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