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 static void cp210x_dtr_rts(struct usb_serial_port *p, int on); 54 static int cp210x_carrier_raised(struct usb_serial_port *p); 55 56 static int debug; 57 58 static const 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(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */ 62 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */ 63 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */ 64 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */ 65 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */ 66 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */ 67 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */ 68 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */ 69 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */ 70 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */ 71 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */ 72 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */ 73 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */ 74 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */ 75 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */ 76 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */ 77 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */ 78 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */ 79 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */ 80 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */ 81 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */ 82 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */ 83 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */ 84 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */ 85 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */ 86 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */ 87 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */ 88 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */ 89 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */ 90 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */ 91 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */ 92 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */ 93 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */ 94 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */ 95 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */ 96 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */ 97 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */ 98 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */ 99 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesys ETRX2USB */ 100 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */ 101 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */ 102 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */ 103 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */ 104 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */ 105 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */ 106 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ 107 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ 108 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */ 109 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */ 110 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */ 111 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */ 112 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ 113 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */ 114 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ 115 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */ 116 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ 117 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ 118 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */ 119 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */ 120 { } /* Terminating Entry */ 121 }; 122 123 MODULE_DEVICE_TABLE(usb, id_table); 124 125 static struct usb_driver cp210x_driver = { 126 .name = "cp210x", 127 .probe = usb_serial_probe, 128 .disconnect = usb_serial_disconnect, 129 .id_table = id_table, 130 .no_dynamic_id = 1, 131 }; 132 133 static struct usb_serial_driver cp210x_device = { 134 .driver = { 135 .owner = THIS_MODULE, 136 .name = "cp210x", 137 }, 138 .usb_driver = &cp210x_driver, 139 .id_table = id_table, 140 .num_ports = 1, 141 .bulk_out_size = 256, 142 .open = cp210x_open, 143 .close = cp210x_close, 144 .break_ctl = cp210x_break_ctl, 145 .set_termios = cp210x_set_termios, 146 .tiocmget = cp210x_tiocmget, 147 .tiocmset = cp210x_tiocmset, 148 .attach = cp210x_startup, 149 .disconnect = cp210x_disconnect, 150 .dtr_rts = cp210x_dtr_rts, 151 .carrier_raised = cp210x_carrier_raised 152 }; 153 154 /* Config request types */ 155 #define REQTYPE_HOST_TO_DEVICE 0x41 156 #define REQTYPE_DEVICE_TO_HOST 0xc1 157 158 /* Config request codes */ 159 #define CP210X_IFC_ENABLE 0x00 160 #define CP210X_SET_BAUDDIV 0x01 161 #define CP210X_GET_BAUDDIV 0x02 162 #define CP210X_SET_LINE_CTL 0x03 163 #define CP210X_GET_LINE_CTL 0x04 164 #define CP210X_SET_BREAK 0x05 165 #define CP210X_IMM_CHAR 0x06 166 #define CP210X_SET_MHS 0x07 167 #define CP210X_GET_MDMSTS 0x08 168 #define CP210X_SET_XON 0x09 169 #define CP210X_SET_XOFF 0x0A 170 #define CP210X_SET_EVENTMASK 0x0B 171 #define CP210X_GET_EVENTMASK 0x0C 172 #define CP210X_SET_CHAR 0x0D 173 #define CP210X_GET_CHARS 0x0E 174 #define CP210X_GET_PROPS 0x0F 175 #define CP210X_GET_COMM_STATUS 0x10 176 #define CP210X_RESET 0x11 177 #define CP210X_PURGE 0x12 178 #define CP210X_SET_FLOW 0x13 179 #define CP210X_GET_FLOW 0x14 180 #define CP210X_EMBED_EVENTS 0x15 181 #define CP210X_GET_EVENTSTATE 0x16 182 #define CP210X_SET_CHARS 0x19 183 184 /* CP210X_IFC_ENABLE */ 185 #define UART_ENABLE 0x0001 186 #define UART_DISABLE 0x0000 187 188 /* CP210X_(SET|GET)_BAUDDIV */ 189 #define BAUD_RATE_GEN_FREQ 0x384000 190 191 /* CP210X_(SET|GET)_LINE_CTL */ 192 #define BITS_DATA_MASK 0X0f00 193 #define BITS_DATA_5 0X0500 194 #define BITS_DATA_6 0X0600 195 #define BITS_DATA_7 0X0700 196 #define BITS_DATA_8 0X0800 197 #define BITS_DATA_9 0X0900 198 199 #define BITS_PARITY_MASK 0x00f0 200 #define BITS_PARITY_NONE 0x0000 201 #define BITS_PARITY_ODD 0x0010 202 #define BITS_PARITY_EVEN 0x0020 203 #define BITS_PARITY_MARK 0x0030 204 #define BITS_PARITY_SPACE 0x0040 205 206 #define BITS_STOP_MASK 0x000f 207 #define BITS_STOP_1 0x0000 208 #define BITS_STOP_1_5 0x0001 209 #define BITS_STOP_2 0x0002 210 211 /* CP210X_SET_BREAK */ 212 #define BREAK_ON 0x0000 213 #define BREAK_OFF 0x0001 214 215 /* CP210X_(SET_MHS|GET_MDMSTS) */ 216 #define CONTROL_DTR 0x0001 217 #define CONTROL_RTS 0x0002 218 #define CONTROL_CTS 0x0010 219 #define CONTROL_DSR 0x0020 220 #define CONTROL_RING 0x0040 221 #define CONTROL_DCD 0x0080 222 #define CONTROL_WRITE_DTR 0x0100 223 #define CONTROL_WRITE_RTS 0x0200 224 225 /* 226 * cp210x_get_config 227 * Reads from the CP210x configuration registers 228 * 'size' is specified in bytes. 229 * 'data' is a pointer to a pre-allocated array of integers large 230 * enough to hold 'size' bytes (with 4 bytes to each integer) 231 */ 232 static int cp210x_get_config(struct usb_serial_port *port, u8 request, 233 unsigned int *data, int size) 234 { 235 struct usb_serial *serial = port->serial; 236 __le32 *buf; 237 int result, i, length; 238 239 /* Number of integers required to contain the array */ 240 length = (((size - 1) | 3) + 1)/4; 241 242 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL); 243 if (!buf) { 244 dev_err(&port->dev, "%s - out of memory.\n", __func__); 245 return -ENOMEM; 246 } 247 248 /* Issue the request, attempting to read 'size' bytes */ 249 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 250 request, REQTYPE_DEVICE_TO_HOST, 0x0000, 251 0, buf, size, 300); 252 253 /* Convert data into an array of integers */ 254 for (i = 0; i < length; i++) 255 data[i] = le32_to_cpu(buf[i]); 256 257 kfree(buf); 258 259 if (result != size) { 260 dbg("%s - Unable to send config request, " 261 "request=0x%x size=%d result=%d\n", 262 __func__, request, size, result); 263 return -EPROTO; 264 } 265 266 return 0; 267 } 268 269 /* 270 * cp210x_set_config 271 * Writes to the CP210x configuration registers 272 * Values less than 16 bits wide are sent directly 273 * 'size' is specified in bytes. 274 */ 275 static int cp210x_set_config(struct usb_serial_port *port, u8 request, 276 unsigned int *data, int size) 277 { 278 struct usb_serial *serial = port->serial; 279 __le32 *buf; 280 int result, i, length; 281 282 /* Number of integers required to contain the array */ 283 length = (((size - 1) | 3) + 1)/4; 284 285 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL); 286 if (!buf) { 287 dev_err(&port->dev, "%s - out of memory.\n", 288 __func__); 289 return -ENOMEM; 290 } 291 292 /* Array of integers into bytes */ 293 for (i = 0; i < length; i++) 294 buf[i] = cpu_to_le32(data[i]); 295 296 if (size > 2) { 297 result = usb_control_msg(serial->dev, 298 usb_sndctrlpipe(serial->dev, 0), 299 request, REQTYPE_HOST_TO_DEVICE, 0x0000, 300 0, buf, size, 300); 301 } else { 302 result = usb_control_msg(serial->dev, 303 usb_sndctrlpipe(serial->dev, 0), 304 request, REQTYPE_HOST_TO_DEVICE, data[0], 305 0, NULL, 0, 300); 306 } 307 308 kfree(buf); 309 310 if ((size > 2 && result != size) || result < 0) { 311 dbg("%s - Unable to send request, " 312 "request=0x%x size=%d result=%d\n", 313 __func__, request, size, result); 314 return -EPROTO; 315 } 316 317 return 0; 318 } 319 320 /* 321 * cp210x_set_config_single 322 * Convenience function for calling cp210x_set_config on single data values 323 * without requiring an integer pointer 324 */ 325 static inline int cp210x_set_config_single(struct usb_serial_port *port, 326 u8 request, unsigned int data) 327 { 328 return cp210x_set_config(port, request, &data, 2); 329 } 330 331 /* 332 * cp210x_quantise_baudrate 333 * Quantises the baud rate as per AN205 Table 1 334 */ 335 static unsigned int cp210x_quantise_baudrate(unsigned int baud) { 336 if (baud <= 56) baud = 0; 337 else if (baud <= 300) baud = 300; 338 else if (baud <= 600) baud = 600; 339 else if (baud <= 1200) baud = 1200; 340 else if (baud <= 1800) baud = 1800; 341 else if (baud <= 2400) baud = 2400; 342 else if (baud <= 4000) baud = 4000; 343 else if (baud <= 4803) baud = 4800; 344 else if (baud <= 7207) baud = 7200; 345 else if (baud <= 9612) baud = 9600; 346 else if (baud <= 14428) baud = 14400; 347 else if (baud <= 16062) baud = 16000; 348 else if (baud <= 19250) baud = 19200; 349 else if (baud <= 28912) baud = 28800; 350 else if (baud <= 38601) baud = 38400; 351 else if (baud <= 51558) baud = 51200; 352 else if (baud <= 56280) baud = 56000; 353 else if (baud <= 58053) baud = 57600; 354 else if (baud <= 64111) baud = 64000; 355 else if (baud <= 77608) baud = 76800; 356 else if (baud <= 117028) baud = 115200; 357 else if (baud <= 129347) baud = 128000; 358 else if (baud <= 156868) baud = 153600; 359 else if (baud <= 237832) baud = 230400; 360 else if (baud <= 254234) baud = 250000; 361 else if (baud <= 273066) baud = 256000; 362 else if (baud <= 491520) baud = 460800; 363 else if (baud <= 567138) baud = 500000; 364 else if (baud <= 670254) baud = 576000; 365 else if (baud <= 1053257) baud = 921600; 366 else if (baud <= 1474560) baud = 1228800; 367 else if (baud <= 2457600) baud = 1843200; 368 else baud = 3686400; 369 return baud; 370 } 371 372 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port) 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 return 0; 403 } 404 405 static void cp210x_cleanup(struct usb_serial_port *port) 406 { 407 struct usb_serial *serial = port->serial; 408 409 dbg("%s - port %d", __func__, port->number); 410 411 if (serial->dev) { 412 /* shutdown any bulk reads that might be going on */ 413 if (serial->num_bulk_out) 414 usb_kill_urb(port->write_urb); 415 if (serial->num_bulk_in) 416 usb_kill_urb(port->read_urb); 417 } 418 } 419 420 static void cp210x_close(struct usb_serial_port *port) 421 { 422 dbg("%s - port %d", __func__, port->number); 423 424 /* shutdown our urbs */ 425 dbg("%s - shutting down urbs", __func__); 426 usb_kill_urb(port->write_urb); 427 usb_kill_urb(port->read_urb); 428 429 mutex_lock(&port->serial->disc_mutex); 430 if (!port->serial->disconnected) 431 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE); 432 mutex_unlock(&port->serial->disc_mutex); 433 } 434 435 /* 436 * cp210x_get_termios 437 * Reads the baud rate, data bits, parity, stop bits and flow control mode 438 * from the device, corrects any unsupported values, and configures the 439 * termios structure to reflect the state of the device 440 */ 441 static void cp210x_get_termios(struct tty_struct *tty, 442 struct usb_serial_port *port) 443 { 444 unsigned int baud; 445 446 if (tty) { 447 cp210x_get_termios_port(tty->driver_data, 448 &tty->termios->c_cflag, &baud); 449 tty_encode_baud_rate(tty, baud, baud); 450 } 451 452 else { 453 unsigned int cflag; 454 cflag = 0; 455 cp210x_get_termios_port(port, &cflag, &baud); 456 } 457 } 458 459 /* 460 * cp210x_get_termios_port 461 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port. 462 */ 463 static void cp210x_get_termios_port(struct usb_serial_port *port, 464 unsigned int *cflagp, unsigned int *baudp) 465 { 466 unsigned int cflag, modem_ctl[4]; 467 unsigned int baud; 468 unsigned int bits; 469 470 dbg("%s - port %d", __func__, port->number); 471 472 cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2); 473 /* Convert to baudrate */ 474 if (baud) 475 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud); 476 477 dbg("%s - baud rate = %d", __func__, baud); 478 *baudp = baud; 479 480 cflag = *cflagp; 481 482 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 483 cflag &= ~CSIZE; 484 switch (bits & BITS_DATA_MASK) { 485 case BITS_DATA_5: 486 dbg("%s - data bits = 5", __func__); 487 cflag |= CS5; 488 break; 489 case BITS_DATA_6: 490 dbg("%s - data bits = 6", __func__); 491 cflag |= CS6; 492 break; 493 case BITS_DATA_7: 494 dbg("%s - data bits = 7", __func__); 495 cflag |= CS7; 496 break; 497 case BITS_DATA_8: 498 dbg("%s - data bits = 8", __func__); 499 cflag |= CS8; 500 break; 501 case BITS_DATA_9: 502 dbg("%s - data bits = 9 (not supported, using 8 data bits)", 503 __func__); 504 cflag |= CS8; 505 bits &= ~BITS_DATA_MASK; 506 bits |= BITS_DATA_8; 507 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 508 break; 509 default: 510 dbg("%s - Unknown number of data bits, using 8", __func__); 511 cflag |= CS8; 512 bits &= ~BITS_DATA_MASK; 513 bits |= BITS_DATA_8; 514 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 515 break; 516 } 517 518 switch (bits & BITS_PARITY_MASK) { 519 case BITS_PARITY_NONE: 520 dbg("%s - parity = NONE", __func__); 521 cflag &= ~PARENB; 522 break; 523 case BITS_PARITY_ODD: 524 dbg("%s - parity = ODD", __func__); 525 cflag |= (PARENB|PARODD); 526 break; 527 case BITS_PARITY_EVEN: 528 dbg("%s - parity = EVEN", __func__); 529 cflag &= ~PARODD; 530 cflag |= PARENB; 531 break; 532 case BITS_PARITY_MARK: 533 dbg("%s - parity = MARK (not supported, disabling parity)", 534 __func__); 535 cflag &= ~PARENB; 536 bits &= ~BITS_PARITY_MASK; 537 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 538 break; 539 case BITS_PARITY_SPACE: 540 dbg("%s - parity = SPACE (not supported, disabling parity)", 541 __func__); 542 cflag &= ~PARENB; 543 bits &= ~BITS_PARITY_MASK; 544 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 545 break; 546 default: 547 dbg("%s - Unknown parity mode, disabling parity", __func__); 548 cflag &= ~PARENB; 549 bits &= ~BITS_PARITY_MASK; 550 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 551 break; 552 } 553 554 cflag &= ~CSTOPB; 555 switch (bits & BITS_STOP_MASK) { 556 case BITS_STOP_1: 557 dbg("%s - stop bits = 1", __func__); 558 break; 559 case BITS_STOP_1_5: 560 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)", 561 __func__); 562 bits &= ~BITS_STOP_MASK; 563 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 564 break; 565 case BITS_STOP_2: 566 dbg("%s - stop bits = 2", __func__); 567 cflag |= CSTOPB; 568 break; 569 default: 570 dbg("%s - Unknown number of stop bits, using 1 stop bit", 571 __func__); 572 bits &= ~BITS_STOP_MASK; 573 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 574 break; 575 } 576 577 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 578 if (modem_ctl[0] & 0x0008) { 579 dbg("%s - flow control = CRTSCTS", __func__); 580 cflag |= CRTSCTS; 581 } else { 582 dbg("%s - flow control = NONE", __func__); 583 cflag &= ~CRTSCTS; 584 } 585 586 *cflagp = cflag; 587 } 588 589 static void cp210x_set_termios(struct tty_struct *tty, 590 struct usb_serial_port *port, struct ktermios *old_termios) 591 { 592 unsigned int cflag, old_cflag; 593 unsigned int baud = 0, bits; 594 unsigned int modem_ctl[4]; 595 596 dbg("%s - port %d", __func__, port->number); 597 598 if (!tty) 599 return; 600 601 tty->termios->c_cflag &= ~CMSPAR; 602 cflag = tty->termios->c_cflag; 603 old_cflag = old_termios->c_cflag; 604 baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty)); 605 606 /* If the baud rate is to be updated*/ 607 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) { 608 dbg("%s - Setting baud rate to %d baud", __func__, 609 baud); 610 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV, 611 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) { 612 dbg("Baud rate requested not supported by device"); 613 baud = tty_termios_baud_rate(old_termios); 614 } 615 } 616 /* Report back the resulting baud rate */ 617 tty_encode_baud_rate(tty, baud, baud); 618 619 /* If the number of data bits is to be updated */ 620 if ((cflag & CSIZE) != (old_cflag & CSIZE)) { 621 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 622 bits &= ~BITS_DATA_MASK; 623 switch (cflag & CSIZE) { 624 case CS5: 625 bits |= BITS_DATA_5; 626 dbg("%s - data bits = 5", __func__); 627 break; 628 case CS6: 629 bits |= BITS_DATA_6; 630 dbg("%s - data bits = 6", __func__); 631 break; 632 case CS7: 633 bits |= BITS_DATA_7; 634 dbg("%s - data bits = 7", __func__); 635 break; 636 case CS8: 637 bits |= BITS_DATA_8; 638 dbg("%s - data bits = 8", __func__); 639 break; 640 /*case CS9: 641 bits |= BITS_DATA_9; 642 dbg("%s - data bits = 9", __func__); 643 break;*/ 644 default: 645 dbg("cp210x driver does not " 646 "support the number of bits requested," 647 " using 8 bit mode\n"); 648 bits |= BITS_DATA_8; 649 break; 650 } 651 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 652 dbg("Number of data bits requested " 653 "not supported by device\n"); 654 } 655 656 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) { 657 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 658 bits &= ~BITS_PARITY_MASK; 659 if (cflag & PARENB) { 660 if (cflag & PARODD) { 661 bits |= BITS_PARITY_ODD; 662 dbg("%s - parity = ODD", __func__); 663 } else { 664 bits |= BITS_PARITY_EVEN; 665 dbg("%s - parity = EVEN", __func__); 666 } 667 } 668 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 669 dbg("Parity mode not supported " 670 "by device\n"); 671 } 672 673 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { 674 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 675 bits &= ~BITS_STOP_MASK; 676 if (cflag & CSTOPB) { 677 bits |= BITS_STOP_2; 678 dbg("%s - stop bits = 2", __func__); 679 } else { 680 bits |= BITS_STOP_1; 681 dbg("%s - stop bits = 1", __func__); 682 } 683 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 684 dbg("Number of stop bits requested " 685 "not supported by device\n"); 686 } 687 688 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { 689 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 690 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", 691 __func__, modem_ctl[0], modem_ctl[1], 692 modem_ctl[2], modem_ctl[3]); 693 694 if (cflag & CRTSCTS) { 695 modem_ctl[0] &= ~0x7B; 696 modem_ctl[0] |= 0x09; 697 modem_ctl[1] = 0x80; 698 dbg("%s - flow control = CRTSCTS", __func__); 699 } else { 700 modem_ctl[0] &= ~0x7B; 701 modem_ctl[0] |= 0x01; 702 modem_ctl[1] |= 0x40; 703 dbg("%s - flow control = NONE", __func__); 704 } 705 706 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", 707 __func__, modem_ctl[0], modem_ctl[1], 708 modem_ctl[2], modem_ctl[3]); 709 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16); 710 } 711 712 } 713 714 static int cp210x_tiocmset (struct tty_struct *tty, struct file *file, 715 unsigned int set, unsigned int clear) 716 { 717 struct usb_serial_port *port = tty->driver_data; 718 return cp210x_tiocmset_port(port, file, set, clear); 719 } 720 721 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *file, 722 unsigned int set, unsigned int clear) 723 { 724 unsigned int control = 0; 725 726 dbg("%s - port %d", __func__, port->number); 727 728 if (set & TIOCM_RTS) { 729 control |= CONTROL_RTS; 730 control |= CONTROL_WRITE_RTS; 731 } 732 if (set & TIOCM_DTR) { 733 control |= CONTROL_DTR; 734 control |= CONTROL_WRITE_DTR; 735 } 736 if (clear & TIOCM_RTS) { 737 control &= ~CONTROL_RTS; 738 control |= CONTROL_WRITE_RTS; 739 } 740 if (clear & TIOCM_DTR) { 741 control &= ~CONTROL_DTR; 742 control |= CONTROL_WRITE_DTR; 743 } 744 745 dbg("%s - control = 0x%.4x", __func__, control); 746 747 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2); 748 } 749 750 static void cp210x_dtr_rts(struct usb_serial_port *p, int on) 751 { 752 if (on) 753 cp210x_tiocmset_port(p, NULL, TIOCM_DTR|TIOCM_RTS, 0); 754 else 755 cp210x_tiocmset_port(p, NULL, 0, TIOCM_DTR|TIOCM_RTS); 756 } 757 758 static int cp210x_tiocmget (struct tty_struct *tty, struct file *file) 759 { 760 struct usb_serial_port *port = tty->driver_data; 761 unsigned int control; 762 int result; 763 764 dbg("%s - port %d", __func__, port->number); 765 766 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1); 767 768 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) 769 |((control & CONTROL_RTS) ? TIOCM_RTS : 0) 770 |((control & CONTROL_CTS) ? TIOCM_CTS : 0) 771 |((control & CONTROL_DSR) ? TIOCM_DSR : 0) 772 |((control & CONTROL_RING)? TIOCM_RI : 0) 773 |((control & CONTROL_DCD) ? TIOCM_CD : 0); 774 775 dbg("%s - control = 0x%.2x", __func__, control); 776 777 return result; 778 } 779 780 static int cp210x_carrier_raised(struct usb_serial_port *p) 781 { 782 unsigned int control; 783 cp210x_get_config(p, CP210X_GET_MDMSTS, &control, 1); 784 if (control & CONTROL_DCD) 785 return 1; 786 return 0; 787 } 788 789 static void cp210x_break_ctl (struct tty_struct *tty, int break_state) 790 { 791 struct usb_serial_port *port = tty->driver_data; 792 unsigned int state; 793 794 dbg("%s - port %d", __func__, port->number); 795 if (break_state == 0) 796 state = BREAK_OFF; 797 else 798 state = BREAK_ON; 799 dbg("%s - turning break %s", __func__, 800 state == BREAK_OFF ? "off" : "on"); 801 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2); 802 } 803 804 static int cp210x_startup(struct usb_serial *serial) 805 { 806 /* cp210x buffers behave strangely unless device is reset */ 807 usb_reset_device(serial->dev); 808 return 0; 809 } 810 811 static void cp210x_disconnect(struct usb_serial *serial) 812 { 813 int i; 814 815 dbg("%s", __func__); 816 817 /* Stop reads and writes on all ports */ 818 for (i = 0; i < serial->num_ports; ++i) 819 cp210x_cleanup(serial->port[i]); 820 } 821 822 static int __init cp210x_init(void) 823 { 824 int retval; 825 826 retval = usb_serial_register(&cp210x_device); 827 if (retval) 828 return retval; /* Failed to register */ 829 830 retval = usb_register(&cp210x_driver); 831 if (retval) { 832 /* Failed to register */ 833 usb_serial_deregister(&cp210x_device); 834 return retval; 835 } 836 837 /* Success */ 838 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 839 DRIVER_DESC "\n"); 840 return 0; 841 } 842 843 static void __exit cp210x_exit(void) 844 { 845 usb_deregister(&cp210x_driver); 846 usb_serial_deregister(&cp210x_device); 847 } 848 849 module_init(cp210x_init); 850 module_exit(cp210x_exit); 851 852 MODULE_DESCRIPTION(DRIVER_DESC); 853 MODULE_VERSION(DRIVER_VERSION); 854 MODULE_LICENSE("GPL"); 855 856 module_param(debug, bool, S_IRUGO | S_IWUSR); 857 MODULE_PARM_DESC(debug, "Enable verbose debugging messages"); 858