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, 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, 0x8411) }, /* Kyocera GPS Module */ 112 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */ 113 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */ 114 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ 115 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ 116 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */ 117 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */ 118 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */ 119 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */ 120 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */ 121 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ 122 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */ 123 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ 124 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */ 125 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ 126 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ 127 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */ 128 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */ 129 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */ 130 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */ 131 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */ 132 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */ 133 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */ 134 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */ 135 { } /* Terminating Entry */ 136 }; 137 138 MODULE_DEVICE_TABLE(usb, id_table); 139 140 static struct usb_driver cp210x_driver = { 141 .name = "cp210x", 142 .probe = usb_serial_probe, 143 .disconnect = usb_serial_disconnect, 144 .id_table = id_table, 145 .no_dynamic_id = 1, 146 }; 147 148 static struct usb_serial_driver cp210x_device = { 149 .driver = { 150 .owner = THIS_MODULE, 151 .name = "cp210x", 152 }, 153 .usb_driver = &cp210x_driver, 154 .id_table = id_table, 155 .num_ports = 1, 156 .bulk_in_size = 256, 157 .bulk_out_size = 256, 158 .open = cp210x_open, 159 .close = cp210x_close, 160 .break_ctl = cp210x_break_ctl, 161 .set_termios = cp210x_set_termios, 162 .tiocmget = cp210x_tiocmget, 163 .tiocmset = cp210x_tiocmset, 164 .attach = cp210x_startup, 165 .dtr_rts = cp210x_dtr_rts, 166 .carrier_raised = cp210x_carrier_raised 167 }; 168 169 /* Config request types */ 170 #define REQTYPE_HOST_TO_DEVICE 0x41 171 #define REQTYPE_DEVICE_TO_HOST 0xc1 172 173 /* Config request codes */ 174 #define CP210X_IFC_ENABLE 0x00 175 #define CP210X_SET_BAUDDIV 0x01 176 #define CP210X_GET_BAUDDIV 0x02 177 #define CP210X_SET_LINE_CTL 0x03 178 #define CP210X_GET_LINE_CTL 0x04 179 #define CP210X_SET_BREAK 0x05 180 #define CP210X_IMM_CHAR 0x06 181 #define CP210X_SET_MHS 0x07 182 #define CP210X_GET_MDMSTS 0x08 183 #define CP210X_SET_XON 0x09 184 #define CP210X_SET_XOFF 0x0A 185 #define CP210X_SET_EVENTMASK 0x0B 186 #define CP210X_GET_EVENTMASK 0x0C 187 #define CP210X_SET_CHAR 0x0D 188 #define CP210X_GET_CHARS 0x0E 189 #define CP210X_GET_PROPS 0x0F 190 #define CP210X_GET_COMM_STATUS 0x10 191 #define CP210X_RESET 0x11 192 #define CP210X_PURGE 0x12 193 #define CP210X_SET_FLOW 0x13 194 #define CP210X_GET_FLOW 0x14 195 #define CP210X_EMBED_EVENTS 0x15 196 #define CP210X_GET_EVENTSTATE 0x16 197 #define CP210X_SET_CHARS 0x19 198 199 /* CP210X_IFC_ENABLE */ 200 #define UART_ENABLE 0x0001 201 #define UART_DISABLE 0x0000 202 203 /* CP210X_(SET|GET)_BAUDDIV */ 204 #define BAUD_RATE_GEN_FREQ 0x384000 205 206 /* CP210X_(SET|GET)_LINE_CTL */ 207 #define BITS_DATA_MASK 0X0f00 208 #define BITS_DATA_5 0X0500 209 #define BITS_DATA_6 0X0600 210 #define BITS_DATA_7 0X0700 211 #define BITS_DATA_8 0X0800 212 #define BITS_DATA_9 0X0900 213 214 #define BITS_PARITY_MASK 0x00f0 215 #define BITS_PARITY_NONE 0x0000 216 #define BITS_PARITY_ODD 0x0010 217 #define BITS_PARITY_EVEN 0x0020 218 #define BITS_PARITY_MARK 0x0030 219 #define BITS_PARITY_SPACE 0x0040 220 221 #define BITS_STOP_MASK 0x000f 222 #define BITS_STOP_1 0x0000 223 #define BITS_STOP_1_5 0x0001 224 #define BITS_STOP_2 0x0002 225 226 /* CP210X_SET_BREAK */ 227 #define BREAK_ON 0x0001 228 #define BREAK_OFF 0x0000 229 230 /* CP210X_(SET_MHS|GET_MDMSTS) */ 231 #define CONTROL_DTR 0x0001 232 #define CONTROL_RTS 0x0002 233 #define CONTROL_CTS 0x0010 234 #define CONTROL_DSR 0x0020 235 #define CONTROL_RING 0x0040 236 #define CONTROL_DCD 0x0080 237 #define CONTROL_WRITE_DTR 0x0100 238 #define CONTROL_WRITE_RTS 0x0200 239 240 /* 241 * cp210x_get_config 242 * Reads from the CP210x configuration registers 243 * 'size' is specified in bytes. 244 * 'data' is a pointer to a pre-allocated array of integers large 245 * enough to hold 'size' bytes (with 4 bytes to each integer) 246 */ 247 static int cp210x_get_config(struct usb_serial_port *port, u8 request, 248 unsigned int *data, int size) 249 { 250 struct usb_serial *serial = port->serial; 251 __le32 *buf; 252 int result, i, length; 253 254 /* Number of integers required to contain the array */ 255 length = (((size - 1) | 3) + 1)/4; 256 257 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL); 258 if (!buf) { 259 dev_err(&port->dev, "%s - out of memory.\n", __func__); 260 return -ENOMEM; 261 } 262 263 /* Issue the request, attempting to read 'size' bytes */ 264 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 265 request, REQTYPE_DEVICE_TO_HOST, 0x0000, 266 0, buf, size, 300); 267 268 /* Convert data into an array of integers */ 269 for (i = 0; i < length; i++) 270 data[i] = le32_to_cpu(buf[i]); 271 272 kfree(buf); 273 274 if (result != size) { 275 dbg("%s - Unable to send config request, " 276 "request=0x%x size=%d result=%d\n", 277 __func__, request, size, result); 278 return -EPROTO; 279 } 280 281 return 0; 282 } 283 284 /* 285 * cp210x_set_config 286 * Writes to the CP210x configuration registers 287 * Values less than 16 bits wide are sent directly 288 * 'size' is specified in bytes. 289 */ 290 static int cp210x_set_config(struct usb_serial_port *port, u8 request, 291 unsigned int *data, int size) 292 { 293 struct usb_serial *serial = port->serial; 294 __le32 *buf; 295 int result, i, length; 296 297 /* Number of integers required to contain the array */ 298 length = (((size - 1) | 3) + 1)/4; 299 300 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL); 301 if (!buf) { 302 dev_err(&port->dev, "%s - out of memory.\n", 303 __func__); 304 return -ENOMEM; 305 } 306 307 /* Array of integers into bytes */ 308 for (i = 0; i < length; i++) 309 buf[i] = cpu_to_le32(data[i]); 310 311 if (size > 2) { 312 result = usb_control_msg(serial->dev, 313 usb_sndctrlpipe(serial->dev, 0), 314 request, REQTYPE_HOST_TO_DEVICE, 0x0000, 315 0, buf, size, 300); 316 } else { 317 result = usb_control_msg(serial->dev, 318 usb_sndctrlpipe(serial->dev, 0), 319 request, REQTYPE_HOST_TO_DEVICE, data[0], 320 0, NULL, 0, 300); 321 } 322 323 kfree(buf); 324 325 if ((size > 2 && result != size) || result < 0) { 326 dbg("%s - Unable to send request, " 327 "request=0x%x size=%d result=%d\n", 328 __func__, request, size, result); 329 return -EPROTO; 330 } 331 332 return 0; 333 } 334 335 /* 336 * cp210x_set_config_single 337 * Convenience function for calling cp210x_set_config on single data values 338 * without requiring an integer pointer 339 */ 340 static inline int cp210x_set_config_single(struct usb_serial_port *port, 341 u8 request, unsigned int data) 342 { 343 return cp210x_set_config(port, request, &data, 2); 344 } 345 346 /* 347 * cp210x_quantise_baudrate 348 * Quantises the baud rate as per AN205 Table 1 349 */ 350 static unsigned int cp210x_quantise_baudrate(unsigned int baud) { 351 if (baud <= 56) baud = 0; 352 else if (baud <= 300) baud = 300; 353 else if (baud <= 600) baud = 600; 354 else if (baud <= 1200) baud = 1200; 355 else if (baud <= 1800) baud = 1800; 356 else if (baud <= 2400) baud = 2400; 357 else if (baud <= 4000) baud = 4000; 358 else if (baud <= 4803) baud = 4800; 359 else if (baud <= 7207) baud = 7200; 360 else if (baud <= 9612) baud = 9600; 361 else if (baud <= 14428) baud = 14400; 362 else if (baud <= 16062) baud = 16000; 363 else if (baud <= 19250) baud = 19200; 364 else if (baud <= 28912) baud = 28800; 365 else if (baud <= 38601) baud = 38400; 366 else if (baud <= 51558) baud = 51200; 367 else if (baud <= 56280) baud = 56000; 368 else if (baud <= 58053) baud = 57600; 369 else if (baud <= 64111) baud = 64000; 370 else if (baud <= 77608) baud = 76800; 371 else if (baud <= 117028) baud = 115200; 372 else if (baud <= 129347) baud = 128000; 373 else if (baud <= 156868) baud = 153600; 374 else if (baud <= 237832) baud = 230400; 375 else if (baud <= 254234) baud = 250000; 376 else if (baud <= 273066) baud = 256000; 377 else if (baud <= 491520) baud = 460800; 378 else if (baud <= 567138) baud = 500000; 379 else if (baud <= 670254) baud = 576000; 380 else if (baud <= 1053257) baud = 921600; 381 else if (baud <= 1474560) baud = 1228800; 382 else if (baud <= 2457600) baud = 1843200; 383 else baud = 3686400; 384 return baud; 385 } 386 387 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port) 388 { 389 int result; 390 391 dbg("%s - port %d", __func__, port->number); 392 393 if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) { 394 dev_err(&port->dev, "%s - Unable to enable UART\n", 395 __func__); 396 return -EPROTO; 397 } 398 399 result = usb_serial_generic_open(tty, port); 400 if (result) 401 return result; 402 403 /* Configure the termios structure */ 404 cp210x_get_termios(tty, port); 405 return 0; 406 } 407 408 static void cp210x_close(struct usb_serial_port *port) 409 { 410 dbg("%s - port %d", __func__, port->number); 411 412 usb_serial_generic_close(port); 413 414 mutex_lock(&port->serial->disc_mutex); 415 if (!port->serial->disconnected) 416 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE); 417 mutex_unlock(&port->serial->disc_mutex); 418 } 419 420 /* 421 * cp210x_get_termios 422 * Reads the baud rate, data bits, parity, stop bits and flow control mode 423 * from the device, corrects any unsupported values, and configures the 424 * termios structure to reflect the state of the device 425 */ 426 static void cp210x_get_termios(struct tty_struct *tty, 427 struct usb_serial_port *port) 428 { 429 unsigned int baud; 430 431 if (tty) { 432 cp210x_get_termios_port(tty->driver_data, 433 &tty->termios->c_cflag, &baud); 434 tty_encode_baud_rate(tty, baud, baud); 435 } 436 437 else { 438 unsigned int cflag; 439 cflag = 0; 440 cp210x_get_termios_port(port, &cflag, &baud); 441 } 442 } 443 444 /* 445 * cp210x_get_termios_port 446 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port. 447 */ 448 static void cp210x_get_termios_port(struct usb_serial_port *port, 449 unsigned int *cflagp, unsigned int *baudp) 450 { 451 unsigned int cflag, modem_ctl[4]; 452 unsigned int baud; 453 unsigned int bits; 454 455 dbg("%s - port %d", __func__, port->number); 456 457 cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2); 458 /* Convert to baudrate */ 459 if (baud) 460 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud); 461 462 dbg("%s - baud rate = %d", __func__, baud); 463 *baudp = baud; 464 465 cflag = *cflagp; 466 467 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 468 cflag &= ~CSIZE; 469 switch (bits & BITS_DATA_MASK) { 470 case BITS_DATA_5: 471 dbg("%s - data bits = 5", __func__); 472 cflag |= CS5; 473 break; 474 case BITS_DATA_6: 475 dbg("%s - data bits = 6", __func__); 476 cflag |= CS6; 477 break; 478 case BITS_DATA_7: 479 dbg("%s - data bits = 7", __func__); 480 cflag |= CS7; 481 break; 482 case BITS_DATA_8: 483 dbg("%s - data bits = 8", __func__); 484 cflag |= CS8; 485 break; 486 case BITS_DATA_9: 487 dbg("%s - data bits = 9 (not supported, using 8 data bits)", 488 __func__); 489 cflag |= CS8; 490 bits &= ~BITS_DATA_MASK; 491 bits |= BITS_DATA_8; 492 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 493 break; 494 default: 495 dbg("%s - Unknown number of data bits, using 8", __func__); 496 cflag |= CS8; 497 bits &= ~BITS_DATA_MASK; 498 bits |= BITS_DATA_8; 499 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 500 break; 501 } 502 503 switch (bits & BITS_PARITY_MASK) { 504 case BITS_PARITY_NONE: 505 dbg("%s - parity = NONE", __func__); 506 cflag &= ~PARENB; 507 break; 508 case BITS_PARITY_ODD: 509 dbg("%s - parity = ODD", __func__); 510 cflag |= (PARENB|PARODD); 511 break; 512 case BITS_PARITY_EVEN: 513 dbg("%s - parity = EVEN", __func__); 514 cflag &= ~PARODD; 515 cflag |= PARENB; 516 break; 517 case BITS_PARITY_MARK: 518 dbg("%s - parity = MARK (not supported, disabling parity)", 519 __func__); 520 cflag &= ~PARENB; 521 bits &= ~BITS_PARITY_MASK; 522 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 523 break; 524 case BITS_PARITY_SPACE: 525 dbg("%s - parity = SPACE (not supported, disabling parity)", 526 __func__); 527 cflag &= ~PARENB; 528 bits &= ~BITS_PARITY_MASK; 529 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 530 break; 531 default: 532 dbg("%s - Unknown parity mode, disabling parity", __func__); 533 cflag &= ~PARENB; 534 bits &= ~BITS_PARITY_MASK; 535 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 536 break; 537 } 538 539 cflag &= ~CSTOPB; 540 switch (bits & BITS_STOP_MASK) { 541 case BITS_STOP_1: 542 dbg("%s - stop bits = 1", __func__); 543 break; 544 case BITS_STOP_1_5: 545 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)", 546 __func__); 547 bits &= ~BITS_STOP_MASK; 548 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 549 break; 550 case BITS_STOP_2: 551 dbg("%s - stop bits = 2", __func__); 552 cflag |= CSTOPB; 553 break; 554 default: 555 dbg("%s - Unknown number of stop bits, using 1 stop bit", 556 __func__); 557 bits &= ~BITS_STOP_MASK; 558 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 559 break; 560 } 561 562 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 563 if (modem_ctl[0] & 0x0008) { 564 dbg("%s - flow control = CRTSCTS", __func__); 565 cflag |= CRTSCTS; 566 } else { 567 dbg("%s - flow control = NONE", __func__); 568 cflag &= ~CRTSCTS; 569 } 570 571 *cflagp = cflag; 572 } 573 574 static void cp210x_set_termios(struct tty_struct *tty, 575 struct usb_serial_port *port, struct ktermios *old_termios) 576 { 577 unsigned int cflag, old_cflag; 578 unsigned int baud = 0, bits; 579 unsigned int modem_ctl[4]; 580 581 dbg("%s - port %d", __func__, port->number); 582 583 if (!tty) 584 return; 585 586 tty->termios->c_cflag &= ~CMSPAR; 587 cflag = tty->termios->c_cflag; 588 old_cflag = old_termios->c_cflag; 589 baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty)); 590 591 /* If the baud rate is to be updated*/ 592 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) { 593 dbg("%s - Setting baud rate to %d baud", __func__, 594 baud); 595 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV, 596 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) { 597 dbg("Baud rate requested not supported by device"); 598 baud = tty_termios_baud_rate(old_termios); 599 } 600 } 601 /* Report back the resulting baud rate */ 602 tty_encode_baud_rate(tty, baud, baud); 603 604 /* If the number of data bits is to be updated */ 605 if ((cflag & CSIZE) != (old_cflag & CSIZE)) { 606 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 607 bits &= ~BITS_DATA_MASK; 608 switch (cflag & CSIZE) { 609 case CS5: 610 bits |= BITS_DATA_5; 611 dbg("%s - data bits = 5", __func__); 612 break; 613 case CS6: 614 bits |= BITS_DATA_6; 615 dbg("%s - data bits = 6", __func__); 616 break; 617 case CS7: 618 bits |= BITS_DATA_7; 619 dbg("%s - data bits = 7", __func__); 620 break; 621 case CS8: 622 bits |= BITS_DATA_8; 623 dbg("%s - data bits = 8", __func__); 624 break; 625 /*case CS9: 626 bits |= BITS_DATA_9; 627 dbg("%s - data bits = 9", __func__); 628 break;*/ 629 default: 630 dbg("cp210x driver does not " 631 "support the number of bits requested," 632 " using 8 bit mode\n"); 633 bits |= BITS_DATA_8; 634 break; 635 } 636 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 637 dbg("Number of data bits requested " 638 "not supported by device\n"); 639 } 640 641 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) { 642 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 643 bits &= ~BITS_PARITY_MASK; 644 if (cflag & PARENB) { 645 if (cflag & PARODD) { 646 bits |= BITS_PARITY_ODD; 647 dbg("%s - parity = ODD", __func__); 648 } else { 649 bits |= BITS_PARITY_EVEN; 650 dbg("%s - parity = EVEN", __func__); 651 } 652 } 653 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 654 dbg("Parity mode not supported " 655 "by device\n"); 656 } 657 658 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { 659 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 660 bits &= ~BITS_STOP_MASK; 661 if (cflag & CSTOPB) { 662 bits |= BITS_STOP_2; 663 dbg("%s - stop bits = 2", __func__); 664 } else { 665 bits |= BITS_STOP_1; 666 dbg("%s - stop bits = 1", __func__); 667 } 668 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 669 dbg("Number of stop bits requested " 670 "not supported by device\n"); 671 } 672 673 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { 674 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 675 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", 676 __func__, modem_ctl[0], modem_ctl[1], 677 modem_ctl[2], modem_ctl[3]); 678 679 if (cflag & CRTSCTS) { 680 modem_ctl[0] &= ~0x7B; 681 modem_ctl[0] |= 0x09; 682 modem_ctl[1] = 0x80; 683 dbg("%s - flow control = CRTSCTS", __func__); 684 } else { 685 modem_ctl[0] &= ~0x7B; 686 modem_ctl[0] |= 0x01; 687 modem_ctl[1] |= 0x40; 688 dbg("%s - flow control = NONE", __func__); 689 } 690 691 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", 692 __func__, modem_ctl[0], modem_ctl[1], 693 modem_ctl[2], modem_ctl[3]); 694 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16); 695 } 696 697 } 698 699 static int cp210x_tiocmset (struct tty_struct *tty, struct file *file, 700 unsigned int set, unsigned int clear) 701 { 702 struct usb_serial_port *port = tty->driver_data; 703 return cp210x_tiocmset_port(port, file, set, clear); 704 } 705 706 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *file, 707 unsigned int set, unsigned int clear) 708 { 709 unsigned int control = 0; 710 711 dbg("%s - port %d", __func__, port->number); 712 713 if (set & TIOCM_RTS) { 714 control |= CONTROL_RTS; 715 control |= CONTROL_WRITE_RTS; 716 } 717 if (set & TIOCM_DTR) { 718 control |= CONTROL_DTR; 719 control |= CONTROL_WRITE_DTR; 720 } 721 if (clear & TIOCM_RTS) { 722 control &= ~CONTROL_RTS; 723 control |= CONTROL_WRITE_RTS; 724 } 725 if (clear & TIOCM_DTR) { 726 control &= ~CONTROL_DTR; 727 control |= CONTROL_WRITE_DTR; 728 } 729 730 dbg("%s - control = 0x%.4x", __func__, control); 731 732 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2); 733 } 734 735 static void cp210x_dtr_rts(struct usb_serial_port *p, int on) 736 { 737 if (on) 738 cp210x_tiocmset_port(p, NULL, TIOCM_DTR|TIOCM_RTS, 0); 739 else 740 cp210x_tiocmset_port(p, NULL, 0, TIOCM_DTR|TIOCM_RTS); 741 } 742 743 static int cp210x_tiocmget (struct tty_struct *tty, struct file *file) 744 { 745 struct usb_serial_port *port = tty->driver_data; 746 unsigned int control; 747 int result; 748 749 dbg("%s - port %d", __func__, port->number); 750 751 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1); 752 753 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) 754 |((control & CONTROL_RTS) ? TIOCM_RTS : 0) 755 |((control & CONTROL_CTS) ? TIOCM_CTS : 0) 756 |((control & CONTROL_DSR) ? TIOCM_DSR : 0) 757 |((control & CONTROL_RING)? TIOCM_RI : 0) 758 |((control & CONTROL_DCD) ? TIOCM_CD : 0); 759 760 dbg("%s - control = 0x%.2x", __func__, control); 761 762 return result; 763 } 764 765 static int cp210x_carrier_raised(struct usb_serial_port *p) 766 { 767 unsigned int control; 768 cp210x_get_config(p, CP210X_GET_MDMSTS, &control, 1); 769 if (control & CONTROL_DCD) 770 return 1; 771 return 0; 772 } 773 774 static void cp210x_break_ctl (struct tty_struct *tty, int break_state) 775 { 776 struct usb_serial_port *port = tty->driver_data; 777 unsigned int state; 778 779 dbg("%s - port %d", __func__, port->number); 780 if (break_state == 0) 781 state = BREAK_OFF; 782 else 783 state = BREAK_ON; 784 dbg("%s - turning break %s", __func__, 785 state == BREAK_OFF ? "off" : "on"); 786 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2); 787 } 788 789 static int cp210x_startup(struct usb_serial *serial) 790 { 791 /* cp210x buffers behave strangely unless device is reset */ 792 usb_reset_device(serial->dev); 793 return 0; 794 } 795 796 static int __init cp210x_init(void) 797 { 798 int retval; 799 800 retval = usb_serial_register(&cp210x_device); 801 if (retval) 802 return retval; /* Failed to register */ 803 804 retval = usb_register(&cp210x_driver); 805 if (retval) { 806 /* Failed to register */ 807 usb_serial_deregister(&cp210x_device); 808 return retval; 809 } 810 811 /* Success */ 812 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 813 DRIVER_DESC "\n"); 814 return 0; 815 } 816 817 static void __exit cp210x_exit(void) 818 { 819 usb_deregister(&cp210x_driver); 820 usb_serial_deregister(&cp210x_device); 821 } 822 823 module_init(cp210x_init); 824 module_exit(cp210x_exit); 825 826 MODULE_DESCRIPTION(DRIVER_DESC); 827 MODULE_VERSION(DRIVER_VERSION); 828 MODULE_LICENSE("GPL"); 829 830 module_param(debug, bool, S_IRUGO | S_IWUSR); 831 MODULE_PARM_DESC(debug, "Enable verbose debugging messages"); 832