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