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 bool 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, 0x81A9) }, /* Multiplex RC Interface */ 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 demonstration module */ 106 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis 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, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */ 112 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */ 113 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */ 114 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */ 115 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */ 116 { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */ 117 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */ 118 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */ 119 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */ 120 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ 121 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ 122 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */ 123 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */ 124 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */ 125 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */ 126 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */ 127 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ 128 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */ 129 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ 130 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */ 131 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ 132 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ 133 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */ 134 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */ 135 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */ 136 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */ 137 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */ 138 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */ 139 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */ 140 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */ 141 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */ 142 { } /* Terminating Entry */ 143 }; 144 145 MODULE_DEVICE_TABLE(usb, id_table); 146 147 static struct usb_driver cp210x_driver = { 148 .name = "cp210x", 149 .probe = usb_serial_probe, 150 .disconnect = usb_serial_disconnect, 151 .id_table = id_table, 152 .no_dynamic_id = 1, 153 }; 154 155 static struct usb_serial_driver cp210x_device = { 156 .driver = { 157 .owner = THIS_MODULE, 158 .name = "cp210x", 159 }, 160 .usb_driver = &cp210x_driver, 161 .id_table = id_table, 162 .num_ports = 1, 163 .bulk_in_size = 256, 164 .bulk_out_size = 256, 165 .open = cp210x_open, 166 .close = cp210x_close, 167 .break_ctl = cp210x_break_ctl, 168 .set_termios = cp210x_set_termios, 169 .tiocmget = cp210x_tiocmget, 170 .tiocmset = cp210x_tiocmset, 171 .attach = cp210x_startup, 172 .dtr_rts = cp210x_dtr_rts 173 }; 174 175 /* Config request types */ 176 #define REQTYPE_HOST_TO_DEVICE 0x41 177 #define REQTYPE_DEVICE_TO_HOST 0xc1 178 179 /* Config request codes */ 180 #define CP210X_IFC_ENABLE 0x00 181 #define CP210X_SET_BAUDDIV 0x01 182 #define CP210X_GET_BAUDDIV 0x02 183 #define CP210X_SET_LINE_CTL 0x03 184 #define CP210X_GET_LINE_CTL 0x04 185 #define CP210X_SET_BREAK 0x05 186 #define CP210X_IMM_CHAR 0x06 187 #define CP210X_SET_MHS 0x07 188 #define CP210X_GET_MDMSTS 0x08 189 #define CP210X_SET_XON 0x09 190 #define CP210X_SET_XOFF 0x0A 191 #define CP210X_SET_EVENTMASK 0x0B 192 #define CP210X_GET_EVENTMASK 0x0C 193 #define CP210X_SET_CHAR 0x0D 194 #define CP210X_GET_CHARS 0x0E 195 #define CP210X_GET_PROPS 0x0F 196 #define CP210X_GET_COMM_STATUS 0x10 197 #define CP210X_RESET 0x11 198 #define CP210X_PURGE 0x12 199 #define CP210X_SET_FLOW 0x13 200 #define CP210X_GET_FLOW 0x14 201 #define CP210X_EMBED_EVENTS 0x15 202 #define CP210X_GET_EVENTSTATE 0x16 203 #define CP210X_SET_CHARS 0x19 204 205 /* CP210X_IFC_ENABLE */ 206 #define UART_ENABLE 0x0001 207 #define UART_DISABLE 0x0000 208 209 /* CP210X_(SET|GET)_BAUDDIV */ 210 #define BAUD_RATE_GEN_FREQ 0x384000 211 212 /* CP210X_(SET|GET)_LINE_CTL */ 213 #define BITS_DATA_MASK 0X0f00 214 #define BITS_DATA_5 0X0500 215 #define BITS_DATA_6 0X0600 216 #define BITS_DATA_7 0X0700 217 #define BITS_DATA_8 0X0800 218 #define BITS_DATA_9 0X0900 219 220 #define BITS_PARITY_MASK 0x00f0 221 #define BITS_PARITY_NONE 0x0000 222 #define BITS_PARITY_ODD 0x0010 223 #define BITS_PARITY_EVEN 0x0020 224 #define BITS_PARITY_MARK 0x0030 225 #define BITS_PARITY_SPACE 0x0040 226 227 #define BITS_STOP_MASK 0x000f 228 #define BITS_STOP_1 0x0000 229 #define BITS_STOP_1_5 0x0001 230 #define BITS_STOP_2 0x0002 231 232 /* CP210X_SET_BREAK */ 233 #define BREAK_ON 0x0001 234 #define BREAK_OFF 0x0000 235 236 /* CP210X_(SET_MHS|GET_MDMSTS) */ 237 #define CONTROL_DTR 0x0001 238 #define CONTROL_RTS 0x0002 239 #define CONTROL_CTS 0x0010 240 #define CONTROL_DSR 0x0020 241 #define CONTROL_RING 0x0040 242 #define CONTROL_DCD 0x0080 243 #define CONTROL_WRITE_DTR 0x0100 244 #define CONTROL_WRITE_RTS 0x0200 245 246 /* 247 * cp210x_get_config 248 * Reads from the CP210x configuration registers 249 * 'size' is specified in bytes. 250 * 'data' is a pointer to a pre-allocated array of integers large 251 * enough to hold 'size' bytes (with 4 bytes to each integer) 252 */ 253 static int cp210x_get_config(struct usb_serial_port *port, u8 request, 254 unsigned int *data, int size) 255 { 256 struct usb_serial *serial = port->serial; 257 __le32 *buf; 258 int result, i, length; 259 260 /* Number of integers required to contain the array */ 261 length = (((size - 1) | 3) + 1)/4; 262 263 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL); 264 if (!buf) { 265 dev_err(&port->dev, "%s - out of memory.\n", __func__); 266 return -ENOMEM; 267 } 268 269 /* Issue the request, attempting to read 'size' bytes */ 270 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 271 request, REQTYPE_DEVICE_TO_HOST, 0x0000, 272 0, buf, size, 300); 273 274 /* Convert data into an array of integers */ 275 for (i = 0; i < length; i++) 276 data[i] = le32_to_cpu(buf[i]); 277 278 kfree(buf); 279 280 if (result != size) { 281 dbg("%s - Unable to send config request, " 282 "request=0x%x size=%d result=%d", 283 __func__, request, size, result); 284 if (result > 0) 285 result = -EPROTO; 286 287 return result; 288 } 289 290 return 0; 291 } 292 293 /* 294 * cp210x_set_config 295 * Writes to the CP210x configuration registers 296 * Values less than 16 bits wide are sent directly 297 * 'size' is specified in bytes. 298 */ 299 static int cp210x_set_config(struct usb_serial_port *port, u8 request, 300 unsigned int *data, int size) 301 { 302 struct usb_serial *serial = port->serial; 303 __le32 *buf; 304 int result, i, length; 305 306 /* Number of integers required to contain the array */ 307 length = (((size - 1) | 3) + 1)/4; 308 309 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL); 310 if (!buf) { 311 dev_err(&port->dev, "%s - out of memory.\n", 312 __func__); 313 return -ENOMEM; 314 } 315 316 /* Array of integers into bytes */ 317 for (i = 0; i < length; i++) 318 buf[i] = cpu_to_le32(data[i]); 319 320 if (size > 2) { 321 result = usb_control_msg(serial->dev, 322 usb_sndctrlpipe(serial->dev, 0), 323 request, REQTYPE_HOST_TO_DEVICE, 0x0000, 324 0, buf, size, 300); 325 } else { 326 result = usb_control_msg(serial->dev, 327 usb_sndctrlpipe(serial->dev, 0), 328 request, REQTYPE_HOST_TO_DEVICE, data[0], 329 0, NULL, 0, 300); 330 } 331 332 kfree(buf); 333 334 if ((size > 2 && result != size) || result < 0) { 335 dbg("%s - Unable to send request, " 336 "request=0x%x size=%d result=%d", 337 __func__, request, size, result); 338 if (result > 0) 339 result = -EPROTO; 340 341 return result; 342 } 343 344 return 0; 345 } 346 347 /* 348 * cp210x_set_config_single 349 * Convenience function for calling cp210x_set_config on single data values 350 * without requiring an integer pointer 351 */ 352 static inline int cp210x_set_config_single(struct usb_serial_port *port, 353 u8 request, unsigned int data) 354 { 355 return cp210x_set_config(port, request, &data, 2); 356 } 357 358 /* 359 * cp210x_quantise_baudrate 360 * Quantises the baud rate as per AN205 Table 1 361 */ 362 static unsigned int cp210x_quantise_baudrate(unsigned int baud) { 363 if (baud <= 56) baud = 0; 364 else if (baud <= 300) baud = 300; 365 else if (baud <= 600) baud = 600; 366 else if (baud <= 1200) baud = 1200; 367 else if (baud <= 1800) baud = 1800; 368 else if (baud <= 2400) baud = 2400; 369 else if (baud <= 4000) baud = 4000; 370 else if (baud <= 4803) baud = 4800; 371 else if (baud <= 7207) baud = 7200; 372 else if (baud <= 9612) baud = 9600; 373 else if (baud <= 14428) baud = 14400; 374 else if (baud <= 16062) baud = 16000; 375 else if (baud <= 19250) baud = 19200; 376 else if (baud <= 28912) baud = 28800; 377 else if (baud <= 38601) baud = 38400; 378 else if (baud <= 51558) baud = 51200; 379 else if (baud <= 56280) baud = 56000; 380 else if (baud <= 58053) baud = 57600; 381 else if (baud <= 64111) baud = 64000; 382 else if (baud <= 77608) baud = 76800; 383 else if (baud <= 117028) baud = 115200; 384 else if (baud <= 129347) baud = 128000; 385 else if (baud <= 156868) baud = 153600; 386 else if (baud <= 237832) baud = 230400; 387 else if (baud <= 254234) baud = 250000; 388 else if (baud <= 273066) baud = 256000; 389 else if (baud <= 491520) baud = 460800; 390 else if (baud <= 567138) baud = 500000; 391 else if (baud <= 670254) baud = 576000; 392 else if (baud <= 1053257) baud = 921600; 393 else if (baud <= 1474560) baud = 1228800; 394 else if (baud <= 2457600) baud = 1843200; 395 else baud = 3686400; 396 return baud; 397 } 398 399 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port) 400 { 401 int result; 402 403 dbg("%s - port %d", __func__, port->number); 404 405 result = cp210x_set_config_single(port, CP210X_IFC_ENABLE, 406 UART_ENABLE); 407 if (result) { 408 dev_err(&port->dev, "%s - Unable to enable UART\n", __func__); 409 return result; 410 } 411 412 result = usb_serial_generic_open(tty, port); 413 if (result) 414 return result; 415 416 /* Configure the termios structure */ 417 cp210x_get_termios(tty, port); 418 return 0; 419 } 420 421 static void cp210x_close(struct usb_serial_port *port) 422 { 423 dbg("%s - port %d", __func__, port->number); 424 425 usb_serial_generic_close(port); 426 427 mutex_lock(&port->serial->disc_mutex); 428 if (!port->serial->disconnected) 429 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE); 430 mutex_unlock(&port->serial->disc_mutex); 431 } 432 433 /* 434 * cp210x_get_termios 435 * Reads the baud rate, data bits, parity, stop bits and flow control mode 436 * from the device, corrects any unsupported values, and configures the 437 * termios structure to reflect the state of the device 438 */ 439 static void cp210x_get_termios(struct tty_struct *tty, 440 struct usb_serial_port *port) 441 { 442 unsigned int baud; 443 444 if (tty) { 445 cp210x_get_termios_port(tty->driver_data, 446 &tty->termios->c_cflag, &baud); 447 tty_encode_baud_rate(tty, baud, baud); 448 } 449 450 else { 451 unsigned int cflag; 452 cflag = 0; 453 cp210x_get_termios_port(port, &cflag, &baud); 454 } 455 } 456 457 /* 458 * cp210x_get_termios_port 459 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port. 460 */ 461 static void cp210x_get_termios_port(struct usb_serial_port *port, 462 unsigned int *cflagp, unsigned int *baudp) 463 { 464 unsigned int cflag, modem_ctl[4]; 465 unsigned int baud; 466 unsigned int bits; 467 468 dbg("%s - port %d", __func__, port->number); 469 470 cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2); 471 /* Convert to baudrate */ 472 if (baud) 473 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud); 474 475 dbg("%s - baud rate = %d", __func__, baud); 476 *baudp = baud; 477 478 cflag = *cflagp; 479 480 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 481 cflag &= ~CSIZE; 482 switch (bits & BITS_DATA_MASK) { 483 case BITS_DATA_5: 484 dbg("%s - data bits = 5", __func__); 485 cflag |= CS5; 486 break; 487 case BITS_DATA_6: 488 dbg("%s - data bits = 6", __func__); 489 cflag |= CS6; 490 break; 491 case BITS_DATA_7: 492 dbg("%s - data bits = 7", __func__); 493 cflag |= CS7; 494 break; 495 case BITS_DATA_8: 496 dbg("%s - data bits = 8", __func__); 497 cflag |= CS8; 498 break; 499 case BITS_DATA_9: 500 dbg("%s - data bits = 9 (not supported, using 8 data bits)", 501 __func__); 502 cflag |= CS8; 503 bits &= ~BITS_DATA_MASK; 504 bits |= BITS_DATA_8; 505 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 506 break; 507 default: 508 dbg("%s - Unknown number of data bits, using 8", __func__); 509 cflag |= CS8; 510 bits &= ~BITS_DATA_MASK; 511 bits |= BITS_DATA_8; 512 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 513 break; 514 } 515 516 switch (bits & BITS_PARITY_MASK) { 517 case BITS_PARITY_NONE: 518 dbg("%s - parity = NONE", __func__); 519 cflag &= ~PARENB; 520 break; 521 case BITS_PARITY_ODD: 522 dbg("%s - parity = ODD", __func__); 523 cflag |= (PARENB|PARODD); 524 break; 525 case BITS_PARITY_EVEN: 526 dbg("%s - parity = EVEN", __func__); 527 cflag &= ~PARODD; 528 cflag |= PARENB; 529 break; 530 case BITS_PARITY_MARK: 531 dbg("%s - parity = MARK", __func__); 532 cflag |= (PARENB|PARODD|CMSPAR); 533 break; 534 case BITS_PARITY_SPACE: 535 dbg("%s - parity = SPACE", __func__); 536 cflag &= ~PARODD; 537 cflag |= (PARENB|CMSPAR); 538 break; 539 default: 540 dbg("%s - Unknown parity mode, disabling parity", __func__); 541 cflag &= ~PARENB; 542 bits &= ~BITS_PARITY_MASK; 543 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 544 break; 545 } 546 547 cflag &= ~CSTOPB; 548 switch (bits & BITS_STOP_MASK) { 549 case BITS_STOP_1: 550 dbg("%s - stop bits = 1", __func__); 551 break; 552 case BITS_STOP_1_5: 553 dbg("%s - stop bits = 1.5 (not supported, 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 case BITS_STOP_2: 559 dbg("%s - stop bits = 2", __func__); 560 cflag |= CSTOPB; 561 break; 562 default: 563 dbg("%s - Unknown number of stop bits, using 1 stop bit", 564 __func__); 565 bits &= ~BITS_STOP_MASK; 566 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 567 break; 568 } 569 570 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 571 if (modem_ctl[0] & 0x0008) { 572 dbg("%s - flow control = CRTSCTS", __func__); 573 cflag |= CRTSCTS; 574 } else { 575 dbg("%s - flow control = NONE", __func__); 576 cflag &= ~CRTSCTS; 577 } 578 579 *cflagp = cflag; 580 } 581 582 static void cp210x_set_termios(struct tty_struct *tty, 583 struct usb_serial_port *port, struct ktermios *old_termios) 584 { 585 unsigned int cflag, old_cflag; 586 unsigned int baud = 0, bits; 587 unsigned int modem_ctl[4]; 588 589 dbg("%s - port %d", __func__, port->number); 590 591 if (!tty) 592 return; 593 594 cflag = tty->termios->c_cflag; 595 old_cflag = old_termios->c_cflag; 596 baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty)); 597 598 /* If the baud rate is to be updated*/ 599 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) { 600 dbg("%s - Setting baud rate to %d baud", __func__, 601 baud); 602 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV, 603 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) { 604 dbg("Baud rate requested not supported by device"); 605 baud = tty_termios_baud_rate(old_termios); 606 } 607 } 608 /* Report back the resulting baud rate */ 609 tty_encode_baud_rate(tty, baud, baud); 610 611 /* If the number of data bits is to be updated */ 612 if ((cflag & CSIZE) != (old_cflag & CSIZE)) { 613 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 614 bits &= ~BITS_DATA_MASK; 615 switch (cflag & CSIZE) { 616 case CS5: 617 bits |= BITS_DATA_5; 618 dbg("%s - data bits = 5", __func__); 619 break; 620 case CS6: 621 bits |= BITS_DATA_6; 622 dbg("%s - data bits = 6", __func__); 623 break; 624 case CS7: 625 bits |= BITS_DATA_7; 626 dbg("%s - data bits = 7", __func__); 627 break; 628 case CS8: 629 bits |= BITS_DATA_8; 630 dbg("%s - data bits = 8", __func__); 631 break; 632 /*case CS9: 633 bits |= BITS_DATA_9; 634 dbg("%s - data bits = 9", __func__); 635 break;*/ 636 default: 637 dbg("cp210x driver does not " 638 "support the number of bits requested," 639 " using 8 bit mode"); 640 bits |= BITS_DATA_8; 641 break; 642 } 643 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 644 dbg("Number of data bits requested " 645 "not supported by device"); 646 } 647 648 if ((cflag & (PARENB|PARODD|CMSPAR)) != 649 (old_cflag & (PARENB|PARODD|CMSPAR))) { 650 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 651 bits &= ~BITS_PARITY_MASK; 652 if (cflag & PARENB) { 653 if (cflag & CMSPAR) { 654 if (cflag & PARODD) { 655 bits |= BITS_PARITY_MARK; 656 dbg("%s - parity = MARK", __func__); 657 } else { 658 bits |= BITS_PARITY_SPACE; 659 dbg("%s - parity = SPACE", __func__); 660 } 661 } else { 662 if (cflag & PARODD) { 663 bits |= BITS_PARITY_ODD; 664 dbg("%s - parity = ODD", __func__); 665 } else { 666 bits |= BITS_PARITY_EVEN; 667 dbg("%s - parity = EVEN", __func__); 668 } 669 } 670 } 671 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 672 dbg("Parity mode not supported by device"); 673 } 674 675 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { 676 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 677 bits &= ~BITS_STOP_MASK; 678 if (cflag & CSTOPB) { 679 bits |= BITS_STOP_2; 680 dbg("%s - stop bits = 2", __func__); 681 } else { 682 bits |= BITS_STOP_1; 683 dbg("%s - stop bits = 1", __func__); 684 } 685 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 686 dbg("Number of stop bits requested " 687 "not supported by device"); 688 } 689 690 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { 691 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 692 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", 693 __func__, modem_ctl[0], modem_ctl[1], 694 modem_ctl[2], modem_ctl[3]); 695 696 if (cflag & CRTSCTS) { 697 modem_ctl[0] &= ~0x7B; 698 modem_ctl[0] |= 0x09; 699 modem_ctl[1] = 0x80; 700 dbg("%s - flow control = CRTSCTS", __func__); 701 } else { 702 modem_ctl[0] &= ~0x7B; 703 modem_ctl[0] |= 0x01; 704 modem_ctl[1] |= 0x40; 705 dbg("%s - flow control = NONE", __func__); 706 } 707 708 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", 709 __func__, modem_ctl[0], modem_ctl[1], 710 modem_ctl[2], modem_ctl[3]); 711 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16); 712 } 713 714 } 715 716 static int cp210x_tiocmset (struct tty_struct *tty, 717 unsigned int set, unsigned int clear) 718 { 719 struct usb_serial_port *port = tty->driver_data; 720 return cp210x_tiocmset_port(port, set, clear); 721 } 722 723 static int cp210x_tiocmset_port(struct usb_serial_port *port, 724 unsigned int set, unsigned int clear) 725 { 726 unsigned int control = 0; 727 728 dbg("%s - port %d", __func__, port->number); 729 730 if (set & TIOCM_RTS) { 731 control |= CONTROL_RTS; 732 control |= CONTROL_WRITE_RTS; 733 } 734 if (set & TIOCM_DTR) { 735 control |= CONTROL_DTR; 736 control |= CONTROL_WRITE_DTR; 737 } 738 if (clear & TIOCM_RTS) { 739 control &= ~CONTROL_RTS; 740 control |= CONTROL_WRITE_RTS; 741 } 742 if (clear & TIOCM_DTR) { 743 control &= ~CONTROL_DTR; 744 control |= CONTROL_WRITE_DTR; 745 } 746 747 dbg("%s - control = 0x%.4x", __func__, control); 748 749 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2); 750 } 751 752 static void cp210x_dtr_rts(struct usb_serial_port *p, int on) 753 { 754 if (on) 755 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0); 756 else 757 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS); 758 } 759 760 static int cp210x_tiocmget (struct tty_struct *tty) 761 { 762 struct usb_serial_port *port = tty->driver_data; 763 unsigned int control; 764 int result; 765 766 dbg("%s - port %d", __func__, port->number); 767 768 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1); 769 770 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) 771 |((control & CONTROL_RTS) ? TIOCM_RTS : 0) 772 |((control & CONTROL_CTS) ? TIOCM_CTS : 0) 773 |((control & CONTROL_DSR) ? TIOCM_DSR : 0) 774 |((control & CONTROL_RING)? TIOCM_RI : 0) 775 |((control & CONTROL_DCD) ? TIOCM_CD : 0); 776 777 dbg("%s - control = 0x%.2x", __func__, control); 778 779 return result; 780 } 781 782 static void cp210x_break_ctl (struct tty_struct *tty, int break_state) 783 { 784 struct usb_serial_port *port = tty->driver_data; 785 unsigned int state; 786 787 dbg("%s - port %d", __func__, port->number); 788 if (break_state == 0) 789 state = BREAK_OFF; 790 else 791 state = BREAK_ON; 792 dbg("%s - turning break %s", __func__, 793 state == BREAK_OFF ? "off" : "on"); 794 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2); 795 } 796 797 static int cp210x_startup(struct usb_serial *serial) 798 { 799 /* cp210x buffers behave strangely unless device is reset */ 800 usb_reset_device(serial->dev); 801 return 0; 802 } 803 804 static int __init cp210x_init(void) 805 { 806 int retval; 807 808 retval = usb_serial_register(&cp210x_device); 809 if (retval) 810 return retval; /* Failed to register */ 811 812 retval = usb_register(&cp210x_driver); 813 if (retval) { 814 /* Failed to register */ 815 usb_serial_deregister(&cp210x_device); 816 return retval; 817 } 818 819 /* Success */ 820 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 821 DRIVER_DESC "\n"); 822 return 0; 823 } 824 825 static void __exit cp210x_exit(void) 826 { 827 usb_deregister(&cp210x_driver); 828 usb_serial_deregister(&cp210x_device); 829 } 830 831 module_init(cp210x_init); 832 module_exit(cp210x_exit); 833 834 MODULE_DESCRIPTION(DRIVER_DESC); 835 MODULE_VERSION(DRIVER_VERSION); 836 MODULE_LICENSE("GPL"); 837 838 module_param(debug, bool, S_IRUGO | S_IWUSR); 839 MODULE_PARM_DESC(debug, "Enable verbose debugging messages"); 840