1 /* 2 * Silicon Laboratories CP2101/CP2102 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 "v0.08" 31 #define DRIVER_DESC "Silicon Labs CP2101/CP2102 RS232 serial adaptor driver" 32 33 /* 34 * Function Prototypes 35 */ 36 static int cp2101_open(struct tty_struct *, struct usb_serial_port *, 37 struct file *); 38 static void cp2101_cleanup(struct usb_serial_port *); 39 static void cp2101_close(struct tty_struct *, struct usb_serial_port *, 40 struct file*); 41 static void cp2101_get_termios(struct tty_struct *, 42 struct usb_serial_port *port); 43 static void cp2101_get_termios_port(struct usb_serial_port *port, 44 unsigned int *cflagp, unsigned int *baudp); 45 static void cp2101_set_termios(struct tty_struct *, struct usb_serial_port *, 46 struct ktermios*); 47 static int cp2101_tiocmget(struct tty_struct *, struct file *); 48 static int cp2101_tiocmset(struct tty_struct *, struct file *, 49 unsigned int, unsigned int); 50 static int cp2101_tiocmset_port(struct usb_serial_port *port, struct file *, 51 unsigned int, unsigned int); 52 static void cp2101_break_ctl(struct tty_struct *, int); 53 static int cp2101_startup(struct usb_serial *); 54 static void cp2101_shutdown(struct usb_serial *); 55 56 static int debug; 57 58 static struct usb_device_id id_table [] = { 59 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */ 60 { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */ 61 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */ 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, 0x800A) }, /* SPORTident BSM7-D-USB main station */ 69 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */ 70 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */ 71 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */ 72 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */ 73 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */ 74 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */ 75 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */ 76 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */ 77 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */ 78 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */ 79 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */ 80 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */ 81 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */ 82 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */ 83 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */ 84 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */ 85 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */ 86 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */ 87 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */ 88 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */ 89 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */ 90 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */ 91 { USB_DEVICE(0x10c4, 0x8293) }, /* Telegesys ETRX2USB */ 92 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */ 93 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */ 94 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */ 95 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ 96 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ 97 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */ 98 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */ 99 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */ 100 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */ 101 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ 102 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ 103 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ 104 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ 105 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */ 106 { } /* Terminating Entry */ 107 }; 108 109 MODULE_DEVICE_TABLE(usb, id_table); 110 111 static struct usb_driver cp2101_driver = { 112 .name = "cp2101", 113 .probe = usb_serial_probe, 114 .disconnect = usb_serial_disconnect, 115 .id_table = id_table, 116 .no_dynamic_id = 1, 117 }; 118 119 static struct usb_serial_driver cp2101_device = { 120 .driver = { 121 .owner = THIS_MODULE, 122 .name = "cp2101", 123 }, 124 .usb_driver = &cp2101_driver, 125 .id_table = id_table, 126 .num_ports = 1, 127 .open = cp2101_open, 128 .close = cp2101_close, 129 .break_ctl = cp2101_break_ctl, 130 .set_termios = cp2101_set_termios, 131 .tiocmget = cp2101_tiocmget, 132 .tiocmset = cp2101_tiocmset, 133 .attach = cp2101_startup, 134 .shutdown = cp2101_shutdown, 135 }; 136 137 /* Config request types */ 138 #define REQTYPE_HOST_TO_DEVICE 0x41 139 #define REQTYPE_DEVICE_TO_HOST 0xc1 140 141 /* Config SET requests. To GET, add 1 to the request number */ 142 #define CP2101_UART 0x00 /* Enable / Disable */ 143 #define CP2101_BAUDRATE 0x01 /* (BAUD_RATE_GEN_FREQ / baudrate) */ 144 #define CP2101_BITS 0x03 /* 0x(0)(databits)(parity)(stopbits) */ 145 #define CP2101_BREAK 0x05 /* On / Off */ 146 #define CP2101_CONTROL 0x07 /* Flow control line states */ 147 #define CP2101_MODEMCTL 0x13 /* Modem controls */ 148 #define CP2101_CONFIG_6 0x19 /* 6 bytes of config data ??? */ 149 150 /* CP2101_UART */ 151 #define UART_ENABLE 0x0001 152 #define UART_DISABLE 0x0000 153 154 /* CP2101_BAUDRATE */ 155 #define BAUD_RATE_GEN_FREQ 0x384000 156 157 /* CP2101_BITS */ 158 #define BITS_DATA_MASK 0X0f00 159 #define BITS_DATA_5 0X0500 160 #define BITS_DATA_6 0X0600 161 #define BITS_DATA_7 0X0700 162 #define BITS_DATA_8 0X0800 163 #define BITS_DATA_9 0X0900 164 165 #define BITS_PARITY_MASK 0x00f0 166 #define BITS_PARITY_NONE 0x0000 167 #define BITS_PARITY_ODD 0x0010 168 #define BITS_PARITY_EVEN 0x0020 169 #define BITS_PARITY_MARK 0x0030 170 #define BITS_PARITY_SPACE 0x0040 171 172 #define BITS_STOP_MASK 0x000f 173 #define BITS_STOP_1 0x0000 174 #define BITS_STOP_1_5 0x0001 175 #define BITS_STOP_2 0x0002 176 177 /* CP2101_BREAK */ 178 #define BREAK_ON 0x0000 179 #define BREAK_OFF 0x0001 180 181 /* CP2101_CONTROL */ 182 #define CONTROL_DTR 0x0001 183 #define CONTROL_RTS 0x0002 184 #define CONTROL_CTS 0x0010 185 #define CONTROL_DSR 0x0020 186 #define CONTROL_RING 0x0040 187 #define CONTROL_DCD 0x0080 188 #define CONTROL_WRITE_DTR 0x0100 189 #define CONTROL_WRITE_RTS 0x0200 190 191 /* 192 * cp2101_get_config 193 * Reads from the CP2101 configuration registers 194 * 'size' is specified in bytes. 195 * 'data' is a pointer to a pre-allocated array of integers large 196 * enough to hold 'size' bytes (with 4 bytes to each integer) 197 */ 198 static int cp2101_get_config(struct usb_serial_port *port, u8 request, 199 unsigned int *data, int size) 200 { 201 struct usb_serial *serial = port->serial; 202 __le32 *buf; 203 int result, i, length; 204 205 /* Number of integers required to contain the array */ 206 length = (((size - 1) | 3) + 1)/4; 207 208 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL); 209 if (!buf) { 210 dev_err(&port->dev, "%s - out of memory.\n", __func__); 211 return -ENOMEM; 212 } 213 214 /* For get requests, the request number must be incremented */ 215 request++; 216 217 /* Issue the request, attempting to read 'size' bytes */ 218 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 219 request, REQTYPE_DEVICE_TO_HOST, 0x0000, 220 0, buf, size, 300); 221 222 /* Convert data into an array of integers */ 223 for (i = 0; i < length; i++) 224 data[i] = le32_to_cpu(buf[i]); 225 226 kfree(buf); 227 228 if (result != size) { 229 dbg("%s - Unable to send config request, " 230 "request=0x%x size=%d result=%d\n", 231 __func__, request, size, result); 232 return -EPROTO; 233 } 234 235 return 0; 236 } 237 238 /* 239 * cp2101_set_config 240 * Writes to the CP2101 configuration registers 241 * Values less than 16 bits wide are sent directly 242 * 'size' is specified in bytes. 243 */ 244 static int cp2101_set_config(struct usb_serial_port *port, u8 request, 245 unsigned int *data, int size) 246 { 247 struct usb_serial *serial = port->serial; 248 __le32 *buf; 249 int result, i, length; 250 251 /* Number of integers required to contain the array */ 252 length = (((size - 1) | 3) + 1)/4; 253 254 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL); 255 if (!buf) { 256 dev_err(&port->dev, "%s - out of memory.\n", 257 __func__); 258 return -ENOMEM; 259 } 260 261 /* Array of integers into bytes */ 262 for (i = 0; i < length; i++) 263 buf[i] = cpu_to_le32(data[i]); 264 265 if (size > 2) { 266 result = usb_control_msg(serial->dev, 267 usb_sndctrlpipe(serial->dev, 0), 268 request, REQTYPE_HOST_TO_DEVICE, 0x0000, 269 0, buf, size, 300); 270 } else { 271 result = usb_control_msg(serial->dev, 272 usb_sndctrlpipe(serial->dev, 0), 273 request, REQTYPE_HOST_TO_DEVICE, data[0], 274 0, NULL, 0, 300); 275 } 276 277 kfree(buf); 278 279 if ((size > 2 && result != size) || result < 0) { 280 dbg("%s - Unable to send request, " 281 "request=0x%x size=%d result=%d\n", 282 __func__, request, size, result); 283 return -EPROTO; 284 } 285 286 /* Single data value */ 287 result = usb_control_msg(serial->dev, 288 usb_sndctrlpipe(serial->dev, 0), 289 request, REQTYPE_HOST_TO_DEVICE, data[0], 290 0, NULL, 0, 300); 291 return 0; 292 } 293 294 /* 295 * cp2101_set_config_single 296 * Convenience function for calling cp2101_set_config on single data values 297 * without requiring an integer pointer 298 */ 299 static inline int cp2101_set_config_single(struct usb_serial_port *port, 300 u8 request, unsigned int data) 301 { 302 return cp2101_set_config(port, request, &data, 2); 303 } 304 305 /* 306 * cp2101_quantise_baudrate 307 * Quantises the baud rate as per AN205 Table 1 308 */ 309 static unsigned int cp2101_quantise_baudrate(unsigned int baud) { 310 if (baud <= 56) baud = 0; 311 else if (baud <= 300) baud = 300; 312 else if (baud <= 600) baud = 600; 313 else if (baud <= 1200) baud = 1200; 314 else if (baud <= 1800) baud = 1800; 315 else if (baud <= 2400) baud = 2400; 316 else if (baud <= 4000) baud = 4000; 317 else if (baud <= 4803) baud = 4800; 318 else if (baud <= 7207) baud = 7200; 319 else if (baud <= 9612) baud = 9600; 320 else if (baud <= 14428) baud = 14400; 321 else if (baud <= 16062) baud = 16000; 322 else if (baud <= 19250) baud = 19200; 323 else if (baud <= 28912) baud = 28800; 324 else if (baud <= 38601) baud = 38400; 325 else if (baud <= 51558) baud = 51200; 326 else if (baud <= 56280) baud = 56000; 327 else if (baud <= 58053) baud = 57600; 328 else if (baud <= 64111) baud = 64000; 329 else if (baud <= 77608) baud = 76800; 330 else if (baud <= 117028) baud = 115200; 331 else if (baud <= 129347) baud = 128000; 332 else if (baud <= 156868) baud = 153600; 333 else if (baud <= 237832) baud = 230400; 334 else if (baud <= 254234) baud = 250000; 335 else if (baud <= 273066) baud = 256000; 336 else if (baud <= 491520) baud = 460800; 337 else if (baud <= 567138) baud = 500000; 338 else if (baud <= 670254) baud = 576000; 339 else if (baud <= 1053257) baud = 921600; 340 else if (baud <= 1474560) baud = 1228800; 341 else if (baud <= 2457600) baud = 1843200; 342 else baud = 3686400; 343 return baud; 344 } 345 346 static int cp2101_open(struct tty_struct *tty, struct usb_serial_port *port, 347 struct file *filp) 348 { 349 struct usb_serial *serial = port->serial; 350 int result; 351 352 dbg("%s - port %d", __func__, port->number); 353 354 if (cp2101_set_config_single(port, CP2101_UART, UART_ENABLE)) { 355 dev_err(&port->dev, "%s - Unable to enable UART\n", 356 __func__); 357 return -EPROTO; 358 } 359 360 /* Start reading from the device */ 361 usb_fill_bulk_urb(port->read_urb, serial->dev, 362 usb_rcvbulkpipe(serial->dev, 363 port->bulk_in_endpointAddress), 364 port->read_urb->transfer_buffer, 365 port->read_urb->transfer_buffer_length, 366 serial->type->read_bulk_callback, 367 port); 368 result = usb_submit_urb(port->read_urb, GFP_KERNEL); 369 if (result) { 370 dev_err(&port->dev, "%s - failed resubmitting read urb, " 371 "error %d\n", __func__, result); 372 return result; 373 } 374 375 /* Configure the termios structure */ 376 cp2101_get_termios(tty, port); 377 378 /* Set the DTR and RTS pins low */ 379 cp2101_tiocmset_port(tty ? (struct usb_serial_port *) tty->driver_data 380 : port, 381 NULL, TIOCM_DTR | TIOCM_RTS, 0); 382 383 return 0; 384 } 385 386 static void cp2101_cleanup(struct usb_serial_port *port) 387 { 388 struct usb_serial *serial = port->serial; 389 390 dbg("%s - port %d", __func__, port->number); 391 392 if (serial->dev) { 393 /* shutdown any bulk reads that might be going on */ 394 if (serial->num_bulk_out) 395 usb_kill_urb(port->write_urb); 396 if (serial->num_bulk_in) 397 usb_kill_urb(port->read_urb); 398 } 399 } 400 401 static void cp2101_close(struct tty_struct *tty, struct usb_serial_port *port, 402 struct file *filp) 403 { 404 dbg("%s - port %d", __func__, port->number); 405 406 /* shutdown our urbs */ 407 dbg("%s - shutting down urbs", __func__); 408 usb_kill_urb(port->write_urb); 409 usb_kill_urb(port->read_urb); 410 411 mutex_lock(&port->serial->disc_mutex); 412 if (!port->serial->disconnected) 413 cp2101_set_config_single(port, CP2101_UART, UART_DISABLE); 414 mutex_unlock(&port->serial->disc_mutex); 415 } 416 417 /* 418 * cp2101_get_termios 419 * Reads the baud rate, data bits, parity, stop bits and flow control mode 420 * from the device, corrects any unsupported values, and configures the 421 * termios structure to reflect the state of the device 422 */ 423 static void cp2101_get_termios(struct tty_struct *tty, 424 struct usb_serial_port *port) 425 { 426 unsigned int baud; 427 428 if (tty) { 429 cp2101_get_termios_port(tty->driver_data, 430 &tty->termios->c_cflag, &baud); 431 tty_encode_baud_rate(tty, baud, baud); 432 } 433 434 else { 435 unsigned int cflag; 436 cflag = 0; 437 cp2101_get_termios_port(port, &cflag, &baud); 438 } 439 } 440 441 /* 442 * cp2101_get_termios_port 443 * This is the heart of cp2101_get_termios which always uses a &usb_serial_port. 444 */ 445 static void cp2101_get_termios_port(struct usb_serial_port *port, 446 unsigned int *cflagp, unsigned int *baudp) 447 { 448 unsigned int cflag, modem_ctl[4]; 449 unsigned int baud; 450 unsigned int bits; 451 452 dbg("%s - port %d", __func__, port->number); 453 454 cp2101_get_config(port, CP2101_BAUDRATE, &baud, 2); 455 /* Convert to baudrate */ 456 if (baud) 457 baud = cp2101_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud); 458 459 dbg("%s - baud rate = %d", __func__, baud); 460 *baudp = baud; 461 462 cflag = *cflagp; 463 464 cp2101_get_config(port, CP2101_BITS, &bits, 2); 465 cflag &= ~CSIZE; 466 switch (bits & BITS_DATA_MASK) { 467 case BITS_DATA_5: 468 dbg("%s - data bits = 5", __func__); 469 cflag |= CS5; 470 break; 471 case BITS_DATA_6: 472 dbg("%s - data bits = 6", __func__); 473 cflag |= CS6; 474 break; 475 case BITS_DATA_7: 476 dbg("%s - data bits = 7", __func__); 477 cflag |= CS7; 478 break; 479 case BITS_DATA_8: 480 dbg("%s - data bits = 8", __func__); 481 cflag |= CS8; 482 break; 483 case BITS_DATA_9: 484 dbg("%s - data bits = 9 (not supported, using 8 data bits)", 485 __func__); 486 cflag |= CS8; 487 bits &= ~BITS_DATA_MASK; 488 bits |= BITS_DATA_8; 489 cp2101_set_config(port, CP2101_BITS, &bits, 2); 490 break; 491 default: 492 dbg("%s - Unknown number of data bits, using 8", __func__); 493 cflag |= CS8; 494 bits &= ~BITS_DATA_MASK; 495 bits |= BITS_DATA_8; 496 cp2101_set_config(port, CP2101_BITS, &bits, 2); 497 break; 498 } 499 500 switch (bits & BITS_PARITY_MASK) { 501 case BITS_PARITY_NONE: 502 dbg("%s - parity = NONE", __func__); 503 cflag &= ~PARENB; 504 break; 505 case BITS_PARITY_ODD: 506 dbg("%s - parity = ODD", __func__); 507 cflag |= (PARENB|PARODD); 508 break; 509 case BITS_PARITY_EVEN: 510 dbg("%s - parity = EVEN", __func__); 511 cflag &= ~PARODD; 512 cflag |= PARENB; 513 break; 514 case BITS_PARITY_MARK: 515 dbg("%s - parity = MARK (not supported, disabling parity)", 516 __func__); 517 cflag &= ~PARENB; 518 bits &= ~BITS_PARITY_MASK; 519 cp2101_set_config(port, CP2101_BITS, &bits, 2); 520 break; 521 case BITS_PARITY_SPACE: 522 dbg("%s - parity = SPACE (not supported, disabling parity)", 523 __func__); 524 cflag &= ~PARENB; 525 bits &= ~BITS_PARITY_MASK; 526 cp2101_set_config(port, CP2101_BITS, &bits, 2); 527 break; 528 default: 529 dbg("%s - Unknown parity mode, disabling parity", __func__); 530 cflag &= ~PARENB; 531 bits &= ~BITS_PARITY_MASK; 532 cp2101_set_config(port, CP2101_BITS, &bits, 2); 533 break; 534 } 535 536 cflag &= ~CSTOPB; 537 switch (bits & BITS_STOP_MASK) { 538 case BITS_STOP_1: 539 dbg("%s - stop bits = 1", __func__); 540 break; 541 case BITS_STOP_1_5: 542 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)", 543 __func__); 544 bits &= ~BITS_STOP_MASK; 545 cp2101_set_config(port, CP2101_BITS, &bits, 2); 546 break; 547 case BITS_STOP_2: 548 dbg("%s - stop bits = 2", __func__); 549 cflag |= CSTOPB; 550 break; 551 default: 552 dbg("%s - Unknown number of stop bits, using 1 stop bit", 553 __func__); 554 bits &= ~BITS_STOP_MASK; 555 cp2101_set_config(port, CP2101_BITS, &bits, 2); 556 break; 557 } 558 559 cp2101_get_config(port, CP2101_MODEMCTL, modem_ctl, 16); 560 if (modem_ctl[0] & 0x0008) { 561 dbg("%s - flow control = CRTSCTS", __func__); 562 cflag |= CRTSCTS; 563 } else { 564 dbg("%s - flow control = NONE", __func__); 565 cflag &= ~CRTSCTS; 566 } 567 568 *cflagp = cflag; 569 } 570 571 static void cp2101_set_termios(struct tty_struct *tty, 572 struct usb_serial_port *port, struct ktermios *old_termios) 573 { 574 unsigned int cflag, old_cflag; 575 unsigned int baud = 0, bits; 576 unsigned int modem_ctl[4]; 577 578 dbg("%s - port %d", __func__, port->number); 579 580 if (!tty) 581 return; 582 583 tty->termios->c_cflag &= ~CMSPAR; 584 cflag = tty->termios->c_cflag; 585 old_cflag = old_termios->c_cflag; 586 baud = cp2101_quantise_baudrate(tty_get_baud_rate(tty)); 587 588 /* If the baud rate is to be updated*/ 589 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) { 590 dbg("%s - Setting baud rate to %d baud", __func__, 591 baud); 592 if (cp2101_set_config_single(port, CP2101_BAUDRATE, 593 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) { 594 dbg("Baud rate requested not supported by device\n"); 595 baud = tty_termios_baud_rate(old_termios); 596 } 597 } 598 /* Report back the resulting baud rate */ 599 tty_encode_baud_rate(tty, baud, baud); 600 601 /* If the number of data bits is to be updated */ 602 if ((cflag & CSIZE) != (old_cflag & CSIZE)) { 603 cp2101_get_config(port, CP2101_BITS, &bits, 2); 604 bits &= ~BITS_DATA_MASK; 605 switch (cflag & CSIZE) { 606 case CS5: 607 bits |= BITS_DATA_5; 608 dbg("%s - data bits = 5", __func__); 609 break; 610 case CS6: 611 bits |= BITS_DATA_6; 612 dbg("%s - data bits = 6", __func__); 613 break; 614 case CS7: 615 bits |= BITS_DATA_7; 616 dbg("%s - data bits = 7", __func__); 617 break; 618 case CS8: 619 bits |= BITS_DATA_8; 620 dbg("%s - data bits = 8", __func__); 621 break; 622 /*case CS9: 623 bits |= BITS_DATA_9; 624 dbg("%s - data bits = 9", __func__); 625 break;*/ 626 default: 627 dbg("cp2101 driver does not " 628 "support the number of bits requested," 629 " using 8 bit mode\n"); 630 bits |= BITS_DATA_8; 631 break; 632 } 633 if (cp2101_set_config(port, CP2101_BITS, &bits, 2)) 634 dbg("Number of data bits requested " 635 "not supported by device\n"); 636 } 637 638 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) { 639 cp2101_get_config(port, CP2101_BITS, &bits, 2); 640 bits &= ~BITS_PARITY_MASK; 641 if (cflag & PARENB) { 642 if (cflag & PARODD) { 643 bits |= BITS_PARITY_ODD; 644 dbg("%s - parity = ODD", __func__); 645 } else { 646 bits |= BITS_PARITY_EVEN; 647 dbg("%s - parity = EVEN", __func__); 648 } 649 } 650 if (cp2101_set_config(port, CP2101_BITS, &bits, 2)) 651 dbg("Parity mode not supported " 652 "by device\n"); 653 } 654 655 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { 656 cp2101_get_config(port, CP2101_BITS, &bits, 2); 657 bits &= ~BITS_STOP_MASK; 658 if (cflag & CSTOPB) { 659 bits |= BITS_STOP_2; 660 dbg("%s - stop bits = 2", __func__); 661 } else { 662 bits |= BITS_STOP_1; 663 dbg("%s - stop bits = 1", __func__); 664 } 665 if (cp2101_set_config(port, CP2101_BITS, &bits, 2)) 666 dbg("Number of stop bits requested " 667 "not supported by device\n"); 668 } 669 670 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { 671 cp2101_get_config(port, CP2101_MODEMCTL, modem_ctl, 16); 672 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", 673 __func__, modem_ctl[0], modem_ctl[1], 674 modem_ctl[2], modem_ctl[3]); 675 676 if (cflag & CRTSCTS) { 677 modem_ctl[0] &= ~0x7B; 678 modem_ctl[0] |= 0x09; 679 modem_ctl[1] = 0x80; 680 dbg("%s - flow control = CRTSCTS", __func__); 681 } else { 682 modem_ctl[0] &= ~0x7B; 683 modem_ctl[0] |= 0x01; 684 modem_ctl[1] |= 0x40; 685 dbg("%s - flow control = NONE", __func__); 686 } 687 688 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", 689 __func__, modem_ctl[0], modem_ctl[1], 690 modem_ctl[2], modem_ctl[3]); 691 cp2101_set_config(port, CP2101_MODEMCTL, modem_ctl, 16); 692 } 693 694 } 695 696 static int cp2101_tiocmset (struct tty_struct *tty, struct file *file, 697 unsigned int set, unsigned int clear) 698 { 699 struct usb_serial_port *port = tty->driver_data; 700 return cp2101_tiocmset_port(port, file, set, clear); 701 } 702 703 static int cp2101_tiocmset_port(struct usb_serial_port *port, struct file *file, 704 unsigned int set, unsigned int clear) 705 { 706 unsigned int control = 0; 707 708 dbg("%s - port %d", __func__, port->number); 709 710 if (set & TIOCM_RTS) { 711 control |= CONTROL_RTS; 712 control |= CONTROL_WRITE_RTS; 713 } 714 if (set & TIOCM_DTR) { 715 control |= CONTROL_DTR; 716 control |= CONTROL_WRITE_DTR; 717 } 718 if (clear & TIOCM_RTS) { 719 control &= ~CONTROL_RTS; 720 control |= CONTROL_WRITE_RTS; 721 } 722 if (clear & TIOCM_DTR) { 723 control &= ~CONTROL_DTR; 724 control |= CONTROL_WRITE_DTR; 725 } 726 727 dbg("%s - control = 0x%.4x", __func__, control); 728 729 return cp2101_set_config(port, CP2101_CONTROL, &control, 2); 730 } 731 732 static int cp2101_tiocmget (struct tty_struct *tty, struct file *file) 733 { 734 struct usb_serial_port *port = tty->driver_data; 735 unsigned int control; 736 int result; 737 738 dbg("%s - port %d", __func__, port->number); 739 740 cp2101_get_config(port, CP2101_CONTROL, &control, 1); 741 742 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) 743 |((control & CONTROL_RTS) ? TIOCM_RTS : 0) 744 |((control & CONTROL_CTS) ? TIOCM_CTS : 0) 745 |((control & CONTROL_DSR) ? TIOCM_DSR : 0) 746 |((control & CONTROL_RING)? TIOCM_RI : 0) 747 |((control & CONTROL_DCD) ? TIOCM_CD : 0); 748 749 dbg("%s - control = 0x%.2x", __func__, control); 750 751 return result; 752 } 753 754 static void cp2101_break_ctl (struct tty_struct *tty, int break_state) 755 { 756 struct usb_serial_port *port = tty->driver_data; 757 unsigned int state; 758 759 dbg("%s - port %d", __func__, port->number); 760 if (break_state == 0) 761 state = BREAK_OFF; 762 else 763 state = BREAK_ON; 764 dbg("%s - turning break %s", __func__, 765 state == BREAK_OFF ? "off" : "on"); 766 cp2101_set_config(port, CP2101_BREAK, &state, 2); 767 } 768 769 static int cp2101_startup(struct usb_serial *serial) 770 { 771 /* CP2101 buffers behave strangely unless device is reset */ 772 usb_reset_device(serial->dev); 773 return 0; 774 } 775 776 static void cp2101_shutdown(struct usb_serial *serial) 777 { 778 int i; 779 780 dbg("%s", __func__); 781 782 /* Stop reads and writes on all ports */ 783 for (i = 0; i < serial->num_ports; ++i) 784 cp2101_cleanup(serial->port[i]); 785 } 786 787 static int __init cp2101_init(void) 788 { 789 int retval; 790 791 retval = usb_serial_register(&cp2101_device); 792 if (retval) 793 return retval; /* Failed to register */ 794 795 retval = usb_register(&cp2101_driver); 796 if (retval) { 797 /* Failed to register */ 798 usb_serial_deregister(&cp2101_device); 799 return retval; 800 } 801 802 /* Success */ 803 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 804 DRIVER_DESC "\n"); 805 return 0; 806 } 807 808 static void __exit cp2101_exit(void) 809 { 810 usb_deregister(&cp2101_driver); 811 usb_serial_deregister(&cp2101_device); 812 } 813 814 module_init(cp2101_init); 815 module_exit(cp2101_exit); 816 817 MODULE_DESCRIPTION(DRIVER_DESC); 818 MODULE_VERSION(DRIVER_VERSION); 819 MODULE_LICENSE("GPL"); 820 821 module_param(debug, bool, S_IRUGO | S_IWUSR); 822 MODULE_PARM_DESC(debug, "Enable verbose debugging messages"); 823