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 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, 0x81F2) }, /* C1007 HF band RFID controller */ 95 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */ 96 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */ 97 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */ 98 { USB_DEVICE(0x10c4, 0x8293) }, /* Telegesys ETRX2USB */ 99 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */ 100 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */ 101 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */ 102 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */ 103 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */ 104 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */ 105 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ 106 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ 107 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */ 108 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */ 109 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */ 110 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */ 111 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ 112 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */ 113 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ 114 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */ 115 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ 116 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ 117 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */ 118 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */ 119 { } /* Terminating Entry */ 120 }; 121 122 MODULE_DEVICE_TABLE(usb, id_table); 123 124 static struct usb_driver cp210x_driver = { 125 .name = "cp210x", 126 .probe = usb_serial_probe, 127 .disconnect = usb_serial_disconnect, 128 .id_table = id_table, 129 .no_dynamic_id = 1, 130 }; 131 132 static struct usb_serial_driver cp210x_device = { 133 .driver = { 134 .owner = THIS_MODULE, 135 .name = "cp210x", 136 }, 137 .usb_driver = &cp210x_driver, 138 .id_table = id_table, 139 .num_ports = 1, 140 .open = cp210x_open, 141 .close = cp210x_close, 142 .break_ctl = cp210x_break_ctl, 143 .set_termios = cp210x_set_termios, 144 .tiocmget = cp210x_tiocmget, 145 .tiocmset = cp210x_tiocmset, 146 .attach = cp210x_startup, 147 .disconnect = cp210x_disconnect, 148 .dtr_rts = cp210x_dtr_rts, 149 .carrier_raised = cp210x_carrier_raised 150 }; 151 152 /* Config request types */ 153 #define REQTYPE_HOST_TO_DEVICE 0x41 154 #define REQTYPE_DEVICE_TO_HOST 0xc1 155 156 /* Config request codes */ 157 #define CP210X_IFC_ENABLE 0x00 158 #define CP210X_SET_BAUDDIV 0x01 159 #define CP210X_GET_BAUDDIV 0x02 160 #define CP210X_SET_LINE_CTL 0x03 161 #define CP210X_GET_LINE_CTL 0x04 162 #define CP210X_SET_BREAK 0x05 163 #define CP210X_IMM_CHAR 0x06 164 #define CP210X_SET_MHS 0x07 165 #define CP210X_GET_MDMSTS 0x08 166 #define CP210X_SET_XON 0x09 167 #define CP210X_SET_XOFF 0x0A 168 #define CP210X_SET_EVENTMASK 0x0B 169 #define CP210X_GET_EVENTMASK 0x0C 170 #define CP210X_SET_CHAR 0x0D 171 #define CP210X_GET_CHARS 0x0E 172 #define CP210X_GET_PROPS 0x0F 173 #define CP210X_GET_COMM_STATUS 0x10 174 #define CP210X_RESET 0x11 175 #define CP210X_PURGE 0x12 176 #define CP210X_SET_FLOW 0x13 177 #define CP210X_GET_FLOW 0x14 178 #define CP210X_EMBED_EVENTS 0x15 179 #define CP210X_GET_EVENTSTATE 0x16 180 #define CP210X_SET_CHARS 0x19 181 182 /* CP210X_IFC_ENABLE */ 183 #define UART_ENABLE 0x0001 184 #define UART_DISABLE 0x0000 185 186 /* CP210X_(SET|GET)_BAUDDIV */ 187 #define BAUD_RATE_GEN_FREQ 0x384000 188 189 /* CP210X_(SET|GET)_LINE_CTL */ 190 #define BITS_DATA_MASK 0X0f00 191 #define BITS_DATA_5 0X0500 192 #define BITS_DATA_6 0X0600 193 #define BITS_DATA_7 0X0700 194 #define BITS_DATA_8 0X0800 195 #define BITS_DATA_9 0X0900 196 197 #define BITS_PARITY_MASK 0x00f0 198 #define BITS_PARITY_NONE 0x0000 199 #define BITS_PARITY_ODD 0x0010 200 #define BITS_PARITY_EVEN 0x0020 201 #define BITS_PARITY_MARK 0x0030 202 #define BITS_PARITY_SPACE 0x0040 203 204 #define BITS_STOP_MASK 0x000f 205 #define BITS_STOP_1 0x0000 206 #define BITS_STOP_1_5 0x0001 207 #define BITS_STOP_2 0x0002 208 209 /* CP210X_SET_BREAK */ 210 #define BREAK_ON 0x0000 211 #define BREAK_OFF 0x0001 212 213 /* CP210X_(SET_MHS|GET_MDMSTS) */ 214 #define CONTROL_DTR 0x0001 215 #define CONTROL_RTS 0x0002 216 #define CONTROL_CTS 0x0010 217 #define CONTROL_DSR 0x0020 218 #define CONTROL_RING 0x0040 219 #define CONTROL_DCD 0x0080 220 #define CONTROL_WRITE_DTR 0x0100 221 #define CONTROL_WRITE_RTS 0x0200 222 223 /* 224 * cp210x_get_config 225 * Reads from the CP210x configuration registers 226 * 'size' is specified in bytes. 227 * 'data' is a pointer to a pre-allocated array of integers large 228 * enough to hold 'size' bytes (with 4 bytes to each integer) 229 */ 230 static int cp210x_get_config(struct usb_serial_port *port, u8 request, 231 unsigned int *data, int size) 232 { 233 struct usb_serial *serial = port->serial; 234 __le32 *buf; 235 int result, i, length; 236 237 /* Number of integers required to contain the array */ 238 length = (((size - 1) | 3) + 1)/4; 239 240 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL); 241 if (!buf) { 242 dev_err(&port->dev, "%s - out of memory.\n", __func__); 243 return -ENOMEM; 244 } 245 246 /* Issue the request, attempting to read 'size' bytes */ 247 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 248 request, REQTYPE_DEVICE_TO_HOST, 0x0000, 249 0, buf, size, 300); 250 251 /* Convert data into an array of integers */ 252 for (i = 0; i < length; i++) 253 data[i] = le32_to_cpu(buf[i]); 254 255 kfree(buf); 256 257 if (result != size) { 258 dbg("%s - Unable to send config request, " 259 "request=0x%x size=%d result=%d\n", 260 __func__, request, size, result); 261 return -EPROTO; 262 } 263 264 return 0; 265 } 266 267 /* 268 * cp210x_set_config 269 * Writes to the CP210x configuration registers 270 * Values less than 16 bits wide are sent directly 271 * 'size' is specified in bytes. 272 */ 273 static int cp210x_set_config(struct usb_serial_port *port, u8 request, 274 unsigned int *data, int size) 275 { 276 struct usb_serial *serial = port->serial; 277 __le32 *buf; 278 int result, i, length; 279 280 /* Number of integers required to contain the array */ 281 length = (((size - 1) | 3) + 1)/4; 282 283 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL); 284 if (!buf) { 285 dev_err(&port->dev, "%s - out of memory.\n", 286 __func__); 287 return -ENOMEM; 288 } 289 290 /* Array of integers into bytes */ 291 for (i = 0; i < length; i++) 292 buf[i] = cpu_to_le32(data[i]); 293 294 if (size > 2) { 295 result = usb_control_msg(serial->dev, 296 usb_sndctrlpipe(serial->dev, 0), 297 request, REQTYPE_HOST_TO_DEVICE, 0x0000, 298 0, buf, size, 300); 299 } else { 300 result = usb_control_msg(serial->dev, 301 usb_sndctrlpipe(serial->dev, 0), 302 request, REQTYPE_HOST_TO_DEVICE, data[0], 303 0, NULL, 0, 300); 304 } 305 306 kfree(buf); 307 308 if ((size > 2 && result != size) || result < 0) { 309 dbg("%s - Unable to send request, " 310 "request=0x%x size=%d result=%d\n", 311 __func__, request, size, result); 312 return -EPROTO; 313 } 314 315 /* Single data value */ 316 result = usb_control_msg(serial->dev, 317 usb_sndctrlpipe(serial->dev, 0), 318 request, REQTYPE_HOST_TO_DEVICE, data[0], 319 0, NULL, 0, 300); 320 return 0; 321 } 322 323 /* 324 * cp210x_set_config_single 325 * Convenience function for calling cp210x_set_config on single data values 326 * without requiring an integer pointer 327 */ 328 static inline int cp210x_set_config_single(struct usb_serial_port *port, 329 u8 request, unsigned int data) 330 { 331 return cp210x_set_config(port, request, &data, 2); 332 } 333 334 /* 335 * cp210x_quantise_baudrate 336 * Quantises the baud rate as per AN205 Table 1 337 */ 338 static unsigned int cp210x_quantise_baudrate(unsigned int baud) { 339 if (baud <= 56) baud = 0; 340 else if (baud <= 300) baud = 300; 341 else if (baud <= 600) baud = 600; 342 else if (baud <= 1200) baud = 1200; 343 else if (baud <= 1800) baud = 1800; 344 else if (baud <= 2400) baud = 2400; 345 else if (baud <= 4000) baud = 4000; 346 else if (baud <= 4803) baud = 4800; 347 else if (baud <= 7207) baud = 7200; 348 else if (baud <= 9612) baud = 9600; 349 else if (baud <= 14428) baud = 14400; 350 else if (baud <= 16062) baud = 16000; 351 else if (baud <= 19250) baud = 19200; 352 else if (baud <= 28912) baud = 28800; 353 else if (baud <= 38601) baud = 38400; 354 else if (baud <= 51558) baud = 51200; 355 else if (baud <= 56280) baud = 56000; 356 else if (baud <= 58053) baud = 57600; 357 else if (baud <= 64111) baud = 64000; 358 else if (baud <= 77608) baud = 76800; 359 else if (baud <= 117028) baud = 115200; 360 else if (baud <= 129347) baud = 128000; 361 else if (baud <= 156868) baud = 153600; 362 else if (baud <= 237832) baud = 230400; 363 else if (baud <= 254234) baud = 250000; 364 else if (baud <= 273066) baud = 256000; 365 else if (baud <= 491520) baud = 460800; 366 else if (baud <= 567138) baud = 500000; 367 else if (baud <= 670254) baud = 576000; 368 else if (baud <= 1053257) baud = 921600; 369 else if (baud <= 1474560) baud = 1228800; 370 else if (baud <= 2457600) baud = 1843200; 371 else baud = 3686400; 372 return baud; 373 } 374 375 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port) 376 { 377 struct usb_serial *serial = port->serial; 378 int result; 379 380 dbg("%s - port %d", __func__, port->number); 381 382 if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) { 383 dev_err(&port->dev, "%s - Unable to enable UART\n", 384 __func__); 385 return -EPROTO; 386 } 387 388 /* Start reading from the device */ 389 usb_fill_bulk_urb(port->read_urb, serial->dev, 390 usb_rcvbulkpipe(serial->dev, 391 port->bulk_in_endpointAddress), 392 port->read_urb->transfer_buffer, 393 port->read_urb->transfer_buffer_length, 394 serial->type->read_bulk_callback, 395 port); 396 result = usb_submit_urb(port->read_urb, GFP_KERNEL); 397 if (result) { 398 dev_err(&port->dev, "%s - failed resubmitting read urb, " 399 "error %d\n", __func__, result); 400 return result; 401 } 402 403 /* Configure the termios structure */ 404 cp210x_get_termios(tty, port); 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 void cp210x_dtr_rts(struct usb_serial_port *p, int on) 754 { 755 if (on) 756 cp210x_tiocmset_port(p, NULL, TIOCM_DTR|TIOCM_RTS, 0); 757 else 758 cp210x_tiocmset_port(p, NULL, 0, TIOCM_DTR|TIOCM_RTS); 759 } 760 761 static int cp210x_tiocmget (struct tty_struct *tty, struct file *file) 762 { 763 struct usb_serial_port *port = tty->driver_data; 764 unsigned int control; 765 int result; 766 767 dbg("%s - port %d", __func__, port->number); 768 769 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1); 770 771 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) 772 |((control & CONTROL_RTS) ? TIOCM_RTS : 0) 773 |((control & CONTROL_CTS) ? TIOCM_CTS : 0) 774 |((control & CONTROL_DSR) ? TIOCM_DSR : 0) 775 |((control & CONTROL_RING)? TIOCM_RI : 0) 776 |((control & CONTROL_DCD) ? TIOCM_CD : 0); 777 778 dbg("%s - control = 0x%.2x", __func__, control); 779 780 return result; 781 } 782 783 static int cp210x_carrier_raised(struct usb_serial_port *p) 784 { 785 unsigned int control; 786 cp210x_get_config(p, CP210X_GET_MDMSTS, &control, 1); 787 if (control & CONTROL_DCD) 788 return 1; 789 return 0; 790 } 791 792 static void cp210x_break_ctl (struct tty_struct *tty, int break_state) 793 { 794 struct usb_serial_port *port = tty->driver_data; 795 unsigned int state; 796 797 dbg("%s - port %d", __func__, port->number); 798 if (break_state == 0) 799 state = BREAK_OFF; 800 else 801 state = BREAK_ON; 802 dbg("%s - turning break %s", __func__, 803 state == BREAK_OFF ? "off" : "on"); 804 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2); 805 } 806 807 static int cp210x_startup(struct usb_serial *serial) 808 { 809 /* cp210x buffers behave strangely unless device is reset */ 810 usb_reset_device(serial->dev); 811 return 0; 812 } 813 814 static void cp210x_disconnect(struct usb_serial *serial) 815 { 816 int i; 817 818 dbg("%s", __func__); 819 820 /* Stop reads and writes on all ports */ 821 for (i = 0; i < serial->num_ports; ++i) 822 cp210x_cleanup(serial->port[i]); 823 } 824 825 static int __init cp210x_init(void) 826 { 827 int retval; 828 829 retval = usb_serial_register(&cp210x_device); 830 if (retval) 831 return retval; /* Failed to register */ 832 833 retval = usb_register(&cp210x_driver); 834 if (retval) { 835 /* Failed to register */ 836 usb_serial_deregister(&cp210x_device); 837 return retval; 838 } 839 840 /* Success */ 841 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 842 DRIVER_DESC "\n"); 843 return 0; 844 } 845 846 static void __exit cp210x_exit(void) 847 { 848 usb_deregister(&cp210x_driver); 849 usb_serial_deregister(&cp210x_device); 850 } 851 852 module_init(cp210x_init); 853 module_exit(cp210x_exit); 854 855 MODULE_DESCRIPTION(DRIVER_DESC); 856 MODULE_VERSION(DRIVER_VERSION); 857 MODULE_LICENSE("GPL"); 858 859 module_param(debug, bool, S_IRUGO | S_IWUSR); 860 MODULE_PARM_DESC(debug, "Enable verbose debugging messages"); 861