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