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 */ 32 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *); 33 static void cp210x_close(struct usb_serial_port *); 34 static void cp210x_get_termios(struct tty_struct *, struct usb_serial_port *); 35 static void cp210x_get_termios_port(struct usb_serial_port *port, 36 unsigned int *cflagp, unsigned int *baudp); 37 static void cp210x_change_speed(struct tty_struct *, struct usb_serial_port *, 38 struct ktermios *); 39 static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *, 40 struct ktermios*); 41 static int cp210x_tiocmget(struct tty_struct *); 42 static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int); 43 static int cp210x_tiocmset_port(struct usb_serial_port *port, 44 unsigned int, unsigned int); 45 static void cp210x_break_ctl(struct tty_struct *, int); 46 static int cp210x_startup(struct usb_serial *); 47 static void cp210x_release(struct usb_serial *); 48 static void cp210x_dtr_rts(struct usb_serial_port *p, int on); 49 50 static 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, 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 demonstration module */ 108 { USB_DEVICE(0x10C4, 0x8281) }, /* Nanotec Plug & Drive */ 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, 0x85F8) }, /* Virtenio Preon32 */ 122 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */ 123 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */ 124 { USB_DEVICE(0x10C4, 0x8856) }, /* CEL EM357 ZigBee USB Stick - LR */ 125 { USB_DEVICE(0x10C4, 0x8857) }, /* CEL EM357 ZigBee USB Stick */ 126 { USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */ 127 { USB_DEVICE(0x10C4, 0x88A5) }, /* Planet Innovation Ingeni ZigBee USB Device */ 128 { USB_DEVICE(0x10C4, 0x8946) }, /* Ketra N1 Wireless Interface */ 129 { USB_DEVICE(0x10C4, 0x8977) }, /* CEL MeshWorks DevKit Device */ 130 { USB_DEVICE(0x10C4, 0x8998) }, /* KCF Technologies PRN */ 131 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ 132 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ 133 { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */ 134 { USB_DEVICE(0x10C4, 0xEA80) }, /* Silicon Labs factory default */ 135 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */ 136 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */ 137 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */ 138 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */ 139 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */ 140 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ 141 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */ 142 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ 143 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */ 144 { USB_DEVICE(0x166A, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */ 145 { USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */ 146 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ 147 { USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */ 148 { USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */ 149 { USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */ 150 { USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */ 151 { USB_DEVICE(0x16C0, 0x09B0) }, /* Lunatico Seletek */ 152 { USB_DEVICE(0x16C0, 0x09B1) }, /* Lunatico Seletek */ 153 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ 154 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */ 155 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */ 156 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */ 157 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */ 158 { USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */ 159 { USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */ 160 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */ 161 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */ 162 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */ 163 { USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */ 164 { USB_DEVICE(0x1B1C, 0x1C00) }, /* Corsair USB Dongle */ 165 { USB_DEVICE(0x1BA4, 0x0002) }, /* Silicon Labs 358x factory default */ 166 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */ 167 { USB_DEVICE(0x1D6F, 0x0010) }, /* Seluxit ApS RF Dongle */ 168 { USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */ 169 { USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */ 170 { USB_DEVICE(0x1FB9, 0x0100) }, /* Lake Shore Model 121 Current Source */ 171 { USB_DEVICE(0x1FB9, 0x0200) }, /* Lake Shore Model 218A Temperature Monitor */ 172 { USB_DEVICE(0x1FB9, 0x0201) }, /* Lake Shore Model 219 Temperature Monitor */ 173 { USB_DEVICE(0x1FB9, 0x0202) }, /* Lake Shore Model 233 Temperature Transmitter */ 174 { USB_DEVICE(0x1FB9, 0x0203) }, /* Lake Shore Model 235 Temperature Transmitter */ 175 { USB_DEVICE(0x1FB9, 0x0300) }, /* Lake Shore Model 335 Temperature Controller */ 176 { USB_DEVICE(0x1FB9, 0x0301) }, /* Lake Shore Model 336 Temperature Controller */ 177 { USB_DEVICE(0x1FB9, 0x0302) }, /* Lake Shore Model 350 Temperature Controller */ 178 { USB_DEVICE(0x1FB9, 0x0303) }, /* Lake Shore Model 371 AC Bridge */ 179 { USB_DEVICE(0x1FB9, 0x0400) }, /* Lake Shore Model 411 Handheld Gaussmeter */ 180 { USB_DEVICE(0x1FB9, 0x0401) }, /* Lake Shore Model 425 Gaussmeter */ 181 { USB_DEVICE(0x1FB9, 0x0402) }, /* Lake Shore Model 455A Gaussmeter */ 182 { USB_DEVICE(0x1FB9, 0x0403) }, /* Lake Shore Model 475A Gaussmeter */ 183 { USB_DEVICE(0x1FB9, 0x0404) }, /* Lake Shore Model 465 Three Axis Gaussmeter */ 184 { USB_DEVICE(0x1FB9, 0x0600) }, /* Lake Shore Model 625A Superconducting MPS */ 185 { USB_DEVICE(0x1FB9, 0x0601) }, /* Lake Shore Model 642A Magnet Power Supply */ 186 { USB_DEVICE(0x1FB9, 0x0602) }, /* Lake Shore Model 648 Magnet Power Supply */ 187 { USB_DEVICE(0x1FB9, 0x0700) }, /* Lake Shore Model 737 VSM Controller */ 188 { USB_DEVICE(0x1FB9, 0x0701) }, /* Lake Shore Model 776 Hall Matrix */ 189 { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */ 190 { USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */ 191 { USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */ 192 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */ 193 { } /* Terminating Entry */ 194 }; 195 196 MODULE_DEVICE_TABLE(usb, id_table); 197 198 struct cp210x_serial_private { 199 __u8 bInterfaceNumber; 200 }; 201 202 static struct usb_serial_driver cp210x_device = { 203 .driver = { 204 .owner = THIS_MODULE, 205 .name = "cp210x", 206 }, 207 .id_table = id_table, 208 .num_ports = 1, 209 .bulk_in_size = 256, 210 .bulk_out_size = 256, 211 .open = cp210x_open, 212 .close = cp210x_close, 213 .break_ctl = cp210x_break_ctl, 214 .set_termios = cp210x_set_termios, 215 .tiocmget = cp210x_tiocmget, 216 .tiocmset = cp210x_tiocmset, 217 .attach = cp210x_startup, 218 .release = cp210x_release, 219 .dtr_rts = cp210x_dtr_rts 220 }; 221 222 static struct usb_serial_driver * const serial_drivers[] = { 223 &cp210x_device, NULL 224 }; 225 226 /* Config request types */ 227 #define REQTYPE_HOST_TO_INTERFACE 0x41 228 #define REQTYPE_INTERFACE_TO_HOST 0xc1 229 #define REQTYPE_HOST_TO_DEVICE 0x40 230 #define REQTYPE_DEVICE_TO_HOST 0xc0 231 232 /* Config request codes */ 233 #define CP210X_IFC_ENABLE 0x00 234 #define CP210X_SET_BAUDDIV 0x01 235 #define CP210X_GET_BAUDDIV 0x02 236 #define CP210X_SET_LINE_CTL 0x03 237 #define CP210X_GET_LINE_CTL 0x04 238 #define CP210X_SET_BREAK 0x05 239 #define CP210X_IMM_CHAR 0x06 240 #define CP210X_SET_MHS 0x07 241 #define CP210X_GET_MDMSTS 0x08 242 #define CP210X_SET_XON 0x09 243 #define CP210X_SET_XOFF 0x0A 244 #define CP210X_SET_EVENTMASK 0x0B 245 #define CP210X_GET_EVENTMASK 0x0C 246 #define CP210X_SET_CHAR 0x0D 247 #define CP210X_GET_CHARS 0x0E 248 #define CP210X_GET_PROPS 0x0F 249 #define CP210X_GET_COMM_STATUS 0x10 250 #define CP210X_RESET 0x11 251 #define CP210X_PURGE 0x12 252 #define CP210X_SET_FLOW 0x13 253 #define CP210X_GET_FLOW 0x14 254 #define CP210X_EMBED_EVENTS 0x15 255 #define CP210X_GET_EVENTSTATE 0x16 256 #define CP210X_SET_CHARS 0x19 257 #define CP210X_GET_BAUDRATE 0x1D 258 #define CP210X_SET_BAUDRATE 0x1E 259 260 /* CP210X_IFC_ENABLE */ 261 #define UART_ENABLE 0x0001 262 #define UART_DISABLE 0x0000 263 264 /* CP210X_(SET|GET)_BAUDDIV */ 265 #define BAUD_RATE_GEN_FREQ 0x384000 266 267 /* CP210X_(SET|GET)_LINE_CTL */ 268 #define BITS_DATA_MASK 0X0f00 269 #define BITS_DATA_5 0X0500 270 #define BITS_DATA_6 0X0600 271 #define BITS_DATA_7 0X0700 272 #define BITS_DATA_8 0X0800 273 #define BITS_DATA_9 0X0900 274 275 #define BITS_PARITY_MASK 0x00f0 276 #define BITS_PARITY_NONE 0x0000 277 #define BITS_PARITY_ODD 0x0010 278 #define BITS_PARITY_EVEN 0x0020 279 #define BITS_PARITY_MARK 0x0030 280 #define BITS_PARITY_SPACE 0x0040 281 282 #define BITS_STOP_MASK 0x000f 283 #define BITS_STOP_1 0x0000 284 #define BITS_STOP_1_5 0x0001 285 #define BITS_STOP_2 0x0002 286 287 /* CP210X_SET_BREAK */ 288 #define BREAK_ON 0x0001 289 #define BREAK_OFF 0x0000 290 291 /* CP210X_(SET_MHS|GET_MDMSTS) */ 292 #define CONTROL_DTR 0x0001 293 #define CONTROL_RTS 0x0002 294 #define CONTROL_CTS 0x0010 295 #define CONTROL_DSR 0x0020 296 #define CONTROL_RING 0x0040 297 #define CONTROL_DCD 0x0080 298 #define CONTROL_WRITE_DTR 0x0100 299 #define CONTROL_WRITE_RTS 0x0200 300 301 /* 302 * cp210x_get_config 303 * Reads from the CP210x configuration registers 304 * 'size' is specified in bytes. 305 * 'data' is a pointer to a pre-allocated array of integers large 306 * enough to hold 'size' bytes (with 4 bytes to each integer) 307 */ 308 static int cp210x_get_config(struct usb_serial_port *port, u8 request, 309 unsigned int *data, int size) 310 { 311 struct usb_serial *serial = port->serial; 312 struct cp210x_serial_private *spriv = usb_get_serial_data(serial); 313 __le32 *buf; 314 int result, i, length; 315 316 /* Number of integers required to contain the array */ 317 length = (((size - 1) | 3) + 1) / 4; 318 319 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL); 320 if (!buf) 321 return -ENOMEM; 322 323 /* Issue the request, attempting to read 'size' bytes */ 324 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 325 request, REQTYPE_INTERFACE_TO_HOST, 0x0000, 326 spriv->bInterfaceNumber, buf, size, 327 USB_CTRL_GET_TIMEOUT); 328 329 /* Convert data into an array of integers */ 330 for (i = 0; i < length; i++) 331 data[i] = le32_to_cpu(buf[i]); 332 333 kfree(buf); 334 335 if (result != size) { 336 dev_dbg(&port->dev, "%s - Unable to send config request, request=0x%x size=%d result=%d\n", 337 __func__, request, size, result); 338 if (result > 0) 339 result = -EPROTO; 340 341 return result; 342 } 343 344 return 0; 345 } 346 347 /* 348 * cp210x_set_config 349 * Writes to the CP210x configuration registers 350 * Values less than 16 bits wide are sent directly 351 * 'size' is specified in bytes. 352 */ 353 static int cp210x_set_config(struct usb_serial_port *port, u8 request, 354 unsigned int *data, int size) 355 { 356 struct usb_serial *serial = port->serial; 357 struct cp210x_serial_private *spriv = usb_get_serial_data(serial); 358 __le32 *buf; 359 int result, i, length; 360 361 /* Number of integers required to contain the array */ 362 length = (((size - 1) | 3) + 1) / 4; 363 364 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL); 365 if (!buf) 366 return -ENOMEM; 367 368 /* Array of integers into bytes */ 369 for (i = 0; i < length; i++) 370 buf[i] = cpu_to_le32(data[i]); 371 372 if (size > 2) { 373 result = usb_control_msg(serial->dev, 374 usb_sndctrlpipe(serial->dev, 0), 375 request, REQTYPE_HOST_TO_INTERFACE, 0x0000, 376 spriv->bInterfaceNumber, buf, size, 377 USB_CTRL_SET_TIMEOUT); 378 } else { 379 result = usb_control_msg(serial->dev, 380 usb_sndctrlpipe(serial->dev, 0), 381 request, REQTYPE_HOST_TO_INTERFACE, data[0], 382 spriv->bInterfaceNumber, NULL, 0, 383 USB_CTRL_SET_TIMEOUT); 384 } 385 386 kfree(buf); 387 388 if ((size > 2 && result != size) || result < 0) { 389 dev_dbg(&port->dev, "%s - Unable to send request, request=0x%x size=%d result=%d\n", 390 __func__, request, size, result); 391 if (result > 0) 392 result = -EPROTO; 393 394 return result; 395 } 396 397 return 0; 398 } 399 400 /* 401 * cp210x_set_config_single 402 * Convenience function for calling cp210x_set_config on single data values 403 * without requiring an integer pointer 404 */ 405 static inline int cp210x_set_config_single(struct usb_serial_port *port, 406 u8 request, unsigned int data) 407 { 408 return cp210x_set_config(port, request, &data, 2); 409 } 410 411 /* 412 * cp210x_quantise_baudrate 413 * Quantises the baud rate as per AN205 Table 1 414 */ 415 static unsigned int cp210x_quantise_baudrate(unsigned int baud) 416 { 417 if (baud <= 300) 418 baud = 300; 419 else if (baud <= 600) baud = 600; 420 else if (baud <= 1200) baud = 1200; 421 else if (baud <= 1800) baud = 1800; 422 else if (baud <= 2400) baud = 2400; 423 else if (baud <= 4000) baud = 4000; 424 else if (baud <= 4803) baud = 4800; 425 else if (baud <= 7207) baud = 7200; 426 else if (baud <= 9612) baud = 9600; 427 else if (baud <= 14428) baud = 14400; 428 else if (baud <= 16062) baud = 16000; 429 else if (baud <= 19250) baud = 19200; 430 else if (baud <= 28912) baud = 28800; 431 else if (baud <= 38601) baud = 38400; 432 else if (baud <= 51558) baud = 51200; 433 else if (baud <= 56280) baud = 56000; 434 else if (baud <= 58053) baud = 57600; 435 else if (baud <= 64111) baud = 64000; 436 else if (baud <= 77608) baud = 76800; 437 else if (baud <= 117028) baud = 115200; 438 else if (baud <= 129347) baud = 128000; 439 else if (baud <= 156868) baud = 153600; 440 else if (baud <= 237832) baud = 230400; 441 else if (baud <= 254234) baud = 250000; 442 else if (baud <= 273066) baud = 256000; 443 else if (baud <= 491520) baud = 460800; 444 else if (baud <= 567138) baud = 500000; 445 else if (baud <= 670254) baud = 576000; 446 else if (baud < 1000000) 447 baud = 921600; 448 else if (baud > 2000000) 449 baud = 2000000; 450 return baud; 451 } 452 453 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port) 454 { 455 int result; 456 457 result = cp210x_set_config_single(port, CP210X_IFC_ENABLE, 458 UART_ENABLE); 459 if (result) { 460 dev_err(&port->dev, "%s - Unable to enable UART\n", __func__); 461 return result; 462 } 463 464 /* Configure the termios structure */ 465 cp210x_get_termios(tty, port); 466 467 /* The baud rate must be initialised on cp2104 */ 468 if (tty) 469 cp210x_change_speed(tty, port, NULL); 470 471 return usb_serial_generic_open(tty, port); 472 } 473 474 static void cp210x_close(struct usb_serial_port *port) 475 { 476 usb_serial_generic_close(port); 477 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE); 478 } 479 480 /* 481 * cp210x_get_termios 482 * Reads the baud rate, data bits, parity, stop bits and flow control mode 483 * from the device, corrects any unsupported values, and configures the 484 * termios structure to reflect the state of the device 485 */ 486 static void cp210x_get_termios(struct tty_struct *tty, 487 struct usb_serial_port *port) 488 { 489 unsigned int baud; 490 491 if (tty) { 492 cp210x_get_termios_port(tty->driver_data, 493 &tty->termios.c_cflag, &baud); 494 tty_encode_baud_rate(tty, baud, baud); 495 } else { 496 unsigned int cflag; 497 cflag = 0; 498 cp210x_get_termios_port(port, &cflag, &baud); 499 } 500 } 501 502 /* 503 * cp210x_get_termios_port 504 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port. 505 */ 506 static void cp210x_get_termios_port(struct usb_serial_port *port, 507 unsigned int *cflagp, unsigned int *baudp) 508 { 509 struct device *dev = &port->dev; 510 unsigned int cflag, modem_ctl[4]; 511 unsigned int baud; 512 unsigned int bits; 513 514 cp210x_get_config(port, CP210X_GET_BAUDRATE, &baud, 4); 515 516 dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud); 517 *baudp = baud; 518 519 cflag = *cflagp; 520 521 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 522 cflag &= ~CSIZE; 523 switch (bits & BITS_DATA_MASK) { 524 case BITS_DATA_5: 525 dev_dbg(dev, "%s - data bits = 5\n", __func__); 526 cflag |= CS5; 527 break; 528 case BITS_DATA_6: 529 dev_dbg(dev, "%s - data bits = 6\n", __func__); 530 cflag |= CS6; 531 break; 532 case BITS_DATA_7: 533 dev_dbg(dev, "%s - data bits = 7\n", __func__); 534 cflag |= CS7; 535 break; 536 case BITS_DATA_8: 537 dev_dbg(dev, "%s - data bits = 8\n", __func__); 538 cflag |= CS8; 539 break; 540 case BITS_DATA_9: 541 dev_dbg(dev, "%s - data bits = 9 (not supported, using 8 data bits)\n", __func__); 542 cflag |= CS8; 543 bits &= ~BITS_DATA_MASK; 544 bits |= BITS_DATA_8; 545 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 546 break; 547 default: 548 dev_dbg(dev, "%s - Unknown number of data bits, using 8\n", __func__); 549 cflag |= CS8; 550 bits &= ~BITS_DATA_MASK; 551 bits |= BITS_DATA_8; 552 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 553 break; 554 } 555 556 switch (bits & BITS_PARITY_MASK) { 557 case BITS_PARITY_NONE: 558 dev_dbg(dev, "%s - parity = NONE\n", __func__); 559 cflag &= ~PARENB; 560 break; 561 case BITS_PARITY_ODD: 562 dev_dbg(dev, "%s - parity = ODD\n", __func__); 563 cflag |= (PARENB|PARODD); 564 break; 565 case BITS_PARITY_EVEN: 566 dev_dbg(dev, "%s - parity = EVEN\n", __func__); 567 cflag &= ~PARODD; 568 cflag |= PARENB; 569 break; 570 case BITS_PARITY_MARK: 571 dev_dbg(dev, "%s - parity = MARK\n", __func__); 572 cflag |= (PARENB|PARODD|CMSPAR); 573 break; 574 case BITS_PARITY_SPACE: 575 dev_dbg(dev, "%s - parity = SPACE\n", __func__); 576 cflag &= ~PARODD; 577 cflag |= (PARENB|CMSPAR); 578 break; 579 default: 580 dev_dbg(dev, "%s - Unknown parity mode, disabling parity\n", __func__); 581 cflag &= ~PARENB; 582 bits &= ~BITS_PARITY_MASK; 583 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 584 break; 585 } 586 587 cflag &= ~CSTOPB; 588 switch (bits & BITS_STOP_MASK) { 589 case BITS_STOP_1: 590 dev_dbg(dev, "%s - stop bits = 1\n", __func__); 591 break; 592 case BITS_STOP_1_5: 593 dev_dbg(dev, "%s - stop bits = 1.5 (not supported, using 1 stop bit)\n", __func__); 594 bits &= ~BITS_STOP_MASK; 595 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 596 break; 597 case BITS_STOP_2: 598 dev_dbg(dev, "%s - stop bits = 2\n", __func__); 599 cflag |= CSTOPB; 600 break; 601 default: 602 dev_dbg(dev, "%s - Unknown number of stop bits, using 1 stop bit\n", __func__); 603 bits &= ~BITS_STOP_MASK; 604 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 605 break; 606 } 607 608 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 609 if (modem_ctl[0] & 0x0008) { 610 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__); 611 cflag |= CRTSCTS; 612 } else { 613 dev_dbg(dev, "%s - flow control = NONE\n", __func__); 614 cflag &= ~CRTSCTS; 615 } 616 617 *cflagp = cflag; 618 } 619 620 /* 621 * CP2101 supports the following baud rates: 622 * 623 * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800, 624 * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600 625 * 626 * CP2102 and CP2103 support the following additional rates: 627 * 628 * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000, 629 * 576000 630 * 631 * The device will map a requested rate to a supported one, but the result 632 * of requests for rates greater than 1053257 is undefined (see AN205). 633 * 634 * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud, 635 * respectively, with an error less than 1%. The actual rates are determined 636 * by 637 * 638 * div = round(freq / (2 x prescale x request)) 639 * actual = freq / (2 x prescale x div) 640 * 641 * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps 642 * or 1 otherwise. 643 * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1 644 * otherwise. 645 */ 646 static void cp210x_change_speed(struct tty_struct *tty, 647 struct usb_serial_port *port, struct ktermios *old_termios) 648 { 649 u32 baud; 650 651 baud = tty->termios.c_ospeed; 652 653 /* This maps the requested rate to a rate valid on cp2102 or cp2103, 654 * or to an arbitrary rate in [1M,2M]. 655 * 656 * NOTE: B0 is not implemented. 657 */ 658 baud = cp210x_quantise_baudrate(baud); 659 660 dev_dbg(&port->dev, "%s - setting baud rate to %u\n", __func__, baud); 661 if (cp210x_set_config(port, CP210X_SET_BAUDRATE, &baud, 662 sizeof(baud))) { 663 dev_warn(&port->dev, "failed to set baud rate to %u\n", baud); 664 if (old_termios) 665 baud = old_termios->c_ospeed; 666 else 667 baud = 9600; 668 } 669 670 tty_encode_baud_rate(tty, baud, baud); 671 } 672 673 static void cp210x_set_termios(struct tty_struct *tty, 674 struct usb_serial_port *port, struct ktermios *old_termios) 675 { 676 struct device *dev = &port->dev; 677 unsigned int cflag, old_cflag; 678 unsigned int bits; 679 unsigned int modem_ctl[4]; 680 681 cflag = tty->termios.c_cflag; 682 old_cflag = old_termios->c_cflag; 683 684 if (tty->termios.c_ospeed != old_termios->c_ospeed) 685 cp210x_change_speed(tty, port, old_termios); 686 687 /* If the number of data bits is to be updated */ 688 if ((cflag & CSIZE) != (old_cflag & CSIZE)) { 689 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 690 bits &= ~BITS_DATA_MASK; 691 switch (cflag & CSIZE) { 692 case CS5: 693 bits |= BITS_DATA_5; 694 dev_dbg(dev, "%s - data bits = 5\n", __func__); 695 break; 696 case CS6: 697 bits |= BITS_DATA_6; 698 dev_dbg(dev, "%s - data bits = 6\n", __func__); 699 break; 700 case CS7: 701 bits |= BITS_DATA_7; 702 dev_dbg(dev, "%s - data bits = 7\n", __func__); 703 break; 704 case CS8: 705 bits |= BITS_DATA_8; 706 dev_dbg(dev, "%s - data bits = 8\n", __func__); 707 break; 708 /*case CS9: 709 bits |= BITS_DATA_9; 710 dev_dbg(dev, "%s - data bits = 9\n", __func__); 711 break;*/ 712 default: 713 dev_dbg(dev, "cp210x driver does not support the number of bits requested, using 8 bit mode\n"); 714 bits |= BITS_DATA_8; 715 break; 716 } 717 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 718 dev_dbg(dev, "Number of data bits requested not supported by device\n"); 719 } 720 721 if ((cflag & (PARENB|PARODD|CMSPAR)) != 722 (old_cflag & (PARENB|PARODD|CMSPAR))) { 723 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 724 bits &= ~BITS_PARITY_MASK; 725 if (cflag & PARENB) { 726 if (cflag & CMSPAR) { 727 if (cflag & PARODD) { 728 bits |= BITS_PARITY_MARK; 729 dev_dbg(dev, "%s - parity = MARK\n", __func__); 730 } else { 731 bits |= BITS_PARITY_SPACE; 732 dev_dbg(dev, "%s - parity = SPACE\n", __func__); 733 } 734 } else { 735 if (cflag & PARODD) { 736 bits |= BITS_PARITY_ODD; 737 dev_dbg(dev, "%s - parity = ODD\n", __func__); 738 } else { 739 bits |= BITS_PARITY_EVEN; 740 dev_dbg(dev, "%s - parity = EVEN\n", __func__); 741 } 742 } 743 } 744 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 745 dev_dbg(dev, "Parity mode not supported by device\n"); 746 } 747 748 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { 749 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 750 bits &= ~BITS_STOP_MASK; 751 if (cflag & CSTOPB) { 752 bits |= BITS_STOP_2; 753 dev_dbg(dev, "%s - stop bits = 2\n", __func__); 754 } else { 755 bits |= BITS_STOP_1; 756 dev_dbg(dev, "%s - stop bits = 1\n", __func__); 757 } 758 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 759 dev_dbg(dev, "Number of stop bits requested not supported by device\n"); 760 } 761 762 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { 763 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 764 dev_dbg(dev, "%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n", 765 __func__, modem_ctl[0], modem_ctl[1], 766 modem_ctl[2], modem_ctl[3]); 767 768 if (cflag & CRTSCTS) { 769 modem_ctl[0] &= ~0x7B; 770 modem_ctl[0] |= 0x09; 771 modem_ctl[1] = 0x80; 772 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__); 773 } else { 774 modem_ctl[0] &= ~0x7B; 775 modem_ctl[0] |= 0x01; 776 modem_ctl[1] |= 0x40; 777 dev_dbg(dev, "%s - flow control = NONE\n", __func__); 778 } 779 780 dev_dbg(dev, "%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n", 781 __func__, modem_ctl[0], modem_ctl[1], 782 modem_ctl[2], modem_ctl[3]); 783 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16); 784 } 785 786 } 787 788 static int cp210x_tiocmset(struct tty_struct *tty, 789 unsigned int set, unsigned int clear) 790 { 791 struct usb_serial_port *port = tty->driver_data; 792 return cp210x_tiocmset_port(port, set, clear); 793 } 794 795 static int cp210x_tiocmset_port(struct usb_serial_port *port, 796 unsigned int set, unsigned int clear) 797 { 798 unsigned int control = 0; 799 800 if (set & TIOCM_RTS) { 801 control |= CONTROL_RTS; 802 control |= CONTROL_WRITE_RTS; 803 } 804 if (set & TIOCM_DTR) { 805 control |= CONTROL_DTR; 806 control |= CONTROL_WRITE_DTR; 807 } 808 if (clear & TIOCM_RTS) { 809 control &= ~CONTROL_RTS; 810 control |= CONTROL_WRITE_RTS; 811 } 812 if (clear & TIOCM_DTR) { 813 control &= ~CONTROL_DTR; 814 control |= CONTROL_WRITE_DTR; 815 } 816 817 dev_dbg(&port->dev, "%s - control = 0x%.4x\n", __func__, control); 818 819 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2); 820 } 821 822 static void cp210x_dtr_rts(struct usb_serial_port *p, int on) 823 { 824 if (on) 825 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0); 826 else 827 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS); 828 } 829 830 static int cp210x_tiocmget(struct tty_struct *tty) 831 { 832 struct usb_serial_port *port = tty->driver_data; 833 unsigned int control; 834 int result; 835 836 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1); 837 838 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) 839 |((control & CONTROL_RTS) ? TIOCM_RTS : 0) 840 |((control & CONTROL_CTS) ? TIOCM_CTS : 0) 841 |((control & CONTROL_DSR) ? TIOCM_DSR : 0) 842 |((control & CONTROL_RING)? TIOCM_RI : 0) 843 |((control & CONTROL_DCD) ? TIOCM_CD : 0); 844 845 dev_dbg(&port->dev, "%s - control = 0x%.2x\n", __func__, control); 846 847 return result; 848 } 849 850 static void cp210x_break_ctl(struct tty_struct *tty, int break_state) 851 { 852 struct usb_serial_port *port = tty->driver_data; 853 unsigned int state; 854 855 if (break_state == 0) 856 state = BREAK_OFF; 857 else 858 state = BREAK_ON; 859 dev_dbg(&port->dev, "%s - turning break %s\n", __func__, 860 state == BREAK_OFF ? "off" : "on"); 861 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2); 862 } 863 864 static int cp210x_startup(struct usb_serial *serial) 865 { 866 struct usb_host_interface *cur_altsetting; 867 struct cp210x_serial_private *spriv; 868 869 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL); 870 if (!spriv) 871 return -ENOMEM; 872 873 cur_altsetting = serial->interface->cur_altsetting; 874 spriv->bInterfaceNumber = cur_altsetting->desc.bInterfaceNumber; 875 876 usb_set_serial_data(serial, spriv); 877 878 return 0; 879 } 880 881 static void cp210x_release(struct usb_serial *serial) 882 { 883 struct cp210x_serial_private *spriv; 884 885 spriv = usb_get_serial_data(serial); 886 kfree(spriv); 887 } 888 889 module_usb_serial_driver(serial_drivers, id_table); 890 891 MODULE_DESCRIPTION(DRIVER_DESC); 892 MODULE_LICENSE("GPL"); 893