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#define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver" 28 29/* 30 * Function Prototypes 31 */ 32static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *); 33static void cp210x_close(struct usb_serial_port *); 34static void cp210x_get_termios(struct tty_struct *, struct usb_serial_port *); 35static void cp210x_get_termios_port(struct usb_serial_port *port, 36 unsigned int *cflagp, unsigned int *baudp); 37static void cp210x_change_speed(struct tty_struct *, struct usb_serial_port *, 38 struct ktermios *); 39static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *, 40 struct ktermios*); 41static int cp210x_tiocmget(struct tty_struct *); 42static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int); 43static int cp210x_tiocmset_port(struct usb_serial_port *port, 44 unsigned int, unsigned int); 45static void cp210x_break_ctl(struct tty_struct *, int); 46static int cp210x_startup(struct usb_serial *); 47static void cp210x_release(struct usb_serial *); 48static void cp210x_dtr_rts(struct usb_serial_port *p, int on); 49 50static const struct usb_device_id id_table[] = { 51 { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */ 52 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */ 53 { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */ 54 { USB_DEVICE(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */ 55 { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */ 56 { USB_DEVICE(0x0846, 0x1100) }, /* NetGear Managed Switch M4100 series, M5300 series, M7100 series */ 57 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */ 58 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */ 59 { USB_DEVICE(0x0908, 0x01FF) }, /* Siemens RUGGEDCOM USB Serial Console */ 60 { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */ 61 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */ 62 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */ 63 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */ 64 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */ 65 { USB_DEVICE(0x0FDE, 0xCA05) }, /* OWL Wireless Electricity Monitor CM-160 */ 66 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */ 67 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */ 68 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */ 69 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */ 70 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */ 71 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */ 72 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */ 73 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */ 74 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */ 75 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */ 76 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */ 77 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */ 78 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */ 79 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */ 80 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */ 81 { USB_DEVICE(0x10C4, 0x80C4) }, /* Cygnal Integrated Products, Inc., Optris infrared thermometer */ 82 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */ 83 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */ 84 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */ 85 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */ 86 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */ 87 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */ 88 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */ 89 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */ 90 { USB_DEVICE(0x2405, 0x0003) }, /* West Mountain Radio RIGblaster Advantage */ 91 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */ 92 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */ 93 { USB_DEVICE(0x10C4, 0x815F) }, /* Timewave HamLinkUSB */ 94 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */ 95 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */ 96 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */ 97 { USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */ 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, 0x81D7) }, /* IAI Corp. RCB-CV-USB USB to RS485 Adaptor */ 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, 0x8281) }, /* Nanotec Plug & Drive */ 110 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */ 111 { USB_DEVICE(0x10C4, 0x82F4) }, /* Starizona MicroTouch */ 112 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */ 113 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */ 114 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */ 115 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */ 116 { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */ 117 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */ 118 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */ 119 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */ 120 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */ 121 { USB_DEVICE(0x10C4, 0x84B6) }, /* Starizona Hyperion */ 122 { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */ 123 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */ 124 { USB_DEVICE(0x10C4, 0x85F8) }, /* Virtenio Preon32 */ 125 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */ 126 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */ 127 { USB_DEVICE(0x10C4, 0x8856) }, /* CEL EM357 ZigBee USB Stick - LR */ 128 { USB_DEVICE(0x10C4, 0x8857) }, /* CEL EM357 ZigBee USB Stick */ 129 { USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */ 130 { USB_DEVICE(0x10C4, 0x88A5) }, /* Planet Innovation Ingeni ZigBee USB Device */ 131 { USB_DEVICE(0x10C4, 0x8946) }, /* Ketra N1 Wireless Interface */ 132 { USB_DEVICE(0x10C4, 0x8977) }, /* CEL MeshWorks DevKit Device */ 133 { USB_DEVICE(0x10C4, 0x8998) }, /* KCF Technologies PRN */ 134 { USB_DEVICE(0x10C4, 0x8A2A) }, /* HubZ dual ZigBee and Z-Wave dongle */ 135 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ 136 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ 137 { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */ 138 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */ 139 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */ 140 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */ 141 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */ 142 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */ 143 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ 144 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */ 145 { USB_DEVICE(0x12B8, 0xEC60) }, /* Link G4 ECU */ 146 { USB_DEVICE(0x12B8, 0xEC62) }, /* Link G4+ ECU */ 147 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ 148 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */ 149 { USB_DEVICE(0x166A, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */ 150 { USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */ 151 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ 152 { USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */ 153 { USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */ 154 { USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */ 155 { USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */ 156 { USB_DEVICE(0x16C0, 0x09B0) }, /* Lunatico Seletek */ 157 { USB_DEVICE(0x16C0, 0x09B1) }, /* Lunatico Seletek */ 158 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ 159 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */ 160 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */ 161 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */ 162 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */ 163 { USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */ 164 { USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */ 165 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */ 166 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */ 167 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */ 168 { USB_DEVICE(0x18EF, 0xE025) }, /* ELV Marble Sound Board 1 */ 169 { USB_DEVICE(0x1901, 0x0190) }, /* GE B850 CP2105 Recorder interface */ 170 { USB_DEVICE(0x1901, 0x0193) }, /* GE B650 CP2104 PMC interface */ 171 { USB_DEVICE(0x1901, 0x0194) }, /* GE Healthcare Remote Alarm Box */ 172 { USB_DEVICE(0x19CF, 0x3000) }, /* Parrot NMEA GPS Flight Recorder */ 173 { USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */ 174 { USB_DEVICE(0x1B1C, 0x1C00) }, /* Corsair USB Dongle */ 175 { USB_DEVICE(0x1BA4, 0x0002) }, /* Silicon Labs 358x factory default */ 176 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */ 177 { USB_DEVICE(0x1D6F, 0x0010) }, /* Seluxit ApS RF Dongle */ 178 { USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */ 179 { USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */ 180 { USB_DEVICE(0x1FB9, 0x0100) }, /* Lake Shore Model 121 Current Source */ 181 { USB_DEVICE(0x1FB9, 0x0200) }, /* Lake Shore Model 218A Temperature Monitor */ 182 { USB_DEVICE(0x1FB9, 0x0201) }, /* Lake Shore Model 219 Temperature Monitor */ 183 { USB_DEVICE(0x1FB9, 0x0202) }, /* Lake Shore Model 233 Temperature Transmitter */ 184 { USB_DEVICE(0x1FB9, 0x0203) }, /* Lake Shore Model 235 Temperature Transmitter */ 185 { USB_DEVICE(0x1FB9, 0x0300) }, /* Lake Shore Model 335 Temperature Controller */ 186 { USB_DEVICE(0x1FB9, 0x0301) }, /* Lake Shore Model 336 Temperature Controller */ 187 { USB_DEVICE(0x1FB9, 0x0302) }, /* Lake Shore Model 350 Temperature Controller */ 188 { USB_DEVICE(0x1FB9, 0x0303) }, /* Lake Shore Model 371 AC Bridge */ 189 { USB_DEVICE(0x1FB9, 0x0400) }, /* Lake Shore Model 411 Handheld Gaussmeter */ 190 { USB_DEVICE(0x1FB9, 0x0401) }, /* Lake Shore Model 425 Gaussmeter */ 191 { USB_DEVICE(0x1FB9, 0x0402) }, /* Lake Shore Model 455A Gaussmeter */ 192 { USB_DEVICE(0x1FB9, 0x0403) }, /* Lake Shore Model 475A Gaussmeter */ 193 { USB_DEVICE(0x1FB9, 0x0404) }, /* Lake Shore Model 465 Three Axis Gaussmeter */ 194 { USB_DEVICE(0x1FB9, 0x0600) }, /* Lake Shore Model 625A Superconducting MPS */ 195 { USB_DEVICE(0x1FB9, 0x0601) }, /* Lake Shore Model 642A Magnet Power Supply */ 196 { USB_DEVICE(0x1FB9, 0x0602) }, /* Lake Shore Model 648 Magnet Power Supply */ 197 { USB_DEVICE(0x1FB9, 0x0700) }, /* Lake Shore Model 737 VSM Controller */ 198 { USB_DEVICE(0x1FB9, 0x0701) }, /* Lake Shore Model 776 Hall Matrix */ 199 { USB_DEVICE(0x2626, 0xEA60) }, /* Aruba Networks 7xxx USB Serial Console */ 200 { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */ 201 { USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */ 202 { USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */ 203 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */ 204 { } /* Terminating Entry */ 205}; 206 207MODULE_DEVICE_TABLE(usb, id_table); 208 209struct cp210x_serial_private { 210 __u8 bInterfaceNumber; 211}; 212 213static struct usb_serial_driver cp210x_device = { 214 .driver = { 215 .owner = THIS_MODULE, 216 .name = "cp210x", 217 }, 218 .id_table = id_table, 219 .num_ports = 1, 220 .bulk_in_size = 256, 221 .bulk_out_size = 256, 222 .open = cp210x_open, 223 .close = cp210x_close, 224 .break_ctl = cp210x_break_ctl, 225 .set_termios = cp210x_set_termios, 226 .tiocmget = cp210x_tiocmget, 227 .tiocmset = cp210x_tiocmset, 228 .attach = cp210x_startup, 229 .release = cp210x_release, 230 .dtr_rts = cp210x_dtr_rts 231}; 232 233static struct usb_serial_driver * const serial_drivers[] = { 234 &cp210x_device, NULL 235}; 236 237/* Config request types */ 238#define REQTYPE_HOST_TO_INTERFACE 0x41 239#define REQTYPE_INTERFACE_TO_HOST 0xc1 240#define REQTYPE_HOST_TO_DEVICE 0x40 241#define REQTYPE_DEVICE_TO_HOST 0xc0 242 243/* Config request codes */ 244#define CP210X_IFC_ENABLE 0x00 245#define CP210X_SET_BAUDDIV 0x01 246#define CP210X_GET_BAUDDIV 0x02 247#define CP210X_SET_LINE_CTL 0x03 248#define CP210X_GET_LINE_CTL 0x04 249#define CP210X_SET_BREAK 0x05 250#define CP210X_IMM_CHAR 0x06 251#define CP210X_SET_MHS 0x07 252#define CP210X_GET_MDMSTS 0x08 253#define CP210X_SET_XON 0x09 254#define CP210X_SET_XOFF 0x0A 255#define CP210X_SET_EVENTMASK 0x0B 256#define CP210X_GET_EVENTMASK 0x0C 257#define CP210X_SET_CHAR 0x0D 258#define CP210X_GET_CHARS 0x0E 259#define CP210X_GET_PROPS 0x0F 260#define CP210X_GET_COMM_STATUS 0x10 261#define CP210X_RESET 0x11 262#define CP210X_PURGE 0x12 263#define CP210X_SET_FLOW 0x13 264#define CP210X_GET_FLOW 0x14 265#define CP210X_EMBED_EVENTS 0x15 266#define CP210X_GET_EVENTSTATE 0x16 267#define CP210X_SET_CHARS 0x19 268#define CP210X_GET_BAUDRATE 0x1D 269#define CP210X_SET_BAUDRATE 0x1E 270 271/* CP210X_IFC_ENABLE */ 272#define UART_ENABLE 0x0001 273#define UART_DISABLE 0x0000 274 275/* CP210X_(SET|GET)_BAUDDIV */ 276#define BAUD_RATE_GEN_FREQ 0x384000 277 278/* CP210X_(SET|GET)_LINE_CTL */ 279#define BITS_DATA_MASK 0X0f00 280#define BITS_DATA_5 0X0500 281#define BITS_DATA_6 0X0600 282#define BITS_DATA_7 0X0700 283#define BITS_DATA_8 0X0800 284#define BITS_DATA_9 0X0900 285 286#define BITS_PARITY_MASK 0x00f0 287#define BITS_PARITY_NONE 0x0000 288#define BITS_PARITY_ODD 0x0010 289#define BITS_PARITY_EVEN 0x0020 290#define BITS_PARITY_MARK 0x0030 291#define BITS_PARITY_SPACE 0x0040 292 293#define BITS_STOP_MASK 0x000f 294#define BITS_STOP_1 0x0000 295#define BITS_STOP_1_5 0x0001 296#define BITS_STOP_2 0x0002 297 298/* CP210X_SET_BREAK */ 299#define BREAK_ON 0x0001 300#define BREAK_OFF 0x0000 301 302/* CP210X_(SET_MHS|GET_MDMSTS) */ 303#define CONTROL_DTR 0x0001 304#define CONTROL_RTS 0x0002 305#define CONTROL_CTS 0x0010 306#define CONTROL_DSR 0x0020 307#define CONTROL_RING 0x0040 308#define CONTROL_DCD 0x0080 309#define CONTROL_WRITE_DTR 0x0100 310#define CONTROL_WRITE_RTS 0x0200 311 312/* 313 * cp210x_get_config 314 * Reads from the CP210x configuration registers 315 * 'size' is specified in bytes. 316 * 'data' is a pointer to a pre-allocated array of integers large 317 * enough to hold 'size' bytes (with 4 bytes to each integer) 318 */ 319static int cp210x_get_config(struct usb_serial_port *port, u8 request, 320 unsigned int *data, int size) 321{ 322 struct usb_serial *serial = port->serial; 323 struct cp210x_serial_private *spriv = usb_get_serial_data(serial); 324 __le32 *buf; 325 int result, i, length; 326 327 /* Number of integers required to contain the array */ 328 length = (((size - 1) | 3) + 1) / 4; 329 330 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL); 331 if (!buf) 332 return -ENOMEM; 333 334 /* Issue the request, attempting to read 'size' bytes */ 335 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 336 request, REQTYPE_INTERFACE_TO_HOST, 0x0000, 337 spriv->bInterfaceNumber, buf, size, 338 USB_CTRL_GET_TIMEOUT); 339 340 /* Convert data into an array of integers */ 341 for (i = 0; i < length; i++) 342 data[i] = le32_to_cpu(buf[i]); 343 344 kfree(buf); 345 346 if (result != size) { 347 dev_dbg(&port->dev, "%s - Unable to send config request, request=0x%x size=%d result=%d\n", 348 __func__, request, size, result); 349 if (result > 0) 350 result = -EPROTO; 351 352 return result; 353 } 354 355 return 0; 356} 357 358/* 359 * cp210x_set_config 360 * Writes to the CP210x configuration registers 361 * Values less than 16 bits wide are sent directly 362 * 'size' is specified in bytes. 363 */ 364static int cp210x_set_config(struct usb_serial_port *port, u8 request, 365 unsigned int *data, int size) 366{ 367 struct usb_serial *serial = port->serial; 368 struct cp210x_serial_private *spriv = usb_get_serial_data(serial); 369 __le32 *buf; 370 int result, i, length; 371 372 /* Number of integers required to contain the array */ 373 length = (((size - 1) | 3) + 1) / 4; 374 375 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL); 376 if (!buf) 377 return -ENOMEM; 378 379 /* Array of integers into bytes */ 380 for (i = 0; i < length; i++) 381 buf[i] = cpu_to_le32(data[i]); 382 383 if (size > 2) { 384 result = usb_control_msg(serial->dev, 385 usb_sndctrlpipe(serial->dev, 0), 386 request, REQTYPE_HOST_TO_INTERFACE, 0x0000, 387 spriv->bInterfaceNumber, buf, size, 388 USB_CTRL_SET_TIMEOUT); 389 } else { 390 result = usb_control_msg(serial->dev, 391 usb_sndctrlpipe(serial->dev, 0), 392 request, REQTYPE_HOST_TO_INTERFACE, data[0], 393 spriv->bInterfaceNumber, NULL, 0, 394 USB_CTRL_SET_TIMEOUT); 395 } 396 397 kfree(buf); 398 399 if ((size > 2 && result != size) || result < 0) { 400 dev_dbg(&port->dev, "%s - Unable to send request, request=0x%x size=%d result=%d\n", 401 __func__, request, size, result); 402 if (result > 0) 403 result = -EPROTO; 404 405 return result; 406 } 407 408 return 0; 409} 410 411/* 412 * cp210x_set_config_single 413 * Convenience function for calling cp210x_set_config on single data values 414 * without requiring an integer pointer 415 */ 416static inline int cp210x_set_config_single(struct usb_serial_port *port, 417 u8 request, unsigned int data) 418{ 419 return cp210x_set_config(port, request, &data, 2); 420} 421 422/* 423 * cp210x_quantise_baudrate 424 * Quantises the baud rate as per AN205 Table 1 425 */ 426static unsigned int cp210x_quantise_baudrate(unsigned int baud) 427{ 428 if (baud <= 300) 429 baud = 300; 430 else if (baud <= 600) baud = 600; 431 else if (baud <= 1200) baud = 1200; 432 else if (baud <= 1800) baud = 1800; 433 else if (baud <= 2400) baud = 2400; 434 else if (baud <= 4000) baud = 4000; 435 else if (baud <= 4803) baud = 4800; 436 else if (baud <= 7207) baud = 7200; 437 else if (baud <= 9612) baud = 9600; 438 else if (baud <= 14428) baud = 14400; 439 else if (baud <= 16062) baud = 16000; 440 else if (baud <= 19250) baud = 19200; 441 else if (baud <= 28912) baud = 28800; 442 else if (baud <= 38601) baud = 38400; 443 else if (baud <= 51558) baud = 51200; 444 else if (baud <= 56280) baud = 56000; 445 else if (baud <= 58053) baud = 57600; 446 else if (baud <= 64111) baud = 64000; 447 else if (baud <= 77608) baud = 76800; 448 else if (baud <= 117028) baud = 115200; 449 else if (baud <= 129347) baud = 128000; 450 else if (baud <= 156868) baud = 153600; 451 else if (baud <= 237832) baud = 230400; 452 else if (baud <= 254234) baud = 250000; 453 else if (baud <= 273066) baud = 256000; 454 else if (baud <= 491520) baud = 460800; 455 else if (baud <= 567138) baud = 500000; 456 else if (baud <= 670254) baud = 576000; 457 else if (baud < 1000000) 458 baud = 921600; 459 else if (baud > 2000000) 460 baud = 2000000; 461 return baud; 462} 463 464static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port) 465{ 466 int result; 467 468 result = cp210x_set_config_single(port, CP210X_IFC_ENABLE, 469 UART_ENABLE); 470 if (result) { 471 dev_err(&port->dev, "%s - Unable to enable UART\n", __func__); 472 return result; 473 } 474 475 /* Configure the termios structure */ 476 cp210x_get_termios(tty, port); 477 478 /* The baud rate must be initialised on cp2104 */ 479 if (tty) 480 cp210x_change_speed(tty, port, NULL); 481 482 return usb_serial_generic_open(tty, port); 483} 484 485static void cp210x_close(struct usb_serial_port *port) 486{ 487 usb_serial_generic_close(port); 488 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE); 489} 490 491/* 492 * cp210x_get_termios 493 * Reads the baud rate, data bits, parity, stop bits and flow control mode 494 * from the device, corrects any unsupported values, and configures the 495 * termios structure to reflect the state of the device 496 */ 497static void cp210x_get_termios(struct tty_struct *tty, 498 struct usb_serial_port *port) 499{ 500 unsigned int baud; 501 502 if (tty) { 503 cp210x_get_termios_port(tty->driver_data, 504 &tty->termios.c_cflag, &baud); 505 tty_encode_baud_rate(tty, baud, baud); 506 } else { 507 unsigned int cflag; 508 cflag = 0; 509 cp210x_get_termios_port(port, &cflag, &baud); 510 } 511} 512 513/* 514 * cp210x_get_termios_port 515 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port. 516 */ 517static void cp210x_get_termios_port(struct usb_serial_port *port, 518 unsigned int *cflagp, unsigned int *baudp) 519{ 520 struct device *dev = &port->dev; 521 unsigned int cflag, modem_ctl[4]; 522 unsigned int baud; 523 unsigned int bits; 524 525 cp210x_get_config(port, CP210X_GET_BAUDRATE, &baud, 4); 526 527 dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud); 528 *baudp = baud; 529 530 cflag = *cflagp; 531 532 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 533 cflag &= ~CSIZE; 534 switch (bits & BITS_DATA_MASK) { 535 case BITS_DATA_5: 536 dev_dbg(dev, "%s - data bits = 5\n", __func__); 537 cflag |= CS5; 538 break; 539 case BITS_DATA_6: 540 dev_dbg(dev, "%s - data bits = 6\n", __func__); 541 cflag |= CS6; 542 break; 543 case BITS_DATA_7: 544 dev_dbg(dev, "%s - data bits = 7\n", __func__); 545 cflag |= CS7; 546 break; 547 case BITS_DATA_8: 548 dev_dbg(dev, "%s - data bits = 8\n", __func__); 549 cflag |= CS8; 550 break; 551 case BITS_DATA_9: 552 dev_dbg(dev, "%s - data bits = 9 (not supported, using 8 data bits)\n", __func__); 553 cflag |= CS8; 554 bits &= ~BITS_DATA_MASK; 555 bits |= BITS_DATA_8; 556 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 557 break; 558 default: 559 dev_dbg(dev, "%s - Unknown number of data bits, using 8\n", __func__); 560 cflag |= CS8; 561 bits &= ~BITS_DATA_MASK; 562 bits |= BITS_DATA_8; 563 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 564 break; 565 } 566 567 switch (bits & BITS_PARITY_MASK) { 568 case BITS_PARITY_NONE: 569 dev_dbg(dev, "%s - parity = NONE\n", __func__); 570 cflag &= ~PARENB; 571 break; 572 case BITS_PARITY_ODD: 573 dev_dbg(dev, "%s - parity = ODD\n", __func__); 574 cflag |= (PARENB|PARODD); 575 break; 576 case BITS_PARITY_EVEN: 577 dev_dbg(dev, "%s - parity = EVEN\n", __func__); 578 cflag &= ~PARODD; 579 cflag |= PARENB; 580 break; 581 case BITS_PARITY_MARK: 582 dev_dbg(dev, "%s - parity = MARK\n", __func__); 583 cflag |= (PARENB|PARODD|CMSPAR); 584 break; 585 case BITS_PARITY_SPACE: 586 dev_dbg(dev, "%s - parity = SPACE\n", __func__); 587 cflag &= ~PARODD; 588 cflag |= (PARENB|CMSPAR); 589 break; 590 default: 591 dev_dbg(dev, "%s - Unknown parity mode, disabling parity\n", __func__); 592 cflag &= ~PARENB; 593 bits &= ~BITS_PARITY_MASK; 594 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 595 break; 596 } 597 598 cflag &= ~CSTOPB; 599 switch (bits & BITS_STOP_MASK) { 600 case BITS_STOP_1: 601 dev_dbg(dev, "%s - stop bits = 1\n", __func__); 602 break; 603 case BITS_STOP_1_5: 604 dev_dbg(dev, "%s - stop bits = 1.5 (not supported, using 1 stop bit)\n", __func__); 605 bits &= ~BITS_STOP_MASK; 606 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 607 break; 608 case BITS_STOP_2: 609 dev_dbg(dev, "%s - stop bits = 2\n", __func__); 610 cflag |= CSTOPB; 611 break; 612 default: 613 dev_dbg(dev, "%s - Unknown number of stop bits, using 1 stop bit\n", __func__); 614 bits &= ~BITS_STOP_MASK; 615 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 616 break; 617 } 618 619 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 620 if (modem_ctl[0] & 0x0008) { 621 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__); 622 cflag |= CRTSCTS; 623 } else { 624 dev_dbg(dev, "%s - flow control = NONE\n", __func__); 625 cflag &= ~CRTSCTS; 626 } 627 628 *cflagp = cflag; 629} 630 631/* 632 * CP2101 supports the following baud rates: 633 * 634 * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800, 635 * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600 636 * 637 * CP2102 and CP2103 support the following additional rates: 638 * 639 * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000, 640 * 576000 641 * 642 * The device will map a requested rate to a supported one, but the result 643 * of requests for rates greater than 1053257 is undefined (see AN205). 644 * 645 * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud, 646 * respectively, with an error less than 1%. The actual rates are determined 647 * by 648 * 649 * div = round(freq / (2 x prescale x request)) 650 * actual = freq / (2 x prescale x div) 651 * 652 * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps 653 * or 1 otherwise. 654 * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1 655 * otherwise. 656 */ 657static void cp210x_change_speed(struct tty_struct *tty, 658 struct usb_serial_port *port, struct ktermios *old_termios) 659{ 660 u32 baud; 661 662 baud = tty->termios.c_ospeed; 663 664 /* This maps the requested rate to a rate valid on cp2102 or cp2103, 665 * or to an arbitrary rate in [1M,2M]. 666 * 667 * NOTE: B0 is not implemented. 668 */ 669 baud = cp210x_quantise_baudrate(baud); 670 671 dev_dbg(&port->dev, "%s - setting baud rate to %u\n", __func__, baud); 672 if (cp210x_set_config(port, CP210X_SET_BAUDRATE, &baud, 673 sizeof(baud))) { 674 dev_warn(&port->dev, "failed to set baud rate to %u\n", baud); 675 if (old_termios) 676 baud = old_termios->c_ospeed; 677 else 678 baud = 9600; 679 } 680 681 tty_encode_baud_rate(tty, baud, baud); 682} 683 684static void cp210x_set_termios(struct tty_struct *tty, 685 struct usb_serial_port *port, struct ktermios *old_termios) 686{ 687 struct device *dev = &port->dev; 688 unsigned int cflag, old_cflag; 689 unsigned int bits; 690 unsigned int modem_ctl[4]; 691 692 cflag = tty->termios.c_cflag; 693 old_cflag = old_termios->c_cflag; 694 695 if (tty->termios.c_ospeed != old_termios->c_ospeed) 696 cp210x_change_speed(tty, port, old_termios); 697 698 /* If the number of data bits is to be updated */ 699 if ((cflag & CSIZE) != (old_cflag & CSIZE)) { 700 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 701 bits &= ~BITS_DATA_MASK; 702 switch (cflag & CSIZE) { 703 case CS5: 704 bits |= BITS_DATA_5; 705 dev_dbg(dev, "%s - data bits = 5\n", __func__); 706 break; 707 case CS6: 708 bits |= BITS_DATA_6; 709 dev_dbg(dev, "%s - data bits = 6\n", __func__); 710 break; 711 case CS7: 712 bits |= BITS_DATA_7; 713 dev_dbg(dev, "%s - data bits = 7\n", __func__); 714 break; 715 case CS8: 716 bits |= BITS_DATA_8; 717 dev_dbg(dev, "%s - data bits = 8\n", __func__); 718 break; 719 /*case CS9: 720 bits |= BITS_DATA_9; 721 dev_dbg(dev, "%s - data bits = 9\n", __func__); 722 break;*/ 723 default: 724 dev_dbg(dev, "cp210x driver does not support the number of bits requested, using 8 bit mode\n"); 725 bits |= BITS_DATA_8; 726 break; 727 } 728 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 729 dev_dbg(dev, "Number of data bits requested not supported by device\n"); 730 } 731 732 if ((cflag & (PARENB|PARODD|CMSPAR)) != 733 (old_cflag & (PARENB|PARODD|CMSPAR))) { 734 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 735 bits &= ~BITS_PARITY_MASK; 736 if (cflag & PARENB) { 737 if (cflag & CMSPAR) { 738 if (cflag & PARODD) { 739 bits |= BITS_PARITY_MARK; 740 dev_dbg(dev, "%s - parity = MARK\n", __func__); 741 } else { 742 bits |= BITS_PARITY_SPACE; 743 dev_dbg(dev, "%s - parity = SPACE\n", __func__); 744 } 745 } else { 746 if (cflag & PARODD) { 747 bits |= BITS_PARITY_ODD; 748 dev_dbg(dev, "%s - parity = ODD\n", __func__); 749 } else { 750 bits |= BITS_PARITY_EVEN; 751 dev_dbg(dev, "%s - parity = EVEN\n", __func__); 752 } 753 } 754 } 755 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 756 dev_dbg(dev, "Parity mode not supported by device\n"); 757 } 758 759 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { 760 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 761 bits &= ~BITS_STOP_MASK; 762 if (cflag & CSTOPB) { 763 bits |= BITS_STOP_2; 764 dev_dbg(dev, "%s - stop bits = 2\n", __func__); 765 } else { 766 bits |= BITS_STOP_1; 767 dev_dbg(dev, "%s - stop bits = 1\n", __func__); 768 } 769 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 770 dev_dbg(dev, "Number of stop bits requested not supported by device\n"); 771 } 772 773 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { 774 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 775 dev_dbg(dev, "%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n", 776 __func__, modem_ctl[0], modem_ctl[1], 777 modem_ctl[2], modem_ctl[3]); 778 779 if (cflag & CRTSCTS) { 780 modem_ctl[0] &= ~0x7B; 781 modem_ctl[0] |= 0x09; 782 modem_ctl[1] = 0x80; 783 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__); 784 } else { 785 modem_ctl[0] &= ~0x7B; 786 modem_ctl[0] |= 0x01; 787 modem_ctl[1] |= 0x40; 788 dev_dbg(dev, "%s - flow control = NONE\n", __func__); 789 } 790 791 dev_dbg(dev, "%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n", 792 __func__, modem_ctl[0], modem_ctl[1], 793 modem_ctl[2], modem_ctl[3]); 794 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16); 795 } 796 797} 798 799static int cp210x_tiocmset(struct tty_struct *tty, 800 unsigned int set, unsigned int clear) 801{ 802 struct usb_serial_port *port = tty->driver_data; 803 return cp210x_tiocmset_port(port, set, clear); 804} 805 806static int cp210x_tiocmset_port(struct usb_serial_port *port, 807 unsigned int set, unsigned int clear) 808{ 809 unsigned int control = 0; 810 811 if (set & TIOCM_RTS) { 812 control |= CONTROL_RTS; 813 control |= CONTROL_WRITE_RTS; 814 } 815 if (set & TIOCM_DTR) { 816 control |= CONTROL_DTR; 817 control |= CONTROL_WRITE_DTR; 818 } 819 if (clear & TIOCM_RTS) { 820 control &= ~CONTROL_RTS; 821 control |= CONTROL_WRITE_RTS; 822 } 823 if (clear & TIOCM_DTR) { 824 control &= ~CONTROL_DTR; 825 control |= CONTROL_WRITE_DTR; 826 } 827 828 dev_dbg(&port->dev, "%s - control = 0x%.4x\n", __func__, control); 829 830 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2); 831} 832 833static void cp210x_dtr_rts(struct usb_serial_port *p, int on) 834{ 835 if (on) 836 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0); 837 else 838 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS); 839} 840 841static int cp210x_tiocmget(struct tty_struct *tty) 842{ 843 struct usb_serial_port *port = tty->driver_data; 844 unsigned int control; 845 int result; 846 847 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1); 848 849 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) 850 |((control & CONTROL_RTS) ? TIOCM_RTS : 0) 851 |((control & CONTROL_CTS) ? TIOCM_CTS : 0) 852 |((control & CONTROL_DSR) ? TIOCM_DSR : 0) 853 |((control & CONTROL_RING)? TIOCM_RI : 0) 854 |((control & CONTROL_DCD) ? TIOCM_CD : 0); 855 856 dev_dbg(&port->dev, "%s - control = 0x%.2x\n", __func__, control); 857 858 return result; 859} 860 861static void cp210x_break_ctl(struct tty_struct *tty, int break_state) 862{ 863 struct usb_serial_port *port = tty->driver_data; 864 unsigned int state; 865 866 if (break_state == 0) 867 state = BREAK_OFF; 868 else 869 state = BREAK_ON; 870 dev_dbg(&port->dev, "%s - turning break %s\n", __func__, 871 state == BREAK_OFF ? "off" : "on"); 872 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2); 873} 874 875static int cp210x_startup(struct usb_serial *serial) 876{ 877 struct usb_host_interface *cur_altsetting; 878 struct cp210x_serial_private *spriv; 879 880 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL); 881 if (!spriv) 882 return -ENOMEM; 883 884 cur_altsetting = serial->interface->cur_altsetting; 885 spriv->bInterfaceNumber = cur_altsetting->desc.bInterfaceNumber; 886 887 usb_set_serial_data(serial, spriv); 888 889 return 0; 890} 891 892static void cp210x_release(struct usb_serial *serial) 893{ 894 struct cp210x_serial_private *spriv; 895 896 spriv = usb_get_serial_data(serial); 897 kfree(spriv); 898} 899 900module_usb_serial_driver(serial_drivers, id_table); 901 902MODULE_DESCRIPTION(DRIVER_DESC); 903MODULE_LICENSE("GPL"); 904