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 *, struct usb_serial_port *, 37 struct file *); 38 static void cp210x_cleanup(struct usb_serial_port *); 39 static void cp210x_close(struct usb_serial_port *); 40 static void cp210x_get_termios(struct tty_struct *, 41 struct usb_serial_port *port); 42 static void cp210x_get_termios_port(struct usb_serial_port *port, 43 unsigned int *cflagp, unsigned int *baudp); 44 static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *, 45 struct ktermios*); 46 static int cp210x_tiocmget(struct tty_struct *, struct file *); 47 static int cp210x_tiocmset(struct tty_struct *, struct file *, 48 unsigned int, unsigned int); 49 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *, 50 unsigned int, unsigned int); 51 static void cp210x_break_ctl(struct tty_struct *, int); 52 static int cp210x_startup(struct usb_serial *); 53 static void cp210x_disconnect(struct usb_serial *); 54 55 static int debug; 56 57 static struct usb_device_id id_table [] = { 58 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */ 59 { USB_DEVICE(0x0489, 0xE000) }, /* 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(0x0FCF, 0x1003) }, /* Dynastream ANT development board */ 64 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */ 65 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */ 66 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */ 67 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */ 68 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */ 69 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */ 70 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */ 71 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */ 72 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */ 73 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */ 74 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */ 75 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */ 76 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */ 77 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */ 78 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */ 79 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */ 80 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */ 81 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */ 82 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */ 83 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */ 84 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */ 85 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */ 86 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */ 87 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */ 88 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */ 89 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */ 90 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */ 91 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */ 92 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */ 93 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */ 94 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */ 95 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */ 96 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */ 97 { USB_DEVICE(0x10c4, 0x8293) }, /* Telegesys ETRX2USB */ 98 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */ 99 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */ 100 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */ 101 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */ 102 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */ 103 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */ 104 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ 105 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ 106 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */ 107 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */ 108 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */ 109 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */ 110 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ 111 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */ 112 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ 113 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */ 114 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ 115 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ 116 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */ 117 { } /* Terminating Entry */ 118 }; 119 120 MODULE_DEVICE_TABLE(usb, id_table); 121 122 static struct usb_driver cp210x_driver = { 123 .name = "cp210x", 124 .probe = usb_serial_probe, 125 .disconnect = usb_serial_disconnect, 126 .id_table = id_table, 127 .no_dynamic_id = 1, 128 }; 129 130 static struct usb_serial_driver cp210x_device = { 131 .driver = { 132 .owner = THIS_MODULE, 133 .name = "cp210x", 134 }, 135 .usb_driver = &cp210x_driver, 136 .id_table = id_table, 137 .num_ports = 1, 138 .open = cp210x_open, 139 .close = cp210x_close, 140 .break_ctl = cp210x_break_ctl, 141 .set_termios = cp210x_set_termios, 142 .tiocmget = cp210x_tiocmget, 143 .tiocmset = cp210x_tiocmset, 144 .attach = cp210x_startup, 145 .disconnect = cp210x_disconnect, 146 }; 147 148 /* Config request types */ 149 #define REQTYPE_HOST_TO_DEVICE 0x41 150 #define REQTYPE_DEVICE_TO_HOST 0xc1 151 152 /* Config request codes */ 153 #define CP210X_IFC_ENABLE 0x00 154 #define CP210X_SET_BAUDDIV 0x01 155 #define CP210X_GET_BAUDDIV 0x02 156 #define CP210X_SET_LINE_CTL 0x03 157 #define CP210X_GET_LINE_CTL 0x04 158 #define CP210X_SET_BREAK 0x05 159 #define CP210X_IMM_CHAR 0x06 160 #define CP210X_SET_MHS 0x07 161 #define CP210X_GET_MDMSTS 0x08 162 #define CP210X_SET_XON 0x09 163 #define CP210X_SET_XOFF 0x0A 164 #define CP210X_SET_EVENTMASK 0x0B 165 #define CP210X_GET_EVENTMASK 0x0C 166 #define CP210X_SET_CHAR 0x0D 167 #define CP210X_GET_CHARS 0x0E 168 #define CP210X_GET_PROPS 0x0F 169 #define CP210X_GET_COMM_STATUS 0x10 170 #define CP210X_RESET 0x11 171 #define CP210X_PURGE 0x12 172 #define CP210X_SET_FLOW 0x13 173 #define CP210X_GET_FLOW 0x14 174 #define CP210X_EMBED_EVENTS 0x15 175 #define CP210X_GET_EVENTSTATE 0x16 176 #define CP210X_SET_CHARS 0x19 177 178 /* CP210X_IFC_ENABLE */ 179 #define UART_ENABLE 0x0001 180 #define UART_DISABLE 0x0000 181 182 /* CP210X_(SET|GET)_BAUDDIV */ 183 #define BAUD_RATE_GEN_FREQ 0x384000 184 185 /* CP210X_(SET|GET)_LINE_CTL */ 186 #define BITS_DATA_MASK 0X0f00 187 #define BITS_DATA_5 0X0500 188 #define BITS_DATA_6 0X0600 189 #define BITS_DATA_7 0X0700 190 #define BITS_DATA_8 0X0800 191 #define BITS_DATA_9 0X0900 192 193 #define BITS_PARITY_MASK 0x00f0 194 #define BITS_PARITY_NONE 0x0000 195 #define BITS_PARITY_ODD 0x0010 196 #define BITS_PARITY_EVEN 0x0020 197 #define BITS_PARITY_MARK 0x0030 198 #define BITS_PARITY_SPACE 0x0040 199 200 #define BITS_STOP_MASK 0x000f 201 #define BITS_STOP_1 0x0000 202 #define BITS_STOP_1_5 0x0001 203 #define BITS_STOP_2 0x0002 204 205 /* CP210X_SET_BREAK */ 206 #define BREAK_ON 0x0000 207 #define BREAK_OFF 0x0001 208 209 /* CP210X_(SET_MHS|GET_MDMSTS) */ 210 #define CONTROL_DTR 0x0001 211 #define CONTROL_RTS 0x0002 212 #define CONTROL_CTS 0x0010 213 #define CONTROL_DSR 0x0020 214 #define CONTROL_RING 0x0040 215 #define CONTROL_DCD 0x0080 216 #define CONTROL_WRITE_DTR 0x0100 217 #define CONTROL_WRITE_RTS 0x0200 218 219 /* 220 * cp210x_get_config 221 * Reads from the CP210x configuration registers 222 * 'size' is specified in bytes. 223 * 'data' is a pointer to a pre-allocated array of integers large 224 * enough to hold 'size' bytes (with 4 bytes to each integer) 225 */ 226 static int cp210x_get_config(struct usb_serial_port *port, u8 request, 227 unsigned int *data, int size) 228 { 229 struct usb_serial *serial = port->serial; 230 __le32 *buf; 231 int result, i, length; 232 233 /* Number of integers required to contain the array */ 234 length = (((size - 1) | 3) + 1)/4; 235 236 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL); 237 if (!buf) { 238 dev_err(&port->dev, "%s - out of memory.\n", __func__); 239 return -ENOMEM; 240 } 241 242 /* Issue the request, attempting to read 'size' bytes */ 243 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 244 request, REQTYPE_DEVICE_TO_HOST, 0x0000, 245 0, buf, size, 300); 246 247 /* Convert data into an array of integers */ 248 for (i = 0; i < length; i++) 249 data[i] = le32_to_cpu(buf[i]); 250 251 kfree(buf); 252 253 if (result != size) { 254 dbg("%s - Unable to send config request, " 255 "request=0x%x size=%d result=%d\n", 256 __func__, request, size, result); 257 return -EPROTO; 258 } 259 260 return 0; 261 } 262 263 /* 264 * cp210x_set_config 265 * Writes to the CP210x configuration registers 266 * Values less than 16 bits wide are sent directly 267 * 'size' is specified in bytes. 268 */ 269 static int cp210x_set_config(struct usb_serial_port *port, u8 request, 270 unsigned int *data, int size) 271 { 272 struct usb_serial *serial = port->serial; 273 __le32 *buf; 274 int result, i, length; 275 276 /* Number of integers required to contain the array */ 277 length = (((size - 1) | 3) + 1)/4; 278 279 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL); 280 if (!buf) { 281 dev_err(&port->dev, "%s - out of memory.\n", 282 __func__); 283 return -ENOMEM; 284 } 285 286 /* Array of integers into bytes */ 287 for (i = 0; i < length; i++) 288 buf[i] = cpu_to_le32(data[i]); 289 290 if (size > 2) { 291 result = usb_control_msg(serial->dev, 292 usb_sndctrlpipe(serial->dev, 0), 293 request, REQTYPE_HOST_TO_DEVICE, 0x0000, 294 0, buf, size, 300); 295 } else { 296 result = usb_control_msg(serial->dev, 297 usb_sndctrlpipe(serial->dev, 0), 298 request, REQTYPE_HOST_TO_DEVICE, data[0], 299 0, NULL, 0, 300); 300 } 301 302 kfree(buf); 303 304 if ((size > 2 && result != size) || result < 0) { 305 dbg("%s - Unable to send request, " 306 "request=0x%x size=%d result=%d\n", 307 __func__, request, size, result); 308 return -EPROTO; 309 } 310 311 /* Single data value */ 312 result = usb_control_msg(serial->dev, 313 usb_sndctrlpipe(serial->dev, 0), 314 request, REQTYPE_HOST_TO_DEVICE, data[0], 315 0, NULL, 0, 300); 316 return 0; 317 } 318 319 /* 320 * cp210x_set_config_single 321 * Convenience function for calling cp210x_set_config on single data values 322 * without requiring an integer pointer 323 */ 324 static inline int cp210x_set_config_single(struct usb_serial_port *port, 325 u8 request, unsigned int data) 326 { 327 return cp210x_set_config(port, request, &data, 2); 328 } 329 330 /* 331 * cp210x_quantise_baudrate 332 * Quantises the baud rate as per AN205 Table 1 333 */ 334 static unsigned int cp210x_quantise_baudrate(unsigned int baud) { 335 if (baud <= 56) baud = 0; 336 else if (baud <= 300) baud = 300; 337 else if (baud <= 600) baud = 600; 338 else if (baud <= 1200) baud = 1200; 339 else if (baud <= 1800) baud = 1800; 340 else if (baud <= 2400) baud = 2400; 341 else if (baud <= 4000) baud = 4000; 342 else if (baud <= 4803) baud = 4800; 343 else if (baud <= 7207) baud = 7200; 344 else if (baud <= 9612) baud = 9600; 345 else if (baud <= 14428) baud = 14400; 346 else if (baud <= 16062) baud = 16000; 347 else if (baud <= 19250) baud = 19200; 348 else if (baud <= 28912) baud = 28800; 349 else if (baud <= 38601) baud = 38400; 350 else if (baud <= 51558) baud = 51200; 351 else if (baud <= 56280) baud = 56000; 352 else if (baud <= 58053) baud = 57600; 353 else if (baud <= 64111) baud = 64000; 354 else if (baud <= 77608) baud = 76800; 355 else if (baud <= 117028) baud = 115200; 356 else if (baud <= 129347) baud = 128000; 357 else if (baud <= 156868) baud = 153600; 358 else if (baud <= 237832) baud = 230400; 359 else if (baud <= 254234) baud = 250000; 360 else if (baud <= 273066) baud = 256000; 361 else if (baud <= 491520) baud = 460800; 362 else if (baud <= 567138) baud = 500000; 363 else if (baud <= 670254) baud = 576000; 364 else if (baud <= 1053257) baud = 921600; 365 else if (baud <= 1474560) baud = 1228800; 366 else if (baud <= 2457600) baud = 1843200; 367 else baud = 3686400; 368 return baud; 369 } 370 371 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port, 372 struct file *filp) 373 { 374 struct usb_serial *serial = port->serial; 375 int result; 376 377 dbg("%s - port %d", __func__, port->number); 378 379 if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) { 380 dev_err(&port->dev, "%s - Unable to enable UART\n", 381 __func__); 382 return -EPROTO; 383 } 384 385 /* Start reading from the device */ 386 usb_fill_bulk_urb(port->read_urb, serial->dev, 387 usb_rcvbulkpipe(serial->dev, 388 port->bulk_in_endpointAddress), 389 port->read_urb->transfer_buffer, 390 port->read_urb->transfer_buffer_length, 391 serial->type->read_bulk_callback, 392 port); 393 result = usb_submit_urb(port->read_urb, GFP_KERNEL); 394 if (result) { 395 dev_err(&port->dev, "%s - failed resubmitting read urb, " 396 "error %d\n", __func__, result); 397 return result; 398 } 399 400 /* Configure the termios structure */ 401 cp210x_get_termios(tty, port); 402 403 /* Set the DTR and RTS pins low */ 404 cp210x_tiocmset_port(tty ? (struct usb_serial_port *) tty->driver_data 405 : port, 406 NULL, TIOCM_DTR | TIOCM_RTS, 0); 407 408 return 0; 409 } 410 411 static void cp210x_cleanup(struct usb_serial_port *port) 412 { 413 struct usb_serial *serial = port->serial; 414 415 dbg("%s - port %d", __func__, port->number); 416 417 if (serial->dev) { 418 /* shutdown any bulk reads that might be going on */ 419 if (serial->num_bulk_out) 420 usb_kill_urb(port->write_urb); 421 if (serial->num_bulk_in) 422 usb_kill_urb(port->read_urb); 423 } 424 } 425 426 static void cp210x_close(struct usb_serial_port *port) 427 { 428 dbg("%s - port %d", __func__, port->number); 429 430 /* shutdown our urbs */ 431 dbg("%s - shutting down urbs", __func__); 432 usb_kill_urb(port->write_urb); 433 usb_kill_urb(port->read_urb); 434 435 mutex_lock(&port->serial->disc_mutex); 436 if (!port->serial->disconnected) 437 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE); 438 mutex_unlock(&port->serial->disc_mutex); 439 } 440 441 /* 442 * cp210x_get_termios 443 * Reads the baud rate, data bits, parity, stop bits and flow control mode 444 * from the device, corrects any unsupported values, and configures the 445 * termios structure to reflect the state of the device 446 */ 447 static void cp210x_get_termios(struct tty_struct *tty, 448 struct usb_serial_port *port) 449 { 450 unsigned int baud; 451 452 if (tty) { 453 cp210x_get_termios_port(tty->driver_data, 454 &tty->termios->c_cflag, &baud); 455 tty_encode_baud_rate(tty, baud, baud); 456 } 457 458 else { 459 unsigned int cflag; 460 cflag = 0; 461 cp210x_get_termios_port(port, &cflag, &baud); 462 } 463 } 464 465 /* 466 * cp210x_get_termios_port 467 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port. 468 */ 469 static void cp210x_get_termios_port(struct usb_serial_port *port, 470 unsigned int *cflagp, unsigned int *baudp) 471 { 472 unsigned int cflag, modem_ctl[4]; 473 unsigned int baud; 474 unsigned int bits; 475 476 dbg("%s - port %d", __func__, port->number); 477 478 cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2); 479 /* Convert to baudrate */ 480 if (baud) 481 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud); 482 483 dbg("%s - baud rate = %d", __func__, baud); 484 *baudp = baud; 485 486 cflag = *cflagp; 487 488 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 489 cflag &= ~CSIZE; 490 switch (bits & BITS_DATA_MASK) { 491 case BITS_DATA_5: 492 dbg("%s - data bits = 5", __func__); 493 cflag |= CS5; 494 break; 495 case BITS_DATA_6: 496 dbg("%s - data bits = 6", __func__); 497 cflag |= CS6; 498 break; 499 case BITS_DATA_7: 500 dbg("%s - data bits = 7", __func__); 501 cflag |= CS7; 502 break; 503 case BITS_DATA_8: 504 dbg("%s - data bits = 8", __func__); 505 cflag |= CS8; 506 break; 507 case BITS_DATA_9: 508 dbg("%s - data bits = 9 (not supported, using 8 data bits)", 509 __func__); 510 cflag |= CS8; 511 bits &= ~BITS_DATA_MASK; 512 bits |= BITS_DATA_8; 513 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 514 break; 515 default: 516 dbg("%s - Unknown number of data bits, using 8", __func__); 517 cflag |= CS8; 518 bits &= ~BITS_DATA_MASK; 519 bits |= BITS_DATA_8; 520 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 521 break; 522 } 523 524 switch (bits & BITS_PARITY_MASK) { 525 case BITS_PARITY_NONE: 526 dbg("%s - parity = NONE", __func__); 527 cflag &= ~PARENB; 528 break; 529 case BITS_PARITY_ODD: 530 dbg("%s - parity = ODD", __func__); 531 cflag |= (PARENB|PARODD); 532 break; 533 case BITS_PARITY_EVEN: 534 dbg("%s - parity = EVEN", __func__); 535 cflag &= ~PARODD; 536 cflag |= PARENB; 537 break; 538 case BITS_PARITY_MARK: 539 dbg("%s - parity = MARK (not supported, disabling parity)", 540 __func__); 541 cflag &= ~PARENB; 542 bits &= ~BITS_PARITY_MASK; 543 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 544 break; 545 case BITS_PARITY_SPACE: 546 dbg("%s - parity = SPACE (not supported, disabling parity)", 547 __func__); 548 cflag &= ~PARENB; 549 bits &= ~BITS_PARITY_MASK; 550 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 551 break; 552 default: 553 dbg("%s - Unknown parity mode, disabling parity", __func__); 554 cflag &= ~PARENB; 555 bits &= ~BITS_PARITY_MASK; 556 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 557 break; 558 } 559 560 cflag &= ~CSTOPB; 561 switch (bits & BITS_STOP_MASK) { 562 case BITS_STOP_1: 563 dbg("%s - stop bits = 1", __func__); 564 break; 565 case BITS_STOP_1_5: 566 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)", 567 __func__); 568 bits &= ~BITS_STOP_MASK; 569 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 570 break; 571 case BITS_STOP_2: 572 dbg("%s - stop bits = 2", __func__); 573 cflag |= CSTOPB; 574 break; 575 default: 576 dbg("%s - Unknown number of stop bits, using 1 stop bit", 577 __func__); 578 bits &= ~BITS_STOP_MASK; 579 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 580 break; 581 } 582 583 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 584 if (modem_ctl[0] & 0x0008) { 585 dbg("%s - flow control = CRTSCTS", __func__); 586 cflag |= CRTSCTS; 587 } else { 588 dbg("%s - flow control = NONE", __func__); 589 cflag &= ~CRTSCTS; 590 } 591 592 *cflagp = cflag; 593 } 594 595 static void cp210x_set_termios(struct tty_struct *tty, 596 struct usb_serial_port *port, struct ktermios *old_termios) 597 { 598 unsigned int cflag, old_cflag; 599 unsigned int baud = 0, bits; 600 unsigned int modem_ctl[4]; 601 602 dbg("%s - port %d", __func__, port->number); 603 604 if (!tty) 605 return; 606 607 tty->termios->c_cflag &= ~CMSPAR; 608 cflag = tty->termios->c_cflag; 609 old_cflag = old_termios->c_cflag; 610 baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty)); 611 612 /* If the baud rate is to be updated*/ 613 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) { 614 dbg("%s - Setting baud rate to %d baud", __func__, 615 baud); 616 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV, 617 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) { 618 dbg("Baud rate requested not supported by device\n"); 619 baud = tty_termios_baud_rate(old_termios); 620 } 621 } 622 /* Report back the resulting baud rate */ 623 tty_encode_baud_rate(tty, baud, baud); 624 625 /* If the number of data bits is to be updated */ 626 if ((cflag & CSIZE) != (old_cflag & CSIZE)) { 627 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 628 bits &= ~BITS_DATA_MASK; 629 switch (cflag & CSIZE) { 630 case CS5: 631 bits |= BITS_DATA_5; 632 dbg("%s - data bits = 5", __func__); 633 break; 634 case CS6: 635 bits |= BITS_DATA_6; 636 dbg("%s - data bits = 6", __func__); 637 break; 638 case CS7: 639 bits |= BITS_DATA_7; 640 dbg("%s - data bits = 7", __func__); 641 break; 642 case CS8: 643 bits |= BITS_DATA_8; 644 dbg("%s - data bits = 8", __func__); 645 break; 646 /*case CS9: 647 bits |= BITS_DATA_9; 648 dbg("%s - data bits = 9", __func__); 649 break;*/ 650 default: 651 dbg("cp210x driver does not " 652 "support the number of bits requested," 653 " using 8 bit mode\n"); 654 bits |= BITS_DATA_8; 655 break; 656 } 657 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 658 dbg("Number of data bits requested " 659 "not supported by device\n"); 660 } 661 662 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) { 663 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 664 bits &= ~BITS_PARITY_MASK; 665 if (cflag & PARENB) { 666 if (cflag & PARODD) { 667 bits |= BITS_PARITY_ODD; 668 dbg("%s - parity = ODD", __func__); 669 } else { 670 bits |= BITS_PARITY_EVEN; 671 dbg("%s - parity = EVEN", __func__); 672 } 673 } 674 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 675 dbg("Parity mode not supported " 676 "by device\n"); 677 } 678 679 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { 680 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 681 bits &= ~BITS_STOP_MASK; 682 if (cflag & CSTOPB) { 683 bits |= BITS_STOP_2; 684 dbg("%s - stop bits = 2", __func__); 685 } else { 686 bits |= BITS_STOP_1; 687 dbg("%s - stop bits = 1", __func__); 688 } 689 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 690 dbg("Number of stop bits requested " 691 "not supported by device\n"); 692 } 693 694 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { 695 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 696 dbg("%s - read 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]); 699 700 if (cflag & CRTSCTS) { 701 modem_ctl[0] &= ~0x7B; 702 modem_ctl[0] |= 0x09; 703 modem_ctl[1] = 0x80; 704 dbg("%s - flow control = CRTSCTS", __func__); 705 } else { 706 modem_ctl[0] &= ~0x7B; 707 modem_ctl[0] |= 0x01; 708 modem_ctl[1] |= 0x40; 709 dbg("%s - flow control = NONE", __func__); 710 } 711 712 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", 713 __func__, modem_ctl[0], modem_ctl[1], 714 modem_ctl[2], modem_ctl[3]); 715 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16); 716 } 717 718 } 719 720 static int cp210x_tiocmset (struct tty_struct *tty, struct file *file, 721 unsigned int set, unsigned int clear) 722 { 723 struct usb_serial_port *port = tty->driver_data; 724 return cp210x_tiocmset_port(port, file, set, clear); 725 } 726 727 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *file, 728 unsigned int set, unsigned int clear) 729 { 730 unsigned int control = 0; 731 732 dbg("%s - port %d", __func__, port->number); 733 734 if (set & TIOCM_RTS) { 735 control |= CONTROL_RTS; 736 control |= CONTROL_WRITE_RTS; 737 } 738 if (set & TIOCM_DTR) { 739 control |= CONTROL_DTR; 740 control |= CONTROL_WRITE_DTR; 741 } 742 if (clear & TIOCM_RTS) { 743 control &= ~CONTROL_RTS; 744 control |= CONTROL_WRITE_RTS; 745 } 746 if (clear & TIOCM_DTR) { 747 control &= ~CONTROL_DTR; 748 control |= CONTROL_WRITE_DTR; 749 } 750 751 dbg("%s - control = 0x%.4x", __func__, control); 752 753 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2); 754 } 755 756 static int cp210x_tiocmget (struct tty_struct *tty, struct file *file) 757 { 758 struct usb_serial_port *port = tty->driver_data; 759 unsigned int control; 760 int result; 761 762 dbg("%s - port %d", __func__, port->number); 763 764 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1); 765 766 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) 767 |((control & CONTROL_RTS) ? TIOCM_RTS : 0) 768 |((control & CONTROL_CTS) ? TIOCM_CTS : 0) 769 |((control & CONTROL_DSR) ? TIOCM_DSR : 0) 770 |((control & CONTROL_RING)? TIOCM_RI : 0) 771 |((control & CONTROL_DCD) ? TIOCM_CD : 0); 772 773 dbg("%s - control = 0x%.2x", __func__, control); 774 775 return result; 776 } 777 778 static void cp210x_break_ctl (struct tty_struct *tty, int break_state) 779 { 780 struct usb_serial_port *port = tty->driver_data; 781 unsigned int state; 782 783 dbg("%s - port %d", __func__, port->number); 784 if (break_state == 0) 785 state = BREAK_OFF; 786 else 787 state = BREAK_ON; 788 dbg("%s - turning break %s", __func__, 789 state == BREAK_OFF ? "off" : "on"); 790 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2); 791 } 792 793 static int cp210x_startup(struct usb_serial *serial) 794 { 795 /* cp210x buffers behave strangely unless device is reset */ 796 usb_reset_device(serial->dev); 797 return 0; 798 } 799 800 static void cp210x_disconnect(struct usb_serial *serial) 801 { 802 int i; 803 804 dbg("%s", __func__); 805 806 /* Stop reads and writes on all ports */ 807 for (i = 0; i < serial->num_ports; ++i) 808 cp210x_cleanup(serial->port[i]); 809 } 810 811 static int __init cp210x_init(void) 812 { 813 int retval; 814 815 retval = usb_serial_register(&cp210x_device); 816 if (retval) 817 return retval; /* Failed to register */ 818 819 retval = usb_register(&cp210x_driver); 820 if (retval) { 821 /* Failed to register */ 822 usb_serial_deregister(&cp210x_device); 823 return retval; 824 } 825 826 /* Success */ 827 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 828 DRIVER_DESC "\n"); 829 return 0; 830 } 831 832 static void __exit cp210x_exit(void) 833 { 834 usb_deregister(&cp210x_driver); 835 usb_serial_deregister(&cp210x_device); 836 } 837 838 module_init(cp210x_init); 839 module_exit(cp210x_exit); 840 841 MODULE_DESCRIPTION(DRIVER_DESC); 842 MODULE_VERSION(DRIVER_VERSION); 843 MODULE_LICENSE("GPL"); 844 845 module_param(debug, bool, S_IRUGO | S_IWUSR); 846 MODULE_PARM_DESC(debug, "Enable verbose debugging messages"); 847