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(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */ 60 { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */ 61 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */ 62 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */ 63 { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */ 64 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */ 65 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */ 66 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */ 67 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */ 68 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */ 69 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */ 70 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */ 71 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */ 72 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */ 73 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */ 74 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */ 75 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */ 76 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */ 77 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */ 78 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */ 79 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */ 80 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */ 81 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */ 82 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */ 83 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */ 84 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */ 85 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */ 86 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */ 87 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */ 88 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */ 89 { USB_DEVICE(0x10C4, 0x8149) }, /* West Mountain Radio Computerized Battery Analyzer */ 90 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */ 91 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */ 92 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */ 93 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */ 94 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */ 95 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */ 96 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */ 97 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */ 98 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */ 99 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */ 100 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */ 101 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */ 102 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */ 103 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */ 104 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */ 105 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */ 106 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */ 107 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesys ETRX2USB */ 108 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */ 109 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */ 110 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */ 111 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */ 112 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */ 113 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */ 114 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */ 115 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ 116 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ 117 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */ 118 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */ 119 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */ 120 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */ 121 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */ 122 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ 123 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */ 124 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ 125 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */ 126 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ 127 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ 128 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */ 129 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */ 130 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */ 131 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */ 132 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */ 133 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */ 134 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */ 135 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */ 136 { } /* Terminating Entry */ 137 }; 138 139 MODULE_DEVICE_TABLE(usb, id_table); 140 141 static struct usb_driver cp210x_driver = { 142 .name = "cp210x", 143 .probe = usb_serial_probe, 144 .disconnect = usb_serial_disconnect, 145 .id_table = id_table, 146 .no_dynamic_id = 1, 147 }; 148 149 static struct usb_serial_driver cp210x_device = { 150 .driver = { 151 .owner = THIS_MODULE, 152 .name = "cp210x", 153 }, 154 .usb_driver = &cp210x_driver, 155 .id_table = id_table, 156 .num_ports = 1, 157 .bulk_in_size = 256, 158 .bulk_out_size = 256, 159 .open = cp210x_open, 160 .close = cp210x_close, 161 .break_ctl = cp210x_break_ctl, 162 .set_termios = cp210x_set_termios, 163 .tiocmget = cp210x_tiocmget, 164 .tiocmset = cp210x_tiocmset, 165 .attach = cp210x_startup, 166 .dtr_rts = cp210x_dtr_rts, 167 .carrier_raised = cp210x_carrier_raised 168 }; 169 170 /* Config request types */ 171 #define REQTYPE_HOST_TO_DEVICE 0x41 172 #define REQTYPE_DEVICE_TO_HOST 0xc1 173 174 /* Config request codes */ 175 #define CP210X_IFC_ENABLE 0x00 176 #define CP210X_SET_BAUDDIV 0x01 177 #define CP210X_GET_BAUDDIV 0x02 178 #define CP210X_SET_LINE_CTL 0x03 179 #define CP210X_GET_LINE_CTL 0x04 180 #define CP210X_SET_BREAK 0x05 181 #define CP210X_IMM_CHAR 0x06 182 #define CP210X_SET_MHS 0x07 183 #define CP210X_GET_MDMSTS 0x08 184 #define CP210X_SET_XON 0x09 185 #define CP210X_SET_XOFF 0x0A 186 #define CP210X_SET_EVENTMASK 0x0B 187 #define CP210X_GET_EVENTMASK 0x0C 188 #define CP210X_SET_CHAR 0x0D 189 #define CP210X_GET_CHARS 0x0E 190 #define CP210X_GET_PROPS 0x0F 191 #define CP210X_GET_COMM_STATUS 0x10 192 #define CP210X_RESET 0x11 193 #define CP210X_PURGE 0x12 194 #define CP210X_SET_FLOW 0x13 195 #define CP210X_GET_FLOW 0x14 196 #define CP210X_EMBED_EVENTS 0x15 197 #define CP210X_GET_EVENTSTATE 0x16 198 #define CP210X_SET_CHARS 0x19 199 200 /* CP210X_IFC_ENABLE */ 201 #define UART_ENABLE 0x0001 202 #define UART_DISABLE 0x0000 203 204 /* CP210X_(SET|GET)_BAUDDIV */ 205 #define BAUD_RATE_GEN_FREQ 0x384000 206 207 /* CP210X_(SET|GET)_LINE_CTL */ 208 #define BITS_DATA_MASK 0X0f00 209 #define BITS_DATA_5 0X0500 210 #define BITS_DATA_6 0X0600 211 #define BITS_DATA_7 0X0700 212 #define BITS_DATA_8 0X0800 213 #define BITS_DATA_9 0X0900 214 215 #define BITS_PARITY_MASK 0x00f0 216 #define BITS_PARITY_NONE 0x0000 217 #define BITS_PARITY_ODD 0x0010 218 #define BITS_PARITY_EVEN 0x0020 219 #define BITS_PARITY_MARK 0x0030 220 #define BITS_PARITY_SPACE 0x0040 221 222 #define BITS_STOP_MASK 0x000f 223 #define BITS_STOP_1 0x0000 224 #define BITS_STOP_1_5 0x0001 225 #define BITS_STOP_2 0x0002 226 227 /* CP210X_SET_BREAK */ 228 #define BREAK_ON 0x0001 229 #define BREAK_OFF 0x0000 230 231 /* CP210X_(SET_MHS|GET_MDMSTS) */ 232 #define CONTROL_DTR 0x0001 233 #define CONTROL_RTS 0x0002 234 #define CONTROL_CTS 0x0010 235 #define CONTROL_DSR 0x0020 236 #define CONTROL_RING 0x0040 237 #define CONTROL_DCD 0x0080 238 #define CONTROL_WRITE_DTR 0x0100 239 #define CONTROL_WRITE_RTS 0x0200 240 241 /* 242 * cp210x_get_config 243 * Reads from the CP210x configuration registers 244 * 'size' is specified in bytes. 245 * 'data' is a pointer to a pre-allocated array of integers large 246 * enough to hold 'size' bytes (with 4 bytes to each integer) 247 */ 248 static int cp210x_get_config(struct usb_serial_port *port, u8 request, 249 unsigned int *data, int size) 250 { 251 struct usb_serial *serial = port->serial; 252 __le32 *buf; 253 int result, i, length; 254 255 /* Number of integers required to contain the array */ 256 length = (((size - 1) | 3) + 1)/4; 257 258 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL); 259 if (!buf) { 260 dev_err(&port->dev, "%s - out of memory.\n", __func__); 261 return -ENOMEM; 262 } 263 264 /* Issue the request, attempting to read 'size' bytes */ 265 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 266 request, REQTYPE_DEVICE_TO_HOST, 0x0000, 267 0, buf, size, 300); 268 269 /* Convert data into an array of integers */ 270 for (i = 0; i < length; i++) 271 data[i] = le32_to_cpu(buf[i]); 272 273 kfree(buf); 274 275 if (result != size) { 276 dbg("%s - Unable to send config request, " 277 "request=0x%x size=%d result=%d\n", 278 __func__, request, size, result); 279 return -EPROTO; 280 } 281 282 return 0; 283 } 284 285 /* 286 * cp210x_set_config 287 * Writes to the CP210x configuration registers 288 * Values less than 16 bits wide are sent directly 289 * 'size' is specified in bytes. 290 */ 291 static int cp210x_set_config(struct usb_serial_port *port, u8 request, 292 unsigned int *data, int size) 293 { 294 struct usb_serial *serial = port->serial; 295 __le32 *buf; 296 int result, i, length; 297 298 /* Number of integers required to contain the array */ 299 length = (((size - 1) | 3) + 1)/4; 300 301 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL); 302 if (!buf) { 303 dev_err(&port->dev, "%s - out of memory.\n", 304 __func__); 305 return -ENOMEM; 306 } 307 308 /* Array of integers into bytes */ 309 for (i = 0; i < length; i++) 310 buf[i] = cpu_to_le32(data[i]); 311 312 if (size > 2) { 313 result = usb_control_msg(serial->dev, 314 usb_sndctrlpipe(serial->dev, 0), 315 request, REQTYPE_HOST_TO_DEVICE, 0x0000, 316 0, buf, size, 300); 317 } else { 318 result = usb_control_msg(serial->dev, 319 usb_sndctrlpipe(serial->dev, 0), 320 request, REQTYPE_HOST_TO_DEVICE, data[0], 321 0, NULL, 0, 300); 322 } 323 324 kfree(buf); 325 326 if ((size > 2 && result != size) || result < 0) { 327 dbg("%s - Unable to send request, " 328 "request=0x%x size=%d result=%d\n", 329 __func__, request, size, result); 330 return -EPROTO; 331 } 332 333 return 0; 334 } 335 336 /* 337 * cp210x_set_config_single 338 * Convenience function for calling cp210x_set_config on single data values 339 * without requiring an integer pointer 340 */ 341 static inline int cp210x_set_config_single(struct usb_serial_port *port, 342 u8 request, unsigned int data) 343 { 344 return cp210x_set_config(port, request, &data, 2); 345 } 346 347 /* 348 * cp210x_quantise_baudrate 349 * Quantises the baud rate as per AN205 Table 1 350 */ 351 static unsigned int cp210x_quantise_baudrate(unsigned int baud) { 352 if (baud <= 56) baud = 0; 353 else if (baud <= 300) baud = 300; 354 else if (baud <= 600) baud = 600; 355 else if (baud <= 1200) baud = 1200; 356 else if (baud <= 1800) baud = 1800; 357 else if (baud <= 2400) baud = 2400; 358 else if (baud <= 4000) baud = 4000; 359 else if (baud <= 4803) baud = 4800; 360 else if (baud <= 7207) baud = 7200; 361 else if (baud <= 9612) baud = 9600; 362 else if (baud <= 14428) baud = 14400; 363 else if (baud <= 16062) baud = 16000; 364 else if (baud <= 19250) baud = 19200; 365 else if (baud <= 28912) baud = 28800; 366 else if (baud <= 38601) baud = 38400; 367 else if (baud <= 51558) baud = 51200; 368 else if (baud <= 56280) baud = 56000; 369 else if (baud <= 58053) baud = 57600; 370 else if (baud <= 64111) baud = 64000; 371 else if (baud <= 77608) baud = 76800; 372 else if (baud <= 117028) baud = 115200; 373 else if (baud <= 129347) baud = 128000; 374 else if (baud <= 156868) baud = 153600; 375 else if (baud <= 237832) baud = 230400; 376 else if (baud <= 254234) baud = 250000; 377 else if (baud <= 273066) baud = 256000; 378 else if (baud <= 491520) baud = 460800; 379 else if (baud <= 567138) baud = 500000; 380 else if (baud <= 670254) baud = 576000; 381 else if (baud <= 1053257) baud = 921600; 382 else if (baud <= 1474560) baud = 1228800; 383 else if (baud <= 2457600) baud = 1843200; 384 else baud = 3686400; 385 return baud; 386 } 387 388 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port) 389 { 390 int result; 391 392 dbg("%s - port %d", __func__, port->number); 393 394 if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) { 395 dev_err(&port->dev, "%s - Unable to enable UART\n", 396 __func__); 397 return -EPROTO; 398 } 399 400 result = usb_serial_generic_open(tty, port); 401 if (result) 402 return result; 403 404 /* Configure the termios structure */ 405 cp210x_get_termios(tty, port); 406 return 0; 407 } 408 409 static void cp210x_close(struct usb_serial_port *port) 410 { 411 dbg("%s - port %d", __func__, port->number); 412 413 usb_serial_generic_close(port); 414 415 mutex_lock(&port->serial->disc_mutex); 416 if (!port->serial->disconnected) 417 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE); 418 mutex_unlock(&port->serial->disc_mutex); 419 } 420 421 /* 422 * cp210x_get_termios 423 * Reads the baud rate, data bits, parity, stop bits and flow control mode 424 * from the device, corrects any unsupported values, and configures the 425 * termios structure to reflect the state of the device 426 */ 427 static void cp210x_get_termios(struct tty_struct *tty, 428 struct usb_serial_port *port) 429 { 430 unsigned int baud; 431 432 if (tty) { 433 cp210x_get_termios_port(tty->driver_data, 434 &tty->termios->c_cflag, &baud); 435 tty_encode_baud_rate(tty, baud, baud); 436 } 437 438 else { 439 unsigned int cflag; 440 cflag = 0; 441 cp210x_get_termios_port(port, &cflag, &baud); 442 } 443 } 444 445 /* 446 * cp210x_get_termios_port 447 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port. 448 */ 449 static void cp210x_get_termios_port(struct usb_serial_port *port, 450 unsigned int *cflagp, unsigned int *baudp) 451 { 452 unsigned int cflag, modem_ctl[4]; 453 unsigned int baud; 454 unsigned int bits; 455 456 dbg("%s - port %d", __func__, port->number); 457 458 cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2); 459 /* Convert to baudrate */ 460 if (baud) 461 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud); 462 463 dbg("%s - baud rate = %d", __func__, baud); 464 *baudp = baud; 465 466 cflag = *cflagp; 467 468 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 469 cflag &= ~CSIZE; 470 switch (bits & BITS_DATA_MASK) { 471 case BITS_DATA_5: 472 dbg("%s - data bits = 5", __func__); 473 cflag |= CS5; 474 break; 475 case BITS_DATA_6: 476 dbg("%s - data bits = 6", __func__); 477 cflag |= CS6; 478 break; 479 case BITS_DATA_7: 480 dbg("%s - data bits = 7", __func__); 481 cflag |= CS7; 482 break; 483 case BITS_DATA_8: 484 dbg("%s - data bits = 8", __func__); 485 cflag |= CS8; 486 break; 487 case BITS_DATA_9: 488 dbg("%s - data bits = 9 (not supported, using 8 data bits)", 489 __func__); 490 cflag |= CS8; 491 bits &= ~BITS_DATA_MASK; 492 bits |= BITS_DATA_8; 493 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 494 break; 495 default: 496 dbg("%s - Unknown number of data bits, using 8", __func__); 497 cflag |= CS8; 498 bits &= ~BITS_DATA_MASK; 499 bits |= BITS_DATA_8; 500 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 501 break; 502 } 503 504 switch (bits & BITS_PARITY_MASK) { 505 case BITS_PARITY_NONE: 506 dbg("%s - parity = NONE", __func__); 507 cflag &= ~PARENB; 508 break; 509 case BITS_PARITY_ODD: 510 dbg("%s - parity = ODD", __func__); 511 cflag |= (PARENB|PARODD); 512 break; 513 case BITS_PARITY_EVEN: 514 dbg("%s - parity = EVEN", __func__); 515 cflag &= ~PARODD; 516 cflag |= PARENB; 517 break; 518 case BITS_PARITY_MARK: 519 dbg("%s - parity = MARK (not supported, disabling parity)", 520 __func__); 521 cflag &= ~PARENB; 522 bits &= ~BITS_PARITY_MASK; 523 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 524 break; 525 case BITS_PARITY_SPACE: 526 dbg("%s - parity = SPACE (not supported, disabling parity)", 527 __func__); 528 cflag &= ~PARENB; 529 bits &= ~BITS_PARITY_MASK; 530 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 531 break; 532 default: 533 dbg("%s - Unknown parity mode, disabling parity", __func__); 534 cflag &= ~PARENB; 535 bits &= ~BITS_PARITY_MASK; 536 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 537 break; 538 } 539 540 cflag &= ~CSTOPB; 541 switch (bits & BITS_STOP_MASK) { 542 case BITS_STOP_1: 543 dbg("%s - stop bits = 1", __func__); 544 break; 545 case BITS_STOP_1_5: 546 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)", 547 __func__); 548 bits &= ~BITS_STOP_MASK; 549 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 550 break; 551 case BITS_STOP_2: 552 dbg("%s - stop bits = 2", __func__); 553 cflag |= CSTOPB; 554 break; 555 default: 556 dbg("%s - Unknown number of stop bits, using 1 stop bit", 557 __func__); 558 bits &= ~BITS_STOP_MASK; 559 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 560 break; 561 } 562 563 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 564 if (modem_ctl[0] & 0x0008) { 565 dbg("%s - flow control = CRTSCTS", __func__); 566 cflag |= CRTSCTS; 567 } else { 568 dbg("%s - flow control = NONE", __func__); 569 cflag &= ~CRTSCTS; 570 } 571 572 *cflagp = cflag; 573 } 574 575 static void cp210x_set_termios(struct tty_struct *tty, 576 struct usb_serial_port *port, struct ktermios *old_termios) 577 { 578 unsigned int cflag, old_cflag; 579 unsigned int baud = 0, bits; 580 unsigned int modem_ctl[4]; 581 582 dbg("%s - port %d", __func__, port->number); 583 584 if (!tty) 585 return; 586 587 tty->termios->c_cflag &= ~CMSPAR; 588 cflag = tty->termios->c_cflag; 589 old_cflag = old_termios->c_cflag; 590 baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty)); 591 592 /* If the baud rate is to be updated*/ 593 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) { 594 dbg("%s - Setting baud rate to %d baud", __func__, 595 baud); 596 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV, 597 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) { 598 dbg("Baud rate requested not supported by device"); 599 baud = tty_termios_baud_rate(old_termios); 600 } 601 } 602 /* Report back the resulting baud rate */ 603 tty_encode_baud_rate(tty, baud, baud); 604 605 /* If the number of data bits is to be updated */ 606 if ((cflag & CSIZE) != (old_cflag & CSIZE)) { 607 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 608 bits &= ~BITS_DATA_MASK; 609 switch (cflag & CSIZE) { 610 case CS5: 611 bits |= BITS_DATA_5; 612 dbg("%s - data bits = 5", __func__); 613 break; 614 case CS6: 615 bits |= BITS_DATA_6; 616 dbg("%s - data bits = 6", __func__); 617 break; 618 case CS7: 619 bits |= BITS_DATA_7; 620 dbg("%s - data bits = 7", __func__); 621 break; 622 case CS8: 623 bits |= BITS_DATA_8; 624 dbg("%s - data bits = 8", __func__); 625 break; 626 /*case CS9: 627 bits |= BITS_DATA_9; 628 dbg("%s - data bits = 9", __func__); 629 break;*/ 630 default: 631 dbg("cp210x driver does not " 632 "support the number of bits requested," 633 " using 8 bit mode\n"); 634 bits |= BITS_DATA_8; 635 break; 636 } 637 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 638 dbg("Number of data bits requested " 639 "not supported by device\n"); 640 } 641 642 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) { 643 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 644 bits &= ~BITS_PARITY_MASK; 645 if (cflag & PARENB) { 646 if (cflag & PARODD) { 647 bits |= BITS_PARITY_ODD; 648 dbg("%s - parity = ODD", __func__); 649 } else { 650 bits |= BITS_PARITY_EVEN; 651 dbg("%s - parity = EVEN", __func__); 652 } 653 } 654 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 655 dbg("Parity mode not supported " 656 "by device\n"); 657 } 658 659 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { 660 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 661 bits &= ~BITS_STOP_MASK; 662 if (cflag & CSTOPB) { 663 bits |= BITS_STOP_2; 664 dbg("%s - stop bits = 2", __func__); 665 } else { 666 bits |= BITS_STOP_1; 667 dbg("%s - stop bits = 1", __func__); 668 } 669 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 670 dbg("Number of stop bits requested " 671 "not supported by device\n"); 672 } 673 674 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { 675 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 676 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", 677 __func__, modem_ctl[0], modem_ctl[1], 678 modem_ctl[2], modem_ctl[3]); 679 680 if (cflag & CRTSCTS) { 681 modem_ctl[0] &= ~0x7B; 682 modem_ctl[0] |= 0x09; 683 modem_ctl[1] = 0x80; 684 dbg("%s - flow control = CRTSCTS", __func__); 685 } else { 686 modem_ctl[0] &= ~0x7B; 687 modem_ctl[0] |= 0x01; 688 modem_ctl[1] |= 0x40; 689 dbg("%s - flow control = NONE", __func__); 690 } 691 692 dbg("%s - write 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 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16); 696 } 697 698 } 699 700 static int cp210x_tiocmset (struct tty_struct *tty, struct file *file, 701 unsigned int set, unsigned int clear) 702 { 703 struct usb_serial_port *port = tty->driver_data; 704 return cp210x_tiocmset_port(port, file, set, clear); 705 } 706 707 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *file, 708 unsigned int set, unsigned int clear) 709 { 710 unsigned int control = 0; 711 712 dbg("%s - port %d", __func__, port->number); 713 714 if (set & TIOCM_RTS) { 715 control |= CONTROL_RTS; 716 control |= CONTROL_WRITE_RTS; 717 } 718 if (set & TIOCM_DTR) { 719 control |= CONTROL_DTR; 720 control |= CONTROL_WRITE_DTR; 721 } 722 if (clear & TIOCM_RTS) { 723 control &= ~CONTROL_RTS; 724 control |= CONTROL_WRITE_RTS; 725 } 726 if (clear & TIOCM_DTR) { 727 control &= ~CONTROL_DTR; 728 control |= CONTROL_WRITE_DTR; 729 } 730 731 dbg("%s - control = 0x%.4x", __func__, control); 732 733 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2); 734 } 735 736 static void cp210x_dtr_rts(struct usb_serial_port *p, int on) 737 { 738 if (on) 739 cp210x_tiocmset_port(p, NULL, TIOCM_DTR|TIOCM_RTS, 0); 740 else 741 cp210x_tiocmset_port(p, NULL, 0, TIOCM_DTR|TIOCM_RTS); 742 } 743 744 static int cp210x_tiocmget (struct tty_struct *tty, struct file *file) 745 { 746 struct usb_serial_port *port = tty->driver_data; 747 unsigned int control; 748 int result; 749 750 dbg("%s - port %d", __func__, port->number); 751 752 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1); 753 754 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) 755 |((control & CONTROL_RTS) ? TIOCM_RTS : 0) 756 |((control & CONTROL_CTS) ? TIOCM_CTS : 0) 757 |((control & CONTROL_DSR) ? TIOCM_DSR : 0) 758 |((control & CONTROL_RING)? TIOCM_RI : 0) 759 |((control & CONTROL_DCD) ? TIOCM_CD : 0); 760 761 dbg("%s - control = 0x%.2x", __func__, control); 762 763 return result; 764 } 765 766 static int cp210x_carrier_raised(struct usb_serial_port *p) 767 { 768 unsigned int control; 769 cp210x_get_config(p, CP210X_GET_MDMSTS, &control, 1); 770 if (control & CONTROL_DCD) 771 return 1; 772 return 0; 773 } 774 775 static void cp210x_break_ctl (struct tty_struct *tty, int break_state) 776 { 777 struct usb_serial_port *port = tty->driver_data; 778 unsigned int state; 779 780 dbg("%s - port %d", __func__, port->number); 781 if (break_state == 0) 782 state = BREAK_OFF; 783 else 784 state = BREAK_ON; 785 dbg("%s - turning break %s", __func__, 786 state == BREAK_OFF ? "off" : "on"); 787 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2); 788 } 789 790 static int cp210x_startup(struct usb_serial *serial) 791 { 792 /* cp210x buffers behave strangely unless device is reset */ 793 usb_reset_device(serial->dev); 794 return 0; 795 } 796 797 static int __init cp210x_init(void) 798 { 799 int retval; 800 801 retval = usb_serial_register(&cp210x_device); 802 if (retval) 803 return retval; /* Failed to register */ 804 805 retval = usb_register(&cp210x_driver); 806 if (retval) { 807 /* Failed to register */ 808 usb_serial_deregister(&cp210x_device); 809 return retval; 810 } 811 812 /* Success */ 813 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 814 DRIVER_DESC "\n"); 815 return 0; 816 } 817 818 static void __exit cp210x_exit(void) 819 { 820 usb_deregister(&cp210x_driver); 821 usb_serial_deregister(&cp210x_device); 822 } 823 824 module_init(cp210x_init); 825 module_exit(cp210x_exit); 826 827 MODULE_DESCRIPTION(DRIVER_DESC); 828 MODULE_VERSION(DRIVER_VERSION); 829 MODULE_LICENSE("GPL"); 830 831 module_param(debug, bool, S_IRUGO | S_IWUSR); 832 MODULE_PARM_DESC(debug, "Enable verbose debugging messages"); 833