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 *, struct file *); 45 static int cp210x_tiocmset(struct tty_struct *, struct file *, 46 unsigned int, unsigned int); 47 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *, 48 unsigned int, unsigned int); 49 static void cp210x_break_ctl(struct tty_struct *, int); 50 static int cp210x_startup(struct usb_serial *); 51 static void cp210x_dtr_rts(struct usb_serial_port *p, int on); 52 static int cp210x_carrier_raised(struct usb_serial_port *p); 53 54 static int debug; 55 56 static const struct usb_device_id id_table[] = { 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(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, 0x8149) }, /* West Mountain Radio Computerized Battery Analyzer */ 89 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */ 90 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */ 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, 0x81AC) }, /* MSD Dash Hawk */ 96 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */ 97 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */ 98 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */ 99 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */ 100 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */ 101 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */ 102 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */ 103 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */ 104 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */ 105 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesys ETRX2USB */ 106 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */ 107 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */ 108 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */ 109 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */ 110 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */ 111 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */ 112 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ 113 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ 114 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */ 115 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */ 116 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */ 117 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */ 118 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */ 119 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ 120 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */ 121 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ 122 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */ 123 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ 124 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ 125 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */ 126 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */ 127 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */ 128 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */ 129 { } /* Terminating Entry */ 130 }; 131 132 MODULE_DEVICE_TABLE(usb, id_table); 133 134 static struct usb_driver cp210x_driver = { 135 .name = "cp210x", 136 .probe = usb_serial_probe, 137 .disconnect = usb_serial_disconnect, 138 .id_table = id_table, 139 .no_dynamic_id = 1, 140 }; 141 142 static struct usb_serial_driver cp210x_device = { 143 .driver = { 144 .owner = THIS_MODULE, 145 .name = "cp210x", 146 }, 147 .usb_driver = &cp210x_driver, 148 .id_table = id_table, 149 .num_ports = 1, 150 .bulk_in_size = 256, 151 .bulk_out_size = 256, 152 .open = cp210x_open, 153 .close = cp210x_close, 154 .break_ctl = cp210x_break_ctl, 155 .set_termios = cp210x_set_termios, 156 .tiocmget = cp210x_tiocmget, 157 .tiocmset = cp210x_tiocmset, 158 .attach = cp210x_startup, 159 .dtr_rts = cp210x_dtr_rts, 160 .carrier_raised = cp210x_carrier_raised 161 }; 162 163 /* Config request types */ 164 #define REQTYPE_HOST_TO_DEVICE 0x41 165 #define REQTYPE_DEVICE_TO_HOST 0xc1 166 167 /* Config request codes */ 168 #define CP210X_IFC_ENABLE 0x00 169 #define CP210X_SET_BAUDDIV 0x01 170 #define CP210X_GET_BAUDDIV 0x02 171 #define CP210X_SET_LINE_CTL 0x03 172 #define CP210X_GET_LINE_CTL 0x04 173 #define CP210X_SET_BREAK 0x05 174 #define CP210X_IMM_CHAR 0x06 175 #define CP210X_SET_MHS 0x07 176 #define CP210X_GET_MDMSTS 0x08 177 #define CP210X_SET_XON 0x09 178 #define CP210X_SET_XOFF 0x0A 179 #define CP210X_SET_EVENTMASK 0x0B 180 #define CP210X_GET_EVENTMASK 0x0C 181 #define CP210X_SET_CHAR 0x0D 182 #define CP210X_GET_CHARS 0x0E 183 #define CP210X_GET_PROPS 0x0F 184 #define CP210X_GET_COMM_STATUS 0x10 185 #define CP210X_RESET 0x11 186 #define CP210X_PURGE 0x12 187 #define CP210X_SET_FLOW 0x13 188 #define CP210X_GET_FLOW 0x14 189 #define CP210X_EMBED_EVENTS 0x15 190 #define CP210X_GET_EVENTSTATE 0x16 191 #define CP210X_SET_CHARS 0x19 192 193 /* CP210X_IFC_ENABLE */ 194 #define UART_ENABLE 0x0001 195 #define UART_DISABLE 0x0000 196 197 /* CP210X_(SET|GET)_BAUDDIV */ 198 #define BAUD_RATE_GEN_FREQ 0x384000 199 200 /* CP210X_(SET|GET)_LINE_CTL */ 201 #define BITS_DATA_MASK 0X0f00 202 #define BITS_DATA_5 0X0500 203 #define BITS_DATA_6 0X0600 204 #define BITS_DATA_7 0X0700 205 #define BITS_DATA_8 0X0800 206 #define BITS_DATA_9 0X0900 207 208 #define BITS_PARITY_MASK 0x00f0 209 #define BITS_PARITY_NONE 0x0000 210 #define BITS_PARITY_ODD 0x0010 211 #define BITS_PARITY_EVEN 0x0020 212 #define BITS_PARITY_MARK 0x0030 213 #define BITS_PARITY_SPACE 0x0040 214 215 #define BITS_STOP_MASK 0x000f 216 #define BITS_STOP_1 0x0000 217 #define BITS_STOP_1_5 0x0001 218 #define BITS_STOP_2 0x0002 219 220 /* CP210X_SET_BREAK */ 221 #define BREAK_ON 0x0000 222 #define BREAK_OFF 0x0001 223 224 /* CP210X_(SET_MHS|GET_MDMSTS) */ 225 #define CONTROL_DTR 0x0001 226 #define CONTROL_RTS 0x0002 227 #define CONTROL_CTS 0x0010 228 #define CONTROL_DSR 0x0020 229 #define CONTROL_RING 0x0040 230 #define CONTROL_DCD 0x0080 231 #define CONTROL_WRITE_DTR 0x0100 232 #define CONTROL_WRITE_RTS 0x0200 233 234 /* 235 * cp210x_get_config 236 * Reads from the CP210x configuration registers 237 * 'size' is specified in bytes. 238 * 'data' is a pointer to a pre-allocated array of integers large 239 * enough to hold 'size' bytes (with 4 bytes to each integer) 240 */ 241 static int cp210x_get_config(struct usb_serial_port *port, u8 request, 242 unsigned int *data, int size) 243 { 244 struct usb_serial *serial = port->serial; 245 __le32 *buf; 246 int result, i, length; 247 248 /* Number of integers required to contain the array */ 249 length = (((size - 1) | 3) + 1)/4; 250 251 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL); 252 if (!buf) { 253 dev_err(&port->dev, "%s - out of memory.\n", __func__); 254 return -ENOMEM; 255 } 256 257 /* Issue the request, attempting to read 'size' bytes */ 258 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 259 request, REQTYPE_DEVICE_TO_HOST, 0x0000, 260 0, buf, size, 300); 261 262 /* Convert data into an array of integers */ 263 for (i = 0; i < length; i++) 264 data[i] = le32_to_cpu(buf[i]); 265 266 kfree(buf); 267 268 if (result != size) { 269 dbg("%s - Unable to send config request, " 270 "request=0x%x size=%d result=%d\n", 271 __func__, request, size, result); 272 return -EPROTO; 273 } 274 275 return 0; 276 } 277 278 /* 279 * cp210x_set_config 280 * Writes to the CP210x configuration registers 281 * Values less than 16 bits wide are sent directly 282 * 'size' is specified in bytes. 283 */ 284 static int cp210x_set_config(struct usb_serial_port *port, u8 request, 285 unsigned int *data, int size) 286 { 287 struct usb_serial *serial = port->serial; 288 __le32 *buf; 289 int result, i, length; 290 291 /* Number of integers required to contain the array */ 292 length = (((size - 1) | 3) + 1)/4; 293 294 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL); 295 if (!buf) { 296 dev_err(&port->dev, "%s - out of memory.\n", 297 __func__); 298 return -ENOMEM; 299 } 300 301 /* Array of integers into bytes */ 302 for (i = 0; i < length; i++) 303 buf[i] = cpu_to_le32(data[i]); 304 305 if (size > 2) { 306 result = usb_control_msg(serial->dev, 307 usb_sndctrlpipe(serial->dev, 0), 308 request, REQTYPE_HOST_TO_DEVICE, 0x0000, 309 0, buf, size, 300); 310 } else { 311 result = usb_control_msg(serial->dev, 312 usb_sndctrlpipe(serial->dev, 0), 313 request, REQTYPE_HOST_TO_DEVICE, data[0], 314 0, NULL, 0, 300); 315 } 316 317 kfree(buf); 318 319 if ((size > 2 && result != size) || result < 0) { 320 dbg("%s - Unable to send request, " 321 "request=0x%x size=%d result=%d\n", 322 __func__, request, size, result); 323 return -EPROTO; 324 } 325 326 return 0; 327 } 328 329 /* 330 * cp210x_set_config_single 331 * Convenience function for calling cp210x_set_config on single data values 332 * without requiring an integer pointer 333 */ 334 static inline int cp210x_set_config_single(struct usb_serial_port *port, 335 u8 request, unsigned int data) 336 { 337 return cp210x_set_config(port, request, &data, 2); 338 } 339 340 /* 341 * cp210x_quantise_baudrate 342 * Quantises the baud rate as per AN205 Table 1 343 */ 344 static unsigned int cp210x_quantise_baudrate(unsigned int baud) { 345 if (baud <= 56) baud = 0; 346 else if (baud <= 300) baud = 300; 347 else if (baud <= 600) baud = 600; 348 else if (baud <= 1200) baud = 1200; 349 else if (baud <= 1800) baud = 1800; 350 else if (baud <= 2400) baud = 2400; 351 else if (baud <= 4000) baud = 4000; 352 else if (baud <= 4803) baud = 4800; 353 else if (baud <= 7207) baud = 7200; 354 else if (baud <= 9612) baud = 9600; 355 else if (baud <= 14428) baud = 14400; 356 else if (baud <= 16062) baud = 16000; 357 else if (baud <= 19250) baud = 19200; 358 else if (baud <= 28912) baud = 28800; 359 else if (baud <= 38601) baud = 38400; 360 else if (baud <= 51558) baud = 51200; 361 else if (baud <= 56280) baud = 56000; 362 else if (baud <= 58053) baud = 57600; 363 else if (baud <= 64111) baud = 64000; 364 else if (baud <= 77608) baud = 76800; 365 else if (baud <= 117028) baud = 115200; 366 else if (baud <= 129347) baud = 128000; 367 else if (baud <= 156868) baud = 153600; 368 else if (baud <= 237832) baud = 230400; 369 else if (baud <= 254234) baud = 250000; 370 else if (baud <= 273066) baud = 256000; 371 else if (baud <= 491520) baud = 460800; 372 else if (baud <= 567138) baud = 500000; 373 else if (baud <= 670254) baud = 576000; 374 else if (baud <= 1053257) baud = 921600; 375 else if (baud <= 1474560) baud = 1228800; 376 else if (baud <= 2457600) baud = 1843200; 377 else baud = 3686400; 378 return baud; 379 } 380 381 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port) 382 { 383 int result; 384 385 dbg("%s - port %d", __func__, port->number); 386 387 if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) { 388 dev_err(&port->dev, "%s - Unable to enable UART\n", 389 __func__); 390 return -EPROTO; 391 } 392 393 result = usb_serial_generic_open(tty, port); 394 if (result) 395 return result; 396 397 /* Configure the termios structure */ 398 cp210x_get_termios(tty, port); 399 return 0; 400 } 401 402 static void cp210x_close(struct usb_serial_port *port) 403 { 404 dbg("%s - port %d", __func__, port->number); 405 406 usb_serial_generic_close(port); 407 408 mutex_lock(&port->serial->disc_mutex); 409 if (!port->serial->disconnected) 410 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE); 411 mutex_unlock(&port->serial->disc_mutex); 412 } 413 414 /* 415 * cp210x_get_termios 416 * Reads the baud rate, data bits, parity, stop bits and flow control mode 417 * from the device, corrects any unsupported values, and configures the 418 * termios structure to reflect the state of the device 419 */ 420 static void cp210x_get_termios(struct tty_struct *tty, 421 struct usb_serial_port *port) 422 { 423 unsigned int baud; 424 425 if (tty) { 426 cp210x_get_termios_port(tty->driver_data, 427 &tty->termios->c_cflag, &baud); 428 tty_encode_baud_rate(tty, baud, baud); 429 } 430 431 else { 432 unsigned int cflag; 433 cflag = 0; 434 cp210x_get_termios_port(port, &cflag, &baud); 435 } 436 } 437 438 /* 439 * cp210x_get_termios_port 440 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port. 441 */ 442 static void cp210x_get_termios_port(struct usb_serial_port *port, 443 unsigned int *cflagp, unsigned int *baudp) 444 { 445 unsigned int cflag, modem_ctl[4]; 446 unsigned int baud; 447 unsigned int bits; 448 449 dbg("%s - port %d", __func__, port->number); 450 451 cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2); 452 /* Convert to baudrate */ 453 if (baud) 454 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud); 455 456 dbg("%s - baud rate = %d", __func__, baud); 457 *baudp = baud; 458 459 cflag = *cflagp; 460 461 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 462 cflag &= ~CSIZE; 463 switch (bits & BITS_DATA_MASK) { 464 case BITS_DATA_5: 465 dbg("%s - data bits = 5", __func__); 466 cflag |= CS5; 467 break; 468 case BITS_DATA_6: 469 dbg("%s - data bits = 6", __func__); 470 cflag |= CS6; 471 break; 472 case BITS_DATA_7: 473 dbg("%s - data bits = 7", __func__); 474 cflag |= CS7; 475 break; 476 case BITS_DATA_8: 477 dbg("%s - data bits = 8", __func__); 478 cflag |= CS8; 479 break; 480 case BITS_DATA_9: 481 dbg("%s - data bits = 9 (not supported, using 8 data bits)", 482 __func__); 483 cflag |= CS8; 484 bits &= ~BITS_DATA_MASK; 485 bits |= BITS_DATA_8; 486 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 487 break; 488 default: 489 dbg("%s - Unknown number of data bits, using 8", __func__); 490 cflag |= CS8; 491 bits &= ~BITS_DATA_MASK; 492 bits |= BITS_DATA_8; 493 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 494 break; 495 } 496 497 switch (bits & BITS_PARITY_MASK) { 498 case BITS_PARITY_NONE: 499 dbg("%s - parity = NONE", __func__); 500 cflag &= ~PARENB; 501 break; 502 case BITS_PARITY_ODD: 503 dbg("%s - parity = ODD", __func__); 504 cflag |= (PARENB|PARODD); 505 break; 506 case BITS_PARITY_EVEN: 507 dbg("%s - parity = EVEN", __func__); 508 cflag &= ~PARODD; 509 cflag |= PARENB; 510 break; 511 case BITS_PARITY_MARK: 512 dbg("%s - parity = MARK (not supported, disabling parity)", 513 __func__); 514 cflag &= ~PARENB; 515 bits &= ~BITS_PARITY_MASK; 516 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 517 break; 518 case BITS_PARITY_SPACE: 519 dbg("%s - parity = SPACE (not supported, disabling parity)", 520 __func__); 521 cflag &= ~PARENB; 522 bits &= ~BITS_PARITY_MASK; 523 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 524 break; 525 default: 526 dbg("%s - Unknown parity mode, disabling parity", __func__); 527 cflag &= ~PARENB; 528 bits &= ~BITS_PARITY_MASK; 529 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 530 break; 531 } 532 533 cflag &= ~CSTOPB; 534 switch (bits & BITS_STOP_MASK) { 535 case BITS_STOP_1: 536 dbg("%s - stop bits = 1", __func__); 537 break; 538 case BITS_STOP_1_5: 539 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)", 540 __func__); 541 bits &= ~BITS_STOP_MASK; 542 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 543 break; 544 case BITS_STOP_2: 545 dbg("%s - stop bits = 2", __func__); 546 cflag |= CSTOPB; 547 break; 548 default: 549 dbg("%s - Unknown number of stop bits, using 1 stop bit", 550 __func__); 551 bits &= ~BITS_STOP_MASK; 552 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 553 break; 554 } 555 556 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 557 if (modem_ctl[0] & 0x0008) { 558 dbg("%s - flow control = CRTSCTS", __func__); 559 cflag |= CRTSCTS; 560 } else { 561 dbg("%s - flow control = NONE", __func__); 562 cflag &= ~CRTSCTS; 563 } 564 565 *cflagp = cflag; 566 } 567 568 static void cp210x_set_termios(struct tty_struct *tty, 569 struct usb_serial_port *port, struct ktermios *old_termios) 570 { 571 unsigned int cflag, old_cflag; 572 unsigned int baud = 0, bits; 573 unsigned int modem_ctl[4]; 574 575 dbg("%s - port %d", __func__, port->number); 576 577 if (!tty) 578 return; 579 580 tty->termios->c_cflag &= ~CMSPAR; 581 cflag = tty->termios->c_cflag; 582 old_cflag = old_termios->c_cflag; 583 baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty)); 584 585 /* If the baud rate is to be updated*/ 586 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) { 587 dbg("%s - Setting baud rate to %d baud", __func__, 588 baud); 589 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV, 590 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) { 591 dbg("Baud rate requested not supported by device"); 592 baud = tty_termios_baud_rate(old_termios); 593 } 594 } 595 /* Report back the resulting baud rate */ 596 tty_encode_baud_rate(tty, baud, baud); 597 598 /* If the number of data bits is to be updated */ 599 if ((cflag & CSIZE) != (old_cflag & CSIZE)) { 600 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 601 bits &= ~BITS_DATA_MASK; 602 switch (cflag & CSIZE) { 603 case CS5: 604 bits |= BITS_DATA_5; 605 dbg("%s - data bits = 5", __func__); 606 break; 607 case CS6: 608 bits |= BITS_DATA_6; 609 dbg("%s - data bits = 6", __func__); 610 break; 611 case CS7: 612 bits |= BITS_DATA_7; 613 dbg("%s - data bits = 7", __func__); 614 break; 615 case CS8: 616 bits |= BITS_DATA_8; 617 dbg("%s - data bits = 8", __func__); 618 break; 619 /*case CS9: 620 bits |= BITS_DATA_9; 621 dbg("%s - data bits = 9", __func__); 622 break;*/ 623 default: 624 dbg("cp210x driver does not " 625 "support the number of bits requested," 626 " using 8 bit mode\n"); 627 bits |= BITS_DATA_8; 628 break; 629 } 630 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 631 dbg("Number of data bits requested " 632 "not supported by device\n"); 633 } 634 635 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) { 636 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 637 bits &= ~BITS_PARITY_MASK; 638 if (cflag & PARENB) { 639 if (cflag & PARODD) { 640 bits |= BITS_PARITY_ODD; 641 dbg("%s - parity = ODD", __func__); 642 } else { 643 bits |= BITS_PARITY_EVEN; 644 dbg("%s - parity = EVEN", __func__); 645 } 646 } 647 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 648 dbg("Parity mode not supported " 649 "by device\n"); 650 } 651 652 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { 653 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 654 bits &= ~BITS_STOP_MASK; 655 if (cflag & CSTOPB) { 656 bits |= BITS_STOP_2; 657 dbg("%s - stop bits = 2", __func__); 658 } else { 659 bits |= BITS_STOP_1; 660 dbg("%s - stop bits = 1", __func__); 661 } 662 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 663 dbg("Number of stop bits requested " 664 "not supported by device\n"); 665 } 666 667 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { 668 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 669 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", 670 __func__, modem_ctl[0], modem_ctl[1], 671 modem_ctl[2], modem_ctl[3]); 672 673 if (cflag & CRTSCTS) { 674 modem_ctl[0] &= ~0x7B; 675 modem_ctl[0] |= 0x09; 676 modem_ctl[1] = 0x80; 677 dbg("%s - flow control = CRTSCTS", __func__); 678 } else { 679 modem_ctl[0] &= ~0x7B; 680 modem_ctl[0] |= 0x01; 681 modem_ctl[1] |= 0x40; 682 dbg("%s - flow control = NONE", __func__); 683 } 684 685 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", 686 __func__, modem_ctl[0], modem_ctl[1], 687 modem_ctl[2], modem_ctl[3]); 688 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16); 689 } 690 691 } 692 693 static int cp210x_tiocmset (struct tty_struct *tty, struct file *file, 694 unsigned int set, unsigned int clear) 695 { 696 struct usb_serial_port *port = tty->driver_data; 697 return cp210x_tiocmset_port(port, file, set, clear); 698 } 699 700 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *file, 701 unsigned int set, unsigned int clear) 702 { 703 unsigned int control = 0; 704 705 dbg("%s - port %d", __func__, port->number); 706 707 if (set & TIOCM_RTS) { 708 control |= CONTROL_RTS; 709 control |= CONTROL_WRITE_RTS; 710 } 711 if (set & TIOCM_DTR) { 712 control |= CONTROL_DTR; 713 control |= CONTROL_WRITE_DTR; 714 } 715 if (clear & TIOCM_RTS) { 716 control &= ~CONTROL_RTS; 717 control |= CONTROL_WRITE_RTS; 718 } 719 if (clear & TIOCM_DTR) { 720 control &= ~CONTROL_DTR; 721 control |= CONTROL_WRITE_DTR; 722 } 723 724 dbg("%s - control = 0x%.4x", __func__, control); 725 726 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2); 727 } 728 729 static void cp210x_dtr_rts(struct usb_serial_port *p, int on) 730 { 731 if (on) 732 cp210x_tiocmset_port(p, NULL, TIOCM_DTR|TIOCM_RTS, 0); 733 else 734 cp210x_tiocmset_port(p, NULL, 0, TIOCM_DTR|TIOCM_RTS); 735 } 736 737 static int cp210x_tiocmget (struct tty_struct *tty, struct file *file) 738 { 739 struct usb_serial_port *port = tty->driver_data; 740 unsigned int control; 741 int result; 742 743 dbg("%s - port %d", __func__, port->number); 744 745 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1); 746 747 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) 748 |((control & CONTROL_RTS) ? TIOCM_RTS : 0) 749 |((control & CONTROL_CTS) ? TIOCM_CTS : 0) 750 |((control & CONTROL_DSR) ? TIOCM_DSR : 0) 751 |((control & CONTROL_RING)? TIOCM_RI : 0) 752 |((control & CONTROL_DCD) ? TIOCM_CD : 0); 753 754 dbg("%s - control = 0x%.2x", __func__, control); 755 756 return result; 757 } 758 759 static int cp210x_carrier_raised(struct usb_serial_port *p) 760 { 761 unsigned int control; 762 cp210x_get_config(p, CP210X_GET_MDMSTS, &control, 1); 763 if (control & CONTROL_DCD) 764 return 1; 765 return 0; 766 } 767 768 static void cp210x_break_ctl (struct tty_struct *tty, int break_state) 769 { 770 struct usb_serial_port *port = tty->driver_data; 771 unsigned int state; 772 773 dbg("%s - port %d", __func__, port->number); 774 if (break_state == 0) 775 state = BREAK_OFF; 776 else 777 state = BREAK_ON; 778 dbg("%s - turning break %s", __func__, 779 state == BREAK_OFF ? "off" : "on"); 780 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2); 781 } 782 783 static int cp210x_startup(struct usb_serial *serial) 784 { 785 /* cp210x buffers behave strangely unless device is reset */ 786 usb_reset_device(serial->dev); 787 return 0; 788 } 789 790 static int __init cp210x_init(void) 791 { 792 int retval; 793 794 retval = usb_serial_register(&cp210x_device); 795 if (retval) 796 return retval; /* Failed to register */ 797 798 retval = usb_register(&cp210x_driver); 799 if (retval) { 800 /* Failed to register */ 801 usb_serial_deregister(&cp210x_device); 802 return retval; 803 } 804 805 /* Success */ 806 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 807 DRIVER_DESC "\n"); 808 return 0; 809 } 810 811 static void __exit cp210x_exit(void) 812 { 813 usb_deregister(&cp210x_driver); 814 usb_serial_deregister(&cp210x_device); 815 } 816 817 module_init(cp210x_init); 818 module_exit(cp210x_exit); 819 820 MODULE_DESCRIPTION(DRIVER_DESC); 821 MODULE_VERSION(DRIVER_VERSION); 822 MODULE_LICENSE("GPL"); 823 824 module_param(debug, bool, S_IRUGO | S_IWUSR); 825 MODULE_PARM_DESC(debug, "Enable verbose debugging messages"); 826