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, 0x8A2A) }, /* HubZ dual ZigBee and Z-Wave dongle */ 132 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ 133 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ 134 { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */ 135 { USB_DEVICE(0x10C4, 0xEA80) }, /* Silicon Labs factory default */ 136 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */ 137 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */ 138 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */ 139 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */ 140 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */ 141 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ 142 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */ 143 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ 144 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */ 145 { USB_DEVICE(0x166A, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */ 146 { USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */ 147 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ 148 { USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */ 149 { USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */ 150 { USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */ 151 { USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */ 152 { USB_DEVICE(0x16C0, 0x09B0) }, /* Lunatico Seletek */ 153 { USB_DEVICE(0x16C0, 0x09B1) }, /* Lunatico Seletek */ 154 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ 155 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */ 156 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */ 157 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */ 158 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */ 159 { USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */ 160 { USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */ 161 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */ 162 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */ 163 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */ 164 { USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */ 165 { USB_DEVICE(0x1B1C, 0x1C00) }, /* Corsair USB Dongle */ 166 { USB_DEVICE(0x1BA4, 0x0002) }, /* Silicon Labs 358x factory default */ 167 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */ 168 { USB_DEVICE(0x1D6F, 0x0010) }, /* Seluxit ApS RF Dongle */ 169 { USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */ 170 { USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */ 171 { USB_DEVICE(0x1FB9, 0x0100) }, /* Lake Shore Model 121 Current Source */ 172 { USB_DEVICE(0x1FB9, 0x0200) }, /* Lake Shore Model 218A Temperature Monitor */ 173 { USB_DEVICE(0x1FB9, 0x0201) }, /* Lake Shore Model 219 Temperature Monitor */ 174 { USB_DEVICE(0x1FB9, 0x0202) }, /* Lake Shore Model 233 Temperature Transmitter */ 175 { USB_DEVICE(0x1FB9, 0x0203) }, /* Lake Shore Model 235 Temperature Transmitter */ 176 { USB_DEVICE(0x1FB9, 0x0300) }, /* Lake Shore Model 335 Temperature Controller */ 177 { USB_DEVICE(0x1FB9, 0x0301) }, /* Lake Shore Model 336 Temperature Controller */ 178 { USB_DEVICE(0x1FB9, 0x0302) }, /* Lake Shore Model 350 Temperature Controller */ 179 { USB_DEVICE(0x1FB9, 0x0303) }, /* Lake Shore Model 371 AC Bridge */ 180 { USB_DEVICE(0x1FB9, 0x0400) }, /* Lake Shore Model 411 Handheld Gaussmeter */ 181 { USB_DEVICE(0x1FB9, 0x0401) }, /* Lake Shore Model 425 Gaussmeter */ 182 { USB_DEVICE(0x1FB9, 0x0402) }, /* Lake Shore Model 455A Gaussmeter */ 183 { USB_DEVICE(0x1FB9, 0x0403) }, /* Lake Shore Model 475A Gaussmeter */ 184 { USB_DEVICE(0x1FB9, 0x0404) }, /* Lake Shore Model 465 Three Axis Gaussmeter */ 185 { USB_DEVICE(0x1FB9, 0x0600) }, /* Lake Shore Model 625A Superconducting MPS */ 186 { USB_DEVICE(0x1FB9, 0x0601) }, /* Lake Shore Model 642A Magnet Power Supply */ 187 { USB_DEVICE(0x1FB9, 0x0602) }, /* Lake Shore Model 648 Magnet Power Supply */ 188 { USB_DEVICE(0x1FB9, 0x0700) }, /* Lake Shore Model 737 VSM Controller */ 189 { USB_DEVICE(0x1FB9, 0x0701) }, /* Lake Shore Model 776 Hall Matrix */ 190 { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */ 191 { USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */ 192 { USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */ 193 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */ 194 { } /* Terminating Entry */ 195 }; 196 197 MODULE_DEVICE_TABLE(usb, id_table); 198 199 struct cp210x_serial_private { 200 __u8 bInterfaceNumber; 201 }; 202 203 static struct usb_serial_driver cp210x_device = { 204 .driver = { 205 .owner = THIS_MODULE, 206 .name = "cp210x", 207 }, 208 .id_table = id_table, 209 .num_ports = 1, 210 .bulk_in_size = 256, 211 .bulk_out_size = 256, 212 .open = cp210x_open, 213 .close = cp210x_close, 214 .break_ctl = cp210x_break_ctl, 215 .set_termios = cp210x_set_termios, 216 .tiocmget = cp210x_tiocmget, 217 .tiocmset = cp210x_tiocmset, 218 .attach = cp210x_startup, 219 .release = cp210x_release, 220 .dtr_rts = cp210x_dtr_rts 221 }; 222 223 static struct usb_serial_driver * const serial_drivers[] = { 224 &cp210x_device, NULL 225 }; 226 227 /* Config request types */ 228 #define REQTYPE_HOST_TO_INTERFACE 0x41 229 #define REQTYPE_INTERFACE_TO_HOST 0xc1 230 #define REQTYPE_HOST_TO_DEVICE 0x40 231 #define REQTYPE_DEVICE_TO_HOST 0xc0 232 233 /* Config request codes */ 234 #define CP210X_IFC_ENABLE 0x00 235 #define CP210X_SET_BAUDDIV 0x01 236 #define CP210X_GET_BAUDDIV 0x02 237 #define CP210X_SET_LINE_CTL 0x03 238 #define CP210X_GET_LINE_CTL 0x04 239 #define CP210X_SET_BREAK 0x05 240 #define CP210X_IMM_CHAR 0x06 241 #define CP210X_SET_MHS 0x07 242 #define CP210X_GET_MDMSTS 0x08 243 #define CP210X_SET_XON 0x09 244 #define CP210X_SET_XOFF 0x0A 245 #define CP210X_SET_EVENTMASK 0x0B 246 #define CP210X_GET_EVENTMASK 0x0C 247 #define CP210X_SET_CHAR 0x0D 248 #define CP210X_GET_CHARS 0x0E 249 #define CP210X_GET_PROPS 0x0F 250 #define CP210X_GET_COMM_STATUS 0x10 251 #define CP210X_RESET 0x11 252 #define CP210X_PURGE 0x12 253 #define CP210X_SET_FLOW 0x13 254 #define CP210X_GET_FLOW 0x14 255 #define CP210X_EMBED_EVENTS 0x15 256 #define CP210X_GET_EVENTSTATE 0x16 257 #define CP210X_SET_CHARS 0x19 258 #define CP210X_GET_BAUDRATE 0x1D 259 #define CP210X_SET_BAUDRATE 0x1E 260 261 /* CP210X_IFC_ENABLE */ 262 #define UART_ENABLE 0x0001 263 #define UART_DISABLE 0x0000 264 265 /* CP210X_(SET|GET)_BAUDDIV */ 266 #define BAUD_RATE_GEN_FREQ 0x384000 267 268 /* CP210X_(SET|GET)_LINE_CTL */ 269 #define BITS_DATA_MASK 0X0f00 270 #define BITS_DATA_5 0X0500 271 #define BITS_DATA_6 0X0600 272 #define BITS_DATA_7 0X0700 273 #define BITS_DATA_8 0X0800 274 #define BITS_DATA_9 0X0900 275 276 #define BITS_PARITY_MASK 0x00f0 277 #define BITS_PARITY_NONE 0x0000 278 #define BITS_PARITY_ODD 0x0010 279 #define BITS_PARITY_EVEN 0x0020 280 #define BITS_PARITY_MARK 0x0030 281 #define BITS_PARITY_SPACE 0x0040 282 283 #define BITS_STOP_MASK 0x000f 284 #define BITS_STOP_1 0x0000 285 #define BITS_STOP_1_5 0x0001 286 #define BITS_STOP_2 0x0002 287 288 /* CP210X_SET_BREAK */ 289 #define BREAK_ON 0x0001 290 #define BREAK_OFF 0x0000 291 292 /* CP210X_(SET_MHS|GET_MDMSTS) */ 293 #define CONTROL_DTR 0x0001 294 #define CONTROL_RTS 0x0002 295 #define CONTROL_CTS 0x0010 296 #define CONTROL_DSR 0x0020 297 #define CONTROL_RING 0x0040 298 #define CONTROL_DCD 0x0080 299 #define CONTROL_WRITE_DTR 0x0100 300 #define CONTROL_WRITE_RTS 0x0200 301 302 /* 303 * cp210x_get_config 304 * Reads from the CP210x configuration registers 305 * 'size' is specified in bytes. 306 * 'data' is a pointer to a pre-allocated array of integers large 307 * enough to hold 'size' bytes (with 4 bytes to each integer) 308 */ 309 static int cp210x_get_config(struct usb_serial_port *port, u8 request, 310 unsigned int *data, int size) 311 { 312 struct usb_serial *serial = port->serial; 313 struct cp210x_serial_private *spriv = usb_get_serial_data(serial); 314 __le32 *buf; 315 int result, i, length; 316 317 /* Number of integers required to contain the array */ 318 length = (((size - 1) | 3) + 1) / 4; 319 320 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL); 321 if (!buf) 322 return -ENOMEM; 323 324 /* Issue the request, attempting to read 'size' bytes */ 325 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 326 request, REQTYPE_INTERFACE_TO_HOST, 0x0000, 327 spriv->bInterfaceNumber, buf, size, 328 USB_CTRL_GET_TIMEOUT); 329 330 /* Convert data into an array of integers */ 331 for (i = 0; i < length; i++) 332 data[i] = le32_to_cpu(buf[i]); 333 334 kfree(buf); 335 336 if (result != size) { 337 dev_dbg(&port->dev, "%s - Unable to send config request, request=0x%x size=%d result=%d\n", 338 __func__, request, size, result); 339 if (result > 0) 340 result = -EPROTO; 341 342 return result; 343 } 344 345 return 0; 346 } 347 348 /* 349 * cp210x_set_config 350 * Writes to the CP210x configuration registers 351 * Values less than 16 bits wide are sent directly 352 * 'size' is specified in bytes. 353 */ 354 static int cp210x_set_config(struct usb_serial_port *port, u8 request, 355 unsigned int *data, int size) 356 { 357 struct usb_serial *serial = port->serial; 358 struct cp210x_serial_private *spriv = usb_get_serial_data(serial); 359 __le32 *buf; 360 int result, i, length; 361 362 /* Number of integers required to contain the array */ 363 length = (((size - 1) | 3) + 1) / 4; 364 365 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL); 366 if (!buf) 367 return -ENOMEM; 368 369 /* Array of integers into bytes */ 370 for (i = 0; i < length; i++) 371 buf[i] = cpu_to_le32(data[i]); 372 373 if (size > 2) { 374 result = usb_control_msg(serial->dev, 375 usb_sndctrlpipe(serial->dev, 0), 376 request, REQTYPE_HOST_TO_INTERFACE, 0x0000, 377 spriv->bInterfaceNumber, buf, size, 378 USB_CTRL_SET_TIMEOUT); 379 } else { 380 result = usb_control_msg(serial->dev, 381 usb_sndctrlpipe(serial->dev, 0), 382 request, REQTYPE_HOST_TO_INTERFACE, data[0], 383 spriv->bInterfaceNumber, NULL, 0, 384 USB_CTRL_SET_TIMEOUT); 385 } 386 387 kfree(buf); 388 389 if ((size > 2 && result != size) || result < 0) { 390 dev_dbg(&port->dev, "%s - Unable to send request, request=0x%x size=%d result=%d\n", 391 __func__, request, size, result); 392 if (result > 0) 393 result = -EPROTO; 394 395 return result; 396 } 397 398 return 0; 399 } 400 401 /* 402 * cp210x_set_config_single 403 * Convenience function for calling cp210x_set_config on single data values 404 * without requiring an integer pointer 405 */ 406 static inline int cp210x_set_config_single(struct usb_serial_port *port, 407 u8 request, unsigned int data) 408 { 409 return cp210x_set_config(port, request, &data, 2); 410 } 411 412 /* 413 * cp210x_quantise_baudrate 414 * Quantises the baud rate as per AN205 Table 1 415 */ 416 static unsigned int cp210x_quantise_baudrate(unsigned int baud) 417 { 418 if (baud <= 300) 419 baud = 300; 420 else if (baud <= 600) baud = 600; 421 else if (baud <= 1200) baud = 1200; 422 else if (baud <= 1800) baud = 1800; 423 else if (baud <= 2400) baud = 2400; 424 else if (baud <= 4000) baud = 4000; 425 else if (baud <= 4803) baud = 4800; 426 else if (baud <= 7207) baud = 7200; 427 else if (baud <= 9612) baud = 9600; 428 else if (baud <= 14428) baud = 14400; 429 else if (baud <= 16062) baud = 16000; 430 else if (baud <= 19250) baud = 19200; 431 else if (baud <= 28912) baud = 28800; 432 else if (baud <= 38601) baud = 38400; 433 else if (baud <= 51558) baud = 51200; 434 else if (baud <= 56280) baud = 56000; 435 else if (baud <= 58053) baud = 57600; 436 else if (baud <= 64111) baud = 64000; 437 else if (baud <= 77608) baud = 76800; 438 else if (baud <= 117028) baud = 115200; 439 else if (baud <= 129347) baud = 128000; 440 else if (baud <= 156868) baud = 153600; 441 else if (baud <= 237832) baud = 230400; 442 else if (baud <= 254234) baud = 250000; 443 else if (baud <= 273066) baud = 256000; 444 else if (baud <= 491520) baud = 460800; 445 else if (baud <= 567138) baud = 500000; 446 else if (baud <= 670254) baud = 576000; 447 else if (baud < 1000000) 448 baud = 921600; 449 else if (baud > 2000000) 450 baud = 2000000; 451 return baud; 452 } 453 454 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port) 455 { 456 int result; 457 458 result = cp210x_set_config_single(port, CP210X_IFC_ENABLE, 459 UART_ENABLE); 460 if (result) { 461 dev_err(&port->dev, "%s - Unable to enable UART\n", __func__); 462 return result; 463 } 464 465 /* Configure the termios structure */ 466 cp210x_get_termios(tty, port); 467 468 /* The baud rate must be initialised on cp2104 */ 469 if (tty) 470 cp210x_change_speed(tty, port, NULL); 471 472 return usb_serial_generic_open(tty, port); 473 } 474 475 static void cp210x_close(struct usb_serial_port *port) 476 { 477 usb_serial_generic_close(port); 478 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE); 479 } 480 481 /* 482 * cp210x_get_termios 483 * Reads the baud rate, data bits, parity, stop bits and flow control mode 484 * from the device, corrects any unsupported values, and configures the 485 * termios structure to reflect the state of the device 486 */ 487 static void cp210x_get_termios(struct tty_struct *tty, 488 struct usb_serial_port *port) 489 { 490 unsigned int baud; 491 492 if (tty) { 493 cp210x_get_termios_port(tty->driver_data, 494 &tty->termios.c_cflag, &baud); 495 tty_encode_baud_rate(tty, baud, baud); 496 } else { 497 unsigned int cflag; 498 cflag = 0; 499 cp210x_get_termios_port(port, &cflag, &baud); 500 } 501 } 502 503 /* 504 * cp210x_get_termios_port 505 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port. 506 */ 507 static void cp210x_get_termios_port(struct usb_serial_port *port, 508 unsigned int *cflagp, unsigned int *baudp) 509 { 510 struct device *dev = &port->dev; 511 unsigned int cflag, modem_ctl[4]; 512 unsigned int baud; 513 unsigned int bits; 514 515 cp210x_get_config(port, CP210X_GET_BAUDRATE, &baud, 4); 516 517 dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud); 518 *baudp = baud; 519 520 cflag = *cflagp; 521 522 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 523 cflag &= ~CSIZE; 524 switch (bits & BITS_DATA_MASK) { 525 case BITS_DATA_5: 526 dev_dbg(dev, "%s - data bits = 5\n", __func__); 527 cflag |= CS5; 528 break; 529 case BITS_DATA_6: 530 dev_dbg(dev, "%s - data bits = 6\n", __func__); 531 cflag |= CS6; 532 break; 533 case BITS_DATA_7: 534 dev_dbg(dev, "%s - data bits = 7\n", __func__); 535 cflag |= CS7; 536 break; 537 case BITS_DATA_8: 538 dev_dbg(dev, "%s - data bits = 8\n", __func__); 539 cflag |= CS8; 540 break; 541 case BITS_DATA_9: 542 dev_dbg(dev, "%s - data bits = 9 (not supported, using 8 data bits)\n", __func__); 543 cflag |= CS8; 544 bits &= ~BITS_DATA_MASK; 545 bits |= BITS_DATA_8; 546 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 547 break; 548 default: 549 dev_dbg(dev, "%s - Unknown number of data bits, using 8\n", __func__); 550 cflag |= CS8; 551 bits &= ~BITS_DATA_MASK; 552 bits |= BITS_DATA_8; 553 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 554 break; 555 } 556 557 switch (bits & BITS_PARITY_MASK) { 558 case BITS_PARITY_NONE: 559 dev_dbg(dev, "%s - parity = NONE\n", __func__); 560 cflag &= ~PARENB; 561 break; 562 case BITS_PARITY_ODD: 563 dev_dbg(dev, "%s - parity = ODD\n", __func__); 564 cflag |= (PARENB|PARODD); 565 break; 566 case BITS_PARITY_EVEN: 567 dev_dbg(dev, "%s - parity = EVEN\n", __func__); 568 cflag &= ~PARODD; 569 cflag |= PARENB; 570 break; 571 case BITS_PARITY_MARK: 572 dev_dbg(dev, "%s - parity = MARK\n", __func__); 573 cflag |= (PARENB|PARODD|CMSPAR); 574 break; 575 case BITS_PARITY_SPACE: 576 dev_dbg(dev, "%s - parity = SPACE\n", __func__); 577 cflag &= ~PARODD; 578 cflag |= (PARENB|CMSPAR); 579 break; 580 default: 581 dev_dbg(dev, "%s - Unknown parity mode, disabling parity\n", __func__); 582 cflag &= ~PARENB; 583 bits &= ~BITS_PARITY_MASK; 584 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 585 break; 586 } 587 588 cflag &= ~CSTOPB; 589 switch (bits & BITS_STOP_MASK) { 590 case BITS_STOP_1: 591 dev_dbg(dev, "%s - stop bits = 1\n", __func__); 592 break; 593 case BITS_STOP_1_5: 594 dev_dbg(dev, "%s - stop bits = 1.5 (not supported, using 1 stop bit)\n", __func__); 595 bits &= ~BITS_STOP_MASK; 596 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 597 break; 598 case BITS_STOP_2: 599 dev_dbg(dev, "%s - stop bits = 2\n", __func__); 600 cflag |= CSTOPB; 601 break; 602 default: 603 dev_dbg(dev, "%s - Unknown number of stop bits, using 1 stop bit\n", __func__); 604 bits &= ~BITS_STOP_MASK; 605 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 606 break; 607 } 608 609 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 610 if (modem_ctl[0] & 0x0008) { 611 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__); 612 cflag |= CRTSCTS; 613 } else { 614 dev_dbg(dev, "%s - flow control = NONE\n", __func__); 615 cflag &= ~CRTSCTS; 616 } 617 618 *cflagp = cflag; 619 } 620 621 /* 622 * CP2101 supports the following baud rates: 623 * 624 * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800, 625 * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600 626 * 627 * CP2102 and CP2103 support the following additional rates: 628 * 629 * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000, 630 * 576000 631 * 632 * The device will map a requested rate to a supported one, but the result 633 * of requests for rates greater than 1053257 is undefined (see AN205). 634 * 635 * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud, 636 * respectively, with an error less than 1%. The actual rates are determined 637 * by 638 * 639 * div = round(freq / (2 x prescale x request)) 640 * actual = freq / (2 x prescale x div) 641 * 642 * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps 643 * or 1 otherwise. 644 * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1 645 * otherwise. 646 */ 647 static void cp210x_change_speed(struct tty_struct *tty, 648 struct usb_serial_port *port, struct ktermios *old_termios) 649 { 650 u32 baud; 651 652 baud = tty->termios.c_ospeed; 653 654 /* This maps the requested rate to a rate valid on cp2102 or cp2103, 655 * or to an arbitrary rate in [1M,2M]. 656 * 657 * NOTE: B0 is not implemented. 658 */ 659 baud = cp210x_quantise_baudrate(baud); 660 661 dev_dbg(&port->dev, "%s - setting baud rate to %u\n", __func__, baud); 662 if (cp210x_set_config(port, CP210X_SET_BAUDRATE, &baud, 663 sizeof(baud))) { 664 dev_warn(&port->dev, "failed to set baud rate to %u\n", baud); 665 if (old_termios) 666 baud = old_termios->c_ospeed; 667 else 668 baud = 9600; 669 } 670 671 tty_encode_baud_rate(tty, baud, baud); 672 } 673 674 static void cp210x_set_termios(struct tty_struct *tty, 675 struct usb_serial_port *port, struct ktermios *old_termios) 676 { 677 struct device *dev = &port->dev; 678 unsigned int cflag, old_cflag; 679 unsigned int bits; 680 unsigned int modem_ctl[4]; 681 682 cflag = tty->termios.c_cflag; 683 old_cflag = old_termios->c_cflag; 684 685 if (tty->termios.c_ospeed != old_termios->c_ospeed) 686 cp210x_change_speed(tty, port, old_termios); 687 688 /* If the number of data bits is to be updated */ 689 if ((cflag & CSIZE) != (old_cflag & CSIZE)) { 690 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 691 bits &= ~BITS_DATA_MASK; 692 switch (cflag & CSIZE) { 693 case CS5: 694 bits |= BITS_DATA_5; 695 dev_dbg(dev, "%s - data bits = 5\n", __func__); 696 break; 697 case CS6: 698 bits |= BITS_DATA_6; 699 dev_dbg(dev, "%s - data bits = 6\n", __func__); 700 break; 701 case CS7: 702 bits |= BITS_DATA_7; 703 dev_dbg(dev, "%s - data bits = 7\n", __func__); 704 break; 705 case CS8: 706 bits |= BITS_DATA_8; 707 dev_dbg(dev, "%s - data bits = 8\n", __func__); 708 break; 709 /*case CS9: 710 bits |= BITS_DATA_9; 711 dev_dbg(dev, "%s - data bits = 9\n", __func__); 712 break;*/ 713 default: 714 dev_dbg(dev, "cp210x driver does not support the number of bits requested, using 8 bit mode\n"); 715 bits |= BITS_DATA_8; 716 break; 717 } 718 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 719 dev_dbg(dev, "Number of data bits requested not supported by device\n"); 720 } 721 722 if ((cflag & (PARENB|PARODD|CMSPAR)) != 723 (old_cflag & (PARENB|PARODD|CMSPAR))) { 724 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 725 bits &= ~BITS_PARITY_MASK; 726 if (cflag & PARENB) { 727 if (cflag & CMSPAR) { 728 if (cflag & PARODD) { 729 bits |= BITS_PARITY_MARK; 730 dev_dbg(dev, "%s - parity = MARK\n", __func__); 731 } else { 732 bits |= BITS_PARITY_SPACE; 733 dev_dbg(dev, "%s - parity = SPACE\n", __func__); 734 } 735 } else { 736 if (cflag & PARODD) { 737 bits |= BITS_PARITY_ODD; 738 dev_dbg(dev, "%s - parity = ODD\n", __func__); 739 } else { 740 bits |= BITS_PARITY_EVEN; 741 dev_dbg(dev, "%s - parity = EVEN\n", __func__); 742 } 743 } 744 } 745 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 746 dev_dbg(dev, "Parity mode not supported by device\n"); 747 } 748 749 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { 750 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 751 bits &= ~BITS_STOP_MASK; 752 if (cflag & CSTOPB) { 753 bits |= BITS_STOP_2; 754 dev_dbg(dev, "%s - stop bits = 2\n", __func__); 755 } else { 756 bits |= BITS_STOP_1; 757 dev_dbg(dev, "%s - stop bits = 1\n", __func__); 758 } 759 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 760 dev_dbg(dev, "Number of stop bits requested not supported by device\n"); 761 } 762 763 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { 764 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 765 dev_dbg(dev, "%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n", 766 __func__, modem_ctl[0], modem_ctl[1], 767 modem_ctl[2], modem_ctl[3]); 768 769 if (cflag & CRTSCTS) { 770 modem_ctl[0] &= ~0x7B; 771 modem_ctl[0] |= 0x09; 772 modem_ctl[1] = 0x80; 773 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__); 774 } else { 775 modem_ctl[0] &= ~0x7B; 776 modem_ctl[0] |= 0x01; 777 modem_ctl[1] |= 0x40; 778 dev_dbg(dev, "%s - flow control = NONE\n", __func__); 779 } 780 781 dev_dbg(dev, "%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n", 782 __func__, modem_ctl[0], modem_ctl[1], 783 modem_ctl[2], modem_ctl[3]); 784 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16); 785 } 786 787 } 788 789 static int cp210x_tiocmset(struct tty_struct *tty, 790 unsigned int set, unsigned int clear) 791 { 792 struct usb_serial_port *port = tty->driver_data; 793 return cp210x_tiocmset_port(port, set, clear); 794 } 795 796 static int cp210x_tiocmset_port(struct usb_serial_port *port, 797 unsigned int set, unsigned int clear) 798 { 799 unsigned int control = 0; 800 801 if (set & TIOCM_RTS) { 802 control |= CONTROL_RTS; 803 control |= CONTROL_WRITE_RTS; 804 } 805 if (set & TIOCM_DTR) { 806 control |= CONTROL_DTR; 807 control |= CONTROL_WRITE_DTR; 808 } 809 if (clear & TIOCM_RTS) { 810 control &= ~CONTROL_RTS; 811 control |= CONTROL_WRITE_RTS; 812 } 813 if (clear & TIOCM_DTR) { 814 control &= ~CONTROL_DTR; 815 control |= CONTROL_WRITE_DTR; 816 } 817 818 dev_dbg(&port->dev, "%s - control = 0x%.4x\n", __func__, control); 819 820 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2); 821 } 822 823 static void cp210x_dtr_rts(struct usb_serial_port *p, int on) 824 { 825 if (on) 826 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0); 827 else 828 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS); 829 } 830 831 static int cp210x_tiocmget(struct tty_struct *tty) 832 { 833 struct usb_serial_port *port = tty->driver_data; 834 unsigned int control; 835 int result; 836 837 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1); 838 839 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) 840 |((control & CONTROL_RTS) ? TIOCM_RTS : 0) 841 |((control & CONTROL_CTS) ? TIOCM_CTS : 0) 842 |((control & CONTROL_DSR) ? TIOCM_DSR : 0) 843 |((control & CONTROL_RING)? TIOCM_RI : 0) 844 |((control & CONTROL_DCD) ? TIOCM_CD : 0); 845 846 dev_dbg(&port->dev, "%s - control = 0x%.2x\n", __func__, control); 847 848 return result; 849 } 850 851 static void cp210x_break_ctl(struct tty_struct *tty, int break_state) 852 { 853 struct usb_serial_port *port = tty->driver_data; 854 unsigned int state; 855 856 if (break_state == 0) 857 state = BREAK_OFF; 858 else 859 state = BREAK_ON; 860 dev_dbg(&port->dev, "%s - turning break %s\n", __func__, 861 state == BREAK_OFF ? "off" : "on"); 862 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2); 863 } 864 865 static int cp210x_startup(struct usb_serial *serial) 866 { 867 struct usb_host_interface *cur_altsetting; 868 struct cp210x_serial_private *spriv; 869 870 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL); 871 if (!spriv) 872 return -ENOMEM; 873 874 cur_altsetting = serial->interface->cur_altsetting; 875 spriv->bInterfaceNumber = cur_altsetting->desc.bInterfaceNumber; 876 877 usb_set_serial_data(serial, spriv); 878 879 return 0; 880 } 881 882 static void cp210x_release(struct usb_serial *serial) 883 { 884 struct cp210x_serial_private *spriv; 885 886 spriv = usb_get_serial_data(serial); 887 kfree(spriv); 888 } 889 890 module_usb_serial_driver(serial_drivers, id_table); 891 892 MODULE_DESCRIPTION(DRIVER_DESC); 893 MODULE_LICENSE("GPL"); 894