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_cleanup(struct usb_serial_port *); 38 static void cp210x_close(struct usb_serial_port *); 39 static void cp210x_get_termios(struct tty_struct *, 40 struct usb_serial_port *port); 41 static void cp210x_get_termios_port(struct usb_serial_port *port, 42 unsigned int *cflagp, unsigned int *baudp); 43 static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *, 44 struct ktermios*); 45 static int cp210x_tiocmget(struct tty_struct *, struct file *); 46 static int cp210x_tiocmset(struct tty_struct *, struct file *, 47 unsigned int, unsigned int); 48 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *, 49 unsigned int, unsigned int); 50 static void cp210x_break_ctl(struct tty_struct *, int); 51 static int cp210x_startup(struct usb_serial *); 52 static void cp210x_disconnect(struct usb_serial *); 53 54 static int debug; 55 56 static 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(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(0x0FCF, 0x1003) }, /* Dynastream ANT development board */ 63 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */ 64 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */ 65 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */ 66 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */ 67 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */ 68 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */ 69 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */ 70 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */ 71 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */ 72 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */ 73 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */ 74 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */ 75 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */ 76 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */ 77 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */ 78 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */ 79 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */ 80 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */ 81 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */ 82 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */ 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, 0x8382) }, /* Cygnal Integrated Products, Inc. */ 100 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */ 101 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */ 102 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */ 103 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ 104 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ 105 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */ 106 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */ 107 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */ 108 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */ 109 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ 110 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */ 111 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ 112 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */ 113 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ 114 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ 115 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */ 116 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB 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 { 373 struct usb_serial *serial = port->serial; 374 int result; 375 376 dbg("%s - port %d", __func__, port->number); 377 378 if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) { 379 dev_err(&port->dev, "%s - Unable to enable UART\n", 380 __func__); 381 return -EPROTO; 382 } 383 384 /* Start reading from the device */ 385 usb_fill_bulk_urb(port->read_urb, serial->dev, 386 usb_rcvbulkpipe(serial->dev, 387 port->bulk_in_endpointAddress), 388 port->read_urb->transfer_buffer, 389 port->read_urb->transfer_buffer_length, 390 serial->type->read_bulk_callback, 391 port); 392 result = usb_submit_urb(port->read_urb, GFP_KERNEL); 393 if (result) { 394 dev_err(&port->dev, "%s - failed resubmitting read urb, " 395 "error %d\n", __func__, result); 396 return result; 397 } 398 399 /* Configure the termios structure */ 400 cp210x_get_termios(tty, port); 401 return 0; 402 } 403 404 static void cp210x_cleanup(struct usb_serial_port *port) 405 { 406 struct usb_serial *serial = port->serial; 407 408 dbg("%s - port %d", __func__, port->number); 409 410 if (serial->dev) { 411 /* shutdown any bulk reads that might be going on */ 412 if (serial->num_bulk_out) 413 usb_kill_urb(port->write_urb); 414 if (serial->num_bulk_in) 415 usb_kill_urb(port->read_urb); 416 } 417 } 418 419 static void cp210x_close(struct usb_serial_port *port) 420 { 421 dbg("%s - port %d", __func__, port->number); 422 423 /* shutdown our urbs */ 424 dbg("%s - shutting down urbs", __func__); 425 usb_kill_urb(port->write_urb); 426 usb_kill_urb(port->read_urb); 427 428 mutex_lock(&port->serial->disc_mutex); 429 if (!port->serial->disconnected) 430 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE); 431 mutex_unlock(&port->serial->disc_mutex); 432 } 433 434 /* 435 * cp210x_get_termios 436 * Reads the baud rate, data bits, parity, stop bits and flow control mode 437 * from the device, corrects any unsupported values, and configures the 438 * termios structure to reflect the state of the device 439 */ 440 static void cp210x_get_termios(struct tty_struct *tty, 441 struct usb_serial_port *port) 442 { 443 unsigned int baud; 444 445 if (tty) { 446 cp210x_get_termios_port(tty->driver_data, 447 &tty->termios->c_cflag, &baud); 448 tty_encode_baud_rate(tty, baud, baud); 449 } 450 451 else { 452 unsigned int cflag; 453 cflag = 0; 454 cp210x_get_termios_port(port, &cflag, &baud); 455 } 456 } 457 458 /* 459 * cp210x_get_termios_port 460 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port. 461 */ 462 static void cp210x_get_termios_port(struct usb_serial_port *port, 463 unsigned int *cflagp, unsigned int *baudp) 464 { 465 unsigned int cflag, modem_ctl[4]; 466 unsigned int baud; 467 unsigned int bits; 468 469 dbg("%s - port %d", __func__, port->number); 470 471 cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2); 472 /* Convert to baudrate */ 473 if (baud) 474 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud); 475 476 dbg("%s - baud rate = %d", __func__, baud); 477 *baudp = baud; 478 479 cflag = *cflagp; 480 481 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 482 cflag &= ~CSIZE; 483 switch (bits & BITS_DATA_MASK) { 484 case BITS_DATA_5: 485 dbg("%s - data bits = 5", __func__); 486 cflag |= CS5; 487 break; 488 case BITS_DATA_6: 489 dbg("%s - data bits = 6", __func__); 490 cflag |= CS6; 491 break; 492 case BITS_DATA_7: 493 dbg("%s - data bits = 7", __func__); 494 cflag |= CS7; 495 break; 496 case BITS_DATA_8: 497 dbg("%s - data bits = 8", __func__); 498 cflag |= CS8; 499 break; 500 case BITS_DATA_9: 501 dbg("%s - data bits = 9 (not supported, using 8 data bits)", 502 __func__); 503 cflag |= CS8; 504 bits &= ~BITS_DATA_MASK; 505 bits |= BITS_DATA_8; 506 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 507 break; 508 default: 509 dbg("%s - Unknown number of data bits, using 8", __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 } 516 517 switch (bits & BITS_PARITY_MASK) { 518 case BITS_PARITY_NONE: 519 dbg("%s - parity = NONE", __func__); 520 cflag &= ~PARENB; 521 break; 522 case BITS_PARITY_ODD: 523 dbg("%s - parity = ODD", __func__); 524 cflag |= (PARENB|PARODD); 525 break; 526 case BITS_PARITY_EVEN: 527 dbg("%s - parity = EVEN", __func__); 528 cflag &= ~PARODD; 529 cflag |= PARENB; 530 break; 531 case BITS_PARITY_MARK: 532 dbg("%s - parity = MARK (not supported, disabling parity)", 533 __func__); 534 cflag &= ~PARENB; 535 bits &= ~BITS_PARITY_MASK; 536 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 537 break; 538 case BITS_PARITY_SPACE: 539 dbg("%s - parity = SPACE (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 default: 546 dbg("%s - Unknown parity mode, disabling parity", __func__); 547 cflag &= ~PARENB; 548 bits &= ~BITS_PARITY_MASK; 549 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 550 break; 551 } 552 553 cflag &= ~CSTOPB; 554 switch (bits & BITS_STOP_MASK) { 555 case BITS_STOP_1: 556 dbg("%s - stop bits = 1", __func__); 557 break; 558 case BITS_STOP_1_5: 559 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)", 560 __func__); 561 bits &= ~BITS_STOP_MASK; 562 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 563 break; 564 case BITS_STOP_2: 565 dbg("%s - stop bits = 2", __func__); 566 cflag |= CSTOPB; 567 break; 568 default: 569 dbg("%s - Unknown number of stop bits, using 1 stop bit", 570 __func__); 571 bits &= ~BITS_STOP_MASK; 572 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 573 break; 574 } 575 576 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 577 if (modem_ctl[0] & 0x0008) { 578 dbg("%s - flow control = CRTSCTS", __func__); 579 cflag |= CRTSCTS; 580 } else { 581 dbg("%s - flow control = NONE", __func__); 582 cflag &= ~CRTSCTS; 583 } 584 585 *cflagp = cflag; 586 } 587 588 static void cp210x_set_termios(struct tty_struct *tty, 589 struct usb_serial_port *port, struct ktermios *old_termios) 590 { 591 unsigned int cflag, old_cflag; 592 unsigned int baud = 0, bits; 593 unsigned int modem_ctl[4]; 594 595 dbg("%s - port %d", __func__, port->number); 596 597 if (!tty) 598 return; 599 600 tty->termios->c_cflag &= ~CMSPAR; 601 cflag = tty->termios->c_cflag; 602 old_cflag = old_termios->c_cflag; 603 baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty)); 604 605 /* If the baud rate is to be updated*/ 606 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) { 607 dbg("%s - Setting baud rate to %d baud", __func__, 608 baud); 609 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV, 610 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) { 611 dbg("Baud rate requested not supported by device\n"); 612 baud = tty_termios_baud_rate(old_termios); 613 } 614 } 615 /* Report back the resulting baud rate */ 616 tty_encode_baud_rate(tty, baud, baud); 617 618 /* If the number of data bits is to be updated */ 619 if ((cflag & CSIZE) != (old_cflag & CSIZE)) { 620 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 621 bits &= ~BITS_DATA_MASK; 622 switch (cflag & CSIZE) { 623 case CS5: 624 bits |= BITS_DATA_5; 625 dbg("%s - data bits = 5", __func__); 626 break; 627 case CS6: 628 bits |= BITS_DATA_6; 629 dbg("%s - data bits = 6", __func__); 630 break; 631 case CS7: 632 bits |= BITS_DATA_7; 633 dbg("%s - data bits = 7", __func__); 634 break; 635 case CS8: 636 bits |= BITS_DATA_8; 637 dbg("%s - data bits = 8", __func__); 638 break; 639 /*case CS9: 640 bits |= BITS_DATA_9; 641 dbg("%s - data bits = 9", __func__); 642 break;*/ 643 default: 644 dbg("cp210x driver does not " 645 "support the number of bits requested," 646 " using 8 bit mode\n"); 647 bits |= BITS_DATA_8; 648 break; 649 } 650 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 651 dbg("Number of data bits requested " 652 "not supported by device\n"); 653 } 654 655 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) { 656 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 657 bits &= ~BITS_PARITY_MASK; 658 if (cflag & PARENB) { 659 if (cflag & PARODD) { 660 bits |= BITS_PARITY_ODD; 661 dbg("%s - parity = ODD", __func__); 662 } else { 663 bits |= BITS_PARITY_EVEN; 664 dbg("%s - parity = EVEN", __func__); 665 } 666 } 667 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 668 dbg("Parity mode not supported " 669 "by device\n"); 670 } 671 672 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { 673 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 674 bits &= ~BITS_STOP_MASK; 675 if (cflag & CSTOPB) { 676 bits |= BITS_STOP_2; 677 dbg("%s - stop bits = 2", __func__); 678 } else { 679 bits |= BITS_STOP_1; 680 dbg("%s - stop bits = 1", __func__); 681 } 682 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 683 dbg("Number of stop bits requested " 684 "not supported by device\n"); 685 } 686 687 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { 688 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 689 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", 690 __func__, modem_ctl[0], modem_ctl[1], 691 modem_ctl[2], modem_ctl[3]); 692 693 if (cflag & CRTSCTS) { 694 modem_ctl[0] &= ~0x7B; 695 modem_ctl[0] |= 0x09; 696 modem_ctl[1] = 0x80; 697 dbg("%s - flow control = CRTSCTS", __func__); 698 } else { 699 modem_ctl[0] &= ~0x7B; 700 modem_ctl[0] |= 0x01; 701 modem_ctl[1] |= 0x40; 702 dbg("%s - flow control = NONE", __func__); 703 } 704 705 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", 706 __func__, modem_ctl[0], modem_ctl[1], 707 modem_ctl[2], modem_ctl[3]); 708 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16); 709 } 710 711 } 712 713 static int cp210x_tiocmset (struct tty_struct *tty, struct file *file, 714 unsigned int set, unsigned int clear) 715 { 716 struct usb_serial_port *port = tty->driver_data; 717 return cp210x_tiocmset_port(port, file, set, clear); 718 } 719 720 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *file, 721 unsigned int set, unsigned int clear) 722 { 723 unsigned int control = 0; 724 725 dbg("%s - port %d", __func__, port->number); 726 727 if (set & TIOCM_RTS) { 728 control |= CONTROL_RTS; 729 control |= CONTROL_WRITE_RTS; 730 } 731 if (set & TIOCM_DTR) { 732 control |= CONTROL_DTR; 733 control |= CONTROL_WRITE_DTR; 734 } 735 if (clear & TIOCM_RTS) { 736 control &= ~CONTROL_RTS; 737 control |= CONTROL_WRITE_RTS; 738 } 739 if (clear & TIOCM_DTR) { 740 control &= ~CONTROL_DTR; 741 control |= CONTROL_WRITE_DTR; 742 } 743 744 dbg("%s - control = 0x%.4x", __func__, control); 745 746 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2); 747 } 748 749 static int cp210x_tiocmget (struct tty_struct *tty, struct file *file) 750 { 751 struct usb_serial_port *port = tty->driver_data; 752 unsigned int control; 753 int result; 754 755 dbg("%s - port %d", __func__, port->number); 756 757 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1); 758 759 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) 760 |((control & CONTROL_RTS) ? TIOCM_RTS : 0) 761 |((control & CONTROL_CTS) ? TIOCM_CTS : 0) 762 |((control & CONTROL_DSR) ? TIOCM_DSR : 0) 763 |((control & CONTROL_RING)? TIOCM_RI : 0) 764 |((control & CONTROL_DCD) ? TIOCM_CD : 0); 765 766 dbg("%s - control = 0x%.2x", __func__, control); 767 768 return result; 769 } 770 771 static void cp210x_break_ctl (struct tty_struct *tty, int break_state) 772 { 773 struct usb_serial_port *port = tty->driver_data; 774 unsigned int state; 775 776 dbg("%s - port %d", __func__, port->number); 777 if (break_state == 0) 778 state = BREAK_OFF; 779 else 780 state = BREAK_ON; 781 dbg("%s - turning break %s", __func__, 782 state == BREAK_OFF ? "off" : "on"); 783 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2); 784 } 785 786 static int cp210x_startup(struct usb_serial *serial) 787 { 788 /* cp210x buffers behave strangely unless device is reset */ 789 usb_reset_device(serial->dev); 790 return 0; 791 } 792 793 static void cp210x_disconnect(struct usb_serial *serial) 794 { 795 int i; 796 797 dbg("%s", __func__); 798 799 /* Stop reads and writes on all ports */ 800 for (i = 0; i < serial->num_ports; ++i) 801 cp210x_cleanup(serial->port[i]); 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