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 if (result > 0) 284 result = -EPROTO; 285 286 return result; 287 } 288 289 return 0; 290 } 291 292 /* 293 * cp210x_set_config 294 * Writes to the CP210x configuration registers 295 * Values less than 16 bits wide are sent directly 296 * 'size' is specified in bytes. 297 */ 298 static int cp210x_set_config(struct usb_serial_port *port, u8 request, 299 unsigned int *data, int size) 300 { 301 struct usb_serial *serial = port->serial; 302 __le32 *buf; 303 int result, i, length; 304 305 /* Number of integers required to contain the array */ 306 length = (((size - 1) | 3) + 1)/4; 307 308 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL); 309 if (!buf) { 310 dev_err(&port->dev, "%s - out of memory.\n", 311 __func__); 312 return -ENOMEM; 313 } 314 315 /* Array of integers into bytes */ 316 for (i = 0; i < length; i++) 317 buf[i] = cpu_to_le32(data[i]); 318 319 if (size > 2) { 320 result = usb_control_msg(serial->dev, 321 usb_sndctrlpipe(serial->dev, 0), 322 request, REQTYPE_HOST_TO_DEVICE, 0x0000, 323 0, buf, size, 300); 324 } else { 325 result = usb_control_msg(serial->dev, 326 usb_sndctrlpipe(serial->dev, 0), 327 request, REQTYPE_HOST_TO_DEVICE, data[0], 328 0, NULL, 0, 300); 329 } 330 331 kfree(buf); 332 333 if ((size > 2 && result != size) || result < 0) { 334 dbg("%s - Unable to send request, " 335 "request=0x%x size=%d result=%d\n", 336 __func__, request, size, result); 337 if (result > 0) 338 result = -EPROTO; 339 340 return result; 341 } 342 343 return 0; 344 } 345 346 /* 347 * cp210x_set_config_single 348 * Convenience function for calling cp210x_set_config on single data values 349 * without requiring an integer pointer 350 */ 351 static inline int cp210x_set_config_single(struct usb_serial_port *port, 352 u8 request, unsigned int data) 353 { 354 return cp210x_set_config(port, request, &data, 2); 355 } 356 357 /* 358 * cp210x_quantise_baudrate 359 * Quantises the baud rate as per AN205 Table 1 360 */ 361 static unsigned int cp210x_quantise_baudrate(unsigned int baud) { 362 if (baud <= 56) baud = 0; 363 else if (baud <= 300) baud = 300; 364 else if (baud <= 600) baud = 600; 365 else if (baud <= 1200) baud = 1200; 366 else if (baud <= 1800) baud = 1800; 367 else if (baud <= 2400) baud = 2400; 368 else if (baud <= 4000) baud = 4000; 369 else if (baud <= 4803) baud = 4800; 370 else if (baud <= 7207) baud = 7200; 371 else if (baud <= 9612) baud = 9600; 372 else if (baud <= 14428) baud = 14400; 373 else if (baud <= 16062) baud = 16000; 374 else if (baud <= 19250) baud = 19200; 375 else if (baud <= 28912) baud = 28800; 376 else if (baud <= 38601) baud = 38400; 377 else if (baud <= 51558) baud = 51200; 378 else if (baud <= 56280) baud = 56000; 379 else if (baud <= 58053) baud = 57600; 380 else if (baud <= 64111) baud = 64000; 381 else if (baud <= 77608) baud = 76800; 382 else if (baud <= 117028) baud = 115200; 383 else if (baud <= 129347) baud = 128000; 384 else if (baud <= 156868) baud = 153600; 385 else if (baud <= 237832) baud = 230400; 386 else if (baud <= 254234) baud = 250000; 387 else if (baud <= 273066) baud = 256000; 388 else if (baud <= 491520) baud = 460800; 389 else if (baud <= 567138) baud = 500000; 390 else if (baud <= 670254) baud = 576000; 391 else if (baud <= 1053257) baud = 921600; 392 else if (baud <= 1474560) baud = 1228800; 393 else if (baud <= 2457600) baud = 1843200; 394 else baud = 3686400; 395 return baud; 396 } 397 398 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port) 399 { 400 int result; 401 402 dbg("%s - port %d", __func__, port->number); 403 404 result = cp210x_set_config_single(port, CP210X_IFC_ENABLE, 405 UART_ENABLE); 406 if (result) { 407 dev_err(&port->dev, "%s - Unable to enable UART\n", __func__); 408 return result; 409 } 410 411 result = usb_serial_generic_open(tty, port); 412 if (result) 413 return result; 414 415 /* Configure the termios structure */ 416 cp210x_get_termios(tty, port); 417 return 0; 418 } 419 420 static void cp210x_close(struct usb_serial_port *port) 421 { 422 dbg("%s - port %d", __func__, port->number); 423 424 usb_serial_generic_close(port); 425 426 mutex_lock(&port->serial->disc_mutex); 427 if (!port->serial->disconnected) 428 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE); 429 mutex_unlock(&port->serial->disc_mutex); 430 } 431 432 /* 433 * cp210x_get_termios 434 * Reads the baud rate, data bits, parity, stop bits and flow control mode 435 * from the device, corrects any unsupported values, and configures the 436 * termios structure to reflect the state of the device 437 */ 438 static void cp210x_get_termios(struct tty_struct *tty, 439 struct usb_serial_port *port) 440 { 441 unsigned int baud; 442 443 if (tty) { 444 cp210x_get_termios_port(tty->driver_data, 445 &tty->termios->c_cflag, &baud); 446 tty_encode_baud_rate(tty, baud, baud); 447 } 448 449 else { 450 unsigned int cflag; 451 cflag = 0; 452 cp210x_get_termios_port(port, &cflag, &baud); 453 } 454 } 455 456 /* 457 * cp210x_get_termios_port 458 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port. 459 */ 460 static void cp210x_get_termios_port(struct usb_serial_port *port, 461 unsigned int *cflagp, unsigned int *baudp) 462 { 463 unsigned int cflag, modem_ctl[4]; 464 unsigned int baud; 465 unsigned int bits; 466 467 dbg("%s - port %d", __func__, port->number); 468 469 cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2); 470 /* Convert to baudrate */ 471 if (baud) 472 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud); 473 474 dbg("%s - baud rate = %d", __func__, baud); 475 *baudp = baud; 476 477 cflag = *cflagp; 478 479 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 480 cflag &= ~CSIZE; 481 switch (bits & BITS_DATA_MASK) { 482 case BITS_DATA_5: 483 dbg("%s - data bits = 5", __func__); 484 cflag |= CS5; 485 break; 486 case BITS_DATA_6: 487 dbg("%s - data bits = 6", __func__); 488 cflag |= CS6; 489 break; 490 case BITS_DATA_7: 491 dbg("%s - data bits = 7", __func__); 492 cflag |= CS7; 493 break; 494 case BITS_DATA_8: 495 dbg("%s - data bits = 8", __func__); 496 cflag |= CS8; 497 break; 498 case BITS_DATA_9: 499 dbg("%s - data bits = 9 (not supported, using 8 data bits)", 500 __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 default: 507 dbg("%s - Unknown number of data bits, using 8", __func__); 508 cflag |= CS8; 509 bits &= ~BITS_DATA_MASK; 510 bits |= BITS_DATA_8; 511 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 512 break; 513 } 514 515 switch (bits & BITS_PARITY_MASK) { 516 case BITS_PARITY_NONE: 517 dbg("%s - parity = NONE", __func__); 518 cflag &= ~PARENB; 519 break; 520 case BITS_PARITY_ODD: 521 dbg("%s - parity = ODD", __func__); 522 cflag |= (PARENB|PARODD); 523 break; 524 case BITS_PARITY_EVEN: 525 dbg("%s - parity = EVEN", __func__); 526 cflag &= ~PARODD; 527 cflag |= PARENB; 528 break; 529 case BITS_PARITY_MARK: 530 dbg("%s - parity = MARK", __func__); 531 cflag |= (PARENB|PARODD|CMSPAR); 532 break; 533 case BITS_PARITY_SPACE: 534 dbg("%s - parity = SPACE", __func__); 535 cflag &= ~PARODD; 536 cflag |= (PARENB|CMSPAR); 537 break; 538 default: 539 dbg("%s - Unknown parity mode, disabling parity", __func__); 540 cflag &= ~PARENB; 541 bits &= ~BITS_PARITY_MASK; 542 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 543 break; 544 } 545 546 cflag &= ~CSTOPB; 547 switch (bits & BITS_STOP_MASK) { 548 case BITS_STOP_1: 549 dbg("%s - stop bits = 1", __func__); 550 break; 551 case BITS_STOP_1_5: 552 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)", 553 __func__); 554 bits &= ~BITS_STOP_MASK; 555 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 556 break; 557 case BITS_STOP_2: 558 dbg("%s - stop bits = 2", __func__); 559 cflag |= CSTOPB; 560 break; 561 default: 562 dbg("%s - Unknown number of stop bits, using 1 stop bit", 563 __func__); 564 bits &= ~BITS_STOP_MASK; 565 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 566 break; 567 } 568 569 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 570 if (modem_ctl[0] & 0x0008) { 571 dbg("%s - flow control = CRTSCTS", __func__); 572 cflag |= CRTSCTS; 573 } else { 574 dbg("%s - flow control = NONE", __func__); 575 cflag &= ~CRTSCTS; 576 } 577 578 *cflagp = cflag; 579 } 580 581 static void cp210x_set_termios(struct tty_struct *tty, 582 struct usb_serial_port *port, struct ktermios *old_termios) 583 { 584 unsigned int cflag, old_cflag; 585 unsigned int baud = 0, bits; 586 unsigned int modem_ctl[4]; 587 588 dbg("%s - port %d", __func__, port->number); 589 590 if (!tty) 591 return; 592 593 cflag = tty->termios->c_cflag; 594 old_cflag = old_termios->c_cflag; 595 baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty)); 596 597 /* If the baud rate is to be updated*/ 598 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) { 599 dbg("%s - Setting baud rate to %d baud", __func__, 600 baud); 601 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV, 602 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) { 603 dbg("Baud rate requested not supported by device"); 604 baud = tty_termios_baud_rate(old_termios); 605 } 606 } 607 /* Report back the resulting baud rate */ 608 tty_encode_baud_rate(tty, baud, baud); 609 610 /* If the number of data bits is to be updated */ 611 if ((cflag & CSIZE) != (old_cflag & CSIZE)) { 612 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 613 bits &= ~BITS_DATA_MASK; 614 switch (cflag & CSIZE) { 615 case CS5: 616 bits |= BITS_DATA_5; 617 dbg("%s - data bits = 5", __func__); 618 break; 619 case CS6: 620 bits |= BITS_DATA_6; 621 dbg("%s - data bits = 6", __func__); 622 break; 623 case CS7: 624 bits |= BITS_DATA_7; 625 dbg("%s - data bits = 7", __func__); 626 break; 627 case CS8: 628 bits |= BITS_DATA_8; 629 dbg("%s - data bits = 8", __func__); 630 break; 631 /*case CS9: 632 bits |= BITS_DATA_9; 633 dbg("%s - data bits = 9", __func__); 634 break;*/ 635 default: 636 dbg("cp210x driver does not " 637 "support the number of bits requested," 638 " using 8 bit mode\n"); 639 bits |= BITS_DATA_8; 640 break; 641 } 642 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 643 dbg("Number of data bits requested " 644 "not supported by device\n"); 645 } 646 647 if ((cflag & (PARENB|PARODD|CMSPAR)) != 648 (old_cflag & (PARENB|PARODD|CMSPAR))) { 649 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 650 bits &= ~BITS_PARITY_MASK; 651 if (cflag & PARENB) { 652 if (cflag & CMSPAR) { 653 if (cflag & PARODD) { 654 bits |= BITS_PARITY_MARK; 655 dbg("%s - parity = MARK", __func__); 656 } else { 657 bits |= BITS_PARITY_SPACE; 658 dbg("%s - parity = SPACE", __func__); 659 } 660 } else { 661 if (cflag & PARODD) { 662 bits |= BITS_PARITY_ODD; 663 dbg("%s - parity = ODD", __func__); 664 } else { 665 bits |= BITS_PARITY_EVEN; 666 dbg("%s - parity = EVEN", __func__); 667 } 668 } 669 } 670 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 671 dbg("Parity mode not supported " 672 "by device\n"); 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\n"); 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