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_change_speed(struct tty_struct *, struct usb_serial_port *, 43 struct ktermios *); 44 static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *, 45 struct ktermios*); 46 static int cp210x_tiocmget(struct tty_struct *); 47 static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int); 48 static int cp210x_tiocmset_port(struct usb_serial_port *port, 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_release(struct usb_serial *); 53 static void cp210x_dtr_rts(struct usb_serial_port *p, int on); 54 55 static bool debug; 56 57 static const struct usb_device_id id_table[] = { 58 { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */ 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(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */ 62 { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */ 63 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */ 64 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */ 65 { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */ 66 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */ 67 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */ 68 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */ 69 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */ 70 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */ 71 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */ 72 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */ 73 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */ 74 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */ 75 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */ 76 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */ 77 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */ 78 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */ 79 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */ 80 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */ 81 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */ 82 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */ 83 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */ 84 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */ 85 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */ 86 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */ 87 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */ 88 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */ 89 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */ 90 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */ 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, 0x81A9) }, /* Multiplex RC Interface */ 99 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */ 100 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */ 101 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */ 102 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */ 103 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */ 104 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */ 105 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */ 106 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */ 107 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */ 108 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */ 109 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */ 110 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */ 111 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */ 112 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */ 113 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */ 114 { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */ 115 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */ 116 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */ 117 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */ 118 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */ 119 { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */ 120 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */ 121 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */ 122 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */ 123 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ 124 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ 125 { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */ 126 { USB_DEVICE(0x10C4, 0xEA80) }, /* Silicon Labs factory default */ 127 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */ 128 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */ 129 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */ 130 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */ 131 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */ 132 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ 133 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */ 134 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ 135 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */ 136 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ 137 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ 138 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */ 139 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */ 140 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */ 141 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */ 142 { USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */ 143 { USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */ 144 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */ 145 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */ 146 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */ 147 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */ 148 { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */ 149 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */ 150 { } /* Terminating Entry */ 151 }; 152 153 MODULE_DEVICE_TABLE(usb, id_table); 154 155 struct cp210x_port_private { 156 __u8 bInterfaceNumber; 157 }; 158 159 static struct usb_serial_driver cp210x_device = { 160 .driver = { 161 .owner = THIS_MODULE, 162 .name = "cp210x", 163 }, 164 .id_table = id_table, 165 .num_ports = 1, 166 .bulk_in_size = 256, 167 .bulk_out_size = 256, 168 .open = cp210x_open, 169 .close = cp210x_close, 170 .break_ctl = cp210x_break_ctl, 171 .set_termios = cp210x_set_termios, 172 .tiocmget = cp210x_tiocmget, 173 .tiocmset = cp210x_tiocmset, 174 .attach = cp210x_startup, 175 .release = cp210x_release, 176 .dtr_rts = cp210x_dtr_rts 177 }; 178 179 static struct usb_serial_driver * const serial_drivers[] = { 180 &cp210x_device, NULL 181 }; 182 183 /* Config request types */ 184 #define REQTYPE_HOST_TO_INTERFACE 0x41 185 #define REQTYPE_INTERFACE_TO_HOST 0xc1 186 #define REQTYPE_HOST_TO_DEVICE 0x40 187 #define REQTYPE_DEVICE_TO_HOST 0xc0 188 189 /* Config request codes */ 190 #define CP210X_IFC_ENABLE 0x00 191 #define CP210X_SET_BAUDDIV 0x01 192 #define CP210X_GET_BAUDDIV 0x02 193 #define CP210X_SET_LINE_CTL 0x03 194 #define CP210X_GET_LINE_CTL 0x04 195 #define CP210X_SET_BREAK 0x05 196 #define CP210X_IMM_CHAR 0x06 197 #define CP210X_SET_MHS 0x07 198 #define CP210X_GET_MDMSTS 0x08 199 #define CP210X_SET_XON 0x09 200 #define CP210X_SET_XOFF 0x0A 201 #define CP210X_SET_EVENTMASK 0x0B 202 #define CP210X_GET_EVENTMASK 0x0C 203 #define CP210X_SET_CHAR 0x0D 204 #define CP210X_GET_CHARS 0x0E 205 #define CP210X_GET_PROPS 0x0F 206 #define CP210X_GET_COMM_STATUS 0x10 207 #define CP210X_RESET 0x11 208 #define CP210X_PURGE 0x12 209 #define CP210X_SET_FLOW 0x13 210 #define CP210X_GET_FLOW 0x14 211 #define CP210X_EMBED_EVENTS 0x15 212 #define CP210X_GET_EVENTSTATE 0x16 213 #define CP210X_SET_CHARS 0x19 214 #define CP210X_GET_BAUDRATE 0x1D 215 #define CP210X_SET_BAUDRATE 0x1E 216 217 /* CP210X_IFC_ENABLE */ 218 #define UART_ENABLE 0x0001 219 #define UART_DISABLE 0x0000 220 221 /* CP210X_(SET|GET)_BAUDDIV */ 222 #define BAUD_RATE_GEN_FREQ 0x384000 223 224 /* CP210X_(SET|GET)_LINE_CTL */ 225 #define BITS_DATA_MASK 0X0f00 226 #define BITS_DATA_5 0X0500 227 #define BITS_DATA_6 0X0600 228 #define BITS_DATA_7 0X0700 229 #define BITS_DATA_8 0X0800 230 #define BITS_DATA_9 0X0900 231 232 #define BITS_PARITY_MASK 0x00f0 233 #define BITS_PARITY_NONE 0x0000 234 #define BITS_PARITY_ODD 0x0010 235 #define BITS_PARITY_EVEN 0x0020 236 #define BITS_PARITY_MARK 0x0030 237 #define BITS_PARITY_SPACE 0x0040 238 239 #define BITS_STOP_MASK 0x000f 240 #define BITS_STOP_1 0x0000 241 #define BITS_STOP_1_5 0x0001 242 #define BITS_STOP_2 0x0002 243 244 /* CP210X_SET_BREAK */ 245 #define BREAK_ON 0x0001 246 #define BREAK_OFF 0x0000 247 248 /* CP210X_(SET_MHS|GET_MDMSTS) */ 249 #define CONTROL_DTR 0x0001 250 #define CONTROL_RTS 0x0002 251 #define CONTROL_CTS 0x0010 252 #define CONTROL_DSR 0x0020 253 #define CONTROL_RING 0x0040 254 #define CONTROL_DCD 0x0080 255 #define CONTROL_WRITE_DTR 0x0100 256 #define CONTROL_WRITE_RTS 0x0200 257 258 /* 259 * cp210x_get_config 260 * Reads from the CP210x configuration registers 261 * 'size' is specified in bytes. 262 * 'data' is a pointer to a pre-allocated array of integers large 263 * enough to hold 'size' bytes (with 4 bytes to each integer) 264 */ 265 static int cp210x_get_config(struct usb_serial_port *port, u8 request, 266 unsigned int *data, int size) 267 { 268 struct usb_serial *serial = port->serial; 269 struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); 270 __le32 *buf; 271 int result, i, length; 272 273 /* Number of integers required to contain the array */ 274 length = (((size - 1) | 3) + 1)/4; 275 276 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL); 277 if (!buf) { 278 dev_err(&port->dev, "%s - out of memory.\n", __func__); 279 return -ENOMEM; 280 } 281 282 /* Issue the request, attempting to read 'size' bytes */ 283 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 284 request, REQTYPE_INTERFACE_TO_HOST, 0x0000, 285 port_priv->bInterfaceNumber, buf, size, 286 USB_CTRL_GET_TIMEOUT); 287 288 /* Convert data into an array of integers */ 289 for (i = 0; i < length; i++) 290 data[i] = le32_to_cpu(buf[i]); 291 292 kfree(buf); 293 294 if (result != size) { 295 dbg("%s - Unable to send config request, " 296 "request=0x%x size=%d result=%d", 297 __func__, request, size, result); 298 if (result > 0) 299 result = -EPROTO; 300 301 return result; 302 } 303 304 return 0; 305 } 306 307 /* 308 * cp210x_set_config 309 * Writes to the CP210x configuration registers 310 * Values less than 16 bits wide are sent directly 311 * 'size' is specified in bytes. 312 */ 313 static int cp210x_set_config(struct usb_serial_port *port, u8 request, 314 unsigned int *data, int size) 315 { 316 struct usb_serial *serial = port->serial; 317 struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); 318 __le32 *buf; 319 int result, i, length; 320 321 /* Number of integers required to contain the array */ 322 length = (((size - 1) | 3) + 1)/4; 323 324 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL); 325 if (!buf) { 326 dev_err(&port->dev, "%s - out of memory.\n", 327 __func__); 328 return -ENOMEM; 329 } 330 331 /* Array of integers into bytes */ 332 for (i = 0; i < length; i++) 333 buf[i] = cpu_to_le32(data[i]); 334 335 if (size > 2) { 336 result = usb_control_msg(serial->dev, 337 usb_sndctrlpipe(serial->dev, 0), 338 request, REQTYPE_HOST_TO_INTERFACE, 0x0000, 339 port_priv->bInterfaceNumber, buf, size, 340 USB_CTRL_SET_TIMEOUT); 341 } else { 342 result = usb_control_msg(serial->dev, 343 usb_sndctrlpipe(serial->dev, 0), 344 request, REQTYPE_HOST_TO_INTERFACE, data[0], 345 port_priv->bInterfaceNumber, NULL, 0, 346 USB_CTRL_SET_TIMEOUT); 347 } 348 349 kfree(buf); 350 351 if ((size > 2 && result != size) || result < 0) { 352 dbg("%s - Unable to send request, " 353 "request=0x%x size=%d result=%d", 354 __func__, request, size, result); 355 if (result > 0) 356 result = -EPROTO; 357 358 return result; 359 } 360 361 return 0; 362 } 363 364 /* 365 * cp210x_set_config_single 366 * Convenience function for calling cp210x_set_config on single data values 367 * without requiring an integer pointer 368 */ 369 static inline int cp210x_set_config_single(struct usb_serial_port *port, 370 u8 request, unsigned int data) 371 { 372 return cp210x_set_config(port, request, &data, 2); 373 } 374 375 /* 376 * cp210x_quantise_baudrate 377 * Quantises the baud rate as per AN205 Table 1 378 */ 379 static unsigned int cp210x_quantise_baudrate(unsigned int baud) { 380 if (baud <= 300) 381 baud = 300; 382 else if (baud <= 600) baud = 600; 383 else if (baud <= 1200) baud = 1200; 384 else if (baud <= 1800) baud = 1800; 385 else if (baud <= 2400) baud = 2400; 386 else if (baud <= 4000) baud = 4000; 387 else if (baud <= 4803) baud = 4800; 388 else if (baud <= 7207) baud = 7200; 389 else if (baud <= 9612) baud = 9600; 390 else if (baud <= 14428) baud = 14400; 391 else if (baud <= 16062) baud = 16000; 392 else if (baud <= 19250) baud = 19200; 393 else if (baud <= 28912) baud = 28800; 394 else if (baud <= 38601) baud = 38400; 395 else if (baud <= 51558) baud = 51200; 396 else if (baud <= 56280) baud = 56000; 397 else if (baud <= 58053) baud = 57600; 398 else if (baud <= 64111) baud = 64000; 399 else if (baud <= 77608) baud = 76800; 400 else if (baud <= 117028) baud = 115200; 401 else if (baud <= 129347) baud = 128000; 402 else if (baud <= 156868) baud = 153600; 403 else if (baud <= 237832) baud = 230400; 404 else if (baud <= 254234) baud = 250000; 405 else if (baud <= 273066) baud = 256000; 406 else if (baud <= 491520) baud = 460800; 407 else if (baud <= 567138) baud = 500000; 408 else if (baud <= 670254) baud = 576000; 409 else if (baud < 1000000) 410 baud = 921600; 411 else if (baud > 2000000) 412 baud = 2000000; 413 return baud; 414 } 415 416 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port) 417 { 418 int result; 419 420 result = cp210x_set_config_single(port, CP210X_IFC_ENABLE, 421 UART_ENABLE); 422 if (result) { 423 dev_err(&port->dev, "%s - Unable to enable UART\n", __func__); 424 return result; 425 } 426 427 /* Configure the termios structure */ 428 cp210x_get_termios(tty, port); 429 430 /* The baud rate must be initialised on cp2104 */ 431 if (tty) 432 cp210x_change_speed(tty, port, NULL); 433 434 return usb_serial_generic_open(tty, port); 435 } 436 437 static void cp210x_close(struct usb_serial_port *port) 438 { 439 usb_serial_generic_close(port); 440 441 mutex_lock(&port->serial->disc_mutex); 442 if (!port->serial->disconnected) 443 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE); 444 mutex_unlock(&port->serial->disc_mutex); 445 } 446 447 /* 448 * cp210x_get_termios 449 * Reads the baud rate, data bits, parity, stop bits and flow control mode 450 * from the device, corrects any unsupported values, and configures the 451 * termios structure to reflect the state of the device 452 */ 453 static void cp210x_get_termios(struct tty_struct *tty, 454 struct usb_serial_port *port) 455 { 456 unsigned int baud; 457 458 if (tty) { 459 cp210x_get_termios_port(tty->driver_data, 460 &tty->termios->c_cflag, &baud); 461 tty_encode_baud_rate(tty, baud, baud); 462 } 463 464 else { 465 unsigned int cflag; 466 cflag = 0; 467 cp210x_get_termios_port(port, &cflag, &baud); 468 } 469 } 470 471 /* 472 * cp210x_get_termios_port 473 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port. 474 */ 475 static void cp210x_get_termios_port(struct usb_serial_port *port, 476 unsigned int *cflagp, unsigned int *baudp) 477 { 478 unsigned int cflag, modem_ctl[4]; 479 unsigned int baud; 480 unsigned int bits; 481 482 cp210x_get_config(port, CP210X_GET_BAUDRATE, &baud, 4); 483 484 dbg("%s - baud rate = %d", __func__, baud); 485 *baudp = baud; 486 487 cflag = *cflagp; 488 489 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 490 cflag &= ~CSIZE; 491 switch (bits & BITS_DATA_MASK) { 492 case BITS_DATA_5: 493 dbg("%s - data bits = 5", __func__); 494 cflag |= CS5; 495 break; 496 case BITS_DATA_6: 497 dbg("%s - data bits = 6", __func__); 498 cflag |= CS6; 499 break; 500 case BITS_DATA_7: 501 dbg("%s - data bits = 7", __func__); 502 cflag |= CS7; 503 break; 504 case BITS_DATA_8: 505 dbg("%s - data bits = 8", __func__); 506 cflag |= CS8; 507 break; 508 case BITS_DATA_9: 509 dbg("%s - data bits = 9 (not supported, using 8 data bits)", 510 __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 default: 517 dbg("%s - Unknown number of data bits, using 8", __func__); 518 cflag |= CS8; 519 bits &= ~BITS_DATA_MASK; 520 bits |= BITS_DATA_8; 521 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 522 break; 523 } 524 525 switch (bits & BITS_PARITY_MASK) { 526 case BITS_PARITY_NONE: 527 dbg("%s - parity = NONE", __func__); 528 cflag &= ~PARENB; 529 break; 530 case BITS_PARITY_ODD: 531 dbg("%s - parity = ODD", __func__); 532 cflag |= (PARENB|PARODD); 533 break; 534 case BITS_PARITY_EVEN: 535 dbg("%s - parity = EVEN", __func__); 536 cflag &= ~PARODD; 537 cflag |= PARENB; 538 break; 539 case BITS_PARITY_MARK: 540 dbg("%s - parity = MARK", __func__); 541 cflag |= (PARENB|PARODD|CMSPAR); 542 break; 543 case BITS_PARITY_SPACE: 544 dbg("%s - parity = SPACE", __func__); 545 cflag &= ~PARODD; 546 cflag |= (PARENB|CMSPAR); 547 break; 548 default: 549 dbg("%s - Unknown parity mode, disabling parity", __func__); 550 cflag &= ~PARENB; 551 bits &= ~BITS_PARITY_MASK; 552 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 553 break; 554 } 555 556 cflag &= ~CSTOPB; 557 switch (bits & BITS_STOP_MASK) { 558 case BITS_STOP_1: 559 dbg("%s - stop bits = 1", __func__); 560 break; 561 case BITS_STOP_1_5: 562 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)", 563 __func__); 564 bits &= ~BITS_STOP_MASK; 565 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 566 break; 567 case BITS_STOP_2: 568 dbg("%s - stop bits = 2", __func__); 569 cflag |= CSTOPB; 570 break; 571 default: 572 dbg("%s - Unknown number of stop bits, using 1 stop bit", 573 __func__); 574 bits &= ~BITS_STOP_MASK; 575 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 576 break; 577 } 578 579 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 580 if (modem_ctl[0] & 0x0008) { 581 dbg("%s - flow control = CRTSCTS", __func__); 582 cflag |= CRTSCTS; 583 } else { 584 dbg("%s - flow control = NONE", __func__); 585 cflag &= ~CRTSCTS; 586 } 587 588 *cflagp = cflag; 589 } 590 591 /* 592 * CP2101 supports the following baud rates: 593 * 594 * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800, 595 * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600 596 * 597 * CP2102 and CP2103 support the following additional rates: 598 * 599 * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000, 600 * 576000 601 * 602 * The device will map a requested rate to a supported one, but the result 603 * of requests for rates greater than 1053257 is undefined (see AN205). 604 * 605 * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud, 606 * respectively, with an error less than 1%. The actual rates are determined 607 * by 608 * 609 * div = round(freq / (2 x prescale x request)) 610 * actual = freq / (2 x prescale x div) 611 * 612 * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps 613 * or 1 otherwise. 614 * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1 615 * otherwise. 616 */ 617 static void cp210x_change_speed(struct tty_struct *tty, 618 struct usb_serial_port *port, struct ktermios *old_termios) 619 { 620 u32 baud; 621 622 baud = tty->termios->c_ospeed; 623 624 /* This maps the requested rate to a rate valid on cp2102 or cp2103, 625 * or to an arbitrary rate in [1M,2M]. 626 * 627 * NOTE: B0 is not implemented. 628 */ 629 baud = cp210x_quantise_baudrate(baud); 630 631 dbg("%s - setting baud rate to %u", __func__, baud); 632 if (cp210x_set_config(port, CP210X_SET_BAUDRATE, &baud, 633 sizeof(baud))) { 634 dev_warn(&port->dev, "failed to set baud rate to %u\n", baud); 635 if (old_termios) 636 baud = old_termios->c_ospeed; 637 else 638 baud = 9600; 639 } 640 641 tty_encode_baud_rate(tty, baud, baud); 642 } 643 644 static void cp210x_set_termios(struct tty_struct *tty, 645 struct usb_serial_port *port, struct ktermios *old_termios) 646 { 647 unsigned int cflag, old_cflag; 648 unsigned int bits; 649 unsigned int modem_ctl[4]; 650 651 dbg("%s - port %d", __func__, port->number); 652 653 if (!tty) 654 return; 655 656 cflag = tty->termios->c_cflag; 657 old_cflag = old_termios->c_cflag; 658 659 if (tty->termios->c_ospeed != old_termios->c_ospeed) 660 cp210x_change_speed(tty, port, old_termios); 661 662 /* If the number of data bits is to be updated */ 663 if ((cflag & CSIZE) != (old_cflag & CSIZE)) { 664 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 665 bits &= ~BITS_DATA_MASK; 666 switch (cflag & CSIZE) { 667 case CS5: 668 bits |= BITS_DATA_5; 669 dbg("%s - data bits = 5", __func__); 670 break; 671 case CS6: 672 bits |= BITS_DATA_6; 673 dbg("%s - data bits = 6", __func__); 674 break; 675 case CS7: 676 bits |= BITS_DATA_7; 677 dbg("%s - data bits = 7", __func__); 678 break; 679 case CS8: 680 bits |= BITS_DATA_8; 681 dbg("%s - data bits = 8", __func__); 682 break; 683 /*case CS9: 684 bits |= BITS_DATA_9; 685 dbg("%s - data bits = 9", __func__); 686 break;*/ 687 default: 688 dbg("cp210x driver does not " 689 "support the number of bits requested," 690 " using 8 bit mode"); 691 bits |= BITS_DATA_8; 692 break; 693 } 694 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 695 dbg("Number of data bits requested " 696 "not supported by device"); 697 } 698 699 if ((cflag & (PARENB|PARODD|CMSPAR)) != 700 (old_cflag & (PARENB|PARODD|CMSPAR))) { 701 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 702 bits &= ~BITS_PARITY_MASK; 703 if (cflag & PARENB) { 704 if (cflag & CMSPAR) { 705 if (cflag & PARODD) { 706 bits |= BITS_PARITY_MARK; 707 dbg("%s - parity = MARK", __func__); 708 } else { 709 bits |= BITS_PARITY_SPACE; 710 dbg("%s - parity = SPACE", __func__); 711 } 712 } else { 713 if (cflag & PARODD) { 714 bits |= BITS_PARITY_ODD; 715 dbg("%s - parity = ODD", __func__); 716 } else { 717 bits |= BITS_PARITY_EVEN; 718 dbg("%s - parity = EVEN", __func__); 719 } 720 } 721 } 722 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 723 dbg("Parity mode not supported by device"); 724 } 725 726 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { 727 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 728 bits &= ~BITS_STOP_MASK; 729 if (cflag & CSTOPB) { 730 bits |= BITS_STOP_2; 731 dbg("%s - stop bits = 2", __func__); 732 } else { 733 bits |= BITS_STOP_1; 734 dbg("%s - stop bits = 1", __func__); 735 } 736 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 737 dbg("Number of stop bits requested " 738 "not supported by device"); 739 } 740 741 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { 742 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 743 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", 744 __func__, modem_ctl[0], modem_ctl[1], 745 modem_ctl[2], modem_ctl[3]); 746 747 if (cflag & CRTSCTS) { 748 modem_ctl[0] &= ~0x7B; 749 modem_ctl[0] |= 0x09; 750 modem_ctl[1] = 0x80; 751 dbg("%s - flow control = CRTSCTS", __func__); 752 } else { 753 modem_ctl[0] &= ~0x7B; 754 modem_ctl[0] |= 0x01; 755 modem_ctl[1] |= 0x40; 756 dbg("%s - flow control = NONE", __func__); 757 } 758 759 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", 760 __func__, modem_ctl[0], modem_ctl[1], 761 modem_ctl[2], modem_ctl[3]); 762 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16); 763 } 764 765 } 766 767 static int cp210x_tiocmset (struct tty_struct *tty, 768 unsigned int set, unsigned int clear) 769 { 770 struct usb_serial_port *port = tty->driver_data; 771 return cp210x_tiocmset_port(port, set, clear); 772 } 773 774 static int cp210x_tiocmset_port(struct usb_serial_port *port, 775 unsigned int set, unsigned int clear) 776 { 777 unsigned int control = 0; 778 779 if (set & TIOCM_RTS) { 780 control |= CONTROL_RTS; 781 control |= CONTROL_WRITE_RTS; 782 } 783 if (set & TIOCM_DTR) { 784 control |= CONTROL_DTR; 785 control |= CONTROL_WRITE_DTR; 786 } 787 if (clear & TIOCM_RTS) { 788 control &= ~CONTROL_RTS; 789 control |= CONTROL_WRITE_RTS; 790 } 791 if (clear & TIOCM_DTR) { 792 control &= ~CONTROL_DTR; 793 control |= CONTROL_WRITE_DTR; 794 } 795 796 dbg("%s - control = 0x%.4x", __func__, control); 797 798 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2); 799 } 800 801 static void cp210x_dtr_rts(struct usb_serial_port *p, int on) 802 { 803 if (on) 804 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0); 805 else 806 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS); 807 } 808 809 static int cp210x_tiocmget (struct tty_struct *tty) 810 { 811 struct usb_serial_port *port = tty->driver_data; 812 unsigned int control; 813 int result; 814 815 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1); 816 817 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) 818 |((control & CONTROL_RTS) ? TIOCM_RTS : 0) 819 |((control & CONTROL_CTS) ? TIOCM_CTS : 0) 820 |((control & CONTROL_DSR) ? TIOCM_DSR : 0) 821 |((control & CONTROL_RING)? TIOCM_RI : 0) 822 |((control & CONTROL_DCD) ? TIOCM_CD : 0); 823 824 dbg("%s - control = 0x%.2x", __func__, control); 825 826 return result; 827 } 828 829 static void cp210x_break_ctl (struct tty_struct *tty, int break_state) 830 { 831 struct usb_serial_port *port = tty->driver_data; 832 unsigned int state; 833 834 if (break_state == 0) 835 state = BREAK_OFF; 836 else 837 state = BREAK_ON; 838 dbg("%s - turning break %s", __func__, 839 state == BREAK_OFF ? "off" : "on"); 840 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2); 841 } 842 843 static int cp210x_startup(struct usb_serial *serial) 844 { 845 struct cp210x_port_private *port_priv; 846 int i; 847 848 /* cp210x buffers behave strangely unless device is reset */ 849 usb_reset_device(serial->dev); 850 851 for (i = 0; i < serial->num_ports; i++) { 852 port_priv = kzalloc(sizeof(*port_priv), GFP_KERNEL); 853 if (!port_priv) 854 return -ENOMEM; 855 856 memset(port_priv, 0x00, sizeof(*port_priv)); 857 port_priv->bInterfaceNumber = 858 serial->interface->cur_altsetting->desc.bInterfaceNumber; 859 860 usb_set_serial_port_data(serial->port[i], port_priv); 861 } 862 863 return 0; 864 } 865 866 static void cp210x_release(struct usb_serial *serial) 867 { 868 struct cp210x_port_private *port_priv; 869 int i; 870 871 for (i = 0; i < serial->num_ports; i++) { 872 port_priv = usb_get_serial_port_data(serial->port[i]); 873 kfree(port_priv); 874 usb_set_serial_port_data(serial->port[i], NULL); 875 } 876 } 877 878 module_usb_serial_driver(serial_drivers, id_table); 879 880 MODULE_DESCRIPTION(DRIVER_DESC); 881 MODULE_VERSION(DRIVER_VERSION); 882 MODULE_LICENSE("GPL"); 883 884 module_param(debug, bool, S_IRUGO | S_IWUSR); 885 MODULE_PARM_DESC(debug, "Enable verbose debugging messages"); 886