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(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */ 60 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */ 61 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */ 62 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */ 63 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */ 64 { USB_DEVICE(0x0FDE, 0xCA05) }, /* OWL Wireless Electricity Monitor CM-160 */ 65 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */ 66 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */ 67 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */ 68 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */ 69 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */ 70 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */ 71 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */ 72 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */ 73 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */ 74 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */ 75 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */ 76 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */ 77 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */ 78 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */ 79 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */ 80 { USB_DEVICE(0x10C4, 0x80C4) }, /* Cygnal Integrated Products, Inc., Optris infrared thermometer */ 81 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */ 82 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */ 83 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */ 84 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */ 85 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */ 86 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */ 87 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */ 88 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */ 89 { USB_DEVICE(0x2405, 0x0003) }, /* West Mountain Radio RIGblaster Advantage */ 90 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */ 91 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */ 92 { USB_DEVICE(0x10C4, 0x815F) }, /* Timewave HamLinkUSB */ 93 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */ 94 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */ 95 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */ 96 { USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */ 97 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */ 98 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */ 99 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */ 100 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */ 101 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */ 102 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */ 103 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */ 104 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */ 105 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */ 106 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */ 107 { USB_DEVICE(0x10C4, 0x8281) }, /* Nanotec Plug & Drive */ 108 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */ 109 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */ 110 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */ 111 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */ 112 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */ 113 { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */ 114 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */ 115 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */ 116 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */ 117 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */ 118 { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */ 119 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */ 120 { USB_DEVICE(0x10C4, 0x85F8) }, /* Virtenio Preon32 */ 121 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */ 122 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */ 123 { USB_DEVICE(0x10C4, 0x8875) }, /* CEL MeshConnect USB Stick */ 124 { USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */ 125 { USB_DEVICE(0x10C4, 0x88A5) }, /* Planet Innovation Ingeni ZigBee USB Device */ 126 { USB_DEVICE(0x10C4, 0x8946) }, /* Ketra N1 Wireless Interface */ 127 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ 128 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ 129 { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */ 130 { USB_DEVICE(0x10C4, 0xEA80) }, /* Silicon Labs factory default */ 131 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */ 132 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */ 133 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */ 134 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */ 135 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */ 136 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ 137 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */ 138 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ 139 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */ 140 { USB_DEVICE(0x166A, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */ 141 { USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */ 142 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ 143 { USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */ 144 { USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */ 145 { USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */ 146 { USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */ 147 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ 148 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */ 149 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */ 150 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */ 151 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */ 152 { USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */ 153 { USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */ 154 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */ 155 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */ 156 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */ 157 { USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */ 158 { USB_DEVICE(0x1B1C, 0x1C00) }, /* Corsair USB Dongle */ 159 { USB_DEVICE(0x1BA4, 0x0002) }, /* Silicon Labs 358x factory default */ 160 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */ 161 { USB_DEVICE(0x1D6F, 0x0010) }, /* Seluxit ApS RF Dongle */ 162 { USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */ 163 { USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */ 164 { USB_DEVICE(0x1FB9, 0x0100) }, /* Lake Shore Model 121 Current Source */ 165 { USB_DEVICE(0x1FB9, 0x0200) }, /* Lake Shore Model 218A Temperature Monitor */ 166 { USB_DEVICE(0x1FB9, 0x0201) }, /* Lake Shore Model 219 Temperature Monitor */ 167 { USB_DEVICE(0x1FB9, 0x0202) }, /* Lake Shore Model 233 Temperature Transmitter */ 168 { USB_DEVICE(0x1FB9, 0x0203) }, /* Lake Shore Model 235 Temperature Transmitter */ 169 { USB_DEVICE(0x1FB9, 0x0300) }, /* Lake Shore Model 335 Temperature Controller */ 170 { USB_DEVICE(0x1FB9, 0x0301) }, /* Lake Shore Model 336 Temperature Controller */ 171 { USB_DEVICE(0x1FB9, 0x0302) }, /* Lake Shore Model 350 Temperature Controller */ 172 { USB_DEVICE(0x1FB9, 0x0303) }, /* Lake Shore Model 371 AC Bridge */ 173 { USB_DEVICE(0x1FB9, 0x0400) }, /* Lake Shore Model 411 Handheld Gaussmeter */ 174 { USB_DEVICE(0x1FB9, 0x0401) }, /* Lake Shore Model 425 Gaussmeter */ 175 { USB_DEVICE(0x1FB9, 0x0402) }, /* Lake Shore Model 455A Gaussmeter */ 176 { USB_DEVICE(0x1FB9, 0x0403) }, /* Lake Shore Model 475A Gaussmeter */ 177 { USB_DEVICE(0x1FB9, 0x0404) }, /* Lake Shore Model 465 Three Axis Gaussmeter */ 178 { USB_DEVICE(0x1FB9, 0x0600) }, /* Lake Shore Model 625A Superconducting MPS */ 179 { USB_DEVICE(0x1FB9, 0x0601) }, /* Lake Shore Model 642A Magnet Power Supply */ 180 { USB_DEVICE(0x1FB9, 0x0602) }, /* Lake Shore Model 648 Magnet Power Supply */ 181 { USB_DEVICE(0x1FB9, 0x0700) }, /* Lake Shore Model 737 VSM Controller */ 182 { USB_DEVICE(0x1FB9, 0x0701) }, /* Lake Shore Model 776 Hall Matrix */ 183 { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */ 184 { USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */ 185 { USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */ 186 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */ 187 { } /* Terminating Entry */ 188 }; 189 190 MODULE_DEVICE_TABLE(usb, id_table); 191 192 struct cp210x_serial_private { 193 __u8 bInterfaceNumber; 194 }; 195 196 static struct usb_serial_driver cp210x_device = { 197 .driver = { 198 .owner = THIS_MODULE, 199 .name = "cp210x", 200 }, 201 .id_table = id_table, 202 .num_ports = 1, 203 .bulk_in_size = 256, 204 .bulk_out_size = 256, 205 .open = cp210x_open, 206 .close = cp210x_close, 207 .break_ctl = cp210x_break_ctl, 208 .set_termios = cp210x_set_termios, 209 .tiocmget = cp210x_tiocmget, 210 .tiocmset = cp210x_tiocmset, 211 .attach = cp210x_startup, 212 .release = cp210x_release, 213 .dtr_rts = cp210x_dtr_rts 214 }; 215 216 static struct usb_serial_driver * const serial_drivers[] = { 217 &cp210x_device, NULL 218 }; 219 220 /* Config request types */ 221 #define REQTYPE_HOST_TO_INTERFACE 0x41 222 #define REQTYPE_INTERFACE_TO_HOST 0xc1 223 #define REQTYPE_HOST_TO_DEVICE 0x40 224 #define REQTYPE_DEVICE_TO_HOST 0xc0 225 226 /* Config request codes */ 227 #define CP210X_IFC_ENABLE 0x00 228 #define CP210X_SET_BAUDDIV 0x01 229 #define CP210X_GET_BAUDDIV 0x02 230 #define CP210X_SET_LINE_CTL 0x03 231 #define CP210X_GET_LINE_CTL 0x04 232 #define CP210X_SET_BREAK 0x05 233 #define CP210X_IMM_CHAR 0x06 234 #define CP210X_SET_MHS 0x07 235 #define CP210X_GET_MDMSTS 0x08 236 #define CP210X_SET_XON 0x09 237 #define CP210X_SET_XOFF 0x0A 238 #define CP210X_SET_EVENTMASK 0x0B 239 #define CP210X_GET_EVENTMASK 0x0C 240 #define CP210X_SET_CHAR 0x0D 241 #define CP210X_GET_CHARS 0x0E 242 #define CP210X_GET_PROPS 0x0F 243 #define CP210X_GET_COMM_STATUS 0x10 244 #define CP210X_RESET 0x11 245 #define CP210X_PURGE 0x12 246 #define CP210X_SET_FLOW 0x13 247 #define CP210X_GET_FLOW 0x14 248 #define CP210X_EMBED_EVENTS 0x15 249 #define CP210X_GET_EVENTSTATE 0x16 250 #define CP210X_SET_CHARS 0x19 251 #define CP210X_GET_BAUDRATE 0x1D 252 #define CP210X_SET_BAUDRATE 0x1E 253 254 /* CP210X_IFC_ENABLE */ 255 #define UART_ENABLE 0x0001 256 #define UART_DISABLE 0x0000 257 258 /* CP210X_(SET|GET)_BAUDDIV */ 259 #define BAUD_RATE_GEN_FREQ 0x384000 260 261 /* CP210X_(SET|GET)_LINE_CTL */ 262 #define BITS_DATA_MASK 0X0f00 263 #define BITS_DATA_5 0X0500 264 #define BITS_DATA_6 0X0600 265 #define BITS_DATA_7 0X0700 266 #define BITS_DATA_8 0X0800 267 #define BITS_DATA_9 0X0900 268 269 #define BITS_PARITY_MASK 0x00f0 270 #define BITS_PARITY_NONE 0x0000 271 #define BITS_PARITY_ODD 0x0010 272 #define BITS_PARITY_EVEN 0x0020 273 #define BITS_PARITY_MARK 0x0030 274 #define BITS_PARITY_SPACE 0x0040 275 276 #define BITS_STOP_MASK 0x000f 277 #define BITS_STOP_1 0x0000 278 #define BITS_STOP_1_5 0x0001 279 #define BITS_STOP_2 0x0002 280 281 /* CP210X_SET_BREAK */ 282 #define BREAK_ON 0x0001 283 #define BREAK_OFF 0x0000 284 285 /* CP210X_(SET_MHS|GET_MDMSTS) */ 286 #define CONTROL_DTR 0x0001 287 #define CONTROL_RTS 0x0002 288 #define CONTROL_CTS 0x0010 289 #define CONTROL_DSR 0x0020 290 #define CONTROL_RING 0x0040 291 #define CONTROL_DCD 0x0080 292 #define CONTROL_WRITE_DTR 0x0100 293 #define CONTROL_WRITE_RTS 0x0200 294 295 /* 296 * cp210x_get_config 297 * Reads from the CP210x configuration registers 298 * 'size' is specified in bytes. 299 * 'data' is a pointer to a pre-allocated array of integers large 300 * enough to hold 'size' bytes (with 4 bytes to each integer) 301 */ 302 static int cp210x_get_config(struct usb_serial_port *port, u8 request, 303 unsigned int *data, int size) 304 { 305 struct usb_serial *serial = port->serial; 306 struct cp210x_serial_private *spriv = usb_get_serial_data(serial); 307 __le32 *buf; 308 int result, i, length; 309 310 /* Number of integers required to contain the array */ 311 length = (((size - 1) | 3) + 1) / 4; 312 313 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL); 314 if (!buf) 315 return -ENOMEM; 316 317 /* Issue the request, attempting to read 'size' bytes */ 318 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 319 request, REQTYPE_INTERFACE_TO_HOST, 0x0000, 320 spriv->bInterfaceNumber, buf, size, 321 USB_CTRL_GET_TIMEOUT); 322 323 /* Convert data into an array of integers */ 324 for (i = 0; i < length; i++) 325 data[i] = le32_to_cpu(buf[i]); 326 327 kfree(buf); 328 329 if (result != size) { 330 dev_dbg(&port->dev, "%s - Unable to send config request, request=0x%x size=%d result=%d\n", 331 __func__, request, size, result); 332 if (result > 0) 333 result = -EPROTO; 334 335 return result; 336 } 337 338 return 0; 339 } 340 341 /* 342 * cp210x_set_config 343 * Writes to the CP210x configuration registers 344 * Values less than 16 bits wide are sent directly 345 * 'size' is specified in bytes. 346 */ 347 static int cp210x_set_config(struct usb_serial_port *port, u8 request, 348 unsigned int *data, int size) 349 { 350 struct usb_serial *serial = port->serial; 351 struct cp210x_serial_private *spriv = usb_get_serial_data(serial); 352 __le32 *buf; 353 int result, i, length; 354 355 /* Number of integers required to contain the array */ 356 length = (((size - 1) | 3) + 1) / 4; 357 358 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL); 359 if (!buf) 360 return -ENOMEM; 361 362 /* Array of integers into bytes */ 363 for (i = 0; i < length; i++) 364 buf[i] = cpu_to_le32(data[i]); 365 366 if (size > 2) { 367 result = usb_control_msg(serial->dev, 368 usb_sndctrlpipe(serial->dev, 0), 369 request, REQTYPE_HOST_TO_INTERFACE, 0x0000, 370 spriv->bInterfaceNumber, buf, size, 371 USB_CTRL_SET_TIMEOUT); 372 } else { 373 result = usb_control_msg(serial->dev, 374 usb_sndctrlpipe(serial->dev, 0), 375 request, REQTYPE_HOST_TO_INTERFACE, data[0], 376 spriv->bInterfaceNumber, NULL, 0, 377 USB_CTRL_SET_TIMEOUT); 378 } 379 380 kfree(buf); 381 382 if ((size > 2 && result != size) || result < 0) { 383 dev_dbg(&port->dev, "%s - Unable to send request, request=0x%x size=%d result=%d\n", 384 __func__, request, size, result); 385 if (result > 0) 386 result = -EPROTO; 387 388 return result; 389 } 390 391 return 0; 392 } 393 394 /* 395 * cp210x_set_config_single 396 * Convenience function for calling cp210x_set_config on single data values 397 * without requiring an integer pointer 398 */ 399 static inline int cp210x_set_config_single(struct usb_serial_port *port, 400 u8 request, unsigned int data) 401 { 402 return cp210x_set_config(port, request, &data, 2); 403 } 404 405 /* 406 * cp210x_quantise_baudrate 407 * Quantises the baud rate as per AN205 Table 1 408 */ 409 static unsigned int cp210x_quantise_baudrate(unsigned int baud) 410 { 411 if (baud <= 300) 412 baud = 300; 413 else if (baud <= 600) baud = 600; 414 else if (baud <= 1200) baud = 1200; 415 else if (baud <= 1800) baud = 1800; 416 else if (baud <= 2400) baud = 2400; 417 else if (baud <= 4000) baud = 4000; 418 else if (baud <= 4803) baud = 4800; 419 else if (baud <= 7207) baud = 7200; 420 else if (baud <= 9612) baud = 9600; 421 else if (baud <= 14428) baud = 14400; 422 else if (baud <= 16062) baud = 16000; 423 else if (baud <= 19250) baud = 19200; 424 else if (baud <= 28912) baud = 28800; 425 else if (baud <= 38601) baud = 38400; 426 else if (baud <= 51558) baud = 51200; 427 else if (baud <= 56280) baud = 56000; 428 else if (baud <= 58053) baud = 57600; 429 else if (baud <= 64111) baud = 64000; 430 else if (baud <= 77608) baud = 76800; 431 else if (baud <= 117028) baud = 115200; 432 else if (baud <= 129347) baud = 128000; 433 else if (baud <= 156868) baud = 153600; 434 else if (baud <= 237832) baud = 230400; 435 else if (baud <= 254234) baud = 250000; 436 else if (baud <= 273066) baud = 256000; 437 else if (baud <= 491520) baud = 460800; 438 else if (baud <= 567138) baud = 500000; 439 else if (baud <= 670254) baud = 576000; 440 else if (baud < 1000000) 441 baud = 921600; 442 else if (baud > 2000000) 443 baud = 2000000; 444 return baud; 445 } 446 447 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port) 448 { 449 int result; 450 451 result = cp210x_set_config_single(port, CP210X_IFC_ENABLE, 452 UART_ENABLE); 453 if (result) { 454 dev_err(&port->dev, "%s - Unable to enable UART\n", __func__); 455 return result; 456 } 457 458 /* Configure the termios structure */ 459 cp210x_get_termios(tty, port); 460 461 /* The baud rate must be initialised on cp2104 */ 462 if (tty) 463 cp210x_change_speed(tty, port, NULL); 464 465 return usb_serial_generic_open(tty, port); 466 } 467 468 static void cp210x_close(struct usb_serial_port *port) 469 { 470 usb_serial_generic_close(port); 471 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE); 472 } 473 474 /* 475 * cp210x_get_termios 476 * Reads the baud rate, data bits, parity, stop bits and flow control mode 477 * from the device, corrects any unsupported values, and configures the 478 * termios structure to reflect the state of the device 479 */ 480 static void cp210x_get_termios(struct tty_struct *tty, 481 struct usb_serial_port *port) 482 { 483 unsigned int baud; 484 485 if (tty) { 486 cp210x_get_termios_port(tty->driver_data, 487 &tty->termios.c_cflag, &baud); 488 tty_encode_baud_rate(tty, baud, baud); 489 } else { 490 unsigned int cflag; 491 cflag = 0; 492 cp210x_get_termios_port(port, &cflag, &baud); 493 } 494 } 495 496 /* 497 * cp210x_get_termios_port 498 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port. 499 */ 500 static void cp210x_get_termios_port(struct usb_serial_port *port, 501 unsigned int *cflagp, unsigned int *baudp) 502 { 503 struct device *dev = &port->dev; 504 unsigned int cflag, modem_ctl[4]; 505 unsigned int baud; 506 unsigned int bits; 507 508 cp210x_get_config(port, CP210X_GET_BAUDRATE, &baud, 4); 509 510 dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud); 511 *baudp = baud; 512 513 cflag = *cflagp; 514 515 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 516 cflag &= ~CSIZE; 517 switch (bits & BITS_DATA_MASK) { 518 case BITS_DATA_5: 519 dev_dbg(dev, "%s - data bits = 5\n", __func__); 520 cflag |= CS5; 521 break; 522 case BITS_DATA_6: 523 dev_dbg(dev, "%s - data bits = 6\n", __func__); 524 cflag |= CS6; 525 break; 526 case BITS_DATA_7: 527 dev_dbg(dev, "%s - data bits = 7\n", __func__); 528 cflag |= CS7; 529 break; 530 case BITS_DATA_8: 531 dev_dbg(dev, "%s - data bits = 8\n", __func__); 532 cflag |= CS8; 533 break; 534 case BITS_DATA_9: 535 dev_dbg(dev, "%s - data bits = 9 (not supported, using 8 data bits)\n", __func__); 536 cflag |= CS8; 537 bits &= ~BITS_DATA_MASK; 538 bits |= BITS_DATA_8; 539 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 540 break; 541 default: 542 dev_dbg(dev, "%s - Unknown number of data bits, using 8\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 } 549 550 switch (bits & BITS_PARITY_MASK) { 551 case BITS_PARITY_NONE: 552 dev_dbg(dev, "%s - parity = NONE\n", __func__); 553 cflag &= ~PARENB; 554 break; 555 case BITS_PARITY_ODD: 556 dev_dbg(dev, "%s - parity = ODD\n", __func__); 557 cflag |= (PARENB|PARODD); 558 break; 559 case BITS_PARITY_EVEN: 560 dev_dbg(dev, "%s - parity = EVEN\n", __func__); 561 cflag &= ~PARODD; 562 cflag |= PARENB; 563 break; 564 case BITS_PARITY_MARK: 565 dev_dbg(dev, "%s - parity = MARK\n", __func__); 566 cflag |= (PARENB|PARODD|CMSPAR); 567 break; 568 case BITS_PARITY_SPACE: 569 dev_dbg(dev, "%s - parity = SPACE\n", __func__); 570 cflag &= ~PARODD; 571 cflag |= (PARENB|CMSPAR); 572 break; 573 default: 574 dev_dbg(dev, "%s - Unknown parity mode, disabling parity\n", __func__); 575 cflag &= ~PARENB; 576 bits &= ~BITS_PARITY_MASK; 577 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 578 break; 579 } 580 581 cflag &= ~CSTOPB; 582 switch (bits & BITS_STOP_MASK) { 583 case BITS_STOP_1: 584 dev_dbg(dev, "%s - stop bits = 1\n", __func__); 585 break; 586 case BITS_STOP_1_5: 587 dev_dbg(dev, "%s - stop bits = 1.5 (not supported, using 1 stop bit)\n", __func__); 588 bits &= ~BITS_STOP_MASK; 589 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 590 break; 591 case BITS_STOP_2: 592 dev_dbg(dev, "%s - stop bits = 2\n", __func__); 593 cflag |= CSTOPB; 594 break; 595 default: 596 dev_dbg(dev, "%s - Unknown number of stop bits, using 1 stop bit\n", __func__); 597 bits &= ~BITS_STOP_MASK; 598 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 599 break; 600 } 601 602 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 603 if (modem_ctl[0] & 0x0008) { 604 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__); 605 cflag |= CRTSCTS; 606 } else { 607 dev_dbg(dev, "%s - flow control = NONE\n", __func__); 608 cflag &= ~CRTSCTS; 609 } 610 611 *cflagp = cflag; 612 } 613 614 /* 615 * CP2101 supports the following baud rates: 616 * 617 * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800, 618 * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600 619 * 620 * CP2102 and CP2103 support the following additional rates: 621 * 622 * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000, 623 * 576000 624 * 625 * The device will map a requested rate to a supported one, but the result 626 * of requests for rates greater than 1053257 is undefined (see AN205). 627 * 628 * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud, 629 * respectively, with an error less than 1%. The actual rates are determined 630 * by 631 * 632 * div = round(freq / (2 x prescale x request)) 633 * actual = freq / (2 x prescale x div) 634 * 635 * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps 636 * or 1 otherwise. 637 * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1 638 * otherwise. 639 */ 640 static void cp210x_change_speed(struct tty_struct *tty, 641 struct usb_serial_port *port, struct ktermios *old_termios) 642 { 643 u32 baud; 644 645 baud = tty->termios.c_ospeed; 646 647 /* This maps the requested rate to a rate valid on cp2102 or cp2103, 648 * or to an arbitrary rate in [1M,2M]. 649 * 650 * NOTE: B0 is not implemented. 651 */ 652 baud = cp210x_quantise_baudrate(baud); 653 654 dev_dbg(&port->dev, "%s - setting baud rate to %u\n", __func__, baud); 655 if (cp210x_set_config(port, CP210X_SET_BAUDRATE, &baud, 656 sizeof(baud))) { 657 dev_warn(&port->dev, "failed to set baud rate to %u\n", baud); 658 if (old_termios) 659 baud = old_termios->c_ospeed; 660 else 661 baud = 9600; 662 } 663 664 tty_encode_baud_rate(tty, baud, baud); 665 } 666 667 static void cp210x_set_termios(struct tty_struct *tty, 668 struct usb_serial_port *port, struct ktermios *old_termios) 669 { 670 struct device *dev = &port->dev; 671 unsigned int cflag, old_cflag; 672 unsigned int bits; 673 unsigned int modem_ctl[4]; 674 675 cflag = tty->termios.c_cflag; 676 old_cflag = old_termios->c_cflag; 677 678 if (tty->termios.c_ospeed != old_termios->c_ospeed) 679 cp210x_change_speed(tty, port, old_termios); 680 681 /* If the number of data bits is to be updated */ 682 if ((cflag & CSIZE) != (old_cflag & CSIZE)) { 683 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 684 bits &= ~BITS_DATA_MASK; 685 switch (cflag & CSIZE) { 686 case CS5: 687 bits |= BITS_DATA_5; 688 dev_dbg(dev, "%s - data bits = 5\n", __func__); 689 break; 690 case CS6: 691 bits |= BITS_DATA_6; 692 dev_dbg(dev, "%s - data bits = 6\n", __func__); 693 break; 694 case CS7: 695 bits |= BITS_DATA_7; 696 dev_dbg(dev, "%s - data bits = 7\n", __func__); 697 break; 698 case CS8: 699 bits |= BITS_DATA_8; 700 dev_dbg(dev, "%s - data bits = 8\n", __func__); 701 break; 702 /*case CS9: 703 bits |= BITS_DATA_9; 704 dev_dbg(dev, "%s - data bits = 9\n", __func__); 705 break;*/ 706 default: 707 dev_dbg(dev, "cp210x driver does not support the number of bits requested, using 8 bit mode\n"); 708 bits |= BITS_DATA_8; 709 break; 710 } 711 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 712 dev_dbg(dev, "Number of data bits requested not supported by device\n"); 713 } 714 715 if ((cflag & (PARENB|PARODD|CMSPAR)) != 716 (old_cflag & (PARENB|PARODD|CMSPAR))) { 717 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 718 bits &= ~BITS_PARITY_MASK; 719 if (cflag & PARENB) { 720 if (cflag & CMSPAR) { 721 if (cflag & PARODD) { 722 bits |= BITS_PARITY_MARK; 723 dev_dbg(dev, "%s - parity = MARK\n", __func__); 724 } else { 725 bits |= BITS_PARITY_SPACE; 726 dev_dbg(dev, "%s - parity = SPACE\n", __func__); 727 } 728 } else { 729 if (cflag & PARODD) { 730 bits |= BITS_PARITY_ODD; 731 dev_dbg(dev, "%s - parity = ODD\n", __func__); 732 } else { 733 bits |= BITS_PARITY_EVEN; 734 dev_dbg(dev, "%s - parity = EVEN\n", __func__); 735 } 736 } 737 } 738 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 739 dev_dbg(dev, "Parity mode not supported by device\n"); 740 } 741 742 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { 743 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 744 bits &= ~BITS_STOP_MASK; 745 if (cflag & CSTOPB) { 746 bits |= BITS_STOP_2; 747 dev_dbg(dev, "%s - stop bits = 2\n", __func__); 748 } else { 749 bits |= BITS_STOP_1; 750 dev_dbg(dev, "%s - stop bits = 1\n", __func__); 751 } 752 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 753 dev_dbg(dev, "Number of stop bits requested not supported by device\n"); 754 } 755 756 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { 757 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 758 dev_dbg(dev, "%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n", 759 __func__, modem_ctl[0], modem_ctl[1], 760 modem_ctl[2], modem_ctl[3]); 761 762 if (cflag & CRTSCTS) { 763 modem_ctl[0] &= ~0x7B; 764 modem_ctl[0] |= 0x09; 765 modem_ctl[1] = 0x80; 766 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__); 767 } else { 768 modem_ctl[0] &= ~0x7B; 769 modem_ctl[0] |= 0x01; 770 modem_ctl[1] |= 0x40; 771 dev_dbg(dev, "%s - flow control = NONE\n", __func__); 772 } 773 774 dev_dbg(dev, "%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n", 775 __func__, modem_ctl[0], modem_ctl[1], 776 modem_ctl[2], modem_ctl[3]); 777 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16); 778 } 779 780 } 781 782 static int cp210x_tiocmset(struct tty_struct *tty, 783 unsigned int set, unsigned int clear) 784 { 785 struct usb_serial_port *port = tty->driver_data; 786 return cp210x_tiocmset_port(port, set, clear); 787 } 788 789 static int cp210x_tiocmset_port(struct usb_serial_port *port, 790 unsigned int set, unsigned int clear) 791 { 792 unsigned int control = 0; 793 794 if (set & TIOCM_RTS) { 795 control |= CONTROL_RTS; 796 control |= CONTROL_WRITE_RTS; 797 } 798 if (set & TIOCM_DTR) { 799 control |= CONTROL_DTR; 800 control |= CONTROL_WRITE_DTR; 801 } 802 if (clear & TIOCM_RTS) { 803 control &= ~CONTROL_RTS; 804 control |= CONTROL_WRITE_RTS; 805 } 806 if (clear & TIOCM_DTR) { 807 control &= ~CONTROL_DTR; 808 control |= CONTROL_WRITE_DTR; 809 } 810 811 dev_dbg(&port->dev, "%s - control = 0x%.4x\n", __func__, control); 812 813 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2); 814 } 815 816 static void cp210x_dtr_rts(struct usb_serial_port *p, int on) 817 { 818 if (on) 819 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0); 820 else 821 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS); 822 } 823 824 static int cp210x_tiocmget(struct tty_struct *tty) 825 { 826 struct usb_serial_port *port = tty->driver_data; 827 unsigned int control; 828 int result; 829 830 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1); 831 832 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) 833 |((control & CONTROL_RTS) ? TIOCM_RTS : 0) 834 |((control & CONTROL_CTS) ? TIOCM_CTS : 0) 835 |((control & CONTROL_DSR) ? TIOCM_DSR : 0) 836 |((control & CONTROL_RING)? TIOCM_RI : 0) 837 |((control & CONTROL_DCD) ? TIOCM_CD : 0); 838 839 dev_dbg(&port->dev, "%s - control = 0x%.2x\n", __func__, control); 840 841 return result; 842 } 843 844 static void cp210x_break_ctl(struct tty_struct *tty, int break_state) 845 { 846 struct usb_serial_port *port = tty->driver_data; 847 unsigned int state; 848 849 if (break_state == 0) 850 state = BREAK_OFF; 851 else 852 state = BREAK_ON; 853 dev_dbg(&port->dev, "%s - turning break %s\n", __func__, 854 state == BREAK_OFF ? "off" : "on"); 855 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2); 856 } 857 858 static int cp210x_startup(struct usb_serial *serial) 859 { 860 struct usb_host_interface *cur_altsetting; 861 struct cp210x_serial_private *spriv; 862 863 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL); 864 if (!spriv) 865 return -ENOMEM; 866 867 cur_altsetting = serial->interface->cur_altsetting; 868 spriv->bInterfaceNumber = cur_altsetting->desc.bInterfaceNumber; 869 870 usb_set_serial_data(serial, spriv); 871 872 return 0; 873 } 874 875 static void cp210x_release(struct usb_serial *serial) 876 { 877 struct cp210x_serial_private *spriv; 878 879 spriv = usb_get_serial_data(serial); 880 kfree(spriv); 881 } 882 883 module_usb_serial_driver(serial_drivers, id_table); 884 885 MODULE_DESCRIPTION(DRIVER_DESC); 886 MODULE_LICENSE("GPL"); 887