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, 0x814A) }, /* West Mountain Radio RIGblaster P&P */ 84 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */ 85 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */ 86 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */ 87 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */ 88 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */ 89 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */ 90 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */ 91 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */ 92 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */ 93 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */ 94 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */ 95 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */ 96 { USB_DEVICE(0x10c4, 0x8293) }, /* Telegesys ETRX2USB */ 97 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */ 98 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */ 99 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */ 100 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */ 101 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ 102 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ 103 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */ 104 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */ 105 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */ 106 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */ 107 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ 108 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */ 109 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ 110 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */ 111 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ 112 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ 113 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */ 114 { } /* Terminating Entry */ 115 }; 116 117 MODULE_DEVICE_TABLE(usb, id_table); 118 119 static struct usb_driver cp210x_driver = { 120 .name = "cp210x", 121 .probe = usb_serial_probe, 122 .disconnect = usb_serial_disconnect, 123 .id_table = id_table, 124 .no_dynamic_id = 1, 125 }; 126 127 static struct usb_serial_driver cp210x_device = { 128 .driver = { 129 .owner = THIS_MODULE, 130 .name = "cp210x", 131 }, 132 .usb_driver = &cp210x_driver, 133 .id_table = id_table, 134 .num_ports = 1, 135 .open = cp210x_open, 136 .close = cp210x_close, 137 .break_ctl = cp210x_break_ctl, 138 .set_termios = cp210x_set_termios, 139 .tiocmget = cp210x_tiocmget, 140 .tiocmset = cp210x_tiocmset, 141 .attach = cp210x_startup, 142 .disconnect = cp210x_disconnect, 143 }; 144 145 /* Config request types */ 146 #define REQTYPE_HOST_TO_DEVICE 0x41 147 #define REQTYPE_DEVICE_TO_HOST 0xc1 148 149 /* Config request codes */ 150 #define CP210X_IFC_ENABLE 0x00 151 #define CP210X_SET_BAUDDIV 0x01 152 #define CP210X_GET_BAUDDIV 0x02 153 #define CP210X_SET_LINE_CTL 0x03 154 #define CP210X_GET_LINE_CTL 0x04 155 #define CP210X_SET_BREAK 0x05 156 #define CP210X_IMM_CHAR 0x06 157 #define CP210X_SET_MHS 0x07 158 #define CP210X_GET_MDMSTS 0x08 159 #define CP210X_SET_XON 0x09 160 #define CP210X_SET_XOFF 0x0A 161 #define CP210X_SET_EVENTMASK 0x0B 162 #define CP210X_GET_EVENTMASK 0x0C 163 #define CP210X_SET_CHAR 0x0D 164 #define CP210X_GET_CHARS 0x0E 165 #define CP210X_GET_PROPS 0x0F 166 #define CP210X_GET_COMM_STATUS 0x10 167 #define CP210X_RESET 0x11 168 #define CP210X_PURGE 0x12 169 #define CP210X_SET_FLOW 0x13 170 #define CP210X_GET_FLOW 0x14 171 #define CP210X_EMBED_EVENTS 0x15 172 #define CP210X_GET_EVENTSTATE 0x16 173 #define CP210X_SET_CHARS 0x19 174 175 /* CP210X_IFC_ENABLE */ 176 #define UART_ENABLE 0x0001 177 #define UART_DISABLE 0x0000 178 179 /* CP210X_(SET|GET)_BAUDDIV */ 180 #define BAUD_RATE_GEN_FREQ 0x384000 181 182 /* CP210X_(SET|GET)_LINE_CTL */ 183 #define BITS_DATA_MASK 0X0f00 184 #define BITS_DATA_5 0X0500 185 #define BITS_DATA_6 0X0600 186 #define BITS_DATA_7 0X0700 187 #define BITS_DATA_8 0X0800 188 #define BITS_DATA_9 0X0900 189 190 #define BITS_PARITY_MASK 0x00f0 191 #define BITS_PARITY_NONE 0x0000 192 #define BITS_PARITY_ODD 0x0010 193 #define BITS_PARITY_EVEN 0x0020 194 #define BITS_PARITY_MARK 0x0030 195 #define BITS_PARITY_SPACE 0x0040 196 197 #define BITS_STOP_MASK 0x000f 198 #define BITS_STOP_1 0x0000 199 #define BITS_STOP_1_5 0x0001 200 #define BITS_STOP_2 0x0002 201 202 /* CP210X_SET_BREAK */ 203 #define BREAK_ON 0x0000 204 #define BREAK_OFF 0x0001 205 206 /* CP210X_(SET_MHS|GET_MDMSTS) */ 207 #define CONTROL_DTR 0x0001 208 #define CONTROL_RTS 0x0002 209 #define CONTROL_CTS 0x0010 210 #define CONTROL_DSR 0x0020 211 #define CONTROL_RING 0x0040 212 #define CONTROL_DCD 0x0080 213 #define CONTROL_WRITE_DTR 0x0100 214 #define CONTROL_WRITE_RTS 0x0200 215 216 /* 217 * cp210x_get_config 218 * Reads from the CP210x configuration registers 219 * 'size' is specified in bytes. 220 * 'data' is a pointer to a pre-allocated array of integers large 221 * enough to hold 'size' bytes (with 4 bytes to each integer) 222 */ 223 static int cp210x_get_config(struct usb_serial_port *port, u8 request, 224 unsigned int *data, int size) 225 { 226 struct usb_serial *serial = port->serial; 227 __le32 *buf; 228 int result, i, length; 229 230 /* Number of integers required to contain the array */ 231 length = (((size - 1) | 3) + 1)/4; 232 233 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL); 234 if (!buf) { 235 dev_err(&port->dev, "%s - out of memory.\n", __func__); 236 return -ENOMEM; 237 } 238 239 /* Issue the request, attempting to read 'size' bytes */ 240 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 241 request, REQTYPE_DEVICE_TO_HOST, 0x0000, 242 0, buf, size, 300); 243 244 /* Convert data into an array of integers */ 245 for (i = 0; i < length; i++) 246 data[i] = le32_to_cpu(buf[i]); 247 248 kfree(buf); 249 250 if (result != size) { 251 dbg("%s - Unable to send config request, " 252 "request=0x%x size=%d result=%d\n", 253 __func__, request, size, result); 254 return -EPROTO; 255 } 256 257 return 0; 258 } 259 260 /* 261 * cp210x_set_config 262 * Writes to the CP210x configuration registers 263 * Values less than 16 bits wide are sent directly 264 * 'size' is specified in bytes. 265 */ 266 static int cp210x_set_config(struct usb_serial_port *port, u8 request, 267 unsigned int *data, int size) 268 { 269 struct usb_serial *serial = port->serial; 270 __le32 *buf; 271 int result, i, length; 272 273 /* Number of integers required to contain the array */ 274 length = (((size - 1) | 3) + 1)/4; 275 276 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL); 277 if (!buf) { 278 dev_err(&port->dev, "%s - out of memory.\n", 279 __func__); 280 return -ENOMEM; 281 } 282 283 /* Array of integers into bytes */ 284 for (i = 0; i < length; i++) 285 buf[i] = cpu_to_le32(data[i]); 286 287 if (size > 2) { 288 result = usb_control_msg(serial->dev, 289 usb_sndctrlpipe(serial->dev, 0), 290 request, REQTYPE_HOST_TO_DEVICE, 0x0000, 291 0, buf, size, 300); 292 } else { 293 result = usb_control_msg(serial->dev, 294 usb_sndctrlpipe(serial->dev, 0), 295 request, REQTYPE_HOST_TO_DEVICE, data[0], 296 0, NULL, 0, 300); 297 } 298 299 kfree(buf); 300 301 if ((size > 2 && result != size) || result < 0) { 302 dbg("%s - Unable to send request, " 303 "request=0x%x size=%d result=%d\n", 304 __func__, request, size, result); 305 return -EPROTO; 306 } 307 308 /* Single data value */ 309 result = usb_control_msg(serial->dev, 310 usb_sndctrlpipe(serial->dev, 0), 311 request, REQTYPE_HOST_TO_DEVICE, data[0], 312 0, NULL, 0, 300); 313 return 0; 314 } 315 316 /* 317 * cp210x_set_config_single 318 * Convenience function for calling cp210x_set_config on single data values 319 * without requiring an integer pointer 320 */ 321 static inline int cp210x_set_config_single(struct usb_serial_port *port, 322 u8 request, unsigned int data) 323 { 324 return cp210x_set_config(port, request, &data, 2); 325 } 326 327 /* 328 * cp210x_quantise_baudrate 329 * Quantises the baud rate as per AN205 Table 1 330 */ 331 static unsigned int cp210x_quantise_baudrate(unsigned int baud) { 332 if (baud <= 56) baud = 0; 333 else if (baud <= 300) baud = 300; 334 else if (baud <= 600) baud = 600; 335 else if (baud <= 1200) baud = 1200; 336 else if (baud <= 1800) baud = 1800; 337 else if (baud <= 2400) baud = 2400; 338 else if (baud <= 4000) baud = 4000; 339 else if (baud <= 4803) baud = 4800; 340 else if (baud <= 7207) baud = 7200; 341 else if (baud <= 9612) baud = 9600; 342 else if (baud <= 14428) baud = 14400; 343 else if (baud <= 16062) baud = 16000; 344 else if (baud <= 19250) baud = 19200; 345 else if (baud <= 28912) baud = 28800; 346 else if (baud <= 38601) baud = 38400; 347 else if (baud <= 51558) baud = 51200; 348 else if (baud <= 56280) baud = 56000; 349 else if (baud <= 58053) baud = 57600; 350 else if (baud <= 64111) baud = 64000; 351 else if (baud <= 77608) baud = 76800; 352 else if (baud <= 117028) baud = 115200; 353 else if (baud <= 129347) baud = 128000; 354 else if (baud <= 156868) baud = 153600; 355 else if (baud <= 237832) baud = 230400; 356 else if (baud <= 254234) baud = 250000; 357 else if (baud <= 273066) baud = 256000; 358 else if (baud <= 491520) baud = 460800; 359 else if (baud <= 567138) baud = 500000; 360 else if (baud <= 670254) baud = 576000; 361 else if (baud <= 1053257) baud = 921600; 362 else if (baud <= 1474560) baud = 1228800; 363 else if (baud <= 2457600) baud = 1843200; 364 else baud = 3686400; 365 return baud; 366 } 367 368 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port, 369 struct file *filp) 370 { 371 struct usb_serial *serial = port->serial; 372 int result; 373 374 dbg("%s - port %d", __func__, port->number); 375 376 if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) { 377 dev_err(&port->dev, "%s - Unable to enable UART\n", 378 __func__); 379 return -EPROTO; 380 } 381 382 /* Start reading from the device */ 383 usb_fill_bulk_urb(port->read_urb, serial->dev, 384 usb_rcvbulkpipe(serial->dev, 385 port->bulk_in_endpointAddress), 386 port->read_urb->transfer_buffer, 387 port->read_urb->transfer_buffer_length, 388 serial->type->read_bulk_callback, 389 port); 390 result = usb_submit_urb(port->read_urb, GFP_KERNEL); 391 if (result) { 392 dev_err(&port->dev, "%s - failed resubmitting read urb, " 393 "error %d\n", __func__, result); 394 return result; 395 } 396 397 /* Configure the termios structure */ 398 cp210x_get_termios(tty, port); 399 400 /* Set the DTR and RTS pins low */ 401 cp210x_tiocmset_port(tty ? (struct usb_serial_port *) tty->driver_data 402 : port, 403 NULL, TIOCM_DTR | TIOCM_RTS, 0); 404 405 return 0; 406 } 407 408 static void cp210x_cleanup(struct usb_serial_port *port) 409 { 410 struct usb_serial *serial = port->serial; 411 412 dbg("%s - port %d", __func__, port->number); 413 414 if (serial->dev) { 415 /* shutdown any bulk reads that might be going on */ 416 if (serial->num_bulk_out) 417 usb_kill_urb(port->write_urb); 418 if (serial->num_bulk_in) 419 usb_kill_urb(port->read_urb); 420 } 421 } 422 423 static void cp210x_close(struct usb_serial_port *port) 424 { 425 dbg("%s - port %d", __func__, port->number); 426 427 /* shutdown our urbs */ 428 dbg("%s - shutting down urbs", __func__); 429 usb_kill_urb(port->write_urb); 430 usb_kill_urb(port->read_urb); 431 432 mutex_lock(&port->serial->disc_mutex); 433 if (!port->serial->disconnected) 434 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE); 435 mutex_unlock(&port->serial->disc_mutex); 436 } 437 438 /* 439 * cp210x_get_termios 440 * Reads the baud rate, data bits, parity, stop bits and flow control mode 441 * from the device, corrects any unsupported values, and configures the 442 * termios structure to reflect the state of the device 443 */ 444 static void cp210x_get_termios(struct tty_struct *tty, 445 struct usb_serial_port *port) 446 { 447 unsigned int baud; 448 449 if (tty) { 450 cp210x_get_termios_port(tty->driver_data, 451 &tty->termios->c_cflag, &baud); 452 tty_encode_baud_rate(tty, baud, baud); 453 } 454 455 else { 456 unsigned int cflag; 457 cflag = 0; 458 cp210x_get_termios_port(port, &cflag, &baud); 459 } 460 } 461 462 /* 463 * cp210x_get_termios_port 464 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port. 465 */ 466 static void cp210x_get_termios_port(struct usb_serial_port *port, 467 unsigned int *cflagp, unsigned int *baudp) 468 { 469 unsigned int cflag, modem_ctl[4]; 470 unsigned int baud; 471 unsigned int bits; 472 473 dbg("%s - port %d", __func__, port->number); 474 475 cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2); 476 /* Convert to baudrate */ 477 if (baud) 478 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud); 479 480 dbg("%s - baud rate = %d", __func__, baud); 481 *baudp = baud; 482 483 cflag = *cflagp; 484 485 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 486 cflag &= ~CSIZE; 487 switch (bits & BITS_DATA_MASK) { 488 case BITS_DATA_5: 489 dbg("%s - data bits = 5", __func__); 490 cflag |= CS5; 491 break; 492 case BITS_DATA_6: 493 dbg("%s - data bits = 6", __func__); 494 cflag |= CS6; 495 break; 496 case BITS_DATA_7: 497 dbg("%s - data bits = 7", __func__); 498 cflag |= CS7; 499 break; 500 case BITS_DATA_8: 501 dbg("%s - data bits = 8", __func__); 502 cflag |= CS8; 503 break; 504 case BITS_DATA_9: 505 dbg("%s - data bits = 9 (not supported, using 8 data bits)", 506 __func__); 507 cflag |= CS8; 508 bits &= ~BITS_DATA_MASK; 509 bits |= BITS_DATA_8; 510 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 511 break; 512 default: 513 dbg("%s - Unknown number of data bits, using 8", __func__); 514 cflag |= CS8; 515 bits &= ~BITS_DATA_MASK; 516 bits |= BITS_DATA_8; 517 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 518 break; 519 } 520 521 switch (bits & BITS_PARITY_MASK) { 522 case BITS_PARITY_NONE: 523 dbg("%s - parity = NONE", __func__); 524 cflag &= ~PARENB; 525 break; 526 case BITS_PARITY_ODD: 527 dbg("%s - parity = ODD", __func__); 528 cflag |= (PARENB|PARODD); 529 break; 530 case BITS_PARITY_EVEN: 531 dbg("%s - parity = EVEN", __func__); 532 cflag &= ~PARODD; 533 cflag |= PARENB; 534 break; 535 case BITS_PARITY_MARK: 536 dbg("%s - parity = MARK (not supported, disabling parity)", 537 __func__); 538 cflag &= ~PARENB; 539 bits &= ~BITS_PARITY_MASK; 540 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 541 break; 542 case BITS_PARITY_SPACE: 543 dbg("%s - parity = SPACE (not supported, disabling parity)", 544 __func__); 545 cflag &= ~PARENB; 546 bits &= ~BITS_PARITY_MASK; 547 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 548 break; 549 default: 550 dbg("%s - Unknown parity mode, disabling parity", __func__); 551 cflag &= ~PARENB; 552 bits &= ~BITS_PARITY_MASK; 553 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 554 break; 555 } 556 557 cflag &= ~CSTOPB; 558 switch (bits & BITS_STOP_MASK) { 559 case BITS_STOP_1: 560 dbg("%s - stop bits = 1", __func__); 561 break; 562 case BITS_STOP_1_5: 563 dbg("%s - stop bits = 1.5 (not supported, 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 case BITS_STOP_2: 569 dbg("%s - stop bits = 2", __func__); 570 cflag |= CSTOPB; 571 break; 572 default: 573 dbg("%s - Unknown number of stop bits, using 1 stop bit", 574 __func__); 575 bits &= ~BITS_STOP_MASK; 576 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 577 break; 578 } 579 580 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 581 if (modem_ctl[0] & 0x0008) { 582 dbg("%s - flow control = CRTSCTS", __func__); 583 cflag |= CRTSCTS; 584 } else { 585 dbg("%s - flow control = NONE", __func__); 586 cflag &= ~CRTSCTS; 587 } 588 589 *cflagp = cflag; 590 } 591 592 static void cp210x_set_termios(struct tty_struct *tty, 593 struct usb_serial_port *port, struct ktermios *old_termios) 594 { 595 unsigned int cflag, old_cflag; 596 unsigned int baud = 0, bits; 597 unsigned int modem_ctl[4]; 598 599 dbg("%s - port %d", __func__, port->number); 600 601 if (!tty) 602 return; 603 604 tty->termios->c_cflag &= ~CMSPAR; 605 cflag = tty->termios->c_cflag; 606 old_cflag = old_termios->c_cflag; 607 baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty)); 608 609 /* If the baud rate is to be updated*/ 610 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) { 611 dbg("%s - Setting baud rate to %d baud", __func__, 612 baud); 613 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV, 614 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) { 615 dbg("Baud rate requested not supported by device\n"); 616 baud = tty_termios_baud_rate(old_termios); 617 } 618 } 619 /* Report back the resulting baud rate */ 620 tty_encode_baud_rate(tty, baud, baud); 621 622 /* If the number of data bits is to be updated */ 623 if ((cflag & CSIZE) != (old_cflag & CSIZE)) { 624 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 625 bits &= ~BITS_DATA_MASK; 626 switch (cflag & CSIZE) { 627 case CS5: 628 bits |= BITS_DATA_5; 629 dbg("%s - data bits = 5", __func__); 630 break; 631 case CS6: 632 bits |= BITS_DATA_6; 633 dbg("%s - data bits = 6", __func__); 634 break; 635 case CS7: 636 bits |= BITS_DATA_7; 637 dbg("%s - data bits = 7", __func__); 638 break; 639 case CS8: 640 bits |= BITS_DATA_8; 641 dbg("%s - data bits = 8", __func__); 642 break; 643 /*case CS9: 644 bits |= BITS_DATA_9; 645 dbg("%s - data bits = 9", __func__); 646 break;*/ 647 default: 648 dbg("cp210x driver does not " 649 "support the number of bits requested," 650 " using 8 bit mode\n"); 651 bits |= BITS_DATA_8; 652 break; 653 } 654 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 655 dbg("Number of data bits requested " 656 "not supported by device\n"); 657 } 658 659 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) { 660 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 661 bits &= ~BITS_PARITY_MASK; 662 if (cflag & PARENB) { 663 if (cflag & PARODD) { 664 bits |= BITS_PARITY_ODD; 665 dbg("%s - parity = ODD", __func__); 666 } else { 667 bits |= BITS_PARITY_EVEN; 668 dbg("%s - parity = EVEN", __func__); 669 } 670 } 671 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 672 dbg("Parity mode not supported " 673 "by device\n"); 674 } 675 676 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { 677 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 678 bits &= ~BITS_STOP_MASK; 679 if (cflag & CSTOPB) { 680 bits |= BITS_STOP_2; 681 dbg("%s - stop bits = 2", __func__); 682 } else { 683 bits |= BITS_STOP_1; 684 dbg("%s - stop bits = 1", __func__); 685 } 686 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 687 dbg("Number of stop bits requested " 688 "not supported by device\n"); 689 } 690 691 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { 692 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 693 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", 694 __func__, modem_ctl[0], modem_ctl[1], 695 modem_ctl[2], modem_ctl[3]); 696 697 if (cflag & CRTSCTS) { 698 modem_ctl[0] &= ~0x7B; 699 modem_ctl[0] |= 0x09; 700 modem_ctl[1] = 0x80; 701 dbg("%s - flow control = CRTSCTS", __func__); 702 } else { 703 modem_ctl[0] &= ~0x7B; 704 modem_ctl[0] |= 0x01; 705 modem_ctl[1] |= 0x40; 706 dbg("%s - flow control = NONE", __func__); 707 } 708 709 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", 710 __func__, modem_ctl[0], modem_ctl[1], 711 modem_ctl[2], modem_ctl[3]); 712 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16); 713 } 714 715 } 716 717 static int cp210x_tiocmset (struct tty_struct *tty, struct file *file, 718 unsigned int set, unsigned int clear) 719 { 720 struct usb_serial_port *port = tty->driver_data; 721 return cp210x_tiocmset_port(port, file, set, clear); 722 } 723 724 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *file, 725 unsigned int set, unsigned int clear) 726 { 727 unsigned int control = 0; 728 729 dbg("%s - port %d", __func__, port->number); 730 731 if (set & TIOCM_RTS) { 732 control |= CONTROL_RTS; 733 control |= CONTROL_WRITE_RTS; 734 } 735 if (set & TIOCM_DTR) { 736 control |= CONTROL_DTR; 737 control |= CONTROL_WRITE_DTR; 738 } 739 if (clear & TIOCM_RTS) { 740 control &= ~CONTROL_RTS; 741 control |= CONTROL_WRITE_RTS; 742 } 743 if (clear & TIOCM_DTR) { 744 control &= ~CONTROL_DTR; 745 control |= CONTROL_WRITE_DTR; 746 } 747 748 dbg("%s - control = 0x%.4x", __func__, control); 749 750 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2); 751 } 752 753 static int cp210x_tiocmget (struct tty_struct *tty, struct file *file) 754 { 755 struct usb_serial_port *port = tty->driver_data; 756 unsigned int control; 757 int result; 758 759 dbg("%s - port %d", __func__, port->number); 760 761 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1); 762 763 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) 764 |((control & CONTROL_RTS) ? TIOCM_RTS : 0) 765 |((control & CONTROL_CTS) ? TIOCM_CTS : 0) 766 |((control & CONTROL_DSR) ? TIOCM_DSR : 0) 767 |((control & CONTROL_RING)? TIOCM_RI : 0) 768 |((control & CONTROL_DCD) ? TIOCM_CD : 0); 769 770 dbg("%s - control = 0x%.2x", __func__, control); 771 772 return result; 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 void cp210x_disconnect(struct usb_serial *serial) 798 { 799 int i; 800 801 dbg("%s", __func__); 802 803 /* Stop reads and writes on all ports */ 804 for (i = 0; i < serial->num_ports; ++i) 805 cp210x_cleanup(serial->port[i]); 806 } 807 808 static int __init cp210x_init(void) 809 { 810 int retval; 811 812 retval = usb_serial_register(&cp210x_device); 813 if (retval) 814 return retval; /* Failed to register */ 815 816 retval = usb_register(&cp210x_driver); 817 if (retval) { 818 /* Failed to register */ 819 usb_serial_deregister(&cp210x_device); 820 return retval; 821 } 822 823 /* Success */ 824 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 825 DRIVER_DESC "\n"); 826 return 0; 827 } 828 829 static void __exit cp210x_exit(void) 830 { 831 usb_deregister(&cp210x_driver); 832 usb_serial_deregister(&cp210x_device); 833 } 834 835 module_init(cp210x_init); 836 module_exit(cp210x_exit); 837 838 MODULE_DESCRIPTION(DRIVER_DESC); 839 MODULE_VERSION(DRIVER_VERSION); 840 MODULE_LICENSE("GPL"); 841 842 module_param(debug, bool, S_IRUGO | S_IWUSR); 843 MODULE_PARM_DESC(debug, "Enable verbose debugging messages"); 844