1 /* 2 * Silicon Laboratories CP210x USB to RS232 serial adaptor driver 3 * 4 * Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk) 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License version 8 * 2 as published by the Free Software Foundation. 9 * 10 * Support to set flow control line levels using TIOCMGET and TIOCMSET 11 * thanks to Karl Hiramoto karl@hiramoto.org. RTSCTS hardware flow 12 * control thanks to Munir Nassar nassarmu@real-time.com 13 * 14 */ 15 16 #include <linux/kernel.h> 17 #include <linux/errno.h> 18 #include <linux/slab.h> 19 #include <linux/tty.h> 20 #include <linux/tty_flip.h> 21 #include <linux/module.h> 22 #include <linux/moduleparam.h> 23 #include <linux/usb.h> 24 #include <linux/uaccess.h> 25 #include <linux/usb/serial.h> 26 27 /* 28 * Version Information 29 */ 30 #define DRIVER_VERSION "v0.09" 31 #define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver" 32 33 /* 34 * Function Prototypes 35 */ 36 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *); 37 static void cp210x_close(struct usb_serial_port *); 38 static void cp210x_get_termios(struct tty_struct *, 39 struct usb_serial_port *port); 40 static void cp210x_get_termios_port(struct usb_serial_port *port, 41 unsigned int *cflagp, unsigned int *baudp); 42 static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *, 43 struct ktermios*); 44 static int cp210x_tiocmget(struct tty_struct *); 45 static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int); 46 static int cp210x_tiocmset_port(struct usb_serial_port *port, 47 unsigned int, unsigned int); 48 static void cp210x_break_ctl(struct tty_struct *, int); 49 static int cp210x_startup(struct usb_serial *); 50 static void cp210x_dtr_rts(struct usb_serial_port *p, int on); 51 52 static int debug; 53 54 static const struct usb_device_id id_table[] = { 55 { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */ 56 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */ 57 { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */ 58 { USB_DEVICE(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */ 59 { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */ 60 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */ 61 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */ 62 { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */ 63 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */ 64 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */ 65 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */ 66 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */ 67 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */ 68 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */ 69 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */ 70 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */ 71 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */ 72 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */ 73 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */ 74 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */ 75 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */ 76 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */ 77 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */ 78 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */ 79 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */ 80 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */ 81 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */ 82 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */ 83 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */ 84 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */ 85 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */ 86 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */ 87 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */ 88 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */ 89 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */ 90 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */ 91 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */ 92 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */ 93 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */ 94 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */ 95 { USB_DEVICE(0x10C4, 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 demonstration module */ 105 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis 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, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */ 111 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */ 112 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */ 113 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */ 114 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */ 115 { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */ 116 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */ 117 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */ 118 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */ 119 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ 120 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ 121 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */ 122 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */ 123 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */ 124 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */ 125 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */ 126 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ 127 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */ 128 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ 129 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */ 130 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ 131 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ 132 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */ 133 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */ 134 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */ 135 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */ 136 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */ 137 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */ 138 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */ 139 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */ 140 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */ 141 { } /* Terminating Entry */ 142 }; 143 144 MODULE_DEVICE_TABLE(usb, id_table); 145 146 static struct usb_driver cp210x_driver = { 147 .name = "cp210x", 148 .probe = usb_serial_probe, 149 .disconnect = usb_serial_disconnect, 150 .id_table = id_table, 151 .no_dynamic_id = 1, 152 }; 153 154 static struct usb_serial_driver cp210x_device = { 155 .driver = { 156 .owner = THIS_MODULE, 157 .name = "cp210x", 158 }, 159 .usb_driver = &cp210x_driver, 160 .id_table = id_table, 161 .num_ports = 1, 162 .bulk_in_size = 256, 163 .bulk_out_size = 256, 164 .open = cp210x_open, 165 .close = cp210x_close, 166 .break_ctl = cp210x_break_ctl, 167 .set_termios = cp210x_set_termios, 168 .tiocmget = cp210x_tiocmget, 169 .tiocmset = cp210x_tiocmset, 170 .attach = cp210x_startup, 171 .dtr_rts = cp210x_dtr_rts 172 }; 173 174 /* Config request types */ 175 #define REQTYPE_HOST_TO_DEVICE 0x41 176 #define REQTYPE_DEVICE_TO_HOST 0xc1 177 178 /* Config request codes */ 179 #define CP210X_IFC_ENABLE 0x00 180 #define CP210X_SET_BAUDDIV 0x01 181 #define CP210X_GET_BAUDDIV 0x02 182 #define CP210X_SET_LINE_CTL 0x03 183 #define CP210X_GET_LINE_CTL 0x04 184 #define CP210X_SET_BREAK 0x05 185 #define CP210X_IMM_CHAR 0x06 186 #define CP210X_SET_MHS 0x07 187 #define CP210X_GET_MDMSTS 0x08 188 #define CP210X_SET_XON 0x09 189 #define CP210X_SET_XOFF 0x0A 190 #define CP210X_SET_EVENTMASK 0x0B 191 #define CP210X_GET_EVENTMASK 0x0C 192 #define CP210X_SET_CHAR 0x0D 193 #define CP210X_GET_CHARS 0x0E 194 #define CP210X_GET_PROPS 0x0F 195 #define CP210X_GET_COMM_STATUS 0x10 196 #define CP210X_RESET 0x11 197 #define CP210X_PURGE 0x12 198 #define CP210X_SET_FLOW 0x13 199 #define CP210X_GET_FLOW 0x14 200 #define CP210X_EMBED_EVENTS 0x15 201 #define CP210X_GET_EVENTSTATE 0x16 202 #define CP210X_SET_CHARS 0x19 203 204 /* CP210X_IFC_ENABLE */ 205 #define UART_ENABLE 0x0001 206 #define UART_DISABLE 0x0000 207 208 /* CP210X_(SET|GET)_BAUDDIV */ 209 #define BAUD_RATE_GEN_FREQ 0x384000 210 211 /* CP210X_(SET|GET)_LINE_CTL */ 212 #define BITS_DATA_MASK 0X0f00 213 #define BITS_DATA_5 0X0500 214 #define BITS_DATA_6 0X0600 215 #define BITS_DATA_7 0X0700 216 #define BITS_DATA_8 0X0800 217 #define BITS_DATA_9 0X0900 218 219 #define BITS_PARITY_MASK 0x00f0 220 #define BITS_PARITY_NONE 0x0000 221 #define BITS_PARITY_ODD 0x0010 222 #define BITS_PARITY_EVEN 0x0020 223 #define BITS_PARITY_MARK 0x0030 224 #define BITS_PARITY_SPACE 0x0040 225 226 #define BITS_STOP_MASK 0x000f 227 #define BITS_STOP_1 0x0000 228 #define BITS_STOP_1_5 0x0001 229 #define BITS_STOP_2 0x0002 230 231 /* CP210X_SET_BREAK */ 232 #define BREAK_ON 0x0001 233 #define BREAK_OFF 0x0000 234 235 /* CP210X_(SET_MHS|GET_MDMSTS) */ 236 #define CONTROL_DTR 0x0001 237 #define CONTROL_RTS 0x0002 238 #define CONTROL_CTS 0x0010 239 #define CONTROL_DSR 0x0020 240 #define CONTROL_RING 0x0040 241 #define CONTROL_DCD 0x0080 242 #define CONTROL_WRITE_DTR 0x0100 243 #define CONTROL_WRITE_RTS 0x0200 244 245 /* 246 * cp210x_get_config 247 * Reads from the CP210x configuration registers 248 * 'size' is specified in bytes. 249 * 'data' is a pointer to a pre-allocated array of integers large 250 * enough to hold 'size' bytes (with 4 bytes to each integer) 251 */ 252 static int cp210x_get_config(struct usb_serial_port *port, u8 request, 253 unsigned int *data, int size) 254 { 255 struct usb_serial *serial = port->serial; 256 __le32 *buf; 257 int result, i, length; 258 259 /* Number of integers required to contain the array */ 260 length = (((size - 1) | 3) + 1)/4; 261 262 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL); 263 if (!buf) { 264 dev_err(&port->dev, "%s - out of memory.\n", __func__); 265 return -ENOMEM; 266 } 267 268 /* Issue the request, attempting to read 'size' bytes */ 269 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 270 request, REQTYPE_DEVICE_TO_HOST, 0x0000, 271 0, buf, size, 300); 272 273 /* Convert data into an array of integers */ 274 for (i = 0; i < length; i++) 275 data[i] = le32_to_cpu(buf[i]); 276 277 kfree(buf); 278 279 if (result != size) { 280 dbg("%s - Unable to send config request, " 281 "request=0x%x size=%d result=%d\n", 282 __func__, request, size, result); 283 return -EPROTO; 284 } 285 286 return 0; 287 } 288 289 /* 290 * cp210x_set_config 291 * Writes to the CP210x configuration registers 292 * Values less than 16 bits wide are sent directly 293 * 'size' is specified in bytes. 294 */ 295 static int cp210x_set_config(struct usb_serial_port *port, u8 request, 296 unsigned int *data, int size) 297 { 298 struct usb_serial *serial = port->serial; 299 __le32 *buf; 300 int result, i, length; 301 302 /* Number of integers required to contain the array */ 303 length = (((size - 1) | 3) + 1)/4; 304 305 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL); 306 if (!buf) { 307 dev_err(&port->dev, "%s - out of memory.\n", 308 __func__); 309 return -ENOMEM; 310 } 311 312 /* Array of integers into bytes */ 313 for (i = 0; i < length; i++) 314 buf[i] = cpu_to_le32(data[i]); 315 316 if (size > 2) { 317 result = usb_control_msg(serial->dev, 318 usb_sndctrlpipe(serial->dev, 0), 319 request, REQTYPE_HOST_TO_DEVICE, 0x0000, 320 0, buf, size, 300); 321 } else { 322 result = usb_control_msg(serial->dev, 323 usb_sndctrlpipe(serial->dev, 0), 324 request, REQTYPE_HOST_TO_DEVICE, data[0], 325 0, NULL, 0, 300); 326 } 327 328 kfree(buf); 329 330 if ((size > 2 && result != size) || result < 0) { 331 dbg("%s - Unable to send request, " 332 "request=0x%x size=%d result=%d\n", 333 __func__, request, size, result); 334 return -EPROTO; 335 } 336 337 return 0; 338 } 339 340 /* 341 * cp210x_set_config_single 342 * Convenience function for calling cp210x_set_config on single data values 343 * without requiring an integer pointer 344 */ 345 static inline int cp210x_set_config_single(struct usb_serial_port *port, 346 u8 request, unsigned int data) 347 { 348 return cp210x_set_config(port, request, &data, 2); 349 } 350 351 /* 352 * cp210x_quantise_baudrate 353 * Quantises the baud rate as per AN205 Table 1 354 */ 355 static unsigned int cp210x_quantise_baudrate(unsigned int baud) { 356 if (baud <= 56) baud = 0; 357 else if (baud <= 300) baud = 300; 358 else if (baud <= 600) baud = 600; 359 else if (baud <= 1200) baud = 1200; 360 else if (baud <= 1800) baud = 1800; 361 else if (baud <= 2400) baud = 2400; 362 else if (baud <= 4000) baud = 4000; 363 else if (baud <= 4803) baud = 4800; 364 else if (baud <= 7207) baud = 7200; 365 else if (baud <= 9612) baud = 9600; 366 else if (baud <= 14428) baud = 14400; 367 else if (baud <= 16062) baud = 16000; 368 else if (baud <= 19250) baud = 19200; 369 else if (baud <= 28912) baud = 28800; 370 else if (baud <= 38601) baud = 38400; 371 else if (baud <= 51558) baud = 51200; 372 else if (baud <= 56280) baud = 56000; 373 else if (baud <= 58053) baud = 57600; 374 else if (baud <= 64111) baud = 64000; 375 else if (baud <= 77608) baud = 76800; 376 else if (baud <= 117028) baud = 115200; 377 else if (baud <= 129347) baud = 128000; 378 else if (baud <= 156868) baud = 153600; 379 else if (baud <= 237832) baud = 230400; 380 else if (baud <= 254234) baud = 250000; 381 else if (baud <= 273066) baud = 256000; 382 else if (baud <= 491520) baud = 460800; 383 else if (baud <= 567138) baud = 500000; 384 else if (baud <= 670254) baud = 576000; 385 else if (baud <= 1053257) baud = 921600; 386 else if (baud <= 1474560) baud = 1228800; 387 else if (baud <= 2457600) baud = 1843200; 388 else baud = 3686400; 389 return baud; 390 } 391 392 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port) 393 { 394 int result; 395 396 dbg("%s - port %d", __func__, port->number); 397 398 if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) { 399 dev_err(&port->dev, "%s - Unable to enable UART\n", 400 __func__); 401 return -EPROTO; 402 } 403 404 result = usb_serial_generic_open(tty, port); 405 if (result) 406 return result; 407 408 /* Configure the termios structure */ 409 cp210x_get_termios(tty, port); 410 return 0; 411 } 412 413 static void cp210x_close(struct usb_serial_port *port) 414 { 415 dbg("%s - port %d", __func__, port->number); 416 417 usb_serial_generic_close(port); 418 419 mutex_lock(&port->serial->disc_mutex); 420 if (!port->serial->disconnected) 421 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE); 422 mutex_unlock(&port->serial->disc_mutex); 423 } 424 425 /* 426 * cp210x_get_termios 427 * Reads the baud rate, data bits, parity, stop bits and flow control mode 428 * from the device, corrects any unsupported values, and configures the 429 * termios structure to reflect the state of the device 430 */ 431 static void cp210x_get_termios(struct tty_struct *tty, 432 struct usb_serial_port *port) 433 { 434 unsigned int baud; 435 436 if (tty) { 437 cp210x_get_termios_port(tty->driver_data, 438 &tty->termios->c_cflag, &baud); 439 tty_encode_baud_rate(tty, baud, baud); 440 } 441 442 else { 443 unsigned int cflag; 444 cflag = 0; 445 cp210x_get_termios_port(port, &cflag, &baud); 446 } 447 } 448 449 /* 450 * cp210x_get_termios_port 451 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port. 452 */ 453 static void cp210x_get_termios_port(struct usb_serial_port *port, 454 unsigned int *cflagp, unsigned int *baudp) 455 { 456 unsigned int cflag, modem_ctl[4]; 457 unsigned int baud; 458 unsigned int bits; 459 460 dbg("%s - port %d", __func__, port->number); 461 462 cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2); 463 /* Convert to baudrate */ 464 if (baud) 465 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud); 466 467 dbg("%s - baud rate = %d", __func__, baud); 468 *baudp = baud; 469 470 cflag = *cflagp; 471 472 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 473 cflag &= ~CSIZE; 474 switch (bits & BITS_DATA_MASK) { 475 case BITS_DATA_5: 476 dbg("%s - data bits = 5", __func__); 477 cflag |= CS5; 478 break; 479 case BITS_DATA_6: 480 dbg("%s - data bits = 6", __func__); 481 cflag |= CS6; 482 break; 483 case BITS_DATA_7: 484 dbg("%s - data bits = 7", __func__); 485 cflag |= CS7; 486 break; 487 case BITS_DATA_8: 488 dbg("%s - data bits = 8", __func__); 489 cflag |= CS8; 490 break; 491 case BITS_DATA_9: 492 dbg("%s - data bits = 9 (not supported, using 8 data bits)", 493 __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 default: 500 dbg("%s - Unknown number of data bits, using 8", __func__); 501 cflag |= CS8; 502 bits &= ~BITS_DATA_MASK; 503 bits |= BITS_DATA_8; 504 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 505 break; 506 } 507 508 switch (bits & BITS_PARITY_MASK) { 509 case BITS_PARITY_NONE: 510 dbg("%s - parity = NONE", __func__); 511 cflag &= ~PARENB; 512 break; 513 case BITS_PARITY_ODD: 514 dbg("%s - parity = ODD", __func__); 515 cflag |= (PARENB|PARODD); 516 break; 517 case BITS_PARITY_EVEN: 518 dbg("%s - parity = EVEN", __func__); 519 cflag &= ~PARODD; 520 cflag |= PARENB; 521 break; 522 case BITS_PARITY_MARK: 523 dbg("%s - parity = MARK (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 case BITS_PARITY_SPACE: 530 dbg("%s - parity = SPACE (not supported, disabling parity)", 531 __func__); 532 cflag &= ~PARENB; 533 bits &= ~BITS_PARITY_MASK; 534 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 535 break; 536 default: 537 dbg("%s - Unknown parity mode, disabling parity", __func__); 538 cflag &= ~PARENB; 539 bits &= ~BITS_PARITY_MASK; 540 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 541 break; 542 } 543 544 cflag &= ~CSTOPB; 545 switch (bits & BITS_STOP_MASK) { 546 case BITS_STOP_1: 547 dbg("%s - stop bits = 1", __func__); 548 break; 549 case BITS_STOP_1_5: 550 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)", 551 __func__); 552 bits &= ~BITS_STOP_MASK; 553 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 554 break; 555 case BITS_STOP_2: 556 dbg("%s - stop bits = 2", __func__); 557 cflag |= CSTOPB; 558 break; 559 default: 560 dbg("%s - Unknown number of stop bits, using 1 stop bit", 561 __func__); 562 bits &= ~BITS_STOP_MASK; 563 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 564 break; 565 } 566 567 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 568 if (modem_ctl[0] & 0x0008) { 569 dbg("%s - flow control = CRTSCTS", __func__); 570 cflag |= CRTSCTS; 571 } else { 572 dbg("%s - flow control = NONE", __func__); 573 cflag &= ~CRTSCTS; 574 } 575 576 *cflagp = cflag; 577 } 578 579 static void cp210x_set_termios(struct tty_struct *tty, 580 struct usb_serial_port *port, struct ktermios *old_termios) 581 { 582 unsigned int cflag, old_cflag; 583 unsigned int baud = 0, bits; 584 unsigned int modem_ctl[4]; 585 586 dbg("%s - port %d", __func__, port->number); 587 588 if (!tty) 589 return; 590 591 tty->termios->c_cflag &= ~CMSPAR; 592 cflag = tty->termios->c_cflag; 593 old_cflag = old_termios->c_cflag; 594 baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty)); 595 596 /* If the baud rate is to be updated*/ 597 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) { 598 dbg("%s - Setting baud rate to %d baud", __func__, 599 baud); 600 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV, 601 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) { 602 dbg("Baud rate requested not supported by device"); 603 baud = tty_termios_baud_rate(old_termios); 604 } 605 } 606 /* Report back the resulting baud rate */ 607 tty_encode_baud_rate(tty, baud, baud); 608 609 /* If the number of data bits is to be updated */ 610 if ((cflag & CSIZE) != (old_cflag & CSIZE)) { 611 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 612 bits &= ~BITS_DATA_MASK; 613 switch (cflag & CSIZE) { 614 case CS5: 615 bits |= BITS_DATA_5; 616 dbg("%s - data bits = 5", __func__); 617 break; 618 case CS6: 619 bits |= BITS_DATA_6; 620 dbg("%s - data bits = 6", __func__); 621 break; 622 case CS7: 623 bits |= BITS_DATA_7; 624 dbg("%s - data bits = 7", __func__); 625 break; 626 case CS8: 627 bits |= BITS_DATA_8; 628 dbg("%s - data bits = 8", __func__); 629 break; 630 /*case CS9: 631 bits |= BITS_DATA_9; 632 dbg("%s - data bits = 9", __func__); 633 break;*/ 634 default: 635 dbg("cp210x driver does not " 636 "support the number of bits requested," 637 " using 8 bit mode\n"); 638 bits |= BITS_DATA_8; 639 break; 640 } 641 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 642 dbg("Number of data bits requested " 643 "not supported by device\n"); 644 } 645 646 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) { 647 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 648 bits &= ~BITS_PARITY_MASK; 649 if (cflag & PARENB) { 650 if (cflag & PARODD) { 651 bits |= BITS_PARITY_ODD; 652 dbg("%s - parity = ODD", __func__); 653 } else { 654 bits |= BITS_PARITY_EVEN; 655 dbg("%s - parity = EVEN", __func__); 656 } 657 } 658 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 659 dbg("Parity mode not supported " 660 "by device\n"); 661 } 662 663 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { 664 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 665 bits &= ~BITS_STOP_MASK; 666 if (cflag & CSTOPB) { 667 bits |= BITS_STOP_2; 668 dbg("%s - stop bits = 2", __func__); 669 } else { 670 bits |= BITS_STOP_1; 671 dbg("%s - stop bits = 1", __func__); 672 } 673 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 674 dbg("Number of stop bits requested " 675 "not supported by device\n"); 676 } 677 678 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { 679 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 680 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", 681 __func__, modem_ctl[0], modem_ctl[1], 682 modem_ctl[2], modem_ctl[3]); 683 684 if (cflag & CRTSCTS) { 685 modem_ctl[0] &= ~0x7B; 686 modem_ctl[0] |= 0x09; 687 modem_ctl[1] = 0x80; 688 dbg("%s - flow control = CRTSCTS", __func__); 689 } else { 690 modem_ctl[0] &= ~0x7B; 691 modem_ctl[0] |= 0x01; 692 modem_ctl[1] |= 0x40; 693 dbg("%s - flow control = NONE", __func__); 694 } 695 696 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", 697 __func__, modem_ctl[0], modem_ctl[1], 698 modem_ctl[2], modem_ctl[3]); 699 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16); 700 } 701 702 } 703 704 static int cp210x_tiocmset (struct tty_struct *tty, 705 unsigned int set, unsigned int clear) 706 { 707 struct usb_serial_port *port = tty->driver_data; 708 return cp210x_tiocmset_port(port, set, clear); 709 } 710 711 static int cp210x_tiocmset_port(struct usb_serial_port *port, 712 unsigned int set, unsigned int clear) 713 { 714 unsigned int control = 0; 715 716 dbg("%s - port %d", __func__, port->number); 717 718 if (set & TIOCM_RTS) { 719 control |= CONTROL_RTS; 720 control |= CONTROL_WRITE_RTS; 721 } 722 if (set & TIOCM_DTR) { 723 control |= CONTROL_DTR; 724 control |= CONTROL_WRITE_DTR; 725 } 726 if (clear & TIOCM_RTS) { 727 control &= ~CONTROL_RTS; 728 control |= CONTROL_WRITE_RTS; 729 } 730 if (clear & TIOCM_DTR) { 731 control &= ~CONTROL_DTR; 732 control |= CONTROL_WRITE_DTR; 733 } 734 735 dbg("%s - control = 0x%.4x", __func__, control); 736 737 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2); 738 } 739 740 static void cp210x_dtr_rts(struct usb_serial_port *p, int on) 741 { 742 if (on) 743 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0); 744 else 745 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS); 746 } 747 748 static int cp210x_tiocmget (struct tty_struct *tty) 749 { 750 struct usb_serial_port *port = tty->driver_data; 751 unsigned int control; 752 int result; 753 754 dbg("%s - port %d", __func__, port->number); 755 756 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1); 757 758 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) 759 |((control & CONTROL_RTS) ? TIOCM_RTS : 0) 760 |((control & CONTROL_CTS) ? TIOCM_CTS : 0) 761 |((control & CONTROL_DSR) ? TIOCM_DSR : 0) 762 |((control & CONTROL_RING)? TIOCM_RI : 0) 763 |((control & CONTROL_DCD) ? TIOCM_CD : 0); 764 765 dbg("%s - control = 0x%.2x", __func__, control); 766 767 return result; 768 } 769 770 static void cp210x_break_ctl (struct tty_struct *tty, int break_state) 771 { 772 struct usb_serial_port *port = tty->driver_data; 773 unsigned int state; 774 775 dbg("%s - port %d", __func__, port->number); 776 if (break_state == 0) 777 state = BREAK_OFF; 778 else 779 state = BREAK_ON; 780 dbg("%s - turning break %s", __func__, 781 state == BREAK_OFF ? "off" : "on"); 782 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2); 783 } 784 785 static int cp210x_startup(struct usb_serial *serial) 786 { 787 /* cp210x buffers behave strangely unless device is reset */ 788 usb_reset_device(serial->dev); 789 return 0; 790 } 791 792 static int __init cp210x_init(void) 793 { 794 int retval; 795 796 retval = usb_serial_register(&cp210x_device); 797 if (retval) 798 return retval; /* Failed to register */ 799 800 retval = usb_register(&cp210x_driver); 801 if (retval) { 802 /* Failed to register */ 803 usb_serial_deregister(&cp210x_device); 804 return retval; 805 } 806 807 /* Success */ 808 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 809 DRIVER_DESC "\n"); 810 return 0; 811 } 812 813 static void __exit cp210x_exit(void) 814 { 815 usb_deregister(&cp210x_driver); 816 usb_serial_deregister(&cp210x_device); 817 } 818 819 module_init(cp210x_init); 820 module_exit(cp210x_exit); 821 822 MODULE_DESCRIPTION(DRIVER_DESC); 823 MODULE_VERSION(DRIVER_VERSION); 824 MODULE_LICENSE("GPL"); 825 826 module_param(debug, bool, S_IRUGO | S_IWUSR); 827 MODULE_PARM_DESC(debug, "Enable verbose debugging messages"); 828