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_close(struct usb_serial_port *); 38 static void cp210x_get_termios(struct tty_struct *, 39 struct usb_serial_port *port); 40 static void cp210x_get_termios_port(struct usb_serial_port *port, 41 unsigned int *cflagp, unsigned int *baudp); 42 static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *, 43 struct ktermios*); 44 static int cp210x_tiocmget(struct tty_struct *, struct file *); 45 static int cp210x_tiocmset(struct tty_struct *, struct file *, 46 unsigned int, unsigned int); 47 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *, 48 unsigned int, unsigned int); 49 static void cp210x_break_ctl(struct tty_struct *, int); 50 static int cp210x_startup(struct usb_serial *); 51 static void cp210x_dtr_rts(struct usb_serial_port *p, int on); 52 static int cp210x_carrier_raised(struct usb_serial_port *p); 53 54 static int debug; 55 56 static const struct usb_device_id id_table[] = { 57 { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */ 58 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */ 59 { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */ 60 { USB_DEVICE(0x0489, 0xE003) }, /* 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(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */ 65 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */ 66 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */ 67 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */ 68 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */ 69 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */ 70 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */ 71 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */ 72 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */ 73 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */ 74 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */ 75 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */ 76 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */ 77 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */ 78 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */ 79 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */ 80 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */ 81 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */ 82 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */ 83 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */ 84 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */ 85 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */ 86 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */ 87 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */ 88 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */ 89 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */ 90 { USB_DEVICE(0x10C4, 0x8149) }, /* West Mountain Radio Computerized Battery Analyzer */ 91 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */ 92 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */ 93 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */ 94 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */ 95 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */ 96 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */ 97 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */ 98 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */ 99 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */ 100 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */ 101 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */ 102 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */ 103 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */ 104 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */ 105 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */ 106 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */ 107 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */ 108 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesys ETRX2USB */ 109 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */ 110 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */ 111 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */ 112 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */ 113 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */ 114 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */ 115 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */ 116 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ 117 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ 118 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */ 119 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */ 120 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */ 121 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */ 122 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */ 123 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ 124 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */ 125 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ 126 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */ 127 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ 128 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ 129 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */ 130 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */ 131 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */ 132 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */ 133 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */ 134 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */ 135 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */ 136 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */ 137 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */ 138 { } /* Terminating Entry */ 139 }; 140 141 MODULE_DEVICE_TABLE(usb, id_table); 142 143 static struct usb_driver cp210x_driver = { 144 .name = "cp210x", 145 .probe = usb_serial_probe, 146 .disconnect = usb_serial_disconnect, 147 .id_table = id_table, 148 .no_dynamic_id = 1, 149 }; 150 151 static struct usb_serial_driver cp210x_device = { 152 .driver = { 153 .owner = THIS_MODULE, 154 .name = "cp210x", 155 }, 156 .usb_driver = &cp210x_driver, 157 .id_table = id_table, 158 .num_ports = 1, 159 .bulk_in_size = 256, 160 .bulk_out_size = 256, 161 .open = cp210x_open, 162 .close = cp210x_close, 163 .break_ctl = cp210x_break_ctl, 164 .set_termios = cp210x_set_termios, 165 .tiocmget = cp210x_tiocmget, 166 .tiocmset = cp210x_tiocmset, 167 .attach = cp210x_startup, 168 .dtr_rts = cp210x_dtr_rts, 169 .carrier_raised = cp210x_carrier_raised 170 }; 171 172 /* Config request types */ 173 #define REQTYPE_HOST_TO_DEVICE 0x41 174 #define REQTYPE_DEVICE_TO_HOST 0xc1 175 176 /* Config request codes */ 177 #define CP210X_IFC_ENABLE 0x00 178 #define CP210X_SET_BAUDDIV 0x01 179 #define CP210X_GET_BAUDDIV 0x02 180 #define CP210X_SET_LINE_CTL 0x03 181 #define CP210X_GET_LINE_CTL 0x04 182 #define CP210X_SET_BREAK 0x05 183 #define CP210X_IMM_CHAR 0x06 184 #define CP210X_SET_MHS 0x07 185 #define CP210X_GET_MDMSTS 0x08 186 #define CP210X_SET_XON 0x09 187 #define CP210X_SET_XOFF 0x0A 188 #define CP210X_SET_EVENTMASK 0x0B 189 #define CP210X_GET_EVENTMASK 0x0C 190 #define CP210X_SET_CHAR 0x0D 191 #define CP210X_GET_CHARS 0x0E 192 #define CP210X_GET_PROPS 0x0F 193 #define CP210X_GET_COMM_STATUS 0x10 194 #define CP210X_RESET 0x11 195 #define CP210X_PURGE 0x12 196 #define CP210X_SET_FLOW 0x13 197 #define CP210X_GET_FLOW 0x14 198 #define CP210X_EMBED_EVENTS 0x15 199 #define CP210X_GET_EVENTSTATE 0x16 200 #define CP210X_SET_CHARS 0x19 201 202 /* CP210X_IFC_ENABLE */ 203 #define UART_ENABLE 0x0001 204 #define UART_DISABLE 0x0000 205 206 /* CP210X_(SET|GET)_BAUDDIV */ 207 #define BAUD_RATE_GEN_FREQ 0x384000 208 209 /* CP210X_(SET|GET)_LINE_CTL */ 210 #define BITS_DATA_MASK 0X0f00 211 #define BITS_DATA_5 0X0500 212 #define BITS_DATA_6 0X0600 213 #define BITS_DATA_7 0X0700 214 #define BITS_DATA_8 0X0800 215 #define BITS_DATA_9 0X0900 216 217 #define BITS_PARITY_MASK 0x00f0 218 #define BITS_PARITY_NONE 0x0000 219 #define BITS_PARITY_ODD 0x0010 220 #define BITS_PARITY_EVEN 0x0020 221 #define BITS_PARITY_MARK 0x0030 222 #define BITS_PARITY_SPACE 0x0040 223 224 #define BITS_STOP_MASK 0x000f 225 #define BITS_STOP_1 0x0000 226 #define BITS_STOP_1_5 0x0001 227 #define BITS_STOP_2 0x0002 228 229 /* CP210X_SET_BREAK */ 230 #define BREAK_ON 0x0001 231 #define BREAK_OFF 0x0000 232 233 /* CP210X_(SET_MHS|GET_MDMSTS) */ 234 #define CONTROL_DTR 0x0001 235 #define CONTROL_RTS 0x0002 236 #define CONTROL_CTS 0x0010 237 #define CONTROL_DSR 0x0020 238 #define CONTROL_RING 0x0040 239 #define CONTROL_DCD 0x0080 240 #define CONTROL_WRITE_DTR 0x0100 241 #define CONTROL_WRITE_RTS 0x0200 242 243 /* 244 * cp210x_get_config 245 * Reads from the CP210x configuration registers 246 * 'size' is specified in bytes. 247 * 'data' is a pointer to a pre-allocated array of integers large 248 * enough to hold 'size' bytes (with 4 bytes to each integer) 249 */ 250 static int cp210x_get_config(struct usb_serial_port *port, u8 request, 251 unsigned int *data, int size) 252 { 253 struct usb_serial *serial = port->serial; 254 __le32 *buf; 255 int result, i, length; 256 257 /* Number of integers required to contain the array */ 258 length = (((size - 1) | 3) + 1)/4; 259 260 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL); 261 if (!buf) { 262 dev_err(&port->dev, "%s - out of memory.\n", __func__); 263 return -ENOMEM; 264 } 265 266 /* Issue the request, attempting to read 'size' bytes */ 267 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 268 request, REQTYPE_DEVICE_TO_HOST, 0x0000, 269 0, buf, size, 300); 270 271 /* Convert data into an array of integers */ 272 for (i = 0; i < length; i++) 273 data[i] = le32_to_cpu(buf[i]); 274 275 kfree(buf); 276 277 if (result != size) { 278 dbg("%s - Unable to send config request, " 279 "request=0x%x size=%d result=%d\n", 280 __func__, request, size, result); 281 return -EPROTO; 282 } 283 284 return 0; 285 } 286 287 /* 288 * cp210x_set_config 289 * Writes to the CP210x configuration registers 290 * Values less than 16 bits wide are sent directly 291 * 'size' is specified in bytes. 292 */ 293 static int cp210x_set_config(struct usb_serial_port *port, u8 request, 294 unsigned int *data, int size) 295 { 296 struct usb_serial *serial = port->serial; 297 __le32 *buf; 298 int result, i, length; 299 300 /* Number of integers required to contain the array */ 301 length = (((size - 1) | 3) + 1)/4; 302 303 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL); 304 if (!buf) { 305 dev_err(&port->dev, "%s - out of memory.\n", 306 __func__); 307 return -ENOMEM; 308 } 309 310 /* Array of integers into bytes */ 311 for (i = 0; i < length; i++) 312 buf[i] = cpu_to_le32(data[i]); 313 314 if (size > 2) { 315 result = usb_control_msg(serial->dev, 316 usb_sndctrlpipe(serial->dev, 0), 317 request, REQTYPE_HOST_TO_DEVICE, 0x0000, 318 0, buf, size, 300); 319 } else { 320 result = usb_control_msg(serial->dev, 321 usb_sndctrlpipe(serial->dev, 0), 322 request, REQTYPE_HOST_TO_DEVICE, data[0], 323 0, NULL, 0, 300); 324 } 325 326 kfree(buf); 327 328 if ((size > 2 && result != size) || result < 0) { 329 dbg("%s - Unable to send request, " 330 "request=0x%x size=%d result=%d\n", 331 __func__, request, size, result); 332 return -EPROTO; 333 } 334 335 return 0; 336 } 337 338 /* 339 * cp210x_set_config_single 340 * Convenience function for calling cp210x_set_config on single data values 341 * without requiring an integer pointer 342 */ 343 static inline int cp210x_set_config_single(struct usb_serial_port *port, 344 u8 request, unsigned int data) 345 { 346 return cp210x_set_config(port, request, &data, 2); 347 } 348 349 /* 350 * cp210x_quantise_baudrate 351 * Quantises the baud rate as per AN205 Table 1 352 */ 353 static unsigned int cp210x_quantise_baudrate(unsigned int baud) { 354 if (baud <= 56) baud = 0; 355 else if (baud <= 300) baud = 300; 356 else if (baud <= 600) baud = 600; 357 else if (baud <= 1200) baud = 1200; 358 else if (baud <= 1800) baud = 1800; 359 else if (baud <= 2400) baud = 2400; 360 else if (baud <= 4000) baud = 4000; 361 else if (baud <= 4803) baud = 4800; 362 else if (baud <= 7207) baud = 7200; 363 else if (baud <= 9612) baud = 9600; 364 else if (baud <= 14428) baud = 14400; 365 else if (baud <= 16062) baud = 16000; 366 else if (baud <= 19250) baud = 19200; 367 else if (baud <= 28912) baud = 28800; 368 else if (baud <= 38601) baud = 38400; 369 else if (baud <= 51558) baud = 51200; 370 else if (baud <= 56280) baud = 56000; 371 else if (baud <= 58053) baud = 57600; 372 else if (baud <= 64111) baud = 64000; 373 else if (baud <= 77608) baud = 76800; 374 else if (baud <= 117028) baud = 115200; 375 else if (baud <= 129347) baud = 128000; 376 else if (baud <= 156868) baud = 153600; 377 else if (baud <= 237832) baud = 230400; 378 else if (baud <= 254234) baud = 250000; 379 else if (baud <= 273066) baud = 256000; 380 else if (baud <= 491520) baud = 460800; 381 else if (baud <= 567138) baud = 500000; 382 else if (baud <= 670254) baud = 576000; 383 else if (baud <= 1053257) baud = 921600; 384 else if (baud <= 1474560) baud = 1228800; 385 else if (baud <= 2457600) baud = 1843200; 386 else baud = 3686400; 387 return baud; 388 } 389 390 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port) 391 { 392 int result; 393 394 dbg("%s - port %d", __func__, port->number); 395 396 if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) { 397 dev_err(&port->dev, "%s - Unable to enable UART\n", 398 __func__); 399 return -EPROTO; 400 } 401 402 result = usb_serial_generic_open(tty, port); 403 if (result) 404 return result; 405 406 /* Configure the termios structure */ 407 cp210x_get_termios(tty, port); 408 return 0; 409 } 410 411 static void cp210x_close(struct usb_serial_port *port) 412 { 413 dbg("%s - port %d", __func__, port->number); 414 415 usb_serial_generic_close(port); 416 417 mutex_lock(&port->serial->disc_mutex); 418 if (!port->serial->disconnected) 419 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE); 420 mutex_unlock(&port->serial->disc_mutex); 421 } 422 423 /* 424 * cp210x_get_termios 425 * Reads the baud rate, data bits, parity, stop bits and flow control mode 426 * from the device, corrects any unsupported values, and configures the 427 * termios structure to reflect the state of the device 428 */ 429 static void cp210x_get_termios(struct tty_struct *tty, 430 struct usb_serial_port *port) 431 { 432 unsigned int baud; 433 434 if (tty) { 435 cp210x_get_termios_port(tty->driver_data, 436 &tty->termios->c_cflag, &baud); 437 tty_encode_baud_rate(tty, baud, baud); 438 } 439 440 else { 441 unsigned int cflag; 442 cflag = 0; 443 cp210x_get_termios_port(port, &cflag, &baud); 444 } 445 } 446 447 /* 448 * cp210x_get_termios_port 449 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port. 450 */ 451 static void cp210x_get_termios_port(struct usb_serial_port *port, 452 unsigned int *cflagp, unsigned int *baudp) 453 { 454 unsigned int cflag, modem_ctl[4]; 455 unsigned int baud; 456 unsigned int bits; 457 458 dbg("%s - port %d", __func__, port->number); 459 460 cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2); 461 /* Convert to baudrate */ 462 if (baud) 463 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud); 464 465 dbg("%s - baud rate = %d", __func__, baud); 466 *baudp = baud; 467 468 cflag = *cflagp; 469 470 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 471 cflag &= ~CSIZE; 472 switch (bits & BITS_DATA_MASK) { 473 case BITS_DATA_5: 474 dbg("%s - data bits = 5", __func__); 475 cflag |= CS5; 476 break; 477 case BITS_DATA_6: 478 dbg("%s - data bits = 6", __func__); 479 cflag |= CS6; 480 break; 481 case BITS_DATA_7: 482 dbg("%s - data bits = 7", __func__); 483 cflag |= CS7; 484 break; 485 case BITS_DATA_8: 486 dbg("%s - data bits = 8", __func__); 487 cflag |= CS8; 488 break; 489 case BITS_DATA_9: 490 dbg("%s - data bits = 9 (not supported, using 8 data bits)", 491 __func__); 492 cflag |= CS8; 493 bits &= ~BITS_DATA_MASK; 494 bits |= BITS_DATA_8; 495 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 496 break; 497 default: 498 dbg("%s - Unknown number of data bits, using 8", __func__); 499 cflag |= CS8; 500 bits &= ~BITS_DATA_MASK; 501 bits |= BITS_DATA_8; 502 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 503 break; 504 } 505 506 switch (bits & BITS_PARITY_MASK) { 507 case BITS_PARITY_NONE: 508 dbg("%s - parity = NONE", __func__); 509 cflag &= ~PARENB; 510 break; 511 case BITS_PARITY_ODD: 512 dbg("%s - parity = ODD", __func__); 513 cflag |= (PARENB|PARODD); 514 break; 515 case BITS_PARITY_EVEN: 516 dbg("%s - parity = EVEN", __func__); 517 cflag &= ~PARODD; 518 cflag |= PARENB; 519 break; 520 case BITS_PARITY_MARK: 521 dbg("%s - parity = MARK (not supported, disabling parity)", 522 __func__); 523 cflag &= ~PARENB; 524 bits &= ~BITS_PARITY_MASK; 525 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 526 break; 527 case BITS_PARITY_SPACE: 528 dbg("%s - parity = SPACE (not supported, disabling parity)", 529 __func__); 530 cflag &= ~PARENB; 531 bits &= ~BITS_PARITY_MASK; 532 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 533 break; 534 default: 535 dbg("%s - Unknown parity mode, disabling parity", __func__); 536 cflag &= ~PARENB; 537 bits &= ~BITS_PARITY_MASK; 538 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 539 break; 540 } 541 542 cflag &= ~CSTOPB; 543 switch (bits & BITS_STOP_MASK) { 544 case BITS_STOP_1: 545 dbg("%s - stop bits = 1", __func__); 546 break; 547 case BITS_STOP_1_5: 548 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)", 549 __func__); 550 bits &= ~BITS_STOP_MASK; 551 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 552 break; 553 case BITS_STOP_2: 554 dbg("%s - stop bits = 2", __func__); 555 cflag |= CSTOPB; 556 break; 557 default: 558 dbg("%s - Unknown number of stop bits, using 1 stop bit", 559 __func__); 560 bits &= ~BITS_STOP_MASK; 561 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 562 break; 563 } 564 565 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 566 if (modem_ctl[0] & 0x0008) { 567 dbg("%s - flow control = CRTSCTS", __func__); 568 cflag |= CRTSCTS; 569 } else { 570 dbg("%s - flow control = NONE", __func__); 571 cflag &= ~CRTSCTS; 572 } 573 574 *cflagp = cflag; 575 } 576 577 static void cp210x_set_termios(struct tty_struct *tty, 578 struct usb_serial_port *port, struct ktermios *old_termios) 579 { 580 unsigned int cflag, old_cflag; 581 unsigned int baud = 0, bits; 582 unsigned int modem_ctl[4]; 583 584 dbg("%s - port %d", __func__, port->number); 585 586 if (!tty) 587 return; 588 589 tty->termios->c_cflag &= ~CMSPAR; 590 cflag = tty->termios->c_cflag; 591 old_cflag = old_termios->c_cflag; 592 baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty)); 593 594 /* If the baud rate is to be updated*/ 595 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) { 596 dbg("%s - Setting baud rate to %d baud", __func__, 597 baud); 598 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV, 599 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) { 600 dbg("Baud rate requested not supported by device"); 601 baud = tty_termios_baud_rate(old_termios); 602 } 603 } 604 /* Report back the resulting baud rate */ 605 tty_encode_baud_rate(tty, baud, baud); 606 607 /* If the number of data bits is to be updated */ 608 if ((cflag & CSIZE) != (old_cflag & CSIZE)) { 609 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 610 bits &= ~BITS_DATA_MASK; 611 switch (cflag & CSIZE) { 612 case CS5: 613 bits |= BITS_DATA_5; 614 dbg("%s - data bits = 5", __func__); 615 break; 616 case CS6: 617 bits |= BITS_DATA_6; 618 dbg("%s - data bits = 6", __func__); 619 break; 620 case CS7: 621 bits |= BITS_DATA_7; 622 dbg("%s - data bits = 7", __func__); 623 break; 624 case CS8: 625 bits |= BITS_DATA_8; 626 dbg("%s - data bits = 8", __func__); 627 break; 628 /*case CS9: 629 bits |= BITS_DATA_9; 630 dbg("%s - data bits = 9", __func__); 631 break;*/ 632 default: 633 dbg("cp210x driver does not " 634 "support the number of bits requested," 635 " using 8 bit mode\n"); 636 bits |= BITS_DATA_8; 637 break; 638 } 639 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 640 dbg("Number of data bits requested " 641 "not supported by device\n"); 642 } 643 644 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) { 645 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 646 bits &= ~BITS_PARITY_MASK; 647 if (cflag & PARENB) { 648 if (cflag & PARODD) { 649 bits |= BITS_PARITY_ODD; 650 dbg("%s - parity = ODD", __func__); 651 } else { 652 bits |= BITS_PARITY_EVEN; 653 dbg("%s - parity = EVEN", __func__); 654 } 655 } 656 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 657 dbg("Parity mode not supported " 658 "by device\n"); 659 } 660 661 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { 662 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 663 bits &= ~BITS_STOP_MASK; 664 if (cflag & CSTOPB) { 665 bits |= BITS_STOP_2; 666 dbg("%s - stop bits = 2", __func__); 667 } else { 668 bits |= BITS_STOP_1; 669 dbg("%s - stop bits = 1", __func__); 670 } 671 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 672 dbg("Number of stop bits requested " 673 "not supported by device\n"); 674 } 675 676 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { 677 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 678 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", 679 __func__, modem_ctl[0], modem_ctl[1], 680 modem_ctl[2], modem_ctl[3]); 681 682 if (cflag & CRTSCTS) { 683 modem_ctl[0] &= ~0x7B; 684 modem_ctl[0] |= 0x09; 685 modem_ctl[1] = 0x80; 686 dbg("%s - flow control = CRTSCTS", __func__); 687 } else { 688 modem_ctl[0] &= ~0x7B; 689 modem_ctl[0] |= 0x01; 690 modem_ctl[1] |= 0x40; 691 dbg("%s - flow control = NONE", __func__); 692 } 693 694 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", 695 __func__, modem_ctl[0], modem_ctl[1], 696 modem_ctl[2], modem_ctl[3]); 697 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16); 698 } 699 700 } 701 702 static int cp210x_tiocmset (struct tty_struct *tty, struct file *file, 703 unsigned int set, unsigned int clear) 704 { 705 struct usb_serial_port *port = tty->driver_data; 706 return cp210x_tiocmset_port(port, file, set, clear); 707 } 708 709 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *file, 710 unsigned int set, unsigned int clear) 711 { 712 unsigned int control = 0; 713 714 dbg("%s - port %d", __func__, port->number); 715 716 if (set & TIOCM_RTS) { 717 control |= CONTROL_RTS; 718 control |= CONTROL_WRITE_RTS; 719 } 720 if (set & TIOCM_DTR) { 721 control |= CONTROL_DTR; 722 control |= CONTROL_WRITE_DTR; 723 } 724 if (clear & TIOCM_RTS) { 725 control &= ~CONTROL_RTS; 726 control |= CONTROL_WRITE_RTS; 727 } 728 if (clear & TIOCM_DTR) { 729 control &= ~CONTROL_DTR; 730 control |= CONTROL_WRITE_DTR; 731 } 732 733 dbg("%s - control = 0x%.4x", __func__, control); 734 735 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2); 736 } 737 738 static void cp210x_dtr_rts(struct usb_serial_port *p, int on) 739 { 740 if (on) 741 cp210x_tiocmset_port(p, NULL, TIOCM_DTR|TIOCM_RTS, 0); 742 else 743 cp210x_tiocmset_port(p, NULL, 0, TIOCM_DTR|TIOCM_RTS); 744 } 745 746 static int cp210x_tiocmget (struct tty_struct *tty, struct file *file) 747 { 748 struct usb_serial_port *port = tty->driver_data; 749 unsigned int control; 750 int result; 751 752 dbg("%s - port %d", __func__, port->number); 753 754 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1); 755 756 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) 757 |((control & CONTROL_RTS) ? TIOCM_RTS : 0) 758 |((control & CONTROL_CTS) ? TIOCM_CTS : 0) 759 |((control & CONTROL_DSR) ? TIOCM_DSR : 0) 760 |((control & CONTROL_RING)? TIOCM_RI : 0) 761 |((control & CONTROL_DCD) ? TIOCM_CD : 0); 762 763 dbg("%s - control = 0x%.2x", __func__, control); 764 765 return result; 766 } 767 768 static int cp210x_carrier_raised(struct usb_serial_port *p) 769 { 770 unsigned int control; 771 cp210x_get_config(p, CP210X_GET_MDMSTS, &control, 1); 772 if (control & CONTROL_DCD) 773 return 1; 774 return 0; 775 } 776 777 static void cp210x_break_ctl (struct tty_struct *tty, int break_state) 778 { 779 struct usb_serial_port *port = tty->driver_data; 780 unsigned int state; 781 782 dbg("%s - port %d", __func__, port->number); 783 if (break_state == 0) 784 state = BREAK_OFF; 785 else 786 state = BREAK_ON; 787 dbg("%s - turning break %s", __func__, 788 state == BREAK_OFF ? "off" : "on"); 789 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2); 790 } 791 792 static int cp210x_startup(struct usb_serial *serial) 793 { 794 /* cp210x buffers behave strangely unless device is reset */ 795 usb_reset_device(serial->dev); 796 return 0; 797 } 798 799 static int __init cp210x_init(void) 800 { 801 int retval; 802 803 retval = usb_serial_register(&cp210x_device); 804 if (retval) 805 return retval; /* Failed to register */ 806 807 retval = usb_register(&cp210x_driver); 808 if (retval) { 809 /* Failed to register */ 810 usb_serial_deregister(&cp210x_device); 811 return retval; 812 } 813 814 /* Success */ 815 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 816 DRIVER_DESC "\n"); 817 return 0; 818 } 819 820 static void __exit cp210x_exit(void) 821 { 822 usb_deregister(&cp210x_driver); 823 usb_serial_deregister(&cp210x_device); 824 } 825 826 module_init(cp210x_init); 827 module_exit(cp210x_exit); 828 829 MODULE_DESCRIPTION(DRIVER_DESC); 830 MODULE_VERSION(DRIVER_VERSION); 831 MODULE_LICENSE("GPL"); 832 833 module_param(debug, bool, S_IRUGO | S_IWUSR); 834 MODULE_PARM_DESC(debug, "Enable verbose debugging messages"); 835