrlpipe(serial->dev, 0), 331 request, REQTYPE_HOST_TO_DEVICE, data[0], 332 0, NULL, 0, 300); 333 } 334 335 kfree(buf); 336 337 if ((size > 2 && result != size) || result < 0) { 338 dbg("%s - Unable to send request, " 339 "request=0x%x size=%d result=%d\n", 340 __func__, request, size, result); 341 if (result > 0) 342 result = -EPROTO; 343 344 return result; 345 } 346 347 return 0; 348 } 349 350 /* 351 * cp210x_set_config_single 352 * Convenience function for calling cp210x_set_config on single data values 353 * without requiring an integer pointer 354 */ 355 static inline int cp210x_set_config_single(struct usb_serial_port *port, 356 u8 request, unsigned int data) 357 { 358 return cp210x_set_config(port, request, &data, 2); 359 } 360 361 /* 362 * cp210x_quantise_baudrate 363 * Quantises the baud rate as per AN205 Table 1 364 */ 365 static unsigned int cp210x_quantise_baudrate(unsigned int baud) { 366 if (baud <= 56) baud = 0; 367 else if (baud <= 300) baud = 300; 368 else if (baud <= 600) baud = 600; 369 else if (baud <= 1200) baud = 1200; 370 else if (baud <= 1800) baud = 1800; 371 else if (baud <= 2400) baud = 2400; 372 else if (baud <= 4000) baud = 4000; 373 else if (baud <= 4803) baud = 4800; 374 else if (baud <= 7207) baud = 7200; 375 else if (baud <= 9612) baud = 9600; 376 else if (baud <= 14428) baud = 14400; 377 else if (baud <= 16062) baud = 16000; 378 else if (baud <= 19250) baud = 19200; 379 else if (baud <= 28912) baud = 28800; 380 else if (baud <= 38601) baud = 38400; 381 else if (baud <= 51558) baud = 51200; 382 else if (baud <= 56280) baud = 56000; 383 else if (baud <= 58053) baud = 57600; 384 else if (baud <= 64111) baud = 64000; 385 else if (baud <= 77608) baud = 76800; 386 else if (baud <= 117028) baud = 115200; 387 else if (baud <= 129347) baud = 128000; 388 else if (baud <= 156868) baud = 153600; 389 else if (baud <= 237832) baud = 230400; 390 else if (baud <= 254234) baud = 250000; 391 else if (baud <= 273066) baud = 256000; 392 else if (baud <= 491520) baud = 460800; 393 else if (baud <= 567138) baud = 500000; 394 else if (baud <= 670254) baud = 576000; 395 else if (baud <= 1053257) baud = 921600; 396 else if (baud <= 1474560) baud = 1228800; 397 else if (baud <= 2457600) baud = 1843200; 398 else baud = 3686400; 399 return baud; 400 } 401 402 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port) 403 { 404 int result; 405 406 dbg("%s - port %d", __func__, port->number); 407 408 result = cp210x_set_config_single(port, CP210X_IFC_ENABLE, 409 UART_ENABLE); 410 if (result) { 411 dev_err(&port->dev, "%s - Unable to enable UART\n", __func__); 412 return result; 413 } 414 415 /* Configure the termios structure */ 416 cp210x_get_termios(tty, port); 417 418 return usb_serial_generic_open(tty, port); 419 } 420 421 static void cp210x_close(struct usb_serial_port *port) 422 { 423 dbg("%s - port %d", __func__, port->number); 424 425 usb_serial_generic_close(port); 426 427 mutex_lock(&port->serial->disc_mutex); 428 if (!port->serial->disconnected) 429 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE); 430 mutex_unlock(&port->serial->disc_mutex); 431 } 432 433 /* 434 * cp210x_get_termios 435 * Reads the baud rate, data bits, parity, stop bits and flow control mode 436 * from the device, corrects any unsupported values, and configures the 437 * termios structure to reflect the state of the device 438 */ 439 static void cp210x_get_termios(struct tty_struct *tty, 440 struct usb_serial_port *port) 441 { 442 unsigned int baud; 443 444 if (tty) { 445 cp210x_get_termios_port(tty->driver_data, 446 &tty->termios->c_cflag, &baud); 447 tty_encode_baud_rate(tty, baud, baud); 448 } 449 450 else { 451 unsigned int cflag; 452 cflag = 0; 453 cp210x_get_termios_port(port, &cflag, &baud); 454 } 455 } 456 457 /* 458 * cp210x_get_termios_port 459 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port. 460 */ 461 static void cp210x_get_termios_port(struct usb_serial_port *port, 462 unsigned int *cflagp, unsigned int *baudp) 463 { 464 unsigned int cflag, modem_ctl[4]; 465 unsigned int baud; 466 unsigned int bits; 467 468 dbg("%s - port %d", __func__, port->number); 469 470 cp210x_get_config(port, CP210X_GET_BAUDRATE, &baud, 4); 471 472 dbg("%s - baud rate = %d", __func__, baud); 473 *baudp = baud; 474 475 cflag = *cflagp; 476 477 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 478 cflag &= ~CSIZE; 479 switch (bits & BITS_DATA_MASK) { 480 case BITS_DATA_5: 481 dbg("%s - data bits = 5", __func__); 482 cflag |= CS5; 483 break; 484 case BITS_DATA_6: 485 dbg("%s - data bits = 6", __func__); 486 cflag |= CS6; 487 break; 488 case BITS_DATA_7: 489 dbg("%s - data bits = 7", __func__); 490 cflag |= CS7; 491 break; 492 case BITS_DATA_8: 493 dbg("%s - data bits = 8", __func__); 494 cflag |= CS8; 495 break; 496 case BITS_DATA_9: 497 dbg("%s - data bits = 9 (not supported, using 8 data bits)", 498 __func__); 499 cflag |= CS8; 500 bits &= ~BITS_DATA_MASK; 501 bits |= BITS_DATA_8; 502 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 503 break; 504 default: 505 dbg("%s - Unknown number of data bits, using 8", __func__); 506 cflag |= CS8; 507 bits &= ~BITS_DATA_MASK; 508 bits |= BITS_DATA_8; 509 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 510 break; 511 } 512 513 switch (bits & BITS_PARITY_MASK) { 514 case BITS_PARITY_NONE: 515 dbg("%s - parity = NONE", __func__); 516 cflag &= ~PARENB; 517 break; 518 case BITS_PARITY_ODD: 519 dbg("%s - parity = ODD", __func__); 520 cflag |= (PARENB|PARODD); 521 break; 522 case BITS_PARITY_EVEN: 523 dbg("%s - parity = EVEN", __func__); 524 cflag &= ~PARODD; 525 cflag |= PARENB; 526 break; 527 case BITS_PARITY_MARK: 528 dbg("%s - parity = MARK", __func__); 529 cflag |= (PARENB|PARODD|CMSPAR); 530 break; 531 case BITS_PARITY_SPACE: 532 dbg("%s - parity = SPACE", __func__); 533 cflag &= ~PARODD; 534 cflag |= (PARENB|CMSPAR); 535 break; 536 default: 537 dbg("%s - Unknown parity mode, disabling parity", __func__); 538 cflag &= ~PARENB; 539 bits &= ~BITS_PARITY_MASK; 540 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 541 break; 542 } 543 544 cflag &= ~CSTOPB; 545 switch (bits & BITS_STOP_MASK) { 546 case BITS_STOP_1: 547 dbg("%s - stop bits = 1", __func__); 548 break; 549 case BITS_STOP_1_5: 550 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)", 551 __func__); 552 bits &= ~BITS_STOP_MASK; 553 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 554 break; 555 case BITS_STOP_2: 556 dbg("%s - stop bits = 2", __func__); 557 cflag |= CSTOPB; 558 break; 559 default: 560 dbg("%s - Unknown number of stop bits, using 1 stop bit", 561 __func__); 562 bits &= ~BITS_STOP_MASK; 563 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 564 break; 565 } 566 567 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 568 if (modem_ctl[0] & 0x0008) { 569 dbg("%s - flow control = CRTSCTS", __func__); 570 cflag |= CRTSCTS; 571 } else { 572 dbg("%s - flow control = NONE", __func__); 573 cflag &= ~CRTSCTS; 574 } 575 576 *cflagp = cflag; 577 } 578 579 static void cp210x_set_termios(struct tty_struct *tty, 580 struct usb_serial_port *port, struct ktermios *old_termios) 581 { 582 unsigned int cflag, old_cflag; 583 unsigned int baud = 0, bits; 584 unsigned int modem_ctl[4]; 585 586 dbg("%s - port %d", __func__, port->number); 587 588 if (!tty) 589 return; 590 591 cflag = tty->termios->c_cflag; 592 old_cflag = old_termios->c_cflag; 593 baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty)); 594 595 /* If the baud rate is to be updated*/ 596 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) { 597 dbg("%s - Setting baud rate to %d baud", __func__, 598 baud); 599 if (cp210x_set_config(port, CP210X_SET_BAUDRATE, &baud, 4)) { 600 dbg("Baud rate requested not supported by device"); 601 baud = tty_termios_baud_rate(old_termios); 602 } 603 } 604 /* Report back the resulting baud rate */ 605 tty_encode_baud_rate(tty, baud, baud); 606 607 /* If the number of data bits is to be updated */ 608 if ((cflag & CSIZE) != (old_cflag & CSIZE)) { 609 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 610 bits &= ~BITS_DATA_MASK; 611 switch (cflag & CSIZE) { 612 case CS5: 613 bits |= BITS_DATA_5; 614 dbg("%s - data bits = 5", __func__); 615 break; 616 case CS6: 617 bits |= BITS_DATA_6; 618 dbg("%s - data bits = 6", __func__); 619 break; 620 case CS7: 621 bits |= BITS_DATA_7; 622 dbg("%s - data bits = 7", __func__); 623 break; 624 case CS8: 625 bits |= BITS_DATA_8; 626 dbg("%s - data bits = 8", __func__); 627 break; 628 /*case CS9: 629 bits |= BITS_DATA_9; 630 dbg("%s - data bits = 9", __func__); 631 break;*/ 632 default: 633 dbg("cp210x driver does not " 634 "support the number of bits requested," 635 " using 8 bit mode\n"); 636 bits |= BITS_DATA_8; 637 break; 638 } 639 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 640 dbg("Number of data bits requested " 641 "not supported by device\n"); 642 } 643 644 if ((cflag & (PARENB|PARODD|CMSPAR)) != 645 (old_cflag & (PARENB|PARODD|CMSPAR))) { 646 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 647 bits &= ~BITS_PARITY_MASK; 648 if (cflag & PARENB) { 649 if (cflag & CMSPAR) { 650 if (cflag & PARODD) { 651 bits |= BITS_PARITY_MARK; 652 dbg("%s - parity = MARK", __func__); 653 } else { 654 bits |= BITS_PARITY_SPACE; 655 dbg("%s - parity = SPACE", __func__); 656 } 657 } else { 658 if (cflag & PARODD) { 659 bits |= BITS_PARITY_ODD; 660 dbg("%s - parity = ODD", __func__); 661 } else { 662 bits |= BITS_PARITY_EVEN; 663 dbg("%s - parity = EVEN", __func__); 664 } 665 } 666 } 667 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 668 dbg("Parity mode not supported " 669 "by device\n"); 670 } 671 672 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { 673 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 674 bits &= ~BITS_STOP_MASK; 675 if (cflag & CSTOPB) { 676 bits |= BITS_STOP_2; 677 dbg("%s - stop bits = 2", __func__); 678 } else { 679 bits |= BITS_STOP_1; 680 dbg("%s - stop bits = 1", __func__); 681 } 682 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 683 dbg("Number of stop bits requested " 684 "not supported by device\n"); 685 } 686 687 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { 688 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 689 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", 690 __func__, modem_ctl[0], modem_ctl[1], 691 modem_ctl[2], modem_ctl[3]); 692 693 if (cflag & CRTSCTS) { 694 modem_ctl[0] &= ~0x7B; 695 modem_ctl[0] |= 0x09; 696 modem_ctl[1] = 0x80; 697 dbg("%s - flow control = CRTSCTS", __func__); 698 } else { 699 modem_ctl[0] &= ~0x7B; 700 modem_ctl[0] |= 0x01; 701 modem_ctl[1] |= 0x40; 702 dbg("%s - flow control = NONE", __func__); 703 } 704 705 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", 706 __func__, modem_ctl[0], modem_ctl[1], 707 modem_ctl[2], modem_ctl[3]); 708 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16); 709 } 710 711 } 712 713 static int cp210x_tiocmset (struct tty_struct *tty, 714 unsigned int set, unsigned int clear) 715 { 716 struct usb_serial_port *port = tty->driver_data; 717 return cp210x_tiocmset_port(port, set, clear); 718 } 719 720 static int cp210x_tiocmset_port(struct usb_serial_port *port, 721 unsigned int set, unsigned int clear) 722 { 723 unsigned int control = 0; 724 725 dbg("%s - port %d", __func__, port->number); 726 727 if (set & TIOCM_RTS) { 728 control |= CONTROL_RTS; 729 control |= CONTROL_WRITE_RTS; 730 } 731 if (set & TIOCM_DTR) { 732 control |= CONTROL_DTR; 733 control |= CONTROL_WRITE_DTR; 734 } 735 if (clear & TIOCM_RTS) { 736 control &= ~CONTROL_RTS; 737 control |= CONTROL_WRITE_RTS; 738 } 739 if (clear & TIOCM_DTR) { 740 control &= ~CONTROL_DTR; 741 control |= CONTROL_WRITE_DTR; 742 } 743 744 dbg("%s - control = 0x%.4x", __func__, control); 745 746 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2); 747 } 748 749 static void cp210x_dtr_rts(struct usb_serial_port *p, int on) 750 { 751 if (on) 752 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0); 753 else 754 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS); 755 } 756 757 static int cp210x_tiocmget (struct tty_struct *tty) 758 { 759 struct usb_serial_port *port = tty->driver_data; 760 unsigned int control; 761 int result; 762 763 dbg("%s - port %d", __func__, port->number); 764 765 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1); 766 767 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) 768 |((control & CONTROL_RTS) ? TIOCM_RTS : 0) 769 |((control & CONTROL_CTS) ? TIOCM_CTS : 0) 770 |((control & CONTROL_DSR) ? TIOCM_DSR : 0) 771 |((control & CONTROL_RING)? TIOCM_RI : 0) 772 |((control & CONTROL_DCD) ? TIOCM_CD : 0); 773 774 dbg("%s - control = 0x%.2x", __func__, control); 775 776 return result; 777 } 778 779 static void cp210x_break_ctl (struct tty_struct *tty, int break_state) 780 { 781 struct usb_serial_port *port = tty->driver_data; 782 unsigned int state; 783 784 dbg("%s - port %d", __func__, port->number); 785 if (break_state == 0) 786 state = BREAK_OFF; 787 else 788 state = BREAK_ON; 789 dbg("%s - turning break %s", __func__, 790 state == BREAK_OFF ? "off" : "on"); 791 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2); 792 } 793 794 static int cp210x_startup(struct usb_serial *serial) 795 { 796 /* cp210x buffers behave strangely unless device is reset */ 797 usb_reset_device(serial->dev); 798 return 0; 799 } 800 801 static int __init cp210x_init(void) 802 { 803 int retval; 804 805 retval = usb_serial_register(&cp210x_device); 806 if (retval) 807 return retval; /* Failed to register */ 808 809 retval = usb_register(&cp210x_driver); 810 if (retval) { 811 /* Failed to register */ 812 usb_serial_deregister(&cp210x_device); 813 return retval; 814 } 815 816 /* Success */ 817 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 818 DRIVER_DESC "\n"); 819 return 0; 820 } 821 822 static void __exit cp210x_exit(void) 823 { 824 usb_deregister(&cp210x_driver); 825 usb_serial_deregister(&cp210x_device); 826 } 827 828 module_init(cp210x_init); 829 module_exit(cp210x_exit); 830 831 MODULE_DESCRIPTION(DRIVER_DESC); 832 MODULE_VERSION(DRIVER_VERSION); 833 MODULE_LICENSE("GPL"); 834 835 module_param(debug, bool, S_IRUGO | S_IWUSR); 836 MODULE_PARM_DESC(debug, "Enable verbose debugging messages"); 837