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