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 205 206 /* CP210X_IFC_ENABLE */ 207 #define UART_ENABLE 0x0001 208 #define UART_DISABLE 0x0000 209 210 /* CP210X_(SET|GET)_BAUDDIV */ 211 #define BAUD_RATE_GEN_FREQ 0x384000 212 213 /* CP210X_(SET|GET)_LINE_CTL */ 214 #define BITS_DATA_MASK 0X0f00 215 #define BITS_DATA_5 0X0500 216 #define BITS_DATA_6 0X0600 217 #define BITS_DATA_7 0X0700 218 #define BITS_DATA_8 0X0800 219 #define BITS_DATA_9 0X0900 220 221 #define BITS_PARITY_MASK 0x00f0 222 #define BITS_PARITY_NONE 0x0000 223 #define BITS_PARITY_ODD 0x0010 224 #define BITS_PARITY_EVEN 0x0020 225 #define BITS_PARITY_MARK 0x0030 226 #define BITS_PARITY_SPACE 0x0040 227 228 #define BITS_STOP_MASK 0x000f 229 #define BITS_STOP_1 0x0000 230 #define BITS_STOP_1_5 0x0001 231 #define BITS_STOP_2 0x0002 232 233 /* CP210X_SET_BREAK */ 234 #define BREAK_ON 0x0001 235 #define BREAK_OFF 0x0000 236 237 /* CP210X_(SET_MHS|GET_MDMSTS) */ 238 #define CONTROL_DTR 0x0001 239 #define CONTROL_RTS 0x0002 240 #define CONTROL_CTS 0x0010 241 #define CONTROL_DSR 0x0020 242 #define CONTROL_RING 0x0040 243 #define CONTROL_DCD 0x0080 244 #define CONTROL_WRITE_DTR 0x0100 245 #define CONTROL_WRITE_RTS 0x0200 246 247 /* 248 * cp210x_get_config 249 * Reads from the CP210x configuration registers 250 * 'size' is specified in bytes. 251 * 'data' is a pointer to a pre-allocated array of integers large 252 * enough to hold 'size' bytes (with 4 bytes to each integer) 253 */ 254 static int cp210x_get_config(struct usb_serial_port *port, u8 request, 255 unsigned int *data, int size) 256 { 257 struct usb_serial *serial = port->serial; 258 __le32 *buf; 259 int result, i, length; 260 261 /* Number of integers required to contain the array */ 262 length = (((size - 1) | 3) + 1)/4; 263 264 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL); 265 if (!buf) { 266 dev_err(&port->dev, "%s - out of memory.\n", __func__); 267 return -ENOMEM; 268 } 269 270 /* Issue the request, attempting to read 'size' bytes */ 271 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 272 request, REQTYPE_DEVICE_TO_HOST, 0x0000, 273 0, buf, size, 300); 274 275 /* Convert data into an array of integers */ 276 for (i = 0; i < length; i++) 277 data[i] = le32_to_cpu(buf[i]); 278 279 kfree(buf); 280 281 if (result != size) { 282 dbg("%s - Unable to send config request, " 283 "request=0x%x size=%d result=%d\n", 284 __func__, request, size, result); 285 if (result > 0) 286 result = -EPROTO; 287 288 return result; 289 } 290 291 return 0; 292 } 293 294 /* 295 * cp210x_set_config 296 * Writes to the CP210x configuration registers 297 * Values less than 16 bits wide are sent directly 298 * 'size' is specified in bytes. 299 */ 300 static int cp210x_set_config(struct usb_serial_port *port, u8 request, 301 unsigned int *data, int size) 302 { 303 struct usb_serial *serial = port->serial; 304 __le32 *buf; 305 int result, i, length; 306 307 /* Number of integers required to contain the array */ 308 length = (((size - 1) | 3) + 1)/4; 309 310 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL); 311 if (!buf) { 312 dev_err(&port->dev, "%s - out of memory.\n", 313 __func__); 314 return -ENOMEM; 315 } 316 317 /* Array of integers into bytes */ 318 for (i = 0; i < length; i++) 319 buf[i] = cpu_to_le32(data[i]); 320 321 if (size > 2) { 322 result = usb_control_msg(serial->dev, 323 usb_sndctrlpipe(serial->dev, 0), 324 request, REQTYPE_HOST_TO_DEVICE, 0x0000, 325 0, buf, size, 300); 326 } else { 327 result = usb_control_msg(serial->dev, 328 usb_sndctrlpipe(serial->dev, 0), 329 request, REQTYPE_HOST_TO_DEVICE, data[0], 330 0, NULL, 0, 300); 331 } 332 333 kfree(buf); 334 335 if ((size > 2 && result != size) || result < 0) { 336 dbg("%s - Unable to send request, " 337 "request=0x%x size=%d result=%d\n", 338 __func__, request, size, result); 339 if (result > 0) 340 result = -EPROTO; 341 342 return result; 343 } 344 345 return 0; 346 } 347 348 /* 349 * cp210x_set_config_single 350 * Convenience function for calling cp210x_set_config on single data values 351 * without requiring an integer pointer 352 */ 353 static inline int cp210x_set_config_single(struct usb_serial_port *port, 354 u8 request, unsigned int data) 355 { 356 return cp210x_set_config(port, request, &data, 2); 357 } 358 359 /* 360 * cp210x_quantise_baudrate 361 * Quantises the baud rate as per AN205 Table 1 362 */ 363 static unsigned int cp210x_quantise_baudrate(unsigned int baud) { 364 if (baud <= 56) baud = 0; 365 else if (baud <= 300) baud = 300; 366 else if (baud <= 600) baud = 600; 367 else if (baud <= 1200) baud = 1200; 368 else if (baud <= 1800) baud = 1800; 369 else if (baud <= 2400) baud = 2400; 370 else if (baud <= 4000) baud = 4000; 371 else if (baud <= 4803) baud = 4800; 372 else if (baud <= 7207) baud = 7200; 373 else if (baud <= 9612) baud = 9600; 374 else if (baud <= 14428) baud = 14400; 375 else if (baud <= 16062) baud = 16000; 376 else if (baud <= 19250) baud = 19200; 377 else if (baud <= 28912) baud = 28800; 378 else if (baud <= 38601) baud = 38400; 379 else if (baud <= 51558) baud = 51200; 380 else if (baud <= 56280) baud = 56000; 381 else if (baud <= 58053) baud = 57600; 382 else if (baud <= 64111) baud = 64000; 383 else if (baud <= 77608) baud = 76800; 384 else if (baud <= 117028) baud = 115200; 385 else if (baud <= 129347) baud = 128000; 386 else if (baud <= 156868) baud = 153600; 387 else if (baud <= 237832) baud = 230400; 388 else if (baud <= 254234) baud = 250000; 389 else if (baud <= 273066) baud = 256000; 390 else if (baud <= 491520) baud = 460800; 391 else if (baud <= 567138) baud = 500000; 392 else if (baud <= 670254) baud = 576000; 393 else if (baud <= 1053257) baud = 921600; 394 else if (baud <= 1474560) baud = 1228800; 395 else if (baud <= 2457600) baud = 1843200; 396 else baud = 3686400; 397 return baud; 398 } 399 400 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port) 401 { 402 int result; 403 404 dbg("%s - port %d", __func__, port->number); 405 406 result = cp210x_set_config_single(port, CP210X_IFC_ENABLE, 407 UART_ENABLE); 408 if (result) { 409 dev_err(&port->dev, "%s - Unable to enable UART\n", __func__); 410 return result; 411 } 412 413 result = usb_serial_generic_open(tty, port); 414 if (result) 415 return result; 416 417 /* Configure the termios structure */ 418 cp210x_get_termios(tty, port); 419 return 0; 420 } 421 422 static void cp210x_close(struct usb_serial_port *port) 423 { 424 dbg("%s - port %d", __func__, port->number); 425 426 usb_serial_generic_close(port); 427 428 mutex_lock(&port->serial->disc_mutex); 429 if (!port->serial->disconnected) 430 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE); 431 mutex_unlock(&port->serial->disc_mutex); 432 } 433 434 /* 435 * cp210x_get_termios 436 * Reads the baud rate, data bits, parity, stop bits and flow control mode 437 * from the device, corrects any unsupported values, and configures the 438 * termios structure to reflect the state of the device 439 */ 440 static void cp210x_get_termios(struct tty_struct *tty, 441 struct usb_serial_port *port) 442 { 443 unsigned int baud; 444 445 if (tty) { 446 cp210x_get_termios_port(tty->driver_data, 447 &tty->termios->c_cflag, &baud); 448 tty_encode_baud_rate(tty, baud, baud); 449 } 450 451 else { 452 unsigned int cflag; 453 cflag = 0; 454 cp210x_get_termios_port(port, &cflag, &baud); 455 } 456 } 457 458 /* 459 * cp210x_get_termios_port 460 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port. 461 */ 462 static void cp210x_get_termios_port(struct usb_serial_port *port, 463 unsigned int *cflagp, unsigned int *baudp) 464 { 465 unsigned int cflag, modem_ctl[4]; 466 unsigned int baud; 467 unsigned int bits; 468 469 dbg("%s - port %d", __func__, port->number); 470 471 cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2); 472 /* Convert to baudrate */ 473 if (baud) 474 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud); 475 476 dbg("%s - baud rate = %d", __func__, baud); 477 *baudp = baud; 478 479 cflag = *cflagp; 480 481 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 482 cflag &= ~CSIZE; 483 switch (bits & BITS_DATA_MASK) { 484 case BITS_DATA_5: 485 dbg("%s - data bits = 5", __func__); 486 cflag |= CS5; 487 break; 488 case BITS_DATA_6: 489 dbg("%s - data bits = 6", __func__); 490 cflag |= CS6; 491 break; 492 case BITS_DATA_7: 493 dbg("%s - data bits = 7", __func__); 494 cflag |= CS7; 495 break; 496 case BITS_DATA_8: 497 dbg("%s - data bits = 8", __func__); 498 cflag |= CS8; 499 break; 500 case BITS_DATA_9: 501 dbg("%s - data bits = 9 (not supported, using 8 data bits)", 502 __func__); 503 cflag |= CS8; 504 bits &= ~BITS_DATA_MASK; 505 bits |= BITS_DATA_8; 506 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 507 break; 508 default: 509 dbg("%s - Unknown number of data bits, using 8", __func__); 510 cflag |= CS8; 511 bits &= ~BITS_DATA_MASK; 512 bits |= BITS_DATA_8; 513 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 514 break; 515 } 516 517 switch (bits & BITS_PARITY_MASK) { 518 case BITS_PARITY_NONE: 519 dbg("%s - parity = NONE", __func__); 520 cflag &= ~PARENB; 521 break; 522 case BITS_PARITY_ODD: 523 dbg("%s - parity = ODD", __func__); 524 cflag |= (PARENB|PARODD); 525 break; 526 case BITS_PARITY_EVEN: 527 dbg("%s - parity = EVEN", __func__); 528 cflag &= ~PARODD; 529 cflag |= PARENB; 530 break; 531 case BITS_PARITY_MARK: 532 dbg("%s - parity = MARK", __func__); 533 cflag |= (PARENB|PARODD|CMSPAR); 534 break; 535 case BITS_PARITY_SPACE: 536 dbg("%s - parity = SPACE", __func__); 537 cflag &= ~PARODD; 538 cflag |= (PARENB|CMSPAR); 539 break; 540 default: 541 dbg("%s - Unknown parity mode, disabling parity", __func__); 542 cflag &= ~PARENB; 543 bits &= ~BITS_PARITY_MASK; 544 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 545 break; 546 } 547 548 cflag &= ~CSTOPB; 549 switch (bits & BITS_STOP_MASK) { 550 case BITS_STOP_1: 551 dbg("%s - stop bits = 1", __func__); 552 break; 553 case BITS_STOP_1_5: 554 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)", 555 __func__); 556 bits &= ~BITS_STOP_MASK; 557 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 558 break; 559 case BITS_STOP_2: 560 dbg("%s - stop bits = 2", __func__); 561 cflag |= CSTOPB; 562 break; 563 default: 564 dbg("%s - Unknown number of stop bits, using 1 stop bit", 565 __func__); 566 bits &= ~BITS_STOP_MASK; 567 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 568 break; 569 } 570 571 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 572 if (modem_ctl[0] & 0x0008) { 573 dbg("%s - flow control = CRTSCTS", __func__); 574 cflag |= CRTSCTS; 575 } else { 576 dbg("%s - flow control = NONE", __func__); 577 cflag &= ~CRTSCTS; 578 } 579 580 *cflagp = cflag; 581 } 582 583 static void cp210x_set_termios(struct tty_struct *tty, 584 struct usb_serial_port *port, struct ktermios *old_termios) 585 { 586 unsigned int cflag, old_cflag; 587 unsigned int baud = 0, bits; 588 unsigned int modem_ctl[4]; 589 590 dbg("%s - port %d", __func__, port->number); 591 592 if (!tty) 593 return; 594 595 cflag = tty->termios->c_cflag; 596 old_cflag = old_termios->c_cflag; 597 baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty)); 598 599 /* If the baud rate is to be updated*/ 600 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) { 601 dbg("%s - Setting baud rate to %d baud", __func__, 602 baud); 603 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV, 604 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) { 605 dbg("Baud rate requested not supported by device"); 606 baud = tty_termios_baud_rate(old_termios); 607 } 608 } 609 /* Report back the resulting baud rate */ 610 tty_encode_baud_rate(tty, baud, baud); 611 612 /* If the number of data bits is to be updated */ 613 if ((cflag & CSIZE) != (old_cflag & CSIZE)) { 614 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 615 bits &= ~BITS_DATA_MASK; 616 switch (cflag & CSIZE) { 617 case CS5: 618 bits |= BITS_DATA_5; 619 dbg("%s - data bits = 5", __func__); 620 break; 621 case CS6: 622 bits |= BITS_DATA_6; 623 dbg("%s - data bits = 6", __func__); 624 break; 625 case CS7: 626 bits |= BITS_DATA_7; 627 dbg("%s - data bits = 7", __func__); 628 break; 629 case CS8: 630 bits |= BITS_DATA_8; 631 dbg("%s - data bits = 8", __func__); 632 break; 633 /*case CS9: 634 bits |= BITS_DATA_9; 635 dbg("%s - data bits = 9", __func__); 636 break;*/ 637 default: 638 dbg("cp210x driver does not " 639 "support the number of bits requested," 640 " using 8 bit mode\n"); 641 bits |= BITS_DATA_8; 642 break; 643 } 644 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 645 dbg("Number of data bits requested " 646 "not supported by device\n"); 647 } 648 649 if ((cflag & (PARENB|PARODD|CMSPAR)) != 650 (old_cflag & (PARENB|PARODD|CMSPAR))) { 651 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 652 bits &= ~BITS_PARITY_MASK; 653 if (cflag & PARENB) { 654 if (cflag & CMSPAR) { 655 if (cflag & PARODD) { 656 bits |= BITS_PARITY_MARK; 657 dbg("%s - parity = MARK", __func__); 658 } else { 659 bits |= BITS_PARITY_SPACE; 660 dbg("%s - parity = SPACE", __func__); 661 } 662 } else { 663 if (cflag & PARODD) { 664 bits |= BITS_PARITY_ODD; 665 dbg("%s - parity = ODD", __func__); 666 } else { 667 bits |= BITS_PARITY_EVEN; 668 dbg("%s - parity = EVEN", __func__); 669 } 670 } 671 } 672 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 673 dbg("Parity mode not supported " 674 "by device\n"); 675 } 676 677 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { 678 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 679 bits &= ~BITS_STOP_MASK; 680 if (cflag & CSTOPB) { 681 bits |= BITS_STOP_2; 682 dbg("%s - stop bits = 2", __func__); 683 } else { 684 bits |= BITS_STOP_1; 685 dbg("%s - stop bits = 1", __func__); 686 } 687 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 688 dbg("Number of stop bits requested " 689 "not supported by device\n"); 690 } 691 692 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { 693 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 694 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", 695 __func__, modem_ctl[0], modem_ctl[1], 696 modem_ctl[2], modem_ctl[3]); 697 698 if (cflag & CRTSCTS) { 699 modem_ctl[0] &= ~0x7B; 700 modem_ctl[0] |= 0x09; 701 modem_ctl[1] = 0x80; 702 dbg("%s - flow control = CRTSCTS", __func__); 703 } else { 704 modem_ctl[0] &= ~0x7B; 705 modem_ctl[0] |= 0x01; 706 modem_ctl[1] |= 0x40; 707 dbg("%s - flow control = NONE", __func__); 708 } 709 710 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", 711 __func__, modem_ctl[0], modem_ctl[1], 712 modem_ctl[2], modem_ctl[3]); 713 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16); 714 } 715 716 } 717 718 static int cp210x_tiocmset (struct tty_struct *tty, 719 unsigned int set, unsigned int clear) 720 { 721 struct usb_serial_port *port = tty->driver_data; 722 return cp210x_tiocmset_port(port, set, clear); 723 } 724 725 static int cp210x_tiocmset_port(struct usb_serial_port *port, 726 unsigned int set, unsigned int clear) 727 { 728 unsigned int control = 0; 729 730 dbg("%s - port %d", __func__, port->number); 731 732 if (set & TIOCM_RTS) { 733 control |= CONTROL_RTS; 734 control |= CONTROL_WRITE_RTS; 735 } 736 if (set & TIOCM_DTR) { 737 control |= CONTROL_DTR; 738 control |= CONTROL_WRITE_DTR; 739 } 740 if (clear & TIOCM_RTS) { 741 control &= ~CONTROL_RTS; 742 control |= CONTROL_WRITE_RTS; 743 } 744 if (clear & TIOCM_DTR) { 745 control &= ~CONTROL_DTR; 746 control |= CONTROL_WRITE_DTR; 747 } 748 749 dbg("%s - control = 0x%.4x", __func__, control); 750 751 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2); 752 } 753 754 static void cp210x_dtr_rts(struct usb_serial_port *p, int on) 755 { 756 if (on) 757 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0); 758 else 759 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS); 760 } 761 762 static int cp210x_tiocmget (struct tty_struct *tty) 763 { 764 struct usb_serial_port *port = tty->driver_data; 765 unsigned int control; 766 int result; 767 768 dbg("%s - port %d", __func__, port->number); 769 770 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1); 771 772 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) 773 |((control & CONTROL_RTS) ? TIOCM_RTS : 0) 774 |((control & CONTROL_CTS) ? TIOCM_CTS : 0) 775 |((control & CONTROL_DSR) ? TIOCM_DSR : 0) 776 |((control & CONTROL_RING)? TIOCM_RI : 0) 777 |((control & CONTROL_DCD) ? TIOCM_CD : 0); 778 779 dbg("%s - control = 0x%.2x", __func__, control); 780 781 return result; 782 } 783 784 static void cp210x_break_ctl (struct tty_struct *tty, int break_state) 785 { 786 struct usb_serial_port *port = tty->driver_data; 787 unsigned int state; 788 789 dbg("%s - port %d", __func__, port->number); 790 if (break_state == 0) 791 state = BREAK_OFF; 792 else 793 state = BREAK_ON; 794 dbg("%s - turning break %s", __func__, 795 state == BREAK_OFF ? "off" : "on"); 796 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2); 797 } 798 799 static int cp210x_startup(struct usb_serial *serial) 800 { 801 /* cp210x buffers behave strangely unless device is reset */ 802 usb_reset_device(serial->dev); 803 return 0; 804 } 805 806 static int __init cp210x_init(void) 807 { 808 int retval; 809 810 retval = usb_serial_register(&cp210x_device); 811 if (retval) 812 return retval; /* Failed to register */ 813 814 retval = usb_register(&cp210x_driver); 815 if (retval) { 816 /* Failed to register */ 817 usb_serial_deregister(&cp210x_device); 818 return retval; 819 } 820 821 /* Success */ 822 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 823 DRIVER_DESC "\n"); 824 return 0; 825 } 826 827 static void __exit cp210x_exit(void) 828 { 829 usb_deregister(&cp210x_driver); 830 usb_serial_deregister(&cp210x_device); 831 } 832 833 module_init(cp210x_init); 834 module_exit(cp210x_exit); 835 836 MODULE_DESCRIPTION(DRIVER_DESC); 837 MODULE_VERSION(DRIVER_VERSION); 838 MODULE_LICENSE("GPL"); 839 840 module_param(debug, bool, S_IRUGO | S_IWUSR); 841 MODULE_PARM_DESC(debug, "Enable verbose debugging messages"); 842